HK1215006B - A large and micritic glass lined pipeline and its manufacturing method - Google Patents

Description

Large-scale micro-crystallization glass lining pipeline and manufacturing method thereof

Technical Field

The invention relates to a medium conveying pipeline for petroleum, natural gas, chemical industry, coal particles and the like and a manufacturing method thereof, belonging to a long-line special pipeline for large-scale micro-crystallization glass-lined oil gas conveying, which has the advantages of firm combination of a metal layer of an integral pipeline and a glass-lined glaze layer, strong corrosion resistance, strong abrasion resistance, smooth surface, no deformation of structural members of the integral pipeline, strong shock resistance and strong mechanical property, ensures that the pipeline is not corroded for a long time, is smooth in circulation and can run safely.

Background

The petroleum and natural gas pipeline is called as an oil and gas pipeline for short, is an important component of national public safety in China, plays an extremely important strategic position in national economy, and is called as a national important life line. According to the report, the existing oil gas long-distance pipeline in China is about 10⁵km, a gathering and transportation pipeline of about 3 × 10⁵km, from the peak period of pipeline construction to the end of twelve in recent years, the total length of the oil and gas long-distance pipeline in China reaches 1.5 × 10⁵km。

Corrosion is one of the key factors affecting the reliability and service life of oil and gas pipelines. In recent years, the construction of petroleum and natural gas gathering and transportation and long-distance pipeline is developed rapidly, the pH value variable is large, the components of the transportation medium are complex, the corrosivity is strong, and the abrasion loss is large, so that the problem of pipeline corrosion is increasingly prominent.

And the technical quality problems of important safety guarantee such as sudden accidents of the outer wall of the pipeline corroded and cracked by the stress of the soil environment, the deformation of the integral structure of the pipeline and the like.

The Qingdao oil pipeline leaks and suddenly explodes during maintenance. The national chairman Xi jinping issues a significant instruction: "strengthen the safe production measure, put an end to such accidents firmly".

The pipeline manufactured by the existing corrosion inhibitor technology, the internal coating technology and the composite pipe technology is actually made of the material attached to the surface of the inner wall of the steel pipe. In long-term transportation of the oil-gas pipeline, due to dirt accumulation of oil-gas media on the surface of the pipe wall, the oil-gas pipeline needs to be washed and cleaned regularly, oil-gas waste is large, transportation efficiency is low, corrosion resistance and abrasion resistance are poor, mechanical strength is low, safety guarantees such as environmental stress corrosion cracking and deformation of the whole pipeline structure are ensured, and transportation of long-line pipelines of the oil-gas media cannot be met.

In 1990, the enamel pipeline for conveying coal particles from coal mine to power plant is researched by the most authoritative research department in China, the vertical electric heating furnace and the horizontal electric heating furnace are elaborately designed and manufactured, and the automatic temperature control device is correspondingly matched.

The vertical electric heating furnace is not limited by the large diameter and the special length of the pipeline, the collimation degree of the pipeline after firing is ensured, but the glass lining glaze layer on the inner wall of the pipeline is in a flowing state during high-temperature (850-.

The horizontal electric heating furnace has the defects that pipelines are difficult to enter the furnace and difficult to exit the furnace, and the pipeline supporting burning frame is a fire blocking object in the heating furnace, so that the whole glass lining glaze layer is not uniformly heated, and the quality of the burnt glass lining glaze layer is poor; the pipeline and flange surfaces at two ends of the pipeline are large in deformation caused by long-time high-temperature heating for several times, safety and economic benefits of a total installation project are directly related, and the pipeline is not in accordance with the current national standard GB25025-2010 (the diameter of equipment is more than or equal to 1000mm, the maximum and minimum diameter difference is less than or equal to 6mm, and the flatness tolerance is less than or equal to 2 mm); the diameter of the horizontal electric heating furnace needs to be enlarged, and the electric energy consumption is increased; the electric furnace is easily damaged, etc.

Therefore, the vertical and horizontal electric heating furnaces are applied, the manufacture of long pipelines is extremely difficult to break through due to uneven heating temperature of the whole long pipeline, and the whole glass lining glaze layer has serious quality problems and the whole structure of the pipeline and the deformation of flange surfaces at two ends.

The trial production for more than one year is not suitable for long-line pipeline transportation of coal particles, the research of the project is terminated, and the development and manufacture of large glass lining pipelines are not seen for more than 20 years.

Calculated according to 2000 kilometers of a project, if the length of the pipeline is 5 meters, the number of the installation connecting points is 40 ten thousand, and if the length of the pipeline is 25 meters, the number of the installation connecting points can be reduced to 8 ten thousand.

Calculated according to 2000 kilometers of a project, the effective area of the glass lining of the pipeline reaches 600 ten thousand meters²The effective area of the glass lining glaze layer regulated by the technical conditions of glass lining equipment formulated by GB25025-2010 is more than or equal to 89m²And the number of the repaired pinholes is 7, so that the number of the pinholes of the whole engineering pipeline is up to 46 ten thousand. It can be confirmed that: the existence of pinhole defects at each site directly correlates with the safe operation and economic benefits of a super-huge project with total investment up to several billion RMB.

This is the main reason why the suitable oil transportation pipeline must be a large long pipeline and the quality of the whole glass-lined glaze layer must be excellent.

Therefore, the innovation of the electric heating furnace and the reform of the manufacturing technology and process need to comprehensively meet the requirements of pipeline engineering lines and the maximum length (the diameter is more than 1m, and the maximum length can be 25m by welding and combining 2 steel pipes) of steel pipe products, large-sized micro-crystallized glass lining pipelines with different specifications and excellent overall quality are manufactured, so that the installation and connection points among the pipelines of the whole trunk line are reduced, the site construction and installation are facilitated, and the overall quality, the circulation effect and the safe operation of the pipeline engineering are greatly improved.

Disclosure of Invention

The purpose of the invention is: a large-scale micro-crystallization glass lining pipeline and a manufacturing method thereof are developed.

The large-scale micro-crystallization glass lining pipeline forms a silk-screen-shaped strong adherence layer between the interface of metal and glass lining ground coat and the excellent physical and chemical properties of the micro-crystallization glass lining ground coat, and can meet the specific requirements of different oil gas media, or acid resistance, alkali resistance, temperature difference sudden change resistance, wear resistance enhancement, prevention of sudden stress corrosion accidents in soil environment and deformation of the whole structure of the pipeline, adjustment of the formula ratio of microcrystalline and amorphous glass-lined glaze, combination of advanced controlled enameling and sintering 'core technology' sintering process and microcrystallization treatment of glass-lined, and can provide the highest technical quality index of each corresponding physical and chemical performance requirement for each oil and gas pipeline engineering line, especially for different structural parts of the same pipeline by applying, adjusting and formulating, the comprehensive lifting reinforcement ensures the long-term non-corrosion, smooth circulation and safe operation of the whole pipeline.

The large-scale micro-crystallization glass lining pipeline can be welded and combined with an oil gas pipeline with the length of 25m according to the requirements of the existing oil gas pipeline laying engineering and the maximum length of steel pipe manufacture, or two steel pipes (the diameter is 1.0-1.6 m) so as to reduce the installation and connection points between long-line pipelines in the whole process.

The invention provides a large microcrystalline glass lining pipeline, which comprises a straight cylinder pipe body, a large flange and a reinforcing ring body, wherein two ends of the straight cylinder pipe body are flanged to form the large flange, the reinforcing ring body is tightly matched with the periphery of the outer side of the straight cylinder pipe body and welded on the inner side of the large flange, and the inner wall and the outer wall of the straight cylinder pipe body, the large flange and the outer side of the reinforcing ring body are sprayed and fired with a microcrystalline glass lining glaze layer.

Furthermore, the reinforcing ring body with be circumference welding hoop welded joint between the straight stack pipe shaft outside circumference, the reinforcing ring body with be circumference welding hoop welded joint between the big flange.

Furthermore, the large-scale microcrystalline glass lining pipeline also comprises reinforced steel rib plates which are symmetrically distributed along the outer circumference of the straight cylinder pipe body, the reinforced steel rib plates are welded on the outer circumference of the straight cylinder pipe body and are welded with the reinforcing ring body, and microcrystalline glass lining glaze layers are sprayed and sintered on the outer sides of the reinforced steel rib plates. The number of the reinforced steel rib plates can be 9-21.

Furthermore, the large-scale microcrystalline glass lining pipeline also comprises reinforced steel round pipe pieces, the reinforced steel round pipe pieces are symmetrically distributed along the outer side circumference of the straight pipe body and are arranged between the two groups of reinforced steel rib plates, two ends of each reinforced steel round pipe piece are respectively welded with the outer wall of the straight pipe body and the reinforced circular ring body, and a microcrystalline glass lining glaze layer is sprayed and sintered on the outer side of each reinforced steel round pipe piece. The reinforced steel round pipe fitting can be 3-6.

Furthermore, the microcrystalline glass lining glaze layer of the large microcrystalline glass lining pipeline is prepared by a manufacturing method combining an openable and closable extra-long horizontal heating electric furnace and an intelligent temperature program control/regulation/recorder device, wherein the temperature control precision of the intelligent temperature program control/regulation/recorder device is +/-1 ℃, the microcrystalline glass lining glaze layer is combined with the openable and closable extra-long horizontal heating electric furnace, and the process of heating and sintering while rotating is carried out is combined.

Furthermore, the openable and closable extra-long horizontal heating electric furnace comprises a group of fixed horizontal bottom heating electric furnaces in the shape of a semicircular ring body, two groups of openable and closable horizontal heating electric furnaces in the shape of an 1/4 ring body and two groups of circular plane heating electric furnaces; the two groups of the 1/4 circular ring body openable horizontal heating electric furnaces are arranged at the upper part of the semicircular body fixed horizontal bottom heating electric furnace, and the two groups of 1/4 circular ring body openable horizontal heating electric furnaces and the semicircular body fixed horizontal bottom heating electric furnace form a circular ring body in a closed state; the two groups of circular plane heating electric furnaces are arranged at the two ends of the fixed horizontal bottom heating electric furnace which is a semicircular ring body and the two ends of the openable horizontal heating electric furnace which is an 1/4 ring body.

Furthermore, the fixed horizontal bottom heating electric furnace in the shape of a semicircular ring and the two groups of openable horizontal heating electric furnaces in the shape of 1/4 rings form an integral ring horizontal heating electric furnace, which corresponds to the firing of the glass lining glaze layer on the inner wall and the outer wall of the straight barrel pipe body of the large-scale microcrystalline glass lining pipeline and the integral outer structure assembly, and the two groups of circular plane heating electric furnaces correspond to the firing of the glass lining glaze layer on the large flange surfaces at the two ends of the pipeline. The integral structure of the openable and closable extra-long horizontal electric heating furnace is basically consistent with the shape of a pipeline. The integral external structural assembly refers to a pipeline member arranged outside the straight pipe body, such as a reinforced ring body, a reinforced steel rib plate and a reinforced steel round pipe fitting.

Furthermore, the compositions of the microcrystalline glass lining glaze layer on the inner wall of the straight tube body, the microcrystalline glass lining glaze layer on the outer wall of the straight tube body and the integral outer structure assembly and the microcrystalline glass lining glaze layer on the large flange surface at the two ends of the pipeline are different.

The large-scale microcrystalline glass-lined pipeline of the invention combines the advantages that the microcrystalline glass-lined glaze has Mohs hardness of more than 8 grade and can not replace excellent physicochemical properties with the glass-lined glaze, and can be used for regulating microcrystalline glass-lined glaze layers with different formula ratios of microcrystalline state and amorphous glass-lined glaze and different firing temperatures for each oil gas pipeline transmission pipeline project and according to the specific requirements of different physicochemical properties of different structural parts of the same pipeline. The microcrystal glass lining glaze layer is formed on the outer wall of the straight pipe body of the pipeline and the integral outer structure assembly and mainly comprises a microcrystal state for enhancing the anti-seismic mechanical strength; a microcrystalline glass lining glaze layer which takes a microcrystalline state for enhancing mechanical strength as a main body at the deep layer of the inner wall of the pipeline straight-barrel pipe body, and a microcrystalline glass lining glaze layer which takes an amorphous state with corrosion resistance and smooth surface as a main body at the surface layer of the inner wall of the pipeline straight-barrel pipe body; the microcrystal glass lining glaze layer with microcrystal state as main body and greatly raised mechanical strength is used in the large flange of two ends of pipeline to avoid cracking of glass lining glaze layer on the large flange caused by powerful fastening of bolts, and the omnibearing raised reinforcement ensures the long-term no-corrosion, no-wear, smooth circulation and safe operation of large microcrystal glass lining oil-gas pipeline.

The invention provides a manufacturing method of a microcrystal glass lining pipeline, which develops and innovatively opens and closes a very long horizontal electric heating furnace combined with an intelligent temperature program control/regulation/recorder device, the whole modeling structure of the electric furnace is similar to that of a large microcrystal glass lining pipeline, the whole circular ring horizontal electric heating furnace corresponds to the burning of glass lining glaze layers of inner walls and outer walls of straight cylinder pipe bodies of the pipeline and an integral external structural assembly, two groups of circular plane electric heating furnaces correspond to the burning of the glass lining glaze layers on large flange surfaces at two ends of the pipeline, the furnace body temperature measured by a furnace wall thermocouple and the heating temperature of the glass lining surfaces on the large flange surfaces at the inner wall and two ends of the pipeline are explored and positioned by an intelligent controlled temperature control device to form a corresponding fixed temperature difference value, and the new glass lining process of the pipeline is combined with the implementation of heating while rotating in the burning process, the different firing temperatures of the microcrystal glass-lined glaze layers of the pipeline integral microcrystal glass-lined glaze layers on the surfaces of the pipeline straight barrel pipe body and the large flanges at the two ends of the pipeline are accurately controlled, the heating power is respectively and independently regulated and controlled by an intelligent controlled temperature control device, synchronous integral firing is effectively implemented, and the large microcrystal glass-lined pipeline with the integral quality remarkably superior to that of the existing national standard GB25025-2010 is manufactured.

The manufacturing method of the large-scale microcrystalline glass lining pipeline comprises the following steps:

1) manufacturing a pipeline component: respectively manufacturing a straight tube body and a large flange formed by flanging the two ends of the straight tube body;

the pipelines are connected through a circumferential welding joint, the circumferential welding joint carries out X-ray flaw detection according to JB/T4730 to obtain a pipeline component which accords with the safety technical supervision regulation of the pressure vessel, and the thickness of a steel plate of the pipeline component is in accordance with the design and manufacture standard of the pipeline pressure vessel;

2) manufacturing an integral structure of the pipeline: welding a reinforcing ring body on the inner side of the large flange, wherein the reinforcing ring body is tightly matched with the outer circumference of the straight pipe body, a group of circumferential welding joints are circumferentially welded between the reinforcing ring body and the outer circumference of the straight pipe body, and a group of circumferential welding joints are circumferentially welded between the reinforcing ring body and the large flange to form a pipeline component at the position of the reinforcing large flange;

the reinforced ring body ensures that the large flange surface is not deformed in multiple high-temperature sintering, and the thickness of the steel plate can be adjusted and thickened according to the nominal diameter of the pipeline;

3) manufacturing a reinforced steel plate: a plurality of groups of symmetrically distributed reinforced steel rib plates are welded on the outer circumference of the straight cylinder pipe body, and the reinforced steel rib plates are welded with the reinforced ring body;

the number of the reinforced steel rib plates is 9-21, and the reinforced steel rib plates are selected according to the diameter of the pipeline; the reinforcing ring body is combined with 9-21 pairs of symmetrical reinforcing steel rib plates, so that the nominal pressure and the pipe orifice sealing performance of the large pipeline flange can be perfectly improved;

4) manufacturing a reinforced steel round pipe piece: a plurality of groups of reinforced circular steel pipe pieces which are symmetrically distributed and arranged between the two groups of reinforced steel rib plates are welded on the outer side circumference of the straight cylinder pipe body, and two ends of each reinforced circular steel pipe piece are respectively welded with the outer wall of the straight cylinder pipe body and the reinforced circular ring body;

the number of the reinforced steel round pipe fittings is 3-6; the steel round pipe is reinforced so as to greatly improve the deformation resistance of the whole pipeline;

5) spraying glass lining base glaze on the inner wall, the outer wall, the large flange surface, the reinforced ring body, the reinforced steel rib plate and the reinforced steel round pipe fitting (the reinforced ring body, the reinforced steel rib plate and the reinforced steel round pipe fitting are combined into an integral external structural assembly);

6) spraying microcrystalline glass lining overglaze on the inner wall and the outer wall of the straight barrel pipe body, the large flange surface, the reinforced ring body, the reinforced steel rib plate and the reinforced steel round pipe fitting (the reinforced ring body, the reinforced steel rib plate and the reinforced steel round pipe fitting are combined into an integral external structural assembly);

the combination of the microcrystal glass lining overglaze is mixed and ground glaze slip by different formulas and proportions of microcrystal glass lining glaze and amorphous glass lining glaze according to the requirements of each highest technical quality index of specific physicochemical performance of each oil-gas pipeline project;

7) combining an openable and closable extra-long horizontal electric heating furnace with an intelligent temperature program control/regulation/recorder device, combining the implementation of a process of rotating and firing at the same time, firing the pipeline sprayed with the glass lining glaze, controlling the glass lining ground glaze and the microcrystalline glass lining glaze, and synchronously and integrally firing the microcrystalline glass lining glaze and the microcrystalline glass lining glaze at the same heating temperature;

the method applies an intelligent temperature program control/regulation/recorder device and a newly developed and innovative openable and closable extra-long horizontal electric heating furnace, sprays a dried glass lining glaze layer on a pipeline system, implements a controlled enameling firing 'core technology', and enables an optimal and firmest dense layer with a wire mesh structure to be formed between a steel plate and a glass lining ground coat. The foundation is laid for accurately controlling the glass lining bottom glaze and the micro-crystallization glass lining overglaze, and synchronously and integrally firing the micro-crystallization glass lining overglaze and the micro-crystallization glass lining overglaze at the same heating temperature. Various hidden trouble defects are thoroughly eliminated to the maximum extent, and the highest quality index including the pinhole number of 0 is achieved;

the controlled enameling firing 'core technology' refers to a controlled enameling firing process which is implemented in the stages of medium-temperature presintering, high-temperature sintering and heat preservation when the integral enamel glass base glaze of the pipeline is fired. The firing temperature can be between room temperature and 950 ℃, and the total firing time is 5 to 6 hours;

8) repeatedly enameling and burning the pipeline for multiple times by adopting the burning method in the step 7), and spraying glass lining glaze on the pipeline before enameling and burning each time;

the large-scale microcrystal glass lining pipeline adopts an openable and innovative extra-long horizontal electric heating furnace combined with an intelligent temperature program control/regulation/recorder device to repeatedly enamel the glass lining glaze layer of the pipeline for a plurality of times, and the whole pipeline is sprayed, dried and then sintered before each enamel firing;

9) and cooling the finally fired pipeline along with the furnace according to a specific cooling curve.

The specific cooling curve can be converted into a solidified state according to the softening state of the microcrystalline glass lining glaze layer, the temperature is controlled to be 6-8 h, and the glass is slowly cooled to 150 ℃ from the furnace temperature of 650 ℃.

The glass lining ground coat used in the steps 5), 6), 7) and 8) is the conventional glaze slip in the prior art, and the glass lining overglaze containing microcrystal is the glaze slip formed by mixing and grinding microcrystal glass lining glaze and amorphous glass lining glaze in different proportions. Preferably, the glass lining glaze slip can be uniformly sprayed by full-automatic glaze slip spraying equipment.

In the steps 7), 8) and 9), an intelligent temperature program control/regulation/recorder device and a newly developed and innovative openable and closable extra-long horizontal electric heating furnace are applied, the measurement and control precision of the system can reach +/-1 ℃, and the optimal glass lining glaze layer lining and sintering process of the pipeline can be comprehensively and accurately controlled and realized. Strictly following the core technology of controlled enameling firing, accurately controlling the specific temperature of each stage of heating, heat preservation and cooling, executing an enameling firing process curve by a computer, and recording, printing and archiving.

Further, in the step 5), the inner wall and the outer wall of the straight barrel body, the large flange surface, the reinforced annular body, the reinforced steel rib plate and the reinforced steel round pipe piece are sprayed with glass lining ground coat, a controlled enameling burning 'core technology' is executed, the medium-temperature presintering, heat preservation and high-temperature burning can be precisely regulated and controlled, and a dense layer with a firm wire mesh structure is formed between the outer wall of the steel and the glass lining ground coat.

Furthermore, the glass-lined glaze has excellent physicochemical properties, combines the advantages that the microcrystalline glass-lined glaze has the Mohs hardness of more than 8 grade, can be applied and adjusted according to the requirements of specific physicochemical properties of each oil and gas pipeline engineering line, particularly different structural parts of the same pipeline, or acid resistance, alkali resistance, wear resistance, or enhanced shock resistance mechanical strength, and the formula and the mixing proportion of the corresponding microcrystalline and amorphous glass-lined glaze are adjusted, so that the glass-lined glaze specially formulates the first highest technical quality index of smooth circulation, durability, non-corrosion, and all-round promotion enhanced guarantee of operation safety for the whole-line oil and gas pipeline engineering.

Furthermore, the spraying and the firing of the microcrystalline glass-lined glaze taking a microcrystalline state as a main body at the front several deep layers of the inner wall of the straight barrel pipe body are used for greatly enhancing the mechanical strength, and the spraying and the firing of the microcrystalline glass-lined glaze taking an amorphous state as a main body at the rear several surface layers are used for improving the surface smoothness, the corrosion resistance and the abrasion resistance.

Furthermore, the spraying and the sintering of the microcrystalline glass lining glaze which takes the microcrystalline state as the main body for the outer wall of the straight cylinder pipe body, the reinforced ring body, the reinforced steel rib plate and the reinforced steel round pipe piece are carried out so as to improve the corrosion resistance and the shock-resistant mechanical strength.

Furthermore, the spraying and the sintering of the microcrystalline glass lining glaze which takes microcrystalline state as a main body on the large flange surfaces at the two ends of the pipeline are carried out so as to greatly enhance the mechanical strength.

Further, in the step 7), the openable and closable extra-long horizontal electric heating furnace is combined with an intelligent temperature program control/regulation/recorder device, and the openable and closable extra-long horizontal electric heating furnace comprises a group of fixed horizontal bottom electric heating furnaces in the shape of a semicircular ring, two groups of openable and closable horizontal electric heating furnaces in the shape of 1/4 rings and two groups of circular plane electric heating furnaces; the two groups of the 1/4 circular ring body openable horizontal heating electric furnaces are arranged at the upper part of the semicircular body fixed horizontal bottom heating electric furnace, and the two groups of 1/4 circular ring body openable horizontal heating electric furnaces and the semicircular body fixed horizontal bottom heating electric furnace form a circular ring body in a closed state; the two groups of circular plane heating electric furnaces are arranged at the two ends of the fixed horizontal bottom heating electric furnace which is a semicircular ring body and the two ends of the openable horizontal heating electric furnace which is an 1/4 ring body.

Further, the two groups of openable horizontal electric heating furnaces in the form of 1/4 circular rings are selected from any one of the following openable mechanical structure devices:

one of the openable mechanical structure devices:

more than 4 groups of rotary connecting parts are arranged at the bottoms of two ends of the two groups of steel shells of the openable horizontal heating electric furnace in the form of 1/4 circular ring bodies, and more than 4 groups of opening and closing parts are arranged on the two groups of steel shells of the openable horizontal heating electric furnace in the form of 1/4 circular ring bodies;

the second openable mechanical structure device:

and sliding parts are arranged at the horizontal bottoms of the steel shells of the two groups of the openable horizontal heating electric furnaces in the 1/4 circular ring body, and horizontal sliding rails for the sliding parts to horizontally slide are arranged on two sides of the two groups of the openable horizontal heating electric furnaces in the 1/4 circular ring body.

Further, the horizontal electric stove that heats of very long still includes two group's pipeline setting elements, the pipeline setting element set up in circular plane heating electric stove with be between the fixed horizontal bottom heating electric stove of the semicircle ring body, the pipeline setting element includes interior ring, outer ring and multiunit symmetrical round steel bar, interior ring and outer ring are two sets of diameters inequality concentric full steel ring, multiunit symmetrical round steel bar set up in just along circumference symmetric distribution between interior ring and the outer ring. Furthermore, the inner diameter of the inner ring of the pipeline positioning piece is matched and connected with the outer diameter of the large pipeline flange. The pipeline positioning piece is detachable, and the space part formed by the outer circular ring of the pipeline positioning piece and the multiple groups of symmetrical round steel bars can be used as a furnace entering and discharging operation of a large crane hoisting pipeline.

Furthermore, the openable and closable extra-long horizontal electric heating furnace further comprises 4 rotating fixed pulleys, and the 4 rotating fixed pulleys are arranged on two sides of the outer circular ring of the two groups of pipeline positioning pieces. The 4 rotating fixed pulleys are a new firing process for rotating and heating the glass lining glaze layer of the starting pipeline in the firing process. The bearing piece of the rotary fixed pulley is positioned outside the openable and closable horizontal heating electric furnace body, the rotary fixed pulley can be driven by a motor to rotate, and the whole pipeline is driven to rotate through the large pipeline flange, so that a new sintering process of heating while rotating is realized.

Furthermore, the rotating fixed pulley is a cylindrical gear, the openable and closable extra-long horizontal electric heating furnace further comprises 4 cylindrical gears, and the 4 cylindrical gears are arranged on two sides of the outer circular ring of the two groups of pipeline positioning pieces. The bearing piece of the cylindrical gear is positioned outside the openable and closable extra-long horizontal heating electric furnace body, the cylindrical gear can be driven by a motor, and the whole pipeline is driven to rotate through the large pipeline flange, so that a new sintering process capable of rotating and heating at the same time is realized.

Furthermore, two groups of circular plane heating electric furnaces correspond to the firing of the microcrystalline glass lining glaze layer which takes microcrystalline state as a main body on the large flange surfaces at two ends of the pipeline, 4 rotating fixed pulleys which drive two groups of pipeline positioning pieces to rotate and an intelligent temperature program control/regulation/recorder device are driven, the temperature control precision is combined at +/-1 ℃, the requirements of the specific high-standard firing process of microcrystalline glass lining are perfectly met in an all-round way, and the large microcrystalline glass lining oil-gas pipeline which is extra-large, long, excellent in quality and safe in operation is innovatively manufactured.

Furthermore, the fixed horizontal bottom heating electric furnace in the shape of a semicircular ring and the cavity walls of the whole inner cavities of the two groups of openable horizontal heating electric furnaces in the shape of 1/4 rings are provided with concentric-shaft arc-shaped heat-conducting plates made of heat-resistant steel. The concentric-center-shaft arc-shaped heat conducting plate covers the surface layer of the openable and closable extra-long horizontal heating electric furnace, so that the heating uniformity of the integral openable and closable extra-long horizontal heating electric furnace is improved.

Furthermore, the fixed horizontal bottom heating electric furnace in the shape of a semicircular ring and the two openable horizontal heating electric furnaces in the shape of 1/4 rings are combined into an integral ring horizontal heating electric furnace, the integral ring horizontal heating electric furnace is fired corresponding to the inner wall and the outer wall of the straight pipe body of the pipeline and the microcrystalline glass lining glaze layer of the integral outer structure assembly, the two groups of circular plane heating electric furnaces are fired corresponding to the microcrystalline glass lining glaze layer on the large flange surface at the two ends of the pipeline, and the corresponding different microcrystalline glass lining glazes and different firing temperatures can be adjusted according to the requirements of different structural parts of the same pipeline on specific physical and chemical properties and high standard technical quality.

Furthermore, a plurality of 1/2 annular grooves are formed in the inner side semi-peripheral wall of the fixed horizontal bottom heating electric furnace in the semi-annular shape; an electric heating belt is wound in the 1/2 annular groove; a plurality of 1/4 annular grooves are formed in the peripheral wall of the inner side 1/4 of the openable horizontal heating electric furnace in the form of an 1/4 annular body; an electric heating belt is wound in the 1/4 annular groove; the electric heating tapes wound in the 1/2 annular grooves and the electric heating tapes wound in the 1/4 annular grooves are connected in a circumferential manner to form a group of electric heating tapes, and the integral annular horizontal electric heating furnace consists of a plurality of groups of electric heating tapes; a plurality of circles of concentric circular grooves with different diameters are arranged on the circular plane of the circular plane heating electric furnace; a group of electric heating strips are wound in the concentric circular grooves; each group of electric heating tapes is respectively connected with a temperature control system, and the temperature control system comprises a group of thermocouples and an intelligent temperature program control/regulation/recorder device. The two large temperature control systems combined by the integral annular horizontal electric heating furnace and the two groups of circular plane electric heating furnaces can respectively regulate and control the heating power, and accurately implement the synchronous integral firing of the integral microcrystalline glass lining glaze layer of the same pipeline by accurately implementing the different firing temperatures of the microcrystalline glass lining glaze layers with different structural parts of the pipeline and the same firing temperature of the same microcrystalline glass lining glaze layer with the same structural part.

Furthermore, the group of thermocouples is matched with the group of electric heating strips, is arranged in a heating area of the group of electric heating strips and is used for detecting the heating temperature of the pipeline micro-crystallization glass lining glaze layer in the heating area of the electric heating strips and sending a temperature signal; the intelligent temperature program control/regulation/recorder device is arranged outside the openable and closable extra-long horizontal heating electric furnace, is connected with a group of electric heating belts matched with the group of thermocouples, and executes automatic printing, recording, archiving and quality tracking in the sintering process.

Furthermore, the integral horizontal circular ring-shaped electric heating furnace and the two groups of circular plane electric heating furnaces are combined into two large temperature control systems, a group of electric heating belts and a group of corresponding thermocouples are respectively and independently connected, the two large temperature control systems are respectively combined with the intelligent temperature program control/regulation/recorder device to respectively and independently regulate and control the heating power, set the temperature control precision to +/-1 ℃, accurately implement different structural parts of the pipeline, different firing temperatures of the microcrystal glass lining glaze layers with different compositions, and synchronously and integrally fire the integral microcrystal glass lining glaze layer with different compositions in the same pipeline.

The intelligent temperature program control/regulation/recorder device stores a preset temperature or temperature control curve and is used for receiving a temperature signal of the thermocouple and regulating and controlling the heating temperature of the electric heating belt after comparing the temperature signal with the preset temperature or temperature control curve.

Because each group of electric heating strips can be independently matched with the temperature control system, the heating power of each group of electric heating strips can be independently regulated and controlled. The intelligent temperature program control/regulation/recorder device can accurately realize temperature presetting, temperature control and automatic recording.

One of the characteristics of the openable and closable extra-long horizontal electric heating furnace is as follows: including a set of fixed horizontal bottom electric heater that is the semicircle torus, two groups be horizontal electric heater, two groups of planes of heating of can opening and shutting that 1/4 tourus, two groups of planes of heating electric heater, two groups be the horizontal electric heater that can open and shut that 1/4 tourus set up in be the upper portion of the fixed horizontal bottom electric heater of semicircle torus, two groups of planes of heating electric heater set up in be the fixed horizontal bottom electric heater of semicircle torus with two groups are the both ends of the horizontal electric heater that can open and shut of 1/4 tourus. Further, more than 4 groups of rotary connecting parts are arranged at the bottoms of two ends of the openable horizontal heating electric furnace steel shell of the two groups of 1/4 ring bodies, more than 4 groups of opening and closing parts are arranged on the two groups of 1/4 ring bodies of the openable horizontal heating electric furnace steel shell, and the opening and closing of the openable horizontal heating electric furnace of the two groups of 1/4 ring bodies are executed; or, sliding parts are arranged at the horizontal bottoms of the steel shells of the two groups of the openable horizontal heating electric furnaces with 1/4 circular ring bodies, horizontal sliding rails for the sliding parts to horizontally slide are arranged on two sides of the two groups of the openable horizontal heating electric furnaces with 1/4 circular ring bodies, and the opening and closing of the two groups of the openable horizontal heating electric furnaces with 1/4 circular ring bodies are executed.

The second characteristic of the openable and closable extra-long horizontal electric heating furnace is that: the fixed horizontal bottom heating electric furnace that is the semicircle ring body and the two group are the chamber wall of the whole inner chamber of the horizontal heating electric furnace that can open and shut of 1/4 ring bodies are equipped with the concentric shaft arc heat-conducting plate of making by heat-resistant steel, concentric shaft arc heat-conducting plate compound cover in the top layer of the horizontal heating electric furnace that can open and shut of specialty to perfect the even that generates heat that promotes whole heating electric furnace. The intelligent temperature program control/regulation/recorder device is combined and applied to greatly improve the integral quality of the large microcrystalline glass-lined pipeline which is integrally fired at the same heating temperature of the microcrystalline glass-lined glaze layers on the inner wall and the outer wall of the straight-barrel pipe body synchronously.

The third characteristic of the openable and closable extra-long horizontal electric heating furnace is as follows: two groups of circular plane heating electric furnaces and intelligent temperature program control/regulation/recorder devices are arranged at two ends of the fixed horizontal bottom heating electric furnace in the shape of the semicircular ring and the two groups of openable horizontal heating electric furnaces in the shape of 1/4 rings so as to control the same heating temperature of the microcrystalline glass lining glaze on the large flange surfaces at two ends of the pipeline and synchronously and integrally fire the microcrystalline glass lining glaze.

The integral structure of the openable and closable extra-long horizontal electric heating furnace is matched with the integral structure of the pipeline in a consistent manner, and the integral annular horizontal electric heating furnace (a group of fixed horizontal bottom electric heating furnaces in a semicircular ring shape and two groups of openable and closable horizontal electric heating furnaces in an 1/4 annular body are combined) and the two side circular plane electric heating furnaces respectively correspond to a straight cylinder pipe body of the pipeline and a microcrystalline glass lining glaze layer of a large flange face with two flanged ends.

The intelligent temperature program control/regulation/recorder device and the openable and closable extra-long horizontal electric heating furnace have the system temperature control precision of +/-1 ℃, scientifically and accurately comprehensively implement the core technology of medium-temperature presintering, high-temperature firing, heat preservation and staged controlled enameling firing, can strictly follow the physical and chemical reaction of steel, firmly combine the steel with a glass lining bottom glaze, the glass lining bottom glaze with a microcrystalline glass lining surface glaze, and the microcrystalline glass lining surface glaze with the microcrystalline glass lining surface glaze, are compact and smooth, completely eradicate various defects in a glass lining layer to the greatest extent, including the highest quality index with the number of pinholes of 0, and greatly improve the overall quality and safe operation of a large microcrystalline glass lining pipeline.

In general, the beneficial effects of the invention are as follows:

the invention belongs to a special pipeline for long-line transportation of large-scale micro-crystallized glass lining oil gas, which has the advantages of strong corrosion resistance, strong abrasion resistance, smooth surface, smooth circulation, no deformation of a structural part of the whole pipeline, strong shock resistance, play of an important role which can not be replaced by any existing oil gas pipeline part, guarantee of few installation connecting points of pipeline engineering, good sealing performance, long length, durability, no corrosion, smooth circulation, excellent quality and safe operation.

The design of each structural part of the large-scale microcrystalline glass lining pipeline can design and manufacture the integral structural part of the pipeline according to the basic regulation of TSGD0001-2009 pressure pipeline safety technology supervision regulations-industrial pipeline. The pipeline integral structural member further comprises a plurality of groups of symmetrical reinforcing steel bar plates, the plurality of groups of symmetrical reinforcing steel bar plates are arranged on the outer walls of the reinforcing ring body and the pipeline and are formed by symmetrically welding a plurality of groups of reinforcing steel bar plates along the circumference of the outer wall of the pipeline, so that the nominal pressure and the sealing performance of the large flange surface of the pipeline are remarkably improved. Further pipeline structure spare, still include several groups of whole symmetry reinforcing steel pipe spares, set up in two big flange face reinforcing ring bodies in pipeline to be located between the multiunit symmetry stiffened steel gusset, be the whole symmetrical welding of axial with the outer wall of pipeline and form, in order to show the nominal pressure that promotes two big flange faces in pipeline and the anti indeformable performance of whole pipeline. The integral pipeline structural member can ensure that the integral pipeline structural member is never deformed after being sintered at high temperature for many times so as to perfectly improve the nominal pressure and the sealing performance of the large flange surface, and the integral pipeline is never deformed so as to improve the mechanical strength and the safe operation of the enhanced anti-seismic performance.

The glass lining has excellent physical and chemical properties, combines the advantages that the Mohs hardness of a microcrystalline glass lining layer is higher than 8 grades, and is a dielectric material for manufacturing oil and gas pipelines, wherein the combination of the current discipline technology and a pipeline iron blank is an irreplaceable, unique, most ideal and perfect material dielectric composite layer. The inner wall surface of the pipeline is ensured to be durable and not corroded or abraded; the inner wall deep layer and the large flange surfaces at two ends of the pipeline have extremely strong shock-resistant mechanical strength; the outer wall of the pipeline is not corroded and peeled; the whole pipeline structure is not deformed and has extremely strong shock-resistant mechanical strength. Ensure that the large-scale micro-crystallization glass lining pipeline is durable, non-corrosive, non-abrasive, smooth in circulation and safe in operation.

The large-scale microcrystal glass-lined pipeline takes smooth circulation, long-time non-corrosion and safe operation as a first technical quality index, can be used for solving the specific requirements of different structural parts of each oil and gas pipeline engineering line, particularly the same pipeline, on acid resistance, alkali resistance, wear resistance improvement or earthquake resistance mechanical strength, and can adjust and establish different formula ratios and different firing temperatures of microcrystal glass-lined glazes with the highest technical quality indexes corresponding to various physical and chemical performance requirements. The method successfully breaks through the problems that the components of an oil and gas conveying medium are complex, the pH value changes greatly, the trend of more serious corrosion is faced, the cracking of soil environment stress corrosion, the anti-seismic mechanical strength is poor, the whole pipeline deforms, the faced pipeline is seriously corroded, and the operation of safety guarantee is increasingly prominent.

The large-scale microcrystalline glass-lined pipeline of the invention, with the irreplaceable excellent physicochemical properties of glass-lined glaze, combines the advantages that the microcrystalline glass-lined glaze has Mohs hardness of more than 8 grades, can be for the specific demand of each oil gas pipeline project, the application adjusts the mixing proportion of the different proportions of corresponding microcrystalline and amorphous glass-lined, the different firing temperatures, further the microcrystalline glass-lined glaze layer which is fired can be sprayed on the deep layer of the inner wall of the same pipeline and takes the microcrystalline state with enhanced mechanical strength as the main body, and the microcrystalline glass-lined glaze layer which takes the amorphous state with corrosion resistance, wear resistance and smooth surface as the main body can be sprayed on the surface layer of the inner wall of the pipeline; the outer wall of the pipeline can be sprayed with a sintered microcrystalline glass lining glaze layer which takes the shock-resistant mechanical strength and the corrosion-resistant microcrystalline state as the main body; the microcrystal glass-lined glaze layer which takes microcrystal state with greatly enhanced mechanical strength as a main body can be sprayed and fired on the large flange surfaces at two ends of the pipeline, and the microcrystal glass-lined glaze layer on the large flange surfaces is broken in order to avoid the situation that bolts are strongly fastened, and the whole-line large microcrystal glass-lined oil-gas pipeline is not corroded, is not abraded, is smoothly circulated and is safely operated in an all-around enhancing mode.

The innovative technical core and major breakthrough of the invention are a group of openable and closable extra-long horizontal heating electric furnaces, and a new firing process of rotating and heating the microcrystalline glass lining glaze of the pipeline in the heating and firing process is combined to manufacture the large microcrystalline glass lining pipeline with the diameter of more than 1m and the length of more than 25m and excellent quality. The pipeline is fed into and discharged from the furnace, two large traveling cranes synchronously operate, only two groups of openable horizontal electric heating furnaces which are 1/4 circular ring bodies on the upper part need to be opened, one traveling crane is firstly used for hoisting the heated and sintered glass lining pipeline out of the electric furnace, the latter traveling crane hoists the glass lining pipeline to be heated and sintered into the electric furnace, and finally the horizontal electric heating furnace is closed, so that the operation is convenient and efficient. Can be called as a unique, irreplaceable and effective high-efficiency electric heating furnace, which is a great breakthrough in the development history of the glass lining industry.

The invention applies, develops and innovates an openable and closable extra-long horizontal electric heating furnace, combines with each group of electric heating strips, and an intelligent temperature program/regulation/recorder connected with a group of thermocouples can independently regulate and control the heating power, the microcrystallized glass lining glaze layer of the pipeline slowly rotates in the sintering process, the temperature control precision of the system is +/-1 ℃, so that the different sintering temperatures of different combined microcrystallized glass lining glazes at different structural parts of the same pipeline and the same sintering temperature of the same combined microcrystallized glass lining glaze at the same structural part are implemented to the maximum extent, and the integral microcrystallized glass lining glaze layer of the same pipeline is synchronously and integrally sintered. The novel process of the controlled enameling burning 'core technology' is combined, various hidden danger defects such as hidden bubbles, cracks, ceramic flow, ceramic explosion and the like in an enamel glass layer are thoroughly eliminated to the maximum extent, the highest quality index with the number of needle holes being 0 is deeply developed, the overall quality of a large-scale microcrystalline enamel glass pipeline is greatly improved, the service life of a product is remarkably prolonged, the safe operation is realized, and the novel process belongs to a major breakthrough in the development history of the enamel glass industry.

The openable horizontal heating electric furnace is characterized in that: two groups of mechanical devices which are 1/4 circular ring bodies or movably open and close or rotatably open and close the electric heating furnace are arranged, so that the difficult problem of the operation of the feeding and discharging of the extra-large and extra-long glass lining pipeline is successfully solved, and two important breakthroughs for the extension are made; the second characteristic is that: the integral ring body heating electric furnace which is formed by combining a group of fixed horizontal bottom heating electric furnaces in a semicircular ring body shape and two groups of openable horizontal heating electric furnaces in an 1/4 ring body shape corresponds to the firing of the integral microcrystalline glass lining glaze layer of the straight cylinder body of the pipeline; two groups of circular plane electric furnaces are corresponding to the firing of the microcrystallized glass lining glaze layers on the large flange surfaces at two ends of the pipeline, so that the firing temperatures of different combined microcrystallized glass lining glaze layers with different physicochemical properties and different specific requirements of different structural parts of the same pipeline are precisely realized; the third characteristic is that: 4 rotating fixed pulleys capable of starting self positioning pieces at two ends of the pipeline to slowly rotate are arranged at the bottom of an inner cavity of the heating electric furnace, so that the whole pipeline and the flange surfaces at the two ends are perfectly ensured not to deform, and the whole microcrystal glass lining surface of the pipeline is uniformly heated. In particular to a glass lining glaze layer which is arranged on the large flange surfaces at two ends of a pipeline and takes a microcrystal state as a main body, and since the invention of the glass lining glass, the glass lining glaze is easy to flow due to small sintering temperature range, and is extremely difficult to manufacture a large piece of glass lining equipment. The two major advantages of the heating furnace can be comprehensively opened and closed, a high-precision temperature control system and a new process of rotating and sintering while being implemented can meet the requirements of a specific high-standard sintering process of microcrystalline glass-lined glaze in an all-round and perfect manner, the mechanical strength and the thermal property can be enhanced exponentially for updating and applying the microcrystalline glass-lined glass, and the microcrystalline glass-lined glass combined with the excellent physical and chemical properties of amorphous high-silica glass-lined glass is combined, so that a new generation of large-scale microcrystalline glass-lined equipment is created and manufactured, the great revolution of the current glass-lined industry is strongly promoted, and the heating furnace is an extra-long horizontal heating furnace which can be opened and closed, and a unique and irreplaceable major breakthrough is achieved for developing and manufacturing extra-long and microcrystalline glass-lined pipelines with excellent quality and safe operation.

The manufacture of large-scale micro-crystallization glass lining pipeline is characterized in that: various corresponding technical quality indexes can be designed and established for the specific requirements of different physical and chemical properties, acid resistance, alkali resistance, wear resistance improvement or earthquake-resistant mechanical strength enhancement of each oil and gas pipeline project. The method is comprehensively suitable for the technical quality problems of high safety operation of the pipeline caused by complex components, large change of pH value and serious corrosion and cracking of soil environmental stress in the current oil exploitation medium. The second characteristic is that: the formula and the proportion of different microcrystalline glass-lined glaze can be adjusted for the specific requirements of different physical and chemical properties of different structural parts of the same pipeline, microcrystalline glass-lined glaze which takes a microcrystalline state with enhanced mechanical strength as a main body is applied to the deep layer of the inner wall of the pipeline, and microcrystalline glass-lined glaze which takes an amorphous state with corrosion resistance, wear resistance and smooth surface as a main body is applied to the surface layer of the inner wall. The microcrystalline glass-lined glaze mainly adopts the microcrystalline state with shock resistance mechanical strength and corrosion resistance on the outer wall of the pipeline, and the microcrystalline glass-lined glaze mainly adopts the microcrystalline state with greatly enhanced mechanical strength on the flange surfaces at two ends of the pipeline. The third characteristic is that: the glass-lined glaze is widely applied and manufactured by virtue of excellent physicochemical properties, and chemical and pharmaceutical container equipment is the only, perfect and most ideal composite dielectric material on the surface layer of the iron tire of the pipeline at present, and the microcrystal glass-lined glaze is combined with the advantage that the Mohs hardness of the microcrystal glass-lined glaze is up to more than 8 grade, so that the pipeline can be ensured to be durable, non-corrosive, non-abrasive, smooth in surface, smooth in circulation, strong in shock resistance and mechanical property and safe in operation. Particularly, the development of large-scale microcrystal glass lining oil gas pipeline engineering calculates according to 2000 kilometers of each engineering and the length of each pipeline is 25m, and the flange face connecting point is 80000. The realization and the guarantee of the mechanical strength and quality indexes of the glass lining of the flange surface of each pipeline are directly related to the safe operation of the oil-gas pipeline. The method is characterized in that: the manufacturing of large-scale microcrystal glass lining pipeline combines the temperature control precision of an intelligent temperature program control/regulation/recording device system to be +/-1 ℃, the heating power can be respectively and independently regulated, the different firing temperatures of different combined microcrystal glass lining glaze layers of different structural parts of the pipeline and the same firing temperature of the same combined microcrystal glass lining glaze layer of the same structural part are accurately implemented, and the integral microcrystal glass lining glaze layer of the same pipeline is synchronously and integrally fired. By combining the implementation of a controlled enameling burning 'core technology', various hidden danger defects such as hidden bubbles, cracks, ceramic flow, ceramic explosion and the like in the enamel layer of the enamel glass are thoroughly eliminated to the maximum extent. The method is detected according to the specified standard of a new standard GB25025-2010 glass lining equipment technical condition formulated in China, and the maximum quality index of the large flange surface of the pipeline without deformation and the number of pinholes of a glass lining glaze layer of 0 is ensured to be deeply developed. The method is characterized by comprising the following five steps: according to the technical quality indexes established by the current GB25025-2010 glass lining equipment technical condition in China as standards, an inventor introduces microcrystalline glass lining glaze which can greatly improve mechanical strength and thermal performance according to the requirement of specific physicochemical performance of oil and gas pipeline engineering, draws the glass lining pipeline technical condition and takes the greatly enhanced anti-seismic mechanical strength as the physicochemical performance under the standard of the highest quality index, and the glass lining pipeline technical condition comprises new indexes that a pipeline large flange is not deformed and the number of needle holes of a glass lining glaze layer is 0. The method ensures that the pipeline has the advantages of durability, no corrosion, no abrasion, smooth surface, smooth circulation, high anti-seismic mechanical strength and all-round safe operation, comprehensively replaces various existing pipelines which are seriously corroded in early construction, and safely and efficiently promotes the large-scale microcrystalline glass-lined pipeline manufactured by China to be developed into the first country in the world.

Drawings

FIG. 1 is a schematic view of a microcrystalline glass-lined glaze layer of a large microcrystalline glass-lined pipe;

FIG. 2 is a schematic view of the overall structure of a large-sized micro-crystallized glass-lined pipe;

fig. 2a1 is a schematic diagram of a welding structure of a reinforcing ring body 2a, a plurality of groups of symmetrical reinforcing steel rib plates 2B and a plurality of groups of reinforcing steel circular tube pieces 2c on a large flange 2B in a circumferential symmetrical combination manner;

FIG. 2a2 is a schematic view of a large flange 2B and two sets of reinforcing rings 2a welded together in a circular manner along the circumference of the outer wall of the pipeline;

FIG. 2a3 is a schematic diagram of a symmetrical and evenly distributed welding structure of a plurality of groups of symmetrical reinforcing steel rib plates 2b on two end reinforcing circular ring bodies 2a of a large flange respectively;

FIG. 2a4 is a schematic view of the overall welding structure of a plurality of reinforced steel circular pipe members 2c and a pipeline two-end reinforced circular ring body 2a axially distributed along the outer wall of the pipeline and among a plurality of reinforced steel rib plates 2 b;

fig. 2a5 is a partially enlarged schematic view of a circumferential welding joint between the reinforcing torus 2a and the outer circumference of the straight pipe body 2, and a circumferential welding joint between the reinforcing torus 2a and the large flange 2B;

FIG. 3 is a schematic view of the whole structure of an openable and closable horizontal electric heating furnace;

FIG. 3A is a schematic view of an openable and closable structure of two groups of openable and closable horizontal electric heating furnaces in the form of 1/4 circular rings;

FIG. 3A1 is a schematic view of a combination structure of a fixed horizontal bottom heating electric furnace and two sets of circular plane heating electric furnaces in the shape of a semicircular ring and four rotating fixed pulleys for starting the two-end pipe positioning piece to rotate slowly;

FIG. 3B is a schematic view of one of the openable horizontal electric furnace constructed by combining a rotary connecting member with an opening/closing member;

FIG. 3C is a schematic view of a second structure of an openable horizontal electric furnace, which is composed of a sliding member and a horizontal sliding rail;

FIG. 4 is a schematic view of a structure of a large-sized micro-crystallized glass lining pipeline which is discharged from and enters a furnace in the process of firing in an openable and closable extra-long horizontal electric heating furnace and is combined by a rotary connecting part and an opening and closing part;

FIG. 4A is a schematic view of the whole structure of a large-sized microcrystalline glass-lined pipe fired in an openable extra-long horizontal electric heating furnace;

FIG. 5 is a schematic structural view of a pipeline microcrystalline glass-lined glaze layer which is combined with two sets of pipeline positioning pieces hoisted into a horizontal electric heating furnace in the firing process, is tightly connected with a pipeline and is arranged on 4 rotating fixed pulleys;

FIG. 5A is a schematic view showing the connection between two sets of pipe concentric circle pipe positioning pieces and pipes themselves, which are hoisted into a horizontal electric heating furnace in combination during the firing process of the pipe micro-crystallized glass lining glaze;

FIG. 5B is a schematic view of a partial structure of a pipeline micro-crystallized glass lining glaze layer which is combined with two sets of pipeline positioning pieces hoisted into a horizontal electric heating furnace and tightly connected with a pipeline large flange in the firing process;

fig. 6 is a schematic diagram of the structure of the intelligent temperature program control/regulation/recorder device (PID) and thermocouple combination, i.e. temperature control system.

Reference numerals:

1: large-scale microcrystallized glass-lined pipes;

1 a: microcrystallizing a glass lining glaze layer;

1a 1: micro-crystallizing a glass lining glaze layer on the inner wall of the pipeline;

1a 2: the large flange surface of the pipeline is micro-crystallized with a glass lining glaze layer;

1a 3: the pipeline outer wall and the pipeline integral outer structure assembly are micritized with a glass lining glaze layer;

2: a straight tube body;

2A: the inner wall of the straight tube body;

2B: a large flange;

2B 1-2B 3, 2B 5-2B 7, 2B 9-2B 11: a connecting hole of the large flange surface of the pipeline;

2B4, 2B8, 2B 12: bolt holes on the large flange surface of the pipeline;

2C: the outer wall of the straight tube body;

2C 1: an integral external structural assembly;

2 a: a reinforcing torus;

2b, 2b 1-2 b 9: reinforcing steel rib plates;

2c, 2c 1-2 c 3: reinforcing the steel round pipe piece;

2 e: circumferentially welding a joint;

3.1: a group of fixed horizontal bottom heating electric furnaces in the shape of semicircular rings;

3.2: two groups of openable horizontal heating electric furnaces in the shape of 1/4 circular ring bodies;

3.3: the circular plane heating electric furnaces are fixed at two ends of the integral annular horizontal heating electric furnace;

3.4: the integral torus horizontal electric heating furnace is formed by combining a fixed horizontal bottom electric heating furnace 3.1 which is a semicircular torus and two groups of openable horizontal electric heating furnaces 3.2 which are 1/4 torus;

3.5: the two sides of the pipeline micro-crystallization glass lining glaze layer are driven to slowly rotate in the firing process by 4 rotating fixed pulleys, and the bearing parts of the rotating fixed pulleys are positioned outside the furnace body of the openable and closable extra-long horizontal heating electric furnace;

3a1, 3a2, 3a 3: a layer of refractory material;

3b1, 3b2, 3b 3: an electric heating tape;

3 c: a thermocouple;

3c1, 3c2, 3c 3: a thermocouple;

3d1, 3d2, 3d 3: a heat insulating material layer of the electric heating furnace;

3e1, 3e 2: a concentric-axis arc-shaped heat-conducting plate;

3B1, a rotating connecting part;

3B2 opening and closing component;

3C1 sliding part;

3C2 horizontal slide rail;

5, pipeline positioning parts;

5.1, an inner circular ring of the pipeline positioning piece;

5.2: an outer collar of the pipe positioner;

5.3: a plurality of groups of symmetrical round steel bars;

5.4: three connecting steel plates;

6.1: intelligent temperature program control/regulation/recorder device (PID).

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.

The large microcrystallized glass-lined pipeline 1 as shown in fig. 1 and 2 comprises a straight pipe body 2, a large flange 2B and a reinforced ring body 2A, wherein two ends of the straight pipe body 2 are turned over to form the large flange 2B, the reinforced ring body 2A is tightly matched with the outer circumference of the straight pipe body 2 and welded on the inner side of the large flange 2B, and a microcrystallized glass-lined glaze layer 1a is formed by spraying and sintering the inner wall 2A and the outer wall 2C of the straight pipe body 2, the outer side of the large flange 2B and the outer side of the reinforced ring body 2A.

As shown in fig. 2a1, fig. 2a2 and fig. 2a5, a circumferential welding joint 2e is formed between the reinforcing ring body 2a and the outer circumference of the straight pipe barrel 2, and a circumferential welding joint 2e is formed between the reinforcing ring body 2a and the large flange 2B.

As shown in fig. 2a1 and 2a3, the large microcrystalline glass lined pipeline further comprises reinforced steel rib plates 2b, the reinforced steel rib plates 2b are symmetrically distributed along the outer circumference of the straight-barrel pipe body 2, the reinforced steel rib plates 2b are welded to the outer circumference of the straight-barrel pipe body 2 and are welded with the reinforcing ring body 2a, and microcrystalline glass lined glaze layers 1a3 are sprayed and sintered on the outer sides of the reinforced steel rib plates 2 b. The number of the reinforced steel rib plates can be 9-21, and fig. 2a1 shows that the number of the reinforced steel rib plates is 9: 2b 1-2 b 9.

As shown in fig. 2a1 and 2a4, the large microcrystalline glass-lined pipeline further comprises reinforced steel round pipe pieces 2C, the reinforced steel round pipe pieces 2C are symmetrically distributed along the outer circumference of the straight pipe body 2 and are arranged between two groups of reinforced steel rib plates, two ends of each reinforced steel round pipe piece 2C are respectively welded with the outer wall 2C of the straight pipe body and a reinforced ring body 2a, and the outer side of each reinforced steel round pipe piece 2C is sprayed and sintered to form a microcrystalline glass-lined glaze layer 1a 3. The reinforcing steel round pipe fitting can be 3 ~ 6, and figure 2a1 shows reinforcing steel round pipe fitting totally 3: 2c1, 2c2 and 2c 3.

The development and manufacturing application of the large-sized micro-crystallization glass lining pipeline is a manufacturing method combining an openable and closable extra-long horizontal heating electric furnace and an intelligent temperature program control/regulation/recorder device, the temperature control precision of the intelligent temperature program control/regulation/recorder device is +/-1 ℃, the large-sized micro-crystallization glass lining pipeline is combined with the openable and closable extra-long horizontal heating electric furnace, and the heating and sintering process is carried out while rotating.

The openable and closable extra-long horizontal electric heating furnace comprises a group of fixed horizontal bottom electric heating furnaces 3.1 in the shape of semicircular rings, two groups of openable and closable horizontal electric heating furnaces 3.2 in the shape of 1/4 circular rings and two groups of circular plane electric heating furnaces 3.3; the two groups of 1/4 circular ring bodies of openable horizontal heating electric furnaces 3.2 are arranged at the upper part of the semi-circular ring bodies of fixed horizontal bottom heating electric furnace 3.1, and the two groups of 1/4 circular ring bodies of openable horizontal heating electric furnaces 3.2 and the semi-circular ring bodies of fixed horizontal bottom heating electric furnace 3.1 form circular ring bodies in a closed state; the two groups of circular plane heating electric furnaces 3.3 are arranged at two ends of the fixed horizontal bottom heating electric furnace 3.1 which is a semicircular ring body and the two groups of openable horizontal heating electric furnaces 3.2 which are 1/4 ring bodies.

The firing of the integral circular ring horizontal heating electric furnace 3.4 combined by the fixed horizontal bottom heating electric furnace 3.1 in the shape of a semicircular ring and the two openable horizontal heating electric furnaces 3.2 in the shape of 1/4 circular rings corresponds to the firing of the inner wall 2A and the outer wall 2C of the straight barrel pipe body 2 of the large-sized micro-crystallization glass lining pipeline and the integral outer structure assembly 2C1 micro-crystallization glass lining glaze layers 1a1 and 1a3, and the two groups of circular plane heating electric furnaces 3.3 correspond to the firing of the micro-crystallization glass lining glaze layers 1a2 on the surface of the large flange 2B at the two ends of the pipeline.

The compositions of the microcrystalline glass-lined glaze layer 1a1 on the inner wall 2A of the straight-barrel pipe body, the microcrystalline glass-lined glaze layer 1a3 on the outer wall 2C of the straight-barrel pipe body, the integral outer structure assembly 2C1 and the microcrystalline glass-lined glaze layer 1a2 on the surface of the large flange 2B at the two ends of the pipeline are different. The large-scale microcrystalline glass-lined pipeline of the invention combines the advantages that the microcrystalline glass-lined glaze has Mohs hardness of more than 8 grade and can not replace excellent physicochemical properties with the glass-lined glaze, and can be used for regulating microcrystalline glass-lined glaze layers with different formula ratios of microcrystalline state and amorphous glass-lined glaze and different firing temperatures for each oil gas pipeline transmission pipeline project and according to the specific requirements of different physicochemical properties of different structural parts of the same pipeline. A microcrystalline glass lining glaze layer 1a3 which is mainly composed of microcrystalline crystals for enhancing the shock-resistant mechanical strength and is arranged on the outer wall 2C of the pipeline straight barrel pipe body 2 and the integral outer structure assembly 2C 1; a microcrystalline glass lining glaze layer 1a1 mainly composed of microcrystalline state for enhancing mechanical strength at the deep layer of the inner wall 2A of the pipeline straight barrel pipe body 2, and a microcrystalline glass lining glaze layer 1a1 mainly composed of amorphous state for corrosion resistance and smooth surface at the surface layer of the inner wall 2A of the pipeline straight barrel pipe body 2; the microcrystal glass lining glaze layer 1a2 mainly comprises microcrystal state which greatly enhances mechanical strength on the surface of the large flange 2B at two ends of the pipeline is used for avoiding the breakage of the glass lining glaze layer on the surface of the large flange caused by the forceful fastening of bolts, ensuring the whole-line large microcrystal glass lining oil-gas pipeline to be durable, non-corrosive, non-abrasive, smooth in circulation and safe in operation by omnibearing lifting and enhancing, and creating the large microcrystal glass lining pipeline mainly comprising the microcrystal state.

The manufacturing method of the large-scale micro-crystallization glass lining pipeline comprises the following steps:

1) manufacturing a pipeline component: respectively manufacturing a straight tube body 2 and a large flange 2B formed by flanging the two ends of the straight tube body;

the steel pipes among the pipeline iron blanks are welded through a circumferential welding joint, the circumferential welding joint is subjected to X-ray flaw detection according to JB/T4730 to obtain a pipeline component which accords with the safety technical supervision regulation of the pressure vessel, and the thickness of a steel plate of the pipeline component is in accordance with the design and manufacture standard of the pipeline pressure vessel;

2) manufacturing an integral structure of the pipeline: welding a reinforcing ring body 2a on the inner side of the large flange, wherein the reinforcing ring body 2a is tightly matched with the outer circumference of the straight pipe body 2, a group of circumferential welding joints are circumferentially welded between the reinforcing ring body 2a and the outer circumference of the straight pipe body 2, and a group of circumferential welding joints are circumferentially welded between the reinforcing ring body 2a and the large flange 2B to form a pipeline component with an integral structure;

the reinforced ring body ensures that the large flange surface is not deformed in multiple high-temperature sintering, and the thickness of the steel plate can be adjusted and thickened according to the nominal diameter of the pipeline;

3) manufacturing a reinforced steel plate: a plurality of groups of symmetrically distributed reinforced steel rib plates 2b are welded on the outer side circumference of the straight cylinder pipe body 2, and the reinforced steel rib plates 2b are welded with the reinforced circular ring body 2 a;

the number of the reinforced steel rib plates is 9-21, and the reinforced steel rib plates are selected according to the diameter of the pipeline; the reinforcing ring body is combined with 9-21 pairs of symmetrical reinforcing steel rib plates, so that the nominal pressure and the pipe orifice sealing performance of the large pipeline flange can be perfectly improved;

4) manufacturing a reinforced steel round pipe piece: a plurality of groups of reinforced steel round pipe pieces 2C which are symmetrically distributed and arranged in the middle of two groups of reinforced steel rib plates 2b are welded on the outer side circumference of the straight cylindrical pipe body 2, and two ends of each reinforced steel round pipe piece 2C are respectively welded with the outer wall 2C of the straight cylindrical pipe body and a reinforced ring body 2 a;

the number of the reinforced steel round pipe fittings is 3-6; the steel round pipe is reinforced so as to greatly improve the deformation resistance of the whole pipeline;

5) spraying glass lining bottom glaze on the inner wall 2A, the outer wall 2C, the large flange 2B surface, the reinforced annular body 2A, the reinforced steel rib plate 2B and the reinforced steel circular pipe piece 2C (the reinforced annular body, the reinforced steel rib plate and the reinforced steel circular pipe piece can be called as an integral outer structure assembly 2C1) of the straight barrel pipe body 2;

6) spraying microcrystalline glass lining overglaze on the inner wall 2A, the outer wall 2C, the large flange 2B surface, the reinforced annular body 2A, the reinforced steel rib plate 2B and the reinforced steel circular tube piece 2C of the straight tube body 2;

the combination of the microcrystal glass lining overglaze is mixed and ground glaze slip by different proportions of microcrystal glass lining glaze and amorphous glass lining glaze according to the requirements of each highest technical quality index of specific physicochemical performance of each oil-gas pipeline project;

7) combining an openable and closable extra-long horizontal electric heating furnace with an intelligent temperature program control/regulation/recorder device, combining the implementation of a process of rotating and firing at the same time, firing the pipeline sprayed with the glass lining glaze, controlling the glass lining ground glaze and the microcrystalline glass lining glaze, and synchronously and integrally firing the microcrystalline glass lining glaze and the microcrystalline glass lining glaze at the same heating temperature;

the method applies an intelligent temperature program control/regulation/recorder and a newly developed and innovative openable and closable extra-long horizontal electric heating furnace, sprays a dried glass lining glaze layer on a pipeline system, implements a controlled enameling firing 'core technology', and enables an optimal and firmest dense layer with a wire mesh-shaped structure to be formed between a steel plate and a glass lining ground coat. The foundation is laid for accurately controlling the glass lining bottom glaze and the micro-crystallization glass lining overglaze, and synchronously and integrally firing the micro-crystallization glass lining overglaze and the micro-crystallization glass lining overglaze at the same heating temperature. Various hidden trouble defects of the glass lining glaze layer are thoroughly eradicated to the maximum extent, and the highest quality index with the pinhole number of 0 is achieved;

8) repeatedly enameling and burning the pipeline for multiple times by adopting the burning method in the step 7), and spraying glass lining glaze on the pipeline before enameling and burning each time;

preferably, the glass lining glaze slip can be uniformly sprayed by full-automatic glaze slip spraying equipment.

The large-scale microcrystal glass lining pipeline adopts a newly developed and innovative openable and closable extra-long horizontal electric heating furnace combined with an intelligent temperature program control/regulation/recorder to repeatedly enamel the pipeline for multiple times, and before each enamel firing, the whole pipeline is sprayed with a glass lining glaze layer, dried and then fired;

9) and cooling the finally fired pipeline along with the furnace according to a specific cooling curve.

The firing adopts a controlled enameling firing 'core technology'. The enameling firing process of intermediate-temperature presintering, high-temperature sintering, heat preservation and staged controlled firing can be adopted when the enamel glass base glaze on the inner wall of the pipeline is fired, the firing temperature is between room temperature and 950 ℃, and the total firing time is 5.5 to 6 hours.

Specifically, during firing, the temperature can be slowly raised to 150 ℃ at room temperature, then raised to 150-400 ℃ for pre-sintering and heat preservation, then raised to 400-600 ℃ for pre-sintering and heat preservation, wherein the firing time in the temperature range of room temperature to 600 ℃ is 4 hours in total, then the high-temperature firing at 600-950 ℃ is carried out and heat preservation, and the firing time at 600-950 ℃ and the heat preservation time are 1.5-2 hours in total.

Generally, the number of times of repeatedly enameling and burning the large-sized micro-crystallized glass-lined pipeline can reach 6-7 times.

In the step 5), the inner wall 2A and the outer wall 2C of the straight bobbin body 2, the large flange 2B surface, the reinforced annular body 2A, the reinforced steel rib plate 2B and the reinforced steel circular tube piece 2C are sprayed with glass lining ground coat, a controlled enameling burning 'core technology' is executed, the medium-temperature presintering, heat preservation and high-temperature burning can be precisely regulated and controlled, and a dense layer with a firm wire mesh structure is formed between the outer wall of the steel and the glass lining ground coat.

The glass-lined glaze combines the advantages of the microcrystalline glass-lined glaze with the Mohs hardness of more than 8 grade with excellent physicochemical properties, and the formula and the mixing proportion of the corresponding microcrystalline and amorphous glass-lined glaze can be adjusted according to the requirements of each oil and gas pipeline engineering line, particularly different structural parts of the same pipeline, on acid resistance, alkali resistance, wear resistance or specific physicochemical property for enhancing the shock resistance mechanical strength, so that the highest technical quality index of smooth circulation, durability and corrosion resistance and all-round promotion and enhancement for guaranteeing the operation safety is specially formulated for the whole-line oil and gas pipeline engineering.

The spraying and the burning of the microcrystal glass lining glaze layer 1a1 which takes microcrystal state as main body for enhancing mechanical strength at the front several deep layers of the inner wall 2A of the inner cavity of the straight tube body 2, and the spraying and the burning of the microcrystal glass lining glaze layer 1a1 which takes amorphous state as main body with smooth surface and corrosion resistance as the surface layer of the rear several layers.

And the pipeline outer wall 2C, the reinforced annular body 2a, the reinforced steel rib plate 2b and the reinforced steel round pipe piece 2C are formed by spraying and sintering a microcrystalline glass lining glaze layer 1a3 which takes a microcrystalline state with high corrosion resistance and high shock resistance as a main body.

And spraying and sintering the micro-crystallized glass lining glaze layer 1a2 on the surface of the large flange 2B at the two ends of the pipeline, wherein the surface mainly adopts a microcrystalline state which greatly enhances the mechanical strength.

The above-mentioned microcrystallized glass-lined glaze layers 1a1, 1a2 and 1a3 are collectively referred to as microcrystallized glass-lined glaze layer 1 a.

Specifically, as shown in fig. 3, 3A and 3A1, in the step 7), the openable and closable horizontal electric heating furnace is combined with an intelligent temperature program control/regulation/recorder device, and the openable and closable horizontal electric heating furnace includes a set of fixed horizontal bottom electric heating furnaces 3.1 in the shape of a semicircular ring, two sets of openable and closable horizontal electric heating furnaces 3.2 in the shape of a 1/4 circular ring, and two sets of circular plane electric heating furnaces 3.3; the two groups of 1/4 circular ring bodies of openable horizontal heating electric furnaces 3.2 are arranged at the upper part of the semi-circular ring bodies of fixed horizontal bottom heating electric furnace 3.1, and the two groups of 1/4 circular ring bodies of openable horizontal heating electric furnaces 3.2 and the semi-circular ring bodies of fixed horizontal bottom heating electric furnace 3.1 form circular ring bodies in a closed state; the two groups of circular plane heating electric furnaces 3.3 are arranged at two ends of the fixed horizontal bottom heating electric furnace 3.1 which is a semicircular ring body and the two groups of openable horizontal heating electric furnaces 3.2 which are 1/4 ring bodies.

The fixed horizontal bottom heating electric furnace 3.1 in the shape of a semicircular ring body, the two groups of openable horizontal heating electric furnaces 3.2 in the shape of 1/4 ring bodies and the two groups of circular plane heating electric furnaces 3.3 comprise refractory material layers 3a1, 3a2 and 3a3, heat-insulating material layers 3d1, 3d2 and 3d3 and concentric-axis arc-shaped heat-conducting plates 3e1 and 3e2 from inside to outside. Refractory layers 3a1, 3a2 and 3a3 are collectively referred to as refractory layers, insulation layers 3d1, 3d2 and 3d3 are collectively referred to as insulation layers, and concentric arcuate thermal plates 3e1 and 3e2 are collectively referred to as concentric arcuate thermal plates.

The two groups of openable horizontal electric heating furnaces in the form of 1/4 circular rings are selected from any one of the following openable mechanical structure devices:

one of the openable mechanical structure devices:

as shown in fig. 3B, more than 4 sets of rotary connecting members 3B1 are provided at the bottoms of two ends of the steel casing of the two sets of openable horizontal electric heaters 3.2 in the form of 1/4 torus, and more than 4 sets of opening and closing members 3B2 are provided on the steel casing of the two sets of openable horizontal electric heaters 3.2 in the form of 1/4 torus, so as to open and close the two sets of openable horizontal electric heaters 3.2 in the form of 1/4 torus;

the second openable mechanical structure device:

as shown in fig. 3C, a sliding member 3C1 is provided at the horizontal bottom of the steel casing of the two groups of 1/4 circular ring openable horizontal electric heating furnaces 3.2, and horizontal sliding rails 3C2 for horizontally sliding the sliding member 3C1 are provided at both sides of the two groups of 1/4 circular ring openable horizontal electric heating furnaces 3.2. 16 sliding parts can be arranged on the two groups of the openable horizontal electric heating furnaces in the 1/4 circular ring bodies.

As shown in fig. 4, fig. 4A, fig. 5 and fig. 5A, the openable and closable extra-long horizontal electric heating furnace further comprises two sets of pipeline positioning parts 5, the pipeline positioning parts 5 set up in the circular plane electric heating furnace 3.3 with be between the fixed horizontal bottom electric heating furnace 3.1 of the semicircular ring body, the pipeline positioning parts 5 include inner circular ring 5.1, outer circular ring 5.2 and multiunit symmetrical round steel bars 5.3, the inner circular ring 5.1 and the outer circular ring 5.2 are two sets of concentric full steel ring rings with different diameters, the multiunit symmetrical round steel bars 5.3 set up in between the inner circular ring 5.1 and the outer circular ring 5.2 and along the circumference symmetric distribution. The space parts formed by the inner ring 5.1, the outer ring 5.2 and the plurality of groups of symmetrical round steel bars 5.3 of the pipeline positioning piece can be used as the furnace feeding and discharging operation of a hoisting pipeline of a large crane. The inner ring 5.1 is matched and connected with the pipeline.

As shown in fig. 4, 5A and 5B, the inner diameter of the inner ring 5.1 of the pipe positioner matches the outer diameter of the large pipe flange 2B, three bolt holes 2B4 with 120 ° are formed on the surfaces of the inner ring 5.1 and the large pipe flange 2B, and the inner ring and the large pipe flange are detachably fastened and connected through three connecting steel plates 5.4.

The openable and closable extra-long horizontal electric heating furnace further comprises 4 rotary fixed pulleys 3.5, wherein the 4 rotary fixed pulleys 3.5 are arranged on two sides of the outer circular ring 5.2 of the two groups of pipeline positioning pieces 5. The 4 rotating fixed pulleys 3.5 are a new firing process for rotating and heating the glass lining glaze layer of the starting pipeline in the firing process.

As shown in fig. 3, the fixed horizontal bottom electric heating furnace 3.1 in the shape of a semi-circular ring and the walls of the whole inner cavities of the two groups of openable horizontal electric heating furnaces 3.2 in the shape of 1/4 circular rings are provided with arc heat-conducting plates 3e1 and 3e2 which are made of heat-resistant steel and have the same central axis. The concentric-axis arc-shaped heat conduction plates 3e1 and 3e2 cover the surface layer of the openable and closable extra-long horizontal electric heating furnace, so that the heating uniformity of the integral openable and closable extra-long horizontal electric heating furnace is improved.

The method can adjust the corresponding different microcrystalline glass-lined glaze and different firing temperatures according to the requirements of different structural parts of the same pipeline on specific physical and chemical properties and high standard technical quality, wherein a fixed horizontal bottom heating electric furnace 3.1 in the shape of a semicircular ring and two openable horizontal heating electric furnaces 3.2 in the shape of 1/4 rings are combined into an integral ring horizontal heating electric furnace 3.4 corresponding to the inner wall and the outer wall of a straight barrel pipe body of the pipeline and a microcrystalline glass-lined glaze layer of an integral outer structural assembly and two groups of circular plane heating electric furnaces 3.3 corresponding to microcrystalline glass-lined glaze layers on large flange surfaces at two ends of the pipeline are fired. The two large temperature control systems respectively combined by the integral torus horizontal electric heating furnace and the two side circular plane electric heating furnaces can effectively regulate and control different firing temperatures of the microcrystal glass lining glaze layers formed by different structural parts of the pipelines, and the same firing temperature of the microcrystal glass lining glaze layers formed by the same structural part, so as to accurately implement synchronous and integrated firing of the integral microcrystal glass lining glaze layers of the same pipeline. The large-scale micro-crystallization glass lining pipeline with extra large and extra long size, excellent quality and safe operation is manufactured. The integral external structural assembly refers to a pipeline member arranged outside the straight pipe body, such as a reinforced ring body, a reinforced steel rib plate or a reinforced steel round pipe fitting.

As shown in fig. 3, 3A and 6, the inner half peripheral wall of the fixed horizontal bottom heating electric furnace 3.1 in the shape of a semicircular ring is provided with a plurality of 1/2 annular grooves; an electric heating belt 3b1 is wound in the 1/2 annular groove; a plurality of 1/4 annular grooves are formed in the peripheral wall of the inner side 1/4 of the openable horizontal electric heating furnace 3.2 in the form of an 1/4 annular body; an electric heating belt 3b2 is wound in the 1/4 annular groove; the electric heating bands 3b1 wound in the 1/2 annular grooves and the electric heating bands 3b2 wound in the two 1/4 annular grooves are connected in a circumferential manner to form a group of electric heating bands, and the integral circular horizontal electric heating furnace 3.4 consists of a plurality of groups of electric heating bands; a plurality of circles of concentric circular grooves with different diameters are arranged on the circular plane of the circular plane heating electric furnace 3.3; a group of electric heating strips 3b3 are wound in the concentric circular grooves; each group of electric heating tapes is respectively connected with a temperature control system, and the temperature control system comprises a group of thermocouples and an intelligent temperature program control/regulation/recorder device 6.1. Two large temperature control systems combined by an integral ring horizontal heating electric furnace 3.4 and two groups of circular plane heating electric furnaces 3.3 can respectively regulate and control heating power, and accurately implement the synchronous integral firing of the integral microcrystalline glass lining glaze layer of the same pipeline at the same firing temperature of the same microcrystalline glass lining glaze layer formed by the same structure part and the same firing temperature of the same microcrystalline glass lining glaze layer formed by the same structure part of the pipeline. The electric heating tapes 3b1, 3b2 and 3b3 are collectively called electric heating tapes, and the thermocouples 3c1, 3c2 and 3c3 are collectively called thermocouples 3 c.

The group of thermocouples 3c1, 3c2 and 3c3 are correspondingly matched with the group of electric heating strips 3b1, 3b2 and 3b3, are arranged in the heating areas of the group of electric heating strips, and are used for detecting the heating temperature of the glass lining glaze layer of the pipeline in the heating areas of the electric heating strips and sending temperature signals; the intelligent temperature program control/regulation/recorder device 6.1 is arranged outside the openable and closable extra-long horizontal heating electric furnace, is connected with a group of electric heating belts matched with the group of thermocouples, and executes automatic printing, recording, archiving and quality tracking in the sintering process. The intelligent temperature program control/regulation/recorder device stores a preset temperature or temperature control curve and is used for receiving a temperature signal of the thermocouple and regulating and controlling the heating temperature of the electric heating belt after comparing the temperature signal with the preset temperature or temperature control curve.

The openable and closable extra-long horizontal electric heating furnaces with the length of 26m and the diameter of 1.8m are respectively manufactured according to the method, and large microcrystalline glass lining pipelines with the length of 25m and the diameter of 1m are developed and produced. The detection is carried out according to the detection method in GB25025-2010 glass lining equipment technical condition, the shock-resistant mechanical strength is greatly enhanced, the large flange does not deform, and the number of pin holes of the glass lining layer is 0. So as to greatly improve the overall quality, the service life and the safe operation of the large-scale micro-crystallization glass lining pipeline.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (18)

1. The large microcrystallized glass lining pipeline comprises a straight cylinder pipe body (2) and is characterized by further comprising a large flange (2B) and a reinforced ring body (2A), wherein two ends of the straight cylinder pipe body (2) are turned to form the large flange (2B), the reinforced ring body (2A) and the outer side circumference of the straight cylinder pipe body (2) are closely matched and welded on the inner side of the large flange (2B), a microcrystallized glass lining glaze layer (1a) is formed by spraying and sintering the inner wall (2A) and the outer wall (2C) of the straight cylinder pipe body (2), the outer side of the large flange (2B) and the outer side of the reinforced ring body (2A), the microcrystallized glass lining glaze layer is prepared by using a manufacturing method combining an extra-long horizontal heating electric furnace and an intelligent temperature program control/regulation/recorder device, the temperature control precision of the intelligent temperature program control/regulation/recorder device is +/-1 ℃, the electric furnace is combined with the openable and closable extra-long horizontal electric heating furnace and is combined with a technology of heating and sintering while rotating, and the openable and closable extra-long horizontal electric heating furnace comprises a group of fixed horizontal bottom electric heating furnaces (3.1) in a semicircular ring shape, two groups of openable and closable horizontal electric heating furnaces (3.2) in an 1/4 ring shape and two groups of circular plane electric heating furnaces (3.3); the two groups of the openable horizontal heating electric furnaces (3.2) in the shape of 1/4 circular ring bodies are arranged at the upper parts of the fixed horizontal bottom heating electric furnaces (3.1) in the shape of semi-circular ring bodies, and the two groups of the openable horizontal heating electric furnaces (3.2) in the shape of 1/4 circular ring bodies and the fixed horizontal bottom heating electric furnaces (3.1) in the shape of semi-circular ring bodies form the circular ring bodies in a closed state; the two groups of circular plane heating electric furnaces (3.3) are arranged at two ends of the fixed horizontal bottom heating electric furnace (3.1) which is a semicircular ring body and the two groups of openable horizontal heating electric furnaces (3.2) which are 1/4 ring bodies.

2. A large microcrystallized glass-lined pipe according to claim 1, wherein a circumferential welded joint (2e) is formed between said reinforcing torus (2a) and the outer circumference of said straight pipe body (2), and a circumferential welded joint (2e) is formed between said reinforcing torus (2a) and said large flange (2B).

3. The large-scale microcrystalline glass-lined pipeline according to claim 1, further comprising reinforcing steel rib plates (2b), wherein the reinforcing steel rib plates (2b) are symmetrically distributed along the outer circumference of the straight cylinder pipe body (2), the reinforcing steel rib plates (2b) are welded to the outer circumference of the straight cylinder pipe body (2) and are welded with the reinforcing ring body (2a), and microcrystalline glass-lined glaze layers (1a3) are sprayed and sintered on the outer sides of the reinforcing steel rib plates (2 b).

4. The large-scale microcrystalline glass-lined pipeline according to claim 3, further comprising a reinforced steel round pipe piece (2C), wherein the reinforced steel round pipe piece (2C) is symmetrically distributed along the outer circumference of the straight cylinder pipe body (2) and is arranged between two groups of reinforced steel rib plates, two ends of the reinforced steel round pipe piece (2C) are respectively welded with the outer wall (2C) of the straight cylinder pipe body and the reinforced ring body (2a), and the microcrystalline glass-lined glaze layer (1a3) is formed by spraying and sintering the outer side of the reinforced steel round pipe piece (2C).

5. A large microcrystallized glass-lined pipe according to claim 1, wherein said fixed horizontal bottom electric heating furnace (3.1) in the form of a semicircular ring and said two sets of openable horizontal electric heating furnaces (3.2) in the form of 1/4 rings are combined into a whole ring horizontal electric heating furnace (3.4) corresponding to the firing of the inner wall (2A) and outer wall (2C) of the straight body of said large microcrystallized glass-lined pipe and the microcrystallized glass-lined glaze layers (1a1, 1a3) of the whole external structural assembly (2C1), said two sets of circular plane electric heating furnaces (3.3) corresponding to the firing of the microcrystallized glass-lined glaze layers (1a2) on the surface of the large flange (2B) at both ends of the pipe, and the whole external structural assembly (2C1) is a pipe member disposed outside the straight body.

6. A large microcrystallized glass-lined pipe according to claim 5, wherein the composition of said straight barrel inner wall (2A) microcrystallized glass-lined enamel layer (1a1), said straight barrel outer wall (2C) and integral outer structural assembly (2C1) microcrystallized glass-lined enamel layer (1a3) and said microcrystallized glass-lined enamel layer (1a2) on the surface of said pipe two-end large flange (2B) are different.

7. A large-sized micro-crystallized glass-lined pipe according to claim 6, wherein the micro-crystallized glass-lined glaze layer (1a) is formed by adjusting the formulation ratio of the micro-crystalline and amorphous glass-lined glaze to be different according to the specific requirements of different physical and chemical properties of different structural parts of the same pipe.

8. A large microcrystallized glass-lined pipe according to claim 7, characterized by a microcrystallized glass-lined enamel layer (1a3) based on a microcrystalline state for enhancing shock mechanical strength at the outer wall (2C) of the pipe straight barrel (2) and the integral outer structural unit (2C 1); a microcrystalline glass lining glaze layer (1a1) which takes a microcrystalline state for enhancing mechanical strength as a main body in a deep layer of the inner wall (2A) of the pipeline straight-tube body (2), and a microcrystalline glass lining glaze layer (1a1) which takes an amorphous state with corrosion resistance and smooth surface as a main body in a surface layer of the inner wall (2A) of the pipeline straight-tube body (2); the microcrystalline glass-lined glaze layer (1a2) mainly in microcrystalline state with greatly enhanced mechanical strength is arranged on the surface of the large flange (2B) at the two ends of the pipeline, and the large microcrystalline glass-lined pipeline mainly in microcrystalline state is created and manufactured.

9. The method for manufacturing a large-sized micro-crystallized glass-lined pipe according to any one of claims 1 to 8, comprising the steps of:

1) manufacturing a pipeline component: respectively manufacturing a straight tube body (2) and a large flange (2B) formed by flanging the two ends of the straight tube body;

2) manufacturing an integral structure of the pipeline: welding a reinforcing ring body (2a) on the inner side of the large flange, wherein the reinforcing ring body (2a) is tightly matched with the outer circumference of the straight pipe body (2), a group of circumferential welding joints are circumferentially welded between the reinforcing ring body (2a) and the large flange (2B), and a pipeline component with an integral structure is formed by combining;

3) manufacturing a reinforced steel plate (2 b): a plurality of groups of symmetrically distributed reinforced steel rib plates (2b) are welded on the outer side circumference of the straight cylinder pipe body (2), and the reinforced steel rib plates (2b) are welded with the reinforced ring body (2 a);

4) manufacturing a reinforced round steel pipe (2 c): a plurality of groups of reinforced steel round pipe pieces (2C) which are symmetrically distributed and arranged in the middle of two groups of reinforced steel rib plates (2b) are welded on the outer side circumference of the straight cylindrical pipe body (2), and two ends of each reinforced steel round pipe piece (2C) are respectively welded with the outer wall (2C) of the straight cylindrical pipe body and a reinforced ring body (2 a);

5) spraying glass lining base glaze on the inner wall (2A), the outer wall (2C), the large flange (2B), the reinforced annular body (2A), the reinforced steel rib plate (2B) and the reinforced steel circular pipe piece (2C) of the straight barrel pipe body (2);

6) spraying microcrystalline glass lining overglaze on the inner wall (2A), the outer wall (2C), the large flange (2B), the reinforced ring body (2A), the reinforced steel rib plate (2B) and the reinforced steel round pipe piece (2C) of the straight barrel pipe body (2);

7) combining an openable and closable extra-long horizontal electric heating furnace with an intelligent temperature program control/regulation/recorder device, combining the implementation of a process of rotating and firing at the same time, firing the pipeline sprayed with the glass lining glaze, controlling the glass lining ground glaze and the microcrystalline glass lining glaze, and synchronously and integrally firing the microcrystalline glass lining glaze and the microcrystalline glass lining glaze at the same heating temperature;

8) repeatedly enameling and burning the pipeline for multiple times by adopting the burning method in the step 7), and spraying glass lining glaze on the pipeline before enameling and burning each time;

9) cooling the last fired pipeline along with the furnace according to a specific cooling curve;

in the step 7), the openable and closable extra-long horizontal electric heating furnace is combined with an intelligent temperature program control/regulation/recorder device, and the openable and closable extra-long horizontal electric heating furnace comprises a group of fixed horizontal bottom electric heating furnaces (3.1) in a semicircular ring shape, two groups of openable and closable horizontal electric heating furnaces (3.2) in an 1/4 circular ring shape and two groups of circular plane electric heating furnaces (3.3); the two groups of the openable horizontal heating electric furnaces (3.2) in the shape of 1/4 circular ring bodies are arranged at the upper parts of the fixed horizontal bottom heating electric furnaces (3.1) in the shape of semi-circular ring bodies, and the two groups of the openable horizontal heating electric furnaces (3.2) in the shape of 1/4 circular ring bodies and the fixed horizontal bottom heating electric furnaces (3.1) in the shape of semi-circular ring bodies form the circular ring bodies in a closed state; the two groups of circular plane heating electric furnaces (3.3) are arranged at two ends of the fixed horizontal bottom heating electric furnace (3.1) which is a semicircular ring body and the two groups of openable horizontal heating electric furnaces (3.2) which are 1/4 ring bodies.

10. The manufacturing method of large-scale microcrystalline glass-lined pipe according to claim 9, wherein in the step 5), the inner wall (2A) and the outer wall (2C) of the straight pipe body (2), the surface of the large flange (2B), the reinforcing ring body (2A), the reinforcing steel rib plate (2B) and the reinforcing steel round pipe piece (2C) are sprayed with glass-lined base glaze, and a controlled enameling burning 'core technology' is executed, so that the medium-temperature presintering, heat preservation and high-temperature burning can be precisely regulated and controlled, and a dense layer with a firm wire mesh structure is formed between the outer wall of the steel and the glass-lined base glaze.

11. The method for manufacturing a large-sized micro-crystallized glass-lined pipe according to claim 9, wherein the two sets of openable horizontal electric heating furnaces in the form of 1/4 circular rings are selected from any one of the following openable mechanical structure devices:

one of the openable mechanical structure devices:

more than 4 groups of rotary connecting parts (3B1) are arranged at the bottoms of two ends of the steel shell of the two groups of openable horizontal electric heating furnaces (3.2) in the form of 1/4 circular rings, and more than 4 groups of openable connecting parts (3B2) are arranged on the circular rings of the steel shell of the two groups of openable horizontal electric heating furnaces (3.2) in the form of 1/4 circular rings;

the second openable mechanical structure device:

and sliding parts (3C1) are arranged at the horizontal bottoms of the steel shells of the two groups of openable horizontal electric heating furnaces (3.2) which are 1/4 ring bodies, and horizontal sliding rails (3C2) for the sliding parts (3C1) to horizontally slide are arranged on two sides of the two groups of openable horizontal electric heating furnaces (3.2) which are 1/4 ring bodies.

12. The manufacturing method of the large-scale microcrystalline glass-lined pipeline according to claim 9, wherein the openable and closable extra-long horizontal electric heating furnace further comprises two sets of pipeline positioning members (5), the pipeline positioning members (5) are arranged between the circular plane electric heating furnace (3.3) and the fixed horizontal bottom electric heating furnace (3.1) in the shape of a semicircular ring, the pipeline positioning members (5) comprise inner circular rings (5.1), outer circular rings (5.2) and a plurality of sets of symmetrical round steel bars (5.3), the inner circular rings (5.1) and the outer circular rings (5.2) are two sets of concentric full steel ring rings with different diameters, and the plurality of sets of symmetrical round steel bars (5.3) are arranged between the inner circular rings (5.1) and the outer circular rings (5.2) and symmetrically distributed along the circumference.

13. The manufacturing method of large-scale microcrystalline glass-lined pipe according to claim 12, wherein said openable and closable extra-long horizontal electric heating furnace further comprises 4 rotating fixed pulleys (3.5), said 4 rotating fixed pulleys (3.5) being disposed on both sides of the outer circular ring (5.2) of said two sets of pipe positioning members (5).

14. The manufacturing method of large-scale microcrystalline glass-lined pipe according to claim 13, wherein two groups of circular plane heating electric furnaces (3.3) are combined with the temperature control precision of ± 1 ℃ corresponding to the firing of microcrystalline glass-lined glaze layer (1a2) mainly in microcrystalline state on the surface of large flange (2B) at two ends of pipe, 4 rotating fixed pulleys (3.5) driving two groups of pipe positioning pieces (5) to rotate and an intelligent temperature program control/regulation/recorder device (6.1).

15. The method for manufacturing a large-sized microcrystallized glass-lined pipe according to claim 9, wherein the walls of the whole inner cavities of said fixed horizontal bottom electric heating furnace (3.1) in the form of a semicircular ring and said two sets of openable horizontal electric heating furnaces (3.2) in the form of 1/4 rings are provided with concentric arc heat conducting plates (3e1, 3e2) made of heat resistant steel.

16. The method for manufacturing a large-sized microcrystallized glass-lined pipe according to claim 9, wherein the inside semi-peripheral wall of said fixed horizontal bottom heating electric furnace (3.1) in the shape of a semicircular ring is provided with a plurality of 1/2 ring-shaped grooves; an electric heating belt (3b1) is wound in the 1/2 annular groove; a plurality of 1/4 annular grooves are formed in the peripheral wall of the inner side 1/4 of the openable horizontal electric heating furnace (3.2) in the form of an 1/4 annular body; an electric heating belt (3b2) is wound in the 1/4 annular groove; the electric heating bands (3b1) wound in the 1/2 annular grooves and the electric heating bands (3b2) wound in the two 1/4 annular grooves are connected in a circumferential manner to form a group of electric heating bands, the fixed horizontal bottom heating electric furnace (3.1) in a semicircular ring shape and the two openable horizontal heating electric furnaces (3.2) in 1/4 ring shapes form an integral ring horizontal heating electric furnace (3.4), and the integral ring horizontal heating electric furnace (3.4) is composed of a plurality of groups of electric heating bands; a plurality of circles of concentric circular grooves with different diameters are arranged on the circular plane of the circular plane heating electric furnace (3.3); a group of electric heating tapes (3b3) are wound in the concentric circular grooves; each group of electric heating belts is respectively connected with a temperature control system, and the temperature control system comprises a group of thermocouples (3c) and an intelligent temperature program control/regulation/recorder device (6.1).

17. The method of claim 16, wherein the set of thermocouples is coupled to a set of electric heating strips and disposed within the heating zone of the set of electric heating strips; the intelligent temperature program control/regulation/recorder device (6.1) is arranged outside the openable and closable extra-long horizontal heating electric furnace and is connected with a group of electric heating belts matched with the group of thermocouples.

18. The manufacturing method of large-scale microcrystalline glass-lined pipe according to claim 17, wherein two large temperature control systems are composed of an integral circular horizontal electric heating furnace (3.4) and two groups of circular plane electric heating furnaces (3.3), each of which is independently connected with a group of electric heating strips (3b1), (3b2), (3b3) and a group of corresponding thermocouples (3c1), (3c2) and (3c3), and the two large-scale microcrystalline glass-lined pipes are respectively combined with the intelligent temperature program control/regulation/recorder device (6.1) to independently regulate heating power, set temperature control precision to +/-1 ℃, accurately implement different structural parts (2A) of the pipe, (2B) (2C) and (2C1), the microcrystalline glass-lined glaze layers (1a1), (1a2) and (1a3) with different compositions have different firing temperatures, and the integral microcrystalline glass-lined glaze layer (1a) with different compositions is synchronously and integrally fired in the same pipeline.