MX2012001989A - Brazing apparatus for al clad oblong tube for air cooling system condensing plant. - Google Patents

Abstract

The present invention relates to an SRC tube brazing apparatus. The SRC tube brazing apparatus, in which a clad tube and a cooling fin is put into an electric heating furnace to braze the cooling fin on an outer circumference surface of the clad tube to thereby manufacture a single row condensing tube, includes: a jig frame; a first skid set supported by the jig frame to support a lower surface of at least one or more clad tubes, the first skid set having a seat groove which has a shape corresponding to that of a lower end of the clad tube to prevent the tube from being warped or twisted by thermal deformation at a high temperature within the electric heating furnace after the tube is seated on the plurality of clad tubes; heat fillers for guiding brazed positions of a plurality of cooling fins disposed to face both side surfaces of the plurality of clad tubes seated on the first skid set, the heat fillers being disposed between the cooling fins so that the cooling fins adjacent to each other do not contact each other; and a pressing unit disposed on each of both sides of the jig frame, the pressing unit previously contacting and pressing the outermost heat filler of the heat fillers surrounding the clad tubes and the cooling fin which are put into the electric heating furnace to closely attach the clad tube and the cooling fin to each other at a uniform pressure.

Description

WELDING APPLIANCE FOR OBLONGO ALUMINUM COATING TUBE FOR CONDENSATION PLANT OF AIR COOLING SYSTEM Field of the Invention The teachings in accordance with the illustrative embodiments of this present description generally relate to a welding apparatus configured to join two materials by heating the two materials at a high temperature, and more particularly to a welding apparatus for aluminum coating oblong pipe. (AL) for cooling system for an air cooling system condensing plant configured to weld an aluminum fin to a steam condensing pipe which is a core element of a cooling module with air applied to a cooling plant. high-performance power generation.

Background of the Invention An atomic power plant or a thermoelectric power plant uses fuels such as uranium, kerosene and coal to generate heat, and uses heat to circulate water in a system and to generate steam. The generated steam rotates a turbine to generate electricity, where the steam passed through the turbine is cooled by a condenser to become water again.

Ref. 226276 Particularly, a method of cooling with water, in which the water is used to cool a condensation process in the method of generating steam circulation energy, needs a large amount of cooling water, so that usually Seawater is used as cooling water in the condenser. In this way, the atomic energy plant or the thermoelectric power plant are usually built on the sea shore to be supplied without problems with and discharge the seawater that is used as cooling water.

However, seawater used as cooling water is discharged in a heated state by passing through a cooling system of the power plant. The seawater discharged into the sea from the power plant in the heated state is equivalent to hundreds of tons per hour. Seawater in the warmed state increases the temperature of seawater to create several environmental problems such as destroying the marine ecosystem, to name a few.

In addition, an amount of cooling water to be supplied to the steam condenser is absolutely insufficient in countries without an outlet to the sea, so that a problem arises when using a cooling condenser with water as a cooling system.

In view of the aforementioned problem, power plants using a condenser in air cooling have recently been proposed, and are widely used in the interior in China and in E.U.A. , for example, where the supply of seawater is insufficient. Although the power station that uses the air-cooled condenser is disadvantageous because the facilities become bulky in the cooling condenser with existing water, the power station that uses the air-cooled condenser has to enter the center of attention as ecological power generating facilities due to the fact that it can be advantageously installed in an inland area instead of a sea-side area to provide relative flexibility in selecting a location for a power plant over a power plant that you must use the cooling condenser with water, and you may be free from the fear of creating a marine pollution caused by the rise in temperature in the seawater that results from the entry / exit of cooling water.

The air-cooling condenser uses a large number of tubes, where the tube can be classified into two types based on the shape, that is, an oblong tube of AL coating (aluminum) and a Galvanized tube of multiple rows (MRG). , for its acronym in English) . The steam condensing tube for the power plant has a structure in which an aluminum fin or both sides of the cladding tube made of aluminum and steel conduits are welded. An external aluminum surface in the steam condensing tube for the power plant is oxidized after welding to denature in aluminite, so that surface corrosion in the air is not generated above a predetermined level.

In addition, a boundary between an aluminum fin and an aluminum coating material on the outer surface of the molten coating tube is a fully cast metal coupled fabric having an advantageously perpetual heat transfer effect without corrosion.

The vapor condensing tube for the power plant should maintain a cross section 5-10 times larger than that of a small cylindrical tube (2.54 cm ~ 5.08 cm (1"~ 2")) to have a relatively large cross-sectional area , whereby the internal air of non-condensable gas can be quickly removed to allow a quick initial start-up operation and to advantageously get rid of an internal freezing of condensation water during the winter operation due to a greater flow of condensation water than that of a tube with a small cross section.

Meanwhile, the cylindrical MRG tube of conventional heat exchange type is externally fixed with cooling bolts to increase the heat transfer effect using various methods. The metal fusion method is an electric resistance welding method that uses metals of the same class, which is the closest method to obtain an intrinsic tube effect through the welded cooling fins. However, the electric resistance welding method is disadvantageous in that each fin is thickened and the difficulty arises in arranging a large number of bolts in order to allow each of the cooling fins to have a cross section suitable for welding. electric resistance. The disadvantage results in the degradation of the cooling effect caused by a decreased heating surface.

In order to solve the aforementioned disadvantages, the cooling fins can be incorporated in the surface of the tube, but the incorporation creates a diminished performance of complete installations due to the rapid degradation of the heat transfer capacity of the intrinsic function of the tube. caused by the generation of galvanic corrosion in the limit 2 ~ 3 months after exposure to air at the beginning of the operation.

The conventional MRG tube has been widely applied, for domestic and foreign consumption, for heat transfer by the exchange of cooling heat with air, because the steam condensing tube is deficient in pressure resistance, and high in Manufacturing cost on the MRG tube. However, the steam condensing tube is relatively excellent over the MRG tube, because vapor condensation is easy if the vacuum degree is high and differential vacuum pressure is applied to an interior of the steam condensing tube.

Since the 90's, the conventional steam condensation tube for the power plant developed and used particularly by European countries and E.U.A. It has a high defect index in the welding process of aluminum bolts and casing pipes due to an old manufacturing method to act as a factor that increases a manufacturing cost of the product.

In order to weld the cladding tubes and the aluminum fins according to the conventional method, fixed steel frames are arranged vertically between which an aluminum fin, a cladding tube and an aluminum fin are arranged sequentially, and a portion in which the aluminum fin and the casing tube are oriented towards each other is coated with flux, wrapped with steel cable and placed in an electric heating furnace. Then, the aluminum fins are pressed into the high temperature furnace by the self-weight of the steel fastening frames to be fused to the upper / lower surfaces of the cladding tube.

However, if the aluminum fins are partially and excessively heated, and they are applied with excessive energy, there are possibilities that the aluminum fins are fused to the casing tube and also to the frame. Under these circumstances, a torch is used to separate the aluminum fin from the frame, where the product can be inevitably damaged and no longer usable. As a result, a need arises to develop a manufacturing method capable of improving the productivity in the manufacturing process of the steam condensing tubes in order to extensively apply steam condensing pipes for power plants.

Summary of the Invention The present description has been made to solve the above disadvantages of the prior art and therefore an objective of certain embodiments of the present description is to provide a welding apparatus for aluminum coating oblong pipe for the condensation plant cooling system with air configured to reduce a defect index that can occur in the welding process of aluminum cladding tubes and bolts by improving a manufacturing process of a steam condensing tube for power plants, and to allow mass production .

The technical issues to be resolved by the present description are not restricted to the aforementioned description, and any other technical problem not mentioned so far will be clearly appreciated from the following description by the person skilled in the art. That is, the present description will be more readily understood and other objectives, features, details and advantages thereof will become more apparent during the course of the following explanatory description, which is provided, without intending to imply any limitation of the description, with reference to the attached figures.

It is an object of the invention to solve at least one or more of the problems and / or disadvantages mentioned above in whole or in part to provide at least the advantages described hereinafter. In order to achieve at least the above objects, completely or in part, and in accordance with the purposes of the description, represented and described broadly, and in a general aspect of the present invention, a welding apparatus for oblong tube is provided. aluminum coating (AL) for the condensation plant of air cooling system when a coating tube and a cooling fin enter an electric heating furnace to weld a cooling fin or a periphery of the coating tube, the apparatus comprising: a guiding frame; a first group of dollies that supports the guide, which supports a bottom surface of the at least one liner tube and has an incorporation groove having a shape corresponding to a lower form of the liner tube to prevent the condensation tube The steam is bent and twisted by thermal deformation under a high temperature inside the electric heating furnace after the plurality of coating tubes are incorporated in disposition positions; heating fillers guiding welding positions of a plurality of cooling fins each oriented to both lateral surfaces of the plurality of casing tubes incorporated in the first group of dollies, and interposed between respective cooling fins to prevent fins adjacent cooling units come into contact with each other; and a pressure unit mounted on both sides of the guide frame to apply a line contact pressure from both sides on an outer heating pad between heating fillers that wrap the casing pipe entered in the electric heating furnace and fin of cooling and to just contact the cooling tube to the cooling fin.

Preferably, the pressure unit comprises: a pressure lever body; and a rotation shaft, wherein the pressure lever body includes a contact pressure unit having a length corresponding to a length of longitudinal direction of the heating filler and contacting the outer heating filler line of the first group of rolling platform, and a balance weight incorporation unit formed with a groove for incorporating a balance weight having a predetermined weight, and the rotation shaft rotatably supports the pressure lever body at a predetermined position within the heating furnace electric depending on whether the balance weight has been incorporated.

Preferably, the balance weight is a bar member having a round cross section and having a length corresponding to a length of the pressure lever body.

Preferably, the groove in the balance weight incorporation unit is provided in a trench shape with an open top surface and having a width corresponding to a diameter of the round cross section of the bar member, and incorporated with the member. of bar through the upper open surface.

Preferably, the pressure unit and the incorporation unit are formed to have an angle in the range of 90 ° ~ 150 ° between them on the rotation shaft.

Preferably, the apparatus further comprises a second group of dollies provided in the same shape as the first dolly group to fix the liner tube from a welding position of the cooling fin on upper sides of the liner tube and the heating padding together with the first group of dollies.

Preferably, the first mutually adjacent dolly groups are spaced at the same distance if no pressure is applied from the pressure unit.

Preferably, the first dolly group is formed with a graphite material.

Preferably, the first and second dolly groups are formed with a graphite material.

Preferably, the heating filler is formed with a graphite material.

Preferably, the heating filler takes the form of a rectangular parallelepiped having a length corresponding to a length of the coating tube.

Preferably, each of the first and second dolly groups is divided in a longitudinal direction of the liner tube with a predetermined space (L).

Preferably, the predetermined space (L) is in the range of 2-2.5 m.

The welding apparatus for an oblong aluminum lining pipe for the condensation plant of air cooling system in accordance with the present description has an advantageous effect since the product defects, such as melting between an aluminum fin and a A frame that occurs frequently in a conventional steam condensation tube welding process for a power plant can be prevented, and the tube can be manufactured two to three times more than the conventional method.

Brief Description of the Figures The appended figures, which are included to provide further understanding of the description and are incorporated into and constitute a part of this application, illustrate modality (s) of the description, and together with the description serve to explain the principle of the description. In the figures: Figures 1 and 2 are schematic views illustrating a welding apparatus for aluminum coating oblong tube for condensation plant of air cooling system in accordance with an illustrative embodiment of the present disclosure; Figure 3 is an exploded perspective view illustrating an arrangement of the first and second dolly groups, a heating filler, a liner tube and a cooling fin according to an illustrative embodiment of the present disclosure; Figure 4 is a schematic view illustrating a coupled relationship between the liner tube and the cooling fin of Figure 3; Y Figure 5 is a schematic view illustrating a liner tube in accordance with an illustrative embodiment of the present disclosure.

Detailed description of the invention Various illustrative embodiments will be described more fully hereinafter with reference to the appended figures, in which some illustrative modalities are shown. The present inventive concept can, however, be represented in many different forms and should not be construed as limited to the illustrative embodiments described herein. Rather, these illustrative embodiments are provided so that this description is exhaustive and complete, and fully conveys the scope of the present inventive concept to those skilled in the art.

It will be understood that when an element or a layer is referred to as being "on", "connected to" or "coupled to" another element or layer, it may be directly on, connected or coupled to the other element or layer or elements may be present or intermediate layers. In contrast, when an element is referred to as being "directly on", "directly connected to" or "directly coupled to" another element or layer, there are no intermediate elements or layers present. Similar numbers refer to similar elements from start to finish.

It will be understood that, although the terms first, second, third, etc. they may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are used only to distinguish an element, a component, a region, a layer or a section from another region, layer or section. Thus, a first element, component, region, layer or section discussed below should be referred to as a second element, component, region, layer or section without departing from the teachings of the present inventive concept.

As used herein, the singular forms "a", "one" and "the" are intended to also include plural forms, unless the context clearly indicates otherwise. It will further be understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of features, integers, steps, operations, elements, and / or components mentioned, but do not prevent the presence or the addition of one or more other characteristics, integers, steps, operations, elements, components, and / or groups thereof.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by an expert the technique to which this inventive concept pertains. It will further be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless it is defined in that way here expressly.

Well-known component descriptions and processing techniques are omitted so as not to unnecessarily obscure the modalities of the description.

Hereinafter, a welding apparatus for oblong pipe of aluminum coating for condensation plant of the cooling system with air in accordance with the present description will be described in detail with reference to the attached figures.

Figures 1 and 2 are schematic views illustrating a welding apparatus for aluminum lining oblong tube for condensation plant of air cooling system in accordance with an illustrative embodiment of the present disclosure, Figure 3 is a perspective view exploited illustrating an arrangement of first and second dolly groups, a heating filler, a liner tube and a cooling fin according to an illustrative embodiment of the present disclosure, Figure 4 is a schematic view illustrating a relationship coupled between the liner tube and the cooling fin of Figure 3, and Figure 5 is a schematic view illustrating a liner tube in accordance with an illustrative embodiment of the present disclosure.

The welding apparatus for aluminum coating oblong tube for condensation plant of the air cooling system in accordance with an illustrative embodiment of the present disclosure includes a guide frame (100), a first group of dollies (200), a heating filler (300) and a pressure unit (500).

An electric heating furnace (1) is a device for welding a coating tube (10) and a cooling bolt (20) which forms a steam condensing tube for a power plant at a predetermined temperature. The electric heating furnace (1) can be formed on a floor surface with a plurality of roller members to allow the lining tube (10) and the cooling fin (20) to enter and exit without problems from an entrance to a departure. The electric heating furnace (1) is provided there with a plurality of heat sources (110) on an upper surface and a lower surface to allow heating of the lining tube (10) and the cooling fin (20) entered in it. a temperature range of at least 250 ° C ~ 260 ° C. The principle and configuration of the electric heating furnace (1) are irrelevant to the subject of the present description, so no detailed explanation will be given here to the furnace (1).

The guide frame (100) is formed to enter a plurality of liner tubes (10) and cooling fins simultaneously into the electric heating furnace (1), and the guide frame (100) includes the first platform group. roller (200), heating pad (300) and pressure unit (500) to be described later.

Referring to Figures 1 and 2, the first dolly group (200) is preferably formed with a graphite material capable of supporting a lower surface of the plurality of liner tubes (10). A first group of dollies (200) prevents the lining tube (10) from being twisted in a longitudinal direction while the welding process is invoked developed inside the electric heating furnace (1).

Referring to Figure 2, the first dolly group (200) is formed with an incorporation groove (210) having a shape corresponding to a surface opposite the liner tube (10). The insertion groove 210 is preferably created with an open trench shape on an upper side, and as shown in the figure, is created with a shape corresponding to that of a lower surface of the lining tube 10.

Referring to Figure 3, the first dolly group (200) includes a liner tube (10) for each first dolly. The number of coating tubes (10) entered in the electric heating furnace (1) varies based on the size of the electric heating furnace (1), so that the number of first dollies that constitute the first dolly group (200) may increase or decrease based on the number of casing tubes (10) entered.

Meanwhile, referring to Figure 4, a plurality of first dolly groups (200) is preferably divided in a predetermined space (L) to a longitudinal direction of the lining tube (10) to intermittently support the liner tube. (10) If only a first dolly is provided with a length corresponding to that of the lining tube (10) to support a lower surface of the lining tube (10), the heat from the electric heating furnace (1) is insufficiently transmitted to the Flux (21) to disable welding work. In that way, as illustrated in Figure 4, the space (L) is formed in a range of approximately 2-2.5 m to allow the plurality of first dollies to preferably support a lower side of the liner tube (10).

According to an illustrative embodiment of the present disclosure, the liner tube (10) is preferably incorporated in the first dolly group (200) to allow the openings formed at both ends to be directed to an inlet and outlet of the furnace Electric heating (1). In addition, the cooling fin (20) of aluminum material is welded to both side surfaces forming a wider surface of the casing tube (10), and a narrower portion of the casing tube (10) is preferably incorporated in the slot of incorporation (210) provided in the first dolly group (200).

Meanwhile, the lining tube materials (10) are preferably made by coating aluminum with semi-hard steel, whereby the cooling fin (20) of aluminum is completely fused to the lining tube (10) through the process of welding, and a large number of tubes can be welded simultaneously to sheets of pipe to consistently perform excellent welding capacity.

Referring to Figure 5, each of an upper side and a lower side of the lining tube (10) preferably takes a round shape while both side surfaces of the lining tube (10) take a convex shape.

That is, as illustrated in Figure 5, a center width of the lining tube (10) is wider than a width of the upper side and a width of the lower side based on a cross section of the lining tube (10) , where the center width, the width of the upper side and the width of the lower side are formed to have a first space (g). The reason for convexly creating both lateral surfaces of the lining tube (10) is to allow the lining tube (10) and the cooling fin (20) to gradually expand a contact area and join and fix uniformly.

Both side surfaces of the lining tube (10) are arranged with a cooling fin (20) formed by folding an aluminum plate. At this time, a portion bent in a zigzag shape on the cooling fin (20) is arranged on an upper side and a lower side, as illustrated in Figure 3, to allow air to circulate in a vertical direction of the tube of coating (10). A surface opposite the coating tube (10) of the cooling fin (20) is coated with flux (21), as shown in Figure 4, where the flux (21) receives heat from the electric heating furnace (1). ) to connect the cladding tube (10) and the cooling fin (20) fixedly and electrically. In addition, the cooling fin (20) is formed with a length corresponding to a length of the coating tube (10) to cover a complete lateral surface of the coating tube (10).

A heating pad (300) serves to guide a welding position of the plurality of cooling fins (20) disposed opposite to both lateral surfaces of the plurality of casing tubes (10) incorporated in the first dolly group. (200), and is interposed between the cooling fins (20) so that the adjacent cooling fins (20) do not have to contact each other.

The heating filler (300) takes an approximate shape of a rectangular parallelepiped which preferably has a length corresponding to that of a coating tube (10) and that of the cooling fin (20), wherein the pressure unit (500) ) is made to fuse the cooling fin (20) to the side surface of the lining tube (10) with a uniform force. Referring to Figure 3, a lower side of the heating pad (300) is preferably provided with a support member (310) to support a movement of the cooling fin (20) to a gravitational direction.

The welding apparatus for oblong tube of the aluminum cladding (AL) for an air cooling system condensing plant can further include a second group of dolly (400) provided in the same way as that of a first pallet group roller to fix the lining tube and a welding position of the cooling fin on upper sides of the lining tube and the heating filler together with the first group of dollies. The shape of the second dolly group (400) preferably corresponds to that of the first dolly group (200).

Although the second group of dollies (400) may not necessarily be required due to that. the first dolly group (200) is available, the first and second dolly groups can further prevent the liner tube (10) and the cooling fin (20) from being twisted from both upper and lower sides.

Meanwhile, it is preferred that the first and second adjacent dolly groups (200, 400) are spaced apart from each other with an identical space if no pressure is applied from the pressure unit (500, described later). The space, as illustrated in Figure 1, is preferably provided with a value less than twice the first space (G). Under this configuration, if the liner tube (10) and the cooling fin (20) are brought just and completely in contact by the pressure unit (500), the pressure is good enough to flatten only the convex portion of the tube of coating (10) to a certain degree, and no further pressure is provided to prevent the cooling fin (20) and the coating tube (10) from being twisted by excessive force.

In addition, the first and second dolly groups, and the heating pad are preferably formed with a graphite material. The graphite is light (density: 1.75), excellent in heat resistance and does not fuse with aluminum at a high temperature, so that, unlike the prior art, defects such as fusion between the aluminum cooling fin and the aluminum can be prevented. Steel frame during the work procedure. Although the illustrative embodiment of the present disclosure has restricted the material of the former, the second dolly groups (200, 400) and the heating pad (300) to graphite, the material is not limited thereto, and any Alternative material capable of preventing fusion with aluminum cooling fin.

The pressure unit (500) is formed on both sides of the guide frame (100) to apply a line contact pressure to the outer heating fills (300a, 300b) in the first and second dolly groups (200 , 400), between the heating fillers (300) that wrap the lining tube (10) and the cooling fin (20) entered in the electric heating furnace for contact just between the lining tube (10) and the fin Cooling (20). The pressure unit (500) includes a pressure lever body (510) and a rotation shaft (520).

The pressure lever body (510) has a length corresponding to a longitudinal direction length of the heating pad (300) and includes a contact pressure unit (511) and a balance weight incorporation unit (512). The contact pressure unit (511) makes line contact with the outer heating fills (300a, 300b) of the first and second dolly groups (200, 400), and the balance weight incorporation unit ( 512) is formed with a groove in which a balance weight (513) having a predetermined weight is incorporated.

The balance weight (513) is preferably a bar member having a round cross section and having a length corresponding to a length of the pressure lever body (510).

The groove formed in the balance weight incorporation unit is preferably provided in a trench shape with an open top surface and having a width corresponding to a diameter of the round cross-section of the bar member, and incorporated with the cross member. bar through the open top surface.

The rotation shaft (520) rotatably supports the pressure lever body (510) to a predetermined position of the guide frame within the electric heating oven (1) depending on whether the balance weight (513) has been incorporated.

Meanwhile, it is preferable that the pressure unit (511) and the incorporation unit (512) are formed to have an angle in the range of 90 ° ~ 150 ° between them on the rotation shaft (520).

Now, the operation of the aluminum coating oblong tube (AL) welding apparatus for the condensation plant of air cooling system in accordance with the present description will be described with reference to the attached figures.

Referring again to Figures 1 and 2, the welding apparatus for the aluminum cladding oblong tube (AL) for the condensation plant of the air cooling system according to the present disclosure is such that a plurality is raised of coating tubes (10) simultaneously and entering an electric heating furnace (1), where a cooling bolt (20) formed by bending aluminum plates flat on both surfaces is welded. For this purpose, a lower side and an upper side of the lining tube (10) is supported when using the first and second dolly groups (200, 400) in order to allow each flat surface of liner tubes ( 10) respectively form both side surfaces in a raised state and enter the electric heating furnace (1).

In addition, each of the liner tubes (10) and the cooling fins (20) is interposed between the heating filler (300), and the pressure unit (500) provided in the electric heating furnace (1) applies pressure to the side surfaces of the lining tubes (10) and the cooling fins (20) prepared in this way and performs the welding procedure.

That is, although the conventional method was to sequentially arrange a frame, a cooling fin, a cladding tube, a cooling fin and a frame in the horizontal state, and the heavy steel frame of self-weight presses the tubes of coating and cooling to weld the liner tubes (10) and the cooling fins (20), the conventional method was disadvantageous in that the cooling fins and frames are fused together to generate a damaged vapor condensing tube. In addition, the upper and lower surfaces of the tubes are applied with different pressure due to weight difference.

However, the configuration according to the present description is advantageous since the cooling fin (20) is coupled on both sides of the coating tube (10) in a direction perpendicular to the gravitational direction, and the pressure unit (500). ), which uses the graphite heating filler (300), can apply uniformly pressure to a surface opposite the coating tube (10) and the cooling fin (20) as necessary through the graphite heating filler for perform the welding work, for which there is no defect during the welding operation.

In addition, due to the fact that the welding operation is carried out with the casing tube (10) in a vertically raised state, a greater number of casing tubes (10) can be entered in the electric heating furnace (1) than the of the conventional position welding operation to greatly improve productivity.

The prior description of the present invention is provided to enable any person skilled in the art to make or use the invention. Various modifications to the invention will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the invention. In this way, the invention is not intended to limit the examples described herein, but rather the broader scope consistent with the principles and novel features described herein will be agreed upon.

As is evident from the foregoing, the welding apparatus for aluminum lining oblong tube (AL) for the condensation plant of air cooling system in accordance with the present disclosure has an industrial applicability in that it can be prevented product defects, such as fusion between an aluminum fin and a frame that occurs frequently in a conventional steam condensation tube welding process for a power plant, and the tube can be manufactured two to three times more than the conventional method .

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (13)

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. - A welding apparatus for aluminum lining oblong tube (AL) for an air cooling system condensing plant when a coating tube and a cooling fin are fed into an electric heating furnace to weld the cooling fin to a periphery of the coating tube, characterized in that it comprises: a guiding framework; a first group of dollies that supports the guide, which supports a bottom surface of the at least one liner tube and has an incorporation groove having a shape corresponding to a lower form of the liner tube to prevent the condensation tube The steam is bent and twisted by thermal deformation under a high temperature inside the electric heating furnace after the plurality of coating tubes are incorporated in disposition positions; each of the heating fillers guiding welding positions of a plurality of cooling fins are oriented to both lateral surfaces of the plurality of casing tubes incorporated in the first group of dollies, and interposed between respective fins of casing to prevent that the adjacent cooling fins contact each other; and a pressure unit mounted on both sides of the guide frame to apply a line contact pressure from both sides on an outer heating filler between heating fillers that wrap the coating tube entered in the electric heating furnace and the fin of cooling and to just contact the lining tube to the cooling fin.

2. - The apparatus according to claim 1, characterized in that the pressure unit comprises: a pressure lever body; a rotating shaft, wherein the pressure lever body includes a contact pressure unit having a length corresponding to a longitudinal direction length of the heating filler and contacting in line the outer heating filler of the first platform group roller, and a balance weight incorporation unit formed with a slot for incorporating a balance weight having a predetermined weight, and the rotation shaft rotatably supports the pressure lever body to a predetermined position within the electric heating oven depending on whether the balance weight has been incorporated.

3. - The apparatus according to claim 2, characterized in that the balance weight is a bar member having a round cross section and having a length corresponding to a length of the pressure lever body.

4. - The apparatus according to claim 3, characterized in that the groove of the balance weight incorporation unit is provided in a trench shape with an open top surface and having a width corresponding to a diameter of the round cross section of the bar member, and incorporated with the bar member through the open top surface.

5. - The apparatus according to claim 2, characterized in that the pressure unit and the incorporation unit are formed to have an angle in the range of 90 ° ~ 150 ° between them on the rotation shaft.

6. - The apparatus according to claim 1, characterized in that it further comprises a second group of dollies provided in the same way as the first group of dollies to fix the lining tube and a welding position of the cooling fin on the upper side of the lining tube and the heating padding together with the first dolly group.

7. - The apparatus according to claim 1, characterized in that the first mutually adjacent dolly groups are spaced at the same distance if no pressure is applied from the pressure unit.

8. - The apparatus according to claim 1, characterized in that the first group of dollies is formed with a graphite material.

9. - The apparatus according to claim 6, characterized in that the first and second dolly groups are formed with a graphite material.

10. - The apparatus according to claim 1, characterized in that the heating filler is formed with a graphite material.

11. - The apparatus according to claim 1, characterized in that the heating filling takes the form of a rectangular parallelepiped having a length corresponding to a length of the coating tube.

12. - The apparatus according to claim 6, characterized in that each of the first and second dolly groups are divided in a longitudinal direction of the lining tube with a predetermined space (L).

13. - The apparatus according to claim 12, characterized in that the predetermined space (L) is in the range of 2-2.5 m. SUMMARY OF THE INVENTION The present disclosure describes a welding apparatus for aluminum lining oblong pipe (AL) for the condensation plant of the air cooling system by introducing a lining pipe and a cooling fin to an electric heating furnace for welding the fin cooling to a periphery of the coating tube, the apparatus comprising: a guide frame; a first group of dollies that supports the guide, which supports a bottom surface of the at least one liner tube and has an incorporation groove having a shape corresponding to a lower form of the liner tube to prevent the condensation tube The steam is bent and twisted by thermal deformation under a high temperature inside the electric heating furnace after the plurality of coating tubes are incorporated in disposition positions; heating pads guiding welding positions of a plurality of cooling fins to orient to both lateral surfaces of the plurality of casing tubes incorporated in the first dolly group, and interposed between respective cooling fins to prevent cooling fins adjacent ones contact each other; and a pressure unit mounted on both sides of the guide frame to apply line contact pressure from both sides on an outer heating filler between heating fillers that wrap the casing pipe entered in the electric heating furnace and fin of cooling and to just contact the lining tube to the cooling fin.