CN119436907A - A spiral tube heat exchanger - Google Patents
A spiral tube heat exchanger Download PDFInfo
- Publication number
- CN119436907A CN119436907A CN202411707447.2A CN202411707447A CN119436907A CN 119436907 A CN119436907 A CN 119436907A CN 202411707447 A CN202411707447 A CN 202411707447A CN 119436907 A CN119436907 A CN 119436907A
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- Prior art keywords
- heat exchanger
- tube
- pipe
- spiral
- positioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/14—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically both tubes being bent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明提供一种螺旋套管式换热器，涉及换热器技术领域，包括外管、内管、定位管、弧形侧板、保温组件，内管位于外管的内部，内管与外管形成套管式换热器结构，定位管的一端贯穿外管，且与内管的外壁焊接固定，且定位管与外管焊接固定。本发明，通过采用螺旋形式的内管和外管，当内外盘管金属温差较大时，内外盘管将产生大小不一的变形，由于内外盘管之间有较大的间隙，其变形不会受到相互制约；而螺旋盘管相对于直管有较大的弹性，能够消除大部分温差应力，可避免使用膨胀节，从而降低成和泄漏风险。
The present invention provides a spiral tube-type heat exchanger, which relates to the technical field of heat exchangers, including an outer tube, an inner tube, a positioning tube, an arc-shaped side plate, and a heat preservation component. The inner tube is located inside the outer tube, and the inner tube and the outer tube form a tube-type heat exchanger structure. One end of the positioning tube passes through the outer tube and is welded and fixed to the outer wall of the inner tube, and the positioning tube is welded and fixed to the outer tube. The present invention adopts a spiral inner tube and an outer tube. When the metal temperature difference between the inner and outer coils is large, the inner and outer coils will produce deformations of different sizes. Due to the large gap between the inner and outer coils, their deformations will not be restricted by each other; and the spiral coil has greater elasticity than the straight tube, which can eliminate most of the temperature difference stress, and can avoid the use of expansion joints, thereby reducing the risk of formation and leakage.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a spiral double-pipe heat exchanger.
Background
The heat exchanger is a device for transferring heat from one fluid to another fluid without mixing the fluids, and various types of heat exchangers exist at present, such as a double pipe heat exchanger, a plate heat exchanger, a spiral plate heat exchanger, a plate shell heat exchanger and the like, and the double pipe heat exchanger can bear larger pressure when working due to simple structure, has small obstruction (pressure drop) on heat exchange fluid and is widely applied.
The main structure of the double-pipe heat exchanger is that an outer pipe is sleeved on an inner pipe, two ends of the outer pipe are welded with the inner pipe through pipe caps or cone shells, so that a group of sleeves are formed, a plurality of groups of sleeves are used for connecting the inner pipe in series through U-shaped elbows, the outer pipe is connected in series through pipe orifices, one fluid flows in the inner pipe, the other fluid flows in a gap between the inner pipe and the outer pipe, and heat exchange is carried out on two cold and hot fluids through the inner pipe wall.
The inventors have found that conventional double pipe heat exchangers suffer from the following drawbacks during long term use of the double pipe heat exchanger:
1. Because the inner tube and the outer tube are longer straight tubes, when the metal temperature difference between the inner tube and the outer tube is larger or the metal expansion amount generated by different materials of the inner tube and the outer tube is different, larger temperature difference stress can be generated in the inner tube and the outer tube, in order to reduce the temperature difference stress, an expansion joint is added on the outer tube, the cost is increased due to the arrangement of the expansion joint, and the leakage risk is increased due to the fact that more welding joints are added.
2. When in actual use, the effective heat exchange area is only the part of the inner tube covered by the outer tube, the part of the inner tube extending out of the outer tube and the U-shaped elbow part can not perform the heat transfer function, and the part between the connecting tube orifice between the outer tube and the connecting piece between the inner tube and the outer tube, the medium flow forms a dead zone, and the heat transfer effect is poor.
3. The inner pipe and the outer pipe are welded by using a pipe cap or a conical shell, each group of the pipes are connected in series by using a U-shaped elbow pipe, a pipe orifice and a flange, and the elements and the connecting joints are numerous, so that the material and processing cost is increased, and the leakage risk is increased.
In order to solve the technical problems, the invention provides a spiral double-pipe heat exchanger.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a spiral double-pipe heat exchanger, which solves the problems that as the inner pipe and the outer pipe of the traditional double-pipe heat exchanger are longer straight pipes, when the metal temperature difference of the inner pipe and the outer pipe is larger, larger temperature difference stress is generated in the inner pipe and the outer pipe, expansion joints are required to be added on the outer pipe, the number of elements and connecting joints for connection is increased, the cost is increased, the leakage risk is increased, and dead areas are formed between the connecting pipe orifices between the outer pipes and the connecting pieces of the inner pipe and the outer pipe due to the fact that the medium flows, and the heat transfer effect is poor.
In order to achieve the above purpose, the invention is realized by the following technical scheme that the spiral double-pipe heat exchanger comprises:
the inner tube is positioned in the outer tube, the inner tube and the outer tube form a sleeve-type heat exchanger structure, and the outer tube and the inner tube are spiral coils with equal spiral radius and equal screw pitch;
One end of the positioning tube penetrates through the outer tube, the positioning tube is welded and fixed with the outer wall of the inner tube, and the positioning tube is welded and fixed with the outer tube;
The side surface of the arc-shaped side plate is provided with a positioning hole, the positioning pipe is fixedly inserted into the positioning hole, and the bottom of the arc-shaped side plate is fixedly connected with a supporting seat;
the positioning pipes are arranged in a plurality, and the positioning pipes are distributed at equal intervals along the linear length directions of the outer pipe and the inner pipe;
The heat preservation assembly is in a circular cylinder shape and is arranged at the inner side, the outer side and the end part of the double-pipe heat exchanger structure.
Further preferably, the double pipe heat exchanger structure is provided with a plurality of groups, the spiral radius of the outer pipe and the spiral radius of the inner pipe of the double pipe heat exchanger structure are gradually decreased, the plurality of groups of the double pipe heat exchanger structures are distributed from outside to inside, the inner pipes of the plurality of groups of the double pipe heat exchanger structures are linearly connected through a first outer pipe disc connecting pipe, and the annular flow channels of the plurality of groups of the double pipe heat exchanger structures are linearly connected through a second outer pipe disc connecting pipe;
The multi-group double pipe heat exchanger is formed by a whole body with an A fluid inlet, an A fluid outlet, a B fluid inlet and a B fluid outlet.
Further preferably, the insulation structure includes:
an inner cylinder body positioned at the inner side of the sleeve type heat exchanger structure, wherein a heat preservation cotton layer is fixedly arranged at the inner side of the inner cylinder body;
the outer cylinder body is positioned outside the sleeve type heat exchanger structure, the top end of the arc-shaped side plate is fixedly connected with a transverse strut, the bottom end of the arc-shaped side plate is fixedly connected with a base, and the bottom ends of the outer cylinder body and the inner cylinder body are fixedly connected with the base;
The heat preservation spiral sheet plate is attached to the top end of the double-pipe heat exchanger structure, the outer side of the heat preservation spiral sheet plate is fixedly connected with the outer cylinder body, and the inner side of the heat preservation spiral sheet plate is fixedly connected with the inner cylinder body.
Further preferably, the base comprises an annular piece, a widened portion is arranged on the annular piece, the top of the widened portion of the annular piece is fixedly connected with the bottom end of the arc-shaped side plate, and supporting legs are fixedly connected to the bottom of the widened portion of the annular piece.
Further preferably, the heat-insulating spiral sheet plate is formed by welding a plurality of groups of short sheets smaller than 120 degrees, wherein the spiral angle of the short sheets is 380-420 degrees.
Further preferably, a through hole is formed in the side face of the outer tube, an outer welding portion is formed by welding the outer side of the positioning tube and the edge of the through hole, and an inner welding portion is formed by welding the inner side of the positioning tube and the inner tube.
Further preferably, a blocking block is fixedly installed inside the positioning tube.
Further preferably, the diameter of the outer tube is 2-3 times of the diameter of the inner tube, the diameter of the inner tube is 10-25CM, and the inner diameter of the positioning tube is not less than 5CM.
Further preferably, the first outer pipe coil connecting pipe is U-shaped.
Further preferably, the double-pipe heat exchanger structure is provided with a plurality of groups, the spiral radius of the outer pipe and the spiral radius of the inner pipe of the double-pipe heat exchanger structure are gradually decreased, and the plurality of groups of the double-pipe heat exchanger structures are distributed from outside to inside;
each set of the double pipe heat exchangers has an a fluid inlet, an a fluid outlet, a B fluid inlet, a B fluid outlet.
The invention provides a spiral double-pipe heat exchanger. The beneficial effects are as follows:
1. The invention adopts the inner pipe and the outer pipe (i.e. the inner pipe and the outer pipe) in spiral form, when the temperature difference between the metal of the inner pipe and the metal of the outer pipe is larger, the inner pipe and the outer pipe can generate deformation of different sizes, the deformation of the inner pipe and the outer pipe is not restricted by each other due to larger gaps between the inner pipe and the outer pipe, and the spiral pipe has larger elasticity relative to the straight pipe and can be used as a flexible element to generate elastic deformation in the horizontal direction and the vertical direction, thereby eliminating most of temperature difference stress, avoiding using expansion joints and reducing the risk of formation and leakage.
2. According to the invention, the inner tube and the outer tube in the spiral form are adopted, the inner tube and the outer tube can be made into long plates according to actual needs, the length of the single spiral coil is not limited by the length of the straight tube, the length of the single spiral coil can be far longer than that of the single straight tube, the occupied space is smaller, and the whole spiral tube length range is an effective heat exchange area, so that the heat exchange area can be greatly improved under the unit installation area.
3. Compared with the traditional double-pipe heat exchanger, the spiral double-pipe heat exchanger can greatly reduce connecting elements and joints between the inner pipe and the outer pipe, between the inner pipes of each section and between the outer pipes of each section, and reduces the leakage risk while reducing the material and processing cost.
4. The invention is characterized in that one end of the positioning tube penetrates through the outer tube and is welded and fixed with the outer wall of the inner tube, the positioning tube and the outer tube are also welded and fixed, the inner tube can be basically positioned in the center of the outer tube by virtue of the positioning tube, after the outer tube and the inner tube with longer spiral shapes are processed, the inner tube is spirally inserted into the outer tube and then the positioning tube is welded, so that the stability of the structure of the spiral double-tube heat exchanger is ensured, the inner tube is not swayed when the fluid pressure in the inner tube is changed, and the unstable condition is not caused, and the design of the positioning tube is convenient for integrally supporting and installing the arc-shaped side plates and the supporting seat at the bottom.
5. According to the invention, the lengths of the heat exchange pipelines can be further prolonged through the parallel/serial multi-group double pipe heat exchanger structure, and the actual heat exchange requirement is met.
Drawings
Fig. 1 is a front view of a spiral double pipe heat exchanger according to a first embodiment of the present invention;
fig. 2 is a cross-sectional view of a spiral double pipe heat exchanger according to a first embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
Fig. 4 is a structure of a positioning tube of a spiral double pipe heat exchanger according to a first embodiment of the present invention;
Fig. 5 is a perspective view of a spiral double pipe heat exchanger according to a second embodiment of the present invention;
Fig. 6 is a cross-sectional view of a spiral double pipe heat exchanger according to a second embodiment of the present invention;
fig. 7 is a schematic view of the inside of a spiral double pipe heat exchanger according to a second embodiment of the present invention;
Fig. 8 is a second perspective internal perspective view of a spiral double pipe heat exchanger according to a second embodiment of the present invention;
fig. 9 is a schematic perspective view of a heat-insulating spiral sheet of a spiral double pipe heat exchanger according to a second embodiment of the present invention.
Wherein, 1, arc side plates; 2, an outer tube, 3, a positioning tube, 4, a supporting seat, 5, an inner tube, 6, a positioning hole, 7, an outer welding part, 8, an inner welding part, 9, a blocking block, 10, an A fluid inlet, 11, a B fluid outlet, 12, an A fluid outlet, 13, a B fluid inlet, 14, an outer tube body, 15, an inner tube body, 16, a heat insulation cotton layer, 17, a cross brace, 18, a base, 1801, an annular piece, 1802, a widening part, 1803, supporting feet, 19, a heat insulation spiral sheet plate, 20, a first outer tube disc connecting tube, 21 and a second outer tube disc connecting tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
As shown in fig. 1-3, the embodiment of the invention provides a spiral double-pipe heat exchanger, which comprises an outer pipe 2, an inner pipe 5, a positioning pipe 3, an arc-shaped side plate 1 and a heat insulation component, wherein the inner pipe 5 is positioned in the outer pipe 2, the inner pipe 5 and the outer pipe 2 form a double-pipe heat exchanger structure, in particular, the inner pipe 5 is positioned in the outer pipe 2, two ends of the inner pipe 5 extend out from two ends of the outer pipe 2, the two ends of the outer pipe 2 are fixedly connected with the inner pipe 5 or the two ends of the outer pipe 2 are fixedly connected with the outer wall of the inner pipe 5 through a connecting joint, an annular flow passage is formed between the outside of the inner pipe 5 and the inside of the outer pipe 2, two ends of the inner pipe 5 are respectively an a fluid inlet and an a fluid outlet, two ends of the annular flow passage are respectively a fluid inlet and a fluid outlet, and when the fluid inlet B is close to the fluid outlet a, in particular use, the fluid a flows from the fluid inlet a to the fluid outlet a, the fluid B flows in the opposite directions with the fluid B, and the fluid B exchanges heat through the outer wall of the inner pipe 5; the outer tube 2 and the inner tube 5 are spiral coils with equal spiral radius and equal pitch, namely the outer tube 2 is an outer coil, the inner tube 5 is an inner coil, one end of the positioning tube 3 penetrates through the outer tube 2, the positioning tube 3 is welded and fixed with the outer wall of the inner tube 5, the positioning tube 3 is fixed with the outer tube 2, the outer tube 2 and the inner tube 5 are fixed by means of the positioning tube 3, the inner tube 5 is guaranteed to be positioned at the central position of the outer tube 2, the positioning holes 6 are formed in the side face of the arc-shaped side plate 1, the positioning tube 3 is fixedly inserted into the positioning holes 6, the bottom of the arc-shaped side plate 1 is fixedly connected with the supporting seat 4, the supporting seat 4 is used for stably supporting the arc-shaped side plate 1, the positioning tube 3 is provided with a plurality of positioning tubes, and the positioning tubes 3 are arranged along the outer tube 2, the linear length direction equidistance distribution of inner tube 5, double pipe heat exchanger structure are annular cylindric, and heat preservation subassembly sets up inboard, outside and the tip at double pipe heat exchanger structure, and heat preservation subassembly is used for carrying out the heat preservation to the double pipe heat exchanger structure.
The invention relates to a double-pipe heat exchanger used in the chemical industry field, which generally adopts a multi-section straight pipe structure, namely an outer pipe is sleeved on an inner pipe, two ends of the outer pipe are welded with the inner pipe through pipe caps or conical shells, thus forming a group of sleeves, a plurality of groups of sleeves are connected with the inner pipe in series through U-shaped elbow pipes, the outer pipe is connected in series through pipe orifices, one fluid flows in the inner pipe, the other fluid flows in the gap between the inner pipe and the outer pipe, and two cold and hot fluids exchange heat through the inner pipe wall.
The spiral inner tube and the spiral outer tube are adopted, so that the inner tube and the outer tube can be manufactured longer, the manufactured spiral double-tube heat exchanger is better in integration, and particularly, the inner tube is basically a complete seamless tube, so that the problem of liquid leakage in the inner tube is greatly reduced.
As shown in fig. 1, an outer tube 2 and an inner tube 5 with proper diameters are selected, spiral coils are processed with the same spiral radius and pitch, an outer coil with larger diameters is sleeved on an inner coil with smaller diameters in a spiral mode, a group of spiral sleeves are formed, two ends of the outer tube 2 are extruded and contracted through a hydraulic die, the ends of the outer tube 2 are welded and fixed on the inner tube 5, holes are formed in positions, close to two ends, of the outer tube 2, an inlet/outlet tube is connected, a fluid inlet and a fluid outlet are formed in the outer side of the outer tube 2, two ends of the inner tube 5 are an A fluid inlet and an A fluid outlet, then mounting holes for mounting the positioning tube 3 are formed in the side face of the outer tube 2, one end of the positioning tube 3 is inserted into the mounting holes, one end of the positioning tube 3 abuts against the side face of the inner tube 5, laser welding is carried out from the inner portion of the inner tube 5, the inner tube 5 and the positioning tube 3 are welded and fixed, and finally laser welding of the positioning tube 3 and the mounting holes of the outer tube 2 are completed, and the positioning tube 3 is used for fixing the outer tube 2 and the inner tube 5 together.
Specifically, a through hole (mounting hole) is formed in the side surface of the outer tube 2, the outer side of the positioning tube 3 is welded to the edge of the through hole to form an outer welded portion 7, and the inner side of the positioning tube 3 is welded to the inner tube 5 to form an inner welded portion 8.
The liquid B is the liquid to be heated, the liquid A is the heat supply fluid, in order to ensure the efficient and stable supply of the liquid B meeting the temperature requirement, the sectional area design of the annular flow channel is larger, the liquid flow velocity in the annular flow channel is larger, the problems caused by the larger sectional area design of the annular flow channel and the larger liquid flow velocity design in the annular flow channel are that the actual heat exchange efficiency of the liquid is lower, and the problem caused by the larger sectional area design of the annular flow channel is that the liquid close to the outer side part of the outer tube 2 cannot perform better heat exchange; the design of the spiral double-pipe heat exchanger ensures that the B fluid is turbulent in the annular flow passage, ensures that the heat exchange of the B fluid is uniform, and ensures that the B fluid is heated to a preset temperature due to the design of the spiral double-pipe heat exchanger, which ensures that the heat exchange time of the B fluid in the annular flow passage is increased.
Specifically, the diameter of the outer tube 2 is 2-3 times of the diameter of the inner tube 5, the space between the inner tube 5 and the outer tube 2 is large, a large fluid section can be provided, the diameter of the inner tube 5 is 10-25CM, the inner diameter of the positioning tube 3 is not less than 5CM, and a laser head can be inserted into the positioning tube 3 to finish welding operation.
In an embodiment, the inside fixed mounting of locating tube 3 has the shutoff piece 9, and locating tube 3 and inner tube 5 welding are influenced by the space and welding quality may not be good, uses shutoff piece 9 to block up the inside of locating tube 3, can avoid the liquid infiltration to locate tube 3 in, then take place to reveal.
Embodiment two:
Referring to fig. 5 to 9, the difference from the first embodiment is that the double pipe heat exchanger structure has a plurality of groups, the spiral radius of the outer pipe 2 and the inner pipe 5 of the double pipe heat exchanger structure is decreased, the double pipe heat exchanger structures are distributed from the outside to the inside, the inner pipes 5 of the double pipe heat exchanger structures are linearly connected through the first outer pipe plate connecting pipe 20, the annular flow channels of the double pipe heat exchanger structures are linearly connected through the second outer pipe plate connecting pipe 21, the double pipe heat exchanger structures are distributed in the above manner, the space can be better utilized, the length of the heat exchange pipe actually located in the whole of the double pipe heat exchanger structure can be further prolonged, the double pipe heat exchanger structure is provided with an A fluid inlet 10, an A fluid outlet 12, a B fluid inlet 13 and a B fluid outlet 11, and the first outer pipe plate connecting pipe 20 is U-shaped.
That is, the multiple sets of double pipe heat exchanger structures are connected in series, so that the length of the heat exchange pipeline can be further prolonged.
Embodiment III:
The first difference from the above embodiment is that the double-pipe heat exchanger structure has multiple groups, the spiral radius of the outer pipe and the spiral radius of the inner pipe of the multiple groups of double-pipe heat exchanger structure are gradually decreased, the multiple groups of double-pipe heat exchanger structures are distributed from outside to inside, the multiple groups of double-pipe heat exchanger structures are distributed in the manner, so that the space can be better utilized, and each group of double-pipe heat exchangers has an A fluid inlet, an A fluid outlet, a B fluid inlet and a B fluid outlet.
That is, the multiple sets of double pipe heat exchangers are connected in parallel (not shown in the drawings), so that heat exchange of multiple strands of liquid can be realized synchronously, and liquid can be supplied stably.
Specifically, the heat insulation structure comprises an inner cylinder 15 positioned at the inner side of the double-pipe heat exchanger structure, an outer cylinder 14 positioned at the outer side of the double-pipe heat exchanger structure and a heat insulation spiral sheet 19.
The inboard of interior barrel 15 is fixed to be provided with heat preservation cotton layer 16, heat preservation cotton layer 16 is used for increasing the heat preservation nature of interior barrel 15, the top fixedly connected with stull 17 of arc curb plate 1, stull 17 is used for connecting a plurality of arc curb plates 1, the bottom fixedly connected with base 18 of arc curb plate 1, base 18 plays the supporting role, urceolus 14, the bottom of interior barrel 15 all with base 18 fixed connection, heat preservation screw plate 19 laminating is at the top of double pipe heat exchanger structure, and the outside and the outer barrel 14 fixed connection of heat preservation screw plate 19, and the inboard and the interior barrel 15 fixed connection of heat preservation screw plate 19.
In this scheme, heat preservation screw plate 19, inner tube body 15, outer barrel 14 constitute an annular space, and the annular body that many double-pipe heat exchanger structure constitutes is located the inside of annular space to play the effect of heat preservation.
In one embodiment, the base 18 comprises a ring 1801, wherein a widened portion 1802 is arranged on the ring 1801, the widened portion 1802 can be connected with a plurality of arc-shaped side plates 1, the top of the widened portion 1802 of the ring 1801 is fixedly connected with the bottom end of the arc-shaped side plates 1, and the bottom of the widened portion 1802 of the ring 1801 is fixedly connected with a supporting leg 1803.
In an embodiment, the heat-insulating spiral sheet 19 has a spiral angle of 380 ° -420 °, and generally, the heat-insulating spiral sheet 19 is greater than 360 °, and the heat-insulating spiral sheet 19 is formed by welding a plurality of groups of short sheets smaller than 120 °, and the plurality of groups of short sheets smaller than 120 ° are convenient to install, and the heat-insulating spiral sheet 19 is formed by welding and fixing after the installation positions are aligned.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a spiral double pipe heat exchanger, includes outer tube (2), inner tube (5) are located the inside of outer tube (2), and inner tube (5) and outer tube (2) form double pipe heat exchanger structure, a serial communication port, outer tube (2) are the spiral coil of equi-spiral radius, equi-pitch with inner tube (5), still include:
the positioning tube (3), one end of the positioning tube (3) penetrates through the outer tube (2), the positioning tube (3) is welded and fixed with the outer wall of the inner tube (5), and the positioning tube (3) is welded and fixed with the outer tube (2);
The positioning device comprises an arc-shaped side plate (1), wherein a positioning hole (6) is formed in the side surface of the arc-shaped side plate (1), the positioning pipe (3) is fixedly inserted into the positioning hole (6), and a supporting seat (4) is fixedly connected to the bottom of the arc-shaped side plate (1);
The positioning pipes (3) are arranged in a plurality, and the positioning pipes (3) are distributed at equal intervals along the linear length direction of the outer pipe (2) and the inner pipe (5);
The heat preservation assembly is in a circular cylinder shape and is arranged at the inner side, the outer side and the end part of the double-pipe heat exchanger structure.
2. A spiral double pipe heat exchanger according to claim 1, wherein the double pipe heat exchanger structure is provided with a plurality of groups, the spiral radius of the outer pipe (2) and the spiral radius of the inner pipe (5) of the double pipe heat exchanger structure are gradually decreased, the plurality of groups of the double pipe heat exchanger structures are distributed from outside to inside, the inner pipes (5) of the plurality of groups of the double pipe heat exchanger structures are linearly connected through a first outer pipe disc connecting pipe (20), and the annular flow channels of the plurality of groups of the double pipe heat exchanger structures are linearly connected through a second outer pipe disc connecting pipe (21);
The whole of the multi-group double pipe heat exchanger is provided with an A fluid inlet (10), an A fluid outlet (12), a B fluid inlet (13) and a B fluid outlet (11).
3. A spiral double pipe heat exchanger according to claim 2, wherein the insulating structure comprises:
an inner cylinder body (15) positioned at the inner side of the double pipe heat exchanger structure, wherein a heat preservation cotton layer (16) is fixedly arranged at the inner side of the inner cylinder body (15);
The outer cylinder body (14) is positioned at the outer side of the sleeve-type heat exchanger structure, the top end of the arc-shaped side plate (1) is fixedly connected with a transverse strut (17), the bottom end of the arc-shaped side plate (1) is fixedly connected with a base (18), and the bottom ends of the outer cylinder body (14) and the inner cylinder body (15) are fixedly connected with the base (18);
The heat preservation spiral sheet plate (19), heat preservation spiral sheet plate (19) laminating is at the top of double pipe heat exchanger structure, and the outside and the urceolus body (14) fixed connection of heat preservation spiral sheet plate (19), and the inboard and the interior barrel (15) fixed connection of heat preservation spiral sheet plate (19).
4. A spiral double pipe heat exchanger according to claim 3, wherein the base (18) comprises a ring (1801), a widened portion (1802) is arranged on the ring (1801), the top of the widened portion (1802) of the ring (1801) is fixedly connected with the bottom end of the arc-shaped side plate (1), and a supporting leg (1803) is fixedly connected with the bottom of the widened portion (1802) of the ring (1801).
5. A spiral double pipe heat exchanger as claimed in claim 3, wherein the heat preservation spiral sheet plate (19) has a spiral angle of 380-420 DEG, and the heat preservation spiral sheet plate (19) is formed by welding a plurality of groups of short sheets smaller than 120 deg.
6. A spiral double pipe heat exchanger according to claim 1, wherein a through hole is formed in the side face of the outer pipe (2), an outer welding portion (7) is formed by welding the outer side of the positioning pipe (3) with the edge of the through hole, and an inner welding portion (8) is formed by welding the inner side of the positioning pipe (3) with the inner pipe (5).
7. A spiral double pipe heat exchanger according to claim 6, wherein the inner part of the positioning pipe (3) is fixedly provided with a blocking block (9).
8. A spiral double pipe heat exchanger according to claim 1, wherein the diameter of the outer pipe (2) is 2-3 times the diameter of the inner pipe (5), the diameter of the inner pipe (5) is 10-25CM, and the inner diameter of the positioning pipe (3) is not less than 5CM.
9. A spiral double pipe heat exchanger according to claim 2, wherein the first outer pipe disc connection tube (20) is U-shaped.
10. The spiral double pipe heat exchanger according to claim 1, wherein the double pipe heat exchanger structure is provided with a plurality of groups, the spiral radius of the outer pipe (2) and the spiral radius of the inner pipe (5) of the plurality of groups of the double pipe heat exchanger structure are gradually decreased, and the plurality of groups of the double pipe heat exchanger structures are distributed from outside to inside;
Each set of double pipe heat exchangers has an A fluid inlet (10), an A fluid outlet (12), a B fluid inlet (13), and a B fluid outlet (11).
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| CN202411707447.2A CN119436907B (en) | 2024-11-26 | 2024-11-26 | A spiral tube heat exchanger |
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| CN202411707447.2A CN119436907B (en) | 2024-11-26 | 2024-11-26 | A spiral tube heat exchanger |
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| CN110822943A (en) * | 2019-10-12 | 2020-02-21 | 西安交通大学 | A split spiral coiled casing heat exchanger |
| CN110849179A (en) * | 2019-10-12 | 2020-02-28 | 西安交通大学 | High-temperature high-pressure heat exchanger with temperature compensation and machining method thereof |
| CN115420122A (en) * | 2022-11-03 | 2022-12-02 | 涉县津东经贸有限责任公司 | A temperature-controllable casing heat exchanger |
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2024
- 2024-11-26 CN CN202411707447.2A patent/CN119436907B/en active Active
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| CN101101177A (en) * | 2007-07-19 | 2008-01-09 | 清华大学 | Canal evaporator |
| CN206959685U (en) * | 2014-07-01 | 2018-02-02 | 瓦勒麦克股份公司 | Heat exchanger |
| KR20160100514A (en) * | 2015-02-16 | 2016-08-24 | 주식회사 글로벌 그린 에너지 | Double-pipe heat exchanger with airflow arrangement of gas and liquid |
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| CN119436907B (en) | 2025-06-24 |
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