CN118049879A - Heat exchange tube and composite tube plate welding structure - Google Patents
Heat exchange tube and composite tube plate welding structure Download PDFInfo
- Publication number
- CN118049879A CN118049879A CN202211405213.3A CN202211405213A CN118049879A CN 118049879 A CN118049879 A CN 118049879A CN 202211405213 A CN202211405213 A CN 202211405213A CN 118049879 A CN118049879 A CN 118049879A
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- Prior art keywords
- welding
- heat exchange
- exchange tube
- coating
- annular groove
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- 238000003466 welding Methods 0.000 title claims abstract description 92
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000011248 coating agent Substances 0.000 claims abstract description 34
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 238000005253 cladding Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 21
- 239000011247 coating layer Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a welding structure of a heat exchange tube and a composite tube plate, which comprises the composite tube plate and the heat exchange tube, wherein the composite tube plate comprises a coating layer and a base layer, an annular groove is formed in the coating layer for connecting the heat exchange tube, a coating layer welding part which is used for welding the coating layer and the heat exchange tube and has a certain wall thickness T is formed on the inner side of the annular groove, and the bottom surface of the annular groove is higher than the bottom surface of the coating layer. According to the invention, the heat exchange tube and the coating form a matched structural design which is beneficial to mutual welding, a welding pool is easy to form during welding, the heat affected zone and the heating surface of the welding are reduced, the heat loss in the welding process is effectively reduced, the welding limit is clear, the manufacturing time can be saved, the welding cost is reduced, the welding process is easy to control, the welding efficiency is improved, the possibility of defects of a welded joint after welding is reduced, the welding energy is low, the welding speed is high, the temperature of each layer of interface of the composite tube plate is ensured not to exceed the limit, and the strength of the composite tube plate is not damaged.
Description
Technical Field
The invention belongs to the technical field of heat exchanger manufacturing, and particularly relates to a heat exchange tube and composite tube plate welding structure suitable for aluminum and aluminum alloy.
Background
When the tube side of the heat exchanger adopts aluminum and aluminum alloy heat exchange tubes, compared with the common steel tubes and copper tubes, the weight of the equipment can be greatly reduced, and the investment cost is generally reduced; the shell side is often made of steel or other materials with higher strength due to the factors of load, environment and the like, and a composite tube plate is needed when the tube plate is used as a connecting part between the heat exchanger tube side and the shell side.
Generally, the composite tube plate is connected with the shell side to form a base layer, and a material with higher strength is adopted; the heat exchange tube is connected with a cladding layer, and aluminum alloy are adopted; a transition layer is optionally arranged between the base layer and the coating layer. In the welding connection process of the heat exchange tubes made of aluminum and aluminum alloy and the cladding of the composite tube plate, a large amount of heat can be quickly conducted into the composite tube plate due to the large heat conductivity coefficients of the aluminum and the aluminum alloy; the welded joint at the joint of the heat exchange tube and the tube plate is an angular joint, the heat conduction mode is three-dimensional heat dissipation, and the heat transfer is faster; and the temperature of the interface of each layer of the composite tube plate can not be too high in order to not damage the performance of the composite tube plate.
Therefore, in the welding structure of the traditional heat exchange tube and the composite tube plate, in order to obtain a high-quality welding joint, an energy source with concentrated energy and high power is required to be adopted. However, the tube plate has large thickness and the heat exchange tube has thin thickness, so that a welding pool is not formed on the tube plate in the welding process, the heat exchange tube wall is burnt through by an electric arc, the welding efficiency is low, and the welding difficulty is high; if the tube wall of the heat exchange tube is prevented from being burnt through, the arc deviates to the tube plate side, and the defects of unfused and incomplete welding and the like are caused, so that the repair rate is high and the welding cost is high; and the adoption of energy sources with concentrated energy and high power can easily cause the overhigh temperature of the interface of each layer of the composite tube plate, damage the performance of the composite tube plate and influence the strength of the composite tube plate.
Disclosure of Invention
The invention aims at: aiming at the problems, the heat exchange tube and the welding structure of the composite tube plate are provided, which can reduce the welding difficulty and workload, improve the welding quality and ensure the strength of the composite tube plate.
The invention is realized by the following technical scheme: the utility model provides a heat exchange tube and compound tube sheet welded structure, includes compound tube sheet and heat exchange tube, compound tube sheet includes cladding and basic unit, its characterized in that: an annular groove is arranged on the coating layer used for being connected with the heat exchange tube, a coating layer welding part which is used for welding the coating layer and the heat exchange tube and has a certain wall thickness T is formed on the inner side of the annular groove, and the bottom surface of the annular groove is higher than the bottom surface of the coating layer.
According to the welding structure of the heat exchange tube and the composite tube plate, the width B of the annular groove is more than or equal to 2mm, and the depth H is more than or equal to 2mm.
According to the welding structure of the heat exchange tube and the composite tube plate, the height L of the bottom surface of the annular groove relative to the bottom surface of the coating is more than or equal to 2mm.
According to the welding structure of the heat exchange tube and the composite tube plate, the wall thickness T of the cladding welding part formed on the inner side of the annular groove is 0.5-12 mm.
According to the welding structure of the heat exchange tube and the composite tube plate, after the cladding and the heat exchange tube are welded, a welding seam is formed at the annular groove.
The heat exchange tube and composite tube plate welding structure has the diameter of 6-45 mm and the wall thickness t of 0.5-6 mm.
According to the welding structure of the heat exchange tube and the composite tube plate, the end part of the heat exchange tube is not lower than the upper plane of the coating, and the height h of the end part of the heat exchange tube beyond the coating is 0-12 mm.
The welding structure of the heat exchange tube and the composite tube plate is characterized in that a transition layer is arranged between the coating layer and the base layer.
The heat exchange tube and the composite tube plate welding structure are made of aluminum and aluminum alloy materials.
According to the invention, the annular groove is arranged on the coating connected with the heat exchange tube, and the coating welding part for welding with the heat exchange tube is formed, so that a matching structural design which is beneficial to mutual welding is formed on the welding part of the heat exchange tube and the coating, a welding pool is easy to form during welding, the heat affected zone and the heating surface of the welding are reduced, the heat loss in the welding process is effectively reduced, the welding energy is reduced, the welding limit is clear, the manufacturing time can be saved, the welding cost is reduced, the welding process is easy to control, the welding efficiency is improved, the probability of occurrence of defects of a welded joint after welding is reduced, the welding one-time qualification rate is improved, the welding energy is low, and the welding speed is high, so that the temperature of the interface of each layer of the composite tube plate is ensured not to exceed the limit, and the strength of the composite tube plate is not damaged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: the composite tube plate is characterized in that the composite tube plate is 1, the heat exchange tube is 2, the welding seam is 3, the coating is 11, the transition layer is 12, the base layer is 13, the annular groove is 14, and the coating welding part is 15.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
As shown in fig. 1, a welding structure of a heat exchange tube and a composite tube plate comprises a composite tube plate 1 and a heat exchange tube 2, wherein the heat exchange tube 2 is made of aluminum and aluminum alloy materials, the composite tube plate 1 comprises a coating 11 and a base layer 13, the coating is made of aluminum and aluminum alloy, the base layer is made of high-strength materials such as steel, a transition layer 12 is arranged between the coating 11 and the base layer 13, the transition layer is not necessary, whether the materials of the coating 11 and the base layer 13 are arranged or not is determined, an annular groove 14 is arranged on the coating 11 for being connected with the heat exchange tube 2, a coating welding part 15 with a certain wall thickness T for welding the coating 11 and the heat exchange tube 2 is formed on the inner side of the annular groove 14, the bottom surface of the annular groove 14 is higher than the bottom surface of the coating 11, after the coating 11 and the heat exchange tube 2 are welded, the welding seam 3 is formed at the annular groove 14, the annular groove is formed on the coating connected with the heat exchange tube, and a coating welding part for welding with the heat exchange tube is formed, so that a matching structural design which is beneficial to mutual welding is formed on the heat exchange tube and the coating at the welding position, a welding pool is easy to form during welding, a heat affected zone and a heating surface of welding are reduced, heat loss in the welding process is effectively reduced, welding energy is reduced, welding limit is clear, manufacturing time can be saved, welding cost is reduced, the welding process is easy to control, welding efficiency is improved, the possibility of defect of the welding seam after welding is reduced, the primary welding qualification rate is improved, the welding energy is low, and the welding speed is high, so that the temperature of each layer of interface of the composite tube plate is ensured not to exceed the limit, and the strength of the composite tube plate is not damaged.
In order to further ensure that the arrangement of the annular groove can play a corresponding beneficial role in welding the coating and the heat exchange tube, the invention limits the specific structure and the dimension design of the annular groove and the heat exchange tube, specifically, the width B of the annular groove 14 is more than or equal to 2mm, the depth H is more than or equal to 2mm, the bottom surface of the annular groove 14 exceeds the height L by more than or equal to 2mm relative to the bottom surface of the coating 11, the wall thickness T of a coating welding part 15 formed on the inner side of the annular groove 14 is 0.5-12 mm, the diameter of the heat exchange tube 2 is 6-45 mm, and the wall thickness T is 0.5-6 mm. The wall thickness T of the cladding welding part is preferably close to the wall thickness T of the heat exchange tube, and the part of the annular groove bottom surface exceeding the cladding bottom surface can effectively prevent the temperature during welding from being transferred to other layers of the composite tube plate, so that the performance of the composite tube plate is ensured not to be damaged.
Wherein, in order to facilitate the assembly dimension control and the subsequent welding forming of the heat exchange tube and the composite tube plate, the end part of the heat exchange tube 2 is not lower than the upper plane of the coating 11, and specifically, the height h of the end part of the heat exchange tube 2 beyond the coating 11 is 0-12 mm.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (9)
1. The utility model provides a heat exchange tube and compound tube sheet welded structure, includes compound tube sheet (1) and heat exchange tube (2), compound tube sheet (1) include coating (11) and basic unit (13), its characterized in that: an annular groove (14) is formed in the coating (11) for connecting with the heat exchange tube (2), a coating welding part (15) which is used for welding the coating (11) with the heat exchange tube (2) and has a certain wall thickness T is formed on the inner side of the annular groove (14), and the bottom surface of the annular groove (14) is higher than the bottom surface of the coating (11).
2. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: the width B of the annular groove (14) is more than or equal to 2mm, and the depth H is more than or equal to 2mm.
3. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: the bottom surface of the annular groove (14) exceeds the bottom surface of the coating (11) by more than or equal to 2mm.
4. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: the wall thickness T of the cladding welding part (15) formed on the inner side of the annular groove (14) is 0.5-12 mm.
5. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: after the cladding (11) and the heat exchange tube (2) are welded, a welding seam (3) is formed at the annular groove (14).
6. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: the diameter of the heat exchange tube (2) is 6-45 mm, and the wall thickness t is 0.5-6 mm.
7. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: the end part of the heat exchange tube (2) is not lower than the upper plane of the coating (11), and the height h of the end part of the heat exchange tube (2) beyond the coating (11) is 0-12 mm.
8. The heat exchange tube and composite tube sheet welded structure according to claim 1, wherein: a transition layer (12) is arranged between the cover layer (11) and the base layer (13).
9. The heat exchange tube and composite tube sheet welded structure according to any one of claims 1 to 8, wherein: the heat exchange tube (2) is made of aluminum and aluminum alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211405213.3A CN118049879A (en) | 2022-11-10 | 2022-11-10 | Heat exchange tube and composite tube plate welding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211405213.3A CN118049879A (en) | 2022-11-10 | 2022-11-10 | Heat exchange tube and composite tube plate welding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118049879A true CN118049879A (en) | 2024-05-17 |
Family
ID=91043575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211405213.3A Pending CN118049879A (en) | 2022-11-10 | 2022-11-10 | Heat exchange tube and composite tube plate welding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118049879A (en) |
-
2022
- 2022-11-10 CN CN202211405213.3A patent/CN118049879A/en active Pending
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