Welding structure capable of being in lap joint with strong pressure-resistant plate fin type core body and end cover

Abstract

The utility model discloses a lap-joint welding structure of a strong pressure-resistant plate-fin type core body and end covers, which comprises two end covers, and a plate-fin type heat exchanger core body is clamped between the two end covers. The top of the joint of the two end covers and the plate-fin heat exchanger core and the bottom of the joint of the two end covers and the plate-fin heat exchanger core are each provided with a lap joint groove. The lap joint type welding structure is characterized in that lap joint grooves are formed in the top of the joint of the two end covers and the plate-fin heat exchanger core, and lap joint grooves are formed in the bottom of the joint of the two end covers and the plate-fin heat exchanger core. The joint of the core body and the end cover of the plate-fin heat exchanger is in lap joint through the lap joint piece and the lap joint groove, and the Z-shaped lap joint seam is formed at the lap joint position, so that the internal pressure of the plate-fin heat exchanger can be prevented from being directly transmitted to the welding seam, the pressure needing to be borne by the welding seam can be effectively reduced, and the service life of the plate-fin heat exchanger is prolonged. And meanwhile, a V-shaped chamfer is formed at the welding part of the core body and the end cover of the plate-fin heat exchanger, so that the appearance of a welding seam can be improved, the welding penetration depth is increased, and the plate-fin heat exchanger has higher pressure-bearing performance.

Description

Technical Field

[0001] The utility model relates to the field of plate-fin heat exchangers, in particular to a welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover. Background Art

[0002] Plate-fin heat exchangers are mainly composed of baffles, seals, fins, etc. Plate-fin heat exchangers have the advantages of small size, light weight, and the ability to handle more than two media. They are widely used in industries such as petroleum, chemical industry, and natural gas processing. As the application environment gradually expands, higher requirements are placed on their pressure-bearing performance. However, at present, most of the cores of plate-fin heat exchangers are not treated after vacuum brazing. The end cover is directly welded to the core after adding welding chamfers. The large deformation during welding heating and cooling can easily apply a large tensile force to the weld metal. Under the combined effect of these factors, welding defects are easily formed during argon arc welding, which are gradually exposed as the use time increases.

[0003] In order to solve the above problems, a welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover is proposed. Utility Model Content

[0004] The utility model aims to provide a welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover, comprising two end covers, a plate-fin heat exchanger core is clamped between the two end covers, overlapping grooves are provided at the top of the connection between the two end covers and the plate-fin heat exchanger core and at the bottom of the connection between the two end covers and the plate-fin heat exchanger core, overlapping pieces are fixedly provided at the top of the connection between the plate-fin heat exchanger core and the two end covers and at the bottom of the connection between the plate-fin heat exchanger core and the two end covers, chamfers are provided at the connection between the plate-fin heat exchanger core and the four overlapping pieces, the four overlapping pieces are respectively arranged corresponding to the four overlapping grooves, and the plate-fin heat exchanger core A plurality of connecting clips are fixedly arranged at the middle part of the connection with the two end covers, and a connecting slot is opened at the middle part of the connection between the two end covers and the plate-fin heat exchanger core, and the plurality of connecting slots are respectively engaged and connected with the plurality of connecting clips. The plate-fin heat exchanger core comprises two side plates, a plurality of first seals, a plurality of partitions, a plurality of second seals, a plurality of cold wave fins and a plurality of hot wave fins. A plurality of cold wave fins and a plurality of hot wave fins are welded between the two side plates, and the plurality of cold wave fins and the plurality of hot wave fins are alternately arranged, and a partition is arranged between each adjacent cold wave fin and hot wave fin, and the first seal and the second seal are respectively arranged at both ends of the plurality of partitions.

[0006] By using overlapping pieces and overlapping grooves to overlap the connection between the core and the end cover of the plate-fin heat exchanger and forming a Z-shaped overlapping seam at the overlap, the internal pressure of the plate-fin heat exchanger can be prevented from being directly transmitted to the weld, thereby effectively reducing the pressure that the weld needs to bear. At the same time, a V-shaped chamfer will be formed at the welding position between the core and the end cover of the plate-fin heat exchanger, which can improve the appearance of the weld and increase the penetration depth of the weld, so that the plate-fin heat exchanger has higher pressure-bearing performance. In addition, a number of connecting slots are respectively arranged in cooperation with a number of connecting clips, so that the core and the end cover of the plate-fin heat exchanger can be firmly connected, thereby ensuring the overall structural strength of the plate-fin heat exchanger.

[0007] Preferably, blocking covers are provided at both ends of the two end covers, and the blocking covers can play a blocking role.

[0008] Preferably, the middle parts of the bottom ends of the two end covers are respectively fixedly connected with a water outlet pipe and a water inlet pipe, a mounting seat is fixedly arranged in the middle part of the inner side of the water inlet pipe, an annular seat is snap-fitted inside the mounting seat, and an activated carbon filter, a fine filter and a coarse filter are fixedly arranged on the inner side of the annular seat in sequence from top to bottom. The coordinated arrangement of the activated carbon filter, the fine filter and the coarse filter facilitates filtering of the liquid entering the core of the plate-fin heat exchanger.

[0009] Preferably, an auxiliary pull ring is fixedly provided at the bottom end of the coarse filter. By pulling the auxiliary pull ring downward with a large force, several limiting springs are separated from several limiting grooves, thereby facilitating the disassembly and maintenance of the annular seat and other structures.

[0010] Preferably, a plurality of placement slots are provided at the top of the inner side of the placement seat, and placement blocks are respectively engaged with the inside of the plurality of placement slots, and the plurality of placement blocks are fixedly connected to the annular seat, so that the annular seat can be initially limited by engaging the plurality of placement blocks with the limiting engagement of the plurality of placement slots.

[0011] Preferably, one side of several of the placement blocks is provided with a mounting groove, several of the installation grooves are fixedly provided with limiting spring sheets inside, one side of the inner wall of several of the placement grooves is provided with limiting grooves, several of the limiting spring sheets are respectively engaged with several limiting grooves, and the annular seat can be further limited by the limiting engagement of several limiting spring sheets with several limiting grooves.

[0012] Preferably, the bottom ends of the water outlet pipe and the water inlet pipe are fixedly provided with connecting flanges, and the surfaces of the two connecting flanges are provided with a plurality of fixing holes. The setting of the connecting flanges facilitates the connection of the water outlet pipe and the water inlet pipe with other pipelines.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By using overlapping pieces and overlapping grooves to overlap the connection between the core and the end cover of the plate-fin heat exchanger and forming a Z-shaped overlapping seam at the overlap, the internal pressure of the plate-fin heat exchanger can be prevented from being directly transmitted to the weld, thereby effectively reducing the pressure that the weld needs to bear. At the same time, a V-shaped chamfer will be formed at the welding position between the core and the end cover of the plate-fin heat exchanger, which can improve the appearance of the weld and increase the penetration depth of the weld, so that the plate-fin heat exchanger has higher pressure-bearing performance. In addition, a number of connecting slots are respectively arranged in cooperation with a number of connecting clips, so that the core and the end cover of the plate-fin heat exchanger can be firmly connected, thereby ensuring the overall structural strength of the plate-fin heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the connection between the core and the end cover of the plate-fin heat exchanger of the utility model;

[0017] Figure 3 It is a cross-sectional view of the water inlet pipe of the utility model;

[0018] Figure 4 It is an enlarged view of part A of the utility model;

[0019] Figure 5 It is a structural diagram of the core of the plate-fin heat exchanger of the utility model.

[0020] In the figure: 1. plate-fin heat exchanger core; 101. side plate; 102. first seal; 103. partition; 104. second seal; 105. cold wave fin; 106. hot wave fin; 2. end cover; 3. outlet pipe; 4. inlet pipe; 5. plugging cover; 6. lap joint; 7. chamfer; 8. lap joint groove; 9. connecting clip; 10. connecting slot; 11. connecting flange; 12. fixing hole; 13. mounting seat; 14. annular seat; 15. activated carbon filter; 16. fine filter; 17. coarse filter; 18. auxiliary pull ring; 19. mounting slot; 20. mounting block; 21. mounting slot; 22. limiting spring piece; 23. limiting slot. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] See also Figure 1-5The utility model provides a welding structure for overlapping a strong pressure-resistant plate-fin core and an end cover, comprising two end covers 2, a plate-fin heat exchanger core 1 is clamped between the two end covers 2, overlapping grooves 8 are provided at the top of the connection between the two end covers 2 and the plate-fin heat exchanger core 1 and at the bottom of the connection between the two end covers 2 and the plate-fin heat exchanger core 1, overlapping parts 6 are fixedly provided at the top of the connection between the plate-fin heat exchanger core 1 and the two end covers 2 and at the bottom of the connection between the plate-fin heat exchanger core 1 and the two end covers 2, and the plate-fin heat exchanger core 1 and the four overlapping parts are fixedly provided. The connection parts 6 are all provided with chamfers 7, and the four overlap parts 6 are respectively arranged corresponding to the four overlap grooves 8. A plurality of connection clamps 9 are fixedly arranged in the middle of the connection between the plate-fin heat exchanger core 1 and the two end covers 2. A connection card slot 10 is provided in the middle of the connection between the two end covers 2 and the plate-fin heat exchanger core 1. The plurality of connection card slots 10 are respectively engaged and connected with the plurality of connection clamps 9. The plate-fin heat exchanger core 1 includes two side plates 101, a plurality of first seals 102, a plurality of partitions 103, a plurality of second seals 104, a plurality of cold The plate-fin heat exchanger core 101 and the end cover 2 are connected by a lap joint 6 and a lap joint groove 8, and the lap joint is formed by a lap joint 6 and a lap joint groove 8 at the connection between the plate-fin heat exchanger core 1 and the end cover 2. The formation of a Z-shaped lap seam can prevent the internal pressure of the plate-fin heat exchanger from being directly transmitted to the weld, thereby effectively reducing the pressure that the weld needs to withstand. At the same time, a V-shaped chamfer 7 will be formed at the welding position of the plate-fin heat exchanger core 1 and the end cover 2, which can improve the appearance of the weld and increase the welding depth, so that the plate-fin heat exchanger has a higher pressure-bearing performance. In addition, the plate-fin heat exchanger core 1 and the end cover 2 can be firmly connected by the cooperation of a plurality of connecting slots 10 and a plurality of connecting clips 9, thereby ensuring the overall structural strength of the plate-fin heat exchanger.

[0023] Both ends of the two end covers 2 are provided with plugging covers 5, the middle parts of the bottom ends of the two end covers 2 are respectively fixedly connected with the water outlet pipe 3 and the water inlet pipe 4, a placement seat 13 is fixedly provided in the middle part of the inner side of the water inlet pipe 4, an annular seat 14 is provided inside the placement seat 13, an activated carbon filter screen 15, a fine filter screen 16 and a coarse filter screen 17 are fixedly provided inside the annular seat 14 from top to bottom, and an auxiliary pull ring 18 is fixedly provided at the bottom end of the coarse filter screen 17;

[0024] When in use, the blocking cover 5 can play a blocking role, and the activated carbon filter 15, the fine filter 16 and the coarse filter 17 are arranged to facilitate the filtration of the liquid entering the plate-fin heat exchanger core 1. By pulling the auxiliary pull ring 18 downward with a large force, the plurality of limiting spring sheets 22 are separated from the plurality of limiting grooves 23, so that the annular seat 14 and other structures can be disassembled and maintained.

[0025] A plurality of placement slots 19 are provided at the top of the inner side of the placement seat 13, and placement blocks 20 are respectively engaged with the inside of the plurality of placement slots 19, and the plurality of placement blocks 20 are fixedly connected to the annular seat 14, and a mounting slot 21 is provided on one side of the plurality of placement blocks 20, and a limiting spring sheet 22 is fixedly provided inside the plurality of mounting slots 21, and a limiting slot 23 is provided on one side of the inner wall of the plurality of placement slots 19, and the plurality of limiting spring sheets 22 are respectively engaged with the plurality of limiting slots 23, and the bottom ends of the water outlet pipe 3 and the water inlet pipe 4 are fixedly provided with connecting flanges 11, and the surfaces of the two connecting flanges 11 are provided with a plurality of fixing holes 12;

[0026] When in use, the annular seat 14 can be initially limited by the limiting engagement of several placement blocks 20 with several placement slots 19, and the annular seat 14 can be further limited by the limiting engagement of several limiting spring pieces 22 with several limiting slots 23. The setting of the connecting flange 11 facilitates the connection of the water outlet pipe 3 and the water inlet pipe 4 with other pipes.

[0027] When the embodiment of the present application is in use: by using overlapping parts 6 and overlapping grooves 8 to overlap the connection between the plate-fin heat exchanger core 1 and the end cover 2, and forming a Z-shaped overlapping seam at the overlapping joint, it is possible to avoid the internal pressure of the plate-fin heat exchanger being directly transmitted to the weld, thereby effectively reducing the pressure that the weld needs to bear. At the same time, a V-shaped chamfer 7 will be formed at the welding position between the plate-fin heat exchanger core 1 and the end cover 2, which can improve the appearance of the weld and increase the welding depth, so that the plate-fin heat exchanger has higher pressure-bearing performance, and through the coordination of a plurality of connecting slots 10 and a plurality of connecting clips 9, the plate-fin heat exchanger core 1 and the end cover 2 are conveniently connected firmly, thereby ensuring the overall structural strength of the plate-fin heat exchanger.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welded structure capable of overlapping a high-pressure-resistant plate-fin core and an end cover, comprising two end covers (2), characterized in that: A plate-fin heat exchanger core (1) is clamped between the two end covers (2); a lap groove (8) is provided at the top of the connection between the two end covers (2) and the plate-fin heat exchanger core (1) and a lap groove (8) is provided at the bottom of the connection between the two end covers (2) and the plate-fin heat exchanger core (1); a lap joint (6) is fixedly provided at the top of the connection between the plate-fin heat exchanger core (1) and the two end covers (2) and a lap joint (6) is fixedly provided at the bottom of the connection between the plate-fin heat exchanger core (1) and the two end covers (2); a chamfer (7) is provided at the connection between the plate-fin heat exchanger core (1) and the four lap joints (6); the four lap joints (6) are respectively arranged corresponding to the four lap grooves (8); a plurality of connection clamps (9) are fixedly provided at the middle of the connection between the plate-fin heat exchanger core (1) and the two end covers (2); the two end covers (2) are connected to the plate-fin heat exchanger core (1); A connection slot (10) is provided at the middle of each of the two side plates (101), and a plurality of the connection slots (10) are respectively engaged and connected with a plurality of connection clips (9). The plate-fin heat exchanger core (1) comprises two side plates (101), a plurality of first seals (102), a plurality of partitions (103), a plurality of second seals (104), a plurality of cold wave fins (105) and a plurality of hot wave fins (106). A plurality of cold wave fins (105) and a plurality of hot wave fins (106) are welded between the two side plates (101). The plurality of cold wave fins (105) and the plurality of hot wave fins (106) are alternately arranged. A partition (103) is arranged between each adjacent cold wave fin (105) and hot wave fin (106), and a first seal (102) and a second seal (104) are respectively arranged at both ends of the plurality of partitions (103).

2. A welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover according to claim 1, characterized in that: Both ends of the two end covers (2) are provided with blocking covers (5).

3. The welding structure of the overlapped strong pressure-resistant plate-fin core and the end cover according to claim 1 is characterized in that: The middle parts of the bottom ends of the two end covers (2) are respectively fixedly connected with a water outlet pipe (3) and a water inlet pipe (4); a placement seat (13) is fixedly arranged in the middle part of the inner side of the water inlet pipe (4); an annular seat (14) is arranged in engagement with the inner side of the placement seat (13); an activated carbon filter screen (15), a fine filter screen (16) and a coarse filter screen (17) are fixedly arranged in sequence from top to bottom on the inner side of the annular seat (14).

4. A welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover according to claim 3, characterized in that: An auxiliary pull ring (18) is fixedly provided at the bottom end of the coarse filter screen (17).

5. The welding structure of the overlapped strong pressure-resistant plate-fin core and the end cover according to claim 3 is characterized in that: A plurality of placement slots (19) are provided at the top of the inner side of the placement seat (13), and placement blocks (20) are respectively provided in the interior of the plurality of placement slots (19), and the plurality of placement blocks (20) are fixedly connected to the annular seat (14).

6. A welding structure capable of overlapping a strong pressure-resistant plate-fin core and an end cover according to claim 5, characterized in that: A plurality of the placement blocks (20) are provided with a mounting groove (21) on one side, a plurality of the mounting grooves (21) are fixedly provided with a limiting spring sheet (22) inside, a plurality of the placement grooves (19) are provided with a limiting groove (23) on one side of the inner wall, and a plurality of the limiting spring sheets (22) are respectively engaged and connected with a plurality of the limiting grooves (23).

7. The welding structure of the overlapped strong pressure-resistant plate-fin core and the end cover according to claim 3 is characterized in that: The bottom ends of the water outlet pipe (3) and the water inlet pipe (4) are both fixedly provided with connecting flanges (11), and the surfaces of the two connecting flanges (11) are both provided with a plurality of fixing holes (12).

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