Clamp for welding heat exchanger

Abstract

The utility model discloses a clamp for welding a heat exchanger, which comprises a support plate, a base plate and a clamp body. The clamping plates on the two sides are symmetrically arranged, and friction parts are arranged at the close ends of the clamping plates on the two sides; each dismounting device comprises a limiting block and a limiting hole; and the adjusting device comprises a limiting rod and a plurality of adjusting holes which are circumferentially distributed. The pulling parts at the front end and the rear end are pulled to drive the inserting rods at the front end and the rear end to move towards the separated ends until the limiting blocks are completely separated from the limiting holes and pulled into the through holes, limiting of the connecting blocks can be relieved, the connecting blocks drive the clamping plates to slide off from the sliding rails, and replacement and maintenance are conducted; and until the limiting rod is separated from the adjusting hole, the limiting rod is in contact with the limiting of the supporting plate, and angle adjustment is carried out.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically to a fixture for welding heat exchangers. Background Technology

[0002] Heat exchangers, also known as heat transfer devices, are key equipment used in industrial production to achieve heat transfer. They transfer heat from hot fluids to cold fluids and are widely used in processes such as heating, cooling, condensation, and evaporation. Heat exchangers come in various types, each with its unique structure and performance, and play an important role in industries such as chemical, petroleum, power, and food processing.

[0003] Heat exchanger welding fixtures are tools specifically designed for fixing and positioning welded components during the heat exchanger manufacturing process. They are designed to accommodate different types of heat exchangers, such as plate and tube types, ensuring precise alignment during welding. These fixtures are typically adjustable to accommodate heat exchanger components of varying sizes, improving welding efficiency and product quality. The fixtures are designed with ease of operation, positioning accuracy, and welding process requirements in mind, making them indispensable auxiliary tools in heat exchanger production.

[0004] The existing technology still has some problems: 1. The clamping plate of the existing clamp is usually equipped with friction parts to facilitate clamping the heat exchanger. However, after long-term use, the friction parts will be worn down and flattened, affecting the clamping ability and causing loosening. Replacement and maintenance are required, but the existing clamping plate is inconvenient to disassemble, which affects the maintenance efficiency.

[0005] 2. When welding heat exchangers, the angle of the heat exchanger needs to be adjusted according to different welding process specifications and welding standards. However, the existing clamps are not convenient for adjustment while clamped. It is necessary to release the clamps from the heat exchanger, adjust the heat exchanger, and then clamp it again, which is time-consuming and labor-intensive.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide a fixture for welding heat exchangers.

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0009] A welding fixture for heat exchangers, comprising:

[0010] A support plate, with a base plate provided below the support plate;

[0011] Several clamping plates are provided, with the clamping plates on both sides arranged symmetrically, and friction parts are provided at the near ends of the clamping plates on both sides;

[0012] Several disassembly devices, each disassembly device including a limiting block and a limiting hole, wherein the disassembly device moves out of the limiting hole through the limiting block to complete the disassembly of the clamping plate;

[0013] An adjustment device is provided, comprising a limiting rod and several circumferentially distributed adjustment holes. The adjustment device is positioned within different adjustment holes via the limiting rod to adjust the angle of the support plate.

[0014] As an improvement, a fixing plate is fixedly connected to both sides of the upper end of the support plate, a screw is threadedly connected to the middle of the fixing plate, a handwheel is fixedly connected to the disjoint ends of the screws on both sides, a connecting plate is rotatably connected to the near ends of the screws on both sides, and a telescopic rod is provided at the front and rear of the screws, with the two ends of the telescopic rods on both sides fixedly connected to the connecting plate and the fixing plate respectively.

[0015] As an improvement, slide rails are fixedly connected to the front and rear parts of the adjacent ends of the connecting plates on both sides. The front and rear slide rails are symmetrically arranged, and connecting blocks are slidably connected inside the front and rear slide rails. The clamping plate is fixedly connected to the end of the connecting block away from the connecting plate.

[0016] As an improvement, the slide rail has through holes at both the top and bottom, the limiting hole is opened at the top and bottom of the front and rear ends of the connecting block, the limiting hole and the through hole are connected, the through hole is provided with a rod, the limiting block is fixedly connected to the near ends of the front and rear rods, the limiting block is slidably connected to the inner wall of the limiting hole and the through hole, and the end of the rod away from the limiting block is fixedly connected to a pulling part.

[0017] As an improvement, the upper and lower ends of the insertion rod are provided with sliding grooves on the inner wall of the through hole. The insertion rod is slidably connected in the sliding groove. The end of the insertion rod and the inner wall of the sliding groove away from the limiting block is connected by a telescopic rod II. A spring I is sleeved on the outer side of the telescopic rod II. The two ends of the spring I are respectively fixedly connected to the insertion rod and the inner wall of the sliding groove.

[0018] As an improvement, a connecting column is fixedly connected to the middle of the lower end of the support plate, and the connecting column is rotatably connected to the middle of the upper end of the base plate. The adjustment holes are evenly opened on the outer edge of the lower end of the support plate.

[0019] As an improvement, the front part of the base plate has a cavity, the adjustment hole and the limiting rod are adapted, the lower end of the limiting rod extends through the base plate into the cavity, the lower end of the limiting rod is fixedly connected to a lifting plate, the upper front part of the lifting plate is fixedly connected to a pressing rod, and the upper end of the pressing rod extends through the cavity to its top.

[0020] As an improvement, a number of telescopic rods are fixedly connected between the lower end of the lifting plate and the inner wall of the cavity. Each of the three telescopic rods is fitted with a spring, and the upper and lower ends of the springs are fixedly connected to the lifting plate and the inner wall of the cavity, respectively.

[0021] The advantages of this utility model compared with the prior art are as follows: 1. By pulling the front and rear pull parts, the front and rear insert rods are moved toward the opposite ends until the limit block is completely disengaged from the limit hole and pulled into the through hole, the limit of the connecting block can be released. The connecting block drives the clamping plate to slide off the slide rail for replacement and maintenance, preventing loosening when clamping the heat exchanger. This can be completed without the need for disassembly tools.

[0022] 2. Press the pressing rod to push the lifting plate downwards until the limit rod disengages from the adjustment hole and contacts the limit of the support plate. Adjust the angle as needed. Then, align the upper end of the limit rod with one of the adjustment holes and release the pressing rod. Under the rebound force of the second spring, the pressing rod will return to its original position and be pushed into the adjustment hole to complete the angle fixation. This method is highly practical and can meet different welding needs without the need for multiple clamping operations. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention. Figure 1 ;

[0024] Figure 2 yes Figure 1 Enlarged view of area A in the image;

[0025] Figure 3 This is a schematic diagram of the disassembly device of this utility model;

[0026] Figure 4 This is a three-dimensional schematic diagram of the present invention. Figure 2 ;

[0027] Figure 5 This is a cross-sectional view of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of area B in the image;

[0029] As shown in the figure: 1. Support plate; 2. Base plate; 3. Clamping plate; 4. Disassembly device; 5. Limiting block; 6. Limiting hole; 7. Adjustment device; 8. Limiting rod; 9. Adjustment hole; 10. Fixing plate; 11. Screw; 12. Handwheel; 13. Connecting plate; 14. Telescopic rod one; 15. Slide rail; 16. Connecting block; 17. Through hole; 18. Pulling part; 19. Slide groove; 20. Telescopic rod two; 21. Spring one; 22. Connecting column; 23. Cavity; 24. Lifting plate; 25. Pressing rod; 26. Telescopic rod three; 27. Spring two; 28. Insert rod. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Combined with appendix Figures 1-6 A welding fixture for heat exchangers mainly includes: a support plate 1, several clamping plates 3, several disassembly devices 4, and an adjustment device 7. A base plate 2 is provided below the support plate 1, the radius of which is larger than the radius of the support plate 1. The clamping plates 3 are symmetrically arranged on both sides, and friction parts are provided at the near ends of the clamping plates 3. The disassembly device 4 includes a limiting block 5 and a limiting hole 6. The disassembly device 4 moves out of the limiting hole 6 through the limiting block 5 to complete the disassembly of the clamping plates 3.

[0032] Specifically, a fixing plate 10 is fixedly connected to both sides of the upper end of the support plate 1. A screw 11 is threadedly connected to the middle of the fixing plate 10. A handwheel 12 is fixedly connected to the disjoint ends of the two screws 11. A connecting plate 13 is rotatably connected to the near ends of the two screws 11. A telescopic rod 14 is provided at the front and rear of the screw 11. The two ends of the telescopic rod 14 are fixedly connected to the connecting plate 13 and the fixing plate 10 respectively. By rotating the handwheels 12 on both sides, the screws 11 on both sides move towards the near ends, driving the clamping plates 3 on both sides to clamp the heat exchanger. When the telescopic rod 14 extends and retracts, it guides the movement of the clamping plates 3.

[0033] Next, slide rails 15 are fixedly connected to the front and rear parts of the near ends of the connecting plates 13 on both sides. The slide rails 15 are L-shaped and the front and rear slide rails 15 are symmetrically arranged. Connecting blocks 16 are slidably connected inside the front and rear slide rails 15. Connecting blocks 16 are T-shaped. Clamping plates 3 are fixedly connected to the end of the connecting blocks 16 away from the connecting plates 13. Through holes 17 are opened on the upper and lower parts of the slide rails 15. Limiting holes 6 are opened on the upper and lower parts of the front and rear ends of the connecting blocks 16. The limiting holes 6 and the through holes 17 are connected. Insert rods 28 are provided in the through holes 17. Limiting blocks 5 are fixedly connected to the near ends of the front and rear insert rods 28. Limiting blocks 5 are slidably connected to the inner walls of the limiting holes 6 and the through holes 17. Pulling parts 18 are fixedly connected to the end of the insert rods 28 away from the limiting blocks 5.

[0034] Furthermore, the upper and lower sides of the insertion rod 28 are provided with sliding grooves 19 on the inner wall of the through hole 17. The insertion rod 28 is slidably connected in the sliding groove 19. The end of the insertion rod 28 and the inner wall of the sliding groove 19 away from the limiting block 5 is connected by a telescopic rod 20. A spring 21 is sleeved on the outside of the telescopic rod 20. The two ends of the spring 21 are respectively fixedly connected to the insertion rod 28 and the inner wall of the sliding groove 19.

[0035] After prolonged use, the friction parts of the clamping plate 3 become worn. To prevent the heat exchanger from loosening when clamping it, the front and rear pull parts 18 are pulled, causing the front and rear insertion rods 28 to move towards the opposite ends. The limiting block 5 slides within the limiting hole 6 and gradually disengages from the limiting hole 6. During this process, the first spring 21 and the second telescopic rod 20 are compressed until the limiting block 5 is completely disengaged from the limiting hole 6 and pulled into the through hole 17. Then, the limiting of the connecting block 16 can be released. The connecting block 16 then causes the clamping plate 3 to slide off the slide rail 15 for replacement and maintenance. This process is simple, quick, and can be completed without the need for disassembly tools.

[0036] Then, the adjustment device 7 includes a limiting rod 8 and several circumferentially distributed adjustment holes 9. The adjustment device 7 is set in different adjustment holes 9 through the limiting rod 8 to complete the angle adjustment of the support plate 1. A connecting column 22 is fixedly connected to the middle of the lower end of the support plate 1. The connecting column 22 is rotatably connected to the middle of the upper end of the base plate 2. The adjustment holes 9 are evenly opened on the outer edge of the lower end of the support plate 1. A cavity 23 is opened at the front of the base plate 2. The adjustment holes 9 and the limiting rod 8 are adapted. The lower end of the limiting rod 8 passes through the base plate 2 and extends into the cavity 23. A lifting plate 24 is fixedly connected to the lower end of the limiting rod 8. A pressing rod 25 is fixedly connected to the front of the upper end of the lifting plate 24. The upper end of the pressing rod 25 passes through the cavity 23 and extends above it. Several telescopic rods 26 are fixedly connected between the lower end of the lifting plate 24 and the inner wall of the cavity 23. Springs 27 are sleeved on the outer side of each telescopic rod 26. The upper and lower ends of the springs 27 are fixedly connected to the lifting plate 24 and the inner wall of the cavity 23, respectively.

[0037] When the angle of the heat exchanger needs to be adjusted, with the angle of the support plate 1 fixed, the upper end of the limiting rod 8 extends into one of the adjustment holes 9. By pressing the pressing rod 25, the lifting plate 24 is pressed down, compressing the second spring 27 and the third telescopic rod 26 in the process, until the limiting rod 8 disengages from the adjustment hole 9 and contacts the limit of the support plate 1, then the angle can be adjusted. After the adjustment is completed, align the upper end of the limiting rod 8 with one of the adjustment holes 9, and then release the pressing rod 25. Under the rebound force of the second spring 27, the pressing rod 25 is reset and pushed into the adjustment hole 9, completing the angle fixation. This method is highly practical and can meet different welding requirements.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A clamp for heat exchanger welding, characterized by, include: Support plate (1), and a base plate (2) is provided below the support plate (1); Several clamping plates (3) are provided, with the clamping plates (3) on both sides arranged symmetrically, and friction parts are provided at the close ends of the clamping plates (3) on both sides; Several disassembly devices (4) are provided, each including a limiting block (5) and a limiting hole (6). The disassembly device (4) moves out of the limiting hole (6) through the limiting block (5) to complete the disassembly of the clamping plate (3). Adjustment device (7), the adjustment device (7) includes a limiting rod (8) and a number of circumferentially distributed adjustment holes (9). The adjustment device (7) is set in different adjustment holes (9) through the limiting rod (8) to complete the angle adjustment of the support plate (1).

2. The heat exchanger welding jig according to claim 1, characterized by: The support plate (1) is fixedly connected to two fixed plates (10) on both sides of the upper end. The fixed plate (10) is threadedly connected to a screw (11) in the middle. The screws (11) on both sides are fixedly connected to handwheels (12) at their disjoint ends. The screws (11) on both sides are rotatably connected to connecting plates (13) at their close ends. Telescopic rods (14) are provided at the front and rear of the screws (11). The telescopic rods (14) on both sides are fixedly connected to the connecting plate (13) and the fixed plate (10) at both ends respectively.

3. The heat exchanger welding jig according to claim 2, characterized by: The front and rear ends of the connecting plates (13) on both sides are fixedly connected to slide rails (15). The front and rear slide rails (15) are symmetrically arranged. A connecting block (16) is slidably connected inside the front and rear slide rails (15). The clamping plate (3) is fixedly connected to the end of the connecting block (16) away from the connecting plate (13).

4. The heat exchanger welding jig according to claim 3, characterized by: The slide rail (15) has through holes (17) at both the top and bottom. The limiting hole (6) is located at the top and bottom of the front and rear ends of the connecting block (16). The limiting hole (6) and the through hole (17) are connected. A rod (28) is provided in the through hole (17). The limiting block (5) is fixedly connected to the near ends of the front and rear rods (28). The limiting block (5) is slidably connected to the inner wall of the limiting hole (6) and the through hole (17). A pulling part (18) is fixedly connected to the end of the rod (28) away from the limiting block (5).

5. The heat exchanger welding fixture of claim 4, wherein: The insertion rod (28) is provided with a sliding groove (19) on the inner wall of the through hole (17) at both the top and bottom. The insertion rod (28) is slidably connected in the sliding groove (19). The end of the insertion rod (28) and the inner wall of the sliding groove (19) away from the limiting block (5) is connected by a telescopic rod (20). A spring (21) is sleeved on the outside of the telescopic rod (20). The two ends of the spring (21) are respectively fixedly connected to the insertion rod (28) and the inner wall of the sliding groove (19).

6. The heat exchanger welding fixture of claim 1, wherein: A connecting column (22) is fixedly connected to the middle of the lower end of the support plate (1). The connecting column (22) is rotatably connected to the middle of the upper end of the base plate (2). The adjustment holes (9) are evenly opened on the outer edge of the lower end of the support plate (1).

7. The heat exchanger welding fixture of claim 6, wherein: The bottom plate (2) is opened in the front cavity (23), the adjusting hole (9) and the limiting rod (8) are matched, the lower end of the limiting rod (8) extends to the cavity (23) through the bottom plate (2), the lower end of the limiting rod (8) is fixedly connected with the lifting plate (24), the front end of the upper end of the lifting plate (24) is fixedly connected with the pressing rod (25), and the upper end of the pressing rod (25) extends to above the cavity (23) through the cavity (23).

8. The heat exchanger welding fixture of claim 7, wherein: The lower end of the lifting plate (24) and the inner wall of the cavity (23) are connected by a plurality of telescopic rods three (26) through fixed connection, the outer side of the telescopic rod three (26) is sleeved with a spring two (27) connection, and the upper and lower ends of the spring two (27) are fixedly connected to the lifting plate (24) and the inner wall of the cavity (23) respectively.

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