Welding device for all-welded heat exchange plate group

Abstract

The utility model relates to the technical field of all-welded heat exchange plate group welding devices, in particular to an all-welded heat exchange plate group welding device which comprises a welding mechanism, a conveying mechanism, a pressing mechanism and a heat exchange plate group. A pressing mechanism is arranged on the left side of the conveying mechanism, a heat exchange plate set is clamped above the pressing mechanism, and a welding mechanism is arranged on the rear side of the pressing mechanism. According to the device, a heat exchange plate set to be welded can be clamped through cooperation of the conveying mechanism and the pressing mechanisms, the pressing mechanisms press the heat exchange plate set in a left batch and a right batch, welding is facilitated, meanwhile, displacement in the welding process can be prevented, the conveying mechanism comprises an up-down lifting mechanism set, the height can be adjusted according to the number of heat exchange plates, and the welding efficiency is improved. Therefore, transportation is more flexible, plate materials cannot be damaged, the heat exchange plate set has the function of preventing thermal expansion and cold contraction, and the problems of tube plate deformation and welding quality defects are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding devices for fully welded heat exchange plate groups, in particular to a new type of fully welded heat exchange plate group that prevents thermal expansion and contraction. Background Art

[0002] The existing fully welded plate heat exchanger plate group uses A plates and B plates stacked in pairs and butt welded at the ends. As Figure 1 shown, in actual working conditions with large temperature differences, thermal expansion and contraction easily lead to cracking of the weld seams and leakage risks. To solve the above problems, the shape and structure of the fully welded heat exchange plate group are adjusted, and the corrugated A plates are butt welded to the corrugated B plates, as Figure 2 described, which fully solves the problem of weld seam cracking caused by thermal expansion and contraction, greatly improves the service life of the equipment, effectively improves the product quality, and also reduces the after-sales maintenance rate.

[0003] The existing fully welded heat exchange plate group welding device has defects such as tube sheet deformation and welding quality defects. The reason is probably that during the welding process, the temperature distribution is uneven, resulting in tube sheet deformation. The weld seam and the welding side are high-temperature areas, and the shrinkage amount after cooling is large, while the shrinkage amount in the low-temperature area is small. This imbalance causes the shape of the tube sheet to change, inaccurate welding positioning, and defects caused by displacement during the welding process. Now, a device is needed that can accurately position and confirm no displacement during the welding process, and can control the free movement of the welding torch to automatically repeat welding of the heat exchange plate group. Summary of the Utility Model

[0004] In order to overcome the existing deficiencies, the utility model provides a fully welded heat exchange plate group welding device.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a fully welded heat exchange plate group welding device, including a welding mechanism, a conveying mechanism, a pressing mechanism, and a heat exchange plate group; the pressing mechanism is arranged on the left side of the conveying mechanism, the heat exchange plate group is clamped above the pressing mechanism, and the welding mechanism is arranged at the rear; the welding mechanism includes a welding base, a sliding table, guide rails, a drag chain, a gear set, a motor, a gun cleaning and wire cutting machine, and an arc welding industrial robot. The welding base is provided with a pair of guide rails, the drag chain is arranged inside the guide rails, and the sliding table is slidably connected above the guide rails; the sliding table is provided with a motor, a gun cleaning and wire cutting machine, and an arc welding industrial robot. The output shaft of the motor is connected to the gear set, and the gear set meshes with the drag chain; the pressing mechanism includes an operating table, a stop block, an intermediate pressing mechanism, an edge clamping mechanism, and an infrared counter. The stop block and the infrared counter are arranged at the top left end of the operating table, several groups of edge clamping mechanisms are arranged on the right side, and several groups of intermediate pressing mechanisms are arranged on the front and rear sides.

[0006] According to another embodiment of the present utility model, it further includes that the conveying mechanism comprises two groups of conveyors. Each group of conveyors includes a frame, a lifting mechanism and a conveying device. The lifting mechanism is installed on the frame, and the conveying device is slidably connected to the lifting mechanism.

[0007] According to another embodiment of the present utility model, it further includes that the conveying device comprises a base, a driving device, a plurality of rollers, rotating gears corresponding to the rollers one by one, and a conveyor belt. The rotating gears are installed inside the base. One end of the roller is rotatably installed inside the base, and the other end is connected to the rotating gear. The rotating gear is in transmission connection with the conveyor belt. The conveyor belt is connected to the driving device, and the driving device is fixed below the base. The base is slidably connected to the lifting mechanism.

[0008] According to another embodiment of the present utility model, it further includes that the lifting mechanism comprises a lifting plate, a slide rail and a rodless cylinder. There are two groups of slide rails, which are fixed on one side of the frame, and a rodless cylinder is arranged in the middle. The rodless cylinder is slidably connected to the lifting plate. The base is fixed on the side of the lifting plate.

[0009] According to another embodiment of the present utility model, it further includes that the intermediate pressing mechanism comprises an intermediate machine base, an intermediate cylinder, a middle column pressing hinge rod and a middle column pressing head. The intermediate machine base is fixed on the side of the operating table. An intermediate cylinder is arranged on the intermediate machine base far away from the operating table. The middle of the middle column pressing hinge rod is rotatably connected to the intermediate machine base close to the operating table through an H hinge. One end of the middle column pressing hinge rod is connected to the output shaft of the intermediate cylinder, and the other end is provided with a middle column pressing head.

[0010] According to another embodiment of the present utility model, it further includes that the edge pressing mechanism comprises an edge machine base, an edge cylinder, an edge clamping hinge rod and a profiling pressing head. The edge machine base is fixed on the side of the operating table. An edge cylinder is installed on the edge machine base far away from the operating table. The middle of the edge clamping hinge rod is rotatably connected to the edge machine base close to the operating table through an H hinge. One end of the edge clamping hinge rod is connected to the output rod of the edge cylinder, and the other end is provided with a profiling pressing head.

[0011] The beneficial effect of the present utility model is that the device can clamp the heat exchange plate group to be welded through the cooperation of the conveying mechanism and the pressing mechanism. The pressing mechanism presses in two batches from left and right, which is convenient for welding and can also prevent displacement during the welding process. The conveying mechanism includes an up-and-down lifting mechanism group, which can adjust the height according to the number of heat exchange plates, making the transportation more flexible and not damaging the plate materials, enabling the heat exchange plate group to have the function of preventing thermal expansion and contraction and solving the problems of tube plate deformation and welding quality defects. Description of the Drawings

[0012] The present utility model will be further described below with reference to the drawings and embodiments.

[0013] Figure 1 is a welded sectional view of the existing heat exchange plate group;

[0014] Figure 2 is a sectional view of the fully welded heat exchange plate group for preventing thermal expansion and contraction;

[0015] Figure 3 Top view of the utility model;

[0016] Figure 4 is the front view of the utility model;

[0017] Figure 5 is the side view of the welding mechanism;

[0018] Figure 6 is the side view of the pressing mechanism.

[0019] In the figure: 1. Welding mechanism, 2. Conveying mechanism, 3. Pressing mechanism, 4. Heat exchange plate group, 5. Welding base, 6. Slide table, 7. Guide rail, 8. Drag chain, 9. Gear set, 10. Motor, 11. Gun cleaning and wire cutting machine, 12. Arc welding industrial robot, 13. Operating table, 14. Stop block, 15. Edge clamping mechanism, 16. Intermediate pressing mechanism, 17. Infrared counter, 18. Frame, 19. Lifting mechanism, 20. Conveying device, 21. Intermediate machine base, 22. Intermediate cylinder, 23. Intermediate column pressing hinge rod, 24. Intermediate column pressing head, 25. Edge machine base, 26. Edge cylinder, 27. Edge clamping hinge rod, 28. Profiled pressing head. Detailed implementation manners

[0020] As Figure 3 is the structural schematic diagram of the utility model. A fully welded heat exchange plate group welding device includes a welding mechanism 1, a conveying mechanism 2, a pressing mechanism 3 and a heat exchange plate group 4; the pressing mechanism 3 is arranged on the left side of the conveying mechanism 2, the heat exchange plate group 4 is clamped above the pressing mechanism 3, and the welding mechanism 1 is arranged at the rear side; the welding mechanism 1 includes a welding base 5, a slide table 6, a guide rail 7, a drag chain 8, a gear set 9, a motor 10, a gun cleaning and wire cutting machine 11 and an arc welding industrial robot 12. The guide rails 7 are arranged in pairs on the welding base 5, the drag chain 8 is arranged inside the guide rails 7, and the slide table 6 is slidably connected above the guide rails 7; the motor 10, the gun cleaning and wire cutting machine 11 and the arc welding industrial robot 12 are arranged on the slide table 6, the output shaft of the motor 10 is connected to the gear set 9, and the gear set 9 meshes with the drag chain 8; the pressing mechanism 3 includes an operating table 13, a stop block 14, an intermediate pressing mechanism 16, an edge clamping mechanism 15 and an infrared counter. The stop block 14 and the infrared counter 17 are arranged at the top left end of the operating table 13, several groups of edge clamping mechanisms 15 are arranged on the right side, and several groups of intermediate pressing mechanisms 16 are arranged on the front and rear sides.

[0021] In the specific operation process, the heat exchange plate group 4 is sent to the operation table 13 of the pressing mechanism 3 through the conveying mechanism 2. The infrared counter 17 at the edge counts the number of plates, and then the variable pressure clamping mechanism 15 cooperates with the stop block 14 to clamp and fix the heat exchange plate group 4. The middle pressing mechanism 16 cooperates with the welding mechanism 1 to perform edge welding. The motor 10 controls the gear set 9 to rotate on the Torlan 8, so that the sliding table 6 slides on the guide rail 7, enabling the arc welding industrial robot 12 to weld the edge.

[0022] According to another embodiment of the present invention, it further includes that the conveying mechanism 2 includes two groups of conveyors. Each group of conveyors includes a frame 18, a lifting mechanism 19, and a conveying device 20. The lifting mechanism 19 is installed on the frame 18, and the conveying device 20 is slidably connected to the lifting mechanism 19.

[0023] According to another embodiment of the present invention, it further includes that the conveying device 20 includes a base, a driving device, a plurality of rollers, rotation gears corresponding to the rollers one by one, and a conveyor belt. The rotation gears are installed inside the base. One end of the roller is rotatably installed inside the base, and the other end is connected to the rotation gear. The rotation gear is in transmission connection with the conveyor belt, and the conveyor belt is connected to the driving device. The driving device is fixed below the base. The base is slidably connected to the lifting mechanism 19.

[0024] Specifically, the driving device drives the conveyor belt to rotate, thereby controlling the rotation of the rotation gears. When the rotation gears rotate, the rollers arranged on the base rotate, enabling the heat exchange plates placed on the rollers to be conveyed.

[0025] According to another embodiment of the present invention, it further includes that the lifting mechanism 19 includes a lifting plate, a slide rail, and a rodless cylinder. There are two groups of slide rails, which are fixed on one side of the frame 18, and a rodless cylinder is arranged in the middle. The rodless cylinder is slidably connected to the lifting plate. The base is fixed on the side of the lifting plate.

[0026] Specifically, contact switches are arranged at the upper and lower ends of the slide rail. The rodless cylinder controls the up and down sliding of the lifting plate, so that the conveying device 20 also moves up and down, and cooperates with the heat exchange plate group 4 on the operation table 13 to adjust the height.

[0027] According to another embodiment of the present invention, it further includes that the middle pressing mechanism 16 includes a middle machine base 21, a middle cylinder 22, a middle column pressing hinge rod 23, and a middle column pressing head 24. The middle machine base 21 is fixed on the side of the operation table 13. A middle cylinder 22 is arranged on the middle machine base 21 far away from the operation table 13. The middle column pressing hinge rod 23 is rotatably connected to the middle of the middle machine base 21 close to the operation table 13 through an H hinge. One end of the middle column pressing hinge rod 23 is connected to the output shaft of the middle cylinder 22, and the other end is provided with a middle column pressing head 24.

[0028] Specifically, the output shaft of the middle cylinder 22 drives the middle column pressing hinge rod 23 to rotate around the H hinge, and the position of the middle column pressing head 24 of the middle column pressing hinge rod 23 is adjusted according to the number of heat exchange plates 4, so as to perform pressing from above.

[0029] According to another embodiment of the present invention, it further includes that the edge pressing mechanism 3 includes an edge machine base 25, an edge cylinder 26, an edge clamping hinge rod 27 and a profiling pressing head 28; the edge machine base 25 is fixed on the side of the operation table 13, and an edge cylinder 26 is installed on the edge machine base 25 away from the operation table 13, and the middle of the edge clamping hinge rod 27 is rotationally connected to the edge machine base 25 close to the operation table 13 through an H hinge, one end of the edge clamping hinge rod 27 is connected to the output rod of the edge cylinder 26, and the other end is provided with a profiling pressing head 28.

[0030] Specifically, the output rod of the edge cylinder 26 drives the edge clamping hinge rod 27 to rotate around the H hinge, so that the profiling pressing head 28 at the top of the edge clamping hinge rod 27 performs pressing.

[0031] The above description is illustrative rather than restrictive to the present invention. Those of ordinary skill in the art understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all of them will fall within the protection scope of the present invention.

Claims

1. A fully welded heat exchange plate pack welding device, characterized in that It includes a welding mechanism (1), a conveying mechanism (2), a pressing mechanism (3) and a heat exchange plate group (4); the pressing mechanism (3) is arranged on the left side of the conveying mechanism (2), the heat exchange plate group (4) is clamped above the pressing mechanism (3), and the welding mechanism (1) is arranged at the rear side; the welding mechanism (1) includes a welding base (5), a sliding table (6), guide rails (7), a drag chain (8), a gear set (9), a motor (10), a gun cleaning and wire cutting machine (11) and an arc welding industrial robot (12), the guide rails (7) are arranged in pairs on the welding base (5), the drag chain (8) is arranged inside the guide rails (7), and the sliding table (6) is slidably connected above the guide rails (7); the motor (10), the gun cleaning and wire cutting machine (11) and the arc welding industrial robot (12) are arranged on the sliding table (6), the output shaft of the motor (10) is connected to the gear set (9), and the gear set (9) meshes with the drag chain (8); the pressing mechanism (3) includes an operating table (13), a stop block (14), an intermediate pressing mechanism (16), an edge clamping mechanism (15) and an infrared counter, the stop block (14) and the infrared counter (17) are arranged at the top left of the operating table (13), several groups of edge clamping mechanisms (15) are arranged on the right side, and several groups of intermediate pressing mechanisms (16) are arranged on the front and rear sides.

2. The welding device for the all-welded heat exchange plate pack according to claim 1, characterized in that, The conveying mechanism (2) includes two groups of conveyors, and each group of conveyors includes a frame (18), a lifting mechanism (19) and a conveying device (20), the lifting mechanism (19) is installed on the frame (18), and the conveying device (20) is slidably connected to the lifting mechanism (19).

3. The welding device for the fully welded heat exchange plate group according to claim 2, characterized in that, The conveying device (20) includes a base, a driving device, several rollers, rotating gears corresponding to the rollers one by one and a conveyor belt, the rotating gears are installed inside the base, one end of the roller is rotatably installed inside the base, the other end is connected to the rotating gear, the rotating gear is in transmission connection with the conveyor belt, the conveyor belt is connected to the driving device, and the driving device is fixed below the base; the base is slidably connected to the lifting mechanism (19).

4. The welding device for the all-welded heat exchange plate group according to claim 2, characterized in that, The lifting mechanism (19) includes a lifting plate, a slide rail and a rodless cylinder; there are two groups of slide rails, which are fixed on one side of the frame (18), and a rodless cylinder is arranged in the middle; the rodless cylinder is slidably connected to the lifting plate; the base is fixed on the side of the lifting plate.

5. The all-welded heat exchange plate group welding device according to claim 1, characterized in that, The intermediate pressing mechanism (16) includes an intermediate base (21), an intermediate cylinder (22), a middle column pressing hinge rod (23) and a middle column pressing head (24); the intermediate base (21) is fixed on the side of the operating table (13), the intermediate cylinder (22) is arranged on the intermediate base (21) far from the operating table (13), and the middle of the middle column pressing hinge rod (23) is rotatably connected to the intermediate base (21) close to the operating table (13) through an H hinge; one end of the middle column pressing hinge rod (23) is connected to the output shaft of the intermediate cylinder (22), and the other end is provided with the middle column pressing head (24).

6. The welding device for the fully welded heat exchange plate pack according to claim 1, characterized in that, The edge pressing mechanism (3) includes an edge base (25), an edge cylinder (26), an edge clamping hinge rod (27), and a profiling punch (28); the edge base (25) is fixed on the side of the operation table (13), an edge cylinder (26) is installed on the edge base (25) away from the operation table (13), the middle of the edge clamping hinge rod (27) is rotatably connected to the edge base (25) close to the operation table (13) through an H hinge, one end of the edge clamping hinge rod (27) is connected to the output rod of the edge cylinder (26), and the other end is provided with a profiling punch (28).

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