Welding positioning tool for heat exchanger cylinder

Abstract

The utility model discloses a welding positioning tool for a heat exchanger cylinder, which comprises a working table, and first electric push rods are fixedly connected to two ends of the bottom of the working table. In the actual use process, the second electric push rods are arranged on the two sides of the outer barrel, the pressing plates are pushed to fix the heat exchanger barrel and prevent the heat exchanger barrel from shaking, then the first electric push rods are started to push the bases on the limiting sliding blocks to move, and therefore the outer barrel where the heat exchanger barrel is placed is driven to be close to the middle, and barrel butt joint is achieved; the outer barrel is limited in the limiting groove through the limiting ring, the moving stability of the outer barrel is guaranteed, after butt joint is completed, the first motor is started to drive the small gear on the rotating shaft to rotate, the small gear drives the gear ring, then the outer barrel and the barrel body of the heat exchanger in the barrel are driven to rotate, and all-directional welding is facilitated; the problems that in an existing device, a heat exchanger barrel is inaccurate in positioning and prone to shaking during welding are solved, and the traditional device depends on manual positioning and barrel rotating, so that efficiency is low, and the position is unstable.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger shell processing technology, specifically a welding positioning fixture for heat exchanger shells. Background Technology

[0002] A welding positioning fixture for heat exchanger shells is a key auxiliary device during the welding process. It consists of a positioning mechanism, a clamping mechanism, and a support base. The support base provides stable support, ensuring the overall stability of the fixture. The positioning mechanism is designed according to the shape and size of the shell, precisely determining the position of each part of the shell through positioning pins and slots, such as pre-set matching positioning structures for the shell pipe openings and flanges, ensuring accurate installation. The clamping mechanism quickly fixes the components after positioning, preventing displacement during welding. It can employ various clamping methods such as bolts and hydraulic clamps to provide reliable clamping force. This fixture significantly improves welding accuracy, reduces manual positioning errors, ensures weld quality, and makes heat exchanger shell welding efficient and stable, ultimately improving the overall performance of the heat exchanger.

[0003] A search revealed that Chinese patent CN216758799U discloses a heat exchanger welding positioning device and a heat exchanger welding equipment. This patent describes a base with a channel extending in the front-to-back direction for placing the heat exchanger; two round shafts are located on the left and right sides of the channel to support the heat exchanger, and are rotatably connected to the base in the same direction; a drive assembly is used to drive the round shafts to rotate. The welding positioning device supports the heat exchanger cylinder through the two round shafts, ensuring that all cylinders placed on the shafts are coaxial, thus ensuring accurate welding. The positioning device has a simple structure and low cost. However, in actual use, the positioning device struggles to stably position multiple cylinders during welding, especially when the heat exchanger cylinder is lightweight, making it prone to wobbling during the welding process.

[0004] In this solution, when workers are welding the heat exchanger shell, the positioning device used is a simple roller for positioning and conveying. However, this device cannot fix the heat exchanger shell, which leads to slippage and rotation during welding, resulting in inaccurate welding or welding errors. To solve this technical problem, this utility model proposes a welding positioning fixture for the heat exchanger shell. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In this solution, when workers are welding the heat exchanger shell, the positioning device used is a simple roller for positioning and conveying. However, this device cannot fix the heat exchanger shell, which leads to slippage and rotation during welding, resulting in inaccurate welding or welding errors. To solve this technical problem, this utility model proposes a welding positioning fixture for the heat exchanger shell.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a welding positioning fixture for a heat exchanger cylinder, comprising a worktable, with an electric push rod fixedly connected to both ends of the bottom of the worktable, a limit slider fixedly connected to the output end of each electric push rod, a base fixedly connected to the top of each limit slider, and an outer cylinder fixedly connected to the top of the base, a pair of mounting plates fixedly connected to the outer wall of the base, a motor fixedly connected to the outer wall of one of the mounting plates, a rotating shaft fixedly connected to the output end of the motor, a small gear fixedly connected to the outer wall of the rotating shaft, a gear ring fixedly connected to the outer wall of the outer cylinder, and the gear ring meshing with the small gear, the outer cylinder being rotatably connected to the base.

[0009] Preferably, each of the outer cylinders has multiple electric push rods fixedly connected to its two side walls, and each of the electric push rods has a pressure plate fixedly connected to its output end.

[0010] Preferably, a pair of fixed plates are fixedly connected to one side of the workbench, a second motor is fixedly connected to the outer wall of one side of the fixed plate, a threaded rod is fixedly connected to the output end of the second motor, a bracket is threadedly connected to the outer wall of the threaded rod, an electro-hydraulic rod is fixedly connected to the top of the bracket, and a welding gun is fixedly connected to the output end of the electro-hydraulic rod.

[0011] Preferably, each outer cylinder has a pair of limiting rings fixedly connected to its outer side wall, and each base has a pair of limiting grooves inside, with the limiting rings corresponding to the limiting grooves, and the limiting rings being slidably connected within the limiting grooves.

[0012] Preferably, a sliding groove is fixedly connected to the inner side wall of the bracket, and a limit block is provided on one side of the worktable, while the sliding groove is slidably connected within the limit block.

[0013] Preferably, an electric lifting rod is fixedly connected to the top of the workbench, and a support plate is fixedly connected to the output end of the electric lifting rod.

[0014] (III) Beneficial Effects

[0015] This utility model provides a welding positioning fixture for a heat exchanger shell. It has the following advantages:

[0016] (1) Electric push rods two are located on both sides of the outer cylinder. They push the pressure plate to fix the heat exchanger cylinder and prevent it from shaking. Then, electric push rod one is started to push the base on the limit slider to move, thereby driving the outer cylinder on which the heat exchanger cylinder is placed to move closer to the middle and realize the cylinder docking. The outer cylinder is limited in the limit groove by the limit ring to ensure its movement stability. After docking, motor one is started and drives the small gear on the rotating shaft to rotate. The small gear drives the gear ring, which in turn drives the outer cylinder and the heat exchanger cylinder inside the cylinder to rotate, so as to weld in all directions. These components work together to solve the problem of inaccurate positioning and easy shaking of the heat exchanger cylinder during welding in the existing device. The traditional device relies on manual positioning and rotation of the cylinder, which is not only inefficient but also unstable in position.

[0017] (2) After the second motor is turned on, it drives the threaded rod to rotate. The threaded rod is connected to the bracket. Through the threaded transmission, the bracket is driven to move left and right in the sliding groove of the limiting block. Due to the cooperation between the limiting block and the sliding groove, the bracket can only move in a specific direction, ensuring the accuracy of the movement trajectory. An electric hydraulic rod is installed on the bracket, and the end of the electric hydraulic rod is connected to the welding gun. After the bracket moves and adjusts the horizontal position of the welding gun, the electric hydraulic rod is started. It can flexibly control the position of the welding gun in the vertical direction, so that the welding gun accurately reaches the welding joint of the heat exchanger shell for welding operation. This series of components work together to solve the problem of inaccurate positioning and difficulty in flexibly adjusting the position of the welding gun in the existing welding device. The traditional device requires manual adjustment of the welding gun position, which is not only inefficient but also has a large positional deviation, resulting in inconsistent welding quality. This device achieves precise control of the welding gun position through the cooperation of the motor, threaded rod and hydraulic rod, which significantly improves the welding quality and work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the front structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the top structure of the base of this utility model.

[0022] In the diagram: 1. Workbench; 2. Electric push rod one; 3. Limiting slider; 4. Base; 5. Outer cylinder; 6. Limiting ring; 7. Gear ring; 8. Mounting plate; 9. Motor one; 10. Rotating shaft; 11. Pinion; 12. Limiting groove; 13. Electric push rod two; 14. Pressure plate; 15. Fixing plate; 16. Motor two; 17. Threaded rod; 18. Bracket; 19. Limiting block; 20. Slide groove; 21. Electro-hydraulic rod; 22. Welding torch; 23. Electric lifting rod; 24. Support plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] Example 1: A welding positioning fixture for a heat exchanger shell includes a worktable 1. Electric push rods 2 are fixedly connected to both ends of the bottom of the worktable 1. A limit slider 3 is fixedly connected to the output end of each electric push rod 2. A base 4 is fixedly connected to the top of each limit slider 3, and an outer cylinder 5 is fixedly connected to the top of the base 4. A pair of mounting plates 8 are fixedly connected to the outer wall of the base 4. A motor 9 is fixedly connected to the outer wall of one mounting plate 8. A rotating shaft 10 is fixedly connected to the output end of the motor 9. A small gear 11 is fixedly connected to the outer wall of the rotating shaft 10. A... A gear ring 7 meshes with a pinion 11. The outer cylinder 5 is rotatably connected to the base 4. Multiple electric push rods 13 are fixedly connected to both sides of each outer cylinder 5. A pressure plate 14 is fixedly connected to the output end of each electric push rod 13. A pair of limiting rings 6 are fixedly connected to the outer side of each outer cylinder 5. A pair of limiting grooves 12 are opened inside each base 4, and the limiting rings 6 correspond to the limiting grooves 12. At the same time, the limiting rings 6 are slidably connected in the limiting grooves 12. An electric lifting rod 23 is fixedly connected to the top of the worktable 1. A support plate 24 is fixedly connected to the output end of the electric lifting rod 23.

[0026] First, place the two heat exchanger shells to be welded inside the outer shell 5. Next, activate the electric push rods 13 on both sides of the outer shell 5. The electric push rods 13 push the pressure plate 14 to firmly fix the heat exchanger shells. Activate the electric push rods 2 on both sides of the bottom of the workbench 1. These push the base 4 on the limit slider 3 to move towards the center. The base 4 drives the outer shell 5 and the heat exchanger shells inside to move towards the support plate 24. After the welding parts of the heat exchanger shells on both sides are successfully connected, activate the electric lifting rod 23 to move the support plate 24 upward to provide stable support for the welding joint of the heat exchanger shells. Activate the motor 9 on the outer wall of the mounting plate 8. The motor 9 drives the small gear 11 on the outer wall of the rotating shaft 10 to rotate. The small gear drives the gear ring 7, which in turn drives the outer shell 5 and the heat exchanger shells inside to rotate together. When the outer cylinder 5 rotates, it is limited by the limiting ring 6 in the limiting groove 12. Through the coordinated operation of these components, the heat exchanger cylinder is quickly positioned, which effectively avoids the problem of cylinder sliding and displacement during the welding process and greatly improves work efficiency.

[0027] Example 2: The difference between this example and Example 1 is that a pair of fixed plates 15 are fixedly connected to one side of the workbench 1, a motor 2 16 is fixedly connected to the outer wall of the fixed plate 15, a threaded rod 17 is fixedly connected to the output end of the motor 2 16, a bracket 18 is threadedly connected to the outer wall of the threaded rod 17, an electric hydraulic rod 21 is fixedly connected to the top of the bracket 18, a welding gun 22 is fixedly connected to the output end of the electric hydraulic rod 21, a sliding groove 20 is fixedly connected to the inner wall of the bracket 18, a limit block 19 is opened on one side of the workbench 1, and the sliding groove 20 is slidably connected to the limit block 19.

[0028] The motor 16 on the outer wall of the fixed plate 15 is activated. The operation of the motor 16 drives the threaded rod 17 to rotate, and as the threaded rod rotates, the bracket 18 that cooperates with it moves left and right. Since the bracket is connected to the electro-hydraulic rod 21, it can drive the welding torch 22 on the electro-hydraulic rod to move left and right together. Activating the electro-hydraulic rod 21 allows for precise control of the vertical position of the welding torch 22, moving it to the welding joint of the heat exchanger shell. During this process, as the bracket 18 moves, it slides within the limiting block 19 via the slide groove 20, ensuring that the bracket always moves in a straight line and guaranteeing the consistency of the welding torch's movement direction. Through the close cooperation between the motor 16, the threaded rod, the bracket, the electro-hydraulic rod, the welding torch, the slide groove, and the limiting block, precise welding of the heat exchanger shell is achieved, effectively improving the welding quality.

[0029] Working principle: When the operator needs to weld the heat exchanger shells, firstly, the two heat exchanger shells to be welded are placed inside the outer cylinder 5. Then, the electric push rods 13 on both sides of the outer cylinder 5 are activated. Under the action of the electric push rods 13, the pressure plate 14 is moved, fixing the heat exchanger shells. Next, the electric push rods 2 on both sides of the bottom of the workbench 1 are activated. Under the action of the electric push rods 2, the base 4 on the limit slider 3 is moved towards the center. As the base 4 moves, it moves the outer cylinder 5 towards the center and moves the heat exchanger shells towards the support plate 24. When the weld joints of the two heat exchanger shells are aligned, the electric lifting rod 23 is activated, moving the support plate 24 upwards to support the weld joints of the two heat exchanger shells. At this time, the motor 9 on the outer wall of the mounting plate 8 is activated. Under the action of the motor 9, the small gear 11 on the outer wall of the rotating shaft 10 rotates. When gear 11 rotates, it drives gear ring 7 to rotate, which in turn drives outer cylinder 5 and heat exchanger shell to rotate. When outer cylinder 5 rotates, it is limited in the limiting groove 12 by limiting ring 6. Through their cooperation, the heat exchanger shell is quickly positioned, avoiding slippage and displacement during welding and improving work efficiency. At this time, motor 16 on the outer wall of fixed plate 15 is started. Under the action of motor 16, threaded rod 17 is driven to rotate. When threaded rod 17 rotates, it drives bracket 18 to move left and right, which in turn drives welding torch 22 on electric hydraulic rod 21 to move left and right. With the start of electric hydraulic rod 21, welding torch 22 is moved to the welding joint for welding. When bracket 18 moves, it is limited in the limiting block 19 by sliding groove 20 to ensure consistent movement direction. Through their cooperation, precise welding of heat exchanger shell is achieved, improving welding quality.

[0030] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A welding positioning tool for a heat exchanger cylinder, characterized in that: The utility model provides a welding machine, including workbench (1), workbench (1) bottom both ends are fixedly connected with electric push rod no.

2. The welding positioning tool for a heat exchanger cylinder according to claim 1, characterized in that: Each outer barrel (5) both sides wall is fixedly connected with a plurality of electric push rod no.

3. The welding positioning tool for a heat exchanger cylinder according to claim 2, characterized in that: One side fixed plate (15) outside wall is fixedly connected with motor no.

4. The welding positioning tool for a heat exchanger shell according to claim 3, characterized in that: Each outer barrel (5) outside wall is fixedly connected with a pair of limit ring (6), each bottom seat (4) inside is set up with a pair of limit groove (12), and limit ring (6) with limit groove (12) correspond, while limit ring (6) slidingly connects in limit groove (12) inside.

5. The welding positioning tool for a heat exchanger shell according to claim 4, characterized in that: The inner side wall of the support (18) is fixedly connected with a sliding groove (20), and the workbench (1) is provided with a limiting block (19) on one side.

6. The welding positioning tool for a heat exchanger shell according to claim 5, characterized in that: The top of the workbench (1) is fixedly connected with an electric lifting rod (23), and the output end of the electric lifting rod (23) is fixedly connected with a supporting plate (24).

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