Refrigeration pipe assembly welding device

Abstract

The invention relates to the technical field of welding machining, and discloses a refrigeration pipe assembly welding device. A clamping assembly and a welding gun are arranged on a fixed frame, a first push rod is arranged on a movable frame, a copper ring is arranged in the clamping assembly, and after a copper pipe is connected with a gas-liquid separator through the clamping assembly, the clamping assembly clamps and fixes the copper pipe; when the gas-liquid separator and the copper pipe are welded, the movable frame moves towards one side of the fixed frame, the first push rod enables the clamping assembly to be separated, the copper ring moves to the welding position of the gas-liquid separator and the copper pipe, and a welding gun conveniently works to weld the gas-liquid separator and the copper pipe. The welding gun can do circular motion along an annular track, 360-degree dead-corner-free heating is achieved at the welding position of the gas-liquid separator and the copper pipe, the problem that heating is uneven in traditional manual welding or fixed point welding is solved, and insufficient welding and slag inclusion caused by insufficient local heating or metal structure damage caused by local overheating are avoided.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, specifically to a welding device for refrigeration pipe assemblies. Background Technology

[0002] In the manufacturing of refrigeration equipment (such as air conditioners, refrigerators, refrigeration units, etc.), the welding quality of refrigeration pipe assemblies directly determines the refrigeration efficiency, operational stability and service life of the equipment. As a key component in the refrigeration system for separating refrigerant gas-liquid mixtures, the gas-liquid separator needs to achieve a high-strength and high-airtightness connection with the copper pipes.

[0003] Currently, welding of refrigeration pipe components mostly uses manual welding torches or fixed-point welding methods. Due to the limited movement trajectory of the welding equipment, operators need to move the welding torch around the annular connection between the gas-liquid separator and the copper pipe. Affected by differences in hand stability and operator skill, problems such as local overheating or local underheating are prone to occur, resulting in uneven metal structure at the weld, which in turn produces defects such as porosity, slag inclusion, and incomplete welds. In severe cases, it can cause refrigerant leakage, directly reducing the operating efficiency of refrigeration equipment and even causing safety hazards. Summary of the Invention

[0004] The purpose of this invention is to provide a welding apparatus for refrigeration pipe assemblies to solve the problems mentioned in the background art.

[0005] Technical solution

[0006] This invention provides the following technical solution: a refrigeration pipe assembly welding device, comprising a worktable, a gas-liquid separator, and a copper pipe. The worktable is provided with a placement frame, a fixed frame, and a movable frame. The gas-liquid separator is placed on the placement frame. The fixed frame is provided with a clamping assembly and a welding gun. The movable frame is provided with a first pushing rod. The clamping assembly contains a copper ring. When the copper pipe is connected to the gas-liquid separator through the clamping assembly, the clamping assembly clamps and fixes the copper pipe. The movable frame moves to one side of the fixed frame, and the first pushing rod causes the clamping assembly to separate. The copper ring moves to the welding position between the gas-liquid separator and the copper pipe, facilitating the welding gun to weld the gas-liquid separator and the copper pipe.

[0007] Preferably, the fixed frame is provided with a motor and a fixed column, the motor is provided with a rotating gear, both the fixed frame and the movable frame are provided with sliding grooves, the sliding grooves are provided with sliding blocks, the welding gun is provided on the sliding blocks, each sliding block is provided with a rotating gear ring plate, and the rotating gear is meshed with the rotating gear ring plate.

[0008] Preferably, the clamping assembly includes a clamping rod, a clamping block and a second push rod are provided on the clamping rod, a stepped groove is provided in the clamping block, a copper tube passes through the clamping block, and a copper ring is located in the stepped groove.

[0009] Preferably, the contact edges of the first push rod and the clamping rod are both provided with a first inclined surface, and the horizontal height of the first inclined surface is higher than that of the clamping block.

[0010] Preferably, the fixing frame has a first connecting cavity and a second connecting cavity. A partition is provided in the first connecting cavity, a pulling plate is provided below the partition, a piston cavity is provided between the pulling plate and the partition, and a connecting channel is provided between the piston cavity and the second connecting cavity.

[0011] Preferably, a third elastic element is provided in the second connecting cavity, and a limiting post is provided on the third elastic element, the limiting post being located in the sliding groove.

[0012] Preferably, a pushing column is provided on the partition plate, and the second pushing rod slides in contact with the pushing column after entering the first connecting cavity. A first elastic element is provided on the side of the pushing column.

[0013] Preferably, a pull rod is provided on the side of the partition, a second elastic element is provided on the pull rod, the push column and the pull rod are in sliding contact, and a second inclined surface is provided on both the push column and the pull rod.

[0014] Preferably, the workbench is further provided with a push cylinder and a support frame. The push cylinder is fixedly connected to the movable frame, and the support frame is located on the side of the fixed frame and in contact with the copper pipe.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention provides a welding device for refrigeration pipe assemblies, which has the following advantages:

[0017] 1. In this invention, the complete annular sliding groove formed by the docking of the fixed frame and the movable frame allows the welding gun to move in a circular motion along the annular trajectory, achieving 360° heating without dead angles at the welding joint between the gas-liquid separator and the copper pipe. This solves the problem of uneven heating in traditional manual welding or fixed-point welding, avoids incomplete welding and slag inclusion caused by insufficient local heating, or metal structure damage caused by local overheating. At the same time, it ensures that the copper ring evenly covers the welding joint after melting, greatly improving the welding sealing and structural strength, and effectively reducing the risk of refrigerant leakage in the subsequent operation of the refrigeration system.

[0018] 2. In this invention, a circular channel matching the outer diameter of the copper tube is formed by the docking of two clamping blocks, and the stepped groove can stably accommodate the copper ring. At the same time, the docking end of the copper tube and the gas-liquid separator is clamped and fixed to avoid docking misalignment and ensure accurate coaxiality of the two. Even during the placement of the copper ring and the installation of the copper tube, the clamping blocks can provide stable support to prevent the interface from being misaligned due to external force or its own weight.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the fixed frame and the movable frame of the present invention before they are connected;

[0023] Figure 2 This is a schematic diagram showing the connection between the fixed frame and the movable frame of the present invention;

[0024] Figure 3 This is a schematic diagram showing the separation of the clamping component from the copper ring in this invention;

[0025] Figure 4 This is a rear view of the connection between the fixed frame and the movable frame of the present invention;

[0026] Figure 5 This is a diagram showing the connection between the clamping assembly and the push rod of the present invention;

[0027] Figure 6 This is a schematic diagram of the movement of the welding gun of the present invention via the sliding block and the sliding groove;

[0028] Figure 7 This is a motion diagram of the clamping rod of the present invention;

[0029] Figure 8 This is a diagram showing the connection between the push rod and the push column of the present invention;

[0030] Figure 9 This is a diagram showing the limiting post's effect on the sliding block in this invention.

[0031] Figure 10 This is a schematic diagram of the connecting cavity of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] In the diagram: 1. Workbench; 2. Placement rack; 3. Fixed rack; 4. Moving rack; 5. Push cylinder; 6. Gas-liquid separator; 7. Copper pipe; 8. Clamping assembly; 9. Motor; 10. Rotating gear; 11. Copper ring; 12. First push rod; 13. Fixed column; 14. Support frame; 15. Sliding groove; 16. Sliding block; 17. Welding gun; 18. Rotating gear ring plate; 19. Clamping rod; 20. Clamping block; 21. First inclined plane; 22. Pulling rod; 23. Second push rod; 24. Limiting column; 25. Pulling plate; 26. Pushing column; 27. First elastic element; 28. Second elastic element; 29. ​​Piston chamber; 30. Partition plate; 31. Third elastic element; 32. Second inclined plane; 33. Connecting cavity. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example:

[0036] Please see Figures 1-10 This invention provides a technical solution: a refrigeration pipe assembly welding device, including a workbench 1, a gas-liquid separator 6, and a copper pipe 7. A placement frame 2 and a fixed frame 3 are fixedly installed on the workbench 1, and a movable frame 4 is slidably installed near the fixed frame 3. The gas-liquid separator 6 is placed on the placement frame 2. A clamping assembly 8 is provided on the inner ring side of the fixed frame 3. A welding gun 17 is slidably installed on the bottom end of the fixed frame 3. A first push rod 12 is fixedly installed on the inner ring side of the movable frame 4. A copper ring 11 is provided in the clamping assembly 8. When the copper pipe 7 is connected to the gas-liquid separator 6 through the clamping assembly 8, the clamping assembly 8 clamps and fixes the copper pipe 7. The movable frame 4 moves to one side of the fixed frame 3, and the first push rod 12 causes the clamping assembly 8 to separate. The copper ring 11 moves to the welding position of the gas-liquid separator 6 and the copper pipe 7, which facilitates the welding gun 17 to work and weld the gas-liquid separator 6 and the copper pipe 7.

[0037] In this embodiment, a motor 9 and a fixed column 13 are fixedly installed on the fixed frame 3. The motor 9 is installed on the inner ring side of the fixed frame 3, but the motor 9 does not contact the clamping assembly 8. Even if the clamping assembly 8 is separated, it will not contact the motor 9. A rotating gear 10 is fixedly installed on the output shaft end of the motor 9. Both the fixed frame 3 and the movable frame 4 are provided with sliding grooves 15. The two sliding grooves 15 are located at the same height. When the fixed frame 3 and the movable frame 4 are connected to each other, the two sliding grooves 15 can be combined to form a complete annular sliding groove 15. A sliding block 16 is slidably installed in the sliding groove 15. The welding gun 17 is fixedly installed on the sliding block 16. Each sliding block 16 has a sliding block 16. A rotating gear ring plate 18 is fixedly installed on the inner ring side of block 16. The rotating gear 10 is meshed with the rotating gear ring plate 18. The rotating gear ring plate 18 is divided into four sections. Two sections of the rotating gear ring plate 18 are slidably connected below the fixed frame 3 and the movable frame 4. When the motor 9 is working, it can drive the rotating gear 10 to rotate. At the same time, the rotating gear 10 can drive the rotating gear ring plate 18 to rotate. The welding gun 17 located on the rotating gear ring plate 18 can heat the welding joint of the gas-liquid separator 6 and the copper pipe 7 in 360° as the rotating gear ring plate 18 rotates, ensuring welding heating, preventing uneven heating at the welding joint, and avoiding the generation of air holes at the welding joint.

[0038] In this embodiment, the clamping assembly 8 includes a clamping rod 19, one end of which extends into the fixed post 13. A clamping block 20 and a second pushing rod 23 are fixedly installed on the clamping rod 19. The clamping rod 19 is Z-shaped. The clamping block 20 and the second pushing rod 23 are located at both ends of the clamping rod 19. At the same time, the clamping block 20 and the second pushing rod 23 on the same clamping rod 19 are located on both sides of the clamping rod 19. A stepped groove is opened in the clamping block 20. The copper tube 7 passes through the clamping block 20. The copper ring 11 is located in the stepped groove. Two equal clamping blocks 20 form a circle. The inner diameter of the clamping block 20 is equal to the outer diameter of the copper tube 7. The inner circle of the copper ring 11 is larger than the outer diameter of the copper tube 7. That is, the copper tube 7 passes through the two clamping blocks 20 and also passes through the copper ring 11. At the same time, the copper ring 11 is in the clamping block 20.

[0039] The fixed column 13 has a movable cavity, and the end of the clamping rod 19 is located in the movable cavity. At the same time, a return spring is installed in the movable cavity. When the two clamping rods 19 in the fixed column 13 move away from each other, the return spring is stretched. At the same time, the movable cavity is connected to the first connecting cavity, that is, the second push rod 23 can enter the first connecting cavity when the clamping rod 19 moves and contact one end of the push column 26. When the push column 26 enters the first connecting cavity, it will drive the push column 26 to move.

[0040] When the fixed frame 3 and the movable frame 4 are not in contact, the two equal clamping blocks 20 are in contact with each other and combine to form a circle. Before the copper tube 7 enters the clamping block 20, the copper ring 11 is placed between the two clamping blocks 20, that is, in the stepped groove. At the same time, when the copper tube 7 is connected to the gas-liquid separator 6 through the clamping block 20, the combined clamping block 20 can provide a stable clamping effect for the copper tube 7. That is, after the copper tube 7 is connected to the gas-liquid separator 6, the clamping block 20 can ensure the stability of the connection between the copper tube 7 and the gas-liquid separator 6, prevent the connection between the two from shifting, and facilitate subsequent welding work.

[0041] In this embodiment, the contact edges of the first push rod 12 and the clamping rod 19 are both provided with a first inclined surface 21. When the moving frame 4 moves to the side of the fixed frame 3, the first push rod 12 will drive the clamping rod 19 to move through the first inclined surface 21. At the same time, when the clamping rod 19 moves, it can drive the clamping block 20 to move. The horizontal height of the first inclined surface 21 is higher than that of the clamping block 20. When the first push rod 12 contacts the clamping rod 19, the contact between the two is avoided from being affected by the clamping block 20.

[0042] The fixed frame 3 and the movable frame 4 are of the same shape and size.

[0043] In this embodiment, both the fixed frame 3 and the movable frame 4 are provided with a first connecting cavity and a second connecting cavity. A partition 30 is fixedly installed in the first connecting cavity, and a pulling plate 25 is slidably installed below the partition 30. One end of the pulling plate 25 is located below the partition 30, and the other end passes through the inner wall of the fixed frame 3 or the movable frame 4 and extends outward. The area between the pulling plate 25 and the partition 30 is set as a piston cavity 29. A connecting channel 33 is provided between the piston cavity 29 and the second connecting cavity. When the pulling plate 25 moves below the partition 30, it moves in the piston cavity 29, and the gas or lubricating oil in the piston cavity 29 can be sent into the second connecting cavity through the connecting channel 33. This can control the movement range of the limiting post 24. When the limiting post 24 extends into the sliding groove 15, the sliding block 16 can be restricted by the limiting post 24, which facilitates the adjustment of the position of the sliding block 16 in the sliding groove 15 and facilitates the adjustment between the multi-segment rotating toothed ring plates 18.

[0044] In this embodiment, a third elastic element 31 is fixedly installed in the second connecting cavity, and a limiting post 24 is fixedly installed on the third elastic element 31. The limiting post 24 is located in the sliding groove 15. When the piston cavity 29 is in the normal state, the third elastic element 31 in the second connecting cavity is in the normal state, and the limiting post 24 is also retracted in the second connecting cavity. The limiting post 24 will not extend into the sliding groove 15, nor will it hinder the normal operation of the sliding block 16 in the sliding groove 15. That is, it will not prevent the welding cavity 17 from welding the gas-liquid separator 6 and the copper pipe 7. That is, when the piston cavity 29 is squeezed, the gas or lubricating oil in the piston cavity 29 will enter the second connecting cavity through the connecting cavity 33. The limiting post 24 in the second connecting cavity will extend into the sliding groove 15 and stretch the third elastic element 31.

[0045] The first elastic element 27, the second elastic element 28, and the third elastic element 31 are all tension springs.

[0046] In this embodiment, a push column 26 is movably installed above the partition 30. After the second push rod 23 enters the first connecting cavity, it slides into contact with the push column 26. A first elastic element 27 is fixedly installed on the side of the push column 26. The other end of the first elastic element 27 is fixedly connected to the inner wall of the first connecting cavity. When the second push rod 23 enters the first connecting cavity, it will drive the push column 26 to move and stretch the first elastic element 26. At the same time, as the push column 26 moves, it can drive the pull rod 22 to move upward.

[0047] In this embodiment, a pull rod 22 is slidably installed on the side of the partition 30. The top end of the pull rod 22 passes through the inner wall of the top end of the fixed frame 3 or the movable frame 4 and extends to the outside. A second elastic element 28 is sleeved on the pull rod 22. The second elastic element 28 is always located in the first connecting cavity. The push column 26 and the pull rod 22 are in sliding contact. Both the push column 26 and the pull rod 22 are provided with a second inclined surface 32. When the push column 26 moves to the side of the pull rod 22, it will drive the pull rod 22 to move upward through the second inclined surface 32 and stretch the second elastic element 28.

[0048] The bottom end of the pull rod 22 is engaged with the pull plate 25. That is, the pull plate 25 has equally spaced engagement grooves that match the pull rod 22. Only when the pull rod 22 moves upward and separates from the pull plate 25 can the pull plate 25 move in the piston chamber 29. Moreover, the second elastic element 28 is located above the pull plate 25 and does not contact the pull plate 25.

[0049] In this embodiment, a push cylinder 5 and a support frame 14 are also fixedly installed on the workbench 1. The push cylinder 5 is fixedly connected to the movable frame 4, and the support frame 14 is located on the side of the fixed frame 3 and is in contact with the copper pipe 7.

[0050] A stabilizing frame is installed on the workbench 1. The stabilizing frame is powered by a cylinder or motor. A signal device is installed in the placement frame 2. A receiver is installed in the stabilizing frame. When the gas-liquid separator 6 is placed on the placement frame 2, the signal device will emit a signal that is received by the receiver. The stabilizing frame clamps and fixes the gas-liquid separator 6. The connection between the signal device and the receiver, as well as the connection between the receiver and the cylinder or motor, all adopt existing mature technologies.

[0051] Motor 9 is a forward and reverse motor, meaning that after welding is completed, motor 9 will drive welding gun 17 to reverse back to its original position.

[0052] The working principle of this embodiment is as follows: During use, the fixed frame 3 and the movable frame 4 are in a separated state. The two clamping blocks 20 in the fixed frame 3 are in contact with each other. The gas-liquid separator 6 is placed on the placement frame 2. A copper ring 11 is placed in the two clamping blocks 20. Since the clamping blocks 20 have stepped grooves, the copper ring 11 will be stably retained in the clamping blocks 20. The welded end of the copper tube 7 is passed through the clamping block 20. At the same time, the copper tube 7 will also be connected to the welded end of the gas-liquid separator 6 through the copper ring 11. At this time, the clamping block 20 will provide a stable support for the copper tube 7, which makes it easy for the copper tube 7 and the gas-liquid separator 6 to be combined.

[0053] After the copper pipe 7 is connected to the gas-liquid separator 6, the operation of the cylinder 5 drives the movable frame 4 to approach the fixed frame 3. The first push rod 12 on the movable frame 4 will drive the clamping rod 19 to move via the first inclined surface 21. When the clamping rod 19 moves, it will drive the clamping block 20 and the second push rod 23 to move together. The two adjacent clamping blocks 20 will separate from each other, causing the copper ring 11 in the two clamping blocks 20 to move down to the welding point between the gas-liquid separator 6 and the copper pipe 7, until the fixed frame 3 and the movable frame 4 are connected as one unit. The operation of the motor 9 drives the rotating gear. When the gear 10 rotates, it drives the rotating gear ring plate 18 to rotate. When the rotating gear ring plate 18 rotates, it drives the welding gun 17 to rotate through the sliding block 16. When the welding gun 17 rotates, it heats the connection between the gas-liquid separator 6 and the copper pipe 7 360°. The copper ring 11 melts under the heating of the welding chamber 17 and covers the connection between the gas-liquid separator 6 and the copper pipe 7. The welding chamber 17 reduces the welding blind spots between the two by heating 360°, and also makes it easier for the copper ring 11 to weld the gas-liquid separator 6 and the copper pipe 7, thus increasing the welding efficiency.

[0054] As the clamping rod 19 moves, it will drive the second push rod 23 into the first connecting cavity. The second push rod 23 will contact the push column 26 and drive the push column 26 to move towards the pull rod 22 until the pull rod 22 separates from the pull plate 25. At this time, it is not necessary to push the pull plate 25 into the piston cavity 29. In this way, the limiting column 24 will not extend into the sliding groove 15 and will not hinder the sliding block 16 from driving the welding gun 17 to weld.

[0055] After welding is completed, the welded gas-liquid separator 6 and copper pipe 7 are removed from the placement rack 2. At this time, the connection point of the four rotating toothed ring plate 18 is not necessarily on the same straight plane as the connection point of the fixed frame 3 and the movable frame 4. Then, the pulling plate 25 is moved into the piston chamber 29. The pulling plate 25 will cause the gas in the piston chamber 29 to pass through the connecting channel 33 to the second connecting chamber. After entering the second connecting chamber, it will drive the limiting post 24 to extend into the sliding groove 15. At the same time, the third elastic element 31 will also be stretched, pushing the sliding block 16 in the sliding groove 15. During the movement, the sliding block 16 will be restricted by the limiting post 24. The limiting post 24 is also divided into four groups with equal spacing, and each group has two limiting posts 24. That is, the fixed frame 3 and the movable frame 4 form a After the complete circle is formed, the four sets of limiting posts 24 are evenly distributed. Therefore, when the sliding block 16 encounters the first limiting post 24 of the first set during its movement, the sliding block 16 can move the first limiting post 24 downward. Because the gas or lubricating oil in the second connecting cavity can briefly retract, the sliding block 16 passes through and is located between the two limiting posts 24. In this way, the sliding block 16 will be limited by the two limiting posts 24 of the same set. At this time, the connection of the four-segment rotating toothed ring plate 18 is on the same straight line as the connection of the fixed frame 3 and the moving frame 4. By pushing the cylinder 5, the moving frame 4 can be separated from the fixed frame 3. The four-segment rotating toothed ring plate 18 will not hinder the separation of the fixed frame 3 and the moving frame 4. At the same time, the clamping component 8 will also return to its original position and take out the refrigeration pipe component removed from the placement frame 2.

[0056] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A welding apparatus for refrigeration pipe assemblies, comprising a workbench (1), a gas-liquid separator (6), and copper pipes (7), characterized in that: The workbench (1) is provided with a placement rack (2), a fixed rack (3) and a movable rack (4). The gas-liquid separator (6) is placed on the placement rack (2). The fixed rack (3) is provided with a clamping assembly (8) and a welding gun (17). The movable rack (4) is provided with a first push rod (12). The clamping assembly (8) is provided with a copper ring (11). When the copper tube (7) is connected to the gas-liquid separator (6) through the clamping assembly (8), the clamping assembly (8) clamps and fixes the copper tube (7). The movable rack (4) moves to the side of the fixed rack (3). The first push rod (12) will cause the clamping assembly (8) to separate. The copper ring (11) moves to the welding position of the gas-liquid separator (6) and the copper tube (7), so that the welding gun (17) can work to weld the gas-liquid separator (6) and the copper tube (7).

2. The refrigeration pipe assembly welding device according to claim 1, characterized in that: The fixed frame (3) is equipped with a motor (9) and a fixed column (13). The motor (9) is equipped with a rotating gear (10). The fixed frame (3) and the movable frame (4) are both provided with sliding grooves (15). The sliding grooves (15) are provided with sliding blocks (16). The welding gun (17) is provided on the sliding blocks (16). Each sliding block (16) is provided with a rotating gear ring plate (18). The rotating gear (10) is meshed with the rotating gear ring plate (18).

3. The refrigeration pipe assembly welding device according to claim 2, characterized in that: The clamping assembly (8) includes a clamping rod (19), on which a clamping block (20) and a second push rod (23) are provided. A stepped groove is provided in the clamping block (20), and a copper tube (7) passes through the clamping block (20). A copper ring (11) is located in the stepped groove.

4. The refrigeration pipe assembly welding device according to claim 3, characterized in that: The first push rod (12) and the clamping rod (19) are both provided with a first inclined surface (21) on their contact edges, and the horizontal height of the first inclined surface (21) is higher than that of the clamping block (20).

5. The refrigeration pipe assembly welding device according to claim 3, characterized in that: The fixing frame (3) has a first connecting cavity and a second connecting cavity. A partition (30) is provided in the first connecting cavity. A pull plate (25) is provided below the partition (30). A piston cavity (29) is provided between the pull plate (25) and the partition (30). A connecting channel (33) is provided between the piston cavity (29) and the second connecting cavity.

6. The refrigeration pipe assembly welding device according to claim 5, characterized in that: The second connecting cavity is provided with a third elastic element (31), and a limiting post (24) is provided on the third elastic element (31). The limiting post (24) is located in the sliding groove (15).

7. The refrigeration pipe assembly welding device according to claim 5, characterized in that: A push post (26) is provided on the partition (30). After the second push rod (23) enters the first connecting cavity, it slides in contact with the push post (26). A first elastic element (27) is provided on the side of the push post (26).

8. The refrigeration pipe assembly welding device according to claim 5, characterized in that: A pull rod (22) is provided on the side of the partition (30), and a second elastic element (28) is provided on the pull rod (22). The push column (26) and the pull rod (22) are in sliding contact, and a second inclined surface (32) is provided on both the push column (26) and the pull rod (22).

9. The refrigeration pipe assembly welding device according to claim 1, characterized in that: The workbench (1) is also equipped with a push cylinder (5) and a support frame (14). The push cylinder (5) is fixedly connected to the moving frame (4). The support frame (14) is located on the side of the fixed frame (3) and is in contact with the copper pipe (7).

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