Variable diameter copper tube high frequency welding workstation

Abstract

This utility model discloses a high-frequency welding workstation for variable-diameter copper tubes, including a support frame. A disc is rotatably connected to the upper end of the support frame, and a gas guide block is fixedly connected to the edge of the disc. The inner and outer walls of the disc and the gas guide block are both circular and communicate with the gas guide cavity. Two sets of sliding grooves are formed through the outer wall of the positioning column, and two sets of abutment blocks are rotatably connected in each of the two sets of sliding grooves. An adjustment mechanism for driving the abutment blocks to rotate synchronously is installed in the sliding grooves, and each abutment block is provided with a pulley at its end. This utility model uses the pulleys at the ends of the abutment blocks to roll and position the copper tube, ensuring that the axes of the two sets of copper tubes are strictly aligned with the positioning column. This effectively solves the problem of low convenience in controlling the coaxiality of copper tubes using traditional mechanical clamps. At the same time, the rolling contact design of the pulleys avoids damage to the surface of the copper tube caused by rigid clamping. After welding, the copper tube can be easily detached without additional force, improving the convenience of operation and welding quality.

Description

Technical Field

[0001] This utility model relates to the field of welding station technology, and in particular to a high-frequency welding workstation for variable diameter copper pipes. Background Technology

[0002] As a key component in refrigeration and heat exchange equipment, the connection quality of reducing copper tubes directly affects the performance and reliability of the equipment.

[0003] In existing technologies, a high-temperature flame is generated by the combustion of a mixture of oxygen and acetylene to directly heat the copper pipe joint and melt it together. During welding, nitrogen is usually used for protection to prevent oxidation of the inner wall of the copper pipe. However, existing workstations mostly use mechanical clamps to manually adjust the clamping force when clamping and positioning the two sets of copper pipes. This method has certain drawbacks in actual use. For example, after the two sets of copper pipes are positioned, it is necessary to ensure that their axis points are coaxial. However, existing mechanical clamps are difficult to accurately control the axis positions of the two sets of copper pipes, resulting in their axes being misaligned. This leads to misalignment of the joint and uneven weld during subsequent welding. Therefore, a high-frequency welding workstation for variable diameter copper pipes is proposed to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a high-frequency welding workstation for variable-diameter copper tubes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-frequency welding workstation for variable-diameter copper tubes includes a support frame. A disc is rotatably connected to the upper end of the support frame, and a gas guide block is fixedly connected to the edge of the disc. The inner and outer walls of the disc and the gas guide block are both circular. A rotary joint is located at the center of the disc, and a gas guide cavity is formed inside the rotary joint. Multiple sets of nitrogen pipes are installed on the outer wall of the rotary joint, and the other ends of the multiple sets of nitrogen pipes are connected to the gas guide cavity. Multiple sets of fixing blocks are fixedly connected to the end face of the gas guide block, and each set of fixing blocks has a through hole on its end face, which is connected to the gas guide cavity. Two sets of sliding grooves are formed through the outer wall of the positioning column, and two sets of abutment blocks are rotatably connected in each of the two sets of sliding grooves. An adjustment mechanism for driving the abutment blocks to rotate synchronously is installed in the sliding groove, and pulleys are provided at the ends of the abutment blocks.

[0006] Preferably, the adjusting mechanism includes a slider slidably connected in a groove, with connecting rods rotatably connected to the outer walls of both ends of the slider, and the other end of the connecting rods rotatably connected to an adjacent abutment block.

[0007] Preferably, each of the two sets of grooves is rotatably connected to a threaded rod, and the slider is threadedly connected to the threaded section of the threaded rod.

[0008] Preferably, the edges of the abutment blocks are all smoothly transitioned, the inner walls of both sets of slide grooves are planar, and the outer walls on both sides of the slider are in close contact with the inner walls of the slide grooves.

[0009] Preferably, the outer wall of the positioning post is provided with a rotating groove, and rotating blocks are rotatably connected to the end of the positioning post and the rotating groove. The two sets of rotating blocks are respectively coaxially fixedly connected to two sets of threaded rods.

[0010] Preferably, the other end of the rotary joint is connected to an external nitrogen cylinder, and the outer walls of both sets of rotary blocks are provided with grooves in annular shape.

[0011] This utility model has the following beneficial effects: 1. This utility model uses a pulley at the end of the abutment block to roll and position the copper tube, ensuring that the axes of the two sets of copper tubes are strictly aligned with the positioning column. This effectively solves the problem of low convenience in controlling the coaxiality of copper tubes using traditional mechanical clamps. At the same time, the rolling contact design of the pulley avoids damage to the surface of the copper tube caused by rigid clamping. After welding, the copper tube can be easily detached without additional force, improving the convenience of operation and welding quality.

[0012] 2. This utility model uses the combination of a rotary joint and a gas guide block to evenly distribute nitrogen gas to the inner wall of the copper tube, forming an annular gas barrier that completely isolates the high-temperature welding area from contact with air, thus avoiding the problem of easy oxidation of the inner wall of the copper tube during the welding process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the variable diameter copper tube high-frequency welding workstation proposed in this utility model; Figure 2 for Figure 1 Schematic diagram of components such as the central air guide block, fixing block, and positioning column.

[0014] Figure 3 for Figure 2 Schematic diagram of components such as the central fixing block and positioning column.

[0015] Figure 4 for Figure 3 Schematic diagram of components such as threaded rod and abutment block.

[0016] In the diagram: 1. Bracket; 2. Disc; 3. Rotary joint; 4. Nitrogen pipe; 5. Gas guide block; 6. Fixing block; 7. Through hole; 8. Positioning post; 9. Rotating block; 10. Rotating groove; 11. Abutment block; 12. Threaded rod; 13. Sliding block; 14. Connecting rod; 15. Slide groove; 16. Pulley. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-4 A high-frequency welding workstation for variable-diameter copper tubes includes a support 1. A disc 2 is rotatably connected to the upper end of the support 1. A gas guide block 5 is fixedly connected to the edge of the disc 2. The inner and outer walls of the disc 2 and the gas guide block 5 are both circular. A rotary joint 3 is set at the center of the disc 2. A gas guide cavity is opened inside the rotary joint 3. Multiple sets of nitrogen pipes 4 are installed on the outer wall of the rotary joint 3. The other end of each set of nitrogen pipes 4 is connected to the gas guide cavity. Multiple sets of fixing blocks 6 are fixedly connected to the end face of the gas guide block 5. Through holes 7 are opened through the end face of each set of fixing blocks 6 and are connected to the gas guide cavity. Two sets of sliding grooves 15 are opened through the outer wall of the positioning column 8. Two sets of abutment blocks 11 are rotatably connected in each of the two sets of sliding grooves 15. An adjustment mechanism for driving the abutment blocks 11 to rotate synchronously is installed in the sliding grooves 15. A pulley 16 is set at the end of each abutment block 11. Furthermore, through the cooperation of the rotary joint 3 and the gas guide chamber, nitrogen can be evenly distributed to each through hole 7, achieving comprehensive protection of the inner wall of the copper tube during welding and preventing oxidation. The synchronous adjustment of multiple sets of abutment blocks 11 ensures that the two sets of copper tubes are always on the same axis as the positioning column 8 when positioning the copper tube. It should be noted that the height of the rotating groove 10 should be higher than the height of the bottom copper tube to avoid the steel tube blocking the rotating block 9 during adjustment, which would affect the adjustment of the lower abutment block 11. The pulley 16 on the outer wall of the abutment block 11 only positions the steel tube and does not clamp it, thus preventing the steel tube from being unable to effectively detach from the outer wall of the positioning column 8 after welding.

[0019] The adjustment mechanism includes a slider 13 that is slidably connected in the slide groove 15. Both ends of the slider 13 are rotatably connected to connecting rods 14, and the other end of the connecting rods 14 is rotatably connected to the adjacent abutting block 11. Furthermore, through the synchronous transmission of the connecting rod 14, the abutment block 11 can move symmetrically, achieving a uniform distribution of the clamping force on the copper tube and avoiding excessive local stress that could lead to deformation.

[0020] Both sets of sliding grooves 15 are rotatably connected to threaded rods 12, and sliders 13 are threadedly connected to the threaded sections of threaded rods 12 respectively. Furthermore, the threaded rod 12 has a self-locking thread characteristic, which prevents loosening when clamping the copper tube.

[0021] The edges of the abutment block 11 are all smoothly transitioned, the inner walls of the two sets of slide grooves 15 are all flat, and the outer walls on both sides of the slider 13 are in close contact with the inner walls of the slide grooves 15. Furthermore, the smooth transition design of the abutment block 11 can avoid scratching the surface of the copper tube, and the close contact between the flat groove 15 and the slider 13 ensures that the slider 13 moves vertically up and down during the rotation of the threaded rod 12.

[0022] The outer wall of the positioning column 8 is provided with a rotating groove 10. The end of the positioning column 8 and the rotating groove 10 are rotatably connected to rotating blocks 9. The two sets of rotating blocks 9 are coaxially fixedly connected to the two sets of threaded rods 12 respectively. The other end of the rotary joint 3 is connected to the external nitrogen cylinder. The outer wall of the two sets of rotating blocks 9 is provided with annular grooves. Furthermore, the groove design of the rotating block 9 increases the friction contact surface, making it easier to apply force and rotate.

[0023] In this invention, the device is used as follows: The operator first inserts the two sets of copper tubes to be welded vertically into the top of the positioning post 8, bringing the ends of the copper tubes close to the air guide block 5. Then, the operator manually rotates the rotating block 9, driving the threaded rod 12 to rotate, which in turn causes the slider 13 to slide vertically along the groove 15. The slider 13, through the connecting rod 14, pushes the two sets of abutment blocks 11 to rotate outwards synchronously. At this time, the pulley 16 at the end of the abutment block 11 contacts the outer wall of the copper tube. The pulley 16 only performs rolling positioning of the copper tube, rather than rigid clamping, ensuring that the copper tube axis is aligned with the positioning post 8 while avoiding the problem of the copper tube being difficult to detach after welding due to excessive clamping force.

[0024] After the copper tube is positioned, the operator activates the external nitrogen supply system. Nitrogen enters the gas guide chamber through the rotary joint 3 and is evenly distributed to each through hole 7 of the gas guide block 5. Nitrogen is injected into the inner wall of the copper tube from the through holes 7 at a constant flow rate, forming an annular gas barrier that completely isolates the high-temperature welding area from air and prevents oxidation of the inner wall.

[0025] After welding, the rolling contact design of the pulley 16 greatly reduces friction, allowing operators to easily pull out the welded copper tube without applying additional detachment force.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high frequency welding station for variable diameter copper tubes, comprising a support (1), characterized in that, The upper end of the bracket (1) is rotatably connected to a disc (2), and a gas guide block (5) is fixedly connected to the edge of the disc (2). The inner and outer walls of the disc (2) and the gas guide block (5) are both circular. A rotary joint (3) is provided at the center of the disc (2). A gas guide cavity is opened in the rotary joint (3). Multiple sets of nitrogen pipes (4) are installed on the outer wall of the rotary joint (3). The other end of the multiple sets of nitrogen pipes (4) is connected to the gas guide cavity. Multiple sets of fixing blocks (6) are fixedly connected to the end face of the gas guide block (5). Through holes (7) are opened through the end face of the multiple sets of fixing blocks (6) and are connected to the gas guide cavity. Two sets of sliding grooves (15) are opened through the outer wall of the positioning column (8). Two sets of abutment blocks (11) are rotatably connected in the two sets of sliding grooves (15). An adjustment mechanism for driving the abutment blocks (11) to rotate synchronously is installed in the sliding grooves (15). A pulley (16) is provided at the end of the abutment blocks (11).

2. The variable diameter copper tube high frequency welding station of claim 1, wherein, The adjustment mechanism includes a slider (13) that is slidably connected in a groove (15). Both ends of the slider (13) are rotatably connected to connecting rods (14), and the other end of the connecting rods (14) is rotatably connected to an adjacent abutting block (11).

3. The variable diameter copper tube high frequency welding station of claim 2, wherein, Both sets of the slide grooves (15) are rotatably connected to threaded rods (12), and the sliders (13) are respectively threadedly connected to the threaded sections of the threaded rods (12).

4. The variable diameter copper tube high frequency welding station of claim 3, wherein, The edges of the abutment block (11) are all smoothly transitioned, the inner walls of the two sets of slide grooves (15) are all planar, and the outer walls on both sides of the slider (13) are in contact with the inner walls of the slide grooves (15).

5. The variable diameter copper tube high frequency welding station of claim 4, wherein, The outer wall of the positioning post (8) is provided with a rotating groove (10), and rotating blocks (9) are rotatably connected to the end of the positioning post (8) and the rotating groove (10). The two sets of rotating blocks (9) are coaxially fixedly connected to the two sets of threaded rods (12).

6. The variable diameter copper tube high frequency welding station of claim 5, wherein, The other end of the rotary joint (3) is connected to an external nitrogen cylinder, and the outer walls of both sets of rotating blocks (9) are provided with grooves in annular shape.

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