Automatic copper welding equipment for air conditioner stop valve

Abstract

The invention belongs to the technical field of welding, and provides automatic copper welding equipment for an air conditioner stop valve, which comprises a base, a rotating disc is arranged on the base, and a first rotating power piece for driving the rotating disc to rotate is fixedly mounted on the base; a plurality of sets of first supports and second supports which are distributed in a circumferential array mode around the axis of the rotating disc are fixedly installed on the rotating disc, and therefore the technical problem that in the prior art, a red copper pipe cannot be accurately positioned, and consequently the red copper pipe deforms is solved. The red copper pipe is placed and positioned through the supporting rod and the positioning plate, so that the positioning accuracy of the red copper pipe and the stop valve is guaranteed, a worker can change the angle of the lifting frame through rotation of the dial, the placing angle of the red copper pipe is changed, and the device can be widely applied to the operation scene of pipeline connection.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to automatic brazing equipment for an air-conditioning stop valve. Background Art

[0002] A stop valve is a connector installed on the outdoor unit of an air conditioner, connecting the indoor unit to the outdoor unit. A stop valve typically consists of a valve seat, a valve core, a cap, and a connecting pipe. The valve seat is typically made of brass, while the connecting pipe is typically made of copper. In actual production, the copper connecting pipe needs to be welded to the brass valve seat.

[0003] During the welding process, there are angle and direction requirements between the connecting pipe and the valve seat, and the existing welding device is unreasonable in design, which often leads to the wrong angle welding between the valve seat and the connecting pipe. In response to the above technical problems, the Chinese patent with patent announcement number CN104816121B fixes the valve seat of the stop valve when in use, then inserts one end of the connecting pipe into the valve seat, and places the other end on the frame plate of the positioning device. The angle of the connecting pipe is adjusted by moving the movable column set on the frame plate. However, when in use, one end of the copper tube is manually inserted into the valve seat, and the copper tube cannot be positioned. Therefore, when the copper tube is inserted into the valve seat, it cannot ensure that the connecting hole of the copper tube and the valve seat is in a coaxial arrangement state. Then, when the copper tube is inserted into the valve seat, it will be squeezed and collided with the inner wall of the connecting hole of the valve seat, causing deformation of the copper tube and affecting the quality of the connection between the copper tube and the valve seat. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic copper welding device for an air-conditioning stop valve, aiming to solve the technical problem in the prior art that the copper tube cannot be accurately positioned, resulting in deformation of the copper tube.

[0005] The present invention is achieved as follows: an automatic brazing device for an air-conditioning stop valve comprises a base, a turntable is provided on the base, a first rotating power member that drives the turntable to rotate is fixedly mounted on the base, a plurality of first brackets and a second bracket that are distributed in a circular array around the axis of the turntable are fixedly mounted on the turntable, two groups of symmetrically distributed placement plates are slidably mounted on the first bracket, the end of the placement plate away from the turntable is an L-shaped structure, a positioning column is fixedly mounted on the horizontal section of the placement plate, a second elastic member is fixedly mounted on the placement plate, the end of the second elastic member away from the placement plate is fixedly connected to the middle part of the first bracket, and a plurality of welding assemblies corresponding to the positions of the first brackets are provided on the base; The second bracket corresponds to the position of the first bracket and a lifting plate is slidably installed on the second bracket, a lifting frame is provided on the lifting plate, a support rod is fixedly installed on the side of the vertical section of the lifting frame, a third telescopic member is fixedly installed on the horizontal section of the lifting frame, a first pressing plate is provided on the output end of the third telescopic member, a positioning plate is slidably installed on the vertical section of the lifting frame, one end of the positioning plate is set as a V-shaped structure, and a screw is rotatably installed on the vertical section of the lifting frame to drive the positioning plate to move.

[0006] Further technical solution: The horizontal section of the placement plate is slidably installed with a card block, which is located between the positioning column and the vertical section at the top of the placement plate. A first elastic member is fixedly installed on the side of the card block, and the end of the first elastic member away from the card block is fixedly connected to the vertical section at the top of the placement plate. The vertical section at the top of the placement plate is slidably installed with a guide rod for guiding the card block, and a slope structure is provided on the side of the card block close to the positioning column, and the slope structure is located at the top of the card block.

[0007] Further technical solution: A second telescopic part is fixedly installed on the side of the first bracket, two sets of first pull wires are fixedly connected to the output end of the second telescopic part, the end of the first pull wire away from the second telescopic part is fixedly connected to the placement plate on the same side, and a guide shaft for changing the moving direction of the first pull wire is fixedly installed on the first bracket.

[0008] Further technical solution: the symmetry plane of the V-shaped structure on the positioning plate coincides with the symmetry plane of the corresponding placement plate, and the axis of the support rod is located on the symmetry plane of the V-shaped structure on the positioning plate.

[0009] Further technical solution: The welding assembly includes a ring gear, which is rotatably mounted on a turntable and the corresponding first bracket is located inside the ring gear. The rotation axis of the ring gear is located within the symmetrical plane of the placement plate. A side plate is fixedly mounted on the ring gear, a first telescopic member is fixedly mounted on the top of the side plate, a welding gun is fixedly mounted on the output end of the first telescopic member, and a second rotating power member is provided on the turntable to drive the ring gear to rotate.

[0010] Further technical solution: the lifting frame is rotatably mounted on the end of the lifting plate through a rotating shaft, a scale plate is fixedly mounted on the top of the rotating shaft and a fixing screw is threadedly mounted on the scale plate.

[0011] Further technical solution: A second pressing plate is provided on the first pressing plate, and the second pressing plate is connected to the first pressing plate through multiple groups of telescopic rods. The telescopic rods are rotatably connected to the first pressing plate and the second pressing plate. A third elastic member is provided on the telescopic rod, and both ends of the third elastic member are fixedly connected to the two ends of the telescopic rod. A third pull wire is fixedly connected to the first pressing plate, and the third pull wire is fixedly connected to the second pressing plate. When the third pull wire is in a vertical state, the telescopic rod is in an inclined state.

[0012] Further technical solution: Through grooves are provided at both ends of the second pressure plate, and two groups of symmetrically distributed splints are rotatably installed in the through grooves. A counterweight block is provided at the end of the splint away from its rotation axis. Multiple groups of second pull wires corresponding to the positions of the splints are fixedly connected to the second pressure plate, and the second pull wires are connected to the corresponding splints. When the second pull wires are in a straight line state, an angle is set between the splint and the vertical plane.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The stop valve is placed and positioned by the placement plate, and the copper tube is placed and positioned by the support rod and the positioning plate, so as to ensure the accuracy of the positioning of the copper tube and the stop valve. The staff can change the angle of the lifting frame by rotating the dial, thereby changing the placement angle of the copper tube, and adjusting the angle after the copper tube and the stop valve are connected. After the adjustment is completed, it is fixed by screws, so that the angle of the copper tube can be adjusted before the copper tube is connected to the stop valve and the accurate positioning of the copper tube and the stop valve can be guaranteed, thereby ensuring the accuracy of the connection between the copper tube and the stop valve and improving the quality of subsequent welding.

[0014] 2. When the staff places the stop valve, the end of the installation part of the stop valve will contact the inclined surface of the block. When the stop valve moves downward, the installation part of the stop valve will push the block to move away from the positioning column through the inclined surface and compress the first elastic member. Finally, the end face of the installation part of the stop valve will contact the vertical end face of the block. At this time, the first elastic member is in a compressed state and will apply thrust to the block, and then apply thrust to the installation part of the stop valve, so that the stop valve is clamped and fixed under the action of the thrust, further improving the stability of the stop valve during placement, ensuring that the lower surface of the stop valve installation part is in close contact with the horizontal section of the placement plate, avoiding the stop valve from tilting during placement, ensuring the accuracy of the hole positioning on the valve body, and improving the quality of subsequent connection and welding between the valve body and the pipeline.

[0015] 3. When the third telescopic member drives the first pressing plate to move downward, the splint first contacts the copper tube. Since a counterweight is provided at the lower end of the splint, the splint can apply thrust to the copper tube from both sides when the second pressing plate moves downward, thereby ensuring that the axis of the horizontal section of the copper tube and the axis of the support rod are on the same horizontal plane, further improving the accuracy of the position of the copper tube when it is placed and ensuring the accuracy of the positioning of the copper tube; 4. After the second pressure plate contacts the upper surface of the copper tube, the first pressure plate continues to descend. Since the telescopic rod is in an inclined state, the first pressure plate will shorten the telescopic rod and compress the third elastic member when it descends. After the third elastic member is compressed, it will apply a thrust to the second pressure plate, so that the second pressure plate will apply a thrust to the copper tube toward the vertical section of the lifting frame, so that the vertical section of the copper tube can fit tightly with the V-shaped structure of the positioning plate, further improving the accuracy of the positioning of the copper tube when it is placed, and ensuring the accuracy of the subsequent connection between the copper tube and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall first-view structure of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the welding assembly in the present invention.

[0019] Figure 4 It is a structural schematic diagram of the placement plate in the present invention.

[0020] Figure 5 for Figure 4 Schematic diagram of the enlarged A1 region.

[0021] Figure 6 It is a structural schematic diagram of the lifting frame in the present invention.

[0022] Figure 7 for Figure 6 A magnified schematic diagram of the A2 region in the middle.

[0023] In the accompanying drawings: 1. base; 2. turntable; 3. first rotating power member; 4. ring gear; 5. gear; 6. second rotating power member; 7. side plate; 8. first telescopic member; 9. welding gun; 10. first bracket; 11. placement plate; 12. positioning column; 13. block; 14. first elastic member; 15. second telescopic member; 16. first pull wire; 17. guide shaft; 18. second elastic member; 19. second bracket; 20. lifting plate; 21. servo module; 22. lifting frame; 23. support rod; 24. third telescopic member; 25. first pressure plate; 26. second pressure plate; 27. telescopic rod; 28. third elastic member; 29. ​​limiting column; 30. through groove; 31. splint; 32. second pull wire; 33. positioning plate; 34. screw; 35. dial; 36. third pull wire; 37. welding assembly. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0026] like Figure 1-Figure 7As shown, an automatic brazing device for an air-conditioning stop valve provided by the present invention includes a base 1, a turntable 2 is provided on the base 1, and a first rotating power member 3 that drives the turntable 2 to rotate is fixedly installed on the base 1, a plurality of first brackets 10 and second brackets 19 are fixedly installed on the turntable 2 and are distributed in a circumferential array around the axis of the turntable 2, two groups of symmetrically distributed placement plates 11 are slidably mounted on the first bracket 10, and the end of the placement plate 11 away from the turntable 2 is an L-shaped structure, a positioning column 12 is fixedly installed on the horizontal section of the placement plate 11, and a second elastic member 18 is fixedly installed on the placement plate 11. The end of the second elastic member 18 away from the placement plate 11 is fixedly connected to the middle of the first bracket 10. The second elastic member 18 is distributed along the horizontal section of the first bracket 10. A second telescopic member 15 is fixedly installed on the side of the first bracket 10. Two groups of first pull wires 16 are fixedly connected to the output end of the second telescopic member 15. The end of the first pull wire 16 away from the second telescopic member 15 is fixedly connected to the placement plate 11 on the same side. A guide shaft 17 for changing the moving direction of the first pull wire 16 is fixedly installed on the first bracket 10. A plurality of welding assemblies 37 corresponding to the positions of the first bracket 10 are provided on the base 1; The second bracket 19 corresponds to the position of the first bracket 10, and a lifting plate 20 is slidably installed on the second bracket 19. A lifting frame 22 is provided on the lifting plate 20. The lifting frame 22 is rotatably installed on the end of the lifting plate 20 through a rotating shaft. A dial 35 is fixedly installed on the top of the rotating shaft and a fixing screw is threaded on the dial 35. A support rod 23 is fixedly installed on the side of the vertical section of the lifting frame 22, and a third telescopic member 24 is fixedly installed on the horizontal section of the lifting frame 22. A first pressing plate 25 is provided at the output end of the third telescopic member 24. A positioning plate 33 is slidably installed on the vertical section of the lifting frame 22. One end of the positioning plate 33 is set to a V-shaped structure. The symmetry plane of the V-shaped structure on the positioning plate 33 coincides with the symmetry plane of the corresponding placement plate 11. The axis of the support rod 23 is located on the symmetry plane of the V-shaped structure on the positioning plate 33. The vertical section of the lifting frame 22 is rotatably installed with a screw 34 that drives the positioning plate 33 to move.

[0027] When this embodiment is actually used, the second telescopic member 15 is extended to drive the first pull wire 16 to move according to the model of the stop valve to be welded. When the first pull wire 16 moves, it drives the two sets of placement plates 11 to move inward and compresses the second elastic member 18, so that the spacing between the two sets of positioning posts 12 is located within the spacing range of the two sets of through holes on the stop valve mounting portion. After that, the staff places the stop valve body on the placement plate 11, so that the mounting portion of the stop valve contacts the placement plate 11, and the positioning posts 12 are located in the through holes of the stop valve mounting portion. After that, the second telescopic member 15 is reset. At this time, under the action of the second elastic member 18, the placement plates 11 are moved away from each other, and then the positioning posts 12 will contact the inner side of the through holes on the stop valve mounting portion and complete the clamping and fixing of the stop valve. The positioning plate 33 is driven to move by the screw 34 according to the diameter of the copper tube, so that when the surface of the vertical section of the copper tube contacts the V-shaped structure of the positioning plate 33, its vertical section is coaxially arranged with the connecting hole on the stop valve seat. After the adjustment is completed, the staff inserts the horizontal section of the copper tube on the support rod 23. Under the action of gravity, the vertical section of the copper tube will point vertically downward, pushing the copper tube to move until the vertical section of the copper tube contacts the V-shaped structure of the positioning plate 33. At this time, the vertical section of the copper tube is coaxially arranged with the connecting hole on the stop valve seat. After that, the third telescopic member 24 drives the first pressing plate 25 to move downward to press the copper tube against the support rod 23 to complete the fixation of the copper tube. Subsequently, the servo module 21 drives the lifting frame 22 to move downward through the lifting plate 20 until the vertical section of the copper tube is inserted into the connecting hole on the stop valve and then stops. At this time, the connection between the copper tube and the stop valve is completed. The staff can rotate the dial 35 to change the angle of the lifting frame 22, thereby changing the placement angle of the copper tube, and thus adjusting the angle after the copper tube and the stop valve are connected. After the adjustment is completed, it is fixed by screws, so that the angle of the copper tube can be adjusted before the copper tube is connected to the stop valve and the accurate positioning of the copper tube and the stop valve can be guaranteed, thereby ensuring the accuracy of the connection between the copper tube and the stop valve and improving the quality of subsequent welding. After the connection between the copper tube and the stop valve is completed, the first rotating power part 3 drives the turntable 2 to rotate the set angle, so that the next group of placement plates 11 rotates to the staff's work station. At this time, the staff can continue the loading operation. At the same time, the copper tube and the valve body of the previous group that have completed loading are welded through the welding assembly 37. When the welding is completed, the second telescopic part 15 extends again to drive the two groups of positioning columns 12 to approach, thereby releasing the clamping and fixation of the stop valve mounting part. After that, the lifting plate 20 rises to drive the welded copper tube and the stop valve to rise together. When the welded copper tube and the stop valve are rotated to the staff's work station again, the third telescopic part 24 drives the first pressing plate 25 to move upward to release the fixation of the copper tube. At this time, the staff quickly removes the copper tube and the stop valve and installs new copper tube and stop valve, realizing rapid unloading of the copper tube and the stop valve.

[0028] In an example of this embodiment, the first rotating power component 3 is a first motor, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The turntable 2 is driven to rotate by the first motor, and the second telescopic component 15 and the third telescopic component 24 are respectively the first electric telescopic rod and the third electric telescopic rod, and of course they can also be other components that can actively change the length, such as a hydraulic cylinder. The two groups of placement plates 11 are driven to move synchronously by the first electric telescopic rod, and the first pressure plate 25 is driven to move up and down by the third electric telescopic rod.

[0029] like Figure 3 、 Figure 4As shown, an automatic brazing device for an air-conditioning stop valve provided by the present invention is provided. A block 13 is slidably installed on the horizontal section of the placement plate 11. The block 13 is located between the positioning column 12 and the vertical section at the top of the placement plate 11. A first elastic member 14 is fixedly installed on the side of the block 13. The end of the first elastic member 14 away from the block 13 is fixedly connected to the vertical section at the top of the placement plate 11. A guide rod for guiding the block 13 is slidably installed on the vertical section at the top of the placement plate 11. A slope structure is provided on the side of the block 13 close to the positioning column 12, and the slope structure is located at the top of the block 13.

[0030] When this embodiment is actually used, when the staff places the stop valve, the end of the installation part of the stop valve will contact the inclined surface of the block 13. When the stop valve moves downward, the installation part of the stop valve will push the block 13 to move away from the positioning column 12 through the inclined surface and compress the first elastic member 14. Finally, the end face of the installation part of the stop valve will contact the vertical end face of the block 13. At this time, the first elastic member 14 is in a compressed state and will apply a thrust to the block 13, and then apply a thrust to the installation part of the stop valve, so that the stop valve is clamped and fixed under the action of the thrust, further improving the stability of the stop valve when placed, ensuring that the lower surface of the stop valve installation part is in close contact with the horizontal section of the placement plate 11, avoiding the stop valve from tilting when placed, ensuring the accuracy of the hole positioning on the valve body, and improving the quality of subsequent connection and welding between the valve body and the pipeline.

[0031] In an embodiment of the present invention, the first elastic member 14 is a first spring, and can also be other elastic components such as an elastic ball. The first spring applies thrust to the clamping block 13, thereby clamping and fixing the valve body.

[0032] like Figure 3 、 Figure 4 As shown, an automatic brazing device for an air-conditioning stop valve provided by the present invention, the welding assembly 37 includes a ring gear 4, the ring gear 4 is rotatably mounted on the turntable 2 and the corresponding first bracket 10 is located in the ring gear 4, the rotation axis of the ring gear 4 is located in the symmetry plane of the placement plate 11, a side plate 7 is fixedly mounted on the ring gear 4, a first telescopic member 8 is fixedly mounted on the top of the side plate 7, a welding gun 9 is fixedly mounted on the output end of the first telescopic member 8, and a second rotating power member 6 for driving the ring gear 4 to rotate is provided on the turntable 2.

[0033] In actual application of this embodiment, after the stop valve and the copper tube are connected, the first telescopic member 8 drives the welding gun 9 to move, and the end of the welding gun 9 stops after contacting the connection between the stop valve and the copper tube. At this time, the second rotating power member 6 drives the ring gear 4 to rotate through the gear 5, so that the welding gun 9 can rotate around the connection between the stop valve and the copper tube for one circle to weld, thereby achieving comprehensive welding of the connection between the stop valve and the copper tube. After welding is completed, the first telescopic member 8 drives the welding gun 9 to reset.

[0034] In one embodiment of the present invention, the second rotating power member 6 is a second motor, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The welding gun 9 is driven to rotate by the second motor. The first telescopic member 8 is a first electric telescopic rod, and of course it can also be other components that can actively change the length, such as a hydraulic cylinder. The welding gun 9 is driven to move by the first electric telescopic rod.

[0035] like Figure 6 、 Figure 7 As shown, an automatic brazing device for an air-conditioning stop valve provided by the present invention is provided. A second pressing plate 26 is provided on the first pressing plate 25. The second pressing plate 26 is connected to the first pressing plate 25 by multiple sets of telescopic rods 27. The telescopic rods 27 are all rotatably connected to the first pressing plate 25 and the second pressing plate 26. A third elastic member 28 is provided on the telescopic rod 27. Both ends of the third elastic member 28 are fixedly connected to both ends of the telescopic rod 27. A third pull wire 36 is fixedly connected to the first pressing plate 25. The third pull wire 36 is fixedly connected to the second pressing plate 26. When the third pull wire 36 is in a vertical state, the telescopic rod 27 is in an inclined state.

[0036] Specifically, through grooves 30 are provided at both ends of the second pressure plate 26, and two groups of symmetrically distributed splints 31 are rotatably installed in the through grooves 30. A counterweight block is provided at one end of the splint 31 away from its rotation axis. Multiple groups of second pull wires 32 corresponding to the positions of the splints 31 are fixedly connected to the second pressure plate 26. The second pull wires 32 are connected to the corresponding splints 31. When the second pull wires 32 are in a straight line state, the splint 31 is set at an angle with the vertical plane.

[0037] In actual application of this embodiment, when the third telescopic member 24 drives the first pressure plate 25 to move downward, the clamping plate 31 first contacts the copper tube. Since a counterweight is provided at the lower end of the clamping plate 31, when the second pressure plate 26 moves downward, the clamping plate 31 can apply a thrust to the copper tube from both sides, thereby ensuring that the axis of the horizontal section of the copper tube and the axis of the support rod 23 are located on the same horizontal plane, further improving the accuracy of the position of the copper tube when it is placed, and ensuring the accuracy of the positioning of the copper tube. Afterwards, the second pressure plate 26 contacts the upper surface of the copper tube. At this time, the first pressure plate 25 continues to descend. Since the telescopic rod 27 is in an inclined state, the first pressure plate 25 will shorten the telescopic rod 27 and compress the third elastic member 28 when it descends. After the third elastic member 28 is compressed, it will apply a thrust to the second pressure plate 26, so that the second pressure plate 26 will apply a thrust to the copper tube toward the vertical section of the lifting frame 22, so that the vertical section of the copper tube can be tightly attached to the V-shaped structure of the positioning plate 33, further improving the accuracy of positioning the copper tube when it is placed, and ensuring the accuracy of the subsequent connection between the copper tube and the valve body. When the limit column 29 contacts the second pressure plate 26, the copper tube can be pressed tightly against the support rod 23, and the position where the second pressure plate 26 contacts the copper tube corresponds to the support rod 23, avoiding deformation of the copper tube during clamping and fixing.

[0038] In one embodiment of the present invention, the third elastic member 28 is a third spring, and can also be other elastic components such as an elastic ball. The third spring is compressed to apply a lateral thrust to the second pressure plate 26 .

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An automatic brazing device for an air conditioning stop valve, comprising a base (1), characterized in that: A turntable (2) is arranged on the base (1), and a first rotating power member (3) for driving the turntable (2) to rotate is fixedly mounted on the base (1); a plurality of first brackets (10) and second brackets (19) are fixedly mounted on the turntable (2) and are distributed in a circular array around the axis of the turntable (2); two groups of symmetrically distributed placement plates (11) are slidably mounted on the first bracket (10); the end of the placement plate (11) away from the turntable (2) is an L-shaped structure; a positioning column (12) is fixedly mounted on the horizontal section of the placement plate (11); a second elastic member (18) is fixedly mounted on the placement plate (11); the end of the second elastic member (18) away from the placement plate (11) is fixedly connected to the middle part of the first bracket (10); and a plurality of welding components (37) corresponding to the position of the first bracket (10) are arranged on the base (1); The second bracket (19) corresponds to the first bracket (10) in position, and a lifting plate (20) is slidably mounted on the second bracket (19), a lifting frame (22) is arranged on the lifting plate (20), a support rod (23) is fixedly mounted on the side of the vertical section of the lifting frame (22), a third telescopic member (24) is fixedly mounted on the horizontal section of the lifting frame (22), a first pressing plate (25) is arranged at the output end of the third telescopic member (24), a positioning plate (33) is slidably mounted on the vertical section of the lifting frame (22), one end of the positioning plate (33) is arranged in a V-shaped structure, and a screw rod (34) for driving the positioning plate (33) to move is rotatably mounted on the vertical section of the lifting frame (22).

2. The automatic brazing equipment for air conditioning stop valve according to claim 1 is characterized in that: A block (13) is slidably mounted on the horizontal section of the placement plate (11), the block (13) being located between the positioning column (12) and the vertical section at the top of the placement plate (11), a first elastic member (14) is fixedly mounted on the side of the block (13), one end of the first elastic member (14) away from the block (13) is fixedly connected to the vertical section at the top of the placement plate (11), a guide rod for guiding the block (13) is slidably mounted on the vertical section at the top of the placement plate (11), and an inclined surface structure is provided on the side of the block (13) close to the positioning column (12), the inclined surface structure being located at the top of the block (13).

3. The automatic brazing equipment for air conditioning stop valve according to claim 1 is characterized in that: A second telescopic member (15) is fixedly mounted on the side of the first bracket (10); two groups of first pull wires (16) are fixedly connected to the output end of the second telescopic member (15); one end of the first pull wire (16) away from the second telescopic member (15) is fixedly connected to the placement plate (11) on the same side; and a guide shaft (17) for changing the moving direction of the first pull wire (16) is fixedly mounted on the first bracket (10).

4. The automatic brazing equipment for air conditioning stop valve according to claim 1, characterized in that: The symmetry plane of the V-shaped structure on the positioning plate (33) coincides with the symmetry plane of the corresponding placement plate (11), and the axis of the support rod (23) is located on the symmetry plane of the V-shaped structure on the positioning plate (33).

5. The automatic brazing equipment for air conditioning stop valve according to claim 1 is characterized in that: The welding assembly (37) comprises a gear ring (4), the gear ring (4) is rotatably mounted on a turntable (2) and a corresponding first bracket (10) is located inside the gear ring (4), the rotation axis of the gear ring (4) is located within a symmetric plane of a placement plate (11), a side plate (7) is fixedly mounted on the gear ring (4), a first telescopic member (8) is fixedly mounted on the top of the side plate (7), a welding gun (9) is fixedly mounted on the output end of the first telescopic member (8), and a second rotating power member (6) for driving the gear ring (4) to rotate is provided on the turntable (2).

6. The automatic brazing equipment for air conditioning stop valve according to claim 1, characterized in that: The lifting frame (22) is rotatably mounted on the end of the lifting plate (20) via a rotating shaft, a dial (35) is fixedly mounted on the top of the rotating shaft, and a fixing screw is threadedly mounted on the dial (35).

7. The automatic brazing equipment for air conditioning stop valve according to claim 6, characterized in that: A second pressing plate (26) is arranged on the first pressing plate (25), and the second pressing plate (26) is connected to the first pressing plate (25) via a plurality of telescopic rods (27). The telescopic rods (27) are rotatably connected to the first pressing plate (25) and the second pressing plate (26). A third elastic member (28) is arranged on the telescopic rod (27), and two ends of the third elastic member (28) are fixedly connected to two ends of the telescopic rod (27). A third pull wire (36) is fixedly connected to the first pressing plate (25), and the third pull wire (36) is fixedly connected to the second pressing plate (26). When the third pull wire (36) is in a vertical state, the telescopic rod (27) is in an inclined state.

8. The automatic brazing equipment for air conditioning stop valve according to claim 7, characterized in that: Both ends of the second pressure plate (26) are provided with through grooves (30), and two groups of symmetrically distributed clamping plates (31) are rotatably mounted in the through grooves (30). A counterweight block is arranged at one end of the clamping plate (31) away from its rotation axis. A plurality of groups of second pull wires (32) corresponding to the positions of the clamping plates (31) are fixedly connected to the second pressure plate (26), and the second pull wires (32) are connected to the corresponding clamping plates (31). When the second pull wires (32) are in a straight line state, an angle is arranged between the clamping plates (31) and the vertical plane.

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