Welding machining device and welding method for buckle type pipe fitting

Abstract

The invention relates to the technical field of pipe fitting welding, and discloses a buckle type pipe fitting welding machining device and a welding method.The buckle type pipe fitting welding machining device comprises first pipelines and a second pipeline, the two first pipelines or the first pipeline and the second pipeline are in coaxial buckle butt joint, and moving assemblies are arranged in the first pipelines and the second pipeline in a sliding mode; a rotating rod is arranged between the two moving assemblies, a first end plate abutting against the inner wall of the pipeline is arranged on the rotating rod, a dislocation triggering mechanism is arranged on the first end plate and comprises a first triggering rod and a second triggering rod which are inserted into the two ends of the first end plate, and a welding wire for welding the butt joint gap of the pipeline is further arranged on the rotating rod. The position of the first end plate at the joint of the two first pipelines or the joint of the first pipeline and the second pipeline is adjusted by driving the crawler belt assembly, when a triangular block on the first end plate abuts against the joint of the two pipelines, movement of the driving crawler belt assembly is stopped, and positioning of the rotating rod in the axial direction is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting welding, and in particular to a welding processing device and a welding method for a snap-on pipe fitting. Background Art

[0002] Pipe fittings are components in pipeline systems that connect, control, change direction, divert, seal, and support. Due to site and transportation restrictions, pipe fittings cannot be directly produced in the production process to meet market demand for a certain length. Usually, multiple pipe fittings are welded together before use. However, this welding method usually has the following problems: First of all, the conventional snap-on pipe welding has the phenomenon of unstable positioning, that is, displacement deviation occurs during the positioning process, that is, the two pipes are not on the same axis. If they are welded directly, the welding will be scrapped. Therefore, during the welding process, the positioned pipes need to be welded, and then welded at the butt gap. However, some existing welding devices will have welding deviations.

[0003] Secondly, for welding pipes with different inner diameters, it is necessary to deflect the welding wire at the welding point. This can effectively ensure that the welding point is located at the junction of pipes with different inner diameters during the welding process. However, the existing welding device cannot perform self-angle adjustment for welding two pipes with different inner diameters.

[0004] Therefore, we designed a welding processing device and a welding method for snap-on pipe fittings. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art of welding pipes with different inner diameters, such as the inability to effectively ensure that the welding point of the welding wire is located at the junction of pipes with different inner diameters during the welding process, and the inability to perform self-angle adjustment for welding two pipes with different inner diameters. A welding processing device and welding method for a snap-on pipe fitting are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A welding processing device for a snap-on pipe fitting includes a first pipe and a second pipe. The two first pipes or the first pipe and the second pipe are coaxially snap-jointed. A moving component slides inside the first pipe and the second pipe. A rotating rod is provided between the two moving components. The rotating rod is provided with a first end plate that abuts against the inner wall of the pipe. The first end plate is provided with a dislocation trigger mechanism. The dislocation trigger mechanism includes a first trigger rod and a second trigger rod inserted at both ends of the first end plate. The rotating rod is also provided with a welding wire for welding the pipe joint gap. The rotating rod is also provided with a welding wire swinging component for adjusting the deflection angle of the welding wire. The welding wire swinging component is connected to the dislocation trigger mechanism through an electronic control device.

[0007] Preferably, the moving assembly includes a moving ring, on which a plurality of electric telescopic rods are provided, and the output end of the electric telescopic rod is provided with a driving track assembly that fits the inner wall of the pipe, an end ring is provided on the moving ring, and the end ring is coaxially slid on the moving ring through the through rod.

[0008] Preferably, electric drive rings are provided at both ends of the rotating rod, and the electric drive rings are connected via magnetic sliding groove sliders.

[0009] Preferably, a push rod is vertically arranged on the rotating rod, the first end plate is fixed to the end of the push rod, and a compression spring is arranged between the push rod and the rotating rod to push the first end plate against the inner wall of the pipe.

[0010] Preferably, the misalignment triggering mechanism includes: The triangular block is fixed on the side of the first end plate facing the inner wall of the pipe, and the triangular block and the stop rod are located in the same vertical plane. The first trigger rod and the second trigger rod slide symmetrically at both ends of the first end plate through the through hole. The tops of the first trigger rod and the second trigger rod are fixed with end plates, and the outer sides of the first trigger rod and the second trigger rod are respectively sleeved with a second return spring that drives the first trigger rod and the second trigger rod to return and retract; The sliding rheostat is arranged on the outer side wall of the abutment rod, the first trigger rod and the second trigger rod are respectively abutted against the sliding rheostat through the first metal sheet and the second metal sheet, and the first metal sheet and the second metal sheet are respectively located on both sides of the sliding rheostat.

[0011] Preferably, the misalignment trigger mechanism further comprises: An insulating ring, wherein the ends of the first trigger rod and the second trigger rod are both provided with round heads, and the first trigger rod and the second trigger rod are made of metal. The insulating ring is covered with an annular groove on the outer side walls of the first trigger rod and the second trigger rod, and metal sheets are symmetrically arranged in the through hole of the first end plate; The height of the triangular block is the same as the distance from the insulating ring to the ends of the first trigger rod and the second trigger rod.

[0012] Preferably, two first electromagnetic generators are symmetrically arranged on the rotating rod, and a mobile spot welding frame slides between the two first electromagnetic generators, first magnet sheets are provided on both sides of the mobile spot welding frame, and first reset springs connected to the first electromagnetic generators are provided on both sides of the mobile spot welding frame.

[0013] Preferably, the welding wire oscillation assembly comprises: A base, a rotating disk is rotated on the base through a rotating shaft, a telescopic rod is slid along the diameter of the rotating disk, and a welding wire is fixed to the end of the telescopic rod, and an elastic telescopic component is provided on the rotating disk to push the telescopic rod to extend and retract; The gear is coaxially fixed on the rotating shaft, an insertion rod is inserted through the base, and second end plates are fixed at both ends of the insertion rod, and a rack meshing with the gear is provided between the two second end plates.

[0014] Preferably, the welding wire oscillation assembly further comprises: The second electromagnetic generator is provided in two pieces and is symmetrically arranged on both sides of the base. A second magnet sheet is provided on the side of the second end plate facing the base, and a third reset spring is provided between the second end plate and the base.

[0015] A welding method for a snap-on pipe fitting welding processing device, the specific operation method is as follows: S1: First, coaxially dock the two first pipes or the first pipe and the second pipe. Then, place the moving assembly in each of the two pipes. Turn on the electric telescopic rod to allow the multiple drive track assemblies to abut against the inner walls of the first and second pipes. At this point, the two moving rings are coaxially arranged. Then, install the rotating rod in the second pipe with the smaller inner diameter of the docked pipes or in the first pipe with the same inner diameter as the docked pipes. S2: Then, the driving crawler assembly brings the two moving rings closer to each other, and the electric driving rings at both ends of the rotating rod are clamped on the end rings through the magnetic sliding groove sliders, wherein the abutting rod is abutted against the inner wall of the second pipe with a smaller inner diameter in the docking pipe or the inner wall of the first pipe with the same inner diameter as the docking pipes under the action of the compression spring, and the position of the first end plate at the docking point of the two first pipes or the first pipe and the second pipe is adjusted by the driving crawler assembly. When the triangular block on the first end plate abuts against the junction of the two pipes, the movement of the driving crawler assembly is stopped, and the positioning of the rotating rod along the axial direction is completed; S3: Then, when the two butted pipes are first pipes with the same inner diameter, there is no height difference between the first trigger rod and the second trigger rod. Then, the first metal sheet and the second metal sheet are located at the same horizontal plane of the sliding rheostat. At the same time, the insulating rings covering the outer walls of the first trigger rod and the second trigger rod will continue to block the two metal sheets symmetrically arranged in the through hole. At this time, the electronic control device will not be triggered to start any of the two first electromagnetic generators on the rotating rod. The mobile spot welding frame is located at the connection point of the two first pipes with the same inner diameter. At this time, the mobile spot welding frame is fixed to the rotating rod by an electric clamp, and the telescopic rod carried by the rotating disk on the base is in a vertical state. The welding wire at the end of the telescopic rod can weld the gap between the two first pipes. When the two butted pipes are the first pipe and the second pipe with different inner diameters, the first trigger rod and the second trigger rod will be pressed against the first pipe and the second pipe with different inner diameters through the second return spring. At this time, the insulating ring on the first trigger rod or the second trigger rod will separate from the two metal sheets symmetrically arranged in the through hole, allowing the circuit to be connected, which will turn on the first electromagnetic generator on the same side of the two first electromagnetic generators on the rotating rod, and then drive the mobile spot welding frame to deviate to the first pipe with larger inner diameter through magnetic attraction; at the same time, a height difference will appear between the first trigger rod and the second trigger rod, that is, the resistance between the first metal sheet and the second metal sheet will increase, thereby also triggering the electronic control device to turn on. For the second electromagnetic generator on the same side of the base, the smaller the current is, the smaller the magnetic field generated by the electronic control device is, which in turn drives the rack and the gear to engage. Then, the meshing movement causes the gear to rotate the rotating disk with a smaller amplitude. In this way, the greater the relative difference in the inner diameters of the two pipes for the snap connection, the smaller the welding wire deflection angle. At this time, the welding position is closer to the first pipe with a larger inner diameter. Therefore, during the welding process, due to the greater the relative difference in the inner diameters of the pipes, the welding point can be offset as much as possible to avoid the occurrence of welding penetration in direct spot welding. At the same time, the height difference is formed into an inclined slope through welding, so that a smooth surface appears at the joint of the pipes, and the welding of the two pipes is also completed.

[0016] The beneficial effects of the present invention are: 1. The present invention adjusts the position of the first end plate at the joint of the two first pipes or the first pipe and the second pipe by driving the crawler assembly. When the triangular block on the first end plate abuts the joint of the two pipes, the movement of the crawler assembly is stopped, completing the positioning of the rotating rod along the axial direction.

[0017] 2. The present invention adopts the snap-fit ​​connection method. The greater the relative difference in the inner diameters of the two pipes, the smaller the deflection angle of the welding wire. At this time, the welding position is closer to the first pipe with a larger inner diameter. Therefore, during the welding process, due to the greater the relative difference in the inner diameters of the pipes, the welding point can be offset as much as possible to avoid the occurrence of welding penetration caused by direct spot welding. At the same time, the height difference is formed by welding to form an inclined slope, so that a smooth surface appears at the pipe joint, and the welding of the two pipes is also completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the snap-fit ​​welding of two first pipes in a snap-fit ​​pipe welding processing device proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure at point A in the middle; Figure 3 This is a structural schematic diagram of the snap-fit ​​welding of the first pipe and the second pipe in the snap-fit ​​pipe welding processing device proposed by the present invention; Figure 4 This is a front view of the buckle welding of two first pipes in a buckle-type pipe fitting welding processing device proposed by the present invention; Figure 5 A front view of the snap-fit ​​welding of a first pipe and a second pipe in a snap-fit ​​pipe welding device proposed by the present invention; Figure 6 This is a structural schematic diagram of a moving component in a welding processing device for a snap-on pipe fitting proposed by the present invention; Figure 7 This is a schematic structural diagram of a dislocation trigger mechanism in a welding processing device for a snap-on pipe fitting proposed by the present invention; Figure 8 This is a front view of a dislocation trigger mechanism in a welding processing device for a snap-on pipe fitting proposed by the present invention; Figure 9 This is a schematic diagram of a first state of a welding wire swing assembly in a welding processing device for a snap-on pipe fitting proposed by the present invention; Figure 10 This is a schematic diagram of the second state of the welding wire swing assembly in the welding processing device for the snap-on pipe fitting proposed by the present invention.

[0019] In the figure: 1. first pipeline; 2. second pipeline; 3. moving ring; 4. driving crawler assembly; 5. electric telescopic rod; 6. end ring; 7. electric drive ring; 8. rotating rod; 9. mobile spot welding frame; 10. welding wire; 11. compression spring; 12. push rod; 13. first end plate; 14. first electromagnetic generator; 15. first return spring; 16. first trigger rod; 17. second trigger rod; 18. round head; 19. insulating ring; 20. end plate; 21. second return spring; 22. first metal sheet; 23. second metal sheet; 24. sliding rheostat; 25. triangular block; 26. base; 27. rotating disk; 28. telescopic rod; 29. ​​rotating shaft; 30. gear; 31. rack; 32. second end plate; 33. second electromagnetic generator; 34. third return spring. DETAILED DESCRIPTION

[0020] Reference Figures 1-10 A welding processing device for a snap-on pipe fitting includes a first pipe 1 and a second pipe 2. The two first pipes 1 or the first pipe 1 and the second pipe 2 are coaxially snap-fitted. A moving component slides inside the first pipe 1 and the second pipe 2. Figure 6 State, the moving assembly includes a moving ring 3, a plurality of electric telescopic rods 5 are provided on the moving ring 3, and the output end of the electric telescopic rod 5 is provided with a driving track assembly 4 that fits the inner wall of the pipeline, and an end ring 6 is provided on the moving ring 3, and the end ring 6 is coaxially slid on the moving ring 3 through the through rod, wherein the driving track assembly 4 is the existing technology, and the belt is driven to move in the pipeline through the conveying roller.

[0021] Therefore, after the two first pipes 1 or the first pipe 1 and the second pipe 2 are coaxially snap-fitted, the movable components are placed in the two pipes respectively, the electric telescopic rod 5 is turned on, and the multiple drive track components 4 are allowed to abut against the inner walls of the first pipe 1 and the second pipe 2, thereby providing support for the coaxial setting of the two movable rings 3.

[0022] A rotating rod 8 is arranged between the two moving components, and electric drive rings 7 are arranged at both ends of the rotating rod 8, and the electric drive rings 7 are connected by a magnetic slide slider, wherein the rotating rod 8 is installed in the second pipe 2 with a smaller inner diameter in the docking pipe or in the first pipe 1 with the same inner diameter as the docking pipe. In this way, it can be ensured that when the supporting rod 12 moves with the first end plate 13, it moves from the second pipe 2 with a smaller inner diameter toward the first pipe 1 with a larger inner diameter. It can effectively ensure that the first trigger rod 16 or the second trigger rod 17 will not be hindered in the process of moving from the small inner diameter to the large inner diameter, which is convenient for the subsequent triggering effect.

[0023] Let the driving track assembly 4 bring the two moving rings 3 closer to each other, and let the electric driving rings 7 at both ends of the rotating rod 8 be clamped on the end ring 6 through the magnetic slide slider, wherein the push rod 12 is pressed against the inner wall of the second pipe 2 with a smaller inner diameter in the docking pipe or the inner wall of the first pipe 1 with the same inner diameter as the docking pipe under the action of the compression spring 11, and the position of the first end plate 13 at the docking point of the two first pipes 1 or the first pipe 1 and the second pipe 2 is adjusted by driving the track assembly 4.

[0024] A first end plate 13 is provided on the rotating rod 8, which is against the inner wall of the pipe. A supporting rod 12 is vertically provided on the rotating rod 8. The first end plate 13 is fixed to the end of the supporting rod 12, and a compression spring 11 is provided between the supporting rod 12 and the rotating rod 8 to push the first end plate 13 against the inner wall of the pipe. This can ensure that the supporting rod 12 always abuts against the first pipe 1 and the second pipe 2.

[0025] A dislocation trigger mechanism is provided on the first end plate 13, and the dislocation trigger mechanism includes a first trigger rod 16 and a second trigger rod 17 inserted at both ends of the first end plate 13. The dislocation trigger mechanism includes a triangular block 25, which is fixed on the side of the first end plate 13 facing the inner wall of the pipe, and the triangular block 25 and the push rod 12 are located in the same vertical plane. When the triangular block 25 on the first end plate 13 is against the connection between the two pipes, the movement of the driving track assembly 4 is stopped, and the positioning of the rotating rod 8 along the axial direction is completed.

[0026] The first trigger rod 16 and the second trigger rod 17 slide symmetrically at both ends of the first end plate 13 through the through hole. An end plate 20 is fixed to the top of the first trigger rod 16 and the second trigger rod 17, and the outer side walls of the first trigger rod 16 and the second trigger rod 17 are sleeved with a second return spring 21 that drives the first trigger rod 16 and the second trigger rod 17 to return and retract.

[0027] The sliding rheostat 24 is arranged on the outer side wall of the supporting rod 12, and the first trigger rod 16 and the second trigger rod 17 are respectively supported against the sliding rheostat 24 through the first metal sheet 22 and the second metal sheet 23, and the first metal sheet 22 and the second metal sheet 23 are respectively located on both sides of the sliding rheostat 24. When the two docking pipes are the first pipes 1 with the same inner diameter, there is no height difference between the first trigger rod 16 and the second trigger rod 17 at this time, and the first metal sheet 22 and the second metal sheet 23 are located on the same horizontal plane of the sliding rheostat 24.

[0028] Two first electromagnetic generators 14 are symmetrically arranged on the rotating rod 8, and a mobile spot welding frame 9 slides between the two first electromagnetic generators 14. First magnet sheets are provided on both sides of the mobile spot welding frame 9, and first return springs 15 connected to the first electromagnetic generators 14 are provided on both sides of the mobile spot welding frame 9.

[0029] The dislocation trigger mechanism also includes an insulating ring 19. A round head 18 is provided at the end of the first trigger rod 16 and the second trigger rod 17. The first trigger rod 16 and the second trigger rod 17 are made of metal. The insulating ring 19 is covered with the outer wall of the first trigger rod 16 and the second trigger rod 17 through the ring groove. Metal sheets are symmetrically arranged in the through hole of the first end plate 13. The height of the triangular block 25 is the same as the distance from the insulating ring 19 to the end of the first trigger rod 16 and the second trigger rod 17. Therefore, the insulating ring 19 covering the outer wall of the first trigger rod 16 and the second trigger rod 17 will continue to block the two metal sheets symmetrically arranged in the through hole, and at this time, the electronic control device will not be triggered to turn on any of the two first electromagnetic generators 14 on the rotating rod 8.

[0030] The rotating rod 8 is also provided with a welding wire 10 for welding the joint gap of the pipe. The rotating rod 8 is also provided with a welding wire swinging assembly for adjusting the deflection angle of the welding wire 10. The welding wire swinging assembly includes a base 26, and a rotating disk 27 is rotated on the base 26 through a rotating shaft 29, and a telescopic rod 28 is slid along the diameter on the rotating disk 27, and the welding wire 10 is fixed at the end of the telescopic rod 28. The rotating disk 27 is provided with an elastic telescopic assembly for pushing the telescopic rod 28 to extend and retract, wherein the elastic telescopic assembly adopts an electromagnetic assembly and a spring assembly, and the external driving mechanism drives the electric drive ring 7 with the rotating rod 8 to rotate on the end ring 6, wherein the external driving mechanism and the elastic telescopic assembly are existing technologies, which will drive the welding wire 10 on the mobile spot welding frame 9 to move in a circular motion and perform intermittent spot welding operations, thereby realizing the connection spot welding operation between the two pipes.

[0031] The mobile spot welding frame 9 is located at the junction of the two first pipes 1 with the same inner diameter. At this time, the mobile spot welding frame 9 is fixed on the rotating rod 8 by an electric clamp, and the telescopic rod 28 carried by the rotating disk 27 on the base 26 is in a vertical state. The welding wire 10 at the end of the telescopic rod 28 can weld the gap between the two first pipes 1.

[0032] When the two butted pipes are the first pipe 1 and the second pipe 2 of different inner diameters, the first trigger rod 16 and the second trigger rod 17 will be pressed against the first pipe 1 and the second pipe 2 of different inner diameters via the second return spring 21. At this time, the insulating ring 19 on the first trigger rod 16 or the second trigger rod 17 will separate from the two metal sheets symmetrically arranged in the through hole, allowing the circuit to be connected. This will activate the first electromagnetic generator 14 on the same side of the two first electromagnetic generators 14 on the rotating rod 8, and then drive the movable spot welding frame 9 to shift to the first pipe 1 with the larger inner diameter through magnetic attraction. At the same time, a height difference will appear between the first trigger rod 16 and the second trigger rod 17, that is, the resistance between the first metal sheet 22 and the second metal sheet 23 will increase.

[0033] The welding wire swing assembly is connected to the misalignment trigger mechanism through an electronic control device. The welding wire swing assembly also includes a second electromagnetic generator 33. The second electromagnetic generator 33 is set in two and is symmetrically arranged on both sides of the base 26. The second end plate 32 is provided with a second magnet sheet on the side facing the base 26. A third return spring 34 is provided between the second end plate 32 and the base 26. The gear 30 is coaxially fixed on the rotating shaft 29. A rod is inserted through the base 26, and a second end plate 32 is fixed at both ends of the rod. A rack 31 meshing with the gear 30 is provided between the two second end plates 32, which also triggers the electronic control device to turn on the second electromagnetic generator 33 on the same side of the base 26. The smaller the current, the smaller the magnetic field generated by the second electromagnetic generator 33 by the electronic control device, which in turn pushes the rack 31 to engage with the gear 30. The meshing movement causes the gear 30 to rotate with the rotating disk 27 to a smaller extent. In this way, the greater the relative difference in the inner diameters of the two pipes for the snap-fit ​​connection, the smaller the deflection angle of the welding wire 10. At this time, the welding position is closer to the first pipe 1 with a larger inner diameter. Therefore, during the welding process, due to the greater the relative difference in the inner diameters of the pipes, the welding point can be offset as much as possible to avoid the occurrence of welding penetration caused by direct spot welding. At the same time, the height difference is formed into an inclined slope through welding, so that a smooth surface appears at the pipe joint, and the welding of the two pipes is also completed.

[0034] A welding method for a snap-on pipe fitting welding processing device, the specific operation method is as follows: S1: First, coaxially dock the two first pipes 1 or the first pipe 1 and the second pipe 2, then place the moving assembly in each of the two pipes, turn on the electric telescopic rod 5, and allow the multiple drive track assemblies 4 to abut against the inner walls of the first pipe 1 and the second pipe 2. At this time, the two moving rings 3 are coaxially arranged. Then, install the rotating rod 8 in the second pipe 2 with the smaller inner diameter of the docked pipes, or in the first pipe 1 with the same inner diameter as the docked pipes. S2: Then let the driving crawler assembly 4 bring the two moving rings 3 closer to each other, let the electric driving rings 7 at both ends of the rotating rod 8 be clamped on the end ring 6 through the magnetic sliding groove slider, wherein the push rod 12 is pressed against the inner wall of the second pipe 2 with a smaller inner diameter in the docking pipe or the inner wall of the first pipe 1 with the same inner diameter as the docking pipe under the action of the compression spring 11, and the position of the first end plate 13 at the docking point of the two first pipes 1 or the first pipe 1 and the second pipe 2 is adjusted by driving the crawler assembly 4. When the triangular block 25 on the first end plate 13 is pressed against the junction of the two pipes, the movement of the driving crawler assembly 4 is stopped, and the positioning of the rotating rod 8 along the axial direction is completed; S3: Then, when the two butted pipes are first pipes 1 with the same inner diameter, there is no height difference between the first trigger rod 16 and the second trigger rod 17. Then, the first metal sheet 22 and the second metal sheet 23 are located on the same horizontal plane of the sliding rheostat 24. At the same time, the insulating ring 19 wrapped around the outer wall of the first trigger rod 16 and the second trigger rod 17 will continue to block the two metal sheets symmetrically arranged in the through hole. At this time, the electronic control device will not be triggered to start any of the two first electromagnetic generators 14 on the rotating rod 8. The mobile spot welding frame 9 is located at the connection position of the two first pipes 1 with the same inner diameter. At this time, the mobile spot welding frame 9 is fixed to the rotating rod 8 by the electric clamp, and the telescopic rod 28 carried by the rotating disk 27 on the base 26 is in a vertical state. The welding wire 10 at the end of the telescopic rod 28 can weld the gap between the two first pipes 1. When the two butted pipes are the first pipe 1 and the second pipe 2 with different inner diameters, the first trigger rod 16 and the second trigger rod 17 will be pressed against the first pipe 1 and the second pipe 2 with different inner diameters through the second return spring 21. At this time, the insulating ring 19 on the first trigger rod 16 or the second trigger rod 17 will be separated from the two metal sheets symmetrically arranged in the through hole, so that the circuit is connected, which will turn on the first electromagnetic generator 14 on the same side of the two first electromagnetic generators 14 on the rotating rod 8, and then drive the mobile spot welding frame 9 to deviate to the first pipe 1 with the larger inner diameter through magnetic attraction; at the same time, a height difference will appear between the first trigger rod 16 and the second trigger rod 17, that is, the resistance between the first metal sheet 22 and the second metal sheet 23 will increase, and the same triggering will occur. The power generation control device turns on the second electromagnetic generator 33 on the same side of the base 26. The smaller the current, the smaller the magnetic field generated by the second electromagnetic generator 33 by the electronic control device, thereby pushing the rack 31 to engage with the gear 30. The meshing movement causes the gear 30 to rotate with the rotating disk 27 to a smaller extent. In this way, the greater the relative difference in the inner diameters of the two pipes for the snap-fit ​​connection, the smaller the deflection angle of the welding wire 10. At this time, the welding position point is closer to the first pipe 1 with a larger inner diameter. Therefore, during the welding process, due to the greater the relative difference in the inner diameters of the pipes, the welding point can be offset as much as possible to avoid the occurrence of welding penetration caused by direct spot welding. At the same time, the height difference is formed into an inclined slope through welding, so that a smooth surface appears at the connection between the pipes, and the welding of the two pipes is also completed.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A welding processing device for a snap-on pipe fitting, comprising a first pipe and a second pipe, wherein the two first pipes or the first pipe and the second pipe are coaxially snap-jointed, characterized in that: A moving assembly is sliding in each of the first and second pipes, a rotating rod is provided between the two moving assemblies, a first end plate is provided on the rotating rod and abuts against the inner wall of the pipe, a dislocation trigger mechanism is provided on the first end plate, the dislocation trigger mechanism includes a first trigger rod and a second trigger rod inserted at both ends of the first end plate, a welding wire for welding the pipe joint gap is also provided on the rotating rod, a welding wire swinging assembly for adjusting the deflection angle of the welding wire is also provided on the rotating rod, and the welding wire swinging assembly is connected to the dislocation trigger mechanism through an electronic control device.

2. A welding processing device for a snap-on pipe fitting according to claim 1, characterized in that: The moving assembly includes a moving ring, on which are provided a plurality of electric telescopic rods, and the output end of the electric telescopic rod is provided with a driving track assembly that fits the inner wall of the pipe, and an end ring is provided on the moving ring, and the end ring is coaxially slid on the moving ring through the through rod.

3. A welding processing device for a snap-on pipe fitting according to claim 2, characterized in that: Electric drive rings are provided at both ends of the rotating rod, and the electric drive rings are connected through a magnetic sliding groove slider.

4. A welding processing device for a snap-on pipe fitting according to claim 3, characterized in that: A push rod is vertically arranged on the rotating rod, the first end plate is fixed to the end of the push rod, and a compression spring is arranged between the push rod and the rotating rod to push the first end plate against the inner wall of the pipeline.

5. The welding processing device for a snap-on pipe fitting according to claim 4, characterized in that: The misalignment trigger mechanism includes: The triangular block is fixed on the side of the first end plate facing the inner wall of the pipe, and the triangular block and the stop rod are located in the same vertical plane. The first trigger rod and the second trigger rod slide symmetrically at both ends of the first end plate through the through hole. The tops of the first trigger rod and the second trigger rod are fixed with end plates, and the outer sides of the first trigger rod and the second trigger rod are respectively sleeved with a second return spring that drives the first trigger rod and the second trigger rod to return and retract; The sliding rheostat is arranged on the outer side wall of the abutment rod, the first trigger rod and the second trigger rod are respectively abutted against the sliding rheostat through the first metal sheet and the second metal sheet, and the first metal sheet and the second metal sheet are respectively located on both sides of the sliding rheostat.

6. A welding processing device for a snap-on pipe fitting according to claim 5, characterized in that: The misalignment trigger mechanism also includes: An insulating ring, wherein the ends of the first trigger rod and the second trigger rod are both provided with round heads, and the first trigger rod and the second trigger rod are made of metal. The insulating ring is covered with an annular groove on the outer side walls of the first trigger rod and the second trigger rod, and metal sheets are symmetrically arranged in the through hole of the first end plate; The height of the triangular block is the same as the distance from the insulating ring to the ends of the first trigger rod and the second trigger rod.

7. A welding processing device for a snap-on pipe fitting according to claim 6, characterized in that: Two first electromagnetic generators are symmetrically arranged on the rotating rod, and a mobile spot welding frame slides between the two first electromagnetic generators. First magnet sheets are provided on both sides of the mobile spot welding frame, and first reset springs connected to the first electromagnetic generators are provided on both sides of the mobile spot welding frame.

8. The welding processing device for a snap-on pipe fitting according to claim 7, characterized in that: The wire weaving assembly includes: A base, a rotating disk is rotated on the base through a rotating shaft, a telescopic rod is slid along the diameter of the rotating disk, and a welding wire is fixed to the end of the telescopic rod, and an elastic telescopic component is provided on the rotating disk to push the telescopic rod to extend and retract; The gear is coaxially fixed on the rotating shaft, an insertion rod is inserted through the base, and second end plates are fixed at both ends of the insertion rod, and a rack meshing with the gear is provided between the two second end plates.

9. A welding processing device for a snap-on pipe fitting according to claim 8, characterized in that: The wire weaving assembly also includes: The second electromagnetic generator is provided in two pieces and is symmetrically arranged on both sides of the base. A second magnet sheet is provided on the side of the second end plate facing the base, and a third reset spring is provided between the second end plate and the base.

10. A welding method for a snap-fit ​​pipe fitting welding device, applied to the snap-fit ​​pipe fitting welding device of claim 9, characterized in that: The specific operation method is as follows: S1: First, coaxially dock the two first pipes or the first pipe and the second pipe. Then, place the moving assembly in each of the two pipes. Turn on the electric telescopic rod to allow the multiple drive track assemblies to abut against the inner walls of the first and second pipes. At this point, the two moving rings are coaxially arranged. Then, install the rotating rod in the second pipe with the smaller inner diameter of the docked pipes or in the first pipe with the same inner diameter as the docked pipes. S2: Then, the driving crawler assembly brings the two moving rings closer to each other, and the electric driving rings at both ends of the rotating rod are clamped on the end rings through the magnetic sliding groove sliders, wherein the abutting rod is abutted against the inner wall of the second pipe with a smaller inner diameter in the docking pipe or the inner wall of the first pipe with the same inner diameter as the docking pipes under the action of the compression spring, and the position of the first end plate at the docking point of the two first pipes or the first pipe and the second pipe is adjusted by the driving crawler assembly. When the triangular block on the first end plate abuts against the junction of the two pipes, the movement of the driving crawler assembly is stopped, and the positioning of the rotating rod along the axial direction is completed; S3: Then, when the two butted pipes are first pipes with the same inner diameter, there is no height difference between the first trigger rod and the second trigger rod. Then, the first metal sheet and the second metal sheet are located at the same horizontal plane of the sliding rheostat. At the same time, the insulating rings covering the outer walls of the first trigger rod and the second trigger rod will continue to block the two metal sheets symmetrically arranged in the through hole. At this time, the electronic control device will not be triggered to start any of the two first electromagnetic generators on the rotating rod. The mobile spot welding frame is located at the connection point of the two first pipes with the same inner diameter. At this time, the mobile spot welding frame is fixed to the rotating rod by an electric clamp, and the telescopic rod carried by the rotating disk on the base is in a vertical state. The welding wire at the end of the telescopic rod can weld the gap between the two first pipes. When the two butted pipes are the first pipe and the second pipe with different inner diameters, the first trigger rod and the second trigger rod will be pressed against the first pipe and the second pipe with different inner diameters through the second return spring. At this time, the insulating ring on the first trigger rod or the second trigger rod will separate from the two metal sheets symmetrically arranged in the through hole, allowing the circuit to be connected, which will turn on the first electromagnetic generator on the same side of the two first electromagnetic generators on the rotating rod, and then drive the mobile spot welding frame to deviate to the first pipe with larger inner diameter through magnetic attraction; at the same time, a height difference will appear between the first trigger rod and the second trigger rod, that is, the resistance between the first metal sheet and the second metal sheet will increase, thereby also triggering the electronic control device to turn on. For the second electromagnetic generator on the same side of the base, the smaller the current is, the smaller the magnetic field generated by the electronic control device is, which in turn drives the rack and the gear to engage. Then, the meshing movement causes the gear to rotate the rotating disk with a smaller amplitude. In this way, the greater the relative difference in the inner diameters of the two pipes for the snap connection, the smaller the welding wire deflection angle. At this time, the welding position is closer to the first pipe with a larger inner diameter. Therefore, during the welding process, due to the greater the relative difference in the inner diameters of the pipes, the welding point can be offset as much as possible to avoid the occurrence of welding penetration in direct spot welding. At the same time, the height difference is formed into an inclined slope through welding, so that a smooth surface appears at the joint of the pipes, and the welding of the two pipes is also completed.

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