Pipe fitting welding equipment

Abstract

The pipe fitting welding equipment comprises a base, symmetrical supporting plates are horizontally and slidably connected to the middle of the upper end of the base, a spot welding machine is slidably connected to one side of the upper end of the base, a shell is fixedly connected to the middles of the upper ends of the supporting plates, and a shell is rotatably connected to the side, close to the spot welding machine, of the shell; a clamping mechanism used for clamping and fixing a pipe fitting is arranged on the side, away from the shell, of the shell, a driving mechanism used for driving the shell to rotate is arranged on the side, away from the shell, of an inner cavity of the shell, when the driving mechanism rotates clockwise, the shell rotates clockwise along with the driving mechanism, and when the driving mechanism rotates anticlockwise, the shell is kept in a static state. Adjusting plates at different positions are pushed to move, and then racks corresponding to the adjusting plates are driven to move, so that the length of the racks making contact with a driving gear is controlled, the effect of adjusting the rotating angle of a pipe fitting is achieved, and then the number of welding spots on the outer wall of the pipe fitting is controlled when spot welding is conducted on pipe diameters of different pipe diameters.

Description

Technical Field

[0001] This invention relates to the field of pipe welding technology, specifically a pipe welding equipment. Background Technology

[0002] Spot welding is a welding method that uses a cylindrical electrode to form a weld point between the contact surfaces of two overlapping workpieces. During spot welding, pressure is first applied to bring the workpieces into close contact, then current is applied, and the contact area of ​​the workpieces melts under the action of resistance heating, and a weld point is formed after cooling.

[0003] For example, Chinese Patent Publication No. CN113020851A discloses a positioning device for continuous pipe welding, which is used to automatically locate the spot welding position of a steel pipe that has been spot welded. The device is characterized by including a left positioning moving component and a right positioning moving component. The left and right positioning moving components are respectively equipped with a transmitting module and a receiving module of a through-beam photoelectric sensor. The control unit controls the transmitting module and the receiving module to move synchronously along the axial direction of the steel pipe through the left and right positioning moving components.

[0004] In this scheme, the pipe fittings cannot rotate automatically during spot welding, which requires manual rotation of the pipe fittings to change their position in order to perform multi-point welding operations. This results in uneven distribution of the position and number of weld points during the spot welding process, thus affecting the welding effect of the pipe fittings. Summary of the Invention

[0005] The purpose of this invention is to provide a pipe welding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A pipe welding device includes a base, with symmetrical support plates horizontally slidably connected to the upper middle part of the base, a spot welding machine slidably connected to one side of the upper end of the base, a housing fixedly connected to the upper middle part of the support plates, an outer shell rotatably connected to the side of the housing near the spot welding machine, a clamping mechanism for clamping and fixing the pipe fittings provided on the side of the outer shell away from the housing, and a driving mechanism for driving the outer shell to rotate on the side of the inner cavity of the outer shell away from the housing. When the driving mechanism rotates clockwise, the outer shell rotates clockwise accordingly, and when the driving mechanism rotates counterclockwise, the outer shell remains stationary.

[0007] As a further aspect of the present invention: the clamping mechanism includes a toothed ring, which is rotatably connected to the middle of the inner cavity of the outer shell. The outer wall of the outer shell is provided with a through groove that slides with the toothed ring. A servo motor is drivenly connected to the lower middle part of the outer shell near the outer shell. The output end of the servo motor is fixedly connected to a drive gear, and the drive gear meshes with the toothed ring.

[0008] As a further embodiment of the present invention: the outer wall of the toothed ring is fixedly connected to an annular tooth on the side away from the shell, and the inner cavity of the shell is rotatably connected to a symmetrical driven gear on the side away from the shell. The driven gear meshes with the annular tooth, and a threaded rod is threadedly connected to the middle of the upper end of the driven gear. The outer wall of the threaded rod is movably connected to the shell, and the end of the threaded rod near the center of the shell passes through the shell and the driven gear and is fixedly connected to a clamping plate.

[0009] As a further aspect of the present invention: a connecting ring is fixedly connected to the inner cavity of the outer shell on the side near the shell, a ratchet is fixedly connected to the outer wall of the connecting ring on the side away from the shell, a collar is provided above the ratchet, an annular plate is fixedly connected to the collar on the side near the shell, a connecting block is fixedly connected to the upper part of the annular plate on the side near the shell, an arc-shaped groove is formed on the inner cavity sidewall of the shell on the side near the shell, the annular plate is rotatably connected to the inner cavity sidewall of the shell, and symmetrical push keys are slidably connected to the bottom of the inner cavity of the collar, the center position of the push keys corresponds to the center position of the ratchet.

[0010] As a further embodiment of the present invention: a symmetrical fixing plate is fixedly connected to the middle of the side of the collar away from the ratchet, and a plurality of adjusting plates are arranged between the symmetrical fixing plates. The symmetrical fixing plates are located on the upper and lower sides of the outer wall of the collar. The side of the adjusting plate near the ratchet is horizontally slidably connected to the outer wall of the collar. A symmetrical positioning rod is vertically slidably connected to the middle of the side of the adjusting plate near the collar. The outer wall of the collar is provided with a sliding groove that slides with the positioning rod. Positioning grooves are provided at both ends of the sliding groove.

[0011] As a further embodiment of the present invention: a push plate is fixedly connected to the middle of the side of the adjusting plate away from the annular plate; an adapter groove is provided on the side wall of the housing away from the outer shell; the outer wall of the push plate slides in conjunction with the inner cavity of the adapter groove; and racks are fixedly connected to the outer walls of both the fixing plate and the adjusting plate away from the collar.

[0012] As a further aspect of the present invention: the driving mechanism includes a driving motor, which is connected to the upper middle part of the housing near the outer shell. A sleeve is slidably connected to the outer wall of the output end of the driving motor. A driving gear is fixedly connected to the outer wall of the sleeve away from the driving motor. The driving gear meshes with the rack.

[0013] As a further aspect of the present invention: symmetrical support rods are rotatably connected to the outer wall of the housing near the drive motor, and a driven rod is fixedly connected to the side of the support rod away from the housing. A T-shaped groove is provided at the top of the upper end of the housing. The outer wall of the driven rod fits into the T-shaped groove. The drive gear slides into the T-shaped groove. A fixing block is fitted together on the outer walls of the symmetrical support rods. The two side walls of the fixing block are fixedly connected to the side walls of the T-shaped groove.

[0014] As a further embodiment of the present invention: the upper end of the fixed block is provided with a symmetrical moving groove, the lower outer wall of the driven rod is slidably connected to the moving groove, and the lower end of the symmetrical support rod is fixedly connected with an adjusting block, the lower end of the adjusting block is in contact with the outer wall of the collar.

[0015] As a further embodiment of the present invention: a guide plate is fixedly connected to the side of the adjusting plate near the adjusting block; a reset plate is fixedly connected to the side of the upper fixed plate near the drive motor; and a guide plate is fixedly connected to the side of the lower fixed plate near the drive motor. The positions of the lower guide plate and the reset plate are corresponding.

[0016] Compared with the prior art, the beneficial effects of the present invention are: As the ring gear rotates counterclockwise with the toothed ring, the end of the threaded rod near the center of the shell passes through the outer shell and is fixedly connected to the clamping plate by the driven gear. As the clamping plate approaches the pipe fitting with the threaded rod and clamps and fixes it, pushing the push plate at different positions can push the adjustment plate at different positions to move, thereby driving the corresponding rack to move. This controls the length of the rack in contact with the drive gear, thereby achieving the effect of adjusting the rotation angle of the pipe fitting, and thus controlling the number of weld points on the outer wall of the pipe fitting when spot welding pipes of different diameters. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the clamping mechanism in this invention.

[0019] Figure 3 This is a schematic diagram of the driven gear in this invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the shell in this invention.

[0021] Figure 5 This is a schematic diagram of the ratchet structure in this invention.

[0022] Figure 6 For the present invention Figure 5 A schematic diagram of the structure of area A in the middle.

[0023] Figure 7 This is a schematic diagram of the collar structure in this invention.

[0024] Figure 8 This is a schematic diagram of the structure of the fixing plate in this invention.

[0025] Figure 9 This is a schematic diagram of the slide groove in this invention.

[0026] Figure 10 This is a schematic diagram of the drive mechanism of the present invention.

[0027] Figure 11 This is a schematic diagram of the structure of the adjusting block in this invention.

[0028] Figure 12 This is a schematic diagram of the connecting block in this invention.

[0029] In the diagram: 1. Base; 2. Support plate; 3. Spot welding machine; 4. Housing; 5. Outer shell; 6. Threaded rod; 7. Clamping plate; 8. Gear ring; 9. Drive gear; 10. Servo motor; 11. Ring gear; 12. Driven gear; 13. Push plate; 14. Connecting ring; 15. Ratchet; 16. Collar; 17. Fixing plate; 18. Adjusting plate; 19. Rack; 20. Guide plate; 21. Reset plate; 22. Slide groove; 23. Ring plate; 24. Positioning rod; 25. Positioning groove; 26. Drive motor; 27. Drive gear; 28. Outer shell; 29. ​​Support rod; 30. Driven rod; 31. Fixing block; 32. Adjusting block; 33. Moving groove; 34. Connecting block; 35. Arc groove; 36. Adaptor groove; 37. Push key. Detailed Implementation

[0030] Please see Figure 1In this embodiment of the invention, a pipe welding device includes a base 1. Symmetrical support plates 2 are horizontally slidably connected to the upper middle part of the base 1. A spot welding machine 3 (a mechanical device employing the principle of double-sided, double-point overcurrent welding, where two electrodes press the workpiece during operation, causing two layers of metal to form a certain contact resistance under the pressure of the two electrodes, and the welding current flowing from one electrode to the other forms an instantaneous heat fusion at the two contact resistance points; this is a commonly used technique in the prior art) is driven by an electric push rod in the middle of the inner cavity of the base 1. The output end of the electric push rod is connected to the support plates respectively. The support plate 2 and the spot welding machine 3 are fixedly connected to the lower side, so that the symmetrical support plate 2 and the spot welding machine 3 can be moved horizontally by the electric push rod, thereby adapting to pipes of different lengths and widths. The upper middle part of the support plate 2 is fixedly connected to the housing 4. The housing 4 is rotatably connected to the outer shell 5 on the side of the housing 4 close to the spot welding machine 3. The side of the outer shell 5 away from the housing 4 is provided with a clamping mechanism for clamping and fixing the pipe. The inner cavity of the outer shell 5 is provided with a driving mechanism for driving the outer shell 5 to rotate on the side away from the housing 4. When the driving mechanism rotates clockwise, the outer shell 5 rotates clockwise accordingly. When the driving mechanism rotates counterclockwise, the outer shell 5 remains stationary.

[0031] Please see Figures 2-3 The clamping mechanism includes a gear ring 8, which is rotatably connected to the center of the inner cavity of the housing 5. The outer wall of the housing 5 has a through groove for sliding the gear ring 8. A servo motor 10 is connected to the lower center of the housing 5 near the housing 5. A drive gear 9 is fixedly connected to the output end of the servo motor 10. The drive gear 9 meshes with the gear ring 8. When the servo motor 10 drives the drive gear 9 to rotate clockwise, the drive gear 9 drives the gear ring 8 to rotate counterclockwise along the through groove. A ring tooth 11 is fixedly connected to the outer wall of the gear ring 8 away from the housing 4. Symmetrical driven gears 12 are rotatably connected to the inner cavity of the housing 5 away from the housing 4. The driven gears 12 mesh with the ring teeth 11. As the ring teeth 11 rotate counterclockwise with the gear ring 8, they drive the driven gears 12. When rotated counterclockwise, the driven gear 12 has a threaded rod 6 threadedly connected to the upper middle part. The outer wall of the threaded rod 6 is movably connected to the outer shell 5. That is, as the driven gear 12 rotates counterclockwise with the ring gear 11, the driven gear 12 will drive the threaded rod 6 to move vertically downward. The end of the threaded rod 6 near the center of the shell 4 passes through the outer shell 5 and is fixedly connected to the clamping plate 7. As the clamping plate 7 moves downward with the threaded rod 6, it can clamp and fix the pipe. When the servo motor 10 drives the drive gear 9 to rotate counterclockwise, the drive gear 9 drives the gear ring 8 to rotate clockwise, thereby driving the ring gear 11 to rotate clockwise. Then, the clockwise rotation of the driven gear 12 drives the threaded rod 6 to move the clamping plate 7 away from the center of the shell 4, thereby releasing the fixation of the pipe.

[0032] Please see Figures 4-6A connecting ring 14 is fixedly connected to the inner cavity of the outer shell 5 near the side of the outer shell 4. A ratchet 15 is fixedly connected to the outer wall of the connecting ring 14 away from the outer shell 5. A collar 16 is provided above the ratchet 15. An annular plate 23 is fixedly connected to the side of the collar 16 near the outer shell 5. The annular plate 23 is rotatably connected to the inner cavity sidewall of the outer shell 4. Symmetrical push keys 37 are slidably connected to the bottom of the inner cavity of the collar 16. The center position of the push key 37 corresponds to the center position of the ratchet 15. The end of the push key 37 away from the ratchet 15 is elastically connected to the top of the inner cavity of the collar 16 by a spring. During the clockwise rotation of the collar 16, the lower sidewall of the push key 37 contacts the teeth of the ratchet 15 and pushes the ratchet 15 clockwise. The ratchet 15 rotates, causing the connecting ring 14 to rotate clockwise synchronously. The connecting ring 14 is fixedly connected to the outer shell 5. As the ratchet 15 is pushed clockwise by the push key 37, the outer shell 5 will rotate clockwise synchronously through the connecting ring 14. Since the threaded rod 6 and the clamping plate 7 clamp and fix the pipe, the outer shell 5 will rotate clockwise synchronously through the clamping action of the threaded rod 6 and the clamping plate 7 as the connecting ring 14 rotates. When spot welding is performed on a local part of the pipe, rotating the pipe allows the spot welding machine 3 to perform continuous spot welding on the local part of the pipe, thereby quickly spot welding the pipe. Spot welding can quickly weld two pipes together.

[0033] Please see Figures 7-9 A symmetrical fixing plate 17 is fixedly connected to the middle of the side of the collar 16 away from the ratchet 15. Several adjusting plates 18 are arranged between the symmetrical fixing plates 17. The symmetrical fixing plates 17 are located on the upper and lower sides of the outer wall of the collar 16. The side of the adjusting plate 18 near the ratchet 15 is horizontally slidably connected to the outer wall of the collar 16. A symmetrical positioning rod 24 is vertically slidably connected to the middle of the side of the adjusting plate 18 near the collar 16. The top of the positioning rod 24 is elastically connected to the top of the inner cavity of the adjusting plate 18 by a spring. The outer wall of the collar 16 has a sliding groove 22 that slides with the positioning rod 24. Both ends of the sliding groove 22 have positioning grooves 25. When the positioning rod 24 is located in the inner cavity of the positioning groove 25, the positioning rod 24 will slide with the positioning rod 24. The snap-fit ​​of the positioning groove 25 causes the collar 16 to rotate synchronously with the adjusting plate 18. When the positioning rod 24 is located in the inner cavity of the positioning groove 25 away from the annular plate 23, the side wall of the adjusting plate 18 is in contact with the side wall of the fixed plate 17. That is, the center positions of the fixed plate 17 and the adjusting plate 18 are in the same vertical plane. A push plate 13 is fixedly connected to the middle of the side of the adjusting plate 18 away from the annular plate 23. An adapter groove 36 is opened on the side wall of the housing 4 away from the outer shell 5. The outer wall of the push plate 13 slides in contact with the inner cavity of the adapter groove 36. That is, when the push plate 13 rotates with the adjusting plate 18, the outer wall of the push plate 13 slides in contact with the inner cavity side wall of the adapter groove 36 and moves along the inner cavity side wall of the adapter groove 36.

[0034] When the push plate 13 is moved toward the location of the outer casing 5, the push plate 13 will push the adjusting plate 18 to move horizontally toward the location of the outer casing 5. This causes the positioning rod 24 to move toward the top of the inner cavity of the adjusting plate 18, and then disengage from the inner cavity of the positioning groove 25 away from the annular plate 23 and move along the slide groove 22 until the positioning rod 24 moves close to the inner cavity of the positioning groove 25 of the annular plate 23. At this time, the positioning rod 24 pops out from the inner cavity of the adjusting plate 18 and elastically engages with the positioning groove 25 near the annular plate 23, thereby limiting and fixing the position of the adjusting plate 18. Both the fixed plate 17 and the adjusting plate 18 have racks 19 fixedly connected to their outer walls on the side away from the collar 16. When the positioning rod 24 is located in the positioning groove 25 on the side away from the annular plate 23, the adjusting plate 18 and the fixed plate 17 are located in the same vertical plane, and the side walls of the multiple racks 19 fit together to form a semi-circular rack. When the positioning rod 24 is located in the positioning groove 25 on the side close to the annular plate 23, the adjusting plate 18 and the fixed plate 17 are separated, so that the multiple racks 19 are no longer located in the same vertical plane, and a gap is created between the multiple racks 19.

[0035] Please see Figure 10 and Figure 12The drive mechanism includes a drive motor 26, which is connected to the upper middle part of the housing 4 near the outer shell 5. A sleeve 28 is slidably connected to the outer wall of the output end of the drive motor 26. A drive gear 27 is fixedly connected to the outer wall of the sleeve 28 away from the drive motor 26. The drive gear 27 meshes with a rack 19. In the initial state, the end of the upper fixed plate 17 away from the adjusting plate 18 is directly below the drive gear 27. At this time, the drive motor 26 drives the sleeve 28 to rotate, which in turn drives the rack 19 to move via the drive gear 27. The rack 19 drives the fixed plate 17, which in turn drives the collar 16 to rotate, thereby driving the pipe fitting to rotate. This is to cooperate with the spot welding machine 3 to achieve continuous spot welding. If the adjusting plate 18 and the fixed plate 17 are located in the same vertical plane, the drive gear 27 will continuously contact multiple racks 19 until the collar 16 rotates 180°. The outer wall of the housing 28 near the drive motor 26 is rotatably connected to symmetrical support rods 29. The side of the support rods 29 away from the housing 28 is fixedly connected to a driven rod 30. The housing 4 A T-slot is provided at the top of the upper part. The outer wall of the driven rod 30 fits into the T-slot. The drive gear 27 slides into the T-slot. The outer walls of the symmetrical support rods 29 are fitted with a fixing block 31. The two side walls of the fixing block 31 are fixedly connected to the side walls of the T-slot. A symmetrical moving groove 33 is provided at the upper end of the fixing block 31. The lower outer wall of the driven rod 30 slides into the moving groove 33. An adjusting block 32 is fixedly connected to the lower end of the symmetrical support rods 29. The lower end of the adjusting block 32 fits into the outer wall of the collar 16. The adjusting block 32 is a parallelogram with inclined surfaces on both sides. When the adjusting block 32 is subjected to a horizontal force, it will drive the driven rod 30 to move horizontally along the moving groove 33, thereby driving the housing 28 and the drive gear 27 to move horizontally. This causes the drive gear 27 to separate from the rack 19 and no longer drive the collar 16 to rotate. A connecting block 34 is fixedly connected to the upper part of the plate 23 near the outer shell 5. An arc-shaped groove 35 is opened on the inner cavity sidewall of the shell 4 near the outer shell 5. The connecting block 34 is slidably connected in the arc-shaped groove 35. The sidewall of the connecting block 34 and the lower sidewall of the arc-shaped groove 35 are elastically connected by a spring. When the drive gear 27 separates from the rack 19, the connecting block 34 is pushed upward along the arc-shaped groove 35 under the action of the elastic force, thereby driving the annular plate 23 and the collar 16 to rotate counterclockwise, so that the collar 16 returns to the initial position. During the rotation and reset of the collar 16, when the lower end of the push key 37 contacts the teeth of the ratchet 15, the push key 37 is pushed up and moves towards the top of the inner cavity of the collar 16 without driving the ratchet 15 to rotate counterclockwise. That is, during the reset of the collar 16, the ratchet 15 remains stationary, thereby keeping the pipe in a stationary state.

[0036] Please see Figure 8 and Figure 11A guide plate 20 is fixedly connected to the side of the adjusting plate 18 near the adjusting block 32. A reset plate 21 is fixedly connected to the side of the upper fixed plate 17 near the drive motor 26, and a guide plate 20 is fixedly connected to the side of the lower fixed plate 17 near the drive motor 26. When the adjusting plate 18 and the fixed plate 17 are tightly fitted, the vertical plane of the side wall of the guide plate 20 near the drive motor 26 coincides with the vertical plane of the side wall of the fixed plate 17 near the drive motor 26. Therefore, when the drive gear 27 rotates the drive collar 16, the guide plate 20 will not contact the adjusting block 32. When the lower fixed plate 17 rotates to the bottom of the housing 28, the inclined side of the guide plate 20 connected to it will... The adjusting block 32 contacts the side of the drive motor 26, thereby pushing the adjusting block 32 to drive the driven rod 30 to move horizontally, which in turn drives the sleeve 28 and the drive gear 27 to move horizontally and separate from the rack 19. During the reset process of the collar 16, the reset plate 21 moves closer to the position of the adjusting block 32 along with the fixing plate 17 and contacts the side of the adjusting block 32 away from the drive motor 26, thereby pushing the adjusting block 32 to reset, which in turn drives the drive gear 27 to reset and drive the rack 19 to rotate again. The outer wall of the driven rod 30 is elastically connected with symmetrical protrusions, and the inner cavity of the moving groove 33 is provided with a groove for cooperating with the protrusions. When the driven rod 30 moves along the moving groove 33, the protrusions and grooves cooperate to elastically limit the position of the drive gear 27.

[0037] The number of weld points required for spot welding varies depending on the pipe diameter. Smaller diameter pipes require fewer weld points for stable welding than larger diameter pipes. Therefore, if the rotation angle of the collar 16 cannot be adjusted, it will require repeated unfixing and manual adjustment of the large-diameter pipe's position during spot welding. To address this, the push plate 13 is used to adjust the positions of the adjusting plate 18 and the fixing plate 17, thereby creating an intermittent effect on the rack 19. This controls the angle at which the drive gear 27 drives the rack 19 to rotate, thereby rotating the collar 16. Specifically, the position of the adjusting plate 18 is moved to change the length of the rack 19 in contact with the drive gear 27, thus controlling the angle of rotation of the pipe fitting in a single operation. This adapts to the number of weld points required for pipe fittings of different diameters. For smaller diameter fittings, increasing the length of the rack 19 in contact with the drive gear 27 increases the angle of rotation in a single operation, reducing the number of weld points. For larger diameter fittings, decreasing the length of the rack 19 in contact with the drive gear 27 reduces the angle of rotation in a single operation. The angle decreases to increase the number of weld points. When the adjusting plate 18 separates from the fixed plate 17, the side wall of the guide plate 20 connected to the adjusting plate 18 near the drive motor 26 will fit against the annular plate 23. When the separated adjusting plate 18 moves below the housing 28, the inclined side of the separated guide plate 20 will contact the side of the adjusting block 32 near the drive motor 26. As the rack 19 is continuously driven by the drive gear 27, the guide plate 20 will push the adjusting block 32 to move the driven rod 30 away from the position of the drive motor 26, thereby driving the drive gear. After the wheel 27 separates from the rack 19 and the fixed plate 17 connected to the reset plate 21 is reset, the reset plate 21 drives the drive gear 27 to reset and drives the rack 19 to rotate the collar 16, thereby enabling the pipe to achieve unidirectional reciprocating rotation. The rotation angle can be adjusted more freely according to needs. That is, by pushing the push plate 13 at different positions, the adjustment plate 18 at different positions can be moved, thereby driving the corresponding rack 19 to move, thereby controlling the length of the rack 19 in contact with the drive gear 27, thereby achieving the effect of adjusting the rotation angle of the pipe.

Claims

1. A pipe fitting welding device, comprising a base, characterized in that, A symmetrical support plate is slidably connected to the upper middle part of the base. A spot welding machine is slidably connected to one side of the upper end of the base. A housing is fixedly connected to the upper middle part of the support plate. An outer shell is rotatably connected to the side of the housing near the spot welding machine. A clamping mechanism for clamping and fixing pipe fittings is provided on the side of the outer shell away from the housing. A driving mechanism for driving the outer shell to rotate is provided on the side of the inner cavity of the outer shell away from the housing. When the driving mechanism rotates clockwise, the outer shell rotates clockwise accordingly. When the driving mechanism rotates counterclockwise, the outer shell remains stationary.

2. The pipe fitting welding equipment according to claim 1, characterized in that, The clamping mechanism includes a toothed ring, which is rotatably connected to the middle of the inner cavity of the housing. The outer wall of the housing has a through groove that slides with the toothed ring. A servo motor is drivenly connected to the lower middle part of the housing near the housing. The output end of the servo motor is fixedly connected to a drive gear, which meshes with the toothed ring.

3. The pipe fitting welding equipment according to claim 2, characterized in that, The outer wall of the gear ring is fixedly connected to an annular tooth on the side away from the shell. The inner cavity of the shell is rotatably connected to a symmetrical driven gear on the side away from the shell. The driven gear meshes with the annular tooth. A threaded rod is threadedly connected to the middle of the upper end of the driven gear. The outer wall of the threaded rod is movably connected to the shell. The end of the threaded rod near the center of the shell passes through the shell and the driven gear and is fixedly connected to a clamping plate.

4. The pipe fitting welding equipment according to claim 2, characterized in that, A connecting ring is fixedly connected to the inner cavity of the outer shell on the side near the shell. A ratchet is fixedly connected to the outer wall of the connecting ring on the side away from the shell. A collar is provided above the ratchet. An annular plate is fixedly connected to the collar on the side near the shell. A connecting block is fixedly connected to the upper part of the annular plate on the side near the shell. An arc-shaped groove is formed on the inner cavity sidewall of the shell on the side near the shell. The annular plate is rotatably connected to the inner cavity sidewall of the shell. A symmetrical push key is slidably connected to the bottom of the inner cavity of the collar. The center position of the push key corresponds to the center position of the ratchet.

5. The pipe fitting welding equipment according to claim 4, characterized in that, A symmetrical fixing plate is fixedly connected to the middle of the side of the collar away from the ratchet. Several adjusting plates are arranged between the symmetrical fixing plates. The symmetrical fixing plates are located on the upper and lower sides of the outer wall of the collar. The side of the adjusting plate near the ratchet is horizontally slidably connected to the outer wall of the collar. A symmetrical positioning rod is vertically slidably connected to the middle of the side of the adjusting plate near the collar. The outer wall of the collar has a sliding groove that slides with the positioning rod. Positioning grooves are formed at both ends of the sliding groove.

6. The pipe fitting welding equipment according to claim 5, characterized in that, A push plate is fixedly connected to the middle of the side of the adjusting plate away from the annular plate. An adapter groove is provided on the side wall of the housing away from the outer shell. The outer wall of the push plate slides in conjunction with the inner cavity of the adapter groove. A rack is fixedly connected to the outer wall of both the fixing plate and the adjusting plate away from the collar.

7. The pipe fitting welding equipment according to claim 4, characterized in that, The driving mechanism includes a drive motor, which is connected to the upper middle part of the housing near the outer shell. The output end of the drive motor is slidably connected to a sleeve, and a drive gear is fixedly connected to the outer wall of the sleeve away from the drive motor. The drive gear meshes with a rack.

8. The pipe fitting welding equipment according to claim 7, characterized in that, The outer wall of the housing near the drive motor is rotatably connected to symmetrical support rods. A driven rod is fixedly connected to the side of the support rod away from the housing. A T-slot is provided at the top of the upper end of the housing. The outer wall of the driven rod fits into the T-slot. The drive gear slides into the T-slot. A fixing block is fitted on the outer wall of the symmetrical support rods. The two side walls of the fixing block are fixedly connected to the side walls of the T-slot.

9. The pipe fitting welding equipment according to claim 8, characterized in that, The upper end of the fixed block is provided with symmetrical moving grooves, and the lower outer wall of the driven rod is slidably connected to the moving groove. The lower end of the symmetrical support rod is fixedly connected with an adjusting block, and the lower end of the adjusting block is in contact with the outer wall of the collar.

10. A pipe fitting welding equipment according to claim 6, characterized in that, A guide plate is fixedly connected to the side of the adjusting plate near the adjusting block. A reset plate is fixedly connected to the side of the upper fixed plate near the drive motor. A guide plate is fixedly connected to the side of the lower fixed plate near the drive motor. The lower guide plate and the reset plate are positioned opposite each other.

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