Device and method for welding large-diameter pipe body

Abstract

The invention provides a device for welding a large-diameter pipe body, and relates to the technical field of pipeline welding, the device comprises a machine table, large pipe fixing mechanisms and a polishing and welding mechanism are arranged on the machine table, and the polishing and welding mechanism is arranged between the two large pipe fixing mechanisms; the grinding and welding mechanism comprises a grinding and welding driving mechanism, a multidirectional grinding disc attaching mechanism, a welding mechanism and a welding mechanism reciprocating type pushing mechanism; the grinding and welding driving mechanism is fixedly connected to the machine table, the multi-direction grinding disc attaching mechanism is connected to the grinding and welding driving mechanism, the welding mechanism is arranged on the grinding and welding driving mechanism, and the welding mechanism reciprocating type pushing mechanism is arranged on the machine table and rotationally connected with the multi-direction grinding disc attaching mechanism. Occupied space is reduced, grinding and welding are driven by one driving mechanism, and resource waste is reduced; a plurality of grinding discs are used for grinding, so that the efficiency is improved; and the welding head is annularly rotated, so that the possibility of dislocation caused by rotation of the pipe body is reduced, and the welding effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and in particular to a device and method for welding a large-diameter pipe body. Background Art

[0002] The transmission of oil, natural gas, water resources, etc. all require pipelines as the transmission medium, but this type of transmission often has high requirements on the sealing and length of the pipeline to ensure its sealing performance. At present, the welding between pipes is more and more widely used. In the process of connecting metal pipes, they need to be butt welded.

[0003] The existing large-diameter pipe welding device needs to grind the welding part during welding to ensure the welding effect. However, welding and grinding are divided into two machine tools, which increases the floor space. During the grinding process, the surfaces of both ends of the pipe connection are ground by a single grinding disc, which affects the grinding efficiency. Furthermore, during welding, the two pipe bodies are usually rotated and the joint is welded by the welding head. However, when the pipe bodies rotate, vibration dislocation is likely to occur, and the vibration dislocation of the two pipe bodies is likely to affect the connection effect of the weld. Finally, the welding head needs to rotate and reciprocate during welding. These two motion forms require separate drive control, which increases the cost. In view of the above problems, we propose a device and method for welding large diameter pipes. Summary of the invention

[0004] In view of the problems in the above-mentioned prior art that the welding and grinding devices are divided into two machine tools, resulting in a large occupied area, and the single grinding disc is inefficient, and the rotation of the pipe body causes vibration and dislocation, which affects the welding effect, we propose a device and method for welding large diameter pipes.

[0005] The present invention provides a device for welding a large-diameter pipe body, comprising a machine platform, on which a large-pipe fixing mechanism and a grinding and welding mechanism are arranged, wherein two groups of large-pipe fixing structures are arranged symmetrically on the machine platform, and the grinding and welding mechanism is arranged between the two groups of large-pipe fixing mechanisms, and the grinding and welding mechanism comprises a grinding and welding driving mechanism, a multi-directional grinding disc laminating mechanism, a welding mechanism, and a welding mechanism reciprocating driving mechanism; The grinding and welding driving mechanism is fixedly connected to the machine platform, the multi-directional grinding disc bonding mechanism is connected to the grinding and welding driving mechanism, the welding mechanism is arranged on the grinding and welding driving mechanism, and the welding mechanism reciprocating driving mechanism is arranged on the machine platform and is rotationally connected to the multi-directional grinding disc bonding mechanism.

[0006] According to a further improved solution of the present invention, the grinding and welding driving mechanism comprises a support seat, a rotating ring, and a gear mechanism, wherein the support seat is fixedly connected to the machine platform, the rotating ring passes through the support seat and is rotatably connected to the support seat, and one end of the gear mechanism is arranged on the machine platform, and the other end is arranged on the rotating ring; The gear mechanism includes a driving motor 1, a gear 1, and a gear ring 1. A placement groove is provided on the machine platform. The driving motor 1 is arranged in the placement groove and is fixedly connected to the machine platform. The gear is coaxially fixedly connected to the output end of the driving motor 1. The gear ring 1 is fixedly sleeved on the surface of the rotating ring and meshes with the gear 1.

[0007] A further improvement of the present invention, the multi-directional grinding disc fitting mechanism comprises a collar plate, a second gear ring, a second gear, a second drive motor, and a grinding adjustment mechanism, the collar plate is fixedly connected to the end of the rotating ring, the second gear ring is rotatably connected to the end of the collar plate away from the rotating ring, the second gear is meshed with the second gear ring, the second drive motor is fixedly connected to the collar plate, the second gear is connected to the output end of the second drive motor, and the grinding adjustment mechanism is connected to the collar plate and the second gear ring; The grinding adjustment mechanism has four groups of surrounding arrays based on the center position of the ring plate. The grinding adjustment mechanism includes an arc-shaped grinding disc, an adjustment plate, an adjustment rod, and an arc-shaped groove. The arc-shaped grinding disc is arranged in the ring plate and fits the surface of the tube body. The adjustment plate is fixedly connected to the arc-shaped grinding disc and movably passes through the ring plate. The adjustment rod is fixedly connected to the adjustment plate. The arc-shaped groove is arranged on the gear ring. The end of the adjustment rod away from the adjustment plate is arranged in the arc-shaped groove and moves in the arc-shaped groove.

[0008] A further improvement scheme of the present invention is that the welding mechanism includes a supporting vertical plate, a supporting horizontal plate, and a welding head. The supporting vertical plate is fixedly connected to the surface of the rotating ring, the supporting horizontal plate movably passes through the supporting vertical plate, the welding head is fixedly connected to the supporting horizontal plate, the rotating ring is provided with a through groove, the end of the welding head away from the supporting horizontal plate is arranged in the through groove, and is arranged between the two tube bodies.

[0009] A further improvement of the present invention is that the reciprocating push mechanism of the welding mechanism includes a support seat mechanism and an adjustment head mechanism, wherein the support seat mechanism is fixedly connected to the machine platform and is rotatably connected to the second gear ring, and the adjustment head mechanism is annularly slidably arranged on the support seat mechanism; The support seat mechanism includes a support seat 2, a ring plate, and an annular guide plate. The support seat 2 is fixedly connected to the machine platform, the ring plate is fixedly connected to the support seat 2 and is rotatably connected to the gear ring 2, and the annular guide plate is fixedly sleeved on the ring plate.

[0010] A further improvement scheme of the present invention is that the adjusting head mechanism includes an arc block, an adjusting head, and a connecting rod. The arc block is annularly slidably arranged on the annular guide plate through a sliding mechanism. The arc block is provided with a through groove. The adjusting head is arranged in the through groove and is slidingly connected to the arc block through a second sliding mechanism. The connecting rod is fixed through the adjusting head, and its upper end is connected to the supporting cross plate. The annular guide plate is provided with an arc-shaped corrugated groove, and the lower end of the connecting rod is arranged in the arc-shaped corrugated groove.

[0011] A further improvement scheme of the present invention is that the large tube fixing structure includes a support seat body, a semi-annular groove, an arc-shaped clamping plate, and a power mechanism. The support seat body is fixedly connected to the machine platform. The semi-annular grooves are provided with two, which are symmetrically arranged on the support seat body. The arc-shaped clamping plate is provided with two groups, which are respectively arranged in two semi-annular grooves and are annularly slidably connected to the support seat body. The power mechanism is engaged with the arc-shaped clamping plate and is fixedly connected to the support seat body.

[0012] A further improvement scheme of the present invention is that the power mechanism includes a driving motor three, a gear three, a bevel gear mechanism, and a gear four. The driving motor three is fixedly connected to the support seat body, and the support seat body is provided with a placement groove which is communicated with the semi-annular groove, and the placement grooves are symmetrically distributed with respect to the center position of the support seat body. The gear three, the gear four, and the bevel gear mechanism are arranged in the placement groove, and the gear three is fixedly connected to the output end of the driving motor three through a connecting shaft, and the gear three is meshed with one of the arc-shaped clamping plates. The bevel gear mechanism is rotatably connected to the support seat body, and its two ends are respectively fixedly connected to the gear three and the gear four, and the bevel gear four is rotatably connected to the support seat body.

[0013] A further improvement scheme of the present invention, the bevel gear mechanism includes bevel gear one, bevel gear two, and bevel gear three, the bevel gears are coaxially fixedly connected to the surface of the connecting shaft, the bevel gear two is rotatably connected to the support seat body and meshes with bevel gear one, the bevel gear three meshes with bevel gear two, and is coaxially fixedly connected to gear four.

[0014] A further improved solution of the present invention is a method for welding a large diameter pipe body, comprising the following steps: Step 1: Start the drive motor 3, drive the gear 3 to rotate, drive the gear 4 to rotate through the bevel gear mechanism, drive the two arc-shaped clamping plates to rotate 90 degrees in opposite directions through the oppositely rotating gears 3 and 4, and fix the large pipe through the two arc-shaped clamping plates; Step 2: Start the second drive motor, drive the second gear to rotate, drive the second gear ring to rotate, so that the adjustment rod is displaced in the arc groove, so that the adjustment plate and the arc grinding disc move toward the center position of the ring plate, and the four arc grinding discs are pressed against the surfaces of the two large pipes; Step 3: Start the drive motor, drive the gear 1 to rotate, drive the gear ring 1 to rotate, drive the rotating ring to rotate, drive the ring plate and the gear ring 2 to rotate, drive the four arc-shaped grinding discs to rotate, and grind the two ends of the surface of the large pipe welding part through the four arc-shaped grinding discs; Step 4: When the driving motor is started, the gear is driven to rotate, thereby driving the gear ring to rotate, thereby driving the rotating ring to rotate, thereby driving the supporting vertical plate to rotate, driving the supporting horizontal plate and the welding head to rotate, and welding the two large pipes at the joint. Under the action of the arc-shaped corrugated groove, the connecting rod moves back and forth, thereby causing the supporting horizontal plate and the welding head to move back and forth to ensure the welding effect.

[0015] Beneficial effects of the present invention: The present invention provides a device and method for welding a large diameter pipe: 1. By placing the grinding and welding devices on one machine, the occupied space is reduced, and the grinding and welding are driven by one driving mechanism, which reduces the waste of resources; 2. Grinding the weld surface of the pipe body at both ends through multiple grinding discs to improve efficiency; 3. By rotating the welding joint in a circular manner, the pipe body joint is welded, which reduces the possibility of misalignment caused by the rotation of the pipe body and ensures the connection effect; 4. A driving motor is used to drive the welding head to rotate and translate, thus reducing the waste of costs and resources; Fourth, the power mechanism in the large tube fixing mechanism enables the two arc-shaped clamping plates to rotate to the left and right sides respectively, thereby fixing the large tube. Compared with the method of fixing the large tube by screwing bolts and clamping rings in the prior art, the efficiency of fixing the large tube is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural diagram of a device and method for welding a large diameter pipe.

[0017] Figure 2 The present invention is a structural diagram of a grinding welding mechanism of a device and method for welding a large diameter pipe.

[0018] Figure 3 The present invention is a structural diagram of a grinding welding drive mechanism and a gear mechanism of a device and method for welding a large-diameter pipe.

[0019] Figure 4 The present invention is a structural diagram of a multi-directional grinding disc bonding mechanism of a device and method for welding a large diameter pipe.

[0020] Figure 5The present invention is a structural diagram of a grinding adjustment mechanism of a device and method for welding a large-diameter pipe.

[0021] Figure 6 The present invention is a structural diagram of a welding mechanism of a device and method for welding a large diameter pipe.

[0022] Figure 7 The present invention is a structural diagram of a reciprocating push mechanism of a welding mechanism of a device and method for welding a large diameter pipe.

[0023] Figure 8 The present invention is a structural diagram of an adjustment head mechanism of a device and method for welding a large diameter pipe.

[0024] Fig. 9 The present invention is a structural diagram of a large-pipe fixing structure of a device and method for welding a large-diameter pipe body.

[0025] Fig.10 The exploded view of the large pipe fixing structure of the device and method for welding large diameter pipe bodies of the present invention.

[0026] Fig.11 The present invention is a structural diagram of a bevel gear mechanism of a device and method for welding a large diameter pipe.

[0027] In the attached drawings: 1. Machine; 2. Large pipe fixing structure; 3. Grinding and welding mechanism; 4. Grinding and welding driving mechanism; 5. Multi-directional grinding disc laminating mechanism; 6. Welding mechanism; 7. Welding mechanism reciprocating pushing mechanism; 8. Support seat; 9. Rotating ring; 10. Gear mechanism; 11. Driving motor 1; 12. Gear 1; 13. Gear ring 1; 14. Ring plate; 15. Gear ring 2; 16. Gear 2; 17. Grinding adjustment mechanism; 18. Arc grinding disc; 19. Adjustment plate; 20. Adjustment rod; 21. Arc groove; 22. Support vertical plate; 23. Support horizontal plate ; 24. Welding head; 25. Through groove; 26. Support seat mechanism; 27. Adjustment head mechanism; 28. Support seat two; 29. ​​Ring plate; 30. Annular guide plate; 31. Arc block; 32. Adjustment head; 33. Connecting rod; 34. Arc corrugated groove; 35. Support seat body; 36. Semi-annular groove; 37. Arc clamping plate; 38. Power mechanism; 39. Drive motor three; 40. Gear three; 41. Bevel gear mechanism; 42. Gear four; 43. Bevel gear one; 44. Bevel gear two; 45. Bevel gear three; 46. Placement groove; 47. Drive motor two. DETAILED DESCRIPTION

[0028] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0029] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] according to Figure 1 , Figure 2 A device for welding a large-diameter pipe body is shown, comprising a machine platform 1, on which a large-pipe fixing mechanism 2 and a grinding and welding mechanism 3 are provided. The large-pipe fixing structure 2 is provided with two groups, which are symmetrically arranged on the machine platform 1 to fix the large pipe. The grinding and welding mechanism 3 is arranged between the two groups of large-pipe fixing mechanisms 2. The grinding and welding mechanism 3 comprises a grinding and welding driving mechanism 4, a multi-directional grinding disc laminating mechanism 5, a welding mechanism 6, and a welding mechanism reciprocating pushing mechanism 7. When the grinding and welding driving mechanism 4 is started, the multi-directional grinding disc laminating mechanism 5 and the welding mechanism 6 are driven to rotate, and the large pipe is grinded and welded respectively by the multi-directional grinding disc laminating mechanism 5 and the welding mechanism 6. The welding mechanism reciprocating pushing mechanism 7 pushes the welding mechanism 6 to reciprocate when it rotates. according to Figure 1 , 2 The grinding and welding driving mechanism 4 is fixedly connected to the machine platform 1, the multi-directional grinding disc bonding mechanism 5 is connected to the grinding and welding driving mechanism 4, the welding mechanism 6 is arranged on the grinding and welding driving mechanism 4, and the welding mechanism reciprocating driving mechanism 7 is arranged on the machine platform 1 and is rotationally connected to the multi-directional grinding disc bonding mechanism 5.

[0032] The present invention is based on Figure 1 , Figure 2 , Figure 3The grinding and welding driving mechanism 4 includes a support seat 8, a rotating ring 9, and a gear mechanism 10. The support seat 8 is fixedly connected to the machine platform 1 to support the rotating ring 9. The rotating ring 9 passes through the support seat 8 and is rotatably connected to the support seat 8. One end of the gear mechanism 10 is arranged on the machine platform 1, and the other end is arranged on the rotating ring 9. according to Figure 1 , Figure 3 The gear mechanism 10 includes a driving motor 11, a gear 12, and a gear ring 13. A placement groove is provided on the machine 1. The driving motor 11 is arranged in the placement groove and is fixedly connected to the machine 1. The gear 12 is coaxially fixedly connected to the output end of the driving motor 11. The gear ring 13 is fixedly sleeved on the surface of the rotating ring 9 and meshes with the gear 12. When the driving motor 11 is started, it drives the gear 12 to rotate, and then drives the gear ring 13 to rotate, and then drives the rotating ring 9 to rotate.

[0033] The present invention is based on Figure 2 , Figure 3 , Figure 4 The multi-directional grinding disc fitting mechanism 5 includes a collar plate 14, a gear ring 15, a gear 16, a drive motor 47, and a grinding adjustment mechanism 17. The collar plate 14 is fixedly connected to the end of the rotating ring 9, the gear ring 15 is rotatably connected to the end of the collar plate 14 away from the rotating ring 9, the gear 16 is meshed with the gear ring 15, the drive motor 47 is fixedly connected to the collar plate 14, the gear 16 is connected to the output end of the drive motor 47, and the grinding adjustment mechanism 17 is connected to the collar plate 14 and the gear ring 15. The drive motor 47 rotates, driving the gear 16 to rotate, and then driving the gear ring 15 to rotate, providing power for the operation of the grinding adjustment mechanism 17; according to Figure 3 , Figure 4 , Figure 5 The grinding adjustment mechanism 17 has four groups of surrounding arrays based on the center position of the ring plate 14. The grinding adjustment mechanism 17 includes an arc-shaped grinding disc 18, an adjustment plate 19, an adjustment rod 20, and an arc-shaped groove 21. The arc-shaped grinding disc 18 is arranged in the ring plate 14 and fits the surface of the pipe body. The adjustment plate 19 is fixed to the arc-shaped grinding disc 18 and moves through the ring plate 14. The adjustment rod 20 is fixedly connected to the adjustment plate 19. The arc-shaped groove 21 is arranged on the gear ring 13. The end of the adjustment rod 20 away from the adjustment plate 19 is arranged in the arc-shaped groove 21 and moves in the arc-shaped groove 21. When the gear ring 2 15 rotates, the arc-shaped grinding disc 18 is pushed to move to the center position of the large pipe under the action of the arc-shaped groove 21 and the adjustment rod 20.

[0034] The present invention is based on Figure 2 , Figure 3 , Figure 6The welding mechanism 6 includes a supporting vertical plate 22, a supporting horizontal plate 23, and a welding head 24. The supporting vertical plate 22 is fixedly connected to the surface of the rotating ring 9, and the supporting horizontal plate 23 movably passes through the supporting vertical plate 22. The welding head 24 is fixedly connected to the supporting horizontal plate 23. A through groove 25 is provided on the rotating ring 9. The end of the welding head 24 away from the supporting horizontal plate 23 is arranged in the through groove 25 and is arranged between the two tube bodies. The through groove 25 facilitates the movement of the welding head 24.

[0035] The present invention is based on Figure 1 , Figure 2 , Figure 4 , Figure 7 The reciprocating pushing mechanism 7 of the welding mechanism includes a support seat mechanism 26 and an adjusting head mechanism 27. The support seat mechanism 26 is fixedly connected to the machine platform 1 and is rotatably connected to the gear ring 2 15 to support the ring plate 29. The adjusting head mechanism 27 is annularly slidably arranged on the support seat mechanism 26 to ensure the smooth operation of the welding mechanism 6. The support seat mechanism 26 includes a support seat 28, a ring plate 29, and an annular guide plate 30. The support seat 28 is fixedly connected to the machine platform 1. The ring plate 29 is fixedly connected to the support seat 28 and is rotatably connected to the gear ring 2 15. The annular guide plate 30 is fixedly sleeved on the ring plate 29.

[0036] The present invention is based on Figure 6 , Figure 7 , Figure 8 The adjusting head mechanism 27 includes an arc block 31, an adjusting head 32, and a connecting rod 33. The arc block 31 is annularly slidably arranged on the annular guide plate 30 through a sliding mechanism. The arc block 31 is provided with a through groove. The adjusting head 32 is arranged in the through groove and is slidingly connected to the arc block 31 through a second sliding mechanism. The connecting rod 33 is fixed through the adjusting head 32, and its upper end is connected to the supporting cross plate 23. The annular guide plate 30 is provided with an arc-shaped corrugated groove 34. The lower end of the connecting rod 33 is arranged in the arc-shaped corrugated groove 34, and the arc-shaped corrugated groove 34 pushes the connecting rod 33 reciprocatingly.

[0037] The present invention is based on Figure 1 , Fig.10 The large tube fixing structure 2 includes a support seat body 35, a semi-annular groove 36, an arc-shaped clamping plate 37, and a power mechanism 38. The support seat body 35 is fixedly connected to the machine platform 1. There are two semi-annular grooves 36, which are symmetrically arranged on the support seat body 35. The semi-annular grooves 36 facilitate the annular sliding of the arc-shaped clamping plate 37. There are two groups of arc-shaped clamping plates 37, which are respectively arranged in two semi-annular grooves 36 and are annularly slidably connected to the support seat body 35. The power mechanism 38 is engaged with the arc-shaped clamping plate 37 and is fixedly connected to the support seat body 35. The support seat body 35 supports the large tube, and the power mechanism 38 provides power for the rotation of the arc-shaped clamping plate 37.

[0038] The present invention is based on Fig.10 , Fig.11 The power mechanism 38 includes a driving motor three 39, a gear three 40, a bevel gear mechanism 41, and a gear four 42. The driving motor three 39 is fixedly connected to the support seat body 35. The support seat body 35 is provided with a placement groove 46 that communicates with the semi-annular groove 36, and the placement groove 6 is symmetrically distributed with respect to the center position of the support seat body 35. The gear three 40, the gear four 42, and the bevel gear mechanism 41 are arranged in the placement groove 46. The gear three 40 is fixedly connected to the output end of the driving motor three 39 through a connecting shaft. The gear three 40 is meshed with one of the arc-shaped clamping plates 37. The bevel gear mechanism 41 is rotationally connected to the support seat body 35, and its two ends are respectively fixedly connected to the gear three 40 and the gear four 42. The bevel gear four 42 is rotationally connected to the support seat body 35, and the bevel gear mechanism 41 provides opposite power for the rotation of the gear three 40 and the gear four 42.

[0039] The present invention is based on Fig.10 , Fig.11 The bevel gear mechanism 41 includes bevel gear one 43, bevel gear two 44, and bevel gear three 45. Bevel gear one 43 is coaxially fixedly connected to the surface of the connecting shaft, bevel gear two 44 is rotationally connected to the support seat body 35 and meshes with bevel gear one 43, and bevel gear three 45 meshes with bevel gear two 44 and is coaxially fixedly connected to gear four 42.

[0040] The present invention comprises the following steps: Step 1: According to Fig.10 , Fig.11 The driving motor 39 is started, driving the gear 3 40 to rotate, driving the gear 4 42 to rotate through the bevel gear mechanism 41, and driving the two arc-shaped clamping plates 37 to rotate 90 degrees in opposite directions through the gear 3 40 and the gear 4 42 rotating in the opposite direction, and fixing the large pipe through the two arc-shaped clamping plates 37; Step 2: According to Figure 4 , Figure 5 The second driving motor 47 is started, driving the second gear 16 to rotate, driving the second gear ring 15 to rotate, so that the adjustment rod 20 is displaced in the arc groove 21, so that the adjustment plate 19 and the arc grinding disc 18 move to the center position of the collar plate 14, and the four arc grinding discs 18 are pressed against the surfaces of the two large pipes; Step 3: According to Figure 3 , Figure 4 , Figure 5 The driving motor 11 is started, driving the gear 12 to rotate, thereby driving the gear ring 13 to rotate, thereby driving the rotating ring 9 to rotate, and then driving the ring plate 14 and the gear ring 2 15 to rotate, and then driving the four arc-shaped grinding discs 18 to rotate, and the two ends of the surface of the large pipe welding part are grinded by the four arc-shaped grinding discs 18; Step 4: According to Figure 3 , Figure 6 , Figure 7 , Figure 8 The driving motor 11 is started, driving the gear 12 to rotate, thereby driving the gear ring 13 to rotate, thereby driving the rotating ring 9 to rotate, thereby driving the supporting vertical plate 22 to rotate, driving the supporting horizontal plate 23 and the welding head 24 to rotate, and welding the two large pipes at the joint position. Under the action of the arc-shaped corrugated groove 34, the connecting rod 33 reciprocates back and forth, thereby causing the supporting horizontal plate 23 and the welding head 24 to reciprocate back and forth, ensuring the welding effect.

[0041] Principle of the present invention: When in use, two large tubes are placed on two supporting seats 35 respectively through external devices, and the two large tubes are pushed so that the ends of the two large tubes move into the collar plate 14 to abut against each other, and the driving motor 3 39 is started to drive the gear 3 40 to rotate, and the gear 4 42 is driven to rotate through the bevel gear mechanism 41. The rotation directions of the gear 3 40 and the gear 4 42 are opposite, and the two arc-shaped clamping plates 37 are driven to rotate 90 degrees in opposite directions through the oppositely rotating gears 3 40 and 42, and the large tubes are fixed by the two arc-shaped clamping plates 37; After fixing, the driving motor 2 47 is started, driving the gear 2 16 to rotate, driving the gear ring 2 15 to rotate, so that the adjustment rod 20 is displaced in the arc groove 21, so that the adjustment plate 19 and the arc grinding disc 18 move to the center position of the ring plate 14, and the four arc grinding discs 18 are pressed against the surfaces of the two large pipes; The driving motor 11 is started, driving the gear 12 to rotate, thereby driving the gear ring 13 to rotate, thereby driving the rotating ring 9 to rotate, and then driving the ring plate 14 and the gear ring 2 15 to rotate, and then driving the four arc-shaped grinding discs 18 to rotate, and the two ends of the surface of the large pipe welding part are grinded by the four arc-shaped grinding discs 18; After the grinding is completed, the driving motor 2 47 starts to reverse, the arc-shaped grinding disc 18 moves away from the large pipe, and the driving motor 11 starts, driving the gear 12 to rotate, thereby driving the gear ring 13 to rotate, thereby driving the rotating ring 9 to rotate, thereby driving the supporting vertical plate 22 to rotate, driving the supporting horizontal plate 23 and the welding head 24 to rotate, and welding the two large pipes at the joint position. Under the action of the arc-shaped corrugated groove 34, the connecting rod 33 moves back and forth, thereby causing the supporting horizontal plate 23 and the welding head 24 to move back and forth to ensure the welding effect.

[0042] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the authorization requirements.

Claims

1. A device for welding large diameter pipes, characterized in that: The machine platform (1) is provided with a large tube fixing mechanism (2) and a grinding and welding mechanism (3); the large tube fixing mechanism (2) is provided with two groups, which are symmetrically arranged on the machine platform (1); the grinding and welding mechanism (3) is arranged between the two groups of large tube fixing mechanisms (2); the grinding and welding mechanism (3) comprises a grinding and welding driving mechanism (4), a multi-directional grinding disc laminating mechanism (5), a welding mechanism (6), and a welding mechanism reciprocating driving mechanism (7); The grinding and welding driving mechanism (4) is fixedly connected to the machine platform (1), the multi-directional grinding disc laminating mechanism (5) is connected to the grinding and welding driving mechanism (4), the welding mechanism (6) is arranged on the grinding and welding driving mechanism (4), and the welding mechanism reciprocating driving mechanism (7) is arranged on the machine platform (1) and is rotationally connected to the multi-directional grinding disc laminating mechanism (5).

2. The device for welding large diameter pipes according to claim 1, characterized in that: The grinding and welding driving mechanism (4) comprises a support base (8), a rotating ring (9), and a gear mechanism (10); the support base (8) is fixedly connected to the machine platform (1); the rotating ring (9) passes through the support base (8) and is rotatably connected to the support base (8); one end of the gear mechanism (10) is arranged on the machine platform (1), and the other end is arranged on the rotating ring (9); The gear mechanism (10) comprises a driving motor (11), a gear (12), and a gear ring (13). A placement groove is provided on the machine (1). The driving motor (11) is arranged in the placement groove and is fixedly connected to the machine (1). The gear (12) is coaxially fixedly connected to the output end of the driving motor (11). The gear ring (13) is fixedly sleeved on the surface of the rotating ring (9) and meshes with the gear (12).

3. The device for welding large diameter pipes according to claim 2, characterized in that: The multi-directional grinding disc fitting mechanism (5) comprises a collar plate (14), a second gear ring (15), a second gear (16), a second drive motor (47), and a grinding adjustment mechanism (17); the collar plate (14) is fixedly connected to the end of the rotating ring (9); the second gear ring (15) is rotatably connected to the end of the collar plate (14) away from the rotating ring (9); the second gear (16) is meshed with the second gear ring (15); the second drive motor (47) is fixedly connected to the collar plate (14); the second gear (16) is connected to the output end of the second drive motor (47); and the grinding adjustment mechanism (17) is connected to the collar plate (14) and the second gear ring (15); The grinding adjustment mechanism (17) has four groups of surrounding arrays with the center position of the collar plate (14) as a reference. The grinding adjustment mechanism (17) comprises an arc-shaped grinding disc (18), an adjustment plate (19), an adjustment rod (20), and an arc-shaped groove (21). The arc-shaped grinding disc (18) is arranged in the collar plate (14) and fits the surface of the tube body. The adjustment plate (19) is fixedly connected to the arc-shaped grinding disc (18) and movably passes through the collar plate (14). The adjustment rod (20) is fixedly connected to the adjustment plate (19). The arc-shaped groove (21) is arranged on the gear ring (13). The end of the adjustment rod (20) away from the adjustment plate (19) is arranged in the arc-shaped groove (21) and moves in the arc-shaped groove (21).

4. The device for welding large diameter pipes according to claim 3, characterized in that: The welding mechanism (6) comprises a supporting vertical plate (22), a supporting horizontal plate (23), and a welding head (24); the supporting vertical plate (22) is fixedly connected to the surface of the rotating ring (9); the supporting horizontal plate (23) movably passes through the supporting vertical plate (22); the welding head (24) is fixedly connected to the supporting horizontal plate (23); a through groove (25) is provided on the rotating ring (9); an end of the welding head (24) away from the supporting horizontal plate (23) is arranged in the through groove (25) and is arranged between the two tube bodies.

5. The device for welding large diameter pipes according to claim 4, characterized in that: The welding mechanism reciprocating driving mechanism (7) comprises a support seat mechanism (26) and an adjustment head mechanism (27); the support seat mechanism (26) is fixedly connected to the machine platform (1) and is rotatably connected to the second gear ring (15); the adjustment head mechanism (27) is annularly slidably arranged on the support seat mechanism (26); The support seat mechanism (26) comprises a second support seat (28), a collar plate (29), and an annular guide plate (30); the second support seat (28) is fixedly connected to the machine platform (1); the collar plate (29) is fixedly connected to the second support seat (28) and is rotatably connected to the second gear ring (15); and the annular guide plate (30) is fixedly sleeved on the collar plate (29).

6. The device for welding large diameter pipes according to claim 5, characterized in that: The adjusting head mechanism (27) comprises an arc block (31), an adjusting head (32), and a connecting rod (33); the arc block (31) is annularly slidably arranged on the annular guide rail plate (30) via a sliding mechanism; the arc block (31) is provided with a through groove; the adjusting head (32) is arranged in the through groove and is slidably connected to the arc block (31) via a second sliding mechanism; the connecting rod (33) is fixedly passed through the adjusting head (32), and the upper end thereof is connected to the supporting cross plate (23); the annular guide rail plate (30) is provided with an arc-shaped corrugated groove (34), and the lower end of the connecting rod (33) is arranged in the arc-shaped corrugated groove (34).

7. The device for welding large diameter pipes according to claim 6, characterized in that: The large tube fixing structure (2) comprises a support seat body (35), a semi-annular groove (36), an arc-shaped clamping plate (37), and a power mechanism (38). The support seat body (35) is fixedly connected to the machine platform (1). Two semi-annular grooves (36) are provided and symmetrically arranged on the support seat body (35). Two groups of arc-shaped clamping plates (37) are provided and are respectively arranged in two semi-annular grooves (36) and are annularly slidably connected to the support seat body (35). The power mechanism (38) is meshed with the arc-shaped clamping plate (37) and is fixedly connected to the support seat body (35).

8. The device for welding large diameter pipes according to claim 7, characterized in that: The power mechanism (38) comprises a driving motor three (39), a gear three (40), a bevel gear mechanism (41), and a gear four (42). The driving motor three (39) is fixedly connected to the support seat body (35). The support seat body (35) is provided with a placement groove (46) which is in communication with the semi-annular groove (36), and the placement groove (46) is symmetrically distributed with respect to the center position of the support seat body (35). The gear three (40), the gear four (42), and the bevel gear mechanism (41) are arranged in the placement groove (46). The gear three (40) is fixedly connected to the output end of the driving motor three (39) through a connecting shaft. The gear three (40) is meshed with one of the arc-shaped clamping plates (37). The bevel gear mechanism (41) is rotationally connected to the support seat body (35), and its two ends are respectively fixedly connected to the gear three (40) and the gear four (42). The bevel gear four (42) is rotationally connected to the support seat body (35).

9. The device for welding large diameter pipes according to claim 8, characterized in that: The bevel gear mechanism (41) comprises a bevel gear 1 (43), a bevel gear 2 (44), and a bevel gear 3 (45); the bevel gear 1 (43) is coaxially fixedly connected to the surface of the connecting shaft; the bevel gear 2 (44) is rotationally connected to the support seat body (35) and meshes with the bevel gear 1 (43); the bevel gear 3 (45) meshes with the bevel gear 2 (44) and is coaxially fixedly connected to the gear 4 (42).

10. A method for welding a large diameter pipe body, comprising the following steps: Step 1: The driving motor 3 (39) is started to drive the gear 3 (40) to rotate, and the gear 4 (42) is driven to rotate through the bevel gear mechanism (41), and the gear 3 (40) and the gear 4 (42) that rotate in opposite directions drive the two arc-shaped clamping plates (37) to rotate 90 degrees in opposite directions, and the large pipe is fixed by the two arc-shaped clamping plates (37); Step 2: The second drive motor (47) is started to drive the second gear (16) to rotate, and the second gear ring (15) to rotate, so that the adjustment rod (20) is displaced in the arc groove (21), thereby causing the adjustment plate (19) and the arc grinding disc (18) to move toward the center position of the collar plate (14), and the four arc grinding discs (18) are pressed against the surfaces of the two large pipes; Step 3: The driving motor 1 (11) is started to drive the gear 1 (12) to rotate, thereby driving the gear ring 1 (13) to rotate, thereby driving the rotating ring (9) to rotate, and then driving the ring plate (14) and the gear ring 2 (15) to rotate, and then driving the four arc-shaped grinding discs (18) to rotate, and the two ends of the surface of the large pipe welding part are grinded by the four arc-shaped grinding discs (18); Step 4: The driving motor 1 (11) is started to drive the gear 1 (12) to rotate, thereby driving the gear ring 1 (13) to rotate, thereby driving the rotating ring (9) to rotate, thereby driving the supporting vertical plate (22) to rotate, driving the supporting horizontal plate (23) and the welding head (24) to rotate, and welding is performed on the joint positions of the two large pipes. Under the action of the arc-shaped corrugated groove (34), the connecting rod (33) is caused to reciprocate, thereby causing the supporting horizontal plate (23) and the welding head (24) to reciprocate.

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