A device and method for welding large-diameter pipe bodies

Abstract

A device for welding large-diameter pipe bodies provided by the present invention relates to the technical field of pipeline welding, and includes a machine table. There are large pipe fixing mechanisms and a grinding and welding mechanism on the machine table. The grinding and welding mechanism is arranged between two groups of large pipe fixing mechanisms. The grinding and welding mechanism includes a grinding and welding driving mechanism, a multi-directional grinding disc fitting mechanism, a welding mechanism, and a reciprocating pushing mechanism for the welding mechanism. The grinding and welding driving mechanism is fixedly connected to the machine table. The multi-directional grinding disc fitting mechanism is connected to the grinding and welding driving mechanism. The welding mechanism is arranged on the grinding and welding driving mechanism. The reciprocating pushing mechanism for the welding mechanism is arranged on the machine table and is rotationally connected to the multi-directional grinding disc fitting mechanism. The devices for grinding and welding are placed on one machine table, reducing the occupied space. The grinding and welding are driven by one driving mechanism, reducing resource waste. Multiple grinding discs are used for grinding, improving the efficiency. The welding head rotates annularly, reducing the possibility of misalignment caused by the rotation of the pipe body and ensuring the welding effect.

Description

Technical Field

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

[0002] Pipelines are required as transmission media for transporting petroleum, natural gas, water energy resources, etc. However, such transmissions often have high requirements for the sealing performance and length of the pipelines to ensure their sealing performance. Currently, the welding between pipes is increasingly widely used. During the connection process of metal pipelines, butt welding needs to be performed.

[0003] When the existing large-diameter pipe body welding device is welding, it is necessary to polish the welding area to ensure the welding effect during welding. However, the welding and polishing are carried out on two machine tools, increasing the floor area. During the polishing process, the two ends of the connection of the pipe body are polished by a single polishing disc, affecting the polishing efficiency;

[0004] Moreover, during welding, usually two pipe bodies are rotated, and the connection is welded by a welding head. However, when the pipe bodies are rotating, they are prone to vibration misalignment, and the connection effect of the welding area is easily affected when the two pipe bodies are vibrating and misaligned;

[0005] Finally, the welding head needs to rotate and reciprocally translate and rotate during welding. These two motion forms require separate drive controls, increasing the cost;

[0006] In view of the above problems, we propose a device and method for welding large-diameter pipe bodies. Summary of the Invention

[0007] In view of the problems in the above-mentioned prior art that the welding and polishing devices are divided into two machine tools, resulting in a large occupied area, and the low efficiency of a single polishing disc, and the vibration misalignment caused by the rotation of the pipe body, affecting the welding effect, the present invention proposes a device and method for welding large-diameter pipe bodies.

[0008] A device for welding large-diameter pipe bodies provided by the present invention includes a machine platform, on which a large pipe fixing mechanism and a grinding and welding mechanism are provided. There are two groups of the large pipe fixing mechanisms, symmetrically arranged on the machine platform. The grinding and welding mechanism is arranged between the two groups of large pipe fixing mechanisms. The grinding and welding mechanism includes a grinding and welding driving mechanism, a multi-directional polishing disc fitting mechanism, a welding mechanism, and a welding mechanism reciprocating pushing mechanism;

[0009] The grinding and welding driving mechanism is fixedly connected to the machine platform. The multi-directional polishing disc fitting mechanism is connected to the grinding and welding driving mechanism. The welding mechanism is arranged on the grinding and welding driving mechanism. The welding mechanism reciprocating pushing mechanism is arranged on the machine platform and is rotationally connected to the multi-directional polishing disc fitting mechanism.

[0010] A further improvement of the present invention, the grinding and welding driving mechanism includes a support seat, a rotating ring, and a gear mechanism. The support seat is fixedly connected to the machine table. The rotating ring passes through the support seat and is rotatably connected to the support seat. One end of the gear mechanism is arranged on the machine table, and the other end is arranged on the rotating ring;

[0011] The gear mechanism includes a driving motor 1, a gear 1, and a toothed ring 1. A placement groove is provided on the machine table. The driving motor 1 is arranged in the placement groove and fixedly connected to the machine table. The gear 1 is coaxially and fixedly connected to the output end of the driving motor 1. The toothed ring 1 is fixedly sleeved on the surface of the rotating ring and meshes with the gear 1.

[0012] A further improvement of the present invention, the multi-directional grinding disc fitting mechanism includes a collar plate 1, a toothed ring 2, a gear 2, a driving motor 2, and a grinding adjustment mechanism. The collar plate 1 is fixedly connected to the end of the rotating ring. The toothed ring 2 is rotatably connected to the end of the collar plate 1 away from the rotating ring. The gear 2 meshes with the toothed ring 2. The driving motor 2 is fixedly connected to the collar plate 1. The gear 2 is connected to the output end of the driving motor 2. The grinding adjustment mechanism is connected to the collar plate 1 and the toothed ring 2;

[0013] The grinding adjustment mechanism is arranged in an array of four groups centered on the center position of the collar plate 1. 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 inside the collar plate 1 and fits on the surface of the pipe body. The adjustment plate is fixedly connected to the arc-shaped grinding disc and movably passes through the collar plate 1. The adjustment rod is fixedly connected to the adjustment plate. The arc-shaped groove is arranged on the toothed ring 1. 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.

[0014] A further improvement of the present invention, the welding mechanism includes a support vertical plate, a support horizontal plate, and a welding head. The support vertical plate is fixedly connected to the surface of the rotating ring. The support horizontal plate movably passes through the support vertical plate. The welding head is fixedly connected to the support horizontal plate. A through groove is provided on the rotating ring. The end of the welding head away from the support horizontal plate is arranged in the through groove and is arranged between two pipe bodies.

[0015] A further improvement of the present invention, the reciprocating pushing mechanism of the welding mechanism includes a support seat mechanism and an adjustment head mechanism. The support seat mechanism is fixedly connected to the machine table and is rotatably connected to the toothed ring 2. The adjustment head mechanism is annularly slidably arranged on the support seat mechanism;

[0016] The support seat mechanism includes a support seat 2, a collar plate 2, and an annular guide rail plate. The support seat 2 is fixedly connected to the machine table. The collar plate 2 is fixedly connected to the support seat 2 and is rotatably connected to the toothed ring 2. The annular guide rail plate is fixedly sleeved on the collar plate 2.

[0017] For a further improved solution of the present invention, the adjusting head mechanism includes an arc-shaped block, an adjusting head, and a connecting rod. The arc-shaped block is annularly slidably arranged on the annular guide plate through a sliding mechanism. A through groove is provided on the arc-shaped block. The adjusting head is arranged in the through groove and is slidably connected to the arc-shaped block through a second sliding mechanism. The connecting rod is fixedly passed through the adjusting head, and its upper end is connected to the supporting cross plate. An arc-shaped corrugated groove is provided on the annular guide plate, and the lower end of the connecting rod is arranged in the arc-shaped corrugated groove.

[0018] For a further improved solution of the present invention, the large pipe fixing mechanism includes a supporting seat body, a semi-circular groove, an arc-shaped clamping plate, and a power mechanism. The supporting seat body is fixedly connected to the machine table. There are two semi-circular grooves, symmetrically arranged on the supporting seat body. There are two groups of arc-shaped clamping plates, respectively arranged in the two semi-circular grooves and annularly slidably connected to the supporting seat body. The power mechanism meshes with the arc-shaped clamping plate and is fixedly connected to the supporting seat body.

[0019] For a further improved solution of the present invention, 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 supporting seat body. A placement groove communicating with the semi-circular groove is provided on the supporting seat body, and the placement grooves are symmetrically distributed based on the central position of the supporting seat body. The gear three, the gear four, and the bevel gear mechanism are arranged in the placement groove. The gear three is fixedly connected to the output end of the driving motor three through a coupling shaft. The gear three meshes with one of the arc-shaped clamping plates. The bevel gear mechanism is rotatably connected to the supporting seat body, and its two ends are respectively fixedly connected to the gear three and the gear four. The gear four is rotatably connected to the supporting seat body.

[0020] For a further improved solution of the present invention, the bevel gear mechanism includes a bevel gear one, a bevel gear two, and a bevel gear three. The bevel gear one is coaxially fixedly connected to the surface of the connecting shaft. The bevel gear two is rotatably connected to the supporting seat body and meshes with the bevel gear one. The bevel gear three meshes with the bevel gear two and is coaxially fixedly connected to the gear four.

[0021] For a further improved solution of the present invention, a method for welding large-diameter pipe bodies includes the following steps:

[0022] Step 1: Start the driving motor three to drive the gear three to rotate, drive the gear four 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 gear three and gear four, and fix the large pipe through the two arc-shaped clamping plates.

[0023] Step 2: Start the driving motor two to drive the gear two to rotate, drive the toothed ring two to rotate, so that the adjusting rod displaces in the arc-shaped groove, thereby causing the adjusting plate and the arc-shaped grinding disc to move towards the center position of the sleeve ring plate one, and press against the surfaces of the two large pipes through the four arc-shaped grinding discs.

[0024] Step 3: Start the first driving motor, which drives the first gear to rotate, thereby driving the first toothed ring to rotate, then driving the rotating ring to rotate, further driving the first collar plate and the second toothed ring to rotate, and then driving the four arc-shaped grinding discs to rotate. The two ends of the surface of the welded joint of the large pipe are ground by the four arc-shaped grinding discs.

[0025] Step 4: Start the first driving motor, which drives the first gear to rotate, thereby driving the first toothed ring to rotate, then driving the rotating ring to rotate, then driving the supporting vertical plate to rotate, driving the supporting horizontal plate and the welding head to rotate, and welding the butt joint position of the two large pipes. Under the action of the arc-shaped corrugated groove, the connecting rod makes a reciprocating back-and-forth movement, so that the supporting horizontal plate and the welding head make a reciprocating back-and-forth movement to ensure the welding effect.

[0026] The beneficial effects of the present invention: A device and method for welding large-diameter pipe bodies provided by the present invention:

[0027] First, by placing the grinding and welding devices on one machine table, the occupied space is reduced. Moreover, the grinding and welding are driven by one driving mechanism, reducing resource waste.

[0028] Second, by using multiple grinding discs to grind the two ends of the surface of the pipe weld, the efficiency is improved.

[0029] Third, by rotating the welding head in a circular motion to weld the connection of the pipe body, the possibility of misalignment caused by the rotation of the pipe body is reduced, ensuring the connection effect.

[0030] Fourth, by driving the rotation and translation of the welding head with one first driving motor, the cost and resource waste are reduced.

[0031] Fourth, through the power mechanism in the large pipe fixing mechanism, the two arc-shaped clamping plates are respectively rotated to the left and right sides to fix the large pipe. Compared with the prior art method of fixing the large pipe by screwing bolts and using a clamping ring, the efficiency of fixing the large pipe is improved. Description of the Drawings

[0032] Figure 1 It is a structural diagram of a device and method for welding large-diameter pipe bodies of the present invention.

[0033] Figure 2 It is a structural diagram of the grinding and welding mechanism of a device and method for welding large-diameter pipe bodies of the present invention.

[0034] Figure 3 It is a structural diagram of the grinding and welding driving mechanism and the gear mechanism of a device and method for welding large-diameter pipe bodies of the present invention.

[0035] Figure 4Structural diagram of the multi-directional grinding disc fitting mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0036] Figure 5 Structural diagram of the grinding adjustment mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0037] Figure 6 Structural diagram of the welding mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0038] Figure 7 Structural diagram of the reciprocating pushing mechanism of the welding mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0039] Figure 8 Structural diagram of the adjustment head mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0040] Figure 9 Structural diagram of the large pipe fixing mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0041] Figure 10 Exploded view of the large pipe fixing mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0042] Figure 11 Structural diagram of the bevel gear mechanism of a device and method for large-diameter pipe welding according to the present invention.

[0043] In the drawings: 1, machine table; 2, large pipe fixing mechanism; 3, grinding and welding mechanism; 4, grinding and welding drive mechanism; 5, multi-directional grinding disc fitting mechanism; 6, welding mechanism; 7, reciprocating pushing mechanism of welding mechanism; 8, support seat; 9, rotating ring; 10, gear mechanism; 11, driving motor 1; 12, gear 1; 13, gear ring 1; 14, collar plate 1; 15, gear ring 2; 16, gear 2; 17, grinding adjustment mechanism; 18, arc-shaped grinding disc; 19, adjustment plate; 20, adjustment rod; 21, arc-shaped 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 2; 29, collar plate 2; 30, annular guide rail plate; 31, arc-shaped block; 32, adjustment head; 33, connecting rod; 34, arc-shaped corrugated groove; 35, support seat body; 36, semi-circular groove; 37, arc-shaped clamping plate; 38, power mechanism; 39, driving motor 3; 40, gear 3; 41, bevel gear mechanism; 42, gear 4; 43, bevel gear 1; 44, bevel gear 2; 45, bevel gear 3; 46, placement groove; 47, driving motor 2. Detailed implementation manners

[0044] To facilitate the understanding of the present invention, the present application will be described more comprehensively with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0045] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill 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 of the related listed items.

[0047] According to Figures 1 - 11 As shown, a device for welding large-diameter pipe bodies includes a machine table 1. On the machine table 1, there are a large pipe fixing mechanism 2 and a grinding and welding mechanism 3. There are two groups of the large pipe fixing mechanisms 2, which are symmetrically arranged on the machine table 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 includes a grinding and welding driving mechanism 4, a multi-directional grinding disc fitting mechanism 5, a welding mechanism 6, and a welding mechanism reciprocating pushing mechanism 7. When the grinding and welding driving mechanism 4 is started, it drives the multi-directional grinding disc fitting mechanism 5 and the welding mechanism 6 to rotate, and respectively grinds and welds the large pipe through the multi-directional grinding disc fitting mechanism 5 and the welding mechanism 6. When the welding mechanism 6 rotates, the welding mechanism reciprocating pushing mechanism 7 pushes it to perform a reciprocating motion.

[0048] The grinding and welding driving mechanism 4 is fixedly connected to the machine table 1. The multi-directional grinding disc fitting 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. The welding mechanism reciprocating pushing mechanism 7 is arranged on the machine table 1 and is rotationally connected to the multi-directional grinding disc fitting mechanism 5.

[0049] The grinding and welding driving mechanism 4 of the present invention includes a support seat 8, a rotating ring 9, and a gear mechanism 10. The support seat 8 is fixedly connected to the machine table 1 to support the rotating ring 9. The rotating ring 9 passes through the support seat 8 and is rotationally connected to the support seat 8. One end of the gear mechanism 10 is arranged on the machine table 1, and the other end is arranged on the rotating ring 9.

[0050] The gear mechanism 10 includes a first driving motor 11, a first gear 12, and a first toothed ring 13. A placement groove is provided on the machine table 1. The first driving motor 11 is arranged in the placement groove and fixedly connected to the machine table 1. The first gear 12 is coaxially and fixedly connected to the output end of the first driving motor 11. The first toothed ring 13 is fixedly sleeved on the surface of the rotating ring 9 and meshes with the first gear 12. When the first driving motor 11 is started, it drives the first gear 12 to rotate, thereby driving the first toothed ring 13 to rotate, and further driving the rotating ring 9 to rotate.

[0051] The multi-directional grinding disc fitting mechanism 5 of the present invention includes a first collar plate 14, a second toothed ring 15, a second gear 16, a second driving motor 47, and a grinding adjustment mechanism 17. The first collar plate 14 is fixedly connected to the end of the rotating ring 9. The second toothed ring 15 is rotatably connected to the end of the first collar plate 14 away from the rotating ring 9. The second gear 16 meshes with the second toothed ring 15. The second driving motor 47 is fixedly connected to the first collar plate 14. The second gear 16 is connected to the output end of the second driving motor 47. The grinding adjustment mechanism 17 is connected to the first collar plate 14 and the second toothed ring 15. When the second driving motor 47 rotates, it drives the second gear 16 to rotate, thereby driving the second toothed ring 15 to rotate, providing power for the operation of the grinding adjustment mechanism 17;

[0052] Four groups of the grinding adjustment mechanisms 17 are arranged in a circumferential array with the center position of the first collar plate 14 as the reference. 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 inside the first collar plate 14 and fits on the surface of the pipe body. The adjustment plate 19 is fixedly connected to the arc-shaped grinding disc 18 and movably passes through the first collar plate 14. The adjustment rod 20 is fixedly connected to the adjustment plate 19. The arc-shaped groove 21 is arranged on the first toothed 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 second toothed ring 15 rotates, under the action of the arc-shaped groove 21 and the adjustment rod 20, the arc-shaped grinding disc 18 is pushed towards the center position of the large pipe.

[0053] The welding mechanism 6 of the present invention includes a support vertical plate 22, a support horizontal plate 23, and a welding head 24. The support vertical plate 22 is fixedly connected to the surface of the rotating ring 9. The support horizontal plate 23 movably passes through the support vertical plate 22. The welding head 24 is fixedly connected to the support horizontal plate 23. A through groove 25 is provided on the rotating ring 9. The end of the welding head 24 away from the support horizontal plate 23 is arranged in the through groove 25 and is arranged between two pipe bodies. The through groove 25 facilitates the movement of the welding head 24.

[0054] The reciprocating driving mechanism 7 of the welding mechanism described in the present invention includes a support seat mechanism 26 and an adjusting head mechanism 27. The support seat mechanism 26 is fixedly connected to the machine table 1 and is rotatably connected to the second gear ring 15 to support the second sleeve plate 29. The adjusting head mechanism 27 is annularly slidably arranged on the support seat mechanism 26 to ensure the stable operation of the welding mechanism 6. The support seat mechanism 26 includes a second support seat 28, a second sleeve plate 29, and an annular guide rail plate 30. The second support seat 28 is fixedly connected to the machine table 1. The second sleeve plate 29 is fixedly connected to the second support seat 28 and is rotatably connected to the second gear ring 15. The annular guide rail plate 30 is fixedly sleeved on the second sleeve plate 29.

[0055] The adjusting head mechanism 27 described in the present invention includes an arc-shaped block 31, an adjusting head 32, and a connecting rod 33. The arc-shaped block 31 is annularly slidably arranged on the annular guide rail plate 30 through a sliding mechanism. A through groove is provided on the arc-shaped block 31. The adjusting head 32 is arranged in the through groove and is slidably connected to the arc-shaped block 31 through a second sliding mechanism. The connecting rod 33 is fixedly passed through the adjusting head 32, and its upper end is connected to the support cross plate 23. An arc-shaped corrugated groove 34 is provided on the annular guide rail plate 30. The lower end of the connecting rod 33 is arranged in the arc-shaped corrugated groove 34, and the arc-shaped corrugated groove 34 reciprocally pushes the connecting rod 33.

[0056] The large pipe fixing mechanism 2 described in the present invention includes a support seat body 35, a semi-circular groove 36, an arc-shaped clamping plate 37, and a power mechanism 38. The support seat body 35 is fixedly connected to the machine table 1. There are two semi-circular grooves 36, symmetrically arranged on the support seat body 35. The semi-circular grooves 36 facilitate the annular sliding of the arc-shaped clamping plate 37. There are two groups of arc-shaped clamping plates 37, respectively arranged in the two semi-circular grooves 36 and 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 pipe, and the power mechanism 38 provides power for the rotation of the arc-shaped clamping plate 37.

[0057] The power mechanism 38 described in the present invention includes a third driving motor 39, a third gear 40, a bevel gear mechanism 41, and a fourth gear 42. The third driving motor 39 is fixedly connected to the support seat body 35. A placement groove 46 communicating with the semi-circular groove 36 is provided on the support seat body 35, and the placement grooves 46 are symmetrically distributed based on the central position of the support seat body 35. The third gear 40, the fourth gear 42, and the bevel gear mechanism 41 are arranged in the placement groove 46. The third gear 40 is fixedly connected to the output end of the third driving motor 39 through a coupling. The third gear 40 is engaged with one of the arc-shaped clamping plates 37. The bevel gear mechanism 41 is rotatably connected to the support seat body 35, and its two ends are respectively fixedly connected to the third gear 40 and the fourth gear 42. The fourth gear 42 is rotatably connected to the support seat body 35. The bevel gear mechanism 41 provides opposite power for the rotation of the third gear 40 and the fourth gear 42.

[0058] The bevel gear mechanism 41 of the present invention includes a first bevel gear 43, a second bevel gear 44, and a third bevel gear 45. The first bevel gear 43 is coaxially and fixedly connected to the surface of the connecting shaft. The second bevel gear 44 is rotatably connected to the support seat body 35 and meshes with the first bevel gear 43. The third bevel gear 45 meshes with the second bevel gear 44 and is coaxially and fixedly connected to the fourth gear 42.

[0059] The present invention includes the following steps:

[0060] Step 1: The third driving motor 39 is started to drive the third gear 40 to rotate. The fourth gear 42 is driven to rotate through the bevel gear mechanism 41. The two arc-shaped clamping plates 37 are driven to rotate 90 degrees in opposite directions by the third gear 40 and the fourth gear 42 rotating in opposite directions. The large pipe is fixed by the two arc-shaped clamping plates 37.

[0061] Step 2: The second driving motor 47 is started to drive the second gear 16 to rotate, driving the second gear ring 15 to rotate, so that the adjusting rod 20 is displaced in the arc-shaped groove 21, and thus the adjusting plate 19 and the arc-shaped grinding disc 18 move towards the center position of the first collar plate 14. The four arc-shaped grinding discs 18 are pressed against the surfaces of the two large pipes.

[0062] Step 3: The first driving motor 11 is started to drive the first gear 12 to rotate, thereby driving the first gear ring 13 to rotate, driving the rotating ring 9 to rotate, further driving the first collar plate 14 and the second gear ring 15 to rotate, and further driving the four arc-shaped grinding discs 18 to rotate. The two ends of the surface of the welding joint of the large pipe are ground by the four arc-shaped grinding discs 18.

[0063] Step 4: The first driving motor 11 is started to drive the first gear 12 to rotate, thereby driving the first gear ring 13 to rotate, driving the rotating ring 9 to rotate, driving the support vertical plate 22 to rotate, driving the support horizontal plate 23 and the welding head 24 to rotate, and welding the butting position of the two large pipes. Under the action of the arc-shaped corrugated groove 34, the connecting rod 33 makes a reciprocating movement, so that the support horizontal plate 23 and the welding head 24 make a reciprocating movement to ensure the welding effect.

[0064] The principle of the present invention:

[0065] During use, the two large pipes are respectively placed on the two support seat bodies 35 through an external device, and the two large pipes are pushed so that the ends of the two large pipes move into the first collar plate 14 and abut against each other. The third driving motor 39 is started to drive the third gear 40 to rotate. The fourth gear 42 is driven to rotate through the bevel gear mechanism 41. The rotation directions of the third gear 40 and the fourth gear 42 are opposite. The two arc-shaped clamping plates 37 are driven to rotate 90 degrees in opposite directions by the third gear 40 and the fourth gear 42 rotating in opposite directions. The large pipe is fixed by the two arc-shaped clamping plates 37.

[0066] After being fixed, the second driving motor 47 starts, drives the second gear 16 to rotate, drives the second toothed ring 15 to rotate, enables the adjusting rod 20 to displace within the arc-shaped groove 21, so that the adjusting plate 19 and the arc-shaped grinding disc 18 move towards the center position of the first collar plate 14, and press against the surfaces of the two large pipes through the four arc-shaped grinding discs 18 in a fitting manner;

[0067] The first driving motor 11 starts, drives the first gear 12 to rotate, thereby drives the first toothed ring 13 to rotate, thereby drives the rotating ring 9 to rotate, further drives the first collar plate 14 and the second toothed ring 15 to rotate, and further drives the four arc-shaped grinding discs 18 to rotate, and grinds the two ends of the surface of the welding joint of the large pipe through the four arc-shaped grinding discs 18;

[0068] After the grinding is completed, the second driving motor 47 starts to reverse, the arc-shaped grinding disc 18 moves away from the large pipe, the first driving motor 11 starts, drives the first gear 12 to rotate, thereby drives the first toothed ring 13 to rotate, thereby drives the rotating ring 9 to rotate, thereby drives the support vertical plate 22 to rotate, drives the support horizontal plate 23 and the welding head 24 to rotate, welds the position where the two large pipes are butted, and under the action of the arc-shaped corrugated groove 34, enables the connecting rod 33 to perform a reciprocating back-and-forth movement, so that the support horizontal plate 23 and the welding head 24 perform a reciprocating back-and-forth movement to ensure the welding effect.

[0069] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various modifications and decorations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A device for welding large-diameter pipe bodies, characterized in that: It includes a machine table (1), on which a large pipe fixing mechanism (2) and a grinding and welding mechanism (3) are provided. There are two groups of the large pipe fixing mechanisms (2), which are symmetrically arranged on the machine table (1). The grinding and welding mechanism (3) is arranged between the two groups of large pipe fixing mechanisms (2). The grinding and welding mechanism (3) includes a grinding and welding driving mechanism (4), a multi-directional grinding disc fitting mechanism (5), a welding mechanism (6), and a welding mechanism reciprocating pushing mechanism (7). The grinding and welding driving mechanism (4) is fixedly connected to the machine table (1). The multi-directional grinding disc fitting 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). The welding mechanism reciprocating pushing mechanism (7) is arranged on the machine table (1) and is rotatably connected to the multi-directional grinding disc fitting mechanism (5). The 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 table (1). 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 table (1), and the other end is arranged on the rotating ring (9). The gear mechanism (10) includes a driving motor one (11), a gear one (12), and a gear ring one (13). A placement groove is provided on the machine table (1). The driving motor one (11) is arranged in the placement groove and is fixedly connected to the machine table (1). The gear one (12) is coaxially and fixedly connected to the output end of the driving motor one (11). The gear ring one (13) is fixedly sleeved on the surface of the rotating ring (9) and meshes with the gear one (12). The multi-directional grinding disc fitting mechanism (5) includes a sleeve ring plate one (14) and a gear ring two (15). The sleeve ring plate one (14) is fixedly connected to the end of the rotating ring (9). The gear ring two (15) is rotatably connected to the end of the sleeve ring plate one (14) away from the rotating ring (9). The welding mechanism (6) includes a support vertical plate (22), a support horizontal plate (23), and a welding head (24). The support vertical plate (22) is fixedly connected to the surface of the rotating ring (9). The support horizontal plate (23) movably passes through the support vertical plate (22). The welding head (24) is fixedly connected to the support horizontal plate (23). A through groove (25) is provided on the rotating ring (9). The end of the welding head (24) away from the support horizontal plate (23) is arranged in the through groove (25) and is arranged between two pipe bodies. The welding mechanism reciprocating pushing mechanism (7) includes a support seat mechanism (26) and an adjustment head mechanism (27). The support seat mechanism (26) is fixedly connected to the machine table (1) and is rotatably connected to the gear ring two (15). The adjustment head mechanism (27) is annularly slidable on the support seat mechanism (26). The support base mechanism (26) includes a second support base (28), a second collar plate (29), and an annular guide rail plate (30). The second support base (28) is fixedly connected to the machine table (1). The second collar plate (29) is fixedly connected to the second support base (28) and is rotatably connected to the second gear ring (15). The annular guide rail plate (30) is fixedly sleeved on the second collar plate (29). The adjusting head mechanism (27) includes an arc-shaped block (31), an adjusting head (32), and a connecting rod (33). The arc-shaped block (31) is annularly slid on the annular guide rail plate (30) through a sliding mechanism. A through groove is provided on the arc-shaped block (31). The adjusting head (32) is arranged in the through groove and is slidably connected to the arc-shaped block (31) through a second sliding mechanism. The connecting rod (33) fixedly passes through the adjusting head (32), and its upper end is connected to the support cross plate (23). An arc-shaped corrugated groove (34) is provided on the annular guide rail plate (30). The lower end of the connecting rod (33) is arranged in the arc-shaped corrugated groove (34).

2. The device for welding large-diameter pipe bodies according to claim 1, wherein: The multi-directional grinding disc fitting mechanism (5) further includes a second gear (16), a second driving motor (47), and a grinding adjustment mechanism (17). The second gear (16) meshes with the second gear ring (15). The second driving motor (47) is fixedly connected to the first collar plate (14). The second gear (16) is connected to the output end of the second driving motor (47). The grinding adjustment mechanism (17) is connected to the first collar plate (14) and the second gear ring (15). Four groups of the grinding adjustment mechanisms (17) are arranged in a circumferential array with the center position of the first collar plate (14) as the reference. 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 inside the first collar plate (14) and fits on the surface of the pipe body. The adjustment plate (19) is fixedly connected to the arc-shaped grinding disc (18) and movably passes through the first collar plate (14). The adjustment rod (20) is fixedly connected to the adjustment plate (19). The arc-shaped groove (21) is provided on the first 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).

3. The device for welding large-diameter pipe bodies according to claim 2, wherein: The large pipe fixing mechanism (2) includes a support base body (35), a semi-circular groove (36), an arc-shaped clamping plate (37), and a power mechanism (38). The support base body (35) is fixedly connected to the machine table (1). Two semi-circular grooves (36) are symmetrically provided on the support base body (35). Two groups of arc-shaped clamping plates (37) are respectively arranged in the two semi-circular grooves (36) and are annularly slidably connected to the support base body (35). The power mechanism (38) meshes with the arc-shaped clamping plate (37) and is fixedly connected to the support base body (35).

4. A device for welding large-diameter pipe bodies according to claim 3, characterized in that: The power mechanism (38) includes a third driving motor (39), a third gear (40), a bevel gear mechanism (41), and a fourth gear (42). The third driving motor (39) is fixedly connected to the support base body (35). A placement groove (46) communicating with the semi-circular groove (36) is provided on the support base body (35), and the placement grooves (46) are symmetrically distributed based on the central position of the support base body (35). The third gear (40), the fourth gear (42), and the bevel gear mechanism (41) are arranged in the placement groove (46). The third gear (40) is fixedly connected to the output end of the third driving motor (39) through a coupling. The third gear (40) meshes with one of the arc-shaped clamping plates (37). The bevel gear mechanism (41) is rotatably connected to the support base body (35), and its two ends are respectively fixedly connected to the third gear (40) and the fourth gear (42). The fourth gear (42) is rotatably connected to the support base body (35).

5. The device for welding large-diameter pipe bodies according to claim 4, characterized in that: The bevel gear mechanism (41) includes a first bevel gear (43), a second bevel gear (44), and a third bevel gear (45). The first bevel gear (43) is coaxially and fixedly connected to the surface of the connecting shaft. The second bevel gear (44) is rotatably connected to the support base body (35) and meshes with the first bevel gear (43). The third bevel gear (45) meshes with the second bevel gear (44) and is coaxially and fixedly connected to the fourth gear (42).

6. A method for welding large-diameter pipe bodies, applied to the device for welding large-diameter pipe bodies described in claim 5, characterized in that, The method includes the following steps: Step 1: The third driving motor (39) is started to drive the third gear (40) to rotate. The fourth gear (42) is driven to rotate through the bevel gear mechanism (41). The two arc-shaped clamping plates (37) are driven to rotate 90 degrees in opposite directions by the third gear (40) and the fourth gear (42) rotating in opposite directions. The large pipe is fixed by the two arc-shaped clamping plates (37). Step 2: The second driving motor (47) is started to drive the second gear (16) to rotate, driving the second toothed ring (15) to rotate, so that the adjusting rod (20) displaces in the arc-shaped groove (21), thereby causing the adjusting plate (19) and the arc-shaped grinding disc (18) to move towards the central position of the first collar plate (14). The four arc-shaped grinding discs (18) are pressed against the surfaces of the two large pipes in a fitting manner. Step 3: The first driving motor (11) is started to drive the first gear (12) to rotate, thereby driving the first toothed ring (13) to rotate, thereby driving the rotating ring (9) to rotate, and further driving the first collar plate (14) and the second toothed ring (15) to rotate, and further driving the four arc-shaped grinding discs (18) to rotate. The surfaces at both ends of the welded joint of the large pipe are ground by the four arc-shaped grinding discs (18). Step 4: The first driving motor (11) is started to drive the first gear (12) to rotate, thereby driving the first toothed ring (13) to rotate, thereby driving the rotating ring (9) to rotate, thereby driving the support vertical plate (22) to rotate, driving the support horizontal plate (23) and the welding head (24) to rotate, welding the butting position of the two large pipes. Under the action of the arc-shaped corrugated groove (34), the connecting rod (33) performs a reciprocating back-and-forth movement, thereby causing the support horizontal plate (23) and the welding head (24) to perform a reciprocating back-and-forth movement.

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