A butt joint auxiliary device for steel pipes

Abstract

The application discloses a steel pipe butt joint auxiliary device and belongs to the technical field of steel pipe butt joint, which comprises a workbench, two groups of clamping units arranged on the workbench, two clamping units for clamping two steel pipes in the radial direction, a moving unit arranged on the workbench and used for driving one clamping unit to move in the horizontal direction, and two positioning units connected with the two moving units. The clamping units are used for clamping the steel pipes in the radial direction, and the two positioning units are used for positioning the axial directions of the two steel pipes, so that the situation that the butt joint end faces of the clamped steel pipes are too long or too short can be prevented, the welding position of the steel pipes can be prevented from being frequently changed, the complexity of welding can be reduced, the welding effect can be greatly improved, the steel pipes can be prevented from shaking and slightly tilting, the butt joint displacement of the steel pipes, that is, the misalignment phenomenon, can be avoided, the butt joint effect of the steel pipes is further improved, and the subsequent welding quality of the steel pipes is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of steel pipe butt welding technology, and more specifically, to an auxiliary device for steel pipe butt welding. Background Technology

[0002] Steel pipes need to be connected to form a continuous pipeline system. Among them, steel pipe welding is a common and strong method of steel pipe connection. When welding steel pipes, two steel pipes need to be butt-jointed to ensure that their axes are aligned in order to achieve the required effect of steel pipe welding.

[0003] The existing patent with publication number CN222680063U discloses a steel pipe docking device, including a workbench, two sets of clamping mechanisms mounted on the workbench, and a drive mechanism for moving the two sets of clamping mechanisms. Each set of clamping mechanisms includes a cylinder, a first V-shaped clamping block, and a second V-shaped clamping block. The output shaft of the cylinder is connected to the first V-shaped clamping block. A clamping part for placing steel pipes is formed between the first V-shaped clamping block and the second V-shaped clamping block. Two steel pipes are clamped by the two sets of clamping mechanisms respectively. The distance between the first V-shaped clamping block and the second V-shaped clamping block is adjusted by the cylinder. Different distances between the first V-shaped clamping block and the second V-shaped clamping block result in different diameters of the clamped steel pipes. Therefore, this utility model can clamp steel pipes of different diameters.

[0004] However, the existing docking device still has shortcomings. The existing clamping mechanism only clamps the steel pipe radially and does not set the corresponding axial positioning. This may cause misalignment of the docking end face of one steel pipe that is too long or one that is too short during the steel pipe clamping process, which will lead to frequent changes in the welding position and affect the welding effect. In addition, the slight tilt of the steel pipe may cause misalignment of the steel pipe docking, that is, misalignment, resulting in poor docking effect and greatly affecting the subsequent steel pipe welding quality.

[0005] Therefore, it is necessary to provide an auxiliary device for steel pipe docking to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a steel pipe docking auxiliary device to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A steel pipe butt welding auxiliary device for butt welding two steel pipes, comprising: The workbench is equipped with two sets of clamping units, which respectively clamp the two steel pipes radially. A moving unit, disposed on the worktable, is used to drive one of the clamping units to move horizontally. Two positioning units are respectively connected to the two moving units, and the two positioning units are used to perform axial positioning on the two steel pipes respectively.

[0008] Furthermore, a transmission groove is provided on the worktable, and the moving unit includes: A movable seat is slidably disposed in the transmission groove, and one of the clamping units is disposed on the movable seat. The inner walls on both sides of the transmission groove are rotatably provided with lead screws that are threadedly connected to the movable seat. A driving component is provided on the worktable, and the output end of the driving component is connected to the lead screw. A guide rod that slides through the moving seat is provided between the two sides of the transmission groove.

[0009] Furthermore, the clamping unit includes: The bracket and two symmetrical clamps are provided, each of which is equipped with an adjustment mechanism and two clamping plates. The adjustment mechanism is used to adjust the angle of the two clamping plates. A lifting mechanism, mounted on the bracket, is used to lift the clamp above it.

[0010] Furthermore, the adjustment mechanism includes: Two rotating shafts are rotatably mounted on the inner wall of the clamping seat. Each of the two rotating shafts is equipped with a connecting plate and a gear. The two connecting plates are respectively connected to the two clamping plates, and the two gears mesh with each other. An operating component, located on the clamp, is used to drive one of the rotating shafts to rotate.

[0011] Furthermore, the operating components include: An operating lever is rotatably mounted on the inner wall of the clamp. A worm gear is mounted on the operating lever, and a worm wheel that meshes with the worm gear is mounted on one of the rotating shafts.

[0012] Furthermore, the lifting mechanism includes: A screw is threadedly connected to the top of the bracket, and the lower end of the screw is rotatably connected to a mounting plate that is connected to the clamp above. A limiting rod is provided on the mounting plate and slides through the top of the bracket.

[0013] Furthermore, the positioning unit includes: A strut is provided on the outer wall of the clamp, a connecting rod is movably connected through the strut, a positioning plate and a stop are provided on the connecting rod, and an elastic element is provided between the stop and the strut; A triggering mechanism, located on the clamp, is used to drive the positioning plate on another clamp to move downward.

[0014] Furthermore, the triggering mechanism includes: A fixing frame is provided on the outer wall of the clamp, and a first wedge block is provided on the fixing frame; An adapter block is located at the lower end of the connecting rod, and the adapter block is provided with a second wedge block that is adapted to the first wedge block.

[0015] Furthermore, the outer wall of the clamp is provided with a slot that is adapted to the connecting plate, and the slot is used to avoid the connecting plate.

[0016] Furthermore, the ends of the operating lever and the screw are respectively provided with a first handle and a second handle.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution uses a clamping unit to radially clamp the steel pipes and two positioning units to axially position the two steel pipes respectively. This ensures that the end faces of the two steel pipes are in the designated positions, preventing one end face from being too long or too short. The positioning units ensure that the end faces of the two steel pipes are in a constant position when they meet, avoiding frequent changes in the welding position, reducing welding complexity, and greatly improving the welding effect. Furthermore, the axial positioning of the steel pipes by the positioning units prevents the steel pipes from shaking or slightly tilting, avoiding misalignment or misjoint phenomena, further improving the steel pipe joining effect and significantly improving the subsequent steel pipe welding quality. It has high practicality. Furthermore, during the gradual connection of the steel pipes, the positioning unit will release the axial positioning of the steel pipes to avoid interference between the two steel pipes. It has a high degree of automation, requires no additional drive equipment or manual operation, saves manpower and time, greatly reduces costs, and has good performance.

[0018] 2. In this solution, when encountering extreme diameters (such as extremely thin or extremely thick steel pipes), the angle of the two clamping plates can be adjusted by the adjustment mechanism, so that the included angle between the two clamping plates is suitable for the steel pipe that needs to be clamped at this time. Through this dynamic adjustment, the limitations of the original fixed included angle can be broken, significantly improving the adaptability and clamping stability of extreme diameter steel pipes, further increasing the clamping range of steel pipes of different diameters, with high flexibility, and can be widely used. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the docking auxiliary device of the present invention in the state of clamping the steel pipe; Figure 2 This is a schematic diagram of the docking auxiliary device of the present invention in its non-clamping state; Figure 3 for Figure 2 Enlarged structural diagram at point A in the diagram; Figure 4This is a side view of the docking auxiliary device of the present invention. Figure 5 This is a schematic diagram of the clamp and its components of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point B in the diagram; Figure 7 This is a schematic diagram of the internal structure of the clamp of the present invention; Figure 8 This is a schematic diagram of the structure of the docking auxiliary device of the present invention after the steel pipe is docked. Figure 9 for Figure 8 A magnified structural diagram at point C in the diagram.

[0020] Explanation of the labels in the diagram: 1. Steel pipe; 2. Workbench; 3. Clamping unit; 31. Bracket; 32. Clamping seat; 33. Adjustment mechanism; 331. Rotating shaft; 332. Connecting plate; 333. Gear; 334. Operating component; 3341. Operating lever; 3342. Worm gear; 3343. Worm wheel; 34. Clamping plate; 35. Lifting mechanism; 351. Screw; 352. Mounting plate; 353. Limiting rod; 4. Moving unit; 41. Moving seat; 42. Lead screw; 43. Driving component; 44. Guide rod; 5. Positioning unit; 51. Support rod; 52. Connecting rod; 53. Positioning plate; 54. Stop block; 55. Elastic component; 56. Triggering mechanism; 561. Fixed frame; 562. First wedge block; 563. Adapter block; 564. Second wedge block; 6. Transmission groove; 7. Slot; 8. First rotating handle; 9. Second rotating handle. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-9 A steel pipe butt welding auxiliary device for butt welding two steel pipes 1, comprising: The workbench 2 is equipped with two sets of clamping units 3, which respectively clamp the two steel pipes 1 radially. The moving unit 4 is located on the worktable 2 and is used to drive one of the clamping units 3 to move horizontally. Two positioning units 5 are connected to two moving units 4 respectively, and the two positioning units 5 are used to axially position the two steel pipes 1 respectively.

[0023] In use, two steel pipes 1 to be connected are placed on two sets of clamping units 3 on the workbench 2. The clamping units 3 radially clamp the steel pipes 1. Simultaneously, two positioning units 5 axially position the two steel pipes 1, limiting the ends of the steel pipes 1. This ensures that the end faces of the two steel pipes 1 are in the designated positions, preventing one end face from being too long or too short. The positioning units 5 ensure that the end faces of the two steel pipes 1 remain constant during connection, avoiding frequent changes in the welding position, reducing welding complexity, and greatly improving the welding effect. Furthermore, the axial positioning of the steel pipes 1 by the positioning units 5 prevents wobbling and slight tilting, avoiding misalignment and further improving the connection effect. This significantly enhances the subsequent welding quality of the steel pipes 1 and makes it highly practical.

[0024] After the steel pipe 1 is radially clamped and axially positioned by the clamping unit 3 and the positioning unit 5, the moving unit 4 drives one of the clamping units 3 to move in the horizontal direction, that is, drives one of the steel pipes 1 to move closer to the other steel pipe 1, so that the two steel pipes 1 end faces are finally connected. The connection process is stable and convenient, the connection position is stable, and the inconvenience and uncertainty caused by the offset of the welding position are avoided, resulting in good performance.

[0025] Furthermore, during the gradual docking of steel pipes 1, the positioning unit 5 will release the axial positioning of steel pipes 1 to avoid interference between the two steel pipes 1. When the movable clamping unit 3 is returned to its original position by the moving unit 4, the positioning unit 5 will gradually return to its initial state and wait for the next docking.

[0026] For preferred options, please refer to [link / reference]. Figure 1-4 and Figure 8 The worktable 2 has a transmission groove 6, and the moving unit 4 includes: The movable seat 41 is slidably disposed in the transmission groove 6, and one of the clamping units 3 is disposed on the movable seat 41. The inner walls on both sides of the transmission groove 6 are rotatably provided with lead screws 42 that are threadedly connected to the movable seat 41. The drive unit 43 is located on the worktable 2. The output end of the drive unit 43 is connected to the lead screw 42. A guide rod 44 that slides through the moving seat 41 is provided between the two sides of the transmission groove 6.

[0027] Specifically, the driving component 43 in this solution can be a servo motor. Starting the driving component 43 can drive the lead screw 42 to rotate. When the lead screw 42 rotates, it can drive the moving seat 41 to move along the guide rod 44, so that the moving seat 41 and the clamping unit 3 on it can move in the horizontal direction, and finally the steel pipe 1 clamped on this clamping unit 3 can move to dock with another steel pipe 1.

[0028] In this embodiment, preferably, please refer to 1-2. Figure 4-5 and Figure 7-8 The clamping unit 3 includes: The bracket 31 and two symmetrical clamps 32 are provided. Each clamp 32 is provided with an adjustment mechanism 33 and two clamping plates 34. The adjustment mechanism 33 is used to adjust the angle of the two clamping plates 34. The lifting mechanism 35 is mounted on the bracket 31 and is used to lift the upper clamp 32.

[0029] Specifically, during docking, the steel pipe 1 is placed between the two clamping plates 34 of the lower clamping seat 32, and then the upper clamping seat 32 and clamping plates 34 are lowered by the lifting mechanism 35, so that the two clamping plates 34 of the upper clamping seat 34 clamp the upper side of the steel pipe 1, thus achieving radial clamping and fixing of the steel pipe 1.

[0030] When clamping steel pipes 1 of various diameters, the lifting mechanism 35 can drive the upper clamping plate 34 to descend to different heights to clamp the steel pipes 1. This means that the distance between the upper and lower clamping plates 34 can be adjusted according to various specifications of steel pipes. It has a wide range of applications, high flexibility, and does not require repeated replacement of different clamping plates 34.

[0031] When clamping a steel pipe that is larger or much smaller than the angle between the two clamping plates 34, if an extreme diameter (such as an extremely thin or extremely thick steel pipe) is encountered, the angle between the two clamping plates 34 can be adjusted by the adjusting mechanism 33 so that the angle between the two clamping plates 34 is suitable for the steel pipe 1 that needs to be clamped at this time.

[0032] For example: 1. When clamping an extremely thin steel pipe 1, the included angle between the two clamping plates 34 can be reduced. Reason: The outer diameter of the ultra-fine steel pipe 1 is small. If the two clamping plates 34 maintain the original large included angle, the contact point between the steel pipe 1 and the clamping plate 34 will be very close to the inside of the groove of the two lower clamping plates 34, that is, it will be covered by the two lower clamping plates 34. Then, when the upper clamping plate 34 descends, it will be blocked by the lower clamping plate 34, that is, it cannot clamp the ultra-fine steel pipe 1, thus failing to achieve the clamping effect.

[0033] After adjustment: After reducing the angle, the inner walls of the two clamping plates 34 will be more compact, and the contact point with the ultra-thin steel pipe 1 will move to the outer end of the clamping plate 34, increasing the contact area (even forming a small area of ​​surface contact), thus ensuring that the upper clamping plate 34 can clamp the steel pipe 1 after it descends, preventing slippage.

[0034] 2. When clamping an extremely thick steel pipe 1, the included angle between the two clamping plates 34 can be increased. Reason: The outer diameter of the extremely thick steel pipe 1 is large. If the two clamping plates 34 maintain the original small included angle, the outer wall of the steel pipe 1 may not be able to completely fit the inner wall of the clamping block, and will only contact the outer end of the clamping plate 34, which may easily cause indentation on the surface of the steel pipe 1, or even cause it to detach due to insufficient clamping force.

[0035] After adjustment: After increasing the angle, the openings of the two clamping plates 34 are wider, and the inner wall of the clamping plate 34 can fit more closely to the outer wall of the thick steel pipe 1, forming a larger contact area, making the clamping force distribution more uniform, avoiding indentation, and stably supporting the heavy steel pipe 1.

[0036] In summary, this dynamic adjustment can overcome the limitations of the original fixed angle, significantly improve the adaptability and clamping stability of steel pipes with extreme diameters, further increase the clamping range of steel pipes with different diameters, and is highly flexible and can be widely used.

[0037] For preferred options, please refer to [link / reference]. Figure 5-7 The regulating mechanism 33 includes: Two rotating shafts 331 are rotatably mounted on the inner wall of the clamping seat 32. Each of the two rotating shafts 331 is provided with a connecting plate 332 and a gear 333. The two connecting plates 332 are respectively connected to the two clamping plates 34, and the two gears 333 mesh with each other. The operating component 334 is located on the clamp 32 and is used to drive one of the rotating shafts 331 to rotate.

[0038] Specifically, the operating component 334 drives one of the rotating shafts 331 to rotate. Then, the gear 333 on this rotating shaft 331 rotates, which in turn drives the other gear 333 and the rotating shaft 331 to rotate. Due to the transmission of the two gears 333, the two rotating shafts 331 rotate in opposite directions. The rotating shafts 331 drive the connecting plate 332 and the clamping plate 34 to rotate. Consequently, the two clamping plates 34 on each clamping seat 32 rotate in opposite directions. That is, the two clamping plates 34 will rotate to open in a direction away from each other or rotate to close in a direction close to each other. Thus, the angle between the two clamping plates 34 can be adjusted as needed.

[0039] For preferred options, please refer to [link / reference]. Figure 5-7 The operating component 334 includes: The operating lever 3341 is rotatably mounted on the inner wall of the clamp 32. A worm gear 3342 is mounted on the operating lever 3341, and a worm wheel 3343 that meshes with the worm gear 3342 is mounted on one of the rotating shafts 331.

[0040] With this design, rotating the operating rod 3341 will drive the worm gear 3342 to rotate, and the worm gear 3342 will drive the worm wheel 3343 and the shaft 331 connected to it to rotate. Through the self-locking property of the worm gear 3342 and the worm wheel 3343, the stability of the shaft 331 after rotation can be guaranteed, that is, the stability of the two clamping plates 34 after the angle is adjusted can be guaranteed.

[0041] In this embodiment, preferably, please refer to [reference needed]. Figure 1-2 , Figure 4 and Figure 8 The lifting mechanism 35 includes: The screw 351 is threaded to the top of the bracket 31, and the lower end of the screw 351 is rotatably connected to the mounting plate 352 which is connected to the upper clamp 32. The limiting rod 353 is set on the mounting plate 352 and slides through the top of the bracket 31.

[0042] Specifically, under the rotation restriction of the limiting rod 353, and since the mounting plate 352 and the screw 351 are rotatably connected, by rotating the screw 351, the screw 351 will drive the mounting plate 352 to move up or down while rotating and rising or falling. The limiting rod 353 will also move accordingly. In turn, the movement of the mounting plate 352 will drive the clamp 32 and the clamping plate 34 to move up or down.

[0043] In this embodiment, preferably, please refer to [reference needed]. Figure 1-3 , Figure 5 and Figure 7-9 The positioning unit 5 includes: A strut 51 is located on the outer wall of the clamp 32. A connecting rod 52 is movably connected through the strut 51. A positioning plate 53 and a stop block 54 are provided on the connecting rod 52. An elastic element 55 is provided between the stop block 54 and the strut 51. The elastic element 55 in this scheme can be a spring or a damper. The triggering mechanism 56 is located on the clamp 32 and is used to drive the positioning plate 53 on another clamp 32 to move downward.

[0044] Specifically, when two steel pipes 1 are placed on the clamping plates 34 of the two clamps 32, the ends of the steel pipes 1 contact the positioning plates 53 on the support rod 51. At this time, the end faces of the two steel pipes 1 are blocked by the positioning plates 53 on both sides. That is, the positioning plates 53 position and restrict the axial movement of the steel pipes 1, which can prevent the steel pipes 1 from moving off-center and avoid misalignment of the two steel pipes 1, thus improving the welding effect and quality. Then, the steel pipes 1 are radially clamped by the clamping plate 34 above.

[0045] During the docking process, when the movable seat 41 moves its clamp 32 towards another clamp 32, the moving movable seat 41 will move its support rod 51 and triggering mechanism 56 together. Just as the two steel pipes 1 are about to dock, the triggering mechanism 56 on the moving movable seat 41 will cause the positioning plate 53 on the stationary movable seat 41 to move downwards. At this time, the elastic element 55 is compressed and deformed. Similarly, the triggering mechanism 56 on the stationary movable seat 41 will cause the positioning plate 53 on the moving movable seat 41 to move downwards, thus causing the two positioning plates 53 to move downwards and disengage from the end faces of the steel pipes 1. Finally, the end faces of the two steel pipes 1 will dock, preventing the positioning plates 53 from interfering with the steel pipes 1. When the movable seat 41 moves back to reset, the rebound force of the elastic element 55 will cause the positioning plate 53 to move upwards and reset, ready for the next steel pipe docking. The movement of the positioning plate 53 by the movable seat 41 during its movement is highly automated, requiring no additional drive equipment or manual intervention, saving time, labor, and costs, and providing excellent results.

[0046] In this embodiment, preferably, please refer to [reference needed]. Figure 2-3 , Figure 5 and Figure 7-9 The triggering mechanism 56 includes: A fixing frame 561 is provided on the outer wall of the clamp 32, and a first wedge block 562 is provided on the fixing frame 561; The adapter block 563 is located at the lower end of the connecting rod 52, and the adapter block 563 is provided with a second wedge block 564 that is adapted to the first wedge block 562.

[0047] Specifically, when the movable seat 41 moves, it will cause the first wedge 562 on it to move. When the moving first wedge 562 contacts the opposite second wedge 564, it will squeeze it downward. The second wedge 564 will then cause the adapter block 563, connecting rod 52 and positioning plate 53 to move downward. Similarly, the second wedge 564 on the moving movable seat 41 will gradually contact the opposite stationary first wedge 562. The downward movement of this second wedge 564 will also cause the positioning plate 53 on it to move downward. That is, eventually both positioning plates 53 will move downward and separate from the end faces of the two steel pipes 1, without affecting the docking.

[0048] In this embodiment, preferably, please refer to [reference needed]. Figure 5-7 The outer wall of the clamp 32 is provided with a slot 7 that is adapted to the connecting plate 332. The slot 7 is used to avoid the connecting plate 332.

[0049] With this design, when the rotating shaft 331 drives the connecting plate 332 and the clamping plate 34 to rotate, the slot 7 can avoid the connecting plate 332, which can prevent interference after the connecting plate 332 rotates to a certain angle.

[0050] In this embodiment, preferably, please refer to [reference needed]. Figure 1-2 , Figure 4-5 and Figure 7-8 The operating rod 3341 and the screw 351 are respectively provided with a first handle 8 and a second handle 9 at their ends. This design allows the rod 3341 to be rotated more easily via the first handle 8, and the screw 351 to be rotated more easily via the second handle 9.

[0051] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

[0052] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A steel pipe butt welding auxiliary device for butt welding two steel pipes (1), characterized in that, include: The workbench (2) is provided with two sets of clamping units (3), and the two clamping units (3) respectively clamp the two steel pipes (1) radially; A moving unit (4) is provided on the worktable (2) and is used to drive one of the clamping units (3) to move in the horizontal direction; Two positioning units (5) are connected to two moving units (4) respectively, and the two positioning units (5) are used to axially position the two steel pipes (1) respectively.

2. The steel pipe butt welding auxiliary device according to claim 1, characterized in that, The workbench (2) is provided with a transmission groove (6), and the moving unit (4) includes: The movable seat (41) is slidably disposed in the transmission groove (6), and one of the clamping units (3) is disposed on the movable seat (41). The inner walls on both sides of the transmission groove (6) are rotatably provided with screws (42) that are threadedly connected to the movable seat (41). A drive unit (43) is provided on the worktable (2). The output end of the drive unit (43) is connected to the lead screw (42). A guide rod (44) that slides through the moving seat (41) is provided between the two sides of the transmission groove (6).

3. The steel pipe butt welding auxiliary device according to claim 1, characterized in that, The clamping unit (3) includes: The bracket (31) and two mutually symmetrical clamps (32) are provided with an adjustment mechanism (33) and two clamping plates (34) on each clamp (32). The adjustment mechanism (33) is used to adjust the angle of the two clamping plates (34). The lifting mechanism (35) is located on the bracket (31) and is used to drive the clamp (32) above to lift.

4. The steel pipe butt welding auxiliary device according to claim 3, characterized in that, The adjustment mechanism (33) includes: Two rotating shafts (331) are rotatably mounted on the inner wall of the clamp (32). Each of the two rotating shafts (331) is provided with a connecting plate (332) and a gear (333). The two connecting plates (332) are respectively connected to the two clamping plates (34), and the two gears (333) mesh with each other. An operating component (334) is provided on the clamp (32) for driving one of the rotating shafts (331) to rotate.

5. The steel pipe butt welding auxiliary device according to claim 4, characterized in that, The operating component (334) includes: An operating lever (3341) is rotatably mounted on the inner wall of the clamp (32). A worm gear (3342) is mounted on the operating lever (3341), and a worm wheel (3343) meshing with the worm gear (3342) is mounted on one of the rotating shafts (331).

6. The steel pipe butt welding auxiliary device according to claim 5, characterized in that, The lifting mechanism (35) includes: A screw (351) is threaded to the top of the bracket (31), and the lower end of the screw (351) is rotatably connected to a mounting plate (352) connected to the clamp (32) above. A limiting rod (353) is provided on the mounting plate (352) and slides through the top of the bracket (31).

7. The steel pipe butt welding auxiliary device according to claim 3, characterized in that, The positioning unit (5) includes: A strut (51) is provided on the outer wall of the clamp (32). A connecting rod (52) is movably provided through the strut (51). A positioning plate (53) and a stop block (54) are provided on the connecting rod (52). An elastic element (55) is provided between the stop block (54) and the strut (51). A triggering mechanism (56) is provided on the clamp (32) for driving the positioning plate (53) on another clamp (32) to move downward.

8. The steel pipe butt welding auxiliary device according to claim 7, characterized in that, The triggering mechanism (56) includes: A fixing frame (561) is provided on the outer wall of the clamp (32), and a first wedge (562) is provided on the fixing frame (561). A transition block (563) is provided at the lower end of the connecting rod (52), and a second wedge block (564) adapted to the first wedge block (562) is provided on the transition block (563).

9. A steel pipe butt welding auxiliary device according to claim 4, characterized in that, The outer wall of the clamp (32) is provided with a slot (7) that is adapted to the connecting plate (332), and the slot (7) is used to avoid the connecting plate (332).

10. A steel pipe butt welding auxiliary device according to claim 6, characterized in that, The operating lever (3341) and the screw (351) are respectively provided with a first handle (8) and a second handle (9).

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