A butt welding device for stainless steel pipe lining for pipeline repair

Abstract

This utility model discloses a butt welding device for stainless steel pipe linings used in pipeline repair, relating to the field of pipeline repair technology. It aims to solve the technical problem of poor welding results for butt joints of stainless steel pipe linings when using manual hand-held argon arc welding machines. The device includes a transverse drive rod and an argon arc welding machine. This utility model designs a transverse drive rod, a first telescopic rod, a ring, an adjusting rod, a circumferential drive structure, a second telescopic rod, and a clamping seat. The circumferential drive structure drives the welding torch to rotate and adjust its position. The transverse drive rod then moves the welding torch horizontally, enabling continuous argon arc welding of the horizontal butt joints of the stainless steel pipe lining. Alternatively, the circumferential drive structure directly drives the welding torch in a circular motion, enabling continuous argon arc welding of the butt joints on the circumference of the stainless steel pipe lining, thus replacing the manual welding method.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, and more specifically, to a butt welding device for stainless steel pipe lining for pipeline repair. Background Technology

[0002] With rapid economic development and increasingly large-scale urban construction, urban municipal pipe networks are constantly facing the challenges of renewal and repair. Drainage pipes, due to their special structure and function, occupy an important position in urban drainage systems. However, with the increase in service life, long-term overload operation, corrosion, and human-caused damage, various factors have led to pipe damage, requiring repair. Stainless steel lining repair technology can effectively overcome the construction difficulties caused by construction environment, construction costs, and surrounding traffic restrictions in the repair of existing large-diameter urban drainage pipes. Stainless steel lining can also prevent corrosion of the inner wall of the pipe, reduce the roughness of the inner wall surface, and significantly increase water flow, thereby improving sewage discharge efficiency and enhancing the drainage function of the original pipe.

[0003] In the process of repairing stainless steel linings for large-diameter pipelines, several pre-fabricated sets of arc-shaped stainless steel pipe lining segments are usually sent into the pipeline. Then, these arc-shaped stainless steel pipe segments are assembled and spot-welded to form a circular stainless steel pipe lining. Subsequently, the workers need to perform continuous argon arc welding to fix the butt joints of the stainless steel lining. At this time, the butt welding device for stainless steel pipe lining segments, namely the argon arc welding machine, is required.

[0004] Currently, when using argon arc welding machines, workers directly hold the welding head to continuously weld the butt joints of stainless steel pipe linings. This welding method places extremely high demands on the welding skills of the personnel, and the continuity of the welding is difficult to guarantee, the stability is poor, and it is very easy to affect the welding quality, thereby affecting the overall effect of pipeline repair. In view of this, we propose a butt welding device for stainless steel pipe linings for pipeline repair. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a butt welding device for stainless steel pipe lining for pipeline repair, so as to solve the technical problem that the current argon arc welding machine uses manual hand welding, which results in poor welding effect for butt joints of stainless steel pipe lining.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a butt welding device for stainless steel pipe lining for pipeline repair, comprising a transverse drive rod and an argon arc welding machine. One end of the transverse drive rod is provided with two sets of first telescopic rods screwed onto its bottom. The other end of the transverse drive rod is provided with a ring. A circular block is provided at the center of the ring. The circular block is connected to the transverse drive rod. Three sets of connecting rods are arranged at equal intervals between the ring and the circular block. An adjusting rod is movably arranged inside the connecting rod. The adjusting rod extends to the outside of the ring. A circumferential drive structure is arranged on the transverse drive rod. A second telescopic rod is arranged on the circumferential drive structure. A clamping seat is arranged at the free end of the second telescopic rod. The welding torch of the argon arc welding machine is arranged on the clamping seat.

[0007] A disc is rotatably arranged on the side of the ring facing away from the transverse driving rod. The surface of the disc has three sets of equidistant arc-shaped adjustment ports. A set of round rods is inserted into each of the arc-shaped adjustment ports. The three sets of round rods are on the same circumference. A rectangular opening is opened on the side of the connecting rod facing the disc. One end of the round rod passing through the rectangular opening is connected to the bottom end of the corresponding adjustment rod. A second motor is embedded in the circular block. The rotation shaft of the output end of the second motor is connected to the center of the disc.

[0008] Preferably, the two sets of the first telescopic rods are arranged in a figure-eight shape, and a suction cup is arranged at the free end of the first telescopic rod.

[0009] Preferably, the lateral drive rod includes a tube body, a lead screw is rotatably arranged inside the tube body, the tube body has openings at both the front and rear, a matching block is arranged on the lead screw, and a first motor is arranged at the end of the tube body facing the first telescopic rod, and the rotation shaft of the output end of the first motor is connected to the lead screw.

[0010] Preferably, a docking block is arranged at one end of the circular block facing the tube body, the docking block has a rectangular docking hole, a fixing bolt is screwed onto the docking block, and a rectangular insert block symmetrical to the rectangular docking hole is arranged at one end of the tube body facing the docking block.

[0011] Preferably, the circumferential drive structure includes a ring seat, a drive assembly, and a mounting ring. The ring seat is fitted onto the tube body, and the end of the matching block that passes through the front and rear openings of the tube body is connected to the inner wall of the ring seat. The drive assembly includes a third motor, a circular gear, and a ring gear. The third motor is arranged on the ring seat, the circular gear is arranged on the rotating shaft at the output end of the third motor, the ring gear is rotatably arranged on one side of the ring seat, and the ring gear meshes with the circular gear. The mounting ring is arranged on the side of the ring gear facing away from the ring seat, and the second telescopic rod is arranged on the mounting ring.

[0012] Preferably, the mounting ring is provided with a concentric stabilizing ring, the stabilizing ring is sleeved on the pipe body, and the inner diameter of the stabilizing ring is the same as the outer diameter of the pipe body. Several sets of connecting blocks are arranged equidistantly between the stabilizing ring and the mounting ring.

[0013] Preferably, a slot is provided on one side of the top of the clamping seat, and a first arc-shaped groove is provided on one side inside the slot. Limiting rods are symmetrically inserted into the slot on the side opposite to the first arc-shaped groove, and a clamping plate is arranged at one end of the limiting rod located in the slot. A second arc-shaped groove is provided on the side of the clamping plate opposite to the limiting rod. An adjusting screw is screwed into the center of the slot on the side opposite to the first arc-shaped groove, and one end of the adjusting screw that passes through the slot is rotatably connected to the clamping plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the design of a transverse drive rod, a first telescopic rod, a ring, an adjusting rod, a circumferential drive structure, a second telescopic rod, and a clamping seat, allows for continuous argon arc welding of the butt joints of stainless steel liner pipes after spot welding and fixing several sets of arc-shaped stainless steel liner pipe segments inside a pipeline. First, the three adjusting rods around the ring are adjusted to press against the stainless steel liner pipe wall, fixing the ring and ensuring concentricity between the ring and the stainless steel liner pipe. At this point, one end of the transverse drive rod is supported and fixed, and the other end is supported and fixed using the first telescopic rod. Maintaining the transverse drive rod and the stainless steel liner pipe coaxiality, the operator can then fix the argon arc welding torch to the clamping seat. Finally, the operator adjusts the welding torch port to align with the stainless steel liner pipe segment using the second telescopic rod. The distance of the seam is controlled, and the welding torch can be rotated and its position adjusted via a circumferential drive structure. Then, the horizontal drive rod can move the welding torch horizontally, thus completing continuous argon arc welding of the horizontal butt joint of the stainless steel tube lining. Alternatively, the welding torch can be directly driven in a circular motion via the circumferential drive structure, thus completing continuous argon arc welding of the butt joint on the circumference of the stainless steel tube lining. This replaces the manual welding method, making the work more efficient and convenient, reducing the labor intensity of personnel, and ensuring more stable continuous argon arc welding of the butt joint of the stainless steel tube lining, guaranteeing the welding quality. This solves the technical problem of poor welding effect of the butt joint of the stainless steel tube lining when using manual hand welding in current argon arc welding machines. Therefore, this utility model has the advantage of better butt welding effect of stainless steel tube lining.

[0016] 2. In this utility model, a disc is rotatably arranged on one side of the ring. Three sets of arc-shaped adjustment ports are equidistantly opened on the disc, and a set of round rods is inserted into each set of arc-shaped adjustment ports. The round rods are connected to the bottom end of the corresponding adjustment rods, and the three sets of round rods are on the same circumference. Therefore, when the ring is fixed by adjusting the adjustment rods against the inner wall of the stainless steel liner, the operator can drive the disc to rotate via the second motor. Then, with the cooperation of the three sets of arc-shaped adjustment ports and the limiting cooperation of the rectangular openings, the three sets of round rods will move synchronously along the connecting rods, thus synchronously driving the three sets of adjustment rods to move synchronously. This achieves the desired effect. The simultaneous adjustment of the three sets of adjusting rods makes operation more convenient. Secondly, the equal extension and retraction of the three sets of adjusting rods can effectively ensure that after the ring is fixed inside the stainless steel liner tube, the ring can be precisely aligned with the stainless steel liner tube. This ensures that the subsequent transverse drive rod is coaxial with the stainless steel liner tube. As a result, when the subsequent transverse drive rod and the circumferential drive structure drive the argon arc welding torch to move horizontally and circumferentially, they can be precisely aligned and welded with the transverse or circumferential butt joint of the stainless steel tube liner. This further ensures the quality of continuous argon arc welding of the butt joint of the stainless steel tube liner. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the transverse drive rod structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the first structure of the ring and adjusting rod of this utility model;

[0020] Figure 4 This is a schematic diagram of the second structure of the ring and adjusting rod of this utility model;

[0021] Figure 5 This is a schematic diagram of the circumferential drive structure, the second telescopic rod, and the clamping seat structure of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Lateral drive rod; 101. Tube body; 102. First motor; 103. Lead screw; 104. Matching block; 105. Rectangular insert block; 2. First telescopic rod; 201. Suction cup; 3. Ring; 301. Round block; 302. Connecting rod; 303. Connecting block; 304. Rectangular connecting hole; 305. Fixing bolt; 306. Rectangular opening; 4. Adjusting rod; 5. Circumferential drive structure; 6. Second telescopic rod; 7. Clamping seat; 70 1. Groove; 702. First arc-shaped groove; 703. Clamping plate; 704. Second arc-shaped groove; 705. Limiting rod; 706. Adjusting screw; 8. Argon arc welding machine; 9. Disc; 901. Arc-shaped adjusting port; 10. Second motor; 11. Round rod; 12. Ring seat; 13. Drive assembly; 1301. Third motor; 1302. Circular gear; 1303. Ring gear; 14. Mounting ring; 1401. Connecting block; 1402. Stabilizing ring. Detailed Implementation

[0024] like Figures 1 to 5 As shown, this utility model relates to a butt welding device for stainless steel pipe lining for pipeline repair, including a transverse drive rod 1 and an argon arc welding machine 8. One end of the transverse drive rod 1 is provided with two sets of first telescopic rods 2 screwed onto the bottom, and the other end of the transverse drive rod 1 is provided with a ring 3. A circular block 301 is provided in the center of the ring 3 and is connected to the transverse drive rod 1. Three sets of connecting rods 302 are arranged at equal intervals between the ring 3 and the circular block 301. An adjusting rod 4 is movably arranged inside the connecting rod 302 and extends through to the outside of the ring 3. A circumferential drive structure 5 is arranged on the transverse drive rod 1, and a second telescopic rod 6 is arranged on the circumferential drive structure 5. A clamping seat 7 is arranged at the free end of the second telescopic rod 6, and the welding gun of the argon arc welding machine 8 is arranged on the clamping seat 7.

[0025] When performing continuous argon arc welding on the butt joint of the stainless steel inner liner after spot welding and fixing several sets of arc-shaped stainless steel tube segments inside the pipeline, firstly, the three sets of adjusting rods 4 around the circumference of the ring 3 can be adjusted to press against the wall of the stainless steel inner liner to fix the ring 3, ensuring that the ring 3 and the stainless steel inner liner are concentric. At this time, one end of the transverse drive rod 1 is supported and fixed, and then the other end of the transverse drive rod 1 is supported and fixed through the first telescopic rod 2. At this time, the transverse drive rod 1 is kept coaxial with the stainless steel inner liner. Then, the welding torch of the argon arc welding machine 8 can be fixed on the clamping seat 7, and then the welding torch can be adjusted through the second telescopic rod 6. The distance between the welding torch nozzle and the butt joint of the stainless steel tube lining is controlled, and the welding torch can be rotated and its position adjusted via the circumferential drive structure 5. Then, the horizontal drive rod 1 can move the welding torch horizontally, thus completing continuous argon arc welding of the horizontal butt joint of the stainless steel tube lining. Alternatively, the welding torch can be directly driven to move in a circular motion via the circumferential drive structure 5, thus completing continuous argon arc welding of the butt joint on the circumference of the stainless steel tube lining. This replaces the manual welding method, making the work more efficient and convenient, reducing the labor intensity of personnel, and ensuring more stable continuous argon arc welding of the butt joint of the stainless steel tube lining, guaranteeing the welding quality.

[0026] Specifically, the two sets of first telescopic rods 2 are arranged in a figure-eight shape, and suction cups 201 are arranged at the free ends of the first telescopic rods 2; the two sets of first telescopic rods 2 arranged in a figure-eight shape have a better supporting stability effect, and the free ends of the first telescopic rods 2 are fixed to the inner wall of the stainless steel tube by suction cups 201, which has better stability.

[0027] Furthermore, the transverse drive rod 1 includes a tube body 101, inside which a lead screw 103 is rotatably arranged. The tube body 101 has openings at both the front and rear. A matching block 104 is arranged on the lead screw 103. A first motor 102 is arranged at one end of the tube body 101 facing the first telescopic rod 2. The rotating shaft at the output end of the first motor 102 is connected to the lead screw 103. When the first motor 102 works, it drives the lead screw 103 to rotate. Then, under the limiting action of the openings at the front and rear of the tube body 101, the matching block 104 can perform horizontal displacement, which can drive the welding torch to move horizontally.

[0028] Furthermore, a docking block 303 is arranged at the end of the circular block 301 facing the pipe body 101. A rectangular docking hole 304 is opened on the docking block 303, and a fixing bolt 305 is screwed on the docking block 303. A rectangular insert block 105 symmetrical to the rectangular docking hole 304 is arranged at the end of the pipe body 101 facing the docking block 303. When the transverse drive rod 1 and the ring 3 are installed, after the ring 3 is fixed, the rectangular insert block 105 of the pipe body 101 is inserted into the rectangular docking hole 304 of the docking block 303 on one side of the circular block 301, and then the fixing bolt 305 is screwed in for fixation. This method can realize the separation of the ring 3 and the transverse drive rod 1, making it convenient for personnel to transport the transverse drive rod 1 and the ring 3 into the pipeline.

[0029] It is worth noting that the circumferential drive structure 5 includes a ring seat 12, a drive assembly 13, and a mounting ring 14. The ring seat 12 is fitted onto the tube body 101. The matching block 104 passes through one end of the front and rear openings of the tube body 101 and is connected to the inner wall of the ring seat 12. The drive assembly 13 includes a third motor 1301, a circular gear 1302, and a ring gear 1303. The third motor 1301 is arranged on the ring seat 12, the circular gear 1302 is arranged on the rotating shaft at the output end of the third motor 1301, and the ring gear 1303 is rotatably arranged on one side of the ring seat 12, and the ring gear 1303 meshes with the circular gear 1302. The mounting ring 14 is arranged on the side of the ring gear 1303 facing away from the ring seat 12, and the second telescopic rod 6 is arranged on the mounting ring 14. The ring seat 12 can move horizontally together with the matching block 104, thereby driving the welding torch to move horizontally. Then the third motor 1301 works, driving the circular gear 1302 to rotate. Then the circular gear 1302 drives the ring gear 1303 to rotate. The ring gear 1303 drives the mounting ring 14 to rotate. The mounting ring 14 drives the second telescopic rod 6 to rotate. Then the welding torch on the free end clamping seat 7 of the second telescopic rod 6 can move in a circular motion together.

[0030] It is worth mentioning that a concentric stabilizing ring 1402 is provided inside the mounting ring 14. The stabilizing ring 1402 is fitted onto the tube body 101, and the inner diameter of the stabilizing ring 1402 is the same as the outer diameter of the tube body 101. Several sets of connecting blocks 1401 are arranged equidistantly between the stabilizing ring 1402 and the mounting ring 14. The stabilizing ring 1402 is fixed inside the mounting ring 14 by the connecting blocks 1401, and then the stabilizing ring 1402 can rotate stably on the tube body 101, thereby ensuring the stability of the mounting ring 14 during its circumferential movement.

[0031] It is worth mentioning that a slot 701 is provided on one side of the top of the clamping seat 7, and a first arc-shaped groove 702 is provided on one side inside the slot 701. Limiting rods 705 are symmetrically inserted into the slot 701 on the side opposite to the first arc-shaped groove 702. A clamping plate 703 is arranged at one end of the limiting rod 705 located in the slot 701. A second arc-shaped groove 704 is provided on the side of the clamping plate 703 opposite to the limiting rod 705. An adjusting screw 706 is screwed into the center of the slot 701 on the side opposite to the first arc-shaped groove 702. The end of the adjusting screw 706 that passes through the slot 701 is rotatably connected to the clamping plate 703. When installing the welding torch, the welding torch is placed into the slot 701, and then the adjusting screw 706 is turned. The adjusting screw 706 drives the clamping plate 703 to move. Then, the second arc-shaped groove 704 on the clamping plate 703 cooperates with the first arc-shaped groove 702 to directly clamp the welding torch.

[0032] In an embodiment of this utility model, a disc 9 is rotatably arranged on the side of the ring 3 facing away from the transverse driving rod 1. The surface of the disc 9 has three sets of equidistant arc-shaped adjustment ports 901. A set of round rods 11 is inserted into each of the arc-shaped adjustment ports 901. The three sets of round rods 11 are circumferential. A rectangular opening 306 is opened on the side of the connecting rod 302 facing the disc 9. One end of the round rod 11 that passes through the rectangular opening 306 is connected to the bottom end of the corresponding adjustment rod 4. A second motor 10 is embedded in the circular block 301. The rotation shaft of the output end of the second motor 10 is connected to the center of the disc 9.

[0033] When the adjusting rod 4 is used to fix the ring 3 against the inner wall of the stainless steel liner tube, the operator can drive the disc 9 to rotate via the second motor 10. Then, with the cooperation of the three sets of arc-shaped adjusting ports 901 and the limiting cooperation of the rectangular opening 306, the three sets of round rods 11 will move synchronously along the connecting rod 302. This means that the three sets of adjusting rods 4 can move synchronously. Firstly, this allows for synchronous adjustment of the three sets of adjusting rods 4, making operation more convenient. Secondly, the equal extension and retraction of the three sets of adjusting rods 4 can effectively ensure that after the ring 3 is fixed inside the stainless steel liner tube, the ring 3 can be precisely aligned with the stainless steel liner tube. This ensures that the subsequent transverse drive rod 1 is coaxial with the stainless steel liner tube. As a result, when the subsequent transverse drive rod 1 and the circumferential drive structure 5 drive the argon arc welding machine 8 welding torch to move horizontally and circumferentially, they can be precisely aligned and welded with the transverse or circumferential butt joint of the stainless steel tube liner. This further ensures the quality of continuous argon arc welding of the butt joint of the stainless steel tube liner.

[0034] Working Principle: This embodiment provides a butt welding device for stainless steel pipe linings used in pipeline repair. First, when performing continuous argon arc welding on the butt joint of the stainless steel lining tubes after spot welding and fixing several sets of arc-shaped stainless steel pipe linings inside the pipeline, the three sets of adjusting rods 4 around the ring 3 can be adjusted to press against the wall of the stainless steel lining tube to fix the ring 3, ensuring that the ring 3 and the stainless steel lining tube are concentric. At this time, one end of the transverse drive rod 1 is supported and fixed, and then the other end of the transverse drive rod 1 is supported and fixed by the first telescopic rod 2. At this time, the transverse drive rod 1 is kept coaxial with the stainless steel lining tube. Then, the welding gun of the argon arc welding machine 8 can be fixed to the clamping seat 7. Then, the personnel adjust the distance between the welding torch port and the butt joint of the stainless steel tube liner using the second telescopic rod 6. The welding torch can be rotated and its position adjusted by the circumferential drive structure 5. The horizontal drive rod 1 can then move the welding torch horizontally, allowing for continuous argon arc welding of the horizontal butt joint of the stainless steel tube liner. Alternatively, the welding torch can be moved in a circular motion directly by the circumferential drive structure 5, allowing for continuous argon arc welding of the butt joint on the circumference of the stainless steel tube liner. This replaces the manual welding method, making the work more efficient and convenient, reducing the labor intensity of personnel, and ensuring more stable and high-quality continuous argon arc welding of the butt joint of the stainless steel tube liner.

[0035] Secondly, when the adjusting rod 4 is fixed to the inner wall of the stainless steel liner tube to fix the ring 3, the operator can drive the disc 9 to rotate through the second motor 10. Then, with the cooperation of the three sets of arc-shaped adjusting ports 901 and the limiting cooperation of the rectangular opening 306, the three sets of round rods 11 will move synchronously along the connecting rod 302. That is, the three sets of adjusting rods 4 can be moved synchronously. Firstly, it can realize the synchronous adjustment of the three sets of adjusting rods 4, making the operation more convenient. Secondly, the three sets of adjusting rods 4 can be stretched and fixed to the same extent, which can effectively ensure that after the ring 3 is fixed inside the stainless steel liner tube, the ring 3 can be accurately aligned with the stainless steel liner tube. That is, it can keep the subsequent transverse drive rod 1 and the stainless steel liner tube coaxial. This ensures that when the subsequent transverse drive rod 1 and the circumferential drive structure 5 drive the argon arc welding machine 8 welding torch to move horizontally and circumferentially, they can be precisely aligned and welded with the transverse or circumferential butt joint of the stainless steel tube liner. This further ensures the quality of continuous argon arc welding of the butt joint of the stainless steel tube liner.

[0036] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A butt welding device for stainless steel pipe lining for pipeline repair, characterized in that, The device includes a transverse drive rod (1) and an argon arc welding machine (8). One end of the transverse drive rod (1) is provided with two sets of first telescopic rods (2) screwed onto the bottom. The other end of the transverse drive rod (1) is provided with a ring (3). A circular block (301) is provided in the center of the ring (3). The circular block (301) is connected to the transverse drive rod (1). Three sets of connecting rods (302) are arranged at equal intervals between the ring (3) and the circular block (301). An adjusting rod (4) is movably arranged inside the connecting rod (302). The adjusting rod (4) extends through to the outside of the ring (3). A circumferential drive structure (5) is arranged on the transverse drive rod (1). A second telescopic rod (6) is arranged on the circumferential drive structure (5). A clamping seat (7) is arranged at the free end of the second telescopic rod (6). The welding torch of the argon arc welding machine (8) is arranged on the clamping seat (7). The ring (3) has a disc (9) arranged rotatably on the side opposite to the transverse drive rod (1). The disc (9) has three sets of equidistant arc-shaped adjustment ports (901) on its surface. Each arc-shaped adjustment port (901) has a set of round rods (11) inserted inside it. The three sets of round rods (11) are on the same circumference. The connecting rod (302) has a rectangular opening (306) facing the side of the disc (9). One end of the round rod (11) that passes through the rectangular opening (306) is connected to the bottom end of the corresponding adjustment rod (4). The second motor (10) is embedded in the block (301). The rotation shaft of the output end of the second motor (10) is connected to the center of the disc (9).

2. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 1, characterized in that, The two sets of the first telescopic rods (2) are arranged in a figure-eight shape, and the free end of the first telescopic rods (2) is provided with a suction cup (201).

3. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 1, characterized in that, The transverse drive rod (1) includes a tube (101), inside which a lead screw (103) is rotatably arranged. The tube (101) has openings at both the front and rear of its surface. A matching block (104) is arranged on the lead screw (103). A first motor (102) is arranged at one end of the tube (101) facing the first telescopic rod (2). The rotating shaft at the output end of the first motor (102) is connected to the lead screw (103).

4. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 3, characterized in that, The circular block (301) has a docking block (303) arranged at one end facing the tube body (101). The docking block (303) has a rectangular docking hole (304) and a fixing bolt (305) screwed onto the docking block (303). The tube body (101) has a rectangular insert (105) symmetrical to the rectangular docking hole (304) arranged at one end facing the docking block (303).

5. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 3, characterized in that, The circumferential drive structure (5) includes a ring seat (12), a drive assembly (13), and a mounting ring (14). The ring seat (12) is fitted onto the tube body (101). The matching block (104) passes through one end of the front and rear openings of the tube body (101) and is connected to the inner wall of the ring seat (12). The drive assembly (13) includes a third motor (1301), a circular gear (1302), and a ring gear (1303). The third motor (1301) is arranged on the ring seat (12). The circular gear (1302) is arranged on the rotating shaft at the output end of the third motor (1301). The ring gear (1303) is rotatably arranged on one side of the ring seat (12) and meshes with the circular gear (1302). The mounting ring (14) is arranged on the side of the ring gear (1303) facing away from the ring seat (12). The second telescopic rod (6) is arranged on the mounting ring (14).

6. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 5, characterized in that, The mounting ring (14) is provided with a concentric stabilizing ring (1402). The stabilizing ring (1402) is fitted onto the tube body (101), and the inner diameter of the stabilizing ring (1402) is the same as the outer diameter of the tube body (101). Several sets of connecting blocks (1401) are arranged equidistantly between the stabilizing ring (1402) and the mounting ring (14).

7. The butt welding device for stainless steel pipe lining for pipeline repair according to claim 1, characterized in that, The clamping seat (7) has a slot (701) on one side of its top. A first arc-shaped groove (702) is provided inside the slot (701) on one side. Limiting rods (705) are symmetrically inserted into the slot (701) on the side opposite to the first arc-shaped groove (702). A clamping plate (703) is arranged at one end of the limiting rod (705) located in the slot (701). A second arc-shaped groove (704) is provided on the side of the clamping plate (703) opposite to the limiting rod (705). An adjusting screw (706) is screwed into the center of the slot (701) on the side opposite to the first arc-shaped groove (702). The end of the adjusting screw (706) that passes through the slot (701) is rotatably connected to the clamping plate (703).

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