An automatic welding device suitable for non-excavation construction pipeline of distribution network

Abstract

The application relates to the technical field of welding devices, in particular to an automatic welding device suitable for distribution network trenchless construction pipelines, which comprises a fixing frame, a mounting frame, a movable frame and a positioning assembly, and welding assemblies and cleaning assemblies are arranged in the movable frame respectively. The welding assemblies and the cleaning assemblies can be freely transposed in the automatic welding device, the cleaning assemblies in the upper and lower movable frames are used to clean the welding positions of the construction pipelines, the oxidation layer, rust and coating pollutants on the surfaces of the construction pipelines are removed, the welding effect on the surfaces of the construction pipelines is improved, the welding assemblies are used to automatically weld the construction pipelines, the welding processing efficiency of the construction pipelines is remarkably improved, the automatic welding device has a small overall floor area, is very convenient to carry, does not need manual intervention during use, and the welding stability of the construction pipelines is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an automatic welding device suitable for trenchless pipeline construction in power distribution networks. Background Technology

[0002] Trenchless pipeline construction for power distribution networks refers to the method of laying or repairing pipelines without excavation during the construction or maintenance of power distribution networks. This construction method can reduce damage and restoration work to the ground environment, improve construction efficiency, and reduce the impact on traffic and residents' lives.

[0003] Currently, welding is being carried out on trenchless pipelines in power distribution networks. Because the work is done in an open environment, the surface of the pipelines has a large amount of oxide layer and rust. These factors will cause a decline in the welding quality. Therefore, it is necessary to clean the surface of the pipelines before welding. However, manual cleaning is not only inefficient, but also increases the labor intensity. It is quite troublesome to thoroughly clean the surface of the pipelines.

[0004] Therefore, we propose an automatic welding device suitable for trenchless pipeline construction in power distribution networks. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic welding device suitable for trenchless pipeline construction in power distribution networks, in order to solve the aforementioned technical defects.

[0006] To achieve the above effects, the technical solution adopted by the present invention is: an automatic welding device suitable for trenchless pipeline construction in power distribution networks, comprising:

[0007] A fixed frame, wherein four adjusting electric cylinders are fixedly installed around the top of the fixed frame, and the driving ends of the four adjusting electric cylinders pass through the fixed frame and extend to the bottom of the fixed frame, and a support block is fixedly installed at the bottom of the driving ends of the four adjusting electric cylinders.

[0008] The mounting frame has two first servo electric cylinders symmetrically fixedly arranged inside the fixed frame, and the mounting frame is also movably arranged on one side inside the fixed frame. The drive ends of the two first servo electric cylinders are respectively fixedly connected to the front and rear sides of the mounting frame.

[0009] The mounting frame has two movable frames that are slidably mounted on one side of the mounting frame via electric sliding tables, and each movable frame is equipped with welding components and cleaning components inside.

[0010] Positioning components are provided on the front and back sides of the interior of both the upper and lower movable frames;

[0011] The welding assembly includes a first drive frame, and the cleaning assembly includes a second drive frame. Each of the two movable frames has a movable groove inside, and the first drive frame and the second drive frame are slidably arranged inside each of the two movable grooves. A servo linear slide is fixedly arranged on one side of the inner wall of each of the two movable grooves, and one side of each servo linear slide is slidably connected to one side of each of the first drive frame and the second drive frame. A rotating frame is rotatably arranged inside each of the first drive frame and the second drive frame, and the opposite sides of the upper and lower rotating frames are movably connected through a socket.

[0012] Preferably, a drive block is fixedly installed on the top of the movable frame located above, and a drive motor is fixedly installed on one side of the drive block. A drive gear is rotatably installed inside the drive block, and the inside of the drive gear is fixedly connected to the output shaft of the drive motor.

[0013] Preferably, one side of the rotating frame is provided with an external gear ring that cooperates with the drive gear, and the surface of the external gear ring meshes with the surface of the drive gear for transmission.

[0014] Preferably, a second servo electric cylinder is fixedly installed inside the rotating frame located inside the first drive frame below, and an argon arc welding gun is fixedly installed at the drive end of the second servo electric cylinder. Several third servo electric cylinders are fixedly installed on the inner wall of the rotating frame located inside the two first drive frames, and a limit block is fixedly installed at the drive end of the several third servo electric cylinders. Several limit balls are rotatably installed on one side of the limit block.

[0015] Preferably, a fourth servo electric cylinder is fixedly installed on the inner wall of the rotating frame located inside the lower second drive frame, and a cleaning frame is fixedly installed on the drive end of the fourth servo electric cylinder, and a cleaning roller is rotatably installed inside the cleaning frame.

[0016] Preferably, connecting frames are fixedly provided on both sides of the cleaning frame, and connecting blocks are slidably provided at the bottom of the two connecting frames. An inner tooth groove is provided on one side of the second drive frame, and an inner ring groove is provided on the other side of the second drive frame. One side of the two connecting blocks is slidably connected to the inside of the inner tooth groove and the inner ring groove, respectively.

[0017] Preferably, a first transmission column is rotatably arranged inside the connecting frame located on the left side, and a second transmission column is movably arranged at the bottom end of the first transmission column. A helical gear is fixedly arranged at the top end of the first transmission column and at one end of the cleaning roller, and the surfaces of the two helical gears mesh with each other. One end of the second transmission column extends into the interior of the connecting block, and a driven gear is fixedly arranged at the bottom end of the second transmission column. One side of the driven gear passes through the connecting block and extends to the outside of the connecting block, and the surface of the driven gear meshes with the interior of the internal tooth groove for transmission.

[0018] Preferably, the positioning component includes a fifth servo cylinder, with two fifth servo cylinders fixedly installed on both sides inside the upper and lower movable frames, and positioning blocks fixedly installed on the drive ends of the four fifth servo cylinders.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This invention incorporates freely repositionable welding and cleaning components within an automatic welding device, enabling automatic cleaning and welding of the construction pipeline surface. This improves welding efficiency and quality. During automatic welding, two movable frames on one side of the mounting frame are first controlled to separate upwards and downwards. Then, the driving ends of two first servo cylinders push the mounting frame closer to one side of the construction pipeline. Finally, the upper and lower movable frames are controlled to approach the surface of the construction pipeline until their opposite sides contact each other. The cleaning components inside the upper and lower movable frames first clean the welding area of ​​the construction pipeline, removing oxide layers, rust, coatings, and other contaminants, improving the subsequent welding effect. Then, the welding components automatically weld the construction pipeline, significantly improving welding efficiency. Furthermore, the automatic welding device has a small footprint, is easy to carry, and requires minimal manual intervention, ensuring welding stability.

[0021] 2. When welding the surface of the construction pipeline, firstly, several third servo electric cylinders inside the rotating frame drive the limiting blocks closer to the surface of the construction pipeline until the limiting ball on one side of the limiting block contacts the surface of the construction pipeline. Then, the second servo electric cylinder drives the argon arc welding gun closer to the surface of the construction pipeline. The argon arc welding gun is used to perform argon arc welding on the welding position of the construction pipeline. Several limiting blocks and limiting balls are used to limit the rotation of the rotating frame inside the first drive frame, improving the stability of the rotating frame's rotation inside the first drive frame. This ensures the stability of the argon arc welding gun's rotation on the surface of the construction pipeline, improving the welding accuracy and welding stability of the construction pipeline.

[0022] 3. When cleaning impurities from the surface of the construction pipeline, the cleaning frame is brought closer to the surface of the construction pipeline by the drive end of the fourth servo electric cylinder until the surface of the cleaning roller contacts the surface of the construction pipeline. When the rotating frame inside the second drive frame is rotated by the drive gear, the driven gear at the bottom of the second transmission column on one side of the cleaning frame meshes with the inner wall of the internal tooth groove, causing the second transmission column to drive the first transmission column to rotate inside the connecting frame. Then, the cleaning roller inside the cleaning frame is driven to rotate by two meshing helical gears, so that the rotating cleaning roller rotates along the surface of the construction pipeline, realizing comprehensive and automated cleaning of the surface of the construction pipeline, providing a good welding environment for subsequent welding processing. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of an automatic welding device structure suitable for trenchless pipeline construction in power distribution networks, according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the fixing frame and the first servo electric cylinder structure according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the first drive frame and the second drive frame according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the movable frame according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the rotating frame and argon arc welding gun structure according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the rotating frame and cleaning frame structure according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the connecting frame and the first transmission column in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the cleaning frame and cleaning roller in an embodiment of the present invention.

[0032] In the diagram, 1. Fixed frame; 2. Adjusting electric cylinder; 3. Support block; 4. Mounting frame; 5. First servo electric cylinder; 6. Movable frame; 7. First drive frame; 8. Second drive frame; 9. Movable groove; 10. Servo linear slide; 11. Rotating frame; 12. Drive block; 13. Drive gear; 14. External gear ring; 15. Second servo electric cylinder; 16. Argon arc welding torch; 17. Third servo electric cylinder; 18. Limit block; 19. Fourth servo electric cylinder; 20. Cleaning frame; 21. Cleaning roller; 22. Connecting frame; 23. Connecting block; 24. Internal gear groove; 25. First transmission column; 26. Second transmission column; 27. Helical gear; 28. Driven gear; 29. ​​Fifth servo electric cylinder; 30. Positioning block. Detailed Implementation

[0033] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1:

[0035] Please see Figures 1 to 8 As shown, this embodiment discloses an automatic welding device suitable for trenchless pipeline construction in power distribution networks, comprising:

[0036] The fixed frame 1 has four adjustable electric cylinders 2 fixedly installed around its top. The drive ends of the four adjustable electric cylinders 2 all pass through the fixed frame 1 and extend to the bottom of the fixed frame 1. Support blocks 3 are fixedly installed at the bottom of the drive ends of the four adjustable electric cylinders 2. It should be noted that when using the automatic welding device, the fixed frame 1 is placed on one side of the construction pipeline, and the four support blocks 3 are used to support the fixed frame 1 as a whole. The height of the fixed frame 1 is adjusted by controlling the extension length of the drive ends of the four adjustable electric cylinders 2, so that the automatic welding device can be used to weld construction pipelines of different diameters.

[0037] Mounting bracket 4, two first servo electric cylinders 5 are symmetrically fixed inside the mounting bracket 1, and mounting bracket 4 is also movably installed on one side inside the mounting bracket 1. The drive ends of the two first servo electric cylinders 5 are fixedly connected to the front and rear sides of the mounting bracket 4 respectively.

[0038] The movable frame 6 and the mounting frame 4 are each equipped with two movable frames 6, which are slidably mounted on one side via electric sliding tables. Each movable frame 6 contains welding and cleaning components. During automatic welding of the construction pipeline, the two movable frames 6 on one side of the mounting frame 4 are first controlled to separate upwards and downwards respectively. Then, the two first servo cylinders 5 drive the mounting frame 4 towards one side of the construction pipeline. Finally, the two movable frames 6 are controlled to approach the surface of the construction pipeline until their opposite sides contact each other. The cleaning components inside the two movable frames 6 clean the surface of the construction pipeline at the welding position, removing oxide layers, rust, coatings, and other contaminants, improving the subsequent welding effect. Then, the welding components automatically weld the construction pipeline, significantly improving welding efficiency. Furthermore, the automatic welding device has a small footprint, is very portable, and requires minimal manual intervention, ensuring welding stability of the construction pipeline.

[0039] Positioning components are installed on both the front and rear sides of the upper and lower movable frames 6. Before welding the construction pipeline, the positioning components inside the upper and lower movable frames 6 are used to fix the position of the construction pipeline on both sides of the welding position, ensuring the stability of the construction pipeline during surface cleaning and welding, thereby improving the welding effect and ensuring welding accuracy.

[0040] Furthermore, current welding operations at trenchless power distribution pipelines are conducted in open environments, resulting in a significant amount of oxide and rust on the pipeline surface. These factors contribute to a decline in welding quality. Therefore, surface cleaning is necessary before welding. However, manual cleaning is inefficient, labor-intensive, and cumbersome. This invention addresses this by incorporating freely interchangeable welding and cleaning components into an automatic welding device, enabling automated cleaning and welding of the pipeline surface and improving both welding efficiency and quality.

[0041] As a further embodiment of the present invention, the welding assembly includes a first drive frame 7, and the cleaning assembly includes a second drive frame 8. Each of the two movable frames 6 has a movable groove 9 inside, and the first drive frame 7 and the second drive frame 8 are slidably disposed inside each of the two movable grooves 9. A servo linear slide 10 is fixedly disposed on one side of the inner wall of each of the two movable grooves 9, and one side of each servo linear slide 10 is slidably connected to one side of each of the first drive frame 7 and the second drive frame 8. The servo linear slide 10 inside the two movable frames 6 drives the first drive frame 7 and the second drive frame 8 inside the movable grooves 9 to move, thereby realizing the repositioning operation of the welding assembly and the cleaning assembly on the surface of the construction pipeline. This allows the automatic welding device to first clean the welding position on the surface of the construction pipeline before performing welding processing.

[0042] The first drive frame 7 and the second drive frame 8 are both rotatably equipped with a rotating frame 11 inside, and the two rotating frames 11 are movably connected to each other on opposite sides through a socket. The top of the upper movable frame 6 is fixedly equipped with a drive block 12, and a drive motor is fixedly equipped on one side of the drive block 12. A drive gear 13 is rotatably equipped inside the drive block 12, and the inside of the drive gear 13 is fixedly connected to the output shaft of the drive motor. An external gear ring 14 that cooperates with the drive gear 13 is provided on one side of the rotating frame 11, and the surface of the external gear ring 14 meshes with the surface of the drive gear 13 for transmission.

[0043] It should be noted that after the upper and lower movable frames 6 are aligned on opposite sides, the rotating frames 11 inside the upper and lower first drive frames 7 and second drive frames 8 are engaged on opposite sides. The two second drive frames 8 are moved to directly below the drive block 12 by the servo linear slide 10. At this time, the outer gear ring 14 on the surface of the upper rotating frame 11 meshes with the surface of the drive gear 13. The drive gear 13 is rotated by the drive motor on one side of the drive block 12. The meshing transmission between the drive gear 13 and the outer gear ring 14 allows the two rotating frames 11 to rotate inside the upper and lower second drive frames 8. This, in conjunction with the cleaning structure, thoroughly cleans the welding position of the construction pipeline. Similarly, after the surface cleaning of the welding position of the construction pipeline is completed, the two first drive frames 7 are moved to the welding position of the construction pipeline. The rotating frames 11 inside the first drive frames 7 are rotated by the drive gear 13. This, in conjunction with the welding structure, performs fully automatic welding processing on the welding position of the construction pipeline. No manual operation is required, which significantly improves the welding efficiency and welding quality of the construction pipeline.

[0044] Furthermore, a second servo electric cylinder 15 is fixedly installed inside the rotating frame 11 located inside the first drive frame 7 below, and an argon arc welding gun 16 is fixedly installed at the drive end of the second servo electric cylinder 15. Several third servo electric cylinders 17 are fixedly installed on the inner wall of the rotating frame 11 located inside the two first drive frames 7, and a limit block 18 is fixedly installed at the drive end of the several third servo electric cylinders 17. Several limit balls are rotatably installed on one side of the limit block 18.

[0045] It should be noted that when welding the surface of the construction pipeline, firstly, the driving ends of several third servo electric cylinders 17 inside the rotating frame 11 drive the limiting blocks 18 closer to the surface of the construction pipeline until the limiting ball on one side of the limiting block 18 contacts the surface of the construction pipeline. Then, the driving end of the second servo electric cylinder 15 drives the argon arc welding gun 16 closer to the surface of the construction pipeline. The argon arc welding gun 16 is used to perform argon arc welding on the welding position of the construction pipeline. The several limiting blocks 18, in conjunction with the limiting ball, limit the rotation of the rotating frame 11 inside the first driving frame 7, improving the stability of the rotation of the rotating frame 11 inside the first driving frame 7. This ensures the stability of the rotation of the argon arc welding gun 16 on the surface of the construction pipeline, thereby improving the welding accuracy and welding stability of the construction pipeline.

[0046] As a further embodiment of the present invention, a fourth servo electric cylinder 19 is fixedly installed on the inner wall of the rotating frame 11 located inside the lower second drive frame 8, and a cleaning frame 20 is fixedly installed at the drive end of the fourth servo electric cylinder 19. A cleaning roller 21 is rotatably installed inside the cleaning frame 20, and connecting frames 22 are fixedly installed on both sides of the cleaning frame 20. Connecting blocks 23 are slidably installed at the bottom of the two connecting frames 22. An inner tooth groove 24 is provided on one side of the second drive frame 8, and an inner ring groove is provided on the other side of the second drive frame 8. One side of the two connecting blocks 23 is slidably connected to the inner tooth groove 24 and the inner ring groove, respectively.

[0047] The connecting frame 22 on the left side is rotatably equipped with a first transmission column 25, and a second transmission column 26 is movably equipped at the bottom end of the first transmission column 25. The top end of the first transmission column 25 and one end of the cleaning roller 21 are both fixedly equipped with helical gears 27, and the surfaces of the two helical gears 27 mesh with each other. One end of the second transmission column 26 extends into the interior of the connecting block 23, and a driven gear 28 is fixedly equipped at the bottom end of the second transmission column 26. One side of the driven gear 28 passes through the connecting block 23 and extends to the outside of the connecting block 23, and the surface of the driven gear 28 meshes with the interior of the internal tooth groove 24 for transmission.

[0048] It should be noted that when cleaning impurities from the surface of the construction pipeline, the cleaning frame 20 is brought closer to the surface of the construction pipeline by the drive end of the fourth servo electric cylinder 19 until the surface of the cleaning roller 21 contacts the surface of the construction pipeline. When the rotating frame 11 inside the second drive frame 8 is rotated by the drive gear 13, the driven gear 28 at the bottom of the second transmission column 26 on one side of the cleaning frame 20 meshes with the inner wall of the internal tooth groove 24, causing the second transmission column 26 to drive the first transmission column 25 to rotate inside the connecting frame 22. Then, the two meshing helical gears 27 drive the cleaning roller 21 inside the cleaning frame 20 to rotate, allowing the rotating cleaning roller 21 to rotate along the surface of the construction pipeline, thereby achieving comprehensive and automated cleaning of the surface of the construction pipeline and providing a good welding environment for subsequent welding processing.

[0049] A dust-collecting ring is rotatably installed inside the inner ring groove, and one side of the dust-collecting ring is connected to the inside of the connecting block 23 on the right side. The inside of the connecting frame 22 on the right side is connected to the inside of the cleaning frame 20. It should be noted that after the upper and lower second drive frames 8 are connected, the opposite sides of the two dust-collecting rings are engaged, allowing the inside of the two dust-collecting rings to be interconnected. At the same time, the inside of the second drive frame 8 is provided with a dust-collecting cavity, and the inside of the dust-collecting ring is connected to the inside of the dust-collecting cavity. The inside of the dust-collecting cavity is connected to the feed end of the dust-collecting pump through a dust-collecting pipe. The dust-collecting pump is installed on the fixed frame 1, and the discharge end of the dust-collecting pump is provided with a collection box. After the cleaning roller 21 inside the cleaning frame 20 cleans the impurities on the surface of the construction pipe, the cleaned impurities are sent out through the connecting frame 22 on the right side in conjunction with the connecting block 23 and the dust-collecting ring, so as to avoid the cleaned impurities remaining inside the movable frame 6 and affecting the subsequent welding processing effect on the surface of the construction pipe.

[0050] As a further embodiment of the present invention, the positioning component includes a fifth servo electric cylinder 29. Two fifth servo electric cylinders 29 are fixedly installed on both sides inside the upper and lower movable frames 6, and positioning blocks 30 are fixedly installed on the drive ends of the four fifth servo electric cylinders 29. It should be noted that when welding and surface cleaning operations are performed on the construction pipeline, the positioning blocks 30 are driven to contact the surface of the construction pipeline in advance by the drive ends of the fifth servo electric cylinders 29 on both sides of the movable frame 6. The positioning blocks 30 on both sides are used to position the construction pipeline and the welding device to ensure welding accuracy.

[0051] Example 2:

[0052] As a further illustration of the present invention, this embodiment specifically discloses a welding method for an automatic welding device suitable for trenchless pipeline construction in power distribution networks, which specifically includes the following steps:

[0053] Step 1: Place the fixing frame 1 on one side of the construction pipeline and support it with four support blocks 3. Adjust the height of the fixing frame 1 by controlling the extension length of the drive ends of the four adjusting electric cylinders 2. First, control the two movable frames 6 on one side of the mounting frame 4 to separate up and down respectively. Then, push the mounting frame 4 closer to one side of the construction pipeline by the drive ends of the two first servo electric cylinders 5. Finally, control the upper and lower movable frames 6 to move closer to the surface of the construction pipeline until the opposite sides of the upper and lower movable frames 6 contact each other. Then, drive the positioning blocks 30 to contact the surface of the construction pipeline by the drive ends of the fifth servo electric cylinders 29 on both sides of the movable frames 6. Use the positioning blocks 30 on both sides to position the construction pipeline and the welding device.

[0054] Step 2: The second drive frame 8 inside the movable slot 9 is moved by the servo linear slide 10 inside the two movable frames 6 to the welding position of the construction pipe. Then, the cleaning frame 20 is moved closer to the surface of the construction pipe by the drive end of the fourth servo electric cylinder 19 until the surface of the cleaning roller 21 contacts the surface of the construction pipe. When the rotating frame 11 inside the second drive frame 8 is rotated by the drive gear 13, the driven gear 28 at the bottom of the second transmission column 26 on one side of the cleaning frame 20 meshes with the inner wall of the internal tooth groove 24, so that the second transmission column 26 drives the first transmission column 25 to rotate inside the connecting frame 22. Then, the cleaning roller 21 inside the cleaning frame 20 is rotated by the two meshing helical gears 27, so that the rotating cleaning roller 21 rotates along the surface of the construction pipe and the cleaning roller 21 is used to clean the impurities on the surface of the construction pipe.

[0055] Step 3: During the process of cleaning the impurities on the surface of the construction pipeline using the cleaning roller 21, the cleaned impurities are sent out through the connecting frame 22 on the right side in conjunction with the connecting block 23 and the dust suction ring.

[0056] Step 4: The first drive frame 7 inside the movable slot 9 is moved by the servo linear slide 10 inside the two movable frames 6 to the welding position of the construction pipeline. Then, the limit block 18 is driven by the drive end of several third servo electric cylinders 17 inside the rotating frame 11 to approach the surface of the construction pipeline until the limit ball on one side of the limit block 18 contacts the surface of the construction pipeline. Then, the argon arc welding gun 16 is driven by the drive end of the second servo electric cylinder 15 to approach the surface of the construction pipeline. The argon arc welding gun 16 is used to perform argon arc welding on the welding position of the construction pipeline. The meshing transmission between the drive gear 13 and the external gear ring 14 is used to make the two rotating frames 11 rotate inside the upper and lower first drive frames 7 until the fully automated welding process of the construction pipeline surface is completed.

[0057] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0058] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. An automatic welding device suitable for trenchless pipeline construction in power distribution networks, characterized in that, include: A fixed frame (1) is provided with adjusting electric cylinders (2) fixedly arranged around the top of the fixed frame (1), and the driving ends of the four adjusting electric cylinders (2) all penetrate the fixed frame (1) and extend to the bottom of the fixed frame (1). Support blocks (3) are fixedly arranged at the bottom of the driving ends of the four adjusting electric cylinders (2). Mounting bracket (4), two first servo electric cylinders (5) are symmetrically fixed inside the fixed bracket (1), and the mounting bracket (4) is also movably installed on one side inside the fixed bracket (1). The driving ends of the two first servo electric cylinders (5) are respectively fixedly connected to the front and rear sides of the mounting bracket (4). The movable frame (6) is provided with two movable frames (6) on one side of the mounting frame (4) via electric sliding tables, and the two movable frames (6) are provided with welding components and cleaning components inside. Positioning components are provided on the front and back sides of the interior of the two movable frames (6); The welding assembly includes a first drive frame (7), and the cleaning assembly includes a second drive frame (8). Each of the two movable frames (6) has an internal movable groove (9), and the first drive frame (7) and the second drive frame (8) are slidably disposed within each of the two movable grooves (9). A servo linear slide (10) is fixedly disposed on one side of the inner wall of each of the two movable grooves (9), and one side of each servo linear slide (10) is slidably connected to one side of each of the first drive frame (7) and the second drive frame (8). The interiors of the first drive frame (7) and the second drive frame (8) are rotatably disposed. There is a rotating frame (11), and the two rotating frames (11) are movably connected to each other on opposite sides through a socket; a driving block (12) is fixedly installed on the top of the upper movable frame (6), and a driving motor is fixedly installed on one side of the driving block (12). A driving gear (13) is rotatably installed inside the driving block (12), and the inside of the driving gear (13) is fixedly connected to the output shaft of the driving motor; an external gear ring (14) that cooperates with the driving gear (13) is provided on one side of the rotating frame (11), and the surface of the external gear ring (14) meshes with the surface of the driving gear (13) for transmission; A second servo electric cylinder (15) is fixedly installed inside the rotating frame (11) located inside the first drive frame (7) below, and an argon arc welding gun (16) is fixedly installed at the drive end of the second servo electric cylinder (15). Several third servo electric cylinders (17) are fixedly installed on the inner wall of the rotating frame (11) located inside the two first drive frames (7), and a limit block (18) is fixedly installed at the drive end of the several third servo electric cylinders (17). Several limit balls are rotatably installed on one side of the limit block (18). A fourth servo cylinder (19) is fixedly installed on the inner wall of the rotating frame (11) located inside the lower second drive frame (8), and a cleaning frame (20) is fixedly installed at the drive end of the fourth servo cylinder (19). A cleaning roller (21) is rotatably installed inside the cleaning frame (20). A connecting frame (22) is fixedly installed on both sides of the cleaning frame (20), and a connecting block (23) is slidably installed at the bottom of the two connecting frames (22). An internal tooth groove (24) is provided on one side of the second drive frame (8), and an inner ring groove is provided on the other side of the second drive frame (8). One side of the two connecting blocks (23) is slidably connected to the inside of the internal tooth groove (24) and the inner ring groove, respectively. The connecting frame (22) on the side is rotatably provided with a first transmission column (25), and a second transmission column (26) is movably provided at the bottom end of the first transmission column (25). The top end of the first transmission column (25) and one end of the cleaning roller (21) are both fixedly provided with helical gears (27), and the surfaces of the two helical gears (27) mesh with each other. One end of the second transmission column (26) extends into the interior of the connecting block (23), and a driven gear (28) is fixedly provided at the bottom end of the second transmission column (26). One side of the driven gear (28) passes through the connecting block (23) and extends to the outside of the connecting block (23), and the surface of the driven gear (28) meshes with the interior of the internal tooth groove (24) for transmission.

2. The automatic welding device for trenchless pipeline construction in power distribution networks according to claim 1, characterized in that: The positioning component includes a fifth servo electric cylinder (29). Two fifth servo electric cylinders (29) are fixedly installed on both sides inside the upper and lower movable frames (6), and positioning blocks (30) are fixedly installed on the drive ends of the four fifth servo electric cylinders (29).

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