Intelligent welding device capable of adapting to pipelines with different pipe diameters

Abstract

The invention discloses an intelligent pipeline welding device capable of adapting to different pipe diameters, and relates to the technical field of welding devices, the intelligent pipeline welding device comprises a mounting frame, an outer fixing assembly, an inner fixing assembly and a welding gun, the outer fixing assembly and the inner fixing assembly are both mounted on the mounting frame, and the welding gun is arranged on the outer fixing assembly. During working, a to-be-welded pipeline is arranged between the two assemblies, the outer part of the outer fixing assembly is clamped, the inner part of the inner fixing assembly is supported, collaborative wrapping type fixing is formed, stress is balanced, and welding deviation and shaking are avoided. The device can adapt to different pipe diameters through self-adjustment of the assembly, a clamp or a whole set of equipment does not need to be replaced, and operation is simplified; the welding gun and the outer fixing assembly are integrated, welding and fixing synchronization is guaranteed, positioning errors are reduced, the welding quality stability is improved, and the device is suitable for construction of pipelines of various specifications, high in universality and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an intelligent pipe welding device that can adapt to different pipe diameters. Background Technology

[0002] Pipeline welding is a core process in pipeline construction and fluid transport system installation, and its quality directly affects the system's sealing, safety, and service life. Existing pipeline welding equipment suffers from the following technical shortcomings: First, poor adaptability; most devices can only weld pipes of fixed diameters. For pipes of different specifications, specialized clamps or entire sets of equipment must be replaced, resulting in cumbersome operation and high equipment investment costs. Second, insufficient fixing stability; traditional fixing methods often use a single external clamp or internal support structure, which is prone to displacement and shaking during welding due to uneven pipe stress, leading to uneven welds and insufficient weld strength. Third, low welding precision; the position adjustment of the welding gun relies heavily on manual operation, making it difficult to ensure precise contact between the welding gun and the pipe weld, and it cannot adaptively adjust the welding angle and distance according to changes in pipe diameter, affecting the consistency of weld quality. To address these shortcomings of existing technologies, this invention proposes an intelligent pipeline welding device adaptable to different pipe diameters to solve the aforementioned technical problems. Summary of the Invention

[0003] The present invention provides an intelligent pipe welding device that can adapt to different pipe diameters, in order to solve at least one of the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A smart pipe welding device adaptable to different pipe diameters includes a mounting frame, an external fixing component mounted on the mounting frame, an internal fixing component disposed inside the external fixing component, the internal fixing component being mounted on the mounting frame, and a welding gun mounted on the external fixing component.

[0005] Preferably, a first connecting rod is fixedly connected to the external fixing assembly, a telescopic rod is provided on the first connecting rod, a sliding shaft is provided at the end of the telescopic rod, and the sliding shaft is slidably connected to the adjusting ring; The adjusting ring is semi-circular; A back pressure chamber is fixedly connected to the inner side of the adjusting ring. A balance plate is slidably connected inside the back pressure chamber. A first spring is provided between the balance plate and the inner cavity of the back pressure chamber. The two ends of the first spring are fixedly connected to the balance plate and the back pressure chamber, respectively. A welding gun is fixedly connected to the balance plate; A third link is fixedly connected to the balance plate. The third link is located outside the welding gun and is fixedly connected to a limit ring.

[0006] Preferably, the mounting bracket is equipped with a drive motor, which is used to drive the inner fixing component and the outer fixing component to fix the pipe to be welded.

[0007] Preferably, the external fixing component includes a slide rail, which is fixedly connected to a fixing plane, and the fixing plane is fixedly connected to a mounting bracket; A slider is slidably connected to the slide rail, a support block is fixedly connected to the slider, a fixing plate is fixedly connected to the support block, and a clamping plate for fixing the pipe to be welded is provided on the fixing plate.

[0008] Preferably, a second rotating shaft is provided on the slide rail, and a linkage rod is rotatably connected to the second rotating shaft. The linkage rod is formed by two sets of straight rods that are perpendicular to each other and fixedly connected. A first sliding groove and a second sliding groove are respectively provided on the two sections of the linkage rod. A first rotating shaft is slidably connected in the first sliding groove. The first rotating shaft is fixedly connected to a sliding plate. The sliding plate is threadedly connected to a drive shaft. The drive shaft is fixedly connected to the output end of a drive motor. A fixed shaft is slidably connected within the second groove, and the fixed shaft is fixedly connected to the slider.

[0009] Preferably, a limiting slide plate is fixedly connected to the mounting bracket, and the limiting slide plate is slidably inserted into the sliding plate.

[0010] Preferably, the internal fixing component includes a fixing plate, which is fixedly connected to the end of the drive shaft. The fixing plate is provided with a plurality of helical grooves, and a third rotating shaft is slidably connected in the helical grooves. The third rotating shaft is fixedly connected to the follower block, and a balance bar is fixedly connected to the follower block. A fixing head is provided on the balance bar.

[0011] Preferably, the fixing head is fixedly connected to the retraction slide rod, the retraction slide rod is slidably connected to the balance rod, and a second spring is provided between the balance rod and the fixing head, the second spring being sleeved on the retraction slide rod.

[0012] Preferably, the mounting bracket is provided with an abutment plate, the abutment plate is provided with an inner support ring, the inner support ring is provided with a limiting sliding hole, and the balance bar is slidably connected to the limiting sliding hole.

[0013] Preferably, the fixing plate is disposed inside the inner support ring; The drive shaft passes through the abutment plate.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: During operation, the pipe to be welded is first placed between the inner and outer fixing components. The inner and outer components work together to apply fixing forces simultaneously from both the inside and outside of the pipe, creating a wrap-around fixing effect. The outer fixing component clamps and limits the pipe from the outside, while the inner fixing component provides support from the inside. The two components work in tandem, balancing the forces, completely changing the traditional single-clamp or single-support fixing method. This dual-fixing design not only effectively avoids displacement and shaking caused by uneven force during welding, but also adapts to pipes of different diameters through the adjustment potential of the components themselves. Unlike traditional devices, it eliminates the need to replace special clamps or entire sets of equipment, significantly simplifying the operation process. Simultaneously, the integrated design of the welding gun and the outer fixing component ensures the synchronization of welding and fixing actions, reducing positioning errors caused by component separation and guaranteeing the stability of welding quality from an overall structural perspective. This solution fundamentally solves the shortcomings of existing devices, such as poor adaptability and high equipment investment costs. Furthermore, the dual-fixing improves the stability of the welding process, laying the foundation for subsequent precise welding. It is suitable for construction scenarios with various pipe specifications, offering strong versatility and convenient operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the adjusting ring structure of the present invention; Figure 3 This is a front view schematic diagram of the welding gun mounting structure of the present invention; Figure 4 This is a top view of the welding gun mounting structure of the present invention; Figure 5 This is a schematic diagram of the fixed component structure of the present invention; Figure 6 This is a schematic diagram of the external fixation component structure of the present invention; Figure 7 This is a schematic diagram of the internal fixation component structure of the present invention.

[0016] In the diagram: 1. Mounting bracket; 2. Internal fixing assembly; 3. External fixing assembly; 4. Slide rail; 5. First connecting rod; 6. Telescopic rod; 7. Adjusting ring; 8. Drive shaft; 9. Drive motor; 10. Sliding shaft; 11. Welding gun; 12. Limiting ring; 13. Third connecting rod; 14. Balance plate; 15. Back pressure chamber; 16. First spring; 17. Sliding plate; 18. Linkage rod; 19. First slide groove; 20. Second slide groove; 21. 21. Slider; 22. Support block; 23. Fixing plate; 24. Clamping plate; 25. Inner support ring; 26. Pipe to be welded; 27. First rotating shaft; 28. Limiting slide plate; 29. ​​Fixing plane; 30. Second rotating shaft; 31. Fixing plate; 32. Helical groove; 33. Follower block; 34. Third rotating shaft; 35. Balance bar; 36. Fixing head; 37. Retracting slide bar; 38. Second spring; 39. Limiting slide hole; 40. Abutment plate. Detailed Implementation

[0017] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish protective components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions and features 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, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0018] Example 1: Please refer to Figure 1 A smart pipe welding device adaptable to different pipe diameters includes a mounting frame 1, an external fixing component 3 is mounted on the mounting frame 1, an internal fixing component 2 is disposed inside the external fixing component 3, the internal fixing component 2 is mounted on the mounting frame 1, and a welding gun 11 is mounted on the external fixing component 3.

[0019] The working principle and beneficial effects of the above scheme are as follows: During operation, the pipe 26 to be welded is first placed between the inner fixing component 2 and the outer fixing component 3. The inner and outer components work together to apply fixing forces simultaneously from both the inside and outside of the pipe, creating a wrap-around fixing effect. The outer fixing component 3 clamps and limits the pipe from the outside, while the inner fixing component 2 provides support from the inside. The two components work in tandem, balancing the forces, completely changing the traditional single-clamp or single-support fixing method. This dual-fixing design not only effectively avoids displacement and shaking caused by uneven force during welding of the pipe 26, but also adapts to pipes of different diameters through the adjustment potential of the components themselves. Unlike traditional devices, it eliminates the need to replace special clamps or the entire equipment, significantly simplifying the operation process. Simultaneously, the integrated design of the welding gun 11 and the outer fixing component 3 ensures the synchronization of welding operations and fixing actions, reducing positioning errors caused by component separation and guaranteeing the stability of welding quality from an overall structural perspective. This solution fundamentally solves the shortcomings of existing devices, such as poor adaptability and high equipment investment costs. At the same time, it improves the stability of the welding process through double fixing, laying the foundation for subsequent precise welding. It is applicable to construction scenarios of various pipe specifications, with strong versatility and convenient operation.

[0020] Example 2: Please refer to Figures 1-4 Based on embodiment 1, a first connecting rod 5 is fixedly connected to the external fixing component 3, a telescopic rod 6 is provided on the first connecting rod 5, a sliding shaft 10 is provided at the end of the telescopic rod 6, and the sliding shaft 10 is slidably connected to the adjusting ring 7. The adjusting ring 7 is semi-circular; The inner side of the adjusting ring 7 is fixedly connected to the back pressure chamber 15, and the back pressure chamber 15 is slidably connected to the balance plate 14. A first spring 16 is provided between the balance plate 14 and the inner cavity of the back pressure chamber 15, and the two ends of the first spring 16 are fixedly connected to the balance plate 14 and the back pressure chamber 15 respectively. A welding gun 11 is fixedly connected to the balance plate 14; A third connecting rod 13 is fixedly connected to the balance plate 14. The third connecting rod 13 is located outside the welding gun 11, and a limit ring 12 is fixedly connected to the third connecting rod 13.

[0021] The working principle and beneficial effects of the above scheme are as follows: During operation, after the external fixing component 3 fixes the pipe 26 to be welded, the telescopic rod 6 on the first connecting rod 5 can flexibly extend and retract according to the pipe diameter to adjust the axial distance. The sliding shaft 10 at the end of the telescopic rod 6 can slide freely within the semi-annular adjusting ring 7, driving the welding gun 11 to make multi-angle adjustments around the weld seam, ensuring that the welding gun 11 can adapt to the weld seam curvature of pipes with different diameters. The back pressure chamber 15 on the inner side of the adjusting ring 7 and the balance plate 14 form an elastic buffer structure. The two ends of the first spring 16 are fixed to the balance plate 14 and the back pressure chamber 15 respectively. The elastic force of the spring continuously pushes the balance plate 14, keeping the welding gun 11 at a suitable welding distance. Even if the pipe has a slight ellipticity or the pipe diameter changes slightly, the welding distance can be adaptively adjusted by the extension and retraction of the first spring 16 to avoid incomplete welding or over-fusion welding. Even when the curvature of the pipe surface is different from that of the adjusting ring 7, the welding gun 11 can still be kept at a suitable welding distance. The third connecting rod 13 on the balance plate 14 and the limiting ring 12 form an auxiliary positioning structure. The limiting ring 12 surrounds the outside of the welding gun 11, effectively limiting the lateral displacement of the welding gun 11 and ensuring the straightness and consistency of the welding trajectory. Through the adaptive design of the mechanical structure, the traditional method of manually adjusting the position of the welding gun 11 is replaced, which not only reduces the intensity of manual operation but also significantly improves the welding accuracy. It ensures that the weld flatness and welding strength of pipes of different diameters are consistent, solving the technical problems of low welding accuracy and poor quality stability of existing devices. At the same time, the structure is compact and the adjustment is flexible, further expanding the applicable scenarios of the device.

[0022] Example 3: Please refer to Figure 1 , Figure 5 , Figure 6 Based on Embodiment 1, the mounting frame 1 is provided with a drive motor 9, which is used to drive the external fixing component 3 to fix the pipe 26 to be welded.

[0023] The external fixing component 3 includes a slide rail 4, which is fixedly connected to the fixing plane 29, and the fixing plane 29 is fixedly connected to the mounting bracket 1; A slider 21 is slidably connected to the slide rail 4. A support block 22 is fixedly connected to the slider 21. A fixing plate 23 is fixedly connected to the support block 22. A clamping plate 24 for fixing the pipe 26 to be welded is provided on the fixing plate 23.

[0024] The slide rail 4 is provided with a second rotating shaft 30, and a linkage rod 18 is rotatably connected to the second rotating shaft 30. The linkage rod 18 is formed by two sets of straight rods that are perpendicular to each other and fixedly connected. The two sections of the linkage rod 18 are respectively provided with a first sliding groove 19 and a second sliding groove 20. A first rotating shaft 27 is slidably connected in the first sliding groove 19. The first rotating shaft 27 is fixedly connected to the sliding plate 17. The sliding plate 17 is threadedly connected to the drive shaft 8. The drive shaft 8 is fixedly connected to the output end of the drive motor 9. A fixed shaft is slidably connected within the second groove 20, and the fixed shaft is fixedly connected to the slider 21.

[0025] The mounting bracket 1 is fixedly connected to a limiting slide plate 28, which is slidably inserted into the sliding plate 17.

[0026] The working principle and beneficial effects of the above scheme are as follows: During operation, after the drive motor 9 starts as the power source, the drive shaft 8 at its output end drives the threaded sliding plate 17 to move. The limiting slide plate 28 on the mounting bracket 1 is slidably inserted into the sliding plate 17, providing guidance and limiting for the sliding plate 17, ensuring that the sliding plate 17 moves smoothly along a straight line and avoiding deflection. The first rotating shaft 27 on the sliding plate 17 is embedded in the first sliding groove 19 of the linkage rod 18. As the sliding plate 17 moves, the first rotating shaft 27 slides in the first sliding groove 19 and pushes the linkage rod 18 to rotate around the second rotating shaft 30. The linkage rod 18 is formed by two sets of mutually perpendicular straight rods fixedly connected. The second sliding groove 20 at its other end is connected to the slider 21 through a fixed shaft. When the linkage rod 18 rotates, the second sliding groove 20 drives the fixed shaft and the slider 21 to slide synchronously along the slide rail 4. The slider 21 is fixedly connected to the fixing plate 23 via the support block 22. The clamping plates 24 on the fixing plate 23 move with the slider 21 towards the pipe 26 to be welded. Multiple clamping plates 24 are symmetrically distributed and apply clamping force to the center of the pipe simultaneously, ensuring uniform force on the outer surface of the pipe 26 to be welded, effectively preventing pipe deformation or loosening caused by excessive local pressure. This linkage drive structure achieves synchronous action of multiple clamping plates 24 through a single drive motor 9, ensuring the balance and stability of the fixing force. The sliding cooperation between the slide rail 4 and the slider 21 allows for flexible adjustment of the clamping range of the clamping plates 24, adapting to various pipe specifications from small to large diameters. There is no need to replace the clamping plates 24 or adjust the clamping structure, making operation simple and efficient. Compared with traditional external fixing components, this solution significantly improves the fixing stability, avoiding uneven welds caused by the displacement and shaking of the pipe 26 to be welded during welding, while reducing equipment replacement costs and operational complexity, and improving the construction efficiency of pipe welding.

[0027] Example 4: Please refer to Figure 1 , Figure 5 , Figure 7Based on Embodiment 1, the mounting frame 1 is provided with a drive motor 9, which is used to drive the inner fixing component 2 to fix the pipe 26 to be welded.

[0028] The internal fixing component 2 includes a fixing plate 31, which is fixedly connected to the end of the drive shaft 8. The drive shaft 8 is fixedly connected to the output end of the drive motor 9. The fixing plate 31 is provided with a plurality of helical grooves 32. A third rotating shaft 34 is slidably connected in the helical grooves 32. The third rotating shaft 34 is fixedly connected to the follower block 33. A balance bar 35 is fixedly connected to the follower block 33. A fixing head 36 is provided on the balance bar 35.

[0029] The fixed head 36 is fixedly connected to the retraction slide bar 37, the retraction slide bar 37 is slidably connected to the balance bar 35, and a second spring 38 is provided between the balance bar 35 and the fixed head 36, the second spring 38 being sleeved on the retraction slide bar 37.

[0030] The mounting bracket 1 is provided with an abutment plate 40, the abutment plate 40 is provided with an inner support ring 25, the inner support ring 25 is provided with a limiting sliding hole 39, and the balance bar 35 is slidably connected to the limiting sliding hole 39.

[0031] The fixed plate 31 is disposed inside the inner support ring 25; The drive shaft 8 passes through the abutment plate 40.

[0032] The working principle and beneficial effects of the above scheme are as follows: During operation, the drive motor 9 drives the drive shaft 8 to rotate. After passing through the abutment plate 40, the drive shaft 8 drives the fixed plate 31 at its end to rotate inside the inner support ring 25. Several helical grooves 32 on the fixed plate 31 are radially distributed. The follower block 33 is slidably connected to the helical grooves 32 through the third rotating shaft 34. When the fixed plate 31 rotates, the helical grooves 32 generate radial thrust on the follower block 33 through the third rotating shaft 34, causing the follower block 33 to move along the radius of the fixed plate 31. The balance rod 35 on the follower block 33 is embedded in the limiting sliding hole 39 of the inner support ring 25. The limiting sliding hole 39 provides guidance for the balance rod 35, ensuring that the balance rod 35 extends and retracts smoothly along a straight line. The fixed head 36 at the end of the balance rod 35 moves with the balance rod 35 and abuts against the inner wall of the pipe 26 to be welded. Multiple balance rods 35 are evenly distributed in a ring, synchronously applying support force to the inner wall of the pipe 26 to be welded, achieving uniform support inside the pipe. The fixed head 36 and the balance bar 35 are connected to the second spring 38 via a retraction slide bar 37. The second spring 38 is sleeved on the retraction slide bar 37. When the fixed head 36 abuts against the inner wall of the pipe to be welded 26, the second spring 38 is in a compressed state, buffering the supporting force of the fixed head 36 through elastic reaction force, avoiding excessive clamping that could damage the inner wall of the pipe. It also adapts to slight unevenness of the inner wall of the pipe, ensuring tight support. This internal fixing component 2 and the external fixing component 3 form a double-fixing system, further improving the stability of the pipe 26 during welding and preventing axial or radial displacement of the pipe during welding. The guiding design of the helical groove 32 allows for flexible adjustment of the extension distance of the fixed head 36, adapting to pipes of different inner diameters without requiring replacement of the fixed head 36 component, thus expanding the applicability of the device. Compared with traditional internal support structures, this solution not only solves the problem of limited adaptability but also protects the inner wall of the pipe through elastic buffering design. Simultaneously, it provides uniform support force and reliable fixation, offering a solid guarantee for high-quality welding.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A smart pipe welding device adaptable to different pipe diameters, characterized in that, The device includes a mounting frame (1), on which an external fixing component (3) is mounted, and an internal fixing component (2) is provided inside the external fixing component (3). The internal fixing component (2) is mounted on the mounting frame (1), and a welding gun (11) is mounted on the external fixing component (3).

2. The intelligent pipe welding device adaptable to different pipe diameters according to claim 1, characterized in that, The external fixing component (3) is fixedly connected to a first connecting rod (5), and a telescopic rod (6) is provided on the first connecting rod (5). A sliding shaft (10) is provided at the end of the telescopic rod (6), and the sliding shaft (10) is slidably connected to the adjusting ring (7). The adjusting ring (7) is semi-circular; The inner side of the adjusting ring (7) is fixedly connected to the back pressure chamber (15), and the back pressure chamber (15) is slidably connected to the balance plate (14). A first spring (16) is provided between the balance plate (14) and the inner cavity of the back pressure chamber (15). The two ends of the first spring (16) are fixedly connected to the balance plate (14) and the back pressure chamber (15) respectively. A welding gun (11) is fixedly connected to the balance plate (14). A third link (13) is fixedly connected to the balance plate (14). The third link (13) is located outside the welding gun (11). A limit ring (12) is fixedly connected to the third link (13).

3. The intelligent pipe welding device adaptable to different pipe diameters according to claim 1, characterized in that, The mounting bracket (1) is equipped with a drive motor (9), which is used to drive the inner fixing component (2) and the outer fixing component (3) to fix the pipe (26) to be welded.

4. The intelligent pipe welding device adaptable to different pipe diameters according to claim 3, characterized in that, The external fixing component (3) includes a slide rail (4), which is fixedly connected to a fixing plane (29), and the fixing plane (29) is fixedly connected to the mounting bracket (1); A slider (21) is slidably connected to the slide rail (4), a support block (22) is fixedly connected to the slider (21), a fixing plate (23) is fixedly connected to the support block (22), and a clamping plate (24) for fixing the pipe (26) to be welded is provided on the fixing plate (23).

5. The intelligent pipe welding device adaptable to different pipe diameters according to claim 4, characterized in that, The slide rail (4) is provided with a second rotating shaft (30), and a linkage rod (18) is rotatably connected to the second rotating shaft (30). The linkage rod (18) is formed by two sets of straight rods that are perpendicular to each other and are fixedly connected. The two sections of the linkage rod (18) are respectively provided with a first sliding groove (19) and a second sliding groove (20). A first rotating shaft (27) is slidably connected in the first sliding groove (19). The first rotating shaft (27) is fixedly connected to the sliding plate (17). The sliding plate (17) is threadedly connected to the drive shaft (8). The drive shaft (8) is fixedly connected to the output end of the drive motor (9). A fixed shaft is slidably connected inside the second groove (20), and the fixed shaft is fixedly connected to the slider (21).

6. The intelligent pipe welding device adaptable to different pipe diameters according to claim 5, characterized in that, The mounting bracket (1) is fixedly connected to a limiting slide plate (28), which is slidably inserted into the sliding plate (17).

7. The intelligent pipe welding device adaptable to different pipe diameters according to claim 3, characterized in that, The internal fixing component (2) includes a fixing plate (31), which is fixedly connected to the end of the drive shaft (8). The fixing plate (31) is provided with a plurality of helical grooves (32). A third rotating shaft (34) is slidably connected in the helical grooves (32). The third rotating shaft (34) is fixedly connected to the follower block (33). A balance bar (35) is fixedly connected to the follower block (33). A fixing head (36) is provided on the balance bar (35).

8. The intelligent pipe welding device adaptable to different pipe diameters according to claim 7, characterized in that, The fixed head (36) is fixedly connected to the retraction slide (37), the retraction slide (37) is slidably connected to the balance bar (35), and a second spring (38) is provided between the balance bar (35) and the fixed head (36), the second spring (38) being sleeved on the retraction slide (37).

9. The intelligent pipe welding device adaptable to different pipe diameters according to claim 7, characterized in that, The mounting bracket (1) is provided with an abutment plate (40), the abutment plate (40) is provided with an inner support ring (25), the inner support ring (25) is provided with a limit sliding hole (39), and the balance bar (35) is slidably connected to the limit sliding hole (39).

10. The intelligent pipe welding device adaptable to different pipe diameters according to claim 7, characterized in that, The fixed plate (31) is located inside the inner support ring (25); The drive shaft (8) passes through the abutment plate (40).

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