Self-adaptive multi-section hinged type large-diameter pipeline automatic welding machine crawling track

Abstract

The invention relates to a crawling track, in particular to a self-adaptive multi-section hinged type crawling track of an automatic welding machine for large-diameter pipelines. The device comprises a connecting assembly, the connecting assembly comprises a first fixing plate, a plurality of angle adjusting assemblies are evenly distributed on the side, away from the track modules, of the first fixing plate, and a fixing assembly is arranged on the arc-shaped side wall, close to one end of the first fixing plate, of the other track module. A connecting block penetrates into a notch in one side of a second fixing plate, then a user inserts a second sliding block into the second fixing plate, and two corresponding clamping blocks clamp one end of a first sliding block and fix the connecting block into the second fixing plate under the pressing of a plurality of second compression springs; and the operation is simple and rapid, the size of the device can be adjusted by adjusting the number of the track modules according to the size of the pipeline, and the universality of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a crawling track, in particular to a self-adaptive multi-section articulated large-diameter pipeline automatic welding machine crawling track. BACKGROUND

[0002] With the increasing requirements of construction quality, efficiency and safety in engineering sites, automatic welding technology has become the mainstream choice in large-diameter pipeline engineering. Its characteristics of high efficiency, high quality and high safety make it widely used in long-distance pipeline and urban pipeline network. The magnetic type full-position automatic welding machine is usually used in construction sites. After welding power is turned on, it is automatically adsorbed on the surface of the pipeline and walks. When the walking roller of the automatic welding machine passes through the position of the weld reinforcement (the large-diameter pipeline is usually made of steel plate, and the surface is raised by 1-2mm after welding), it often causes bumping or deviation, which leads to the deviation of the welding gun from the predetermined welding path, and also easily causes the instability of the welding machine speed or the wire feeding amount, which affects the welding parameters, and finally causes the uneven weld formation at the pipe joint, which may cause undercut, incomplete fusion and other defects, and reduces the mechanical properties. Especially for the transportation of high-pressure and high-risk liquids, small defects in the weld can cause leakage, explosion or environmental pollution, and other disastrous consequences. Therefore, when large-diameter pipelines (usually DN500 or above) are connected, a special walking track for the automatic welding machine needs to be set to ensure the quality of the weld.

[0003] The common pipeline automatic welding machine crawling track is generally fixed in size. Usually, one size of pipeline needs to be customized with one specification and model of track. In the process of pipeline automatic welding in large machine rooms, there are many types and sizes of pipelines. The existing pipeline crawling mechanism cannot be adjusted, so it is necessary to customize multiple types and sizes of track mechanisms, which is time-consuming and laborious and not economical. In addition, for different weld positions on the pipeline, the crawling track needs to be disassembled and reinstalled each time, which is low in efficiency. In view of this, a self-adaptive multi-section articulated large-diameter pipeline automatic welding machine crawling track is proposed. SUMMARY

[0004] The purpose of the present application is to provide a self-adaptive multi-section articulated large-diameter pipeline automatic welding machine crawling track to solve the problems raised in the background art: 1. The size of the existing pipeline automatic welding machine crawling track cannot be adjusted according to the size of the pipeline, and the same size track needs to be customized for each size of the pipeline. 2. The existing track needs to be disassembled and reassembled multiple times when changing positions on the same pipeline.

[0005] In order to achieve the above object, an adaptive multi-section articulated large-diameter pipeline automatic welding machine crawling track is provided, comprising a plurality of track modules, the track modules are arc-shaped, a plurality of the track modules are spliced together to form a ring shape, a connecting assembly is arranged between two adjacent track modules, the connecting assembly is used for connecting two track modules, a size adjusting assembly is arranged between two track modules at both ends, the connecting assembly comprises a first fixed plate, the first fixed plate is fixedly arranged on the arc-shaped side wall at one end of one track module, a plurality of angle adjusting assemblies are uniformly arranged on the side of the first fixed plate away from the track module, a fixing assembly is arranged on the arc-shaped side wall at one end of the first fixed plate of another track module, the angle adjusting assemblies are used for connecting the first fixed plate and the fixing assembly, and the first fixed plate and the fixing assembly are arranged on the inner side of the track module.

[0006] After the positioning of the two track modules is completed, the user fixes the angle adjusting assemblies by operating the fixing assembly to connect the two track modules, and after the plurality of track modules are connected, the user adjusts the size of the device by operating the size adjusting assembly.

[0007] As a further improvement of the technical solution, the angle adjusting assembly comprises a fixed block, the fixed block is fixedly arranged on the side of the first fixed plate away from the track module, one end of the fixed block is provided with a first sliding block, one end of the first sliding block is slidingly arranged in the interior of the fixed block, and the fixed block and the first sliding block are arc-shaped.

[0008] When the track module rotates, the fixed block and the first sliding block are pressed, and the first sliding block rotates with the rotation of the track module.

[0009] As a further improvement of the technical solution, one end of the first sliding block in the interior of the fixed block is fixedly provided with a first compression spring in a left-right symmetrical manner, one end of the first compression spring away from the first sliding block is fixedly connected with the inner wall of the fixed block, the first compression spring is used for pressing one end of the first sliding block to the outside of the fixed block, and one end of the first sliding block away from the fixed block is fixedly provided with a connecting block.

[0010] Under the pressing of the two first compression springs, the first sliding block slides to the outside of the fixed block and drives the connecting block to move.

[0011] As a further improvement of the technical solution, the fixing assembly comprises a second fixed plate, the second fixed plate is fixedly arranged on one side of the track module, a second sliding block is slidingly arranged in the interior of the second fixed plate, a slot matching the plurality of connecting blocks is formed in the side of the second fixed plate away from the track module and the middle of the second sliding block, a handle is fixedly arranged at one end of the second sliding block, and the handle is arranged on the outer side of the second fixed plate.

[0012] After positioning the two track modules, the user holds the handle at one end of the second slider to pull the second slider out of the interior of the second fixed plate, causing the connecting block to move into the notch on the side of the second fixed plate.

[0013] As a further improvement of the technical solution, the notches in the second slider are symmetrically provided with clamping blocks that slide left and right, and two clamping blocks are used to fix the connecting block inside the second fixed plate. The side of each clamping block away from the other is symmetrically fixed with a second compression spring for pressing the clamping block. The end of the second compression spring away from the clamping block is fixedly connected to the second slider.

[0014] When the second slider is inserted into the interior of the second fixed plate, the clamping blocks gradually come into contact with the end of the first slider near the connecting block. The surface of the clamping block in contact with the first slider is a bevel. When the clamping blocks come into contact with the first slider, the first slider pushes the two clamping blocks apart. Then the first slider enters the notch of the second slider and is located between the two clamping blocks. Under the extrusion of the two second compression springs, the two clamping blocks are in close contact with the first slider, and the connecting block is clamped and fixed inside the second fixed plate, allowing the first fixed plate and the second fixed plate to be connected.

[0015] As a further improvement of the technical solution, the size adjustment assembly includes a first connecting plate that is rotationally connected to a track module. The side of the first connecting plate away from the track module is provided with a second connecting plate. The side of the second connecting plate near the first connecting plate is fixedly provided with a first protrusion that slides inside the first connecting plate. The side of the second connecting plate away from the first connecting plate is fixedly provided with a second protrusion. The side of the second protrusion away from the second connecting plate is provided with a third connecting plate that is rotationally connected to a track module. The side of the third connecting plate near the second protrusion is provided with a notch that matches the second protrusion. The third connecting plate is used to fix the second protrusion. The first connecting plate and the third connecting plate are both arc-shaped.

[0016] After the multiple track modules are connected, the user adjusts the length of the part of the first protrusion inside the first connecting plate to fine-tune the size of the device to match the size of the pipeline. After the device is adsorbed on the pipeline, the user inserts the second protrusion into the end of the third connecting plate.

[0017] As a further improvement of the technical solution, the arc-shaped side walls of the first connecting plate and the third connecting plate are respectively threadedly connected with a first screw and a second screw. The end of the first screw and the second screw inside the first connecting plate and the third connecting plate is respectively embedded with rubber. The first screw and the second screw are respectively used to fix the first protrusion and the second protrusion.

[0018] After the second protruding block is inserted into one end of the third connecting plate, the user tightens the second screw to extrude and fix the second protruding block, and after the position of the first protruding block is adjusted, the user tightens the first screw to extrude and fix the first protruding block.

[0019] As a further improvement of the present technical solution, at least one ridge is arranged on the surface of the track module in the radial direction, which is used as a guide rail for the automatic welding equipment, so that the automatic welding equipment walks along the center line of the track module through the ridge.

[0020] Furthermore, the ridge has two ridges arranged along the two side edges in the arc direction of the track module.

[0021] Compared with the prior art, the present application has the following advantages: 1. In the self-adapting multi-section hinged large-diameter pipeline automatic welding machine crawling track, the user pulls out the second sliding block from the inside of the second fixed plate, then inserts the corresponding connecting block into the slot on one side of the second fixed plate, and then inserts the second sliding block into the inside of the second fixed plate under the pressing of the plurality of second compression springs, so that the two clamping blocks clamp one end of the first sliding block and fix the connecting block in the inside of the second fixed plate, thereby completing the butt joint of the two track modules. The operation is simple and fast, and the size of the device can be adjusted by adjusting the number of track modules according to the size of the pipeline, thereby improving the versatility of the device.

[0022] 2. In the self-adapting multi-section hinged large-diameter pipeline automatic welding machine crawling track, when moving the device, the user loosens the second screw and pulls out the second protruding block from the inside of the third connecting plate, then inserts the plurality of track modules into the inside of the third connecting plate and moves them to the designated position, and then tightens the second screw to fix the second protruding block. Without the need to repeatedly disassemble and assemble the device, the installation efficiency of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a bottom view of the structure of the adjacent two track modules of the present application; Figure 3 It is a bottom view of the structure of the connecting assembly of the present application; Figure 4 It is a schematic diagram of the angle adjusting assembly structure of the present application; Figure 5 It is a sectional view of the structure of the second fixed plate of the present application; Figure 6 It is a schematic diagram of the structure of the fixing assembly of the present application; Figure 7 It is a schematic diagram of the size adjusting assembly structure of the present application; Figure 8 is a sectional view of a connecting plate structure of the present application; Figure 9 is an exploded view of two adjacent track module structures of the present application; Figure 10 is a sectional view of a track module structure of the present application; Figure 11 is a schematic view of a support assembly structure of the present application.

[0024] The meanings of the respective reference numerals in the drawings are as follows: 1. track module; 2. connecting assembly; 21. first fixing plate; 22. angle adjusting assembly; 221. fixing block; 222. first sliding block; 223. first compression spring; 224. connecting block; 23. fixing assembly; 231. second fixing plate; 232. second sliding block; 233. clamping block; 234. second compression spring; 3. size adjusting assembly; 31. first connecting plate; 32. second connecting plate; 33. first protruding block; 34. second protruding block; 35. third connecting plate; 36. first screw; 37. second screw; 4. positioning pin; 5. spring; 6. support assembly; 61. support plate; 62. damper; 63. connecting rod; 7. magnetic block; 8. protruding rib. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0027] Example 1 Please refer to Figures 1-10As shown, the purpose of this embodiment is to provide an adaptive multi-segment articulated crawling track for a large-diameter pipe automatic welding machine, including multiple track modules 1. The track modules 1 are arc-shaped, and the multiple track modules 1 are spliced ​​together to form a ring. When using this device, the user first determines the number of track modules 1 according to the pipe size, and then docks the multiple track modules 1. One end of the track module 1 is symmetrically rotated with positioning pins 4. The end of the adjacent track module 1 near the two positioning pins 4 is provided with a connecting hole that matches the two positioning pins 4. The positioning pins 4 are used to position the track module 1. When docking two track modules 1, the user inserts the two positioning pins 4 at one end of one track module 1 into the connecting hole at one end of the other track module 1 to position the two track modules 1. When the track module 1 rotates, it drives the two positioning pins 4 to rotate. The side wall of the positioning pin 4 is symmetrically fixed with springs 5. The springs 5 ​​are used to adjust the angle of the positioning pin 4. Under the pressure of the two springs 5, the positioning pin 4 is perpendicular to one end of the track module 1 in the initial state, so that the positioning pin 4 accurately positions the track module 1 when the two track modules 1 are docked.

[0028] A raised rib 8 is radially arranged on the surface of track module 1. The raised rib serves as a guide rail for the automatic welding equipment, allowing the automatic welding equipment to travel evenly along the centerline of track module 1 via the raised rib. Figure 1 As shown, to facilitate the preset travel trajectory of the automatic welding equipment, the protruding ribs 8 are also arranged in a ring on the surface of the ring-shaped track module 1.

[0029] Please see Figures 1-4 As shown, a connecting component 2 is provided between two adjacent track modules 1. The connecting component 2 is used to connect the two track modules 1. The connecting component 2 includes a first fixing plate 21, which is fixedly installed on the arc-shaped sidewall of one end of one track module 1. Several angle adjustment components 22 are evenly arranged on the side of the first fixing plate 21 away from the track module 1. A fixing component 23 is provided on the arc-shaped sidewall of the other track module 1 near the first fixing plate 21. Both the first fixing plate 21 and the fixing component 23 are located inside the track module 1. 22 is used to connect the first fixing plate 21 to the fixing component 23. The angle adjustment component 22 includes a fixing block 221, which is fixedly disposed on the side of the first fixing plate 21 away from the track module 1. A first slider 222 is provided at one end of the fixing block 221, and one end of the first slider 222 is slidably disposed inside the fixing block 221. Both the fixing block 221 and the first slider 222 are arc-shaped. When the track module 1 rotates, it presses the fixing block 221 and the first slider 222, and the first slider 222 rotates with the rotation of the track module 1.

[0030] Please see Figures 1-5As shown, the one end of the first sliding block 222 is symmetrically fixed with a first compression spring 223 inside the fixed block 221, the end of the first compression spring 223 away from the first sliding block 222 is fixedly connected with the inner wall of the fixed block 221, the first compression spring 223 is used for pressing the one end of the first sliding block 222 to the outside of the fixed block 221, under the pressing of the first compression spring 223, the one end of the first sliding block 222 is located outside the first compression spring 223, the end of the first sliding block 222 away from the fixed block 221 is fixedly provided with a connecting block 224, the fixed assembly 23 comprises a second fixed plate 231, the second fixed plate 231 is fixedly arranged on one side of the track module 1, the inside of the second fixed plate 231 is slidably provided with a second sliding block 232, one end of the second sliding block 232 is fixedly provided with a handle, the handle is arranged on the outside of the second fixed plate 231, after the positioning of the two track modules 1 is completed, the user holds the handle at one end of the second sliding block 232 to pull out the second sliding block 232 from the inside of the second fixed plate 231, the side of the second fixed plate 231 away from the track module 1 and the middle of the second sliding block 232 are both provided with a slot matched with the plurality of connecting blocks 224, under the pressing of the two first compression springs 223, the first sliding block 222 drives the connecting block 224 to move into the slot on one side of the second fixed plate 231.

[0031] Please refer to Figures 1-6 As shown, after the connecting block 224 moves into the slot on one side of the second fixed plate 231, the user inserts the second sliding block 232 into the inside of the second fixed plate 231 again, the slot of the second sliding block 232 is symmetrically slidably provided with a clamping block 233, the two clamping blocks 233 are used for fixing the connecting block 224 inside the second fixed plate 231, when the connecting block 224 completely enters the inside of the second fixed plate 231, the clamping block 233 is located at the end of the first sliding block 222 close to the connecting block 224, when the second sliding block 232 is inserted into the inside of the second fixed plate 231, the clamping block 233 gradually contacts the end of the first sliding block 222 close to the connecting block 224, the surface of the clamping block 233 contacting the first sliding block 222 is an inclined surface, when the clamping block 233 contacts the first sliding block 222, the first sliding block 222 pushes away the two clamping blocks 233, then the first sliding block 222 enters the slot of the second sliding block 232 and is located between the two clamping blocks 233, the side of the two clamping blocks 233 away from each other is symmetrically fixedly provided with a second compression spring 234 used for pressing the clamping block 233, the end of the second compression spring 234 away from the clamping block 233 is fixedly connected with the second sliding block 232, under the extrusion of the two second compression springs 234, the two clamping blocks 233 are both in close contact with the first sliding block 222, and the connecting block 224 is clamped and fixed inside the second fixed plate 231, so that the first fixed plate 21 and the second fixed plate 231 are completely connected.

[0032] Please refer to Figures 1-8As shown, two track modules 1 located at both ends are provided with a size adjusting assembly 3, the size adjusting assembly 3 comprises a first connecting plate 31, the first connecting plate 31 is rotationally connected with a track module 1, a second connecting plate 32 is arranged on the side of the first connecting plate 31 away from the track module 1, a first protruding block 33 is fixedly arranged on the side of the second connecting plate 32 close to the first connecting plate 31, and the first protruding block 33 is slidingly arranged in the first connecting plate 31. After the butt joint of the plurality of track modules 1 is completed, the user adjusts the length of the part of the first protruding block 33 in the first connecting plate 31 according to the size of the pipeline to finely adjust the size of the device, so that the size of the device is consistent with the size of the pipeline.

[0033] Please refer to Figures 1-11 As shown, after the size of the device is adjusted, the user places the device on the pipeline, the inner side of the track module 1 is provided with a supporting assembly 6, the supporting assembly 6 is arranged between the two connecting assemblies 2, the supporting assembly 6 is used for supporting the track module 1, the supporting assembly 6 comprises two supporting plates 61, the two supporting plates 61 are symmetrically arranged on one side of the track module 1, and a damper 62 for fixing the supporting plate 61 is fixedly arranged between the supporting plate 61 and the track module 1, the supporting plate 61 can be bent, after the device is placed on the pipeline, the supporting plate 61 is in contact with the surface of the pipeline and is bent according to the shape of the pipeline until it is completely fitted with the pipeline, the damper 62 gradually expands and contracts with the bending and movement of the supporting plate 61 until the position of the supporting plate 61 is stable, in order to enhance the stability of the supporting plate 61, a connecting rod 63 for connecting the two supporting plates 61 is fixedly arranged between the two supporting plates 61, a plurality of magnetic blocks 7 are fixedly arranged on the side of the track module 1 close to the supporting plate 61, after the device is placed on the pipeline, the magnetic blocks 7 are adsorbed on the surface of the pipeline to fix the track module 1.

[0034] Please refer to Figures 1-8As shown, the second connecting plate 32 is fixedly provided with a second protruding block 34 away from one side of the first connecting plate 31, the second protruding block 34 is provided with a third connecting plate 35 away from one side of the second connecting plate 32, the third connecting plate 35 is rotatably connected with one track module 1, the third connecting plate 35 is provided with a notch matched with the second protruding block 34 on one side close to the second protruding block 34, the third connecting plate 35 is used for fixing the second protruding block 34, the first connecting plate 31 and the third connecting plate 35 are both arc-shaped, after the device is adsorbed on the pipeline, the user inserts the second protruding block 34 into one end of the third connecting plate 35, the first connecting plate 31 and the third connecting plate 35 are respectively threadedly connected with a first screw 36 and a second screw 37 on the arc-shaped sidewalls, in order to enhance the friction between the first screw 36 and the second screw 37 and the first protruding block 33 and the second protruding block 34, the first screw 36 and the second screw 37 are both embedded with rubber on one end inside the first connecting plate 31 and the third connecting plate 35, the first screw 36 and the second screw 37 are respectively used for fixing the first protruding block 33 and the second protruding block 34, after the second protruding block 34 is inserted into one end of the third connecting plate 35, the user tightens the second screw 37 to extrude and fix the second protruding block 34, after the position of the first protruding block 33 is adjusted, the user tightens the first screw 36 to extrude and fix the first protruding block 33.

[0035] Please refer to Figures 1-8 As shown, when the device is moved, the user loosens the second screw 37 and pulls out the second protruding block 34 from the inside of the third connecting plate 35, then the user pulls down the plurality of track modules 1 from the pipeline and moves to the designated position, when passing through the support on the pipeline, the user takes down the device and crosses the support position, then the user inserts the second protruding block 34 into the third connecting plate 35 and tightens the second screw 37 to fix the second protruding block 34, without repeatedly disassembling and assembling the device.

[0036] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application, various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An adaptive multi-segment articulated large-diameter pipeline automatic welding machine crawling track, comprising a plurality of track modules (1), the track modules (1) are arc-shaped, and a plurality of the track modules (1) are spliced together to form a ring shape, characterized in that: Two adjacent track modules (1) are provided with a connecting assembly (2) for connecting two track modules (1), and two track modules (1) at two ends are provided with a size adjusting assembly (3), the connecting assembly (2) comprises a first fixed plate (21) fixedly arranged on the arc-shaped side wall at one end of one track module (1), a plurality of angle adjusting assemblies (22) are uniformly arranged on the side of the first fixed plate (21) away from the track module (1), and a fixing assembly (23) is arranged on the arc-shaped side wall at one end of the other track module (1) close to the first fixed plate (21), the angle adjusting assembly (22) is used for connecting the first fixed plate (21) and the fixing assembly (23), and the first fixed plate (21) and the fixing assembly (23) are arranged on the inner side of the track module (1), at least one convex rib (8) is arranged on the surface of the track module (1) in the radial direction, and the convex rib is used as a guide rail of an automatic welding device, so that the automatic welding device walks along the center line of the track module (1) through the convex rib.

2. The adaptive multi-segment articulated large diameter pipe automatic welder creeper track of claim 1, wherein: The angle adjusting assembly (22) comprises a fixed block (221) fixedly arranged on the side of the first fixed plate (21) away from the track module (1), one end of the fixed block (221) is provided with a first sliding block (222), one end of the first sliding block (222) is slidingly arranged in the fixed block (221), and the fixed block (221) and the first sliding block (222) are both arc-shaped.

3. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track according to claim 2, characterized in that: One end of the first sliding block (222) in the fixed block (221) is fixedly provided with a first compression spring (223) symmetrically left and right, one end of the first compression spring (223) away from the first sliding block (222) is fixedly connected with the inner wall of the fixed block (221), the first compression spring (223) is used for pressing one end of the first sliding block (222) to the outside of the fixed block (221), and one end of the first sliding block (222) away from the fixed block (221) is fixedly provided with a connecting block (224).

4. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track of claim 1, wherein: The fixing assembly (23) comprises a second fixed plate (231) fixedly arranged on one side of the track module (1), a second sliding block (232) slidingly arranged in the second fixed plate (231), a plurality of grooves matched with the connecting blocks (224) are formed in the side of the second fixed plate (231) away from the track module (1) and the middle of the second sliding block (232), a handle is fixedly arranged at one end of the second sliding block (232), and the handle is arranged on the outer side of the second fixed plate (231).

5. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track of claim 4, wherein: Two clamping blocks (233) are symmetrically arranged in the notches of the second sliding block (232) and are used to fix the connecting block (224) inside the second fixed plate (231). The two clamping blocks (233) are symmetrically fixed on the sides away from each other and are provided with second compression springs (234) for pressing the clamping blocks (233). The ends of the second compression springs (234) away from the clamping blocks (233) are fixedly connected with the second sliding block (232).

6. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track of claim 1, wherein: The size adjusting assembly (3) comprises a first connecting plate (31) which is rotationally connected with a track module (1). The side of the first connecting plate (31) away from the track module (1) is provided with a second connecting plate (32). The side of the second connecting plate (32) close to the first connecting plate (31) is fixedly provided with a first protruding block (33) which is slidingly arranged inside the first connecting plate (31). The side of the second connecting plate (32) away from the first connecting plate (31) is fixedly provided with a second protruding block (34). The side of the second protruding block (34) away from the second connecting plate (32) is provided with a third connecting plate (35) which is rotationally connected with a track module (1). The side of the third connecting plate (35) close to the second protruding block (34) is provided with a notch which is matched with the second protruding block (34). The third connecting plate (35) is used for fixing the second protruding block (34). The first connecting plate (31) and the third connecting plate (35) are both arc-shaped.

7. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawler track of claim 6, wherein: The arc-shaped side walls of the first connecting plate (31) and the third connecting plate (35) are respectively threadedly connected with a first screw (36) and a second screw (37). The ends of the first screw (36) and the second screw (37) inside the first connecting plate (31) and the third connecting plate (35) are respectively embedded with rubbers. The first screw (36) and the second screw (37) are respectively used for fixing the first protruding block (33) and the second protruding block (34).

8. The adaptive multi-segment articulated large diameter pipe automatic welder creeper track of claim 1, wherein: The track module (1) is rotationally provided with a positioning pin (4) at one end. The other track module (1) adjacent to the two positioning pins (4) is provided with connecting holes which are matched with the two positioning pins (4) at one end. The positioning pins (4) are used for positioning the track module (1). The side walls of the positioning pins (4) are fixedly provided with springs (5) which are symmetrically arranged upwards and downwards. The springs (5) are used for adjusting the angle of the positioning pins (4).

9. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track of claim 1, wherein: The inner side of the track module (1) is provided with a supporting assembly (6) which is arranged between the two connecting assemblies (2). The supporting assembly (6) is used for supporting the track module (1). The supporting assembly (6) comprises two supporting plates (61) which are symmetrically arranged on the side of the track module (1). The supporting plates (61) can be bent.

10. The adaptive multi-segment articulated heavy wall pipe automatic welding machine crawling track of claim 9, wherein: The support plate (61) and the track module (1) are fixedly provided with dampers (62) for fixing the support plate (61) symmetrically left and right, and the two support plates (61) are fixedly provided with connecting rods (63) for connecting the two support plates (61) symmetrically left and right, and the track module (1) is fixedly provided with a plurality of magnetic blocks (7) on the side close to the support plate (61).

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