A kind of thick wall carbon steel pipe sectional welding sequence self-adaptive deformation control processing equipment

Abstract

The present application belongs to the technical field of welding equipment, especially a thick-walled carbon steel pipe segmented welding sequence self-adaptive deformation control processing equipment. In view of the problem that the positioning correction is not in place when welding pipe fittings on site in the prior art, which easily leads to poor welding quality, the following scheme is proposed, which includes a mobile end sleeve seat and a fixed end sleeve seat. The circumferential outer wall of the mobile end sleeve seat and the fixed end sleeve seat is provided with three centering extrusion mechanisms that are centrally symmetrically distributed. The centering extrusion mechanism includes a twist-proof top rod that can slide towards the center line and can be locked at any time. The circumferential outer wall of the mobile end sleeve seat and the fixed end sleeve seat are connected by two parallel rod-shaped connecting parts. The present application can fix the coaxial center of the base pipe and the pipe to be welded before welding, and the roundness detection mechanism can be rotated at any time during the welding process to detect whether the coaxial center of the base pipe and the pipe to be welded is continuously maintained, so that timely correction can be performed to ensure the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an adaptive deformation processing equipment for segmented welding of thick-walled carbon steel pipes. Background Technology

[0002] In the field of metal cutting and welding equipment manufacturing, with the continuous development of automatic and semi-automatic electric arc and plasma arc welding machines, these equipment are now widely used in the processing of thick-walled carbon steel pipes in petrochemical and power plant applications. Thick-walled carbon steel pipes require a large heat input for multi-layer, multi-pass welding, and uneven thermal shrinkage can easily lead to axial bending, radial misalignment, and other deformations, directly reducing pipe sealing and assembly accuracy. Existing welding and cutting equipment only has basic welding and cutting functions; the welding segment sequence relies on manual experience for planning, and the tooling is mostly rigid clamping, making it impossible to monitor pipe deformation in real time and dynamically adjust the welding process.

[0003] Traditional processing methods employ fixed segmented welding, applying the same welding sequence to pipes of different diameters and wall thicknesses. This leads to continuous accumulation of thermal stress, requiring post-weld flame straightening and mechanical shaping. The process is cumbersome, inefficient, and prone to generating secondary residual stress during straightening. Commercially available automatic and semi-automatic electric arc welding machines and plasma arc equipment lack deformation closed-loop control modules, failing to adaptively switch the segmented welding sequence based on real-time deformation data of the pipes, thus failing to meet the high-precision manufacturing requirements of high-pressure thick-walled carbon steel pipes. Therefore, there is an urgent need to develop adaptive deformation control processing equipment for segmented welding of thick-walled carbon steel pipes to fill the technological gap in active deformation control of existing welding and cutting equipment. Summary of the Invention

[0004] To overcome the problem of poor welding quality caused by inadequate positioning and correction during on-site welding of pipe fittings in existing technologies, the present invention aims to provide a welding device capable of rapidly positioning and correcting pipe fittings to be welded on-site. This invention provides an adaptive deformation control processing device for segmented welding of thick-walled carbon steel pipes, comprising a movable end sleeve and a fixed end sleeve. Three symmetrically distributed concentric extrusion mechanisms are provided on the outer circumference of both the movable and fixed end sleeves. Each concentric extrusion mechanism includes an anti-torsion rod that can slide towards the centerline and be locked at any time. Two parallel rod-shaped connecting parts are connected between the outer circumference of the movable and fixed end sleeves. Each rod-shaped connecting part includes an inner sliding rod and a sleeve. A common anti-detachment slide rail is slidably connected between the two inner sliding rods. An inner rotating ring is rotatably connected inside the anti-detachment slide rail. Two mounting parts are provided on the side of the inner rotating ring away from the bottom of the groove. A roundness detection mechanism and a welding auxiliary fixing part are respectively fixed on the two mounting parts. The roundness detection mechanism includes a C-shaped fixing member, and the C-shaped fixing member includes a telescopic rod slidably connected to the C-shaped fixing member with its tip close to the outer wall of the pipe to be welded.

[0005] Preferably, the C-shaped fastener includes two parallel side plates, with a back plate between the two side plates. The back plate is fixed to the mounting surface of the inner rotating ring by bolts. A sliding bearing II is embedded in the middle of the side plate near the pipe to be welded, and the main tube of the telescopic rod is slidably connected in the sliding bearing II. A metal top plate is fixed to one end of the main tube of the telescopic rod near the other side plate, and a compression spring II is fixed between the metal top plate and the side plate where the sliding bearing II is located. An internal thread is opened on the inner wall of the end of the main tube away from the metal top plate, and a detection contact rod is screwed to the end of the main tube near the internal thread.

[0006] Preferably, a metal touch sensor and an audible and visual alarm are fixed on the inner and outer sides of the side plate away from the telescopic rod of the C-shaped fastener, respectively; a ball is embedded at the end of the detection rod; when the roundness detection mechanism rotates for detection, if a certain position is warped due to welding or does not coincide with the set axis, the detection rod will be immediately triggered, which in turn triggers the audible and visual alarm.

[0007] Preferably, the rod-shaped connecting part includes an inner sliding rod fixed to the outer wall of the fixed end sleeve near the edge, and a tension spring fixed to the other end of the inner sliding rod. The sleeve part includes a tube slidably connected to the end of the inner sliding rod. The other end of the tension spring is fixed to the bottom inner wall of the tube, and a positioning bolt is screwed to the outer circumference of the tube near the tube opening. A positioning hole with a diameter matching the positioning bolt is opened at the end of the outer circumference of the inner sliding rod near the tension spring. The end of the tube away from the inner sliding rod is fixed to the outer wall of the movable end sleeve.

[0008] Preferably, the welding auxiliary fixing part includes a deformable support rod fixed to the surface of another mounting part on the surface of the inner rotating ring, and an elastic retaining ring is fixed to the end of the deformable support rod away from the mounting part, and a welding gun module is engaged in the elastic retaining ring; when welding, the welding gun module can be simply placed in the elastic retaining ring, and the inner rotating ring can be slowly rotated, and the weld can be accurately welded in conjunction with the automatic wire feeding mechanism, which is labor-saving, precise and has a stable welding distance.

[0009] Preferably, both the mobile end sleeve and the fixed end sleeve have three centrally symmetrical stepped cross-sections on their outer circumferential walls, and the number of stepped cross-sections is the same as the number of the centering extrusion mechanism. The centering extrusion mechanism also includes an irregularly shaped shaft frame fixed on the stepped cross-sections. The irregularly shaped shaft frame includes two arc-shaped wing rods, and a connecting plate is reserved in the middle of the two arc-shaped wing rods. A worm gear rotating hole is opened in the middle of the connecting plate, and a worm gear is rotatably connected in the worm gear rotating hole. Limiting rings are fixed on both sides of the outer wall of the worm gear on the connecting plate. A long shaft is rotatably connected between the ends of the two arc-shaped wing rods away from the connecting plate. The axis of the long shaft is horizontally set, and the middle of the long shaft... An intermediate worm gear is fixed and meshes with the worm. Both ends of the long shaft are fixed with driven gears of the same size. An oblique through hole is opened in the middle of the stepped cross section, which is obliquely inserted into the inner side of the moving end sleeve. The worm is rotatably connected in the oblique through hole and does not contact its inner wall. The moving end sleeve and the fixed end sleeve have protruding ear plates reserved on the opposite side near the stepped cross section. The outer circumference of the moving end sleeve and the fixed end sleeve are provided with anti-torsion insertion holes on both sides away from each stepped cross section. The anti-torsion push rod is slidably connected in the anti-torsion insertion hole. The outer circumference of the anti-torsion push rod is provided with teeth that mesh with the driven gear on the side near the driven gear.

[0010] Preferably, all anti-torsion top rods are fixed with an arc-shaped pressure plate at one end near the pipe fitting to be welded, which can change the point contact to line contact when fixing the pipe fitting or base pipe at the beginning, thus improving the overall stability; and the inner walls of the moving end sleeve and the fixed end sleeve are provided with a shoulder-cutting installation platform near the opening of the oblique through hole, and a limiting plate is fixed on the shoulder-cutting installation platform to prevent the worm from deviating, ensuring stable meshing between the worm and the intermediate worm wheel.

[0011] Preferably, the outer wall of the anti-torsion push rod is provided with a scale, and the drive end of the worm gear is provided with a rocker handle, on which a positioning pin is provided to limit the rotation of the worm gear; the infeed and outfeed of the anti-torsion push rod can be precisely controlled.

[0012] Preferably, the outer circumferential walls of the movable end sleeve and the fixed end sleeve are provided with stepped mounting holes between two adjacent stepped cross-sections, and each stepped mounting hole is fitted with a sliding bearing. Each sliding bearing is slidably connected with a T-shaped top rod, and a roller frame is fixed to the adjacent end of each T-shaped top rod. The roller frame is provided with grooved rollers, and a compression spring is fixed between the roller frame and the inner wall of the movable end sleeve or the fixed end sleeve. This spring can be engaged with the outer circumferential wall of the base pipe or the pipe fitting to be welded, so that the entire equipment can be rolled to the next welding position after welding is completed.

[0013] Preferably, the inner sides of the movable end sleeve and the fixed end sleeve are provided with spring grooves for fixing the compression spring one near each stepped mounting hole; this serves to fix the compression spring one and saves space.

[0014] The beneficial effects of this invention are as follows: 1. By setting two concentric extrusion mechanisms and a telescopic rod that can rotate on the outer wall of the pipe to be welded, the base pipe and the pipe to be welded can be fixed coaxially before welding. Moreover, during the welding process, the roundness detection mechanism can be rotated at any time to check whether the base pipe and the pipe to be welded continue to maintain coaxiality, so that timely correction can be made to ensure welding quality.

[0015] 2. By setting an adjustable detection contact rod with a compression spring, the roundness of pipe fittings of different diameters can be detected. The detection accuracy can also be adjusted by changing the distance between the detection contact rod and the outer wall of the pipe fitting. When the roundness detection mechanism is rotating, if a certain position is raised due to welding or does not coincide with the set axis, the detection contact rod will be triggered immediately, which will then trigger the audible and visual alarm.

[0016] 3. By using the inner sliding rod and sleeve, along with the tension spring, the two objects being welded can be forced together during welding, preventing tearing of the weld due to uneven heating and cooling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention during welding; Figure 2 This is a top view of the invention during welding; Figure 3 This is a side view of the invention during welding; Figure 4 This is a schematic diagram of the overall structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of the fixed end sleeve in this invention; Figure 6 This is a schematic diagram of the structure of the fixed end sleeve in this invention; Figure 7 This is a cross-sectional view of the fixed end sleeve in this invention; Figure 8 This is a three-dimensional structural diagram of the core-extrusion mechanism of the present invention; Figure 9 This is a three-dimensional structural diagram of the irregular shaft bracket in this invention; Figure 10 This is a half-sectional schematic diagram of the roundness detection mechanism in this invention; Figure 11 This is a half-sectional view of the connecting rod in this invention.

[0018] In the diagram: 1. Moving end sleeve; 2. Protruding ear plate; 3. Centering extrusion mechanism; 301. Anti-torsion top rod; 302. Irregular shaft bracket; 303. Long shaft; 304. Intermediate worm gear; 305. Limiting plate; 306. Limiting ring; 307. Worm; 308. Driven gear; 309. Worm rotating hole; 4. Sleeve part; 401. Tube; 402. Tension spring; 403. Positioning bolt; 5. Welding torch module; 6. Welding auxiliary fixing part; 7. Inner rotating ring; 8. Inner sliding rod; 801. Positioning hole; 9. T-shaped top rod; 10. 11. Fixed end sleeve; 11. Roundness detection mechanism; 1101. C-shaped fastener; 1102. Telescopic rod; 1103. Sliding bearing II; 1104. Compression spring II; 1105. Metal top plate; 1106. Metal touch sensor; 1107. Audible and visual alarm; 12. Anti-detachment slide rail; 13. Pipe fitting to be welded; 14. Roller frame; 15. Sliding bearing I; 16. Compression spring I; 17. Stepped mounting hole; 18. Spring groove; 19. Anti-torsion insertion hole; 20. Stepped cut surface; 21. Angled through hole; 22. Shoulder-cut mounting platform. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In this embodiment, refer to Figures 1-11An adaptive deformation processing device for segmented welding of thick-walled carbon steel pipes includes a movable end sleeve 1 and a fixed end sleeve 10, both symmetrically arranged in annular structures. Three centrally symmetrically distributed concentric extrusion mechanisms 3 are provided on the outer circumference of both the movable end sleeve 1 and the fixed end sleeve 10. Each concentric extrusion mechanism 3 includes an anti-torsion rod 301 that can slide towards the centerline and be locked at any time. The centerline is the axis of the movable end sleeve 1 or the fixed end sleeve 10, used to fix it to the outer wall of the base pipe or the pipe fitting to be welded 13. Two parallel rod-shaped connecting parts are connected between the outer circumference of the movable end sleeve 1 and the fixed end sleeve 10. The two rod-shaped connecting parts are centrally symmetrically distributed and include an inner sliding rod 8 and a sleeve portion 4. A common anti-detachment slide rail 12 is slidably connected between the two inner sliding rods 8. The opening of the anti-detachment slide rail 12... Facing to the side, the anti-detachment slide rail 12 is internally rotatably connected to an inner rotating ring 7 with an annular structure. The inner rotating ring 7 is provided with two mounting parts on the side away from the bottom of the groove. The two mounting parts are respectively fixed with a roundness detection mechanism 11 and a welding auxiliary fixing part 6. The roundness detection mechanism 11 includes a C-shaped fixing part 1101, and the C-shaped fixing part 1101 includes a telescopic rod 1102 that is slidably connected to the C-shaped fixing part 1101 and whose tip is close to the outer wall of the pipe fitting 13 to be welded. By setting two concentric extrusion mechanisms 3 and a telescopic rod 1102 that can rotate on the outer wall of the pipe fitting 13 to be welded, the base pipe and the pipe fitting 13 to be welded can be coaxially fixed before welding. Moreover, during the welding process, the roundness detection mechanism 11 can be rotated at any time to detect whether the base pipe and the pipe fitting 13 to be welded continue to maintain coaxiality, so that timely correction can be made to ensure the welding quality.

[0021] Reference Figure 1 and Figure 10 The C-shaped fastener 1101 includes two parallel side plates with a back plate between them. The back plate is fixed to the mounting surface of the inner rotating ring 7 by bolts. A sliding bearing 1103 is embedded in the middle of the side plate near the pipe to be welded 13, and the main tube of the telescopic rod 1102 is slidably connected in the sliding bearing 1103. A metal top plate 1105 is fixed to the end of the main tube of the telescopic rod 1102 near the other side plate, and a compression spring 1104 is fixed between the metal top plate 1105 and the side plate where the sliding bearing 1103 is located. An internal thread is opened on the inner wall of the end of the main tube away from the metal top plate 1105, and a detection contact rod is screwed to the end of the main tube near the internal thread. By setting the detection contact rod with adjustable extension range, and in conjunction with the compression spring 1104, the roundness of the pipe to be welded 13 with different diameters can be detected. The detection accuracy can also be adjusted by changing the distance between the detection contact rod and the outer wall of the pipe to be welded 13.

[0022] Reference Figure 10A metal touch sensor 1106 and an audible and visual alarm 1107 are respectively fixed on the inner and outer sides of the side plate away from the telescopic rod 1102 of the C-shaped fastener 1101; a ball is embedded in the end of the detection rod; through the metal touch sensor 1106, when the roundness detection mechanism 11 is rotating for detection, if a certain position is raised due to welding or does not coincide with the set axis, the detection rod will be immediately triggered, and then the audible and visual alarm 1107 will be triggered.

[0023] Reference Figure 4 and Figure 11 The rod-shaped connecting part includes an inner sliding rod 8 fixed to the outer wall of the fixed end sleeve 10 near the edge, and a tension spring 402 fixed to the other end of the inner sliding rod 8. The sleeve part 4 includes a tube 401 slidably connected to the end of the inner sliding rod 8. The other end of the tension spring 402 is fixed to the bottom inner wall of the tube. A positioning bolt 403 is screwed onto the outer circumference of the tube 401 near the tube opening. A positioning hole 801 with a diameter matching the positioning bolt 403 is opened at the end of the outer circumference of the inner sliding rod 8 near the tension spring 402. The end of the tube 401 away from the inner sliding rod 8 is fixed to the outer wall of the moving end sleeve 1. Through the inner sliding rod 8 and the sleeve part 4, and with the tension spring 402 pulling on both, the two welding objects can have a tendency to squeeze towards the middle during welding, preventing tearing of the welded part due to uneven heating and cooling.

[0024] Reference Figure 2 and Figure 4 The welding auxiliary fixing part 6 includes a deformable support rod fixed to the surface of another mounting part on the surface of the inner rotating ring 7, and an elastic retaining ring is fixed to the end of the deformable support rod away from the mounting part. The welding gun module 5 is engaged in the elastic retaining ring. With the welding auxiliary fixing part 6, when welding, the welding gun module 5 can be placed in the elastic retaining ring, and the inner rotating ring 7 can be slowly rotated. With the help of the automatic wire feeding mechanism, the weld can be accurately welded, which is labor-saving, precise and has a stable welding distance.

[0025] Reference Figures 3-8Both the moving end sleeve 1 and the fixed end sleeve 10 have three centrally symmetrical stepped cross-sections 20 on their outer circumferential walls. The number of stepped cross-sections 20 is the same as the number of the centering extrusion mechanism 3. The centering extrusion mechanism 3 also includes a special-shaped shaft frame 302 fixed on the stepped cross-sections 20. The special-shaped shaft frame 302 includes two arc-shaped wing rods, and a connecting plate is reserved in the middle of the two arc-shaped wing rods. A worm gear rotating hole 309 is opened in the middle of the connecting plate. A worm gear 307 is rotatably connected in the worm gear rotating hole 309. Limiting rings 306 are fixed on both sides of the outer wall of the worm gear 307 located on the connecting plate. A long shaft 303 is rotatably connected between the ends of the two arc-shaped wing rods away from the connecting plate. The axis of the long shaft 303 is set horizontally, and an intermediate worm wheel 304 that meshes with the worm gear 307 is fixed in the middle of the long shaft 303. Both ends of the long shaft 303 are fixed with driven gears 308 of the same size. A slanted through hole 21 is provided in the middle of the 20, which is inserted into the inner side of the moving end sleeve 1. The worm gear 307 is rotatably connected in the slanted through hole 21 and does not contact its inner wall. Protruding ear plates 2 are reserved on the opposite side of the moving end sleeve 1 and the fixed end sleeve 10 near the stepped cut surface 20. Anti-twist insertion holes 19 are provided on both sides of the outer circumference of the moving end sleeve 1 and the fixed end sleeve 10 away from each stepped cut surface 20. Anti-twist top rods 301 are slidably connected in the anti-twist insertion holes 19. The outer circumference of the anti-twist top rods 301 near the driven gear 308 is provided with teeth that mesh with the driven gear 308. Through the set concentric extrusion mechanism 3, not only can the base pipe and the pipe to be welded 13 be relatively fixed before welding, but also can be fixed in a concentric state with the roundness detection mechanism 11. It can also be used to fix welding objects of different diameters in a concentric manner, which improves the applicability of the device.

[0026] Reference Figures 6-8 All anti-torsion rods 301 have an arc-shaped pressure plate fixed at one end near the pipe fitting 13 to be welded. This can change the point contact to line contact when fixing the pipe fitting 13 or the base pipe at the beginning, thus improving the overall stability. In addition, the inner walls of the moving end sleeve 1 and the fixed end sleeve 10 are provided with a shoulder-cutting installation platform 22 near the opening of the oblique through hole 21. A limiting plate 305 is fixed on the shoulder-cutting installation platform 22 to prevent the worm 307 from running off-center, ensuring the stable meshing of the worm 307 and the intermediate worm wheel 304.

[0027] Reference Figure 8 The outer wall of the anti-torsion push rod 301 is provided with a scale, and the drive end of the worm gear 307 is provided with a rocker handle, on which a positioning pin is provided to limit the rotation of the worm gear 307; the infeed and outfeed of the anti-torsion push rod 301 can be precisely controlled.

[0028] Reference Figures 3-8The outer circumferential walls of the moving end sleeve 1 and the fixed end sleeve 10 are provided with stepped mounting holes 17 between two adjacent stepped cross-sections 20. Each stepped mounting hole 17 is fitted with a sliding bearing 15. Each sliding bearing 15 is slidably connected with a T-shaped top rod 9. Each T-shaped top rod 9 is fixed with a roller frame 14 at the adjacent end. The roller frame 14 is provided with grooved rollers. A compression spring 16 is fixed between the roller frame 14 and the inner wall of the moving end sleeve 1 or the fixed end sleeve 10. It can be snapped onto the outer circumferential wall of the base pipe or the pipe fitting 13 to be welded, so that the whole equipment can be rolled to the next welding position after welding is completed.

[0029] Reference Figure 3 and Figure 6 The inner sides of the mobile end sleeve 1 and the fixed end sleeve 10 are provided with spring grooves 18 for fixing the compression spring 16 near each stepped mounting hole 17; these grooves serve to fix the compression spring 16 and save space.

[0030] Working principle: Before use, pull the two sleeve parts 4 to the locking position of the positioning bolt 403 and the positioning hole 801. First, put the fixed end sleeve 10 in the device onto the base pipe near the pipe opening. Then, operate the three centering extrusion mechanisms 3 in the fixed end sleeve 10 to make the three anti-torsion top rods 301 extend to the same length and clamp the base pipe. Then, turn the inner rotating ring 7 to see if the audible and visual alarm 1107 in the roundness detection mechanism 11 sounds an alarm. Then, pass the pipe fitting 13 to be welded through the middle of the moving end sleeve 1 and connect it with the base pipe. After the pipe ends of the base pipe are connected, the three centering compression mechanisms 3 in the moving end sleeve 1 are operated to make the three anti-torsion top rods 301 extend to the same length until the pipe to be welded 13 is clamped. Then the anti-detachment slide rail 12 is moved to the side close to the moving end sleeve 1 for roundness detection. After centering, the moving sleeve 1 and the pipe to be welded 13 are relatively fixed. Finally, the positioning bolts 403 are loosened so that the base pipe and the pipe to be welded 13 are axially compressed. Then the position of the welding gun module 5 can be adjusted and the welding equipment can be turned on for welding.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A thick-walled carbon steel pipe segment welding sequence adaptive deformation processing equipment, comprising a moving end sleeve (1) and a fixed end sleeve (10), characterized in that, The outer circumferential walls of both the movable end sleeve (1) and the fixed end sleeve (10) are provided with three centrally symmetrically distributed concentric extrusion mechanisms (3), and the concentric extrusion mechanism (3) includes an anti-torsion top rod (301) that can slide towards the center line and can be locked at any time; the outer circumferential walls of the movable end sleeve (1) and the fixed end sleeve (10) are connected by two parallel rod-shaped connecting parts, and the rod-shaped connecting parts include an inner sliding rod (8) and a sleeve part (4), and the two inner sliding rods (8) are slidably connected by the same The anti-detachment slide rail (12) has an inner rotating ring (7) rotatably connected inside. The inner rotating ring (7) has two mounting parts on the side away from the bottom of the groove. The two mounting parts are respectively fixed with a roundness detection mechanism (11) and a welding auxiliary fixing part (6). The roundness detection mechanism (11) includes a C-shaped fixing part (1101), and the C-shaped fixing part (1101) includes a telescopic rod (1102) that is slidably connected to the C-shaped fixing part (1101) and whose tip is close to the outer wall of the pipe fitting (13) to be welded.

2. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, The C-shaped fastener (1101) includes two parallel side plates, with a back plate between the two side plates. The back plate is fixed to the mounting surface of the inner rotating ring (7) by bolts. A sliding bearing (1103) is embedded in the middle of the side plate near the pipe to be welded (13), and the main tube of the telescopic rod (1102) is slidably connected in the sliding bearing (1103). A metal top plate (1105) is fixed at one end of the main tube of the telescopic rod (1102) near the other side plate, and a compression spring (1104) is fixed between the metal top plate (1105) and the side plate where the sliding bearing (1103) is located. An internal thread is opened on the inner wall of the end of the main tube away from the metal top plate (1105), and a detection contact rod is screwed to the end of the main tube near the internal thread.

3. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 2, characterized in that, Metal touch sensor (1106) and audible and visual alarm (1107) are respectively fixed on the inner and outer sides of the side plate of the C-shaped fastener (1101) away from the telescopic rod (1102).

4. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, The rod-shaped connecting part includes an inner slide rod (8) fixed to the outer wall of the fixed end sleeve (10) near the edge, and a tension spring (402) fixed to the other end of the inner slide rod (8). The sleeve part (4) includes a tube (401) slidably connected to the end of the inner slide rod (8). The other end of the tension spring (402) is fixed to the bottom inner wall of the tube. A positioning bolt (403) is screwed to the outer circumference of the tube (401) near the tube opening. A positioning hole (801) with a diameter matching the positioning bolt (403) is opened at one end of the outer circumference of the inner slide rod (8) near the tension spring (402). The end of the tube (401) away from the inner slide rod (8) is fixed to the outer wall of the moving end sleeve (1).

5. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, The welding auxiliary fixing part (6) includes a deformable support rod fixed to the surface of another mounting part on the surface of the inner rotating ring (7), and an elastic retaining ring is fixed to one end of the deformable support rod away from the mounting part, and a welding gun module (5) is engaged in the elastic retaining ring.

6. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, The outer circumferential walls of both the mobile end sleeve (1) and the fixed end sleeve (10) are provided with three centrally symmetrical stepped cross-sections (20), and the number of stepped cross-sections (20) is the same as the number of the centering extrusion mechanism (3). The centering extrusion mechanism (3) also includes a special-shaped shaft frame (302) fixed on the stepped cross-sections (20). The special-shaped shaft frame (302) includes two arc-shaped wing rods, and a connecting plate is reserved in the middle of the two arc-shaped wing rods. A worm gear rotating hole (309) is opened in the middle of the connecting plate. A worm gear (307) is rotatably connected in the worm gear rotating hole (309), and a limit ring (306) is fixed on both sides of the outer wall of the worm gear (307) on the connecting plate. A long shaft (303) is rotatably connected between the ends of the two arc-shaped wing rods away from the connecting plate. The axis of the long shaft (303) is set horizontally, and a worm gear (307) is fixed in the middle of the long shaft (303). The intermediate worm gear (304) meshes with each other, and both ends of the long shaft (303) are fixed with driven gears (308) of the same size. The stepped cross section (20) has an oblique through hole (21) that obliquely penetrates into the inner side of the moving end sleeve (1). The worm (307) is rotatably connected in the oblique through hole (21) and does not contact its inner wall. The moving end sleeve (1) and the fixed end sleeve (10) are located on opposite sides near the stepped cross section (20). A protruding ear plate (2) is reserved at each of the 0 positions, and anti-twist insertion holes (19) are provided on both sides of the moving end sleeve (1) and the fixed end sleeve (10) away from each step section (20). The anti-twist top rod (301) is slidably connected in the anti-twist insertion hole (19). The circumferential outer wall of the anti-twist top rod (301) is provided with teeth that mesh with the driven gear (308) on the side close to the driven gear (308).

7. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, All anti-torsion top rods (301) are fixed with an arc-shaped pressure plate at one end near the pipe fitting (13) to be welded; and the inner walls of the moving end sleeve (1) and the fixed end sleeve (10) are provided with a shoulder cutting installation platform (22) near the opening of the oblique through hole (21), and a limit plate (305) to prevent the worm gear (307) from running off is fixed on the shoulder cutting installation platform (22).

8. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 6, characterized in that, The outer wall of the anti-torsion top rod (301) is provided with a scale, and the drive end of the worm gear (307) is provided with a rocker handle, on which a positioning pin is provided to limit the rotation of the worm gear (307).

9. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 1, characterized in that, The outer circumferential walls of the movable end sleeve (1) and the fixed end sleeve (10) are provided with stepped mounting holes (17) between two adjacent stepped cross sections (20), and each stepped mounting hole (17) is fitted with a sliding bearing (15). Each sliding bearing (15) is slidably connected with a T-shaped top rod (9), and each T-shaped top rod (9) is fixed with a roller frame (14) at one end close to each other. The roller frame (14) is provided with grooved rollers, and a compression spring (16) is fixed between the roller frame (14) and the inner wall of the movable end sleeve (1) or the fixed end sleeve (10).

10. The adaptive deformation processing equipment for segmented welding sequence of thick-walled carbon steel pipes according to claim 9, characterized in that, The inner sides of the movable end sleeve (1) and the fixed end sleeve (10) near each stepped mounting hole (17) are provided with spring grooves (18) for fixing the compression spring (16).

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