Welding butt joint device for gas pipeline construction

Abstract

The invention relates to the field of pipeline welding, and provides a gas pipeline construction welding butt joint device which comprises a multi-degree-of-freedom supporting module, a base shell, a rotating module, a clamping shell, an adjusting module, a multi-degree-of-freedom welding module and an integrated driving module, an opening is formed in one side of the base shell, and the rotating module comprises a driving part, an arc-shaped pipe shell and a positioning hole. The integrated driving module is used for controlling the clamping shell to do radial movement, the surface of the pin rod is sleeved with a second spring, the second spring is used for controlling the pin rod to be separated from the cleaning part, the adjusting module can move along the axis of the arc-shaped pipe shell and comprises a limiting pin and a second pressure applying piece, and the limiting pin is located in the positioning hole and can enter the limiting hole. The second pressure applying piece controls the pin rod to make sliding contact with the cleaning part, then the cleaning part is controlled to stretch out of the hidden opening, the integrated operation function of clamping alignment, rotary translation cleaning and rotary welding is achieved, and the beneficial effects of being ingenious in structural matching, small in size, high in integration degree and high in precision are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline welding, in particular to a welding butt joint device for gas pipeline construction. BACKGROUND

[0002] Gas is the general term for gaseous fuels, which can burn to release heat for residents and industrial enterprises to use. The commonly used gas in life is mainly natural gas, which is mainly composed of methane and is a colorless, odorless, non-toxic and non-corrosive combustible gas. The gas pipeline is a special pipeline for transporting gas for residents. At present, the gas pipeline in the building of urban residents is generally made of steel structure material, and the pipeline is connected by precise butt joint and welding.

[0003] According to the search, the pipeline rapid and precise butt joint structure for gas pipeline construction disclosed in publication No. CN116871803A includes a first pipe body and a second pipe body, the outer sides of the first pipe body and the second pipe body are provided with a butt joint processing mechanism, and the outer sides of the first pipe body and the second pipe body are provided with a positioning butt joint mechanism. The butt joint processing mechanism includes a fixed block fixedly connected to the outer side of the first pipe body, a driving screw rotatably connected to the top of the fixed block, and two driven screws rotatably connected to the bottom of the fixed block. The pipeline rapid and precise butt joint structure for gas pipeline construction can make the first pipe body and the second pipe body on the same axis by using the lower fixed ring and the upper fixed ring, and can quickly realize the precise butt joint of the two pipelines by cooperating with the guiding effect of the guide groove, the embedded groove and the embedded block, and can keep the first pipe body and the second pipe body closely fitted by cooperating with the rotating effect of the driving screw and the driven screw, thereby improving the installation stability.

[0004] Since the gas pipeline is generally installed and fixed on the surface of the building, it is limited by the operation space. In the traditional gas pipeline construction process, the welding butt joint is carried out by separating the pipeline pre-installation, butt joint and welding by using different tools. This operation mode has the following defects: (1) The split tool not only easily leads to loss of precision, especially in the welding butt joint process, but also has the problems of complicated operation and limited space; (2) The split tool has a single function and does not have an auxiliary cleaning function. For example, burrs exist at the pipeline interface to be welded, especially welding slag left after the pipeline is disassembled. If the cleaning is not performed before welding, the problems of incomplete fusion and pores are likely to occur during or after welding. SUMMARY

[0005] The purpose of the present application is to provide a welding butt joint device for gas pipeline construction, which realizes the deep integration and structural reuse of the three functions of "clamping-cleaning-welding" through mechanical linkage and space reconstruction, and fundamentally solves the problems of precision loss, complicated operation and limited space caused by traditional split tools.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding and butt welding device for gas pipeline construction, comprising a multi-degree-of-freedom support module, a multi-degree-of-freedom welding module, and an integrated drive module, and further comprising:

[0007] A base shell connected to a multi-degree-of-freedom support module, wherein an opening is provided on one side of the base shell;

[0008] The rotating module includes a driving component, an arc-shaped tube shell, and a positioning hole. The arc-shaped tube shell is rotatably disposed within the opening. Two sets of driving components are used to control the rotation of the arc-shaped tube shell. A positioning hole is provided on one side of the arc-shaped tube shell. The multi-degree-of-freedom welding module is fixedly disposed at the end of the arc-shaped tube shell near the driving component.

[0009] The clamping housing is disposed within the arc-shaped tube shell. The integrated drive module is used to control the radial movement of the clamping housing. The clamping housing is slidably disposed within the arc-shaped tube shell. A limit hole is provided on the side of the clamping housing near the positioning hole. A hidden opening is provided on the side of the clamping housing away from the integrated drive module. A cleaning part is provided in the hidden opening. A pin is provided on the side of the hidden opening near the limit hole. A second spring is sleeved on the surface of the pin. The second spring is used to control the pin to disengage from the cleaning part.

[0010] An adjustment module is located at the end of the arc-shaped tube shell opposite to the multi-degree-of-freedom welding module. The adjustment module can move along the axis of the arc-shaped tube shell. The adjustment module includes a limiting pin and a second pressure-applying component. The limiting pin is located in the positioning hole and can enter the limiting hole. The second pressure-applying component controls the pin rod to slide in contact with the cleaning part, thereby controlling the cleaning part to extend out of the hidden opening.

[0011] The beneficial effects of this invention are as follows: This application integrates the three major functions of clamping, cleaning and welding into the base shell through deep integration and structural reuse design. This not only fundamentally solves the problems of precision loss, cumbersome operation and limited space caused by traditional split tools, but the triangular base can also use the building surface to establish a stable coordinate system to achieve precise positioning of pipe installation, docking and welding. It realizes the integrated operation function of clamping alignment, rotation and translation cleaning and immediate welding. It has the characteristics of ingenious structural fit, small size, high integration and high precision. Attached Figure Description

[0012] Figure 1 This is a planar schematic diagram of the present invention.

[0013] Figure 2 This is a perspective view of the present invention.

[0014] Figure 3 This is an exploded view of the present invention.

[0015] Figure 4It is a perspective view of the base shell of the embodiment of the present application.

[0016] Figure 5 It is a perspective view of the clamping shell of the embodiment of the present application.

[0017] Figure 6 It is a perspective view of the integrated drive module of the embodiment of the present application.

[0018] Figure 7 It is a split schematic view of the rotating module and the adjusting module of the embodiment of the present application.

[0019] Figure 8 It is an assembly view of the clamping shell, the integrated drive module, the rotating module and the adjusting module of the embodiment of the present application.

[0020] Figure 9 It is a first plane cross-sectional view of the present application.

[0021] Figure 10 It is a partial enlarged view at a in the present application. Figure 9

[0022] Figure 11 It is a second plane cross-sectional view of the present application.

[0023] Figure 12 It is a front view of the present application.

[0024] Figure 13 It is a rear view of the present application.

[0025] Reference signs: 1 - base shell, 11 - mounting port, 12 - first radial guide rail;

[0026] 2 - clamping shell, 21 - opening, 22 - first spring, 23 - limiting hole, 24 - hidden port, 25 - pin rod, 26 - second spring, 27 - cleaning part, 271 - scraper, 272 - movable rod, 273 - wedge-shaped block, 274 - third spring;

[0027] 3 - integrated drive module, 31 - drive worm, 32 - transmission assembly, 321 - roller shaft, 322 - pulley, 323 - transmission gear, 324 - worm gear, 33 - radial pressing member, 331 - toothed plate, 322 - pressing block;

[0028] 4 - rotating module, 41 - driving member, 42 - arc-shaped tube shell, 43 - sector gear, 44 - second radial guide rail, 441 - transverse plate, 45 - limiting sleeve, 46 - positioning hole;

[0029] 5 - multi-degree-of-freedom welding module;

[0030] ​6-adjusting module, 61-electromagnet, 62-moving plate, 63-limiting pin, 64-second pressure applying piece, 65-third spring; 7-multi-degree-of-freedom supporting module, 8-tube body, 9-building surface. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0032] The specific implementation of the present application is described in detail below in combination with specific embodiments.

[0033] Please refer to Figures 1 to 13 In an embodiment of the present application, a welding butt joint device for gas pipeline construction comprises a multi-degree-of-freedom supporting module 7, a multi-degree-of-freedom welding module 5 and an integrated driving module 3, and further comprises:

[0034] A base shell 1 connected with the multi-degree-of-freedom supporting module 7, wherein one side of the base shell 1 is provided with a mounting port 11;

[0035] A rotating module 4, wherein the rotating module 4 comprises driving pieces 41, an arc-shaped tube shell 42 and a positioning hole 46, the arc-shaped tube shell 42 is rotationally arranged in the opening 21, two groups of the driving pieces 41 are used to control the rotation of the arc-shaped tube shell 42, one side of the arc-shaped tube shell 42 is provided with the positioning hole 46, and the multi-degree-of-freedom welding module 5 is fixedly arranged at one end of the arc-shaped tube shell 42 close to the driving pieces 41;

[0036] A clamping shell 2 arranged in the arc-shaped tube shell 42, wherein the integrated driving module 3 is used to control the radial movement of the clamping shell 2, the clamping shell 2 is slidingly arranged in the arc-shaped tube shell 42, one side of the clamping shell 2 close to the positioning hole 46 is provided with a limiting hole 23, one side of the clamping shell 2 away from the integrated driving module 3 is provided with a hidden port 24, the hidden port 24 is provided with a cleaning part 27, one side of the hidden port 24 close to the limiting hole 23 is provided with a pin rod 25, the second spring 26 is arranged on the surface of the pin rod 25, and the second spring 26 is used to control the pin rod 25 to be separated from the cleaning part 27;

[0037] The adjusting module 6 is arranged at the end of the arc-shaped pipe shell 42 away from the multi-degree-of-freedom welding module 5, the adjusting module 6 can move along the axis of the arc-shaped pipe shell 42, the adjusting module 6 comprises a limiting pin 63 and a second pressing member 64, the limiting pin 63 is located in the positioning hole 46 and can enter the limiting hole 23, the second pressing member 64 controls the sliding contact between the pin rod 25 and the cleaning part 27, and then controls the cleaning part 27 to extend out of the hidden opening 24, the second pressing member 64 is a long circular rod or block, and the length of the second pressing member 64 is greater than the maximum diameter of the pin rod 25, so that the second pressing member 64 can always press or contact the pin rod 25 even if the pin rod 25 moves a certain distance radially along with the clamping shell 2.

[0038] Please refer to Figure 5 and Figure 10 Further, the cleaning part 27 comprises a scraper 271, a movable rod 272, a wedge-shaped block 273 and a third spring 274, the movable rod 272 is fixedly arranged between the wedge-shaped block 273 and the scraper 271, one end of the pin rod 25 can slide on the surface of the wedge-shaped block 273, and the third spring 274 is connected between the wedge-shaped block 273 and the hidden opening 24, and the third spring 274 is used to drive the scraper 271 to retract into the hidden opening 24.

[0039] Please refer to Figure 7 and Figure 8 Further, the rotating module 4 further comprises a sector gear 43, a second radial guide rail 44, a cross plate 441 and a limiting sleeve 45, the arc-shaped pipe shell 42 is respectively fixedly provided with the sector gear 43 and the limiting sleeve 45 at two ends, the two groups of driving members 41 are in transmission connection with the sector gear 43, the arc-shaped pipe shell 42 is provided with the second radial guide rail 44 on the surface, the clamping shell 2 is slidingly arranged in the second radial guide rail 44, and the second radial guide rail 44 is fixedly provided with the cross plate 441.

[0040] Please refer to Figure 5 and Figure 10 Further, the clamping shell 2 is provided with an opening 21 on the surface, the cross plate 441 penetrates through the opening 21, and the first spring 22 is connected between the clamping shell 2 and the cross plate 441.

[0041] In the embodiment of the application, the multi-degree-of-freedom supporting module 7 comprises a mechanical arm and a movable carrier, the mechanical arm is arranged on the surface of the movable carrier, the base shell is connected with the mechanical arm, and the clamping shell 2 serves as an integrated multiplex carrier, and the following multi-state conversion can be realized:

[0042] The clamping state: the worm drive pressing block 322 presses the three groups of 120° distributed clamping shells 2, so that the pipe is radially locked;

[0043] Cleaning state: the electromagnetic iron 61 and the limit pin 63 linkage mechanism are triggered when the clamping shell 2 retreats radially (the displacement of the clamping shell 2 is monitored in real time by the displacement sensor arranged on the inner side of the clamping shell 2) to lock the shell position, while the wedge-shaped block 273 and the pin rod 25 push the scraper 271 to extend out of the hidden port 24, and the two groups of drive members 41 drive the clamping shell 2 to rotate through the sector gear 43, so that the scraper 271 completes surface treatment.

[0044] Welding state: the arc-shaped pipe shell 42 serves as a ring-shaped guide rail base or a ring-shaped movement carrier, so that the welding gun can move circumferentially to form a closed loop weld, and the same group of clamping shells 2 bear the positioning reference, cleaning scraper 271 carrier and welding track carrier functions, which can eliminate repeated clamping errors and improve the integration of the device as a whole through structural reuse.

[0045] In another embodiment of the present application, please refer to Figure 6 and Figure 7 , the base shell 1 is a triangular shell, and the first radial guide rail 12 is arranged on the inner side of the triangular shell. In the pre-installation stage, the triangular bottom edge is attached to the building surface 9, so as to form a stable support plane. After the pipe is fixed, the multi-degree-of-freedom support module 7 is adjusted by X / Y / Z and angle to fine-tune the pipe position, and the fixed pipe can be removed without disturbance.

[0046] Please refer to Figure 6 , further, the integrated drive module 3 includes a drive worm 31, a transmission assembly 32 and a radial pressure applying member 33. Three groups of the transmission assembly 32 are symmetrically distributed about the geometric center of the triangular shell. The transmission assembly 32 includes a roller shaft 321, a belt pulley 322, a transmission gear 323 and a worm gear 324. The belt pulley 322, the transmission gear 323 and the worm gear 324 are all fixedly arranged on the surface of the roller shaft 321. Two groups of the transmission assembly 32 are in transmission connection with the drive worm 31 through the worm gear 324. A synchronous belt is connected between the two groups of belt pulleys 322. The radial pressure applying member 33 is in transmission connection with the transmission gear 323.

[0047] Please refer to Figure 8 , further, the radial pressure applying member 33 includes a toothed plate 331 and a pressure applying block 322. The pressure applying block 322 is fixedly arranged on the end of the toothed plate 331. The transmission gear 323 is in transmission connection with the toothed plate 331. The toothed plate 331 is slidingly arranged in the first radial guide rail 12. The pressure applying block 322 can be in contact with the clamping shell 2.

[0048] In the embodiment of the present application, the driving worm 31 is rotated forward to drive the pressing block 322 to radially extrude, and the driving worm 31 is rotated reversely to make the clamping shell 2 radially retreat, and the integrated driving module 3 can also be replaced by a modular driving module, which comprises a hydraulic telescopic rod and a pressing block, the fixed end of the hydraulic telescopic rod is fixedly connected with the triangular shell, and the pressing block is fixedly connected with the movable end of the hydraulic telescopic rod.

[0049] Please refer to Figure 7 and Figure 10 In another embodiment of the present application, the adjusting module 6 comprises an electromagnet 61, a movable plate 62 and a third spring 274, the electromagnet 61 is fixedly arranged at the end of the arc-shaped tube shell 42, the limiting pin 63 and the second pressing member 64 are both fixedly arranged on the surface of the movable plate 62, the surface of the movable plate 62 is embedded with a magnetic core, the third spring 274 is connected between the arc-shaped tube shell 42 and the movable plate 62, and the movable plate 62 can contact with the limiting sleeve 45.

[0050] In the embodiment of the present application, the cooperation of the electromagnet 61, the spring and the limiting pin 63 can prevent the clamping shell 2 from being accidentally closed during cleaning and welding, when the clamping shell 2 retreats, the electromagnet 61 adsorbs the movable plate 62, the limiting pin 63 is inserted into the limiting hole 23 to form mechanical locking, the second pressing member 64 extrudes the pin rod 25 to drive the wedge-shaped block 273 to eject the scraper 271, and by the coupling of the energized state of the electromagnet 61 and the mechanical limiting, the forced action chain of “retreating to lock and locking to clean” is realized.

[0051] In the non-working state, the scraper 271 is retracted into the shell to avoid interference with the pipeline installation, and no additional cylinder or motor is needed, but only the residual mechanical energy of the clamping system is used to drive the cleaning.

[0052] Working principle: the clamping and fixing link of the pipe body 8: the pipe body 8 is placed into the arc-shaped tube shell 42 from the opening 21, the driving worm 31 and the transmission assembly 32 are used to control the pressing block 322 to extrude the clamping shell 2, so that the clamping shell 2 moves radially, and the three groups of clamping shells 2 clamp and fix the pipe body 8.

[0053] Pre-installation link of the pipe body 8: refer to the attached Figure 1 The multi-degree-of-freedom supporting module 7 has the functions of linear adjustment and angle adjustment in X, Y and Z directions, which is used to adjust the angle of the base shell 1 or the orientation of the installation opening 11 according to the installation direction of the pipe body 8 on the building surface 9, the base shell 1 with a triangular shell can lap or support one side of the installation opening 11 on the building surface 9 before the pipe is fixed, which can ensure the accuracy and stability when the pipe is fixed on the building surface 9, and the base shell 1 is convenient to move away after the pipe body 8 is fixed on the building surface 9.

[0054] The butt joint process of the pipe body 8: another pipe body 8 is butt jointed with the fixed pipe body 8 by using the multi-degree-of-freedom support module 7, and the coaxiality of the two pipe bodies 8 is controlled by using the laser positioning sensor, so as to ensure the precision of the butt joint of the two pipe bodies 8; and the pipe body 8 is fixed on the building surface 9 by using the above method;

[0055] The pre-welding process: the clamping shell 2 is controlled to be radially away from the pipe body 8 by a certain distance by using the integrated driving module 3, the movable plate 62 (magnetic core) is adsorbed by using the electromagnet 61, at this time, the limiting pin 63 penetrates through the positioning hole 46 and enters the limiting hole 23, so as to prevent the elastic deformation of the first spring 22 from driving it to reset after the pressing block 322 is separated from the clamping shell 2, so as to limit the clamping shell 2, the second pressing member 64 is connected with the wedge-shaped block 273 at the end of the pin rod 25 through the extrusion of the pin rod 25, so as to drive the scraper 271 to extend out of the hidden hole 24 and contact the surface of the pipe body 8, the arc-shaped pipe shell 42 and the scraper 271 are controlled to rotate by using the driving member 41 and the sector gear 43, and the multi-degree-of-freedom support module 7 is axially moved along the pipe body 8, so that the scraper 271 can clean the burrs or foreign matters on the surface of the pipe body within a certain length range, and prevent defects such as incomplete fusion and pores from occurring in the welding process;

[0056] The welding process: the angle and length of the welding gun or the welding head are adjusted by using the multi-degree-of-freedom welding module 5, the arc-shaped pipe shell 42 and the multi-degree-of-freedom welding module 5 are controlled to rotate by using the driving member 41 and the sector gear 43, so as to form an annular weld at the pipe joint;

[0057] The post-welding process: the slag burrs generated at the welding position are cleaned by using the method in the pre-welding process.

[0058] As described above, the three functions of clamping, cleaning and welding are integrated in the base shell 1 by deep integration and structural reuse, which not only fundamentally solves the problems of precision loss, complicated operation and space limitation caused by the traditional split tool, but also establishes a stable coordinate system by using the building surface 9, realizes the precise positioning of the installation, butt joint and welding of the pipe, realizes the integrated operation functions of clamping alignment, rotating and translating cleaning and rotating welding, and has the characteristics of clever structure cooperation, small size, high integration and high precision.

[0059] For those skilled in the art, although several embodiments and examples of the application are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the application. These new embodiments can be implemented in other various ways, and various omissions, substitutions, changes can be made without departing from the spirit of the application.

[0060] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A welding and butt welding device for gas pipeline construction, comprising a multi-degree-of-freedom support module (7), a multi-degree-of-freedom welding module (5), and an integrated drive module (3), characterized in that, Also includes: A base shell (1) connected to a multi-degree-of-freedom support module (7) has an installation port (11) on one side; Rotation module (4), the rotation module (4) includes a drive (41), an arc-shaped tube shell (42) and a positioning hole (46). The arc-shaped tube shell (42) is rotatably disposed in the opening (21). Two sets of drive (41) are used to control the rotation of the arc-shaped tube shell (42). A positioning hole (46) is provided on one side of the arc-shaped tube shell (42). The multi-degree-of-freedom welding module (5) is fixedly disposed at one end of the arc-shaped tube shell (42) near the drive (41). The clamping housing (2) is set inside the arc-shaped tube shell (42). The integrated drive module (3) is used to control the clamping housing (2) to make radial movements. The clamping housing (2) is slidably set inside the arc-shaped tube shell (42). A limiting hole (23) is provided on the side of the clamping housing (2) near the positioning hole (46). A hidden opening (24) is provided on the side of the clamping housing (2) away from the integrated drive module (3). A cleaning part (27) is provided inside the hidden opening (24). A pin (25) is provided on the side of the hidden opening (24) near the limiting hole (23). A second spring (26) is sleeved on the surface of the pin (25). The second spring (26) is used to control the pin (25) to disengage from the cleaning part (27). An adjustment module (6) is installed at one end of the arc-shaped tube shell (42) away from the multi-degree-of-freedom welding module (5). The adjustment module (6) can move along the axis of the arc-shaped tube shell (42). The adjustment module (6) includes a limiting pin (63) and a second pressure member (64). The limiting pin (63) is located in the positioning hole (46) and can enter the limiting hole (23). The second pressure member (64) controls the pin rod (25) to slide in contact with the cleaning part (27), thereby controlling the cleaning part (27) to extend out of the hidden opening (24).

2. The welding and butt welding device for gas pipeline construction according to claim 1, characterized in that, The cleaning unit (27) includes a scraper (271), a movable rod (272), a wedge block (273), and a third spring (274). The movable rod (272) is fixedly disposed between the wedge block (273) and the scraper (271). One end of the pin (25) can slide in contact with the surface of the wedge block (273). The third spring (274) is connected between the wedge block (273) and the hidden opening (24). The third spring (274) is used to drive the scraper (271) to retract into the hidden opening (24).

3. The welding and butt welding device for gas pipeline construction according to claim 2, characterized in that, The base shell (1) has a triangular shell shape, and a first radial guide rail (12) is provided on the inner side of the triangular shell.

4. The welding and butt welding device for gas pipeline construction according to claim 3, characterized in that, The integrated drive module (3) includes a drive worm (31), a transmission assembly (32), and a radial pressure component (33). The three sets of transmission assemblies (32) are symmetrically distributed about the geometric center of the triangular shell. The transmission assembly (32) includes a roller (321), a pulley (322), a transmission gear (323), and a worm wheel (324). The pulley (322), transmission gear (323), and worm wheel (324) are all fixedly mounted on the surface of the roller (321). Both sets of transmission assemblies (32) are connected to the drive worm (31) through the worm wheel (324). A synchronous belt is connected between the two sets of pulleys (322). The radial pressure component (33) is connected to the transmission gear (323).

5. The welding and butt welding device for gas pipeline construction according to claim 4, characterized in that, The radial pressure member (33) includes a toothed plate (331) and a pressure block (322). The pressure block (322) is fixedly disposed at the end of the toothed plate (331). The transmission gear (323) is connected to the toothed plate (331) in a transmission manner. The toothed plate (331) is slidably disposed in the first radial guide rail (12). The pressure block (322) can contact the clamping housing (2).

6. The welding and butt welding device for gas pipeline construction according to claim 5, characterized in that, The rotating module (4) also includes a sector gear (43), a second radial guide rail (44), a horizontal plate (441), and a limiting sleeve (45). The two ends of the arc-shaped tube shell (42) are respectively fixedly provided with a sector gear (43) and a limiting sleeve (45). Both sets of driving components (41) are connected to the sector gear (43) for transmission. The surface of the arc-shaped tube shell (42) is provided with a second radial guide rail (44). The clamping shell (2) is slidably disposed in the second radial guide rail (44). The horizontal plate (441) is fixedly disposed in the second radial guide rail (44).

7. A welding and butt welding device for gas pipeline construction according to claim 6, characterized in that, The clamping housing (2) has an opening (21) on its surface, and the horizontal plate (441) passes through the opening (21). A first spring (22) is connected between the clamping housing (2) and the horizontal plate (441).

8. A welding and butt welding device for gas pipeline construction according to claim 6, characterized in that, The adjustment module (6) includes an electromagnet (61), a movable plate (62), and a third spring (274). The electromagnet (61) is fixedly disposed at the end of the arc-shaped tube shell (42). The limiting pin (63) and the second pressure-applying component (64) are both fixedly disposed on the surface of the movable plate (62). A magnetic core is embedded in the surface of the movable plate (62). The third spring (274) is connected between the arc-shaped tube shell (42) and the movable plate (62). The movable plate (62) can contact the limiting sleeve (45).

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