Pipe welding apparatus and method of use

Abstract

The application discloses a pipe welding equipment and a use method thereof, and relates to the technical field of pipe welding. The pipe welding equipment comprises a bottom plate and a control module arranged on the upper side of the bottom plate. Two groups of fixing mechanisms are arranged on the upper side of the bottom plate, and a welding mechanism is arranged between the two groups of fixing mechanisms, so that the fixing and central positioning of two pipe sections are realized, and a stable foundation is provided for subsequent welding. The fixing mechanism comprises a transmission assembly, a lower fixing frame and an upper fixing frame on the transmission assembly, and the lower fixing frame and the upper fixing frame are both semicircular arc plates. The clamping assembly driven by the first motor and rotating through the arc-shaped tooth plate is arranged, so that the pipe is rotated as a whole while the welding gun is fixed. The molten pool is always located in the central area of the lower side of the pipe, the disturbance of gravity to the molten metal is reduced, the stability of the molten pool in the welding process and the forming quality are improved, and the pipe welding equipment has the characteristics of high practicability, welding penetration improvement and welding seam forming quality improvement.

Description

Technical Field

[0001] This invention relates to the field of pipe welding technology, specifically to a pipe welding device and its usage method. Background Technology

[0002] Currently, in the field of pipe welding, especially in industries such as oil, natural gas, chemical and shipbuilding, butt welding between round pipes is a common and critical connection process. Most existing pipe welding equipment adopts a welding method of fixing the pipe and rotating the welding head around the pipe. This type of equipment has a relatively compact structure, which facilitates multi-angle welding and is suitable for space-constrained working environments.

[0003] The existing pipe welding device with publication number CN114273812A has a welding torch drive assembly that can move along the outer circle of the pipe, thereby enabling uniform welding at the pipe joint. During the process of the welding torch support moving around the outer circle of the pipe, the push rod reciprocates and contacts the protrusion on the semi-circular top plate, and the welding torch support swings back and forth, thus achieving fish scale welding at the pipe joint. The fish scale weld pattern has high connection strength, thereby completing the welding of the pipe. In this welding method, the welding point is easily located above or to the side of the pipe during the welding process, and is greatly affected by gravity, which can easily lead to problems such as molten pool displacement, insufficient penetration, and unstable formation, thereby affecting the welding quality and weld consistency.

[0004] To improve welding quality, some existing equipment adjusts the welding process by setting up multi-axis linkage welding heads, introducing vision or temperature monitoring systems, and controlling the welding torch posture. However, these solutions generally have the following shortcomings: complex structure, high cost, which hinders widespread adoption; because the pipe fittings remain stationary during welding, the welding torch travels a long path, requiring high precision in path planning and trajectory control; and the molten pool position is constantly changing during welding, making it difficult to keep the molten metal in a stable zone with minimal gravitational influence, which easily leads to welding defects.

[0005] Therefore, there is an urgent need for a pipe welding device that can enable the pipe fitting to rotate on its own, the welding head to be fixed or move within a small range, and ensure that the molten pool is always located in the lower center area, so as to reduce gravity interference, improve the welding penetration and weld formation quality, and improve clamping stability and welding consistency through structural optimization, so as to achieve high-quality automated welding. Summary of the Invention

[0006] The purpose of this invention is to provide a pipe welding device and its method of use to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pipe welding equipment, including a base plate and a control module disposed on the upper side of the base plate, wherein two sets of fixing mechanisms are disposed on the upper side of the base plate, and a welding mechanism is disposed between the two sets of fixing mechanisms, so as to realize the fixing and centering of two pipe sections, providing a stable foundation for subsequent welding;

[0008] The fixing mechanism includes a transmission assembly and a lower fixing frame and an upper fixing frame on the transmission assembly. Both the lower fixing frame and the upper fixing frame are semi-circular arc plates, and the front end of the lower fixing frame is hinged to the front end of the upper fixing frame. The lower fixing frame and the upper fixing frame can form a ring structure, which can achieve a wrapping clamping of pipe fittings of different sizes. The structure is stable and highly adaptable.

[0009] The welding mechanism includes a connecting component and a welding module on the connecting component. The welding module can move in the forward, backward, up, and down directions with the support of the connecting component, so as to realize the multi-position adjustment of the welding head in space and enhance the welding alignment accuracy.

[0010] According to the above technical solution, the transmission component includes a bracket, the lower side of which is fixedly connected to the upper side of the base plate. A first motor is fixedly connected to the middle of the bracket, and a bevel gear is fixedly connected to the output end of the first motor. A roller is rotatably connected to the side wall of the bracket via a bearing. A lower fixed frame is placed on the upper side of the roller. A first electric telescopic rod is fixedly connected to both the lower and upper fixed frames. A clamping block is fixedly connected to one end of the first electric telescopic rod facing the inside of the lower and upper fixed frames. An arc-shaped toothed plate is fixedly connected to the inner wall of both the lower and upper fixed frames. The outer wall of the arc-shaped toothed plate is driven by the bevel gear to the output end of the first motor. By driving the arc-shaped toothed plate with the first motor, the clamping device rotates synchronously with the pipe, providing power support for rotary welding.

[0011] According to the above technical solution, four rollers are provided on the lower side of the lower fixed frame, and the four rollers are respectively set on two brackets. Six first electric telescopic rods are provided on both the lower fixed frame and the upper fixed frame. The two arc-shaped toothed plates can form a ring gear, which improves the clamping stability and the uniformity of clamping force distribution, and enhances the adaptability to large-size pipe fittings and the rotation synchronization accuracy.

[0012] According to the above technical solution, the first electric telescopic rod is electrically connected to the control module, and the extension and retraction of the first electric telescopic rods are uniformly controlled by the control module to synchronously fit the outer wall of the pipe and support the pipe.

[0013] The first motor is electrically connected to the control module, and the first motor is used to drive the lower fixed frame and the upper fixed frame to rotate through the bevel gear and the arc-shaped toothed plate to achieve multi-point synchronous control, ensure uniform and stable clamping action, and improve the overall coordination and automation level of operation in conjunction with rotation control.

[0014] According to the above technical solution, the connecting component includes a fixed frame, the lower side of which is fixedly connected to the upper side of the base plate. A sliding rod is inserted into the middle of the fixed frame, and a first hydraulic telescopic rod is rotatably connected to the outer wall of the sliding rod through a bearing. A welding module is provided at the upper end of the first hydraulic telescopic rod, and a moving mechanism is provided on the right side of the fixed frame to realize the stable support and displacement capability of the welding head, providing multi-degree-of-freedom support for the adjustment of welding angle and position.

[0015] According to the above technical solution, a second motor is fixedly connected to the rear side of the middle of the upper surface of the base plate, and a temperature recognition module is fixedly connected to the output end of the second motor. A second hydraulic telescopic rod is hinged to the rear side of the middle of the first hydraulic telescopic rod. Another set of fixing frames and sliding rods is provided in the middle of the base plate. The lower end of the second hydraulic telescopic rod is hinged to the outer wall of the sliding rod in the middle of the base plate, so that the welding point temperature recognition module has the ability to follow up, can flexibly adjust the orientation and track the welding point, and improve the accuracy of real-time monitoring of welding temperature.

[0016] According to the above technical solution, the moving mechanism includes a third motor, the output end of which is fixedly connected to a transmission rod, the outer wall of which is fixedly connected to a rhombus block, and the right ends of the two slide rods are fixedly connected to a second electric telescopic rod. The outer walls of the two slide rods are fixedly connected to a spring, the other end of which is fixedly connected to the outer wall of the fixed frame. By pushing the telescopic rod through the rhombus block, the welding module can be reciprocated in the left and right directions, thereby improving the uniformity of weld formation.

[0017] According to the above technical solution, the first hydraulic telescopic rod, the second motor, the temperature recognition module, the second hydraulic telescopic rod, the second electric telescopic rod, and the third motor are all electrically connected to the control module.

[0018] Furthermore, the temperature recognition module is used to detect the temperature of the welding point, and the second motor is used to control the deflection angle of the temperature recognition module to ensure that the temperature recognition module is always facing the welding point.

[0019] The rhombus-shaped block has a rhombus structure. The third motor drives the rhombus-shaped block to rotate, which can push the second electric telescopic rod and the slide rod to move back and forth in the left and right directions. The second electric telescopic rod can adjust its own length to adjust the left and right movement range. Through full-process control, the welding point temperature is tracked in real time and the welding posture is linked to control, thereby improving the intelligence level of the welding process and the consistency of the weld.

[0020] A method of using a pipe fitting welding equipment includes the following steps:

[0021] S1: Place the two sections of round pipe to be welded between the two sets of fixing mechanisms above the equipment base plate, align their axes and let them fall into the support area of ​​the lower fixing frame;

[0022] S2: The control module controls multiple first electric telescopic rods to extend, drive the clamping block to fit against the outer wall of the pipe fitting, and the lower fixed frame and upper fixed frame close to form a ring clamping structure, so as to realize automatic adaptation and clamping and fixing of pipe fittings of different sizes.

[0023] S3: The first motor starts, and its output drives the arc-shaped toothed plate through the bevel gear, thereby driving the lower fixed frame, the upper fixed frame and the clamped pipe to rotate around the axis, providing continuous rotational action for welding;

[0024] S4: The first hydraulic telescopic rod in the welding mechanism works with the slide rod to adjust the position of the welding module, and the second hydraulic telescopic rod adjusts the front and rear posture so that the welding head is always aligned with the center of the bottom of the weld.

[0025] S5: The second motor controls the temperature recognition module to deflect the angle, so that it continuously faces the welding point to monitor the temperature. The temperature data is fed back to the control module in real time to assist in adjusting the welding parameters and posture.

[0026] S6: Start the third motor, which drives the second electric telescopic rod to reciprocate through the diamond block, so as to realize the synchronous swing of the welding head in the left and right directions, complete the welding of multiple seams or improve the forming quality until the welding is completed.

[0027] Compared with the prior art, the beneficial effects achieved by the present invention are: by setting a fixing mechanism for adaptively clamping pipe fittings of different sizes, and by having multiple first electric telescopic rods drive the clamping blocks to fit against the outer wall of the pipe fitting, the present invention can achieve precise clamping and centering of pipe fittings of different outer diameters, ensuring rotational stability and weld alignment accuracy.

[0028] By setting up a clamping assembly driven by a first motor and rotating with an arc-shaped toothed plate, the entire pipe is rotated while the welding gun is fixed, which effectively ensures that the molten pool is always located in the central area of ​​the lower side of the pipe, reduces the disturbance of gravity on the molten metal, and improves the stability of the molten pool and the forming quality during the welding process.

[0029] By incorporating a movable welding mechanism and an adjustable temperature recognition module, the position and orientation of the welding head can be adjusted in real time to follow the position of the weld point. This enables precise alignment and dynamic tracking of the molten pool temperature during the welding process, thereby improving welding consistency and heat input control accuracy.

[0030] By incorporating a welding module that drives the welding head to swing laterally, and combining it with a diamond-shaped block, a second electric telescopic rod, and a sliding rod, the welding head can swing synchronously in the left and right directions, widening the range of the molten pool trajectory, improving the weld formation effect, and avoiding undercut defects. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the fixing mechanism structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the fixed frame travel structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the disassembled structure of the fixing mechanism of the present invention;

[0036] Figure 5 This is a schematic diagram of the welding mechanism structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the moving mechanism structure of the present invention;

[0038] In the diagram: 1. Base plate, 2. Control module, 3. Fixing mechanism, 4. Welding mechanism, 301. Bracket, 302. First motor, 303. Roller, 304. Lower fixing frame, 305. Upper fixing frame, 306. First electric telescopic rod, 307. Clamping block, 308. Arc-shaped toothed plate, 401. Fixing frame, 402. Slide rod, 403. First hydraulic telescopic rod, 404. Welding module, 405. Second motor, 406. Temperature recognition module, 407. Moving mechanism, 408. Second hydraulic telescopic rod, 701. Third motor, 702. Transmission rod, 703. Rhomboid block, 704. Spring, 705. Second electric telescopic rod. Detailed Implementation

[0039] The technical solutions of the embodiments 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] Please see Figure 1-4The present invention provides a technical solution: a pipe welding equipment, including a base plate 1, a control module 2, two sets of fixing mechanisms 3 and a welding mechanism 4 disposed between the two sets of fixing mechanisms 3. The fixing mechanism 3 includes a bracket 301, a first motor 302, a roller 303, a lower fixing frame 304, an upper fixing frame 305, a plurality of first electric telescopic rods 306, clamping blocks 307 and an arc-shaped toothed plate 308. The lower fixing frame 304 and the upper fixing frame 305 are hinged to form an openable structure for adapting to pipes of different diameters. The first electric telescopic rods 306 extend and retract to drive the clamping blocks 307 to fit against the outer wall of the pipe to achieve stable fixation. The first motor 302 cooperates with the arc-shaped toothed plate 308 through a bevel gear to drive the lower fixing frame 304 and the upper fixing frame 305 to rotate around the axis of the pipe to achieve rotational welding preparation. Through this structure, high-precision positioning and uniform rotation of the pipe are achieved, providing a foundation for a stable molten pool below.

[0042] In practical applications of this device, the operator places two sections of round pipe to be welded horizontally between the two sets of welding mechanisms 4 of the equipment, which fall on the lower fixed frame 304 respectively. The operator issues a command through the control module 2, and multiple first electric telescopic rods 306 extend synchronously, driving the clamping block 307 to fit against the outer wall of the pipe, thereby achieving the wrapping and clamping of the pipe. The upper fixed frame 305 closes with the lower fixed frame 304 under the action of the hinge structure, forming a complete circumferential structure that can accommodate pipes of different sizes.

[0043] Next, the first motor 302 starts and drives the system. Its output shaft is driven by a bevel gear meshing with the arc-shaped toothed plate 308, which drives the upper and lower fixed frames to rotate around the axis of the pipe. This rotation forms the basis for continuous welding motion, and the system enters the welding state, creating a stable rotation platform for subsequent welding mechanism actions.

[0044] Example 2:

[0045] Please see Figure 1-6Based on Embodiment 1, the present invention provides a technical solution: the welding mechanism 4 includes a connecting component and a welding module 404 on the connecting component. The welding module 404 can move in the front-back and up-down directions with the support of the connecting component. The connecting component includes a fixing frame 401, the lower side of which is fixedly connected to the upper side of the base plate 1. A sliding rod 402 is inserted into the middle of the fixing frame 401. The outer wall of the sliding rod 402 is rotatably connected to a first hydraulic telescopic rod 403 through a bearing. A welding module 404 is provided at the upper end of the base plate 1. A second motor 405 is fixedly connected to the rear side of the middle part of the upper surface of the base plate 1. A temperature recognition module 406 is fixedly connected to the output end of the second motor 405. A moving mechanism 407 is provided on the right side of the fixing frame 401. A second hydraulic telescopic rod 408 is hinged to the rear side of the middle part of the first hydraulic telescopic rod 403. Another set of fixing frames 401 and sliding rods 402 is provided in the middle part of the base plate 1. The lower end of the second hydraulic telescopic rod 408 is hinged to the outer wall of the sliding rod 402 in the middle part of the base plate 1.

[0046] The welding mechanism 4 is a multi-degree-of-freedom follower structure. The welding mechanism 4 includes a fixed frame 401, a slide rod 402, a first hydraulic telescopic rod 403, a welding module 404, a second motor 405, a temperature recognition module 406, a second hydraulic telescopic rod 408, and a moving mechanism 407. The fixed frame 401 is fixed to the base plate 1, the slide rod 402 can slide left and right, the first hydraulic telescopic rod 403 extends and retracts to drive the welding module 404 to move, the second hydraulic telescopic rod 408 controls the relative front and back angle of the welding module 404, the second motor 405 controls the posture of the temperature recognition module 406, and through the control module 2 based on the diameter of the pipe, the welding module 404 is adjusted up and down and back and forth to ensure that the welding point is always located at the bottom center of the pipe, ensuring that the molten pool is formed under the direction of gravity and the weld is uniform. The control module 2 also controls the second motor 405 to adjust the angle of the detection end of the temperature recognition module 406 so that it is always aligned with the welding point for temperature detection.

[0047] After the welding mechanism 4 is activated in the application, the welding module 404 moves up and down and back and forth under the drive of the first hydraulic telescopic rod 403 and the second hydraulic telescopic rod 408, precisely adjusting the height of the welding head so that it is aligned with the lower side of the weld joint of the two pipe sections. The welding direction of the welding module 404 is right-lower-up welding. Since the first hydraulic telescopic rod 403 can rotate relative to the slide rod 402, the second hydraulic telescopic rod 408 adjusts the front and back posture of the welding module 404 to ensure that the welding head is directly facing the center of the gap, ensuring that the weld point is always directly below the direction of gravity of the equipment. The molten pool is located at the lower center, which can effectively reduce the interference of gravity on the molten metal, improve the stability of the weld depth and the quality of weld formation.

[0048] The temperature recognition module 406 is adjusted by the second motor 405 to continuously track the temperature change of the center point of the welding area according to the diameter of the pipe fitting. The temperature information is fed back to the control module 2 in real time to provide a reference for the control of the molten pool. Throughout the process, rotation, vertical positioning and temperature recognition work together to ensure the stability of the molten pool and consistent welding.

[0049] Example 3:

[0050] Please see Figure 1-6 Based on Embodiment 1 and Embodiment 2, a lateral movement adjustment and multi-component linkage adjustment structure is further added, including a moving mechanism 407 located on the right side of the fixed frame 401. The moving mechanism 407 includes a third motor 701, a transmission rod 702, a rhombus block 703, a spring 704, and a second electric telescopic rod 705. The third motor 701 drives the rhombus block 703 to rotate through the transmission rod 702, pushing the second electric telescopic rod 705 located on its left side to generate reciprocating movement in the left and right directions. The second electric telescopic rod 705 drives the slide bar 402 to move laterally as a whole, so that the welding module 404 can swing laterally during the welding process, so that it moves synchronously during the welding process, improves the consistency of the weld and achieves high-quality automatic welding.

[0051] This embodiment further realizes the lateral swing function of the welding head during the welding process, which is used to achieve a wider weld or improve the shape. As the welding mechanism 4 drives the pipe to rotate at a constant speed, the third motor 701 starts and drives the transmission rod 702 to rotate, thereby causing the rhombus block 703 to rotate. During the rotation of the rhombus block 703, due to its long length at the top and bottom ends, it will act on the second electric telescopic rod 705 on its left side, causing it to push the slide rod 402 to move laterally back and forth under the support of the spring 704, thereby driving the welding module 404 to swing synchronously in the left and right directions. This structure allows the welding head to stay in the center position at the bottom of the weld during the welding process, and can also move back and forth slightly from left to right, widening the molten pool trajectory, avoiding undercut, and improving the weld formation quality. The control module 2 controls the motor rhythm according to the preset swing frequency to achieve precise swing welding.

[0052] Example 4:

[0053] Please see Figure 1-6Based on Embodiments 1, 2, and 3, the present invention provides a technical solution: a plurality of first electric telescopic rods 306 can extend and retract according to the diameter of the pipe fitting, and the maximum clamping range is set by the control module 2 to adapt to different pipe fitting diameters. During the welding process, the welding module 404 automatically adjusts the swing amplitude and welding power according to the welding temperature changes detected by the temperature recognition module 406. The control module 2 establishes a temperature-speed closed-loop model to achieve stable control of the molten pool. When abnormal fluctuations in welding temperature are detected, such as the molten pool being too shallow or too deep, the control module 2 automatically adjusts the rotation speed of the first motor 302 or the welding current parameters to achieve stable molten pool, adaptive compensation welding control, and improve welding reliability.

[0054] The pipe welding equipment and its usage method disclosed in this application form a comprehensive welding solution with strong adaptability, high welding precision, and high automation by introducing an automatically adjustable clamping structure, a rotary drive mechanism, an adjustable posture welding module 404, a temperature recognition feedback system, and a mechanical linkage movement mechanism 407 that enables the welding head to swing back and forth. This is achieved by introducing an automatically adjustable clamping structure, a rotary drive mechanism, an adjustable posture welding module 404, a temperature recognition feedback system, and a mechanical linkage movement mechanism 407 that enables the welding head to swing back and forth. Specifically, the first electric telescopic rod 306 drives the clamping block 307 to automatically fit pipes of different sizes, achieving rapid and efficient automatic clamping and positioning, ensuring initial stability and coaxial accuracy of the pipes during the welding process. The first motor 302 and the arc-shaped toothed plate 308, in conjunction with the lower fixed frame 304 and the upper fixed frame 305, achieve the rotary drive for clamping the pipes, ensuring continuous weld formation while minimizing welding interruptions. The dual hydraulic telescopic rods respectively enable precise position adjustment of the welding module 404 in the left-right and front-back directions, ensuring that the weld point is always in the direction of the equipment's gravity. Directly below, the molten pool is located at the lower center, which effectively reduces the interference of gravity and welding angle changes on the molten metal. The temperature recognition module 406 monitors the welding point temperature in real time and feeds it back to the control module 2. Based on the feedback results, the welding parameters and position are dynamically adjusted to effectively avoid weld quality problems caused by heat input fluctuations. The third motor 701 drives the transmission rod 702, which has a diamond block 703 on the outer wall, to rotate. The contact between the diamond block 703 and the second electric telescopic rod 705 realizes the automatic left and right swing of the welding head, further expanding the coverage of the welding fusion band, making the weld more uniform and the shape more natural. Combined with the spring 704 reset structure, the continuity and stability of the movement are ensured, improving the weld quality and appearance consistency. At the same time, the control module 2 centrally controls each drive unit to improve welding efficiency and consistency. The whole solution has a reasonable structure, complete functions, and close cooperation, and can be widely used in welding scenarios of round pipes of various sizes and materials.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe welding apparatus comprising a base plate (1) and a control module (2) arranged on the upper side of the base plate (1), characterized in that: The upper side of the bottom plate (1) is provided with two groups of fixing mechanisms (3), and a welding mechanism (4) is arranged between the two groups of fixing mechanisms (3); The fixing mechanism (3) comprises a transmission assembly, a lower fixing frame (304) and an upper fixing frame (305) on the transmission assembly, and the lower fixing frame (304) and the upper fixing frame (305) are both semicircular arc plates, and the front end of the lower fixing frame (304) is hinged to the front end of the upper fixing frame (305), and the lower fixing frame (304) and the upper fixing frame (305) can be closed to form a ring structure; The welding mechanism (4) comprises a connecting assembly and a welding module (404) on the connecting assembly, and the welding module (404) can move in the front-back-up-down direction under the support of the connecting assembly; The control module (2) is electrically connected with the fixing mechanism (3), the welding mechanism (4) and the execution components, for controlling the integrated rotation of the upper fixing frame (305) and the lower fixing frame (304) after clamping the pipe, the movement of the welding module (404) to the pipe connection and the execution of welding, and the real-time adjustment of the position of the welding module (404) during the welding process; The connecting assembly comprises a fixed frame (401), the lower side of the fixed frame (401) is fixedly connected with the upper side of the bottom plate (1), a sliding rod (402) is inserted into the middle part of the fixed frame (401), a first hydraulic telescopic rod (403) is rotatably connected to the outer wall of the sliding rod (402) through a bearing, a welding module (404) is arranged at the upper end of the first hydraulic telescopic rod (403), and a moving mechanism (407) is arranged on the right side of the fixed frame (401); A second motor (405) is fixedly connected to the output end of the first hydraulic telescopic rod (403), a temperature identification module (406) is fixedly connected to the output end of the second motor (405), a second hydraulic telescopic rod (408) is hinged to the middle rear side of the first hydraulic telescopic rod (403), and another group of fixed frames (401) and sliding rods (402) are arranged in the middle part of the bottom plate (1), and the lower end of the second hydraulic telescopic rod (408) is hinged to the outer wall of another group of sliding rods (402) in the middle part of the bottom plate (1); The moving mechanism (407) comprises a third motor (701), the output end of the third motor (701) is fixedly connected with a transmission rod (702), the outer wall of the transmission rod (702) is fixedly connected with a rhombus block (703), the right ends of the two sliding rods (402) are both fixedly connected with a second electric telescopic rod (705), the outer walls of the two sliding rods (402) are both fixedly connected with a spring (704), and the other end of the spring (704) is fixedly connected with the outer wall of the fixed frame (401); The first hydraulic telescopic rod (403), the second motor (405), the temperature identification module (406), the second hydraulic telescopic rod (408), the second electric telescopic rod (705) and the third motor (701) are all electrically connected with the control module (2). And the temperature identification module (406) is used for detecting the welding point temperature, and the second motor (405) is used for controlling the deflection angle of the temperature identification module (406), so that the temperature identification module (406) is always directed to the welding point; The third motor (701) drives the rotation of the rhombus block (703) to push the second electric telescopic rod (705) and the slide rod (402) to move back and forth in the left-right direction, and the second electric telescopic rod (705) can adjust its length to adjust the left-right moving range.

2. A pipe welding apparatus according to claim 1, wherein: The transmission assembly comprises a support (301), the lower side of the support (301) is fixedly connected with the upper side of the bottom plate (1), the middle part of the support (301) is fixedly connected with a first motor (302), the output end of the first motor (302) is fixedly connected with a bevel gear, the side wall of the support (301) is also rotatably connected with a roller (303) through a bearing, a lower fixed frame (304) is placed on the upper side of the roller (303) to rotate and support, the lower fixed frame (304) and an upper fixed frame (305) are both fixedly connected with first electric telescopic rods (306), one end of each first electric telescopic rod (306) towards the inside of the lower fixed frame (304) and the upper fixed frame (305) is fixedly connected with a clamping block (307), the inner walls of the lower fixed frame (304) and the upper fixed frame (305) are both fixedly connected with arc-shaped toothed plates (308), and the outer wall of each arc-shaped toothed plate (308) is in transmission connection with the output end of the first motor (302) through a bevel gear.

3. A pipe welding apparatus according to claim 2, wherein: The lower side of the lower fixed frame (304) is provided with four rollers (303), the four rollers (303) are arranged on the two supports (301) respectively, and the upper sides of the lower fixed frame (304) and the upper fixed frame (305) are both provided with six first electric telescopic rods (306), and the two arc-shaped toothed plates (308) can form a ring gear.

4. A pipe welding apparatus according to claim 3, wherein: The first electric telescopic rods (306) are electrically connected with the control module (2), and under the regulation of the control module (2), the first electric telescopic rods (306) are used for synchronous telescoping and can be attached to the outer wall of the pipe to support the pipe. The first motor (302) is electrically connected with the control module (2), and the first motor (302) drives the lower fixed frame (304) and the upper fixed frame (305) to rotate through the bevel gear and the arc-shaped toothed plate (308).

5. A method of using a pipe welding apparatus according to any one of claims 1-4, characterized in that: The method comprises the following steps: S1: placing two pipe sections to be welded above two groups of fixing mechanisms (3) on the bottom plate (1) so that the axes are aligned and fall into the bearing area of the lower fixed frame (304); S2: the lower fixed frame (304) and the upper fixed frame (305) are folded to form a ring-shaped clamping structure, the control module (2) controls the first electric telescopic rods (306) to extend, drives the clamping blocks (307) to attach to the outer wall of the pipe, and realizes automatic adaptation and clamping of pipes of different sizes. S3: The first motor (302) is started, and its output drives the arc-shaped tooth plate (308) through bevel gears, thereby driving the lower fixed frame (304), the upper fixed frame (305), and the clamped pipe to rotate around the shaft, providing continuous rotary motion for welding; S4: The first hydraulic telescopic rod (403) in the welding mechanism (4) cooperates with the slide rod (402) to adjust the position of the welding module (404), and the front and rear postures are adjusted through the second hydraulic telescopic rod (408), so that the welding head is always aligned with the center of the weld bottom; S5: The second motor (405) controls the deflection angle of the temperature identification module (406), so that it continuously monitors the temperature towards the welding point, and the temperature data is fed back to the control module in real time to assist in adjusting the welding parameters and posture following; S6: The third motor (701) is started, the second electric telescopic rod (705) is driven to reciprocate through the diamond block (703), the slide rod (402) and the welding module (404) are driven to produce reciprocating swing in the left and right directions, and the welding is completed.

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