Pipe fitting welding equipment and using method thereof

Abstract

The invention discloses pipe fitting welding equipment and a using method thereof, and relates to the technical field of pipe fitting welding, the pipe fitting welding equipment comprises a bottom plate and a control module arranged on the upper side of the bottom plate, two sets of fixing mechanisms are arranged on the upper side of the bottom plate, a welding mechanism is arranged between the two sets of fixing mechanisms, and fixing and centering positioning of two sections of pipe fittings are achieved; the clamping assembly is driven by a first motor and rotates through an arc-shaped toothed plate, a stable foundation is provided for follow-up welding, the fixing mechanism comprises a transmission assembly, a lower fixing frame and an upper fixing frame, the lower fixing frame and the upper fixing frame are arranged on the transmission assembly, and the lower fixing frame and the upper fixing frame are both semi-arc-shaped plates. The pipe fitting is integrally rotated, the welding gun is fixed, it is effectively guaranteed that a molten pool is always located in the center area of the lower side of the pipe fitting, disturbance of gravity to molten metal is reduced, stability and forming quality of the molten pool in the welding process are improved, and the device has the advantages of being high in practicability and improving welding penetration depth and welding seam forming quality.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe welding, in particular to a pipe welding device and a use method thereof. Background Art

[0002] At present, in the field of pipe welding, especially in the oil, natural gas, chemical and shipbuilding industries, butt welding between round pipes is a common and critical connection process. Most existing pipe welding equipment adopts a welding method in which the pipe is fixed and the welding head rotates around the pipe. The structure of this type of equipment is relatively compact, which facilitates multi-angle welding and is suitable for working environments with limited space.

[0003] The existing pipe welding device with publication number CN114273812A has a welding gun drive assembly that can move along the outer circle of the pipe, thereby being able to uniformly weld the pipe joints. In the process of the welding gun bracket moving around the outer circle of the pipe, the push rod reciprocates and contacts the raised portion on the semicircular top plate, and then the welding gun bracket swings back and forth, so that fish scale welding is achieved at the welding point of the pipe, and the fish scale weld pattern has a 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 offset, insufficient penetration, and unstable forming, thereby affecting the welding quality and weld consistency.

[0004] To improve welding quality, some existing equipment adjusts the welding process by installing multi-axis linkage welding heads, introducing visual or temperature monitoring systems, and controlling the welding gun's posture. However, these solutions generally suffer from the following shortcomings: complex structures and high costs hinder their widespread adoption. Because the pipe remains stationary during welding, the welding gun travels a long path, requiring high-level path planning and trajectory control. Furthermore, the position of the molten pool constantly changes during welding, making it difficult to maintain the molten metal in a stable zone where gravity exerts minimal effects, which can easily lead to welding defects.

[0005] Therefore, there is an urgent need for a pipe welding device that can realize the rotation of the pipe itself, the fixed or small-range follow-up movement of the welding head, and ensure that the molten pool is always located in the lower center area, so as to reduce gravity interference, improve welding penetration and weld formation quality, and improve clamping stability and welding consistency through structural optimization to achieve high-quality automated welding. Summary of the Invention

[0006] The object of the present invention is to provide a pipe welding device and a method of using the same to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a pipe welding device, comprising a base plate and a control module arranged on the upper side of the base plate, two sets of fixing mechanisms are arranged on the upper side of the base plate, and a welding mechanism is arranged between the two sets of fixing mechanisms to achieve the fixation and centering of two sections of pipe fittings, providing a stable foundation for subsequent welding; The fixing mechanism includes a transmission assembly and 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, 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 realize the wrapped clamping of pipes of different sizes, and has a stable structure and strong adaptability. The welding mechanism includes a connecting component and a welding module on the connecting component. The welding module can move in the front, back, up and down directions with the support of the connecting component, thereby realizing multi-position adjustment of the welding head in space and enhancing the welding alignment accuracy.

[0008] The transmission assembly includes a bracket, the lower side of the bracket is fixedly connected to the upper side of the base plate, the middle of the bracket is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the bevel gear, and the side wall of the bracket is also rotatably connected to the roller through a bearing. The lower fixed frame is placed on the upper side of the roller, and the lower fixed frame and the upper fixed frame are fixedly connected to the first electric telescopic rod, and the first electric telescopic rod is fixedly connected to one end facing the lower fixed frame and the inside of the upper fixed frame with a clamping block, and the inner walls of the lower fixed frame and the upper fixed frame are fixedly connected to the arc tooth plate, and the outer wall of the arc tooth plate is transmission-connected to the output end of the first motor through the bevel gear, and the arc tooth plate is driven by the first motor to realize synchronous rotation of the clamping device with the pipe fitting, thereby providing power support for realizing rotary welding.

[0009] 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 provided on two brackets, and six first electric telescopic rods are provided on the lower fixed frame and the upper fixed frame, and the two arc-shaped tooth plates can form a ring gear, thereby improving the clamping stability and the uniformity of the clamping force distribution, and enhancing the adaptability to large-size pipe fittings and the rotation synchronization accuracy.

[0010] 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 plurality of first electric telescopic rods are uniformly controlled by the control module to synchronously fit the outer wall of the pipe fitting to support the pipe fitting; 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 tooth plate, thereby realizing multi-point synchronous control, ensuring uniform and stable clamping action, and cooperating with the rotation control to improve the overall coordination and degree of operation automation.

[0011] According to the above technical solution, the connecting assembly includes a fixed frame, the lower side of the fixed frame is fixedly connected to the upper side of the base plate, a sliding rod is inserted in the middle of the fixed frame, the outer wall of the sliding rod is rotatably connected to the first hydraulic telescopic rod through a bearing, the upper end of the first hydraulic telescopic rod is provided with a welding module, and a moving mechanism is provided on the right side of the fixed frame to achieve stable support and displacement capability of the welding head, providing multi-degree-of-freedom support for welding angle and position adjustment.

[0012] According to the above technical solution, a second motor is fixedly connected to the rear middle side of the upper surface of the base plate, the output end of the second motor is fixedly connected to the temperature identification module, the rear middle side of the first hydraulic telescopic rod is hinged to the second hydraulic telescopic rod, and another set of fixed frames and sliding rods are 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 identification module has the ability to follow up, can flexibly adjust the direction and track the welding point, and improve the accuracy of real-time monitoring of the welding temperature.

[0013] According to the above technical solution, the moving mechanism includes a third motor, the output end of the third motor is fixedly connected to a transmission rod, the outer wall of the transmission rod is fixedly connected to a diamond block, and the right ends of the two sliding rods are fixedly connected to the second electric telescopic rod, the outer walls of the two sliding rods are fixedly connected to a spring, the other end of the spring is fixedly connected to the outer wall of the fixed frame, and the telescopic rod is pushed by the diamond block to realize the reciprocating swing of the welding module in the left and right directions, thereby improving the uniformity of weld formation.

[0014] 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; 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; The diamond block has a diamond structure. The third motor drives the diamond block to rotate, which can push the second electric telescopic rod and the sliding 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 amplitude. Through full-process control, real-time tracking of the welding point temperature and linkage control of the welding posture are achieved, thereby improving the intelligence level of the welding process and the consistency of the weld.

[0015] A method for using a pipe welding device comprises the following steps: S1: Place the two sections of round pipe to be welded between the two sets of fixing mechanisms above the bottom plate of the equipment, align their axes and drop them into the supporting area of ​​the lower fixing frame; S2: The control module controls the extension of the multiple first electric telescopic rods, drives the clamping blocks to fit the outer wall of the pipe, and closes the lower and upper fixing frames to form an annular clamping structure, thereby automatically adapting and clamping pipes of different sizes. S3: The first motor starts, and its output drives the arc-shaped tooth 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 rotation for welding; S4: The first hydraulic telescopic rod and the slide rod in the welding mechanism cooperate to adjust the position of the welding module, and the second hydraulic telescopic rod is used to adjust the front and rear posture so that the welding head is always aligned with the center of the bottom of the weld; S5: The second motor controls the deflection angle of the temperature recognition module so that it continuously faces the welding point for temperature monitoring. The temperature data is fed back to the control module in real time to assist in adjusting welding parameters and posture tracking. S6: Start the third motor to drive the second electric telescopic rod to reciprocate and extend 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 welds or improve the forming quality until the welding is completed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by providing a fixing mechanism for adaptively clamping pipes of different sizes, and by having multiple first electric telescopic rods drive the clamping blocks to fit the outer walls of the pipes, the present invention can achieve precise clamping and centering of pipes of different outer diameters, ensuring rotational stability and weld alignment accuracy; By providing a clamping assembly driven by a first motor and rotating with an arc-shaped tooth plate, the pipe is rotated as a whole while the welding gun is fixed, effectively ensuring that the molten pool is always located in the center area of ​​the lower side of the pipe, reducing the disturbance of gravity on the molten metal, and improving the stability of the molten pool and the forming quality during the welding process; By setting up a movable welding mechanism and an angle-adjustable temperature recognition module, the position and posture of the welding head can be adjusted in real time according to the position of the welding point, achieving precise alignment and dynamic tracking of the molten pool temperature during the welding process, improving welding consistency and heat input control accuracy; By providing a welding module for driving the welding head to swing horizontally, combined with the diamond block, the second electric telescopic rod and the sliding rod, the welding head can achieve synchronous swing in the left and right directions, widening the range of the molten pool trajectory, improving the weld formation effect and avoiding edge defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the fixing mechanism of the present invention; Figure 3 This is a schematic diagram of the upper fixed frame travel structure of the present invention; Figure 4 This is a schematic diagram of the split structure of the fixing mechanism of the present invention; Figure 5 It is a structural schematic diagram of the welding mechanism of the present invention; Figure 6 It is a schematic structural diagram of the mobile mechanism of the present invention; In the figure: 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 tooth plate, 401 fixing frame, 402 sliding 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 diamond block, 704 spring, 705 second electric telescopic rod. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: See also Figure 1-4 , the present invention provides a technical solution: a pipe welding device, including a base plate 1, a control module 2, two sets of fixing mechanisms 3 and a welding mechanism 4 arranged 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, a clamping block 307 and an arc-shaped tooth plate 308, wherein the lower fixing frame 304 and the upper fixing frame 305 are hinged to form an openable and closable structure for adapting to pipes of different diameters, the first electric telescopic rod 306 is extended and drives the clamping block 307 to fit the outer wall of the pipe to achieve stable fixation, the first motor 302 cooperates with the arc-shaped tooth plate 308 through the 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 rotary welding preparation, through this structure, high-precision positioning and uniform rotation of the pipe are achieved, providing a basis for a stable molten pool below; In actual application of this device, the operator places two sections of round pipes to be welded horizontally between the two groups of welding mechanisms 4 of the equipment, and respectively places them on the lower fixed frame 304. The control module 2 issues an instruction, and multiple first electric telescopic rods 306 are extended synchronously, driving the clamping block 307 to fit the outer wall of the pipe fitting to achieve wrapping and clamping of the pipe fitting. The upper fixed frame 305 is closed with the lower fixed frame 304 under the action of the hinge structure to form a complete encircling structure, which is suitable for pipe fittings of different sizes.

[0020] Next, the first motor 302 is activated, and its output shaft, through the meshing of bevel gears with the curved toothed plate 308, drives the upper and lower fixed frames to rotate around the pipe axis. This rotation forms the basis for continuous welding motion, putting the system in a ready-to-weld state and creating a stable rotating platform for subsequent welding mechanism operations.

[0021] Example 2: See also Figure 1-6 On the basis of the first embodiment, the present invention provides a technical solution: the welding mechanism 4 includes a connecting assembly and a welding module 404 on the connecting assembly. The welding module 404 can move in the front, back, up and down directions under the support of the connecting assembly. The connecting assembly includes a fixing frame 401. The lower side of the fixing frame 401 is fixedly connected to the upper side of the bottom 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 the first hydraulic telescopic rod 403 through a bearing. The first hydraulic telescopic rod 403 A welding module 404 is provided at the upper end, a second motor 405 is fixedly connected to the rear middle part of the upper surface of the bottom plate 1, and 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 fixed frame 401, and a second hydraulic telescopic rod 408 is hinged to the rear middle part of the first hydraulic telescopic rod 403. Another set of fixed frames 401 and sliding rod 402 are provided in the middle of the bottom plate 1, and the lower end of the second hydraulic telescopic rod 408 is hinged to the outer wall of the sliding rod 402 in the middle of the bottom plate 1; The welding mechanism 4 is a multi-degree-of-freedom follow-up structure, which includes a fixed frame 401, a slide bar 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 bar 402 can slide left and right, the first hydraulic telescopic rod 403 is telescopic to drive the welding module 404 to move, the second hydraulic telescopic rod 408 controls the relative front and rear angles of the welding module 404, and the second motor 405 controls the posture of the temperature recognition module 406. The control module 2 adjusts the welding module 404 up and down and front and back based on the diameter of the pipe so 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 second motor 405 is controlled 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. After the welding mechanism 4 is started during application, the welding module 404 is driven by the first hydraulic telescopic rod 403 and the second hydraulic telescopic rod 408 to move up and down and forward and backward, accurately adjusting the height of the welding head so that it is aligned with the lower side of the weld joint of the two sections of pipe fittings, and the welding direction of the welding module 404 is right bottom upward welding. Since the first hydraulic telescopic rod 403 can rotate relative to the slide rod 402, the front and rear posture of the welding module 404 is adjusted by the second hydraulic telescopic rod 408 to ensure that the welding head is aligned with the center of the gap and the welding point is always directly below the gravity direction of the equipment. The molten pool is located in the center of the lower side, which can effectively reduce the interference of gravity on the molten metal and improve the stability of penetration and the quality of weld formation. The temperature recognition module 406 is angle-adjusted by the second motor 405 so that it continuously tracks the temperature changes at the center of the welding area according to the diameter of the pipe. The temperature information is fed back to the control module 2 in real time to provide a reference for the molten pool control. During the entire process, rotation, up and down positioning and temperature recognition cooperate with each other to ensure a stable molten pool and consistent welding.

[0022] Example 3: See also Figure 1-6 On the basis of the first and second embodiments, a lateral movement adjustment and multi-component linkage adjustment structure are further added, including a moving mechanism 407 arranged on the right side of the fixed frame 401. The moving mechanism 407 includes a third motor 701, a transmission rod 702, a diamond block 703, a spring 704 and a second electric telescopic rod 705. The third motor 701 drives the diamond block 703 to rotate through the transmission rod 702, pushing the second electric telescopic rod 705 arranged on the left side thereof to generate reciprocating movement in the left and right directions. The second electric telescopic rod 705 drives the sliding rod 402 to move horizontally as a whole, so that the welding module 404 generates lateral swing 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. 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 forming. As the welding mechanism 4 drives the pipe to rotate at a uniform speed, the third motor 701 starts and drives the transmission rod 702 to rotate, thereby driving the diamond block 703 to rotate. During the rotation of the diamond block 703, due to the longer lengths of its upper and lower ends, it will act on the second electric telescopic rod 705 on its left side, causing it to push the slide bar 402 to move back and forth laterally 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 remain at the center position of the bottom of the weld during the welding process, and to move back and forth slightly left and right, thereby widening the molten pool trajectory, avoiding undercutting, and improving the quality of weld formation. The control module 2 controls the motor rhythm according to the preset swing frequency to achieve precise swing welding.

[0023] Example 4: See also Figure 1-6Based on the first, second, and third embodiments, the present invention provides a technical solution: a plurality of first electric telescopic rods 306 can be extended and retracted according to the diameter of the pipe, and the maximum clamping range is set by the control module 2 to accommodate pipe diameters of different sizes. During the welding process, the welding module 404 automatically adjusts the swing amplitude and the 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 the welding temperature are detected, such as when the molten pool is too shallow or too deep, the control module 2 automatically adjusts the rotation speed or welding current parameters of the first motor 302 to achieve stable and adaptive compensation welding control of the molten pool, thereby improving welding reliability.

[0024] The pipe welding equipment and its use method disclosed in the present application form a comprehensive welding solution with strong adaptability, high welding precision and high degree of 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 moving mechanism 407 for realizing left and right reciprocating swing of the welding head on the basis of traditional pipe welding equipment. The first electric telescopic rod 306 drives the clamping block 307 to automatically fit pipes of different sizes, realizing fast and efficient automatic clamping and positioning, ensuring the initial stability of the welding process and the coaxial accuracy of the pipes, and the first motor 302 and the arc-shaped tooth plate 308 link the lower fixed frame 304 and the upper fixed frame 305 to realize the rotational drive of the clamped pipe, ensuring the continuous formation of the weld while reducing welding interruptions, and the double hydraulic telescopic rods respectively realize the fine position adjustment of the welding module 404 in the left and right and front and back directions, ensuring that the weld point is always in the gravity direction of the equipment. Directly below, the molten pool is located in the center of the lower side, which can effectively reduce the interference of gravity and changes in welding angle on the molten metal. The temperature of the welding point is monitored in real time by the temperature recognition module 406 and fed back to the control module 2. The welding parameters and position posture are dynamically adjusted according to the feedback results, effectively avoiding weld quality problems caused by heat input fluctuations. The transmission rod 702 with a diamond block 703 on the outer wall is driven to rotate by the third motor 701, and the contact between the diamond block 703 and the second electric telescopic rod 705 is used to realize the automatic left and right swing of the welding head, further expanding the coverage of the welding fusion zone, 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, and the weld quality and appearance consistency are improved. 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 with each other, and can be widely used in round pipe welding scenarios of various sizes and materials.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pipe welding device, comprising a base plate (1) and a control module (2) arranged on the upper side of the base plate (1), characterized in that: Two sets of fixing mechanisms (3) are provided on the upper side of the bottom plate (1), and a welding mechanism (4) is provided between the two sets of fixing mechanisms (3); The fixing mechanism (3) comprises a transmission assembly and a lower fixing frame (304) and an upper fixing frame (305) on the transmission assembly, wherein the lower fixing frame (304) and the upper fixing frame (305) are both semicircular arc-shaped 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, wherein the welding module (404) is capable of moving in the front-back and up-down directions with the support of the connecting assembly; The control module (2) is electrically connected to the fixing mechanism (3) and the execution components of the welding mechanism (4), and is used to control the upper fixing frame (305) and the lower fixing frame (304) to rotate integrally after closing and clamping the pipe, the welding module (404) to move to the pipe connection and perform welding, and the real-time adjustment of the position of the welding module (404) during the welding process.

2. The pipe welding equipment according to claim 1, characterized in that: The transmission assembly comprises a bracket (301), the lower side of the bracket (301) is fixedly connected to the upper side of the bottom plate (1), the middle part of the bracket (301) is fixedly connected to a first motor (302), the output end of the first motor (302) is fixedly connected to a bevel gear, the side wall of the bracket (301) is also rotatably connected to a roller (303) through a bearing, the lower fixed frame (304) is placed on the upper side of the roller (303) for rotational support, and the lower fixed frame (304) is fixedly connected to the middle part of the bracket (301). 4) and the upper fixed frame (305) are fixedly connected to a first electric telescopic rod (306), one end of the first electric telescopic rod (306) facing the interior of the lower fixed frame (304) and the upper fixed frame (305) is fixedly connected to a clamping block (307), the inner walls of the lower fixed frame (304) and the upper fixed frame (305) are fixedly connected to an arc-shaped toothed plate (308), and the outer wall of the arc-shaped toothed plate (308) is transmission-connected to the output end of the first motor (302) via a bevel gear.

3. The pipe welding equipment according to claim 2, characterized in that: Four rollers (303) are provided on the lower side of the lower fixed frame (304), and the four rollers (303) are respectively provided on two brackets (301). Six first electric telescopic rods (306) are provided on both the lower fixed frame (304) and the upper fixed frame (305), and the two arc-shaped tooth plates (308) can form a ring gear.

4. The pipe welding equipment according to claim 3, characterized in that: The first electric telescopic rods (306) are electrically connected to the control module (2), and the plurality of first electric telescopic rods (306) are used to synchronously extend and retract under the control of the control module (2) and to fit the outer wall of the pipe to support the pipe; The first motor (302) is electrically connected to the control module (2), and the first motor (302) is connected to the arc-shaped toothed plate (308) via a bevel gear to drive the lower fixed frame (304) and the upper fixed frame (305) to rotate.

5. The pipe welding equipment according to claim 4, characterized in that: The connecting assembly includes a fixed frame (401), the lower side of the fixed frame (401) is fixedly connected to the upper side of the base plate (1), a sliding rod (402) is inserted into the middle of the fixed 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 first hydraulic telescopic rod (403), and a moving mechanism (407) is provided on the right side of the fixed frame (401).

6. The pipe welding equipment according to claim 5, characterized in that: A second motor (405) is fixedly connected to the rear middle portion of the upper surface of the base plate (1), a temperature identification module (406) is fixedly connected to the output end of the second motor (405), a second hydraulic telescopic rod (408) is hingedly connected to the rear middle portion of the first hydraulic telescopic rod (403), another set of fixed frames (401) and a sliding rod (402) is provided in the middle portion of the base plate (1), and the lower end of the second hydraulic telescopic rod (408) is hingedly connected to the outer wall of the sliding rod (402) in the middle portion of the base plate (1).

7. The pipe welding equipment according to claim 6, characterized in that: The moving mechanism (407) includes a third motor (701), the output end of the third motor (701) is fixedly connected to a transmission rod (702), the outer wall of the transmission rod (702) is fixedly connected to a diamond block (703), and the right ends of the two sliding rods (402) are fixedly connected to a second electric telescopic rod (705), the outer walls of the two sliding rods (402) are fixedly connected to a spring (704), and the other end of the spring (704) is fixedly connected to the outer wall of the fixed frame (401).

8. The pipe welding equipment according to claim 7, characterized in that: The first hydraulic telescopic rod (403), the second motor (405), the temperature recognition module (406), the second hydraulic telescopic rod (408), the second electric telescopic rod (705) and the third motor (701) are all electrically connected to the control module (2); The temperature recognition module (406) is used to detect the temperature of the welding point, and the second motor (405) is used to control the deflection angle of the temperature recognition module (406) to ensure that the temperature recognition module (406) is always facing the welding point; The diamond block (703) is a diamond structure. The third motor (701) drives the diamond block (703) to rotate, thereby pushing the second electric telescopic rod (705) and the sliding rod (402) to move back and forth in the left and right directions. The second electric telescopic rod (705) can adjust its own length to adjust the left and right movement range.

9. A method for using a pipe welding device, according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Place the two sections of round pipe to be welded between the two sets of fixing mechanisms (3) above the equipment base plate (1), align their axes and drop them into the supporting area of ​​the lower fixing frame (304); S2: The lower fixing frame (304) and the upper fixing frame (305) are closed to form an annular clamping structure, and the control module (2) controls the plurality of first electric telescopic rods (306) to extend, driving the clamping blocks (307) to fit the outer wall of the pipe fitting, thereby achieving automatic adaptation and clamping of pipe fittings of different sizes; S3: The first motor (302) is started, and its output drives the arc-shaped toothed plate (308) through the bevel gear, thereby driving the lower fixed frame (304), the upper fixed frame (305) and the clamped pipe to rotate around the axis, providing continuous rotation for welding; S4: The first hydraulic telescopic rod (403) and the slide rod (402) in the welding mechanism (4) cooperate to adjust the position of the welding module (404), and the front and rear posture is adjusted by the second hydraulic telescopic rod (408) so that the welding head is always aligned with the center of the bottom of the weld; S5: The second motor (405) controls the deflection angle of the temperature recognition module (406) so that it continuously faces the welding point for temperature monitoring, and the temperature data is fed back to the control module in real time to assist in adjusting the welding parameters and posture tracking; S6: Start the third motor (701), drive the second electric telescopic rod (705) to reciprocate and retract through the diamond block (703), and drive the slide rod (402) and the welding module (404) to swing back and forth in the left and right directions until welding is completed.

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