Cold water pipe welding apparatus

Abstract

The application discloses a cold water pipe welding device and belongs to the technical field of welding. The device comprises a rack, a moving device, a positioning tool and a pressing assembly arranged on the rack. The positioning tool is installed on the rack and is provided with an installation notch. The moving device is connected with a welding gun through an adapter plate group. The moving device drives the adapter plate group and the welding gun to move. The adapter plate group adjusts the pitch angle of the welding gun. The welding gun is arranged corresponding to the installation notch. The positioning tool comprises a mounting seat. The top surface of the mounting seat is provided with an installation notch and a clearance groove. The installation notch penetrates through the two side surfaces of the mounting seat along the length direction. The longitudinal section of the installation notch is V-shaped or inverted trapezoidal. The clearance groove is arranged perpendicularly to the installation notch and penetrates through the two side surfaces of the mounting seat along the length direction. The design of the automatic centering, flexible welding and optimized welding position effectively improves the welding precision, efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a cold water pipe welding device. Background Technology

[0002] Welding technology plays a crucial role in modern industrial production, especially in pipe connections, where welding quality directly affects the safety and reliability of the piping system. Cold water pipes, as a common piping material, are widely used in various industries such as construction, chemical engineering, and food processing.

[0003] Traditional cold water pipe welding primarily relies on manual operation. While this method can meet the welding needs of different shapes and sizes to some extent, the welding speed is relatively slow and requires a high level of skill from the operator. During the welding process, manual operation makes it difficult to ensure the uniformity and stability of the weld, easily leading to welding defects such as uneven welds and weld spatter.

[0004] Automated welding equipment has also appeared on the market. Related existing technologies, such as the Chinese patent application "A Water Pipe Welding Machine", application number: CN202420386288.X, disclose a base plate, an L-shaped seat fixedly connected to the upper end of the base plate, a linear module movably connected to the upper end of the L-shaped seat, a rotating support connected to the lower output end of the linear module, a rotating column installed inside the rotating support, an arc welding gun installed on the outer end of the rotating column away from the rotating support, and a positioning pin installed on the lower side of the rotating column.

[0005] However, with the continuous development of industrial technology, the structure and welding requirements of cold water pipes are becoming increasingly diversified and complex. Although existing welding equipment is relatively complete in function, it is still difficult to match the specific structure and welding requirements of cold water pipes in practical applications. In view of the above problems, this utility model proposes a new type of cold water pipe welding equipment, providing a welding device that can better match the specific structure and welding requirements of cold water pipes. Utility Model Content

[0006] The technical problem to be solved by this application is to provide a cold water pipe welding equipment that effectively improves welding accuracy, efficiency and quality through automatic centering, flexible welding and optimized welding position design.

[0007] The technical solution adopted in this application is: a cold water pipe welding equipment, including a frame, on which a moving device, a positioning fixture and a pressing component are provided. The positioning fixture is installed on the frame and has an installation slot. The pressing component is located above the positioning fixture. When the pressing component is working, it acts on the cold water pipe placed on the positioning fixture. The moving device is connected to the welding torch through an adapter plate assembly. When the moving device is working, it drives the adapter plate assembly and the welding torch to move. When the adapter plate assembly is working, it adjusts the pitch angle of the welding torch. The welding torch is set in accordance with the installation slot. The positioning fixture includes a mounting base. The top surface of the mounting base has a mounting slot and a clearance slot. The mounting slot extends through both sides of the mounting base along its length. The longitudinal section of the mounting slot is V-shaped or an inverted trapezoid. The clearance slot is perpendicular to the mounting slot and extends through both sides of the mounting base along its length.

[0008] Compared with existing technologies, the advantages of this application are as follows: First, the mounting slot on the positioning fixture is designed in a V-shape or an inverted trapezoid, which enables automatic centering of the cold water pipe. When the cold water pipe is placed into the mounting slot, regardless of its initial position, it will automatically slide towards the center position under the guidance of gravity and the shape of the slot, thereby ensuring the precise positioning of the cold water pipe during welding, improving welding accuracy and quality, and reducing welding defects caused by positioning deviations.

[0009] Secondly, the clearance groove design of the positioning fixture is perpendicular to the installation slot and extends along both sides of the mounting base. This clearance groove fully exposes the areas of the cold water pipe to be welded, providing sufficient operating space for the welding torch and ensuring unobstructed welding. Simultaneously, this structure also helps protect the non-welded parts of the cold water pipe during welding, preventing weld spatter or heat from affecting other areas, thus improving weld quality and the overall performance of the cold water pipe.

[0010] Finally, the moving device connects to the welding torch via an adapter plate assembly, enabling the movement of both the adapter plate assembly and the welding torch. Simultaneously, the adapter plate assembly adjusts the pitch angle of the welding torch. This design allows the welding torch to flexibly reach various welding positions on the cold water pipe and adjust the welding angle according to different welding requirements, achieving efficient and flexible welding operations. Whether welding straight lines or complex shapes, it can handle them with ease, improving welding efficiency and the equipment's applicability.

[0011] In some embodiments of this application, the mounting base has a disc-shaped structure and is rotatably mounted on the frame.

[0012] The mounting base has a disc-shaped structure that facilitates its rotation on the frame. This rotating structure allows the cold water pipe on the mounting base to rotate during the welding process. The rotation of the cold water pipe, in conjunction with the welding torch, enables the torch to perform full-circumference welding on the cold water pipe without frequent repositioning of the torch or the cold water pipe, significantly improving welding efficiency. This is particularly suitable for continuous welding of the outer circumference of cold water pipes, ensuring uniformity and continuity of the weld.

[0013] In some embodiments of this application, the positioning fixture includes a base frame, which is mounted on a machine frame. The mounting base is movably mounted on the base frame, and a motor is installed inside the base frame. The output shaft of the motor is connected to the mounting base, and the motor drives the mounting base to rotate.

[0014] The mounting base is movably mounted on the base frame and driven by a motor, enabling automated rotation of the cold water pipe welding process. The motor can precisely control the rotation speed and angle of the mounting base to adapt to different welding speed requirements and welding processes, ensuring the stability and consistency of the welding process. At the same time, this design simplifies operation, reduces manual intervention, further improves welding efficiency and quality, and allows for flexible adjustment of rotation parameters according to actual welding needs.

[0015] In some embodiments of this application, a shelf is provided on one side of the outer peripheral surface of the mounting base. The shelf has a horizontal L-shaped structure and includes a connecting shelf plate and a mounting plate. The mounting plate is connected to the mounting base, and the shelf plate is horizontally arranged on one side of the mounting base.

[0016] The support frame design provides a support point for longer cold water pipes. When the cold water pipe is long, the support frame effectively prevents the end of the pipe from bending and deforming due to gravity, ensuring the shape integrity and stability of the cold water pipe during the welding process. This helps improve welding accuracy, ensures the overall quality and performance of the welded cold water pipe, and reduces welding defects and subsequent welding position deviations caused by cold water pipe deformation.

[0017] In some embodiments of this application, the mounting plate has at least one oblong hole, the length direction of the oblong hole is vertical, and the mounting plate is connected to the mounting base through a fastener passing through the oblong hole.

[0018] The height of the support frame is adjustable through the engagement of the fasteners and the oblong holes. This adjustable structure can accommodate cold water pipes of different diameters or heights, enhancing the versatility and flexibility of the equipment. Regardless of the size of the cold water pipes, stable support at their ends can be ensured by simply adjusting the height of the support frame, further optimizing the welding environment, improving welding quality, and expanding the applicability of the equipment.

[0019] In some embodiments of this application, a centering frame is provided on the other side of the outer peripheral surface of the mounting base, and a through hole is provided on the centering frame, the central axis of the through hole being parallel to the length direction of the mounting slot.

[0020] The centering bracket provides an auxiliary positioning device for the cold water pipe. The central axis of the through-hole is parallel to the length of the mounting slot, helping to pre-position the cold water pipe before or during insertion into the mounting slot, further improving the alignment accuracy between the cold water pipe and the mounting slot. When welding cold water pipes with high precision requirements, this design helps reduce pipe swaying and positional deviation, ensuring the stability of the welding process and the reliability of the weld quality.

[0021] In some embodiments of this application, the centering frame and the mounting base are vertically adjustable, and the centering frame and the support frame are located on the extension lines on both sides of the mounting slot.

[0022] The adjustable connection between the centering frame and the mounting base allows for flexible height adjustment of the centering frame according to actual needs. Furthermore, the centering frame and the support frame are located on the extension lines on both sides of the mounting slot. This structure further optimizes the positioning and support process of the cold water pipes, improves the equipment's flexibility and adaptability to different cold water pipe sizes, and helps improve welding efficiency and quality.

[0023] In some embodiments of this application, the pressing assembly includes a pressing power cylinder and a pressing member. The output shaft of the pressing power cylinder is connected to the pressing member. The pressing member has an overall cylindrical structure and is located directly above the mounting base. The bottom surface of the pressing member has a conical structure.

[0024] In this application, the pressure-down assembly is primarily designed for T-shaped cold water pipes. The conical bottom surface of the pressure member allows for better contact with the upper surface of the T-shaped cold water pipe, achieving vertical pipe alignment and thus improving the uniformity and stability of the downward pressure on the cold water pipe. During welding, this type of pressure member effectively prevents the cold water pipe from shifting or vibrating due to welding heat or external forces, ensuring the stability of the welding process and thereby improving welding quality.

[0025] In some embodiments of this application, the mobile device includes an X-mobile component, a Y-mobile component, and a Z-mobile component. The X-mobile component is mounted on a frame, the Y-mobile component is mounted on the X-mobile component, the Z-mobile component is mounted on the Y-mobile component, and the adapter board assembly is mounted on the Z-mobile component.

[0026] The moving mechanism provides the welding torch with the ability to move in three-dimensional space. Through the coordinated action of these three moving components, the welding torch can reach the welding position on the surface of the cold water pipe, enabling welding operations on the cold water pipe from all directions and at any angle. This highly flexible movement method can adapt to the requirements of various complex shapes of cold water pipes and welding paths, greatly improving the versatility and welding range of the equipment, meeting the needs of different welding scenarios, and further enhancing the applicability and welding efficiency of the equipment.

[0027] In some embodiments of this application, the adapter plate assembly includes a connecting arm and a rotating plate. The connecting arm is mounted on a moving device, and the rotating plate and the connecting arm are connected by a rotary power cylinder. The welding torch is mounted on the rotating plate.

[0028] The rotating plate and connecting arm are connected by a rotary power cylinder, allowing the welding torch to adjust its pitch angle under the drive of the rotating plate. This angle adjustment function enables the welding torch to better adapt to the optimal welding angle for different welding positions of the cold water pipe, ensuring the stability of the welding process and the quality of the weld.

[0029] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0030] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0031] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ; Figure 3 This is a top view of this application; Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0032] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Frame; 2. Moving device; 3. Positioning fixture; 4. Pressing assembly; 5. Mounting base; 6. Mounting slot; 7. Clearance slot; 8. Base frame; 9. Motor; 10. Shelf; 11. Shelf plate; 12. Mounting plate; 15. Centering frame; 16. Through hole; 17. Pressing power cylinder; 18. Pressing component; 19. X-moving assembly; 20. Y-moving assembly; 21. Z-moving assembly; 22. Adapter plate assembly; 23. Connecting arm; 24. Rotating plate; 25. Welding torch; 26. Cold water pipe. Detailed Implementation

[0033] The present application will now be described in detail with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] Cold water pipe welding equipment, Example 1 as follows Figure 1 , Figure 2 As shown: The system includes a frame 1, on which a moving device 2, a positioning fixture 3, and a pressing component 4 are mounted. The positioning fixture 3 is mounted on the frame 1 and has an installation slot 6. The pressing component 4 is positioned above the positioning fixture 3. When the pressing component 4 operates, it acts on the cold water pipe 26 placed on the positioning fixture 3. The moving device 2 is connected to a welding torch 25 via an adapter plate assembly 22. The moving device 2 moves the adapter plate assembly 22 and the welding torch 25. The adapter plate assembly 22 adjusts the pitch angle of the welding torch 25, which is positioned corresponding to the installation slot 6. This design allows the welding torch 25 to flexibly reach various welding positions on the cold water pipe 26 and adjusts the welding angle according to different welding requirements, achieving efficient and flexible welding operations. It can easily handle both straight-line welding and welding of complex shapes, improving welding efficiency and the applicability of the equipment.

[0036] The positioning fixture 3 includes a mounting base 5. The top surface of the mounting base 5 has a mounting slot 6 and a clearance groove 7. The mounting slot 6 extends along its length through both sides of the mounting base 5, and its longitudinal section is V-shaped or an inverted trapezoid. When the cold water pipe 26 is placed into the mounting slot 6, regardless of its initial position, it will automatically slide towards the center position under the guidance of gravity and the shape of the slot. This ensures the accurate positioning of the cold water pipe 26 during welding, improves welding precision and quality, and reduces welding defects caused by positioning deviations.

[0037] The clearance groove 7 is perpendicular to the mounting slot 6 and extends along its length through both sides of the mounting base 5. The clearance groove 7 fully exposes the areas of the cold water pipe 26 that need to be welded, providing sufficient operating space for the welding torch 25 and ensuring that the welding process is unobstructed. Simultaneously, this structure also helps protect the non-welded parts of the cold water pipe 26 during welding, preventing weld spatter or heat from affecting other parts, thus improving welding quality and the overall performance of the cold water pipe 26.

[0038] Example 2, as Figures 1 to 4 As shown, the mounting base 5 has a disc-shaped structure and is rotatably mounted on the frame 1. The disc-shaped structure of the mounting base 5 facilitates its rotatable mounting on the frame 1, allowing the cold water pipe 26 on the mounting base 5 to rotate during the welding process. Through the rotation of the cold water pipe 26 in conjunction with the welding torch 25, the welding torch 25 can perform full-circumference welding on the cold water pipe 26 without frequently moving the position of the welding torch 25 or repositioning the cold water pipe 26, greatly improving welding efficiency. This is especially suitable for continuous welding tasks on the outer circumference of the cold water pipe 26, ensuring the uniformity and continuity of the welding.

[0039] The positioning fixture 3 includes a base frame 8, which is mounted on the frame 1. The mounting base 5 is movably mounted on the base frame 8. A motor 9 is housed within the base frame 8, and the output shaft of the motor 9 is connected to the mounting base 5. The motor 9 drives the mounting base 5 to rotate. By movably mounting the mounting base 5 on the base frame 8 and cooperating with the motor 9, the welding process of the cold water pipe 26 is automated. The motor 9 can precisely control the rotation speed and angle of the mounting base 5 to adapt to different welding speed requirements and welding processes, ensuring the stability and consistency of the welding process. Simultaneously, this design simplifies operation, reduces manual intervention, further improves welding efficiency and quality, and allows for flexible adjustment of rotation parameters according to actual welding needs.

[0040] A support frame 10 is provided on one side of the outer periphery of the mounting base 5. The support frame 10 has a horizontal L-shaped structure and includes a connecting support plate 11 and a mounting plate 12. The mounting plate 12 is connected to the mounting base 5, and the support plate 11 is horizontally positioned on one side of the mounting base 5. The design of the support frame 10 provides a support point for long cold water pipes 26. When the cold water pipe 26 is long, the support frame 10 can effectively prevent the end of the cold water pipe 26 from bending and deforming due to gravity, ensuring the shape integrity and stability of the cold water pipe 26 during the welding process. This helps to improve welding accuracy, ensure the overall quality and performance of the cold water pipe 26 after welding, and reduce welding defects and subsequent welding position deviations caused by deformation of the cold water pipe 26.

[0041] The mounting plate 12 has at least one oblong hole, the length of which is vertical. The mounting plate 12 is connected to the mounting base 5 via a fastener passing through the oblong hole. The engagement of the fastener and the oblong hole allows for height adjustment of the support frame 10. This adjustable structure can accommodate cold water pipes 26 of different diameters or heights, enhancing the versatility and flexibility of the equipment. Regardless of the size of the cold water pipe 26, stable support at its end can be ensured by simply adjusting the height of the support frame 10, further optimizing the welding environment, improving welding quality, and expanding the equipment's applicability.

[0042] A centering bracket 15 is provided on the other side of the outer circumference of the mounting base 5. The centering bracket 15 has a through hole 16, the central axis of which is parallel to the length direction of the mounting slot 6. The centering bracket 15 provides an auxiliary positioning device for the cold water pipe 26. The central axis of the through hole 16 being parallel to the length direction of the mounting slot 6 helps to pre-position the cold water pipe 26 before or during its insertion into the mounting slot 6, further improving the alignment accuracy between the cold water pipe 26 and the mounting slot 6. When welding cold water pipes 26 that require high precision, this design helps reduce the swaying and positional deviation of the cold water pipe 26, ensuring the stability of the welding process and the reliability of the welding quality.

[0043] The centering frame 15 and the mounting base 5 are vertically adjustable, with the centering frame 15 and the support frame 10 located on the extension lines on both sides of the mounting slot 6. This vertically adjustable connection allows the centering frame 15 to be flexibly adjusted in height according to actual needs. Furthermore, the fact that the centering frame 15 and the support frame 10 are located on the extension lines on both sides of the mounting slot 6 further optimizes the positioning and support process of the cold water pipe 26, improving the equipment's flexibility and adaptability to different cold water pipe 26 sizes, thus contributing to improved welding efficiency and quality.

[0044] The rest of the contents of Example 2 are the same as those of Example 1.

[0045] Example 3, as Figures 1 to 4 As shown, the pressing assembly 4 includes a pressing power cylinder 17 and a pressing member 18. The output shaft of the pressing power cylinder 17 is connected to the pressing member 18. The pressing member 18 has a cylindrical structure and is located directly above the mounting base 5. The bottom surface of the pressing member 18 has a conical structure. In this application, the pressing assembly 4 is mainly designed for a three-way cold water pipe 26. The conical bottom surface of the pressing member 18 can better fit with the upper surface of the three-way cold water pipe 26, achieving centering of the vertical pipe and thus improving the uniformity and stability of the downward pressure on the cold water pipe 26. During the welding process, this type of pressing member 18 can effectively prevent the cold water pipe 26 from displacing or vibrating due to welding heat or external force, ensuring the stability of the welding process and thus improving the welding quality.

[0046] The moving device 2 includes an X-moving component 19, a Y-moving component 20, and a Z-moving component 21. The X-moving component 19 is mounted on the frame 1, the Y-moving component 20 is mounted on the X-moving component 19, the Z-moving component 21 is mounted on the Y-moving component 20, and the adapter plate assembly 22 is mounted on the Z-moving component 21. The moving device 2 provides the welding torch 25 with the ability to move in three-dimensional space. Through the coordinated action of these three moving components, the welding torch 25 can reach the welding position on the surface of the cold water pipe 26, realizing omnidirectional and arbitrary angle welding operations on the cold water pipe 26. This highly flexible movement method can adapt to the requirements of various complex shapes and welding paths of the cold water pipe 26, greatly improving the versatility and welding range of the equipment, meeting the needs of different welding scenarios, and further enhancing the applicability and welding efficiency of the equipment.

[0047] The adapter plate assembly 22 includes a connecting arm 23 and a rotating plate 24. The connecting arm 23 is mounted on the moving device 2, and the rotating plate 24 is connected to the connecting arm 23 via a rotary power cylinder. The welding torch 25 is mounted on the rotating plate 24. The connection between the rotating plate 24 and the connecting arm 23 via the rotary power cylinder allows the welding torch 25 to adjust its pitch angle under the drive of the rotating plate 24. This angle adjustment function enables the welding torch 25 to better adapt to the optimal welding angle of the cold water pipe 26 at different welding positions, ensuring the stability of the welding process and the welding quality.

[0048] The other contents of Example 3 are the same as those of Example 1 or Example 2.

[0049] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. Cold water pipe welding equipment, characterized in that, The device includes a frame (1), on which a moving device (2), a positioning fixture (3) and a pressing component (4) are provided. The positioning fixture (3) is installed on the frame (1) and has an installation slot (6). The pressing component (4) is located above the positioning fixture (3). When the pressing component (4) is working, it acts on the cold water pipe (26) placed on the positioning fixture (3). The moving device (2) is connected to the welding torch (25) through the adapter plate assembly (22). When the moving device (2) is working, it drives the adapter plate assembly (22) and the welding torch (25) to move. When the adapter plate assembly (22) is working, it adjusts the pitch angle of the welding torch (25). The welding torch (25) is set in accordance with the installation slot (6). The positioning fixture (3) includes a mounting base (5). The top surface of the mounting base (5) is provided with a mounting slot (6) and a clearance slot (7). The mounting slot (6) extends through both sides of the mounting base (5) along its length. The longitudinal section of the mounting slot (6) is V-shaped or an inverted trapezoid. The clearance slot (7) is set perpendicular to the mounting slot (6) and extends through both sides of the mounting base (5) along its length.

2. The cold water pipe (26) welding equipment according to claim 1, characterized in that, The mounting base (5) has a disc-shaped structure and is rotatably mounted on the frame (1).

3. The cold water pipe (26) welding equipment according to claim 1, characterized in that, The positioning fixture (3) includes a base frame (8), which is set on the frame (1). The mounting seat (5) is movably mounted on the base frame (8). A motor (9) is installed inside the base frame (8). The output shaft of the motor (9) is connected to the mounting seat (5). The motor (9) drives the mounting seat (5) to rotate.

4. The cold water pipe (26) welding equipment according to claim 1, characterized in that, A shelf (10) is provided on one side of the outer periphery of the mounting base (5). The shelf (10) has a horizontal L-shaped structure. The shelf (10) includes a connecting shelf plate (11) and a mounting plate (12). The mounting plate (12) is connected to the mounting base (5). The shelf plate (11) is horizontally arranged on one side of the mounting base (5).

5. The cold water pipe (26) welding equipment according to claim 4, characterized in that, The mounting plate (12) has at least one waist-shaped hole, the length direction of which is vertical. The mounting plate (12) is connected to the mounting base (5) through a fastener that passes through the waist-shaped hole.

6. The cold water pipe (26) welding equipment according to claim 4, characterized in that, A centering frame (15) is provided on the other side of the outer peripheral surface of the mounting base (5). A through hole (16) is provided on the centering frame (15), and the central axis of the through hole (16) is parallel to the length direction of the mounting slot (6).

7. The cold water pipe (26) welding equipment according to claim 6, characterized in that, The centering frame (15) and the mounting base (5) are adjustable in height. The centering frame (15) and the shelf (10) are located on the extension lines on both sides of the mounting slot (6).

8. The cold water pipe (26) welding equipment according to claim 1, characterized in that, The pressing assembly (4) includes a pressing power cylinder (17) and a pressing component (18). The output shaft of the pressing power cylinder (17) is connected to the pressing component (18). The pressing component (18) is cylindrical in shape and is located directly above the mounting base (5). The bottom surface of the pressing component (18) is conical.

9. The cold water pipe (26) welding equipment according to claim 1, characterized in that, The mobile device (2) includes an X-moving component (19), a Y-moving component (20) and a Z-moving component (21). The X-moving component (19) is mounted on the frame (1), the Y-moving component (20) is mounted on the X-moving component (19), the Z-moving component (21) is mounted on the Y-moving component (20), and the adapter plate assembly (22) is mounted on the Z-moving component (21).

10. The cold water pipe (26) welding equipment according to claim 1, characterized in that, The adapter plate assembly (22) includes a connecting arm (23) and a rotating plate (24). The connecting arm (23) is mounted on the moving device (2). The rotating plate (24) and the connecting arm (23) are connected by a rotating power cylinder. The welding torch (25) is mounted on the rotating plate (24).

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