A steel pipe welding device

Abstract

The application relates to the field of pipeline welding equipment, in particular to a steel pipe welding device which comprises a pipe placing table and a welding frame. A plurality of bearing frames are arranged on the pipe placing table, two supporting rollers are rotationally arranged on the bearing frames, a steel pipe is placed between the two supporting rollers, a rotating assembly is arranged on the pipe placing table, the rotating assembly is used for driving the steel pipe to rotate at a constant speed, a welding plate is slidably arranged on the welding frame, an angle adjusting assembly is arranged on the welding frame and used for driving the welding plate to move in space, a welding gun, a wire feeding pipe and a camera are arranged on the welding plate, the camera is electrically connected to a control system, and a wire feeding piece is arranged on the welding frame and used for feeding welding wire into the wire feeding pipe. The application has the effects of improving the steel pipe welding efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of pipe welding equipment, and in particular to a steel pipe welding apparatus. Background Technology

[0002] As a core pipe material in the industrial field, steel pipes are widely used in building structures, petrochemicals, long-distance oil and gas pipelines, municipal engineering and other scenarios. The quality of their connection directly determines the safety and service life of the pipeline system.

[0003] Currently, based on the actual welding requirements of steel pipes, multiple pipe joints are often required to be welded in the middle and at the ends of the steel pipes. Depending on actual production needs, these pipe joints can be either straight or bent, which often results in an irregular overall shape of the welded steel pipe.

[0004] Chinese Patent No. CN220330362U discloses a steel pipe welding device, including a working platform, a welding device, and two limiting blocks; the two limiting blocks are fixedly connected to the working platform, the working platform is fixedly connected to the welding device, a second locking groove is opened through the front surface of each of the two limiting blocks, a second fixing block is fixedly connected to the front surface of each of the two limiting blocks, and a limiting structure is provided above the working platform.

[0005] The aforementioned technology can only automate the welding of straight pipes together, but it cannot weld straight pipe joints in the middle of the pipe or bends at the ends of the pipe. Therefore, pipe joints in special locations on the pipe often require manual welding. However, the quality of manual welding requires a high level of welding experience from the workers, and the quality of welding by different workers and by the same worker at different times can vary. This can easily lead to inconsistent welding quality within the same batch of pipes. Furthermore, the welding process requires workers to maintain a high level of concentration, and prolonged welding can result in excessive labor intensity, ultimately leading to low efficiency in pipe welding. These are shortcomings. Summary of the Invention

[0006] In order to improve the welding quality and efficiency of steel pipes, this application provides a steel pipe welding apparatus.

[0007] The steel pipe welding device provided in this application adopts the following technical solution: A steel pipe welding device includes a pipe placement platform and a welding frame. Multiple support frames are arranged on the pipe placement platform, and two support rollers are rotatably mounted on each support frame. A steel pipe is placed between the two support rollers. A rotating assembly is provided on the pipe placement platform to drive the steel pipe to rotate at a uniform speed. A welding plate is slidably mounted on the welding frame, and an angle-adjusting assembly is provided on the welding frame to drive the welding plate to move arbitrarily in space. A welding torch, a wire feed tube, and a camera are mounted on the welding plate. The camera is electrically connected to a control system. A wire feeder is provided on the welding frame to feed welding wire into the wire feed tube.

[0008] Optionally, the tube placement platform is provided with an adjustable slide rail, the support frame is slidably disposed on the adjustable slide rail, and a locking bolt is bolted to the support frame, the locking bolt being used to abut against the tube placement platform.

[0009] By adopting the above technical solution, workers first adjust the position of the support frame according to the size of the steel pipe, so that the steel pipe can be placed on the support roller. Then, workers fix the pipe joint to the steel pipe by spot welding. After that, the angle adjustment component adjusts the welding gun on the welding plate to align with the splice of the steel pipe and the pipe joint. Then, the rotation component drives the steel pipe to rotate at a constant speed. During this process, the camera will constantly reflect the changes in the splice position of the steel pipe and the pipe joint. At the same time, the angle adjustment component will drive the welding plate to move arbitrarily in space, so that the welding gun can always be aligned with the splice of the steel pipe and the pipe joint. The wire feeder continuously feeds welding wire into the wire feed tube, so that the pipe joint is welded to the steel pipe. This adapts to the welding conditions of different pipe joints, thereby improving the welding efficiency and quality of the steel pipe.

[0010] Optionally, the rotating assembly includes a rotary motor mounted on the tube placement platform, one of the support rollers being coaxially mounted on the output shaft of the rotary motor. A clamping frame is slidably mounted on the tube placement platform, and a clamping cylinder electrically connected to the control system is mounted on the clamping frame. A pressure plate is mounted on the piston rod of the clamping cylinder, and two pressure rollers are rotatably mounted on the pressure plate. The pressure rollers are used to press the steel pipe against the support roller.

[0011] Optionally, a rigid rubber ring is fitted onto the support roller, and the steel pipe abuts against the rigid rubber ring.

[0012] By adopting the above technical solution, the output shaft of the rotary motor drives the support roller to rotate. The hard rubber ring on the support roller drives the steel pipe to rotate under the action of friction. After multiple pipe joints are welded on the steel pipe, the rotation center of the steel pipe is offset from the axis of the steel pipe. The piston rod of the pressing cylinder extends and pushes the pressure roller on the pressure plate. The pressure roller presses the steel pipe tightly onto the hard rubber ring on the support roller. At this time, the friction between the steel pipe and the hard rubber ring increases, thereby overcoming the rotational resistance caused by the offset of the rotation center of the steel pipe. This allows the steel pipe to still rotate at a uniform speed, ultimately improving the welding quality between the steel pipe and the pipe joints.

[0013] Optionally, the angle adjustment assembly includes a longitudinal straight module, a transverse straight module, a vertical straight module, a lifting plate, and a tilting component. The lifting plate is vertically slidably mounted on the welding frame. A lifting screw is rotatably mounted on the welding frame. The lifting plate is threadedly connected to the lifting screw. A lifting motor electrically connected to the control system is mounted on the welding frame. The lifting screw is coaxially mounted on the output shaft of the lifting motor. The lifting plate is mounted on the slider of the longitudinal straight module. The transverse straight module is arranged on the longitudinal straight module. The vertical straight module is arranged on the slider of the transverse straight module. The welding plate is arranged on the slider of the vertical straight module. The tilting component is used to change the tilt angle of the welding plate.

[0014] Optionally, the tilting component includes an angle plate disposed on the longitudinal straight module, an angle motor electrically connected to the control system is disposed on the angle plate, and the transverse straight module is disposed on the output shaft of the tilt motor.

[0015] Optionally, the slider of the vertical linear module is provided with a fine-tuning plate, a fine-tuning screw is rotatably provided on the fine-tuning plate, the welding plate is threadedly connected to the fine-tuning screw, and a fine-tuning handle is coaxially provided at the end of the fine-tuning screw.

[0016] By adopting the above technical solution, the output shaft of the lifting motor drives the lifting screw to rotate, thereby causing the lifting plate to slide vertically. Under the coordinated action of the longitudinal, transverse, and vertical linear modules, the welding torch approaches the weld seam of the steel pipe and pipe joint. Finally, the worker rotates the fine-tuning screw by turning the fine-tuning handle. The rotating fine-tuning screw drives the welding plate to move, thus completing the initial position adjustment of the welding torch. During the welding process of the steel pipe and pipe joint, as the steel pipe rotates, the position of the weld seam of the steel pipe and pipe joint gradually changes. At this time, under the feedback of the camera, the longitudinal, transverse, and vertical linear modules and the tilt motor work together, so that the welding torch can change with the position of the weld seam, thereby completing the welding work of the steel pipe and pipe joint, thus improving the welding efficiency and quality.

[0017] Optionally, the wire feeding component includes an angle plate mounted on the welding frame, a mounting plate rotatably mounted on the angle plate, a wire box mounted on the mounting plate, a winding roller rotatably mounted inside the wire box, a vertical plate mounted on the mounting plate, two wire feeding wheels rotatably mounted on the vertical plate, a flexible tube between the vertical plate and the wire feeding tube, the welding wire unwound on the winding roller passes between the two wire feeding wheels and is fed into the flexible tube, and a wire feeding motor electrically connected to the control system is mounted on the vertical plate, one of the wire feeding wheels being coaxially mounted on the output shaft of the wire feeding motor.

[0018] By adopting the above technical solution, the control system starts the wire feeding motor, and the output shaft of the wire feeding motor drives the wire feeding wheel to rotate. Under the action of friction between the wire feeding wheel and the welding wire, the welding wire wound on the wire winding roller will be continuously fed to the wire feeding tube through the hose, and finally the welding wire will be continuously fed to the weld seam of the steel pipe and the pipe joint to complete the welding work.

[0019] Optionally, the rotating assembly includes a column frame mounted on the tube placement platform. The top and bottom of the column frame are each equipped with a ring-closing cylinder electrically connected to the control system. A slide block is mounted on the piston rod of the ring-closing cylinder, and the slide block is slidably mounted on the column frame. A semi-ring with an arc-shaped cross-section is rotatably mounted on the slide block, and the central angle of the semi-ring is 180°. A ring-closing bolt is bolted between the semi-rings on the two slide blocks. The interior of the semi-ring is hollow, and the wall thickness of the inner ring is less than that of the outer ring. A semi-toothed ring and a pressure valve are mounted at the end of the semi-ring. The central angle of the semi-toothed ring is 180°, and the semi-toothed ring is concentrically arranged with the semi-ring. A rotating motor electrically connected to the control system is mounted on the slide block, and a gear meshing with the semi-toothed ring is mounted on the output shaft of the rotating motor.

[0020] By adopting the above technical solution, when the steel pipe wall thickness is thin, the worker activates two closing cylinders through the control system. The piston rods of the closing cylinders extend continuously, causing the two slides to move closer together until the two half-rings abut against each other. At this point, the worker fixes the two half-rings together with closing bolts. Then, an external pressurizing device is used to pressurize the half-rings through a pressurizing valve. Because the wall thicknesses of the inner and outer rings of the half-rings are different, the sidewall of the inner ring of the half-ring will expand and deform, gradually abutting against the circumferential outer wall of the steel pipe. Finally, the control system starts the rotating motor. The output shaft of the rotating motor drives the half-tooth ring to rotate through gears. The half-tooth ring drives the two half-rings to rotate around the axis of the steel pipe, thereby reducing the possibility of deformation of the steel pipe during clamping and improving the welding quality of thin-walled steel pipes.

[0021] In summary, this application includes at least one of the following beneficial technical effects: Workers first adjust the position of the support frame according to the size of the steel pipe to facilitate the placement of the steel pipe on the support roller. Then, workers fix the pipe joint to the steel pipe by spot welding. After that, the angle adjustment component adjusts the welding gun on the welding plate to align with the splice of the steel pipe and the pipe joint. Then, the rotation component drives the steel pipe to rotate at a constant speed. During this process, the camera will constantly reflect the changes in the splice position of the steel pipe and the pipe joint. At the same time, the angle adjustment component will drive the welding plate to move arbitrarily in space, so that the welding gun can always be aligned with the splice of the steel pipe and the pipe joint. The wire feeder continuously feeds welding wire into the wire feed tube, so that the pipe joint is welded to the steel pipe. This adapts to the welding conditions of different pipe joints, thereby improving the welding efficiency and quality of the steel pipe. During the welding process of steel pipe and pipe joint, as the steel pipe rotates, the position of the weld seam between the steel pipe and the pipe joint gradually changes. At this time, under the feedback of the camera, the longitudinal linear module, the transverse linear module, the vertical linear module and the tilt motor work together, so that the welding torch can change with the position of the weld seam, thereby completing the welding work of steel pipe and pipe joint, thus improving the welding efficiency and quality. When the steel pipe has a thin wall thickness, the worker activates two closing cylinders through the control system. The piston rods of the closing cylinders extend continuously, causing the two slides to move closer together until the two half-rings abut against each other. At this point, the worker fixes the two half-rings together with closing bolts. Then, an external pressurizing device is used to pressurize the half-rings through a pressurizing valve. Because the wall thicknesses of the inner and outer rings of the half-rings are different, the side wall of the inner ring of the half-ring will expand and deform, gradually abutting against the circumferential outer wall of the steel pipe. Finally, the control system starts the rotating motor. The output shaft of the rotating motor drives the half-tooth ring to rotate through gears. The half-tooth ring drives the two half-rings to rotate around the axis of the steel pipe, thereby reducing the possibility of deformation of the steel pipe during clamping and improving the welding quality of thin-walled steel pipes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0023] Figure 2 This is a structural schematic diagram of Embodiment 1 of this application, used to illustrate the positional relationship between the welding plate, wire box, and welding torch.

[0024] Figure 3 This is a structural schematic diagram in Embodiment 2 of this application used to illustrate the positional relationship between the semi-ring, the rotating motor, and the steel pipe.

[0025] Figure 4 This is a structural schematic diagram of Embodiment 2 of this application, used to illustrate the positional relationship between the gear, the rotating motor, and the semi-gear ring.

[0026] Explanation of reference numerals in the attached drawings: 1. Steel pipe; 2. Pipe placement platform; 3. Welding frame; 4. Bearing frame; 5. Support roller; 6. Rotating assembly; 601. Rotary motor; 602. Clamping frame; 603. Clamping cylinder; 604. Pressure plate; 605. Pressure roller; 606. Column frame; 607. Ring-closing cylinder; 608. Slide seat; 609. Half ring; 610. Ring-closing bolt; 611. Half-tooth ring; 612. Pressure valve; 613. Rotating motor; 614. Gear; 7. Welding plate; 8. Angle adjustment assembly; 81. Longitudinal straight module; 82. Transverse straight module; 83. 84. Vertical linear module; 85. Lifting plate; 86. Tilt component; 87. Tilt motor; 88. Lifting screw; 89. Lifting motor; 10. Welding torch; 11. Wire feeding tube; 12. Camera; 13. Wire feeding component; 14. Angle plate; 15. Mounting plate; 16. Wire box; 17. Wire winding roller; 18. Vertical plate; 19. Wire feeding wheel; 10. Flexible hose; 10. Wire feeding motor; 11. Adjustable slide rail; 12. Locking bolt; 13. Hard rubber ring; 14. Fine adjustment plate; 15. Fine adjustment screw; 16. Fine adjustment handle. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail. Example

[0028] This application discloses a steel pipe welding apparatus.

[0029] Reference Figure 1 and Figure 2 A steel pipe welding device includes a pipe placement platform 2 and a welding frame 3. Multiple support frames 4 are arranged on the pipe placement platform 2. An adjustable slide rail 13 is bolted to the pipe placement platform 2. The support frames 4 are slidably arranged on the adjustable slide rail 13. Locking bolts 14 are bolted to the support frames 4. The locking bolts 14 are used to abut against the pipe placement platform 2.

[0030] Reference Figure 1 and Figure 2 Two support rollers 5 are rotatably connected to the support frame 4. A hard rubber ring 15 is sleeved on the support roller 5 and is bonded to the support roller 5. The steel pipe 1 is placed between the two support rollers 5 and abuts against the hard rubber ring 15. A rotating component 6 is arranged on the pipe placement platform 2. The rotating component 6 is used to drive the steel pipe 1 to rotate at a uniform speed.

[0031] Reference Figure 1 and Figure 2 The rotating assembly 6 includes a rotary motor 601 bolted to the tube placement platform 2, and a support roller 5 coaxially bolted to the output shaft of the rotary motor 601. A clamping frame 602 is horizontally slidably arranged on the tube placement platform 2, and the clamping frame 602 is fixed to the tube placement platform 2 by bolts.

[0032] Reference Figure 1 and Figure 2 A pressing cylinder 603, which is electrically connected to the control system, is bolted to the pressing frame 602. A pressure plate 604 is bolted to the piston rod of the pressing cylinder 603. Two pressure rollers 605 are rotatably connected to the pressure plate 604. The axis of the pressure rollers 605 is parallel to the axis of the support roller 5. The pressure rollers 605 are used to press the steel pipe 1 onto the support roller 5.

[0033] First, the worker adjusts the position of the support frame 4 according to the size of the steel pipe 1 and the installation position of the pipe joint. Then, the worker places the steel pipe 1 on the hard rubber ring 15 between the two support rollers 5. Subsequently, the control system starts the clamping cylinder 603, and the piston rod of the clamping cylinder 603 extends, so that the pressure roller 605 on the pressure plate 604 abuts against the steel pipe 1. At this time, the steel pipe 1 is pressed tightly on the hard rubber ring 15 on the support roller 5. Then, the worker fixes the pipe joint to the steel pipe 1 by spot welding.

[0034] Reference Figure 1 and Figure 2 A welding plate 7 is slidably arranged on the welding frame 3. A welding gun 9, a wire feed tube 10 and a camera 11 are bolted to the welding plate 7. The camera 11 is electrically connected to the control system. An angle adjustment component 8 is arranged on the welding frame 3 to drive the welding plate 7 to move arbitrarily in space.

[0035] Reference Figure 1 and Figure 2 The angle adjustment component 8 includes a longitudinal straight module 81, a transverse straight module 82, a vertical straight module 83, a lifting plate 84, and a tilting component 85. The tilting component 85 is used to change the tilt angle of the welding plate 7. The longitudinal straight module 81, the transverse straight module 82, and the vertical straight module 83 can all adopt ball screw type straight modules in the prior art.

[0036] Reference Figure 1 and Figure 2 The lifting plate 84 is vertically slidably arranged on the welding frame 3. A vertical lifting screw 86 is rotatably connected to the welding frame 3. The lifting plate 84 is threadedly connected to the lifting screw 86. A lifting motor 87 electrically connected to the control system is bolted to the welding frame 3. The lifting screw 86 is coaxially bolted to the output shaft of the lifting motor 87. The lifting plate 84 is bolted to the slider of the longitudinal linear module 81.

[0037] Reference Figure 1 and Figure 2 A horizontal linear module 82 is arranged on a vertical linear module 81. A vertical linear module 83 is bolted to a slider of the horizontal linear module 82. A fine-tuning plate 16 is bolted to the slider of the vertical linear module 83. A fine-tuning screw 17 is rotatably connected to the fine-tuning plate 16. A welding plate 7 is threaded onto the fine-tuning screw 17. A fine-tuning handle 18 is coaxially bolted to the end of the fine-tuning screw 17.

[0038] Reference Figure 1 and Figure 2 The tilting component 85 includes an angle plate 851 bolted to the longitudinal straight module 81, a tilting motor 852 electrically connected to the control system bolted to the angle plate 851, and a transverse straight module 82 bolted to the output shaft of the tilting motor 852.

[0039] The worker starts the lifting motor 87 through the control system. The output shaft of the lifting motor 87 drives the lifting screw 86 to rotate, thereby causing the lifting plate 84 to slide in the vertical direction. Under the coordinated action of the longitudinal linear module 81, the transverse linear module 82, and the vertical linear module 83, the welding gun 9 on the welding plate 7 is brought close to the weld between the steel pipe 1 and the pipe joint.

[0040] Afterwards, the worker turns the fine adjustment handle 18 to rotate the fine adjustment screw 17. The rotating fine adjustment screw 17 drives the welding plate 7 to move, so that the welding torch 9 is aligned with the weld between the steel pipe 1 and the pipe joint. The control system starts the rotary motor 601. The output shaft of the rotary motor 601 drives the support roller 5 to rotate. The rotating support roller 5 rotates the steel pipe 1 evenly through the friction between the hard rubber ring 15 and the steel pipe 1.

[0041] Since the position of the weld between the steel pipe 1 and the pipe joint is constantly changing, under the real-time feedback of the camera 11, the longitudinal linear module 81, the transverse linear module 82, the vertical linear module 83 and the tilt motor 852 will work together to make the welding gun 9 on the welding plate 7 change with the position of the weld. During this process, the distance between the welding gun 9 and the weld remains constant.

[0042] Reference Figure 1 and Figure 2 The welding frame 3 is equipped with a wire feeder 12, which is used to feed welding wire into the wire feeding tube 10.

[0043] Reference Figure 1 and Figure 2 The wire feeding component 12 includes an angle plate 121 bolted to the welding frame 3, a mounting plate 122 rotatably connected to the angle plate 121, a wire box 123 bolted to the mounting plate 122, a wire winding roller 124 rotatably connected inside the wire box 123, a vertical plate 125 bolted to the mounting plate 122, and two wire feeding wheels 126 rotatably connected to the vertical plate 125. The circumferential surface of the wire feeding wheels 126 is rough.

[0044] Reference Figure 1 and Figure 2A flexible hose 127 is bolted between the upright plate 125 and the wire feeding tube 10. The welding wire unwound on the winding roller 124 passes through the two wire feeding wheels 126 and is fed into the flexible hose 127. A wire feeding motor 128 electrically connected to the control system is bolted to the upright plate 125. One of the wire feeding wheels 126 is coaxially bolted to the output shaft of the wire feeding motor 128.

[0045] During the rotation of the steel pipe 1, the control system starts the wire feeding motor 128. The output shaft of the wire feeding motor 128 drives the wire feeding wheel 126 to rotate. Under the action of the friction of the two wire feeding wheels 126, the welding wire unwound on the wire winding roller 124 is fed into the hose 127 at a fixed conveying speed, thereby ensuring that the wire feeding tube 10 stably feeds the welding wire to the weld between the steel pipe 1 and the pipe joint. This ensures the quality and efficiency of the welding between the steel pipe 1 and the pipe joint.

[0046] The implementation principle of Example 1 is as follows: The worker first adjusts the position of the support frame 4 according to the size of the steel pipe 1 and the installation position of the pipe joint. Then, the worker places the steel pipe 1 on the hard rubber ring 15 between the two support rollers 5. Subsequently, the control system starts the clamping cylinder 603. The piston rod of the clamping cylinder 603 extends, so that the pressure roller 605 on the pressure plate 604 abuts against the steel pipe 1. At this time, the steel pipe 1 is pressed tightly on the hard rubber ring 15 on the support roller 5. Then, the worker fixes the pipe joint to the steel pipe 1 by spot welding.

[0047] The worker starts the lifting motor 87 through the control system. The output shaft of the lifting motor 87 drives the lifting screw 86 to rotate, thereby causing the lifting plate 84 to slide in the vertical direction. Under the coordinated action of the longitudinal linear module 81, the transverse linear module 82, and the vertical linear module 83, the welding gun 9 on the welding plate 7 is brought close to the weld between the steel pipe 1 and the pipe joint.

[0048] Afterwards, the worker turns the fine adjustment handle 18 to rotate the fine adjustment screw 17. The rotating fine adjustment screw 17 drives the welding plate 7 to move, so that the welding torch 9 is aligned with the weld between the steel pipe 1 and the pipe joint. The control system starts the rotary motor 601. The output shaft of the rotary motor 601 drives the support roller 5 to rotate. The rotating support roller 5 rotates the steel pipe 1 evenly through the friction between the hard rubber ring 15 and the steel pipe 1.

[0049] Since the position of the weld between the steel pipe 1 and the pipe joint is constantly changing, under the real-time feedback of the camera 11, the longitudinal linear module 81, the transverse linear module 82, the vertical linear module 83 and the tilt motor 852 will work together to make the welding gun 9 on the welding plate 7 change with the position of the weld. During this process, the distance between the welding gun 9 and the weld remains constant.

[0050] During the rotation of the steel pipe 1, the control system starts the wire feeding motor 128. The output shaft of the wire feeding motor 128 drives the wire feeding wheel 126 to rotate. Under the action of the friction of the two wire feeding wheels 126, the welding wire unwound on the wire winding roller 124 is fed into the hose 127 at a fixed conveying speed, thereby ensuring that the wire feeding tube 10 stably feeds the welding wire to the weld between the steel pipe 1 and the pipe joint. This ensures the quality and efficiency of the welding between the steel pipe 1 and the pipe joint. Example

[0051] refer to Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that the rotating assembly 6 includes a column frame 606 bolted to the tube placement platform 2. The top and bottom of the column frame 606 are bolted with a ring-closing cylinder 607 electrically connected to the control system. A slide block 608 is bolted to the piston rod of the ring-closing cylinder 607, and the slide block 608 is slidably arranged on the column frame 606.

[0052] refer to Figure 3 and Figure 4 A semi-ring 609 with an arc-shaped cross-section is rotatably connected to the slide 608. The central angle of the semi-ring 609 is 180°. A ring bolt 610 is bolted between the semi-rings 609 on the two slides 608. The interior of the semi-ring 609 is hollow and the wall thickness of the inner ring is less than that of the outer ring.

[0053] refer to Figure 3 and Figure 4 The end of the semi-ring 609 is bolted with a semi-tooth ring 611 and a pressure valve 612. The central angle of the semi-tooth ring 611 is 180°. The semi-tooth ring 611 and the semi-ring 609 are arranged concentrically. A rotary motor 613 electrically connected to the control system is bolted to the slide 608. A gear 614 that meshes with the semi-tooth ring 611 is bolted to the output shaft of the rotary motor 613.

[0054] The implementation principle of Example 2 is as follows: When the wall thickness of steel pipe 1 is relatively thin, and after steel pipe 1 is placed on support roller 5, the worker starts two ring-closing cylinders 607 respectively through the control system. The piston rod of the ring-closing cylinder 607 extends continuously, thereby causing the two slide blocks 608 to move closer and closer until the two half rings 609 abut against each other. At this time, the worker fixes the two half rings 609 together with the ring-closing bolt 610.

[0055] Subsequently, an external pressurizing device is used to pressurize the inside of the semi-ring 609 through the pressurizing valve 612. Since the wall thickness of the inner and outer rings of the semi-ring 609 is different, and the inner ring of the semi-ring 609 is thinner, the side wall of the inner ring of the semi-ring 609 will gradually expand and deform and eventually abut against the circumferential outer wall of the steel pipe 1, thereby completing the clamping and fixing of the steel pipe 1. Since the circumferential surface of the steel pipe 1 is pressurized synchronously, it will not cause deformation at the weld between the steel pipe 1 and the pipe joint.

[0056] Finally, the control system starts the rotating motor 613. The output shaft of the rotating motor 613 drives the half-tooth ring 611 to rotate through the gear 614. The half-tooth ring 611 will drive the two half-rings 609 to rotate at a constant speed around the axis of the steel pipe 1, thereby completing the welding work of the thin-walled steel pipe 1. After the welding is completed, the closing ring bolt 610 is removed, and the piston rod of the closing ring cylinder 607 is started to reset.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel pipe welding device, characterized in that: The device includes a tube placement platform (2) and a welding frame (3). The tube placement platform (2) is equipped with multiple support frames (4). Two support rollers (5) are rotatably mounted on the support frames (4). The steel pipe (1) is placed between the two support rollers (5). The tube placement platform (2) is equipped with a rotating component (6) for driving the steel pipe (1) to rotate at a constant speed. The welding frame (3) is equipped with a welding plate (7) for sliding. The welding frame (3) is equipped with an angle adjustment component (8) for driving the welding plate (7) to move arbitrarily in space. The welding plate (7) is equipped with a welding gun (9), a wire feeding tube (10), and a camera (11). The camera (11) is electrically connected to the control system. The welding frame (3) is equipped with a wire feeding component (12) for feeding welding wire into the wire feeding tube (10).

2. The steel pipe welding device according to claim 1, characterized in that: The tube placement platform (2) is provided with an adjustable slide rail (13), the support frame (4) is slidably disposed on the adjustable slide rail (13), and a locking bolt (14) is bolted on the support frame (4), the locking bolt (14) being used to abut against the tube placement platform (2).

3. The steel pipe welding device according to claim 2, characterized in that: The rotating assembly (6) includes a rotary motor (601) mounted on the tube placement platform (2), one of the support rollers (5) being coaxially mounted on the output shaft of the rotary motor (601). A clamping frame (602) is slidably mounted on the tube placement platform (2), and a clamping cylinder (603) electrically connected to the control system is mounted on the clamping frame (602). A pressure plate (604) is mounted on the piston rod of the clamping cylinder (603), and two pressure rollers (605) are rotatably mounted on the pressure plate (604). The pressure rollers (605) are used to press the steel pipe (1) onto the support roller (5).

4. The steel pipe welding device according to claim 3, characterized in that: A hard rubber ring (15) is fitted on the support roller (5), and the steel pipe (1) abuts against the hard rubber ring (15).

5. A steel pipe welding device according to claim 1, characterized in that: The angle adjustment component (8) includes a longitudinal straight module (81), a transverse straight module (82), a vertical straight module (83), a lifting plate (84), and an angle adjustment component (85). The lifting plate (84) is vertically slidably mounted on the welding frame (3). A lifting screw (86) is rotatably mounted on the welding frame (3). The lifting plate (84) is threadedly connected to the lifting screw (86). A lifting motor (87) electrically connected to the control system is mounted on the welding frame (3). The screw (86) is coaxially mounted on the output shaft of the lifting motor (87), the lifting plate (84) is mounted on the slider of the longitudinal linear module (81), the transverse linear module (82) is arranged on the longitudinal linear module (81), the vertical linear module (83) is arranged on the slider of the transverse linear module (82), the welding plate (7) is arranged on the slider of the vertical linear module (83), and the tilting member (85) is used to change the tilt angle of the welding plate (7).

6. The steel pipe welding device according to claim 5, characterized in that: The tilting component (85) includes an angle plate (851) disposed on the longitudinal straight module (81), and a tilting motor (852) electrically connected to the control system is disposed on the angle plate (851). The transverse straight module (82) is disposed on the output shaft of the tilting motor (852).

7. A steel pipe welding device according to claim 6, characterized in that: The vertical linear module (83) has a fine-tuning plate (16) on its slider, and a fine-tuning screw (17) is rotatably mounted on the fine-tuning plate (16). The welding plate (7) is threaded onto the fine-tuning screw (17), and a fine-tuning handle (18) is coaxially mounted at the end of the fine-tuning screw (17).

8. The steel pipe welding device according to claim 1, characterized in that: The wire feeding component (12) includes an angle plate (121) disposed on the welding frame (3), an mounting plate (122) rotatably disposed on the angle plate (121), a wire box (123) disposed on the mounting plate (122), a winding roller (124) rotatably disposed inside the wire box (123), a vertical plate (125) disposed on the mounting plate (122), two wire feeding wheels (126) rotatably disposed on the vertical plate (125), a flexible hose (127) disposed between the vertical plate (125) and the wire feeding tube (10), the welding wire unwound on the winding roller (124) passes through the two wire feeding wheels (126) and is fed into the flexible hose (127), and a wire feeding motor (128) electrically connected to the control system is disposed on the vertical plate (125), one of the wire feeding wheels (126) being coaxially disposed on the output shaft of the wire feeding motor (128).

9. A steel pipe welding device according to claim 2, characterized in that: The rotating assembly (6) includes a column frame (606) mounted on the tube placement platform (2). Both the top and bottom of the column frame (606) are equipped with a ring-closing cylinder (607) electrically connected to the control system. A slide block (608) is mounted on the piston rod of the ring-closing cylinder (607). The slide block (608) is slidably mounted on the column frame (606). A semi-ring (609) with an arc-shaped cross-section is rotatably mounted on the slide block (608). The central angle of the semi-ring (609) is 180°. The semi-rings (609) on the two slide blocks (608) are... A ring bolt (610) is bolted between them. The interior of the half ring (609) is hollow and the wall thickness of the inner ring is less than that of the outer ring. A half toothed ring (611) and a pressure valve (612) are provided at the end of the half ring (609). The central angle of the half toothed ring (611) is 180°. The half toothed ring (611) and the half ring (609) are arranged concentrically. A rotary motor (613) electrically connected to the control system is provided on the slide (608). A gear (614) that meshes with the half toothed ring (611) is provided on the output shaft of the rotary motor (613).

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