Welding device for steel pipe machining and manufacturing

Abstract

The invention discloses a welding device for processing and manufacturing a steel pipe, which comprises a base, a spiral steel pipe piece movably erected above the base through a rotating unit, and a long cantilever sliding rail transversely sliding on one side of the base through a tackle, an end supporting table is arranged at the position, close to the long cantilever sliding rail, of one side of the base in a sliding mode and used for supporting the end of the long cantilever sliding rail, and a sliding table containing frame is arranged above the long cantilever sliding rail and transversely slides at the cantilever position above the long cantilever sliding rail through driving of a back advancing mechanism. One side of the sliding table placement frame is movably connected with the laser welding device through an adjusting mechanism, the adjusting mechanism comprises a servo motor and an electric push rod, and the servo motor is used for controlling the distance between the bottom detection welding position of the laser welding device and a seam; the device can adapt to different operation spaces by controlling the laser welding device and the electromagnetic plate, and meanwhile, under the electromagnetic conduction state, the pipe fitting jumping phenomenon is reduced, and the linear deflection condition of the long cantilever can be synchronously reduced.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting re-welding technology, and in particular to a welding device for steel pipe processing and fabrication. Background Technology

[0002] Spiral steel pipes are typically made from hot-rolled strip steel coils, which are continuously formed and welded on a pipe-making unit. The production line generally includes an uncoiling and feeding device, a leveling / flattening roller group, and a pinch roller group, which are used to stably feed the strip steel into the forming area. After being guided, the strip steel enters the forming machine at a certain spiral angle and is rolled into a cylindrical shape by a series of rollers such as pre-bending rollers, forming rollers, and sizing rollers. It then rotates and moves forward continuously on the roller frame / support rollers. The spiral weld seam area to be joined is usually equipped with internal and external welding devices, commonly submerged arc welding. The welding wire enters the welding gun through the wire feeding mechanism, and the flux is conveyed by the hopper to cover the weld seam. The welding gun moves along the weld seam trajectory with the trolley or cross arm to achieve internal welding, external welding, or multi-pass welding. After the pipe is formed, it can be combined with processes such as cutting, straightening and length setting, diameter expansion, non-destructive testing, hydrostatic testing, and anti-corrosion coating to form long-distance, large-diameter pipes for oil and gas transportation, municipal water supply and drainage, pile foundations, and structural engineering.

[0003] Currently, in the subsequent quality inspection and repair of spiral welded steel pipes, it is often necessary to carry out defect detection and repair welding operations on the spiral joint area inside the pipe. There are two main types of automated implementation paths commonly used in engineering applications: First, a pipe-walking welding / inspection robot is used to move autonomously along the axial direction inside the pipe and coordinate with the rotation of the steel pipe to achieve continuous tracking inspection and repair welding of the spiral weld. Second, a long cantilever extension mechanism is used to send the welding and inspection unit into the pipe. The unit is guided along the cantilever and fed at an almost constant speed, while cooperating with the rotation of the steel pipe to complete the continuous inspection and repair of the spiral weld.

[0004] In both of the above-mentioned solutions, the in-pipe walking robot typically suffers from high system cost and mechanical coupling constraints: while rotating circumferentially with the pipe, it also needs to complete axial feeding. The normal clamping and rolling / sliding contact between the support wheels and the pipe wall easily introduces large frictional damping and disturbance excitation. On this basis, when the weld scar of the external weld of the pipe comes into contact with the support component, the pipe itself will experience a slight jump, which will lead to inertial attitude sway and vibration at the welding / inspection end during the movement, affecting the weld tracking stability and the continuous repair welding quality. In contrast, when the welding / inspection unit moves along the cantilever, the cantilever structure is prone to deflection accumulation and local bending due to factors such as self-weight and heat effects, resulting in a deviation between the actual spatial position of the weld and the inspection / repair welding trajectory. When the length of the pipe increases, this deviation is more easily amplified, thereby reducing the applicability and consistency of inspection, repair welding and rework of the inner wall joints of long pipes.

[0005] Therefore, how to provide a welding device for steel pipe processing and manufacturing is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] One objective of this invention is to provide a welding device for steel pipe processing and manufacturing. This invention can be adapted to different working spaces by controlling the laser welding device and the electromagnetic plate. At the same time, in the electromagnetic conduction state, it can not only reduce the pipe jumping phenomenon, but also simultaneously reduce the linear deflection of long cantilever.

[0007] According to an embodiment of the present invention, a welding device for steel pipe processing includes a base, a spiral steel pipe component movably mounted above the base via a rotating unit, and a long cantilever slide rail that slides laterally on one side of the base via a trolley. An end support platform is slidably provided on one side of the base near the long cantilever slide rail to support the end of the long cantilever slide rail. A slide table mounting frame is provided above the long cantilever slide rail. The slide table mounting frame slides laterally at a cantilever position above the long cantilever slide rail via a back travel mechanism. A laser welding device is movably connected to one side of the slide table mounting frame via an adjustment mechanism. The adjustment mechanism includes a servo motor and an electric push rod. The servo motor is used to control the distance between the bottom detection welding position and the joint of the laser welding device.

[0008] An electromagnetic plate is synchronously connected to the top of the slide table mounting frame near the axis of the spiral steel pipe through a servo motor. The servo motor is used to control the relative distance between the electromagnetic plate and the top of the inner surface of the spiral steel pipe. When the electromagnetic plate is energized, it can generate a magnetic attraction to the spiral steel pipe. The laser welding device, the electromagnetic plate, and the traveling mechanism are all electrically connected to the signal processing control unit fixed on the top of the slide table mounting frame through a guide cable.

[0009] Furthermore, the adjustment mechanism also includes a clutch assembly and two sets of transmission assemblies. The clutch assembly includes a ring rod and a splined sleeve wheel. The splined sleeve wheel is slidably connected to the surface of the spline rod. The bottom of the spline rod is fixed to the output shaft of the servo motor. The outer side of the splined sleeve wheel is rotatably sleeved with the ring rod through pressure balls. One side of the ring rod is fixed to the output end of the electric push rod. The electric push rod and the servo motor are both fixed on the slide table mounting frame.

[0010] Furthermore, the transmission assembly includes a main tooth and an external convex connecting ring. The main tooth sequentially meshes with the transmission tooth and the auxiliary tooth on one side, and the main tooth is limited to rotate on the slide mounting frame by the external convex connecting ring.

[0011] Furthermore, the main teeth in the two sets of transmission components are mounted opposite each other on the spline rod, the spline rod passes through the middle opening of the main teeth and the outer wall does not contact the inner wall of the main teeth, and the two sets of auxiliary teeth are respectively fixedly connected to the lower lead screw and the threaded cylinder.

[0012] Furthermore, rubber ring protrusions are fixedly connected to the end faces of the two sets of main teeth near the splined sleeve, and the end face of the splined sleeve and the rubber ring protrusions are in elastic material contact.

[0013] Furthermore, the upper and lower ends of the lower lead screw are limited to rotate under the slide table mounting frame by the bracket. The nut seat is fixedly connected to one side of the laser welding device. The nut seat is threaded to the surface of the lower lead screw. The middle part of the threaded cylinder is limited to rotate inside the slide table mounting frame by the convex ring shaft. The threaded cylinder is through the upper and lower parts and is internally threaded to the upper lead screw. The electromagnetic plate is fixed to the top of the upper lead screw. One side of the electromagnetic plate slides on the surface of the slide table mounting frame through the limiting rod.

[0014] Furthermore, the traveling mechanism includes a stepper motor and traveling wheels. The output shaft of the stepper motor is connected to two sets of traveling wheels through a gear set. The two sets of traveling wheels contact the long cantilever slide rail, providing the slide table mounting frame with the ability to move laterally on the surface of the long cantilever slide rail.

[0015] Furthermore, the rotating unit includes a bottom support roller, a multi-angle loading frame, and two sets of auxiliary support groups. The multi-angle loading frame is movably mounted in the middle of the bottom support roller and is rotatably mounted above the triangular platform. The triangular platform is fixed to the base. Drive rollers are rotatably mounted on both sides of the multi-angle loading frame near the top of the bottom support roller via shafts.

[0016] Furthermore, the two sets of drive rollers are connected to the motor via a geared assembly at their adjacent midpoints. The auxiliary support group is located at both ends of the bottom support roller. Both the polygonal loading frame and the auxiliary support group drive the bottom support roller to swing around the pivot point of the polygonal loading frame and the triangular platform via hydraulic rods.

[0017] The beneficial effects of this invention are:

[0018] This invention, by installing an electromagnetic plate above the slide platform mounting frame, activates the electromagnetic plate under the control of the signal processing and control unit when the laser welding device on the surface of the slide platform mounting frame slides on the long cantilever slide rail driven by the traveling mechanism. This electromagnetic plate attracts the spiral steel pipe above, effectively providing a downward pull effect to the spiral steel pipe, allowing it to better press against the bottom support roller and drive roller. As the spiral steel pipe rotates driven by the drive roller, the contact between the weld scar on the outside of the spiral steel pipe and the bottom support roller causes local deformation, thereby reducing the occurrence of axial runout of the spiral steel pipe. Compared with the prior art, this invention completely eliminates the use of the external upper pressing component of the spiral steel pipe, effectively reducing the cost and simplifying equipment maintenance.

[0019] This invention installs an electromagnetic plate above the slide platform mounting frame. When the electromagnetic plate is energized, in addition to pulling down the spiral steel pipe, the electromagnetic plate itself can directly drive the entire slide platform mounting frame to generate a synchronous counterforce through the connecting parts. This maximizes the overcoming of the influence of the gravity of the slide platform mounting frame and the laser welding device on the long cantilever slide rail, thereby significantly reducing the problem of the long cantilever slide rail itself bending and deforming when the slide platform mounting frame slides to the middle or end of the long cantilever slide rail, which exists in the prior art. This ensures the connection effect between the laser welding device and the inner joint of the spiral steel pipe.

[0020] This invention, through its transmission and clutch components, and driven by a servo motor and an electric push rod, can separately control the up-and-down sliding operation of the laser welding device and the electromagnetic plate on the slide table mounting frame. This allows for height adjustment when dealing with spiral steel pipe fittings of different sizes, ensuring that the electromagnetic plate can effectively adhere to the upper area of ​​the inner wall of the spiral steel pipe fitting, while the laser welding device can better adapt to the insertion operation of pipe fittings with different diameters. Compared with existing technologies, this invention improves the operational flexibility of the equipment and can also compensate for the distance of the laser welding device based on actual vibration and deformation. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a welding device for steel pipe processing and fabrication proposed in this invention.

[0023] Figure 2 This is a side view of the overall structure of a welding device for steel pipe processing and manufacturing proposed in this invention, showing the stress distribution.

[0024] Figure 3 This is a schematic diagram of the rotating unit structure of a welding device for steel pipe processing and manufacturing proposed in this invention.

[0025] Figure 4 This is a schematic diagram of the sliding table mounting frame for a welding device used in steel pipe processing and manufacturing, as proposed in this invention.

[0026] Figure 5 This is a schematic diagram of the front structure connection of a laser welding device for steel pipe processing and manufacturing, as proposed in this invention.

[0027] Figure 6 This is a partial structural diagram of the adjustment mechanism of a welding device for steel pipe processing and manufacturing proposed in this invention.

[0028] Figure 7This is a partial cross-sectional schematic diagram of the adjustment mechanism of a welding device for steel pipe processing and manufacturing proposed in this invention.

[0029] Figure 8 This is a schematic diagram showing the disassembly of a sliding table mounting frame structure for a welding device used in steel pipe processing and fabrication, as proposed in this invention.

[0030] Figure 9 This invention proposes a welding device for steel pipe processing and fabrication. Figure 7 Enlarged schematic diagram of the structure at point A.

[0031] In the diagram: 1. Base; 2. Rotating unit; 3. Spiral steel pipe fitting; 4. End support platform; 5. Long cantilever slide rail; 6. Slide table mounting frame; 7. Laser welding device; 8. Electromagnetic plate; 9. Adjustment mechanism; 10. Signal processing and control unit; 11. Traveling mechanism;

[0032] 21. Bottom support roller; 22. Multi-angle loading frame; 23. Hydraulic rod; 24. Drive roller; 25. Triangular table; 26. Gear drive assembly; 27. Secondary support assembly; 91. Servo motor; 92. Electric push rod; 93. Transmission assembly; 94. Clutch assembly; 95. Lower lead screw; 96. Nut seat; 97. Threaded cylinder; 98. Upper lead screw;

[0033] 931. Main gear; 932. Outer convex connecting ring; 933. Transmission gear; 934. Secondary gear; 941. Ring rod; 942. Splined sleeve wheel; 943. Splined rod; 944. Rubber ring protrusion;

[0034] 111. Stepper motor; 112. Traveling wheel. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0036] refer to Figures 1-9The system includes a base 1, a spiral steel pipe 3 movably mounted above the base 1 via a rotating unit 2, and a long cantilever slide rail 5 slid laterally on one side of the base 1 via a trolley. The rotating unit 2 is used to movably mount the spiral steel pipe 3 relative to the base 1, so that the spiral steel pipe 3 is in a processable installation state above the base 1. The long cantilever slide rail 5 is set on one side of the base 1 in a trolley manner, so that the long cantilever slide rail 5 can be displaced in the lateral direction relative to the base 1 to adapt to the operation requirements of different positions. An end support platform 4 is slidably set on one side of the base 1 near the long cantilever slide rail 5 to support the end of the long cantilever slide rail 5. That is, the end support platform 4 is slidably set on one side of the base 1 and forms a support for the end of the long cantilever slide rail 5 near the long cantilever slide rail 5, so that the end of the long cantilever slide rail 5 has a support reference when the cantilever is extended, reducing the tendency of the end of the long cantilever slide rail 5 to deflect or swing.

[0037] A slide table mounting frame 6 is installed above the long cantilever slide rail 5. The slide table mounting frame 6 is arranged in the area above the long cantilever slide rail 5 and forms a corresponding installation relationship with the cantilever structure of the long cantilever slide rail 5. The slide table mounting frame 6 is driven by the back travel mechanism 11 to slide laterally at the cantilever position above the long cantilever slide rail 5. The travel mechanism 11 is located on the back of the slide table mounting frame 6 and forms a driving relationship with the slide table mounting frame 6, so that the slide table mounting frame 6 can slide laterally along the cantilever direction of the long cantilever slide rail 5 under the action of the travel mechanism 11. This allows the slide table mounting frame 6 to change its position above the long cantilever slide rail 5 to move closer to or further away from different processing areas of the spiral steel pipe fitting 3. One side of the slide table mounting frame 6 is movably connected to the laser through the adjustment mechanism 9. The welding device 7, i.e., the laser welding device 7, is movably connected to one side of the slide table mounting frame 6 via the adjustment mechanism 9. This provides the laser welding device 7 with an assembly basis for position adjustment or posture coordination relative to the slide table mounting frame 6. The adjustment mechanism 9 includes a servo motor 91 and an electric push rod 92, which are jointly housed within the adjustment mechanism 9 to form an adjustment basis for the relevant positions of the laser welding device 7. The servo motor 91 controls the distance between the bottom detection welding position of the laser welding device 7 and the joint. This ensures that the bottom detection welding position of the laser welding device 7 maintains the required spacing relative to the joint during operation, adapting to the operational needs of different pipe diameters or different weld conditions. An electromagnetic plate 8 is synchronously connected to the top of the mounting frame 6, near the area directly above the axis of the spiral steel pipe fitting 3, via a servo motor 91. Specifically, the electromagnetic plate 8 is positioned on the top of the mounting frame 6, near the area directly above the axis of the spiral steel pipe fitting 3. The electromagnetic plate 8 and the servo motor 91 are synchronously connected via a transmission path, allowing the servo motor 91 to drive the electromagnetic plate 8 to produce relative displacement when in the corresponding transmission engagement state. The servo motor 91 controls the relative distance between the electromagnetic plate 8 and the top of the inner surface of the spiral steel pipe fitting 3, enabling the electromagnetic plate 8 to maintain a corresponding relative distance range based on the actual position of the top of the inner surface of the spiral steel pipe fitting 3. When the electromagnetic plate 8 is energized, it can produce [something related to the spiral steel pipe fitting 3]. The electromagnetic plate 8, when energized, generates a magnetic attraction on the spiral steel pipe fitting 3, causing it to move closer to the corresponding area of ​​the electromagnetic plate 8, thus forming a basis for upper constraint on the spiral steel pipe fitting 3. The laser welding device 7, electromagnetic plate 8, and traveling mechanism 11 are all electrically connected to the signal processing control unit 10 fixed on the top of the slide table mounting frame 6 via guide cables. The signal processing control unit 10 is fixedly installed on the top of the slide table mounting frame 6, and the guide cables are used to realize the electrical connection between the laser welding device 7, electromagnetic plate 8, traveling mechanism 11, and signal processing control unit 10, so that the relevant electrical components maintain a continuous electrical connection during the overall sliding process of the slide table mounting frame 6.

[0038] refer to Figure 2 , Figures 4-9The adjustment mechanism 9 also includes a clutch assembly 94 and two sets of transmission assemblies 93. The clutch assembly 94 and the two sets of transmission assemblies 93 together form the transmission basis for adjusting the position of the laser welding device 7 and the electromagnetic plate 8, enabling the servo motor 91 to selectively drive the corresponding branch action under different transmission engagement states. The clutch assembly 94 includes a ring rod 941 and a splined sleeve wheel 942. The splined sleeve wheel 942 is slidably connected to the surface of the spline rod 943, that is, the splined sleeve wheel 942 is in a sliding engagement state relative to the surface of the spline rod 943, so that the splined sleeve wheel 942 can generate relative displacement and form the subsequent transmission engagement condition while maintaining assembly constraints. The bottom of the spline rod 943 is fixed to the output shaft of the servo motor 91, so that the servo motor 91 outputs... The rotation of the end can be transmitted to the spline rod 943 and form the rotation reference of the spline rod 943. The outer side of the spline sleeve 942 is rotatably connected to the ring rod 941 through pressure balls. That is, a rotatable connection relationship is formed between the spline sleeve 942 and the ring rod 941 through pressure balls, so that the spline sleeve 942 and the ring rod 941 remain in contact when rotating relative to each other and can transmit the corresponding axial clamping force. One side of the ring rod 941 is fixed to the output end of the electric push rod 92. Therefore, the output end of the electric push rod 92 and the ring rod 941 maintain a fixed connection relationship, so that the extension and retraction of the electric push rod 92 can produce a relative displacement effect on the ring rod 941 and the spline sleeve 942 connected to it. The electric push rod 92 and the servo motor 91 are both fixed on the slide table mounting frame 6.

[0039] Therefore, both the servo motor 91 and the electric push rod 92 use the slide table mounting bracket 6 as the mounting reference to avoid relative sway caused by instability of the mounting base during transmission.

[0040] The transmission assembly 93 includes a main tooth 931 and an externally projecting ring 932. The main tooth 931 sequentially meshes with the transmission tooth 933 and the auxiliary tooth 934 on one side. That is, when the main tooth 931 rotates, it sequentially forms a meshing transmission relationship with the transmission tooth 933 and the auxiliary tooth 934, so that the rotation of the main tooth 931 can be transmitted to the end of the auxiliary tooth 934 through this meshing link. The main tooth 931 is limited to rotate on the slide table mounting frame 6 by the externally projecting ring 932. Thus, the main tooth 931 is in a restricted rotational installation state relative to the slide table mounting frame 6, which prevents the main tooth 931 from axially moving or disengaging when subjected to force.

[0041] The main teeth 931 of the two sets of transmission components 93 are sleeved on the spline rod 943 in opposite directions. That is, the two sets of main teeth 931 are located on opposite sides of the spline rod 943 and are arranged in opposite directions, so that the spline rod 943 is located in the middle area of ​​the two sets of main teeth 931. The spline rod 943 passes through the middle opening of the main teeth 931 and its outer wall does not contact the inner wall of the main teeth 931. Thus, there is no rigid meshing or rigid driving relationship between the spline rod 943 and the two sets of main teeth 931, so that the two sets of main teeth 931 can maintain the transmission separation state when they are not engaged. The two sets of auxiliary teeth 934 are fixedly connected to the lower lead screw 95 and the threaded cylinder 97 respectively. Therefore, the two sets of auxiliary teeth 934 form independent branches corresponding to the lower lead screw 95 and the upper threaded cylinder 97 respectively, so that the actions of different branches can act on the relative position adjustment of the laser welding device 7 and the electromagnetic plate 8 respectively.

[0042] Rubber ring protrusions 944 are fixedly connected to the end faces of the two sets of main teeth 931 near the splined sleeve 942. That is, the rubber ring protrusions 944 are set on the end faces of the two sets of main teeth 931 and near the splined sleeve 942, so that the rubber ring protrusions 944 can serve as a pressing part that contacts the end face of the splined sleeve 942. The end face of the splined sleeve 942 and the rubber ring protrusions 944 are in elastic material contact. "Elastic contact" means that the rubber ring protrusions 944 can be compressed when pressed, so that the rubber ring protrusions 944 form a continuous pressing action on the end face of the splined sleeve 942. Thus, when the splined sleeve 942 rotates, it can drive the corresponding single set of main teeth 931 to rotate synchronously under the elastic damping action generated by the pressing action. Then, the rotation is transmitted to the branch where the lower screw 95 or the threaded cylinder 97 is located through the transmission teeth 933 and the auxiliary teeth 934.

[0043] The lower lead screw 95 is limited in rotation at both ends by brackets below the slide table mounting frame 6, meaning the lower lead screw 95 is in a restricted rotational installation state relative to the slide table mounting frame 6, ensuring the axial position of the lower lead screw 95 remains stable during rotation. A nut seat 96 is fixedly connected to one side of the laser welding device 7, ensuring a fixed connection between the nut seat 96 and the laser welding device 7 and maintaining a constant relative position. The nut seat 96 is threaded onto the surface of the lower lead screw 95, allowing the rotation of the lower lead screw 95 to be converted into linear displacement of the nut seat 96 through the threaded joint. This changes the height of the laser welding device 7 relative to the area below the slide table mounting frame 6, adjusting the distance between the bottom detection welding position and the joint of the laser welding device 7. The threaded cylinder 97 is limited in rotation within the slide table mounting frame 6 by a convex ring shaft, meaning the convex ring shaft and the slide table mounting frame 6 form a restricted rotational support, keeping the threaded cylinder 97 within the slide table mounting frame 6. The installation is rotatable and non-dislodged. The threaded cylinder 97 is vertically continuous and internally threaded to the upper screw 98, forming a threaded pair. When the threaded cylinder 97 rotates, it can drive the upper screw 98 to generate axial displacement. The electromagnetic plate 8 is fixed on the top of the upper screw 98. Therefore, the axial displacement of the upper screw 98 will drive the electromagnetic plate 8 to rise and fall synchronously, thereby adjusting the relative distance between the electromagnetic plate 8 and the top of the inner surface of the spiral steel pipe fitting 3. One side of the electromagnetic plate 8 slides on the surface of the slide table mounting frame 6 through a limiting rod. The limiting rod provides guidance and constraint for the rising and falling process of the electromagnetic plate 8. When the electromagnetic plate 8 is energized and generates magnetic attraction to the spiral steel pipe fitting 3, the attraction force can be transmitted through the electromagnetic plate 8 to the upper screw 98, and then to the threaded cylinder 97. It also acts on the slide table mounting frame 6 as a whole through the convex ring shaft in the middle of the threaded cylinder 97, forming a closed loop of force transmission so that the slide table mounting frame 6 obtains a corresponding opposing force foundation.

[0044] In this embodiment, the adjustment mechanism 9 is used to adjust the position of the laser welding device 7 and the electromagnetic plate 8 during operation. The adjustment mechanism 9 includes a clutch assembly 94, two sets of transmission assemblies 93, and a lower lead screw 95, a nut seat 96, a threaded cylinder 97, and an upper lead screw 98 that cooperate with it. The servo motor 91 and the electric push rod 92 are fixed on the slide table mounting frame 6, so that the adjustment mechanism 9 remains stably assembled with the slide table mounting frame 6 as the installation reference during the lateral sliding of the slide table mounting frame 6.

[0045] Specifically, the output shaft of the servo motor 91 drives the spline rod 943, which is fixedly connected to it, to rotate. The spline sleeve 942 is slidably connected to the surface of the spline rod 943, and the outer side of the spline sleeve 942 is rotatedly sleeved with the ring rod 941 through pressure balls. One side of the ring rod 941 is fixed to the output end of the electric push rod 92. Therefore, when the electric push rod 92 extends or retracts, it can drive the ring rod 941 to generate displacement relative to the spline rod 943 and act on the spline sleeve 942, so that the spline sleeve 942 and the corresponding single set of main teeth 931 in the two sets of transmission components 93 form a transmission engagement or transmission disengagement state.

[0046] Two sets of main teeth 931 are sleeved on the spline rod 943 facing each other, and the spline rod 943 passes through the middle opening of the main teeth 931. The outer wall of the spline rod 943 does not contact the inner wall of the main teeth 931, so that the two sets of main teeth 931 remain in a transmission separation state when they are not engaged and do not rotate synchronously with the spline rod 943. This allows the servo motor 91 to drive only one branch during operation, while the other branch remains stationary.

[0047] Two sets of main teeth 931 are fixedly connected to rubber ring protrusions 944 on the end faces of the splined sleeve 942. The end face of the splined sleeve 942 and the rubber ring protrusions 944 are in elastic material contact. This elastic contact allows the rubber ring protrusions 944 to compress under pressure and continuously press against the splined sleeve 942. When the splined sleeve 942 rotates under the drive of the splined rod 943, the elastic damping action between it and the rubber ring protrusions 944 drives the corresponding single set of main teeth 931 to rotate synchronously. The rotation is then transmitted to the corresponding branch via the sequentially meshing transmission teeth 933 and auxiliary teeth 934 on one side of the main teeth 931. The two sets of auxiliary teeth 934 are respectively fixedly connected to the lower lead screw 95 and the threaded cylinder 97, allowing the transmission to act on either the lower lead screw 95 or the upper threaded cylinder 97.

[0048] When the adjusting mechanism 9 is in the transmission engagement state of driving the lower lead screw 95, the upper and lower ends of the lower lead screw 95 are limited to rotate below the slide table mounting frame 6 by the bracket, and the nut seat 96 is threadedly connected to the surface of the lower lead screw 95 and fixedly connected to one side of the laser welding device 7. Therefore, when the lower lead screw 95 is driven to rotate, it can convert the rotation into the linear displacement of the nut seat 96 through the threaded pair, thereby driving the laser welding device 7 to produce lifting and lowering adjustment to adapt to working conditions with different joint heights, different runout amplitudes, or different detection welding distance requirements. Correspondingly, when the adjusting mechanism 9 is in the transmission engagement state of driving the threaded cylinder 97, the middle part of the threaded cylinder 97 is limited to rotate within the slide table mounting frame 6 through the convex ring shaft. The threaded cylinder 97 is internally threaded with an upper screw 98 and the electromagnetic plate 8 is fixed on the top of the upper screw 98. Therefore, after the threaded cylinder 97 is driven to rotate, it can drive the upper screw 98 to move axially through the threaded pair, so that the distance between the electromagnetic plate 8 and the top of the inner surface of the spiral steel pipe 3 can be adjusted. Moreover, one side of the electromagnetic plate 8 slides on the surface of the slide table mounting frame 6 through the limiting rod, so that the electromagnetic plate 8 maintains guiding constraint and reduces the risk of sway during the lifting process.

[0049] During the inspection or repair welding of the inner wall joints of the steel pipe, the rotation of the spiral steel pipe fitting 3 and the non-roundness of the inner wall may cause slight changes in the joint position. Through the separate transmission adjustment method of the aforementioned adjustment mechanism 9, the laser welding device 7 and the electromagnetic plate 8 can be adjusted in position at different operation stages without interfering with each other. This makes it easier for the laser welding device 7 to maintain the appropriate distance between the inspection and welding position and the joint. At the same time, the electromagnetic plate 8 can be energized to generate magnetic attraction to the spiral steel pipe fitting 3 and suppress the pipe fitting's vibration. When the spiral steel pipe fitting 3 is attracted by electricity, the attraction force is transmitted to the upper screw 98 and the threaded cylinder 97 through the electromagnetic plate 8, and then acts on the entire slide table mounting frame 6 through the convex ring shaft in the middle of the threaded cylinder 97, forming a closed loop of force transmission from the electromagnetic plate 8 to the upper screw 98, the threaded cylinder 97, the convex ring shaft, and the slide table mounting frame 6. This allows the slide table mounting frame 6 to obtain a counter-force foundation at the cantilever position of the long cantilever slide rail 5, which helps to reduce the stress burden on the long cantilever slide rail 5 by the slide table mounting frame 6 and its mounting structure, and reduces the impact of cantilever deflection on the operational stability.

[0050] refer to Figure 6 and Figure 8 The traveling mechanism 11 includes a stepper motor 111 and traveling wheels 112. The stepper motor 111 and the traveling wheels 112 together constitute the traveling drive mechanism of the slide table mounting frame 6 on the long cantilever slide rail 5, providing the slide table mounting frame 6 with the power source to move along the slide rail direction at the cantilever position of the long cantilever slide rail 5. The output shaft of the stepper motor 111 is connected to the two sets of traveling wheels 112 through a gear set. That is, when the output shaft of the stepper motor 111 rotates, the rotation is transmitted to the two sets of traveling wheels 112 through the gear set, so that the two sets of traveling wheels 112 obtain synchronous or coordinated rotational driving force, thereby ensuring that the two sets of traveling wheels 112 have consistent rotational driving force during operation. The two sets of traveling wheels 112 contact the long cantilever slide rail 5, providing the slide table mounting frame 6 with the ability to move laterally on the surface of the long cantilever slide rail 5. The two sets of traveling wheels 112 maintain contact with the long cantilever slide rail 5. When the stepper motor 111 drives the two sets of traveling wheels 112 to rotate, the two sets of traveling wheels 112 generate a rolling / friction driving effect on the slide rail surface, causing the slide table mounting frame 6 to move laterally above the long cantilever slide rail 5 along the slide rail direction. Furthermore, the symmetrical arrangement of the two sets of traveling wheels 112 makes the force on the slide table mounting frame 6 more balanced during lateral movement, thereby reducing the tendency of swaying or jamming caused by unilateral force.

[0051] refer to Figures 1-3The rotating unit 2 includes a bottom support roller 21, a multi-angle loading frame 22, and two sets of auxiliary support groups 27. The bottom support roller 21 serves as the main load-bearing component of the rotating unit 2, providing the mounting foundation and relative movement constraint space for components such as the multi-angle loading frame 22 and the auxiliary support groups 27. The multi-angle loading frame 22 is located in the middle of the bottom support roller 21 to form a movable support relationship for the spiral steel pipe fitting 3. The two sets of auxiliary support groups 27 are located at both ends of the bottom support roller 21 to provide support and limiting fit for the two end areas of the spiral steel pipe fitting 3. Each component of the auxiliary support group 27 only provides support to the ends of the bottom support roller 21; except for the absence of the geared assembly 26 and motor components, it is identical to the multi-angle loading frame 22. The multi-angle loading frame 22 is movably mounted in the middle of the bottom support roller 21, meaning that the multi-angle loading frame 22 is in a movable configuration in the middle of the bottom support roller 21. In the combined state, the multi-angle loading frame 22 can rotate or adjust its posture under the constraint of the bottom support roller 21, thereby adapting to the clamping and support states of the spiral steel pipe 3 under different working conditions. The multi-angle loading frame 22 is rotatably mounted above the triangular platform 25, which is fixed above the base 1 and serves as the rotation support reference for the multi-angle loading frame 22. This forms a rotation pair between the multi-angle loading frame 22 and the triangular platform 25, with the rotation pair serving as the reference point for posture changes. The triangular platform 25 is fixed to the base 1, ensuring that the triangular platform 25 remains stably installed relative to the base 1 during operation, preventing the rotation support point of the multi-angle loading frame 22 from drifting relative to the overall movement of the base 1. Drive rollers 24 are rotatably mounted on both sides of the multi-angle loading frame 22 near the bottom support roller 21 via shafts. That is, two sets of drive rollers 24 are respectively mounted on both sides of the multi-angle loading frame 22 and rotatably mounted via shafts, allowing the drive rollers 24 to rotate with the multi-angle loading frame 22 under restricted conditions and providing a basis for rotational drive or contact support of the spiral steel pipe 3.

[0052] The two sets of drive rollers 24 are connected to the motor via a geared assembly 26 at their adjacent midpoints. The geared assembly 26 is located in the adjacent midpoint of the two sets of drive rollers 24 and forms a transmission relationship with the motor, so that the rotation output by the motor can be transmitted to the two sets of drive rollers 24 via the geared assembly 26. This allows the two sets of drive rollers 24 to rotate synchronously or in coordination when driven. The auxiliary support group 27 is located at both ends of the bottom support roller 21, so that the two ends of the spiral steel pipe 3 can obtain corresponding support and limiting cooperation at both ends of the bottom support roller 21 when it is erected. Both the multi-angle loading frame 22 and the auxiliary support group 27 drive the bottom support roller 21 to swing around the rotational connection point of the multi-angle loading frame 22 and the triangular platform 25 as the center through the hydraulic rod 23. That is, the hydraulic rod 23 forms a driving relationship with the multi-angle loading frame 22 and the auxiliary support group 27. Under the action of the hydraulic rod 23, the bottom support roller 21 swings relative to the base 1. The swing is centered on the rotational connection between the multi-angle loading frame 22 and the triangular platform 25. The bottom support roller 21 maintains a predetermined rotation reference and attitude change path during the swing, thereby adjusting the support position of the multi-angle loading frame 22 and the two auxiliary support groups 27 relative to the spiral steel pipe 3.

[0053] Working principle:

[0054] Step 1: Clamping and Initial Alignment

[0055] The spiral steel pipe fitting 3 is mounted on top of the base 1 via the rotating unit 2, so that the spiral steel pipe fitting 3 is in a rotatable support state; the long cantilever slide rail 5 is located on one side of the base 1 and extends to form a cantilever, and the end support platform 4 supports the end of the long cantilever slide rail 5. At this time, the slide table mounting frame 6 is located above the long cantilever slide rail 5 and is in a ready-to-feed state that can move laterally along the long cantilever slide rail 5 via the traveling mechanism 11. The laser welding device 7 and the electromagnetic plate 8 are respectively located above and below the corresponding positions in the working area inside the spiral steel pipe fitting 3.

[0056] Step 2: The weld seam passes through the work area

[0057] The rotation unit 2 drives the spiral steel pipe 3 to rotate, causing the spiral steel pipe 3 to rotate around its own axis. This allows the inner wall joint of the spiral steel pipe 3 to continuously pass through the detection and welding position corresponding to the laser welding device 7 in the circumferential direction, providing a basis for continuous detection / repair welding.

[0058] Step 3: Achieve axial coverage using cantilever feed

[0059] While the spiral steel pipe fitting 3 continues to rotate, the traveling mechanism 11 drives the slide table mounting frame 6 to slide laterally along the long cantilever slide rail 5, so that the laser welding device 7 and the electromagnetic plate 8 move segment by segment along the axial direction of the spiral steel pipe fitting 3 with the slide table mounting frame 6, thereby achieving continuous axial coverage of the spiral joint on the inner wall of the spiral steel pipe fitting 3.

[0060] Step 4: Adjust the working spacing of laser welding device 7

[0061] When entering a specific inspection / welding operation, the adjustment mechanism 9 keeps the laser welding device 7 at the required working distance relative to the inner wall joint of the spiral steel pipe fitting 3, so that the inspection and welding position of the laser welding device 7 is adapted to the joint to meet the operation needs under different joint height, runout amplitude or spacing requirements.

[0062] Step 5: Adjust and activate the electromagnetic clamping mechanism of electromagnetic plate 8.

[0063] When it is necessary to suppress the jumping of the spiral steel pipe fitting 3 and improve the stability of operation, the relative distance between the electromagnetic plate 8 and the top of the inner surface of the spiral steel pipe fitting 3 is adjusted by another transmission branch of the adjustment mechanism 9. After the adjustment is in place, the electromagnetic plate 8 is energized to generate magnetic attraction, so that the spiral steel pipe fitting 3 forms a compressed constraint state in the upper area, reducing the sway and jumping of the spiral steel pipe fitting 3 during the rotation process, and making the joint more stable when passing through the working area.

[0064] Step Six: Form a closed loop for load reduction and continue operation.

[0065] While the electromagnetic plate 8 adsorbs and presses the spiral steel pipe fitting 3, the attractive force is transmitted downward through the electromagnetic plate 8 to the transmission component connected to it and acts on the entire slide table mounting frame 6, giving the slide table mounting frame 6 a counter-tension, thereby reducing the load on the long cantilever slide rail 5 and reducing the cantilever stress and deflection tendency of the long cantilever slide rail 5. In this state, the coordinated process of "rotation of spiral steel pipe fitting 3 + axial feed of slide table mounting frame 6 + spacing adaptation of laser welding device 7 + pressing and load reduction of electromagnetic plate 8" is maintained, realizing continuous detection and repair welding of the butt joint. During the operation, the laser welding device 7, electromagnetic plate 8 and traveling mechanism 11 are electrically connected to the signal processing control unit 10 fixed on the top of the slide table mounting frame 6 through the guide cable to ensure continuous electrical connection when the slide table mounting frame 6 moves.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding device for steel pipe processing and manufacturing, comprising a base (1), a spiral steel pipe fitting (3) movably mounted above the base (1) via a rotating unit (2), and a long cantilever slide rail (5) that slides laterally on one side of the base (1) via a pulley, characterized in that, An end support platform (4) is slidably set on one side of the base (1) near the long cantilever slide rail (5) to support the end of the long cantilever slide rail (5). A slide table mounting frame (6) is set above the long cantilever slide rail (5). The slide table mounting frame (6) slides laterally above the long cantilever slide rail (5) by the drive of the back travel mechanism (11). The slide table mounting frame (6) is movably connected to the laser welding device (7) on one side by the adjustment mechanism (9). The adjustment mechanism (9) includes a servo motor (91) and an electric push rod (92). The servo motor (91) is used to control the distance between the bottom detection welding position and the joint of the laser welding device (7). The area directly above the axis of the spiral steel pipe fitting (3) near the top of the slide table mounting frame (6) is connected to an electromagnetic plate (8) via a servo motor (91). The servo motor (91) is used to control the relative distance between the electromagnetic plate (8) and the top of the inner surface of the spiral steel pipe fitting (3). When the electromagnetic plate (8) is energized, it can generate magnetic attraction to the spiral steel pipe fitting (3). The laser welding device (7), the electromagnetic plate (8) and the traveling mechanism (11) are all electrically connected to the signal processing control unit (10) fixed on the top of the slide table mounting frame (6) via a guide cable.

2. The welding apparatus for steel pipe processing and fabrication according to claim 1, characterized in that, The adjustment mechanism (9) also includes a clutch assembly (94) and two sets of transmission assemblies (93). The clutch assembly (94) includes a ring rod (941) and a splined sleeve wheel (942). The splined sleeve wheel (942) is slidably connected to the surface of the splined rod (943). The bottom of the splined rod (943) is fixed to the output shaft of the servo motor (91). The outer side of the splined sleeve wheel (942) is rotatedly connected to the ring rod (941) through pressure balls. One side of the ring rod (941) is fixed to the output end of the electric push rod (92). The electric push rod (92) and the servo motor (91) are both fixed on the slide table mounting frame (6).

3. The welding apparatus for steel pipe processing and fabrication according to claim 2, characterized in that, The transmission assembly (93) includes a main tooth (931) and an external convex ring (932). The main tooth (931) sequentially meshes with the transmission tooth (933) and the auxiliary tooth (934) on one side. The main tooth (931) is limited to rotate on the slide mounting frame (6) by the external convex ring (932).

4. The welding apparatus for steel pipe processing and fabrication according to claim 3, characterized in that, The main teeth (931) of the two sets of transmission components (93) are sleeved on the spline rod (943) facing each other. The spline rod (943) passes through the middle opening of the main teeth (931) and its outer wall does not contact the inner wall of the main teeth (931). The two sets of auxiliary teeth (934) are respectively fixedly connected to the lower lead screw (95) and the threaded cylinder (97).

5. The welding apparatus for steel pipe processing and fabrication according to claim 4, characterized in that, Two sets of main teeth (931) are fixedly connected to rubber ring protrusions (944) on the end faces of the splined sleeve (942), and the end face of the splined sleeve (942) and the rubber ring protrusions (944) are in elastic material contact.

6. The welding apparatus for steel pipe processing and fabrication according to claim 4, characterized in that, The lower lead screw (95) is limited to rotate at both ends by the bracket and is located below the slide table mounting frame (6). The nut seat (96) is fixedly connected to one side of the laser welding device (7). The nut seat (96) is threadedly connected to the surface of the lower lead screw (95). The middle part of the threaded cylinder (97) is limited to rotate inside the slide table mounting frame (6) by the convex ring shaft. The threaded cylinder (97) is through the upper lead screw (98) and is threadedly connected to the upper lead screw (98). The electromagnetic plate (8) is fixed to the top of the upper lead screw (98). The electromagnetic plate (8) slides on the surface of the slide table mounting frame (6) by the limiting rod on one side.

7. The welding apparatus for steel pipe processing and fabrication according to claim 1, characterized in that, The traveling mechanism (11) includes a stepper motor (111) and a traveling wheel (112). The output shaft of the stepper motor (111) is connected to two sets of traveling wheels (112) through a gear set. The two sets of traveling wheels (112) contact the long cantilever slide rail (5) to provide the slide table mounting frame (6) with the ability to move laterally on the surface of the long cantilever slide rail (5).

8. The welding apparatus for steel pipe processing and fabrication according to claim 1, characterized in that, The rotating unit (2) includes a bottom support roller (21), a multi-angle loading frame (22) and two sets of auxiliary support groups (27). The multi-angle loading frame (22) is movably mounted in the middle of the bottom support roller (21). The multi-angle loading frame (22) is rotatably mounted above the triangular platform (25). The triangular platform (25) is fixed to the base (1). Drive rollers (24) are rotatably mounted on both sides of the multi-angle loading frame (22) near the top of the bottom support roller (21) via shafts.

9. A welding apparatus for steel pipe processing and fabrication according to claim 8, characterized in that, The two sets of drive rollers (24) are connected to the motor via a gear assembly (26) at their adjacent middle positions. The auxiliary support group (27) is set at both ends of the bottom support roller (21). The multi-angle loading frame (22) and the auxiliary support group (27) are both driven by the hydraulic rod (23) to make the bottom support roller (21) swing around the point where the multi-angle loading frame (22) and the triangular platform (25) are connected.

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