Large-scale engineering steel pipe laser welding equipment

Abstract

The application relates to a large-scale engineering steel pipeline laser welding device, and relates to the technical field of pipeline welding devices, which comprises a workbench, a clamping mechanism, a moving butt joint mechanism, a rotating mechanism and a welding mechanism, and further comprises a cleaning mechanism; the moving butt joint mechanism comprises a bidirectional threaded rod rotatably installed on the workbench; the rotating mechanism comprises a rotating shaft rotatably installed on the workbench; the cleaning mechanism comprises cleaning half-rings symmetrically arranged on the workbench, a driving assembly used for driving the two cleaning half-rings to abut against the surface of the pipeline, a starting assembly used for driving the two cleaning half-rings to move along the pipeline in the axial direction, and a locking assembly; the locking assembly is used for connecting the two cleaning half-rings and the welding mechanism together, so that the welding mechanism carries out welding treatment only after the two cleaning half-rings finish cleaning the surface of the pipeline. The application has the effect that dust and impurities attached to the outer wall of the pipeline can be cleaned before welding, and pores in the welding seam during welding are avoided.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding equipment technology, and in particular to a laser welding equipment for large-scale engineering steel pipelines. Background Technology

[0002] Large-scale engineering steel pipelines are widely used in major engineering projects such as municipal water supply and drainage, oil and gas transportation, power and heat supply, and industrial pipeline networks. The quality of the butt welding between pipelines directly determines the overall sealing, stability, and service life of the pipeline network. Laser welding, with its advantages of high welding precision, small thermal deformation, beautiful weld formation, and high welding strength, is gradually becoming the mainstream welding process for large-scale steel pipelines.

[0003] Existing laser welding equipment for large-scale engineering steel pipes includes a worktable, clamping mechanism, moving docking mechanism, rotating mechanism, and welding mechanism. During operation, the operator places two sections of steel pipe to be processed into the clamping mechanism on the worktable, then clamps and secures them. Next, the moving docking mechanism moves the two pipe sections axially to meet and assemble them. Finally, the rotating mechanism rotates the assembled steel pipes, and simultaneously the welding mechanism welds the joint, thus completing the laser welding operation on the steel pipe.

[0004] In the above structure, when welding the pipe, it is impossible to remove the dust and impurities attached to the outer wall of the pipe, which makes the weld seam prone to porosity during welding, thus greatly reducing the quality of the weld. At the same time, it is necessary to manually repair the weld seam, which greatly increases the production cost. Summary of the Invention

[0005] In order to clean the dust and impurities adhering to the outer wall of the pipe before welding and avoid defects such as porosity in the weld during welding, this invention provides a laser welding equipment for large-scale engineering steel pipes.

[0006] This invention provides a laser welding equipment for large-scale engineering steel pipes, employing the following technical solution: A large-scale engineering steel pipe laser welding equipment includes a worktable, a clamping mechanism symmetrically arranged on the worktable for clamping and fixing pipes, a movable docking mechanism for joining two clamped pipes together, a rotating mechanism for driving the joined pipes to rotate synchronously, and a welding mechanism for welding two pipes together. It also includes a cleaning mechanism for cleaning the pipe surface. The movable docking mechanism includes a bidirectional threaded rod rotatably mounted on the worktable; the rotating mechanism includes a rotating shaft rotatably mounted on the worktable. The cleaning mechanism includes cleaning half-rings symmetrically arranged on the workbench, a drive assembly connected to the bidirectional threaded rod for driving the two cleaning half-rings to abut against the pipe surface, a starting assembly connected to the rotating shaft for driving the two cleaning half-rings to move along the pipe axis, and a locking assembly. The locking component is used to connect the two cleaning half-rings to the welding mechanism so that the welding mechanism performs welding only after the two cleaning half-rings have finished cleaning the pipe surface.

[0007] By adopting the above technical solution, a cleaning half-ring is used to perform a spiral-style comprehensive cleaning of the outer wall of the pipe before welding, effectively removing attached dust and impurities, preventing porosity defects in the weld during welding, improving welding quality, and reducing the cost of manual secondary repairs. Furthermore, a locking assembly connects the cleaning half-ring to the welding mechanism, ensuring that welding can only proceed after the cleaning process is complete, avoiding welding operations performed before cleaning.

[0008] Optionally, the drive assembly includes two drive blocks threadedly connected to the bidirectional threaded rod, a drive plate that is lifted and installed inside the worktable, a drive rod hinged between the drive blocks and the drive plate, a U-shaped frame that is slidably installed on the worktable, and a rotating rod hinged between the U-shaped frame and the drive plate. The number of U-shaped frames is two and they are symmetrically arranged on the workbench. The two cleaning semi-rings are slidably installed in the corresponding U-shaped frames. When the bidirectional threaded rod rotates, it drives the two cleaning semi-rings to move closer to each other and fit against the surface of the pipe.

[0009] By adopting the above technical solution, when the bidirectional threaded rod rotates, it drives the two drive blocks connected to it to move away from each other. When the two drive blocks move away from each other, they drive the drive rod to rotate. When the drive rod rotates, it drives the drive plate to rise and fall. When the drive plate rises and falls, it drives the rotating rod to rotate. When the rotating rod rotates, it pushes the U-shaped frame and the cleaning half-ring closer to each other, thereby realizing the synchronous operation of pipe docking and cleaning half-ring fitting.

[0010] Optionally, a support frame is slidably mounted on the worktable, the clamping mechanism is rotatably mounted on the support frame, and a rotating shaft connected to the starting component is mounted on the support frame to drive the clamping mechanism to rotate. The starting assembly includes a first synchronous pulley keyed to the rotating shaft, a second synchronous pulley mounted on the rotating shaft, a synchronous belt for driving the first synchronous pulley and the second synchronous pulley to rotate synchronously, a starting disc mounted on the first synchronous pulley, two threaded rods threadedly connected to the two cleaning semi-circular rings, and two rotating discs mounted on the two threaded rods.

[0011] By adopting the above technical solution, the first synchronous pulley, synchronous belt and the second synchronous pulley on the rotating shaft are used to drive the rotating shaft to rotate synchronously, thereby driving the clamping mechanism and the pipe clamped by the clamping mechanism to rotate. At the same time, the starting disc on the first synchronous pulley meshes with the rotating disc, driving the threaded rod to rotate, so that the cleaning half ring moves along the axial direction of the pipe, thereby realizing the spiral cleaning of the pipe by the cleaning half ring to remove dust and impurities from the surface.

[0012] Optionally, a tensioning assembly is provided between the two rotating disks. The tensioning assembly is used to drive the two rotating disks to move closer together and engage with the starting disk when the two cleaning half-rings approach each other. When the rotating shaft rotates, it drives the starting disk and the rotating disk to rotate, thereby driving the cleaning half-ring to move along the pipe axis. The stretching assembly includes two stretching sleeves rotatably mounted on the two rotating disks and a first compression spring installed between the two stretching sleeves; the first compression spring drives the two rotating disks to always tend to move closer to each other.

[0013] By adopting the above technical solution, a tension sleeve and a first compression spring are set between the two rotating disks. When the cleaning half rings approach each other, the first compression spring is compressed, thereby driving the two rotating disks to approach each other and making both rotating disks engage with the starting disk. Thus, when the pipeline rotates, the starting disk is driven to rotate synchronously with the two rotating disks, thereby driving the cleaning half rings to move along the pipeline axis.

[0014] Optionally, the locking assembly includes a telescopic structure that is slidably mounted on the workbench and mounted on the cleaning half-ring, a locking block mounted on the telescopic structure, a connecting plate inserted into the locking block and connected to the welding mechanism, and a locking plate that is slidably mounted in the locking block to lock the connecting plate. The locking plate has an inclined surface; when the cleaning half-ring moves, the locking plate locks the connecting plate and the locking block, causing the welding mechanism to move synchronously with the cleaning half-ring.

[0015] By adopting the above technical solution, the locking block, the connecting plate and the locking plate cooperate with each other to fix the cleaning half ring and the welding mechanism together, so that when the cleaning half ring moves along the pipeline axis, it drives the welding mechanism to move synchronously along the pipeline axis with the cleaning half ring.

[0016] Optionally, the workbench is equipped with an unlocking plate for unlocking the locking plate, the locking block has a through hole for the unlocking plate to pass through, and the unlocking plate has an unlocking surface that matches the inclined surface of the locking plate; The locking block has a sliding groove, and the locking plate is slidably installed in the sliding groove; when the cleaning half-ring drives the welding mechanism to the welding position, the unlocking surface of the unlocking plate lifts the locking plate to unlock the welding mechanism from the cleaning half-ring so that the welding mechanism can perform welding processing.

[0017] By adopting the above technical solution, an unlocking plate is fixedly installed on the workbench. When the locking block moves to the welding position with the cleaning half ring, the unlocking surface of the unlocking plate cooperates with the inclined surface of the locking plate, automatically lifting the locking plate so that the locking plate no longer locks the connecting plate and the locking block. This separates the welding mechanism from the cleaning half ring, allowing the welding mechanism to stop at the pipe connection point for welding, while the cleaning half ring continues to move to avoid affecting the welding mechanism's welding work.

[0018] Optionally, the telescopic structure includes a rectangular sleeve slidably mounted on the worktable and mounted on the locking block, a connecting block slidably mounted inside the rectangular sleeve and mounted on the cleaning half-ring, a limiting block mounted on the connecting block and slidably mounted inside the rectangular sleeve, and a second compression spring mounted between the limiting block and the rectangular sleeve; The second compression spring drives the cleaning half-ring to always tend to move away from the locking block.

[0019] By adopting the above technical solution, the rectangular sleeve, connecting block, limiting block and second compression spring form a telescopic structure, so that when the cleaning half ring moves, the connecting block and limiting block slide in the rectangular sleeve and stretch the second compression spring, thereby keeping the locking block stable and thus keeping the locking block connected to the welding mechanism stably.

[0020] Optionally, the welding mechanism includes a gantry frame that slides on the workbench, a lifting plate that is lifted on the gantry frame, a laser welding gun that is mounted on the lifting plate and used for welding the pipe, and a hydraulic cylinder that is mounted on the gantry frame and used to drive the laser welding gun closer to the pipe. The connecting plate is installed on the gantry frame, and a first limiting telescopic column is installed on the lifting plate. The other end of the first limiting telescopic column is installed on the gantry frame to limit and guide the laser welding gun when it is raised and lowered.

[0021] By adopting the above technical solution, the gantry is slidably installed on the workbench, and the lifting plate is driven to rise and fall by a hydraulic cylinder, and guided by the first limit telescopic column to ensure the stability of the vertical movement of the laser welding gun. This allows the laser welding gun to accurately reach the pipe joint and weld the pipe joint while the pipe is rotating, thereby achieving continuous annular welding of the pipe and forming a uniform and dense weld.

[0022] Optionally, the moving docking mechanism further includes a drive frame mounted on the support frame and threadedly connected to the bidirectional threaded rod, and a first motor mounted on the worktable for driving the bidirectional threaded rod to rotate; the rotating mechanism further includes a second motor mounted on the worktable for driving the rotating shaft to rotate. The workbench is equipped with a guide plate, and the drive frame is slidably sleeved on the guide plate to make the drive frame move more stably when the pipe is connected.

[0023] By adopting the above technical solution, when the bidirectional threaded rod rotates, it drives the drive frame connected to it to move. When the drive frame moves, it is guided by the guide plate, which makes the pipe connection more precise and thus improves the pipe connection accuracy.

[0024] Optionally, the clamping mechanism includes a rotary table rotatably mounted on the support frame, a clamping plate slidably mounted on the rotary table for clamping the pipe, a rotating disk installed inside the rotary table, a first connecting rod hinged to the rotating disk, a second connecting rod hinged between the first connecting rod and the clamping plate, and a third motor installed inside the rotary table for driving the rotating disk to rotate.

[0025] By adopting the above technical solution, the third motor drives the rotating disk to rotate. When the rotating disk rotates, it drives the first connecting rod to rotate. When the first connecting rod rotates, it drives the second connecting rod to rotate. When the second connecting rod rotates, it drives the clamping plate to slide radially along the rotating table, thereby enabling the clamping plate to automatically center and clamp the pipe, preventing the pipe from shifting or shaking when rotating.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a cleaning half-ring to perform a spiral-style comprehensive cleaning of the pipe's outer wall before welding, adhering dust and impurities are effectively removed, preventing porosity defects in the weld during welding, improving welding quality, and reducing the cost of manual secondary repairs. Furthermore, a locking assembly connects the cleaning half-ring to the welding mechanism, ensuring that welding can only proceed after cleaning is complete, preventing welding operations from being performed before cleaning. 2. By utilizing the first synchronous pulley, synchronous belt, and second synchronous pulley on the rotating shaft, the rotating shaft is synchronously driven to rotate, thereby driving the clamping mechanism and the pipe clamped by the clamping mechanism to rotate. At the same time, the starting disc on the first synchronous pulley meshes with the rotating disc, driving the threaded rod to rotate, causing the cleaning half-ring to move along the axial direction of the pipe, thereby realizing the spiral cleaning of the pipe by the cleaning half-ring to remove dust and impurities from the surface. 3. By starting the bidirectional threaded rod to rotate, the two drive blocks connected to it by the thread are driven to move away from each other. When the two drive blocks move away from each other, they drive the drive rod to rotate. When the drive rod rotates, it drives the drive plate to rise and fall. When the drive plate rises and falls, it drives the rotating rod to rotate. When the rotating rod rotates, it pushes the U-shaped frame and the cleaning half ring to move closer to each other, thereby realizing the synchronous operation of pipe docking and cleaning half ring fitting. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a large-scale engineering steel pipe laser welding equipment; Figure 2 This is a cross-sectional view of a large-scale engineering steel pipe laser welding equipment; Figure 3 This is a cross-sectional view of the clamping mechanism; Figure 4 This is a cross-sectional view of the movable docking mechanism; Figure 5 This is a schematic diagram of the driver component; Figure 6 This is a cross-sectional view of the rotating mechanism and the starting component; Figure 7 This is a cross-sectional view of the stretching component; Figure 8 This is a cross-sectional view of the locked component; Figure 9 This is a cross-sectional view of the telescopic structure; Figure 10 This is a schematic diagram of the welding mechanism.

[0028] The parts referred to by the numbers in the above attached figures are as follows: 1. Worktable; 11. Moving hole; 12. Support frame; 121. First annular groove; 122. First arc-shaped plate; 123. Rotating shaft; 124. Second annular groove; 125. Second arc-shaped plate; 13. Working chamber; 14. Rectangular hole; 15. Unlocking plate; 2. Clamping mechanism; 21. Clamping plate; 22. Rotating disk; 23. First connecting rod; 24. Second connecting rod; 25. 26. Third motor; 27. Rotary table; 28. Mounting chamber; 29. ​​Drive shaft; 20. Clamping hole; 30. Moving docking mechanism; 31. Bidirectional threaded rod; 32. Drive frame; 33. First motor; 34. Guide plate; 45. Cleaning mechanism; 46. Cleaning half-ring; 47. Drive assembly; 48. Drive block; 49. Drive plate; 40. Drive rod; 41. U-shaped frame; 42. Rotating rod; 426. Second limit telescopic column; 427. 428. Guide groove; 429. Rectangular groove; 43. Rectangular block; 44. Starting assembly; 431. First synchronous pulley; 432. Second synchronous pulley; 433. Synchronous belt; 434. Starting disc; 435. Rotary disc; 436. Threaded rod; 437. Starting cylinder; 44. Locking assembly; 441. Locking block; 442. Connecting plate; 443. Locking plate; 444. Locking hole; 445. Limiting block; 446. Through hole; 447. Sliding groove; 4 48. Telescopic structure; 4481. Rectangular sleeve; 4482. Connecting block; 4483. Limiting block; 4484. Second compression spring; 5. Rotating mechanism; 51. Rotating shaft; 52. Second motor; 6. Tensioning assembly; 61. Tensioning sleeve; 62. First compression spring; 7. Welding mechanism; 71. Gantry frame; 72. Lifting plate; 73. Laser welding gun; 74. Hydraulic cylinder; 75. Sliding groove; 76. Rectangular block; 77. First limiting telescopic column. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses a laser welding equipment for large-scale engineering steel pipes.

[0031] Reference Figure 1 as well as Figure 2 A large-scale engineering steel pipe laser welding equipment includes a worktable 1, a clamping mechanism 2, a moving docking mechanism 3, a rotating mechanism 5, a welding mechanism 7, and a cleaning mechanism 4.

[0032] Two movable holes 11 are provided on the worktable 1, and a support frame 12 is slidably installed in each of the two movable holes 11. Clamping mechanisms 2 are symmetrically arranged on the worktable 1, and the two clamping mechanisms 2 are rotatably mounted on their respective support frames 12, used to clamp and fix the pipes to be processed. A movable docking mechanism 3 is installed on the worktable 1, used to drive the two support frames 12 to slide along the movable holes 11 to dock the two pipes to be processed together. A rotating mechanism 5 is installed on the worktable 1, used to drive the docked pipes to rotate synchronously. A welding mechanism 7 is installed on the worktable 1, used to weld the two pipes together. A cleaning mechanism 4 is installed on the worktable 1, used to clean dust and impurities adhering to the pipe surface before the welding mechanism 7 operates. This equipment is suitable for steel pipes of the same type and length.

[0033] During operation, the two steel pipe sections are first placed in the clamping mechanisms 2 of the two side support frames 12. Then, the clamping mechanisms 2 are activated to clamp and fix the steel pipes. Next, the moving docking mechanism 3 is activated, which drives the two support frames 12 to slide along the moving holes 11 of the worktable 1, so that the two clamped steel pipe sections are brought closer to each other and docked together. Then, the cleaning mechanism 4 is activated to clean the dust and impurities on the surface of the steel pipes, thereby avoiding defects such as porosity in the weld during welding. Finally, the welding mechanism 7 is activated to weld the joint of the two steel pipe sections to complete the entire welding work.

[0034] Reference Figure 3 The clamping mechanism 2 includes a rotary table 26, a clamping plate 21, a rotating disk 22, a first connecting rod 23, a second connecting rod 24, and a third motor 25.

[0035] A first annular groove 121 is provided on the support frame 12, and a first arc-shaped plate 122 is rotatably mounted in the first annular groove 121. The first arc-shaped plate 122 is mounted on the rotary table 26. The rotary table 26 has an installation chamber 27 inside, and a third motor 25 is fixedly mounted on the bottom wall of the installation chamber 27. The output end of the third motor 25 is fixedly connected to a drive shaft 28 via a coupling, and the other end of the drive shaft 28 is fixedly mounted on the rotating disk 22. A first connecting rod 23 is hinged to the side of the rotating disk 22 away from the third motor 25, and the other end of the first connecting rod 23 is hinged to a second connecting rod 24. The other end of the second connecting rod 24 is fixedly mounted on a clamping plate 21. A clamping hole 29 is provided on the rotary table 26, and the clamping plate 21 is slidably mounted in the clamping hole 29.

[0036] During operation, the two sections of steel pipe are first placed on the rotating platform 26 of the two side support frames 12. Then, the third motor 25 is started, which drives the drive shaft 28 to rotate. When the drive shaft 28 rotates, it drives the rotating disk 22 to rotate. When the rotating disk 22 rotates, it drives the first connecting rod 23 to rotate. When the first connecting rod 23 rotates, it drives the second connecting rod 24 to move. When the second connecting rod 24 moves, it drives the clamping plate 21 to slide along the clamping hole 29 of the rotating platform 26, so that the clamping plate 21 clamps and fixes the pipe on the rotating platform 26.

[0037] Reference Figure 2 as well as Figure 4 The worktable 1 has a working chamber 13 inside, and the moving docking mechanism 3 is located inside the working chamber 13. The moving docking mechanism 3 includes a bidirectional threaded rod 31, a drive frame 32, and a first motor 33.

[0038] A bidirectional threaded rod 31 is rotatably mounted on the worktable 1. A first motor 33 is fixedly mounted on the worktable 1, and its output end is fixedly connected to the bidirectional threaded rod 31 via a coupling. Two drive frames 32 are symmetrically arranged on the worktable 1. The two drive frames 32 are fixedly mounted on corresponding support frames 12, and both drive frames 32 are threadedly connected to the bidirectional threaded rod 31. A guide plate 34 is fixedly installed inside the working chamber 13. Both drive frames 32 are slidably sleeved on the guide plate 34 to guide the movement of the drive frames 32, thereby making the movement of the drive frames 32 more stable.

[0039] Reference Figure 1 as well as Figure 2 The cleaning mechanism 4 includes a cleaning half-ring 41, a drive component 42, a start component 43, and a locking component 44.

[0040] Two cleaning half-rings 41 are symmetrically arranged on the worktable 1. A rectangular hole 14 is provided on the top of the worktable 1, through which the cleaning half-rings 41 pass for movement. The drive assembly 42 is connected to the bidirectional threaded rod 31 and is used to drive the two cleaning half-rings 41 to abut together and fit against the surface of the steel pipe to be processed.

[0041] Reference Figure 2 and Figure 5 The drive assembly 42 includes a drive block 421, a drive plate 422, a drive rod 423, a U-shaped frame 424, and a rotating rod 425. There are two of each of the drive block 421, drive rod 423, U-shaped frame 424, and rotating rod 425, and they are all symmetrically arranged on the worktable 1.

[0042] A second limiting telescopic column 426 is fixedly installed on the bottom wall of the working chamber 13. The other end of the second limiting telescopic column 426 is fixedly installed on the drive plate 422 to limit and guide the drive plate 422 during its lifting and lowering, thereby making the drive plate 422 more stable during lifting and lowering. The drive block 421 is threadedly connected to the bidirectional threaded rod 31. A guide groove 427 is provided on the bottom wall of the working chamber 13, and the drive block 421 is slidably installed in the guide groove 427. One end of the drive rod 423 is hinged to the drive block 421, and the other end of the drive rod 423 is hinged to the side of the drive plate 422 near the second limiting telescopic column 426. One end of the rotating rod 425 is hinged to the side of the drive plate 422 away from the second limiting telescopic column 426, and the other end of the rotating rod 425 is hinged to the U-shaped frame 424. Two moving grooves are provided on the top wall of the working chamber 13, and two U-shaped frames 424 are slidably installed in the corresponding moving grooves. Both U-shaped frames 424 have rectangular slots 428 inside, and rectangular blocks 429 are slidably installed in both rectangular slots 428. The two rectangular blocks 429 are fixedly installed on the cleaning half-ring 41.

[0043] During operation, after the pipe is clamped, the first motor 33 is started to drive the bidirectional threaded rod 31 to rotate. When the bidirectional threaded rod 31 rotates, it drives the two drive frames 32 to move closer to each other along the guide plate 34. When the drive frames 32 move, they drive the support frame 12 to slide along the moving hole 11, so that the steel pipes clamped and fixed on the rotary table 26 move closer to each other and complete the docking.

[0044] On the other hand, when the bidirectional threaded rod 31 rotates, it drives the two drive blocks 421 connected to it to move away from each other along the guide groove 427. When the two drive blocks 421 move, they drive the drive rod 423 to rotate. When the drive rod 423 rotates, it drives the drive plate 422 to start moving downward. When the drive plate 422 moves downward, it is limited and guided by the second limit telescopic column 426, making the lifting and lowering of the drive plate 422 more stable. When the drive plate 422 moves downward, it drives the rotating rod 425 to rotate. When the rotating rod 425 rotates, it drives the two U-shaped frames 424 to start moving closer to each other along the moving groove. At the same time, the U-shaped frame 424 drives the two cleaning half rings 41 to start moving closer to each other through the cooperation of the rectangular groove 428 and the rectangular block 429, so that the two cleaning half rings 41 move closer to each other and fit together, adhering to the surface of the steel pipe.

[0045] Reference Figure 2 as well as Figure 6 The rotating mechanism 5 includes a rotating shaft 51 and a second motor 52. The rotating shaft 51 is rotatably mounted on the worktable 1, and one end of the rotating shaft 51 passes through the worktable 1. The second motor 52 is fixedly mounted on the worktable 1, and the output end of the second motor 52 is fixedly connected to the rotating shaft 51 through a coupling.

[0046] Reference Figure 2as well as Figure 6 The starting component 43 is connected to the rotating shaft 51 to drive the clamped pipe to rotate, and while the pipe is rotating, it drives the cleaning half ring 41 that is mated together to move along the axial direction of the pipe.

[0047] The starting assembly 43 includes a first synchronous pulley 431, a second synchronous pulley 432, a synchronous belt 433, a starting disc 434, a threaded rod 436, and a rotating disc 435. There are two threaded rods 436 and two rotating discs 435.

[0048] The first synchronous pulley 431 is keyed to the rotating shaft 51. A rotating shaft 123 is rotatably mounted inside the support frame 12, and the second synchronous pulley 432 is fixedly mounted on the rotating shaft 123. A synchronous belt 433 is sleeved on the outside of the first synchronous pulley 431 and the second synchronous pulley 432 so that the rotating shaft 51 rotates synchronously with the rotating shaft 123. A starting cylinder 437 is fixedly mounted on one side of the first synchronous pulley 431, and the other end of the starting cylinder 437 is fixedly mounted on the starting disc 434. A second annular groove 124 is provided on the support frame 12, and a second arc-shaped plate 125 is fixedly mounted on the starting disc 434, rotatably mounted within the second annular groove 124. Two threaded rods 436 are rotatably mounted within corresponding U-shaped frames 424, and two rectangular blocks 429 are threadedly connected to the corresponding threaded rods 436. Two rotating discs 435 are fixedly mounted on the ends of the corresponding threaded rods 436, and the outer sides of the two rotating discs 435 are provided with teeth that match the starting disc 434. The two threaded rods 436 rotate in opposite directions, and because the starting disc 434 drives the two rotating discs 435 to rotate in opposite directions, the two threaded rods 436 drive the two rectangular blocks 429 to move in the same direction, which in turn makes the cleaning half-rings 41 move in the same direction. At the same time, the two cleaning half-rings 41 have brushes on the side that is close to each other, so that the pipe surface is cleaned when the two cleaning half-rings 41 move.

[0049] Reference Figure 7 A tensioning assembly 6 is provided between the two rotating disks 435. The tensioning assembly 6 is used to drive the two rotating disks 435 to move closer to each other and engage with the starting disk 434 when the two cleaning half-rings 41 approach each other, so as to drive the starting disk 434 and the rotating disk 435 to rotate when the rotating shaft 51 rotates, thereby driving the cleaning half-ring 41 to move along the axial direction of the pipeline.

[0050] The tensioning assembly 6 includes a tension sleeve 61 and a first compression spring 62. There are two tension sleeves 61, which are interlocked. The two tension sleeves 61 are rotatably mounted on corresponding rotating disks 435 and fitted onto the outside of the threaded rod 436 to prevent them from rotating synchronously with the rotating disks 435. The two ends of the first compression spring 62 are fixedly connected to the inside of the corresponding tension sleeves 61, and the first compression spring 62 drives the two rotating disks 435 to always tend to move closer together.

[0051] During operation, as the two cleaning half-rings 41 are joined together, the two tension sleeves 61 in the tension assembly 6 installed between the two rotating disks 435 are inserted and compressed into each other as the cleaning half-rings 41 approach. The first compression spring 62 drives the two tension sleeves 61 to always tend to approach each other, so that the two rotating disks 435 move synchronously with the U-shaped frame 424, making the two rotating disks 435 approach each other. When the two cleaning half-rings 41 are fully joined and attached to the pipe surface, the two rotating disks 435 are just engaged with the starting disk 434. At this time, the teeth on the outside of the rotating disk 435 mesh with the teeth on the outside of the starting disk 434.

[0052] Then, the second motor 52 is started to drive the rotating shaft 51 to rotate. When the rotating shaft 51 rotates, it drives the first synchronous pulley 431 to rotate synchronously. The first synchronous pulley 431 transmits power to the second synchronous pulley 432 through the synchronous belt 433. The second synchronous pulley 432 drives the rotating shaft 123 inside the support frame 12 to rotate. The rotating shaft 123 drives the rotating table 26 and the pipe clamped on the rotating table 26 to rotate synchronously.

[0053] Simultaneously, as the first synchronous pulley 431 rotates, the starting cylinder 437, fixedly installed on one side of the first synchronous pulley 431, drives the starting disc 434 to rotate synchronously. The starting disc 434, through the meshing of its teeth, drives two rotating discs 435 to rotate synchronously. The two rotating discs 435 drive the corresponding threaded rods 436 to rotate within the U-shaped frame 424. When the threaded rods 436 rotate, they drive the rectangular block 429, which is threadedly connected to it, to move along the rectangular groove 428. When the rectangular block 429 moves, it drives the cleaning half-ring 41, which is fixed to it, to move along the axial direction of the pipe. As the pipe rotates, the two work together to allow the brush on the inner side of the cleaning half-ring 41 to perform a spiral-shaped comprehensive cleaning of the outer wall of the pipe, thereby effectively removing dust and impurities adhering to the surface of the pipe.

[0054] Reference Figure 1 as well as Figure 8 The locking component 44 is mounted on the rectangular block 429 and is used to connect the two cleaning half-rings 41 to the welding mechanism 7 so that the welding mechanism 7 performs welding only after the two cleaning half-rings 41 have finished cleaning the pipe surface.

[0055] Reference Figure 8 as well as Figure 9 The locking assembly 44 includes a telescopic structure 448, a locking block 441, a connecting plate 442, and a locking plate 443. The telescopic structure 448 includes a rectangular sleeve 4481, a connecting block 4482, a limiting block 4483, and a second compression spring 4484.

[0056] A locking hole 444 is provided on the workbench 1. A rectangular sleeve 4481 is slidably installed in the locking hole 444, and a locking block 441 is fixedly installed on the rectangular sleeve 4481. Two limiting blocks 445 are fixedly installed on the outer side of the rectangular sleeve 4481. The sides of the two limiting blocks 445 that are close to each other abut against the inner and outer sides of the workbench 1, respectively, to limit the rectangular sleeve 4481. A connecting block 4482 is slidably installed in the rectangular sleeve 4481 and is fixedly installed on the rectangular block 429. A limiting block 4483 is slidably installed in the rectangular sleeve 4481 and is fixedly installed on the connecting block 4482. One end of a second compression spring 4484 is fixedly connected to the inner wall of the rectangular sleeve 4481, and the other end of the second compression spring 4484 is fixedly connected to the limiting block 4483. The second compression spring 4484 drives the cleaning half-ring 41 to always tend to move away from the locking block 441. The connecting plate 442 is inserted into the locking block 441 and is connected to the welding mechanism 7. The locking plate 443 is slidably installed in the locking block 441 and inserted into the connecting plate 442, thereby locking the connecting plate 442 and the locking block 441. An unlocking plate 15 for unlocking the locking plate 443 is fixedly installed on the worktable 1. The locking block 441 has a through hole 446 for the unlocking plate 15 to pass through, and the unlocking plate 15 has an unlocking surface that matches the inclined surface of the locking plate 443. A sliding groove 447 is provided in the locking block 441, and the locking plate 443 is slidably installed in the sliding groove 447. When the cleaning half-ring 41 drives the welding mechanism 7 to the welding position, the unlocking surface of the unlocking plate 15 pushes up the locking plate 443, thereby unlocking the welding mechanism 7 from the cleaning half-ring 41 so that the welding mechanism 7 can perform welding processing.

[0057] During operation, as the cleaning half-ring 41 moves axially along the pipeline, the rectangular block 429 drives the connecting block 4482 and the limiting block 4483 to move within the rectangular sleeve 4481, stretching the second compression spring 4484. This keeps the rectangular sleeve 4481 relatively fixed relative to the locking block 441, and the locking block 441 is locked to the connecting plate 442 by the locking plate 443. The connecting plate 442 is also connected to the welding mechanism 7. Therefore, during the cleaning process, the cleaning half-ring 41 moves axially along the pipeline, driving the rectangular sleeve 4481 to move along the locking hole 444, and driving the connecting plate 442 and the welding mechanism 7 to move along the locking hole 444, so that the welding mechanism 7 moves together with the cleaning half-ring 41 towards the pipeline connection point. When the cleaning half-ring 41 moves axially along the pipe and exits the pipe joint, and the welding mechanism 7 moves to the pipe joint, the dust and impurities on the pipe surface are cleaned. The locking block 441 moves with the cleaning half-ring 41 to the position of the unlocking plate 15 fixedly installed on the workbench 1. The unlocking plate 15 passes through the through hole 446 in the locking block 441 and enters the interior of the locking block 441. The unlocking surface on the unlocking plate 15 abuts against the inclined surface on the locking plate 443. As the locking block 441 continues to move with the cleaning half-ring 41, the unlocking surface, in cooperation with the inclined surface, pushes the locking plate 443 upward along the sliding groove 447. The locking plate 443 disengages from the connecting plate 442, and the locking relationship between the connecting plate 442 and the locking block 441 is released. At this point, the welding mechanism 7 separates from the cleaning half-ring 41, remaining at the pipe joint for welding. The cleaning half-ring 41 continues to move forward, causing the pipe to rotate continuously, thus avoiding affecting the welding effect of the welding mechanism 7.

[0058] Reference Figure 1 as well as Figure 10 The welding mechanism 7 includes a gantry 71, a lifting plate 72, a laser welding gun 73, and a hydraulic cylinder 74.

[0059] A sliding groove 75 is provided on the workbench 1, and a rectangular block 76 is slidably connected within the sliding groove 75. The rectangular block 76 is fixedly mounted on the gantry frame 71. A hydraulic cylinder 74 is fixedly mounted on the gantry frame 71, and its output end is fixedly mounted on a lifting plate 72. A first limiting telescopic column 77 is fixedly mounted on the side of the lifting plate 72 closest to the gantry frame 71, and the other end of the first limiting telescopic column 77 is fixedly mounted on the gantry frame 71. A laser welding gun 73 is fixedly mounted on the lifting plate 72 for welding pipe joints. The laser welding gun 73 is a conventional technique used by those skilled in the art and will not be described in detail here.

[0060] During operation, when the welding mechanism 7 moves to the pipe joint, the hydraulic cylinder 74 is activated, driving the lifting plate 72 to descend. During this descent, the first limiting telescopic column 77 provides guidance, ensuring the lifting plate 72 moves smoothly vertically and preventing skewing. The laser welding gun 73, fixedly mounted on the lifting plate 72, descends synchronously with it to the pipe joint. At this point, the laser welding gun 73 is activated to perform laser welding on the joint of the two steel pipe sections. The pipe continues to rotate, allowing the laser welding gun 73 to perform continuous circumferential welding along the pipe's circumference, forming a complete and uniform weld. During welding, because the pipe surface has undergone a comprehensive spiral cleaning by the cleaning half-ring 41 before welding, dust and impurities adhering to the pipe's outer wall have been effectively removed, thus preventing defects such as porosity in the weld due to impurities and ensuring the weld's density and quality.

[0061] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A laser welding equipment for large-scale engineering steel pipes, comprising a worktable (1), a clamping mechanism (2) symmetrically arranged on the worktable (1) for clamping and fixing pipes, a moving docking mechanism (3) for docking two clamped pipes together, a rotating mechanism (5) for driving the docked pipes to rotate synchronously, and a welding mechanism (7) for welding two pipes together, characterized in that, It also includes a cleaning mechanism (4) for cleaning the surface of the pipe; the movable docking mechanism (3) includes a bidirectional threaded rod (31) rotatably mounted on the worktable (1); the rotating mechanism (5) includes a rotating shaft (51) rotatably mounted on the worktable (1). The cleaning mechanism (4) includes cleaning half-rings (41) symmetrically arranged on the workbench (1), a drive assembly (42) connected to the bidirectional threaded rod (31) and used to drive the two cleaning half-rings (41) to abut against the pipe surface, a starting assembly (43) connected to the rotating shaft (51) and used to drive the two cleaning half-rings (41) to move along the pipe axis, and a locking assembly (44). The locking component (44) is used to connect the two cleaning half-rings (41) to the welding mechanism (7) so that the welding mechanism (7) will perform welding after the two cleaning half-rings (41) have finished cleaning the pipe surface.

2. The laser welding equipment for large-scale engineering steel pipes according to claim 1, characterized in that, The drive assembly (42) includes two drive blocks (421) threaded onto the bidirectional threaded rod (31), a drive plate (422) mounted vertically inside the worktable (1), a drive rod (423) hinged between the drive blocks (421) and the drive plate (422), a U-shaped frame (424) slidably mounted on the worktable (1), and a rotating rod (425) hinged between the U-shaped frame (424) and the drive plate (422). The number of the U-shaped frame (424) is two and they are symmetrically arranged on the workbench (1). The two cleaning half rings (41) are slidably installed in the corresponding U-shaped frame (424). When the bidirectional threaded rod (31) rotates, it drives the two cleaning half rings (41) to approach each other and fit against the surface of the pipe.

3. The laser welding equipment for large-scale engineering steel pipes according to claim 2, characterized in that, A support frame (12) is slidably mounted on the workbench (1), and the clamping mechanism (2) is rotatably mounted on the support frame (12). A rotating shaft (123) connected to the starting component (43) is mounted on the support frame (12) to drive the clamping mechanism (2) to rotate. The starting assembly (43) includes a first synchronous pulley (431) keyed to the rotating shaft (51), a second synchronous pulley (432) mounted on the rotating shaft (123), a synchronous belt (433) for driving the first synchronous pulley (431) and the second synchronous pulley (432) to rotate synchronously, a starting disc (434) mounted on the first synchronous pulley (431), two threaded rods (436) threadedly connected to the two cleaning half-rings (41), and two rotating discs (435) mounted on the two threaded rods (436).

4. The laser welding equipment for large-scale engineering steel pipes according to claim 3, characterized in that, A tensioning assembly (6) is provided between the two rotating disks (435). The tensioning assembly (6) is used to drive the two rotating disks (435) to move closer to each other and engage with the starting disk (434) when the two cleaning half-rings (41) move closer to each other. When the rotating shaft (51) rotates, it drives the starting disk (434) and the rotating disks (435) to rotate, thereby driving the cleaning half-rings (41) to move along the axial direction of the pipe. The tensioning assembly (6) includes two tensioning sleeves (61) rotatably mounted on the two rotating disks (435) and a first compression spring (62) mounted between the two tensioning sleeves (61); the first compression spring (62) drives the two rotating disks (435) to always tend to move closer to each other.

5. The laser welding equipment for large-scale engineering steel pipes according to claim 1, characterized in that, The locking assembly (44) includes a telescopic structure (448) that is slidably mounted on the workbench (1) and mounted on the cleaning half ring (41), a locking block (441) mounted on the telescopic structure (448), a connecting plate (442) inserted into the locking block (441) and connected to the welding mechanism (7), and a locking plate (443) that is slidably mounted in the locking block (441) to lock the connecting plate (442). The locking plate (443) has an inclined surface; when the cleaning half ring (41) moves, the locking plate (443) locks the connecting plate (442) and the locking block (441) together, causing the welding mechanism (7) to move synchronously with the cleaning half ring (41).

6. The laser welding equipment for large-scale engineering steel pipes according to claim 5, characterized in that, The workbench (1) is equipped with an unlocking plate (15) for unlocking the locking plate (443). The locking block (441) has a through hole (446) for the unlocking plate (15) to pass through. The unlocking plate (15) has an unlocking surface that matches the inclined surface of the locking plate (443). The locking block (441) has a sliding groove (447) and the locking plate (443) is slidably installed in the sliding groove (447). When the cleaning half ring (41) drives the welding mechanism (7) to the welding position, the unlocking surface of the unlocking plate (15) pushes up the locking plate (443) to unlock the welding mechanism (7) from the cleaning half ring (41) so that the welding mechanism (7) can perform welding.

7. The laser welding equipment for large-scale engineering steel pipes according to claim 5, characterized in that, The telescopic structure (448) includes a rectangular sleeve (4481) slidably mounted on the workbench (1) and mounted on the locking block (441), a connecting block (4482) slidably mounted inside the rectangular sleeve (4481) and mounted on the cleaning half ring (41), a limiting block (4483) mounted on the connecting block (4482) and slidably mounted inside the rectangular sleeve (4481), and a second compression spring (4484) mounted between the limiting block (4483) and the rectangular sleeve (4481). The second compression spring (4484) drives the cleaning half-ring (41) to always tend to move away from the locking block (441).

8. A laser welding equipment for large-scale engineering steel pipes according to claim 6, characterized in that, The welding mechanism (7) includes a gantry (71) that slides on the workbench (1), a lifting plate (72) that lifts on the gantry (71), a laser welding gun (73) that is mounted on the lifting plate (72) and used for welding the pipe, and a hydraulic cylinder (74) that is mounted on the gantry (71) and used to drive the laser welding gun (73) closer to the pipe. The connecting plate (442) is installed on the gantry (71), and a first limiting telescopic column (77) is installed on the lifting plate (72). The other end of the first limiting telescopic column (77) is installed on the gantry (71) to limit and guide the laser welding gun (73) when it is raised and lowered.

9. A laser welding equipment for large-scale engineering steel pipes according to claim 3, characterized in that, The moving docking mechanism (3) further includes a drive frame (32) mounted on the support frame (12) and threadedly connected to the bidirectional threaded rod (31), and a first motor (33) mounted on the worktable (1) for driving the bidirectional threaded rod (31) to rotate; the rotating mechanism (5) further includes a second motor (52) mounted on the worktable (1) for driving the rotating shaft (51) to rotate. The workbench (1) is equipped with a guide plate (34), and the drive frame (32) is slidably sleeved on the guide plate (34) to make the drive frame (32) move more stably when the pipe is connected.

10. A laser welding equipment for large-scale engineering steel pipes according to claim 3, characterized in that, The clamping mechanism (2) includes a rotary table (26) rotatably mounted on the support frame (12), a clamping plate (21) slidably mounted on the rotary table (26) for clamping the pipe, a rotating disk (22) mounted inside the rotary table (26), a first connecting rod (23) hinged to the rotating disk (22), a second connecting rod (24) hinged between the first connecting rod (23) and the clamping plate (21), and a third motor (25) mounted inside the rotary table (26) for driving the rotating disk (22) to rotate.

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