A welding device for offshore wind power pipe piles

Abstract

The present application relates to the field of wind power pipe pile welding, disclose a kind of welding device for offshore wind power pipe pile, including fixed plate and first fixed ring, two blocks The fixed plate is provided with first fixed ring on the circumferential side, the first fixed ring is provided with moving structure, rotating structure is provided between the two fixed plates, the left The fixed plate is connected to two groups of connecting plates, one end of the connecting plate is installed third fixed ring, the welding device can be pushed to the welding position of the inner wall of the two wind power pipe piles to be welded by moving structure, the device is fixed and clamped on the inner wall of the wind power pipe pile using the fixed and clamped structure, and the welding structure is driven to rotate by driving structure, rotating structure, and then welding work is carried out at each position from the inside of the wind power pipe pile, so welding work can be carried out without lifting the wind power pipe pile, not only lower welding cost, operation is more labor-saving, convenient, improve the welding work efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine pipe pile welding, and in particular to a welding device for offshore wind turbine pipe piles. Background Technology

[0002] Offshore wind turbine piles are an important component in the construction of offshore wind farms, mainly used to support and fix wind turbine units. Piles are usually made of high-strength steel, with excellent corrosion resistance and durability, and can adapt to complex marine environmental conditions, effectively coping with natural factors such as strong winds, waves and tides. Welding equipment is required when welding wind turbine piles.

[0003] In existing welding devices, the wind turbine steel pipe piles to be welded are first placed on a transport vehicle, which rotates the steel pipes. Then, the electric telescopic rod is opened, and its retraction motion causes the moving block to move downwards. The moving block causes a triangular plate to rotate around its right-angled end, and the triangular plate can slide slightly left and right within the moving block via a small cylinder. The moving block causes the triangular plate to rotate, which in turn causes the moving seat to rotate. The acute-angled end of the triangular plate can slide slightly up and down within the moving seat via a small cylinder, thereby causing the sliding block to slide on the sliding rod. The sliding block causes the L-shaped fixed rod to move, and the L-shaped fixed rod causes the welding assembly to move, thus enabling the welding of the steel pipe piles on the transport vehicle.

[0004] However, in actual operation, the wind turbine piles need to be moved onto transport vehicles. Due to their large size and heavy weight, they need to be moved using handling equipment, which not only increases welding costs but also makes welding more complicated. Therefore, there are areas for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a welding device for offshore wind power pipe piles.

[0006] The welding device for offshore wind turbine pipe piles provided by this invention adopts the following technical solution:

[0007] A welding device for offshore wind power pipe piles includes a fixing plate and a first fixing ring. The first fixing ring is provided on the periphery of both fixing plates. The first fixing ring is provided with a moving structure. A rotating structure is provided between the two fixing plates. Two sets of connecting plates are connected to the left fixing plate. A third fixing ring is installed at one end of the connecting plate. The third fixing ring is provided with a folding structure.

[0008] The rotating structure includes two rotating disks rotatably mounted on two fixed plates on their adjacent sides. A fixed disk is installed at the middle of the two rotating disks on their adjacent sides. A connecting cylinder is fixedly connected between the two fixed disks. A welding structure is provided on the connecting cylinder. A driving structure is provided on one of the fixed plates. A limit polishing structure is provided on the side of the fixed disk. A pushing structure is provided on the connecting cylinder.

[0009] The welding structure includes an intermediate sleeve fitted in the middle of the connecting cylinder, two connecting rods connected to the intermediate sleeve, a second fixing ring installed at one end of the connecting rods, and multiple welding guns arranged on the second fixing ring, with the multiple welding guns distributed at equal angles around the circumference of the second fixing ring.

[0010] The movable structure includes two sets of fixing frames disposed on the side edges of the two first fixing rings. Multiple fixing frames in each set are distributed at equal angles around the first fixing ring. Fixing rods are connected to two corners on the side of the fixing frame away from the first fixing ring. A universal wheel is installed at one end of each fixing rod. A clamping fixing structure is provided on the fixing frame.

[0011] Preferably, the clamping and fixing structure includes a through plate that moves through the fixing frame. The through plate is radially distributed along the first fixing ring. A clamping plate is installed at the end of the through plate away from the axis of the first fixing ring. The clamping plate is an arc-shaped plate. A pull-out structure is provided at the middle of the side of the two fixing plates that are away from each other.

[0012] Preferably, the pull-out structure includes a cylinder installed at the middle of the side of the fixed plate away from the second fixed ring, a first driving ring installed at one end of the cylinder output shaft, a pull-out plate connected to the end of the through plate near the cylinder, and a pull-out groove formed on the pull-out plate, through which the first driving ring moves.

[0013] Preferably, the drive structure includes a mounting plate connected to the right fixed plate, a first motor is mounted on the mounting plate, and a groove is provided in the middle of the side of the right rotating disk near the fixed plate. A first gear is fixedly sleeved on one end of the first motor output shaft inserted into the groove, and the first gear meshes with the teeth on the groove wall.

[0014] Preferably, the limiting polishing structure includes multiple radial plates connected to the side of the fixed disk. A radial groove is formed on the side of the radial plate away from the rotating disk. A movable block is slidably disposed in the radial groove. A movable plate is connected to the movable block. A top groove is formed at the end of the movable plate away from the movable block. An adjusting block is slidably disposed in the top groove. One end of the adjusting block protrudes from the movable plate and is connected to a U-shaped seat. A polishing wheel is disposed inside the U-shaped seat. A second motor is mounted on one side of the U-shaped seat. One end of the output shaft of the second motor is connected to the polishing wheel. An electric telescopic rod is mounted at one end of the movable plate. One end of the output shaft of the electric telescopic rod is connected to the adjusting block.

[0015] Preferably, the pushing structure includes a bidirectional motor installed in the middle of the inner wall of the connecting cylinder. Both output ends of the bidirectional motor are connected to screws with opposite thread directions. Each screw is fitted with a movable disc with a threaded groove. The connecting cylinder has a guide groove for the movable disc to pass through. Movable sleeves are interlocked near both ends of the connecting cylinder. The movable disc is connected to the movable sleeve. A crank is rotatably connected to each radial plate on the side of the movable sleeve. One end of the crank is rotatably connected to the movable block.

[0016] Preferably, the folding structure includes two fixing blocks disposed on the side away from the fixing plate, each fixing block having a rotating shaft passing through it, a folding frame fixedly sleeved at the middle of the rotating shaft, a threaded rod passing through the lower end of the folding frame away from the fixing block, a folding plate movably sleeved on the threaded rod, a rotating block sleeved on the bottom end of the threaded rod, a cleaning structure disposed at one end of the folding plate, and a positioning structure disposed on the folding frame.

[0017] Preferably, the cleaning structure includes a fourth fixed ring rotatably mounted on one end of the folding plate, a rotating ring rotatably disposed on the outer surface of the fourth fixed ring, the rotating ring having a hollow interior, multiple air jet pipes connected to the side of the rotating ring, an air jet head mounted on one end of each air jet pipe, an air pump mounted on the side of the rotating ring, a second driving ring disposed on one side edge of the inner wall of the rotating ring, a third motor disposed on the other side edge of the inner wall of the fourth fixed ring, a second gear fixedly sleeved on one end of the output shaft of the third motor, and the second gear meshing with the teeth on the inner wall of the second driving ring.

[0018] Preferably, the positioning structure includes a storage frame fixedly passing through the top of the folding frame at the end away from the fixed block, the first positioning block movably passing through the storage frame, the end faces of the first positioning block and the storage frame being square-shaped, a first positioning groove being formed on the top of the folding plate near the folding frame, the first positioning block being movably inserted into the first positioning groove, the top end of the threaded rod being rotatably inserted into the threaded groove formed at the bottom end face of the first positioning block, a connecting strip being connected to the top end of the side of the first positioning block, a second positioning block being installed at one end of the connecting strip, and the second positioning block being movably inserted into the second positioning groove formed at the top end face of the rotating shaft.

[0019] In summary, the present invention has the following beneficial technical effects:

[0020] 1. This invention, by setting up a moving structure, a welding structure, a rotating structure, a clamping and fixing structure, and a driving structure, allows the welding device to be pushed to the welding position on the inner wall of two wind turbine piles to be welded through the moving structure. The clamping and fixing structure clamps and fixes the device on the inner wall of the wind turbine piles. The driving and rotating structures drive the welding structure to rotate, thereby performing welding work at various positions from inside the wind turbine piles. This eliminates the need to lift the wind turbine piles to perform welding work, resulting in lower welding costs, more labor-saving and convenient operation, and improved welding efficiency.

[0021] 2. By setting up a limiting polishing structure and a pushing structure, when the device is pressed and fixed inside the wind power pipe pile, the pushing structure can drive the polishing wheel on the limiting polishing structure to press against the inner wall of the two wind power pipe piles. This not only plays a certain limiting role between the two adjacent wind power pipe piles to be welded, but also rotates synchronously with the welding structure, polishing the welding area with the polishing wheel, thereby improving the quality of the welding work.

[0022] 3. By setting up a cleaning structure, a folding structure, and a positioning structure, this invention allows for automatic cleaning when the device is removed from the wind turbine pile after welding. The cleaning structure blows out the debris generated during welding and polishing inside the wind turbine pile. The folding structure allows the cleaning structure to be folded and stored on the third fixing ring, reducing the space occupied and facilitating storage. The positioning structure allows the folding structure to be positioned after the cleaning structure is unfolded from the third fixing ring, expanding the cleaning space and making the debris cleaning more thorough. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a welding device for offshore wind power pipe piles in an embodiment of the present invention;

[0024] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of the structure at point A;

[0025] Figure 3 This is a schematic diagram of the structure of one set of fixing plates and the first fixing ring in one embodiment of the present invention;

[0026] Figure 4 This is an embodiment of the present invention. Figure 3 Enlarged view of the structure at point B;

[0027] Figure 5 This is an embodiment of the present invention. Figure 3 Enlarged view of the structure at point C;

[0028] Figure 6 This is a schematic diagram of the left side of a welding device for offshore wind power pipe piles in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the folding structure and the cleaning structure in an embodiment of the present invention;

[0030] Figure 8 This is an embodiment of the present invention. Figure 7 Enlarged view of the structure at point D;

[0031] Figure 9 This is an embodiment of the present invention. Figure 7 Enlarged view of the structure at point E.

[0032] Explanation of reference numerals in the attached drawings: 1. Fixing plate; 2. First fixing ring; 3. Rotating disk; 4. Connecting cylinder; 5. Fixing disk; 6. Intermediate sleeve; 7. Connecting rod; 8. Second fixing ring; 9. Welding torch; 10. Fixing frame; 11. Fixing rod; 12. Caster wheel; 13. Through plate; 14. Abutting plate; 15. Cylinder; 16. First driving ring; 17. Pull-out plate; 18. Pull-out groove; 19. Mounting plate; 20. First motor; 21. First gear; 22. Groove; 23. Radial plate; 24. Moving block; 25. Radial groove; 26. Moving plate; 27. Electric telescopic rod; 28. Top groove; 29. ​​Adjusting block; 30. U-shaped seat; 3 1. Second motor; 32. Polishing wheel; 33. Screw; 34. Moving disc; 35. Guide groove; 36. Moving sleeve; 37. Crank rod; 38. Connecting plate; 39. Third fixing ring; 40. Fourth fixing ring; 41. Rotating ring; 42. Air jet pipe; 43. Air jet head; 44. Air pump; 45. Third motor; 46. Second gear; 47. Second driving ring; 48. Fixing block; 49. Rotating shaft; 50. Folding frame; 51. Threaded rod; 52. Rotating block; 53. Folding plate; 54. Storage frame; 55. First positioning block; 56. First positioning groove; 57. Connecting strip; 58. Second positioning block; 59. Second positioning groove. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0034] Reference Figures 1-9 This invention discloses a welding device for offshore wind power pipe piles, including a fixing plate 1 and a first fixing ring 2. The first fixing ring 2 is provided on the upper side of both fixing plates 1. The first fixing ring 2 is provided with a moving structure. A rotating structure is provided between the two fixing plates 1. Two sets of connecting plates 38 are connected to the left fixing plate 1. A third fixing ring 39 is installed at one end of the connecting plate 38. The third fixing ring 39 is provided with a folding structure.

[0035] The rotating structure includes two rotating disks 3 rotatably mounted on two fixed plates 1 on one side close to each other. Fixed disks 5 are installed at the middle of the two rotating disks 3 on one side close to each other. A connecting cylinder 4 is fixedly connected between the two fixed disks 5. A welding structure is provided on the connecting cylinder 4. A driving structure is provided on one of the fixed plates 1. A limit polishing structure is provided on the side of the fixed disk 5. A pushing structure is provided on the connecting cylinder 4.

[0036] The welding structure includes an intermediate sleeve 6 fitted in the middle of the connecting cylinder 4, two connecting rods 7 connected to the intermediate sleeve 6, a second fixing ring 8 installed at one end of the connecting rod 7, and multiple welding guns 9 set on the second fixing ring 8, with the multiple welding guns 9 distributed at equal angles around the circumference of the second fixing ring 8.

[0037] The movable structure includes two sets of fixed frames 10 disposed on the side edges of the two first fixed rings 2. Multiple fixed frames 10 in each set are distributed at equal angles around the first fixed ring 2. Fixed rods 11 are connected to two corners on the side away from the first fixed ring 2. A universal wheel 12 is installed at one end of the fixed rod 11. A clamping and fixing structure is provided on the fixed frame 10.

[0038] The clamping and fixing structure includes a through plate 13 that moves through the fixing frame 10. The through plate 13 is distributed radially along the first fixing ring 2. A clamping plate 14 is installed at the end of the through plate 13 away from the axis of the first fixing ring 2. The clamping plate 14 is an arc-shaped plate. A pull-out structure is provided at the middle of the two fixing plates 1 on opposite sides.

[0039] The pull-out structure includes a cylinder 15 installed in the middle of the side of the fixed plate 1 away from the second fixed ring 8. A first driving ring 16 is installed at one end of the output shaft of the cylinder 15. A pull-out plate 17 is connected to the end of the through plate 13 near the cylinder 15. A pull-out groove 18 is opened on the pull-out plate 17. The first driving ring 16 moves through the pull-out groove 18.

[0040] The drive structure includes a mounting plate 19 connected to the right fixed plate 1, on which a first motor 20 is mounted. A groove 22 is formed in the middle of the side of the right rotating disk 3 near the fixed plate 1. A first gear 21 is fixedly sleeved on one end of the output shaft of the first motor 20 inserted into the groove 22. The first gear 21 meshes with the teeth on the groove wall of the groove 22. When welding two wind turbine piles on the ground, the device can be directly pushed into the wind turbine pile. Using the universal wheels 12 rolling on the inner wall of the wind turbine pile, the device is moved to the welding position on the wind turbine pile. Thus, the two first fixing rings 2 are respectively positioned on the inner walls of the two wind turbine piles. After adjustment, the welding... After the gun 9 is positioned, the starting cylinder 15 drives the first driving ring 16 to move closer to the first fixing ring 2 in the pull-out groove 18 of the pull-out plate 17. The first driving ring 16 squeezes the groove wall of the pull-out groove 18 on the pull-out plate 17, pushing the through plate 13 to move the pressing plate 14 away from the cylinder 15. The pressing plate 14 presses against the inner wall of the wind turbine pile, fixing the device to the inner wall of the wind turbine pile. Then, the first motor 20 on the mounting plate 19 can be started to drive the first gear 21 to rotate, thereby driving the rotating disk 3 and the connecting cylinder 4 to rotate as a whole, thereby driving the welding gun 9 on the second fixing ring 8 to perform welding work on various positions on the inner wall of the wind turbine pile.

[0041] See Figures 1-5 The limiting polishing structure includes multiple radial plates 23 connected to the side of the fixed disk 5. Radial grooves 25 are opened on the side of the radial plates 23 away from the rotating disk 3. A moving block 24 is slidably arranged in the radial grooves 25. A moving plate 26 is connected to the moving block 24. A top groove 28 is opened at the end of the moving plate 26 away from the moving block 24. An adjusting block 29 is slidably arranged in the top groove 28. One end of the adjusting block 29 protrudes from the moving plate 26 and is connected to a U-shaped seat 30. A polishing wheel 32 is arranged inside the U-shaped seat 30. A second motor 31 is installed on one side of the U-shaped seat 30. One end of the output shaft of the second motor 31 is connected to the polishing wheel 32. An electric telescopic rod 27 is installed at one end of the moving plate 26. One end of the output shaft of the electric telescopic rod 27 is connected to the adjusting block 29.

[0042] The driving structure includes a bidirectional motor installed in the middle of the inner wall of the connecting cylinder 4. Both output ends of the bidirectional motor are connected to screws 33, with opposite thread directions on the two screws 33. Each screw 33 is fitted with a movable disc 34, which has a threaded groove. The connecting cylinder 4 has a guide groove 35 for the movable discs 34 to pass through. Movable sleeves 36 are interlocked near both ends of the connecting cylinder 4, connecting the movable discs 34 and the movable sleeves 36. A crank rod 37 is rotatably connected to the side of each radial plate 23 corresponding to the movable sleeve 36. One end of the crank rod 37 is rotatably connected to a movable block 24. Before welding, the bidirectional motor inside the connecting cylinder 4 is started, driving the two screws 33 to rotate. The two movable discs 34 drive the corresponding movable sleeves 36 to move synchronously in opposite directions. The moving block 24 is pushed by the crank 37 to move away from the fixed plate 5 in the radial groove 25. As the moving block 24 moves the moving plate 26, the electric telescopic rod 27 and the second motor 31 are activated. The electric telescopic rod 27 moves the U-shaped seat 30 and the polishing wheel 32 towards the side closer to the welding gun 9 at one end of the moving plate 26. The second motor 31 drives the polishing wheel 32 to rotate. As the moving plate 26 moves, the rotating polishing wheel 32 can be moved to fit close to the position of the two wind turbine piles to be welded. This not only limits the two spliced ​​wind turbine piles, but also polishes the weld joint of the wind turbine piles with the polishing wheel 32 as the connecting cylinder 4 rotates, thereby improving the quality of the welding work.

[0043] See Figures 6-9 The folding structure includes two fixed blocks 48 on the side away from the fixed plate 1. A rotating shaft 49 is rotatably passed through each fixed block 48. A folding frame 50 is fixedly sleeved in the middle of the rotating shaft 49. A threaded rod 51 is rotatably passed through the lower end of the folding frame 50 away from the fixed block 48. A folding plate 53 is movably sleeved on the threaded rod 51. A rotating block 52 is sleeved on the bottom end of the threaded rod 51. A cleaning structure is provided at one end of the folding plate 53. A positioning structure is provided on the folding frame 50.

[0044] The cleaning structure includes a fourth fixed ring 40 rotatably mounted on one end of the folding plate 53. A rotating ring 41 is rotatably mounted on the outer surface of the fourth fixed ring 40. The rotating ring 41 has a hollow interior. Multiple jet pipes 42 are connected to the side of the rotating ring 41. A jet head 43 is installed at one end of the jet pipe 42. An air pump 44 is installed on the side of the rotating ring 41. A second driving ring 47 is set at one edge of the inner wall of the rotating ring 41. A third motor 45 is installed at the other edge of the inner wall of the fourth fixed ring 40. A second gear 46 is fixedly sleeved on one end of the output shaft of the third motor 45. The second gear 46 is meshed with the teeth on the inner wall of the second driving ring 47.

[0045] The positioning structure includes a storage frame 54 fixed at the end of the folding frame 50 away from the fixed block 48, a first positioning block 55 movably passing through the storage frame 54, and both the end faces of the first positioning block 55 and the storage frame 54 are square-shaped. A first positioning groove 56 is formed on the top of the folding plate 53 near the end of the folding frame 50, and the first positioning block 55 is movably inserted into the first positioning groove 56. The top end of the threaded rod 51 is rotatably inserted into the threaded groove formed at the bottom end face of the first positioning block 55. A connecting strip 57 is connected to the top end of the side of the first positioning block 55, and a second positioning block 58 is installed at one end of the connecting strip 57. The second positioning block 58 is movably inserted into the second positioning groove 59 formed at the top surface of the rotating shaft 49. Before welding, the fourth fixing ring 40 is pulled apart from the third fixing ring 39, and the folding frame 50 and the folding plate 53 are stretched to be on the same straight line. The threaded rod 51 is rotated on the folding frame 50 by the rotating block 52. The first positioning block 55 moves on the rotating threaded rod 51 and is inserted into the first positioning groove 56 on the folding plate 53 to position the connection between the folding frame 50 and the folding plate 53. During the movement of the first positioning block 55, the connecting strip 57 drives the second positioning block 58 to be inserted into the second positioning groove 59 at the top of the rotating shaft 49, and the folding frame 50 is positioned on the third fixing ring 39. This can also position the pulled-out fourth fixing ring 40. After the welding work is completed, the air pump 44 on the rotating ring 41 is started, and the air jet head 43 sprays air towards the inner wall of the wind turbine pile. During the process of removing the device from the wind turbine pile, the debris generated during the welding and polishing process can be cleaned out of the wind turbine pile, improving the work quality.

[0046] The implementation principle of a welding device for offshore wind turbine piles according to an embodiment of the present invention is as follows: First, the fourth fixing ring 40 is pulled open on the third fixing ring 39, and the folding frame 50 and the folding plate 53 are stretched to be on the same straight line. At this time, the threaded rod 51 is rotated on the folding frame 50 by the rotating block 52, and the first positioning block 55 moves on the rotating threaded rod 51. The first positioning block 55 is inserted into the first positioning groove 56 on the folding plate 53 to position the connection between the folding frame 50 and the folding plate 53. During the movement of the first positioning block 55, the second positioning block 58 is driven to insert into the rotating threaded rod 51 by the connecting strip 57. In the second positioning groove 59 at the top of shaft 49, the folding frame 50 is positioned on the third fixing ring 39, thereby positioning the pulled-out fourth fixing ring 40. Then, using the universal wheel 12 rolling on the inner wall of the wind turbine pile, the device is moved to the position to be welded on the wind turbine pile. In this way, the two first fixing rings 2 are respectively located on the inner walls of the two wind turbine piles. After the position of the welding gun 9 is adjusted, the cylinder 15 is started to drive the first driving ring 16 to move towards the first fixing ring 2 in the pull groove 18 of the pull plate 17. The first driving ring 16 is used to fix the groove wall of the pull groove 18 on the pull plate 17. The compression pushes the through plate 13, causing the clamping plate 14 to move away from the cylinder 15. The clamping plate 14 then presses against the inner wall of the wind turbine pile, fixing the device to the inner wall. Next, the electric telescopic rod 27 and the second motor 31 are activated. The electric telescopic rod 27, at one end of the moving plate 26, moves the U-shaped seat 30 and the polishing wheel 32 towards the side closer to the welding gun 9. The second motor 31 drives the polishing wheel 32 to rotate. Thus, as the moving plate 26 moves, the rotating polishing wheel 32 moves and presses against the position of the two wind turbine piles to be welded. Then, the first... Motor 20 drives the first gear 21 to rotate, which in turn drives the rotating disk 3 and the connecting cylinder 4 to rotate as a whole. This causes the welding gun 9 on the second fixed ring 8 to perform welding work on various positions on the inner wall of the wind turbine pile, and also drives the polishing wheel 32 to polish the welded parts of the wind turbine pile, thereby improving the quality of the welding work. After welding, the air pump 44 on the rotating ring 41 is started, and the air jet head 43 sprays air towards the inner wall of the wind turbine pile. In this way, when the device is removed from the inside of the wind turbine pile, the debris generated during the welding and polishing process can be carried out from the inside of the wind turbine pile, cleaning the wind turbine pile and improving the quality of the work.

[0047] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding device for offshore wind turbine piles, comprising a fixing plate (1) and a first fixing ring (2), characterized in that: Both of the two fixing plates (1) are provided with a first fixing ring (2) on their upper sides. The first fixing ring (2) is provided with a moving structure. A rotating structure is provided between the two fixing plates (1). Two sets of connecting plates (38) are connected to the fixing plate (1) on the left side. A third fixing ring (39) is installed at one end of the connecting plate (38). A folding structure is provided on the third fixing ring (39). The rotating structure includes two rotating disks (3) rotatably mounted on two fixed plates (1) on one side close to each other. A fixed disk (5) is installed at the middle of the two rotating disks (3) on one side close to each other. A connecting cylinder (4) is fixedly connected between the two fixed disks (5). A welding structure is provided on the connecting cylinder (4). A driving structure is provided on one of the fixed plates (1). A limit polishing structure is provided on the side of the fixed disk (5). A pushing structure is provided on the connecting cylinder (4). The welding structure includes an intermediate sleeve (6) fitted on the middle of the connecting cylinder (4), two connecting rods (7) connected on the intermediate sleeve (6), a second fixing ring (8) installed at one end of the connecting rod (7), and multiple welding guns (9) arranged on the second fixing ring (8), with the multiple welding guns (9) distributed at equal angles around the circumference of the second fixing ring (8). The movable structure includes two sets of fixed frames (10) set at the side edges of the two first fixed rings (2). Multiple fixed frames (10) in each set are distributed at equal angles around the first fixed ring (2). Fixed rods (11) are connected to two corners on the side away from the first fixed ring (2). One end of the fixed rod (11) is equipped with a caster wheel (12). A clamping and fixing structure is provided on the fixed frame (10). The limiting polishing structure includes multiple radial plates (23) connected to the side of the fixed disk (5). The radial plates (23) have radial grooves (25) on the side away from the rotating disk (3). A moving block (24) is slidably arranged in the radial grooves (25). A moving plate (26) is connected to the moving block (24). A top groove (28) is opened at the end of the moving plate (26) away from the moving block (24). An adjusting block (29) is slidably arranged in the top groove (28). One end of the adjusting block (29) protrudes from the moving plate (26) and is connected to a U-shaped seat (30). A polishing wheel (32) is arranged inside the U-shaped seat (30). A second motor (31) is installed on one side of the U-shaped seat (30). One end of the output shaft of the second motor (31) is connected to the polishing wheel (32). An electric telescopic rod (27) is installed at one end of the moving plate (26). One end of the output shaft of the electric telescopic rod (27) is connected to the adjusting block (29). The folding structure includes two fixed blocks (48) on the side away from the fixed plate (1). Each fixed block (48) has a rotating shaft (49) that passes through it. A folding frame (50) is fixedly fitted in the middle of the rotating shaft (49). A threaded rod (51) passes through the bottom of the folding frame (50) away from the fixed block (48). A folding plate (53) is movably fitted on the threaded rod (51). A rotating block (52) is fitted on the bottom end of the threaded rod (51). A cleaning structure is provided at one end of the folding plate (53). A positioning structure is provided on the folding frame (50). The cleaning structure includes a fourth fixed ring (40) rotatably mounted on one end of a folding plate (53). A rotating ring (41) is rotatably mounted on the outer surface of the fourth fixed ring (40). The rotating ring (41) has a hollow interior. Multiple jet pipes (42) are connected to the side of the rotating ring (41). A jet head (43) is installed at one end of the jet pipe (42). An air pump (44) is installed on the side of the rotating ring (41). A second driving ring (47) is set at one edge of the inner wall of the rotating ring (41). A third motor (45) is installed at the other edge of the inner wall of the fourth fixed ring (40). A second gear (46) is fixedly sleeved on one end of the output shaft of the third motor (45). The second gear (46) meshes with the teeth on the inner wall of the second driving ring (47). The positioning structure includes a storage frame (54) fixed at the end of the folding frame (50) away from the fixed block (48), a first positioning block (55) movably passing through the storage frame (54), the end faces of the first positioning block (55) and the storage frame (54) are both square, a first positioning groove (56) is opened on the top of the folding plate (53) near the end of the folding frame (50), the first positioning block (55) is movably inserted into the first positioning groove (56), the top end of the threaded rod (51) is rotatably inserted into the threaded groove opened at the bottom end face of the first positioning block (55), a connecting strip (57) is connected to the top end of the side of the first positioning block (55), a second positioning block (58) is installed at one end of the connecting strip (57), and the second positioning block (58) is movably inserted into the second positioning groove (59) opened on the top surface of the rotating shaft (49).

2. The welding device for offshore wind turbine pipe piles according to claim 1, characterized in that: The clamping and fixing structure includes a through plate (13) that moves through the fixing frame (10). The through plate (13) is radially distributed along the first fixing ring (2). A clamping plate (14) is installed at one end of the through plate (13) away from the axis of the first fixing ring (2). The clamping plate (14) is an arc-shaped plate. A pull-out structure is provided at the middle of the two fixing plates (1) on opposite sides.

3. The welding device for offshore wind turbine piles according to claim 2, characterized in that: The pull-out structure includes a cylinder (15) installed in the middle of the side of the fixed plate (1) away from the second fixed ring (8). A first driving ring (16) is installed at one end of the output shaft of the cylinder (15). The end of the through plate (13) near the cylinder (15) is connected to the pull-out plate (17). A pull-out groove (18) is opened on the pull-out plate (17). The first driving ring (16) moves through the pull-out groove (18).

4. The welding device for offshore wind turbine piles according to claim 1, characterized in that: The drive structure includes a mounting plate (19) connected to the right fixed plate (1), a first motor (20) is mounted on the mounting plate (19), and a groove (22) is provided in the middle of the side of the rotating disk (3) on the right side near the fixed plate (1). The output shaft of the first motor (20) is inserted into the groove (22) and a first gear (21) is fixedly sleeved on one end. The first gear (21) meshes with the teeth on the groove wall (22).

5. The welding device for offshore wind turbine piles according to claim 1, characterized in that: The pushing structure includes a bidirectional motor installed in the middle of the inner wall of the connecting cylinder (4). Both output ends of the bidirectional motor are connected to screws (33). The threads on the two screws (33) are opposite. Each screw (33) is fitted with a movable disk (34). The movable disk (34) has a threaded groove. The connecting cylinder (4) has a guide groove (35) for the movable disk (34) to pass through. The connecting cylinder (4) is fitted with movable sleeves (36) near both ends. The movable disk (34) is connected to the movable sleeve (36). The movable sleeve (36) is rotatably connected to a crank (37) on the side of each radial plate (23). One end of the crank (37) is rotatably connected to the movable block (24).

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