An automatic welding device and welding method for wind turbine tower door frame

Abstract

This invention discloses an automatic welding device and method for wind turbine tower door frames, belonging to the technical field of wind turbine tower door frame welding equipment. It includes a wind turbine tower body, a placement mechanism, an external welding mechanism, and an internal welding mechanism. The wind turbine tower body includes a wind turbine tower cylinder, on which a wind turbine tower door frame is installed. The placement mechanism includes a positioning plate and a positioning component; the positioning plate is connected to the positioning component, and the positioning component is connected to the wind turbine tower cylinder. The external welding mechanism includes a first electric cylinder, an upper welding wire reel, a second moving frame support component, an external welding component, and a one-way rotation component. The support component is connected to an installation component, and the first electric cylinder is installed on the installation component. The telescopic end of the first electric cylinder is connected to the support component. The upper welding wire reel and the second moving frame are both connected to the support component. The internal welding mechanism includes a track plate and an internal welding component. The track plate is installed inside the wind turbine tower cylinder and is connected to the internal welding component.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine tower frame welding equipment, and specifically discloses an automatic welding device and welding method for wind turbine tower frames. Background Technology

[0002] Against the backdrop of the global energy structure's accelerated transition to renewable energy, wind power, as one of the core clean energy sources, has seen its equipment manufacturing scale continuously expand. As wind turbine generators develop towards larger single-unit capacities and taller tower structures, the tower, as the core component supporting the unit's operation, faces increasingly stringent reliability requirements in its manufacturing process. In particular, the portal frame structure on the tower's sidewall, serving as a critical passage for equipment installation and maintenance, must maintain structural consistency with the tower body under complex mechanical environments over long periods. This poses unprecedented challenges to the precision and stability of welding processes. Traditional welding methods rely on manual operation, but this has significant limitations in practical applications. Due to the special shape and dimensions of the tower structure, operators are easily affected by the working environment and subjective factors when performing multi-angle, all-position welding, making it difficult to ensure the uniformity of weld quality. Such process deviations can not only lead to potential structural hazards but also increase subsequent maintenance costs, becoming one of the bottlenecks restricting the industry's large-scale development.

[0003] Patent CN110202300A discloses a welding platform for wind turbine tower frames. The technical solution of this patent includes a gantry frame, a traveling platform, a ladder, a winch, a traction component, a fixed pulley, and a hinge. The fixed pulley is installed on the crossbeam of the gantry frame, the winch is located below the fixed pulley, the traveling platform is located in front of the crossbeam, the hinge is located below and behind the traveling platform, the ladder is located in front of the crossbeam, the bottom end of the ladder is hinged to the hinge, and the top end of the ladder is fixed to the traveling platform. One end of the traction component is installed on the traveling platform or the ladder, and the other end is installed on the winch. The traction component also winds around the fixed pulley from behind the crossbeam. However, this patent requires manual handling of the welding wire, which can pose a safety hazard if operated improperly. Furthermore, hand-holding the welding wire makes welding inaccessible to certain corners. Therefore, to address these shortcomings, an automatic welding device and method for wind turbine tower frames have been invented. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution: a device for welding wind turbine tower bodies, comprising a placement mechanism and an external welding mechanism, wherein the wind turbine tower body includes a wind turbine tower cylinder, and a wind turbine tower cylinder door frame is installed on the wind turbine tower cylinder; the placement mechanism includes a positioning plate and a positioning component, wherein the positioning plate is connected to the positioning component, and the positioning component is connected to the wind turbine tower cylinder.

[0005] The external welding mechanism includes a first electric cylinder, an upper welding wire spool, a second moving frame and a support assembly, an external welding assembly and a one-way rotation assembly. The first electric cylinder is mounted on the positioning assembly, and the telescopic end of the first electric cylinder is connected to the support assembly. The upper welding wire spool and the second moving frame are both connected to the support assembly. The second moving frame and the upper welding wire spool are both connected to the external welding assembly. The support assembly is connected to the external welding assembly through the one-way rotation assembly.

[0006] The internal welding mechanism includes a track plate and an internal welding assembly. The track plate is installed inside the wind turbine tower and is connected to the internal welding assembly.

[0007] Furthermore, four positioning plates are provided. The positioning assembly includes two mounting shafts, each fixedly installed between the two positioning plates. A first mounting plate is fixedly installed between every two positioning plates, located above the mounting shafts. Each first mounting plate has a first sliding groove, and a first fixed shaft is fixedly installed on the inner wall of each first sliding groove. A first support plate is slidably installed between the two mounting shafts. A connecting rod is fixedly installed on the side of the first support plate. A fourth support plate is fixedly installed on the side of the connecting rod away from the first support plate. Two mounting blocks are symmetrically installed on both the fourth support plate and the first support plate. A roller is rotatably installed on each mounting block, and all rollers are slidably connected to the wind turbine tower.

[0008] Furthermore, the first fixed shaft is slidably connected to the second movable frame, and the second movable frame is slidably installed on the inner wall of the first slide groove. The support assembly includes the first movable frame, the first movable frame is fixedly connected to the second movable frame, the first movable frame is fixedly connected to the telescopic end of the first electric cylinder, the first movable frame is slidably installed on the inner wall of the first slide groove, a first rotating shaft is fixedly installed on the side of the second movable frame, a first gear is rotatably installed on the outer surface of the first rotating shaft, a second mounting plate is fixedly installed on the upper side of the second movable frame, an upper welding wire spool is rotatably installed on the second mounting plate, a third rotating shaft is fixedly installed on the side of the upper welding wire spool, a second rotating shaft is rotatably installed on the third rotating shaft, a second gear is fixedly installed on the outer surface of the second rotating shaft, and the second gear meshes with the first gear.

[0009] Furthermore, a second support plate is fixedly mounted on the first mounting plate, and a first rack is fixedly mounted on the second support plate. The first rack meshes with a first gear, the first gear and the second gear have the same number of teeth, and the length of the first rack is equal to the length of the first slide groove.

[0010] Furthermore, a second fixed disk is fixedly installed on the outer surface of the third rotating shaft. The unidirectional rotating assembly includes a push block, which is fixedly installed on the side of the second gear facing the second fixed disk. Multiple side shafts are fixedly installed in a circumferential shape at equal intervals on the side of the second fixed disk facing the second gear. A swing block is rotatably installed on each side shaft. A third spring is wound on each side shaft. One end of the third spring is fixedly installed on the outer surface of the side shaft, and the other end of the third spring is fixedly installed on the side of the swing block. Multiple limit blocks are fixedly installed in a circumferential shape at equal intervals on the side of the first fixed disk facing the second gear. The number of limit blocks is equal to the number of side shafts. In the initial state, the side of the limit block is in contact with the side of the swing block. When the push block moves, under the blocking action of the limit blocks, the push block pushes the swing block to move, thereby driving the second fixed disk to rotate.

[0011] Furthermore, a second groove is provided on the side of the second fixed disk away from the second gear. A second fixed shaft is fixedly installed on the inner wall of the second groove. The external welded assembly includes a sliding shaft, which is slidably installed on the side of the second fixed shaft and on the inner wall of the second groove. A section of the first spring is wound around the outer surface of the second fixed shaft. One end of the first spring is fixedly installed on the outer surface of the second fixed shaft, and the other end of the first spring is fixedly installed on the outer surface of the sliding shaft. A pressure block is rotatably installed on the end of the sliding shaft away from the second fixed disk. The pressure block is slidably installed on the side of the second mounting plate. A lifting shaft is slidably installed on the lower side of the pressure block. A driving block is fixedly installed on the side of the lifting shaft. A moving cylinder is fixedly installed on the end of the driving block away from the lifting shaft. A circular through hole one is provided on the moving cylinder. A circular through hole two is also provided on the second moving frame. Circular through hole one and circular through hole two are coaxial. The diameter of circular through hole two is larger than the diameter of circular through hole one.

[0012] Furthermore, the diameter of the circular through hole is equal to the diameter of the welding wire. A third sliding groove is provided on the side of the second mounting plate. A third fixed shaft is fixedly installed on the inner wall of the third sliding groove. A moving block is slidably installed on the outer surface of the third fixed shaft. The moving block is slidably installed on the inner wall of the third sliding groove and fixedly installed on the outer surface of the moving cylinder. A second spring is wound on the outer surface of the third fixed shaft. One end of the second spring is fixedly installed on the outer surface of the third fixed shaft, and the other end of the second spring is fixedly installed on the side of the moving block. Welding wire is wound on the outer surface of the upper welding wire spool. The welding wire is fixedly installed on the inner wall of the circular through hole and extends out of the moving cylinder. Two first arc welding guns are symmetrically fixedly installed on the first moving frame. The arc welding guns are located above the wind turbine tower door frame.

[0013] Furthermore, it also includes a grinding mechanism, which includes a third mounting plate. The third mounting plate is fixedly mounted on the side of the first movable frame. A transmission shaft and a grinding rod are rotatably mounted on the third mounting plate. A third gear is fixedly mounted on the outer surface of the transmission shaft, and a fourth gear is fixedly mounted on the outer surface of the grinding rod. The third gear and the fourth gear mesh. A rotating fan blade is fixedly mounted on the lower part of the transmission shaft. The rotating fan blade is located above the wind turbine tower door frame. A first motor bracket is also fixedly mounted on the third mounting plate. A first motor is fixedly mounted on the first motor bracket. The output end of the first motor is fixedly connected to the third gear. A grinding disc is fixedly mounted on the lower part of the grinding rod.

[0014] Furthermore, two track plates are provided. The lower part of the track plate is arc-shaped, and the internal welded components include a connecting plate, which is fixedly installed between the two track plates. One track plate has a moving track, and a sliding block is slidably installed on the inner wall of the moving track. A second motor is fixedly installed on the sliding block and slidably mounted on the track plate. A third support plate is slidably installed on the connecting plate and is fixedly connected to the second motor. The output end of the second motor is rotatably connected to the third support plate. A fifth gear is rotatably installed on the side of the third support plate and is fixedly installed on the output end of the second motor. A second gear is fixedly installed on the connecting plate. The second rack meshes with the fifth gear; an upper mounting plate is fixedly installed on the third support plate, on which two second arc welding guns and second electric cylinders are fixedly installed symmetrically. Each second electric cylinder has a clamp fixedly installed at its telescopic end. Two reserved holes are symmetrically arranged on the upper mounting plate. Two positioning shafts are fixedly installed symmetrically on the lower side of the third support plate. Each positioning shaft is located below a reserved hole. A lower welding wire spool is rotatably installed on the outer surface of each positioning shaft. Welding wire is wound on each lower welding wire spool. The welding wire on each lower welding wire spool passes through the reserved hole and is connected to the clamp at the telescopic end of a second electric cylinder.

[0015] Furthermore, a method for using an automatic welding device for wind turbine tower door frames includes the following steps.

[0016] S1. Before starting work, place the wind turbine tower on the rollers of the first and fourth support plates. Then, pull out a section of welding wire from the lower welding wire spool, pass it through the reserved hole, and install it on the clamp at the telescopic end of the second electric cylinder. Fix the welding wire with the clamp at the telescopic end of the second electric cylinder. The length of the welding wire extending out of the clamp at the telescopic end of the second electric cylinder is greater than the length of the wind turbine tower frame.

[0017] S2. Pass the welding wire on the upper welding wire spool through the circular through hole on the moving cylinder and place the welding wire at the connection between the wind turbine tower and the wind turbine tower frame. The extension end of the first electric cylinder extends and pushes the first moving frame to move away from the first electric cylinder. The first moving frame drives the second moving frame to move away from the first electric cylinder. Under the action of the first rack, the first gear rotates. The first gear drives the push block to move through the second gear. When the push block moves, under the obstruction of the limit block, the push block pushes the swing block to move, which in turn drives the second fixed plate to rotate. The second fixed plate drives the upper welding wire spool to rotate through the third rotating shaft, thereby releasing the welding wire. At the same time, the pressure block slides down along the second mounting plate. The pressure block presses the lifting shaft down. The lifting shaft drives the moving cylinder to descend along the second mounting plate through the driving block, thereby pulling the welding wire. The electric arc generated by the first arc welding gun heats the welding wire, thereby achieving welding at the connection between the wind turbine tower and the wind turbine tower frame. After welding, the first electric cylinder pulls the first moving frame back to its original position. During this process, the obstruction of the limit block is lost, and the second fixed plate does not rotate.

[0018] S3. At the same time as the first arc welding gun is started, the first motor is started. The first motor drives the third gear to rotate, and the third gear drives the grinding rod to rotate through the fourth gear. At the same time as the third gear rotates, it drives the rotating fan blade to rotate through the transmission shaft. When the grinding rod rotates, it grinds the weld seam through the grinding disc, and blows off the weld seam debris by rotating the fan blade.

[0019] S4, the second motor, the second arc welding gun, and the second electric cylinder start simultaneously. The second motor drives the fifth gear to rotate. Under the action of the second rack, the fifth gear drives the third support plate to slide along the connecting plate. The welding wire on the welding wire spool is pulled by the clamp at the telescopic end of the second electric cylinder. At the same time, the welding wire is melted by the second arc welding gun. The melted welding wire is used to weld the connection between the wind turbine tower and the wind turbine tower frame.

[0020] The beneficial effects of this invention compared with the prior art are: (1) This invention realizes that the welding wire can be automatically pushed without the need for a person to hold the welding wire, thereby improving safety; (2) This invention realizes the collection of the weld residue after grinding, thereby avoiding the impact on the working environment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the wind turbine tower structure of the present invention.

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0024] Figure 4This is a schematic diagram of the external welding mechanism of the present invention.

[0025] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0026] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point C.

[0027] Figure 7 This is a schematic diagram of the unidirectional rotation component structure of the present invention.

[0028] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point D in the middle.

[0029] Figure 9 for Figure 7 A magnified schematic diagram of the structure at point E in the middle.

[0030] Figure 10 This is a schematic diagram showing the positional relationship between the placement mechanism and the collection tank of the present invention.

[0031] Figure 11 for Figure 10 A magnified schematic diagram of the structure at point F in the middle.

[0032] Figure 12 for Figure 10 A magnified schematic diagram of the structure at point G in the middle.

[0033] Figure 13 This is a schematic diagram of the internal welding mechanism of the present invention.

[0034] Figure 14 for Figure 13 A magnified schematic diagram of the structure at point H in the middle.

[0035] Reference numerals: 1-Wind turbine tower body; 2-Placement mechanism; 3-Collection trough; 4-External welding mechanism; 5-Grinding mechanism; 6-Internal welding mechanism; 101-Wind turbine tower body; 102-Wind turbine tower body frame; 201-First support plate; 202-Mounting block; 203-Positioning plate; 204-Mounting shaft; 205-Fourth support plate; 206-Intermediate plate; 207-Connecting rod; 208-First mounting plate; 209-First sliding groove; 210-First fixed shaft; 211- Roller; 401-Second support plate; 402-First rack; 403-First rotating shaft; 404-First gear; 405-First moving frame; 406-First electric cylinder; 407-Second rotating shaft; 408-Second gear; 409-First fixed plate; 410-Second fixed plate; 411-Upper welding wire spool; 412-Second mounting plate; 413-Second slide groove; 414-Pressure block; 415-Sliding shaft; 416-First spring; 417-Second fixed shaft; 418 - Lifting shaft; 419- Driving block; 420- Moving cylinder; 421- Third slide groove; 422- Third fixed shaft; 423- Second spring; 424- Pushing block; 425- Third rotating shaft; 426- Limiting block; 427- Swinging block; 428- Side shaft; 429- Third spring; 430- Second moving frame; 431- First arc welding gun; 432- Moving block; 501- First motor bracket; 502- First motor; 503- Third mounting plate; 504- 505 - Third gear; 506 - Fourth gear; 507 - Transmission shaft; 508 - Rotating fan blade; 509 - Grinding rod; 601 - Track plate; 602 - Connecting plate; 603 - Second rack; 604 - Fifth gear; 605 - Third support plate; 606 - Second motor; 607 - Motion track; 608 - Second arc welding gun; 609 - Second electric cylinder; 610 - Upper mounting plate; 611 - Reserved hole; 612 - Positioning shaft; 613 - Lower welding wire spool; 614 - Sliding block. Detailed Implementation

[0036] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0037] As attached Figure 1 ~Appendix Figure 6As shown, the wind turbine tower body 1 includes a wind turbine tower 101, on which a wind turbine tower door frame 102 is installed. The placement mechanism 2 includes a positioning plate 203 and a positioning component. The positioning plate 203 is connected to the positioning component, and the positioning component is connected to the wind turbine tower 101. The external welding mechanism 4 includes a first electric cylinder 406, an upper welding wire reel 411, a second moving frame 430, a support component, an external welding component, and a one-way rotation component. The first electric cylinder 406 is installed on the positioning component, and the telescopic end of the first electric cylinder 406 is connected to the support component. The upper welding wire reel 411 and the second moving frame 430 are both connected to the support component. The second moving frame 430 and the upper welding wire reel 411 are both connected to the external welding component. The support component is connected to the external welding component through the one-way rotation component. A grinding mechanism 5 is also installed on the support component. The internal welding mechanism 6 includes a track plate 601 and an internal welding component. The track plate 601 is installed inside the wind turbine tower 101 and is connected to the internal welding component.

[0038] As attached Figure 2 ~Appendix Figure 8 As shown, four positioning plates 203 are provided. The positioning assembly includes two mounting shafts 204, each of which is fixedly installed between two positioning plates 203. A first mounting plate 208 is fixedly installed between every two positioning plates 203. The first mounting plate 208 is located above the mounting shaft 204. Each first mounting plate 208 is provided with a first sliding groove 209. A first fixing shaft 210 is fixedly installed on the inner wall of each first sliding groove 209. A first support plate 201 is slidably installed between the two mounting shafts 204. A connecting rod 207 is fixedly installed on the side of the first support plate 201. A fourth support plate 205 is fixedly installed on the side of the connecting rod 207 away from the first support plate 201. Two mounting blocks 202 are symmetrically fixedly installed on the fourth support plate 205 and the first support plate 201. A roller 211 is rotatably installed on each mounting block 202. All rollers 211 are slidably connected to the wind turbine tower 101. An intermediate plate 206 is fixedly installed on the side of the positioning plate 203.

[0039] As attached Figure 3 ~Appendix Figure 9As shown, the first fixed shaft 210 is slidably connected to the second movable frame 430, and the second movable frame 430 is slidably mounted on the inner wall of the first slide groove 209. The support assembly includes the first movable frame 405, which is fixedly connected to the second movable frame 430. The first movable frame 405 is also fixedly connected to the telescopic end of the first electric cylinder 406. An air pump is mounted on the first movable frame 405, and a nozzle is mounted on the lower side of the first movable frame 405. The nozzle is connected to the air pump, which can spray a protective gas, namely nitrogen, through the nozzle. The first movable frame 405 is slidably mounted on the inner wall of the first slide groove 209. A first rotating shaft 403 is fixedly mounted on the side of the second movable frame 430, and a first gear 4 is rotatably mounted on the outer surface of the first rotating shaft 403. 04. A second mounting plate 412 is fixedly installed on the upper side of the second movable frame 430. The upper welding wire spool 411 is rotatably installed on the second mounting plate 412. A third rotating shaft 425 is fixedly installed on the side of the upper welding wire spool 411. A second rotating shaft 407 is rotatably installed on the third rotating shaft 425. A second gear 408 is fixedly installed on the outer surface of the second rotating shaft 407. The second gear 408 meshes with the first gear 404. A second support plate 401 is fixedly installed on the first mounting plate 208. A first rack 402 is fixedly installed on the second support plate 401. The first rack 402 meshes with the first gear 404. The first gear 404 and the second gear 408 have the same number of teeth. The length of the first rack 402 is equal to the length of the first slide groove 209.

[0040] As attached Figure 4 ~Appendix Figure 10 As shown, a second fixed disk 410 is fixedly mounted on the outer surface of the third rotating shaft 425. The unidirectional rotating assembly includes a push block 424, which is fixedly mounted on the side of the second gear 408 facing the second fixed disk 410. A plurality of side shafts 428 are fixedly mounted in a circumferential shape at equal intervals on the side of the first fixed disk 409 facing the second gear 408. A swing block 427 is rotatably mounted on each side shaft 428. A section of a third spring 429 is wound around each side shaft 428, and one end of the third spring 429 is fixedly mounted on... On the outer surface of the side shaft 428, the other end of the third spring 429 is fixedly installed on the side of the swing block 427. The side of the second fixed disk 410 facing the second gear 408 is fixedly installed with multiple limit blocks 426 at equal intervals in a circular shape. The number of limit blocks 426 is equal to the number of side shafts 428. In the initial state, the side of the limit block 426 is in contact with the side of the swing block 427. When the push block 424 moves, under the blocking action of the limit block 426, the push block 424 pushes the swing block 427 to move, thereby driving the second fixed disk 410 to rotate.

[0041] As attached Figure 5 ~Appendix Figure 11As shown, a second groove 413 is provided on the side of the second fixed disk 410 away from the second gear 408. A second fixed shaft 417 is fixedly installed on the inner wall of the second groove 413. The external welded assembly includes a sliding shaft 415, which is slidably installed on the side of the second fixed shaft 417 and on the inner wall of the second groove 413. A section of a first spring 416 is wound around the outer surface of the second fixed shaft 417. One end of the first spring 416 is fixedly installed on the outer surface of the second fixed shaft 417, and the other end is fixedly installed on the outer surface of the sliding shaft 415. On the surface, a pressure block 414 is rotatably mounted on the end of the sliding shaft 415 away from the second fixed plate 410. The pressure block 414 is slidably mounted on the side of the second mounting plate 412. A lifting shaft 418 is slidably mounted on the lower side of the pressure block 414. A driving block 419 is fixedly mounted on the side of the lifting shaft 418. A moving cylinder 420 is fixedly mounted on the end of the driving block 419 away from the lifting shaft 418. A circular through hole 1 is provided on the moving cylinder 420. A circular through hole 2 is also provided on the second moving frame 430. The circular through hole 1 and the circular through hole 2 are coaxial. The diameter of the circular through hole 2 is larger than the diameter of the circular through hole 1.A circular through hole has a diameter equal to that of the welding wire. A third sliding groove 421 is provided on the side of the second mounting plate 412. A third fixed shaft 422 is fixedly installed on the inner wall of the third sliding groove 421. A movable block 432 is slidably installed on the outer surface of the third fixed shaft 422. The movable block 432 is slidably installed on the inner wall of the third sliding groove 421 and fixedly installed on the outer surface of the movable cylinder 420. A second spring 423 is wound around the outer surface of the third fixed shaft 422. One end of the second spring 423 is fixedly installed on the outer surface of the third fixed shaft 422, and the other end of the second spring 423 is fixedly installed on the side of the movable block 432. Welding wire is wound around the outer surface of the upper welding wire reel 411. The welding wire is fixedly installed on the inner wall of the circular through hole, and extends out of the moving cylinder 420. Two first arc welding guns 431 are symmetrically fixedly installed on the first moving frame 405. The first arc welding guns 431 are located above the wind turbine tower door frame 102. A photoelectric sensor is installed on the first arc welding gun 431, and the photoelectric sensor is electrically connected to the switch of the first arc welding gun 431. The welding wire on the upper welding wire reel 411 is passed through the circular through hole on the moving cylinder 420 and the welding wire is placed at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. Then the first electric cylinder 406 is activated, and the telescopic end of the first electric cylinder 406 extends to push the first moving frame 405 along the distance. Moving away from the first electric cylinder 406, the first moving frame 405 drives the second moving frame 430 to move away from the first electric cylinder 406. Under the action of the first rack 402, the first gear 404 rotates. The first gear 404 drives the push block 424 to move through the second gear 408. When the push block 424 moves, under the blocking action of the limit block 426, the push block 424 pushes the swing block 427 to move, thereby driving the second fixed plate 410 to rotate. The second fixed plate 410 drives the upper welding wire reel 411 to rotate through the third rotating shaft 425, thereby releasing the welding wire. At the same time, the pressure block 414 slides downward along the second mounting plate 412. 4. The lifting shaft 418 is lowered, and the lifting shaft 418 drives the moving cylinder 420 to descend along the second mounting plate 412 via the driving block 419, thereby pulling the welding wire. When the photoelectric sensor detects the gap at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102, the first arc welding gun 431 is activated to generate an arc. The arc generated by the first arc welding gun 431 heats the welding wire, thereby achieving welding at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. After welding, the first electric cylinder 406 pulls the first moving frame 405 back to its original position. During this process, the limit block 426 is no longer obstructed, and the second fixed plate 410 does not rotate.

[0042] As attached Figure 6 ~Appendix Figure 12As shown, the grinding mechanism 5 includes a third mounting plate 503, which is fixedly mounted on the side of the first movable frame 405. A transmission shaft 506 and a grinding rod 508 are rotatably mounted on the third mounting plate 503. A third gear 504 is fixedly mounted on the outer surface of the transmission shaft 506, and a fourth gear 505 is fixedly mounted on the outer surface of the grinding rod 508. The third gear 504 meshes with the fourth gear 505. A rotating fan blade 507 is fixedly mounted on the lower part of the transmission shaft 506, and the rotating fan blade 507 is located above the wind turbine tower door frame 102. A first motor bracket 501 is also fixedly mounted on the third mounting plate 503, and a first motor bracket 501 is fixedly mounted on the first motor bracket 501. Motor 502, the output end of the first motor 502 is fixedly connected to the third gear 504, a grinding disc is fixedly installed on the lower part of the grinding rod 508, and a photoelectric sensor is electrically connected to the first motor 502. The first motor 502 starts at the same time as the first arc welding gun 431 starts. The first motor 502 drives the third gear 504 to rotate. The third gear 504 drives the grinding rod 508 to rotate through the fourth gear 505. At the same time as the third gear 504 rotates, it drives the rotating fan blade 507 to rotate through the transmission shaft 506. When the grinding rod 508 rotates, it grinds the weld seam through the grinding disc. The rotating fan blade blows the ground debris down and it falls into the collection tank 3.

[0043] As attached Figure 7 ~Appendix Figure 14As shown, two track plates 601 are provided. The lower part of the track plate 601 is arc-shaped, and the internal welded components include a connecting plate 602. The connecting plate 602 is fixedly installed between the two track plates 601. A moving track 607 is provided on one track plate 601. A sliding block 614 is slidably installed on the inner wall of the moving track 607. A second motor 606 is fixedly installed on the sliding block 614. The second motor 606 is slidably installed on the track plate 601. A third support plate 605 is slidably installed on the connecting plate 602. The third support plate 605 is connected to the second motor 606. The machine 606 is fixedly connected, and the output end of the second motor 606 is rotatably connected to the third support plate 605. A fifth gear 604 is rotatably mounted on the side of the third support plate 605. The fifth gear 604 is fixedly mounted on the output end of the second motor 606. A second rack 603 is fixedly mounted on the connecting plate 602, and the second rack 603 meshes with the fifth gear 604. An upper mounting plate 610 is fixedly mounted on the third support plate 605. Two second arc welding guns 608 and second electric cylinders 609 are symmetrically fixedly mounted on the upper mounting plate 610. The telescopic ends of the second electric cylinder 609 are fixedly equipped with clamps. Two pre-drilled holes 611 are symmetrically arranged on the upper mounting plate 610. Two positioning shafts 612 are symmetrically fixedly installed on the lower side of the third support plate 605. Each positioning shaft 612 is located below a pre-drilled hole 611. A lower welding wire spool 613 is rotatably mounted on the outer surface of each positioning shaft 612. Welding wire is wound on each lower welding wire spool 613, and the welding wire on each lower welding wire spool 613 passes through the pre-drilled hole 611 and engages with a clamp at the telescopic end of the second electric cylinder 609. Simultaneously, the second motor 606, the second arc welding gun 608, and the second electric cylinder 609 are started. The second motor 606 drives the fifth gear 604 to rotate. Under the action of the second rack 603, the fifth gear 604 drives the third support plate 605 to slide along the connecting plate 602. The welding wire on the welding wire spool 613 is pulled by the clamp at the telescopic end of the second electric cylinder 609. At the same time, the welding wire is melted by the second arc welding gun 608. The melted welding wire is used to weld the connection between the wind turbine tower 101 and the wind turbine tower door frame 102.

[0044] The working principle of this invention is as follows.

[0045] (a) Before work, place the wind turbine tower 101 on the rollers 211 of the first support plate 201 and the fourth support plate 205. Then, pull out a section of welding wire from the lower welding wire spool 613, pass it through the reserved hole 611, and install it on the clamp at the telescopic end of the second electric cylinder 609. Fix the welding wire with the clamp at the telescopic end of the second electric cylinder 609. The welding wire extends out of the clamp at the telescopic end of the second electric cylinder 609, and the length of the welding wire extending out of the clamp at the telescopic end of the second electric cylinder 609 is greater than the length of the wind turbine tower door frame 102.

[0046] (ii) Pass the welding wire on the upper welding wire spool 411 through the circular through hole on the moving cylinder 420 and place the welding wire at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. Then, the first electric cylinder 406 and the air pump are started, and the air pump sprays nitrogen gas into the wind turbine tower 101 through the nozzle.

[0047] The extension end of the first electric cylinder 406 pushes the first moving frame 405 to move away from the first electric cylinder 406. The first moving frame 405 drives the second moving frame 430 to move away from the first electric cylinder 406. Under the action of the first rack 402, the first gear 404 rotates. The first gear 404 drives the push block 424 to move through the second gear 408. When the push block 424 moves, under the blocking action of the limit block 426, the push block 424 pushes the swing block 427 to move, thereby driving the second fixed plate 410 to rotate. The second fixed plate 410 drives the upper welding wire spool 411 to rotate through the third rotating shaft 425, thereby releasing the welding wire. At the same time, the pressure block 414 moves along the second mounting... The plate 412 slides downward, and the pressure block 414 presses the lifting shaft 418 down. The lifting shaft 418 drives the moving cylinder 420 down along the second mounting plate 412 through the driving block 419, thereby pulling the welding wire. When the photoelectric sensor detects the gap at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102, the first arc welding gun 431 is activated to generate an arc. The arc generated by the first arc welding gun 431 heats the welding wire, thereby realizing the welding at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. After the welding is completed, the first electric cylinder 406 pulls the first moving frame 405 back to its original position. During this process, the limit block 426 is no longer blocked, and the second fixed plate 410 does not rotate.

[0048] (III) When the first arc welding gun 431 is started, the first motor 502 is started. The first motor 502 drives the third gear 504 to rotate. The third gear 504 drives the grinding rod 508 to rotate through the fourth gear 505. When the third gear 504 rotates, it drives the rotating fan blade 507 to rotate through the transmission shaft 506. When the grinding rod 508 rotates, it grinds the weld seam through the grinding disc. The rotating fan blade 507 blows the ground debris off and it falls into the collection tank 3.

[0049] (iv) The second motor 606, the second arc welding gun 608, and the second electric cylinder 609 are started simultaneously. The second motor 606 drives the fifth gear 604 to rotate. Under the action of the second rack 603, the fifth gear 604 drives the third support plate 605 to slide along the connecting plate 602. The welding wire on the welding wire spool 613 is pulled by the clamp at the telescopic end of the second electric cylinder 609. At the same time, the welding wire is melted by the second arc welding gun 608. The molten welding wire is used to weld the connection between the wind turbine tower 101 and the wind turbine tower door frame 102.

[0050] The present invention also discloses a method for using an automatic welding device for wind turbine tower door frames, comprising the following steps.

[0051] S1. Before starting work, place the wind turbine tower 101 on the rollers 211 of the first support plate 201 and the fourth support plate 205. Then, pull out a section of welding wire from the lower welding wire spool 613, pass it through the reserved hole 611, and install it on the clamp at the telescopic end of the second electric cylinder 609. Fix the welding wire with the clamp at the telescopic end of the second electric cylinder 609. The welding wire extends out of the clamp at the telescopic end of the second electric cylinder 609, and the length of the welding wire extending out of the clamp at the telescopic end of the second electric cylinder 609 is greater than the length of the wind turbine tower frame 102.

[0052] S2. Pass the welding wire on the upper welding wire spool 411 through the circular through hole on the moving cylinder 420 and place the welding wire at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. Then, the first electric cylinder 406 and the air pump are started. The air pump sprays nitrogen gas into the wind turbine tower 101 through the nozzle. The telescopic end of the first electric cylinder 406 extends, pushing the first moving frame 405 to move away from the first electric cylinder 406. The first moving frame 405 drives the second moving frame 430 to move away from the first electric cylinder 406. Under the action of the first rack 402, the first gear 404 rotates. The first gear 404 drives the push block 424 to move through the second gear 408. When the push block 424 moves, under the blocking action of the limit block 426, the push block 424 pushes the swing block 427 to move, thereby driving the second fixed plate 410 to rotate. The second fixed plate 41... The third rotating shaft 425 drives the upper welding wire reel 411 to rotate, thereby releasing the welding wire. At the same time, the pressure block 414 slides down along the second mounting plate 412, and the pressure block 414 presses the lifting shaft 418 to descend. The lifting shaft 418 drives the moving cylinder 420 to descend along the second mounting plate 412 through the driving block 419, thereby pulling the welding wire. When the photoelectric sensor detects the gap at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102, the first arc welding gun 431 is activated to generate an arc. The arc generated by the first arc welding gun 431 heats the welding wire, thereby achieving welding at the connection between the wind turbine tower 101 and the wind turbine tower door frame 102. After the welding is completed, the first electric cylinder 406 pulls the first moving frame 405 back to its original position. During this process, the limit block 426 is no longer blocking, and the second fixed plate 410 does not rotate.

[0053] S3. At the same time as the first arc welding gun 431 is started, the first motor 502 is started. The first motor 502 drives the third gear 504 to rotate. The third gear 504 drives the grinding rod 508 to rotate through the fourth gear 505. At the same time as the third gear 504 rotates, it drives the rotating fan blade 507 to rotate through the transmission shaft 506. When the grinding rod 508 rotates, it grinds the weld seam through the grinding disc. The rotating fan blade 507 blows the ground debris off and it falls into the collection tank 3.

[0054] S4, the second motor 606, the second arc welding gun 608, and the second electric cylinder 609 start simultaneously. The second motor 606 drives the fifth gear 604 to rotate. Under the action of the second rack 603, the fifth gear 604 drives the third support plate 605 to slide along the connecting plate 602. The welding wire on the welding wire spool 613 is pulled by the clamp at the telescopic end of the second electric cylinder 609. At the same time, the welding wire is melted by the second arc welding gun 608. The melted welding wire is used to weld the connection between the wind turbine tower 101 and the wind turbine tower door frame 102.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic welding device for wind turbine tower frame, used for welding wind turbine tower body (1), characterized in that: The wind turbine tower body (1) includes a placement mechanism (2) and an external welding mechanism (4). The wind turbine tower body (1) includes a wind turbine tower (101). A wind turbine tower door frame (102) is installed on the wind turbine tower (101). The placement mechanism (2) includes a positioning plate (203) and a positioning component. The positioning plate (203) is connected to the positioning component, and the positioning component is connected to the wind turbine tower (101). The external welding mechanism (4) includes a first electric cylinder (406), an upper welding wire spool (411), a second moving frame (430), a support assembly, an external welding assembly, and a one-way rotation assembly. The first electric cylinder (406) is mounted on the positioning assembly. The telescopic end of the first electric cylinder (406) is connected to the support assembly. The upper welding wire spool (411) and the second moving frame (430) are both connected to the support assembly. The second moving frame (430) and the upper welding wire spool (411) are both connected to the external welding assembly. The support assembly is connected to the external welding assembly through the one-way rotation assembly. The internal welding mechanism (6) includes a track plate (601) and an internal welding assembly. The track plate (601) is installed inside the wind turbine tower (101) and is connected to the internal welding assembly. Four positioning plates (203) are provided. The positioning assembly includes two mounting shafts (204). Each mounting shaft (204) is fixedly installed between the two positioning plates (203). A first mounting plate (208) is fixedly installed between every two positioning plates (203). The first mounting plate (208) is located above the mounting shaft (204). Each first mounting plate (208) is provided with a first sliding groove (209). A first fixing shaft (210) is fixedly installed on the inner wall of each first sliding groove (209). The two mounting shafts ( A first support plate (201) is slidably installed between 204), a connecting rod (207) is fixedly installed on the side of the first support plate (201), a fourth support plate (205) is fixedly installed on the side of the connecting rod (207) away from the first support plate (201), two mounting blocks (202) are fixedly installed symmetrically on the fourth support plate (205) and the first support plate (201), and a roller (211) is rotatably installed on each mounting block (202), and all rollers (211) are slidably connected to the wind turbine tower (101); The first fixed shaft (210) is slidably connected to the second movable frame (430), and the second movable frame (430) is slidably installed on the inner wall of the first slide groove (209). The support assembly includes the first movable frame (405), which is fixedly connected to the second movable frame (430) and to the telescopic end of the first electric cylinder (406). The first movable frame (405) is slidably installed on the inner wall of the first slide groove (209), and the second movable frame (430) has a first rotating shaft (403) fixedly installed on its side. A first gear (404) is rotatably mounted on the outer surface of a rotating shaft (403). A second mounting plate (412) is fixedly mounted on the upper side of a second movable frame (430). An upper welding wire spool (411) is rotatably mounted on the second mounting plate (412). A third rotating shaft (425) is fixedly mounted on the side of the upper welding wire spool (411). A second rotating shaft (407) is rotatably mounted on the third rotating shaft (425). A second gear (408) is fixedly mounted on the outer surface of the second rotating shaft (407). The second gear (408) meshes with the first gear (404). A second support plate (401) is fixedly installed on the first mounting plate (208), and a first rack (402) is fixedly installed on the second support plate (401). The first rack (402) meshes with the first gear (404). The first gear (404) and the second gear (408) have the same number of teeth. The length of the first rack (402) is equal to the length of the first groove (209). The outer surface of the third rotating shaft (425) is fixedly mounted with a second fixed disk (410). The unidirectional rotating assembly includes a push block (424), which is fixedly mounted on the side of the second gear (408) facing the second fixed disk (410). The side of the first fixed disk (409) facing the second gear (408) is fixedly mounted with multiple side shafts (428) at equal intervals in a circular shape. Each side shaft (428) is rotatably mounted with a swing block (427). Each side shaft (428) is wound with a section of a third spring (429), one end of which is fixedly mounted on the side. On the outer surface of the shaft (428), the other end of the third spring (429) is fixedly installed on the side of the swing block (427). On the side of the first fixed plate (409) facing the second gear (408), multiple limit blocks (426) are fixedly installed in a circumferential shape at equal intervals. The number of limit blocks (426) is equal to the number of side shafts (428). In the initial state, the side of the limit block (426) is in contact with the side of the swing block (427). When the push block (424) moves, under the blocking action of the limit block (426), the push block (424) pushes the swing block (427) to move, thereby driving the second fixed plate (410) to rotate.

2. The automatic welding device for wind turbine tower door frame according to claim 1, characterized in that: A second groove (413) is provided on the side of the second fixed disk (410) away from the second gear (408). A second fixed shaft (417) is fixedly installed on the inner wall of the second groove (413). The external welded assembly includes a sliding shaft (415). The sliding shaft (415) is slidably installed on the side of the second fixed shaft (417) and on the inner wall of the second groove (413). A section of a first spring (416) is wound around the outer surface of the second fixed shaft (417). One end of the first spring (416) is fixedly installed on the outer surface of the second fixed shaft (417), and the other end of the first spring (416) is fixedly installed on the outer surface of the sliding shaft (415). On the surface, a pressure block (414) is rotatably installed at the end of the sliding shaft (415) away from the second fixed plate (410). The pressure block (414) is slidably installed on the side of the second mounting plate (412). A lifting shaft (418) is slidably installed on the lower side of the pressure block (414). A driving block (419) is fixedly installed on the side of the lifting shaft (418). A moving cylinder (420) is fixedly installed at the end of the driving block (419) away from the lifting shaft (418). A circular through hole one is provided on the moving cylinder (420). A circular through hole two is also provided on the second moving frame (430). The circular through hole one and the circular through hole two are coaxial. The diameter of the circular through hole two is larger than the diameter of the circular through hole one.

3. The automatic welding device for wind turbine tower door frame according to claim 2, characterized in that: A circular through hole has a diameter equal to that of the welding wire. A third groove (421) is provided on the side of the second mounting plate (412). A third fixed shaft (422) is fixedly installed on the inner wall of the third groove (421). A moving block (432) is slidably installed on the outer surface of the third fixed shaft (422). The moving block (432) is slidably installed on the inner wall of the third groove (421). The moving block (432) is fixedly installed on the outer surface of the moving cylinder (420). A second spring (42) is wound around the outer surface of the third fixed shaft (422). 3) One end of the second spring (423) is fixedly installed on the outer surface of the third fixed shaft (422), and the other end of the second spring (423) is fixedly installed on the side of the moving block (432). The outer surface of the upper welding wire spool (411) is wrapped with welding wire, and the welding wire is fixedly installed on the inner wall of the circular through hole. The welding wire extends out of the moving cylinder (420). Two first arc welding guns (431) are fixedly installed symmetrically on the first moving frame (405). The first arc welding guns (431) are located above the wind turbine tower door frame (102).

4. The automatic welding device for wind turbine tower door frame according to claim 3, characterized in that: It also includes a grinding mechanism (5), which includes a third mounting plate (503). The third mounting plate (503) is fixedly mounted on the side of the first movable frame (405). A transmission shaft (506) and a grinding rod (508) are rotatably mounted on the third mounting plate (503). A third gear (504) is fixedly mounted on the outer surface of the transmission shaft (506), and a fourth gear (505) is fixedly mounted on the outer surface of the grinding rod (508). The third gear (504) and the fourth gear... (505) Engagement, a rotating fan blade (507) is fixedly installed on the lower part of the transmission shaft (506). The rotating fan blade (507) is located above the wind turbine tower door frame (102). A first motor bracket (501) is also fixedly installed on the third mounting plate (503). A first motor (502) is fixedly installed on the first motor bracket (501). The output end of the first motor (502) is fixedly connected to the third gear (504). A grinding disc is fixedly installed on the lower part of the grinding rod (508).

5. The automatic welding device for wind turbine tower door frame according to claim 4, characterized in that: Two track plates (601) are provided. The lower part of the track plate (601) is arc-shaped. The internal welded components include a connecting plate (602). The connecting plate (602) is fixedly installed between the two track plates (601). A motion track (607) is provided on one track plate (601). A sliding block (614) is slidably installed on the inner wall of the motion track (607). A second motor (606) is fixedly installed on the sliding block (614). The second motor (606) is slidably installed on the track plate (601). A third support plate (605) is slidably installed on the connecting plate (602). The third support plate (605) is fixedly connected to the second motor (606). The output end of the second motor (606) is rotatably connected to the third support plate (605). A fifth gear (604) is rotatably installed on the side of the third support plate (605). The fifth gear (604) is fixedly installed on the output end of the second motor (606). The connecting plate (602) is fixedly installed with... The equipment is equipped with a second rack (603), which meshes with a fifth gear (604); an upper mounting plate (610) is fixedly installed on a third support plate (605), and two second arc welding guns (608) and a second electric cylinder (609) are fixedly installed symmetrically on the upper mounting plate (610). Each second electric cylinder (609) has a clamp fixedly installed at its telescopic end, and two reserved holes (611) are symmetrically provided on the upper mounting plate (610). Two positioning shafts (612) are symmetrically fixedly installed on the lower side of the third support plate (605). Each positioning shaft (612) is located below a reserved hole (611). A lower welding wire spool (613) is rotatably installed on the outer surface of each positioning shaft (612). Welding wire is wound on each lower welding wire spool (613). The welding wire on each lower welding wire spool (613) passes through the reserved hole (611) and is connected to the clamp at the telescopic end of a second electric cylinder (609).

6. The automatic welding device for wind turbine tower door frame according to claim 5, characterized in that: The usage method includes the following steps; S1. Before starting work, place the wind turbine tower (101) on the rollers (211) of the first support plate (201) and the fourth support plate (205). Then, pull out a section of welding wire from the lower welding wire spool (613), pass it through the reserved hole (611), and install it on the clamp at the telescopic end of the second electric cylinder (609). Fix the welding wire with the clamp at the telescopic end of the second electric cylinder (609). The welding wire extends out of the clamp at the telescopic end of the second electric cylinder (609). The length of the welding wire extending out of the clamp at the telescopic end of the second electric cylinder (609) is greater than the length of the wind turbine tower door frame (102). S2. Pass the welding wire on the upper welding wire spool (411) through the circular through hole on the moving cylinder (420) and place the welding wire at the connection between the wind turbine tower (101) and the wind turbine tower door frame (102). The telescopic end of the first electric cylinder (406) extends and pushes the first moving frame (405) to move away from the first electric cylinder (406). The first moving frame (405) drives the second moving frame (430) to move away from the first electric cylinder (406). Under the action of the first rack (402), the first gear (404) rotates. The first gear (404) drives the push block (424) to move through the second gear (408). When the push block (424) moves, under the blocking action of the limit block (426), the push block (424) pushes the swing block (427) to move, thereby driving the second fixed plate (410). The second fixed plate (410) rotates, and the third rotating shaft (425) drives the upper welding wire spool (411) to rotate, thereby releasing the welding wire. At the same time, the pressure block (414) slides down along the second mounting plate (412), and the pressure block (414) presses the lifting shaft (418) to descend. The lifting shaft (418) drives the moving cylinder (420) to descend along the second mounting plate (412) through the driving block (419), thereby pulling the welding wire. The electric arc generated by the first electric arc welding gun (431) heats the welding wire, thereby realizing the welding of the connection between the wind turbine tower (101) and the wind turbine tower door frame (102). After the welding is completed, the first electric cylinder (406) pulls the first moving frame (405) back to its original position. During this process, the limit block (426) is no longer blocked, and the second fixed plate (410) does not rotate. S3. Simultaneously with the start of the first arc welding gun (431), the first motor (502) is started. The first motor (502) drives the third gear (504) to rotate. The third gear (504) drives the grinding rod (508) to rotate through the fourth gear (505). At the same time as the third gear (504) rotates, it drives the rotating fan blade (507) to rotate through the transmission shaft (506). When the grinding rod (508) rotates, it grinds the weld seam through the grinding disc. The rotating fan blade (507) blows off the weld seam debris. S4. The second motor (606), the second arc welding gun (608), and the second electric cylinder (609) start simultaneously. The second motor (606) drives the fifth gear (604) to rotate. Under the action of the second rack (603), the fifth gear (604) drives the third support plate (605) to slide along the connecting plate (602). The welding wire on the welding wire spool (613) is pulled by the clamp at the telescopic end of the second electric cylinder (609). At the same time, the welding wire is melted by the second arc welding gun (608). The melted welding wire is used to weld the connection between the wind turbine tower (101) and the wind turbine tower door frame (102).

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