Wind power tower tube weld joint welding device and welding method thereof

Abstract

The invention discloses a wind power tower tube weld joint welding device and a welding method thereof, and relates to the technical field of wind power equipment manufacturing, the wind power tower tube weld joint welding device specifically comprises a fixing frame connected with the ground, a supporting structure located in a wind power tower tube and a welding device body, comprising a first arc-shaped plate matched with the inner wall of a wind power tower, a second arc-shaped plate matched with the inner wall of the wind power tower, an upper connecting plate and a lower connecting plate. The welding seam is pressed and supported through the supporting structure, welding deformation is reduced, the stability of the welding seam is enhanced, a stable welding platform can be provided for workers, and it is ensured that welding equipment and the workers are stably fixed in the operation process. When the wind power tower rotates, the welding device does not need to be moved frequently or the operation position does not need to be adjusted frequently, the problems of equipment displacement, personnel repeated positioning and the like caused by rotation of the tower are avoided, welding operation is more accurate, welding quality is guaranteed, and welding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment manufacturing technology, specifically to a welding device and welding method for wind turbine tower welds. Background Technology

[0002] With the global energy structure shifting towards cleaner and renewable energy, wind energy, as a technologically mature and resource-rich clean energy source, continues to see its development and utilization scale expand. As the core supporting component of wind turbine generators, the wind turbine tower bears the important mission of fixing the unit, transmitting loads, and ensuring the stable operation of the unit. Its structural safety and reliability directly determine the entire service life and power generation efficiency of the wind turbine generator.

[0003] Wind turbine towers are typically manufactured using a segmented process, with each segment mostly constructed from rolled and welded steel plates. Adjacent segments are assembled using flange connections or direct welding. In this process, the weld seam, as a crucial structural element connecting the segments, directly determines the overall mechanical properties of the tower. However, because towers are usually made of thick-walled steel plates, the high-temperature thermal cycling during welding (steel plates expanding when heated and contracting when cooled) easily leads to defects such as lateral shrinkage deformation, angular deformation, and radial bulging, significantly affecting the mechanical properties and structural integrity of the welded joints.

[0004] Furthermore, existing mainstream welding technologies (such as manual arc welding and CO2 gas shielded welding) generate a large amount of high-temperature sparks and molten slag spatter during implementation. These spatters not only splash onto the inner wall or surface of the tower, forming surface defects (such as burns and adhering particles), but also require additional manpower and resources for subsequent cleaning operations. This not only increases the complexity of the production process, but also directly reduces the production efficiency of wind turbine towers.

[0005] Based on this, this application proposes a welding device and welding method for the weld seam of a wind turbine tower. Summary of the Invention

[0006] This invention provides a welding device and method for welding seams in wind turbine towers, offering the following advantages: By utilizing a support structure to press and support the weld seam, welding deformation is reduced, weld stability is enhanced, and a stable welding platform is provided for workers, ensuring the stable fixation of welding equipment and personnel during operation. When the wind turbine tower rotates, there is no need to frequently move the welding device or adjust the working position, avoiding problems such as equipment displacement and repetitive personnel positioning caused by tower rotation. This makes welding operations more precise, helps ensure welding quality, and improves welding efficiency. An airflow curtain can intercept welding spatter, preventing it from splashing onto the inner wall of the wind turbine tower, thus preventing burns and contamination, and also preventing injury to operators from spatter. An exhaust fan removes excess fumes from inside the support structure, reducing the harm of welding fumes to operators, ensuring their health and safety, and solving the problems mentioned in the background section.

[0007] This invention provides the following technical solution: a welding device for wind turbine tower welds, comprising a fixed frame connected to the ground, a support structure located inside the wind turbine tower, and a welding device body. The support structure is modularly designed, including a first arc-shaped plate adapted to the inner wall of the wind turbine tower, a second arc-shaped plate adapted to the inner wall of the wind turbine tower, an upper connecting plate and a lower connecting plate connected to the first arc-shaped plate via a connecting structure. The first arc-shaped plate and the second arc-shaped plate are connected to the fixed frame via a linear movement structure. A first support side ring is connected to the middle of the outer wall of the first arc-shaped plate, a second support side ring is connected to the middle of the outer wall of the second arc-shaped plate, an upper support ring is connected to the middle of the top of the upper connecting plate, and a lower sealing ring is provided at the bottom of the lower connecting plate. When the axes of the first support side ring, the second support side ring, the upper support ring, and the lower sealing ring are aligned, they together form an annular pressing support structure adapted to the wind turbine tower weld. Both the first and second arc-shaped plates have a movable platform at the bottom of their inner cavities. The movable platform and the lower connecting plate form a welding platform. The lower connecting plate includes a fixed part and a movable part. The fixed part is connected to a movable platform through a first lifting structure. The movable part is connected to the fixed part through a telescopic structure. A welding window is provided in the middle of the movable part.

[0008] Preferably, the inner wall of the first arc-shaped plate is connected to a first support rod, and the inner wall of the second arc-shaped plate is connected to a second support rod. Both the first support rod and the second support rod are connected to the linear moving structure.

[0009] Preferably, the support structure further includes a positioning component, which includes a positioning plate and a first scale line. The positioning plate is movably sleeved on the outer side of both the first support rod and the second support rod. The positioning plate is connected to the first support rod or the second support rod by bolts. The first scale line is provided on one side of both the first support rod and the second support rod, and the positioning plate is in contact with the first scale line.

[0010] Preferably, the main body of the welding device is placed on the welding platform, and a lifting and fixing component is provided on the top of the lower connecting plate. The welding torch of the main body of the welding device is fixed in position through the lifting and fixing component.

[0011] Preferably, it further includes an interception component, which includes a spray ring, a suction ring, an air compressor, and an exhaust fan. Spray rings are provided at both ends of the first arc-shaped plate, and the air inlet end of the spray ring is connected to the air outlet end of the air compressor through an air inlet pipe. Suction rings are provided at corresponding positions at both ends of the second arc-shaped plate, and the air outlet end of the suction ring is connected to the air inlet end of the exhaust fan through an exhaust pipe.

[0012] Preferably, the connecting structure includes a support plate connected to the first arc-shaped plate and a second lifting structure connected to the support plate, wherein the movable end of the second lifting structure is connected to the middle of the bottom of the upper connecting plate.

[0013] Preferably, the distance between the positioning plate and the middle of the annular pressing support structure is the same as the length of the wind turbine tower.

[0014] Preferably, the top of the fixed part and the top of the movable part away from the fixed part are at the same height, the lower sealing ring is connected to the bottom of the movable part, and lower sealing rings are provided on both sides of the welding window.

[0015] A welding method for the weld seam of a wind turbine tower includes the following steps: Step 1: Adjust the position of the positioning plate according to the length of the wind turbine tower to be welded, so that the distance between the positioning plate and the first support side ring, the second support side ring or the upper support ring is the same as the length of one wind turbine tower. Fix the position of the positioning plate with bolts. Step 2: After the adjacent wind turbine towers are connected, move the fixing frame and use the fixing frame to drive the support structure to move in the inner cavity of the wind turbine tower until the positioning plate is tightly attached to the wind turbine tower to be welded. At this time, the mid-section of the first support side ring, the second support side ring and the upper support ring are aligned with the vertical surface where the weld is located. The support structure moves to the preset position and fixes the position of the fixing frame. Step 3: The first arc plate and the second arc plate are moved simultaneously by the linear moving structure. Both the first arc plate and the second arc plate are close to the weld until the first support side ring and the second support side ring are in contact with the weld. Step 4: Use the second lifting structure to move the upper connecting plate up until the upper support ring is tightly fitted with the top of the weld. At this time, the first support side ring, the second support side ring and the upper support ring form an arc-shaped structure that squeezes and supports the weld. Step 5: Use the first lifting structure to move the lower connecting plate down until the bottom of the lower connecting plate is tightly attached to the bottom of the weld. During the downward movement of the lower connecting plate, use the telescopic structure to change the position of the movable part until the welding window is located at the welding station. At this time, the top of the lower connecting plate and the top of the two movable platforms form a welding platform. Step 6: Place the main body of the welding device on the welding platform, adjust and lock the spatial posture and working height of the welding torch of the main body of the welding device using the lifting and fixing components, and use the main body of the welding device to weld the weld seam of the adjacent wind turbine tower. Step 7: During the welding process, both the air compressor and the exhaust fan are working. The air compressor blows compressed air into the inner cavity of the air spray ring through the air inlet pipe. The compressed air in the air spray ring is directionally sprayed out through the air spray holes set on it, forming an airflow curtain to block the end of the support structure. The exhaust fan works to remove excess smoke from inside the support structure. Step 8: After welding is completed, adjust the height of the welding torch using the lifting and fixing components until the welding torch moves above the movable part. Use the telescopic structure to move the movable part, which in turn moves the lower sealing ring until the lower sealing ring moves to the welding position. Use the first lifting structure to move the lower sealing ring to press the weld. At this time, the first support side ring, the second support side ring, the upper support ring, and the lower sealing ring together form a ring-shaped pressing support structure that is compatible with the weld of the wind turbine tower.

[0016] Preferably, a wind turbine tower weld welding device is applied to a wind turbine tower weld welding method.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The welding device and method for wind turbine tower welds utilize a support structure to press and support the weld, reducing welding deformation, enhancing weld stability, and providing a stable welding platform for workers, ensuring the stable fixation of welding equipment and personnel during operation. When the wind turbine tower rotates, there is no need to frequently move the welding device or adjust the working position, avoiding problems such as equipment displacement and repetitive personnel positioning caused by tower rotation. This makes welding operations more precise, helps ensure welding quality, and improves welding efficiency.

[0018] 2. The welding device and method for the wind turbine tower weld seams utilize an airflow curtain formed by the jet ring to intercept welding spatter, preventing it from splashing onto the inner wall of the wind turbine tower and thus avoiding burns and contamination. This also prevents spatter from injuring operators. The exhaust fan removes excess fumes from the support structure, reducing the harm of welding fumes to operators and ensuring their health and safety. Attached Figure Description

[0019] Figure 1 A schematic diagram of a welding device for wind turbine tower weld seams provided by the present invention; Figure 2 The structure of this invention Figure 1 Rear view illustration; Figure 3 The structure of this invention Figure 1 Diagram showing the view from below; Figure 4 This is a schematic diagram illustrating the use of the present invention; Figure 5 This is an exploded view of the connecting plate under the structure of the present invention; Figure 6 This is a schematic diagram of the connecting plate and its connection structure in the present invention; Figure 7 A flowchart of a welding method for wind turbine tower weld seams provided by the present invention.

[0020] In the diagram: 1. Fixed frame; 2. Linear movement structure; 3. First support rod; 4. First arc-shaped plate; 5. Drive gear; 6. Second arc-shaped plate; 7. Second support side ring; 8. Air jet ring; 9. Air compressor; 10. Suction ring; 11. Exhaust fan; 12. Positioning plate; 13. Movable part; 14. Main body of welding device; 15. Movable platform; 16. First lifting structure; 17. Fixed part; 18. Air inlet pipe; 19. Air outlet pipe; 20. Upper connecting plate; 21. Support plate; 22. Welding window; 23. Lower sealing ring; 24. First support side ring; 25. Upper support ring; 26. Positioning groove; 27. Telescopic structure; 28. Positioning slider; 29. ​​Lifting and fixing assembly; 30. Drive structure; 31. Ball screw; 32. Connecting sleeve; 33. First scale line; 34. Second support rod. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides one embodiment: Please refer to Figures 1-6 A welding device for wind turbine tower welds includes a fixed frame 1 connected to the ground, a support structure located inside the wind turbine tower, and a welding device body 14. The support structure is modularly designed and includes a first arc-shaped plate 4 adapted to the inner wall of the wind turbine tower, a second arc-shaped plate 6 adapted to the inner wall of the wind turbine tower, an upper connecting plate 20 and a lower connecting plate connected to the first arc-shaped plate 4 via a connecting structure. The first arc-shaped plate 4 and the second arc-shaped plate 6 are connected to the fixed frame 1 via a linear movement structure 2. A first support rod 3 is connected to the inner wall of the first arc-shaped plate 4, and a second support rod 34 is connected to the inner wall of the second arc-shaped plate 6. Both the first support rod 3 and the second support rod 34 are connected to the linear movement structure 2. In embodiment 1, the linear movement structure 2 includes a double-ended ball screw movably connected to the fixed frame 1 and a servo motor driving the double-ended ball screw to rotate. Each end of the outer ring is equipped with a first ball nut that is compatible with it. The servo motor is connected to the double-ended ball screw through a reducer and a coupling. The double-ended ball screw and the first ball nut form a high-precision ball screw pair. When the servo motor drives the double-ended ball screw to rotate, the first ball nut that is compatible with the double-ended ball screw moves in the direction of the double-ended ball screw, and the two first ball nuts move in opposite directions. The first ball nut is connected to the first support rod 3 or the second support rod 34. When the first ball nut moves, it can drive the first support rod 3 or the second support rod 34 connected to it to move. The first support rod 3 can drive the first arc plate 4 connected to it to move, and the second support rod 34 can drive the second arc plate 6 connected to it to move. Thus, through the linear movement structure 2, the first arc plate 4 and the second arc plate 6 can move synchronously.

[0023] The support structure also includes a positioning component, which includes a positioning plate 12 and a first scale line 33. The positioning plate 12 is movably sleeved on the outer side of both the first support rod 3 and the second support rod 34. The first scale line 33 is provided on one side of both the first support rod 3 and the second support rod 34. The positioning plate 12 is in contact with the first scale line 33. In use, the first scale line 33 allows the operator to quickly determine the distance between the positioning plate 12 and the middle of the support structure. The distance between the positioning plate 12 and the middle of the support structure is the distance between the positioning plate 12 and the weld. After the positioning plate 12 is positioned correctly, the operator can use bolts to connect the positioning plate 12 to the first support rod 3 or the second support rod 34 to fix the bolt position.

[0024] In addition, the top of the positioning plate 12 is also provided with a second scale line, which is perpendicular to the first scale line 33. The first scale line 33 is set along the length of the wind turbine tower and is used to determine the depth of the support structure inserted into the wind turbine tower. The second scale line is set along the width of the wind turbine tower and is used to determine the distance between the support structure and the inner wall of the wind turbine tower. Using the second scale line on the top of the positioning plate 12, the operator can determine the distance between the first support rod 3 or the second support rod 34 and the inner wall of the wind turbine tower, which makes it easier for the operator to adjust the position of the support structure in the wind turbine tower. This ensures that the distance between the first arc plate 4 and the second arc plate 6 and the inner wall of the wind turbine tower is the same. As a result, when the first arc plate 4 and the second arc plate 6 are moved synchronously by the linear moving structure 2, the structural components on the outer walls of the first arc plate 4 and the second arc plate 6 can contact the inner wall of the wind turbine tower synchronously.

[0025] The connecting structure includes a support plate 21 connected to the first arc-shaped plate 4 and a second lifting structure connected to the support plate 21. The moving end of the second lifting structure is connected to the middle of the bottom of the upper connecting plate 20. The height of the upper connecting plate 20 can be changed by using the second lifting structure. When in use, under the action of the second lifting structure, one end of the upper connecting plate 20 contacts and aligns with the end of the first arc-shaped plate 4 near the second arc-shaped plate 6, and the other end of the upper connecting plate 20 contacts and aligns with the end of the second arc-shaped plate 6 near the first arc-shaped plate 4. At this time, the upper connecting plate 20, the first arc-shaped plate 4 and the second arc-shaped plate 6 can form an arc-shaped structure. When stored, the upper connecting plate 20 can be moved to below the end of the first arc-shaped plate 4 near the second arc-shaped plate 6. The upper connecting plate 20, the first arc-shaped plate 4 and the second arc-shaped plate 6 are all in a staggered state, leaving a gap for the translation of the first arc-shaped plate 4 and the second arc-shaped plate 6.

[0026] In embodiment 2, the second lifting structure includes a ball screw 31 movably connected to the support plate 21, a second ball nut adapted to the ball screw 31, a drive structure 30 connected to the support plate 21, and a connecting sleeve 32 connected to the second ball nut. The ball screw 31 and the second ball nut form a high-precision ball screw pair. The drive structure 30 is a servo motor. The output shaft end of the drive structure 30 is connected to a drive gear 5 through a reducer and a coupling. The bottom end of the ball screw 31 is connected to a transmission gear. The drive gear 5 and the transmission gear are meshed. When the drive structure 30 is working, it can drive the drive gear 5 connected to it to rotate. The drive gear 5 can drive the ball screw 31 to rotate through the transmission gear meshing with it. When the ball screw 31 rotates, the second ball nut that is adapted to it can move in the direction of the ball screw 31. When the second ball nut moves, it can drive the connecting sleeve 32 to move. The ball screw 31 is movably connected to the inner cavity of the connecting sleeve 32. The top of the connecting sleeve 32 is connected to the middle of the bottom of the upper connecting plate 20. When the connecting sleeve 32 moves, it can drive the upper connecting plate 20 to move.

[0027] Furthermore, the second lifting structure has a self-locking function. A stopper is installed on the output shaft of the drive structure 30 to lock the transmission link when the machine stops. The second ball nut also has a self-locking function. After the second ball nut moves into position, the locking device on the second ball nut locks the nut and restricts its movement. For example, a wedge block is added inside the second nut. During normal transmission, the wedge block does not work. When the machine stops, the wedge block weds into the space between the ball and the raceway under the action of the spring force, and mechanically locks the ball to prevent it from rolling, thereby locking the position of the second nut.

[0028] Both the first arc-shaped plate 4 and the second arc-shaped plate 6 have a movable platform 15 at the bottom of their inner cavities for worker movement. The lower connecting plate includes a fixed part 17 and a movable part 13. The fixed part 17 is connected to a movable platform 15 via a first lifting structure 16, and the movable part 13 is connected to the fixed part 17 via a telescopic structure 27. A welding window 22 is provided in the middle of the movable part 13. In embodiment 3, both the first lifting structure 16 and the telescopic structure 27 are electric telescopic rods.

[0029] Specifically, the first lifting structure 16 is connected to the top of a movable platform 15. A fixed part 17 is connected to the bottom of the first lifting structure 16. A positioning groove 26 is provided on the side of the fixed part 17 near the welding window 22. A positioning slider 28, adapted to the positioning groove 26, is provided on the top of the movable part 13 near the fixed part 17. One end of the telescopic structure 27 is connected to the fixed part 17, and the other end of the telescopic structure 27 is connected to the positioning slider 28. Under the action of the telescopic structure 27, the position of the movable part 13 can change, and the position of the welding window 22 can be changed when the movable part 13 moves. The top of the fixed part 17 and the top of the movable part 13 away from the fixed part 17 are at the same height. In use, under the action of the first lifting structure 16, when the top of the lower connecting plate is at the same height as the top of the movable platform 15, the arc-shaped structure formed by the lower connecting plate, the upper connecting plate 20, the first arc-shaped plate 4, and the second arc-shaped plate 6 constitutes a circular support component. The movable platform 15 and the lower connecting plate form a welding platform.

[0030] When in use, the main body 14 of the welding device is placed on the welding platform. The top of the lower connecting plate is provided with a lifting and fixing component 29. The welding gun of the main body 14 of the welding device is fixed in position through the lifting and fixing component 29. When the main body 14 of the welding device is started, it can perform precise and continuous automated welding operations on the butt weld of adjacent wind turbine towers according to the preset welding parameters, ensuring that the weld formation quality and mechanical properties meet the design requirements and ensuring welding reliability.

[0031] As described above, this application allows for the rapid construction of a stable and reliable welding platform inside the wind turbine tower via a support structure. This platform provides a stable foundation for the welding device body 14, operators, and various welding auxiliary components (such as wire reels and gas supply devices), ensuring the stable fixation of welding equipment and personnel during operation. When the wind turbine tower rotates due to operational needs, there is no need to frequently move the welding device or adjust the work position, effectively avoiding problems such as equipment displacement and repetitive personnel positioning caused by tower rotation in traditional operation modes. This significantly improves welding safety and continuous operation efficiency. Furthermore, the support structure can shield the wind turbine tower, preventing spatter generated during welding from splashing onto the inner wall of the tower, eliminating the need for spatter cleaning steps and improving wind turbine tower production efficiency.

[0032] A first support ring 24 is connected to the middle of the outer wall of the first arc plate 4, a second support ring 7 is connected to the middle of the outer wall of the second arc plate 6, an upper support ring 25 is connected to the middle of the top of the upper connecting plate 20, a lower sealing ring 23 is provided at the bottom of the lower connecting plate, a lower sealing ring 23 is connected to the bottom of the movable part 13, and lower sealing rings 23 are provided on both sides of the welding window 22. The first support ring 24, the second support ring 7, the upper support ring 25, and the lower sealing ring 23 have the same thickness and the same outer diameter. When the movable part 13 moves, it can drive the lower sealing ring 23 to move. When the axes of the first support ring 24, the second support ring 7, the upper support ring 25, and the lower sealing ring 23 are aligned, they together form an annular pressing support structure that is compatible with the weld of the wind turbine tower. At this time, the distance between the positioning plate 12 and the middle of the annular pressing support structure is the same as the length of the wind turbine tower.

[0033] During welding, the arc-shaped pressing support structure formed by the first supporting side ring 24, the second supporting side ring 7, and the upper supporting ring 25 can press and support the weld. Through multi-point coordinated radial pressing action, it achieves precise support and stress dispersion for the weld area. This structure can effectively suppress defects such as lateral shrinkage, angular deformation, and radial bulging caused by welding thermal cycling, and significantly enhance the structural stability of the weld in the high-temperature molten state. At the same time, its closed-loop layout can block external interference factors such as welding spatter and fumes, providing a clean and stable working environment for welding operations and ensuring the continuity and reliability of the welding process. After welding, the position of the lower sealing ring 23 is changed by the telescopic structure 27, so that the lower sealing ring 23 presses and supports the weld at the welding site, forming a ring pressing support structure with the existing ring support system, further strengthening the overall weld's resistance to deformation, improving welding quality, and providing key structural protection for the long-term reliable operation of the wind turbine tower.

[0034] The present invention also includes an interception component, which includes a spray ring 8, a suction ring 10, an air compressor 9, and an exhaust fan 11. Both ends of the first arc plate 4 are provided with spray rings 8, and the air inlet end of the spray ring 8 is connected to the air outlet end of the air compressor 9 through an air inlet pipe 18. The two ends of the second arc plate 6 are provided with suction rings 10 at corresponding positions, and the air outlet end of the suction ring 10 is connected to the air inlet end of the exhaust fan 11 through an exhaust pipe 19. During the welding process, both the air compressor 9 and the exhaust fan 11 operate. The air compressor 9 blows compressed air into the inner cavity of the spray ring 8 through the air inlet pipe 18. The compressed air in the spray ring 8 is directionally ejected through the spray holes set on it, forming an airflow curtain to block the end of the support structure, thereby intercepting and cooling the welding spatter and preventing it from splashing onto the inner wall of the wind turbine tower, reducing the risk of heat radiation and adhesion from the spatter. The operation of the exhaust fan 11 removes excess fumes from inside the support structure. Through the synergistic effect of the airflow curtain and negative pressure exhaust, both physical interception and thermal management of welding spatter are achieved, as well as efficient purification of welding fumes, significantly improving the working environment inside the tower and ensuring welding quality and the health and safety of operators.

[0035] like Figure 7 As shown, the present invention provides a method for welding the weld seam of a wind turbine tower, and a welding device for welding the weld seam of a wind turbine tower is applied in the method, comprising the following steps: Step 1: Adjust the position of the positioning plate 12 according to the length of the wind turbine tower to be welded, so that the distance between the positioning plate 12 and the first support side ring 24, the second support side ring 7 or the upper support ring 25 is the same as the length of one wind turbine tower. Fix the position of the positioning plate 12 with bolts. Step 2: After the adjacent wind turbine towers are connected, move the fixed frame 1 and use the fixed frame 1 to drive the support structure to move in the inner cavity of the wind turbine tower until the positioning plate 12 is tightly attached to the wind turbine tower to be welded. At this time, the mid-section of the first support side ring 24, the second support side ring 7 and the upper support ring 25 are aligned with the vertical surface where the weld is located. The support structure moves to the preset position and fixes the fixed frame 1 in place. Step 3: The linear moving structure 2 simultaneously moves the first arc plate 4 and the second arc plate 6, and both the first arc plate 4 and the second arc plate 6 approach the weld until the first support side ring 24 and the second support side ring 7 are in contact with the weld. Step 4: Use the second lifting structure to move the upper connecting plate 20 upward until the upper support ring 25 is tightly attached to the top of the weld. At this time, the first support side ring 24, the second support side ring 7 and the upper support ring 25 form an arc-shaped structure that squeezes and supports the weld. Step 5: Use the first lifting structure 16 to move the lower connecting plate down until the bottom of the lower connecting plate is in close contact with the bottom of the weld. During the downward movement of the lower connecting plate, use the telescopic structure 27 to change the position of the movable part 13 until the welding window 22 is located at the welding station. At this time, the top of the lower connecting plate and the top of the two movable platforms 15 form a welding platform. Step 6: Place the main body 14 of the welding device on the welding platform, adjust and lock the spatial posture and working height of the welding gun of the main body 14 of the welding device using the lifting and fixing component 29, and use the main body 14 of the welding device to weld the adjacent wind turbine tower weld. Step 7: During the welding process, both the air compressor 9 and the exhaust fan 11 are working. The air compressor 9 blows compressed air into the inner cavity of the air spray ring 8 through the air inlet pipe 18. The compressed air in the air spray ring 8 is directionally sprayed out through the air spray holes set on it to form an airflow curtain to block the end of the support structure. The operation of the exhaust fan 11 removes excess smoke from inside the support structure. Step 8: After welding is completed, adjust the height of the welding torch using the lifting and fixing assembly 29 until the welding torch moves above the movable part 13. Use the telescopic structure 27 to move the movable part 13, and the movable part 13 will move the lower sealing ring 23 until the lower sealing ring 23 moves to the welding position. Use the first lifting structure 16 to move the lower sealing ring 23 to press the weld. At this time, the first support side ring 24, the second support side ring 7, the upper support ring 25 and the lower sealing ring 23 together form an annular pressing support structure that is compatible with the weld of the wind turbine tower.

[0036] All electrical components involved in this application are existing technologies. Those skilled in the art can select appropriate models of electrical components according to their needs. No restrictions or elaborations are made here. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies are connected by wires. According to the actual situation, appropriate controllers are selected to meet control requirements. For specific connections and control sequences, please refer to the description below. The electrical connections between each electrical component are completed in the order of their operation. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0037] In summary, this wind turbine tower weld seam welding device and method utilize a support structure to press and support the weld seam, reducing welding deformation, enhancing weld stability, and providing a stable welding platform for workers, ensuring the stable fixation of welding equipment and personnel during operation. When the wind turbine tower rotates, there is no need to frequently move the welding device or adjust the working position, avoiding problems such as equipment displacement and repetitive personnel positioning caused by tower rotation. This allows for more precise welding operations, helps ensure welding quality, and improves welding efficiency.

[0038] The airflow curtain formed by the jet ring 8 can intercept welding spatter, preventing it from splashing onto the inner wall of the wind turbine tower and thus preventing burns and contamination. It also prevents spatter from injuring operators. The exhaust fan 11 removes excess fumes from inside the support structure, reducing the harm of welding fumes to operators and ensuring their health and safety.

[0039] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional techniques such as bolt connection, which are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The materials and specifications of each component can be selected according to requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind tower welding device, comprising a fixed frame (1) connected with the ground, a support structure and a welding device main body (14) located in the wind tower, characterized in that: The support structure is modularly designed, comprising a first arc-shaped plate (4) adapted to the inner wall of the wind power tower drum, a second arc-shaped plate (6) adapted to the inner wall of the wind power tower, an upper connecting plate (20) connected to the first arc-shaped plate (4) through a connecting structure, and a lower connecting plate, the first arc-shaped plate (4) and the second arc-shaped plate (6) are connected to the fixed frame (1) through a linear movement structure (2), the middle part of the outer side wall of the first arc-shaped plate (4) is connected to the first support side ring (24), the middle part of the outer side wall of the second arc-shaped plate (6) is connected to the second support side ring (7), the middle part of the top of the upper connecting plate (20) is connected to the upper support ring (25), and the bottom of the lower connecting plate is provided with the lower sealing ring (23), when the four axes of the first support side ring (24), the second support side ring (7), the upper support ring (25) and the lower sealing ring (23) are aligned, they are collectively enclosed into a ring-shaped pressing support structure adapted to the weld of the wind power tower drum. The bottom end of the inner cavity of the first arc-shaped plate (4) and the second arc-shaped plate (6) is provided with a movable platform (15), the movable platform (15) and the lower connecting plate form a welding platform, the lower connecting plate comprises a fixed part (17) and a movable part (13), the fixed part (17) is connected to one movable platform (15) through a first lifting structure (16), the movable part (13) is connected to the fixed part (17) through a telescopic structure (27), and the middle part of the movable part (13) is provided with a welding window (22).

2. A wind turbine tower welder as claimed in claim 1, wherein: The inner wall of the first arc-shaped plate (4) is connected with a first support rod (3), the inner wall of the second arc-shaped plate (6) is connected with a second support rod (34), and the first support rod (3) and the second support rod (34) are connected with the linear movement structure (2).

3. A wind turbine tower welder as claimed in claim 2, wherein: The support structure further comprises a positioning assembly, the positioning assembly comprises a positioning plate (12) and a first scale line (33), the outer side of the first support rod (3) and the second support rod (34) is movably sleeved with the positioning plate (12), the positioning plate (12) is connected with the first support rod (3) or the second support rod (34) through bolts, one side of the first support rod (3) and the second support rod (34) is provided with the first scale line (33), and the positioning plate (12) is in contact with the first scale line (33).

4. The wind turbine tower welder of claim 1, wherein: The welding device body (14) is placed on the welding platform, the top of the lower connecting plate is provided with a lifting fixing assembly (29), and the welding gun of the welding device body (14) is fixed in position through the lifting fixing assembly (29).

5. The windmill tower welder of claim 1, wherein: It also comprises an intercepting assembly, the intercepting assembly comprises a wind jet ring (8), a wind suction ring (10), an air compressor (9) and an air extractor (11), both ends of the first arc-shaped plate (4) are provided with the wind jet ring (8), the air inlet end of the wind jet ring (8) is connected with the air outlet end of the air compressor (9) through an air inlet pipe (18); the wind suction ring (10) is arranged at the corresponding position of the two ends of the second arc-shaped plate (6), and the air outlet end of the wind suction ring (10) is connected with the air inlet end of the air extractor (11) through an air exhaust pipe (19).

6. A wind turbine tower welder as claimed in claim 1, wherein: The connecting structure comprises a support plate (21) connected with the first arc-shaped plate (4) and a second lifting structure connected with the support plate (21), and the moving end of the second lifting structure is connected with the middle part of the bottom of the upper connecting plate (20).

7. A wind turbine tower welder as claimed in claim 3, wherein: The distance value between the positioning plate (12) and the middle part of the annular pressing support structure is the same as the length value of the wind power tower drum.

8. A wind turbine tower welder as claimed in claim 1, wherein: The top of the fixed part (17) and the top of the end of the movable part (13) away from the fixed part (17) are at the same height, the lower sealing ring (23) is connected with the bottom of the movable part (13), and the two sides of the welding window (22) are provided with lower sealing rings (23).

9. A method of welding a wind turbine tower weld, characterized in that, The method comprises the following steps: Step one, adjust the position of the positioning plate (12) according to the length value of the wind power tower drum to be welded, so that the distance value between the positioning plate (12) and the first support side ring (24), the second support side ring (7) or the upper support ring (25) is the same as the length value of a wind power tower drum, and the position of the positioning plate (12) is fixed by using a bolt; Step two, after the butt joint of the adjacent wind power tower drums is completed, the fixed frame (1) is moved, the support structure is moved in the inner cavity of the wind power tower drum by using the fixed frame (1), until the positioning plate (12) is closely attached to the wind power tower drum to be welded, at this time, the middle section of the first support side ring (24), the second support side ring (7) and the upper support ring (25) is aligned with the vertical plane of the weld, the support structure is moved to the preset position, and the position of the fixed frame (1) is fixed; Step three, the first arc-shaped plate (4) and the second arc-shaped plate (6) are moved by the linear moving structure (2), the first arc-shaped plate (4) and the second arc-shaped plate (6) are close to the weld, until the first support side ring (24) and the second support side ring (7) are attached to the weld; Step four, the upper connecting plate (20) is moved upward by using the second lifting structure, until the upper support ring (25) is closely attached to the top of the weld, at this time, the first support side ring (24), the second support side ring (7) and the upper support ring (25) form an arc-shaped structure for pressing and supporting the weld; Step five, the lower connecting plate is moved downward by using the first lifting structure (16), until the bottom of the lower connecting plate is closely attached to the bottom of the weld, and in the process of moving downward of the lower connecting plate, the position of the movable part (13) is changed by using the telescopic structure (27), until the welding window (22) is located at the welding station, at this time, the top of the lower connecting plate and the top of the two movable platforms (15) form a welding platform; Step six, the welding device main body (14) is placed on the welding platform, the space posture and the working height of the welding gun of the welding device main body (14) are adjusted and locked by using the lifting fixing assembly (29), and the weld of the adjacent wind power tower drums is welded by using the welding device main body (14); Step seven, during the welding process, the air compressor (9) and the air extractor (11) work, the air compressor (9) blows compressed air into the inner cavity of the air jet ring (8) through the air inlet pipe (18), the compressed air in the air jet ring (8) is directionally jetted through the air jet holes arranged on the air jet ring (8), forming an air curtain wall for sealing the end of the support structure; the working of the air extractor (11) removes the excess flue gas in the support structure. Step eight, after the welding is completed, the height of the welding gun is adjusted by using the lifting fixing assembly (29) until the welding gun moves above the movable part (13), the movable part (13) is moved by using the telescopic structure (27), the movable part (13) drives the lower sealing ring (23) to move until the lower sealing ring (23) moves to the welding position, the lower sealing ring (23) is extruded by using the first lifting structure (16), at this time, the first supporting side ring (24), the second supporting side ring (7), the upper supporting ring (25) and the lower sealing ring (23) together enclose an annular pressing support structure which is adapted to the wind power tower drum weld.

10. The method of claim 9, wherein: The wind power tower drum weld welding device of claim 1 is applied to a wind power tower drum weld welding method.

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