Welding and positioning equipment for platform seam in wind power tower tube

Abstract

The invention discloses platform seam welding and positioning equipment in a wind power tower, and relates to the related technical field of welding equipment manufacturing, the platform seam welding and positioning equipment comprises an arranged storage table, a positioning assembly is installed on the storage table, the positioning assembly comprises a support installed on the storage table, and a telescopic air cylinder is arranged on the support; the output end of the telescopic air cylinder is connected with a lifting plate, a flexible bag is arranged below the lifting plate, a supporting seat is arranged in the storage table, and a magnetic suction plate is installed on the upper surface of the supporting seat. According to the welding and positioning equipment for the platform seam in the wind power tower barrel, flexible limiting and positioning of the platform plate are achieved through expansion of the flexible bag, buckling deformation of the platform plate in the subsequent welding process is avoided, the surface flatness of the platform plate is guaranteed, the contact ring is connected with the electromagnetic structure and the magnetic suction plate through the wire, and the magnetic suction plate is powered on to generate magnetic force; and the bottom of the platform plate is adsorbed and fixed, the positioning effect is further enhanced, and the overall welding quality is improved.

Description

Technical Field

[0001] This invention relates to the technical field of welding equipment manufacturing, specifically to a welding positioning device for platform seams inside wind turbine towers. Background Technology

[0002] The internal platform of the wind turbine tower is a core component that ensures the internal support and maintenance of the tower. Its welding quality directly affects the overall structural stability and service life of the tower. Existing welding positioning and welding equipment generally suffer from complex structures and inconvenient adjustments, making it difficult to quickly adapt to workpieces of different specifications, resulting in low welding efficiency.

[0003] To overcome the aforementioned deficiencies, existing technology 1 (Chinese patent No. CN216858686U, published on July 1, 2022) describes a platform-based automatic straight seam welding machine, relating to the field of welding machine equipment technology. This platform-based automatic straight seam welding machine includes: a main body with a mounting box fixedly connected to its top; a purification mechanism mounted on the main body; and an adjustment mechanism comprising left-right, front-back, and up-down adjustment components. The left-right adjustment components are mounted on the main body and can quickly position and fix the workpiece using a front and rear positioning rod, a suction cup, and an electromagnetic induction device. The left-right, front-back, and up-down adjustment components allow for multi-directional adjustment of the welding torch, providing good flexibility, improving welding efficiency, and effectively ensuring the stability of the workpiece welding quality. A dust collector collects the gases generated during operation. The fumes generated during welding are collected, purified, and discharged. The system can promptly capture and treat these fumes, protecting the environment. Existing technology two (Chinese patent CN112222727B, published on January 14, 2025) describes a positioning platform and welding equipment. The positioning platform includes a base plate, a first clamp, and a side plate assembly. The side plate assembly includes a first side plate and a second side plate, distributed on both sides of the first clamp. A second clamp is mounted on the side plate assembly. The positioning platform improves positioning accuracy through the limiting effect of the first clamp and the side plate assembly in two directions. Simultaneously, when the workpiece to be welded is assembled and positioned vertically, the clamping effect of the second clamp prevents the workpiece from shifting or collapsing, enhancing the reliability of fixing the workpiece, reducing the difficulty of manual positioning, and improving assembly efficiency.

[0004] Although existing technologies use clamping and welding structures to achieve rapid clamping and welding operations, their rigid clamping method is prone to causing local stress concentration in the workpiece. After welding thermal deformation, it is easy to cause platform plate warping and poor flatness. In addition, the clamping method is simple and the overall positioning stability of the workpiece is insufficient, which can easily lead to a decline in the overall welding quality.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on existing equipment for welding and positioning platform seams inside wind turbine towers. Therefore, we propose that equipment for welding and positioning platform seams inside wind turbine towers can effectively solve these problems. Summary of the Invention

[0006] The purpose of this invention is to provide a welding positioning device for platform seams inside wind turbine towers, in order to solve the problems mentioned in the background art. Currently, the market uses clamping and welding structures to achieve rapid clamping and welding operations, but the rigid clamping method is prone to causing local stress concentration on the workpiece. After welding thermal deformation, it is easy to cause platform plate warping and poor flatness. In addition, the clamping method is simple, the overall positioning stability of the workpiece is insufficient, and it is easy to cause a decline in the overall welding quality.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding positioning device for platform seams inside wind turbine towers, comprising a platform, a dual-axis motor mounted on the platform, a robotic arm connected to the first output end of the dual-axis motor via a moving structure, and a welding structure and a sensing structure mounted on the robotic arm; a positioning component mounted on the platform, the positioning component including a bracket mounted on the platform, a telescopic cylinder mounted on the bracket, a lifting plate connected to the output end of the telescopic cylinder, a flexible bladder below the lifting plate, a first conveying cylinder mounted on the bracket, a first piston penetrating through the first conveying cylinder, the first piston penetrating the bracket and connected to the upper surface of the lifting plate, the bottom side of the first conveying cylinder communicating with the inner cavity of the flexible bladder via a first pipe, a support base inside the platform, and a magnetic suction plate mounted on the upper surface of the support base.

[0008] Preferably, the bracket is connected to the shelf through a limiting cylinder, the limiting cylinder has a through hole at its side end, an adjusting component is connected through the limiting cylinder, and an abutting ball is installed at the bottom end of the adjusting component, the abutting ball and the through hole are at the same level.

[0009] Preferably, a storage tube is installed inside the storage platform, and a movable rod is connected through the side end of the storage tube. The movable rod passes through the side wall of the storage tube and is connected to a limiting ball, which is located inside the through hole.

[0010] Preferably, the storage tube is provided with an auxiliary component, which includes a limiting plate installed inside the storage tube, a moving rod passing through the limiting plate and connected to a contact block, and a tube plate installed on the outside of the moving rod, the tube plate being adapted to the inner diameter of the storage tube.

[0011] Preferably, the cylindrical plate is located on one side of the limiting plate, a spring is sleeved on the outside of the moving rod, a contact ring is installed inside the storage cylinder, the contact ring is located on the other side of the limiting plate, the contact ring is connected to the electromagnetic structure and the magnetic suction plate through a wire, and the upper end of the first conveying cylinder is connected to the side of the storage cylinder away from the contact block through a second pipe.

[0012] Preferably, the second output end of the dual-axis motor is connected to a turntable, a movable column is installed on the side of the turntable, a movable frame is installed on the shelf, an arc-shaped groove is opened on the movable frame, the movable column is connected inside the arc-shaped groove, movable plates are provided on both sides of the movable frame, a support frame is installed on the shelf, and the movable plates are all connected through the support frame.

[0013] Preferably, a second conveying cylinder is installed on the platform, and a second piston is connected through the inside of the second conveying cylinder. The second piston is connected to a movable plate on one side. A filter bucket is provided under the platform, and a filter screen is installed inside the filter bucket. The input end of the second conveying cylinder is connected to the inner cavity of the filter bucket through a pipe. The inner cavity of the filter bucket is connected to an air suction head through a pipe. The air suction head is located on the side of the welded structure and the sensing structure.

[0014] Preferably, a toothed rod is connected to a movable plate on the other side of the movable frame, and an air blowing assembly is provided on the shelf. The air blowing assembly includes a temporary storage box installed on the shelf, and a nozzle is installed on the surface of the temporary storage box.

[0015] Preferably, the side end of the temporary storage box is connected to a gear via a rotating shaft, the gear is meshed with the side end of the rack, and the output end of the second conveying cylinder is connected to the inner cavity of the temporary storage box via a pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This positioning equipment for welding platform seams inside wind turbine towers uses a flexible bladder expansion to achieve flexible positioning of the platform plate, preventing warping and deformation of the platform plate during subsequent welding, ensuring the flatness of the platform plate surface. The contact ring connects to the electromagnetic structure and the magnetic plate through a wire. The magnetic plate generates magnetic force when energized, adsorbing and fixing the bottom of the platform plate, further enhancing the positioning effect and improving the overall welding quality. The specific details are as follows:

[0017] (1) The lifting plate is pushed down by the telescopic cylinder so that the flexible bladder first contacts the upper surface of the platform plate. At the same time, the lifting plate drives the first piston to press down, press the gas in the first conveying cylinder into the flexible bladder to expand it, forming a flexible limiting and positioning structure to ensure the flatness of the platform plate surface and meet the welding accuracy requirements of the platform plate inside the wind turbine tower.

[0018] (2) The gas in the first conveying cylinder enters the storage cylinder through the second pipe, pushes the moving rod to drive the contact block to contact the contact ring, connects the electromagnetic structure and the magnetic suction plate, so that the magnetic suction plate generates magnetic force to attract the bottom of the platform plate, further ensuring the welding position accuracy and improving the stability and reliability of the welding quality.

[0019] (3) The gas in the first conveying cylinder changes the internal air pressure of the storage cylinder through the second pipe, pushes the moving rod to drive the limiting ball into the through hole of the limiting cylinder, realizes the stable connection between the bracket and the storage platform, and ensures the positioning and welding stability.

[0020] (4) The first output end of the dual-axis motor drives the positive and negative screws to rotate, so that the moving seat moves smoothly under the cooperation of the guide rod, and then drives the robotic arm to move. The sensing structure on the robotic arm can first accurately locate and detect the gap between the platform plates, accurately identify the welding start position, weld direction and width, and improve the welding quality and pass rate.

[0021] (5) The second output end of the dual-axis motor drives the turntable to rotate, and the moving frame moves back and forth through the cooperation of the moving column and the arc groove, spraying air through the nozzle to clean the residual fumes in the welding area. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall left-side structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the overall right-side structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter bucket of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the support base of the present invention;

[0027] Figure 6 This is a side view of the limiting cylinder structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the storage tube of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0030] Figure 9 This is a schematic diagram of the separate structure of the turntable and the moving frame of the present invention;

[0031] Figure 10 This is a schematic diagram of the connection structure between the rack and gear of the present invention.

[0032] In the diagram: 1. Storage platform; 2. Dual-axis motor; 3. Bracket; 4. Telescopic cylinder; 5. Lifting plate; 6. Flexible bladder; 7. First conveying cylinder; 8. First piston; 9. First pipe; 10. Support base; 11. Magnetic suction plate; 12. Storage cylinder; 13. Limiting cylinder; 14. Through hole; 15. Adjusting component; 16. Contact ball; 17. Moving rod; 18. Limiting ball; 19. Limiting plate; 20. Cylinder plate; 21. Contact block; 22. Spring; 23. Contact ring; 24. Wire; 25. Second pipe; 26. Turntable; 27. Moving column; 28. Moving frame; 29. ​​Arc groove; 30. Second conveying cylinder; 31. Filter bucket; 32. Toothed rod; 33. Gear; 34. Temporary storage box; 35. Nozzle. Detailed Implementation

[0033] 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.

[0034] Example 1: In this example, the contact ring 23 is connected to the electromagnetic structure and the magnetic plate 11 via the wire 24. The magnetic plate 11 generates magnetic force when energized, attracting and fixing the bottom of the platform plate, further enhancing the positioning effect. Figures 1-5The technical solution shown includes a platform 1, on which a dual-axis motor 2 is mounted. The first output end of the dual-axis motor 2 is connected to a robotic arm via a moving structure. The robotic arm is equipped with a welding structure and a sensing structure. A positioning assembly is mounted on the platform 1, including a bracket 3 mounted on the platform 1. A telescopic cylinder 4 is mounted on the bracket 3, and the output end of the telescopic cylinder 4 is connected to a lifting plate 5. A flexible bladder 6 is located below the lifting plate 5. A first conveying cylinder 7 is mounted on the bracket 3, and a first piston 8 is connected through the inside of the first conveying cylinder 7. The first piston 8 passes through the bracket 3 and is connected to the upper surface of the lifting plate 5. The bottom side of the first conveying cylinder 7 is connected to the inner cavity of the flexible bladder 6 via a first pipe 9. A support base 10 is provided inside the platform 1, and a [missing information - likely a device or component] is mounted on the upper surface of the support base 10. The magnetic suction plate 11 is used to place the platform plate inside the wind turbine tower to be welded onto the magnetic suction plate 11 of the placement platform 1. At this time, the telescopic cylinder 4 on the bracket 3 is activated according to the area of ​​the platform plate. The telescopic cylinder 4 pushes the lifting plate 5 downward. During the downward movement of the lifting plate 5, on the one hand, the flexible bladder 6 at its bottom first contacts the upper surface of the platform plate, and on the other hand, the upper surface of the lifting plate 5 drives the first piston 8 to move downward inside the first conveying cylinder 7, forcing the gas in the first conveying cylinder 7 into the inner cavity of the flexible bladder 6 through the first pipe 9, causing the flexible bladder 6 to expand, thereby achieving flexible limiting and positioning of the platform plate, avoiding warping and deformation of the platform plate during subsequent welding, ensuring the flatness of the platform plate surface, and at the same time, the flexible contact can prevent damage to the surface of the platform plate, protecting the appearance quality of the workpiece. A negative pressure is created inside, causing the gas on the side of the storage cylinder 12 away from the contact block 21 to be transported to the first conveying cylinder 7 through the second pipe 25. This changes the internal air pressure of the storage cylinder 12, pushing the cylinder plate 20 to move the moving rod 17 towards the contact ring 23. The moving rod 17 passes through the limiting plate 19, causing the contact block 21 to contact the contact ring 23. At this time, the contact ring 23 is connected to the electromagnetic structure and the magnetic suction plate 11 through the wire 24. The electromagnetic structure control circuit energizes the magnetic suction plate 11 to generate magnetic force, adsorbing and fixing the bottom of the platform plate, further enhancing the positioning effect and improving the positioning efficiency. To ensure high overall welding quality, the dual-axis motor 2 starts, and its first output drives the moving structure to work. The moving structure consists of a positive and negative screw connected to the dual-axis motor 2 and a moving base. A guide rod runs through the moving base. The dual-axis motor 2 drives the positive and negative screw to rotate, so that the moving base moves smoothly with the help of the guide rod. The moving base drives the robotic arm to move. The sensing structure installed on the robotic arm first locates and detects the gap between the platform plates, which can accurately identify the welding position and avoid missed welding and incorrect welding. After determining the welding position, the robotic arm drives the welding structure to the gap to carry out the welding operation.

[0035] Example 2: In this example, rotating the adjusting member 15 causes the abutting ball 16 at the bottom of the adjusting member 15 to abut the limiting ball 18, and the limiting ball 18 completely moves out of the through hole 14, releasing the fixation between the bracket 3 and the shelf 1. The bracket 3 can be disassembled as needed, specifically as follows: Figures 3-8 As shown, the following is disclosed: A bracket 3 is connected to a shelf 1 via a limiting cylinder 13. A through hole 14 is provided on the side of the limiting cylinder 13. An adjusting component 15 is connected through the limiting cylinder 13. A contact ball 16 is installed at the bottom of the adjusting component 15, and the contact ball 16 is at the same level as the through hole 14. A shelf cylinder 12 is installed inside the shelf 1. A moving rod 17 is connected through the side of the shelf cylinder 12. The moving rod 17 passes through the side wall of the shelf cylinder 12 and is connected to a limiting ball 18. The limiting ball 18 is located inside the through hole 14. An auxiliary component is provided inside the shelf cylinder 12. The auxiliary component includes a limiting plate 19 installed inside the shelf cylinder 12. The moving rod 17 passes through the limiting plate 19 and is connected to a contact block 21. A cylindrical plate 20 is installed on the outside of the first conveying cylinder 7, which is compatible with the inner diameter of the storage cylinder 12. The cylindrical plate 20 is located on one side of the limiting plate 19. A spring 22 is sleeved on the outside of the moving rod 17. A contact ring 23 is installed inside the storage cylinder 12, located on the other side of the limiting plate 19. The contact ring 23 is connected to the electromagnetic structure and the magnetic suction plate 11 through the wire 24. The upper end of the first conveying cylinder 7 is connected to the side of the storage cylinder 12 away from the contact block 21 through the second pipe 25, which causes a change in the air pressure inside the storage cylinder 12. The spring 22 on the outside of the moving rod 17 deforms, and at the same time, the limiting ball 18 connected to the other end of the moving rod 17 is inserted into the through hole 14 on the side of the limiting cylinder 13. The limiting cylinder 13 passes through the bracket 3 and the storage cylinder 13. Platform 1 ensures a stable connection between the support 3 and the platform 1, preventing shaking during operation of the positioning components and facilitating quick installation and disassembly. Adjusting component 15 penetrates the limiting cylinder 13, with its bottom contact ball 16 at the same level as the through hole 14. At this point, the contact ball 16 does not contact the limiting ball 18, thus not affecting the locking and fixing of the limiting ball 18. After welding, the telescopic cylinder 4 is activated, pulling the lifting plate 5 upwards. The lifting plate 5 drives the first piston 8 upwards within the first conveying cylinder 7, creating negative pressure. Gas in the flexible bladder 6 flows back into the first conveying cylinder 7 through the first pipe 9, causing the flexible bladder 6 to contract and release the flexible limiting on the upper surface of the platform plate. The gas inside 7 flows back to the inside of the storage cylinder 12 through the second pipe 25, so that the air pressure inside the storage cylinder 12 returns to stability. The spring 22 rebounds, pushing the cylinder plate 20 to move the moving rod 17 away from the contact ring 23. The contact block 21 separates from the contact ring 23, the wire 24 is disconnected, the electromagnetic structure and the magnetic suction plate 11 are de-energized, the magnetic suction plate 11 loses its magnetic force, and releases the attraction to the bottom of the platform plate. When the moving rod 17 moves, it drives the limiting ball 18 to move into the storage cylinder 12. At this time, the adjusting component 15 is rotated so that the abutting ball 16 at the bottom of the adjusting component 15 abuts the limiting ball 18. The auxiliary limiting ball 18 is completely moved out of the through hole 14, releasing the fixation between the bracket 3 and the storage platform 1. The bracket 3 can be disassembled as needed.

[0036] Example 3: In this example, clean air is supplied into the inner cavity of the support base 10 through the output pipe of the second conveying cylinder 30 to assist in temperature regulation of the platform plate on the upper surface of the support base 10, reducing the heat generated during welding that could cause thermal deformation of the platform plate. Specifically, as follows... Figure 1 , Figure 9 and Figure 10As shown, the following is disclosed: a turntable 26 is connected to the second output end of the dual-axis motor 2; a movable column 27 is installed on the side of the turntable 26; a movable frame 28 is installed on the platform 1; an arc-shaped groove 29 is opened on the movable frame 28; the movable column 27 is connected inside the arc-shaped groove 29; movable plates are provided on both sides of the movable frame 28; a support frame is installed on the platform 1, and the movable plates are all connected through the support frame; a second conveying cylinder 30 is installed on the platform 1; a second piston is connected through the second conveying cylinder 30; the second piston is connected to a movable plate on one side; a filter hopper 31 is provided under the platform 1; a filter screen is installed inside the filter hopper 31; the input end of the second conveying cylinder 30 is connected to the filter hopper through a pipe. The inner cavity of filter hopper 31 is connected to the inner cavity of filter hopper 31 through a pipe. The air intake head is located on the side of the welded structure and the sensing structure. The moving plate on the other side of the moving frame 28 is connected to the toothed rod 32. An air blowing assembly is provided on the platform 1. The air blowing assembly includes a temporary storage box 34 installed on the platform 1. A nozzle 35 is installed on the surface of the temporary storage box 34. A gear 33 is connected to the side of the temporary storage box 34 through a rotating shaft. The gear 33 is meshed with the side of the toothed rod 32. The output end of the second conveying cylinder 30 is connected to the inner cavity of the temporary storage box 34 through a pipe. The second output end of the dual-axis motor 2 drives the turntable 26 to rotate. The moving column 27 on the side of the turntable 26 is embedded in the arc-shaped groove 29 of the moving frame 28. As the turntable 26 rotates, the moving column 27 slides within the arc-shaped groove 29, causing the moving frame 28 to move back and forth. Moving plates are installed on both sides of the moving frame 28, and a support frame is mounted on the platform 1. The moving plates pass through the support frame, serving as guides and limiters. One moving plate drives the second piston inside the second conveying cylinder 30 to move back and forth. The input end of the second conveying cylinder 30 is connected to the inner cavity of the filter bucket 31 via a pipe. A filter screen is installed inside the filter bucket 31, which is connected to the suction head via a pipe. The suction head is located at the side of the welding structure and the sensing structure, thus facilitating the intake of the fumes generated during welding into the filter bucket 31, where impurities are removed by the filter screen, avoiding... To prevent impurities from contaminating the welding area of ​​the platform plate and the surrounding environment, and to protect the health of operators and reduce the harm of fumes to the human body, clean air is obtained and enters the temporary storage box 34 through the output pipe of the second conveyor 30. The surface of the temporary storage box 34 is equipped with nozzles 35 to spray clean air, which facilitates further cleaning of residual fumes in the welding area. The movable plate on the other side is connected to a gear 32. When the movable plate moves back and forth, it drives the gear 32 to move back and forth. The gear 32 meshes with the gear 33 connected to the rotating shaft on the side of the temporary storage box 34, driving the gear 33 to rotate back and forth, which in turn drives the temporary storage box 34 to rotate around the rotating shaft, so that the spray range of the nozzles 35 is wider, improving the fume cleaning and temperature control effect.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding positioning device for platform seams inside wind turbine towers, comprising a platform (1), characterized in that, A dual-axis motor (2) is installed on the platform (1). The first output end of the dual-axis motor (2) is connected to the robotic arm through a moving structure. The robotic arm is equipped with a welding structure and a sensing structure. A positioning component is installed on the platform (1). The positioning component includes a bracket (3) installed on the platform (1). A telescopic cylinder (4) is provided on the bracket (3). The output end of the telescopic cylinder (4) is connected to a lifting plate (5). A flexible bladder (6) is provided under the lifting plate (5). A first conveying cylinder (7) is installed on the bracket (3). A first piston (8) is connected through the inside of the first conveying cylinder (7). The first piston (8) is connected through the bracket (3) to the upper surface of the lifting plate (5). The bottom side of the first conveying cylinder (7) is connected to the inner cavity of the flexible bladder (6) through a first pipe (9). A support seat (10) is provided inside the platform (1). A magnetic suction plate (11) is installed on the upper surface of the support seat (10).

2. The positioning equipment for welding platform seams inside wind turbine towers according to claim 1, characterized in that: The bracket (3) is connected to the platform (1) through a limiting tube (13). The limiting tube (13) has a through hole (14) on its side end. An adjusting component (15) is connected through the inside of the limiting tube (13). A contact ball (16) is installed at the bottom of the adjusting component (15). The contact ball (16) and the through hole (14) are at the same level.

3. The welding positioning equipment for platform seams inside wind turbine towers according to claim 2, characterized in that: The storage platform (1) is equipped with a storage tube (12), and a moving rod (17) is connected through the side of the storage tube (12). The moving rod (17) passes through the side wall of the storage tube (12) and is connected to a limiting ball (18). The limiting ball (18) is located inside the through hole (14).

4. The welding positioning equipment for platform seams inside wind turbine towers according to claim 3, characterized in that: The storage tube (12) is provided with an auxiliary component, which includes a limiting plate (19) installed inside the storage tube (12). The moving rod (17) passes through the limiting plate (19) and is connected to a contact block (21). A cylinder plate (20) is installed on the outside of the moving rod (17), and the cylinder plate (20) is adapted to the inner diameter of the storage tube (12).

5. The positioning equipment for welding platform seams inside wind turbine towers according to claim 4, characterized in that: The cylindrical plate (20) is located on one side of the limiting plate (19). A spring (22) is sleeved on the outside of the moving rod (17). A contact ring (23) is installed inside the storage cylinder (12). The contact ring (23) is located on the other side of the limiting plate (19). The contact ring (23) is connected to the electromagnetic structure and the magnetic suction plate (11) through the wire (24). The upper end of the first conveying cylinder (7) is connected to the side of the storage cylinder (12) away from the contact block (21) through the second pipe (25).

6. The welding positioning equipment for platform seams inside wind turbine towers according to claim 5, characterized in that: The second output end of the dual-axis motor (2) is connected to a turntable (26). A movable column (27) is installed on the side of the turntable (26). A movable frame (28) is installed on the platform (1). An arc groove (29) is opened on the movable frame (28). The movable column (27) is connected inside the arc groove (29). Movable plates are provided on both sides of the movable frame (28). A support frame is installed on the platform (1), and the movable plates are all connected through the support frame.

7. The welding positioning equipment for platform seams inside wind turbine towers according to claim 6, characterized in that: A second conveying cylinder (30) is installed on the platform (1). A second piston is connected through the inside of the second conveying cylinder (30). The second piston is connected to a movable plate on one side. A filter bucket (31) is provided under the platform (1). A filter screen is installed inside the filter bucket (31). The input end of the second conveying cylinder (30) is connected to the inner cavity of the filter bucket (31) through a pipe. The inner cavity of the filter bucket (31) is connected to the suction head through a pipe. The suction head is located on the side of the welded structure and the sensing structure.

8. The welding positioning equipment for platform seams inside wind turbine towers according to claim 7, characterized in that: The movable plate on the other side of the movable frame (28) is connected to a toothed rod (32). An air blowing assembly is provided on the shelf (1). The air blowing assembly includes a temporary storage box (34) installed on the shelf (1). A nozzle (35) is installed on the surface of the temporary storage box (34).

9. A welding positioning device for platform seams inside wind turbine towers according to claim 8, characterized in that: The temporary storage box (34) has a gear (33) connected to its side end via a rotating shaft. The gear (33) is meshed with the side end of the rack (32). The output end of the second conveying cylinder (30) is connected to the inner cavity of the temporary storage box (34) via a pipe.

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