A welding device for wind turbine blade repair

Abstract

The application discloses a welding device for wind turbine blade cracking repair, which comprises a blade to be repaired, a tool assembly is arranged at the bottom end of the blade to be repaired, a detection assembly is arranged at the upper end of the tool assembly, a welding assembly is arranged in the detection assembly, the tool assembly comprises a base, a strip plate is fixedly installed on the upper surface of one end of the base, a slide is formed above the strip plate, two clamping plates are movably connected to the slide formed by the strip plate, the clamping plates are symmetrically arranged left and right, threaded holes are formed at the bottom ends of the clamping plates, the threaded holes formed at the bottom ends of the clamping plates are oppositely arranged, a first lead screw is drivingly connected to the clamping plates by the threaded holes formed at the bottom ends of the clamping plates, a shaft body of the first lead screw is fixedly connected with a first motor, and the first motor is fixedly connected with the side surface of the strip plate. The welding device for wind turbine blade cracking repair has the functions of quickly finding and welding the crack position on the surface of the blade body, and simultaneously has the effect of cleaning the welding slag and dust impurities on the surface of the blade.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade repair equipment technology, and more specifically to a welding device for repairing cracked wind turbine blades. Background Technology

[0002] Wind power generation utilizes wind energy to drive the rotation of wind turbine blades. A speed increaser accelerates the rotation speed of the shaft, and the rotation speed and torque of the shaft are transmitted to the rotating shaft of the engine to achieve the power generation effect. Under current technology, in order to maximize the kinetic energy effect brought by wind, the blades of wind turbines are usually very large and hollow. During long-term use, cracks are prone to appear on the surface of wind turbine blades. Cracks allow the internal cavity of the blade to communicate with the outside air, which affects the power effect of wind driving the blade to rotate. Therefore, in order to continue to use cracked wind turbine blades, workers use welding equipment to weld the cracks on the wind turbine blades. However, the welding equipment under current technology has the following shortcomings when dealing with cracks on wind turbine blades.

[0003] First, because wind turbine blades are enormous relative to the human body and are extremely long, cracks on the blade surface cannot be quickly detected in a short time. Workers need to carefully search along the blade body. After finding the crack, workers need to hold a welding torch and use tools such as scaffolding to complete the welding work of the blade crack. Therefore, traditional wind turbine blade crack welding equipment cannot quickly find the location of the blade crack and is not convenient when welding the crack.

[0004] Secondly, during the operation of traditional wind turbine blade crack welding equipment, fine impurity particles such as welding slag or iron filings are generated and adhere to the blade surface. After the blade is repaired, it may need to be stored, so it is necessary to ensure a certain degree of cleanliness on the blade surface. However, traditional wind turbine blade crack welding equipment does not have the function of cleaning the blade body.

[0005] Therefore, there is a need to provide a welding device for repairing cracked wind turbine blades to solve the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding device for repairing cracked wind turbine blades, so as to solve the problems existing in the background art.

[0007] The present invention provides the following technical solution: a welding device for repairing cracked wind turbine blades, comprising a blade to be repaired, a tooling assembly at the bottom end of the blade to be repaired, a detection assembly at the upper end of the tooling assembly, and a welding assembly inside the detection assembly;

[0008] The tooling assembly includes a base, a strip plate fixedly mounted on the upper surface of one end of the base, a slide rail opened above the strip plate, two clamping plates movably connected to the slide rail of the strip plate, the clamping plates being symmetrical from left to right, threaded holes opened at the bottom ends of the clamping plates, the threaded holes at the bottom ends of the clamping plates rotating in opposite directions, a first lead screw being drivenly connected to the clamping plates via the threaded holes at the bottom ends, a first motor being fixedly connected to the shaft of the first lead screw, the first motor being fixedly connected to the side of the strip plate, a platform plate being fixedly connected to the outer side of the strip plate, two sliding grooves opened on the upper surface of the platform plate, a second lead screw being provided in each of the sliding grooves of the platform plate, a movable plate being drivenly connected to the second lead screw, the bottom end of the movable plate being movably connected to the sliding groove of the platform plate, and a high-pressure blower being fixedly mounted on the movable plate;

[0009] The detection assembly includes four support plates, each fixedly connected to one of the four corners of the base. A reciprocating screw is movably connected between the support plates on the same side of the base. A second pulley is fixedly connected to the shaft of each reciprocating screw. A synchronous belt drives between the second pulleys. A third motor is fixedly connected to a single shaft of each reciprocating screw. The third motor is fixedly connected to the outer side of the base. A power supply is fixedly installed on the side of the base and electrically connected to the third motor.

[0010] Furthermore, the shaft of the second lead screw is fixedly sleeved with a first pulley, and a transmission belt is connected between the first pulleys. A second motor is fixedly connected to one side of the shaft of the second lead screw. The second motor is fixedly connected to the outer side of the platform. A tail plate is fixedly installed on the upper surface of the other end of the base. A positioning pin is provided on the inner side of the tail plate. Sliding grooves are provided at the bottom ends of both sides of the base.

[0011] Furthermore, the reciprocating screw drive is connected to a detection frame, and there are two detection frames. The bottom of the detection frame has the same thread direction as the connection of the reciprocating screw. A ladder is fixedly installed on the outer side of the detection frame, and a horizontal plate is fixedly installed on the inner side of the detection frame. Wind power sensing components are evenly distributed and fixedly installed on the inner wall of the detection frame and the upper end of the horizontal plate. The mounting surface of the wind power sensing components has an inclined angle. Movable grooves are opened on the opposite surfaces of the detection frame and the horizontal plate. The welding assembly is movably installed between the detection frames using the opened movable grooves.

[0012] Furthermore, the wind power sensing component includes a mounting cylinder, a permanent magnet block is fixedly installed on the inner wall of the mounting cylinder, a rotor is movably sleeved inside the mounting cylinder, a carbon brush is installed on the shaft of the rotor, and a fan blade is fixedly installed at the end of the shaft of the rotor.

[0013] Furthermore, the wind power sensing component is electrically connected to a relay K, which includes an electromagnetic armature and a normally closed switch SB. The electrical output terminal of the wind power sensing component is electrically connected to the coil of the electromagnetic armature, and the electrical input terminal of the wind power sensing component is electrically connected to a power supply. The power supply is electrically connected to a third motor and controlled by a switch S1. The circuit of the third motor is electrically connected to the normally closed switch SB. The electrical input and output circuits of the wind power sensing component are switched and controlled by a bidirectional switch S2.

[0014] Furthermore, the welding assembly includes a movable component, on both sides of which a sliding shaft is fixedly installed. The sliding shaft is movably connected to the moving slots opened in the detection frame and the cross plate. A movable sleeve plate is movably sleeved inside the movable component. A movable shaft is fixedly sleeved at the center of the movable sleeve plate. A welding torch is fixedly installed at the bottom of the movable shaft. The welding torch is in a bent state. Sealing plates are fixedly installed at the upper and lower opening ends of the movable component. A bearing is fixedly sleeved at the center of the sealing plate. The shaft body of the movable shaft is fixedly sleeved with the bearing. A handle is fixedly installed at the upper end of the shaft body of the bearing.

[0015] The technical effects and advantages of this invention are as follows:

[0016] 1. The present invention includes a tooling assembly, a detection assembly, and a welding assembly. When the welding device for repairing cracked wind turbine blades is working, it utilizes the effect of blowing high-intensity air into the blade to cause high-pressure airflow to flow out from the crack on the outer side of the blade. Combined with the wind force, electromagnetic induction causes the relay K to control the welding equipment to stop moving at this point, thereby achieving the effect of quickly detecting and finding the location of the crack in the blade. It also works with the welding assembly and ladder frame to perform fast and flexible welding.

[0017] 2. The present invention is equipped with a detection component. After the welding work is completed, the welding device for repairing cracked wind turbine blades can use the reciprocating motion function of the detection component and the blowing effect of the wind power sensing component to achieve the effect of blowing away welding slag and dust impurities on the outer surface of the blade to be repaired, thereby ensuring the cleanliness of the blade surface. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the tooling assembly structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the positioning pin structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the reciprocating lead screw structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the detection component of the present invention;

[0023] Figure 6 This is a schematic diagram of the detection frame structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the wind sensing component of the present invention;

[0025] Figure 8 This is a schematic diagram of the welding assembly structure of the present invention;

[0026] Figure 9 This is a schematic cross-sectional view of the detection component of the present invention;

[0027] Figure 10 This is a schematic diagram of the relay K circuit control structure of the present invention.

[0028] The attached figures are labeled as follows: 1. Blade to be repaired; 2. Tooling assembly; 201. Base; 202. Strip plate; 203. Clamping plate; 204. First lead screw; 205. First motor; 206. Platform; 207. Second lead screw; 208. Movable plate; 209. High-pressure blower; 210. First pulley; 211. Transmission belt; 212. Second motor; 213. Tail plate; 214. Positioning pin; 3. Detection assembly; 301. Support plate; 302. Reciprocating lead screw; 303. Second pulley; 3 04. Synchronous belt; 305. Third motor; 306. Power supply; 307. Detection frame; 308. Ladder frame; 309. Horizontal plate; 310. Wind power sensor assembly; 3101. Mounting cylinder; 3102. Permanent magnet block; 3103. Rotor; 3104. Carbon brush; 3105. Fan blade; 4. Welding assembly; 401. Moving parts; 402. Sliding shaft; 403. Moving sleeve plate; 404. Moving shaft; 405. Welding torch; 406. Sealing plate; 407. Bearing; 408. Handle. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The welding device for repairing cracked wind turbine blades involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1The present invention provides a welding device for repairing cracked wind turbine blades, including a blade to be repaired 1, a tooling assembly 2 at the bottom end of the blade to be repaired, a detection assembly 3 at the upper end of the tooling assembly 2, and a welding assembly 4 inside the detection assembly 3.

[0031] In this embodiment, the tooling assembly 2 provides a clamping and positioning function. The tooling assembly 2 can be used to fix the blade 1 to be repaired, thereby facilitating subsequent welding processing. The detection assembly 3 can work with the tooling assembly 2 to quickly find cracks on the blade 1 to be repaired. Its specific working principle will be explained in detail later. The welding assembly 4 can realize flexible welding work.

[0032] Reference Figure 2 and Figure 3 The tooling assembly 2 includes a base 201. A strip 202 is fixedly mounted on the upper surface of one end of the base 201. A slide rail is provided above the strip 202. Two clamping plates 203 are movably connected to the slide rail of the strip 202. The clamping plates 203 are symmetrical. Each clamping plate 203 has a threaded hole at its bottom end, with the threaded holes at the bottom ends of the clamping plates 203 rotating in opposite directions. A first lead screw 204 is driven through the threaded holes at the bottom ends of the clamping plates 203. A first motor 205 is fixedly connected to the shaft of the first lead screw 204. The first motor 205 is fixedly connected to the side of the strip 202. A platform 206 is fixedly connected to the outer side of the strip 202. Two sliding grooves are provided on the upper surface of the platform 206. Each of the six slides is equipped with a second lead screw 207. The second lead screw 207 is connected to a movable plate 208. The bottom end of the movable plate 208 is movably connected to the slide of the platform 206. A high-pressure blower 209 is fixedly installed on the movable plate 208. The shaft of the second lead screw 207 is fixedly sleeved with a first pulley 210. The first pulleys 210 are connected by a transmission belt 211. A second motor 212 is fixedly connected to one side of the shaft of the second lead screw 207. The second motor 212 is fixedly connected to the outer side of the platform 206. A tail plate 213 is fixedly installed on the upper surface of the other end of the base 201. A positioning pin 214 is provided on the inner side of the tail plate 213. Sliding grooves are opened at the bottom ends of both sides of the base 201.

[0033] In this embodiment, the interface of the blade 1 to be repaired is placed between the clamping plates 203. The first motor 205 drives the first lead screw 204 to rotate, causing the two clamping plates 203 with different rotation directions to move towards each other, clamping and fixing the interface of the blade 1 to be repaired. The tail of the blade 1 to be repaired is fixed by the positioning pin 214. Through the above structure, the blade 1 to be repaired can be clamped and fixed. After the fixing is completed, the movable plate 208, the high-pressure blower 209 and the opening of the blade 1 to be repaired are aligned. The second motor 212 drives the second lead screw 207 to rotate, which can drive the movable plate 208 to fit the high-pressure blower 209 with the opening of the blade 1 to be repaired. The high-pressure blower 209 is started to blow air into the internal space of the blade 1 to be repaired. The high-pressure airflow will blow out from the surface crack of the blade 1 to be repaired. The stronger the blowing effect of the high-pressure blower 209, the stronger the airflow blown out from the outer surface crack of the blade 1 to be repaired.

[0034] Reference Figures 4-7 as well as Figure 10The detection component 3 includes four support plates 301, which are fixedly connected to the four corners of the bottom of the base 201. Reciprocating screws 302 are movably sleeved between the support plates 301 on the same side of the base 201. Second pulleys 303 are fixedly sleeved on the shafts of the reciprocating screws 302. Synchronous belts 304 drive the second pulleys 303 together. A third motor 305 is fixedly connected to a single shaft of the reciprocating screw 302. The third motor 305 is fixedly connected to the outer side of the base 201. The side of the base 201 is fixedly mounted... A power supply 306 is provided, which is electrically connected to a third motor 305. A reciprocating screw 302 drives a detection frame 307. There are two detection frames 307. The bottom of the detection frame 307 and the thread direction at the connection point of the reciprocating screw 302 are the same. A ladder 308 is fixedly installed on the outer side of the detection frame 307, and a horizontal plate 309 is fixedly installed on the inner side of the detection frame 307. Wind power sensing components 310 are evenly distributed and fixedly installed on both the inner wall of the detection frame 307 and the upper surface of the horizontal plate 309. The mounting surface of component 310 has an inclined angle. Movable slots are provided on the opposing surfaces of the detection frame 307 and the horizontal plate 309. The welding component 4 is movably mounted between the detection frame 307 using these movable slots. The wind-sensing component 310 includes a mounting cylinder 3101. A permanent magnet block 3102 is fixedly mounted on the inner wall of the mounting cylinder 3101. A rotor 3103 is movably sleeved inside the mounting cylinder 3101. A carbon brush 3104 is mounted on the shaft of the rotor 3103, and a fan blade 3105 is fixedly mounted at the end of the shaft of the rotor 3103. The wind power sensing component 310 is electrically connected to a relay K, which includes an electromagnetic armature and a normally closed switch SB. The electrical output terminal of the wind power sensing component 310 is electrically connected to the coil of the electromagnetic armature, and the electrical input terminal of the wind power sensing component 310 is electrically connected to a power supply 306. The power supply 306 is electrically connected to a third motor 305 and controlled by a switch S1. The circuit of the third motor 305 is electrically connected to the normally closed switch SB. The electrical input and output circuits of the wind power sensing component 310 are switched and controlled by a bidirectional switch S2.

[0035] In this embodiment, after closing S1 and engaging S2 with contact a, power supply 306 supplies power to the third motor 305. The third motor 305 drives the reciprocating screw 302 to rotate, which in turn drives the detection frame 307 to perform reciprocating detection motion around the blade 1 to be repaired. Since the inside of the blade 1 to be repaired is continuously blown in by the high-pressure blower 209, high-pressure airflow will flow out from the cracks on the outer surface of the blade 1 to be repaired. When the detection frame 307 moves to this point, the wind power sensing component 310 installed on the detection frame 307 and the cross plate 309 will sense the rotation, that is, the fan blade 3105 will rotate, driving the rotor 3103 to generate an induced current in conjunction with the permanent magnet block 3102. The induced current is adjusted to be consistent by the carbon brush 3104. The induced current flows through the electromagnetic armature of the relay K, causing it to attract and drive the relay. When the normally closed switch SB is disconnected, the circuit of the third motor 305 is broken, and the third motor 305 stops driving, causing the detection frame 307 to stop. After S1 is disconnected, the staff can use the ladder 308 and welding assembly 4 to perform crack welding work at this location. After the welding work is completed, S1 can be closed, and S2 can be connected to contact b. At this time, the circuit of the electromagnetic armature of relay K is broken, and the normally closed switch SB remains closed. The third motor 305 and the wind power sensing assembly 310 are driven by the power supply 306. The wind power sensing assembly 310 starts to rotate, generating wind and cooperating with the third motor 305 to drive the reciprocating screw 302 to drive the detection frame 307 to perform reciprocating blowing motion, thereby blowing away welding slag, dust and other impurities on the outer surface of the blade 1 to be repaired, thus achieving its cleaning effect.

[0036] Reference Figure 8 and Figure 9 The welding assembly 4 includes a movable part 401. Sliding shafts 402 are fixedly installed on both sides of the movable part 401. The sliding shafts 402 are movably connected to the moving slots opened in the detection frame 307 and the cross plate 309. A movable sleeve plate 403 is movably sleeved inside the movable part 401. A movable shaft 404 is fixedly sleeved at the center of the movable sleeve plate 403. A welding gun 405 is fixedly installed at the bottom of the movable shaft 404. The welding gun 405 is in a bent state. A sealing plate 406 is fixedly installed at both the upper and lower opening ends of the movable part 401. A bearing 407 is fixedly sleeved at the center of the sealing plate 406. The shaft of the movable shaft 404 is fixedly sleeved with the bearing 407. A handle 408 is fixedly installed at the upper end of the shaft of the bearing 407.

[0037] In this embodiment, the movable component 401 can move between the detection frames 307 via the sliding shaft 402. The staff can climb and stay around the blade 1 to be repaired using the ladder 308 to perform welding work. The welding height of the welding torch 405 can be controlled by the up and down movement of the movable sleeve 403 in the movable component 401. The curved welding torch 405 can be rotated by rotating the movable shaft 404, thereby allowing for fine adjustment of the welding position. Since the sensing direction of the wind power sensing component 310 is at an angle with both sides aligned, the welding position of the welding torch 405 can basically cover the crack position sensed here.

[0038] The working principle and beneficial effects of this invention are as follows: When the welding device for repairing cracked wind turbine blades is in operation, the interface of the blade to be repaired 1 is placed between clamping plates 203. The first motor 205 drives the first lead screw 204 to rotate, causing the two clamping plates 203 with different rotation directions to move towards each other, clamping and fixing the interface of the blade to be repaired 1. The tail of the blade to be repaired 1 is fixed by the positioning pin 214. Through the above structure, the blade to be repaired 1 can be clamped and fixed. After the fixing is completed, the movable plate 208, the high-pressure fan 209 are aligned with the opening of the blade to be repaired 1. The second motor 212 drives the second lead screw 207 to rotate, which can drive... The movable plate 208 fits the high-pressure blower 209 against the opening of the blade 1 to be repaired. When the high-pressure blower 209 is activated, it blows air into the internal space of the blade 1, causing high-pressure airflow to escape from the surface cracks of the blade 1. The stronger the blowing effect of the high-pressure blower 209, the stronger the airflow blown from the outer surface cracks of the blade 1. After closing S1 and engaging S2 with contact a, the power supply 306 supplies power to the third motor 305. The third motor 305 drives the reciprocating screw 302 to rotate, causing the detection frame 307 to perform reciprocating detection motion around the blade 1. Because the interior of the blade 1 is continuously filled with high-pressure air blown in by the high-pressure blower 209... Compressed air will flow out from the crack on the outer surface of the blade 1 to be repaired. When the detection frame 307 moves to this point, the wind power sensing component 310 installed on the detection frame 307 and the cross plate 309 will sense the rotation, that is, the fan blade 3105 will rotate, driving the rotor 3103 to generate an induced current in conjunction with the permanent magnet block 3102. The induced current is adjusted to be consistent by the carbon brush 3104. The induced current flows through the electromagnetic armature of the relay K, causing it to attract and drive the normally closed switch SB to move and open. At this time, the circuit of the third motor 305 is disconnected, the third motor 305 stops driving, causing the detection frame 307 to stop, and S1 is disconnected. After opening, the staff can use the ladder 308 and welding assembly 4 to perform crack welding work here. After the welding work is completed, S1 can be closed and S2 can be connected to contact b. At this time, the circuit where the electromagnetic armature of relay K is located is disconnected, and the normally closed switch SB is always closed. The third motor 305 and the wind power sensing assembly 310 are driven by the power supply 306. The wind power sensing assembly 310 starts to rotate to generate wind and cooperates with the third motor 305 to drive the reciprocating screw 302 to drive the detection frame 307 to perform reciprocating blowing motion, thereby blowing away the welding slag, dust and other impurities on the outer surface of the blade 1 to be repaired, thereby achieving its cleaning effect.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0041] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 device for repairing cracked wind turbine blades, characterized in that, The blade to be repaired (1) is provided with a tooling assembly (2) at the bottom end of the blade to be repaired (1), and a detection assembly (3) is provided at the upper end of the tooling assembly (2). A welding assembly (4) is provided inside the detection assembly (3). The tooling assembly (2) includes a base (201). A strip (202) is fixedly installed on the upper surface of one end of the base (201). A slide rail is provided above the strip rail (202). Two clamping plates (203) are movably connected to the slide rail of the strip rail (202). The clamping plates (203) are symmetrical from left to right. Threaded holes are provided at the bottom ends of the clamping plates (203). The threaded holes at the bottom ends of the clamping plates (203) rotate in opposite directions. A first lead screw (204) is connected to the clamping plates (203) via the threaded holes at the bottom ends. The shaft of the first lead screw (204) is... A first motor (205) is fixedly connected to the body. The first motor (205) is fixedly connected to the side of the strip (202). A platform (206) is fixedly connected to the outer side of the strip (202). Two sliding grooves are opened on the upper surface of the platform (206). A second lead screw (207) is provided in each of the sliding grooves of the platform (206). The second lead screw (207) is driven to connect to a movable plate (208). The bottom end of the movable plate (208) is movably connected to the sliding groove of the platform (206). A high-pressure blower (209) is fixedly installed on the movable plate (208). The detection component (3) includes four support plates (301) which are fixedly connected to the four corners of the bottom of the base (201). Reciprocating screws (302) are movably sleeved between the support plates (301) on the same side of the base (201). Second pulleys (303) are fixedly sleeved on the shafts of the reciprocating screws (302). Synchronous belts (304) are connected between the second pulleys (303). A third motor (305) is fixedly connected to a single shaft of the reciprocating screw (302). The third motor (305) is fixedly connected to the outer side of the base (201). A power supply (306) is fixedly installed on the side of the base (201). The power supply (306) is electrically connected to the third motor (305). 2) A detection frame (307) is connected to the transmission. There are two detection frames (307). The bottom of the detection frame (307) and the reciprocating screw (302) have the same thread direction. A ladder (308) is fixedly installed on the outer side of the detection frame (307). A horizontal plate (309) is fixedly installed on the inner side of the detection frame (307). Wind power sensing components (310) are evenly distributed and fixedly installed on the inner wall of the detection frame (307) and the upper end of the horizontal plate (309). The mounting surface of the wind power sensing component (310) has an inclined angle. The opposite surfaces of the detection frame (307) and the horizontal plate (309) are provided with moving grooves. The welding component (4) is movably installed between the detection frames (307) using the moving grooves.

2. The welding device for repairing cracked wind turbine blades according to claim 1, characterized in that: The shaft of the second lead screw (207) is fixedly sleeved with the first pulley (210), and the first pulley (210) is connected by a transmission belt (211). The shaft of the second lead screw (207) is fixedly connected to the second motor (212), and the second motor (212) is fixedly connected to the outer side of the platform (206). The upper surface of the other end of the base (201) is fixedly installed with a tail plate (213), and the inner side of the tail plate (213) is provided with a positioning pin (214). The bottom of both sides of the base (201) is provided with sliding grooves.

3. The welding device for repairing cracked wind turbine blades according to claim 2, characterized in that: The wind power sensing component (310) includes a mounting cylinder (3101), a permanent magnet block (3102) is fixedly installed on the inner wall of the mounting cylinder (3101), a rotor (3103) is movably sleeved inside the mounting cylinder (3101), a carbon brush (3104) is installed on the shaft of the rotor (3103), and a fan blade (3105) is fixedly installed at the end of the shaft of the rotor (3103).

4. The welding device for repairing cracked wind turbine blades according to claim 3, characterized in that: The wind power sensing component (310) is electrically connected to a relay K, which includes an electromagnetic armature and a normally closed switch SB. The electrical output terminal of the wind power sensing component (310) is electrically connected to the coil of the electromagnetic armature. The electrical input terminal of the wind power sensing component (310) is electrically connected to a power supply (306). The power supply (306) is electrically connected to a third motor (305) and controlled by a switch S1. The circuit of the third motor (305) is electrically connected to the normally closed switch SB. The electrical input and output circuits of the wind power sensing component (310) are switched and controlled by a bidirectional switch S2.

5. The welding device for repairing cracked wind turbine blades according to claim 1, characterized in that: The welding assembly (4) includes a movable part (401), and sliding shafts (402) are fixedly installed on both sides of the movable part (401). The sliding shafts (402) are movably connected to the moving slots opened in the detection frame (307) and the cross plate (309). A movable sleeve plate (403) is movably sleeved inside the movable part (401). A movable shaft (404) is fixedly sleeved at the center of the movable sleeve plate (403). A welding torch (405) is fixedly installed at the bottom of the movable shaft (404). The welding torch (405) is in a bent state. A sealing plate (406) is fixedly installed at the upper and lower opening ends of the movable part (401). A bearing (407) is fixedly sleeved at the center of the sealing plate (406). The shaft of the movable shaft (404) is fixedly sleeved with the bearing (407). A handle (408) is fixedly installed at the upper end of the shaft of the bearing (407).

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