Fan blade defect detection device based on X-ray back scattering

Abstract

The utility model relates to the field of fan blade defect detection, and discloses a fan blade defect detection device based on X-ray back scattering, which comprises a fan structure and is characterized in that a lifting structure and a detection structure are arranged, when a wind power generation blade needs to be subjected to defect detection, a threaded screw rod is driven to rotate by a waterproof motor, and the fan blade defect detection device is used for detecting the defect of the wind power generation blade. The detection structure integrally ascends and descends on one side of the wind power tower, meanwhile, the X-ray source and the receiver are located on the two sides of the blade through extension of the electric push rod, and the receiver receives back scattering signals and analyzes the strength and mode of the signals to recognize defects in the blade. After the detection is completed, the electric push rod is shortened to drive the X-ray source and the receiver to move towards the wind power tower, and the influence of the detection structure on the rotation of the fan blade is prevented, so that the purpose of automatically detecting the defects of the fan blade is achieved, and the detection precision is ensured.

Description

Technical Field

[0001] The utility model relates to the field of fan blade defect detection, in particular to a fan blade defect detection device based on X-ray backscattering. Background Art

[0002] Modern wind turbines are becoming more and more common, and many of the operating units are over ten years old. Various defects have occurred in the fan blades during long-term operation. Among them, cracks are typical defects directly related to the remaining life of the blades. The quality inspection of in-service fan blades is an important task.

[0003] According to the Chinese patent authorization announcement: CN220552791U, the disclosed multi-view fan blade defect detection device includes a support frame. In the utility model, a fixing mechanism is provided on the fan head, and the fixing mechanism is used to quickly position and fix the fan head with the fan blade body installed, making it more convenient to use. Moreover, the fixing mechanism is used to adjust the position of the fan head with the fan blade body installed. Then, the projector and the camera are used in cooperation to photograph the projection of the fan blade body, and the internal photograph is used to observe the fan head with the fan blade body installed for comparison, so as to facilitate detecting whether there are position deviations or shape defects in the fan blade body installed on the fan head, avoiding the influence on the use effect of the fan due to the position deviation or defect of the fan blade body, and avoiding the possibility of danger caused by using defective fans. However, there are still deficiencies in the use of this multi-view fan blade defect detection device. In the existing fan blade defect detection technology, traditional detection devices are generally applicable to small fan equipment. These devices can usually effectively identify defects on the blades. However, when faced with the blade detection of large wind turbines, these traditional methods are inadequate. The size and height of large fan blades require inspectors to climb to the blade surface manually for close inspection, which not only leads to low detection efficiency but also poses serious safety risks. Due to the high position of the blades, inspectors may face risks such as falling and slipping during the climbing process. At the same time, the uncertainty of the blade surface may also increase the difficulty of the detection work. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a fan blade defect detection device based on X-ray backscattering, which solves the problems that manual climbing to the blade surface for close inspection not only leads to low detection efficiency but also poses serious safety risks. Due to the high position of the blades, inspectors may face risks such as falling and slipping during the climbing process. At the same time, the uncertainty of the blade surface may also increase the difficulty of the detection work.

[0005] To achieve the above object, the utility model is realized through the following technical solutions: A fan blade defect detection device based on X-ray backscattering, comprising a fan structure, the fan structure includes a wind power tower and blades, a wind power generator is fixedly installed at the upper end of the wind power tower, the output end of the wind power generator is drivingly connected with the blades, a lifting structure is arranged on one side surface of the wind power tower, the lifting structure includes a lifting groove and a lifting block, a lifting groove is opened on one side of the wind power tower, a waterproof motor is fixedly connected to the inner bottom end of the lifting groove, the output end of the waterproof motor is drivingly connected with a threaded lead screw, the surface of the threaded lead screw is threadedly connected with a lifting block, a detection structure is installed on one side of the lifting block, the detection structure includes an X-ray source and a receiver, a fixed rod is fixedly connected to one side surface of the lifting block, electric push rods are installed at both ends of one side surface of the fixed rod, the output end of one electric push rod is drivingly connected with the X-ray source, and the output end of the other electric push rod is drivingly connected with the receiver;

[0006] A blocking structure is installed at the inner top end of the lifting groove, the blocking structure includes a blocking rod and a gear, a meshing tooth is fixedly connected to the upper end of the side surface of the threaded lead screw, a gear is rotatably connected to the inner top end of the lifting groove, a blocking rod is slidably connected through the inside of the lifting groove, and a clamping groove is opened on the lower surface of the blocking rod.

[0007] Preferably, a base is fixedly connected to the lower end of the wind power tower.

[0008] Preferably, a guardrail is fixedly connected to the upper surface of the base.

[0009] Preferably, the gear is rotatably connected to the inner upper end of the lifting groove through a rotating shaft.

[0010] Preferably, the threaded lead screw and the gear are meshed with each other through the meshing tooth.

[0011] Preferably, the gear and the blocking rod are meshed with each other through the clamping groove.

[0012] Preferably, a protection plate is fixedly connected to the upper end of one side surface of the wind power tower.

[0013] Preferably, both the waterproof motor and the electric push rod are electrically connected to the wind power generator. Beneficial effects

[0014] The utility model provides a fan blade defect detection device based on X-ray backscattering. Compared with the prior art, the following beneficial effects are achieved:

[0015] In the present utility model, through the provided lifting structure and detection structure, when it is necessary to detect the defects of the blades of wind power generation, the waterproof motor drives the threaded screw rod to rotate, thereby driving the lifting block to lift inside the lifting groove, enabling the overall detection structure to perform reciprocating up-and-down movements on one side of the wind power tower. At the same time, through the extension of the electric push rod, the X-ray source and the receiver are located on both sides of the blade, and the receiver receives the backscattered signal, analyzing the intensity and pattern of the signal to identify the defects inside the blade. After the detection is completed, the electric push rod shortens, driving the X-ray source and the receiver to move towards the direction of the wind power tower, preventing the detection structure from affecting the rotation of the wind turbine blade, thereby achieving the purpose of automatically detecting the defects of the wind turbine blade, and ensuring the detection accuracy;

[0016] 2. In the present utility model, through the provided blocking structure, when detecting the defects of the wind turbine blade, while the waterproof motor drives the threaded screw rod to rotate and the detection structure starts to descend on one side of the wind power tower, the engaging teeth drive the gear to rotate. The gear drives the blocking rod to extend forward through the card slot, and the blade is blocked by the blocking rod to prevent the blade from continuing to rotate and affecting the detection result. When the detection is completed, the waterproof motor drives the threaded screw rod to rotate in the reverse direction, causing the lifting block to slowly rise inside the lifting groove, while driving the gear to rotate in the reverse direction and making the blocking rod retract towards the rear end into the wind power tower. When the detection structure rises to the highest end, the blocking rod is completely retracted into the wind power tower, and the wind turbine blade rotates normally. Moreover, the detection structure is protected by the protective plate to prevent rainwater, etc. from damaging the X-ray source and the receiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a wind turbine blade defect detection device based on X-ray backscattering proposed by the present utility model;

[0018] Figure 2 is a wind turbine blade defect detection device based on X-ray backscattering proposed by the present utility model Figure 1 enlarged view of part A;

[0019] Figure 3 is a schematic diagram of another angle of a wind turbine blade defect detection device based on X-ray backscattering proposed by the present utility model;

[0020] Figure 4 is a wind turbine blade defect detection device based on X-ray backscattering proposed by the present utility model Figure 3 enlarged view of part B.

[0021] LEGEND DESCRIPTION:

[0022] 1. Fan structure; 101. Base; 102. Guardrail; 103. Wind power tower; 104. Wind turbine generator; 105. Blade; 2. Lifting structure; 201. Lifting groove; 202. Waterproof motor; 203. Threaded lead screw; 204. Lifting block; 3. Detection structure; 301. Fixed rod; 302. Electric push rod; 303. X-ray source; 304. Receiver; 4. Blocking structure; 401. Protection plate; 402. Biting teeth; 403. Rotating shaft; 404. Gear; 405. Blocking rod; 406. Card slot. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 - 4 , the present invention provides two technical solutions, specifically including the following embodiments: Embodiment

[0025] A defect detection device for a fan blade 105 based on X-ray backscattering, comprising a fan structure 1. The fan structure 1 includes a wind power tower 103 and a blade 105. A wind turbine generator 104 is fixedly installed at the upper end of the wind power tower 103. The output end of the wind turbine generator 104 is drivingly connected to the blade 105. Through the rotation of the blade 105, power is provided to the wind turbine generator 104, thereby achieving the purpose of wind power generation. A lifting structure 2 is provided on one side surface of the wind power tower 103. The lifting structure 2 includes a lifting groove 201 and a lifting block 204. A lifting groove 201 is formed on one side of the wind power tower 103. A waterproof motor 202 is fixedly connected to the inner bottom end of the lifting groove 201. The waterproof motor 202 can effectively prevent moisture from entering the motor interior during rainy and snowy weather, causing the motor to malfunction. The output end of the waterproof motor 202 is drivingly connected to a threaded lead screw 203. The surface of the threaded lead screw 203 is threadedly connected to the lifting block 204. A detection structure 3 is installed on one side of the lifting block 204. The detection structure 3 includes an X-ray source 303 and a receiver 304. A fixed rod 301 is fixedly connected to one side surface of the lifting block 204. Electric push rods 302 are installed at both ends of one side surface of the fixed rod 301. The output end of one electric push rod 302 is drivingly connected to the X-ray source 303, and the output end of the other electric push rod 302 is drivingly connected to the receiver 304. The X-ray source 303 and the receiver 304 are respectively arranged on both sides of the blade 105. When in use, the X-ray source 303 emits high-energy X-rays to penetrate the fan blade 105. When the rays encounter internal defects, scattering occurs, and the receiver 304 captures these scattered X-ray signals. By analyzing the intensity and distribution characteristics of the signals, the detection and imaging of internal defects of the blade 105 are achieved.

[0026] During operation, first start the waterproof motor 202. Drive the lifting block 204 to descend in the lifting groove 201 through the rotation of the threaded lead screw 203, so that the detection structure 3 rises to the predetermined positions on both sides of the blade 105. Subsequently, operate the electric push rod 302 to make it extend, and position the X-ray source 303 and the receiver 304 on both sides of the blade 105 respectively. The X-ray source 303 emits high-energy X-rays to penetrate the blade 105. When encountering internal defects, scattering occurs, and the receiver 304 captures the scattered X-ray signals. By analyzing the intensity and distribution characteristics of the signals, the detection and imaging of internal defects of the blade 105 are achieved. After the detection is completed, operate the electric push rod 302 to shorten, so that the X-ray source 303 and the receiver 304 return to their original positions to avoid affecting the normal rotation of the blade 105. Finally, turn off the waterproof motor 202. The lifting block 204 is at the highest position inside the lifting groove 201, and the recovery of the detection structure 3 is completed, and the entire defect detection process of the blade 105 ends. Embodiment

[0027] On the basis of Embodiment 1, a blocking structure 4 is installed at the inner top end of the lifting groove 201. The blocking structure 4 includes a blocking rod and a gear 404. The upper end of the side surface of the threaded lead screw 203 is fixedly connected with a meshing tooth 402. The gear 404 is rotatably connected to the inner top end of the lifting groove 201. When the threaded lead screw 203 rotates, it drives the gear 404 to rotate. The gear 404 drives the blocking rod 405 to slide, thereby realizing the linkage between structures. The blocking rod 405 is slidably connected through the inside of the lifting groove 201. A clamping groove 406 is formed on the lower surface of the blocking rod 405. The lower end of the wind power tower 103 is fixedly connected with a base 101. A guardrail 102 is fixedly connected to the upper surface of the base 101. The gear 404 is rotatably connected to the upper end inside the lifting groove 201 through a rotating shaft 403. By connecting the rotation of the threaded lead screw 203 and the sliding of the blocking rod 405 through the gear 404, a linkage is generated between the two. When the threaded lead screw 203 rotates to drive the lifting block 204 to descend and start detecting the defects of the blade 105, it drives the gear 404 to rotate, so that the blocking rod 405 extends out of the wind power tower 103 to block the blade 105. After the detection is completed, the threaded lead screw 203 rotates in the reverse direction to make the lifting block 204 rise to the highest point, and at the same time drives the gear 404 to rotate, and finally drives the blocking rod 405 to retract into the wind power tower 103 to complete the detection. The threaded lead screw 203 meshes with the gear 404 through the meshing tooth 402, and the gear 404 and the blocking rod 405 mesh with each other through the clamping groove 406. A protective plate 401 is fixedly connected to the upper end of one side surface of the wind power tower 103. The waterproof motor 202 and the electric push rod 302 are both electrically connected to the wind turbine generator 104. The waterproof motor 202 and the electric push rod 302 are both driven by the electric energy generated by the wind turbine generator 104;

[0028] When it is necessary to detect the defects of the fan blade 105, first start the waterproof motor 202 to drive the threaded lead screw 203 to rotate, thereby driving the gear 404 and the lifting block 204, so that the detection structure 3 starts to descend. At the same time, the rotation of the gear 404 makes the blocking rod 405 extend out of the clamping groove 406 to block the rotation of the blade 105 and ensure a stable detection environment. When the detection structure 3 reaches the predetermined positions on both sides of the blade 105, operate the electric push rod 302 to extend the X-ray source 303 and the receiver 304, start emitting X-rays and receiving backscattered signals, and analyze the internal defects of the blade 105. After the detection is completed, start the waterproof motor 202 in the reverse direction. The threaded lead screw 203 rotates in the reverse direction to drive the lifting block 204 to rise. At the same time, the gear 404 rotates in the reverse direction to make the blocking rod 405 retract into the wind power tower 103 to release the block on the blade 105. When the lifting block 204 rises to the highest point and the blocking rod 405 is completely retracted, the protective plate 401 plays a protective role for the detection structure 3 to protect the X-ray source 303 and the receiver 304 from the influence of the external environment. So far, the detection process of the fan blade 105 defects ends, and the blade 105 resumes normal rotation.

[0029] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the application shall be included within the protection scope of the present application.

Claims

1. A fan blade defect detection device based on X-ray backscattering, comprising a fan structure (1), characterized in that: The wind turbine structure (1) comprises a wind turbine tower (103) and blades (105); a wind turbine generator (104) is fixedly mounted on the upper end of the wind turbine tower (103); the output end of the wind turbine generator (104) is transmission-connected to the blades (105); a lifting structure (2) is provided on one side surface of the wind turbine tower (103); the lifting structure (2) comprises a lifting slot (201) and a lifting block (204); a lifting slot (201) is provided on one side of the wind turbine tower (103); a waterproof motor (202) is fixedly connected to the inner bottom end of the lifting slot (201); the output end of the waterproof motor (202) is transmission-connected to A threaded screw (203), the surface of the threaded screw (203) being threadedly connected to a lifting block (204), a detection structure (3) being installed on one side of the lifting block (204), the detection structure (3) comprising an X-ray source (303) and a receiver (304), a fixed rod (301) being fixedly connected to the surface of one side of the lifting block (204), electric push rods (302) being installed at both ends of the surface of one side of the fixing rod (301), an output end of one of the electric push rods (302) being transmission-connected to the X-ray source (303), and an output end of the other of the electric push rods (302) being transmission-connected to the receiver (304); A blocking structure (4) is installed at the top end of the lifting groove (201), and the blocking structure (4) comprises a stopper rod and a gear (404). The upper end of the side surface of the threaded screw (203) is fixedly connected to an engaging tooth (402). The top end of the lifting groove (201) is rotatably connected to the gear (404). A blocking rod (405) is slidably connected to the inside of the lifting groove (201), and a clamping groove (406) is provided on the lower surface of the blocking rod (405).

2. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: The lower end of the wind power tower (103) is fixedly connected to a base (101).

3. The fan blade defect detection device based on X-ray backscattering according to claim 2 is characterized in that: A guardrail (102) is fixedly connected to the upper surface of the base (101).

4. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: The gear (404) is rotatably connected to the inner upper end of the lifting slot (201) via a rotating shaft (403).

5. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: The threaded screw rod (203) meshes with the gear (404) via the meshing teeth (402).

6. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: The gear (404) and the blocking rod (405) are meshed with each other via a slot (406).

7. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: A protective plate (401) is fixedly connected to the upper end of one side surface of the wind power tower (103).

8. The fan blade defect detection device based on X-ray backscattering according to claim 1 is characterized in that: The waterproof motor (202) and the electric push rod (302) are both electrically connected to the wind generator (104).

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