Wind power blade appearance defect detection device and detection method thereof

Abstract

The invention relates to the technical field of wind power blade detection, and discloses a wind power blade appearance defect detection device and a detection method.The wind power blade appearance defect detection device comprises a base and a detection probe, a vertical plate is fixedly installed at the left end of the top face of the base, and a sliding plate is slidably connected to the front end of the top face of the base through an electric sliding rail; blades of different sizes and structures can be outwards supported or clamped and fixed through the clamping mechanism, and universality is improved; the rotating mechanism is matched with the detection probe to move, so that circumferential dead-angle-free detection is realized, and comprehensiveness is guaranteed; the cleaning mechanism is used for cleaning and blow-drying the blades before detection, removing stains and moisture and providing a clean environment for the probe to improve the precision; when the defect is detected, the gas transmission mechanism quickly blows the to-be-marked part dry, and the marking mechanism marks immediately, so that the time consumption for finding the defect in the later period is avoided; the liquid adding mechanism automatically supplements ink to the labeling mechanism, shutdown is reduced, and the process continuity is guaranteed; the positioning guide mechanism prevents the component from rotating and stably detects the component, and the turnover mechanism can drive the component to rotate by 180 degrees, so that the detection can be performed when the probe moves, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind turbine blade detection technology, in particular to a wind turbine blade appearance defect detection device and a detection method thereof. BACKGROUND

[0002] Under the background of global promotion of clean energy development, wind power, as a mature and widely used renewable energy technology, is rapidly rising and occupying an increasingly important position in the energy structure. Wind power, with its clean, sustainable, inexhaustible and other significant advantages, has become the key choice for many countries and regions to achieve energy transformation and sustainable development goals; The performance of the wind turbine blade, as the core component of the wind turbine generator set, directly determines the efficiency and stability of wind power generation. In order to ensure the stable and long-term effective use of the wind turbine blade, its appearance defects need to be detected after production. However, the existing wind turbine blade appearance defect detection device still has some defects, such as: The "wind turbine blade detection device provided with a pressing assembly and detection method" with application number CN202410878488.1 can only detect one side of the wind turbine blade, and it is difficult to achieve comprehensive, rapid and effective detection of the wind turbine blade. When one side of the wind turbine blade is detected, it needs to be turned over and clamped again, which is time-consuming and laborious, and the efficiency is low. At the same time, the defect cannot be immediately marked, which is not convenient for subsequent searching and processing, and increases the complexity and time cost of defect processing in the later stage; Therefore, in view of the above problems, the present application provides a wind turbine blade appearance defect detection device and a detection method thereof. SUMMARY

[0003] The present application aims to provide a wind turbine blade appearance defect detection device and a detection method thereof to solve the problems of incomplete detection, low efficiency and inconvenient defect marking of the existing detection device in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a wind turbine blade appearance defect detection device, comprising a base and a detection probe; The top surface of the base is fixedly installed with a vertical plate at the left end, and the top surface of the base is slidably connected with a sliding plate through an electric sliding rail at the front end. The top surface of the sliding plate is fixedly installed with a fixed plate, and the fixed plate is provided with a hollow pipe penetrating through the bearing. The top surface of the hollow pipe is fixedly installed with an electric telescopic rod, and the output shaft of the electric telescopic rod penetrates the hollow pipe. The output shaft end of the electric telescopic rod is fixedly installed with a machine box, and the detection probe is fixedly installed on the bottom surface of the machine box. The bottom surface of the machine box is installed with a distance measuring sensor; The upright plate is provided with a clamping mechanism for fixing wind turbine blades. The clamping mechanism is connected to the rotating mechanism. The left side of the chassis is provided with a cleaning mechanism. The inside of the chassis is provided with an air supply mechanism. The air supply mechanism is provided with a marking mechanism for marking defect points. The top of the marking mechanism is provided with a liquid filling mechanism. The hollow tube is equipped with a positioning and guiding mechanism and a flipping mechanism for reciprocating rotation of the hollow tube.

[0005] The above technical solution facilitates the flexible movement and height adaptive adjustment of the detection probe in space through the cooperation of electric slide rails, electric telescopic rods and distance sensors. At the same time, it can clamp and fix the wind turbine blades and then rotate them, thereby achieving comprehensive coverage detection of different areas of the wind turbine blades.

[0006] As a preferred embodiment of the present invention, the clamping mechanism includes a housing fixedly installed on the left side of the upright plate. A hydraulic cylinder is fixedly installed on the left side of the housing. The output shaft of the hydraulic cylinder movably passes through the upright plate. A cylinder is provided through the upright plate via a bearing. The axis of the hydraulic cylinder is collinear with the axis of the cylinder. The output shaft of the hydraulic cylinder passes through a circular hole opened in the center of the left side wall of the cylinder. A movable seat is rotatably installed at the end of the output shaft of the hydraulic cylinder. A plurality of movable plates are slidably connected to the inner left side of the cylinder in its radial direction. The inner side of the movable plate is rotatably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to the movable seat. A clamping seat is fixedly installed at the right end of the movable plate.

[0007] By adopting the above technical solution, it is easy to drive the moving seat through the hydraulic cylinder, and in combination with the connecting rod to drive the movable plate to slide radially, so that the clamping seat can flexibly realize two fixing methods of external support or clamping, thereby improving the flexibility of use.

[0008] As a preferred embodiment of the present invention, the rotating mechanism includes a first motor fixedly installed on the left side of the housing, and the output shaft of the first motor passes through the left side wall of the housing through a bearing. The shaft end of the first motor is keyed to a rotating shaft, and the rotating shaft is connected to a cylindrical drive via a chain drive device.

[0009] By adopting the above technical solution, the first motor can drive the cylinder to rotate via a chain transmission device, thereby driving the wind turbine blades that are clamped and fixed to rotate. Combined with the movement of the detection probe, it is possible to achieve blind-angle detection in the circumferential direction of the blades.

[0010] As a preferred embodiment of the present invention, the cleaning mechanism includes a mounting bracket fixedly installed on the lower left side of the chassis. A water spray pipe and an air spray pipe are installed sequentially from left to right on the front inner wall of the mounting bracket. Both the water spray pipe and the air spray pipe penetrate the rear side wall of the mounting bracket. The rear end of the water spray pipe is connected to an external water supply device through a water supply hose, and multiple high-pressure water nozzles are installed on the water spray pipe at equal intervals. The rear end of the air spray pipe is connected to an external air supply device through an air supply hose, and multiple high-pressure air nozzles are installed on the air spray pipe at equal intervals.

[0011] The above technical solution allows for rinsing the blade surface with high-pressure water nozzles from the spray pipe before testing to remove dust and other impurities, and then drying the blade surface with high-pressure air nozzles from the air jet pipe. This avoids impurities or water stains interfering with the recognition accuracy of the detection probe, and provides a clean surface environment for subsequent defect detection.

[0012] As a preferred embodiment of the present invention, the gas delivery mechanism includes a second motor fixedly installed on the bottom surface of the casing, and a threaded rod is keyed to the shaft end of the second motor. The top end of the threaded rod is connected to the inner top surface of the casing via a bearing. The threaded rod passes through the lifting frame and is threadedly connected to the lifting frame. The left and right end faces of the lifting frame are respectively longitudinally slidably connected to the left and right inner walls of the casing. A cylinder is fixedly installed on the inner top surface of the casing, and a sliding rod is longitudinally slidably connected to the bottom of the cylinder. The bottom end of the sliding rod is connected to the lifting frame. The top surface of the lowering frame is fixedly connected, and a piston is fixedly installed on the top surface of the sliding rod. The diameter of the piston matches the inner diameter of the cylinder. An electric heating plate is installed on the inner bottom surface of the cylinder. An air inlet pipe is fixedly connected to the bottom left end of the cylinder and passes through the left side wall of the machine box. A one-way air inlet valve is installed on the air inlet pipe. An air outlet pipe is fixedly connected to the bottom right end of the cylinder and passes through the bottom of the machine box. A one-way air outlet valve is installed on the air outlet pipe. A nozzle is fixedly connected to the bottom end of the air outlet pipe.

[0013] The above technical solution facilitates the movement of the lifting frame by driving the threaded rod with the second motor, and synchronously controls the sliding of the piston inside the cylinder; it can spray the hot air preheated by the electric heating plate onto the defect area through the nozzle to achieve rapid drying of the marked position and avoid blurry ink markings; it can also draw in gas through the air inlet pipe and preheat and store it during reset, preparing it for the next marking and improving marking efficiency.

[0014] As a preferred embodiment of the present invention, the marking mechanism includes a marking pen holder that is fixedly inserted through the lifting frame. The marking pen holder is provided with an ink guide pen core inside, and a marking pen tip is fixedly inserted through the bottom of the marking pen holder, with the top of the marking pen tip extending into the interior of the ink guide pen core.

[0015] The above technical solution facilitates the synchronous downward movement of the marking pen holder as the lifting frame descends, allowing the marking pen tip to directly touch the dried defect location. The marking is then accurately left by the ink-guiding pen core, achieving instant linkage between detection and marking. This avoids wasting time searching for defect locations later and reduces the difficulty of post-processing.

[0016] As a preferred embodiment of the present invention, the liquid addition mechanism includes a material cylinder fixedly installed on the top surface of the machine casing. A feed pipe with a valve is fixedly provided through the upper right side wall of the material cylinder, and the feed pipe is fixedly provided through the right side wall of the machine casing. A discharge pipe is fixedly provided through the bottom of the material cylinder, and the discharge pipe is movably sleeved with a marking pen holder. A fixing sleeve is fixedly installed on the inner top surface of the material cylinder, and a movable rod is slidably provided through the bottom of the fixing sleeve. The top surface of the movable rod is fixedly connected to the bottom end of a spring, and the top end of the spring is fixedly connected to the inner top surface of the fixing sleeve. The movable rod extends into the interior of the discharge pipe, and a sealing plug is fixedly installed at the bottom end of the movable rod. The diameter of the sealing plug matches the inner diameter of the discharge pipe. A top rod is provided below the sealing plug, and the top rod is fixedly installed on the inner wall of the marking pen holder.

[0017] The above technical solution allows for easy replenishment of the ink in the ink cartridge by raising the marking pen cylinder via the lifting frame when the ink in the ink cartridge is low. This causes the top rod to lift the sealing plug, enabling the ink in the cartridge to automatically flow to replenish the ink cartridge. After replenishment, the spring returns to its original position and pushes the sealing plug to stop the ink flow. Ink replenishment can be completed without disassembling the pen cylinder, reducing equipment downtime and ensuring the continuity of the testing process.

[0018] As a preferred technical solution of the present invention, the positioning and guiding mechanism includes a mounting frame fixedly installed on the upper right side of the upright plate, and the mounting frame is located above the fixed plate and sleeved on the outside of the hollow tube. Positioning strips are fixedly installed on the front and rear inner walls of the mounting frame, and a positioning block is movably arranged between the two positioning strips. The positioning block is a regular square prism, and the length of the base of the positioning block is equal to the distance between the two positioning strips.

[0019] By adopting the above technical solution, the rotation of the hollow tube can be restricted during the movement of the detection probe through the cooperation of the positioning strip and the square prism positioning block. At the same time, the movement of the positioning block can accurately trigger the meshing action of the subsequent flipping mechanism, thereby improving the stability and accuracy of the equipment operation.

[0020] As a preferred embodiment of the present invention, the flipping mechanism includes a fixed block fixedly installed on the bottom surface of a fixed plate, and a rotating rod is provided through the fixed block via a bearing. A driven bevel gear is coaxially fixedly installed at the front end of the rotating rod, and a transmission rod is provided on the front side of the driven bevel gear. The transmission rod passes through the vertical plate via a bearing, and the left end of the transmission rod is coaxially fixedly connected to the right end of the rotating shaft. A first driving bevel gear and a second driving bevel gear that mesh with the driven bevel gear are respectively fixedly installed on the left and right sides of the surface of the transmission rod. A bevel gear set is connected to the rear end of the rotating rod, and the bevel gear set is installed on the surface of the hollow tube.

[0021] By adopting the above technical solution, it is convenient to rotate the hollow tube and the housing 180° by means of the meshing of the driven bevel gear with the first driving bevel gear and the second driving bevel gear after the test is completed, so that the test probe can be tested when the slide plate moves back and forth, thereby improving the overall test efficiency.

[0022] A method for detecting surface defects in wind turbine blades includes a clamping mechanism, a rotating mechanism, a cleaning mechanism, a detection probe, and a gas delivery mechanism. The detection probe is located behind the cleaning mechanism in the direction of travel. The method comprises the following steps: Step 1: Clamp and fix the wind turbine blades using a clamping mechanism, and then rotate the clamped wind turbine blades from 0 to 360° using a rotating mechanism; Step 2: While keeping the wind turbine blades rotating at a constant speed, the cleaning mechanism moves at a constant speed from one side to the other to spray and clean the wind turbine blades first, and then blow them with air to remove water, so as to avoid water droplets sticking to the wall and interfering with the detection. Step 3: During the cleaning process of the wind turbine blades, the cleaned areas of the wind turbine blades are inspected for defects using a detection probe. At the same time, the rotation of the wind turbine blades is stopped. During the inspection process, the wind turbine blades can be rotated and adjusted at an appropriate angle before inspection. The inspection data is compared with the standard data of defect-free wind turbine blades to analyze whether there are any defects. Step 4: When a defect is detected, hot air is sprayed onto the defective area through the gas delivery mechanism to dry the area, and then the defective area is marked.

[0023] Compared with the prior art, the beneficial effects of the present invention are: The clamping mechanism can be used to fix the wind turbine blades externally or clamp them, which is suitable for wind turbine blades of different sizes and structures, thus improving the versatility of the device; the rotating mechanism drives the wind turbine blades to rotate, and together with the movement of the detection probe, it can realize the detection of the wind turbine blades in the circumferential direction without blind spots, ensuring the comprehensiveness of the detection. Before testing, the cleaning organization cleans and blows air onto the surface of the wind turbine blades to remove surface stains and debris. At the same time, it blows off the water on the surface of the wind turbine blades to prevent impurities or water droplets from interfering with the recognition accuracy of the detection probe. This provides a clean testing environment for the detection probe and improves the detection accuracy. When a defect is detected, the gas delivery mechanism can quickly dry the defect location to be marked, and the marking mechanism can mark the defect location in real time, realizing the linkage between detection and marking, avoiding the waste of time in finding the defect location later, and reducing the difficulty of subsequent defect handling. The ink filling mechanism can automatically replenish the ink to the labeling mechanism without disassembling the labeling mechanism, reducing equipment downtime, ensuring continuous testing process, and improving testing efficiency.

[0024] The positioning and guiding mechanism restricts the rotation of the hollow tube and the chassis during the testing process to ensure stable testing. After the testing is completed, the flipping mechanism can rotate the hollow tube and related components such as the testing probe by 180°, so that the testing probe can test the wind turbine blades as the slide plate moves back and forth, thus improving testing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the left side view of the present invention; Figure 2 This is a schematic diagram of the right-side view of the present invention; Figure 3 This is a schematic diagram of the cross-sectional connection structure between the hollow tube and the electric telescopic rod in this invention; Figure 4 This is a schematic diagram of the cross-sectional connection structure between the upright plate and the shell of the present invention; Figure 5 This is a schematic diagram of the connection structure between the cylinder and the movable plate of the present invention; Figure 6 This is a schematic diagram of the connection structure between the connecting rod, the movable plate, and the moving seat of the present invention; Figure 7 This is a schematic diagram of the connection structure between the electric telescopic rod and the chassis of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the chassis of the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the cylindrical body of the present invention; Figure 10 This is a schematic diagram of the cross-sectional connection structure when the discharge tube of the present invention is connected to the labeling pen holder; Figure 11 This is a schematic diagram of the connection structure between the bevel gear set, the hollow tube, and the rotating rod of the present invention; Figure 12 This is a schematic diagram of the structure when the driven bevel gear and the first driving bevel gear of the present invention are connected.

[0026] In the diagram: 1. Base; 2. Detection probe; 3. Vertical plate; 4. Slide plate; 5. Fixed plate; 6. Hollow tube; 7. Electric telescopic rod; 8. Chassis; 9. Lifting frame; 10. Housing; 11. Hydraulic cylinder; 12. Cylinder; 13. Moving seat; 14. Movable plate; 15. Connecting rod; 16. Clamping seat; 17. First motor; 18. Rotating shaft; 19. Chain drive device; 20. Mounting frame; 21. Water spray pipe; 22. Air spray pipe; 23. Second motor; 24. Threaded rod; 25. Cylinder; 26. Slide rod; 27. Piston; 28. Electric heating plate; 29. 30. Air inlet pipe; 31. Air outlet pipe; 32. Nozzle; 33. Marking pen holder; 34. Ink guide pen refill; 35. Marking pen tip; 36. Material cylinder; 37. Feed pipe; 38. Discharge pipe; 39. Fixing sleeve; 40. Movable rod; 41. Spring; 42. Sealing plug; 43. Top rod; 44. Mounting frame; 45. Positioning strip; 46. Positioning block; 47. Fixing block; 48. Rotating rod; 49. Driven bevel gear; 50. Transmission rod; 51. First driving bevel gear; 52. Second driving bevel gear; 53. Bevel gear set; 54. Distance sensor; 55. Fixing bracket. Detailed Implementation

[0027] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 - Figure 12 The technical solution of this invention is as follows: a wind turbine blade appearance defect detection device and its detection method, comprising a base 1 and a detection probe 2, the detection probe 2 being an ultrasonic probe head, a controller for controlling various electrical devices being provided on the base 1, a vertical plate 3 being fixedly installed on the left end of the top surface of the base 1, a sliding plate 4 being slidably connected to the front end of the top surface of the base 1 via an electric sliding rail, a fixing plate 5 being fixedly installed on the top surface of the sliding plate 4, a hollow tube 6 being provided through the fixing plate 5 via a bearing, an electric telescopic rod 7 being fixedly installed on the top surface of the hollow tube 6, and the output shaft of the electric telescopic rod 7 passing through the hollow tube 6. The output shaft end of the telescopic rod 7 is fixedly mounted with a housing 8, and the detection probe 2 is fixedly mounted on the bottom surface of the housing 8. A distance sensor 53 is mounted on the bottom surface of the housing 8. A clamping mechanism for fixing the wind turbine blades is provided on the upright plate 3. The clamping mechanism is connected to the rotating mechanism. A cleaning mechanism is provided on the left side of the housing 8. An air supply mechanism is provided inside the housing 8. A marking mechanism for marking defect points is provided on the air supply mechanism. A liquid filling mechanism is provided on the top of the marking mechanism. A positioning guide mechanism and a flipping mechanism for reciprocating rotation of the hollow tube 6 are provided on the hollow tube 6.

[0029] The clamping mechanism includes a housing 10 fixedly installed on the left side of the upright plate 3. A hydraulic cylinder 11 is fixedly installed on the left side of the housing 10. The output shaft of the hydraulic cylinder 11 movably passes through the upright plate 3. A cylinder 12 is installed on the upright plate 3 through a bearing. The right end of the cylinder 12 is open. The axis of the hydraulic cylinder 11 is collinear with the axis of the cylinder 12. The output shaft of the hydraulic cylinder 11 passes through a circular hole opened in the center of the left side wall of the cylinder 12. A movable seat 13 is rotatably installed at the output shaft end of the hydraulic cylinder 11. Multiple movable plates 14 are slidably connected to the inner left side of the cylinder 12 along its radial direction. The inner side of the movable plate 14 is rotatably connected to one end of the connecting rod 15, and the other end of the connecting rod 15 is rotatably connected to the movable seat 13. A clamping seat 16 is fixedly installed at the right end of the movable plate 14.

[0030] The rotating mechanism includes a first motor 17 fixedly installed on the left side of the housing 10, and the output shaft of the first motor 17 passes through the left side wall of the housing 10 through a bearing. The shaft end of the first motor 17 is keyed to a rotating shaft 18, and the rotating shaft 18 is connected to the cylinder 12 through a chain drive device 19.

[0031] The cleaning mechanism includes a mounting bracket 20 fixedly installed on the lower left side of the chassis 8. A water spray pipe 21 and an air spray pipe 22 are installed sequentially from left to right on the front inner wall of the mounting bracket 20. Both the water spray pipe 21 and the air spray pipe 22 penetrate the rear side wall of the mounting bracket 20. The rear end of the water spray pipe 21 is connected to an external water supply device through a water supply hose, and multiple high-pressure water nozzles are installed on the water spray pipe 21 at equal intervals. The rear end of the air spray pipe 22 is connected to an external air supply device through an air supply hose, and multiple high-pressure air nozzles are installed on the air spray pipe 22 at equal intervals. The high-pressure water nozzles on the water spray pipe 21 and the high-pressure air nozzles on the air spray pipe 22 are inclined at a 30° angle to the horizontal plane, and the inclination direction is the travel direction of the water spray pipe 21 and the air spray pipe 22.

[0032] The gas delivery mechanism includes a second motor 23 fixedly installed on the bottom surface of the casing 8. A threaded rod 24 is keyed to the shaft end of the second motor 23. The top end of the threaded rod 24 is connected to the inner top surface of the casing 8 via a bearing. The threaded rod 24 passes through the lifting frame 9 and is threadedly connected to the lifting frame 9. The left and right end faces of the lifting frame 9 are longitudinally slidably connected to the left and right inner walls of the casing 8, respectively. A cylinder 25 is fixedly installed on the inner top surface of the casing 8. A through hole is provided at the upper end of the side wall of the cylinder 25 to balance the internal and external gas pressures of the cylinder 25, preventing negative or overpressure when the piston 27 moves. A sliding rod is longitudinally slidably connected to the bottom of the cylinder 25. 26, and the bottom end of the slide rod 26 is fixedly connected to the top surface of the lifting frame 9. A piston 27 is fixedly installed on the top surface of the slide rod 26. The diameter of the piston 27 matches the inner diameter of the cylinder 25. An electric heating plate 28 is installed on the inner bottom surface of the cylinder 25. An air inlet pipe 29 is fixedly connected to the bottom left end of the cylinder 25. The air inlet pipe 29 passes through the left side wall of the housing 8. A one-way air inlet valve is provided on the air inlet pipe 29. An air outlet pipe 30 is fixedly connected to the bottom right end of the cylinder 25. The air outlet pipe 30 passes through the bottom of the housing 8. A one-way air outlet valve is provided on the air outlet pipe 30. A nozzle 31 is fixedly connected to the bottom end of the air outlet pipe 30.

[0033] The marking mechanism includes a marking pen holder 32 that is fixedly inserted through the lifting frame 9. The marking pen holder 32 is provided with an ink guide pen core 33 inside, and a marking pen tip 34 is fixedly inserted through the bottom of the marking pen holder 32. The top of the marking pen tip 34 extends into the interior of the ink guide pen core 33.

[0034] The liquid addition mechanism includes a material cylinder 35 fixedly installed on the top surface of the inner casing 8. A feed pipe 36 with a valve is fixedly installed through the upper right side wall of the material cylinder 35, and the feed pipe 36 is fixedly installed through the right side wall of the casing 8. A discharge pipe 37 is fixedly installed through the bottom of the material cylinder 35, and the discharge pipe 37 is movably connected to the marking pen holder 32. A fixing sleeve 38 is fixedly installed on the inner top surface of the material cylinder 35, and a movable rod 39 is slidably installed through the bottom of the fixing sleeve 38. The movable rod 39 is T-shaped. The top surface of the movable rod 39 is fixedly connected to the bottom end of the spring 40, and the top end of the spring 40 is fixedly connected to the inner top surface of the fixing sleeve 38. The movable rod 39 extends into the interior of the discharge pipe 37, and a sealing plug 41 is fixedly installed at the bottom end of the movable rod 39. The diameter of the sealing plug 41 matches the inner diameter of the discharge pipe 37. A push rod 42 is provided below the sealing plug 41, and the push rod 42 is fixedly installed on the inner wall of the marking pen holder 32.

[0035] The positioning and guiding mechanism includes a mounting frame 43 fixedly installed on the upper right side of the upright plate 3, and the mounting frame 43 is located above the fixed plate 5. The mounting frame 43 is sleeved on the outside of the hollow tube 6. A fixing bracket 54 is fixedly installed on the right end face of the mounting frame 43. The fixing bracket 54 is fixedly installed on the top surface of the base 1. Positioning strips 44 are fixedly installed on the front and rear inner walls of the mounting frame 43. A positioning block 45 is movably arranged between the two positioning strips 44. The positioning block 45 is a regular square prism, and the length of the bottom side of the positioning block 45 is equal to the distance between the two positioning strips 44.

[0036] The flipping mechanism includes a fixed block 46 fixedly installed on the bottom surface of the fixed plate 5, and a rotating rod 47 is provided through the fixed block 46 via a bearing. A driven bevel gear 48 is coaxially fixedly installed at the front end of the rotating rod 47, and a transmission rod 49 is provided on the front side of the driven bevel gear 48. The transmission rod 49 passes through the vertical plate 3 via a bearing, and the left end of the transmission rod 49 is coaxially fixedly connected to the right end of the rotating shaft 18. The right end of the transmission rod 49 is connected to the left side of the fixed frame 54 via a bearing. A first driving bevel gear 50 and a second driving bevel gear 51 that mesh with the driven bevel gear 48 are fixedly installed on the left and right sides of the surface of the transmission rod 49, respectively. A bevel gear set 52 is connected to the rear end of the rotating rod 47, and the bevel gear set 52 is installed on the surface of the hollow tube 6.

[0037] Working principle: Move one end of the wind turbine blade toward the cylinder 12 so that the wind turbine blade is located outside or inside the clamping seat 16. Start the hydraulic cylinder 11, and drive the movable plate 14 to slide radially through the moving seat 13 and the connecting rod 15, so as to drive the clamping seat 16 to expand or contract, thereby fixing or clamping the wind turbine blade. By starting the first motor 17, the rotating shaft 18 is rotated, which drives the cylinder 12 to rotate through the chain transmission device 19, thereby driving the wind turbine blades to rotate. At the same time, the slide plate 4 is moved through the electric slide rail, which drives the housing 8 and the detection probe 2 to move synchronously. Activate the external water supply equipment and external air supply equipment so that the water spray pipe 21 sprays water to clean the rotating wind turbine blades as the box 8 moves. At the same time, the air jet pipe 22 blows air onto the rotating wind turbine blades as the box 8 moves, blowing away debris and water droplets on the surface of the wind turbine blades to prevent them from sticking to the wall. The height of the housing 8 is adjusted by the electric telescopic rod 7, and the height of the detection probe 2 is adjusted in real time by the distance sensor 53, so that it is kept at a suitable height position with the area to be detected of the wind turbine blade during rotation for comprehensive scanning and detection. When a defect is detected, the second motor 23 is started to drive the threaded rod 24 to rotate, which in turn drives the lifting frame 9 to descend. The lifting frame 9 drives the piston 27 to move downward synchronously through the slide rod 26, so that the hot air heated by the electric heating plate 28 in the cylinder 25 is discharged through the air outlet 30 and sprayed through the nozzle 31 onto the position to be marked at the defect, ensuring that the position to be marked is dry. When the lifting frame 9 moves downward, it drives the marking pen holder 32 downward in sync, so that the marking pen tip 34 touches the already dried position to be marked, thus marking the position of the defect. After the marking is completed, the second motor 23 drives the threaded rod 24 to rotate in the opposite direction, the lifting frame 9 moves upward, the slide rod 26 drives the piston 27 to move upward, and draws the external gas into the cylinder 25 through the air inlet pipe 29. The gas is heated by the electric heating plate 28 and stored in the cylinder 25 for later use. When ink needs to be added to the ink cartridge 33, the continuous rotation of the threaded rod 24 causes the lifting frame 9 to continuously rise, so that the marking pen cylinder 32 is sleeved on the outside of the discharge pipe 37. The top rod 42, which rises simultaneously with the marking pen cylinder 32, will push up the sealing plug 41 and the movable rod 39 and compress the spring 40. At this time, the ink in the cartridge 35 will flow out through the discharge pipe 37 to add ink to the ink cartridge 33. After the ink is added, the marking pen cylinder 32 and the top rod 42 move downward to reset. The release of the spring 40 causes the movable rod 39 and the sealing plug 41 to move downward to reset, blocking the ink from flowing out. During the detection process of the probe 2, the hollow tube 6 and the housing 8 are prevented from rotating by the cooperation of the positioning strip 44 and the positioning block 45. After the detection is completed, the positioning block 45 will move out from the positioning strip 44 and be placed on the left or right side of the positioning strip 44. At the same time, the driven bevel gear 48 will mesh with the first driving bevel gear 50 on the left or the second driving bevel gear 51 on the right. At this time, when the first motor 17 drives the rotating shaft 18 to rotate and drive the transmission rod 49 to rotate, the hollow tube 6 and the housing 8 will rotate 180° by the meshing of the driven bevel gear 48 with the first driving bevel gear 50 or the second driving bevel gear 51, so that the housing 8 and related components can be flipped. The wind turbine blades that are re-clamped and fixed can be detected during the return process, so as to ensure that the slide plate 4 can be used to detect the wind turbine blades during the reciprocating movement of the probe 2, which can improve the detection efficiency of the wind turbine blades.

[0038] A method for detecting surface defects in wind turbine blades includes a clamping mechanism, a rotating mechanism, a cleaning mechanism, a detection probe, and a gas delivery mechanism. The detection probe is located behind the cleaning mechanism in the direction of travel. The method comprises the following steps: Step 1: Clamp and fix the wind turbine blades using a clamping mechanism, and then rotate the clamped wind turbine blades from 0 to 360° using a rotating mechanism; Step 2: While keeping the wind turbine blades rotating at a constant speed, the cleaning mechanism moves at a constant speed from one side to the other to spray and clean the wind turbine blades first, and then blow them with air to remove water, so as to avoid water droplets sticking to the wall and interfering with the detection. Step 3: During the cleaning process of the wind turbine blades, the cleaned areas of the wind turbine blades are inspected for defects using a detection probe. At the same time, the rotation of the wind turbine blades is stopped. During the inspection process, the wind turbine blades can be rotated and adjusted at an appropriate angle before inspection. The inspection data is compared with the standard data of defect-free wind turbine blades to analyze whether there are any defects. Step 4: When a defect is detected, hot air is sprayed onto the defective area through the gas delivery mechanism to dry the area, and then the defective area is marked.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting surface defects in wind turbine blades, comprising a base (1) and a detection probe (2), characterized in that: A vertical plate (3) is fixedly installed on the left side of the top surface of the base (1). A sliding plate (4) is slidably connected to the front of the top surface of the base (1) via an electric slide rail. A fixed plate (5) is fixedly installed on the top surface of the sliding plate (4). A hollow tube (6) is installed through the fixed plate (5) via a bearing. An electric telescopic rod (7) is fixedly installed on the top surface of the hollow tube (6). The output shaft of the electric telescopic rod (7) passes through the hollow tube (6). A housing (8) is fixedly installed at the end of the output shaft of the electric telescopic rod (7). The detection probe (2) is fixedly installed on the bottom surface of the housing (8). A distance sensor (53) is installed on the bottom surface of the housing (8). The vertical plate (3) is provided with a clamping mechanism for fixing wind turbine blades. The clamping mechanism is connected to the rotating mechanism. The left side of the chassis (8) is provided with a cleaning mechanism. The inside of the chassis (8) is provided with a gas supply mechanism. The gas supply mechanism is provided with a marking mechanism for marking defect points. The top of the marking mechanism is provided with a liquid filling mechanism. The hollow tube (6) is provided with a positioning guide mechanism and a flipping mechanism for the reciprocating rotation of the hollow tube (6).

2. The wind turbine blade appearance defect detection device according to claim 1, wherein, The clamping mechanism includes a housing (10) fixedly installed on the left side of the upright plate (3). A hydraulic cylinder (11) is fixedly installed on the left side of the housing (10). The output shaft of the hydraulic cylinder (11) movably passes through the upright plate (3). A cylinder (12) is provided on the upright plate (3) through a bearing. The axis of the hydraulic cylinder (11) is collinear with the axis of the cylinder (12). The output shaft of the hydraulic cylinder (11) passes through a circular hole opened in the center of the left side wall of the cylinder (12). A movable seat (13) is rotatably installed at the output shaft end of the hydraulic cylinder (11). Multiple movable plates (14) are slidably connected to the inner left side wall of the cylinder (12) along its radial direction. The inner side of the movable plate (14) is rotatably connected to one end of the connecting rod (15). The other end of the connecting rod (15) is rotatably connected to the movable seat (13). A clamping seat (16) is fixedly installed at the right end of the movable plate (14).

3. The wind turbine blade appearance defect detection device according to claim 2, wherein, The rotating mechanism includes a first motor (17) fixedly installed on the left side of the housing (10), and the output shaft of the first motor (17) passes through the left side wall of the housing (10) through a bearing. The shaft end of the first motor (17) is keyed to a rotating shaft (18), and the rotating shaft (18) is connected to the cylinder (12) through a chain drive device (19).

4. The wind turbine blade appearance defect detection device according to claim 1, wherein, The cleaning mechanism includes a mounting bracket (20) fixedly installed on the lower left side of the chassis (8). A water spray pipe (21) and an air jet pipe (22) are installed on the inner front wall of the mounting bracket (20) from left to right. Both the water spray pipe (21) and the air jet pipe (22) penetrate the rear side wall of the mounting bracket (20). The rear end of the water spray pipe (21) is connected to an external water supply device through a water supply hose, and multiple high-pressure water nozzles are installed on the water spray pipe (21) at equal intervals. The rear end of the air jet pipe (22) is connected to an external air supply device through an air supply hose, and multiple high-pressure air nozzles are installed on the air jet pipe (22) at equal intervals.

5. The wind turbine blade appearance defect detection device according to claim 1, wherein, The gas feeding mechanism comprises a second motor (23) fixedly installed on the inner bottom surface of the case (8), the shaft end of the second motor (23) is key-connected with a threaded rod (24), the top end of the threaded rod (24) is connected with the inner top surface of the case (8) through a bearing, the threaded rod (24) penetrates through the lifting frame (9) and is threadedly connected with the lifting frame (9), the left and right end surfaces of the lifting frame (9) are longitudinally and slidably connected with the left and right inner walls of the case (8), the inner top surface of the case (8) is fixedly installed with a cylinder (25), the bottom of the cylinder (25) is longitudinally slidably connected with a sliding rod (26), the bottom end of the sliding rod (26) is fixedly connected with the top surface of the lifting frame (9), the top surface of the sliding rod (26) is fixedly installed with a piston (27), the diameter of the piston (27) is consistent with the inner diameter of the cylinder (25), the inner bottom surface of the cylinder (25) is installed with an electric heating plate (28), the bottom left end of the cylinder (25) is fixedly penetrated with an air inlet pipe (29), the air inlet pipe (29) penetrates through the left side wall of the case (8), a one-way air inlet valve is arranged on the air inlet pipe (29), the bottom right end of the cylinder (25) is fixedly penetrated with an air outlet pipe (30), the air outlet pipe (30) is fixedly penetrated through the bottom of the case (8), a one-way air outlet valve is arranged on the air outlet pipe (30), and the bottom end of the air outlet pipe (30) is fixedly and communicatively installed with a spray head (31).

6. The wind turbine blade appearance defect detection device according to claim 5, wherein, The marking mechanism comprises a marking pen barrel (32) fixedly penetrating through the lifting frame (9), the inside of the marking pen barrel (32) is provided with a lead core (33), and the bottom of the marking pen barrel (32) is fixedly and penetratively provided with a marking pen tip (34), and the top of the marking pen tip (34) extends into the inside of the lead core (33).

7. The apparatus for detecting appearance defects of a wind power blade according to claim 6, wherein, The liquid feeding mechanism comprises a material cylinder (35) fixedly installed on the inner top surface of the case (8), a valve-equipped feeding pipe (36) is fixedly and penetratively provided on the right side wall of the material cylinder (35) and penetrates through the right side wall of the case (8), the bottom of the material cylinder (35) is fixedly and penetratively provided with a discharging pipe (37), the discharging pipe (37) is movably sleeved with the marking pen barrel (32), a fixed sleeve (38) is fixedly installed on the inner top surface of the material cylinder (35), a movable rod (39) is slidably and penetratively provided at the bottom of the fixed sleeve (38), the top surface of the movable rod (39) is fixedly connected with the bottom end of a spring (40), the top end of the spring (40) is fixedly connected with the inner top surface of the fixed sleeve (38), the movable rod (39) extends into the inside of the discharging pipe (37), a sealing plug (41) is fixedly installed at the bottom end of the movable rod (39), the diameter of the sealing plug (41) is consistent with the inner diameter of the discharging pipe (37), and a jacking rod (42) is arranged below the sealing plug (41) and is fixedly installed on the inner wall of the marking pen barrel (32).

8. The wind turbine blade appearance defect detection device according to claim 1, wherein, The positioning guide mechanism comprises a mounting frame (43) fixedly mounted on the right side surface of the vertical plate (3) at the upper end, the mounting frame (43) is located above the fixed plate (5), and the mounting frame (43) is sleeved outside the hollow pipe (6), the front and rear inner walls of the mounting frame (43) are fixedly provided with positioning strips (44), and the positioning blocks (45) are movably arranged between the two positioning strips (44), the positioning block (45) is a regular quadrangular prism, and the bottom edge length of the positioning block (45) is equal to the spacing between the two positioning strips (44).

9. The wind turbine blade appearance defect detection device according to claim 3, wherein, The overturning mechanism comprises a fixed block (46) fixedly mounted on the bottom surface of the fixed plate (5), a rotating rod (47) is arranged on the fixed block (46) in a penetrating manner through a bearing, the front end of the rotating rod (47) is coaxially fixedly provided with a driven bevel gear (48), the front side of the driven bevel gear (48) is provided with a transmission rod (49), the transmission rod (49) penetrates the vertical plate (3) through a bearing, and the left end of the transmission rod (49) is coaxially fixedly connected with the right end of the rotating shaft (18), the surface of the transmission rod (49) is fixedly provided with a first driving bevel gear (50) and a second driving bevel gear (51) on the left side and the right side respectively, the rear end of the rotating rod (47) is connected with a bevel gear set (52), and the bevel gear set (52) is mounted on the surface of the hollow pipe (6).

10. A wind turbine blade appearance defect detection method, comprising a clamping mechanism, a rotating mechanism, a cleaning mechanism, a detection probe and a gas conveying mechanism for the detection method, the detection probe is located at the rear side of the cleaning mechanism in the direction of travel, characterized in that, The method comprises the following steps: Step one: the wind power blade is clamped and fixed by the clamping mechanism, and then the clamped and fixed wind power blade is rotated by 0-360° through the rotating mechanism; Step two: the cleaning mechanism moves uniformly from one side to the other side to spray and clean the wind power blade, and then blows and dries the water, so as to avoid the interference of water droplets on the wall on detection; Step three: in the cleaning process, the detection probe detects the defects of the cleaned area of the wind power blade, and the rotation of the wind power blade is stopped, the wind power blade is appropriately rotated and adjusted in angle for detection, the detection data is compared with the standard data of the non-defective wind power blade, and whether there is a defect is analyzed; Step four: when the detection has a defect, hot gas is sprayed to the defect area through the gas conveying mechanism to dry the area, and then the defect area is marked.

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