A device for marking damage to rotor blades of wind turbines

Abstract

A device for marking damage to rotor blades of wind turbines, which is installed at the edge of the wind turbine blades, characterized by two circumferential bands (2) which are respectively located on the front and rear sides of the blades, with a scanning unit (1) in the middle of each circumferential band (2), the scanning unit (1) always exerts a pulling force on the two ends of the circumferential band (2), a walking unit (3) between the two end heads of the circumferential band (2), two rollers (4) on each walking unit (3), the two rollers (4) are respectively ink cartridges at one end of the two circumferential bands (2), the two scanning units (1) are surrounded by the circumferential band (2) and the two walking units (3) to form a ring and surround the wind turbine blades, the walking unit (3) can move the scanning unit (1) along the ring through the circumferential band (2) and also drive the scanning unit (1) to move axially along the ring;the scanning unit (1) comprises an ink cartridge (5), below the ink cartridge (5) is a trigger module (6) to which a nozzle (7) is connected, and on the side of the trigger module (6) a round tube (8) is hinged to the underside of the ink cartridges (5); when the round tube (8) presses on the trigger module (6), the trigger module (6) can expel the pigment in the ink cartridge (5) from the nozzle (7);

Description

TECHNICAL FIELD

[0001] This utility model belongs to the field of rotor blade detection of wind turbines and relates in particular to a rotor blade detection device. BACKGROUND OF THE INVENTION

[0002] Wind power as a clean renewable energy source is increasingly favored by all countries in the world, and wind power plants have been rapidly built in our country in recent years; Due to the impact of wind sand or acid rain, the rust-proof coating of wind turbine blades may fall off or be torn during use, and even the welding position of the blades under continuous strong wind will crack, so the wind turbine blades must be regularly inspected during use;The existing detection method is to record the condition of the blade surface by a drone, then transmit the image in real time to the inspector's handheld monitor, and record the damage location at any time to complete the regular blade inspection. However, the drone is too close when recording and is easy to collide with the blade under the influence of the wind, the distance is not clear, which affects the accuracy of the inspector's judgment, and the blades are generally white, the inspector is very prone to visual fatigue after long hours of work. Therefore, a device that reduces leakage under the premise of safe and sound inspection is still lacking at this stage. SUMMARY OF THE INVENTION

[0003] The purpose of this utility model is to propose a wind turbine damage marking device to solve the problem of the current lack of a device that can reduce missed detections under the premise of safety and stability in the detection of wind turbine blades.

[0004] To achieve the above-mentioned objectives, the present utility model uses the following technical solution: A marking device for damage detection is located on the periphery of the wind turbine blade. The device consists of two strapping bands, one on the front and one on the back of the blade. Each strapping band is equipped with a scanning unit in the center, which constantly exerts retraction tension on both ends of the strapping band. Between the two strapping bands are two walking units, each equipped with two rollers, which are ink cartridges at one end of the two strapping bands. The two scanning units are surrounded by strapping bands and two walking units in a ring shape. The walking unit can drive the scanning unit to move radially and axially along the shape of the strapping band; The scanning unit contains an ink cartridge, and a trigger module is located below the ink cartridges. The trigger module is connected to a nozzle, and a round tube is hinged to the bottom of the ink cartridges on one side of the trigger module. When the round tube applies pressure to the trigger module, the trigger module can spray the pigment inside the ink cartridges from the nozzle.

[0005] As a further description of the above technical solution: There are two support plates that are above the ink cartridges Ink cartridges are, and a round roller is provided between the two support plates. The round roller has a radial groove, and the center of the strapping band is in the ink cartridge groove. A spring is provided between the round roller and the support plate, and the strapping band is wound around the round roller under the action of the spring; In addition, the two ends of the strapping band can be subjected to both retraction forces and pulled outward; There is an inlet on the side wall of the ink cartridges, and a piston is installed at the inlet; Unscrew the piston to inject pigment into the ink cartridges; Among the ink cartridges are several universal wheel ink cartridges; To assist the radial or axial movement of the scanning unit towards the ring.

[0006] As a further description of the above-mentioned technical solution: The distance from the hinge point on the round pipe to the upper end of the round pipe is greater than the distance from the hinge point to the lower end of the round pipe; a torsion spring is provided between the round pipe and the square column. The torsion spring tilts one end of the square column upward to touch the trigger module, and tilts the other end downward to touch the surface of the blade.The distance from the hinge point on the round tube to the upper end of the round tube is greater than the distance from the hinge point to the lower end of the round tube; To amplify the displacement at the lower end of the round tube and transmit it to the trigger module, thereby improving the response accuracy of the trigger module; The lower end of the round tube is located on one side of a universal wheel; To avoid rotation of the round tube caused by changes in the curvature of the blade surface.

[0007] As a further description of the above technical solution: The bottom end of the ink cartridges is equipped with a hanging rope ink cartridges, which can lift the bottom end of the round tube upward; In order to avoid the situation where the torsion spring drives the round tube to constantly press the printing module after the separation of the bottom end of the round tube from the sheet surface after the detection is completed, resulting in continuous pigment spraying.

[0008] As a further description of the above technical solution: The walking unit consists of a base plate, with a vertical plate on each side of the ink cartridge base plate. The roller is located between two vertical plates, with a support plate between them. A drag motor is on the ink cartridge support plate, and the shafts of both roller and drag motor pass through the vertical plate and are strapped to the ink cartridges. The three roller are driven by strapping. There is a rectangular groove on the base, and two roller are located in the rectangular groove through bearing seats for ink cartridges. The axis of the roller is perpendicular to the axis of the roller. A walking motor is on the ink cartridge base, and the shaft of the walking motor is located between the two rollers. Both the roller and the walking motor shaft are connected to the ink cartridges with gears, and the roller is driven by the walking motor through the gears.

[0009] As a further description of the above technical solution: Each of the vertical plates is hinged on both sides with a connecting rod. Two support columns are sandwiched between two connecting rods on the same side of different vertical plates, and several rubber wheels are provided between the two support columns. The axis of the rubber wheels is perpendicular to the axis of the roller. Each connecting rod is hinged to the vertical plate with a torsion spring, which allows the rubber wheels on both sides to swing closer to the roller; Realizing the rolling of the blade surface with constantly changing curved surfaces of the roller and rubber wheels when the walking unit moves on the wind turbine blades.

[0010] To further describe the above technical solution: The trigger module includes a hollow shaft with a through hole at the bottom of the ink cartridges. The upper end of the hollow shaft extends into the ink cartridges through the through hole, and a sealing ring is provided between the hollow shaft and the ink cartridges. The upper end of the hollow shaft is provided with a support plate for pressing ink cartridges, and the bottom of the support plate is provided with an annular rubber pad for pressing ink cartridges. A round hole is opened on the side wall of the hollow shaft below the support plate, and the distance from the lowest point of the circular hole to the bottom of the support plate is less than the thickness of the rubber pad. The lower end of the hollow shaft is firmly located under the hollow shaft. The lower end of the ink cartridges is located under the support plate.The bottom end of the hollow shaft is firmly connected to the bottom of the ink cartridge. When not subjected to external force, the compression spring can firmly press the rubber pad at the bottom of the ink cartridge through the compression plate to prevent the pigment from spraying out. When the round tube pushes the hollow shaft upward through the stopper, the rubber pad separates from the bottom of the ink cartridge, and the pigment flows toward the nozzle through the round hole and sprays out.

[0011] In summary, the positive effects of the present utility model due to the adoption of the above-mentioned technical solution are: (1) This utility model uses strapping to circularly wrap two scanning units and two walking units around the sheet. During operation, the two walking units alternately pull the two scanning units to move radially and cooperate with the two walking units to move the scanning unit axially. This enables the two scanning units to complete the detection and marking work on the sheet in a manner that overlaps multiple circular paths. The working mode is stable and firm, and does not cause collision damage to the blade, with high safety. (2) This utility model uses a round tube hinged to the bottom of the scanning unit to scan and detect blade damage. When the lower end of the round tube touches the damaged area, the upper end of the round tube can push and trigger the module, causing the pigment in the ink cartridges to spray on one side of the damaged area. (3) This utility model not only tilts the hinge point between the round tube and the square column toward the lower end of the round tube, but also amplifies the displacement of the lower end of the round tube and transmits it to the hollow shaft, thereby improving the response accuracy of the triggering module. Compared with the human eye observation and detection method, this device can better detect small cracks or a small amount of coating peeling and improve the detection quality; moreover, the inclined round tube can ensure that it will not undergo hard compression with cracks, which not only avoids deformation and damage to the round tube, but also prevents further damage to the blades. (4) During use, the walking unit of this utility model alternately pulls the scanning unit on the blade through a strapping band for detection work, and the strapping band is always in a taut state under the action of the spring. Therefore, the strapping band can also clean the bird droppings or other contaminants deposited on the blade during repeated movement, avoiding the continuous corrosion of the stainless steel coating by contaminants. FIGURE LIST Fig. 1 is a schematic diagram of the utility model in use; Fig. 2 is a perspective view of the scanning unit of the present utility model; Fig. 3 is a perspective view of the walking unit of the present utility model; Fig. 4 is a front view of the scanning unit of the present utility model; Fig. 5 is a schematic diagram of the lower structure of the walking unit of the present utility model; Fig. 6 is an enlarged view of point A in Fig. 4 of the present utility model.

[0012] Key description: 1. Scanning unit; 2. Strapping band; 3. Walking unit; 4. Roller; 5. Ink cartridges; 6. Trigger module; 7. Nozzle; 8. Round tube; 9. Support plate; 10. Round roller; 11. Piston; 12. Universal wheel; 13. Square column; 14. Hanging rope; 15. Base; 16. Vertical plate; 17. Support plate; 18. Traction motor; 19. Roller; 20. Walking motor; 21. Connecting rod; 22. Rubber wheels; 23. Hollow shaft; 24. Through hole; 25. Support plate press; 26. Rubber pad; 27. Round hole; 28. Stopper; 29. ​​Compression spring. DETAILED DESCRIPTION OF THE FIGURES

[0013] Below, a clear and complete description of the technical solution in the embodiments of the present utility model is given based on the attached drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Based on the embodiments in this utility model, all other embodiments that ordinary persons skilled in the art can obtain without creative effort fall within the scope of this utility model.

[0014] As shown in the Fig. 1-6, the present utility model offers a technical solution for the marking of rotor blades of a wind turbine: A marking device for damage to wind turbine blades is located on the periphery of the blade of wind turbines. The device comprises two strapping bands 2, located on the front and back of the blade. Each strapping band 2 is equipped with a scanning unit 1 in the center, which always exerts a retraction tension on both ends of the strapping band 2. Between the two strapping bands 2 are two walking units 3, and each walking unit 3 is equipped with two rollers 4, which are ink cartridges at one end of the two strapping bands 2. The two scanning units 1 are surrounded by strapping bands 2 and two walking units in a ring shape. The walking unit 3 can move the walking unit axially along the blade.

[0015] The scanning unit 1 contains an ink cartridge 5, and a trigger module 6 is located below the ink cartridges 5. A nozzle 7 is connected to the trigger module 6, and a round tube 8 is hinged to the bottom of the ink cartridges 5 on one side of the trigger module 6. When the round tube 8 applies pressure to the trigger module 6, the trigger module 6 can spray the pigment inside the ink cartridges 5 from the nozzle 7.

[0016] There are two support plates 9 which are above the ink cartridges 5, and a round roller 10 is provided between the two support plates 9. The round roller 10 has a radial groove, and the center of the strapping band 2 is in the ink cartridge groove. A spring is provided between the round roller 10 and the support plate 9, and the strapping band 2 is wound around the round roller 10 under the action of the spring; In addition, the two ends of the strapping band 2 can be subjected to retraction forces and pulled outward; There is an inlet on the side wall of the ink cartridges 5, and a piston 11 is located at the inlet; Unscrew piston 11 to inject pigment into ink cartridges 5; There are several universal wheels 12 which are below ink cartridges 5; To assist the radial or axial movement of the scanning unit 1 to the ring.

[0017] The bottom of the ink cartridges 5 is provided with a square column 13. The round tube 8 is hinged at the lower end of the square column 13, and a torsion spring is provided between the round tube 8 and the square column 13. The torsion spring causes one end of the square column 13 to tilt upward and contact the trigger module 6, and the other end to tilt downward and contact the blade surface. The distance from the hinge point on the round tube 8 to the upper end of the round tube 8 is greater than the distance from the hinge point to the lower end of the round tube 8; in order to amplify the displacement at the lower end of the round tube 8 and transmit it to the trigger module 6, thereby improving the response accuracy of the trigger module 6; the lower end of the round tube 8 is located on one side of a universal wheel 12; in order to prevent rotation of the round tube 8 due to changes in the curvature of the blade surface.

[0018] The lower end of the ink cartridges 5 is provided with a hanging rope 14 ink cartridges, which can lift the lower end of the round tube 8 upward; In order to avoid the situation where the torsion spring drives the round tube 8 to constantly press the printing module after the separation of the lower end of the round tube 8 from the sheet surface at the end of the detection, resulting in continuous pigment spraying.

[0019] The walking unit 3 consists of a base 15, with a vertical plate 16 on each side of the base 15. The roller 4 is located between two vertical plates 16, with a support plate 17 between them. A drag motor 18 is attached to the support plate 17, and the rotating shafts of both roller 4 and the drag motor 18 pass through the vertical plate 16 and are strapped with ink cartridges. There is a rectangular groove on the base 15, and two rollers 19 are mounted in the rectangular groove through bearing seats for ink cartridges. The axis of the roller 19 is perpendicular to the axis of the roller 4. A walking motor 20 is on the base 15 ink cartridges, and the shaft of the walking motor 20 is located between the two roller 19. Gears are on the shafts of the roller 19 and the walking motor 20 ink cartridges, and the roller 19 is driven by the walking motor 20 through the gears.

[0020] Each vertical plate 16 is hinged on both sides by a connecting rod 21. Two support columns are provided between the two connecting rods 21 on the same side of different vertical plates 16, and several rubber wheels 22 are provided between the two support columns. The axis of the rubber wheels 22 is perpendicular to the axis of the roller 4. Each connecting rod 21 is hinged to the vertical plate 16 with a torsion spring, which allows the rubber wheels 22 on both sides to swing closer to the roller 19. When the walking unit 3 moves on the blade of the wind turbine, the roller 19 and the rubber wheels 22 can always roll on the blade surface with constantly changing curved surfaces.

[0021] The trigger module 6 contains a hollow shaft 23. The ink cartridges 5 have a through hole 24 at the bottom. The upper end of the hollow shaft 23 extends through the through hole 24 into the ink cartridges 5. There is a sealing ring between the hollow shaft 23 and the ink cartridges 5. The upper end of the hollow shaft 23 is connected to a support plate press 25 for ink cartridges. A circular rubber pad 26 is provided at the bottom of the support plate press 25 for ink cartridges. There is a round hole 27 on the side wall of the hollow shaft 23 below the support plate press 25. The distance from the lowest point of the round hole 27 to the lower surface of the support plate press 25 is smaller than the thickness of the rubber pad 26. The lower end of the hollow shaft 23 is located below the ink cartridges 5. The nozzle 7 is firmly connected to the lower end of the hollow shaft 23. A stopper is provided on the hollow shaft 23 below the ink cartridges 5. 28.A compression spring 29 is located between the stopper 28 and the ink cartridge 5; when not subjected to external force, the compression spring 29 can press the rubber pad 26 on the bottom of the ink cartridge 5 through the support plate press 25 and prevent the pigment from splashing out. When the round tube 8 pushes the hollow shaft 23 upward through the stopper 28, the rubber pad 26 separates from the bottom of the ink cartridge 5, and the pigment flows through the round hole 27 to the nozzle 7 and is sprayed out. Working principle:

[0022] When using this utility model, unscrew the piston 11, inject pigment into the ink cartridges 5, and make the pressure inside the ink cartridges 5 greater than atmospheric pressure; attach two scanning units 1 and two walking units 3 to the roots of the wind turbine blades, and connect the towing motor 18 and the walking motor 20 to an external power source through long wires. Then, fix the strapping band 2 on the two scanning units 1 to the two rollers 4 of one of the walking units 3 with bolts, wrap one of the scanning units 1 around the blade, and finally fix the other end of the strapping band 2 on the two scanning units 1 to the two rollers 4 of the other walking unit 3. At this time, the two scanning units 1 and the two walking units 3 have already wrapped around the blade, and under the action of the spring, the two scanning units are firmly attached to the surface of the scanning unit ink cartridges;

[0023] At the beginning, each scanning unit 1 is located in the middle of the path between two walking units 3, and the length of the four strapping bands 2 is the same. The drag motor 18 on the later installed walking unit 3 is started, and the motor drives the two rollers 4 to rotate through the strapping band, thereby pulling the two scanning unit 1 towards the driven walking unit 3. At this time, the non-driven walking unit 3 pulls out the strapping band 2 on the scanning unit 1, and the circular roller 10 on the scanning unit 1 rotates until the two scanning unit 1 move to both sides of the driven walking unit 3. The inspector is turned off at this surface and at the next point takes contact between two circular walking units 3 and the inspector takes the two rollers 4 to rotate through the strapping band.

[0024] Start the drag motor 18 on the other walking unit 3, and the two scanning unit 1 approach the other walking unit 3 until the two scanning unit 1 move to both sides of the other walking unit 3. Then turn on the drag motor 18 on the other walking unit 3. At this point, the two scanning unit 1 completes the detection of a circular area on the sheet and synchronously start the walking motor 20 on the two walking unit 3. The two scanning unit 3 drive the two scanning unit to move axially a certain distance through the strapping band 2, turn off the walking motor 20, and then drive the two scanning unit 1 to move to the other side through the drag motor 18. Repeat the operation of the entire circular run through the entire position of the super knife;

[0025] When the scanning unit 1 moves on the blade, the round tube 8 is always subjected to the force of the torsion spring. When the lower end of the round tube 8 touches the crack or coating peeling area, the end of the round tube 8 in contact with the blade swings away from the ink cartridge 5, causing the other end of the round tube 8 to push the hollow shaft 23 to move.And because the hinge position of the round tube 8 is distorted to the contact end between the round tube 8 and the blade, even if the crack can only make one end of the round tube 8 sink slightly on the blade, it can also cause a larger stroke of the hollow shaft 23 at the other end of the round tube 8, thereby improving the detection accuracy; In addition, the inclined setting of the round tube 8 and its ability to rotate around the hinge point can ensure that the round tube 8 will not undergo hard compression with cracks, which not only avoids deformation and damage of the round tube 8, but also prevents further damage to the blades.

[0026] The above is only the preferred specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Those familiar with the technical scope disclosed in the present utility model should, within the scope of protection of the present utility model, include equivalent replacements or modifications based on the technical solution and utility model concept of the present utility model.

Claims

[1] A device for marking damage to rotor blades of wind turbines, which is installed at the edge of the wind turbine blades, characterized bytwo strapping bands (2), respectively located at the front and rear sides of the blades, with a scanning unit (1) in the middle of each strapping band (2), the scanning unit (1) always exerts a retraction on the two ends of the strapping band (2), a walking unit (3) between the two end heads of the strapping band (2), on each walking unit (3) two rollers (4), the two rollers (4) are each at one end of the two strapping bands (2) ink cartridges, the two scanning unit (1) by the strapping band (2) and two walking unit (3) surrounded in a ring and wrap the wind turbine blades, the walking unit (3) can both move the scanning unit (1) along the ring through the strapping band (2) and drive the scanning unit (1) in axial movement along the ring;the scanning unit (1) comprises an ink cartridge (5), below the ink cartridge (5) is a trigger module (6) to which a nozzle (7) is connected, and on the side of the trigger module (6) a round tube (8) is hinged to the underside of the ink cartridges (5); when the round tube (8) presses on the trigger module (6), the trigger module (6) can expel the pigment in the ink cartridge (5) from the nozzle (7); [2] A device for marking damage to wind turbines according to claim 1, characterized bythat two support plates (9) above the ink cartridge (5) are ink cartridges, and a round roller (10) is provided between the two, support plate (9); the round roller (10) has a through groove in the radial direction, and the center of the strapping band (2) is in the through groove ink cartridges; a spring is provided between the round roller (10) and the support plate (9), and the strapping band (2) is wound around the round roller (10) under the action of the spring; there is an inlet on the side wall of the ink cartridges (5), and a piston (11) is provided at the inlet; under the ink cartridges, there are a plurality of universal wheel (12) ink cartridges (5). [3] A device for marking damage to wind turbines according to claim 2, characterized bythat a square column (13) is at the bottom of the ink cartridges (5), the round tube (8) is hinged at the lower end of the square column (13), and a torsion spring is provided between the round tube (8) and the square column (13); the torsion spring causes one end of the square column (13) to tilt upwards and touch the trigger module (6) and the other end to tilt downwards and touch the sheet surface, and the distance from the hinge point on the round tube (8) to the upper end of the round tube (8) is greater than the square column (13); the lower end of the round tube (8) is located on one side of a universal wheel (12). [4] A device for marking damage to wind turbines according to claim 3, which characterized by is that the lower end of the ink cartridges (5) is provided with a hanging rope (14) ink cartridges, which can lift the lower end of the round tube (8) upwards. [5] A device for marking damage to wind turbines according to claim 1, which characterized byis that the walking unit (3) has a base (15) and a vertical plate (16) on each side of the base (15) for ink cartridges; the roller (4) is located between two vertical plates (16) and a support plate (17) is between the two vertical plates (16) for ink cartridges; a drag motor (18) is on the support plate (17) for ink cartridges, and the rotating shafts of the two roller (4) and the drag motor (18) pass through the vertical plate (16) and are connected to strapping pulleys for ink cartridges; the three strapping pulleys are driven by a strapping belt; there is a rectangular groove on the base (15), and two rollers (19) are mounted in the rectangular groove through bearing seats for ink cartridges; the axis of the roller (19) is perpendicular to the axis of the roller (4); a walking motor (20) is on the base (15) of the ink cartridges and the shaft of the walking motor (20) is located between the two rollers (19);Gears are on the shafts of the roller (19) and the walking motor (20) ink cartridges, and the roller (19) are driven by the walking motor (20) through the gears.; [6] A device for marking damage to wind turbines according to claim 5, characterized by that each vertical plate (16) is hinged on both sides with a connecting rod (21) and two support columns are provided between two connecting rods (21) on the same side of different vertical plates (16) ink cartridges; a plurality of rubber wheels (22) are provided between the two support columns, and the axis of the rubber wheels (22) is perpendicular to the axis of the roller (4); each connecting rod (21) is hinged to the vertical plate (16) with a torsion spring, whereby the rubber wheels (22) on both sides can swing closer to the roller rubber wheels (22). [7] A device for marking damage to wind turbines according to claim 1, characterized bythat the trigger module (6) comprises a hollow shaft (23), a through hole (24) is opened at the bottom of the ink cartridges (5), and the upper end of the hollow shaft (23) extends into the ink cartridges (5) through the through hole (24); a sealing ring is provided between the hollow shaft (23) and the ink cartridges (5), and a support plate presses (25) is at the upper end of the hollow shaft (23) ink cartridges; at the bottom of the support plate presses (25) there is a circular rubber pad (26), ink cartridges and a support plate presses (25) is opened below the round hole (27); there is a stopper (28) above the ink cartridges, and a compression spring (29) is provided between the stopper (28) and the ink cartridges (5); When no external force is applied, the compression spring (29) can press the rubber pad (26) through the support plate presses (25) to the bottom of the ink cartridges (5);when the round tube (8) pushes the hollow shaft (23) upwards through the stopper (28), the rubber pad (26) separates from the bottom of the ink cartridges (5).;

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