A wind turbine blade cleaning device and method of use thereof

Abstract

The application discloses a wind power generation wind blade cleaning device and a use method thereof, which comprises a connecting seat and a cleaning device. The connecting seat is fixed to one end of a power generation wind blade adjacent to a generator, and the cleaning device is sleeved on the power generation wind blade and connected with the connecting seat through a cable. The cleaning device comprises a plurality of cleaning units distributed along the circumference of the power generation wind blade. Two adjacent cleaning units are connected through a tightening rope and a limiting connecting frame, so that the distance between the two adjacent cleaning units can be adjusted, the cleaning of the fan blade parts with different shapes is facilitated, and the cleaning efficiency of the fan blade is improved. In order to realize the accurate butt joint of the cleaning device and the connecting seat when the cleaning device is retracted to the connecting seat, two cable deflection pressure detection devices are arranged on the side of the connecting seat facing the cleaning device, so that the accurate butt joint can be effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind blade cleaning, in particular to a wind blade cleaning device for wind power generation and a use method thereof. BACKGROUND

[0002] The wind blade for wind power generation is an important component of the wind power generation device and an important part of wind energy utilization. Since the wind blade for wind power generation has a large volume, a large amount of dust and rainwater is easily attached thereto during use. If cleaning is not performed in time, the surface of the wind blade for wind power generation is easily corroded, and the service life of the wind blade for wind power generation is affected. Therefore, regular cleaning of the wind blade for wind power generation is very important.

[0003] The conventional wind blade cleaning method for wind power generation mainly includes manual cleaning and mechanical cleaning. The manual cleaning method needs personnel to climb the tower of the wind power generator, which has great safety hazards and low cleaning efficiency. The mechanical cleaning method needs special equipment, which has high cost and large water consumption.

[0004] Therefore, it is necessary to design a wind blade cleaning device for wind power generation, which can clean the wind blade for wind power generation efficiently, adapt to different shapes of the wind blade for wind power generation, clean the outside of the wind blade for wind power generation comprehensively, reduce labor, and reduce cleaning cost and water consumption. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a wind blade cleaning device for wind power generation and a use method thereof.

[0006] The present application is achieved by the following technical solutions:

[0007] The wind blade cleaning device for wind power generation comprises a connecting seat and a cleaning device. The connecting seat is fixed to one end of the wind blade for wind power generation adjacent to the generator. The cleaning device is sleeved on the wind blade for wind power generation and connected to the connecting seat through a cable.

[0008] The cleaning device comprises a plurality of cleaning units distributed along the circumference of the wind blade for wind power generation. Two adjacent cleaning units are connected through a tightening rope.

[0009] The side of the connecting seat facing the cleaning device is provided with a limiting seat. The side of the cleaning device facing the connecting seat is provided with a limiting column. The side of the connecting seat facing the cleaning device is uniformly provided with a plurality of water supply pipes. The number of the water supply pipes is consistent with the number of the cleaning units of the cleaning device. The water supply pipes are used to supply water to the cleaning units. The side of the connecting seat facing the cleaning device is also provided with a power supply socket. The cleaning device is provided with a control box. The end of the control box is provided with a power supply plug.

[0010] The cleaning unit includes a cleaning bracket, a cleaning roller, and a cleaning water tank. The cleaning roller is mounted on the cleaning bracket and connected to a cleaning motor. The cleaning water tank is mounted on the back of the cleaning bracket and is equipped with a spray head.

[0011] A V-shaped limiting connection frame is connected between the cleaning water tanks of two adjacent cleaning units. A V-shaped fixing frame is provided at both ends of each cleaning bracket. One end of the tightening rope is fixed to one end of the V-shaped fixing frame. A guide hole is provided inside the other end of the V-shaped fixing frame. A rope-retracting electric hoist is provided on the back of the V-shaped fixing frame. The other end of the tightening rope passes through the guide hole of the adjacent V-shaped fixing frame and is connected to the rope-retracting electric hoist on the V-shaped fixing frame.

[0012] A water inlet is provided on the side of the cleaning water tank opposite to the connector, and the water supply pipe on the connector can be connected to the water inlet on the cleaning water tank.

[0013] The first electric hoist is provided on the side of the connecting seat away from the cleaning device. The upper end of the cable is connected to the first electric hoist, and the lower end of the cable passes through the connecting seat and is fixedly connected to one of the cleaning brackets of the cleaning device.

[0014] Two cable deflection pressure detection devices are installed on the connecting seat, symmetrically arranged on both sides of the cable. Each cable deflection pressure detection device includes a pulley, a pulley mounting bracket, a pressure sensor, and a pressure sensor mounting base. The pulley is mounted on the pulley mounting bracket, the pulley mounting bracket is mounted on one end of the pressure sensor, and the other end of the pressure sensor is mounted on the pressure sensor mounting base, which is fixedly mounted on the connecting seat. The cable is clamped between the pulleys of the two cable deflection pressure detection devices. By comparing the pressure detection values ​​of the two devices, the direction of cable deflection is determined. When the pressure detection values ​​are equal, the cable is considered to be perpendicular to the connecting seat, i.e., without deflection. In this state, the cleaning device is connected to the connecting seat, such that the limiting post on the cleaning device aligns with the limiting seat on the connecting seat, the water supply pipe on the connecting seat aligns with the water inlet on the cleaning device, and the power socket on the connecting seat aligns with the power plug on the cleaning device.

[0015] In the above technical solution, the cleaning bracket is C-shaped, and the opening of the cleaning bracket is set towards the direction of the power generation blades.

[0016] In the above technical solution, a cleaning brush is provided on the outside of the cleaning roller, and the cleaning brush contacts the outside of the generator blade.

[0017] In the above technical solution, the cleaning water tank is rectangular in shape, and several spray arms are evenly arranged on both sides of the width direction of the cleaning water tank. The ends of the spray arms are set towards the direction of the generator blades, and the ends of the spray arms are equipped with spray heads to spray water onto the surface of the generator blades.

[0018] In the above technical solution, the limiting connection frame includes two connecting rods of equal length, the opposite ends of the two connecting rods are rotatably connected, and the outer ends of the connecting rods are rotatably connected to the side of the cleaning water tank; N sets of limiting connection frames are set between the cleaning water tanks of two adjacent cleaning units, where N is greater than or equal to 2.

[0019] In the above technical solution, to better ensure accurate docking between the cleaning device and the connecting seat, the limiting post and the limiting seat are designed with self-aligning function. Specifically, the limiting seat is provided with an insertion hole, which includes a tapered guide hole section and an equal-diameter docking hole section; the limiting post is provided with a plug, which includes a top equal-diameter column section and a bottom tapered section; during docking, the top equal-diameter column section of the limiting post can be accurately inserted into the equal-diameter docking hole section of the limiting seat under the guidance of the tapered guide hole section of the limiting seat. At this time, the cleaning device and the connecting seat are completely aligned. Next, the top equal-diameter column section of the limiting post is inserted in a straight line along the equal-diameter docking hole section of the limiting seat. During the insertion process, the water supply pipe on the connecting seat is connected to the water inlet interface on the cleaning device, and the power socket on the connecting seat is connected to the power plug on the cleaning device.

[0020] In the above technical solution, the control box is equipped with a controller and a power supply. The power supply is used to power each cleaning unit. The controller is connected to the cleaning unit through a line. The controller is wirelessly connected to the pressure sensor of the first electric hoist and the cable deflection pressure detection device.

[0021] The method of using the wind turbine blade cleaning device of the present invention is as follows:

[0022] Fix the connector to the end of the generator blade adjacent to the generator, and fit the cleaning device onto the outside of the generator blade.

[0023] For cleaning the generator blades that are in a downward position, during the cleaning process, the controller controls the first electric hoist to release the cable, and the cleaning device moves along the length of the generator blades under the action of gravity, so that the cleaning device can clean the generator blades.

[0024] During the cleaning process, the controller controls the spray head to spray water onto the outside of the generator blades, and the controller also controls the cleaning motor to rotate, which in turn drives the cleaning roller to clean the outside of the generator blades.

[0025] During the cleaning process, a certain torque threshold is set for the electric hoist by the controller. When the shape of the generator blades changes, the distance between two adjacent cleaning units changes, resulting in a change in the torque force on the electric hoist. When the torque force on the electric hoist exceeds the set torque threshold, the controller controls the electric hoist to release the rope until the torque force on the electric hoist equals the set torque threshold. When the torque force on the electric hoist is less than the set torque threshold, the controller controls the electric hoist to tighten the rope until the torque force on the electric hoist equals the set torque threshold, thus enabling multiple cleaning units to stably cover the generator blades.

[0026] After cleaning, the controller controls the first electric hoist to retract the cable, causing the cable to pull the cleaning device along the generator blades towards the connecting seat, bringing the cleaning device back to the connecting seat. During the retraction process, the pressure values ​​of the two cable deviation pressure detection devices are compared to determine the direction of cable deviation. Based on the direction of cable deviation, the cleaning motor is controlled to rotate forward or backward, thereby controlling the cleaning device to rotate forward or backward along the circumference of the generator blades to continuously reduce cable deviation. When the pressure values ​​of the two cable deviation pressure detection devices are equal, the controller considers the cable to be in a state perpendicular to the connecting seat. In this state, the cleaning device is docked with the connecting seat, so that the limit post on the cleaning device docks with the limit seat on the connecting seat, the water supply pipe on the connecting seat docks with the water inlet on the cleaning device, and the power socket on the connecting seat docks with the power plug on the cleaning device.

[0027] In the above technical solution, during the cleaning process of the cleaning roller sweeping the generator blades, by controlling the cleaning motors of different numbers of cleaning units to rotate forward or backward, the entire cleaning device can be controlled to rotate slowly along the circumference of the generator blades, thereby increasing the cleaning contact surface.

[0028] The advantages and beneficial effects of this invention are as follows:

[0029] The connector of this invention is fixed to the root of the wind turbine blade. The cleaning device can efficiently clean the wind turbine blade, reduce the contact between external dust and rainwater and the wind turbine blade, reduce external corrosion of the wind turbine blade, and ensure the service life of the wind turbine blade.

[0030] The two adjacent cleaning units of the present invention are connected by a tightening rope and a limiting connecting frame, so that the distance between the two adjacent cleaning units can be adjusted, which facilitates the cleaning of fan blades of different shapes and improves the cleaning efficiency of fan blades.

[0031] To ensure accurate docking of the cleaning device with the connecting seat when it retracts, this invention includes two cable deviation pressure detection devices on the side of the connecting seat facing the cleaning device. When the cable deviates, the pressure sensor of the cable deviation pressure detection device on the deviated side will increase. By comparing the pressure values ​​of the two cable deviation pressure detection devices, the direction of cable deviation can be determined. When the pressure values ​​of the two cable deviation pressure detection devices are equal, the cable is considered to be perpendicular to the connecting seat, i.e., without deviation. In this state, docking the cleaning device with the connecting seat can effectively ensure accurate docking, allowing the limiting post on the cleaning device to dock with the limiting seat of the connecting seat, the water supply pipe on the connecting seat to dock with the water inlet on the cleaning device, and the power socket on the connecting seat to dock with the power plug on the cleaning device.

[0032] In addition, in order to better ensure that the cleaning device and the connecting seat can be accurately connected, the present invention also incorporates a structural design with self-regulating positive function for the limiting post and the limiting seat. Attached Figure Description

[0033] Appendix Figure 1 This is an axonometric schematic diagram of the wind turbine blade cleaning device of the present invention.

[0034] Appendix Figure 2 This is a schematic diagram of the cleaning device in this invention from an isometric perspective.

[0035] Appendix Figure 3 This is a side view of the cleaning device in use according to the present invention.

[0036] Appendix Figure 4 This is a front view schematic diagram of the cleaning device in use according to the present invention.

[0037] Appendix Figure 5 Appendix to this invention Figure 4 A schematic diagram of the AA cross-section structure.

[0038] Appendix Figure 6 Appendix to this invention Figure 5 A magnified structural diagram of part B.

[0039] Appendix Figure 7 This is a schematic diagram showing the usage state of the cleaning unit of the present invention in the columnar part of the generator blade.

[0040] Appendix Figure 8 This is a schematic diagram showing the cleaning unit of the present invention in use at the tail end of the generator blade.

[0041] Appendix Figure 9 This is a schematic diagram of the cable skew pressure detection device of the present invention.

[0042] Appendix Figure 10This is a schematic diagram of the engagement state of the limiting post and the limiting seat in this invention.

[0043] The components include: 1. Connecting seat; 2. Generator blade; 3. Cable; 4. Tightening rope; 5. Limiting seat; 6. Limiting column; 7. Water supply pipe; 8. Power socket; 9. Control box; 10. Power plug; 11. Cleaning bracket; 12. Cleaning roller; 13. Cleaning water tank; 14. Spray arm; 15. V-shaped fixing frame; 16. Cable winding electric hoist; 17. Limiting connecting frame; 18. Rotating shaft; 19. Water inlet interface; 20. First electric hoist; 21. Cable deflection pressure detection device; 211. Pulley; 212. Pulley mounting bracket; 213. Pressure sensor; 214. Pressure sensor mounting seat; 51. Conical guide hole section; 52. Equal diameter mating hole section; 61. Top equal diameter column section; 62. Bottom conical section.

[0044] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0046] like Figure 1 and Figure 10 As shown, a wind turbine blade cleaning device includes a connecting seat 1 and a cleaning device. The connecting seat 1 is fixed to the end of the wind turbine blade 2 adjacent to the generator. The cleaning device is sleeved on the wind turbine blade 2 and connected to the connecting seat 1 by a cable 3.

[0047] The cleaning device includes multiple cleaning units distributed circumferentially along the generator blades 2, with adjacent cleaning units connected by a tensioning rope 4. In this embodiment, the number of cleaning units is six.

[0048] Two limiting seats 5 are provided on the side of the connecting seat 1 adjacent to the cleaning device. Two limiting posts 6 are provided on the side of the cleaning device facing the connecting seat 1. The limiting posts 6 are arranged opposite to the limiting seats 5 and can be inserted into the limiting seats 5. A plurality of water supply pipes 7 are evenly provided on the side of the connecting seat 1 adjacent to the cleaning device. The number of water supply pipes 7 is the same as the number of cleaning units of the cleaning device. The water supply pipes 7 are used to supply water to the cleaning units. A power socket 8 is also provided on the side of the connecting seat 1 adjacent to the cleaning device. A control box 9 is provided on the cleaning device. A power plug 10 is provided at the end of the control box 9. The power plug 10 is positioned opposite to the power socket 8 and the two can be connected.

[0049] The structure of each cleaning unit is described below. Each cleaning unit includes a cleaning bracket 11, a cleaning roller 12, and a cleaning water tank 13. The cleaning bracket 11 is C-shaped, with its opening facing the direction of the generator blade 2. The cleaning roller 12 is rotatably mounted on the cleaning bracket 11, and one end of the cleaning roller 12 is connected to a cleaning motor. The cleaning roller 12 has a cleaning brush on its outside, which contacts the outside of the generator blade 2. The cleaning water tank 13 is installed on the back of the cleaning bracket 11. The cleaning water tank 13 is preferably rectangular. Several spray arms 14 are evenly arranged on both sides of the width direction of the cleaning water tank 13. The ends of the spray arms 14 face the direction of the generator blade 2, and the ends of the spray arms 14 are equipped with spray heads to spray water onto the surface of the generator blade 2.

[0050] V-shaped fixing brackets 15 are provided at both ends of the cleaning bracket 11 along its length. The opening of the V-shaped fixing bracket 15 faces the generator blade 2. One end of the tightening rope 4 is fixedly connected to one end of the V-shaped fixing bracket 15. The other end of the V-shaped fixing bracket 15 is provided with a guide hole. A rope-retracting electric hoist 16 is provided on the back of the V-shaped fixing bracket 15. The other end of the tightening rope 4 passes through the guide hole of the adjacent V-shaped fixing bracket 15 and is connected to the rope-retracting electric hoist 16 on the V-shaped fixing bracket.

[0051] A V-shaped limiting connection frame 17 connects the cleaning water tanks 13 of two adjacent cleaning units. Each limiting connection frame 17 includes two connecting rods of equal length, whose opposite ends are rotatably connected, and whose outer ends are rotatably connected to the side of the cleaning water tank 13. Furthermore, N sets of limiting connection frames 17, where N is greater than or equal to 2, are arranged parallel to each other. A rotating shaft 18 is provided between these N sets of limiting connection frames 17, and this rotating shaft 18 is rotatably connected to the opposite ends of the connecting rods of these N sets of limiting connection frames 17. The function of the limiting connection frame is to both prevent relative movement of the two adjacent cleaning units along the circumference of the generator blades and to limit the position of the cleaning units, preventing relative displacement between the two adjacent cleaning units along the length of the generator blades.

[0052] A water inlet 19 is provided on the side of the cleaning water tank 13 opposite to the connecting seat 1, and the water supply pipe 7 on the connecting seat 1 can be connected to the water inlet 19 on the cleaning water tank 13.

[0053] A first electric hoist 20 is provided on the side of the connecting seat 1 away from the cleaning device. The upper end of the cable 3 is connected to the first electric hoist 20, and the lower end of the cable 3 passes through the connecting seat 1 and is fixedly connected to one of the cleaning brackets 11 of the cleaning device. By retracting the cable 3 through the first electric hoist 20, the cable 3 can pull the cleaning device along the generator blade 2 towards the connecting seat 1, thereby retracting the cleaning device to the connecting seat 1.

[0054] To ensure accurate docking of the cleaning device with the connecting seat 1 when it is retracted, two cable deflection pressure detection devices 21 are installed on the side of the connecting seat 1 facing the cleaning device. (See Appendix) Figure 9 Two cable deflection pressure detection devices 21 are symmetrically arranged on both sides of the cable 3. Each cable deflection pressure detection device 21 includes a pulley 211, a pulley mounting bracket 212, a pressure sensor 213, and a pressure sensor mounting base 214. The pulley 211 is mounted on the pulley mounting bracket 212, the pulley mounting bracket 212 is mounted on one end of the pressure sensor 213, and the other end of the pressure sensor 213 is mounted on the pressure sensor mounting base 214. The pressure sensor mounting base 214 is fixedly mounted on the connecting seat 1. The cable 3 is clamped between the pulleys 211 of the two cable deflection pressure detection devices 21. When the cable 3 deflects, the cable deflection pressure detection on the deflected side is... The pressure detection value of the pressure sensor of device 21 will increase. By comparing the pressure detection values ​​of the two cable deflection pressure detection devices 21, the deflection direction of cable 3 can be determined. When the pressure detection values ​​of the two cable deflection pressure detection devices 21 are equal, it can be considered that cable 3 is in a state perpendicular to the connecting seat 1, that is, in a state without deflection. In this state, docking the cleaning device with the connecting seat 1 can effectively ensure accurate docking, so that the limiting post 6 on the cleaning device docks with the limiting seat 5 on the connecting seat 1, the water supply pipe 7 on the connecting seat 1 docks with the water inlet 19 on the cleaning device, and the power socket 8 on the connecting seat 1 docks with the power plug 10 on the cleaning device.

[0055] Furthermore, to better ensure accurate docking between the cleaning device and the connecting seat 1, the limiting post 6 and the limiting seat 5 are designed with self-regulating positive functions. For details, please refer to the appendix. Figure 10The limiting seat 5 is provided with an insertion hole, which includes a tapered guide hole section 51 and an equal diameter docking hole section 52; the limiting post 6 is provided with a plug, which includes a top equal diameter post section 61 and a bottom tapered section 62; during docking, even if there is a slight deviation between the cleaning device and the connecting seat 1 (the detection value of the cable deflection pressure detection device 21 may have a certain deviation, so the cable 3 may be in a slightly deflected state during docking, that is, there is a slight deviation between the cleaning device and the connecting seat 1), the top equal diameter post section 61 of the limiting post 6 can be accurately inserted into the equal diameter docking hole section 52 of the limiting seat 5 under the guidance of the tapered guide hole section 51 of the limiting seat 5. At this time, the cleaning device and the connecting seat 1 are completely aligned. Next, the top equal diameter post section 61 of the limiting post 6 is inserted in a straight line along the equal diameter docking hole section 52 of the limiting seat 5. During the insertion process, the water supply pipe 7 on the connecting seat 1 is docked with the water inlet interface 19 on the cleaning device, and the power socket 8 on the connecting seat 1 is docked with the power plug 10 on the cleaning device.

[0056] The control box 9 is equipped with a controller and a power supply. The power supply is used to power each cleaning unit. The controller is connected to the cleaning unit via a line. The controller is wirelessly connected to the pressure sensor of the first electric hoist 20 and the cable deflection pressure detection device 21.

[0057] The method of using the wind turbine blade cleaning device of the present invention is as follows:

[0058] Fix the connecting seat 1 to the end of the generator blade 2 adjacent to the generator, and fit the cleaning device onto the outside of the generator blade 2.

[0059] The cleaning work should be carried out in light wind conditions. The wind power generation device should be controlled to stop the operation of the wind turbine blade 2 and lock its position. For the wind turbine blade 2 which is in a downward position, the controller controls the first electric hoist 20 to release the cable 3 during the cleaning work. The cleaning device moves along the length of the wind turbine blade 2 under the action of gravity, so that the cleaning device can clean the wind turbine blade 2.

[0060] During the cleaning process, the controller controls the spray head to spray water onto the outside of the generator blade 2, and also controls the cleaning motor to operate. The cleaning motor drives the cleaning roller 12 to rotate, and the cleaning roller 12 cleans the outside of the generator blade 2. During the cleaning process, by controlling 3 of the 6 cleaning units to rotate forward and the other 3 to rotate in reverse, the cleaning device as a whole can prevent rotation between itself and the generator blade 2. Alternatively, by controlling 4 of the 6 cleaning units to rotate forward and the other 2 to rotate in reverse, the cleaning device as a whole can slowly rotate around the generator blade 2. Then, by controlling 4 of the 6 cleaning units to rotate in reverse and the other 2 to rotate forward, the cleaning device can be returned to its original position as much as possible to facilitate the subsequent retraction of the cleaning device.

[0061] Furthermore, during the cleaning process, a certain torque threshold is set for the electric hoist 16 via the controller. When the shape of the generator blade 2 changes, multiple cleaning units are distributed on different sides of the generator blade 2, and the distance between two adjacent cleaning units changes, resulting in a change in the torque force on the electric hoist 16. When the torque force on the electric hoist 16 is greater than the set torque threshold, the controller controls the electric hoist 16 to release the rope 4 until the torque force on the electric hoist 16 equals the set torque threshold. When the torque force on the electric hoist 16 is less than the set torque threshold, the controller controls the electric hoist 16 to tighten the rope 4, so that the torque force on the electric hoist equals the set torque threshold, thereby enabling multiple cleaning units to stably cover the generator blade 2.

[0062] After cleaning, the controller controls the first electric hoist 20 to retract the cable 3, causing the cable 3 to pull the cleaning device along the generator blade 2 towards the connecting seat 1, thus retracting the cleaning device to the connecting seat 1. During the retraction of the cleaning device, the pressure detection values ​​of the two cable deviation pressure detection devices 21 are compared to determine the direction of cable deviation 3. Based on the direction of cable deviation, the cleaning device is controlled to rotate clockwise or counterclockwise around the generator blade 2 (as described above, this is achieved by controlling the cleaning motor to rotate clockwise or counterclockwise, which will not be elaborated here), thereby continuously reducing the deviation of the cable 3. When the two cables deviate... When the pressure detection values ​​of the inclined pressure detection device 21 are equal, the controller considers that the cable 3 is in a state perpendicular to the connecting seat 1, that is, in a state without tilt. In this state, the cleaning device is docked with the connecting seat 1, so that the limiting post 6 on the cleaning device docks with the limiting seat 5 on the connecting seat 1 (that is, the limiting post 6 is inserted into the limiting seat 5). After docking, the water supply pipe 7 on the connecting seat 1 docks with the water inlet interface 19 on the cleaning device, thereby filling the cleaning water tank 13 with water. At the same time, the power socket 8 on the connecting seat 1 docks with the power plug 10 on the cleaning device, thereby charging the power supply inside the control box 9.

[0063] Furthermore, after the cleaning of the current generator blade 2 is completed, the wind power generation device unlocks the generator blade 2. When the generator blade 2, which has not yet been cleaned, is rotated to the downward position, the position of the generator blade 2 is locked again, and then the generator blade 2 is cleaned in accordance with the above method.

[0064] The present invention has been described above by way of example. It should be noted that any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort without departing from the core of the present invention fall within the protection scope of the present invention.

Claims

1. A wind turbine blade cleaning device, characterized in that: It includes a connecting base and a cleaning device. The connecting base is fixed to the end of the generator blade adjacent to the generator, and the cleaning device is sleeved on the generator blade and connected to the connecting base by a cable. The cleaning device includes multiple cleaning units distributed along the circumference of the generator blades, with adjacent cleaning units connected by a tightening rope. The connecting seat has a limiting seat on the side facing the cleaning device, and the cleaning device has a limiting post on the side facing the connecting seat; multiple water supply pipes are evenly arranged on the side of the connecting seat facing the cleaning device, and the number of water supply pipes is the same as the number of cleaning units of the cleaning device. The water supply pipes are used to supply water to the cleaning units; a power socket is also provided on the side of the connecting seat facing the cleaning device, and a control box is provided on the cleaning device. A power plug is provided at the end of the control box. The cleaning unit includes a cleaning bracket, a cleaning roller, and a cleaning water tank. The cleaning roller is mounted on the cleaning bracket and connected to a cleaning motor. The cleaning water tank is mounted on the back of the cleaning bracket and is equipped with a spray head. A V-shaped limiting connection frame is connected between the cleaning water tanks of two adjacent cleaning units. A V-shaped fixing frame is provided at both ends of each cleaning bracket. One end of the tightening rope is fixed to one end of the V-shaped fixing frame. A guide hole is provided inside the other end of the V-shaped fixing frame. A rope-retracting electric hoist is provided on the back of the V-shaped fixing frame. The other end of the tightening rope passes through the guide hole of the adjacent V-shaped fixing frame and is connected to the rope-retracting electric hoist on the V-shaped fixing frame. A water inlet is provided on the side of the cleaning water tank opposite to the connector, and the water supply pipe on the connector can be connected to the water inlet on the cleaning water tank. The first electric hoist is provided on the side of the connecting seat away from the cleaning device. The upper end of the cable is connected to the first electric hoist, and the lower end of the cable passes through the connecting seat and is fixedly connected to one of the cleaning brackets of the cleaning device. Two cable deflection pressure detection devices are installed on the connecting seat, symmetrically arranged on both sides of the cable. Each cable deflection pressure detection device includes a pulley, a pulley mounting bracket, a pressure sensor, and a pressure sensor mounting base. The pulley is mounted on the pulley mounting bracket, the pulley mounting bracket is mounted on one end of the pressure sensor, and the other end of the pressure sensor is mounted on the pressure sensor mounting base. The pressure sensor mounting base is fixedly installed on the connecting seat. The cable is clamped between the pulleys of the two cable deflection pressure detection devices. By comparing the pressure detection values ​​of the two devices, the direction of cable deflection is determined.

2. The wind turbine blade cleaning device according to claim 1, characterized in that: The cleaning bracket is C-shaped, with its opening facing the direction of the generator blades.

3. The wind turbine blade cleaning device according to claim 1, characterized in that: The cleaning roller is equipped with a cleaning brush on its outside, which contacts the outer side of the generator blade.

4. The wind turbine blade cleaning device according to claim 1, characterized in that: The cleaning water tank is rectangular in shape, with several spray arms evenly arranged on both sides of the width direction of the cleaning water tank. The ends of the spray arms are set towards the direction of the generator blades, and spray heads are provided at the ends of the spray arms.

5. The wind turbine blade cleaning device according to claim 1, characterized in that: The limiting connection frame includes two connecting rods of equal length, which are rotatably connected at opposite ends, and the outer ends of the connecting rods are rotatably connected to the side of the cleaning water tank; N sets of limiting connection frames are set between the cleaning water tanks of two adjacent cleaning units, where N is greater than or equal to 2.

6. The wind turbine blade cleaning device according to claim 1, characterized in that: The limiting seat is provided with an insertion hole, which includes a tapered guide hole section and an equal-diameter mating hole section; the limiting post is provided with a plug, which includes a top equal-diameter post section and a bottom tapered section; during docking, the top equal-diameter post section of the limiting post can be accurately inserted into the equal-diameter mating hole section of the limiting seat under the guidance of the tapered guide hole section of the limiting seat. At this time, the cleaning device and the connecting seat are completely aligned. Next, the top equal-diameter post section of the limiting post is inserted in a straight line along the equal-diameter mating hole section of the limiting seat. During the insertion process, the water supply pipe on the connecting seat is connected to the water inlet interface on the cleaning device, and the power socket on the connecting seat is connected to the power plug on the cleaning device.

7. The wind turbine blade cleaning device according to claim 1, characterized in that: The control box contains a controller and a power supply. The power supply is used to power each cleaning unit. The controller is connected to the cleaning unit via a line. The controller is also wirelessly connected to the pressure sensor of the first electric hoist and the cable deflection pressure detection device.

8. The method of using the wind turbine blade cleaning device as described in any one of claims 1-7, characterized in that: Fix the connecting seat to the end of the generator blade adjacent to the generator, and put the cleaning device on the outside of the generator blade; clean the generator blade in the downward position. During the cleaning operation, the controller controls the first electric hoist to release the cable, and the cleaning device moves along the length of the generator blade under the action of gravity, so that the cleaning device cleans the generator blade. During the cleaning process, the controller controls the spray head to spray water onto the outside of the generator blades, and the controller also controls the cleaning motor to rotate, which in turn drives the cleaning roller to clean the outside of the generator blades. During the cleaning process, a certain torque threshold is set for the electric hoist by the controller. When the shape of the generator blades changes, the distance between two adjacent cleaning units changes, resulting in a change in the torque force on the electric hoist. When the torque force on the electric hoist exceeds the set torque threshold, the controller controls the electric hoist to release the rope until the torque force on the electric hoist equals the set torque threshold. When the torque force on the electric hoist is less than the set torque threshold, the controller controls the electric hoist to tighten the rope until the torque force on the electric hoist equals the set torque threshold, thus enabling multiple cleaning units to stably cover the generator blades. After cleaning, the controller controls the first electric hoist to retract the cable, causing the cable to pull the cleaning device along the generator blades towards the connecting seat, bringing the cleaning device back to the connecting seat. During the retraction process, the pressure detection values ​​of the two cable deviation pressure detection devices are compared to determine the direction of cable deviation. Based on the direction of cable deviation, the cleaning motor is controlled to rotate forward or backward to control the cleaning device to rotate forward or backward along the circumference of the generator blades, continuously reducing the cable deviation. When the pressure detection values ​​of the two cable deviation pressure detection devices are equal, the controller considers the cable to be in a state perpendicular to the connecting seat. In this state, the cleaning device is docked with the connecting seat.

9. The method of using the wind turbine blade cleaning device according to claim 8, characterized in that: During the cleaning process of the cleaning roller sweeping the generator blades, by controlling the cleaning motors of different numbers of cleaning units to rotate forward or backward, the entire cleaning device can be controlled to rotate slowly around the generator blades, thereby increasing the cleaning contact surface.

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