Wind turbine generator blade deicing device and method

Abstract

The invention relates to the technical field of deicing devices, in particular to a wind turbine generator blade deicing device and method.The wind turbine generator blade deicing device comprises a fixing frame used for being connected with a deicing unmanned aerial vehicle and further comprises a magnetic attraction frame, the magnetic attraction frame is connected with the fixing frame through an electromagnet in a magnetic attraction mode, the electromagnet is fixed to the magnetic attraction frame, and a traction rope is fixed between the magnetic attraction frame and the fixing frame; an air pump is fixed to the top face of the negative pressure box, and the air pump communicates with the interior of the negative pressure box through a pipeline; the multiple first adsorption rods are fixed to the side wall of the magnetic attraction frame, and the ends of the first adsorption rods fixedly communicate with the negative pressure box; the magnetic attraction frame is attracted to the blade, the fixing frame is synchronously separated from the magnetic attraction frame, at the moment, the unmanned aerial vehicle can be controlled to be away from the blade, the vortex influence is further reduced, meanwhile, the overall weight of equipment on the surface of the magnetic attraction frame is reduced, the attraction stability is guaranteed, and then the subsequent deicing effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of deicing devices, in particular to a wind turbine blade deicing device and method. BACKGROUND

[0002] Wind turbines operating in cold regions are facing the severe challenge of blade icing, and the ice layer not only significantly reduces the efficiency of wind energy capture, but also may cause blade structural damage and even safety accidents. Currently, when deicing the blades of wind turbines, the mainstream technical solution relies on unmanned aerial vehicles (UAVs) carrying spraying devices or wind heating devices to implement the work. The former reduces the freezing point by spraying deicing agents, and the latter uses the physical method of hot air circulation to increase the temperature of the blade surface. These two methods have certain efficiency in dealing with thin ice layers and can achieve ice layer peeling through continuous work. However, when facing thick ice, the limitations of the above technologies are exposed. The deicing agent needs to penetrate deep into the ice layer to be effective, and the heat conduction efficiency of the hot air device decreases exponentially with the thickening of the ice layer, resulting in a single deicing operation lasting for several hours, which seriously affects the continuous operation of wind power equipment.

[0003] For thick ice scenarios, some technologies attempt to integrate mechanical knocking deicing devices at the bottom of the UAV, trying to break the ice layer through physical impact. However, this solution faces significant aerodynamic problems in actual application. When the UAV approaches the wind turbine blade to perform work, the complex surface of some positions on the blade surface will disturb the airflow field generated by the UAV rotor, forming high-intensity vortices at specific positions such as the leading edge and trailing edge of the blade. These vortices will cause the lift distribution of the UAV to be unbalanced, causing the UAV body to shake violently. This not only suddenly increases the mechanical knocking force, causing scratches or indentations on the protective coating of the blade surface, affecting the deicing function, but also may cause sudden position deviation. In extreme cases, the UAV may directly collide with the blade due to control failure, forcing the deicing operation to be interrupted. SUMMARY

[0004] The purpose of the present application is to solve the problem in the prior art that for thick ice scenarios, the UAV is difficult to carry a mechanical deicing device close to the blade for stable deicing, and a wind turbine blade deicing device and method are proposed.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a wind turbine blade deicing device, comprising a fixing frame, the fixing frame is used to connect with a deicing UAV, further comprising: a magnetic attraction frame, the magnetic attraction frame is connected with the fixing frame through an electromagnet, the electromagnet is fixed on the magnetic attraction frame, and a traction rope is fixed between the magnetic attraction frame and the fixing frame; a negative pressure box, a gas pump is fixed on the top surface of the negative pressure box, and the gas pump is in communication with the inside of the negative pressure box through a pipeline; A first adsorption rod has a plurality of first adsorption rods fixed on the side wall of the magnetic adsorption frame, and the end of the first adsorption rod is fixedly communicated with the negative pressure box. The deicing assembly is arranged at the bottom of the magnetic adsorption frame, and the deicing assembly is used for knocking the fan blade to remove ice.

[0006] Specifically, first, the unmanned aerial vehicle carries a spraying device to spray deicing agent on the surface of the blade. The thin ice layer on the surface of the blade will quickly melt. Then, the deicing assembly is installed at the bottom of the magnetic adsorption frame, the fixing frame is fixed at the bottom of the unmanned aerial vehicle, and the magnetic adsorption frame is adsorbed on the fixing frame, so that the unmanned aerial vehicle is connected with the deicing assembly. After starting the unmanned aerial vehicle, find a position on the blade surface that is relatively flat and free of ice, reduce the influence of vortex and ice layer, make the unmanned aerial vehicle close to the blade, make the first adsorption rod close to the blade, and start the air pump in the negative pressure box to suck the gas in the negative pressure box, so that the first adsorption rod generates negative pressure effect, thereby adsorbing the magnetic adsorption frame on the surface of the blade. It should be noted that the blade is usually made of non-magnetic materials such as glass fiber, so it is difficult to be adsorbed by magnetic adsorption. When the magnetic adsorption frame is adsorbed on the blade, the adsorption state of the electromagnet to the fixing frame is cancelled, so that the fixing frame is separated from the magnetic adsorption frame. At this time, the unmanned aerial vehicle can be controlled to move away from the blade, further reducing the influence of vortex, and also reducing the overall weight of the equipment on the surface of the magnetic adsorption frame, ensuring the stability of adsorption, and further ensuring the deicing effect. After the unmanned aerial vehicle moves away, the deicing assembly knocks the fan blade to remove ice. It should be noted that the fixing frame is connected with the magnetic adsorption frame through the traction rope, and the traction rope is provided with an electric wire, so that the battery of the unmanned aerial vehicle can be used to supply power to the deicing assembly and the air pump and other equipment. The battery is connected with the unmanned aerial vehicle, and the magnetic adsorption frame is separated from the magnetic adsorption frame, so as to reduce the overall weight of the equipment on the surface of the magnetic adsorption frame, further ensure the stability of adsorption, and connect the magnetic adsorption frame with the magnetic adsorption frame through the traction rope. Even if the magnetic adsorption frame is separated from the blade due to unstable adsorption during the deicing process, the traction rope can also be pulled to avoid the magnetic adsorption frame and its equipment falling directly to the ground and causing loss.

[0007] Preferably, the deicing assembly comprises an installation box fixed at the bottom of the magnetic adsorption frame, a push plate and a vibration plate slidably connected in the installation box, a first spring fixed between the push plate and the vibration plate, a first electric push rod fixed on the outer wall of the installation box, the movable end of the first electric push rod being fixed with the push plate, a vibration motor fixed on the surface of the vibration plate, and a plurality of knocking hammers fixed on the surface of the vibration plate.

[0008] Specifically, by starting the vibration motor, the vibration plate and the knocking hammer can be driven to vibrate, by starting the first electric push rod, the pushing plate, the first spring, the vibration plate and the knocking hammer can be driven to move to the outside of the mounting box and close to the ice surface of the blade surface layer, and the thick ice surface can be vibrated and removed, and in the vibration process, by controlling the pushing distance of the first electric push rod, the knocking hammer and the blade surface always have a protection gap, so that the knocking hammer can not directly hit the blade surface, thereby reducing the damage to the blade surface, but part of the thin ice on the blade surface needs to be treated by subsequent spraying of deicing agent.

[0009] Preferably, a plurality of sliding grooves are formed in the side wall of the magnetic bracket, and a second adsorption rod is slidably connected in each sliding groove.

[0010] Preferably, a plurality of sliding grooves are formed in the side wall of the magnetic bracket, and a second adsorption rod is slidably connected in each sliding groove. Specifically, after the unmanned aerial vehicle is separated from the magnetic bracket, the deicing assembly starts deicing operation, but the deicing operation range is small, and if the position of the magnetic bracket is adjusted by the unmanned aerial vehicle to adjust the deicing operation range, it is not only troublesome, but also increases the risk of vortex, therefore, the second adsorption rod is arranged, when it is necessary to adjust the position of the magnetic bracket, the step motor is started to drive the threaded rod to rotate, so that the connecting plate moves downward, the second adsorption rod is driven by the connecting plate to move downward to the bottom end of the sliding groove, and the second adsorption rod is adsorbed to the blade, at this time, the adsorption state of the first adsorption rod is cancelled, and the step motor is started again to drive the connecting plate to move upward, and at this time, the connecting plate is in a fixed state under the adsorption action of the second adsorption rod, so that the magnetic bracket can move downward relative to the connecting plate, and the deicing assembly moves downward synchronously, thereby automatically adjusting the deicing operation range, without the need to be connected with the unmanned aerial vehicle again, not only speeding up the deicing efficiency, but also further reducing the risk of vortex. It should be noted that the first adsorption rod and the second adsorption rod are both provided with an adjusting valve to control the suction state.

[0011] Preferably, the first adsorption rod and the second adsorption rod each include a fixed tube, a movable tube and an adsorption head, the fixed tube is connected with the magnetic bracket, the movable tube is inserted into the fixed tube, the adsorption head is fixedly connected with the end of the movable tube, a second electric push rod is fixed on the end surface of the fixed tube, and the movable end of the second electric push rod is fixed to the surface of the adsorption head.

[0012] Preferably, the inside of the adsorption head is provided with a sliding frame, the inside of the movable pipe is fixedly provided with a supporting ring, the supporting ring and the sliding frame are fixedly provided with a second spring, the sliding frame is rotatably connected with a moving pipe, the surface of the sliding frame is fixedly provided with a motor, the output shaft of the motor is fixed with the moving pipe, the end of the moving pipe is fixed with a mounting box, the inside of the mounting box is fixed with a third electric push rod, the movable end of the third electric push rod is fixed with a scraping block, and the top surface of the scraping block is provided with a plurality of hammering pins.

[0013] Preferably, the end surface of the moving pipe is rotatably connected with a plurality of rolling balls, the bottom surface of the scraping block is provided with a mounting cavity, the inside of the mounting cavity is vertically and slidably connected with a striking plate, the top surface of the striking plate is fixedly provided with a plurality of striking blocks, the top surface of the striking block and the hammering pin are fixedly provided with a third spring, the top surface of the striking plate and the inner wall of the scraping block are fixedly provided with a fourth spring, the surface of the hammering pin is fixedly provided with a limiting ring on the inside and outside of the moving pipe, the end surface of the hammering pin has a circular arc surface, and the inside of the mounting cavity is provided with a guide assembly for guiding the striking plate to automatically pop up after moving downward and strike the hammering pin.

[0014] Preferably, the guide assembly comprises two guide plates, the two guide plates are fixedly provided on the inner wall of the mounting box, the striking plate is arranged between the two guide plates, the surface of the guide plate is provided with a horizontal groove and a guide groove, the horizontal groove is communicated with one end of the guide groove, the guide groove comprises a plurality of vertical grooves, adjacent vertical grooves have an inclined groove, one end of the inclined groove is communicated with the bottom of one of the vertical grooves, the other end of the inclined groove is communicated with the top of the other vertical groove, a guide pin is inserted in the vertical groove, an insertion slot is formed in the side wall of the striking plate, the guide pin is inserted in the insertion slot, a fifth spring is arranged between the guide pin and the insertion slot, and the end surface of the guide pin has an inclined surface away from the horizontal groove.

[0015] Preferably, the hammering pin comprises a fixed part and a movable part, the fixed part is fixedly connected with the third spring, the movable part is inserted in the fixed part, the sixth spring is arranged between the inner wall of the fixed part and the movable part, and a plurality of scraping pins are fixedly arranged on the outer wall of the upper limiting ring.

[0016] Preferably, the top surface of the adsorption head is fixedly provided with two heating rings, the outer side of the heating ring is fixedly provided with a sealed air bag, one of the sealed air bags is located inside the other sealed air bag, the adsorption head is fixedly provided with an adjusting pump, and the adjusting pump is communicated with the two sealed air bags through pipelines.

[0017] A wind turbine blade deicing method, the deicing method comprising the following steps: Step one, starting the unmanned aerial vehicle, and finding a position on the surface of the wind turbine blade which is flat and free of ice through the unmanned aerial vehicle camera; Step two, control the unmanned aerial vehicle close to the fan blade, make the first adsorption rod and the fan blade close, and carry out adsorption at the same time; Step three, cancel the adsorption state of the magnetic suction frame and the fixed frame, control the unmanned aerial vehicle to separate from the magnetic suction frame and away from the fan blade; Step four, control the deicing assembly to knock the fan blade for deicing.

[0018] Compared with the prior art, the present application has the following beneficial effects: I. The present application can control the unmanned aerial vehicle to move away from the blade by adsorbing the magnetic suction frame on the blade and synchronously separating the fixed frame from the magnetic suction frame, further reducing the influence of vortex, and also reducing the overall weight of the surface equipment of the magnetic suction frame, ensuring the stability of adsorption, and further ensuring the subsequent deicing effect.

[0019] II. By connecting the traction rope with the magnetic suction frame, even if the magnetic suction frame is separated from the blade due to unstable adsorption during deicing, the traction rope can be pulled to avoid the magnetic suction frame and its equipment falling directly to the ground and causing loss.

[0020] III. During the vibration process, by controlling the pushing distance of the first electric push rod, a protective gap is always maintained between the knocking hammer and the surface of the blade, which can avoid the knocking hammer directly hitting the surface of the blade, thereby reducing the damage to the surface of the blade.

[0021] IV. The present application inserts a moving pipe in the adsorption head. When the first adsorption rod or the second adsorption rod contacts the blade, the hammering needle on the scraping block at the end of the moving pipe will first contact the thin ice layer on the surface of the blade. By starting the motor, the moving pipe can be driven to rotate, thereby driving the scraping block and the hammering needle to rotate, cleaning the thin ice layer on the surface of the blade in advance, ensuring that the subsequent adsorption head can directly contact the blade, thereby ensuring the stability of the adsorption head during adsorption. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The overall structure of the present application is shown in the figure.

[0023] Figure 2 The cross-sectional structure of the installation box of the present application is shown in the figure.

[0024] Figure 3 The cross-sectional structure of the movable pipe and the adsorption head of the present application is shown in the figure.

[0025] Figure 4 The cross-sectional structure of the movable pipe and the adsorption head of the present application is shown in the figure. Figure 3 The enlarged structure of A in the present application is shown in the figure.

[0026] Figure 5 The sliding frame and the moving pipe structure of the present application are shown in the figure.

[0027] Figure 6 A schematic view of the cross-sectional structure of the scraping block and the guide plate of the present application.

[0028] Figure 7 A schematic view of the cross-sectional structure of the scraping block and the fixed part of the present application.

[0029] Figure 8 A schematic view of the cross-sectional structure of the impact plate of the present application.

[0030] Figure 9 A flow chart of the method of the present application.

[0031] In the figure: 1, fixed frame; 2, magnetic bracket; 3, electromagnet; 4, traction rope; 5, negative pressure box; 6, air pump; 7, first adsorption rod; 8, mounting box; 9, push plate; 10, vibration plate; 11, first spring; 12, first electric push rod; 13, vibration motor; 14, knocking hammer; 15, sliding groove; 16, second adsorption rod; 17, connecting plate; 18, positioning plate; 19, threaded rod; 20, guide rod; 21, stepping motor; 22, fixed tube; 23, movable tube; 24, adsorption head; 25, second electric push rod; 26, sliding frame; 27, support ring; 28, second spring; 29, moving tube; 30, motor; 31, mounting box; 32, third electric push rod; 33, scraping block; 34, hammering needle; 35, ball; 36, mounting cavity; 37, impact plate; 38, impact block; 39, third spring; 40, fourth spring; 41, limiting ring; 42, guide plate; 43, horizontal groove; 44, vertical groove; 45, inclined groove; 46, guide pin; 47, insertion slot; 48, fifth spring; 49, inclined surface; 50, fixed part; 51, movable part; 52, sixth spring; 53, scraping needle; 54, heating ring; 55, sealed air bag; 56, adjusting pump. DETAILED DESCRIPTION

[0032] The following description is provided to enable those skilled in the art to implement the present application. The preferred embodiments in the following description are only examples of the present application, and other obvious modifications can be made by those skilled in the art.

[0033] As Figures 1 to 8 shown in a wind turbine blade deicing device, comprising a fixed frame 1, the fixed frame 1 is used to connect with the deicing unmanned aerial vehicle, further comprising: magnetic bracket 2, the magnetic bracket 2 and the fixed frame 1 are connected by the electromagnet 3, the electromagnet 3 is fixed on the magnetic bracket 2, the traction rope 4 is fixed between the magnetic bracket 2 and the fixed frame 1; negative pressure box 5, the top surface of the negative pressure box 5 is fixed with the air pump 6, the air pump 6 is communicated with the inside of the negative pressure box 5 through the pipeline; first adsorption rod 7, the first adsorption rod 7 has a plurality of, the first adsorption rod 7 is fixed on the side wall of the magnetic bracket 2, the end of the first adsorption rod 7 is fixedly communicated with the negative pressure box 5; The deicing assembly is arranged at the bottom of the magnetic bracket 2, and is used for knocking the wind turbine blade to remove ice.

[0034] Specifically, in the process of deicing the wind turbine blade, if the unmanned aerial vehicle is too close to the wind turbine blade, vortex may occur at some positions, which affects the flight stability of the unmanned aerial vehicle and the deicing effect. The present application can solve the above problems. The specific working mode is as follows: first, the unmanned aerial vehicle carries a spraying device to spray deicing agent on the surface of the blade. The thin ice layer on the surface of the blade will quickly melt. Then, the deicing assembly is installed at the bottom of the magnetic bracket 2, the fixing frame 1 is fixed at the bottom of the unmanned aerial vehicle, and the magnetic bracket 2 is adsorbed on the fixing frame 1, so that the unmanned aerial vehicle is connected with the deicing assembly. After starting the unmanned aerial vehicle, find a position on the surface of the blade which is relatively flat and free of ice, reduce the influence of vortex and ice layer, make the unmanned aerial vehicle close to the blade, make the first adsorption rod 7 close to the blade, and start the air pump 6 on the negative pressure box 5 to suck the gas in the negative pressure box 5, so that the first adsorption rod 7 generates negative pressure effect, thereby adsorbing the magnetic bracket 2 on the surface of the blade. It should be noted that the blade is usually made of non-magnetic materials such as glass fiber, so it is difficult to be adsorbed by magnetic attraction. When the magnetic bracket 2 is adsorbed on the blade, the adsorption state of the electromagnet 3 to the fixing frame 1 is cancelled, so that the fixing frame 1 is separated from the magnetic bracket 2. At this time, the unmanned aerial vehicle can be controlled to move away from the blade, further reducing the influence of vortex, and also reducing the overall weight of the equipment on the surface of the magnetic bracket 2, ensuring the stability of adsorption, and further ensuring the deicing effect. After the unmanned aerial vehicle moves away, the deicing assembly knocks the wind turbine blade to remove ice. It should be noted that the fixing frame 1 is connected with the magnetic bracket 2 through the traction rope 4, the traction rope 4 is provided with an electric wire, so that the battery of the unmanned aerial vehicle can supply power to the deicing assembly, the air pump 6 and other equipment, the battery is connected with the unmanned aerial vehicle, and the magnetic bracket 2 moves away, which can also reduce the overall weight of the equipment on the surface of the magnetic bracket 2, further ensure the stability of adsorption, and connect the magnetic bracket 2 with the traction rope 4. Even if the magnetic bracket 2 is separated from the blade due to unstable adsorption during deicing, the magnetic bracket 2 and its equipment can also be pulled by the traction rope 4 to avoid direct falling to the ground and causing loss.

[0035] As a further embodiment of the present application, the deicing assembly comprises a mounting box 8 fixed at the bottom of the magnetic bracket 2, a pushing plate 9 and a vibrating plate 10 slidably connected in the mounting box 8, a first spring 11 fixed between the pushing plate 9 and the vibrating plate 10, a first electric push rod 12 fixed on the outer wall of the mounting box 8, the movable end of the first electric push rod 12 being fixed with the pushing plate 9, a vibrating motor 13 fixed on the surface of the vibrating plate 10, and a plurality of knocking hammers 14 fixed on the surface of the vibrating plate 10.

[0036] Specifically, by starting the vibration motor 13, the vibration plate 10 and the knocking hammer 14 can be driven to vibrate, by starting the first electric push rod 12, the push plate 9, the first spring 11, the vibration plate 10 and the knocking hammer 14 can be driven to move to the outside of the mounting box 8 and close to the ice surface of the blade surface layer, and the thick ice surface is vibrated and cleaned, and in the vibration process, by controlling the pushing distance of the first electric push rod 12, the knocking hammer 14 and the blade surface always have a protection gap, so that the knocking hammer 14 is prevented from directly hammering the blade surface, thereby reducing the damage to the blade surface, but part of the thin ice on the blade surface needs to be treated by subsequent spraying of deicing agent.

[0037] As a further embodiment of the application, a plurality of sliding grooves 15 are formed in the side wall of the magnetic bracket 2, and a second adsorption rod 16 is slidably connected in each sliding groove 15, and a connecting plate 17 is fixed between the second adsorption rods 16. A linear screw drive assembly is fixed on the magnetic bracket 2, and the linear screw drive assembly is used to drive the connecting plate 17 to slide along the length direction of the sliding groove 15.

[0038] The linear screw drive assembly includes two positioning plates 18, both of which are fixed on the magnetic bracket 2, and a threaded rod 19 and a guide rod 20 are rotatably connected between the two positioning plates 18. One end of the threaded rod 19 is fixed with a stepping motor 21, and the stepping motor 21 is fixed on one of the positioning plates 18. The threaded rod 19 is threadedly connected with the connecting plate 17, and the guide rod 20 is slidably connected with the connecting plate 17. Specifically, after the unmanned aerial vehicle separates from the magnetic bracket 2, the deicing assembly starts deicing operation, but the deicing operation range is small. If the position of the magnetic bracket 2 is adjusted by the unmanned aerial vehicle to adjust the deicing operation range, it is not only troublesome, but also increases the risk of vortex. Therefore, the second adsorption rod 16 is provided, and when it is necessary to adjust the position of the magnetic bracket 2, the stepping motor 21 is started to drive the threaded rod 19 to rotate, so that the connecting plate 17 moves downward, the second adsorption rod 16 is driven by the connecting plate 17 to move downward to the bottom end of the sliding groove 15, and is adsorbed by the second adsorption rod 16. At this time, the adsorption state of the first adsorption rod 7 is cancelled, and the stepping motor 21 is started again to drive the connecting plate 17 to move upward, and at this time the connecting plate 17 is in a fixed state under the adsorption of the second adsorption rod 16, so that the magnetic bracket 2 can move downward relative to the connecting plate 17, and the deicing assembly moves downward synchronously, thereby automatically adjusting the deicing operation range without the need to connect with the unmanned aerial vehicle again. Not only does it speed up the deicing efficiency, but it also further reduces the risk of vortex. It should be noted that the first adsorption rod 7 and the second adsorption rod 16 are both provided with an adjusting valve to control the air suction state.

[0039] As a further embodiment of the present application, the first adsorption rod 7 and the second adsorption rod 16 each comprise a fixed tube 22, a movable tube 23 and an adsorption head 24, the fixed tube 22 is connected with the magnetic bracket 2, the movable tube 23 is inserted in the inside of the fixed tube 22, the adsorption head 24 is fixedly communicated with the end of the movable tube 23, the end surface of the fixed tube 22 is fixed with a second electric push rod 25, and the movable end of the second electric push rod 25 is fixed with the surface of the adsorption head 24.

[0040] Specifically, in the process of lowering the first adsorption rod 7 along with the magnetic bracket 2, it is necessary to first move away from the blade to avoid the frictional contact between the adsorption head 24 and the blade, which affects the stability in the moving process, therefore, by starting the second electric push rod 25 to contract, the adsorption head 24 and the movable tube 23 are pulled to move to the side close to the fixed tube 22, so that the overall length of the first adsorption rod 7 is shortened, thereby avoiding the sliding friction between the adsorption head 24 and the blade, and similarly, the same operation is also performed when the second adsorption rod 16 is lowered. It should be noted that the fixed tube 22 of the first adsorption rod 7 is fixed with the magnetic bracket 2, and the fixed tube 22 of the second adsorption rod 16 is slidingly connected in the sliding groove 15.

[0041] As a further embodiment of the present application, a sliding frame 26 is inserted in the inside of the adsorption head 24, a supporting ring 27 is fixed in the inside of the movable tube 23, a second spring 28 is fixed between the supporting ring 27 and the sliding frame 26, a movable tube 29 is rotatably connected on the sliding frame 26, a motor 30 is fixed on the surface of the sliding frame 26, the output shaft of the motor 30 is fixed with the movable tube 29, an installation box 31 is fixed at the end of the movable tube 29, a third electric push rod 32 is fixed in the inside of the installation box 31, a scraping block 33 is fixed at the movable end of the third electric push rod 32, and a plurality of hammering needles 34 are arranged on the top surface of the scraping block 33.

[0042] Specifically, as known from the above embodiment, when hammering to remove ice, there is still some thin ice on the surface of the blade, and when the first adsorption rod 7 and the second adsorption rod 16 move to adjust the position of the magnetic bracket 2, if there is still thin ice on the blade, it will affect the adsorption performance of the first adsorption rod 7 and the second adsorption rod 16, therefore, the present application inserts the movable tube 29 in the adsorption head 24, when the first adsorption rod 7 or the second adsorption rod 16 contacts the blade, the hammering needles 34 on the scraping block 33 at the end of the movable tube 29 will first contact the thin ice layer on the surface of the blade, and by starting the motor 30, the movable tube 29 can be driven to rotate, thereby driving the scraping block 33 and the hammering needles 34 to rotate, so as to clean the thin ice layer on the surface of the blade in advance, to ensure that the adsorption head 24 can directly contact the blade, thereby ensuring the stability of the adsorption head 24 when adsorbing. It should be noted that by setting the second spring 28, the movable pipe 23 can compress the second spring 28 through the support ring 27 when it is extended, and can be displaced, so that the hammer needle 34 can always contact the ice layer during the process that the suction head 24 approaches the blade, and the ice removing effect is ensured. And before the suction head 24 contacts the blade, the scraping block 33 can be moved into the mounting box 31 by starting the third electric push rod 32, so as to avoid that the scraping block 33 causes the suction head 24 to be blocked when contacting the blade.

[0043] As a further embodiment of the present application, the end surface of the movable pipe 29 is rotatably connected with a plurality of rolling balls 35, the bottom surface of the scraping block 33 is provided with a mounting cavity 36, the inside of the mounting cavity 36 is vertically and slidably connected with a striking plate 37, the top surface of the striking plate 37 is fixed with a plurality of striking blocks 38, the top surface of the striking block 38 is fixed with a third spring 39 between the hammer needle 34, the top surface of the striking plate 37 is fixed with a fourth spring 40 between the inner wall of the scraping block 33, the surface of the hammer needle 34 is fixed with a limiting ring 41 on the inside and outside of the movable pipe 29, the end surface of the hammer needle 34 has a circular arc surface, the inside of the mounting cavity 36 is provided with a guide assembly, the guide assembly is used for guiding the striking plate 37 to automatically pop up after moving downward, and striking the hammer needle 34.

[0044] The guide assembly comprises two guide plates 42, the two guide plates 42 are fixed on the inner wall of the mounting box 31, the striking plate 37 is arranged between the two guide plates 42, the surface of the guide plate 42 is provided with a horizontal groove 43 and a guide groove, the horizontal groove 43 is communicated with one end of the guide groove, the guide groove comprises a plurality of vertical grooves 44, adjacent vertical grooves 44 have an inclined groove 45, one end of the inclined groove 45 is communicated with the bottom of one of the vertical grooves 44, the other end of the inclined groove 45 is communicated with the top of the other vertical groove 44, a guide pin 46 is inserted in the vertical groove 44, an insertion slot 47 is formed in the side wall of the striking plate 37, the end of the guide pin 46 is inserted into the insertion slot 47, a fifth spring 48 is fixed between the guide pin 46 and the insertion slot 47, and the end surface of the guide pin 46 has an inclined surface 49 away from one side of the horizontal groove 43.

[0045] Specifically, the hammer needle 34 directly slides with the ice layer on the blade, although it can complete the ice removing function, but as the ice layer thins, the hammer needle 34 will slide between the blade and cause damage to the blade, the present application can solve the above problems, and the specific working mode is as follows: by setting the rolling ball 35, when the movable pipe 29 contacts the ice layer on the blade, the rolling ball 35 can roll on the ice layer, and after the ice removing is completed, the rolling ball 35 can roll on the surface of the blade, thereby avoiding the sliding friction between the movable pipe 29 and the blade, and the damage to the blade. Further, the guide pin 46 is in the top end of the vertical slot 44 in the initial state, by starting the third electric push rod 32 to pull the scraping block 33 to move to the inside of the mounting box 31, by the scraping block 33 to drive the impact plate 37 to move, the guide pin 46 moves to the inclined slot 45, and under the guidance of the inclined slot 45, the impact plate 37 moves to the bottom of the scraping block 33, the impact plate 37 pulls the third spring 39 and the hammer needle 34 to move downward, at this time, the ball 35 contacts the ice layer on the blade surface, and the hammer needle 34 moves away from the blade and the ice layer; When the limiting ring 41 above the hammer needle 34 contacts the surface of the scraping block 33, the hammer needle 34 stops moving downward under the blocking action of the limiting ring 41, at this time, the impact plate 37 continues to move downward and stretches the third spring 39, in this process, the fourth spring 40 is always in a state of being pulled, when the guide pin 46 on the impact plate 37 moves to the other side of the vertical slot 44 to the bottom, the pulling action of the fourth spring 40 suddenly disappears, the elastic potential energy of the fourth spring 40 is released instantaneously, and the impact plate 37 is pulled upward at high speed, and this high-speed movement is transmitted to the hammer needle 34 through the third spring 39, so that the hammer needle 34 produces strong impact on the ice layer, thereby breaking the thin ice layer and making the thin ice layer fall off; When the hammer needle 34 impacts the blade, the third electric push rod 32 is started to push the scraping block 33 to reset, so that the impact plate 37 and the guide pin 46 are reset, and at this time the guide pin 46 is blocked by the vertical slot 44, since the side wall of the guide pin 46 is provided with an inclined surface 49, under the guidance of the inclined surface 49, the guide pin 46 can be retracted into the insertion slot 47, thereby being reset, when the guide pin 46 moves to the initial vertical slot 44, under the elastic force of the fifth spring 48, it will re-enter the initial vertical slot 44; In summary, by reciprocatingly pushing and pulling the scraping block 33, the hammer needle 34 can continuously impact the ice layer to complete the deicing operation, in this process, the hammer needle 34 only has a short sliding contact with the surface of the blade in the reset stage, rather than continuous friction, since the device uses hammering rather than scraping to remove ice, the end of the hammer needle 34 is designed as a circular arc surface structure, which on the one hand shortens the sliding contact time with the blade, and on the other hand, by virtue of the smooth transition characteristics of the circular arc surface, significantly reduces the damage to the surface of the blade caused by sliding friction.

[0046] As a further embodiment of the application, the hammer needle 34 comprises a fixed part 50 and a movable part 51, the fixed part 50 is fixedly connected with the third spring 39, the movable part 51 is inserted into the fixed part 50, the sixth spring 52 is fixed between the inner wall of the fixed part 50 and the movable part 51, and a plurality of scraping needles 53 are fixed on the outer wall of the limiting ring 41 above.

[0047] Specifically, after the ice layer is hit, cracks will be generated, part of the ice layer will not immediately fall off, but will move and bulge around. In the above embodiment, multiple hits are required to make the broken ice layer separate. The hammering needle 34 is arranged in an extension state. When the hammering needle 34 is ejected, the movable part 51 first contacts the ice surface, and point-type breaking is performed by using the instantaneous impact force released by the spring. Part of the ice layer bulges around under the action of the impact. At this time, the movable part 51 is retracted under the action of the ice surface reaction force, and the tip of the scraping needle 53 immediately inserts into the bulging ice layer. The broken ice layer is peeled off the surface of the blade by transverse scraping. The two-stage action of first breaking and then peeling significantly improves the deicing efficiency. It should be noted that the height of the scraping needle 53 is always lower than the height of the ball 35, so that the scraping needle 53 does not contact the blade and only contacts the bulging ice layer, thereby avoiding damage to the blade.

[0048] As a further embodiment of the present application, two heating rings 54 are fixed on the top surface of the suction head 24. The outer side of each heating ring 54 is sleeved with a sealed air bag 55. One sealed air bag 55 is located inside the other sealed air bag 55. An adjusting pump 56 is fixed on the suction head 24 and communicates with the two sealed air bags 55 through pipelines. Specifically, in a low-temperature state, the sealed air bag 55 made of rubber material may become hard, affecting the sealing performance. The present application heats the sealed air bag 55 by setting the heating ring 54 to ensure the softness of its surface and thus ensure the sealing performance. However, in the process of cleaning thin ice, a large amount of ice blocks will separate from the blade under the action of impact, but part of the ice residue will still remain on the surface of the blade. The ice residue is squeezed between the sealed air bag 55 and the blade. Under the subsequent heating action, it melts into liquid water, which forms a water film between the sealed air bag 55 and the surface of the blade, reducing the close fit between the two. The present application adjusts the air in the sealed air bag 55 by setting the adjusting pump 56. By switching the inflation state of the sealed air bag 55, the contact state of the two sealed air bags 55 with the blade is switched. Only one sealed air bag 55 is maintained in contact with the blade. When the other sealed air bag 55 separates from the blade, the melted liquid water can flow down and separate from the sealed air bag 55. The setting of the heating plate can also continuously heat and accelerate the evaporation of the liquid.

[0049] As shown in Figure 9 A wind turbine blade deicing method, the deicing method comprising the following steps: Step one, start the unmanned aerial vehicle, and find a position on the surface of the wind turbine blade that is flat and free of ice through the unmanned aerial vehicle camera; Step two, control the unmanned aerial vehicle to approach the wind turbine blade, make the first suction rod 7 tightly contact the wind turbine blade, and simultaneously perform suction; Step three, cancel the adsorption state of the magnetic bracket 2 and the fixed bracket 1, control the unmanned aerial vehicle to separate from the magnetic bracket 2 and away from the fan blades; Step four, control the deicing assembly to knock the fan blades for deicing.

[0050] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A de-icing device for wind turbine blades, comprising a mounting frame (1) for connecting to a de-icing drone, characterized in that, Also includes: A magnetic suction frame (2) is connected to a fixed frame (1) by an electromagnet (3). The electromagnet (3) is fixed on the magnetic suction frame (2). A traction rope (4) is fixed between the magnetic suction frame (2) and the fixed frame (1). A negative pressure box (5) is provided, and an air pump (6) is fixed on the top surface of the negative pressure box (5). The air pump (6) is connected to the inside of the negative pressure box (5) through a pipe. The first adsorption rod (7) has multiple first adsorption rods (7), the first adsorption rod (7) is fixed on the side wall of the magnetic suction frame (2), and the end of the first adsorption rod (7) is fixedly connected to the negative pressure box (5). The de-icing assembly is located at the bottom of the magnetic suction frame (2) and is used to knock out the ice from the fan blades.

2. The de-icing device for wind turbine blades according to claim 1, characterized in that: The de-icing assembly includes a mounting box (8), which is fixed to the bottom of the magnetic suction frame (2). Inside the mounting box (8), a push plate (9) and a vibrating plate (10) are slidably connected. A first spring (11) is fixed between the push plate (9) and the vibrating plate (10). A first electric push rod (12) is fixed on the outer wall of the mounting box (8). The movable end of the first electric push rod (12) is fixed to the push plate (9). A vibration motor (13) is fixed on the surface of the vibrating plate (10). Multiple hammers (14) are fixed on the surface of the vibrating plate (10).

3. The de-icing device for wind turbine blades according to claim 2, characterized in that: The magnetic suction frame (2) has multiple sliding grooves (15) on its side wall. Each sliding groove (15) is slidably connected to a second adsorption rod (16). A connecting plate (17) is fixed between the second adsorption rods (16). A linear screw drive assembly is fixed on the magnetic suction frame (2). The linear screw drive assembly is used to drive the connecting plate (17) to slide along the length direction of the sliding groove (15).

4. A wind turbine blade de-icing device according to claim 3, characterized in that: The first adsorption rod (7) and the second adsorption rod (16) both include a fixed tube (22), a movable tube (23) and an adsorption head (24). The fixed tube (22) is connected to the magnetic frame (2). The movable tube (23) is inserted inside the fixed tube (22). The adsorption head (24) is fixedly connected to the end of the movable tube (23). A second electric push rod (25) is fixed on the end face of the fixed tube (22). The movable end of the second electric push rod (25) is fixed to the surface of the adsorption head (24).

5. A wind turbine blade de-icing device according to claim 4, characterized in that: The suction head (24) is fitted with a sliding frame (26), the movable tube (23) is fixed with a support ring (27), a second spring (28) is fixed between the support ring (27) and the sliding frame (26), a moving tube (29) is rotatably connected to the sliding frame (26), a motor (30) is fixed on the surface of the sliding frame (26), the output shaft of the motor (30) is fixed to the moving tube (29), a mounting box (31) is fixed at the end of the moving tube (29), a third electric push rod (32) is fixed inside the mounting box (31), a scraping block (33) is fixed at the movable end of the third electric push rod (32), and a plurality of hammering pins (34) are provided on the top surface of the scraping block (33).

6. A wind turbine blade de-icing device according to claim 5, characterized in that: Multiple ball bearings (35) are rotatably connected to the end face of the moving tube (29). An installation cavity (36) is provided on the bottom surface of the scraping block (33). An impact plate (37) is vertically slidably connected inside the installation cavity (36). Multiple impact blocks (38) are fixed on the top surface of the impact plate (37). A third spring (39) is fixed between the top surface of the impact block (38) and the hammer needle (34). A fourth spring (40) is fixed between the top surface of the impact plate (37) and the inner wall of the scraping block (33). Limiting rings (41) are fixed on both the inner and outer sides of the surface of the hammer needle (34) located in the moving tube (29). The end face of the hammer needle (34) has an arc surface. A guide component is provided inside the installation cavity (36). The guide component is used to guide the impact plate (37) to move down and then automatically bounce up to impact the hammer needle (34).

7. A wind turbine blade de-icing device according to claim 6, characterized in that: The guiding assembly includes two guide plates (42), both of which are fixed to the inner wall of the mounting box (31). The impact plate (37) is disposed between the two guide plates (42). A horizontal groove (43) and a guide groove are formed on the surface of the guide plate (42). One end of the horizontal groove (43) is connected to one end of the guide groove. The guide groove includes multiple vertical grooves (44). An inclined groove (45) is formed between adjacent vertical grooves (44). One end of the inclined groove (45) is connected to one of the vertical grooves. The bottom of one vertical groove (44) is connected, and the other end of the inclined groove (45) is connected to the top of another vertical groove (44). A guide pin (46) is inserted into the vertical groove (44). A slot (47) is opened on the side wall of the impact plate (37). The end of the guide pin (46) is inserted into the slot (47). A fifth spring (48) is fixed between the guide pin (46) and the slot (47). The end face of the guide pin (46) away from the horizontal groove (43) has an inclined surface (49).

8. A wind turbine blade de-icing device according to claim 6, characterized in that: The hammering needle (34) includes a fixed part (50) and a movable part (51). The fixed part (50) is fixedly connected to the third spring (39). The movable part (51) is inserted inside the fixed part (50). A sixth spring (52) is fixed between the inner wall of the fixed part (50) and the movable part (51). Multiple scraping needles (53) are fixed on the outer wall of the upper limiting ring (41).

9. A wind turbine blade de-icing device according to claim 6, characterized in that: Two heating rings (54) are fixed on the top surface of the adsorption head (24). A sealing airbag (55) is fixed on the outer side of each heating ring (54). One of the sealing airbags (55) is located inside the other sealing airbag (55). An adjusting pump (56) is fixed on the adsorption head (24). The adjusting pump (56) is connected to the two sealing airbags (55) through pipes.

10. A method for de-icing wind turbine blades, applicable to the wind turbine blade de-icing device described in any one of claims 1 to 9, characterized in that: The de-icing method includes the following steps: Step 1: Start the drone and use its camera to locate a spot on the wind turbine blades that has a smooth, ice-free surface. Step 2: Control the drone to get close to the wind turbine blades so that the first adsorption rod (7) is in close contact with the wind turbine blades and adsorption is performed simultaneously; Step 3: Cancel the magnetic chuck (2) from the fixed frame (1), and control the drone to detach from the magnetic chuck (2) and move away from the wind turbine blades; Step 4: Control the de-icing component to knock and de-ice the wind turbine blades.

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