A wind turbine blade de-icing device

Abstract

This invention relates to the field of blade de-icing technology and discloses a wind turbine blade de-icing device, comprising a de-icing unit consisting of a positioning mechanism and a roller de-icing mechanism. The positioning mechanism is used to position and engage with the inner end of the blade. The positioning mechanism includes a power cord winding device, with a power cord wound and connected internally. The roller de-icing mechanism includes a fixed frame and a power supply plate. A movable rod is rotatably connected inside the fixed frame. A main moving wheel is fixed in the middle of the movable rod, and auxiliary wheels are fixed at both ends of the movable rod. The power supply plate is fixed to the inner end of the fixed frame, and the power cord is electrically fixedly connected to the power supply plate. This invention allows the positioning mechanism to be accurately installed at the blade root, and then the roller de-icing mechanism is connected to the positioning mechanism. The roller de-icing mechanism is responsible for reciprocating movement on the outside of the blade to perform de-icing operations, which can better adapt to the curved shape of the blade and improve the uniformity and thoroughness of de-icing.

Description

Technical Field

[0001] This invention relates to the field of blade de-icing technology, specifically to a de-icing device for wind turbine blades. Background Technology

[0002] When wind turbines operate in cold environments, the blades are prone to icing, which not only affects power generation efficiency but may also damage the blade structure and even cause safety accidents.

[0003] Existing wind turbine blade de-icing devices are cumbersome to install and disassemble, requiring significant time and manpower. The installation process is complex, difficult to adapt to the roots of blades of different shapes and sizes, and prone to swaying and displacement during operation. The power cords used for power supply cannot be automatically wound, easily becoming tangled during reciprocating de-icing operations, increasing manual workload. The de-icing mechanism has poor stability, struggles to adapt to the curved shape of the blades, and lacks uniformity and thoroughness in de-icing. Furthermore, the de-icing method is limited, resulting in low efficiency when dealing with thick ice layers and a tendency for ice residue to remain. Therefore, a corresponding technical solution needs to be designed to address these issues. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a de-icing device for wind turbine blades, solving its technical problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a wind turbine blade de-icing device, comprising a de-icing device, the de-icing device being composed of a positioning mechanism and a roller de-icing mechanism, the positioning mechanism being used for positioning and engaging with the inner end of the blade, the positioning mechanism including a power cord winding device, the power cord winding device having a power cord wound and connected inside, the power cord winding device being able to automatically wind up the power cord; The roller de-icing mechanism includes a fixed frame and a power supply board. A movable rod is rotatably connected inside the fixed frame. A movable main wheel is fixedly mounted in the middle of the movable rod, and auxiliary wheels are fixedly mounted at both ends of the movable rod. The movable main wheel and auxiliary wheels move above the blades. The movable main wheel moves above the blades, and the auxiliary wheels assist in the roller movement on the side above the blades. The power supply board is fixed to the inner end of the fixed frame, and a power supply line is electrically fixedly connected to the power supply board. The power supply line is used to supply power to the power supply board, thereby supplying power to drive and heat the de-icing mechanism.

[0006] Preferably, the positioning mechanism includes a first retaining ring, a second retaining ring, an electric telescopic device, a clamping head, and a limiting cylinder. Both the first retaining ring and the second retaining ring are semi-circular structures and both ends are fixed with extension plates. The extension plates are installed together by bolts. The two ends of the first retaining ring are electrically connected to power leads, and the two ends of the second retaining ring are electrically connected to power slots. The semi-annular retaining rings one and two are connected to the blade root by bolts through an extension plate, and the power leads at both ends are plugged into the power slots for power supply.

[0007] Preferably, the outer end of the second retaining ring is electrically connected to a power supply mounting port, and the power cord winding device is fixed to the outer end of the first retaining ring; The power installation port is used to connect an external power supply harness to supply power to the de-icing device.

[0008] Preferably, the electric telescopic device is fixedly distributed on the outer side walls of the first and second retaining rings, the limiting cylinder is fixedly distributed on the inner side walls of the first and second retaining rings, the output end of the electric telescopic device is connected through a telescopic rod, and the clamping head is fixedly disposed on the inner end of the telescopic rod. Multiple sets of ring-shaped electric telescopic devices are used to automatically control the telescopic rod to extend and retract, adjusting the position of the clamping head, thereby ensuring that the clamping head is locked to the outside of the blade and remains stable.

[0009] Preferably, a support plate is fixedly provided on one side of the fixed frame, a drive motor is provided on the outer end of the support plate, and the inner end of the drive motor is connected through the movable rod. An adapter rod is electrically connected between the drive motor and the power board; The adapter rod is used to supply power from the power board to the drive motor, thereby driving the motor to rotate the control rod, which in turn drives the main moving wheel and the auxiliary wheel to reciprocate.

[0010] Preferably, metal flexible tubes are fixedly provided on both the front and rear ends of the fixed frame, crossbars are fixedly distributed between the metal flexible tubes, support flexible rods are fixedly distributed on the inner ends of the metal flexible tubes, sliding ball bearings are fixedly provided on the inner ends of the support flexible rods, and a magnetic ball is fixedly provided on the lower end of the metal flexible tubes. The metal hose is a flexible and adjustable type. It hangs down through the magnetic ball and is magnetically attracted to the whole unit, which makes the movement stable. At the same time, multiple sets of support soft rods fix the sliding ball inward to make the roller de-icing mechanism more stable and close to the outer wall of the blade. The crossbar is used to firmly support the metal hose at the front and rear ends.

[0011] Preferably, a connecting plate is fixed to the outer end of the fixed frame, an end plate is fixed to the outer end of the connecting plate, a fixing rod is fixed between the inner ends of the end plate and the fixed frame, an electric heating flexible plate is movably connected to the outside of the fixing rod, and metal bristles are fixedly distributed in an array on the inner sidewall of the electric heating flexible plate. The upper end of the electric heating flexible plate is located outside the fixed rod and can be adjusted. The electric heating flexible plate is located on the outer wall of the blade and moves to heat and de-ic. The metal bristles are fixedly distributed in an array to brush the outside of the blade with high intensity, further enhancing the de-icing operation.

[0012] Preferably, a connecting rope is fixed to the bottom of each of the electric heating flexible plates, and a magnetic ball is fixed to the bottom of the connecting rope. A connecting rod is fixed between the upper end of the connecting plate and the power board. The connecting rope is used to pull the flexible heating plate downwards and attach it to the magnetic ball two, keeping the flexible heating plates at both ends in contact with the outer wall of the blade, so as to improve the de-icing effect. The adapter rod two is used to supply power from the power board to the connecting plate and then to the flexible heating plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The de-icing device, composed of a positioning mechanism and a roller de-icing mechanism, has a modular design that makes the installation and disassembly of the device more convenient. During installation, the positioning mechanism can be accurately installed at the root of the blade first, and then the roller de-icing mechanism can be connected to the positioning mechanism. The whole process is simple and quick, reducing installation time and labor costs.

[0014] The positioning mechanism is used to lock the de-icing device to the root of the blade, ensuring that the device will not shake or shift during operation. The roller de-icing mechanism is responsible for reciprocating movement outside the blade to perform de-icing operations. The design of separating the positioning and de-icing functions improves the working stability and reliability of the device.

[0015] The semi-circular retaining rings one and two can closely fit the shape of the blade root, achieving precise positioning. The extension plates at both ends are installed by bolts, making the installation process simple and convenient. This ensures a firm and reliable connection between the retaining rings and the blade, better adapting to blade roots of different shapes and sizes, and improving the versatility of the device.

[0016] It connects to the power socket via a power connector, avoiding problems such as loosening and short circuits that may occur with traditional wire connections, thus improving the safety and reliability of power supply. At the same time, the plug-in power supply method also facilitates the installation and disassembly of the device, making operation simple and quick.

[0017] The power cord is wound and connected by a power cord winding device set at one outer end of the retaining ring. The power cord can be automatically wound up. During reciprocating operation, the power cord can be easily released or retracted from the power cord winding device to provide power to the device. This avoids the messy tangling of the power cord. The automatic winding function is more convenient and faster, and reduces the workload of manual operation.

[0018] Multiple sets of ring-shaped electric telescopic devices can automatically control the telescopic rod to extend and retract, adjusting the position of the clamping head. This ensures that the clamping head is locked to the outside of the blade and remains stable. The automated clamping and locking method not only improves the installation efficiency of the device, but also automatically adjusts the clamping force according to the actual size and shape of the blade, ensuring the firmness and stability of the clamping and reducing the impact of human factors on the clamping effect.

[0019] (2) The main moving wheel and the auxiliary wheel are rotatably connected inside the fixed frame of the roller de-icing mechanism. The main moving wheel plays a role in moving and supporting above the blade, while the auxiliary wheel is located on the side above the blade to assist in the roller movement. This can increase the contact area between the device and the blade, improve the stability of movement and the efficiency of de-icing. During operation, the drive motor drives the movable rod to rotate, which drives the main moving wheel and the auxiliary wheel to reciprocate and roll, thereby achieving comprehensive de-icing of the blade surface. The coordinated operation of the main moving wheel and the auxiliary wheel can better adapt to the curved shape of the blade and improve the uniformity and thoroughness of de-icing.

[0020] Two sets of flexible and adjustable metal hoses fixed at the front and rear ends on both sides of the fixed frame can be flexibly adjusted according to the shape of the blade and the needs of de-icing. After the magnetic ball hangs down and is magnetically attracted to the whole, the movement remains stable. At the same time, multiple sets of supporting soft rods fix the sliding ball inward, so that the roller de-icing mechanism supported on the outer wall of the blade is more stable and fits better. It can better adapt to blades of different shapes and sizes, improving the versatility and de-icing effect of the device.

[0021] The electric heating flexible plate is externally connected to the fixed rods at both ends, and the metal bristles are fixedly distributed in an array on its inner side wall. The electric heating flexible plate is located on the outer side wall of the blade and moves to heat and de-ice, which can quickly melt the ice layer on the blade surface. The metal bristles are fixedly distributed in an array to brush the outside of the blade with high intensity, further enhancing the de-icing operation. The de-icing method that combines heating and brushing can greatly improve the efficiency and effect of de-icing, especially when dealing with thick ice layers. It has obvious advantages, can more thoroughly remove the ice layer on the blade surface, and reduce the impact of ice residue on the blade.

[0022] Furthermore, by using connecting ropes and magnetic balls fixed at the bottom of the flexible heating plate, the flexible heating plate is stretched downwards and attracted to the blade by the magnetic balls, keeping both ends of the flexible heating plate in contact with the outer wall of the blade. This results in better de-icing effect, ensuring a tight fit to the blade surface and guaranteeing effective heating and brushing. It also improves the stability and reliability of de-icing, reduces incomplete de-icing caused by separation of the flexible heating plate from the blade surface, and provides strong protection for the safe operation of wind turbines, with broad market application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the de-icing device of the present invention installed on the external structure of a wind turbine blade; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the structure of the de-icing device of the present invention after partial blades are installed; Figure 4 This is a schematic diagram of the overall structure of the de-icing device of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the positioning mechanism of the present invention; Figure 6 This is a partial structural diagram of the positioning mechanism of the present invention; Figure 7 This is a schematic diagram of the roller de-icing mechanism of the present invention from an upper view. Figure 8 This is a schematic diagram of the roller de-icing mechanism of the present invention from another perspective. Figure 9 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 10 For the present invention Figure 8 Enlarged structural diagram at point C.

[0024] In the picture: 1. De-icing device; 11. Positioning mechanism; 111. Clamping ring one; 112. Clamping ring two; 1121. Power installation port; 113. Extension plate; 114. Power cord winding device; 1141. Power cord; 115. Electric telescopic device; 1151. Telescopic rod; 1152. Clamping head; 116. Limiting cylinder; 117. Power guide head; 118. Power slot; 12. Roller-driven de-icing mechanism; 121. Fixed frame; 1211. Movable rod; 1212. Support plate; 1213. Drive motor; 122. Metal flexible hose; 1221. Crossbar; 1222. Supporting flexible rod; 1223. Sliding ball; 1224. Magnetic ball one; 123. Electric heating flexible plate; 1231. Metal bristles; 1232. Connecting rope; 1233. Magnetic ball two; 124. Power board; 1241. Adapter rod one; 1242. Adapter rod two; 125. Moving main wheel; 126. Auxiliary wheel; 127. Connecting plate; 1271. End plate; 1272. Fixed rod. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-10The present invention provides a technical solution: a wind turbine blade de-icing device, including a de-icing device 1, which is composed of a positioning mechanism 11 and a roller de-icing mechanism 12. The positioning mechanism 11 is used to position and snap onto the outer side of the inner end of the blade. The positioning mechanism 11 includes a power cord winding device 114, and a power cord 1141 is wound and connected inside the power cord winding device 114. The power cord winding device 114 can automatically wind up the power cord 1141. The roller de-icing mechanism 12 includes a fixed frame 121 and a power board 124. A movable rod 1211 is rotatably connected inside the fixed frame 121. A movable main wheel 125 is fixed in the middle of the movable rod 1211, and auxiliary wheels 126 are fixed at both ends of the movable rod 1211. The movable main wheel 125 and the auxiliary wheels 126 move above the blades. The movable main wheel 125 moves above the blades, and the auxiliary wheels 126 assist in the roller movement on the side above the blades. The power board 124 is fixed to the inner end of the fixed frame 121. A power cord 1141 is electrically fixedly connected to the power board 124. The power cord 1141 is used to supply power to the power board 124, thereby supplying power for driving and heating de-icing.

[0027] The de-icing device 1 is locked to the root of the blade by the positioning mechanism 11, and then the de-icing operation is performed by the roller de-icing mechanism 12 reciprocating outside the blade.

[0028] In a further improvement, the positioning mechanism 11 includes a first retaining ring 111, a second retaining ring 112, an electric telescopic device 115, a clamping head 1152, and a limiting cylinder 116. Both the first retaining ring 111 and the second retaining ring 112 are semi-circular structures and both ends are fixed with extension plates 113. The extension plates 113 are installed together by bolts. The two ends of the first retaining ring 111 are electrically connected to power leads 117, and the two ends of the second retaining ring 112 are electrically connected to power slots 118. The semi-annular retaining ring 111 and retaining ring 112 are bolted together and installed to the root of the blade via an extension plate 113. The power leads 117 at both ends are plugged into the power slots 118 for power supply.

[0029] In a further improvement, the outer end of the second retainer 112 is electrically connected to a power installation port 1121, and the power cord winding device 114 is fixed to the outer end of the first retainer 111. The power installation port 1121 is used to connect an external power supply harness to supply power to the de-icing device 1.

[0030] In a further improvement, the electric telescopic device 115 is fixedly distributed on the outer side wall of the first retaining ring 111 and the second retaining ring 112, the limiting cylinder 116 is fixedly distributed on the inner side wall of the first retaining ring 111 and the second retaining ring 112, the output end of the electric telescopic device 115 is connected through the telescopic rod 1151, and the clamping head 1152 is fixedly disposed on the inner end of the telescopic rod 1151. Multiple sets of annularly distributed electric telescopic devices 115 are used to automatically control the telescopic rod 1151 to extend and retract, adjusting the position of the clamping head 1152, thereby ensuring that the clamping head 1152 clamps and locks to the outside of the blade to maintain stability.

[0031] In a further improvement, a support plate 1212 is fixedly provided on one side of the fixed frame 121, and a drive motor 1213 is provided on the outer end of the support plate 1212. The inner end of the drive motor 1213 is connected through to the movable rod 1211. An adapter rod 1241 is electrically connected between the drive motor 1213 and the power board 124; The adapter rod 1241 is used to supply power from the power board 124 to the drive motor 1213, thereby driving the motor 1213 to drive the control lever 1211 to rotate, which in turn drives the moving main wheel 125 and the auxiliary wheel 126 to reciprocate.

[0032] Further improvements include the following: metal flexible tubes 122 are fixedly installed on both sides of the fixed frame 121 at the front and rear ends; crossbars 1221 are fixedly distributed between the metal flexible tubes 122; support flexible rods 1222 are fixedly distributed at the inner ends of the metal flexible tubes 122; sliding ball bearings 1223 are fixedly installed at the inner ends of the support flexible rods 1222; and magnetic ball bearings 1224 are fixedly installed at the lower end of the metal flexible tubes 122. The metal hose 122 is a bendable and adjustable hose. It hangs down through the magnetic ball 1224 and is magnetically attracted to the whole unit, so that the movement remains stable. At the same time, multiple sets of support soft rods 1222 fix the sliding ball 1223 inward to make the roller de-icing mechanism 12 more stable and close to the outer wall of the blade. The crossbar 1221 is used to firmly support the metal hose 122 at the front and rear ends.

[0033] Further improvements include a connecting plate 127 fixed to the outer end of the fixed frame 121, an end plate 1271 fixed to the outer end of the connecting plate 127, a fixing rod 1272 fixed between the inner ends of the end plate 1271 and the fixed frame 121, an electric heating flexible plate 123 movably connected to the outside of the fixing rod 1272, and metal bristles 1231 fixedly distributed in an array on the inner sidewall of the electric heating flexible plate 123. The upper end of the electric heating flexible plate 123 is located outside the fixed rod 1272 and can be adjusted. The electric heating flexible plate 123 is located on the outer wall of the blade and moves to heat and de-ic. The metal bristles 1231, which are fixedly distributed in an array, are used to brush the outside of the blade with high intensity to further enhance the de-icing operation.

[0034] Specifically, the bottom of the electric heating flexible plate 123 is fixed with a connecting rope 1232, the bottom of the connecting rope 1232 is fixed with a magnetic ball 1233, and the upper end of the connecting plate 127 is fixed with a connecting rod 1242. The connecting rope 1232 is used to pull the electric heating flexible plate 123 downward and attach it to the magnetic ball 1233 to keep the electric heating flexible plates 123 at both ends attached to the outer wall of the blade, so as to improve the de-icing effect. The adapter rod 1242 is used to supply power from the power board 124 to the connecting plate 127 and transmit it to the electric heating flexible plate 123.

[0035] Working principle: Installation of positioning mechanism 11 The semi-annular retaining ring 111 and retaining ring 112 are bolted together and installed to the root of the blade through the extension plate 113, so that the power leads 117 at both ends are inserted into the power slot 118 to achieve power supply connection. Power is supplied to the de-icing device 1 by connecting an external power harness through the power installation port 1121; Multiple sets of annularly distributed electric telescopic devices 115 are activated. The telescopic rod 1151 at the output end drives the clamping head 1152 to extend and retract to adjust its position, so that the clamping head 1152 clamps and locks to the outside of the blade. At the same time, the limiting cylinder 116 assists in positioning to ensure that the positioning mechanism 11 is stably locked at the root of the blade.

[0036] Connecting roller de-icing mechanism 12: Connect the roller de-icing mechanism 12 to the positioning mechanism 11, pull out the power cord 1141 from the output end of the power cord winding device 114, and electrically fix it to the power board 124 in the roller de-icing mechanism 12 to provide power for subsequent driving and heating de-icing. According to the shape of the blade and the de-icing requirements, the flexible metal hose 122 is bent and adjusted so that it hangs down through the magnetic ball 1224 and is magnetically attracted to the whole unit to maintain stable movement; at the same time, multiple sets of supporting soft rods 1222 with sliding ball 1223 fixed to the inner end support the outer wall of the blade, so that the roller de-icing mechanism 12 is more stable and fits the blade movement; the crossbar 1221 firmly supports the front and rear ends of the flexible metal hose 122. Adjust the position of the electric heating flexible plate 123 outside the fixed rod 1272 so that it is located on both sides of the blade. Pull the electric heating flexible plate 123 downward through the connecting rope 1232 fixed at the bottom of the electric heating flexible plate 123, and use the magnetic ball 1233 to attract it to one piece, keeping the electric heating flexible plate 123 at both ends attached to the outer wall of the blade. When the drive motor 1213 is started, the power board 124 supplies power to the drive motor 1213 through the adapter rod 1241. The drive motor 1213 drives the control rod 1211 to rotate, which drives the main moving wheel 125 and the auxiliary wheel 126 to reciprocate, so that the roller de-icing mechanism 12 reciprocates outside the blade. The power board 124 supplies power to the connecting plate 127 via the adapter rod 1242, and then transmits it to the electric heating flexible plate 123. The electric heating flexible plate 123 heats and de-ices the blade as it moves along the outer wall of the blade, causing the ice layer on the blade surface to melt rapidly. At the same time, the metal bristles 1231, which are fixedly distributed in an array on the inner wall of the electric heating flexible plate 123, brush the outside of the blade at high intensity, further enhancing the de-icing operation.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended technical solutions rather than the foregoing description, and thus all changes falling within the meaning and scope of equivalent elements of the technical solutions are intended to be included within the present invention.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A de-icing device for wind turbine blades, comprising a de-icing device (1), characterized in that: The de-icing device (1) consists of a positioning mechanism (11) and a roller de-icing mechanism (12). The positioning mechanism (11) is used to position and snap onto the inner end of the blade. The positioning mechanism (11) includes a power cord winding device (114), and the power cord winding device (114) has a power cord (1141) wound inside. The roller de-icing mechanism (12) includes a fixed frame (121) and a power board (124). The fixed frame (121) is rotatably connected to a movable rod (1211). A movable main wheel (125) is fixed in the middle of the movable rod (1211), and auxiliary wheels (126) are fixed at both ends of the movable rod (1211). The movable main wheel (125) and the auxiliary wheels (126) move above the blade. The power board (124) is fixed to the inner end of the fixed frame (121), and the power cord (1141) is electrically fixedly connected to the power board (124).

2. The de-icing device for wind turbine blades according to claim 1, characterized in that: The positioning mechanism (11) includes a first retaining ring (111), a second retaining ring (112), an electric telescopic device (115), a clamping head (1152), and a limiting cylinder (116). The first retaining ring (111) and the second retaining ring (112) are both semi-circular structures and both ends are fixed with extension plates (113). The extension plates (113) are installed together by bolts. The two ends of the first retaining ring (111) are electrically connected to a power supply head (117), and the two ends of the second retaining ring (112) are electrically connected to a power supply slot (118).

3. The de-icing device for wind turbine blades according to claim 2, characterized in that: The outer end of the second retaining ring (112) is electrically connected to a power installation port (1121), and the power cord winding device (114) is fixed to the outer end of the first retaining ring (111).

4. The de-icing device for wind turbine blades according to claim 3, characterized in that: The electric telescopic device (115) is fixedly distributed on the outer side walls of the first retaining ring (111) and the second retaining ring (112), and the limiting cylinder (116) is fixedly distributed on the inner side walls of the first retaining ring (111) and the second retaining ring (112). The output end of the electric telescopic device (115) is connected to the telescopic rod (1151), and the clamping head (1152) is fixedly installed on the inner end of the telescopic rod (1151).

5. A wind turbine blade de-icing device according to claim 1, characterized in that: A support plate (1212) is fixedly provided on one side of the fixed frame (121), and a drive motor (1213) is provided on the outer end of the support plate (1212). The inner end of the drive motor (1213) is connected through the movable rod (1211). The drive motor (1213) is electrically connected to the power board (124) by an adapter rod (1241).

6. A wind turbine blade de-icing device according to claim 5, characterized in that: Metal flexible tubes (122) are fixedly provided on both sides of the fixed frame (121) at the front and rear ends. A crossbar (1221) is fixedly distributed between the metal flexible tubes (122). A support flexible rod (1222) is fixedly distributed at the inner end of the metal flexible tube (122). A sliding ball (1223) is fixedly provided at the inner end of the support flexible rod (1222). A magnetic ball (1224) is fixedly provided at the lower end of the metal flexible tube (122).

7. A wind turbine blade de-icing device according to claim 6, characterized in that: A connecting plate (127) is fixed to the outer end of the fixed frame (121), and an end plate (1271) is fixed to the outer end of the connecting plate (127). A fixing rod (1272) is fixed between the inner ends of the end plate (1271) and the fixed frame (121). An electric heating flexible plate (123) is movably connected to the outside of the fixing rod (1272). Metal bristles (1231) are fixedly distributed in an array on the inner sidewall of the electric heating flexible plate (123).

8. A wind turbine blade de-icing device according to claim 7, characterized in that: The bottom of each of the electric heating flexible plates (123) is fixed with a connecting rope (1232), and the bottom of the connecting rope (1232) is fixed with a magnetic ball (1233). The upper end of the connecting plate (127) is fixed with a converter rod (1242) between it and the power supply plate (124).

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