Wind turbine blade coating peeling device

Abstract

The utility model discloses a wind power blade coating peeling device, including compressed gas pipe, high pressure water pipe and baffle cover, including compressed gas pipe and be located in the sandblasting gun and the duster communication of baffle cover inside, sandblasting gun still and sand supply device communication outside baffle cover, high pressure water pipe and be located in the spray head communication of baffle cover inside, compressed gas pipe and high pressure water pipe are respectively equipped with the air valve and water valve for controlling its on-off in baffle cover outside, the sandblasting gun, duster and spray head rotation are connected in baffle cover, and baffle cover outside is equipped with the drive mechanism for driving its rotation, and this device can peel the coating through physical mode and increase the subsequent repair coating adhesion on the blade surface.

Description

Technical Field

[0001] This utility model relates to wind turbine blades, and more particularly to a wind turbine blade coating stripping device. Background Technology

[0002] Wind turbine blades are the core components of wind turbine generators, enabling the conversion of wind energy into mechanical energy. They are mostly made of fiber-reinforced composite materials in one piece. The smoothness of their surface is directly related to wind energy capture efficiency and operational stability. To withstand complex working conditions such as outdoor high and low temperature cycles, ultraviolet radiation, rain erosion, wind and sand abrasion, and salt spray corrosion, the blade surface needs to be coated with a special functional coating system consisting of an adhesion promoting layer, an anti-corrosion and wear-resistant layer, and an anti-aging hydrophobic layer. By strengthening the interface bonding, delaying substrate aging, reducing surface damage, reducing friction, and preventing fouling, the blades ensure structural integrity and operational reliability for long-term service, extend service life, and reduce maintenance costs.

[0003] Currently, wind turbine blades are subjected to multiple harsh conditions during long-term outdoor operation, including strong wind loads, ultraviolet radiation, high and low temperature cycles, rain and snow erosion, and salt spray corrosion. The protective coating on their surface inevitably suffers damage. Therefore, it is necessary to peel off the coating in the damaged area and reapply a new protective coating to achieve repair. However, existing peeling methods mostly use chemical solvents, which are not environmentally friendly and easily cause environmental pollution. Moreover, chemical solvents can easily react with the blade substrate material, causing corrosion damage to the blade surface and affecting the bonding strength of the subsequent repair coating and the structural safety of the blade. To address this, we propose a wind turbine blade coating peeling device. Summary of the Invention

[0004] Purpose of the utility model: The purpose of this utility model is to provide a wind turbine blade coating peeling device that can physically peel off the coating layer and increase the adhesion of the subsequent repair coating to the blade surface.

[0005] Technical solution: The wind turbine blade coating stripping device of this utility model includes a compressed air pipe, a high-pressure water pipe and a baffle. The compressed air pipe is connected to a sandblasting gun and a wind shield inside the baffle. The sandblasting gun is also connected to a sand supply device outside the baffle. The high-pressure water pipe is connected to a nozzle inside the baffle. The compressed air pipe and the high-pressure water pipe are respectively provided with air valves and water valves outside the baffle for controlling the air and water output.

[0006] By installing a sandblasting gun, a wind shield, and a nozzle inside a baffle, and connecting them to compressed air and high-pressure water pipes outside the baffle, and with the sandblasting gun also connected to a sand supply device, the nozzle and sandblasting gun respectively spray high-pressure water and high-speed sand and gravel to impact the surface of the wind turbine blades and peel off the coating. These two components work together to ensure effective and thorough removal of the coating. For example, if high-pressure water cannot find an effective entry point to peel the coating, the sandblasting gun can be used first, followed by further peeling with high-pressure water. The high-speed sand and gravel sprayed by the sandblasting gun also create an uneven structure on the blade surface, providing a larger contact area for subsequent repair coatings, increasing adhesion and improving the bonding strength between the repair coating and the blade. The wind shield sprays high-speed air after each cleaning to remove the peeled coating from the blade surface. The baffle prevents high-pressure water or high-speed sand and gravel from flowing out, ensuring the safety of the peeling process. This device peels the coating using a purely physical method, avoiding the environmental pollution caused by chemical peeling methods.

[0007] Preferably, the compressed air pipe is connected to the sandblasting gun and the air shroud by an independent flexible air supply pipe, and each air supply pipe is equipped with an independent air valve.

[0008] The compressed air pipe is independently connected to the sandblasting gun and the air hood via a ground-level air supply pipe, and is equipped with an independent air valve for independent control of the sandblasting gun and the air hood; the use of a flexible air supply pipe facilitates the rotation of the sandblasting gun and the air hood.

[0009] Preferably, a flexible water supply pipe connects the high-pressure water pipe to the nozzle.

[0010] The high-pressure water pipe is connected to the nozzle via a flexible water pipe to facilitate nozzle rotation.

[0011] Preferably, the sandblasting gun, air shroud, and nozzle are rotatably connected inside the baffle, and a drive device for driving their rotation is provided outside the baffle.

[0012] The sandblasting gun, air hood, and nozzle are rotatably connected inside the baffle and are equipped with corresponding drive mechanisms to rotate them. This allows for better adjustment of the spray angles at the outlets of the equipment. Because different spray angles result in different forces on the blade surface, damage to the blade substrate caused by vertical spraying can be avoided. Furthermore, the force required to peel off the coating varies depending on the degree of damage, thus improving the applicability of this device.

[0013] Preferably, the sandblasting gun, air shroud, and nozzle are all rotatably connected to the baffle via independent rotating shafts. One end of the rotating shaft passes through the baffle and is equipped with a turbine. A worm gear matching the turbine is rotatably connected to the outside of the baffle.

[0014] Preferably, each shaft is equipped with an independent worm gear.

[0015] Each shaft is equipped with an independent worm gear, which can independently control the rotation of the sandblasting gun, air hood, and nozzle. This allows for better control of several devices according to actual needs, improving the overall flexibility of the device.

[0016] Preferably, the sandblasting gun, shroud, and nozzle can be rotated to align the outlet with the same area to be treated on the wind turbine blade.

[0017] After the sandblasting gun, air shroud, and nozzle are rotated, the outlet can be aimed at the same area. This makes it easy to peel off the coating layer in the same area using two different methods: sandblasting and water spraying. Moreover, regardless of the peeling treatment, the air shroud can be aimed at this area to remove the peeled coating layer or residual sand and gravel from the blade surface.

[0018] Preferably, the outlet of the hood is equipped with an electric heating mesh.

[0019] An electric heating grid is installed at the outlet of the fan shroud to blow out hot air, which accelerates the evaporation of residual moisture on the blade surface.

[0020] Beneficial effects: By installing a sandblasting gun, air hood, and nozzle in the baffle and connecting them to a compressed air pipe or high-pressure water pipe, it can spray high-speed sand, high-pressure air, and high-pressure water, which can physically peel off the coating layer on the blade surface and remove the peeled coating layer, making it environmentally friendly and pollution-free; secondly, the above equipment can be rotated through the drive mechanism, which can more flexibly adapt to different blades, avoiding damage to the blades and more effectively peeling off the coating layer. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the compressed air pipe of this utility model; Figure 3 This is a partial three-dimensional structural diagram of the high-pressure water pipe of this utility model; Figure 4 This is a partial three-dimensional cross-sectional view of the wind shield of this utility model.

[0022] The following are the labels in the attached diagram: 1. Compressed air pipe, 2. High-pressure water pipe, 3. Baffle, 4. Sandblasting gun, 5. Air hood, 6. Sand supply device, 7. Nozzle, 8. Air valve, 9. Water valve, 10. Air supply pipe, 11. Water supply pipe, 12. Shaft, 13. Turbine, 14. Worm gear, 15. Electric heating grid, 16. Handwheel. Detailed Implementation

[0023] As shown in the figure, the wind turbine blade coating stripping device of this utility model includes a compressed air pipe 1, a high-pressure water pipe 2, and a baffle 3. The compressed air pipe 1 is connected to a sandblasting gun 4 and a wind shield 5 located inside the baffle 3. The sandblasting gun 4 is also connected to a sand supply device 6 outside the baffle 3. The high-pressure water pipe 2 is connected to a nozzle 7 located inside the baffle 3. The compressed air pipe 1 and the high-pressure water pipe 2 are respectively provided with an air valve 8 and a water valve 9 outside the baffle 3 for controlling their on / off state.

[0024] The compressed air pipe 1 has two ports at its bottom, each connected to an air valve 8. Each air valve 8 is connected to an independent air supply pipe 10. The two air supply pipes 10 pass through the baffle 3 and are respectively connected to the sandblasting gun 4 and the air shroud 5 located inside it, providing them with a high-pressure air source. The two air valves 8 independently control the air supply to the sandblasting gun 4 and the air shroud 5. The sandblasting gun 4 is also connected to a sand supply device 6 located outside the baffle 3. The sand supply device 6 can be a sand bottle filled with gravel. An electric heating grid 15 can also be installed at the outlet of the air shroud 5 to dry the blade surface.

[0025] The bottom end of the high-pressure water pipe 2 is connected to a water valve 9, and the water valve 9 is connected to a water supply pipe 11. The water supply pipe 11 passes through the baffle 3 and connects to the nozzle 7 located inside it to provide a high-pressure water source.

[0026] The shield 3 can be made of transparent material to facilitate observation of the internal peeling. The shield 3 can be a rectangular frame as in this embodiment, or it can be other shapes, as long as it can cover the blade surface to form a relatively closed space. After peeling is completed, the shield 3 can be raised appropriately to create a gap between it and the blade surface. At this time, the wind shield 5 blows air onto the blade surface, which can blow away the sand, water or peeled coating layer remaining on the blade surface.

[0027] The sandblasting gun 4, the air cover 5, and the nozzle 7 are all rotatably connected to the baffle 3 via an independent rotating shaft 12. One end of the rotating shaft 12 passes through the baffle 3 and is equipped with a turbine 13. A worm gear 14 that matches the turbine 13 is rotatably connected to the outside of the baffle 3. The turbine 13 at the end of the rotating shaft 12 and the worm gear 14 that matches it on the baffle 3 are equivalent to the drive mechanism that drives the rotating shaft 12 to rotate.

[0028] The three turbines 13 can share a single worm gear 14 for unified drive rotation, or each turbine 13 can have an independent worm gear 14, allowing the sandblasting gun 4, air shroud 5, and nozzle 7 to rotate independently, making them more flexible in use. A handwheel 16 can be connected to the end of the worm gear 14 for easy rotation, or it can be directly connected to a motor.

[0029] If each turbine 13 is equipped with an independent worm gear 14, the sandblasting gun 4, the wind shield 5, and the nozzle 7 can be aligned with the same area to be treated on the wind turbine blade by rotating without moving the baffle 3. If the turbine 13 is not equipped with an independent worm gear 14, the outlets of different devices can also be aligned with the same area to be treated on the wind turbine blade by moving the baffle 3 (which is actually moving the entire device) and cooperating with the rotation of the corresponding equipment.

[0030] In operation, the high-pressure water pipe 2 delivers high-pressure water to the nozzle 7, using the high-pressure water jet to peel off the damaged coating on the wind turbine blade surface. Compressed air is then blown out through the shroud 5 to remove any remaining coating debris from the blade surface. Next, a high-speed airflow of sand and gravel is sprayed through the sandblasting gun 4 to thoroughly remove any remaining coating and create a micro-textured structure on the blade surface, enhancing the bonding strength of any subsequent repair coating. Finally, compressed air from the shroud 5 completely removes any remaining sand and coating debris from the blade surface. If the high-pressure water jet cannot find a point of contact between the coating and the blade and cannot effectively peel off the coating, the original coating can be damaged first by spraying high-speed sand and gravel through the sandblasting gun 4, and then the coating can be peeled off by the high-pressure water jet. The outlet direction of the sandblasting gun 4, shroud 5, and nozzle 7 can also be adjusted according to actual needs during use.

Claims

1. A wind turbine blade coating stripping device, comprising a compressed air pipe (1), a high-pressure water pipe (2), and a baffle (3), characterized in that: The compressed air pipe (1) is connected to the sandblasting gun (4) and the air hood (5) located inside the baffle (3). The sandblasting gun (4) is also connected to the sand supply device (6) outside the baffle (3). The high-pressure water pipe (2) is connected to the nozzle (7) located inside the baffle (3). The compressed air pipe (1) and the high-pressure water pipe (2) are respectively equipped with air valve (8) and water valve (9) outside the baffle (3) for controlling their on and off.

2. The apparatus according to claim 1, characterized in that: The compressed air pipe (1) is connected to the sandblasting gun (4) and the wind hood (5) by an independent flexible air supply pipe (10), and each air supply pipe (10) is equipped with an independent air valve (8).

3. The apparatus according to claim 1, characterized in that: A flexible water supply pipe (11) connects the high-pressure water pipe (2) to the nozzle (7).

4. The apparatus according to claim 1, characterized in that: The sandblasting gun (4), the air shroud (5) and the nozzle (7) are rotatably connected inside the baffle (3), and a drive mechanism for driving its rotation is provided outside the baffle (3).

5. The apparatus according to claim 4, characterized in that: The sandblasting gun (4), the wind shield (5) and the nozzle (7) are all rotatably connected to the baffle (3) through an independent rotating shaft (12). One end of the rotating shaft (12) passes through the baffle (3) and is equipped with a turbine (13). A worm gear (14) that matches the turbine (13) is rotatably connected to the outside of the baffle (3).

6. The apparatus according to claim 5, characterized in that: Each shaft (12) is equipped with an independent worm gear (14).

7. The apparatus according to claim 6, characterized in that: The sandblasting gun (4), the shroud (5), and the nozzle (7) can be rotated to align the outlet with the same area to be treated on the wind turbine blade.

8. The apparatus according to claim 1, characterized in that: The outlet of the hood (5) is equipped with an electric heating network (15).

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