High-pressure water jet cutting method for retired fan blade

Abstract

The invention provides a retired fan blade high-pressure water jet cutting method which comprises the following steps: hoisting a fan blade, conveying the fan blade to a cutting platform, and clamping the fan blade through a clamping device; the external shaft base and the mechanical arm are started, and the position of the water cutting tool bit is adjusted, so that the water cutting tool bit is aligned to the position to be cut; the water supply unit and the sand supply unit are started, water and sand are conveyed into the water cutting tool bit to be mixed, jet cutting is carried out on the fan blade, the position of the water cutting tool bit is adjusted through the external shaft base and the mechanical arm while cutting is carried out, and segmented cutting is carried out on the fan blade; and after the current segment is cut, the external shaft base and the mechanical arm return to the original position, fragments are cleaned, and the next segment of the fan blade to be cut is moved forwards through the hoisting device. The multi-angle cutting device can perform multi-angle segmented cutting on the retired fan blade, the cutting difficulty is reduced, the cutting efficiency is improved, and no dust is generated.

Description

Technical Field

[0001] This invention relates to the field of decommissioned wind turbine blade recycling technology, and in particular to a high-pressure water jet cutting method for decommissioned wind turbine blades. Background Technology

[0002] The lifespan of wind turbine generators is generally 20-25 years. Abandoned wind turbine generators can be recycled and reused. Recyclable parts include the base, tower, generator components, and turbine blades. However, when recycling turbine blades, due to their large size, they need to be cut. Cutting is typically done using a bladed cutting machine, which generates a large amount of dust and flying debris, requiring significant manpower and resources for cleanup and causing air pollution. While a high-pressure water jet cutting technology is disclosed in related technologies, it has not been applied to wind turbine blade cutting. Furthermore, cutting thick and hard materials like wind turbine blades using only water is very difficult and inefficient. Summary of the Invention

[0003] The purpose of this invention is to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a high-pressure water jet cutting method for decommissioned wind turbine blades, which can perform multi-angle segmented cutting of decommissioned wind turbine blades, reducing cutting difficulty, improving cutting efficiency, and eliminating dust generation.

[0004] This invention provides a high-pressure water jet cutting method for decommissioned wind turbine blades, comprising the following steps: The wind turbine blades are hoisted and transported to the cutting platform, where they are clamped by a clamping device. Start the external shaft base and robotic arm, and adjust the position of the water-cutting head so that it is aligned with the position to be cut; The water supply unit and sand supply unit are started to deliver water and sand to the water cutting head for mixing and spraying them onto the wind turbine blades for cutting. At the same time, the position of the water cutting head is adjusted by the external shaft base and the robotic arm to perform segmented cutting on the wind turbine blades. After the current segment is cut, the external shaft base and the robotic arm are put back into place, the debris is cleared, and the next section of the wind turbine blade to be cut is moved forward using the hoisting device.

[0005] In some embodiments, before water enters the water cutting head, it is first transported from the water storage tank to the filter device for filtration, and then passed into the high-pressure pump. The high-pressure pump performs secondary filtration and passivation on the water before it enters the pressurization area. When the water pressure increases, it is stored in the accumulator for later use. When jet cutting is performed, the switch of the accumulator is turned on, and water flows into the water cutting head.

[0006] In some embodiments, the abrasive is first transported from the abrasive supply tank to the metering abrasive tank before entering the waterjet cutting head. When jet cutting is performed, the switch of the metering abrasive tank is opened, and the abrasive flows into the waterjet cutting head.

[0007] In some embodiments, the sand material is garnet sand with a particle size of 80-120 mesh.

[0008] In some embodiments, the water temperature in the water storage tank is 30~50℃.

[0009] In some embodiments, the maximum jet pressure of the water-cutting head is 420 MPa.

[0010] In some embodiments, the sprayed sand-water mixture is recycled, and the sand is separated from the water and reused.

[0011] In some embodiments, the mass percentage of abrasive material in the waterjet cutting head is 15-25%.

[0012] In some embodiments, the waterjet cutting head uses a pulse jet method for cutting, with a working time to intermittent time ratio of 3:1. Attached Figure Description

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a flowchart of a high-pressure water jet cutting method for decommissioned wind turbine blades according to an embodiment of the present invention. Detailed Implementation

[0014] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0015] The high-pressure water jet cutting method for decommissioned wind turbine blades according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0016] like Figure 1 As shown in the figure, this invention proposes a high-pressure water jet cutting method for decommissioned wind turbine blades, comprising the following steps: S1. Hoist the wind turbine blades and transport them to the cutting platform, where they are clamped using a clamping device. S2. Start the external shaft base and robotic arm, and adjust the position of the water-cutting head so that the water-cutting head is aligned with the position to be cut; S3. Start the water supply unit and sand supply unit to transport water and sand into the water cutting head for mixing and spray cutting onto the wind turbine blades. At the same time, use the external shaft base and robotic arm to adjust the position of the water cutting head to perform segmented cutting on the wind turbine blades. S4. After the current segment is cut, the external shaft base and the robotic arm are put back into place, the debris is cleared, and the next section of the wind turbine blade to be cut is moved forward using the hoisting device.

[0017] The method of this invention can perform multi-angle segmented cutting of decommissioned wind turbine blades, reducing cutting difficulty, improving cutting efficiency, and without generating dust.

[0018] In some embodiments, before water enters the water cutting head, it is first transported from the water storage tank to the filter device for filtration, and then passed into the high-pressure pump. The high-pressure pump performs secondary filtration and passivation on the water before it enters the pressurization area. When the water pressure increases, it is stored in the accumulator for later use. When jet cutting is performed, the switch of the accumulator is turned on, and water flows into the water cutting head.

[0019] In some embodiments, the abrasive is first fed from the abrasive supply tank to the metering tank before entering the waterjet cutting head. When jet cutting begins, the metering tank is opened, and the abrasive flows into the waterjet cutting head. Ensure the sand-to-water ratio meets requirements.

[0020] In some embodiments, the sand material is garnet sand with a particle size of 80-120 mesh.

[0021] In some embodiments, the water temperature in the storage tank is 30~50℃. Heating the water before jetting reduces its viscosity and surface tension, decreases the resistance at the water cutter head, making the jet smoother and more stable. Moreover, the working pressure required for hot water is lower than that required for cold or room temperature water, which reduces the energy consumption of the high-pressure pump and achieves energy saving.

[0022] In some embodiments, the maximum jet pressure of the water-cutting head is 420 MPa.

[0023] In some embodiments, the sprayed sand-water mixture is recycled, and the sand is separated from the water and reused. This can reduce material costs.

[0024] In some embodiments, the mass percentage of abrasive material in the waterjet cutting head is 15-25%. This ratio makes the cutting process smoother.

[0025] In some embodiments, the waterjet cutting head employs a pulsed jet method during cutting, with a working time to interval time ratio of 3:1. Using a pulsed jet method leverages instantaneous high pressure and hydrodynamic effects to achieve higher impact efficiency than continuous jets, while also reducing power consumption.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for high-pressure water jet cutting of decommissioned wind turbine blades, characterized in that, Includes the following steps: The wind turbine blades are hoisted and transported to the cutting platform, where they are clamped by a clamping device. Start the external shaft base and robotic arm, and adjust the position of the water-cutting head so that the water-cutting head is aligned with the position to be cut; The water supply unit and sand supply unit are started to deliver water and sand to the water cutting head for mixing and spraying them onto the wind turbine blades for cutting. At the same time, the position of the water cutting head is adjusted by the external shaft base and the robotic arm to perform segmented cutting on the wind turbine blades. After the current segment is cut, the external shaft base and the robotic arm are put back into place, the debris is cleared, and the next section of the wind turbine blade to be cut is moved forward using the hoisting device.

2. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, Before water enters the water cutting head, it is first transported from the water storage tank to the filter device for filtration, and then passed into the high-pressure pump. The high-pressure pump performs secondary filtration and passivation on the water before it enters the pressurization area. When the water pressure increases, it is stored in the accumulator for later use. When jet cutting is performed, the switch of the accumulator is turned on, and water flows into the water cutting head.

3. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, Before the sand enters the waterjet cutting head, it is first transported from the sand supply tank to the metering sand tank. When jet cutting is performed, the switch of the metering sand tank is opened, and the sand flows into the waterjet cutting head.

4. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, The sand material is garnet sand with a particle size of 80~120 mesh.

5. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 2, characterized in that, The water temperature in the storage tank is 30~50℃.

6. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, The maximum jet pressure of the water-cutting head is 420 MPa.

7. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, The sprayed sand-water mixture is recycled, and the sand and water are separated and reused.

8. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, The mass percentage of sand in the waterjet cutting head is 15-25%.

9. The high-pressure water jet cutting method for decommissioned wind turbine blades according to claim 1, characterized in that, The waterjet cutting head uses a pulse jet method for cutting, with a working time to intermittent time ratio of 3:1.

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