Wave power plant and method of installing the same

Abstract

The application relates to a wave power generation device and a mounting method thereof. The wave power generation device is mounted on a sea wind power foundation; the wave power generation device comprises a floating assembly, a piston assembly, a supporting assembly and a hydraulic power generation assembly; the floating assembly floats on the sea surface and forms a closed space with the sea surface, and the floating assembly is sleeved on the outside of the sea wind power foundation in a slidable manner; the piston assembly comprises a piston rod and a piston connected with each other, the piston rod is supported on the floating assembly through the supporting assembly, and the piston is arranged in a lower inner cavity in a slidable manner, so that the lower inner cavity is sequentially divided into a first chamber and a second chamber from top to bottom, wherein the first chamber is separated from the second chamber when the piston slides upwards, and the first chamber communicates with the second chamber when the piston slides downwards; the hydraulic power generation assembly is arranged on the sea wind power foundation, a liquid inlet of the hydraulic power generation assembly communicates with the first chamber through a water inlet pipe, and a liquid outlet of the hydraulic power generation assembly communicates with the second chamber through a water outlet pipe.

Description

Technical Field

[0001] This application relates to the field of new energy power generation technology, and in particular to a wave power generation device and its installation method. Background Technology

[0002] Offshore wind power, as a crucial clean energy source, is a vital strategic support for the nation's energy transition. Offshore wind turbines consist of turbine units, towers, and foundations. The offshore wind farm foundation is a key component in the design, construction, and operation and maintenance of offshore wind farms. During turbine operation, the foundation bears cyclic loads coupled from turbine loads, wave loads, water flow loads, sea ice loads, and seismic forces, with the turbine load being particularly significant. Therefore, when the service life of an offshore wind farm foundation reaches its designed lifespan (e.g., 25 years), it needs to be dismantled. However, dismantling offshore wind farm foundations is difficult and increases the cost of the offshore wind farm. Summary of the Invention

[0003] Therefore, it is necessary to provide a wave power generation device and its installation method to address the aforementioned technical problems.

[0004] A wave power generation device is installed on an offshore wind power foundation, wherein a partition is provided inside the offshore wind power foundation to divide the inner cavity of the offshore wind power foundation into an upper inner cavity and a lower inner cavity that are separated from top to bottom.

[0005] The wave power generation device includes: a floating component, a piston component, a support component, and a hydroelectric power generation component;

[0006] The floating component floats on the sea surface and forms a closed space between itself and the sea surface. The floating component can be slidably fitted onto the outside of the offshore wind power foundation.

[0007] The piston assembly includes a connected piston rod and a piston. The piston rod is supported on the floating assembly by the support assembly. The piston is slidably disposed in the lower inner cavity to divide the lower inner cavity into a first chamber and a second chamber from top to bottom. When the piston slides upward, the first chamber and the second chamber are separated, and when the piston slides downward, the first chamber and the second chamber are connected.

[0008] The hydroelectric power generation component is installed on the offshore wind power foundation. The liquid inlet of the hydroelectric power generation component is connected to the first chamber through a water inlet pipe, and the liquid outlet of the hydroelectric power generation component is connected to the second chamber through a drain pipe.

[0009] In one embodiment, the floating component includes a sliding sleeve and a floating body;

[0010] The sliding sleeve can be slidably fitted onto the outside of the offshore wind power foundation;

[0011] The floating body includes an end cap and an annular body. The end cap surrounds the sliding sleeve and is located at the upper end port of the annular body. The support component is located on the end cap.

[0012] In one embodiment, the floating component further includes a reinforcing member connected to the outer peripheral surface of the sliding sleeve and the upper surface of the end cap, and the support component is connected to the reinforcing member.

[0013] In one embodiment, the reinforcement includes a plurality of reinforcing ribs spaced circumferentially along the sliding sleeve;

[0014] The reinforcing rib is in the shape of a right triangle, wherein one right-angled side of the reinforcing rib is connected to the sliding sleeve, the other right-angled side of the reinforcing rib is connected to the end cap, and the inclined surface of the reinforcing rib is connected to the support assembly.

[0015] In one embodiment, the reinforcing rib has a hollowed-out area.

[0016] In one embodiment, the support assembly includes a plurality of support rods, the upper ends of which are located in the upper inner cavity and intersect each other, and the lower ends of which are spaced apart along the circumference of the offshore wind power foundation and connected to the floating assembly.

[0017] The upper end of the piston rod is connected to the intersection of the plurality of support rods.

[0018] In one embodiment, the piston is a downwardly convex arc-shaped gasket.

[0019] In one embodiment, the lower end of the water inlet pipe passes through the upper inner cavity and communicates with the partition.

[0020] In one embodiment, the lower end of the drain pipe is sealed in sequence through the partition and the piston and extends into the second chamber.

[0021] A method for installing a wave power generation device, the method comprising:

[0022] The wind turbine head and tower of the offshore wind power generation device are removed from the decommissioned offshore wind power foundation, wherein the offshore wind power foundation is equipped with a partition to divide the inner cavity of the offshore wind power foundation into an upper inner cavity and a lower inner cavity that are separated from top to bottom.

[0023] The floating component is slidably fitted onto the outside of the offshore wind power foundation and placed on the sea surface to form a sealed space between the floating component and the sea surface.

[0024] The piston rod of the piston assembly is supported on the floating assembly by a support component, and the piston of the piston assembly is slidably disposed in the lower inner cavity, so that the lower inner cavity is divided into a first chamber and a second chamber from top to bottom. When the piston slides upward, the first chamber and the second chamber are separated, and when the piston slides downward, the first chamber and the second chamber are connected.

[0025] The hydroelectric power generation component is installed on the offshore wind power foundation, and the inlet of the hydroelectric power generation component is connected to the first chamber through an inlet pipe, and the outlet of the hydroelectric power generation component is connected to the second chamber through a drain pipe.

[0026] The aforementioned wave power generation device and its installation method utilize ocean waves to drive floating components to slide up and down, thereby causing pistons to slide up and down and generating electricity from the hydroelectric components. This wave power generation device can be directly installed on decommissioned offshore wind turbine foundations, enabling rapid reuse of these foundations. This solves, to some extent, the problem of dismantling decommissioned offshore wind turbine foundations and also reduces project costs. Attached Figure Description

[0027] Figure 1 and Figure 2 This is a schematic diagram of a wave power generation device according to an embodiment of this application. It should be noted that, in order to clearly describe the structure of the wave power generation device, Figure 1 The wave power generation device shown does not display the inlet and outlet pipes, but... Figure 2 The wave power generation device shown does not display the floating component and the support component.

[0028] Figure 3 for Figure 1 or Figure 2 A top view of the wave power generation device provided.

[0029] Figure 4 for Figure 1 or Figure 2 A side view of the piston of the wave power generation device provided.

[0030] The labels in the attached diagram are explained as follows:

[0031] 100. Wave power generation device; 110. Floating component; 111. Sliding sleeve; 112. Floating body; 1121. End cap; 1122. Ring body; 113. Reinforcing component; 1131. Reinforcing rib; 1131a. Hole; 120. Piston assembly; 121. Piston rod; 122. Piston; 130. Support assembly; 131. Support rod; 140. Hydropower generation component; 141. Inlet pipe; 142. Drain pipe; 200. Offshore wind power foundation; 210. Bulkhead; M. Enclosed space; P. Upper inner cavity; Q. Lower inner cavity; Q1. First chamber; Q2. Second chamber; S. Sea surface. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical connection; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" 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. Similarly, "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.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] Ocean waves possess enormous energy that can be harnessed for power generation. Globally, the economically exploitable wave energy reserves are estimated at 100 million to 1 billion kW, while my country's theoretical wave energy reserves are approximately 70 million kW. Therefore, wave power generation devices can be installed on decommissioned offshore wind turbine foundations (i.e., offshore wind turbine foundations that have reached their design lifespan) to achieve wave power generation without dismantling the decommissioned foundations, thus reducing the cost of offshore wind farms.

[0039] like Figure 1 and Figure 2 As shown, one embodiment of this application provides a wave power generation device 100. This wave power generation device 100 can, as... Figure 1 and Figure 2As shown, an offshore wind turbine foundation 200 is installed on the foundation. A partition 210 is installed within the foundation 200 to divide its internal cavity into an upper cavity P and a lower cavity Q, separated from top to bottom. The offshore wind turbine foundation 200 can be a monopile foundation, jacket foundation, or other foundation with its bottom buried below the seabed. It should be noted again that the upper cavity P and the lower cavity Q of the offshore wind turbine foundation 200 are not connected; the medium (e.g., seawater) in the lower cavity Q will not flow into the upper cavity P.

[0040] See also Figure 1 The wave power generation device 100 may include: a floating component 110, a piston component 120, a support component 130, and a hydroelectric power generation component 140. The floating component 110 floats on the sea surface S and forms a closed space M between itself and the sea surface S. The floating component 110 is slidably mounted on the outside of the offshore wind power foundation 200. The piston assembly 120 includes a connected piston rod 121 and a piston 122. The piston rod 121 is supported on the floating component 110 by a support assembly 130. The piston 122 is slidably mounted in the lower inner cavity Q, dividing the lower inner cavity Q into a first chamber Q1 and a second chamber Q2 from top to bottom. When the piston 122 slides upward, the first chamber Q1 and the second chamber Q2 are separated, while when the piston 122 slides downward, the first chamber Q1 and the second chamber Q2 are connected. The hydroelectric power generation component 140 is mounted on the offshore wind power foundation 200. The liquid inlet of the hydroelectric power generation component 140 is connected to the first chamber Q1 through a water inlet pipe 141, and the liquid outlet of the hydroelectric power generation component 140 is connected to the second chamber Q2 through a drain pipe 142.

[0041] The working process of the wave power generation device 100 is described below:

[0042] When waves are generated on the sea surface S, causing it to rise from the first position to the second position, the volume of the enclosed space M enclosed by the floating component 110 and the sea surface S decreases while the pressure increases. This causes the floating component 110 to slide upwards along the outer wall of the offshore wind power foundation 200. During the upward sliding of the floating component 110, the piston 122 also slides upwards along the inner wall of the offshore wind power foundation 200. Since the first chamber Q1 is separated from the second chamber Q2 and the upper inner cavity P, the medium in the first chamber Q1 is squeezed into the water inlet pipe 141, and then flows into the hydroelectric power generation component 140 to generate electricity. Afterwards, it returns to the second chamber Q2 through the drain pipe 142. When the sea surface S falls back down from the second position, the volume of the enclosed space M enclosed by the floating component 110 and the sea surface S increases and the pressure decreases. The floating component 110 then slides down with the piston 122. At this time, the first chamber Q1 and the second chamber Q2 are connected, so that the medium in the second chamber Q2 flows to the first chamber Q1 to replenish the medium in the first chamber Q1, so as to ensure that there is enough medium to flow into the hydroelectric power generation component 140, thereby ensuring the normal power generation of the hydroelectric power generation component 140.

[0043] It should be noted that when the offshore wind turbine foundation 200 is in normal service, the tower installed on the offshore wind turbine foundation 200 is about 100m high, and the wind turbine blades are about 120m long. This results in an excessively large horizontal load exerted by the wind turbine blades on the offshore wind turbine foundation 200, while other loads are much smaller compared to this horizontal load, and have little impact on the service life of the offshore wind turbine foundation 200. Considering that the offshore wind turbine foundation 200 is only about 15m above the sea surface S, and that the wave power generation device 100 in this embodiment only relies on the floating component 110 to slide up and down on the offshore wind turbine foundation 200, the horizontal load exerted on the offshore wind turbine foundation 200 is very small, so even after the offshore wind turbine foundation 200 is decommissioned, its structural strength can still meet the safety requirements.

[0044] As can be seen, the wave power generation device 100 of this embodiment can utilize ocean waves to drive the floating component 110 to slide up and down, thereby driving the piston 122 to slide up and down, thus realizing the power generation of the hydroelectric power generation component 140. This wave power generation device 100 can be directly installed on decommissioned offshore wind turbine foundations 200, enabling the rapid reuse of decommissioned offshore wind turbine foundations 200, solving the problem of dismantling decommissioned offshore wind turbine foundations 200 to a certain extent, and also reducing project costs.

[0045] In some embodiments of this application, such as Figure 1As shown, the floating assembly 110 may include a sliding sleeve 111 and a floating body 112; the sliding sleeve 111 is slidably fitted onto the outside of the offshore wind power foundation 200; the floating body 112 includes an end cap 1121 and an annular body 1122, the end cap 1121 surrounds the sliding sleeve 111 and is located at the upper end of the annular body 1122, and the support assembly 130 is disposed on the end cap 1121. This floating assembly 110 not only has a simple structure, but also easily forms a sealed space M between itself and the sea surface S.

[0046] It should be noted that the lower edge of the sliding sleeve 111 has no gap with the outer peripheral surface of the offshore wind power foundation 200, so as to ensure that a closed space M is formed between the floating component 110 and the sea surface S; while the upper edge of the sliding sleeve 111 has a small gap with the outer peripheral surface of the offshore wind power foundation 200, so as to ensure that the sliding sleeve 111 can slide up and down along the offshore wind power foundation 200.

[0047] Furthermore, such as Figure 1 As shown, the floating component 110 may further include a reinforcing member 113, which is connected to the outer peripheral surface of the sliding sleeve 111 and the upper surface of the end cap 1121; the support component 130 is connected to the reinforcing member 113. The reinforcing member 113 can increase the strength of the floating component 110.

[0048] Among them, such as Figure 1 and Figure 2 As shown, the reinforcement member 113 includes a plurality of reinforcing ribs 1131 spaced circumferentially along the sliding sleeve 111; the reinforcing ribs 1131 are in the shape of right triangles, wherein one right-angled side of the reinforcing rib 1131 is connected to the sliding sleeve 111, the other right-angled side of the reinforcing rib 1131 is connected to the end cap 1121, and the inclined surface of the reinforcing rib 1131 is connected to the support assembly 130. By composing the reinforcement member 113 with at least a plurality of reinforcing ribs 1131, the weight of the reinforcement member 113 can be reduced, ensuring that the floating assembly 110 floats on the sea surface S; furthermore, setting each reinforcing rib 1131 in a triangular shape not only facilitates connection with the support assembly 130, the sliding sleeve 111, and the end cap 1121, but also makes the structure of the reinforcing ribs 1131 more stable.

[0049] The reinforcing ribs 1131 can be evenly distributed along the circumference of the sliding sleeve 111, thus ensuring uniform stress distribution on the reinforcing ribs 1131. The number of reinforcing ribs 1131 can be set according to specific circumstances, as long as the fixed ribs are reliably connected to the support assembly 130, the sliding sleeve 111, and the end cap 1121. For example, two, three, four, five, six, or more can be set.

[0050] The reinforcing rib plate 1131 can be connected to the support component 130, the sliding sleeve 111, and the end cap 1121 by welding, screws, or other means.

[0051] Reinforcing rib 1131 can also be used as follows Figure 1 As shown, it has a hollowed-out area. The hollowed-out area can further reduce the weight of the reinforcing member 113, ensuring that the floating component 110 floats on the sea surface S. The reinforcing rib 1131 may have holes 1131a in the hollowed-out area. The shape of the holes 1131a can be polygonal, circular, etc. Figure 1 The quarter-circle or irregular shape shown is not specifically limited in the embodiments of this application.

[0052] In some embodiments of this application, such as Figure 1 As shown, the support assembly 130 may include multiple support rods 131. The upper ends of the multiple support rods 131 are located in the upper inner cavity P and intersect each other. The lower ends of the multiple support rods 131 are circumferentially spaced along the offshore wind power foundation 200 and connected to the floating body 110. The upper end of the piston rod 121 is connected to the intersection of the multiple support rods 131. This structure of the support assembly 130 facilitates connection with the piston rod 121, thereby enabling the piston 122 to slide up and down along the inner wall of the offshore wind power foundation 200.

[0053] It should be noted that the upper inner cavity P of the offshore wind turbine foundation 200 is a non-sealed space. Through holes can be made in the cavity wall of the upper inner cavity P of the offshore wind turbine foundation 200, allowing the upper end of the support rod 131 to extend into the upper inner cavity P of the offshore wind turbine foundation 200 through these through holes. The through holes are strip-shaped to ensure that the support rod 131 slides up and down under the action of the floating component 110. The number and position of the through holes can be set according to the support rod 131.

[0054] The upper ends of multiple support rods 131 can be joined together by welding, integral molding or other methods, and the joint of multiple support rods 131 can be connected to the upper end of piston rod 121 by welding, screws or other methods. The lower end of support rod 131 can be connected to the corresponding reinforcing rib plate 1131 by welding, screws or other methods.

[0055] In some embodiments of this application, such as Figure 4 As shown, piston 122 is a downwardly convex arc-shaped gasket. When piston 122 slides upward, the medium in the first chamber Q1 presses down on the outer edge of piston 122, causing the outer edge of piston 122 to fit tightly against the inner wall of the offshore wind turbine foundation 200, thus preventing the medium in the first chamber Q1 from flowing into the second chamber Q2. When piston 122 slides downward, the pressure in the second chamber Q2 below piston 122 increases, and the medium in the second chamber Q2 is forced from the outer edge of piston 122 into the first chamber Q1. This piston 122 structure is simple and can achieve unidirectional conduction. Piston 122 can be a rubber gasket.

[0056] In some embodiments of this application, such as Figure 2 As shown, the lower end of the inlet pipe 141 passes through the upper inner cavity P and connects to the partition plate 210. Integrating the inlet pipe 141 into the offshore wind turbine foundation 200 provides some protection for the inlet pipe 141 and simplifies its structure; the inlet pipe 141 can be a straight pipe. The hydroelectric power generation component 140 can be installed on top of the offshore wind turbine foundation 200.

[0057] Similarly, as Figure 2 As shown, the lower end of the drain pipe 142 is sealed and passes through the partition 210 and the piston 122 in sequence, extending into the second chamber Q2. Integrating the drain pipe 142 into the offshore wind turbine foundation 200 can provide some protection for the drain pipe 142 and also simplify its structure; the drain pipe 142 can be a straight pipe.

[0058] A sealing ring may be installed between the drain pipe 141 and the partition 210. The sealing ring can play a sealing role to prevent the medium in the first chamber Q1 from flowing into the upper chamber P. The sealing ring can be a rubber ring, which can be installed on the water inlet pipe 141 or the partition 210 by means of adhesive bonding or other methods.

[0059] The piston 122 can be interference-fitted with the drain pipe 142 to ensure the sealing of the first chamber Q1 when the piston 122 moves upward. The piston 122 has a through hole for the drain pipe 142 to pass through, and the diameter of the through hole is smaller than the diameter of the drain pipe 142.

[0060] On the other hand, another embodiment of this application also provides a method for installing a wave power generation device 100, the method comprising:

[0061] Step S100: Remove the wind turbine head and tower of the offshore wind power generation device from the decommissioned offshore wind power foundation 200. The offshore wind power foundation 200 is equipped with a partition 210 to divide the inner cavity of the offshore wind power foundation 200 into an upper inner cavity P and a lower inner cavity Q that are separated from top to bottom.

[0062] Step S200: The floating component 110 is slidably fitted onto the outside of the offshore wind power foundation 200, and the floating component 110 is placed on the sea surface S so that a closed space M is formed between the floating component 110 and the sea surface S.

[0063] Step S300: The piston rod 121 of the piston assembly 120 is supported on the floating assembly 110 by the support assembly 130, and the piston 122 of the piston assembly 120 is slidably disposed in the lower inner cavity Q, so that the lower inner cavity Q is divided into a first chamber Q1 and a second chamber Q2 from top to bottom. When the piston 122 slides upward, the first chamber Q1 and the second chamber Q2 are separated, and when the piston 122 slides downward, the first chamber Q1 and the second chamber Q2 are connected.

[0064] Step S400: The hydropower generation component 140 is installed on the offshore wind power foundation 200, and the liquid inlet of the hydropower generation component 140 is connected to the first chamber Q1 through the water inlet pipe 141, and the liquid outlet of the hydropower generation component 140 is connected to the second chamber Q2 through the drain pipe 142.

[0065] By using this installation method to install the wave power generation device 100, the wave power generation device 100 can be directly installed on the decommissioned offshore wind power foundation 200, which can realize the rapid reuse of the decommissioned offshore wind power foundation 200, solve the problem of dismantling the decommissioned offshore wind power foundation 200 to a certain extent, and also reduce the project cost.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A wave power generation device, characterized in that, Installed on an offshore wind turbine foundation, the offshore wind turbine foundation is equipped with a partition to divide the inner cavity of the offshore wind turbine foundation into an upper inner cavity and a lower inner cavity that are separated from top to bottom. The wave power generation device includes: a floating component, a piston component, a support component, and a hydroelectric power generation component; The floating component floats on the sea surface and forms a closed space between itself and the sea surface. The floating component can be slidably fitted onto the outside of the offshore wind power foundation. The piston assembly includes a connected piston rod and a piston. The piston rod is supported on the floating assembly by the support assembly. The piston is slidably disposed in the lower inner cavity to divide the lower inner cavity into a first chamber and a second chamber from top to bottom. When the piston slides upward, the first chamber and the second chamber are separated, and when the piston slides downward, the first chamber and the second chamber are connected. The upper end of the piston rod is connected to the intersection of a plurality of support rods. The piston is a downwardly protruding arc-shaped gasket. The support assembly includes a plurality of support rods. The upper ends of the plurality of support rods are located in the upper inner cavity and intersect with each other. The lower ends of the plurality of support rods are spaced apart along the circumference of the offshore wind power foundation and connected to the floating assembly. The hydroelectric power generation component is installed on the offshore wind power foundation. The liquid inlet of the hydroelectric power generation component is connected to the first chamber through a water inlet pipe, and the liquid outlet of the hydroelectric power generation component is connected to the second chamber through a drain pipe. The lower end of the water inlet pipe passes through the upper inner cavity and is connected to the partition plate. The lower end of the drain pipe passes through the partition plate and the piston in sequence and extends into the second chamber.

2. The wave power generation device according to claim 1, characterized in that, The floating assembly includes a sliding sleeve and a floating body; The sliding sleeve can be slidably fitted onto the outside of the offshore wind power foundation; The floating body includes an end cap and an annular body. The end cap surrounds the sliding sleeve and is located at the upper end port of the annular body. The support component is located on the end cap.

3. The wave power generation device according to claim 2, characterized in that, The floating component also includes a reinforcing member, which is connected to the outer peripheral surface of the sliding sleeve and the upper surface of the end cap, and the support component is connected to the reinforcing member.

4. The wave power generation device according to claim 3, characterized in that, The reinforcement includes a plurality of reinforcing ribs spaced circumferentially along the sliding sleeve; The reinforcing rib is in the shape of a right triangle, wherein one right-angled side of the reinforcing rib is connected to the sliding sleeve, the other right-angled side of the reinforcing rib is connected to the end cap, and the inclined surface of the reinforcing rib is connected to the support assembly.

5. The wave power generation device according to claim 4, characterized in that, The reinforcing rib has a hollowed-out area.

6. A method for installing a wave power generation device as described in any one of claims 1 to 5, characterized in that, The installation method includes: The wind turbine head and tower of the offshore wind power generation device are removed from the decommissioned offshore wind power foundation, wherein the offshore wind power foundation is equipped with a partition to divide the inner cavity of the offshore wind power foundation into an upper inner cavity and a lower inner cavity that are separated from top to bottom. The floating component is slidably fitted onto the outside of the offshore wind power foundation and placed on the sea surface to form a sealed space between the floating component and the sea surface. The piston rod of the piston assembly is supported on the floating assembly by a support component, and the piston of the piston assembly is slidably disposed in the lower inner cavity, so that the lower inner cavity is divided into a first chamber and a second chamber from top to bottom. When the piston slides upward, the first chamber and the second chamber are separated, and when the piston slides downward, the first chamber and the second chamber are connected. The hydroelectric power generation component is installed on the offshore wind power foundation, and the inlet of the hydroelectric power generation component is connected to the first chamber through an inlet pipe, and the outlet of the hydroelectric power generation component is connected to the second chamber through a drain pipe.

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