A semi-submersible wind turbine platform and an assembly method

Abstract

The present invention discloses a semi-submersible wind turbine platform, comprising: a main platform assembly, including a central pontoon and at least three main pontoons, the central pontoon and the main pontoons are both arranged vertically; a main truss assembly, used to connect adjacent main pontoons and connect each main pontoon to the central pontoon; at least three groups of sub-platform assemblies, the sub-platform assemblies are arranged one-to-one with the main pontoons, each group of sub-platform assemblies includes at least two vertically arranged sub-pontoons, and the sub-pontoons are located on the side of the main pontoon away from the central pontoon; at least three groups of sub-truss assemblies correspond one-to-one with at least three groups of sub-platform assemblies, respectively, and the sub-truss assemblies are used to connect adjacent sub-pontoons in the corresponding sub-platform assemblies and connect each sub-pontoon to the corresponding main pontoon. The present invention also discloses a semi-submersible wind turbine platform assembly method. The wind turbine platform structure provided with the sub-platform assembly has stronger wave resistance, is briefed on the needs of large equipment, is easy to disassemble and assemble, and saves structural costs.

Description

Technical Field

[0001] The present invention relates to the field of offshore wind turbine platforms, and particularly to a semi-submersible wind turbine platform and an assembly method thereof. Background Art

[0002] Wind power resources are a kind of green and renewable resources. At present, the wind power technology based on large-diameter pile foundations and jacket structures has been relatively mature, and can better solve the technical problems of wind turbine installation in waters with a water depth less than 50m. However, for waters with a water depth greater than 50m, if pile foundations or jacket structures are adopted, the cost will increase significantly, and at the same time, the technical difficulty and the requirements for installation equipment are also increasing.

[0003] Offshore floating wind power foundations have great advantages in applications in deep waters compared with pile foundations and jackets, etc., and have broad development potential. There are various forms of offshore floating wind power foundations, mainly classified into semi-submersible, single-column, and tension leg types. The floating platform can be installed by the method of onshore integrated prefabrication and offshore transportation. The existing semi-submersible wind turbine platforms use relatively large-diameter floating cylinders to support the wind turbines, with high costs and poor stability. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a semi-submersible wind turbine platform, which can reduce costs and improve the stability of the wind turbine platform.

[0005] The present invention also provides an assembly method for a semi-submersible wind turbine platform.

[0006] A semi-submersible wind turbine platform according to an embodiment of the first aspect of the present invention includes: a main platform assembly, including a central floating cylinder and at least three main floating cylinders evenly distributed circumferentially around the central floating cylinder, both the central floating cylinder and the main floating cylinders being vertically arranged; a main truss assembly for connecting adjacent main floating cylinders and connecting each main floating cylinder with the central floating cylinder; at least three groups of sub-platform assemblies, the sub-platform assemblies being arranged in one-to-one correspondence with the main floating cylinders, each group of sub-platform assemblies including at least two vertically arranged sub-floating cylinders, the sub-floating cylinders being located on the side of the main floating cylinder away from the central floating cylinder; and at least three groups of sub-truss assemblies, corresponding to at least three groups of sub-platform assemblies respectively, the sub-truss assemblies being used for connecting adjacent sub-floating cylinders within the corresponding sub-platform assemblies and connecting each sub-floating cylinder with the corresponding main floating cylinder.

[0007] It has at least the following beneficial effects: At least three main floats are evenly distributed circumferentially on the central float, and at least two sub-floats are provided on each main float, so that the overall support range of the wind turbine platform in the present invention on the horizontal plane is larger and more stable. Therefore, the outer diameters of the central float and the main floats can be set smaller compared to the floats in the prior art. The wind turbine platform structure with a sub-platform assembly has stronger wave resistance. In addition, the inside of the main platform assembly, the inside of the sub-platform assembly, and between the main platform assembly and the sub-platform assembly can be installed through sub-truss assemblies or main-truss assemblies. Therefore, the present invention has a lower demand for large equipment, the radius of the wind turbine platform is larger, which is beneficial for support, and it can allow obstacles to be between two groups of sub-floats, is applicable to more complex marine environments, and is convenient for disassembly and assembly, saving structural costs.

[0008] According to some embodiments of the present invention, the main-truss assembly includes a plurality of main-truss rods. Between adjacent main floats and between the main float and the central float are connected by the main-truss rods. A plurality of first recessed portions are provided on both the central float and the main floats, and the main-truss rods are in plug-in fit with the first recessed portions.

[0009] According to some embodiments of the present invention, the sub-truss assembly includes a plurality of sub-truss rods. Between adjacent sub-floats and between the sub-float and the main float are connected by the sub-truss rods. A plurality of second recessed portions are provided on both the sub-float and the main floats, and the sub-truss rods are in plug-in fit with the second recessed portions.

[0010] According to some embodiments of the present invention, an additional sub-platform assembly is provided on one side of each sub-platform facing away from the main float, and the additional sub-platform assembly includes at least two vertically arranged sub-floats.

[0011] According to some embodiments of the present invention, a plurality of bulkheads are distributed in both the main float and the central float. The plurality of bulkheads in the main float divide the interior of the main float into a plurality of annularly arranged main-float ballast tanks, and ballast water can be injected into each main-float ballast tank in sequence from bottom to top. The plurality of bulkheads in the central float divide the interior of the central float into a plurality of annularly arranged central-float ballast tanks, and ballast water can be injected into each central-float ballast tank in sequence from bottom to top.

[0012] According to some embodiments of the present invention, the main float includes a circular cylinder body, and a truss structure composed of H-shaped steel is arranged inside the cylinder body.

[0013] According to some embodiments of the present invention, heave plates are provided at the center of the sub-platform assembly and at the bottom of the sub-float.

[0014] A method for assembling a semi-submersible wind turbine platform according to an embodiment of the second aspect of the present invention includes the following steps: Step S1, prepare a main truss assembly, a central buoy, and at least three main buoys. The main truss assembly includes multiple main truss rods. Connect adjacent main buoys through a part of the main truss rods, and connect each main buoy and the central buoy through another part of the main truss rods; Step S2, prepare multiple groups of sub-platform assemblies and multiple groups of sub-truss assemblies. Each group of sub-platform assemblies includes at least two vertically arranged sub-buoys. The sub-truss assembly includes multiple sub-truss rods. Connect adjacent sub-buoys through a part of the sub-truss rods, and connect the sub-buoys and the corresponding main buoys through another part of the sub-truss rods; Step S3, install a wind turbine tower on the top of the central buoy, and install heave plates at the bottoms of the central buoy and the sub-buoys.

[0015] It has at least the following beneficial effects: The method for assembling the semi-submersible wind turbine platform in the present invention is more convenient. Assembly can be achieved through the plug-in cooperation between the main truss rods and sub-truss rods and various buoys, which is convenient for transportation and saves costs. In addition, the wind turbine platform structure with sub-platform assemblies has stronger wave resistance.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0017] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Reference numerals in the drawings: Central buoy 100, Main buoy 200, Sub-buoy 300, Main truss rod 400, Sub-truss rod 500. Detailed Description of the Embodiment

[0020] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] Reference Figure 1 The present invention discloses a semi-submersible wind turbine platform, including a main platform assembly, a main truss assembly, at least three groups of sub-platform assemblies and at least three groups of sub-truss assemblies.

[0025] Among them, the main platform assembly includes a central pontoon 100 and at least three main pontoons 200 uniformly distributed around the central pontoon 100. The central pontoon 100 and the main pontoons 200 are both vertically arranged. The main truss assembly is used to connect adjacent main pontoons 200 and connect each main pontoon 200 with the central pontoon 100. The sub-platform assembly is arranged in a one-to-one correspondence with the main pontoons 200. Each group of sub-platform assemblies includes at least two vertically arranged sub-pontoons 300. The sub-pontoons 300 are located on the side of the main pontoon 200 away from the central pontoon 100. The multiple groups of sub-truss assemblies correspond one-to-one to at least three groups of sub-platform assemblies respectively. The sub-truss assemblies are used to connect adjacent sub-pontoons 300 in the corresponding sub-platform assemblies and connect each sub-pontoon 300 with the corresponding main pontoon 200.

[0026] It can be understood that in the present invention, at least three main buoys 200 are evenly distributed around the circumference of the central buoy 100, and at least two sub-buoys 300 are arranged on each main buoy 200, so that the overall support range of the wind turbine platform in the present invention on the horizontal plane is larger and more stable, so the outer diameter of the central buoy 100 and the main buoy 200 can be set smaller than the buoy in the prior art. The wind turbine platform structure provided with a sub-platform assembly has a stronger wave resistance. In addition, the inside of the main platform assembly, the inside of the sub-platform assembly, and between the main platform assembly and the sub-platform assembly can be installed through a sub-truss assembly or a main truss assembly. Therefore, the present invention has a lower demand for large equipment, the radius of the wind turbine platform is larger, which is conducive to support, and obstacles can be allowed between the two groups of sub-buoys. It is suitable for more complex offshore environments, and is easy to disassemble and assemble, saving structural costs.

[0027] It should be noted that the at least three main buoys 200 in the present invention can form a polygonal shape around the central buoy 100. When the number of the main buoys 200 is three, the three main buoys 200 can form a polygonal shape as follows: Figure 1The triangle shown.

[0028] In addition, it should be noted that the main buoy 200 may adopt an internal assembled truss structure, which is covered with a circular steel pipe.

[0029] The main truss assembly in the embodiment of the present invention includes a plurality of main truss rods 400, and the adjacent main buoys 200 and the main buoys 200 and the central buoy 100 are connected by the main truss rods 400, and the central buoy 100 and the main buoy 200 are provided with a plurality of first recessed portions, and the main truss rods 400 are plugged and matched with the first recessed portions. A node plate is also provided at the matching position between the main truss rod 400 and the first recessed portion, and bolts are provided on the node plate, and the main buoy 200 and the central buoy 100 can be fastened to the main truss rod 400 through the node plate matching bolts.

[0030] The sub-truss assembly in the embodiment of the present invention includes a plurality of sub-truss rods 500, and adjacent sub-pontoons 300 and sub-pontoons 300 and main pontoons 200 are connected via the sub-truss rods 500. A plurality of second recesses are provided on the sub-pontoons 300 and the main pontoons 200, and the sub-truss rods 500 are plugged into and fit with the second recesses.

[0031] It is understandable that each sub-platform in the embodiment of the present invention is provided with an additional sub-platform assembly (not shown in the figure) on the side away from the main buoy 200, and the additional sub-platform assembly includes at least two vertically arranged sub-buoys 300 to further expand the support range of the wind turbine platform.

[0032] In the embodiment of the present invention, multiple bulkheads are distributed in the main buoy 200 and the central buoy 100. The multiple bulkheads in the main buoy 200 divide the interior of the main buoy 200 into multiple main buoy ballast tanks arranged in an annular manner. Each main buoy ballast tank can be injected with ballast water in sequence from bottom to top. The multiple bulkheads in the central buoy 100 divide the interior of the central buoy 100 into multiple central buoy ballast tanks arranged in an annular manner. Each central buoy ballast tank can be injected with ballast water in sequence from bottom to top. The interior of the buoy in the prior art is not divided into multiple cavities, so when water is injected, the water in the buoy will have a larger flow range, which will cause the buoy to shake and reduce the stability of the buoy when water is injected. The present invention divides the main buoy 200 and the central buoy 100 into different spaces by bulkheads. When injecting ballast water, the water can be injected into each ballast tank in sequence from bottom to top. Since the ballast tank can limit the flow range of the water, the stability of the buoy can be greatly improved.

[0033] The main buoy 200 includes a circular cylinder, and a truss structure composed of H-shaped steel is arranged inside the cylinder. Specifically, the main buoy 200 can adopt a circular cylinder with an H-shaped steel reinforced tube wall structure, and the main truss assembly adopts a whole upper and lower chord rod, and the upper and lower chord rods are hingedly connected by rods.

[0034] It is understandable that a heaving plate is provided at the center of the sub-platform component and the bottom of the sub-floater 300 in the embodiments of the present invention. The heaving plate can increase the heaving performance of the sub-platform and also improve the damping performance of the roll and pitch of the entire wind turbine platform. The heaving plates are assembled by connecting the respective sub-floaters 300 with cables and are assembled layer by layer at a certain interval.

[0035] The present invention also discloses a method for assembling a semi-submersible wind turbine platform, which includes the following steps:

[0036] Step S1: Prepare the main truss component, the central floater 100, and at least three main floaters 200. The main truss component includes multiple main truss rods 400. Connect adjacent main floaters 200 through a part of the main truss rods 400, and connect each main floater 200 to the central floater 100 through another part of the main truss rods 400;

[0037] Step S2: Prepare multiple groups of sub-platform components and multiple groups of sub-truss components. Each group of sub-platform components includes at least two vertically arranged sub-floaters 300. The sub-truss component includes multiple sub-truss rods 500. Connect adjacent sub-floaters 300 through a part of the sub-truss rods 500, and connect each sub-floater 300 to the corresponding main floater 200 through another part of the sub-truss rods 500;

[0038] Step S3: Install a wind turbine tower on the top of the central floater 100 and install a heaving plate at the bottom of the central floater 100.

[0039] It is understandable that in the method for assembling the wind turbine platform in the present invention, at least three main floaters 200 are evenly distributed circumferentially around the central floater 100, and at least two sub-floaters 300 are provided on each main floater 200, so that the overall support range of the wind turbine platform in the present invention on the horizontal plane is larger and more stable. Therefore, the outer diameters of the central floater 100 and the main floaters 200 can be set smaller compared to the floaters in the prior art. The wind turbine platform structure provided with the sub-platform component has stronger wave resistance. In addition, large equipment can be installed inside the main platform component, inside the sub-platform component, and between the main platform component and the sub-platform component through the sub-truss component or the main truss component. Therefore, the present invention has a lower demand for large equipment, is convenient for disassembly and assembly, and saves structural costs.

[0040] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0041] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A semi-submersible wind turbine platform, characterized in that, Comprising: A main platform component, including a central buoy and at least three main buoys evenly distributed circumferentially around the central buoy, both the central buoy and the main buoys are vertically arranged; A main truss component for connecting adjacent main buoys and connecting each main buoy to the central buoy; At least three groups of sub-platform components, the sub-platform components are arranged in one-to-one correspondence with the main buoys, and each group of sub-platform components includes at least two vertically arranged sub-buoys, and the sub-buoys are located on the side of the main buoy away from the central buoy; At least three groups of sub-truss components, corresponding to at least three groups of sub-platform components respectively, and the sub-truss components are used to connect adjacent sub-buoys within the corresponding sub-platform components and connect each sub-buoy to the corresponding main buoy.

2. The semi-submersible wind turbine platform according to claim 1, characterized in that, The main truss component includes a plurality of main truss rods, and adjacent main buoys and between the main buoy and the central buoy are connected by the main truss rods. A plurality of first recesses are formed on both the central buoy and the main buoys, and the main truss rods are inserted and matched with the first recesses.

3. A semi-submersible wind turbine platform according to claim 1, characterized in that, The sub-truss component includes a plurality of sub-truss rods, and adjacent sub-buoys and between the sub-buoy and the main buoy are connected by the sub-truss rods. A plurality of second recesses are formed on both the sub-buoy and the main buoys, and the sub-truss rods are inserted and matched with the second recesses.

4. A semi-submersible wind turbine platform according to claim 3, characterized in that, An additional sub-platform component is provided on the side of each sub-platform away from the main buoy, and the additional sub-platform component includes at least two vertically arranged sub-buoys.

5. A semi-submersible wind turbine platform according to claim 1, characterized in that, A plurality of bulkheads are distributed in both the main buoy and the central buoy. The plurality of bulkheads in the main buoy divide the interior of the main buoy into a plurality of annularly arranged main buoy ballast tanks, and each main buoy ballast tank can be filled with ballast water sequentially from bottom to top. The plurality of bulkheads in the central buoy divide the interior of the central buoy into a plurality of annularly arranged central buoy ballast tanks, and each central buoy ballast tank can be filled with ballast water sequentially from bottom to top.

6. A semi-submersible wind turbine platform according to claim 1, characterized in that, The main buoy includes a circular cylinder body, and a truss structure composed of H-shaped steel is arranged inside the cylinder body.

7. The semi-submersible wind turbine platform according to claim 1, wherein, Heaving plates are provided at the center of the sub-platform component and at the bottom of the sub-buoy.

8. A method for assembling a semi-submersible wind turbine platform, characterized in that, Including the following steps: Step S1, prepare a main truss component, a central buoy and at least three main buoys. The main truss component includes a plurality of main truss rods. Connect adjacent main buoys through a part of the main truss rods, and connect each main buoy to the central buoy through another part of the main truss rods; Step S2, prepare multiple groups of sub-platform components and multiple groups of sub-truss components. Each group of sub-platform components includes at least two vertically arranged sub-buoys. The sub-truss component includes a plurality of sub-truss rods. Connect adjacent sub-buoys through a part of the sub-truss rods, and connect the sub-buoy to the corresponding main buoy through another part of the sub-truss rods; Step S3, install a wind turbine tower on the top of the central buoy, and install heaving plates at the bottoms of the central buoy and the sub-buoys.

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