Eccentric semi-submersible floating fan reinforced concrete platform

Abstract

The utility model discloses an eccentric semi-submersible floating fan reinforced concrete platform which comprises a heaving plate and three groups of buoys distributed on the top of the heaving plate in a triangular shape. The top of the heaving plate is further provided with a draught fan stand column located between the first floating barrel set and the second floating barrel set, and the draught fan stand column and the third floating barrel set are distributed in a T shape. The upper part of the fan stand column is connected with the upper parts of the floating barrels through corresponding horizontal supports; according to the semi-submersible floating body, a multi-truss-support structure in a traditional semi-submersible floating body is omitted, the draught fan stand columns and the three sets of floating barrels are distributed in a T shape and connected and reinforced through the horizontal supports, the simplification of the whole floating body structure is achieved on the premise that the structural strength is guaranteed, the fatigue load of the structure is effectively reduced, and the structural durability and safety of the whole floating body are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, and particularly relates to an eccentric semi-submersible floating wind turbine steel-concrete platform. Background Technique

[0002] Compared with the offshore sea areas, the sea breeze resources in the deep sea are more abundant, and the wind turbines with floating foundations are more advantageous in the sea areas with a water depth exceeding 60 meters. At present, the floating wind turbine foundations are mainly divided into different types such as column type, semi-submersible type, tension leg type and barge type.

[0003] As one of the floating wind turbine foundations, the semi-submersible foundation has the advantages of a wide range of applicable water depths and flexible deployment. The traditional semi-submersible foundation mostly adopts a three-float structure, and the wind turbine is installed at the center position of the three floats or above the floats, which usually results in a relatively high center of gravity of the foundation and reduces the stability of the foundation.

[0004] For example, in the patent publication number CN 216332633 U "Semi-submersible steel-concrete floating wind turbine foundation", three columns are arranged in an equilateral shape, and the wind turbine unit is located on any one of the columns, and cross braces connect the tops of the three columns;

[0005] However, in order to strengthen the connection strength between the three columns, more cross braces are required, consuming more steel.

[0006] For example, in the patent publication number CN114148462A "Semi-submersible floating platform based on single-point mooring and eccentric wind turbine system", the transverse bridge heave plate and the longitudinal bridge heave plate are connected by floats connected to each heave plate, and float cavities are formed at the positions where the floats are connected, so that the platform always operates at the azimuth angle with the minimum environmental load, which can ensure the stability of the platform and reduce the load;

[0007] However, the wind turbine unit is not directly installed on the column, resulting in a longer force transmission path, which may affect the force transmission efficiency and the stability of the structure. Especially under uneven stress, local stress concentration and structural damage may occur. Content of the Utility Model

[0008] The purpose of the utility model is to provide an eccentric semi-submersible floating wind turbine steel-concrete platform to solve the problems put forward in the above background technique.

[0009] To achieve the above purpose, the utility model provides the following technical solutions:

[0010] An eccentric semi-submersible floating wind turbine steel-concrete platform, comprising heave plates and three groups of floats distributed in a triangular shape on the top of the heave plates;

[0011] A fan column is also provided on the top of the heave plate and is located between the first and second groups of buoys, and the fan column and the three groups of buoys form a "T" shape distribution;

[0012] The upper part of the fan column and the upper part of each group of buoys are connected through corresponding horizontal supports.

[0013] Preferably, the three groups of buoys are arranged in an equilateral triangle.

[0014] Preferably, a wind turbine set is installed on the wind turbine column.

[0015] Preferably, a first reinforcement structure is provided at the junction between the lower portion of the fan column and the heave plate.

[0016] Preferably, a second reinforcement structure is provided at the end of the horizontal support between the third group of buoys and the wind turbine columns.

[0017] Preferably, the buoy and the heave plate are made of pure steel structure; or

[0018] The buoy is a pure steel structure, and the heave plate is a prefabricated reinforced concrete structure.

[0019] Preferably, the buoy, fan column and heave plate are prefabricated reinforced concrete structures;

[0020] The buoy and the fan column are connected to the heave plate through corresponding embedded parts;

[0021] The outline size of the embedded part is matched with the corresponding buoy / fan column, the embedded part is embedded in the heave plate, and an anti-pullout part with a widened area is fixedly arranged at the lower end of the embedded part.

[0022] Preferably, the heave plates include circular heave plates and transverse heave plates, the circular heave plates are arranged at the lower ends of the buoys in one-to-one correspondence, and the circular heave plates are connected in pairs through the transverse heave plates.

[0023] Preferably, the outer surface of the buoy and / or the heave plate is covered with a layer of steel plate.

[0024] Preferably, evenly distributed prestressed steel bars are provided in the buoy and the heave plate.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The utility model does not have the multi-truss structure of the traditional semi-submersible floating body. The wind turbine columns and three groups of buoys form a "T"-shaped distribution and are connected and strengthened by horizontal braces. The overall floating structure is simple while ensuring the structural strength, effectively reducing the fatigue load of the structure and enhancing the structural durability and safety of the overall floating body.

[0027] Different from the prior art where a wind turbine is installed on a floating barrel or at the central position, the present utility model adds a wind turbine column for installing the wind turbine, reducing the force transmission path of the wind turbine and thus improving the overall stability of the floating foundation. Installing the wind turbine on the wind turbine column is closer to the center than installing it on the floating barrel, reducing the difficulty for the floating foundation to maintain balance. At the same time, the structural stress is smaller, reducing the effects of various loads on the floating wind turbine platform and improving the durability of the floating wind turbine platform.

[0028] By strengthening the design of the lower end of the wind turbine column and the end of the horizontal brace, a large load is prevented from being transmitted to the lower heaving plate below. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model;

[0031] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present utility model;

[0032] Figure 3 It is a connection schematic diagram between the circular heaving plate and the transverse heaving plate of the present utility model.

[0033] The reference numerals in the drawings are represented as:

[0034] 1. Floating barrel; 11. Anti-pulling member; 2. Heaving plate; 21. Circular heaving plate; 22. Transverse heaving plate; 23. Steel plate; 3. Wind turbine column; 4. Horizontal brace; 5. Wind turbine. Specific Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0036] Embodiment 1:

[0037] An eccentric semi-submersible floating wind turbine steel-concrete platform, as shown in the attached Figure 1 figure, includes three groups of floating barrels 1 distributed in an equilateral triangle, as well as a heaving plate 2, a wind turbine column 3, and a horizontal brace 4;

[0038] The heaving plate 2 includes three groups of circular heaving plates 21 and three groups of transverse heaving plates 22. The three groups of circular heaving plates 21 are connected by the three groups of transverse heaving plates 22 to form a triangular structure with a hollow middle part.

[0039] The buoy 1 is fixedly installed coaxially on the top of the corresponding circular heaving plate 21. The outer diameter of the circular heaving plate 21 is larger than that of the buoy 1. The wind turbine column 3 is fixedly installed at the central position of the top of one of the transverse heaving plates 22. The wind turbine column 3 is used to install the wind turbine 5. The wind turbine column 3 is located at the central position between the first group of buoys 1 and the second group of buoys 1. A corresponding horizontal brace 4 is connected between the upper part of the wind turbine column 3 and the upper parts of the three groups of buoys 1. The wind turbine column 3, the three groups of buoys 1 and the three horizontal braces 4 form a "T" - shaped structure, which not only has a more concise structure but also reduces the generation probability of fatigue stress.

[0040] Since the wind turbine column 3 is directly installed on the top of the heaving plate 2, the load will be directly transmitted to the heaving plate 2 at the bottom of the wind turbine column 3. Therefore, a first strengthening structure is formed by thickening the connection part between the lower end of the wind turbine column 3 and the heaving plate 2. A second strengthening structure is formed by thickening the end of the horizontal brace 4 near the wind turbine column 3 between the third group of buoys 1 and the wind turbine column 3. Together with the cooperation among the three parts of the "T" - shaped structure, it can prevent the impact of the wind turbine load on the structure of the lower heaving plate 2.

[0041] The first strengthening structure and the second strengthening structure are located on the load transmission path of the wind turbine to enhance the bearing capacity of the overall structure, prevent the impact of the wind turbine load on the structure of the heaving plate 2, and avoid large loads being transmitted to the heaving plate 2.

[0042] As Figure 1 shown, the buoy 1, the heaving plate 2, the wind turbine column 3 and the horizontal brace 4 are made of pure steel structure.

[0043] Embodiment 2:

[0044] It includes all the contents of Embodiment 1, and the difference is that: the buoy 1, the horizontal brace 4 and the wind turbine column 3 are made of pure steel structure, and the heaving plate 2 is made of precast reinforced concrete structure.

[0045] The upper steel structure + the bottom reinforced concrete structure is beneficial to reducing the overall center of gravity and improving the stability. Compared with the complex reinforcing rib structure of the steel heaving plate 2, the precast reinforced concrete structure of the heaving plate 2 reduces the manufacturing difficulty of the structure.

[0046] Embodiment 3:

[0047] It includes all the contents of Embodiment 1, and the difference is that: as Figures 2-3As shown in the figure, the horizontal brace 4 is made of pure steel structure, and the pontoon 1, the wind turbine column 3 and the heaving plate 2 are made of reinforced concrete structure.

[0048] The pontoon 1 is connected to the heaving plate 2 through embedded parts.

[0049] Embed the embedded parts (steel plates) with the same size as the pontoon 1 in advance in the precast concrete structure of the heaving plate 2. Weld a circle of disc-shaped uplift resistance 11 at the lower end of the embedded parts to improve its uplift resistance performance. After sealing, it forms an integral whole. This construction method can avoid the erosion of the precast concrete structure of the heaving plate 2 by seawater penetration and thus the damage of the heaving plate 2. The principle of installing the wind turbine column 3 on the pontoon 1 is similar to that of the pontoon 1 and will not be elaborated here.

[0050] The concrete materials used for the pontoon 1, the wind turbine column 3 and the heaving plate 2 are UHPC high-performance concrete materials. They need to be precast into sections at the construction site and round holes are reserved on the surface. Then they are transported to the shipyard for general assembly and closure. When closing, prestressed steel bars are passed through the holes reserved on the concrete sections and sealed at the joints.

[0051] When using concrete materials with relatively low strength and cost, it can be considered to reinforce a layer of steel plate 23 outside the precast concrete structure of the pontoon 1 / wind turbine column 3 / heaving plate 2 to ensure its structural strength.

[0052] The heaving plate 2 is internally provided with a water tank.

[0053] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate all the details, nor limit the present invention to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An eccentric semi-submersible floating wind turbine steel-concrete platform, comprising a heave plate (2) and three groups of buoys (1) distributed in a triangular shape on the top of the heave plate (2), characterized in that: A fan column (3) located between the first and second groups of buoys (1) is also provided on the top of the heave plate (2), and the fan column (3) and the three groups of buoys (1) form a "T"-shaped distribution; The upper part of the fan column (3) and the upper part of each group of buoys (1) are connected via corresponding horizontal supports (4).

2. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: The three groups of buoys (1) are arranged in an equilateral triangle.

3. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: A wind turbine set (5) is installed on the wind turbine column (3).

4. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: A first reinforcement structure is provided at the junction between the lower part of the fan column (3) and the heave plate (2).

5. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: A second reinforcement structure is provided at the end of the horizontal support (4) between the third group of buoys (1) and the fan column (3).

6. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: The buoy (1) and the heave plate (2) are made of pure steel structure; or The buoy (1) adopts a pure steel structure, and the heave plate (2) adopts a prefabricated reinforced concrete structure.

7. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 1, characterized in that: The buoy (1), the fan column (3) and the heave plate (2) are prefabricated reinforced concrete structures; The buoy (1) and the fan column (3) are connected to the heave plate (2) via corresponding embedded parts; The outline size of the embedded part is compatible with the corresponding buoy (1) / fan column (3), the embedded part is embedded in the heave plate (2), and an anti-pullout part (11) with a widened area is fixedly arranged at the lower end of the embedded part.

8. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 7, characterized in that: The heave plates (2) comprise circular heave plates (21) and transverse heave plates (22); the circular heave plates (21) are arranged at the lower ends of the corresponding buoys (1), and the circular heave plates (21) are connected to each other via the transverse heave plates (22).

9. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 7, characterized in that: The outer surface of the buoy (1) and / or the heave plate (2) is covered with a layer of steel plate (23).

10. The eccentric semi-submersible floating wind turbine steel-concrete platform according to claim 7, characterized in that: The buoy (1) and the heave plate (2) are both provided with uniformly distributed prestressed steel bars.

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