Floating type wind power concrete foundation structure

Abstract

The utility model discloses a floating type wind power concrete foundation structure which comprises a floating type foundation and a fan. The floating type foundation comprises a main buoy, a first auxiliary buoy, a second auxiliary buoy and a third auxiliary buoy, the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected with one another and arranged in a triangular shape, and the main buoy is connected with the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy. The main buoy is arranged between the first auxiliary buoy and the second auxiliary buoy; the draught fan is installed on the main buoy so as to be assembled with the floating type foundation. The device has the advantages of simple structure, compact matching, reasonable design and the like; therefore, the device is a product with excellent technical and economical performance.

Description

[Technical field]

[0001] The utility model mainly relates to a floating wind power concrete foundation structure. [Background technology]

[0002] With the development of the wind power industry, the application of offshore floating wind power is increasing, the capacity of a single unit is increasing, and the cost of floating foundation is also increasing. According to research, the foundation cost of existing floating wind turbines accounts for about 40% of the total cost of the whole unit. Therefore, it is urgent to explore more suitable structural forms and more suitable material types for floating foundations, to increase the capacity of a single unit and reduce the cost of a single unit as much as possible, so as to promote the development and growth of wind power green energy.

[0003] The existing offshore floating wind power has the following disadvantages: 1. The foundation cost is high. The floating foundation is entirely made of steel structure, and the material cost and anti-corrosion maintenance cost are high. 2. The existing foundation configuration cannot install external cables on the tower due to the interference of the blades, the tower bending moment is large, and the tower cost is high. [Utility Model Content]

[0004] In order to solve at least one of the above problems, the utility model proposes a new structural solution. The floating wind power concrete foundation structure adopts the following technical solutions:

[0005] A floating wind power concrete foundation structure, comprising a floating foundation and a wind turbine;

[0006] The floating foundation comprises a main buoy, a first auxiliary buoy, a second auxiliary buoy and a third auxiliary buoy, wherein the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected to each other and arranged in a triangular shape, the main buoy is connected to the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy respectively, and the main buoy is arranged between the first auxiliary buoy and the second auxiliary buoy;

[0007] The wind turbine is installed on the main buoy to be assembled with the floating foundation.

[0008] Preferably, the wind turbine comprises a tower and a blade assembly, the bottom end of the tower is a tower base section, and the tower base section is connected to the main buoy.

[0009] Preferably, the tower, the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected to each other via external cables.

[0010] Preferably, the main buoy, the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected by a parallel steel frame.

[0011] Compared with the background technology, the utility model has the following beneficial effects:

[0012] The above technical solution adopted in this floating wind power concrete foundation structure has the following advantages: 1. UHPC concrete material is introduced in the manufacture of the pontoon. The pontoon is a fully compressed structure, and the concrete material is just suitable for compression. Compared with the existing steel structure pontoon, it can save 40% of the material cost. 2. The modular design, segmented prefabrication and assembly installation of the concrete pontoon can increase the foundation bearing capacity by increasing the number of pontoon layers, and connect each layer into a whole through vertical prestressing. The design is flexible and the construction is convenient, which can meet the bearing capacity requirements of different single-unit capacities. 3. The bottom section of the tower is also made of concrete material, which can increase the stiffness of the tower and reduce the material cost. 4. The foundation configuration of the present invention can provide conditions for the installation of external cables of the tower to avoid interference between the external cables and the blades. The external cables can reduce the force on the tower by about 30%, reducing the cost of the tower.

Brief Description of the Drawings

[0013] Figure 1 A schematic diagram of a floating wind power concrete foundation structure from a first perspective in a preferred embodiment of the present utility model;

[0014] Figure 2 A second perspective schematic diagram of a floating wind power concrete foundation structure in a preferred embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of a floating foundation in a preferred embodiment of the present utility model. [Specific implementation method]

[0016] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0017] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, but cannot be understood as limiting the utility model.

[0019] The preferred embodiment provided by the utility model is as follows: Figure 1 to Figure 3As shown, a floating wind power concrete foundation structure comprises a floating foundation 1 and a wind turbine 2;

[0020] The floating foundation 1 includes a main buoy 11, a first auxiliary buoy 12, a second auxiliary buoy 13 and a third auxiliary buoy 14. The first auxiliary buoy 12, the second auxiliary buoy 13 and the third auxiliary buoy 14 have the same structural features. The first auxiliary buoy 12, the second auxiliary buoy 13 and the third auxiliary buoy 14 are interconnected and arranged in a triangular shape. The main buoy 11 is connected to the first auxiliary buoy 12, the second auxiliary buoy 13 and the third auxiliary buoy 14 respectively, and the main buoy 11 is arranged between the first auxiliary buoy 12 and the second auxiliary buoy 13; the main buoy 11, the first auxiliary buoy 12, the second auxiliary buoy 13 and the third auxiliary buoy 14 are connected by a parallel steel frame, and the parallel steel frame is composed of a plurality of steel rods connected to each other in an interlaced manner; the buoy adopts the existing buoy structure for offshore floating wind power.

[0021] The wind turbine 2 is installed on the main buoy 11 to be assembled with the floating foundation 1 .

[0022] The wind turbine 2 comprises a tower 21 and a blade assembly 22. The bottom end of the tower 21 is a tower base section 23, and the tower base section 23 is connected to the main buoy 11. The tower 21 is connected to each auxiliary buoy via an external cable 24.

[0023] The existing offshore floating wind power has the following disadvantages: 1. The foundation cost is high. The floating foundation is entirely made of steel structure, and the material cost and anti-corrosion maintenance cost are high. 2. The existing foundation configuration cannot install external cables on the tower due to the interference of the blades, the tower bending moment is large, and the tower cost is high.

[0024] To solve the above problems, the utility model proposes a floating wind power concrete foundation structure, which includes a floating foundation 1 and a wind turbine 2, wherein the floating foundation 1 is composed of four pontoons, three corner points are auxiliary pontoons, and a midpoint of a side line is a main pontoon 11, and the pontoons are connected by steel frames.

[0025] The pontoon is a UHPC prestressed concrete cylindrical structure, which is divided into multiple sections in the height direction. Prestressed tendons are arranged vertically on the cylinder wall to connect the multiple layers of ring blocks into a whole.

[0026] The tower base section 23 also adopts a UHPC prestressed concrete cylindrical structure and is connected to the main buoy 11 as a whole. The diameter and wall thickness of the tower base section 23 gradually decrease to facilitate connection with the steel structure section of the tower 21.

[0027] The auxiliary buoy has a reserved anchor point for the outer cable 24 of the tower 21, and the outer cable 24 is arranged at the top of the tower 21 and anchored on the top surface of the auxiliary buoy. Since the main buoy 11, the tower 21 and the auxiliary buoys on both sides are in the same plane, the blades will not interfere with the outer cable 24 when the blades are operating normally.

[0028] The floating foundation 1 is fixed in the sea by an anchor chain, and the anchor chain fixing point is at the bottom of the remote auxiliary buoy. The wind turbine 2 as a whole can rotate around the fixing point. How to ensure that the blade direction is always in the windward direction, and the wind direction is from the remote auxiliary buoy to the main buoy 11, and the external cable 24 is always in an effective state.

[0029] The above technical solution adopted in this floating wind power concrete foundation structure has the following advantages: 1. UHPC concrete material is introduced in the manufacture of the pontoon. The pontoon is a fully compressed structure, and the concrete material is just suitable for compression. Compared with the existing steel structure pontoon, it can save 40% of the material cost. 2. The modular design, segmented prefabrication and assembly installation of the concrete pontoon can increase the foundation bearing capacity by increasing the number of pontoon layers, and connect each layer into a whole through vertical prestressing. The design is flexible and the construction is convenient, which can meet the bearing capacity requirements of different single-unit capacities. 3. The bottom section of the tower is also made of concrete material, which can increase the stiffness of the tower and reduce the material cost. 4. The foundation configuration of the present invention can provide conditions for the installation of external cables of the tower to avoid interference between the external cables and the blades. The external cables can reduce the force on the tower by about 30%, reducing the cost of the tower.

[0030] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A floating wind power concrete foundation structure, characterized in that: It includes a floating foundation and wind turbines; The floating foundation comprises a main buoy, a first auxiliary buoy, a second auxiliary buoy and a third auxiliary buoy, wherein the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected to each other and arranged in a triangular shape, the main buoy is connected to the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy respectively, and the main buoy is arranged between the first auxiliary buoy and the second auxiliary buoy; The wind turbines are mounted on the main buoy to be assembled with the floating foundation.

2. A floating wind power concrete foundation structure according to claim 1, characterized in that: The wind turbine comprises a tower and a blade assembly. The bottom end of the tower is a tower base section, and the tower base section is connected to a main buoy.

3. A floating wind power concrete foundation structure according to claim 2, characterized in that: The tower, the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected to each other through external cables.

4. The floating wind power concrete foundation structure according to claim 1, characterized in that: The main buoy, the first auxiliary buoy, the second auxiliary buoy and the third auxiliary buoy are connected by a parallel steel frame.

Images