Single-point mooring construction method for floating type offshore wind turbine

Abstract

The invention discloses a single-point mooring construction method for a floating type offshore wind turbine. According to the mooring construction method, a floating foundation is constructed to present single end stress limitation, and buoyancy is provided for the offshore wind turbine. The six anchor chains are used for mooring the turret buoy to limit the stress of the single end of the floating foundation, and when the floating foundation is vertically impacted by fluid such as sea waves or sea wind, the floating foundation providing buoyancy rotates around the single point of the turret buoy to adjust and change the posture. At the moment, the side edge of the Y-shaped floating foundation is not perpendicular to the collision direction of fluid such as sea waves or sea wind, collision between the floating foundation and the fluid such as sea waves or sea wind is relieved, and the problem that three corners of the floating foundation are moored and limited respectively, and the posture direction cannot be changed to relieve collision between the floating foundation and the fluid is solved.

Description

Technical Field

[0001] This invention relates to a single-point mooring construction method for floating offshore wind turbines, belonging to the field of offshore wind turbine mooring technology. Background Technology

[0002] my country's offshore wind power development has received strong support and achieved rapid progress. Offshore wind turbines have evolved from shallow to deep sea and from fixed to floating. Floating offshore wind power requires the floating foundation to be moored on the sea surface, and the wind turbine to be installed on the floating foundation.

[0003] Existing floating offshore wind turbine technology, as described in Chinese Patent Publication No. CN212337538U, involves three corners of the floating foundation being connected to mooring anchors on the seabed via mooring chains. While this allows for mooring of the floating foundation, it cannot change its orientation to mitigate the impact when waves or winds collide vertically with it. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a single-point mooring construction method for floating offshore wind turbines.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides a single-point mooring construction method for a floating offshore wind turbine, comprising: A mooring construction method that constructs floating foundations, presenting a single-end force constraint and providing buoyancy for offshore wind turbines.

[0007] The mooring construction method includes: The suction anchor is fixedly embedded in the seabed. The suction anchor is connected to the turret buoy through the anchor chain assembly. The individual end of the floating foundation can be rotatably installed with the turret buoy.

[0008] The floating foundation is Y-shaped.

[0009] It also includes offshore wind turbines; when the offshore wind turbines are fixedly installed on the top of the turret pontoons, the floating foundation provides a buoyancy foundation for the offshore wind turbines. The floating foundation is rotatably installed on the outside of the turret pontoons via bearings. When the floating foundation is vertically subjected to fluid impact force, the floating foundation rotates around the turret pontoons to change its attitude and direction. It also includes offshore wind turbines; when the offshore wind turbines are fixedly installed on the floating foundation, the floating foundation provides buoyancy for the offshore wind turbines. The foundation is rotatably installed on the outside of the turret float via bearings. When the floating foundation is subjected to fluid impact force vertically, the floating foundation carries the offshore wind turbine and rotates around the turret float to change its attitude and direction.

[0010] At both ends of the top surface of the floating foundation, which is far from the turret pontoon, counterweight pontoons are fixedly installed. The counterweight pontoons can hold counterweights, and the counterweights inside the pontoons are used to control and balance the load of the offshore wind turbine. This ensures that the floating foundation triangle remains horizontal and is pressed below the sea surface for a stable draft under the load of the offshore wind turbine and the two counterweight pontoons.

[0011] The anchor chain assembly includes six anchor chains: anchor chain A, anchor chain B, anchor chain C, anchor chain D, anchor chain E, anchor chain F, and anchor chain G. The six suction anchors correspond to the six anchor chains.

[0012] Anchor chains A and B form the first group, anchor chains D and E form the second group, and anchor chains F and G form the third group. The second and third groups are distributed on both sides of the first group at an arc angle of 112°, and the arc angle between the second and third groups is 101°. The anchor chains in the first, second, and third groups are spaced at an arc angle of 8°. One end of each of the six anchor chains is moored to six locations outside the turret buoy, and the other end of each anchor chain is moored to its corresponding suction anchor.

[0013] The beneficial effects of this invention are as follows: the six anchor chains moor the turret buoy to restrict the force on a single end of the floating foundation. When the floating foundation is subjected to vertical impact from fluids such as waves or sea winds, the floating foundation, which provides buoyancy, rotates around a single point on the turret buoy to adjust and change its attitude. At this time, the side of the Y-shaped floating foundation is not perpendicular to the direction of impact from the waves or sea winds, thus alleviating the impact between the floating foundation and the fluids. This solves the problem that the floating foundation is moored and limited at its three corners, making it impossible to change its attitude to alleviate the impact with the fluid. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of the floating foundation, anchor chain assembly, and turret pontoon of the present invention; Figure 2 This is a top view schematic diagram of the distribution of the offshore wind turbines installed on the turret pontoons of this invention; Figure 3 This is a top view schematic diagram of the distribution of the offshore wind turbines of the present invention installed on a floating foundation; Figure 4 This is a front view schematic diagram of the sea-floating foundation of the present invention; In the diagram: 1-Suction anchor; 2-Seabed; 21-Sea surface; 3-Floating foundation; 4-Anchor chain assembly; 41-Anchor chain A; 42-Anchor chain B; 43-Anchor chain C; 44-Anchor chain D; 45-Anchor chain E; 46-Anchor chain F; 47-Anchor chain G; 5-Turret buoy; 51-Counterweight buoy; 6-Offshore wind turbine. Detailed Implementation

[0015] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0016] like Figures 1 to 4 As shown.

[0017] This application discloses a single-point mooring construction method for a floating offshore wind turbine, comprising: The suction anchor 1 is fixed and embedded in the seabed 2 by hammering or negative pressure, and the suction anchor 1 is connected to the turret buoy 5 through the anchor chain assembly 4.

[0018] A floating base 3 is rotatably mounted on the turret float 5 via bearings or clearance fit. The floating base 3 is Y-shaped. Figure 1 As shown.

[0019] It also includes an offshore wind turbine 6; when the offshore wind turbine 6 is fixedly installed on the top of the turret pontoon 5, the floating foundation 3 provides a buoyancy foundation for the offshore wind turbine 6. The floating foundation 3 is rotatably installed on the outside of the turret pontoon 5 via bearings. When the floating foundation 3 is subjected to the impact force of fluids such as waves or sea winds, the floating foundation 3 rotates around the turret pontoon 5 to change its attitude and direction, such as... Figure 3 As shown; When the offshore wind turbine 6 is fixedly installed on the floating foundation 3, the floating foundation 3 provides buoyancy for the offshore wind turbine 6. The foundation 3 is rotatably installed on the outside of the turret float 5 via bearings. When the floating foundation 3 is subjected to the impact force of fluids such as waves or sea winds, the floating foundation 3, along with the offshore wind turbine 6, rotates around the turret float 5 to change its attitude and direction. Figure 2 As shown.

[0020] At both ends of the top surface of the floating foundation 3, which is far from the turret pontoon 5, counterweight pontoons 51 are fixedly installed. The counterweight pontoons 51 can hold sea sand or other counterweights. The counterweights in the counterweight pontoons 51 are used to control and balance the load of the offshore wind turbine 6. Under the load of the offshore wind turbine 6 and the two counterweight pontoons 51, the floating foundation 3 is kept in a horizontal state and pressed below the sea surface 21 for stable draft. The floating foundation 3 will not tilt or tilt.

[0021] The anchor chain assembly 4 includes six anchor chains: anchor chain A41, anchor chain B42, anchor chain C43, anchor chain D44, anchor chain E45, anchor chain F46, and anchor chain G47. There are six suction anchors 1 corresponding to the six anchor chains. Anchor chains A41 and B42 form the first group, anchor chains D44 and E45 form the second group, and anchor chains F46 and G47 form the third group. The second and third groups are distributed on either side of the first group at an arc angle of 112°, and the arc angle between the second and third groups is 101°. The anchor chains in the first, second, and third groups are spaced at an arc angle of 8°. One end of each of the six anchor chains is moored to six points around the outer edge of the turret buoy 5, and the other end of each anchor chain is moored to its corresponding suction anchor 1.

[0022] Six anchor chains moor the turret buoy 5 to restrict the force on a single end of the floating foundation 3. When the floating foundation 3 is impacted vertically by waves or sea winds, the floating foundation 3, which provides buoyancy, rotates around the turret buoy 5 to adjust and change its attitude. At this time, the side of the Y-shaped floating foundation 3 is not perpendicular to the direction of impact of waves or sea winds, which alleviates the impact of the floating foundation 3 with waves or sea winds. This solves the problem that the three corners of the floating foundation are moored and limited, and cannot change their attitude to alleviate the impact with the fluid.

[0023] The turret buoy 5 can be set below the floating base 3, and the turret buoy 5 is positioned within the sea surface 21 below the floating base 3 by adjusting its own counterweight.

Claims

1. A single-point mooring construction method for a floating offshore wind turbine, characterized in that, include: Constructing a floating foundation (3) presents a mooring construction method that restricts the force at a single end and provides buoyancy for the offshore wind turbine (6).

2. The single-point mooring construction method for floating offshore wind turbines as described in claim 1, characterized in that, The mooring construction method includes: The suction anchor (1) is fixedly embedded in the seabed (2). The suction anchor (1) is connected to the turret buoy (5) through the anchor chain assembly (4). The single end of the floating base (3) is rotatably installed with the turret buoy (5).

3. The single-point mooring construction method for floating offshore wind turbines as described in claim 2, characterized in that: The floating foundation (3) is Y-shaped.

4. The single-point mooring construction method for floating offshore wind turbines as described in claim 2, characterized in that: It also includes an offshore wind turbine (6); when the offshore wind turbine (6) is fixedly installed on the top of the turret pontoon (5), the floating foundation (3) provides a buoyancy foundation for the offshore wind turbine (6). The floating foundation (3) is rotatably installed on the outside of the turret pontoon (5) through bearings. When the floating foundation (3) is subjected to the fluid impact force vertically, the floating foundation (3) rotates around the turret pontoon (5) to change its attitude direction.

5. The single-point mooring construction method for floating offshore wind turbines as described in claim 2, characterized in that: It also includes an offshore wind turbine (6); when the offshore wind turbine (6) is fixedly installed on the floating foundation (3), the floating foundation (3) provides a buoyancy foundation for the offshore wind turbine (6). The foundation (3) is rotatably installed on the outside of the turret float (5) through bearings. When the floating foundation (3) is subjected to the fluid impact force vertically, the floating foundation (3) carries the offshore wind turbine (6) and rotates around the turret float (5) to change its attitude direction.

6. The single-point mooring construction method for floating offshore wind turbines as described in claim 4 or 5, characterized in that: At both ends of the top surface of the floating foundation (3) away from the turret pontoon (5), counterweight pontoons (51) are fixedly installed. The counterweight pontoons (51) can hold counterweights. The counterweights in the counterweight pontoons (51) are used to control and balance the load of the offshore wind turbine (6), so that the floating foundation (3) triangle is in a horizontal state and pressed below the sea surface (21) for stable draft under the load of the offshore wind turbine (6) and the two counterweight pontoons (51).

7. The single-point mooring construction method for floating offshore wind turbines as described in claim 2, characterized in that: The anchor chain assembly (4) includes six anchor chains, namely anchor chain A (41), anchor chain B (42), anchor chain C (43), anchor chain D (44), anchor chain E (45), anchor chain F (46), and anchor chain G (47), and the suction anchor (1) consists of six anchor chains corresponding to the six anchor chains.

8. The single-point mooring construction method for floating offshore wind turbines as described in claim 7, characterized in that: The anchor chains A (41) and B (42) form the first group, the anchor chains D (44) and E (45) form the second group, and the anchor chains F (46) and G (47) form the third group. The second and third groups are distributed on both sides of the first group at an arc angle of 112°, and the arc angle between the second and third groups is 101°. The anchor chains of the first, second, and third groups are separated by an arc angle of 8°. One end of each of the six anchor chains is moored to six points outside the turret buoy (5), and the other end of each anchor chain is moored to its corresponding suction anchor (1).

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