Wind power floating foundation with double-stand-column structure

Abstract

The utility model provides a wind power floating foundation of a double-stand-column structure. The wind power floating foundation comprises a first stand column, a second stand column, a stand column connecting piece and a plurality of mooring chains. The mooring chains are connected to the bottom of the second stand column so that the second stand column can float in a designated sea area. The first stand column and the second stand column are arranged in parallel at intervals, the first end of the stand column connecting piece is connected to the circumferential side wall of the first stand column, the second end of the stand column connecting piece is rotationally connected to the second stand column, and the first stand column can rotate around the circumferential direction of the second stand column through the stand column connecting piece. The stand column connecting piece is located above the sea level. The fan tower drum is arranged on the top of the first stand column in the buoyancy direction. The problems that in the prior art, the anti-torque capacity is poor, the structure is complex, and cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the field of offshore wind power generation, in particular to a wind power floating foundation with a double-column configuration. Background Art

[0002] The existing offshore floating wind turbine platforms mainly include the three-column type with multi-point mooring and the single-point mooring type. Due to the characteristics of multi-point mooring, the wind turbine platform needs to directly face the action of wave and current loads, and is subject to large environmental loads, which will pose challenges to structural safety and cost control. Therefore, the single-point mooring type is the first choice in actual working conditions.

[0003] However, in the existing technology, the single-point mooring structure will be subject to a large torque when the wind and wave-current loads are in opposite directions, which is likely to have an adverse impact on the normal operation of the wind turbine. Moreover, many single-point mooring structures are directly converted from the existing three-column wind turbine foundations, with complex structures, high costs and inconvenient maintenance.

[0004] It can be seen that the single-point mooring structure in the existing technology has the defects of poor anti-torque ability, complex structure and high cost. Content of the Utility Model

[0005] The utility model provides a wind power floating foundation with a double-column configuration, which solves the problems of poor anti-torque ability, complex structure and high cost existing in the existing technology.

[0006] The utility model provides a wind power floating foundation with a double-column configuration, including a first column, a second column, a column connecting member and a plurality of mooring chains.

[0007] The plurality of mooring chains are connected to the bottom of the second column so that the second column floats in a designated sea area. The first column and the second column are arranged in parallel at intervals. The first end of the column connecting member is connected to the circumferential side wall of the first column, and the second end of the column connecting member is rotatably connected to the second column so that: the first column can rotate around the circumference of the second column through the column connecting member. Wherein, the column connecting member is above the sea level;

[0008] The wind turbine tower is arranged at the top of the first column along the buoyancy direction.

[0009] The wind power floating foundation with a double-column configuration of the present utility model can utilize the relative movement between the first column and the second column to reduce the torque received by the bearing platform (or can be understood as the first column) in the case of opposite directions of wind and wave-current loads because the first column can rotate circumferentially around the second column. This improves the anti-interference ability of the floating foundation, and has high stability and safety. Moreover, for the wind power floating foundation with a double-column configuration of the present utility model, since at least part of it is above the sea level, it can provide a relatively high hydrostatic restoring moment, further improving the anti-interference ability of the floating foundation. Further, the present utility model adopts a double-column structure. Compared with the traditional three-column or four-column configurations, on the one hand, it reduces the use of construction materials and has a low construction cost. On the other hand, the wet surface area of the bearing platform in the double-column configuration is relatively small. Therefore, under the same sea area conditions, the wave-current loads it receives are relatively small, which helps to further improve the stability and safety of the floating foundation.

[0010] Optionally, the wind power floating foundation with a double-column configuration further includes a connecting bearing. The interior of the second column is hollow, and the connecting bearing is arranged inside the second column. The second end of the column connecting member is installed on the connecting bearing to be rotatably connected to the second column.

[0011] Optionally, the column connecting member includes a horizontal connecting section and a bent connecting section.

[0012] The first end of the horizontal connecting section is connected to the circumferential side wall of the first column, the second end of the horizontal connecting section is connected to the first end of the bent connecting section, and the second end of the bent connecting section is connected to the second column. Among them, the cross-sectional diameter of the bent connecting section is smaller than the cross-sectional diameter of the second column.

[0013] In the embodiment of the present utility model, the horizontal connecting section and the bent connecting section of the column connecting member are used to singly connect the first column and the second column, which can effectively reduce the hydrodynamic loads. Moreover, while ensuring that the column connecting member is above the sea level, this structure takes into account the relative movement relationship between the first column and the second column, and has a simple structure and is convenient for maintenance.

[0014] Optionally, the cross-sectional shape of the bent connecting section is circular.

[0015] Optionally, the wind power floating foundation with a double-column configuration further includes a first floating body, a second floating body, a first connecting member, and a second connecting member.

[0016] The first end of the first connecting member is connected to the circumferential side wall of the first column, the second end of the first connecting member is rotatably connected to the first floating body, the first end of the second connecting member is connected to the circumferential side wall of the first column, and the second end of the second connecting member is rotatably connected to the second floating body, so that: the first floating body and the second floating body can rotate around their own axes under the drive of an external force.

[0017] The wind power floating foundation with a double-column configuration according to the embodiment of the present utility model can make the first column where the wind turbine is located rotate around the second column, fully utilize the weathervane effect of the single-point mooring, reduce the environmental loads on the wind turbine platform, and at the same time can effectively reduce the number of yaw operations, improve the stability of wind turbine power generation. In extreme environments, for example, when the wind turbine platform is subjected to lateral external loads and the first column turns to the longitudinal front direction, the first floating body and the second floating body can provide a restoring moment for it to ensure the stability of the wind turbine platform.

[0018] Optionally, along the extension direction of the column connecting member, the first floating body and the second floating body are symmetrically distributed on both sides of the column connecting member.

[0019] Optionally, the shortest connection line between the axis of the first floating body and the axis of the first column is the first connection line, and the shortest connection between the axis of the second floating body and the axis of the first column is the second connection line. The included angle between the first connection line and the second connection line facing the second column is the included angle A, and 90° ≤ included angle A ≤ 180°.

[0020] Through such a structure, the embodiment of the present utility model can make the restoring moment provided by the first floating body and the second floating body relatively large in extreme environments, for example, when the first column turns to the longitudinal front direction, which is beneficial to improving the stability and safety of the floating foundation in extreme environments.

[0021] Optionally, the cross-sectional shape of the first floating body and the second floating body is any one of the following: rectangular, rhombic, elliptical, water droplet-shaped, and streamlined.

[0022] Optionally, both the first connecting member and the second connecting member are L-shaped.

[0023] Optionally, multiple mooring chains are radially distributed at the bottom of the second column. Description of the Drawings

[0024] Figure 1 is a three-dimensional structural schematic diagram of the wind power floating foundation with a double-column configuration according to the embodiment of the present utility model;

[0025] Figure 2 is a partial cross-sectional structural schematic diagram of the wind power floating foundation with a double-column configuration according to the embodiment of the present utility model;

[0026] Figure 3 is a partial side-sectional structural schematic diagram of the wind power floating foundation with a double-column configuration according to the embodiment of the present utility model;

[0027] Figure 4 is a schematic diagram of the included angle A of the wind power floating foundation with a double-column configuration according to the embodiment of the present utility model;

[0028] Figure 5 is a side structural schematic diagram of the wind power floating foundation with a double-column configuration according to the embodiment of the present utility model Figure 1;

[0029] Figure 6 This is a schematic side view structure of the wind power floating foundation with a double-column configuration in the embodiment of the present utility model. Figure 2 。

[0030] Explanation of reference numerals in the drawings:

[0031] 1: Wind power floating foundation with a double-column configuration;

[0032] 11: First column; 12: Second column; 13: Column connector; 131: Horizontal connection section; 132: Bent connection section; 133: Transition section; 134: Vertical section; 135: Connection bearing;

[0033] 141: First floating body; 142: Second floating body; 143: First connector; 144: Second connector; L1: First connection line; L2: Second connection line;

[0034] 15: Mooring chain;

[0035] 2: Wind turbine tower. Detailed implementation manners

[0036] The present utility model will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model 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 utility model.

[0039] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0040] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0041] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe in detail the implementation manners of the present utility model with reference to the accompanying drawings.

[0042] Please refer to Figures 1 to 6 , the present utility model provides a wind power floating foundation 1 with a double-column configuration, including a first column 11, a second column 12, a column connector 13, and a plurality of mooring chains 15.

[0043] A plurality of mooring chains 15 are connected to the bottom of the second column 12 so that the second column 12 floats in a designated sea area. The first column 11 and the second column 12 are arranged side by side at intervals. The first end of the column connector 13 is connected to the circumferential side wall of the first column 11, and the second end of the column connector 13 is rotatably connected to the second column 12. The first column 11 can rotate around the circumference of the second column 12 through the column connector 13. Among them, the column connector 13 is located above the sea level.

[0044] The wind turbine tower 2 is arranged at the top of the first column 11 along the buoyancy direction (for example Figure 1 shown on the upper surface of the first column 11).

[0045] The floating wind power foundation 1 with a double-column configuration of the present utility model. Since the first column 11 can rotate circumferentially around the second column 12, therefore, in the case where the wind and wave-current loads are in opposite directions, the relative movement between the first column 11 and the second column 12 can be utilized to reduce the torque received by the bearing platform (or can be understood as the first column 11), improving the anti-interference ability of the floating foundation, and having relatively high stability and safety. Or it can be understood as: Since the floating wind power foundation 1 with a double-column configuration of the present utility model can make the first column 11 where the wind turbine is located rotate around the second column 12, fully utilizing the wind vane effect of single-point mooring, reducing the environmental loads received by the wind turbine platform, thus effectively reducing the number of yaw operations and improving the stability of wind turbine power generation. Moreover, for the floating wind power foundation 1 with a double-column configuration of the present utility model, since at least a part of it is located above the sea level, it can provide a relatively high hydrostatic restoring moment, further improving the anti-interference ability of the floating foundation. Further, the present utility model adopts a double-column structure. Compared with the traditional three-column or four-column configurations, on the one hand, the use of construction materials is reduced, and the construction cost is low. On the other hand, the wet surface area of the bearing platform in the double-column configuration is relatively small. Therefore, under the same sea area conditions, the wave-current loads it receives are relatively small, which helps to further improve the stability and safety of the floating foundation.

[0046] Those skilled in the art can understand that the wind vane effect refers to that an object adjusts its direction by rotating or swinging itself under the action of wind, so that its head is aligned with the source of the wind.

[0047] Wave-current loads, also known as hydrodynamic loads or wave loads, are the actions exerted by waves on structures in the ocean. Wave loads are caused by the relative movement between wave water particles and the structure.

[0048] The present utility model does not limit the rotational connection manner between the column connecting member 13 and the second column 12. In one embodiment, as Figure 2 and Figure 3 shown, the turret connection can be realized by using a bearing connection. Specifically, the floating wind power foundation 1 with a double-column configuration further includes a connecting bearing 135. The inside of the second column 12 is hollow, the connecting bearing 135 is arranged inside the second column 12, and the second end of the column connecting member 13 is installed on the connecting bearing 135 to be rotationally connected to the second column 12. In other alternative embodiments, it can also be other rotational connection manners. As long as it can make the first column 11 rotate circumferentially around the second column 12 through the column connecting member 13, it does not deviate from the scope of the embodiments of the present utility model.

[0049] Furthermore, there are no restrictions on the shapes of the first upright column 11, the second upright column 12, and the upright column connecting member 13 of the present utility model. For example, the first upright column 11 and the second upright column 12 can be cylindrical, rectangular columnar, etc. The upright column connecting member 13 can be, for example, arched, L-shaped, U-shaped, etc. In one embodiment, the upright column connecting member 13 includes a horizontal connecting section 131 and a bent connecting section 132.

[0050] Among them, the first end of the horizontal connecting section 131 is connected to the circumferential side wall of the first upright column 11, the second end of the horizontal connecting section 131 is connected to the first end of the bent connecting section 132, and the second end of the bent connecting section 132 is connected to the second upright column 12, for example, inside the connecting bearing 135 of the second upright column 12 (as Figure 3 shown), where the cross-sectional diameter of the bent connecting section 132 is smaller than the cross-sectional diameter of the second upright column 12. Among them, the bent connecting section 132 can be a right-angle bend or an arc bend. The present utility model does not limit this. In one embodiment, as Figure 5 and Figure 6 shown, the bent connecting section 132 is an arc bend, including a transition section 133 and a vertical section 134. Among them, the transition section 133 is connected between the horizontal connecting section 131 and the vertical section 134. One end of the vertical section 134 is connected to the transition section 133, and the other end is rotatably installed inside the second upright column 12, for example, inside the connecting bearing 135 inside the second upright column 12.

[0051] In one embodiment, the cross-sectional shapes of both the horizontal connecting section 131 and the bent connecting section 132 are circular. In other alternative embodiments, the horizontal connecting section 131 and the bent connecting section 132 can also be other shapes, such as rectangular, oval, etc. The cross-sectional shape of the horizontal connecting section 131 and the cross-sectional shape of the bent connecting section 132 can be the same or different.

[0052] In the embodiment of the present utility model, the horizontal connecting section 131 and the bent connecting section 132 of the upright column connecting member 13 are used to singly connect the first upright column 11 and the second upright column 12, which can effectively reduce the hydrodynamic load. Moreover, while ensuring that the upright column connecting member 13 is above sea level, this structure takes into account the relative motion relationship between the first upright column 11 and the second upright column 12, and has a simple structure and is convenient for maintenance.

[0053] Furthermore, please refer to Figure 1 , and in combination with Figure 5 and Figure 6 for understanding. In one embodiment, the floating wind power foundation 1 with a double-upright-column configuration further includes a first floating body 141, a second floating body 142, a first connecting member 143, and a second connecting member 144.

[0054] The first end of the first connecting member 143 is connected to the circumferential side wall of the first upright column 11, and the second end of the first connecting member 143 is rotatably connected to the first floating body 141. The first end of the second connecting member 144 is connected to the circumferential side wall of the first upright column 11, and the second end of the second connecting member 144 is rotatably connected to the second floating body 142, so that the first floating body 141 and the second floating body 142 can rotate around their own axes under the drive of an external force. The rotational connection structures of the first floating body 141 and the first connecting member 143 and of the second floating body 142 and the second connecting member 144 are not limited. They can be similar to the connection mode of the aforementioned upright column connecting member 13 and the second upright column 12, or other rotational connection structures can be adopted.

[0055] In the floating wind power foundation 1 with a double-upright-column configuration according to the embodiment of the present invention, the first upright column 11 where the wind turbine is located can rotate around the second upright column 12, making full use of the weathervane effect of the single-point mooring, reducing the environmental loads on the wind turbine platform, locking the minimum load, being very convenient for the load adjustment process, and at the same time being able to effectively reduce the number of yaw operations. Only the pitch of the wind turbine needs to be adjusted, improving the stability of the wind turbine power generation. On this basis, the first floating body 141 and the second floating body 142 are provided, so that in an extreme environment, for example, when the wind turbine platform is subjected to a lateral external load and the first upright column 11 turns to the longitudinal front direction, the first floating body 141 and the second floating body 142 can provide a restoring moment for it to ensure the stability of the wind turbine platform.

[0056] Among them, the positions of the first floating body 141 and the second floating body 142 are not limited. As long as they are arranged on the circumferential outer side of the first upright column 11 through the first connecting member 143 and the second connecting member 144, they do not deviate from the scope of the embodiment of the present invention. In one embodiment, along the extension direction of the upright column connecting member 13, the first floating body 141 and the second floating body 142 are symmetrically distributed on both sides of the upright column connecting member 13. In a further embodiment, as Figure 4 shown, the shortest connection line between the axis of the first floating body 141 and the axis of the first upright column 11 is the first connection line L1, and the shortest connection line between the axis of the second floating body 142 and the axis of the first upright column 11 is the second connection line L2. The included angle between the first connection line L1 and the second connection line L2 facing the second upright column 12 is the included angle A, and 90° ≤ included angle A ≤ 180°. Such a structure can make the restoring moment provided by the first floating body 141 and the second floating body 142 relatively large in an extreme environment, for example, when the first upright column 11 turns to the longitudinal front direction, which is beneficial to improving the stability and safety of the floating foundation in an extreme environment.

[0057] In one embodiment, the included angle A is 180°. Such a structure can also be understood as arranging the first floating body 141 and the second floating body 142 in opposite and corresponding manners, and the connection line between the two is perpendicular to the extension direction of the column connecting member 13. Such a structure can make the restoring moment provided by the first floating body 141 and the second floating body 142 the largest under extreme conditions, for example, when the first column 11 turns to the longitudinal front direction, and the stability and safety are the best.

[0058] Those skilled in the art can understand that the cross-sectional shapes of the first floating body 141 and the second floating body 142 can be rectangular, rhombic, elliptical, water droplet-shaped or streamlined, and the present utility model does not make any limitations thereto. Further, the shapes of the first connecting member 143 and the second connecting member 144 can be, for example, L-shaped, U-shaped, arc-shaped, arched and so on.

[0059] In one embodiment, a plurality of mooring chains 15 are radially distributed at the bottom of the second column 12. The number of the mooring chains 15 is not limited, and can be, for example, 3, 5, 7 or other numbers.

[0060] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present application based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A floating wind power foundation with a double-column configuration, characterized in that, It includes a first column, a second column, a column connecting member, and multiple mooring chains; The multiple mooring chains are connected to the bottom of the second column so that the second column floats in a specified sea area; the first column and the second column are arranged side by side at intervals, the first end of the column connecting member is connected to the circumferential side wall of the first column, and the second end of the column connecting member is rotatably connected to the second column, so that: the first column can rotate circumferentially around the second column through the column connecting member; wherein, the column connecting member is above the sea level; The wind turbine tower is arranged at the top of the first column along the buoyancy direction.

2. The floating wind power foundation with a double-column configuration according to claim 1, characterized in that, It further includes a connecting bearing. The inside of the second column is hollow, the connecting bearing is arranged inside the second column, and the second end of the column connecting member is installed on the connecting bearing to be rotatably connected to the second column.

3. The floating wind power foundation with a double-column configuration according to claim 2, characterized in that, The column connecting member includes a horizontal connecting section and a bent connecting section; The first end of the horizontal connecting section is connected to the circumferential side wall of the first column, the second end of the horizontal connecting section is connected to the first end of the bent connecting section, and the second end of the bent connecting section is connected to the second column. Wherein, the cross-sectional diameter of the bent connecting section is smaller than the cross-sectional diameter of the second column.

4. The floating wind power foundation with a double-column configuration according to claim 3, characterized in that, The cross-sectional shape of the bent connecting section is circular.

5. The floating wind power foundation with a double-column configuration according to claim 1, characterized in that, It further includes a first floating body, a second floating body, a first connecting member, and a second connecting member; The first end of the first connecting member is connected to the circumferential side wall of the first column, the second end of the first connecting member is rotatably connected to the first floating body, the first end of the second connecting member is connected to the circumferential side wall of the first column, and the second end of the second connecting member is rotatably connected to the second floating body, so that: the first floating body and the second floating body can rotate around their own axes under the drive of an external force.

6. The floating wind power foundation with a double-column configuration according to claim 5, characterized in that, Along the extending direction of the column connecting member, the first floating body and the second floating body are symmetrically distributed on both sides of the column connecting member.

7. The floating wind power foundation with a double-column configuration according to claim 5, characterized in that, The shortest connecting line between the axis of the first floating body and the axis of the first column is the first connecting line, the shortest connecting line between the axis of the second floating body and the axis of the first column is the second connecting line, and the included angle between the first connecting line and the second connecting line facing the second column is included angle A, 90° ≤ included angle A ≤ 180°.

8. The floating wind power foundation with a double-column configuration according to claim 5, characterized in that, The cross-sectional shapes of the first floating body and the second floating body are any one of the following: rectangle, rhombus, ellipse, water droplet shape, streamline shape.

9. The floating wind power foundation with a double-column configuration according to claim 5, characterized in that, Both the first connecting member and the second connecting member are in an L shape.

10. The floating wind power foundation with a double-column configuration according to claim 1, characterized in that, The multiple mooring chains are radially distributed at the bottom of the second column.

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