Inverted triangular pyramid type semi-submersible floating fan foundation structure

Abstract

According to the technical scheme, the inverted triangular pyramid type semi-submersible floating type draught fan foundation structure comprises inclined cylindrical buoys located at three angular points of a regular triangle, the adjacent inclined cylindrical buoys are connected through rectangular box girders, cake-shaped buoyancy tanks are arranged below the rectangular box girders, a center stand column is arranged in the center of the triangle, and the center stand column is connected with the inclined cylindrical buoys. The center stand column is connected to the oblique cylindrical buoys through the inner side oblique supporting rod system, and the bottom of the center stand column is connected to the oblique cylindrical buoys through the inner side horizontal rod system. Compared with a traditional semi-submersible floating type wind power foundation, the semi-submersible floating type wind power foundation has the advantages that the waterline area is larger, the structure has better stability, the steel consumption is lower, a certain wind wave damper effect is achieved, and the wave frequency motion of the structure under the extreme working condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, in particular to an inverted triangular platform type semi-submersible floating wind turbine foundation structure. Background Art

[0002] The statements in this section merely mention the background technology related to the present utility model and do not necessarily constitute the prior art.

[0003] As a green and renewable form of energy, offshore wind power has many advantages. First, offshore wind energy has great potential and relatively stable wind speed, which is suitable for wind power generation. Secondly, compared with land wind power, offshore wind power does not need to occupy large areas of land, which helps to protect the natural ecology. In addition, offshore wind power stations usually face stronger wind speeds, so the utilization rate of wind energy is higher. Most importantly, offshore wind power avoids the impact on the visual environment of residents and does not damage the scenery. In short, offshore wind power is an important direction for the development of clean energy in the future.

[0004] As offshore wind farms gradually move towards deep sea development, floating offshore wind turbines have become one of the important technologies for offshore wind farms due to the high cost of offshore construction of fixed wind turbines commonly used in offshore wind farms and the great influence of seabed topography and undercurrents. The floating wind power foundation structure is a key component that supports the wind turbine tower in deep sea. It allows wind turbines to be installed in deep waters, thereby maximizing the potential of offshore wind energy.

[0005] At present, tension leg type and Spar type floating wind power foundation structures are widely used in the field of offshore wind power. However, these two structures have some limitations. The tension leg type floating wind power foundation requires a complex tension mooring system and has high installation costs. In addition, the tension leg type foundation is easily affected by the ocean current, which affects the structural stability. The Spar type floating wind power foundation requires a special installation ship, which increases the difficulty and cost of installation. Its mooring and anchoring system is complex and expensive, and the maintenance risk is high when the mooring fails. Utility Model Content

[0006] In order to address the deficiencies of the prior art, the utility model provides an inverted triangular platform-type semi-submersible floating wind turbine foundation structure, the purpose of which is to reduce the impact of wind and waves on the anchoring system, improve the overall stability of the structure, and reduce the cost and risk of operating and maintaining the mooring system.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] An inverted triangular prism-type semi-submersible floating wind turbine foundation structure comprises oblique cylindrical pontoons located at three corner points of an equilateral triangle, adjacent oblique cylindrical pontoons are connected by a rectangular box beam, a pancake-shaped pontoon is arranged below the rectangular box beam, a central column is arranged at the center of the triangle, the central column is connected to each oblique cylindrical pontoon through an inner oblique support rod system, the bottom is connected to each oblique cylindrical pontoon through an inner horizontal rod system, and each oblique cylindrical pontoon is connected to a mooring system.

[0009] As an implementation mode, the oblique cylindrical buoys located at the three corner points of the equilateral triangle are in the shape of an inverted triangular pyramid as a whole.

[0010] As an embodiment, the basic structure further includes an outer horizontal bar system, and the bottoms of the oblique cylindrical pontoons are connected via the outer horizontal bar system.

[0011] As an implementation method, the planes where the inner horizontal bar system and the outer horizontal bar system are located are parallel to each other, and the cross-sections of both are circular tube structures.

[0012] As an implementation mode, the rectangular box girder has a rectangular cross-section, a width that is 1 / 3 of the diameter of the oblique cylindrical pontoon, and is connected to the oblique cylindrical pontoon.

[0013] As an implementation manner, the horizontal cross-section of the oblique cylindrical buoy is circular, and the cross-section perpendicular to the axis of the oblique cylindrical buoy is elliptical.

[0014] As an embodiment, the horizontal cross-section of the pancake-shaped pontoon is a circular closed structure with a diameter 1.5-1.7 times the diameter of the oblique cylindrical pontoon and a width 1 / 4-1 / 3 of the diameter of the oblique cylindrical pontoon, and is located 1-5 meters below the rectangular box girder.

[0015] As an implementation mode, the top of the central column is connected to the wind turbine tower.

[0016] As an implementation mode, the bottoms of the oblique cylindrical pontoons are interconnected through an outer horizontal rod system, and the angle between the structural axis of the oblique cylindrical pontoons and the horizontal plane is 120-150°.

[0017] As an implementation method, the centers of the oblique cylindrical buoys are connected to form an equilateral triangle.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model has low requirements on the water depth of the working environment, does not require complex mooring or anchoring systems, reduces the impact of wind and waves on the anchoring system, improves the overall stability of the structure, and reduces the cost and risk of mooring system operation and maintenance;

[0020] 2. The utility model can be transported to the wind farm site after being assembled at the dock, without the need for a special installation ship, which greatly reduces the installation cost;

[0021] 3. Compared with the traditional semi-submersible floating wind power foundation, the utility model has a larger waterline area, better structural stability, lower steel consumption, and a certain wind and wave damper effect, reducing the wave frequency movement of the structure under extreme working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] Figure 1 A three-dimensional diagram of an inverted triangular platform-type semi-submersible floating wind turbine foundation structure provided by an embodiment of the utility model;

[0024] Figure 2 A front view of an inverted triangular platform-type semi-submersible floating wind turbine foundation structure provided by an embodiment of the utility model;

[0025] Figure 3 A top view of an inverted triangular prism-type semi-submersible floating wind turbine foundation structure provided by an embodiment of the utility model;

[0026] Among them, 1-central column; 2-corner inclined cylindrical pontoon; 3-rectangular box girder; 4-corner pancake pontoon; 5-diagonal bracing bar system; 6-inner horizontal bar system; 7-outer horizontal bar system. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0028] It should be noted that the utility model is a construction scheme. As for the various equipment units involved therein, the specific structures for realizing the functions they should realize already exist in the prior art, and the protocols, software or programs involved in the work processing therebetween also already exist in the prior art. Those skilled in the art are fully aware that the utility model does not make any improvements to the units of each device, and therefore does not involve the content of the software, but relies on the organic integration of various components into a whole, that is, providing a construction scheme.

[0029] The traditional tension leg floating wind power foundation requires a complex tension mooring system, which has high installation costs. Moreover, the tension leg foundation is easily affected by the ocean current, which affects the stability of the structure. The Spar floating wind power foundation requires a special installation ship, which increases the difficulty and cost of installation. Its mooring and anchoring system is complex and expensive, and the maintenance risk is high when the mooring fails. The utility model provides an inverted triangular prism-shaped semi-submersible floating wind power foundation platform, which is connected to the anchoring system, has low requirements for the water depth of the working environment, does not require a complex mooring or anchoring system, reduces the impact of wind and waves on the anchoring system, improves the overall stability of the structure, and reduces the cost and risk of mooring system operation and maintenance.

[0030] like Figure 1 The figure shows an inverted triangular prism type semi-submersible floating wind turbine foundation structure, including oblique cylindrical pontoons 2 located at the three corner points of an equilateral triangle, adjacent oblique cylindrical pontoons 2 are connected by an outer rectangular box beam 3, a pie-shaped pontoon 4 is arranged below the outer rectangular box beam 3, a central column 1 is arranged at the center of the triangle, the central column 1 is connected to each oblique cylindrical pontoon 2 through an inner oblique support rod system 5, and the bottom is connected to each oblique cylindrical pontoon 2 through an inner horizontal rod system 6, and each oblique cylindrical pontoon is connected to a mooring system.

[0031] The advantage of the above scheme is that compared with the traditional semi-submersible floating wind turbine foundation, it has a larger waterline area, the structure has better stability, uses less steel, and has a certain wind and wave damper effect, reducing the wave frequency movement of the structure under extreme working conditions.

[0032] In this embodiment, the fan foundation structure is in the shape of an inverted triangular prism.

[0033] Furthermore, the basic structure also includes an outer horizontal rod system, and the bottoms of the oblique cylindrical buoys 2 are connected through the outer horizontal rod system.

[0034] In this embodiment, the planes on which the inner horizontal bar system 6 and the outer horizontal bar system 7 are located are parallel to each other, and the cross-sections of both are circular tube structures.

[0035] In this embodiment, the outer rectangular box beam 3 has a rectangular cross-section and a width that is 1 / 3 of the diameter of the corner oblique cylindrical buoy, and is connected to the corner oblique cylindrical buoy 2.

[0036] In this embodiment, the oblique cylindrical pontoon 2 has a circular horizontal cross section and an elliptical cross section perpendicular to the axis of the oblique cylindrical pontoon, and is used as a ballast tank and a floating body void tank, and is connected to a mooring system. The bottoms of the three oblique cylindrical pontoons are interconnected through an outer horizontal rod system 7, and the angle between the structural axis and the horizontal plane is 120-150°. The centers of the three oblique cylindrical pontoons are connected to form an equilateral triangle.

[0037] In this embodiment, the pancake-shaped pontoon 4 has a circular closed structure with a horizontal cross-section, a diameter of 1.5-1.7 times the diameter of the oblique cylindrical pontoon, a width of 1 / 4-1 / 3 the diameter of the oblique cylindrical pontoon, and is located 1-5 meters below the rectangular box girder and installed on the oblique cylindrical pontoons at each corner point.

[0038] In this embodiment, the top of the central column 1 is connected to the wind turbine tower, and the middle and bottom of the structure are connected and fixed to the oblique cylindrical buoy through the inner diagonal brace and the inner horizontal brace respectively.

[0039] The specific usage principle is:

[0040] After the platform is installed at sea, it is fixed by a mooring system. The outer rectangular box girder 3 and the pancake-shaped pontoon 4 are both below the water surface. Buoyancy is provided by underwater buoys such as the central column 1 and the pancake-shaped pontoon 4. At the same time, the inclined cylindrical pontoon 2 is used as a ballast water tank, so that the center of gravity of the buoy is located below the center of buoyancy, thereby ensuring the stability of the buoy and reducing the requirements for the water depth of the working environment. The dimensions of the outer horizontal bar system 7, the inner diagonal bracing bar system 5 and the inner horizontal bar system 6 all meet the structural strength requirements, reduce the number of structural nodes, improve the fatigue strength of the structure, and provide a certain buoyancy for the buoy. The inclined cylindrical pontoons 2 are interconnected through the outer rectangular box girder 3, so that the restoring moment of the buoy is increased, the roll amplitude is reduced, and the wind and wave resistance of the buoy is further improved. The pancake-shaped pontoons 4 at each corner point can weaken the vertical swing of the buoy while providing buoyancy, thereby ensuring the stable movement of the buoy.

[0041] The utility model has low requirements on the water depth of the working environment, does not require complex mooring or anchoring systems, reduces the impact of wind and waves on the anchoring system, improves the overall stability of the structure, and reduces the cost and risk of operating and maintaining the mooring system;

[0042] The utility model can be transported to the wind farm site after being assembled at the dock, without the need for a special installation ship, thus greatly reducing the installation cost.

[0043] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An inverted triangular platform semi-submersible floating wind turbine foundation structure, characterized in that: It includes oblique cylindrical pontoons located at the three corner points of the regular triangle. Adjacent oblique cylindrical pontoons are connected by rectangular box beams. A pie-shaped pontoon is arranged below the rectangular box beam. A central column is arranged at the center of the triangle. The central column is connected to each oblique cylindrical pontoon through an inner oblique support rod system. The bottom is connected to each oblique cylindrical pontoon through an inner horizontal rod system. Each oblique cylindrical pontoon is connected to a mooring system.

2. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The oblique cylindrical buoys located at the three corner points of the equilateral triangle are in the shape of an inverted triangular pyramid as a whole.

3. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The basic structure also includes an outer horizontal rod system, and the bottoms of the oblique cylindrical pontoons are connected through the outer horizontal rod system.

4. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The planes on which the inner horizontal bar system and the outer horizontal bar system are located are parallel to each other, and both have circular tube structures in cross-section.

5. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The rectangular box beam has a rectangular cross section, a width that is 1 / 3 of the diameter of the oblique cylindrical pontoon, and is connected to the oblique cylindrical pontoon.

6. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The horizontal cross section of the oblique cylindrical buoy is circular, and the cross section perpendicular to the axis of the oblique cylindrical buoy is elliptical.

7. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The horizontal cross-section of the pancake-shaped pontoon is a circular closed structure, with a diameter 1.5-1.7 times the diameter of the oblique cylindrical pontoon and a width 1 / 4-1 / 3 of the diameter of the oblique cylindrical pontoon, and is located 1-5 meters below the rectangular box girder.

8. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The top of the central column is connected to the wind turbine tower.

9. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The bottoms of the oblique cylindrical buoys are interconnected through an outer horizontal rod system, and the angle between the structural axis of the oblique cylindrical buoy and the horizontal plane is 120-150 degrees.

10. The inverted triangular prism-shaped semi-submersible floating wind turbine foundation structure according to claim 1, characterized in that: The centers of the oblique cylindrical buoys are connected to form an equilateral triangle.

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