CN110745216A - A kind of fishery cage and floating fan foundation combined structure and construction method - Google Patents

Abstract

The invention provides a basic combined structure of a fishery cage and a floating fan and a construction method, including a wind turbine unit and a polygonal deep-sea fishery cage floating body; the polygonal deep-sea fishery cage floating body includes an upper polygonal floating body frame, a bottom ring beam, and a middle truss type. Structure, a column is set between the upper polygonal floating body frame and the bottom ring beam; the connection structure of the wind turbine is set on the upper polygonal floating body frame; the bottom of the polygonal deep-sea fishery cage floating body is set with an interface connected to the steel cable of the mooring system; polygonal deep-sea fishery The cage float is provided with subdivisions that can be filled with water ballast and provide buoyancy. The invention can be applied to deep-sea areas with a water depth of more than 50m, considering the combination of offshore wind power and marine pasture fish farming, the fish farming is very profitable, and combined with new energy wind power, the cost recovery period can be greatly shortened, and the structure is stable and the force is good; And it can be prefabricated on land and transported by floating, which reduces the amount of offshore operations and is convenient for transportation; multiple wind turbines can be installed at the same time.

Description

A kind of fishery cage and floating fan foundation combined structure and construction method

technical field

The invention relates to a basic combined structure of a fishery cage and a floating fan, which is suitable for offshore wind power generation and marine pasture aquaculture, and is suitable for sea areas with a water depth greater than 50 m.

Background technique

The development and utilization of resources in sea areas with water depths greater than 50 m is the development trend of building a powerful marine country. The development and utilization of deep-sea wind power, deep-sea marine pastures and fish farming have become hot spots. For deep sea areas, the economics of floating wind power foundations will be prominent compared to conventional fixed wind turbine foundations. Combining offshore wind power with marine ranch fish farming is of great significance for shortening the cost recovery period and generating related profits.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a basic combined structure of a fishery cage and a floating fan, which can be applied to wind farms and marine pastures for fish farming in sea areas with a water depth of 50m and above, and is convenient for construction and installation and economical to operate. For this reason, the present invention adopts the following technical solutions:

A basic combined structure of a fishery cage and a floating fan is characterized by comprising a wind turbine, a polygonal deep-sea fishery cage floating body and a mooring system;

The polygonal deep-sea fishery cage floating body includes an upper polygonal floating body frame, a bottom ring beam, and a middle truss structure between the upper floating body frame and the bottom ring beam, the middle truss structure includes a connecting column, and the upper polygonal floating body frame and The vertical column is arranged between the bottom ring beams; the connection structure of the wind turbine is arranged on the upper polygonal floating body frame; the bottom of the polygonal deep-sea fishery cage floating body is provided with an interface connected with the steel cable of the mooring system;

The buoyancy of the floating body of the polygonal deep-sea fishery cage is adjustable, and is provided with subdivisions that can inject water ballast and provide buoyancy.

On the basis of adopting the above-mentioned technical solutions, the present invention can also adopt the following further technical solutions or apply these further technical solutions in combination:

The connection structure of the wind turbine can usually be arranged at the polygon corners or inflection points of the upper polygonal floating body frame, preferably, the uprights are connected between the polygonal corners or inflection points of the upper polygonal floating body frame and the bottom ring beam.

The bottom ring beam can also be a polygon consistent with the upper polygonal floating body frame, and the upright column is connected between the corner points or inflection points of the upper polygonal floating body frame and the corresponding corner/inflection point of the bottom ring beam.

Preferably, the column is located directly below the connection structure and is coaxial with the tower of the wind turbine.

The bottom ring beam is provided with an interface connected with the steel cable or steel cable of the mooring system. The mooring system is a structure (gravity block, pile, negative pressure cylinder, etc.) fixed on the seabed and an anchor cable (steel cable/cable).

The inner area of the polygonal deep-sea fishery cage floating body constitutes a culture area, and the net clothing of the deep-sea fishery cage is connected with the polygonal deep-sea fishery cage floating body.

The upper polygonal floating body frame is a floating body frame with adjustable buoyancy, and is provided with subdivisions that can inject water ballast and provide buoyancy. The polygonal corners of the upper polygonal floating body frame are provided with corner buoyancy cabins.

The maximum buoyancy provided by the buoyancy cabin (which can be arranged on the upper polygonal floating body frame, bottom ring beam, and middle truss structure as required) provided by the polygonal deep-sea fishery cage floating body can satisfy the combination of wind turbines and polygonal deep-sea fishery cage floating bodies. The structure is floated to the deep sea area where it is installed and is able to provide the buoyancy and ballast (including water injection ballast) required for overall structural stability during the operational period (wind turbine power generation, fish cage culture) after it is in place.

Another technical problem to be solved by the present invention is to provide a construction method for a floating offshore wind turbine, which is convenient for construction and installation. For this reason, the present invention adopts the following technical solutions:

A construction method for a floating offshore wind turbine, characterized in that:

(1) The foundation of the wind turbine is any of the above-mentioned polygonal deep-sea fishery cage floating bodies, which are prefabricated in onshore processing plants, and are connected to the wind turbine through the connection structure. The wind turbine is installed at the corner of the upper polygonal floating body frame. Buoyancy, and then floated by tugboat to the deep sea anchoring position;

(2) After being transported to the deep-sea anchoring position, adjust the buoyancy by injecting water ballast into the corresponding buoyancy tank of the polygonal deep-sea fishery cage floating body, and fix it with the previously implemented mooring system through steel cables to adjust to the elevation required by the design , in order to meet the stability requirements required for fan operation.

The beneficial effects of the invention are as follows: considering the combination of offshore wind power and marine ranch fishery farming, fishery farming is highly profitable, combined with new energy wind power, the cost recovery period can be greatly shortened, and the net box body provided with the net clothing can also be used in terms of hydrodynamics. The dynamic characteristics of the overall structure are better, thereby enhancing the overall stability of the structure. The floating foundation structure is suitable for deep-sea areas with a water depth greater than 50m; the structure is stable and the force is good; and it can be prefabricated on land and floated for transportation, which reduces the amount of offshore operations and is convenient for transportation; multiple wind turbines can be installed at the same time.

Description of drawings

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a top view of the floating body structure in the embodiment of the present invention.

Detailed ways

As shown in FIG. 1 and FIG. 2 , the embodiment of the present invention provided here is an embodiment of installing one wind turbine. It includes an upper structure, a polygonal deep-sea fishery cage floating body, a steel cable 6 and a mooring system 7. The upper structure includes a tower 8, blades 11, a nacelle 9, a hub 10, etc., and is an offshore wind turbine.

The polygon of the floating body of the polygonal deep-sea fishery cage in this embodiment is generally triangular. The polygonal deep-sea fishery cage floating body includes an upper polygonal floating body frame 3, a bottom ring beam 5 and a middle truss structure between the upper floating body frame and the bottom ring beam.

The middle truss structure includes connecting columns 2 (buoyancy cabins and other structures can be set as required), and the columns 2 are arranged between the upper polygonal floating body frame and the bottom ring beam (usually set at the polygon corner/inflection point); The upper polygonal floating body frame is provided with the connection structure 1 of the wind turbine (usually it can be arranged at the corner point of the polygon), and the connection structure 1 can be a connection section type. connection, so that the wind turbine structure (tower, nacelle, hub, blades and internal accessories, etc.) is connected with the upper polygonal floating body frame 3, the column 2 can usually be arranged directly below the connection structure 1, and the tower 8 of the wind turbine is maintained. Coaxial, the load borne by the upper structure can be quickly transferred to the polygonal deep-sea fishery cage floating body, which improves the offshore force condition of the combined structure of the fishery cage and the floating fan base, making it more stable and more resilient.

The upper polygonal floating body frame is a floating body frame that can adjust the buoyancy by injecting water into the ballast tank. When the combined structure of the fishery cage and the floating fan base is transported on the sea surface, the buoyancy is adjusted to the most suitable state during transportation. After the overall structure is in place , and then adjusted to the elevation position of the operation period (wind turbine operation and fishery cage culture) required by the design, and connected with the mooring system to provide a reliable foundation for the wind turbine to be in the best operating conditions, the upper part leaking out of the water surface, providing work, operation and maintenance, etc. activity or work space; the lower part is located below the water surface, providing buoyancy and connecting to the middle truss structure.

The size of each polygonal corner portion 30 of the upper polygonal floating body frame is determined by design as compared with the size of the surrounding polygonal side portions according to actual requirements. The upper polygonal floating body frame is provided with buoyancy cabins, and the size and position are determined by design and calculation according to actual needs. In this embodiment, the buoyancy cabins of the upper polygonal floating body frame include corner buoyancy cabins 31 and polygonal edge buoyancy cabins 32. Buoyancy, ballast adjustment range and force performance.

The buoyancy chambers may be disconnected, so that the balance adjustment can be performed as required. Each buoyancy cabin can be provided with hatches for water injection and drainage to control its buoyancy.

Assuming that for the water depth of 100m~150m, the geometric dimensions of the polygonal deep-sea fishery cage floating body are as follows: the inner space of the polygonal deep-sea fishery cage floating body is inscribed in a circle with a radius of r = 62m, and the outermost edge is circumscribed by a circle with a radius of R = 87m. circle, the length of the outer buoy (buoyancy cabin 31) L = 53m, the length of the middle buoy (buoyancy cabin 32) l = 36m, the width at the end of the buoyancy cabin 31 W = 20m, the included angle θ = 37° (see Figure 2), The height between the upper polygonal floating body frame 3 and the bottom ring beam 5 (the height of the column 2) H=70m. This embodiment can provide about 100,000 cubic meters of cage volume, and the size should be calculated and designed according to actual needs during specific implementation.

The truss-type structure is a structure connecting the upper polygonal floating body frame and the bottom ring beam, and the space required for fishery cultivation is provided by arranging nets. According to actual needs, a buoyancy cabin can be set up to provide buoyancy. The middle truss structure includes connecting columns 2, horizontal bracing beams 41, bottom beams 42, and diagonal bracing beams 43, and a net 4 is provided on the horizontal bracing beams 41, bottom beams 42, oblique bracing beams 43, and vertical columns 2. It is necessary to When the buoyancy is provided, the buoyancy can be provided as required, and each structure together constitutes a "net-clothed" aquaculture cage space. The mesh can be made of copper to improve the anti-corrosion performance.

The inner area of the polygonal deep-sea fishery cage floating body constitutes the aquaculture area, which can be divided into multiple compartments for fish farming of different species. The compartments are separated by support members and nets to enhance the rigidity of the structure and facilitate the culture of different types of fish. .

A lifting net structure can be set up in the cage, so that the fishing can be completed through the lifting net.

The bottom of the polygonal deep-sea fishery cage floating body serves as a mooring stress-receiving part connected to the mooring system, and is provided with an interface 51 connected to the steel cable 6 of the mooring system 7, and the interface 51 can be set on the bottom ring beam. The mooring system 7 fixed on the seabed 12 is connected and fixed by the steel cable 6 .

The steel cable 6 is a plurality of steel cables or steel cables. The steel cables 6 connect the floating body structure 2 with the mooring system 7 anchored on the seabed, maintain the position of the platform and adjust its stability. During implementation, the appropriate specification and number of steel cables will be selected according to the tension required to connect the floating body structure 2 and the mooring system 7 .

The mooring system 7 is designed according to the soil conditions of the seabed, the environmental conditions of the sea area and the anchoring force required by the whole structure, and its type can be negative pressure bucket, gravity type, pile type or other fixed type.

The upper polygonal floating body frame of the present invention can be designed into different geometric polygons, such as triangles, quadrilaterals, etc., according to engineering needs. Depending on the design of the wind farm, wind turbines can be placed on part of the upper polygonal floating body frame or at each polygonal corner/inflection point. The size of the polygonal deep-sea fishery cage floating body is determined by design calculation according to the requirements for the spacing of the wind turbines and the requirements for the floating body to provide the floating body.

The construction method of the present invention is as follows:

1. The foundation of the wind turbine is the polygonal deep-sea fishery cage floating body, which is prefabricated by the onshore processing plant and made of steel box-shaped buoys, box-shaped beams, steel pipes and other steel structures. , the hub 10, the blade 11, etc.) are connected through the connection structure 1, and its buoyancy is adjusted, and then floated by the tugboat to the deep-sea anchoring position;

2. After transporting to the deep-sea anchoring position, adjust the buoyancy by injecting water ballast into the buoyancy tank, and fix it with the mooring system 7 implemented in advance through the steel cable 6, and adjust to the elevation required by the design to meet the requirements of the fan operation. stability requirements.

When aquaculture is required, a net is fixed in the floating body of the polygonal deep-sea fishery cage, and fish fry are put in for cultivation.

The above are only specific implementation cases of the invention, and the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the relevant fields within the field of the present invention are all included in the protection scope of the present invention. .

Claims (10)

1. A fishery net cage and floating fan foundation combined structure is characterized by comprising a wind turbine generator, a polygonal deep sea fishery net cage floating body and an anchoring system;

the polygonal deep sea fishery net cage floating body comprises an upper polygonal floating body frame, a bottom ring beam and a middle truss type structure between the upper polygonal floating body frame and the bottom ring beam, wherein the middle truss type structure comprises a connecting upright post, and the upright post is arranged between the upper polygonal floating body frame and the bottom ring beam; a connecting structure of the wind turbine generator is arranged on the upper polygonal floating body frame; the bottom of the polygonal deep sea fishery net cage floating body is provided with an interface connected with a steel cable of an anchoring system;

the buoyancy of the polygonal deep sea fishery net cage floating body is adjustable, and the polygonal deep sea fishery net cage floating body is provided with a sub-chamber capable of being pressurized by water and providing buoyancy.

2. The fishery net cage and floating fan foundation combination structure as claimed in claim 1, wherein a polygonal corner point or an inflection point of the upper polygonal floating body frame is provided with a connection structure of the wind turbine generator, and the upright post is connected between the polygonal corner point or the inflection point of the upper polygonal floating body frame and the bottom ring beam.

3. The fishery net cage and floating fan foundation combination structure as claimed in claim 1, wherein the bottom ring beam is polygonal consistent with the upper polygonal floating body frame, polygonal corner points or inflection points of the upper polygonal floating body frame are provided with the connection structure of the wind turbine generator, and the upright posts are connected between the corner points or inflection points of the upper polygonal floating body frame and the corresponding corner points or inflection points of the bottom ring beam.

4. The combination fishing net cage and floating fan foundation structure as claimed in claim 1, wherein the upright is located right below the connecting structure and is coaxial with a tower of a wind turbine generator.

5. The combination fishery cage and floating fan foundation structure of claim 1, wherein the bottom ring beam is provided with an interface for connecting with a wire rope or a steel cable of an anchoring system.

6. The fishery net cage and floating fan foundation combination structure according to claim 1, wherein the upper polygonal floating frame is a floating frame with adjustable buoyancy and is provided with sub-compartments capable of filling water for loading and providing buoyancy.

7. The fishery net cage and floating fan foundation combination structure according to claim 1, wherein a corner type buoyancy chamber is arranged at a polygonal corner of the upper polygonal floating body frame.

8. The combination structure of the fishery net cage and the floating fan foundation as claimed in claim 1, wherein the inner region of the polygonal deep sea fishery net cage floating body constitutes a breeding region, and the net of the deep sea fishery net cage is connected with the polygonal deep sea fishery net cage floating body.

9. The fishery net cage and floating fan foundation combination structure according to claim 1, wherein the maximum buoyancy provided by the buoyancy compartment arranged on the polygonal deep sea fishery net cage floating body is the buoyancy and ballast required for meeting the requirements of the combined structure of the wind turbine generator and the polygonal deep sea fishery net cage floating body to be transported to an installation deep sea area in a floating mode and providing overall structural stability in a running period after the net cage and the floating fan are in place.

10. A construction method of a floating offshore wind turbine generator system is characterized by comprising the following steps:

(1) the polygonal deep sea fishery net cage floating body is used as the basis of the wind turbine generator and is any one of the polygonal deep sea fishery net cage floating bodies in the claims 1, 2, 3, 4, 5, 6, 7, 8 or 9, a processing factory on land is prefabricated and is connected with the wind turbine generator through a connecting structure, the wind turbine generator is installed at the corner of the polygonal floating body frame on the upper portion, buoyancy is adjusted, and then the wind turbine generator is transported to a deep sea anchoring position through a tugboat in a floating mode;

(2) after the wind power generator is transported to a deep sea anchoring position, the buoyancy is adjusted by injecting water ballast into corresponding buoyancy chambers of the polygonal deep sea fishery net cage floating body, and the wind power generator is fixed with an anchoring system which is implemented in advance through a steel cable and adjusted to the elevation of the design requirement so as to meet the stability requirement which is required by the running of a fan.

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