CN217496487U - Prestress-steel structure integrated offshore floating ball floating type wind power foundation structure - Google Patents
Prestress-steel structure integrated offshore floating ball floating type wind power foundation structure Download PDFInfo
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- CN217496487U CN217496487U CN202220479579.4U CN202220479579U CN217496487U CN 217496487 U CN217496487 U CN 217496487U CN 202220479579 U CN202220479579 U CN 202220479579U CN 217496487 U CN217496487 U CN 217496487U
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Abstract
The utility model provides a prestress-steel structure integrated offshore floating ball floating type wind power foundation structure, which comprises a plurality of floating balls, trusses, steel pipes and a fan tower drum; the steel pipe is connected with the lower part of the fan tower cylinder, and the steel pipe is connected with the floating ball through a truss; a prestressed steel strand is arranged between the adjacent floating balls to integrate the floating balls. The utility model solves the problems of eccentric arrangement of offshore wind turbine and tower, large steel consumption, large hydrodynamic load and the like, greatly saves the engineering cost and improves the safety performance of the foundation structure; the floating ball is a steel hollow ball body, and high-pressure gas is filled into the ball body, so that the ball body can effectively resist overlarge deformation under hydrodynamic load, the safety of the floating ball is ensured, the wall thickness of the ball body is greatly reduced, and the engineering quantity can be effectively reduced; the floating balls, the rigid pipes and the truss combined structure form a whole through welding, the floating balls are connected through prestressed steel strands, the integrity of a foundation structure is guaranteed, and a force transmission system is reasonable.
Description
Technical Field
The utility model belongs to the technical field of offshore wind power generation, especially, relate to a formula wind power infrastructure is floated to marine floater of prestressing force-steel construction integration pattern.
Background
With the development of offshore wind power to large capacity, large scale and deep open sea in China, the traditional wind power foundation types such as single pile foundation, high pile cap foundation, barrel type foundation and jacket foundation are difficult to be applied. Meanwhile, as the water depth is continuously increased, the environmental load is continuously increased, and the safety and the reliability of the foundation are very important for the offshore wind turbine structure. The floating foundation has the advantages of easy construction, high construction efficiency, no influence of water depth and landform and the like, and provides an optimal choice for developing deep and distant sea wind and electricity resources.
Currently, floating foundation structural types in the field of ocean engineering are generally of the column type, the semi-submersible type and the tension leg type. The center of gravity of the column foundation is far lower than that of the floating center, and when the column foundation is inclined under the action of horizontal load, buoyancy generates a large restoring moment on the center of gravity, and the working water depth of the column foundation is usually more than 100 m; the semi-submersible foundation has the advantages of moderate movement in all directions, capability of being transported by adopting a wet towing method, mature technology and the like, is suitable for sea areas with water depth of more than 40 m, and the existing floating wind power foundation basically adopts the form; the tension leg type foundation has the advantages of high stability, light dead weight and the like, is suitable for sea areas with water depth of more than 40 m, but has a complex installation process of a mooring system and high construction cost of tension tendons, and is not applied to actual engineering at present. Through comparison, the semi-submersible foundation is more suitable for deep and remote sea wind power projects.
In addition, the existing offshore wind power floating type semi-submersible foundation has the following defects: 1) the hub height of the fan is high, so that the hub height is limited by installation condition control, the length of a suspension arm of the crane and the installation of the ship engine are limited, and the fan and the tower cylinder are generally arranged on one side of the floating foundation instead of the center of the floating foundation, so that the eccentricity of the whole structure and larger overturning moment are inevitably caused; 2) if the fan is installed at the center of the floating foundation, the span between floating structure floating bodies needs to be increased so as to meet the requirement of installation machinery, and the steel consumption is inevitably increased greatly; 3) the floating structure has high requirements on the sealing performance and the strength of the buoyancy tank, and the engineering quantity of the buoyancy tank can be greatly increased in order to ensure the safety of the structure; 4) the semi-submersible foundation is large in water-facing area and large in hydrodynamic load, and the foundation can generate large plane displacement under the action of wave current.
Consequently, need urgent research and development a marine showy formula wind power foundation structure, satisfying under the prerequisite of structure safety and reliability, save foundation structure steel quantity, reduce hydrodynamic load, guarantee the convenience of showy formula wind power structure integral erection simultaneously, and then reduce showy formula wind power basis investment cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a formula wind power infrastructure is floated to marine floater of prestressing force-steel construction integration pattern to current deep sea wind power floating foundation structure has that the steel quantity is big, eccentric atress, the big scheduling problem of hydrodynamic load, provides.
For this reason, the above-mentioned purpose of the present invention is achieved by the following technical solutions:
the utility model provides a marine floater of prestressing force-steel construction integration type floats formula wind power foundation structure which characterized in that: the prestress-steel structure integrated offshore floating ball floating type wind power foundation structure comprises a plurality of floating balls, trusses, steel pipes and a fan tower barrel;
the steel pipe is connected with the lower part of the fan tower cylinder, and the steel pipe is connected with the floating ball through a truss;
a prestressed steel strand is arranged between the adjacent floating balls to integrate the floating balls.
When adopting above-mentioned technical scheme, the utility model discloses can also adopt or make up and adopt following technical scheme:
as the utility model discloses a preferred technical scheme: the truss is respectively welded with the floating ball and the steel pipe.
As the utility model discloses a preferred technical scheme: the upper end of the steel pipe is fixed with the lower end of the fan tower cylinder through an anchor bolt.
As the utility model discloses an preferred technical scheme: the floating ball comprises a plurality of side steel plates, a bottom steel plate, a top steel plate and an air bag arranged inside the floating ball; the side steel plates, the bottom steel plate and the top steel plate are welded in a full penetration mode.
As the utility model discloses a preferred technical scheme: the top steel plate is provided with an inflation valve and an air pressure monitoring device, the inflation valve is used for inflating the air bag inside the floating ball, and the air pressure monitoring device is used for monitoring the internal air pressure of the air bag inside the floating ball.
As the utility model discloses a preferred technical scheme: the outer surface of the floating ball is provided with a mooring rope anchor machine and a mooring rope, and the mooring rope anchor machine is used for ascending or descending the mooring rope to fix the floating ball.
As the utility model discloses a preferred technical scheme: the outer surface of the floating ball is provided with a prestressed steel strand connecting piece, and the prestressed steel strand connecting piece is used for penetrating prestressed steel strands.
The utility model provides a formula wind-powered electricity generation foundation structure is floated to marine floater of prestressing force-steel construction integration pattern has following beneficial effect:
1) the utility model provides a marine floater of prestressing force-steel construction integration type floats formula wind-powered electricity generation foundation structure has solved offshore wind turbine generator system and a tower section of thick bamboo off-centre and has arranged, with big, hydrodynamic load big scheduling difficult problem of steel volume, practices thrift engineering cost, improvement foundation structure security performance by a wide margin.
2) The floating ball is a steel hollow ball body, and the ball body is filled with high-pressure gas, so that the ball body can be effectively prevented from deforming too much under hydrodynamic load, the safety of the floating ball is ensured, the wall thickness of the ball body is greatly reduced, and the engineering quantity can be effectively reduced.
3) The floating ball, the rigid pipe and the truss combined structure form a whole through welding, the floating balls are connected through the prestressed steel stranded wires, the integrity of a foundation structure is guaranteed, a force transmission system is reasonable, and the mechanical property advantages of a steel structure and the steel stranded wires are exerted to the maximum extent.
4) The wave force borne by the floating ball floating type foundation structure is greatly reduced, the hydrodynamic force of each direction of the floating ball is effectively reduced, and meanwhile, the area of the wave force borne by the prestressed steel strand is extremely small and can be almost ignored.
5) The wind turbine generator set can be hoisted and completed in a base built on land, the requirement on crane equipment is low, the construction period can be greatly shortened, and the cost can be saved.
6) The floating ball floating type foundation structure can be transported to a wind electric field area through a wet-dragging method, large ships are not needed to participate in transportation and hoisting construction, and construction cost is greatly saved.
Drawings
Fig. 1 is a top view of a prestressed-steel structure integrated offshore floating ball floating type wind power infrastructure provided by the present invention;
fig. 2 is a front view of the prestress-steel structure integrated offshore floating ball floating type wind power infrastructure provided by the present invention;
fig. 3 is a three-dimensional view of the prestress-steel structure integrated type offshore floating ball floating type wind power infrastructure provided by the present invention;
FIG. 4a is a schematic view of a floating ball;
FIG. 4b is a layout view of the outer surface of the floating ball;
FIG. 5 is a schematic view of installation of a tower drum of a wind turbine generator on the upper portion of a floating ball floating type wind power foundation structure;
FIG. 6 is a schematic view of installation of an upper wind turbine generator cabin of the floating ball floating type wind turbine foundation structure;
FIG. 7 is a schematic mounting diagram of blades of a wind turbine generator on the upper portion of a floating ball floating type wind power foundation structure;
fig. 8 is a schematic diagram of the floating ball floating type wind power infrastructure in a towing state;
fig. 9 is a schematic view of a floating ball floating type wind power infrastructure in a mooring state;
in the figure: 1-floating ball, 2-steel pipe, 3-truss, 4-prestressed steel strand, 5-tower, 6-crane, 7-cabin, 8-blade, 9-tug and 10-mooring cable.
Detailed Description
To current deep sea wind-powered electricity floating foundation structure have steel quantity big, eccentric atress, the big scheduling problem of hydrodynamic load, the utility model discloses at first provide buoyancy for overall structure through a plurality of spherical floaters, the floater passes through the truss to be connected with fan bottom steel pipe, and the floater interval guarantees the wind turbine generator system installation requirement, accomplishes the back at the wind turbine generator system installation, connects through prestressing force steel strand wires between the floater and forms the integration pattern, transports to the wind field district through wet dragging at last.
The prestress-steel structure integrated offshore floating ball floating type wind power foundation structure comprises 3 steel hollow balls with the same radius as floating balls, the 3 floating balls are symmetrically arranged around the center of a fan tower cylinder in an annular mode, a section of steel pipe is arranged at the bottom of a flange of the fan tower cylinder, the 3 floating balls are connected with the steel pipe on the lower portion of the tower cylinder through trusses, and the floating balls are connected through prestress steel strands, so that the integral floating ball floating type foundation structure is formed. The specific structure is described as follows:
(1) and a floating ball
The floating balls are made of steel plates with the plate thickness of about 16-20 mm, and the diameter and the distance of the floating balls need to be designed to ensure the requirements of stability and overturning resistance of the floating type wind power foundation integral structure in an extreme environment. Consider that spherical structure processing is more difficult, can adopt polylith steel sheet concatenation welding to form the spheroid, set up the rib at the spheroid inboard and carry out the structure and strengthen, especially spheroid structural connection department and truss and prestressing force steel strand wires junction need do extra structural reinforcement to guarantee that the floater is not destroyed. And nondestructive flaw detection and air tightness test are required after the floating ball is welded, so that the tightness of the floating ball is ensured, and water and air leakage are avoided. The floater welds on bracket frock, prevents that the floater from rolling, translation, the subsequent floater of being convenient for simultaneously assembles with other structures. In addition, in order to save the steel consumption, the wall thickness of the steel plate of the ball body of the floating ball is thin, an inflation airbag is arranged inside the floating ball, an inflation valve is arranged at the top of the floating ball and used for filling high-pressure gas into the airbag in the floating ball, the high-pressure gas can ensure that the floating ball is not damaged under the action of external force, and meanwhile, an air pressure monitoring device is arranged for monitoring. The outer surface of the floating ball is provided with a mooring cable anchor machine, a matched mooring cable and a prestressed steel strand connecting piece. The outer surface of the floating ball is subjected to corrosion prevention of the whole structure by spraying paint and combining with impressed current cathodic protection.
(2) The steel pipe is connected with the tower barrel
The bottom connection type of a fan unit tower cylinder is consistent with the fixed single-pile wind power foundation type, a tower cylinder bottom flange is connected with a steel pipe, and the bottom of the steel pipe is blocked by a steel plate. Meanwhile, at the joint of the steel pipe and the truss, the reinforcing ring plate is arranged in the steel pipe according to the stress condition of the structure, so that the structure safety is ensured.
(3) Truss frame
The truss is used for connecting steel pipe and floater under the fan tower section of thick bamboo, and every floater is connected with steel pipe under the tower section of thick bamboo through 4 truss steel pipes, and whole truss arranges at the floater episphere, reduces truss steel pipe and sea water contact surface as far as possible to reduce the water dynamic load.
(4) Prestressed steel strand
The floating ball floating type foundation steel structure is manufactured on a land building base, a prestressed steel strand is not installed firstly, after a fan unit and a tower cylinder are installed, the prestressed steel strand is installed, and prestressed tension is performed, so that the floating type foundation is formed into a reliable whole, and the steel strand is located at a straight line position connected with the spherical centers of 3 floating balls.
Floating ball floating type foundation installation method
(1) Installation of floating foundation
3 floating balls are built in a processing workshop and assembled on an open field, the 3 floating balls and the steel pipe at the lower part of the wind power foundation are welded, and then the assembled structure is launched and fixed on the bank side.
(2) Installation of tower drum and fan
The wind turbine tower drum and the wind turbine generator set can be used for installing the wind turbine tower drum, the engine room and the blades through the crawler crane in a base built on land, and the construction period can be greatly shortened and the cost can be saved by building the base on land and hoisting.
(3) Installation of prestressed steel strands
After the tower barrel and the wind generating set are installed, the floating balls are connected in pairs by steel stranded wires, and the 3 steel stranded wires are tensioned after connection is completed, so that the same pre-tightening force is finally achieved.
(4) Wet-towing transportation and installation in place
After the shore debugging is finished, the wind turbine generator and the whole floating type foundation system are transported to the design position of the wind electric field area through a tugboat by a wet towing method, and the position and the movement of the floating ball floating type wind turbine foundation are restrained by a mooring system. Therefore, the installation of the prestress-steel structure integrated offshore floating ball floating type wind power foundation structure is completed.
In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is provided in conjunction with the specific examples. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in fig. 1-3, the utility model provides a marine floater floating type wind power infrastructure of prestressing force-steel construction integration type, including floater 1, steel pipe 2, truss 3, prestressing force steel strand wires 4 etc. The offshore floating ball floating type wind power foundation structure can guarantee reliable connection and reasonable stress, and can exert the mechanical property advantages of a steel structure and steel strands to the maximum extent.
Specifically, as shown in fig. 1 to 3, the offshore floating ball floating type wind power foundation structure takes a steel pipe 2 below a tower as a center, the floating balls 1 are arranged in an equilateral triangle manner by taking the steel pipe 2 as the center, the diameter of each floating ball is 10 m, and the wall thickness is about 16-20 mm.
The floater 1 is welded in the position of the steel pipe 2 below the tower barrel through the truss 3, the floater 1 is connected with each other through the prestressed steel stranded wire 4, and the steel pipe 2 below the tower barrel is connected with the tower barrel 5 through a tower barrel bottom flange and an anchor bolt.
As shown in fig. 4, the floating ball 1 is divided into a plurality of side steel plates 1-1, bottom steel plates 1-2, top steel plates 1-3, air bags 1-4 inside the floating ball, mooring anchor machines 1-5 and prestressed steel strand connecting pieces 1-6, wherein the side steel plates 1-1, the bottom steel plates 1-2 and the top steel plates 1-3 are welded to ensure full penetration and perform nondestructive flaw detection; the top steel plate 1-3 is provided with an inflation valve and an air pressure monitoring device, the air bag 1-4 is inflated and pressurized through the inflation valve of the top steel plate 1-3, and the air pressure inside the air bag 1-4 is monitored through the air pressure monitoring device communicated with the inflation valve, so that the structural safety and the internal air tightness of the floating ball 1 are guaranteed.
As shown in fig. 5 to 9, the above-mentioned prestress-steel structure integrated offshore floating ball floating type wind power infrastructure is implemented by the following processes:
1) the foundation is built on a land building base, and the marine floating ball floating type wind power foundation structure of the prestress-steel structure integrated type is built;
2) before the wind turbine generator set is installed, the prestressed steel strands 4 are not installed and tensioned, the crane 6 can run to the positions between the floating balls 1, the tower barrel 5, the engine room 7 and the blades 8 are hoisted, and the hoisting height and the hoisting distance of the crane meet the requirements;
3) after the wind turbine generator is installed, mounting prestressed steel strands 4 between floating balls 1, arranging a middle node tensioner in the middle of the prestressed steel strands, and performing prestressed tensioning through the tensioner, so that onshore construction and installation of the floating ball floating type foundation and the wind turbine generator are completed;
4) transporting the floating ball floating type foundation to the offshore wind power site by adopting a wet dragging method, and dragging the floating ball floating type foundation to the site of the offshore wind power site by using a dragging wheel 9;
5) and after the floating ball floating type wind turbine is positioned in the offshore wind farm, the floating ball floating type integral structure is moored and restrained through the mooring cable 10, so far, the installation of the offshore floating ball floating type wind turbine is completed.
The above embodiments are merely preferred technical solutions of the present invention, and it should be understood by those skilled in the art that modifications or substitutions of technical solutions or parameters in the embodiments can be made without departing from the principles and essential conditions of the present invention, and all the modifications or substitutions should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a marine floater of prestressing force-steel construction integration type floats formula wind power foundation structure which characterized in that: the prestress-steel structure integrated offshore floating ball floating type wind power foundation structure comprises a plurality of floating balls, trusses, steel pipes and a fan tower;
the steel pipe is connected with the lower part of the fan tower cylinder, and the steel pipe is connected with the floating ball through a truss;
and a prestress steel strand is arranged between the adjacent floating balls to integrate the floating balls.
2. The prestress-steel structure integrated offshore floating ball floating type wind power infrastructure of claim 1, wherein: the truss is respectively welded with the floating ball and the steel pipe.
3. The prestress-steel structure integrated offshore floating ball floating type wind power infrastructure of claim 1, wherein: the upper end of the steel pipe is fixed with the lower end of the fan tower cylinder through an anchor bolt.
4. The prestress-steel structure integrated offshore floating ball floating type wind power infrastructure of claim 1, wherein: the floating ball comprises a plurality of side steel plates, a bottom steel plate, a top steel plate and an air bag arranged inside the floating ball; the side steel plates, the bottom steel plate and the top steel plate are welded in a full penetration mode.
5. The prestress-steel structure integrated offshore floating ball floating type wind power infrastructure of claim 4, wherein: the top steel plate is provided with an inflation valve and an air pressure monitoring device, the inflation valve is used for inflating the air bag inside the floating ball, and the air pressure monitoring device is used for monitoring the internal air pressure of the air bag inside the floating ball.
6. The prestress-steel structure integrated offshore floating ball floating type wind power infrastructure of claim 1, wherein: the outer surface of the floating ball is provided with a mooring cable anchor machine and a mooring cable, and the mooring cable anchor machine is used for ascending or descending the mooring cable to fix the floating ball.
7. The prestress-steel structure integrated offshore floating ball floating wind power infrastructure of claim 1, wherein: the outer surface of the floating ball is provided with a prestressed steel strand connecting piece, and the prestressed steel strand connecting piece is used for penetrating prestressed steel strands.
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| CN202220479579.4U CN217496487U (en) | 2022-03-07 | 2022-03-07 | Prestress-steel structure integrated offshore floating ball floating type wind power foundation structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117028159A (en) * | 2023-10-09 | 2023-11-10 | 中国电力工程顾问集团有限公司 | Method for transporting mud floating type offshore wind turbine system and method for adjusting working height |
| CN117189502A (en) * | 2023-10-09 | 2023-12-08 | 中国电力工程顾问集团有限公司 | Mud floating type offshore wind turbine foundation and integral transportation method of mud floating type offshore wind turbine foundation and whole wind turbine |
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2022
- 2022-03-07 CN CN202220479579.4U patent/CN217496487U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117028159A (en) * | 2023-10-09 | 2023-11-10 | 中国电力工程顾问集团有限公司 | Method for transporting mud floating type offshore wind turbine system and method for adjusting working height |
| CN117189502A (en) * | 2023-10-09 | 2023-12-08 | 中国电力工程顾问集团有限公司 | Mud floating type offshore wind turbine foundation and integral transportation method of mud floating type offshore wind turbine foundation and whole wind turbine |
| CN117028159B (en) * | 2023-10-09 | 2023-12-08 | 中国电力工程顾问集团有限公司 | Method for transporting mud floating type offshore wind turbine system and method for adjusting working height |
| CN117189502B (en) * | 2023-10-09 | 2024-02-23 | 中国电力工程顾问集团有限公司 | Integral transportation method for mud floating type offshore wind turbine foundation and complete wind turbine machine |
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