CN210235267U

CN210235267U - Offshore wind turbine composite cylinder foundation towing structure

Info

Publication number: CN210235267U
Application number: CN201920879815.XU
Authority: CN
Inventors: Wenjun Fu; 付文军; Tieling Tao; 陶铁铃; Haibo Liu; 刘海波; Bin Zeng; 曾斌; You Zou; 邹尤; le Gan; 甘乐; Long Cao; 曹龙; Kai Liu; 刘凯; Fei Duan; 段斐; Yingying Dang; 党莹颖
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-04-03
Anticipated expiration: 2029-06-12

Abstract

The utility model relates to a compound section of thick bamboo basis of offshore wind turbine structure of towing navigation. The towing structure comprises at least one section of buoyancy tank annularly arranged around the concrete transition section, the utility model arranges the annular buoyancy tank around the concrete transition section and is connected with the cylindrical foundation through the buoyancy tank, the cylindrical foundation of the offshore wind turbine has low gravity center and high and adjustable buoyancy center during transportation, and has better wind and wave resistance and safety during towing transportation and sinking; the towing rod piece and the buoyancy tank are convenient to disassemble and assemble, the construction period is short, the cost is low, and the towing rod piece and the buoyancy tank are good in economy and beneficial to popularization and application.

Description

Offshore wind turbine composite cylinder foundation towing structure

Technical Field

The utility model relates to a marine wind power equipment, concretely relates to compound section of thick bamboo basis of offshore wind turbine structure of towing boat.

Background

Under the environment of global high concern on developing low-carbon economy, wind power generation has huge market potential as a renewable energy source. Although the offshore wind power starts late, the offshore wind power is rapidly developing all over the world in recent years due to the characteristics of stability of sea wind resources and large power generation capacity. And the difficulty and high cost of the construction of the wind turbine foundation are one of the maximum limiting conditions for the construction of the offshore wind farm. Compared with other foundation forms, the cylindrical foundation has great application advantages. The cylindrical foundation is low in manufacturing cost and quick to install, has a huge development prospect, but is difficult to transport and high in cost, and is the main reason for the quick development of the cylindrical foundation at present.

Due to the self-weight of the barrel foundation, the geological condition of the Guangdong region is limited. If a cylindrical foundation is adopted, the self weight of the foundation reaches 7000t, and the height and the width of the foundation both reach 40 m. The ship transportation is limited, and great hidden danger exists. Using a barge, fewer vessels are available and the cost is high. The special customized ship is also expensive to transport in a floating mode, and is difficult to bear as an enterprise aiming at profit.

SUMMERY OF THE UTILITY MODEL

For solving the above problem, the utility model provides a compound section of thick bamboo basis of offshore wind turbine structure of towing boat, this method accomplish the work of towing boat through external flotation tank, simultaneously, because height-adjustable during the barrel transportation, the floating heart is higher, consequently has better superficial stationarity, and in addition, flotation tank and connecting rod and reuse have higher economic nature.

The utility model adopts the technical proposal that: the utility model provides a compound section of thick bamboo basis of offshore wind turbine structure of towing navigation which characterized in that: including being the annular at least a lesson flotation tank that sets up around the concrete changeover portion, every section flotation tank bottom all is connected with the concrete bottom plate, every section flotation tank medial surface is connected with the concrete changeover portion.

Preferably, the bottom of each buoyancy tank is connected with the concrete bottom plate through an outer stay cable and an inner stay cable which are arranged in a crossed mode, the outer stay cable is connected with the outer side of the bottom of the buoyancy tank and a hanging ring on an inner ring beam pre-embedded on the concrete bottom plate, and the inner stay cable is connected with the inner side of the bottom of the buoyancy tank and a hanging ring on an outer ring beam pre-embedded on the concrete bottom plate

Preferably, the inner side surface of each section of the buoyancy tank is connected through a horizontal steel cable, one end of each horizontal steel cable is fixedly connected with the inner side surface of the buoyancy tank, and the other end of each horizontal steel cable is connected with a corresponding pull ring pre-embedded on the concrete transition section.

Preferably, eight sections of buoyancy tanks are annularly arranged around the concrete transition section, and two adjacent sections of buoyancy tanks are connected together through connecting rods.

Preferably, each section of the buoyancy tank is internally provided with at least one water-insulation cabin, and each water-insulation cabin of the buoyancy tank is independently provided with an air charging and discharging valve and a water charging and discharging valve.

The utility model discloses the beneficial effect who gains is: the utility model arranges the annular buoyancy tanks around the concrete transition section and is connected with the cylindrical foundation through the buoyancy tanks, so that the cylindrical foundation of the offshore wind turbine has low gravity center and high and adjustable buoyancy center during transportation, and has better wind wave resistance and safety in towing transportation and sinking processes; the towing rod piece and the buoyancy tank are convenient to disassemble and assemble, the construction period is short, the cost is low, and the towing rod piece and the buoyancy tank are good in economy and beneficial to popularization and application.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

reference numerals: 1. a steel cylinder; 2. a concrete transition section; 3. a hoisting ring; 31. an outer ring beam; 32. an inner ring beam; 4. a buoyancy tank; 5. an outer cable; 6. an inner cable; 7. an inflation and exhaust valve; 8. a water filling and draining valve; 9. a horizontal steel cable; 10. a connecting rod; 11. a pull ring; 101. sea level.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, the marine wind turbine composite cylinder foundation towing structure comprises at least one section of buoyancy tank 4 annularly arranged around a concrete transition section 2, the bottom of each section of buoyancy tank 4 is connected with a concrete bottom plate at the top of a steel cylinder 1 through an outer stay cable 5 and an inner stay cable 6 which are arranged in a crossed manner, the outer stay cable 5 is connected with the outer side of the bottom of the buoyancy tank 4 and a hanging ring 3 on an inner ring beam 32 pre-embedded on the concrete bottom plate, and the inner stay cable 6 is connected with the inner side of the bottom of the buoyancy tank 4 and the hanging ring 3 on an outer ring beam 31 pre-embedded on the concrete bottom plate; every section of 4 medial surfaces of flotation tank pass through horizontal steel cable 9 to be connected, and 9 one end of horizontal steel cable and 4 medial surfaces of flotation tank fixed connection, the other end is connected with pre-buried corresponding pull ring 11 on the concrete changeover portion 2.

In this embodiment, concrete changeover portion 2 annular all around is equipped with eight sections flotation tanks 4, and two adjacent sections flotation tanks 4 link together through connecting rod 10, and connecting rod 10 is adjustable rigid bolted steel, and equidistant distribution is between shell type basis and flotation tank 4, and connecting rod 10 can be adjusted according to the transportation requirement. The buoyancy tanks 4 can be composed of one, two or more independent tanks, and the buoyancy tanks 4 are independent from each other and can be connected and combined with each other through bolts; one or more water-proof chambers are arranged in the buoyancy tank 4, and each tank body and each chamber body are provided with a separate inflation and drainage valve 7 and a separate inflation and drainage valve 8.

A towing method for a composite cylinder foundation of an offshore wind turbine comprises the following steps:

1) manufacturing a steel cylinder 1 and a concrete transition section 2 on a dock, a wharf or a cofferdam, completing assembly, and respectively embedding a hanging ring 3 and a pull ring 11 on a concrete bottom plate and the transition section; manufacturing the buoyancy tank 4 and the connecting rod 10 in a factory;

2) after the composite cylinder foundation is manufactured, the composite cylinder foundation is put into water through a crane and a barge for floating or towing; installing a connecting rod 10, and connecting eight sections of buoyancy tanks 4 into a ring shape around the concrete transition section 2; each section of buoyancy tank 4 is connected with the cylindrical foundation in the vertical direction through an outer cable 5 and an inner cable 6 respectively, as shown in fig. 1, the outer cable 5 and the inner cable 6 are arranged in a crossed mode, the outer cable 5 is connected with the outer side of the buoyancy tank 4 and a bottom plate inner ring beam 32, the inner cable 6 is connected with the inner side of the buoyancy tank 4 and a bottom plate outer ring beam 31, and each section of buoyancy tank is simultaneously connected with 2-3 outer cables 5 and inner cables 6 respectively; the positions of the buoyancy tank 4 and the concrete transition section 2 are kept relatively stable through a horizontal steel cable 9. Sixteen pull rings 11 are arranged along the circumference of the concrete transition section 2, each buoyancy tank 4 is provided with two horizontal steel pull cables 9 which are connected with the concrete transition section 2 through the pull rings 11, the horizontal steel pull cables 9 are initially in a loose state, and a certain tensioning allowance is reserved;

3) the length of the connecting rod 10 is adjusted, the stability and the waterline of the buoyancy tank 4 are adjusted by inflating, draining and inflating and exhausting through the inflation and drainage valve 7 and the inflation and drainage valve 8, and the bottom part of the steel cylinder 1 is inflated (or not inflated), so that the cylinder type foundation floats on the water surface, and towing is facilitated; in order to prevent incomplete transportation caused by the fact that the gravity center is too much higher than the floating center, the air quantity of the floating box 4, the length of the connecting rod 10 and the bin-divided air inflation quantity of the steel cylinder 1 can be adjusted according to the field condition, so that the transportation safety is ensured; if unforeseen stormy waves occur, the steel cylinder 1 can be sunk temporarily to protect the cylinder foundation from being damaged;

4) when sinking, firstly discharging gas in the steel cylinder 1 (if the gas is not needed, the action is not needed), and then gradually discharging gas in the buoyancy tank 4 (filling water into the buoyancy tank) to enable the foundation to sink; after the foundation is stably sunk on the mud surface, the connection between the vertical outer stay cables 5 and the vertical inner stay cables 6 and the concrete bottom plate at the top of the steel cylinder 1 is firstly released, and after the eight sections of buoyancy tanks 4 integrally float on the water surface, the connection between the buoyancy tanks 4 is released by removing the connecting rods 10 so as to recycle the buoyancy tanks 4 for reuse; and the steel cylinder 1 is sunk in a way of generating negative pressure by self weight and air suction.

The foregoing shows and describes the general principles and principal structural features of the invention. The present invention is not limited by the above-mentioned examples, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and improvements fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a compound section of thick bamboo basis of offshore wind turbine structure of towing navigation which characterized in that: including being the annular at least a lesson flotation tank that sets up around the concrete changeover portion, every section flotation tank bottom all is connected with the concrete bottom plate, every section flotation tank medial surface is connected with the concrete changeover portion.

2. The marine wind turbine composite cylinder foundation towing structure according to claim 1, characterized in that: the bottom of each buoyancy tank is connected with a concrete bottom plate through an outer stay cable and an inner stay cable which are arranged in a crossed mode, the outer stay cable is connected with the outer side of the bottom of the buoyancy tank and hanging rings on an inner ring beam pre-buried on the concrete bottom plate, and the inner stay cable is connected with the inner side of the bottom of the buoyancy tank and hanging rings on an outer ring beam pre-buried on the concrete bottom plate.

3. The marine wind turbine composite cylinder foundation towing structure according to claim 1, characterized in that: every section the flotation tank medial surface is connected through horizontal steel cable, horizontal steel cable one end and flotation tank medial surface fixed connection, the other end is connected with the pre-buried corresponding pull ring on the concrete changeover portion.

4. The marine wind turbine composite cylinder foundation towing structure according to claim 1, characterized in that: eight sections of buoyancy tanks are annularly arranged around the concrete transition section, and two adjacent sections of buoyancy tanks are connected together through connecting rods.

5. The marine wind turbine composite cylinder foundation towing structure according to claim 1, characterized in that: each section of the buoyancy tank is internally provided with at least one water-proof cabin, and each water-proof cabin of the buoyancy tank is independently provided with an air charging and discharging valve and a water charging and discharging valve.