CN212243734U - Self-installation floating type fan foundation anchored by bucket foundation - Google Patents
Self-installation floating type fan foundation anchored by bucket foundation Download PDFInfo
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- CN212243734U CN212243734U CN202020330036.7U CN202020330036U CN212243734U CN 212243734 U CN212243734 U CN 212243734U CN 202020330036 U CN202020330036 U CN 202020330036U CN 212243734 U CN212243734 U CN 212243734U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The utility model provides a self-installing floating type fan foundation anchored by a barrel-shaped foundation, which comprises a floating platform and a barrel-shaped foundation, wherein an offshore wind turbine is fixed on the floating platform, the lower part of the barrel-shaped foundation is embedded into a seabed, the floating platform is connected with the barrel-shaped foundation below through a plurality of tensioned anchoring cables, the floating platform is arranged between the top surface and the bottom surface of the floating platform at the seabed, and the floating platform is provided with an adjustable ballast tank; the floating platform is provided with an anchor machine and a chain locker, which can adjust the length of the anchoring cable and realize the self-installation of the anchoring system. The utility model can adopt a self-installation construction method, the wind turbine generator, the floating platform and the anchoring system can be installed in one step, a large hoisting ship loader does not need to be dispatched, the construction efficiency is high, and the cost and the risk of offshore construction operation are greatly reduced; under towing installation and working conditions, the gravity center of the whole structure can be lower than the floating center, so that the structure has good stability and strong capability of resisting the wind, wave and flow load of the marine environment.
Description
Technical Field
The utility model relates to a float formula fan basis from installation is applicable to offshore wind power development field, especially the open sea wind power generation field of the depth of water more than 40 meters.
Background
With the continuous development of offshore wind power to deep and distant sea, the floating foundation has the characteristics of high installation speed, strong water depth adaptability and batch construction. When the water depth exceeds a certain degree, the offshore wind turbine foundation adopting the floating ocean platform has obvious economic benefit advantages. However, the offshore wind turbine is in a severe marine environment for a long time, and is subjected to dynamic loads of waves and ocean currents and huge horizontal force transmitted by the wind turbine generator, so that the floating foundation and the anchoring system are required to have huge bearing capacity. And the service life of the offshore wind turbine is longer than that of an offshore oil-gas platform, generally 25 years, the traditional anchoring system cannot meet the requirement of long-term service, and the later maintenance cost is very high. The technical application of the existing floating type fan foundation has the following technical problems:
1) in order to resist huge overturning moment caused by horizontal wind force acting on the height position of a fan hub, the floating fan foundation continuously increases the geometric dimension to increase the area of a water plane, so that the foundation has large steel consumption, high construction cost and complex working procedures, and the application of a large-capacity wind turbine is limited;
2) the permanent anchoring system usually comprises a plurality of anchor bodies and a plurality of anchor chains, and the permanent anchoring system needs to be installed in advance before construction, so that the construction cost is high, and the period is long;
3) in order to reduce the offshore operation procedures, the floating wind turbine is generally connected between a floating foundation platform and an upper wind turbine at a dock or a dock and is wet-towed to an installation site. The gravity center of the whole structure is higher and the stability is poorer in the hauling process, the transportation and installation risks are increased, the weather requirement is high, and the construction window period is short.
4) The traditional anchoring system is easy to cyclically weaken under marine power load, and even has dangerous conditions of cable breaking, anchor walking and the like under severe weather, thereby causing serious consequences.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reasonable, effectual showy formula fan foundation to simplify construction process, reduce construction cost, reduce the risk in construction period and the service period, ensure reliability and economic nature among its actual engineering application.
According to the utility model discloses an aspect, the utility model provides a formula fan basis is floated to self-installing of bucket shape basis anchor, its characterized in that: the offshore wind power generation system comprises a floating platform and a barrel-shaped foundation, wherein an offshore wind power generation unit is fixed on the floating platform, the lower part of the barrel-shaped foundation is embedded into a seabed to provide bearing capacity required by anchoring positioning, the floating platform is connected with the barrel-shaped foundation below through a plurality of tensioned anchoring cables, the floating platform is arranged at the sea level between the top surface and the bottom surface of the floating platform, and an adjustable ballast tank is arranged on the floating platform; the floating platform is provided with an anchor machine and a chain locker, the length of the anchoring cable can be adjusted, the anchor chain can be tightened and loosened through twisting and pulling, the distance between the floating platform and the barrel-shaped foundation can be adjusted, the pretension in the anchoring cable can be adjusted after the anchor chain is tightened, and the self-installation of the anchoring system is realized. The utility model discloses a fan foundation overall structure can adopt the self-installation construction method, and wind turbine generator system, floating platform and mooring system can be installed step by step, need not to dispatch large-scale hoist and mount ship machine, and the efficiency of construction is high, has greatly reduced the cost and the risk of offshore construction operation; under towing installation and working conditions, the gravity center of the whole structure can be lower than the floating center, so that the structure has good stability and strong capability of resisting the wind, wave and flow load of the marine environment.
The floating platform is in a circular truncated cone shape with a small upper part and a big lower part so as to improve the motion performance of the structure. The upper part of the circular truncated cone is used for connecting an upper structure, the lower part of the circular truncated cone is provided with a ballast tank, and the bottom of the circular truncated cone is connected with an anchoring cable. Furthermore, the floating platform is divided into an upper empty tank, a middle adjustable ballast tank and a lower fixed ballast tank; ballast materials such as iron ore or high-density concrete and the like can be arranged in the fixed ballast tank, so that the center of gravity of the floating structure is obviously reduced, and the stability is improved; the adjustable ballast tank is internally provided with a ballast pump, the displacement of the floating structure is changed by pumping water inwards or draining water outwards, and ballast water in the tank is increased or reduced, so that the floating platform has different buoyancy under different working conditions, and the draft requirements under different working conditions are met.
The anchoring system of the wind turbine foundation comprises the anchor machine, an anchoring cable and a barrel-shaped foundation; the mooring cables are symmetrically arranged around the center line of the foundation, the lower barrel-shaped foundation is hung on the mooring cables under the towing working condition, the mooring cables are tensioned under the operating working condition to provide restoring force for resisting marine environmental loads, and the mooring cables have good stability under different wind directions and wave directions, so that the power generation efficiency is ensured, and the offshore wind resource development benefit is improved.
The barrel-shaped foundation comprises a lower barrel wall, an upper barrel wall and a middle partition plate, and lifting lugs with the same number are arranged at the top of the barrel-shaped foundation and are used for connecting anchoring cables; the lower barrel wall is embedded into the seabed, the upper barrel wall and the middle partition plate form a container, a concrete balance weight is pre-arranged in the container to ensure the bearing capacity of the anchoring foundation, the bearing capacity of the barrel-shaped foundation is higher than that of a common anchoring foundation, and the foundation has higher anti-overturning capacity by matching with concrete ballast and can be safely used for installing a large-capacity offshore wind turbine; in the installation process, a submersible pump can be adopted to pump water outwards from a water pumping hole, the installation is carried out through the internal and external pressure difference, and the sealing is carried out after the installation is finished; in the towing process, compressed air can be pumped inwards through the water pumping holes, so that the buoyancy of the barrel-shaped foundation is increased, and the transportation is facilitated.
The utility model provides a float formula fan basis can adopt from the installation method construction installation, divide into equipment, wet several stage steps that drag, sink, fix. Firstly, completing the construction of a floating platform and an anchoring system on land; the connection between the mooring cable and the barrel-shaped foundation and the floating platform and the outfitting of the wind turbine generator are completed at the wharf; reducing the draft of the floating foundation by adjusting the ballast of the floating platform and winching the anchoring cable through an anchor machine, and towing the integral structure to a construction sea area by a tugboat after the bucket foundation is suspended below the floating platform; after the anchor machine releases the anchoring cable to lower the barrel-shaped foundation, the submersible pump is adopted to pump water to the embedded seabed section of the barrel-shaped foundation to complete the installation of the anchoring foundation, the anchor machine tensions the anchoring cable and adjusts the ballast of the floating platform, so that the sea level is positioned between the top surface and the bottom surface of the floating platform, namely, the one-step self-installation work is completed, and the offshore operation period is shortened.
And the wind turbine generator, the floating platform and the anchoring system can be installed in one step, all parts are hoisted and connected at the wharf, a large hoisting ship machine does not need to be dispatched, the construction efficiency is high, and the cost and risk of offshore construction operation are greatly reduced.
In the towing process, compressed air can be pumped into the barrel-shaped foundation from the water pumping hole to the lower part of the barrel-shaped foundation, so that the buoyancy of the barrel-shaped foundation is increased, and the barrel-shaped foundation is convenient to transport. And gradually loosening the anchoring cable in the construction sea area, pumping outwards after the barrel-shaped foundation contacts the surface of the sea bed, and further pumping water to enable the barrel-shaped foundation to penetrate into the sea bed under the action of internal and external pressure difference.
Furthermore, the submersible pump is used for reversely pumping water to remove the water, so that the secondary utilization and the operation maintenance of the floating fan foundation are facilitated.
To sum up, the utility model discloses technical problem that technical scheme solved includes:
1) the construction process of foundation construction and installation of the offshore floating type wind turbine is simplified, the construction efficiency is improved, and therefore the cost of the offshore operation ship is reduced.
2) The safety that the anchoring foundation receives complex dynamic load during the long-term service of the offshore wind turbine is guaranteed, and floating foundation anchor walking is avoided.
3) The gravity center height of the whole offshore wind turbine structure is reduced, the structure geometric dimension is reduced, the stability of the floating wind turbine during hoisting, transportation, construction and service is improved, and the safety and stability of the structure are guaranteed.
4) The structure size and the arrangement of the anchoring system of the floating foundation are optimized, the restoring force of the floating foundation during movement is increased, and the movement amplitude of the floating fan structure is reduced.
Drawings
Figure 1 is the utility model discloses tow three-dimensional schematic diagram of boat operating mode.
Fig. 2 is the utility model discloses operating condition's three-dimensional schematic diagram.
Fig. 3 is the layout of the floating foundation of the present invention.
Fig. 4 is the layout of the anchoring system of the utility model.
Detailed Description
To further illustrate the contents, features and functions of the present invention, an embodiment is described below with reference to the accompanying drawings.
(1) As shown in fig. 1, the present embodiment includes the following components: the wind turbine generator system comprises a wind turbine generator set 1, a fan tower 2, a transition section 3, a floating platform 4, an anchoring cable 5 and a barrel-shaped foundation 6.
The upper part of the embodiment is provided with a large-scale offshore wind turbine generator 1 which comprises a blade 1-1, a hub 1-2, a cabin 1-3 and other parts, and the wind turbine generator 1 is connected to a tower 2 through a top flange 2-1. The hoisting and debugging of the wind turbine generator 1 are carried out on land, and a large hoisting ship loader does not need to be dispatched during offshore operation, so that the offshore construction efficiency is improved. The tower frame 2 is a cylindrical structure and is used for supporting a wind turbine generator and storing electrical equipment; the lower part is provided with a bottom flange 2-2 for connecting a transition section 3, the tower frame 2 is fixed on the top of the floating platform through the transition section 3 and used as the foundation of the offshore wind turbine generator system, the transition section 3 is of a steel truss structure or a box girder structure, the size of the upper part is consistent with the outer diameter of the tower frame 2, and the lower part is connected with an upper deck surface 4-1 of the floating platform 4.
The floating platform structure is in a circular truncated cone shape with a small upper part and a big lower part, the buoyancy of the floating platform is designed to be that an average sea level is positioned between the top surface and the bottom surface so as to improve the movement performance of the structure, and the floating platform comprises an upper deck 4-1, an anchor machine 4-2, an empty tank 4-3, an adjustable ballast tank 4-4, a fixed ballast tank 4-5, an anchor chain tank 4-6 and a cable guide device 4-7. The anchor machine 4-2 is arranged on the upper deck 4-1, a single anchor machine corresponds to one or two anchoring cables 5, and the anchoring cables 5 can be tightened or loosened through hydraulic twisting and pulling. The mooring cables 5 are symmetrically arranged around the center of the foundation, and the number of the mooring cables is 6-12. The adjustable ballast tanks 4-4 adopt seawater as ballast, and a built-in ballast pump can realize inward pumping or outward drainage, so that the drainage quantity of the floating structure is changed to meet the draft requirements under different working conditions; the fixed ballast tanks 4-5 adopt high-density concrete or iron ore as ballast, ballast installation is completed on land, and the ballast tank has larger mass to reduce the gravity center of the floating body and increase the stability of the whole structure. Chain locker 4-6 is arranged in the vessel, preferably at the periphery of the vessel, to enable mooring lines 5 to provide a greater moment against overturning, and at the same time facilitate the arrangement of mooring lines and anchors, chain locker 4-6 being at its upper end at the end of anchor 4-2 and at its lower end connected to fairlead 4-7 at the bottom of vessel 4 for mooring lines 5 to pass through. The mooring cable 5 is connected with the floating foundation 4 and the barrel-shaped foundation 6, is used as a medium for transmitting marine environment load to the foundation and the seabed, and realizes different functions by adjusting the length of the mooring cable 5 through the anchor machine 4-2 under different working conditions such as towing, installation, operation and the like. The barrel-shaped foundation 6 comprises a top lifting lug 6-1, an upper barrel wall 6-2, a concrete counterweight 6-3, a partition plate 6-4, a lower barrel wall 6-5 and a water pumping hole 6-6. The lifting lugs 6-1 are used for connecting anchoring cables 5, and the upper barrel wall 6-2, the partition plate 6-4 and the lower barrel wall 6-5 are of steel structures. A concrete counterweight 6-3 is pre-installed in the upper barrel wall 6-2 to increase the bearing capacity of the foundation; the lower barrel wall is embedded into the seabed after the installation is completed, and the anchoring effect is achieved. The water pumping holes 6-6 are used for pumping water outwards in the installation process or pumping seawater inwards in the dismantling process, and are closed after installation is finished.
(2) The embodiment completes the construction of the floating platform 4 on land, pours high-density concrete or iron ore as fixed ballast in the fixed ballast tanks 4-5, installs the anchor machine 4-2 on the deck surface 4-1, and welds the transition section 3 on the top of the platform. The upper mooring line 5 is passed from the anchor machine 4-2 through the chain locker 4-6 and connected to the lower part of the fairlead 4-7. The barrel-shaped foundation 6 is synchronously built on land, and concrete counterweight 6-3 is poured between the barrel wall 6-2 and the partition plate 6-4 on the barrel-shaped foundation; after construction, the anchoring cable 5 is connected to the lifting lug, lifted to a port by a gantry crane and lowered on the seabed, and the upper end of the anchoring cable 5 is kept on the sea surface by using the buoy.
(3) The outfitting of the equipment of the embodiment is completed in a dock or a port, and the floating platform 4 is hoisted to the water surface by using a gantry crane. The mooring lines 5 on the sea surface are lifted and connected to the upper mooring lines on the floating platform 4. The anchoring cable 5 is twisted and pulled by the anchor machine 4-2 to have certain pretension to ensure the stability of the floating foundation. The tower frame 2 and the wind turbine generator set 1 are sequentially hoisted through a crane and connected through a bottom flange 2-2 and a top flange 2-1.
(4) The towing condition of this embodiment is shown in fig. 1, at which time the ballast water in the adjustable ballast tanks 4-4 is evacuated, and part of air is injected into the lower tank body (the tank body formed by the partition plates 6-4 and the lower tank walls 6-5) of the bucket foundation 6, so as to increase the buoyancy of the floating foundation and reduce the draft. And the mooring cable 5 is twisted, pulled and tightened, so that the barrel-shaped foundation 6 is suspended below the floating platform 4, the floating foundation is dragged by 2-3 tugboats, and the field construction is carried out from a port to an offshore wind farm.
(5) In the embodiment, the field installation efficiency is high, firstly, the anchoring cable 5 is loosened by the anchor 4-2, the barrel-shaped foundation 6 is lowered to the seabed, water is pumped outwards from the water outlet 6-6 through the submersible pump after being embedded to a certain depth, the internal and external pressure difference is formed in the barrel-shaped foundation, the barrel wall 6-5 under the foundation is fully embedded in the seabed soil, and at the moment, the water pumping port is closed. Partial ballast water is injected into the adjustable ballast tank 4-4 of the floating platform 4, so that the motion stability of the floating foundation is improved. The mooring cable 5 is tensioned by the anchor machine 4-2 until the required pretension level is reached, so that the draft of the floating platform 4 reaches the designed operation requirement, and the field installation work 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 (4)
1. The utility model provides a formula fan foundation is floated to self-erection formula that bucket shape basis anchored which characterized in that: the offshore wind power generation system comprises a floating platform and a barrel-shaped foundation, wherein an offshore wind power generation unit is fixed on the floating platform, the lower part of the barrel-shaped foundation is embedded into a seabed, the floating platform is connected with the barrel-shaped foundation below through a plurality of tensioned mooring cables, the floating platform is arranged at the sea level between the top surface and the bottom surface of the floating platform, and the floating platform is provided with an adjustable ballast tank; the floating platform is provided with an anchor machine and a chain locker, which can adjust the length of the anchoring cable and realize the self-installation of the anchoring system.
2. The bucket foundation anchored self-installing floating wind turbine foundation of claim 1, wherein: the floating platform is in a circular truncated cone shape with a small upper part and a big lower part, and is divided into an empty tank at the upper part, an adjustable ballast tank in the middle and a fixed ballast tank at the lower part; the adjustable ballast tank is internally provided with a ballast pump, and the displacement of the floating structure is changed by pumping water inwards or draining water outwards so as to meet the draft requirements under different working conditions.
3. The bucket foundation anchored self-installing floating wind turbine foundation of claim 1, wherein: the anchoring system comprises the anchor machine, an anchoring cable and a barrel-shaped foundation; the mooring lines are symmetrically arranged around the center line of the foundation.
4. The bucket foundation anchored self-installing floating wind turbine foundation of claim 1, wherein: the barrel-shaped foundation comprises a lower barrel wall, an upper barrel wall and a middle partition plate, and lifting lugs with the same number are arranged at the top of the barrel-shaped foundation and are used for connecting anchoring cables; the lower barrel wall is embedded into the seabed, the upper barrel wall and the middle partition plate form a container, and a concrete balance weight is pre-installed in the container to ensure the bearing capacity of the anchoring foundation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020330036.7U CN212243734U (en) | 2020-03-17 | 2020-03-17 | Self-installation floating type fan foundation anchored by bucket foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020330036.7U CN212243734U (en) | 2020-03-17 | 2020-03-17 | Self-installation floating type fan foundation anchored by bucket foundation |
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| CN212243734U true CN212243734U (en) | 2020-12-29 |
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| CN202020330036.7U Active CN212243734U (en) | 2020-03-17 | 2020-03-17 | Self-installation floating type fan foundation anchored by bucket foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446164A (en) * | 2021-08-10 | 2021-09-28 | 台州衡达科技有限公司 | Offshore wind power structure foundation |
| CN113883013A (en) * | 2021-11-24 | 2022-01-04 | 岭南师范学院 | Make things convenient for offshore wind power generation equipment base of dismouting |
-
2020
- 2020-03-17 CN CN202020330036.7U patent/CN212243734U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446164A (en) * | 2021-08-10 | 2021-09-28 | 台州衡达科技有限公司 | Offshore wind power structure foundation |
| CN113883013A (en) * | 2021-11-24 | 2022-01-04 | 岭南师范学院 | Make things convenient for offshore wind power generation equipment base of dismouting |
| CN113883013B (en) * | 2021-11-24 | 2023-10-03 | 岭南师范学院 | Offshore wind power generation equipment base convenient to assemble and disassemble |
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