Fan platform anchoring system and construction method
By installing anchor plates and multiple sets of mooring components on the wind turbine platform, combined with the design of mooring chains and counterweights, the problem of instability in mooring systems in shallow silty waters has been solved, achieving higher stability and power generation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-04-07
AI Technical Summary
Conventional catenary mooring systems are prone to instability in shallow, silty waters due to the soft texture of the silt and the ease with which the anchoring foundation can be pulled away.
The wind turbine platform mooring system includes anchor plates, multiple sets of mooring components, mooring chains, and counterweights. The anchor foundation is buried in the water, and the counterweights are connected to the mooring chains. The multiple sets of mooring components provide stable tension, and the counterweights are used to increase the weight of the mooring chains to reduce the chain length and dynamic response.
It improves the stability of the mooring system, reduces the catenary length, lowers costs, extends the service life of the wind turbine platform, and improves power generation efficiency and system predictability.
Smart Images
Figure CN121799548A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of offshore wind power technology, and in particular to a wind turbine platform mooring system and construction method. Background Technology
[0002] Currently, offshore wind power is developing at an unprecedented pace due to its significant advantages such as abundant resource reserves, high power generation efficiency, and no occupation of land space, becoming an important part of the global energy strategy. The mooring system, as a crucial component of floating wind turbine platforms, is the lifeline of these platforms. It firmly holds the wind turbine to the seabed, ensuring the platform maintains necessary stability under the influence of wind, waves, and currents. Common mooring structures consist of three parts: the mooring foundation, mooring cables, and platform connecting accessories. The mooring foundation primarily provides the final holding force; common foundations include suction anchors, gravity anchors, and holding anchors. Mooring cables are used in various ways, selected according to specific needs. Anchor chain arrangements include catenary (relying on the cable's own weight to naturally sag and form a curve; the restoring force mainly comes from lifting the cable's weight; mostly used in shallow water) and semi-tensioned / tensioned (in deep water, lightweight synthetic fiber ropes are used with a certain pretension to form a tighter configuration, effectively reducing platform movement and displacement).
[0003] Tensioned anchoring systems require more complex technical expertise and incur higher economic costs in terms of anchor foundation design, installation, and maintenance. Therefore, catenary mooring systems remain the primary choice for floating wind turbine mooring systems.
[0004] However, in shallow, silty waters, conventional catenary mooring systems rely solely on anchoring foundations for anchoring force. Due to the soft texture of the silt foundations, these foundations are easily pulled, leading to instability of the wind turbine platform. Summary of the Invention
[0005] The purpose of this invention is to address the problem in the background art where conventional catenary mooring systems in shallow silty sea areas rely solely on anchoring foundations for anchoring force. Due to the soft texture of the silty foundation, the anchoring foundations are easily pulled away, leading to instability of the wind turbine platform. This invention provides a wind turbine platform mooring system and construction method.
[0006] In a first aspect, the present invention provides a wind turbine platform mooring system, including a wind turbine platform, the wind turbine platform being provided with an anchoring plate, the anchoring plate being circumferentially connected to a plurality of mooring components; The mooring component includes a mooring chain, one end of which is connected to the anchoring plate, and the other end of which is connected to an anchoring foundation, which is buried at the bottom of the water. It also includes a counterweight attached to the mooring chain.
[0007] The wind turbine platform mooring system of this embodiment features an anchor plate installed on the wind turbine platform, upon which multiple sets of mooring components are connected. This prevents damage and breakage of a single mooring component due to overload. The multiple sets of mooring components are arranged circumferentially around the anchor plate to provide tension to the wind turbine platform in multiple directions, ensuring stability under the pull of the multiple sets of mooring components and preventing lateral displacement or overturning due to uneven stress. Furthermore, the mooring components include a mooring chain, an anchoring foundation, and a counterweight. One end of the mooring chain is connected to the anchor plate, and the other end is connected to the anchoring foundation, which is buried underwater. The counterweight is connected to the mooring chain. The anchoring foundation, buried underwater, provides tensile strength to the mooring system. Simultaneously, the counterweight increases the weight of the mooring chain. During lifting and lowering, the counterweight dissipates and dampens the kinetic energy transmitted from the wind turbine platform, reducing the tension acting on the anchoring foundation and improving the overall stability of the mooring system.
[0008] The wind turbine platform mooring system of this embodiment effectively solves the problem that ordinary mooring systems are easily pulled in shallow sea silt geology, making it difficult to provide a large anchoring force. Furthermore, traditional anchor chain mooring cables require long catenaries to meet sufficient restoring force. This invention utilizes counterweights, which not only significantly reduces the required catenary length, saving costs, but also reduces the dynamic response of the entire system, increases the stability of the anchoring foundation, and improves fatigue life. At the same time, this invention achieves single-point mooring through anchor plates, enabling the wind turbine platform to keep the turbine facing the wind direction and at an optimal windward angle, increasing annual power generation. It also simplifies and makes the system's stress mode more predictable, greatly reducing alternating stress and thus extending the service life of the wind turbine platform mooring system.
[0009] Preferably, the mooring chain includes a mud-entry section, a leveling section, and a suspension section connected in sequence. The mud-entry section is connected to the anchoring foundation, the leveling section and the suspension section are connected to the anchoring plate, and the counterweight is connected to the suspension section.
[0010] By increasing the weight of the catenary section with counterweights, the catenary section can maintain its downward curve, avoiding excessive tension or slack due to wind and wave disturbances, ensuring the stability of the catenary configuration, and thus ensuring that the restoring force acts continuously and stably on the wind turbine platform.
[0011] Preferably, the number of anchoring components is no less than three sets.
[0012] Wind turbine platforms are susceptible to impacts from wind, waves, and ocean currents from multiple directions. At least three sets of anchoring components can provide tensile constraints to the wind turbine platform from different directions, thus offsetting external loads from different directions.
[0013] Preferably, each set of the mooring components includes at least three mooring chains.
[0014] Each mooring assembly uses at least three mooring chains to evenly distribute the tensile force borne by the anchoring foundation across multiple chains, preventing a single chain from breaking due to excessive load. Simultaneously, the redundant design of multiple mooring chains reduces the impact of a single chain failure on the entire mooring assembly, improves system fault tolerance, and ensures stable operation of the mooring assembly under extreme sea conditions.
[0015] Preferably, the anchoring foundation is a suction anchor.
[0016] Preferably, it further includes drag eye plates, which are circumferentially spaced along the outer edge of the anchor plate, and the mooring chain is anchored to the drag eye plates.
[0017] In a second aspect, the present invention provides a construction method for a wind turbine platform mooring system, which, based on the wind turbine platform mooring system of the present invention, further includes the following steps: S1: Connect the mud-entry section of the mooring chain to the anchoring foundation in advance, and then sink the anchoring foundation to the bottom of the water; S2: Laying the flat section of the mooring chain on the seabed using a crane vessel; S3: After the flat section is laid, connect one end of the flat section to the mud entry section, connect the suspension section of the chain conveyor on the blower platform, and then reconnect the other end of the flat section to the suspension section. S4: Sink the counterweight to the seabed and connect it to the catenary segment.
[0018] Preferably, in S2, the laying of the flat section includes the following steps: S21: Transport multiple single-section mooring chain segments to the crane ship, then use the crane ship's hook to lift a single-section mooring chain segment, connect one end of the single-section mooring chain segment to the winch wire rope on the ship, and pass the other end of the single-section mooring chain segment through the first chain clamp on the ship and fix it. S22: Start the winch, slowly tighten the anchor chain to apply force, then release the first chain tensioner and prepare for lowering; S23: Synchronous ship transfer and lowering: The crane ship moves along the direction of the mooring chain laying and works in coordination with the winch to slowly lower the single section of the mooring chain to ensure that it is laid to the seabed according to the design path; S24: Continue laying single-section berth chain. When the single-section berth chain on the crane vessel is less than the preset length, stop lowering and lock the first chain retainer. Repeat S21-S24 to continue laying subsequent single-section berth chain segments until the laying of the flat section of the berth chain is completed.
[0019] Preferably, in S3, the reconnection of the mooring chain includes the following steps: S31: Drag the wind turbine platform to the area away from the design position, and connect the catenary segment to the second chain connector of the wind turbine platform; S32: The horizontal section is retrieved onto the deck by the crane vessel, and then the horizontal section is connected to the overhead chain section; S33: Connect the catenary segment on the wind turbine platform to the hook of the crane vessel, and then control the hook of the crane vessel to pull the catenary segment through the second chain retractor to gradually retract the catenary segment until the tension of the part of the catenary segment in the water meets the design requirements.
[0020] Preferably, in S4, the catenary segment is first lifted by the winch of the crane vessel, then the counterweight is lifted by the hook of the crane vessel and lowered to the seabed for contact, and then the anchor chain of the counterweight is connected to the catenary segment. After the counterweight is connected to the catenary segment, the winch lowers the catenary segment.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The wind turbine platform mooring system of the present invention includes an anchor plate installed on the wind turbine platform, and multiple sets of mooring components connected to the anchor plate. This avoids damage and breakage of a single mooring component due to overload. The multiple sets of mooring components are arranged circumferentially around the anchor plate to provide tension to the wind turbine platform in multiple directions, ensuring stability under the pull of the multiple sets of mooring components and preventing lateral displacement or overturning due to uneven stress. Furthermore, the mooring components include a mooring chain, an anchoring foundation, and a counterweight. One end of the mooring chain is connected to the anchor plate, and the other end is connected to the anchoring foundation, which is buried underwater. The counterweight is connected to the mooring chain. The anchoring foundation, buried underwater, provides tensile strength to the mooring system. Simultaneously, the counterweight increases the weight of the mooring chain. During the lifting and lowering process, the counterweight can dissipate and dampen the kinetic energy transmitted from the wind turbine platform, reducing the dynamic response of the entire mooring system and improving its stability. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the wind turbine platform anchoring system of the present invention.
[0023] Figure 2 yes Figure 1 A schematic diagram of the connection of a single anchoring component.
[0024] Figure 3 yes Figure 1 A magnified view of part A.
[0025] Figure 4 This is a schematic diagram of the connection between the mooring chain and the anchor plate.
[0026] Figure 5 This is a schematic diagram of the anchor foundation hoisting.
[0027] Figure 6 This is a plan view of the chain reconnection.
[0028] Figure 7 This is a side view diagram of the chain reconnection.
[0029] Figure 8 This is a schematic diagram of the completed chain reconnection.
[0030] Figure 9 This is a diagram showing the tensioning after the chain is reconnected.
[0031] Figure 10 This is a schematic diagram of the installation of the Peng counterweight.
[0032] Marked in the image: 1-Wind turbine platform, 2-Moor chain, 21-Mud entry section, 22-Lying flat section, 23-Suspension chain section, 3-Anchoring foundation, 4-Counterweight, 5-Anchor plate, 6- Crane ship, 7-First Linker, 8-Winder 9-Second linker, 10-Drag force eyeplate. Detailed Implementation
[0033] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0034] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.
[0035] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are set as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," "parallel," or "coaxial" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.
[0036] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0037] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, nine, or even more than nine.
[0038] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0039] Example 1 like Figures 1-4 As shown, a wind turbine platform mooring system includes a wind turbine platform 1, the wind turbine platform 1 is provided with an anchor plate 5, and the anchor plate 5 is circumferentially connected with multiple sets of mooring components. The mooring components include a mooring chain 2, one end of which is connected to an anchoring plate 5, and the other end of which is connected to an anchoring foundation 3, which is buried in the seabed. It also includes a counterweight 4, which is connected to the chain 2.
[0040] In this embodiment, the wind turbine platform mooring system has an anchoring plate 5 installed on the wind turbine platform 1. Multiple sets of mooring components are then connected to the anchoring plate 5 to prevent damage or breakage of a single mooring component due to overload. These multiple sets of mooring components are arranged circumferentially around the anchoring plate 5 to provide tension to the wind turbine platform 1 in multiple directions. This ensures the stability of the wind turbine platform 1 under the tension of the multiple sets of mooring components, preventing lateral displacement or overturning due to uneven stress. Furthermore, the mooring components include a mooring chain 2 and an anchoring base. The anchoring system consists of a base 3 and a counterweight 4. One end of the mooring chain 2 is connected to the anchoring plate 5, and the other end of the mooring chain 2 is connected to the anchoring base 3, which is buried at the bottom of the water. The counterweight 4 is connected to the mooring chain 2. The anchoring base 3 provides tensile strength to the mooring system. At the same time, the counterweight 4 increases the weight of the mooring chain 2. During the lifting and lowering process, the counterweight 4 can consume and dampen the power energy transmitted from the wind turbine platform 1, reduce the tensile force acting on the anchoring base 3, and improve the stability of the entire mooring system.
[0041] The wind turbine platform mooring system of this embodiment effectively solves the problem that ordinary mooring systems are easily pulled in shallow sea silt geology, making it difficult to provide a large anchoring force. Furthermore, traditional anchor chain mooring cables require long catenaries to meet sufficient restoring force. This invention utilizes counterweight 4, which not only significantly reduces the required catenary length, saving costs, but also reduces the dynamic response of the entire system, increases the stability of the anchoring foundation 3, and improves fatigue life. At the same time, this invention achieves single-point mooring through anchoring plate 5, enabling the wind turbine platform 1 to keep the wind turbine facing the wind direction and at an optimal windward angle, increasing annual power generation and making the system's stress mode simpler and more predictable, greatly reducing alternating stress, thereby extending the service life of the wind turbine platform mooring system.
[0042] Specifically, in this embodiment, the anchoring foundation 3 is a suction anchor. The suction anchor creates negative pressure by pumping out the internal seawater, which can tightly adhere to and embed itself in the silt foundation. Compared with the traditional gravity anchor, it can make more efficient use of the side friction and end resistance of the silt foundation, and its pull-out resistance as the anchoring foundation 3 is stronger.
[0043] The suction anchor, as the anchoring foundation 3, is the connection point between the entire mooring system and the seabed, providing the final tensile strength; after the mooring chain 2 is installed, it will naturally form a suspension curve (catenline) underwater due to its own weight, which can provide strong restoring force for the entire mooring system; The counterweight 4 is connected in series with the chain 2 to change the shape and stress characteristics of the chain 2. Its core advantage is: 1. Significantly increased restoring force: The mass of counterweight 4 is much greater than that of chain 2 of the same length, and it requires a huge amount of energy to lift it, which provides extremely strong restoring force for the wind turbine platform 1. 2. Optimize the shape of the mooring chain 2: When under force, the counterweight 4 forces the mooring chain 2 to form a steeper angle near the counterweight 4. This makes the suction anchor mainly bear the horizontal tension and avoid the vertical upward pulling force, so as to give full play to the advantages of the suction anchor. 3. Reduce the amount of chain 2 used: Since the counterweight 4 provides most of the restoring force, the total length of the required chain 2 can be reduced, thereby reducing the total cost and weight of the system.
[0044] 4. Energy absorption and vibration reduction: The process of lifting and lowering the counterweight 4 can consume and dampen the power energy transmitted from the wind turbine platform 1, reduce the power response of the entire mooring system, and improve fatigue life.
[0045] Furthermore, the wind turbine platform mooring system of the present invention adopts an engineering balance design, specifically as follows: In static state: counterweight 4 sits on the bottom, chain 2 is in a natural suspension form, and the fan platform 1 is stably fixed in the target position.
[0046] In dynamic mode: wind, waves, and currents propel the wind turbine platform 1, which in turn drags the mooring chain 2. The energy transmitted by the wind turbine platform 1 is first used to lift the counterweight 4. The counterweight 4 consumes a large amount of the energy transmitted by the wind turbine platform 1, and the remaining energy is converted into a pulling force on the suction anchor.
[0047] After dynamic response: After the tension weakens, the gravity of the counterweight 4 becomes the main restoring force, pulling the wind turbine platform 1 back to its original position and restoring the mooring chain 2 to its natural catenary shape.
[0048] In one or more implementations, such as Figure 2 As shown, the mooring chain 2 includes a mud-entry section 21, a lying-flat section 22, and a suspension chain section 23 connected in sequence. The mud-entry section 21 is connected to the anchor foundation 3, the lying-flat section 22 and the suspension chain section 23 are connected to the anchor plate 7, and the counterweight block 4 is connected to the suspension chain section 23.
[0049] By increasing the weight of the catenary segment 23 by counterweight 4, the catenary segment 23 can maintain its downward curve, avoiding excessive tension or slack of the catenary segment 23 due to wind and wave disturbances, ensuring the stability of the catenary configuration, and thus ensuring that the restoring force acts continuously and stably on the wind turbine platform 1.
[0050] In one or more implementations, such as Figure 1 As shown, the number of anchoring components is no less than three sets. The wind turbine platform 1 is susceptible to impacts from wind, waves, and ocean currents from multiple directions. No less than three sets of anchoring components can provide tensile constraints on the wind turbine platform 1 from different directions, offsetting external loads from different directions.
[0051] Furthermore, such as Figure 4 As shown, each set of mooring components includes at least three mooring chains 2.
[0052] Each mooring component uses at least three mooring chains 2 to evenly distribute the tensile force borne by the anchoring foundation 3 across multiple mooring chains, preventing a single mooring chain from breaking due to excessive load. Simultaneously, the redundant design of multiple mooring chains reduces the impact of a single mooring chain failure on the entire mooring component, improves system fault tolerance, and ensures stable operation of the mooring component under extreme sea conditions.
[0053] In one or more embodiments, it also includes a drag eye plate 10, which is circumferentially spaced along the outer edge of the anchor plate 5, and the mooring chain 2 is anchored on the drag eye plate 10.
[0054] Example 2 like Figures 5-10 As shown, based on Embodiment 1, this embodiment discloses a construction method for a wind turbine platform mooring system. The wind turbine platform mooring system based on this invention further includes the following steps: S1: Connect the mud-entry section 21 of the mooring chain 2 to the anchoring foundation 3 in advance, and then sink the anchoring foundation 3 to the bottom of the water, such as... Figure 1 ; The specific steps are as follows: S11: Crane vessel 6 hoists anchor foundation 3 onto the pre-set base on the deck of transport vessel, seals and reinforces it, and then transports it to the construction site; S12: After the crane vessel 6 anchors and positions itself, the transport ship berths. First, the auxiliary hook of the crane vessel 6 is used to install the mud section 21 of the mooring chain 2 on the anchoring foundation 3. Then, the main hook of the crane vessel 6 lifts the anchoring foundation 3 and the auxiliary hook lifts the mud section 21. The two hooks work together to lift the anchoring foundation 3 and the mud section 21 simultaneously and move them to the other side of the ship. S13: Place anchoring base 3 into the water so that the top of the anchor is flush with the deck. Install pump skid, underwater beacon and other facilities on the top of the anchor. Before entering the water, complete the test to ensure that it is normal. At the same time, tie the adjustment cables on both sides of anchoring base 3. S14: After adjusting the position and verticality of anchor foundation 3, lower it into the mud. Divers monitor the entire process, pausing before contact with the mud to check the position, verticality, and orientation. Once confirmed to be correct, begin the self-weight-based mud entry. After self-stabilization, start the pump skid for negative pressure penetration until the design depth is reached.
[0055] S2: Laying the flat section 22 of the mooring chain 2 on the seabed by using the crane vessel 6; Specifically, before the crane vessel 6 enters the site for operation, side guide rollers, first chain puller 7, and winch 8 for berthing and unwinding of anchor chain 2 are installed at the dock for anchor chain laying. In S2, the laying of the flat section 22 includes the following steps: S21: Transport multiple single-section mooring chain segments to the crane vessel 6, then use the hook of the crane vessel 6 to lift a single-section mooring chain segment, connect one end of the single-section mooring chain segment to the traction wire rope of the winch 8, and pass the other end of the single-section mooring chain segment through the first chain clamp 7 on the ship and fix it. S22: Start the winch 8, slowly tighten the anchor chain to make it bear force, then release the first chain retainer 7, and prepare for lowering; S23: Synchronous ship transfer and lowering: The crane ship 6 moves along the laying direction of the mooring chain 2, and at the same time works in coordination with the winch 8 to slowly lower the single section of the mooring chain to ensure that it is laid to the seabed according to the design path; S24: Continue laying single-section berth chain. When the single-section berth chain on the crane vessel 6 is less than the preset length, stop lowering and lock the first chain retainer 7. Repeat S21-S24 to continue laying subsequent single-section berth chain segments until the laying of the flat section 22 of berth chain 2 is completed.
[0056] S3: After the leveling section 22 is laid, connect one end of the leveling section 22 to the mud entry section 21, and connect the suspension section 23 of the chain conveyor 2 to the blower platform 1. Then, reconnect the other end of the leveling section 22 to the suspension section 23. Figures 6-9 ; In S3, the reconnection of chain 2 includes the following steps: S31: Drag the wind turbine platform 1 to the area away from the design position, and connect the suspension chain segment 23 to the second chain link 9 of the wind turbine platform 1; Specifically, the wind turbine platform 1 is first towed to a position close to the design location. The transport vessel and anchor boat then pull nylon cables from the main and auxiliary work vessels to the wind turbine. These nylon cables are used to pull back the polymer cables pre-attached to the wind turbine to the main and auxiliary work vessels. The main and auxiliary work vessels then apply tension to the cables, releasing the auxiliary tugboats from the wind turbine platform. The main and auxiliary work vessels then anchor and approach the floating power generation platform within approximately 50 meters, securing the wind turbine platform 1 with its cables. This completes the initial cable-laying and wind turbine stabilization work, achieving temporary fixation of the wind turbine platform 1. S32: The lying section 22 is retrieved to the deck by the crane vessel 6, and then the lying section 22 is connected to the suspension section 23; After the wind turbine platform 1 is limited, the mooring chain 2 is reconnected. The crane vessel 6 retrieves the lying section 22 to the deck and uses a crane to lift the end of the suspension chain section 23 of the wind turbine platform 1 to the deck and connect it with the lying section 22.
[0057] S33: Connect the suspension chain segment 23 on the wind turbine platform 1 to the hook of the crane vessel 6, and then control the hook of the crane vessel 6 to pull the suspension chain segment 23 through the second chain puller 9 of the wind turbine platform 1 to gradually retract the suspension chain segment 23 until the tension of the suspension chain segment 23 in the water meets the design requirements.
[0058] After the crane vessel 6's hook is connected to the suspension chain segment 23 passing through the second chain clamp 9 via the lifting wire rope, the crane vessel 6 adjusts its position and lifts the hook with force (the hook should be vertically collinear with the second chain clamp 9). Each link of the suspension chain segment 23 will be automatically clamped after passing through the clamping device of the second chain clamp 9. On-site, the hook is used to connect to the suspension chain segment 23 on the second chain clamp 9, and the hook is controlled to slowly lift the suspension chain segment 23. The suspension chain segment 23 located below the second chain clamp 9 is gradually tightened until the design tension value is reached, at which point the hook stops lifting.
[0059] After the anchor chain is tensioned, mark any excess anchor chain on the platform end.
[0060] S4: Lower counterweight 4 to the seabed and connect it to the catenary segment 23, as follows: Figure 10 .
[0061] First, the suspension chain segment 23 is lifted by the winch 8 of the crane vessel 6. Then, the counterweight block 4 is lifted by the hook of the crane vessel 6 and lowered to the seabed for contact. Then, the anchor chain of the counterweight block 4 is connected to the suspension chain segment 23. After the counterweight block 4 is connected to the suspension chain segment 23, the winch 8 lowers the suspension chain segment 23.
[0062] Specifically, before installing counterweight 4, divers go underwater to mark the suspension chain section 23. Then, underwater, the divers assist in connecting the winch 8's pulling wire rope. The winch 8's pulling wire rope is connected to the suspension chain section 23, and the winch 8 then hoists the suspension chain section 23 so that the marked anchor chain is 2.5 meters above the mud surface. The divers surface, and the crane on the crane vessel 6 lifts counterweight 4 and lowers it along the buoy position until counterweight 4 touches the mud. The divers go underwater and, according to the actual position, direct the crane to make minor adjustments, connecting the anchor chain of counterweight 4 to the suspension chain section 23 at the marked location. After connection, the mark and the hook of counterweight 4 are released, and the winch 8's pulling wire rope is lowered to restore the suspension chain section 23 to its underwater suspension state. After the pulling wire rope connection is released, the divers surface.
[0063] In an optional implementation, in S2, to facilitate monitoring of the status of the chain 2, conspicuous white markings and numerical markers are made on the same side of every other link to observe the torsion and length changes of a single chain segment in real time.
[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A wind turbine platform mooring system, characterized in that, Includes a wind turbine platform (1), the wind turbine platform (1) is provided with an anchor plate (5), the anchor plate (5) is circumferentially connected with multiple sets of anchoring components; The anchoring component includes a mooring chain (2), one end of which is connected to the anchor plate (5), and the other end of which is connected to an anchoring foundation (3), which is buried at the bottom of the water. It also includes a counterweight (4) which is connected to the chain (2).
2. The wind turbine platform mooring system according to claim 1, characterized in that, The mooring chain (2) includes a mud-entry section (21), a flat section (22), and a suspension section (23) connected in sequence. The mud-entry section (21) is connected to the anchor foundation (3), the flat section (22) and the suspension section (23) are connected to the anchor plate (5), and the counterweight (4) is connected to the suspension section (23).
3. The wind turbine platform mooring system according to claim 1, characterized in that, The number of anchoring components shall be no less than three sets.
4. The wind turbine platform mooring system according to claim 1, characterized in that, Each set of mooring components includes at least three mooring chains (2).
5. A wind turbine platform mooring system according to claim 1, characterized in that, The anchoring foundation (3) is a suction anchor.
6. A wind turbine platform mooring system according to claim 1, characterized in that, It also includes a drag eye plate (10), which is circumferentially spaced along the outer edge of the anchor plate (5), and the mooring chain (2) is anchored on the drag eye plate (10).
7. A construction method for a wind turbine platform mooring system, characterized in that, The wind turbine platform mooring system according to any one of claims 1-6 further includes the following steps: S1: Connect the mud section (21) of the mooring chain (2) to the anchor foundation (3) in advance, and then sink the anchor foundation (3) to the bottom of the water; S2: The flat section (22) of the mooring chain (2) is laid on the seabed by a crane vessel (6); S3: After the flat section (22) is laid, one end of the flat section (22) is connected to the mud entry section (21), and the suspension chain section (23) of the mooring chain (2) is connected on the blower platform (1). Then the other end of the flat section (22) is reconnected to the suspension chain section (23). S4: Sink the counterweight (4) to the seabed and connect it to the suspension chain segment (23).
8. The construction method of a wind turbine platform mooring system according to claim 7, characterized in that, In S2, the laying of the flat section (22) includes the following steps: S21: Transport multiple single-section mooring chain segments to the crane ship (6), then use the hook of the crane ship (6) to lift a single-section mooring chain segment, connect one end of the single-section mooring chain segment to the traction wire rope of the winch (8) on the ship, and pass the other end of the single-section mooring chain segment through the first chain clamp (7) on the ship and fix it. S22: Start the winch (8), slowly tighten the anchor chain to make it bear force, and then release the first chain retainer (7) to prepare for lowering; S23: Synchronous ship transfer and lowering: The crane ship (6) moves along the laying direction of the mooring chain (2) and works in coordination with the winch (8) to slowly lower a single section of the mooring chain to ensure that it is laid to the seabed according to the design path; S24: Continue laying single-section berth chain segments. When the single-section berth chain segment on the crane vessel (6) is less than the preset length, stop lowering and lock the first chain retainer (7). Repeat S21-S24 to continue laying subsequent single-section berth chain segments until the laying of the flat section (22) of the berth chain (2) is completed.
9. A construction method for a wind turbine platform mooring system according to claim 8, characterized in that, In S3, the reconnection of the chain (2) includes the following steps: S31: Drag the wind turbine platform (1) to the area away from the design position and connect the suspension chain segment (23) on the second chain link (9) of the wind turbine platform (1). S32: The lying section (22) is retrieved onto the deck by the crane vessel (6), and then the lying section (22) is connected to the catenary section (23); S33: Connect the suspension chain segment (23) on the wind turbine platform (1) to the hook of the crane vessel (6), and then control the hook of the crane vessel (6) to pull the suspension chain segment (23) through the second chain reel (9) of the wind turbine platform (1) to gradually retract the suspension chain segment (23) until the tension of the suspension chain segment (23) in the water meets the design requirements.
10. A construction method for a wind turbine platform mooring system according to claim 8, characterized in that, In S4, the catenary segment (23) is first lifted by the winch (8) of the crane vessel (6), and then the counterweight (4) is lifted by the hook of the crane vessel (6) and lowered to the seabed. The anchor chain of the counterweight (4) is then connected to the catenary segment (23). After the counterweight (4) is connected to the catenary segment (23), the winch (8) lowers the catenary segment (23).