A method for limiting and paying out mooring chains for a floating wind platform

Abstract

The application discloses a kind of for floating wind power platform mooring chain limiting and pay-off method, comprising the following steps: when floating wind power platform reaches target sea area, one end of mooring chain is installed in the universal joint at the bottom of the column of floating wind power platform;The other end of mooring chain is placed on the guide bridge and is bent vertically downwards, one end of limiting rigging is connected with the bending place of anchor chain and is limited and fixed, the other end of limiting rigging is connected with the upper and lower parts of anchor chain puller support;When floating wind power platform reaches target sea area, first, the limiting of anchor chain is released;Limiting rigging is disconnected with the upper part of anchor chain puller support, and then the upper structure of anchor chain puller support is removed;One end of pay-off rigging is connected with limiting rigging, and the other end is connected with the steel wire rope of winch;Slowly pay-off mooring chain until all of the anchor chain is paid off underwater.The application can complete the conversion from static rigging pulling anchor chain limiting state to dynamic winch connecting anchor chain pay-off state on the platform.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a method for limiting and deploying mooring anchor chains for floating wind power platforms. Background Technology

[0002] Currently, the installation of a mooring system for a floating wind power platform is a first in China. The positioning and deployment of the platform's mooring anchor chains are crucial aspects of the installation process. Ensuring the safety of the platform's mooring anchor chains during maritime transportation and storage, maintaining high efficiency in the positioning, deployment, and reconnection of the anchor chains, and achieving energy conservation and efficiency throughout the entire process all require the design of a new system and solution. This will provide important reference for the future installation of mooring systems for floating wind power platforms. Summary of the Invention

[0003] The purpose of this invention is to provide a method for limiting and deploying mooring anchor chains for floating wind power platforms. This method allows for the independent conversion of the anchor chain from a static rigging state to a dynamic winch-connected lowering state on the platform, ensuring the safe and rapid lowering of the mooring anchor chain.

[0004] To achieve the objective of this invention, a method for limiting and deploying mooring anchor chains for floating wind power platforms is provided, comprising the following steps:

[0005] S1. Before the floating wind power platform reaches the target sea area, install one end of the mooring anchor chain on the universal joint at the bottom of the floating wind power platform column, and suspend it vertically along the bottom and middle section of the column, and extend it taut and stressed from bottom to top.

[0006] S2. Place the other end of the mooring anchor chain on the guide bridge and bend it vertically downwards. Connect one end of the limiting sling to the bend of the mooring anchor chain and fix it in place. Connect the other end of the limiting sling to the upper and lower parts of the anchor chain tie bracket.

[0007] S3. When the floating wind power platform reaches the target sea area, first release the limit of the mooring anchor chain, disconnect the limit rigging from the upper part of the anchor chain tie bracket, and then dismantle the upper structure of the anchor chain tie bracket.

[0008] S4. Connect one end of the rigging to the limiting rigging and the other end to the wire rope of the winch. Start the winch to pull the mooring anchor chain. Disconnect the limiting rigging from the lower part of the anchor chain tie bracket.

[0009] S5. Start the winch and slowly lower the mooring anchor chain until it is completely submerged. After the underwater ROV has finished its underwater operation, the winch will retrieve the connecting rigging. If the height of the mooring anchor chain needs to be adjusted during the lowering process or in case of an emergency, the winch can also be used for retrieval.

[0010] As a preferred embodiment of the present invention, the guide bridge has a grooved arc-shaped structure; a limit safety pin is provided at one end of the guide bridge near the winch.

[0011] As a preferred embodiment of the present invention, the width of the guide bridge groove is matched with the width of the mooring anchor chain.

[0012] As a preferred embodiment of the present invention, the limiting rigging is a transverse "Y" shape.

[0013] As a preferred embodiment of the present invention, the anchor chain tethering bracket includes three I-beam columns, which are fixedly connected by steel plates; the upper and lower parts of the I-beam columns near the limiting rigging are provided with lifting lugs; and the side of the I-beam columns away from the lifting lugs is fixedly connected to an I-beam diagonal brace.

[0014] As a preferred embodiment of the present invention, the lower part of the I-beam is provided with an I-beam cross brace, and the cross brace is fixedly connected to the diagonal brace; the number of the diagonal braces is three and they are fixedly connected by steel plates.

[0015] Compared with the prior art, the present invention provides a method for limiting and deploying mooring anchor chains for floating wind power platforms, which has the following advantages:

[0016] This system can independently transition from a static anchor chain-tethered state to a dynamic anchor chain-connected state via a winch on the platform without the assistance of external work vessel machinery. This ensures the safe and rapid lowering of the mooring anchor chain, and finally, the rigging can be retrieved, or the mooring anchor chain can be retrieved and adjusted in emergencies. The guide bridge features an ultra-narrow structure and a winged base, making it easy to install, fix, and dismantle while ensuring structural stability. The anchor chain is secured within it, ensuring its stability and safety during long sea voyages and harsh working conditions, and preventing collisions between the anchor chain and the platform columns during the lowering and raising process. The anchor chain tethering bracket has a limit... The rigging system is designed with a vertical tree structure, allowing for layered arrangement of rigging, saving space on the top deck of the platform columns, and facilitating operation. The bottom end of the mooring anchor chain is pre-stored on the platform during manufacturing, eliminating the need for air diving during installation. This eliminates the need for divers to connect the anchor chain ends at the bottom of the floating wind turbine columns, improving construction efficiency and saving costs. The system does not require crane assistance for lowering, solving the problem of maintaining a safe distance between the operating vessel and the floating wind turbine platform without the need for cranes, and also opening up new ideas and methods for installing mooring anchor chains on floating wind turbine platforms. Attached Figure Description

[0017] Figure 1 This is a front view of the limiting state of the present invention;

[0018] Figure 2This is a top view of the limiting state of the present invention;

[0019] Figure 3 This is a front view of the process of releasing the invention.

[0020] Figure 4 This is a front view of the lowering process of the present invention;

[0021] Figure 5 This is a front view of the lowered state of the present invention.

[0022] Figure 6 This is a schematic diagram of the guide bridge of the present invention;

[0023] Figure 7 This is a schematic diagram of the anchor chain bolt support of the present invention.

[0024] 1 is the guide bridge, 2 is the limiting rigging, 3 is the anchor chain bolt support, 3-1 is the I-beam column, 3-2 is the lifting lug, 3-3 is the I-beam diagonal brace, 3-4 is the I-beam cross brace, 4 is the winch, 5 is the universal joint, 6 is the rigging and release rigging, 7 is the mooring anchor chain, 8 is the floating wind power platform, and 9 is the limiting safety pin. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-7 This invention provides a method for limiting and retrieving mooring anchor chains for floating wind power platforms, comprising the following steps:

[0027] S1. Before the floating wind power platform reaches the target sea area, install one end of the mooring anchor chain 7 on the universal joint 5 at the bottom of the column of the floating wind power platform 8, and suspend it vertically along the bottom and middle section of the column and extend it from bottom to top with tension.

[0028] S2. Place the other end of the mooring anchor chain 7 on the guide bridge 1 and bend it vertically downward. Connect one end of the limiting sling 2 to the bend of the mooring anchor chain 7 and fix it in place. Connect the other end of the limiting sling 2 to the upper and lower parts of the anchor chain bolt bracket 3.

[0029] S3. When the floating wind power platform reaches the target sea area, first release the limit of the mooring anchor chain 7, disconnect the limit rigging 2 from the upper part of the anchor chain tie bracket 3, and then dismantle the upper structure of the anchor chain tie bracket 3.

[0030] S4. Connect one end of the rigging 6 to the limiting rigging 2 and the other end to the wire rope of the winch 4. Start the winch 4 so that the winch 4 pulls the mooring anchor chain 7 with force. Disconnect the limiting rigging 2 from the lower part of the anchor chain bolt bracket 3.

[0031] S5. Start winch 4 and slowly lower the mooring anchor chain 7 until it is completely lowered underwater. After the underwater ROV has finished its underwater operation, winch 4 will retrieve the connecting rigging. If the height of the mooring anchor chain 7 needs to be adjusted during the lowering process or in case of an emergency, winch 4 can also be used for direct retrieval.

[0032] In one embodiment of the present invention, the guide bridge 1 has a grooved arc-shaped structure; a limit safety pin 9 is provided at one end of the guide bridge 1 near the winch 4.

[0033] In one embodiment of the invention, the width of the groove of the guide bridge 1 is matched with the width of the mooring anchor chain 7.

[0034] In one embodiment of the present invention, the limiting rigging 2 is a transverse "Y" shape.

[0035] In one embodiment of the present invention, the anchor chain bolt support 3 includes three I-beam columns 3-1, which are fixedly connected by steel plates; each I-beam column 3-1 has a lifting lug 3-2 on its upper and lower parts near the limiting rigging 2; and an I-beam diagonal brace 3-3 is fixedly connected to the side of the I-beam column 3-1 away from the lifting lug 3-2.

[0036] In one embodiment of the present invention, the lower part of the I-beam 3-1 is provided with an I-beam cross brace 3-4, and the I-beam cross brace 3-4 is fixedly connected to the I-beam diagonal brace 3-3; the number of the I-beam diagonal brace 3-3 is three and they are fixedly connected by steel plates.

[0037] In one embodiment of the present invention, the upper and lower parts of the anchor chain bolt bracket 3 can also be designed as bolted connections, and the upper structure can be dismantled by removing the bolts.

[0038] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for limiting and retracting mooring anchor chains for floating wind power platforms, characterized in that, Includes the following steps: S1. Before the floating wind power platform reaches the target sea area, install one end of the mooring anchor chain (7) on the universal joint (5) at the bottom of the column of the floating wind power platform (8), and suspend it vertically along the bottom and middle section of the column and extend it from bottom to top with tension. S2. Place the other end of the mooring anchor chain (7) on the guide bridge (1) and bend it vertically downward. Connect one end of the limiting sling (2) to the bend of the mooring anchor chain (7) and fix it in place. Connect the other end of the limiting sling (2) to the upper and lower parts of the anchor chain bolt bracket (3). S3. When the floating wind power platform reaches the target sea area, first release the limit of the mooring anchor chain (7), disconnect the limit rigging (2) from the upper part of the anchor chain tie bracket (3), and then dismantle the upper structure of the anchor chain tie bracket (3). S4. Connect one end of the rigging (6) to the limiting rigging (2) and the other end to the wire rope of the winch (4). Start the winch (4) so ​​that the winch (4) pulls the mooring anchor chain (7) with force. Disconnect the limiting rigging (2) from the lower part of the anchor chain tie bracket (3). S5. Start the winch (4) and slowly lower the mooring anchor chain (7) until the mooring anchor chain (7) is completely lowered underwater. After the underwater ROV operates underwater, the winch (4) retrieves the rigging (6). If the height of the mooring anchor chain (7) needs to be adjusted during the lowering process or in case of an emergency, the winch (4) will directly retrieve it. The guide bridge (1) has a grooved arc structure; a limit safety pin (9) is provided at one end of the guide bridge (1) near the winch (4); the groove width of the guide bridge (1) matches the width of the mooring anchor chain (7); the limiting rigging (2) is a transverse "Y" shape. The anchor chain tethering bracket (3) includes an I-beam column (3-1); there are three I-beam columns (3-1) and they are fixedly connected by steel plates; the upper and lower parts of the side of the I-beam column (3-1) closest to the limiting rigging (2) are provided with lifting lugs (3-2); the side of the I-beam column (3-1) away from the lifting lugs (3-2) is fixedly connected with an I-beam diagonal brace (3-3); the lower part of the I-beam column (3-1) is provided with an I-beam cross brace (3-4), and it is fixedly connected to the I-beam diagonal brace (3-3) through the I-beam cross brace (3-4); there are three I-beam diagonal braces (3-3) and they are fixedly connected by steel plates.

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