Anti-scour protection device for offshore wind turbine pile foundation

Abstract

The utility model relates to the technical field of offshore wind turbine pile foundation anti-scour equipment, in particular to an offshore wind turbine pile foundation anti-scour protection device which comprises a pile foundation sleeving part, a connecting deep-buried part and an annular hose which are sequentially arranged from inside to outside, and the pile foundation sleeving part, the connecting deep-buried part and the annular hose are coaxially designed. The pile foundation sleeving part is connected with the connecting deep burying part through a plurality of connecting pieces, the connecting deep burying part is of a hollow structure, and the connecting deep burying part communicates with the annular hose through a plurality of pipelines; according to the anti-scouring protection device for the offshore wind turbine pile foundation, water flow is prevented from passing through a wind turbine, the flow speed of the water flow around the pile foundation is greatly reduced, horseshoe vortexes and shrinkage of streamlines on the two sides are avoided, scouring is avoided, silt around the pile foundation is prevented from being washed away, a scouring pit is avoided, and the stability of the pile foundation is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind turbine pile foundation anti-scouring equipment, in particular to an offshore wind turbine pile foundation anti-scouring protection device. Background Art

[0002] When a wind turbine is installed in the ocean, the presence of the wind turbine changes the original water flow conditions. The fluid on the front side is hindered by the wind turbine, the flow rate is reduced, and a reverse pressure gradient is generated with high downstream pressure and low upstream pressure. When the reverse pressure gradient reaches a certain level, the original movement of the fluid will not only be stopped, but also move upstream (in the opposite direction) under the action of the reverse pressure gradient, thereby forming a vortex, namely a horseshoe vortex, which moves along the root area of ​​the obstacle in the corner area of ​​the ground near the root of the obstacle, continuously scouring the mud and sand on the front side of the pile, while streamlines shrink on both sides and tail vortices appear on the rear side, scouring the surrounding areas of the pile and causing pits, resulting in a decrease in the bearing capacity of the foundation and easy collapse.

[0003] Currently, there are few protective measures, mainly riprap protection or the installation of porous devices around wind turbines. However, riprap protection often collapses or is washed away during scouring, losing its protective effect. Moreover, the submarine cable extending from the wind turbine will rub against these rocks, causing damage and failure of the submarine cable. The porous device can theoretically disrupt the water flow and reduce the flow rate, but there will still be flowing water at the pile foundation, causing scouring. Patent document with application number CN202410191133.5 discloses an anti-scouring device for offshore wind power pile foundations. It discloses two bases buried in the seabed and fixed to each other, a connecting plate fixed to the inner wall of the base, a connecting rod fixed to one end of the connecting plate, and two fixing sleeves fixed to the top of the connecting rod. It needs to be spliced ​​together, which is complicated to operate. As the use time increases, there is a risk of the splicing being loose and falling off. There will still be flowing water at the pile foundation, causing scouring. Utility Model Content

[0004] In order to solve the above technical problems existing in the prior art, the utility model provides an anti-scour protection device for offshore wind turbine pile foundations.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes an offshore wind turbine pile foundation anti-scour protection device, comprising: a pile foundation sleeve part, a connection deep part and an annular hose arranged in sequence from the inside to the outside, the pile foundation sleeve part, the connection deep part and the annular hose are coaxially designed, the pile foundation sleeve part and the connection deep part are connected by multiple connecting parts, the connection deep part is a hollow structure, and the connection deep part is connected to the annular hose through multiple pipelines. The overall anti-scour protection device consists of three parts. The innermost pile foundation socket is sleeved on the pile foundation, and the buried deep part is connected to the pile foundation socket through a connector to maintain an appropriate distance from the pile foundation, ensuring that there is no scour in a sufficiently large area around the pile foundation, blocking the water flow through the wind turbine, and the water flow velocity around the pile foundation is greatly reduced. No horseshoe vortex or streamline contraction on both sides will occur, thereby avoiding scour. The mud and sand around the pile foundation will not be washed away to form scour pits, thereby protecting the stability of the pile foundation; the internal hollow can be used to inject quicksand and flow into the annular hose through a pipeline. The annular hose sinks due to increased gravity and fits the seabed. It can also deform and fit the seabed again after scouring to avoid being suspended in the air. The hose is located on the seabed and occupies part of the horseshoe vortex position, blocking the flow of water at the bottom, reducing the scouring intensity of the horseshoe vortex on the seabed, and also reducing the flow velocity in the boundary layer close to the seabed, reducing the shear force of the water on the seabed, and reducing scouring.

[0006] As an optional embodiment, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the bottom portion of the connection to the deeply buried portion is provided with a sharp portion. The purpose of the sharp bottom portion is to enable the protection device to sink more easily under its own gravity when placed on the seabed and be buried deeper in the mud and sand, making the device more stable under the restraint of mud and sand and less likely to be washed away by water.

[0007] As an optional embodiment, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, multiple holes are formed along the perimeter of the outer wall of the deep connection portion near the sharp portion, and these holes are used to connect to the pipeline. By providing multiple holes, when slurry is injected into the hollow portion within the deep connection portion, it can be quickly filled into the annular hose through the pipeline, causing the annular hose to sink due to increased gravity and conform to the seabed. After scour occurs, it can then deform and conform to the seabed again, preventing it from becoming suspended in the air.

[0008] As an optional embodiment, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the connecting member includes a first hook, a cable, and a second hook. A plurality of the first hooks are provided on the outer wall of the pile foundation sleeve portion, and a plurality of second hooks corresponding to the first hooks are provided on the inner wall of the deep connection portion. The first hook and the second hook are connected by the cable. By providing the first hook, the cable, and the second hook that cooperate with each other, the movement of the entire device can be restricted. In the face of severe ocean currents such as typhoons, the internal pile foundation sleeve portion will not move due to its sleeve on the pile foundation. As a result, even if the deep connection portion moves, the cable will not cause significant displacement, thereby ensuring the fixation of the device.

[0009] As an optional embodiment, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the first hook is located in the middle of the outer wall of the pile foundation sleeve portion, and the second hook is located in the middle of the inner wall of the deep connection portion. Maintaining the first and second hooks in relatively middle positions can increase the stability of the entire device.

[0010] As an optional implementation scheme, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the pile foundation sleeve portion and the deep connection portion are both cylindrical structures.

[0011] As an optional implementation scheme, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the height of the pile foundation sleeve part is less than the height of the connection buried deep part; preventing the pile foundation sleeve part from tipping over, and also avoiding the pile foundation sleeve part from being too heavy.

[0012] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the pile foundation sleeve part, the connection buried depth part and the annular hose are sequentially arranged from the inside to the outside, the pile foundation sleeve part, the connection buried depth part and the annular hose are coaxially designed, the pile foundation sleeve part and the connection buried depth part are connected by multiple connectors, the connection buried depth part is a hollow structure, the connection buried depth part is connected to the annular hose through multiple pipelines, the overall anti-scour protection device consists of three parts, the innermost pile foundation sleeve part is sleeved on the pile foundation, the connection buried depth part is connected to the pile foundation sleeve part through the connector, and can maintain an appropriate distance from the pile foundation, ensuring that there is no scour in a sufficiently large area around the pile foundation, blocking water flow through the wind turbine, and greatly reducing the water flow velocity around the pile foundation. No horseshoe vortex will be generated and the streamlines on both sides will not shrink, thus avoiding scouring. The mud and sand around the pile foundation will not be washed away to form scouring pits, thus protecting the stability of the pile foundation. The buried part of the connection can also rely on its own gravity to sink more easily into deeper mud and sand, making the device more stable under the restriction of mud and sand and difficult to be washed away by water flow. The internal hollow can be used to inject quicksand and flow into the annular hose through the pipe. The annular hose sinks due to gravity and fits the seabed. It can also deform and fit the seabed again after scouring to avoid being suspended. The hose is located on the seabed and occupies part of the horseshoe vortex, blocking the flow of water at the bottom, reducing the scouring intensity of the horseshoe vortex on the seabed, and can also reduce the flow velocity in the boundary layer close to the seabed, reducing the shear force of the water flow on the seabed, and reducing scouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0014] Figure 1 A structural diagram of the offshore wind turbine pile foundation anti-scour protection device provided by the utility model;

[0015] Figure 2 A top view of the offshore wind turbine pile foundation anti-scour protection device provided by the utility model;

[0016] Figure 3 A cross-sectional view of the offshore wind turbine pile foundation anti-scour protection device provided by the utility model;

[0017] Figure 4 This is a schematic diagram of the installation of the offshore wind turbine pile foundation anti-scour protection device provided by the utility model.

[0018] [Description of Reference Numerals]

[0019] 1. Pile foundation socket; 2. Deep connection part; 21. Sharp part; 3. Annular hose; 4. Connector; 41. First hook; 42. Pull rope; 43. Second hook; 5. Pipeline; 6. Pile foundation. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention, such as first, second, up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0023] The utility model provides an anti-scouring protection device for offshore wind turbine pile foundation, such as Figure 1-Figure 3As shown, it includes a pile foundation sleeve portion 1, a deep connection portion 2 and an annular hose 3 arranged in sequence from the inside to the outside. The pile foundation sleeve portion 1, the deep connection portion 2 and the annular hose 3 are coaxially designed. The pile foundation sleeve portion 1 and the deep connection portion 2 are connected by multiple connectors 4. The deep connection portion 2 is a hollow structure. The deep connection portion 2 is connected to the annular hose 3 through multiple pipelines 5. The overall anti-scour protection device consists of three parts. The innermost pile foundation socket part 1 is sleeved on the pile foundation 6. The connecting buried part 2 is connected to the pile foundation socket part 1 through a connector 4 and can maintain an appropriate distance from the pile foundation 6, ensuring that there is no scour in a sufficiently large area around the pile foundation 6, blocking the water flow through the wind turbine, and the water flow velocity around the pile foundation 6 is greatly reduced, and no horseshoe vortex or streamline contraction on both sides occurs, thereby avoiding scour. The mud and sand around the pile foundation 6 will not be washed away to form a scour pit, thereby protecting the stability of the pile foundation 6; the hollow inside the connecting buried part 2 can be used to inject quicksand and flow into the annular hose 3 through the pipeline 5. The annular hose 3 sinks due to increased gravity and fits the seabed. It can also deform and fit the seabed again after scouring to avoid being suspended in the air. The hose is located on the seabed and occupies part of the horseshoe vortex position, blocking the water flow at the bottom, so that the scouring intensity of the horseshoe vortex on the seabed is reduced, and it can also reduce the flow velocity in the boundary layer close to the seabed, reduce the shear force of the water flow on the seabed, and reduce scouring.

[0024] Further, such as Figure 3 As shown, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the bottom of the connecting buried portion 2 is provided with a sharp portion 21. The purpose of providing a sharp bottom is to enable the protection device to sink more easily under its own gravity when placed on the seabed and be buried deeper in the mud and sand, making the device more stable under the restraint of mud and sand and difficult to be washed away by water.

[0025] In the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, multiple holes are formed around the outer wall of the deep connection portion 2 near the sharp portion 21. These holes are used to connect to the pipeline 5. The provision of multiple holes allows slurry to be quickly injected into the hollow portion of the deep connection portion 2 through the pipeline 5 and into the annular hose 3, causing the annular hose 3 to sink due to gravity and adhere to the seabed. After scour, it can then deform and adhere to the seabed again, preventing it from becoming suspended in the air.

[0026] Furthermore, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the connecting member 4 includes a first hook 41, a cable 42, and a second hook 43. A plurality of the first hooks 41 are provided on the outer wall of the pile foundation socket portion 1, and a plurality of second hooks 43 corresponding to the first hooks 41 are provided on the inner wall of the deep connection portion 2. The first hooks 41 and the second hooks 43 are connected by the cable 42. By providing the first hooks 41, the cable 42, and the second hook 43 that are interconnected, the movement of the entire device can be restricted. In the face of severe ocean currents such as typhoons, the internal pile foundation socket portion 1 will not move due to being sleeved on the pile foundation 6. As a result, even if the deep connection portion 2 moves, it will not be significantly displaced due to the action of the cable 42, thereby ensuring the fixation of the device. The cable 42 is a steel cable.

[0027] In addition, the first hook 41 is provided at the middle position of the outer wall of the pile foundation sleeve portion 1, and the second hook 43 is provided at the middle position of the inner wall of the deep connection portion 2. The first hook 41 and the second hook 43 are kept at the relatively middle position, which can increase the stability of the entire device.

[0028] Furthermore, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the pile foundation sleeve portion 1 and the deep connection portion 2 are both cylindrical structures.

[0029] Furthermore, in the offshore wind turbine pile foundation anti-scour protection device provided by the present invention, the height of the pile foundation socket part 1 is less than the height of the connection buried deep part 2; thus, the pile foundation socket part 1 is prevented from tipping over and the weight of the pile foundation socket part 1 is avoided to be too heavy.

[0030] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An anti-scour protection device for offshore wind turbine pile foundation, characterized in that: The invention comprises a pile foundation sleeve portion (1), a deep-buried connection portion (2) and an annular hose (3) which are sequentially arranged from the inside to the outside. The pile foundation sleeve portion (1), the deep-buried connection portion (2) and the annular hose (3) are coaxially designed. The pile foundation sleeve portion (1) and the deep-buried connection portion (2) are connected via a plurality of connectors (4). The deep-buried connection portion (2) is a hollow structure. The deep-buried connection portion (2) is connected to the annular hose (3) via a plurality of pipelines (5).

2. The offshore wind turbine pile foundation anti-scour protection device according to claim 1, characterized in that: The bottom of the deep connection part (2) is provided with a sharp part (21).

3. The offshore wind turbine pile foundation anti-scour protection device according to claim 2, characterized in that: A plurality of holes are provided on the outer wall of the deep connection portion (2) near the sharp portion (21) along the periphery thereof, and the holes are used for connecting to the pipeline (5).

4. The offshore wind turbine pile foundation anti-scour protection device according to claim 1, characterized in that: The connecting member (4) comprises a first hook (41), a cable (42) and a second hook (43); a plurality of the first hooks (41) are provided on the outer wall of the pile foundation sleeve portion (1); a plurality of second hooks (43) corresponding to the first hooks (41) are provided on the inner wall of the deep connection portion (2); the first hook (41) and the second hook (43) are connected via the cable (42).

5. The offshore wind turbine pile foundation anti-scour protection device according to claim 4, characterized in that: The first hook (41) is provided at a middle position of the outer wall of the pile foundation sleeve portion (1), and the second hook (43) is provided at a middle position of the inner wall of the deep connection portion (2).

6. The offshore wind turbine pile foundation anti-scour protection device according to claim 1, characterized in that: The pile foundation sleeve portion (1) and the deep connection portion (2) both have cylindrical structures.

7. The offshore wind turbine pile foundation anti-scour protection device according to claim 1, characterized in that: The height of the pile foundation sleeve portion (1) is smaller than the height of the connection buried depth portion (2).

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