Fan scouring protection device

Abstract

The utility model provides a fan scouring protection device which comprises a cone tire device and a support arranged on a fan pile foundation in a sleeved mode, and the support is used for supporting the cone tire device. The cone tire device comprises a conical surface tire structure laid on the side face of the cone and a flat tire structure laid on the bottom face of the cone, and the conical surface tire structure and the flat tire structure are both connected with the support. Effective protection of fan scouring can be achieved, the sediment deposition function is achieved, and scouring protection failure caused by tidal current reversing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind turbine protection, in particular to a wind turbine scour protection device. Background Art

[0002] In terms of wind turbine foundation scour protection, current scour protection measures are roughly divided into two types: active protection and passive protection. Passive protection aims to improve the seabed's resistance to erosion, and is generally achieved by laying a protective layer, such as riprap protection, concrete interlocking rows, etc. to increase the bottom bed's shear resistance. Active protection aims to reduce the erosive ability of water flow, reduce the formation of downwelling water and horseshoe vortexes to suppress scour, such as pile body openings, sacrificial piles and other measures. However, the existing forms of protection such as riprap, sandbags, and bionic water plants have unstable protective effects and carry the risk of secondary scour. Although traditional riprap, grouting and other protective measures are simple to construct, the construction effect is poor. At the same time, regular inspections are required, and the subsequent operation and maintenance costs are high. It also has a certain impact on the surrounding ecological environment.

[0003] In recent years, waste tires have also been increasingly used for scour prevention. Currently, existing methods for using waste tires for wind turbine scour protection often involve laying them flat. However, this approach has limited effectiveness in reducing horseshoe vortices and results in insignificant sediment accumulation behind them, limiting their effectiveness in scour prevention. Another approach involves laying bionic aquatic plants on top of the flattened waste tires. However, the bionic aquatic plants currently used in projects with good protection are mostly imported, resulting in high costs and unsuitable for large-scale deployment.

[0004] Patent publication number CN114508130A discloses an offshore wind turbine scour prevention structure and its installation method. The structure includes a tire mounting bracket structure wrapped around a pile to mitigate submerged currents, a flat tire structure and a vertical tire structure buried at a certain depth to mitigate horseshoe-shaped vortices, and a tapered arc-shaped tire structure to mitigate wake vortices. However, the tapered arc-shaped tire structure only selectively suspends a portion of the tire, serving solely as a spoiler. It lacks scour protection, wastes materials, and increases costs. Utility Model Content

[0005] The purpose of the present invention is to solve the defects in the prior art and provide a new scour protection device. The present invention can effectively protect the fan from scour, realize the sediment deposition function, and avoid the scour protection failure caused by the reversal of the tide.

[0006] To achieve the above-mentioned purpose, the utility model provides a wind turbine scour protection device, comprising a cone tire device and a bracket sleeved on the wind turbine pile foundation, wherein the bracket is used to support the cone tire device;

[0007] The cone tire device comprises a cone tire structure laid on the side of the cone and a flat tire structure laid flat on the bottom of the cone. Both the cone tire structure and the flat tire structure are connected to the bracket.

[0008] This utility model's wind turbine scour protection device is entirely made of waste tires. The conical tire structure and the flat tire structure are fixed and connected using brackets, ensuring the stability of the cone angle of the cone tire device and preventing structural deformation and failure. The brackets are used to roughly fix the shape, and then the conical tire structure and the flat tire structure are laid on the brackets.

[0009] This utility model utilizes waste tires and employs a cone-shaped protection method for scour protection. The cone-shaped tire structure covers the entire side of the cone, preventing protection failure caused by tidal current reversal and providing effective scour protection. The cone-shaped tire structure, laid on all sides, deposits large amounts of sediment downstream, weakening upstream horseshoe vortices, reducing water flow, and actively silting. The porous structure of the entire device provides a habitat for aquatic life, thereby attracting microorganisms, plants, and small animals, achieving ecological restoration.

[0010] Optionally, the conical tire structure is provided with multiple layers from the inside to the outside, and the multiple layers of the conical tire structure are all connected to the bracket.

[0011] Compared with the scour protection method of single-layer cone tires, the scour protection method of multi-layer cone tire structure realizes the step-by-step energy dissipation of water flow and has better scour protection effect.

[0012] Optionally, the outermost layer of the conical tire structure is arranged on a bracket, and the conical tire structures between adjacent layers are connected.

[0013] The outermost conical tire structure is fixed by a bracket, and the inner conical tire structure does not use a frame. It is directly connected to the conical tire structure of the adjacent layer through the first connecting piece. The innermost conical tire structure is connected to the flat tire structure through the first connecting piece to realize the three-dimensional laying of the internal tire.

[0014] Optionally, the conical tire structures between adjacent layers are connected by a first connecting member.

[0015] Optionally, the tire sizes of the flat tire structure and the conical tire structure gradually decrease from the outside to the inside.

[0016] Optionally, the ratio of adjacent tire diameters from outside to inside of the conical tire structure and the flat tire structure is:

[0017]

[0018] Where D is the diameter of the wind turbine pile foundation, and d is the diameter of the outermost tire in the conical tire structure or flat tire structure.

[0019] Optionally, the angle between the conical tire structure and the horizontal plane is 30 degrees, which is close to the sediment repose angle, thereby achieving sediment re-deposition to the greatest extent.

[0020] Optionally, the conical tire structure and the flat tire structure are both connected to the bracket via a second connecting member.

[0021] Optionally, adjacent tires in the conical tire structure and adjacent tires in the flat tire structure are connected by a third connecting member. The third connecting member includes a rope and a hook. The tires are flexibly connected by the rope, and the hook secures the rope to the tires, thereby preventing stress concentration during construction from causing damage to the device.

[0022] Beneficial effects:

[0023] This utility model's wind turbine scour protection device is entirely made of waste tires. The conical tire structure and the flat tire structure are fixed and connected using brackets, ensuring the stability of the cone angle of the cone tire device and preventing structural deformation and failure. The brackets are used to roughly fix the shape, and then the conical tire structure and the flat tire structure are laid on the brackets.

[0024] This utility model utilizes waste tires and employs a cone-shaped protection method for scour protection. The cone-shaped tire structure covers the entire side of the cone, preventing protection failure caused by tidal current reversal and providing effective scour protection. The cone-shaped tire structure, laid on all sides, deposits large amounts of sediment downstream, weakening upstream horseshoe vortices, reducing water flow, and actively silting. The porous structure of the entire device provides a habitat for aquatic life, thereby attracting microorganisms, plants, and small animals, achieving ecological restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods 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.

[0026] Figure 1 This is a structural diagram of the fan scour protection device disclosed in the utility model;

[0027] Figure 2 This is a structural diagram of the bracket in the fan scour protection device disclosed in the utility model;

[0028] Figure 3 This is a structural diagram of the cone tire device in the fan scour protection device disclosed in the utility model;

[0029] Figure 4 This is a structural diagram of the flat tire structure in the wind turbine scour protection device disclosed in the utility model;

[0030] Figure 5 This is the scour topography for the indoor water tank test without protection;

[0031] Figure 6 A scour topography map during an indoor water tank test using the fan scour protection device disclosed in the utility model;

[0032] Figure 7 This is the scour topography for an indoor water flume test using flat tire protection.

[0033] Reference numerals: 1 wind turbine pile foundation; 2 bracket; 21 fixing ring; 22 frame; 3 conical tire structure; 31 first connecting member; 4 flat tire structure; 41 bionic water grass; 42 third connecting member.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] 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.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] See also Figure 1-4 According to an embodiment of the present invention, a wind turbine scour protection device includes a cone tire device and a bracket 2 mounted on a wind turbine pile foundation 1, wherein the bracket 2 is used to support the cone tire device;

[0039] The cone tire device includes a cone tire structure 3 laid on the side of the cone and a flat tire structure 4 laid flat on the bottom of the cone. The cone tire structure 3 and the flat tire structure 4 are both connected to the bracket 2.

[0040] Specifically, the wind turbine scour protection device is entirely made of waste tires. The conical tire structure 3 and the flat tire structure 4 are fixed and connected using a bracket 2 to ensure the stability of the cone angle of the cone tire device and prevent structural deformation and failure. The bracket 2 is used to roughly fix the shape, and then the conical tire structure 3 and the flat tire structure 4 are laid on the bracket 2.

[0041] This utility model utilizes waste tires and employs a cone-shaped protection method for scour protection. The cone-shaped tire structure 3 provides tire coverage on all sides of the cone, preventing protection failure caused by tidal current reversal and providing effective scour protection. The cone-shaped tire structure 3, laid on all sides, deposits large amounts of sediment downstream, weakening upstream horseshoe vortices, reducing water flow, and actively silting. The overall porous structure of the utility model provides a habitat for aquatic life, thereby attracting microorganisms, plants, and small animals, achieving ecological restoration.

[0042] The bracket 2 is made of high-density polyethylene (HDPE), a material with excellent chemical and impact resistance. The overall shape of the bracket 2 resembles an umbrella frame, comprising two fixing rings 21 and a plurality of frames 22 arranged circumferentially on the fixing rings 21. The two fixing rings 21 are respectively connected to the ends of the frames 22. The bracket 2 is divided into four parts, which are fastened with bolts between the fixing rings 21. The bracket 2 can be prefabricated onshore and then assembled directly on-site. Before construction, the tire structure is connected to the bracket 2 via a second connecting member, and the adjacent layers of the conical tire structure 3 are connected via a first connecting member 31. The bracket 2 and the conical tire structure 3 blocks are hoisted into the water. Underwater, divers assemble the brackets 2 between the different blocks and place them around the wind turbine pile foundation 1. The number of frames 22 can be flexibly adjusted based on the diameter of the wind turbine pile foundation 1 and the diameters of the tires in the conical tire structure 3 and the flat tire structure 4, so that the sides and bottom of the conical tire assembly are fully covered with tires.

[0043] The bracket 2 is prefabricated and assembled. The bracket 2 is divided into 4 parts. During construction, it is hoisted into the water and assembled with the assistance of divers underwater. The different bracket 2 blocks are connected with locks.

[0044] The utility model has low construction requirements and only requires hoisting and divers to assist in construction. At the same time, the construction effect is guaranteed. Even if the construction quality of the device is poor, the maximum scouring depth occurs at the edge of the structure, and the scouring pit is far away from the fan pile foundation 1, which ensures the safety and stability of the fan to the greatest extent.

[0045] See also Figure 3 In some embodiments of the present invention, the conical tire structure 3 is provided with multiple layers from the inside to the outside, and the multiple layers of the conical tire structure 3 are all connected to the bracket 2.

[0046] In the embodiment, the conical tire structure 3 has three layers from the inside to the outside. Compared with the scour protection method of the single-layer conical tire, the scour protection method of the multi-layer conical tire structure 3 realizes the step-by-step energy dissipation of the water flow and has a better scour protection effect.

[0047] See also Figure 3 In some embodiments of the present invention, the outermost conical tire structure 3 is disposed on the support 2 , and the conical tire structures 3 between adjacent layers are connected. The conical tire structures 3 between adjacent layers are connected by a first connecting member 31 .

[0048] In this embodiment, the outermost conical tire structure 3 is fixed by a bracket 2, while the inner conical tire structure 3 does not use a frame and is directly connected to the conical tire structure 3 of the adjacent layer via a first connecting member 31, thereby achieving a three-dimensional laying of the inner tires. The first connecting member 31 is an anchor chain or rope.

[0049] See also Figure 2 In some embodiments of the present invention, the tire sizes of the flat tire structure 4 and the conical tire structure 3 gradually decrease from the outside to the inside.

[0050] Referring to the figure, in some embodiments of the present invention, the ratio of adjacent tire diameters of the flat tire structure 4 and the conical tire structure 3 from outside to inside is:

[0051]

[0052] Wherein D is the diameter of the wind turbine pile foundation 1 , and d is the diameter of the outermost tire in the flat tire structure 4 or the conical tire structure 3 .

[0053] The tires are arranged in a circular pattern to ensure maximum tire density. The outermost tire diameter of the conical tire structure 3 is the same as the outermost tire diameter of the flat tire structure 4. In this embodiment, the overall protection range of the device is three times the diameter of the wind turbine pile 1. The distance between the outermost sides of the flat tire structure 4 or the conical tire structure 3 and the wind turbine pile 1 is one times the diameter of the wind turbine pile 1, achieving the optimal solution for scour prevention. The multi-layer tire has three layers. From the outside to the inside, the distances between each conical tire structure 3 and the wind turbine pile 1 are D, 2 / 3D, and 1 / 3D, respectively.

[0054] See also Figure 3 In some embodiments of the present invention, the angle between the conical tire structure 3 and the horizontal plane is 30 degrees, which is close to the sediment repose angle, and achieves sediment regurgitation to the greatest extent.

[0055] See also Figure 2 In some embodiments of the present invention, the conical tire structure 3 and the flat tire structure 4 are both connected to the bracket 2 through a second connecting member.

[0056] The second connecting member is a rope. The outermost tire of the flat tire structure 4 is embedded with a counterweight and bionic water plants 41, ensuring the counterweight and stability of the cone tire assembly. This also provides a first-level reduction in the incoming flow intensity, reducing scour at the outer edges of the cone tire assembly. Simultaneously, the innermost tire of the flat tire structure 4 is embedded with bionic water plants 41, further reducing the strength of the horseshoe vortex. The use of tires also maintains the stability of the bionic water plants 41. Combined with the three-dimensionally laid tires, the bionic water plants 41 achieve the dual functions of scour protection and ecological restoration, depositing large amounts of sediment downstream, thus achieving ecological restoration.

[0057] See also Figure 4 In some embodiments of the present invention, adjacent tires in the conical tire structure 3 and adjacent tires in the flat tire structure 4 are connected by a third connecting member 42.

[0058] The third connecting member 42 includes a rope and a hook. The tires are softly connected by the rope, and the rope is fixed to the tire by the hook, thereby avoiding stress concentration during construction that may cause damage to the device.

[0059] Specific implementation process of the device:

[0060] 1. Purchase of used tires: Purchase tires according to the tire size required for construction.

[0061] 2. Waste Tire Testing and Treatment: Purchased waste tires undergo indoor UV aging testing to determine their corrosion resistance. The tires are also inspected for their overall condition and cleaned to remove oil and other contaminants to ensure they meet the requirements of sea trials and construction.

[0062] 4. Determine the underwater current conditions in the construction area and carry out device design and structural counterweight design.

[0063] 3. Device fabrication: The wind turbine scour protection device is divided into four parts, which are fabricated onshore and spliced underwater at the construction site. The tire structure 4 is flattened and embedded with counterweights and bionic water plants 41 to achieve underwater stability of the overall structure.

[0064] 5. On-site construction and installation: Before construction, the seabed conditions should be clarified, the terrain changes and the construction location should be determined, and underwater divers should be used to explore the terrain changes and rock pile conditions around the foundation. After that, on-site installation and hoisting should be carried out, and divers should be equipped to assist in the installation.

[0065] In order to verify the anti-scour effect of the cone tire device, an indoor water tank physical model scour test was conducted. The indoor water tank test results are as follows:

[0066] Indoor water tank tests revealed that when the cone-tire structure was placed around a wind turbine pile foundation (1), with the cone-tire structure (3) at an angle of 30° to the horizontal and three layers of cone-tire structure (3), the maximum scour depth around the wind turbine pile foundation (1) was reduced by 70% compared to the unprotected condition. Scour depth was greater at the edges of the cone-tire device, but the scour location was further away from the pile foundation, minimizing the impact on the foundation. Furthermore, it was found that the device affected the formation and shedding of wake vortices, causing sediment to accumulate downstream behind the pile, resulting in a better overall protective effect.

[0067] See also Figure 5 , is the scouring topography of the indoor water tank test without protection, the maximum scouring depth is S0 / D=0.745. Figure 6 , is the scour topography during the indoor water tank test when the fan scour protection device of the utility model is used for protection. The maximum scour depth is S p / D=0.095, the scour reduction efficiency reaches 87%; see Figure 7 , is the scouring topography of the indoor water tank test using only flat tire protection, with the maximum scouring depth being S p / D=0.385, and the scour reduction efficiency is 52%.

[0068] The scour reduction efficiency formula is as follows:

[0069]

[0070] Among them, S0 is the equilibrium scour depth without protection, S p is the scour depth after protection, K p The scouring reduction efficiency of the device.

[0071] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fan scour protection device, characterized in that: It includes a cone tire device and a bracket sleeved on the wind turbine pile foundation, and the bracket is used to support the cone tire device; The cone tire device comprises a cone tire structure laid on the side of the cone and a flat tire structure laid flat on the bottom of the cone. Both the cone tire structure and the flat tire structure are connected to the bracket.

2. The fan scour protection device according to claim 1, characterized in that: The conical tire structure is provided with multiple layers from the inside to the outside, and the multiple layers of the conical tire structure are all connected to the bracket.

3. The wind turbine scour protection device according to claim 2, characterized in that: The outermost conical tire structure is arranged on a bracket, and the conical tire structures between adjacent layers are connected.

4. The fan scour protection device according to claim 3, characterized in that: The conical tire structures between adjacent layers are connected by a first connecting member.

5. The wind turbine scour protection device according to claim 1, characterized in that: The tire sizes of the flat tire structure and the tapered tire structure gradually decrease from the outside to the inside.

6. The wind turbine scour protection device according to claim 5, characterized in that: The ratio of adjacent tire diameters from outside to inside of the conical tire structure and the flat tire structure is: Where D is the diameter of the wind turbine pile foundation, and d is the diameter of the outermost tire in the conical tire structure or flat tire structure.

7. The wind turbine scour protection device according to any one of claims 1 to 6, characterized in that: The angle between the conical tire structure and the horizontal plane is 30 degrees.

8. The wind turbine scour protection device according to any one of claims 1 to 6, characterized in that: The conical tire structure and the flat tire structure are both connected to the bracket via a second connecting member.

9. The wind turbine scour protection device according to any one of claims 1 to 6, characterized in that: Adjacent tires in the conical tire structure and adjacent tires in the flat tire structure are connected via a third connecting member.

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