Anti-scouring device applied to offshore wind power single pile

Abstract

The anti-scour device comprises a protective cover and a spoiler, the protective cover is used for being arranged on a pile body of the wind power single pile in a sleeving mode and enabling the protective cover to be arranged on a gravel layer around the pile body in a covering mode, a flow guide face is arranged on the outer side of the protective cover, and the flow guide face gradually rises from the periphery of the protective cover to the middle of the protective cover. The spoilers are arranged on the outer side of the protective cover at intervals in the circumferential direction of the protective cover, one ends of the spoilers in the length direction face the middle of the protective cover, and the other ends of the spoilers in the length direction face the periphery of the protective cover. And under the action of the protective cover and the spoiler, the anti-scouring performance of the whole anti-scouring device applied to the offshore wind power single pile is improved, and the mounting stability of the wind power single pile is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power equipment, and particularly relates to an anti-erosion device applied to an offshore wind power monopile. Background Art

[0002] Offshore wind power equipment is a new type of power generation equipment that utilizes offshore wind power resources and has developed rapidly in various countries around the world. Referring to Figure 1 as shown, the offshore wind power equipment mainly includes a wind power monopile 300, a generator set, blades, etc. Among them, the wind power monopile 300 is used to support and install the generator set and blades. The bottom end of the wind power monopile 300 extends below the sea surface 200 and is fixed on the seabed. In order to reduce the erosion of seawater on the installation foundation area of the wind power monopile 300, a gravel layer is usually laid around the installation foundation of the wind power monopile 300. During the long-term operation of the offshore wind power equipment, due to the action of ocean currents, waves and tides, local eddies are likely to form around the wind power monopile 300 (the arrow direction in the figure is the eddy movement direction), resulting in the gradual erosion and hollowing out of the seabed and the gravel layer laid on the seabed, and then forming an erosion pit 100. The damage of the seabed and the gravel layer will cause the installation foundation of the wind power monopile 300 to be impacted by ocean currents, which is likely to lead to a decrease in the installation stability of the wind power monopile 300 and threaten the operation safety of the entire offshore wind power equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide an anti-erosion device applied to an offshore wind power monopile, which has strong anti-erosion performance and high installation stability of the wind power monopile.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] An anti-erosion device applied to an offshore wind power monopile is provided, including a protective cover and a flow blocking plate. The protective cover is used to cover the pile body of the wind power monopile and enable the protective cover to cover the gravel layer around the pile body. The outer side of the protective cover has a guiding surface, and the guiding surface gradually rises from the periphery to the middle of the protective cover. The flow blocking plates are multiple, and the multiple flow blocking plates are arranged at intervals along the circumferential direction of the protective cover on the outer side of the protective cover. One end of the flow blocking plate along its own length direction faces the middle of the protective cover, and the other end faces the periphery of the protective cover.

[0006] Further, the protective cover includes a conical cover body, an installation cylinder and an edge pressing plate. The installation cylinder is located in the middle of the protective cover, the edge pressing plate is located at the periphery of the protective cover, the conical cover body is arranged between the installation cylinder and the edge pressing plate. The installation cylinder is used to sleeved on the pile body, the outer side of the conical cover body forms the guiding surface, and the edge pressing plate is used to horizontally abut against the gravel layer.

[0007] Further, an inner cavity for accommodating the gravel layer is provided inside the conical cover.

[0008] Further, a plurality of first through holes penetrating through both side surfaces in the thickness direction of the baffle are provided on the baffle.

[0009] Further, the plurality of first through holes are divided into multiple groups and arranged along a first direction, and the first through holes in adjacent two groups are staggered.

[0010] Further, a plurality of flow blocking nails are further provided on the baffle.

[0011] Further, the thickness dimension of the baffle gradually decreases from the end close to the protective cover to the end away from the protective cover.

[0012] Further, a cavity is formed inside the baffle, a plurality of second through holes for communicating the cavity with the outside are provided on the baffle, a third through hole is provided on the protective cover, and the cavity and the inner side of the protective cover are communicated through the third through hole.

[0013] Further, along the circumferential direction of the protective cover, the ends of two adjacent baffles away from the protective cover are arranged at an included angle.

[0014] Further, a counterweight is further included, and the counterweight is installed on the periphery of the protective cover.

[0015] Advantages of the present invention compared with the prior art:

[0016] An anti-scouring device applied to an offshore wind power monopile of the present invention, by sleeving a protective cover on the pile body, enables the protective cover to cover the gravel layer around the pile body, plays a role in protecting the gravel layer, and avoids the gravel layer around the pile body from being directly scoured by the ocean current. By setting the protective cover to be conical, a diversion surface with a high middle and a low periphery is formed on the protective cover, so that the ocean current moves in a direction away from the gravel layer. At the same time, when the ocean current flows through the protective cover, a downward pressure can be generated to promote the protective cover to tightly abut against the gravel layer and avoid the gravel layer in the peripheral area of the protective cover from being hollowed out by the ocean current. Therefore, the protective cover can play a role in guiding the movement direction of the ocean current and pressing the protective cover tightly against the gravel layer. Moreover, by providing a plurality of baffles on the protective cover, the ocean current is divided by the baffles, thereby reducing the overall impact force of the ocean current and avoiding serious scouring of the gravel layer around the protective cover. Under the action of the protective cover and the baffles, the anti-scouring performance of the entire anti-scouring device applied to the offshore wind power monopile is improved, and the installation stability of the wind power monopile is ensured. Description of the Drawings

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the installation of a wind power monopile in the prior art.

[0019] Figure 2 It is a schematic diagram of an anti-erosion device applied to an offshore wind power monopile according to an embodiment of the present invention.

[0020] Figure 3 It is a side view of an anti-erosion device applied to an offshore wind power monopile according to an embodiment of the present invention.

[0021] Figure 4 It is a cross-sectional view of an anti-erosion device applied to an offshore wind power monopile according to an embodiment of the present invention.

[0022] Figure 5 It is a cross-sectional view of a flow blocking plate according to another embodiment of the present invention.

[0023] Figure 1 In:

[0024] 100, scour pit; 200, sea surface; 300, wind power monopile;

[0025] Figures 2 to 5 In:

[0026] 1, protective cover; 11, conical cover body; 111, third through hole; 112, guide surface; 113, inner cavity; 12, installation cylinder; 13, edge pressing plate; 2, flow blocking plate; 20, cavity; 21, first through hole; 22, second through hole; 23, first flow blocking plate; 24, second flow blocking plate; 3, pile body; 4, sand and gravel layer. Specific Embodiments

[0027] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention clearer, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0028] Such as Figures 2 to 4As shown in the figure, an anti-erosion device for an offshore wind power monopile provided by the present invention (hereinafter simply referred to as the anti-erosion device) is used to protect the installation foundation of the wind power monopile from erosion. The wind power monopile is used to support the installation of equipment such as a generator set and blades. The wind power monopile includes a pile body 3 and an installation foundation, etc. The bottom end of the pile body 3 extends below the sea surface and is fixed to the seabed through the installation foundation. To avoid the installation foundation being scoured by the ocean current, a gravel layer 4 is laid around the bottom of the pile body 3. The anti-erosion device includes a protective cover 1 and a flow-blocking plate 2. Among them, the protective cover 1 is generally conical in shape. The protective cover 1 is used to sleeved on the pile body 3 of the wind power monopile, and the protective cover 1 can cover the gravel layer 4 around the pile body 3, playing a role in protecting the gravel layer 4 from erosion. The protective cover 1 has opposite inner and outer sides. The inner side of the protective cover 1 faces the gravel layer 4, and the outer side faces away from the gravel layer 4 (i.e., towards the sea surface). The outer side of the protective cover 1 has a guiding surface 112, and the guiding surface 112 gradually rises along the direction from the circumference to the middle of the protective cover 1. It can also be understood that the entire guiding surface 112 is conical in shape, and the middle of the guiding surface 112 is closer to the sea surface than the circumference. The flow-blocking plate 2 plays a role in dividing the ocean current and reducing the impact force of the ocean current. There are multiple flow-blocking plates 2, and the multiple flow-blocking plates 2 are arranged at intervals along the circumferential direction of the protective cover 1 on the outer side of the protective cover 1. One end of the flow-blocking plate 2 in the length direction faces the middle of the protective cover 1, and the other end faces the circumference of the protective cover 1. It can also be understood that the horizontal cross-section of the protective cover 1 is circular, and the length of the flow-blocking plate 2 extends along the radial direction of the horizontal cross-section of the protective cover 1.

[0029] In this embodiment, by sleeving a protective cover 1 on the pile body 3, the protective cover 1 can cover the gravel layer 4 around the pile body 3, playing a role in protecting the gravel layer 4 and preventing the gravel layer 4 around the pile body 3 from being directly scoured by the ocean current. By setting the protective cover 1 to be conical, a guiding surface 112 with a high middle and a low circumference is formed on the protective cover 1. When the ocean current impacts the protective cover 1, most of the ocean current will move upward under the guiding action of the guiding surface 112, so that the ocean current moves away from the gravel layer 4. At the same time, the component of the force of the ocean current acting on the guiding surface 112 will generate a downward pressure on the protective cover 1, promoting the protective cover 1 to tightly abut against the gravel layer 4 and preventing the gravel layer 4 in the circumferential area of the protective cover 1 from being hollowed out by the ocean current. Therefore, the protective cover 1 can play a role in guiding the movement direction of the ocean current and pressing the protective cover 1 tightly against the gravel layer 4. In addition, by arranging multiple flow-blocking plates 2 on the protective cover 1, the ocean current is divided by the flow-blocking plates 2 to divide the ocean current into multiple small ocean currents with different directions, thereby reducing the overall impact force of the ocean current and preventing the ocean current from causing serious erosion to the gravel layer 4 around the protective cover 1.

[0030] Specifically, the protective cover 1 includes a conical cover body 11, an installation cylinder 12, and an edge pressing plate 13. Among them, the conical cover body 11 is the main part of the protective cover 1. The conical cover body 11 is conical, and a flow guiding surface 112 is formed on the outer side of the conical cover body 11. The installation cylinder 12 is of a cylindrical structure. The installation cylinder 12 is sleeved on the pile body 3 to play a role in installing and fixing the protective cover 1. The edge pressing plate 13 is annular, and the edge pressing plate 13 is used to horizontally abut against the gravel layer 4. The installation cylinder 12 is located in the middle of the protective cover 1, the edge pressing plate 13 is located on the periphery of the protective cover 1, and the conical cover body 11 is arranged between the installation cylinder 12 and the edge pressing plate 13, that is, one end of the conical cover body 11 is connected to the bottom end of the installation cylinder 12, and the other end of the conical cover body 11 is connected to the inner ring side of the edge pressing plate 13. In this embodiment, the conical cover body 11 is used to guide the ocean current so that most of the ocean current moves upward, away from the gravel layer 4. The edge pressing plate 13 is used to compact the gravel layer 4 in the area around the protective cover 1 to avoid a chain reaction caused by the formation of a scouring pit in the gravel layer 4 in this area and the outflow of the gravel layer 4 under the protective cover 1.

[0031] Specifically, the conical cover body 11 is a hollow structure, and an inner cavity 113 is provided inside the conical cover body 11. The inner cavity 113 is used to accommodate the gravel layer 4. It can be understood that by filling the gravel layer 4 in the inner cavity 113 of the conical cover body 11, it is beneficial to increase the coverage of the gravel layer 4 around the pile body 3 and ensure the installation stability of the wind power monopile.

[0032] Specifically, referring to Figure 2 As shown, a plurality of first through holes 21 are provided on the flow blocking plate 2. The first through holes 21 penetrate through the two side surfaces in the thickness direction of the flow blocking plate 2. The first through holes 21 are for seawater to flow through. When the ocean current impacts this anti-scouring device, the seawater can flow through the first through holes 21 to generate turbulent flow, thereby reducing the overall impact kinetic energy of the ocean current. The arrangement of the plurality of first through holes 21 should be as irregular as possible to promote the generation of turbulent flow and reduce the overall impact kinetic energy of the ocean current. In this embodiment, the plurality of first through holes 21 are divided into multiple groups and arranged along the first direction (the width direction of the flow blocking plate 2, which can also be understood as the vertical direction). Each group has a plurality of first through holes 21. The first through holes 21 in adjacent two groups are staggered.

[0033] Specifically, a plurality of flow blocking nails (not shown in the figure) are also provided on the flow blocking plate 2. The flow blocking nails are of a rod-shaped structure, and one end of the flow blocking nail is fixedly connected to the flow blocking plate 2. The function of the flow blocking nail is similar to that of the first through hole 21, which is to generate turbulent flow to reduce the overall impact kinetic energy of the ocean current.

[0034] Specifically, referring to Figure 3As shown, a plurality of flow deflectors 2 are spaced apart along the circumferential direction of the protective cover 1. The flow deflectors 2 have two shapes. One type of flow deflector 2 is the first flow deflector 23, and the other type of flow deflector 2 is the second flow deflector 24. The first flow deflectors 23 and the second flow deflectors 24 are arranged alternately. Among two adjacent flow deflectors 2, one is the first flow deflector 23 and the other is the second flow deflector 24. One end of the first flow deflector 23 facing away from the protective cover 1 extends horizontally, and one end of the second flow deflector 24 facing away from the protective cover 1 is inclined relative to the horizontal direction, such that the ends of two adjacent flow deflectors 2 facing away from the protective cover 1 form an included angle. It can also be understood that the ends of two adjacent flow deflectors 2 facing away from the protective cover 1 are not in the same plane. The purpose of this arrangement is to make the arrangement of the plurality of flow deflectors 2 relatively disordered, thereby facilitating the generation of turbulent flow and reducing the overall impact kinetic energy of the ocean current.

[0035] Specifically, the anti-erosion device further includes a counterweight (not shown in the figure). The counterweight can be a sandbag, a stone, a precast cement pier, etc. The counterweight is installed on the circumference of the protective cover 1. In this embodiment, the counterweight is installed on the edge pressing plate 13. The protective cover 1 is pressed by the counterweight, so that the protective cover 1 can be stably pressed on the gravel layer 4.

[0036] In another embodiment, referring to Figure 5 As shown, the thickness dimension of the flow deflector 2 is B. The thickness dimension of the flow deflector 2 gradually decreases from the end close to the protective cover 1 to the end facing away from the protective cover 1. It can also be understood that the bottom end of the flow deflector 2 is connected to the protective cover 1, and the top end extends upward. The thickness of the flow deflector 2 has a structure with a smaller upper part and a larger lower part, that is, the cross-section of the flow deflector 2 is trapezoidal. This structure can generate a certain downward pressure when the ocean current flows through the surface of the flow deflector 2, so as to promote the protective cover 1 to press tightly on the gravel layer 4 below.

[0037] The baffle 2 has a hollow structure, and a cavity 20 is formed inside the baffle 2. A plurality of second through holes 22 are provided on both sides of the baffle 2 in the thickness direction, and the cavity 20 communicates with the outside of the baffle 2 through the second through holes 22. Seawater can flow on both sides of the baffle 2 in the thickness direction through the second through holes 22. A third through hole 111 is provided on the protective cover 1. Since the conical cover 11 is the main part of the protective cover 1, the third through hole 111 is provided on the conical cover 11. The third through hole 111 is arranged corresponding to the baffle 2, and the cavity 20 communicates with the inner side of the conical cover 11 through the third through hole 111, that is, the cavity 20 communicates with the inner cavity 113 through the third through hole 111. It can be understood that seawater will enter the cavity 20 through the second through holes 22, and most of the sediment carried in the seawater will settle in the cavity 20. This part of the sediment can enter the inner cavity 113 of the conical cover 11 through the third through hole 111 to supplement the gravel layer 4 below the protective cover 1. In practical applications, the gravel layer 4 in the peripheral area of the protective cover 1 will be gradually washed to form a scouring pit. Under the pressure of the protective cover 1, the gravel layer 4 on its inner side will slowly move towards the periphery to fill the scouring pit and prevent the gravel layer 4 around the protective cover 1 from being further hollowed out.

[0038] The remarkable effects of this embodiment are as follows: By sleeving a protective cover 1 on the pile body 3, the protective cover 1 can cover the gravel layer 4 around the pile body 3, playing a role in protecting the gravel layer 4 and preventing the gravel layer 4 around the pile body 3 from being directly scoured by the ocean current. By setting the protective cover 1 to be conical, a diversion surface 112 with a high middle and a low periphery is formed on the protective cover 1. When the ocean current impacts the protective cover 1, most of the ocean current will move upward under the diversion of the diversion surface 112, so that the ocean current moves away from the gravel layer 4. At the same time, the acting force component of the ocean current on the diversion surface 112 will generate a downward pressure on the protective cover 1 to promote the protective cover 1 to tightly abut against the gravel layer 4 and prevent the gravel layer 4 in the peripheral area of the protective cover 1 from being hollowed out by the ocean current. Therefore, the protective cover 1 can play a role in guiding the movement direction of the ocean current and pressing the protective cover 1 tightly against the gravel layer 4. In addition, by providing a plurality of baffle plates 2 on the protective cover 1, the ocean current is segmented by the baffle plates 2 to divide the ocean current into multiple small ocean currents with different directions, thereby reducing the overall impact force of the ocean current and preventing the ocean current from causing serious scouring of the gravel layer 4 around the protective cover 1.

[0039] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. An anti-scouring device for offshore wind power monopile, characterized in that: It includes a protective cover and a spoiler, wherein the protective cover is used to be sleeved on the pile body of a wind power single pile, and the protective cover can be covered on the gravel layer around the pile body, the outer side of the protective cover is provided with a guide surface, and the guide surface gradually rises from the periphery to the middle of the protective cover, and there are multiple spoilers, and the multiple spoilers are arranged on the outer side of the protective cover at intervals along the circumferential direction of the protective cover, and one end of the spoiler along its own length direction faces the middle of the protective cover, and the other end faces the periphery of the protective cover.

2. The anti-scouring device for offshore wind power monopile according to claim 1 is characterized in that: The protective cover includes a conical cover body, a mounting cylinder and an edge pressure plate, wherein the mounting cylinder is located in the middle of the protective cover, the edge pressure plate is located at the periphery of the protective cover, the conical cover body is arranged between the mounting cylinder and the edge pressure plate, the mounting cylinder is used to be sleeved on the pile body, the outer side of the conical cover body forms the guide surface, and the edge pressure plate is used to horizontally rest against the sand and gravel layer.

3. The anti-scouring device for offshore wind power monopile according to claim 2 is characterized in that: The inner side of the conical cover is provided with an inner cavity for accommodating the sand and gravel layer.

4. The anti-scouring device for offshore wind power monopile according to claim 1 is characterized in that: The spoiler is provided with a plurality of first through holes penetrating through two side surfaces of the spoiler in the thickness direction.

5. The anti-scouring device for offshore wind power monopile according to claim 4 is characterized in that: A plurality of the first through holes are arranged in a plurality of groups along a first direction, and the first through holes in two adjacent groups are staggered.

6. The anti-scouring device for offshore wind power monopile according to claim 4 is characterized in that: The spoiler is also provided with a plurality of spoiler pins.

7. The anti-scouring device for offshore wind power monopile according to claim 1, characterized in that: The thickness of the spoiler gradually decreases from an end close to the protective cover to an end away from the protective cover.

8. The anti-scouring device for offshore wind power monopile according to claim 7, characterized in that: A cavity is formed inside the spoiler, and a plurality of second through holes for connecting the cavity with the outside are arranged on the spoiler. A third through hole is arranged on the protective cover, and the cavity and the inner side of the protective cover are connected through the third through hole.

9. The anti-scouring device for offshore wind power monopile according to claim 1, characterized in that: Along the circumferential direction of the protective cover, two adjacent spoilers are arranged at an angle with one end away from the protective cover.

10. The anti-scouring device for offshore wind power monopile according to claim 1, characterized in that: It also includes a counterweight, which is installed on the periphery of the protective cover.

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