CN216156659U

CN216156659U - Offshore wind power anti-scouring device

Info

Publication number: CN216156659U
Application number: CN202122253740.4U
Authority: CN
Inventors: 邱旭; 马文冠; 闫姝; 刁新忠; 马强; 曾煜君; 王乾远
Original assignee: Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Huaneng International Power Jiangsu Energy Development Co Ltd; Shengdong Rudong Offshore Wind Power Co Ltd
Current assignee: Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Huaneng International Power Jiangsu Energy Development Co Ltd; Shengdong Rudong Offshore Wind Power Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-04-01
Anticipated expiration: 2031-09-16

Abstract

The utility model provides an offshore wind power anti-scouring device which comprises a pile foundation, a sleeve and an energy dissipation piece, wherein the pile foundation comprises a first part and a second part which are mutually connected in the axial direction of the pile foundation, the second part is buried in a seabed, the seabed is provided with a seabed surface, and the first part is positioned above the seabed surface; the sleeve is sleeved on the first part, the bottom of the sleeve is supported on the seabed surface, an energy dissipation piece capable of dissipating energy outwards is arranged on the outer peripheral surface of the sleeve, and/or a through hole is formed in the peripheral wall of the sleeve. The offshore wind power anti-scouring device provided by the embodiment of the utility model has the advantages of good turbulent flow effect, higher stability and the like.

Description

Offshore wind power anti-scouring device

Technical Field

The utility model relates to the field of offshore wind power, in particular to an offshore wind power anti-scouring device.

Background

Wind energy is increasingly regarded by human beings as a clean and harmless renewable energy source. Compared with land wind energy, offshore wind energy resources not only have higher wind speed, but also are far away from a coastline, are not influenced by a noise limit value, and allow the unit to be manufactured in a larger scale.

The offshore wind power foundation is the key point for supporting the whole offshore wind power machine, the cost accounts for 20-25% of the investment of the whole offshore wind power, and most accidents of offshore wind power generators are caused by unstable pile foundation. Due to the action of waves and tide, silt around the offshore wind power pile foundation can be flushed and form a flushing pit, and the flushing pit can influence the stability of the pile foundation. In addition, the water flow mixed with silt near the surface of the seabed continuously washes the pile foundation, corrodes and destroys the surface of the pile foundation, and can cause the collapse of the offshore wind turbine unit in serious cases. The anti-scouring device of the currently adopted offshore wind power pile foundation is mainly a riprap protection method. But the integrity of the riprap protection is poor, and the maintenance cost and the workload in the application process are large

SUMMERY OF THE UTILITY MODEL

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

due to the action of sea waves and tides, a phenomenon of scouring pits occurs around the foundation of the offshore wind power pile. The scouring phenomenon is a complex coupling process involving the interaction of water flow, sediment and structures. The main reason of causing the scouring is horseshoe-shaped vortex generated around the pile foundation, the horseshoe-shaped vortex is generated due to the obstruction of the pile foundation when seawater flows, when the sea water flows towards the pile foundation, the wave current presents a downward rolling and excavating vortex structure, the vortex structure lifts up the sediment on the seabed, and further brings the sediment away from the place around the pile foundation, a scouring pit is formed, the depth of the pile foundation is shallow due to the formation of the scouring pit, the vibration frequency of a cylinder is reduced, the pile foundation is over-fatigue is caused slightly, and the fracture accident is caused seriously.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the utility model provides an offshore wind power anti-scouring device.

According to the embodiment of the utility model, the offshore wind power anti-scouring device comprises:

a pile foundation including a first portion and a second portion, the second portion buried in a seabed, the seabed having a seabed surface, the first portion located above the seabed surface;

the sleeve is sleeved on the first part, the bottom of the sleeve is supported on the seabed surface, an energy dissipation piece capable of dissipating energy outwards is arranged on the outer peripheral surface of the sleeve, and/or a through hole is formed in the peripheral wall of the sleeve.

The offshore wind power anti-scouring device provided by the embodiment of the utility model has the advantages of good turbulent flow effect, higher stability and the like.

In some embodiments, the dissipater is plural, and plural dissipaters are arranged in the axial direction of the sleeve, and/or plural dissipaters are arranged in the circumferential direction around the sleeve.

In some embodiments, the dissipaters dissipate energy in a first direction relative to the outer periphery of the sleeve, the dissipaters having a dimension in the first direction that is the height of the dissipaters, the dissipaters arranged in the axial direction of the sleeve comprise a plurality of different heights, and/or the dissipaters arranged in the circumferential direction of the sleeve comprise a plurality of different heights.

In some embodiments, the dissipaters comprise one or more of dissipater nails, dissipater strips, dissipater mesh, the sleeve having an outer diameter De,

the energy dissipation nails are arranged on the outer peripheral surface of the sleeve at intervals, the ratio of the axial dimension of the sleeve to the circumferential dimension of the sleeve is greater than or equal to 1/2 and less than or equal to 2, the extension direction of the energy dissipation strips is parallel to the outer peripheral surface of the sleeve, the extension length of the energy dissipation strips is greater than or equal to 0.1De, and the energy dissipation net is a net-shaped structure covering at least one part of the outer peripheral surface of the sleeve.

In some embodiments, the energy dissipaters comprise a plurality of energy dissipater nails, energy dissipater strips, energy dissipater meshes, and the plurality of types of energy dissipaters are alternately distributed on the outer circumferential surface of the sleeve.

In some embodiments, the dissipaters and the through holes are alternately distributed over the circumferential wall of the sleeve.

In some embodiments, the dissipaters comprise a plurality of dissipaters, two dissipaters adjacent in the axial direction of the sleeve being staggered, and/or two dissipaters adjacent in the circumferential direction around the sleeve being staggered,

and/or the through holes comprise a plurality of through holes which are staggered in the axial direction of the sleeve, and/or two through holes which are adjacent in the circumferential direction around the sleeve.

In some embodiments, the density of the dissipaters and/or the through holes increases towards the proximity of the surface of the seabed.

In some embodiments, the outer circumferential surface of the sleeve comprises a front face facing in the direction of the flow of the fluid, a back face opposite the front face, and two side faces, the density of the dissipaters and/or the through holes distributed over the front face and the back face each being greater than the density of the dissipaters and/or the through holes distributed over the two side faces.

In some embodiments, the pile base is one, the sleeve is one,

or, the pile foundation is a plurality of, and is a plurality of the pile foundation interval arrangement, the sleeve includes a plurality of, and is a plurality of the sleeve with the pile foundation one-to-one.

In some embodiments, the central axis of the sleeve coincides with the central axis of the first portion, the first portion has an outer diameter D, and the distance between the inner circumferential surface of the sleeve and the outer circumferential surface of the first portion is 0.05D or more and 1D or less.

In some embodiments, the distance from the top end of the sleeve to the sea bed surface in the axial direction of the pile foundation is greater than or equal to 0.3 De.

In some embodiments, the bottom of the sleeve is provided with an anti-sinking plate extending along the sea bed surface, and the bottom surface of the anti-sinking plate is abutted against the sea bed surface.

In some embodiments, the bottom of the sleeve is provided with a soil cutting plate extending into the seabed along the axial direction of the pile foundation, and the bottom end of the soil cutting plate is of a knife-edge structure.

In some embodiments, the outer circumferential surface of the sleeve is a curved surface that is concave in a direction toward the first portion, and the outer diameter of the sleeve increases in a direction toward the seabed surface.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of an offshore wind power anti-scour arrangement according to an embodiment of the first aspect of the present invention.

Fig. 2 is a schematic view of an offshore wind power anti-scour arrangement according to an embodiment of the second aspect of the present invention.

Fig. 3 is a schematic view of an offshore wind power anti-scour arrangement according to an embodiment of a third aspect of the present invention.

Fig. 4 is a schematic view of an offshore wind power anti-scour arrangement according to a fourth aspect of the present invention.

Fig. 5 is a schematic view of an offshore wind power anti-scour arrangement according to an embodiment of the fifth aspect of the present invention.

Fig. 6 is a schematic view of an offshore wind power anti-scour arrangement according to an embodiment of the sixth aspect of the present invention.

Fig. 7 is a schematic view of an offshore wind power anti-scour arrangement according to a seventh embodiment of the present invention.

Fig. 8 is a schematic view of an offshore wind power anti-scour arrangement according to an eighth aspect of the present invention.

Fig. 9 is a schematic view of an offshore wind power anti-scour arrangement according to a ninth aspect of the present invention.

Fig. 10 is a schematic view of an offshore wind power anti-scour arrangement according to a tenth aspect of the present invention.

Fig. 11 is a schematic view of an offshore wind power anti-scour arrangement according to an eleventh aspect of the present invention.

Fig. 12 is a schematic view of an offshore wind power anti-scour arrangement, according to an embodiment of the twelfth aspect of the present invention.

Figure 13 is a schematic view of a sleeve of an offshore wind power scour protection according to an embodiment of the thirteenth aspect of the utility model.

Figure 14 is a schematic view of a sleeve of an offshore wind power scour protection according to an embodiment of the fourteenth aspect of the utility model.

Figure 15 is a schematic view of a sleeve of an offshore wind erosion protection device according to an embodiment of the fifteenth aspect of the utility model.

Reference numerals: an offshore wind power anti-scour apparatus 100; pile foundations 1; a first portion 11; a second portion 12; an energy dissipation member 2; a sleeve 3; an anti-settling plate 31; a cutting plate 32.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

An offshore wind turbine erosion protection device 100 according to an embodiment of the utility model is described below with reference to fig. 1-15, the offshore wind turbine erosion protection device 100 comprising a pile foundation 1 and a sleeve 3.

The pile foundation 1 comprises a first portion 11 and a second portion 12 connected to each other in the axial direction thereof, the second portion 12 being buried in a seabed having a seabed surface above which the first portion 11 is located;

the sleeve 3 is sleeved on the first part 11, the bottom of the sleeve is supported on the surface of the sea bed, the outer circumferential surface of the sleeve 3 is provided with an energy dissipation part 2 dissipating energy outwards, and/or the circumferential wall of the sleeve 3 is provided with a through hole.

In order to make the technical solution of the present application easier to understand, the technical solution of the present application will be further described below by taking as an example that the length direction of the pile foundation 1 coincides with the up-down direction, wherein the up-down direction is shown in fig. 1.

As can be seen by those skilled in the art, the conventional pile foundations 1 are hollow cylindrical structures, and the sea bed surface is the interface between seawater and underwater sand. A first part 11 and a second part 12 connected to each other are provided in order in the up-down direction of the pile foundation 1. The first part 11 of the pile foundation 1 is located in the sea water above the surface of the sea bed and the second part 12 of the pile foundation 1 is buried in the sand below the surface of the sea bed.

The sleeve 3 is fixed on the peripheral surface of the first part 11, the bottom of the sleeve 3 is contacted with the surface of the sea bed, and the sleeve 3 supports the gravity of the sleeve by the surface of the sea bed. The outer circumferential surface of the sleeve 3 is provided with a dissipation member 2 capable of dissipating tidal current energy, and the dissipation member 2 protrudes in a direction away from the outer circumferential surface of the sleeve 3, or the circumferential wall of the sleeve 3 is provided with a through hole communicating an outer region of the sleeve 3 with an inner region of the sleeve 3. Alternatively, the sleeve 3 is provided with the energy dissipator 2 and the through hole.

The energy dissipation part 2 plays a role in dissipating tidal energy through turbulence, so that the purpose of active scour prevention is achieved, soil around the pile foundation 1 is effectively protected, and a scour pit is avoided. Specifically, because the energy dissipation member 2 protrudes from the outer peripheral surface of the first part 11 in a direction away from the outer peripheral surface of the first part 11, when the tide contacts the energy dissipation member 2, the energy dissipation member 2 can 'break up' the tide, the flow speed and the direction of the tide are locally changed, the energy of the tide is dissipated to a certain extent, a large horseshoe-shaped vortex cannot be generated in front of the pile foundation 1, and the formation of the horseshoe-shaped vortex is restrained from the source.

When tide rushes to the sleeve 3 provided with the through hole, the through hole penetrates through the peripheral wall of the sleeve 3, tide can enter the sleeve 3 through the through hole to play a role in buffering, impact force of the tide on the pile foundation 1 is reduced, and formation of a horseshoe-shaped vortex is restrained.

According to the offshore wind power anti-scouring device 100 provided by the embodiment of the utility model, the sleeve 3 with the energy dissipation part 2 is arranged on the pile foundation 1, and the energy dissipation part 2 actively disturbs the tide rushing towards the sleeve 3 to locally change the flow speed and direction of the tide, so that the energy of the tide is dissipated to a certain extent. The energy dissipation piece 2 has the effects of dissipating energy and reducing impact, inhibiting the formation of horseshoe-shaped vortexes near the sleeve 3, effectively protecting soil around the sleeve 3 and avoiding the formation of scouring pits. Compared with the stone throwing protection method in the related art, the stone throwing protection method has the advantages of stronger stability, better anti-scouring effect and better reliability.

Therefore, the offshore wind power anti-scouring device 100 according to the embodiment of the utility model has the advantages of good turbulent flow effect, higher stability and the like.

In some embodiments, the dissipator 2 is plural, and plural dissipators 2 are arranged in the axial direction of the sleeve 3, and/or plural dissipators 2 are arranged in the circumferential direction around the sleeve 3.

For example, as shown in fig. 1 to 8, the axial direction of the sleeve 3 is the up-down direction, and the energy dissipater 2 may include a plurality of energy dissipaters 2 arranged in different ways. Some common arrangements are described below:

first, a plurality of energy dissipaters 2 are arranged in the up-down direction of the sleeve 3, for example, the plurality of energy dissipaters 2 are arranged in a straight line in the up-down direction.

Second, a plurality of dissipaters 2 are arranged in the circumferential direction of the sleeve 3, for example, a plurality of dissipaters 2 are arranged in the circumferential direction of the sleeve 3 in an annular shape around the sleeve 3.

Thirdly, a plurality of energy dissipaters 2 are arranged in the up-down direction of the sleeve 3 and the circumferential direction of the sleeve 3. For example, the plurality of energy dissipaters 2 are arranged not only in a straight line in the vertical direction but also in a ring shape in the circumferential direction of the sleeve 3.

In addition, in other embodiments, the plurality of energy dissipaters 2 are arranged in a polygonal shape such as a pentagram, a triangle, or the like on the outer circumferential surface of the sleeve 3, or the plurality of energy dissipaters 2 are arranged randomly.

In some embodiments the dissipaters 2 dissipate energy in a first direction relative to the outer periphery of the sleeve 3, the dissipaters 2 having a dimension in the first direction which is the height of the dissipaters 2, the dissipaters 2 arranged in the axial direction of the sleeve 3 comprising a plurality of different heights, and/or the dissipaters 2 arranged in the circumferential direction of the sleeve 3 comprising a plurality of different heights.

In order to make the technical solution of the present application easier to understand, the technical solution of the present application is further described below by taking the example that the first direction coincides with the radial direction of the pile foundation 1.

The radial direction of the sleeve 3 is a direction perpendicular to the center line of the sleeve 3, in other words, the radial direction of the sleeve 3 is perpendicular to the outer peripheral surface of the sleeve 3. For convenience of description, the energy dissipater 2 is fixed on the outer peripheral surface of the sleeve 3 and extends outward in the radial direction of the sleeve 3 with the direction close to the center line of the sleeve 3 being inward and the direction away from the center line of the sleeve 3 being outward, and the dimension of the energy dissipater 2 in the radial direction of the sleeve 3 is the height of the energy dissipater 2.

For example, a plurality of energy dissipaters 2 are arranged in the up-down direction of the sleeve 3, the plurality of energy dissipaters 2 having different heights, in other words, the plurality of energy dissipaters 2 are arranged in a staggered manner in the up-down direction; or, a plurality of energy dissipaters 2 are arranged along the circumferential direction of the sleeve 3, and the heights of the plurality of energy dissipaters 2 are different, in other words, the plurality of energy dissipaters 2 are arranged in a staggered manner in the circumferential direction; alternatively, the plurality of energy dissipaters 2 arranged in the axial direction and the circumferential direction of the sleeve 3 may have different heights, that is, at least two energy dissipaters 2 among the plurality of energy dissipaters 2 may have different heights. For example, the height of the dissipaters 2 may be different, or the height of each dissipater 2 may be the same.

From this, through setting up different heights, increase the irregularity of the energy dissipation piece 2 of setting, energy dissipation piece 2 is when facing trend and horseshoe vortex, can break up the law of flow of trend and horseshoe vortex better and break up in disorder, the bigger degree changes rivers flow direction and velocity of flow upwards, the scour protection ability of marine wind power anti-scouring device 100 of reinforcing, and make marine wind power anti-scouring device 100 can deal with the trend and the horseshoe vortex of multiple energy gradient, the adaptability of marine wind power anti-scouring device 100 has been strengthened.

In some embodiments the dissipaters 2 comprise one or more of dissipater nails, dissipater strips, dissipater mesh, the sleeve 3 having an outer diameter De.

The energy dissipation nails are arranged on the outer peripheral surface of the sleeve 3 at intervals, the ratio of the axial dimension of the energy dissipation nails in the sleeve 3 to the circumferential dimension of the energy dissipation nails around the sleeve 3 is greater than or equal to 1/2 and less than or equal to 2, the extension direction of the energy dissipation strips is parallel to the outer peripheral surface of the sleeve 3, the extension length of the energy dissipation strips is greater than or equal to 0.1De, and the energy dissipation net is a net-shaped structure covering at least one part of the outer peripheral surface of the sleeve 3.

For example, as shown in fig. 2, a plurality of energy dissipation pins are arranged at intervals in the length direction of the pile foundation 1 and/or in the circumferential direction around the pile foundation 1, and the ratio of the dimension of the energy dissipation pins in the up-down direction of the sleeve 3 to the dimension of the energy dissipation pins in the circumferential direction around the sleeve 3 is 1/2 or more and 2 or less. The ratio of the dimension of the energy dissipation nail in the vertical direction of the sleeve 3 to the dimension of the energy dissipation nail in the circumferential direction around the sleeve 3 is more than 0.5, 1, 1.5, 2 and the like. Optionally, the interval between two adjacent energy dissipation nails is greater than or equal to 0.25De and less than or equal to 1.0 De.

For example, as shown in fig. 1, the energy dissipation strips are strip-shaped structures, and the extending direction of the energy dissipation strips is parallel to the outer circumferential surface of the sleeve 3, that is, the energy dissipation strips annularly surround the outer circumferential surface of the sleeve 3. Alternatively, the ratio of the length (dimension of the energy dissipating strip in the extending direction) to the width (dimension of the energy dissipating strip in the up-down direction) of the energy dissipating strip is 5 or more. The extending length of the energy dissipation strip is more than or equal to 0.1De (De is the outer diameter of the sleeve 3). Furthermore, in other embodiments, the energy-dissipating strips may be spirally wound around the sleeve 3, or the energy-dissipating strips may extend in the up-and-down direction.

For example, as shown in fig. 6 and 7, the energy dissipating net has a net structure, and the energy dissipating net is coated on a part of the outer circumferential surface of the sleeve 3. Optionally, the area of the energy dissipation net is greater than or equal to 1.0 pi De²The area of the energy dissipation net is defined by the outer contour of the projection of the energy dissipation net on the outer peripheral surface of the sleeve 3.

In some embodiments, the energy dissipaters 2 include a plurality of energy dissipater nails, energy dissipater strips, energy dissipater nets, and a plurality of types of energy dissipaters 2 are alternately distributed on the outer circumferential surface of the sleeve 3.

For example, as shown in fig. 9 to 12, energy dissipating nails are arranged between adjacent energy dissipating strips, or energy dissipating nails are arranged in a mesh of an energy dissipating net.

In addition to this, in other embodiments the same kind of dissipator 2 has a different shape, the dissipator 2 of different shape being distributed alternately on the outer peripheral surface of the sleeve 3.

The dissipater 2 is cut, for example, in a plane perpendicular to the centre line of the sleeve 3, resulting in a cross section of the dissipater 2. The cross section of the energy dissipation member 2 can be made into geometric figures such as triangle, rectangle, semicircle and the like, or irregular figures. When arranging energy dissipation nail and energy dissipation strip simultaneously on sleeve 3, the energy dissipation nail of different positions can set up different cross sectional shape, and the energy dissipation strip of different positions can set up different cross sectional shape. Furthermore, when only one type of dissipator 2 is arranged on the sleeve 3, different cross-sectional shapes can be provided for dissipators 2 in different positions.

From this, the energy dissipation piece 2 of different grade type distributes on sleeve 3 in turn to can increase the irregularity of the energy dissipation piece 2 that sets up on sleeve 3, make marine wind power anti-scour device 100 can deal with the trend and the horseshoe vortex of multiple energy gradient, strengthened marine wind power anti-scour device 100's adaptability. Moreover, the alternating distribution of the energy dissipaters 2 of various types can also enable the turbulent flow effects of the energy dissipaters 2 of different types to be mutually superposed, further enhance the energy dissipation and impact reduction effects of the energy dissipaters 2, and enhance the anti-scouring capability of the offshore wind power anti-scouring device 100.

Alternatively, in the up-down direction, a plurality of types of dissipaters 2 are alternately arranged. In the circumferential direction of the sleeve 3, a plurality of types of dissipaters 2 are arranged alternately.

In some embodiments the dissipaters 2 and the through holes alternate on the circumferential wall of the sleeve 3.

For example, as shown in fig. 9 to 12, on the outer peripheral wall of the sleeve 3, the energy dissipating nails and the through holes are alternately arranged. Or, on the periphery wall of sleeve 3, arranged energy dissipation nail, energy dissipation hole and energy dissipation strip simultaneously. Alternatively, an energy dissipation mesh is disposed on the outer peripheral wall of the sleeve 3, and energy dissipation nails or holes are disposed in the mesh of the energy dissipation mesh. From this, the irregularity of the energy dissipation piece 2 that further increases and set up on the sleeve 3 for the vortex effect of different grade type energy dissipation piece 2 superposes each other, and the energy dissipation of further reinforcing energy dissipation piece 2 subtracts towards the effect, strengthens marine wind power anti-scour device 100's scour prevention ability.

In some embodiments the dissipator 2 comprises a plurality of two dissipators 2 adjacent in the axial direction of the sleeve 3, and/or, two dissipators 2 adjacent in the circumferential direction around the sleeve 3,

and/or the through holes comprise a plurality of through holes which are staggered in two adjacent through holes in the axial direction of the sleeve 3 and/or staggered in two adjacent through holes in the circumferential direction around the sleeve 3.

In life, a staggered arrangement is also a common type of arrangement, which is applied here to the sleeve 3. For the energy dissipaters 2 alone, the staggered arrangement of the energy dissipaters 2 is of various forms:

first, two adjacent energy dissipaters 2 are staggered in the up-down direction of the sleeve 3, and two adjacent energy dissipaters 2 in the circumferential direction are in the same circumferential direction.

In the second type, two adjacent energy dissipaters 2 are arranged in a staggered manner in the circumferential direction of the sleeve 3, and two energy dissipaters 2 adjacent to each other in the vertical direction are on the same straight line.

Thirdly, two adjacent dissipaters 2 are not only arranged offset in the up-down direction of the sleeve 3, but also offset in the circumferential direction of the sleeve 3.

The arrangement of the through holes is the same as the arrangement of the dissipaters 2 described above, for the through holes alone, and will not be described in detail here.

The dissipaters 2 and the through holes are arranged simultaneously on the same sleeve 3, and the dissipaters 2 and the through holes can be arranged in a staggered manner as described above.

In the related art, the boundary between the pile foundation 1 and the sea bed surface is the place where the vortex is mainly formed, the impact force of the tide on the pile foundation 1 is also larger, and the number of scouring pits caused by the vortex is larger.

In some embodiments the density of dissipaters 2 and/or through holes increases towards the surface of the seabed.

For example, as shown in fig. 1, the density of the energy dissipaters 2 increases at positions on the pile foundation 1 closer to the surface of the sea bed. Therefore, the design can intensively weaken the energy of the vortex, so that the vortex can be reduced or even dissipated before reaching the seabed surface 3, and the formation of a scouring pit can be greatly reduced.

In the related art, the offshore wind power erosion prevention device 100 is disposed in a shallow water region where a tidal current mainly approaches to or departs from a coastline in a direction approximately perpendicular to the coastline when the tidal current rises and falls, so that a surface of the sleeve 3 facing the coastline and a surface facing away from the coastline are where the tidal current mainly impacts. In the two places of the sleeve 3, the impact force of the bearing tide is larger, and the number of scouring pits caused by the vortex is larger. The remaining two sides of the sleeve 3 extend in a direction substantially corresponding to the direction of the tidal current, and the remaining two sides of the sleeve 3 are mainly subjected to the frictional force and the small impact force of the tidal current.

In some embodiments the outer circumferential surface of the sleeve 3 comprises a front face facing in the direction of the flow, a back face opposite the front face, and two side faces, the density of dissipaters 2 and/or through holes distributed over both the front and back faces being greater than the density of dissipaters 2 and/or through holes distributed over both side faces.

For example, in a shallow water region, the front surface of the sleeve 3 is a surface facing away from the coastline, the surface facing away from the coastline receives the greatest tidal current impact, and the back surface of the sleeve 3 is a surface facing the coastline.

The density of dissipaters 2 arranged on the front and back of the sleeve 3 is greater relative to the remaining two sides of the sleeve 3. For example, the density of the dissipaters 2 arranged on the front and sides of the sleeve 3 is 2 times greater than the remaining two sides. Therefore, the offshore wind power anti-scouring device 100 can not only have strong anti-scouring capacity, but also reduce the manufacturing cost and the manufacturing difficulty.

It will be appreciated that the front and back faces of the sleeve 3 are exemplary. In many sea areas, the direction of the current is not uniform, for example, in some sea areas, the current flows east and west year after year, and the current flows north and south rarely occur. When the sleeve 3 is subjected to the tide of the flow of things, the sea beds on the east and west sides of the sleeve 3 are most likely to produce larger scour pits, while the sea beds on the south and north sides produce smaller scour pits. At this time, the density of dissipaters 2 arranged on the east and west sides of the sleeve 3 is greater.

In some embodiments, there is one pile foundation 1 and one sleeve 3, or there are a plurality of pile foundations 1, a plurality of pile foundations 1 are arranged at intervals, and the sleeve 3 includes a plurality of sleeves 3, and the plurality of sleeves 3 correspond to the pile foundations 1 one to one.

The number of pile foundations 1 is the same as the number of sleeves 3, and one pile foundation 1 is provided with one sleeve 3. Due to the fact that the conditions of the water areas are complex and various, in some water areas, only one position is suitable for arranging the pile foundations 1, and in other water areas, a plurality of pile foundations 1 can be arranged at intervals. Therefore, the number of the offshore wind power anti-scouring devices 100 is flexibly arranged according to working conditions, and power generation requirements are met.

In some embodiments, the central axis of the sleeve 3 coincides with the central axis of the first portion 11, and the distance between the inner circumferential surface of the sleeve 3 and the outer circumferential surface of the first portion 11 is 0.05D or more and 1D or less.

For example, as shown in fig. 1-12, the sleeve 3 is arranged coaxially with the pile foundation 1, with a space between the inner circumference of the sleeve 3 and the outer circumference of the first portion 11. Thereby, the mounting of the sleeve 3 is facilitated. Optionally, a distance between the inner circumferential surface of the sleeve 3 and the outer circumferential surface of the first portion 11 is 0.2D or more and 0.5D or less.

In some embodiments, it is characterized in that the distance from the top end of the sleeve 3 to the surface of the sea bed in the axial direction of the pile foundation 1 is greater than or equal to 0.3 De.

For example, if the distance from the top end of the sleeve 3 to the sea bed surface is too small, the distance from the top end of the sleeve 3 to the sea bed surface may be too short to allow the current to directly flow to the pile foundation 1, and thus the effect of dissipating the current may not be obtained. Therefore, the sleeve 3 must have a certain length to ensure that the sleeve 3 can dissipate the tidal current to the maximum extent in various conditions such as flood or heavy rain, thereby protecting the pile foundation 1.

In some embodiments, it is characterized in that the bottom of the sleeve 3 has an anti-settling plate 31 extending along the surface of the sea bed, the bottom surface of the anti-settling plate 31 being against the surface of the sea bed.

For example, as shown in fig. 1 to 12, the lower end portion of the sleeve 3 is provided with a sinking prevention plate 31 extending outward in the radial direction of the sleeve 3, whereby the dust prevention plate can increase the bearing area of the sleeve 3 and prevent the sleeve 3 from sinking below the sea floor surface.

Optionally, the diameter of the outer peripheral surface of the anti-sinking plate 31 is 1.2De to 3De, and the bottom area of the anti-sinking plate 31 is 0.1 pi De²To 2.5 pi De². The anti-sinking plate 31 can better play the anti-sinking function through the arrangement,preventing the sleeve 3 from sinking under the surface of the sea bed.

In some embodiments, the outer periphery of the sleeve 3 is also thrown with stones, a part of the stones are located on the anti-sinking plate 31 to prevent the sleeve 3 from inclining due to seawater impact, and another part of the stones are located on the outer periphery of the anti-sinking plate 31, so that due to the action of tide, the sea bed surface around the pile foundation 1 is easy to form a scouring pit, and the pre-thrown stones can turn over and fall into the scouring pit, thereby avoiding the enlargement of the scouring pit and enhancing the anti-scouring effect. In addition, when the stone throwing operation is carried out, the sleeve 3 and the anti-sinking plate 31 can also prevent the thrown stone from smashing the pile foundation 1, and the pile foundation has the characteristics of safety and reliability.

In some embodiments, it is characterized in that the bottom of the sleeve 3 has a soil cutting plate 32 extending into the seabed in the axial direction of the pile foundation 1, and the bottom end of the soil cutting plate 32 is a knife-edge structure.

For example, as shown in fig. 1, the lower end portion of the sleeve 3 is provided with a soil cutting plate 32 extending in the vertical direction, and the lower end surface of the soil cutting plate 32 is of a blade-shaped structure, so that the soil cutting plate 32 can be conveniently inserted into the soil of the sea bed surface, and the lower end surface of the anti-sinking plate 31 can be abutted against the upper side of the sea level, and thus the lower end of the sleeve 3 is fixed by the anti-sinking plate 31 and the soil cutting plate 32, so that not only can the sleeve 3 be prevented from shaking, but also the sleeve 3 can be prevented from being inserted below the sea level, and the energy dissipater 2 can be ensured to be located above the sea level.

Alternatively, the length of the soil cutting plate 32 in the vertical direction is 0.02De to 0.5De, for example, the length of the soil cutting plate 32 in the vertical direction is 0.02De, 0.1De, 0.3De, 0.4De, 0.5De, or the like. So set up and make soil cutting plate 32 can fix sleeve 3 better, improve sleeve 3's stability.

In some embodiments, it is characterized in that the outer circumference of the sleeve 3 is a curved surface which is concave in the direction approaching the first portion 11, and the outer diameter of the sleeve 3 increases in the direction approaching the surface of the sea bed.

For example, the outer peripheral surface of the sleeve 3 is a curved surface, the outer peripheral surface of the sleeve 3 is recessed toward the direction close to the center line of the sleeve 3, and the cross-sectional area of the sleeve 3 is gradually increased from top to bottom, so that the formation of large vortices can be reduced, and the anti-scouring capability and the practicability of the offshore wind power anti-scouring device 100 are further improved.

In some embodiments, the top end of the sleeve 3 is provided with a lifting ring. As shown in fig. 1 to 12, the sleeve 3 is fixed on the pile foundation 1 by a hoisting ring, so that the sleeve 3 is prevented from rotating, and the stability of the offshore wind power anti-scour device 100 is enhanced.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An offshore wind power anti-scour device, comprising:

the sleeve is sleeved on the first part, the bottom of the sleeve is supported on the seabed surface, an energy dissipation piece extending outwards is arranged on the outer peripheral surface of the sleeve, and/or a through hole is arranged on the peripheral wall of the sleeve.

2. An offshore wind power erosion protection device according to claim 1, wherein the energy dissipater is plural, and plural energy dissipaters are arranged in the axial direction of the sleeve and/or in the circumferential direction around the sleeve.

3. An offshore wind power erosion protection device according to claim 2, wherein the energy dissipaters dissipate energy in a first direction relative to the outer circumferential surface of the sleeve, the dimension of the energy dissipaters in the first direction being the height of the energy dissipaters, the energy dissipaters arranged in the axial direction of the sleeve comprise a plurality of different heights, and/or the energy dissipaters arranged in the circumferential direction of the sleeve comprise a plurality of different heights.

4. An offshore wind power scour protection according to claim 1, wherein the dissipaters comprise one or more of dissipater nails, dissipater strips, dissipater meshes, the sleeve having an outer diameter De,

5. An offshore wind power erosion protection device according to claim 4, wherein the energy dissipaters comprise a plurality of energy dissipater nails, energy dissipater strips and energy dissipater nets, and the plurality of types of energy dissipaters are alternately distributed on the outer circumferential surface of the sleeve.

6. Offshore wind power scour protection according to claim 1, wherein the dissipaters and the through holes are alternately distributed over the circumferential wall of the sleeve.

7. Offshore wind erosion protection device according to claim 1, wherein the dissipaters comprise a plurality of two dissipaters being staggered in axial direction of the sleeve and/or in circumferential direction around the sleeve,

8. An offshore wind erosion protection device according to claim 1, wherein the density of said dissipaters and/or said through holes increases towards the surface of said seabed.

9. Offshore wind erosion protection device according to claim 1, wherein the outer circumferential surface of the sleeve comprises a front face facing in the direction of the current, a back face opposite to the front face and two side faces, the density of the dissipaters and/or through holes distributed over the front and back faces being greater than the density of the dissipaters and/or through holes distributed over the two side faces.

10. Offshore wind power scour protection according to claim 1, wherein the pile foundation is one, the sleeve is one,

11. An offshore wind power erosion protection device according to any one of claims 1-10, wherein the central axis of the sleeve coincides with the central axis of the first section, the outer diameter of the first section is D, and the distance between the inner circumferential surface of the sleeve and the outer circumferential surface of the first section is 0.05D or more and 1D or less.

12. Offshore wind power scour protection according to any one of the claims 1-10, wherein the distance of the sleeve tip to the sea bed surface in the axial direction of the pile foundation is equal to or greater than 0.3 De.

13. An offshore wind power erosion protection device according to any one of claims 1-10, wherein the bottom of the sleeve is provided with an anti-sink plate extending along the sea bed surface, the bottom surface of the anti-sink plate abutting against the sea bed surface.

14. Offshore wind power scour protection according to any one of the claims 1-10, wherein the bottom of the sleeve has a soil cutting plate extending in the axial direction of the pile foundation into the seabed, the bottom end of the soil cutting plate being a blade-shaped structure.

15. An offshore wind power erosion protection device according to any one of claims 1-10, wherein the outer circumference of the sleeve is curved concave towards the first section, the outer diameter of the sleeve increasing towards the surface of the sea bed.