CN216640698U

CN216640698U - Offshore wind power anti-scouring device with energy dissipation strips

Info

Publication number: CN216640698U
Application number: CN202122251474.1U
Authority: CN
Inventors: 邱旭; 穆延非; 叶昭良; 成志平; 单峻; 袁辉; 杨勇文
Original assignee: Huaneng Power International Jiangsu Energy Development Co Ltd; Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Shengdong Rudong Offshore Wind Power Co Ltd
Current assignee: Huaneng Power International Jiangsu Energy Development Co Ltd; Huaneng Clean Energy Research Institute; Clean Energy Branch of Huaneng International Power Jiangsu Energy Development Co Ltd Clean Energy Branch; Shengdong Rudong Offshore Wind Power Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-05-31
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses an offshore wind power anti-scouring device with energy dissipation strips, which comprises a pile foundation and a sleeve, wherein the pile foundation comprises a first part and a second part, the sleeve is sleeved on the first part and is provided with the energy dissipation strips for protecting the pile foundation, the ratio of the length to the width of each energy dissipation strip is more than or equal to 5, the energy dissipation strips extend along the peripheral surface of the sleeve, the outer diameter of the sleeve is De, and the length of each energy dissipation strip in the extending direction of the peripheral surface of the sleeve is more than or equal to 0.1 De. According to the utility model, the sleeve is arranged on the pile foundation, and the energy dissipation strips arranged on the sleeve can change the flow velocity and the flow direction of the tide and disperse the scouring force of the tide, so that the effect of protecting the pile foundation is achieved.

Description

Offshore wind power anti-scouring device with energy dissipation strips

Technical Field

The utility model relates to the technical field of new energy, in particular to an offshore wind power anti-scouring device with energy dissipation strips.

Background

Wind energy is increasingly gaining attention as a 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.

Most of accidents of offshore wind generating sets are caused by unstable pile foundations, due to the action of offshore waves and tidal currents, silt around the pile foundations of the offshore wind generating sets can be washed out and form flushing pits, the flushing pits can influence the stability of the pile foundations, water current mixed with the silt near the surface of a seabed continuously washes the pile foundations, the surface of the pile foundations is corroded and damaged, and the offshore wind generating sets can collapse in severe cases.

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 with energy dissipation strips, which has the effect of dissipating tidal current energy, achieves the purpose of active anti-scouring, effectively protects soil around a pile foundation and avoids the formation of scouring pits.

The offshore wind power anti-scouring device with the energy dissipation strips comprises a pile foundation and a sleeve;

the pile foundation includes a first portion and a second portion, the second portion being buried in a seabed having a seabed surface, the first portion being located above the seabed surface.

The sleeve is sleeved on the first portion, the bottom of the sleeve is supported on the seabed surface, an energy dissipation strip protruding outwards is arranged on the outer peripheral surface of the sleeve, the ratio of the length to the width of the energy dissipation strip is greater than or equal to 5, the energy dissipation strip extends along the outer peripheral surface of the sleeve, the outer diameter of the sleeve is De, and the length of the energy dissipation strip in the extending direction of the energy dissipation strip is greater than or equal to 0.1 De.

According to the embodiment of the utility model, the sleeve is arranged on the pile foundation, and the energy dissipation strips protruding outwards are arranged on the outer peripheral surface of the sleeve, so that the flow velocity and the flow direction of the tide can be changed, the scouring force of the tide is dispersed, the effect of dissipating the energy of the tide is achieved, the purpose of active scour prevention is achieved, the soil around the pile foundation is effectively protected, and the formation of a scour pit is avoided.

In some embodiments, the energy dissipation strip surrounds the sleeve, the energy dissipation strip is plural, and the energy dissipation strips are arranged at intervals in the axial direction of the sleeve.

In some embodiments, the distance between two adjacent energy dissipation strips decreases towards the surface of the seabed.

In some embodiments, the energy dissipater strip extends in the axial direction of the sleeve, and the plurality of energy dissipater strips are spaced apart in the circumferential direction around the sleeve.

In some embodiments, the outer circumferential surface of the sleeve comprises a front surface facing the direction of flow, a back surface opposite to the front surface, and two side surfaces, and the distance between adjacent energy-dissipating strips distributed on the front surface and the back surface is smaller than the distance between adjacent energy-dissipating strips distributed on the two side surfaces.

In some embodiments, the energy dissipater strip protrudes in a first direction, the first direction being orthogonal to the axial direction of the sleeve, the dimension of the energy dissipater strip in the first direction being the height of the energy dissipater strip, the energy dissipater strip being a plurality, at least two of the energy dissipater strips in the plurality differing in height.

In some embodiments, the energy dissipation strips are a plurality of which have at least two cross-sectional shapes, and the energy dissipation strips having different cross-sectional shapes are alternately arranged in the axial direction of the sleeve and/or in the circumferential direction around the sleeve.

In some embodiments, the bottom of the sleeve is provided with an anti-sinking plate extending along the sea bed surface, the bottom surface of the anti-sinking plate is abutted against the sea bed surface, the bottom of the sleeve is provided with a soil cutting plate extending towards the sea bed along the axial direction of the pile foundation, and the bottom end of the soil cutting plate is of a blade-shaped 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 sea bed surface.

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

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

Figure 1 is a schematic view of the uniform distribution of energy dissipating strips according to another embodiment of the present invention.

Figure 2 is a schematic view of the uneven distribution of the energy dissipating strips according to another embodiment of the present invention.

Figure 3 is a schematic view of the uniform distribution of the energy dissipating strips according to yet another embodiment of the present invention.

Figure 4 is a schematic view of the uneven distribution of the dissipater strip according to a further embodiment of the present invention.

Reference numerals:

a pile foundation 001;

first part 10, sleeve 20, anti-sinking plate 30, second part 40, energy dissipation strip 50

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.

The offshore wind power erosion prevention device with energy dissipation strips according to the embodiment of the utility model is described below according to fig. 1-4, and specifically as shown in fig. 1 and 2, the offshore wind power erosion prevention device comprises a pile foundation 001 and a sleeve 20, the pile foundation 001 comprises a first part 10 and a second part 40 which are connected with each other in the axial direction of the pile foundation, the second part 40 is buried in a seabed, the seabed has a seabed surface, the first part 10 is located above the seabed surface, the first part 10 and the second part 40 integrally form the pile foundation 001, the sleeve 20 is sleeved on the first part 10, the bottom of the sleeve 20 is supported on the seabed surface, the bottom of the sleeve 20 is located above the seabed surface, and a hanging ring is further arranged at the top of the sleeve 20, and the top of the sleeve is fixed by the hanging ring to ensure the stability of the sleeve.

The outer peripheral surface of the sleeve 20 is provided with an energy dissipation strip 50 protruding outwards, and the energy dissipation strip 50 extends along the outer peripheral surface of the sleeve, so that it can be understood that the energy dissipation strip 50 with a certain height (perpendicular to the axial direction of the sleeve) is arranged on the outer peripheral surface of the sleeve 20, the energy dissipation strip 50 with a certain height extends on the outer peripheral surface of the sleeve 20, and the energy dissipation strip 50 extending and arranged has the effect of dissipating tidal current energy, so that the purpose of active scour prevention is achieved, the soil around the pile foundation is effectively protected, and a scour pit is prevented from being formed.

The ratio of the length to the width of the energy dissipation strip 50 is more than or equal to 5, the outer diameter of the sleeve 20 is De, and the value range of De is 1m to 20 m. The length of the energy dissipation strip 50 in the extending direction thereof is equal to or greater than 0.1 De.

As shown in fig. 3 and 4, in some embodiments, the energy dissipation strips 50 surround the sleeve 20, the number of the energy dissipation strips 50 is multiple, the multiple energy dissipation strips 50 are arranged at intervals in the axial direction of the sleeve 20, the multiple energy dissipation strips 50 extending on the outer peripheral surface of the sleeve 20 are arranged around the outer peripheral surface of the sleeve 20, the energy dissipation strips 50 are annular in overall structural shape, the multiple annular energy dissipation strips 50 are arranged on the outer peripheral surface of the sleeve 20 at certain intervals in the axial direction of the sleeve 20, the multiple energy dissipation strips 50 arranged at intervals can actively disturb the flow of the flow towards the pile foundation 001, the flow speed and the direction of the flow are locally changed, the energy of the flow is dissipated to a certain extent, and the arrangement of the energy dissipation strips achieves the effects of energy dissipation and impact reduction, and the formation of horseshoe-shaped vortexes near the pile foundation is suppressed.

Specifically, as shown in fig. 4, further, in the actual use process of the offshore wind power foundation, the greater the tidal current impact on the position of the first portion 10 closer to the surface of the sea bed, the greater the possibility of generating horseshoe-shaped vortexes, and therefore, the distance between two adjacent energy dissipation strips 50 decreases toward the direction close to the surface of the sea bed, the distance between two adjacent annular energy dissipation strips 50 decreases toward the direction close to the surface of the sea bed, in this embodiment, the number of the energy dissipation strips 50 is five, the distances between adjacent energy dissipation strips 50 are sequentially 0.1De, 0.15De, 0.2De, and 0.3De, that is, in the direction along the axial direction of the sleeve 20 and toward the surface of the sea bed, the number of the annular energy dissipation strips is more and more, the annular energy dissipation strips are more and more dense near the surface of the sea bed, and by densely arranging the annular energy dissipation strips 50 on the sleeve 20 near the surface of the sea bed, the scour resistance of the foundation near the surface of the sea bed can be enhanced, the protection strength of the pile foundation at the position close to the surface of the sea bed is improved.

Specifically, as shown in fig. 3, it should be noted that two adjacent energy dissipation strips 50 may be arranged around the outer circumferential surface of the sleeve 20 at equal intervals, in this embodiment, the number of energy dissipation strips 50 is five, and the arrangement interval between adjacent energy dissipation strips 50 is 0.15De, that is, a plurality of annular energy dissipation strips 50 are uniformly arranged on the outer circumferential surface of the sleeve 20, and the plurality of uniformly arranged annular energy dissipation strips 50 are used to disperse the scouring force of the tidal current, so as to achieve the effects of energy dissipation and reducing scouring, suppress the formation of vortexes near the pile foundation, and avoid the formation of scouring pits.

It should be noted that the energy dissipation strips 50 can also be selected from the energy dissipation strips with the cross-sectional shapes of rectangle, triangle, etc., and only the requirements of the outward protruding height of the energy dissipation strips on the sleeve and the size comparison of the energy dissipation strips need to be met.

It should be noted that, the plurality of energy dissipation strips 50 may also be arranged on the outer circumferential surface of the sleeve 20 in a surrounding manner by using a combination of energy dissipation strips with different cross-sectional shapes, in this embodiment, five energy dissipation strips may be used, three of which have a rectangular cross-sectional shape, and two of which have a triangular cross-sectional shape, and two of which are disposed between two energy dissipation strips with a rectangular cross-sectional shape, and the flow velocity and direction of the power flow are locally changed by using the energy dissipation strips with different cross-sectional shapes, so that the energy of the power flow is dissipated to a certain extent, and the effect of energy dissipation and impact reduction is achieved, for example, a combination of energy dissipation strips with rectangular cross-sectional shapes and triangular cross-sectional shapes may be used.

It should be noted that, a plurality of energy dissipation strips 50 with different cross-sectional shapes may also be arranged on the outer circumferential surface of the sleeve 20 at equal intervals or gradually decrease from top to bottom along the axial direction of the sleeve 20, for example, five energy dissipation strips 50 may be selected in this embodiment, where the cross-sectional shapes of two energy dissipation strips 50 are rectangles, the cross-sectional shapes of two energy dissipation strips 50 are semicircles, the cross-sectional shape of one energy dissipation strip 50 is a triangle, the triangular energy dissipation strips are arranged between the rectangular energy dissipation strip and the semicircular energy dissipation strip, the energy dissipation strips with the same cross-sectional shape are adjacently arranged at intervals, where the arrangement intervals between the five energy dissipation strips 50 are equal intervals of 0.1De, 0.15De, 0.2De, and 0.3De, or the arrangement intervals between the five energy dissipation strips 50 may also be sequentially decreased, and the arrangement intervals are 0.3De, 0.2De, 0.15De, and 0.1 De.

In other embodiments, as shown in figures 1 and 2, the dissipater strip 50 extends axially of the sleeve 20, the dissipater strip 50 being plural, the dissipater strips 50 being spaced circumferentially around the sleeve 20, it can be understood that the energy dissipation strips 50 extend along the axial direction of the sleeve 20, the length direction of the energy dissipation strips 50 is parallel to the axial direction of the sleeve 20, one end of each energy dissipation strip 50 is located at the lower part of the upper edge of the sleeve, the other end of each energy dissipation strip 50 is located at the lower edge of the sleeve, the energy dissipation strips 50 are integrally arranged in a columnar shape along the circumferential direction of the outer circumferential surface of the sleeve 20 at intervals, a plurality of columnar energy dissipation strips 50 are arranged on the outer circumferential surface of the sleeve 20 at certain intervals, a plurality of columnar turbulence channels are formed among the columnar energy dissipation strips, the flow direction and the flow speed of the tide are changed through the columnar energy dissipation strips and the columnar turbulence channels, the effect of active turbulence is achieved, and the energy of the tide is dissipated to a certain degree.

As shown in fig. 2, the outer circumference of the sleeve 20 further includes a front surface facing the direction of the current, a back surface opposite to the front surface, and two side surfaces, and the distance between adjacent energy-dissipating strips 50 distributed on the front surface and the back surface is smaller than the distance between adjacent energy-dissipating strips 50 distributed on the two side surfaces. That is to say, the energy dissipation strips 50 can be densely arranged on the front surface of the sleeve 20 facing the tide direction and the back surface opposite to the front surface, and a small number of energy dissipation strips 50 are arranged on two sides of the sleeve 20, so that the offshore wind power foundation can have strong anti-scouring capability, the manufacturing cost can be reduced, and the manufacturing difficulty can be reduced.

It should be noted that, in order to reduce the cost, the number of the energy dissipation strips 50 arranged on the back of the sleeve 20 can be reduced, but it is ensured that the number of the energy dissipation strips 50 arranged on the back of the sleeve 20 is more than that arranged on the two side surfaces.

In other embodiments, the energy dissipating strips 50 protrude in a first direction orthogonal to the axial direction of the sleeve 20, the dimension of the energy dissipating strips 50 in the first direction is the height of the energy dissipating strips 50, the energy dissipating strips 50 are plural, and the height of at least two energy dissipating strips 50 in the plural energy dissipating strips 50 is different. That is to say, the protruding height of a plurality of energy dissipation strips 50 that encircle the setting on sleeve 20 outer peripheral face is different, and the setting quantity of energy dissipation strip 50 is five in this embodiment, wherein there are three kinds of not high energy dissipation strips 50, and specific height is 0.05De, 0.075De, 0.1De, wherein forms certain difference in height between the not high energy dissipation strips 50, can form certain vortex ladder through this difference in height, and the vortex ladder cooperates the energy dissipation strip and improves the ability that changes trend velocity of flow and flow direction greatly, strengthens the energy dissipation to the trend and subtracts towards the effect.

It should be noted that the energy dissipation strips 50 can be arranged by selecting a combination of various different heights, different cross-sectional shapes, different arrangement intervals and the like, for example, when five energy dissipation strips 50 are selected, three energy dissipation strips 50 with different heights and cross-sectional shapes of a rectangle and a triangle can be selected and arranged along the axial direction of the sleeve 20 or the circumferential direction of the sleeve 20 according to an equidistant arrangement mode, the three different heights are 0.05De, 0.075De and 0.1De respectively, and the equidistant distance is 0.15 De; or three energy dissipation strips 50 with different heights and cross-sectional shapes respectively being rectangular and triangular can be arranged along the axial direction of the sleeve 20 or the circumferential direction of the sleeve 20 according to the arrangement mode that the distance between the energy dissipation strips is gradually reduced along the direction close to the sea bed surface, and the arrangement distance is respectively 0.3De, 0.2De, 0.15De and 0.1 De.

In other embodiments, the number of the energy dissipation strips 50 is plural, the number of the cross-sectional shapes of the plural energy dissipation strips 50 includes at least two, and the energy dissipation strips 50 with different cross-sectional shapes are alternately arranged in the axial direction of the sleeve 20 and/or in the circumferential direction around the sleeve 20, that is, the energy dissipation strips 50 with different cross-sectional shapes may be alternately arranged in the axial direction of the sleeve 20 and/or in the circumferential direction around the sleeve 20, for example, three energy dissipation strips 50 with different cross-sectional shapes, such as triangle, rectangle and semicircle, may be alternately arranged at a certain interval in the axial direction of the sleeve 20, or may be alternately arranged at a certain interval in the circumferential direction of the sleeve 20, or may be alternately arranged at a certain interval in the upper half part of the sleeve 20, triangular energy dissipation strips, rectangular energy dissipation strips and semicircular energy dissipation strips are alternately arranged in the lower half part of the sleeve 20 along the axial direction of the sleeve 20.

In other embodiments, as shown in fig. 1 and 2, the bottom of the sleeve 20 has an anti-sinking plate 30 extending along the surface of the sea bed, the bottom surface of the anti-sinking plate 30 is abutted against the surface of the sea bed, the anti-sinking plate 30 has a circular ring shape in its overall structure, and the area of the bottom surface of the anti-sinking plate is 0.1 pi De²To 2.5 pi De². Prevent that heavy board 30 cover establishes on pile foundation 001 and prevent that heavy board 30 is located sleeve 20 bottom and sea bed surface intersection to prevent that heavy board 30 outwards extends the certain distance along the sea bed surface, the effect that supports sleeve 20 can be played to the board 30 that prevents sinking that outwards extends on the one hand, and on the other hand can also play the vortex scour protection, and can also protect the pile foundation when throwing the stone construction, avoid the pile foundation to be pounded by throwing the stone and hinder.

As shown in fig. 2, the bottom of the sleeve 20 has a soil cutting plate extending into the seabed along the axial direction of the pile foundation 001, the bottom end of the soil cutting plate is a blade-shaped structure, and the length of the soil cutting plate is 0.02De to 0.5 De. That is, the bottom of the sleeve 20 is further provided with a soil cutting plate extending along the axial direction of the pile foundation, the soil cutting plate surrounds the pile foundation 001, the thickness of the soil cutting plate is gradually reduced from top to bottom along the axial direction of the soil cutting plate, that is, the thickness of the bottom end of the soil cutting plate is smaller than the thickness of the position far away from the bottom end of the soil cutting plate, and then a structure similar to a knife edge is formed at the bottom end of the soil cutting plate, and the bottom end knife edge structure of the soil cutting plate is convenient for being quickly inserted and fixed in the seabed.

In other embodiments, the outer peripheral surface of the sleeve 20 is a curved surface that is concave toward the direction close to the first portion, and the outer diameter of the sleeve 20 increases toward the direction close to the seabed surface, which can be understood that the overall cross-sectional shape of the sleeve 20 is similar to a trumpet shape, and the outer diameter of the end of the sleeve 20 away from the seabed surface is smaller than the outer diameter of the end of the sleeve 20 close to the seabed surface, that is, the end with the larger outer diameter is close to the anti-settling plate 30, and the outer peripheral surface of the sleeve 20 is streamline overall, so that the formation of large vortexes is reduced.

In other embodiments, the distance from the top end of the sleeve 20 to the surface of the sea bed in the axial direction of the pile foundation 001 is greater than or equal to 0.3De, that is, the distance from the upper edge of the sleeve to the anti-sinking plate 30 is at least 0.3De, which can ensure that the vortex within the height of 0.3De is broken, and ensure the energy consumption effect.

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 explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; 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. The utility model provides an offshore wind power anti-scour device with energy dissipation strip which characterized in that includes:

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 portion, the bottom of the sleeve is supported on the seabed surface, an energy dissipation strip protruding outwards is arranged on the outer peripheral surface of the sleeve, the ratio of the length to the width of the energy dissipation strip is larger than or equal to 5, the energy dissipation strip extends along the outer peripheral surface of the sleeve, the outer diameter of the sleeve is De, and the length of the energy dissipation strip in the extending direction of the energy dissipation strip is larger than or equal to 0.1 De.

2. An offshore wind power erosion protection device with energy dissipation strips as claimed in claim 1, wherein the energy dissipation strips surround the sleeve, the energy dissipation strips are multiple, and the energy dissipation strips are arranged at intervals in the axial direction of the sleeve.

3. An offshore wind power erosion protection device with energy dissipation strips as claimed in claim 2, wherein the distance between two adjacent energy dissipation strips decreases towards the surface of the sea bed.

4. An offshore wind turbine scour protection having energy dissipaters according to claim 1, wherein the dissipaters extend in the axial direction of the sleeve and are spaced apart in the circumferential direction around the sleeve.

5. An offshore wind turbine scour protection with energy dissipaters according to claim 4, wherein the outer circumferential surface of the sleeve comprises a front surface facing in the direction of the current, a rear surface opposite the front surface and two side surfaces, the spacing between adjacent dissipaters distributed over the front and rear surfaces being smaller than the spacing between adjacent dissipaters distributed over the two side surfaces.

6. An offshore wind power scour protection having energy dissipaters according to claim 1, wherein the dissipaters project in a first direction orthogonal to the axial direction of the sleeve, the dimension of the dissipaters in the first direction being the height of the dissipaters, the dissipaters being plural, at least two of the dissipaters being of different height.

7. An offshore wind turbine scour protection with energy dissipaters according to claim 1, wherein the dissipaters are plural and include at least two cross-sectional shapes, and the dissipaters with different cross-sectional shapes are arranged alternately in the axial direction of the sleeve and/or in the circumferential direction around the sleeve.

8. Offshore wind power scour protection with energy dissipater strips according to any one of claims 1 to 7, wherein the bottom of the sleeve has an anti-settling plate extending along the surface of the seabed, the bottom surface of the anti-settling plate being against the surface of the seabed,

the bottom of the sleeve is provided with a soil cutting plate extending towards the seabed along the axial direction of the pile foundation, and the bottom end of the soil cutting plate is of a blade-shaped structure.

9. An offshore wind power erosion prevention device with energy dissipation strips as in any one of claims 1-7, wherein the outer circumference of the sleeve is curved concave towards the first section, and the outer diameter of the sleeve increases towards the surface of the sea bed.

10. Offshore wind turbine scour protection with energy dissipaters according to any one of claims 1 to 7, wherein the distance of the top end of the sleeve to the surface of the sea bed in the axial direction of the pile foundation is equal to or greater than 0.3 De.