CN214832416U

CN214832416U - Offshore wind power foundation anti-scouring system with multi-layer grid strip-shaped structure

Info

Publication number: CN214832416U
Application number: CN202121264651.3U
Authority: CN
Inventors: 张庆; 张立英; 郭辰; 李芊; 邵振州
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-11-23
Anticipated expiration: 2031-06-04

Abstract

The utility model provides an offshore wind power foundation anti-scouring system with a multilayer grid belt structure, which comprises a plurality of grid belts; each grid belt comprises a plurality of grid layers, and each grid layer consists of a plurality of grid units; each grid unit is formed by surrounding a plurality of grids; each grid is vertically fixed between two upright posts through a connecting device. The utility model reduces the flow velocity of water flow through the grating, blocks the flow of silt close to the bottom layer of the seabed, and finally achieves the purpose of preventing the base from scouring; the multi-layer grid structure enhances the flow blocking rigidity of the grating and can provide a basic anti-scouring effect in a sea current environment with variable flow directions; the arrangement of the plurality of grating belts further enhances the anti-scouring effect of the underwater foundation.

Description

Offshore wind power foundation anti-scouring system with multi-layer grid strip-shaped structure

Technical Field

The utility model belongs to the technical field of wind power generation, concretely relates to marine wind power basis scour prevention system of multilayer net band structure.

Background

The periphery of the offshore wind power foundation is easily influenced by seabed water flow to form a scouring pit, so that the burial depth of the foundation is reduced, and the safe and stable operation of a wind turbine is influenced. At present, offshore wind power foundation anti-scour measures are divided into active protection and passive protection. Active protection generally achieves the anti-scouring purpose by reducing the flow velocity of water in a protection area, such as protection of a base front deflector and the like. Passive protection is achieved by laying a protective layer within the confines of the foundation to improve erosion resistance, such as by laying rocks, concrete blocks, sandbags, concrete hinge rows, etc. within the protected area. The conventional offshore wind power foundation anti-scouring measures generally have the problems of high construction cost and general protection effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a marine wind power basis scour prevention system of multilayer net band structure can reduce the velocity of flow in the guard space, and the stagnant silt flows, reaches the purpose of basic scour prevention.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an offshore wind power foundation anti-scouring system with a multilayer grid belt structure comprises a plurality of grid belts; each grid belt comprises a plurality of grid layers, and each grid layer consists of a plurality of grid units; each grid unit is formed by surrounding a plurality of grids;

each grid is vertically fixed between two upright posts through a connecting device.

The utility model discloses further improvement lies in: the grid is made of corrosion-resistant metal or fiber; the porosity of the grid is 20% -50%.

The utility model discloses further improvement lies in: the upright column is a corrosion-resistant metal column body and can be buried in a seabed.

The utility model discloses further improvement lies in: the connecting device is a corrosion-resistant metal connecting piece; the side wall of the connecting device is provided with a plurality of wedge ports; the grid is mounted in a wedge of a corresponding connection device.

The utility model discloses further improvement lies in: the cross section of the connecting device is square or round; the center of the connecting device is provided with a through hole; the upright post is installed in the through hole.

The utility model discloses further improvement lies in: the section of the wedge opening is rectangular or trapezoidal.

The utility model discloses further improvement lies in: one or more grid strips are arranged along the dominant flow direction of the seabed water flow in front of the offshore wind power foundation.

The utility model discloses further improvement lies in: the grid bands are arranged in a non-equidistant mode, and the interval of adjacent layers along the dominant flow direction is gradually increased.

The utility model discloses further improvement lies in: the water flow direction separation device comprises three grating belts, the width of each grating belt is L, the distance between a first grating belt and a second grating belt along the water flow direction is L1, the distance between a second grating belt and a third grating belt along the water flow direction is L2, and L2 is larger than or equal to L1 and larger than or equal to L.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses a grid reduces the velocity of flow, and the silt that is close to the seabed bottom is blockked to flow, finally reaches the purpose of basic scour prevention.

The utility model discloses a multilayer grid structure has strengthened the rigidity of grid choked flow, can provide basic scour prevention effect under the changeable ocean current environment of flow direction.

The utility model discloses a many grid areas are arranged, have further strengthened the effect of basic scour prevention under water.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:

fig. 1 is the utility model relates to a marine wind power basis scour prevention system's of multilayer net band structure overall structure schematic diagram.

Fig. 2 is the utility model relates to a connecting device cross-sectional schematic diagram of marine wind power basis scour prevention system of multilayer net band structure.

Fig. 3 is a schematic cross-sectional view of another connection device of the offshore wind power foundation anti-scouring system with a multi-layer grid belt structure of the present invention.

Fig. 4 is the utility model relates to a multilayer net band structure's many grid areas of marine wind power basis scour prevention system arrange the schematic diagram.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.

Example 1

Referring to fig. 1, an offshore wind power foundation anti-erosion system with a multi-layer grid band structure includes a plurality of grid bands 100; each grid belt 100 comprises a plurality of grid layers 101, and each grid layer 101 consists of a plurality of grid units 102; each grid unit is formed by surrounding a plurality of grids 1;

each grid 1 is vertically fixed between two upright posts 2 through a connecting device 3; the enclosed space enclosed by the grids 1 is a grid unit 102.

The grid 1 is made of corrosion-resistant metal materials or high-strength fiber materials, and the porosity of the grid is 20% -50%.

The upright post 2 is a corrosion-resistant metal cylinder, is buried in the seabed and fixed, and can be round, square or other shapes in cross section.

Referring to fig. 2 and 3, the connecting device 3 is a corrosion-resistant metal connecting piece, the cross section of the connecting device is square or circular with a wedge 31, and a through hole 30 is formed in the center of the connecting device 3; the cross-sectional shape of the through-hole 30 conforms to the cross-sectional shape of the pillar 2. The upright post 2 is in interference fit with the through hole 30. The section of the wedge 31 is rectangular or trapezoidal; the arrangement is trapezoidal and can be interlocked with the trapezoidal matching of the edge of the grille 1, and the grille 1 is prevented from being separated from the connecting device 3 by force.

And the grid units are connected into a whole through the connecting device 3 and are fixed on the seabed through the upright posts 2.

The cross section of the grid cell can be square, rectangular, hexagonal or other shapes.

The length, width and height of the grid belt can be spliced and adjusted according to the flow speed of the seabed water and the space environment.

One or more grid belts can be arranged in front of the underwater foundation of the fan and along the dominant flow direction of the water flow at the bottom of the sea.

Example 2

The grid strips can be arranged in a non-equidistant arrangement mode, and the intervals of adjacent layers along the dominant flow direction are gradually increased.

Referring to fig. 4, an offshore wind power foundation anti-scour system with a multi-layer grid band structure adopts three grid bands, the width of each grid band is L, the distance between a first grid band and a second grid band along the water flow direction is L1, the distance between a second grid band and a third grid band along the water flow direction is L2, and the relationship that L2 is greater than or equal to L1 is greater than or equal to L is satisfied.

The utility model also provides a multilayer grid belt structure's marine wind power basis anti-scouring method, based on embodiment 1 or embodiment 2's a multilayer grid belt structure's marine wind power basis anti-scouring system, including following step:

arranging one or more grid belts along the dominant flow direction of the seabed water flow in front of the offshore wind power foundation; through the multilayer grid in the grid area, reduce the velocity of flow, block the silt that is close to the seabed bottom and flow, reduce the scouring of silt flow to offshore wind power basis.

Specifically, in each grid band:

step one, seawater flows through a first layer of grid units of a grid belt, silt in the seawater is blocked by grids 1 in the first layer of grid units, and the collision flow velocity of the seawater and the grids 1 in the first layer of grid units is reduced;

step two, the seawater passing through the first layer of grid units needs to flow through a second layer of grid units of the grid belt, silt in the seawater is blocked by the grids 1 in the second layer of grid units, and the collision flow speed of the seawater and the grids 1 in the second layer of grid units is reduced for the second time;

step three, the seawater passing through the second layer of grid units needs to flow through a third layer of grid units of the grid belt, silt in the seawater is blocked by the grids 1 in the third layer of grid units, and the collision flow speed of the seawater and the grids 1 in the third layer of grid units is reduced for the third time.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.

Claims

1. An offshore wind power foundation anti-scouring system with a multilayer grid belt-shaped structure is characterized by comprising a plurality of grid belts (100); each grid belt (100) comprises a plurality of grid layers (101), and each grid layer (101) consists of a plurality of grid units (102); each grid unit (102) is formed by surrounding a plurality of grids (1);

each grid (1) is vertically fixed between two upright posts (2) through a connecting device (3).

2. Offshore wind power foundation anti-scour system according to claim 1, wherein the grating (1) is made of corrosion-resistant metal or fabric; the porosity of the grid (1) is 20-50%.

3. Offshore wind power foundation anti-scour system according to claim 1, wherein the columns (2) are corrosion-resistant metal cylinders, which can be buried in the seabed.

4. Offshore wind power foundation anti-scour system with a multi-layer grid belt structure, according to claim 1, characterized in that the connection means (3) are corrosion-resistant metal connections; the side wall of the connecting device (3) is provided with a plurality of wedge ports (31); the grid (1) is mounted in a wedge (31) corresponding to the connecting device (3).

5. Offshore wind power foundation anti-scour system with a multi-layer grid belt structure, according to claim 4, characterized in that the cross-sectional shape of the connection means (3) is square or circular; a through hole (30) is arranged in the center of the connecting device (3); the upright post (2) is mounted in the through hole (30).

6. Offshore wind power foundation anti-scour system according to claim 4, wherein the wedge (31) has a rectangular or trapezoidal cross-section.

7. Offshore wind farm anti-scour system according to claim 1, wherein one or more grating strips (100) are arranged in front of the offshore wind farm along the prevailing direction of the subsea current.

8. Offshore wind power foundation anti-scour system according to claim 7, wherein the plurality of grating strips (100) are arranged at unequal intervals and the spacing of adjacent layers in the main flow direction increases gradually.

9. An offshore wind power foundation anti-scouring system with a multi-layer grid belt-shaped structure as claimed in claim 7, characterized by comprising three grid belts, wherein the width of each grid belt is L, the distance between the first grid belt and the second grid belt along the water flow direction is L1, the distance between the second grid belt and the third grid belt along the water flow direction is L2, and L2 is more than or equal to L1 and more than or equal to L.