Offshore wind power foundation anti-scour device and offshore wind power foundation anti-scour method

Abstract

The invention relates to the technical field of offshore wind power, and discloses an offshore wind power foundation anti-scour device and an offshore wind power foundation anti-scour method. The anti-scour device for the offshore wind power foundation comprises the offshore wind power foundation, a turntable mechanism, a tachymeter and an anti-scour plate. The offshore wind power foundation comprises a plurality of foundation piles arranged at intervals. The rotating disc mechanism comprises rotating disc assemblies and driving parts, the rotating disc assemblies are installed on the peripheries of the foundation piles and are adjacent to the bottoms of the foundation piles, and the driving parts are connected with the rotating disc assemblies to drive the rotating disc assemblies to rotate relative to the foundation piles; a plurality of tachymeters are annularly arranged on the periphery of each turntable assembly at intervals, and all the tachymeters are uniformly distributed; the anti-scour plate is fixed to the periphery of the rotating disc assembly and is spaced from the tachymeter. The position of the anti-scouring plate can be adjusted in real time according to ocean current speed changes, and the influence caused by ocean current scouring can be effectively reduced. In the rotating process of the anti-scouring plate, a previous scouring pit can be swept and filled.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to an offshore wind power generation foundation anti-scouring device and an offshore wind power generation foundation anti-scouring method. Background Art

[0002] As the supporting structure of offshore wind turbines, offshore wind power foundations (referred to as "foundations") ensure the safe and stable operation of offshore wind turbines. Due to the complex and changeable marine environment, after the sand and soil around the foundations start to move, the foundations are easily washed out by the combined action of waves and currents to form huge scour pits. Once scour pits are formed, the soil resistance of the seabed foundation around the foundation will be weakened, resulting in a decrease in the bearing capacity of the foundation and causing deformation and failure of the wind turbine.

[0003] In response to the current situation of severe foundation scour, many anti-scour technical solutions have emerged in actual projects. At present, the more commonly used protection methods include riprap and sand blankets, but these methods are prone to secondary scour and often require multiple post-maintenance.

[0004] Therefore, it is urgent to develop a more effective and economical foundation anti-scouring solution. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide an offshore wind power foundation anti-scouring device and an offshore wind power foundation anti-scouring method, which can effectively reduce the impact of scouring.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] On the one hand, an offshore wind power foundation anti-scour device is provided, comprising:

[0008] Offshore wind power foundation, including a number of foundation piles arranged at intervals;

[0009] A turntable mechanism, the turntable mechanism comprising a turntable assembly and a driving unit, the turntable assembly being mounted on the periphery of each foundation pile and adjacent to the bottom of the foundation pile, the driving unit being connected to the turntable assembly to drive the turntable assembly to rotate relative to the foundation pile;

[0010] Speedometers, a plurality of speedometers are arranged on the outer peripheral spacer ring of each rotating disk assembly, and all the speedometers are evenly distributed;

[0011] An anti-scour plate is fixed to the outer periphery of the turntable assembly and is spaced apart from the speed meter.

[0012] As a further solution of the anti-scouring device for offshore wind power foundation, the turntable assembly includes an upper turntable, a lower turntable and a connecting part, the upper turntable and the lower turntable are respectively installed on the outer periphery of the foundation pile through bearings, and the upper turntable and the lower turntable are arranged with an upper and lower interval and fixedly connected through the connecting part, the driving part is transmission-connected to the lower turntable, the anti-scouring plate is respectively fixedly connected to the outer periphery of the upper turntable and the lower turntable, and the speed meter is installed on the lower turntable.

[0013] As a further solution of the offshore wind power foundation anti-scour device, the length of the connecting portion extends along the axis of the foundation pile, and the connecting portion is gap-matched with the outer periphery of the foundation pile.

[0014] As a further solution of the anti-scour device for offshore wind power foundation, it also includes an intermediate connecting member, which includes a first connecting seat and a second connecting seat, the first connecting seat is installed on the outer periphery of the upper turntable, and the second connecting seat is installed on the outer periphery of the lower turntable, the driving part is installed on the second connecting seat and connected to the lower turntable, and the anti-scour plate is connected to the first connecting seat and the second connecting seat.

[0015] As a further solution of the anti-scour device for offshore wind power foundation, the length of the anti-scour plate extends along the axis of the foundation pile.

[0016] As a further solution of the offshore wind power foundation anti-scour device, the angle between the line connecting the anti-scour plate and the center of the foundation pile and the line connecting the connecting portion and the center of the foundation pile is 180°.

[0017] As a further solution of the anti-scour device for offshore wind power foundation, the anti-scour plate is a streamlined symmetrical structure.

[0018] As a further solution of the anti-scour device for offshore wind power foundation, the anti-scour plate has a first end facing the foundation pile and a second end away from the foundation pile, the width of the anti-scour plate extends along the first direction, that is, the first end of the anti-scour plate is toward the second end, the thickness of the anti-scour plate extends along the second direction, the first direction, the second direction and the axial direction of the foundation pile are perpendicular to each other, and the thickness of the anti-scour plate first increases and then decreases in the direction from the first end toward the second end.

[0019] As a further solution of the offshore wind power foundation anti-scour device, the number of the velocimeters is not less than 9.

[0020] On the other hand, a method for preventing scour of an offshore wind power foundation is provided, using the above-mentioned device for preventing scour of an offshore wind power foundation. The method for preventing scour of an offshore wind power foundation comprises the following steps:

[0021] S10, collecting the speeds measured by all speed meters once at set intervals, and collecting the speed data of all speed meters within a specified total time;

[0022] S20, based on the collected speed data, all the speed meters are divided into K areas in combination with the KMEANS method and the area with the maximum speed is calculated, where K≥3;

[0023] S30, the control terminal controls the driving unit to drive the turntable assembly to drive the anti-scour plate to rotate to the area with the highest speed.

[0024] Beneficial effects:

[0025] In the present invention, the speed meter installed on the turntable assembly is used to test the ocean current speed at the corresponding position. After obtaining the ocean current speed data, the maximum ocean current speed area can be measured in combination with the KMEANS method, and the turntable assembly can be driven by the driving part to drive the anti-scouring plate to rotate to the maximum ocean current speed, and the position of the anti-scouring plate can be adjusted in real time according to the change of the ocean current speed. The use of the anti-scouring plate can effectively reduce the impact of ocean current scouring. In addition, the anti-scouring plate of the present invention can rotate synchronously with the turntable assembly, and the scouring pit that has been there before can be swept and filled during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic structural diagram of the offshore wind power foundation anti-scour device according to an embodiment of the present invention.

[0028] Figure 2 It is a side schematic diagram of the anti-scour device for offshore wind power foundation according to an embodiment of the present invention.

[0029] Figure 3 It is a schematic top view of the anti-scour device for offshore wind power foundation according to an embodiment of the present invention.

[0030] In the figure:

[0031] 100, foundation pile; 200, turntable assembly; 210, upper turntable; 220, lower turntable; 230, connection part; 300, speed meter; 400, anti-scouring plate; 401, first end; 402, second end; 500, intermediate connecting piece; 510, first connecting seat; 520, second connecting seat. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, if the terms "upper", "lower", "left", "right" and other directions or positional relationships appear, they are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", etc. appear, they are only used to distinguish in the description and have no special meaning.

[0036] like Figures 1 to 3 As shown, the offshore wind power foundation anti-scouring device of this embodiment includes an offshore wind power foundation, a turntable mechanism, a speed meter 300 and an anti-scouring plate 400.

[0037] The offshore wind power foundation includes a plurality of foundation piles 100 arranged at intervals.

[0038] The turntable mechanism includes a turntable assembly 200 and a driving unit (not shown in the figure). The turntable assembly 200 is installed on the periphery of each foundation pile 100 and adjacent to the bottom of the foundation pile 100. The driving unit is connected to the turntable assembly 200 to drive the turntable assembly 200 to rotate relative to the foundation pile 100.

[0039] A plurality of speed meters 300 are disposed on the outer peripheral spacer ring of each turntable assembly 200, and all the speed meters 300 are evenly distributed.

[0040] The anti-scouring plate 400 is fixed to the outer periphery of the turntable assembly 200 and is spaced apart from the speed meter 300 .

[0041] It is understandable that the speed meter 300 is used to test the ocean current speed at the corresponding position. After obtaining the ocean current speed data, the maximum ocean current speed area can be measured in combination with the KMEANS method, and the turntable assembly 200 can be driven by the driving unit to drive the anti-scouring plate 400 to rotate to the maximum ocean current speed, and the position of the anti-scouring plate 400 can be adjusted in real time according to the change of the ocean current speed. The use of the anti-scouring plate 400 can effectively reduce the impact of ocean current scouring. In addition, the anti-scouring plate 400 of this embodiment can rotate synchronously with the turntable assembly 200, and during the rotation process, the scouring pit that has been there before can be swept and filled.

[0042] Furthermore, the turntable assembly 200 includes an upper turntable 210, a lower turntable 220 and a connecting portion 230. The upper turntable 210 and the lower turntable 220 are respectively installed on the outer periphery of the foundation pile 100 through bearings (not shown in the figure), and the upper turntable 210 and the lower turntable 220 are arranged at intervals up and down and fixedly connected through the connecting portion 220. The driving portion is transmission-connected to the lower turntable 220, the anti-scouring plate 400 is fixedly connected to the outer periphery of the upper turntable 210 and the lower turntable 220, and the speedometer 300 is installed on the lower turntable 220.

[0043] In this embodiment, the turntable assembly 200 is designed as an upper turntable 210 and a lower turntable 220 that are connected by a connecting portion 230, which can save the material of the turntable assembly 200 on the one hand, and reduce the energy consumption of the driving portion on the other hand. The upper turntable 210 and the lower turntable 220 are respectively installed on the outer periphery of the foundation pile 100 through bearings, which can improve the rotation smoothness of the upper turntable 210 and the lower turntable 220. Among them, the anti-scouring plate 400 is fixedly connected to the outer periphery of the upper turntable 210 and the lower turntable 220, and the anti-scouring plate 400 can also serve as an intermediate connecting structure between the upper turntable 210 and the lower turntable 220, which can further improve the transmission stability of the upper turntable 210 and the lower turntable 220.

[0044] Among them, the length of the connecting part 230 extends along the axis of the foundation pile 100. In this case, the length of the connecting part 230 is the shortest, which saves the most material and is more conducive to the transmission between the upper turntable 210 and the lower turntable 230; the connecting part 230 is matched with the outer peripheral clearance of the foundation pile 100 to avoid the connecting part 230 from contacting the outer wall of the foundation pile 100 and affecting the normal rotation of the turntable assembly 200.

[0045] Furthermore, the offshore wind power foundation anti-scour device also includes an intermediate connecting member 500, which includes a first connecting seat 510 and a second connecting seat 520. The first connecting seat 510 is installed on the periphery of the upper turntable 210, and the second connecting seat 520 is installed on the periphery of the lower turntable 220. The driving unit is installed on the second connecting seat 520 and connected to the lower turntable 220, and the anti-scour plate 400 is connected to the first connecting seat 510 and the second connecting seat 520.

[0046] In this embodiment, the intermediate connecting member 500 includes a first connecting seat 510 and a second connecting seat 520, which are respectively installed on the outer periphery of the upper turntable 210 and the lower turntable 220, and are used to connect the anti-scouring plate 400. The anti-scouring plate 400 can not only play an anti-scouring effect, but also realize the transmission connection between the upper turntable 210 and the lower turntable 220. The anti-scouring plate 400 is spaced apart from the connecting part 230, which can further improve the transmission stability between the upper turntable 210 and the lower turntable 220.

[0047] Furthermore, the length of the anti-scour plate 400 extends along the axis of the foundation pile 100. The anti-scour plate 400 extending along the axis of the foundation pile 100 has the shortest length and is perpendicular to the cross section of the foundation pile 100, which can cope with the impact of the ocean current from any side of the anti-scour plate 400 along its rotation direction, thereby improving the anti-scour effect.

[0048] Furthermore, the angle between the line connecting the anti-scour plate 400 and the center of the foundation pile 100 and the line connecting the connection portion 230 and the center of the foundation pile 100 is 180°. With this structural layout, the connection between the upper turntable 210 and the lower turntable 220 can be made more stable.

[0049] Furthermore, the anti-scouring plate 400 is a streamlined symmetrical structure, which can effectively reduce the scouring effect on the offshore wind power foundation.

[0050] Exemplarily, the anti-scour plate 400 has a first end 401 facing the foundation pile 100 and a second end 402 away from the foundation pile 100, the width of the anti-scour plate 400 extends along a first direction, that is, the direction from the first end 401 of the anti-scour plate 400 to the second end 402, the thickness of the anti-scour plate 400 extends along a second direction, the first direction, the second direction and the axial direction of the foundation pile 100 are perpendicular to each other, and the thickness of the anti-scour plate 400 first increases and then decreases in the direction from the first end 401 to the second end 402.

[0051] In this embodiment, the thickness of the anti-scour plate 400 increases first and then decreases in the direction from the first end 401 to the second end 402, that is, the anti-scour plate 400 is similar to a water drop structure, and when the sand is washed to one side of the anti-scour plate 400 along its thickness direction under the action of the ocean current, it can flow out through the second end 402 along its streamlined side. Moreover, when the driving unit drives the turntable assembly 200 to drive the anti-scour plate 400 to rotate and when the ocean current speed changes, when the sand contacts one side of the anti-scour plate 400 along its thickness direction, it will also flow out through the second end 402 along the streamlined side of the anti-scour plate 400, sweeping and filling the scour pits encountered during its rotation, thereby improving the installation stability of the foundation pile 100.

[0052] In this embodiment, the number of speed meters 300 is not less than 9, and can be 10, 11, 12, 15, 16 or more, and the specific number can be determined based on comprehensive considerations of cost and speed measurement effect, and the details will not be repeated here.

[0053] This embodiment also provides an offshore wind power foundation anti-scouring method, using an offshore wind power foundation anti-scouring device, and the offshore wind power foundation anti-scouring method includes the following steps:

[0054] S10, collecting the speeds measured by all the speed meters 300 once at set intervals, and collecting the speed data of all the speed meters 300 within a specified total time;

[0055] S20, according to the collected speed data, combined with the KMEANS method, all the speed meters 300 are divided into K areas and the area with the maximum speed is calculated, where K≥3;

[0056] S30, the control terminal controls the driving unit to drive the turntable assembly 200 to drive the anti-scouring plate 400 to rotate to the area with the maximum speed.

[0057] Among them, the set time can be 10s, 12s, 15s, etc., and the specified total time can be 8min, 10min, 12min, 15min, etc., depending on the actual situation.

[0058] In this embodiment, the KMEANS method is a conventional technical means for obtaining the maximum value region according to the sample data file.

[0059] Next, in conjunction with the offshore wind power foundation anti-scour device of the above embodiment, 16 velocimeters 300 are installed on the lower turntable 220 as an example ( Figure 3 ), the offshore wind power foundation anti-scouring method of the present invention is further described in detail.

[0060] The steps of the offshore wind power foundation anti-scouring method of this embodiment are as follows:

[0061] (1) Collect sample data (speed date): Collect the ocean current speed data measured by 16 speed meters every 10 seconds. A total of 960 speed data are collected within 10 minutes, which are recorded as: i =(χ1,χ2,χ3····χ 960 ), as the sample space.

[0062] (2) Use Gaussian function to calculate the cluster center:

[0063]

[0064] Among them, ρ i represents the local density; δ i Represents χ i The minimum distance to all samples with higher local density, χ i The distance to the nearest high-density sample.

[0065] The samples with relatively large ρ and δ values ​​are used as cluster centers, and the cluster centers can be determined by the partition function γ. The partition function γ = ρ × δ. The larger the value corresponding to the partition function γ sample, the more likely it is the cluster center. After the cluster center is determined, the samples are sorted and divided into 4 clusters. Correspondingly, K = 4, that is, 16 speed meters 300 are divided into 4 areas. The largest cluster is the maximum speed area.

[0066] (3) According to the measured maximum speed area, the control terminal controls the driving unit to drive the lower turntable 220 to drive the anti-scour plate 400 to rotate to the area corresponding to the maximum speed of the ocean current.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An offshore wind power foundation anti-scour device, characterized in that: include: Offshore wind power foundation, including a number of foundation piles arranged at intervals; A turntable mechanism, the turntable mechanism comprising a turntable assembly and a driving unit, the turntable assembly being mounted on the periphery of each foundation pile and adjacent to the bottom of the foundation pile, the driving unit being connected to the turntable assembly to drive the turntable assembly to rotate relative to the foundation pile; Speedometers, a plurality of speedometers are arranged on the outer peripheral spacer ring of each rotating disk assembly, and all the speedometers are evenly distributed; An anti-scour plate is fixed to the outer periphery of the turntable assembly and is spaced apart from the speed meter.

2. The offshore wind power foundation anti-scour device according to claim 1, characterized in that: The turntable assembly includes an upper turntable, a lower turntable and a connecting portion, the upper turntable and the lower turntable are respectively mounted on the outer periphery of the foundation pile through bearings, and the upper turntable and the lower turntable are spaced apart up and down and fixedly connected through the connecting portion, the driving portion is transmission-connected to the lower turntable, the anti-scouring plates are respectively fixedly connected to the outer peripheries of the upper turntable and the lower turntable, and the speed meter is mounted on the lower turntable.

3. The offshore wind power foundation anti-scour device according to claim 2 is characterized in that: The length of the connection portion extends along the axis of the foundation pile, and the connection portion is loosely matched with the outer periphery of the foundation pile.

4. The offshore wind power foundation anti-scour device according to claim 2, characterized in that: It also includes an intermediate connecting member, which includes a first connecting seat and a second connecting seat, the first connecting seat is installed on the outer periphery of the upper turntable, the second connecting seat is installed on the outer periphery of the lower turntable, the driving part is installed on the second connecting seat and connected to the lower turntable, and the anti-scouring plate is connected to the first connecting seat and the second connecting seat.

5. The offshore wind power foundation anti-scour device according to claim 2, characterized in that: The length of the anti-scour plate extends along the axis of the foundation pile.

6. The offshore wind power foundation anti-scour device according to claim 5, characterized in that: The angle between the line connecting the anti-scour plate and the center of the foundation pile and the line connecting the connecting portion and the center of the foundation pile is 180°.

7. The offshore wind power foundation anti-scour device according to any one of claims 1 to 6, characterized in that: The anti-scouring plate is a streamlined symmetrical structure.

8. The offshore wind power foundation anti-scour device according to claim 7, characterized in that: The anti-scour plate has a first end facing the foundation pile and a second end facing away from the foundation pile. The width of the anti-scour plate extends along a first direction, that is, the first end of the anti-scour plate is facing the second end. The thickness of the anti-scour plate extends along a second direction. The first direction, the second direction and the axial direction of the foundation pile are perpendicular to each other. The thickness of the anti-scour plate first increases and then decreases along the direction from the first end to the second end.

9. The offshore wind power foundation anti-scour device according to claim 1, characterized in that: The number of the speed meters is not less than 9.

10. A method for preventing scour of offshore wind power foundation, characterized in that: The offshore wind power foundation anti-scour device according to any one of claims 1 to 9 is applied, and the offshore wind power foundation anti-scour method comprises the following steps: S10, collecting the speeds measured by all speed meters once at set intervals, and collecting the speed data of all speed meters within a specified total time; S20, based on the collected speed data, all the speed meters are divided into K areas in combination with the KMEANS method and the area with the maximum speed is calculated, where K≥3; S30, the control terminal controls the driving unit to drive the turntable assembly to drive the anti-scour plate to rotate to the area with the highest speed.

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