Self-sinking scouring prevention device for offshore wind power pile foundation

Abstract

The self-sinking scouring prevention device for offshore wind power pile foundation comprises a sliding barrel, a scouring groove bottom plate and a scouring groove outer barrel which are symmetrically arranged in two parts and attached to the offshore wind power column; the sliding barrel comprises a scouring groove inner barrel, a sliding barrel connecting plate, a sealing plate and a pulley; the scouring groove bottom plate comprises a bottom plate, a bottom plate connecting plate and a lifting ring; the scouring groove outer barrel comprises an outer barrel and an outer barrel connecting plate; compared with the prior art, the device has the characteristics of small outer diameter for convenient installation, better protection effect and self-sinking protection device to avoid scouring failure due to the decrease of seabed surface, thereby achieving the purpose of the present application.

Description

Technical Field

[0001] This invention relates to an offshore wind power engineering device, and more particularly to a self-sinking offshore wind turbine foundation anti-scour device. Background Technology

[0002] Among active scour prevention methods, protective rings are a useful and simple local scour prevention measure for cylindrical bridge piers. By setting obstacles in the downflow channel, the intensity of horseshoe eddies is reduced. The outer diameter and installation height of the protective ring have been proven to be the most important factors affecting its protective efficiency. The scour prevention effect of the protective ring increases as the installation height decreases. When the protective ring is installed at a depth of 0.04 times the bed surface, almost no scour occurs around the protective ring. The most economical outer diameter of the protective ring is 3-3.5 times the pile diameter. However, the protective ring cannot prevent the generation of horseshoe eddies.

[0003] In engineering practice, installing large-diameter protective rings is difficult, and protective rings larger than three times the diameter of the pier are impractical. Furthermore, when sediment is transported across the entire bed surface, the protective ring may detach from the bed surface as the bed descends, exposing the bed beneath it. In such cases, the protective effect of the ring will be reduced.

[0004] Therefore, there is a particular need for a self-sinking offshore wind turbine foundation scour prevention device to solve the aforementioned existing problems. Summary of the Invention

[0005] The purpose of this invention is to provide a self-sinking offshore wind turbine foundation scour protection device, which effectively solves the problems of large volume, poor protection effect and susceptibility to bed surface subsidence of traditional protective rings, and meets the needs of actual offshore wind turbine foundation scour protection projects.

[0006] The technical problem solved by this invention can be achieved by the following technical solutions:

[0007] A self-sinking offshore wind turbine foundation scour protection device includes a sliding barrel, a scour trough bottom plate, and a scour trough outer barrel, symmetrically arranged and attached to the offshore wind turbine. The sliding barrel includes an inner scour trough barrel, a sliding barrel connecting plate, a sealing plate, and pulleys. The scour trough bottom plate includes a bottom plate, a bottom plate connecting plate, and a lifting ring. The scour trough outer barrel includes an outer barrel and an outer barrel connecting plate. The inner scour trough barrel and the outer barrel are vertically welded to the bottom plate, and a pulley is fixed to the inner side of the inner scour trough barrel. The lower edge of the sealing plate is welded and fixed to the upper edge of the inner scour trough barrel. The sliding barrel connecting plate is fixed to the inner scour trough barrel. The bottom plate connecting plate and the lifting ring are fixed to the bottom plate. The outer barrel connecting plate is fixed to the outer barrel. The sliding barrel connecting plate, the bottom plate connecting plate, and the outer barrel connecting plate are connected by bolts.

[0008] In a preferred embodiment of the present invention, the slide includes a first slide and a second slide; the sealing plate includes a first sealing plate and a second sealing plate; the flushing trough bottom plate includes a first flushing trough bottom plate and a second flushing trough bottom plate; the flushing trough outer barrel includes a first flushing trough outer barrel and a second flushing trough outer barrel; the first slide, the first sealing plate, the first flushing trough bottom plate and the first flushing trough outer barrel are respectively symmetrically arranged with the second slide, the second sealing plate, the second flushing trough bottom plate and the second flushing trough outer barrel.

[0009] In a preferred embodiment of the present invention, two symmetrically arranged sliding barrels, a bottom plate of the scour trough, and an outer barrel of the scour trough are symmetrically inserted and aligned from both sides of the offshore wind turbine column and connected to each other by bolts to form a complete anti-scour device for the self-sinking offshore wind turbine pile foundation, which improves installation efficiency and simplifies the manufacturing process of the protective device.

[0010] In a preferred embodiment of the present invention, the base plate is provided with several lifting rings to facilitate the hoisting and maintenance of the anti-erosion device.

[0011] In a preferred embodiment of the present invention, two sets of pulleys are fixed on the inner side of the inner barrel of the flushing trough. The pulleys can roll along the surface of the offshore wind turbine. The entire anti-scouring device can fall freely under its own weight and the impact force of the descending water flow, thereby ensuring that the bottom plate of the flushing trough always maintains close contact with the seabed and avoiding the failure of the anti-scouring device due to the overall drop of the seabed surface.

[0012] In a preferred embodiment of the present invention, the upper edge of the sealing plate is wrapped with rubber material to prevent the anti-erosion device from scratching the surface of the wind turbine column as it slides along the surface of the wind turbine column.

[0013] In a preferred embodiment of the present invention, the height of the outer barrel is set to 0.25 times the diameter of the offshore wind turbine column.

[0014] As a preferred embodiment of the present invention, the outer barrel can reduce the maximum downflow and the horseshoe vortex intensity is also reduced accordingly, which can effectively improve the local anti-scouring effect of offshore wind turbine pile foundation.

[0015] In a preferred embodiment of the present invention, the outer diameter of the bottom plate of the flushing trough is set to 1.25-2 times the diameter of the offshore wind turbine, while the diameter of the traditional protective plate is generally 3-4 times the diameter of the wind turbine. Although the bottom plate diameter of the flushing trough of the present invention is small, the protective effect is not reduced, and it also facilitates the hoisting and installation of the protective device.

[0016] As a preferred embodiment of the present invention, since the bottom plate of the flushing trough of the present invention has a small diameter, it is relatively easy to sink below the seabed surface. When the bottom plate of the flushing trough is below the seabed surface, the anti-scouring effect of the present invention is improved.

[0017] The self-sinking offshore wind turbine foundation scour protection device of the present invention has the advantages of small outer diameter for easy installation, better protection effect, and the ability of the protective device to sink itself to avoid scour failure due to seabed subsidence, thereby achieving the purpose of the present invention.

[0018] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of preferred embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the anti-scour device for the self-sinking offshore wind turbine pile foundation of the present invention.

[0020] Figure 2 This is a connection structure diagram of the self-sinking offshore wind turbine foundation scour prevention device of the present invention.

[0021] In the diagram: 1-Offshore wind turbine pole, 2-slide bucket, 3-bottom plate of the flushing trough, 4-outer barrel of the flushing trough, 21-inner barrel of the flushing trough, 22-slide bucket connecting plate, 23-sealing plate, 24-pulley, 31-bottom plate, 32-bottom plate connecting plate, 33-lifting ring, 41-outer barrel, 42-outer barrel connecting plate, 2a-first slide bucket, 23a-first sealing plate, 3a-bottom plate of the first flushing trough, 4a-outer barrel of the first flushing trough, 2b-second slide bucket, 23b-second sealing plate, 3b-bottom plate of the second flushing trough, 4b-outer barrel of the second flushing trough. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0023] Example

[0024] like Figure 1 and Figure 2 As shown, the self-sinking offshore wind turbine foundation scour protection device provided in this embodiment includes an offshore wind turbine 1, on which an scour protection device is installed. The scour protection device includes a sliding barrel 2, a scour trough bottom plate 3, and a scour trough outer barrel 4. The sliding barrel 2 includes a scour trough inner barrel 21, a sliding barrel connecting plate 22, a sealing plate 23, and a pulley 24; the scour trough bottom plate 3 includes a bottom plate 31, a bottom plate connecting plate 32, and a lifting ring 33; the scour trough outer barrel 4 includes an outer barrel 41 and an outer barrel connecting plate 42. The scour protection device includes two symmetrical parts: the sliding barrel 2 includes a first sliding barrel 2a and a second sliding barrel 2b; the sealing plate 23 includes a first sealing plate 23a and a second sealing plate 23b; the scour trough bottom plate 3 includes a first scour trough bottom plate 3a and a second scour trough bottom plate 3b; and the scour trough outer barrel 4 includes a first scour trough outer barrel 4a and a second scour trough outer barrel 4b.

[0025] The height of the outer barrel 41 of the flushing trough is set to 0.25 times the diameter of the wind turbine column 1. The inner barrel 21 and the outer barrel 41 are vertically welded to the base plate 31 to form a complete flushing trough. Two sets of pulleys 24 are fixed to the inner side of the inner barrel 21 of the flushing trough, and the pulleys 24 can roll along the surface of the offshore wind turbine column 1. The lower edge of the sealing plate 23 is welded and fixed to the upper edge of the inner barrel 21 of the flushing trough. The upper edge of the sealing plate 23 is covered with rubber material to prevent the anti-scouring device from scratching the surface of the offshore wind turbine column 1 during sliding. The base plate connecting plate 32 and the lifting ring 33 are fixed to the base plate 31.

[0026] The invention comprises two symmetrical parts. By bolting the connecting plates 22 on the first sliding barrel 2a, the bottom plate connecting plate 32 on the bottom plate 3a of the first scour trough, and the outer barrel connecting plate 42 on the outer barrel 4a of the first scour trough to the corresponding connecting plates on the second sliding barrel 2b, the bottom plate 3b of the second scour trough, and the outer barrel 4b of the second scour trough, the two parts of the offshore wind turbine foundation scour protection device are detachably connected. This allows the two protective blocks to be first inserted into and aligned with the offshore wind turbine column 1, and then bolted together to form a complete scour protection device. The detachable connection of the offshore wind turbine foundation scour protection device allows for installation at any time before or after wind turbine installation, optimizing the installation process. Several lifting rings 33 are provided on the bottom plate 31 to facilitate the hoisting and maintenance of the entire scour protection device.

[0027] The two sets of pulleys 24 fixed inside the inner barrel 21 of the flushing trough allow the entire anti-scouring device to fall freely under its own weight and the impact force of the descending water flow, ensuring that the bottom plate 31 of the flushing trough always maintains close contact with the seabed surface. Even if the overall seabed surface drops, the bottom plate 31 of the flushing trough will not detach from the seabed surface, ensuring that the anti-scouring effect of the flushing device will not fail due to the overall drop in the seabed surface.

[0028] The outer barrel 4 of the scour channel reduces the maximum downflow and the intensity of the horseshoe-shaped vortex, effectively improving the local scour protection of offshore wind turbine foundations. The outer diameter of the bottom plate 31 of the scour channel is set to 1.25-2 times the diameter of the offshore wind turbine column 1, while the diameter of traditional protective plates is generally 3-4 times the diameter of the offshore wind turbine column 1. Although the diameter of the bottom plate 31 of the scour channel of this invention is small, the protective effect is not reduced, and it also facilitates the hoisting and installation of the protective device. Because the bottom plate 31 of the scour channel of this invention has a small diameter, it is relatively easy to sink below the seabed. When the bottom plate 31 of the scour channel is below the seabed, the scour protection effect of this invention is better.

[0029] In use, before installation at the wind power project site, the inner barrel 21 and outer barrel 41 of the flushing trough are pre-fixed vertically to the base plate 31 by welding, the lower edge of the sealing plate 23 is fixed to the upper edge of the inner barrel 21 of the flushing trough, the upper and lower sets of pulleys 24 are fixed to the inner barrel 21 of the flushing trough, the base plate connecting plate 32 and the lifting ring 33 are fixed to the base plate 31, and the upper edge of the sealing plate 23 is wrapped with rubber material, thus completing the symmetrical assembly of the two parts of the invention to form two protective blocks. By fixing the wire rope on the crane to the lifting ring 33, the two protective blocks are hoisted around the wind turbine column 1 and aligned. Then, using bolts, the connecting plate 22 on the first sliding barrel 2a, the bottom plate connecting plate 32 on the bottom plate 3a of the first scour trough, and the outer barrel connecting plate 42 on the outer barrel 4a of the first scour trough are connected to the corresponding connecting plates on the second sliding barrel 2b, the bottom plate 3b of the second scour trough, and the outer barrel 4b of the second scour trough, respectively. This achieves a detachable connection between the two parts of the offshore wind turbine foundation anti-scour device, allowing the two protective blocks to be secured around the offshore wind turbine column 1, forming a complete anti-scour device. Under the action of gravity, the protective device slides down the surface of the offshore wind turbine column 1 to the seabed via pulley 24. Under the combined action of gravity and the descending water flow in front of the pile, the protective device of this invention can always remain in close contact with the seabed surface even when the overall seabed surface is lowered, thus ensuring that this invention always maintains a good anti-scour effect. Meanwhile, when maintenance is required later, a steel wire rope can be fixed on the lifting ring 33, and the protective device of the present invention can be lifted to the sea surface for maintenance by sliding along the surface of the offshore wind turbine column 1 through the pulley 24.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A scour prevention device for self-sinking offshore wind turbine foundation piles, characterized in that, The system comprises a symmetrically arranged sliding barrel, a scour trough bottom plate, and a scour trough outer barrel, all mounted on an offshore wind turbine. The sliding barrel includes an inner scour trough barrel, a sliding barrel connecting plate, a sealing plate, and pulleys. The scour trough bottom plate includes a bottom plate, a bottom plate connecting plate, and a lifting ring. The scour trough outer barrel includes an outer barrel and an outer barrel connecting plate. The inner and outer barrels are vertically welded to the bottom plate, and pulleys are fixed to the inner side of the inner barrel. The lower edge of the sealing plate is welded to the upper edge of the inner barrel. The sliding barrel connecting plate is fixed to the inner barrel, the bottom plate connecting plate and the lifting ring are fixed to the bottom plate, and the outer barrel connecting plate is fixed to the outer barrel. The sliding barrel connecting plate, the bottom plate connecting plate, and the outer barrel connecting plate are connected by bolts. The height of the outer barrel is set to 0.25 times the diameter of the wind turbine. The outer diameter of the bottom plate of the scour trough is set to 1.25-2 times the diameter of the offshore wind turbine.

2. The anti-scour device for self-sinking offshore wind turbine foundations according to claim 1, characterized in that, The upper edge of the sealing plate is wrapped with rubber material.

3. The anti-scour device for self-sinking offshore wind turbine foundations according to claim 1, characterized in that, The slide includes a first slide and a second slide; the sealing plate includes a first sealing plate and a second sealing plate; the flushing trough bottom plate includes a first flushing trough bottom plate and a second flushing trough bottom plate; the flushing trough outer barrel includes a first flushing trough outer barrel and a second flushing trough outer barrel; the first slide, the first sealing plate, the first flushing trough bottom plate and the first flushing trough outer barrel are respectively symmetrically arranged with the second slide, the second sealing plate, the second flushing trough bottom plate and the second flushing trough outer barrel.

4. The anti-scour device for self-sinking offshore wind turbine foundations according to claim 3, characterized in that... The connecting plate on the first sliding barrel, the connecting plate on the bottom plate of the first flushing trough, and the connecting plate on the outer barrel of the first flushing trough are respectively connected to the corresponding second sliding barrel, the bottom plate of the second flushing trough, and the connecting plate on the outer barrel of the second flushing trough by bolts.

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