Anti-scouring device for offshore wind power single pile foundation

Abstract

The utility model discloses an anti-scouring device for an offshore wind power single pile foundation. The anti-scouring device comprises a sleeve, a foldable anti-scouring framework and bionic grass, the sleeve is arranged outside a to-be-protected single pile foundation in a sleeving mode, and the foldable anti-scour framework is connected to the sleeve. The bionic grass is fixed on the foldable anti-scouring framework; the sleeve comprises an upper sleeve and a lower sleeve, and the foldable anti-scouring framework comprises a V-shaped foldable framework and a supporting strip; the tail end of one framework edge of the V-shaped foldable framework is connected with the upper sleeve, and the connecting point of the two framework edges of the V-shaped foldable framework is connected with the lower sleeve through the supporting strip; when the upper sleeve and the lower sleeve are close to each other, the foldable anti-scouring framework can be unfolded. A foldable and expandable structure is adopted, installation is facilitated, protection stability is maintained, bionic grass is laid outside the anti-scouring framework, vortexes around the foundation are reduced, the flow speed of water flow around the foundation is reduced, and impact of the water flow on the single-pile foundation is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power engineering, and in particular to an offshore wind power single pile foundation anti-scouring device. Background Art

[0002] With the rapid development of wind power technology and the saturation of installed capacity of onshore wind turbines, the development of wind power has gradually shifted to offshore wind power with more abundant wind resources. For offshore wind turbines, the reliability of the wind turbine foundation is of paramount importance due to the influence of the offshore environment.

[0003] The foundation structures of offshore wind turbines are divided into the following types: pile-supported foundation, gravity foundation, floating foundation and suction foundation. The pile-supported foundation is further divided into single pile foundation, multi-pile foundation and conductor pipe. Among these foundation structures, the single pile foundation is widely used in offshore wind power projects because of its simple structure, clear force, simple construction and construction process, short construction period and good economy.

[0004] Compared with land-based wind turbine foundations, offshore wind turbine monopile foundations need to withstand more loads, such as waves, currents, collisions with ice-loaded barges and other environmental factors. The hydrodynamic effects of waves and currents on the seabed will form vortices around the monopile foundation, causing the loss of seabed soil and gravel around the monopile foundation, thereby forming scour pits around the monopile foundation. The existence of scour pits will reduce the effective burial depth of the foundation and affect its bearing capacity. It will also change the natural frequency of the structure, which may cause resonance of the foundation structure and affect the stability of the structure. If the water flow scours for a long time, it will cause serious corrosion to the outside of the monopile foundation, affecting its service life and safety. Utility Model Content

[0005] The utility model aims to provide an offshore wind power monopile foundation anti-scouring device to overcome the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] An offshore wind power monopile foundation anti-scour device comprises a sleeve, a foldable anti-scour frame and bionic grass; the sleeve is sleeved outside the monopile foundation to be protected, the foldable anti-scour frame is connected to the sleeve; the bionic grass is fixed on the foldable anti-scour frame;

[0008] The sleeve includes an upper sleeve and a lower sleeve, and the foldable anti-scour frame includes a V-shaped foldable frame and a support bar; the end of one frame edge of the V-shaped foldable frame is connected to the upper sleeve, and the support bar connects the two frame edge connection points of the V-shaped foldable frame to the lower sleeve; when the upper sleeve and the lower sleeve are close to each other, the foldable anti-scour frame can be expanded.

[0009] To optimize the above technical solutions, the specific measures taken also include:

[0010] A first connecting ring is provided at the upper end of the upper sleeve, and the upper sleeve is connected to the V-shaped foldable frame via the first connecting ring.

[0011] A second connecting ring is provided at the lower end of the lower sleeve, and the lower sleeve is connected to the supporting bar via the second connecting ring.

[0012] The foldable anti-scour skeleton is divided into several groups, and correspondingly, the support bars are also divided into several groups.

[0013] As a preferred solution, the foldable anti-scour frame and the support bars are evenly arranged on the upper sleeve and the lower sleeve respectively.

[0014] Furthermore, two frame edges of the V-shaped foldable frame and the V-shaped foldable frame and the support bars are connected by rivets respectively.

[0015] Furthermore, adjacent foldable anti-scour frames are connected by connecting lines or connecting ropes.

[0016] As a preferred solution, the bionic grass is tied to a foldable anti-scour frame.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The anti-scour frame of the offshore wind power single pile foundation anti-scour device of the utility model is designed as an expandable structure, which is convenient for installation and maintenance of the stability of protection; when the frame of the anti-scour device is fully opened and the lower end of the frame is in contact with and fixed to the seabed, the two connecting rings and the sleeve are fixed on the single pile foundation, thereby effectively preventing the anti-scour device from sinking and rotating due to factors such as currents and waves, so that the anti-scour device forms a stable structure.

[0019] The utility model lays bionic grass outside the anti-scour frame, reduces the occurrence of vortices around the foundation and reduces the flow rate of water around the foundation, thereby slowing down the impact of water flow on the single pile foundation, forming a strong protection for the single pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation of the offshore wind power monopile foundation anti-scour device of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the offshore wind power single pile foundation anti-scour device of the utility model.

[0022] The accompanying drawings are marked as follows: 1. single pile foundation; 2. sea level; 3. foldable anti-scour frame; 4. bionic grass; 5. seabed; 6. support bar; 7. V-shaped foldable frame; 8. rivet; 9. first connecting ring; 10. second connecting ring; 11. upper sleeve; 12. lower sleeve. DETAILED DESCRIPTION

[0023] The above contents of the utility model are further described in detail below in the form of embodiments, but this should not be understood as the scope of the above subject matter of the utility model is limited to the following embodiments. All technologies realized based on the above contents of the utility model belong to the scope of the utility model.

[0024] The utility model provides an anti-scouring device for an offshore wind power single pile foundation 1, such as Figure 1 , 2 As shown, it includes a sleeve, a foldable anti-scour frame 3 and bionic grass 4; the sleeve is sleeved outside the single pile foundation 1 to be protected, and the foldable anti-scour frame 3 is connected to the sleeve; the bionic grass 4 is fixed on the foldable anti-scour frame 3;

[0025] like Figure 2 As shown, the sleeve includes an upper sleeve 11 and a lower sleeve 12, and the foldable anti-scour frame 3 includes a V-shaped foldable frame 7 and a support bar 6; the end of one frame edge of the V-shaped foldable frame 7 is connected to the upper sleeve 11, and the support bar 6 connects the two frame edge connection points of the V-shaped foldable frame 7 with the lower sleeve 12; when the upper sleeve 11 and the lower sleeve 12 are close to each other, the foldable anti-scour frame 3 can be opened.

[0026] The anti-scour device draws on the structural principle of an umbrella, and designs the anti-scour frame to be a foldable and expandable structure, which is easy to install and protect stability. After the anti-scour frame is opened, it is installed below sea level 2.

[0027] The upper end of the upper sleeve 11 is provided with a first connecting ring 9, and the upper sleeve 11 is connected to the V-shaped foldable frame 7 through the first connecting ring 9. The lower end of the lower sleeve 12 is provided with a second connecting ring 10, and the lower sleeve 12 is connected to the support bar 6 through the second connecting ring 10.

[0028] In the embodiment, the inner diameters of the first connecting ring 9 and the second connecting ring 10, the upper sleeve 11 and the lower sleeve 12 are slightly larger than the outer diameter of the single pile foundation 1, and are all installed outside the single pile foundation 1 in a sleeve manner. After the positions of the upper sleeves 11 and the lower sleeves 11 are fixed, the first connecting ring 9 and the second connecting ring 10 respectively connected thereto are welded to the single pile foundation 1 to achieve position locking.

[0029] The foldable anti-scour skeleton 3 is divided into several groups, and correspondingly, the support bars 6 are also divided into several groups. In a disclosed preferred embodiment, the foldable anti-scour skeleton 3 and the support bars 6 are evenly arranged on the upper sleeve 11 and the lower sleeve 12 respectively.

[0030] In a disclosed preferred embodiment, eight V-shaped foldable frames 7 are equidistantly arranged around the first connecting ring 9 at the upper end of the upper sleeve 11, and eight support bars 6 are equidistantly arranged around the second connecting ring 10 at the lower end of the lower sleeve 12. Each group of V-shaped foldable frames 7 is connected to the support bars 6 in a one-to-one correspondence, thereby forming a stable support structure around the offshore wind power monopile foundation 1.

[0031] like Figure 2 As shown, the first connecting ring 9 and the second connecting ring 10 are also provided with a plurality of connecting points for installing the foldable anti-scour frame 3 and the support bar 6. The connecting points on the first connecting ring 9 and the second connecting ring 10 are rotatably connected to the foldable anti-scour frame 3 and the support bar 6, respectively. By setting a limiting structure, after the foldable anti-scour frame 3 is opened and installed, the rotation connection has reached the maximum extent, and the foldable anti-scour frame 3 will not continue to rotate after being installed and fixed on the single pile foundation 1.

[0032] The two sides of the V-shaped foldable frame 7 are connected by rivets 8 or other node connectors. The one-to-one connection between the V-shaped foldable frame 7 and the support bar 6 can also be connected by rivets 8 or other replaceable node connectors. Through the above design, the V-shaped foldable frame 7 and the support bar 6 form a deformable joint structure.

[0033] In a disclosed preferred embodiment, adjacent foldable anti-scour frames 3 are connected by connecting lines or connecting ropes, so that each group of foldable anti-scour frames 3 and the support bar 6 form an integrated structure to enhance the anti-scour stability.

[0034] In a disclosed preferred embodiment, the bionic grass 4 is tied to the foldable anti-scour frame 3 .

[0035] When the utility model is used, the foldable anti-scour frame 3 is fixed to the single pile foundation 1 to be protected by the first connecting ring 9 and the second connecting ring 10, the upper sleeve 11 and the lower sleeve 12. The specific method is as follows:

[0036] like Figure 1As shown, the foldable anti-scour skeleton 3 is sleeved on the single pile foundation 1 through the first connecting ring 9 and the second connecting ring 10, the upper sleeve 11 and the lower sleeve 12. After the lower sleeve 12 and the second connecting ring 10 are positioned, the second connecting ring 10 is welded to the single pile foundation 1 to lock and fix the lower sleeve 12, and then the first connecting ring 9 and the upper sleeve 11 are slid downward to make each foldable anti-scour skeleton 3 fully open, and the lower end of the foldable anti-scour skeleton 3 is contacted and fixed on the seabed 5. After positioning, the first connecting ring 9 is welded to the single pile foundation 1 to lock and fix the upper sleeve 11; the bionic grass 4 is laid and tied to each skeleton of the foldable anti-scour skeleton 3 to reduce the occurrence of vortices around the foundation and reduce the flow rate of the water flow around the foundation, thereby slowing down the impact of the water flow on the single pile foundation 1, and finally forming a stable overall protective structure.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention and based on the technical essence of the present invention, may make any simple modifications, equivalent replacements and improvements to the above embodiments, which shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An offshore wind power monopile foundation anti-scour device, characterized by: It comprises a sleeve, a foldable anti-scour frame and bionic grass; the sleeve is sleeved outside the single pile foundation to be protected, the foldable anti-scour frame is connected to the sleeve; the bionic grass is fixed on the foldable anti-scour frame; The sleeve includes an upper sleeve and a lower sleeve, and the foldable anti-scour frame includes a V-shaped foldable frame and a support bar; the end of one frame edge of the V-shaped foldable frame is connected to the upper sleeve, and the support bar connects the two frame edge connection points of the V-shaped foldable frame to the lower sleeve; when the upper sleeve and the lower sleeve are close to each other, the foldable anti-scour frame can be expanded.

2. The offshore wind power monopile foundation anti-scour device according to claim 1, characterized in that: A first connecting ring is provided at the upper end of the upper sleeve, and the upper sleeve is connected to the V-shaped foldable frame via the first connecting ring.

3. The offshore wind power monopile foundation anti-scour device according to claim 1 is characterized by: A second connecting ring is provided at the lower end of the lower sleeve, and the lower sleeve is connected to the supporting bar via the second connecting ring.

4. The offshore wind power monopile foundation anti-scour device according to claim 1, characterized in that: The foldable anti-scour skeleton is divided into several groups, and correspondingly, the support bars are also divided into several groups.

5. The offshore wind power monopile foundation anti-scour device according to claim 4 is characterized in that: The foldable anti-scour frame and the support strips are respectively and evenly arranged on the upper sleeve and the lower sleeve.

6. The offshore wind power monopile foundation anti-scour device according to claim 1, characterized in that: The two frame edges of the V-shaped foldable frame and the V-shaped foldable frame and the supporting bars are connected respectively by rivets.

7. The offshore wind power monopile foundation anti-scour device according to claim 4, characterized in that: Adjacent foldable anti-scour frames are connected by connecting lines or connecting ropes.

8. The offshore wind power monopile foundation anti-scour device according to claim 1, characterized in that: The bionic grass is tied to a foldable anti-scour frame.

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