Offshore wind power suction bucket foundation structure with anti-scouring ring
By designing spiral and umbrella anti-swish rings on the basis of offshore wind power suction barrels, the water flow velocity and flow direction are optimized, the problem of soil erosion in the marine environment is solved, and the anti-swish ability and stability of the suction barrel foundation is improved.
Patent Information
- Application Number
- CN202421088166.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The infrastructure of offshore wind power suction barrels is eroded by waves and currents in the marine environment, causing soil to be washed away, affecting its stability and durability. The existing protective measures are limited in effect and cannot effectively solve the erosion problem.
A suction barrel infrastructure with anti-swish rings is designed, including a spiral circular anti-swish ring arranged along the conduit frame and an umbrella anti-swish ring arranged outside the top of the suction barrel body, by optimizing its shape and arrangement , reduce the water flow velocity, change the flow direction, reduce the vortex and entrainment effect, thereby reducing the risk of erosion.
It effectively reduces the erosion of the suction barrel foundation by the water flow, improves the anti-shrinking ability, and enhances the stability and durability of the structure.
Smart Images
Figure CN222206456U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of offshore wind turbine foundations, and relates to an offshore wind turbine suction bucket foundation structure, in particular to an offshore wind turbine suction bucket foundation structure with an anti-scouring ring. Background Art
[0002] At present, suction bucket foundation, as one of the main supporting structures for offshore wind power generation, has been widely used and continuously developed around the world. Its advantage is that compared with traditional foundation structures, suction bucket foundation does not require fixation in deep water areas, can adapt to more sea conditions, and has better wind load resistance. With the rapid development of the offshore wind power industry, the design and manufacturing technology of suction bucket foundations are also constantly improving, and a series of new materials and processes have emerged to improve its stability and reliability while reducing costs. Against the background of continuous innovation in wind power generation technology, the development prospects of suction bucket foundations are very broad.
[0003] The existence of marine foundations will change the initial flow field structure of the foundation neighborhood in the marine environment: the obstruction of the foundation causes streamline contraction, the upper water surface in front of the foundation rises slightly to form stagnant water, and the lower water flows downward to form a downward water flow; a horseshoe-shaped vortex is formed in front of the foundation, and a wake vortex is formed behind the foundation, that is, turbulence is generated around the foundation; the foundation is accompanied by wave reflection, diffraction and wave breaking; under the action of vortex and turbulence, the near-bottom flow velocity of the foundation increases, which leads to a decrease in the upper pressure at the seabed mud water surface and an unchanged lower pressure, a pressure difference is generated on the upper and lower sides of the seabed soil, inducing soil liquefaction, and then the seabed soil is lost under the action of water flow, causing scouring.
[0004] Although suction bucket foundations have shown great potential in the field of offshore wind power, the scouring problem of the surrounding soil is still a difficult problem that deserves attention and solution.
[0005] Waves, currents and other factors in the marine environment will continuously erode the soil surface around the suction bucket foundation, affecting its stability and durability. Traditional protective measures often have limited effects and cannot solve or improve the scouring problem. Therefore, more effective technical means are urgently needed to improve the anti-scouring ability of the suction bucket foundation. Utility Model Content
[0006] In order to solve or improve the scouring problem of an offshore wind power suction bucket foundation structure, the utility model proposes an offshore wind power suction bucket foundation structure with an anti-scouring ring.
[0007] An offshore wind power suction bucket foundation structure with an anti-scour ring comprises: a suction bucket foundation and an anti-scour ring, wherein the suction bucket foundation comprises a suction bucket body 3 located at the bottom and a conductor frame 1 located at the top, and a plurality of reinforcing ribs 2 arranged in an array are provided at the connection between the suction bucket body 3 and the conductor frame 1; the anti-scour ring comprises a circular anti-scour ring 4 arranged in a spiral shape along the conductor frame 1 and an umbrella-shaped anti-scour ring 5 arranged axially along the outer side of the top of the suction bucket body 3.
[0008] Optimized: The exposed length of the circular anti-scour ring 4 in the horizontal direction is 0.125 times the diameter of the jacket frame 1 , and the thickness is 0.085 times the diameter of the jacket frame 1 .
[0009] Optimized: The circular anti-scour rings 4 are arranged at equal intervals, and the interval between the circular anti-scour rings 4 is 7 times the exposed length of the circular rings exposed from the jacket 1.
[0010] Optimized: The circular anti-scour ring 4 is arranged in a spiral parallel manner, and the angle between the circular anti-scour ring 4 and the horizontal plane is the underwater repose angle of the clay.
[0011] Optimized: An isosceles right triangle protrusion is arranged on the edge of the circular anti-scour ring 4, and the length of the right angle side of the isosceles right triangle is 0.5 times the thickness of the circular ring.
[0012] Optimized: The thickness of the umbrella-shaped anti-scour ring 5 is 0.03 times the diameter of the suction barrel body 3.
[0013] Optimized: The angle between the umbrella-shaped anti-scour ring 5 and the horizontal plane is the underwater repose angle of clay.
[0014] Optimized: The horizontal dimension of the umbrella-shaped anti-scour ring 5 is 0.5 times the diameter of the suction barrel body 3 .
[0015] Optimized: The umbrella-shaped anti-scour ring 5 is axially symmetrical on the cross section of the center line of the suction barrel body 3.
[0016] Optimized: The centroids of the circular anti-scour ring 4 and the umbrella-shaped anti-scour ring 5 are collinear with the centroid of the jacket 1 .
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The utility model evenly distributes circular anti-scour rings 4 and umbrella-shaped anti-scour rings 5 on the conductor frame 1. The circular anti-scour rings 4 can effectively reduce the speed of the water flow in the vertical direction of the bridge pier and guide part of the water flow to a position away from the foundation. The umbrella-shaped anti-scour rings 5 can block the vertical water flow weakened by the evenly distributed circular rings and the horizontal water flow close to the seabed, further weaken the water flow velocity and change its flow direction, thereby reducing the vortex generated by the water flow and weakening the entrainment effect of the horizontal water flow, reducing the occurrence of local scour. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] Figure 1 It is a three-dimensional diagram showing the structure of the utility model;
[0021] Figure 2 It is a schematic cross-sectional structure diagram of the circular anti-scour ring 4 of the utility model;
[0022] Figure 3 yes Figure 2 The enlarged structural diagram at a in the middle;
[0023] Figure 4 It is a schematic cross-sectional structure diagram of the umbrella-shaped anti-scour ring 5 of the utility model.
[0024] Legend: conductor frame 1; reinforcing rib 2; suction barrel body 3; circular anti-scour ring 4; umbrella-shaped anti-scour ring 5. DETAILED DESCRIPTION
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] An offshore wind power suction bucket foundation structure with an anti-scour ring comprises a conductor pipe frame 1, reinforcement ribs 2, a suction bucket body 3, a circular anti-scour ring 4 and an umbrella-shaped anti-scour ring 5. Most of the suction bucket body 3 is buried in the soil, leaving only 0.5m exposed in the water. The top of the suction bucket body 3 is equipped with reinforcement ribs 2, and the conductor pipe frame 1 is placed at the center of the top of the suction bucket body 3. The three constitute the main structure of the suction bucket foundation, and the upper part of the conductor pipe frame 1 is equipped with an offshore wind turbine.
[0027] The circular anti-scour ring 4 is arranged outside the conductor frame 1 , that is, the anti-scour ring is installed on the conductor frame 1 and arranged longitudinally along the conductor frame 1 .
[0028] The circular anti-scour ring 4 should be close to the suction barrel body 3 in vertical distance, that is, the bottom anti-scour ring should be close to the top of the reinforcing rib 2.
[0029] A smaller protruding length will be less susceptible to the impact of debris in the water, that is, the exposed length of the anti-scour ring should not be too large, and the exposed length of the anti-scour ring exposed from the jacket 1 should not exceed 0.125 times the diameter of the jacket 1. In this embodiment, the diameter of the jacket 1 is 2.5m, and the exposed length is 0.3125m.
[0030] The greater the ratio of the thickness of the circular anti-scour ring 4 to the diameter of the pipe frame 1, the more severe the scour will be. In other words, the thickness should be as small as possible and should not exceed 0.085 times the diameter of the pipe frame 1. The thickness of the anti-scour ring in this embodiment is 0.2125m.
[0031] The distances between adjacent anti-scour rings are equal, that is, the anti-scour rings are distributed at equal distances, and the distance between two adjacent anti-scour rings is preferably 7 times the size of the exposed jacket frame 1, which is 2.1875 m in this embodiment.
[0032] The number of circular anti-scour rings 4 should not be too small. In some examples, three are installed. The combination of multiple circular spoiler rings makes the vertical water jet generated by the blocking of the pipe frame 1 blocked in the vertical direction, thereby weakening the speed of the vertical water jet, thereby reducing the vortex formed by it and reducing scour. In this embodiment, six are used.
[0033] The circular anti-scour rings 4 are parallel to each other, that is, the anti-scour rings are at the same angle with the horizontal plane, which is the underwater repose angle of clay. The angle between the anti-scour rings and the horizontal plane will cause part of the water flow to move away from the suction bucket foundation along this angle, weakening the water flow intensity acting on the soil around the bucket.
[0034] The top surface of the circular anti-scour ring 4 should face the flow, so as to better reduce unnecessary obstruction of the back surface to the water flow and better play a role in weakening the descending water flow.
[0035] The edge of the circular anti-scour ring 4 is provided with an isosceles right-angled triangle protrusion. When the edge is angled, the vertical resistance to the flow is the largest. The sharp corner will more effectively cause the flow separation of the water flow.
[0036] The umbrella-shaped anti-scour ring 5 is connected to the side of the barrel. Its cross-sectional shape is like an umbrella and its performance is also similar to that of an umbrella. It can block the vertical water flow weakened by the circular anti-scour ring 4 on the upper part and the horizontal water flow close to the seabed.
[0037] The width of the umbrella-shaped anti-scour ring 5 should not be too large, otherwise it will increase the water resistance when the suction barrel is sunk. The total length of the umbrella-shaped anti-scour ring 5 extending out of the suction barrel is 0.5 times the diameter of the barrel body. In this embodiment, the barrel body diameter is 12m, and the depth of the umbrella-shaped anti-scour ring 5 is 6m.
[0038] The umbrella-shaped anti-scour ring 5 is welded on the side of the barrel, and the bottom edge is on the pre-buried mud surface, which can ensure the protection of the soil on the side of the barrel to the greatest extent.
[0039] The umbrella-shaped anti-scour ring 5 is symmetrical along the central axis in cross section. As mentioned above, the bottom edge of the scour ring is embedded in the pre-buried mud surface, so the inner and outer parts and the mud surface form a closed space.
[0040] The angle between the umbrella-shaped anti-scour ring 5 and the horizontal plane should take into account the shape of the scour pit formed by water scouring, that is, the angle between the two should conform to the underwater repose angle of the clay. When the vertical water flow reaches the inner side of the umbrella-shaped anti-scour ring 5, it will flow along the umbrella-shaped anti-scour ring 5 according to the original angle, that is, the underwater repose angle of the clay, reducing the scouring of the surrounding soil. The outermost part is mainly used to block the horizontal water flow to avoid the entrainment effect on the soil around the barrel.
[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0042] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. An offshore wind power suction bucket foundation structure with an anti-scouring ring, characterized in that: It includes a suction bucket foundation and an anti-scour ring; wherein: The suction bucket foundation comprises a suction bucket body (3) located at the bottom and a guide tube frame (1) located at the top, and a plurality of reinforcing ribs (2) arranged in an array are provided at the connection between the suction bucket body (3) and the guide tube frame (1); The anti-scour ring comprises a circular anti-scour ring (4) arranged in a spiral shape along the catheter frame (1) and an umbrella-shaped anti-scour ring (5) arranged axially along the outer side of the top of the suction barrel body (3).
2. The offshore wind power suction bucket foundation structure with an anti-scouring ring according to claim 1 is characterized in that: The exposed length of the circular anti-scour ring (4) in the horizontal direction is 0.125 times the diameter of the catheter frame (1), and the thickness is 0.085 times the diameter of the catheter frame (1).
3. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: The circular anti-scour rings (4) are arranged at equal intervals, and the spacing between the circular anti-scour rings (4) is 7 times the exposed length of the circular rings exposed from the catheter frame (1).
4. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: The circular anti-scour ring (4) is arranged in a spiral parallel manner, and the angle between the circular anti-scour ring (4) and the horizontal plane is the underwater angle of repose of the clay.
5. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: An isosceles right-angled triangle protrusion is arranged on the edge of the circular anti-scour ring (4), and the length of the right-angled side of the isosceles right-angled triangle is 0.5 times the thickness of the circular ring.
6. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: The thickness of the umbrella-shaped anti-scour ring (5) is 0.03 times the diameter of the suction barrel body (3).
7. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: The angle between the umbrella-shaped anti-scour ring (5) and the horizontal plane is the underwater angle of repose of the clay.
8. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1 is characterized in that: The horizontal dimension of the umbrella-shaped anti-scour ring (5) is 0.5 times the diameter of the suction barrel body (3).
9. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1, characterized in that: The umbrella-shaped anti-scour ring (5) is axisymmetric on the cross section of the center line of the suction barrel body (3).
10. The offshore wind power suction bucket foundation structure with an anti-scour ring according to claim 1, characterized in that: The centroids of the circular anti-scour ring (4) and the umbrella-shaped anti-scour ring (5) are collinear with the centroid of the catheter frame (1).