阅读说明：本技术 海上风电吸力式基础 (Offshore wind power suction type foundation ) 是由 马文冠 邱旭 刘鑫 冷鹏 杨晓东 路建林 于 2021-09-16 设计创作，主要内容包括：本发明提出了一种海上风电吸力式基础,包括基座、若干吸力筒和立柱。吸力筒安装在基座的底端并从基座向下延伸,若干吸力筒彼此套设且彼此具有间隔,内侧的吸力筒的底端位于外侧的吸力筒的底端的下方,吸力筒埋入海床中,基座的顶端从海床中露出。立柱的底部与基座的顶端相连。若干吸力筒协同承载,增加了海上风电吸力式基础的整体承载能力。本发明提出的海上风电吸力式基础具有优异的承载能力、稳固性能,还具有成本低、施工难度低等优点。(The invention provides an offshore wind power suction type foundation which comprises a base, a plurality of suction cylinders and stand columns. The suction tube is installed at the bottom end of the base and extends downwards from the base, the suction tubes are sleeved with one another and have intervals, the bottom end of the suction tube on the inner side is located below the bottom end of the suction tube on the outer side, the suction tube is buried in a seabed, and the top end of the base is exposed out of the seabed. The bottom of the upright post is connected with the top end of the base. The plurality of suction cylinders are cooperatively used for bearing, so that the integral bearing capacity of the offshore wind power suction foundation is improved. The offshore wind power suction foundation provided by the invention has excellent bearing capacity and stability, and also has the advantages of low cost, low construction difficulty and the like.)

1. An offshore wind power suction foundation, comprising:

a base;

the suction cylinders are installed at the bottom end of the base and extend downwards from the base, the suction cylinders are sleeved with one another and have intervals, the bottom end of the suction cylinder at the inner side is located below the bottom end of the suction cylinder at the outer side, the suction cylinders are buried in the seabed, and the top end of the base is exposed out of the seabed;

the bottom of the upright post is connected with the top end of the base.

2. The offshore wind power suction foundation of claim 1, wherein the base is of a plate-like structure and extends along a surface of a sea bed, and a height of the inner suction tube in a vertical direction is greater than a height of the outer suction tube in the vertical direction.

3. Offshore wind power suction foundation according to claim 2, wherein the height of the innermost suction cylinder is 4-8 times its outer diameter.

4. An offshore wind power suction foundation according to claim 2 or 3, wherein the ratio of the heights of two adjacent suction cylinders is 2-6.

5. The offshore wind power suction foundation of claim 1, wherein the suction cylinders are cylinders, and the central axes of the suction cylinders coincide.

6. The offshore wind power suction foundation of claim 5, wherein the outermost suction cylinders have an outer diameter 2-4 times the outer diameter of the innermost suction cylinders.

7. An offshore wind power suction foundation according to claim 5 or 6, wherein the ratio of the outer diameters of two adjacent suction cylinders is 1.5-3.

8. The offshore wind power suction foundation of claim 1, further comprising a partition plate disposed between two adjacent suction cylinders to divide a space between the two adjacent suction cylinders into a plurality of compartments.

9. The offshore wind power suction foundation of claim 1, wherein the cross section of the suction tube has an elliptical outer peripheral profile, the offshore wind power suction foundation comprises a fan mounted on the top end of the column, the fan comprises an impeller, and the extension direction of the rotation center line of the impeller is the same as the extension direction of the major axis of the ellipse.

10. The offshore wind power suction foundation of claim 9, wherein the cross-sectional outer circumferential profile of the column is elliptical, and the long axis of the cross-sectional outer circumferential profile of the column extends in the same direction as the rotation center line of the impeller.

Technical Field

The application relates to the technical field of offshore wind power, in particular to a suction type foundation of offshore wind power.

Background

Wind energy is increasingly regarded by human beings as a clean and harmless renewable energy source. Compared with land wind energy, offshore wind energy resources not only have higher wind speed, but also are far away from a coastline, are not influenced by a noise limit value, and allow the unit to be manufactured in a larger scale.

The offshore wind power foundation is the key point for supporting the whole offshore wind power machine, the cost accounts for 20-25% of the investment of the whole offshore wind power, and most accidents of offshore wind power generators are caused by unstable pile foundation. For the stability of the high pile foundation, the conventional method is to increase the depth of the pile foundation embedded into the seabed and increase the diameter of the pile foundation, but the problems of increasing the difficulty of transportation and construction, increasing the pile driving cost and the like are caused.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides an offshore wind power suction type foundation which has the advantages of high stability and low cost.

According to the embodiment of the invention, the offshore wind power suction foundation comprises: a base; the suction cylinders are installed at the bottom end of the base and extend downwards from the base, the suction cylinders are sleeved with one another and have intervals, the bottom end of the suction cylinder at the inner side is located below the bottom end of the suction cylinder at the outer side, the suction cylinders are buried in the seabed, and the top end of the base is exposed out of the seabed; the bottom of the upright post is connected with the top end of the base.

According to the embodiment of the invention, the offshore wind power suction foundation comprises a plurality of suction cylinders which are sequentially sleeved from inside to outside, and the plurality of suction cylinders are cooperatively used for bearing, so that the integral bearing capacity of the offshore wind power suction foundation is increased. Under the condition of the same bearing performance, compared with a single-pile foundation, the offshore wind power suction foundation provided by the embodiment of the invention has a shallower depth of the buried seabed, and the time and economic cost of offshore construction are reduced. Under the condition of the same bearing performance, compared with an offshore wind power foundation with only one suction tube in the related technology, the offshore wind power suction foundation provided by the embodiment of the invention has smaller size, and the transportation and construction difficulty is reduced.

Therefore, the offshore wind power suction foundation provided by the embodiment of the invention has excellent bearing capacity and stability, and also has the advantages of low cost, low construction difficulty and the like.

In some embodiments, the base is a plate-shaped structure and extends along the surface of the sea bed, and the height of the inner suction tube in the vertical direction is greater than that of the outer suction tube in the vertical direction.

In some embodiments, the height of the innermost suction tube is 4-8 times its outer diameter.

In some embodiments, the ratio of the heights of two adjacent suction cartridges is 2-6.

In some embodiments, the suction tube is a cylinder, and the central axes of several suction tubes coincide.

In some embodiments, the outermost suction canister has an outer diameter 2-4 times the outer diameter of the innermost suction canister.

In some embodiments, the ratio of the outer diameters of two adjacent suction cartridges is 1.5 to 3.

In some embodiments, the offshore wind power suction foundation further comprises a partition plate, the partition plate is arranged between two adjacent suction cylinders, and the space between the two adjacent suction cylinders is divided into a plurality of cabins.

In some embodiments, the outer peripheral profile of the cross section of the suction tube is an ellipse, the offshore wind power suction foundation comprises a fan, the fan is mounted at the top end of the upright post, the fan comprises an impeller, and the extension direction of the rotation center line of the impeller is the same as the extension direction of the long axis of the ellipse.

In some embodiments, the outer circumferential profile of the cross section of the pillar is elliptical, and a major axis of the outer circumferential profile of the cross section of the pillar extends in the same direction as a rotational center line of the impeller.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an offshore wind power suction foundation according to an embodiment of the invention.

Fig. 2 is a bottom view of an offshore wind power suction foundation according to an embodiment of the invention.

Reference numerals:

the suction device comprises a base 10, a suction cylinder 20, a first suction cylinder 21, a second suction cylinder 22, a third suction cylinder 23, a first partition plate 24, a second partition plate 25, a first cabin 26 and a second cabin 27.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An offshore wind power suction foundation according to an embodiment of the invention is described below with reference to fig. 1. As shown in fig. 1, the offshore wind power suction foundation includes a base 10, a plurality of suction cylinders 20, and a column (not shown).

A suction cylinder 20 is mounted at the bottom end of the base 10, the suction cylinder 20 extending downward from the connection with the base 10. The plurality of suction cylinders 20 are sleeved with each other with a space therebetween, and the bottom end of the suction cylinder 20 at the inner side is located below the bottom end of the suction cylinder 20 at the outer side. That is, the bottom ends of the plurality of suction cylinders 20 are sequentially lowered from the outside to the inside, and the bottom ends of the plurality of suction cylinders 20 are arranged in a stepped shape. The suction canister 20 is buried in the seabed and the top end of the base 10 is exposed from the seabed. The bottom of the post is connected to the top end of the base 10 and extends upwardly from the connection to the base 10. The upright column is positioned above the surface of the sea bed, and the suction tube 20 is positioned below the surface of the sea bed.

Since the bottom end of the suction tube 20 positioned at the inner side is positioned below the bottom end of the suction tube 20 positioned at the outer side, when the offshore wind power suction foundation of the embodiment of the invention sinks, the bottom of the innermost suction tube 20 is firstly contacted and sunk into the seabed, and as the offshore wind power suction foundation gradually sinks, the plurality of suction tubes 20 are sequentially contacted and sunk into the seabed from inside to outside. When the offshore wind power suction type foundation sinks to the lowest position, the bottom of the base 10 is abutted against the surface of the seabed, and the top end of the base 10 is exposed out of the seabed. It will be appreciated that the size of the suction canister 20 on the inside is smaller than the size of the suction canister 20 on the outside.

According to the embodiment of the invention, the offshore wind power suction foundation comprises a plurality of suction cylinders which are sequentially sleeved from inside to outside, and the plurality of suction cylinders are cooperatively used for bearing, so that the integral bearing capacity of the offshore wind power suction foundation is increased. Under the condition of the same bearing performance, compared with a single-pile foundation, the offshore wind power suction foundation provided by the embodiment of the invention has a shallower depth of the buried seabed, and the time and economic cost of offshore construction are reduced. Under the condition of the same bearing performance, compared with an offshore wind power foundation with only one suction tube in the related technology, the offshore wind power suction foundation provided by the embodiment of the invention has smaller size, and the transportation and construction difficulty is reduced.

Therefore, the offshore wind power suction foundation provided by the embodiment of the invention has excellent bearing capacity and stability, and also has the advantages of low cost, low construction difficulty and the like.

An embodiment of the present invention is described in detail below by taking fig. 1 as an example.

As shown in fig. 1, the base 10 has a plate-like structure and extends along the surface of the sea floor, and the height of the inner suction tube 20 in the vertical direction is greater than the height of the outer suction tube 20 in the vertical direction.

Specifically, in the embodiment shown in fig. 1, the offshore wind power suction foundation includes three suction cylinders 20, and the suction cylinders 20 are all cylinders and have coinciding central axes. The three suction cartridges 20 are a first suction cartridge 21, a second suction cartridge 22, and a third suction cartridge 23, respectively. The first suction tube 21 is sleeved on the second suction tube 22, and the second suction tube 22 is sleeved on the third suction tube 23. That is, the first suction cylinder 21 is located at the innermost side, the third suction cylinder 23 is located at the outermost side, and the second suction cylinder 22 is located between the first suction cylinder 21 and the second suction cylinder 23 in the radial direction of the first suction cylinder 21.

The pedestal 10 is circular, the diameter of the pedestal 10 is the same as the outer diameter of the third suction barrel 23, and the central axis of the pedestal 10 coincides with the central axis of the third suction barrel 23, so that the structure is more reasonable. The top ends of the first suction cylinder 21, the second suction cylinder 22 and the third suction cylinder 23 are connected to the bottom surface of the base 10 and extend downward from the bottom surface of the base 10. Since the base 10 has a plate-like structure and extends along the surface of the sea bed, it can be considered that the top ends of the first suction tube 21, the second suction tube 22 and the third suction tube 23 are located on the same horizontal plane.

In some embodiments, the central axis of the upright coincides with the central axis of the first suction cylinder 21. And the central axis of the first suction cylinder 21 extends in the vertical direction.

In other embodiments, the suction tube 20 may have other shapes such as a square tube, a triangular tube, or a polygonal tube. Also, the plurality of suction cylinders 20 may be different in shape structure, for example, a part of the plurality of suction cylinders 20 is a cylinder and another part is a square cylinder, and the cylinder and the square cylinder may be alternately arranged. The base 10 may have other configurations, such as square, triangular, polygonal, truncated-cone, etc., which are not illustrated herein.

Optionally, the height of the first suction cylinder 21 is 4-8 times its outer diameter. The height of the first suction cylinder 21 is defined as the distance between the bottom end and the top end of the first suction cylinder 21 in the direction opposite to the extension of the central axis thereof.

Alternatively, the ratio of the height of the first suction cylinder 21 to the height of the second suction cylinder 22 is 2 to 6, and the ratio of the height of the second suction cylinder 22 to the height of the third suction cylinder 23 is 2 to 6. I.e. the ratio of the heights of two adjacent suction cartridges is 2-6. Further optionally, the ratio of the heights of two adjacent suction cartridges is 2-4.

Further optionally, the third suction cylinder 23 has an outer diameter 2-4 times the outer diameter of the first suction cylinder 21. Further optionally, the third suction cylinder 23 has an outer diameter 2-4 times the outer diameter of the first suction cylinder 21.

Alternatively, the ratio of the outer diameters of the first suction cylinder 21 to the second suction cylinder 22 is 1.5 to 3. The ratio of the outer diameters of the second suction cylinder 22 to the third suction cylinder 23 is 1.5 to 3.

In some embodiments, the offshore wind power suction foundation further comprises a diaphragm. The partition plate is arranged between two adjacent suction cylinders 20, and the space between two adjacent suction cylinders 20 is divided into a plurality of cabins.

As an example, as shown in fig. 2, the offshore wind power suction foundation includes a plurality of first bulkheads 24 and a plurality of second bulkheads 25. The first partition plates 24 are provided between the first suction tube 21 and the second suction tube 22, and the plurality of first partition plates 24 are provided at equal intervals in the circumferential direction of the first suction tube 21. The second partition plate 25 is provided between the second suction tube 22 and the third suction tube 23, and the plurality of second partition plates 25 are provided at equal intervals in the circumferential direction of the first suction tube 21. The first partition 24 divides the space between the first suction canister 21 and the second suction canister 22 into a plurality of first compartments 26. The second partition 25 divides the space between the second suction canister 22 and the third suction canister 23 into a plurality of second compartments 27.

Further, the first partition plate 24 and the second partition plate 25 extend in the vertical direction, and perpendicularity in the sinking process of the offshore wind power suction type foundation can be controlled.

The offshore wind power suction foundation comprises a fan (not shown in the figure), the fan is arranged at the top end of a stand column, and the fan comprises an impeller. The extending direction of the rotating central line of the impeller is the main wind direction. Since the fan is required to bear the wind force in the main wind direction, the force borne by the fan is transmitted downward to the upright column, so that the force borne by the upright column is much larger than the force of the water wave, and in order to resist the wind force, in some embodiments of the present invention, the outer peripheral contour of the cross section of the suction cylinder 20 may be made elliptical. The extending direction of the rotation center line of the impeller is the same as the extending direction of the major axis of the ellipse. That is, the major axis of the oval suction tube 20 extends in the main wind direction.

Because the ellipse shape has a bias flow line type, the ellipse shape can more effectively reduce the impact effect of the fluid on the surface of the ellipse shape than the common circle shape, so that the stability of the elliptical suction tube 1 is stronger, the suction tube can bear the impact force of stronger sea wind, the suction tube 20 is prevented from inclining or falling down under the impact force of the sea wind, the stability of the suction tube 20 is ensured, and the bearing capacity and the stability of the offshore wind power suction foundation are further enhanced.

In some embodiments, it is also possible to make the outer peripheral profile of the cross section of the pillar elliptical, and the long axis of the outer peripheral profile of the cross section of the pillar extends in the same direction as the rotational center line of the impeller. That is to say, the major axis of oval stand 2 extends along the main wind direction for stand 2 has the ability of anti sea wind impact, has further strengthened marine wind power suction type foundation's bearing capacity and steadiness.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.