Supporting assembly, single-column type pipe frame foundation and offshore wind generating set

Abstract

The utility model provides a supporting assembly, a single-column type pipe frame foundation and an offshore wind generating set. The supporting assembly is used for the single-column type pipe frame foundation of the offshore wind generating set, the supporting assembly comprises a tower tube connecting part, a base and a middle structure located between the tower tube connecting part and the base, and the middle structure is in an inverted cone shape in the direction from the tower tube connecting part to the base. According to the supporting assembly, through the inverted-cone-shaped middle structure, the influence of waves on the single-column type pipe frame foundation can be effectively reduced, so that the wave load of the single-column type pipe frame foundation is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, and particularly relates to a support assembly, a single-column pipe rack foundation and an offshore wind turbine generator set. Background Art

[0002] In the field of wind power generation, the energy supply of offshore wind power is relatively stable and has the potential for continuous and stable hydrogen production. Therefore, recently, hydrogen production from offshore wind power has become a new direction for industrial development, and the offshore wind power industry has broad development space and potential.

[0003] However, since the offshore wind power industry faces problems such as rising costs, in order to reduce the comprehensive cost of offshore wind power development, customized designs are made for the foundations of offshore wind turbine generators according to different water depths or different sites. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a support assembly, a single-column pipe rack foundation and an offshore wind turbine generator set for a single-column pipe rack foundation of an offshore wind turbine generator. The support assembly can effectively reduce the influence of waves on the single-column pipe rack foundation and reduce costs.

[0005] According to one aspect of the utility model, a support assembly is provided. The support assembly is used for a single-column pipe rack foundation of an offshore wind turbine generator. Wherein, the support assembly includes a tower barrel connection part, a base and an intermediate structure located between the tower barrel connection part and the base. The intermediate structure is in an inverted conical shape in the direction from the tower barrel connection part to the base.

[0006] Preferably, the intermediate structure may include a plurality of columns. Each of the plurality of columns is partially inserted into the base and extends upward divergently from the base to connect to the tower barrel connection part.

[0007] Preferably, the intermediate structure may further include a plurality of cross braces. The plurality of cross braces are spaced apart from each other and respectively connect a pair of columns adjacent to each other in the circumferential direction among the plurality of columns.

[0008] Preferably, the cross brace may be a hollow pipe, and the diameter of the cross brace may be smaller than the diameter of the column.

[0009] Preferably, the inside of the base may be filled with concrete, or the base may be a hollow suction cylinder.

[0010] According to another aspect of the utility model, a single-column pipe rack foundation is provided. The single-column pipe rack foundation is used for an offshore wind turbine generator. Wherein, the single-column pipe rack foundation includes at least three pile members and the support assembly as described above.

[0011] Preferably, the single-column pipe rack foundation may further include: a diagonal brace assembly that connects the at least three pile members to the tower connection portion of the support assembly and has a bent portion extending into the pile members; a connecting member that connects the at least three pile members to the base of the support assembly.

[0012] Preferably, the at least three pile members may be suction caissons, which can be partially sunk under the seabed mud surface and have a concrete-filled section and a hollow section located below the concrete-filled section, wherein the height of the concrete-filled section may be greater than a predetermined height.

[0013] Preferably, the pile member may include a partition plate disposed between the concrete-filled section and the hollow section to separate the concrete-filled section from the hollow section.

[0014] According to another aspect of the present invention, there is provided an offshore wind turbine generator, which includes the single-column pipe rack foundation as described above.

[0015] The support assembly of the single-column pipe rack foundation for an offshore wind turbine generator according to the present invention adopts an overall inverted conical structure, so that the influence of waves on the single-column pipe rack foundation can be effectively reduced by a simple structure, thereby reducing the wave load on the single-column pipe rack foundation. In addition, the support assembly can be composed of a plurality of small-diameter tubular members, so that the wave load can be further reduced.

[0016] In addition, the single-column pipe rack foundation for an offshore wind turbine generator according to the present invention can improve the stiffness, thereby reducing the load, reducing the overall engineering quantity of the offshore foundation structure, and optimizing the project cycle and overall cost. In addition, the single-column pipe rack foundation according to the present invention adopts a concrete-filled steel tube hybrid structure in the key support areas and connection positions, so that stress concentration can be effectively prevented and the fatigue resistance can be improved.

[0017] In addition, the offshore wind turbine generator according to the present invention includes the single-column pipe rack foundation as described above, so that the underwater load of the whole machine can be reduced and the overall efficiency of the whole machine can be improved, thereby reducing the risk of resonance between the offshore wind turbine generator and waves, etc., and ensuring the stable operation of the offshore wind turbine generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Through the following description of the embodiments of the present application in conjunction with the drawings, the above and other objects and features of the present application will become clearer. In the drawings:

[0019] Figure 1 is a schematic perspective view showing a single-column pipe rack foundation according to an embodiment of the present invention;

[0020] Figure 2 is a schematic perspective view showing Figure 1 the support assembly in the single-column pipe rack foundation in

[0021] Figure 3 is Figure 2 a sectional view of

[0022] Figure 4 is Figure 1 a partial view of the pile member and the diagonal bracing assembly in use in

[0023] Figure 5 is a partial view corresponding to Figure 4 according to another embodiment of the present utility model.

[0024] Reference numerals in the drawings:

[0025] 1 - single-column pipe rack foundation; 10 - pile member; 110 - concrete filling section; 120 - hollow section; 130 - partition plate; 20 - diagonal bracing assembly; 210 - bending portion; 220 - extension portion; 30 - support assembly; 310 - base; 320 - tower barrel connection portion; 330 - intermediate structure; 331 - column; 332 - cross brace; 40 - connecting member; 410 - first connecting member; 420 - second connecting member; C - concrete; H1 - height; P1 - mud surface. Detailed embodiments

[0026] In order to enable those skilled in the art to better understand the technical concept of the present utility model, the following will clearly, completely, and in detail describe the specific embodiments of the present utility model with reference to the accompanying drawings. It should be clear that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For those of ordinary skill in the art, the specific meaning of the terms used can be understood according to the specific circumstances in the present utility model.

[0028] It will be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements will not be limited by these terms. More precisely, these terms are only used to distinguish one element from another. Therefore, without departing from the teachings of the exemplary embodiments, the first element described in the exemplary embodiments herein may also be referred to as the second element.

[0029] For ease of description, the "inner", "outer", "upper", and "lower" mentioned hereinafter are consistent with the inner, outer, upper, and lower directions of the attached drawings themselves, but do not limit the structure of the present utility model.

[0030] In addition, throughout the specification, when an element is described as being "disposed on", "connected to", or "coupled to" another element, the element can be directly "disposed on" the other element, directly "connected to" the other element, or directly "coupled to" the other element, or there may be one or more other elements therebetween.

[0031] The present utility model aims to provide a support assembly for a single-column pipe rack foundation of an offshore wind turbine generator, a single-column pipe rack foundation, and an offshore wind turbine generator. The support assembly can effectively reduce the impact of waves on the single-column pipe rack foundation and reduce costs.

[0032] In the prior art, in order to reduce the comprehensive cost of offshore wind power development, customized foundation designs are carried out for different water depths and different sites. From an economic perspective, in the case where the water depth is less than a specific threshold (for example, 20 m), a single-pile foundation is usually selected. In the case where the water depth exceeds another specific threshold (for example, 40 m), a jacket structure foundation is usually selected. However, within the range between the two specific thresholds of water depth (for example, 20 m - 40 m), there is no suitable and economical foundation structure.

[0033] As the water depth increases, the driving depth and diameter of the traditional single-pile foundation continuously increase, and the construction difficulty continuously increases. In addition, the traditional single-pile foundation is greatly affected by waves, the tower bottom fatigue load is extremely large, and the fatigue bearing capacity of the circumferential weld of the steel tower barrel main body matched with the single-pile foundation is relatively low. As the water depth increases and the wave influence increases, it may be difficult to ensure the reliability between the traditional single-pile foundation and the steel tower barrel main body. Therefore, in the case of a relatively deep water depth (for example, the water depth is greater than or equal to 20 m), using the traditional single-pile foundation may lead to an increase in cost and it is difficult to ensure reliability. In addition, in the case of a relatively shallow water depth (the water depth is less than or equal to 40 m), if the traditional jacket structure foundation is adopted, there is a problem that the engineering quantity is too large and it is not conducive to cost reduction.

[0034] Therefore, in order to effectively reduce the impact of waves on the foundation and reduce costs, a support assembly for a single-column pipe rack foundation applicable to an offshore wind turbine generator and a single-column pipe rack foundation including the same are proposed here, and an offshore wind turbine generator using the single-column pipe rack foundation is also proposed.

[0035] Hereinafter, reference will be made to Figures 1 to 4Describe in detail a support assembly for a single-column pipe rack foundation for an offshore wind turbine generator according to an embodiment of the present invention, and a single-column pipe rack foundation including the same.

[0036] Refer to Figure 1 , the single-column pipe rack foundation 1 for an offshore wind turbine generator may include a pile member 10 and a support assembly 30. In addition to the pile member 10 and the support assembly 30, the single-column pipe rack foundation 1 may further include a diagonal bracing assembly 20 and a connecting member 40.

[0037] To ensure the structural stability of the single-column pipe rack foundation 1, the single-column pipe rack foundation 1 may include at least three pile members 10 and support assemblies 30. Although Figure 1 shows a structure in which the single-column pipe rack foundation 1 includes three pile members 10 and three support assemblies 30, it is not limited thereto, and the number of pile members 10 and support assemblies 30 may be adjusted according to actual needs. For example, the single-column pipe rack foundation 1 may include four pile members 10 and four support assemblies 30.

[0038] Next, the specific structure of the support assembly 30 of the single-column pipe rack foundation 1 according to the present embodiment will be described in detail below, and other components of the single-column pipe rack foundation 1 will be described in detail later.

[0039] As Figures 1 to 3 shown, the support assembly 30 according to the embodiment includes a tower barrel connection part 320, a base 310, and an intermediate structure 330 located between the tower barrel connection part 320 and the base 310. The intermediate structure 330 is in an inverted conical shape in the direction from the tower barrel connection part 320 to the base 310.

[0040] The base 310 can be used to support the overall structure, the tower barrel connection part 320 can be used to be combined with the tower barrel of the offshore wind turbine generator, and the intermediate structure 330 can be fixedly combined with the base 310 and the tower barrel connection part 320.

[0041] Specifically, the base 310 can be in the shape of a column. The inside of the base 310 is filled with concrete C, or the base 310 is a hollow suction cylinder. Specifically, the base 310 can have a cavity, and the inside of the cavity can be filled with concrete C, so that the weight of the base 310 can be increased, so that the base 310 can be buried below the mud surface P1 at the bottom of the water under its own weight. In addition, when the base 310 is a hollow suction cylinder, the base 310 can be buried below the mud surface P1 by negative pressure. Therefore, when the base 310 is buried below the mud surface P1, the support effect on the overall structure of the support assembly 30 can be enhanced, thereby ensuring the overall structural stability. In addition, stud bolts or stiffening ribs can be provided on the inner wall of the base 310 to enhance the connection strength between the concrete C and the base 310.

[0042] The tower barrel connection part 320 may also have a column shape, but is not limited thereto. For example, it may have a hexahedron shape or the like. As Figure 2 shown, the diameter of the base 310 in the column shape is larger than the diameter of each tubular member constituting the intermediate structure 330, and smaller than the diameter of the tower barrel connection part 320. When the tower barrel connection part 320 is formed into a column shape, the tower barrel connection part 320 can be connected to the tower barrel flange of the offshore wind turbine generator.

[0043] In this embodiment, the intermediate structure 330 adopts an inverted conical structure. Therefore, when the single-column pipe rack foundation 1 is installed underwater, the diameter of the area of the intermediate structure 330 in contact with water is smaller, so that the area of the support assembly 30 bearing the wave load is less, thereby reducing the influence of waves on the support assembly 30.

[0044] In addition, in this embodiment, the intermediate structure 330 is fixedly connected to the bottom of the tower barrel connection part 320. For example, the bottom of the intermediate structure 330 and the tower barrel connection part 320 can be connected by welding, but is not limited thereto. Since the diameter of the intermediate structure 330 gradually increases from the lower part to the upper part, the height and conical angle of the intermediate structure 330 and the size of the tower barrel connection part 320 can be adjusted to adapt to tower barrels with different diameters.

[0045] Referring to Figure 2 and Figure 3 , the intermediate structure 330 may include a plurality of columns 331. Each of the plurality of columns 331 is partially inserted into the base 310 and extends upward divergently from the base 310 to connect to the tower barrel connection part 320. The columns 331 can be made of steel (for example, low-alloy high-strength structural steel of Q355 to Q500) and can be formed into tubular members. Similar to the base 310, stud bolts or stiffening ribs can also be provided on the inner wall of the columns 331.

[0046] As an example, after the column 331 is inserted into the base 310, it can be fixedly connected to the top (for example, the upper end plate) of the base 310 by welding to enhance the connection reliability. Further, after the column 331 is inserted into the base 310, concrete C can be poured into the base 310 to further enhance the connection reliability and reduce the stiffness mutation, thereby improving the anti-fatigue performance.

[0047] The intermediate structure 330 may also include a plurality of cross braces 332. The plurality of cross braces 332 are spaced apart from each other and respectively connect a pair of columns 331 adjacent to each other in the circumferential direction among the plurality of columns 331. For example, the cross braces 332 can be welded to a pair of adjacent columns 331. In addition, the cross braces 332 must be hollow tubes (such as hollow steel tubes). The diameter of the cross braces 332 is smaller than the diameter of the columns 331 connected thereto. Therefore, it can be prevented that the welding correlation between the cross braces 332 and the columns 331 is large and the stress concentration coefficient is large, resulting in a decrease in force.

[0048] In addition, the cross brace 332 can be made of steel (e.g., low-alloy high-strength structural steel of Q355 to Q500). Therefore, the cross brace 332 can be a hollow steel pipe. If the cross brace 332 is formed by filling the steel pipe with concrete C, it may affect the strength of the welded part of the cross brace 332, resulting in the cross brace 332 may bear a large torque, and the difficulty of installation and manufacturing may increase. Therefore, in order to reduce the torque borne and reduce the manufacturing difficulty, the cross brace 332 does not use a concrete-filled steel tube structure.

[0049] Such as Figures 1 to 3 , the column 331 and the cross brace 332 can be in the form of small-diameter tubular members (e.g., small-diameter steel pipes). In other words, the intermediate structure 330 can be composed of small-diameter tubular members. Therefore, the effect of waves on the support assembly 30 can be further effectively reduced, that is, the wave load on the single-column pipe rack foundation 1 can be generally reduced. In the present utility model, the number and diameter of the columns 331 and the cross braces 332 are not limited to the number and diameter shown in the drawings, and can be adjusted according to actual needs.

[0050] Next, other components of the single-column pipe rack foundation 1 for an offshore wind turbine generator will be described in detail with reference to Figure 1 and Figure 4 .

[0051] As described above, the single-column pipe rack foundation 1 can include a pile member 10, a support assembly 30, a diagonal brace assembly 20, and a connecting member 40.

[0052] Specifically, the pile member 10 can preferably be a suction bucket. The pile member 10 can be partially sunk under the mud surface P1 at the bottom of the water. The pile member 10 can have a concrete-filled section 110 and a hollow section 120 located below the concrete-filled section 110 to increase the weight of the pile member 10, thereby enhancing the uplift resistance of the pile member 10. Preferably, the height H1 of the concrete-filled section 110 is greater than a predetermined height (e.g., 4 m) to fill a sufficient amount of concrete C, thereby ensuring that the pile member 10 has sufficient weight.

[0053] The diagonal brace assembly 20 can connect the pile member 10 to the tower connection part 320 of the support assembly 30, so it can provide a supporting effect on the support assembly 30, thereby making up for the possible deficiency in the stiffness of the support assembly 30.

[0054] The diagonal brace assembly 20 may have a bent portion 210 extending into the pile member 10 and an extension portion 220 extending from one end of the bent portion 210 toward the tower connection portion 320. The diagonal brace assembly 20 may be made of steel (e.g., low-alloy high-strength structural steel of Q355 to Q500) and may be formed as a tubular member. Therefore, the diagonal brace assembly 20 may have a hollow steel pipe structure. Alternatively, the diagonal brace assembly 20 may adopt a steel tube concrete structure. The support assembly 30 may, after extending the bent portion 210 into the pile member 10, firmly weld the lower end of the extension portion 220 and the top of the pile member 10 to each other using a welding process.

[0055] When installing the single-column pipe rack foundation 1, the pile member 10 as a suction cylinder can be partially sunk below the mud surface P1 at the bottom of the water. After the pile member 10 reaches the designated position, the pile member 10 is poured with concrete through the diagonal brace assembly 20, so that the concrete filling section 110 is filled, and the diagonal brace assembly 20 can be selectively poured with concrete. In the concrete filling section 110, bolts or reinforcing ribs 111 can be provided to enhance the connection strength between the poured concrete C and the pile member 10. Since the bent portion 210 of the diagonal brace assembly 20 extends into the concrete filling section 110 of the pile member 10, the connection reliability between the diagonal brace assembly 20 and the pile member 10 can be enhanced by pouring the concrete C.

[0056] The connection member 40 may connect the pile member 10 to the base 310 of the support assembly 30. In addition, the connection member 40 may include a first connection member 410 and a second connection member 420. The first connection member 410 may connect two pile members 10 adjacent to each other in the circumferential direction to each other, and the second connection member 420 may connect the first connection member 410 to the base 310. The first connection member 410 and the second connection member 420 may be made of steel (e.g., low alloy high strength structural steel of Q355 to Q500), and may be formed as a tubular member.

[0057] Therefore, compared with the traditional single pile foundation, the single column pipe rack foundation 1 according to this embodiment adopts a plurality of small diameter steel tube concrete composite structures, so it can effectively reduce the impact of waves on it, without the need for an internal prestressed tendon structure, and can reduce the amount of steel used, thereby reducing the overall cost. In addition, the single column pipe rack foundation 1 according to this embodiment can also have strong rigidity.

[0058] In addition, compared with the traditional pipe rack structure foundation, the single-column pipe rack foundation 1 according to this embodiment can have excellent load characteristics, simple structure, easy construction, thus reducing manufacturing costs and shortening processing cycles. For example, in this embodiment, the tubular members in the diagonal brace assembly 20, the support assembly 30 and the connecting member 40 can be standard parts.

[0059] Therefore, the single-column pipe rack foundation 1 according to the present embodiment can be applicable to the transition area between the water depths applicable to the traditional single-pile foundation and the water depths used by the traditional jacket structure foundation.

[0060] In addition, in key bearing areas such as the pile member 10 and the base 310, a concrete-filled steel tube structure is adopted to effectively improve the local connection bearing capacity. And at the connection positions such as the connection between the pile member 10 and the diagonal bracing assembly 20, and the connection between the column 331 and the base 310, the concrete-filled steel tube structure can effectively reduce the stiffness mutation, thereby reducing the stress concentration in the connection area and improving the anti-fatigue ability of the key joint welds.

[0061] When the offshore wind turbine generator set includes the single-column pipe rack foundation 1 according to the present embodiment, the underwater load of the whole machine can be reduced and the overall efficiency of the whole machine can be improved, so that the risk of resonance between the offshore wind turbine generator set and waves can be reduced, and the stable operation of the offshore wind turbine generator set can be ensured.

[0062] Figure 5 Shows a partial view corresponding to Figure 4 in another embodiment of the present utility model.

[0063] In the present embodiment, the pile member 10 may include a partition plate 130. Specifically, the partition plate 130 may be disposed between the concrete-filled section 110 and the hollow section 120 to separate the concrete-filled section 110 from the hollow section 120.

[0064] Therefore, before installing the single-column pipe rack foundation 1, concrete can be poured into the concrete-filled section 110 of the pile member 10. When the pile member 10 is a suction bucket, concrete can be first poured into the concrete-filled section 110, and then the pile member 10 is placed on the mud surface P1, and negative pressure is applied to the hollow section 120 of the pile member 10 through suction holes (not shown) to bury the hollow section 120 below the mud surface P1.

[0065] As described above, the support assembly of the single-column pipe rack foundation for an offshore wind turbine generator set according to the present utility model adopts a generally inverted conical structure. Therefore, the influence of waves on the single-column pipe rack foundation can be effectively reduced by using a simple structure, thereby reducing the wave load of the single-column pipe rack foundation and reducing the cost. In addition, the support assembly can be composed of a plurality of small-diameter tubular members, so the wave load can be further reduced.

[0066] In addition, the single-column pipe rack foundation for an offshore wind turbine generator according to the present utility model can improve the stiffness, thereby reducing the load, reducing the overall engineering quantity of the offshore foundation structure, and optimizing the project cycle and overall cost. Additionally, the single-column pipe rack foundation according to the present utility model adopts a concrete-filled steel tube hybrid structure in the key support areas and connection positions, so it can effectively prevent stress concentration and improve fatigue resistance.

[0067] In addition, the offshore wind turbine generator according to the present utility model includes the single-column pipe rack foundation as described above, so it can reduce the underwater load of the whole machine and improve the overall efficiency, thereby reducing the risk of resonance between the offshore wind turbine generator and waves, etc., and ensuring the stable operation of the offshore wind turbine generator.

[0068] The specific embodiments of the present utility model have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that these embodiments can be combined, modified, and improved without departing from the principle and spirit of the present utility model defined by the claims (for example, different technical features of the present utility model can be combined to obtain a new technical solution). These combinations, modifications, and improvements should also be within the protection scope of the present utility model.

Claims

1. A support component, the support component (30) is used for a single-column pipe rack foundation (1) of an offshore wind turbine generator set, and is characterized in that, The support assembly (30) includes a tower connection part (320), a base (310), and an intermediate structure (330) located between the tower connection part (320) and the base (310). The intermediate structure (330) is in an inverted conical shape in the direction from the tower connection part (320) to the base (310).

2. The support assembly according to claim 1, wherein, The intermediate structure (330) includes a plurality of columns (331). Each of the plurality of columns (331) is partially inserted into the base (310) and extends upward divergently from the base (310) to connect to the tower connection part (320).

3. The support assembly according to claim 2, wherein, The intermediate structure (330) further includes a plurality of cross braces (332). The plurality of cross braces (332) are spaced apart from each other and respectively connect a pair of adjacent columns (331) in the circumferential direction among the plurality of columns (331).

4. The support component according to claim 3, characterized in that, The cross brace (332) is a hollow tube, and the diameter of the cross brace (332) is smaller than the diameter of the column (331).

5. The support assembly according to claim 2 or 3, characterized in that, The interior of the base (310) is filled with concrete (C), or the base (310) is a hollow suction bucket.

6. A single-column pipe rack foundation, the single-column pipe rack foundation (1) being used for an offshore wind power generating unit, characterized in that, The single-column pipe rack foundation (1) includes at least three pile members (10) and the support assembly (30) according to any one of claims 1 to 5.

7. The single-column pipe rack foundation according to claim 6, wherein, The single-column pipe rack foundation (1) further includes: A diagonal brace assembly (20) that connects the at least three pile members (10) to the tower connection part (320) of the support assembly (30) and has a bending part (210) extending into the pile member (10); A connecting member (40) that connects the at least three pile members (10) to the base (310) of the support assembly (30).

8. The single-column pipe rack foundation according to claim 7, wherein, The at least three pile members (10) are suction buckets. The pile member (10) can be partially sunk under the seabed mud surface (P1) and has a concrete-filled section (110) and a hollow section (120) located below the concrete-filled section (110). Wherein, the height (H1) of the concrete-filled section (110) is greater than a predetermined height.

9. The single-column pipe rack foundation according to claim 8, characterized in that, The pile member (10) includes a partition plate (130). The partition plate (130) is arranged between the concrete-filled section (110) and the hollow section (120) to separate the concrete-filled section (110) from the hollow section (120).

10. An offshore wind power generation unit, characterized in that, The offshore wind turbine generator includes the single-column pipe rack foundation (1) according to any one of claims 6 to 9.

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