CN210766852U - Foundation structure and wind generating set - Google Patents

Abstract

The utility model relates to a foundation structure and a wind power generating set. The base structure is used to support the tower, which includes: a base assembly, buried below the ground; a conversion assembly, located between the base assembly and the bottom of the tower, the conversion assembly includes a transfer table and a support column, one end of the support column away from the ground Reach into the adapter to set the tower overhead at a predetermined height from the ground. In the utility model, the tower is set overhead through the conversion component, so that enough space can be reserved under the tower for farmland cultivation, road passage, etc., and the floor space is saved. In addition, the end of the support column in the conversion assembly that is far away from the ground extends into the transfer platform, which can effectively disperse the load on the tower and transfer it to the underground foundation assembly. The force transmission path is clear and the stability of the tower is improved.

Description

Infrastructure and wind turbines

technical field

The utility model relates to the technical field of wind power generation, in particular to a basic structure and a wind power generating set.

Background technique

With the country's vigorous promotion of decentralized wind power generation projects, more and more small-scale decentralized wind turbines are used in farmland, communities, villages, roads and other scenarios. After connecting to the local power grid, the power generation can be achieved locally. Consumptive. However, the basic structure of wind turbines generally covers a very large area, especially occupying a lot of cultivated land and roads, which cannot meet the traffic requirements of rural roads or the needs of application scenarios such as farmland and greenhouses, which increases the difficulty and cost of land acquisition.

Utility model content

The purpose of the utility model is to provide a basic structure and a wind power generating set, the basic structure occupies a small area and has a short construction period on site.

On the one hand, an embodiment of the present utility model also proposes a basic structure, which is used to support the tower, which includes: a basic component, buried below the ground; a conversion component, located between the basic component and the bottom of the tower, The conversion assembly includes an adapter table and a support column, and one end of the support column away from the ground extends into the adapter table, so as to set the tower overhead and be separated from the ground by a predetermined height.

According to an aspect of the embodiment of the present invention, a plurality of support columns spaced along the circumferential direction are arranged between the base assembly and the adapter table, the adapter table includes an annular beam, and the plurality of support columns are connected to the annular beam.

According to one aspect of the embodiment of the present invention, the annular beam includes an annular web, an upper wing plate and a lower wing plate connected with the axial ends of the web plate, the upper wing plate is connected with the bottom of the tower, and the support column penetrates through the lower wing plate. flap and abut against the upper flap.

According to an aspect of the embodiment of the present invention, the web of the annular beam is further provided with reinforcing beams, and the reinforcing beams are arranged along the circumferential direction corresponding to the plurality of support columns.

According to an aspect of the embodiment of the present invention, the annular beam includes standard segments and node segments that are segmented and alternately arranged in the circumferential direction, and the standard segments and the node segments respectively include an upper wing plate segment forming an upper wing plate, and a lower wing plate forming The lower wing plate segment forms the web plate segment of the web; the support column penetrates the lower wing plate segment of the node segment and abuts against the upper wing plate segment, and the reinforcing beam is connected with the web segment of the node segment.

According to an aspect of the embodiment of the present invention, the adapter table further includes support plates located at both axial ends of the annular beam, wherein one support plate is connected with the upper wing plate, and the other support plate is connected with the lower wing plate, so as to connect the adapter The table enclosure is a closed structure with a hollow interior.

According to an aspect of the embodiment of the present invention, the interior of the support column is hollow, and one end of the support column away from the adapter table is buried below the ground to a predetermined depth and connected with the foundation assembly.

According to an aspect of the embodiment of the present invention, the support column is inclined inwardly by a predetermined angle in a vertical direction.

According to an aspect of the embodiment of the present invention, the foundation assembly includes a bearing platform and a pile body anchored with the bearing platform, and the bearing platform is connected with the support column.

According to an aspect of the embodiment of the present invention, the bearing platform is a columnar structure, a plurality of bearing platforms are arranged in the circumferential direction, and each bearing platform is embedded with one or more piles; Each pile body is embedded in the conical platform structure.

On the other hand, an embodiment of the present invention also provides a wind power generator set, which includes a base structure, a tower, and an energy conversion device mounted on the tower, and the base structure is any of the aforementioned base structures .

In the basic structure provided by the embodiment of the present invention, the tower is set overhead through the conversion assembly, so that enough space can be reserved under the tower for farmland cultivation, road passage, construction of buildings or equipment, etc., saving floor space. In addition, the end of the support column in the conversion assembly away from the ground extends into the adapter, which can effectively disperse the load on the tower and transfer it to the base assembly below the ground. The force transmission path is clear and the stability of the tower is improved.

Description of drawings

The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

1 is a schematic structural diagram of a tower provided by an embodiment of the present invention;

Fig. 2 is the sectional structure schematic diagram shown along the direction A-A in Fig. 1;

Fig. 3 is the enlarged structural schematic diagram of the area B in Fig. 1;

Fig. 4 is the structural schematic diagram of a kind of foundation assembly of the tower shown in Fig. 1;

FIG. 5 is a schematic structural diagram of another base assembly of the tower shown in FIG. 1;

FIG. 6 is a schematic structural diagram of another base assembly of the tower shown in FIG. 1 .

in:

T-tower; G-ground; H1-predetermined height; H2-predetermined depth;

10-base components; 11-bearing platform; 12-pile body;

20-conversion assembly; 21-transfer table; 211-ring beam; 212-support plate; 213-reinforcing beam; 22-support column; 1-upper wing plate; 2-lower wing plate; 3-web plate; A- Standard segment; B-node segment.

Detailed ways

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention; and, the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; either directly or indirectly. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In order to better understand the present invention, the basic structure and the wind power generator set provided by the embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 6 .

The basic structure provided by the present invention is described by taking a tower applied to a wind power generator set as an example, and the wind power generator set includes a basic structure, a tower, and an energy conversion device mounted on the tower. For large wind turbines, the energy conversion equipment will be subjected to repeated loads and eccentric forces in the 360° direction, so the stability of the tower is required to be high.

Referring to FIG. 1 , an embodiment of the present invention provides a basic structure for supporting a tower T, and the basic structure includes a basic assembly 10 and a conversion assembly 20 .

The base unit 10 is buried below the ground G, and the "ground G" includes various forms such as land, sand, seabed, and mountain top, and any location may be used as long as the wind turbine can be installed.

The conversion assembly 20 is located between the base assembly 10 and the bottom of the tower T. The conversion assembly 20 includes an adapter table 21 and a support column 22. One end of the support column 22 away from the ground G extends into the adapter table 21 to connect the tower T It is set overhead and is separated from the ground G by a predetermined height H1.

The adapter table 21 can be a reinforced concrete structure or a steel structure. The end of the support column 22 away from the ground G extends into the adapter table 21, which can directly disperse the load received by the tower T and transfer it to the base assembly 10 below the ground G. The force transmission path is clear, the support is stable, and the existing load is eliminated. Some stress concentration problems with angled support forms, improved support reliability.

The predetermined height H1 between the tower T and the ground G may be, for example, 4 m to 10 m. Taking the construction of the tower on the field road as an example, the maximum height of agricultural trucks is 4.7 meters, the clearance height under the transfer platform 21 can be 6.5m, and the clear width or diameter can be 9.2m, which meets the requirements of agricultural vehicles to pass, so that enough space can be reserved. The space is used for farmland cultivation, road access, etc., reducing the permanent land acquisition area.

In the basic structure provided by the embodiment of the present invention, the tower T is set overhead through the conversion assembly 20, so that enough space can be reserved under the tower T for farmland cultivation, road passage, construction of buildings or equipment, etc., saving land occupation area. In addition, the end of the support column 22 in the conversion assembly 20 away from the ground G extends into the adapter table 21, which can effectively disperse and transfer the load received by the tower T to the base assembly 10 below the ground G, and the force transmission path is clear, improving the the stability of the tower T.

The specific structures of the base assembly 10 and the conversion assembly 20 will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 to FIG. 3 together. A plurality of support columns 22 are arranged between the base assembly 10 and the adapter table 21 and are distributed at intervals along the circumferential direction, preferably evenly distributed, so that the plurality of support columns 22 can bear the The load of the tower T; the adapter 21 includes a ring beam 211 , and a plurality of support columns 22 are connected with the ring beam 211 .

The annular beam 211 is generally a steel beam with a simple structure and can be pre-fabricated in a factory, which shortens the construction period on site compared to a structure formed by concrete pouring at the assembly site.

Optionally, the annular beam 211 is an I-beam beam, which includes an annular web 3 and an upper wing plate 1 and a lower wing plate 2 connected with the axial ends of the web plate 3, the upper wing plate 1 and the tower T The bottom is connected, a plurality of support columns 22 penetrate through the lower wing plate 2 and abut against the upper wing plate 1 . The annular beam 211 has good bending resistance, and can effectively transmit the load received by the tower T to the foundation assembly 10 below the ground G through the plurality of support columns 22, thereby improving the stability of the tower.

Further, reinforcing beams 213 are further provided in the web 3 of the annular beam 211 , and the reinforcing beams 213 are arranged along the circumferential direction corresponding to the plurality of support columns 22 . Optionally, the number of the supporting columns 22 is four, and the reinforcing beams 213 are distributed in the web 3 of the annular beam 211 in a cross shape, so as to improve the structural strength and rigidity of the annular beam 211 .

Since the bearing area of the adapter table 21 is at least greater than or equal to the bottom area of the tower T, the maximum diameter dimension (eg 6.5m) of the adapter table 21 exceeds the general road transportation limit of 5m. In order to facilitate the transportation of the adapter table 21, the annular beam 211 can be arranged in sections.

Optionally, the annular beam 211 includes a standard segment A and a node segment B which are segmented and alternately arranged along the circumferential direction, and the standard segment A and the node segment B respectively include an upper wing plate segment forming the upper wing plate 1 and a lower wing plate 2 The lower wing plate section of the node section B forms the web plate section of the web 3, the support column 22 penetrates the lower wing plate section of the node section B and abuts against the upper wing plate section, and the reinforcing beam 213 is connected with the web section of the node section B.

Wherein, the upper and lower wing plate segments of the standard segment A can be arc-shaped plates, and the upper and lower wing plate segments of the node segment B are special-shaped plates whose surface area is at least larger than the transverse direction of the support column 22 . Sectional area.

Taking the four support columns 22 as an example, the number of the standard segment A and the node segment B of the annular beam 211 is four respectively. The large-diameter annular beam 211 can be divided into four standard segments A and four node segments B after the fabrication is completed. The transportation tool is transported from the processing site to the assembly site, and then the standard segment A and the node segment B are spliced into a complete annular beam 211 by high-strength bolts at the assembly site, and the standard segment A and the node segment B can also be welded into a complete ring. Beam 211. The reinforcing beam 213 and the node segment B can be connected by welding or by high-strength bolts.

Further, the adapter table 21 also includes support plates 212 located at both axial ends of the annular beam 211 , one of the support plates 212 is connected to the upper wing plate 1 , and the other support plate 212 is connected to the lower wing plate 2 to connect the adapter The table 21 is enclosed into a closed structure with a hollow interior for placing related equipment or components. The support plate 212 may be a concrete plate formed by casting with the annular beam 211, or may be a steel plate. Steel plates can be prefabricated at the factory, and the construction period is shorter compared to concrete slabs.

If the diameter of the support plate 212 exceeds the general road transportation limit, the support plate 212 can also be arranged in segments along the circumferential direction, and the number of segments can be the same as or different from that of the annular beam 211 .

Therefore, the components of the adapter table 21 are prefabricated in the factory and transported to the assembly site. First, the standard segments A and the node segments B are spliced into a ring beam 211. After one end of each support column 22 is fixed to the base assembly 10, the other end is The positions passing through the lower wing plate are connected by spot welding, and the top of the support column 22 is abutted against the upper wing plate 1 and the two are fixedly connected by high-strength bolts. Each support plate segment is assembled into a complete support plate 212 and then welded or bolted to the upper wing plate 1 and the lower wing plate 2 of the complete annular beam 211 respectively. The bottom of the tower T is connected with the upper wing plate 1 by welding or fixedly connected by flange bolts, and then the components on the upper part of the tower T are continued to be hoisted.

Since the adapter table 21 made of the annular beam 211 is lighter in weight than the adapter table 21 made of reinforced concrete while satisfying structural rigidity and strength, the outer contour size of the annular beam 211 can be designed to be relatively large. Therefore, the tower T can adopt a customized solution, the upper part of which is a conventional steel structure tower or a concrete tower, and the bottom is enlarged in diameter. Tower T, reducing the footprint. The voltage at one end of the wind turbine can be connected to the local power grid after being boosted by the transformer in the tower T. In addition, the electricity generated by the wind turbine can be directly used for farmland irrigation or charging of agricultural machinery, realizing the purpose of local consumption of decentralized power generation projects.

Further, in order to improve the structural strength and rigidity of the support column 22 , the support column 22 is hollow inside, and one end of the support column 22 away from the adapter 21 is buried in the ground G to a predetermined depth H2 and connected to the base assembly 10 . The support column 22 may be a steel pipe column or a steel pipe concrete column, and the diameter of the cross section is generally between 0.8m and 2m, and the wall thickness is between 25mm and 32mm. The predetermined depth H2 may be, for example, 0.5m to 0.8m, that is, 0.5m to 0.8m of land is reserved for the upper part of the foundation assembly 10 . During the construction of the tower, remediation measures can be taken for the land reserved on the upper part of the foundation component 10 to restore the land damaged due to digging, collapse, occupancy, etc. to a state that can be cultivated, so as to reduce the amount of land waste of resources.

In order to further increase the support area of the adapter table 21 and further improve the stability of the tower T, the support columns 22 are arranged inwardly inclined at a predetermined angle in the vertical direction. The predetermined angle may be, for example, 0°˜15°, and if the predetermined angle is too large, the support strength of the support column 22 will be reduced. Correspondingly, the adapter table 21 has a conical table structure, and the outer contour dimension of the lower wing plate 2 of the annular beam 211 is larger than that of the upper wing plate 1 to meet the connection strength between the annular beam 211 and the support column 22 .

Please refer to FIGS. 4 to 6 together. The foundation assembly 10 includes a bearing platform 11 and a pile body 12 anchored to the bearing platform 11 . The bearing platform 11 is embedded at a predetermined depth H2 below the ground G and is connected to a plurality of support columns 22 . The depth of the pile body 12 below the ground G is about 20m-30m, so that the safety margin of the single pile's compression resistance and pullout resistance can meet the design requirements.

In some embodiments, the bearing platform 11 is a conical platform structure, and the conical platform structure may be solid or hollow, as shown in FIG. 11, the number is about 50 to 60. The four support columns 22 are evenly distributed along the circumferential direction and are arranged corresponding to the pile body 12 . The pile body 12 can be a prestressed high-strength concrete (PHC, thePrestressed High-intensity Concrete) pipe pile, which adopts the pre-tensioning method and advanced technologies such as adding abrasives and superplasticizers to compact the concrete through centrifugal dehydration. , a hollow equal-section precast concrete member made of regular pressure and high pressure steam curing twice. PHC pipe pile has the advantages of high bearing capacity of single pile, good hammer resistance of pile body, strong penetrating force and low cost.

The foundation assembly 10 is suitable for large-scale wind turbines, wherein the hollow conical platform structure is suitable for areas with complex terrain, and the solid conical platform structure has a large bearing capacity of the pile foundation and saves the amount of concrete.

In some embodiments, the bearing platform 11 is a columnar structure, such as a cylinder or a polygonal column, and a plurality of bearing platforms 11 are arranged in the circumferential direction. As shown in FIG. 5 , the bearing platform 11 is a cubic structure, and each bearing platform 11 A plurality of pile bodies 12 are embedded therein. The support column 22 is provided corresponding to a part of the pile body 12, and the pile body 12 may be the aforementioned PHC pipe pile. The base assembly 10 is suitable for smaller wind turbines.

In some embodiments, the bearing platform 11 is a columnar structure, such as a cylinder or a polygonal column, a plurality of bearing platforms 11 are arranged along the circumferential direction, and a pile body 12 is embedded in each bearing platform 11 , as shown in FIG. 6 . The four pile bodies 12 are large-diameter cast-in-place piles, which are directly formed by opening holes in the designed pile positions, and then adding reinforcement cages into the holes and pouring concrete into the holes. The support columns 22 are arranged in a one-to-one correspondence with the pile bodies 12 . The cross section of the cast-in-place pile is circular, and its outer diameter may be larger than that of the support column 22 , so as to provide better support for the support column 22 . The base assembly 10 is suitable for smaller wind turbines.

Therefore, the wind power generator set provided by the present invention adopts any of the aforementioned basic structures, and can effectively pass the load received by the tower T through the adapter table 21 formed by the annular beam 211 and the plurality of support columns 22. The ground is dispersed and transferred to the foundation assembly 10 below the ground G, which improves the support reliability and safety margin of the tower.

In addition, since the tower T is set overhead by a plurality of support columns 12, enough space can be reserved to meet the needs of application scenarios such as farmland, construction of greenhouses, road traffic, etc., and the structure of the ring beam 211 makes the tower T The diameter of the bottom can also be expanded, so that the gearbox can be built into the tower T, which further reduces the floor space, reduces the difficulty of land acquisition, and is conducive to the further promotion of decentralized wind power generation projects.

While the invention has been described with reference to the preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (11)

1. A foundation structure for supporting a tower (T), characterized in that it comprises:

a foundation assembly (10) buried under the ground (G);

the conversion assembly (20) is located between the base assembly (10) and the bottom of the tower (T), the conversion assembly (20) comprises a conversion table (21) and a supporting column (22), one end, far away from the ground (G), of the supporting column (22) extends into the conversion table (21) so as to enable the tower (T) to be arranged in an overhead mode and to be away from the ground (G) by a preset height (H1).

2. The substructure according to claim 1, characterized in that a plurality of said supporting columns (22) are arranged between said foundation assembly (10) and said transition table (21) and are distributed at intervals in the circumferential direction, said transition table (21) comprising an annular beam (211), a plurality of said supporting columns (22) being connected to said annular beam (211).

3. Infrastructure according to claim 2, characterized in that said ring beam (211) comprises a ring-shaped web (3) and an upper wing (1) and a lower wing (2) connected to the axial ends of said web (3), said upper wing (1) being connected to the bottom of said tower (T), said support column (22) penetrating said lower wing (2) and abutting to said upper wing (1).

4. A substructure according to claim 3, characterized in that a reinforcement beam (213) is also provided in the web (3) of the ring beam (211), which reinforcement beam (213) is arranged circumferentially in correspondence to a plurality of the support columns (22).

5. The substructure of claim 4, characterized in that the ring beams (211) comprise circumferentially segmented and alternately arranged standard sections (A) and nodal sections (B) comprising respectively an upper panel section forming the upper panel (1), a lower panel section forming the lower panel (2), a web section forming the web (3);

the support column (22) extends through the lower panel section and abuts to the upper panel section of the node section (B), the reinforcement beam (213) being connected with the web section of the node section (B).

6. Infrastructure according to claim 3, characterized in that said transfer station (21) further comprises support plates (212) located at the axial ends of said annular beam (211), one of said support plates (212) being connected to said upper wing (1) and the other of said support plates (212) being connected to said lower wing (2) to enclose said transfer station (21) into an internally hollow closed structure.

7. Infrastructure according to claim 1, characterized in that the support columns (22) are arranged hollow inside and that the end of the support columns (22) remote from the transfer station (21) is buried a predetermined depth (H2) below the ground (G) and connected to the foundation assembly (10).

8. Infrastructure according to claim 1, characterized in that the supporting columns (22) are arranged inclined inwards in a vertical direction by a predetermined angle.

9. Infrastructure according to claim 1, characterized in that the foundation assembly (10) comprises a load carrier (11) and piles (12) anchored to the load carrier (11), the load carrier (11) being connected to the support columns (22).

10. The substructure of claim 9, characterized in that the bearing platforms (11) are columnar structures, a plurality of bearing platforms (11) are arranged along the circumference, each bearing platform (11) is embedded with one or more pile bodies (12);

or the bearing platform (11) is of a conical platform structure, and the pile bodies (12) are embedded into the conical platform structure.

11. A wind park comprising a substructure, a tower (T) and an energy conversion apparatus mounted on the tower (T), characterized in that the substructure is a substructure according to any of claims 1 to 10.

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