An assembled support structure for onshore wind turbine generators

Abstract

This utility model relates to a prefabricated support structure for onshore wind turbine generators, including a foundation layer, a post-cast inner steel cage column, a post-cast outer steel cage ring column, an annular platform column, and prefabricated components. The prefabricated components provide circumferential support for the post-cast outer steel cage ring column. The inner surface of the annular platform column is provided with a threaded inner steel reinforcement assembly for use with the post-cast inner steel cage column, and the outer surface of the annular platform column is provided with a threaded outer steel reinforcement assembly for connection and installation with the post-cast outer steel cage ring column. The prefabricated support structure for onshore wind turbine generators of this technical solution utilizes the threaded inner steel reinforcement assembly of the prefabricated annular platform column in conjunction with the internal post-cast inner steel cage column, and the threaded outer steel reinforcement assembly of the prefabricated annular platform column in conjunction with the post-cast outer steel cage ring column. The overall structure is stable, the prefabricated construction is quick, the installation accuracy is high, and the construction efficiency is effectively improved, meeting the needs of large single-unit capacity wind turbines.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine generators, specifically to an assembled support structure for onshore wind turbine generator sets. Background Technology

[0002] Wind power, as an important renewable energy source, has experienced rapid development, and the future development of the wind power industry will continue to show an expansion trend of "coordinated development between onshore and offshore areas, with accelerated growth on both tracks." Currently, the foundation structures for onshore wind power projects generally still use cast-in-place spread foundations or cast-in-place pile cap foundations, but these types of foundations have problems such as large casting volumes, difficulties in on-site curing, and long construction periods. Prefabricated structures can effectively solve the problems of cast-in-place construction. However, for wind turbines with large single-unit capacity (rated power generation capacity of a single unit), traditional prefabricated support structures involve more installation procedures, resulting in higher overall costs. Furthermore, the connection performance between internal structures within the support structure is relatively poor. For example, the connection performance between the central part of the support structure and the external columns, and between the external columns and the prefabricated foundation components, needs to be optimized to meet the installation performance requirements of large single-unit capacity wind turbines.

[0003] Therefore, to solve the above problems, a prefabricated support structure for onshore wind turbine generators is needed to address these technical issues. Utility Model Content

[0004] The prefabricated support structure of this onshore wind turbine generator set uses a prefabricated annular column with a threaded inner steel reinforcement assembly formed on the inner surface to cooperate with the internal cast-in-place inner steel reinforcement cage column for construction and installation. The prefabricated annular column with a threaded outer steel reinforcement assembly formed on the outer surface to cooperate with the cast-in-place outer steel reinforcement cage column for construction. The overall structure is stable, the prefabricated construction is fast, the installation accuracy is high, and the construction efficiency is effectively improved, meeting the needs of large single-unit capacity wind turbines.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An assembled support structure for an onshore wind turbine generator includes a cushion layer, a post-cast inner steel cage column, a post-cast outer steel cage ring column, an annular platform column, and precast components arranged on the cushion layer; the precast components form circumferential support for the post-cast outer steel cage ring column, the inner surface of the annular platform column is provided with a threaded inner steel reinforcement assembly for use with the post-cast inner steel cage column, and the outer surface of the annular platform column is provided with a threaded outer steel reinforcement assembly for connection and installation with the post-cast outer steel cage ring column.

[0006] Furthermore, the threaded inner sleeve reinforcing bar assembly includes a long reinforcing bar group, a medium-length reinforcing bar group, and a short reinforcing bar group disposed on the annular pedestal. The long reinforcing bar group is disposed on the upper part of the annular pedestal, and the short reinforcing bar group and the medium-length reinforcing bar group are both arranged at the lower end of the long reinforcing bar group, and the short reinforcing bar group and the medium-length reinforcing bar group are arranged alternately in the vertical direction.

[0007] Furthermore, the long steel bar assembly includes a column steel bar fixedly installed inside the annular column, a steel bar sleeve fixedly installed at the end of the column steel bar, and a long steel bar. One end of the long steel bar is connected and installed with the steel bar sleeve, and the other end of the long steel bar is installed with the post-cast inner steel cage column.

[0008] Furthermore, multiple sets of long steel bars are provided, and these multiple sets of long steel bars are evenly distributed on the inner surface of the annular column.

[0009] Furthermore, the threaded outer steel bar assembly includes multiple sets of outer steel bar groups arranged in parallel with each other, and the multiple sets of outer steel bar groups and the long steel bar groups are set at the same vertical height.

[0010] Furthermore, the prefabricated component is a circular support structure formed by assembling multiple prefabricated components. The prefabricated component includes an annular base plate installed on the cushion layer and ribs formed on the annular base plate (in actual production and use, the prefabricated component can be made into an integrated structure of an annular base plate, ribs, and an internal annular column). The end face of the rib is installed in conjunction with the post-cast external steel cage annular column.

[0011] Furthermore, a joint is formed between each pair of adjacent annular base plates, and rectangular steel bars are pre-embedded in the annular base plates. The rectangular steel bars protrude from the ends of the annular base plates and extend into the joint, and radial steel bars are installed inside the rectangular steel bars.

[0012] Furthermore, a shear key structure is formed on the annular base plate, and the shear key structure is evenly and equally distributed in the radial direction of the same annular base plate.

[0013] Furthermore, the inner surface of the rib beam has protrusions forming rib beam reinforcing bars, which are then connected and installed in conjunction with the post-cast outer reinforcing cage ring column.

[0014] Furthermore, a post-cast concrete layer is formed on the cushion layer, and an anchor bolt assembly for installation with the annular pedestal is pre-embedded in the post-cast concrete layer.

[0015] The beneficial effects of this technical solution are: The prefabricated support structure of this onshore wind turbine generator set uses a prefabricated annular column with a threaded inner steel reinforcement assembly formed on the inner surface to cooperate with the internal cast-in-place inner steel reinforcement cage column for construction and installation. The prefabricated annular column with a threaded outer steel reinforcement assembly formed on the outer surface to cooperate with the cast-in-place outer steel reinforcement cage column for construction. The overall structure is stable, the prefabricated construction is fast, the installation accuracy is high, and the construction efficiency is effectively improved, meeting the needs of large single-unit capacity wind turbines. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic cross-sectional view of the annular pedestal of this utility model; Figure 4 This is a schematic diagram showing the installation position of the prefabricated components of this utility model; Figure 5 This is a schematic diagram of the seam of this utility model; Figure 6 This is a schematic diagram of the rectangular steel bar arrangement of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1-Precast component; 2-Joint; 3-Post-cast inner steel cage column; 5-Anchor bolt assembly; 6-Rib beam; 7-Annular base plate; 8-Annular pedestal column; 9-Shear key structure; 10-Rectangular steel bar; 11-Steel sleeve; 12-Inner steel cage; 13-Outer annular steel cage; 14-Post-cast concrete layer; 15-Solid layer; 16-Post-cast outer steel cage annular column; 17-Radial steel bar; 81-Long steel bar; 82-Outer steel bar; 83-Medium-long steel bar; 84-Short steel bar. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-4 As shown in the embodiment of this application, an assembled support structure for an onshore wind turbine generator includes a cushion layer 15 (made of concrete), a post-cast inner steel cage column 3, a post-cast outer steel cage ring column 16, an annular column 8, and a precast component 1 arranged on the cushion layer 15; the precast component 1 forms circumferential support (circumferential direction) for the post-cast outer steel cage ring column 16, the inner surface of the annular column 8 is provided with a threaded inner steel bar assembly for use with the post-cast inner steel cage column 3, and the outer surface of the annular column 8 is provided with a threaded outer steel bar assembly for connection and installation with the post-cast outer steel cage ring column 16.

[0023] like Figure 1 , Figure 2As shown, the prefabricated support structure of the onshore wind turbine generator set in this technical solution is constructed by using a threaded inner steel reinforcement assembly formed on the inner surface of the prefabricated annular column 8 (which is installed using a prefabricated structure and forms an overall annular structure after assembly and installation) in conjunction with the internal post-cast inner steel reinforcement cage column 3 (the inner steel reinforcement cage 12 forms a reinforced concrete structure after concrete pouring). The threaded outer steel reinforcement assembly formed on the outer surface of the prefabricated annular column 8 is used in conjunction with the post-cast outer steel reinforcement cage annular column 16 (the outer annular steel reinforcement cage 13 forms a ring column reinforced concrete structure after concrete pouring). The overall structure is stable, the prefabricated construction is fast, the installation accuracy is high, and the construction efficiency is effectively improved, meeting the needs of large single-unit capacity wind turbines.

[0024] In this embodiment, the threaded inner sleeve steel bar assembly includes a long steel bar group, a medium-length steel bar group, and a short steel bar group disposed on the annular column 8. The long steel bar group is disposed on the upper part of the annular column, and the short steel bar group and the medium-length steel bar group are both arranged at the lower end of the long steel bar group, and the short steel bar group and the medium-length steel bar group are arranged alternately in the vertical direction.

[0025] like Figure 3 As shown, the long steel bar group, medium-length steel bar group, and short steel bar group have the same overall composition. They mainly include the column steel bars pre-embedded inside the annular column 8, the steel bar sleeves 11 fixedly installed at the ends of the column steel bars, and the steel bars fixedly connected to the steel bar sleeves (when setting the steel bar sleeves 11, the steel bar sleeves 11 can be pre-embedded inside the annular column 8. This design method is more convenient for demolding later. When using, you only need to screw the external steel bars into its interior). The long steel bar group is arranged at the uppermost position of the annular column 8. The corresponding short steel bar group and medium-length steel bar group are evenly distributed at equal intervals along the vertical height of the annular column 8, which is convenient to form an effective mechanical structure after subsequent pouring and meet the construction requirements.

[0026] In this embodiment, the long steel bar group includes a column steel bar fixedly installed in the annular column, a steel bar sleeve 11 fixedly installed at the end of the column steel bar, and a long steel bar 81. One end of the long steel bar 81 is connected and installed with the steel bar sleeve, and the other end of the long steel bar is installed with the post-cast inner steel cage column 3.

[0027] like Figure 1 , Figure 3As shown, the end of the rebar sleeve 11 is fixedly connected to the column rebar, and the long rebar 81 is fixedly connected to the rebar sleeve by thread. During use, the rebars at the corresponding positions on the upper part of the inner rebar cage 12 before pouring are tied and installed with the long rebar 81 to form an effective positioning installation. Since the short rebars 84 and medium-length rebars 83 are distributed at intervals along the vertical direction, the corresponding rebars protruding radially from the inner rebar cage 12 are also distributed in an alternating pattern of long and short rebars, with the short rebars 84 radially (i.e.,...) Figure 1 The long bars in the inner steel cage 12 are located in the horizontal direction, while the short bars in the inner steel cage 12 are located in the radial direction. This method makes the distribution of the internal steel bars more reasonable after subsequent pouring, and gives it stronger load-bearing capacity.

[0028] In this embodiment, multiple sets of long steel bars are provided, and the multiple sets of long steel bars are evenly distributed on the inner surface of the annular column 8.

[0029] Multiple sets of long steel bars are arranged along the inner surface of the annular column 8. Since the annular column 8 is a prefabricated structure, it is sufficient to ensure that each structural component of the annular column 8 is equipped with at least one set (two bars) of long steel bars. This ensures that the long steel bars and the inner steel cage 12 are installed together with each other, making the positioning more accurate and reliable. It also ensures that the inner steel cage 12 will not shift during the pouring of concrete.

[0030] In this embodiment, the threaded outer steel bar assembly includes multiple sets of parallel outer steel bar groups, and the multiple sets of outer steel bar groups and the long steel bar groups are set at the same vertical height.

[0031] like Figure 1 , Figure 3 As shown, the threaded outer steel bar assembly adopts the same structure as the long steel bar assembly, namely, it includes the column steel bar pre-embedded in the annular column 8, the steel bar sleeve 11 fixedly installed at the end of the column steel bar, and the outer steel bar 82 fixedly connected and installed in the steel bar sleeve 11. There are multiple sets of corresponding outer steel bar assemblies, which are used to cooperate with the outer annular steel bar cage 13 for binding and installation, and then concrete is poured to form an annular reinforced concrete structure. Since the outer annular steel bar cage 13 needs to be constructed in conjunction with the precast component 1, its outer steel bar assembly and the long steel bar assembly can be set at the same vertical height position to ensure the stability of the upper part of the outer steel bar assembly.

[0032] In this embodiment, the prefabricated component 1 is a plurality of prefabricated components 1 assembled into a circular support structure. The prefabricated component 1 includes an annular base plate 7 installed on the pad layer 15 and rib beams 6 formed on the annular base plate 7. The end face of the rib beams 6 is installed in conjunction with the post-cast outer steel cage ring column 16. (Of course, in actual production and use, when the prefabricated component is processed, the annular base plate 7, rib beams 6 and the internal annular pedestal column 8 can be made into an integrated structure. Using this method can further save construction time and improve efficiency.)

[0033] like Figure 1 , 2 As shown in Figure 4, multiple precast components 1 are assembled and installed to form a ring-shaped support structure. The ring-shaped base plate 7 is arranged on the pad layer 15 as the support base of the precast components 1. The rib beams 6 are installed vertically (along the vertical direction) on the ring-shaped base plate 7. The inner end face of the rib beams 6 is fixedly installed with the post-cast outer steel cage ring column 16 (which is tied with the inner outer ring steel cage 13 during construction and subsequently poured) to form an integral structure. After the precast components 1 are installed, their internal structure is effectively supported in the radial direction, ensuring the stability of their overall performance.

[0034] In this embodiment, a joint 2 is formed between two adjacent annular base plates 7. A rectangular steel bar 10 is pre-embedded in the annular base plate 7. The rectangular steel bar 10 protrudes from the end of the annular base plate 7 and extends into the joint 2. A radial steel bar 17 is installed in the rectangular steel bar 10.

[0035] like Figure 1 , 2 As shown in Figures 5 and 6, after the two adjacent annular base plates 7 are installed, a seam 2 will be formed between them, on both sides of the base plate (such as...). Figure 4 Rectangular steel bars 10 are pre-embedded on both the left and right sides. After the joint 2 is formed, the rectangular steel bars 10 are evenly distributed. At this time, the radial steel bars 17 are tied and installed in conjunction with the rectangular steel bars 10 to form a shape like... Figure 6 As shown in the installation method, four radial steel bars 17 are installed in the overlapping position between two adjacent rectangular steel bars 10. At this time, a steel cage structure along the radial direction is formed in the joint 2. Subsequent casting will form an effective connection structure.

[0036] In this embodiment, a shear key structure 9 is formed on the annular base plate 7, and the shear key structure 9 is evenly and equally distributed in the radial direction of the same annular base plate 7.

[0037] like Figure 5As shown, a shear key structure 9 is provided on the annular base plate 7, and the shear key structure 9 is evenly distributed in the radial direction (the shear key structure 9 and the rectangular steel bar 10 are not interlocked, and there is a certain gap between them). When the annular base plate 7 is poured, the design of the steel cage structure inside the joint 2 and the shear key structure 9 ensures the structural connection stability between the precast components 1 in the radial direction and the circumferential direction, and ensures the overall structural support is stable and reliable.

[0038] In this embodiment, the inner surface of the rib beam 6 is raised to form rib beam reinforcing bars, and the rib beam reinforcing bars are connected and installed in conjunction with the post-cast outer reinforcing cage ring column 16.

[0039] Rib beam 6 has radially protruding rib beam steel bars (not shown in the figure) on its inner surface. When rib beam 6 is prefabricated, the rib beam steel bars are embedded inside rib beam 6. After being tied together with the outer ring steel cage 13 inside the post-cast outer steel cage ring column 16, the casting is carried out to ensure the stability of the connection between the structures.

[0040] In this embodiment, a post-cast concrete layer 14 is formed on the cushion layer 15, and an anchor bolt assembly 5 for installation with the annular column 8 is pre-embedded in the post-cast concrete layer 14.

[0041] like Figure 1 As shown, after the inner steel cage 12 is installed on the foundation 15, the post-cast concrete layer 14 is poured. During the pouring, the lower end of the anchor bolt assembly 5 is pre-embedded. When the prefabricated annular column 8 is hoisted and installed, the anchor bolt holes reserved in the annular column 8 are used in conjunction with the anchor bolt assembly 5. After the subsequent components are installed and tied in place, the concrete is poured. The internal structure of the annular column 8 is then formed as a post-cast inner steel cage column 3. After the outer annular steel cage 13 between the annular column 8 and the rib beam 6 is tied and poured, it forms a post-cast outer steel cage annular column 16. All the structures form an integral structure. Large components adopt a prefabricated structure, and the connection between large components is constructed by coordinating the pouring of each structure. The overall structural performance is guaranteed, and the requirements of rapid construction, load-bearing capacity, and connection performance are also met.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated support structure for an onshore wind turbine generator set, characterized in that: It includes a cushion layer (15), a post-cast inner steel cage column (3) arranged on the cushion layer (15), a post-cast outer steel cage ring column (16), an annular column (8), and a precast component (1); the precast component (1) forms a circumferential support for the post-cast outer steel cage ring column (16), the inner surface of the annular column (8) is provided with a threaded inner steel bar assembly for use with the post-cast inner steel cage column (3), and the outer surface of the annular column (8) is provided with a threaded outer steel bar assembly for connection and installation with the post-cast outer steel cage ring column (16).

2. The prefabricated support structure for onshore wind turbine generators according to claim 1, characterized in that: The threaded inner sleeve steel bar assembly includes a long steel bar group, a medium-length steel bar group and a short steel bar group set on the annular column (8). The long steel bar group is set on the upper part of the annular column (8), and the short steel bar group and the medium-length steel bar group are arranged at the lower end of the long steel bar group and are arranged alternately in the vertical direction.

3. The prefabricated support structure for onshore wind turbine generators according to claim 2, characterized in that: The long steel bar group includes a column steel bar fixedly installed in the annular column (8), a steel bar sleeve (11) fixedly installed at the end of the column steel bar, and a long steel bar (81). One end of the long steel bar (81) is connected and installed with the steel bar sleeve (11), and the other end of the long steel bar (81) is installed with the post-cast inner steel cage column (3).

4. The prefabricated support structure for onshore wind turbine generators according to claim 2, characterized in that: The long steel bar group is provided in multiple groups, and the multiple groups of long steel bar groups are evenly distributed on the inner surface of the annular column (8).

5. The prefabricated support structure for onshore wind turbine generators according to claim 2, characterized in that: The threaded outer steel bar assembly includes multiple sets of parallel outer steel bar groups, which are arranged at the same vertical height as the long steel bar groups.

6. The prefabricated support structure for onshore wind turbine generators according to claim 1, characterized in that: The prefabricated component (1) is a circular support structure formed by assembling multiple prefabricated components (1). The prefabricated component (1) includes an annular base plate (7) installed on the cushion layer (15) and a rib beam (6) formed on the annular base plate (7). The end face of the rib beam (6) is fitted with a post-cast outer steel cage ring column (16) for installation.

7. The prefabricated support structure for onshore wind turbine generators according to claim 6, characterized in that: A joint (2) is formed between two adjacent annular base plates (7). A rectangular steel bar (10) is pre-embedded in the annular base plate (7). The rectangular steel bar (10) protrudes from the end of the annular base plate (7) and extends into the joint (2). A radial steel bar (17) is installed in the rectangular steel bar (10).

8. The prefabricated support structure for onshore wind turbine generators according to claim 7, characterized in that: A shear key structure (9) is formed on the annular base plate (7), and the shear key structure (9) is evenly and equally distributed in the radial direction of the same annular base plate (7).

9. The prefabricated support structure for onshore wind turbine generators according to claim 8, characterized in that: The inner surface of the rib (6) is raised to form rib reinforcement bars, which are connected and installed in conjunction with the post-cast outer reinforcement cage ring column (16).

10. The prefabricated support structure for onshore wind turbine generators according to claim 1, characterized in that: A post-cast concrete layer (14) is formed on the cushion layer (15), and an anchor bolt assembly (5) for installation with the annular column (8) is pre-embedded in the post-cast concrete layer (14).

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