Prestress cylindrical surface reticulated shell fan structure

Abstract

The invention provides a prestressed cylindrical reticulated shell fan structure, which relates to the technical field of wind power structure engineering and comprises a foundation, a prestressed cylindrical reticulated shell tower drum is arranged on the foundation, a vertical generator set is arranged at the top of the prestressed cylindrical reticulated shell tower drum, and vertical fan blades are arranged on the vertical generator set; the prestressed cylindrical reticulated shell tower drum comprises a cylindrical reticulated shell cross beam, the two ends of the cylindrical reticulated shell cross beam are each connected with a cylindrical reticulated shell inclined column, the ends, away from the cylindrical reticulated shell cross beam, of the two cylindrical reticulated shell inclined columns are connected with each other to form a triangular mesh unit, and the triangular mesh units are arranged in the circumferential direction and connected with each other. A plurality of prestressed tendons are arranged around the prestressed cylindrical reticulated shell tower drum, and the head ends and the tail ends of the prestressed tendons are anchored at the top end and the bottom end of the prestressed cylindrical reticulated shell tower drum respectively. According to the fan tower, the inclined columns and the annular beams are adopted to form the triangular-prism-shaped latticed shell structure, so that the lateral stiffness of the fan tower is improved, and deformation of the fan tower is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power structure engineering, in particular to a prestressed cylindrical reticulated shell wind turbine structure. Background Art

[0002] With the development of new energy technologies, the available land resources for wind power generation are decreasing. To improve the power generation efficiency of wind power, the tower height of wind turbines can be increased to obtain higher power generation efficiency. Due to the limited height of traditional single-tube tower wind turbines, their construction height is not greater than 120m. Therefore, it is necessary to change the structural form of wind power towers to break through higher heights to meet higher power generation efficiency. The patent "A Light Steel-Concrete Prestressed Composite Wind Power Tower Barrel Section and Its Wind Power Tower" (CN113374646A) includes several spliced arc-shaped precast tower barrel sections. Each precast tower barrel section includes an arc-shaped plate and light steel pipes fixedly installed on both the upper and lower sides of the arc-shaped plate. Stress holes for passing prestressing tendons are provided on the arc-shaped end faces of the light steel pipes. Each arc-shaped plate includes a curved corrugated steel plate, a steel mesh arranged on both sides of the corrugated steel plate, and concrete poured outside the steel mesh. Through holes are provided on the corrugated steel plate to facilitate the mutual flow of concrete on both sides of the corrugated steel plate. A fastening device is fixedly installed between adjacent precast tower barrel sections, which mainly uses concrete. Concrete components are heavy, and the transportation cost is inconvenient and relatively high. The patent "An Assembled Prestressed Lattice Steel Tube Concrete Hybrid Wind Turbine Tower" (CN208633991 U) includes a wind turbine, an upper tower barrel, a circular steel box girder, a lattice tower, and a foundation. The uppermost horizontal member of the lattice tower is replaced by a circular steel box girder. One wind turbine is arranged on the upper tower barrel. The lattice tower is a lattice column, and its limb members are prestressed steel tube concrete, using the post-tensioning method. The limb members can be segmented according to their length, and flange connections are used between segments. It uses steel tube concrete and prestress respectively. Steel tube concrete components are relatively large, and the requirements for prestress construction are relatively high. Summary of the Invention

[0003] The present invention provides a prestressed cylindrical reticulated shell wind turbine structure, aiming to solve at least one technical problem existing in the prior art mentioned in the background art.

[0004] The present invention provides the following technical solutions to achieve the above object:

[0005] A prestressed cylindrical reticulated shell wind turbine structure includes a foundation, a prestressed cylindrical reticulated shell tower barrel is arranged on the foundation, a vertical generator set is arranged at the top of the prestressed cylindrical reticulated shell tower barrel, and a vertical wind turbine blade is arranged on the vertical generator set;

[0006] The prestressed cylindrical reticulated shell tower barrel includes cylindrical reticulated shell cross beams. One end of each cylindrical reticulated shell cross beam is connected to a cylindrical reticulated shell inclined column. The ends of the two cylindrical reticulated shell inclined columns away from the cylindrical reticulated shell cross beam are connected to each other to form a triangular grid unit. A number of triangular grid units are arranged circumferentially and connected to each other. A number of prestressed tendons are arranged around the prestressed cylindrical reticulated shell tower barrel, and the head and tail ends of the prestressed tendons are respectively anchored at the top and bottom ends of the prestressed cylindrical reticulated shell tower barrel.

[0007] Furthermore, the cylindrical reticulated shell cross beams are arranged circumferentially and connected head to tail to form a regular polygon structure at one layer. The two cylindrical reticulated shell inclined columns corresponding to each cylindrical reticulated shell cross beam are of equal length to form a triangular grid unit with an isosceles triangle structure. The connection points where the two cylindrical reticulated shell inclined columns are connected correspond to and are connected to the vertices of another layer of regular polygon structure.

[0008] Furthermore, the number of the prestressed tendons provided is matched with the number of vertices of the regular polygon structure.

[0009] Furthermore, the triangular grid units are connected to each other through cast steel joints, and the cast steel joints are of an X-shaped structure.

[0010] Furthermore, the head end of the prestressed tendon is anchored at the vertex of the highest layer of regular polygon structure, and passes through the cylindrical reticulated shell cross beam and the cast steel joint in sequence from high to low until the tail end is anchored in the foundation.

[0011] Furthermore, the two transverse ends of the cast steel joint are connected to the cylindrical reticulated shell cross beam, the two diagonal ends of the cast steel joint are connected to the cylindrical reticulated shell inclined column, and a prestressed tendon duct is vertically penetrated through the cast steel joint.

[0012] Furthermore, the size of the regular polygon structure gradually increases from high to low.

[0013] Furthermore, flange plates are arranged on the connection surfaces of the cast steel joint with the cylindrical reticulated shell inclined column and the cylindrical reticulated shell cross beam.

[0014] Furthermore, a number of flange stiffening plates are arranged circumferentially on the flange plate.

[0015] Furthermore, the flange plates are connected by high-strength bolts.

[0016] Advantageous Effects

[0017] Compared with the prior art, the present invention has the following advantageous effects:

[0018] 1. The tower of the present invention adopts a triangular columnar reticulated shell structure composed of inclined columns and a circular beam, so as to improve the lateral stiffness of the wind turbine tower, reduce the deformation of the wind turbine tower, and at the same time, the triangular columnar reticulated shell structure can effectively reduce the wind load receiving area, thereby reducing the influence of the wind load on the structure. Secondly, all components are bolt-connected, which can reduce the transportation of large components and achieve lightweight transportation and installation of components. The use of concrete-filled steel tubular columns can achieve the purpose of saving steel consumption. The triangular columnar reticulated shell structure can achieve a breakthrough in the height of the wind turbine tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a partial enlarged view of the prestressed cylindrical reticulated shell tower barrel of the present invention;

[0021] Figure 3 is a partial schematic diagram of the connection of the prestressed cylindrical reticulated shell tower barrel of the present invention;

[0022] Figure 4 is a schematic diagram of the connection structure of the cast steel node of the present invention;

[0023] Reference numerals: 1 - vertical wind turbine blade; 2 - vertical generator set; 3 - prestressed cylindrical reticulated shell tower barrel; 4 - foundation; 5 - inclined column of the cylindrical reticulated shell; 6 - cross beam of the cylindrical reticulated shell; 7 - prestressed tendon; 8 - cast steel node; 9 - prestressed tendon duct; 10 - flange; 11 - flange stiffening plate; 12 - high-strength bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs; the terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Embodiment. A prestressed cylindrical reticulated shell fan structure, with the structure reference Figures 1 to 4 , including a foundation 4, on which a prestressed cylindrical reticulated shell tower barrel 3 is provided. At the top of the prestressed cylindrical reticulated shell tower barrel 3, a vertical generator set 2 is provided, and on the vertical generator set 2, a vertical fan blade 1 is provided;

[0028] The prestressed cylindrical reticulated shell tower barrel 3 includes cylindrical reticulated shell cross beams 6. At both ends of each cylindrical reticulated shell cross beam 6, a cylindrical reticulated shell inclined column 5 is connected. The ends of the two cylindrical reticulated shell inclined columns 5 away from the cylindrical reticulated shell cross beam 6 are connected to each other to form a triangular grid unit. A number of triangular grid units are arranged circumferentially and connected to each other. A number of prestressed tendons 7 are arranged around the prestressed cylindrical reticulated shell tower barrel 3, and the head and tail ends of the prestressed tendons 7 are respectively anchored at the top and bottom ends of the prestressed cylindrical reticulated shell tower barrel 3.

[0029] The cylindrical reticulated shell cross beams 6 are arranged circumferentially and connected end to end to form a regular polygon structure of one layer. The two cylindrical reticulated shell inclined columns 5 corresponding to each cylindrical reticulated shell cross beam 6 are of equal length and form a triangular grid unit of an isosceles triangle structure. The connection points where the two cylindrical reticulated shell inclined columns 5 are connected correspond to the vertices of another regular polygon structure.

[0030] The number of the prestressed tendons 7 provided is matched with the number of vertices of the regular polygon structure.

[0031] The triangular grid units are connected to each other through cast steel joints 8, and the cast steel joints 8 are of an X-shaped structure. The two horizontal ends of the cast steel joint 8 are connected to the cylindrical reticulated shell cross beam 6, the two inclined ends of the cast steel joint 8 are connected to the cylindrical reticulated shell inclined column 5, and a prestressed tendon duct 9 is vertically penetrated through the cast steel joint 8.

[0032] The head end of the prestressed tendon 7 is anchored at the vertex of the highest-layer regular polygon structure, and successively passes through the cylindrical reticulated shell cross beam 6 and the cast steel joint 8 from high to low until the tail end is anchored in the foundation 4.

[0033] The regular polygon structure is set to gradually increase in size from high to low. By setting the regular polygon structure to gradually increase in size from high to low to form a tower-shaped structure with a small top and a large bottom, the wind resistance performance of this prestressed cylindrical reticulated shell fan structure is improved.

[0034] Flange plates 10 are provided on the connection surfaces of the cast steel joint 8 with the cylindrical reticulated shell inclined column 5 and the cylindrical reticulated shell cross beam 6. A number of flange stiffening plates 11 are arranged circumferentially on the flange plates 10. The flange plates 10 are connected by high-strength bolts 12. By providing the flange plates 10 and using high-strength bolts 12 for connection, it is convenient to carry out the installation work of the entire prestressed cylindrical reticulated shell fan structure; by providing the flange stiffening plates 11, the self-strength of the flange plates 10 is improved to ensure the stability of the connection.

[0035] Obviously, the above are only some embodiments of the present invention, rather than all embodiments. The above embodiments are not intended to limit the present invention, and various changes and modifications can be made to the present invention for those skilled in the art. Any combination, modification, equivalent replacement, improvement and all other embodiments that can be made by ordinary technical personnel in the art within the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A prestressed cylindrical lattice shell fan structure, characterized in that: It comprises a foundation (4), a prestressed cylindrical lattice shell tower (3) is arranged on the foundation (4), a vertical generator set (2) is arranged on the top of the prestressed cylindrical lattice shell tower (3), and vertical fan blades (1) are arranged on the vertical generator set (2); The prestressed cylindrical lattice shell tower (3) comprises a cylindrical lattice shell cross beam (6), each end of the cylindrical lattice shell cross beam (6) is connected to a cylindrical lattice shell inclined column (5), and the ends of the two cylindrical lattice shell inclined columns (5) away from the cylindrical lattice shell cross beam (6) are connected to each other to form a triangular grid unit, and a plurality of triangular grid units are arranged circumferentially and connected to each other. A plurality of prestressed tendons (7) are arranged around the prestressed cylindrical lattice shell tower (3), and the head and tail ends of the prestressed tendons (7) are respectively anchored at the top and bottom ends of the prestressed cylindrical lattice shell tower (3).

2. The prestressed cylindrical lattice shell fan structure according to claim 1 is characterized in that: The cylindrical lattice shell cross beams (6) are arranged circumferentially and connected end to end to form a regular polygon structure; two cylindrical lattice shell oblique columns (5) corresponding to each cylindrical lattice shell cross beam (6) are arranged with equal length to form a triangular grid unit of an isosceles triangle structure; the connection point between the two cylindrical lattice shell oblique columns (5) corresponds to the vertex of another regular polygon structure.

3. The prestressed cylindrical lattice shell fan structure according to claim 1 is characterized in that: The number of prestressed tendons (7) is matched with the number of vertices of the regular polygon structure.

4. The prestressed cylindrical lattice shell fan structure according to claim 1 is characterized in that: The triangular grid units are connected to each other via cast steel nodes (8), and the cast steel nodes (8) are of a cross-shaped structure.

5. The prestressed cylindrical lattice shell fan structure according to claim 4 is characterized in that: The head end of the prestressed tendon (7) is anchored on the vertex of the highest regular polygonal structure, and passes through the cylindrical lattice shell cross beam (6) and the cast steel node (8) in sequence from high to low, until the tail end is anchored in the foundation (4).

6. The prestressed cylindrical lattice shell fan structure according to claim 4 is characterized in that: The two transverse ends of the cast steel node (8) are connected to the cylindrical lattice shell cross beam (6), the two oblique ends of the cast steel node (8) are connected to the cylindrical lattice shell oblique columns (5), and a prestressed tendon pipe (9) is vertically penetrated through the cast steel node (8).

7. The prestressed cylindrical lattice shell fan structure according to claim 2 is characterized in that: The regular polygonal structure is arranged with gradually increasing size from high to low.

8. The prestressed cylindrical lattice shell fan structure according to claim 1 is characterized in that: A flange plate (10) is provided on the connection surface between the cast steel node (8) and the cylindrical lattice shell inclined column (5) and the cylindrical lattice shell cross beam (6).

9. The prestressed cylindrical lattice shell fan structure according to claim 8, characterized in that: A plurality of flange stiffening plates (11) are arranged circumferentially on the flange plate (10).

10. The prestressed cylindrical lattice shell fan structure according to claim 8, characterized in that: The flange (10) is connected via high-strength bolts (12).

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