Novel lattice type wind power generation tower

Abstract

The utility model discloses a novel lattice type wind power generation tower, which relates to the technical field of wind power generation and comprises a tower main body, the tower main body consists of a plurality of upright posts, a plurality of layers of transverse web members and a plurality of inclined web members, the stand column is sequentially divided into a lower lattice structure section, an inclined-to-straight section and an upper lattice structure section from bottom to top, a conversion section is fixedly installed at the top of the upper lattice structure section, a pure steel tower drum is fixedly installed at the top of the conversion section, and an annular bracket is installed at the bottom end of the stand column. According to the design scheme, the annular bracket is installed at the bottom end of the stand column and used for fixing the steel strand, the bottom of the steel strand is not anchored to the foundation any more, and the foundation does not need to be reserved with a prestress anchoring hole and an operation manhole, so that the foundation design height is greatly reduced, the foundation material consumption is reduced, and the construction cost is reduced. And the overall manufacturing cost of the foundation is relatively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a novel lattice type wind power tower. Background Art

[0002] Wind energy is a renewable energy source with rich resources, clean and pollution-free. Wind power generation has become the fastest-growing energy in the world in recent years, and the wind power generation industry has also become a new industry with broad prospects. As an important component of a wind turbine generator set, the tower not only has to support the weight of the wind turbine, but also withstand the wind pressure blowing on the wind turbine and the tower, as well as the dynamic load in the wind turbine generator. Its design level directly affects the working performance and reliability of the wind turbine generator.

[0003] The existing onshore lattice type wind power tower is generally straight-line type. The four main load-bearing columns of the lattice structure are installed and built layer by layer from the bottom to the conversion end at a unified angle. A pure steel tower barrel is installed above the conversion end. Due to the limitation of the tip distance of the wind turbine blades, the height of the lattice structure part of this straight-line type lattice structure will be limited to a certain extent, resulting in low economy of the overall tower. In addition, the main load-bearing columns of the lattice structure are generally pure steel columns or concrete-filled steel tube columns. Under the condition of the same steel consumption, the bearing capacity of pure steel columns is not as good as that of concrete-filled steel tube columns. When using concrete-filled steel tube columns, the fatigue performance of the concrete needs to be considered, and prestress is applied to the lattice structure columns. Generally, the upper part of the prestress is anchored to the conversion section, and the lower part is anchored to the foundation. Due to the need for tensioning operation, the foundation needs to reserve a relatively high manhole height, which greatly increases the foundation height and the consumption of concrete, resulting in an increase in the material consumption and cost of the foundation. Content of the Utility Model

[0004] In order to overcome the above-mentioned defects existing in the prior art, the utility model provides a novel lattice type wind power tower.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a novel lattice type wind power tower, including a tower main body. The tower main body is composed of a plurality of columns, multiple layers of transverse web members and a plurality of diagonal web members. The columns adopt a segmented structure. The columns are successively divided into a lower lattice structure section, an inclined-to-straight section and an upper lattice structure section from bottom to top. The top of the upper lattice structure section is fixedly installed with a conversion section. The top of the conversion section is fixedly installed with a pure steel tower barrel. The bottom end of the column is provided with an annular corbel, and a plurality of groups of steel strands are anchored and installed on the annular corbel. The upper ends of the steel strands are installed on the conversion section.

[0006] Furthermore, the top end of the lower lattice structure section inclines towards the center of the tower body, with an inclination angle of 3 - 8 degrees. An inclined-to-straight section is fixedly installed at the top end of the lower lattice structure section. The top end of the inclined-to-straight section inclines towards the center of the tower body, with an inclination angle of 3 - 8 degrees. An upper lattice structure section is fixedly installed at the top end of the inclined-to-straight section, and the upper lattice structure section extends vertically upwards.

[0007] Furthermore, the inside of the column is filled with concrete.

[0008] Furthermore, several groups of the steel strands are arranged closely along the edge of the column. Guide seats corresponding to the steel strands are fixedly installed on the outer wall of the column, and the guide seats are evenly arranged in an array on the column.

[0009] Furthermore, the conversion section is of a conical structure. A connecting bracket is fixedly installed on the column at the bottom end of the conversion section, and the steel strands are anchored and installed on the connecting bracket.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. In the design scheme of the present utility model, by designing the column in a broken line shape and considering the requirement of meeting the tip clearance of the wind turbine blade at the turning point, the main part of the tower body can be made higher under the same hub height, reducing the height of the pure steel tower barrel, reducing the manufacturing cost of the tower, and since the conversion section is placed at a higher height, the load borne by the conversion section is reduced, the material consumption of the conversion section can be reduced, and the overall economy of the tower is improved.

[0012] 2. In the design scheme of the present utility model, by designing the bottom end of the column with an annular bracket for fixing the steel strands, while ensuring that the whole tower body is prestressed and constrained, since the bottom of the steel strands is no longer anchored to the foundation, the foundation does not need to reserve prestressed anchoring holes and manholes for operation, greatly reducing the design height of the foundation, reducing the material consumption of the foundation, and relatively reducing the overall cost of the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below with reference to the drawings and embodiments.

[0014] Figure 1 is the front view of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the lower lattice structure section of the present utility model;

[0016] Figure 3 is the transverse structural schematic diagram of the tower body of the present utility model.

[0017] In the figure: 1. Tower main body, 2. Column, 21. Lower lattice structure section, 22. Oblique-to-straight section, 23. Upper lattice structure section, 3. Horizontal web member, 4. Diagonal web member, 5. Transition section, 6. Pure steel tower barrel, 7. Connecting corbel, 8. Ring corbel, 9. Steel strand, 10. Concrete, 11. Guide seat. Detailed implementation manners

[0018] In order to more clearly illustrate the technical solution of the present utility model, the present utility model will be further described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only one embodiment of the present utility model. For those of ordinary skill in the art, without creative efforts, other embodiments obtained based on this drawing and embodiment all fall within the protection scope of the present utility model.

[0019] According to Figures 1-3 As shown, a novel lattice type wind power tower includes a tower main body 1, and the tower main body 1 is composed of a plurality of columns 2, multiple layers of horizontal web members 3 and a plurality of diagonal web members 4. The column 2 adopts a segmented structure, and the column 2 is successively divided into a lower lattice structure section 21, an oblique-to-straight section 22 and an upper lattice structure section 23 from bottom to top. The top of the upper lattice structure section 23 is fixedly installed with a transition section 5 through bolts. The top of the transition section 5 is fixedly installed with a pure steel tower barrel 6. A ring corbel 8 is welded on the outer wall of the bottom end of the column 2, and several groups of steel strands 9 are anchored and installed on the ring corbel 8. The upper ends of the steel strands 9 are arranged and installed on the transition section 5.

[0020] In this embodiment, the top end of the lower lattice structure section 21 inclines towards the center of the tower main body 1, and the inclination angle is 3 - 8 degrees. The top end of the lower lattice structure section 21 is fixedly installed with an oblique-to-straight section 22 through bolts. The top end of the oblique-to-straight section 22 inclines towards the center of the tower main body 1, and the inclination angle is 3 - 8 degrees. The top end of the oblique-to-straight section 22 is fixedly installed with an upper lattice structure section 23 through bolts. The upper lattice structure section 23 is vertically upward. The segmented connection part of the column 2 is a flange structure. In order to ensure the reliability of the flange connection, several groups of reinforcing ribs (not shown in the figure) are circumferentially welded at the connection part of the flange and the steel pipe. In order to improve the stability of the installation of the tower main body 1, the width of the bottom of the tower main body 1 is increased through the lower lattice structure section 21, and it is smoothly transitioned to the upper lattice structure section 23 through the oblique-to-straight section 22. The upper lattice structure section 23 replaces part of the pure steel tower barrel 6 to reduce the height of the pure steel tower barrel 6, thereby reducing the manufacturing cost of the tower. Concrete 10 is poured inside the column 2 to improve the bearing capacity and plastic performance of the column 2.

[0021] In this embodiment, several groups of the steel strands 9 are arranged closely along the edge of the column 2. The number of the steel strands 9 is two groups or four groups. A guiding seat 11 corresponding to the steel strands 9 is welded on the outer wall of the column 2. The guiding seats 11 are evenly arranged in an array on the column 2. The guiding seats 11 keep a certain distance between the steel strands 9 and the column 2, and the steel strands 9 form a fold angle at the bending part of the column 2. The conversion section 5 is of a conical structure. A connecting bracket 7 is welded on the column 2 at the bottom end of the conversion section 5. The steel strands 9 are anchored and installed on the connecting bracket 7. The overall tower column 2 is guaranteed to be prestressed and constrained by the external prestressing method.

[0022] When the utility model is in use, the wind power main engine base is installed at the top end of the pure steel tower barrel 6 through flange connection. The inclined-to-straight section 22 is not higher than the height of the wind turbine blade tip. Part of the pure steel tower barrel 6 is replaced by the upper lattice structure section 23 to reduce the height of the pure steel tower barrel 6, thereby reducing the manufacturing cost of the tower. The bottom end of the steel strand 9 is anchored and installed on the annular bracket 8. While ensuring that the overall tower column 2 is prestressed and constrained, since the bottom of the steel strand 9 is no longer anchored to the foundation, the foundation does not need to reserve prestressed anchor holes and operator holes, greatly reducing the design height of the foundation, reducing the amount of foundation materials used, and relatively reducing the overall cost of the foundation.

[0023] The above embodiments are only exemplary embodiments of the utility model and are not used to limit the utility model. The protection scope of the utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the utility model within the essence and protection scope of the utility model, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the utility model.

Claims

1. A new lattice-type wind power tower, comprising a tower main body (1), wherein the tower main body (1) is composed of a plurality of columns (2), multiple layers of transverse web members (3) and a plurality of diagonal web members (4), and is characterized in that: The column (2) adopts a segmented structure. The column (2) is successively divided into a lower lattice structure section (21), an inclined-to-straight section (22), and an upper lattice structure section (23) from bottom to top. A conversion section (5) is fixedly installed at the top of the upper lattice structure section (23). A pure steel tower barrel (6) is fixedly installed at the top of the conversion section (5). An annular corbel (8) is installed at the bottom end of the column (2). A number of groups of steel strands (9) are anchored and installed on the annular corbel (8). The upper ends of the steel strands (9) are installed on the conversion section (5).

2. A novel lattice-type wind power tower according to claim 1, characterized in that, The top end of the lower lattice structure section (21) inclines towards the center of the tower main body (1), and the inclination angle is 3 - 8 degrees. The top end of the lower lattice structure section (21) is fixedly installed with the inclined-to-straight section (22). The top end of the inclined-to-straight section (22) inclines towards the center of the tower main body (1), and the inclination angle is 3 - 8 degrees. The top end of the inclined-to-straight section (22) is fixedly installed with the upper lattice structure section (23). The upper lattice structure section (23) is vertically upward.

3. A novel lattice-type wind power tower according to claim 2, characterized in that, Concrete (10) is poured inside the column (2).

4. A novel lattice type wind power tower according to claim 1, characterized in that, A number of groups of the steel strands (9) are arranged close to the edge of the column (2). Guide seats (11) corresponding to the steel strands (9) are fixedly installed on the outer wall of the column (2). The guide seats (11) are evenly arranged in an array on the column (2).

5. A novel lattice type wind power tower according to claim 4, characterized in that, The conversion section (5) is of a conical structure. A connecting corbel (7) is fixedly installed on the column (2) at the bottom end of the conversion section (5). The steel strands (9) are anchored and installed on the connecting corbel (7).

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