Wind power tower and construction method thereof

Abstract

The present application relates to wind power structure tower drum technical field, disclose a kind of wind power tower drum and its construction method, comprising: tower drum and tower, the tower includes pipe column and multiple beams, the pipe column includes: filling portion and multiple column, the column is hollow, and multiple the column is sequentially arranged along vertical, one is equipped between the two adjacent column The beam is equipped with through-hole on the beam, the two adjacent column is inserted into the through-hole to realize the connection with the beam, and the middle part of each column is sequentially communicated to form hollow cavity, the filling portion is filled in the hollow cavity, the column includes support portion and steel reinforcement cage embedded in the support portion, the support portion is UHPC cast piece, the filling portion is ordinary concrete piece, recycled concrete piece or high-strength concrete piece, the tower drum is connected to the top side of the topmost beam, so that the bending stiffness of wind power tower drum increases, improves its service life and construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind power structure tower technology, and in particular to a wind power tower. Background Technology

[0002] Currently, my country's power grid construction is developing rapidly, and its power infrastructure is constantly improving. However, with the continuous expansion of the power grid, the size of wind turbine towers is increasing, and the service environment they face is becoming increasingly complex. This places higher demands on the life-cycle performance of wind turbine towers. Therefore, there is an urgent need for a wind turbine tower with high bending stiffness, long service life, good economic performance, and high construction efficiency to meet the needs of engineering projects. Summary of the Invention

[0003] The purpose of this invention is to provide a wind turbine tower and its construction method, which increases the bending stiffness of the wind turbine tower, extends its service life, reduces steel consumption, has good economic performance, and high construction efficiency.

[0004] To achieve the above objectives, the present invention provides a wind turbine tower, comprising: a tower tube and a tower frame, the tower frame including a pipe column and multiple crossbeams, the pipe column including: a filling part and multiple columns, the columns being hollow, and the multiple columns being arranged vertically in sequence, a crossbeam being provided between two adjacent columns, the crossbeam having a through hole, two adjacent crossbeams being respectively inserted into the through hole to achieve connection with the crossbeam, and the middle parts of each column being sequentially connected to form a hollow cavity, the filling part filling the hollow cavity;

[0005] The column includes a support part and a steel cage embedded in the support part. The support part is a UHPC (Ultra-High Performance Concrete) cast-in-place component, and the filling part is an ordinary concrete component, a recycled concrete component, or a high-strength concrete component.

[0006] The tower is connected to the top side of the crossbeam located at the very top.

[0007] Preferably, the column further includes: prestressing tendons and anchoring ends, wherein the prestressing tendons vertically pass through the hollow cavity and are embedded in the filling part, the top of the prestressing tendons passes through the through hole of the topmost crossbeam, and the anchoring ends are connected to the top of the prestressing tendons and connected to the crossbeam.

[0008] Preferably, at least one of the columns is provided with a pumping hole communicating with the hollow cavity.

[0009] Preferably, the column comprises at least segmented columns connected sequentially along the longitudinal direction.

[0010] Preferably, the top and / or bottom of the segmented column has a connector, and two adjacent segmented columns are connected by the connector.

[0011] Preferably, the crossbeam is in the shape of a triangular grid, and correspondingly, three columns are provided, which are respectively connected to each corner of the crossbeam.

[0012] Preferably, the tower is a steel component and the crossbeam is a concrete component.

[0013] Preferably, the bottom of the tower is provided with a connecting plate, which is connected to the topmost crossbeam by fasteners.

[0014] To address the same technical problem, the present invention also provides a construction method for the wind turbine tower, comprising the following steps:

[0015] The construction tower is constructed by connecting prefabricated support parts sequentially through connectors to form columns. The columns are then passed through the through holes of each crossbeam to connect the columns to each crossbeam, thus creating a hollow cavity through which the interiors of each column are connected. Concrete is pumped into the hollow cavity, and once the cavity is filled with concrete, a filling section is formed, completing the construction of the tower.

[0016] The bottom of the tower is installed on the topmost crossbeam of the constructed tower frame.

[0017] Before the step of pumping concrete into the hollow cavity, the method further includes:

[0018] A prestressing system is provided, the prestressing system including an anchor end and a prestressing tendon connected to the anchor end, the anchor end is fixed in the through hole of the crossbeam at the top of the tower, and the prestressing tendon passes vertically through the hollow cavity.

[0019] After the concrete fills the hollow cavity to form the filling part, the prestressing tendons are embedded in the filling part.

[0020] Compared with the prior art, the wind turbine tower and its construction method according to embodiments of the present invention have the following advantages:

[0021] 1. Includes a tower and a tower tube fixed on the tower. The columns in the tower include multiple columns and a filling part. The multiple columns are connected by crossbeams, and the columns are set as hollow structures with embedded steel cages. The columns are made of UHPC, and the filling part is concrete filled in each column. This structure increases the bending stiffness, extends the service life, and reduces the amount of steel used, resulting in good economic performance.

[0022] 2. The columns can be prefabricated in advance, and the prefabricated columns and beams can be fixed and installed on site before the filling part is poured on site, which can greatly speed up the construction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a wind turbine tower according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the connection between the connecting plate and the crossbeam according to an embodiment of the present invention;

[0025] Figure 3 This is an enlarged view of the through hole in the beam according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the tubular column structure according to an embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional enlarged view of the tubing column according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the prestressed tendons and anchorage ends according to an embodiment of the present invention.

[0029] In the diagram, 1 is the tower tube; 2 is the tower frame; 21 is the pipe column; 211 is the hollow cavity; 212 is the filling part; 213 is the column body; 2131 is the support part; 2132 is the reinforcing cage; 2132a is the stirrup; 2132b is the longitudinal reinforcement; 2133 is the segmented column body; 2133a is the plug joint; 214 is the prestressed tendon; 215 is the anchoring end; 216 is the pumping hole; 22 is the crossbeam; 221 is the through hole; 2211 is the enlarged hole; and 23 is the connecting plate. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," etc., used in this invention to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0032] like Figure 1 and Figure 4As shown, a preferred embodiment of the wind turbine tower of the present invention includes: a tower 1 and a tower frame 2. The tower frame 2 includes a pipe column 21 and multiple crossbeams 22. The pipe column 21 includes: a filling part 212 and multiple columns 213. The columns 213 are hollow, and the multiple columns 213 are arranged vertically in sequence. A crossbeam 22 is provided between two adjacent columns 213. A through hole 221 is opened on the crossbeam 22. Two adjacent crossbeams 22 are respectively inserted into the through hole 221 to realize the connection between them. The middle parts of each column 213 are connected in sequence to form a hollow cavity 211. The filling part 212 fills the hollow cavity 211.

[0033] The column 213 includes a support portion 2131 and a reinforcing cage 2132 embedded in the support portion 2131. The support portion 2131 is a UHPC cast-in-place component, and the filling portion 212 is a conventional concrete component, a recycled concrete component, or a high-strength concrete component. Figure 5 As shown, the steel cage 2132 includes multiple stirrups 2132a and multiple longitudinal bars 2132b. The stirrups 2132a are arranged at intervals along the longitudinal direction of the column 213, and the longitudinal bars 2132b are arranged at intervals along the circumference of the stirrups 2132a.

[0034] The tower 1 is connected to the top side of the crossbeam 22 located at the very top.

[0035] Based on the above technical solution, the support part 2131 is a UHPC casting component, which can utilize the excellent durability of UHPC material to achieve a longer service life of the structure. The tower 1 is connected to the top side of the crossbeam 22 located at the top, combining traditional tower technology with UHPC material, so that the wind turbine tower has greater bending stiffness and reduces the amount of steel structure used, which is economical. The column 213 can be prefabricated in advance, and after the prefabricated column 213 and crossbeam 22 are fixed and installed on site, the filling part 212 is poured on site, which can greatly speed up the construction speed.

[0036] like Figure 6 As shown, the column 21 further includes a prestressing tendon 214 and an anchoring end 215. The prestressing tendon 214 passes vertically through the hollow cavity 211 and is embedded in the filling part 212. The top of the prestressing tendon 214 passes through the through hole 221 of the topmost crossbeam 22, and the anchoring end 215 is connected to the top of the prestressing tendon 214 and connected to the crossbeam 22. The column 21 and the crossbeam 22 are stably connected by the provided pre-tension force, which further improves the bending stiffness.

[0037] Specifically, in some embodiments, at least one of the columns 213 is provided with a pumping hole 216 communicating with the hollow cavity 211, so as to pump concrete into the hollow cavity 211.

[0038] For example, the aforementioned pumping holes are provided at the bottom of the outer periphery of each column.

[0039] In some preferred embodiments, the column 213 includes at least longitudinally connected segmented columns 2133, which facilitates prefabrication, installation and transportation of the column 213.

[0040] Furthermore, such as Figure 4 As shown, the top and / or bottom of the segmented column 2133 has a connector 2133a, and two adjacent segmented columns 2133 are connected by the connector 2133a. The connector 2133a has a simple structure and is convenient for the installation of the segmented column 2133.

[0041] It should be noted that the connector can also be replaced with other connection structures, for example, fasteners can be used to connect the segmented columns 2133.

[0042] Preferably, the crossbeam 22 is in the shape of a triangular frame, and correspondingly, three columns 21 are provided, which are respectively connected to each corner of the crossbeam 22. The triangular support form can enhance the stability of the structure.

[0043] In some embodiments, the tower 1 is made of traditional steel components and the crossbeam 22 is made of concrete, which can also be prefabricated in advance, making the structure easy to manufacture.

[0044] like Figure 2 As shown, the bottom of the tower 1 is provided with a connecting plate 23, which is connected to the topmost crossbeam 22 by fasteners, thereby realizing the connection between the tower 1 and the pipe column 21. Specifically, the fasteners are high-strength bolts.

[0045] To address the same technical problem, the present invention also provides a construction method for the wind turbine tower, comprising the following steps:

[0046] For the construction of tower 2, the prefabricated support parts 2131 are connected in sequence to form columns 213. After the connection is completed, grout is used to stabilize the joints. The columns 213 are passed through the through holes 221 of each crossbeam 22. After the columns 213 are connected to the crossbeams 22, concrete is poured into the enlarged holes 2211 of the crossbeams 22 to achieve a stable connection between each column 213 and each crossbeam 22. The interiors of each column 213 are connected in sequence to form a hollow cavity 211. Concrete is pumped into the hollow cavity 211. After the concrete fills the hollow cavity 211, it forms a filling part 212, thus completing the construction of tower 2.

[0047] The bottom of the tower 1 is installed on the topmost crossbeam 22 of the constructed tower 2, thereby achieving the connection between the tower 1 and the tower 2.

[0048] Before the step of pumping concrete into the hollow cavity 211, the method further includes:

[0049] A prestressing system is set up, which includes an anchor end 215 and a prestressing tendon 214 connected to the anchor end 215. The anchor end 215 is fixed in the through hole 221 of the crossbeam 22 at the top of the tower 2, and the prestressing tendon 214 is vertically passed through the hollow cavity 211, so that each segment column 2133 is connected through the prestressing system, avoiding complex connection joints between each segment column 2133 and facilitating construction.

[0050] After the concrete fills the hollow cavity 211 to form the filling part 212, the prestressing tendon 214 is embedded in the filling part 212.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A wind turbine tower, characterized in that, The system includes a tower and a tower frame. The tower frame includes a column and multiple crossbeams. The column includes a filling section and multiple columns. The columns are hollow and are arranged vertically in sequence. A crossbeam is provided between two adjacent columns. The crossbeam has a through hole. Two adjacent columns are inserted into the through hole to connect with the crossbeam. The middle parts of each column are connected to form a hollow cavity. The filling section fills the hollow cavity. The column includes a support part and a steel cage embedded in the support part. The support part is a UHPC casting part, and the filling part is a regular concrete part, a recycled concrete part, or a high-strength concrete part. The tower is connected to the top side of the crossbeam located at the very top; The column further includes: prestressing tendons and anchoring ends. The prestressing tendons pass vertically through the hollow cavity and are embedded in the filling part. The top of the prestressing tendons passes through the through hole of the topmost crossbeam, and the anchoring ends are connected to the top of the prestressing tendons and connected to the crossbeam.

2. The wind turbine tower according to claim 1, characterized in that, At least one of the columns is provided with a pumping hole that communicates with the hollow cavity.

3. The wind turbine tower according to claim 1, characterized in that, The column comprises at least two segmented columns connected sequentially along the longitudinal direction.

4. The wind turbine tower according to claim 3, characterized in that, The top and / or bottom of the segmented column are equipped with connectors, and two adjacent segmented columns are connected by the connectors.

5. The wind turbine tower according to claim 1, characterized in that, The crossbeam is in the shape of a triangular frame, and correspondingly, three columns are provided, which are respectively connected to the corners of the crossbeam.

6. The wind turbine tower according to claim 1, characterized in that, The tower is a steel structure, and the crossbeam is a concrete component.

7. The wind turbine tower according to claim 1, characterized in that, The bottom of the tower is provided with a connecting plate, which is connected to the topmost crossbeam by fasteners.

8. A construction method for constructing a wind turbine tower as described in any one of claims 1-7, characterized in that, include: The construction tower is constructed by connecting prefabricated support parts sequentially through connectors to form columns. The columns are then passed through the through holes of each crossbeam to connect the columns to each crossbeam, thus creating a hollow cavity through which the interiors of each column are connected. Concrete is pumped into the hollow cavity, and once the cavity is filled with concrete, a filling section is formed, completing the construction of the tower. The bottom of the tower is installed on the topmost crossbeam of the constructed tower frame.

9. The construction method for the wind turbine tower according to claim 8, characterized in that, Before the step of pumping concrete into the hollow cavity, the method further includes: A prestressing system is provided, the prestressing system including an anchor end and a prestressing tendon connected to the anchor end, the anchor end is fixed in the through hole of the crossbeam at the top of the tower, and the prestressing tendon passes vertically through the hollow cavity. After the concrete fills the hollow cavity to form the filling part, the prestressing tendons are embedded in the filling part.

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