CN113389695A

CN113389695A - Tower assembly for wind driven generator, construction method of tower assembly and wind driven generator

Info

Publication number: CN113389695A
Application number: CN202010167107.0A
Authority: CN
Inventors: 邓飞; 任恩平; 赵晓军
Original assignee: Jinke New Energy Co ltd
Current assignee: Jinke New Energy Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2021-09-14

Abstract

The invention discloses a tower component for a wind driven generator, a construction method thereof and the wind driven generator, wherein the tower component for the wind driven generator comprises: prefabricating a concrete foundation; the truss type tower frame comprises a plurality of precast concrete tower frame members, the precast concrete tower frame members are sequentially connected with a post-cast strip along the vertical direction, each precast concrete tower frame member is of a frame structure and comprises a plurality of supporting pieces, and the post-cast strips of the supporting pieces which are adjacent to each other are connected; and the precast concrete transition piece is arranged at the top of the truss type tower and used for mounting a tower drum or a platform. The tower assembly for the wind driven generator is convenient to process, high in forming efficiency and convenient to transport.

Description

Tower assembly for wind driven generator, construction method of tower assembly and wind driven generator

Technical Field

The application belongs to the technical field of wind driven generators, and particularly relates to a tower component for a wind driven generator, a construction method of the tower component and the wind driven generator with the tower component.

Background

The wind driven generator is a generator which generates rotary motion under the action of lifting force of a wind wheel, and drives a motor to rotate and generate electricity by means of the rotation of the wind wheel so as to convert mechanical energy into electric energy. Along with the increase of the generating efficiency of the fan, the length of the blade is longer and longer, and the height and the section size of the wind power tower matched with the blade in the vertical direction are also increased continuously.

In the related art, a tower of a wind turbine is a steel structure tower. However, the steel structure tower is complex to manufacture, high in cost and difficult to transport, and the construction requirements of the large-section ultrahigh and ultra-long tower are difficult to meet.

Disclosure of Invention

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, one aspect of the present application provides a tower assembly for a wind turbine, which is easy to process, efficient in forming, and easy to transport its components.

The application further provides a wind driven generator.

The application further provides a construction method of the tower assembly for the wind driven generator.

A tower assembly for a wind turbine according to an embodiment of the first aspect of the present application comprises: prefabricating a concrete foundation; the truss type tower frame comprises a plurality of precast concrete tower frame members, the precast concrete tower frame members are sequentially connected with a post-cast strip along the vertical direction, each precast concrete tower frame member is of a frame structure and comprises a plurality of supporting pieces, and the post-cast strips of the supporting pieces which are adjacent to each other are connected; and the precast concrete transition piece is arranged at the top of the truss type tower and used for mounting a tower drum or a platform.

According to the tower assembly for the wind driven generator, the truss type tower is arranged to comprise a plurality of precast concrete tower members which are connected along the vertical sequential post-cast strip, and each precast concrete tower member is a frame structure and comprises a plurality of supporting pieces connected with the post-cast strip. Therefore, in the manufacturing process of the truss type tower frame, a plurality of supporting pieces can be prepared in advance by concrete at places with relatively superior processing conditions, then the supporting pieces are connected into a frame structure in a post-pouring belt mode to form a precast concrete tower frame member, then the precast concrete tower frame member is transported to a construction site of a tower frame assembly, and the precast concrete members are sequentially connected into the truss type tower frame in the post-pouring belt mode at the construction site, so that the truss type tower frame is convenient to process and high in forming efficiency, and the volume and the weight of the precast concrete tower frame member are far smaller than those of the truss type tower frame, so that a large amount of transportation is facilitated, the manufacturing is simple and convenient, and meanwhile, the cost is reduced; and the foundation and the transition piece are also formed by presetting concrete, so that the whole tower frame component is simple and convenient to manufacture, high in forming efficiency and low in cost.

In some embodiments, the plurality of supports includes a plurality of columns each extending along the vertical direction and spaced apart from each other, axes of the plurality of columns are not in the same plane, a plurality of connecting rods connect adjacent columns, the connecting rods connect to post-cast strips of the columns, and post-cast strips of adjacent precast concrete tower members connect.

In some embodiments, the precast concrete tower member is a triangular frame structure, the number of the columns is three, axes of the three columns are not in the same plane, and the plurality of links includes a first link connecting the first column and the second column, a second link connecting the first column and the third column, and a third link connecting the second column and the third column.

In some embodiments, the post is provided with a cavity extending along its length and through the post to form a prestressed concrete hollow tube.

In some embodiments, the support is a square annular plate, a plurality of the square annular plates are not in the same plane, and adjacent ones of the square annular plates are connected by a post-cast strip.

In some embodiments, the square annular plate is provided with a reinforcing member extending along a diagonal line thereof.

In some embodiments, there are three square ring plates, and any two of the three square ring plates are connected to enclose a generally triangular frame structure.

In some embodiments, the height of the precast concrete tower member in the vertical direction is 8m to 16 m.

In some embodiments, the precast concrete foundation includes a plurality of precast foundation members arranged at intervals, centers of the plurality of precast foundation members are not in a same line, the precast foundation members include a bottom plate, a first center tube, and a top plate, the bottom plate and the top plate are arranged at intervals in the vertical direction, the first center tube is installed between the bottom plate and the top plate, and the top plate is connected to a bottom of the lattice tower.

In some embodiments, the prefabricated foundation member further comprises a plurality of diagonal braces, the plurality of diagonal braces are arranged at intervals along the circumference of the first central cylinder, the bottom of each diagonal brace is connected with the bottom plate, and the top of each diagonal brace is connected with the top of the first central cylinder and the top plate.

In some embodiments, the brace comprises: a body extending in a direction from the top plate toward the bottom plate toward a direction away from the first central cylinder, a top of the body being connected to the top of the first central cylinder and the top plate, the body including a first side surface proximate to the first central cylinder and a second side surface distal from the first central cylinder; the connecting section, the connecting section is established on the bottom plate and along the radial extension of a first center section of thick bamboo, the connecting section includes relative first terminal surface and the second terminal surface of arranging on its extending direction, the first terminal surface of connecting section is close to a first center section of thick bamboo, the second terminal surface of connecting section is kept away from a first center section of thick bamboo, the top surface of connecting section with the body links to each other, the first terminal surface of connecting section with the first side of body is crossing, the second terminal surface of connecting section with the second side of body is spaced apart.

In some embodiments, the number of the prefabricated base members is three, and the centers of the three prefabricated base members are respectively located at three vertexes of a triangle.

In some embodiments, the precast concrete foundation includes a plurality of concrete support platforms and a connecting member connecting adjacent concrete support platforms, the connecting member being connected to the concrete support platform post-cast strip, the concrete support platforms being connected to the bottom of the truss tower.

In some embodiments, the concrete support platform is a substantially circular truncated cone and the connector is substantially isosceles trapezoidal in cross-section.

In some embodiments, the precast concrete transition piece includes a second central cylinder and a plurality of connecting arms spaced apart along a circumferential direction of the second central cylinder, the connecting arms extending from an outer circumferential surface of the second central cylinder toward a direction away from the second central cylinder, the connecting arms being connected to the second central cylinder post-cast strip.

In some embodiments, the second central cartridge comprises a plurality of pre-fabricated arcuate components, with post-cast strips connecting adjacent pre-fabricated arcuate components.

In some embodiments, the bottom surface of the connecting arm is a horizontal surface, and the top surface of the connecting arm is a slope that slopes downward in a direction away from the second central cylinder.

In some embodiments, the connecting arms extend in a direction from top to bottom toward a direction away from the second central cylinder, and adjacent connecting arms are connected by a wire rope.

The wind power generator according to an embodiment of the second aspect of the present application comprises a tower assembly for a wind power generator as described in any of the embodiments above.

The construction method for the tower assembly of the wind driven generator according to the embodiment of the third aspect of the application comprises the following steps:

excavating a foundation pit and constructing a cushion layer;

mounting a precast concrete foundation on the cushion layer;

mounting a cabin and blades of the wind driven generator on the precast concrete transition piece;

temporarily placing the precast concrete transition piece on the precast concrete foundation;

and sequentially installing a plurality of precast concrete tower frame members between the precast concrete foundation and the precast concrete transition piece by adopting a self-lifting method.

In some embodiments, the step of sequentially installing a plurality of precast concrete tower members between the precast concrete foundation and the precast concrete transition piece comprises: connecting a plurality of the precast concrete tower members, connecting a lowermost precast tower member of the plurality of precast concrete tower members and the precast concrete foundation, and connecting an uppermost precast tower member of the plurality of precast concrete tower members and the precast concrete transition piece.

Drawings

FIG. 1 is a block diagram of a tower assembly for a wind turbine according to an embodiment of the present application.

FIG. 2 is a top view of the tower assembly for the wind turbine shown in FIG. 1.

Fig. 3 is a structural view of the precast concrete tower member of fig. 1.

Fig. 4 is a front view of the precast concrete tower member of fig. 3.

Fig. 5 is a side view of the precast concrete tower member of fig. 3.

Fig. 6 is a structural view of a prefabricated foundation member of the prefabricated concrete foundation of fig. 1.

Fig. 7 is a front view of the prefabricated base unit of fig. 6.

Fig. 8 is a plan view of the prefabricated base unit of fig. 6.

FIG. 9 is a block diagram of the precast concrete transition piece of FIG. 1.

Fig. 10 is a front view of the precast concrete transition piece of fig. 9.

FIG. 11 is a top view of the precast concrete transition piece of FIG. 9.

FIG. 12 is a block diagram of a second center barrel of the precast concrete transition piece of FIG. 9.

FIG. 13 is a block diagram of a connecting arm of the precast concrete transition piece of FIG. 9.

FIG. 14 is a block diagram of a tower assembly for a wind turbine according to another embodiment of the present application.

FIG. 15 is a top view of the tower assembly for the wind turbine shown in FIG. 14.

Fig. 16 is a structural view of the precast concrete tower member of fig. 14.

Fig. 17 is a front view of the precast concrete tower member of fig. 16.

Fig. 18 is a side view of the precast concrete tower member of fig. 16.

Fig. 19 is a structural view of the precast concrete foundation of fig. 14.

FIG. 20 is a block diagram of the precast concrete transition piece of FIG. 14.

Reference numerals:

tower assembly 100, truss tower 1, prefabricated concrete tower member 11, upright 111, connecting rod 112, square annular plate 113, reinforcement 114, prefabricated concrete foundation 2, prefabricated foundation member 21, bottom plate 211, first central cylinder 212, top plate 213, diagonal brace 214, body 2141, connecting section 2142, concrete support table 22, connecting piece 23, prefabricated concrete transition piece 3, second central cylinder 31, connecting arm 32, and steel cable 33.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

As shown in fig. 1 to 20, a tower assembly 100 for a wind power generator according to an embodiment of the present application includes a lattice tower 1, a precast concrete foundation 2, and a precast concrete transition piece 3, the lattice tower 1 being mounted on the precast concrete foundation 2. In other words, the precast concrete foundation 2 is prepared in advance from concrete for supporting the lattice tower 1 and/or the structure of the upper portion of the lattice tower 1.

As shown in fig. 1 to 5 and 14 to 18, the lattice tower 1 includes a plurality of precast concrete tower members 11, and the plurality of precast concrete tower members 11 are connected in vertical sequence by post-cast strips.

Specifically, a plurality of precast concrete tower members 11 may be provided with reinforcing bars, sleeves, and reserved holes in advance in the prefabrication process to realize post-cast strip connection of adjacent precast concrete tower members 11 in a sleeve grouting manner. It will be appreciated that the present application is not so limited and that the post-cast strip connection may be achieved in other ways for adjacent precast concrete tower members 11.

The precast concrete tower member 11 is a frame structure and includes a plurality of support members, of which adjacent support members are post-cast strip connected. Specifically, a plurality of support piece can preset reinforcing bar, sleeve and set up the hole with staying at the prefabrication in-process to realize that the post-cast strip of adjacent support piece connects through the mode of sleeve grout. It will be appreciated that the present application is not so limited and that adjacent supports may be connected in other ways to achieve post-cast strip connection.

The precast concrete transition piece 3 is arranged at the top of the truss type tower frame 1 and used for installing a tower barrel or a platform. In other words, the precast concrete transition piece 3 is prepared in advance from concrete, and it can be installed on top of the truss tower 1. The top of the precast concrete transition piece 3 may mount a tower or platform that supports the nacelle and blades of the wind turbine.

According to the tower assembly 100 for the wind power generator of the embodiment of the application, the truss type tower frame 1 is arranged to comprise a plurality of prefabricated concrete tower frame members 11 which are connected along the vertical direction in a post-pouring belt mode, and each prefabricated concrete tower frame member 11 is a frame structure and comprises a plurality of supporting pieces connected with the post-pouring belt.

Therefore, in the manufacturing process of the truss type tower frame 1, a plurality of supporting pieces can be prepared in advance by concrete at places with relatively superior processing conditions, then the supporting pieces are connected into a frame structure in a post-pouring belt mode to form the precast concrete tower frame member 11, then the precast concrete tower frame member 11 is transported to a construction site of the tower frame assembly 100, the precast concrete members are sequentially connected into the truss type tower frame 1 in the construction site in the post-pouring belt mode, the processing is convenient, the forming efficiency is high, and as the volume and the weight of the precast concrete tower frame member 11 are far smaller than those of the truss type tower frame 1, the large-scale transportation is facilitated, the manufacturing is simple and convenient, and meanwhile, the cost is reduced; and the foundation and the transition piece are also formed by presetting concrete, so the whole tower frame assembly 100 is simple and convenient to manufacture, high in forming efficiency and low in cost.

In some embodiments, as shown in fig. 1-5, the plurality of supports includes a plurality of columns 111 and a plurality of links 112, each of the plurality of columns 111 extends vertically and is spaced apart, and axes of the plurality of columns 111 are not in the same plane. In other words, the precast concrete tower member 11 includes a plurality of columns 111 and a plurality of links 112 extending in the up-down direction, and axes of the plurality of columns 111 are not in the same plane so that the precast concrete tower member 11 constitutes a frame structure.

A plurality of links 112 connect adjacent ones of the plurality of columns 111, the links 112 being connected to the post-cast strip of columns 111. Specifically, the columns 111 and the connecting rods 112 can be pre-provided with steel bars, sleeves and reserved holes as required in the prefabrication process, so that the connecting rods 112 are connected with the post-cast strips of the columns 111 in a sleeve grouting mode. It is understood that the present application is not limited thereto, and the connecting rod 112 and the pillar 111 may be connected to the post-cast strip in other manners.

The columns 111 of adjacent precast concrete tower members 11 are connected by post-cast strips. In other words, the connection of two vertically adjacent precast concrete tower members 11 is achieved by connecting the columns 111 of the two vertically adjacent precast concrete tower members 11 corresponding to the post-cast strip.

In some embodiments, the precast concrete tower member 11 is a triangular frame structure, the columns 111 are three, axes of the three columns 111 are not in the same plane, and the plurality of links 112 includes a first link connecting the first column 111 and the second column 111, a second link connecting the first column 111 and the third column 111, and a third link connecting the second column 111 and the third column 111.

As shown in fig. 1 and 3 to 5, the precast concrete tower member 11 has three vertical columns 111 extending in the vertical direction, any two adjacent vertical columns 111 are arranged at intervals, the axes of the three vertical columns 111 are not in the same plane, two first connecting rods, two second connecting rods and two third connecting rods are provided, one first connecting rod connects the upper end of the first vertical column 111 and the upper end of the second vertical column 111, and the other first connecting rod connects the upper end of the first vertical column 111 and the lower end of the second vertical column 111; one second connecting rod connects the upper end of the first upright 111 and the upper end of the third upright 111, and the other second connecting rod connects the lower end of the first upright 111 and the upper end of the third upright 111; one third link connects the upper end of the second upright 111 and the upper end of the third upright 111, and the other third link connects the upper end of the second upright 111 and the lower end of the third upright 111.

Further, each upright 111 is provided with a cavity extending along its length and through the upright 111 to form a prestressed concrete hollow tube. Specifically, the two ends of the prestressed concrete hollow pipe are provided with a steel bar, a sleeve and reserved holes in advance, and when two vertically adjacent prefabricated concrete tower members 11 are connected, the post-cast strip connection of the two vertically adjacent prestressed concrete hollow pipes is realized by the prestressed concrete hollow pipes of the two prefabricated concrete tower members 11 in a sleeve grouting mode.

The specific structure of the truss tower 1 of the present application is not limited to the structure shown in fig. 1 to 5, for example, in other specific embodiments, as shown in fig. 14 to 18, the supporting member is a square ring plate 113, the plurality of square ring plates 113 are not in the same plane, and the post-cast strips of adjacent square ring plates 113 among the plurality of square ring plates 113 are connected. In other words, the precast concrete tower member 11 includes a plurality of square ring plates 113, the plurality of square ring plates 113 are not in the same plane to constitute a frame structure, and adjacent two square ring plates 113 are connected by a post-cast strip.

Specifically, each square annular plate 113 can be provided with steel bars and sleeves in advance and provided with holes according to needs in the prefabrication process, so that the post-cast strip connection of the adjacent square annular plates 113 is realized in a sleeve grouting mode. It is to be understood that the present application is not limited thereto, and the adjacent square ring plates 113 may be connected in other manners to achieve the post-cast strip. Further, the square ring plate 113 is provided with a reinforcing member 114 extending along a diagonal line thereof to pass the strength of the square ring plate 113. Specifically, the reinforcement 114 and the square ring plate 113 may be integrally formed.

Further, there are three square ring plates 113, and any two square ring plates 113 of the three square ring plates 113 are connected to enclose a generally triangular frame structure.

In some embodiments, the precast concrete tower member 11 has a height of 8m to 16m in the vertical direction. Specifically, in the embodiment shown in fig. 1-5, the height of the upright 111 in the vertical direction is 8m to 16 m; or in the embodiment shown in fig. 14-18, the square annular plate 113 has a height of 8m to 16m in the vertical direction.

A precast concrete foundation 2 of a tower assembly 11 according to an embodiment of the present application is described below with reference to FIGS. 1-8 and 14-19.

In some alternative embodiments, as shown in fig. 1, 3, and 6-8, precast concrete foundation 2 includes a plurality of precast foundation members 21, the plurality of precast foundation members 21 being arranged at intervals, centers of the plurality of precast foundation members 21 not being on the same straight line.

The prefabricated foundation member 21 includes a bottom plate 211, a first center tube 212 and a top plate 213, the bottom plate 211 and the top plate 213 being vertically spaced apart, the first center tube 212 being installed between the bottom plate 211 and the top plate 213, and the top plate 213 being connected to the bottom of the lattice tower 1. In other words, the first center tube 212 is provided on the bottom plate 211, the top of the first center tube 212 is connected to the top plate 213, and the top of the top plate 213 is connected to the lattice tower 1.

Specifically, the bottom of the first central cylinder 212 is connected to the bottom plate 211 and the top of the first central cylinder 212 is connected to the top plate 213 by post-cast strips. Further, the connection between the bottom of the first central cylinder 212 and the bottom plate 211 and the connection between the top of the first central cylinder 212 and the top plate 213 are all achieved in a manner of sleeve grouting. It is understood that the present application is not limited thereto, and other post-cast strip connection may be used between the bottom of the first central cylinder 212 and the bottom plate 211, and between the top of the first central cylinder 212 and the top plate 213, for example.

In the manufacturing process of the precast concrete foundation 2 for the tower assembly 100 of the wind turbine according to the embodiment of the present application, the bottom plate 211, the first central cylinder 212, and the top plate 213 may be prepared from concrete in a place where the processing conditions are relatively superior, and then connected by means of the post-cast strip to form the precast foundation member 21, and then the precast foundation member 21 may be transported to the construction site of the tower assembly 100, which is convenient to process and efficient in forming, and facilitates mass transportation.

In some embodiments, the top of top plate 213 is correspondingly connected to vertical column 111 in the embodiment shown in fig. 1-6; the top of the top plate 213 may also be correspondingly connected to the intersection of two adjacent square annular plates 113 in the embodiment shown in fig. 14-18. Further, the top plate 213 is connected with the bottom end of the upright 111 or the bottom end of the intersection of the top plate 213 and the adjacent two square annular plates 113 through the post-cast strip.

Specifically, the top plate 213 and the upright 111 or the intersection of the top plate 213 and the two adjacent square annular plates 113 are connected in a manner of sleeve grouting. It is understood that the present application is not limited thereto, and other post-cast strip connection may be used between the top plate 213 and the upright 111 or between the intersection of the top plate 213 and the two adjacent square annular plates 113.

In some specific embodiments, as shown in fig. 6-8, the peripheral profiles of the bottom plate 211, the first central cylinder 212, and the top plate 213 are all generally circular, and the bottom plate 211, the first central cylinder 212, and the top plate 213 are coaxially disposed, wherein the cross-sectional area of the bottom plate 211 is greater than the cross-sectional area of the top plate 213, and the cross-sectional area of the top plate 213 is greater than the cross-sectional area of the first central cylinder 212.

In some specific embodiments, as shown in fig. 6-8, the prefabricated base member 21 further includes a plurality of diagonal braces 214, the plurality of diagonal braces 214 are arranged at intervals along the circumference of the first central cylinder 212, the bottom of the diagonal brace 214 is connected to the bottom plate 211, and the top of the diagonal brace 214 is connected to the top of the first central cylinder 212 and the top plate 213.

Further, the brace 214 includes a body 2141 and a connecting section 2142. The body 2141 extends in a direction from the top plate 213 toward the bottom plate 211 toward a direction away from the first central cylinder 212, and the top of the body 2141 is connected to the top of the first central cylinder 212 and the top plate 213. The body 2141 includes a first side proximate to the first central cartridge 212 and a second side distal to the first central cartridge 212. As shown in fig. 1 and 6, the body 2141 extends outward in a direction from top to bottom, where outward refers to a direction away from the axial center of the first central cartridge 212. The body 2141 includes a first side and a second side in a radial direction of the first central tube 212, and the first side of the body 2141 is adjacent to the first central tube 212 compared to the second side.

The connecting section 2142 is disposed on the bottom plate 211 and extends in a radial direction of the first central tube 212, the connecting section 2142 includes a first end surface and a second end surface that are oppositely arranged in an extending direction thereof, the first end surface of the connecting section 2142 is adjacent to the first central tube 212, and the second end surface of the connecting section 2142 is away from the first central tube 212. In other words, the connecting section 2142 includes a first end face and a second end face that are oppositely arranged in a radial direction of the first central cylinder 212, and the first end face of the connecting section 2142 is adjacent to the first central cylinder 212 as compared to the second end face.

The top surface of the connecting section 2142 is connected to the body 2141, the first end surface of the connecting section 2142 intersects the first side surface of the body 2141, and the second end surface of the connecting section 2142 is spaced apart from the second side surface of the body 2141. In other words, the second end surface of the connecting section 2142 does not intersect the second side surface of the body 2141.

Specifically, as shown in fig. 1 and 2, there are three prefabricated base members 21, and the centers of the three prefabricated base members 21 are located at the vertices of a triangle, respectively. In other words, the prefabricated tower foundation 2 is composed of three prefabricated foundation members 21, and the connecting lines of the centers of two prefabricated foundation members 21 of the three prefabricated foundation members 21 form a triangle.

It will be appreciated that the construction of the precast concrete foundation 2 is not limited to that shown in figures 1, 2 and 6-8, for example in further alternative embodiments, as shown in figures 14-19, the precast concrete foundation 2 includes a plurality of concrete support tables 22 and connectors 23 connecting adjacent concrete support tables 22, the connectors 23 being connected to the post-cast strips of concrete support tables 22, the concrete support tables 22 being connected to the bottom of the lattice tower 1.

In other words, the adjacent concrete support platforms 22 of the plurality of concrete support platforms 22 are connected by the connecting member 23, and the post-cast strip is connected between the connecting member 23 and the concrete support platform 22.

Specifically, the concrete support platform 22 and the connecting member 23 may be both prepared in advance from concrete, and reinforcing bars, sleeves, and holes may be provided in advance during the prefabrication process, so that the connecting member 23 and the concrete support platform 22 are connected by means of sleeve grouting. It will be appreciated that the present application is not so limited and that other post-cast strip arrangements may be used to provide the connection between the connector 23 and the concrete support platform 22.

In the manufacturing process of the precast concrete foundation 2 in the tower assembly 100 for the wind turbine according to the embodiment of the present application, the concrete support platform 22 and the connecting member 23 may be respectively prepared from concrete in a place where the processing conditions are relatively superior, and then connected by means of the post-cast strip to form the precast concrete foundation 2, and then the precast concrete foundation 2 is transported to the construction site of the tower assembly 100, so that the processing is convenient, the forming efficiency is high, and the mass transportation is convenient.

In some specific embodiments, the concrete support table 22 is connected to the bottom post-cast strip of the lattice tower 1. Specifically, the concrete support platform 22 may be connected to the bottom end of the upright 111 in the embodiment shown in fig. 1-5 in a corresponding post-cast strip; the concrete support platform 22 may also be connected to the bottom end of the intersection of two adjacent square annular plates 113 in the embodiment shown in fig. 14-18, correspondingly as a post-cast strip.

Further, the concrete support platform 22 and the upright 111 or the intersection of the concrete support platform 22 and the two square annular plates 113 are connected by grouting sleeves. It will be appreciated that the present application is not limited thereto and that other post-cast strip arrangements may be used to connect the concrete support platform 22 to the upright 111 or the intersection of the concrete support platform 22 and the two annular plates 113.

In some specific embodiments, as shown in fig. 19, the concrete support table 22 is generally a circular table. In other words, the cross section of the concrete support table 22 is circular, and the diameter of the concrete support table 22 is gradually reduced in the direction from bottom to top.

The cross-section of the connecting piece 23 is substantially isosceles trapezoid. Specifically, the two ends of the connecting member 23 along the length direction thereof are respectively connected to the two concrete support tables 22, and the width of the connecting member 23 is gradually reduced from bottom to top.

Precast concrete transition piece 3 of tower assembly 100 according to an embodiment of the present application is described below with reference to fig. 1, 2 and 9-13, as well as fig. 14, 15 and 20.

In some embodiments, as shown in fig. 9 to 11 and 20, the precast concrete transition piece 3 includes a second central cylinder 31 and a plurality of connecting arms 32, the plurality of connecting arms 32 being arranged at intervals along a circumference of the second central cylinder 31, the connecting arms 32 extending from an outer circumferential surface of the second central cylinder 31 toward a direction away from the second central cylinder 31, the connecting arms 32 being connected to the second central cylinder 31 by post-cast.

In the manufacturing process of the precast concrete transition piece 3 in the tower assembly 100 for the wind turbine according to the embodiment of the present application, the second central cylinder 31 and the connecting arm 32 may be respectively prepared from concrete in a place with relatively superior processing conditions, and then connected by means of a post-cast strip to form the precast concrete transition piece 3, and then the precast concrete transition piece 3 is transported to the construction site of the tower assembly 100, so that the processing is convenient, the molding efficiency is high, and a large amount of transportation is facilitated.

For the connection of the second center cylinder 31 and the connecting arms 32, as shown in fig. 12 and 13, for example, the second center cylinder 31 is left with holes and/or sleeves on its peripheral wall during prefabrication, and the connecting arms 32 are provided with reinforcing bars during prefabrication. When the connecting arm 32 is connected to the second central tube 31, the reinforcing bars of the connecting arm 32 are inserted into the holes or sleeves of the second central tube 31, and then grouted, thereby achieving the connection.

Specifically, the end of the connecting arm 32 remote from the second central tube 31 is connected to the top of the lattice tower 1. Further, an end of the connecting arm 32 remote from the second center tube 31 may be connected to a top end of the upright 111 of the embodiment of fig. 1 to 5 of the precast concrete tower member 21 of the lattice tower 1 located at the uppermost end; the end of the connecting arm 32 remote from the second central tube 31 may also be connected to the top end of the intersection of two adjacent square annular plates 113 of the uppermost precast concrete tower member 21 of the lattice tower 1 in the embodiment of fig. 14-18.

Wherein the end of the connecting arm 32 remote from the second central cylinder 31 is connected to the top post-cast strip of the upright 111, for example by means of a sleeve grout. One end of the connecting arm 32 far away from the second central cylinder 31 is connected with a top end post-cast strip at the intersection of the two adjacent square annular plates 113, for example, in a manner of sleeve grouting.

In some specific embodiments, the second central cartridge 31 comprises a plurality of pre-fabricated arc-shaped members (not shown), with adjacent pre-fabricated arc-shaped members being post-cast strip connected. In other words, the arcs of the plurality of pre-fabricated arc-shaped members are substantially on the same circle, and the plurality of pre-fabricated arc-shaped members are sequentially connected by the post-cast strip to enclose the second central cylinder 31. Specifically, any two adjacent prefabricated arc-shaped components in the plurality of prefabricated arc-shaped components are connected through sleeve grouting. It is to be understood that the present application is not limited thereto.

In some specific embodiments, as shown in fig. 9, 10 and 13, the bottom surface of the connecting arm 32 is a horizontal surface, and the top surface of the connecting arm 32 is a slope that is inclined downward in a direction away from the second central cylinder 31. In other words, the bottom surface of the connecting arm 32 is horizontal, and the top surface of the connecting arm 32 is inclined upward with respect to the bottom surface. The precast concrete transition piece 3 can transfer the load of the upper wind generating set and the upper tower drum to the lower truss type tower frame 1. According to the force analysis, the connecting arm 32 has a large bending moment in a portion near the second center tube 31 and a small bending moment in a portion near the truss tower 2. In the embodiment, the section height of the connecting arm 32 at the part close to the second central cylinder 31 is relatively high, and the section height of the connecting arm 32 close to the truss-type tower 2 is low, so that the bending resistance and the shearing resistance bearing capacity of the connecting arm 32 at the part close to the second central cylinder 31 are improved, and the stress requirement can be met.

Specifically, the connecting arms 32 are three, and the three connecting arms 32 are arranged at regular intervals in the circumferential direction of the second center cylinder 31.

It will be appreciated that the configuration of the connecting arms 32 is not limited to the embodiment shown in fig. 9-13, for example, in some embodiments, as shown in fig. 20, the connecting arms 32 extend in a direction from top to bottom toward a direction away from the second central cylinder 31, and adjacent connecting arms 32 are connected by a cable 33. In other words, the connecting arms 32 are provided obliquely downward in a direction away from the second center cylinder 31, and the bottom portions of any adjacent two of the plurality of connecting arms 32 are connected by the wire rope 33. According to the stress analysis, the lower part of the joint of the precast concrete transition piece 3 and the truss type tower frame 1 is pulled, and the upper part is pressed, and because the concrete compression performance is good and the steel cable tension performance is good, the connecting arms 32 are made of reinforced concrete members, and the bottoms of the adjacent connecting arms 32 are connected by the steel cable, so that a beam string stress system is formed.

The wind power generator according to the embodiment of the present application includes the tower assembly 100 for the wind power generator of any of the above embodiments.

The construction method for the tower assembly of the wind driven generator according to the embodiment of the application comprises the following steps:

excavating a foundation pit and constructing a cushion layer;

installing the precast concrete foundation 2 on the bed course, in other words, the precast concrete foundation 2 is prepared in advance from concrete, and the prepared precast concrete foundation 2 may be installed on the bed course after being transported to the construction site of the tower assembly 100;

mounting the engine room, the blades and the like of the wind driven generator on the precast concrete transition piece 3, in other words, the precast concrete transition piece 3 is prepared in advance from concrete, and after the prepared precast concrete transition piece 3 is transported to the construction site of the tower assembly 100, the engine room, the blades and the like of the wind driven generator can be mounted thereon;

temporarily placing the precast concrete transition piece 3 on the precast concrete foundation 2, in other words, temporarily placing the precast concrete transition piece 3 on the precast concrete foundation 2, since the precast concrete transition piece 3 can be lifted to a predetermined height from the precast concrete foundation 2, in this step, the precast concrete transition piece 3 is only temporarily placed on the precast concrete foundation 2;

a plurality of precast concrete tower members 11 are sequentially installed between the precast concrete foundation 2 and the precast concrete transition piece 3 by a self-lifting method, in other words, the precast concrete tower members 11 are prepared in advance from concrete, and after the prepared precast concrete tower members 11 are transported to a construction site of the tower assembly 100, the plurality of precast concrete tower members 11 are sequentially installed by a self-lifting system to form the truss type tower 1. Specifically, the self-lifting system is installed at the bottom of the precast concrete transition piece 3, the precast concrete transition piece 3 is lifted by a preset height by a lifting piece of the self-lifting system and then returns, the first precast concrete tower member 11 is installed on the lifting piece, the first precast concrete tower member 11 and the precast concrete transition piece 3 are lifted by the lifting piece again by the preset height and then return, the second precast concrete tower member 11 is installed on the lifting piece, the second precast concrete tower member 11, the first precast concrete tower member 11 and the precast concrete transition piece 3 are lifted by the lifting piece again by the preset height and then return, a third precast concrete tower member 11 … … is then installed in sequence between precast concrete foundation 2 and precast concrete transition piece 3 in sequence as described above.

In some embodiments, the step of sequentially installing a plurality of precast concrete tower members 11 between the precast concrete foundation 2 and the precast concrete transition piece 3 includes:

connecting a plurality of prefabricated concrete tower members 11, connecting a lowermost prefabricated tower member 11 of the plurality of prefabricated concrete tower members 11 with the prefabricated concrete foundation 2, and connecting an uppermost prefabricated tower member 11 of the plurality of prefabricated concrete tower members 11 with the prefabricated concrete transition piece 3.

Specifically, the plurality of precast concrete tower members 11 are connected to each other by the post-cast strip in sequence, the precast tower member 11 located at the lowermost end of the plurality of precast concrete tower members 11 is connected to the post-cast strip of the precast concrete foundation 2, and the precast tower member 11 located at the uppermost end of the plurality of precast concrete tower members 11 is connected to the post-cast strip of the precast concrete transition piece 3. More specifically, the plurality of precast concrete tower members 11 are sequentially connected in a sleeve grouting manner, the precast tower member 11 located at the lowermost end of the plurality of precast concrete tower members 11 is connected to the precast concrete foundation 2 in a sleeve grouting manner, and the precast tower member 11 located at the uppermost end of the plurality of precast concrete tower members 11 is connected to the precast concrete transition piece 3 in a sleeve grouting manner.

In some specific embodiments, the step of connecting a plurality of precast concrete tower members 11 includes: the prestressed reinforcement in the precast concrete tower member 11 is tensioned. It is to be understood that the present application is not limited thereto.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A tower assembly for a wind turbine, comprising:

prefabricating a concrete foundation;

the truss type tower frame is installed on the precast concrete foundation and comprises a plurality of precast concrete tower frame members, the precast concrete tower frame members are sequentially connected with a post-cast strip along the vertical direction, each precast concrete tower frame member is of a frame structure and comprises a plurality of supporting pieces, and the post-cast strips of the adjacent supporting pieces in the plurality of supporting pieces are connected;

and the precast concrete transition piece is arranged at the top of the truss type tower and used for mounting a tower drum or a platform.

2. The tower assembly for a wind turbine according to claim 1, wherein the plurality of supports includes a plurality of columns each extending vertically and spaced apart, axes of the plurality of columns not lying in a same plane, and a plurality of connecting rods connecting adjacent columns, the connecting rods connecting post-cast strips of the column and post-cast strips of adjacent precast concrete tower members.

3. The tower assembly for a wind turbine according to claim 2, wherein said precast concrete tower member is a triangular frame structure, said columns are three, axes of said three columns are not in the same plane, and said plurality of links includes a first link connecting a first column and a second column, a second link connecting said first column and a third column, and a third link connecting said second column and said third column.

4. A tower assembly for a wind power generator according to claim 2 or 3, wherein the uprights are provided with cavities extending along their length and through the uprights to form pre-stressed concrete hollow tubes.

5. The tower assembly for a wind turbine according to claim 1, wherein said support is a square annular plate, a plurality of said square annular plates being out of a same plane, adjacent ones of said square annular plates being connected by a post-cast strip.

6. A tower assembly for a wind powered generator as claimed in claim 5, wherein said square annular plate is provided with stiffeners extending diagonally therealong.

7. A tower assembly for a wind powered generator as claimed in claim 5 or claim 6, in which there are three square annular plates, any two of which are connected to enclose a generally triangular frame structure.

8. The tower assembly for a wind turbine according to any of claims 1-7, wherein the height of the precast concrete tower member in the vertical direction is 8-16 m.

9. The tower assembly for a wind turbine according to claim 1, wherein said precast concrete foundation includes a plurality of precast foundation members spaced apart with centers thereof not aligned in a straight line, said precast foundation members including a bottom plate, a first center tube and a top plate spaced apart in said vertical direction, said first center tube being installed between said bottom plate and said top plate, said top plate being connected to a bottom of said lattice tower.

10. The tower assembly for a wind turbine according to claim 9, wherein said prefabricated foundation member further comprises a plurality of struts spaced circumferentially around said first central tube, wherein a bottom portion of said struts is connected to said bottom plate and a top portion of said struts is connected to a top portion of said first central tube and said top plate.

11. The tower assembly for a wind turbine according to claim 10, wherein the brace comprises:

a body extending in a direction from the top plate toward the bottom plate toward a direction away from the first central cylinder, a top of the body being connected to the top of the first central cylinder and the top plate, the body including a first side surface proximate to the first central cylinder and a second side surface distal from the first central cylinder;

the connecting section, the connecting section is established on the bottom plate and along the radial extension of a first center section of thick bamboo, the connecting section includes relative first terminal surface and the second terminal surface of arranging on its extending direction, the first terminal surface of connecting section is close to a first center section of thick bamboo, the second terminal surface of connecting section is kept away from a first center section of thick bamboo, the top surface of connecting section with the body links to each other, the first terminal surface of connecting section with the first side of body is crossing, the second terminal surface of connecting section with the second side of body is spaced apart.

12. The tower assembly for a wind turbine according to any of claims 9-11, wherein there are three prefabricated foundation elements, and the centers of the three prefabricated foundation elements are located at three vertices of a triangle, respectively.

13. The tower assembly for a wind turbine according to claim 1, wherein said precast concrete foundation includes a plurality of concrete support tables and connectors connecting adjacent said concrete support tables, said connectors being connected to said concrete support table post-cast strip, said concrete support tables being connected to a bottom of said truss tower.

14. The tower assembly for a wind turbine according to claim 13, wherein said concrete support platform is substantially a circular truncated cone and said connecting member is substantially an isosceles trapezoid in cross-section.

15. The tower assembly for a wind turbine according to any one of claims 1-14, wherein said precast concrete transition piece comprises a second central cylinder and a plurality of connecting arms spaced circumferentially of said second central cylinder, said connecting arms extending from an outer circumferential surface of said second central cylinder in a direction away from said second central cylinder, said connecting arms being connected to said second central cylinder post-cast strip.

16. The tower assembly for a wind turbine according to claim 15, wherein said second central tube comprises a plurality of pre-fabricated curved members, adjacent said pre-fabricated curved members being post-cast.

17. The tower assembly for a wind power generator according to claim 15 or 16, wherein the bottom surface of the connecting arm is a horizontal surface, and the top surface of the connecting arm is a slope inclined downward in a direction away from the second central cylinder.

18. The tower assembly for a wind turbine according to claim 15 or 16, wherein said connecting arms extend in a direction from top to bottom towards a direction away from said second central tube, and adjacent connecting arms are connected by a wire rope.

19. A wind power generator, comprising a tower assembly for a wind power generator according to any of claims 1-16.

20. A method of constructing a tower assembly for a wind turbine, comprising the steps of:

excavating a foundation pit and constructing a cushion layer;

mounting a precast concrete foundation on the cushion layer;

21. A method of constructing a tower assembly for a wind turbine according to claim 20, wherein said step of sequentially installing a plurality of precast concrete tower members between said precast concrete foundation and said precast concrete transition piece comprises: connecting a plurality of the precast concrete tower members, connecting a lowermost precast tower member of the plurality of precast concrete tower members and the precast concrete foundation, and connecting an uppermost precast tower member of the plurality of precast concrete tower members and the precast concrete transition piece.