Tower assembly for a wind turbine, method of construction thereof and wind turbine

Abstract

The application discloses a tower assembly for a wind driven generator, a construction method thereof and the wind driven generator, and the tower assembly for the wind driven generator comprises a prefabricated concrete foundation, a truss tower, a prefabricated concrete transition piece, and the truss tower comprises a plurality of prefabricated concrete tower members which are connected in sequence along a vertical direction by post-pouring belts, the prefabricated concrete tower members are frame structures and comprise a plurality of support pieces, and adjacent support pieces in the plurality of support pieces are connected by post-pouring belts; and the prefabricated concrete transition piece is arranged at the top of the truss 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 the components thereof are convenient to transport.

Description

Technical Field

[0001] This application belongs to the field of wind turbine technology, specifically, it relates to a tower assembly for a wind turbine, a construction method for the tower assembly, and a wind turbine having the tower assembly. Background Technology

[0002] A wind turbine is a generator that uses a wind turbine to rotate under the influence of lift. The rotation of the wind turbine drives the rotation of a motor to generate electricity, converting mechanical energy into electrical energy. As the power generation efficiency of wind turbines increases, the blade length becomes longer, and the height and cross-sectional dimensions of the corresponding wind turbine towers also continue to increase.

[0003] In related technologies, wind turbine towers are typically steel structures. However, steel structures are complex to manufacture, costly, and difficult to transport, making them unsuitable for constructing large-section, ultra-high, and ultra-long towers. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, one aspect of this application proposes a tower assembly for a wind turbine, which is easy to process, has high forming efficiency, and whose components are easy to transport.

[0006] This application also proposes a wind turbine.

[0007] In another aspect, this application also proposes a construction method for a tower assembly for a wind turbine.

[0008] A tower assembly for a wind turbine according to an embodiment of the first aspect of this application includes: a precast concrete foundation; a truss-type tower comprising a plurality of precast concrete tower components connected sequentially along a vertical direction by post-cast strips, the precast concrete tower components being a frame structure and including a plurality of support members, adjacent support members being connected by post-cast strips; and a precast concrete transition member disposed on the top of the truss-type tower for mounting a tower or platform.

[0009] According to the embodiments of this application, the tower assembly for a wind turbine generator is configured as a truss-type tower comprising multiple precast concrete tower components connected sequentially along vertical cast-in-place strips. Each precast concrete tower component is a frame structure and includes multiple support components connected to each other via cast-in-place strips. Therefore, in the manufacturing process of the truss-type tower of this application, multiple support components can be pre-prepared from concrete in a location with relatively favorable processing conditions. These support components are then connected into a frame structure using cast-in-place strips to form the precast concrete tower component. The precast concrete tower component is then transported to the construction site of the tower assembly. At the construction site, the multiple precast concrete components are sequentially connected into a truss-type tower using cast-in-place strips. This process is convenient and has high forming efficiency. Since the volume and weight of the precast concrete tower component are much smaller than those of the truss-type tower, it is easy to transport in large quantities. The manufacturing process is simple and convenient, reducing costs. Furthermore, the foundation and transition components are also pre-set from concrete, making the entire tower assembly simple and convenient to manufacture, with high forming efficiency and low cost.

[0010] In some embodiments, the plurality of support members include a plurality of columns and a plurality of connecting rods. The plurality of columns extend along the vertical direction and are spaced apart. The axes of the plurality of columns are not in the same plane. The plurality of connecting rods connect adjacent columns. The connecting rods are connected to the post-cast strips of the columns. The post-cast strips of the columns of adjacent precast concrete tower structural members are connected.

[0011] In some embodiments, the precast concrete tower structure is a triangular frame structure, and there are three columns whose axes are not in the same plane. The plurality of connecting rods include a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod connects the first column and the second column, the second connecting rod connects the first column and the third column, and the third connecting rod connects the second column and the third column.

[0012] In some embodiments, the column has a cavity extending along its length and penetrating through the column to form a prestressed concrete hollow tube.

[0013] In some embodiments, the support member is a square annular plate, and multiple square annular plates are not in the same plane, with adjacent square annular plates connected by post-cast strips.

[0014] In some embodiments, the square annular plate is provided with a reinforcing member extending along its diagonal.

[0015] In some embodiments, there are three square annular plates, and any two of the three square annular plates are connected to form a generally triangular frame structure.

[0016] In some embodiments, the height of the precast concrete tower structure component in the vertical direction is 8m to 16m.

[0017] In some embodiments, the precast concrete foundation includes a plurality of precast foundation components, which are arranged at intervals and whose centers are not on the same straight line. Each precast foundation component includes a base plate, a first central tube, and a top plate. The base plate and the top plate are arranged at intervals in the vertical direction. The first central tube is installed between the base plate and the top plate. The top plate is connected to the bottom of the truss tower.

[0018] In some embodiments, the prefabricated foundation component further includes a plurality of diagonal braces, which are arranged at circumferential intervals along the first central tube. The bottom of the diagonal brace is connected to the base plate, and the top of the diagonal brace is connected to the top of the first central tube and the top plate.

[0019] In some embodiments, the diagonal brace includes: a body extending in a direction away from the first central cylinder along a direction from the top plate toward the bottom plate, the 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 near the first central cylinder and a second side surface away from the first central cylinder; and a connecting segment disposed on the bottom plate and extending radially along the first central cylinder, the connecting segment including a first end face and a second end face arranged opposite to each other in its extending direction, the first end face of the connecting segment being adjacent to the first central cylinder, the second end face of the connecting segment being away from the first central cylinder, the top surface of the connecting segment being connected to the body, the first end face of the connecting segment intersecting with the first side surface of the body, and the second end face of the connecting segment being spaced apart from the second side surface of the body.

[0020] In some embodiments, there are three prefabricated foundation components, and the centers of the three prefabricated foundation components are respectively located at the three vertices of a triangle.

[0021] In some embodiments, the precast concrete foundation includes a plurality of concrete support platforms and connectors connecting adjacent concrete support platforms. The connectors are connected to the post-cast strips of the concrete support platforms, and the concrete support platforms are connected to the bottom of the truss tower.

[0022] In some embodiments, the concrete support platform is generally a frustum of a cylinder, and the cross-section of the connector is generally an isosceles trapezoid.

[0023] In some embodiments, the precast concrete transition member includes a second central cylinder and a plurality of connecting arms, the plurality of connecting arms being arranged circumferentially spaced along the second central cylinder, the connecting arms extending from the outer peripheral surface of the second central cylinder toward a direction away from the second central cylinder, and the connecting arms being connected to the post-cast strip of the second central cylinder.

[0024] In some embodiments, the second central cylinder includes a plurality of precast arc-shaped members, with adjacent precast arc-shaped members connected by a post-cast strip.

[0025] In some embodiments, the bottom surface of the connecting arm is a horizontal plane, and the top surface of the connecting arm is an inclined plane that slopes downwards in a direction away from the second central cylinder.

[0026] In some embodiments, the connecting arms extend in a downward direction away from the second central cylinder, and adjacent connecting arms are connected by steel cables.

[0027] The wind turbine according to an embodiment of the second aspect of this application includes the tower assembly for a wind turbine as described in any of the above embodiments.

[0028] The construction method for a tower assembly for a wind turbine according to an embodiment of the third aspect of this application includes the following steps:

[0029] Excavate the foundation pit and construct the foundation layer;

[0030] Install a precast concrete foundation on the cushion layer;

[0031] Install the nacelle and blades of the wind turbine on a precast concrete transition piece;

[0032] The precast concrete transition piece is temporarily placed on the precast concrete foundation;

[0033] Multiple precast concrete tower components are sequentially installed between the precast concrete foundation and the precast concrete transition piece using a self-lifting method.

[0034] In some embodiments, the step of sequentially installing a plurality of precast concrete tower components between the precast concrete foundation and the precast concrete transition member includes: connecting the plurality of precast concrete tower components, connecting the lowermost precast tower component among the plurality of precast concrete tower components to the precast concrete foundation, and connecting the uppermost precast tower component among the plurality of precast concrete tower components to the precast concrete transition member. Attached Figure Description

[0035] Figure 1 This is a structural diagram of a tower assembly for a wind turbine according to an embodiment of this application.

[0036] Figure 2 yes Figure 1 The image shown is a top view of the tower assembly used for a wind turbine.

[0037] Figure 3 yes Figure 1 Structural diagram of precast concrete tower components.

[0038] Figure 4 yes Figure 3 Front view of precast concrete tower structure components.

[0039] Figure 5 yes Figure 3 Side view of precast concrete tower structure components.

[0040] Figure 6 yes Figure 1 Structural diagram of precast foundation components for precast concrete foundations.

[0041] Figure 7 yes Figure 6 Front view of the prefabricated foundation components.

[0042] Figure 8 yes Figure 6 A top view of the prefabricated foundation components.

[0043] Figure 9 yes Figure 1 Structural diagram of the precast concrete transition component.

[0044] Figure 10 yes Figure 9 Front view of the precast concrete transition piece.

[0045] Figure 11 yes Figure 9 A top view of the precast concrete transition piece.

[0046] Figure 12 yes Figure 9 Structural diagram of the second central tube of the precast concrete transition component.

[0047] Figure 13 yes Figure 9 Structural diagram of the connecting arm of the precast concrete transition piece.

[0048] Figure 14 This is a structural diagram of a tower assembly for a wind turbine according to another embodiment of this application.

[0049] Figure 15 yes Figure 14 The image shown is a top view of the tower assembly used for a wind turbine.

[0050] Figure 16 yes Figure 14 Structural diagram of precast concrete tower components.

[0051] Figure 17 yes Figure 16 Front view of precast concrete tower structure components.

[0052] Figure 18 yes Figure 16 Side view of precast concrete tower structure components.

[0053] Figure 19 yes Figure 14 Structural diagram of a precast concrete foundation.

[0054] Figure 20 yes Figure 14 Structural diagram of the precast concrete transition component.

[0055] Figure label:

[0056] Tower assembly 100, truss tower 1, precast concrete tower component 11, column 111, connecting rod 112, square ring plate 113, reinforcing member 114, precast concrete foundation 2, precast foundation component 21, bottom plate 211, first central tube 212, top plate 213, diagonal brace 214, body 2141, connecting section 2142, concrete support platform 22, connector 23, precast concrete transition component 3, second central tube 31, connecting arm 32, steel cable 33. Detailed Implementation

[0057] The embodiments of this application are described in detail below, with examples of the embodiments shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0058] like Figure 1-20As shown, the tower assembly 100 for a wind turbine according to an embodiment of this application includes a truss tower 1, a precast concrete foundation 2, and a precast concrete transition piece 3, wherein the truss tower 1 is mounted on the precast concrete foundation 2. In other words, the precast concrete foundation 2 is pre-prepared from concrete and is used to support the truss tower 1 and / or the structure above the truss tower 1.

[0059] like Figure 1-5 and Figure 14-18 As shown, the truss tower 1 includes multiple precast concrete tower components 11, which are connected sequentially with post-cast strips along the vertical direction.

[0060] Specifically, during the prefabrication process, multiple precast concrete tower components 11 can be pre-set with reinforcing bars, sleeves, and reserved holes to achieve post-cast strip connection between adjacent precast concrete tower components 11 through sleeve grouting. It is understood that this application is not limited to this, and adjacent precast concrete tower components 11 can also be connected by other methods to achieve post-cast strip connection.

[0061] The precast concrete tower frame component 11 is a frame structure and includes multiple support members, with adjacent support members connected by post-cast strips. Specifically, during the precasting process, reinforcing bars, sleeves, and reserved holes can be pre-set in the multiple support members to achieve post-cast strip connection between adjacent support members through sleeve grouting. It is understood that this application is not limited to this, and adjacent support members can also be connected by post-cast strips in other ways.

[0062] A precast concrete transition piece 3 is installed on top of the truss-type tower 1 for mounting the tower or platform. In other words, the precast concrete transition piece 3 is pre-made of concrete and can be installed on top of the truss-type tower 1. The tower or platform supporting the nacelle and blades of the wind turbine can be installed on top of the precast concrete transition piece 3.

[0063] According to the embodiments of this application, the tower assembly 100 for a wind turbine generator is configured by setting the truss tower 1 to include a plurality of precast concrete tower components 11 connected sequentially along vertically by post-cast strips, and each precast concrete tower component 11 is a frame structure and includes a plurality of support members connected to each other by post-cast strips.

[0064] Therefore, in the manufacturing process of the truss tower 1 of this application, multiple support components can be pre-prepared from concrete in a place with relatively superior processing conditions. Then, the multiple support components are connected into a frame structure by post-pouring strips to form a precast concrete tower component 11. The precast concrete tower component 11 is then transported to the construction site of the tower assembly 100. At the construction site, the multiple precast concrete components are connected in sequence by post-pouring strips to form the truss tower 1. The processing is convenient and the forming efficiency is high. Since the volume and weight of the precast concrete tower component 11 are much smaller than the volume and weight of the truss tower 1, it is easy to transport in large quantities. The manufacturing process is simple and convenient, and the cost is reduced. Moreover, the foundation and transition components are also pre-set with concrete. Therefore, the entire tower assembly 100 is simple and convenient to manufacture, has high forming efficiency, and low cost.

[0065] In some embodiments, such as Figure 1-5 As shown, the multiple support members include multiple columns 111 and multiple connecting rods 112. The multiple columns 111 extend vertically and are arranged at intervals, and the axes of the multiple columns 111 are not in the same plane. In other words, the precast concrete tower frame member 11 includes multiple columns 111 extending in the vertical direction and multiple connecting rods 112, and the axes of the multiple columns 111 are not in the same plane so that the precast concrete tower frame member 11 constitutes a frame structure.

[0066] Multiple connecting rods 112 connect adjacent columns 111 among multiple columns 111, and the connecting rods 112 are connected to the post-cast strips of the columns 111. Specifically, during the prefabrication process, the columns 111 and connecting rods 112 can be pre-set with reinforcing bars, sleeves, and reserved holes as needed, so as to achieve the connection between the connecting rods 112 and the post-cast strips of the columns 111 by grouting through the sleeves. It is understood that this application is not limited to this, and the connecting rods 112 and the columns 111 can also be connected to the post-cast strips in other ways.

[0067] The columns 111 of adjacent precast concrete tower structural members 11 are connected by post-cast strips. In other words, the connection between two adjacent precast concrete tower structural members 11 in the vertical direction is achieved by connecting the corresponding post-cast strips of the columns 111 of two adjacent precast concrete tower structural members 11 in the vertical direction.

[0068] In some specific embodiments, the precast concrete tower structure component 11 is a triangular frame structure, with three columns 111 whose axes are not in the same plane. The multiple connecting rods 112 include a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod connects the first column 111 and the second column 111, the second connecting rod connects the first column 111 and the third column 111, and the third connecting rod connects the second column 111 and the third column 111.

[0069] like Figure 1 , 3As shown in Figure -5, the precast concrete tower structure component 11 has three vertically extending columns 111, with any two adjacent columns 111 arranged at intervals, and the axes of the three columns 111 are not in the same plane. There are two first connecting rods, two second connecting rods, and two third connecting rods. One first connecting rod connects the upper end of the first column 111 and the upper end of the second column 111, and the other first connecting rod connects the upper end of the first column 111 and the lower end of the second column 111. One second connecting rod connects the upper end of the first column 111 and the upper end of the third column 111, and the other second connecting rod connects the lower end of the first column 111 and the upper end of the third column 111. One third connecting rod connects the upper end of the second column 111 and the upper end of the third column 111, and the other third connecting rod connects the upper end of the second column 111 and the lower end of the third column 111.

[0070] Furthermore, each column 111 is provided with a cavity extending along its length and penetrating through the column 111 to form a prestressed concrete hollow tube. Specifically, both ends of the prestressed concrete hollow tube are pre-equipped with reinforcing bars, sleeves, and reserved holes. When two adjacent precast concrete tower components 11 are connected vertically, the post-cast strip connection of the two adjacent prestressed concrete hollow tubes in the two precast concrete tower components 11 is achieved by grouting through the sleeves.

[0071] The specific structure of the truss tower 1 in this application is not limited to the above. Figure 1-5 The structure shown, for example in some other specific embodiments, such as Figure 14-18 As shown, the supporting member is a square annular plate 113. Multiple square annular plates 113 are not in the same plane, and adjacent square annular plates 113 are connected by post-cast strips. In other words, the precast concrete tower structure member 11 includes multiple square annular plates 113, which are not in the same plane to form a frame structure, and adjacent square annular plates 113 are connected by post-cast strips.

[0072] Specifically, during the prefabrication process, each square annular plate 113 can be pre-set with reinforcing bars, sleeves, and reserved holes as needed to achieve post-cast strip connection between adjacent square annular plates 113 through sleeve grouting. It is understood that this application is not limited to this, and adjacent square annular plates 113 can also be connected by other methods. Furthermore, the square annular plate 113 is provided with a reinforcing member 114 extending along its diagonal to enhance the strength of the square annular plate 113. Specifically, the reinforcing member 114 and the square annular plate 113 can be integrally formed.

[0073] Furthermore, there are three square annular plates 113, and any two of the three square annular plates 113 are connected to form a roughly triangular frame structure.

[0074] In some embodiments, the precast concrete tower structure component 11 has a vertical height of 8m to 16m. Specifically, in Figure 1-5 In the illustrated embodiment, the vertical height of the column 111 is 8m to 16m; or in Figure 14-18 In the embodiment shown, the vertical height of the square annular plate 113 is 8m to 16m.

[0075] The following is a reference appendix. Figure 1-8 and attached Figure 14-19 The precast concrete foundation 2 of the tower assembly 11 according to an embodiment of this application is described.

[0076] In some alternative embodiments, such as Figure 1 , 3 As shown in Figures 6-8, the precast concrete foundation 2 includes multiple precast foundation components 21, which are arranged at intervals and whose centers are not on the same straight line.

[0077] The prefabricated foundation component 21 includes a base plate 211, a first central tube 212, and a top plate 213. The base plate 211 and the top plate 213 are arranged vertically at intervals. The first central tube 212 is installed between the base plate 211 and the top plate 213. The top plate 213 is connected to the bottom of the truss-type tower 1. In other words, the first central tube 212 is located on the base plate 211, the top of the first central tube 212 is connected to the top plate 213, and the top of the top plate 213 is connected to the truss-type tower 1.

[0078] Specifically, the bottom of the first central cylinder 212 is connected to the base plate 211, and the top of the first central cylinder 212 is connected to the top plate 213 via post-cast strips. Furthermore, the bottom of the first central cylinder 212 and the base plate 211, and the top of the first central cylinder 212 and the top plate 213 are connected via sleeve grouting. It is understood that this application is not limited to this; for example, other post-cast strip methods can be used to connect the bottom of the first central cylinder 212 and the base plate 211, and the top of the first central cylinder 212 and the top plate 213.

[0079] According to the embodiments of this application, the precast concrete foundation 2 in the tower assembly 100 for wind turbine generator can be fabricated by first preparing the bottom plate 211, the first central cylinder 212 and the top plate 213 from concrete in a place with relatively good processing conditions. Then, they are connected by post-pouring strips to form the precast foundation component 21. The precast foundation component 21 is then transported to the construction site of the tower assembly 100. The processing is convenient and the forming efficiency is high, which facilitates large-scale transportation.

[0080] In some specific embodiments, the top of the top plate 213 is... Figure 1-6 The column 111 in the illustrated embodiment is correspondingly connected; the top of the top plate 213 can also be connected to... Figure 14-18 In the illustrated embodiment, the intersections of two adjacent annular plates 113 are connected accordingly. Further, a post-cast strip is connected between the bottom end of the top plate 213 and the column 111, or between the bottom end of the top plate 213 and the intersection of two adjacent annular plates 113.

[0081] Specifically, the connection between the top plate 213 and the column 111, or between the top plate 213 and the intersection of the two adjacent annular plates 113, is achieved by sleeve grouting. It is understood that this application is not limited to this; other post-cast strip methods can also be used to achieve the connection between the top plate 213 and the column 111, or between the top plate 213 and the intersection of the two adjacent annular plates 113.

[0082] In some specific embodiments, such as Figure 6-8 As shown, the outer periphery of the base plate 211, the first central cylinder 212 and the top plate 213 are all roughly circular, and the base plate 211, the first central cylinder 212 and the top plate 213 are coaxially arranged. The cross-sectional area of ​​the base plate 211 is larger than that of the top plate 213, and the cross-sectional area of ​​the top plate 213 is larger than that of the first central cylinder 212.

[0083] In some specific embodiments, such as Figure 6-8 As shown, the prefabricated foundation component 21 also includes multiple diagonal braces 214, which are arranged at intervals along the circumference of the first central tube 212. The bottom of the diagonal braces 214 is connected to the bottom plate 211, and the top of the diagonal braces 214 is connected to the top of the first central tube 212 and the top plate 213.

[0084] Further, the diagonal brace 214 includes a body 2141 and a connecting section 2142. The body 2141 extends away from the first central cylinder 212 in a direction from the top plate 213 toward the bottom plate 211, 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 surface near the first central cylinder 212 and a second side surface away from the first central cylinder 212. Figure 1 and Figure 6 As shown, the body 2141 extends outward in a downward direction, where outward refers to the direction away from the axis of the first central cylinder 212. The body 2141 includes a first side and a second side along the radial direction of the first central cylinder 212, and the first side of the body 2141 is closer to the first central cylinder 212 than the second side.

[0085] The connecting segment 2142 is disposed on the base plate 211 and extends radially along the first central cylinder 212. The connecting segment 2142 includes a first end face and a second end face arranged opposite to each other in its extending direction. The first end face of the connecting segment 2142 is adjacent to the first central cylinder 212, and the second end face of the connecting segment 2142 is away from the first central cylinder 212. In other words, the connecting segment 2142 includes a first end face and a second end face arranged opposite to each other in the radial direction of the first central cylinder 212, and the first end face of the connecting segment 2142 is closer to the first central cylinder 212 than the second end face.

[0086] The top surface of the connecting segment 2142 is connected to the body 2141, the first end face of the connecting segment 2142 intersects with the first side face of the body 2141, and the second end face of the connecting segment 2142 is spaced apart from the second side face of the body 2141. In other words, the second end face of the connecting segment 2142 does not intersect with the second side face of the body 2141.

[0087] Specifically, such as Figure 1 and 2 As shown, there are three prefabricated foundation components 21, and the centers of the three prefabricated foundation components 21 are respectively located at the vertices of a triangle. In other words, the prefabricated tower foundation 2 is composed of three prefabricated foundation components 21, and the lines connecting the centers of any two prefabricated foundation components 21 form a triangle.

[0088] It is understandable that the structure of the precast concrete foundation 2 is not limited to... Figure 1 , 2 and Figure 6-8 As shown, for example in some alternative embodiments, such as Figure 14-19 As shown, the precast concrete foundation 2 includes multiple concrete support platforms 22 and connectors 23 that connect adjacent concrete support platforms 22. The connectors 23 are connected to the post-cast strips of the concrete support platforms 22, and the concrete support platforms 22 are connected to the bottom of the truss tower 1.

[0089] In other words, adjacent concrete support platforms 22 are connected by connectors 23, and the connectors 23 are connected to the concrete support platforms 22 by post-pouring strips.

[0090] Specifically, both the concrete support platform 22 and the connector 23 can be pre-prepared from concrete, and reinforcing bars, sleeves, and reserved holes can be pre-set during the prefabrication process so that the connector 23 and the concrete support platform 22 can be connected by grouting through the sleeves. It is understood that this application is not limited to this, and other post-cast strips can also be used to connect the connector 23 and the concrete support platform 22.

[0091] According to the embodiments of this application, the precast concrete foundation 2 in the tower assembly 100 for wind turbine generator can be fabricated by first preparing concrete support platform 22 and connector 23 in a place with relatively good processing conditions, and then connecting them by means of post-pouring strip to form precast concrete foundation 2. Then the precast concrete foundation 2 is transported to the construction site of tower assembly 100. It is easy to process and has high forming efficiency, and is convenient for large-scale transportation.

[0092] In some specific embodiments, the concrete support platform 22 is connected to the bottom post-cast strip of the truss tower 1. Specifically, the concrete support platform 22 can be connected to... Figure 1-5 In the embodiment shown, the bottom end of the column 111 is connected to the corresponding post-cast strip; the concrete support platform 22 can also be connected to... Figure 14-18 In the embodiment shown, the bottom ends of the intersection of two adjacent annular plates 113 are connected by a post-cast strip.

[0093] Furthermore, the concrete support platform 22 and the column 111, or the intersection of the concrete support platform 22 and the two annular plates 113, are connected by sleeve grouting. It is understood that this application is not limited to this; other post-cast strip methods can also be used to achieve the connection between the concrete support platform 22 and the column 111, or the intersection of the concrete support platform 22 and the two annular plates 113.

[0094] In some specific embodiments, such as Figure 19 As shown, the concrete support platform 22 is generally a frustum of a cone. In other words, the cross-section of the concrete support platform 22 is circular, and the diameter of the concrete support platform 22 gradually decreases from bottom to top.

[0095] The cross-section of the connector 23 is approximately an isosceles trapezoid. Specifically, the two ends of the connector 23 along its length are connected to two concrete support platforms 22, and the width of the connector 23 gradually decreases from bottom to top.

[0096] The following is a reference appendix. Figure 1 , 2 and Figure 9-13 as well as Figure 14 , 15 and Figure 20 The precast concrete transition piece 3 of the tower assembly 100 according to an embodiment of this application is described.

[0097] In some embodiments, such as Figure 9-11 and Figure 20 As shown, 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 are arranged at intervals along the circumference of the second central cylinder 31. The connecting arms 32 extend from the outer circumferential surface of the second central cylinder 31 toward a direction away from the second central cylinder 31. The connecting arms 32 are connected to the post-pouring strip of the second central cylinder 31.

[0098] According to the embodiments of this application, the precast concrete transition piece 3 in the tower assembly 100 for wind turbine generator can be manufactured by first preparing the second central cylinder 31 and the connecting arm 32 from concrete in a place with relatively superior processing conditions, and then connecting them by means of post-pouring strip to form the precast concrete transition piece 3. Then the precast concrete transition piece 3 is transported to the construction site of the tower assembly 100. It is easy to process and has high forming efficiency, and is convenient for large-scale transportation.

[0099] For the connection between the second central cylinder 31 and the connecting arm 32, for example Figure 12 and Figure 13 As shown, the second central cylinder 31 has holes and / or sleeves on its peripheral wall during the prefabrication process, and the connecting arm 32 has reinforcing bars during the prefabrication process. When the connecting arm 32 and the second central cylinder 31 are connected, the reinforcing bars of the connecting arm 32 are first inserted into the holes or sleeves of the second central cylinder 31, and then grouting is performed to achieve the connection.

[0100] Specifically, the end of the connecting arm 32 furthest from the second central tube 31 is connected to the top of the truss tower 1. Further, the end of the connecting arm 32 furthest from the second central tube 31 can be connected to the uppermost precast concrete tower component 21 of the truss tower 1. Figure 1-5 The top of the column 111 in the illustrated embodiment is correspondingly connected; the end of the connecting arm 32 away from the second central tube 31 can also be connected to the precast concrete tower structure component 21 at the uppermost end of the truss tower 1. Figure 14-18 The top ends of the intersection of two adjacent annular plates 113 in the embodiment shown are connected accordingly.

[0101] One end of the connecting arm 32, away from the second central cylinder 31, is connected to the top post-pouring strip of the column 111, for example, by sleeve grouting. The other end of the connecting arm 32, away from the second central cylinder 31, is connected to the top post-pouring strip at the intersection of two adjacent annular plates 113, for example, by sleeve grouting.

[0102] In some specific embodiments, the second central cylinder 31 includes multiple prefabricated arc-shaped components (not shown), with adjacent prefabricated arc-shaped components connected by post-cast strips. In other words, the arcs of the multiple prefabricated arc-shaped components are generally on the same circle, and the multiple prefabricated arc-shaped components are sequentially connected by post-cast strips to form the second central cylinder 31. Specifically, any two adjacent prefabricated arc-shaped components are connected by sleeve grouting. It is understood that this application is not limited thereto.

[0103] In some specific embodiments, such as Figure 9 , 10As shown in Figure 13, the bottom surface of the connecting arm 32 is horizontal, and the top surface of the connecting arm 32 is an inclined plane sloping downwards in the direction away from the second central tube 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 upwards relative to the bottom surface. The precast concrete transition piece 3 can transfer the load of the upper wind turbine generator and the upper tower to the lower truss tower 1. According to the stress analysis, the bending moment of the connecting arm 32 is large in the part near the second central tube 31 and small in the part near the truss tower 2. In this embodiment, by making the section height of the connecting arm 32 relatively high in the part near the second central tube 31 and low in the section height near the truss tower 2, the bending and shear bearing capacity of the connecting arm 32 in the part near the second central tube 31 is improved, which can meet the stress requirements.

[0104] Specifically, there are three connecting arms 32, which are evenly spaced along the circumference of the second central cylinder 31.

[0105] It is understandable that the structure of connecting arm 32 is not limited to... Figure 9-13 The embodiments shown, for example in some specific embodiments, such as Figure 20 As shown, the connecting arm 32 extends downwards in a direction away from the second central tube 31, and adjacent connecting arms 32 are connected by steel cables 33. In other words, the connecting arm 32 is inclined downwards in a direction away from the second central tube 31, and the bottoms of any two adjacent connecting arms 32 are connected by steel cables 33. According to the stress analysis, the lower part of the connection between the precast concrete transition piece 3 and the truss tower 1 is under tension, and the upper part is under compression. Since concrete has good compressive performance and steel cables have good tensile performance, the connecting arm 32 is made of reinforced concrete, and the bottoms of adjacent connecting arms 32 are connected by steel cables to form a tensioned beam stress system.

[0106] The wind turbine according to embodiments of this application includes the tower assembly 100 for wind turbines of any of the above embodiments.

[0107] The construction method for the tower assembly of a wind turbine according to an embodiment of this application includes the following steps:

[0108] Excavate the foundation pit and construct the foundation layer;

[0109] Precast concrete foundation 2 is installed on the subbase. In other words, the precast concrete foundation 2 is prepared in advance by concrete. After the precast concrete foundation 2 is transported to the construction site of tower assembly 100, it can be installed on the subbase.

[0110] The nacelle and blades of the wind turbine are installed on the precast concrete transition piece 3. In other words, the precast concrete transition piece 3 is prepared in advance from concrete. After the precast concrete transition piece 3 is transported to the construction site of the tower assembly 100, the nacelle and blades of the wind turbine can be installed on it.

[0111] A precast concrete transition piece 3 is temporarily placed on the precast concrete foundation 2. In other words, the precast concrete transition piece 3 is temporarily placed 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.

[0112] Multiple precast concrete tower components 11 are sequentially installed between the precast concrete foundation 2 and the precast concrete transition piece 3 using a self-lifting method. In other words, the precast concrete tower components 11 are pre-prepared from concrete. After the precast concrete tower components 11 are transported to the construction site of the tower assembly 100, multiple precast concrete tower components 11 are sequentially installed using a self-lifting system to form a truss tower 1. Specifically, the self-lifting system is installed at the bottom of the precast concrete transition piece 3. The lifting component of the self-lifting system first raises the precast concrete transition piece 3 to a predetermined height and then returns to its original position. The first precast concrete tower structure component 11 is then installed on the lifting component. The lifting component raises the first precast concrete tower structure component 11 and the precast concrete transition piece 3 to a predetermined height again and then returns to its original position. The second precast concrete tower structure component 11 is then installed on the lifting component. The lifting component raises the second precast concrete tower structure component 11, the first precast concrete tower structure component 11, and the precast concrete transition piece 3 to a predetermined height again and then returns to its original position. Then the third precast concrete tower structure component 11, and so on, are installed between the precast concrete foundation 2 and the precast concrete transition piece 3 in sequence according to the above operation.

[0113] In some embodiments, the step of sequentially installing a plurality of precast concrete tower components 11 between the precast concrete foundation 2 and the precast concrete transition member 3 includes:

[0114] Connecting multiple precast concrete tower structure components 11, connecting the lowest precast tower structure component 11 and the precast concrete foundation 2, and connecting the highest precast tower structure component 11 and the precast concrete transition component 3.

[0115] Specifically, multiple precast concrete tower components 11 are connected sequentially by post-cast strips. The lowest precast concrete tower component 11 is connected to the post-cast strip of the precast concrete foundation 2, and the highest precast concrete tower component 11 is connected to the post-cast strip of the precast concrete transition component 3. More specifically, the multiple precast concrete tower components 11 are connected sequentially by sleeve grouting. The lowest precast concrete tower component 11 is connected to the precast concrete foundation 2 by sleeve grouting, and the highest precast concrete tower component 11 is connected to the precast concrete transition component 3 by sleeve grouting.

[0116] In some specific embodiments, the step of connecting multiple precast concrete tower components 11 includes: tensioning the prestressed steel bars within the precast concrete tower components 11. It is understood that this application is not limited thereto.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0118] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0119] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0120] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0121] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A tower assembly for a wind turbine generator, characterized in that, include: Precast concrete foundation; A truss-type tower, which is installed on the precast concrete foundation and includes multiple precast concrete tower components. The multiple precast concrete tower components are connected sequentially with post-cast strips along the vertical direction. The precast concrete tower components are frame structures and include multiple support members. Adjacent support members are connected with post-cast strips. A precast concrete transition piece, which is located at the top of the truss-type tower for installing the tower or platform; The precast concrete foundation includes multiple precast foundation components, which are arranged at intervals and whose centers are not on the same straight line. Each precast foundation component includes a base plate, a first central tube, and a top plate. The base plate and the top plate are arranged at intervals in the vertical direction. The first central tube is installed between the base plate and the top plate. The top plate is connected to the bottom of the truss tower. The prefabricated foundation component also includes multiple diagonal braces, which are arranged at intervals along the circumference of the first central tube. The bottom of each diagonal brace is connected to the bottom plate, and the top of each diagonal brace is connected to the top of the first central tube and the top plate. The precast concrete transition component includes a second central cylinder and a plurality of connecting arms. The plurality of connecting arms are arranged at circumferential intervals along the second central cylinder. The connecting arms extend from the outer circumferential surface of the second central cylinder in a direction away from the second central cylinder. The connecting arms are connected to the post-pouring strip of the second central cylinder. The bottom surface of the connecting arm is a horizontal plane, and the top surface of the connecting arm is an inclined plane that slopes downward in a direction away from the second central cylinder; The second central cylinder has holes and / or sleeves on its peripheral wall during the prefabrication process. The connecting arm has reinforcing bars during the prefabrication process. When the connecting arm and the second central cylinder are connected, the reinforcing bars of the connecting arm are first inserted into the holes or sleeves of the second central cylinder, and then grout is injected to achieve the connection.

2. The tower assembly for a wind turbine according to claim 1, characterized in that, The plurality of support members include a plurality of columns and a plurality of connecting rods. The plurality of columns extend along the vertical direction and are arranged at intervals. The axes of the plurality of columns are not in the same plane. The plurality of connecting rods connect adjacent columns. The connecting rods are connected to the post-cast strips of the columns. The post-cast strips of the columns of adjacent precast concrete tower structure members are connected.

3. The tower assembly for a wind turbine according to claim 2, characterized in that, The precast concrete tower structure is a triangular frame structure. There are three columns, and the axes of the three columns are not in the same plane. The multiple connecting rods include a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod connects the first column and the second column, the second connecting rod connects the first column and the third column, and the third connecting rod connects the second column and the third column.

4. The tower assembly for a wind turbine according to claim 2 or 3, characterized in that, The column has a cavity extending along its length and penetrating through the column to form a prestressed concrete hollow tube.

5. The tower assembly for a wind turbine according to claim 1, characterized in that, The support member is a square annular plate, and multiple square annular plates are not in the same plane. The post-cast strips of adjacent square annular plates are connected.

6. The tower assembly for a wind turbine according to claim 5, characterized in that, The square annular plate is provided with a reinforcing member extending along its diagonal.

7. The tower assembly for a wind turbine according to claim 5 or 6, characterized in that, There are three square annular plates, and any two of the three square annular plates are connected to form a roughly triangular frame structure.

8. The tower assembly for a wind turbine according to any one of claims 1-3, characterized in that, The precast concrete tower structure has a vertical height of 8m to 16m.

9. The tower assembly for a wind turbine according to claim 1, characterized in that, The diagonal brace includes: The body extends away from the first central cylinder along a direction from the top plate toward the bottom plate, the top of the body is connected to the top of the first central cylinder and the top plate, and the body includes a first side close to the first central cylinder and a second side away from the first central cylinder. A connecting segment is disposed on the base plate and extends radially along the first central cylinder. The connecting segment includes a first end face and a second end face arranged opposite to each other in its extending direction. The first end face of the connecting segment is adjacent to the first central cylinder, and the second end face of the connecting segment is away from the first central cylinder. The top surface of the connecting segment is connected to the body. The first end face of the connecting segment intersects with the first side surface of the body, and the second end face of the connecting segment is spaced apart from the second side surface of the body.

10. The tower assembly for a wind turbine according to any one of claims 1 and 9, characterized in that, The prefabricated foundation components consist of three parts, with the centers of the three prefabricated foundation components located at the three vertices of a triangle, respectively.

11. The tower assembly for a wind turbine according to claim 1, characterized in that, The precast concrete foundation includes multiple concrete support platforms and connectors connecting adjacent concrete support platforms. The connectors are connected to the post-cast strips of the concrete support platforms, and the concrete support platforms are connected to the bottom of the truss tower.

12. The tower assembly for a wind turbine according to claim 11, characterized in that, The concrete support platform is generally a frustum of a cylinder, and the cross-section of the connector is generally an isosceles trapezoid.

13. The tower assembly for a wind turbine according to claim 1, characterized in that, The second central cylinder includes multiple precast arc-shaped components, and adjacent precast arc-shaped components are connected by a post-cast strip.

14. A wind turbine generator, characterized in that, Includes a tower assembly for a wind turbine according to any one of claims 1-13.

15. A construction method for a tower assembly of a wind turbine, characterized in that, Includes the following steps: Excavate the foundation pit and construct the foundation layer; Install a precast concrete foundation on the cushion layer; Install the nacelle and blades of the wind turbine on a precast concrete transition piece; The precast concrete transition piece is temporarily placed on the precast concrete foundation; Multiple precast concrete tower components are sequentially installed between the precast concrete foundation and the precast concrete transition piece using a self-lifting method; The precast concrete foundation includes multiple precast foundation components, which are arranged at intervals and whose centers are not on the same straight line. Each precast foundation component includes a bottom plate, a first central tube, and a top plate. The bottom plate and the top plate are arranged at intervals in the vertical direction. The first central tube is installed between the bottom plate and the top plate. The top plate is connected to the bottom of the precast concrete tower. The prefabricated foundation component also includes multiple diagonal braces, which are arranged at intervals along the circumference of the first central tube. The bottom of each diagonal brace is connected to the bottom plate, and the top of each diagonal brace is connected to the top of the first central tube and the top plate. The precast concrete transition component includes a second central cylinder and a plurality of connecting arms. The plurality of connecting arms are arranged at circumferential intervals along the second central cylinder. The connecting arms extend from the outer circumferential surface of the second central cylinder in a direction away from the second central cylinder. The connecting arms are connected to the post-pouring strip of the second central cylinder. The bottom surface of the connecting arm is a horizontal plane, and the top surface of the connecting arm is an inclined plane that slopes downward in a direction away from the second central cylinder; The second central cylinder has holes and / or sleeves on its peripheral wall during the prefabrication process. The connecting arm has reinforcing bars during the prefabrication process. When the connecting arm and the second central cylinder are connected, the reinforcing bars of the connecting arm are first inserted into the holes or sleeves of the second central cylinder, and then grout is injected to achieve the connection.

16. A construction method for a tower assembly for a wind turbine according to claim 15, characterized in that, The step of sequentially installing multiple precast concrete tower components between the precast concrete foundation and the precast concrete transition piece includes: connecting the multiple precast concrete tower components, connecting the lowermost precast tower component among the multiple precast concrete tower components to the precast concrete foundation, and connecting the uppermost precast tower component among the multiple precast concrete tower components to the precast concrete transition piece.

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