A tower for a wind turbine

Abstract

The present invention provides a tower for a wind turbine, which includes a support frame. The support frame includes three steel columns arranged in a triangular shape, and a reinforcing web member assembly is connected between every two adjacent steel columns; each steel column is sequentially connected by a plurality of telescopic steel pipe assemblies, and each telescopic steel pipe assembly includes an outer steel column connection section and an inner steel column connection section. In the transportation state, the inner steel column connection section contracts inside the outer steel column connection section; in the installation state, the inner steel column connection section extends out of the outer steel column connection section, and the lower end of the inner steel column connection section is connected to the upper end of the outer steel column connection section. The tower for a wind turbine provided by the present invention can solve the problems of inconvenient transportation and high transportation cost of existing wind turbine towers.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a tower for a wind turbine. Background Art

[0002] In a wind power project, a wind turbine tower is a support structure of a wind power generation unit, mainly used to support the weight of the unit and convert wind energy into electrical energy. The height of the tower depends on the size of the wind turbine and the expected wind energy resources, and can reach dozens of meters or even hundreds of meters. With the rapid development of wind turbines, the size design of traditional wind turbine towers is getting larger and larger, resulting in longer steel columns that make up the wind turbine tower. Such large-sized steel columns are not only inconvenient to transport, but also have a relatively high transportation cost. Summary of the Invention

[0003] An object of the present invention is to provide a tower for a wind turbine, which can solve the problems of inconvenient transportation and relatively high transportation cost of existing wind turbine towers.

[0004] The present invention provides a tower for a wind turbine, including a support frame. The support frame includes three steel columns arranged in a triangle, and a reinforcing web member assembly is connected between every two adjacent steel columns; each steel column is sequentially connected by a plurality of telescopic steel pipe assemblies, and each telescopic steel pipe assembly includes an outer steel column connection section and an inner steel column connection section. In the transportation state, the inner steel column connection section shrinks into the outer steel column connection section; in the installation state, the inner steel column connection section extends out of the outer steel column connection section, and the lower end of the inner steel column connection section is connected to the upper end of the outer steel column connection section.

[0005] According to the tower for a wind turbine provided by the present invention, a first outer connection flange is fixedly provided at the lower end outside the outer steel column connection section, and a plurality of first connection bolts are fixedly provided on the first outer connection flange, and the ends of the first connection bolts face downward; a first inner connection flange is fixedly provided at the upper end inside the outer steel column connection section, and a plurality of first connection holes are provided on the first inner connection flange.

[0006] According to the tower for a wind turbine provided by the present invention, a second outer connection flange is fixedly provided at the lower end outside the inner steel column connection section, and a plurality of second connection bolts are fixedly provided on the second outer connection flange, and the ends of the second connection bolts face upward, and the second connection bolts respectively correspond to the first connection holes; a second inner connection flange is fixedly provided at the upper end inside the inner steel column connection section, and a plurality of second connection holes are provided on the second inner connection flange.

[0007] According to a tower for a wind turbine provided by the present invention, the second outer connection flange is disposed within the outer steel column connection section, and the second outer connection flange is capable of slidingly mating with the inner sidewall of the outer steel column connection section; the upper end of the inner steel column connection section passes through the first inner connection flange and is disposed outside the outer steel column connection section; in the installed state, the upper end surface of the second outer connection flange corresponds and mates with the lower end surface of the first inner connection flange, and each of the second connection bolts passes through each of the first connection holes and is fastened by a connection nut.

[0008] According to a tower for a wind turbine provided by the present invention, the steel column at least includes a first telescopic steel pipe assembly and a second telescopic steel pipe assembly that are sequentially connected from bottom to top; in the installed state, the lower end surface of the first outer connection flange of the second telescopic steel pipe assembly corresponds and mates with the upper end surface of the second inner connection flange of the first telescopic steel pipe assembly, and each of the first connection bolts of the second telescopic steel pipe assembly passes through each of the second connection holes of the first telescopic steel pipe assembly and is fastened by a connection nut.

[0009] According to a tower for a wind turbine provided by the present invention, the outer steel column connection section is a square steel pipe, and the inner steel column connection section is a square steel pipe adapted to the outer steel column connection section.

[0010] According to a tower for a wind turbine provided by the present invention, the reinforcing web member assembly includes a plurality of transverse web members connected between two adjacent steel columns, the plurality of transverse web members are sequentially spaced apart along the length direction of the steel column, and the plurality of transverse web members are connected by longitudinal web members; two inclined web members are provided between every two adjacent transverse web members up and down, the lower ends of the two inclined web members are respectively connected to the two ends of the lower transverse web member in correspondence, and the upper ends of the two inclined web members are both connected to the connection point between the longitudinal web member and the upper transverse web member.

[0011] According to a tower for a wind turbine provided by the present invention, it further includes a connection seat and a tower barrel, the upper end of the support frame is connected to the lower end of the connection seat, and the upper end of the connection seat is connected to the lower end of the tower barrel.

[0012] According to a tower for a wind turbine provided by the present invention, the lower end of the connection seat is provided with three connection columns, each of the connection columns corresponds to each of the steel columns one by one, the lower ends of each of the connection columns are respectively provided with connection column flanges, the upper ends of each of the steel columns are respectively provided with steel column flanges, and each of the steel column flanges is respectively connected to each of the connection column flanges in correspondence.

[0013] According to a tower for a wind turbine provided by the present invention, a connecting seat flange is provided at the upper end of the connecting seat, a tower barrel flange is provided at the lower end of the tower barrel, and the tower barrel flange is connected to the connecting seat flange.

[0014] For the tower for a wind turbine provided by the present invention, the support frame is formed by arranging three steel columns in a triangular shape, and a reinforcing web member assembly is provided between every two adjacent steel columns to improve the overall structural strength and stiffness of the support frame; each steel column is sequentially connected by a plurality of telescopic steel pipe assemblies, and each telescopic steel pipe assembly includes an outer steel column connecting section and an inner steel column connecting section. In the transportation state, the inner steel column connecting section shrinks inside the outer steel column connecting section, with a smaller size, reducing the floor area and facilitating transportation; in the installation state, the inner steel column connecting section is extended from inside the outer steel column connecting section, and the lower end of the inner steel column connecting section is connected to the upper end of the outer steel column connecting section, thereby realizing the extended installation of the telescopic steel pipe assembly, which is convenient for assembly and has reliable connection. Thus, the tower for a wind turbine provided by the present invention solves the problem of difficult transportation of ultra-high towers and effectively reduces the transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the tower for a wind turbine of the present invention;

[0017] Figure 2 It is a schematic cross-sectional view of the support frame in the tower for a wind turbine of the present invention;

[0018] Figure 3 It is an installation schematic diagram of the connecting seat and the tower barrel in the tower for a wind turbine of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the connecting seat in the tower for a wind turbine of the present invention;

[0020] Figure 5 It is a top view of the connecting seat in the tower for a wind turbine of the present invention;

[0021] Figure 6 It is a bottom view of the connecting seat in the tower for a wind turbine of the present invention;

[0022] Figure 7 It is a schematic diagram of the contracted state of the telescopic steel pipe assembly in the tower for a wind turbine of the present invention;

[0023] Figure 8 This is a schematic diagram of the installation state of the telescopic steel pipe assembly in the tower for the wind turbine of the present invention.

[0024] Explanation of the reference numerals in the drawings:

[0025] 100, support frame; 200, connecting seat; 300, tower barrel; 400, nacelle; 500, hub; 600, wind turbine blade;

[0026] 1, steel column; 101, outer steel column connection section; 102, inner steel column connection section; 103, first outer connection flange; 104, first connection bolt; 105, first inner connection flange; 106, second outer connection flange; 107, second connection bolt; 108, second inner connection flange;

[0027] 2, transverse web member; 3, longitudinal web member; 4, inclined web member; 5, connecting column; 6, connecting column flange; 7, connecting seat flange; 8, tower barrel flange. Detailed implementation manners

[0028] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As Figures 1 to 8 shown, the tower for a wind turbine according to an embodiment of the present invention includes a support frame 100, and the support frame 100 includes three steel columns 1 arranged in a triangle. A reinforcing web member assembly is connected between every two adjacent steel columns 1 to improve the overall structural strength and stiffness of the support frame 100.

[0032] Among them, each steel column 1 is successively connected by a plurality of telescopic steel pipe assemblies, and each telescopic steel pipe assembly includes an outer steel column connection section 101 and an inner steel column connection section 102. When each telescopic steel pipe assembly is in a transportation state, the inner steel column connection section 102 shrinks into the outer steel column connection section 101, so the size is smaller, reducing the floor area and facilitating transportation. When each telescopic steel pipe assembly is in an installation state, the inner steel column connection section 102 is extended from the outer steel column connection section 101, and the lower end of the inner steel column connection section 102 is connected to the upper end of the outer steel column connection section 101, so as to realize the extended installation of the telescopic steel pipe assembly, which is convenient for assembly and has reliable connection.

[0033] Thus, the tower for a wind turbine according to an embodiment of the present invention solves the problem of difficult transportation of ultra-high towers and effectively reduces the transportation cost.

[0034] In some embodiments of the present invention, a first outer connection flange 103 is fixedly provided at the lower end of the outer side of the outer steel column connection section 101, and a plurality of first connection bolts 104 are fixedly provided on the first outer connection flange 103, and the ends of the first connection bolts 104 face downward. A first inner connection flange 105 is fixedly provided at the upper end of the inner side of the outer steel column connection section 101, and a plurality of first connection holes are provided on the first inner connection flange 105. By fixedly providing a plurality of first connection bolts 104 on the first outer connection flange 103, it is convenient to realize the successive connection between a plurality of telescopic steel pipe assemblies.

[0035] Wherein, a second outer connection flange 106 is fixedly provided at the lower outer end of the inner steel column connection section 102. A plurality of second connection bolts 107 are fixedly provided on the second outer connection flange 106. The ends of the second connection bolts 107 face upward, and the second connection bolts 107 respectively correspond to the first connection holes, so as to realize reliable connection between the outer steel column connection section 101 and the inner steel column connection section 102 in the same telescopic steel pipe assembly. A second inner connection flange 108 is fixedly provided at the upper inner end of the inner steel column connection section 102. A plurality of second connection holes are provided on the second inner connection flange 108. In two cooperating telescopic steel pipe assemblies, the first connection bolts 104 of one telescopic steel pipe assembly correspond to the second connection holes of the other telescopic steel pipe assembly, so as to realize reliable connection and assembly between the two telescopic steel pipe assemblies.

[0036] Wherein, the second outer connection flange 106 is arranged inside the outer steel column connection section 101, and the second outer connection flange 106 can be in sliding fit with the inner side wall of the outer steel column connection section 101. The upper end of the inner steel column connection section 102 passes through the first inner connection flange 105 and is arranged outside the outer steel column connection section 101. In the installation state, the upper end face of the second outer connection flange 106 corresponds and cooperates with the lower end face of the first inner connection flange 105, and the second connection bolts 107 respectively pass through the first connection holes and are tightened by connection nuts. That is to say, because the second outer connection flange 106 corresponds and cooperates with the first inner connection flange 105, the lower end of the inner steel column connection section 102 can be prevented from coming out of the outer steel column connection section 101. Since the second connection bolts 107 are all fixedly installed on the second outer connection flange 106, during installation, there is no need to separately install connection bolts for connecting the second outer connection flange 106 and the first inner connection flange 105. When the inner steel column connection section 102 is extended from the outer steel column connection section 101, only need to make each second connection bolt 107 pass through each first connection hole correspondingly, and then tighten each second connection bolt 107 respectively through the connection nuts. The installation construction is convenient, effectively improving the construction efficiency.

[0037] Specifically, the steel column 1 at least includes a first telescopic steel pipe assembly and a second telescopic steel pipe assembly that are connected in sequence from bottom to top. In the installation state, the lower end face of the first outer connection flange 103 of the second telescopic steel pipe assembly corresponds and mates with the upper end face of the second inner connection flange 108 of the first telescopic steel pipe assembly, and each first connection bolt 104 of the second telescopic steel pipe assembly passes through each second connection hole of the first telescopic steel pipe assembly and then is fastened by a connection nut, thereby realizing a reliable connection and assembly between the first telescopic steel pipe assembly and the second telescopic steel pipe assembly. Since each first connection bolt 104 is fixedly installed on the first outer connection flange 103, during installation, there is no need to separately install connection bolts for connecting the first outer connection flange 103 and the second inner connection flange 108. Only the first outer connection flange 103 and the second inner connection flange 108 need to be butted and each first connection bolt 104 is correspondingly passed through each second connection hole, and then each first connection bolt 104 is respectively fastened by a connection nut. The installation construction is convenient, effectively improving the construction efficiency.

[0038] Since the outer steel column connection section 101 of the second telescopic steel pipe assembly needs to be connected and assembled with the inner steel column connection section 102 of the first telescopic steel pipe assembly, the sizes of the respective telescopic steel pipe assemblies arranged in sequence from bottom to top correspondingly decrease in sequence.

[0039] Specifically, the outer steel column connection section 101 is a square steel pipe, and the inner steel column connection section 102 is a square steel pipe adapted to the outer steel column connection section 101. Thus, when the inner steel column connection section 102 and the outer steel column connection section 101 cooperate and extend, a limiting effect can be achieved. When the inner steel column connection section 102 extends from the outer steel column connection section 101, each second connection bolt 107 can directly pass through the corresponding first connection hole without further adjustment, and the operation is convenient.

[0040] In some embodiments of the present invention, the strengthening web member assembly includes a plurality of transverse web members 2 connected between two adjacent steel columns 1. The plurality of transverse web members 2 are respectively arranged at intervals in sequence along the length direction of the steel column 1, and the plurality of transverse web members 2 are connected by longitudinal web members 3. Two inclined web members 4 are provided between every two adjacent transverse web members 2 up and down. The lower ends of the two inclined web members 4 are respectively connected to the two ends of the transverse web member 2 located below in correspondence, and the upper ends of the two inclined web members 4 are both connected to the connection part between the longitudinal web member 3 and the transverse web member 2 located above. That is to say, by respectively arranging the transverse web member 2, the longitudinal web member 3, and the inclined web member 4 between three steel columns 1, not only the overall structural strength and stiffness of the support frame 100 are improved, but also the overall stability and reliability of the support frame 100 are improved, meeting the bearing capacity of the fan unit.

[0041] In some embodiments of the present invention, the tower for a wind turbine further includes a connecting seat 200 and a tower barrel 300. The upper end of the support frame 100 is connected to the lower end of the connecting seat 200, and the upper end of the connecting seat 200 is connected to the lower end of the tower barrel 300. By sequentially arranging the connecting seat 200 and the tower barrel 300 on the support frame 100, the overall height of the tower is further increased, and the structure is stable and reliable, meeting the installation requirements of megawatt-class wind turbine units.

[0042] Among them, three connecting columns 5 are provided at the lower end of the connecting seat 200. Each connecting column 5 corresponds to each steel column 1 respectively. Connecting column flanges 6 are provided at the lower ends of the respective connecting columns 5, and steel column flanges are provided at the upper ends of the respective steel columns 1. The respective steel column flanges are respectively connected to the respective connecting column flanges 6, thereby realizing the stable and reliable installation of the connecting seat 200 on the support frame 100.

[0043] Among them, a connecting seat flange 7 is provided at the upper end of the connecting seat 200, and a tower barrel flange 8 is provided at the lower end of the tower barrel 300. The tower barrel flange 8 is connected to the connecting seat flange 7, thereby realizing the stable and reliable installation of the tower barrel 300 on the connecting seat 200.

[0044] Among them, the connecting seat 200 adopts a hollow steel cylinder structure, and the cross-section of the connecting seat 200 is set to be hexagonal, so as to be adapted to the support frame 100.

[0045] Among them, the cross-section of the tower barrel 300 gradually decreases from bottom to top, so that the tower barrel 300 as a whole has a conical structure, further improving the structural stability and reliability of the tower barrel 300.

[0046] Specifically, a nacelle 400 is installed at the upper end of the tower barrel 300, a hub 500 is installed on the nacelle 400, and wind turbine blades 600 are installed on the hub 500.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tower for a wind turbine, characterized in that: The support frame comprises three steel columns arranged in a triangle, and a reinforcing web assembly is connected between each two adjacent steel columns; each of the steel columns is formed by connecting a plurality of telescopic steel pipe assemblies in sequence, and each of the telescopic steel pipe assemblies comprises an outer steel column connecting section and an inner steel column connecting section, and in the transport state, the inner steel column connecting section is retracted in the outer steel column connecting section; in the installation state, the inner steel column connecting section extends out from the outer steel column connecting section, and the lower end of the inner steel column connecting section is connected to the upper end of the outer steel column connecting section; A first outer connecting flange is fixedly provided at the lower end of the outer side of the outer steel column connecting section, and a plurality of first connecting bolts are fixedly provided on the first outer connecting flange, and the ends of the first connecting bolts are downward; a first inner connecting flange is fixedly provided at the upper end of the inner side of the outer steel column connecting section, and a plurality of first connecting holes are provided on the first inner connecting flange; A second outer connecting flange is fixedly provided at the lower end of the outer side of the inner steel column connecting section, and a plurality of second connecting bolts are fixedly provided on the second outer connecting flange, the ends of the second connecting bolts are upward, and the second connecting bolts correspond to the first connecting holes respectively; a second inner connecting flange is fixedly provided at the upper end of the inner side of the inner steel column connecting section, and a plurality of second connecting holes are provided on the second inner connecting flange; The second outer connecting flange is arranged in the outer steel column connecting section, and the second outer connecting flange can be slidably matched with the inner side wall of the outer steel column connecting section; the upper end of the inner steel column connecting section passes through the first inner connecting flange and is arranged outside the outer steel column connecting section; in the installed state, the upper end surface of the second outer connecting flange corresponds to the lower end surface of the first inner connecting flange, and each of the second connecting bolts passes through each of the first connecting holes and is tightened by a connecting nut; The steel column at least includes a first telescopic steel pipe assembly and a second telescopic steel pipe assembly connected in sequence from bottom to top; in the installed state, the lower end surface of the first outer connecting flange of the second telescopic steel pipe assembly corresponds to the upper end surface of the second inner connecting flange of the first telescopic steel pipe assembly, and each of the first connecting bolts of the second telescopic steel pipe assembly passes through each of the second connecting holes of the first telescopic steel pipe assembly and is fastened by a connecting nut; It also includes a connecting seat and a tower, wherein the upper end of the support frame is connected to the lower end of the connecting seat, and the upper end of the connecting seat is connected to the lower end of the tower; Three connecting columns are provided at the lower end of the connecting seat, and each connecting column corresponds to each steel column one by one. A connecting column flange is provided at the lower end of each connecting column, and a steel column flange is provided at the upper end of each steel column. Each steel column flange is connected to the corresponding connecting column flange.

2. The wind turbine tower according to claim 1, characterized in that: The outer steel column connecting section is a square steel pipe, and the inner steel column connecting section is a square steel pipe matched with the outer steel column connecting section.

3. The wind turbine tower according to claim 1, characterized in that: The reinforced web assembly includes a plurality of transverse webs connected between two adjacent steel columns, the plurality of transverse webs are arranged in sequence along the length direction of the steel column, and the plurality of transverse webs are connected by longitudinal webs; two inclined webs are arranged between each two adjacent transverse webs, the lower ends of the two inclined webs are respectively connected to the two ends of the transverse web located below, and the upper ends of the two inclined webs are connected to the connection between the longitudinal web and the transverse web located above.

4. The wind turbine tower according to claim 1, characterized in that: A connecting seat flange is provided at the upper end of the connecting seat, a tower flange is provided at the lower end of the tower, and the tower flange is connected to the connecting seat flange.

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