Forming methods for tower sections, tower frames, wind turbine generator sets, and tower frames.

Abstract

This invention relates to a tower section, a tower, a wind turbine generator set, and a method for forming the tower. The tower section includes: an inner cylinder with a hollow cavity; an outer cylinder fitted outside the inner cylinder, the outer cylinder including a first cylinder body and multiple connectors disposed on the first cylinder body; the first cylinder body and the inner cylinder body being spaced apart in the radial direction of the inner cylinder body to form an annular cavity; and a filler filling the annular cavity, the filler being fixedly connected to the inner cylinder body and the first cylinder body and covering at least a portion of each connector; wherein, along the radial direction of the inner cylinder body, the first cylinder body includes multiple interconnected winding layers, each connector including an intersecting and interconnected fixing part and a transition part, the fixing part being radially clamped and fixed between two adjacent winding layers, and the transition part protruding from the first cylinder body and inserted and fixed into the filler body. This invention can avoid problems such as water leakage and high assembly and construction costs in tower construction.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, and in particular to a method for forming a tower section, a tower frame, a wind turbine generator set, and a tower frame. Background Technology

[0002] As the capacity and rotor diameter of wind turbine generators continue to increase, the load supported by the towers also increases. Steel-concrete towers, with their superior material mechanical properties and economic efficiency, have led to a continuous increase in the height of onshore wind turbine towers, and correspondingly, a continuous increase in the diameter of the towers.

[0003] The tower sections of steel-concrete towers typically require molds for forming. However, due to the cost of molds, it is not possible to set up molds in every area where wind turbine generators need to be constructed. Therefore, the tower sections are usually formed in areas with molds and then transported to the location of the wind turbine generator assembly by transport vehicles and other transportation equipment.

[0004] However, as the diameter of the tower continues to increase, it needs to be divided into multiple pieces to meet transportation requirements. However, the multi-piece structure brings problems such as water leakage and high assembly and construction costs to the tower. Summary of the Invention

[0005] This invention provides a tower section, a tower frame, a wind turbine generator set, and a tower frame forming method. The tower section can alleviate problems such as water leakage and high assembly and construction costs associated with tower frames.

[0006] On one hand, according to an embodiment of the present invention, a tower section is provided, comprising: an inner cylinder having a hollow cavity; an outer cylinder sleeved on the outside of the inner cylinder, the outer cylinder including a first cylinder body and a plurality of connecting members disposed on the first cylinder body, the first cylinder body and the inner cylinder body being spaced apart from each other in the radial direction of the inner cylinder body and forming an annular cavity; a filler filling the annular cavity, the filler being fixedly connected to the inner cylinder body and the first cylinder body and covering at least a portion of each connecting member; wherein, along the radial direction of the inner cylinder body, the first cylinder body includes multiple interconnected winding layers, each connecting member including a fixing part and a transition part intersecting and connected, the fixing part being radially clamped and fixed between two adjacent winding layers, and the transition part protruding from the first cylinder body and inserted and fixed into the filler body.

[0007] According to one aspect of the present invention, a plurality of connectors are grouped and arranged to form a plurality of connection assemblies. Each connection assembly includes at least two connectors distributed circumferentially along the inner cylinder. The plurality of connection assemblies are arranged axially along the inner cylinder. The connectors of adjacent connection assemblies are staggered in the circumferential direction and partially overlap in the axial direction.

[0008] According to one aspect of the present invention, the fixing part extends axially along the inner cylinder, and the fixing part is provided with a transition part at each end of the axial direction. The transition part includes a transition section and a limiting section distributed radially. The transition section connects the fixing part and the limiting section, and is radially directed from the outer cylinder to one side of the inner cylinder. The width dimension of the limiting section decreases.

[0009] According to one aspect of the present invention, along the circumference of the inner cylinder, both sides of the limiting section protrude from the transition section, and the limiting section is provided with a barb groove. The barb groove starts from the side of the limiting section facing the outer cylinder and is recessed towards the side where the inner cylinder is located. Both the transition section and the limiting section are inserted into the filler, and the filler is at least partially engaged in the barb groove.

[0010] According to one aspect of the present invention, the adapter portion is capable of bending and deforming under a predetermined pressure and can return to its initial state after the pressure is removed.

[0011] According to one aspect of the present invention, the adapter includes either a fiber sheet or a metal sheet.

[0012] According to one aspect of the present invention, the first cylinder body includes a first cylinder segment and a second cylinder segment that are axially distributed and connected to each other along the inner cylinder body, the radial dimension of the first cylinder segment is larger than the radial dimension of the second cylinder segment, and a stepped surface connects the first cylinder segment and the second cylinder segment.

[0013] According to one aspect of the present invention, the tower section further includes a connecting cage, which is sleeved on the inner cylinder and covers the filling body.

[0014] According to one aspect of the present invention, the inner cylinder includes a second cylinder body and a protrusion disposed on the side of the second cylinder body facing the outer cylinder body, and the connecting cage includes a plurality of prefabricated parts, each prefabricated part being hung on the protrusion, and adjacent prefabricated parts being connected to each other.

[0015] According to one aspect of the present invention, the protrusion includes a plurality of protrusions, which are spaced apart along the axial direction of the inner cylinder. Each protrusion is annular and arranged around the axis of the inner cylinder. Each protrusion is provided with a preform, and each preform is axially supported on at least one protrusion.

[0016] According to one aspect of the present invention, the protrusion includes a plurality of protrusions, which are distributed at intervals along the circumference of the inner cylinder. Each protrusion is strip-shaped and extends along the axial direction of the inner cylinder. Each protrusion is provided with a preform, and each preform is supported on at least one protrusion in the circumference of the inner cylinder.

[0017] According to one aspect of the present invention, the winding layer includes a fiber layer, and the inner cylinder includes one of a concrete body, a fiber body, and a metal body.

[0018] On the other hand, according to embodiments of the present invention, a method for forming a tower section is proposed, comprising:

[0019] A bottom support is provided, which has a supporting surface;

[0020] An inner cylinder is provided on the support surface, and the inner cylinder has a hollow cavity;

[0021] An outer cylinder is provided outside the inner cylinder. The outer cylinder includes a first cylinder body supported on a support surface and a plurality of connecting parts disposed on the first cylinder body. The first cylinder body includes multiple layers of interconnected winding layers. The first cylinder body and the inner cylinder are spaced apart from each other and form an annular cavity. Each connecting part includes a fixing part and a transition part that are intersected and connected. The fixing part is clamped and fixed between two adjacent winding layers, and the transition part is located in the hollow cavity.

[0022] Slurry is injected into the hollow cavity. After the slurry solidifies, it forms a filler that connects and fixes the inner cylinder and the outer cylinder. The filler covers the transition part.

[0023] Remove the bottom support to form the tower section.

[0024] According to another aspect of the present invention, prior to the step of fitting an outer cylinder onto an inner cylinder, the method further includes:

[0025] Provide support cylinder;

[0026] n layers of fiber are wound around the outside of the support cylinder, and adjacent fiber layers are connected and fixed to form an initial cylinder blank with n winding layers, n≥1;

[0027] Separate the initial cylindrical blank from the support cylinder;

[0028] Multiple connectors are provided, and each connector is inserted into the initial cylindrical blank from the outer periphery of the initial cylindrical blank, so that the fixing part abuts against the nth winding layer and the transition part protrudes from the inner wall surface of the initial cylindrical blank;

[0029] m fiber layers are wound around the outside of the nth winding layer, and adjacent fiber layers are connected and fixed to form the outer cylinder, where m ≥ 1.

[0030] According to another aspect of the present invention, prior to the step of fitting an outer cylinder onto an inner cylinder, the forming method further includes:

[0031] Multiple prefabricated components are available;

[0032] Multiple prefabricated components are hung on the outer periphery of the inner cylinder, and adjacent prefabricated components are connected to form a connecting cage that fits into the inner cylinder.

[0033] According to another aspect of the present invention, the first cylinder body includes a first cylinder segment and a second cylinder segment that are axially distributed and connected to the inner cylinder body, the radial dimension of the first cylinder segment is larger than the radial dimension of the second cylinder segment, and the support surface includes a first sub-support surface and a second sub-support surface, the first sub-support surface being axially protruding from the second sub-support surface.

[0034] Prior to the step of injecting grout into the hollow cavity, the method also includes:

[0035] Both the inner cylinder and the second cylinder section are supported on the first sub-support surface, and the first cylinder section is set to protrude from the inner cylinder and supported on the second sub-support surface.

[0036] Provide a binding device, and bind the binding device to at least the first cylinder section so that the outer cylinder body is fitted to the outer peripheral surface of the bottom support.

[0037] In another aspect, according to an embodiment of the present invention, a tower is provided, including the tower sections described above, wherein multiple tower sections are stacked on top of each other and connected to each other.

[0038] Furthermore, according to an embodiment of the present invention, a wind turbine generator set is provided, including the aforementioned tower.

[0039] According to the tower section, tower, wind turbine generator set, and tower forming method provided by the embodiments of the present invention, the tower section includes an inner cylinder, an outer cylinder, and a filler. The outer cylinder is sleeved on the outside of the inner cylinder and includes a first cylinder body and multiple connectors. The first cylinder body and the inner cylinder body are spaced apart to form an annular cavity for accommodating the filler. The filler fixes the inner cylinder body and the outer cylinder body together. Since the first cylinder body includes multiple interconnected winding layers, each connector includes a fixing part and a transition part that are intersected and connected. The fixing part is radially clamped and fixed between two adjacent winding layers, and the transition part protrudes from the first cylinder body and is inserted and fixed in the filler. This allows the outer cylinder body to be formed by winding multiple winding layers to ensure the connection and fixation between the first cylinder body and each connector. The transition part is inserted and fixed in the filler, which not only ensures the connection requirements between the various parts of the tower section, but also eliminates the need for mold forming. It can be formed by winding in the pre-assembled area of ​​the wind turbine generator set, eliminating the need for transportation and segmented assembly, and is not limited by transportation height or assembly cost. Furthermore, this type of outer cylinder structure can reduce the probability of water leakage in the applied tower. Attached Figure Description

[0040] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present invention;

[0042] Figure 2 This is a top view of a tower section according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the outer cylinder of a tower section according to an embodiment of the present invention;

[0044] Figure 4 This is a partial structural schematic diagram of a tower section according to an embodiment of the present invention;

[0045] Figure 5 This is a schematic diagram of the inner cylinder of one embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the structure of a connector according to an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram showing the distribution of connectors according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of a prefabricated component according to an embodiment of the present invention;

[0049] Figure 9 This is a schematic flowchart of a tower section forming method according to an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the structure of the bottom support provided in the molding method of one embodiment of the present invention;

[0051] Figure 11 This is a schematic flowchart of a method for forming an outer cylinder according to an embodiment of the present invention;

[0052] Figure 12 This is a schematic diagram of the structure of the binding component provided in the molding method of one embodiment of the present invention.

[0053] Marker explanation:

[0054] 10. Tower; 20. Nacelle; 30. Generator; 40. Impeller; 410. Hub; 420. Blade;

[0055] 100. Tower section;

[0056] 110. Inner cylinder; 111. Second cylinder body; 112. Protrusion;

[0057] 120. Outer cylinder; 121. First cylinder body; 1211. First cylinder section; 1212. Second cylinder section; 122. Connector; 122a. Connecting assembly; 1221. Fixing part; 1222. Adapter part; 1222a. Adapter section; 1222b. Limiting section; 1222c. Barbed groove;

[0058] 130. Filler;

[0059] 140. Connecting cage; 141. Precast component; 1411. Annular connecting rod; 1412. Vertical connecting rod;

[0060] 50. Bottom support; 51. Support surface;

[0061] 60. Binding components;

[0062] X, axial direction; Y, circumferential direction; Z, radial direction. Detailed Implementation

[0063] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the accompanying drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the invention; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0064] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the tower section, tower frame, wind turbine generator set, and tower forming method of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0065] Please see Figure 1 This invention provides a wind turbine generator set, including a tower 10, a nacelle 20, a generator 30, and a rotor 40. The tower 10 is connected to a wind turbine foundation, the nacelle 20 is located at the top of the tower 10, and the generator 30 is located within the nacelle 20. In some examples, the generator 30 may be at least partially located outside the nacelle 20; conversely, in some examples, the generator 30 may be at least partially located inside the nacelle 20. The rotor 40 includes a hub 410 and a plurality of blades 420 connected to the hub 410. When wind power acts on the blades 420, it drives the entire rotor 40 to rotate, further driving the power generation device to convert wind energy into electrical energy.

[0066] One embodiment of this application also provides a tower 10, including multiple tower sections 100, which are stacked and connected to each other. The top tower section 100 can be used to connect to the nacelle 20 to meet the support requirements of components such as the nacelle 20, generator 30, and impeller 40.

[0067] As the capacity and rotor diameter of wind turbine generators continue to increase, the load supported by the towers also increases. Steel-concrete towers, with their superior material mechanical properties and economic efficiency, have led to a continuous increase in the height of onshore wind turbine towers, and correspondingly, a continuous increase in the diameter of the towers.

[0068] The tower sections of steel-concrete towers typically require molds for forming. However, due to the cost of molds, it is not possible to set up molds in every area where wind turbine generators need to be constructed. Therefore, the tower sections are usually formed in areas with molds and then transported to the location of the wind turbine generator assembly by transport vehicles and other transportation equipment.

[0069] However, as the diameter of the tower continues to increase, it needs to be divided into multiple pieces to meet transportation requirements. However, the multi-piece structure brings problems such as water leakage and high assembly and construction costs to the tower.

[0070] Based on this, one embodiment of this application also provides a new tower section 100, which can alleviate problems such as water leakage in the tower and high assembly and construction costs.

[0071] Please see Figures 2 to 6 As shown, a tower section 100 provided in one embodiment of this application includes an inner cylinder 110, an outer cylinder 120, and a filler 130. The inner cylinder 110 has a hollow cavity. The outer cylinder 120 is sleeved on the outside of the inner cylinder 110. The outer cylinder 120 includes a first cylinder body 121 and a plurality of connecting members 122 disposed on the first cylinder body 121. In the radial direction Z of the inner cylinder 110, the first cylinder body 121 and the inner cylinder 110 are spaced apart from each other and form an annular cavity. The filler 130 fills the annular cavity. The filler 130 is fixedly connected to the inner cylinder 110 and the first cylinder body 121 and covers at least a portion of each connecting member 122. Along the radial direction Z of the inner cylinder 110, the first cylinder body 121 includes multiple interconnected winding layers. Each connector 122 includes a fixing part 1221 and a connecting part 1222 that are intersected and connected. The fixing part 1221 is clamped and fixed between two adjacent winding layers along the radial direction Z. The connecting part 1222 protrudes from the first cylinder body 121 and is inserted and fixed inside the filler 130.

[0072] The inner cylinder 110 can be a single integral structure or formed by splicing multiple segments. When multiple segments are included, the segments can be spliced ​​along the axial direction X of the inner cylinder 110 itself, or they can be spliced ​​along the circumferential direction Y of the inner cylinder 110.

[0073] The radial dimension of the outer cylinder 120 is larger than that of the inner cylinder 110. The outer cylinder 120 is fitted outside the inner cylinder 110 and spaced apart from the inner cylinder 110 to form an annular cavity.

[0074] The inner cylinder 110 and the outer cylinder 120 can both be cylindrical or polygonal. Of course, in some embodiments, one of the inner cylinder 110 and the other of the outer cylinder 120 can be cylindrical and the other is polygonal.

[0075] The winding layer of the first cylindrical body 121 may include a fiber layer. The first cylindrical body 121 may be formed by winding multiple fiber layers. After winding to a certain thickness, the adapter part 1222 of the connector 122 can be inserted through the winding layer. The fixing part 1221 of the connector 122 abuts against one of the winding layers. The fiber layer is wound to a predetermined thickness to form the first cylindrical body 121.

[0076] The filler 130 includes a solid structure formed by grouting and curing of concrete or the like. The filler 130 is provided with a transition portion 1222 covering the connector 122 between the inner cylinder 110 and the first cylinder body 121.

[0077] The inner cylinder 110 and the outer cylinder 120 can serve as inner and outer blocking structures during the pouring of the filler 130, and play a role in mold shaping.

[0078] One embodiment of this application provides a tower section 100. Since the first cylinder body 121 includes multiple interconnected winding layers, each connector 122 includes a fixing part 1221 and a connecting part 1222 that intersect and connect with each other. The fixing part 1221 is radially Z-clamped and fixed between two adjacent winding layers. The connecting part 1222 protrudes from the first cylinder body 121 and is inserted and fixed within the filler 130. This allows the outer cylinder 120 to be formed by winding multiple winding layers to form the first cylinder body 121 and ensure the connection and fixation between the first cylinder body 121 and each connector 122. The connecting part 1222 is inserted and fixed within the filler 130, ensuring the connection requirements between the various parts of the tower section 100. Furthermore, it eliminates the need for mold forming, allowing for winding and forming in the pre-assembled area of ​​the wind turbine generator set, eliminating the need for transportation and segmented assembly, and overcoming limitations on transportation height and assembly costs. This structural form of the outer cylinder 120 also reduces the probability of water leakage in the applied tower 10.

[0079] Please see Figures 2 to 7As shown, in some optional embodiments, in one embodiment of this application, a tower section 100 is provided, in which multiple connectors 122 are grouped and arranged to form multiple sets of connection assemblies 122a. Each set of connection assemblies 122a includes at least two connectors 122 distributed in the circumferential Y direction along the inner cylinder 110. The multiple sets of connection assemblies 122a are arranged in the axial X direction along the inner cylinder 110. The connectors 122 of two adjacent sets of connection assemblies 122a are staggered in the circumferential Y direction and partially overlap in the axial X direction.

[0080] The number of connectors 122 included in each group of connection assemblies 122a can be equal. Of course, there can also be a difference in the number of connectors 122 included in at least two groups of connection assemblies 122a.

[0081] The height of multiple sets of connecting assemblies 122a in the axial direction is greater than the height of the first cylindrical body 121 in the axial direction, so that the connecting parts 122 of adjacent sets of connecting assemblies 122a partially overlap in the axial direction.

[0082] The tower section 100 provided in one embodiment of this application, by having the connectors 122 of two adjacent sets of connecting assemblies 122a staggered in the circumferential Y direction and partially overlapping in the axial X direction, can ensure that the outer side of the outer cylinder 120 is subjected to uniform force, effectively avoid the problem of cracks in the outer cylinder 120 due to bending moment, improve the strength and integrity of the outer cylinder 120, and reduce the probability of water leakage and safety risks.

[0083] Optionally, the connectors 122 included in each connection assembly 122a can be spaced apart and evenly distributed in the circumferential Y direction of the inner cylinder 110. This helps to ensure the uniformity of force distribution in the circumferential Y direction.

[0084] Please continue reading. Figures 2 to 6 As shown, in some optional embodiments, in one embodiment of this application, the tower section 100 has a fixing part 1221 extending along the axial direction X of the inner cylinder 110. The fixing part 1221 has a transition part 1222 at both ends of the axial direction X. The transition part 1222 includes a transition section 1222a and a limiting section 1222b distributed along the radial direction Z. The transition section 1222a connects the fixing part 1221 and the limiting section 1222b, and extends along the radial direction Z from the outer cylinder 120 to one side of the inner cylinder 110. The width of the limiting section 1222b decreases.

[0085] The fixing part 1221 and the connecting part 1222 can be plate-shaped or sheet-shaped structures, and the length direction of the fixing part 1221 is the same as the axial direction X of the inner cylinder 110.

[0086] The fixing part 1221 and the adapter part 1222 can be connected by a fixed structure or by an integral structure.

[0087] This allows the end of the limiting segment 1222b that is away from the transition segment 1222a to form a pointed structure. The decreasing trend can be selected as gradual decrease.

[0088] In one embodiment of this application, the tower section 100 is provided, and the connector 122 adopts the above-described structure. This structure ensures the connection between the connector 122 and the first cylinder body 121. At the same time, the structure of the transition part 1222 allows the first cylinder body 121 to be wound with a portion of the winding layer during the molding of the outer cylinder 120. The limiting section 1222b of the connector 122 is positioned facing the outer surface of the winding layer that has already been wound with a predetermined layer. The connector 122 is inserted into the winding layer by external force, such as a pressure mechanism. The limiting section 1222b penetrates the already wound portion of the winding layer and is fixed on the winding layer. This ensures the connection strength between the connector 122 and the first cylinder body 121 and reduces the molding difficulty of the outer cylinder 120.

[0089] In some optional embodiments, in one embodiment of this application, the tower section 100 has a limiting section 1222b protruding from the transition section 1222a on both sides along the circumferential Y direction of the inner cylinder 110. The limiting section 1222b is provided with a barb groove 1222c. The barb groove 1222c starts from the side of the limiting section 1222b facing the outer cylinder 120 and is recessed towards the side where the inner cylinder 110 is located. The transition section 1222a and the limiting section 1222b are both inserted into the filler 130, and the filler 130 is at least partially engaged in the barb groove 1222c.

[0090] Optionally, the limiting segment 1222b and the transition segment 1222a can be shaped like an "arrow".

[0091] Optionally, the barbed groove 1222c can be triangular, or it can be other arc-shaped or polygonal grooves.

[0092] The tower section 100 provided in one embodiment of this application, through the above-mentioned configuration, can increase the contact area between the connector 122 and the filler 130, and at the same time, can also make the limiting section 1222b engage with the filler 130, ensuring the connection strength between the outer cylinder 120 and the filler 130, and improving the reliability of the tower section 100.

[0093] In some alternative embodiments, the tower section 100 provided in one embodiment of this application has a transition portion 1222 that can be bent and deformed under a predetermined pressure and can return to its initial state after the pressure is removed.

[0094] In other words, the adapter 1222 has a certain elastic deformation capability. For example, when subjected to a force along the axial direction X, it can be bent and deformed in the axial direction X, and after the force is removed, it can be restored to its initial state.

[0095] In one embodiment of this application, a tower section 100 is provided. Through the above-described configuration, when the outer cylinder 120 is assembled with the inner cylinder 110, it can be directly sleeved onto the inner cylinder 110 along the axial direction X. Even if other reinforcing members are hung on the inner cylinder 110, during the sleeve assembly process, the transition portion 1222 of the connector 122 can pass over the other reinforcing members hung on the inner cylinder 110 through force deformation, thus ensuring the assembly requirements between the inner cylinder 110 and the outer cylinder 120.

[0096] In some alternative embodiments, the tower section 100 provided in one embodiment of this application includes a transition portion 1222 comprising either a fiber sheet or a metal sheet. The transition portion 1222, in this form, facilitates molding and installation, and ensures the connection requirements between the transition portion 1222 and the filler 130 and the first cylinder body 121.

[0097] In some optional embodiments, one embodiment of this application provides a tower section 100, wherein the first cylinder body 121 includes a first cylinder section 1211 and a second cylinder section 1212 distributed and connected along the axial direction X of the inner cylinder body 110, the radial dimension of the first cylinder section 1211 is larger than the radial dimension of the second cylinder section 1212, and a stepped surface connects the first cylinder section 1211 and the second cylinder section 1212.

[0098] The inner diameter of the first section 1211 can be larger than the outer diameter of the second section 1212.

[0099] The tower section 100 provided in one embodiment of this application, through the above-described configuration, allows the first section 1211 of the tower section 100 located on the upper layer in the axial direction X to be fitted onto the second section 1212 of the lower layer, and the step surface abuts against the second section 1212 for limiting the position, thereby achieving a good waterproof effect, further reducing the probability of rain leakage of the tower 10 formed by the multiple tower sections 100, and enhancing the waterproof performance.

[0100] Please see Figures 2 to 8 As shown, in some optional embodiments, one embodiment of this application provides a tower section 100, which further includes a connecting cage 140, which is sleeved on the inner cylinder 110 and covers the filler 130.

[0101] The connecting cage 140 can be a hollow ring-shaped frame. The connecting cage 140 can be set around the outer periphery of the inner cylinder 110.

[0102] The connecting cage 140 and the inner cylinder 110 can be connected by hanging, or they can be connected by one part extending into the other.

[0103] One embodiment of this application provides a tower section 100, which, by setting a connecting cage 140 and limiting its connection relationship with the inner cylinder 110 and the filling body 130, can ensure the integrity of the tower section 100 and its load resistance capacity, and meet the support requirements of wind power turbine generator sets with continuously increasing capacity and rotor diameter 40.

[0104] Please see Figures 2 to 8 As shown, in some optional embodiments, the tower section 100 provided in one embodiment of this application includes an inner cylinder 110 comprising a second cylinder body 111 and a protrusion 112 disposed on the side of the second cylinder body 111 facing the outer cylinder body 120. The connecting cage 140 includes a plurality of prefabricated parts 141, each prefabricated part 141 being hung on the protrusion 112, and adjacent prefabricated parts 141 being connected.

[0105] The prefabricated component 141 can be a hollow frame unit that extends a predetermined length along both the circumferential Y direction and the axial X direction of the inner cylinder 110, and the structural form of each prefabricated component 141 can be the same.

[0106] The protrusion 112 provided on the second cylinder body 111 can extend in a ring shape along the circumferential direction Y, or extend in an arc shape along the axial direction X.

[0107] The prefabricated components 141 can be connected to each other by welding, bonding or bolting, with welding being the preferred method.

[0108] One embodiment of this application provides a tower section 100, which, by providing a protrusion 112 and prefabricated components 141, facilitates the construction positioning of the connecting cage 140, reduces construction costs, and allows the inner cylinder 110 and the filling body 130 to be interlocked, avoiding delamination. Furthermore, the above-mentioned configuration allows the connecting cage 140 to be assembled from multiple prefabricated components 141, eliminating the need for one-time molding and reducing molding and installation difficulties.

[0109] In some optional embodiments, the preform 141 may include a plurality of annular connecting rods 1411 and a plurality of vertical connecting rods 1412, wherein the annular connecting rods 1411 and the vertical connecting rods 1412 are intersecting and connected to each other. The structure is simple, has high strength, and is easy to mold.

[0110] In some optional embodiments, one embodiment of the present application provides a tower section 100 with multiple protrusions 112. The multiple protrusions 112 are distributed at intervals along the axial direction X of the inner cylinder 110. Each protrusion 112 is annular and arranged around the axis of the inner cylinder 110. Each protrusion 112 is provided with a prefabricated component 141, and each prefabricated component 141 is supported on at least one protrusion 112 in the axial direction X.

[0111] The number of protrusions 112 can be two, three or more.

[0112] Along the axial direction X, the distance between two adjacent protrusions 112 can be equal.

[0113] The tower section 100 provided in one embodiment of this application, through the above-mentioned configuration, facilitates the construction positioning of the connecting cage 140, reduces construction costs, and the protruding part 112 structure can provide support and positioning for the prefabricated part 141 in the axial X direction, ensuring the connection requirements of the two.

[0114] It is understood that the above-described structure and distribution of the protrusion 112 is only one optional implementation. In some embodiments, the protrusion 112 may include multiple protrusions, which are spaced apart along the circumferential Y direction of the inner cylinder 110. Each protrusion 112 is strip-shaped and extends along the axial X direction of the inner cylinder 110. Each protrusion 112 is equipped with a prefabricated component 141, and each prefabricated component 141 is supported by at least one protrusion 112 in the circumferential Y direction of the inner cylinder 110. Through the above arrangement, the construction positioning of the connecting cage 140 is also facilitated, reducing construction costs. The structure of the protrusion 112 can provide support and positioning for the prefabricated component 141 in the axial X direction, ensuring the connection requirements between the two.

[0115] In some optional embodiments, the tower section 100 provided in one embodiment of this application has a winding layer including a fiber layer. This configuration facilitates the outer cylinder 120 being formed by winding, eliminating constraints on the forming location, the need for transportation and segmented assembly, and limitations on transportation height and assembly costs.

[0116] In some optional embodiments, the tower section 100 provided in one embodiment of this application has an inner cylinder 110 comprising one of concrete, fiber, and metal. Furthermore, using concrete or fiber offers advantages such as good corrosion resistance.

[0117] Please continue reading. Figures 2 to 8 And see also Figure 9 , Figure 10 As shown, in another aspect, one embodiment of this application also provides a method for forming a tower section 100, including:

[0118] S100, provides a bottom support 50, the bottom support 50 having a support surface 51.

[0119] Optionally, the bottom support 50 can be disc-shaped, and the support surface 51 can optionally be a flat surface, or optionally have stepped surfaces around it.

[0120] S200, An inner cylinder 110 is provided on the support surface 51, and the inner cylinder 110 has a hollow cavity.

[0121] Optionally, the inner cylinder 110 can adopt the form of the tower section 100 in the above embodiments, which will not be repeated here.

[0122] S300. An outer cylinder 120 is provided outside the inner cylinder 110. The outer cylinder 120 includes a first cylinder body 121 supported on the support surface 51 and a plurality of connectors 122 disposed on the first cylinder body 121. The first cylinder body 121 includes multiple layers of interconnected winding layers. The first cylinder body 121 and the inner cylinder 110 are spaced apart from each other and form an annular cavity. Each connector 122 includes a fixing part 1221 and a transition part 1222 that are intersected and connected. The fixing part 1221 is clamped and fixed between two adjacent winding layers, and the transition part 1222 is located in the hollow cavity.

[0123] Alternatively, the outer cylinder 120 can take the form of the tower section 100 in the above embodiments, which will not be repeated here.

[0124] S400. Inject grout into the hollow cavity and wait for the grout to solidify to form a filler 130 that connects and fixes the inner cylinder 110 and the outer cylinder 120. The filler 130 covers the transition part 1222.

[0125] Optionally, the grout to be injected can be concrete grout. The inner cylinder 110, the outer cylinder 120 and the supporting surface 51 of the bottom support 50 together provide the grout injection space, which forms a filler 130 after curing.

[0126] S500, remove the bottom support 50 to form the tower section 100.

[0127] The tower section 100 forming method provided in one embodiment of this application can be used to form the tower section 100 provided in the above embodiments. Since the first cylinder body 121 includes multiple interconnected winding layers, each connector 122 includes a fixing part 1221 and a connecting part 1222 that are intersected and connected. The fixing part 1221 is clamped and fixed between two adjacent winding layers in the radial direction Z. The connecting part 1222 protrudes from the first cylinder body 121 and is inserted and fixed in the filler 130. This allows the outer cylinder body 120 to form the first cylinder body 121 by winding multiple winding layers and to ensure the connection and fixation between the first cylinder body 121 and each connector 122. It can also be inserted and fixed in the filler 130 by the connecting part 1222. This ensures the connection requirements between the various parts of the tower section 100. At the same time, it does not require mold forming and can be wound and formed in the pre-assembled area of ​​the wind turbine generator set. It does not require transportation or segmented assembly and is not limited by transportation height or assembly cost. Furthermore, this type of outer cylinder 120 structure can also reduce the probability of water leakage in the applied tower 10.

[0128] Please see Figure 11 As shown, in some optional embodiments, the molding method provided in one embodiment of this application further includes, before the step of fitting the outer cylinder 120 onto the inner cylinder 110:

[0129] S601. Provide a support cylinder. The provided support cylinder can be cylindrical or polygonal, depending on the shape of the outer cylinder 120 to be formed. A cylindrical shape is optional.

[0130] S602. Wrap n layers of fiber around the outside of the support cylinder, with adjacent fiber layers connected and fixed to form an initial cylinder blank with n layers of winding, where n ≥ 1.

[0131] Optionally, adjacent fiber layers can be connected and fixed by a structure such as an adhesive. For example, during the winding process, an adhesive can be applied to the previous fiber layer, and after the next fiber layer is wound, it can be bonded to the previous fiber layer through the adhesive. After curing, the two can be connected and fixed.

[0132] S603. Separate the initial cylindrical blank from the support cylinder.

[0133] S604. Provide multiple connectors 122, each connector 122 is inserted into the initial cylindrical blank from the outer periphery of the initial cylindrical blank, such that the fixing part 1221 abuts against the nth winding layer, and the transition part 1222 protrudes from the inner wall surface of the initial cylindrical blank. The connectors 122 can adopt the structural forms described above in the tower section 100, which will not be repeated here.

[0134] S605. Continue winding m fiber layers outside the nth winding layer, connecting and fixing adjacent fiber layers to form an outer cylinder 120, where m ≥ 1. The values ​​of m and n can be equal, or one can be greater than the other, for example, m ≥ n.

[0135] One embodiment of this application provides a molding method that, through the above-described configuration, allows for the molding of the outer cylinder 120 by winding a fiber layer, ensuring the connection requirements between the first cylinder body 121 and each connecting member 122. No mold molding is required; the outer cylinder can be wound and molded in the pre-assembled area of ​​the wind turbine generator set, eliminating the need for transportation and segmented assembly, and avoiding limitations on transportation height and assembly costs. Furthermore, this structural form of the outer cylinder 120 can reduce the probability of water leakage from the applied tower 10.

[0136] In some optional embodiments, the molding method provided in one embodiment of this application further includes, before the step of fitting the outer cylinder 120 onto the inner cylinder 110:

[0137] Multiple prefabricated components 141 are provided. The structural form of the prefabricated component 141 can adopt the description in the tower section 100 of the above embodiments, and will not be repeated here.

[0138] Multiple prefabricated components 141 are hung on the outer periphery of the inner cylinder 110. Optionally, they can be hung on the protrusions 112 of the inner cylinder 110, and the adjacent prefabricated components 141 are connected together. Optionally, two adjacent prefabricated components 141 can be connected by welding to form a connecting cage 140 that fits into the inner cylinder 110.

[0139] The molding method provided in one embodiment of this application, through the above-mentioned settings, ensures that the connecting cage 140 is covered inside the filling body 130 of the molded tower section 100, thereby ensuring the load-bearing capacity of the molded tower section 100 and the integrity of the sleeve section.

[0140] Please see Figure 12 As shown, in some optional embodiments, in one embodiment of the molding method provided by this application, in step S300, the first cylindrical body 121 includes a first cylindrical section 1211 and a second cylindrical section 1212 distributed and connected along the axial direction X of the inner cylindrical body 110. The radial dimension of the first cylindrical section 1211 is greater than the radial dimension of the second cylindrical section 1212. In step S100, the support surface 51 of the provided bottom support 50 includes a first sub-support surface 511 and a second sub-support surface 512. The first sub-support surface 511 protrudes from the second sub-support surface 512 in the axial direction X. That is, the height of the first sub-support surface 511 in the axial direction X is higher than the height of the second sub-support surface 512.

[0141] Before step S400, the method further includes:

[0142] The inner cylinder 110 and the second cylinder section 1212 are both supported on the first sub-support surface 511, and the first cylinder section 1211 is set to protrude from the inner cylinder 110 and supported on the second sub-support surface 512.

[0143] A binding member 60 is provided, which is at least bound to the first cylindrical section 1211 so that the outer cylindrical body 120 is fitted to the outer peripheral surface of the bottom support 50.

[0144] Through the above settings, a tight fit between the outer cylinder 120 and the bottom support 50 can be ensured, reducing the probability of leakage of the injected grout, optimizing the molding process of the tower section 100, and enabling the first cylinder section 1211 of the upper layer of the tower section 100 located in the axial X direction to be sleeved on the second cylinder section 1212 of the lower layer, and to be limited by the step surface abutting against the second cylinder section 1212, which plays a good waterproof role, further reducing the probability of rain leakage of the tower 10 formed by multiple tower sections 100, and enhancing the waterproof performance.

[0145] One embodiment of this application provides a tower section 100 and its forming method, which can avoid the transportation problems of large-diameter mixed towers on land. It alleviates the problems of water leakage and assembly difficulties caused by multi-segment structures in the prior art for mixed towers, and can avoid the problems of excessive wall thickness of the bottom section of the current single-cylinder steel tower 10 and corrosion problems at sea, which is beneficial for its widespread use.

[0146] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tower section, characterized in that, include: The inner cylinder (110) has a hollow cavity; An outer cylinder (120) is sleeved on the outside of the inner cylinder (110). The outer cylinder (120) includes a first cylinder body (121) and a plurality of connecting pieces (122) disposed on the first cylinder body (121). In the radial (Z) direction of the inner cylinder (110), the first cylinder body (121) and the inner cylinder (110) are spaced apart from each other and form an annular cavity. A filler (130) is filled in the annular cavity. The filler (130) is fixedly connected to the inner cylinder (110) and the first cylinder body (121) and covers at least a portion of each of the connecting members (122). Along the radial direction (Z) of the inner cylinder (110), the first cylinder body (121) includes multiple interconnected winding layers. Each connector (122) includes a fixing part (1221) and a connecting part (1222) that are intersected and connected. The fixing part (1221) is clamped and fixed between two adjacent winding layers along the radial direction (Z). The connecting part (1222) protrudes from the first cylinder body (121) and is inserted and fixed inside the filler (130).

2. The tower section according to claim 1, characterized in that, Multiple connectors (122) are grouped and arranged to form multiple sets of connection assemblies (122a). Each set of connection assemblies (122a) includes at least two connectors (122) distributed along the circumferential (Y) direction of the inner cylinder (110). The multiple sets of connection assemblies (122a) are arranged along the axial (X) direction of the inner cylinder (110). The connectors (122) of two adjacent sets of connection assemblies (122a) are staggered in the circumferential (Y) direction and partially overlap in the axial (X) direction.

3. The tower section according to claim 1, characterized in that, The fixing part (1221) extends along the axial direction (X) of the inner cylinder (110). The fixing part (1221) is provided with the connecting part (1222) at both ends of the axial direction (X). The connecting part (1222) includes a connecting section (1222a) and a limiting section (1222b) distributed along the radial direction (Z). The connecting section (1222a) connects the fixing part (1221) and the limiting section (1222b) along the radial direction (Z) and points from the outer cylinder (120) to the inner cylinder (110). The width dimension of the limiting section (1222b) decreases.

4. The tower section according to claim 3, characterized in that, Along the circumferential (Y) direction of the inner cylinder (110), both sides of the limiting section (1222b) protrude from the transition section (1222a). The limiting section (1222b) is provided with a barb groove (1222c). The barb groove (1222c) starts from the side of the limiting section (1222b) facing the outer cylinder (120) and is recessed towards the side where the inner cylinder (110) is located. Both the transition section (1222a) and the limiting section (1222b) are inserted into the filler (130), and the filler (130) is at least partially engaged in the barb groove (1222c).

5. The tower section according to claim 1, characterized in that, The adapter (1222) can be bent and deformed under a predetermined pressure and can return to its initial state after the pressure is removed.

6. The tower section according to claim 1, characterized in that, The first cylindrical body (121) includes a first cylindrical section (1211) and a second cylindrical section (1212) distributed and connected along the axial direction (X) of the inner cylindrical body (110). The radial dimension of the first cylindrical section (1211) is greater than the radial dimension of the second cylindrical section (1212). A stepped surface connects the first cylindrical section (1211) and the second cylindrical section (1212).

7. The tower section according to any one of claims 1 to 6, characterized in that, The tower section (100) also includes a connecting cage (140), which is fitted onto the inner cylinder (110) and encloses the filling body (130).

8. The tower section according to claim 7, characterized in that, The inner cylinder (110) includes a second cylinder body (111) and a protrusion (112) disposed on the side of the second cylinder body (111) facing the outer cylinder (120). The connecting cage (140) includes a plurality of prefabricated parts (141), each of the prefabricated parts (141) is hung on the protrusion (112), and two adjacent prefabricated parts (141) are connected together.

9. The tower section according to claim 8, characterized in that, The protrusions (112) include a plurality of protrusions (112) which are spaced apart along the axial direction (X) of the inner cylinder (110). Each protrusion (112) is annular and arranged around the axis of the inner cylinder (110). Each protrusion (112) is provided with a preform (141), and each preform (141) is supported on at least one protrusion (112) in the axial direction (X). Alternatively, the protrusions (112) may include a plurality of protrusions (112) that are spaced apart along the circumferential (Y) direction of the inner cylinder (110). Each protrusion (112) is strip-shaped and extends along the axial (X) direction of the inner cylinder (110). Each protrusion (112) is provided with a preform (141), and each preform (141) is supported by at least one protrusion (112) along the circumferential (Y) direction of the inner cylinder (110).

10. The tower section according to any one of claims 1 to 6, characterized in that, The winding layer includes a fiber layer, and the inner cylinder (110) includes one of a concrete body, a fiber body, and a metal body.

11. A method for forming a tower section, characterized in that, include: A bottom support (50) is provided, the bottom support (50) having a support surface (51); An inner cylinder (110) is provided on the support surface (51), and the inner cylinder (110) has a hollow cavity; An outer cylinder (120) is provided outside the inner cylinder (110). The outer cylinder (120) includes a first cylinder body (121) supported on the support surface (51) and a plurality of connectors (122) disposed on the first cylinder body (121). The first cylinder body (121) includes multiple layers of interconnected winding layers. The first cylinder body (121) and the inner cylinder (110) are spaced apart from each other and form an annular cavity. Each connector (122) includes a fixing part (1221) and a connecting part (1222) that are intersected and connected. The fixing part (1221) is clamped and fixed between two adjacent winding layers, and the connecting part (1222) is located in the hollow cavity. Slurry is injected into the hollow cavity. After the slurry solidifies, a filler (130) is formed to connect and fix the inner cylinder (110) and the outer cylinder (120). The filler (130) covers the transition part (1222). Remove the bottom support (50) to form the tower section (100).

12. The molding method according to claim 11, characterized in that, Before the step of fitting an outer cylinder (120) over the inner cylinder (110), the method further includes: Provide support cylinder; n layers of fiber are wound around the outside of the support cylinder, and adjacent fiber layers are connected and fixed to form an initial cylinder blank with n winding layers, where n≥1; Separate the initial cylindrical blank from the support cylinder; A plurality of the connectors (122) are provided, and each connector (122) is inserted into the initial cylindrical blank from the outer periphery of the initial cylindrical blank, such that the fixing part (1221) abuts against the nth winding layer, and the connecting part (1222) protrudes from the inner wall surface of the initial cylindrical blank; m fiber layers are wound around the outside of the nth layer, and adjacent fiber layers are connected and fixed to form the outer cylinder (120), where m ≥ 1.

13. The molding method according to claim 11, characterized in that, Prior to the step of fitting an outer cylinder (120) over the inner cylinder (110), the forming method further includes: Multiple prefabricated components (141) are provided; Multiple prefabricated components (141) are hung on the outer periphery of the inner cylinder (110), and the adjacent prefabricated components (141) are connected to form a connecting cage (140) fitted onto the inner cylinder (110).

14. The molding method according to claim 11, characterized in that, The first cylindrical body (121) includes a first cylindrical section (1211) and a second cylindrical section (1212) distributed and connected along the axial direction (X) of the inner cylindrical body (110). The radial dimension of the first cylindrical section (1211) is greater than the radial dimension of the second cylindrical section (1212). The support surface (51) includes a first sub-support surface (511) and a second sub-support surface (512). The first sub-support surface (511) protrudes from the second sub-support surface (512) in the axial direction. Prior to the step of injecting grout into the hollow cavity, the method further includes: The inner cylinder (110) and the second cylinder section (1212) are both supported on the first sub-support surface (511), and the first cylinder section (1211) protrudes from the inner cylinder (110) and is supported on the second sub-support surface (512). A binding member (60) is provided, and the binding member (60) is at least bound to the first cylindrical section (1211) so that the outer cylindrical body (120) is fitted to the outer peripheral surface of the bottom support (50).

15. A tower, characterized in that, include: Multiple tower sections (100) as described in any one of claims 1 to 10, wherein the multiple tower sections (100) are stacked on top of each other and connected to each other.

16. A wind turbine generator set, characterized in that, Includes the tower (10) as described in claim 15.

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