Wind power tower drum section, wind power tower drum and wind power generation equipment

Abstract

The embodiment of the invention relates to the field of wind power generation, and provides a wind power tower drum section, a wind power tower drum and wind power generation equipment. The wind power tower drum section comprises the drum body, the multiple anchoring units are arranged on the surface of the inner wall of the drum body, all the anchoring units are distributed in the annular direction of the drum body, the hole channels used for fixing the pre-stressed anchor cables are formed in the anchoring units, the manufacturing cost is at least reduced, meanwhile, the overpressure state of the high-position wind power tower drum section is relieved, and the service life of the high-position wind power tower drum section is prolonged. And the anti-fatigue performance and the structural safety margin of the wind power tower drum section and the wind power tower drum are improved.

Description

Technical Field

[0001] This application relates to the field of wind power generation, and particularly to a wind turbine tower segment, a wind turbine tower, and a wind power generation device. Background Technology

[0002] The wind turbine tower (referred to as "wind turbine tower") is the core structure of a wind turbine generator, providing structural support. Concrete towers are increasingly widely used due to their lower cost, better load-bearing capacity, and fatigue resistance. A typical structure of this type of tower consists of a lower concrete section and an upper steel tower. The lower concrete section generally uses continuously arranged prestressed steel strands, meaning that prestressed steel strands are arranged along the entire length of the tower from top to bottom and tensioned all at once, making the wind turbine tower a unified load-bearing structure. However, with the industry's trend towards higher hubs and larger blades, traditional concrete wind turbine towers with continuously arranged prestressed tendons are limited by tower vibration frequency, overall stress distribution, and the strength of concrete materials, making it difficult to meet the requirements of tower structural safety, economic adaptability, and ease of construction. This is because the diameter of taller wind turbine towers generally decreases gradually from bottom to top. However, the prestressed steel strands arranged along the entire length provide the same prestress at each height of the wind turbine tower section. This results in the wind turbine tower section with the smaller top dimension being under overpressure. For concrete wind turbine tower sections, this can easily lead to quality and safety issues such as excessive fatigue damage and concrete crushing, thereby affecting the overall structural safety of the wind turbine tower.

[0003] To improve the overall structural safety of wind turbine towers, traditional methods include increasing the wall thickness of the upper and middle sections of the concrete tower or using high-grade concrete for certain tower sections. While these methods ensure that the top sections meet design requirements, they also increase construction costs and expose high-grade concrete to brittle fracture and other quality risks. Currently, attempts have been made to introduce intermediate anchorages or group anchorages to optimize the overall stress distribution of the tower. However, these methods are difficult to implement, have low material utilization, and result in significant cost waste. Furthermore, they can easily interfere with other accessory systems within the tower, affecting its actual performance. Summary of the Invention

[0004] This application provides a wind turbine tower segment, a wind turbine tower, and a wind power generation device, which at least helps to reduce manufacturing costs, improve material utilization, alleviate the overpressure state of the high-level wind turbine tower segment, and improve the fatigue resistance and structural safety margin of the wind turbine tower segment and the wind turbine tower.

[0005] According to some embodiments of this application, a first aspect of this application provides a wind turbine tower segment, including a cylinder, with a plurality of anchoring units disposed on the inner wall surface of the cylinder, all anchoring units being distributed circumferentially along the cylinder, and each anchoring unit being provided with a channel for fixing prestressed anchor cables.

[0006] In some embodiments of this application, all anchoring units are uniformly distributed along the circumference of the cylinder; all anchoring units are located in the same plane, and the plane containing all anchoring units is parallel to the bottom surface of the cylinder.

[0007] In some embodiments of this application, the number of anchoring units is 4 to 8.

[0008] In some embodiments of this application, the anchoring unit includes an anchoring back plate, one surface of which is attached to the inner wall surface of the cylinder; a first anchor plate is provided on the surface of the anchoring back plate away from the cylinder, and a channel penetrates the first anchor plate along the thickness direction of the first anchor plate.

[0009] In some embodiments of this application, a second anchor plate is provided on the surface of the anchor back plate away from the cylinder. The first anchor plate and the second anchor plate are distributed sequentially along the axial direction of the cylinder. The second anchor plate is located below the first anchor plate. A rib plate for reinforcing the anchor unit is provided between the first anchor plate and the second anchor plate.

[0010] In some embodiments of this application, the anchoring unit and the cylinder are integrally formed.

[0011] In some embodiments of this application, a galvanized steel pipe is provided inside the duct to protect the duct, and a pad is provided at the end of the galvanized steel pipe to improve the local pressure resistance at the anchoring position.

[0012] In some embodiments of this application, the wind turbine tower segments are variable diameter segments or straight segments.

[0013] According to some embodiments of this application, a second aspect of this application also provides a wind turbine tower, including: Tower foundation; tower body, the tower body is located above the tower foundation, and at least one of the aforementioned wind turbine tower segments is provided in the tower body; The structure consists of multiple bundles of segmented prestressed anchor cables. One end of each bundle of segmented prestressed anchor cables is connected to the anchoring unit in the tower body, and the other end is connected to the tower foundation.

[0014] In some embodiments of this application, the number of segmented prestressed anchor cables is the same as the number of anchoring units, and there is a one-to-one correspondence between the segmented prestressed anchor cables and the anchoring units.

[0015] In some embodiments of this application, a long prestressed anchor cable is also provided in the tower body. The length of the long prestressed anchor cable is greater than the length of the segmented prestressed anchor cable, and the long prestressed anchor cable is provided along the axial length of the tower body. One end of the long prestressed anchor cable is connected to the top of the tower body, and the other end is connected to the tower foundation.

[0016] In some embodiments of this application, the number of long prestressed anchor cables is the same as the number of segmented prestressed anchor cables.

[0017] According to some embodiments of this application, a third aspect of this application also provides a wind power generation device, including blades and the aforementioned wind turbine tower, with the blades located at the top of the wind turbine tower.

[0018] The technical solution provided in this application has at least the following advantages: In the wind turbine tower segment of this application embodiment, since the anchoring units provided on the inner wall surface of the tower body can fix the prestressed anchor cables through the ducts, the distribution position of the anchoring units can be changed to fix the prestressed anchor cables at any position in the wind turbine tower segment, achieving the effect of segmented anchoring. This has the following advantages: (1) When the anchoring unit fixes the prestressed anchor cable, the cross-sectional pressure of the wind turbine tower segment above the anchoring unit will be greatly reduced, which can improve the fatigue resistance of the wind turbine tower segment. When used in wind turbine towers, it can improve the safety margin of the wind turbine tower structure.

[0019] (2) Because the anchoring unit is small in size and the layout area is flexible, the wind turbine tower segment can also be compatible with other internal accessory systems.

[0020] (3) Since the anchoring units are distributed along the circumferential direction of the cylinder, the uniformity of the stiffness of the wind turbine tower segments can be guaranteed, which can well adapt to the load requirements under different wind directions during wind turbine operation and provide uniform and reliable effective pre-stress.

[0021] (4) It can ensure the strength of the wind turbine tower segment without increasing the wall thickness of the wind turbine tower segment or using high-grade concrete, which significantly reduces the preparation cost and can also avoid the phenomenon that high-grade concrete is prone to brittle failure. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a wind turbine tower segment according to Embodiment 1 of this application; Figure 2 for Figure 1 Top view; Figure 3 This is a schematic diagram of the structure of a wind turbine tower segment after fixing segmented prestressed anchor cables according to Embodiment 1 of this application; Figure 4 This is a schematic diagram of the structure of the wind turbine tower according to Embodiment 1 of this application; Figure 5 This is a schematic diagram of the anchoring unit in Embodiment 2 of this application; Figure 6 This is a schematic diagram of the disassembled anchoring unit of Embodiment 2 of this application; Figure 7 This is a schematic diagram of the structure of a wind turbine tower segment according to Embodiment 2 of this application; Figure 8 This is a schematic diagram of the structure of the wind turbine tower in Embodiment 2 of this application.

[0024] Reference numerals in the attached drawings: 1-cylinder; 2-pad plate; 3-galvanized steel pipe; 4-duct; 5-anchoring unit; 6-segmented prestressed anchor cable; 7-long prestressed anchor cable; 8-connecting section; 9-wind turbine tower segment; 10-first anchor plate; 11-anchoring back plate; 12-bolt; 13-rib plate; 14-second anchor plate; 15-bolt hole. Detailed Implementation

[0025] As the background technology indicates, using unconventional methods such as intermediate anchorages or group anchorages to alleviate overpressure at the top or near the top of wind turbine towers and optimize the overall structural stress distribution presents significant technical challenges and can easily affect other accessory systems. For example, when adding anchorage points in the middle of the cable body, the intermediate anchorage components are arranged along the entire circumference, increasing construction difficulty, posing a risk of interfering with the continuous prestressing tendons, and resulting in redundant structural materials in non-anchorage areas, leading to cost waste and limiting the economic efficiency of the tower. Furthermore, when setting intermediate anchorages or group anchorages (such as separate anchorages for lower / full sections), the anchorages protrude entirely into the tower, occupying internal tower space and potentially interfering with internal accessory systems.

[0026] This application provides a wind turbine tower segment, a wind turbine tower, and a wind power generation device. The wind turbine tower segment in this application is provided with an anchoring unit that can fix the prestressed anchor cable. This can optimize the stress system of the tower structure, reduce the cross-sectional pressure of the wind turbine tower segment above the anchoring unit, alleviate the overpressure state of the wind turbine tower segment, enhance the fatigue resistance of the wind turbine tower segment and the wind turbine tower, improve the structural safety margin of the wind turbine tower segment and the wind turbine tower, and eliminate the need to increase the wall thickness of the pipe section or use high-grade concrete, thereby reducing the manufacturing cost.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0030] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application. For example, if the device or element in the illustration is inverted, then the element described as "below," "under," "down," or "bottom" of other elements or features will be oriented "above" or "top" of other elements or features. Therefore, the term "below" may cover both above and below orientation depending on the context in which the term is used, which will be obvious to those skilled in the art. Materials may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0031] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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 or an electrical connection; 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0032] In the description of embodiments of this application, the terms "about," "approximately," "roughly," or "about" for referring to a specific parameter include numerical values, and those skilled in the art will understand that the deviation from the numerical value is within the acceptable tolerance of the specific parameter. For example, "about" or "about" for a numerical value may include additional numerical values ​​that are in the range of 90.0% to 110.0% of the numerical value, such as in the range of 95.0% to 105.0%, 97.5% to 102.5%, 99.0% to 101.0%, 99.5% to 100.5%, or 99.9% to 100.1%.

[0033] In the accompanying drawings corresponding to the embodiments of this application, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. Furthermore, when describing a component as "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0034] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included. The formation or provision of a second component above or on a first component, or on the surface of a first component, or on one side of a first component, may include embodiments where the first and second components are in direct contact, and may also include embodiments where an additional component may be present between the first and second components, thereby preventing direct contact between the first and second components. For simplicity and clarity, various components may be drawn at different scales. In the drawings, some layers / components may be omitted for simplicity. Unless otherwise specified, the formation or provision of a second component on the surface of a first component refers to direct contact between the first and second components. The term "component" may refer to a layer, film, region, portion, structure, etc.

[0035] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0036] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0037] The wind turbine tower segment 9 in this embodiment includes a cylinder 1. The inner wall surface of the cylinder 1 is provided with a plurality of anchoring units 5. All anchoring units 5 are distributed circumferentially along the cylinder 1. Each anchoring unit 5 is provided with a channel 4 for fixing prestressed anchor cables.

[0038] In this embodiment, by setting anchoring units 5 on the inner wall of the cylinder 1 and fixing the prestressed anchor cables using the channels 4, flexible anchoring of the prestressed anchor cables at any position on the wind turbine tower can be achieved, realizing the effect of segmented anchoring. After the prestressed anchor cables are fixed in the anchoring units 5, the cross-sectional pressure on the wind turbine tower segment 9 located above the anchoring units 5 will be significantly reduced, making the stress distribution of the tower cross-section match the cross-sectional dimensions, effectively improving the problem of uneven stress distribution caused by the traditional prestressed anchor cable arrangement method. This enhances the fatigue resistance of the wind turbine tower segment 9, and when used in wind turbine towers, it can improve the structural safety margin of the wind turbine tower. In addition, in this embodiment, the structural design of the wind turbine tower segment 9 can significantly reduce the amount of prestressed anchor cables and concrete, etc., and has significant economic and technical advantages. Due to the small size and flexible arrangement of the anchoring units 5, the wind turbine tower segment 9 can also be compatible with the layout of other auxiliary systems. Meanwhile, the anchoring units 5 are evenly distributed around the cylinder 1 in the circumferential direction, which helps to ensure the consistency of the tower's stiffness in all directions, enabling it to adapt to the load changes of the wind turbine when it is running under different wind directions, and providing uniform and reliable effective preload stress.

[0039] In this embodiment, "multiple" means no less than two. In this embodiment, the number of anchoring units 5 is not particularly limited, as long as it meets the purpose of this application. A larger number of anchoring units 5 allows for more precise adjustment of stress distribution, but may also affect the layout of other components within the wind turbine tower. As an example, in this embodiment, the number of anchoring units 5 is 4 to 8, and all anchoring units 5 are evenly distributed along the circumference of the tower body 1; for example, the number of anchoring units 5 can be 4, 5, 6, 7, 8, or within any range of two of the above values. Specifically, in this embodiment, the number of anchoring units 5 is 4. Furthermore, to ensure that the circumferential stress on the same wind turbine tower segment 9 is the same, in some embodiments of this application, all anchoring units 5 are typically located in the same plane, and the plane containing all anchoring units 5 is parallel to the bottom surface of the tower body 1. "All anchoring units 5 are located in the same plane" means that the holes 4 in all anchoring units 5 are located in the same plane.

[0040] This application does not have any special requirements for the fabrication method of the wind turbine tower segment 9, as long as it meets the purpose of this application. For example, the wind turbine tower segment 9 can be formed as a whole by demolding or assembled in sections. In addition, in some embodiments of this application, a prestressing deflector (not shown in the figure) is provided on the inner wall surface of the wind turbine tower segment 9. The prestressing deflector can change the direction of the prestressed anchor cable, ensuring that the prestressed anchor cable can be located inside the cylinder 1. This application also does not have any special requirements for the type of prestressed anchor cable, as long as it meets the purpose of this application. As an example, multiple steel strands are generally twisted together as a bundle of prestressed anchor cables, which are also referred to as "prestressed steel strands".

[0041] Furthermore, this application does not have any special requirements regarding the type and structure of the anchoring unit 5, as long as it meets the purpose of this application. For example, the anchoring unit 5 can be integrally formed with the cylinder 1 and made of the same material as the cylinder 1; or it can be assembled from multiple components and made of a different material than the cylinder 1.

[0042] As an example, this application provides two structures for the anchoring unit 5, as follows: Anchoring unit 5 can be integrally formed with cylinder 1, such as Figures 1-4 As shown; specifically, when the anchoring unit 5 and the cylinder 1 are integrally formed, a fixing component (not shown in the figure) for reinforcing the anchoring unit 5 will be provided between the anchoring unit 5 and the cylinder 1. For example, additional reinforcing bars can be provided between the anchoring unit 5 and the cylinder 1 to form an integral reinforcing cage. In addition, in some embodiments of this application, in order to shape the channel 4, a galvanized steel pipe 3 will be provided in the channel 4 to protect the channel 4, and a pad 2 will be provided at the end of the galvanized steel pipe 3 to improve the local pressure resistance at the anchoring position.

[0043] Anchor unit 5 can also be detachable, such as Figures 5-8 As shown; specifically, as Figure 6 As shown, the anchoring unit 5 includes an anchoring back plate 11, one surface of which is attached to the inner wall surface of the cylinder 1. A first anchor plate 10 is provided on the surface of the anchoring back plate 11 away from the cylinder 1, and a channel 4 penetrates the first anchor plate 10 along its thickness direction. The anchoring back plate 11 can fix the anchoring unit 5 to the surface of the cylinder 1. Typically, positioning bolt holes 15 are provided on the anchoring back plate 11, and then high-strength bolts 12 are passed through the positioning bolt holes 15 and embedded into the cylinder 1. In this way, the anchoring back plate 11 can be well fixed and attached to the inner wall surface of the cylinder 1. The first anchor plate 10 can be welded to the anchoring back plate 11, and then the prestressed anchor cable is fixed through the channel 4.

[0044] In some embodiments of this application, to ensure that the anchoring unit 5 has sufficient strength and rigidity to fix the prestressed anchor cable, a second anchor plate 14 is usually provided on the surface of the anchoring back plate 11 away from the cylinder 1. The first anchor plate 10 and the second anchor plate 14 are distributed sequentially along the axial direction of the cylinder 1. The second anchor plate 14 is located below the first anchor plate 10, and the second anchor plate 14 does not obstruct the hole 4 in the first anchor plate 10. A rib plate 13 for reinforcing the anchoring unit 5 is provided between the first anchor plate 10 and the second anchor plate 14. Through the combined action of the second anchor plate 14 and the rib plate 13 between the first anchor plate 10 and the second anchor plate 14, the first anchor plate 10 can be better stabilized, thereby ensuring that the anchoring unit 5 can better fix the prestressed anchor cable. In addition, in this application, the number of rib plates 13 can be set according to the actual situation to better distribute the pressure generated when fixing the prestressed anchor cable and improve the local stability of the plate, and is not limited to two.

[0045] The wind turbine tower segment 9 of this application can be either a variable diameter segment or a straight segment. A variable diameter segment refers to a wind turbine tower with a gradually changing diameter; during tower fabrication, the end with the larger diameter is typically located at the bottom, and the end with the smaller diameter is at the top, and the variable diameter segment is usually located near the bottom of the wind turbine tower. A straight segment refers to a wind turbine tower with a constant diameter; the straight segment is usually located near the top of the wind turbine tower.

[0046] This application also provides a wind turbine tower, including a tower foundation, a tower body, and multiple segmented prestressed anchor cables 6. The tower body is located above the tower foundation and is formed by stacking multiple wind turbine tower segments 9. At least one wind turbine tower segment 9 is the aforementioned wind turbine tower segment 9. One end of each bundle of segmented prestressed anchor cables 6 is connected to the anchoring unit 5 in the tower body, and the other end is connected to the tower foundation.

[0047] It should be noted that the diameter of the wind turbine tower body can remain constant, gradually decrease, or decrease gradually before remaining constant. However, taller wind turbine towers typically decrease in diameter before maintaining a constant diameter. The diameter variation of the tower body can be achieved by stacking wind turbine tower segments 9 of different types or diameters. For example, multiple variable-diameter wind turbine tower segments can be stacked sequentially, followed by straight-section wind turbine tower segments 9, thus forming a tower body with a diameter that first gradually decreases and then remains constant. Furthermore, the materials of the multiple wind turbine tower segments 9 can be the same or different. For example, they can all be made of concrete. Of course, as mentioned earlier, the most common method is currently a steel-concrete hybrid material, with the wind turbine tower segments 9 near the tower foundation made of concrete and the top wind turbine tower segments 9 made of steel. Furthermore, when concrete wind turbine tower segments 9 and steel wind turbine tower segments 9 are used interchangeably, a connecting section 8 is typically provided between the concrete and steel wind turbine tower segments 9 to ensure a stable connection between them. Since concrete wind turbine tower segments 9 are more prone to safety issues under overpressure conditions, unless otherwise specified, the wind turbine tower segments 9 in this application are all made of concrete. Of course, the structure of steel wind turbine tower segments 9 is also applicable to this application, and will not be described further here.

[0048] In some embodiments of this application, a long prestressed anchor cable 7 is also provided in the wind turbine tower. The length of the long prestressed anchor cable 7 is greater than the length of the segmented prestressed anchor cables 6. The long prestressed anchor cable 7 is arranged along the axial length of the tower body, with one end connected to the top of the tower body and the other end connected to the tower foundation. This application does not have any special requirements on the number of long prestressed anchor cables and segmented prestressed anchor cables, as long as the purpose of this application is met. Generally, when determining the long prestressed anchor cable 7, it is usually configured according to the calculation results required to keep the tower body under pressure during normal operation.

[0049] In addition, in some embodiments of this application, in order to distribute the prestress more evenly, one anchoring unit 5 usually fixes one bundle of prestressed anchor cables. At this time, the number of segmented prestressed anchor cables 6 is the same as the number of anchoring units 5, and the segmented prestressed anchor cables 6 correspond one-to-one with the anchoring units 5.

[0050] In order to fix the long prestressed anchor cable 7 and the segmented prestressed anchor cable 6, a prestressed anchor cable tensioning anchor end (not shown in the figure) is usually set on the tower foundation. One end of the long prestressed anchor cable 7 and the segmented prestressed anchor cable 6 will be fixed to the tower foundation through the prestressed anchor cable tensioning anchor end.

[0051] In addition, during the process of stacking wind turbine tower segments 9 to form a wind turbine tower, other components can be added to facilitate stacking or enhance the strength of the wind turbine tower. For example, additional lifting points or temporary hoisting fixtures can be added for hoisting the wind turbine tower, or additional shear-resistant components can be added to fix the wind turbine tower segments 9.

[0052] This application also provides a wind power generation device, which includes blades and the aforementioned wind turbine tower, with the blades located at the top of the wind turbine tower.

[0053] The technical solution of this application will be described in detail below with reference to specific embodiments.

[0054] Example 1 This embodiment provides a wind turbine tower section 9, including a cylinder 1. The inner wall surface of the cylinder 1 is provided with four anchoring units 5. All anchoring units 5 are evenly distributed along the circumference of the cylinder 1. All anchoring units 5 are located in the same plane, and the plane where all anchoring units 5 are located is parallel to the bottom surface of the cylinder 1. The anchoring units 5 and the cylinder 1 are integrally tied steel cages and cast in place. Each anchoring unit 5 is provided with a channel 4 for fixing prestressed anchor cables. Spiral reinforcement (not shown in the figure) is provided around the channel 4. A galvanized steel pipe 3 is provided in the channel 4 to protect the channel 4. The end of the galvanized steel pipe 3 is provided with a pad 2 to improve the local pressure resistance at the anchoring position.

[0055] The specific fabrication process of wind turbine tower segment 9 in this embodiment is as follows: The segments of the wind turbine tower section 9 are cast in the mold to form the anchoring unit 5 and the cylinder 1 as a single unit. During casting, a reinforcing cage is used to bind the anchoring unit 5 and the cylinder 1 as a whole, and spiral reinforcement is pre-embedded around the duct 4. Galvanized steel pipes 3 are pre-embedded in the inner wall of the duct 4 to ensure the shape of the duct 4, and pads 2 are pre-embedded at the ends of the galvanized steel pipes 3 to improve the local pressure resistance at the anchoring position. After casting, the segments are cured and transported according to the standard process for tunnel segments, and after being transported to the wind farm, the segments are spliced ​​on the splicing platform to form the wind turbine tower section 9.

[0056] Example 2 This application provides a wind power generation device, including wind turbine tower blades. The wind turbine tower includes a tower foundation, a tower body, and prestressed anchor cables. The tower body is formed by stacking 41 wind turbine tower segments, and the structure of the 31st wind turbine tower segment from the bottom is the wind turbine tower segment 9 in Embodiment 1. The wind turbine tower is equipped with 24 bundles of prestressed anchor cables (only 8 bundles are shown for the sake of neatness), of which 4 bundles are segmented prestressed anchor cables 6 and 20 bundles are long-segment prestressed anchor cables 7. One end of each bundle of segmented prestressed anchor cables 6 is connected to the tower foundation through a prestressed anchor cable tensioning anchor end (not shown in the figure), and the other end is connected to an anchoring unit 5 through a duct 4. The length of the long prestressed anchor cable 7 is greater than the length of the segmented prestressed anchor cable 6, and the long prestressed anchor cable 7 is installed along the axial length of the tower body; one end of the long prestressed anchor cable 7 is connected to the top of the tower body, and the other end is also connected to the tower foundation through the prestressed anchor cable tensioning anchor end.

[0057] The specific manufacturing process of wind turbine towers is as follows: Epoxy structural adhesive was applied to the horizontal joint surfaces of each wind turbine tower segment. The wind turbine tower segments were then hoisted sequentially onto the tower foundation according to their design numbers. After all wind turbine tower segments were installed, the segmented prestressed anchor cables 6 were hoisted from top to bottom along the duct 4 and the foundation duct (the foundation duct is pre-installed in the wind turbine tower and is not shown in the diagram). Then, the long prestressed anchor cables 7 were hoisted and anchored sequentially from the top down along the reinforced concrete transition section and the foundation duct. After all prestressed anchor cables were installed and threaded, all prestressed anchor cables were tensioned within the tower foundation at the bottom, ensuring the wind turbine tower was under overall stress.

[0058] In this embodiment of the wind turbine tower, the compressive stress caused by the prestressed anchor cables in the sections above anchor unit 5 was reduced by 15% in actual measurements. Under the same load conditions, the cumulative fatigue damage of the wind turbine tower segment 9 above anchor unit 5 was reduced to 0.01% of that of the scheme with prestressed anchor cables installed along the entire length, significantly improving the structural safety margin. In addition, the amount of prestressed anchor cables used was reduced by 4%, and compared with wind turbine towers without anchor units 5, the average cost of a single wind turbine tower segment was reduced by nearly 10,000 yuan. Moreover, compared with structures that introduce intermediate anchor positions or group anchoring, the amount of concrete used in the wind turbine tower in this embodiment was reduced by 75.7%, and the amount of steel reinforcement was reduced by more than 15%.

[0059] Example 3 This embodiment provides a wind turbine tower segment 9, including a cylinder 1. Four anchoring units 5 are disposed on the inner wall surface of the cylinder 1. All anchoring units 5 are evenly distributed along the circumference of the cylinder 1, located in the same plane, and the plane containing all anchoring units 5 is parallel to the bottom surface of the cylinder 1. Each anchoring unit 5 includes an anchoring back plate 11, one surface of which is attached to the inner wall surface of the cylinder 1. A first anchor plate 10 is disposed on the surface of the anchoring back plate 11 away from the cylinder 1, and a channel 4 for fixing prestressed anchor cables is provided on the first anchor plate 10. The channel 4 penetrates the first anchor plate 10 along its thickness direction. A second anchor plate 14 is also disposed on the surface of the anchoring back plate 11 away from the cylinder 1. The first anchor plate 10 and the second anchor plate 14 are sequentially distributed along the axial direction of the cylinder 1, with the second anchor plate 14 located below the first anchor plate 10. A rib plate 13 for reinforcing the anchoring unit 5 is disposed between the first anchor plate 10 and the second anchor plate 14.

[0060] The specific fabrication process of wind turbine tower segment 9 in this embodiment is as follows: The cylinder 1 is prefabricated in segments with embedded bolts. After prefabrication, it is cured and transported according to the standard process for tunnel segments. After being transported to the wind farm, the segments are spliced ​​on the splicing platform to form the cylinder 1. The steel first anchor plate 10, second anchor plate 14, back plate and rib plate 13 are welded according to the structure of the anchoring unit 5 to form the anchoring unit 5. Then, according to the bolts reserved in the cylinder 1, the bolt holes 15 are positioned on the back plate. The steel anchoring unit 5 is anchored to the inner wall surface of the cylinder 1 through the bolts 12 and the bolt holes 15.

[0061] Example 4 This application provides a wind power generation device, including a wind turbine tower and blades at the top of the tower. The wind turbine tower includes a tower foundation, a tower body, and prestressed anchor cables. The tower body is formed by stacking 41 wind turbine tower segments, with the 31st segment from the bottom having the structure of wind turbine tower segment 9 in embodiment 3. The wind turbine tower contains 24 bundles of prestressed anchor cables, including 4 bundles of segmented prestressed anchor cables 6 and 20 bundles of long-segment prestressed anchor cables 7. One end of each bundle of segmented prestressed anchor cables 6 is connected to the tower foundation via a prestressed anchor cable-bolt 12 converter (not shown in the figure), and the other end is connected to the anchoring unit 5 via a channel 4. The length of the long prestressed anchor cable 7 is greater than the length of the segmented prestressed anchor cable 6, and the long prestressed anchor cable 7 is installed along the axial length of the tower body; one end of the long prestressed anchor cable 7 is connected to the top of the tower body, and the other end is also connected to the tower foundation through the prestressed anchor cable-bolt 12 converter.

[0062] The specific manufacturing process of wind turbine towers is as follows: Epoxy structural adhesive was applied to the horizontal joint surfaces of each wind turbine tower segment. The wind turbine tower segments were then hoisted sequentially onto the tower foundation according to their design numbers. After all wind turbine tower segments were installed, the segmented prestressed anchor cables 6 were hoisted from top to bottom along the duct 4 and the foundation duct (the foundation duct is pre-installed in the wind turbine tower and is not shown in the diagram). Then, the long prestressed anchor cables 7 were hoisted and anchored sequentially from the top down along the reinforced concrete transition section and the foundation duct. After all prestressed anchor cables were installed and threaded, all prestressed anchor cables were tensioned within the tower foundation at the bottom, ensuring the wind turbine tower was under overall stress.

[0063] In the wind turbine tower of this embodiment, the compressive stress caused by the prestressed anchor cable in the part above the anchoring unit 5 was reduced by 15% in actual measurement. Under the same load conditions, the cumulative fatigue damage of the wind turbine tower segment 9 above the anchoring unit 5 was reduced to 0.01% of that of the whole-length prestressed anchor cable scheme, which significantly improved the stress distribution level of the top wind turbine tower segment 9 and greatly improved the structural safety margin.

[0064] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A wind turbine tower segment, characterized by, The application relates to a wind power tower cylinder segment. All the anchor units are uniformly distributed along the ring direction of the cylinder body; all the anchor units are located in the same plane, and the plane where all the anchor units are located is parallel to the bottom surface of the cylinder body.

2. The wind turbine tower section of claim 1, wherein, The number of the anchor units is 4-8.

3. The wind turbine tower section according to claim 1 or 2, characterized in that The anchor unit comprises an anchor back plate, one surface of the anchor back plate is attached to the inner wall surface of the cylinder body; the surface of the anchor back plate away from the cylinder body is provided with a first anchor plate, and the hole passes through the first anchor plate along the thickness direction of the first anchor plate.

4. The wind turbine tower section of claim 1, wherein, The surface of the anchor back plate away from the cylinder body is also provided with a second anchor plate, the first anchor plate and the second anchor plate are sequentially distributed along the axial direction of the cylinder body, the second anchor plate is located below the first anchor plate, and a rib plate for reinforcing the anchor unit is arranged between the first anchor plate and the second anchor plate.

5. The wind turbine tower section of claim 4, wherein, The anchor unit and the cylinder body are integrally formed.

6. The wind turbine tower section of claim 1, wherein, A galvanized steel pipe for protecting the hole is arranged in the hole, and an end of the galvanized steel pipe is provided with a backing plate for improving the local compression capacity of the anchoring position.

7. The wind turbine tower section of claim 6, wherein, The wind power tower cylinder segment is a variable-diameter segment or a straight cylinder segment.

8. The wind turbine tower section of claim 1, wherein, The application relates to a wind power tower cylinder segment.

9. A wind turbine tower, characterized in that The application relates to a wind power tower cylinder segment. A plurality of segmented prestressed anchor cables are arranged, one end of each of the segmented prestressed anchor cables is connected with the anchor unit in the tower body, and the other end is connected with the tower foundation. The number of the segmented prestressed anchor cables is the same as that of the anchor units, and the segmented prestressed anchor cables correspond to the anchor units one by one. A long prestressed anchor cable is further arranged in the tower body, the length of the long prestressed anchor cable is greater than that of the segmented prestressed anchor cable, and the long prestressed anchor cable is arranged along the axial direction of the tower body; one end of the long prestressed anchor cable is connected with the top end of the tower body, and the other end is connected with the tower foundation.

10. The wind turbine tower of claim 9, wherein, The application relates to a wind power tower cylinder segment.

11. The wind turbine tower of claim 9, wherein, The application relates to a wind power tower cylinder segment.

12. A wind power plant, characterized in that ​

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