A ring-shaped prefabricated assembly type concrete wind power tower and an assembly method thereof

Abstract

The application discloses a circular prefabricated assembly type concrete wind power tower and an assembly method. The circular prefabricated assembly type concrete wind power tower comprises a top part, a middle part and a bottom part arranged in sequence in a vertical direction. The top part comprises a first annular body and a first arc-shaped part. The first arc-shaped part is located at the bottom of the first annular body. The middle part comprises two second arc-shaped parts which are connected in a vertical direction and at least partially overlap in a horizontal direction and have opposite opening directions. The bottom part comprises a second annular body and a third arc-shaped part. The third arc-shaped part is located at the top of the second annular body. The first arc-shaped part and the second arc-shaped part are spliced to form an annular shape. The second arc-shaped part and the third arc-shaped part are spliced to form an annular shape. The diameters of the annular shape, the first annular body and the second annular body are the same and concentric. The circular prefabricated assembly type concrete wind power tower has the advantages of high construction efficiency and strong anti-deformation capacity.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower technology, and in particular to a deformation-resistant, structurally stable, annular prefabricated concrete wind turbine tower and its assembly method. Background Technology

[0002] With the rapid development of the new energy industry, the height requirements for wind turbine towers are constantly increasing, which poses greater challenges to the structural design, construction efficiency, and load-bearing capacity of the towers. Currently, wind turbine towers mainly adopt cast-in-place concrete or traditional prefabricated concrete structures; however, many technical problems still need to be solved in practical applications.

[0003] Traditional cast-in-place concrete wind turbine towers have long construction cycles, require extensive work at heights, involve high labor intensity, and pose extremely high safety risks such as falls and collapses. Prefabricated concrete towers, on the other hand, have poor positioning accuracy due to simple assembly, making them prone to eccentricity and misalignment. This leads to concentrated stress at the joint surfaces, making them susceptible to loosening, slippage, and even cracking under the combined forces of compression, bending, shear, and torsion caused by wind loads. Consequently, the overall structural stability and resistance to deformation are insufficient. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems: Existing wind turbine towers have long construction cycles and poor resistance to complex stresses.

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose an annular prefabricated assembled concrete wind turbine tower, comprising a top component, a middle component, and a bottom component arranged sequentially in the vertical direction. The top component includes a first annular body and a first arc-shaped component, the first arc-shaped component being located at the bottom of the first annular body. The middle component includes two second arc-shaped components connected in the vertical direction and at least partially overlapping in the horizontal direction, with their opening directions facing each other. The bottom component includes a second annular body and a third arc-shaped component, the third arc-shaped component being located at the top of the second annular body. The first arc-shaped component and the second arc-shaped component are joined together to form an annular structure, and the second arc-shaped component and the third arc-shaped component are joined together to form an annular structure. The annular structure, the first annular body, and the second annular body have the same diameter and are concentric.

[0007] The present invention has the advantages and technical effects of high construction efficiency and strong resistance to deformation. This solution solves the problems of poor positioning accuracy and easy displacement in traditional prefabricated tower assembly by modularly disassembling the top, middle, and bottom components, combined with a dual positioning structure of the first convex key and the first concave key, and the second convex key and the second concave key. Through the repetitive stacking design of the middle components, flexible adaptation to towers of different heights is achieved, improving component versatility and reducing production and construction costs. Through the synergistic effect of protruding tooth meshing, double bolt locking, and vertical prestressing, a continuous and stable force transmission system is constructed, solving the problems of force concentration at the splicing points and insufficient overall stability, thus improving the durability of the tower.

[0008] In some embodiments, a first convex key and a first concave key are respectively provided on the side of the first arc-shaped member and the second arc-shaped member that are in contact with each other in the horizontal direction, and on the side of the second arc-shaped member and the third arc-shaped member that are in contact with each other in the horizontal direction. The first convex key is arranged on the side of the second arc-shaped member and cooperates with the first concave key on the side of the first arc-shaped member and the third arc-shaped member.

[0009] In some embodiments, the device further includes a second convex key and a second concave key. The second convex key is disposed on the top surface of the second arcuate member and the third arcuate member, and the second concave key is disposed on the bottom surface of the first arcuate member and the second arcuate member. The second convex key and the second concave key cooperate with each other.

[0010] In some embodiments, the system further includes protruding teeth, which are respectively arranged on the sides of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member, and the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member can mesh with each other through the protruding teeth.

[0011] In some embodiments, the device further includes first bolt channels. A plurality of first bolt channels are arranged on the top surfaces of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member. The first bolt channels extend in a vertical direction, and the first bolt channels of the top member, the middle member, and the bottom member correspond one-to-one and are connected in the vertical direction.

[0012] In some embodiments, a second bolt hole is further included, which corresponds one-to-one with the protruding teeth. The extension direction of the second bolt hole is perpendicular to the first bolt hole, and the second bolt hole is used to mate with a high-strength arc bolt.

[0013] In some embodiments, the system further includes prestressed steel bar ducts, which are distributed at intervals with the first convex key on the top surfaces of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member. The prestressed steel bar ducts of the top member, the middle member, and the bottom member correspond one-to-one in the vertical direction and are connected.

[0014] In some embodiments, the arc of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member is 1 / 2 to 2 / 3 of a circle.

[0015] An embodiment of the present invention provides a method for assembling a ring-shaped prefabricated concrete wind turbine tower, comprising the following steps: The bottom component is installed and positioned, and the second annular body of the bottom component is fixed to the wind power foundation to ensure that the axis of the second annular body is vertical. The third arc-shaped component is arranged in the preset assembly position of the second annular body. The middle component is installed by assembling the second arc-shaped part of the middle component and the third arc-shaped part of the bottom component to form a ring. The first convex key on the side of the second arc-shaped part and the first concave key on the side of the third arc-shaped part are engaged and positioned. At the same time, the second concave key on the bottom surface of the second arc-shaped part and the second convex key on the top surface of the third arc-shaped part are engaged, and the protruding teeth of the two are meshed with each other. The second bolt holes are aligned, and the high-strength arc bolts are inserted into the second bolt holes and tightened to achieve circumferential fixation of the bottom component and the middle component. The top component is installed by hoisting it above the middle component, so that the first arc-shaped part at the bottom of the top component and the second arc-shaped part at the top of the middle component are joined to form a ring. The first concave key on the side of the first arc-shaped part and the first convex key on the side of the second arc-shaped part are engaged and positioned. At the same time, the second concave key on the bottom surface of the first arc-shaped part and the second convex key on the top surface of the second arc-shaped part are engaged, and the protruding teeth of the two are meshed with each other. The second bolt holes are aligned, and the high-strength arc bolts are inserted into the second bolt holes and tightened to achieve circumferential fixation of the top component and the middle component. The first annular body of the top component, the ring formed by the middle component and the upper and lower arc-shaped parts, and the second annular body of the bottom component have the same diameter and are concentric. Prestress is applied by inserting prestressed steel bars into the prestressed ducts that run vertically through the wind turbine tower. The prestressed steel bars are tensioned to the design tension and then fixed by anchors. Then, non-shrink high-strength grout is injected into the prestressed ducts under pressure. After the grout solidifies and hardens, vertical prestressing is formed. The annular joints formed by the assembly of each arc-shaped component and the installation points of the prestressed anchors are sealed to complete the assembly of the entire annular prefabricated concrete wind turbine tower.

[0016] In some embodiments, the assembly of intermediate components is repeated according to the tower height, and the next intermediate component is assembled on top of one intermediate component. The second arc-shaped parts of the two intermediate components are engaged by convex and concave keys, their protruding teeth mesh with each other, and the second bolt holes are aligned. High-strength arc bolts are inserted into the second bolt holes and tightened.

[0017] This solution offers the following advantages: The horizontal fit between the first convex key and the first concave key ensures precise horizontal positioning of the arc-shaped components, preventing horizontal slippage. It also increases the contact area, dispersing circumferential forces and enhancing the shear resistance of the mating surface. The vertical alignment of the second convex key and the second concave key ensures accurate vertical assembly of adjacent components, smoothly transmitting vertical loads, resisting vertical shear forces, and strengthening the overall vertical structure of the tower. The interlocking of the protruding teeth enhances the tightness of the circumferential connection between the arc-shaped components, forming a multi-contact force transmission path, effectively resisting torsional moments, preventing loosening of the mating surface, and improving structural stability. The vertically continuous and one-to-one correspondence of the first bolt holes provides a channel for high-strength bolts, achieving rigid locking of the top, middle, and bottom components. The uniform distribution of vertical locking force improves vertical load-bearing and pull-out resistance. The one-to-one correspondence between the second bolt holes and the protruding teeth, perpendicular to the first bolt holes, provides three-dimensional locking. The stable meshing of the protruding teeth enhances the circumferential shear and torsional resistance of the mating surface and simplifies the assembly process. The prestressed steel reinforcement ducts are spaced apart from the first convex key and vertically connected. Uniform circumferential prestress is applied to eliminate assembly gaps, offset the tensile stress of the working load, and improve the overall deformation resistance and crack resistance of the tower. The first, second, and third arc-shaped components adopt a 1 / 2-2 / 3 circumferential arc, which takes into account both the structural rigidity of individual components and the convenience of hoisting, reduces the number of splicing joints, and reduces the risk of stress concentration. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the middle component of the annular prefabricated concrete wind turbine tower according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the top component of the annular prefabricated concrete wind turbine tower according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the bottom component of the annular prefabricated concrete wind turbine tower according to an embodiment of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of a ring-shaped prefabricated concrete wind turbine tower according to an embodiment of the present invention.

[0022] Reference numerals: 1. Top component; 101. First arc-shaped component; 102. First annular body; 2. Middle component; 201. Second arc-shaped component; 3. Bottom component; 301. Third arc-shaped component; 302. Second annular body; 4. First convex key; 5. Second convex key; 6. Protruding tooth; 7. First bolt hole; 8. Second bolt hole; 9. Prestressed steel bar hole. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] An embodiment of the present invention provides a ring-shaped prefabricated concrete wind turbine tower, comprising a top component 1, a middle component 2, and a bottom component 3 arranged sequentially in the vertical direction. The top component 1 includes a first annular body 102 and a first arc-shaped component 101, with the first arc-shaped component 101 located at the bottom of the first annular body 102. The middle component 2 includes two second arc-shaped components 201 that are connected in the vertical direction and at least partially overlap in the horizontal direction, with their opening directions facing each other. The bottom component 3 includes a second annular body 302 and a third arc-shaped component 301, with the third arc-shaped component 301 located at the top of the second annular body 302. The first arc-shaped component 101 and the second arc-shaped component 201 are joined together to form an annular shape, and the second arc-shaped component 201 and the third arc-shaped component 301 are joined together to form an annular shape. The diameters of the annular shape, the first annular body 102, and the second annular body 302 are the same and concentric.

[0025] The modular design, consisting of top component 1, middle component 2, and bottom component 3, enables standardized prefabrication, effectively controlling component quality and reducing on-site construction pollution. Furthermore, the disassembled components have smaller volumes and lighter weights, making them more adaptable to transportation needs and overcoming the geographical limitations of transporting monolithic towers. The integrated fabrication of the first arc-shaped component 101 and the first annular body 102 in top component 1, and the integrated fabrication of the third arc-shaped component 301 and the second annular body 302 in bottom component 3, ensures the structural integrity and load-bearing stability of the upper and lower ends of the tower. The middle component 2 employs a structure of two vertically connected, horizontally overlapping second arc-shaped members 201 with opposite opening directions. This overlapping area enhances the bending and torsional stiffness of the middle component 2. The first arc-shaped member 101 and the second arc-shaped member 201, and the second arc-shaped member 201 and the third arc-shaped member 301, are respectively assembled to form rings. Each assembled ring maintains the same diameter and is concentric with the first ring body 102 and the second ring body 302, ensuring uniform stress distribution across the tower and preventing localized stress concentration due to eccentricity. The concentric, equal-diameter structural design allows wind loads, nacelle weight, and other external forces to be evenly transmitted to the foundation along the tower axis, improving the tower's wind resistance and overturning resistance. Compared to cast-in-place construction, this prefabricated assembly method shortens the on-site construction period, reduces the risks of high-altitude operations, and improves construction efficiency and safety.

[0026] In some embodiments, a first convex key 4 and a first concave key are respectively provided on the side surfaces of the first arc-shaped member 101 and the second arc-shaped member 201 that are in contact with each other in the horizontal direction, and on the side surfaces of the second arc-shaped member 201 and the third arc-shaped member 301 that are in contact with each other in the horizontal direction. The first convex key 4 is arranged on the side surface of the second arc-shaped member 201 and cooperates with the first concave key on the side surface of the first arc-shaped member 101 and the third arc-shaped member 301.

[0027] Specifically, the mating of the first convex key 4 and the first concave key on their horizontally mating sides enables precise horizontal positioning during the assembly of each arc-shaped component. The mechanical limiting of the convex-concave structure prevents relative horizontal slippage or misalignment between the first arc-shaped component 101 and the second arc-shaped component 201, and between the second arc-shaped component 201 and the third arc-shaped component 301 during assembly. This significantly reduces the positioning difficulty during on-site assembly and improves assembly accuracy and efficiency. The convex-concave mating structure increases the contact area of ​​the horizontal mating surfaces of adjacent arc-shaped components, allowing circumferential forces to be transmitted more evenly through the mating surfaces of the convex and concave keys. This reduces the risk of localized force concentration at the mating surfaces. Especially under the circumferential shear force caused by wind loads, the interlocking of the convex and concave keys can directly bear part of the shear force, enhancing the shear resistance of the mating surfaces and improving the overall integrity and stability of the tower's annular structure.

[0028] In some embodiments, the system further includes a second convex key 5 and a second concave key. The second convex key 5 is disposed on the top surface of the second arcuate member 201 and the third arcuate member 301, and the second concave key is disposed on the bottom surface of the first arcuate member 101 and the second arcuate member 201. The second convex key 5 and the second concave key cooperate with each other.

[0029] Specifically, the corresponding upper and lower parts of the second convex key 5 and the second concave key form a vertical positioning and force transmission connection between adjacent components, providing guidance for the vertical assembly of the top component 1 and the middle component 2, and the middle component 2 and the bottom component 3. This avoids vertical offset or eccentricity of the upper and lower components during assembly, ensuring the concentricity of the entire tower. Simultaneously, the upper and lower distributed concave and convex structures can directly bear part of the vertical load, allowing the vertical forces such as the nacelle weight and the tower's self-weight to be smoothly transmitted through the mating surfaces of the second convex key 5 and the second concave key. This reduces the pressure of relying solely on bolts or prestressed structures for vertical force transmission. Furthermore, the mechanical interlocking formed by the concave and convex fit can resist vertical shear forces, preventing relative slippage between adjacent components under wind load fluctuations or vibrations. This strengthens the integrity and stability of the tower's vertical structure and improves the load-bearing reliability of the assembled structure.

[0030] In some embodiments, the system further includes protruding teeth 6, which are respectively arranged on the sides of the first arc-shaped member 101, the second arc-shaped member 201, and the third arc-shaped member 301. The first arc-shaped member 101, the second arc-shaped member 201, and the third arc-shaped member 301 can mesh with each other through the protruding teeth 6.

[0031] Specifically, the protruding teeth 6 are rectangular bodies. The distance between adjacent rectangular bodies is equal to the width of the rectangular body. A groove is formed between adjacent rectangular bodies, with the groove depth equal to the length of the rectangular body. When multiple rectangular bodies are arranged vertically on the side of the curved component, a serrated structure is formed. Multiple rectangular bodies of the same shape are arranged on another curved component. The two curved components are connected by the meshing of the rectangular bodies with the grooves on the other curved component. The mutual meshing of the protruding teeth 6 on the sides of each curved component strengthens the circumferential connection between adjacent curved components. The meshing of the toothed structure forms a multi-contact force transmission path, allowing the circumferential force to be distributed and transmitted among multiple tooth surfaces, avoiding concentrated load on a single contact surface and improving the torsional resistance of the joint surface. Especially under the torsional moment caused by wind loads, the meshing protruding teeth 6 can directly block the relative rotation of adjacent curved components along the circumferential direction, effectively resisting the damage of torque to the joint structure. The toothed meshing structure plays an auxiliary guiding role in the assembly process, making the fit of adjacent arc-shaped parts smoother, improving assembly accuracy, and ensuring good structural stability after meshing. It reduces the risk of loosening of the splicing surface caused by wind load fluctuations or equipment vibration, and ensures the long-term structural reliability of the tower.

[0032] In some embodiments, the device further includes first bolt channels 7. Multiple first bolt channels 7 are arranged on the top surfaces of the first arc-shaped member 101, the second arc-shaped member 201, and the third arc-shaped member 301, respectively. The first bolt channels extend in the vertical direction, and the first bolt channels of the top member 1, the middle member 2, and the bottom member 3 correspond one-to-one and are connected in the vertical direction.

[0033] Specifically, the first bolt channel 7 extends vertically and connects one-to-one with the top component 1, middle component 2, and bottom component 3. The first bolt channel 7 provides a channel for the vertical insertion of high-strength bolts, allowing the bolts to penetrate adjacent components and form a rigid lock, connecting the originally independent top, middle, and bottom components 3 into a whole. Multiple channels are distributed on the top surface of each arc-shaped component, ensuring a uniform distribution of vertical locking force along the circumferential direction of the tower, preventing overload on a single locking point. Combined with the convex key and protruding tooth structure 6, a dual vertical fixing system is formed, improving the tower's vertical load-bearing capacity and pull-out resistance. The channels are formed simultaneously during the prefabrication stage, eliminating the need for on-site drilling, ensuring channel positioning accuracy, avoiding damage to the arc-shaped component structure from on-site drilling, simplifying construction procedures, and improving on-site assembly efficiency.

[0034] In some embodiments, a second bolt hole 8 is further included, which corresponds one-to-one with the protruding tooth 6. The extension direction of the second bolt hole 8 is perpendicular to the first bolt hole 7. The second bolt hole is used to mate with a high-strength arc bolt.

[0035] Specifically, the second bolt channel 8 is an arc-shaped bolt channel. The second bolt channel 8 corresponds one-to-one with the protruding teeth 6 and extends perpendicularly to the first bolt channel 7. It features a double locking mechanism combining circumferential and vertical alignment. Its radial extension along the tower allows the high-strength arc-shaped bolts to directly lock the interlocking protruding teeth 6 after insertion, transforming the mechanical positioning of the tooth surface engagement into rigid fixation. This prevents the meshing teeth from separating or loosening under complex loads, improving the reliability of the circumferential connection. The radially distributed bolt locking force acts on the mating surfaces of adjacent arc-shaped components. The preload increases the normal pressure and friction between the tooth surfaces, enhancing the mating surfaces' resistance to circumferential shear and torsional stiffness. Combined with the vertically extending first bolt channel 7, this forms a three-dimensional locking mechanism, resisting multi-directional forces from wind loads and vibrations. The one-to-one correspondence between the channel and the protruding teeth 6 allows for channel alignment during assembly through the positioning of the protruding teeth 6, simplifying the bolt installation process. The pre-formed channels ensure uniform bolt stress. High-strength bolts and high-strength curved bolts can be selected from friction-type high-strength bolts, with a prestress grade of 10.9 or 12.9. Bolt specifications can be determined by the design.

[0036] In some embodiments, the system further includes prestressed steel bar ducts, which are distributed at intervals with the first convex key 4 on the top surfaces of the first arc-shaped member 101, the second arc-shaped member 201, and the third arc-shaped member 301. The prestressed steel bar ducts of the top member 1, the middle member 2, and the bottom member 3 are vertically aligned and connected.

[0037] Specifically, the design of the prestressed steel bar ducts and the first protruding key 4, which are spaced apart and vertically connected, provides a precise path for the insertion and tensioning of the prestressed steel bars. By applying prestress through post-tensioning, a uniform circumferential prestress can be formed throughout the tower, ensuring a tight fit between the mating surfaces of the curved components and the mating surfaces of the protruding keys, eliminating assembly gaps, and integrating the dispersed top, middle, and bottom components 3 into a unified structural structure, thus improving the overall integrity and deformation resistance of the tower. The uniformly distributed prestress can offset the tensile stress generated by working loads such as wind loads and vibrations, preventing cracking of the concrete due to insufficient tensile strength, and improving the crack resistance and durability of the tower. The spaced arrangement of the prestressed steel bar ducts and the first protruding key 4 ensures that the prestress is uniformly transmitted circumferentially along the tower, avoiding local stress concentration. Furthermore, the ducts are formed during the prefabrication stage, ensuring positioning accuracy and avoiding damage to the component structure during on-site processing, further guaranteeing the stability of the prestressing effect. The prestressed steel bar ducts can be formed into a group of 3 or other numbers of ducts. Each group of prestressed steel bar ducts is distributed with a group of first protruding keys 4 at intervals, which reduces the difficulty of processing and assembly.

[0038] In some embodiments, the arc of the first arc member 101, the second arc member 201, and the third arc member 301 is 1 / 2 to 2 / 3 of a circle.

[0039] Specifically, the first arc-shaped component 101, the second arc-shaped component 201, and the third arc-shaped component 301 adopt an arc design of 1 / 2 to 2 / 3 of the circumference. This ensures the structural integrity and rigidity of each individual arc-shaped component, preventing deformation during transportation or hoisting due to excessive thinness or length of the components. By assembling 2-3 arc-shaped components to form a complete ring, the number of joints is reduced, lowering the risk of stress concentration at the joints. This arc range keeps the volume and weight of the arc-shaped components within a reasonable range, adapting to the load-bearing capacity of conventional hoisting equipment, reducing the difficulty of high-altitude assembly, and ensuring sufficient contact area when adjacent arc-shaped components are assembled. This improves the sealing and load-bearing reliability of the assembled structure, balancing ease of construction and structural stability.

[0040] An embodiment of the present invention provides an assembly method for a ring-shaped prefabricated concrete wind turbine tower, comprising the following steps: The bottom component 3 is installed and positioned, and the second annular body 302 of the bottom component 3 is fixed to the wind power foundation to ensure that the axis of the second annular body 302 is vertical. The third arc-shaped component 301 is arranged in the preset assembly position of the second annular body 302. The installation surface of the wind power foundation is first leveled, and then the second annular body 302 of the bottom component is fixed to the wind power foundation.

[0041] The middle component 2 is installed by assembling the second arc-shaped part 201 of the middle component 2 with the third arc-shaped part 301 of the bottom component 3 to form a ring. The first convex key 4 on the side of the second arc-shaped part 201 and the first concave key on the side of the third arc-shaped part 301 are engaged and positioned. At the same time, the second concave key on the bottom surface of the second arc-shaped part 201 is engaged with the second convex key 5 on the top surface of the third arc-shaped part 301, and the protruding teeth 6 of the two are meshed with each other. The second bolt holes 8 are aligned, and the high-strength arc bolts are inserted into the second bolt holes and tightened to achieve circumferential fixation of the bottom component 3 and the middle component 2. The top component 1 is installed by hoisting it above the middle component 2, so that the first arc-shaped part 101 at the bottom of the top component 1 and the second arc-shaped part 201 at the top of the middle component 2 are joined to form a ring. The first concave key on the side of the first arc-shaped part 101 and the first convex key 4 on the side of the second arc-shaped part 201 are engaged and positioned. At the same time, the second concave key on the bottom surface of the first arc-shaped part 101 and the second convex key 5 on the top surface of the second arc-shaped part 201 are engaged, and the protruding teeth 6 of the two are meshed with each other. The second bolt holes 8 are aligned, and the high-strength arc bolts are inserted into the second bolt holes to achieve circumferential fixation of the top component 1 and the middle component 2. The first annular body 102 of the top component 1, the ring formed by the middle component 2 and the upper and lower arc-shaped parts, and the second annular body 302 of the bottom component 3 have the same diameter and are concentric. Prestress is applied by inserting prestressed steel bars into the prestressed ducts that run vertically through the wind turbine tower. The prestressed steel bars are tensioned to the design tension and then fixed by anchors. Then, non-shrink high-strength grout is injected into the prestressed ducts under pressure. After the grout solidifies and hardens, vertical prestressing is formed. The annular joints formed by the assembly of each arc-shaped component and the installation points of the prestressed anchors are sealed to complete the assembly of the entire annular precast concrete wind turbine tower. The height of the concrete wind turbine tower is 3-n meters, with the specific height determined according to the tower design. The height of the convex key is greater than 40cm, and the reinforcing steel is tensioned using the post-tensioning method.

[0042] In some embodiments, the assembly of intermediate components 2 is repeated according to the tower height, and the next intermediate component 2 is assembled on top of one intermediate component 2. The second arc-shaped parts 201 of the two intermediate components 2 are engaged by convex and concave keys, their protruding teeth 6 mesh with each other, and the second bolt holes are aligned. High-strength arc bolts are inserted into the second bolt holes.

[0043] Specifically, the reusable and stackable assembly method flexibly adapts to the needs of wind turbine towers of different heights, eliminating the need for separate component design for different heights. The second arc-shaped component 201 of the upper and lower middle components 2, through the dual positioning of convex and concave key interlocking and protruding tooth 6 engagement, ensures the accuracy of the stacking assembly. Combined with the locking and fixing of high-strength arc bolts, adjacent middle components 2 can form a rigid connection, ensuring a continuous and smooth vertical force transmission path for the entire tower. This effectively disperses the concentrated stress caused by high-altitude wind loads and the self-weight of the tower, improving the overall structural stability of the ultra-high tower. The modular reusable assembly mode enables parallel construction. Multiple middle components 2 can be prefabricated simultaneously in the factory and then stacked and installed sequentially on site. Compared with monolithic tower construction, this shortens the on-site construction cycle of ultra-high towers and reduces the safety risks of long-term high-altitude operations.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A ring-shaped prefabricated concrete wind turbine tower, characterized in that, include: The top component, middle component, and bottom component are arranged sequentially in a vertical direction. The top component includes a first annular body and a first arc-shaped component, with the first arc-shaped component located at the bottom of the first annular body. The middle component includes two second arc-shaped components that are connected vertically and at least partially overlap in the horizontal direction, with their opening directions facing each other. The bottom component includes a second annular body and a third arc-shaped component, with the third arc-shaped component located at the top of the second annular body. The first arc-shaped component and the second arc-shaped component are joined together to form an annular shape, and the second arc-shaped component and the third arc-shaped component are joined together to form an annular shape. The annular shape, the first annular body, and the second annular body have the same diameter and are concentric.

2. The annular prefabricated concrete wind turbine tower according to claim 1, characterized in that, The first arc-shaped component and the second arc-shaped component are respectively provided with a first convex key and a first concave key on the side surface of the first arc-shaped component and the third arc-shaped component in the horizontal direction. The first convex key is arranged on the side surface of the second arc-shaped component and cooperates with the first concave key on the side surface of the first arc-shaped component and the third arc-shaped component.

3. The annular prefabricated concrete wind turbine tower according to claim 1, characterized in that, It also includes a second convex key and a second concave key. The second convex key is arranged on the top surface of the second arc-shaped member and the third arc-shaped member, and the second concave key is arranged on the bottom surface of the first arc-shaped member and the second arc-shaped member. The second convex key and the second concave key cooperate with each other.

4. The annular prefabricated concrete wind turbine tower according to claim 1, characterized in that, It also includes protruding teeth, which are respectively arranged on the sides of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member, and the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member can mesh with each other through the protruding teeth.

5. The annular prefabricated concrete wind turbine tower according to claim 4, characterized in that, It also includes first bolt channels. Multiple first bolt channels are arranged on the top surfaces of the first arc-shaped component, the second arc-shaped component, and the third arc-shaped component. The first bolt channels extend in the vertical direction. The first bolt channels of the top component, the middle component, and the bottom component correspond one-to-one in the vertical direction and are connected.

6. The annular prefabricated assembled concrete wind turbine tower according to claim 5, characterized in that, It also includes a second bolt hole, which corresponds one-to-one with the protruding teeth. The extension direction of the second bolt hole is perpendicular to the first bolt hole. The second bolt hole is used to mate with a high-strength arc bolt.

7. The annular prefabricated concrete wind turbine tower according to claim 2, characterized in that, It also includes prestressed steel bar ducts, which are distributed at intervals with the first convex key on the top surfaces of the first arc-shaped member, the second arc-shaped member, and the third arc-shaped member. The prestressed steel bar ducts of the top member, the middle member, and the bottom member correspond one-to-one in the vertical direction and are connected.

8. The annular prefabricated concrete wind turbine tower according to claim 1, characterized in that, The arc of the first arc-shaped component, the second arc-shaped component, and the third arc-shaped component is 1 / 2 to 2 / 3 of the circumference.

9. A method for assembling a ring-shaped prefabricated concrete wind turbine tower, characterized in that, Includes the following steps: The bottom component is installed and positioned, and the second annular body of the bottom component is fixed to the wind power foundation to ensure that the axis of the second annular body is vertical. The third arc-shaped component is arranged in the preset assembly position of the second annular body. The middle component is installed by assembling the second arc-shaped part of the middle component and the third arc-shaped part of the bottom component to form a ring. The first convex key on the side of the second arc-shaped part and the first concave key on the side of the third arc-shaped part are engaged and positioned. At the same time, the second concave key on the bottom surface of the second arc-shaped part and the second convex key on the top surface of the third arc-shaped part are engaged, and the protruding teeth of the two are meshed with each other. The second bolt holes are aligned, and the high-strength arc bolts are inserted into the second bolt holes and tightened to achieve circumferential fixation of the bottom component and the middle component. The top component is installed by hoisting it above the middle component, so that the first arc-shaped part at the bottom of the top component and the second arc-shaped part at the top of the middle component are joined to form a ring. The first concave key on the side of the first arc-shaped part and the first convex key on the side of the second arc-shaped part are engaged and positioned. At the same time, the second concave key on the bottom surface of the first arc-shaped part and the second convex key on the top surface of the second arc-shaped part are engaged, and the protruding teeth of the two are meshed with each other. The second bolt holes are aligned, and the high-strength arc bolts are inserted into the second bolt holes and tightened to achieve circumferential fixation of the top component and the middle component. The first annular body of the top component, the ring formed by the middle component and the upper and lower arc-shaped parts, and the second annular body of the bottom component have the same diameter and are concentric. Prestress is applied by inserting prestressed steel bars into the prestressed ducts that run vertically through the wind turbine tower. The prestressed steel bars are tensioned to the design tension and then fixed by anchors. Then, non-shrink high-strength grout is injected into the prestressed ducts under pressure. After the grout solidifies and hardens, vertical prestressing is formed. The annular joints formed by the assembly of each arc-shaped component and the installation points of the prestressed anchors are sealed to complete the assembly of the entire annular prefabricated concrete wind turbine tower.

10. The assembly method for a ring-shaped prefabricated concrete wind turbine tower according to claim 9, characterized in that: The assembly of intermediate components is repeated according to the height of the tower. The next intermediate component is then assembled on top of one intermediate component. The second arc-shaped parts of the two intermediate components are engaged by convex and concave keys, their protruding teeth mesh with each other, and the second bolt holes are aligned. High-strength arc bolts are inserted into the second bolt holes and tightened.

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