Fabricated wind power tower

Abstract

This invention relates to the field of wind turbine tower structure technology, specifically a prefabricated wind turbine tower, comprising an upper prefabricated section and a lower prefabricated section. The upper end face of the lower prefabricated section has a coaxially formed annular mounting groove, within which multiple positioning rods are evenly distributed around the circumference. The lower end face of the upper prefabricated section has a coaxially mounted mounting ring, with the same number of positioning grooves as the positioning rods evenly distributed around its circumference. By hoisting the upper prefabricated section and aligning it with the lower prefabricated section, the spiral positioning groove of the upper section's mounting ring contacts the positioning rods in the lower section's mounting groove. Gravity causes the positioning rods to roll along the groove, causing the upper section to rotate naturally and automatically slide into alignment. This reduces reliance on hoisting precision and solves the problem of requiring strict matching of flange bolt holes in traditional systems. Simultaneously, the positioning and engagement form a stable initial connection, ensuring the stability of the docking node, reducing the risks and time of high-altitude operations, improving installation efficiency, and guaranteeing the tower's load-bearing capacity and long-term reliability.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower structure technology, specifically to a prefabricated wind turbine tower. Background Technology

[0002] Prefabricated wind turbine tower technology is based on "factory prefabrication and on-site splicing". It breaks down the tower into multiple standardized prefabricated sections and completes the splicing on-site through flange connection, which is suitable for onshore and offshore wind farms. However, there are obvious difficulties in the hoisting and installation process. High-altitude flange connection requires strict coaxiality and bolt hole alignment accuracy, which is easily affected by wind speed and crane sway. Single section connection is time-consuming and risky. At the same time, it relies on large-tonnage special cranes, which are limited in complex terrain and sites, and are costly. Insufficient hoisting buffer protection can easily lead to component damage. The multi-stage coordination has a low fault tolerance rate, and mistakes can easily lead to safety accidents or project delays.

[0003] To address the aforementioned problems, existing technologies have proposed several solutions. For example, patent application CN202110798983.8 discloses a guiding, positioning, and buffering device for the overall hoisting of offshore wind turbine units. This solution involves hoisting the wind turbine tower into a tower foundation. Several guide columns are fixed on the circumference of the lower end of the tower support, and several corresponding guide cylinders are fixed on the tower foundation platform. The guide cylinders are connected to the ocean via pipes, water pumps, check valves, and shut-off valves. A liquid level sensor is installed near the upper end of the guide cylinder. The liquid level sensor, water pump, check valve, and shut-off valve are connected to a controller. During the hoisting of the wind turbine tower into the tower foundation, several guide columns are inserted into the corresponding guide cylinders for positioning. The wind turbine tower flanges are connected together with bolts and nuts. This device utilizes inexpensive seawater resources to achieve a buffering effect, reducing wind power installation costs and mitigating the risks posed by waves. However, the device consists of multiple systems, including mechanical, fluid, and electrical control components, which require coordinated operation. Key structures and modular assembly require high precision, making design, assembly, and debugging complex. Furthermore, the manufacturing cost of marine-resistant components and high-precision structures is high, installation requires a professional team, and components are susceptible to seawater corrosion, electrical control components have a high failure rate, and maintenance costs are also high. While relying on seawater, it is also susceptible to blockage and corrosion due to impurities and salt content. Hoisting requires waiting for the seawater to be filled and is limited by wave cycles, wind speeds, and wave heights. The limited space on the offshore platform further increases the difficulty of modular assembly and pipeline layout. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated wind turbine tower to solve the problems of complex assembly and commissioning, high manufacturing cost, and insufficient on-site hoisting accuracy caused by the difficulty of on-site operation of existing prefabricated wind turbine towers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A prefabricated wind turbine tower includes an upper prefabricated section and a lower prefabricated section. The upper prefabricated section is installed on the upper end face of the lower prefabricated section. An annular mounting groove is coaxially formed on the upper end face of the lower prefabricated section. Multiple positioning rods are evenly distributed around the circumference of the mounting groove. The axes of the multiple positioning rods are perpendicular to the axis of the lower prefabricated section, and the extensions of the axes of the multiple positioning rods intersect at a point. An mounting ring is coaxially installed on the lower end face of the upper prefabricated section. The mounting ring has a number of positioning grooves evenly distributed around its circumference, the same number as the number of positioning rods. The multiple positioning grooves spirally open upwards along the lower end face of the mounting ring. By lifting the upper prefabricated section and aligning it with the lower prefabricated section, the spirally opened positioning grooves on the mounting ring at the lower end of the upper prefabricated section are lowered. The positioning groove contacts the positioning rod in the installation groove of the lower precast cylindrical section. With the help of gravity, the positioning rod rolls along the spiral positioning groove, causing the upper precast cylindrical section to rotate naturally and automatically slide into the bottom of the groove to complete precise alignment, without the need for manual adjustment of bolt hole alignment. This design, through the automatic guidance and adaptation of the spiral positioning structure, fundamentally reduces the dependence on the precision of high-altitude hoisting and solves the problem of strict matching of bolt holes in traditional flange docking. At the same time, the cooperation between the positioning rod and the spiral positioning groove forms a stable initial connection, ensuring the structural stability of the tower docking node, reducing the safety risks and construction time of high-altitude adjustment operations, improving installation efficiency, and further ensuring the overall load-bearing capacity and long-term operational reliability of the tower through the precise adaptation of the mechanical structure.

[0007] Preferably, the lower end face of the mounting ring is provided with multiple locking grooves, and the upper end face of the lower precast cylinder section is provided with multiple sliding grooves evenly distributed. Locking blocks are slidably connected within each of the multiple sliding grooves, and locking springs are installed within each of the multiple sliding grooves. The upper and lower ends of the multiple locking springs are respectively connected to the lower end of the locking block and the inner wall of the lower end of the sliding groove. The inner wall of the lower precast cylinder section is provided with unlocking grooves corresponding to the number of locking blocks. The multiple unlocking grooves are respectively connected to the multiple sliding grooves. Unlocking blocks are installed on the end faces of the multiple locking blocks near the central axis of the lower precast cylinder section, and the multiple unlocking blocks are slidably connected within the multiple unlocking grooves. When the lower end face of the mounting ring contacts the inner wall of the lower end of the mounting groove, the multiple locking blocks are respectively embedded within the multiple locking grooves. When the mounting ring of the upper precast cylinder section descends and docks, the lower end face of the mounting ring will first press against the locking blocks of the lower precast cylinder section, causing the locking blocks to... The compression locking spring moves downward along the slide groove, while the locking spring also provides pre-buffering for the mounting ring. When the mounting ring contacts the inner wall of the lower end of the mounting groove, the locking block automatically springs into the locking groove of the mounting ring under the elastic force of the locking spring, achieving mechanical locking of the upper and lower cylinder sections. This prevents relative displacement caused by wind loads, vibrations, etc. after docking. When disassembly is required later, the unlocking block in the unlocking groove on the inner side of the lower prefabricated cylinder section is operated to drive the locking block to move downward along the slide groove and exit the locking groove, thus completing the unlocking. This design, through the cooperation of the spring-driven locking block and the locking groove, avoids the problems of easy cylinder section shaking before tightening and high risk of manual fixing at high altitudes in traditional bolt connections. At the same time, the unlocking structure solves the problem of difficulty in separating the cylinder section during later maintenance or replacement. It ensures the immediate stability, installation safety, and maintenance convenience of the tower docking node, and improves the wind vibration resistance and long-term operational reliability of the overall structure.

[0008] Preferably, guide grooves are formed on the upper surfaces of the multiple locking blocks, the longitudinal sections of the multiple guide grooves are V-shaped, the width of the multiple guide grooves is greater than the width of the mounting groove, and the upper surfaces of the multiple guide grooves are higher than the multiple positioning rods; guide grooves are formed on the upper surfaces of the multiple locking blocks, the longitudinal sections of the multiple guide grooves are V-shaped, the width of the multiple guide grooves is greater than the width of the mounting groove, and the upper surfaces of the multiple guide grooves are higher than the multiple positioning rods; by setting guide grooves with V-shaped longitudinal sections, a width greater than the mounting groove, and an upper surface higher than the positioning rods on the upper surfaces of the locking blocks, key guiding and protective functions are played during the high-altitude docking of the upper and lower precast cylinder sections: when the mounting ring of the upper precast cylinder section descends with hoisting, even if there is a slight coaxiality deviation, the lower surface of the mounting ring will preferentially contact the inclined surface of the V-shaped guide groove. At this time, the V-shaped structure utilizes the guiding characteristics of the inclined surface to convert the offset force of the mounting ring into a lateral correction force along the inclined surface, guiding the mounting ring from... The guide groove is wider than the installation groove, expanding the enclosure and guiding range of the installation ring and further reducing the impact of hoisting deviations. The design of the guide groove's upper surface being higher than the positioning rod ensures that the installation ring is first aligned with the positioning rod and positioning groove after being aligned with the guide groove, preventing misalignment and failure to slide smoothly due to installation ring offset. This avoids problems such as the installation ring being difficult to align with the installation groove, the locking block colliding and getting stuck with the installation ring, and the positioning rod and positioning groove not fitting precisely during high-altitude docking of prefabricated wind turbine towers due to hoisting deviations. It ensures the smoothness of the tower docking process, improves the positioning accuracy and efficiency of high-altitude installation, reduces the risk of collision damage to metal components, lays the foundation for the subsequent smooth embedding of the locking block into the locking groove of the installation ring and achieving reliable mechanical fixation, further enhances the structural stability of the docking node, and ensures the overall installation quality and long-term operational safety of the tower.

[0009] Preferably, an annular anti-collision pad is installed on the lower end face of the mounting ring. The annular anti-collision pad is made of 40-50 Shore A rubber material, and the entrance ends of the multiple positioning slots are all machined with arc transition sections. By setting the annular anti-collision pad of 40-50 Shore A rubber material on the lower end face of the mounting ring and machining the arc transition sections at the entrance ends of the positioning slots, a dual protection and guiding function is provided when the upper and lower precast cylinder sections are docked at high altitude: In the initial stage of docking, during the descent of the mounting ring of the upper precast cylinder section, the annular anti-collision pad will first contact the edge or upper end face of the mounting slot of the lower precast cylinder section. Utilizing the elastic buffering characteristics of the rubber material, it absorbs the impact force caused by slight shaking during hoisting, avoiding structural deformation caused by direct hard collision between the mounting ring and the metal surface of the lower precast cylinder section. Surface damage; as the installation ring continues to descend, and the positioning groove needs to mate with the positioning rod of the lower prefabricated cylinder section, the arc transition section at the entrance of the positioning groove will guide the positioning rod to slide smoothly into the groove, avoiding jamming caused by direct contact between the positioning rod and the right-angle edge of the positioning groove entrance. Especially when the installation ring rotates and aligns with the spiral positioning groove, the arc transition section can reduce the frictional resistance between the two, preventing component wear caused by local stress concentration; it avoids the problem of component collision damage during high-altitude docking of prefabricated wind turbine towers, as well as the jamming and wear problems when the positioning rod mates with the positioning groove; it ensures the structural integrity of the prefabricated cylinder section of the tower, reduces rework due to collision or jamming, improves the smoothness and efficiency of high-altitude installation, and reduces the impact of component wear on the long-term stability of the docking node, further ensuring the overall installation quality and service life of the tower.

[0010] Preferably, a first guide surface is machined on the side wall at the upper end of the mounting groove. The first guide surface is arc-shaped and is heat-treated to achieve a hardness between 60 HRC and 65 HRC. By machining an arc-shaped first guide surface on the side wall at the upper end of the mounting groove and heat-treating it to a hardness of 60 HRC to 65 HRC, it provides precise guidance and wear-resistant protection during the docking of the upper and lower precast cylindrical sections. During docking, when the mounting ring of the upper precast cylindrical section descends close to the mounting groove of the lower precast cylindrical section, even if there is a slight coaxiality deviation during hoisting, the outer edge of the mounting ring will first contact the arc-shaped first guide surface. The arc structure can convert the offset force of the mounting ring into a smooth guiding force along the guide surface, guiding the mounting ring to automatically correct its position and slide coaxially into the mounting groove. This design avoids direct impact between the mounting ring and the edge of the mounting groove due to misalignment. Simultaneously, the high hardness treatment (60HRC to 65HRC) gives the first guide surface excellent wear resistance, enabling it to withstand the friction and compression during mounting ring docking for extended periods. This prevents wear and deformation of the guide surface after repeated docking, ensuring stable guiding accuracy. It also avoids problems such as misalignment of the mounting ring with the mounting groove, component edge damage due to hoisting deviations during high-altitude docking of prefabricated wind turbine towers, and guide surface wear failure during long-term use. This ensures the accuracy and smoothness of tower docking, reduces high-altitude adjustment time and component damage risk, improves installation efficiency, and extends the service life of the guide structure through high-hardness and wear-resistant design, ensuring long-term structural stability of the docking node and further solidifying the overall installation quality and operational reliability of the tower.

[0011] Preferably, each of the multiple positioning rods is rotatably connected to a roller, and each of the multiple rollers has a buffer layer on its outer surface. The buffer layers are made of polyurethane elastic material, and their outer surfaces are machined with spiral anti-slip textures. By rotatably connecting rollers to the positioning rods, providing polyurethane elastic material buffer layers to the rollers, and machining spiral anti-slip textures on the outside of the buffer layers, a synergistic effect of "rolling guidance - buffering and shock absorption - anti-slip positioning" is formed during the docking process of the upper and lower precast cylinder sections: when the spiral positioning groove of the mounting ring contacts the positioning rod, the roller converts the sliding friction between the positioning groove and the positioning rod into rolling friction, significantly reducing the resistance during their engagement and preventing the positioning groove or positioning rod from jamming due to excessive friction, making it difficult to smoothly align along the spiral trajectory; the polyurethane buffer layer utilizes its elastic properties to absorb the vibration and impact when the roller contacts the positioning groove during the docking process, preventing... The direct, hard collision between the metal rollers and the positioning groove causes localized wear or deformation. Simultaneously, the spiral anti-slip texture on the outside of the buffer layer aligns with the rotation direction of the positioning groove, increasing friction between the rollers and the inner wall of the groove. This prevents the rollers from slipping due to slight swaying or vibration during high-altitude hoisting, ensuring the positioning rod slides precisely along the spiral trajectory of the positioning groove, achieving stable alignment of the upper and lower sections. This avoids problems such as jamming due to excessive sliding friction, wear and deformation due to hard contact, and alignment deviations caused by slippage during the docking of prefabricated wind turbine towers. It guarantees smooth and accurate high-altitude tower docking, reduces the risk of component damage, and improves installation efficiency. Furthermore, the buffering, shock absorption, and anti-slip design enhances the stability of the docking process, laying the foundation for reliable subsequent locking structure cooperation and further ensuring the structural integrity and long-term operational reliability of the tower docking node.

[0012] Preferably, the multiple rollers and multiple positioning rods are connected by multiple needle roller bearings, which are evenly distributed along the roller axis. The cross-sections of the multiple buffer layers are all arc-shaped structures, thicker in the middle and thinner at the edges. By using multiple axially evenly distributed needle roller bearings between the rollers and positioning rods, and designing the buffer layers as arc-shaped structures with a thicker middle and thinner edges, a key role is played in the core mating process of the upper and lower precast cylinder sections: when the spiral positioning groove of the mounting ring contacts the roller and drives the roller to rotate, the multiple axially evenly distributed needle roller bearings can evenly distribute the radial pressure applied to the roller by the positioning groove to each needle roller. Compared with a single set of bearings or other bearing types, this significantly improves the radial load-bearing capacity of the roller, avoiding bearing jamming or axial deformation of the roller due to excessive force at a single point. Simultaneously, the compact structure of the needle roller bearings can adapt to the installation space of the positioning rods and rollers, ensuring smooth rotation. The arc-shaped structure of the buffer layer... The curved structure better matches the curvature of the positioning groove's inner wall. During docking, the thicker middle section can withstand the main pressure, and the deformation of the polyurethane elastic material absorbs vibration and impact. The thinner edge design reduces the resistance when the buffer layer enters the positioning groove, avoiding jamming caused by excessively thick edges. Furthermore, the arc-shaped structure increases the contact area between the buffer layer and the positioning groove, further dispersing local stress and reducing local wear of the buffer layer. This avoids problems such as roller jamming due to insufficient load, deformation due to uneven stress, and jamming or excessive local wear caused by poor compatibility between the buffer layer and the positioning groove during the docking of prefabricated wind turbine towers. It ensures smooth roller rotation and long-term load-bearing stability, improves the wear resistance and service life of the buffer layer, and ensures precise sliding of the positioning rod along the spiral trajectory of the positioning groove. This, in turn, guarantees the accuracy and smoothness of high-altitude tower docking, reduces the risk of component damage, and provides support for the structural stability and long-term operational reliability of the docking node.

[0013] Preferably, a sealing ring is coaxially mounted on the lower end face of the upper precast cylinder section, and the diameter of the sealing ring is larger than that of the mounting ring. An annular sealing groove is coaxially formed on the outer wall of the upper end face of the lower precast cylinder section, and a sealing ring is mounted on the lower end face of the sealing groove. A second guide surface is machined on the inner wall of the lower end face of the sealing ring and the outer wall of the upper end face of the sealing groove. By coaxially mounting a sealing ring with a diameter larger than that of the mounting ring on the lower end of the upper precast cylinder section and forming an annular sealing groove on the outer wall of the upper end of the lower precast cylinder section, a sealing ring with a diameter larger than that of the mounting ring is formed on the lower end of the lower precast cylinder section. The groove incorporates a built-in sealing ring, and a second guide surface is machined on the inner wall of the lower end face of the sealing ring and the outer wall of the upper end face of the sealing groove. This achieves a dual function of "precise guidance and reliable sealing" during the docking of the upper and lower precast cylinder sections: During docking, the upper precast cylinder section descends, and the sealing ring contacts the lower precast cylinder section before the mounting ring. If there is a slight coaxiality deviation during hoisting, the second guide surface on the inner wall of the sealing ring and the second guide surface on the outer wall of the sealing groove will engage through an inclined surface, converting the offset force of the sealing ring into a corrective force, guiding the... The sealing ring automatically aligns with the sealing groove and slides smoothly in, avoiding misalignment and jamming caused by deviations, thus preventing precise fitting. Once fully inside the sealing groove, its lower end compresses the sealing ring within, causing elastic deformation and filling the gap between the sealing ring and the groove. The sealing ring's diameter is larger than the installation ring, covering the connection area between the installation ring and the installation groove, forming a double protection of "outer sealing ring + inner sealing ring." This prevents external corrosive media such as rainwater and dust from invading the tower through the joint. It avoids misalignment and jamming caused by installation deviations in the sealing structure during the docking of prefabricated wind turbine towers, as well as corrosion of internal components such as positioning rods and locking blocks due to inadequate sealing at the docking node and intrusion of external media. This ensures smooth and precise installation of the sealing structure, improves the sealing performance and corrosion resistance of the docking node, prevents internal metal components from failing due to corrosion, and thus guarantees the long-term structural stability and overall operational reliability of the tower docking node, extending the tower's service life.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. This invention aligns the upper precast cylindrical section with the lower precast cylindrical section during hoisting. The spiral positioning groove of the upper section's mounting ring contacts the positioning rod of the lower section's mounting groove. Gravity causes the positioning rod to roll along the groove, naturally rotating the upper section and automatically sliding it into position. This reduces reliance on hoisting precision and solves the problem of requiring strict matching of flange bolt holes in traditional methods. Simultaneously, the positioning and mating form a stable initial connection, ensuring the stability of the docking node, reducing the risks and time required for high-altitude operations, improving installation efficiency, and guaranteeing the tower's load-bearing capacity and long-term reliability.

[0016] 2. This invention presses down on the locking block when the upper prefabricated cylindrical section installation ring descends, compressing the locking spring and causing it to move downwards. The spring simultaneously provides pre-buffering. After docking, the locking block springs into the locking groove under spring force, achieving mechanical locking and preventing displacement. Later, the locking block can be unlocked by using an unlocking block. This design avoids the problems of easy shaking before tightening and high-altitude fixing risks associated with traditional bolted connections, solves the difficulty of separation during later maintenance, ensures the immediate stability of the docking node, installation safety, and ease of maintenance, and improves wind resistance and long-term reliability.

[0017] 3. This invention features a V-shaped guide groove at the upper end of the locking block, wider than the mounting groove and higher than the positioning rod. During high-altitude docking, even if the mounting ring has a slight deviation, it will first contact the inclined surface of the guide groove. The V-shaped structure converts the offset force into a corrective force, guiding the mounting ring to adjust its position and preventing collisions and jamming. The wide guide groove expands the containment range, and the high positioning design ensures that calibration is performed before engaging with the positioning rod, preventing misalignment. This design solves problems such as difficulty in aligning the mounting ring and component collisions caused by hoisting deviations, ensuring smooth docking, improving accuracy and efficiency, reducing damage, and strengthening the locking foundation and structural stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the prefabricated wind turbine tower of the present invention;

[0019] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is a front view of the prefabricated wind turbine tower of the present invention;

[0021] Figure 4 This is an exploded view of the prefabricated wind turbine tower of the present invention;

[0022] Figure 5 This is a diagram showing the state of the upper and lower prefabricated sections of the prefabricated wind turbine tower when they are installed in place.

[0023] Figure 6 This is a schematic diagram of the positioning rod, roller, buffer layer, anti-slip texture, and needle roller bearing in the prefabricated wind turbine tower of the present invention;

[0024] Figure 7 This is a schematic diagram of the locking block, locking spring, and unlocking block in the prefabricated wind turbine tower of the present invention.

[0025] In the diagram: 101, upper precast cylindrical section; 102, lower precast cylindrical section; 2, mounting groove; 3, positioning rod; 301, roller; 302, buffer layer; 303, anti-slip texture; 304, needle roller bearing; 4, mounting ring; 401, positioning groove; 402, locking groove; 403, anti-collision pad; 404, arc transition section; 501, sliding groove; 502, locking block; 503, locking spring; 504, guide groove; 505, unlocking groove; 506, unlocking block; 601, first guide surface; 602, second guide surface; 701, sealing ring; 702, sealing groove; 703, sealing ring. Detailed Implementation

[0026] Please see Figures 1 to 7 This invention provides a prefabricated wind turbine tower, the technical solution of which is as follows:

[0027] A type of prefabricated wind turbine tower, please refer to Figures 1 to 7The assembly includes an upper precast cylindrical section 101 and a lower precast cylindrical section 102. The upper precast cylindrical section 101 is installed on the upper end face of the lower precast cylindrical section 102. An annular mounting groove 2 is coaxially formed on the upper end face of the lower precast cylindrical section 102. A first guide surface 601 is machined on the side wall at the upper end of the mounting groove 2. The first guide surface 601 is arc-shaped and is heat-treated to a hardness of 62 HRC. A sealing ring 701 is coaxially installed on the lower end face of the upper precast cylindrical section 101. The diameter of the sealing ring 701 is larger than the diameter of the mounting ring 4. An annular sealing groove 702 is coaxially formed on the outer side wall of the upper end face of the lower precast cylindrical section 102. A sealing ring 703 is installed on the lower end face of the sealing groove 702. The inner wall of the lower end face and the outer wall of the upper end face of the sealing groove 702 are both machined with second guide surfaces 602. Multiple positioning rods 3 are evenly distributed around the circumference of the mounting groove 2. The axes of the multiple positioning rods 3 are perpendicular to the axis of the lower precast cylindrical section 102, and the extension lines of the axes of the multiple positioning rods 3 intersect at a point. An mounting ring 4 is coaxially mounted on the lower end face of the upper precast cylindrical section 101. Positioning grooves 401, the same number as the multiple positioning rods 3, are evenly distributed around the circumference of the mounting ring 4. The multiple positioning grooves 401 spiral upwards along the lower end face of the mounting ring 4. Multiple locking grooves 402 are formed on the lower end face of the mounting ring 4. Multiple sliding grooves 501 are evenly distributed on the upper end face of the lower precast cylindrical section 102. Locking blocks 502 are slidably connected within each of the multiple sliding grooves 501. Each of the 501 sections is equipped with a locking spring 503. The upper and lower ends of the multiple locking springs 503 are respectively connected to the lower end of the locking block 502 and the inner wall of the lower end of the slide groove 501. The inner side wall of the lower precast cylindrical section 102 is provided with unlocking grooves 505 corresponding to the number of locking blocks 502. The multiple unlocking grooves 505 are respectively connected to the multiple slide grooves 501. Each of the multiple locking blocks 502 is equipped with an unlocking block 506 on the end face near the central axis of the lower precast cylindrical section 102. The multiple unlocking blocks 506 are slidably connected in the multiple unlocking grooves 505. When the lower end face of the mounting ring 4 contacts the lower inner wall of the mounting groove 2, the multiple locking blocks 502 are respectively embedded in the multiple locking grooves 402. Each of the upper end faces of the multiple locking blocks 502 is provided with a guide groove 504. The longitudinal section of the mounting ring 4 is V-shaped. The width of the multiple guide grooves 504 is greater than the width of the mounting groove 2. The upper end face of the multiple guide grooves 504 is higher than the multiple positioning rods 3. An annular anti-collision pad 403 is installed on the lower end face of the mounting ring 4. The annular anti-collision pad 403 is made of 46 Shore A rubber material. The entrance end of the multiple positioning grooves 401 is machined with an arc transition section 404. Rollers 301 are rotatably connected to the multiple positioning rods 3. A buffer layer 302 is sleeved on the outer surface of the multiple rollers 301. The multiple buffer layers 302 are made of polyurethane elastic material, and the outer surface of the multiple buffer layers 302 is machined with a spiral anti-slip texture 303. The multiple rollers 301 and the multiple positioning rods 3 are connected by multiple needle roller bearings 304.Multiple needle roller bearings 304 are evenly distributed along the axial direction of the roller 301, and the cross-sections of multiple buffer layers 302 are all arc-shaped structures that are thicker in the middle and thinner at the edges.

[0028] When working, please refer to Figures 1 to 7 First, a large-tonnage wind power-specific crane is used to vertically lift the upper precast section 101 using the positioning rod 3 at the top. During the lifting process, the crane's luffing and slewing mechanisms are used to adjust the posture of the upper precast section 101 so that its solid axis roughly coincides with the solid axis of the lower precast section 102. The upper end face of the lower precast section 102 is initially aligned. The crane is then slowly lowered into place. When the lower mounting ring 4 descends to about 10-15cm from the mounting groove 2 of the lower precast section 102, the annular anti-collision pad 403, which is coaxially mounted on the lower end face of the mounting ring 4, first contacts the upper edge of the mounting groove 2 of the lower precast section 102. The elastic deformation of the rubber material absorbs the impact energy generated by wind speed and mechanical shaking during the lifting process, preventing the mounting ring 4 from directly colliding with the lower precast section 102 and preventing damage such as dents and scratches on the surfaces of both, while also reducing the swaying amplitude of the upper precast section 101.

[0029] As the upper precast cylindrical section 101 continues to descend slowly, the outer circumferential surface of the mounting ring 4 gradually approaches the side wall at the upper end of the mounting groove 2. At this point, the first guide surface 601 machined at the upper end of the mounting groove 2 comes into play. Even if the upper precast cylindrical section 101 has a coaxiality deviation of ±3° to ±5°, the outer edge of the mounting ring 4 will slide smoothly along the arc-shaped first guide surface 601. The arc structure converts the offset force of the mounting ring 4 into a lateral component force along the guide surface, guiding the upper precast cylindrical section 101 to automatically adjust its posture and gradually correct its coaxiality, laying the foundation for the subsequent positioning structure to cooperate. As the upper precast cylindrical section 101 continues to descend, the evenly distributed positioning grooves 40 on the circumference of the mounting ring 4... 1. The positioning rods 3, which are evenly distributed around the inner circumference of the mounting groove 2 of the lower precast cylindrical section 102, officially come into contact. At this time, the rollers 301 rotatably connected to the positioning rods 3 become the core force-bearing components and directly fit against the inner wall of the positioning groove 401. Under the action of gravity, the upper precast cylindrical section 101 tends to move downward. The inclined surface of the positioning groove 401 will generate a thrust on the rollers 301 along the spiral trajectory, causing the rollers 301 to rotate around the positioning rods 3. This process transforms the "sliding friction" between the positioning rods 3 and the positioning groove 401 into "rolling friction", which greatly reduces the resistance of the two to the cooperation and avoids wear on the inner wall of the positioning groove 401 or jamming of the positioning rods 3 due to excessive friction.

[0030] The roller 301 and the positioning rod 3 are connected by needle roller bearings 304 evenly distributed along the axial direction of the roller 301. The compact structure of the needle roller bearings 304 can not only adapt to the installation space of the positioning rod 3 and the roller 301, but also evenly distribute the radial pressure applied to the roller 301 by the positioning groove 401 to each set of needle rollers. As the roller 301 rolls along the positioning groove 401, the upper precast cylindrical section 101 will rotate naturally under the guidance of the spiral trajectory, and the positioning rod 3 will gradually slide towards the bottom of the positioning groove 401 along the groove wall. When the positioning rod 3 slides completely into the bottom of the positioning groove 401, the circumferential position of the upper and lower precast cylindrical sections 102 is completely aligned, and the axial deviation can be controlled within ±2mm, realizing automatic and precise alignment without manual adjustment of bolt holes, solving the problem of repeated calibration of bolt holes in traditional flange docking.

[0031] As the positioning rod 3 slides into the positioning groove 401, the lower end face of the mounting ring 4 gradually approaches the locking block 502 on the upper end face of the lower precast cylindrical section 102; the V-shaped guide groove 504 machined on the upper end face of the locking block 502 will first contact the mounting ring 4; if the mounting ring 4 still has a slight radial offset, the inclined surface of the V-shaped guide groove 504 will generate a lateral corrective force on the mounting ring 4, guiding the mounting ring 4 to move directly upwards towards the slide groove 501, avoiding the mounting ring 4 directly hitting the edge of the locking block 502 and causing deformation of both, while preventing the mounting ring 4 from getting stuck in the gap between the mounting groove 2 and the locking block 502; as the mounting ring 4 continues to descend, its lower end face will completely press against the inclined surface of the V-shaped guide groove 504, pushing the locking block 502 to move downwards along the slide groove 501, at which time the locking spring 503 in the slide groove 501 is compressed; the locking spring 50 3. During the compression process, it not only serves to "buffer the impact of the descending mounting ring 4", but also maintains the tight contact between the locking block 502 and the mounting ring 4 through elasticity, preventing the mounting ring 4 from detaching from the locking block 502 due to shaking. When the lower end face of the mounting ring 4 is in complete contact with the inner wall of the lower end of the mounting groove 2, the position of the locking block 502 is exactly aligned with the locking groove 402 on the lower end face of the mounting ring 4. At this time, the locking spring 503 is no longer under compression force and quickly releases elasticity, pushing the locking block 502 to move upward until the locking block 502 is completely embedded in the locking groove 402. This process can be completed within 1-2 seconds, realizing the instantaneous mechanical locking of the upper and lower prefabricated cylinder sections 102. After locking, the locking block 502 can limit the radial and axial displacement of the upper and lower cylinder sections, effectively preventing relative displacement caused by strong wind load and equipment operation vibration after docking.

[0032] Simultaneously with mechanical locking, the sealing ring 701, coaxially mounted on the lower end face of the upper precast cylindrical section 101, descends synchronously with the mounting ring 4. The inner wall of the lower end face of the sealing ring 701 and the outer wall of the upper end face of the sealing groove 702 of the lower precast cylindrical section 102 are both machined with second guide surfaces 602. These two second guide surfaces 602 cooperate to form a funnel-shaped guiding structure, allowing the sealing ring 701 to smoothly slide into the sealing groove 702 along the inclined surface even with slight misalignment, preventing damage to the sealing surface caused by collision between the sealing ring 701 and the edge of the sealing groove 702. Once the sealing ring 701 is fully inserted into the sealing groove 702, its lower... The end face will contact and continuously apply pressure to the sealing ring 703 installed on the lower end face of the sealing groove 702, causing the sealing ring 703 to undergo elastic deformation and fill all the gaps between the sealing ring 701 and the sealing groove 702. At the same time, the diameter of the sealing ring 701 is larger than that of the mounting ring 4, which can cover the connection gap between the mounting ring 4 and the mounting groove 2, forming a double protection structure of "outer sealing ring 701 blocking large particulate impurities + inner sealing ring 703 blocking moisture", which effectively prevents corrosive media such as rainwater, sand, and salt spray from entering the interior of the docking node and avoids the rusting and failure of metal components such as positioning rod 3, needle roller bearing 304, and locking spring 503.

[0033] When the wind turbine tower requires replacement of prefabricated sections or maintenance of internal components, the operator can enter from the inside of the lower prefabricated section 102 and locate the unlocking slot 505 corresponding to the locking block 502. The operator uses a special tool to reach into the unlocking slot 505 and push the unlocking block 506, which is fixedly connected to the locking block 502, downward. The unlocking block 506 drives the locking block 502 to move downward along the slide groove 501, compressing the locking spring 503 until the locking block 502 completely exits the locking slot 402 of the mounting ring 4. At this time, the upper and lower prefabricated sections are connected. The mechanical locking of cylinder section 102 is released; after the lock is released, the crane is restarted to lift the upper precast cylinder section 101. Since there is no rigid constraint between the positioning groove 401 and the positioning rod 3, the upper precast cylinder section 101 can be lifted directly upwards, and the positioning rod 3 rolls in the opposite direction along the positioning groove 401, realizing the smooth separation of the upper and lower precast cylinder sections; the entire unlocking process does not require disassembling the bolts, only 1-2 operators are needed to work inside the tower, and the time is controlled within 30-60 minutes, which greatly reduces the risk of high-altitude operation and maintenance time cost.

[0034] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A prefabricated wind turbine tower, characterized in that, The device includes an upper precast cylindrical section (101) and a lower precast cylindrical section (102). The upper precast cylindrical section (101) is installed on the upper end face of the lower precast cylindrical section (102). An annular mounting groove (2) is coaxially opened on the upper end face of the lower precast cylindrical section (102). Multiple positioning rods (3) are evenly distributed around the circumference of the mounting groove (2). The axes of the multiple positioning rods (3) are perpendicular to the axis of the lower precast cylindrical section (102), and the extension lines of the axes of the multiple positioning rods (3) intersect at a point. An mounting ring (4) is coaxially installed on the lower end face of the upper precast cylindrical section (101). The mounting ring (4) has the same number of positioning grooves (401) as the multiple positioning rods (3) evenly distributed around its circumference. The multiple positioning grooves (401) are spirally opened upward along the lower end face of the mounting ring (4). The lower end face of the mounting ring (4) is provided with multiple locking grooves (402), and the upper end face of the lower precast cylindrical section (102) is provided with multiple sliding grooves (501). Locking blocks (502) are slidably connected within each of the multiple sliding grooves (501), and locking springs (503) are installed within each of the multiple sliding grooves (501). The upper and lower ends of the multiple locking springs (503) are respectively connected to the lower end of the locking block (502) and the inner wall of the lower end of the sliding groove (501). The inner wall of the lower precast cylindrical section (102) is provided with... The number of unlocking slots (505) corresponding to the number of locking blocks (502) is connected to multiple sliding grooves (501). Each of the locking blocks (502) has an unlocking block (506) installed on the end face near the central axis of the lower precast cylinder section (102). The unlocking blocks (506) are slidably connected in the multiple unlocking slots (505). When the lower end face of the mounting ring (4) contacts the lower inner wall of the mounting groove (2), the multiple locking blocks (502) are embedded in the multiple locking slots (402).

2. The prefabricated wind turbine tower according to claim 1, characterized in that: Each of the locking blocks (502) has a guide groove (504) on its upper surface. The longitudinal section of each of the guide grooves (504) is V-shaped. The width of each of the guide grooves (504) is greater than the width of the mounting groove (2). The upper surface of each of the guide grooves (504) is higher than the positioning rods (3).

3. A prefabricated wind turbine tower according to claim 2, characterized in that: An annular anti-collision pad (403) is installed on the lower end surface of the mounting ring (4). The annular anti-collision pad (403) is made of rubber material, and the entrance ends of the plurality of positioning grooves (401) are all machined with arc transition sections (404).

4. A prefabricated wind turbine tower according to claim 1, characterized in that: The upper side wall of the mounting groove (2) is machined with a first guide surface (601). The first guide surface (601) is arc-shaped. The first guide surface (601) is heat-treated. The hardness of the first guide surface (601) after processing is between 60HRC and 65HRC.

5. A prefabricated wind turbine tower according to claim 1, characterized in that: Each of the positioning rods (3) is rotatably connected to a roller (301), and a buffer layer (302) is sleeved on the outer surface of each of the rollers (301). The buffer layers (302) are made of polyurethane elastic material, and the outer surface of the buffer layers (302) is processed with spiral anti-slip texture (303).

6. A prefabricated wind turbine tower according to claim 5, characterized in that: The multiple rollers (301) and the multiple positioning rods (3) are connected by multiple needle roller bearings (304). The multiple needle roller bearings (304) are evenly distributed along the axial direction of the rollers (301). The cross-section of the multiple buffer layers (302) is an arc-shaped structure that is thick in the middle and thin at the edges.

7. A prefabricated wind turbine tower according to claim 1, characterized in that: A sealing ring (701) is coaxially mounted on the lower end face of the upper precast cylindrical section (101). The diameter of the sealing ring (701) is larger than the diameter of the mounting ring (4). An annular sealing groove (702) is coaxially opened on the outer wall of the upper end face of the lower precast cylindrical section (102). A sealing ring (703) is installed on the lower end face of the sealing groove (702). A second guide surface (602) is machined on the inner wall of the lower end face of the sealing ring (701) and the outer wall of the upper end face of the sealing groove (702).

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