Step-by-step reducing type wind turbine generator tower structure and mounting method thereof

Abstract

The invention provides a step-by-step reducing type wind turbine generator tower structure and a mounting method thereof. The step-by-step reducing type wind turbine generator tower structure comprises prefabricated barrels, splicing mechanisms are mounted among the multiple laminated and spliced prefabricated barrels, locking mechanisms are mounted on the splicing mechanisms, and sealing mechanisms are mounted on the splicing mechanisms; the wind power tower is assembled by laminating and splicing a plurality of prefabricated barrels, and the prefabricated barrels are firm and stable after being laminated and spliced by matching the splicing mechanism and the locking mechanism; through the installation of the limiting mechanism, the two prefabricated barrels of which the bottoms are spliced are limited during splicing, so that the prefabricated barrels cannot rotate and loosen; through installation of the sealing mechanism, the sealing mechanism is driven to work after the prefabricated barrels are spliced, the sealing mechanism seals the two prefabricated barrels, and rainwater is prevented from entering the prefabricated barrels; and through the installation of the reinforcing mechanism, the plurality of laminated and spliced prefabricated barrels can be reinforced, so that the plurality of prefabricated barrels are firm and do not loosen.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine tower installation technology, specifically a progressively variable diameter wind turbine tower structure and its installation method. Background Technology

[0002] In the field of wind power development, the wind turbine tower, as a key structure supporting core components such as the rotor and nacelle, directly determines the operational safety and overall construction cost of the wind turbine due to its stability, load-bearing capacity, and installation efficiency. As wind power technology develops towards larger capacity, higher altitudes, and offshore applications, the limitations of traditional integrated cast-in-place or equal-diameter segmented towers are becoming increasingly apparent. On the one hand, transporting integrated towers requires specialized oversized equipment and is significantly restricted by traffic conditions such as bridges and tunnels, especially in mountainous and remote areas, increasing transportation costs. On the other hand, equal-diameter towers require thick steel to meet the requirements for gravity and bending moment resistance at the base, resulting in excessive self-weight. This not only increases the load on the foundation but also amplifies wind load due to the unoptimized windward area at the top, affecting the operational stability of the turbine. To address the aforementioned issues, the industry is gradually promoting the progressively variable diameter wind turbine tower structure. This type of tower breaks down the entire tower into multiple prefabricated sections with progressively increasing diameters from top to bottom. This reduces the weight and size of each section during transport, making it suitable for conventional traffic conditions. Furthermore, the variable diameter design reduces the amount of steel used at the top, achieving an optimized structure that is "stronger at the bottom and lighter at the top," effectively balancing load-bearing capacity and material costs.

[0003] Currently, flange bolt connections are commonly used during the installation of precast towers. This requires repeated adjustments of the precast sections' orientation using a crane to align the bolt holes, a cumbersome and time-consuming process. Furthermore, uneven bolt tightening can lead to poor flange fit, and long-term operation, influenced by wind vibration and temperature changes, can cause bolt loosening, increased flange gaps, and exacerbate tower vibration, potentially posing structural safety hazards. Additionally, the sealing performance at the joints is poor. Wind turbines are mostly deployed outdoors, facing high salt spray and high humidity environments in coastal areas, and dust and rainwater infiltration issues in inland areas. Existing tower joints are sealed only with simple gaskets between flanges. These gaskets are prone to failure due to uneven installation pressure and long-term aging, allowing rainwater, salt, and dust to enter the tower, corroding internal cables, ladders, and other components, shortening equipment lifespan, and increasing maintenance costs. Furthermore, the existing variable-diameter towers are only connected to each prefabricated section by a single flange, without forming a longitudinal overall reinforcement system. Under extreme wind conditions (such as typhoons and strong gusts), the tower is prone to stress concentration due to uneven connection stiffness of each section, which can lead to cracks at the transition points of the variable-diameter structure. At the same time, the connection between the prefabricated section and the fixing ring is mostly made by welding. If the welding quality is not well controlled, fatigue damage can easily occur at the weld, affecting the overall load-bearing capacity of the tower.

[0004] In summary, the current design flaws in the progressively variable diameter wind turbine tower structure regarding splicing and positioning, anti-loosening measures, sealing and protection, overall reinforcement, and ease of installation have become key bottlenecks restricting its large-scale application in complex environment projects and hindering improvements in installation efficiency and operational reliability. Therefore, developing a progressively variable diameter tower structure and its corresponding installation method that features high-precision positioning, automatic anti-loosening measures, efficient sealing, overall reinforcement, and a simplified installation process is of great significance for reducing costs and increasing efficiency in the wind power industry and improving the operational safety of wind turbines. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a progressively variable diameter wind turbine tower structure and its installation method.

[0006] The technical solution adopted by this invention to solve its technical problem is: A stepped variable diameter wind turbine tower structure includes a prefabricated barrel, and a splicing mechanism is installed between multiple stacked prefabricated barrels. A locking mechanism is installed on the splicing mechanism. The splicing mechanism includes a first fixing ring, a first fixing ring is installed on the top of the precast barrel, a second fixing ring is installed on the bottom of the precast barrel, a plurality of positioning blocks are vertically connected to the top of the first fixing ring in a ring-shaped equidistant arrangement, and a plurality of slots are provided at the bottom of the second fixing ring in a ring-shaped equidistant arrangement.

[0007] As a preferred embodiment, the prefabricated barrels are stacked and connected in a progressively variable diameter manner. The prefabricated barrels are hollow frustum-shaped structures, and the diameter of the first fixing ring is equal to the diameter of the second fixing ring spliced ​​at the top.

[0008] As a preferred embodiment, the first fixing ring and the second fixing ring are respectively vertically connected with a plurality of fixing rods arranged in a ring, and the first fixing ring and the second fixing ring are respectively fixedly connected to both ends of the precast barrel through the plurality of fixing rods.

[0009] As a preferred embodiment, the locking mechanism includes a slot, and the bottom of the second fixing ring is provided with a plurality of slots arranged in a ring. The slot is an arc-shaped structure, one end of the slot is connected to the slot, the diameter of the slot is equal to the inner width of the slot, the top diameter of the positioning block is smaller than the diameter of the slot, the bottom diameter of the positioning block is smaller than the outer width of the slot, and the plurality of positioning blocks are slidably connected to the inside of the slot.

[0010] As a preferred embodiment, the bottom of the positioning block extends into the second fixing ring and the interior of the fixing rod. The bottom of the positioning block slides elastically with the interior of the fixing rod via a telescopic spring. The positioning block is a cylindrical "I"-shaped structure.

[0011] As a preferred embodiment, the splicing mechanism is equipped with a sealing mechanism, which includes a sealing ring. The sealing ring is engaged with the outer bottom of the second fixing ring. The sealing ring is a hollow annular structure, and the outer side of the sealing ring abuts against another first fixing ring.

[0012] As a preferred embodiment, the second fixing ring is equipped with a plurality of airbags that are equidistantly distributed in a ring. One end of each airbag is slidably connected to the inside of the second fixing ring, and one end of each airbag is provided with a pressure plate.

[0013] As a preferred embodiment, a top rod is installed at the center of one side of the pressure plate, one end of the top rod extends into the groove, the top rod, the pressure plate and the second fixing ring are slidably connected, and the airbag and the sealing ring are connected by a connecting pipe.

[0014] As a preferred embodiment, the splicing mechanism is equipped with a limiting mechanism, which includes limiting holes. The first fixing ring is provided with multiple limiting holes. Each of the multiple precast barrels is equipped with a fixing sleeve. Each of the multiple fixing sleeves is slidably connected to a pressure rod by a compression spring. The top of the pressure rod extends to the outside of the first fixing ring, and a limiting rod is installed at the bottom of the pressure rod. The bottom of the limiting rod is flush with the outside of the second fixing ring.

[0015] As a preferred embodiment, a reinforcing mechanism is installed on the first fixing ring and the second fixing ring respectively. The reinforcing mechanism includes a connecting plate. Multiple connecting plates are welded to the inner sidewalls of the first fixing ring and the second fixing ring in a ring-shaped and equidistant arrangement. The connecting plate is provided with two connecting holes. A reinforcing rod is connected to the connecting plate through the connecting holes. The reinforcing rod is connected to the connecting plate through a nut. Multiple second fixing rings are connected to each other through the connecting plate and the reinforcing rod respectively. Multiple first fixing rings are connected to each other through the connecting plate and the reinforcing rod respectively.

[0016] This invention provides an installation method for a stepped variable diameter wind turbine tower structure, comprising the following steps: S1: First, install splicing mechanisms at both ends of multiple precast barrels. Then, fix the first precast barrel to the ground base and use lifting equipment to lift another precast barrel to the top of the first precast barrel for splicing. S2: After two precast barrels of different diameters are aligned and spliced, the precast barrels are rotated at a certain angle to make the locking mechanism and the connecting mechanism stable, so that the precast barrels will not loosen or fall off. S3: After the two precast barrels are stably spliced ​​together, the other precast barrel is installed. At this time, the precast barrel will drive the limiting mechanism to limit the two precast barrels at the bottom, so that the precast barrel cannot rotate and fall off. S4: Simultaneously, during the rotation and locking process of the precast barrel, the splicing mechanism drives the sealing mechanism to seal between the two precast barrels. This process is repeated to achieve the stacking and splicing of multiple precast barrels. Finally, after the splicing is completed, a detachable reinforcement mechanism is connected between the multiple stacked precast barrels to ensure that the multiple precast barrels are firmly connected and will not loosen.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The wind turbine tower structure and its installation method described in this invention achieve the assembly of the wind turbine tower by stacking and splicing multiple prefabricated barrels, and achieve the firm and stable splicing of the prefabricated barrels by cooperating the splicing mechanism and the locking mechanism.

[0018] (2) The step-by-step variable diameter wind turbine tower structure and its installation method described in this invention, through the installation of the limiting mechanism, facilitates the limiting of the two prefabricated barrels that have been spliced ​​at the bottom during splicing, so that the prefabricated barrels cannot rotate and fall off.

[0019] (3) The step-by-step variable diameter wind turbine tower structure and its installation method described in this invention, through the installation of the sealing mechanism, facilitates the operation of the sealing mechanism after the prefabricated barrels are spliced, so that the sealing mechanism seals between the two prefabricated barrels and prevents rainwater from entering.

[0020] (4) The progressively variable diameter wind turbine tower structure and its installation method described in this invention, through the installation of the reinforcement mechanism, facilitates the reinforcement between multiple stacked prefabricated barrels, so that the multiple prefabricated barrels are firmly connected and will not loosen. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the connection structure between the first fixing ring, the second fixing ring, and the precast barrel of the present invention; Figure 3 This is a schematic diagram of the connection structure between the first fixing ring and the second fixing ring of the present invention; Figure 4 This is a schematic diagram of the connection structure between the sealing ring, the airbag, and the second fixing ring of the present invention; Figure 5 This is a schematic diagram of the connection structure between the positioning block and the second fixing ring of the present invention; Figure 6 This is a schematic diagram of the connection structure between the sealing ring and the airbag of the present invention; Figure 7 This is a schematic diagram of the connection structure between the positioning block, the second fixing ring, and the fixing rod of the present invention; Figure 8 This is a schematic diagram of the connection structure between the pressure rod and the fixing sleeve of the present invention; Figure 9 This is a schematic diagram of the connection structure between the limiting rod and the fixing sleeve of the present invention.

[0023] The diagram shows: 1. Precast bucket; 2. Splicing mechanism; 201. First fixing ring; 202. Second fixing ring; 203. Slot; 204. Fixing rod; 205. Positioning block; 3. Locking mechanism; 301. Slot; 302. Telescopic spring; 4. Limiting mechanism; 401. Limiting hole; 402. Fixing sleeve; 403. Pressure rod; 404. Limiting rod; 405. Compression spring; 5. Reinforcing mechanism; 501. Nut; 502. Reinforcing rod; 503. Connecting plate; 504. Connecting hole; 6. Sealing mechanism; 601. Sealing ring; 602. Connecting pipe; 603. Airbag; 604. Top rod; 605. Pressure plate. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown in the figure, this embodiment of the invention provides a stepped variable diameter wind turbine tower structure, specifically including a prefabricated barrel 1. A splicing mechanism 2 is installed between multiple stacked prefabricated barrels 1. A locking mechanism 3 is installed on the splicing mechanism 2, and a limiting mechanism 4 and a sealing mechanism 6 are also installed on the splicing mechanism 2. Below, we will provide a detailed technical description of the specific structure and function of the splicing mechanism 2, locking mechanism 3, limiting mechanism 4, reinforcing mechanism 5, and sealing mechanism 6 in this embodiment.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the splicing mechanism 2 specifically includes a first fixing ring 201. The first fixing ring 201 is installed on the top of the precast barrel 1, and a second fixing ring 202 is installed on the bottom of the precast barrel 1. The top of the first fixing ring 201 is vertically connected to a plurality of positioning blocks 205 distributed in a ring at equal intervals. The bottom of the second fixing ring 202 is provided with a plurality of slots 203 distributed in a ring at equal intervals. By installing the first fixing ring 201 and the second fixing ring 202 on the top and bottom of the plurality of precast barrels 1 respectively, the first fixing ring 201 and the second fixing ring 202 can be connected when the plurality of precast barrels 1 are stacked and spliced, so that the precast barrels 1 will not be worn. At the same time, the multiple positioning blocks 205 on the first fixing ring 201 and the slots 203 on the second fixing ring 202 are connected to achieve the positioning function between the first fixing ring 201 and the second fixing ring 202, so that the connection between the two precast barrels 1 is stable.

[0027] like Figure 1 and Figure 2 As shown, multiple precast barrels 1 are stacked and connected in a progressively variable diameter manner. Each precast barrel 1 is a hollow frustum-shaped structure. The diameter of the first fixing ring 201 is equal to the diameter of the second fixing ring 202 spliced ​​at the top. This facilitates the stacking and splicing of multiple precast barrels 1 into a conical structure, making the stacking and splicing of multiple precast barrels 1 stable, increasing the bottom bearing capacity, satisfying the bottom resistance to gravity and bending moment, and reducing the top windward area.

[0028] like Figure 4 , Figure 5 and Figure 7 As shown, multiple fixed rods 204 arranged in a ring are vertically connected to the first fixed ring 201 and the second fixed ring 202 respectively. The first fixed ring 201 and the second fixed ring 202 are fixedly connected to both ends of the precast barrel 1 through the multiple fixed rods 204. The vertical installation of the multiple fixed rods 204 with the first fixed ring 201 and the second fixed ring 202 ensures that the first fixed ring 201 and the second fixed ring 202 are firmly and stably connected to the precast barrel 1.

[0029] like Figure 4 , Figure 5 and Figure 7 As shown, the locking mechanism 3 includes a slot 301. The bottom of the second fixing ring 202 has multiple slots 301 arranged in a ring. The slots 301 are arc-shaped with a "T"-shaped cross-section. One end of the slot 301 connects to the slot 203. The diameter of the slot 203 is equal to the inner width of the slot 301. The positioning block 205 is a cylindrical "T"-shaped structure. The top diameter of the positioning block 205 is smaller than the diameter of the slot 203, and the bottom diameter of the positioning block 205 is smaller than the outer width of the slot 301. Multiple positioning blocks 205 are slidably connected to the inside of the slots 301. The connection between the slots 301 and the slots 203 facilitates the positioning of the blocks. After 205 is inserted into the slot 301, the precast barrel 1 is rotated at a certain angle, so that the second fixing ring 202 slides with the positioning block 205 in cooperation with the slot 301, so that the positioning block 205 moves to the end of the slot 301. Since the positioning block 205 and the slot 301 are both "T" shaped structures, the positioning block 205 cannot be separated after it is engaged with the inside of the slot 301, so that the precast barrel 1 is stably connected and will not be separated. When disassembling, the precast barrel 1 is rotated in the opposite direction so that the slot 203 at the other end of the slot 301 is aligned with the positioning block 205. Since the diameter of the slot 203 is larger than the top diameter of the positioning block 205, it is convenient to lift and disassemble the precast barrel 1.

[0030] like Figure 7As shown, the bottom of the positioning block 205 extends into the second fixing ring 202 and the fixing rod 204. The bottom of the positioning block 205 slides elastically with the inside of the fixing rod 204 through the telescopic spring 302. The positioning block 205 has a cylindrical "I"-shaped structure. The installation of the telescopic spring 302 facilitates the elastic sliding of the bottom of the positioning block 205 with the inside of the fixing rod 204. When the positioning block 205 is engaged with the inside of the slot 301, the positioning block 205 will always remain in contact with the inside of the slot 301 with the cooperation of the telescopic spring 302, so that the positioning block 205 tightens the second fixing ring 202, ensuring the stability of the precast barrel 1 after stacking and splicing.

[0031] like Figure 4 As shown, the sealing mechanism 6 includes a sealing ring 601. The sealing ring 601 is engaged with the outer bottom of the second fixing ring 202. The sealing ring 601 is a hollow annular structure. The outer side of the sealing ring 601 abuts against another first fixing ring 201. By installing the sealing ring 601, after the first fixing ring 201 and the second fixing ring 202 are in contact, the sealing ring 601 seals the gap between the first fixing ring 201 and the second fixing ring 202, preventing subsequent rainwater from entering and causing corrosion.

[0032] like Figure 4 and Figure 6 As shown, multiple airbags 603 arranged in a ring at equal intervals are installed inside the second fixing ring 202. One end of each airbag 603 is slidably connected to the inside of the second fixing ring 202. A pressure plate 605 is provided at one end of each airbag 603. A push rod 604 is installed at the center of one side of the pressure plate 605. One end of the push rod 604 extends into the slot 301. The push rod 604, the pressure plate 605, and the second fixing ring 202 are slidably connected. The airbags 603 and the sealing ring 601 are connected by a connecting pipe 602. The installation facilitates gas storage. Through the installation of the pressure plate 605 and the top rod 604, when the precast barrel 1 is assembled and rotated to lock, the positioning block 205 moves to the end of the slot 301. The positioning block 205 abuts against the top rod 604, causing the top rod 604 to drive the pressure plate 605 to squeeze the airbag 603. The gas inside the airbag 603 enters the sealing ring 601 through the connecting pipe 602. The sealing ring 601 expands and fits tightly with the first fixing ring 201 and the second fixing ring 202, thereby increasing the sealing effect.

[0033] like Figure 5 , Figure 8 and Figure 9As shown, limiting mechanisms 4 are respectively installed on the first fixing ring 201 and the second fixing ring 202. The limiting mechanism 4 includes limiting holes 401. The first fixing ring 201 has multiple limiting holes 401. A fixing sleeve 402 is installed inside each of the multiple precast barrels 1. A pressure rod 403 is slidably connected inside the multiple fixing sleeves 402 through a compression spring 405. The top of the pressure rod 403 extends to the outside of the first fixing ring 201, and a limiting rod 404 is installed at the bottom of the pressure rod 403. The bottom of the limiting rod 404 is flush with the outside of the second fixing ring 202. The installation of multiple fixing sleeves 402 facilitates the installation of the pressure rod 403 and the limiting rod 404. With the cooperation of the compression spring 405, the pressure rod 403 and the limiting rod 404 elastically slide inside the fixing sleeves 402. Since the top of the pressure rod 403 extends to the outside of the first fixing ring 201, and the bottom of the limiting rod 404 is flush with the bottom of the second fixing ring 202, after multiple precast barrels 1 are stacked and locked, the limiting rod 404 can move to the top of the limiting hole 401. When the top precast barrel 1 is installed, the second fixing ring 202 will abut against the pressure rod 403. At this time, the pressure rod 403 gets rid of the elastic force of the compression spring 405 and squeezes the limiting rod 404. The limiting rod 404 will be inserted into the limiting hole 401, so that the first fixing ring 201 and the second fixing ring 202 are limited and cannot rotate. Thus, the two spliced ​​precast barrels 1 are firmly connected and will not rotate or loosen. Similarly, each time a precast barrel 1 is installed, the two bottom precast barrels 1 will be limited, so that the precast barrel 1 cannot rotate.

[0034] like Figure 2 and Figure 5 As shown, the reinforcement mechanism 5 includes a connecting plate 503. Multiple connecting plates 503 arranged in annular equidistant distribution are welded to the inner walls of the first fixing ring 201 and the second fixing ring 202. Each connecting plate 503 has two connecting holes 504. A reinforcing rod 502 is connected to the connecting plate 503 through the connecting holes 504. The reinforcing rod 502 is connected to the connecting plate 503 through a nut 501. Multiple second fixing rings 202 are interconnected via the connecting plate 503 and the reinforcing rod 502. Multiple first fixing rings 201 are interconnected via the connecting plate 503 and the reinforcing rod 502. Through the installation of the connecting plate 503, and with the cooperation of the reinforcing rod 502 and the nut 501, the first fixing rings 201 and multiple second fixing rings 202 on multiple precast barrels 1 can be interconnected via the reinforcing rod 502. This makes the multiple precast barrels 1 more firmly stacked and less prone to loosening, thus providing a safety protection function.

[0035] This invention also provides an installation method for a stepped variable diameter wind turbine tower structure, comprising the following steps: S1: First, install splicing mechanism 2 at both ends of multiple precast barrels 1 respectively. Then, fix the first precast barrel 1 to the ground base. Then, use lifting equipment to lift another precast barrel 1 to the top of the first precast barrel 1 for splicing. S2: When two precast barrels 1 of different diameters are aligned and spliced, and then another precast barrel 1 is installed, the precast barrel 1 will drive the limiting mechanism 4 to limit the two precast barrels at the bottom, and the precast barrel 1 will not loosen or fall off. S3: After the two precast barrels 1 are stably spliced ​​together, the other one is installed through the limiting mechanism 4, which helps to limit the two precast barrels 1 that have been spliced ​​at the bottom during splicing, so that the precast barrel 1 cannot rotate and fall off. S4: Simultaneously, during the rotation and locking process of the precast barrel 1, the splicing mechanism 2 drives the sealing mechanism 6, so that the sealing mechanism 6 seals between the two precast barrels 1. This process is repeated to achieve the stacked splicing and installation of multiple precast barrels 1. Finally, after the splicing is completed, the reinforcing mechanism 5 is detachably connected between the multiple stacked precast barrels 1 to ensure that the multiple precast barrels 1 are firmly connected and will not loosen.

[0036] In use, this invention firstly installs a first fixing ring 201 and a second fixing ring 202 on the top and bottom of multiple prefabricated barrels 1, respectively. This allows the first fixing ring 201 and the second fixing ring 202 to align when the multiple prefabricated barrels 1 are stacked and spliced, preventing wear between the prefabricated barrels 1. Simultaneously, multiple positioning blocks 205 on the first fixing ring 201 align with slots 203 on the second fixing ring 202, providing positioning between the first fixing ring 201 and the second fixing ring 202. This ensures a stable connection between two prefabricated barrels 1, facilitating the stacking and splicing of multiple prefabricated barrels 1 into a conical structure. This stable stacking and splicing increases the bottom load-bearing capacity, meeting the requirements for bottom resistance to gravity and bending moment while reducing the top windward area. The vertical installation of the fixing rod 204 with the first fixing ring 201 and the second fixing ring 202 ensures a firm and stable connection between the first fixing ring 201, the second fixing ring 202 and the precast bucket 1. The connection between the slot 301 and the slot 203 facilitates the insertion of the positioning block 205 into the slot 301. By rotating the precast bucket 1 at a certain angle, the second fixing ring 202 slides against the positioning block 205 in cooperation with the slot 301, allowing the positioning block 205 to move to the end of the slot 301. Since both the positioning block 205 and the slot 301 are "T"-shaped structures, the positioning block 205 cannot disengage after engaging with the inside of the slot 301, ensuring a stable connection and preventing separation of the precast bucket 1. During disassembly, by rotating the precast bucket 1 in the reverse direction, the slot 203 at the other end of the slot 301 engages with... The positioning blocks 205 are aligned. Since the diameter of the slot 203 is larger than the top diameter of the positioning block 205, it is convenient to lift and disassemble the precast barrel 1. The installation of the telescopic spring 302 facilitates the elastic sliding between the bottom of the positioning block 205 and the inside of the fixing rod 204. When the positioning block 205 is engaged with the inside of the slot 301, the positioning block 205 will always remain in contact with the inside of the slot 301 with the cooperation of the telescopic spring 302, so that the positioning block 205 tightens the second fixing ring 202, ensuring the stability of the precast barrel 1 after stacking and splicing. The installation of multiple fixing sleeves 402 facilitates the installation of the pressure rod 403 and the limiting rod 404. With the cooperation of the compression spring 405, the pressure rod 403 and the limiting rod 404 elastically slide with the inside of the fixing sleeve 402. Extending to the outside of the first fixing ring 201, the bottom of the limiting rod 404 is flush with the bottom of the second fixing ring 202. After multiple precast barrels 1 are stacked and locked, the limiting rod 404 can move to the top of the limiting hole 401. When the top precast barrel 1 is installed, the second fixing ring 202 will abut against the pressure rod 403. At this time, the pressure rod 403 is freed from the elastic force of the compression spring 405 and squeezes the limiting rod 404. The limiting rod 404 will insert into the limiting hole 401, so that the first fixing ring 201 and the second fixing ring 202 are limited and cannot rotate, thus making the two spliced ​​precast barrels 1 firmly connected and not rotating or loosening. Similarly, each time a precast barrel 1 is installed, it will limit the two bottom precast barrels 1, so that the precast barrel 1 cannot rotate. Through the installation of the sealing ring 601,After the first fixing ring 201 and the second fixing ring 202 are fitted together, the sealing ring 601 seals the gap between the first fixing ring 201 and the second fixing ring 202, preventing subsequent rainwater from entering and causing corrosion. The installation of the airbag 603 facilitates gas storage. Through the installation of the pressure plate 605 and the top rod 604, when the precast barrel 1 is assembled and rotated for locking, the positioning block 205 moves to the end of the slot 301, and the positioning block 205 abuts against the top rod 604, causing the top rod 604 to drive the pressure plate 605 to compress the airbag 603. The gas inside the 03 unit enters the sealing ring 601 through the connecting pipe 602. The sealing ring 601 expands and fits tightly against the first fixing ring 201 and the second fixing ring 202, increasing the sealing effect. Through the installation of the connecting plate 503, and with the cooperation of the reinforcing rod 502 and the nut 501, the first fixing rings 201 and the multiple second fixing rings 202 on the multiple precast barrels 1 can be interconnected via the reinforcing rod 502. This makes the stacked assembly of multiple precast barrels 1 more robust and less prone to loosening, thus providing a safety protection function.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepped variable diameter wind turbine tower structure, comprising a prefabricated barrel (1), characterized in that: A splicing mechanism (2) is installed between multiple stacked prefabricated barrels (1), and a locking mechanism (3) is installed on the splicing mechanism (2). The splicing mechanism (2) includes a first fixing ring (201), the top of the precast barrel (1) is equipped with the first fixing ring (201), the bottom of the precast barrel (1) is equipped with a second fixing ring (202), the top of the first fixing ring (201) is vertically connected with a plurality of positioning blocks (205) distributed in a ring at equal intervals, and the bottom of the second fixing ring (202) is provided with a plurality of slots (203) distributed in a ring at equal intervals. The locking mechanism (3) includes a slot (301). The bottom of the second fixing ring (202) is provided with a plurality of slots (301) arranged in a ring. One end of the slot (301) is connected to the slot (203). A plurality of positioning blocks (205) are slidably connected to the inside of the slot (301).

2. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: The slot (301) has an arc-shaped structure. The diameter of the slot (203) is equal to the inner width of the slot (301). The top diameter of the positioning block (205) is smaller than the diameter of the slot (203), and the bottom diameter of the positioning block (205) is smaller than the outer width of the slot (301).

3. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: Multiple prefabricated barrels (1) are stacked and connected in a step-by-step variable diameter manner. The prefabricated barrel (1) is a hollow frustum-shaped structure. The diameter of the first fixing ring (201) is equal to the diameter of the second fixing ring (202) spliced ​​at the top.

4. The staged variable diameter wind turbine tower structure according to claim 1, characterized in that: The first fixing ring (201) and the second fixing ring (202) are respectively vertically connected to a plurality of fixing rods (204) arranged in a ring. The first fixing ring (201) and the second fixing ring (202) are respectively fixedly connected to both ends of the precast bucket (1) through the plurality of fixing rods (204).

5. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: The bottom of the positioning block (205) extends into the second fixing ring (202) and the fixing rod (204). The bottom of the positioning block (205) slides elastically with the inside of the fixing rod (204) through the telescopic spring (302). The positioning block (205) is a cylindrical "I" shaped structure.

6. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: A sealing mechanism (6) is installed on the splicing mechanism (2). The sealing mechanism (6) includes a sealing ring (601). The sealing ring (601) is engaged with the bottom outer side of the second fixing ring (202). The sealing ring (601) is a hollow annular structure. The outer side of the sealing ring (601) abuts against another first fixing ring (201).

7. The progressively variable diameter wind turbine tower structure according to claim 6, characterized in that: The second fixing ring (202) is equipped with a plurality of airbags (603) arranged in a ring at equal intervals. One end of the airbag (603) is slidably connected to the inside of the second fixing ring (202). One end of the airbag (603) is provided with a pressure plate (605). A push rod (604) is installed at the center of one side of the pressure plate (605). One end of the push rod (604) extends into the slot (301). The push rod (604), the pressure plate (605) and the second fixing ring (202) are slidably connected. The airbag (603) and the sealing ring (601) are connected by a connecting pipe (602).

8. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: The splicing mechanism (2) is equipped with a limiting mechanism (4), which includes a limiting hole (401). The first fixing ring (201) is provided with multiple limiting holes (401). Multiple precast barrels (1) are respectively equipped with fixing sleeves (402). Multiple fixing sleeves (402) are slidably connected to pressure rods (403) through compression springs (405). The top of the pressure rod (403) extends to the outside of the first fixing ring (201). The bottom of the pressure rod (403) is equipped with a limiting rod (404). The bottom of the limiting rod (404) is flush with the outside of the second fixing ring (202).

9. The progressively variable diameter wind turbine tower structure according to claim 1, characterized in that: The first fixing ring (201) and the second fixing ring (202) are respectively equipped with a reinforcing mechanism (5). The reinforcing mechanism (5) includes a connecting plate (503). The inner sidewalls of the first fixing ring (201) and the second fixing ring (202) are respectively welded with a plurality of connecting plates (503) distributed in a ring at equal intervals. The connecting plate (503) is provided with two connecting holes (504). The connecting plate (503) is connected to a reinforcing rod (502) through the connecting holes (504). The reinforcing rod (502) is connected to the connecting plate (503) through a nut (501). The plurality of second fixing rings (202) are connected to each other through the connecting plate (503) and the reinforcing rod (502). The plurality of first fixing rings (201) are connected to each other through the connecting plate (503) and the reinforcing rod (502).

10. The installation method of the progressively variable diameter wind turbine tower structure according to any one of claims 1-9, characterized in that: Includes the following steps: S1: First, install splicing mechanisms (2) at both ends of multiple precast barrels (1), then fix the first precast barrel (1) to the ground base, and then use a lifting device to lift another precast barrel (1) to the top of the first precast barrel (1) for splicing; S2: After two precast barrels (1) of different diameters are aligned and spliced, the precast barrel (1) is rotated at a certain angle to make the locking mechanism (3) and the connecting mechanism stable, so that the precast barrel (1) will not loosen or fall off. S3: After the two precast buckets (1) are spliced ​​and stabilized, another precast bucket (1) is installed. At this time, the precast bucket (1) will drive the limiting mechanism (4) to limit the two precast buckets at the bottom, so that the precast bucket (1) cannot rotate and fall off. S4: During the rotation and locking process of the precast bucket (1), the splicing mechanism (2) drives the sealing mechanism (6) to seal the two precast buckets (1) together. This process is repeated to achieve the stacking and splicing of multiple precast buckets (1). Finally, after the splicing is completed, a detachable reinforcement mechanism (5) is connected between the multiple stacked precast buckets (1) to ensure that the multiple precast buckets (1) are firmly connected and will not loosen.

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