Large and small column wind power tower

Abstract

The utility model provides a wind power tower with large and small columns. The wind power tower comprises two large tower columns and two small tower columns, when the wind power tower is assembled, the two large tower columns and the two small tower columns are arranged in a diagonal mode. When the wind power tower is transported, the two small tower columns are nested in the two large tower columns, the wind power tower is of a big-end-down conical structure, the wind power tower further comprises tower beams connecting the large tower columns and the small tower columns and supporting rods connecting the adjacent tower beams, and the length of the tower beams is gradually reduced from the bottom of the tower to the top of the tower. According to the wind power tower with the large and small columns, due to the innovative diagonal arrangement and nested transportation design of the large and small tower columns, the problems that in the prior art, a wind power tower is large in transportation space and needs a plurality of transportation vehicles are solved, the stability of the whole structure is guaranteed through the reasonable structural design, and the transportation cost is reduced. Meanwhile, the problem that a traditional truss structure needs a large number of thin pipes for lap joint, and consequently installation is complex is solved, the transportation cost is effectively reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment, and in particular to a wind turbine tower with large and small columns. Background Technology

[0002] As a crucial component of clean energy, wind power generation relies heavily on the design and manufacture of its supporting structure—the wind turbine tower—which directly impacts the safety and economic viability of wind turbine generators. Currently, wind turbine towers primarily come in the following structural forms:

[0003] One type is the traditional truss structure, which is formed by splicing multiple thin tubes to form a structure with columns, crossbars and diagonal braces; the second type is a cylindrical or frustum structure made of steel or concrete, including tubes with a circular cross-section made of rolled steel material, or tower structures with a circular cross-section built of concrete; the third type is a cylindrical or frustum-shaped tower structure made of steel and concrete, that is, the lower part is made of concrete and the upper part is made of steel.

[0004] However, these existing technologies have the following problems:

[0005] Although truss structures have good stability, they require a large number of thin tubes to be connected, which not only makes them complex to manufacture and install, but also consumes a lot of steel and has high maintenance costs.

[0006] To ensure stability, single-tube steel structure towers require increased wall thickness, resulting in high steel consumption and costs. Furthermore, the transportation of existing tower structures often requires more space due to the steel frame structure, ultimately necessitating the use of multiple transport vehicles, which increases transportation costs and is not conducive to long-distance transportation.

[0007] Therefore, there is an urgent need to develop a new type of wind turbine tower structure that can ensure structural stability, reduce manufacturing costs, and facilitate transportation. Utility Model Content

[0008] The technical problem to be solved by this utility model is to solve the technical problems mentioned in the background art and provide a new type of wind power tower structure that can reduce manufacturing costs, save transportation space, and ensure structural stability.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] A wind turbine tower with two large columns and two small columns is provided. During assembly, the two large columns and two small columns are arranged diagonally. During transportation, the two small columns are nested within the two large columns.

[0011] Preferably, the wind turbine tower is a conical tower structure that is wider at the bottom and narrower at the top.

[0012] Preferably, the wind turbine tower also includes tower beams connecting the large tower column and the small tower column, as well as struts connecting adjacent tower beams.

[0013] Preferably, tower column holes for connecting tower beams are provided on the side walls of the large and small tower columns.

[0014] Preferably, both the large and small tower columns are segmented structures, with adjacent ends connected by flanges.

[0015] Preferably, the diameter of the large tower column is 2220mm, and the diameter of the small tower column is 1820mm.

[0016] Preferably, the length of the tower beam gradually decreases from the bottom of the tower to the top of the tower.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. By adopting a structural design with two large tower columns and two small tower columns arranged diagonally, and allowing the small tower columns to be nested within the large tower columns for transportation, the problem of large transportation space and the need for multiple transport vehicles for existing wind turbine towers is solved, while ensuring the overall stability of the wind turbine towers and significantly reducing transportation costs.

[0019] 2. By adopting a tapered tower structure design that is larger at the bottom and smaller at the top, combined with the connection and support of the tower beams and struts, a stable force-bearing system is formed, which effectively solves the problem that single-tube steel structures need to increase the wall thickness to ensure stability, reduces the amount of steel used, and lowers the manufacturing cost.

[0020] 3. The segmented structural design and flange connection method, combined with the setting of tower column holes, simplify the tower assembly process, avoid the problem of complicated installation caused by the need for a large number of thin pipes to be overlapped in traditional truss structures, and improve construction efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the large and small column wind turbine towers in Example 1;

[0022] Figure 2 This is a schematic diagram showing the connection state between the large tower column and the small tower column in Example 1;

[0023] Figure 3 for Figure 2 Enlarged view of point a in the middle;

[0024] Figure 4 This is a schematic diagram of a small tower column placed inside a large tower column during transport in Example 1.

[0025] Reference numerals in the attached diagram: 1. Wind turbine tower; 2. Large tower column; 3. Small tower column; 4. Tower beam; 5. Support rod; 6. Tower column hole; 7. Wind power generation device. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way. Example

[0027] like Figure 1-4 As shown, a wind turbine tower with large and small columns includes two large columns 2 and two small columns 3. Both the large columns 2 and the small columns 3 are made of steel. The entire wind turbine tower 1 has a conical structure that is larger at the bottom and smaller at the top. The length of the tower beam 4 gradually decreases from the bottom to the top of the tower.

[0028] In this embodiment, during the assembly of the wind turbine tower 1, two large tower columns 2 and two small tower columns 3 are arranged diagonally. Both the large tower columns 2 and the small tower columns 3 adopt a segmented structure. The adjacent upper and lower ends of each segment of the large tower column 2 and the small tower column 3 are connected by flanges, which are fastened with high-strength bolts to ensure reliable connection. The large tower column 2 has a diameter of 2220mm and a wall thickness of 28mm, while the small tower column 3 has a diameter of 1820mm and a wall thickness of 31mm. Both the large tower column 2 and the small tower column 3 are hollow structures. The hollow cavity of the large tower column 2 forms an effective nesting space, allowing the small tower columns 3 to be easily nested inside the large tower column 2. During transportation, the two small tower columns 3 can be nested within the two large tower columns 2. Specifically, the small tower columns 3 are first hoisted and slowly placed inside the large tower columns 2, utilizing the space created by the 400mm diameter difference between the large and small tower columns 3 to achieve complete nesting. This design significantly reduces transportation space, allowing a transportation task that originally required four vehicles to be completed to now be done with just two.

[0029] To enhance the overall structural stability, the wind turbine tower 1 in this embodiment also includes several tower beams 4 and struts 5. The tower beams 4 connect the large tower column 2 and the small tower column 3. Specifically, tower column holes 6 for connecting the tower beams 4 are pre-drilled on the side walls of the large tower column 2 and the small tower column 3, and the tower beams 4 are fixedly connected to the tower columns through these pre-drilled holes 6. Stirrups 5 are also fixedly installed between adjacent tower beams 4, forming a triangular stable structure with the struts 5 and the tower beams 4 at both ends, further improving the overall structural stability. In this embodiment, the diameter of the tower beams 4 is 820mm, and the diameter of the struts 5 is 219mm. The entire wind turbine tower 1 has a tapered structure that is wider at the bottom and narrower at the top. Therefore, the dimensions of the tower beams 4 gradually decrease from the bottom to the top of the wind turbine tower 1. The bottom tower beams 4 are longer, forming a larger supporting base and providing better anti-overturning capability, while the top tower beams 4 gradually shorten, reducing the top weight, lowering the overall center of gravity, and improving structural stability. Furthermore, the conical structure has good wind dynamic performance, which can reduce wind resistance. The gradual design of the tower beam length 4 makes the structure deform more evenly when subjected to wind load, thereby reducing the adverse effects of wind load on the structure.

[0030] The working principle and method of the large and small column wind turbine towers in this embodiment are as follows:

[0031] The first step, transportation preparation stage: First, the segmented small tower columns 3 are hoisted and inserted into the interior of the large tower column 2, utilizing the annular space formed by the 400mm diameter difference to achieve nesting. Care must be taken to ensure alignment during nesting to avoid scratching the anti-corrosion layer on the tower column surface. Multiple large tower columns 2 (containing small tower columns 3) are loaded onto transport vehicles for transportation.

[0032] The second step is the on-site installation phase: Construction personnel first mark the installation positions of the four tower columns on the wind farm foundation according to the design drawings, with a spacing of 31,000 mm between adjacent tower columns. Then, the large tower column 2 is hoisted into place and fixed to the foundation. Afterwards, the small tower column 3 is hoisted from the large tower column 2 and installed in the designated position. The large and small tower columns 3 are arranged diagonally to form a stable support structure.

[0033] The third step is the installation of the connecting structure: After the tower columns are installed, the construction workers begin installing the tower beams 4. The two ends of the tower beams 4 are aligned with the tower column holes 6 of the large tower column 2 and the small tower column 3, respectively, and secured with high-strength bolts. Then, the struts 5 are installed, connecting adjacent tower beams 4 to form an integrated support structure.

[0034] The fourth step is segmented connection: Repeating steps two and three, segmented connections for each tower column are achieved using flanges and high-strength bolts for splicing and fixing. Finally, the tower as a whole presents a tapered structure, wider at the bottom and narrower at the top, with the length of the tower columns gradually decreasing from bottom to top. The wind power generation device 7 is then installed on top of the wind turbine tower 1.

[0035] In this embodiment, the smaller tower column 3 can be nested inside the larger tower column 2, reducing the original four transport spaces to two, directly reducing the need for transport vehicles by 50%. The 400mm diameter difference between the larger and smaller tower columns 3 also provides sufficient nesting space, while avoiding mutual collisions during transportation. The diagonal arrangement of the larger and smaller tower columns 3 forms a stable four-point support structure, resulting in more even stress distribution. The tower columns of different diameters rationally distribute structural stress, with the larger tower column 2 bearing the main load and the smaller tower column 3 providing auxiliary support. Combined with the support system of the tower beam 4 and strut 5, it can effectively bear wind loads and equipment weight, ensuring the safety of the overall structure.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any innovative improvements or substitutions based on the present invention should fall within the scope of the claims of the present invention. Furthermore, the parameters, materials, and processes mentioned in the above embodiments are not unique. Without departing from the technical essence of the present invention, those skilled in the art can make various alternative choices, and these alternative solutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A wind turbine tower with varying column sizes, characterized in that, It includes two large tower columns and two small tower columns; during wind turbine tower assembly, the two large tower columns and two small tower columns are arranged diagonally; during wind turbine tower transportation, the two small tower columns are nested within the two large tower columns.

2. The large and small column wind turbine tower according to claim 1, characterized in that, The wind turbine tower is a conical tower structure that is wider at the bottom and narrower at the top.

3. The large and small column wind turbine tower according to claim 1, characterized in that, The wind turbine tower also includes tower beams connecting the large tower column and the small tower column, as well as struts connecting adjacent tower beams.

4. The large and small column wind turbine tower according to claim 3, characterized in that, The side walls of the large and small tower columns are provided with tower column holes for connecting the tower beams.

5. The large and small column wind turbine tower according to claim 1, characterized in that, Both the large and small tower columns are segmented structures, with adjacent ends connected by flanges.

6. The large and small column wind turbine tower according to claim 1, characterized in that, The large tower column has a diameter of 2220mm, and the small tower column has a diameter of 1820mm.

7. The large and small column wind turbine tower according to claim 3, characterized in that, The length of the tower beam gradually decreases from the bottom of the tower to the top of the tower.

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