A new type of steel-concrete composite section tower structure and zero-energy dissipation method

Abstract

The application discloses a novel steel-concrete combined section tower structure and a zero-energy consumption heat dissipation method, the tower structure is arranged with a circular arc steel plate on a windward tensile side, a steel pipe is mainly arranged on a leeward compression side, high-strength concrete is poured into the steel pipe to form a steel pipe concrete, and a thinner bent steel plate is used to enclose the steel pipe concrete on the compression side to play a role of enclosure and combination into a heat dissipation structure, a heat dissipation channel is formed through the bent steel plate on the leeward side with small stress and the steel pipe wall of the steel pipe concrete, and heat dissipation holes are staggered on the bent steel plate on the leeward side to absorb the internal heat by using Bernoulli's principle; compared with a traditional steel tower and a concrete tower, the tower structure fully utilizes the material properties of the materials of the sections, the circular arc steel plate on the windward side is mainly subjected to tension, the steel pipe concrete on the leeward side is mainly subjected to compression, the combined section is more economical and reasonable, and zero-energy consumption and self-adapting adjustment heat dissipation are realized.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine towers, and in particular to a novel steel-concrete composite section tower structure and a zero-energy heat dissipation method. Background Technology

[0002] As the main load-bearing structure in a wind turbine, the wind turbine tower supports the turbine to a certain height to obtain better wind conditions. Due to the heavy weight and long cantilever length of the wind turbine nacelle, the tower is a typical compression-bending component. Towers can be classified according to their structural form as: conical towers, truss towers, and combined towers with a bottom truss and top conical top; according to their structural material as: steel structure towers and concrete structure towers; and according to their natural frequency as: rigid towers and flexible towers.

[0003] Currently, there are two types of tower cross-section structures: 1. Cylindrical steel tower, whose cross-section is formed by rolling steel plates of equal thickness into an annular cross-section. The cross-section material is all steel. With the increasing capacity of the units, this type of tower can only prevent buckling failure of the cylindrical section under compression and bending by increasing the diameter or wall thickness. However, the tower diameter will be limited by transportation conditions, especially by the transportation height. Excessively large diameters cannot pass through tunnels, culverts, bridges, road signs, etc. along the way, which will greatly hinder its future application; 2. Concrete tower. In order to prevent concrete from cracking under tension, the only way to improve the load-bearing capacity is to increase the diameter and wall thickness. This will greatly increase the cost of molds and materials. Similarly, the transportation of concrete segments will also be restricted.

[0004] Furthermore, as the unit capacity continues to increase, the mechanical and electrical losses of transmission components and electrical equipment such as generators in the nacelle, and transformers and converters inside the tower, will increase. This leads to a rise in heat within the nacelle and tower. The traditional solution is to install dedicated radiators at the top of the nacelle and the bottom of the tower, using cooling water circulation to remove internal heat, and using fans on the external radiators to accelerate heat exchange between the water-cooled pipes and the external environment, preventing internal equipment from overheating and affecting its performance or even endangering its safe operation. This cooling method not only increases additional costs, but also generates significant noise during radiator operation, affecting the overall noise level of the unit and impacting the surrounding environment. Summary of the Invention

[0005] The primary objective of this invention is to overcome the shortcomings of existing technologies and to propose a novel steel-concrete composite section tower structure and its manufacturing method.

[0006] The second objective of this invention is to provide a zero-energy-consumption heat dissipation method for wind turbine towers.

[0007] The first objective of this invention is achieved through the following technical solution: a novel steel-concrete composite section tower structure, comprising a first tower section and a second tower section arranged sequentially from bottom to top; the first tower section and the second tower section are connected by an intermediate flange, the first tower section comprising a plurality of cylindrical sections connected sequentially by intermediate flanges, each cylindrical section comprising an arc plate, a bent plate, a connecting plate, and steel-concrete composite pipes, the two ends of the arc plate being connected to the two ends of the bent plate by the connecting plate to form a hollow cavity, the steel-concrete composite pipes penetrating into the hollow cavity and close to the bent plate, the outer side of the steel-concrete composite pipes being connected to the connecting plates on both sides, so that a heat dissipation channel is formed between the bent plate and the steel-concrete composite pipes.

[0008] Furthermore, the arc plate is an arc steel plate used as the windward side of the tower, and the thickness of the arc plate is greater than the thickness of the bent plate.

[0009] Furthermore, the bending plate is a bent steel plate used as the leeward side of the tower, and the bending plate has multiple heat dissipation holes.

[0010] Furthermore, the connecting plate is a connecting steel plate.

[0011] Furthermore, the second tower section is a conical tower section, the bottom end of the second tower section is connected to the top end of the first tower section through an intermediate flange, and the cross-section of the bottom end of the second tower section is the same as the cross-section of the top end of the first tower section. The area of ​​the cross-section of the top end of the second tower section is smaller than the area of ​​the cross-section of the bottom end of the second tower section.

[0012] A method for manufacturing the aforementioned novel steel-concrete composite section tower structure involves sequentially assembling a first tower section and a second tower section from bottom to top. The first and second tower sections are connected by an intermediate flange. The bottom of the first tower section is connected to the wind turbine foundation via a bottom flange, and the top of the second tower section is connected to the wind turbine main unit via a top flange. In the manufacturing of the first tower section, the arc plate is rolled by adjusting its initial angle, and the lengths at both ends of the bending plate are adjusted to ensure that the longitudinal welds between the sections are staggered in the vertical direction, preventing the formation of cross welds. Multiple staggered heat dissipation holes are also provided on the bending plate. The outer steel pipe of the steel-concrete composite section is welded to the connecting plate. After welding multiple sections together via intermediate flanges to form the first tower section, high-strength concrete is poured into the outer steel pipe, creating a steel-concrete composite section inside the first tower section. The two ends of the steel-concrete composite section are ground to maintain horizontality with the planes of the intermediate and bottom flanges, ensuring that no warping or gaps occur during connection.

[0013] The second objective of this invention is achieved through the following technical solution: a zero-energy heat dissipation method for wind turbine towers, characterized by the use of the aforementioned novel steel-concrete composite section tower structure. This method involves forming a heat dissipation channel connecting the tower bottom to the top between a bent plate on the leeward side of the tower and a steel-concrete composite section. The bent plate on the leeward side of the tower has staggered heat dissipation holes on its surface. Utilizing Bernoulli's principle, a negative pressure is created within this heat dissipation channel, absorbing the heat generated inside the tower due to mechanical and electrical losses. Simultaneously, the aforementioned heat dissipation holes are only opened on the first tower section, while no holes are opened on the second tower section, creating a chimney effect within the relatively narrow channel at the top to increase heat dissipation efficiency.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] 1. Compared with the traditional steel tower plus concrete tower, the new steel-concrete composite section tower structure of the present invention makes full use of the material properties of the section materials. The arc steel plate on the windward side is mainly under tension, and the steel pipe concrete on the leeward side is mainly under compression, making the composite section more economical and reasonable.

[0016] 2. The zero-energy heat dissipation method described in this invention forms a heat dissipation channel by bending a steel plate on the leeward side, where the force is relatively small, and connecting it to the steel pipe wall of the steel-concrete composite structure. Heat dissipation holes are staggered on the bent steel plate on the leeward side. Utilizing Bernoulli's principle, internal heat is absorbed. Furthermore, the heat generated inside the wind turbine due to mechanical and electrical losses increases with wind speed and rotor speed, leading to more heat generation. Simultaneously, higher wind speeds create greater internal negative pressure as the fluid flows through the small holes in the cylinder wall, further increasing heat dissipation efficiency. Therefore, the heat dissipation efficiency of this method is directly proportional to the internal heat generation, achieving zero-energy, self-adjusting heat dissipation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a new type of steel-concrete composite section tower structure.

[0018] Figure 2 This is a schematic diagram of the structure of the first tower section.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the cylindrical section.

[0020] Figure 4 This is a schematic diagram of the cylindrical section. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] Example 1

[0023] See Figures 1 to 4 As shown, this embodiment provides a novel steel-concrete composite section tower structure, including a first tower section 1 and a second tower section 2 arranged sequentially from bottom to top;

[0024] The first tower section 1 and the second tower section 2 are connected by an intermediate flange 4. The first tower section 1 includes multiple cylindrical sections connected sequentially by the intermediate flange 4. Each cylindrical section includes an arc plate 10, a bent plate 12, a connecting plate 11, and a steel-concrete composite pipe 6. The arc plate 10 is an arc-shaped steel plate used as the windward side 7 of the tower. The thickness of the arc plate 10 is greater than the thickness of the bent plate 12. The bent plate 12 is a bent steel plate used as the leeward side of the tower, and it has multiple heat dissipation holes 9. The connecting plate 11 is a connecting steel plate. The two ends of the arc plate 10 are connected to the two ends of the bent plate 12 through the connecting plate 11, forming a hollow cavity. The steel-concrete composite pipe 6 is inserted into the hollow cavity and is close to the bent plate 12. The outer side of the steel-concrete composite pipe 6 is connected to the connecting plates 11 on both sides, so that a heat dissipation channel is formed between the bent plate 12 and the steel-concrete composite pipe 6. The second tower section 2 is a conical tower section. The bottom end of the second tower section 2 is connected to the top end of the first tower section 1 through an intermediate flange. The cross-section of the bottom end of the second tower section 2 is the same as the cross-section of the top end of the first tower section 1. The area of ​​the cross-section of the top end of the second tower section 2 is smaller than the area of ​​the cross-section of the bottom end of the second tower section 2.

[0025] The manufacturing method of the aforementioned novel steel-concrete composite section tower structure involves sequentially assembling a first tower section 1 and a second tower section 2 from bottom to top. The first tower section 1 and the second tower section 2 are connected by an intermediate flange 4. The bottom of the first tower section 1 is connected to the wind turbine foundation via a bottom flange 3, and the top of the second tower section 2 is connected to the wind turbine main unit via a top flange 5. In the manufacturing of the first tower section 1, the arc plate 10 is rolled by adjusting its initial angle, and the lengths of both ends of the bending plate 12 are adjusted to achieve the desired section length. The longitudinal welds 8 are staggered in the vertical direction to prevent the formation of cross welds. At the same time, multiple staggered heat dissipation holes 9 are opened on the bending plate 12. The outer steel pipe of the steel-concrete composite 6 is welded to the connecting plate 11. After multiple cylinder sections are welded together through the intermediate flange 4 to form the first tower section 1, high-strength concrete is poured into the outer steel pipe to form the steel-concrete composite 6 inside the first tower section 1. The two ends of the steel-concrete composite 6 are ground to keep them level with the planes of the intermediate flange 4 and the bottom flange 3 to ensure that there will be no warping or gaps during connection.

[0026] Example 2

[0027] A zero-energy heat dissipation method for wind turbine towers utilizes the novel steel-concrete composite section tower structure described in Example 1. This method involves forming a heat dissipation channel 13 connecting the tower bottom to the top between a bent plate 12 on the leeward side of the tower and a steel-concrete composite section 6. The bent plate 12 on the leeward side of the tower has staggered heat dissipation holes 9. Utilizing Bernoulli's principle, a negative pressure is created within this heat dissipation channel 13, absorbing the heat generated inside the tower due to mechanical and electrical losses. Simultaneously, the aforementioned heat dissipation holes 9 are only opened on the first tower section 1, while no holes are opened on the second tower section 2, creating a chimney effect within the relatively narrow channel at the top to increase heat dissipation efficiency.

[0028] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A novel steel-concrete composite section tower structure, characterized in that: The tower comprises a first tower section and a second tower section, arranged sequentially from bottom to top. The first tower section and the second tower section are connected by an intermediate flange. The first tower section includes multiple cylindrical sections connected sequentially by the intermediate flange. Each cylindrical section includes an arc plate, a bent plate, a connecting plate, and a steel-concrete composite tube. The two ends of the arc plate are connected to the two ends of the bent plate by the connecting plate, forming a hollow cavity. The steel-concrete composite tube penetrates into the hollow cavity and is located near the bent plate. The outer side of the steel-concrete composite tube is connected to the connecting plates on both sides, forming a heat dissipation channel between the bent plate and the steel-concrete composite tube. The arc plate is an arc-shaped steel plate used as the windward side of the tower, and the thickness of the arc plate is greater than the thickness of the bent plate. The bent plate is a bent steel plate used as the leeward side of the tower, and multiple heat dissipation holes are opened on the bent plate.

2. The novel steel-concrete composite section tower structure according to claim 1, characterized in that: The connecting plate is a connecting steel plate.

3. The novel steel-concrete composite section tower structure according to claim 1, characterized in that: The second tower section is a conical tower section. The bottom end of the second tower section is connected to the top end of the first tower section through an intermediate flange. The cross-section of the bottom end of the second tower section is the same as the cross-section of the top end of the first tower section. The area of ​​the cross-section of the top end of the second tower section is smaller than the area of ​​the cross-section of the bottom end of the second tower section.

4. A method for manufacturing a novel steel-concrete composite section tower structure as described in any one of claims 1-3, characterized in that: The method involves sequentially assembling the first and second tower sections from bottom to top, connected by an intermediate flange. The bottom of the first tower section is connected to the wind turbine foundation via a bottom flange, and the top of the second tower section is connected to the wind turbine main unit via a top flange. In the manufacturing of the first tower section, the arc plate is rolled by adjusting its initial angle, and the lengths at both ends of the bending plate are adjusted to ensure that the longitudinal welds between the sections are staggered vertically, preventing the formation of cross welds. Multiple staggered heat dissipation holes are also provided on the bending plate. The outer steel pipe of the steel-concrete composite structure is welded to the connecting plate. After welding multiple sections together via the intermediate flange to form the first tower section, high-strength concrete is poured into the outer steel pipe, creating a steel-concrete composite structure inside the first tower section. The two ends of the steel-concrete composite structure are ground to maintain horizontality with the planes of the intermediate and bottom flanges, ensuring no warping or gaps occur during connection.

5. A zero-energy-consumption heat dissipation method for wind turbine towers, characterized in that, The novel steel-concrete composite section tower structure according to any one of claims 1-3 is used. The method involves forming a heat dissipation channel that runs vertically from the bottom to the top of the tower between the bent plate on the leeward side of the tower and the steel-concrete composite tube. The surface of the bent plate on the leeward side of the tower has staggered heat dissipation holes. Using Bernoulli's principle, a negative pressure is formed in the heat dissipation channel to absorb the heat generated inside the tower due to mechanical and electrical losses. At the same time, the aforementioned heat dissipation holes are only opened on the first tower section, and no holes are opened on the second tower section, so that a chimney effect is formed in the relatively narrow channel at the top to increase the heat dissipation efficiency.

Images