Prestress connecting structure of wind power generation tower drum and foundation

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind power generation tower drum and foundation prestress connecting structure which comprises a concrete base and a foundation ring embedded in the concrete base, and a generator tower drum is connected to the upper portion of the foundation ring through a flange and a fastener; wherein a framework unit is arranged in the concrete base, and a connecting piece connected with the framework unit is welded to the outer side of the foundation ring; by adopting the design of the framework unit, the interior of the concrete base is supported, meanwhile, the foundation ring is fixed to the framework unit through the multiple connecting pieces, so that the connecting stability of the foundation ring is ensured, and in addition, the reinforcing assembly is further designed, so that the reinforcing effect is improved. The stress unit can be used for enhancing the connecting strength of the foundation ring in the concrete base, so that the supporting stability of the foundation ring on a generator tower drum is enhanced, and the stress unit is used for forming a deformable space in the concrete base.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a prestressed connection structure between a wind power generation tower and a foundation. Background Art

[0002] With the continuous development of renewable energy technology, wind power generation has been widely used around the world as a clean and renewable energy form. The wind power tower is the core supporting structure of the wind turbine, which bears the weight of the entire unit and various loads generated during operation. In the structural design of the wind tower, the connection between the tower and the foundation plays a vital role, and its reliability is directly related to the safe and stable operation of the entire wind turbine.

[0003] At present, a commonly used foundation form in the wind power market is the buried wind turbine tower foundation. This foundation is simple in design and easy to construct, so it has a high utilization rate in practical applications. However, in actual operation, wind turbines will produce large vibrations due to the influence of wind force and their own rotation. These vibrations will form fatigue loads under long-term action, affecting the connection between the tower and the foundation.

[0004] Under the long-term action of fatigue load, the bond strength between the tower and the concrete foundation will gradually weaken, resulting in a decrease in the bonding performance between the two. As the bond strength weakens, the tower wall and the foundation concrete may become detached and form cracks. These cracks will not only directly affect the stability of the wind turbine, causing the wind turbine to swing more, but in severe cases may even cause safety accidents, threatening the safe operation of the entire wind farm.

[0005] Therefore, in order to improve the connection stability between the foundation ring and the concrete foundation and reduce the occurrence of cracks, we propose a prestressed connection structure between the wind turbine tower and the foundation. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art that the bond strength between the tower and the concrete foundation will gradually weaken, resulting in a decrease in the bonding performance between the two, and to propose a prestressed connection structure between the wind power tower and the foundation.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] Design a prestressed connection structure between a wind power tower and a foundation, comprising a concrete base and a foundation ring embedded in the concrete base, wherein a generator tower is connected above the foundation ring through a flange and fasteners;

[0009] A skeleton unit is arranged inside the concrete base, and a connecting piece connected to the skeleton unit is welded on the outside of the foundation ring;

[0010] A stress unit is also embedded in the concrete base, and the stress unit is sleeved on the outside of the foundation ring.

[0011] Furthermore, the skeleton unit includes four steel rings one distributed in a matrix, and a plurality of stirrups are arranged in spaced rings outside the four steel rings one, and the stirrups are connected and fixed to the steel ring one.

[0012] Furthermore, a plurality of the connecting pieces are welded along the outer circumference of the base ring, the connecting piece is in a bent structure, and a bent section at the bottom is connected and fixed to the steel ring.

[0013] Furthermore, a reinforcement component is connected to the inner side of the plurality of connecting members, and the reinforcement component is located below the middle portion of the base ring.

[0014] Furthermore, the reinforcing assembly includes a connecting ring, on which a plurality of fixing rods are scattered and rotatably connected, and the other ends of the fixing rods are fixedly connected to the connecting member.

[0015] Furthermore, the connecting ring and the base ring overlap in a circle.

[0016] Furthermore, the fixing rod is configured as threaded steel bar, and a plurality of through holes are spaced apart on the end surface of the fixing rod.

[0017] Furthermore, the stress unit comprises three steel rings 2 distributed in a triangular shape, and triangular stirrups are fixedly connected to the outer sides of the steel rings 2;

[0018] Wherein, filling pieces are arranged inside the three steel rings 2.

[0019] Furthermore, the filling piece is an elastic piece, and the filling piece has a ring-shaped structure.

[0020] Furthermore, the connecting piece is threaded steel bar.

[0021] The present invention proposes a prestressed connection structure between a wind power tower and a foundation, which has the following beneficial effects: the present invention adopts a skeleton unit design to support the inside of a concrete base, and at the same time, a foundation ring is fixed to the skeleton unit by a plurality of connectors to ensure the connection stability of the foundation ring. In addition, the present invention also has a reinforcing component, which can be used to enhance the connection strength of the foundation ring in the concrete base, thereby enhancing its support stability for the generator tower. The stress unit design is used to form a deformable space inside the concrete base, so that when the generator set is working, the local pressure around the concrete base is reduced through the design of the stress unit to avoid the risk of cracks in the concrete base. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the skeleton unit structure of the present invention;

[0025] Figure 4 It is a front view of the skeleton unit of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the reinforcement assembly of the present invention;

[0027] Figure 6 It is a schematic diagram of the stress unit structure of the present invention.

[0028] In the figure: 1. concrete base; 2. foundation ring; 3. generator tower; 4. skeleton unit; 41. steel ring one; 42. stirrups; 5. connector; 6. stress unit; 61. steel ring two; 62. triangular stirrups; 63. filling piece; 7. reinforcement component; 71. connecting ring; 72. fixing rod; 73. through hole. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-6 An embodiment of the present invention discloses a prestressed connection structure between a wind power tower and a foundation, the connection structure comprising a concrete base 1 and a foundation ring 2 embedded in the concrete base 1, and a generator tower 3 is connected above the foundation ring 2 through a flange and fasteners;

[0031] A skeleton unit 4 is arranged inside the concrete base 1, and a connector 5 connected to the skeleton unit 4 is welded on the outer side of the foundation ring 2. Preferably, the connector 5 in the embodiment of the present invention is a threaded steel bar. Of course, in order to enhance the connection strength with the concrete base 1, a plurality of through holes may be provided on the connector 5 in the present embodiment so that concrete can flow into the through holes during pouring, thereby enhancing the connection strength between the connector 5 and the concrete base 1, and thus ensuring the connection stability to the foundation ring 2;

[0032] A stress unit 6 is embedded in the concrete foundation 1 , and the stress unit 6 is sleeved on the outside of the foundation ring 2 .

[0033] In some embodiments, the skeleton unit 4 in the present invention includes four steel rings 41 distributed in a matrix, and a plurality of stirrups 42 are arranged on the outer side of the four steel rings 41 at intervals, and the stirrups 42 are connected and fixed to the steel rings 41. Specifically, the stirrups 42 described in this embodiment are rectangular stirrups. Of course, those skilled in the art know that the stirrups 42 can be connected to the steel rings 41 by using wire tying.

[0034] On the basis of the above-mentioned embodiment, the connecting members 5 in the present invention are welded in plurality along the outer circumference of the base ring 2 , the connecting members 5 are in a bent structure, and the bottom bent section thereof is connected and fixed to the steel ring 41 .

[0035] That is, in the present invention, a plurality of connecting members 5 are connected to the skeleton unit 4 to achieve connection and fixation of the base ring 2. The connecting members 5 can also be connected to the skeleton unit 4 by means of wire tying.

[0036] During pouring, the skeleton unit 4 is first placed at a predetermined position, and then the connecting piece 5 is tied to determine the position of the foundation ring 2. After that, the concrete base 1 is formed by pouring concrete, and at the same time, the skeleton unit 4 and the foundation ring 2 are buried in the concrete to complete the position fixation of the foundation ring 2.

[0037] Furthermore, in this embodiment, a reinforcement component 7 is also connected to the inner side of the plurality of connecting members 5, and the reinforcement component 7 is located below the middle of the base ring 2. The reinforcement component 7 described in this embodiment is used to enhance the connection strength of the base ring 2 in the concrete base 1, thereby enhancing its supporting stability for the generator tower 3.

[0038] In some embodiments, the reinforcement assembly 7 in the present invention includes a connecting ring 71, on which a plurality of fixing rods 72 are scattered and rotatably connected. In this embodiment, the end of the fixing rod 72 has a through hole, and the connecting ring 71 is rotatably connected in the through hole. By adopting the through hole rotation connection method, a plurality of fixing rods 72 can be integrated into one connecting ring 71, thereby improving the convenient transportation and storage of the entire reinforcement assembly 7, wherein the other end of the fixing rod 72 is fixedly connected to the connecting member 5.

[0039] It should be noted that the connecting ring 71 and the base ring 2 are circularly overlapped. Preferably, in this embodiment, the plurality of fixing rods 72 together form a conical structure after being fixed, and the tip of the cone of the conical structure faces the bottom of the concrete base 1. Since the conical structure is formed in the concrete base 1, when the concrete base 1 is cast, the conical structure will form a larger force-bearing area on the upper and lower sides of the base ring 2, thereby greatly improving the connection stability of the base ring 2, and then achieving the support stability of the generator tower 3.

[0040] In a preferred embodiment, the fixing rod 72 of the present invention is configured as threaded steel. The design of threaded steel can enhance the friction with the concrete base 1. In addition, a plurality of through holes 73 are provided at intervals on the end surface of the fixing rod 72 of the present invention. The design of through holes 73 allows part of the concrete to flow into the inside of the through holes 73 during the concrete pouring process. This can increase the connection area between the fixing rod 72 and the concrete base 1, thereby ensuring that the upper and lower force bearing capacity of the base ring 2 is enhanced.

[0041] In some embodiments, the stress unit 6 of the present invention includes three steel rings 61 distributed in a triangle, and a triangular stirrup 62 is fixedly connected to the outer side of the steel ring 61;

[0042] The three steel rings 61 are internally provided with fillers 63. Specifically, in the present invention, the fillers 63 are designed to fill the internal spaces of the three steel rings 61. The purpose of adopting this design is to form a deformable space inside the concrete base 1. In this way, when the generator set is working, the local pressure around the concrete base 1 is reduced through the design of the stress unit 6 to avoid the risk of cracks in the concrete base 1.

[0043] Specifically, the filling member 63 in the embodiment of the present invention is an elastic member, and the filling member 63 is an annular structure. Preferably, the elastic member in this embodiment is a hollow foam or silicone ring, so that during the pouring of concrete, the concrete can be blocked from entering the interior of the three steel rings 61, and at the same time, a deformation space can be formed after the pouring is completed.

[0044] In summary, the present invention adopts the design of a skeleton unit 4 to support the interior of the concrete base 1, and the foundation ring 2 is fixed to the skeleton unit 4 by multiple connectors 5 to ensure the connection stability of the foundation ring 2. In addition, the present invention also has a reinforcement component 7, which can be used to enhance the connection strength of the foundation ring 2 in the concrete base 1, so as to enhance its support stability for the generator tower 3. The design of the stress unit 6 is used to form a deformable space inside the concrete base 1. When the generator set is working, the local pressure around the concrete base 1 is reduced through the design of the stress unit 6 to avoid the risk of cracks in the concrete base 1.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prestressed connection structure between a wind power tower and a foundation, comprising a concrete base (1) and a foundation ring (2) embedded in the concrete base (1), characterized in that: A generator tower (3) is connected above the base ring (2) via a flange and fasteners; A skeleton unit (4) is arranged inside the concrete base (1), and a connecting piece (5) connected to the skeleton unit (4) is welded on the outside of the base ring (2); A stress unit (6) is also embedded inside the concrete base (1), and the stress unit (6) is sleeved on the outside of the foundation ring (2).

2. The prestressed connection structure between a wind power tower and a foundation according to claim 1, characterized in that: The skeleton unit (4) comprises four steel rings (41) distributed in a matrix, and a plurality of stirrups (42) are arranged in spacer rings outside the four steel rings (41), and the stirrups (42) are connected and fixed to the steel rings (41).

3. The prestressed connection structure between a wind power tower and a foundation according to claim 2, characterized in that: A plurality of the connecting pieces (5) are welded along the outer circumference of the base ring (2); the connecting piece (5) is a bent structure, and the bent section at the bottom is connected and fixed to the steel ring (41).

4. The prestressed connection structure between a wind power tower and a foundation according to claim 1, characterized in that: A reinforcement component (7) is also connected to the inner side of the plurality of connecting members (5), and the reinforcement component (7) is located below the middle of the base ring (2).

5. The prestressed connection structure between a wind power tower and a foundation according to claim 5, characterized in that: The reinforcing assembly (7) comprises a connecting ring (71), on which a plurality of fixing rods (72) are scattered and rotatably connected, and the other ends of the fixing rods (72) are fixedly connected to the connecting member (5).

6. The prestressed connection structure between a wind power tower and a foundation according to claim 5, characterized in that: The connecting ring (71) and the base ring (2) overlap in a circular shape.

7. The prestressed connection structure between a wind power tower and a foundation according to claim 5, characterized in that: The fixing rod (72) is configured as a threaded steel bar, and a plurality of through holes (73) are provided at intervals on the end surface of the fixing rod (72).

8. The prestressed connection structure between a wind power tower and a foundation according to claim 1, characterized in that: The stress unit (6) comprises three steel rings (61) distributed in a triangular shape, and a triangular stirrup (62) is fixedly connected to the outer side of the steel ring (61); Wherein, a filling piece (63) is arranged inside each of the three steel rings (61).

9. The prestressed connection structure between a wind power tower and a foundation according to claim 7, characterized in that: The filling piece (63) is an elastic piece, and the filling piece (63) is an annular structure.

10. The prestressed connection structure between a wind power tower and a foundation according to claim 1, characterized in that: The connecting piece (5) is threaded steel.

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