Splicing cavity steel-concrete fan tower drum and steel tower drum connection conversion device

Abstract

The utility model discloses a cavity splicing steel-concrete fan tower tube and steel tower tube connection conversion device, and belongs to the field of wind power generation engineering. The device comprises a steel tower drum and a spliced cavity steel-concrete fan tower drum connected with the steel tower drum, an upper bolt supporting bearing seat is arranged at the bottom of the steel tower drum; a lower bolt supporting bearing seat is arranged at the top of the spliced cavity steel-concrete fan tower barrel; the upper bolt supporting bearing seat and the lower bolt supporting bearing seat are connected through a plurality of connecting pieces; the connecting structure fills the gap of a connecting scheme of the steel tower drum and the spliced cavity steel-concrete fan tower drum, and can be popularized and applied in a large range; by arranging the supporting bearing seat and the connecting piece, the device has good strength and fatigue resistance, and the overall reliability of the structure is improved; the structure is simple, and manufacturing and mounting are efficient.

Description

Technical Field

[0001] The utility model relates to the field of wind power generation engineering, in particular to a connection conversion device for a cavity steel-concrete wind turbine tower and a steel tower. Background Art

[0002] As the height of wind power resource development space and the capacity of units increase day by day, the problems of excessive dynamic response and insufficient stability under wind load have gradually become the main factors restricting the application of traditional tubular steel tower structures in tall wind turbine tower systems. An assembled cavity steel-concrete composite structure wind turbine tower is composed of hollow steel and concrete. After the side limbs of the steel cavity are welded into a whole in the factory, concrete is poured inside the cavity to form a prefabricated component. The steel cavity and core concrete of this structural system provide effective constraints and support to each other, enhance the stability of the steel plate, and then give full play to the material properties of steel and concrete. The structure has high bearing capacity, good rigidity, and is easy to construct, which is suitable for the characteristics of remote areas where wind power projects are generally located.

[0003] At present, the height of onshore wind turbine towers has reached 150m or even higher. The requirements for hoisting machinery at the top of the tower are more stringent and there are many safety risks. At the same time, because the force on the upper part of the tower is relatively small, traditional steel round tubes can be used to save costs. Therefore, the hybrid wind turbine tower composed of a combination of a cavity steel-concrete wind turbine tower and a steel tower is a more reasonable and economical wind turbine tower structure system. However, wind turbines are subjected to large wind loads all year round, and the construction environment of wind power projects is harsh. The strength, rigidity, reliability and installation convenience of the connection scheme between the cavity steel-concrete wind turbine tower and the steel tower are high. Therefore, how to safely and efficiently connect the two tower structures has become a key issue that needs to be solved. Utility Model Content

[0004] The purpose of the utility model is to provide a connection device between a cavity steel-concrete wind turbine tower and a steel tower, so as to solve the problem that there is currently a lack of relevant connection solutions for the connection between the cavity steel-concrete wind turbine tower and the steel tower. The two structures are connected by a connecting piece and a supporting bracket, and have the characteristics of high connection strength, high rigidity, and efficient installation, and can ensure the reliability of the connection under long-term wind loads.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a connection conversion device between a cavity steel-concrete wind turbine tower and a steel tower, comprising a steel tower and a cavity steel-concrete wind turbine tower connected thereto; an upper bolt support bracket is arranged at the bottom of the steel tower; a lower bolt support bracket is arranged at the top of the cavity steel-concrete wind turbine tower; the upper bolt support bracket and the lower bolt support bracket are connected by a plurality of connecting pieces.

[0007] Preferably, the steel tower is located above the cavity steel-concrete wind turbine tower.

[0008] Preferably, the steel tower is connected to the cavity steel-concrete wind turbine tower via a plurality of connecting pieces.

[0009] Preferably, the connecting member is a bolt.

[0010] Preferably, a steel plate is arranged on the top of the upper bolt support bracket; and steel plates are arranged in the middle and on the top of the lower bolt support bracket.

[0011] Preferably, a plurality of stiffening ribs are provided inside the upper bolt support bracket and the lower bolt support bracket.

[0012] Preferably, the top surface of the stiffening rib of the upper bolt support bracket is connected to the top steel plate of the upper bolt support bracket; the side and bottom surfaces of the stiffening rib of the upper bolt support bracket are both connected to the steel tower.

[0013] Preferably, the top surface of the stiffening rib of the lower bolt support bracket is connected to the top steel plate or the middle steel plate of the lower bolt support bracket; the side surface of the stiffening rib of the lower bolt support bracket is connected to the spliced ​​cavity steel-concrete wind turbine tower; the bottom surface of the stiffening rib of the lower bolt support bracket is connected to the middle steel plate or the spliced ​​cavity steel-concrete wind turbine tower.

[0014] Preferably, there is a cavity structure between the middle steel plate of the lower bolt support bracket and the cavity steel-concrete wind turbine tower.

[0015] Preferably, the lower bolt support bracket is connected to the cavity steel-concrete wind turbine tower through a plurality of bolts.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a connection conversion device for a steel tower and a cavity steel-concrete wind turbine tower. The upper bolt support bracket at the bottom of the steel tower is connected to the bolt support bracket under the top of the cavity steel-concrete wind turbine tower by a connecting piece, thereby connecting the steel tower and the cavity steel-concrete wind turbine tower, filling the gap in the connection scheme between the steel tower and the cavity steel-concrete wind turbine tower, and can be widely promoted and applied. By setting the support bracket and the connecting piece, the device has good strength and fatigue resistance, improves the overall reliability of the structure, and the device installation process is convenient, fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention.

[0019] In the attached picture:

[0020] Figure 1 This is a schematic diagram of a connection conversion device for a cavity steel-concrete fan tower and a steel tower of the utility model;

[0021] Figure 2 for Figure 1 A side cross-sectional diagram of ;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of .

[0023] Among them, 1-steel tower, 2-cavity steel-concrete wind turbine tower, 3-upper bolt support bracket, 4-lower bolt support bracket, 5-bolt, 6-stiffening rib, 7-bolt. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0026] The utility model provides a connection conversion device between a cavity steel-concrete wind turbine tower and a steel tower, comprising a steel tower 1 and a cavity steel-concrete wind turbine tower 2 connected thereto; the steel tower and the cavity steel-concrete wind turbine tower are connected by a plurality of connecting members, preferably, the connecting members are bolts 5. The cavity steel-concrete wind turbine tower 2 is located below the steel tower 1; it also comprises an upper bolt support bracket 3, a lower bolt support bracket 4 and bolts 5; the upper bolt support bracket 3 and the lower bolt support bracket 4 are connected by a plurality of connecting members, preferably, the connecting members are bolts 5. An upper bolt support bracket 3 is provided at the bottom of the steel tower 1, a steel plate is provided at the top of the upper bolt support bracket 3, and a plurality of stiffening ribs 6 are provided inside the upper bolt support bracket 3. A lower bolt support bracket 4 is arranged at the top of the cavity steel-concrete wind turbine tower 2, steel plates are arranged at the top and middle of the lower bolt support bracket 4, a plurality of stiffening ribs 6 are arranged inside the lower bolt support bracket 4, and the lower bolt support bracket 4 is divided into two parts, wherein a cavity structure exists between the middle steel plate and the cavity steel-concrete wind turbine tower 2, which is convenient for the installation of the bolts 5.

[0027] The top surface of the stiffening rib 6 of the upper bolt support bracket 3 is connected to the top steel plate of the upper bolt support bracket 3; the side and bottom surfaces of the stiffening rib 6 of the upper bolt support bracket 3 are connected to the steel tower 1. The top surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the top steel plate or the middle steel plate of the lower bolt support bracket 4; the side surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the cavity steel-concrete wind turbine tower 2; the bottom surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the middle steel plate or the cavity steel-concrete wind turbine tower 2.

[0028] The upper steel tower 1 and the lower cavity steel-concrete wind turbine tower 2 are connected by a plurality of bolts 5. Bolt holes are reserved in the top plate and the bottom plate of the upper bolt support bracket and the lower bolt support bracket. A plurality of bolts 5 pass through the two bolt support brackets respectively and are tightened and fixed with double nuts.

[0029] The lower bolt support bracket 4 is connected to the cavity steel-concrete wind turbine tower 2 through bolts 7 to increase the connection strength.

[0030] The following is a further detailed description of a cavity steel-concrete fan tower and a steel tower connection conversion device of the utility model in conjunction with the accompanying drawings:

[0031] like Figure 1As shown, in the transition section between the cavity steel-concrete wind turbine tower 2 and the steel tower 1, the steel tower 1 is located above the cavity steel-concrete wind turbine tower 2, and the steel tower 1 and the cavity steel-concrete wind turbine tower 2 are connected by bolts 5, preferably fixed by friction-type high-strength bolts, which not only ensures the tightness of the connection, but also provides strong resistance under the influence of external loads such as wind force, thereby improving the safety of the system. An upper bolt support bracket 3 is set at the bottom of the upper steel tower 1, and a lower bolt support bracket 4 is set at the top of the lower cavity steel-concrete wind turbine tower 2, providing a stable installation position for the bolts, making the transition section of the entire tower more stable.

[0032] like Figure 2 As shown, a steel plate is arranged on the top of the upper bolt support bracket 3; and steel plates are arranged in the middle and the top of the lower bolt support bracket 4. The middle steel plate of the lower bolt support bracket 4 divides it into two parts. There is a cavity structure between the middle steel plate of the lower bolt support bracket 4 and the top of the cavity steel-concrete wind turbine tower 2, which is convenient for installing bolts 5. The lower bolt support bracket 4 is connected to the cavity steel-concrete wind turbine tower 2 by bolts 7, which improves the local stiffness of the connection.

[0033] like Figure 3 As shown, stiffening ribs 6 are provided inside the upper bolt support bracket 3 and the lower bolt support bracket 4 to improve the uniformity of the force of the structure at the connection. The top surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the top steel plate or the middle steel plate of the lower bolt support bracket 4, the side surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the cavity steel-concrete wind turbine tower 2, and the bottom surface of the stiffening rib 6 of the lower bolt support bracket 4 is connected to the middle steel plate or the cavity steel-concrete wind turbine tower 2, which enhances the internal rigidity, has a higher overall structural strength, and can greatly improve the stability and safety of the entire wind turbine tower.

[0034] Secondly, the upper bolt support bracket 3 is 300mm high. The lower bolt support bracket 4 is 500mm high in total, of which the cavity structure is 200mm high. The top plate, bottom plate and side steel plates of the upper bolt support bracket 3 and the lower bolt support bracket 4 are all 25mm thick, and the plate thickness of the stiffening rib 6 is 20mm.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. A device for connecting and converting a cavity steel-concrete fan tower and a steel tower, characterized in that: The invention comprises a steel tower (1) and a cavity steel-concrete wind turbine tower (2) connected thereto; an upper bolt support bracket (3) is arranged at the bottom of the steel tower (1); a lower bolt support bracket (4) is arranged at the top of the cavity steel-concrete wind turbine tower (2); the upper bolt support bracket (3) and the lower bolt support bracket (4) are connected via a plurality of connecting pieces.

2. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: The steel tower (1) is located above the cavity steel-concrete fan tower (2).

3. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: The steel tower (1) is connected to the cavity steel-concrete fan tower (2) via a plurality of connecting pieces.

4. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 3 is characterized in that: The connecting piece is a bolt (5).

5. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: A steel plate is arranged on the top of the upper bolt support bracket (3); and steel plates are arranged in the middle and on the top of the lower bolt support bracket (4).

6. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: A plurality of stiffening ribs (6) are arranged inside the upper bolt support bracket (3) and the lower bolt support bracket (4).

7. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 6, characterized in that: The top surface of the stiffening rib (6) of the upper bolt support bracket (3) is connected to the top steel plate of the upper bolt support bracket (3); the side and bottom surfaces of the stiffening rib (6) of the upper bolt support bracket (3) are both connected to the steel tower (1).

8. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 6, characterized in that: The top surface of the reinforcing rib (6) of the lower bolt support bracket (4) is connected to the top steel plate or the middle steel plate of the lower bolt support bracket (4); the side surface of the reinforcing rib (6) of the lower bolt support bracket (4) is connected to the cavity steel-concrete wind turbine tower (2); the bottom surface of the reinforcing rib (6) of the lower bolt support bracket (4) is connected to the middle steel plate or the cavity steel-concrete wind turbine tower (2).

9. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: There is a cavity structure between the middle steel plate of the lower bolt support bracket (4) and the cavity steel-concrete wind turbine tower (2).

10. The device for connecting and converting a cavity steel-concrete wind turbine tower and a steel tower according to claim 1, characterized in that: The lower bolt support bracket (4) is connected to the cavity steel-concrete fan tower (2) via a plurality of bolts (7).

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