A multi-cavity steel-plate concrete composite cylinder of welded T-shaped constraint ribbed plate and construction method

Abstract

The application discloses a kind of welded T-shaped constraint rib plate multi-cavity steel plate concrete composite cylinder and construction method, including multi-cavity steel plate concrete composite cylinder barrel, barrel is assembled by several tower cylinder ring pieces along the ring direction, segmented assembly along height direction, and along its height direction barrel section diameter decreases.Tower cylinder ring piece includes multi-cavity combination wall shell and interlayer concrete arranged in shell.Multi-cavity combination wall shell is welded by arc inner steel plate, arc outer steel plate, side plate and several T-shaped constraint rib plates.T-shaped constraint rib plate is provided with round hole.The application uses T-shaped constraint rib plate to connect inner and outer steel plates, improves the stability of steel plate;The concrete tenon in the rib plate round hole enhances the collaborative working capacity of steel plate and interlayer concrete;Arc outer steel plate is connected by several outer steel plate sub-units butt welding, reduces construction difficulty, improves construction efficiency, all components are produced by standardization, transportation is convenient, assembly is simple, and has broad engineering application prospect.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, and relates to the combined structure of turbine installation, and particularly to a multi-cavity steel plate concrete composite cylinder with welded T-shaped constraint ribs and its construction method. Background Technology

[0002] Wind energy is an important type of renewable energy driving energy structure transformation, and wind power generation is a crucial component of decarbonizing the new power system. The tower, as the vertical support structure in a wind turbine generator, is a vital load-bearing component ensuring the normal operation of the turbine. With the shift of onshore wind power focus towards low-wind-speed areas, the application of large-megawatt wind turbine generators is becoming an inevitable trend, further highlighting the importance of the tower.

[0003] Currently, wind turbine towers are still mainly tapered steel towers, which are simple in construction and easy to install, but have low load-bearing capacity and poor stability. As the diameter and height of wind turbine towers increase, the requirements for tower strength and stability further increase. Ordinary pure steel structure towers often cannot meet the stability requirements, or the cross-sectional dimensions and wall thickness of steel towers will increase significantly to meet the requirements, resulting in a substantial increase in construction costs, making it difficult to meet the development needs of large-megawatt wind turbine units. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a multi-cavity steel plate concrete composite cylinder with welded T-shaped constraint ribs and a construction method thereof, so as to meet the strength and stability requirements when the diameter and height of the wind turbine tower are increased, and to reduce the construction difficulty.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs includes a cylinder body, which is assembled by fastening several tubular cylinder segments together along the axial direction through vertical flange nodes. The diameter of each cylinder segment decreases along the height direction of the cylinder body.

[0007] Each of the cylindrical sections is assembled from several tower ring plates along the circumferential direction. Within a single cylindrical section, adjacent tower ring plates are fastened together by circumferential nodes.

[0008] The tower ring is composed of a multi-cavity composite wall shell and a layer of concrete set inside the multi-cavity composite wall shell; the multi-cavity composite wall shell is composed of an arc-shaped inner steel plate, an arc-shaped outer steel plate, side plates and T-shaped restraint ribs.

[0009] In one embodiment, the T-shaped constraint rib is welded from a flange and a web, with the side of the web away from the flange welded to the outer side of the inner arc-shaped steel plate, and the flange welded to the outer arc-shaped steel plate.

[0010] In one embodiment, the arc-shaped outer steel plate is composed of several arc-shaped outer steel plate sub-units of equal size welded together at the flange plate.

[0011] In one embodiment, the web has equally spaced circular holes at its center along the height direction.

[0012] In one embodiment, the T-shaped constraint ribs are arranged along the axial length of the tower ring and at equal intervals along the radial direction of the tower ring.

[0013] In one embodiment, the circumferential node is composed of H-beams, high-strength bolts, and stiffening ribs. The H-beams are arranged axially, and the stiffening ribs are vertically welded between the web and flange of the H-beams. One flange of the H-beams is welded to the side of the tower ring, and a reserved hole is provided on the other side. Adjacent tower rings are connected by the high-strength bolts and the reserved holes.

[0014] In one embodiment, the interlayer concrete is ordinary concrete, recycled concrete, self-compacting concrete, RPC, or UHPC.

[0015] In one embodiment, the vertical flange node is an L-shaped flange bolt connection structure, including an L-shaped flange plate welded to the upper and lower cylinder sections and two high-strength bolts arranged at equal intervals along the circumferential direction of the tower cylinder.

[0016] The present invention also provides a construction method for the multi-cavity steel plate concrete composite cylinder with the welded T-shaped restraining ribs, the steps of which are as follows:

[0017] 1) Roll the steel plate into an arc-shaped inner steel plate and an arc-shaped outer steel plate;

[0018] 2) Weld the side plates to the circumferential ends of the arc-shaped inner steel plate and weld the arc-shaped outer steel plate to complete the main processing of the multi-cavity combined wall shell. Pour interlayer concrete into the multi-cavity combined wall shell to complete the processing of the tower ring plate.

[0019] 3) Weld circumferential nodes on both sides of the tower ring plate, transport the tower ring plate to the site, and complete the connection of one cylinder segment through the circumferential nodes. Repeat the above splicing operation to obtain several cylinder segments. Connect each cylinder segment along the axial direction through vertical flange nodes to obtain a multi-cavity steel plate concrete composite cylinder.

[0020] In one embodiment, processing the multi-cavity composite wall shell further includes:

[0021] The steel plate is rolled and bent into several arc-shaped outer steel plate sub-units;

[0022] The web plate and the flange plate are welded together to form a T-shaped restraint rib.

[0023] The side of the web away from the flange is welded to the outside of the arc-shaped inner steel plate;

[0024] The arc-shaped outer steel plate sub-units are welded onto the flange plate to form an arc-shaped outer steel plate;

[0025] Processing the circumferential node further includes:

[0026] Pre-drilled holes and welded stiffening ribs are made on one flange of the H-beam;

[0027] The tower ring is welded to the flange of an H-beam on each side.

[0028] During on-site connection, high-strength bolts are inserted into the pre-drilled holes of adjacent H-beams to connect the adjacent tower rings.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1) Superior performance

[0031] The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs adopts a multi-cavity composite wall shell to restrain the interlayer concrete, which improves the load-bearing capacity and overall stiffness of the tower. The interlayer concrete provides out-of-plane support for the steel plate, improving its stability. The T-shaped restraint ribs provide tension to prevent local buckling of the inner and outer steel plates. The concrete tenons in the stiffening rib holes enhance the synergistic working ability between the steel plate and the interlayer concrete, improving the overall integrity of the tower.

[0032] 2) Simple construction

[0033] The multi-cavity steel plate concrete composite cylinder with welded T-shaped constraint ribs uses T-shaped constraint ribs to connect the inner and outer steel plates. The flanges of the T-shaped constraint ribs facilitate the installation and welding of the outer steel plate sub-units. The multi-cavity composite wall shell serves as a template for pouring the interlayer concrete, eliminating the need for formwork support and dismantling. The structure is simple and construction is convenient. High-strength bolts are used to connect the various tower rings, making installation convenient and the connection reliable.

[0034] 3) Reduce construction costs

[0035] The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs fully utilizes the material properties of steel and concrete. Compared with steel structure towers, it significantly reduces the amount of steel used. The tower rings can be transported in sections without being restricted by road capacity, thus reducing transportation costs. The section assembly also facilitates the stacking of components on the construction site, while reducing the requirements for hoisting tools, lowering project costs, and resulting in good economic benefits.

[0036] In general, the multi-cavity steel-concrete composite cylinder with welded T-shaped restraint ribs utilizes a multi-cavity composite wall shell to restrain the sandwich concrete layer, with T-shaped restraint ribs connecting the inner and outer steel plates. This fully leverages the advantages of the composite structure, resulting in high load-bearing capacity, strong stability, high overall stiffness, and simple construction. All components of the composite cylinder are manufactured in a standardized manner in the factory and then transported to the site for assembly, significantly improving construction efficiency and economic benefits. Therefore, conducting in-depth research on the multi-cavity steel-concrete composite cylinder with welded T-shaped restraint ribs to promote its widespread application is of great practical engineering significance. Attached Figure Description

[0037] Figure 1 This is an overall schematic diagram of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0038] Figure 2 This is a cross-sectional view of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0039] Figure 3 This is an overall schematic diagram of the tower ring of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0040] Figure 4 This is an overall schematic diagram of the circumferential nodes of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0041] Figure 5 This is an overall schematic diagram of the T-shaped constraint rib of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0042] Figure 6 This is an overall schematic diagram of the connection method of the multi-cavity steel plate concrete composite cylinder of the present invention.

[0043] Figure 7 This is an overall schematic diagram of the second multi-cavity steel plate concrete composite cylinder connection method of the present invention.

[0044] Icons: 1-Cylinder body; 2-Tower ring plate; 3-Circumferential node; 4-Vertical flange node; 5-Multi-cavity composite wall shell; 6-Interlayer concrete; 7-Arc-shaped inner steel plate; 8-Arc-shaped outer steel plate; 9-Arc-shaped outer steel plate sub-unit; 10-Side plate; 11-T-shaped restraint rib; 12-Flange plate; 13-Web plate; 14-Smooth round hole; 15-H-beam; 16-Reserved hole; 17-High-strength bolt; 18-Stiffening rib; 19-Welding; 20-L-shaped flange plate; 21-High-strength bolt II. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] like Figures 1 to 7 As shown, this invention relates to a multi-cavity steel-concrete composite cylinder with welded T-shaped restraint ribs, comprising a cylinder body 1. The cylinder body 1 is axially assembled from several cylinder segments connected together. Clearly, each cylinder segment is a tubular structure, and adjacent tubular segments are fastened together by vertical flange nodes 4. Furthermore, to meet the requirements of wind turbine towers, the diameter of each cylinder segment gradually decreases along the height direction of the cylinder body 1.

[0050] For a single cylindrical section, it is assembled from several tower ring pieces 2 along the circumferential direction. In this invention, within a single cylindrical section, adjacent tower ring pieces 2 are fastened together through circumferential nodes 3.

[0051] The tower ring 2 is the core structure of this invention. It consists of a multi-cavity composite wall shell 5 and a sandwiched concrete 6. The multi-cavity composite wall shell 5 is composed of an arc-shaped inner steel plate 7, an arc-shaped outer steel plate 8, side plates 10, and T-shaped restraining ribs 11. The sandwiched concrete 6 is filled inside the multi-cavity composite wall shell 5. The T-shaped restraining ribs 11 connect the arc-shaped inner steel plate 7 and the arc-shaped outer steel plate 8.

[0052] In this invention, a T-shaped constraint rib 11 is used to connect the inner arc-shaped steel plate 7 and the outer arc-shaped steel plate 8, which can improve the stability of the steel plate.

[0053] In one embodiment of the present invention, the T-shaped constraint rib 11 is a T-shaped structure formed by welding a flange 12 and a web 13. The side of the web 13 away from the flange 12 is welded to the outer side of the arc-shaped inner steel plate 7, while the flange 12 is welded to the arc-shaped outer steel plate 8.

[0054] This embodiment provides a specific structure and arrangement of the T-shaped constraint rib 11. Under this structure, the T-shaped constraint rib 11 is easier to process and install, and it is more conducive to improving the stability of the steel plate.

[0055] In one embodiment of the present invention, reference is made to... Figure 3 and Figure 5 The arc-shaped outer steel plate 8 is composed of several arc-shaped outer steel plate sub-units 9, each of which is welded to the flange plate 12 to form the arc-shaped outer steel plate 8. Obviously, each arc-shaped outer steel plate sub-unit 9 should be set with the same size, and the length of the T-shaped constraint rib 11 is determined according to the preset wall thickness of the combined cylinder.

[0056] In this embodiment, multiple arc-shaped outer steel plate sub-units 9 are welded together to form an arc-shaped outer steel plate 8, which can greatly reduce the difficulty of construction and improve the efficiency of construction.

[0057] In one embodiment of the present invention, the web plate 13 has equally spaced circular holes 14 at its center along the height direction.

[0058] In this embodiment, after the interlayer concrete 6 is filled, the concrete tenon in the smooth circular hole 14 can enhance the collaborative working ability between the steel plate and the interlayer concrete 16.

[0059] In one embodiment of the present invention, the T-shaped constraint ribs 11 are arranged along the axial length of the tower ring plate 2 and at equal intervals along the radial direction of the tower ring plate 2. This equal-interval arrangement is for both ease of manufacturing and to meet the requirement of uniform stress distribution.

[0060] In one embodiment of the present invention, reference is made to... Figure 4 and Figure 6 The circumferential node 3 consists of H-beams 15, high-strength bolts 17, and stiffening ribs 18. The H-beams 15 are arranged axially, and the stiffening ribs 18 are vertically welded between the web and flange of the H-beams 15. One flange of the H-beams 15 is welded to the side of the tower ring 2, and pre-drilled holes 16 are provided on the other side. Adjacent tower rings 2 can be connected by high-strength bolts 17 and pre-drilled holes 16.

[0061] This embodiment provides a specific structure and arrangement of the circumferential node 3. Under this structure, the circumferential connection of the tower is reliable, exhibiting good seismic performance and fatigue resistance. Adjacent tower ring plates mutually constrain each other and share the load. For example, the reserved holes 16 and stiffening ribs 18 are arranged alternately, with the reserved holes 16 evenly spaced along the axial direction.

[0062] In one embodiment of the present invention, the interlayer concrete 6 can be ordinary concrete, recycled concrete, self-compacting concrete, RPC or UHPC, etc., and can be selected based on a comprehensive consideration of strength requirements and cost.

[0063] In one embodiment of the present invention, the vertical flange node 4 can adopt an L-shaped flange bolt connection structure, including an L-shaped flange plate welded to the upper and lower cylinder sections and two high-strength bolts arranged at equal intervals along the circumferential direction of the tower cylinder.

[0064] refer to Figure 7 This invention involves welding adjacent tower ring plates 2 to form a single tower segment, which is then connected and secured using vertical flange nodes 4. All components are manufactured using standardized methods, ensuring convenient transportation and easy installation, and thus possessing broad prospects for engineering applications.

[0065] The specific construction method of this invention is as follows:

[0066] 1. The steel plate is rolled into an arc-shaped inner steel plate 7 and several arc-shaped outer steel plate sub-units 9; a smooth round hole 14 is opened in the center of the web plate 13 and welded to the flange plate 12 to form a T-shaped restraint rib plate 11; a reserved hole 16 is opened on one side flange of the H-beam 15 and a stiffening rib 18 is welded on it.

[0067] 2. Weld T-shaped constraint ribs 11 to the outside of the arc-shaped inner steel plate 7, weld side plates 10 to both ends of the arc-shaped inner steel plate 7, and weld the arc-shaped outer steel plate sub-units 9 onto the flange plates 12 of the T-shaped constraint ribs 11 to form the arc-shaped outer steel plate 8, thus completing the processing of the multi-cavity composite wall shell 5. Pour interlayer concrete 6 into the multi-cavity shell to complete the processing of the tower ring plate 2.

[0068] 3. Weld H-beams 15 to both ends of the tower ring 2, transport the tower ring 2 to the site, and connect a section of the combined cylinder body 1 through the circumferential node 3. Repeat the above splicing operation to obtain several sections of the combined cylinder body 1. Connect each section of the combined cylinder body 1 along the height direction through the vertical flange node 4 to obtain a multi-cavity steel plate concrete combined cylinder.

[0069] In summary, this invention proposes a multi-cavity steel-concrete composite cylinder with welded T-shaped restraining ribs and its construction method. The cylinder body is assembled circumferentially from several tower ring sections, and segmented along the height direction, with the diameter of each segment decreasing along the height direction. Each tower ring section includes a multi-cavity composite wall shell and a layer of concrete within the shell. The multi-cavity composite wall shell is welded from an arc-shaped inner steel plate, an arc-shaped outer steel plate, side plates, and several T-shaped restraining ribs. This invention utilizes a multi-cavity composite wall shell to restrain the concrete layer, with T-shaped restraining ribs connecting the inner and outer steel plates, fully utilizing the material properties of steel and concrete. It offers advantages such as high load-bearing capacity, strong stability, high overall stiffness, and simple construction. All components are manufactured in a standardized factory, facilitating transportation and on-site assembly. This solves key problems such as low load-bearing capacity, poor stability, and low stiffness of conical steel towers under the trend of larger wind turbines, and has significant engineering practical significance and socio-economic benefits.

[0070] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-cavity steel plate concrete composite cylinder with welded T-shaped restraining ribs, characterized in that, Includes a cylindrical body (1), which is assembled by fastening several tubular cylindrical segments together along the axial direction through vertical flange nodes (4). The diameter of each cylindrical segment decreases along the height direction of the cylindrical body (1). Each of the cylindrical sections is assembled from several tower ring plates (2) along the circumferential direction. Within a single cylindrical section, adjacent tower ring plates (2) are fastened together through circumferential nodes (3). The tower ring (2) is composed of a multi-cavity composite wall shell (5) and a sandwich concrete (6) disposed within the multi-cavity composite wall shell (5); the multi-cavity composite wall shell (5) is composed of an arc-shaped inner steel plate (7), an arc-shaped outer steel plate (8), a side plate (10) and a T-shaped restraint rib (11); The T-shaped constraint rib (11) is welded from a flange plate (12) and a web plate (13). The side of the web plate (13) away from the flange plate (12) is welded to the outside of the arc-shaped inner steel plate (7). The flange plate (12) is welded to the arc-shaped outer steel plate (8). The arc-shaped outer steel plate (8) is composed of several arc-shaped outer steel plate sub-units (9) of equal size welded together at the flange plate (12).

2. The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs according to claim 1, characterized in that, The web (13) has equally spaced circular holes (14) at its center along the height direction.

3. The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs according to claim 1, characterized in that, The T-shaped constraint ribs (11) are arranged along the axial length of the tower ring (2) and at equal intervals along the radial direction of the tower ring (2).

4. The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraining ribs according to any one of claims 1 to 3, characterized in that, The circumferential node (3) is composed of H-beam (15), high-strength bolts (17) and stiffening ribs (18). The H-beam (15) is arranged along the axial direction. The stiffening ribs (18) are vertically welded between the web and the flange of the H-beam (15). One flange of the H-beam (15) is welded to the side of the tower ring (2), and a reserved hole (16) is provided on the other side. The adjacent tower rings (2) are connected by the high-strength bolts (17) and the reserved hole (16).

5. The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs according to claim 1, characterized in that, The interlayer concrete (6) is ordinary concrete, recycled concrete, self-compacting concrete, RPC or UHPC.

6. The multi-cavity steel plate concrete composite cylinder with welded T-shaped restraint ribs according to claim 1, characterized in that, The vertical flange node (4) is an L-shaped flange bolt connection structure, including an L-shaped flange plate (20) welded to the upper and lower cylinder sections and two high-strength bolts (21) arranged at equal intervals along the circumference of the tower cylinder.

7. The construction method of the multi-cavity steel plate concrete composite cylinder with welded T-shaped restraining ribs as described in claim 1, characterized in that, The steps are as follows: 1) The steel plate is rolled into an arc-shaped inner steel plate (7) and an arc-shaped outer steel plate (8); 2) Weld the side plate (10) to both ends of the arc-shaped inner steel plate (7) and weld the arc-shaped outer steel plate (8) to complete the main body processing of the multi-cavity combined wall shell (5). Pour the interlayer concrete (6) into the multi-cavity combined wall shell (5) to complete the processing of the tower ring plate (2). 3) Weld circumferential nodes (3) on both sides of the tower ring (2), transport the tower ring (2) to the site, and complete the connection of a cylinder segment through the circumferential nodes (3). Repeat the above splicing operation to obtain several cylinder segments. Connect each cylinder segment along the axial direction through the vertical flange nodes (4) to obtain a multi-cavity steel plate concrete composite cylinder.

8. The construction method according to claim 7, characterized in that, The processing of the multi-cavity composite wall shell (5) further includes: The steel plate is rolled into several arc-shaped outer steel plate sub-units (9); The web plate (13) and the flange plate (12) are welded together to form a T-shaped restraint rib plate (11); The side of the web plate (13) away from the flange plate (12) is welded to the outside of the arc-shaped inner steel plate (7); The arc-shaped outer steel plate subunit (9) is welded onto the flange plate (12) to form an arc-shaped outer steel plate (8); Processing the circumferential node (3) further includes: A pre-drilled hole (16) is made on one side flange of the H-beam (15) and a stiffening rib (18) is welded thereon. The two sides of the tower ring plate (2) are respectively welded to the flanges of an H-beam (15); During on-site connection, high-strength bolts (17) are inserted into the reserved holes (16) of adjacent H-beams (15) to achieve the connection of adjacent tower rings (2).

Images