Steel-concrete composite structure transition section and wind power generation tower

Abstract

The utility model discloses a steel-concrete composite structure transition section and a wind power generation tower, the wind power generation tower comprises the steel-concrete composite structure transition section, a steel tower tube and a lattice section, the steel-concrete composite structure transition section is connected between the steel tower tube and the lattice section; the steel-concrete composite structure transition section comprises a steel-concrete platform, a bottom connecting layer and a lattice type tower. The steel concrete platform comprises a circular inner steel shell, a circular outer steel shell and a steel tower connecting concrete layer, the outer steel shell coaxially sleeves the inner steel shell, and the steel tower connecting concrete layer is connected between the inner steel shell and the outer steel shell in a filling manner. The bottom connecting layer comprises four corner columns and four transverse connecting rods, the four corner columns are located at the four corners of the steel concrete platform, and the lattice type tower comprises a plurality of supporting rods. According to the transition section of the steel-concrete composite structure, a rigid platform with high rigidity can be provided between the lower lattice section and the upper steel tower drum, and the phenomenon that stress is concentrated when the stress of the upper steel tower drum is transmitted to the lower lattice section can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to onshore and offshore wind power generation technologies, and particularly relates to a steel-concrete composite structure transition section and a wind power tower. Background Art

[0002] The prestressed concrete-filled steel tubular lattice tower is composed of a steel tower barrel of pure steel structure in the upper part and a prestressed concrete-filled steel tubular lattice column in the lower part, which converts the bending mode of single members into the axial force acting mode of corner members, giving full play to the advantages of high bearing capacity and large lateral stiffness of the concrete-filled steel tubular structure in high-rise structures. Moreover, the lattice column materials are located at the corners of the cross-section, far from the neutral axis, and the material strength utilization rate is high, so as to save materials and improve stiffness. At the same time, the application of prestress makes the concrete under full-section compression, and the vertical steel pipe connecting flanges and bolts are always under compression. The prestress is used to reduce the average stress under fatigue load at the joints of the lattice tower, thereby improving the fatigue life, which also has good feasibility and economy.

[0003] In the design process, the connection between the lattice section and the steel tower barrel is crucial. On the one hand, the outer diameter of the upper steel tower is generally about 4.5m, and the bottom diameter of the lattice section is generally about 48m. On the other hand, how to transfer the large concentrated load and bending moment in the upper part to the lower lattice section is a problem that must be considered in the design process of the transition section. The main function of the transition section is to transfer the load of the upper steel tower barrel well to the four corner columns of the lower lattice. Due to the unique structural form at this place, there is a large concentrated load at the top of the lattice struts, which will cause an unfavorable stress concentration phenomenon in the upper steel tower barrel. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the technical problem to be solved by the utility model is to provide a steel-concrete composite structure transition section and a wind power tower, which can provide a rigid platform with relatively large stiffness between the lower lattice section and the upper steel tower barrel, and can effectively solve the stress concentration phenomenon that occurs when the force of the upper steel tower barrel is transmitted to the lower lattice section.

[0005] In order to achieve the above purpose, the utility model is realized by the following technical solutions: A steel-concrete composite structure transition section and a wind power tower, comprising:

[0006] A steel-concrete platform, the steel-concrete platform includes a circular inner steel shell, a circular outer steel shell and a steel tower connecting concrete layer. The outer steel shell is coaxially sleeved outside the inner steel shell, and the steel tower connecting concrete layer is filled and connected between the inner steel shell and the outer steel shell. The steel tower connecting concrete layer can be connected with the steel tower barrel;

[0007] The bottom connection layer includes four corner columns and four transverse connecting rods. There are four corner columns, and the four corner columns are located below the steel-concrete platform and at the four corners of the steel-concrete platform. The four corner columns can be connected to the lattice section; and

[0008] The lattice tower includes a plurality of support rods, and all the support rods are circumferentially and spacedly connected between the steel-concrete platform and the bottom connection layer. The lattice tower can evenly transfer the force on the steel-concrete platform to the bottom connection layer.

[0009] Further, the steel tower-connected concrete layer includes an intermediate steel shell, connecting rib plates and a concrete layer. The intermediate steel shell is located between the inner steel shell and the outer steel shell. There are a plurality of connecting rib plates, and the plurality of connecting rib plates are circumferentially and spacedly connected between the inner steel shell and the intermediate steel shell, and between the intermediate steel shell and the outer steel shell. The adjacent two connecting rib plates are filled with the concrete layer, and the top of the intermediate steel shell is higher than the inner steel shell and the outer steel shell. The top of the intermediate steel shell can be connected to the steel tower barrel.

[0010] Further, a plurality of stud bolts are spacedly arranged on the outer wall of the inner steel shell, the inner wall of the outer steel shell, the inner and outer walls of the intermediate steel shell and both sides of the connecting rib plates.

[0011] Further, the steel-concrete platform further includes a bottom plate, and the inner steel shell, the outer steel shell and the steel tower-connected concrete layer are all arranged on the bottom plate.

[0012] Further, the support rods are divided into four groups, and the four groups of support rods are circumferentially and evenly spaced.

[0013] Further, each group of support rods includes three support rods. The two ends of the middle support rod are respectively connected to the steel-concrete platform and the corner column. The other two support rods are relatively located on the left and right sides of the middle support rod, and the two ends of these two support rods are respectively connected to the steel-concrete platform and the corresponding transverse connecting rod.

[0014] Further, the lattice tower further includes a plurality of node plates, and the plurality of node plates are respectively fixed on the steel-concrete platform, the corner column or the transverse connecting rod. A connecting plate is arranged at each end of each support rod, and the two ends of the support rod are detachably connected to the corresponding node plate through the connecting plate.

[0015] A wind power tower includes the above-mentioned steel-concrete combined structure transition section, and further includes a steel tower barrel and a lattice section. The steel-concrete combined structure transition section is connected between the steel tower barrel and the lattice section.

[0016] The beneficial effects of the present utility model:

[0017] The above-mentioned wind power tower and the transition section of the steel-concrete composite structure. The wind power tower includes a steel-concrete composite structure transition section, a steel tower barrel, and a lattice section. The steel-concrete composite structure transition section includes a steel-concrete platform, a bottom connection layer, and a lattice tower. The steel-concrete platform includes a circular inner steel shell, a circular outer steel shell, and a steel tower connection concrete layer. The outer steel shell is coaxially sleeved outside the inner steel shell, and the steel tower connection concrete layer is filled and connected between the inner steel shell and the outer steel shell. The steel tower connection concrete layer can be connected to the steel tower barrel.

[0018] The bottom connection layer includes four corner columns and four transverse connecting rods. There are four corner columns, and the four corner columns are located below the steel-concrete platform and at the four corners of the steel-concrete platform. The four corner columns can be connected to the lattice section. The lattice tower includes a plurality of support rods, and all the support rods are circumferentially spaced and connected between the steel-concrete platform and the bottom connection layer. The lattice tower can evenly transfer the force of the steel-concrete platform to the bottom connection layer.

[0019] During installation, first connect the four corner columns to the lattice section, and then connect the steel tower connection concrete layer to the steel tower barrel.

[0020] With the above-mentioned steel-concrete composite structure transition section and wind power tower, since the steel-concrete platform is connected to the steel tower barrel by the steel tower connection concrete layer, and at the same time, the lattice tower can evenly transfer the force of the steel-concrete platform to the bottom connection layer, it can prevent the phenomenon that there is a large concentrated load at the top of the struts of the traditional pure lattice transition end, which leads to an unfavorable stress concentration in the upper steel tower barrel. Brief Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts are not necessarily drawn to actual scale.

[0022] Figure 1 Schematic diagram of a steel-concrete composite structure transition section provided by an embodiment of the present invention;

[0023] Figure 2 For Figure 1 Schematic diagram of the steel-concrete platform in a steel-concrete composite structure transition section shown;

[0024] Figure 3 For Figure 1 Schematic diagram of the support rod in a steel-concrete composite structure transition section shown;

[0025] Figure 4 For Figure 1 Schematic diagram of the gusset plate in a steel-concrete composite structure transition section shown;

[0026] Reference Signs:

[0027] 100, Steel-concrete platform; 110, Inner steel shell; 120, Outer steel shell; 130, Steel tower connecting concrete layer bottom connecting layer; 131, Steel shell; 132, Connecting rib plate; 133, Concrete layer; 140, Bottom plate;

[0028] 200, Bottom connecting layer; 210, Corner column; 220, Transverse connecting rod; 230, Gusset plate;

[0029] 300, Lattice tower; 310, Support rod; 320, Connecting plate; Specific embodiments

[0030] Hereinafter, embodiments of the technical solution of the present utility model will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0031] Please refer to Figures 1 to 4 , the present utility model provides a steel-concrete composite structure transition section, including a steel-concrete platform 100, a bottom connecting layer 200 and a lattice tower 300.

[0032] Specifically, the steel-concrete platform 100 includes a circular inner steel shell 110, a circular outer steel shell 120 and a steel tower connecting concrete layer 130. The outer steel shell 120 is coaxially sleeved outside the inner steel shell 110. The steel tower connecting concrete layer 130 is filled and connected between the inner steel shell 110 and the outer steel shell 120. The steel tower connecting concrete layer 130 can be connected to the steel tower barrel. In specific implementation, the steel tower connecting concrete layer 130 can be connected to the steel tower barrel by welding a connecting flange to the top of the steel tower connecting concrete layer 130 and then connecting to the bottom of the steel tower barrel through the flange.

[0033] The bottom connecting layer 200 includes four corner columns 210 and four transverse connecting rods 220. The four corner columns 210 are located below the steel-concrete platform 100 and at the four corners of the steel-concrete platform 100. The four corner columns 210 can be connected to the lattice section. In specific implementation, flange plates are welded below the four corner columns 210 and connected to the lower lattice section through the four flange plates.

[0034] The lattice tower 300 includes a plurality of support rods 310. All the support rods 310 are circumferentially spaced and connected between the steel-concrete platform 100 and the bottom connecting layer 200. The lattice tower 300 can evenly transfer the force of the steel-concrete platform 100 to the bottom connecting layer 200.

[0035] During installation, first connect the four corner columns 210 to the lattice section, and then connect the steel tower connecting concrete layer 130 to the steel tower barrel. In specific implementation, the support rods 310 can preferably be hollow circular steel pipes.

[0036] With the above steel-concrete composite structure transition section, since the steel-concrete platform 100 uses a steel tower to connect the concrete layer 130 and the steel tower barrel, and at the same time, the lattice tower 300 can evenly transfer the force of the steel-concrete platform 100 to the bottom connection layer 200, it is possible to prevent the phenomenon that there is a large concentrated load at the top of the traditional pure lattice transition end strut, which leads to an unfavorable stress concentration in the upper steel tower barrel.

[0037] In this embodiment, the steel tower connecting the concrete layer 130 includes an intermediate steel shell 131, connecting rib plates 132 and a concrete layer 133. The intermediate steel shell 131 is located between the inner steel shell 110 and the outer steel shell 120. There are multiple connecting rib plates 132, and the multiple connecting rib plates 132 are circumferentially spaced and connected between the inner steel shell 110 and the intermediate steel shell 131, and between the intermediate steel shell 131 and the outer steel shell 120. The adjacent two connecting rib plates 132 are filled with the concrete layer 133, and the top of the intermediate steel shell 131 is higher than the inner steel shell 110 and the outer steel shell 120, and the top of the intermediate steel shell 131 can be connected to the steel tower barrel.

[0038] During use, the flange can be welded to the top of the intermediate steel shell 131 and then connected to the upper steel tower barrel. With this structure, it is convenient to connect the steel tower barrel, and at the same time, the connecting rib plates 132 and the filled concrete layer 133 can evenly transfer the external force from the upper steel tower barrel to the lattice tower 300.

[0039] As a preferred embodiment, a plurality of stud bolts can be spacedly arranged on the outer wall of the inner steel shell 110, the inner wall of the outer steel shell 120, the inner and outer walls of the intermediate steel shell 131, and both sides of the connecting rib plates 132. The stud bolt spacing is 100 mm, which can ensure good connection between the concrete and the steel.

[0040] As a preferred embodiment, the steel-concrete platform 100 further includes a bottom plate 140. The inner steel shell 110, the outer steel shell 120 and the steel tower connecting the concrete layer 130 are all arranged on the bottom plate 140. Through the setting of the bottom plate 140, it is convenient for the pouring of the concrete and at the same time convenient for connection with the lattice tower 300. In addition, through the bottom plate 140, the force of the steel-concrete platform 100 can be further evenly distributed, facilitating the uniform downward transfer of the force of the steel-concrete platform 100.

[0041] In this embodiment, the support rods 310 are divided into four groups, and the four groups of support rods 310 are circumferentially spaced and arranged. Specifically, each group of support rods 310 includes three support rods 310. The two ends of the middle support rod 310 are respectively connected to the steel-concrete platform 100 and the corner column 210. The other two support rods 310 are relatively located on the left and right sides of the middle support rod 310, and the two ends of these two support rods 310 are respectively connected to the steel-concrete platform 100 and the corresponding transverse connecting rod 220.

[0042] With this structure, during use, the force from the steel-concrete platform 100 is evenly transmitted to the bottom connection layer 200 through 12 support rods 310. Since the four corner columns 210 and the four transverse connecting rods 220 are all stressed, the situation where all the forces are concentrated on the corner columns 210 can be prevented.

[0043] As a preferred embodiment, the lattice tower 300 further includes a plurality of gusset plates 230, which are respectively fixed to the steel-concrete platform 100, the corner columns 210 or the transverse connecting rods 220. Connecting plates 320 are provided at both ends of each support rod 310, and the two ends of the support rod 310 are detachably connected to the corresponding gusset plates 230 through the connecting plates 320.

[0044] In addition, the present utility model also provides a wind power tower, which includes the above-mentioned steel-concrete combined structure transition section, and also includes a steel tower barrel and a lattice section, and the steel-concrete combined structure transition section is connected between the steel tower barrel and the lattice section.

[0045] The above-mentioned steel-concrete combined structure transition section has the following advantages:

[0046] 1. By welding with the top of the intermediate steel shell 131 through a flange, it is convenient to connect with the upper steel tower barrel. At the same time, since the connecting rib plates 132 and the filled concrete layer 133 can evenly transmit the external force from the upper steel tower barrel to the bottom plate 140, and the bottom plate 140 then evenly transmits the force to the lattice tower 300; the phenomenon that there is a large concentrated load at the top of the support rods of the traditional pure lattice transition end and the upper steel tower barrel will have an unfavorable stress concentration can be prevented.

[0047] 2. Since the 12 support rods 310 can evenly transmit the force on the bottom plate 140 to the bottom connection layer 200, the situation where all the forces are concentrated on the corner columns 210 can be prevented.

[0048] 3. Through the arrangement of the gusset plates 230, it is convenient for the assembly of the entire transition section;

[0049] 4. The entire transition section has a simple structure, which can reduce the number of parts and processing costs at the same time.

[0050] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model.

Claims

1. A steel-concrete composite structure transition section, characterized in that: include: A steel-concrete platform, the steel-concrete platform comprises a circular inner steel shell, a circular outer steel shell and a steel tower connection concrete layer, the outer steel shell is coaxially sleeved outside the inner steel shell, the steel tower connection concrete layer is filled and connected between the inner steel shell and the outer steel shell, and the steel tower connection concrete layer can be connected to the steel tower barrel; A bottom connection layer, comprising four corner columns and four transverse connection rods, wherein the four corner columns are located below the steel-concrete platform and at four corners of the steel-concrete platform, and the four corner columns can be connected to the lattice segments; and The lattice tower comprises a plurality of support rods, all of which are connected between the steel concrete platform and the bottom connection layer at circumferential intervals. The lattice tower can evenly transfer the force of the steel concrete platform to the bottom connection layer.

2. The steel-concrete composite structure transition section according to claim 1 is characterized in that: The steel tower connecting concrete layer includes an intermediate steel shell, connecting ribs and a concrete layer. The intermediate steel shell is located between the inner steel shell and the outer steel shell. There are multiple connecting ribs, and the multiple connecting ribs are connected circumferentially between the inner steel shell and the intermediate steel shell, and between the intermediate steel shell and the outer steel shell. Two adjacent connecting ribs are filled with the concrete layer, and the top of the intermediate steel shell is higher than the inner steel shell and the outer steel shell. The top of the intermediate steel shell can be connected to the steel tower.

3. The steel-concrete composite structure transition section according to claim 2 is characterized in that: A plurality of bolts are arranged at intervals on the outer wall of the inner steel shell, the inner wall of the outer steel shell, the inner and outer walls of the middle steel shell and both sides of the connecting ribs.

4. The steel-concrete composite structure transition section according to claim 1 or 2, characterized in that: The steel-concrete platform also includes a bottom plate, and the inner steel shell, the outer steel shell and the steel tower connection concrete layer are all arranged on the bottom plate.

5. The steel-concrete composite structure transition section according to claim 1 is characterized in that: The support rods are divided into four groups, and the four groups of support rods are arranged at circumferential intervals.

6. The steel-concrete composite structure transition section according to claim 5 is characterized in that: Each group of support rods includes three support rods, the two ends of the middle support rod are respectively connected to the steel concrete platform and the corner column, and the other two support rods are relatively located on the left and right sides of the middle support rod, and the two ends of these two support rods are respectively connected to the steel concrete platform and the corresponding transverse connecting rod.

7. The steel-concrete composite structure transition section according to claim 1 or 6, characterized in that: The lattice tower also includes a plurality of node plates, which are respectively fixed to the steel-concrete platform, corner columns or transverse connecting rods. Connecting plates are provided at both ends of each support rod, and the two ends of the support rod are detachably connected to the corresponding node plates through the connecting plates.

8. A wind power generation tower, characterized in that: It comprises the steel-concrete composite structure transition section as described in any one of claims 1 to 7, and also comprises a steel tower and a lattice section, wherein the steel-concrete composite structure transition section is connected between the steel tower and the lattice section.

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