Steering cast steel joint and lattice type wind power tower

Abstract

The steering cast steel joint comprises a connecting bent pipe, a clamping structure and a bearing platform structure, an inserting channel used for installing a steel strand is formed in the connecting bent pipe, and the inner diameter of the inserting channel is larger than the outer diameter of the steel strand; the clamping structure is mounted on the steel strand; and the clamping structure is suitable for being clamped on the bearing platform structure to limit the steel strand, so that a mounting gap is formed between the steel strand and the inner wall of the insertion channel. The structure ensures that a mounting gap is formed between the steel strand and the inner wall of the insertion channel, the situation that friction is generated between the steel strand and the inner wall of the insertion channel, and consequently a coating on the surface of the steel strand is abraded is avoided, and the durability of the steel strand is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast steel nodes, in particular to a steering cast steel node and a lattice-type wind power tower. Background Art

[0002] A node refers to a structure used to connect steel pipes in some large steel structure projects. With the rapid development of steel structures, steel structures are widely used in projects with large spans and complex shapes, such as lattice wind turbine towers, sports centers, subways, stations, theaters, museums, and large convention and exhibition centers.

[0003] The corner columns of the lattice-type composite structure wind turbine tower need to be set with turning points at the blade tips. However, the prestressed steel strands tensioned inside the corner columns and the outer steel pipes are in contact with each other at the turning points. Long-term repeated contact will wear the surface coating of the steel strands and reduce the durability of the steel strands. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is that the corner columns of the lattice-type composite structure wind turbine tower need to be provided with a turning point at the blade tip. However, the prestressed steel strands tensioned inside the corner columns and the outer steel pipes are in contact with each other at the turning point. Long-term repeated contact will wear the surface coating of the steel strands and reduce the durability of the steel strands.

[0005] To this end, the utility model provides a steering cast steel node, comprising:

[0006] A connecting elbow, wherein an insertion channel for installing a steel strand is formed in the connecting elbow, and the inner diameter of the insertion channel is larger than the outer diameter of the steel strand;

[0007] A clamping structure, the clamping structure being mounted on the steel strand;

[0008] A support structure is further provided on the inner wall of the insertion channel, and the clamping structure is suitable for clamping the upper limit steel strand on the support structure so that there is an installation gap between the steel strand and the inner wall of the insertion channel.

[0009] Optionally, the connecting elbow includes:

[0010] a first installation pipe, wherein a first installation channel is defined in the first installation pipe;

[0011] a second installation pipe, wherein a second installation channel is defined in the second installation pipe, the second installation pipe is connected to the first installation pipe, and the first installation channel and the second installation channel are connected to form an insertion channel;

[0012] Wherein, an extension line of the axis of the first installation channel intersects with an extension line of the axis of the second installation channel.

[0013] Optionally, the above-mentioned support structure includes: a first conversion support and a second conversion support, the first conversion support is installed on the inner wall of the first installation pipe; the second conversion support is installed on the inner wall of the second installation pipe.

[0014] Optionally, the first conversion platform and the second conversion platform are annular, and the inner diameter of the first conversion platform is larger than the inner diameter of the second conversion platform.

[0015] Optionally, the central axis of the first conversion platform coincides with the axis of the first installation channel;

[0016] The central axis of the second conversion platform coincides with the axis of the second installation channel.

[0017] Optionally, an annular mounting groove is provided on the inner side of the second conversion base near one end of the first conversion base.

[0018] Optionally, the above-mentioned clamping structure includes a first clamp and a second clamp sequentially mounted on the steel strand, the first clamp can be abutted against the first conversion support and the second clamp can be clamped in the installation groove to limit the steel strand.

[0019] Optionally, the above-mentioned clamping structure further includes a connecting wire, one end of which is fixed to the first clamp, and the other end of which is fixed to the second clamp.

[0020] Optionally, both ends of the connecting elbow are further provided with assembly parts, and the thickness of the assembly parts is greater than the thickness of the connecting elbow.

[0021] A lattice-type wind power tower comprises an external pipeline and the above-mentioned steering cast steel node, wherein the external pipeline is sleeved outside the steering cast steel node, and filler is used to fill the space between the external pipeline and the steering cast steel node.

[0022] The technical solution provided by the utility model has the following advantages:

[0023] 1. The steering cast steel node provided by the utility model includes: a connecting bend, a clamping structure and a base structure, wherein the connecting bend is provided with an insertion channel for installing a steel strand, and the inner diameter of the insertion channel is larger than the outer diameter of the steel strand; the clamping structure is installed on the steel strand; the clamping structure is suitable for clamping the steel strand on the base structure to limit the position so that there is an installation gap between the steel strand and the inner wall of the insertion channel.

[0024] This structure ensures that there is an installation gap between the steel strand and the inner wall of the insertion channel, preventing friction between the steel strand and the inner wall of the insertion channel from causing wear on the surface coating of the steel strand, thereby improving the durability of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a cross-sectional view of the hollow sandwich steel tube concrete component of the lattice wind power tower provided in the utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the steering cast steel node provided in the present utility model;

[0028] Description of reference numerals:

[0029] 1 - connecting elbow; 11 - first installation pipe; 111 - first installation channel; 12 - second installation pipe; 121 - second installation channel; 13 - assembly part;

[0030] 2-Steel strand;

[0031] 3-clamping structure; 31-first buckle; 32-second buckle; 33-connecting wire;

[0032] 4-support structure; 41-first conversion support; 42-second conversion support;

[0033] 5- peripheral pipeline;

[0034] 6-Padding. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1

[0040] This embodiment provides a steering cast steel node, such as Figures 1 to 2 As shown, it includes a connecting elbow 1, a clamping structure 3 and a support structure 4.

[0041] like Figure 2 As shown, the connecting elbow 1 is bent and has a turning area. The connecting elbow 1 includes a first installation pipe 11 and a second installation pipe 12, which are connected together at an obtuse angle. A first installation channel 111 is defined within the first installation pipe 11, and a second installation channel 121 is defined within the second installation pipe 12. The first installation channel 111 and the second installation channel 121 have the same inner diameter, and the first installation channel 111 and the second installation channel 121 are connected to form an insertion channel for installing the steel strand 2. The extension line of the axis of the first installation channel 111 intersects the extension line of the axis of the second installation channel 121.

[0042] like Figure 2As shown, the support structure 4 includes a first conversion support 41 and a second conversion support 42. The first conversion support 41 is annular and is mounted on the inner wall of the first mounting pipe 11. The axis of the first conversion support 41 coincides with the axis of the first mounting channel 111. The second conversion support 42 is also annular and is mounted on the inner wall of the second mounting pipe 12. The central axis of the second conversion support 42 coincides with the axis of the second mounting channel 121. With the axis of the second mounting channel 121 as the center, an annular mounting groove is provided on the inner side of the second conversion support 42, near one end of the first conversion support 41. The inner diameter of the first conversion support 41 is larger than the inner diameter of the second conversion support 42, and the inner diameter of the first conversion support 41 is larger than the inner diameter of the mounting groove.

[0043] like Figure 2 As shown, the clamping structure 3 includes a first clamp 31 and a second clamp 32. The first clamp 31 and the second clamp 32 are both annular members. The first clamp 31 and the second clamp 32 are mounted along the installation direction and welded to the steel strand 2. For example, in this embodiment, the installation direction is from top to bottom, so the first clamp 31 is installed at the top and the second clamp 32 is installed at the bottom. The outer diameter of the first clamp 31 is larger than the inner diameter of the first conversion base 41 and smaller than the inner diameter of the first installation channel 111. The outer diameter of the second clamp 32 is smaller than the inner diameter of the first conversion base 41, larger than the inner diameter of the second conversion base 42, and smaller than the inner diameter of the installation slot. Before the first clamp 31 and the second clamp 32 are welded to the steel strand 2, they can be fixed in place using connecting wires 33. Specifically, multiple connecting wires 33 are used, with the upper ends of the connecting wires 33 passing through the first clamp 31 and fixed thereto, and the lower ends of the connecting wires 33 passing through the second clamp 32 and fixed thereto. The fixing can be achieved by welding. Through the above-mentioned arrangement, on the one hand, the clamping structure 3 can be pre-assembled according to the position and shape of the base structure 4, and can be directly installed on the appropriate position of the steel strand 2 to improve construction efficiency. On the other hand, through-welding fixation can prevent the connecting wire 33 from touching the steel strand 2 or the inner wall of the connecting elbow 1 during the installation process, causing scratches and damage.

[0044] When the steel strand 2 needs to be installed into the insertion channel, first fix the first clip 31 and the second clip 32 through the connecting wire 33, and put them on the steel strand 2, and fix the first clip 31 and the second clip 32 to the steel strand 2 by welding; then, continue to insert the steel strand 2 into the insertion channel along the installation direction, and the steel strand 2 enters the insertion channel together with the first clip 31 and the second clip 32; the second clip 32 moves in the first installation channel 111, passes through the inner hole of the first conversion base 41, and enters the second installation channel 121. As it continues to extend, the second clip 32 will be locked in the installation groove, and at this time the first clip 31 will abut the surface of the first conversion base 41. The displacement control of the second clip 32 along the axial direction and radial direction of the second installation channel 121 is achieved through the second clip 32 and the second conversion base 42; the size of the first clip 31 is relatively large, and when the steel strand 2 passes through the two clips from top to bottom, two turns are achieved, that is, after the installation is completed, the displacement deviation between the first clip 31 and the second clip 32 causes the steel strand 2 to have a first turning angle; the second conversion base 42 is inclined, and the second clip 32 is inclined and clamped on the second conversion base 42, causing the steel strand 2 to have a second turning angle, and the sum of the two turning angles is the designed turning angle between the first installation pipe 11 and the second installation pipe 12.

[0045] Through the above structure, the inner diameters of the first conversion platform 41 and the second conversion platform 42 are designed, so that the installation of the first clip 31 and the second clip 32 on the prestressed steel strand 2 is quick and convenient. The design of the upper and lower platforms and the two clips avoids the situation where the prestressed steel strand 2 is damaged due to excessive turning angle at one time; the second conversion platform 42 is designed in a stepped two-stage manner by providing an installation groove, which achieves good limiting of the second clip 32. It also ensures that there is an installation gap between the steel strand 2 and the inner wall of the insertion channel to prevent friction between the steel strand 2 and the inner wall of the insertion channel from causing wear on the surface coating of the steel strand 2, thereby improving the durability of the steel strand 2.

[0046] In this embodiment, if Figure 2 As shown, the first installation pipe 11, the second installation pipe 12 and the base structure 4 are integrally formed of cast steel, with high dimensional control accuracy, no deformation caused by welding, and guaranteed structural strength; there are no welds inside the nodes, which reduces fatigue at the nodes.

[0047] In this embodiment, if Figure 2 As shown, the upper and lower ends of the connecting elbow 1 also need to be welded to the adjacent steel pipes. The upper and lower ends of the connecting elbow 1 are provided with assembly parts 13. The assembly part 13 increases the pipe wall thickness by slope, ensuring that its thickness is greater than the thickness of the connecting elbow 1. It can be applied to adjacent steel pipes of different thicknesses, realizes effective welding with adjacent steel pipes of different thicknesses, and improves the standardization of the nodes.

[0048] Example 2

[0049] This embodiment provides a lattice-type wind turbine tower, such as Figure 1 As shown, the lattice wind turbine tower in Example 2 includes an external pipe 5 and the steering cast steel node in Example 1. Adjacent pipes are welded to both ends of the steering cast steel node. The adjacent pipes and the steering cast steel node form an inner tube, and the external pipe 5 is sleeved outside the inner tube. The gaps between the external pipe 5 and the steering cast steel node, as well as between the external pipe 5 and the adjacent pipes at both ends of the steering cast steel node, are filled with concrete filler 6. The lattice wind turbine tower in Example 2 includes the steering cast steel node in Example 1, and thus has all of its benefits.

[0050] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A steering cast steel node, characterized in that: include: A connecting elbow (1), wherein an insertion channel for installing a steel strand (2) is provided in the connecting elbow (1), and the inner diameter of the insertion channel is larger than the outer diameter of the steel strand (2); A clamping structure (3), the clamping structure (3) being mounted on the steel strand (2); A support structure (4) is further provided on the inner wall of the insertion channel, and the clamping structure (3) is suitable for clamping the upper limit of the steel strand (2) on the support structure (4) so ​​that there is an installation gap between the steel strand (2) and the inner wall of the insertion channel.

2. The steering cast steel node according to claim 1, characterized in that: The connecting elbow (1) comprises: A first installation pipe (11), wherein a first installation channel (111) is provided in the first installation pipe (11); a second installation pipe (12), wherein a second installation channel (121) is provided in the second installation pipe (12), the second installation pipe (12) is connected to the first installation pipe (11), and the first installation channel (111) and the second installation channel (121) are connected to form an insertion channel; Wherein, an extension line of the axis of the first installation channel (111) intersects an extension line of the axis of the second installation channel (121).

3. The steering cast steel node according to claim 2, characterized in that: The support structure (4) comprises: a first conversion support (41) and a second conversion support (42), wherein the first conversion support (41) is mounted on the inner wall of the first installation pipe (11); and the second conversion support (42) is mounted on the inner wall of the second installation pipe (12).

4. The steering cast steel node according to claim 3, characterized in that: The first conversion platform (41) and the second conversion platform (42) are annular, and the inner diameter of the first conversion platform (41) is larger than the inner diameter of the second conversion platform (42).

5. The steering cast steel node according to claim 4, characterized in that: The central axis of the first conversion support (41) coincides with the axis of the first installation channel (111); The central axis of the second conversion support platform (42) coincides with the axis of the second installation channel (121).

6. The steering cast steel node according to claim 4, characterized in that: An annular mounting groove is provided on the inner side of the second conversion support platform (42) close to one end of the first conversion support platform (41).

7. The steering cast steel node according to claim 6, characterized in that: The clamping structure (3) comprises a first clamp (31) and a second clamp (32) which are sequentially sleeved on the steel strand (2); the first clamp (31) can abut against the first conversion support (41) and the second clamp (32) can be clamped in the installation groove to limit the steel strand (2).

8. The steering cast steel node according to claim 7, characterized in that: The clamping structure (3) further comprises a connecting wire (33), one end of the connecting wire (33) is fixed to the first clamp (31), and the other end is fixed to the second clamp (32).

9. The steering cast steel node according to any one of claims 1 to 8, characterized in that: Both ends of the connecting elbow (1) are further provided with assembly parts (13), and the thickness of the assembly parts (13) is greater than the thickness of the connecting elbow (1).

10. A lattice wind power tower, characterized in that: It comprises an external pipe (5) and a steering cast steel node according to any one of claims 1 to 9, wherein the external pipe (5) is sleeved outside the steering cast steel node, and a filler (6) is used to fill the space between the external pipe (5) and the steering cast steel node.

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