High-conductivity steel-cored aluminum stranded wire

Abstract

The utility model relates to a high electric conductivity steel core aluminium stranded conductor, relate to steel core aluminium stranded conductor device field, including composite steel core and aluminium wire stranding layer, aluminium wire stranding layer cladding composite steel core outside, aluminium wire stranding layer is equipped with at least three layers, and the layer number of aluminium wire stranding layer is odd, and the stranding direction of two adjacent aluminium wire stranding layer is opposite, composite steel core includes single steel composite core, single steel composite core is equipped with several, and several single steel composite core is made into composite steel core through stranding, single steel composite core includes single steel core and torque buffer high temperature polymerization insulation wire, torque buffer high temperature polymerization insulation wire is equipped with several, several torque buffer high temperature polymerization insulation wire is stranding in the outside of single steel core, beneficial effect: prevent the stress concentration of too big torque caused by the coiling stress in the process of paying off wire, and then avoid the local damage of steel core aluminium stranded conductor, improve the efficiency of paying off wire operation.

Description

Technical Field

[0001] This utility model relates to the technical field of steel-cored aluminum stranded wire devices, and in particular to a high conductivity steel-cored aluminum stranded wire. Background Technology

[0002] As is commonly known, steel-cored aluminum stranded wire refers to a reinforced conductor in which single or multiple layers of aluminum strands are stranded around a galvanized steel core. It is primarily used in the power and transmission line industries. Its internal structure consists of a steel core, with aluminum wires twisted around it. The steel core mainly serves to increase strength, while the aluminum strands primarily transmit electrical energy.

[0003] Chinese patent CN220962883U describes a high-conductivity steel-cored aluminum stranded cable, comprising a steel core layer and an aluminum stranded layer. The steel core layer contains filler ropes, the steel core surface has a first sheathing layer, and the aluminum stranded layer has a second sheathing layer. However, in practical use, the following problems still exist:

[0004] For ease of transport, steel-cored aluminum stranded wire needs to be wound on a reel and transported together with the reel. When it is needed, the steel-cored aluminum stranded wire is pulled out of the reel for construction. During the process of pulling out the steel-cored aluminum stranded wire while it is still wound on the reel, the winding stress generates excessive torque. This torque cannot be buffered and transitioned, resulting in stress concentration and causing local damage to the steel-cored aluminum stranded wire.

[0005] Therefore, a high conductivity steel-cored aluminum stranded wire is proposed. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a high conductivity steel-cored aluminum stranded wire.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A high-conductivity steel-cored aluminum stranded wire includes a composite steel core and an aluminum wire stranded layer. The aluminum wire stranded layer covers the outside of the composite steel core. The aluminum wire stranded layer has at least three layers, and the number of layers is odd. The stranding directions of two adjacent aluminum wire stranded layers are opposite. The composite steel core includes a single steel composite core, and there are several single steel composite cores. The several single steel composite cores are stranded together to form the composite steel core. The single steel composite core includes a single steel core and a torque-buffered high-temperature polymer insulated wire. There are several torque-buffered high-temperature polymer insulated wires, and the several torque-buffered high-temperature polymer insulated wires are stranded on the outside of the single steel core.

[0009] The torque-buffered high-temperature polymer insulated wire includes a corrugated insulating tube and a supporting rib. The supporting rib is located at the narrow neck of the corrugated insulating tube and is fixedly connected to the inner wall of the corrugated insulating tube.

[0010] The supporting rib includes a supporting ring and an arc-shaped supporting plate. Several arc-shaped supporting plates are provided and are evenly distributed circumferentially along the axis of the supporting ring. One end of the arc-shaped supporting plate is fixedly connected to the outer wall of the supporting ring, and the other end of the arc-shaped supporting plate is fixedly connected to the inner wall of the corrugated insulating tube.

[0011] A first lubricating layer is provided between the composite steel core and the innermost aluminum wire stranded layer.

[0012] The innermost stranded aluminum wire layer is stranded in the opposite direction to the composite steel core.

[0013] A protective tube is provided on the aluminum wire stranded layer, and the protective tube covers the outermost aluminum wire stranded layer.

[0014] A second lubricating layer is provided between the protective tube and the outermost stranded aluminum wire layer.

[0015] Compared with the prior art, this utility model has the following beneficial effects: The composite steel core is made by stranding multiple single steel composite cores, and each single steel composite core consists of a single steel core and multiple corrugated insulating tubes with support ribs at narrow necks stranded around it. Combined with an odd number of layers of aluminum wire stranded in alternating stranding directions, the torque generated by winding stress is buffered and transitioned, preventing stress concentration caused by excessive torque during the winding process, thus avoiding localized damage to the steel-cored aluminum stranded wire and improving the efficiency of the laying operation. Furthermore, by stranding multiple single steel composite cores to form a composite steel core, each single steel composite core consists of multiple hollow torque-buffering high-temperature polymer insulating wires stranded around it, thereby improving the overall structural toughness and thus enhancing the mechanical strength of the steel-cored aluminum stranded wire. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of the aluminum wire stranded layer of this utility model;

[0018] Figure 3 This is a front view of the structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the torque-buffered high-temperature polymer insulated wire of this utility model;

[0020] Figure 5This is a front view structural schematic diagram of the torque-buffered high-temperature polymer insulated wire of this utility model;

[0021] Figure 6 This is a side view of the three-dimensional cross-sectional structure of the torque-buffered high-temperature polymer insulated wire of this utility model.

[0022] 1. Composite steel core; 2. Aluminum wire stranded layer; 3. Single steel core; 4. Torque buffer high-temperature polymer insulation wire; 5. First lubrication layer; 6. Protective tube; 7. Second lubrication layer; 8. Corrugated insulation tube; 9. Support ring; 10. Arc-shaped support plate. Detailed Implementation

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0024] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, in part of which will be obvious from the description or may be learned by practice of the invention.

[0025] like Figure 1-3 As shown, a high conductivity steel-cored aluminum stranded wire includes a composite steel core 1 and an aluminum wire stranded layer 2. The aluminum wire stranded layer 2 covers the outside of the composite steel core 1. The aluminum wire stranded layer 2 has at least three layers, and the number of layers of the aluminum wire stranded layer 2 is odd. The stranding directions of two adjacent aluminum wire stranded layers 2 are opposite. The composite steel core 1 includes a single steel composite core, and there are several single steel composite cores. The several single steel composite cores are stranded to form the composite steel core 1. The single steel composite core includes a single steel core 3 and a torque-buffered high-temperature polymer insulated wire 4. There are several torque-buffered high-temperature polymer insulated wires 4. The several torque-buffered high-temperature polymer insulated wires 4 are stranded on the outside of the single steel core 3.

[0026] like Figure 4-6 As shown, the torque-buffered high-temperature polymer insulated wire 4 includes a corrugated insulating tube 8 and a support rib. The support rib is located at the narrow neck of the corrugated insulating tube 8 and is fixedly connected to the inner wall of the corrugated insulating tube 8.

[0027] like Figure 4-6As shown, the support rib includes a support ring 9 and an arc-shaped support plate 10. Several arc-shaped support plates 10 are provided and are evenly distributed circumferentially along the axis of the support ring 9. One end of the arc-shaped support plate 10 is fixedly connected to the outer wall of the support ring 9, and the other end of the arc-shaped support plate 10 is fixedly connected to the inner wall of the corrugated insulating tube 8.

[0028] like Figure 1-3 As shown, a first lubricating layer 5 is provided between the composite steel core 1 and the innermost aluminum wire stranded layer 2.

[0029] like Figure 2 As shown, the innermost aluminum wire stranded layer 2 is stranded in the opposite direction to the composite steel core 1.

[0030] like Figure 1-3 As shown, a protective tube 6 is provided on the aluminum wire stranded layer 2, and the protective tube 6 covers the outside of the outermost aluminum wire stranded layer 2.

[0031] like Figure 2-3 As shown, a second lubricating layer 7 is provided between the protective tube 6 and the outermost aluminum wire stranded layer 2.

[0032] The work process is as follows:

[0033] S1, when the steel-cored aluminum stranded wire is pulled out of the spool, since the composite steel core 1 is made of multiple single steel composite cores twisted together, and each single steel composite core is composed of a single steel core 3 and multiple hollow torque-buffered high-temperature polymer insulated wires 4 twisted together outside, during the pulling process, the torque generated by the stress of the single steel core 3 compresses or stretches the corrugated insulating tube 8 outside. The crest and trough structure of the corrugated insulating tube 8 can transform the concentrated point stress into surface stress distributed in a region, thereby avoiding torque concentration. Support ribs are set at the narrow neck inside the corrugated insulating tube 8. The support ribs are composed of support rings 9 and circumferentially evenly distributed arc-shaped support plates 10. The circumferentially evenly distributed arc-shaped support plates 10 directly The buffer single steel core 3 buffers the torque generated by the high-temperature polymer insulated wire 4, while limiting the maximum deformation of the corrugated insulation tube 8 to prevent it from over-deforming and failing. The aluminum wire stranded layer 2 is set to an odd number of layers. The torque generated by the internal stress of the outermost and innermost aluminum wire stranded layers 2 is in the same direction, while the torque generated by the middle aluminum wire stranded layer 2 is in the opposite direction to that of the innermost and outermost layers. This achieves overall torque self-balancing of the aluminum wire stranded layer 2. This structure allows the aluminum wire stranded layer 2 to slowly transition torque during relative sliding, preventing stress concentration caused by excessive torque due to winding stress during the wire laying process. This avoids local damage to the steel-cored aluminum stranded wire and improves the efficiency of the wire laying operation.

[0034] S2, in the process of use, in response to the problem of poor toughness of the single steel core 3 material itself, multiple single steel composite cores are twisted together to form a composite steel core 1. Each single steel composite core is composed of multiple hollow torque buffer high-temperature polymer insulated wires 4 twisted around the single steel core 3. This structure increases the gap between the single steel cores 3, allowing each single steel core 3 to produce a certain displacement and deformation when bent. At the same time, thanks to the elastic material properties of the torque buffer high-temperature polymer insulated wires 4, the deformation of the single steel core 3 can be effectively coordinated and transitioned, thereby improving the toughness of the overall structure and thus improving the mechanical strength of the steel-cored aluminum stranded wire.

[0035] By setting a first lubricating layer 5 between the composite steel core 1 and the innermost aluminum wire stranded layer 2, and setting a second lubricating layer 7 between the protective tube 6 and the outermost aluminum wire stranded layer 2, the relative sliding between the composite steel core 1 and the aluminum wire stranded layer 2 is effectively promoted, and the stress transition and release effect is further optimized.

[0036] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A high conductivity steel-cored aluminum stranded wire, comprising a composite steel core (1) and an aluminum wire stranded layer (2), wherein the aluminum wire stranded layer (2) covers the outside of the composite steel core (1), characterized in that: The aluminum wire stranded layer (2) has at least three layers, and the number of layers of the aluminum wire stranded layer (2) is odd. The stranding directions of two adjacent aluminum wire stranded layers (2) are opposite. The composite steel core (1) includes a single steel composite core. The single steel composite core has several strands, and the several strands of the single steel composite core are stranded to form the composite steel core (1). The single steel composite core includes a single steel core (3) and a torque buffer high-temperature polymer insulated wire (4). The torque buffer high-temperature polymer insulated wire (4) has several strands, and the several strands of the torque buffer high-temperature polymer insulated wire (4) are stranded on the outside of the single steel core (3).

2. The high conductivity steel-cored aluminum stranded wire according to claim 1, characterized in that: The torque-buffered high-temperature polymer insulated wire (4) includes a corrugated insulating tube (8) and a supporting rib. The supporting rib is located at the narrow neck of the corrugated insulating tube (8) and is fixedly connected to the inner wall of the corrugated insulating tube (8).

3. The high conductivity steel-cored aluminum stranded wire according to claim 2, characterized in that: The supporting rib includes a supporting ring (9) and an arc-shaped supporting plate (10). There are several arc-shaped supporting plates (10), and the arc-shaped supporting plates (10) are evenly distributed circumferentially along the axis of the supporting ring (9). One end of the arc-shaped supporting plate (10) is fixedly connected to the outer wall of the supporting ring (9), and the other end of the arc-shaped supporting plate (10) is fixedly connected to the inner wall of the corrugated insulating tube (8).

4. The high conductivity steel-cored aluminum stranded wire according to claim 2, characterized in that: A first lubricating layer (5) is provided between the composite steel core (1) and the innermost aluminum wire stranded layer (2).

5. The high conductivity steel-cored aluminum stranded wire according to claim 4, characterized in that: The innermost aluminum wire stranded layer (2) is stranded in the opposite direction to the composite steel core (1).

6. The high conductivity steel-cored aluminum stranded wire according to claim 2, characterized in that: The aluminum wire stranded layer (2) is provided with a protective tube (6), which covers the outermost aluminum wire stranded layer (2).

7. The high conductivity steel-cored aluminum stranded wire according to claim 6, characterized in that: A second lubricating layer (7) is provided between the protective tube (6) and the outermost aluminum wire stranded layer (2).

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