Stranded carbon fiber composite core soft aluminum wire and fabrication method thereof

Abstract

The invention discloses a stranded carbon fiber composite core soft aluminum wire and a fabrication method thereof. The stranded carbon fiber composite core soft aluminum wire comprises a wire core and a conductive layer wrapping the wire core, wherein the wire core comprises a carbon fiber main core and a plurality of carbon fiber auxiliary cores which are spirally and tightly stranded at the outer side of the carbon fiber main core, and the conductive layer comprises at least one soft aluminum wire layer, the soft aluminum wire layer comprises a plurality of soft aluminum wires which are spirally and tightly stranded at the outer side of the wire core. Since the wire core consisting of the carbon fiber main core and the plurality of carbon fiber auxiliary cores stranded at the outer side of the carbon fiber main core serves as a bearing aggregate of the whole wire and replaces a single carbon fiber (bar-shaped) composite core in the traditional structure, the stranded carbon fiber composite core soft aluminum wire had good flexibility, and smooth progress of engineering can be guaranteed; at the same time, the stranded carbon fiber composite core soft aluminum wire has favorable sag performance and is more suitable for an extra-large span line; in addition, due to improvement of the structural strength and flexibility of the wire core, a crimp-type tension fitting can be adopted and has better safety and construction convenience than a wedge locking type tension fitting adopted by the soft aluminum wire of the single carbon fiber (bar-shaped) composite core.

Description

technical field [0001] The invention is used in the field of overhead cables, and in particular relates to a stranded carbon fiber composite core annealed aluminum conductor and a manufacturing method thereof. Background technique [0002] Traditional power transmission is carried out through steel-cored aluminum conductors. Since such conductors are greatly affected by temperature during power transmission, sag problems will occur. At present, there is a new type of carbon fiber composite core conductor, which is composed of most carbon fibers. , compounded with a resin base material composed of various substances, the wire core is wrapped by a conductor, because this wire core has a higher elastic modulus and a lower thermal expansion coefficient, it can increase the ampacity of the wire, not only Large power transmission, high temperature resistance, no obvious sag, good use effect and long life. It can be said that this is the development trend of power transmission wire...

AI Technical Summary

Problems solved by technology

Due to the limitation of its rod-shaped carbon core structure and performance, the production area can only be less than 90mm 2 (diameter less than 10.6mm) carbon fiber composite core, the maximum specification of the wire produced by it is: 1389 / 87, that is: the area of ​​the aluminum core is: 1389mm 2 , carbon core area: 87mm 2 , the maximum breaking force is: 266.4kN, the weight is: 4022kg / km, and its tension-to-weight ratio is: (266.4*1000 / 9.80665) / 4022=6.75, and its sagging performance cannot meet the needs of some specific projects

At the same time, the tension fittings used in the existing rod-shaped carbon fiber annealed aluminum conductors are wedge-shaped structures, and the safety cannot be guaranteed under temperature or wind conditions.

In addition, the rod-shaped carbon core structure used in the existing rod-shaped carbon fiber soft aluminum large-scale wire has very poor flexibility, which makes it difficult to ensure the smooth progress of the project

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