Sheath fire-resistant wire and cable

Abstract

The invention belongs to the technical field of wires and cables, and particularly relates to a sheath fire-resistant wire and cable. Aiming at the problems that the existing traditional fireproof cable cannot meet the current situation, the manufacturing process is complex, the production cost is high, and the practical application is not facilitated. A scheme is proposed as follows: the sheath fireproof wire and cable comprises a supporting framework, conductors, a flame-retardant layer and a sheath; the supporting framework is located at the center of the cable, and the supporting frameworkis an elastic framework; a plurality of conductors are arranged and are uniformly distributed along the supporting framework as the circle center; an insulating layer is arranged on the outside of the conductors; the insulating layer, the conductors and the framework form an inner core of the cable; the outer part of the inner core is provided with a steel wire armor layer, and the outer part ofthe steel wire armor layer is wrapped with an isolation sleeve; a plurality of flame retardant layers are arranged outside the isolation sleeve; a sheath is arranged outside the flame retardant layers; and a hollow cavity is formed among the flame retardant layers, the sheath and the isolation sleeve. The cable is simple in structure, high in thermal insulation effect and high in flame retardancy.

Description

technical field [0001] The invention relates to the technical field of wires and cables, in particular to a sheathed fire-resistant wire and cable. Background technique [0002] At present, with the rapid development of the electric power industry, the use of wires and cables has risen sharply. In 2010, the total output value of the industry reached more than 930 billion yuan, and the number of employees exceeded 720,000. In terms of scale, my country has become the world's largest producer of wire and cable. The rapid development and transformation and upgrading of the industry have brought about the desire for technological improvement and the development of high-safety wire and cable, especially the research and utilization of new wire and cable materials are of great significance to the development of the wire and cable industry. Since most of the wires and cables widely used in various sectors such as industry, agriculture, and military are old-fashioned PVC wires and ...

AI Technical Summary

Problems solved by technology

[0004] A sheathed fire-resistant wire and cable proposed by the present invention solves the problem that the traditional fire-resistant cable can no longer meet the needs of the current situation, its manufacturing process is complicated, the production cost is high, and it is not conducive to practical application.

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