Production technology of fire-resistant power cable

Abstract

The invention relates to a production technology of a fire-resistant power cable. The production technology comprises the steps of copper wire drawing, copper wire softening, wrapping of a mica tape on the surface of the softened copper wire to form a fire-resistant layer, extrusion of an upper teflon insulating layer out of the copper wire wrapped with the fire-resistant layer through a fluorine plastic extruder for preparation of core wires, cooling of the core wires, pair twisting of the core wires for formation of a cable, extruding formation of the cabled core wires and flame-retardant low-smoke flame-retardant polyolefin insulation sheath material through a single-screw extruder and power cable coiling and storage. The preparation technology is simple and easy to control and realize, and the power cable prepared by the production technology has excellent electrical transmission performance and mechanical tensile performance, higher flame-retardant and fire-resistant capacity and long service life.

Description

technical field [0001] The invention relates to a production process of a power cable, in particular to a production process of a fire-resistant power cable. Background technique [0002] As we all know, the power cable is a wire that transmits current. It is mainly composed of a copper wire core and a sheath. The sheath is an indispensable structural part of the power cord, which plays the role of protecting the insulation of the wire and ensuring the safety of the power cord. Insulate the copper conductor from water, air and other media to avoid leakage. The type of power cord changes with the type of sheath material. If the sheath material is made of low-smoke and flame-retardant materials, then this kind of power cord becomes a low-smoke, flame-retardant and fire-resistant wire. Traditional power cords mostly use polyvinyl chloride (PVC) as the sheath material. Because the PVC material contains halogen, it has certain flame retardant properties. And cause burning, ther...

AI Technical Summary

Problems solved by technology

Traditional power cords mostly use polyvinyl chloride (PVC) as the sheath material. Because the PVC material contains halogen, it has certain flame retardant properties. And cause combustion, there is a fire safety hazard. Once a fire occurs, these wire sheaths will produce harmful gases and a large amount of smoke after burning, which will cause "secondary disasters"

At present, with the continuous improvement of the level of science and technology, more and more power cables are required to have a certain fire resistance. However, the insulation sheath of the traditional power cord is mostly made of PVC material, which has poor fire resistance, and the traditional production process is not suitable for use. Therefore, it is urgent to develop a production process suitable for the production of flame-retardant and fire-resistant power cords.