Mineral insulated cable of large length

Abstract

The invention relates to a cable, in particular to a long mineral insulation fireproof cable, which solves the problem that the organic insulating cable has poor high temperature resistance and flame resistance (taking fire and burning) and low electric insulating property. The technical proposal of the invention is as follows: the long mineral insulation fireproof cable consists of a copper conductor, an insulating layer and a copper sheath; the conductor is coated by the insulating layer, and the copper sheath is coated outside the insulating layer. The long mineral insulation fireproof cable is characterized in that the insulating layer is a compact magnesia powder filling layer; and the copper sheath is an argon arc longitudinal seam welding sheath formed by wrapping a copper strip. The long mineral insulation fireproof cable can be widely applied to explosion protection systems and devices, the hazardous fire areas (petrochemical industry, nuclear power stations, etc.), high temperature places (metallurgical industry, power plants, etc.), underground lines (metro, tunnel, mine, etc.) and the areas requiring specially safe facilities (public places, dense population areas, high-rise buildings, etc.), and also can be used for distributing and transmitting electric energy or electrical control and connection.

Description

Technical field: [0001] The invention relates to a cable, in particular to a large-length mineral insulated fireproof cable. Background technique: [0002] According to relevant statistics, electrical fires in the country are increasing year by year, and the proportion of electrical fires in Shanghai is higher than that of the whole country. It is recorded that the proportion of electrical fires in Shanghai is: 1992: 26.9%; 93: 30%; 94: 35.8%; 96: 36.2%; 97: 40%. There is an increasing trend year by year. [0003] The fact that 8 of the top ten fire cases in the country in 1995 were caused by electrical fires tells us that it is extremely urgent to minimize the fires caused by wires and cables. Since the 1980s, various types of cables have been developed at home and abroad, such as flame-retardant cables, oxygen-barrier cables, fire-resistant cables, halogen-free low-smoke flame-retardant cables, etc. Although these cables have adopted certain fire prevention measures, th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large-length mineral insulated fireproof cable, which mainly solves the technical problem that the existing fireproof cables cannot be non-combustible

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