Copper-sheathed fireproof cable

Abstract

The invention discloses a copper-sheathed fireproof cable, comprising a conductor core located in the center, the outer part of the conductor core is wrapped with a mica tape layer for protecting the conductor core and preventing oxidation of the conductor core, and the mica tape layer and the conductor core are arranged between the mica tape layer and the conductor core. There is a silica gel insulating layer, and a longitudinal seam welded copper sheath layer is arranged outside the mica tape layer; the conductor core is made of a plurality of conductors twisted, and at least one central conductor with a circular conductor cross-section is located in the center. The outer part of the conductor is twisted with at least one special-shaped conductor layer whose cross-section can be closely arranged after stirring. On the basis of satisfying the requirements of good fireproof performance, the invention has good moisture-proof performance, especially can be made in extra length, reduces the use of joints in construction, and provides reliable guarantee for ensuring the transmission of electric energy and information.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a fireproof cable. Background technique [0002] As a medium for power transmission and power distribution, cables are widely used in control installation, connection equipment, and power transmission. During the use of the cable, there may be short-circuit or open-circuit problems, which will lead to interruption of power communication. Therefore, with the rapid development of information technology today, the requirements for ensuring the reliability of information transmission and power supply are getting higher and higher, which affects the performance of the cable. The requirements put forward higher requirements. [0003] In addition to its own electrical conductivity, the performance indicators of cable performance are also reflected in: fire resistance, moisture resistance, explosion-proof performance, corrosion resistance, temperature performance, expansion perform...

AI Technical Summary

Problems solved by technology

However, most of the cables currently on the market can only meet the requirements of one or two functions, and cannot meet people's needs for multiple aspects of cables at the same time; especially for fire-resistant cables with better sales, most of the fire-resistant layers of the mineral layer use tank pressure oxidation. Magnesium powder drawing and forming, coupled with the influence of the conductor core manufacturing process, in order to prevent breakage during the construction process, the manufacturing length of the cable will be greatly affected, and the length of most fireproof cables usually does not exceed 200 meters , resulting in more joints during the construction process, laying hidden dangers for easy circuit breaks

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