Novel high-flexibility fireproof cable and manufacturing method thereof

Abstract

The invention provides a novel high-flexibility fireproof cable and a manufacturing method thereof. The novel high-flexibility fireproof cable comprises a flexible or soft structural conductor, a soft structural protecting layer, a fireproof isolating belt, a high-temperature isolating belt, a thermoset low-smoke and halogen-free polyolefin or elastomer insulating layer, a soft mineral paper rope, a high-temperature isolating belt and a low-smoke and halogen-free polyolefin or elastomer protecting sleeve; the soft structural protecting layer is arranged at the outside of the flexible or soft structural conductor; the fireproof isolating belt is arranged at the outside of the soft structure protecting layer; the high-temperature isolating belt is arranged at the outside of the fireproof isolating belt; the thermoset low-smoke and halogen-free polyolefin or elastomer insulating layer is arranged at the outside of the high-temperature isolating belt; the soft structural protecting layer, the fireproof isolating belt, the high-temperature isolating belt and the thermoset low-smoke and halogen-free polyolefin or elastomer insulating layer form a soft and reliable fireproof layer with relatively high electrical insulation performance; the soft mineral paper rope fill between a plurality of cores; the high-temperature isolating belt wraps a cable core; the low-smoke and halogen-free polyolefin or elastomer protecting sleeve is arranged at the outside of the high-temperature isolating belt.

Description

technical field [0001] The invention relates to a fireproof cable and a manufacturing method thereof, in particular to a novel highly flexible fireproof cable and a manufacturing method thereof. Background technique [0002] A Chinese patent has disclosed a flexible mineral insulated fireproof cable (CN201210154745), which includes several bundles of conductive wire cores and outer sheaths wrapped outside the bundles of conductive wire cores, each bundle of conductive wire cores includes a conductor and an insulating wire wrapped outside the conductor Floor. The conductor is twisted from multiple strands of aluminum alloy wires; the insulating layer is composed of a mica tape wound outside the conductor and a color separation sleeve made of modified polyolefin wrapped outside the mica tape; several bundles of A firewall is provided between the conductive wire core and the outer sheath, and the firewall is mineral powder filled in the gaps between several bundles of the cond...

AI Technical Summary

Problems solved by technology

Not to mention that the insulating strips become powders and fall off after burning, which cannot effectively solve the defect of poor insulation performance; the tubular metal structure, coupled with embossed mechanical deformation, is completely contrary to flexibility, and it does not solve the problem of structural rigidity at all. a birth defect

In addition, the above two fireproof cables can pass the GB, IEC test, and the BS fire resistance + vibration + spray test, but they cannot pass the more stringent AS impact + cutting + fire resistance + spray test. In the impact + cutting test, the metal sleeve will crush the insulation layer and short circuit the conductor

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