Low-power fire-resistant alarm cable and processing method thereof

Abstract

The invention discloses a low-power fire-resistant alarm cable and a processing method thereof. The low-power fire-resistant alarm cable comprises a plurality of concentrically stranded wire cores, afirst flame-retardant layer coating the wire cores, a second flame-retardant layer coating the first flame-retardant layer, a conductive shielding layer coating the second flame-retardant layer, a halogen-free oxygen barrier layer coating the conductive shielding layer, a steel belt coating the halogen-free oxygen barrier layer, and a halogen-free insulating sheath coating the steel belt. Each wire core comprises a copper conductor and a ceramic thermosetting halogen-free insulating layer coating the copper conductor. At least one grounding wire is arranged between the second flame-retardant layer and the conductive shielding layer. By adopting the low-power fire-resistant alarm cable, the insulation effect of the wire cores and the circuit integrity can be ensured in a fire environment, and the grounding wire can feed back a leakage current to a power supply system of a building. When the alarm cable is burnt, generated gas is non-toxic and harmless to human bodies, no black smoke isgenerated, and the sight of escape personnel or disaster relief personnel is not affected.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a low-power fire-resistant alarm cable and a processing method thereof. Background technique [0002] At present, the outbreak of various fires in buildings is mostly due to the fact that the alarm cable cores of the rescue facilities are easily burned in case of fire, and the normal operation of the rescue facilities cannot be guaranteed, resulting in casualties and property losses. Existing alarm cables have poor fire-resistant effect, and the wire cores are easily burned. When encountering fire-proof spray water in a fire, electric leakage is also very easy to occur, and the safety of rescue and escape personnel cannot be guaranteed. Moreover, most of the existing alarm cables use halogen-containing materials as sheaths, and the cables are prone to produce toxic gases and black smoke in a fire environment, which is extremely unfavorable for rescue work and personnel escape. In...

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Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the main purpose of the present invention is to provide a low-power fire-resistant alarm cable and its processing method, aiming to solve the problem that the wire core of the existing low-power alarm cable is easily burned in case of fire, and the fire-resistant It is easy to le

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