Cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheathed fire-resistant cable

Abstract

The invention discloses a cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheathed fire-resistant cable, which comprises a fire-resistant cable body; the fireproof cable body comprises four groups of uniformly arranged copper conductors, a mica tape, an insulating layer, an inner sheath, an armor layer and an outer sheath, the outer ring of each copper conductor is sleeved with the mica tape, the outer ring of the mica tape is sleeved with the insulating layer, the outer ring of the insulating layer is sleeved with the inner sheath, and the outer ring of the inner sheathis sleeved with the outer sheath; the fire-resistant cable basically does not emit harmful smoke when meeting open fire for combustion, cannot be carbonized, and has the advantages of being good in flexibility, high in mechanical strength, high in temperature-resistant grade and not prone to wrinkling and folding in the wrapping process in the normal state.

Description

technical field [0001] The invention belongs to the technical field of cables, and relates to a fire-resistant cable with a polyvinyl chloride sheath, in particular to a fire-resistant cable with a cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheath. Background technique [0002] A cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires. [0003] Fire-resistant cables refer to cables that can maintain safe operation for a certain period of time under the condition of flame burning. Fire-resistant cables are widely used in high-rise buildings, underground railways, underground streets, large power stations, important industrial and mining enterprises and other places related to fire safety and fire-fighting and lifesaving, such as power supply lines and control lines of emergency facilities such as fire-fighting equipment and emergency guide lights. [0004] In the prior art, when various m...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that in the prior art, when various materials are mixed, the stirring method is relatively simple, and the stirring paddle is usually used for stirring, but the stirring efficiency is low, and the stirred materials still need to be mixed. The separate pulverization process leads to a longer preparation process for the sheath material and a more complex structure, which will also increase the energy; the sheath is put on the semi-finished cable through the extruder, and then the semi-finished cable passes through the rectangular water tank , and cool the sheath by pouring flowing tap water into it, and this cooling mode needs to set up a water tank with a large area and waste a lot of tap water and pollute the water quality, so a cross-linking method is proposed Polyethylene insulated flame retardant PVC sheathed fire resistant cable

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