Environment-friendly mid-voltage fire resistant cable

Abstract

The invention discloses an environment-friendly mid-voltage fire resistant cable, which comprises an aluminum alloy conductor arranged in the middle of the cable, wherein a conductor shielding layer, a cross-linked polyethylene insulation layer and an insulation shielding layer are sequentially extruded on the aluminum alloy conductor in a three-layer co-extruding manner; a metal shielding layer is arranged outside the insulation shielding layer; an insulation wire core consists of the aluminum alloy conductor, the conductor shielding layer, an insulation layer, the insulation shielding layer and the metal shielding layer; the metal shielding layer, a composite fire resistant heat insulation layer, a metal belt interlocked armored fireproof layer and an outer sheath layer are sequentially arranged outside the insulation shielding layer; three insulation wire cores and a filling material are stranded to form a cable core; and the composite fire resistant heat insulation layer consists of an inorganic heat insulation layer wrapped outside the cable core, a low-smoke halogen-free antiflaming polyolefin inner protection layer extruded outside the heat insulation layer and an inorganic fiber layer wrapped outside the inner protection layer. The environment-friendly mid-voltage fire resistant cable is a fire resistant aluminum alloy conductor mid-voltage cable which is low in cost, has high bendability, high fire resistance and high antiflaming performance, and is energy-saving and environment-friendly during manufacturing.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a fire-resistant medium-voltage cable using a new type of aluminum alloy material and structure. Background technique [0002] With the rapid development of my country's economy, the voltage of the power supply system in the city is gradually increasing. At present, there are more and more high-rise and super-large buildings in domestic cities. If these buildings still use 0.6 / 1kV low-voltage power distribution, the supporting cables, installation and laying workload, and cable laying space will be huge. Too many and too large cables laid in the building will also affect the operation of the line and bring about major safety problems. In order to solve the practical power supply problems of high-rise and super-large buildings, many have begun to use medium voltage (6-35kV) power supply. For buildings, fire safety is the most important, the most concerned and the most impor...

AI Technical Summary

Problems solved by technology

[0010] Most of the medium-voltage fire-resistant cables described in the above three patents use a fire-resistant protective layer of ceramic silicone rubber. In the case of aerobic combustion, the fire-resistant protective layer will harden, but its hardening strength is low. The protection is not enough, and the production process is complicated, it is difficult to control the performance uniformity and stability of ceramic silicone rubber materials

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