Waterproof and rat-and termite-proof high-flexible mineral insulated fireproof cable

Abstract

The invention discloses a waterproof and rat-and termite-proof high-flexible mineral insulated fireproof cable and belongs to the technical field of cables. Each conductive element is formed by twisting a plurality of wire cores and comprises a twisted soft copper conductor, a mica tape insulating layer and a mineral insulating layer; and an aluminum bonding waterproof layer, an integrated fire protection layer of a high flame-retardant polyolefin oxygen insulation layer and a ceramic polyolefin heat insulation layer and a rat-and termite-proof outer sheath layer are sequentially arranged outside the conductive elements. The specified fire supply, mechanical shock and water spray line integrity test requirements of BS6387 (the outer diameter of the cable is smaller than or equal to 20mm) or BS8491 (the outer diameter of the cable is greater than 20mm) can be met; and the waterproof and rat-and termite-proof high-flexible mineral insulated fireproof cable has the advantages that field construction and installation are facilitated, the cable has relatively high flexibility, the length and the section of the cable are not limited, and meanwhile, the cable has excellent electric property and mechanical property and excellent waterproof and rat-and termite-proof properties, and is widely applied to power distribution, control and fire extinguishing systems with high fire protectionrequirements.

Description

technical field [0001] The invention relates to a fireproof cable, in particular to a waterproof, rodent-proof and highly flexible mineral-insulated fireproof cable. Background technique [0002] At present, BTTZ cables with copper core and copper sheath and magnesium oxide insulation type and YTTW cable products with copper core and copper sheath inorganic mineral insulation that meet the integrity test requirements of BS6387 or BS8491 standards for fire supply, mechanical shock, and water spray lines, Since this type of cable is made of copper sheath, the material itself is relatively hard, and the material cost is high, and the bending degree of the cable is limited. And the cross-section also has certain limitations. [0003] Therefore, it is necessary to develop a flexible fireproof cable that is convenient for on-site construction and installation, a long cable that is convenient for laying and installation, high flexibility, and an unlimited cross-section. The inven...

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Problems solved by technology

[0002] At present, BTTZ cables with copper core and copper sheath and magnesium oxide insulation type and YTTW cable products with copper core and copper sheath inorganic mineral insulation that meet the integrity test requirements of BS6387 or BS8491 standards for fire supply, mechanical shock, and water spray lines, Since this type of cable is made of copper sheath, the material itself is relatively hard, and the material cost is high, and the bending degree of the cable is limited. and cross-sections have certain limitations

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