Anti-flaming inhaul cable

Abstract

The invention relates to the technical field of bridge inhaul cables, in particular to an anti-flaming inhaul cable. The inhaul cable comprises a cable body, a polyurethane packaging belt, a thermal insulation layer and a fireproof rubber layer. The polyurethane packaging belt wraps the outer surface of the cable body, the thermal insulation layer wraps the outer surface of the polyurethane packaging belt, the fireproof rubber layer wraps the outer surface of the thermal insulation layer, and the fireproof rubber layer is formed by raw material compositions including water-based resin, ammonium polyphosphate, vermiculite, expanded graphite, perlite and water through a polymerization reaction. The fireproof rubber layer has the good heat resistance, cold resistance, anti-corrosion propertyand small environment factor influences, the full-fireproof cable body can be manufactured in a factory easily, the installing difficulty is lowered, the fireproof function of the inhaul cable is added, and the problem of traditional inhaul cable outer layer high-density polyethylene stress cracking is solved.

Description

technical field [0001] The invention relates to a technical field applicable to bridge cables, in particular to a flame-retardant cable. Background technique [0002] Cables are key components used in high-altitude engineering structures such as bridges and buildings. At present, the commonly used cables include parallel steel wire cables, steel wire rope cables, steel strand cables, etc., and are generally installed on these steel cable bundles when used. Fireproof coating layer or fireproof tape to achieve the effect of fireproofing, extruded (wrapped) high-density polyethylene (HDPE) as the outer sheath to play the role of anticorrosion. Such as Chinese patent CN2644470Y, discloses a kind of fire-proof cable, is provided with fire-proof coating layer or fire-proof wrapping tape on the outer surface of steel wire cable body, and the high-density polyethylene (PE) coating of flame-retardant and fire-proof used has reached current relevant Compared with the conventional PE ...

AI Technical Summary

Problems solved by technology

However, there are still some problems in this technical solution. At present, more and more attention is paid to the fire protection requirements of the cables in engineering design. The high-density polyethylene outer sheath mainly protects the steel cable bundles from external factors. When the cable is under stress, it is prone to stress cracking and cannot effectively protect the steel cable body from corrosion. At the same time, high-density polyethylene (HDPE) is a kind of poor flame retardancy and is prone to fire in the event of a fire. Combustion, leading to the stress failure of the cables under the high temperature of combustion, bringing devastating disasters to bridges and construction projects

Images