Novel explosion-proof flame-retardant belting material for cable

Abstract

The invention provides a novel explosion-proof flame-retardant belting material for a cable, which comprises the following components in percentage by mass: 70-97% of a flame-retardant rubber materialand 3-30% of a framework material, and the framework material is a flame-retardant fiber mesh material with the strength of more than 25g/denier. The flame-retardant rubber material comprises a halogen-free flame retardant, liquid rubber, a filler, a chain extender and a catalyst. The framework material is controlled to be designed to be a flame-retardant fiber mesh type, good ventilation performance is achieved, air circulation is facilitated, heat generated by the cable in the operation process can be dissipated to the external environment in time, the temperature of the cable is reduced, and the service life of the cable is prolonged. By controlling the mass percentage of the halogen-free flame retardant in the flame-retardant rubber material to be 35-70%, the explosion-proof flame-retardant belting material can be instantly expanded and foamed under the action of open fire, thereby playing a good role in fire prevention and heat insulation on the internal cable and effectively protecting the cable from being damaged by fire accidents.

Description

technical field [0001] The invention relates to the field of flame retardant materials, in particular to a novel explosion-proof flame retardant tape material for cables. Background technique [0002] With the advancement of my country's urbanization process and the rapid development of power infrastructure construction, there are more and more urban power cable tunnels, trenches, and underground comprehensive pipe galleries, effectively solving the problems of uncoordinated development of power overhead lines and urban appearance and city appearance. . However, although the cable tunnel is isolated from the outside world and has a single operating environment, fires often occur due to insufficient ventilation, aging cables, and excessive local temperature rise, which are prone to breakdown and explosion accidents, causing damage to cable lines, equipment and personnel, and causing damage to cables. operation and maintenance challenges. Therefore, fire and flame retardant m...

AI Technical Summary

Problems solved by technology

However, fire-resistant cables are expensive and not universal; the long-lasting adhesion of fire-resistant coatings to cables is poor, and the construction is limited by the site, so it needs to be painted many times, and a dense covering layer cannot be formed. The hardness of the carbonized layer is poor, and it is easy to be burned through or Blowing down, cracks are easy to appear at the bend of the cable, poor fire resistance, easy aging, and there is a risk of organic solvent volatilization; the disadvantage of traditional non-self-adhesive flame-retardant tapes is the lack of lasting adhesion with the cable, and the fire-resistant performance of fire-resistant materials is poor. The service life is short and the timeliness is poor. After long-term operation, its flame-retardant effect will be weakened, and repeated construction is required, which will increase the cost and burden of cable operation and maintenance; and self-adhesive flame-retardant tapes are also complicated to prepare, and the airtight fire-resistant flame-retardant jacket has different forms. It is conducive to the timely dissipation of heat when the cable is running, and cannot be reused; although the fire-resistant box can effectively prevent the flame from burning when the cable catches fire, and the two ends are tightly sealed with fire-resistant flexible blocking materials, the cost is relatively high, and the cable interlayer is not considered. There is a problem of vertical fire blocking and separation, and the plugging is prone to loosening and falling off. The volume is too large and the installation method is complicated. When constructing in the cable trench, all the cover plates on the construction site need to be turned up for construction. The construction period is long, which is not conducive to installation and future proximity Construction and maintenance of cables

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