An inorganic mineral insulation metal sheath fireproof and waterproof cable

Abstract

The invention discloses an inorganic mineral insulation metal sheath fireproof and waterproof cable comprising a cable core. The cable core is formed by intertwisting a plurality of fan-shaped wire cores. Each fan-shaped wire core is composed of a fan-shaped copper conductor and a fan-shaped inorganic mineral insulating layer wrapping the fan-shaped copper conductor in an extruded mode. Ointment is filled in gaps in the cable core. A ceramic silicone rubber lapped-wrapping band is arranged outside the cable core. A corrugated metal sheath is arranged outside the ceramic silicone rubber lapped-wrapping band. A polyisobutylene waterproof film is arranged outside the corrugated metal sheath. The inorganic mineral insulation metal sheath fireproof and waterproof cable of the invention has advantages such as superior fireproof performance, a good waterproof effect, relatively good overall flexibility, safety, pro-environment, high corrosion resistance, convenient installation, simplicity in manufacturing, etc.

Description

technical field [0001] The invention relates to the field of electric wires and cables, in particular to an inorganic mineral insulated metal sheathed fireproof and waterproof cable. Background technique [0002] With the acceleration of industrialization and urbanization, various types of fire accidents also occur frequently, causing huge losses of life and property. Moreover, with the improvement of fire protection awareness, some electrical distribution lines in developed countries must choose fireproof cables according to different purposes. The domestic power sector is also promoting the use of fire-resistant cables in high-rise buildings and entertainment venues in cities. [0003] With the continuous development of society, while the social wealth is increasing, the risk of fire is also increasing, and the danger of fire is also increasing. According to statistics, the average annual fire loss in my country in the 1970s was less than 250 million yuan, and the averag...

AI Technical Summary

Problems solved by technology

Due to its structural characteristics, this kind of cable has low fire resistance temperature and low fire resistance reliability.

In the event of a fire, ordinary fire control cables cannot guarantee that the line will continue to work, and it is difficult to fight for a longer time for escape and rescue

There is a magnesium oxide fireproof cable on the market. In the actual use process, there are the following problems: firstly, it is not suitable for mobile occasions. Once the copper tube is damaged, the insulation performance will drop rapidly, and the insulation performance will drop sharply at high temperature. Therefore, it is not suitable for large quantities in the project. Secondly, this kind of cable is easy to absorb moisture because of the magnesium oxide insulation, so the requirements for cable longitudinal moisture resistance and protection from metal sheath damage are particularly important. The use of sealant at the end will seriously affect the service life; moreover, the manufacturing process also limits the cable. The length of the manufacturing will increase the number of joints, and the waterproof treatment of the joints is also very difficult. Often, the insulation resistance is unqualified due to water entering the joints.

[0005] Chinese patent "Patent No. 2012204838781" discloses a flexible fireproof cable with metal sheath inorganic mineral insulation, including copper conductor, inorganic mineral insulation and metal sheath. The fireproof effect of the cable is very good, but the waterproof effect is very poor

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