Flexible fireproof cable

Abstract

The invention provides a flexible fireproof cable. The flexible fireproof cable comprises cable cores, a thermal-collapse-resistant filling layer, a waterproof layer, an outer blocking layer and a sheath layer, wherein each cable core comprises a conductor, an inner blocking layer and an insulating layer from interior to exterior, at least one cable core is wrapped with the waterproof layer, the filling layer is arranged between the waterproof layer and the cable cores, the filling layer is formed by weaving ceramic silicon sealing strips and glass fiber in a winding mode, and the waterproof layer is wrapped with the outer blocking layer and the sheath layer in sequence. According to the flexible fireproof cable, on the premise that a high fireproof level is achieved, traditional technologies such as the wrapping technology and the cabling technology are adopted for all the important structures such as the inner blocking layers, the outer blocking layer and the thermal-collapse-resistant filling layer, and the problems that an existing fireproof cable is high in price, complicated in technology, large in manufacturing difficulty because special devices are needed, not convenient to construct because a metal sheath is hard and low in fireproof performance are effectively solved.

Description

technical field [0001] The invention relates to a fireproof cable, in particular to a flexible fireproof cable, which belongs to the field of cable manufacturing. Background technique [0002] With the increase of population density and the rise of high-rise buildings, the fire safety facilities of indoor places have been paid special attention. As the basis of fire safety, wire and cable have stricter requirements on its fire performance and construction convenience. At present, the commonly used fireproof cables are mineral insulated cables, and the structure is copper conductor, mineral insulation and copper sheath. Although this type of cable has strong fire resistance, it is expensive; the complex process requires special equipment to manufacture; the hard metal sheath brings inconvenience to construction, especially in places with small construction areas. It is more difficult to lay. [0003] There are also some fire-resistant cables that contain a mica composite ta...

AI Technical Summary

Problems solved by technology

However, mica is very brittle, and the reject rate is extremely high in the process of tape making and wrapping, and the mica tape cannot be made too thick, otherwise it cannot be bent or it will break when bent

At high temperature, the polymer material attached to the mica will decompose and melt, and the unprotected mica is easily damaged and loses its protective effect on the conductor.

Therefore, it is difficult for the commonly used fire-resistant cables to work for 90 minutes under fire conditions, which cannot meet the corresponding fire-resistant requirements.

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