Mineral insulated fireproof cable

Abstract

A mineral insulated fireproof cable disclosed by the present invention comprises a cable body, the cable body comprises a cable core, a mineral insulated fireproof layer and a protective layer, the mineral insulated fireproof layer sequentially comprises a first mineral insulated fireproof layer and a second mineral insulated fireproof layer from inside to outside, a first cavity is formed between the first mineral insulated fireproof layer and the cable core, a second cavity is formed between the second mineral insulated fireproof layer and the first mineral insulated fireproof layer, the first cavity and the second cavity are filled with water, a coating layer is arranged on the outer surface of the second mineral insulated fireproof layer, and the coating layer is an epoxy coating. The fireproof function of the cable is achieved through the coating layer, the second mineral insulated fireproof layer and the first mineral insulated fireproof layer, a fire source can be extinguished in time by filling the first cavity and the second cavity with water liquid, the fire is prevented from being serialized, and heavy loss caused by electric leakage after the cable core is burnt is avoided.

Description

technical field [0001] The invention relates to a cable, in particular to a mineral insulated fireproof cable. Background technique [0002] Fire refers to the disaster caused by burning out of control in time and space. Among various disasters, fire is one of the main disasters that most frequently and commonly threaten public safety and social development. [0003] In order to save more lives, property and information from the ruthless fire scene, the application of fire-resistant cables has become the top priority, and the fire-resistant cables currently on the market can be divided into rigid and flexible according to their structural characteristics. Due to the defects of rigid mineral insulated cables (Mineral Insulated Cable) in terms of reliability, production and laying, rigid mineral insulated cables are gradually withdrawn from the market in developed countries in Europe and the United States, and flexible mineral insulated fireproof cables have become mainstream...

AI Technical Summary

Problems solved by technology

Generally, the cable is only coated with a layer of protective layer on the outer surface, and there is no emergency fire extinguishing device, and the traditional coating machine on the surface of the cable is horizontally coated, and the enameled wire passes through the coating roller or coating nozzle in the horizontal direction during coating. However, just The sprayed paint surface is not stable enough, and it is easy to slide down under the influence of gravity, resulting in insufficient roundness of the paint surface, which leads to uneven coating on the cable surface, and some surfaces do not have the effect of fire protection, resulting in a huge fire hazard. Potential safety hazards, and a large amount of toxic gas will be generated during the coating process, and the toxic gas will be discharged indiscriminately, causing hidden dangers to the physical and mental health of production personnel

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