High-temperature-resistant compensation type fireproof cable

Abstract

The invention discloses a high-temperature-resistant compensation type fireproof cable, and relates to the technical field of fireproof cables. The high-temperature-resistant compensation type fireproof cable comprises three inner cores and a fireproof protection layer, the three inner cores are all located in a protection cavity in the fireproof protection layer, the parts, located in the protection cavity, of the three inner cores make contact with one another in a triangular shape, and an air cavity is formed in the position, located at the contact position of the two inner cores, of the fireproof protection layer. According to the high-temperature-resistant compensation type fireproof cable, the elastic compensation plug is arranged and can be separated from the airflow through hole when the cable is normally used, so that the airflow through hole can perform air exchange with the outside through the airflow through hole, the ventilation effect of the protection cavity is improved, and the situation that the temperature of the fireproof cable continuously rises and energy consumption is increased is prevented; the air pressure in the air cavity enables the elastic compensation plug to move and block the air flow through hole, smoke and flames generated during combustion are prevented from entering the protection cavity, and therefore the fireproof effect is achieved.

Description

technical field [0001] The invention relates to the technical field of fireproof cables, in particular to a high temperature resistant compensation type fireproof cable. Background technique [0002] A cable is usually a rope made of several or several groups of wires twisted together. Each group of wires is insulated from each other, and is often twisted around a center, and the entire outside is covered with a highly insulating covering. The cable has the characteristics of internal energization and external insulation. Fireproof cables usually wrap multiple wires with insulating layers inside the fireproof layer. [0003] During the use of the fireproof cable, if the current passing through the fireproof cable is too high, the temperature inside the fireproof cable will rise, and because the fireproof layer on the surface of the fireproof cable is in a sealed state, the fireproof layer and wires will always be in a high temperature state Under the circumstances, the resi...

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Problems solved by technology

[0003] During the use of the fireproof cable, if the current passing through the fireproof cable is too high, the temperature inside the fireproof cable will rise, and because the fireproof layer on the surface of the fireproof cable is in a sealed state, the fireproof layer and wires will always be in a high temperature state In this case, the resistance of the metal wire inside the cable increases, resulting in the problem of power waste caused by the increase in cable energy consumption.

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