Production technology and production equipment of self-supporting metal-protected fire-resistant cables

Abstract

The invention relates to a cable, in particular to a self-supporting metal-protected fire-resistant cable and its production equipment and production process. The self-supporting metal-protected fire-resistant cable includes a copper core conductor, the outer side of the copper core conductor is covered with a ceramic insulating layer, the outer side of the ceramic insulating layer is set with a refractory mica tape insulating layer, and the outer side of the refractory mica tape insulating layer is covered A metal sheath is provided. The metal sheath includes a sleeve and several positioning protrusions. The positioning protrusions are evenly distributed around the axis of the sleeve. There are accommodating grooves between two adjacent positioning protrusions. The outer side of the metal sheath The sleeve is provided with a fireproof mud isolation sleeve, and the outer sleeve of the fireproof mud isolation sleeve is provided with a flame retardant sheath. The invention has the beneficial effects of effectively enhancing cable toughness, improving waterproof and fireproof effects, and the like.

Description

technical field [0001] The invention relates to a cable, in particular to a self-supporting metal-protected fire-resistant cable and its production equipment and production process. Background technique [0002] Existing cables are provided with an insulating layer, a refractory layer and a flame-retardant sheath on the outside of the copper core conductor, usually using ceramics, fire-proof mud or halogen-free low-smoke flame-retardant polyolefin materials, resulting in low internal support strength of the cable. The cable of this type of structure has poor toughness and limited waterproof effect. Contents of the invention [0003] The present invention mainly aims at the above problems, and provides a self-supporting metal-protected fire-resistant cable capable of effectively enhancing cable toughness and improving waterproof and fireproof effects, as well as its production equipment and production process. [0004] The purpose of the present invention is mainly achieve...

AI Technical Summary

Problems solved by technology

[0002] Existing cables are provided with an insulating layer, a refractory layer and a flame-retardant sheath on the outside of the copper core conductor, usually using ceramics, fire-proof mud or halogen-free low-smoke flame-retardant polyolefin materials, resulting in low internal support strength of the cable

The cable of this type of structure has poor toughness and limited waterproof effect

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