Novel high-flexibility mineral insulated special cable

Abstract

The invention discloses a novel high-flexibility mineral insulated special cable. The copper conductor passes through a plurality of insulated supporting frames; a metal sheath layer is arranged outside the copper conductor and the insulated supporting frames; and an inorganic powder insulated material fills space between the metal sheath layer and the copper conductor. As the non-sintered inorganic powder fills the inner part of the metal sheath layer, the bending performance of the mineral insulated cable is improved fundamentally; and the insulated supporting frames connected with the conductor can ensure the radial distance between the conductor when bent and the metal sheath is uniform.

Description

technical field [0001] The invention belongs to the technical field of special cables, and is especially suitable for use in occasions requiring high fire protection or corrosion resistance, such as nuclear power, petroleum, chemical industry, ships and high-rise buildings. Background technique [0002] In the past two decades, people have conducted extensive and in-depth research on the flame-retardant and fire-resistant properties of organic insulation or sheath materials for wires and cables, and many flame-retardant and fire-resistant cable products with superior performance have been successfully developed; but unfortunately, these organic materials Harmful gases and dense smoke will still be released during the combustion process, and it is difficult to ensure that some important electrical circuits can work normally during the fire. Mineral insulated cables (generally copper core copper sheathed magnesia insulated cables) are safety cables with excellent performance. ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing mineral insulated cables that are not easy to bend, inconvenient for large-length production, and the insulation distance between the conductor and the sheath is uneven; the present invention provides a new type of high-flexibility mineral-insulated special cable. Special cables not only have the excellent properties of general mineral insulated cables, but also have excellent properties such as excellent flexibility and convenient production of any length; and are easier to manufacture

Images