Welded connector of mineral insulated fireproof cable

Abstract

The invention discloses a welded connector of a mineral insulated fireproof cable. The welded connector comprises a stainless steel casing pipe body, two locking nuts, two aluminium-oxide ceramic rings, two semi-circular aluminium-oxide ceramic shells, and two compression cones. The two locking nuts are arranged at the two ends of the s stainless steel casing pipe body coaxially at equal diameters; the two aluminium-oxide ceramic rings sleeve two cable wire cores; the two semi-circular aluminium-oxide ceramic shells sleeve the outside of the connection part between the two cable wire cores; and the two compression cones are connected between the stainless steel casing pipe body and the locking nuts in a sealing manner. The compression cones, the stainless steel casing pipe body, the aluminium-oxide ceramic rings, and the locking nuts are arranged coaxially. According to the invention, the stainless steel casing pipe body serves as a main protection body and insulation protection of theexposed part of the connection part of the wire cores is realized by combining the aluminium-oxide ceramic shells, so that a high-efficiency insulation fireproof effect is realized.

Description

technical field [0001] The invention relates to the technical field of welded connectors, in particular to a welded connector for mineral insulated fireproof cables. Background technique [0002] Mineral insulated cable is a cable that uses inorganic oxide as the insulating layer, pure copper with high conductivity as the conductor and seamless copper tube as the outer sheath. It has the advantages of fire prevention, waterproof, oil proof, corrosion resistance, explosion proof and radiation resistance, long life, high working temperature, large carrying capacity, mechanical damage resistance, halogen-free and non-toxic, overload resistance, electromagnetic shielding and excellent electromagnetic compatibility, etc. It is widely used in various fields of national economic construction, such as high-rise buildings, large shopping malls, petrochemicals, airports, etc. It can work normally and continuously at a temperature of hundreds or even thousands of degrees Celsius, and ...

AI Technical Summary

Problems solved by technology

However, the soldering point after brazing has a low melting point and cannot withstand high temperatures above 1000°C

It is time-consuming and labor-intensive to insulate the wire core by winding mica tape, canned magnesium oxide powder or silicon dioxide powder, and using fire-proof mud for sealing, and because the mud is too viscous, it is inconvenient to operate, and the fire-proof mud comes with Moisture, entering the insulation layer at the cut will affect the insulation performance of the cable

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