Mineral insulated cable subassembly

Abstract

The invention relates to a mineral insulated cable subassembly. The mineral insulated cable subassembly comprises a mineral insulated cable having an outer sheath, an intermediate insulator and a corewire; a corresponding end of the mineral insulated cable is provided with a sealed adapter structure; the sealed adapter structure comprises an end sleeve sleeved out of a terminal of the core wire;a rear end of the end sleeve is welded and sleeved on the outer sheath; an adapter welding cup is sintered and fixed in front of the terminal of the core wire in the end sleeve through a glass disk; arear end of the adapter welding cup is connected with the terminal of the core wire in a welding manner; a front end of the adapter welding cup is an adapter end; a sealed filler chamber is disposedin the rear of the glass disk in the end sleeve; an insulating inorganic glue is poured into the sealed filler chamber to form an insulating potting colloid which wraps the corresponding core wire andthe adapter welding cup. The sealing for the ends is enhanced through the insulating potting colloid, the humidity resistance and reliability of the mineral insulated cable subassembly are improved,and the situations of poor sintering quality and poor waterproofness caused by direct sintering of the outer sheath and the core wire are avoided.

Description

technical field [0001] The present invention relates to a mineral insulated cable assembly. Background technique [0002] Mineral insulated cables usually include a mineral insulator and a core wire built into the mineral insulator, and also include an outer sheath surrounding the outside. All materials in mineral insulated cables are made of metal and inorganic non-metallic materials, without any organic materials, and have excellent fire resistance, high temperature resistance, vibration resistance, corrosion resistance and other characteristics. Mineral insulators in mineral insulated cables are made of inorganic powders, such as magnesium oxide, silicon dioxide or aluminum oxide, etc. These powders are very easy to absorb moisture in the air, especially after the chemical reaction between magnesium oxide and water will generate conductive hydroxide magnesium. If the end of the mineral insulated cable is not sealed, the moisture will easily enter the mineral insulator f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mineral insulated cable assembly to solve the problem that the sintering quality cannot be guaranteed due to the mismatch between the cable sheath and the core wire material when the end of the mineral insulated cable is sealed by glass sintering in the prior art technical problem

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