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A technology of armored heating cable and heating core, applied in the field of armored heating cable, can solve the problems of durability, high temperature resistance mechanical properties not up to standard, cable yield and insulation reduction, and long processing time, etc. Yield and insulation, good mechanical properties, and the effect of twist resistance
Inactive Publication Date: 2010-07-07
WUXI SAIFENG INSTR
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At present, the cold end of similar cables generally adopts the traditional inorganic insulation filling technology, which will reduce the yield and insulation of the produced cables under the disadvantage of requiring more processing time; in addition, in terms of durability, high temperature resistance, mechanical Performance is not up to par
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[0011] like figure 1 As shown, the armored heating cable of the present invention includes a metal sheath 1 and an inorganic insulating layer 2, the metal sheath 1 is composed of seamless continuous stainless steel or copper tubes, and an inorganic insulating layer 2 is arranged inside it. The inorganic insulating layer 2 is composed of high-purity, high-temperature, fused crystalline magnesium oxide, and a single or multiple alloy heating wires are arranged inside it as the heating core wire 3; the other end of the metal sheath 1 is provided with a cold-end core wire 4 , The middle joint end of the metal sheath 1 is provided with a metal connection sleeve 6 and a mica paper 5 is provided inside it. Current passes through the series resistance heating core of the cable to generate heat, so it can generate heat evenly; the stainless steel sheath can meet the needs of high temperature conditions and large heating power, as well as the needs of high temperature conditions and lon...
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Abstract
The invention relates to an armored heating cable, which comprises a metal sheath and an inorganic insulating layer, wherein the metal sheath comprises a seamless continuous stainless steel tube or a copper tube in which the inorganic insulating layer is arranged; a heating core wire is arranged in the inorganic insulating layer; the inorganic insulating layer comprises high purity, high temperature and electrofusion crystallized magnesia; and the heating core wire comprises one or more alloy heating wires. The armored heating cable of the invention has the advantages of adoption of mica isolating coating technology to substitute the traditional inorganic insulation filling technology, the improved rate of finished products and insulativity of the cable, and the greatly shorten manufacturing time of the finished products; and the invention can basically solve the aging problem, greatly prolong the service life, has good chemical stability, good mechanical property, and twisting resistance, extruding resistance, bending resistance, pulling resistance, friction resistance and general rough handling resistance.
Description
technical field [0001] The invention relates to a cable, in particular to an armored heating cable. Background technique [0002] Armored heating cables (often referred to as mineral insulated heating cables) are composed of metal protective tubes, inorganic insulators (such as magnesium oxide, aluminum oxide, etc.) and electric heating wires, and are compacted by molds. , energy saving, high impermeability, radiation resistance, explosion-proof, safe and reliable, easy installation, high mechanical strength, long service life, etc., can be widely used in aerospace, nuclear energy, petroleum, chemical, construction, machinery, electric energy and other industrial sectors And the field of scientific research and teaching; its structure is mainly composed of metal sheath, insulating layer and armored heating element, which can be easily connected to the power supply. At present, the cold end of similar cables generally adopts the traditional inorganic insulation filling techn...
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