Automatic temperature-control electric tracing band

Abstract

The invention proposes an automatic temperature-control electric tracing band. The automatic temperature-control electric tracing band comprises a positive temperature coefficient (PTC) material core body, wherein a first main heat tracing wire core, a second main heat tracing wire core and an auxiliary heat tracing wire core are arranged in the PTC material and extend along a length direction of a cable, the first main heat tracing wire core, the second main heat tracing wire core and the auxiliary heat tracing wire core are arranged in parallel, the auxiliary heat tracing wire core is arranged between the first main heat tracing wire core and the second main heat tracing wire core, the first main heat tracing wire core is formed by twisting a first conductor and a first carbon fiber bundle, the second main heat tracing wire core is formed by twisting a second conductor and a second carbon fiber bundle, the auxiliary heat tracing wire core is formed by twisting a third conductor and a third carbon fiber bundle, an inner sheath insulation layer wraps the periphery of the PTC material core body, a waterproof and heat preservation layer wraps the periphery of the inner sheath insulation layer, a weaving shielding layer wraps the periphery of the waterproof and heat preservation layer, and an outer sheath layer wraps the periphery of the weaving shielding layer. The automatic temperature-control electric tracing band proposed by the invention is simple in structure and good in stability.

Description

technical field [0001] The invention relates to the technical field of heating cables, in particular to a self-controlling electric heating cable. Background technique [0002] Electric heating cable is a new type of high-tech product. Since it entered the application field in the 1970s, it has been widely used in the transportation of liquid objects in pipelines and the antifreeze and heat preservation of tanks, maintaining process temperature, heating roads, ramps, crosswalks, Eaves and floors etc. Electric heating cables are usually divided into parallel electric heating cables and series electric heating cables. The resistance wires of parallel electric heating cables are connected in parallel, the calorific value per unit length is constant, and the output power is not affected by changes in ambient temperature, but In the prior art, the structure of the parallel electric heating cables is relatively complicated, the cost is high, and the stability is poor. Contents ...

AI Technical Summary

Problems solved by technology

Electric heating cables are usually divided into parallel electric heating cables and series electric heating cables. The resistance wires of parallel electric heating cables are connected in parallel, the calorific value per unit length is constant, and the output power is not affected by changes in ambient temperature, but In the prior art, the structure of parallel electric heating cables is relatively complicated, the cost is high, and the stability is poor

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