FIELD: heating.
SUBSTANCE: proposed are three-layer co-extruded heating cable and production plant for its production. Three-layer coextruded heating cable contains a conducting layer and a sealing layer. Conducting layer comprises first power wire and second power conductor arranged in parallel. Sealing layer separately seals the first power wire and the second power wire. Cross-section of the first power wire and the cross-section of the second power wire are semicircular, and the recess of the first power wire and the recess of the second power wire are located opposite each other. Three-layer co-extruded heating cable of present invention transmits heat generated by heating elements in space surrounded by two power supply wires, thereby increasing prevention of heat transfer for heat preservation.
EFFECT: preventing rapid loss of heat generated by the internal heating element, which saves energy.
10 cl, 9 dwg
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