DEVICE FOR PIPELINE INDUCTION HEATING Russian patent published in 2011 - IPC H05B6/00 F16L53/00 

FIELD: electricity.

SUBSTANCE: device for pipeline induction heating comprises conversion and control device, heating element, conversion and control device is arranged on the basis of autonomous current inverter with quasi-resonant switching, and heating element is a conductor with multiwire current-conducting strand of high conductivity in heat-resistant insulation, arranged along pipeline axis, or at the angle to this axis, one turn forming a circuit or parallel connected turns of several circuits to form temperature field. Temperature field may be controlled due to displacement of conductor of one circuit along pipeline section, if straight direction conductor relative to reverse one is located at the maximum distance equal to diametre of pipe, heat transfer will be maximum, along full section of pipeline, as direct and reverse wires approach each other in pipeline section, temperature field exposure is reduced.

EFFECT: expansion of functional capabilities for creation of a thermal field of heating system, improved repairability, higher control over heat release processes, reduced weight and dimensions.

2 cl, 8 dwg