Special high-frequency heater for hot drawing roller

Abstract

The invention relates to a special high-frequency heater for a hot drawing roller, which can effectively avoid the generation of vortices and effectively heat the hot drawing roller. The high-frequency heater comprises an industrial-frequency heater and a temperature controller, wherein the industrial-frequency heater is internally provided with high-frequency heating coils, thus forming the high-frequency heater. The invention has the advantages of obviously lowered energy consumption, no internal heat, no vortices and high heating speed. Besides, the heater can heat only the surface without transferring heat to the inside, the whole circuit is stable in control, and the heater can not be burnt out easily. On-line operating tests show that the energy can be saved by 20-30% compared with the prior art.

Description

technical field [0001] The invention relates to a special-purpose high-frequency heater for hot drawing rollers which can effectively avoid the generation of eddy currents and effectively heat the hot drawing rollers, and belongs to the field of heater manufacturing for hot drawing rollers. Background technique [0002] At present, in chemical fiber equipment, the hot pulling roller is controlled by a power frequency heater. Its shortcomings: First, the energy consumption is high, and the actual active heat and reactive heat are basically equal, which means that the temperature required for the surface is consistent with the interior. The power frequency of this frequency heater is 50HZ, and the ordinary yarn-covered wire heating coil, the heating coil heating principle adopts inductive heating, which conforms to Ohm's law I=U / R, so the eddy current is large and the internal heat is high. Redness is easy to burn out, and the energy consumption is also high; the second is th...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, the energy consumption is high, and the actual active heat and reactive heat are basically equal, which means that the temperature required for the surface is consistent with that of the interior

The power frequency of this frequency heater is 50HZ, and the ordinary yarn-covered wire heating coil, the heating coil heating principle adopts inductive heating, which conforms to Ohm's law I=U / R, so the eddy current is large and the internal heat is high. Redness is easy to burn out, and the energy consumption is also high; the second is that direct heating is controlled by a 0-24V solid state relay as a switch signal, there are many faults, the heating coil is easy to burn out, and the temperature required by the surface process is quite different from the internal temperature. The temperature is much higher than the apparent temperature

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