Heating pipe control method and heating system

Abstract

The embodiment of the invention provides a heating pipe control method which belongs to the technical field of heating methods, and is used for controlling an electric heating pipe. The electric heating pipe heats a heated object in a mode of configuring the power-on duration to space power-on and power-off. According to the heating pipe control method, by adjusting the power-on time and the power-off time of the heating pipe in real time, the heating pipe is not in an output state for a long time, the operation of writing a target temperature value is only carried out once, and the temperature value is automatically adjusted and controlled in the process to obtain the real-time power-on time and power-off time, so that the phenomenon of untimely manual parameter adjustment is effectivelyavoided, and the safe heating effect of the heating pipe is more effectively improved.

Description

technical field [0001] The invention relates to the technical field of heating methods, in particular to a control method and a heating system for a heating pipe. Background technique [0002] The heating tube is made of seamless metal tubes (carbon steel tubes, titanium tubes, stainless steel tubes, copper tubes) filled with electric heating wires, the gaps are filled with magnesium oxide powder with good thermal conductivity and insulation, and the tubes are shrunk, and then processed into Various shapes required by users. The heating tube has the advantages of simple structure, high thermal efficiency, good mechanical strength, and good adaptability to harsh environments. It can be used for heating various liquids and acid-base salts, and is also suitable for heating and melting metals with low melting points. [0003] When metal equipment needs to be heated, the usual method is: the heating tube generates heat after being energized, and transfers the heat to the heated ...

AI Technical Summary

Problems solved by technology

The porosity of the electrical grade magnesium oxide filled in the heating tube is normally 15%. When the temperature of the heating tube is sufficiently high (800-1000°C), the oxygen in the pores interacts with the resistance wire and the tube, resulting in partial oxygen in the heating tube. pressure drop, when the oxygen pressure drops to 10 -19 ~10 -13 ata, the oxidation has the conditions for reduction and decomposition, and the magnesium oxide powder begins to turn black, which causes the insulation of the heating tube to decline and deteriorate, and finally leads to an increase in leakage current

When there is a leakage current and it is relatively large, when people mistakenly touch the heated equipment or equipment directly connected with metal, it will cause personal electric shock and cause major accidents

In addition, the phenomenon of leakage current exists for a long time, which will affect the signal accuracy of devices such as sensors in the same system.

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