Special-tube-shaped electric heating apparatus and preparation method therefore

Abstract

The invention belongs to the technical field of an electric heating apparatus, and relates to a special-tube-shaped electric heating apparatus and a preparation method therefore. The main body structure comprises an electric heating tube, electric heating wires, magnesium oxide, an inner lead-out rod, an outer lead-out rod, a fuse, a pressing plate assembly, a heat sensor, a flange, a rubber sealing strip, an insulator and a terminal; the preparation method comprises the steps of carrying out H2 annealing, wire winding, and spot welding, adding magnesium oxide, measuring withstand voltage, reducing the tube diameter, performing aligning, bending the tube and forming, clamping the tube, carrying out overall oil pressure processing, cutting the rod, assembling the rod, assembling the sealing strip, drying and removing moisture, detecting the insulation, packaging the insulator, carrying out water voltage test, resistance value test and withstand voltage test, installing the heat sensor, examining the appearance and the packaging, leaving the factory, and the like. The apparatus is simple in structure, creative in material selection, simple and convenient to manufacture, simple in steps, good in product quality, long in service life, and high in safety property.

Description

Technical field: [0001] The invention belongs to the technical field of electric heating devices, and relates to an electric heating device with a special-shaped tubular structure and a preparation method. The electric heating tube is made of Ingle 800 material, and both ends are equipped with overheating protection devices, which greatly improves the service life of the electric heating device and safety performance. Background technique: [0002] The electric heating device is a kind of electric heating equipment mainly composed of electric heating tubes, which are mostly used to heat up, keep warm and heat the flowing liquid medium and gaseous medium; the so-called electric heating tube is a kind of metal tube spiral resistance wire and crystallization Tubular electric heating element composed of magnesium oxide powder, etc. At present, the common electric heating tube materials in the prior art include: (1) stainless steel sheath heater, although the stainless steel hea...

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Problems solved by technology

Ingrid 800 is used as a nitric acid medium in chemical and petrochemical processes, as a heater for cooking solutions in pulp production, as a heat exchanger for air-cooled process steam in the petroleum industry, etc., but in electric heating tubes The application in the industry is not common, and many electric heating tube production technicians do not know much about the various properties of this alloy material, especially the key technology for the production of this material for electric heating tubes has not yet been mastered

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