Electric heating tube

Abstract

The invention discloses an electric heating tube which comprises a tubular shell, end sockets, a resistance wire and crystal magnesia powder. The end sockets are arranged on the two sides of the shell and used for sealing the ends of the shell, the resistance wire is arranged in the shell and used for heating, the crystal magnesia powder is arranged in the gap of the shell and the resistance wire to be used for heat conduction and insulation, and the outer surface of the shell is provided with an antirust coating. The electric heating tube is characterized in that a far-infrared radiating coating is arranged on the outer surface of the antirust coating, a waterproof layer is arranged on the connecting portion of a sealing opening and the shell, and a quartz sand layer is further sprayed between the antirust coating and the far-infrared radiating coating. The electric heating tube has the advantages of being reasonable in structure, good in using effect and long in service life.

Description

Technical field [0001] The invention relates to an electric heating tube, belonging to an electric heating device. Background technique [0002] Electric heating tube is a widely used heating device for heating air, oil, water, chemical media, etc. The heating tube used at present mainly includes the tube body, the resistance wire set inside the tube body, and the anti-rust coating provided on the surface of the tube body. However, after long-term use, the anti-rust coating will fall off, which will cause the heating tube to fail. The service life is reduced, and in severe cases, the electric heating tube will be corroded and broken, leakage and other major safety hazards. In addition, due to the harsh operating environment of the electric heating tube, it sometimes needs to be immersed in warm water for a long time. Because the magnesium oxide in the tube body has a moisture absorption function, too much moisture can easily penetrate into the heating tube, causing the heating w...

AI Technical Summary

Problems solved by technology

The heating tube currently used mainly includes the tube body, the resistance wire arranged inside the tube body and the anti-rust coating on the surface of the tube body, but the anti-rust coating will fall off after long-term use, causing the heating tube The service life is reduced, and in severe cases, there will be major safety hazards such as corrosion and fracture of the electric heating tube and electric leakage

In addition, because the operating environment of the electric heating tube is relatively harsh, sometimes it needs to be soaked in warm water for a long time. Since the magnesium oxide in the tube body has the function of absorbing moisture, too much moisture can easily penetrate into the inside of the electric heating tube, resulting in a short circuit of the heating wire and affecting Normal use

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