Understand the detailed structure of Gangbei electric heating pipe

The electric heating tube should use a metal tube as the metal shell (including stainless steel, air-conditioning copper tube), and a spiral electric heating alloy wire (nickel-chromium, iron-chromium alloy) is distributed along the central axis of the tube. The gap is filled with magnesia sand with strong insulation and thermal conductivity, and the two ends of the hole are sealed with silicone. This kind of metal shielded cable heat shrink material can heat air, molds and various liquids.

The typical structure (popular structure) of the metal tubular electric heating tube is generally composed of 5 components: composite insulator, sealing material, lead rod, filler, heating wire, insulating sheath tube, terminal.

The spiral heating wire and the lead rod are located in the middle of the insulating sheath tube. Its processing technology is to insert the spiral heating wire into the seamless steel tube, copper tube or aluminum tube, and the gap is evenly filled with insulating and thermally conductive oxides such as crystalline magnesium oxide powder (alumina or clean quartz sand can also be used). Then use a tube shrinking machine to shrink the tube diameter to make the oxide material dense (relative density reaches more than 3.3g/cm3), ensure that the heating wire is isolated from the air, and the middle position does not deviate and touch the wall thickness. In this way, the utilization coefficient calorific value can be increased several times. The service life can also be correspondingly increased to more than 10 years. Compared with the same large heat shrink material, the tubular electric heating tube can save 5% of the heat shrink material, and the thermal efficiency can reach more than 90%.

Therefore, from the structure of the electric heating tube, the metal tubular electric heating tube is currently a widely used, compact, stable, durable and sealed heat shrink material. It can be successfully used in industry and household appliances, and its application is becoming more and more common. I hope that more users will have a clear understanding of the structural principle of the electric heating tube.