1. What are the structural characteristics of the single-head electric heating tube? The typical structure of the single-head electric heating tube is the same as that of the electric heating tube. It is generally composed of five parts: insulator, sealing material, extraction rod, filler, electric heating wire, metal sheath tube, Terminals.
2. The spiral heating wire and the lead-out wire are located in the center of the metal sheathed tube. The manufacturing process is to insert the spiral electric heating wire into the seamless steel pipe, the copper pipe or the aluminum pipe, and the gap is evenly filled by the multi-tube filling machine. Insulating and thermally conductive oxidizing medium, such as crystalline magnesium oxide powder (also available in alumina or clean quartz sand). Then, the tube diameter is reduced by a tube shrinking machine to make the oxide medium dense (density reaches 3.3 g/cm3 or more), and the heating wire is insulated from the air, and the center position does not shift and touches the tube wall. such. The calorific value per unit area can be increased by a factor of ten. The service life can also be increased to more than 10 years. Compared with the same large heat electric heating element, the tubular electric heating tube can save 5% of the electrothermal material, and the thermal efficiency can reach more than 90%.