The basic composition of single-head electric heating tube

Single-head electric heating tube is a kind of electric heating tube (tubular electric heating element), model is M3.
The typical structure (popular structure) of single-head electric heating tube is the same as that of electric heating tube, generally composed of 5 parts: insulator, sealing material, lead rod, filler, electric heating wire, metal sheath tube, terminal. The spiral electric heating wire and the lead rod are located in the center of the metal sheath tube. Its manufacturing process is to insert the spiral electric heating wire into the seamless steel tube, copper tube or aluminum tube, and the gap is evenly filled with an insulating and thermally conductive oxidizing medium such as crystalline magnesium oxide powder (alumina or clean quartz sand can also be used) through a multi-tube filling machine. Then use a tube shrinking machine to reduce the tube diameter to make the oxide medium dense (density reaches more than 3.3g/cm3), ensure that the electric heating wire is isolated from the air, and the center position does not shift and touch the tube wall. In this way. The heat per unit area can be increased by more than ten times. The service life can also be correspondingly increased to more than 10 years. Compared with electric heating elements of the same heat capacity, tubular electric heating tubes can save 5% of electric heating materials, and the thermal efficiency can reach more than 90%.