The spiral heating wire and lead out rod are located in the center of the metal protective sleeve

The spiral heating wire and lead out rod are located in the center of the metal protective sleeve

Stainless steel heating tube is made of metal tube as the outer shell (including stainless steel and copper tube), and spiral electric thermal alloy wire (nickel chromium, iron chromium alloy) is uniformly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide sand with good insulation and thermal conductivity. The ends of the tube mouth are sealed with silicone gel. This metal armored heating element can heat air, metal molds, and various liquids.

The typical structure of stainless steel heating tubes generally consists of five parts: insulators, sealing materials, lead out rods, fillers, heating wires, metal protective sleeves, and terminals.

The spiral electric heating wire and the lead out rod are located in the center of the metal protective sleeve. The manufacturing process of stainless steel heating pipes is to thread the spiral electric heating wire into seamless steel pipes, copper pipes, or aluminum pipes. The gaps between them are evenly filled with insulating and heat-conducting oxide media, such as crystalline magnesium oxide powder (which can also be aluminum oxide or clean quartz sand), through a multi tube filling machine. Then use a pipe shrinking machine to shrink the diameter of the pipe, making the oxide medium dense (density above 3.3g/cm3), ensuring that the electric heating wire is isolated from the air, and the center position does not deviate and collide with the pipe wall. This way. The heat output per unit area can increase by more than ten times. The service life can also be correspondingly increased to over 10 years. Compared with electric heating elements with the same amount of heat, tubular electric heating tubes can save 5% of electric heating materials and achieve a thermal efficiency of over 90%.

Therefore, from the perspective of the structure of electric heating tubes, metal tubular electric heating tubes are currently widely used, with simple structures, reliable performance, and long service life as sealed electric heating elements. They can be successfully applied in industrial and household appliances, and their use is becoming increasingly widespread. I hope more users have a clear understanding of the structural principles of stainless steel heating tubes.

Www.superbheater.com