Tubular electric heating elements are made of metal tubes as the outer shell (including stainless steel and copper tubes), and spiral electric heating alloy wires (nickel chromium, iron titanium alloys) are uniformly distributed along the core axis of the tube. The gaps between them are filled and compacted with oxygen magnesium oxide sand, which has excellent insulation and thermal conductivity. The ends of the tube mouth are sealed with silicone. This metal armored electric heating element can heat air, metal molds, and various liquids. In layman's terms, it is a carrier that converts electrical energy into heat energy. The usual method is to place an electric heating wire inside a metal pipe fitting, and add modified magnesium oxychloride powder with insulation around the electric heating wire to fix it and conduct heat. When using a single head electric heating tube, attention should be paid to several points to prevent leakage.
1. During storage and use, attention should be paid to the waterproofing of the wiring terminals of the single headed tube to avoid problems such as leakage and short circuit caused by water entering the electric heating tube.
2. When a single headed tube is heated as a solid object at room temperature, such as asphalt, paraffin, etc., the voltage should be reduced during initial heating and the electric heating should be turned on. When the solid dissolves, it should be raised to the rated voltage.
3. To distinguish between heating liquid and heating air, it is necessary to use a single head tube and avoid dry burning when boiling water. To heat water and dry it, the heating part should be placed purely in water to prevent the heating tube from exploding and leaking due to high temperature.
4. When using electric heating tubes for air heating, attention should be paid to the average arrangement of the electric heating tubes. The benefit of doing so is to ensure that the electric heating tubes have sufficient and average heat dissipation space, and to ensure the fluidity of the air as much as possible, increasing the heating rate of the single head tube.