Kangtai Er imported original electric heating strip from the United States with medium to high temperature constant power explosion-proof electric heating strip

Tubular electric heating element (referred to as electric heating tube) is an electrical component that specifically converts electrical energy into thermal energy. It is made of metal tubes as the outer shell (including stainless steel and copper tubes), and spiral electric thermal alloy wires (nickel chromium, iron chromium alloy) are 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. This metal armored electric heating element can heat air, metal molds, and various liquids. Common electric heating pipes include finned electric heating pipes, Teflon electric heating pipes, quartz electric heating pipes, and so on. Due to its cheap price, convenient use, easy installation, and pollution-free, it is widely used in various heating occasions.

Devices such as metal melting furnaces, air heating furnaces, drying furnaces, drying ovens, hot pressing molds, etc.

Electric heating tubes are electrical components that specifically convert electrical energy into thermal energy. Due to their low price, convenient use, easy installation, and pollution-free nature, they are widely used in various heating situations.

Functional characteristics

Small size and high power [1]: The heater mainly uses bundled tubular electric heating elements. Fast thermal response, high temperature control accuracy, and high comprehensive thermal efficiency. High heating temperature: The maximum task temperature of the heater design can reach 850 ℃. The outlet temperature of the medium is average, with high temperature control accuracy. Wide usage limitations and strong compliance: This heater can be used in explosion-proof or ordinary places, with explosion-proof grades up to D Ⅱ B and C, and a pressure resistance of up to 20MPa. Long lifespan and high reliability: The heater is manufactured using extraordinary electric heating materials, with a low external power load and multiple maintenance measures, greatly increasing the safety and lifespan of the electric heater. Fully active control: Designed with a heater circuit according to requirements, it can easily achieve active control of outlet temperature, flow rate, pressure and other parameters, and can be connected to a computer network. The energy-saving results are obvious, and almost 100% of the heat generated by electrical energy is transferred to the heating medium.

structure

The typical structure of a metal tubular electric heating tube (the most popular structure) generally consists of five parts: insulator, sealing material, lead out rod, filling material, electric heating wire, metal protective sleeve, and terminal [1].

The spiral electric heating wire and the lead out rod are located in the center of the metal protective sleeve. Its manufacturing process involves threading the spiral electric heating wire into seamless steel pipes, copper pipes, or aluminum pipes. The gaps are evenly filled with insulating and thermal conductive 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 to make the oxide medium dense (with a density of over 3.3g/cm3), ensuring that the electric heating wire is isolated from the air and the center position does not shift 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 high heat capacity, tubular electric heating tubes can save 5% of electric heating materials, and the thermal efficiency can reach over 90%.