What is the scope and structure of the cartridge heater?
1. Small diameter, 3-25MM can be achieved.
2. The length is not limited, 20-2000MM can be achieved.
3. High power, 2-5 times the power of normal tubular heater, which can be achieved (surface area 20 watts/square centimeter), and even abroad (surface area 60 watts/square centimeter).
4. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, long service life, no pollution, and low price. At the same time, it saves electricity and is safe to use. It can be bent into various shapes, light and easy to disassemble .
The calories per unit plane or the surface of the object can be increased tenfold. Then use a tube shrinking machine to reduce the diameter of the tube to make the oxygen compound media tight (the density reaches more than 3.3g/cm3), to ensure that the heating wire is isolated from the air, and the core position does not shift and touch the tube wall. The life span of use can be correspondingly increased to more than 10 years. Compared with the electric heating element of the same kilocalorie, the tubular heater can save 5 percent of the electric heating material, and the heating rate can reach more than 90 percent.
The typical structure of a cartridge heater (the most popular structure) is the same as that of an tubular heater. It is generally composed of 5 parts: insulators, sealing materials, lead rods, supplementary materials, heating wires, metal sheathing tubes, and terminals. so. The spiral heating wire and the lead-out help are located in the center of the metal sheath. Its manufacturing process is to penetrate the spiral heating wire into seamless steel pipe, copper tube or aluminum tube. The gap is evenly supplemented by a multi-tube supplement machine. Oxygenation medium for heat conduction, such as the formation of crystalline magnesium oxide powder (aluminum oxide or clean quartz sand can also be used).