Electric heat pipe, also known as heating pipe, heating pipe, the scientific name of tubular electric heater element, is to put in the metal tube coiled heating wire (resistance wire), and filling in its surrounding and void parts with good heat resistance, thermal conductivity and insulation of insulating powder (MgO), the two ends of the heating wire with lead rod or lead-out wire connection. The utility model has the advantages of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, simple installation and long service life. It is widely used in various nitrate tank, water tank, oil tank, acid-base tank, fusible metal melting furnace, air heating furnace, drying furnace, drying box, hot pressing die and other devices. So what are the precautions when using the electric heat pipe? ?

1. Components are allowed to work under the following conditions:

A. Relative humidity of air is not more than 95%, no explosive and corrosive gases. ?

B. The working voltage shall not exceed 1.1 times the rated value, and the housing shall be effectively grounded. ?

C. Dielectric strength of insulation resistance (> 1M): 2KV/1min. ?

2. Electric heat pipes should be positioned and fixed. Effective heating areas should be immersed in liquid or metal solids. Air burning is strictly prohibited. When it is found that there are scales or carbon deposits on the surface of the pipe body, it should be cleaned up and reused in time to avoid heat dissipation and shorten the service life.

3. When heating fusible metals or solid salts of nitrate, alkali, leaching, paraffin, etc., the service voltage should be lowered first, and only after the medium melts, can it rise to the rated voltage.

4. When heating the air, the elements should be arranged evenly and crosswise, so that the elements have good heat dissipation conditions, so that the air flowing through can be fully heated.

5. Safety measures should be taken into account when heating nitrate to prevent explosion accidents.

6. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media and water; the wiring should be able to withstand the temperature and heating load of the wiring part for a long time, and the wiring screw should be tightened to avoid overexertion.

7. Components should be stored in a dry place. If the insulation resistance is lower than 1M for a long time, they can be dried in an oven at about 200 C or heated by lowering the voltage until the insulation resistance is restored.

8. Magnesium oxide powder at the outlet of the electric heat pipe should be avoided from being infiltrated by pollutants and water in the use place to prevent the occurrence of electric leakage accidents.