Explosion-proof Heavy Duty Electric Hoist

Explosion-proof Heavy Duty Electric Hoist

Heavy Duty Electric Hoist with a flameproof enclosure is called explosion-proof Heavy Duty Electric Hoist, This shell can withstand the explosion pressure of explosive gas mixtures, to prevent the spread around the outer shell.

The essence of the explosion is a vigorous combustion phenomenon, that is, the rapid spread of the flame, the heat from the combustion products quickly passed to the unburned mixture.

By testing the process of burning a flame in a pipe, it was found that, During combustion, the heat of the product is transferred to the tube wall in addition to the unburned mixture, and some of the heat is lost through the tube wall, so the burning speed near the tube wall is slowed down and the speed is almost zero. When the diameter of the tube is small to a certain extent, the velocity of flame propagation is reduced to zero. This is the principle of flame extinguishing in a tube, and this diameter is a critical diameter. Later, through a large number of standard sphere tests, the principle of gap explosion protection was studied successfully, which was applied to the explosion-proof structure of electrical equipment and became the current explosion-proof Heavy Duty Electric Hoist.

Different kinds of explosive mixture under certain initial temperature and pressure, have their own explosion concentration. Usually expressed as a percentage of volume. Also divided the upper limit concentration and the lower limit concentration, in between before having the danger of explosion, the lower limit of concentration of the starting conditions of the dangerous situation of the explosion.