According to the requirement of the user my company has some of water pump or chemical pump deserved to use explosion proof motor. Accordingly, company sale system and a few questions that the personnel outside be stationed in often asks about explosion proof electric machinery the respect to technical ministry. Talk about explosion proof electromotor to concern an issue slightly now.

A lot of branches such as oil, chemical industry, coal, in its the likelihood in yard place and manufacturing process exists Yi Xi explodes easily the material such as gas, liquid, dust (explode easily material has hundreds to plant) . It is dangerous that these materials and air mix to explode to have sexual mixture, make all round the hazardous area that the space makes different pitch. Once be put in ignition source in these places, cause the casualty that burn and explodes possibly, cause the huge loss of life property. We often hear such-and-such colliery fire damp explosion is this kind of accident. To prevent the happening of explosive accident, the electric product that these man-trap use if: Should use country of special structure classics electromotor, electric switch, illumination luminaries, phone to permit production explosion proof product, with respect to electromotor character, colliery well falls to use explosion proof electric machinery entirely almost, motor is used in petrifaction industry place in, explosion proof electric machinery nods 50 ～ 80% .

1, Hazardous area classification

The frequency that appears according to volatile gas atmosphere and duration are man-trap cent the following area:

0 areas: Volatile gas atmosphere appears continuously or reserve the room that be in for long;

1 area: When moving normally, the likelihood appears the place of volatile gas atmosphere;

2 areas: When moving normally, appear impossibly explosive gas atmosphere, if appear,also be occurrent, and be the place that short time exists only.

2, The type of explosion proof electric machinery

Electric machinery of alleged explosion proof, point to namely take step of a few explosion proof to its, it is in order to ensure in hazardous area but the electric machinery that safety uses.
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