Explosion-proof motor is a kind of motor that can be used in flammable and explosive plant, and it does not produce electric spark during operation. The explosion-proof motor is mainly used in coal, petroleum, natural gas, petrochemical and chemical industry. In addition, it is also widely used in textile, metallurgy, city gas, transportation, grain and oil processing, paper making, medicine and other departments. As the main power equipment, the explosion-proof motor is usually used for driving pumps, fans, compressors and other transmission machines. With the development of science and technology and production, the place of explosion danger is also increasing. For example, the production of edible oil is used in traditional pressing process, after 1970s, China began to introduce foreign advanced technology of oil extraction, but this process should be used in the chemical solvent hexane, hexane is flammable and explosive substances; oil extraction plant therefore became explosive dangerous places, need to use explosion-proof explosion-proof motors and other electrical products. In addition, in recent years, the rapid development of China's highways, a large number of fuel gas stations, also provide a new market for explosion-proof motor.