How can the protection grade of explosion-proof electric hoist be divided?

　　More and more coal mine enterprises or oil exploration projects will choose explosion-proof electric hoist in the project. Before use, you should first understand the level of explosion-proof, in order to choose your product in the procurement process, but also to ensure the safe operation of the use process.

　　According to the national standard "explosion-proof electric hoist GB10222-2001 explosion proof wire rope electric hoist" GB12476, 1-2000 ", explosive dust environment with explosion-proof electrical equipment, explosion-proof electrical equipment dust" GB3836, 1-2000 "electrical apparatus for explosive gas atmospheres - flameproof electrical apparatus" d "" provisions, made explosion-proof explosion-proof wire rope DIIBT4, DIICT4 and DIPA20TAT4 electric hoist, dangerous places applicable dangerous places and factories in factory explosive gas mixture with explosive dust mixed goods. The main body can be suspended on the I-beam track for straight line or curve operation.

　　Explosion-proof electric hoist is mainly divided into II A, II, B, II, C three protection level, temperature group for the T1-T4 group of flammable gas or steam and air composition of explosive gas mixture place.

　　Explosion proof electric hoist can be divided into B class and C class. Explosion proof electric hoist is generally applicable in 1 districts and 2 districts. Explosion-proof electric hoist applicable temperature, mainly from T1-T6 to T6, this level is the maximum temperature limit. For example, "DIICT4" stands for: D stands for flameproof type. II stands for class II explosion proof, that is, factory explosion-proof. C stands for C grade explosion protection zones, which are used in the most dangerous areas. T4 stands for temperature groups. At present, explosion-proof electric hoist with more DIICT4 class.

　　Please refer to the following classification, classification and classification of common dangerous gases.

　　Dangerous gas type EX IIBT4

　　Ethane, propane, butane, heptane, ethylene, carbon monoxide, gasoline, acetone, styrene, toluene, benzene, methanol, ethanol, vinyl chloride, acetaldehyde and so on. EX IICT4

　　Hydrogen, water, gas, and gases other than EX and IIBT4