Explosion -proof electric gourd is 1 ton of 6 meters. Explosion -proof electric gourd is divided into steel wire rope and ring chain. Explosion -proof electric gourds are mainly divided into three and fourth -level explosion -proof according to the explosion -proof level. The three -level explosion -proof is only a motor part of explosion -proof, and the fourth level is a full explosion -proof. That is to say, the exposed explosion -proof parts of the gourd are made of special sparkless materials. Explosion -proof is more reliable. The BCD explosion -proof electric gourd, the explosion -proof levels are DIIBT4 and DII, respectively, and the structure is reasonable. One brake and motor are one. There is another safety brake on the roller. Safety brakes do not need electricity (pure mechanical), and are not affected by electricity. When a brake is working normally, the safety brakes do not work. , Safety brakes are braking immediately.