Explosion-proof electric single-beam crane has the characteristics of reasonable structure, beautiful appearance and strong explosion-proof performance. The whole machine is used with HB type electric hoist, which is a kind of light and small lifting machine. It has a weight of 1t - 20t, with a span of 7.5-28.5m, and the working level is below A3. Generally, it is divided into gas explosion BT4, CT4, and coal - safety explosion protection according to different explosion-proof requirement