Fire control ventilation multipurpose double speed centrifugal fan that discharges fume

The utility model discloses a fire control ventilation multipurpose double speed centrifugal fan that discharges fume, the power distribution box comprises a box body, the box includes air intake, air outlet, install the spiral case in the box, install the motor on the box, install the main shaft in the spiral case, install the impeller on the main shaft in the spiral case, install down taper sleeve formula band pulley on the main shaft outside the box, the motor links to each other with the transmission shaft, install epicone shell type band pulley on the transmission shaft, epicone shell type band pulley passes through the belt and taper sleeve formula band pulley is continuous down, just epicone shell type band pulley, belt, lower taper sleeve formula band pulley are all installed in the box outside. A fire control ventilation multipurpose double speed centrifugal fan that discharges fume, its simple structure, simple to operate, external its radiating effect of motor is good, the easy ventilation, the maintenance of being convenient for, the cooperation use of rain -proof cover of motor and the rain -proof cover of band pulley can prevent effectively that the motor is influenced by the rainwater.