Powder material air extractor

The invention relates to the field of packaging equipment, and particularly discloses a powder material air extractor which comprises a frame, a metering scale with a collecting hopper, a spiral discharging pipe and a start-stop mechanism, and a hopper lifting device with a movable hopper connecting seat, a bagging hopper, a bag opening mechanism, a bag clamping mechanism, a limiting sensor assembly and a bag opening position sensor. And the air exhaust lifting device is provided with an air exhaust pipe connecting seat and an air exhaust pipe group. The air exhaust lifting device with the air exhaust pipe set is arranged in the rack, after a bag opening mechanism of the bucket lifting device opens a bag and the bag is clamped by a bag clamping mechanism 34, the air exhaust pipe set extends into a packaging bag to exhaust air of the packaging bag, a spiral discharging pipe is further arranged in the metering scale, and therefore the packaging bag can be discharged through the spiral discharging ...