Negative-pressure automatic powder sampling machine

The invention provides a negative-pressure automatic powder sampler. The negative-pressure automatic powder sampler comprises a discharging hopper, a raising mechanism and an atomizing pneumatic mechanism, wherein the raising mechanism and the atomizing pneumatic mechanism are arranged at the bottom of the discharging hopper; the raising mechanism comprises a guide plate, a raising wheel and a conveying pipe, the conveying pipe is fixedly arranged under the discharging hopper, a raising plate is arranged on the circumferential side face of the raising wheel, a driving motor is arranged on the outer wall of one side of the conveying pipe, and the output end of the driving motor penetrates through the conveying pipe and is fixedly connected with the raising wheel; a driving motor drives a raising wheel to rotate, so that a raising plate on the raising wheel raises powdery materials accumulated on a material guide plate, the materials are atomized through an atomization pneumatic mechanism and then blown out, th