Material returning prevention device of discharging machine

The utility model discloses a material returning prevention device of a discharging machine, which comprises a supporting mechanism used for supporting the material returning prevention device, a control mechanism used for controlling the operation of the material returning prevention device, a placing mechanism used for placing a material barrel, and a lifting mechanism used for adjusting the height of a closing plate, the control mechanism is installed on the supporting mechanism, the placing mechanism is fixed above the supporting mechanism, the lifting mechanism is arranged on one side of the placing mechanism, the pressurizing mechanism is used for pressurizing the interior of the charging barrel, the sealing mechanism is used for sealing an opening of the charging barrel, the pressurizing mechanism is fixed on the lifting mechanism, and the lifting mechanism is fixed on the lifting mechanism. And the sealing mechanism is mounted on the pressurizing mechanism. By arranging the sealing mechanism, after th