Bottom inflation stirring device for flotation machine

The utility model discloses a bottom inflation stirring device for a flotation machine. The device structurally comprises a mounting plate, a motor, a power line, a central cylinder, an air outlet, acover plate, an air inlet pipe, an oxygenation pump, a switch valve, a main shaft rod, an impeller and a reinforcing mechanism, the reinforcing mechanism is arranged at the bottom end of the main shaft rod; an impeller is arranged on a main shaft rod; the inserted L-shaped connecting rod enters the inner side of the through hole; the bottom of the L-shaped connecting rod can be pulled; the L-shaped connecting rod drives the square rod to move downwards; the square rod pulls the first spring to stretch; then, the L-shaped connecting rod is rotated by 180 degrees; the clamping blocks and the clamping grooves in the bottom of the impeller are located on the same vertical end face, then pulling force on the L-shaped connecting rods is canceled, the L-shaped connecting rods are made to move upwards under the elastic fo