▎ 摘　　要

NOVELTY - The utility model claims a method for preparing three-dimensional graphene kettle bottom valve mechanism with high precision, comprising a valve body, the inside of the valve body is provided with a blanking cavity; the lower surface of the valve body is provided with a mounting groove; the inside of the mounting groove is provided with a filling layer, the filling layer is glidingly connected with the outer surface of the screw rod, the lower surface of the valve body by bolt is fixedly installed with an end cover, the lower surface of the screw rod is fixedly connected with a connecting seat, the connecting seat on two side surfaces of end is provided with a clamping groove; two sides of the lower surface of the connecting seat is provided with a connecting groove; the centre of the lower surface of the connecting seat is provided with a sliding groove, the upper end in the inner part of the sliding groove is fixed with a spring, the lower surface of the spring is connected with a connecting rod, the lower surface of the connecting rod is fixedly connected with a hand wheel, the two sides of the upper surface of the hand wheel is provided with a connecting block, the two ends of said hand wheel is hinged with a swinging rod. the high precision valve mechanism can greatly improve the safety and efficiency of the bottom valve.