▎ 摘　　要

NOVELTY - The method involves providing suction pipe anti-blocking mechanism with an air outlet pipe communicated on surface of a suction pipe. Piston cylinders are fixed on the surface of a filter cartridge (81). A piston is slidably connected to an inner wall of a piston cylinder. A push cylinder is fixed at the bottom of the piston cylinder. The top portion of the push cylinder is fixedly connected with the bottom portion of the piston. A first check valve is fixed on the surface of the air outlet pipe. The surface of the air outlet pipe is communicated with an air inlet pipe. A second check valve is communicated with the surface of the air intake pipe. USE - Crushing method for graphene particle. ADVANTAGE - The whole filter cylinder can be driven to vibrate up and down and left and right at the same time through the arrangement of the two-way screening and filtering mechanism, so that the crushed graphene large particles are not prone to being blocked in the holes in the filter screen, so that the filter screen is not easy to block, and the screening efficiency is high. The graphene dust can be effectively centralized and recycled through the arrangement of the negative-pressure anti-leakage dust treatment mechanism. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the two-directional screening filter mechanism. Two-directional screening filtering mechanism (8) Filter cartridge (81) Rotating shaft (84) Filter screen (85) Two-directional driving motor (86) Crank rod (87) Rotating block (88) Fixing block (89) First bevel gear (810) Fixing frame (811) Rotating rod (812) Second bevel gear (813) Rotating plate (814) Rotating strip (815) Sliding block (816) Discharging pipe (817)