▎ 摘　　要

NOVELTY - The device has a fixed block (25) whose side is fixedly connected with a guide rod (26). A guide sleeve (27) is sheathed on the surface of the guide rod. The bottom of the top guide sleeve is movably connected with a support rod (28) through a rotating shaft. The bottom of the support rod is fixedly connected with the top of a screen plate (23). The bottom of the bottom guide sleeve is movably connected with an electric telescopic rod (29) through a rotating shaft. The bottom of the electric telescopic rod is fixedly connected with the bottom of the inner cavity of the box housing (19). USE - Sieving device for graphene purification. ADVANTAGE - The sieving device has the multiple screening of graphene, high screening efficiency and strong applicability. The problem that the existing graphene screening device only screens graphene through a single screening plate and cannot screen graphene multiple times is solved. Multiple screening is performed. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for using sieving device for graphene purification. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the sieving device for graphene purification. Box housing (19) Screen plate (23) Fixed block (25) Guide rod (26) Guide sleeve (27) Support rod (28) Electric telescopic rod (29)