▎ 摘　　要

NOVELTY - The device has lower high pressure oil pipe that is installed on the upper end of the oil cylinder end cover. The end cover is connected with the oil cylinder by fastening device. A sealing gasket is installed between the fastening element and the oil cylinder. An oil cylinder piston is provided on the middle upper end of the oil cylinder and connected by the sealing ring. USE - Device for preparing grapheme. ADVANTAGE - The large area of graphene can be obtained by providing simpler structure. The batch production of the grapheme can be realized effectively.