▎ 摘　　要

NOVELTY - The utility model claims a graphene preparation device technology field, especially relates to a scale preparation device of elastic air tight piece and CVD deposition graphene. the elastic air-tight piece is set at the outlet end of the preparation chamber; the elastic air-tight piece is hermetically connected with the outlet end of the preparation chamber; the elastic air-tight piece is provided with a conveying belt component provided with a passage for the conveying belt component to pass through; the elastic airtight assembly further comprises a fastening part; the fastening part applies pressure to the elastic air tight piece, so as to control the distance between the channel and the conveyor belt assembly. applying pressure to the elastic air tight piece by the tightening part; it can change the distance between the conveying belt assembly and the channel; the side wall of the channel is tightly jointed with the conveying belt assembly, making the preparation chamber form a sealing space. when the operation of the conveyor belt assembly, adjusting the pressure of the fastening member to the elastic air-tight piece. The distance between the conveyor belt assembly and the passage is increased. the channel has a space for running the conveyor belt assembly, so that the conveyor belt assembly can normally operate.