▎ 摘　　要

NOVELTY - The utility model claims a vacuum defoaming device for preparing graphene, comprising a defoaming tank body, an umbrella frame, a cover body, a feeding pipeline and a circulating pipeline; the umbrella frame is set in the deaeration tank body; the cover body can be hermetically connected with the de-foaming tank body; the inner part of the cover body is provided with a pressurizing extrusion material mechanism the inner side of the cover body is provided with a material extruding opening connected with the pressure-increasing extruding material mechanism the feeding pipeline and the circulating pipeline are connected with the pressurizing extruding material mechanism the cover body; the bottom of the deaeration tank body is provided with a discharge hole; the circulating pipeline is provided with a circulating pump; the circulating pipeline is connected with the discharge hole. The solution uses a circulating pipeline design, the solution is cycled on the umbrella cover for defoaming in the de-foaming irrigation, it has obvious de-foaming effect, with high-efficiency and stable advantage.