▎ 摘　　要

NOVELTY - The utility model belongs to the graphene lubricating oil production device technology field, specifically claims a graphene lubricating oil grading filter device, comprising a filter cylinder; the middle part of the filter cylinder is provided with an opening; the filter cylinder is provided with a fine filter screen; the fine filter screen is sleeved with a coarse filter screen; the lower side of the opening is provided with a hopper-shaped discharge pipe; the fine filter screen and the lower side of the coarse filter screen are connected with a first annular cushion block; between the fine filter screen and the coarse filter screen is connected with a first sealing ring table; the lower side of the coarse filter screen and the inner wall of the filter cylinder are connected with a second annular cushion block; between the coarse filter screen and the inner wall of the filter cylinder is connected with a second sealing ring table; the upper surfaces of the first sealing ring table and the second sealing ring table are provided with a connecting rod; the filter cylinder is provided with a main cylinder cover; the main cylinder cover is fixedly connected with the filter cylinder upper end screw thread; the filter cylinder is provided with a liquid inlet pipe; the bottom between the fine filter screen and the coarse filter screen is provided with a first annular material discharging cover; the bottom between the filter cylinder and the coarse filter screen is provided with a second annular material discharging cover; the filter cylinder is further provided with an auxiliary cylinder cover.