Quick screening device for gravelly soil particle composition in engineering geological environment survey

The utility model relates to the technical field of gravelly soil particle composition fast screening devices, in particular to a gravelly soil particle composition fast screening device in engineering geological environment investigation, which comprises a base, a screening device is arranged on the upper end face of the base, the screening device comprises a U-shaped frame, and a screening hopper is movably connected in the U-shaped frame through a bearing. The lower end face of the U-shaped frame is fixedly connected with an L-shaped first rack, the upper end face of the base is fixedly connected with a supporting plate, an air cylinder is installed on the right end face of the supporting plate, the output end of the air cylinder penetrates through the supporting plate and is fixedly connected with a second rack, and the outer wall of the second rack is in meshed connection with a gear. Through cooperation of an air cylinder, a first rack, a gear, a second rack, a U-shaped frame and a screening hopper, bro