▎ 摘　　要

NOVELTY - The utility model claims a new-type pipeline fire retardant ring, comprising a bottom plate; an expansion core layer and a gear; the lower end of the bottom plate is provided with a rubber pad, and the bottom plate centre are symmetrically arranged; the upper end of the bottom plate is provided with a reinforcing block; and one end of the reinforcing block close to each other is provided with a driving box; one side of the driving box close to each other is provided with a shell; one side of the shell close to each other is provided with a graphene layer; one end of the graphene layer close to each other is provided with an expansion core material layer; one end of the expansion core material layer close to each other is provided with a polycarbonate layer; the upper end of the bottom plate corresponding to the shell is provided with a sliding groove one. When using the utility model, the clamping block is inserted in the clamping groove, the shell is closed; the sealing baffle is jointed with the inner wall of the clamping groove to realize the sealing effect; the starting motor drives the rotating shaft and the gear to rotate; the gear drives the rack and the shell to move left and right; the shell expands and reduces the movement; The invention realizes the seamless installation of the fire retardant ring on the pipelines with different sizes and apertures.