Gas filling protective cover

The utility model discloses a gas filling protective cover, which is used for isolating a gas storage tank and comprises an outer container, the outer container is a cylinder with two open ends, the gas filling protective cover further comprises an inner container, an isolating pipe, a top plate and a bottom plate, the inner container is a cylinder with two open ends, the diameter of the inner container is smaller than that of the outer container, the height of the inner container is the same as that of the outer container, and the inner container and the outer container are concentrically arranged. The top plate and the bottom plate are respectively arranged at the tops and the bottoms of the inner container and the outer container; the outer container, the inner container, the top plate and the bottom plate are welded into a sealed annular cylinder; the isolation pipe is vertically arranged on the inner side of the inner container and covers the whole inner cylindrical surface, the isolation pipe is a hollo