Transition steel ring for ultra-large block type steel sleeve

The utility model relates to the technical field of tunnel construction, in particular to a transition steel ring for an ultra-large partitioned steel sleeve, which comprises steel ring scattered blocks, the steel ring scattered blocks are connected end to end to form a circular ring, the steel ring scattered blocks are connected with the steel sleeves, butt joint rings are arranged at the edges of the steel sleeves, and the steel ring scattered blocks are mounted on the butt joint rings at the two connected steel sleeves. When the steel sleeve is installed, a plurality of steel ring scattered blocks are installed at the connecting position of the steel sleeve, due to the fact that a fixing mechanism with good sealing performance is arranged, the middle of a movable plate can be moved only by rotating a twisting column, a positioning column is inserted into a positioning hole, stable installation can be achieved, operation is easy, and when the movable plate moves, an air storage bag is squeezed, and the safe