Iron ladle capping energy-saving structure

The invention discloses an iron ladle capping energy-saving structure which is characterized in that a hydraulic supporting rod is mounted on a rotating arm for capping an iron ladle to support the weight of the rotating arm and the weight of the ladle cover, and the hydraulic supporting rod comprises a fisheye connector, a piston rod, a piston rod seal, a sleeve and a connector which are sequentially connected from top to bottom; the piston structure compresses and releases the hydraulic supporting rod in the process of opening and closing the ladle cover, and potential energy of falling of the ladle cover is converted into elastic potential energy of the hydraulic supporting rod when the ladle cover is opened. And in the cover closing process, elastic potential energy of the hydraulic supporting rod is converted into potential energy of the iron ladle cover. The energy for opening the cover is stored, the energy is released when the cover is closed, the cover of the iron ladle can be opened and closed only