Labyrinth oil circulation exchanging structure of direct current casing pipe inflated with insulating gas

The utility model relates to a labyrinth oil circulation exchanging structure of a direct current casing pipe inflated with insulating gas. A paper oil insulation core is arranged in a winding metal pipe of the direct current casing pipe inflated with the insulating gas and the winding metal pipe is fixedly installed on a casing pipe installing flange. A current-carrying conduit transmitting a current is arranged in an inner hole of the winding metal pipe, and the current-carrying conduit and the winding metal pipe are fixedly connected through an upper end fastener and a lower end fastener of the winding metal pipe. A plurality of current-carrying conduit lower end oil duct holes and a plurality of current-carrying conduit oil duct holes are formed in the current-carrying conduit, and a plurality of winding metal pipe upper end oil duct holes and a plurality of winding metal pipe lower end oil duct holes are formed in the winding metal pipe. When the direct current casing pipe inflated with the insulating ga