Self-sealing inflating device for helium storage tank

The utility model discloses a self-sealing inflating device for a helium storage tank, which relates to the technical field of helium storage tanks and comprises a storage tank body, an inflating nozzle is arranged at the top of the storage tank body, a screw rod is movably connected to the top end inside the inflating nozzle through a bearing, a threaded sleeve is sleeved at the bottom end of the periphery of the screw rod, and the threaded sleeve is spirally connected with the screw rod. A threaded sleeve is arranged at the bottom of the charging connector, a first sealing piston is fixedly connected to the bottom of the threaded sleeve, a second sealing piston is arranged at the bottom end of the interior of the charging connector, and a reset spring is arranged at the bottom of the second sealing piston. The top end and the bottom end of the interior of the charging connector are sealed in a double-sealing mode, so that the sealing effect of the interior of the charging connector is improved, the double-g