Dampproofing seal structure of milk power pail pack

The utility model provides a dampproofing seal structure of milk power pail pack, including packing the staving, installing in the plastic seal enclosing cover of packing staving top, the packing staving is cylindrical, and its up end is equipped with circular bung hole, and the bung hole inboard is equipped with once only seals up the aluminium foil, the bung hole is equipped with one and is located the inside circular plastic seal inner cup of plastic seal enclosing cover, plastic seal inner cup periphery is the rand that a cross -section is Z shape, and the outside of rand is equipped with yi katai, and the rand utilizes katai to fix on the interior limit of circular bung hole, and the rand center be the lid movable plate of being indecisive and changeable, utilizes corrugated clamping ring to be connected between approximately be indecisive and changeable movable plate and the rand, wherein, the utility model discloses a lid at plastic seal inner cup middle part is indecisive and changeable and is utilize