Sealed device of being qualified for next round of competitions of transformer

The utility model discloses a sealed device of being qualified for next round of competitions of transformer, including copper cap, copper post, wiring board, seal ring, the copper cap be type lower part opening drum structure, the protruding type upper portion inner wall of copper cap be provided with the screw thread, copper post one end outer wall be provided with the screw thread that closes with the thread to match of copper cap inner wall and run through seal ring with copper cap spiro union, the copper post other end be provided with with wiring board drum position inner wall matched with copper male screw and through copper male screw spiro union on the wiring board, overcome prior art's weak point, utilize the copper post, the wiring board, helicitic texture between copper cap three comes the cooperation to connect, and cooperate seal ring to seal between wiring board and copper cap, it appears to avoid conductor fluid's the infiltration condition appearing because seal badly, the installation of structure had both been taken into account, dismantle, the convenient principle of rainwater, good sealed electric property effect has been reached again, the total has reasonable in design, economical and practical's characteristic.