A inert gas fills protection device for double skin duct

The utility model discloses an inert gas fills protection device for double skin duct, its the side seal portion of aerifing and exhaust side sealing that includes the alternate segregation is aerifyd side seal portion and is equipped with and aerifys the hole, the exhaust side sealing is equipped with the exhaust hole, aerify side seal portion with the exhaust side sealing is flexible annular ring, along radially being equipped with an opening on the circle body of flexible annular ring. Compared with the prior art, the utility model discloses an inert gas fills protection device for double skin duct can effectively set up the interim airtight space of little volume, shortens the time of inflating to reduce the quantity of gas by a wide margin, improves the efficiency of construction, compression construction cost, and airtight effect can be guaranteed to hydrous water solubility adhesive tape, utilize the characteristics of silica gel material high elasticity high tenacity, can take out from the outer tube