Airtight type adapter flange

The utility model provides an airtight type adapter flange belongs to oil exploration technical field, and its structure includes fixed connection's ectosome flange and endosome flange, encloses flange hole passageway in endosome flange center has been seted up, endosome flange outer wall, endosome flange hanging wall, endosome flange lower wall enclose in and set up the chamber into circular airbag between the passageway of flange hole, the circular airbag intracavity is provided with cyclic annular elasticity gasbag, the intercommunication has the air cock connecting leg on the cyclic annular elasticity gasbag, encloses the inner circle of flange hole passageway and cyclic annular elasticity gasbag in center pin spare runs through jointly, cyclic annular elasticity gasbag fills through the air cock and makes cyclic annular elasticity air bag inflation force the extrusion of cyclic annular elasticity gasbag inner circle to hang fastening center pin spare into high -pressure gas. This airtight type adapter fl