Argon filling plugging device in welding of pipeline argon arc

The utility model relates to a pipeline welding technique field, in particular to argon filling plugging device in welding of pipeline argon arc. Be equipped with a circular rubber and fixed through bolted connection between per two circular iron sheets of the device, circular gluey skin external directly is greater than circular iron sheet external diameter, is connected through three bracing piece between two the circular iron sheets that link together of two circular iron sheets and other that link together, is equipped with the pore of ventilating on one side of wherein on two circular iron sheets and the circular rubber. The utility model discloses a shutoff aerifys fast, and the shutoff is effectual, guarantees argon filling volume minimizing, reduces the argon gas quantity to can guarantee welding quality, the installation is dismantled conveniently, the less investment. The argon filling volume is big in having overcome present pipeline welding construction, and welding quality is poor, can not obtain the not enough of qualified weld bond.