PIPE JOINT WITH VALVE CASING Russian patent published in 2012 - IPC F16L21/08 

FIELD: construction.

SUBSTANCE: pipe joint for stretch-resistant connection of an inserted pipe end to a connection coupling with a retention ring covering the inserted end along the perimetre and installed in the inner slot of the connection coupling. The inserted end of the pipe protrudes beyond the retention ring in direction of the pipe end insertion onto the protruding part, at the same time next to the inner slot at the distance from it there is a sealing ring installed in direction of the pipe end insertion in a circular slot, preferably this is a collar sealing ring covering the inserted end along the perimetre. The connection coupling on the part of the coupling section perimetre with an inner slot has a slot-like groove in the wall that allows for radial insertion of the retention ring. The groove in the wall occupies a sector of cross section, the inner angle of which makes less than 180°.

EFFECT: improved connection.

34 cl, 8 dwg