LOCKING UNIT OF PIPELINE FITTING WITH CHANGEABLE SEALING RINGS Russian patent published in 2008 - IPC F16K3/12 F16K3/02 F16K1/46 

FIELD: pipeline fitting, namely locking unit used in oil production, petrochemical and other branches of industry.

SUBSTANCE: locking unit of pipeline fitting with changeable sealing rings includes movable member and stationary member. Said members are mutually engaged at sealing locking unit by means of sealing fields. On inner surface of changeable sealing ring of movable member and on outer surface of changeable sealing ring of stationary member annular grooves are formed. Said grooves are matched with reciprocal grooves on mutually turned surfaces of said members and they are provided with cutouts through which stops are mounted. Said stops are in the form of matched grooves and provided on their one end with bent portion and on opposite end with notch. Flat lateral surfaces of stops are inclined one to other and they engage with lateral surfaces of matched annular grooves.

EFFECT: increased degree of maintainability of pipeline fitting, shortened time period for restoring its maintainability, increased useful life of fitting.

2 cl, 7 dwg