SEALING DEVICE FOR PIPE LINE Russian patent published in 1998 - IPC

FIELD: sealing-up gas lines of any systems. SUBSTANCE: sealing device includes insert with circular projection formed by lengths narrowing and widening in longitudinal section. Blank made from flexible material is fitted inside insert on side of end adjoining the widening section of projection with taper shoulder. Device is also provided with catcher for blank which is mounted at radial clearance relative to inner surface of insert in widening section of circular projection. It is made in form of cylindrical sleeve coaxial relative to blank and having holes in its lateral wall. In the end face of catcher there is through hole coaxial to blank. Diameter of this through hole is lesser than diameter of lesser base of conical shoulder of blank. EFFECT: enhanced reliability of sealing. 2 dwg