END LOCK FOR CHAMBERS OF MANIFOLD PIPELINES Russian patent published in 2012 - IPC F16L45/00 F16J13/18 

FIELD: construction.

SUBSTANCE: lock comprises a body with a neck, a cantilever nozzle located inside, the diameter of which is equal to the chamber diameter, and a rotary cover, hingedly fixed on the cantilever nozzle with the possibility of reciprocal movement along the lock axis after cover rotation to matching of its axis with the body neck axis. The lock comprises a hydraulic drive arranged outside, in which in the system of working fluid supply to hydraulic cylinders there is a locking device, preventing unauthorised opening of the cover at the pressure in the chamber of more than 0.001 MPa arranged in the form of a discharge slide with a servo piston, the working cavity of which is connected with the inner cavity of the lock.

EFFECT: end lock makes it possible to increase operational resource of sealing elements, exclude manual operations when closing a lock, reduce length and metal intensity of a chamber.

3 cl, 5 dwg