ANGLE COCK OF BRAKE MAIN LINE Russian patent published in 2002 - IPC

FIELD: railway transport; pneumatic brake main lines. SUBSTANCE: proposed angle cock of brake main line has body 1 with shutoff member open position seat 2 and shutoff member closed position seat 3. Shutoff member 4 is made in form of two-seat plate gate 5 with deflector 6 and pusher 7 provided with sealing rings 8 and 0. Cock has shutoff member drive 10 and handle 12. Plate gate 5 is made in form of shell 28 closed from side of pusher 7 and is provided with flexible element 26. First sealing ring 8 is arranged in space 29 of plate gate 5 between flexible member 26 and deflector 6 and is installed for communicating space 29 of plate gate 5 with brake main line and for axial displacement along shell 28 and along deflector 6 under action of flexible element 26 and working medium of brake main line to provided hermetic closing of shutoff member closed position seat 3 and its return in initial position, when required. Shutoff member 4 is made sectional, consisting of pusher 7 of plate gate 5 and deflector 6 provided with shank connected to each other. Sealing rings 8 and 9 of plate gate 5 are made of polyurethane. EFFECT: prevention of influence of wear of plate gate parts and shutoff member parts onto sealing of angle cock of brake main line in closed position of shutoff member with preservation of all coupling and main dimension. 8 cl, 3 dwg