QUICK-DETACHABLE JOINT FOR HIGH-PRESSURE PIPE LINES Russian patent published in 1997 - IPC

FIELD: quick-detachable joints of high-pressure flexible pipe lines. SUBSTANCE: device has two coupling members connected by shut-off bush which include two main and two differential movable seats. One coupling member is provided with differential movable seat where movable valve is fitted. Movable is made in form of connecting pipe union. Other member of coupling is made in form of connecting pipe union and is immovable connected with valve provided with movable spring-loaded differential seat. Engageable surfaces of valves and coupling members are matting in configuration at intersection at moment of coupling. EFFECT: avoidance of spillage of working fluid at moment of uncoupling parts of joint; reduced effort required for coupling parts of joint and stability of working fluid flow at pressure fluctuations in system. 2 dwg