THREADED DETACHABLE CONNECTION Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: ring spacer is interposed between butted units of the outer and inner branch pipes. A coupling nut forms a spring clutch together with the ring spacer. A split spring ring is positioned in the space which is formed with ring grooves on mating surfaces of the inner branch pipes and the coupling nut. Projections are made on the outer surface of the inner branch pipe. A ring groove of L-shaped cross-section is made on one of the projections. The ring spacer is constructed as a metal race having outer heat insulating coating. The ring spacer is positioned above the coupling nut and coupled with it by a slot connection. The coupling nut is provided with a cylindric shank having the inner ring groove of rectangular cross-section and interacts with the outer branch pipe by one of the sides over the thread and with answered face of the ring groove through the split ring. EFFECT: enhanced reliability. 3 cl, 9 dwg