DIAPHRAGM-TYPE SAFETY DEVICE Russian patent published in 2003 - IPC

FIELD: mechanical engineering. SUBSTANCE: invention relates to valving and it can be used in pneumatic and hydraulic systems to control medium flows. According to invention diaphragm-type safety device contains housing, inlet and outlet branch pipes with flanges, bursting diaphragm hermetically isolating, in initial state, spaces of inlet and outlet branch pipes, cutting device spring-loaded towards diaphragm and furnished with breakable pin. Diaphragm is installed from outer side of inlet branch pipe flange and is secured over perimeter between two rings pressed to flange of inlet branch pipe. Cutting device installed in housing space communicating with space of outlet branch pipe is made in form of striker secured on end of cylindrical rod installed in through hole made in housing end face. Part of rod located in housing space is enclosed by limiter in form of two thrust bushings, cylindrical bushing placed in between and spring located between inner end faces of thrust bushings. Part of rod projecting from device housing is provided with through radial hole, being pressed to housing by bushing with slot. Breakable pin is fitted in radial hole of rod and slot of bushing. EFFECT: improved reliability of device in operation. 1 dwg