SAFETY VALVES SWITCHING APPARATUS Russian patent published in 2007 - IPC F16K11/87 F16K5/06 

FIELD: pipeline fittings, namely switching apparatuses of safety valves used when it is necessary to switch off one of two safety valves and simultaneously without interruption of working process to switch other safety valve in order to change direction of fluid flow.

SUBSTANCE: switching apparatus of safety valves includes two switching devices and central branch pipe for discharging products to be drained. Said switching devices are arranged one over another. One switching device includes central branch pipe for inlet of drained products and two lateral branch pipes communicated with inlets of safety valves. Other switching device includes two lateral branch pipes communicated with outlets of safety valves. Spindles of switching devices are mutually joined through switching mechanism. Each switching device is in the form of three-way ball cock with taps. Cocks are arranged along the same axis one over other. One cock is turned relative to other cock by 180°. Spindles of cocks are arranged along the same axis one in front the other and they are joined through switching mechanism. The last has sleeve with rotary handle. Ball of one cock is turned relative to ball of other cock by 180°.

EFFECT: prevention of pressure increase in vessels, pipelines and other apparatuses using standard parts and units.

3 dwg