FIELD: heat power engineering.
SUBSTANCE: invention can be used in steam-turbine plants of thermal power stations. Proposed stop-and-regulating valve has steam box, flow energy converter and balanced regulating and stop valves installed coaxially at different sides of flow energy converter for complete or partial shutting off of flow. Said valve contains shaped shutoff cups, relief chambers and drive rods. Chambers communicate with outer surface of shutoff cups through channels. Flow energy converter is made in form of confusor. Regulating and stop valves are installed according from side of inlet and outlet holes of confusor in direction of flow. Outlet holes of through channels are uniformly spaced shaped surface of shutoff cups of both valves, being arranged lower than their seat diameters.
EFFECT: reduced maximum velocities in passage part of valve, and disturbances and pressure fluctuations in flow, hydraulic resistance of valve, dynamic loads on valve design elements, increased reliability of valve.
4 cl, 4 dwg
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