Combined stop and control valve
US4121617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1976 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Apr 13, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87917
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A combined stop and control valve for incorporation into a pipe carrying the working medium of a turbo-machine and in particular a steam turbine has the respective bodies of the stop and control valves arranged independently of each other in a common housing which is provided with co-axially arranged valve seats located adjacent one another at the flow opening of the valve cage. The body of the control valve has a bell-shaped configuration into the hollow cavity of which the body of the stop valve travels co-axially, and both of the valve bodies are rigidly supported in their end positions against the valve housing. The valve seat is provided with a throttle collar around which circumferentially spaced slots are distributed, the inner diameter of the collar being approximately equal to that of the control edge of the control valve body. The body of the stop valve has a conical seating surface which together with the inner circumference of the control valve body forms an annular gap tapering in the flow direction of the working medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.