Reducing station having a safety function in a negative direction of action
US5152317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Sep 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7761
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reducing station has a safety function in a negative direction of action for metering energy flows in the form of gases, steam or water, in particular in thermal or industrial power plants. An operating leg of a servo valve is supplemented by at least one further safety leg of displacing a first spindle section carrying a restrictor body at one end, into a closed position. The displacement is effected as a function of an applied pressure-monitor tripping signal. A second spindle section is coupled to the other end of the first spindle section through preloadable springs and non-self-locking, securely brakeable safety-spindle thread stages. The second spindle section has a spindle drive which transmits an axial thrust or pull to the first spindle section through the securely braked safety-spindle thread stages, in a regulating mode. In a tripping mode, the second spindle section forms an abutment for the movement of the first spindle section with the restrictor body into a desired, closed position. The movement is released by the safety spindles. At least two safety legs each have one non-self-locking safety-spindle drive. Both safety legs can act on a rocker-like, two-armed safet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.