System and method for detecting deterioration of a control valve
US11613999B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2018 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | May 2, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/80
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Automatic testing for control valves is provided for diagnosing of actuators, including actuators not equipped with analog or discrete position transmitters. A valve controller confirms steady-state conditions for a turbo-compressor system that includes a control valve in a first position and sends, to an actuator for the control valve, a signal to initiate a partial valve stroke to move the control valve away from the first position. The valve controller receives feedback signals from sensors in the turbo-compressor system and monitors the feedback signals for a change from the steady-state conditions. When the monitoring detects a change from the steady-state conditions within a defined time period, the valve controller sends, to the actuator, a signal to return the control valve to the first position. When the monitoring does not detect a change from the steady-state conditions within the defined time period, the valve controller generates an alarm signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.