Method and device for verifying the workability of a safety...

G - Physics – 05 – B

Patent

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G05B 23/02 (2006.01) F16K 37/00 (2006.01) G05B 9/02 (2006.01)

Patent

CA 2306141

The invention relates to the maintenance of safety devices. Valves and similar automatic mechanical safety devices normally maintaining a fixed position are in danger of getting stuck, and consequently may not be fully operable in an emergency situation. In a system according to the invention, real-time data indicating the operability of, for example, a valve actuator, is provided. When a fault is discovered, it can be localized using online diagnostic tools. A standby state is continuously maintained, as the unit for activating the safety function is independent of the unit for monitoring the operability, and the latter is bypassed in an emergency situation.

Cette invention se rapporte au domaine de l'entretien des dispositifs de sécurité et, plus précisément, à celui des soupapes ou autres dispositifs de sécurité similaires, automatiques et mécaniques. Ces dispositifs, qui servent normalement à maintenir une position fixe, courent le risque de se bloquer et, partant, de ne pas fonctionner pleinement en cas de situation d'urgence. Cette invention concerne un système dans lequel des données en temps réel indiquent les capacités de fonctionnement d'un dispositif d'actionnement de soupape, par exemple. Lorsque l'on découvre une défaillance, celle-ci peut être localisée à l'aide d'outils diagnostiques en ligne directe. Un état de veille est maintenu en permanence, tandis que l'unité d'activation de la fonction de sécurité est indépendante de l'unité de contrôle de la capacité de fonctionnement, cette dernière étant contournée en cas de situation d'urgence.

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