Versatile emergency shutdown device controller

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 37/00 (2006.01) F16K 31/00 (2006.01) F16K 31/42 (2006.01) F17D 3/00 (2006.01) G05B 23/02 (2006.01) G05D 16/20 (2006.01)

Patent

CA 2637713

A multi-functional or versatile emergency shutdown valve controller may be used in various different emergency shutdown configurations to enable the testing of different types and configurations of emergency shutdown devices and the supporting equipment associated therewith. In one example, a digital valve controller for use with an emergency shutdown valve includes two pressure sensors and is adapted to be connected to a pneumatic valve actuator and to a solenoid valve device to assist in the on-line testing of the valve actuator as well as in the on-line testing of the solenoid valve. To perform testing of the solenoid valve, the valve controller may measure the pressure at different ports of the solenoid valve as the solenoid valve is actuated for a very short period of time. The valve controller may determine whether the solenoid device is fully functional or operational based on the derivative of the difference between the measured pressure signals, i.e., based on the rate of change of the difference between the measured pressure signals over time.

Contrôleur de valve de coupure d'urgence polyvalent ou versatile, utilisable dans différentes configurations de coupure d'urgence permettant de tester des types et configurations divers de dispositifs de coupure d'urgence et l'équipement de soutien associé. Selon un exemple, on décrit un contrôleur de valve numérique utilisable avec une valve de coupure d'urgence comprenant deux capteurs de pression, que l'on peut connecter à un actionneur de valve pneumatique et à un dispositif à électrovanne pour contribuer à l'essai en ligne de l'électrovanne. Pour conduire l'essai de cette électrovanne, le contrôleur de valve peut mesurer la pression à différents accès de l'électrovanne à mesure que celle-ci est actionnée pendant un très bref laps de temps. Le contrôleur peut déterminer si le dispositif à électrovanne est entièrement fonctionnel ou opérationnel sur la base de la dérivée de la différence entre les signaux de pression mesurés, c'est-à-dire sur la base du degré de modification de la différence entre les signaux de pression mesurés dans le temps.

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