Fail-safe gas valve system with solid-state drive circuit

Details Fail-safe gas valve system with solid-state drive circuit Fail-safe gas valve system with solid-state drive circuit

F - Mech Eng,Light,Heat,Weapons

23

N

F23N 5/24 (2006.01) F23D 14/72 (2006.01) G05D 7/06 (2006.01) F23N 1/00 (2006.01)

Patent

CA 2240922

A solid-state fail safe gas valve system in which first and second gas valves are arranged in series in a gas passageway, the valves being actuatable by first and second solenoid operators respectively, the second operator requiring a voltage greater than the operating voltage supplied to the valve system to achieve actuation. The operators are separately energized through microprocessor controlled switches so that a capacitor connected across the second operator and its switch is pumped to a voltage above the supplied voltage by voltage induced by interrupted energization of the first operator.

Système de soupapes à gaz à sécurité intégrée, comportant une première et une deuxième soupapes montées en série sur une canalisation de gaz et commandées respectivement par un premier et un deuxième solénoïdes, le deuxième n'agissant que lorsqu'il est excité par une tension supérieure à la tension d'alimentation du système. Les deux dispositifs de commande sont alimentés séparément via des commutateurs commandés par microprocesseur, l'interruption de l'excitation du premier dispositif de commande provoquant une augmentation de la tension dans un condensateur monté aux bornes du deuxième dispositif et de son commutateur à une valeur supérieure à la tension d'alimentation du système.

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