Two-stage servo gas pressure regulator module

G - Physics – 05 – D

Patent

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Details

G05D 16/20 (2006.01) G05D 16/06 (2006.01)

Patent

CA 2388379

A two-stage fluid pressure regulating valve (10) has a solenoid operated lever (50) for moving a regulator shaft (20) between two positions. The regulator shaft (20) biases the regulator spring (14) of a flow rate control diaphragm valve. When the solenoid (25) is actuated the lever is pivoted, applying increased force to the regulator spring, to change the valve set point to its higher pressure output. A return spring (58) returns the arm to the low pressure set point when the solenoid is de-energized. A pair of adjustable stops (53, 55) are positioned for engagement by the lever and forming limits for its motion, for independently adjusting the low and high pressure set points for the valve.

Selon l'invention, un vanne de régulation de pression de fluide à deux étages (10) possède un levier (50) actionné par solénoïde destiné à déplacer une tige de régulateur (20) entre deux positions. La tige de régulateur (20) sollicite le ressort du régulateur (14) d'une vanne à diaphragme de régulation de débit. Lorsque le solénoïde (25) est actionné, le levier pivote et applique une force plus grande au ressort du régulateur, de manière à déplacer la valeur de consigne de la vanne vers son débit haute pression. Lorsque le courant n'est plus appliqué au solénoïde, un ressort de renvoi (58) renvoie le bras vers la valeur de consigne basse pression. Deux butoirs réglables (53, 55) sont placés de manière à être engagés par le levier et à limiter le mouvement de ce dernier pour régler de façon indépendante les valeurs de consigne basse pression et haute pression, respectivement.

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