Liquid flow control valve

F - Mech Eng,Light,Heat,Weapons – 17 – D

Patent

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Details

F17D 5/06 (2006.01) G01M 3/28 (2006.01)

Patent

CA 2331457

A liquid flow control valve has a valve body (10) in which is mounted a valve member (41) moveable between valve open and closed positions. A turbine (15) senses liquid flow through the valve body (10) and generates electrical pulses which are counted by a control circuit, over a pre-set period. An electro-magnet (54, 55) controls operation of the valve member (41) and is driven by the control circuit so as to close the valve in the event that flow continues for longer than the pre-set period or the flow is greater than at a pre-set rate. The valve may also be closed should the temperature fall to about 0°C.

Une vanne de commande destinée à un écoulement de liquide comprend un corps (10) de vanne dans lequel est monté un élément (41) de vanne qui peut se déplacer entre des positions d'ouverture et de fermeture de la vanne. Une turbine (15) détecte l'écoulement du liquide traversant le corps (10) de vanne et génère des impulsions électriques qui sont comptées par un circuit de contrôle pendant une période prédéterminée. Un électro-aimant (54, 55) commande le fonctionnement de l'élément (41) de vanne et se trouve entraîné par le circuit de contrôle de manière à fermer la vanne si l'écoulement venait à se poursuivre pendant une période supérieure à la période prédéterminée ou si l'écoulement venait à dépasser un débit prédéfini. La vanne peut également être fermée si la température baisse jusqu'à environ 0 DEG C.

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