Position detection for rotary control valves

Details Position detection for rotary control valves Position detection for rotary control valves

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 37/00 (2006.01)

Patent

CA 2362252

A rotary control valve (10) includes a flow control element (16) having a lower valve shaft (20) rotatably received in a non-magnetic body portion (28). A magnet (26) is coupled with the lower valve shaft (20) and rotatable therewith to produce an external magnetic field that varies in accordance with the angular position of the flow control element (16). A magnetic field detector (30) positioned in the external magnetic field, is operable to detect the external magnetic field and to produce position signals representative thereof, such being indicative of the angular position of the flow control element (16).

Une vanne de commande rotative (10) comporte un élément de régulation de flux (16) ayant un arbre inférieur (20) logé rotatif dans une partie de corps non magnétique(28). Un aimant (26) est couplé à l'arbre inférieur (20) de vanne et peut tourner avec ce dernier de manière à produire un champ magnétique externe qui est fonction de la position angulaire de l'élément de régulation du flux (16). Un détecteur de champ magnétique (30) est mis en oeuvre pour détecter le champ magnétique externe et pour produire des signaux de position représentatifs de ce champ. Ce détecteur fournit ainsi une indication de la position angulaire de l'élément de régulation du flux (16).

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