Adjustable valve

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

Patent

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Details

F16K 17/06 (2006.01) F16K 17/04 (2006.01)

Patent

CA 2697362

Adjustable valve, comprising a valve housing and a spindle, provided with a rotary knob, which via a threaded connection is rotatably received in the valve housing, furthermore comprising a valve biased against a valve seat of the valve housing by means of a helical spring, the helical spring being coupled to an axle of the knob, so that by rotation of the knob the spring length can be set to control the closing force on the valve. The threaded connection is provided with varying pitch. The helical spring can have a non-linear spring characteristic, while the variation in the pitch of the screw thread is tuned to the spring characteristic, such that the closing force varies linearly with the rotation of the rotary knob.

L'invention porte sur une vanne réglable, comprenant un boîtier de vanne et une tige, comportant une molette rotative, qui, par l'intermédiaire d'un raccord fileté, est reçu en rotation dans le boîtier de vanne, comprenant de plus une vanne sollicitée à l'encontre d'un siège de vanne du boîtier de vanne à l'aide d'un ressort hélicoïdal, le ressort hélicoïdal étant couplé à un axe de la mollette, de telle sorte que, du fait de la rotation de la mollette, la longueur du ressort peut être réglée de façon à commander la force de fermeture sur la vanne. Le raccord fileté possède un pas variable. Le ressort hélicoïdal peut avoir une caractéristique de ressort non linéaire, tandis que la variation du pas du filetage de vis est réglée en fonction des caractéristiques du ressort, de telle sorte que la force de fermeture varie de façon linéaire avec la rotation de la mollette rotative.

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