G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 16/20 (2006.01)
Patent
CA 2681518
A pilot valve (2) for controlling operation of a hydraulically-actuated pressure reducing valve, the pilot valve including a housing (4), and a first valve member (15) mounted in the housing for longitudinal movement along an axis relative to the housing and to a second valve member (22) in response to the outlet pressure of the pressure reducing valve. The first valve member is provided with an aperture (20) and the second valve member comprises a closure portion which varies the effective flow cross section of the aperture in accordance with relative longitudinal movement between the first and second valve members. An adjuster (26) controls the relative rotational position of the first and second valve members, the closure portion having a profile such that relative rotation between the first and second valve members causes the closure portion to vary the effective flow cross section of the aperture (20).
L'invention concerne une soupape pilote (2) destinée à contrôler le fonctionnement d'un détendeur à commande hydraulique, la soupape pilote incluant un corps (4), et un premier élément de soupape (15) monté dans le corps destiné au mouvement longitudinal le long d'un axe par rapport au corps et à un second élément de soupape (22) en réponse à la pression de sortie du détendeur. Le premier élément de soupape est équipé d'une ouverture (20) et le second élément de soupape comprend une partie de fermeture qui fait varier la section transversale réelle d'écoulement de l'ouverture selon le mouvement longitudinal relatif entre les premier et second éléments de soupape. Un dispositif de réglage (26) contrôle la position de rotation relative des premier et second éléments de soupape, la partie de fermeture ayant un profil telle que la rotation relative entre les premier et second éléments de soupape amène la partie de fermeture à faire varier la section transversale réelle d'écoulement de l'ouverture (20).
Burrows Andrew Roland
Heron Roger
Freedman Gordon
I20 Water Limited
LandOfFree
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