A valve arrangement

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

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F16K 1/20 (2006.01) F04B 9/115 (2006.01) F04B 9/135 (2006.01) F04B 43/06 (2006.01) F04B 43/073 (2006.01) F16K 11/044 (2006.01) F16K 11/052 (2006.01) F16K 31/56 (2006.01)

Patent

CA 2308349

A valve arrangement comprising a valve housing (10) which includes an inlet port (11) and two outlet ports (12, 13) for fluid flowing through the valve housing, a valve element (15) that is freely moveable between two end positions and has two surfaces (16) which are adapted to close a respective outlet port in one and the other end position of the valve element, wherein said valve arrangement further includes means (20, 22; 21, 22; 21, 26, 47; 26, 48; 26, 50; 26, 51-54) for resetting the valve element between said end positions. The valve arrangement is co-ordinated with a double-acting pump that includes two spaces or rooms that have valve-controlled inlets and outlets (39, 40; 29, 30) for drive fluid and for pump-transported working fluid respectively. The spaces or rooms are divided into an operating chamber (28) and a working chamber (27) by means of respective partition walls (26, 36, 37) which have the form of pistons or diaphragms (26) and which are reciprocatingly moveable between end positions. The partition walls are interconnected by a movement transmission means (38) and perform under the influence of said drive fluid alternate working strokes in which working fluid is pressed out of one of said working chambers and drawn into the other of said chambers, and vice versa. The operating chamber inlets (39) are each connected to a respective outlet port (12 or 13) of the valve arrangement, and the pump includes resetting means which at the end positions of the partition walls cause the valve element (15) located in one end position to be moved over only a part of its movement path to its opposite end position.

L'invention concerne un agencement de soupape comprenant un carter (10) de soupape pourvu d'un orifice (11) d'entrée et de deux orifices (12, 13) de sortie permettant l'écoulement de fluide à travers ledit carter, un élément (15) de soupape, mobile librement entre deux positions terminales, présentant deux surfaces (16) conçues pour fermer chacune un orifice de sortie dans l'une et l'autre positions terminales dudit élément de soupape. L'agencement de soupape comprend, en outre, un dispositif (20, 22; 21, 22; 21, 26, 47; 26, 48; 26, 50; 26, 51-54) destiné à repositionner l'élément de soupape entre les deux positions terminales. L'élément (15) de soupape fonctionne en coordination avec une pompe à double effet comprenant deux espaces ou chambres pourvus d'entrées et de sorties (39, 40; 29, 30), contrôlés par valve, destinés respectivement à un fluide de commande et à un fluide de travail transporté par pompe. Les espaces ou chambres sont divisés en une chambre de fonctionnement (28) et une chambre de travail (27) au moyen de parois (26, 36, 37) de séparation respectives ayant la forme de pistons ou de membranes (26), et qui sont toutes deux mobiles entre les positions terminales. Les parois de séparation sont interconnectées par un dispositif (38) de transmission du mouvement et exécutent, sous l'effet du fluide de commande, des courses de travail alternées durant lesquelles le fluide de travail est expulsé de l'une des chambres de travail pour être aspiré dans l'autre chambre, et vice-versa. Les entrées (39) de la chambre de fonctionnement sont chacune connectées à un orifice (12 et 13) de sortie de l'agencement de soupape, et la pompe comprend un dispositif de repositionnement qui, au niveau des positions terminales des parois de séparation, provoque le déplacement de l'élément (15) de soupape se trouvant dans une position terminale, sur une partie seulement de sa trajectoire de mouvement jusqu'à sa position terminale opposée.

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