Control valve

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

Patent

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Details

F16K 11/07 (2006.01) F15B 11/05 (2006.01) F15B 13/04 (2006.01)

Patent

CA 2214227

The invention concerns a control valve (1) with a housing (2), having a pump connection (13), a tank connection device (9, 10), a working connection device (5, 6) and a load pressure connection device, each connected with an opening device (14, 11, 12, 7, 8, 15, 16) in a control surface, and with a slide (3), arranged movably in the housing (2) and co-operating with the control surface, by which the slide has grooves (17, 18) and/or channels (19, 22), in a way that it connects or separates predetermined opening devices with/from each other. In such a control valve the tightness must be improved. For this purpose an additional auxiliary tank connection device (31, 32) is provided, which is connected with an auxiliary tank opening device (27, 28) in the control surface. The slide (3) has an auxiliary tank pipe or groove (29, 30), which, in its neutral position, connects the auxiliary tank opening device (27, 28) with the load pressure opening device (15, 16).

Cette invention concerne un soupape (1) dont le corps (2) comporte un raccord à une pompe (13), un raccord à un réservoir (9, 10), un raccord côté organe commandé (5, 6) et un raccord côté détecteur de pression, chaque raccord étant en communication avec un organe d'ouverture (14, 11, 12, 7, 8, 15, 16) dans une surface de commande et relié à un tiroir (3) mobile dans le corps (2) du robinet et agissant de concert avec la surface de commande, ledit tiroir comportant des rainures (17, 18) et/ou des canaux (19, 22) disposés de façon qu'il solidarise les organes d'ouverture ou les sépare. Dans un tel robinet de commande, l'étanchéité doit être améliorée. € cette fin, il est prévu un deuxième raccord à un réservoir (31, 32) communiquant avec un organe d'ouverture secondaire (27, 28) sur réservoir dans la surface de commande. Le tiroir (3) comporte une rainure ou un canal secondaire (29, 30) qui, en position neutre, établit la communication entre l'organe d'ouverture secondaire sur réservoir (27, 28) et l'organe d'ouverture sur détecteur de pression (15, 16).

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