ES301429A3 - Improvements in the control valves for mechanisms actuated by pressure liquids (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in the control valves for mechanisms operated by pressurized liquids, characterized in that they comprise: a valve body having a bore and a sliding element in the direction of the axis, said body having an entrance that can be connected to a source of the liquid under pressure, outlet and a prolonged direct channel joining the inlet and the outlet and cutting the drill transversely to the middle of its ends and said body having a pair of high pressure outlet orifices that join with the outlet channels that extend transversely in relationship with the bore and said direct channel and communicating with the bore in axially spaced zones in opposite directions from the union of the bore and the direct channel, said body having an exit channel provided with branches, which cut said bore in areas close to the junctions of the outlet channels with the bore and said body being characterized by the provision of a branched channel of high pressure joined with the entrance of the body and having a pair of branches, each extending longitudinally along one of said outlet channels and equally arranged transversely with the bore and the direct passage, each of said branches communicating with the bore in a spaced zone but adjacent to the junction of one of the high pressure outlet channels with the bore and said outlet channels being selectively communicable with their respective branches of the high pressure and branched branch channels after the element slip of the valve in opposite directions in its bore from a neutral position leaving the direct channel free to either of two operating positions by closing the direct channel and completely blocking the flow of liquid in the outlet portion of the direct channel to make the pressure of the liquid that enters the body increases in the branched channel and in that as long as the exit channel high pressure is connected to the branched high pressure channel, by the valve element; and said body being further characterized by the provision of a pair of more holes by transversely cutting one of the high pressure outlet channels and the adjacent branch of the high pressure branched channel, a piston in each of said slidable bores forward and back between a first position substantially releasing its outlet channel for the free circulation of liquid to its high pressure outlet and a second position limiting its outlet channel to effect the dosing of the liquid stream returned to the exhaust channel through its orifice. high pressure outlet, depending on the position of the valve element, the pressure of the liquid in said branched high-pressure channel that is obtained when the valve element is in one of said working positions, imposing a force on said pistons which tends to keep everyone in the said position first in which the liquid can run freely through its outlet channel and means for transferring the pressure of the return liquid obtaining in each high pressure outlet a force in the piston associated therewith, tending to displace said piston to the second position. (Machine-translation by Google Translate, not legally binding)