Hydraulic valve assembly having a cartridge insert valve exhibiting a closing element arranged in a pressure equalized manner

Abstract

The invention relates to a hydraulic valve assembly having a cartridge insert valve in a bore hole designed in a valve block and connected to the flow channels arranged in the valve block, comprising a valve sleeve inserted in the bore hole and a closing member guided into said sleeve, wherein the valve sleeve forms a valve seat for the closing member in the closing position thereof and the closing member can be moved by means of a connected hydraulic pre-control between the closed position thereof seated on the valve seat and separating the flow channels from one another, and an opened position pushed into the valve sleeve, and the bore hole is sealed tight by the cartridge insert valve inserted therein via a valve cover connected to the valve block. The closing member forms a sleeve-shaped closing element (17) exhibiting a through-hole (18) and thus ring surfaces on both ends thereof, the surfaces having identical area, and a pressure equalization chamber (19) corresponding with thethrough-hole (18) of the closing element (17) is formed in the valve cover (20) such that the closing element (17) is engaged on both sides with the pressure enacting in the adjustment direction of the element, which is seated completely pressure-equalized in the valve sleeve (14), wherein a radially protruding collar (21) having control surfaces (22, 23) opposite one another in the adjustment direction is arranged on the outer circumference of the closing element (17) for adjustment thereof. The control surfaces can be loaded by the control oil conducted via the hydraulic pre-control (25) for moving the closing element (17) in the valve sleeve (14), and the valve sleeve (14) inserted in the bore hole (11) of the valve block is fastened on the valve cover (20), the valve seat (16) formed on the valve sleeve (14) thereby maintaining an unaltered distance from the valve cover (20) during operation of the valve assembly.

Description

technical field [0001] The invention relates to a hydraulic valve arrangement with an assembly valve which is inserted into a bore formed in a valve block and connected to a flow channel arranged in the valve block , comprising a valve sleeve inserted (einsetzen) into the bore and a closing element (Schlieβglied) guided in the valve sleeve, wherein the valve sleeve forms a valve seat for the closing element in its closed position, and The closing element can be moved between a closed position in which it rests on the valve seat and separates the flow passages from one another and an open position displaced in the valve sleeve by means of a coupled hydraulic pilot, and the hole and the plug inserted therein The assembly valve is sealed (verschlieβen) by a valve cover cap connected to the valve block. Background technique [0002] Such a valve arrangement is available from Parker Hannifin GmbH & Co. KG in the catalog "Industrial Hydraulic Valves" of the TDA series, catalog pa...

AI Technical Summary

Problems solved by technology

[0003] The known valve arrangement has the disadvantage that, due to the unavoidable tolerances in the manufacture of the bore in the valve block, different positions of the valve sleeve or its valve seat relative to the cover cover can occur, since the valve sleeve is placed in the assembly valve During operation, the closing element is pushed against the step part under the action of the control oil pressure, and the step part has different positions limited by the tolerance

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