Automatically switching valve for the rapid reduction of a back pressure in a hydraulic line

摘要

The invention relates to a multiway valve for returning fluid from a cylinder for moving the shield and conveyor, in mining, in a hydraulic system with a main control unit and a tank. The object on which the invention is based is to guarantee rapid relief of the piston side within a hydraulic system. This object is achieved using a multiway valve of a particular generic type by virtue of the fact that a spring (47) which acts on the switching disc (30) and by the pressure of which the switching disc (30) is displaceable towards the flow openings (33) of the rigid disc (31) is arranged on the valve element (21). IMAGE