Control valve for a percussion device, method for a percussion device and percussion device

摘要

The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device ( 1 ) for breaking rock includes an impact element ( 8 ) controlled by a control valve ( 2 ). The control valve includes a control element ( 5 ) arranged to control channels ( 7 b) leading to a working pressure surface ( 9 ) of the impact element ( 8 ). The control element, during a working cycle of the control valve, is arranged to open and close pressure channels at several connecting moments so that during one working cycle of the valve, several impact pulses are arranged to be produced.