Pressure control valve for down -hole drill

The utility model discloses a pressure control valve for down -hole drill, oil pocket including forming between valve body, left valve gap and the right valve gap is equipped with main valve core andpush rod in, be equipped with control port on the left valve gap, be equipped with the spout on the valve gap of the right side, the last recess that is equipped with of main valve core is equipped with nested case between main valve core and the right valve gap, is equipped with the regulation pole on the right valve gap, has the control oil pocket between main valve core and the right valve gap,is equipped with compression spring between recess and the nested case, is equipped with reset spring between spout and the nested case, be equipped with import of control oil and the export of control oil on the control oil pocket, be equipped with the intercommunicating pore on the nested case, and be equipped with oil discharging port on the valve gap, be equipped with the damping adjustment structure between control o