| 摘要 |
PURPOSE: A complex hammer capable of controlling the amount of discharged air is provided to perform smooth boring without the waste of much water by minimizing the discharge of sludge including rock and by adjusting the discharge amount. CONSTITUTION: A complex hammer capable of controlling the amount of discharged air is provided to discharge the air discharged after operating a piston of an air hammer to the inside of a complex hammer case by discharging the air to an air discharging hole bored in an air hammer wear sleeve. A part of the discharged air is discharged to the air through an air discharging path of a drill rod or is discharged to the ground through a sludge discharging path (20). A check valve assembly unit (30) is installed at an end of the sludge discharging path of the case so that the backflow into the case is prevented. [Reference numerals] (30) Air lifting flow rate (Check V/V); (AA) Compressor; (BB) Air distributor; (CC) Air discharge; (DD) Air discharging path of a drill rod; (EE) Discharge rock pieces+water+air |
