Working principle of pneumatic column drilling rig

Compressed air is used as the power to control the rotation and reversing of the rotary motor through the rotary motor reversing valve. Compressed air drives the gear motor to rotate. After two-stage reduction, it drives the main shaft to rotate and then drives the drilling tool to work. The support cylinder reversing valve controls the tightening and loosening of the cylinder. The feed motor reversing valve controls the forward and backward movement of the drilling rig.