Drilling for blasting - uses cradle and washing nozzle together with carriage mounted drive and hydraulic hammer

摘要

Drilling for blasing using a cradle for inserting and withdrawing a string of drill pipes, a washing nozzle (8), a pressure drive (2) mounted on a slide (1), and a hydraulic hammer. The drive for the drill pipes operates with a reciprocating action, and the washing nozzle (8), the threading in and out of a hose (9) and the drive member (6) of the swinging drive (2) form a drive unit, which can swing on the slide of a carriage. The washing nozzle (8) in the drive unit swings about an axis (15) at right angles to the long axis of the drill pipe and has a socket (18) to receive the drill pipe end (19). USE/ADVANTAGE - The drive torque is transferred to the drill pipe without special profiling or additional clamps.