E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/90
E21B 21/00 (2006.01) B01D 50/00 (2006.01) B07B 7/06 (2006.01) E21B 21/07 (2006.01)
Patent
CA 1051866
ABSTRACT OF THE DISCLOSURE A dust collection system particularly useful in conjunc- tion with hard rock drilling where a relatively large quantity of water is encountered in the drilling operation. Wetted rock par- ticles and dust are collected, by air suction, in a hood about the drill rod and are carried through a venturi, assisted by induced air, into a first stage separator where the heavy cuttings are in- tercepted by a screen and discharged through a rubber valve. Light cuttings and a quantity of dust are intercepted by further screens and discharged through a rubber valve. Remaining dust is discharged from the first stage separator through a venturi assis- ted by induced air and delivered tangentially into the lower por- tion of a second stage separator. A large proportion of the dust is discharged through the bottom of the second stage separator into collector bags and the remainder of the dust is carried upwards through a series of screens where a further quantity of dust is intercepted to fall down to the bottom of the separator, assisted by streams of air directed across individual screens and a conduit having openings at each screen level for collecting material picked up by the streams of air and by the conduit to the lower portion of the second stage separator. The small quantity of dust passing through the screens passes upwards through a venturi and is dis- charged, assisted by induced air, as a light plume. Air under pressure is directed against the screens in both the first and second stage separators in order to clean the screens of dust.
262025
Tymocko Peter
Tymocko Peter
LandOfFree
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