Arrangement and a method for monitoring an air flow in a drill rig
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United States of America Patent
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Aug 26, 2014
Grant Date -
Mar 10, 2011
app pub date -
Apr 29, 2009
filing date -
May 13, 2008
priority date (Note) -
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Abstract
An arrangement in a rock drill rig 10 has an inlet valve 31 arranged upstream from a displacement compressor 32 that is used for supplying an air flow 34 to at least one flushing hole 23 in the surface of a drill bit 20. The rock drill rig 10 also has an air regulator 35 arranged to regulate the system pressure in the air flow path 34 downstream from the compressor and a detector for detecting air flow through the at least one flushing hole 23 in the surface of the drill bit. The detector has a pressure sensor 36, arranged between the air regulator 35 and the inlet valve 31, for measuring the reduced system pressure.
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