Arrangement and a method for monitoring an air flow in a drill rig
US8813870B2 · kind B2 · utility
1Cited by
11References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 29, 2009 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Aug 5, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.