Arrangement for controlling rock drilling

Details Arrangement for controlling rock drilling Arrangement for controlling rock drilling

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) E21B 44/06 (2006.01)

Patent

CA 2338760

The invention concerns an arrangement for controlling a hydraulic rock drilling device. The adaptation includes a pressure ratio valve (18; 18') that is used for adjusting the relation between the pressures in the pressure channel leading to the percussion device and/or other actuator, such as a shank stabilizer (28), and the pressure channel leading to the feed mechanism. The pressure ratio valve (18; 18') is arranged to keep the relation between the pressures of the actuator and the feed mechanism constant over the normal drilling range.

L'invention porte sur un agencement pour la commande d'un dispositif hydraulique de forage de roche. Cet agencement comprend une soupape de rapport de pressions (18; 18') qui est utilisée pour ajuster la relation entre les pressions du canal menant au dispositif de percussion et/ou autre actionneur tel qu'un stabilisateur (28) de train de forage, et du canal menant au mécanisme d'alimentation. La soupape (18; 18') du rapport de pressions est agencée de sorte que la relation entre les pressions de l'actionneur et du mécanisme d'alimentation reste contante dans le rapport de forage normal.

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