Method for restricting leakage of hydraulic oil in a rock...

F - Mech Eng,Light,Heat,Weapons – 15 – B

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F15B 20/00 (2006.01) E21B 15/00 (2006.01) E21C 35/04 (2006.01) G01M 3/32 (2006.01)

Patent

CA 2459964

Method for restricting leakage of hydraulic oil in a rock drilling rig (I). The oil level in the tank (3) is read and stored in a memory each time one switches between drilling and positioning of different components on the drill rig (I). After that the oil level is read at even intervals between the changes of operational mode. The last five read values are used for calculation of a level change velocity of the level in tank (3). The supply of hydraulic oil from pump (2) to drill rig (I) is stopped if the level in the tank has dropped a predetermined value, separately adjustable for each operational mode, or if the level change velocity exceeds a predetermined value, separately adjustable for each operational mode.

Procédé pour réduire les fuites d'huile hydraulique dans un appareil de forage de roche (1). Ce procédé consiste à relever le niveau d'huile du réservoir (3) et à le mettre en mémoire chaque que l'on passe du forage au positionnement des différents composants se trouvant sur l'appareil de forage (1), puis relever le niveau d'huile à intervalles réguliers entre les changements de mode de fonctionnement ; utiliser ensuite les cinq dernières valeurs relevées pour calculer la vitesse à laquelle le niveau du réservoir (3) change, et stopper l'alimentation de l'huile hydraulique de la pompe (2) à l'appareil de forage (1) si le niveau du réservoir a baissé d'une valeur prédéterminée, avec réglage distinct pour chaque mode de fonctionnement, ou si la vitesse de changement de niveau dépasse une valeur prédéterminée, avec réglage distinct pour chaque mode de fonctionnement.

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