E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 44/06 (2006.01)
Patent
CA 2187630
Arrangement in a hydraulically operated rock drilling equipment comprising a feed motor (3), a percussion device (2), and a hydraulic pump (1) for feeding hydraulic fluid to the feed motor (3) and the percussion device (2). The arrangement comprises a pressure control valve (17) connected to be controlled on the basis of the control signal of the feed regulation valve (8) when starting the drilling so that when the value of the control signal is below a predetermined switching value, the pressure relief valve (18) is connected to the percussion pressure line (13) of the percussion device (2), and when the control signal exceeds the switching value, the pressure control valve (17) disconnects the pressure relief valve (18) from the percussion pressure line (13) and connects the pressure difference valve (20) in communication with the percussion pressure line (13).
Dispositif dans un équipement de perforation hydraulique pour roches comprenant un moteur d'entraînement (3), un dispositif de percussion (2), et une pompe hydraulique (1) alimentant en fluide hydraulique le moteur d'entraînement (3) et le dispositif de percussion (2). Ledit dispositif comporte une soupape de sûreté (17) connectée de sorte qu'elle soit régulée en fonction du signal de commande de la soupape de régulation d'alimentation (8) lorsque la perforation commence, et que, lorsque la valeur dudit signal de commande est inférieur à une valeur de commutation prédéterminée, la soupape de surpression (18) soit connectée à la ligne de pression de percussion (13) du dispositif de percussion (2). De plus, lorsque le signal de commande dépasse la valeur de commutation, la soupape de sûreté (17) déconnecte la soupape de surpression de la ligne de pression de percussion (13) et connecte la soupape de différence de pression (20) communiquant avec la ligne de pression de percussion (13).
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Tamrock Oy
LandOfFree
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