E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 1/26 (2006.01) B25D 9/26 (2006.01)
Patent
CA 2677827
A method for controlling a fluid operated percussive device, which inside an axially extending cylinder room (3) of a housing (2) of the percussive device includes a to and fro moveable percussive piston (1), which is adapted for performing strikes in a striking direction (A) and which includes a signal portion (4) for controlling a main valve (5), which is adapted to intermittently transmit pressure fluid to at least one driving chamber (7) for the percussive piston. An auxiliary valve (9) is controlled for transmitting fluid contact between at least one auxiliary channel means (13,14) with a channel opening in the cylinder room (3), and the main valve (5) over the signal portion (4), for switching the main valve (5) before the percussive piston, in operation, has reached at least one of said regions. The invention also concerns a percussive device and a rock drilling machine.
L'invention concerne un procédé pour commander un dispositif à percussion actionné par un fluide, qui, à l'intérieur d'une chambre de cylindre s'étendant axialement (3) d'un boîtier (2) du dispositif à percussion, comprend un piston à percussion mobile en va-et-vient (1), qui est apte à effectuer des frappes dans une direction de frappe (A) et qui comprend une partie de signal (4) pour commander une soupape principale (5), qui est apte à transmettre de façon intermittente un fluide de pression à au moins une chambre d'entraînement (7) pour le piston à percussion. Une soupape auxiliaire (9) est commandée pour transmettre un contact de fluide entre au moins un moyen de canal auxiliaire (13, 14) avec un canal débouchant dans la chambre de cylindre (3), et la soupape principale (5) sur la partie de signal (4), pour commuter la soupape principale (5) avant que le piston à percussion, en fonctionnement, n'atteigne au moins l'une desdites régions. L'invention concerne également un dispositif à percussion et une machine de forage de roches.
Atlas Copco Rock Drills Ab
Fetherstonhaugh & Co.
LandOfFree
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