Arrangement for employing drill steel centralizer travelling on feed beam of rock drill machine
AssigneeSandvik Mining and Construction Oy
InventorJuha Piipponen
Life of this patent
Estimating the term…
Abstract
The invention relates to an arrangement for employing a drill steel centralizer (6) travelling on a feed beam (1) of a rock drill machine (2). The drill steel centralizer (6) has a pressure fluid-operated actuator for closing a transfer opening intended for a drill rod (4) during drilling, whereby pressure fluid is fed into the actuator during drilling.
Claims11
Arrangement for employing a drill steel centralizer travelling on a feed beam of a rock drill machine, the arrangement comprising a feed cylinder (7) for moving the drill machine (2) in the drilling direction and back, at least one turning wheel (8) mounted stationary in relation to the feed cylinder (7) and a flexible feed member (9) running around it and connected both to the drill machine (2) and the feed beam (1), a drill steel centralizer (6) mounted to travel on the feed beam and stationary in relation to the feed cylinder (7) in the longitudinal direction of the feed beam (1) and having a central opening (6a) for a drill rod (4), a transfer opening (6b) at the side of the central opening for transferring the drill rod to the central opening (6a) and away from it and means for closing the transfer opening (6b) during drilling, and pressure fluid channels (14;
- 16;
- 17;
- 18) for feeding pressure fluid in to and out of the pressure fluid chambers (7c, 7d) of the feed cylinder (7), characterised in that the centralizer (6) has a pressure fluid-operated actuator (11) for closing the transfer opening (6b), that a pressure fluid channel (20) is connected from the feed cylinder (7) chamber, to which pressure fluid is fed during drilling to move the drill machine (2) into the drilling direction, to the actuator (11) of the centralizer (6) in such a manner that the pressure of the pressure fluid makes the actuator (11) close the transfer opening (6b).
An arrangement as claimed in any one of the preceding claims, characterised in that a separate closing member (6c) is connected to the actuator (11) for closing the transfer opening (6b).
An arrangement as claimed in any one of the preceding claims, characterised in that the actuator (11) is a pressure medium cylinder.
An arrangement as claimed in any one of the preceding claims, characterised in that the closing member (6c) is mounted turnable in relation to the centralizer (6).
An arrangement as claimed in any one of the preceding claims, characterised in that between the closing member (6c) and centralizer (6), a spring (12) is connected to act on the closing member in such a manner that it tries to move the closing member (6c) away from the transfer opening (6b).
Dependencies are inferred from the claim text.