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1. WO2002035053 - ROCK DRILLING APPARATUS AND MECHANICAL CONVEYOR FOR DRILL CUTTINGS

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[ EN ]

CLAIMS
1. A rock drilling apparatus comprising a movable base, a feeding beam (6), a rock drill (7) arranged movably in the feeding beam for drilling holes, means for conveying drill cuttings broken off the rock during drilling by means of a flushing agent to the mouth of a drill hole, and a system for collecting drill cuttings that comprises a funnel (13) to be placed around the mouth of a drill hole, ducts for conveying the drill cuttings from the mouth of the drill hole, and at least one mechanical conveyor (20, 21) provided in connection with said ducts for conveying the drill cuttings to a predetermined dumping site, characterized in that the conveyor is provided with means for detecting when the conveyor has jammed and for forwarding the detection data to a control unit (70) of the conveyor, and that when the conveyor has jammed, the control unit of the conveyor is arranged, on the basis of said detection data, to drive the conveyor for a predetermined period of time in a direction that is opposite to the normal direction of conveyance.
2. A rock drilling apparatus according to claim 1, characterized in that the conveyor comprises a movement sensor (72) for monitoring the operation of the conveyor.
3. A rock drilling apparatus according to claim 1 or 2, charac-t e r i z e d in that the conveyor comprises a measuring sensor (76) for monitoring the operation of an actuator (75) that drives the conveyor.
4. A rock drilling apparatus according to any one of the preceding claims, characterized in that drill cuttings are arranged to be conveyed from the funnel (13) via one or more separators (15, 17) to the inlet end of the conveyor.
5. A rock drilling apparatus according to any one of the preceding claims, characterized in that the rock drilling apparatus is unmanned.
6. A mechanical conveyor for drill cuttings, which is to be placed in a rock drilling apparatus, the conveyor comprising a conveyor mechanism for conveying drill cuttings from the inlet end of the conveyor (20) to the discharge end thereof, an actuator (31, 75) that drives the conveyor, and a control unit (70) for controlling said actuator, characterized in that the conveyor is provided with at least one sensor (68, 72, 76) for detecting when the conveyor has jammed, and means for forwarding the detection data from the sensor to the control unit, and that after the conveyor has jammed, the control unit of the conveyor is arranged to drive the conveyor, on the basis of said detection data, for a predetermined period of time in a direction that is opposite to the normal direction of conveyance.
7. A conveyor according to claim 6, characterized in that the conveyor comprises a movement sensor (72) for monitoring the movement of the conveyor mechanism.
8. A conveyor according to claim 6 or 7, characterized in that the conveyor comprises a movement sensor for monitoring the movement of the actuator.
9. A conveyor according to any one of claims 6 to 8, charac-terized in that the conveyor comprises a measuring sensor for monitoring the input power of the actuator.
10. A conveyor according to any one of claims 6 to 9, character i z e d in that the conveyor mechanism comprises an outer pipe (27) and a conveyor screw (28) arranged rotatably therein.
11. A conveyor according to claim 10, characterized in that the conveyor screw (28) of the screw conveyor is formed of a spirally coiled band-like material (29), such that a longitudinal open space (30) is formed inside the conveyor screw, and that the conveyor screw is flexible at least in its longitudinal direction (E).