Drill rod changer, rock drilling unit and method of changing drill rods
AssigneeSandvik Mining and Construction Oy
InventorsJouni Koskinen, Antti Pajunen, Ilmo Pyorny, Risto Haataja, Timo Seppala
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a changing device, rock drilling unit and a method of changing drill rods in rock drilling. The changing device includes a first drill rod station for receiving a second drill rod and a second drill rod station for receiving a third drill rod. The second drill rod station may be moved to the first drill rod station and the first drill rod station may be moved to drilling axis by moving the whole changing device in a transverse direction relative to a feed beam.
Claims13
A changing device for handling drill rods in connection with a rock drilling unit having a longitudinal drilling axis and a first drill rod located on the longitudinal drilling axis, the changing device comprising:
- a body movably connected to the drilling unit;
- a first drill rod station for receiving one single changeable drill rod;
- a gripping device at the first drill rod station arranged for gripping and releasing the one single changeable drill rod located at the first drill rod station;
- at least one transfer device arranged to move the changing device in a transverse direction relative to a longitudinal axis of the drilling unit, the changeable drill rod being located initially at the first drill rod station and then moved by the changing device to the first drill rod at the drilling axis;
- and
- at least one second drill rod station configured to receive one single additional drill rod, the second drill rod station being selectively movable to the first drill rod station and away to a side position relative to the longitudinal drilling axis.
A rock drilling unit comprising:
- an elongate feed beam;
- a rock drilling machine arranged movably on the feed beam and defining a drilling axis, whereby the rock drilling machine includes a shank for connecting a first drill rod to the drilling axis;
- and
- at least one changing device including a body connected movably to the feed beam, a first drill rod station for receiving one single changeable drill rod, a gripping device at the first drill rod station and arranged to grip and release the changeable drill rod located at the first drill rod station, and at least one transfer device arranged to move the changing device in a transverse direction relative to the feed beam and for positioning the gripping device at a side position relative to the drilling axis, the changeable drill rod being located initially at the first drill rod station and then moved by the changing device to the first drill rod at the drilling axis, and at least one second drill rod station configured to receive one single additional drill rod, the second drill rod station being selectively movable to the first drill rod station and away to the side position relative to the longitudinal drilling axis, and wherein the changing device allows one single drill rod at a time to be stored at the second drill rod station.
A method of changing drill rods in a rock drilling unit, the rock drilling unit including a feed beam, a rock drilling machine and at least one retainer device, the method comprising:
- connecting at least two drill rods together at a drilling axis of the drilling machine for forming an extension rod assembly;
- dismantling the extension rod assembly after drilling;
- holding the extension rod assembly by the retainer device, wherein the connecting and dismantling includes moving the drill rods in a transverse direction relative to the feed beam between the drilling axis and at least one side position, the side position being parallel to the drilling axis and located at a distance from the drilling axis;
- moving the drill rods between the drilling axis and the side position by at least one changing device arranged to be transversally movable relative to the feed beam;
- providing the changing device with a first drill rod station and a second drill rod station, which are both capable of supporting one single drill rod at a time;
- moving the first drill rod station between a first storage position and the drilling axis by moving the changing device relative to the feed beam;
- moving the second drill rod station between a second storage position and the first storage position by moving the second drill rod station relative to the changing device;
- and
- moving the second drill rod station from the first storage position to the drilling axis by moving the changing device relative to the feed beam.
Dependencies are inferred from the claim text.