FIELD: mining.
SUBSTANCE: system for manipulating the drill rods comprises a clamping unit that is rotatable and axially movable in x, y and z directions during rod transportation. The clamping unit comprises: rod grips for engaging and holding a first rod to be moved to the drilling rig; a conveyer for moving the clamping unit from the position of rod collection to the position for connecting rods on the drilling rig, so that in said rod connection position the first rod is axially aligned with the drill string; a centering tool mounted on clamping unit by means of an elongated connector. The centering tool includes a pair of centering jaws. At least one of the jaws is movable to allow the jaws to open and close around the first rod. A portion of said jaws in closed state forms a connecting section and guide neck projecting radially outward from one end of connecting section portion for guiding the axial centering of the connecting section relative to a second rod forming the end of the drill string in order to ensure centered connection of the first and second rods within the connecting section. The clamping unit comprises a support frame mounted on the conveyor and a carriage moved axially relative to the support frame.
EFFECT: reliable and fast movement of the rods, providing accurate axial centering when connecting the rods.
15 cl, 10 dwg
