E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/24 (2006.01)
Patent
CA 2748173
The invention relates to a method for manipulating drill rods, to a centralizer and to a rock drilling unit. It is possible to introduce rods (9, 18) into the centre (K) of a rock drilling unit (4) or a bolting device by means of a changing device (13), and to remove from the centre. The rod locating in the centre is supported by a centralizer (16), through the central opening (20) of which the rod is arranged. The centralizer comprises a closing element (22) which is opened and closed in accordance with the operation of the changing device. The turning of the changing device affects a push rod (25) which releases the shape-locking of the closing element and transfers it to the open position. When the changing device is turned back to the normal position, a force member (26) returns the push rod to the normal position and simultaneously the closing element is shape-locked again. In the closed position the closing element is rigidly shape locked.
Cette invention concerne un procédé de manipulation de tiges de forage, un centreur et une unité de forage de roches. Des tiges (9, 18) peuvent être introduites dans le centre (K) d'une unité de forage de roches (4) ou d'un dispositif de boulonnage au moyen d'un dispositif de changement, et retirées dudit centre. La tige située au centre est supportée par un centreur (16) dont elle traverse l'ouverture centrale (20). Le centreur comprend un élément de fermeture (22) qui est ouvert et fermé selon le fonctionnement du dispositif de changement. Le pivotement du dispositif de changement affecte une tige de poussée (25) qui dégage le blocage de forme de l'élément de fermeture et le fait passer en position ouverte. Quand le dispositif de changement est remis dans la position normale, un élément de force (26) renvoie la tige de poussée dans la position normale et l'élément de fermeture est simultanément remis en état de blocage de forme. Dans la position fermée, l'élément de fermeture est immobilisé par blocage de forme.
Merilaeinen Mikko
Piipponen Juha
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Sandvik Mining And Construction Oy
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