Rotary percussion device for a drill column

Details Rotary percussion device for a drill column Rotary percussion device for a drill column

B - Operations, Transporting

25

D

B25D 9/06 (2006.01) B25D 16/00 (2006.01) B25D 17/24 (2006.01) E21B 6/04 (2006.01) E21B 17/03 (2006.01)

Patent

CA 2410400

The inventive rotary percussion device (1) used for driving at least one drill column (2) disposes of a percussion device (6) and a rotary device (5) and of an insertion end (3), which is rotatably mounted in a device body (8) and which has an axial boring, in which a percussion piston (4) is displaceably mounted. The insertion end (3), which is connected to the drill column (2) by means of a connection piece (33), is driven by the rotary device (5), and the percussion piston (4) mounted in the insertion end (3) is driven independently thereof by the percussion device (6). The percussion energy transmitted to the drill column (2) via the percussion piston (4) has, as a result, largely reduced influences upon the insertion end (3) that, according to the invention, is decoupled from the percussion device (5) so that premature material fatigue is prevented. In addition, the noise emissions occurring during the operation of the inventive rotary percussion device (1) are largely reduced.

L'invention concerne un dispositif roto-percutant (1) servant à entraîner au moins un train de tiges (2), qui comprend un dispositif de percussion et un dispositif de rotation (5,6), ainsi qu'une extrémité d'emboîtement (3) montée rotative dans un corps du dispositif (8), qui présente un alésage s'étendant dans le sens axial, dans lequel un piston frappeur (4) est monté coulissant. L'extrémité d'emboîtement (3) reliée par une pièce d'assemblage (33) au train de tiges (2) est entraînée par le dispositif de rotation (5) et le piston frappeur (4) monté dans ladite extrémité d'emboîtement (3) est entraîné indépendamment de cela par le dispositif de percussion (6). L'énergie de percussion transmise au train de tiges (2) par l'intermédiaire du piston frappeur (4) a de ce fait des répercussions fortement réduites sur l'extrémité d'emboîtement (3) désaccouplée, selon l'invention, du dispositif de percussion (5), de sorte à éviter tout phénomène de fatigue prématurée des matériaux. De plus, les émissions sonores intervenant pendant le fonctionnement du dispositif roto-percutant (1) sont fortement réduites.

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