Rock drill silencing apparatus

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 1/30 (2006.01)

Patent

CA 2455685

The invention is concerned with a rock drill silencing apparatus that includes a tubular housing (10) in which a pneumatic rock drill (12) can reciprocate. The housing has an open mouth (50) at its forward end through which a drill rod (58) attached to the rock drill can project. There is a seal (52) about the open mouth and a thrusting arrangement to press the housing towards a rock face (68) to be drilled such that the seal seals against that face. An air motor (36) and feed screw arrangement drives the rock drill in a forward direction in the housing during drilling. Air and flushing water conduits are arranged to deliver compressed air and water from external sources to the rock drill and air motor and there is an exhaust for conveying the rock drill exhaust, drillings and flushing water out of the housing.

La présente invention concerne un appareil destiné à atténuer le bruit d'une perforatrice de roche, qui comprend une enveloppe (10) tubulaire dans laquelle une perforatrice de roche (12) pneumatique peut développer un mouvement de va et vient. Cette enveloppe possède une bouche (15) ouverte au niveau de son extrémité avant à travers laquelle une tige de forage (58) fixée à la perforatrice peut se projeter. Il existe un joint (52) autour de cette bouche ouverte et un agencement poussant destiné à presser l'enveloppe contre la face (68) d'une roche à forer de sorte que ce joint se scelle contre cette face. Un moteur pneumatique (36) et un agencement de vis d'avancement entraîne la perforatrice vers l'avant dans l'enveloppe pendant le forage. Des conduites d'air et d'eau de purge sont agencées de façon à apporter de l'air comprimé et de l'eau en provenance de sources extérieures à destination de la perforatrice et du moteur pneumatique et une évacuation permet de transporter les évacuations de la perforation, les éléments de forage et l'eau de purge hors de l'enveloppe.

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