Advancing device for boring sections of roadway, tunnels or...

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 9/08 (2006.01) E21B 10/12 (2006.01) E21D 9/10 (2006.01)

Patent

CA 2362280

The invention relates to an advancing device for boring sections of roadway, tunnels or similar, with a working head (100) comprising first rotary cutters which are distributed over the surface that faces the working face (O), within the outer periphery of said working head and which are designed to loosen the solid material on the working face (O); and second rotary cutters (2) which protrude beyond the outer periphery to advance an overcut. According to a first embodiment of the device, the second rotary cutters (2) have a greater outer diameter than the first rotary cutters (1). According to a second embodiment, the fixing devices for the second rotary cutters comprise elements which allow said second rotary cutters to be mounted optionally in positions projecting radially to different distances beyond the outer periphery of the working head.

L'invention concerne un dispositif utilisé pour creuser des galeries, des tunnels ou des voies analogues, qui comporte une tête de travail (100) qui est pourvue, de premiers galets de coupe répartis sur son côté faisant face au front d'abattage (O), à l'intérieur de sa périphérie extérieure, qui servent à détacher le matériau superficiel du front d'abattage (O), ainsi que de seconds galets de coupe (2) qui font saillie sur sa périphérie extérieure et servent à creuser une surcoupe. Dans un premier mode de réalisation du dispositif, les seconds galets de coupe (2) ont un diamètre extérieur plus grand que celui des premiers galets de coupe (1). Dans un second mode de réalisation, les fixations des seconds galets de coupe comprennent des moyens avec lesquels on peut monter les seconds galets de coupe en choisissant parmi différentes distances de saillie radiale par rapport à la périphérie extérieure de la tête de travail.

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