ANNULAR CUTTING DEVICE FOR REPAIRING EXISTING PIPELINE, AND METHOD FOR REPAIRING EXISTING PIPELINE

摘要

PROBLEM TO BE SOLVED: To efficiently repair an existing pipe by efficiently and positively recovering crushed pieces of the existing pipe in an annular cutting device for repairing an existing pipeline.;SOLUTION: This annular cutting device for repairing the existing pipeline is provided with a rotary cutting part 30 circumferentially arranged at the front part of a device body 22 jacked in the existing pipeline, and circumferentially rotated to cut the existing pipe 10; a cylindrical recovery part 40 arranged at the device body 22 in front of the rotary cutting part 30, formed in cylindrical shape as a whole and having a recovery port 43 for recovering the crushed pieces of the existing pipe cut by the rotary cutting part 30; a plurality of blade pieces arranged extending radially from the center side inside the cylindrical recovery part 40 and circumferentially rotated to transfer the crushed pieces; and a discharge pipe 74 arranged at the device body 22 in front of the cylindrical recovery part 40 and communicating with the front face of the cylindrical recovery part 40 to discharge the crushed pieces.;COPYRIGHT: (C)2005,JPO&NCIPI