Pipe back-dragging reaming mechanism

Abstract

The utility model relates to pipeline laying technical field, specifically disclose a pipeline back -drawing reaming mechanism, including reamer and auxiliary cone, reamer and auxiliary cone are connected through the positioning member, the reamer conical outer wall is connected four groups arc -shaped paddle, arc -shaped paddle one side is equipped with the spray head of installation on reamer, the conical outer wall of auxiliary cone is connected with the broken piece of end and arc -shaped paddle butt joint, broken piece far from arc -shaped paddle one end is equipped with the auxiliary broken piece of installation on auxiliary cone, the utility model discloses reamer is the front end conical structure, in reaming, through conical outer wall extrusion, cutting soil or rock, arc -shaped paddle installs in reamer outer wall, with reamer rotation, through arc -shaped surface will the soil or broken stone after breaking to the outside side and push, expand the diameter of the hole, the spray head sprays high -pressure water flow to the reaming area, wet soil to reduce cutting resistance, while flushing broken after the debris, avoid the hole blockage, auxiliary broken piece broken broken stone or agglomerate soil in reaming.

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