DEVICE FOR TRENCHLESS REPLACEMENT OF PIPELINES Russian patent published in 2008 - IPC F16L1/28 

FIELD: construction, pipeline.

SUBSTANCE: invention is related to construction of pipeline transport and may be used in trenchless replacement of underground pipelines in repair and reconstruction of engineering utilities. Working element is connected by means of stretching wire to traction element, and pulled through polymer pipeline is equipped with facility for creation of additional static force, which contains casing made of elastic friction material and installed in the pulled through pipeline, and core installed in it with windings wound on it and connected to power supply source. On the side surface of core at the same distance in relation to each other at least two permanent magnets are installed. Facility for creation of additional static force is connected to working element with the help of wire. Whenever magnetic fields of permanent magnets and windings interact, during supply of electric current to them, elastic casing is pressed to internal surface of pulled through pipeline and transfers additional force of pulling to it.

EFFECT: higher reliability of polymer pipeline pulling through and possibility to increase its length.

3 dwg