DEVICE FOR TRENCHLESS REPLACEMENT OF PIPELINES Russian patent published in 2010 - IPC F16L1/28 

FIELD: construction.

SUBSTANCE: device is proposed for trenchless replacement of pipelines, comprising pipe-breaking working element with a support roller and disk knife, expander for increase of well diametre and traction element. In pipe-breaking working element arranged as cylindrical, opposite to support roller there is an additional support roller installed, and an additional disk knife is installed opposite to disk knife, besides support rollers are installed in front of disk knives. Support rollers and disk knives are arranged on axles in forks arranged with the possibility of fixed radial displacement in guides arranged in the form of pipes and pressed in two through holes, which are provided in pipe-breaking working element at its axis of symmetry at the distance from each other, which exceeds diametre of these holes, besides axles of holes and axis of pipe-breaking working element are mutually perpendicular. Ends of guides protrude by the same distance beyond border of outer surface of pipe-breaking working element, and there is a slot arranged in each of them, and at least two slots are arranged in each fork.

EFFECT: invention will make it possible to destroy old pipelines of various diametres.

3 dwg