DEVICE FOR TRENCHLESS REPLACEMENT OF PIPELINES Russian patent published in 2009 - IPC F16L1/00 

FIELD: mechanics.

SUBSTANCE: working tool is coupled, via hauling rope, with hauling member mounted in intake pit. The appliance to redistribute static loads is arranged inside plastic pipeline being laid represents upper and lower thrusts, front and rear tie-rods. Upper and lower levers are arranged symmetrically on both side of the said tie-rods to turn in the plate of their lengthwise cross section, each coupled with the tie-rod by one end. The upper lever other end is jointed to the upper thrust inner surface, while that of the lower lever is jointed to the lower thrust inner surface. The front tie-rod is connected, via an intermediate cable, with the working tool, while the rear tie-rod is coupled, via the rear cable, with the hauling member installed in the intake pit. The holes for both dismantling cables are made on both sides of the front tie-rod. The thrusts are coated with anti-friction material.

EFFECT: reliable pipeline laying, elongated new plastic pipeline.

4 dwg