DEVICE FOR TRENCHLESS REPLACEMENT OF UNDERGROUND PIPELINES Russian patent published in 2024 - IPC F16L1/28 

FIELD: construction.

SUBSTANCE: invention relates to construction industry and can be used for trenchless replacement of pipelines during repair and reconstruction of underground utilities. Device for trenchless replacement of underground pipelines comprises a pipe-breaking tool with a disk knife installed in a fork, a support roller, a cam with the possibility of fixed rotation, a reamer to increase the diameter of the well and a traction element. Support roller is installed in the additional fork opposite the disk knife. Cam is arranged between support roller and disk knife and is installed on shaft, which is located along axis of symmetry of pipe destructing working element. On the outer surface of the cam there are projections. Segmented slots are made on the ends of the cam and between the projections. In the fork and in the additional fork there are at least two rectangular slots, which are conjugated with the cam projections. Ends of fork and additional fork are made semicircular and are conjugated with segment slots of cam. In pipe breaking working element there is a mechanical pair of worm-worm wheel. Worm wheel is mounted on shaft and coupled with possibility of cam rotation.

EFFECT: possibility of simultaneous destruction of old and pulling through of new pipelines of different diameters with higher reliability.

1 cl, 4 dwg