METHOD FOR DRAWING OF PARALLEL CYLINDRICAL PIPELINES INTO NO-GO TUNNEL WITH CROSS SECTION OF CIRCULAR OUTLINE Russian patent published in 2013 - IPC F16L7/00 

FIELD: machine building.

SUBSTANCE: pipelines are arranged in coaxial holes-lodgments of supporting members connected to each other with ropes. A formed bank of pipelines is drawn into a tunnel. Traction force is applied to the first supporting member in the movement direction. The first and the last supporting members are located at the distance equal to the tunnel length. Number of intermediate supporting members is one less than the tunnel length divided by maximum allowable length of the bay between annular supporting members. Supporting member is made in the form of a hollow cylinder equipped with rolling elements and end walls. Outer diameter and width of the supporting member are 0.8-0.9 and 0.4-0.5 of diameter of the no-go tunnel respectively. Centres of coaxial holes-lodgments, the diameter of which is 1.05-1.1 of the diameter of routed pipelines, are arranged in a circumferential direction.

EFFECT: simultaneous routing of several parallel pipelines; reduction of losses of traction forces, protection of pipelines against mechanical damages during routing and operation, possibility of replacing individual pipelines or their full bank.

3 dwg