HANDLING FACILITY MOVED OVER OUTER SURFACES OF PIPELINES Russian patent published in 1994 - IPC

FIELD: industrial handling facilities. SUBSTANCE: handling facility has two snap rings arranged in tandem and provided with loose rollers; on their inner surfaces rings have radially installed telescopic members whose stiff rods hold rings on pipeline surface during facility movement. Snap rings are joined together by means of flexible air-operated linear-displacement propellers each of which is placed in guides of casing covering pipeline and can change its linear dimensions in axial direction depending on amount of air applied to it; in the process it follows configuration of line turns. EFFECT: improved reliability of handling facility movement over pipes of various outer diameters and various spatial positioning. 2 cl, 9 dwg