METHOD AND DEVICE FOR THE CONSTRUCTION AND/OR THE RECONDITIONING OF PIPELINES AND CONDUITS

摘要

A method and a device for the construction and/or the reconditioning of pipelines and conduits, by applying or forming around a sheath of impervious flexible material, a tubular member made from fabric or glass fibers or any other suitable material impregnated with a hardening resin. The impregnated tubular member is expanded and shaped by means of at least one expander formed by a tubular ring of resilient flexible material, of cylindrical shape, which has been pressurized so as to cause a fluid-tight squashing of its axial bore. By exerting a hydraulic or pneumatic pressure against one end of said expander, the latter is advanced along said tube with a rotary-translatory motion.