Longitudinally reinforced cured in place liner

Details Longitudinally reinforced cured in place liner Longitudinally reinforced cured in place liner

B - Operations, Transporting

29

C

B29C 63/06 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2545025

A longitudinally reinforced resin impregnated cured in place liner (21) with a reinforcing scrim (33) to limit longitudinal stretch is provided. A continuous length of resin impregnable tube is provided in lay flat condition and impregnated and a scrim (33) having greater strength in the warp direction than in the weft direction is placed on a portion of the bottom of the tube that is then feed into a tubular former where an impermeable film (31) is formed into a tube sealed and continuously everted about the inner tubular member and scrim travelling in an opposite direction so that the everted wrapping envelopes the tubular member. The reinforced tube may have an integral inner impermeable layer that is installed in an existing pipeline by the pull-in-and inflate method.

L'invention concerne une gaine (21) durcie sur place, imprégnée de résine et renforcée longitudinalement, cette gaine étant pourvue d'un renfort tissé (33) permettant de limiter l'étirement longitudinal. Une longueur continue d'un tube pouvant être imprégnée de résine est appliquée à plat et imprégnée. Un renfort tissé (33) plus résistant dans la direction chaîne que dans la direction trame est placé sur une partie de la base du tube qui est alors cédé à une forme tubulaire où un film imperméable (31) est façonné en un tube scellé et replié en continu autour de l'élément tubulaire interne et du renfort tissé se déplaçant dans une direction opposée de telle manière que l'emballage replié enveloppe l'élément tubulaire. Le tube renforcé peut avoir une couche imperméable interne d'une seule pièce qui est installée dans une canalisation existante par le procédé d'insertion et de gonflabe.

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