An apparatus and a method for lining an underground pipe

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 55/18 (2006.01) B29C 63/36 (2006.01) F16L 55/165 (2006.01) F16L 58/02 (2006.01)

Patent

CA 2200261

An apparatus and a method for lining an underground pipe are proposed: the pipe is plugged at a location upstream to a manhole; a three-pronged passage is installed whose first end penetrates the plug and opens in the interior of the pipe upstream to the plug and whose second end opens in the manhole at the level of the pipe, and whose third end opens in the atmosphere at a substantially high level; then the second end of the three-pronged passage is closed to cause the drain water to rise and go toward the third end of the three-pronged passage; the drain water is let to fall from the down-looking third end of the three-pronged passage into an upper end of a vertical eversion conduit provided in the manhole, thereby effecting eversion of a tubular liner into the vertical eversion conduit means; the tubular liner everting in the vertical eversion conduit is guided by a guide device such that at the lower end of the vertical eversion conduit the eversion head of the tubular liner is caused to turn orthogonally into the downstream direction; and the tubular liner is constricted at a location downstream to the repair portion of the pipe so that the tubular liner is inflated.

Cette invention concerne une méthode et un appareil de garnissage intérieur d'une canalisation. Il s'agit d'obturer la canalisation en amont d'un regard de visite et d'installer un accessoire de canalisation à trois branches, la première traversant l'obturateur de la canalisation pour pénétrer dans celle-ci, la deuxième donnant dans le regard de visite et la troisième ouvrant sur l'atmosphère à un niveau sensiblement élevé. Dans un deuxième temps, on bloque la deuxième branche de l'accessoire de canalisation pour forcer l'eau s'écoulant en aval de l'obturateur à remonter dans la troisième branche à bout recourbé vers le bas. L'eau d'évacuation retombe alors par le bout recourbé de l'accessoire de canalisation à trois branches dans un tube vertical d'éversion prévu dans le regard de visite, y forçant l'éversion d'une garniture tubulaire. L'extrémité éversée de la garniture tubulaire est guidée par un dispositif approprié de manière à changer de direction à angle droit vers le tronçon aval de la canalisation. En dernier lieu, la garniture tubulaire est étranglée en aval de la région réparée pour la faire gonfler.

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