Apparatus for everting a tube and method of using same

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 63/36 (2006.01) B29C 67/00 (2006.01) F16L 55/165 (2006.01) F16L 55/18 (2006.01)

Patent

CA 2070375

In a tube eversion apparatus a first chamber in which the eversion pressure is developed is controllably sealed by a sphincter-type valve, said valve being in turn actuated by pressure developed in a preferably separately controllable and adjustable second chamber, another chamber preferably being provided above the sphincter-type valve for containing a supply of liquid and limiting turbulence from any escape of fluid past the sphincter-type valve, said other chamber also providing means for supplying heated fluid to a lay-flat hose adapted to be pulled through the sphincter-type valve by the tube being everted. Use of the improved apparatus involves appropriate modifications of the usual eversion process involving applying and controlling the everting pressure and the pressure exerted against the sphincter-type valve by the fluid in the second chamber.

Dans un appareil d'inversion de tube, on commande la fermeture hermétique d'une première chambre (52), dans laquelle on crée une pression d'inversion, par une soupape de type à diaphragme, laquelle est à son tour actionnée par une pression créée de préférence dans une seconde chambre (54) à commande et réglage distincts. Une autre chambre (14) est de préférence aménagée au-dessus de la soupape de type à diaphragme pour contenir le liquide d'alimentation et limiter toute turbulence due à une fuite de fluide en provenance de la soupape de type à diaphragme, ladite chambre comprenant également un dispositif d'alimentation du fluide chauffé pour le tuyau (92) à poser à plat conçu pour être tiré à travers la soupape de type à diaphragme par le tube à inverser. L'utilisation de cet appareil amélioré implique des modifications appropriées du procédé d'inversion habituel, consistant à appliquer et commander la pression d'inversion, ainsi que la pression exercée contre la soupape de type à diaphragme par le biais du fluide se trouvant dans la seconde chambre.

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