F - Mech Eng,Light,Heat,Weapons – 28 – G
Patent
F - Mech Eng,Light,Heat,Weapons
28
G
F28G 1/16 (2006.01) F28G 3/16 (2006.01)
Patent
CA 2755567
A handheld lance (350) for high pressure jetting of tubes (22) of a heat exchanger core (12), comprises a fluid conduit (352) defining an internal plenum chamber having at least one nozzle (362) for emitting a jet of fluid for cleaning the outer surfaces of the tubes (22) of the core (12) and a coupling (356) for connecting the plenum chamber to a high pressure fluid supply line. In the invention, the or each conduit (352) has an outer diameter sufficiently small to fit between all the tubes (22) of the core (12) and at least one elongate stabiliser bar (364,366) is mounted on the coupling and positioned to one side of the or each conduit (352) with the axis of the bar lying in the same plane as the adjacent conduit (352), the bar (364,366) being sufficiently thin to fit between the tubes (22) of the heat exchanger core and sufficiently rigid to prevent lateral displacement of the adjacent conduit (352).
L'invention concerne une lance portative pour le nettoyage à haute pression des tubes d'un faisceau d'échangeur de chaleur. La lance 50 comporte une conduite à fluide définissant une chambre interne de répartition possédant au moins une buse 62 pour émettre un jet de fluide destiné à nettoyer les surfaces externes des tubes du faisceau et un couplage 56 pour connecter la chambre de répartition à une canalisation d'alimentation de fluide à haute pression. L'épaisseur de la lance 50 est suffisamment mince pour permettre à la conduite de passer entre les tubes du faisceau d'échangeur de chaleur et sa largeur est bien plus grande que son épaisseur pour augmenter la rigidité de la conduite dans le plan normal à son épaisseur.
Asquith Anthony
Tube Tech International Limited
LandOfFree
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