B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
B08B 7/00 (2006.01) B24C 1/00 (2006.01) B24C 5/04 (2006.01) B24C 7/00 (2006.01)
Patent
CA 2141943
A method and apparatus for effecting the continuous reliable supply of sodium bicarbonate particles to a blasting nozzle employing pressured air or water for conveying such particles into contact with a surface to be cleaned. A hopper having an inclined bottom surface terminating in a central aperture is provided for containing a mass of sodium bicarbonate particles. One of a plurality of different sized orifices are mounted in a central aperture in the bottom of the hopper and the discharge passage through such orifice is in transverse communication with a pair of pipes. One pipe is exposed to the atmosphere through an adjustable flow valve. The other pipe is connected by a hose to a venturi passage provided in the blast nozzle, thus creating a suction flow of air through the pipe to convey particles passing downwardly through the selected orifice to be injected into the pressured fluid passing through the applicating nozzle. The amount of air flow permitted through the pipe by the adjustable flow valve is coordinated with the aperture size of the particle feeding orifice, which in turn is a function of the size of the particles of sodium bicarbonate being utilized, to produce a volume flow of sodium bicarbonate particles which at no time occupies more than 25 percent of the cross-sectional area of the pipe and the hose connected to the applicating nozzle.
Un procédé et un appareil (1) permettent d'amener de façon continue et fiable des particules de bicarbonate de sodium vers une buse de sablage en utilisant de l'air ou de l'eau sous pression pour faire entrer ces particules en contact avec une surface à nettoyer. Une trémie (10) à fond incliné contient une masse de particules de bicarbonate de sodium. Des orifices de taille différentes sont disposés dans une ouverture centrale au fond de cette trémie et le passage de sortie par un de ces orifices est en communication transversale avec une paire de tuyau. Un tuyau (15) est exposé à la pression atmosphérique et l'autre (16) est raccordé par une conduite (17) à un passage à venturi intégré à la buse de sablage (20), ce qui crée dans ce tuyau un courant d'air aspirant chargé de transporter les particules qui passent vers le bas au travers de l'orifice choisi, de façon à les injecter dans le fluide sous pression traversant la buse de traitement.
Rubey Arthur C.
Spears William E. Jr.
Taylor Andrew M.
Church & Dwight Company Inc.
Smart & Biggar
Yelapa Corporation (the)
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