Removal of residual concrete from ready mixed concrete drums

Details Removal of residual concrete from ready mixed concrete drums Removal of residual concrete from ready mixed concrete drums

B - Operations, Transporting

08

B

B08B 9/093 (2006.01) B05B 3/14 (2006.01) B08B 13/00 (2006.01) B28C 5/42 (2006.01)

Patent

CA 2567719

Residual concrete in the drum of a ready mixed concrete truck is removed by high-pressure water. A nozzle is mounted on the leading end of a torpedo- shaped nozzle housing that is hingedly mounted to an elongate boom. The boom enters the mouth of the drum at an angle that matches the angle of the drum. The hinge allows the nozzle housing to pivot with respect to the elongate boom so that the nozzle is close to the residual concrete. The boom is retracted toward the mouth with the drum rotating in the mix direction and the nozzle oscillating so that it cuts through a swath of concrete. As the boom retracts, the torpedo-shaped nozzle housing maintains the nozzle close to the residual concrete on the drum and both sides of the helical fins. The nozzle sweeps an arc from about eighty to one hundred twenty degrees as it oscillates.

Les résidus de béton dans la cuve d'un camion malaxeur de béton prêt à l'emploi sont enlevés au moyen d'eau à haute pression. Une buse est montée sur l'extrémité avant d'un logement de buse en forme de torpille qui est monté par charnière sur une flèche allongée. La flèche entre dans le bec de la cuve selon un angle qui concorde avec celui de la cuve. La charnière permet au logement de buse de pivoter par rapport à la flèche allongée de sorte que la buse s'approche des résidus de béton. On rétracte la flèche vers le bec lorsque le tambour tourne dans la direction de mélange et la buse oscille de sorte qu'elle coupe une bande de béton. Pendant que la flèche se rétracte, le logement de buse en forme de torpille maintient la buse près des résidus de béton sur la cuve et des deux côtés des ailettes hélicoïdales. La buse dessine un arc d'environ 80 à 120 degrés lorsqu'elle oscille.

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