Media control valve

B - Operations – Transporting – 24 – C

Patent

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Details

B24C 7/00 (2006.01)

Patent

CA 2428378

The present invention is related to valves for the controlling the flows of media. For example, the valves of the present invention may control the flow of solid media into a fluid stream. More, specifically, the valves of the present invention may be used to control the flow of a blasting media into an air stream as part of a blasting apparatus for treatment of surface. In one embodiment, the media control valve of the present invention includes a valve body (20) having a media inlet (22) and a media outlet (24). A housing (40) ins connected to the valve body (20). A plunger (30) is positioned within the valve body and is connected to a piston (42) positioned within the housing. A base (60) is connected to the valve body such that is communicates with the media outlet. The media control valve of this embodiment may further include a sleeve (32) disposed between the valve body and the plunger. This sleeve may contain a media opening (34). In some embodiments of the media control valve of the present invention, the media opening has a first portion proximate to the media outlet and a second portion distal to the media outlet, the second portion being broader than the first portion. In other embodiments of the invention, the piston includes a contaminant isolation region (48).

La présente invention concerne des vannes permettant de commander l'écoulement de milieux. Par exemple, les vannes selon l'invention, peuvent commander l'écoulement de milieux solides pour former un courant fluide. Plus particulièrement, les vannes selon l'invention permettent de commander l'écoulement d'un milieu décapant pour former un courant d'air, dans un appareil de décapage, pour le traitement d'une surface. Selon un mode de réalisation, la vanne de commande de milieux comprend un corps de vanne (20) comportant une entrée (22) et une sortie (24). Un carter (40) est relié au corps de vanne (20). Un piston (30) est positionné à l'intérieur du corps de vanne et est raccordé à un piston (42) positionné dans le carter. Une base (60) est raccordée au corps de vanne de telle sorte qu'elle puisse communiquer avec la sortie du milieu. La vanne de commande selon ce mode de réalisation peut, en outre, comprendre un manchon (32) placé entre le corps de vanne et le piston. Ce manchon peut contenir une ouverture (34) pour le milieu. Selon certains modes de réalisation, l'ouverture comporte une première partie proche de la sortie et une deuxième partie distale de la sortie, la deuxième partie étant plus large que la première partie. Selon d'autres modes de réalisation, le piston comprend une zone d'isolement (48) de contaminants.

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