Powder valve

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 1/12 (2006.01) B65D 83/06 (2006.01) B65D 90/58 (2006.01) B65D 90/62 (2006.01)

Patent

CA 2642307

The present invention concerns a valve (1), a valve closing body (14) and use of a valve (1) and a valve closing body (14) of the type used for injecting dry powder which is mixed with liquid, and where the dry powder is supplied under the liquid surface in a mixing vessel (11) in which a vacuum is typically maintained. The novel feature of a powder valve (1) according to the invention is that a closing body (14) of the valve in the closed position extends through the valve seat (13) of the valve and into the wet environment. It is hereby achieved that when the valve (1) is opened, powder or dust from powder is not deposited on the valve closing body (14). This is in spite of the valve closing body (14) being wet, due to contact with the liquid to which the powder is added. Due to its elongated shape, the valve closing body (14), which in the withdrawn position opens for inflow of powder, has the property that the inflowing powder dries the valve closing body (14) at first and keeps it dry subsequently.

La présente invention concerne une valve (1), un corps d'obturation de valve (14) et l'utilisation d'une valve (1) et d'un corps d'obturation de valve (14) du type utilisé pour injecter de la poudre sèche qui est mélangée avec un liquide, la poudre sèche étant fournie sous la surface de liquide dans un récipient de mélange (11) dans lequel une dépression est typiquement maintenue. La caractéristique de nouveauté d'une valve à poudre (1) selon l'invention c'est qu'un corps d'obturation (14) de la valve dans la position fermée s'étend à travers le siège de valve (13) de la valve et dans le milieu humide. Cela permet d'empêcher le dépôt de poudre ou de poussière provenant de la poudre sur le corps d'obturation (14) de la valve lorsque la valve est ouverte. Et cela en dépit de l'état humide du corps d'obturation (14) de la valve dû au contact avec le liquide auquel la poudre est ajoutée. Grâce à sa forme allongée, le corps d'obturation de la valve (14), qui est dans la position en retrait s'ouvre pour l'admission de la poudre, présente la caractéristique d'assurer d'abord le séchage du corps d'obturation de la valve (14) par l'écoulement de la poudre qui ensuite la maintient à l'état sec.

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