Double diaphragm pump including spool valve air motor

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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Details

F04B 43/02 (2006.01) F04B 15/04 (2006.01) F04B 43/073 (2006.01) F04B 53/10 (2006.01)

Patent

CA 2439670

A double diaphragm pump including a pump housing, first and second pump diaphragms, an inlet manifold, an outlet manifold, and an air motor. The air motor includes a spool valve having a valve housing, an insert surrounded by the valve housing, and a spool. The valve housing and the insert cooperate to at least partially define a valve chamber, and the spool is slidably positioned within the valve chamber. The spool includes a seal engaging an inner surface of the insert and delimiting the valve chamber into valve subchambers. Movement of the spool within the valve chamber selectively communicates pressurized fluid to one of the diaphragms to move the associated diaphragm, thereby pumping fluid through the pump.

L'invention porte sur une pompe à double membrane, y compris un corps de pompe, une première et une deuxième membrane de pompe, un collecteur d'entrée, un collecteur de sortie et un moteur pneumatique. Le moteur pneumatique comprend un distributeur à tiroir avec logement de valve, un insert entouré par le logement de valve et une bobine. Le logement de valve et l'insert collaborent pour définir, au moins en partie une chambre de clapet dans laquelle la bobine peut coulisser. La bobine comprend un joint d'étanchéité qui s'engage dans une surface interne de l'insert et crée des chambres de clapet secondaires. Le déplacement de la bobine à l'intérieur de la chambre de clapet envoie sélectivement du fluide pressurisé à l'une des membranes pour faire bouger la membrane connexe, ce qui permet de pomper le fluide par le truchement de la pompe.

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