Diaphragm valve

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

Patent

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Details

F16K 7/14 (2006.01) F16K 41/12 (2006.01)

Patent

CA 2166843

A diaphragm valve comprises: a body (1) having an inflow passage (1a), an outflow passage (1b), a concave valve chamber (1c) and a valve seat (1d); a metallic main diaphragm (2) which holds airtightness of the valve chamber (1c) and makes contact with and separates from the valve set (1d) directly or indirectly; a bonnet (4) which securely holds an outer circumferential edge portion of the main diaphragm (2) between the body 1 and the bonnet 4; and a stem 5 which causes the main diaphragm (2) to be deformed elastically. At the top surface side of the aforementioned main diaphragm (2) there is arranged a metallic sub-diaphragm (3) whose outer circumferential edge portion can be elastically deformed in a vertical direction. A center portion of the aforementioned sub- diaphragm (3) is fixed to a center portion of the main diaphragm (2), so that the sub-diaphragm (3) comes in contact with the top surface side of the main diaphragm (2) to support a bend thereof when the main diaphragm is deformed elastically.

Cette invention concerne un robinet à membrane composé d'un corps (1) ayant un passage d'admission (1a), un passage de sortie (1b), un logement d'obturateur concave (1c) et un siège d'obturateur (1d); d'une membrane métallique principale (2) qui assure l'étanchéité du logement d'obturateur (1c) et qui obture/libère l'ouverture du siège d'obturateur (1d) directement ou indirectement; d'un chapeau (4) qui, assemblé au corps (1) du robinet, maintient la membrane principale (2) solidement en place par son pourtour; et d'un tige 5 qui commande la déformation élastique de la membrane principale (2). Au-dessus de cette membrane (2) est disposée une membrane métallique secondaire (3) dont le pourtour extérieur peut être déformé élastiquement vers le haut ou le bas. Cette membrane secondaire (3) est fixée par sa partie centrale à la partie correspondante de la membrane principale (2) de façon qu'elle entre en contact avec la face supérieure de celle-ci pour la retenir quand elle est déformée élastiquement.

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