Pump-protecting valve

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

Patent

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Details

F04D 15/00 (2006.01) F16K 27/02 (2006.01)

Patent

CA 2170747

The invention concerns a pump-protecting valve (1) having a valve housing (2), a pump connecting sleeve (4), arranged in a main passage direction (3), and a feed-water connecting connecting sleeve (5) opposite the pump connecting sleeve. A non-return valve disc (10), which is possibly spring-loaded, is mounted so that it is axially displaceable between the pump connecting sleeve and the feed-water connecting sleeve. The non- return valve disc (10) actuates an at least single-stage throttle valve (11) which is coaxial thereto, so that this throttle valve (11) is fully open when the non-return valve disc (10) is closed and produces a bypass from the pump connection side to a bypass connection (12) disposed laterally of the main passage direction (3). The valve housing (2) has an assembly plate closure (20) opposite the bypass connection (12). The non-return valve disc (10) and the throttle valve (11) are removably mounted coaxially to the assembly plate closure (20).

L'invention concerne une soupape de protection de pompe (1) pourvue d'un corps de soupape (2), avec un tube de raccord de pompe (4), disposé dans un sens de passage principal (3), et un tube de raccord d'eau d'alimentation (5), opposé au tube de raccord de pompe. Un disque de clapet antiretour (10), éventuellement sollicité par un ressort, est monté mobile dans le sens axial entre le tube de raccord de pompe et le tube de raccord d'eau d'alimentation. Le disque de clapet antiretour (10) actionne une soupape d'étranglement (11) à au moins un étage, dans le même axe que le disque, de sorte que cette soupape d'étranglement soit complètement ouverte lorsque le disque de clapet antiretour (10) est fermé et de sorte qu'elle forme, du côté du raccord de pompe, une dérivation vers un raccord de dérivation (12) disposé latéralement par rapport au sens de passage principal (3). Le corps de soupape (2) présente une fermeture (20) de plaque de montage, opposée au raccord de dérivation (12). Le disque de clapet antiretour (10) et la soupape d'étranglement (11) sont montés amovibles, dans le même axe que la fermeture (20) de la plaque de montage.

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