초록 ▼

The present invention relates to a flap valve device and a regulation assembly comprising such devices. A pivoting flap valve device has a flap body substantially in the form of a disc mounted on a support and control axle, for the regulation of the circulation of a fluid, particularly a liquid, bet

The present invention relates to a flap valve device and a regulation assembly comprising such devices. A pivoting flap valve device has a flap body substantially in the form of a disc mounted on a support and control axle, for the regulation of the circulation of a fluid, particularly a liquid, between an upstream conduit portion and a downstream conduit portion. The flap body (2) is mounted centered on the axle (3), in that the two conduit portions (4 and 5) are axially offset relative to each other and in that the internal surfaces (7, 7') of the opposed offsets resulting from the axial offset or non-alignment of the portions (4 and 5) constitute bearing surfaces (7, 7') for two complementary seat portions (6, 6') for the flap body (2), located on opposite sides of the axle (3) carrying the flap body (2).

대표청구항 ▼

1. A pivoting flap valve device comprising an upstream conduit portion, a downstream conduit portion, a disc-shaped flap body for regulating circulation of a fluid between said upstream conduit portion and said downstream conduit portion, said disc-shaped flap body being mounted centered on a contro

1. A pivoting flap valve device comprising an upstream conduit portion, a downstream conduit portion, a disc-shaped flap body for regulating circulation of a fluid between said upstream conduit portion and said downstream conduit portion, said disc-shaped flap body being mounted centered on a control and support axle, said upstream and downstream conduit portions having respective offset axes so as to form two seat portions for said flap body, said seat portions being located on opposite sides of said axle and being symmetrical relative to said axle, said seat portions having a shape of at least a portion of a crescent when seen in respective axial directions, said upstream conduit portion and said downstream conduit portion being connected by an intermediate passage portion having an axial length, said seat portions being inclined relative to said axes of said upstream conduit portion and downstream conduit portion and forming at least respective portions of an internal surface of said passage portion, said flap body having beveled edges with opposed slopes on opposite sides of said control and support axle, said beveled edges being adapted to come into shape-mating sealing contact with said seat portions. 2. The flap valve device of claim 1, wherein said seat portions have an inclination relative to said axes of said upstream conduit portion and downstream conduit portion which decreases from a maximum angle in a plane containing said axes of said upstream conduit portion and downstream conduit portion towards said control and support axle, said beveled edges of said flap body having a correspondingly variable inclination so as to come into shape-mating contact with said seat portions in a closed position of said valve device. 3. The flap valve device according to claim 1, wherein the surfaces of the beveled edges that come into bearing against the seat portions are coated with a sealing layer. 4. The flap valve device according to claim 1, further comprising, at least in said passage portion, bearings of the support and control axle, protruding into said passage portion, delimiting laterally the cross-section of the passage by two parallel chords perpendicular to the axle and accordingly reducing the area of the seat portions, sealing flanks in the form of half-discs being formed on the flap body and coming into sealing contact with said bearings. 5. The flap valve device according to claim 1, wherein the passage portion is in the form of an intermediate element in which is premounted the support and control axle with the flap body, said intermediate element being provided with interfaces for sealed connection with portions of the upstream conduit portion and downstream conduit portion. 6. The flap valve device according to claim 5, wherein the intermediate element is prolonged, from the upstream or downstream side, by a ferrule for connection to a respective conduit portion. 7. The flap valve device according to claim 1, wherein said axes of said upstream and downstream conduit portions are parallel and spaced apart. 8. The flap valve device of claim 7, wherein said seat portions meet said upstream and downstream conduit portions in obtuse angles in the plane that contains the axes of said upstream and downstream conduit portions.