초록 ▼

Fluid flow apparatus, such as a fluid flow meter, a fluid mixing device or a fluid dispersing device, includes a fluid displacement member (40) mounted in a conduit (20) and having a sloped exterior wall (48) forming a periphery on the member for deflecting the fluid to flow through a region of prog

Fluid flow apparatus, such as a fluid flow meter, a fluid mixing device or a fluid dispersing device, includes a fluid displacement member (40) mounted in a conduit (20) and having a sloped exterior wall (48) forming a periphery on the member for deflecting the fluid to flow through a region of progressively decreasing area defined between the periphery of the member and the interior surface of the conduit. The displacement member is a hollow frustum (42) terminating at the plane of its outer peripheral edge (46) and accommodating flow measurements at or adjacent the axis of the conduit at or adjacent the plane of the peripheral edge of the displacement member.

대표청구항 ▼

The invention claimed is: 1. A fluid flow meter having a conduit defining a longitudinal axis for conveying fluid therethrough in a given direction, a tube extending through the wall of the conduit and having a tubular guide positioned substantially along the axis of the conduit in the downstream d

The invention claimed is: 1. A fluid flow meter having a conduit defining a longitudinal axis for conveying fluid therethrough in a given direction, a tube extending through the wall of the conduit and having a tubular guide positioned substantially along the axis of the conduit in the downstream direction, and a fluid flow displacement member in the conduit having, in relation to the direction of fluid flow, an upstream end and an downstream end, the displacement member being mounted at its upstream end substantially coaxially on said tubular guide and having between the ends thereof a sloped wall forming a periphery of the displacement member for deflecting the fluid to flow through a region defined between the periphery of the displacement member and an interior surface of the conduit, characterized in that the displacement member comprises a hollow frustum having an exterior wall and an interior wall, the exterior wall slopes outwardly in the downstream direction from adjacent to the axis of the conduit to a downstream peripheral edge spaced from an interior surface of the conduit such that the fluid flows between the peripheral edge and the interior surface of the conduit, the interior wall slopes outwardly in the downstream direction from adjacent to the axis of the conduit to said peripheral edge, and a port in communication with the tube located at or adjacent to the axis of the conduit and at or adjacent to a plane of said peripheral edge that is substantially normal to the axis. 2. The fluid flow meter as set forth in claim 1 wherein the tube comprises a measurement tap at the exterior of the conduit and said port accommodates measurement via the tap of fluid flow within the conduit at or adjacent to the axis of the conduit and at or adjacent to the plane of said peripheral edge. 3. The fluid flow meter as set forth in claim 1 wherein said port comprises a hollow stem extending substantially along the axis of the interior wall of said hollow frustum and having an upstream end in communication with the tube and a downstream end opening at or adjacent to the plane of said peripheral edge. 4. The fluid flow meter as set forth in claim 3 wherein said stem is mounted on said hollow frustum at the upstream end of said interior wall. 5. The fluid flow meter as set forth in claim 3 wherein the downstream end of said hollow stem terminates adjacent to and upstream from the plane of said peripheral edge. 6. The fluid flow meter as set forth in claim 4 wherein the downstream end of said hollow stem terminates adjacent to and downstream from the plane of said peripheral edge. 7. The fluid flow meter as set forth in claim 3 wherein the downstream end of said hollow stem terminates substantially at the plane of said peripheral edge. 8. The fluid flow meter as set forth in claim 1 wherein said port is located adjacent to and upstream from the plane of said peripheral edge. 9. A fluid flow meter comprising: a conduit for conveying fluid therethrough in a given direction, said conduit having a peripheral wall with an interior surface; a fluid flow displacement member in said conduit having, in relation to the direction of fluid flow, an upstream end and a downstream end, said displacement member being of smaller size than said conduit and having a sloped wall forming a periphery on said displacement member for deflecting the fluid to flow through a region defined by the periphery of said displacement member and the interior surface of said conduit; a flow measurement tap extending through the wall of said conduit and communicating with an area within the conduit upstream of the displacement member, and a tube extending through the wall of said conduit and including a tubular guide facing in the downstream direction along the axis of said conduit, said displacement member having a substantially axial passage coupled to said tubular guide, said tube and said axial passage comprising a measurement tap communicating between an area external of the conduit and an area within the conduit located at or adjacent to the axis of the conduit and at or adjacent to the downstream end of said displacement member, said displacement member comprising a hollow frustum sloping outwardly from its upstream end to its downstream end and terminating in a peripheral edge spaced inwardly from the interior surface of the conduit and defining a plane substantially normal to the axis of the conduit, said hollow frustum having an exterior wall and an interior wall, said exterior wall and said interior wall each sloping outwardly in the downstream direction from the axis of said displacement member to the plane of said peripheral edge, said passage extending substantially along the axis of said interior wall and terminating at or adjacent to the plane of said peripheral edge. 10. The fluid flow meter as set forth in claim 9 wherein said passage terminates adjacent to and upstream of the plane of said peripheral edge. 11. The fluid flow meter as set forth in claim 9 wherein said passage terminates adjacent to and downstream from the plane of said peripheral edge. 12. The fluid flow meter as set forth in claim 9 wherein said passage terminates substantially at the plane of said peripheral edge. 13. The fluid flow meter as set forth in claim 9 wherein said passage comprises a hollow stem secured to said hollow frustum and extending substantially along the axis of said interior wall, said stem having an upstream end coupled to said tube and a downstream end terminating at or adjacent to the plane of said peripheral edge. 14. The fluid flow meter as set forth in claim 13 wherein said hollow stem terminates adjacent to and upstream of the plane of said peripheral edge. 15. The fluid flow meter as set forth in claim 13 wherein said hollow stem terminates adjacent to and downstream of the plane of said peripheral edge. 16. The fluid flow meter as set forth in claim 13 wherein said hollow stem terminates substantially at the plane of said peripheral edge. 17. The fluid flow meter as set forth in claim 13 wherein said hollow stem is removeably and replaceably secured to said displacement member. 18. The fluid flow meter as set forth in claim 9 wherein said displacement member is removeably and replaceably mounted in said conduit. 19. A fluid flow meter comprising: a conduit for conveying fluid therethrough in a given direction, said conduit having a peripheral wall with an interior surface and defining a longitudinal axis; a fluid flow displacement member in said conduit having, in relation to the direction of fluid flow, an upstream end and a downstream end, said displacement member being of smaller size than said conduit and having a sloped wall forming a periphery on said displacement member for deflecting the fluid to flow through a region defined by the periphery of said displacement member and the interior surface of said conduit; a flow measurement tap extending through the wall of said conduit and communicating with an area within the conduit upstream of the displacement member, and a tube extending through the wall of said conduit, a portion of said tube facing in the downstream direction along the axis of said conduit, said displacement member having a substantially axial passage coupled to said tube, said tube and said axial passage comprising a measurement tap communicating between an area external of the conduit and an area within the conduit located at or adjacent to the axis of the conduit and at or adjacent to the downstream end of said displacement member, said displacement member comprising a frustum sloping outwardly from its upstream end to its downstream end and terminating in a peripheral edge spaced from the interior surface of the conduit, said displacement member defining a plane substantially normal to the axis of the conduit at said peripheral edge, said passage extending substantially along the axis of said conduit and terminating at or adjacent to the plane at said peripheral edge. 20. The fluid flow meter as set forth in claim 19 wherein the downstream end of said passage terminates adjacent to and upstream from the plane at said peripheral edge. 21. A fluid flow meter comprising: a conduit for conveying fluid therethrough in a given direction, said conduit having a peripheral wall with an interior surface and defining a longitudinal axis; a fluid flow displacement member in said conduit having, in relation to the direction of fluid flow, an upstream end and a downstream end; a first flow measurement tap extending through the wall of said conduit and communicating with an area within the conduit upstream of the displacement member, and a second flow measurement tap extending through the wall of said conduit and into said displacement member, said second flow measurement tap and said displacement member defining a passageway communicating between an area external of the conduit and an area within the conduit located at or adjacent to the axis of the conduit and at or adjacent to the downstream end of said displacement member, said displacement member comprising a frustum sloping outwardly from its upstream end to its downstream end and terminating in a peripheral edge spaced from the interior surface of the conduit, said displacement member defining a plane substantially normal to the axis of the conduit at said peripheral edge. 22. The fluid flow meter as set forth in claim 21 wherein the downstream end of said passageway terminates adjacent to and upstream from the plane of said peripheral edge.