Multiple orifice assembly
AssigneeCombustion Engineering, Inc.
InventorWalter Kuehn, Jr.
Life of this patent
Estimating the term…
Abstract
A multiple orifice assembly for increasing the flow resistance in a conduit for conducting fluid flow. The multiple orifice assembly comprises a plurality of orifices spacedly supported in the conduit and a diffuser which is supported intermediate adjacent orifices. The diffuser is spaced from the upstream orifice a distance less than that distance required for fluid issuing from the upstream orifice to fully expand back to the constraints of the conduit.
Claims4
In combination, a conduit for conducting fluid flow, a multiple orifice assembly for increasing the flow resistance in the conduit comprising, two orifice plates spacedly supported in the conduit, one orifice plate being upstream in a fluid flow sense to the other orifice plate, each orifice plate having a single, centrally located opening therethrough;
- and a diffuser plate positioned intermediate the two orifice plates, said diffuser plate having a solid, impermeable, central portion, said diffuser plate further having at least two openings therethrough, said diffuser plate being spaced from the upstream orifice plate a distance less than that distance required for fluid issuing from said upstream orifice plate to fully expand back to the constraints of the conduit.
In a forced circulation steam generating unit having a plurality of steam generating tubes, a common header connected to said multplicity of steam generating tubes for delivering a supply of water to said tubes, a steam and water separating drum operatively connected to the discharge end of said multiplicity of steam generating tubes, and a pump connected to said steam and water separating drum and said common header for receiving water from said steam and water separating drum and delivering it to said common header, an improved multiple orifice assembly for the entrance of each of said multiplicity of steam generating tubes, each of said multiple orifice assemblies comprising two orifice plates spacedly supported in each of said steam generating tubes, each orifice plate having a single centrally located opening therethrough, one orifice plate being upsteam in a fluid flow sense to the other orifice plate, and a diffuser plate supported intermediate the orifice plates, said diffuser plate having a solid, impermeable, central portion, said diffuser plate further having at least two openings therethrough, said diffuser plate being spaced from the upstream orifice plate a distance less than that distance required for fluid issuing from said upstream orifice plate to fully expand back to the constraints of the tube.
Dependencies are inferred from the claim text.