Valves and valve actuation – With material guide or restrictor
Patent
1981-06-11
1983-09-06
Rosenthal, Arnold
Valves and valve actuation
With material guide or restrictor
251127, 181268, 181254, 138 41, 138 44, F16K 4708, F15D 104
Patent
active
044024851
ABSTRACT:
A device for attenuating noise of fluid in non-axisymmetric turbulent flow which comprises a conduit and a plurality of parallel aligned nested tubes in said conduit. The nested tubes are of varying cross-sectional size and have approximately the same cross-sectional shape. The tubes are eccentrically aligned with respect to each other such that a lower surface of each tube is in closely spaced relationship or is in substantially line contact with a surface of an adjacent tube along their longitudinal lengths, the line contact between all of the tubes being substantially at a common line, allowing for the thickness of the tube walls. A brace extends through and interconnects the nested tubes. In one embodiment, the noise attenuating device is spaced closely downstream from a reverse flow ball valve to provide a smooth transition from the non-axisymmetric flow discharging from the valve to substantially axisymmetric flow (or fully developed pipe flow) in the conduit downstream of the valve. The front of the tubes may be configured to lie in a plan generally transverse to the conduit. In another embodiment, the front of the tubes are configured to lie in a generated surface that is complementary to the exterior of the reverse flow ball valve.
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patent: 4180100 (1979-12-01), Kolb
Fisher Controls Company, Inc.
Rosenthal Arnold
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