US3704726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppressing seat for a throttling valve
Assignee: Westinghouse Electric Corp
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Filing: 1971-02-02
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Granted: 1972-12-05
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Expires: 1991-02-02
Abstract
Abstract A noise suppressing throttling plug valve having a seat ring with a plurality of right-angled ducts extending therethrough, upstream of a valve seat. As the plug rises, an increasing number of ducts are uncovered providing an increase in fluid flow through the valve. Successively uncovered ducts provide shorter fluid paths to provide a flow rate that increases as the distance the plug moves from the seat increases. The ducts cause the fluid to be broken up into discrete jets, which reduce the noise caused by high velocity fluid flowing over the seat. As the valve plug moves away from the seat, the flow through the ducts diminishes, so that as the valve plug approaches its fully open position, the flow through the ducts is minimal, thus providing a valve with a low intensity noise level when throttling and a low pressure drop when fully open.
Inventors
- 👤 Ivor J Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86759; Y10T137/86791
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
267 words
A throttle valve having a body portion, a fluid inlet port and a fluid outlet port, a valve seat between said inlet and outlet ports and a plug, said plug having an annular seating surface which registers with said valve seat to stop fluid from flowing from said inlet to said outlet port, said valve also having a ring disposed upstream of of said valve seat and comprising an inner generAlly cylindrical surface, a plurality of ducts disposed in said ring, and a plurality of conduits disposed in said ring, each duct being in direct communication with at least one conduit and so disposed that the fluid flows in series through said ducts and their associated conduits, said plug having a generally cylindrical portion slightly smaller in diameter than the cylindrical portion of said ring, said plug being concentric with and movable relative to said ring, said ducts and conduits in said ring being so disposed that, as said plug moves away from said valve seat, fluid flows through an increasing number of ducts and conduits, and the length of said ducts and said conduits being such that the path through successively activated ducts and conduits becomes shorter, whereby the rate of increase of flow increases as the distance said plug moves from said valve increases to a position wherein said plug moves away from said ring, and said ring, ducts and conduits being so disposed within the valve that upon said plug reaching its fully open position the flow through said ducts and conduits is minimal, thereby minimizing the pressure drop across the fully open valve.
Claim 2
Dependent Claim
267 words
A throttle valve having a body portion, a fluid inlet port and a fluid outlet port, a valve seat between said inlet and outlet ports and a plug, said plug having an annular seating surface which registers with said valve seat to stop fluid from flowing from said inlet to said outlet port, said valve also having a ring disposed upstream of of said valve seat and comprising an inner generAlly cylindrical surface, a plurality of ducts disposed in said ring, and a plurality of conduits disposed in said ring, each duct being in direct communication with at least one conduit and so disposed that the fluid flows in series through said ducts and their associated conduits, said plug having a generally cylindrical portion slightly smaller in diameter than the cylindrical portion of said ring, said plug being concentric with and movable relative to said ring, said ducts and conduits in said ring being so disposed that, as said plug moves away from said valve seat, fluid flows through an increasing number of ducts and conduits, and the length of said ducts and said conduits being such that the path through successively activated ducts and conduits becomes shorter, whereby the rate of increase of flow increases as the distance said plug moves from said valve increases to a position wherein said plug moves away from said ring, and said ring, ducts and conduits being so disposed within the valve that upon said plug reaching its fully open position the flow through said ducts and conduits is minimal, thereby minimizing the pressure drop across the fully open valve.
Claim 3
Dependent Claim
93 words
A valve set forth in claim 1, having the ring, ducts and conduits so disposed, relative to the flow of fluid passing the ducts and conduits, that the flow through some of the ducts and conduits is reversed, when the plug is a small distance from the ring, whereby the fluid flowing past the downstream portion of the ring remains close thereto, which results in a reduction in the turbulence in the fluid flowing past said ring, and a reduction in the noise and pressure drop resulting from the throttling of the fluid.
Claim 4
Dependent Claim
41 words
A valve as set forth in claim 1, wherein the ducts are generally parallel to the cylindrical surface of the ring and the cross sectional area of the ducts decreases as the distance from the cylindrical portion of the ring increases.
Claim 5
Dependent Claim
29 words
A valve as set forth in claim 3, wherein the number of conduits with which a duct is in communication decreases as the cross-sectional area of the ducts decreases.
Claim 6
Dependent Claim
21 words
A valve as set forth in claim 4, wherein the ducts and conduits are, generally, at right angles to each other.
Claim 7
Dependent Claim
17 words
A valve as set forth in claim 5, wherein the ducts and conduits are generally round holes.
Claim 8
Dependent Claim
27 words
A valve as set forth in claim 5, wherein the conduits are holes that extend readily through the ring and are sealed adjacent the outer periphery thereof.
Claim 9
Dependent Claim
65 words
A valve as set forth in claim 7, wherein the ducts are disposed in circumferentially spaced groups in the ring, each duct in the outermost group being in communication with a conduit in a row of conduits adjacent the valve seat and the successive inner circumferentially spaced groups of ducts are in communication with conduits in rows spaced successively greater distances from the valve seat.
Claim 10
Dependent Claim
122 words
A valve as set forth in claim 1 having a ring with a generally radially extending surface from which the ducts originate, and a segment of a generally toroidal surface joining said radially extending surface to the cylindrical surface extending upstream of the valve seat to provide a fluid flow path across said surfaces wherein the fluid flowing through some of the ducts and conduits reverses direction causing the fluid to remain close to the ring as it passes thereby when the valve plug is moved a small distance from the ring thereby causing a reduction in the turbulence of the fluid stream passing the downstream portion of the ring, a lower pressure drop across the valve and a minimal noise level.
Claim 11
Dependent Claim
17 words
A valve as set forth in claim 1, wherein the ring is integral with the valve seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |