Measuring and testing – With fluid pressure – Leakage
Patent
1998-06-12
2000-10-10
Williams, Hezron
Measuring and testing
With fluid pressure
Leakage
73 405A, G01M 300
Patent
active
061289469
ABSTRACT:
A method and apparatus for on-line detection of leaky emergency shutdown or other valves in a fluid transport system having an upstream pipe, a downstream pipe and the valve connected between the upstream pipe and the downstream pipe for controlling fluid flow through the system. The valve has at least one upstream seal and at least one downstream seal and an inner cavity effectively isolated by the seals from the fluid flow stream through the system. The apparatus comprises a first transducer in fluid communication with the fluid flow stream at at least one of: a predetermined distance upstream of the upstream seal; and a predetermined distance downstream of the downstream seal. The first transducer is for sensing pressure pulsations resulting from at least one of: dynamic energy due to fluid flow through the transport system; and transient energy within the fluid in the transport system after the valve is closed and for generating representative electrical signals as a function of time. A second transducer is in fluid communication with the inner cavity of the valve for sensing substantially simultaneous pressure pulsations within the inner cavity and for generating second representative electrical signals as a function of time. An analyzer receives the first and second electrical signals and generates at least one of: a frequency response function; and a coherence function. The generated function is sufficiently averaged to provide a meaningful measure of the degree to which the two electrical signals are related to thereby indicate whether, and to what extent, sensed pressure pulsations within the fluid transport system are passed through at least one of the seals to the inner cavity.
REFERENCES:
patent: 3398544 (1976-02-01), Berhaerts
patent: 3592967 (1971-07-01), Harris
patent: 3814207 (1974-06-01), Kusuda et al.
patent: 3930556 (1976-01-01), Kusuda et al.
patent: 3938544 (1976-02-01), Bernaerts
patent: 4051714 (1977-10-01), Fechter et al.
patent: 4066095 (1978-01-01), Massa
patent: 4287581 (1981-09-01), Neale, Sr.
patent: 4289019 (1981-09-01), Claytor
patent: 4373838 (1983-02-01), Foreman, et al.
patent: 4435974 (1984-03-01), Fuchs et al.
patent: 4543817 (1985-10-01), Sugiyama
patent: 4596133 (1986-06-01), Smalling et al.
patent: 4747309 (1988-05-01), Weir
patent: 4821769 (1989-04-01), Mills et al.
patent: 4858462 (1989-08-01), Coulter et al.
patent: 4957136 (1990-09-01), Gavrila
patent: 5008841 (1991-04-01), McElroy
patent: 5031446 (1991-07-01), Saito et al.
patent: 5038614 (1991-08-01), Bseisu et al.
patent: 5056758 (1991-10-01), Bramblet
patent: 5089997 (1992-02-01), Pecukonis
patent: 5136876 (1992-08-01), Taylor
patent: 5263682 (1993-11-01), Covert et al.
patent: 5329465 (1994-07-01), Arcella et al.
patent: 5333501 (1994-08-01), Okada et al.
patent: 5345812 (1994-09-01), Haboian
patent: 5349568 (1994-09-01), Kupperman et al.
patent: 5355324 (1994-10-01), Zhang
patent: 5361636 (1994-11-01), Farstad et al.
patent: 5400645 (1995-03-01), Kunze et al.
patent: 5416724 (1995-05-01), Savic
patent: 5433104 (1995-07-01), Kunze et al.
patent: 5531111 (1996-07-01), Okamoto, et al.
patent: 5533383 (1996-07-01), Greene et al.
patent: 5535136 (1996-07-01), Standifer
patent: 5548530 (1996-08-01), Baumoel
patent: 5557969 (1996-09-01), Jordan
patent: 5616829 (1997-04-01), Balaschak et al.
patent: 5623421 (1997-04-01), Savic
patent: 5625150 (1997-04-01), Greene et al.
patent: 5650943 (1997-07-01), Powell et al.
patent: 5675506 (1997-10-01), Savic
patent: 5904669 (1999-05-01), Schildgen, et al.
Heagerty David Q.
Leon Robert L.
Crane Nuclear, Inc.
Wiggins J. David
Williams Hezron
LandOfFree
Method and apparatus for on-line detection of leaky emergency sh does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for on-line detection of leaky emergency sh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for on-line detection of leaky emergency sh will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2248732