Patent EP0057581A2 successfully refreshed from Google Patents.
EP0057581A2
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EP
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Method of and system for controlling pressure responsive regulator valve
Assignee: Grove Valve and Regulator Co
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Filing: 1982-01-28
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Granted: —
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Expires: 2002-01-28
Abstract
Abstract A method of and system for controlling a pipeline fluid parameter, including a main control valve (12) which is conditioned to open when upstream pressure (P 1 ) therein overcomes pressure (P j ) in a chamber (32) therein. The chamber is connected by load and bleed lines (34, 38) to a source of pressure and a low pressure zone, respectively, and normally closed control valves (40, 46) are provided in each of the lines. The valves (40, 46) are openable by solenoids in response to signals (40A, 44A) transduced from a fluid parameter for precise periods of time so that the valve chamber (32) is loaded or bled by small discrete volumetric increments of pressure fluid.
Inventors
- 👤 Walter 133 Danefield Place Connolly
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:02
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365; F16K7/00; F16K7/02; F16K7/04; F16K7/07; F16K7/075; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2093
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
A method of operating a pressure-responsive regulator valve (12) in a pipeline (36), which regulator valve is conditioned to open when upstream pressure (Pl) therein overcomes pressure (P.) in a chamber (32) therein, said method being characterized by the steps of connecting a load line (34) from a source of pressurized fluid to said chamber; connecting a bleed line (38) from said chamber to a zone of low pressure; providing in said bleed and load lines normally closed valves (40,44) with limited, predetermined flow capacities; operating said valves (40,44) to open flow through said load line of a measured volume of pressurized fluid to said chamber to enable flow through said regulator valve to achieve a desired flow characteristic value at a selected location in said pipeline and then closing said load line to flow; then monitoring the value of said flow characteristic; and operating said normally closed valves (40,44) to enable flow of small, measured volumetric quantities of fluid selectively through one of said load and bleed lines as needed to maintain said desired flow characteristic value.
Claim 2
Independent Claim
178 words
A method of operating a pressure-responsive regulator valve (12) in a pipeline (36), which regulator valve is conditioned to open when upstream pressure (Pl) therein overcomes pressure (P.) in a chamber (32) therein, said method being characterized by the steps of connecting a load line (34) from a source of pressurized fluid to said chamber; connecting a bleed line (38) from said chamber to a zone of low pressure; providing in said bleed and load lines normally closed valves (40,44) with limited, predetermined flow capacities; operating said valves (40,44) to open flow through said load line of a measured volume of pressurized fluid to said chamber to enable flow through said regulator valve to achieve a desired flow characteristic value at a selected location in said pipeline and then closing said load line to flow; then monitoring the value of said flow characteristic; and operating said normally closed valves (40,44) to enable flow of small, measured volumetric quantities of fluid selectively through one of said load and bleed lines as needed to maintain said desired flow characteristic value.
Claim 3
Dependent Claim
44 words
A method according to claim 1, characterized by operating said normally closed valves (40,44) to enable flow of small, measured volumetric quantities of fluid selectively through one of said load and bleed lines as needed to achieve a different value of said flow characteristic.
Claim 4
Dependent Claim
26 words
A method according to either preceding claim 1, characterized in that the source of pressurized fluid is the pipeline (36) upstream of the regulator valve (12).
Claim 5
Independent Claim
24 words
A method according to any preceding claim, characterized in that the zone of low pressure is the pipeline (36) downstream of said regulator valve.
Claim 6
Independent Claim
35 words
A method according to any one of claims 1 to 3, characterized in that the zone of low pressure is a reservoir (56) at a pressure lower than any pipeline pressure ( P 2 ).
Claim 7
Independent Claim
62 words
A method according to any preceding claim, characterized in that means (48) are provided on said pipeline (36) for sensing the value of said flow characteristic and generating a signal proportional thereto; a signal transmitting controller (52) being operated in response to said sensing means with the normally closed valves being conditioned to operate in response to signals received from said controller.
Claim 8
Independent Claim
113 words
A system for controlling the value of a fluid characteristic in a pipeline (36), which system includes a regulator valve (12) which is conditioned to open when upstream pressure (P 1 ) therein overcomes pressure (P . ) in a chamber (32) therein, said chamber being connected by a load line (34) to a source of fluid under pressure and by a bleed line (38) to a low pressure zone, said system being characterized in that it includes normally closed feed and bleed control valves (40,44), each of predetermined restricted flow capacity, in said load and bleed lines (34,38) respectively and means (48,52) for opening said control valves (40,44) selectively for limited periods.
Claim 9
Independent Claim
113 words
A system for controlling the value of a fluid characteristic in a pipeline (36), which system includes a regulator valve (12) which is conditioned to open when upstream pressure (P 1 ) therein overcomes pressure (P . ) in a chamber (32) therein, said chamber being connected by a load line (34) to a source of fluid under pressure and by a bleed line (38) to a low pressure zone, said system being characterized in that it includes normally closed feed and bleed control valves (40,44), each of predetermined restricted flow capacity, in said load and bleed lines (34,38) respectively and means (48,52) for opening said control valves (40,44) selectively for limited periods.
Claim 10
Dependent Claim
50 words
A control system according to claim 7, characterized in that said control valves (40,44) are solenoid operated; sensing means (48) are provided for operative connection to the pipeline(36)for generating electrical signals indicative of a fluid characteristic being monitored, means (52) being provided for transmitting said signals to said solenoid valves.
Claim 11
Dependent Claim
66 words
A control system according to claim 8, characterized in that said sensing means comprises first and second pressure switches (61,64) operative to generate electrical signals in response to, respectively, an increase in pressure above a set maximum and a reduction in pressure below a predetermined minimum; and conductor means (66,68) connecting said first and second pressure switches, respectively, to said bleed and feed control valves (44,40).
Claim 12
Dependent Claim
53 words
A control system according to claim 8, characterized in that said sensing means comprises a transducer (48) for generating electrical signals proportionate to the value of a fluid characteristic being monitored; a controller (52) conditioned to be energized by said transducer being provided to transmit signals to the solenoid operated control valves (40,44).
References Cited (Backward Citations)
No citation records indexed.
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