CA2106935A1 - Fluid flow control system - Google Patents
Fluid flow control systemInfo
- Publication number
- CA2106935A1 CA2106935A1 CA 2106935 CA2106935A CA2106935A1 CA 2106935 A1 CA2106935 A1 CA 2106935A1 CA 2106935 CA2106935 CA 2106935 CA 2106935 A CA2106935 A CA 2106935A CA 2106935 A1 CA2106935 A1 CA 2106935A1
- Authority
- CA
- Canada
- Prior art keywords
- run
- fluid flow
- valve
- electrical signal
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
- G01F7/005—Volume-flow measuring devices with two or more measuring ranges; Compound meters by measuring pressure or differential pressure, created by the use of flow constriction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0324—With control of flow by a condition or characteristic of a fluid
- Y10T137/0379—By fluid pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2562—Dividing and recombining
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention features a system for actuating additional fluid flow lines at a transfer station, without the continuous venting or bleeding of fluid. The transfer station operates its supply lines, or runs, at differential pressures ranging from 15 to 85 inches of water. It is desirable to maintain differential pressure in the primary line, or in the combination of primary and secondary lines at mid-range, at about 50 inches of water. The system of the invention entails replacing the existing constant bleed pneumatic controller with an electromechanical no-bleed controller.
The present invention features a system for actuating additional fluid flow lines at a transfer station, without the continuous venting or bleeding of fluid. The transfer station operates its supply lines, or runs, at differential pressures ranging from 15 to 85 inches of water. It is desirable to maintain differential pressure in the primary line, or in the combination of primary and secondary lines at mid-range, at about 50 inches of water. The system of the invention entails replacing the existing constant bleed pneumatic controller with an electromechanical no-bleed controller.
Description
2~9~
IMPROVED FLUID F`LOW CONTROL SYSTEM
' . .
Field of the Invention The present invention pertains to the controls for measuring fluid flow consumption, and, more particularly, to an improved system for controlling the flow of natural gas in a natural gas measuring and transfer station.
BACKGROUND OF THE INVENTION
Many natural gas distribution companies purchase natural gas from gas transmission companies at designated purchase stationsr where the amount of natural gas being sold is measured. The natural gas at these purchase stations is heated, measured and reduced in pressure.
:. , Until the late 1970s, archaic orifice meters were used to measure the amount of the gas being transferred from transmission and distribution points. Most of the transfer . , . . - ., ~:, . -stations maintained multiple orifice meter runs (supply lines) arranged in parallel. Parallel meter runs were ~ ;~
necessary in order to obtain accurate measurements of the ~ ~ ~
gas flow with respect to the measuring lnstruments' water ~;;
column range of 0 to 100 inches of water. The measurementwas found to be most accurate in the 50-inch ~or, the mid-range of differential pressure) measurement. Therefore, gas flowing at 85 inches of water through a primary line, for example, was diverted through a parallel, secondary line.
This adjusted the differential pressure in each of the .' ' . '~
Docket No. NYSEG 101 ' ' ' , ,.~, ,, ~.
2 1 0 6 9 3 ~ ~
primary and secondary lines to 40 inches of water (the mid- -range of the water columns), and avoided exceeding the upper measurement limits of the instruments.
The transmission companies using these multiple run systems typically utilize a constant bleed pneumatic limit ~low controller to activate the parallel orifice meter runs.
In the late 1970s, the use of liquefied natural gas prompted the transmission companies to install sophisticated electronic measuring devices in order to bill their customers for the amount of energy being transferred in each line, rather than measuring the volume of the flowing fluido Today, despite the capability for electronic control and measurement of natural gas at each purchase station, the transfer companies ~re still using the old-fashioned limit flow control equipment for gaseous natural gas transmission.
In order to regulate the gaseous flow between runs, the current constant bleed pneumatic controllers needlessly `~
waste approximately 1,437 standard cubic feet of natural gas each hour that they are in operation, i.e., when both runs are allowing gas to flow therethrough. This mode o~
operation i5 most prevalent in the winter months, when there is a greater demand for heating fuels. Although only small amounts of gas are being vented, it has been determined that the cumulative costs are great.
The present invention is a system for replacing the constant bleed pneumatic controllers for these trans~er stations, thus providing the means by which substantial Docket No. NYS~G-101 2 .-.
.. .. ...
. , . - ... . . ~- .. . - -, . .. ;, .. ;;, .... . .
21~93~
savings in fuel and money can be realized.
~ , Discussion of Related Art In United States Patent No. 3,555,901, issued to Delatorre et al on January 19, 1971, for "Method of and Apparatus for Measuriny Varying Fluid Flow", a dual-metered line is illustrated having a fluid flow computer which governs the switchover controls. As the flow rate is measured, the fluid, in response thereto, is directed into the alternate line. ;
The aforementioned system differs from the present ;
invention in Delatorre et al require a computer to control the flow, and the flow rate in the line must be calculated The present invention is far less complex, and its cost is minimal. The differential transducer used by the present invention already exists on site at each transfer station. ;~
q1hQ circuitry of the invention requires only one solenoid valve to do the switching between the runs, instead of the three solenoid valves of the aforementioned patented system. ;
, ' ', ' ' ' .' SUMMARY OF THE INVENTION
In accordance with the present invention, there is pro~ided a system for actuating additional fluid flow lines at a transfer station, without the venting or bleeding of fluid. The transfer station operates its supply lines, or runs, at differential pressures, usually ranging from 15 to 85 inches of water. It is desirable to maintain Docket No. NYSEG-101 3 " ' ~ ' :
- ;.
differential pressure in the primary line, or in the combination of primary and secondary lines at mid-range, of about 50 inches of water. The system of the invention entails replacing the existing constant bleed pneumatic controller with an electromechanical no-bleed control circuit. The circuit of the system includes a dif~erential pressure transducer that provides an electrical signal that indicates the pressure drop across the supply lines. The differential pressure transducer controls a three-way, no-bleedl solenoid control valve that is designed to beordinarily in the closed position, with the exhaust port open to the atmosphere. This control valve operates in the inventive system with the second fluid flow run in a position that is usually open. This is necessary; if the supply line were closed during a power loss, an excessive pressure drop would result in a shortage of supply. In addition, if this line were indeed closed, a pressure drop greater than 100 inches o~ water would not be measurable;
hence, fluid would be supplied without an accounting thereof.
As fluid ~lows through the supply line and across the orifice plates of the dual-run system, the differential pressure transducer (which is tapped across the orifice plate in the primary run) measures the pressure drop. An electrical signal is generated that is indicative of this pressure drop. The signal is transmitted to a switching relay. When the upper or lower pressure limits in the primary line are reached, the generated signal will cause the relay to respectively activate or deactivate the three-way, no-bleed, solenoid valve. This will, in turn, allow ~`luid to flow not only through the primary run, but through Docket No. NYSEG-101 4 . . .
2i~93~
both the primary and the secondary runs.
BRIEF DESCRIPTION OF THE DRAWINGS
A complete understanding of the present invention may .. : .
b~ obtained by reference to the accompanying drawings, considered in conjunction with the subsequent, detailed description, in which: ~ :
FIGURE 1 illustrates a systematic diagram of a prior art purchase station fluid supply system; and .
- , FIGURE 2 depicts a schematic diagram of the circuitry ..
of the invention, as applied to the purchase station shown : .
in FIGURE 1. .. :-:- ,' .~ '' :' DESCRIPTION OF THE PREFERRED EMBODIMENT
Generally speaking, the invention seeks to eliminate the constant bleeding and venting of natural gas in a `~
switching valve that controls the gas flowing through the lines of a purchase station. ~he bleeding of the gas has never posed a serious problem in the past, due to the very ~ - :
small amounts of waste. However, given this era of greater fuel conservation, these minimal amounts of waste have been shown to eventually accumulate to produce significant ~ . ~
losses. The bleed valve of the purchase flow system has ` ~ ~ -been replaced with a non-venting valve and a simplified .
control apparatus in order to conserve fuel and protect the -environment. ~.-:
'- . , Docket No. NYSEG-101 5 ;~ :
-, ~
- - --... .,. "~" .. ;
21~6~3~ ~
Now referring to FIGURE 1, a prior art natural gas flow , _ system for a purchase station 10 is illustrated. The purchase station 10 comprises a main supply line 11 for incoming natural gas to be measured, as well as an outgoing, purchaser gas line 14. In order to accurately measure the gas being supplied to the user during high demand periods, it is necessary to divide the gas flow into two gas lines;
primary run 12 and secondary run 22 are shown. This is distilled as a result of the measurement process. It has been found that greater measurement accuracy is obtained when measurement of the flow is conducted at mid-pressure range, or approximately 50 inches of water. Therefore, when demand in the primary line l~ approaches the upper measurement limit of 85 inches of water, the flow is switched; it is then carried by the additional secondary run 22, as well as by the primary run 12. In this manner, the flow in both lines will carry a differential pressure of 15.0 inches of water or greater. Similarly, when the pressure drops below 15 inches of water in both lines, it is advantageous to switch the flow back to just one line, i.e., the primary line 12.
Ori~ices 13 and 23 disposed in each run, 12 and 22, respectively, are set to a certain size. Gauges 15 and 16 ~-;,,~. ., respectively measure the differential pressure across each orifice. A bleed-type pressure valve 17 allows for the opening of flow through the secondary run 22 during peak demand periods.
In order to switch the gas flow without the venting or bleeding o~ natural gas during high demand periods, the present invention then eliminates the bleed-type switching Docket No. NYSEG-101 6 9 3 ~
valve 17. This bleed-type valve 17 is now replaced with a , ~
thrae-way, no-bleed, solenoid-actuated valve, which is actuated by the control circuit, shown in FIGURE 2.
Referring to FIGURE 2, a schematic of the control circuit 100 of this invention is illustrated. The natural gas flow (arrow 25) in the incoming supply line 11 is directed to the primary and secondary runs 12 and 22, respectively. Gas flows (arrows 30 and 31) respectively through runs 12 and 22 and passes across respective orifice plates 27 and 37. A differential pressure transducer 32, tapped across the orifice plate 27 of the primary run 12, measures the pressure drop. The differential pressure transducer 32 is manufactured by Honeywell. The transducer 32 will trans~it a signal in the range of approximately between 4 and 20ma, which is proportional to the corresponding pressure range of between 0 and 100 inches of water column drop across the orifice 27. The signal is directed along line 40 to an integrated control circuit 41.
When the pressure limit of 15 inches is sensed across orifice 27, the signal will correspond to 0.64v, using a lO0 `
ohm resistor. When the pressure limit of 85 inches is sensed across orifice 27, the signal will correspond to 1.76v. A relay (not shown) which is part of circuit 41 is actuated by the respective transducer signals to open and close a three-way, no-bleed solenoid valve 35. The relay is a 9-volt, 18m coil, 120 AC, 1 amp relay powered from a ~15 volt transformer. The three-way solenoid valve 35, manufactured by ASCO, controls the on-oEf valve 36 disposed , in the secondary run 22 via line~3~. A 24-volt transformer is used to power the transducer 32.\
' ~`(, ` ~' ' ~;
. , Docket No. NYSEG-101 7 ;~;
, .__.. ~..... . -- . . .
2 ~ 3 ~ .
A high signal of 1.76v from transducer 32, corresponding to 85 inches of water across orifice 27, will trigger the relay of circuit ~1 to output a 0 psig signal to on-off valve 36. This will cause the on-off valve 36 to open the flow in the secondary run 22. A low signal of 0.64v from transducer 32 will cause the on-off valve 36 to output a 15 psig signal and close or restrict the flow of the secondary run 22.
A flow computer 50, shown connected to transducer 32, can be used to process the signals being generated by the existing electronic measurement equipment in order to calculate the amount of energy transferred. The computer 50, per se, is not part of this invention.
The inventive circuitry herein is very simple, and it utilizes the transducer 32 already available at most pur~hase station sites for measuring natural gas. The cost of converting the available equipment is minimal, and the retrofitting of each purchase station is quickly amortized by the savings in conserved fuel.
Since other modifications and changes varied to fit particular operating requirements and environments will be apparent to those skilled in the art, the invention is not considered limited to the example chosen for purposes of disclosure, and covers all changes and modifications which do not constitute departures from the true spirit and scope of this invention.
Docket No. NYSEG-101 8 :
... ,. .. , ~ , .
2~693~ :
Havin~ thus described the present invention, what is desired to be protected by I.etters ~atent is presented in the subsequently appended claims. -What is claimed is: ~
'! '. ' ~' . '~' ~
",'''`' ' .~,,'". . ,`' ~.''"
::'" ," ".
'','~ , ~'' Docket No. NYSEG-101 9 ~ ~
.;~- ~ , .
IMPROVED FLUID F`LOW CONTROL SYSTEM
' . .
Field of the Invention The present invention pertains to the controls for measuring fluid flow consumption, and, more particularly, to an improved system for controlling the flow of natural gas in a natural gas measuring and transfer station.
BACKGROUND OF THE INVENTION
Many natural gas distribution companies purchase natural gas from gas transmission companies at designated purchase stationsr where the amount of natural gas being sold is measured. The natural gas at these purchase stations is heated, measured and reduced in pressure.
:. , Until the late 1970s, archaic orifice meters were used to measure the amount of the gas being transferred from transmission and distribution points. Most of the transfer . , . . - ., ~:, . -stations maintained multiple orifice meter runs (supply lines) arranged in parallel. Parallel meter runs were ~ ;~
necessary in order to obtain accurate measurements of the ~ ~ ~
gas flow with respect to the measuring lnstruments' water ~;;
column range of 0 to 100 inches of water. The measurementwas found to be most accurate in the 50-inch ~or, the mid-range of differential pressure) measurement. Therefore, gas flowing at 85 inches of water through a primary line, for example, was diverted through a parallel, secondary line.
This adjusted the differential pressure in each of the .' ' . '~
Docket No. NYSEG 101 ' ' ' , ,.~, ,, ~.
2 1 0 6 9 3 ~ ~
primary and secondary lines to 40 inches of water (the mid- -range of the water columns), and avoided exceeding the upper measurement limits of the instruments.
The transmission companies using these multiple run systems typically utilize a constant bleed pneumatic limit ~low controller to activate the parallel orifice meter runs.
In the late 1970s, the use of liquefied natural gas prompted the transmission companies to install sophisticated electronic measuring devices in order to bill their customers for the amount of energy being transferred in each line, rather than measuring the volume of the flowing fluido Today, despite the capability for electronic control and measurement of natural gas at each purchase station, the transfer companies ~re still using the old-fashioned limit flow control equipment for gaseous natural gas transmission.
In order to regulate the gaseous flow between runs, the current constant bleed pneumatic controllers needlessly `~
waste approximately 1,437 standard cubic feet of natural gas each hour that they are in operation, i.e., when both runs are allowing gas to flow therethrough. This mode o~
operation i5 most prevalent in the winter months, when there is a greater demand for heating fuels. Although only small amounts of gas are being vented, it has been determined that the cumulative costs are great.
The present invention is a system for replacing the constant bleed pneumatic controllers for these trans~er stations, thus providing the means by which substantial Docket No. NYS~G-101 2 .-.
.. .. ...
. , . - ... . . ~- .. . - -, . .. ;, .. ;;, .... . .
21~93~
savings in fuel and money can be realized.
~ , Discussion of Related Art In United States Patent No. 3,555,901, issued to Delatorre et al on January 19, 1971, for "Method of and Apparatus for Measuriny Varying Fluid Flow", a dual-metered line is illustrated having a fluid flow computer which governs the switchover controls. As the flow rate is measured, the fluid, in response thereto, is directed into the alternate line. ;
The aforementioned system differs from the present ;
invention in Delatorre et al require a computer to control the flow, and the flow rate in the line must be calculated The present invention is far less complex, and its cost is minimal. The differential transducer used by the present invention already exists on site at each transfer station. ;~
q1hQ circuitry of the invention requires only one solenoid valve to do the switching between the runs, instead of the three solenoid valves of the aforementioned patented system. ;
, ' ', ' ' ' .' SUMMARY OF THE INVENTION
In accordance with the present invention, there is pro~ided a system for actuating additional fluid flow lines at a transfer station, without the venting or bleeding of fluid. The transfer station operates its supply lines, or runs, at differential pressures, usually ranging from 15 to 85 inches of water. It is desirable to maintain Docket No. NYSEG-101 3 " ' ~ ' :
- ;.
differential pressure in the primary line, or in the combination of primary and secondary lines at mid-range, of about 50 inches of water. The system of the invention entails replacing the existing constant bleed pneumatic controller with an electromechanical no-bleed control circuit. The circuit of the system includes a dif~erential pressure transducer that provides an electrical signal that indicates the pressure drop across the supply lines. The differential pressure transducer controls a three-way, no-bleedl solenoid control valve that is designed to beordinarily in the closed position, with the exhaust port open to the atmosphere. This control valve operates in the inventive system with the second fluid flow run in a position that is usually open. This is necessary; if the supply line were closed during a power loss, an excessive pressure drop would result in a shortage of supply. In addition, if this line were indeed closed, a pressure drop greater than 100 inches o~ water would not be measurable;
hence, fluid would be supplied without an accounting thereof.
As fluid ~lows through the supply line and across the orifice plates of the dual-run system, the differential pressure transducer (which is tapped across the orifice plate in the primary run) measures the pressure drop. An electrical signal is generated that is indicative of this pressure drop. The signal is transmitted to a switching relay. When the upper or lower pressure limits in the primary line are reached, the generated signal will cause the relay to respectively activate or deactivate the three-way, no-bleed, solenoid valve. This will, in turn, allow ~`luid to flow not only through the primary run, but through Docket No. NYSEG-101 4 . . .
2i~93~
both the primary and the secondary runs.
BRIEF DESCRIPTION OF THE DRAWINGS
A complete understanding of the present invention may .. : .
b~ obtained by reference to the accompanying drawings, considered in conjunction with the subsequent, detailed description, in which: ~ :
FIGURE 1 illustrates a systematic diagram of a prior art purchase station fluid supply system; and .
- , FIGURE 2 depicts a schematic diagram of the circuitry ..
of the invention, as applied to the purchase station shown : .
in FIGURE 1. .. :-:- ,' .~ '' :' DESCRIPTION OF THE PREFERRED EMBODIMENT
Generally speaking, the invention seeks to eliminate the constant bleeding and venting of natural gas in a `~
switching valve that controls the gas flowing through the lines of a purchase station. ~he bleeding of the gas has never posed a serious problem in the past, due to the very ~ - :
small amounts of waste. However, given this era of greater fuel conservation, these minimal amounts of waste have been shown to eventually accumulate to produce significant ~ . ~
losses. The bleed valve of the purchase flow system has ` ~ ~ -been replaced with a non-venting valve and a simplified .
control apparatus in order to conserve fuel and protect the -environment. ~.-:
'- . , Docket No. NYSEG-101 5 ;~ :
-, ~
- - --... .,. "~" .. ;
21~6~3~ ~
Now referring to FIGURE 1, a prior art natural gas flow , _ system for a purchase station 10 is illustrated. The purchase station 10 comprises a main supply line 11 for incoming natural gas to be measured, as well as an outgoing, purchaser gas line 14. In order to accurately measure the gas being supplied to the user during high demand periods, it is necessary to divide the gas flow into two gas lines;
primary run 12 and secondary run 22 are shown. This is distilled as a result of the measurement process. It has been found that greater measurement accuracy is obtained when measurement of the flow is conducted at mid-pressure range, or approximately 50 inches of water. Therefore, when demand in the primary line l~ approaches the upper measurement limit of 85 inches of water, the flow is switched; it is then carried by the additional secondary run 22, as well as by the primary run 12. In this manner, the flow in both lines will carry a differential pressure of 15.0 inches of water or greater. Similarly, when the pressure drops below 15 inches of water in both lines, it is advantageous to switch the flow back to just one line, i.e., the primary line 12.
Ori~ices 13 and 23 disposed in each run, 12 and 22, respectively, are set to a certain size. Gauges 15 and 16 ~-;,,~. ., respectively measure the differential pressure across each orifice. A bleed-type pressure valve 17 allows for the opening of flow through the secondary run 22 during peak demand periods.
In order to switch the gas flow without the venting or bleeding o~ natural gas during high demand periods, the present invention then eliminates the bleed-type switching Docket No. NYSEG-101 6 9 3 ~
valve 17. This bleed-type valve 17 is now replaced with a , ~
thrae-way, no-bleed, solenoid-actuated valve, which is actuated by the control circuit, shown in FIGURE 2.
Referring to FIGURE 2, a schematic of the control circuit 100 of this invention is illustrated. The natural gas flow (arrow 25) in the incoming supply line 11 is directed to the primary and secondary runs 12 and 22, respectively. Gas flows (arrows 30 and 31) respectively through runs 12 and 22 and passes across respective orifice plates 27 and 37. A differential pressure transducer 32, tapped across the orifice plate 27 of the primary run 12, measures the pressure drop. The differential pressure transducer 32 is manufactured by Honeywell. The transducer 32 will trans~it a signal in the range of approximately between 4 and 20ma, which is proportional to the corresponding pressure range of between 0 and 100 inches of water column drop across the orifice 27. The signal is directed along line 40 to an integrated control circuit 41.
When the pressure limit of 15 inches is sensed across orifice 27, the signal will correspond to 0.64v, using a lO0 `
ohm resistor. When the pressure limit of 85 inches is sensed across orifice 27, the signal will correspond to 1.76v. A relay (not shown) which is part of circuit 41 is actuated by the respective transducer signals to open and close a three-way, no-bleed solenoid valve 35. The relay is a 9-volt, 18m coil, 120 AC, 1 amp relay powered from a ~15 volt transformer. The three-way solenoid valve 35, manufactured by ASCO, controls the on-oEf valve 36 disposed , in the secondary run 22 via line~3~. A 24-volt transformer is used to power the transducer 32.\
' ~`(, ` ~' ' ~;
. , Docket No. NYSEG-101 7 ;~;
, .__.. ~..... . -- . . .
2 ~ 3 ~ .
A high signal of 1.76v from transducer 32, corresponding to 85 inches of water across orifice 27, will trigger the relay of circuit ~1 to output a 0 psig signal to on-off valve 36. This will cause the on-off valve 36 to open the flow in the secondary run 22. A low signal of 0.64v from transducer 32 will cause the on-off valve 36 to output a 15 psig signal and close or restrict the flow of the secondary run 22.
A flow computer 50, shown connected to transducer 32, can be used to process the signals being generated by the existing electronic measurement equipment in order to calculate the amount of energy transferred. The computer 50, per se, is not part of this invention.
The inventive circuitry herein is very simple, and it utilizes the transducer 32 already available at most pur~hase station sites for measuring natural gas. The cost of converting the available equipment is minimal, and the retrofitting of each purchase station is quickly amortized by the savings in conserved fuel.
Since other modifications and changes varied to fit particular operating requirements and environments will be apparent to those skilled in the art, the invention is not considered limited to the example chosen for purposes of disclosure, and covers all changes and modifications which do not constitute departures from the true spirit and scope of this invention.
Docket No. NYSEG-101 8 :
... ,. .. , ~ , .
2~693~ :
Havin~ thus described the present invention, what is desired to be protected by I.etters ~atent is presented in the subsequently appended claims. -What is claimed is: ~
'! '. ' ~' . '~' ~
",'''`' ' .~,,'". . ,`' ~.''"
::'" ," ".
'','~ , ~'' Docket No. NYSEG-101 9 ~ ~
.;~- ~ , .
Claims (11)
1. A system for actuating, monitoring or controlling additional fluid flow lines at a transfer station without the venting or bleeding of fluid during high demand periods of fluid flow, comprising:
a primary fluid flow run;
a secondary fluid flow run;
a transducer operatively connected to said primary fluid flow run for generating an electrical signal in response to fluid flow pressure in said primary fluid flow run;
a three-way, no-bleed solenoid valve connected to said transducer, said three-way, no-bleed solenoid valve providing a pressure signal in response to said electrical signal generated by said transducer; and an on-off valve operatively connected within said secondary fluid flow run, and said three-way, no-bleed solenoid valve, said on-off valve operatively restricting flow in said secondary fluid flow run in response to said pressure signal of said three-way, no-bleed solenoid valve.
a primary fluid flow run;
a secondary fluid flow run;
a transducer operatively connected to said primary fluid flow run for generating an electrical signal in response to fluid flow pressure in said primary fluid flow run;
a three-way, no-bleed solenoid valve connected to said transducer, said three-way, no-bleed solenoid valve providing a pressure signal in response to said electrical signal generated by said transducer; and an on-off valve operatively connected within said secondary fluid flow run, and said three-way, no-bleed solenoid valve, said on-off valve operatively restricting flow in said secondary fluid flow run in response to said pressure signal of said three-way, no-bleed solenoid valve.
2. The system in accordance with claim 1, wherein said transducer is connected across an orifice disposed in said primary fluid flow run.
3. The system in accordance with claim 1, wherein said transducer will generate high and low electrical signals in response to respective high and low pressure limits in said primary fluid flow run, or subsequent runs as dictated by flow requirements.
4. The system in accordance with claim 3, further comprising a control circuit including a relay, said control circuit operatively disposed between said transducer and said three-way, no-bleed solenoid valve, whereby a high electrical signal from said transducer will actuate said relay, causing said three-way, no-bleed solenoid valve to close, thereby opening said on-off valve.
5. An electromechanical flow controlling system for modifying flow through a fluid measuring station, comprising:
a primary run for conveying fluid;
a secondary run for conveying fluid;
an on-off valve disposed in said secondary run for allowing and restricting fluid flow therethrough:
and an electromechanical circuit connected to said on-off valve, and operatively connected to said primary run, said electromechanical circuit measuring fluid flow differential pressure in said primary run, and in response thereto, providing respective high and low signals corresponding to respective high and low fluid flow pressures in said primary run, said high signal being operative to open said on-off valve, and said low signal being operative to close said on-off valve, whereby said high and low fluid flow differential pressures in said primary run control the fluid flow through said secondary run.
a primary run for conveying fluid;
a secondary run for conveying fluid;
an on-off valve disposed in said secondary run for allowing and restricting fluid flow therethrough:
and an electromechanical circuit connected to said on-off valve, and operatively connected to said primary run, said electromechanical circuit measuring fluid flow differential pressure in said primary run, and in response thereto, providing respective high and low signals corresponding to respective high and low fluid flow pressures in said primary run, said high signal being operative to open said on-off valve, and said low signal being operative to close said on-off valve, whereby said high and low fluid flow differential pressures in said primary run control the fluid flow through said secondary run.
6. The electromechanical flow controlling system in accordance with claim 5, wherein said primary run further comprises an orifice, said electromechanical circuit further comprising a transducer connected across said orifice for measuring a differential pressure across said orifice, and, in response thereto, generating an electrical signal utilized to actuate said on-off valve.
7. The electromechanical flow controlling system in accordance with claim 6, further comprising a three-way, no-bleed solenoid valve disposed between said transducer and said on-off valve, said three-way, no-bleed solenoid valve generating a pressure signal in response to said electrical signal of said transducer, said pressure signal respectively opening and closing said on-off valve.
8. A method of controlling fluid flow in a transfer station, comprising the steps of:
a) measuring differential pressure in a primary run;
b) generating an electrical signal in response to the pressure measurement in step (a);
c) utilizing said electrical signal to actuate a no-bleed solenoid valve to generate a pressure signal in response thereto; and d) opening and closing an on-off valve disposed in a secondary run, to alternately allow and restrict fluid flow therethrough, in response to said generated pressure signal.
a) measuring differential pressure in a primary run;
b) generating an electrical signal in response to the pressure measurement in step (a);
c) utilizing said electrical signal to actuate a no-bleed solenoid valve to generate a pressure signal in response thereto; and d) opening and closing an on-off valve disposed in a secondary run, to alternately allow and restrict fluid flow therethrough, in response to said generated pressure signal.
9. The method of claim 8, wherein said generating electrical signal step (b) further comprises the steps of:
e) generating a high electrical signal corresponding to an upper differential pressure measurement in said primary run, said high electrical signal causing said on-off valve to open, thus allowing fluid to flow in said secondary run; and f) generating a low electrical signal corresponding to a lower pressure measurement in said primary run, said low electrical signal causing said on-off valve to close, thus restricting fluid flow in said secondary run.
e) generating a high electrical signal corresponding to an upper differential pressure measurement in said primary run, said high electrical signal causing said on-off valve to open, thus allowing fluid to flow in said secondary run; and f) generating a low electrical signal corresponding to a lower pressure measurement in said primary run, said low electrical signal causing said on-off valve to close, thus restricting fluid flow in said secondary run.
10. A method of controlling fluid flow in a transfer station, comprising the steps of:
a) measuring differential pressure in a primary run;
b) generating an electrical signal in response to the pressure measurement in step (a); and c) utilizing said electrical signal to actuate an on-off valve disposed in a secondary run, thereby opening and closing said on-off valve to alternately allow and restrict fluid flow in said secondary run.
a) measuring differential pressure in a primary run;
b) generating an electrical signal in response to the pressure measurement in step (a); and c) utilizing said electrical signal to actuate an on-off valve disposed in a secondary run, thereby opening and closing said on-off valve to alternately allow and restrict fluid flow in said secondary run.
11. The method of claim 10, wherein said generating electrical signal step (b) further comprises the steps of:
e) generating a high electrical signal corresponding to an upper differential pressure measurement in said primary run, said high electrical signal causing said on-off valve to open, thus allowing fluid to flow in said secondary run; and f) generating a low electrical signal corresponding to a lower pressure measurement in said primary run, said low electrical signal causing said on-off valve to close, thus restricting fluid flow in said secondary run.
e) generating a high electrical signal corresponding to an upper differential pressure measurement in said primary run, said high electrical signal causing said on-off valve to open, thus allowing fluid to flow in said secondary run; and f) generating a low electrical signal corresponding to a lower pressure measurement in said primary run, said low electrical signal causing said on-off valve to close, thus restricting fluid flow in said secondary run.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/902,220 US5269334A (en) | 1992-06-22 | 1992-06-22 | Fluid flow control system |
| CA 2106935 CA2106935A1 (en) | 1992-06-22 | 1993-09-24 | Fluid flow control system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/902,220 US5269334A (en) | 1992-06-22 | 1992-06-22 | Fluid flow control system |
| CA 2106935 CA2106935A1 (en) | 1992-06-22 | 1993-09-24 | Fluid flow control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2106935A1 true CA2106935A1 (en) | 1995-03-25 |
Family
ID=25676670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2106935 Abandoned CA2106935A1 (en) | 1992-06-22 | 1993-09-24 | Fluid flow control system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5269334A (en) |
| CA (1) | CA2106935A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4856905B2 (en) * | 2005-06-27 | 2012-01-18 | 国立大学法人東北大学 | Flow rate variable type flow control device |
| US9383758B2 (en) | 2005-06-27 | 2016-07-05 | Fujikin Incorporated | Flow rate range variable type flow rate control apparatus |
| US9921089B2 (en) | 2005-06-27 | 2018-03-20 | Fujikin Incorporated | Flow rate range variable type flow rate control apparatus |
| JP4690827B2 (en) * | 2005-08-26 | 2011-06-01 | 株式会社フジキン | Gasket type orifice and pressure type flow control device using the same |
| JP5430007B2 (en) * | 2008-05-21 | 2014-02-26 | 株式会社フジキン | Discontinuous flow rate switching control method for fluid using pressure type flow rate control device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2949125A (en) * | 1952-11-28 | 1960-08-16 | Rockwell Mfg Co | Fluid flow system and control therefor |
| US3158174A (en) * | 1961-06-20 | 1964-11-24 | Cities Service Oil Co | Safety shut off for fluid loading |
| US3470896A (en) * | 1965-01-07 | 1969-10-07 | Jay P Au Werter | Parallel line fluid system with meter regulating valve |
| US3369561A (en) * | 1966-05-04 | 1968-02-20 | Halliburton Co | System for automatic regulation of flow rate and pressure at a remote location |
| US3555901A (en) * | 1968-09-27 | 1971-01-19 | Camco Inc | Method of and apparatus for measuring varying fluid flow |
| US4481967A (en) * | 1979-11-15 | 1984-11-13 | Rosemount Inc. | Control circuit for current to pressure converter |
| CH662895A5 (en) * | 1983-09-27 | 1987-10-30 | Fischer Ag Georg | METHOD AND DEVICE FOR REGULATING A SIZE. |
| US4561458A (en) * | 1984-11-19 | 1985-12-31 | Spence Engineering Company | Steam-metering method and apparatus |
-
1992
- 1992-06-22 US US07/902,220 patent/US5269334A/en not_active Expired - Fee Related
-
1993
- 1993-09-24 CA CA 2106935 patent/CA2106935A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5269334A (en) | 1993-12-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |