CN201568735U - Atmospheric pressure balanced type quick switching valve - Google Patents
Atmospheric pressure balanced type quick switching valve Download PDFInfo
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- CN201568735U CN201568735U CN2009202710442U CN200920271044U CN201568735U CN 201568735 U CN201568735 U CN 201568735U CN 2009202710442 U CN2009202710442 U CN 2009202710442U CN 200920271044 U CN200920271044 U CN 200920271044U CN 201568735 U CN201568735 U CN 201568735U
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- way switch
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Abstract
An atmospheric pressure balanced type quick switching valve comprises a valve I, a valve II, a valve III, a T-tube switching valve, a valve V, a valve VI, a gassing tank, a pipeline I, a pipeline II, a pipeline III, an exhaust pipe, an air intake pipe, a stagnation container and a spray nozzle, wherein the valve I is mounted between the pipeline I and the gassing tank; the valve II is mounted between the pipeline I and the exhaust pipe; the valve III is mounted between the pipeline II and the pipeline III, so as to communicate the pipeline II and the pipeline III when opened; the T-tube switching valve is mounted at the junction of the pipeline I, the pipeline II and the pipeline III; the valve V is mounted between the air intake pipe and the stagnation container; the valve VI is mounted between the pipeline III and the exhaust pipe; and the spray nozzle is mounted at one end of the stagnation container into which the pipeline II is inserted. The utility model has the advantages that the problems of gas backflow during the valve switching process at the end of the inflation to the gas flow calibration facility can be avoided, the accuracy of the gas flow calibration facility is improved, a single three-way valve has no synchronous problem, and the gas circuit switching time is shortened.
Description
Technical field
The utility model relates to the gas flow standard device field, particularly the quick selector valve device of a kind of air pressure balanced-type.
Background technique
The working principle of gas flow standard device is the reference value that obtains gas flow by the gas flow of the calibrated flowmeter of flowing through in the accurate measurement certain hour interval.The general quick acting valve that uses switches gas flow direction and time synchronisation in gas flow standard device.As Fig. 1, general two independent valve (outlet valve and gas charging valve) of using in the existing at home and abroad gas flow standard device, control the switch of each valve respectively by controller, the order that sends by control signal makes two valves sequence switch as required, to realize the switching of gas circuit.For example the simple gas flow meter of the PVTt flow standard device of America NI ST, U.S. Southwest Research Inst., " natural gas flow measuring station, West-east Gas engineering Nanjing, Sichuan China all adopts this mode in positive Chinese rock gas large capacity meter amount station.
Use in the scheme that two independent valve realize that gas circuits switch, two valves synchronously whether accurately and repeat directly to influence the device degree of accuracy, whole in addition gas circuit be switching time two valve event times with, gas circuit is slower switching time.
If inflationtime is longer, then the error that causes switching time of gas circuit is less, but and the aeration tank volume is certain and gas flow when big, must shorten switching time, the error that causes thus then can the station owner be led the status.
Among the article UNCERTAINTY INPRIMARY GAS FLOW STANDARDS DUE T0FLOW WORK PHENOMENA that John D.Wright and Aaron N.Johnson writes the gas circuit handoff procedure of gas flow meter is analyzed.Article points out that gas circuit is switched can be divided into two kinds of patterns.First kind is inflation " zero lap " pattern, and promptly in the gas circuit handoff procedure, after a valve was closed fully, another valve was opened again, and two valve event times do not have overlapping; Second kind is " overlapping " pattern, promptly in the gas circuit handoff procedure, when a valve is not closed fully, open when another valve has been opened, two valve event time have one section overlapping.For first kind of pattern, need guarantee during design system gas circuit is switched moment the upstream critical flow nozzle do not lose threshold state, and in the process that gas circuit switching beginning is closed fully to two valves, the temperature and pressure in the zone in valve downstream nozzle downstream can must be considered the influence of this part because inflation is done work effect and risen rapidly when system works.(this pattern can be overlapping when switching of two valves for second kind of pattern, also can be the excessive effects of triple valve Lock-in in handoff procedure), overlap condition helps to alleviate because the temperature, pressure fast rise that inflation acting effect causes, but under this pattern, can occur three directions of a bit of time in the gas circuit handoff procedure is communicated with mutually, this moment, the gas flow state will be owing to working pressure, temperature and flow different and unpredictable state occurs, the phenomenon of gas " refluence " in the time of the inflation end for example may occurring, owing to can't accurately calculate and revise, this will cause negative effect to the degree of accuracy of device.
The model utility content
The purpose of this utility model is that the spy provides a kind of air pressure balanced-type quick selector valve device for accurate measurement gas flow.
In the design in the big flow standard device of gas, big at gas flow, under the certain situation of gas collection vessel volume, inflationtime shortens relatively, this moment is owing to the error that the gas circuit handoff procedure causes will be occupied an leading position, but because the inside nominal diameter of pipeline and valve is all bigger during big flow, the movement speed of big valve is subjected to the restriction of aspects such as driving mechanism and valve material, can't reach very high movement speed.If first kind of pattern introducing in the employing background technique, use two independent valve to realize the scheme that gas circuit is switched, whole gas circuit switching time is two valve event time sums, and gas circuit is longer switching time, and whether two valves are synchronously accurately and repeat also can influence the device degree of accuracy.If select the aforesaid second kind of pattern that adopt for use, adopt single triple valve to be used for the switching of gas circuit, triple valve gas " refluences " phenomenon may occur in moment that inflation finishes to switch to discharge directions in the handoff procedure, is difficult to calculate correction.
The utility model provides a kind of air pressure balanced-type quick selector valve device, it is characterized in that: the quick selector valve device of described air pressure balanced-type comprises valve 1, valve 22, valve 33, three-way switch valve 4, valve 55, valve 66, aeration tank 7, pipeline 1, pipeline 29, pipeline 3 10, outlet pipe 11, suction tude 12, stagnation container 13, nozzle 14;
Wherein: valve 1 is installed between pipeline 1 and the aeration tank 7, valve 22 is installed between pipeline 1 and the outlet pipe 11, valve 33 is installed between pipeline 29 and the pipeline 3 10, connecting pipe 29 and pipeline 3 10 when opening, three-way switch valve 4 is installed in the intersection of pipeline 1, pipeline 29 and pipeline 3 10, valve 55 is installed between suction tude 12 and the stagnation container 13, valve 66 is installed between pipeline 3 10 and the outlet pipe 11, and nozzle 14 is installed in pipeline 29 and inserts on the end in the stagnation containers 13.
Described nozzle 14 is a critical flow venturi nozzle.
The utility model has selected for use single three-way switch valve 4 to be used for the switching of gas circuit, has increased valve 66 between three-way switch valve 4 and outlet pipe 11, and has designed a controlled gas pipeline that has valve 33 between pipeline 29 and outlet pipe 11; In calibration operation, by valve 66 control, make in inflation and finish before three-way switch valve 4 switches to outlet pipe 11 directions, it is equal substantially to make three-way switch valve 4 change to the pressure of the both direction that swaps out, and this design is called the quick switching valve of air pressure balanced-type system.
The phenomenon of the gas described in the background technique " refluence " has been avoided in this design substantially, has improved the degree of accuracy of gas flow standard device; There is not stationary problem in single three-way switch valve 4; Use a three-way switch valve 4 to replace two separate valve also to shorten gas circuit switching time.
Be the working principle that example illustrates this system with the positive-pressure type gas flow meter below:
As Fig. 2, change in the process at three-way switch valve 4, because the pressure of three-way switch valve 4 both sides is very approaching, all near barometric pressure, therefore can think, if do not consider the variation of three-way switch valve 4 speed, in the whole handoff procedure, flowing to three-way switch valve 4 both sides flows is near symmetrical, and it is identical with the gas flow of pipeline 3 10 promptly to flow to pipeline 1.
If do not have valve valve 33 and connecting pipeline, and do not have valve 66, the direct platoon tracheae 11 of the direction that swaps out of three-way switch valve 4 is in the process that swaps out when inflation finishes, because the pressure P at pipeline one 8 places
1Near the goal pressure in the weighing container, and the pressure P at pipeline 3 10 places
2Then near barometric pressure, gas when swapping out in the pipeline 1 might be with " refluence " to pipeline 3 10, the amount of " refluence " and the flow through flow of nozzle 14 and the pressure correlation at three-way switch valve 4 places are variable quantities, will have a uncertain factor like this.
For fear of this " refluence " situation, the discharge directions increase valve valve 66 at three-way switch valve 4 designs a pipeline between between pipeline 29 and the pipeline 3 10, when control with the connection between pipeline 29 and the pipeline 3 10 by valve 33.Before changing to, valve valve 33 is in closed condition, after changing to end, software control is throttle down 66 at once, valve 66 close put in place after, Open valve 33 at once, make between pipeline 29 and the pipeline 3 10 to be communicated with, like this when calibration finishes fast three-way switching valve 4 and swaps out, the P of three-way switch valve 4 both sides
1And P
2Pressure is basic identical, so just avoided aforesaid " refluence " phenomenon, and the gas flow of flow ipe 3 10 can calculate equally by volume, the pressure and temperature of pipeline 3 10, is finally revised to get final product when calculating the gas gross mass.
Advantage of the present utility model:
1. the problem of gas " refluence " in the valve handoff procedure, the degree of accuracy that has improved gas flow meter are avoided when the gas flow standard device inflation finishes in the design of the quick switching valve of air pressure balanced-type.
2. there is not stationary problem in single triple valve.
3. use three-way valve to replace two separate valve also to help to have shortened gas circuit switching time.
Description of drawings
Below in conjunction with drawings and the embodiments the utility model is described in further detail:
Fig. 1 is traditional gas flow standard device stream switch mode schematic representation;
Fig. 2 is the quick selector valve device schematic representation of air pressure balanced-type.
Embodiment
Present embodiment provides a kind of air pressure balanced-type quick selector valve device, it is characterized in that: the quick selector valve device of described air pressure balanced-type comprises valve 1, valve 22, valve 33, three-way switch valve 4, valve 55, valve 66, aeration tank 7, pipeline 1, pipeline 29, pipeline 3 10, outlet pipe 11, suction tude 12, stagnation container 13, nozzle 14;
Wherein: valve 1 is installed between pipeline 1 and the aeration tank 7, valve 22 is installed between pipeline 1 and the outlet pipe 11, valve 33 is installed between pipeline 29 and the pipeline 3 10, connecting pipe 29 and pipeline 3 10 when opening, three-way switch valve 4 is installed in the intersection of pipeline 1, pipeline 29 and pipeline 3 10, valve 55 is installed between suction tude 12 and the stagnation container 13, valve 66 is installed between pipeline 3 10 and the outlet pipe 11, and nozzle 14 is installed in pipeline 29 and inserts on the end in the stagnation containers 13.
Described nozzle 14 is a critical flow venturi nozzle.
The utility model has selected for use single three-way switch valve 4 to be used for the switching of gas circuit, has increased valve 66 between three-way switch valve 4 and outlet pipe 11, and has designed a controlled gas pipeline that has valve 33 between pipeline 29 and outlet pipe 11; In calibration operation, by valve 66 control, make in inflation and finish before three-way switch valve 4 switches to outlet pipe 11 directions, it is equal substantially to make three-way switch valve 4 change to the pressure of the both direction that swaps out, and this design is called the quick switching valve of air pressure balanced-type system.
The phenomenon of the gas described in the background technique " refluence " has been avoided in this design substantially, has improved the degree of accuracy of gas flow standard device; There is not stationary problem in single three-way switch valve 4; Use a three-way switch valve 4 to replace two separate valve also to shorten gas circuit switching time.
Be the working principle that example illustrates this system with the positive-pressure type gas flow meter below:
As Fig. 2, change in the process at three-way switch valve 4, because the pressure of three-way switch valve 4 both sides is very approaching, all near barometric pressure, therefore can think, if do not consider the variation of three-way switch valve 4 speed, in the whole handoff procedure, flowing to three-way switch valve 4 both sides flows is near symmetrical, and it is identical with the gas flow of pipeline 3 10 promptly to flow to pipeline 1.
If do not have valve valve 33 and connecting pipeline, and do not have valve 66, the direct platoon tracheae 11 of the direction that swaps out of three-way switch valve 4 is in the process that swaps out when inflation finishes, because the pressure P at pipeline one 8 places
1Near the goal pressure in the weighing container, and the pressure P at pipeline 3 10 places
2Then near barometric pressure, gas when swapping out in the pipeline 1 might be with " refluence " to pipeline 3 10, the amount of " refluence " and the flow through flow of nozzle 14 and the pressure correlation at three-way switch valve 4 places are variable quantities, will have a uncertain factor like this.
For fear of this " refluence " situation, the discharge directions increase valve valve 66 at three-way switch valve 4 designs a pipeline between between pipeline 29 and the pipeline 3 10, when control with the connection between pipeline 29 and the pipeline 3 10 by valve 33.Before changing to, valve valve 33 is in closed condition, after changing to end, software control is throttle down 66 at once, valve 66 close put in place after, Open valve 33 at once, make between pipeline 29 and the pipeline 3 10 to be communicated with, like this when calibration finishes fast three-way switching valve 4 and swaps out, the P of three-way switch valve 4 both sides
1And P
2Pressure is basic identical, so just avoided aforesaid " refluence " phenomenon, and the gas flow of flow ipe 3 10 can calculate equally by volume, the pressure and temperature of pipeline 3 10, is finally revised to get final product when calculating the gas gross mass.
Claims (2)
1. quick selector valve device of air pressure balanced-type, it is characterized in that: the quick selector valve device of described air pressure balanced-type comprises valve one (1), valve two (2), valve three (3), three-way switch valve (4), valve five (5), valve six (6), aeration tank (7), pipeline one (8), pipeline two (9), pipeline three (10), outlet pipe (11), suction tude (12), stagnation container (13), nozzle (14);
Wherein: valve one (1) is installed between pipeline one (8) and the aeration tank (7), valve two (2) is installed between pipeline one (8) and the outlet pipe (11), valve three (3) is installed between pipeline two (9) and the pipeline three (10), connecting pipe two (9) and pipeline three (10) when opening, three-way switch valve (4) is installed in pipeline one (8), the intersection of pipeline two (9) and pipeline three (10), valve five (5) is installed between suction tude (12) and the stagnation container (13), valve six (6) is installed between pipeline three (10) and the outlet pipe (11), and nozzle (14) is installed in pipeline two (9) and inserts on the interior end of stagnation container (13).
2. according to the quick selector valve device of the described air pressure balanced-type of claim 1, it is characterized in that: described nozzle (14) is a critical flow venturi nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202710442U CN201568735U (en) | 2009-11-26 | 2009-11-26 | Atmospheric pressure balanced type quick switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202710442U CN201568735U (en) | 2009-11-26 | 2009-11-26 | Atmospheric pressure balanced type quick switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201568735U true CN201568735U (en) | 2010-09-01 |
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ID=42661024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202710442U Expired - Lifetime CN201568735U (en) | 2009-11-26 | 2009-11-26 | Atmospheric pressure balanced type quick switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201568735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080766B (en) * | 2009-11-26 | 2013-06-05 | 中国航空工业集团公司沈阳发动机设计研究所 | Air pressure balance type quick transfer valve |
-
2009
- 2009-11-26 CN CN2009202710442U patent/CN201568735U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080766B (en) * | 2009-11-26 | 2013-06-05 | 中国航空工业集团公司沈阳发动机设计研究所 | Air pressure balance type quick transfer valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100901 Effective date of abandoning: 20091126 |
|
| RGAV | Abandon patent right to avoid regrant |