CN104595714A - Method and system for metering gas return amount on basis of automatic start-up of LNG dispenser - Google Patents
Method and system for metering gas return amount on basis of automatic start-up of LNG dispenser Download PDFInfo
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- CN104595714A CN104595714A CN201410826161.6A CN201410826161A CN104595714A CN 104595714 A CN104595714 A CN 104595714A CN 201410826161 A CN201410826161 A CN 201410826161A CN 104595714 A CN104595714 A CN 104595714A
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Abstract
The invention discloses a method and a system for metering gas return amount on the basis of automatic start-up of LNG dispenser. The method comprises the following steps: when the dispenser is electrified to run, timely acquiring a flow value in a gas return gun of the dispenser; comparing the acquired current flow value F0 in the gas return gun with the last acquired flow value F1; when the difference Delta(F0) between the current flow value F0 and the last flow value F1 achieves a preset value Fs, starting a gas return amount metering flag, starting to meter the gas return amount, and taking the last flow value F1 as an initial flow value; when gas dispensing is finished, acquiring a flow value F when the gas dispensing is finished, then the gas return amount is the difference F-F1 between the flow value F when the gas dispensing is finished and the initial flow value F1. The method provided by the invention is capable of automatically starting up the dispenser to meter the air return amount in a vehicle-mounted container, and accurately metering the air return amount without the need of manually operating the dispenser.
Description
Technical field
The present invention relates to LNG filling machine field, be specifically related to return-air gauge metering method and the system of the self-starting of a kind of LNG filling machine.
Background technique
The aerating of traditional LNG filling machine and return-air metering are all that artificial operation filling machine button carries out triggering the metering of automatical control system, and this kind of method needs to think and operate, convenient not.
Summary of the invention
Technical problem to be solved by this invention is to provide return-air gauge metering method and the system of the self-starting of a kind of LNG filling machine, automatically can start filling machine to measure the return-air amount in vehicle carried container, without the need to manual operation filling machine, just can accurately measure return-air amount.
The technological scheme that the present invention solves the problems of the technologies described above is as follows:
On the one hand, provide a kind of self-starting return-air gauge metering method of LNG filling machine, described method comprises:
When filling machine powers on operation, the flow value in timing acquiring filling machine return-air rifle;
A front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection is compared;
When the difference △ F0 of a described present flow rate value F0 and front flow value F1 reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of a described front flow value F1 as metering;
When aerating completes, gather the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
Another invention, provide the return-air consumption metering system of a kind of LNG filling machine self-starting, described system comprises:
First acquisition module, when running for powering on when filling machine, the flow value in timing acquiring filling machine return-air rifle;
Comparison module, for comparing a front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection;
First starts module, for when the difference △ F0 of a described present flow rate value F0 and front flow value F1 reaches predetermined value Fs, starts return-air amount Calibrated markings, starts metering, and using a described front flow value F1 as initial flow value;
First time air volume calculation module, for when aerating completes, gathers the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
The return-air gauge metering method of a kind of LNG filling machine provided by the invention self-starting and system, when filling machine is to vehicle carried container aerating, flow value in Real-time Collection filling machine return-air rifle, if when the present flow rate value gathered reaches startup amount Fs with the difference of the last flow value gathered, start return-air amount Calibrated markings, return-air amount is measured, automatically can start filling machine and the return-air amount in vehicle carried container is measured, without the need to thinking operation filling machine, just can accurately measure return-air amount.
Accompanying drawing explanation
Fig. 1 is the return-air gauge metering method flow chart of a kind of LNG filling machine self-starting of the embodiment of the present invention one;
Fig. 2 is the whole flow chart of the return-air gauge amount of the embodiment of the present invention one;
Fig. 3 is the return-air consumption metering system schematic diagram of a kind of LNG filling machine self-starting of the embodiment of the present invention two.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
The return-air gauge metering method of embodiment one, the self-starting of a kind of LNG filling machine.Below in conjunction with Fig. 1 and Fig. 2, the method that the present embodiment provides is described in detail.
See Fig. 1, S101, when filling machine powers on operation, the flow value in timing acquiring filling machine return-air rifle.
S102, a front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection to be compared.
Concrete, can see Fig. 2, when client vehicles arrives LNG filling machine, when filling machine powers on and runs, no matter now which kind of state filling machine is in, and the return-air rifle of filling machine directly can be inserted the collection that vehicle carried container carries out return-air amount.Present embodiments provide a kind of method of autoweighing return-air amount, the return-air amount in timing acquiring return-air rifle, such as, within every 1 second, gather a return-air amount.If the current return-air amount gathered is F0, the return-air amount of the last time of collection is F1, then this current return-air amount F0 gathered and the last return-air amount F1 gathered are compared.
S103, when the difference △ F0 of a described present flow rate value F0 and front flow value F1 reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using a described front flow value F1 as initial flow value.
Concrete, the current return-air amount F0 that this gathers by above-mentioned steps compares with the last return-air amount F1 gathered, when the difference △ F0 of a present flow rate value F0 and front flow value F1 reaches predetermined value Fs (i.e. startup amount Fs), start the Calibrated markings of return-air amount, return-air amount is measured, and using the initial flow value of the front flow value F1 once gathered as metering.
S104, when aerating completes, gather the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
Concrete, after starting the Calibrated markings of return-air amount, after filling machine adds gas to vehicle carried container, gather the flow value F after adding gas, then return-air amount is now the flow value F of aerating when completing and the difference F-F1 of initial flow value F1, can carry out checkout process according to the return-air amount of this metering.
In addition, if when the difference △ F0 of the present flow rate value F0 in step S103 and a front flow value F1 does not reach (i.e. △ F0<Fs) predetermined value Fs (i.e. startup amount Fs), do not start return-air amount Calibrated markings, and flow value is gathered again.When the flow value F0 of the flow value F2 again gathered and current collection compares, if when the difference △ F2=F2-F0 of flow value F2 and present flow rate value F0 arrives predetermined value Fs (i.e. △ F2 >=Fs), start the Calibrated markings of return-air amount, return-air amount is measured, and using the initial flow value of the flow value F0 of current collection as metering.
After starting the Calibrated markings of return-air amount, after filling machine adds gas to vehicle carried container, gather the flow value F after adding gas, return-air amount is F-F0 in this case, and carries out checkout process according to this return-air amount.Now when the metering of return-air amount, do not consider △ F0 (namely carrying out drift filtration), improve the validity of return-air gauge amount, achieve the high-precision measuring of return-air amount.
The return-air consumption metering system of embodiment two, the self-starting of a kind of LNG filling machine.Below in conjunction with Fig. 3, the system that the present embodiment provides is described in detail.
See Fig. 3, the system that the present embodiment provides comprises the first acquisition module 301, comparison module 302, first starts module 303, first return-air amount metering module 304, second acquisition module 305, second acquisition module 306 and the second return-air amount metering module 307.
Wherein, the first acquisition module 301 is mainly used in when filling machine powers on operation, the flow value in timing acquiring filling machine return-air rifle.
Comparison module 302 is mainly used in a front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection to compare.
Concrete, when client vehicles arrives LNG filling machine, the return-air rifle of filling machine is directly inserted vehicle carried container, and the first acquisition module 301 carries out the collection of return-air amount in real time.Return-air amount in the first acquisition module 301 timing acquiring return-air rifle in the present embodiment, such as, gathers a return-air amount in every 1 second.If the current return-air amount gathered is F0, the return-air amount of the last time of collection is F1, then the current return-air amount F0 that this gathers by comparison module 302 compares with the last return-air amount F1 gathered.
First starts module 303 is mainly used in when the difference △ F0 of the present flow rate value F0 that comparison module 302 compares an and front flow value F1 reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of a front flow value F1 as metering.
First return-air amount metering module 304 is mainly used in when aerating completes, and gathers the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
Concrete, after first startup module 303 starts the Calibrated markings of return-air amount, after filling machine adds gas to vehicle carried container, gather the flow value F after adding gas, then first time air volume calculation module 304 return-air amount calculated now is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1, can carry out checkout process according to the return-air amount of this metering.
In addition, if when the difference △ F0 of the present flow rate value F0 that comparison module 302 compares and a front flow value F1 does not reach (i.e. △ F0<Fs) predetermined value Fs (i.e. startup amount Fs), do not start return-air amount Calibrated markings, now the second acquisition module 305 pairs of flow values gather again.The flow value F2 again gathered when the second acquisition module 305 and flow value F0 of current collection compares, if when the difference △ F2=F2-F0 of flow value F2 and present flow rate value F0 arrives predetermined value Fs (i.e. △ F2 >=Fs), second starts the Calibrated markings that module 306 starts return-air amount, return-air amount is measured, and using the initial flow value of the flow value F0 of current collection as metering.
After second startup module 306 starts the Calibrated markings of return-air amount, after filling machine adds gas to vehicle carried container, gather the flow value F adding weather, in this case, the return-air amount that second time air volume calculation module 307 calculates is F-F0, now when the metering of return-air amount, do not consider that △ F0 is (namely in the process of returning air volume calculation, carry out drift filtration treatment), improve the validity of return-air gauge amount, achieve the high-precision measuring of return-air amount.
The return-air gauge metering method of a kind of LNG filling machine provided by the invention self-starting and system, when filling machine powers on operation, flow value in Real-time Collection filling machine return-air rifle, if when the present flow rate value gathered reaches startup amount Fs with the difference of the last flow value gathered, start return-air amount Calibrated markings, return-air amount is measured, automatically can start filling machine and the return-air amount in vehicle carried container is measured, without the need to manual operation filling machine, just can accurately measure return-air amount; In addition, in the process of return-air gauge amount, filtration treatment is carried out to drift, improve the accuracy of return-air gauge amount.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a return-air gauge metering method for LNG filling machine self-starting, it is characterized in that, described method comprises:
Step S101, when filling machine power on run time, the flow value in timing acquiring filling machine return-air rifle;
Step S102, a front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection to be compared;
Step S103, when the difference △ F0 of a described present flow rate value F0 and front flow value F1 reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of a described front flow value F1 as metering;
Step S104, when aerating completes, gather the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
2. the return-air gauge metering method of a kind of LNG filling machine as claimed in claim 1 self-starting, it is characterized in that, described step S103 also comprises:
When the difference △ F0 of a described present flow rate value F0 and front flow value F1 does not reach predetermined value Fs, do not start return-air amount Calibrated markings, again acquisition stream value F2.
3. the return-air gauge metering method of a kind of LNG filling machine as claimed in claim 2 self-starting, is characterized in that, also comprise:
When the difference △ F2 of the flow value F0 of the described flow value F2 that again gathers and current collection reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of described present flow rate value F0 as metering.
4. the return-air gauge metering method of a kind of LNG filling machine as claimed in claim 3 self-starting, it is characterized in that, step S104 also comprises:
When aerating completes, gather flow value F when aerating completes, then return-air amount is F-F0.
5. a return-air consumption metering system for LNG filling machine self-starting, is characterized in that, described system comprises:
First acquisition module, when running for powering on when filling machine, the flow value in timing acquiring filling machine return-air rifle;
Comparison module, for comparing a front flow value F1 of the present flow rate value F0 in the return-air rifle of collection and collection;
First starts module, for when the difference △ F0 of a described present flow rate value F0 and front flow value F1 reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of a described front flow value F1 as metering;
First time air volume calculation module, for when aerating completes, gathers the flow value F of aerating when completing, then return-air amount is the flow value F of aerating when completing and the difference F-F1 of initial flow value F1.
6. the return-air consumption metering system of a kind of LNG filling machine as claimed in claim 5 self-starting, is characterized in that, also comprise:
Second acquisition module, for when the difference △ F0 of a present flow rate value F0 and front flow value F1 does not reach predetermined value Fs, does not start return-air amount Calibrated markings, again acquisition stream value F2.
7. the return-air consumption metering system of a kind of LNG filling machine as claimed in claim 6 self-starting, is characterized in that, also comprise:
Second starts module, when difference △ F2 for the flow value F0 as the described flow value F2 that again gathers and current collection reaches predetermined value Fs, start return-air amount Calibrated markings, start to measure return-air amount, and using the initial flow value of described present flow rate value F0 as metering.
8. the return-air consumption metering system of a kind of LNG filling machine as claimed in claim 7 self-starting, is characterized in that, also comprise:
Second time air volume calculation module, for when aerating completes, gather flow value F when aerating completes, then return-air amount is F-F0.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410826161.6A CN104595714B (en) | 2014-12-25 | 2014-12-25 | Method and system for metering gas return amount on basis of automatic start-up of LNG dispenser |
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| CN201410826161.6A CN104595714B (en) | 2014-12-25 | 2014-12-25 | Method and system for metering gas return amount on basis of automatic start-up of LNG dispenser |
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| CN104595714A true CN104595714A (en) | 2015-05-06 |
| CN104595714B CN104595714B (en) | 2017-05-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08211944A (en) * | 1995-02-07 | 1996-08-20 | Ishikawajima Harima Heavy Ind Co Ltd | Surge prevention controller for return gas blower |
| US20010025655A1 (en) * | 2000-03-24 | 2001-10-04 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for metering delivery quantity of ultra-low temperature liquefied gas |
| CN101968160A (en) * | 2009-07-28 | 2011-02-09 | 北京长征天民高科技有限公司 | Gas dispensation automatic control method and liquefied natural gas vehicle gas dispenser |
| CN203068130U (en) * | 2013-01-30 | 2013-07-17 | 成都华气厚普机电设备股份有限公司 | Electrical control system of general LNG (Liquefied Natural Gas) charging machine |
| CN203868689U (en) * | 2013-12-25 | 2014-10-08 | 江阴市富仁高科股份有限公司 | LNG (liquefied natural gas) dispenser with automatic return gas metering function |
| CN204005208U (en) * | 2014-06-17 | 2014-12-10 | 北京航天发射技术研究所 | LNG Liquefied natural gas LNG refueling system and LNG filling machine thereof |
-
2014
- 2014-12-25 CN CN201410826161.6A patent/CN104595714B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08211944A (en) * | 1995-02-07 | 1996-08-20 | Ishikawajima Harima Heavy Ind Co Ltd | Surge prevention controller for return gas blower |
| US20010025655A1 (en) * | 2000-03-24 | 2001-10-04 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for metering delivery quantity of ultra-low temperature liquefied gas |
| CN101968160A (en) * | 2009-07-28 | 2011-02-09 | 北京长征天民高科技有限公司 | Gas dispensation automatic control method and liquefied natural gas vehicle gas dispenser |
| CN203068130U (en) * | 2013-01-30 | 2013-07-17 | 成都华气厚普机电设备股份有限公司 | Electrical control system of general LNG (Liquefied Natural Gas) charging machine |
| CN203868689U (en) * | 2013-12-25 | 2014-10-08 | 江阴市富仁高科股份有限公司 | LNG (liquefied natural gas) dispenser with automatic return gas metering function |
| CN204005208U (en) * | 2014-06-17 | 2014-12-10 | 北京航天发射技术研究所 | LNG Liquefied natural gas LNG refueling system and LNG filling machine thereof |
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