CN101058400B - Liquefied natural gas aerating machine and aerating method - Google Patents
Liquefied natural gas aerating machine and aerating method Download PDFInfo
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- CN101058400B CN101058400B CN2006100117701A CN200610011770A CN101058400B CN 101058400 B CN101058400 B CN 101058400B CN 2006100117701 A CN2006100117701 A CN 2006100117701A CN 200610011770 A CN200610011770 A CN 200610011770A CN 101058400 B CN101058400 B CN 101058400B
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Abstract
The invention relates to the gas filling method for liquidized natural gas and the machine that comprises the shell, contact screen on the shell and several tubes. The several tubes comprise the return gas circuit with gas return opening, return gun interface and return gun connected through the vacuum metal hose, gas filling tube with liquid input connected through the vacuum metal hose, the first flow meter, pneumatic valve and gas filling gun, pre cooling connection pipe, gas return base and filling base connected through the vacuum metal hose. It is high in precision, quick and simple in structure.
Description
Technical field
The present invention relates to the Liquefied Natural Gas fuel loading technique, particularly a kind of improved liquefied natural gas aerating machine and aerating method.
Background technology
Liquefied natural gas (LNG) constantly obtains in the motor vehicle fuel field promoting as a kind of clean energy resource.Chinese patent No.CN200420003405.2 discloses a kind of liquefied natural gas aerating machine, and its principle is shown in Figure 1A, and LNG station system 3 comprises LNG basin 2 and gas station liquid feed device 18.LNG basin 2 is connected by the input port of vacuum line with gas station liquid feed device 18, the delivery port of gas station liquid feed device 18 is connected with the external port of the inlet 22 of filling machine by vacuum line 17 in the station, one end of circulating pipe 4 is connected with the external port of the circulation interface 23 of filling machine, and its other end is connected in the LNG basin 2.One end of muffler 5 is connected with the external port of filling machine return-air interface 24, and the other end puts in the LNG basin 2 and is connected with dissipation device 1.In addition, filling machine 6 comprises pipeline system, housing and is installed in keyboard and telltale on the housing; A feed liquor interface 22, circulation interface 23 and return-air interface 24 are arranged on filling machine 6, metal tube 10 is arranged on housing, this metal tube 10 is connected with air filling gun 12 by metallic hose 11, and flow counter 16, electromagnetic valve 14, unidirectional stop valve 13 and pressure sensor 9 successively are being connected in series between feed liquor interface 22 and metal tube 10; Be communicated with an end of electromagnetic valve 15 by a threeway between flow counter 16 and the electromagnetic valve 14, the other end of electromagnetic valve 15 is communicated with circulation interface 23 and air filling gun circulation interface 21, wherein air filling gun circulation interface 21 is arranged on the housing, and its inner port is communicated with electromagnetic valve 15 and circulation interface 23 by pipeline and a threeway; Also have a return-air rifle interface 25 on housing, its external port is connected with return-air rifle 20 by metallic hose 19, and the inner port of return-air rifle interface 25 is communicated with return-air interface 24 by pipeline.The scheme drawing of vehicle-mounted bottle 8 has been shown among Figure 1B, and vehicle-mounted bottle 8 has vehicle-mounted bottle feed liquor interface 27 and vehicle-mounted bottle return-air interface 28.
This filling machine is in when filling, and as shown in Figure 2, first step S101 receives return-air rifle 20 on the vehicle-mounted bottle return-air mouth 28, discharges the high-pressure evaporation gas in the vehicle-mounted bottle, its pressure is dropped to or near bar pressure.Second goes on foot S102, air filling gun 12 is received carried out the cryogenic media circulation on the air filling gun circulation port 21, gets rid of the boil-off gas in the pipeline.Then, air filling gun 12 is pulled down from air filling gun circulation port 21.The 3rd step S103 inserted air filling gun 12 on the vehicle-mounted bottle feed liquor interface 27 rapidly after second step, opened air filling gun, began to vehicle-mounted bottle filling LNG.Filling machine is pulled down air filling gun 12 after finishing filling, settles accounts with the numerical value that flow counter 16 is calculated.
There is following problem in this filling machine:
Measuring accuracy also need improve.When aerating, need return-air rifle 20 is received on the vehicle-mounted bottle return-air mouth 28, discharge the high-pressure evaporation gas in the vehicle-mounted bottle, its pressure is dropped to or near bar pressure.In this process, return-air is not measured, and in the numerical value that last flow counter 16 is calculated, do not deduct.Therefore its measuring accuracy is low, and its measuring accuracy changes along with the variation of the pressure size of boil-off gas in the volume size of vehicle-mounted bottle and the bottle.
In addition, the bicycle aerating time is long.Because return-air rifle 20 will be received on the vehicle-mounted bottle return-air mouth 28 before aerating, the high-pressure evaporation gas in the discharge vehicle-mounted bottle drops to its pressure or near bar pressure, this process spended time is long.Also have in cyclic process and can not in time judge there has not been gas in the pipeline,, need to prolong cycle time therefore in order to ensure full of liquid in the pipeline owing to it.Therefore total filling time of separate unit car is long.
Also have, filling machine has return-air interface 24, circulation interface 23,22 3 interfaces of inlet to be connected with station system, and pipeline is many, is vacuum pipeline owing to what be connected use with gas station, its cost height.The systematic pipeline complexity.And this filling machine is first return-air aerating begins before just, return-air not in filling process, and along with the rising of the interior boil-off gas pressure of vehicle-mounted bottle 8, aerating will stop, so it can't make full use of the storage capacity of vehicle-mounted bottle 8.
Summary of the invention
Therefore, technical matters to be solved by this invention is to provide a kind of LNG filling machine, and it has solved one or more problem that exists in the prior art basically.
On the other hand, the invention provides a kind of improved aerating method, can save the aerating time, increase adding amount.
Liquefied natural gas aerating machine according to the present invention comprises housing, be installed in touch-screen and control system and a plurality of pipeline on the housing, wherein, these a plurality of pipelines comprise return line, have successively by vacuum metal flexible pipe bonded assembly return-air mouth, return-air rifle interface and return-air rifle; The aerating pipeline has successively by vacuum metal flexible pipe bonded assembly inlet, first flow meter, pneumatic valve and air filling gun; And connecting line, have by vacuum metal flexible pipe bonded assembly return-air gun platform and aerating gun platform.
Wherein, this return-air rifle is arranged on the return-air gun platform and with it and is communicated with, and air filling gun is arranged on the aerating gun platform and with it and is communicated with.
Above-mentioned return-air mouth, return-air rifle interface, inlet, air filling gun interface, return-air gun platform and aerating gun platform are separately positioned on this housing.
Between return-air mouth and return-air rifle interface, also be connected with boiler check valve and compression indicator in turn on the return line.
Between boiler check valve and compression indicator, also be connected with second flow counter on this return line.
Between compression indicator and return-air rifle interface, also be connected with liquid sensor on this return line.
On the other hand, a kind of aerating method of liquefied natural gas, comprise and form a plurality of pipelines, comprise the formation return line, it has successively by metallic hose bonded assembly return-air mouth, return-air rifle interface and return-air rifle, forms the aerating pipeline, and it has successively by metallic hose bonded assembly inlet, first flow meter, pneumatic valve, air filling gun interface and air filling gun, with the formation connecting line, it has by metallic hose bonded assembly return-air gun platform and aerating gun platform; Connect this return line with gas station and be connected this aerating pipeline and gas station; By liquid feeding in the gas-adding pipe road direction vehicle-mounted bottle, simultaneously by return line with the boil-off gas return-air in the vehicle-mounted bottle to gas station.
Wherein, before liquid feeding and return-air step, also comprise being communicated with this return-air rifle and this return-air gun platform, and be communicated with this air filling gun and this aerating gun platform; And a plurality of pipelines of precooling connection.
Wherein, this precooling step comprises that opening this pneumatic valve flows liquefied natural gas in a plurality of pipelines of this connection.
Wherein, this return line also is provided with liquid sensor and closes this pneumatic valve to judge and to send the precooling end signal.
Wherein, be disposed with boiler check valve, second flow counter, compression indicator between this return line gas port last time and the liquid sensor.
Wherein, comprise that also the numerical value in the first flow metering deducts the numerical value of second flow counter metering as the clearing foundation.
Filling machine measuring accuracy height of the present invention, aerating speed are fast, simple in structure.
Filling machine of the present invention has increased liquid sensor, flow counter in return-air duct.Flow counter is used for return-air is measured, and what liquid sensor was used to guarantee in the liquid feeding process to flow through flow counter is gas, to guarantee the measuring accuracy of flow counter.Under the prerequisite that does not increase circulation line, utilize gas station liquid feed device, gas station hydraulic pipe, inlet, flow counter, pneumatic valve, air filling gun interface, metal vacuum flexible pipe, air filling gun, aerating gun platform, metallic hose, return-air seat, return-air rifle, metallic hose, return-air rifle interface, liquid sensor, compression indicator, flow counter, boiler check valve, return-air mouth, muffler, dissipation device, this loop of LNG basin to form pre-cold loop, be used to get rid of ducted boil-off gas, guaranteed the measuring accuracy of liquid flowmeter.Thereby guaranteed the high measuring accuracy of filling machine.
Plumbing connection of the present invention is simple, and this filling machine is compared with the CN200420003405.2 liquefied natural gas aerating machine, has removed circulation interface, simplified flow process, removed the circulating pipe in the gas station from, only needing provides muffler and two pipelines of aerating hydraulic pipe in the station, and pipeline connects simple.Thereby also saved the cost of building a station.
And filling machine aerating speed of the present invention is fast, can make filling of vehicle-mounted bottle reach the highest permission filling rate during liquid feeding.At first used liquid sensor, the precooling circulation time can in time judge in system, has saved system's precooling cycle time.Secondly, filling machine of the present invention uses two-tube filling, and in the vehicle-mounted bottle filling, the boil-off gas in the bottle is returned in the LNG basin via vapor return line by the return-air rifle at air filling gun, be used to reduce the pressure of boil-off gas in the vehicle-mounted bottle, allow to fill liquid level thereby can make the vehicle-mounted bottle liquid filling reach maximum.The liquid feeding return-air carries out simultaneously, has saved the return-air time, has simplified operating process.Technical requirements to vehicle-mounted bottle is low.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Appended accompanying drawing is used for further understanding the present invention and the part of book as an illustration, has represented embodiments of the invention, explains principle of the present invention together with the description, wherein
Figure 1A is the scheme drawing of existing liquefied natural gas aerating machine system;
Figure 1B is the scheme drawing of vehicle-mounted bottle;
Fig. 2 is the aerating method diagram of circuit of prior art;
Fig. 3 is the system schematic of filling machine of the present invention;
Fig. 4 is an aerating method diagram of circuit of the present invention.
The specific embodiment
Describe embodiments of the invention with reference to the accompanying drawings in detail.
Fig. 3 is the system schematic of filling machine of the present invention.LNG station system 3 structures shown in the figure are same as the prior art.Liquefied natural gas aerating machine 106 of the present invention comprises housing, is installed in touch-screen and control system (not shown) and a plurality of pipeline on the housing.Wherein, these a plurality of pipelines comprise return line 100; Aerating pipeline 200; With connecting line 300.Concrete, as shown in Figure 2, return line 100 comprises the part between return-air mouth 124, return-air rifle interface 125 and the return-air rifle 120, aerating pipeline 200 comprises the part between inlet 122, air filling gun interface 110 and the air filling gun 112, and connecting line 300 comprises that return-air gun platform 126 is to the part between the aerating gun platform 129.This inlet 122, return-air mouth 124 can be connected with station system 3 respectively.Return-air gun platform 126, aerating gun platform 129, air filling gun interface 110, return-air rifle interface 125 are separately positioned on the housing.Air filling gun interface 110 is connected with air filling gun 112 by metal vacuum flexible pipe 111.Air filling gun 112 can be placed in the post-11.2 on the aerating gun platform 129 ' locate, and be communicated with aerating gun platform 129, as shown in phantom in FIG..Further, between air filling gun interface 110 and feed liquor interface 122, can be connected in series successively pneumatic valve 114, first flow meter 116.Be connected by metallic hose 130 between return-air gun platform 126 internal orifices and aerating gun platform 129 internal orifices.Return-air rifle interface 125 is connected with return-air rifle 120 by metallic hose 119.Return-air rifle 120 can be placed in position 120 on the return-air gun platform 126, locates, and is communicated with return-air gun platform 126, as shown in phantom in FIG..Liquid sensor 131, compression indicator 109, second flow counter 107, boiler check valve 113 successively can be connected in series between return-air rifle interface 125 and return-air interface 124.Second flow counter 107 between return-air rifle interface 125 and return-air interface 124 is used for return-air is measured, to improve the measuring accuracy of filling machine.Liquid sensor 131 is used for carrying out the cryogenic media circulation time at filling machine and in time judges in the pipeline whether be liquid entirely, to reduce cycle time; And in filling process, when being full of, in time sends vehicle-mounted bottle danger signal.
On the other hand, as shown in Figure 4, the invention provides a kind of aerating method of liquefied natural gas, comprise step S201, form above-mentioned a plurality of pipelines, comprise return line at least, have successively by metallic hose bonded assembly return-air mouth, return-air rifle interface and return-air rifle; The aerating pipeline has successively by metallic hose bonded assembly inlet, first flow meter, pneumatic valve, air filling gun interface and air filling gun; And connecting line, have by metallic hose bonded assembly return-air gun platform and aerating gun platform.At step S202, the connection return line is with gas station and be connected aerating pipeline and gas station then; Then at step S203 by liquid feeding in the gas-adding pipe road direction vehicle-mounted bottle, simultaneously by return line with the boil-off gas return-air in the vehicle-mounted bottle to gas station.Before last liquid feeding and return-air step S203, can also comprise step: be communicated with return-air rifle and return-air gun platform, and be communicated with air filling gun and aerating gun platform; And a plurality of pipelines that are communicated with are somebody's turn to do in precooling.This precooling step can comprise: open aforementioned pneumatic valve liquefied natural gas is flowed in a plurality of pipelines of this connection.Liquid sensor can also be set on this return line close described pneumatic valve to judge and to send the precooling end signal.Can set gradually boiler check valve, second flow counter, compression indicator between return-air mouth on this return line and the liquid sensor.Finally, this method deducts the numerical value of second flow counter metering as the clearing foundation in the numerical value of first flow metering.Concrete, the preferred embodiment according to the present invention is for example used filling machine of the present invention, and when being in readiness for action, return-air rifle 120 is connected with return-air gun platform 126, and air filling gun 112 is connected with aerating gun platform 129.When filling machine is given automobile mounted bottle of 8 liquid feedings, at first press the precooling button, pneumatic valve 114 is opened, gas station liquid feed device 18, gas station hydraulic pipe 17, inlet 122, first flow meter 116, pneumatic valve 114, air filling gun interface 110, metal vacuum flexible pipe 111, air filling gun 112, aerating gun platform 129, metallic hose 130, return-air seat 126, return-air rifle 120, metallic hose 119, return-air rifle interface 125, liquid sensor 131, compression indicator 109, second flow counter 107, boiler check valve 113, return-air mouth 124, muffler 5, dissipation device 1, LNG basin 2 forms a unidirectional circuit.Liquefied natural gas flows in this loop, and when flow of liquid was through liquid sensor 131 in the pipeline, liquid sensor in time judged and send precooling end signal SELF CL pneumatic valve 114.Then, air filling gun 112 is connected with feed liquor interface 27 on the vehicle-mounted bottle 8, presses the aerating button, pneumatic valve 114 is opened automatically, beginning liquid feeding in vehicle-mounted bottle 8.With return-air rifle 120, be connected, the boil-off gas in the vehicle-mounted bottle 8 is got back in the LNG basin 2 by return-air mouth 28, return-air rifle 120, metallic hose 119, return-air rifle interface 125, liquid sensor 131, compression indicator 109, second flow counter 107, boiler check valve 113, return-air mouth 124, muffler 5, dissipation device 1 subsequently with feed liquor interface 28 on the vehicle-mounted bottle 8.When liquid feeding finishes, pull down return-air rifle 120, air filling gun 112 respectively and be connected with return-air gun platform 126, aerating gun platform 129 respectively.Filling machine deducts the numerical value of second flow counter, 107 meterings as the clearing foundation with the numerical value of first flow meter 116 meterings.What liquid sensor 131 was used to guarantee in the liquid feeding process to flow through second flow counter 107 is gas, to guarantee the measurement of flow counter.
It is to be appreciated that those skilled in the art that under the prerequisite that does not break away from the spirit or scope of the present invention, the present invention also has various improvement and variation.Therefore, various improvement of the present invention and variation are included in the scope of the present invention that is limited by appended claims and equivalent thereof.
Claims (12)
1. a liquefied natural gas aerating machine comprises housing, is installed in touch-screen and control system and a plurality of pipeline on the housing, it is characterized in that described a plurality of pipelines comprise
Return line has successively by metallic hose bonded assembly return-air mouth, return-air rifle interface and return-air rifle;
The aerating pipeline has successively by metallic hose bonded assembly inlet, first flow meter, pneumatic valve, air filling gun interface and air filling gun; With
Connecting line has by metallic hose bonded assembly return-air gun platform and aerating gun platform.
2. liquefied natural gas aerating machine as claimed in claim 1 is characterized in that, described return-air rifle is arranged on the described return-air gun platform and with it and is communicated with, and described air filling gun is arranged on the described aerating gun platform and with it and is communicated with.
3. liquefied natural gas aerating machine as claimed in claim 1 is characterized in that, described return-air mouth, return-air rifle interface, inlet, air filling gun interface, return-air gun platform and aerating gun platform are separately positioned on the described housing.
4. liquefied natural gas aerating machine as claimed in claim 2 is characterized in that, also is connected with boiler check valve and compression indicator in turn on the described return line between return-air mouth and return-air rifle interface.
5. liquefied natural gas aerating machine as claimed in claim 4 is characterized in that, also is connected with second flow counter on the described return line between boiler check valve and compression indicator.
6. liquefied natural gas aerating machine as claimed in claim 4 is characterized in that, also is connected with liquid sensor on the described return line between compression indicator and return-air rifle interface.
7. the aerating method of a liquefied natural gas comprises
Form a plurality of pipelines, comprise
Form return line, it has successively by metallic hose bonded assembly return-air mouth, return-air rifle interface and return-air rifle;
Form the aerating pipeline, it has successively by metallic hose bonded assembly inlet, first flow meter, pneumatic valve, air filling gun interface and air filling gun; With
Form connecting line, it has by metallic hose bonded assembly return-air gun platform and aerating gun platform;
Connect described return line with gas station and be connected described aerating pipeline and gas station;
By liquid feeding in the gas-adding pipe road direction vehicle-mounted bottle, simultaneously by return line with the boil-off gas return-air in the vehicle-mounted bottle to gas station.
8. aerating method as claimed in claim 7 is characterized in that, also comprises being communicated with described return-air rifle and described return-air gun platform before liquid feeding and return-air step, and is communicated with described air filling gun and described aerating gun platform; And a plurality of pipelines of precooling connection.
9. aerating method as claimed in claim 8 is characterized in that, described precooling step comprises that opening described pneumatic valve flows liquefied natural gas in a plurality of pipelines of described connection.
10. aerating method as claimed in claim 9 is characterized in that, described return line also is provided with liquid sensor and closes described pneumatic valve to judge and to send the precooling end signal.
11. aerating method as claimed in claim 10 is characterized in that, is disposed with boiler check valve, second flow counter, compression indicator between described return line gas port last time and the liquid sensor.
12. aerating method as claimed in claim 11 is characterized in that, comprises that also the numerical value in the first flow metering deducts the numerical value of second flow counter metering as the clearing foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100117701A CN101058400B (en) | 2006-04-21 | 2006-04-21 | Liquefied natural gas aerating machine and aerating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100117701A CN101058400B (en) | 2006-04-21 | 2006-04-21 | Liquefied natural gas aerating machine and aerating method |
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| Publication Number | Publication Date |
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| CN101058400A CN101058400A (en) | 2007-10-24 |
| CN101058400B true CN101058400B (en) | 2011-11-23 |
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| CN2006100117701A Expired - Fee Related CN101058400B (en) | 2006-04-21 | 2006-04-21 | Liquefied natural gas aerating machine and aerating method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509599A (en) * | 2009-03-31 | 2009-08-19 | 沈军 | Secondary gas filling station |
| CN102032439A (en) * | 2009-09-28 | 2011-04-27 | 张家港圣汇气体化工装备有限公司 | Suspension device for liquefied natural gas filling gun |
| CN102182916A (en) * | 2011-02-11 | 2011-09-14 | 张家港富瑞特种装备股份有限公司 | Liquefied natural gas filling machine |
| CN102705700A (en) * | 2012-05-31 | 2012-10-03 | 天津华迈燃气装备股份有限公司 | Liquid filler for liquefied natural gas vehicle |
| CN104390078A (en) * | 2014-11-04 | 2015-03-04 | 无锡市华明化工有限公司 | Gas conveying hose in chemical industry |
| CN108591820A (en) * | 2018-04-28 | 2018-09-28 | 杰瑞石油天然气工程有限公司 | A method of prevent LNG filling machines from stealing gas by pressure sensor |
| CN110748791A (en) * | 2019-10-17 | 2020-02-04 | 深圳中集智能科技有限公司 | Control method of LNG filling equipment, filling process and filling equipment |
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| US5549142A (en) * | 1994-05-27 | 1996-08-27 | Jeffrey P. Beale | Dispensing system for refueling transport containers with cryogenic liquids |
| US5884488A (en) * | 1997-11-07 | 1999-03-23 | Westport Research Inc. | High pressure fuel supply system for natural gas vehicles |
| CN2558841Y (en) * | 2002-07-24 | 2003-07-02 | 北京长空机械有限责任公司 | Liquefied petroleum gas filling machine |
| CN2677729Y (en) * | 2004-02-09 | 2005-02-09 | 北京长空机械有限责任公司 | Machine for filling liquified natural gas |
| CN2905757Y (en) * | 2006-04-21 | 2007-05-30 | 中国国际海运集装箱(集团)股份有限公司 | Liquefied petroleum gas supplying device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549142A (en) * | 1994-05-27 | 1996-08-27 | Jeffrey P. Beale | Dispensing system for refueling transport containers with cryogenic liquids |
| US5884488A (en) * | 1997-11-07 | 1999-03-23 | Westport Research Inc. | High pressure fuel supply system for natural gas vehicles |
| CN2558841Y (en) * | 2002-07-24 | 2003-07-02 | 北京长空机械有限责任公司 | Liquefied petroleum gas filling machine |
| CN2677729Y (en) * | 2004-02-09 | 2005-02-09 | 北京长空机械有限责任公司 | Machine for filling liquified natural gas |
| CN2905757Y (en) * | 2006-04-21 | 2007-05-30 | 中国国际海运集装箱(集团)股份有限公司 | Liquefied petroleum gas supplying device |
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| CN101058400A (en) | 2007-10-24 |
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Granted publication date: 20111123 Termination date: 20180421 |