CN103307444A - Liquefied natural gas (LNG) dispenser with high precision of metering - Google Patents
Liquefied natural gas (LNG) dispenser with high precision of metering Download PDFInfo
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- CN103307444A CN103307444A CN2013102457159A CN201310245715A CN103307444A CN 103307444 A CN103307444 A CN 103307444A CN 2013102457159 A CN2013102457159 A CN 2013102457159A CN 201310245715 A CN201310245715 A CN 201310245715A CN 103307444 A CN103307444 A CN 103307444A
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Abstract
The invention discloses a liquefied natural gas (LNG) dispenser with high precision of metering, which belongs to the technical field of LNG. The LNG dispenser with high precision of metering comprises a liquid feeding pipeline for communicating a feeding nozzle to a liquid inlet, and a circulation pipeline for communicating a gas returning port to the liquid feeding pipeline, wherein a liquid feeding flowmeter is arranged on the liquid feeding pipeline, is positioned between an interface of the circulation pipeline and the feeding nozzle and is required to be arranged behind the interface of the circulation pipeline, and a bypass pipeline is not arranged behind the liquid feeding flowmeter. The LNG dispenser with high precision of metering ensures that LNG gas metered by the liquid feeding flowmeter is totally fed into an automobile steel bottle instead of flowing away from a bypass, and thus the accuracy of metering of the LNG dispenser is guaranteed.
Description
Technical field
The present invention relates to a kind of filling machine equipment of LNG technology, particularly a kind of LNG.
Background technique
LNG is LNG Liquefied natural gas, is rock gas through after purifying, and heats up by compression, and under the effect of mix refrigerant, heat is removed in cooling, and throttling expansion obtains again, temperature under the normal pressure-162 ℃; Because LNG is the product of rock gas cooling liquid under the ultralow temperature state, thus it be heated after very easily gasification.
Along with extensive use and the develop rapidly of LNG technology in China, the technology of LNG filling machine and application are also at high speed development, and the market demand is increasing, and is more and more higher to the requirement of LNG filling machine.If traditional LNG filling machine valve P2 leaks, part LNG liquid can flow back to storage tank by valve P2, and this part flows back to the LNG liquid of storage tank by liquid feeding flowmeter F1 metering, measure inaccurate problem in the time of will occurring like this to the automobile liquid feeding, this problem the Long-term Effect the development of LNG filling machine, and become the technical bottleneck of LNG filling machine, can solve problems without manufacturer in the LNG industry at present, the whole industry all adopts outmoded LNG filling machine equipment, all exists the LNG filling machine to measure inaccurate problem.So this design has solved the technical barrier that is being stranded the LNG filling machine always, broken through the technical bottleneck of industry, guaranteed the gas filling accuracy of LNG filling machine fully, belong to innovative design.
Employed flowmeter on the LNG filling machine, can not carry out accurate-metering to gas-liquid mixed media, for the liquid feeding measurement accuracy, to fully guarantee in the pipeline it all is the LNG liquid medium during metering of LNG filling machine liquid feeding, so necessary precooling pipeline before the LNG filling machine liquid feeding, by precooling, be liquid with the gas cooling in the pipeline, make the flowmeter can accurate-metering.
Summary of the invention
Goal of the invention of the present invention is: for the problem of above-mentioned existence, a kind of LNG filling machine of high-precision measuring is provided, the technical problem that mainly solves is: the LNG liquid by the metering of the first liquid feeding flowmeter when 1, how to guarantee liquid feeding all enters the automobile steel cylinder, the second valve leak on the circulation road can not exerted an influence to measurement accuracy, thereby improve the measuring accuracy of filling machine, guarantee LNG filling machine liquid feeding measurement accuracy; 2, how to judge by the pipeline temperature whether system reaches the condition of liquid feeding.
The technical solution used in the present invention is as follows:
The LNG filling machine of high-precision measuring of the present invention, comprise the filling muzzle is communicated with the liquid feeding pipeline of liquid entering hole and gas returning port is communicated with circulation loop on the liquid feeding pipeline, wherein the liquid feeding pipeline is provided with the liquid feeding flowmeter, described liquid feeding flowmeter is between circulation loop interface and filling muzzle, on the pipeline that makes that the liquid feeding flowmeter is positioned at after the circulation loop interface all the time, connects before the filling muzzle, and the liquid feeding flowmeter with annotate between the muzzle without any bypass line.
Owing to having adopted said structure, wherein the liquid feeding flowmeter is on the liquid feeding pipeline between circulation loop interface and the filling muzzle, so that the liquid feeding flowmeter to annotate between the muzzle without any bypass line, assurance can not flow away from bypass by the LNG liquid of liquid feeding flowmeter metering, but all add the automobile steel cylinder, guaranteed LNG filling machine measurement accuracy, so that technological scheme of the present invention has solved a technical difficult problem that is perplexing the LNG industry always.Because the LNG industry belongs to emerging industry in China, the domestic technique slower development, when absorbing foreign technology, limitation and the impact of foreign technology also have been subject to, the present invention is at the beginning of design, being subject to the consistent of domestic and international technical expert negates, and insist that all original design is only optimal case, and prophesy the present invention can't reach the effect of accurate measurement; Those skilled in the art are under this background, adhere to having confirmed by many experiments the feasibility of technological scheme of the present invention, improved the measuring accuracy of filling machine, guarantee LNG filling machine liquid feeding measurement accuracy, this scheme obviously is better than the scheme of prior art, broken those skilled in the art's technology prejudice, concerning the accurate measurement of LNG filling machine, it is beyond example breakthrough, break LNG filling machine industry and measured not accurately situation, led the beginning of LNG filling machine industry technology, the development of LNG filling machine has been had profound significance; Can prevent also that simultaneously the people from opening the gas behavior of stealing that by-pass valve carries out; The present invention comes the signal piping temperature whether to reach the liquid feeding condition by liquid feeding flowmeter (mass flowmenter) is set at the liquid feeding pipeline, when detected pipeline temperature reaches the liquid feeding condition, circulation precooling EOP end of program, enter the aerating program, thereby can judge whether system reaches the condition of liquid feeding by the detected pipeline temperature of the liquid feeding flowmeter on the liquid feeding pipeline.
The LNG filling machine of high-precision measuring of the present invention, the liquid feeding pipeline upper in the liquid feeding flowmeter and the filling muzzle between and circulation loop be equipped with Emergeny Cutoff Valves; Wherein the upper one-way valve that is parallel with on Emergeny Cutoff Valves of liquid feeding pipeline guarantees that the liquid that liquid feeding stops in the rear pipeline can be back to storage tank smoothly, guarantees that the liquid that liquid feeding stops in the rear pipeline can be back to storage tank smoothly.
The LNG filling machine of high-precision measuring of the present invention, between the Emergeny Cutoff Valves and liquid return hole on the described circulation loop, be connected on return-air muzzle and the slotting gun platform mouth by two pipelines respectively, the pipeline that wherein is connected in the return-air muzzle is provided with return-air flowmeter and one-way valve, wherein is connected in the pipeline of inserting the gun platform mouth and is provided with one-way valve.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
1, the LNG filling machine of high-precision measuring of the present invention is simple in structure, easy and simple to handle, easy to use, with low cost, is fit to apply;
2, the LNG filling machine of high-precision measuring of the present invention guarantees can not flow away from bypass by the LNG liquid of liquid feeding flowmeter metering, but all adds the automobile steel cylinder, has guaranteed LNG filling machine measurement accuracy;
3, the LNG filling machine of high-precision measuring of the present invention can be by the liquid feeding flowmeter on the liquid feeding pipeline, and detected pipeline temperature judges whether system reaches the condition of liquid feeding.
Description of drawings
Fig. 1 is the structural representation during the second valve leak among the present invention;
Fig. 2 is the structural representation of the present invention when using;
Fig. 3 is liquid filler test report table of the present invention.
Mark among the figure: J-liquid entering hole, H-liquid return hole, P1-the first valve, P2-the second valve, F1-the first liquid feeding flowmeter, F2-return-air flowmeter, V1-the first one-way valve, V2-the second one-way valve, V3-the 3rd one-way valve, Q1-filling muzzle, Q2-return-air muzzle, Q3-insert the gun platform mouth.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make purpose of the present invention, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As depicted in figs. 1 and 2, the LNG filling machine of high-precision measuring of the present invention, comprise the liquid feeding pipeline that filling muzzle Q1 is communicated with liquid entering hole J, and with the circulation loop on the gas returning port H connection liquid feeding pipeline, wherein the liquid feeding pipeline is provided with the first liquid feeding flowmeter F1 and the first valve P1, described the first liquid feeding flowmeter F1 and the first valve P1 are between circulation loop interface and filling muzzle Q1, liquid feeding flowmeter F1 must be in the back of circulation loop interface, and liquid feeding flowmeter F1 back does not have bypass line, be equipped with the second valve P2 at described circulation loop, the upper first one-way valve V1 that on Emergeny Cutoff Valves, is parallel with of liquid feeding pipeline wherein, between the second valve P2 and gas returning port H on the described circulation loop, be connected on return-air muzzle Q2 and the slotting gun platform mouth Q3 by two pipelines respectively, the pipeline that wherein is connected in return-air muzzle Q2 is provided with return-air flowmeter F2 and the second one-way valve V2, wherein is connected in the pipeline of inserting gun platform mouth Q3 and is provided with the 3rd one-way valve V3.
The LNG filling machine of high-precision measuring of the present invention comprises following use part:
The circulation precooling
The LNG filling machine of high-precision measuring of the present invention when precooling, is opened the second valve P2 of circulation loop, and the first valve P1 closes, and LNG carries out pipeline circulation precooling to the filling machine gas returning port from the filling machine liquid entering hole again through the second valve P2.Simultaneously, the first mass flowmenter F1 on the liquid feeding road detects automatically to the pipeline temperature, and when detected pipeline temperature reached the liquid feeding condition, circulation precooling EOP end of program entered the aerating program.
Aerating
During operation aerating program, the second valve P2 of pipeline closes, and the first valve P1 opens, and LNG is filled in the automobile steel cylinder and goes by liquid filler liquid entering hole, the first mass flowmenter F1 and the first valve P1, filling muzzle Q1.
The LNG filling machine of high-precision measuring of the present invention, the first liquid feeding flowmeter F1 back of LNG filling machine does not have bypass line, LNG liquid by the first liquid feeding flowmeter F1 metering during liquid feeding all enters the automobile steel cylinder, the second valve P2 on the circulation loop leaks and can not exert an influence to measurement accuracy, has so just improved the measuring accuracy of LNG filling machine; Simultaneously prevented that also the people from being the behavior that the second valve P2 steals gas of opening, guaranteed LNG filling machine liquid feeding measurement accuracy.
Judge by the detected pipeline temperature of the first liquid feeding flowmeter F1 on the liquid feeding pipeline whether system reaches the condition of liquid feeding, thereby further improve measuring accuracy.
The liquid filler test report table of Fig. 3 as can be known, through 7 groups of feasibilities of technological scheme of the present invention that amounted to 21 experiment confirms, switched to the measuring accuracy of filling machine, guarantee LNG filling machine liquid feeding measurement accuracy, this scheme obviously is better than the scheme of prior art, has broken those skilled in the art's technology prejudice.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the LNG filling machine of a high-precision measuring, it comprises with the liquid feeding pipeline of filling muzzle (Q1) connection liquid entering hole (J) and with the circulation loop on gas returning port (H) the connection liquid feeding pipeline, it is characterized in that: wherein the liquid feeding pipeline is provided with the liquid feeding flowmeter, described liquid feeding flowmeter is positioned between circulation loop interface and the filling muzzle (Q1), and the liquid feeding flowmeter is positioned on the latter linked pipeline of circulation loop interface all the time.
2. the LNG filling machine of high-precision measuring as claimed in claim 1 is characterized in that: the liquid feeding pipeline upper between liquid feeding flowmeter and filling muzzle (Q1) and circulation loop be equipped with Emergeny Cutoff Valves; The upper one-way valve that on Emergeny Cutoff Valves, is parallel with of liquid feeding pipeline wherein.
3. the LNG filling machine of high-precision measuring as claimed in claim 2, it is characterized in that: between the Emergeny Cutoff Valves on the described circulation loop and the gas returning port (H), be connected on return-air muzzle (Q2) and the slotting gun platform mouth (Q3) by two pipelines respectively, the pipeline that wherein is connected in return-air muzzle (Q2) is provided with return-air flowmeter and one-way valve, wherein is connected in the pipeline of inserting gun platform mouth (Q3) and is provided with one-way valve.
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| CN2013102457159A CN103307444A (en) | 2013-06-20 | 2013-06-20 | Liquefied natural gas (LNG) dispenser with high precision of metering |
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| CN2013102457159A CN103307444A (en) | 2013-06-20 | 2013-06-20 | Liquefied natural gas (LNG) dispenser with high precision of metering |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629525A (en) * | 2013-12-03 | 2014-03-12 | 重庆耐德能源装备集成有限公司 | Intelligent high-precision LNG filling metering device |
| CN103982776A (en) * | 2014-06-06 | 2014-08-13 | 成都华气厚普机电设备股份有限公司 | LNG dispenser pipeline structure and control system thereof |
| CN104315332A (en) * | 2014-10-09 | 2015-01-28 | 江苏大学 | Precise metering device for filling liquefied natural gas |
| CN104359002A (en) * | 2014-09-30 | 2015-02-18 | 无锡特汇能源装备有限公司 | LNG dispenser |
| CN104456065A (en) * | 2014-12-08 | 2015-03-25 | 日照海达尔加气设备有限公司 | Liquefied natural gas filling machine with low-temperature compression device and liquefied natural gas filling method |
| CN105020579A (en) * | 2015-08-05 | 2015-11-04 | 陕西瑞科特种设备技术有限公司 | Single-flow double-metering liquefied natural gas filling machine |
| CN105605416A (en) * | 2015-12-25 | 2016-05-25 | 江苏现代造船技术有限公司 | Marine liquefied natural gas (LNG) filling machine |
| CN109165880A (en) * | 2018-10-30 | 2019-01-08 | 青岛科技大学 | A kind of LNG receiving station accident emergency drilling simulation system and analogy method |
| CN117386998A (en) * | 2023-12-11 | 2024-01-12 | 厚普智慧物联科技有限公司 | Pipe section gas quality metering method and metering device |
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| CN203404599U (en) * | 2013-06-20 | 2014-01-22 | 成都华气厚普机电设备股份有限公司 | High-precision metering LNG (Liquefied Natural Gas) gas dispenser |
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| US5582218A (en) * | 1994-05-27 | 1996-12-10 | Jeffrey P. Beale | Dispensing system for refueling transport containers with cryogenic liquids |
| 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 |
| CN200968493Y (en) * | 2006-08-28 | 2007-10-31 | 重庆四联加油机器制造有限公司 | Double-tube type air feedback metering LNG inflating apparatus |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629525A (en) * | 2013-12-03 | 2014-03-12 | 重庆耐德能源装备集成有限公司 | Intelligent high-precision LNG filling metering device |
| CN103982776A (en) * | 2014-06-06 | 2014-08-13 | 成都华气厚普机电设备股份有限公司 | LNG dispenser pipeline structure and control system thereof |
| CN104359002A (en) * | 2014-09-30 | 2015-02-18 | 无锡特汇能源装备有限公司 | LNG dispenser |
| CN104315332A (en) * | 2014-10-09 | 2015-01-28 | 江苏大学 | Precise metering device for filling liquefied natural gas |
| CN104315332B (en) * | 2014-10-09 | 2016-09-14 | 江苏大学 | A kind of liquified natural gas aerating accurate measuring device |
| CN104456065A (en) * | 2014-12-08 | 2015-03-25 | 日照海达尔加气设备有限公司 | Liquefied natural gas filling machine with low-temperature compression device and liquefied natural gas filling method |
| CN104456065B (en) * | 2014-12-08 | 2016-04-27 | 日照海达尔加气设备有限公司 | A kind of liquefied natural gas aerating machine with low temperature compression device and aerating method |
| CN105020579A (en) * | 2015-08-05 | 2015-11-04 | 陕西瑞科特种设备技术有限公司 | Single-flow double-metering liquefied natural gas filling machine |
| CN105605416A (en) * | 2015-12-25 | 2016-05-25 | 江苏现代造船技术有限公司 | Marine liquefied natural gas (LNG) filling machine |
| CN105605416B (en) * | 2015-12-25 | 2018-07-24 | 江苏现代造船技术有限公司 | A kind of LNG charging machines peculiar to vessel |
| CN109165880A (en) * | 2018-10-30 | 2019-01-08 | 青岛科技大学 | A kind of LNG receiving station accident emergency drilling simulation system and analogy method |
| CN117386998A (en) * | 2023-12-11 | 2024-01-12 | 厚普智慧物联科技有限公司 | Pipe section gas quality metering method and metering device |
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Application publication date: 20130918 |