CN103629525A - Intelligent high-precision LNG filling metering device - Google Patents
Intelligent high-precision LNG filling metering device Download PDFInfo
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- CN103629525A CN103629525A CN201310651328.5A CN201310651328A CN103629525A CN 103629525 A CN103629525 A CN 103629525A CN 201310651328 A CN201310651328 A CN 201310651328A CN 103629525 A CN103629525 A CN 103629525A
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Abstract
The invention discloses an intelligent high-precision LNG filling metering device. A liquid feeding pipeline is connected to a liquid feeding gun (9) from a liquid inlet (1) through a liquid phase mass flowmeter (2); two branches are connected to the outlet end of the liquid phase mass flowmeter (2), wherein one branch is connected with the liquid feeding gun (9) and a circulating switch valve (4) is connected to the other branch; the inlet end of the circulating switch valve (4) is connected with the outlet end of the liquid phase mass flowmeter (2); the outlet end of the circulating switch valve (4) is connected to a circulation port (6); a gas phase mass flowmeter (7) is arranged on a pipeline between the circulating switch valve (4) and the circulation port (6). According to the invention, the gas phase mass flowmeter is additionally arranged on the pipeline between a first check valve and the circulation port, so that not only is the metering accuracy high, and the metering accuracy is not influenced by leakage of a circulating pneumatic valve, but also the intelligent degree is high, and the characteristic of preventing that people cheat or steal liquid can be achieved.
Description
Technical field
The present invention relates to the LNG filling measuring apparatus that a kind of precision is higher.
Background technique
LNG is exactly the abbreviation of LNG Liquefied natural gas, the natural gas purification processing of first gas field being produced, more just form LNG Liquefied natural gas through ultralow temperature to-162 ℃ of liquefaction, at present, LNG has been widely used in the every field of national economy, adopt LNG as motor car engine fuel, motor only needs to do suitable change, moves not only safe and reliable, and the low pollution of noise is little, particularly in today of Abgasgesetz increasingly stringent, using LNG as the automobile of fuel, exhaust obviously improves.And as also increasing to the demand of the filling machine of LNG refueling and gas station, also more and more higher to the requirement of LNG filling machine.Traditional LNG filling machine between mass flowmenter and circulation port, be provided with cycling switch valve, if in liquid feeding process, this cycling switch valve leaks, part LNG liquid can be back to storage tank from cycling switch valve along circulation port, and this part LNG liquid has flow through from mass flowmenter, therefore passed through the metering of liquid phase mass flowmenter, the not high problem of measuring accuracy when there will be liquid feeding.Simultaneously, when liquid feeding rifle quits work while being inserted in liquid feeding gun platform, LNG can be from liquid entering hole flow through successively liquid phase mass flowmenter, liquid feeding rifle, liquid feeding gun platform, finally by circulation port, get back in storage tank, in inferior process, liquid phase mass flowmenter is used for detecting the important parameters such as temperature that LNG circulates, density, flow, but can not measure integrated flow, if now there is people that liquid feeding rifle is connected in filled container, just can reach the object that liquid is stolen in cheating.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of measuring accuracy better intelligent LNG filling apparatus.
Technological scheme of the present invention is as follows: the high-precision LNG filling of a kind of intelligence measuring apparatus, comprise liquid feeding pipeline, described liquid feeding pipeline comprises from liquid entering hole (1) and is connected to liquid feeding rifle (9) by liquid phase mass flowmenter (2), the outlet end of this liquid phase mass flowmenter (2) is connected with two branch roads, wherein a branch road is connected with liquid feeding rifle (9), another branch road is connected with short circle precooling pipeline, this short circle precooling pipeline comprises cycling switch valve (4), the entry end of this cycling switch valve (4) is connected with the outlet end of liquid phase mass flowmenter (2), and the outlet end of this cycling switch valve (4) is connected to circulation port (6), it is characterized in that: on the pipeline between described cycling switch valve (4) and circulation port (6), be provided with gas phase mass flow meter (7).
The LNG filling measuring apparatus that adopts said structure, when liquid feeding, LNG, is filled into and is filled in container by liquid feeding rifle from liquid entering hole after the metering of liquid phase mass flowmenter.If cycling switch valve leaks in filling process, LNG in filling to when being filled container, through cycling switch valve and gas phase mass flowmenter, return to station with in storage tank, the variable that the final variable of filling apparatus deducts gas phase mass flow meter by the variable of liquid phase mass flowmenter obtains, that is to say, the leakage of cycling switch valve can not affect the accuracy of measuring of filling apparatus.
In order better filling process to be controlled, simultaneously in order to prevent that liquid from refluxing in cyclic process, on pipeline between described liquid phase mass flowmenter (2) and liquid feeding rifle (9), be provided with liquid feeding switch valve (3), on the pipeline between cycling switch valve (4) and gas phase mass flow meter (7), be connected with the first safety check (5).
The high-precision LNG filling of described a kind of intelligence measuring apparatus also comprises major cycle precooling pipeline, and this major cycle precooling pipeline comprises liquid feeding gun platform (8), and this liquid feeding gun platform (8) is connected to the entry end of the first safety check (5) through the second safety check (10).When liquid feeding rifle quits work while being inserted in liquid feeding gun platform, LNG can be from liquid entering hole flow through successively liquid phase mass flowmenter, liquid feeding rifle, liquid feeding gun platform and gas phase mass flowmenter, finally by circulation port, get back in storage tank, in this process, liquid phase mass flowmenter is used for detecting the important parameters such as temperature that LNG circulates, density, flow, but can not measure integrated flow, if now gas phase mass flow meter does not detect the relevant parameters such as temperature, density, flow, attachment means can stop major cycle precooling automatically, prevents the generation of liquid situation steathily of being practised fraud.
The high-precision LNG filling of described a kind of intelligence measuring apparatus also comprises return line, and this return line comprises return-air rifle (11), and this return-air rifle (11) is connected to the entry end of the first safety check (5) by the 3rd safety check (12).
Beneficial effect: the present invention has added gas phase mass flow meter on the pipeline between the first safety check and circulation port, not only the accuracy of measuring is high, circulation pneumatic valve leaks the not impact of the accuracy of measuring of filling, but also it is high to have degree of intelligence, can prevent the feature that artificially liquid is stolen in cheating.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes the parts such as liquid entering hole 1, liquid phase mass flowmenter 2, liquid feeding switch valve 3, cycling switch valve 4, the first safety check 5, circulation port 6, gas phase mass flow meter 7, liquid feeding gun platform 8, liquid rifle 9, the second safety check 10, return-air rifle 11 and the 3rd safety check 12, described liquid entering hole 1 is connected to liquid feeding rifle 9 by liquid phase mass flowmenter 2 and liquid feeding switch valve 3 successively, and this pipeline is liquid feeding pipeline.
As shown in Figure 1, because mass flowmenter can not carry out accurate-metering to gas-liquid mixed media, accuracy for liquid feeding metering, before the metering of LNG filling machine liquid feeding, to guarantee in pipeline it is all LNG liquid medium, therefore must precooling pipeline before liquid feeding, by precooling, by the gas cooling in pipeline, be liquid, the accuracy of the flowmeter of ensuring the quality of products metering.At this device, two circulation loops have been comprised, the outlet end of described liquid phase mass flowmenter 2 is connected with two branch roads, wherein a branch road is connected with the entry end of liquid feeding switch valve 3, another branch road is connected with short circle precooling pipeline, this short circle precooling pipeline comprises cycling switch valve 4, the entry end of this cycling switch valve 4 is connected with the outlet end of liquid phase mass flowmenter 2, and the outlet end of this cycling switch valve 4 connects the first safety check 5 successively and gas phase mass flowmenter 7 is finally connected to circulation port 6.This device also comprises major cycle precooling pipeline, and this major cycle precooling pipeline comprises liquid feeding gun platform 8, and this liquid feeding gun platform 8 is connected to the entry end of the first safety check 5 through the second safety check 10.
From Fig. 1 further, this device also comprises return line, and this return line comprises return-air rifle 11, and this return-air rifle 11 the 3rd safety check 12 is connected to the entry end of the first safety check 5.
The present embodiment working principle:
When liquid feeding rifle 9 quits work while being inserted in liquid feeding gun platform 8, LNG can be from the liquid entering hole 1 liquid phase mass flowmenter 2 of flowing through successively, liquid feeding switch valve 3, liquid feeding rifle 9, liquid feeding gun platform 8, the second safety check 10, the first safety check 5, gas phase mass flow meter 7, finally by circulation port 6, get back in storage tank, in this process, LNG liquid carries out major cycle precooling, liquid phase mass flowmenter is used for detecting the temperature that LNG circulates, density, the important parameters such as flow, but can not measure integrated flow, if now gas phase mass flow meter does not detect temperature, density, the relevant parameters such as flow, attachment means can stop major cycle precooling automatically, prevent the generation of liquid situation steathily of being practised fraud.
Before carrying out liquid feeding metrological operation, this device can detect the temperature of liquid phase mass flowmenter 2 feedbacks, density, the important parameters such as flow, the requirement filling if do not met liquid feeding, device can proceed to short circle precooling automatically, open cycling switch valve 4, close liquid feeding switch valve 3, LNG is from the liquid entering hole 1 liquid phase mass flowmenter 2 of flowing through successively, cycling switch valve 4, the first safety check 5 and gas phase mass flowmenter 7 are circulated to circulation port 6, temperature when liquid phase mass flowmenter 2 feedbacks, density, when the parameters such as flow meet liquid feeding requirement, device is closed cycling switch valve 4, open liquid feeding switch valve 3, be switched to and add liquid status.
When carrying out liquid feeding metrological operation, LNG, is filled into and is filled in container by liquid feeding switch valve 3 and liquid feeding rifle 9 successively from liquid entering hole 1 after 2 meterings of liquid phase mass flowmenter.If cycling switch valve 4 leaks in filling process, LNG in filling to when being filled container, through cycling switch valve 4 and gas phase mass flowmenter 7, return to station with in storage tank, the final variable of filling apparatus is that the variable of liquid phase mass flowmenter 2 is deducted to the numerical value after the variable of gas phase mass flow meter 7, has improved measuring accuracy.
The foregoing is only preferred embodiment of the present invention, not take the present invention as restriction, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the high-precision LNG filling of intelligence measuring apparatus, comprise liquid feeding pipeline, described liquid feeding pipeline comprises from liquid entering hole (1) and is connected to liquid feeding rifle (9) by liquid phase mass flowmenter (2), the outlet end of this liquid phase mass flowmenter (2) is connected with two branch roads, wherein a branch road is connected with liquid feeding rifle (9), another branch road is connected with short circle precooling pipeline, this short circle precooling pipeline comprises cycling switch valve (4), the entry end of this cycling switch valve (4) is connected with the outlet end of liquid phase mass flowmenter (2), and the outlet end of this cycling switch valve (4) is connected to circulation port (6), it is characterized in that: on the pipeline between described cycling switch valve (4) and circulation port (6), be provided with gas phase mass flow meter (7).
2. the high-precision LNG of intelligence according to claim 1 filling measuring apparatus, it is characterized in that: on the pipeline between described liquid phase mass flowmenter (2) and liquid feeding rifle (9), be provided with liquid feeding switch valve (3), on the pipeline between cycling switch valve (4) and gas phase mass flow meter (7), be connected with the first safety check (5).
3. the high-precision LNG of intelligence according to claim 2 filling measuring apparatus, it is characterized in that: the high-precision LNG filling of described a kind of intelligence measuring apparatus also comprises major cycle precooling pipeline, this major cycle precooling pipeline comprises liquid feeding gun platform (8), and this liquid feeding gun platform (8) is connected to the entry end of the first safety check (5) through the second safety check (10).
4. the high-precision LNG of intelligence according to claim 2 filling measuring apparatus, it is characterized in that: the high-precision LNG filling of described a kind of intelligence measuring apparatus also comprises return line, this return line comprises return-air rifle (11), and this return-air rifle (11) is connected to the entry end of the first safety check (5) by the 3rd safety check (12).
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| CN201310651328.5A CN103629525A (en) | 2013-12-03 | 2013-12-03 | Intelligent high-precision LNG filling metering device |
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| CN201310651328.5A CN103629525A (en) | 2013-12-03 | 2013-12-03 | Intelligent high-precision LNG filling metering device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315332A (en) * | 2014-10-09 | 2015-01-28 | 江苏大学 | Precise metering device for filling liquefied natural gas |
| CN104864261A (en) * | 2015-03-03 | 2015-08-26 | 东京计装（上海）仪表有限公司 | LNG filling measurement method with functions of self-pre-cooling and low temperature maintaining, and apparatus |
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| 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 |
| CN108799835A (en) * | 2018-05-19 | 2018-11-13 | 杰瑞石油天然气工程有限公司 | A kind of LNG rush-harvesting and rush-plantings filling machine pipe-line system |
| CN109630870A (en) * | 2017-10-09 | 2019-04-16 | 安瑞科(廊坊)能源装备集成有限公司 | Abnormal pre-cooling recognition methods, device and the LNG dispenser of LNG dispenser |
| CN109630878A (en) * | 2017-10-09 | 2019-04-16 | 安瑞科(廊坊)能源装备集成有限公司 | The precooling treatment method, apparatus and LNG dispenser of LNG dispenser |
| CN110345377A (en) * | 2019-07-12 | 2019-10-18 | 青岛乐戈新能源科技有限公司 | The system and method that flashed vapour discharges during a kind of reduction liquefied natural gas filling |
| CN113375055A (en) * | 2020-02-25 | 2021-09-10 | Kc股份有限公司 | Gas supply system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104315332A (en) * | 2014-10-09 | 2015-01-28 | 江苏大学 | Precise metering device for filling liquefied natural gas |
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| CN104864261A (en) * | 2015-03-03 | 2015-08-26 | 东京计装（上海）仪表有限公司 | LNG filling measurement method with functions of self-pre-cooling and low temperature maintaining, and apparatus |
| CN105116865A (en) * | 2015-09-09 | 2015-12-02 | 江苏德邦工程有限公司 | LNG (liquefied natural gas) filling station optimization control system |
| CN109630870A (en) * | 2017-10-09 | 2019-04-16 | 安瑞科(廊坊)能源装备集成有限公司 | Abnormal pre-cooling recognition methods, device and the LNG dispenser of LNG dispenser |
| CN109630878A (en) * | 2017-10-09 | 2019-04-16 | 安瑞科(廊坊)能源装备集成有限公司 | The precooling treatment method, apparatus and LNG dispenser of LNG dispenser |
| CN109630878B (en) * | 2017-10-09 | 2022-03-08 | 安瑞科(廊坊)能源装备集成有限公司 | Precooling treatment method and device for LNG (liquefied Natural gas) dispenser and LNG dispenser |
| 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 |
| CN108799835A (en) * | 2018-05-19 | 2018-11-13 | 杰瑞石油天然气工程有限公司 | A kind of LNG rush-harvesting and rush-plantings filling machine pipe-line system |
| CN110345377A (en) * | 2019-07-12 | 2019-10-18 | 青岛乐戈新能源科技有限公司 | The system and method that flashed vapour discharges during a kind of reduction liquefied natural gas filling |
| CN113375055A (en) * | 2020-02-25 | 2021-09-10 | Kc股份有限公司 | Gas supply system |
| CN113375055B (en) * | 2020-02-25 | 2023-08-04 | Kc股份有限公司 | Gas supply system |
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Application publication date: 20140312 |