CN204829278U - Liquefied natural gas of two measurements of single current volume adds mechanism of qi - Google Patents

Liquefied natural gas of two measurements of single current volume adds mechanism of qi Download PDF

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Publication number
CN204829278U
CN204829278U CN201520584481.5U CN201520584481U CN204829278U CN 204829278 U CN204829278 U CN 204829278U CN 201520584481 U CN201520584481 U CN 201520584481U CN 204829278 U CN204829278 U CN 204829278U
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China
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pipeline
return
air
natural gas
filling
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王耀武
杜利霞
臧小舟
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Special Equipment Technology Co Ltd Of Auspicious Section In Shaanxi
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Special Equipment Technology Co Ltd Of Auspicious Section In Shaanxi
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Abstract

The utility model discloses a liquefied natural gas of two measurements of single current volume adds mechanism of qi, which comprises a housin, the casing in be provided with reflux pipeline, return -air pipeline, circulation precooling pipeline and filling pipeline, reflux pipeline is through circulation precooling pipeline connection to filling on the pipeline, the last return -air pipeline that is connected with of reflux pipeline, and check valve one end links to each other with circulation precooling pipeline through temperature sensor, on the other end is connected to the filling pipeline, the muffler solenoid draw together and detect metering device, check valve and return -air rifle with mechanism of qi backward flow mouthful, return -air, the return -air detects metering device one end has a return -air rifle through the pipe connection behind the check valve, the other end has with mechanism of qi backward flow mouthful through the pipe connection. Should add the mechanism of qi owing to have only a liquid feeding pipeline, not have the branch again, not have the possibility that the air entrainment was practised fraud to to use one set of return -air to detect metering device and replace mass flow meter, guarantee a whole set of measuring accuracy who adds the mechanism of qi, and solve liquefied natural gas and added the big problem of mechanism of qi return -air metering error, also the cost is reduced.

Description

The liquefied natural gas aerating machine of the two metering of a kind of single current amount
Technical field
The utility model belongs to liquefied natural gas filling applied technical field, relates to the liquefied natural gas aerating machine of the two metering of a kind of single current amount.
Background technique
LNG Liquefied natural gas (LiquefiedNaturalGas, be called for short LNG) be a kind of clean, efficient energy, along with the development of China's LNGV (liquefied natural gas vehicle) industry, to the demand of liquefied natural gas filling station also in continuous increase, liquefied natural gas aerating machine is used widely day by day.
The state of overpressure is in use there will be at present because Domestic market existing vehicle-mounted bottle, for ease of filling LNG Liquefied natural gas, domestic liquefied natural gas aerating machine generally adopts two mass flowmenters, measures respectively to vehicle-mounted bottle liquid feeding and vehicle-mounted bottle decompression return-air.Still cannot accurate-metering return-air amount even if the characteristic due to the gas-liquid two-phase of LNG Liquefied natural gas determines service property (quality) flowmeter, and the cost of a mass flowmenter is higher.
Secondly, for the metering of vehicle-mounted bottle decompression return-air, because mass flowmenter requires higher to gas phase media measuring condition, during vehicle-mounted bottle return-air, medium situation is complicated, and therefore measuring accuracy is lower.Therefore research and develop and a kind ofly do not carry out return-air metering by the form of mass flowmenter and become the active demand in current liquefied natural gas aerating machine market.
Again, liquefied natural gas aerating machine domestic is at present the measuring accuracy of filling machine when realizing the inspection of metering prison, and adds branch after main meter, can give the chance providing cheating during aerating like this.
Model utility content
The utility model, in order to solve the problems of the technologies described above, provide the liquefied natural gas aerating machine of the two metering of low, the branchiess single current amount of a kind of cost, ensure that return-air measuring accuracy, meet filling machine usage requirement.
The utility model is achieved through the following technical solutions:
A liquefied natural gas aerating machine for the two metering of single current amount, comprises housing, is provided with reflux pipeline, vapor return line, circulating precooling pipeline and filling pipeline in described housing; Reflux pipeline is connected on filling pipeline by circulating precooling pipeline, reflux pipeline is connected with vapor return line, safety check one end is connected with circulating precooling pipeline through temperature transducer, the other end is connected on filling pipeline, described vapor return line comprises filling machine refluxing opening, return-air detects measuring apparatus, safety check and return-air rifle, return-air detects measuring apparatus one end and be connected with return-air rifle by pipeline after safety check, and the other end is connected with filling machine refluxing opening by pipeline.
Described filling pipeline comprises the filling machine liquid entering hole, pneumatic emergency cutting ball valve, mass flowmenter and the liquid feeding rifle that are connected in turn by pipe-line system, reflux pipeline is connected between mechanism of qi liquid entering hole and pneumatic emergency cut-off ball valve by circulating precooling pipeline, safety check one end is connected with circulating precooling pipeline through temperature transducer, and the other end is connected between pneumatic emergency cutting ball valve and mass flowmenter.
Described reflux pipeline comprises filling machine refluxing opening, safety check and is fixed on the liquid feeding gun platform of housing, filling machine refluxing opening is connected with safety check by pipeline, safety check is connected with liquid feeding gun platform, circulating precooling pipeline one end is connected between mechanism of qi liquid entering hole and pneumatic emergency cut-off ball valve, and one end is connected between filling machine refluxing opening and safety check.
Circulating precooling pipeline comprises pneumatic emergency cutting ball valve and pipeline, and pneumatic emergency cutting ball valve one end is connected between mechanism of qi liquid entering hole and pneumatic emergency cut-off ball valve by pipeline, and the other end is connected between filling machine refluxing opening and safety check by pipeline.
Housing upper is also provided with electric control unit, and the pneumatic emergency cutting ball valve of circulating precooling pipeline and the pneumatic emergency cutting ball valve of filling pipeline are all connected on electric control unit by solenoid valve.
Return-air observing and controlling measuring apparatus comprises the multiple measuring instruments for gathering return-air state.
Safety valve is connected with between filling machine liquid entering hole and pneumatic emergency cut-off ball valve.
The pipeline being connected with temperature transducer is also connected with pressure gauge and pressure transducer.
Compared with prior art, the utility model has following useful technique effect:
The liquefied natural gas aerating machine of the two metering of the single current amount that the utility model provides, specifically a kind of equipment for carrying out annotating to LNGV (liquefied natural gas vehicle), by only having a liquid feeding pipeline after main meter, again without branch, there is not the possibility of aerating cheating, simultaneously, for meeting the usage requirement of domestic liquefied natural gas filling station, the utility model will be used for the mass flowmenter of vehicle-mounted bottle decompression return-air metering, detect measuring apparatus with a set of return-air to replace, ensure that the measuring accuracy of a whole set of filling machine meets measuring accuracy requirement, solve the problem that liquefied natural gas aerating machine return-air error in dipping is large, this filling machine is made to have the function of measuring to the metering of vehicle-mounted bottle liquid feeding and vehicle-mounted bottle decompression return-air.Meanwhile, owing to eliminating mass flowmenter, make the internal structure of liquefied natural gas aerating machine more reasonable, significantly reduce the manufacture cost of liquefied natural gas aerating machine.
Accompanying drawing explanation
The liquefied natural gas aerating machine structural representation of the two metering of single current amount that Fig. 1 provides for the utility model.
Wherein: 1 is filling machine liquid entering hole; 2 is safety check; 3 is pneumatic emergency cutting ball valve; 4 is filling machine refluxing opening; 5 is return-air detection measuring apparatus; 6 is safety check; 7 is liquid feeding gun platform; 8 is return-air rifle; 9 is safety check; 10 is liquid feeding rifle; 11 is mass flowmenter; 12 is pneumatic emergency cutting ball valve; 13 is pipe-line system; 14 is safety valve; 15 is pressure gauge; 16 is pressure transducer; 17 is temperature transducer; 18 is housing; 19 is electric control unit; 20 is solenoid valve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1, the liquefied natural gas aerating machine of the two metering of a kind of single current amount, comprises housing 18, is provided with reflux pipeline, vapor return line, circulating precooling pipeline and filling pipeline in described housing 18, filling pipeline comprises the filling machine liquid entering hole 1 connected in turn by pipe-line system 13, pneumatic emergency cutting ball valve 12, mass flowmenter 11 and liquid feeding rifle 10, reflux pipeline is connected between mechanism of qi liquid entering hole 1 and pneumatic emergency cut-off ball valve 12 by circulating precooling pipeline, reflux pipeline is connected with vapor return line, safety check 2 one end is connected with circulating precooling pipeline through temperature transducer 17, one end is connected between pneumatic emergency cutting ball valve 12 and mass flowmenter 11, safety valve 14 is connected with between filling machine liquid entering hole 1 and pneumatic emergency cut-off ball valve 12, the pipeline being connected with temperature transducer 17 is also connected with pressure gauge 15 and pressure transducer 16.
Concrete, described reflux pipeline comprises filling machine refluxing opening 4, safety check 6 and is fixed on the liquid feeding gun platform 7 of housing, circulating precooling pipeline comprises pneumatic emergency cutting ball valve 3 and pipeline, filling machine refluxing opening 4 is connected with safety check 6 by pipeline, safety check 6 is connected with liquid feeding gun platform 7, pneumatic emergency cutting ball valve 3 one end is connected between mechanism of qi liquid entering hole 1 and pneumatic emergency cut-off ball valve 12 by pipeline, and the other end is connected between filling machine refluxing opening 4 and safety check 6 by pipeline.Described vapor return line comprises filling machine refluxing opening 4, return-air detects measuring apparatus 5, safety check 9 and return-air rifle 8, return-air detects measuring apparatus 5 one end and be connected with return-air rifle 8 by pipeline after safety check 9, and the other end is connected with filling machine refluxing opening 4 by pipeline.Wherein, return-air observing and controlling measuring apparatus 5 comprises the multiple measuring instruments for gathering return-air state.
In addition, housing upper is also provided with electric control unit 19, the pneumatic emergency cutting ball valve 3 of circulating precooling pipeline and the pneumatic emergency cutting ball valve 12 of filling pipeline are all connected on electric control unit 19 by explosion-proof solenoid valve 20, control it open and close by the opening and closing of the solenoid valve 20 being connected to electric control unit 19.
Further, this filling machine can realize two kinds of return-air forms: the return-air of annotating in front return-air separately and filling process.Concrete, user can judge it is return-air in return-air or filling process before filling according to the pressure of the vehicle-mounted bottle of LNGV (liquefied natural gas vehicle).If return-air before filling, directly operates return-air before not annotating; If not return-air before filling, in filling process, this filling machine can Real-Time Monitoring air return end pressure, arrives setting value by filling limit, automatic limit return-air.
Wherein, mass flowmenter 11, be arranged between circulating precooling pipeline and liquid feeding rifle 10, after making mass flowmenter 11, again without any collateral branch pipeline, therefore, the LNG Liquefied natural gas through mass flowmenter 11 is all injected in the vehicle-mounted bottle of LNGV (liquefied natural gas vehicle), ensure that the metering authenticity of liquefied natural gas aerating machine.In return line, return-air observing and controlling measuring apparatus 5 is installed, completes filling machine return-air and detect metering.
Operating process of the present utility model:
Liquid feeding rifle is inserted on aerating gun platform; after carrying out precooling; liquid feeding rifle is inserted on LNGV (liquefied natural gas vehicle) vehicle-mounted bottle; return-air rifle is inserted into the gas returning port of LNGV (liquefied natural gas vehicle) vehicle-mounted bottle; start aerating; after gas-fueled vehicles vehicle-mounted bottle to be liquefied adds and fills, filling machine, by autostop, carries out the process such as charging.
In addition, except filling it up with autostop, the utility model also has the function of quota, quantitatively aerating.
The liquefied natural gas aerating machine of the two metering of the single current amount that the utility model provides, specifically a kind of equipment for carrying out annotating to LNGV (liquefied natural gas vehicle), by only having a liquid feeding pipeline after main meter, again without branch, there is not the possibility of aerating cheating, simultaneously, for meeting the usage requirement of domestic liquefied natural gas filling station, the utility model will be used for the mass flowmenter of vehicle-mounted bottle decompression return-air metering, detect measuring apparatus with a set of return-air to replace, it can ensure that the measuring accuracy of a whole set of filling machine meets measuring accuracy requirement, solve the problem that liquefied natural gas aerating machine return-air error in dipping is large, this filling machine is made to have the function of measuring to the metering of vehicle-mounted bottle liquid feeding and vehicle-mounted bottle decompression return-air.Meanwhile, owing to eliminating mass flowmenter, make the internal structure of liquefied natural gas aerating machine more reasonable, significantly reduce the manufacture cost of liquefied natural gas aerating machine.It should be noted that, this return-air detects measuring apparatus and comprises section of tubing, ball valve, pressure transducer and temperature transducer, pipeline is provided with ball valve, pressure transducer and temperature transducer.
The utility model is the measuring accuracy problem ensureing return-air gas phase, return-air detects measuring apparatus by its inner measuring instrument, sensor image data of installing, through ideal-gas equation: PV/T=constant draws real return-air amount after carrying out calculating correction to image data.This device, through repetitious verification experimental verification, meets the measuring accuracy requirement of liquefied natural gas aerating machine return-air.
The utility model removes branch after the mass flowmenter of liquefied natural gas aerating machine, makes the continuous data of mass flowmenter truer, has more convincingness.
The utility model carries out return-air metering by using a set of return-air detection measuring apparatus being foundation with the equation of state of gas-liquid, and what its measuring accuracy manager touched upon and puts into practice repeatedly verifying repeatedly, meets filling machine measuring requirement completely.
How the utility model ensures that return-air measuring accuracy meets the problem of filling machine usage requirement after solving the mass flowmenter that liquefied natural gas aerating machine removes for the return-air that reduces pressure.Also the problem with branch after domestic liquefied natural gas aerating machine main meter is solved.Also solving domestic liquefied natural gas aerating machine generally adopts two mass flowmenters, high expensive problem simultaneously.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (8)

1. a liquefied natural gas aerating machine for the two metering of single current amount, is characterized in that, comprise housing (18), is provided with reflux pipeline, vapor return line, circulating precooling pipeline and filling pipeline in described housing (18), reflux pipeline is connected on filling pipeline by circulating precooling pipeline, reflux pipeline is connected with vapor return line, safety check (2) one end is connected with circulating precooling pipeline through temperature transducer (17), the other end is connected on filling pipeline, described vapor return line comprises filling machine refluxing opening (4), return-air detects measuring apparatus (5), safety check (9) and return-air rifle (8), return-air detects measuring apparatus (5) one end and be connected with return-air rifle (8) by pipeline after safety check (9), the other end is connected with filling machine refluxing opening (4) by pipeline.
2. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 1, it is characterized in that, described filling pipeline comprises the filling machine liquid entering hole (1) connected in turn by pipe-line system (13), pneumatic emergency cutting ball valve (12), mass flowmenter (11) and liquid feeding rifle (10), reflux pipeline is connected between filling machine liquid entering hole (1) and pneumatic emergency cut-off ball valve (12) by circulating precooling pipeline, safety check (2) one end is connected with circulating precooling pipeline through temperature transducer (17), the other end is connected between pneumatic emergency cutting ball valve (12) and mass flowmenter (11).
3. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 2, it is characterized in that, described reflux pipeline comprises filling machine refluxing opening (4), safety check (6) and be fixed on the liquid feeding gun platform (7) of housing, filling machine refluxing opening (4) is connected with safety check (6) by pipeline, safety check (6) is connected with liquid feeding gun platform (7), circulating precooling pipeline one end is connected between filling machine liquid entering hole (1) and pneumatic emergency cut-off ball valve (12), one end is connected between filling machine refluxing opening (4) and safety check (6).
4. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 2, it is characterized in that, circulating precooling pipeline comprises pneumatic emergency cutting ball valve (3) and pipeline, pneumatic emergency cutting ball valve (3) one end is connected between mechanism of qi liquid entering hole (1) and pneumatic emergency cut-off ball valve (12) by pipeline, and the other end is connected between filling machine refluxing opening (4) and safety check (6) by pipeline.
5. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 4, it is characterized in that, housing upper is also provided with electric control unit (19), and the pneumatic emergency cutting ball valve (3) of circulating precooling pipeline and the pneumatic emergency cutting ball valve (12) of filling pipeline are all connected on electric control unit (19) by solenoid valve (20).
6. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 1, it is characterized in that, return-air observing and controlling measuring apparatus (5) comprises the multiple measuring instruments for gathering return-air state.
7. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 1, is characterized in that, be connected with safety valve (14) between filling machine liquid entering hole (1) and pneumatic emergency cut-off ball valve (12).
8. the liquefied natural gas aerating machine of the two metering of single current amount according to claim 1, is characterized in that, the pipeline being connected with temperature transducer (17) is also connected with pressure gauge (15) and pressure transducer (16).
CN201520584481.5U 2015-08-05 2015-08-05 Liquefied natural gas of two measurements of single current volume adds mechanism of qi Active CN204829278U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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