CN111289064A - Online calibrating device and method for metering performance of hydrogenation machine - Google Patents
Online calibrating device and method for metering performance of hydrogenation machine Download PDFInfo
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- CN111289064A CN111289064A CN202010255830.4A CN202010255830A CN111289064A CN 111289064 A CN111289064 A CN 111289064A CN 202010255830 A CN202010255830 A CN 202010255830A CN 111289064 A CN111289064 A CN 111289064A
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- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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Abstract
The invention discloses an online calibrating device and method for the metering performance of a hydrogenation machine, which comprises the hydrogenation machine, a static mass method device and a data acquisition and processing mechanism, wherein the hydrogenation machine comprises a display screen, an air inlet valve group, a pressure gauge and a mass flowmeter, the air inlet valve group is connected with an air source, and the air inlet valve group, the pressure gauge and the mass flowmeter are sequentially connected. The measuring principle of the invention is based on the law of mass conservation, and the electronic scale is taken as the measuring standard, so that the flow quantity value of the hydrogenation machine can be directly traced to the mass quantity value of the electronic scale; compared with the original standard table method hydrogenation machine calibration method which takes a higher-level standard table as a measurement standard, the method has the advantages of short traceability chain, few intermediate links, few uncertainty factors, high measurement accuracy and the like, can be applied in a laboratory and a field, improves the measurement accuracy while ensuring the detection convenience, and is worthy of great popularization.
Description
Technical Field
The invention relates to the technical field of hydrogen energy metering, in particular to an online calibration device and method for the metering performance of a hydrogenation machine.
Background
Hydrogen is used as an energy source, and the product of oxidation combustion only contains water, and the unit calorific value is higher, so the development and utilization of hydrogen energy are more and more emphasized by the society, and the development of hydrogen energy is enhanced in all main countries in the world, and the hydrogen energy cause is vigorously developed.
The hydrogenation machine is a special equipment for filling hydrogen gas into gas storage container and has the devices of metering and pricing, etc. Comprises a mass flow meter, an electronic controller, a quick cut-off valve, a hydrogenation gun and the like. As a measuring instrument for trade handover, the accuracy of the measuring performance of the hydrogenation machine is highly valued by government regulatory departments and various social circles.
Through retrieval, the Chinese patent No. CN110726459A discloses a hydrogenation machine on-site calibrating device, which comprises a computer, a high-pressure pipeline, a pressure gauge, an electromagnetic valve, a stop valve, a flow sensor and a flow transmitter, wherein one end of the high-pressure pipeline is provided with a hydrogenation gun interface, the other end of the high-pressure pipeline is provided with a gas cylinder interface, and the flow sensor, the pressure gauge, the electromagnetic valve and the stop valve are arranged on the high-pressure pipeline between the hydrogenation gun interface and the gas cylinder interface; the flow sensor is electrically connected with the flow transmitter, the computer is simultaneously in signal connection with the flow transmitter and the hydrogenation amount display module of the hydrogenation machine, and the computer can compare and analyze the actual hydrogenation amount sent by the flow transmitter with the hydrogenation amount displayed by the hydrogenation amount display module of the hydrogenation machine and judge whether the metering of the hydrogenation machine is accurate or not.
The calibration method provided by the prior art needs to determine the metering accuracy of the used standard flowmeter, and the tracing of the standard flowmeter mostly adopts a mass method and a standard table method to trace to the upper-level flow standard device, so that the tracing chain of the method is long, the uncertainty factor possibly introduced is more, and the accuracy of the standard flowmeter used in field calibration needs to be demonstrated.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an online calibrating device and method for the metering performance of a hydrogenation machine.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an online calibrating device of hydrogenation machine metering performance, includes hydrogenation machine, static mass method device, data acquisition and processing mechanism, the hydrogenation machine includes display screen, valves of admitting air, manometer, mass flowmeter, the valves of admitting air links to each other with the air supply, valves of admitting air, manometer and mass flowmeter connect gradually, the hydrogenation machine is installed and is added hydrogen the rifle, static mass method device includes hydrogenation rifle connector, instructs flowmeter, leading flow control valve, pressure sensor, gas cylinder valve group, electronic scale, gas bomb group, the hydrogenation rifle is connected with hydrogenation rifle connector through fast joint, hydrogenation rifle connector, instruction flowmeter, leading flow control valve, pressure sensor, gas cylinder valve group, gas bomb group connect gradually, gas bomb group places on the electronic scale, data acquisition and processing mechanism include computer, data acquisition and processing mechanism, And the data acquisition and control board card.
Further, the hydrogenation gun connector is provided with a plurality of quick-clamping connectors.
Further, the accuracy grade of the indicating flowmeter is not lower than grade 2.5, and the accuracy grade of the electronic scale is not lower than grade III.
Further, the gas cylinder valve group comprises 3 valves.
Further, the gas cylinder group comprises 3 gas cylinders.
Further, the computer controls the preposed flow regulating valve and the gas cylinder valve group at the same time, and the computer can realize the reading of the pressure sensor and the electronic scale.
A method for on-line calibrating the metering performance of a hydrogenation machine comprises the following steps: s1, dividing the flow range of the whole hydrogenation machine into a low flow area R (3), a middle flow area R (2) and a high flow area R (1);
s2, the computer collects or manually records the initial value and the final value of each measured electronic scale and the hydrogenation value displayed on a display screen of the hydrogenation machine, and the metering performance of the calibrated hydrogenation machine is comprehensively evaluated through a comparison method.
Further, in step S1, for the purpose of controlling the flow rate region during measurement, it is necessary to add hydrogen gas to the initial pressure of the hydrogen gas storage cylinder group respectively within a predetermined pressure range, and perform 3 measurements for each flow rate region.
Compared with the prior art, the invention has the beneficial effects that:
the measuring principle of the invention is based on the law of mass conservation, and the electronic scale is taken as the measuring standard, so that the flow quantity value of the hydrogenation machine can be directly traced to the mass quantity value of the electronic scale; compared with the original standard table method hydrogenation machine calibration method which takes a higher-level standard table as a measurement standard, the method has the advantages of short traceability chain, few intermediate links, few uncertainty factors, high measurement accuracy and the like, can be applied in a laboratory and a field, improves the measurement accuracy while ensuring the detection convenience, and is worthy of great popularization.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the overall structure of an on-line calibration device for the metering performance of a hydrogenation machine according to the present invention;
FIG. 2 is a flow chart of an on-line calibration method for the metering performance of a hydrogenation machine according to the present invention.
In the figure: the device comprises a hydrogenation machine 1, a hydrogenation gun 2, a hydrogenation gun connector 3, an indication flowmeter 4, a preposed flow control valve 5, a pressure sensor 6, a gas cylinder valve group 7, an electronic scale 8, a gas cylinder group 9, a computer 10, a display screen 11, a gas inlet valve group 12, a pressure gauge 13 and a mass flowmeter 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, an on-line calibration device for the metering performance of a hydrogenation machine comprises a hydrogenation machine 1, a static mass method device and a data acquisition and processing mechanism, wherein the hydrogenation machine 1 comprises a display screen 11, an air inlet valve group 12, a pressure gauge 13 and a mass flow meter 14, the air inlet valve group 12 is connected with an air source, the air inlet valve group 12, the pressure gauge 13 and the mass flow meter 14 are sequentially connected, a hydrogenation gun 2 is installed on the hydrogenation machine 1, the static mass method device comprises a hydrogenation gun connector 3, an indication flow meter 4, a front flow control valve 5, a pressure sensor 6, a gas cylinder valve group 7, an electronic scale 8 and a gas cylinder group 9, the hydrogenation gun 2 is connected with the hydrogenation gun connector 3 through a quick connector, the hydrogenation gun connector 3, the indication flow meter 4, the front flow control valve 5, the pressure sensor 6, the gas cylinder valve group 7 and the gas cylinder group 9 are sequentially connected, the gas cylinder group 9, the data acquisition and processing mechanism comprises a computer 10 and a data acquisition and control board card.
The data acquisition and control refers to the reading acquisition of the electronic scale 8 and the pressure sensor 6 and the opening and closing control of the front flow regulating valve 5 and the gas cylinder valve group 7.
Further, the hydrogenation gun connector 3 is provided with various quick-snap joints.
Further, it is indicated that the accuracy grade of the flow meter 4 is not lower than grade 2.5, and the accuracy grade of the electronic scale 8 is not lower than grade III.
Further, the cylinder valve group 7 includes 3 valves.
Further, the gas cylinder group 9 includes 3 gas cylinders.
The gas storage cylinder is used for storing hydrogen flowing through the hydrogenation machine 1 and the detection pipeline in the verification process, each test of each flow area inflates one gas storage cylinder, and the pressure in the cylinder during inflation meets the requirement of the current flow area.
For a hydrogenation machine with the rated working pressure of 35MPa, when calibrating a low-flow region R (3), the pressure in a bottle is initially (21-22) MPa; when the middle flow area R (2) is calibrated, the pressure in the bottle is initially (11-12) MPa; when the convection current high area R (1) is calibrated, the pressure in the bottle is initially (1-2) MPa; for a hydrogenation machine with the rated working pressure of 70MPa, when calibrating a flow low region R (3), the pressure in a bottle is initially (55-58) MPa; when the middle flow area R (2) is calibrated, the pressure in the bottle is initially (28-31) MPa; in the calibration of the convection height region R (1), the pressure in the bottle should be initially (1-3) MPa.
Further, the computer 10 controls the front flow regulating valve 5 and the gas cylinder valve group 7 at the same time, and the computer 10 can realize the reading of the pressure sensor 6 and the electronic scale 8.
Referring to fig. 2, a method for on-line calibration of the metering performance of a hydrogenation machine, the method comprising the steps of: s1, dividing the flow range of the whole hydrogenation machine into a low flow area R (3), a middle flow area R (2) and a high flow area R (1);
s2, the computer collects or manually records the initial value and the final value of each measured electronic scale and the hydrogenation value displayed on a display screen of the hydrogenation machine, and the metering performance of the calibrated hydrogenation machine is comprehensively evaluated through a comparison method.
Further, in step S1, for the purpose of controlling the flow rate region during measurement, it is necessary to add hydrogen gas to the initial pressure of the hydrogen gas storage cylinder group respectively within a predetermined pressure range, and perform 3 measurements for each flow rate region.
The method uses an electronic measuring standard device to carry out measurement, and the mathematical expression of the measurement principle is
EHydrogenation machine＝mIndication value-(mTerminate-mInitial)
Wherein E isHydrogenation machineM is an absolute indication error of the hydrogenation machine in one measurementIndication valueFor the hydrogenation value, m, displayed by the display device of the hydrogenation machine in one measurementTerminateM is the end value after hydrogenation of the electronic scaleInitialIs an indication value of the electronic scale before hydrogenation.
The detailed steps of the calibration method are as follows:
the method comprises the following steps: detecting a low flow region R (3); after the gas tightness of the detection pipeline is proved to be good, opening one of the preposed flow regulating valve 5 and the gas cylinder valve group 7 through the computer 10 and the data acquisition and control board card, starting the hydrogenation machine 1, starting a gas source, inflating the gas cylinder, observing a gas cylinder pressure indicator, reaching (21-22) MPa, closing all valves, stopping the hydrogenation machine, and stopping inflation; resetting the hydrogenation machine 1, and simultaneously recording the current value of the electronic scale 8 as mInitial；
Step two: opening the preposed flow control valve 5 and the automatic valve in the process again, starting the hydrogenation machine 1, starting the gas source, inflating the gas storage cylinder, closing all the valves when the pressure indicating device of the gas storage cylinder reaches (34-35) MPa, stopping the hydrogenation machine, and stopping inflation; at the same time, reading the reading of the display 11 of the hydrogenation machine and the indication value m of the electronic scale 8 by manpower or a computerTerminate；
Step three: comparing the reading displayed by the display 11 of the hydrogenation machine with the difference before and after hydrogenation of the electronic scale to obtain the absolute error of the indication value of the hydrogenation machine detected at one time in the low flow area R (3);
step four: replacing the gas storage cylinder of the hydrogen gas storage cylinder group 9, repeating the step one to the step three times, and taking the average value of 3 times of measurement as the indication value absolute error of the flow low region R (3);
step five: carrying out error measurement on the middle flow area R (2) and the high flow area R (1); repeating the first step to the fourth step, wherein when the flow middle area R (2) is measured, the initial pressure value of the gas storage bottle is (11-12) MPa; when the flow rate high region R (1) is measured, the initial pressure value of the gas storage cylinder is (1-2) MPa.
So far, the indication value errors of all flow areas of the hydrogenation machine 1 are detected. It should be noted that in the high, medium and low flow regions defined in the above examples, the initial pressure value of the gas cylinder needs to be determined according to the rated working pressure of the hydrogenation machine. At present, the rated working pressure of the domestic mainstream hydrogenation machine is 35MPa and 70 MPa. For a 70MPa hydrogenation machine, when the measurement performance of a high-medium-low flow area is detected, the initial pressure value of a gas storage cylinder is (1-3) MPa, (28-31) MPa, and (55-58) MPa.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device has simple structure and convenient use, and is suitable for field calibration and laboratory calibration of the hydrogenation machine;
(2) the electronic scale is used as a measurement standard, so that the flow value is directly traced to a quality value, the tracing chain is short, uncertain factors are few, and the accuracy is high;
(3) the device can realize comprehensive detection from a high flow area to a low flow area of the hydrogenation machine, and can evaluate the metering performance of the tested oiling machine more comprehensively.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An on-line calibration device for the metering performance of a hydrogenation machine comprises the hydrogenation machine (1), a static mass method device and a data acquisition and processing mechanism, wherein the hydrogenation machine (1) comprises a display screen (11), an air inlet valve group (12), a pressure gauge (13) and a mass flow meter (14), the air inlet valve group (12) is connected with an air source, the air inlet valve group (12), the pressure gauge (13) and the mass flow meter (14) are sequentially connected, and the hydrogenation machine (1) is provided with a hydrogenation gun (2), and the on-line calibration device is characterized in that the static mass method device comprises a hydrogenation gun connector (3), an indication flow meter (4), a front flow control valve (5), a pressure sensor (6), an air cylinder valve group (7), an electronic scale (8) and an air storage cylinder group (9), wherein the hydrogenation gun (2) is connected with the hydrogenation gun connector (3) through a quick connector, the device is characterized in that the hydrogenation gun connector (3), the indicating flow meter (4), the front flow regulating valve (5), the pressure sensor (6), the gas cylinder valve group (7) and the gas storage cylinder group (9) are sequentially connected, the gas storage cylinder group (9) is placed on the electronic scale (8), and the data acquisition and processing mechanism comprises a computer (10) and a data acquisition and control board card.
2. The device and the method for the on-line calibration of the metering performance of the hydrogenation machine are characterized in that the hydrogenation gun connector (3) is provided with a plurality of quick-clamping connectors.
3. The on-line calibration device and method for the metering performance of the hydrogenation machine according to claim 1, wherein the accuracy grade of the indicating flowmeter (4) is not lower than 2.5 grade, and the accuracy grade of the electronic scale (8) is not lower than III grade.
4. The device and the method for the on-line calibration of the metering performance of the hydrogenation machine according to the claim 1, wherein the gas cylinder valve group (7) comprises 3 valves.
5. The device and the method for the on-line calibration of the metering performance of the hydrogenation machine according to the claim 1, wherein the gas cylinder group (9) comprises 3 gas cylinders.
6. The on-line calibration device and method for the metering performance of the hydrogenation machine according to claim 1 are characterized in that the computer (10) controls the preposed flow regulating valve (5) and the gas cylinder valve group (7) simultaneously, and the computer (10) can realize the reading of the pressure sensor (6) and the electronic scale (8).
7. An on-line calibration method for the metering performance of a hydrogenation machine is characterized by comprising the following steps:
s1, dividing the flow range of the whole hydrogenation machine into a low flow area R (3), a middle flow area R (2) and a high flow area R (1);
s2, the computer collects or manually records the initial value and the final value of each measured electronic scale and the hydrogenation value displayed on a display screen of the hydrogenation machine, and the metering performance of the calibrated hydrogenation machine is comprehensively evaluated through a comparison method.
8. The method of claim 7, wherein in step S1, for the purpose of controlling the flow rate region during measurement, the initial pressure of the hydrogen gas storage cylinder group is added with hydrogen gas to a predetermined pressure range, and each flow rate region is measured 3 times.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982555A (en) * | 2020-08-18 | 2020-11-24 | 上海舜华新能源系统有限公司 | Hydrogenation machine test platform |
| CN115343086A (en) * | 2022-08-04 | 2022-11-15 | 上海智能新能源汽车科创功能平台有限公司 | Online pre-detection method and system for high-pressure hydrogenation machine |
-
2020
- 2020-04-02 CN CN202010255830.4A patent/CN111289064A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982555A (en) * | 2020-08-18 | 2020-11-24 | 上海舜华新能源系统有限公司 | Hydrogenation machine test platform |
| CN115343086A (en) * | 2022-08-04 | 2022-11-15 | 上海智能新能源汽车科创功能平台有限公司 | Online pre-detection method and system for high-pressure hydrogenation machine |
| CN115343086B (en) * | 2022-08-04 | 2024-05-03 | 上海智能新能源汽车科创功能平台有限公司 | Online pre-detection method and system for high-pressure hydrogenation machine |
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