CN109708707B - Gas flow measuring device and measuring method - Google Patents
Gas flow measuring device and measuring method Download PDFInfo
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Abstract
A gas flow measuring device and a measuring method relate to the technical field of fluid flow measurement, and the measuring device comprises a first closed container filled with liquid, a second closed container filled with liquid, a liquid discharging pipeline, an air inlet pipeline, an air outlet pipeline, a bypass pipeline and a liquid level detecting device; the gas inlet pipeline is used for introducing constant-pressure gas into the area above the liquid level in the first closed container, and the constant-pressure gas is insoluble to the liquid; the gas outlet pipeline is connected to the second closed container; the bypass pipeline is communicated with the area above the liquid level in the first closed container and the second closed container; one end of the liquid drainage pipeline is positioned in the liquid in the first closed container, and the other end of the liquid drainage pipeline is positioned in the second closed container; the liquid level detection device is used for detecting the liquid level in the first closed container or the second closed container. The measuring device of the embodiment of the application can measure the flow and the flow velocity of the gas with micro flow, and is high in measuring precision and large in measuring range.
Description
Technical Field
The application relates to the technical field of fluid flow measurement, in particular to a gas flow measurement device and a measurement method.
Background
In indoor scientific experiments, a flowmeter which can meet the requirements of high measurement precision, large measuring range and micro-flow is often needed.
Some flowmeters can measure micro-flow and have small measuring range; the measuring range is large, and micro-flow cannot be measured. The physical characteristics and the measurement environment of the measured fluid have various requirements, for example, a differential pressure flowmeter needs a longer straight pipe section, the connection part of a throttling device and a display instrument is easy to generate leakage, and the measurement precision is higher; the vortex shedding flowmeter is not suitable for fluids with low static pressure, low flow velocity, low density, high viscosity and the like; the electromagnetic flow meter cannot measure petroleum products with low conductivity, and cannot measure gas, steam and liquid containing larger bubbles; the float flowmeter has low voltage resistance and low anti-electromagnetic interference capability; the precision of a fixed displacement flowmeter (such as a gear flowmeter, a scraper flowmeter, a rotor flowmeter, a piston flowmeter and the like) is greatly influenced by the ambient temperature, the fluid viscosity and the abrasion of a transmission part; the physical properties of the fluid measured by the turbine flowmeter have great influence on the flow characteristics, and the calibration characteristics cannot be maintained for a long time; the pipe diameter of the ultrasonic flowmeter is too small to measure micro-flow; mass flowmeters cannot measure low pressure gas, and liquid gas content cannot be accurately measured.
Disclosure of Invention
In order to solve at least one of the above technical problems, an embodiment of the present application provides a gas flow measuring device, which includes a first closed container containing liquid, a second closed container, a liquid discharge pipeline, an air inlet pipeline, an air outlet pipeline, a bypass pipeline, and a liquid level detecting device; the gas inlet pipeline is used for introducing constant-pressure gas into the area above the liquid level in the first closed container, and the constant-pressure gas is insoluble to the liquid; the gas outlet pipeline is connected to the second closed container; the bypass pipeline is communicated with the area above the liquid level in the first closed container and the second closed container; one end of the liquid drainage pipeline is positioned in the liquid in the first closed container, and the other end of the liquid drainage pipeline is positioned in the second closed container; the liquid level detection device is used for detecting the liquid level in the first closed container or the second closed container; and the air inlet pipeline, the bypass pipeline, the liquid discharge pipeline and the air outlet pipeline are respectively provided with a first valve, a second valve, a third valve and a fourth valve.
Another embodiment of the present application provides a method for measuring a gas flow rate using the gas flow rate measurement device provided in the above embodiment, including: closing the liquid discharge pipeline and the gas outlet pipeline, and opening the gas inlet pipeline and the bypass pipeline to balance the pressure of the first closed container and the pressure of the second closed container; and closing the bypass pipeline, opening the liquid discharge pipeline, starting the liquid level detection device, and then opening the gas outlet pipeline.
Has the advantages that:
the gas flow rate measuring device of the embodiment of the application can measure the flow rate and the flow velocity of gas with micro flow, has high measurement precision and large measuring range, and is suitable for measuring pressurized gas.
In the measurement method of the embodiment of the application, the constant-pressure gas is used for pushing the liquid in the first closed container to flow into the second closed container, and the gas in the second closed container is pushed by the inflowing liquid to be discharged from the gas outlet pipeline; and converting the liquid volume change according to the liquid level change in the first closed container or the second closed container to obtain the accumulated volume flow and the flow rate of the gas discharged from the gas outlet pipeline. Easy operation, capability of measuring micro-flow gas, high measurement precision and wide measurement range.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
FIG. 1 is a schematic structural diagram of a gas flow measuring device according to an embodiment of the present application;
the reference signs are: 1. the constant pressure valve comprises a constant pressure valve body, 2, a pressure gauge, 3, an air inlet pipeline, 4, a first valve, 5, liquid, 6, a first closed container, 7, a data processor, 8, a bypass pipeline, 9, a second valve, 10, a third valve, 11, a liquid discharge pipeline, 12, a fourth valve, 13, an air outlet pipeline, 14, a second closed container, 15 and a liquid level detection device.
Detailed Description
The technical scheme of the application is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application.
As shown in fig. 1, an embodiment of the present application provides a gas flow measuring device, which includes a first closed container 6 containing a liquid 5, a second closed container 14, a liquid discharge pipeline 11, an air inlet pipeline 3, an air outlet pipeline 13, a bypass pipeline 8, and a liquid level detection device 15.
The gas inlet pipeline 3 is used for introducing constant-pressure gas into the area above the liquid level in the first closed container 6, and the constant-pressure gas is insoluble in the liquid 5. The air inlet pipeline 3 is provided with a first valve 4 for opening or closing the air inlet pipeline 3.
In order to ensure that the gas entering the area above the liquid level in the first closed container 6 is constant pressure, the air inlet pipeline 3 can be provided with a constant pressure valve 1. The air inlet pipeline 3 can be also provided with a pressure gauge 2 to detect the pressure of the gas in the air inlet pipeline 3.
The gas outlet pipeline 13 is connected to the second closed container 14, and a fourth valve 12 is arranged on the gas outlet pipeline 13 and used for opening or closing the gas outlet pipeline 13.
The bypass line 8 communicates the region above the liquid level in the first closed casing 6 with the second closed casing 14, and is used for equalizing the pressures of the first closed casing 6 and the second closed casing 14. And a second valve 9 is arranged on the bypass pipeline 8 and used for opening or closing the bypass pipeline 8.
One end of the drainage pipeline 11 is positioned in the liquid 5 in the first closed container 6, and the other end is positioned in the second closed container 14. The liquid discharge line 11 is used to flow the liquid 5 in the first closed casing 6 into the second closed casing 14. And a third valve 10 is arranged on the drainage pipeline 11 and is used for opening or closing the drainage pipeline 11.
The liquid level detection device 15 is used for detecting the liquid level in the first closed container 6 or the second closed container 14. The liquid level detection device 15 can adopt a liquid level meter, and can accurately detect the liquid level by utilizing a high-precision liquid level meter.
The volume change of the liquid 5 in the first closed container 6 can be calculated according to the liquid level change in the first closed container 6 and the sectional area of the first closed container 6; alternatively, the change in volume of the liquid 5 in the second closed vessel 14 can be calculated from the change in the liquid level in the second closed vessel 14 and the cross-sectional area of the second closed vessel 14. In order to calculate the volume change of the liquid 5, the first closed container 6 or the second closed container 14 may be provided as a container with an equal sectional area.
In order to meet the measurement range requirement, the first closed container 6 needs to be filled with the liquid 5 which is not less than the measurement range requirement in advance, and the volumes of the first closed container 6 and the second closed container 14 also need to be not less than the measurement range requirement.
In this embodiment, a data processor 7 may be further provided, and the data processor 7 may be in data communication with the liquid level detection device 15, and convert the liquid level data detected by the liquid level detection device 15 into volume data of the liquid 5, and further convert the volume data into volume flow data of the gas discharged from the gas outlet pipeline 13.
With reference to fig. 1, another embodiment of the present application provides a method for measuring a gas flow rate by using the gas flow rate measurement device provided in the above embodiment, including: closing the liquid discharge pipeline 11 and the gas outlet pipeline 13, and opening the gas inlet pipeline 3 and the bypass pipeline 8 to balance the pressure of the first closed container 6 and the second closed container 14; the bypass line 8 is closed, the drain line 11 is opened, the level detection device 15 is started, and then the outlet line 13 is opened.
The method for measuring the gas flow comprises the following steps:
and S1, closing the first valve 4, the third valve 10 and the fourth valve 12, opening a gas source of the measured gas (the gas source is used for introducing constant-pressure gas into the first closed container 6 through the gas inlet pipeline 3), and adjusting the constant-pressure valve 1 to the experimental pressure.
S2, opening the first valve 4 and then opening the second valve 9, and equalizing the pressures of the first closed vessel 6 and the second closed vessel 14.
S3, closing the second valve 9, then opening the third valve 10, starting the liquid level detection device 15, and finally opening the fourth valve 12.
In this embodiment, the liquid level detection device 15 detects the liquid level in the first closed vessel 6, and the first closed vessel 6 is a vessel having an equal cross-sectional area, which has a cross-sectional area S. Recording liquid level data detected by the liquid level detection device 15 when the fourth valve 12 is opened as L1, and ending the measurement after a period of time T, where the liquid level data detected by the liquid level detection device 15 is L2, and then the total volume V1 of the gas flowing through the fourth valve 12 within the time T is equal to the total volume V2 of the constant-pressure gas flowing through the first valve 4, that is, V1 is equal to V2 (L1-L2) × S.
The flow rate of the gas flowing through the fourth valve 12 or the first valve 4 is the cumulative volume increment per unit time, and can be automatically acquired by the data processor 7, calculated by programming or displayed by a graph (a trend graph of the total volume change along with time).
In the measuring method of the embodiment, the constant-pressure gas is used for pushing the liquid 5 in the first closed container 6 to flow into the second closed container 14, and the gas in the second closed container 14 is pushed by the inflowing liquid 5 to be discharged from the gas outlet pipeline 13; the cumulative volume flow rate and flow velocity of the gas discharged from the gas outlet line 13 are obtained from the change in volume of the liquid 5 converted from the change in liquid level in the first closed vessel 6 or the second closed vessel 14. Easy operation, capability of measuring micro-flow gas, high measurement precision and wide measurement range.
The measuring method and the measuring device have the advantages of wide measuring range, high precision and strong environment interference resistance, and can measure the flow and the flow speed of the pressurized gas with micro-flow. The device is suitable for indoor scientific experiments in industries such as metallurgy, electric power, coal, petroleum, chemical engineering, light textile, food, medicine, pesticide, environmental protection and the like.
Claims (3)
1. A gas flow measuring device characterized by: the liquid level detection device comprises a first closed container filled with liquid, a second closed container filled with liquid, a liquid discharge pipeline, an air inlet pipeline, an air outlet pipeline, a bypass pipeline and a liquid level detection device;
the gas inlet pipeline is used for introducing constant-pressure gas into the area above the liquid level in the first closed container, and the constant-pressure gas is insoluble to the liquid;
the gas outlet pipeline is connected to the second closed container;
the bypass pipeline is communicated with the area above the liquid level in the first closed container and the second closed container;
one end of the liquid drainage pipeline is positioned in the liquid in the first closed container, and the other end of the liquid drainage pipeline is positioned in the second closed container;
the liquid level detection device is used for detecting the liquid level in the first closed container or the second closed container;
and the air inlet pipeline, the bypass pipeline, the liquid discharge pipeline and the air outlet pipeline are respectively provided with a first valve, a second valve, a third valve and a fourth valve.
2. The gas flow measuring device of claim 1, wherein: and a constant pressure valve is also arranged on the air inlet pipeline.
3. A method of measuring gas flow using the gas flow measurement device of claim 2, comprising:
closing the first valve on the gas inlet pipeline, the third valve on the liquid discharge pipeline and the fourth valve on the gas outlet pipeline, opening a gas source of the gas to be measured, and adjusting the constant pressure valve to an experimental pressure, wherein the gas source is used for introducing constant pressure gas into the first closed container through the gas inlet pipeline;
opening the second valve on a bypass pipeline after opening the first valve on the air inlet pipeline so as to balance the pressure of the first closed container and the second closed container;
closing the second valve on the bypass pipeline, then opening the third valve on the liquid discharge pipeline, starting the liquid level detection device, and then opening the fourth valve on the gas outlet pipeline;
after the time T, if the measurement is finished, the total volume V1 of the gas flowing through the fourth valve within the time T is equal to the total volume V2 of the constant pressure gas flowing through the first valve, and V1 is equal to V2, Δ lxs, where Δ L is an absolute value of a difference between L1 and L2, L1 is a liquid level detected by the liquid level detection device when the fourth valve is opened, L2 is a liquid level detected by the liquid level detection device when the measurement is finished, and S is a sectional area of the first closed container or the second closed container detected by the liquid level detection device; the flow rate of gas flowing through the fourth valve or the first valve during the measurement is the cumulative volume increase per unit time.
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| CN201910127035.4A CN109708707B (en) | 2019-02-20 | 2019-02-20 | Gas flow measuring device and measuring method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110082048A (en) * | 2019-06-11 | 2019-08-02 | 靳殷实 | A kind of detection of gas flow rate device |
| CN110260935B (en) * | 2019-07-29 | 2024-08-09 | 盛密科技(上海)有限公司 | Flow detection device |
| CN110736503A (en) * | 2019-10-17 | 2020-01-31 | 浙江高成绿能科技有限公司 | continuous gas measuring device |
| CN112146720B (en) * | 2020-09-21 | 2023-10-20 | 兰州空间技术物理研究所 | Micro gas flow measuring device and method |
| CN112067528B (en) * | 2020-09-30 | 2025-03-25 | 农业农村部环境保护科研监测所 | Porosity measuring device and porosity measuring method |
| CN113155209A (en) * | 2021-05-20 | 2021-07-23 | 重庆灏宁生物技术有限公司 | Device for determining liquid flow rate through gas-liquid mixed backflow |
| CN113551737B (en) * | 2021-07-22 | 2022-10-11 | 中国核动力研究设计院 | Liquid level measuring device and measuring method |
| CN115433594B (en) * | 2022-09-28 | 2023-12-05 | 张双兴 | Pressure adjusting method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154415A (en) * | 1984-08-27 | 1986-03-18 | Toru Nagasaka | Container with quantitative measuring instrument |
| CN105606178A (en) * | 2015-12-29 | 2016-05-25 | 浙江大学 | Multifunctional flow velocity and flow rate measuring device and measuring method using device |
| CN106949943A (en) * | 2017-03-15 | 2017-07-14 | 湖北工程学院 | Gas volume measurement apparatus and fuel cell module |
| CN206756253U (en) * | 2017-05-23 | 2017-12-15 | 易安蓝焰煤与煤层气共采技术有限责任公司 | Small-sized anaerobic fermentation system gas measurement device |
| CN107560683A (en) * | 2016-06-30 | 2018-01-09 | 中国石油化工股份有限公司 | Gas-metering device |
| CN207528283U (en) * | 2017-10-18 | 2018-06-22 | 涂勇 | A kind of gas draining gas-metering device |
| CN109163777A (en) * | 2018-10-23 | 2019-01-08 | 安徽科幂机械科技有限公司 | It is a kind of to monitor the small system and method for producing air volume and flow |
-
2019
- 2019-02-20 CN CN201910127035.4A patent/CN109708707B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154415A (en) * | 1984-08-27 | 1986-03-18 | Toru Nagasaka | Container with quantitative measuring instrument |
| CN105606178A (en) * | 2015-12-29 | 2016-05-25 | 浙江大学 | Multifunctional flow velocity and flow rate measuring device and measuring method using device |
| CN107560683A (en) * | 2016-06-30 | 2018-01-09 | 中国石油化工股份有限公司 | Gas-metering device |
| CN106949943A (en) * | 2017-03-15 | 2017-07-14 | 湖北工程学院 | Gas volume measurement apparatus and fuel cell module |
| CN206756253U (en) * | 2017-05-23 | 2017-12-15 | 易安蓝焰煤与煤层气共采技术有限责任公司 | Small-sized anaerobic fermentation system gas measurement device |
| CN207528283U (en) * | 2017-10-18 | 2018-06-22 | 涂勇 | A kind of gas draining gas-metering device |
| CN109163777A (en) * | 2018-10-23 | 2019-01-08 | 安徽科幂机械科技有限公司 | It is a kind of to monitor the small system and method for producing air volume and flow |
Non-Patent Citations (1)
| Title |
|---|
| 液体火箭贮箱增压排液过程三种气枕模型的数值对比;王磊等;《航空动力学报》;20110915;全文 * |
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