CN208313769U - A kind of filter sizes analyzer with double pressure and two-flow test gas circuit structure - Google Patents
A kind of filter sizes analyzer with double pressure and two-flow test gas circuit structure Download PDFInfo
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- CN208313769U CN208313769U CN201820392654.7U CN201820392654U CN208313769U CN 208313769 U CN208313769 U CN 208313769U CN 201820392654 U CN201820392654 U CN 201820392654U CN 208313769 U CN208313769 U CN 208313769U
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Abstract
The utility model discloses a kind of filter sizes analyzer for testing gas circuit structure with double pressure and two-flow, dual pressure sensor and double-current quantity sensor；Wherein, dual pressure sensor is namely for measuring the pressure sensor of the wide range of high pressure, and the pressure sensor of the small-range for measuring low-pressure；Double-current quantity sensor is namely for measuring the flow sensor of the wide range of larger flow, and the flow sensor of the small-range for measuring smaller flow.The pressure and flow of gas of the filter sizes analyzer in the test initial stage, gas circuit are smaller, and the pressure sensor of small-range and flow sensor can accurately measure the pressure and flow of gas in gas circuit at this time.When the pressure for the gas being passed through in gas circuit increases to the measuring limit of small-range pressure sensor, software automatically controls the protection valve starting of small-range pressure sensor, and the pressure sensor of small-range is picked out gas circuit.The precise measurement of gas high pressure is not only realized, while also protecting small-range pressure sensor not damaged.When gas flow increases to the measuring limit of small-range flow sensor in gas circuit, software automatically controls small-range flow sensor protection valve and opens, and to reduce the air-flow for flowing through small-range flow sensor, realizes the protection to small-range flow sensor；At this point, wide range flow sensor can accurately read the flow of gas circuit gas.The gas circuit structure increases the measurement range of the pressure of gas and flow in gas circuit, increases the pressure measurement accuracy of high pressure section and low pressure stage, while realizing the precise measurement of larger flow and smaller flow；In addition, protecting small-range pressure sensor and small-range flow sensor not damaged when pressure is higher, flow is larger.
Description
Technical Field
The utility model relates to a filter membrane aperture analysis field, concretely relates to filter membrane aperture analysis appearance of gas circuit structure with two pressure sensor and double flow sensor.
Background
When the filter membrane aperture analyzer is used for measuring the aperture size and the aperture distribution, gas needs to be continuously pressed into the gas path, so that the gas pressure and the gas flow in the gas path are continuously increased from small to large. The pressure and the flow of the gas in the gas path are important parameters for calculating the pore size and the pore size distribution, and the accuracy of the measurement of the gas pressure and the gas flow in the gas path directly influences the precision of the measurement result of the filter membrane pore size analyzer.
At present, filter membrane aperture analyzers at home and abroad all adopt a gas path structure of a single pressure sensor and a single flow sensor. The gas circuit structure has the disadvantages of narrow pressure measurement range and low accuracy; especially, when measuring the pressure of the high-pressure section and the low-pressure section, the measurement result has larger error and has larger influence on the accuracy of the instrument test.
Disclosure of Invention
Based on the problem that prior art exists, the utility model provides a be applied to filter membrane aperture analyzer's double pressure and double flow test's gas circuit structure, this utility model has increased the measuring range of gas pressure and flow among the gas circuit structure, and has realized the pressure and the great flow of high-pressure section and low pressure section and the accurate measurement of less flow, has promoted filter membrane aperture analyzer's measurement accuracy.
The utility model aims at realizing through the following technical scheme:
the utility model provides a be applied to filter membrane aperture analyzer's double pressure and gas circuit structure of double flow test, its characterized in that: dual pressure sensors and dual flow sensors; wherein,
the double pressure sensors are respectively a pressure sensor for measuring a large range of high pressure and a pressure sensor for measuring a small range of low pressure;
the dual flow sensors are a wide-range flow sensor for measuring a large flow and a small-range flow sensor for measuring a small flow, respectively.
In the initial stage of the test, the pressure and the flow of the gas in the gas path are small, and at the moment, the pressure and the flow of the gas in the gas path can be accurately measured by the small-range pressure sensor and the small-range flow sensor. When the pressure of the gas introduced into the gas circuit is increased to the measurement limit of the small-range pressure sensor, the software automatically controls the start of the small-range pressure sensor protection valve to connect the small-range pressure sensor out of the gas circuit. Not only realizes the accurate measurement of the high pressure of the gas, but also protects the small-range pressure sensor from being damaged. When the gas flow in the gas path is increased to the measurement limit of the small-range flow sensor, the software automatically controls the small-range flow sensor protection valve to be opened so as to reduce the gas flow flowing through the small-range flow sensor and realize the protection of the small-range flow sensor; at this time, the wide-range flow sensor can accurately read the flow of the gas in the gas path.
By the above technical scheme, the utility model provides a can see out, the utility model provides a pair of filter membrane aperture analysis appearance with two pressure sensor and double flow sensor, its beneficial effect is: the measuring range of the pressure and the flow of the gas in the gas path is enlarged, the pressure measuring precision of the high-pressure section and the low-pressure section is increased, and the accurate measurement of larger flow and smaller flow is realized; in addition, when the pressure is high and the flow is large, the small-range pressure sensor and the small-range flow sensor are protected from being damaged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a gas path block diagram with dual pressure and dual flow sensors
In the figure, 1, a large-range pressure sensor, 2, a small-range pressure sensor, 3, a large-range flow sensor, 4, a small-range flow sensor, 5, an electric control pressure regulating valve, 6, a small-range pressure sensor protection valve, 7, an emptying valve, 8, a small-range flow sensor protection valve, 9, a filter membrane sample and 10, air inlets are arranged.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows, the utility model provides a be applied to filter membrane aperture analyzer's double pressure and gas circuit structure of two flow tests, include: the device comprises a large-range pressure sensor 1, a small-range pressure sensor 2, a large-range flow sensor 3, a small-range flow sensor 4, an electronic control pressure regulating valve 5, a small-range pressure sensor protection valve 6, a small-range flow sensor protection valve 8, a filter membrane sample 9 and an air inlet 10; wherein,
the large-range pressure sensor 1 and the small-range pressure sensor 2 are arranged on the same gas circuit pipeline; the front end of the small-range pressure sensor is provided with a small-range pressure sensor protection valve 6, and the small-range pressure sensor protection valve can connect the small-range pressure sensor out of the gas path structure. The wide-range pressure sensor is used for measuring high pressure in the gas circuit structure, and the small-range pressure sensor is used for measuring low pressure in the gas circuit.
The wide-range flow sensor 3 and the small-range flow sensor 4 are arranged on the same gas circuit pipeline; a shunt pipeline is arranged between the two flow sensors, a small-range flow sensor protection valve 8 is arranged on the shunt pipeline, and the small-range flow sensor protection valve plays a role in shunting after being opened, so that the air flow flowing through the small-range flow sensor is reduced.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 shows, the utility model provides a filter membrane aperture analyzer of gas circuit structure with two pressure sensor and double flow sensor, include: the device comprises a large-range pressure sensor 1, a small-range pressure sensor 2, a large-range flow sensor 3, a small-range flow sensor 4, an electronic control pressure regulating valve 5, a small-range pressure sensor protection valve 6, a small-range flow sensor protection valve 8, a filter membrane sample 9 and an air inlet 10; wherein,
when the filter membrane aperture analyzer is used for measuring the aperture size and aperture distribution of the sample 9, gas enters from the gas inlet 10, the electric control pressure regulating valve 5 regulates the inlet gas flow to enter the gas path from small to large, and the pressure and the flow of the gas in the gas path are gradually increased from small to large. At the beginning of the test, the pressure and the flow of the gas introduced into the gas path are small, at the moment, the large-range pressure sensor 1 and the small-range pressure sensor 2 can measure the pressure of the gas in the gas path, but the gas pressure in the gas path is small, the pressure value measured by the small-range pressure sensor is more accurate, and at the moment, the filter membrane aperture analyzer adopts the pressure value measured by the small-range pressure sensor; similarly, when the flow in the gas path is small, the gas flow value measured by the small-range flow sensor is more accurate, and the filter membrane aperture analyzer adopts the gas flow value measured by the small-range flow sensor.
When the pressure of the gas introduced into the gas path is close to the measurement limit of the small-range pressure sensor, the software automatically controls the small-range pressure sensor protective valve 6 to be closed, the small-range pressure sensor is connected out of the gas path, and the gas pressure in the gas path is measured by the large-range flow sensor 4; the small-range pressure sensor is protected from being damaged while high-pressure measurement is realized. When the flow of the gas in the gas path approaches the measurement limit of the small-range flow sensor, the small-range flow sensor protection valve 8 is opened, and a part of the gas in the gas path flows out through a shunt pipeline arranged between the two flow sensors, so that the gas flow flowing through the small-range flow sensor is reduced, and the small-range flow sensor is protected; at this time, the air flow in the air path is measured by the wide-range flow sensor 4.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A filter membrane aperture analyzer having a dual pressure and dual flow test gas path structure, comprising: a large-range pressure sensor, a small-range pressure sensor, a large-range flow sensor, a small-range pressure sensor protection valve and a small-range flow sensor protection valve; the large-range pressure sensor and the small-range pressure sensor are arranged on the same gas circuit pipeline; the front end of the small-range pressure sensor is provided with the small-range pressure sensor protection valve; the large-range flow sensor and the small-range flow sensor are arranged on the same gas circuit pipeline; an airflow distribution pipeline is arranged between the two flow sensors; the small-range flow sensor protection valve is arranged on the shunt pipeline and used for controlling the shunt pipeline to be opened and closed.
2. The filter membrane aperture analyzer with dual-pressure and dual-flow test gas path structure of claim 1, wherein the small-range pressure sensor protection valve is characterized in that the gas pressure in the gas path approaches the measurement limit of the small-range pressure sensor, and the small-range pressure sensor is connected out of the gas path to protect the small-range pressure sensor.
3. The filter membrane aperture analyzer with dual pressure and dual flow test gas path structure of claim 1, wherein said small-scale flow sensor protection valve opens when the gas flow in the gas path approaches the measurement limit of said small-scale flow sensor, thereby providing a flow splitting function, reducing the gas flow through said small-scale flow sensor, and providing a protection function for said small-scale flow sensor.
4. The filter membrane pore size analyzer with dual pressure and dual flow test gas path structure as claimed in claim 1 or 2, wherein the small range pressure sensor protection valve and the small range flow sensor protection valve are automatically controlled to open and close by software.
5. The filter membrane pore size analyzer with a dual-pressure and dual-flow test gas path structure as claimed in claim 1, wherein the wide range pressure sensor measures the gas pressure in the high pressure section, and the small range pressure sensor measures the gas pressure in the low pressure section, thereby realizing the high pressure and low pressure sectional test of the gas in the gas path, and expanding the test range and test precision of the gas pressure in the gas path.
6. The filter membrane aperture analyzer with dual pressure and dual flow test gas path structure as claimed in claim 1, wherein the wide range flow sensor measures a larger gas flow in the gas path, and the small range flow sensor measures a smaller gas flow in the gas path, so that a segmented test of the larger gas flow and the smaller gas flow is realized, and a test range and a test precision of the gas flow are improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820392654.7U CN208313769U (en) | 2018-03-22 | 2018-03-22 | A kind of filter sizes analyzer with double pressure and two-flow test gas circuit structure |
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| CN201820392654.7U CN208313769U (en) | 2018-03-22 | 2018-03-22 | A kind of filter sizes analyzer with double pressure and two-flow test gas circuit structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013395A (en) * | 2020-03-01 | 2020-04-17 | 贝士德仪器科技(北京)有限公司 | Filter membrane front end pressure control method and filter membrane aperture testing device |
| CN111141644A (en) * | 2020-02-28 | 2020-05-12 | 贝士德仪器科技(北京)有限公司 | Filter membrane aperture analyzer with liquid sealing pressure relief protection device |
| CN113504152A (en) * | 2021-07-01 | 2021-10-15 | 国网安徽省电力有限公司电力科学研究院 | SF based on shunting method6Method and device for measuring and calculating gas recovery rate of gas chamber |
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2018
- 2018-03-22 CN CN201820392654.7U patent/CN208313769U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141644A (en) * | 2020-02-28 | 2020-05-12 | 贝士德仪器科技(北京)有限公司 | Filter membrane aperture analyzer with liquid sealing pressure relief protection device |
| CN111013395A (en) * | 2020-03-01 | 2020-04-17 | 贝士德仪器科技(北京)有限公司 | Filter membrane front end pressure control method and filter membrane aperture testing device |
| CN113504152A (en) * | 2021-07-01 | 2021-10-15 | 国网安徽省电力有限公司电力科学研究院 | SF based on shunting method6Method and device for measuring and calculating gas recovery rate of gas chamber |
| CN113504152B (en) * | 2021-07-01 | 2024-05-28 | 国网安徽省电力有限公司电力科学研究院 | SF based on shunt method6Method and device for measuring and calculating gas recovery rate of gas chamber |
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