CN211886273U - Gas-liquid displacement test filter membrane aperture analyzer - Google Patents
Gas-liquid displacement test filter membrane aperture analyzer Download PDFInfo
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- CN211886273U CN211886273U CN202020230549.0U CN202020230549U CN211886273U CN 211886273 U CN211886273 U CN 211886273U CN 202020230549 U CN202020230549 U CN 202020230549U CN 211886273 U CN211886273 U CN 211886273U
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Abstract
The gas-liquid displacement test filter membrane aperture analyzer includes: the device comprises an automatic control system, an automatic adjustable pressure stabilizing valve, a low pressure sensor protective valve, a high pressure sensor, a low flow sensor protective valve and a high flow sensor; the automatic control system is in circuit connection with the low-pressure sensor, the low-pressure sensor protection valve, the high-pressure sensor, the low-flow sensor protection valve and the high-flow sensor; the low-pressure sensor is connected with the cavity at the front end of the filter membrane through a low-pressure sensor protection valve; the high pressure sensor is connected with a cavity gas circuit at the front end of the filter membrane; the low-flow sensor is connected with the cavity at the rear end of the filter membrane through the low-flow sensor protection valve; the high-flow sensor is connected with the cavity gas circuit at the rear end of the filter membrane. The high pressure sensor and the low pressure sensor are matched with the high flow sensor and the low flow sensor, so that the test result is more accurate.
Description
Technical Field
The utility model relates to a filter membrane aperture analysis test field, concretely relates to gas-liquid displacement test filter membrane aperture's analysis appearance.
Background
After the capillary channel is soaked and filled by the soaking liquid, the soaking liquid climbs a certain height along the wall of the pore due to the existence of capillary phenomenon and surface tension, and the pressure difference P formed by the height and the pore diameter D meet the Washburn formula: p =4cos θ γ/D, where θ is the contact angle of the immersion liquid with the pore walls and γ is the surface tension between the immersion liquid and the displacement gas. Taking a certain membrane material as an example, the membrane is fully wetted by a liquid capable of infiltrating with the membrane, and the infiltrating liquid is bound in pores of the membrane due to the existence of surface tension; gradually increasing gas pressure is applied to one side of the membrane, and when the gas pressure reaches a pressure greater than that generated by the surface tension of the immersion liquid in a certain aperture, the immersion liquid in the aperture is pushed out by the gas; since the smaller the pore diameter is, the higher the pressure generated by surface tension is, the higher the gas pressure to be applied for pushing out the impregnating solution therein is; similarly, it can be seen that the immersion liquid in the hole with the largest aperture is firstly pushed out to allow the gas to permeate, and then as the pressure increases, the aperture is gradually pushed out from large to small to allow the gas to permeate until all the holes are opened, so as to achieve the same permeability as that of the dry film. After the holes are opened, gas will flow through the holes, and a flow sensor is placed behind the membrane to monitor the flow of gas through the membrane. The diameter of the pores of the membrane and the number of diameters are calculated from the relationship of pressure and flow in real time.
SUMMERY OF THE UTILITY MODEL
According to the above principle, the utility model provides an analysis appearance in gas-liquid displacement test filter membrane aperture, include: the device comprises an automatic control system, an automatic adjustable pressure stabilizing valve, a low pressure sensor protecting valve, a high pressure sensor, a low flow sensor protecting valve and a high flow sensor.
And the automatic control system is in circuit connection with the low-pressure sensor, the low-pressure sensor protection valve, the high-pressure sensor, the low-flow sensor protection valve and the high-flow sensor.
The low-pressure sensor is connected with the cavity at the front end of the filter membrane through the low-pressure sensor protection valve; and the air inlet of the low-pressure sensor protection valve is connected with the cavity at the front end of the filter membrane, and the air outlet of the low-pressure sensor protection valve is connected with the low-pressure sensor.
The high pressure sensor is connected with the cavity gas circuit at the front end of the filter membrane.
The low-flow sensor is connected with the cavity at the rear end of the filter membrane through the low-flow sensor protection valve; the air inlet of the low-flow sensor protection valve is connected with the cavity at the rear end of the filter membrane, and the air outlet of the low-flow sensor protection valve is connected with the low-flow sensor.
And the high-flow sensor is connected with a cavity gas circuit at the rear end of the filter membrane.
The utility model has the advantages that the pressure at the front end of the filter membrane can be accurately controlled, and the accuracy of the filter membrane aperture test can not be influenced even if the cavity at the front end of the filter membrane has slight air leakage; meanwhile, the high-pressure sensor and the low-pressure sensor are matched with each other, and the high-flow sensor and the low-flow sensor are used, so that the test result is more accurate.
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 schematic structural diagram of an analyzer for gas-liquid displacement testing of the aperture of a filter membrane;
in the figure, 1, an automatic control system, 2, a steel cylinder, 3, an automatic regulating pressure stabilizing valve, 4, a low-pressure sensor, 5, a low-pressure sensor protecting valve, 6, a high-pressure sensor, 7, a test fixture, 8, a filter membrane, 9, a low-flow sensor, 10, a low-flow sensor protecting valve and 11, a high-flow sensor 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.
The utility model provides an analysis appearance in gas-liquid displacement test filter membrane aperture, include: the automatic control system comprises an automatic control system 1, an automatic adjustable pressure maintaining valve 3, a low pressure sensor 4, a low pressure sensor protection valve 5, a high pressure sensor 6, a low flow sensor 9, a low flow sensor protection valve 10 and a high flow sensor 11.
The automatic control system 1 is in circuit connection with the low-pressure sensor 4, the low-pressure sensor protection valve 5, the high-pressure sensor 6, the low-flow sensor 9, the low-flow sensor protection valve 10 and the high-flow sensor 11, and the automatic control system 1 controls the actions of the hardware by sending different commands.
The low-pressure sensor 4 is connected with the cavity at the front end of the filter membrane 8 through the low-pressure sensor protection valve 5; the air inlet of the low-pressure sensor protection valve 5 is connected with the cavity at the front end of the filter membrane 8, and the air outlet of the low-pressure sensor protection valve is connected with the low-pressure sensor 4; the high pressure sensor 6 is connected with a cavity at the front end of the filter membrane 8 through a gas circuit. When the pressure in the cavity at the front end of the filter membrane 8 is small, the automatic control system 1 controls the low-pressure sensor protection valve 5 to be opened, and at the moment, the low-pressure sensor 4 tests the pressure at the front end of the filter membrane 8 and transmits a test value to the automatic control system 1. When the pressure at the front end of the filter membrane 8 is higher, the automatic control system 1 controls the low-pressure sensor protection valve 5 to be closed, and at the moment, the high-pressure sensor 6 tests the pressure at the front end of the filter membrane 8 and transmits the test value to the automatic control system 1.
The low-flow sensor 9 is connected with a cavity at the rear end of the filter membrane 8 through the low-flow sensor protection valve 10; the air inlet of the low-flow sensor protection valve 10 is connected with the cavity at the rear end of the filter membrane 8, and the air outlet of the low-flow sensor protection valve is connected with the low-flow sensor 9. And the high-flow sensor 11 is connected with a cavity gas circuit at the rear end of the filter membrane 8. When the pressure at the rear end of the filter membrane 8 is small, the automatic control system 1 controls the low-flow sensor protection valve 10 to be opened, and at the moment, the low-flow sensor 9 tests the flow at the rear end of the filter membrane 8 and transmits the test value to the automatic control system 1. When the flow at the rear end of the filter membrane 8 is large, the automatic control system 1 controls the low-flow sensor protection valve 10 to be closed, and at the moment, the high-flow sensor 11 tests the flow at the rear end of the filter membrane 8 and transmits the test value to the automatic control system 1.
The utility model discloses the during operation, automatic control system 1 controls the work of automatic adjustable surge damping valve 3, in the gas entering filter membrane 8 front end's of automatic adjustable surge damping valve 3 control steel bottle 2 cavity, make the pressure in this cavity cascaded increase of mode of a P at every turn. Along with the pressure increase in the cavity of the front end of the filter membrane 8, the infiltration liquid in the cavity of the filter membrane 8 is discharged, the gas flows out of the hole of the filter membrane 8, the pressure inside the cavity of the front end of the filter membrane 8 is tested by the low-pressure sensor 4 at the moment, and then the automatic control system 1 is used for controlling the pressure according to the Washburn formula: p =4cos θ γ/D, (P is pressure, D is pore diameter, θ is contact angle of the immersion liquid with the pore wall, γ is surface tension between the immersion liquid and the displacement gas) to calculate pore size; at the same time, the low-flow sensor 9 measures the flow at the rear end of the filter membrane 8 to calculate the number of pore diameters at that pressure. Along with the increase of the pressure in the cavity at the front end of the filter membrane 8 and the gradual increase of the holes to be discharged, the flow at the rear end of the filter membrane 8 is also gradually increased, at the moment, the low-pressure sensor protection valve 5 and the low-flow sensor protection valve 10 are closed, the pressure in the cavity at the front end of the filter membrane and the flow at the rear end of the filter membrane are measured by the high-pressure sensor 6 and the high-flow sensor 11, and the test values are transmitted to the automatic control system 1 to calculate the pore size and the pore size distribution.
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 (3)
1. The analyzer for testing the aperture of the filter membrane by gas-liquid displacement comprises an automatic control system, an automatic adjustable pressure stabilizing valve, a low-pressure sensor protection valve, a high-pressure sensor, a low-flow sensor protection valve and a high-flow sensor; the automatic control system is connected with the low-pressure sensor, the low-pressure sensor protection valve, the high-pressure sensor, the low-flow sensor protection valve and the high-flow sensor through circuits; the low-pressure sensor is connected with the cavity at the front end of the filter membrane through the low-pressure sensor protection valve; the high pressure sensor is connected with a cavity gas circuit at the front end of the filter membrane; the low-flow sensor is connected with the cavity at the rear end of the filter membrane through the low-flow sensor protection valve; and the high-flow sensor is connected with a cavity gas circuit at the rear end of the filter membrane.
2. The analyzer for gas-liquid displacement testing of the pore diameter of the filter membrane according to claim 1, wherein the gas inlet of the low pressure sensor protection valve is connected with the cavity at the front end of the filter membrane, and the gas outlet thereof is connected with the low pressure sensor.
3. The gas-liquid displacement test filter membrane pore size analyzer according to claim 1, wherein the gas inlet of the low-flow sensor protection valve is connected with the cavity at the rear end of the filter membrane, and the gas outlet thereof is connected with the low-flow sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020230549.0U CN211886273U (en) | 2020-03-01 | 2020-03-01 | Gas-liquid displacement test filter membrane aperture analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020230549.0U CN211886273U (en) | 2020-03-01 | 2020-03-01 | Gas-liquid displacement test filter membrane aperture analyzer |
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| CN211886273U true CN211886273U (en) | 2020-11-10 |
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Cited By (1)
| 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 |
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2020
- 2020-03-01 CN CN202020230549.0U patent/CN211886273U/en active Active
Cited By (1)
| 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 |
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