CN113624657A - Measuring device for permeability of filter - Google Patents
Measuring device for permeability of filter Download PDFInfo
- Publication number
- CN113624657A CN113624657A CN202110866174.6A CN202110866174A CN113624657A CN 113624657 A CN113624657 A CN 113624657A CN 202110866174 A CN202110866174 A CN 202110866174A CN 113624657 A CN113624657 A CN 113624657A
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- China
- Prior art keywords
- galvanostat
- connecting pipe
- test
- pressure stabilizing
- sample
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000035699 permeability Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 239000011521 glass Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A measuring device for permeability of a filter belongs to a plurality of fields of water environment, traffic, chemistry and the like, and comprises a galvanostat, a galvanostat connecting pipe, a pressure stabilizing tank, a pressure gauge, a valve, a sample container and a sample connecting pipe; the method comprises the following steps of (1) finishing the test on a weighing device, closing a valve before the test starts, accessing flowing water flow above a galvanostat until water flows out from an overflow port and the water flow is stable, recording the total weight of the device before the test at the moment, opening the valve, starting the water flow to uniformly flow into a pressure stabilizing tank, recording the reading of a pressure gauge and the test starting time at the moment, finishing the test when the liquid level of the pressure stabilizing tank rises to the lower edge of a glass tube connected with the galvanostat and the pressure stabilizing tank, and recording the total weight of the device and the test finishing time at the moment; and calculating the volume of air according to the weight difference, water and the air density under corresponding pressure, and then calculating the permeability index of the filter. The device adopts a method of replacing a conventional air source with a constant water flow device, so that the pressure is more constant and controllable; and the accuracy of the filter permeability determination is improved.
Description
Technical Field
The invention relates to a device for measuring the permeability of a filter, belonging to the technical fields of water environment technology, traffic, chemistry and the like.
Background
The filter has comparatively extensive application in a plurality of fields, and the permeability has reflected the degree of compactness of filter, is one of the most important index of filter, and the air flow in the experimental process is measured to the permeability survey device commonly used at present adopts accurate air flowmeter more, but air flowmeter's stability is relatively poor at present, and the degree of accuracy is not enough, and air supply pressure receives multiple factor influence and generally also is unstable inadequately in the experimental process, influences the survey of filter permeability index, and current testing arrangement accuracy still has great promotion space.
The innovation points of the invention are now explained as follows:
the invention innovatively provides a method for replacing a conventional air source by a constant water flow device, so that the pressure is more constant and controllable; on the other hand, the gas volume is inversely calculated by adopting a weighing water quantity mode, so that the test gas flow is calculated, an air flow meter is replaced, the determination of the air flow is more accurate, the accuracy of the permeability determination of the filter is greatly improved on the whole, and the method has high popularization value.
Disclosure of Invention
The invention aims to provide a device for measuring the permeability of a filter, which improves a constant pressure device and a permeability measuring mode.
The main device of the invention comprises a galvanostat, a galvanostat connecting pipe, a pressure stabilizing groove, a pressure gauge, a valve, a sample container and the like.
The galvanostat is a glass cup body, the side edge of the galvanostat is provided with a high opening and a low opening, the low opening is connected with a galvanostat connecting pipe, the lower end of the galvanostat connecting pipe is connected with a voltage stabilizing groove, the high opening is an overflow port, stable water flow is injected into the galvanostat in the testing process, and the overflowing water flow flows out through the overflow port.
The galvanostat connecting pipe is made of glass, one set of device is provided with a plurality of galvanostat connecting pipes with different heights, the galvanostat connecting pipes with different heights are reloaded according to the requirement of measuring pressure, and the galvanostat connecting pipes, the galvanostat and the pressure stabilizing groove are in sealing connection.
The pressure stabilizing groove is made of glass, a sealing cover plate is arranged at the upper part of the pressure stabilizing groove, two connecting holes are reserved in the cover plate, one connecting hole is connected with the lower end of the galvanostat connecting pipe, and the other connecting hole is connected with the sample connecting pipe.
One end of the sample connecting pipe is connected into the pressure stabilizing groove, the other end of the sample connecting pipe is provided with a pressure gauge, the upper end branch pipe is provided with a valve which is connected with the sample container, and all connecting ports are sealed.
The valve is positioned on the sample connecting pipe and used for controlling the air switch.
The sample container is a through glass container with a large upper part and a small lower part, a sample is placed in the middle, and the lower end of the sample container is connected with the sample connecting pipe through a valve.
The device is completed on a weighing device in the test process, the valve is closed before the test is started, flowing water flow is connected to the upper portion of the constant flow device until water flows out from the overflow port and the water flow is stable, the total weight of the device before the test is recorded, the valve is opened, the water flow starts to uniformly flow into the pressure stabilizing groove, the reading of the pressure gauge and the test starting time are recorded, the test is finished when the liquid level of the pressure stabilizing groove rises to the lower edge of the glass tube connected with the constant flow device and the pressure stabilizing groove, and the total weight of the device and the test finishing time are recorded.
According to the weight difference between the front part and the rear part, the air volume can be calculated by combining water and the air density under corresponding pressure, and the permeability index of the filter can be calculated by combining the experiment.
Has the advantages that:
the invention provides a measuring device for the permeability of a filter, which replaces a common air flow meter by a water flow pressure stabilizing device, improves the stability of test conditions and the reliability of data, and simultaneously adjusts the air pressure by adopting a mode of adjusting the height of a constant flow device, thereby being more convenient and reliable; the device improves the permeability measuring mode, adopts the water weighing mode to reversely calculate the air volume, is more accurate and more economic relative to a gas flowmeter, is a good alternative mode, and has higher popularization and application values.
Drawings
Fig. 1 is a schematic structural view of a filter permeability measuring apparatus.
Detailed Description
The device comprises a galvanostat 1, a galvanostat connecting pipe 2, a pressure stabilizing groove 6, a pressure gauge 4, a valve 5, a sample container 3 and a sample connecting pipe 7.
The galvanostat is a glass cup body, the side edge of the glass cup body is provided with a high opening and a low opening, the low opening is connected with a galvanostat connecting pipe, the lower end of the galvanostat connecting pipe is connected with a voltage stabilizing groove, the high opening is an overflow port, stable water flow is injected into the galvanostat in the test process, and the overflowing water flow flows out through the overflow port.
The galvanostat connecting pipe is made of glass, one set of device is provided with a plurality of galvanostat connecting pipes with different heights, the galvanostat connecting pipes with different heights are reloaded according to the requirement of measuring pressure, and the galvanostat connecting pipes, the galvanostat and the pressure stabilizing groove are in sealing connection.
The pressure stabilizing groove is made of glass, a sealing cover plate is arranged at the upper part of the pressure stabilizing groove, two connecting holes are reserved in the cover plate, one connecting hole is connected with the lower end of the galvanostat connecting pipe, and the other connecting hole is connected with the sample connecting pipe.
One end of the sample connecting pipe is connected into the pressure stabilizing groove, the other end of the sample connecting pipe is provided with a pressure gauge, the upper end branch pipe is provided with a valve which is connected with the sample container, and all connecting ports are sealed.
The sample container is a glass container, a sample is placed in the middle of the sample container, and the lower end of the sample container is connected with the sample connecting pipe through a valve.
The device is completed on a weighing device in the test process, the valve is closed before the test is started, flowing water flow is connected to the upper portion of the constant flow device until water flows out from the overflow port and the water flow is stable, the total weight of the device before the test is recorded, the valve is opened, the water flow starts to uniformly flow into the pressure stabilizing groove, the reading of the pressure gauge and the test starting time are recorded, the test is finished when the liquid level of the pressure stabilizing groove rises to the lower edge of the glass tube connected with the constant flow device and the pressure stabilizing groove, and the total weight of the device and the test finishing time are recorded.
According to the weight difference of the water before and after the water is combined with the water density, the volume of the air discharged by the water can be calculated, and the permeability index of the filter can be calculated by combining the time used in the test.
Phi-permeability, cm3/(cm2·min)；
Q-flow, cm3/min；
P-pressure difference, Pa;
a-effective area of sample, cm2。
Claims (2)
1. A filter permeability measuring device, characterized in that: the device comprises a galvanostat, a galvanostat connecting pipe, a pressure stabilizing groove, a pressure gauge, a valve, a sample container and a sample connecting pipe;
the side of the galvanostat is provided with a high-low opening, the low opening is connected with a galvanostat connecting pipe, the lower end of the galvanostat connecting pipe is connected with a pressure stabilizing groove, and the high opening is an overflow port;
the galvanostat connecting pipe is hermetically connected with the galvanostat and the pressure stabilizing groove;
the upper part of the pressure stabilizing groove is provided with a sealing cover plate, the cover plate is provided with two connecting holes, one connecting hole is connected with the lower end of the galvanostat connecting pipe, and the other connecting hole is connected with the sample connecting pipe;
one end of the sample connecting pipe is connected with the pressure stabilizing groove, the other end of the sample connecting pipe is provided with a pressure gauge, the upper end branch pipe is provided with a valve to be connected with the sample container, and all connecting ports are sealed;
the valve is positioned on the sample connecting pipe and used for controlling the air switch;
the sample container is a through glass container with a large upper part and a small lower part, a sample is placed in the middle, and the lower end of the sample container is connected with the sample connecting pipe through a valve.
2. A method for applying the apparatus of claim 1, wherein: the device is completed on a weighing device in the test process, a valve is closed before the test is started, flowing water flow is connected to the upper part of a constant flow device until water flows out from an overflow port and the water flow is stable, the total weight of the device before the test is recorded at the moment, the valve is opened, the water flow starts to uniformly flow into a pressure stabilizing tank, the reading of a pressure gauge and the test starting time are recorded at the moment, the test is finished when the liquid level of the pressure stabilizing tank rises to the lower edge of a glass tube connected with the constant flow device and the pressure stabilizing tank, and the total weight of the device and the test finishing time are recorded at the moment; and calculating the volume of air according to the weight difference, water and the air density under corresponding pressure, and then calculating the permeability index of the filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866174.6A CN113624657A (en) | 2021-07-29 | 2021-07-29 | Measuring device for permeability of filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110866174.6A CN113624657A (en) | 2021-07-29 | 2021-07-29 | Measuring device for permeability of filter |
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| Publication Number | Publication Date |
|---|---|
| CN113624657A true CN113624657A (en) | 2021-11-09 |
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| CN202110866174.6A Pending CN113624657A (en) | 2021-07-29 | 2021-07-29 | Measuring device for permeability of filter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049055A (en) * | 1990-07-31 | 1991-02-06 | 李大勇 | The new method of fast measuring molding sand mould permeability |
| CN203824875U (en) * | 2014-04-10 | 2014-09-10 | 河海大学 | Simple and easy soil ventilation speed tester |
| CN205620278U (en) * | 2016-05-10 | 2016-10-05 | 核工业湖州工程勘察院 | Concrete coefficient measurement device that permeates water |
| CN109612899A (en) * | 2018-11-19 | 2019-04-12 | 中国矿业大学 | A kind of pressure correction formula gas permeability calculation method |
| CN211292480U (en) * | 2019-11-05 | 2020-08-18 | 吴江永盛混凝土有限公司 | Novel test of concrete permeability coefficient of permeating water device |
| CN112304836A (en) * | 2019-08-02 | 2021-02-02 | 长江水利委员会长江科学院 | Portable small-flow constant-pressure test water supply device |
| CN216082416U (en) * | 2021-07-29 | 2022-03-18 | 交通运输部公路科学研究所 | Measuring device for permeability of filter |
-
2021
- 2021-07-29 CN CN202110866174.6A patent/CN113624657A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049055A (en) * | 1990-07-31 | 1991-02-06 | 李大勇 | The new method of fast measuring molding sand mould permeability |
| CN203824875U (en) * | 2014-04-10 | 2014-09-10 | 河海大学 | Simple and easy soil ventilation speed tester |
| CN205620278U (en) * | 2016-05-10 | 2016-10-05 | 核工业湖州工程勘察院 | Concrete coefficient measurement device that permeates water |
| CN109612899A (en) * | 2018-11-19 | 2019-04-12 | 中国矿业大学 | A kind of pressure correction formula gas permeability calculation method |
| CN112304836A (en) * | 2019-08-02 | 2021-02-02 | 长江水利委员会长江科学院 | Portable small-flow constant-pressure test water supply device |
| CN211292480U (en) * | 2019-11-05 | 2020-08-18 | 吴江永盛混凝土有限公司 | Novel test of concrete permeability coefficient of permeating water device |
| CN216082416U (en) * | 2021-07-29 | 2022-03-18 | 交通运输部公路科学研究所 | Measuring device for permeability of filter |
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