CN107843530B - Filter element detection device with small error and measurement method - Google Patents
Filter element detection device with small error and measurement method Download PDFInfo
- Publication number
- CN107843530B CN107843530B CN201610826822.4A CN201610826822A CN107843530B CN 107843530 B CN107843530 B CN 107843530B CN 201610826822 A CN201610826822 A CN 201610826822A CN 107843530 B CN107843530 B CN 107843530B
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- air
- filter element
- air pipe
- liquid
- lifting mechanism
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- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 238000000691 measurement method Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000001105 regulatory effect Effects 0.000 claims abstract description 26
- 238000009423 ventilation Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000003028 elevating effect Effects 0.000 description 5
- 210000003437 trachea Anatomy 0.000 description 5
- 239000004831 Hot glue Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 239000012085 test solution Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
-
- 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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a filter element detection device with small error and a measurement method thereof, comprising a liquid storage tank, wherein a test liquid and a lifting mechanism for fixing a filter element to be detected are arranged in the liquid storage tank, the detection device is connected with ventilation equipment, the ventilation equipment comprises an air source and an air pipe, the air inlet end of the air pipe is connected with the air source, the air outlet end of the air pipe is provided with an air outlet, the air outlet is connected with the lifting mechanism, and the air inlet end of the air pipe is sequentially provided with a pressure regulating valve, a pressure gauge and a ventilation control switch. Compared with the prior art, the device is provided with the lifting mechanism, and is convenient to detect and operate. Before testing, the filter element to be tested is soaked in the test liquid, so that capillary holes of filter paper of the filter element are permeated by the test liquid, the filter paper of the filter element is ensured to be totally wet, and the phenomenon of false bubbles during measurement is avoided; the lifting mechanism is lifted, the air outlet is exposed out of the liquid level, residual liquid in the air pipe is discharged, the pressure influence caused by the liquid in the air pipe is eliminated, the accuracy of measured values is ensured, the test error is small, and the detection method is accurate.
Description
Technical Field
The invention relates to a filter element detection device, in particular to a filter element detection device with small error and a measurement method.
Background
In industrial production, in order to detect the integrity and tightness of an object, the object is generally immersed in a liquid, a certain air pressure is input into the object, the sealing performance of the object is evaluated by observing whether the surface of the object has a bubble phenomenon or not, and the position and the maximum aperture point of the bubble can be observed, and the method is called a bubble method. At present, the detection of the filter element structure adopts a bubble method to distinguish whether the sealing performance is good or bad after the hot melt adhesive, polyurethane and filter paper are bonded, whether the filter paper is damaged or not in processing, and whether the pressure value of the first bubble of the filter element meets the requirements or not is detected.
The pressure of the air bubble is determined according to the reading of the pressure gauge, but in the ventilation process, the air pipe usually remains test liquid, the air outlet of the air pipe is positioned below the liquid level, a certain rated pressure exists, the accuracy of a test result is affected, and the existing device and the measuring method have larger errors and cannot truly reflect the maximum aperture numerical value of the filter element.
Disclosure of Invention
The invention aims to solve the problems and provide a filter element detection device and a measurement method with small measurement error.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a filter core detection device that error is little, includes the reservoir, the reservoir in be equipped with test liquid, the reservoir in be equipped with the elevating system of fixed measured filter core, detection device connect ventilation equipment, this ventilation equipment includes air supply and trachea, tracheal one end of admitting air is connected the air supply, tracheal one end of giving vent to anger is equipped with the gas outlet, the gas outlet be connected with elevating system, tracheal one end of admitting air be equipped with pressure regulating valve, manometer and with the ventilation control switch of atmospheric communication in proper order.
The lifting mechanism is of a platform structure capable of moving up and down.
The viscosity and density of the test solution are required to meet the requirements or the specified brands are adopted, and the test solution with the market brand name Castrol AS58 is preferably adopted.
The pressure regulating valve comprises a rough regulating valve and a fine regulating valve.
The air source is compressed air.
The measuring method of the filter element detecting device specifically comprises the following steps:
(a) Soaking the filter element to be tested in the test liquid to ensure that the filter paper of the filter element is completely wet;
(b) Lifting the lifting mechanism to enable the air outlet of the air pipe to expose out of the liquid level, adjusting the pressure regulating valve to enable the air flow to empty the residual test liquid in the air pipe, ensuring that no test liquid exists in the air pipe, and returning the pressure regulating valve to zero;
(c) Fixing the infiltrated tested filter element on a table top of a lifting mechanism, and immersing the lifting mechanism and the tested filter element together below the liquid level of the test liquid;
(d) Observing whether the indication number of the pressure gauge is in a zero state, if pressure exists, opening a ventilation control switch to enable the air pipe to be communicated with the outside, removing internal pressure in the air pipe, ensuring that the indication number of the pressure gauge is zero, and removing the internal pressure so as not to cause superposition of the pressure applied during the test;
(e) Closing the ventilation control switch, adjusting the pressure regulating valve, inflating the tested filter element, stopping inflating when the tested filter element generates a first bubble, recording the pressure value of the pressure gauge when the first bubble is generated, and entering a subsequent test or a test end point.
The soaking time in the step (a) is 1-5min.
The distance between the upper surface of the filter element in the step (c) and the liquid level is 9-15mm.
When the device is used, enough test liquid is filled in the liquid storage tank, the liquid level is higher than the tested filter element, the tested filter element is fixed on the lifting mechanism, the upper surface of the filter element keeps a certain height from the liquid level, the pressure regulating valve is opened, the air flow of the air source is continuously output at the air outlet through the air pipe diversion, all air bubbles are binded on the inner surface of filter paper of the filter element, the air flow is slowly regulated and increased, the air pressure on the inner side of the filter element is continuously increased, the display value of the pressure gauge is synchronously increased, when the air pressure reaches the pressure which is higher than the pressure generated by the surface tension of the test liquid in a certain aperture of the filter element, the test liquid in the aperture is pushed out by the air, the air bubble phenomenon is generated on the surface of the filter element, the air bubble phenomenon is called first air bubble, and the specific air bubble has the pressure value which is the display value of the pressure gauge. The first bubble point of the high-quality filter element can meet certain requirements because the first bubble pressure is on the surface of the filter paper, otherwise, the first bubble pressure value of the low-quality filter element is lower or bubbles appear at the bonding part of the hot melt adhesive or polyurethane and the filter paper because the surface of the filter paper is damaged or is not firmly bonded with the hot melt adhesive or the polyurethane.
Compared with the prior art, the invention provides the filter element detection device with small measurement error and the measurement method, and the device is provided with the lifting mechanism which can be adjusted up and down, so that the detection operation is convenient, and when in detection, the lifting mechanism is lifted, the air outlet is exposed out of the liquid level, and the residual liquid in the air pipe is discharged, so that the accuracy of data is ensured. Before testing, the filter element to be tested is soaked in the test liquid, so that capillary holes of filter paper of the filter element can be penetrated by the test liquid, the filter paper of the filter element is ensured to be totally moist, and a false bubble phenomenon is avoided during the measurement; the filter element to be tested is fixed on the lifting mechanism and immersed in the test liquid, whether the indication number of the pressure gauge is in a zero position state is observed, if pressure exists, the ventilation control switch is opened, the air pipe is communicated with the outside, the indication number of the pressure gauge is ensured to be zero, the internal pressure is eliminated so as not to cause superposition of the pressure applied during the test, and the error is further reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1-a liquid storage tank; 2-test liquid; 3-a lifting mechanism; 4-a filter element to be tested; 5-bubbling; 6-an air outlet; 7-trachea; 8-a pressure gauge; 9-a pressure regulating valve; 10-air source; 11-ventilation control switch.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Example 1
The utility model provides a filter core detection device that error is little, as shown in fig. 1, including reservoir 1, be equipped with test liquid 2 in the reservoir 1, still be equipped with the elevating system 3 of fixed measured filter core 4 in the reservoir 1, detection device connects ventilation equipment, this ventilation equipment includes air supply 10 and trachea 7, the air inlet one end of trachea 7 is connected air supply 10, the one end of giving vent to anger of trachea 7 is equipped with gas outlet 6, gas outlet 6 is connected with elevating system 3, the one end of admitting air of trachea 7 is equipped with pressure regulating valve 9 in proper order, manometer 10 and the ventilation control switch 11 with the atmosphere intercommunication, elevating system 3 is the platform structure that can reciprocate; the pressure regulating valve 9 can be provided with a rough regulating valve and a fine regulating valve; compressed air is adopted as an air source; the model of the test solution adopts Castrol AS58.
The specific detection is carried out by adopting the following steps:
(a) Soaking the filter element 4 to be tested in the test liquid 2 to ensure that the filter paper of the filter element is totally wetted for 1-5min;
(b) Lifting the lifting mechanism 3 to enable the air outlet of the air pipe 7 to be exposed out of the liquid level, regulating the pressure regulating valve 9 to enable the air flow to empty the residual test liquid in the air pipe 7, ensuring that no test liquid exists in the air pipe 7, and enabling the pressure regulating valve 8 to return to zero;
(c) The soaked filter element 4 to be tested is fixed on the table top of the lifting mechanism 3, the lifting mechanism 3 and the filter element 4 to be tested are immersed below the liquid level of the test liquid 2, and the distance between the upper surface of the filter element and the liquid level is 9-15mm, in the embodiment 10mm;
(d) Observing whether the indication number of the pressure gauge 8 is in a zero state, if pressure exists, opening the ventilation control switch 11 to enable the air pipe 7 to be communicated with the outside, and ensuring that the indication number of the pressure gauge 8 is zero;
(e) Closing the ventilation control switch 11, adjusting the pressure regulating valve 9, filling air to the tested filter element 4, stopping filling air and recording the pressure value of the pressure gauge 8 when the first air bubble 5 is generated by the tested filter element 4, and entering a subsequent test or reaching a test end point.
Claims (4)
1. The measuring method of the filter element detection device with small error is characterized in that the device comprises a liquid storage tank (1), a test liquid (2) is arranged in the liquid storage tank (1), a lifting mechanism (3) for fixing a filter element to be detected is arranged in the liquid storage tank (1), the detection device is connected with ventilation equipment, the ventilation equipment comprises an air source (10) and an air pipe (7), one air inlet end of the air pipe (7) is connected with the air source (10), one air outlet end of the air pipe is provided with an air outlet (6), the air outlet (6) is connected with the lifting mechanism (3), one air inlet end of the air pipe (7) is sequentially provided with a pressure regulating valve (9), a pressure gauge (8) and a ventilation control switch (11) communicated with the atmosphere, and the lifting mechanism (3) is of a platform structure capable of moving up and down;
the method specifically adopts the following steps:
(a) Soaking the filter element (4) to be tested in the test liquid (2) to ensure that the filter paper of the filter element is totally wet for 1-5min;
(b) Lifting the lifting mechanism (3) to enable the air outlet (6) of the air pipe to be exposed out of the liquid level, adjusting the pressure regulating valve (9) to enable the air flow to empty the residual test liquid in the air pipe (7), ensuring that no test liquid exists in the air pipe (7), and enabling the pressure regulating valve (9) to return to zero;
(c) Fixing the infiltrated tested filter element (4) on the table top of the lifting mechanism (3), immersing the lifting mechanism (3) together with the tested filter element (4) below the liquid level of the test liquid (2), wherein the distance between the upper surface of the tested filter element (4) and the liquid level is 9-15mm;
(d) Observing whether the indication number of the pressure gauge (8) is in a zero state, if pressure exists, opening a ventilation control switch (11) to enable the air pipe to be communicated with the outside, and ensuring that the indication number of the pressure gauge is zero;
(e) Closing the ventilation control switch (11), adjusting the pressure regulating valve (9), filling air to the tested filter element (4), stopping filling air when the tested filter element (4) generates a first bubble, reading the pressure value of the pressure gauge (8), and ending the test.
2. The method for measuring a small-error filter element detection device according to claim 1, wherein the test liquid (2) is a test liquid with a commercial brand of Castrol AS58.
3. A method for measuring a small error cartridge inspection device according to claim 1, wherein said pressure regulating valve (9) comprises a coarse pressure regulating valve and a fine pressure regulating valve.
4. A method of measuring a small error cartridge inspection device according to claim 1, wherein the air source (10) is compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610826822.4A CN107843530B (en) | 2016-09-18 | 2016-09-18 | Filter element detection device with small error and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610826822.4A CN107843530B (en) | 2016-09-18 | 2016-09-18 | Filter element detection device with small error and measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107843530A CN107843530A (en) | 2018-03-27 |
| CN107843530B true CN107843530B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610826822.4A Active CN107843530B (en) | 2016-09-18 | 2016-09-18 | Filter element detection device with small error and measurement method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843530B (en) * | 2016-09-18 | 2024-01-23 | 曼胡默尔滤清器（上海）有限公司 | Filter element detection device with small error and measurement method |
| CN108827557A (en) * | 2018-07-25 | 2018-11-16 | 苏州佐竹冷热控制技术有限公司 | A kind of compressed air type leakage amount measuring device for electricity |
| CN111879265B (en) * | 2020-07-29 | 2022-03-22 | 高博集团有限公司 | Filter element detection device and method for air filter |
| CN114061842B (en) * | 2021-11-11 | 2024-07-30 | 中国航发沈阳黎明航空发动机有限责任公司 | Oil filter element tightness testing device and testing method |
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| CN206095884U (en) * | 2016-09-18 | 2017-04-12 | 曼胡默尔滤清器（上海）有限公司 | Filter core detection device that error is little |
| CN107843530A (en) * | 2016-09-18 | 2018-03-27 | 曼胡默尔滤清器（上海）有限公司 | A kind of small filter check device of error and measuring method |
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2016
- 2016-09-18 CN CN201610826822.4A patent/CN107843530B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR482617A (en) * | 1916-08-21 | 1917-04-05 | Zahm Mfg Company | Method for testing filter bodies |
| CN101762251A (en) * | 2010-01-12 | 2010-06-30 | 大连工业大学 | Method and apparatus for measuring aperture of filter material |
| CN201707178U (en) * | 2010-06-02 | 2011-01-12 | 国核自仪系统工程有限公司 | Sealing test device for instruments and valves |
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| CN202171473U (en) * | 2011-08-11 | 2012-03-21 | 郑州贝龙液压技术有限公司 | Novel filter core detector |
| CN202735212U (en) * | 2012-06-25 | 2013-02-13 | 上海峰晟机械设备有限公司 | Pneumatic filter element bubble test clamp |
| CN203557589U (en) * | 2013-09-26 | 2014-04-23 | 兴源轮胎集团有限公司 | Vulcanizing machine |
| CN204159231U (en) * | 2014-05-16 | 2015-02-18 | 天津海普尔膜科技有限公司 | Interior pressure-pipe type film film pipe leakage detection apparatus |
| CN203965099U (en) * | 2014-07-07 | 2014-11-26 | 海南通用康力制药有限公司 | Integral filter integrity detection instrument |
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| CN107843530A (en) | 2018-03-27 |
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