CN110887768B - Cleaning kerosene cleanliness detection method - Google Patents
Cleaning kerosene cleanliness detection method Download PDFInfo
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- CN110887768B CN110887768B CN201811051244.7A CN201811051244A CN110887768B CN 110887768 B CN110887768 B CN 110887768B CN 201811051244 A CN201811051244 A CN 201811051244A CN 110887768 B CN110887768 B CN 110887768B
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- filter membrane
- pvdf filter
- microporous pvdf
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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
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
Abstract
The invention relates to the technical field of cleaning kerosene cleanliness detection, in particular to a cleaning kerosene cleanliness detection method. The invention discloses a method for detecting cleanliness lack in cleaning, which comprises the following six steps: the method comprises the steps of preparing, filtering to-be-detected cleaned kerosene, extracting pollutants, filtering an extraction solution, weighing a filter membrane and calculating cleanliness.
Description
Technical Field
The invention relates to the technical field of cleaning kerosene cleanliness detection, in particular to a cleaning kerosene cleanliness detection method.
Background
In the production process of the bearing, the cleaning kerosene is easy to be mixed with antirust oil, super essential oil, cutting fluid and other liquids in the using process, so that the color of the cleaning kerosene can be gradually deepened along with the increase of the mixed liquid, the existing detection method for the cleanliness of the oil used is mainly evaluated through filtration according to the JB/T10560 method, but a filter membrane obtained through filtration in the mode contains particle impurities and also has a layer of dark-colored oil marks, the oil marks seriously affect the accuracy of weight analysis of particles, and meanwhile, the oil marks are wrongly recorded as the particle impurities through automatic scanning counting, so that the accuracy of particle counting is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the cleaning kerosene cleanliness detection method, which can accurately evaluate the cleanliness of particle impurities in the used oil by a gravimetric method and can also improve the particle counting accuracy of an automatic counter.
The invention provides a cleaning kerosene cleanliness detection method, which comprises the following steps:
preparing, namely filtering a cleaning solvent by using a first microporous PVDF (polyvinylidene fluoride) filter membrane, cleaning a beaker, tweezers and a weighing bottle by using the filtered cleaning solvent, oscillating the cleaning kerosene to be detected, and obtaining 100ml of cleaning kerosene to be detected through a measuring cylinder;
step two, filtering the to-be-cleaned kerosene, taking out a second microporous PVDF filter membrane by using tweezers, pressing the second microporous PVDF filter membrane in a microporous filter through a funnel, pouring the to-be-cleaned kerosene into the funnel, completely washing the residual to-be-cleaned kerosene in the measuring cylinder by using a cleaning solvent, pouring the residual to-be-cleaned kerosene into the funnel, covering a funnel cover, vacuumizing and filtering, when the to-be-cleaned kerosene in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom in the same spiral direction by using a clean solvent until the pollutants in the to-be-cleaned kerosene are completely deposited on the second microporous PVDF filter membrane, and finally performing vacuum filtration until the second microporous PVDF filter membrane is dried;
step three, extracting pollutants, namely taking down the second microporous PVDF filter membrane by using clean forceps, placing the second microporous PVDF filter membrane in a beaker filled with a cleaning solvent, and oscillating the second microporous PVDF filter membrane in ultrasonic waves for 10 seconds to obtain an extraction solution;
step four, filtering the extraction solution, taking out the third microporous PVDF filter membrane by using tweezers, placing the third microporous PVDF filter membrane into a weighing bottle, placing the third microporous PVDF filter membrane into a drying box at 110 +/-5 ℃ for drying for 30min, weighing the initial weight of the third microporous PVDF filter membrane by using balance and recording, pressing the third microporous PVDF filter membrane into a microporous filter by using a clean funnel, pouring the extraction solution obtained in the previous step into the funnel, washing the residual extraction solution in the beaker by using a cleaning solvent and pouring the residual extraction solution into the funnel, covering a funnel cover, performing vacuum filtration, when the extraction solution in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom by using the cleaning solvent in the same spiral direction until the pollutants in the extraction solution are completely deposited on the third microporous PVDF filter membrane, and finally performing vacuum filtration until the third microporous PVDF filter membrane is dried;
weighing the filter membrane, taking down the third microporous PVDF filter membrane by using tweezers, placing the third microporous PVDF filter membrane in a weighing bottle, placing the third microporous PVDF filter membrane in a drying oven at 110 +/-5 ℃ for drying for 30min, weighing the final weight of the third microporous PVDF filter membrane by using a balance, recording, placing the third microporous PVDF filter membrane in a beaker filled with a cleaning solvent, oscillating for 10 seconds in ultrasonic waves to obtain an extraction solution, and abandoning the third microporous PVDF filter membrane;
and sixthly, calculating the cleanliness, and repeating the fourth step and the fifth step until no visible oil mark exists on the third microporous PVDF filter membrane, and performing difference on the final weight and the initial weight to obtain the cleanliness.
The invention is further set that the first microporous PVDF filter membrane adopts a pore size of 0.45 μm, and the second microporous PVDF filter membrane and the third microporous PVDF filter membrane both adopt a pore size of 1.2 μm.
The invention is further arranged that in the second step, before the second microporous PVDF filter membrane is loaded into the microporous filter, the upper surface of the second microporous PVDF filter membrane is washed by clean water.
The invention is further configured in the fourth step, before the third microporous PVDF filter membrane is filled into the microporous weighing bottle, the upper surface of the third microporous PVDF filter membrane is washed by clear water.
The beneficial effect who so sets up is: by adopting the scheme, the antirust oil, the superfine oil and the cutting fluid mixed in the cleaning kerosene to be detected can be absorbed through the microporous PVDF filter membranes after the filtration by adopting the multi-channel microporous PVDF filter membranes, so that the oil marks are obviously lightened, the counting accuracy of automatic scanning counting cannot be influenced when the oil marks are invisible to naked eyes, meanwhile, the cleanliness of particle impurities in dirty oil can be accurately evaluated by a gravimetric method, and the size and the quantity of the particle impurities can be more accurately measured by the optimized method. The oil consumption is periodically replaced by measuring the cleanliness of the oil consumption, so that the cleanliness control level of the product is improved, and the product quality is finally improved. The method has the advantages that the cleanliness of the oil in use can be accurately evaluated, the detection cost is low, the popularization and the use are facilitated, and the product cleanliness problem is favorably monitored. The method can accurately measure the weight and particle size distribution of impurities in the cleanliness of the dark kerosene or the bearing with the dark oil, and avoids the defect of large error in the cleanliness of the kerosene for detecting dark colors in the traditional method. In this scheme, the in-process of step four and step five is repeated, the third micropore PVDF filter membrane that adopts at every turn all is different from the last third micropore PVDF filter membrane, effectively avoid the production of mimeograph, guarantee the absorption to the inclusion, do poor initial heavy and final heavy and refer to the initial heavy and the final heavy of the filter membrane that used last time recently, improve the precision that detects, wash the upper surface through the clear water when the micropore PVDF filter membrane is installed, can improve the result of use of filter membrane, better filter effect has.
Drawings
FIG. 1 is a block flow diagram of the present invention;
FIG. 2 is a diagram showing the observation of a filter membrane after filtration by a conventional method under a 100X-fold microscope;
FIG. 3 is a diagram showing the observation of the filter membrane after filtration by the detection method in the example of the present invention under a 100X-fold microscope.
Detailed Description
The invention discloses a cleaning kerosene cleanliness detection method, which comprises the following steps:
101, preparing, namely filtering a cleaning solvent by using a first microporous PVDF filter membrane with the aperture of 0.45 mu m, cleaning a beaker, a pair of tweezers and a weighing bottle by using the filtered cleaning solvent, oscillating the cleaning kerosene to be detected, and obtaining 100ml of cleaning kerosene to be detected through a measuring cylinder;
102, filtering the to-be-cleaned kerosene, taking out a second microporous PVDF filter membrane with the aperture of 1.2 mu m by using tweezers, washing the upper surface of the second microporous PVDF filter membrane, pressing the second microporous PVDF filter membrane into a microporous filter through a funnel, pouring the to-be-cleaned kerosene into the funnel, pouring the residual to-be-cleaned kerosene in the measuring cylinder into the funnel through a cleaning solvent without washing, covering a funnel cover, vacuumizing and filtering, when the to-be-cleaned kerosene in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom in the same spiral direction through the cleaning solvent until the pollutants in the to-be-cleaned kerosene are completely deposited on the second microporous PVDF filter membrane, and finally performing vacuum suction filtration until the second microporous PVDF filter membrane is dried;
103, extracting pollutants, namely taking down the second microporous PVDF filter membrane by using clean forceps, placing the second microporous PVDF filter membrane in a beaker filled with a cleaning solvent, and oscillating the second microporous PVDF filter membrane in ultrasonic waves for 10 seconds to obtain an extraction solution;
104, filtering the extraction solution, taking out a third microporous PVDF filter membrane with the aperture of 1.2 mu m by using tweezers, washing the upper surface of the third microporous PVDF filter membrane, then placing the third microporous PVDF filter membrane into a weighing bottle, placing the third microporous PVDF filter membrane into a drying oven at 110 +/-5 ℃ for drying for 30min, measuring the initial weight of the third microporous PVDF filter membrane by using balance and recording, pressing the third microporous PVDF filter membrane into a microporous filter by using a clean funnel, pouring the extraction solution obtained in the previous step into the funnel, washing the residual extraction solution in the beaker by using a cleaning solvent, pouring the residual extraction solution into the funnel, covering the funnel cover, vacuumizing and filtering, when the extraction solution in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom in the same spiral direction by using the cleaning solvent until the pollutants in the extraction solution are completely deposited on the third microporous PVDF filter membrane, and finally drying the third microporous PVDF filter membrane by vacuum suction filtration;
and 106, calculating the cleanliness, and repeating the step 104 and the step 105 until no visible oil mark exists on the third microporous PVDF filter membrane, and performing difference on the final weight and the initial weight to obtain the cleanliness.
The above-mentioned embodiments are only preferred embodiments of the present invention, and therefore, the scope of the present invention should not be limited by the above-mentioned embodiments, and therefore, equivalent changes, such as equivalent products using similar processes and similar structures, made by the claims of the present invention, are also included in the scope of the present invention.
Claims (4)
1. A cleaning kerosene cleanliness detection method is characterized by comprising the following steps:
preparing, namely filtering a cleaning solvent by using a first microporous PVDF (polyvinylidene fluoride) filter membrane, cleaning a beaker, tweezers and a weighing bottle by using the filtered cleaning solvent, oscillating the cleaning kerosene to be detected, and measuring 100ml of cleaning kerosene to be detected by using an excessive cylinder;
step two, filtering the to-be-detected cleaned kerosene, taking out a second microporous PVDF filter membrane by using tweezers, pressing the second microporous PVDF filter membrane in a microporous filter through a funnel, pouring the to-be-detected cleaned kerosene into the funnel, washing the residual to-be-detected cleaned kerosene in the measuring cylinder completely through a cleaning solvent, pouring the cleaned kerosene into the funnel, covering a funnel cover, vacuumizing and filtering, when the to-be-detected cleaned kerosene in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom in the same spiral direction through the cleaning solvent until the pollutants in the to-be-detected cleaned kerosene are completely deposited on the second microporous PVDF filter membrane, and finally performing vacuum filtration until the second microporous PVDF filter membrane is dried;
step three, extracting pollutants, namely taking down the second microporous PVDF filter membrane by using clean forceps, placing the second microporous PVDF filter membrane in a beaker filled with a cleaning solvent, and oscillating for 10 seconds by adopting ultrasonic waves to obtain an extraction solution;
step four, filtering the extraction solution, taking out the third microporous PVDF filter membrane by using tweezers, placing the third microporous PVDF filter membrane into a weighing bottle, placing the third microporous PVDF filter membrane into a drying box at 110 +/-5 ℃ for drying for 30min, weighing the initial weight of the third microporous PVDF filter membrane by using balance and recording, pressing the third microporous PVDF filter membrane into a microporous filter by using a clean funnel, pouring the extraction solution obtained in the previous step into the funnel, washing the residual extraction solution in the beaker by using a cleaning solvent and pouring the residual extraction solution into the funnel, covering a funnel cover, vacuumizing and filtering, when the extraction solution in the funnel is about to be filtered out, washing the inner wall of the funnel from top to bottom by using the cleaning solvent in the same spiral direction until the pollutants in the extraction solution are completely deposited on the third microporous PVDF filter membrane, and finally performing vacuum filtration on the third microporous PVDF filter membrane for drying;
weighing the filter membrane, taking down the third microporous PVDF filter membrane by using tweezers, placing the third microporous PVDF filter membrane in a weighing bottle, placing the third microporous PVDF filter membrane in a drying oven at 110 +/-5 ℃ for drying for 30min, weighing the final weight of the third microporous PVDF filter membrane by using a balance, recording, placing the third microporous PVDF filter membrane in a beaker filled with a cleaning solvent, oscillating for 10 seconds in ultrasonic waves to obtain an extraction solution, and abandoning the third microporous PVDF filter membrane;
and sixthly, calculating the cleanliness, and repeating the fourth step and the fifth step until no visible oil mark exists on the third microporous PVDF filter membrane, and performing difference on the final weight and the initial weight to obtain the cleanliness.
2. The cleaning kerosene cleanliness detection method according to claim 1, characterized in that: the first microporous PVDF filter membrane adopts a pore diameter of 0.45 mu m, and the second microporous PVDF filter membrane and the third microporous PVDF filter membrane both adopt a pore diameter of 1.2 mu m.
3. The cleaning kerosene cleanliness detection method according to claim 1 or 2, characterized in that: and in the second step, before the second microporous PVDF filter membrane is loaded into the microporous filter, the upper surface of the second microporous PVDF filter membrane is washed by clear water.
4. The cleaning kerosene cleanliness detection method according to claim 1 or 2, characterized in that: and in the fourth step, before the third microporous PVDF filter membrane is filled into the microporous weighing bottle, the upper surface of the third microporous PVDF filter membrane is washed by clear water.
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| US6064480A (en) * | 1998-02-27 | 2000-05-16 | Csi Technology, Inc. | Method of optical particle counting for water mixed lubricant |
| CN104470613A (en) * | 2012-06-19 | 2015-03-25 | 斯派超科学股份有限公司 | Filtration particle quantifier |
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Address after: 325000 Binhai five road 515, Wenzhou economic and Technological Development Zone, Zhejiang Applicant after: C&U Co.,Ltd. Applicant after: SHANGHAI C&U GROUP Co.,Ltd. Applicant after: ANHUI PIFU BEARING CO.,LTD. Applicant after: WUHU ZHIYOU BEARING CO.,LTD. Address before: 325000 Binhai five road 515, Wenzhou economic and Technological Development Zone, Zhejiang Applicant before: C & U Group Ltd. Applicant before: SHANGHAI C&U GROUP Co.,Ltd. Applicant before: ANHUI PIFU BEARING Co.,Ltd. Applicant before: WUHU ZHIYOU BEARING Co.,Ltd. |
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Address after: 325000 Binhai five road 515, Wenzhou economic and Technological Development Zone, Zhejiang Patentee after: C&U Co.,Ltd. Patentee after: SHANGHAI C&U GROUP Co.,Ltd. Patentee after: Anhui Pifu Bearing Co.,Ltd. Patentee after: WUHU ZHIYOU BEARING CO.,LTD. Address before: 325000 Binhai five road 515, Wenzhou economic and Technological Development Zone, Zhejiang Patentee before: C&U Co.,Ltd. Patentee before: SHANGHAI C&U GROUP Co.,Ltd. Patentee before: ANHUI PIFU BEARING CO.,LTD. Patentee before: WUHU ZHIYOU BEARING CO.,LTD. |
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