CN108414390B - Method for testing decontamination self-escaping performance of insulating cleaning agent - Google Patents
Method for testing decontamination self-escaping performance of insulating cleaning agent Download PDFInfo
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- CN108414390B CN108414390B CN201810163236.5A CN201810163236A CN108414390B CN 108414390 B CN108414390 B CN 108414390B CN 201810163236 A CN201810163236 A CN 201810163236A CN 108414390 B CN108414390 B CN 108414390B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
Abstract
The invention belongs to the power grid technology, and particularly relates to a method for testing decontamination self-escaping performance of an insulating cleaning agent, which comprises the following steps of weighing the mass of a glass groove mold; distributing and smearing dirt according to the dirt grade, placing the dirt in an oven for drying, and recording the quality; sucking a certain amount of insulating cleaning agent, dripping the insulating cleaning agent on the smeared surface to obtain a test sample, and recording the weight of the test sample; recording the mass change in the volatilization process according to the time interval of density before density and density after density; putting the test sample into a 30-degree constant temperature box until the volatilization of the cleaning agent is finished, and recording the quality; putting the solution into a glass container filled with distilled water, cleaning the solution by using a clean brush, testing the conductivity of the solution after cleaning, and converting the conductivity to obtain equivalent salt density; obtaining the quality change rule and the volatilization residual percentage of the insulating cleaning agent in the volatilization process after data processing; and evaluating the decontamination self-escaping performance of the insulating cleaning agent by comparing the initial salt deposit density with the residual equivalent salt deposit density and the quality change rule of the cleaning agent in the volatilization process. The method can provide a basis for selecting the insulating cleaning agent.
Description
Technical Field
The invention belongs to the technical field of power grids, and particularly relates to a method for testing decontamination self-escaping performance of an insulating cleaning agent.
Background
The pollution flashover accident of the external insulation of the power transmission and transformation equipment caused by the atmospheric pollution seriously damages an electric power system, the safe and reliable operation of the electric power system is seriously influenced, and the research on a safe and efficient cleaning method of the insulator is particularly important for preventing the pollution flashover accident.
The electrified cleaning mode of the insulating cleaning agent is a very good cleaning idea, the industrial insulating cleaning agent with high volume resistivity is used, the adhesion force of dirt is reduced by utilizing the dissolving and permeating action of the insulating cleaning agent on the dirt, and the dirt is fallen off under the action of the jet force.
The insulating cleaning agent contains a lot of volatile organic compounds, and after the cleaning agent is contacted with dirt, the cleaning agent is quickly volatilized in the process of dissolving and loosening the dirt, so that the moisture on the surface of the insulator can be taken away when the cleaning agent is volatilized, the insulating value during operation is further improved, and the operation becomes safer. The insulation cleaning agent electrified cleaning of the insulator has been developed in an electric power system for many years, however, at present, no test method exists for the decontamination self-dissipation performance of the insulation cleaning agent, namely, no test method is determined for whether the insulation cleaning agent can carry away salt density in the volatilization process, and whether the volatility performance and the volatilization performance are completely determined, so that certain blindness exists in the selection of the insulation electrified cleaning agent.
Disclosure of Invention
The invention aims to provide a method for testing the decontamination capability and the volatility of an insulating cleaning agent in the volatilization process and whether the insulating cleaning agent can be completely volatilized, and provides a basis for selecting the insulating cleaning agent.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for testing decontamination self-escaping performance of an insulating cleaning agent comprises the following steps:
step 4, recording the mass of the test sample in the volatilization process according to different time intervals;
step 5, after the recording is finished, putting the test sample into a 30 ℃ constant temperature box until the volatilization process of the insulating cleaning agent is finished, and recording the final quality of the test sample;
step 6, putting the test sample into a glass container filled with a certain amount of distilled water, cleaning the test sample by using a clean brush, testing the conductivity of the solution in the glass container after cleaning, and calculating to obtain the residual equivalent salt density;
step 7, obtaining the quality change rule and the volatilization residual percentage of the insulating cleaning agent in the volatilization process through data processing;
and 8, evaluating the decontamination self-escaping performance of the insulating cleaning agent according to the difference value of the initial salt density value and the residual equivalent salt density value and the quality change rule of the insulating cleaning agent in the volatilization process.
In the method for testing the decontamination self-escaping performance of the insulating cleaning agent, in the step 1, the external dimension of the glass groove die is 120mm multiplied by 14mm, the internal dimension is 10mm, and the size of the internal bottom surface of the glass groove die is 100mm multiplied by 100 mm.
In the method for testing the decontamination self-escaping performance of the insulating cleaning agent, the artificial foul solution is prepared by weighing sodium chloride and kaolin according to the salt density and ash density values corresponding to the foul grades and using deionized water for preparation; the manual dirty liquid is evenly coated by a needle.
In the method for testing the decontamination self-escaping performance of the insulating cleaning agent, the step 4 records the mass of the test sample once per minute within the first 5min according to different time intervals; then recording every 5min for 3 times; finally, record once for 15 min.
The invention has the beneficial effects that: smearing on a glass groove die, adding an insulating cleaning agent, and judging the decontamination capability of the insulating cleaning agent in the volatilization process according to the difference value of the initial salt deposit density value and the residual equivalent salt deposit density value, namely whether a part of salt deposit density can be taken away by the insulating cleaning agent in the volatilization process; according to the quality change in the volatilization process, the volatility of the insulating cleaning agent at normal temperature and the residual percentage after volatilization are judged, the decontamination self-dissipation performance of the insulating cleaning agent is finally evaluated, and certain reference is provided for selection of the insulating cleaning agent.
Drawings
FIG. 1 is a schematic flow chart of a method for testing the decontamination self-dissipation performance of an insulating cleaning agent;
FIG. 2 is a diagram of a glass cell mold configuration for use in the insulation cleaner stain removal self-fugitive performance test method;
FIG. 3 is a schematic view of a glass tank mold being smeared and an insulating cleaning agent being added; wherein, 1-purified water, 2-filthy powder and 3-insulating cleaning agent.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment is realized by adopting the following technical scheme, and the method for testing the decontamination self-escaping performance of the insulating cleaning agent comprises the following steps:
step a: weighing the mass of the empty groove of the glass groove die by using an electronic balance;
step b: preparing artificial foul solution corresponding to the foul grade according to the area of the glass tank, uniformly coating the artificial foul solution on the bottom surface inside the glass tank, placing the glass tank in a constant-temperature drying box for drying, taking out the glass tank after drying, observing, measuring and recording the quality of the glass tank;
step c: sucking a certain amount of insulating cleaning agent by using a glass needle tube, uniformly dripping the insulating cleaning agent on a stained glass groove to obtain a test sample, and weighing and recording the mass of the test sample;
step d: recording the quality of the test sample in the volatilization process according to the time interval of density before density and density after density;
step e: after the recording is finished, placing the test sample into a 30 ℃ constant temperature box until the volatilization process of the cleaning agent is finished, and recording the final quality of the test sample;
step f: putting a test sample into a glass container filled with a certain amount of distilled water, cleaning the test sample by using a clean brush, testing the conductivity of a test solution after cleaning, and calculating to obtain the residual equivalent salt density;
step g: processing data to obtain the quality change rule and the volatilization residual percentage of the insulating cleaning agent in the volatilization process;
step h: and evaluating the decontamination self-escaping performance of the insulating cleaning agent according to the difference value of the initial salt density value and the residual equivalent salt density value and the quality change rule of the cleaning agent in the volatilization process.
As shown in fig. 1, a schematic flow chart of a method for testing the decontamination self-escaping performance of an insulating cleaning agent is shown, and comprises the following steps:
weighing the weight of the empty glass groove die by using an electronic balance;
wherein a glass groove mold of 120mm x 14mm specification size was used to simulate the surface of a glass insulator with a groove depth of 10mm and a glass groove interior size of 100mm x 100mm as shown in fig. 2.
Step (2) according to the size of the bottom area of the interior of the glass tank mold, preparing artificial foul solution corresponding to the foul grade, uniformly coating the artificial foul solution on the bottom surface of the interior, placing the artificial foul solution in a constant-temperature drying box for drying, taking out the artificial foul solution after the artificial foul solution is dried, observing the artificial foul solution, measuring and recording the quality of the artificial foul solution;
the area of the glass groove is 100m2According to the salt density and ash density values corresponding to the pollution grades, sodium chloride and kaolin are weighed, and deionized water is used for preparing artificial polluted liquid, wherein the artificial polluted liquid smearing process is completed by using a needle head, so that smearing caused by taking away a large amount of polluted liquid by using a brush in the smearing process is avoided to the maximum extentThe data of the surface artificial foul solution is inaccurate. The mass of the empty groove is subtracted from the mass of the glass groove after being smeared and dried, and then the mass of the artificial foul solution can be obtained.
Step (3) absorbing a certain amount of insulating cleaning agent by using a glass needle tube, uniformly dripping the insulating cleaning agent on the surface of the stained glass groove to obtain a test sample, and weighing and recording the mass of the test sample;
the quantity of the insulating cleaning agent is 5-10 ml, and the initial mass of the insulating cleaning agent can be obtained by subtracting the mass of the glass tank mold and the mass of the artificial dirty liquid from the mass of the test sample weighed at the moment. The schematic diagram of smearing and adding insulating detergent to the glass tank mold is shown in fig. 3.
Step (4) recording the quality of the test sample in the volatilization process according to the time interval of density before density and density after density;
the time interval is taken as the record of the quality of the test sample every minute in the first 5min, every 5min thereafter, 3 times in total, and finally, every 15min interval.
After the recording is finished, putting the test sample into a 30 ℃ constant temperature box until the volatilization process of the cleaning agent is finished, and recording the final quality of the test sample;
putting a test sample into a glass container filled with a certain amount of deionized water, cleaning the test sample by using a clean brush, testing the conductivity of the test solution after cleaning, and calculating to obtain the residual equivalent salt density;
the residual salt density is calculated as follows:
wherein, delta is the solution conductivity, and V is the deionized water content (cm)3) And A is the area (cm) of the surface to be cleaned2) K is a conversion index of 800us/cm2When k is 0.91.
Processing data to obtain the quality change rule and the volatilization residual percentage of the insulating cleaning agent in the volatilization process;
the data processing method is to subtract the quality of the glass tank mould and the quality of the artificial dirty liquid from each data recorded in the volatilization process to obtain the quality change rule of the insulating cleaning agent. And (4) comparing the value obtained by subtracting the mass of the glass groove die and the mass of the artificial foul solution from the final mass of the cleaning agent after the volatilization process with the initial mass of the cleaning agent to obtain the volatilization residual percentage of the insulating cleaning agent.
And (8) evaluating the decontamination self-escaping performance of the insulating cleaning agent according to the difference value of the initial salt density value and the residual equivalent salt density value and the quality change rule of the cleaning agent in the volatilization process.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
Although specific embodiments of the present invention have been described above with reference to the accompanying drawings, it will be appreciated by those skilled in the art that these are merely illustrative and that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is only limited by the appended claims.
Claims (2)
1. A method for testing decontamination self-escaping performance of an insulating cleaning agent is characterized by comprising the following steps:
step 1, simulating the surface of a glass insulator by using a glass groove mold, and weighing the mass of the glass groove mold by using an electronic balance;
step 2, according to the size of the area of the glass groove mold, preparing artificial foul solution corresponding to the foul grade, uniformly coating the artificial foul solution on the bottom surface inside the glass groove mold, putting the glass groove mold into a constant-temperature drying box for drying, taking out the glass groove mold after drying to obtain a stained glass groove, weighing and recording the quality of the stained glass groove;
step 3, absorbing a certain amount of insulating cleaning agent by using a glass needle tube, uniformly dripping the insulating cleaning agent on the surface of the stained glass groove to obtain a test sample, and weighing and recording the mass of the test sample;
step 4, recording the mass of the test sample in the volatilization process according to different time intervals;
step 5, after the recording is finished, putting the test sample into a 30-degree constant temperature box until the volatilization process of the insulating cleaning agent is finished, and recording the final quality of the test sample;
step 6, putting the test sample into a glass container filled with a certain amount of distilled water, cleaning the test sample by using a clean brush, testing the conductivity of the solution in the glass container after cleaning, and calculating to obtain the residual equivalent salt density;
step 7, obtaining the quality change rule and the volatilization residual percentage of the insulating cleaning agent in the volatilization process through data processing;
step 8, evaluating the decontamination self-escaping performance of the insulating cleaning agent according to the difference value between the initial salt density value and the residual equivalent salt density value and the quality change rule of the insulating cleaning agent in the volatilization process;
step 4, recording the quality of the test sample once per minute within the first 5min according to different time intervals; then recording every 5min for 3 times; recording for 15 min;
the preparation of the artificial foul solution is to weigh sodium chloride and kaolin according to the salt density and ash density values corresponding to the foul grade and prepare the sodium chloride and the kaolin with deionized water; the manual dirty liquid is evenly coated by a needle.
2. The method for testing the decontamination self-escaping performance of an insulating cleaning agent according to claim 1, wherein the dimensions of the glass groove mold in the step 1 are 120mm x 14mm in external dimension, 10mm in internal dimension, and 100mm x 100mm in internal bottom dimension.
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| CN113219128A (en) * | 2021-03-29 | 2021-08-06 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Performance detection method for cleaning agent for silicon rubber external insulation of power system |
| CN113109067B (en) * | 2021-04-14 | 2023-03-24 | 中国家用电器研究院 | Dish washer cleanliness rate testing method and system |
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| US5991146A (en) * | 1997-09-04 | 1999-11-23 | Bokhary; Tario I. | Method and device to reduce electrical insulator flashover |
| US7797781B2 (en) * | 2007-06-11 | 2010-09-21 | Korea Electric Power Corporation | Robot mechanism for cleaning and inspection of live-line insulators |
| CN101393152B (en) * | 2008-10-24 | 2011-12-28 | 重庆电力科学试验研究院 | Insulator dirty degree sampling and measurement method and special funnel device |
| CN102288515A (en) * | 2011-07-29 | 2011-12-21 | 武汉大学 | Insulator dirt on-site sampling and contamination degree measuring method |
| CN105067473A (en) * | 2015-07-30 | 2015-11-18 | 国网山东省电力公司电力科学研究院 | Method for measuring operating insulator contamination degree |
| CN106635510B (en) * | 2016-11-15 | 2019-01-18 | 国网江苏省电力公司无锡供电公司 | A kind of environment-friendly type charged electric power apparatus cleaning agent and preparation method thereof |
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