CN214408150U - A disposable sampling bag for insulating oil - Google Patents
A disposable sampling bag for insulating oil Download PDFInfo
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- CN214408150U CN214408150U CN202022580672.8U CN202022580672U CN214408150U CN 214408150 U CN214408150 U CN 214408150U CN 202022580672 U CN202022580672 U CN 202022580672U CN 214408150 U CN214408150 U CN 214408150U
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Abstract
The utility model provides a disposable sampling bag for insulating oil belongs to insulating oil sampling device technical field, including the sampling bag, advance oil pipe, pneumatic tube, go out oil pipe and rubber cap. The utility model discloses owing to be disposable consumables, owing to there is the scale mark can be according to required volume sampling, can carry out waste recovery after using, places in batches at each transformer substation, and the convenient oil sample of in time getting. The polyvinyl chloride bag has good corrosion resistance, strong pressure resistance, no chemical reaction with insulating oil and good sealing performance. The time consumed by cleaning the sampling bottle and the time consumed by the retracing transformer substation and the laboratory for taking the bottle are completely saved, unnecessary physical labor is avoided, the time cost is greatly saved, the working efficiency of operation and maintenance personnel is improved, and the labor intensity of the operation and maintenance personnel is reduced. The pneumatic tube is used for balancing pressure, takes off the rubber cap in the use, and the inflow of oil appearance is flowed out and can be guaranteed smoothly. The sampling bag has strong practicability and high cost performance, and is suitable for popularization and application in the electric power system chemical examination industry.
Description
Technical Field
The utility model belongs to the technical field of insulating oil sampling device, especially relate to a disposable sampling bag for insulating oil.
Background
In the present electric power system, the insulating oil is widely applied to high-voltage electrical equipment such as transformers, mutual inductors, oil-filled cables, power capacitors and bushings, and mainly has the functions of insulation, heat dissipation and cooling, arc extinction, iron core and coil protection and corrosion delay of oxygen to insulating materials. However, in actual operation, the performance of the insulating oil is gradually reduced under the action of oxygen, moisture, high temperature, strong electric field and impurities, so that an insulating oil analysis test must be periodically performed to investigate the performance of the insulating oil, and the operation state of the equipment is judged and monitored.
Adopt the sampling bottle to carry out the insulating oil sampling among the prior art usually, but the washing, the stoving, the sealed and unified preservation that need carry out the sampling bottle earlier before the sampling at every turn, fortune dimension personnel need first draw when using and just can carry out the sampling. Statistics shows that the longest oil extraction preparation link time accounts for 72.87% of the total time in the whole process of the insulating oil analysis test, which is a key symptom of the long whole process time of the insulating oil analysis test, so how to effectively reduce the oil extraction preparation time, improve the test working efficiency and reduce the equipment power failure time becomes a problem to be solved urgently in the power system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a disposable sampling bag for insulating oil is used for solving and uses the sampling bottle to carry out insulating oil analysis test, need carry out complicated links such as washing, stoving, sealed and the extraction of sampling bottle, technical problem that work efficiency is low.
A disposable sampling bag for insulating oil comprises a sampling bag, an oil inlet pipe, an air pressure pipe, an oil outlet pipe and a rubber cap, wherein the oil inlet pipe and the air pressure pipe are arranged at the upper part of the sampling bag, the oil outlet pipe is arranged at the lower part of the sampling bag, and the interior of the sampling bag is respectively communicated with the oil inlet pipe, the air pressure pipe and the oil outlet pipe; the free end pipe orifices of the oil inlet pipe, the air pressure pipe and the oil outlet pipe are all sleeved with rubber caps.
The sampling bag is a polyvinyl chloride bag, and the sealing pressure resistance value of the sampling bag is not less than 0.5 pa.
And a suspension belt for suspending and fixing the sampling bag is arranged at the upper part of the sampling bag.
And the outer surface of the sampling bag is provided with scale marks for displaying the volume.
The outer wall of the free end pipe orifice of the oil inlet pipe is connected with the inner wall of an oil outlet of the three-way valve for sampling in a matching way.
The outer wall of the free end pipe orifice of the oil outlet pipe is connected with the inner wall of the sample inlet of the insulating oil testing equipment in a matching manner.
Through the above design scheme, the utility model discloses following beneficial effect can be brought:
the utility model discloses owing to be disposable consumables, owing to there is the scale mark can be according to required volume sampling, can carry out waste recovery after using, places in batches at each transformer substation, and the convenient oil sample of in time getting. The polyvinyl chloride bag has good corrosion resistance and strong pressure resistance, does not chemically react with insulating oil, has good sealing property, can ensure the cleanness of an oil sample, and eliminates the interference of the external environment of the oil sample. The time consumed by cleaning the sampling bottle and the time consumed by the retracing transformer substation and the laboratory for taking the bottle are completely saved, unnecessary physical labor is avoided, the time cost is greatly saved, the working efficiency of operation and maintenance personnel is improved, and the labor intensity of the operation and maintenance personnel is reduced. The pneumatic tube is used for balancing pressure, and this pneumatic tube adopts the rubber cap shutoff equally before using for isolated air and vapor, take off the rubber cap in the use, the inflow of oil appearance is flowed and is ensured smoothly, and the leakproofness can effectively be guaranteed. The sampling bag has strong practicability and high cost performance, and is suitable for popularization and application in the electric power system chemical examination industry.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is a schematic structural view of a disposable sampling bag for insulating oil of the present invention.
In the figure, 1-a sampling bag, 2-an oil inlet pipe, 3-an air pressure pipe, 4-an oil outlet pipe and 5-a rubber cap.
Detailed Description
A disposable sampling bag for insulating oil comprises a sampling bag 1, an oil inlet pipe 2, a gas pressure pipe 3, an oil outlet pipe 4 and a rubber cap 5, wherein the oil inlet pipe 2 and the gas pressure pipe 3 are arranged at the upper part of the sampling bag 1, the oil outlet pipe 4 is arranged at the lower part of the sampling bag 1, and the interior of the sampling bag 1 is respectively communicated with the oil inlet pipe 2, the gas pressure pipe 3 and the oil outlet pipe 4; the free end pipe orifices of the oil inlet pipe 2, the air pressure pipe 3 and the oil outlet pipe 4 are all sleeved with rubber caps 5.
The sampling bag 1 is a polyvinyl chloride bag, and the sealing pressure resistance value of the sampling bag 1 is not less than 0.5 pa.
The upper part of the sampling bag 1 is provided with a suspension belt for suspending and fixing the sampling bag 1.
And the outer surface of the sampling bag 1 is provided with scale marks for displaying the volume.
The outer wall of the free end pipe orifice of the oil inlet pipe 2 is connected with the inner wall of an oil outlet of a three-way valve for sampling in a matching way.
The outer wall of the free end pipe orifice of the oil outlet pipe 4 is connected with the inner wall of the sample inlet of the insulating oil testing equipment in a matching way.
The advantages of the disposable sampling bag for insulating oil are verified as follows:
1. in order to verify the relative error of the test data after sampling by using the sampling bag, the panelist selects a chromatographic test item which is easily affected by cleanliness to perform contrast test detection. An insulating oil sample with a known value of gas dissolved in oil is prepared by a special instrument of a manufacturer and is called a standard sample, a sampling bag and a sampling bottle are respectively used for containing the same insulating oil sample, a chromatographic test is carried out under the condition that other test conditions are not changed, and the relative error of data is inspected (beta ═ measured value-true value |/true value 100%). The statistical results are as follows:
demonstration table for sampling bag structure scheme
By comparing the data with the configured standard sample, the relative error beta of the sampling bottle can be seen1Is less than 5%, and the relative error beta of the sampling bag2The cleanliness of the material of the sampling bag can be controlled to be below 3%, the cleanliness is high, the self property of the oil sample is not affected, and the accuracy of test data is higher.
2. Carry out the Effect test
(1) Checking tightness
The panelists assembled the devices in their entirety in the laboratory and tested for hermeticity, taking the minimum allowable pressure of the entire joint as the test pressure, i.e., 0.5 pa. We randomly selected 10 sampling bags, inflated with 0.5Mpa of air, and examined the pressure change using a gas pressure gauge periodically, with the results shown in the following table:
sealing performance test result statistical table
The results showed that 10 sampling bags were free from air leakage within 10 days, and the sealability was 100%.
(2) Checking validity period
The quality guarantee period is 24 months and is more than the target value of 12 months by confirming with a manufacturer, simultaneously investigating the prior bags with the same material on the market, and hermetically storing the sampling bags under the conditions of light and moisture protection. In order to actually verify whether the validity period of the sealing performance of the sampling bags reaches 12 months, the group selects 10 sampling bags again to perform an accelerated aging test, and the destructive effect of the natural environment on the sampling bags is simulated and strengthened.
Since the sampling bag is known to be stored indoors for a long period of time, the daily use environment of the sampling bag is set to 20 ℃ and 30% RH, and it is planned to perform an accelerated aging test under high-temperature and high-humidity conditions of 50 ℃ and 60% RH. In order to accurately obtain how long the test time of the sampling bag in a controllable test environment is equivalent to 1 year of use under actual conditions, the panellists select a Hallberg-Peck model for calculation:
Tmeasuring＝TEyes of a user/AF＝TEyes of a user/(RHt/RHu)3·exp{(Ea/k)·[(1/Tu)-(1/Tt)]}
Wherein: t isMeasuringThe unit is h for the test duration; t isEyes of a userTarget service life in units of h; AF is an acceleration factor; eaThe energy consumption for separating out faults is 1.0 ev; k is Boltzmann constant, 8.617385 x 10-5; t isuIs the absolute temperature value in k under use conditions (non-accelerated conditions); t istIs the absolute temperature value in the test condition (under acceleration condition) in k; RH (relative humidity)uIs the relative humidity value under the conditions of use (non-accelerated state), expressed in percentage; RH (relative humidity)tIs to measureThe relative humidity values under test conditions (under accelerated conditions) are expressed in percent.
Here TEyes of a user＝24h*365＝8760h，Tu＝273+20＝293k，Tt＝273+50＝333k，RHu＝30％， RHt60%, finally calculating TMeasuring＝9.4h。
After 9.4h of accelerated aging test is completed, the panelist verifies the tightness of the 10 aged sampling bags again, the tightness still can reach 100%, the validity period of the tightness of the sampling bags is proved to be at least 12 months, the sampling bags can be placed in all substations in a centralized mode, the requirement of oil sampling test at any time can be met within one year, and the problem of limitation of storage time of sampling bottles is solved.
3. Benefit analysis
The cost of the activity is as follows:
material cost plus manufacturing cost for insulating oil sampling bag
Total cost 198+230 428 (yuan)
(1) Economic benefits
Statistics show that the group needs to take about 2000 oil samples every year, and since 8 months in 2019, insulating oil sampling bags are tried, the group uses 783 sampling bags in total. The sampling bags are high in manufacturing cost in the early stage, and each sampling bag is 0.4 yuan in later-stage batch production. The original insulating oil sampling bottle of subgroup 300, there are the condition such as damaged, scrap in the use, need to renew 60 sampling bottles annually.
The cost of manufacturing the sampling bag after the insulating oil sampling bag is changed (8 to 12 months) is about 783 multiplied by 0.4+428 ═ 954.2 yuan
The cost of purchasing the cleaning agent for cleaning the insulating oil sampling bottle (8 to 12 months) is about 30 multiplied by 17.45 to 523.5 yuan (8 to 12 months)
The total cost consumption of insulating oil sampling bottles (months 8 to 12) is 523.5+ 78-601.5 yuan.
Compare and purchase newly to add insulating oil sampling bottle before every year, use insulating oil sampling bag though be disposable consumables, compare and use original sampling bottle cost to differ a little, moreover follow-up production only need according to every 0.4 yuan purchase to the producer can. Although the economic benefit is not great, the saved time cost and the saved labor cost of the testers are difficult to calculate.
(2) Social benefits
After the group moves, the time consumption of the whole process of the insulating oil analytical test is greatly reduced, an oil taking preparation link is omitted, the test working efficiency is greatly improved, a diagnosis result is provided more timely and efficiently to the tested equipment, and the development of the next-step maintenance processing work of the fault equipment is facilitated.
Meanwhile, the group member changes the insulating oil sampling bottle into a sampling bag, and the sampling bag is placed in each transformer substation in batch production, so that the cleanness of the oil sample is fully ensured while the oil sample is conveniently and timely taken, and the interference of the external environment of the oil sample is eliminated. The accuracy and the standardability in the aspect of testing skills are greatly improved, and a more accurate and reliable reference basis can be provided for the equipment state maintenance of a company.
The team members report the topic, and the accuracy and the safety of the result accord with relevant regulations after being identified by superior departments, so that powerful support is provided for the later use, popularization and application in the work.
4. Making consolidation measures
The group used 11 and 12 months in 2019 as the activity consolidation period during which the insulating oil analysis tests were run for the entire duration of time, with the results shown in the following table:
time used in the whole process of analytical tests of each transformer substation in 11 and 12 months in 2019
| Transformer substation | Changchun wine | Superstrong strength | Pesticide 'nong' an | Nine tables | (Pudong) | Flat spring | Taibei China |
| Test the whole process time (min) | 109 | 121 | 156 | 147 | 97 | 86 | 103 |
Therefore, the time required by the whole process of the analysis test of the single-group oil sample of each transformer substation is 156min at most, and is reduced to below 230 min, so that the requirement of a company is met. The problem that the whole process of an insulating oil test is long due to the fact that the oil taking preparation time is too long is effectively solved.
Through the efforts of the group members, the mode of developing the insulating oil sampling bag is utilized to replace the original glass sampling bottle, the cleanness of the test oil sample is ensured while the labor is liberated to improve the working efficiency, and the test numerical value is more accurate and efficient. The reliability of the supervision means of the test professional insulating oil detection technology is ensured. The sampling bag has strong practicability and high cost performance, and is suitable for popularization and application in the electric power system chemical examination industry.
Claims (6)
1. A disposable sampling bag for insulating oil is characterized in that: the sampling device comprises a sampling bag (1), an oil inlet pipe (2), a gas pressure pipe (3), an oil outlet pipe (4) and a rubber cap (5), wherein the oil inlet pipe (2) and the gas pressure pipe (3) are arranged at the upper part of the sampling bag (1), the oil outlet pipe (4) is arranged at the lower part of the sampling bag (1), and the interior of the sampling bag (1) is respectively communicated with the oil inlet pipe (2), the gas pressure pipe (3) and the oil outlet pipe (4); the free end pipe orifices of the oil inlet pipe (2), the air pressure pipe (3) and the oil outlet pipe (4) are all sleeved with rubber caps (5).
2. A disposable sampling bag for insulating oil according to claim 1 wherein: the sampling bag (1) is a polyvinyl chloride bag, and the sealing pressure resistance value of the sampling bag (1) is not less than 0.5 pa.
3. A disposable sampling bag for insulating oil according to claim 1 wherein: the upper part of the sampling bag (1) is provided with a suspension belt for suspending and fixing the sampling bag (1).
4. A disposable sampling bag for insulating oil according to claim 1 wherein: the outer surface of the sampling bag (1) is provided with scale marks for displaying the volume.
5. A disposable sampling bag for insulating oil according to claim 1 wherein: the outer wall of the free end pipe orifice of the oil inlet pipe (2) is connected with the inner wall of an oil outlet of the three-way valve for sampling in a matching way.
6. A disposable sampling bag for insulating oil according to claim 1 wherein: the outer wall of the free end pipe orifice of the oil outlet pipe (4) is connected with the inner wall of the sample inlet of the insulating oil testing equipment in a matching way.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022580672.8U CN214408150U (en) | 2020-11-10 | 2020-11-10 | A disposable sampling bag for insulating oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022580672.8U CN214408150U (en) | 2020-11-10 | 2020-11-10 | A disposable sampling bag for insulating oil |
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| CN214408150U true CN214408150U (en) | 2021-10-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362394A (en) * | 2020-11-10 | 2021-02-12 | 国网吉林省电力有限公司长春供电公司 | A disposable sampling bag for insulating oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362394A (en) * | 2020-11-10 | 2021-02-12 | 国网吉林省电力有限公司长春供电公司 | A disposable sampling bag for insulating oil |
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