CN102033118B - Method for testing aging degree of transformer oil - Google Patents
Method for testing aging degree of transformer oil Download PDFInfo
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- CN102033118B CN102033118B CN2009101963956A CN200910196395A CN102033118B CN 102033118 B CN102033118 B CN 102033118B CN 2009101963956 A CN2009101963956 A CN 2009101963956A CN 200910196395 A CN200910196395 A CN 200910196395A CN 102033118 B CN102033118 B CN 102033118B
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Abstract
The invention relates to industrial oil detection, in particular to a method for testing transformer oil. The method for testing the aging degree of the transformer oil comprises the following steps: 1) an oil sample test: accurately weighing 5.0 to 10.0g of aged test oil, adding 50ml of mixed solution of ethanol-petroleum ether, sufficiently and uniformly shaking, adding 0.5ml of alkali blue B indicator, and dripping KOH ethanol solution of which the concentration is 0.05mol/L until the color of the mixed solution is turned into light red; 2) a blank solvent test; and 3) calculation. In the method, benzene serving as solvent is abandoned, so the toxicity of the aging test is reduced, and the operation is simple and convenient.
Description
Technical field
The present invention relates to industrial oil and detect, relate in particular to a kind of method of testing of transformer oil.
Background technology
When the oil-filled deficiency of transformer equipment needs to replenish fresh oil, preferably add fresh oil with the trade mark.Each item characteristic index of adding oil product all should be not less than the oil in the equipment.If it is less that new oil subsidy is gone into amount, for example less than 5% o'clock, any problem can not appear usually; If it is more that new oil subsidy is gone into amount, particularly will more fresh oil add serious aging near in the oil that moves the oil quality standard min time, just possibly cause separating out rapidly in the oil greasy filth; The necessary mixing when using of operation oil of the different trades mark, because oil composition, the type of contained adjuvant is different, and mixing is used and maybe chemical change be taken place and produce impurity.The deposition of greasy filth and impurity will influence the heat dispersion of equipment, also solid insulating material and metal is caused serious corrosion simultaneously, causes decreasing insulating, and harmfulness is bigger, even can cause that equipment breakdown takes place.Therefore should be prudent especially during contaminated product, various oil and the mixed oil sample that should participate in mixing in advance are that the DL429.6-91 method is carried out aging test by " moving the aging determination method of oily open cup ".
" moving the aging determination method of oily open cup " is the miscella aging test that DL429.6-91 is used for operating insulating oil or steam turbine oil; It is 115 ± 1 ℃ ageing oven case 72h that (containing copper catalyst in the formation testing) container that formation testing is housed is put into temperature, takes out the back and measures acid number and sediment.This method adopts ethanol-benzene (1+1) mixed liquor when acid value measuring be solvent; Because benzene has bigger toxicity and stronger pungency; It is healthy to have a strong impact on laboratory environment and analyst, and uses benzene can make operating personnel slow poisoning symptoms such as neurasthenia, hemopoietic system change occur for a long time.In the today of advocating harmonious society, harmonious enterprise, people's environmental consciousness and health perception constantly strengthen, and the cry of hoping to develop low toxicity, simple analysis method is increasingly high.
Summary of the invention
The present invention is intended to solve the above-mentioned defective of prior art, and a kind of transformer oil ageing Tachistoscope method is provided.The present invention has abandoned benzene as solvent, reduces the toxicity of aging test, and is easy and simple to handle.
The present invention is achieved in that
A kind of transformer oil ageing Tachistoscope method, it comprises the following steps:
1). the oil samples test
Accurately the aging back formation testing of weighing 5.0～10.0g adds ethanol-sherwood oil mixed liquor 50ml, fully shakes up, and adds alkali blue 6B indicator 0.5ml then, become light red with KOH ethanolic solution titration to the mixed solution color of 0.05mol/L till;
2). the blank solvent test
Measure 50ml ethanol-sherwood oil mixed liquor, carry out blank determination by above-mentioned same operation;
3). calculate
2. it is following to calculate aging back formation testing acid number formula:
c(mgKOH/g)＝(V-V1)*C1*56.1/m
Wherein
C: acid number, mgKOH/g
V: during the titration formation testing, the volume of the 0.05mol/L potassium hydroxide-ethanol solution appearance that consumes, ml
V1: during the titration blank solution, the volume of the 0.05mol/L left and right sides potassium hydroxide-ethanol solution appearance that consumes, ml
C1: the concentration of potassium hydroxide-ethanol solution, mol/L
M: the quality of ageing oil, g
56.1: the molecular weight of potassium hydroxide.
Described a kind of transformer oil ageing Tachistoscope method, the ethanol in said ethanol-sherwood oil mixed liquor and the volume ratio of sherwood oil are 1: 1.
The present invention changes etoh solvent-benzene (1+1) mixed liquor into ethanol-sherwood oil (1: 1) mixed liquor; Through testing with the DL429.6-91 comparison; Test result has good consistance, and this new method has low, the convenience operation of toxicity simultaneously, can satisfy the requirement of production.
Embodiment
A kind of transformer oil ageing Tachistoscope method, it comprises the following steps:
1). the oil samples test
Accurately the aging back formation testing of weighing 5.0～10.0g adds ethanol-sherwood oil mixed liquor 50ml, fully shakes up, and adds alkali blue 6B indicator 0.5ml then, become light red with KOH ethanolic solution titration to the mixed solution color of 0.05mol/L till;
2). the blank solvent test
Measure 50ml ethanol-sherwood oil mixed liquor, carry out blank determination by above-mentioned same operation;
3). calculate
3. it is following to calculate aging back formation testing acid number formula:
c(mgKOH/g)＝(V-V1)*C1*56.1/m
Wherein
C: acid number, mgKOH/g
V: during the titration formation testing, the volume of the 0.05mol/L potassium hydroxide-ethanol solution appearance that consumes, ml
V1: during the titration blank solution, the volume of the 0.05mol/L potassium hydroxide-ethanol solution appearance that consumes, ml
C1: the concentration of potassium hydroxide-ethanol solution, mol/L
M: the quality of ageing oil, g
56.1: the molecular weight of potassium hydroxide.
Described a kind of transformer oil ageing Tachistoscope method, the ethanol in said ethanol-sherwood oil mixed liquor and the volume ratio of sherwood oil are 1: 1.
Tested the acid number of the different transformer oil sample of 15 degree of agings according to the method for the invention respectively; Compare (seeing table 1) with the result who measures by the DL429.6-91 method simultaneously; The result shows to have good consistance between them, thereby explains that this method is fully feasible.
The acid number result that table 1 distinct methods is measured
Claims (2)
1. a transformer oil ageing Tachistoscope method is characterized in that it comprises the following steps:
1). the oil samples test
Accurately the aging back formation testing of weighing 5.0～10.0g adds ethanol-sherwood oil mixed liquor 50ml, fully shakes up, and adds alkali blue 6B indicator 0.5ml then, become light red with KOH ethanolic solution titration to the mixed solution color of 0.05mol/L till;
2). the blank solvent test
Measure 50ml ethanol-sherwood oil mixed liquor, carry out blank determination by above-mentioned same operation;
3). calculate
It is following to calculate aging back formation testing acid number formula:
c(mgKOH/g)＝(V-V1)*C1*56.1/m
Wherein
C: acid number, mgKOH/g
V: during the titration formation testing, the volume of the 0.05mol/L potassium hydroxide-ethanol solution appearance that consumes, ml
V1: during the titration blank solution, the volume of the 0.05mol/L potassium hydroxide-ethanol solution appearance that consumes, ml
C1: the concentration of potassium hydroxide-ethanol solution, mol/L
M: the quality of ageing oil, g
56.1: the molecular weight of potassium hydroxide.
2. a kind of transformer oil ageing Tachistoscope method according to claim 1 is characterized in that the ethanol in said ethanol-sherwood oil mixed liquor and the volume ratio of sherwood oil are 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101963956A CN102033118B (en) | 2009-09-25 | 2009-09-25 | Method for testing aging degree of transformer oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101963956A CN102033118B (en) | 2009-09-25 | 2009-09-25 | Method for testing aging degree of transformer oil |
Publications (2)
| Publication Number | Publication Date |
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| CN102033118A CN102033118A (en) | 2011-04-27 |
| CN102033118B true CN102033118B (en) | 2012-11-14 |
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| CN2009101963956A Expired - Fee Related CN102033118B (en) | 2009-09-25 | 2009-09-25 | Method for testing aging degree of transformer oil |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628819B (en) * | 2012-03-22 | 2014-01-15 | 中国石油天然气股份有限公司 | Test method for evaluating oxidation stability of transformer oil under high-voltage alternating current or direct current field |
| CN102735682A (en) * | 2012-06-12 | 2012-10-17 | 广东电网公司电力科学研究院 | Accurate and simple transformer oil acid value detection method |
| CN103293417B (en) * | 2013-05-28 | 2016-05-25 | 北京华电云通电力技术有限公司 | The detection method of transformer degree of aging |
| CN106248912B (en) * | 2016-07-21 | 2018-04-03 | 广东电网有限责任公司电力科学研究院 | A kind of characterizing method of transformer oil ageing |
| CN111610316A (en) * | 2020-04-16 | 2020-09-01 | 浙江中博润滑油有限公司 | High-concentration transformer oil purity detection method |
| CN113533628B (en) * | 2021-07-19 | 2023-09-29 | 西安热工研究院有限公司 | Method for detecting acid value of synthetic lubricating oil |
| CN113945679B (en) * | 2021-10-22 | 2023-09-29 | 西安热工研究院有限公司 | Automatic detection method for acid value of synthetic lubricating oil |
| CN114089131B (en) * | 2021-11-03 | 2024-03-01 | 广东电网有限责任公司广州供电局 | Method for detecting aging of insulating oil of natural ester insulating oil transformer |
| CN114019091A (en) * | 2021-11-09 | 2022-02-08 | 西安热工研究院有限公司 | Acid value detection method for synthetic lubricating oil |
-
2009
- 2009-09-25 CN CN2009101963956A patent/CN102033118B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 王文昌.变压器油酸值快速测定法.《变压器》.1996,(第4期),13-16及附件. * |
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