CN104502414A - Method for manufacturing novel transformer oil water-containing sensor - Google Patents
Method for manufacturing novel transformer oil water-containing sensor Download PDFInfo
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- CN104502414A CN104502414A CN201410838860.2A CN201410838860A CN104502414A CN 104502414 A CN104502414 A CN 104502414A CN 201410838860 A CN201410838860 A CN 201410838860A CN 104502414 A CN104502414 A CN 104502414A
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- water
- transformer oil
- novel transformer
- platinum wire
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Abstract
The invention discloses a method for manufacturing a novel transformer oil water-containing sensor. The method comprises the following steps: dissolving polyvinyl alcohol into water, adding formaldehyde under catalyzing of hydrochloric acid, adding a foaming agent, and preparing porous polyvinyl formal under high-speed stirring; and injecting the prepared porous polyvinyl formal into a mold in which two platinum wire electrodes are inserted in advance, curing at a high temperature, so as to obtain the water-containing sensor. The sensor has conductive performance in humidity or water contained in oil, has high sensing capacity on trace water and can be used for a transformer oil water-containing sensor or a water-containing sensing device under other conditions. The sensor is readily available in raw materials, simple in manufacturing process, low in cost, high in water sensitivity and high in reproducibility and can be repeatedly used.
Description
Technical field
The invention belongs to water induction device preparation field, particularly the moisture inductor method for making of a kind of novel transformer oil, this inductor is specially adapted to the induction of the water yield in electric power transformer oil, is also applicable to the induction of other occasion micro-moistures.
Background technology
Many power transformers are had to be arranged on open air at present, transformer is along with load difference, transformer oil in transformer has and expands or shrink, malaria extraneous in the process expanded or shrink can enter in transformer, although the respirator of transformer has the function of dehumidifying, the drying agent of respirator lost efficacy, transformer oil will be caused with moisture, but when transformer oil water cut exceedes a certain amount of, gently then cause transformer to burn, heavy then can Explosion of Transformer be caused.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and provide a kind of novel transformer oil moisture inductor method for making.
Technical scheme of the present invention is: the moisture inductor method for making of a kind of novel transformer oil, comprises the steps:
The first step, first by water-soluble for the polyvinyl alcohol (PVA) polyvinyl alcohol water solution made containing polyvinyl alcohol (PVA) 5-9%, regulate the pH value of poly-vinyl alcohol solution between 1.5-3 with hydrochloric acid, be warming up between 75-80 DEG C, slowly add 37% formaldehyde again, the consumption of formaldehyde accounts for the 20-30% of poly-vinyl alcohol solution weight, in 1.5-3.0 hour, drip formaldehyde, add rear insulation reaction 0.5-1.0 hour;
Second step, by the polyvinyl formal of above-mentioned preparation without separation, add high-speed stirred after surfactant and form porous foams, the consumption of surfactant accounts for the heavy 1.8-2.2% of whole material;
3rd step, obtained porous foams injected be inserted with the cylindrical mold of two platinum wire electrodes in advance, at 80-120 DEG C of heating 1.5-2.5 hour, be solidified into the solid foam material with platinum wire electrode;
4th step, the solid foam material with platinum wire electrode made is soaked in water after 2-3 time, at 90-110 DEG C of drying and dehydrating, obtains the moisture inductor of novel transformer of the present invention oil.
The further technical scheme of the present invention is: the diameter 1.2-2.0mm of mould, and length is 5mm, and the diameter of platinum wire electrode is 0.1-0.15mm.
The present invention further technical scheme is: the distance between two platinum wire electrodes is 0.2-0.5mm.
The present invention more further technical scheme be: in second step, the stirring rate of high-speed stirred is 500-600 rev/min.
The moisture inductor of novel transformer oil of the present invention utilizes polyvinylformal to have this principle of superpower water absorption character to make.Moisture in operational process once electric power transformer oil, the moisture inductor of novel transformer oil of the present invention can adsorb the moisture in electric power transformer oil and conduct electricity, this signal can be changed into indicator signal or warning through amplifying, processing, burn to prevent transformer or explode.
Inductor raw material of the present invention is easy to get, manufacture craft is simple, cost is low, high to the susceptibility of water, and reproducibility is good, can Reusability, not only can be used as the moisture inductor of transformer oil but also may be used for cereal to preserve warehouse, can forecast that cereal is mouldy in advance, also can be used as rain alarm etc.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with figure and embodiment, detailed construction of the present invention is further described.
Embodiment 1
First 8g polyvinyl alcohol (PVA) 1799 is dissolved in 92g water, be warming up to 65-70 DEG C, start stirring and dissolving polyvinyl alcohol (PVA), regulate the pH value of poly-vinyl alcohol solution between 1.8-2.0 with hydrochloric acid, be warming up between 75-80 DEG C, slowly add 37% formaldehyde 20g again, in 1.6 hours, drip formaldehyde, add rear insulation reaction 40 minutes.Add after pulling open powder 2.5g, accelerate to be stirred to 500-600 rev/min and form porous foams, obtained porous foams is injected the mould 2 being inserted with two platinum wire electrodes 1 in advance, mould 2 diameter 1.2-2.0mm, length is 5mm, the diameter of platinum wire electrode 1 is 0.12mm, and the distance between two platinum wire electrodes 1 is 0.25mm, within 1.5-2.5 hour, can be solidified into solid foam material 80-120 DEG C of heating.Then after soaking 2-3 time with deionized water, at 90-110 DEG C of drying and dehydrating, the moisture inductor of novel transformer of the present invention oil is obtained.
Embodiment 2
First 7g polyvinyl alcohol (PVA) 1799 is dissolved in 93g water, be warming up to 65-70 DEG C, start stirring and dissolving polyvinyl alcohol (PVA), regulate the pH value of poly-vinyl alcohol solution between 1.8-2.0 with hydrochloric acid, be warming up between 75-80 DEG C, slowly add 37% formaldehyde 15g again, in 1.5 hours, drip formaldehyde, add rear insulation reaction 40 minutes.After adding SDS 2.0g, accelerate to be stirred to 500-600 rev/min and form porous foams, obtained porous foams is injected the mould 2 being inserted with two platinum wire electrodes 1 in advance, mould 2 diameter 1.2-2.0mm, length is 5mm, the diameter of platinum wire electrode 1 is 0.12mm, and the distance between two platinum wire electrodes 1 is 0.3mm, within 1.5-2.5 hour, can be solidified into solid foam material 80-120 DEG C of heating.Then after soaking 2-3 time with deionized water, at 90-110 DEG C of drying and dehydrating, the moisture inductor of novel transformer of the present invention oil is obtained.
Embodiment 3
First 7g polyvinyl alcohol (PVA) 1799 is dissolved in 93g water, be warming up to 65-70 DEG C, start stirring and dissolving polyvinyl alcohol (PVA), regulate the pH value of poly-vinyl alcohol solution between 1.8-2.0 with hydrochloric acid, be warming up between 75-80 DEG C, slowly add 37% formaldehyde 18g again, in 1.5 hours, drip formaldehyde, add rear insulation reaction 40 minutes.After adding dodecylbenzene sodium sulfonate 2.0g, accelerate to be stirred to 500-600 rev/min and form porous foams, obtained porous foams is injected the mould 2 being inserted with two platinum wire electrodes 1 in advance, mould 2 diameter 1.2-2.0mm, length is 5mm, the diameter of platinum wire electrode 1 is 0.12mm, and the distance between two platinum wire electrodes 1 is 0.2mm, within 1.5-2.5 hour, can be solidified into solid foam material 80-120 DEG C of heating.Then after soaking 2-3 time with deionized water, at 90-110 DEG C of drying and dehydrating, the moisture inductor of novel transformer of the present invention oil is obtained.
Claims (5)
1. the moisture inductor method for making of novel transformer oil, is characterized in that comprising the steps:
The first step, first by water-soluble for the polyvinyl alcohol (PVA) polyvinyl alcohol water solution made containing polyvinyl alcohol (PVA) 5-9%, regulate the pH value of poly-vinyl alcohol solution between 1.5-3 with hydrochloric acid, be warming up between 75-80 DEG C, slowly add 37% formaldehyde again, the consumption of formaldehyde accounts for the 20-30% of poly-vinyl alcohol solution weight, in 1.5-3.0 hour, drip formaldehyde, add rear insulation reaction 0.5-1.0 hour;
Second step, by the polyvinyl formal of above-mentioned preparation without separation, add high-speed stirred after surfactant and form porous foams, the consumption of surfactant accounts for the heavy 1.8-2.2% of whole material;
3rd step, obtained porous foams injected be inserted with the cylindrical mold of two platinum wire electrodes in advance, at 80-120 DEG C of heating 1.5-2.5 hour, be solidified into the solid foam material with platinum wire electrode;
4th step, the solid foam material with platinum wire electrode made is soaked in water after 2-3 time, at 90-110 DEG C of drying and dehydrating, obtains the moisture inductor of novel transformer of the present invention oil.
2. the moisture inductor method for making of novel transformer oil according to claim 1, it is characterized in that the diameter 1.2-2.0mm of mould, length is 5mm, and the diameter of platinum wire electrode is 0.1-0.15mm.
3. the moisture inductor method for making of novel transformer oil according to claim 1 and 2, is characterized in that the distance between two platinum wire electrodes is 0.2-0.5mm.
4. the moisture inductor method for making of novel transformer oil according to claim 1 and 2, it is characterized in that in second step, the stirring rate of high-speed stirred is 500-600 rev/min.
5. the moisture inductor method for making of novel transformer oil according to claim 3, it is characterized in that in second step, the stirring rate of high-speed stirred is 500-600 rev/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410838860.2A CN104502414A (en) | 2014-12-30 | 2014-12-30 | Method for manufacturing novel transformer oil water-containing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410838860.2A CN104502414A (en) | 2014-12-30 | 2014-12-30 | Method for manufacturing novel transformer oil water-containing sensor |
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| Publication Number | Publication Date |
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| CN104502414A true CN104502414A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410838860.2A Pending CN104502414A (en) | 2014-12-30 | 2014-12-30 | Method for manufacturing novel transformer oil water-containing sensor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745440A (en) * | 1980-09-02 | 1982-03-15 | Toshiba Corp | Ion selective electrode |
| CN1731164A (en) * | 2005-08-10 | 2006-02-08 | 中国科学院南京土壤研究所 | Impedance type soil moisture sensor and manufacture craft thereof |
| CN101382484A (en) * | 2008-06-24 | 2009-03-11 | 沈阳建筑大学 | Conductivity hydrogels composite material sensitized to humidity variation |
| CN102680546A (en) * | 2012-05-28 | 2012-09-19 | 合肥工业大学 | Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin |
-
2014
- 2014-12-30 CN CN201410838860.2A patent/CN104502414A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745440A (en) * | 1980-09-02 | 1982-03-15 | Toshiba Corp | Ion selective electrode |
| CN1731164A (en) * | 2005-08-10 | 2006-02-08 | 中国科学院南京土壤研究所 | Impedance type soil moisture sensor and manufacture craft thereof |
| CN101382484A (en) * | 2008-06-24 | 2009-03-11 | 沈阳建筑大学 | Conductivity hydrogels composite material sensitized to humidity variation |
| CN102680546A (en) * | 2012-05-28 | 2012-09-19 | 合肥工业大学 | Nickel ion electrochemical sensor and method for synthesizing electrode material chelating resin |
Non-Patent Citations (2)
| Title |
|---|
| 姜玉等: ""聚乙烯醇缩甲醛泡沫塑料的研究进展"", 《中国塑料》 * |
| 王安峰: ""聚乙烯醇缩甲醛吸水泡沫塑料的制备及性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20150408 |