CN108362076A - Transformer immersion oil quickly drying method - Google Patents
Transformer immersion oil quickly drying method Download PDFInfo
- Publication number
- CN108362076A CN108362076A CN201711433123.4A CN201711433123A CN108362076A CN 108362076 A CN108362076 A CN 108362076A CN 201711433123 A CN201711433123 A CN 201711433123A CN 108362076 A CN108362076 A CN 108362076A
- Authority
- CN
- China
- Prior art keywords
- tank body
- electrical heating
- heating tank
- immersion oil
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
Abstract
The present invention relates to transformer immersion oil quickly drying methods, by moisture more than in the defeated tank to heating in vacuum of old transformer immersion oil of specified value, pumping is carried out to heating in vacuum tank using vacuum pump so that the air pressure inside heating in vacuum tank is less than after 0.01Mpa is heated to 60 ± 2 DEG C, 70 ± 2 DEG C, 80 ± 2 DEG C by the liquid inside heating in vacuum tank again, and keeps 2 ~ 3min at a temperature of 60 ± 2 DEG C, 70 ± 2 DEG C, 80 ± 2 DEG C respectively；It is boiling evaporated into the characteristic of gas due to boiling point reduction under ultralow air pressure using water so that moisture evaporates rapidly, to complete the drying operation to old transformer immersion oil；The present invention can once complete water removal drying operation, and entire drying process is no more than 10 minutes, and rate of drying is fast, and need not replace drier so that drying process is simply, conveniently.
Description
Technical field
The present invention relates to transformer immersion oil quickly drying methods, belong to transformer technology field.
Background technology
Transformer immersion oil abbreviation transformer oil, is a kind of fraction products of oil, its main component is alkane, naphthene series
The compounds such as saturated hydrocarbons, aromatic series unsaturated hydrocarbons, the side's of being commonly called as canopy oil, light yellow clear liquid, relative density 0.895.Transformer
Oil be in natural oil by distillation, refining a kind of mineral oil obtained, be the lube cut in oil through acid-alkali refining
Processing obtains the mixture of small pure stabilization, viscosity, good insulating, the good liquid native hydrocarbon of cooling.
In the power system, most of power transformer is used in open-air atmosphere, since chronic sun exposure drenches with rain, in addition
Itself due to temperature change caused by the variation of load, make transformer it is inside and outside form draught head and caused by air flow, make
Moisture content enters in transformer.When moisture content reaches 100ppm ~ 200ppm or more, the dielectric strength of transformer oil can reduce, and can make
At breakdown, short circuit phenomenon, the safety of transformer and system is endangered.To solve this problem, current way is periodically to transformation
Device is detected, changes oil, and replaced transformer oil is carried out to remove water process.Current water-eliminating method is by oil by one
Filter with drier absorbs the moisture content in oil using drier, and is sampled in oil after treatment, carries out pin electrode and puts
Electrical testing, to determine the dielectric strength of transformer oil.After drier use, water imbibition can weaken, thus usually need to be into
Row is filtered for multiple times, tests, complicated for operation, and the quality problems easily caused by personnel operate reason.In addition, drier needs often more
It changes, so that working strength is increased, program complexity.
Invention content
The present invention is in view of the deficienciess of the prior art, provide transformer immersion oil quickly drying method, particular technique side
Case is as follows：
Transformer immersion oil quickly drying method, moisture is defeated more than the old transformer immersion oil of specified value to heating in vacuum tank
In, pumping is carried out to heating in vacuum tank using vacuum pump so that the air pressure inside heating in vacuum tank again will be true less than after 0.01Mpa
Liquid inside empty heating tank is heated to 60 ± 2 DEG C, and the air pressure of the heating in vacuum tank inside it is less than 0.01Mpa and inside
Temperature be 60 ± 2 DEG C under conditions of keep 2 ~ 3min；The liquid inside heating in vacuum tank is heated to 70 ± 2 DEG C again, it is described
The air pressure of heating in vacuum tank inside it less than 0.01Mpa and inside temperature be 70 ± 2 DEG C under conditions of keep 2 ~ 3min；Most
The liquid inside heating in vacuum tank is heated to 80 ± 2 DEG C afterwards, the air pressure of the heating in vacuum tank inside it is less than 0.01Mpa
And internal temperature be 80 ± 2 DEG C under conditions of keep 2 ~ 3min after obtain completed transformer immersion oil.
As an improvement of the above technical solution, the heating in vacuum tank includes electrical heating tank body, the electrical heating tank body
Top is provided with inlet valve, and the inlet valve is connected to electrical heating tank body, and pumping is additionally provided at the top of the electrical heating tank body
Valve, the extraction valve are connected to electrical heating tank body, and the bottom of the electrical heating tank body is provided with blow-off valve, the blow-off valve and electricity
Tank body connection is heated, minimum of three stabilizer blade, the upper end of the stabilizer blade and electrical heating tank are provided with below the electrical heating tank body
The bottom of body is fixedly connected；The electrical heating tank body is internally provided with non magnetic spring, iron block and anticollison block, described non magnetic
It is fixedly connected at the top of the upper end of spring and electrical heating tank body, more cross bars is installed on the outside of the non magnetic spring, it is described
It is fixedly connected at the top of the lower end of non magnetic spring and iron block, the anticollison block is arranged in the underface of iron block, the anticollison block
It is fixedly connected with the tank bottom of electrical heating tank body；Electromagnet is provided with below the electrical heating tank body, the electromagnet is located at anti-
The underface of collision block, is provided with interval between the electromagnet and the bottom of electrical heating tank body, the electromagnet is fixed with stabilizer blade
Connection controls the break-make of electromagnet center line loop current using time pulse relay.
As an improvement of the above technical solution, multiple through-holes are provided on the iron block.
As an improvement of the above technical solution, the company of being provided with restricts between the iron block and anticollison block, one end of the even rope
It is fixedly connected with iron block, the other end of the even rope is fixedly connected with anticollison block.
As an improvement of the above technical solution, the anticollison block and even rope are made of polytetrafluoroethylene (PTFE).
As an improvement of the above technical solution, it is additionally provided at the top of the electrical heating tank body for measuring electrical heating tank body
The vacuum meter of air pressure inside.
Beneficial effects of the present invention：It is boiling evaporated into the spy of gas due to boiling point reduction under ultralow air pressure using water
Property, old transformer immersion oil is carried out being evacuated to 0.01Mpa and is heated to 60 ~ 80 DEG C so that moisture evaporates rapidly, to complete
To the drying operation of old transformer immersion oil；The present invention can once complete water removal drying operation, and entire drying process is no more than 10 points
Clock, rate of drying is fast, and need not replace drier so that drying process is simply, conveniently.
Description of the drawings
Fig. 1 is heating in vacuum jar structure schematic diagram of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, the heating in vacuum tank includes electrical heating tank body 1, the top of the electrical heating tank body 1 be provided with into
Expect that valve 11, the inlet valve 11 are connected to electrical heating tank body 1, the top of the electrical heating tank body 1 is additionally provided with extraction valve 12, institute
It states extraction valve 12 to be connected to electrical heating tank body 1, the bottom of the electrical heating tank body 1 is provided with blow-off valve 13, the blow-off valve 13
It is connected to electrical heating tank body 1, the lower section of the electrical heating tank body 1 is provided with minimum of three stabilizer blade 14, the upper end of the stabilizer blade 14
It is fixedly connected with the bottom of electrical heating tank body 1, the top of the electrical heating tank body 1 is additionally provided with for measuring electrical heating tank body 1
The vacuum meter 15 of air pressure inside；The electrical heating tank body 1 is internally provided with non magnetic spring 2, iron block 3 and anticollison block 4, described
The upper end of non magnetic spring 2 is fixedly connected with the top of electrical heating tank body 1, and the outside of the non magnetic spring 2 is installed with more
The lower end of cross bar 21, the non magnetic spring 2 is fixedly connected with the top of iron block 3, and multiple through-holes are provided on the iron block 3
31, the anticollison block 4 is arranged in the underface of iron block 3, and the anticollison block 4 is fixedly connected with the tank bottom of electrical heating tank body 1；It is described
The lower section of electrical heating tank body 1 is provided with electromagnet 5, and the electromagnet 5 is located at the underface of anticollison block 4, the electromagnet 5 and electricity
It is provided with interval between the bottom of heating tank body 1, the electromagnet 5 is fixedly connected with stabilizer blade 14, is controlled using time pulse relay
The break-make of 5 center line loop current of electromagnet.
Moisture in old transformer immersion oil is detected, if its moisture is more than GB/T7595-2008《Transformation in operation
Device oil quality》In specified value then being connected to inlet valve 11 oil pump by moisture be more than the old of specified value by oil pump
Transformer immersion oil is defeated in electrical heating tank body 1, is then shut off inlet valve 11；Vacuum pump is connected with extraction valve 12, utilizes vacuum
It pumps and pumping is carried out to electrical heating tank body 1 so that the air pressure inside heating in vacuum tank is given less than after 0.01Mpa using time pulse relay
5 coil of electromagnet according to：Being powered 1 ~ 3 second, → → energization 1 ~ 3 second → power-off 3 ~ 5 seconds →...→ is powered 1 ~ 3 second for power-off 3 ~ 5 seconds
Order makes the intermittent energization of coil in electromagnet 5, magnetic force is will produce when the coil in electromagnet 5 is powered, in magnetic force
Under effect, iron block 3 can be adsorbed downwards, while non magnetic spring 2 is stretched, and non magnetic spring 2 can be same during stretching
Step drives the liquid inside 21 slamming down electrical heating tank body 1 of cross bar；Magnetic force is lost when the coil blackout in electromagnet 5,
Under the pulling force effect of non magnetic spring 2, iron block 3 can be pulled and be moved upwards, while non magnetic spring 2 starts retraction and restores, non-magnetic
Property spring 2 during retraction can synchronous drive cross bar 21 hit the liquid inside electrical heating tank body 1 upwards；Due to electromagnet
The intermittent energization of coil in 5, therefore iron block 3, non magnetic spring 2 and cross bar 21 can be realized and be pumped, in the mistake
Cheng Zhonghui persistently mixes liquid inside electrical heating tank body 1 so that between the levels of 1 internal liquid of electrical heating tank body
It can mix, be uniformly dispersed；Liquid inside heating in vacuum tank is heated to 60 ± 2 DEG C, the heating in vacuum tank is inside it
Air pressure less than 0.01Mpa and inside temperature be 60 ± 2 DEG C under conditions of keep 2 ~ 3min；It again will be inside heating in vacuum tank
Liquid is heated to 70 ± 2 DEG C, and the air pressure of the heating in vacuum tank inside it is 70 ± 2 less than the temperature of 0.01Mpa and inside
2 ~ 3min is kept under conditions of DEG C；The liquid inside heating in vacuum tank is finally heated to 80 ± 2 DEG C, the heating in vacuum tank exists
Its internal air pressure less than the temperature of 0.01Mpa and inside be 80 ± 2 DEG C under conditions of keep 2 ~ 3min after obtain finished product change
Depressor immersion oil.
In above process, it is boiling evaporated into the characteristic of gas due to boiling point reduction under ultralow air pressure using water, it is right
Old transformer immersion oil carries out vacuumize process, and moisture evaporates rapidly, then by vacuum pumped, the moisture content in old transformer immersion oil
It is removed, the transformer immersion oil after drying is discharged from blow-off valve 13, completes whole drying processes since then.
Under extremely low vacuum pressure effect, due to the old transformer immersion oil closer to extraction valve 12, moisture therein is got over
Fragile oil film and be precipitated, moisture evaporates rapidly, is then discharged by vacuum pump；And closer to the old transformation of 1 tank bottom of electrical heating tank body
Device immersion oil, moisture therein are more not easy to be precipitated, is extended so as to cause entire drying process.Usually shorten drying time, such as
Fruit on electrical heating tank body 1 by the way of installing agitating device additional, although can significantly shorten drying time, due to stirring
It can be because the problem of being rotatablely connected causes leakproofness limited, so that electrical heating tank body 1 is being taken out between paddle and electrical heating tank body 1
Defined vacuum degree is often not achieved when vacuum, in order to make up the defect, is necessarily needed between agitating paddle and electrical heating tank body 1
Better tightness, closer bearing are wanted, so that equipment cost significantly improves.If by the way of magnetic stirring apparatus come
Stirring, although the problem of not having leakproofness, present invention needs are evacuated at a temperature of 60 ~ 80 DEG C, it is well known that
High temperature can destroy the magnetic field of magnet, and temperature is excessively high or even can magnet be lost magnetism, and magnetic stirrer is at 60 ~ 80 DEG C
At a temperature of work stirrer magnetism can be caused weak, to ensure mixing effect, this necessarily makes the load of magnetic stirring apparatus notable
It improves, and the high-temperature stirring work at 60 ~ 80 DEG C can also reduce the service life of stirrer for a long time.And if using lower
Vacuum degree shortens drying time, less than the temperature of 0.003Mpa and inside is 70 ~ 80 in air pressure usually the case where not stirring
Need 30 ~ 50min that can complete the drying of old transformer immersion oil under conditions of DEG C；Air pressure less than 0.008Mpa and inside
Temperature needs the drying that 70 ~ 90min can complete old transformer immersion oil under conditions of being 70 ~ 80 DEG C；It is less than in air pressure
The temperature of 0.01Mpa and inside needs 130 ~ 160min that can complete the dry of old transformer immersion oil under conditions of being 70 ~ 80 DEG C
It is dry；And in order to shorten drying time, required vacuum degree is very small, needs to be less than 0.003Mpa, this needs performance preferably true
Sky pump could be completed, and usually such vaccum pump unit acquisition cost is very high.
And the present invention pumps since iron block 3, non magnetic spring 2 and cross bar 21 can be realized, it can be persistently to electricity
Transformer immersion oil inside heating tank body 1 is mixed so that energy between the levels of 1 internal transformer immersion oil of electrical heating tank body
Enough fully to mix, disperse, this is conducive to the drying time for shortening old transformer immersion oil, while which asking there is no leakproofness
Topic, simultaneously because being provided with interval between electromagnet 5 and the bottom of electrical heating tank body 1, electromagnet 5 will not be influenced by high temperature,
Even and if iron block 3 will not influence the magnetism of iron block 3 and the service life of iron block 3 for a long time in 60 ~ 80 DEG C of hot operation.
And the mode that the present invention also heats up in three times, this is conducive to the vacuum degree inside vacuum pump control electrical heating tank body 1, implements effect
Fruit is good.
Multiple through-holes 31 are provided on the iron block 3, the presence of through-hole 31 makes resistance of the iron block 3 when pumping
Power significantly reduces, this is conducive to improve iron block 3 and cross bar 21 and mixes liquid inside electrical heating tank body 1.Further, the iron
One end of the company's of being provided with rope 6 between block 3 and anticollison block 4, the even rope 6 is fixedly connected with iron block 3, the other end of the even rope 6
It is fixedly connected with anticollison block 4.The motion range that even rope 6 can control iron block 3 avoids disorderly hitting everywhere, while but also iron block 3 with
And the movement of non magnetic spring 2 is orderly, convenient for control.Non magnetic spring 2 is cannot be by using austenitic stainless steel, copper alloy etc.
The non-magnetic alloy material of magnet adsorption is made, and non magnetic spring 2 can not be adsorbed by electromagnet 5, this makes the suction of electromagnet 5
Attached to act only on iron block 3, non magnetic spring 2 will not interfere, to which pumping for iron block 3 is more easy to control and more
Orderly.The anticollison block 4 and even rope 6 is made of polytetrafluoroethylene (PTFE), polytetrafluoroethylene (PTFE) high temperature resistant, it is low temperature resistant, have it is good
Mechanical tenacity, it is corrosion-resistant, do not adhere to, nonhazardous, therefore anticollison block 4 and even rope 6 will not pollute transformer oil, while anticollison block 4
Also iron block 3 can be avoided to directly impinge the tank bottom of electrical heating tank body 1, the tank bottom of iron block 3 or electrical heating tank body 1 is also avoided to occur
Abrasion.
Further, in the surface electrodepositable nickel layer of iron block 3, nickel layer has ferromagnetism, does not interfere with electromagnet 5 and adsorbs iron
Block 3, and the aerial stability of nickel layer is very high, and metallic nickel has very strong passivation ability, and one is quickly generated in surface energy
The very thin passivating film of layer, can resist the corrosion of air, alkali and number acid.The hardness of nickel coating is relatively high, can improve iron block 3
Wearability.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. transformer immersion oil quickly drying method, it is characterised in that：Moisture is defeated more than the old transformer immersion oil of specified value
Into heating in vacuum tank, pumping is carried out so that the air pressure inside heating in vacuum tank is less than to heating in vacuum tank using vacuum pump
The liquid inside heating in vacuum tank is heated to 60 ± 2 DEG C again after 0.01Mpa, the air pressure of the heating in vacuum tank inside it is low
2 ~ 3min is kept under conditions of being 60 ± 2 DEG C in the temperature of 0.01Mpa and inside；The liquid inside heating in vacuum tank is heated again
To 70 ± 2 DEG C, the air pressure of the heating in vacuum tank inside it is less than the condition that the temperature of 0.01Mpa and inside is 70 ± 2 DEG C
2 ~ 3min of lower holding；Finally the liquid inside heating in vacuum tank is heated to 80 ± 2 DEG C, the heating in vacuum tank is inside it
Air pressure less than 0.01Mpa and inside temperature be 80 ± 2 DEG C under conditions of keep 2 ~ 3min after i.e. obtain completed transformer immersion oil.
2. transformer immersion oil quickly drying method according to claim 1, it is characterised in that：The heating in vacuum tank includes
Electrical heating tank body is provided with inlet valve at the top of the electrical heating tank body, and the inlet valve is connected to electrical heating tank body, the electricity
It is additionally provided with extraction valve at the top of heating tank body, the extraction valve is connected to electrical heating tank body, the bottom of the electrical heating tank body
It is provided with blow-off valve, the blow-off valve is connected to electrical heating tank body, and minimum of three branch is provided with below the electrical heating tank body
The upper end of foot, the stabilizer blade is fixedly connected with the bottom of electrical heating tank body；Being internally provided with for the electrical heating tank body is non magnetic
Spring, iron block and anticollison block are fixedly connected at the top of the upper end of the non magnetic spring and electrical heating tank body, the non magnetic bullet
It is installed with more cross bars on the outside of spring, is fixedly connected at the top of the lower end of the non magnetic spring and iron block, the anticollison block is set
It sets in the underface of iron block, the anticollison block is fixedly connected with the tank bottom of electrical heating tank body；It is set below the electrical heating tank body
It is equipped with electromagnet, the electromagnet is located at the underface of anticollison block, is arranged between the electromagnet and the bottom of electrical heating tank body
There are interval, the electromagnet to be fixedly connected with stabilizer blade, the break-make of electromagnet center line loop current is controlled using time pulse relay.
3. transformer immersion oil quickly drying method according to claim 2, it is characterised in that：It is provided on the iron block more
A through-hole.
4. transformer immersion oil quickly drying method according to claim 2, it is characterised in that：The iron block and anticollison block it
Between the company of being provided with restrict, it is described even rope one end be fixedly connected with iron block, it is described even restrict the other end be fixedly connected with anticollison block.
5. transformer immersion oil quickly drying method according to claim 4, it is characterised in that：The anticollison block and Lian Shengjun
It is made of polytetrafluoroethylene (PTFE).
6. transformer immersion oil quickly drying method according to claim 2, it is characterised in that：The top of the electrical heating tank body
Portion is additionally provided with the vacuum meter for measuring electrical heating tank interior air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433123.4A CN108362076A (en) | 2017-12-26 | 2017-12-26 | Transformer immersion oil quickly drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433123.4A CN108362076A (en) | 2017-12-26 | 2017-12-26 | Transformer immersion oil quickly drying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108362076A true CN108362076A (en) | 2018-08-03 |
Family
ID=63010201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711433123.4A Pending CN108362076A (en) | 2017-12-26 | 2017-12-26 | Transformer immersion oil quickly drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362076A (en) |
Citations (6)
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|---|---|---|---|---|
| CN101202154A (en) * | 2006-12-15 | 2008-06-18 | 陈欢 | Method for reconditioning power transformer oil |
| CN202422923U (en) * | 2011-12-14 | 2012-09-05 | 荥阳市电业局 | Restoring device for power transformer oil |
| CN206642637U (en) * | 2017-04-05 | 2017-11-17 | 韦尔斯润滑油(天津)有限公司 | A kind of lubricating oil homogeneous mediation kettle |
| CN206642671U (en) * | 2017-04-07 | 2017-11-17 | 云和漫行者玩具有限公司 | A kind of spinning sizing agent mixing arrangement with multidirectional disturbance function |
| CN206706081U (en) * | 2017-05-08 | 2017-12-05 | 安徽省应用技术研究院 | A kind of biological fermentation tank |
| CN107442015A (en) * | 2017-09-27 | 2017-12-08 | 龙里县逸轩生产力促进中心 | A kind of Electromagnetically vibrating chemical industry feed liquid agitation means |
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2017
- 2017-12-26 CN CN201711433123.4A patent/CN108362076A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202154A (en) * | 2006-12-15 | 2008-06-18 | 陈欢 | Method for reconditioning power transformer oil |
| CN202422923U (en) * | 2011-12-14 | 2012-09-05 | 荥阳市电业局 | Restoring device for power transformer oil |
| CN206642637U (en) * | 2017-04-05 | 2017-11-17 | 韦尔斯润滑油(天津)有限公司 | A kind of lubricating oil homogeneous mediation kettle |
| CN206642671U (en) * | 2017-04-07 | 2017-11-17 | 云和漫行者玩具有限公司 | A kind of spinning sizing agent mixing arrangement with multidirectional disturbance function |
| CN206706081U (en) * | 2017-05-08 | 2017-12-05 | 安徽省应用技术研究院 | A kind of biological fermentation tank |
| CN107442015A (en) * | 2017-09-27 | 2017-12-08 | 龙里县逸轩生产力促进中心 | A kind of Electromagnetically vibrating chemical industry feed liquid agitation means |
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| 韩薇薇编: "《NS大揭秘有趣的磁学》", 31 January 2014 * |
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Application publication date: 20180803 |
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