CN103871715A - Transformer oil circulation purifier - Google Patents
Transformer oil circulation purifier Download PDFInfo
- Publication number
- CN103871715A CN103871715A CN201410114362.3A CN201410114362A CN103871715A CN 103871715 A CN103871715 A CN 103871715A CN 201410114362 A CN201410114362 A CN 201410114362A CN 103871715 A CN103871715 A CN 103871715A
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- CN
- China
- Prior art keywords
- oil
- pipe
- screen pipe
- transformer
- valve
- 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.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000012535 impurity Substances 0.000 claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 73
- 238000004140 cleaning Methods 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010724 circulating oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Filtration Of Liquid (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention discloses a transformer oil circulation purifier which is characterized by comprising a filter pipe, an oil inlet pipe and an oil outlet pipe. The filter pipe comprises an oil inlet filter pipe detachably connected with the oil inlet pipe, and an oil outlet filter pipe detachably connected with the oil outlet pipe, wherein the oil inlet filter pipe is detachably connected with the oil outlet filter pipe. The oil inlet pipe is provided with a first valve, and the oil outlet pipe is provided with a second valve. A filter screen for filtering impurities is arranged in the oil inlet filter pipe, the filter screen is sunken towards the oil outlet side to form a sunken portion for containing the impurities, and a first permanent magnet and a second permanent magnet used for adsorbing scrap iron are arranged in the oil outlet filter pipe or arranged outside the oil outlet filter pipe in a sleeved mode. An oil release device is arranged at the bottom of the filter pipe. The filter can carry out thorough filtration on transformer oil and then protect a transformer; in the using process of an oil tank of a transformer, the filter pipe can be disassembled for being cleaned, so channels will not be blocked.
Description
Technical field
The present invention relates to field transformer, especially relate to a kind of transformer oil circulation purifier.
Background technology
Transformer in use can discharge a large amount of heats, for reducing the heat of transformer, transformer can be placed in to the oil tank of transformer that transformer oil is housed, and absorbs the heat of the release of transformer by transformer oil, and then reduces the temperature of transformer; And in order to reduce the heat of transformer oil, also can on oil tank of transformer, connect heat sink, transformer oil is passed in heat sink and lowered the temperature.
Oil tank of transformer is through polishing by polylith iron plate, knock, the modes such as welding combine, in its manufacture process, can produce the impurity such as a large amount of iron filings, and people only can brush several times with hairbrush conventionally before use, then a wiping uses cloth to wipe with, the impurity such as iron filings cannot be removed clean, packing into after transformer oil simultaneously, along with the work of heat sink, transformer oil can be taken the impurity such as the iron filings in oil tank of transformer out of, if cleaning not in time, enter in transformer and can damage transformer, affect the use of transformer, even burn transformer, and oil tank of transformer in use, remove inconvenient, and the impurity such as iron filings are very many, what have is also very little, remove very difficult.
Summary of the invention
The present invention, in order to overcome the deficiencies in the prior art, provides one can in the time that heat radiation makes, clean impurity, and the cool cycles oil strainer of blocking channel not.
To achieve these goals, the present invention is by the following technical solutions: a kind of transformer oil circulation purifier, it is characterized in that: comprise screen pipe, oil inlet pipe and flowline, described screen pipe comprise the oil-feed screen pipe that removably connects with oil inlet pipe and with the flowline fuel-displaced screen pipe that removably connects, between oil-feed screen pipe and fuel-displaced screen pipe, removably connect; Described oil inlet pipe is provided with the first valve, and flowline is provided with the second valve; In oil-feed screen pipe, be provided with the screen pack of impurity screening, screen pack is recessed to form to a fuel-displaced side recess that holds impurity, and in or beyond fuel-displaced screen pipe, side is arranged with the first permanent magnet and second permanent magnet of absorption iron filings; Screen pipe bottom is provided with jettison gear.
As preferably, described oil-feed screen pipe is positioned at described screen pack oil-feed one side and forms and hold the holding tank that exceeds the outer impurity of screen pack.
As preferably, described the first permanent magnet and described the second permanent magnet are arcuate structure, and radian scope is 30 °-150 °.
On described oil-feed screen pipe, with described fuel-displaced screen pipe junction, be provided with cannelure along inwall one circle, described screen pack is located in this cannelure.
As preferably, also comprise liquid current relay.
As preferably, described oil inlet pipe and described oil-feed screen pipe junction are provided with oil-feed sealing ring, and described fuel-displaced screen pipe and described flowline junction are provided with fuel-displaced sealing ring, between oil-feed screen pipe and fuel-displaced screen pipe, are provided with intermediate seal circle.
As preferably, described the first valve and described oil inlet pipe junction are provided with the first sealing ring, and described the second valve and described flowline junction are provided with the second sealing ring.
As preferably, described the first valve and the second valve are butterfly valve.
As preferably, described jettison gear is sealing plug or sealing bolt.
Operation principle: described filter is clean impurity in transformer oil heat radiation process, transformer circulating oil filter is located between oil tank of transformer and heat abstractor, for the oil-feed of oil tank of transformer, be provided with screen pack, can filter out the impurity that oil tank of transformer inner volume is larger, and permanent magnet is set, can adsorb the iron filings of the small size that screen pack cannot filter, and this arranges and can automatically filter impurity such as the iron filings in oil tank of transformer, filter without manual operation, avoid the impurity such as iron filings to enter transformer, and valve is set, when cleaning, only need valve-off, pull down screen pipe, cleaned out again and again loaded onto.
In sum, the present invention has the following advantages: can filter thoroughly transformer oil, and then transformer played to the effect of protection, also can pull down screen pipe and clear up in oil tank of transformer use procedure, ensure not blocking channel.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is A-A face structural representation in Fig. 1.
Fig. 3 is filter screen structure schematic diagram of the present invention.
Embodiment
In order to make those skilled in the art person better understand the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description.
As Figure 1-3, a kind of transformer oil circulation purifier, comprise liquid current relay 6, screen pipe 1, oil inlet pipe 2 and flowline 3, described liquid current relay 6 is located on screen pipe 1, this liquid current relay is set, can the transformer oil flow in pipeline is measured and be shown, convenient observation, thereby impurity level in prediction screen pipe, then determine whether screen pipe is cleaned; Described screen pipe 1 comprises oil-feed screen pipe 12 and fuel-displaced screen pipe 13, oil-feed screen pipe 12 removably connects with oil inlet pipe 2, fuel-displaced screen pipe 13 removably connects with flowline 3, between oil-feed screen pipe 12 and fuel-displaced screen pipe 13, removably connect, this removable filter pipe is set, conveniently it is cleared up, and screen pipe is set as to dismountable fuel-displaced screen pipe and oil-feed screen pipe, cleaning gets up to be more prone to, more thorough; Described oil inlet pipe 2 and oil-feed screen pipe 12 junctions are provided with oil-feed sealing ring, flowline 3 is provided with fuel-displaced sealing ring with fuel-displaced screen pipe 13 junctions, between oil-feed screen pipe 12 and fuel-displaced screen pipe 13, be provided with intermediate seal circle 15, above-mentioned sealing ring is set, strengthened sealing effectiveness; Described oil inlet pipe 2 is provided with the first valve 8, flowline 3 is provided with the second valve 9, the first valve 8 is provided with the first sealing ring with oil inlet pipe 2 junctions, described the second valve 9 is provided with the second sealing ring with flowline 3 junctions, described the first valve and the second valve are butterfly valve, certainly can also be break valve, gate valve etc., the opening and closing of convenience valve control flowline and oil inlet pipe passage are set, sealing ring is set and strengthen the sealing effectiveness between valve and oil inlet pipe and flowline.
Further, in described oil-feed screen pipe 12, be provided with the screen pack 11 of impurity screening, this screen pack can filter out the impurity such as the iron filings that volume is larger, concrete, described screen pack 11 is recessed to form to a fuel-displaced side recess that holds impurity, the shape of this recess can be multiple, as truncated cone-shaped, terrace with edge shape etc., and in the present embodiment, described screen pack 11 is pyramidal structure, screen pack 11 comprises tip and openend, openend is oil inlet end, openend is fixing by installing ring and screen pipe 12, on installing ring, be provided with vertically brace rod, this brace rod works to screen pack 11 effect of making, avoid screen pack 11 because of transformer oil flow rock, the screen pack of this shape can stop a large amount of impurity, not blocking channel of while, can be by installing ring and the integrally welded structure of oil-feed screen pipe 12, realize fixing screen pack, and in the present embodiment, on described oil-feed screen pipe 12, with fuel-displaced screen pipe 13 junctions, be provided with cannelure along inwall one circle, described installing ring is located in this cannelure, this is arranged on when clean, desirable go out screen pack clear up, clear up more thorough, in order further to increase impurity saturation, described oil-feed screen pipe 12 is positioned at screen pack 11 oil-feed one sides and forms a holding tank 14, and this holding tank, for settling the impurity that exceeds screen pack, avoids impurity too much to stop up screen pipe.Screen pipe 1 bottom is provided with jettison gear 7, concrete, this jettison gear is located at holding tank 14 bottom surfaces, described jettison gear is sealing bolt, also can be sealing plug, close after the first valve 8 and the second valve 9, pull down jettison gear, can emit the transformer oil in screen pipe 1, the dismounting of convenient screen pipe.
Concrete, on fuel-displaced screen pipe 13, permanent magnet 5 is set, the first permanent magnet 51 that this permanent magnet 5 comprises and the second permanent magnet 52, the magnetic in the middle of being greater than according to the magnetic of physical principle magnet end, is divided into two and strengthens its magnetic; In other embodiments, the first permanent magnet 51 and the second permanent magnet 52 can be arranged on fuel-displaced screen pipe 13 inwalls, on fuel-displaced screen pipe 13 inwalls, two holddown grooves are set, then the first permanent magnet 51 and the second permanent magnet 52 are arranged on respectively in holddown groove, this arranges and can prevent that permanent magnet 5 from moving with transformer oil; And in the present embodiment, described the first permanent magnet 51 and the second permanent magnet 52 all curved, and be all located at the periphery of fuel-displaced screen pipe, the small size iron filings that this permanent magnet energy adsorption filter screen cannot filter out are set, the suction iron filings of permanent magnet are effective; The present embodiment adopts installation permanent magnet mode to be more prone to, convenient production, and do not affect the circulation of transformer in flowline; Further, the first permanent magnet 51 of described arc and the radian of the second permanent magnet 52 are all made as 60 °; Certainly, the radian of the first permanent magnet 51 and the second permanent magnet 52 can also be 30 °-59 ° or 61 °-150 °, and the magnetic force that the magnet formation within the scope of this radian is set is strong, is conducive to adsorb iron filings.
Concrete, the flange that is connected to of described oil inlet pipe 2 and oil-feed screen pipe 12 is connected, and flowline 3 is connected with the flange that is connected to of fuel-displaced screen pipe 13, and fuel-displaced screen pipe 13 is connected also for flange connects with oil-feed screen pipe 12; And the connected mode of the first valve 8 and oil inlet pipe 2 and the second valve 9 are with the connected mode of flowline 3 also for flange is connected, and this connected mode is installed firmly, convenient disassembly.
Described filter is clean impurity in transformer oil heat radiation process, transformer circulating oil filter is located between oil tank of transformer and heat abstractor, can be used for the oil-feed of oil tank of transformer, also can be for oil tank of transformer fuel-displaced, screen pack and permanent magnet double filtration are set, be provided with screen pack, can filter out the impurity that oil tank of transformer inner volume is larger, and permanent magnet is set, can adsorb the iron filings of the small size that screen pack cannot filter, can automatically filter impurity such as the iron filings in oil tank of transformer, filter without manual operation, and being set, valve can control the passage of closing screen pipe two ends, when cleaning, only need valve-off, pull down screen pipe, cleaned out again and again loaded onto, open valve, avoid the impurity such as iron filings to enter in transformer, damage transformer, and then transformer is played to the effect of protecting, in oil tank of transformer use procedure, also can pull down screen pipe clears up simultaneously, ensure not blocking channel.
In the time that described filter is used for the oil-feed of oil tank of transformer, oil inlet pipe 2 is connected with heat abstractor, flowline 3 is connected with oil tank of transformer, its filter process: in the time that the transformer oil in oil tank of transformer carries out circulation cooling, transformer oil motion drives the impurity such as iron filings to arrive in heat abstractor and dispel the heat from flowline, and the transformer oil after heat radiation drives impurity to enter the oil inlet pipe 2 that filter is housed; The impurity that volume is larger is filtered net 11 stop after, be deposited in holding tank, the iron filings of small volume pass screen pack 11 with transformer oil, arrive the fuel-displaced one end of screen pipe 1, adsorbed by the first permanent magnet 51 and the second permanent magnet 52, the transformer oil after filter 11 filters is got back in oil tank of transformer from flowline 3; Observe the flow velocity of the transformer oil that liquid current relay 6 shows simultaneously, in the time that transformer flow velocity is too low, need clear up filter.And by filter during for oil tank of transformer fuel-displaced, oil inlet pipe is connected with oil tank of transformer, flowline is connected with heat abstractor, and its filter process is similar during to oil-feed for oil tank of transformer.
Scale removal process: first close the first valve 8 and the second valve 9, end flowing of the interior transformer oil of pipeline, then the oil discharge screw of back-outing, the transformer oil in screen pipe 1 is emitted, turn on again screen pipe 1 two ends and the sealing bolt that oil inlet pipe 2 and flowline 3 are connected, unload screen pipe 1; Take off permanent magnet 5, iron filings are cleaned out, then screen pipe is split into oil-feed screen pipe 12 and fuel-displaced screen pipe 13, take off screen pack 11, thoroughly clean; After having cleared up, then oil discharge screw is tightened, screen pack 11 reinstalls oil-feed screen pipe 12, oil-feed screen pipe 12 is reinstalled into screen pipe 1 with fuel-displaced screen pipe 13, the two ends of screen pipe 1 are connected with oil inlet pipe 2 and flowline 3 respectively, and the oil discharge screw of screwing on, completes the installation after cleaning; Reopen the first valve 8 and the second valve 9, transformer oil flows through filter, and filter restarts to filter.
Obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
Claims (9)
1. a transformer oil circulation purifier, it is characterized in that: comprise screen pipe (1), oil inlet pipe (2) and flowline (3), described screen pipe (1) comprise the oil-feed screen pipe (12) that removably connects with oil inlet pipe (2) and with flowline (3) the fuel-displaced screen pipe (13) that removably connects, between oil-feed screen pipe (12) and fuel-displaced screen pipe (13), removably connect; Described oil inlet pipe (2) is provided with the first valve (8), and flowline (3) is provided with the second valve (9); In oil-feed screen pipe (12), be provided with the screen pack (11) of impurity screening, screen pack (31) is recessed to form to a fuel-displaced side recess that holds impurity, and in or beyond fuel-displaced screen pipe (13), side is arranged with the first permanent magnet (51) and second permanent magnet (52) of absorption iron filings; Screen pipe (1) bottom is provided with jettison gear (7).
2. transformer oil circulation purifier according to claim 1, is characterized in that: described oil-feed screen pipe (12) is positioned at described screen pack (11) oil-feed one side formation and holds the holding tank (14) that exceeds the outer impurity of screen pack.
3. the transformer oil circulation purifier of stating according to claim 1, is characterized in that: described the first permanent magnet (51) and described the second permanent magnet (52) are arcuate structure, and radian scope is 30 °-150 °.
4. transformer oil circulation purifier according to claim 1, is characterized in that: on described oil-feed screen pipe (12), with described fuel-displaced screen pipe (13) junction, be provided with cannelure along inwall one circle, described screen pack (11) is located in this cannelure.
5. transformer oil circulation purifier according to claim 1, is characterized in that: also comprise liquid current relay (6).
6. transformer oil circulation purifier according to claim 1, it is characterized in that: described oil inlet pipe (2) is provided with oil-feed sealing ring with described oil-feed screen pipe (12) junction, described fuel-displaced screen pipe (13) is provided with fuel-displaced sealing ring with described flowline (3) junction, between oil-feed screen pipe (12) and fuel-displaced screen pipe (13), is provided with intermediate seal circle (15).
7. transformer oil circulation purifier according to claim 1, it is characterized in that: described the first valve (8) is provided with the first sealing ring with described oil inlet pipe (2) junction, described the second valve (9) is provided with the second sealing ring with described flowline (3) junction.
8. transformer oil circulation purifier according to claim 1, is characterized in that: described the first valve (8) and the second valve (9) are butterfly valve.
9. transformer oil circulation purifier according to claim 1, is characterized in that: described jettison gear (7) is sealing plug or sealing bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410114362.3A CN103871715B (en) | 2014-03-26 | 2014-03-26 | transformer oil circulation purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410114362.3A CN103871715B (en) | 2014-03-26 | 2014-03-26 | transformer oil circulation purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103871715A true CN103871715A (en) | 2014-06-18 |
| CN103871715B CN103871715B (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410114362.3A Active CN103871715B (en) | 2014-03-26 | 2014-03-26 | transformer oil circulation purifier |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465284A (en) * | 2015-12-07 | 2016-04-06 | 陈伟 | Split-flow output type cycloid reduction box of shield machine |
| CN105508520A (en) * | 2015-12-30 | 2016-04-20 | 陈伟 | Flow-dividing output type air cooling cycloidal speed reduction box of soil pressure balance shield machine |
| CN105546049A (en) * | 2015-11-30 | 2016-05-04 | 陈伟 | Shunt output-type water-cooling cycloid reduction gearbox for earth pressure balance shield machine |
| CN105576536A (en) * | 2015-12-16 | 2016-05-11 | 中船重工海博威（江苏）科技发展有限公司 | Immersion oil processing apparatus for power transmission of single-point mooring system |
| CN105632835A (en) * | 2014-12-03 | 2016-06-01 | 郑州大学 | Two-position high-voltage load switch |
| CN105889195A (en) * | 2016-05-12 | 2016-08-24 | 张华芳 | Method for treating hydraulic oil by adopting electrification, separation, electric hammer adsorption and rotating magnetic fields |
| CN107904340A (en) * | 2017-11-23 | 2018-04-13 | 莫宝兰 | A kind of magnetic slag cooling device |
| CN108579145A (en) * | 2018-05-23 | 2018-09-28 | 盐城派威机械有限公司 | A kind of new-type fuel tank filter and filter method |
| CN110867304A (en) * | 2019-11-29 | 2020-03-06 | 常熟市友邦散热器有限责任公司 | Filter element fin type radiator |
| CN112474039A (en) * | 2020-11-02 | 2021-03-12 | 李健 | Magnetic filtering device for transformer oil purification |
| CN115023277A (en) * | 2020-03-06 | 2022-09-06 | 舍弗勒技术股份两合公司 | External magnetic filter assembly |
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| CN203839166U (en) * | 2014-03-26 | 2014-09-17 | 浙江江山特种变压器有限公司 | Circulatory purifier for transformer oil |
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| CN87210289U (en) * | 1987-07-14 | 1988-04-06 | 罗固事 | Transformer oil regenerating device while operating |
| EP0566776A2 (en) * | 1992-04-18 | 1993-10-27 | Daimler-Benz Aerospace Aktiengesellschaft | Process and equipment for oil cleaning |
| DE4320711A1 (en) * | 1993-06-23 | 1995-01-05 | Peter Rusbuelt | Process for cleaning transformers |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632835A (en) * | 2014-12-03 | 2016-06-01 | 郑州大学 | Two-position high-voltage load switch |
| CN105632835B (en) * | 2014-12-03 | 2018-06-15 | 郑州大学 | A kind of two station high voltage load switches |
| CN105546049A (en) * | 2015-11-30 | 2016-05-04 | 陈伟 | Shunt output-type water-cooling cycloid reduction gearbox for earth pressure balance shield machine |
| CN105465284A (en) * | 2015-12-07 | 2016-04-06 | 陈伟 | Split-flow output type cycloid reduction box of shield machine |
| CN105576536B (en) * | 2015-12-16 | 2018-01-12 | 中船重工海博威（江苏）科技发展有限公司 | A kind of immersion oil processing unit for single point mooring system transmission of electricity |
| CN105576536A (en) * | 2015-12-16 | 2016-05-11 | 中船重工海博威（江苏）科技发展有限公司 | Immersion oil processing apparatus for power transmission of single-point mooring system |
| CN105508520A (en) * | 2015-12-30 | 2016-04-20 | 陈伟 | Flow-dividing output type air cooling cycloidal speed reduction box of soil pressure balance shield machine |
| CN105889195A (en) * | 2016-05-12 | 2016-08-24 | 张华芳 | Method for treating hydraulic oil by adopting electrification, separation, electric hammer adsorption and rotating magnetic fields |
| CN107904340A (en) * | 2017-11-23 | 2018-04-13 | 莫宝兰 | A kind of magnetic slag cooling device |
| CN108579145A (en) * | 2018-05-23 | 2018-09-28 | 盐城派威机械有限公司 | A kind of new-type fuel tank filter and filter method |
| CN110867304A (en) * | 2019-11-29 | 2020-03-06 | 常熟市友邦散热器有限责任公司 | Filter element fin type radiator |
| CN115023277A (en) * | 2020-03-06 | 2022-09-06 | 舍弗勒技术股份两合公司 | External magnetic filter assembly |
| CN115023277B (en) * | 2020-03-06 | 2023-11-07 | 舍弗勒技术股份两合公司 | External magnetic filter assembly |
| CN112474039A (en) * | 2020-11-02 | 2021-03-12 | 李健 | Magnetic filtering device for transformer oil purification |
| CN112474039B (en) * | 2020-11-02 | 2022-10-28 | 长春三鼎变压器有限公司 | Magnetic filtering device for purifying transformer oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103871715B (en) | 2016-02-03 |
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Address after: 324104, Jiang He industrial corridor No. 137, Qing Lake junction, Jiangshan, Zhejiang, Quzhou Applicant after: Zhejiang Proview Electric Applicance Co., Ltd Address before: 324104, Jiang He industrial corridor No. 137, Qing Lake junction, Jiangshan, Zhejiang, Quzhou Applicant before: Zhejiang Jiangshan Special Transformer Co., Ltd. |
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