CN107424757A - A kind of environmentally friendly oil-filled transformer - Google Patents
A kind of environmentally friendly oil-filled transformer Download PDFInfo
- Publication number
- CN107424757A CN107424757A CN201710338181.2A CN201710338181A CN107424757A CN 107424757 A CN107424757 A CN 107424757A CN 201710338181 A CN201710338181 A CN 201710338181A CN 107424757 A CN107424757 A CN 107424757A
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- Prior art keywords
- oil
- fuel tank
- environmentally friendly
- inner casing
- filled transformer
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/105—Cooling by special liquid or by liquid of particular composition
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
A kind of environmentally friendly oil-filled transformer, including tank envelope, fuel tank inner casing, iron core and winding positioned at fuel tank inner casing center, the oil purifier of cavity is formed positioned at iron core and winding both sides and with shell side wall in fuel tank and in fuel tank, denoising device between shell, denoising device includes noise reduction interlayer and cooling sandwith layer, noise reduction interlayer uses cellular glass cotton plate, it is nearest apart from noise source, noise can be effectively absorbed, and the diffusion of some fiber fines can be avoided in fuel tank, reduce environmental pollution, cooling sandwith layer is between oil purifier and noise reduction interlayer, the temperature of transformer oil can be effectively reduced；Oil purifier is the purifier that forces being located in fuel tank, including the first clarifier of filtering nonmetallic inclusion and the second clarifier for adsorbing metal impurity, does not carry out air exchange with the external world, therefore can improve the degree of purity of transformer oil；It is mutually coordinated between two devices, noise reduction, absolute oil and the effect of cooling can be taken into account, there are good environmental protection and energy saving.
Description
Technical field
The present invention relates to field transformer, relates generally to a kind of environmentally friendly oil-filled transformer.
Background technology
Transformer is one of indispensable capital equipment in power plant and electric substation, and dry type can be roughly divided into by the type of cooling
Transformer, oil-filled transformer, fluorochemical transformer, oil-filled transformer is mainly by iron core, winding, fuel tank, conservator, insulation sleeve
The composition such as pipe, shunting switch and gas relay, but problems be present in actual use in transformer：
（1）Oil tank of transformer side is fitted with greatly oil purifier at present, the cyclic absorption oil for passing through oil using built-in adsorbent
In moisture, sour matter and metallic impurity, with reach maintain transformer oil cleaning, extend transformer service life purpose, but
The shortcomings that such device is for stable transformer, and the temperature difference of the transformer oil of fuel tank middle and upper part and bottom is not
It is very big, the convection current being internally formed is very slow, and circularly purifying is ineffective；In addition it is in conventional oil purifier to be arranged to adsorb more
Agent, have the function that to purify transformer oil by adsorption filtration, extend service life of transformer oil, but adsorbent does not possess absorption
The effect of metallic impurity, it is impossible to transformer oil is thoroughly cleaned, and needs to be changed after its absorption reaches saturation, but more
Changing adsorbent needs to put the transformer oil in fuel tank totally, and operation inconvenience, while wastes transformer oil；
（2）Transformer operationally, because alternating magnetic field produces periodicity alternation active force to iron core and coil and causes vibrations,
And fuel tank is delivered to by iron core folder and feet etc. and produces very big noise, influence the daily life of nearby residents；With society
The reinforcement of meeting environmental consciousness, perception and understanding and control of the people to noise are increasingly strict, also have some means to be used to drop at present
Noise caused by low transformer, such as installs soundproof wall in transformer room, and the sound-absorbing materials such as porous felt, fiber rock wool are pasted
On the wall and on ceiling, or make sound absorption block and hang over interior, although the method has certain effect, but floor space increases
Greatly, cost is high, and the fiber of the material such as felt, fiber rock wool is tiny brittle, forms dust pollution meeting after fracture in atmosphere
Cause environmental pollution or even cause worker's unsmooth breath.
The content of the invention
In order to solve the above technical problems, the present invention is to provide a kind of environmentally friendly oil-filled transformer, denoising device is built-in with
And oil purifier, it is mutually coordinated between two devices, noise reduction, absolute oil and the effect of cooling can be taken into account, there is good environmental protection section
Can property.
The technical solution adopted in the present invention is：A kind of environmentally friendly oil-filled transformer, including tank envelope, fuel tank inner casing,
Positioned at fuel tank inner casing center iron core and winding, positioned at iron core and winding both sides and with fuel tank shell side wall formed cavity absolute oil
Device and the denoising device between the inside and outside shell of fuel tank, described tank envelope top is provided with conservator and oil pump, described
Denoising device includes two interlayers, respectively noise reduction interlayer and cooling sandwith layer, and described noise reduction interlayer is located at fuel tank shell most
Outer layer, including multilayer insulation block of glass wool and the cooling tube that is placed between adjacent insulation block of glass wool, described cooling sandwith layer
Between oil purifier and noise reduction interlayer, it is interconnected between described cooling tube and cooling sandwith layer and is each filled with Phase cooling
Liquid, and by setting circulating pump to move Phase cooling liquid recycle stream；
Described oil purifier includes closure I, the stationary barrier being vertically set at the top of fuel tank inner casing, is connected with stationary barrier
And it is vertically fixed on the first purification in the side wall for going out oil screen, being fixed on fuel tank inner casing and stationary barrier of fuel tank inner shell bottom
Device and the second clarifier, the closure II that can coordinate with closure I is equipped with the top of the inside and outside shell of described fuel tank, it is described
The through hole that two oil inlet pipes that fuel feeding pillow separates pass through is equipped with closure I and closure II, the first described clarifier is set
Below closure I, including for filter nonmetallic inclusion large aperture filter screen, first under the filter screen of large aperture it is porous every
Plate and the adsorbent being placed between large aperture filter screen and the first porous barrier, the second described clarifier are located at the first clarifier
Lower section, including the second porous barrier and be placed between the first porous barrier and the second porous barrier be used for adsorbing metal it is miscellaneous
The magnet of matter.
Preferably, the aperture of the first described porous barrier is less than the size of adsorbent, and described second is porous
The aperture of dividing plate is less than the size of magnet.
Preferably, the aperture of described large aperture filter screen is 50 ~ 200 mesh, and the described aperture for going out oil screen is
200 ~ 500 mesh.
Preferably, it is provided with valve on described oil inlet pipe.
Preferably, each surface of described fuel tank inner casing inwall is provided with uniform arc convex, raised
Highly it is 2 ~ 3mm.
Preferably, the wall thickness of described tank envelope and inner casing is 8 ~ 10mm.
Preferably, described heat-protecting glass cotton intralamellar part is in cellular, and it is 2 ~ 4 layers to set the number of plies.
Preferably, described cooling tube is engaged with heat-protecting glass cotton plate, and it is 1 ~ 3 to set number, and multiple
It is interconnected between cooling tube.
Preferably, the bottom of described tank envelope is provided with shock-absorbing protecting set, is set in the lower section of shock-absorbing protecting set
There are 4 heelpieces.
Preferably, the material of described shock-absorbing protecting set and heelpiece is high-elastic flexible material, on described heelpiece
It is provided with fixed earthing screw.
The beneficial effects of the invention are as follows：
A kind of environmentally friendly oil-filled transformer of the present invention, is built-in with denoising device and oil purifier, oil purifier therein
To force purifier, installed in fuel tank internal, the multiple purifying device being convenient for changing inside is set, does not carry out air friendship with the external world
Change, the degree of purity of transformer oil can be improved；Denoising device includes noise reduction interlayer and cooling sandwith layer, and noise reduction interlayer uses cellular glass
Cotton plate, it is nearest apart from noise source, noise can be effectively absorbed, and the diffusion of some fiber fines can be avoided in fuel tank,
Reduce environmental pollution, cooling sandwith layer can be effectively reduced the temperature of transformer oil；It is mutually coordinated between two devices, drop can be taken into account
Make an uproar, the effect of absolute oil and cooling, there are good environmental protection and energy saving, its advantage is in particular in：
（1）The conventional oil purifier of in the market is generally located on the outside of fuel tank, the cyclic absorption oil that built-in adsorbent passes through oil
In moisture, sour matter and metallic impurity, with reach maintain transformer oil cleaning, extend transformer service life purpose, so
And the temperature difference of the transformer oil of fuel tank middle and upper part and bottom is not very big, the convection current being internally formed is very slow, circularly purifying
It is ineffective, the present invention by oil purifier be arranged on fuel tank madial wall on, by oil pump formed forced circulation purify mechanism, one
It is that can completely cut off outside air and steam, reduces the pollution of transformer oil, second, the purification efficiency of transformer oil can be improved；
（2）It is in the conventional oil purifier of in the market to be arranged to adsorbent more, purification transformer oil is reached by adsorption filtration, extends change
The effect of depressor oil service life, purification process is divided into two processes of absorption and filtering by the present invention, provided with the first clarifier, the
Two clarifiers and go out oil screen, the first clarifier is installed at the top of oil purifier, including large aperture filter screen, filter positioned at large aperture
First porous barrier off the net and the adsorbent being placed between large aperture filter screen and the first porous barrier, the above are net first
Chemical industry sequence, for purifying moisture and nonmetallic inclusion in transformer oil；The second clarifier is provided with below the first clarifier, is wrapped
The magnet for including the second porous barrier and being placed between the first porous barrier and the second porous barrier, the above are that second purifies work
Sequence, for purifying the metal impurities in transformer oil；Oil screen is provided with out below the second clarifier, for the 3rd purification work
Sequence, farthest improve the degree of purity of transformer oil；
（3）The conventional oil purifier of in the market, need to put the transformer oil in fuel tank totally when changing adsorbent, operation to be had not
Just, while transformer oil is wasted, oil purifier of the present invention, the valve of oil inlet pipe can be closed, open oil purifier top
The lid in portion, takes out filter screen, dividing plate and adsorbent are cleaned, changed, and can be repeatedly after the metal impurities on magnet are removed
Use, and the Renewal process of the present invention, without the oil in transformer is put totally, the purifier of porous hollow out can be by transformation
Device oil further takes out replacing after draining only, and the purpose thoroughly purified is reached while transformer oil is not wasted；
（4）Denoising device is arranged in fuel tank by the present invention, including two interlayers, respectively noise reduction interlayer and cooling sandwith layer, drop
Interlayer make an uproar by using cellular glass cotton plate, including noise receives caused by iron core, will closely avoid noise to external diffusion,
But it is the cooling for not influenceing transformer oil in fuel tank, adjacent because cellular glass cotton plate has good heat insulation effect
Cooling tube is additionally provided between cellular glass cotton plate, the cooling tube connects with cooling sandwith layer, by cooling tube and cooling sandwith layer
It is interior to be full of Phase cooling liquid, the temperature that be effectively reduced between cellular glass cotton plate, and one is formed around transformer oil
Individual cryosphere, noise caused by iron core can also be reduced while not influenceing or even the radiating effect of increase transformer oil；
（5）The present invention is provided with shock-absorbing protecting set outside transformer shell, can be by metal shell by selecting high-elastic flexible material
The cut-off that is rigidly connected between ground, while 4 heelpieces are provided with the lower section of shock-absorbing protecting set, play certain sound-absorbing effect
Fruit, noise is operatively avoided to be delivered to by housing in ground and air；
（6）The inside and outside wall of fuel tank of transformer is carried out thickening processing by the present invention, can play certain noise blocking effect, together
When coarse processing is carried out to inner wall of oil tank surrounding, some arc convex, excessively smooth wall, easily generation are provided with its surface
Echo increases the volume of noise, by that sound wave can be made to produce repeatedly refraction internal coarse processing, effectively weakens noise.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, not
Form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of environmentally friendly oil-filled transformer；
Fig. 2 is the structural representation of denoising device；
Fig. 3 is the overall structure diagram of oil purifier；
Fig. 4 is the partial structural diagram of oil purifier；
Reference：1st, tank envelope, 101, conservator, 102, oil pump, 103, oil inlet pipe, 104, closure II, 105, valve,
106th, shock-absorbing protecting set, 107, heelpiece, 108, earthing screw, 2, fuel tank inner casing, 201, arc convex, 3, oil purifier, 301,
Closure I, 302, stationary barrier, 303, go out oil screen, 4, denoising device, 5, noise reduction interlayer, 501, heat-protecting glass cotton plate, 502,
Cooling tube, 503, circulating pump, 6, cooling sandwith layer, 601, Phase cooling liquid, the 7, first clarifier, 701, large aperture filter screen, 702,
First porous barrier, 703, adsorbent, the 8, second clarifier, the 801, second porous barrier, 802, magnet, 9, iron core and winding.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the present invention accompanying drawing,
Technical scheme is clearly and completely described embodiment.The solution of the present invention is described in detail with reference to specific embodiment：
A kind of environmentally friendly oil-filled transformer, including tank envelope 1, fuel tank inner casing 2, the iron core positioned at the center of fuel tank inner casing 2 and around
Group 9, positioned at iron core and the both sides of winding 9 and with the side wall of fuel tank inner casing 2 form the oil purifier 3 of cavity and inside and outside positioned at fuel tank
Denoising device 4 between shell, the described top of tank envelope 1 are provided with conservator 101 and oil pump 102, and described denoising device 4 includes
Two interlayers, respectively noise reduction interlayer 5 and cooling sandwith layer 6, described noise reduction interlayer 5 are located at the outermost layer of fuel tank shell, including
Multilayer insulation block of glass wool 501 and the cooling tube 502 being placed between adjacent insulation block of glass wool 501, described cooling sandwith layer 6
Between oil purifier 3 and noise reduction interlayer 5, it is interconnected between described cooling tube 502 and cooling sandwith layer 6 and is each filled with phase
Become coolant, and by setting circulating pump 503 to move Phase cooling liquid recycle stream；
Described oil purifier 3 includes closure I 301, the stationary barrier 302 for being vertically set on the top of fuel tank inner casing 2, with fixing
Dividing plate 302 is connected and is vertically fixed on the side wall for going out oil screen 303, being fixed on fuel tank inner casing 2 and the fixation of the bottom of fuel tank inner casing 2
The first clarifier 7 and the second clarifier 8 on dividing plate 302, being equipped with the top of the inside and outside shell of described fuel tank can be with closure I
301 closures II 104 coordinated, two that fuel feeding pillow 101 separates are equipped with described closure I 301 and closure II 104
The through hole that oil inlet pipe 103 passes through, the first described clarifier 7 are located at the lower section of closure I 301, including nonmetallic miscellaneous for filtering
The large aperture filter screen 701 of matter, the first porous barrier 702 under large aperture filter screen 701 and be placed on large aperture filter screen 701 with
Adsorbent 703 between first porous barrier 702, the second described clarifier 8 are located at the lower section of the first clarifier 7, including
Two porous barriers 801 and it is placed between the first porous barrier 702 and the second porous barrier 801 and is used for adsorbing metal impurity
Magnet 802.
Preferably, the aperture of the first described porous barrier 702 is less than the size of adsorbent 703, and described the
The aperture of two porous barriers 801 is less than the size of magnet 802.
Preferably, the aperture of described large aperture filter screen 701 is 50 ~ 200 mesh, described to go out oil screen 303
Aperture is 200 ~ 500 mesh.
Preferably, it is provided with valve 105 on described oil inlet pipe 103.
Preferably, each surface of the described inwall of fuel tank inner casing 2 is provided with uniform arc convex 201, convex
The height risen is 2 ~ 3mm.
Preferably, the wall thickness of described tank envelope 1 and inner casing 2 is 8 ~ 10mm.
Preferably, the described inside of heat-protecting glass cotton plate 501 is in cellular, and it is 2 ~ 4 layers to set the number of plies.
Preferably, described cooling tube 502 is engaged with heat-protecting glass cotton plate 501, and it is 1 ~ 3 to set number,
And it is interconnected between multiple cooling tubes 502.
Preferably, the bottom of described tank envelope 1 is provided with shock-absorbing protecting set 106, under shock-absorbing protecting set
Side is provided with 4 heelpieces 107.
Preferably, the material of described shock-absorbing protecting set 106 and heelpiece 107 is high-elastic flexible material, described
Fixed earthing screw 108 is provided with heelpiece 107.
A kind of environmentally friendly oil-filled transformer of the present invention, the cleaning of its oil purifier and Renewal process are as follows：
A kind of environmentally friendly oil-filled transformer provided by the present invention, can be to oil purifier 3 after oil purifier uses a period of time
Interior porous barrier, filter screen, adsorbent and magnet is cleaned and changed, and now needs the valve first closed on oil inlet pipe 103
105, and the closure at the top of fuel tank inner casing, shell and oil purifier is opened, by positioned at the large aperture filter screen on the top of oil purifier 3
701 take out, and clean up, then the adsorbent that adsorbent 703 is taken out and more renewed, and then further take out magnet 802 and remove it
The metal impurities of upper adhesion, it can finally check whether oil screen 303 is blocked and cleaning is changed in time, it is each after handling completely
Individual component is installed in oil-feed tank successively again, and good seal closure.
Embodiments described above is the part of the embodiment of the present invention, rather than whole embodiments.Based on being retouched
The embodiments of the invention stated, those of ordinary skill in the art are obtained every other on the premise of without creative work
Embodiment, belong to the scope of protection of the invention.
Claims (10)
1. a kind of environmentally friendly oil-filled transformer, including tank envelope（1）, fuel tank inner casing（2）, positioned at fuel tank inner casing（2）Center
Iron core and winding（9）, positioned at iron core and winding（9）Both sides and with fuel tank inner casing（2）Side wall forms the oil purifier of cavity（3）With
And the denoising device between the inside and outside shell of fuel tank（4）, described tank envelope（1）Top is provided with conservator（101）And oil pump
（102）, it is characterised in that described denoising device（4）Including two interlayers, respectively noise reduction interlayer（5）And cooling sandwith layer
（6）, described noise reduction interlayer（5）Positioned at the outermost layer of fuel tank shell, including multilayer insulation block of glass wool（501）Be placed on phase
Adjacent heat-protecting glass cotton plate（501）Between cooling tube（502）, described cooling sandwith layer（6）Positioned at oil purifier（3）Pressed from both sides with noise reduction
Layer（5）Between, described cooling tube（502）With cooling sandwith layer（6）Between be interconnected and be each filled with Phase cooling liquid（601）,
And by setting circulating pump（503）Make Phase cooling liquid（601）Circulate；
Described oil purifier（3）Including closure I（301）, be vertically set on fuel tank inner casing（2）The stationary barrier at top
（302）With stationary barrier（302）It is connected and is vertically fixed on fuel tank inner casing（2）Bottom goes out oil screen（303）, be fixed on oil
Case inner casing（2）Side wall and stationary barrier（302）On the first clarifier（7）With the second clarifier（8）, in described fuel tank,
Being equipped with the top of shell can be with closure I（301）The closure II of cooperation（104）, described closure I（301）And sealing
Lid II（104）On be equipped with fuel feeding pillow（101）Two oil inlet pipes separated（103）The through hole passed through, the first described clarifier
（7）It is located at closure I（301）Lower section, including for filtering the large aperture filter screen of nonmetallic inclusion（701）, positioned at large aperture filter
Net（701）Under the first porous barrier（702）Be placed on large aperture filter screen（701）With the first porous barrier（702）Between
Adsorbent（703）, described the second clarifier（8）It is located at the first clarifier（7）Lower section, including the second porous barrier（801）
Be placed on the first porous barrier（702）With the second porous barrier（801）Between the magnet for adsorbing metal impurity
（802）.
A kind of 2. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that the first described porous barrier
（702）Aperture be less than adsorbent（703）Size, the second described porous barrier（801）Aperture be less than magnet（802）'s
Size.
A kind of 3. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described large aperture filter screen
（701）Aperture be 50 ~ 200 mesh, described goes out oil screen（303）Aperture be 200 ~ 500 mesh.
A kind of 4. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described oil inlet pipe（103）On
It is provided with valve（105）.
A kind of 5. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described fuel tank inner casing（2）It is interior
Each surface of wall is provided with uniform arc convex（201）, raised height is 2 ~ 3mm.
A kind of 6. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described tank envelope（1）With
Inner casing（2）Wall thickness be 8 ~ 10mm.
A kind of 7. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described heat-protecting glass cotton plate
（501）Inside is in cellular, and it is 2 ~ 4 layers to set the number of plies.
A kind of 8. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described cooling tube（502）With
Heat-protecting glass cotton plate（501）It is engaged, it is 1 ~ 3 to set number, and multiple cooling tubes（502）Between be interconnected.
A kind of 9. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described tank envelope（1）'s
Bottom is provided with shock-absorbing protecting set（106）, 4 heelpieces are provided with the lower section of shock-absorbing protecting set（107）.
A kind of 10. environmentally friendly oil-filled transformer according to claim 1, it is characterised in that described shock-absorbing protecting set
（106）And heelpiece（107）Material be high-elastic flexible material, described heelpiece（107）On be provided with fixed earthing screw
（108）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338181.2A CN107424757B (en) | 2017-05-15 | 2017-05-15 | Environment-friendly oil immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338181.2A CN107424757B (en) | 2017-05-15 | 2017-05-15 | Environment-friendly oil immersed transformer |
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| Publication Number | Publication Date |
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| CN107424757A true CN107424757A (en) | 2017-12-01 |
| CN107424757B CN107424757B (en) | 2023-05-09 |
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| CN108674177A (en) * | 2018-08-13 | 2018-10-19 | 天津开发区天盈企业有限公司 | A kind of novel energy-saving emission-reducing fuel tank |
| CN109058359A (en) * | 2018-10-17 | 2018-12-21 | 哈尔滨工业大学 | Phase-change temperature control fluid damper |
| CN110265208A (en) * | 2019-07-04 | 2019-09-20 | 江苏恒屹变压器有限公司 | A kind of oil-immersed transformer being convenient to clean oil duct |
| CN110718369A (en) * | 2019-10-28 | 2020-01-21 | 镇江金能电力科技有限公司 | Explosion-proof isolation transformer |
| CN108674177B (en) * | 2018-08-13 | 2024-06-07 | 天津开发区天盈企业有限公司 | Novel energy-saving oil-reducing oil tank |
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| CN108674177A (en) * | 2018-08-13 | 2018-10-19 | 天津开发区天盈企业有限公司 | A kind of novel energy-saving emission-reducing fuel tank |
| CN108674177B (en) * | 2018-08-13 | 2024-06-07 | 天津开发区天盈企业有限公司 | Novel energy-saving oil-reducing oil tank |
| CN109058359A (en) * | 2018-10-17 | 2018-12-21 | 哈尔滨工业大学 | Phase-change temperature control fluid damper |
| CN110265208A (en) * | 2019-07-04 | 2019-09-20 | 江苏恒屹变压器有限公司 | A kind of oil-immersed transformer being convenient to clean oil duct |
| CN110265208B (en) * | 2019-07-04 | 2024-04-19 | 江苏恒屹变压器股份有限公司 | Oil immersed transformer convenient to clearance oil duct |
| CN110718369A (en) * | 2019-10-28 | 2020-01-21 | 镇江金能电力科技有限公司 | Explosion-proof isolation transformer |
| CN110718369B (en) * | 2019-10-28 | 2022-06-07 | 镇江金能电力科技有限公司 | Explosion-proof isolation transformer |
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| CN107424757B (en) | 2023-05-09 |
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