CN204809010U - Online remove device of active sulfur in insulating oil of operation power transformer - Google Patents
Online remove device of active sulfur in insulating oil of operation power transformer Download PDFInfo
- Publication number
- CN204809010U CN204809010U CN201520638664.0U CN201520638664U CN204809010U CN 204809010 U CN204809010 U CN 204809010U CN 201520638664 U CN201520638664 U CN 201520638664U CN 204809010 U CN204809010 U CN 204809010U
- Authority
- CN
- China
- Prior art keywords
- oil
- filter
- pump
- transformer
- active sulfur
- 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.)
- Expired - Fee Related
Links
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 41
- 239000011593 sulfur Substances 0.000 title claims abstract description 41
- 239000003463 adsorbent Substances 0.000 claims abstract description 41
- 230000018044 dehydration Effects 0.000 claims abstract description 27
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 abstract description 128
- 238000000034 method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 239000010724 circulating oil Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 13
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- AQMRBJNRFUQADD-UHFFFAOYSA-N copper(I) sulfide Chemical compound [S-2].[Cu+].[Cu+] AQMRBJNRFUQADD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Treatment Of Liquids With Adsorbents In General (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model provides an online remove device of active sulfur in insulating oil of operation power transformer, relates to the transformer field. The utility model discloses a solving the current method of getting rid of active sulfur material in the transformer that adopts chemistry or physics, need stopping transport the transformer, the processing time is longer moreover, can cause the problem of huge current supply loss. Filtering oil pump, adsorbent jar, filter, oil heater, vacuum dehydration deaerator and circulating oil pump and looping through the oil pipe connection from left to right, voltage -controlled switching system is provided with the adsorbent in the adsorbent jar on filtering the oil pipe between oil pump and the adsorbent jar, and the oil inlet that filters the oil pump passes through oil pipe to be connected with the transformer, and the oil -out of circulating oil pump passes through oil pipe to be connected with the transformer, and the vacuum pump is connected with the vacuum dehydration deaerator. The utility model is used for the transformer.
Description
Technical field
The utility model relates to field transformer, is specifically related to the online removal device of active sulfur in the electric power transformer insulated oil of a kind of operation.
Background technology
In insulating oil, active sulfur refers to and can react with metals such as copper, iron, silver and cause the sulphur-containing substance of corrosion of metals, as elemental sulfur, hydrogen sulfide, mercaptan and thioether etc. under certain condition.In transformer, in insulating oil, active sulfur and winding material (copper) react generation cuprous sulfide, because cuprous sulfide has conductive characteristic, and wire insulation paper can be penetrated into, wire insulation intensity is weakened gradually, cause transformer turn-to-turn insulation to puncture the most at last, transformer coil burns, and the accident causing transformer to burn occurs.
In recent years, the power transformer caused because of active sulfur in insulating oil both at home and abroad and reactor burning damage accident frequently occur, and cause significant damage to power network safety operation, therefore must take measures to eliminate or suppress the harm of active sulfur.
At present, eliminate or suppress the method for active sulfur harm in transformer oil to mainly contain to change oil, add passivator and remove active sulfur three kinds of methods.Changing oil is change the transformer oil with sulfur corrosion into do not have sulfur corrosion oil, and this method can solve the harm of active sulfur, but due to the oil mass of transformer comparatively large, therefore change oil costly.Adding the corrosivity that triazole copper passivator effectively can suppress sulphur, is the method for conventional a kind of control transformer oil sulfur corrosion.Can be removed the active sulfur material in transformer oil by chemical method or physisorphtion, be applied in production scene at present, but need transformer to stop transport due to this method, and the processing time is longer, therefore can cause the huge loss of supply.
Utility model content
The utility model is solve the existing method adopting active sulfur material in the removal transformer of chemistry or physics, transformer is needed to stop transport, and the processing time is longer, the problem of the huge loss of supply can be caused, and then propose the online removal device of active sulfur in the electric power transformer insulated oil of a kind of operation.
The utility model is the technical scheme taked that solves the problem: a kind ofly run the online removal device of active sulfur in electric power transformer insulated oil and comprise filtration oil pump, adsorbent tank, filter, oil heater, vacuum dehydration degasser, oil circulating pump, vacuum pump and votage control switch, filter oil pump, adsorbent tank, filter, oil heater, vacuum dehydration degasser is connected by oil pipe from left to right successively with oil circulating pump, votage control switch is arranged on the oil pipe between filtration oil pump and adsorbent tank, adsorbent is provided with in adsorbent tank, the oil-in filtering oil pump is connected with transformer by oil pipe, the oil-out of oil circulating pump is connected with transformer by oil pipe, vacuum pump is connected with vacuum dehydration degasser.
The beneficial effects of the utility model are: use the utility model to be arranged in operating transformer, on-line desulphurization is carried out to the active sulfur in insulating oil, structure is simple, easy and simple to handle, the insulating oil in operating transformer enters adsorbent tank, after the sulphur-containing substance in oil is removed by adsorbent by filtering oil pump, via oil heater and vacuum dehydration degasser, reduce the content of W/O and air, then enter in transformer by oil circulating pump pressurization backflow, complete the desulfurization processing procedure of insulating oil.Under the condition of transformer of not stopping transport, online Transformatin is carried out to the active sulfur of oil in transformer, and the security of operation of transformer can not be affected, avoid the loss of supply.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model, and Fig. 2 is the schematic diagram of the utility model control circuit.
Embodiment
Embodiment one: composition graphs 1 and Fig. 2 illustrate present embodiment, in the electric power transformer insulated oil of a kind of operation described in present embodiment, the online removal device of active sulfur comprises filtration oil pump 1, adsorbent tank 2, filter 3, oil heater 4, vacuum dehydration degasser 5, oil circulating pump 6, vacuum pump 7 and votage control switch 14, filter oil pump 1, adsorbent tank 2, filter 3, oil heater 4, vacuum dehydration degasser 5 is connected by oil pipe from left to right successively with oil circulating pump 6, votage control switch 14 is arranged on the oil pipe between filtration oil pump 1 and adsorbent tank 2, adsorbent is provided with in adsorbent tank 2, the oil-in filtering oil pump 1 is connected with transformer 15 by oil pipe, the oil-out of oil circulating pump 6 is connected with transformer 15 by oil pipe, vacuum pump 7 is connected with vacuum dehydration degasser 5.
In the utility model, filter oil pump 1, adsorbent tank 2, filter 3, vacuum dehydration degasser 5 and oil circulating pump 6 and be stainless steel, avoid the active sulfur in insulating oil and these containers to react.
Installing four in adsorbent tank 2 can the filter core of filled with adsorbent, and each filter core volume is 25L, filter core precision≤20 μm, maximum operating pressure differential≤0.35MPa, runs and bears pressure≤1.535MPa.
The maximum operating pressure differential of filter 3 is 0.35MPa.
Oil heater 4 adopts the mode of indirect, is provided with heating tube in oil heater 4, and heating tube is carbon fibre materials, and heating tube surface temperature is 300 ~ 380 DEG C, and heat exchanger tube is stainless steel, and heat exchange area is 15.6m
2, heating power is 15kW, and after heating, oil temperature reaches 40 ~ 60 DEG C.
Vacuum dehydration degasser 5 is folding spiral-flow type structure; Double evaporation-cooling interlayer: vacuum filler (the 60mm bed of material); Dischargeable capacity is 60L.
Vacuum pump 7 is twin-stage rotary vane type, brings solenoid back to; Flow: 2 ~ 70L/s; Limiting pressure is 6 × 10
-2~ 6 × 10
-1pa; Working vacuum degree is 0.06 ~ 0.09MPa.
Votage control switch 14 is stainless steel; Pressure limit :-0.1 ~ 1.0MPa; Pressure precision: ± 0.005MPa; For single-pole single-throw(SPST is often opened.
The oil pipe of the oil-in of filtration oil pump 1 is provided with valve C1, oil pipe between filter 3 and oil heater 4 is provided with valve C2, oil pipe between vacuum dehydration degasser 5 and oil circulating pump 6 is provided with valve C3, the oil pipe of the oil-out of oil circulating pump 6 is provided with valve C4, valve C1, valve C2, valve C3 and valve C4 are stainless steel ball valve.
Filter oil pump 1 to be arranged in parallel with valve V1, filter on the oil pipe between oil pump 1 and adsorbent tank 2 and be provided with valve V2, adsorbent tank 2 is provided with valve V3, the oil pipe of the oil-out of oil circulating pump 6 is also provided with valve V4, valve V4 is arranged on the right side of valve C4, and valve V1, valve V2, valve V3 and valve V4 are stainless steel needle-valve.
The oil pipe of the oil-out of oil circulating pump 6 is also provided with check-valves S1, prevents insulating oil from flowing backwards, check-valves S1 is outstanding Qi Shizhi, and nominal pressure is 2.5MPa.
Controller circuitry part of the present utility model mainly comprises power supply, CPU, RS232 serial ports, flow collection control circuit, pressure signal acquisition control circuit, temperature signal collection control circuit, liquid level signal acquisition control circuit and touch screen circuitry eight parts, and its control circuit system as shown in Figure 2.CPU adopt high-performance, low-power consumption 8 AVR microprocessors, realizing circuit system components contact and coordinate work.Power unit adopts adjusting and voltage-reduction switch power supply chip, respectively outside 12V voltage transitions is become 5V and the 3.3V operating voltage needed for circuit board; Signals collecting control circuit adopt chip be applicable high-acruracy survey application low-power consumption, low noise, full simulation front end, be integrated with low noise instrument amplifier in sheet, directly can gather small-signal; Touch-screen adopts intelligent display terminal 4.3 cun of true color liquid crystal display screens, and the resolution of 480 × 272, supports multiple text formatting, 4 wire resistive touchscreen, RS232 serial communication.
Embodiment two: composition graphs 1 and Fig. 2 illustrate present embodiment, filter 3 described in present embodiment comprises grade one filter 3-1 and secondary filter 3-2, and grade one filter 3-1 and secondary filter 3-2 is successively set between adsorbent tank 2 and oil heater 4 from left to right.Grade one filter 3-1 and secondary filter 3-2 is stainless steel, and detachably arrange, the filtering accuracy of grade one filter 3-1 is 3 μm, and the filtering accuracy of secondary filter 3-2 is 1 μm, adopt and filter step by step, for retaining from adsorbent tank 2 particulate matter out.Other compositions are identical with embodiment one with annexation.
Embodiment three: composition graphs 1 and Fig. 2 illustrate present embodiment, filters described in present embodiment on oil pump 1 and is provided with overflow valve 8, vacuum dehydration degasser 5 is provided with vacuum meter 13.Setting like this, overflow valve 8 is stainless steel, opening pressure position 1.0MPa, and recovery pressure position 0.8MPa, plays the effect of level pressure overflow effect and safeguard protection, and vacuum meter 13 is used for measuring the vacuum degree in vacuum dehydration degasser 5.Other compositions are identical with embodiment two with annexation.
Embodiment four: composition graphs illustrates present embodiment, is provided with oil liquid level meter 9 in vacuum dehydration degasser 5 described in present embodiment.Oil liquid level meter 9 is stainless steel, adopts teletransmission magnetic convertible; Measuring range is 0 ~ 1.4m; Certainty of measurement is ± 10mm.Other compositions are identical with embodiment one with annexation.
Embodiment five: composition graphs 1 and Fig. 2 illustrate present embodiment, the oil pipe described in present embodiment between oil heater 4 and vacuum dehydration degasser 5 is provided with temperature sensor 10.The measuring range of temperature sensor 10 is-15 DEG C ~ 150 DEG C, and certainty of measurement is ± 0.5 DEG C.Other compositions are identical with embodiment four with annexation.
Embodiment six: composition graphs 1 and Fig. 2 illustrate present embodiment, in the electric power transformer insulated oil of a kind of operation described in present embodiment, the online removal device of active sulfur also comprises three Pressure gauges 11, filters between oil pump 1 and adsorbent tank 2, is respectively arranged with a Pressure gauge 11 between adsorbent tank 2 and grade one filter 3-1 and between secondary filter 3-2 and oil heater 4.Setting like this, can realize the force value detecting each position on oil pipe in real time, avoiding device breaks down.The pressure filtered between oil pump 1 and adsorbent tank 2 in pipeline should be less than 0.8MPa, and the pressure between adsorbent tank 2 and grade one filter 3-1 in pipeline is less than 0.6MPa, and the pressure between secondary filter 3-2 and oil heater 4 in pipeline should be less than 0.6MPa.Other compositions are identical with embodiment one with annexation.
Embodiment seven: composition graphs 1 and Fig. 2 illustrate present embodiment, in the electric power transformer insulated oil of a kind of operation described in present embodiment, the online removal device of active sulfur also comprises two flowmeters 12, a described flowmeter 12 is arranged on the oil pipe between filtration oil pump 1 and adsorbent tank 2, and described in another, flowmeter 12 is arranged on the oil pipe between oil circulating pump 6 and transformer.Flowmeter 12 is the explosion-proof flowmeter of intelligent telemetering type elliptic gear, and all steel material, range of flow is 0.5 ~ 60.0L/min.Other compositions are identical with embodiment one with annexation.
Operation principle
One, after on-line desulphurization device is connected with transformer cooling system oil pipe line, open C3 and V2, slowly open V1, the oil stream flow entering adsorbent tank 2 is adjusted, make the flow control of oil stream at 1.0 ~ 2.0L/min, on the adsorbent allowing oil slowly soak in adsorbent tank 2, and the air in filter 3 is discharged by V3.V2 and V1 is closed immediately when V3 has oil to flow out.
Two, the controller of desulfurizer is placed in " manually ", start and filter oil pump 1 and vacuum pump 7, opened oil strain pump 1 outlet valve V3, adjustment oil stream flow is 30 ~ 40L/min, start oil heater 4 after 2 minutes, oil is flowed temperature and control within the scope of 40 ~ 50 DEG C.
Three, open C3, C4 and V4, after the oil liquid level in vacuum dehydration degasser reaches 0.75m, start oil circulating pump, oil after treatment in dehydration degasser is sent back in transformer.Adjustment V4, controls oil circulating pump 6 rate of discharge as identical with filtration oil pump 1 rate of discharge.
Four, after device is stable (about 5min), be placed in " automatically " by Setup Controller, device then enters auto-controll operation state: after the oil liquid level in vacuum dehydration degasser 5 reaches 0.75m, starts oil circulating pump 6; After the oil liquid level in vacuum dehydration degasser 5 is lower than 0.35m, stop oil circulating pump 6; After the oil liquid level in vacuum dehydration degasser 5 reaches 1.25m, stop filtering oil pump 1.The startup again of filtering oil pump 1 needs manual operation.
Five, the running time of device is relevant with the active sulfur content of operating transformer, usually needs operation 8 ~ 10 oily cycle periods.
By the operation of this device, under the state can not stopped transport at transformer, online Transformatin is carried out to the active sulfur in its insulating oil.Such as, certain 500kV Substation No.1 main transformer is that Ukraine's production in 1998 is dispatched from the factory, and its transformer oil weight is 54.6t, and the sulfur corrosion of oil is heavy corrosion, and in oil, total sulfur content is 856mg/L.In August, 2014, this transformer has been installed a set of on-line desulphurization device, and operating flux is 35L/min, run after 215 hours, in transformer, insulating oil total sulfur content is down to 315mg/L, and the adsorbent having more sulphur component to be desulfurized in device is removed, and the sulfur corrosion of oil disappears.
Claims (7)
1. one kind is run the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: in the electric power transformer insulated oil of a kind of operation, the online removal device of active sulfur comprises filtration oil pump (1), adsorbent tank (2), filter (3), oil heater (4), vacuum dehydration degasser (5), oil circulating pump (6), vacuum pump (7) and votage control switch (14), filter oil pump (1), adsorbent tank (2), filter (3), oil heater (4), vacuum dehydration degasser (5) is connected by oil pipe from left to right successively with oil circulating pump (6), votage control switch (14) is arranged on the oil pipe between filtration oil pump (1) and adsorbent tank (2), adsorbent tank is provided with adsorbent in (2), the oil-in filtering oil pump (1) is connected with transformer (15) by oil pipe, the oil-out of oil circulating pump (6) is connected with transformer (15) by oil pipe, vacuum pump (7) is connected with vacuum dehydration degasser (5).
2. one according to claim 1 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: filter (3) comprises grade one filter (3-1) and secondary filter (3-2), grade one filter (3-1) and secondary filter (3-2) are successively set between adsorbent tank (2) and oil heater (4) from left to right.
3. one according to claim 2 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: filter on oil pump (1) and be provided with overflow valve (8).
4. one according to claim 1 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: in vacuum dehydration degasser (5), be provided with oil liquid level meter (9), vacuum dehydration degasser (5) is provided with vacuum meter (13).
5. one according to claim 4 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: the oil pipe between oil heater (4) and vacuum dehydration degasser (5) is provided with temperature sensor (10).
6. one according to claim 1 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: in the electric power transformer insulated oil of a kind of operation, the online removal device of active sulfur also comprises three Pressure gauges (11), filter between oil pump (1) and adsorbent tank (2), between adsorbent tank (2) and grade one filter (3-1) and between secondary filter (3-2) and oil heater (4), be respectively arranged with a Pressure gauge (11).
7. one according to claim 1 runs the online removal device of active sulfur in electric power transformer insulated oil, it is characterized in that: in the electric power transformer insulated oil of a kind of operation, the online removal device of active sulfur also comprises two flowmeters (12), a described flowmeter (12) is arranged on the oil pipe between filtration oil pump (1) and adsorbent tank (2), and flowmeter described in another (12) is arranged on the oil pipe between oil circulating pump (6) and transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520638664.0U CN204809010U (en) | 2015-08-21 | 2015-08-21 | Online remove device of active sulfur in insulating oil of operation power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520638664.0U CN204809010U (en) | 2015-08-21 | 2015-08-21 | Online remove device of active sulfur in insulating oil of operation power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204809010U true CN204809010U (en) | 2015-11-25 |
Family
ID=54593790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520638664.0U Expired - Fee Related CN204809010U (en) | 2015-08-21 | 2015-08-21 | Online remove device of active sulfur in insulating oil of operation power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204809010U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452472A (en) * | 2017-07-24 | 2017-12-08 | 国网江苏省电力公司电力科学研究院 | The in-situ processing device of active sulfur in a kind of transformer oil |
| CN109603312A (en) * | 2019-01-25 | 2019-04-12 | 广东电网有限责任公司 | A kind of insulating oil active sulfur removing filter plate |
| CN111085034A (en) * | 2019-11-30 | 2020-05-01 | 江苏万标检测有限公司 | Efficient online oil filtering method for transformer insulating oil |
-
2015
- 2015-08-21 CN CN201520638664.0U patent/CN204809010U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452472A (en) * | 2017-07-24 | 2017-12-08 | 国网江苏省电力公司电力科学研究院 | The in-situ processing device of active sulfur in a kind of transformer oil |
| CN109603312A (en) * | 2019-01-25 | 2019-04-12 | 广东电网有限责任公司 | A kind of insulating oil active sulfur removing filter plate |
| CN111085034A (en) * | 2019-11-30 | 2020-05-01 | 江苏万标检测有限公司 | Efficient online oil filtering method for transformer insulating oil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Guoxing Inventor after: Jiang Ziqiu Inventor after: Wang Zhiwei Inventor after: Chi Jingyuan Inventor after: Guan Yanling Inventor after: Fu Lijun Inventor after: Zhang Liang Inventor before: Li Guoxing Inventor before: Jiang Ziqiu Inventor before: Chi Jingyuan Inventor before: Guan Yanling Inventor before: Fu Lijun Inventor before: Zhang Liang |
|
| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20180821 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |