CN113977434A - Cleaning device applied to on-load voltage regulation tap switch of transformer - Google Patents
Cleaning device applied to on-load voltage regulation tap switch of transformer Download PDFInfo
- Publication number
- CN113977434A CN113977434A CN202111393994.4A CN202111393994A CN113977434A CN 113977434 A CN113977434 A CN 113977434A CN 202111393994 A CN202111393994 A CN 202111393994A CN 113977434 A CN113977434 A CN 113977434A
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- China
- Prior art keywords
- oil
- transformer
- cleaning
- oiling
- sump
- 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
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 70
- 238000005498 polishing Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000000746 purification Methods 0.000 claims description 18
- 238000010079 rubber tapping Methods 0.000 claims description 12
- 239000004519 grease Substances 0.000 claims description 11
- 239000003595 mist Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000005574 cross-species transmission Effects 0.000 claims 1
- 239000003305 oil spill Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to a cleaning device applied to an on-load voltage regulation tap switch of a transformer, which comprises an operation box body and a cleaning assembly, wherein the cleaning assembly is arranged inside the operation box body, the operation box body is used for controlling the cleaning assembly to perform cleaning operation, the operation box body comprises a control module, an operation interface and a communication module, the cleaning assembly comprises an oil suction device, an oil injection device and a grinding device, and the oil suction device, the oil injection device and the grinding device are respectively connected with the control module. According to the cleaning device provided by the invention, the control module is used for controlling the opening and closing of the electromagnetic valve, so that the working time of cleaning an oil chamber and cleaning a switching core or selecting a switch in switch hoisting inspection is reduced, the cost of manpower and material resources is reduced, the cleaning and polishing quality is improved, and the working efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of transformer on-load voltage regulation tap-changers, and particularly relates to a cleaning device applied to a transformer on-load voltage regulation tap-changer.
Background
In the current power transmission and transformation industry, on-load tap changers are widely installed on large transformers, which play an important role in ensuring the voltage quality of systems and users, and currently, on-load tap changers are installed on most transformers with the capacity of 10MVA or more in developed countries, so that electric power systems and users in China increasingly adopt on-load tap changers, which are the most critical and expensive elements.
After reaching certain operational life or action number of times, transformer on-load tap-changer should carry out the hanging core maintenance work, and this work mainly includes multinomial work such as clean change over switch grease chamber and change over switch core, contact are polished, and traditional transformer on-load switch hangs and examines work and generally only adopts simple clean gimmick of cleaning, clears up grease chamber and switch core, can't reach deep level cleanness, and has clean dead angle, and its inferior aspect still includes following several:
1. due to the fact that the depth of the oil tank is large, dead angles which cannot be touched by personnel exist in the process of carrying out processes such as flushing, contact polishing and the like on the inside of the on-load switch oil tank;
2. the switch, the oil tank and the contact polishing process cannot be completely executed by only manually wiping;
3. the abrasion and cleaning and polishing conditions of the contact cannot be observed visually.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cleaning device applied to an on-load voltage regulation tap switch of a transformer, so that operators can avoid complicated operation processes, comprehensive cleaning is realized, and the working efficiency is improved.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a cleaning device applied to an on-load tap changer of a transformer comprises an operation box body and a cleaning component, wherein the cleaning component is arranged inside the operation box body, the operation box body is used for controlling the cleaning component to perform cleaning operation,
the cleaning assembly comprises an oil suction device and an oil injection device, the oil suction device comprises an oil suction pipe, a sump oil check valve, a sump oil shutoff valve, a sump oil discharge pump and a sump oil collecting container, one end of the oil suction pipe is connected with the sump oil discharge pump, the other end of the oil suction pipe is connected with a transformer on-load voltage regulation tapping switch oil chamber, the oil suction pipe is sequentially connected with the sump oil discharge pump, the sump oil shutoff valve and the sump oil check valve according to the direction of the sump oil discharge pump to the transformer on-load voltage regulation tapping switch oil chamber, the sump oil check valve is used for preventing the sump oil from flowing back to the transformer on-load voltage regulation tapping switch oil chamber, the sump oil shutoff valve is used for locking the residual sump oil in the oil suction pipe in a vacuum mode, the sump oil discharge pump is used for discharging the sump oil to the sump oil collecting container,
the oil injection device comprises an oil injection pipe, an oil injection shutoff valve, a first oil injection pump and an oil purification container, wherein one end of the oil injection pipe is connected with the oil purification container, the other end of the oil injection pipe is connected with an on-load voltage regulation tapping switch oil chamber of the transformer, the oil injection pipe is sequentially connected with the first oil injection pump and the oil injection shutoff valve according to the direction from the oil purification container to the on-load voltage regulation tapping switch oil chamber of the transformer, the first oil injection pump is used for injecting qualified insulating oil into the on-load voltage regulation tapping switch oil chamber of the transformer, and the oil injection shutoff valve is used for regulating oil flow and preventing the insulating oil from splashing or overflowing;
preferably, the oil injection device is connected with a polishing device, the polishing device comprises an oil purification pipe, a polishing and cleaning hand lever, an oil purification flow control valve, an oil purification pressurizing valve, an oil purification cut-off valve, a second oil injection pump and a flow divider, the input end and the output end of the flow divider are respectively connected with the oil injection pipe, the other output end of the flow divider is connected with one end of the oil purification pipe, the other end of the oil purification pipe is connected with the polishing and cleaning hand lever, the oil purification pipe is sequentially connected with the second oil injection pump, the oil purification cut-off valve, the oil purification pressurizing valve and the oil purification flow control valve in the direction of the polishing and cleaning hand lever according to the flow divider, the oil purification flow control valve is used for adjusting the flow of high-pressure oil, and the oil purification pressurizing valve is used for pressurizing to form high-pressure oil flow and transmitting the high-pressure oil flow to the polishing and cleaning hand lever;
preferably, a front-mounted spray head is arranged on the polishing and cleaning hand rod and used for spraying high-pressure oil mist to the on-load voltage-regulating tap switch of the transformer;
preferably, the polishing and cleaning hand lever adopts a high-speed electric polisher, and the high-speed electric polisher is used for polishing the switch;
preferably, the operation box body comprises a power supply module, a control module, a communication module, an operation panel and universal wheels, the control module is arranged inside the operation box body, the operation panel is arranged at the top end of the operation box body, the universal wheels are arranged at the bottom end of the operation box body, the power supply module is connected with the control module, and the control module is respectively connected with the operation panel, the communication module, the oil suction device, the polishing device and the oil injection device;
preferably, the front end of the polishing and cleaning hand lever is provided with a camera;
preferably, the joint of the oil suction pipe and the oil chamber of the transformer on-load tap changer is an explosion-proof high-pressure oil pipe;
preferably, the clean oil pipe is provided with a pressure gauge between the grinding and cleaning hand lever and the flow control valve.
The invention has the advantages and positive effects that:
the cleaning device applied to the on-load voltage regulation tap switch of the transformer adopts an oil absorption, oil injection and flushing integrated box body structure, is convenient for accommodating various external accessories, is additionally provided with a lockable universal wheel which is convenient to move, controls the opening and closing of a solenoid valve by using a control module, reduces the working time of cleaning an oil chamber and a cleaning switching core or a selection switch in switch hoisting inspection, reduces the cost of manpower and material resources, improves the cleaning and polishing quality, can visually observe the contact condition in the oil tank of the deep well in real time by linking a camera arranged at the top end of a polishing and cleaning hand lever with mobile equipment, solves the problems of incomplete maintenance and maintenance, invisible maintenance and polishing effect and incapability of filing and storing the maintenance effect, and improves the working efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a cleaning device applied to an on-load tap changer of a transformer;
FIG. 2 is a schematic structural view of the operation box body of the present invention;
fig. 3 is a circuit connection diagram of the control module of the present invention.
Wherein, 1, operating box body; 2. an oil suction pipe; 3. a dirty oil collection container; 4. a dirty oil discharge pump; 5. a dirty oil shut-off valve; 6. a dirty oil check valve; 7. an oil filling pipe; 8. oil filling and shutoff valves; 9. a first oiling pump; 10. an oil purifying container; 11. cleaning an oil pipe; 12. polishing and cleaning the hand lever; 13. a net oil flow control valve; 14. a clean oil pressurization valve; 15. a clean oil shutoff valve; 16. a second oiling pump; 17. an oil filling pipe; 18. and a pressure gauge.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a cleaning device applied to an on-load tap changer of a transformer, which comprises an operation box body 1 and a cleaning component, wherein the cleaning component is arranged inside the operation box body 1, the operation box body 1 is used for controlling the cleaning component to perform cleaning operation,
the cleaning assembly comprises an oil suction device and an oil injection device, the oil suction device comprises an oil suction pipe 2, a sump oil check valve 6, a sump oil shutoff valve 5, a sump oil discharge pump 4 and a sump oil collecting container 3, one end of the oil suction pipe 2 is connected with the sump oil discharge pump 3, the other end of the oil suction pipe is connected with a transformer on-load tap-changer oil chamber, the oil suction pipe 2 is sequentially connected with the sump oil discharge pump 5 to the transformer on-load tap-changer oil chamber in the direction of the sump oil discharge pump 5, the sump oil discharge pump 4, the sump oil shutoff valve 5 and the sump oil check valve 6, the sump oil check valve 6 is used for preventing the sump oil from flowing back to the transformer on-load tap-changer oil chamber, the sump oil shutoff valve 5 is used for locking the residual sump oil in the oil suction pipe 2 in a vacuum mode, the sump oil can be effectively prevented from being spilt, the sump oil discharge pump 4 is used for discharging the sump oil into the sump oil collecting container 3,
oiling device includes oiling pipe 7, oiling stop valve 8, first oiling pump 9 and absolute oil container 10, the one end of oiling pipe 7 is connected absolute oil container 10, transformer on-load tap-changer grease chamber is connected to the other end, oiling pipe 7 follows absolute oil container 10 has connected gradually to the direction that transformer on-load tap-changer grease chamber first oiling pump 9, oiling stop valve 8, first oiling pump 9 is used for washing work completion back, injects qualified insulating oil into the switch grease chamber, oiling stop valve 8 is used for adjusting the oil flow and prevents that insulating oil flow from spilling over fast or overflowing.
In this embodiment, the oil injection device is connected with a grinding device, the grinding device comprises a clean oil pipe 11, a grinding and cleaning hand lever 12, a clean oil flow control valve 13, a clean oil pressurizing valve 14, a clean oil shutoff valve 15, a second oil injection pump 16 and a flow divider 17, the input end and the output end of the flow divider 17 are respectively connected with the oil filling pipe 7, the other output end of the flow divider 17 is connected with one end of the clean oil pipe 11, the other end of the clean oil pipe 11 is connected with a polishing and cleaning hand lever 12, the clean oil pipe 11 is sequentially connected with a second oil injection pump 16, a clean oil cut-off valve 15, a clean oil pressurizing valve 14 and a clean oil flow control valve 13 in the direction of the polishing and cleaning hand lever 12 according to the flow divider 17, the net oil flow control valve 13 is used for adjusting the flow of high-pressure oil, so that oil injection and flushing are facilitated, and the net oil pressurizing valve 14 is used for pressurizing to form high-pressure oil flow and transmitting the high-pressure oil flow to the polishing and cleaning hand lever 12.
In this embodiment, the polishing and cleaning hand lever 12 is provided with a front-end nozzle, and the front-end nozzle is used for spraying high-pressure oil mist to dead corners such as a barrel wall, a contact crack, a tank bottom sheave crack and the like, so as to complete cleaning of a change-over switch and the barrel wall of the oil tank.
In this embodiment, polish and wash handle bar 12 and adopt high-speed electronic polisher, high-speed electronic polisher is used for polishing diverter switch arc contact, transition contact, oil tank inner wall static contact, promotes efficiency of polishing and the quality of polishing.
In this embodiment, the operation box body 1 includes power module, control module, communication module, operating panel and universal wheel, control module sets up the inside of operation box body 1, operating panel sets up the top of operation box body 1, the universal wheel sets up the bottom of operation box body 1, power module with control module connects, control module respectively with operating panel, communication module, oil suction device, grinding device and oiling device are connected, can realize through operating panel the control of oil suction device, grinding device and oiling device.
In this embodiment, polish and wash the 12 front ends of handspike and be equipped with the camera, when polishing the washing to the contact, control module can to polish effect and contact wearing and tearing data send to control module, control module with data operation, handle the back and with communication module sends to and establishes the real-time observation of being convenient for and shoots and keeps the shelves.
In this embodiment, the connection between the oil suction pipe 2 and the oil chamber of the on-load tap-changer of the transformer is an explosion-proof high-pressure oil pipe, which can extend into the bottom of the oil tank and is convenient to store.
During the use, shunt 17 will clean insulating oil in the oil-purifying container 10 divides into two the tunnel, wherein the warp of the same kind the shower nozzle on the washing hand lever 12 of polishing can be spouted high-pressure oil mist to dead angles such as the bucket wall, contact crack, bottom of the case sheave crack of transformer on-load tap-changer grease chamber, accomplishes the clearance of transformer on-load tap-changer grease chamber switch and oil tank bucket wall.
During the operation shower nozzle on the washing handle bar 12 of polishing can possess the shower nozzle of multiple configuration according to actual need, and the different environment of reply uses, and shower nozzle angle is adjustable simultaneously, and spray gun spun water column has umbrella-type and cylindricality mode, and umbrella-type water column is applicable to the clearance change over switch grease chamber inner wall, and the cylindricality water column then is applicable to the position that the washing dirt is serious, and rotatory shower nozzle sheath can transform the water column form, and the transform form needs to go on under the state of closing the rifle.
The polishing and cleaning handle rod 12 is influenced by requirements of length, load bearing, operability, convenient storage and cleanness, can be processed and nested by adopting a high-strength carbon fiber tube, and is attached to an oil tube on a handle rod, so that the requirements of different depths are met conveniently.
In this embodiment, the clean oil pipe 11 is provided with a pressure gauge 18 between the polishing and cleaning handle 12 and the flow control valve 13, and the pressure gauge 18 has an alarm function and can automatically protect the safety of the clean oil pipe 11 and the second oil injection pump 16.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific installation and working processes of the above-described apparatus may refer to the corresponding processes in the above-described embodiments, and are not described herein again.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (8)
1. The utility model provides a be applied to transformer on-load tap-changer's cleaning device which characterized in that: comprises an operation box body and a cleaning component, wherein the cleaning component is arranged inside the operation box body, the operation box body is used for controlling the cleaning component to execute cleaning operation,
the cleaning assembly comprises an oil suction device and an oil injection device, the oil suction device comprises an oil suction pipe, a sump oil check valve, a sump oil shutoff valve, a sump oil discharge pump and a sump oil collecting container, one end of the oil suction pipe is connected with the sump oil discharge pump, the other end of the oil suction pipe is connected with a transformer on-load voltage regulation tapping switch oil chamber, the oil suction pipe is sequentially connected with the sump oil discharge pump, the sump oil shutoff valve and the sump oil check valve according to the direction of the sump oil discharge pump to the transformer on-load voltage regulation tapping switch oil chamber, the sump oil check valve is used for preventing the sump oil from flowing back to the transformer on-load voltage regulation tapping switch oil chamber, the sump oil shutoff valve is used for locking the residual sump oil in the oil suction pipe in a vacuum mode, the sump oil discharge pump is used for discharging the sump oil to the sump oil collecting container,
the oiling device includes oiling pipe, oiling stop valve, first oiling pump and oil purification container, the one end of oiling pipe is connected oil purification container, the transformer on-load voltage regulation tapping switch grease chamber is connected to the other end, the oiling pipe follows the oil purification container has connected gradually to the direction that the transformer on-load voltage regulation tapping switch grease chamber first oiling pump, oiling stop valve, first oiling pump is used for injecting into qualified insulating oil and connects the transformer on-load voltage regulation tapping switch grease chamber, the oiling stop valve is used for regulating oil flow and prevents insulating oil spill or spill over.
2. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 1, characterized in that: the oiling device is connected with grinding device, grinding device includes clean oil pipe, polishes and washs hand lever, clean oil flow control valve, clean oil forcing valve, clean oil stop valve, second oiling pump and shunt, the input and the output of shunt respectively with the oiling union coupling, another output of shunt with clean oil pipe's one end is connected, clean oil pipe's the other end is connected and is polished and washs the hand lever, clean oil pipe according to the shunt to polish and wash hand lever direction and have connected gradually second oiling pump, clean oil stop valve, clean oil forcing valve and clean oil flow control valve, clean oil flow control valve is used for adjusting high-pressure oil flow, clean oil forcing valve is used for forming the high-pressure oil stream after the pressurization, and transmit extremely polish and wash the hand lever.
3. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 2, characterized in that: the polishing and cleaning hand rod is provided with a front-mounted spray head, and the front-mounted spray head is used for spraying high-pressure oil mist to the on-load voltage-regulating tap switch of the transformer.
4. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 3, characterized in that: the polishing and cleaning hand lever adopts a high-speed electric polisher which is used for polishing the switch.
5. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 1, characterized in that: the operation box body comprises a power supply module, a control module, a communication module, an operation panel and universal wheels, wherein the control module is arranged inside the operation box body, the operation panel is arranged at the top end of the operation box body, the universal wheels are arranged at the bottom end of the operation box body, the power supply module is connected with the control module, and the control module is respectively connected with the operation panel, the communication module, the oil suction device, the grinding device and the oil injection device.
6. The cleaning device applied to the on-load tap-changer of the transformer, according to claim 4, is characterized in that: the front end of the polishing and cleaning hand lever is provided with a camera.
7. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 1, characterized in that: and the joint of the oil suction pipe and the oil chamber of the on-load voltage regulation tap switch of the transformer is an explosion-proof high-pressure oil pipe.
8. The cleaning device applied to the on-load tap-changer of the transformer as claimed in claim 2, characterized in that: and a pressure gauge is arranged between the polishing and cleaning hand lever and the flow control valve of the clean oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111393994.4A CN113977434A (en) | 2021-11-23 | 2021-11-23 | Cleaning device applied to on-load voltage regulation tap switch of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111393994.4A CN113977434A (en) | 2021-11-23 | 2021-11-23 | Cleaning device applied to on-load voltage regulation tap switch of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113977434A true CN113977434A (en) | 2022-01-28 |
Family
ID=79750008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111393994.4A Pending CN113977434A (en) | 2021-11-23 | 2021-11-23 | Cleaning device applied to on-load voltage regulation tap switch of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113977434A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194647A (en) * | 2022-08-03 | 2022-10-18 | 国网天津市电力公司 | Visual washing and polishing cleaning rod for on-load voltage regulating switch |
-
2021
- 2021-11-23 CN CN202111393994.4A patent/CN113977434A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194647A (en) * | 2022-08-03 | 2022-10-18 | 国网天津市电力公司 | Visual washing and polishing cleaning rod for on-load voltage regulating switch |
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