CN110702341A - Transformer conservator sealing detection device - Google Patents
Transformer conservator sealing detection device Download PDFInfo
- Publication number
- CN110702341A CN110702341A CN201911140617.2A CN201911140617A CN110702341A CN 110702341 A CN110702341 A CN 110702341A CN 201911140617 A CN201911140617 A CN 201911140617A CN 110702341 A CN110702341 A CN 110702341A
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- air compressor
- shell
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- control module
- vacuum pump
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/34—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3209—Details, e.g. container closure devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell
- G01M3/329—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell for verifying the internal pressure of closed containers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to a device for detecting the sealing performance of a transformer conservator, which comprises a shell, wherein a control panel is arranged on the shell, an installation bin and an accessory placing bin are arranged in the shell, a vacuum pump, an air compressor and a pressure protection electromagnetic valve of the air compressor are arranged in the installation bin, the air compressor is communicated with a gas filter, and the air compressor and the vacuum pump are communicated with a gas storage tank in parallel; the vacuum pump and the air compressor are respectively communicated with an external pipeline interface through corresponding internal pipelines, a detection gas circuit interface is further arranged at the external pipeline interface, the detection gas circuit interface is communicated with a pressure gauge through a pipeline, the external pipeline interface is installed on the shell, and the external pipeline interface is communicated with a transformer conservator through a connecting pipe; still include external power supply and control module, control module control vacuum pump and air compressor machine, control panel is used for fixed mounting to show control module. The work safety, the accuracy and the work efficiency are improved.
Description
Technical Field
The invention relates to the technical field of detection of power systems and transformer conservators, in particular to a device for detecting the tightness of a transformer conservator.
Background
The safety production is the important factor in the first-line work of electric power, and the normal and stable operation of equipment in a transformer substation is the basis for ensuring the safety of a power grid. The transformer is used as the most main electrical equipment in the transformer substation and has the function of voltage conversion. The transformer can be ensured to operate safely and stably, and the transformer has great significance for normal operation of the transformer substation and safety of a power grid.
The transformer is used as main primary equipment in a transformer substation and comprises an iron core, a transformer winding coil, a tap switch, an oil conservator, a breather and other components, wherein the functions of the components are different, and if one component is damaged, the normal and stable operation of the transformer can be influenced.
The oil conservator is used as an oil storage device of the transformer, most of the oil conservators widely used in the current power system are in a capsule type, and when the volume of the transformer oil expands or contracts along with the change of the oil temperature, the oil conservator capsule plays a role in oil storage and oil supplement, and can ensure that an oil chamber is filled with oil. Meanwhile, the contact surface of the transformer oil and the air is reduced, and the moisture, dust and oxidized oil dirt absorbed from the air are deposited in a depositor at the bottom of the conservator, so that the degradation speed of the transformer oil is greatly reduced. In the actual operation process, the air leakage phenomenon can be caused due to the difference of the processes of all production units, the difference of material aging and the difference of the use temperature. The arrangement of power failure maintenance brings many troubles to the power grid maintenance.
At present, the company detects the air tightness of the transformer conservator, whether insulating oil exists in the air bag or not is checked, the air bag exhaust hole above the conservator is opened, the inner wall of the air bag is wiped by clean cleaning cloth, and whether the insulating oil exists on the cleaning cloth or not is seen to judge whether the air tightness of the transformer conservator capsule is good or not.
The air tightness detection of the transformer conservator has the following three problems:
1. the air tightness detection of the transformer conservator is free of a system detection device;
2. when the cleaning cloth is used for wiping detection, an operator needs to ascend and disassemble the air bag exhaust holes above the conservator, the use time is long, corresponding ascending risks exist, and the working efficiency and personal safety of the operator are affected;
3. whether the air tightness of the transformer conservator capsule is good or not is judged by combining the cleaning degree of the cleaning cloth and the conservator pressure value, and the accuracy of the conclusion is low.
Obviously, the existing detection mode cannot well meet the detection requirement, and the normal operation of the transformer is influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a device for detecting the tightness of a transformer conservator, which can realize the air tightness detection of a capsule under the condition that the conservator is not detached.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for detecting the sealing performance of a transformer conservator comprises a shell, wherein a control panel is arranged on the shell, an installation bin and an accessory placing bin are arranged in the shell, a vacuum pump, an air compressor and a pressure protection electromagnetic valve of the air compressor are arranged in the installation bin, the air compressor is communicated with a gas filter, and the air compressor and the vacuum pump are communicated with a gas storage tank in parallel; the vacuum pump and the air compressor are respectively communicated with an external pipeline interface through corresponding internal pipelines, a detection gas circuit interface is further arranged at the external pipeline interface, the detection gas circuit interface is communicated with a pressure gauge through a pipeline, the external pipeline interface is installed on the shell, and the external pipeline interface is communicated with a transformer conservator through a connecting pipe; still include external power supply and control module, control module control vacuum pump and air compressor machine, control panel is used for fixed mounting to show control module, it includes manometer, a plurality of button and pilot lamp to show control module.
Further, the control module is a relay combination control module.
Furthermore, a handle is installed on the upper portion of the shell, and a traveling wheel is installed on the lower portion of the shell.
Further, the accessory placing bin and the mounting bin are both provided with bin doors capable of being opened.
Furthermore, the transformer conservator connecting end and the external pipeline interface connecting end of the connecting pipe are both set to be self-sealing connecting interfaces.
Further, the pressure gauge is a digital pressure gauge. Can be accurate to three decimal places, and is more accurate.
Further, the shell is detachably connected with the grounding electrode.
Further, the filter is a glass fiber filter.
The invention has the beneficial effects that:
(1) the method has the advantages that two detection methods of applying a micro-positive pressure to the oil pillow capsule and maintaining the micro-positive pressure in the air bag are realized, one or two detection results can be optionally verified mutually, and the detection result is more accurate;
(2) the air vent of the conservator air bag does not need to be opened by climbing above the transformer or whether the insulating oil flows out of the air vent is observed, the requirement of ascending operation during the detection of the transformer conservator capsule is well avoided, and the operation safety is improved;
(3) the device displays the pressure value inside the transformer conservator capsule in real time in the detection process, has reliable accuracy and can provide data for the air tightness detection result of the transformer conservator capsule;
(4) the detection time is greatly shortened, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a housing of the detecting device;
FIG. 2 is a schematic view of the working principle of the detecting device;
FIG. 3 is a system block diagram of a control system for the detection device;
FIG. 4 is a schematic diagram of a relay control principle of the detection device;
in the figure, a shell 1, an accessory placing bin 11, an installation bin 12, a control panel 13, a pressure gauge 131, a handle 14, a walking wheel 15, an external pipeline connector 2, an oil conservator connecting end 3, an air storage tank 4, an air compressor 5, a vacuum pump 6, a filter 7, a connecting pipe 8 and an oil conservator 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example one
Fig. 1 to 4 show a tightness detection device for a transformer conservator 9, which comprises a housing 1, wherein a control panel 13 is arranged on the housing 1, an installation bin 12 and an accessory placing bin 11 are arranged inside the housing 1, a vacuum pump 6, an air compressor 5 and a pressure protection electromagnetic valve thereof are arranged in the installation bin 12, the air compressor 5 is communicated with a gas filter 7, and the air compressor 5 and the vacuum pump 6 are arranged in parallel and communicated with a gas storage tank 4; the vacuum pump 6 and the air compressor 5 are respectively communicated with the external pipeline interface 2 through corresponding internal pipelines, a detection gas circuit interface is also arranged at the external pipeline interface 2 and is communicated with the pressure gauge 131 through a pipeline, the external pipeline interface 2 is installed on the shell 1, and the external pipeline interface 2 is communicated with the transformer conservator 9 through a connecting pipe 8; the system also comprises an external power supply and a control module, wherein the control module controls the vacuum pump 6 and the air compressor, and the schematic control principle of the system is shown in figure 3; the control panel 13 is used for fixedly mounting a display control module, and the display control module comprises a pressure gauge 131, a plurality of keys and an indicator light.
A handle is arranged at the upper part of the shell 1, and walking wheels are arranged at the lower part of the shell; the handle is used for fixing in the carrying process and is convenient for manual carrying; the walking wheel is a universal wheel capable of braking, so that the walking wheel is convenient to move, and the carrying and moving are more labor-saving.
The accessory placing bin 11 and the mounting bin 12 are both provided with openable bin doors. The bin doors are provided with door locks.
And the connecting end 3 of the transformer conservator 9 of the connecting pipe 8 and the connecting end of the external pipeline interface 2 are both set to be self-sealing connecting interfaces. Wherein the external pipeline interface 2 is a telescopic clamping lock type interface.
The pressure gauge 131 is a digital pressure gauge 131. Can be accurate to three decimal places, and is more accurate.
The shell 1 is detachably connected with a grounding electrode; the safety is improved.
The filter 7 is a glass fiber filter 7; in the process of inflation, if air with high humidity is filled into the transformer conservator 9 capsule, the transformer conservator 9 capsule is affected with damp, the inner wall of the capsule can be corroded for a long time, and the air tightness of the capsule is affected. In order to ensure the dryness of the gas filled in the transformer conservator 9 capsule, it is necessary to install a gas filter 7 in the device. The inner core of the glass fiber filter 7 is a glass fiber cylinder, so that the replacement is convenient. The connecting pipe 8 and the built-in pipeline are made of insulating rubber.
The invention has the following obvious beneficial effects: the micro-positive pressure is applied to the oil conservator 9 capsule and the micro-positive pressure is maintained in the air sac, and one or two detection results can be optionally verified mutually, so that the detection result is more accurate; the air bag vent of the oil conservator 9 does not need to be climbed to the upper part of the transformer to open or observe whether insulating oil flows out of the vent, the requirement of ascending operation during capsule detection of the transformer oil conservator 9 is well avoided, and the operation safety is improved; the pressure value in the capsule of the transformer conservator 9 is displayed in real time in the detection process of the device, the accuracy is reliable, and data can be provided for the air tightness detection result of the capsule of the transformer conservator 9; the detection time is greatly shortened, and the working efficiency is improved.
Example two
The embodiments are not described in detail.
In this embodiment, the control module is a relay combination control module. The relay combination control module comprises a time relay, an intermediate relay and a contactor, and a combination control schematic circuit diagram of the relay combination control module is shown in fig. 4. When the time relay detects the air tightness of a transformer, in order to realize the automatic starting and stopping functions of the device within a certain time, on the basis of large same delay range, the electrodynamic time relay is selected in consideration of higher accuracy and no time difference delay. The intermediate relay may be connected to a control panel 13 of the device to operate the device by controlling one or more line switches on the coincidence current with its normally open or normally closed contacts. The contactor can realize the function of controlling a large current load by using a small current, can be self-locked and interlocked, prevents accidents caused by misoperation, and can be used for controlling the air compressor 5 and the vacuum pump 6 in the device.
In this embodiment, the pressure protection solenoid valve may include an inflation solenoid valve and a pressure detection solenoid valve; respectively used for controlling the vacuum pump 6 and the air compressor 5 in the detection process and processing pressure signals and improving the accuracy of the device. Respectively connected to corresponding relay contacts. In order to ensure the normal operation of the installed gas solenoid valve, the gas solenoid valve is fixed on the device shell, and the situations of falling and damage are prevented. The vacuum pump 6 and the air compressor 5 are respectively connected to the inflation solenoid valve so as to be controlled, and the air storage tank 4 is arranged between the vacuum pump 6 and the air compressor 5 so as to be convenient for storing gas during inflation detection and vacuum pumping detection.
In conclusion, the invention has the following obvious advantages: the control is simple, two detection methods of applying a micro-positive pressure to the oil conservator 9 capsule and maintaining a micro-positive pressure in the air sac are realized, one or both of the detection results can be selected to be mutually verified, and the detection result is more accurate; the air bag vent of the oil conservator 9 does not need to be climbed to the upper part of the transformer to open or observe whether insulating oil flows out of the vent, the requirement of ascending operation during capsule detection of the transformer oil conservator 9 is well avoided, and the operation safety is improved; the pressure value in the capsule of the transformer conservator 9 is displayed in real time in the detection process of the device, the accuracy is reliable, and data can be provided for the air tightness detection result of the capsule of the transformer conservator 9; the detection time is greatly shortened, and the working efficiency is improved.
EXAMPLE III
In this embodiment, no description is made of one or two of the above embodiments.
The working mode and the specific operation method of the device for detecting the tightness of the transformer conservator 9 in the embodiment are as follows:
the preparation work is as follows:
1. the power socket 220V is prepared and the equipment is placed close to the transformer breather and the casters are secured.
2. Connecting pipe 8: closing a valve of the transformer breather, detaching the transformer breather, connecting one end of a connecting pipe 8 with the connecting end 3 of the conservator 9, and quickly inserting the other end of the connecting pipe to connect with the external pipeline interface 2;
3. connecting a power supply: the device power supply (three-hole plug) is connected.
The method comprises the following steps of (I) inflation detection:
1. and turning on a power supply switch, turning on an indicator lamp, turning on an emergency stop knob, displaying by a pressure gauge 131, and turning on a breather valve of the transformer.
2. Pressing the start/stop button of the air compressor, starting the air compressor (the pressure of the air compressor reaches 0.7MPa, automatic stop and repeated start)
3. And pressing an inflation start/stop button, starting the equipment to detect the pressure of the oil conservator 9, automatically closing the detection electromagnetic valve after 30S, opening the inflation electromagnetic valve after 5S, automatically closing the inflation electromagnetic valve after 30S inflation, and automatically opening the detection electromagnetic valve after 10S inflation to detect the pressure of the oil conservator 9. When the pressure is less than 20KPa, the above operation is automatically repeated, and when the pressure is more than or equal to 20KPa, the inflation procedure is stopped. At this time, the air compressor start/stop button and the inflation start/stop button need to be closed, and the detection electromagnetic valve is always opened as long as the pressure is always greater than or equal to 20 KPa. If the air leakage phenomenon exists, the pressure is less than 20KPa, the detection electromagnetic valve can be automatically closed, at the moment, the inflation start/stop button can be manually pressed, the detection electromagnetic valve can be opened, but the detection electromagnetic valve must be closed within 30S (the working time of the detection electromagnetic valve), otherwise, the equipment can be automatically inflated again;
4. and detecting the time of the oil conservator 9 and recording the time of the pressure, and executing according to the detection requirement standard of the oil conservator 9.
The shutdown operation is as follows:
(1) firstly, the air storage tank 4 of the air compressor is decompressed, a side door of the device can be opened, a pipe body is provided with a decompression opening, and the decompression can be carried out directly by using a drain valve; the method comprises the following specific steps:
method ① comprises closing the valve of the respirator, removing the quick connector, removing the flange, opening the valve of the respirator, relieving pressure of the conservator 9, relieving pressure of the pipeline, releasing pressure of the quick connector in the pipeline, releasing pressure in the equipment, and releasing pressure of the female connector in the equipment.
(2) Closing a valve of the respirator, installing the respirator, opening the valve, pressing an equipment emergency stop button, closing a power supply, collecting a pipeline, and putting the pipeline into the accessory placing bin 11.
The remarks are as follows:
(1) in the process of inflating the equipment, the air compressor is not required to be turned off;
(2) the maximum measuring range of the pressure gauge 131 is 100KPa, the pressure gauge can still normally work under the condition of overload of 120 percent without influencing the accuracy, and the pressure gauge can bear 200 percent of overload without damaging a sensor;
(3) the air inflation time of the equipment can be adjusted according to the size of the oil conservator 9;
(4) the water removal filter element needs to be replaced once a year even if equipment is not used; the time of high humidity requires examination before use;
(5) the equipment is not used for a long time, and the sealing performance of the internal pipeline is detected before the equipment is used;
(6) after the equipment is used up, the pressure is released, and the pressure gauge 131 is ensured to display-000.
(II) vacuumizing and detecting:
1. and turning on a power supply switch, turning on an indicator lamp, turning on an emergency stop knob, displaying by a pressure gauge 131, and turning on a breather valve of the transformer.
2. Pressing a vacuumizing button, starting a vacuum pump 6, continuously vacuumizing for 10min (adjustable for 0-30 min) after the pressure of the vacuum pump 6 reaches-0.098 MPa (2000Pa), and stopping;
3. the vacuum pump 6 can also be manually stopped, and the stop button of the vacuum pump 6 can be pressed;
4. observing a digital display meter, and stabilizing the pressure at more than-0.098 MPa in constant time, namely the sealing of the oil conservator 9 is good; if the pressure gauge 131 is changed obviously or the vacuumizing pressure is less than-0.098 MPa, the sealing of the oil conservator 9 is poor.
The shutdown operation is as follows:
(1) and (3) decompressing the pipeline and the oil conservator 9: closing a breather valve, detaching the pipeline quick connector, detaching the matched flange, and opening the breather valve;
releasing pressure of the pipeline, namely releasing pressure of equipment and the pipeline by using a three-way quick connector;
(2) closing a valve of the respirator, installing the respirator, opening the valve, pressing an equipment emergency stop button, closing a power supply, collecting a pipeline, and putting the pipeline into the accessory placing bin 11.
In conclusion, the invention has the following obvious advantages: the micro-positive pressure is applied to the oil conservator 9 capsule and the micro-positive pressure is maintained in the air sac, and one or two detection results can be optionally verified mutually, so that the detection result is more accurate; the air bag vent of the oil conservator 9 does not need to be climbed to the upper part of the transformer to open or observe whether insulating oil flows out of the vent, the requirement of ascending operation during capsule detection of the transformer oil conservator 9 is well avoided, and the operation safety is improved; the pressure value in the capsule of the transformer conservator 9 is displayed in real time in the detection process of the device, the accuracy is reliable, and data can be provided for the air tightness detection result of the capsule of the transformer conservator 9; the detection time is greatly shortened, and the working efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (6)
1. The device for detecting the sealing performance of the transformer conservator is characterized by comprising a shell, wherein a control panel is arranged on the shell, an installation bin and an accessory placing bin are arranged in the shell, a vacuum pump, an air compressor and a pressure protection electromagnetic valve of the air compressor are arranged in the installation bin, the air compressor is communicated with a gas filter, and the air compressor and the vacuum pump are communicated with a gas storage tank in parallel; the vacuum pump and the air compressor are respectively communicated with an external pipeline interface through corresponding internal pipelines, a detection gas circuit interface is further arranged at the external pipeline interface, the detection gas circuit interface is communicated with a pressure gauge through a pipeline, the external pipeline interface is installed on the shell, and the external pipeline interface is communicated with a transformer conservator through a connecting pipe; still include external power supply and control module, control module control vacuum pump and air compressor machine, control panel is used for fixed mounting to show control module, it includes manometer, a plurality of button and pilot lamp to show control module.
2. The detection device of claim 1, wherein the control module is a relay combination control module.
3. The inspection device of claim 1, wherein the accessory placement compartment and the installation compartment are each provided with an openable compartment door.
4. The detection device according to claim 1, wherein the transformer conservator connection end and the external pipeline interface connection end of the connection pipe are both provided with self-sealing connection interfaces.
5. The detecting device for detecting the rotation of the motor rotor as claimed in claim 1, wherein a handle is installed at the upper part of the shell, and a walking wheel is installed at the lower part of the shell; the shell is detachably connected with the grounding electrode.
6. The test device of claim 1, wherein the pressure gauge is a digital pressure gauge; the filter is a glass fiber filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140617.2A CN110702341A (en) | 2019-11-20 | 2019-11-20 | Transformer conservator sealing detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140617.2A CN110702341A (en) | 2019-11-20 | 2019-11-20 | Transformer conservator sealing detection device |
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| CN110702341A true CN110702341A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911140617.2A Pending CN110702341A (en) | 2019-11-20 | 2019-11-20 | Transformer conservator sealing detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358562A (en) * | 2021-04-25 | 2021-09-07 | 国网浙江省电力有限公司东阳市供电公司 | Device for detecting damage of air bag of main transformer oil conservator |
-
2019
- 2019-11-20 CN CN201911140617.2A patent/CN110702341A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358562A (en) * | 2021-04-25 | 2021-09-07 | 国网浙江省电力有限公司东阳市供电公司 | Device for detecting damage of air bag of main transformer oil conservator |
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