CN216013368U - Pressure balance system of online monitoring device for dissolved gas in transformer oil - Google Patents
Pressure balance system of online monitoring device for dissolved gas in transformer oil Download PDFInfo
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- CN216013368U CN216013368U CN202122033718.9U CN202122033718U CN216013368U CN 216013368 U CN216013368 U CN 216013368U CN 202122033718 U CN202122033718 U CN 202122033718U CN 216013368 U CN216013368 U CN 216013368U
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- online monitoring
- oil tank
- pressure
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Abstract
The utility model belongs to the technical field of power equipment state monitoring and fault diagnosis, and particularly relates to a pressure balance system of an online monitoring device for dissolved gas in transformer oil. The system comprises a piston type oil tank, an online monitoring device, a pressure gas output source and a logic control module; the online monitoring device is connected with the piston type oil tank, the online monitoring device is electrically connected with the logic control module, the pressure gas output source is connected with the piston type oil tank, the logic control module controls the normal operation of the device system, and the logic control module is electrically connected with the man-machine exchange module. The utility model provides a gaseous on-line monitoring device's of dissolved in transformer oil pressure balance system its in the oil tank accurate oil appearance can flow in and discharge automatically when using to realize the cyclic process of many times test, improved the degree of automation of testing process, also alleviateed debugging personnel's detection pressure.
Description
Technical Field
The utility model belongs to the technical field of power equipment state monitoring and fault diagnosis, and particularly relates to a pressure balance system of an online monitoring device for dissolved gas in transformer oil.
Background
In the process of checking the online monitoring device for the dissolved gas in the transformer oil, a standard oil sample with known concentration which is prepared in advance in the piston type oil tank needs to enter the online monitoring device for detection, and after the online monitoring device completes detection, the measured data of the online monitoring device is compared with the known concentration of the standard oil sample, so that whether the indexes of the online monitoring device, such as measurement error, repeatability and the like, meet the requirements or not is obtained.
The piston type oil tank for checking the existing online monitoring device mainly comprises an oil storage cavity and an inflation cavity, when the online monitoring device needs oil inlet, gas (compressed air or nitrogen and the like) needs to be injected into the inflation cavity to apply pressure to push a piston to move downwards, so that a standard oil sample in the oil storage cavity enters the online monitoring device through an oil tank oil outlet; after the on-line monitoring device finishes detection, the oil sample entering the device is discharged from the oil outlet of the device and circularly sent to the oil return port of the oil storage cavity to return to the inside of the oil tank to finish circulation.
However, different manufacturers of the online monitoring device for the dissolved gas in the transformer oil have different pressures required for oil inlet and oil discharge, abnormal oil inlet caused by insufficient pressure of an inflation cavity of a piston type oil tank when the online monitoring device is used for oil inlet frequently occurs in the testing process, or the pressure of the inflation cavity of the oil tank is too high in the oil discharge process, so that the online monitoring device cannot return oil due to over-pressure alarm, and the device stops detecting.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pressure balance system of an online monitoring device for dissolved gas in transformer oil, which aims to solve the problem that the conventional online monitoring device frequently has oil inlet or oil return faults.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a pressure balance system of an online monitoring device for dissolved gas in transformer oil comprises a piston type oil tank, an online monitoring device, a pressure gas output source and a logic control module; the online monitoring device is connected with the piston type oil tank, the online monitoring device is electrically connected with the logic control module, the pressure gas output source is connected with the piston type oil tank, the logic control module controls the normal operation of the device system, and the logic control module is electrically connected with the man-machine exchange module.
Further, the piston type oil tank comprises an oil storage cavity, a piston and an air storage cavity, and the piston divides the piston type oil tank into two parts;
further, the pressure gas output source is connected with the gas storage cavity and used for providing power for the system;
further, an oil return valve is arranged at the bottom of the oil storage cavity and is communicated with the online monitoring device 10.
Furthermore, one side of the air storage cavity is provided with an air guide pipe, a pressure sensor is arranged in the air guide pipe, one side of the air guide pipe is provided with a three-way pipe, one side of the three-way pipe is communicated with the air guide pipe, and the other two sides of the three-way pipe are respectively provided with a pressurizing electromagnetic valve and a pressure relief electromagnetic valve.
Further, the pressurizing electromagnetic valve is connected with a pressure gas output source.
Furthermore, the pressurizing electromagnetic valve and the pressure relief electromagnetic valve are electrically connected with the logic control module.
Furthermore, an oil tank piston rod is arranged at the upper end of the piston, the oil tank piston rod is of a hollow structure, an oil tank oil discharge port is arranged in the oil tank piston rod, and the oil tank oil discharge port is connected with an online monitoring device.
Furthermore, a piston rod displacement sensor is arranged on one side of the oil tank oil outlet, and the piston rod displacement sensor is electrically connected with the logic control module.
To sum up, owing to adopted above-mentioned technical scheme, utility model's beneficial technological effect is:
the pressure balance system of the online monitoring device for the dissolved gas in the transformer oil realizes the automatic inflow and discharge of a standard oil sample in an oil tank in the process of a calibration device, realizes the cyclic process of multiple tests, improves the automation degree of the detection process, and also lightens the detection pressure of debugging personnel.
Drawings
Fig. 1 is a schematic structural diagram of a pressure balance system of an online monitoring device for dissolved gas in transformer oil.
In the figure: the system comprises a piston type oil tank 1, an oil return valve 2, an oil storage cavity 3, a piston 4, an air storage cavity 5, an oil tank piston rod 6, an oil tank oil discharge port 7, a piston rod displacement sensor 8, a pressurization electromagnetic valve 9, an online monitoring device 10, a pressure gas output source 11, a logic control module 12, a man-machine interaction module 13, a pressure relief electromagnetic valve 14, a pressure sensor 15, a three-way pipe 16 and an air guide pipe 17.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
In this embodiment, a pressure balance system of an online monitoring device for dissolved gas in transformer oil comprises a piston-type oil tank 1, an online monitoring device 10, a pressure gas output source 11, and a logic control module 12; the online monitoring device 10 is connected with the piston type oil tank 1; the pressure gas output source 11 is connected with the piston type oil tank 1, the online monitoring device 10 is electrically connected with the logic control module 12, the logic control module 12 controls the normal operation of the system, and the logic control module 12 is electrically connected with the man-machine exchange module 13; the piston type oil tank 1 comprises an oil storage cavity 3, a piston 4 and an air storage cavity 5, wherein the piston 4 divides the piston type oil tank 1 into two parts; the pressure gas output source 11 is connected with the gas storage cavity 5, and the pressure gas output source 11 is used for providing power for the system; an oil return valve 2 is arranged at the bottom of the oil storage cavity 3, and the oil return valve 2 is communicated with an online monitoring device 10; one side of the gas storage cavity 5 is provided with a gas guide pipe 17, a pressure sensor 15 is arranged inside the gas guide pipe 17, one side of the gas guide pipe 17 is provided with a three-way pipe 16, one side of the three-way pipe 16 is communicated with the gas guide pipe 17, and the other two sides of the three-way pipe 16 are respectively provided with a pressurizing electromagnetic valve 9 and a pressure relief electromagnetic valve 14; the pressurizing electromagnetic valve 9 is connected with a pressure gas output source 11; the pressurizing electromagnetic valve 9 and the pressure relief electromagnetic valve 14 are electrically connected with the logic control module 12.
Example 2
In the embodiment, an oil tank piston rod 6 is arranged at the upper end of the piston 4, the oil tank piston rod 6 is of a hollow structure, an oil tank oil discharge port 7 is arranged in the oil tank piston rod 6, and the oil tank oil discharge port 7 is connected with an online monitoring device 10; and a piston rod displacement sensor 8 is arranged on one side of the oil tank oil outlet 7, and the piston rod displacement sensor 8 is electrically connected with the logic control module 12.
As shown in fig. 1, in a pressure balancing system of an online monitoring device for dissolved gas in transformer oil, before calibration is started, a tester inputs oil inlet pressure and oil return pressure required by the online monitoring device for dissolved gas in transformer oil to be tested, which are obtained in advance from a manufacturer of the online monitoring device, into a logic control module 12 through a human-computer interaction module 13, and simultaneously, the oil inlet time duration and the oil return time duration of the device to be tested can also be input into the logic control module 12 through the human-computer interaction module 13.
In the initial detection stage, when the on-line monitoring device 10 starts to feed oil for the first time, the on-line monitoring device is started through an initial start key of the logic control module 12, at this time, the pressure control gas output source 11 starts to output compressed gas with a set oil feeding pressure, the pressurization solenoid valve 9 is opened, the pressure relief solenoid valve 14 is in a closed state at this time, the compressed gas enters the gas storage cavity 5 of the piston type oil tank to push the piston to move downwards, a standard oil sample enters the on-line monitoring device 10 to start detection, when the pressure sensor 15 senses that the air pressure in the gas storage cavity 5 reaches a preset pressure value, a signal is fed back to the logic control module 12, and the logic control module 12 closes the pressurization solenoid valve 9 and controls the pressure gas output source 11 to stop outputting.
When the on-line monitoring device 10 starts to discharge the detected transformer oil back to the oil storage cavity 3, the starting conditions of the oil discharge program are as follows: 1. a piston rod displacement sensor 8 positioned at an oil outlet 8 of the piston type oil tank senses the upward displacement of the piston; 2. the online monitoring device 10 directly outputs an oil discharge signal to the logic control module 12; 3. after the oil inlet process is started, after the preset oil inlet time duration, the three conditions are in the relation of OR, and the oil discharge program is started immediately after one of the three conditions is met. When the oil discharge program is started, the pressure relief solenoid valve 14 is opened by the logic control module 12, at this time, the pressurization solenoid valve 9 is in a closed state, the pressure gas inside the gas storage cavity 5 of the piston type oil tank is released into the atmospheric environment until the pressure sensor senses that the pressure inside the gas storage cavity 5 reaches a preset oil discharge pressure value, a signal is fed back to the logic control module 12, the pressure relief solenoid valve 14 is closed by the logic control module 12, and at this time, the online monitoring device 10 can smoothly discharge the detected standard oil sample and return the standard oil sample to the piston type oil tank. The following three conditions satisfy an or gate relationship, namely, one of the three conditions is satisfied: 1. a displacement sensor 8 positioned at an oil outlet 7 of the piston type oil tank senses the downward displacement of the piston; 2. the on-line monitoring device 10 outputs an oil inlet signal to the logic control module 12; 3. after the oil discharging program is started, the next oil inlet program is automatically started after the preset oil return time.
Through the above process, the pressure balance system of the online monitoring device for the dissolved gas in the transformer oil can realize the automatic inflow and discharge of the standard oil sample in the oil tank in the process of the calibration device, and realize the cyclic process of multiple tests, thereby improving the automation degree of the detection process and reducing the detection pressure of debugging personnel.
The above description is not intended to limit the present invention, but rather, the present invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
Claims (9)
1. The utility model provides a gaseous on-line monitoring device's pressure balance system dissolves in transformer oil which characterized in that: the device comprises a piston type oil tank (1), an online monitoring device (10), a pressure gas output source (11) and a logic control module (12); the online monitoring device (10) is connected with the piston type oil tank (1); the online monitoring device (10) is electrically connected with a logic control module (12), the pressure gas output source (11) is connected with the piston type oil tank (1), the logic control module (12) controls the normal operation of the system, and the logic control module (12) is electrically connected with a man-machine exchange module (13).
2. The pressure balance system of the online monitoring device for the dissolved gas in the transformer oil according to claim 1, characterized in that: the piston type oil tank (1) comprises an oil storage cavity (3), a piston (4) and an air storage cavity (5), wherein the piston (4) divides the piston type oil tank (1) into two parts.
3. The pressure balance system of the online monitoring device for the dissolved gas in the transformer oil according to claim 1, characterized in that: the pressure gas output source (11) is connected with the gas storage cavity (5), and the pressure gas output source (11) is used for providing power for the system.
4. The pressure balance system of the online monitoring device for the dissolved gas in the transformer oil according to claim 2, characterized in that: the bottom of the oil storage cavity (3) is provided with an oil return valve (2), and the oil return valve (2) is communicated with an online monitoring device (10).
5. The pressure balance system of the online monitoring device for the dissolved gas in the transformer oil according to claim 2, characterized in that: one side of the air storage cavity (5) is provided with an air guide pipe (17), a pressure sensor (15) is arranged inside the air guide pipe (17), one side of the air guide pipe (17) is provided with a three-way pipe (16), one side of the three-way pipe (16) is communicated with the air guide pipe (17), and the other two sides of the three-way pipe (16) are respectively provided with a pressurizing electromagnetic valve (9) and a pressure relief electromagnetic valve (14).
6. The pressure balance system of the on-line monitoring device for the dissolved gas in the transformer oil according to claim 5, wherein: the pressurizing electromagnetic valve (9) is connected with a pressure gas output source (11).
7. The pressure balance system of the on-line monitoring device for the dissolved gas in the transformer oil according to claim 5, wherein: the pressurizing electromagnetic valve (9) and the pressure relief electromagnetic valve (14) are electrically connected with the logic control module (12).
8. The pressure balance system of the online monitoring device for the dissolved gas in the transformer oil according to claim 2, characterized in that: an oil tank piston rod (6) is arranged at the upper end of the piston (4), the oil tank piston rod (6) is of a hollow structure, an oil tank oil discharge port (7) is arranged in the oil tank piston rod (6), and the oil tank oil discharge port (7) is connected with an online monitoring device (10).
9. The pressure balance system of the on-line monitoring device for the dissolved gas in the transformer oil according to claim 8, characterized in that: and a piston rod displacement sensor (8) is arranged on one side of the oil tank oil outlet (7), and the piston rod displacement sensor (8) is electrically connected with the logic control module (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122033718.9U CN216013368U (en) | 2021-08-26 | 2021-08-26 | Pressure balance system of online monitoring device for dissolved gas in transformer oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122033718.9U CN216013368U (en) | 2021-08-26 | 2021-08-26 | Pressure balance system of online monitoring device for dissolved gas in transformer oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216013368U true CN216013368U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122033718.9U Expired - Fee Related CN216013368U (en) | 2021-08-26 | 2021-08-26 | Pressure balance system of online monitoring device for dissolved gas in transformer oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216013368U (en) |
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2021
- 2021-08-26 CN CN202122033718.9U patent/CN216013368U/en not_active Expired - Fee Related
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