CN202853695U - Power transformer oil level monitoring and warning device - Google Patents
Power transformer oil level monitoring and warning device Download PDFInfo
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- CN202853695U CN202853695U CN 201220527961 CN201220527961U CN202853695U CN 202853695 U CN202853695 U CN 202853695U CN 201220527961 CN201220527961 CN 201220527961 CN 201220527961 U CN201220527961 U CN 201220527961U CN 202853695 U CN202853695 U CN 202853695U
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- oil
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Abstract
Provided is a power transformer oil level monitoring and warning device. The power transformer oil level monitoring and warning device comprises a magnetic turning board liquid level meter arranged on a transformer. The magnetic turning board liquid level meter comprises a liquid level meter body and a magnetically controlled switch. The magnetically controlled switch of the magnetic turning board liquid level meter is connected with a liquid level monitoring and warning system through a liquid level transmitting device. The power transformer oil level monitoring and warning device can achieve remote monitoring and warning of transformer oil levels, and improves intelligentization levels of a power grid.
Description
Technical field
The utility model belongs to the transformer technology field, relates to a kind of security monitoring warning device of power transformer oil level height.
Background technology
At present, common transformer all is provided with conservator, at an end of conservator oil level indicator is housed, have on it expression oil temperature for-30 ℃ ,+20 ℃ and+three oil level lines (or temperature index line) of 40 ℃, in order to monitor the height of oil level under the different oil temperatures.Can judge whether that according to these three oil level lines needs refuel or drain the oil.If when temperature is+20 ℃, pasta is higher than+20 ℃ of these oil level lines, and then how the oil in the indication transformer should notify the maintainer to drain the oil, and oil level is reduced on this oil level line; Under same oil temperature, if pasta is lower than+20 ℃ of these oil level lines, then the oil in the indication transformer has lacked, and should notify the maintainer to refuel.If a large amount of leakage of oils reduce rapidly oil level, be low to moderate below the Buchholz relay or continuation decline, this transformer of then should stopping using immediately.A kind of transformer is arranged in addition, because considering to save cost, adopted the cancellation conservator, adopt the version of oil scale and pipe type oil-level gauge, it can indirect observation pasta height on the oil tank of transformer top.Pipe type oil-level gauge mainly is applicable to the oil-immersed full-sealed transformer, is installed in fuel tank cap of transformer top, shows the oil level in the fuel tank.Be that oil level is normal when occurring blue the sign in the form on oil level indicator top, oil level is more than case lid; Be that oil ga(u)ge is unusual when red the sign occurring, oil level needs suitable repairing below case lid.Above-mentioned oil level gauge for transformer all can not be realized remote monitoring and oil level abnormal alarm, is not suitable for the needs of present intelligent power network.
The utility model content
The purpose of this utility model is in order to solve above-mentioned the deficiencies in the prior art, to provide a kind of power transformer oil level to monitor warning device, can realizing to the oil level supervision of transformer with to unusual warning, to adapt to the needs of intelligent power network.
The technical scheme that the technical matters that the utility model solves adopts is:
A kind of power transformer oil level monitors warning device, comprise the magnetic flap level gauge that is located on the transformer, the magnetic flap level gauge comprises liquid level gauge and magnetic switch, it is characterized in that the magnetic switch of magnetic flap level gauge is connected with the liquid level monitoring warning system by level transmitting device.The indicator of magnetic flap level gauge is comprised of the magnetic color chips, color chips upset when the magnetic ball float in the body tube rises with liquid level, can show liquid level, installed magnetic switch additional in body tube, magnetic switch is transformed into digital signal to analog signals by level transmitting device, and the realization pit alert system is monitored the liquid level of transformer oil or reported to the police.
During implementation, level transmitting device comprises pressure unit and V/I transducer, and pressure unit is connected with the V/I transducer, and the V/I transducer is connected with the liquid level monitoring warning system.Pressure unit is transformed into analog signals transformer oil pressure parameter the electric signal of standard, and the V/I transducer is a kind of circuit that can use voltage signal controlling output current.
During implementation, magnetic switch outputs to level transmitting device by the pressure bridge circuit.Magnetic switch is equivalent to sensor, by pressure bridge output electrical signals.
During implementation, the liquid level monitoring warning system comprises alarm and liquid level control display instrument.
The magnetic flap level gauge have hold ball float cavity we be called main body tube or shell, it is by flange or other interfaces and oil tank of transformer or linker of conservator composition; Liquid level in its cavity is equal height with liquid level in the container like this, so the interior ball float of cavity can the lifting along with the lifting of liquid level in the container; At this time we can not see liquid level, filled a turned column display in the outside of cavity, when making ball float, sink to liquid at ball float and with emersion intersection partly magnet steel has been installed, it and ball float are during with liquid surface lifting, its magnetic sees through shell and passes to the turned column display, promotes 180 ° of magnetic column upsets; Because magnetic column is the right cylinder that has red, white two semicolumns synthetic, so the meeting change color (the following redness of liquid level, above white) towards the turned column display outside after 180 ° of overturning, the dichromatism intersection namely is the height of liquid level.Simultaneously increase magnetic switch on the basis of magnetic flap level gauge, the magnetic switch signal for Long-distance Control, has increased pressure unit for liquid level being controlled or being reported to the police in the monitoring liquid level.
The utility model power transformer oil level monitors warning device because the oil level indicator of transformer, when oil level undesired (on the low side or high oil level), can realize far controlling the automatic oil level monitoring alarm, and with backstage demonstration and chimes of doom prompting operator on duty, reach and patrol and examine robotization, guarantee to monitor accurately many transformers in different operations, oil level monitoring under the inspecting state, further promoted the intelligentized monitoring technique of power equipment.The utility model can be realized monitoring and the oil level of many power transformers of reporting to the police.
The beneficial effects of the utility model are: the utility model can be realized telemonitoring and the warning of transformer oil level, has improved the intelligent level of electrical network.
Description of drawings
Below in conjunction with drawings and Examples utility model is further specified.
Fig. 1 is the principle schematic of the utility model embodiment.
Fig. 2 is the functional-block diagram of the utility model embodiment.
Among the figure: 1, transformer 2, magnetic flap level gauge 3, level transmitting device 4, pressure bridge 5, liquid level monitoring warning system 21, magnetic switch 31, pressure unit 32, V/I transducer 51, alarm 52, liquid level control display device.
Embodiment
In Fig. 1 and Fig. 2, a kind of power transformer oil level monitors warning device, comprise the magnetic flap level gauge 2 that is located on the transformer 1, magnetic flap level gauge 2 comprises liquid level gauge and magnetic switch 21, the magnetic switch 21 of magnetic flap level gauge 2 outputs to level transmitting device 3 by pressure bridge 4 circuit, level transmitting device 3 comprises pressure unit 31 and V/I transducer 32, pressure unit 31 is connected with V/I transducer 32, V/I transducer 32 is connected with liquid level monitoring warning system 5,, liquid level monitoring warning system 5 comprises alarm 51 and liquid level control display instrument 52.Color chips upset when the magnetic ball float in the magnetic flap level gauge 2 rises with liquid level, can show liquid level, installed magnetic switch 21 additional at magnetic flap level gauge 2, magnetic switch 21 is transformed into digital signal to analog signals by level transmitting device 3, and the liquid level that realizes 52 pairs of transformer oil of liquid level warning supervisory system is monitored or reported to the police.The pressure unit 31 of level transmitting device 3 is transformed into analog signals transformer oil pressure parameter the electric signal of standard, and V/I transducer 32 is a kind of circuit that can use voltage signal controlling output current.The two-wire system V/I transducer that the utility model V/I transducer 32 adopts, voltage signal is not directly to control output current, but controls whole circuit self power consumption electric current.Simultaneously, also will extract stable voltage from current loop is modulate circuit and magnetic switch 21 power supplies.
Pressure bridge 4 weak output signals all belong to mV level signal.This class small-signal generally all requires with pressure unit 31 it to be carried out the first order and amplifies.Magnetic switch 21 is sensor, the pressure unit 31 of generally selecting low imbalance, low temperature to waft.In two-wire system V/I converter applications, low-power consumption also is essential in addition.The pressure unit 31 that the utility model embodiment adopts is the accurate differential amplifier of AD623 low-power consumption, and the accurate differential amplifier of AD623 low-power consumption is commonly used in the amplification of difference output prime.The AD623 maximum 200uV that lacks of proper care, the temperature 1uV/ degree that wafts is used at general pressure inverting and have been guaranteed that precision is enough.The pressure bridge sensor of the utility model embodiment is equivalent to the resistance of a kilo-ohm of level, and power consumption is generally larger.The driving voltage that suitably reduces pressure bridge 4 can reduce the power consumption electric current.But output amplitude also descends thereupon, needs to improve the gain of the accurate differential amplifier of AD623 low-power consumption.Pressure bridge 4 sensor adopt the constant voltage power supply, most of semiconductor pressure sensor needs constant current-supplying could obtain preferably temperature characterisitic in the practical application, can consist of constant current source with an amplifier provide excitation for it.
At last, it is also to be noted that, what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from disclosed content of the present utility model all should be thought protection domain of the present utility model.
Claims (4)
1. a power transformer oil level monitors warning device, comprise the magnetic flap level gauge that is located on the transformer, the magnetic flap level gauge comprises liquid level gauge and magnetic switch, it is characterized in that the magnetic switch of magnetic flap level gauge is connected with the liquid level monitoring warning system by level transmitting device.
2. a kind of power transformer oil level according to claim 1 monitors warning device, it is characterized in that level transmitting device comprises pressure unit and V/I transducer, pressure unit is connected with the V/I transducer, and the V/I transducer is connected with the liquid level monitoring warning system.
3. a kind of power transformer oil level according to claim 1 and 2 monitors warning device, it is characterized in that magnetic switch outputs to level transmitting device by the pressure bridge circuit.
4. a kind of power transformer oil level according to claim 1 and 2 monitors warning device, it is characterized in that the liquid level monitoring warning system comprises alarm and liquid level control display instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527961 CN202853695U (en) | 2012-10-16 | 2012-10-16 | Power transformer oil level monitoring and warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527961 CN202853695U (en) | 2012-10-16 | 2012-10-16 | Power transformer oil level monitoring and warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202853695U true CN202853695U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220527961 Expired - Lifetime CN202853695U (en) | 2012-10-16 | 2012-10-16 | Power transformer oil level monitoring and warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202853695U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860487A (en) * | 2017-11-23 | 2018-03-30 | 上海置信电气股份有限公司 | The oil level and oil temperature integration monitoring method and device of distribution transformer |
| CN110987127A (en) * | 2019-12-30 | 2020-04-10 | 西安大易电子科技有限公司 | Online liquid level monitoring method and system for oil-immersed transformer |
-
2012
- 2012-10-16 CN CN 201220527961 patent/CN202853695U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860487A (en) * | 2017-11-23 | 2018-03-30 | 上海置信电气股份有限公司 | The oil level and oil temperature integration monitoring method and device of distribution transformer |
| CN110987127A (en) * | 2019-12-30 | 2020-04-10 | 西安大易电子科技有限公司 | Online liquid level monitoring method and system for oil-immersed transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiangshan City, Zhejiang city in Quzhou Province, the 324100 park open source road No. 1 Patentee after: KERUN ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: 324100, No. 1, Kaiyuan Road, Shanhai demonstration area, Jiangshan, Zhejiang, Quzhou Patentee before: ZHEJIANG KERUN POWER EQUIPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 324100 Jiangshan City, Quzhou, Zhejiang province Kaiyuan Road 1 Patentee after: KERUN INTELLIGENT CONTROL Co.,Ltd. Address before: 324100 Jiangshan City, Quzhou, Zhejiang province Kaiyuan Road 1 Patentee before: KERUN ELECTRIC POWER TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |