CN104298283A - Method for preventing cooling water of oil-water cooler from entering circulation oil pipe of transformer - Google Patents
Method for preventing cooling water of oil-water cooler from entering circulation oil pipe of transformer Download PDFInfo
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- CN104298283A CN104298283A CN201410429072.8A CN201410429072A CN104298283A CN 104298283 A CN104298283 A CN 104298283A CN 201410429072 A CN201410429072 A CN 201410429072A CN 104298283 A CN104298283 A CN 104298283A
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Abstract
The invention relates to a method for protecting a circulation oil pipe of a transformer, in particular to a method for preventing cooling water of an oil-water cooler from entering the circulation oil pipe of the transformer. According to the method, firstly, a manual adjusting valve is switched on, an oil pump is started, oil in an oil tank starts to circulate, and an oil pressure sensor and a flow meter automatically collects pressure and flow of a circulation system and transmits data and flow signals to a PLC system. If oil pressure parameters reach 0.5-0.6MPa, safe operation demands are met, and at this moment, a solenoid stop valve of a cooling circulation water pipeline is automatically switched on, a circulation water pump is automatically started, and water circulation is started. The method for preventing the cooling water of the oil-water cooler from entering the circulation oil pipe of the transformer is unique, solves the problem that the cooling water enters the internal circulation oil pipe of the transformer once special situations like sand holes, inner leakage and pipeline corrosion happen in the long-term operation of the oil-water cooler, and avoids the phenomenon that the service life of the transformer is affected due to the fact that the water enters the transformer and causes ageing of insulating oil.
Description
Technical field
The present invention relates to a kind of method protecting transformer circulating pipe, especially relate to a kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe.
Background technology
Metallurgy uses large and medium-sized furnace transformer, and long-term work is under overload state.In order to ensure the safe and reliable operation of furnace transformer, oil-water cooler must be adopted to carry out pressure cooling to transformer oil.Because oil-water cooler may occur the special circumstances such as trachoma, interior leakage, corrosion of piping when long-time running, if now the hydraulic pressure of oil-water cooler is greater than the pressure of transformer oil, the phenomenon that chilled water enters into inside transformer circulating pipe can be there is.And chilled water is once enter into circulating pipe, transformer oil will be scrapped, and cause direct economic loss more than 10 ten thousand, thus cause substantial equipment accident.
Also do not overcome the effective ways of above-mentioned defect at present.
Summary of the invention
The object of the invention is the defect overcoming prior art, there is provided a kind of method unique, solve oil-water cooler in long-time running once the chilled water occurring the special circumstances such as trachoma, interior leakage, corrosion of piping and occur enters into the problem of inside transformer circulating pipe, avoid and cause insulating oil aging and a kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe of affecting the serviceable life of transformer because water enters transformer.
The present invention realizes in the following way:
A kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe, it is characterized in that: first the method for open manual modulation valve, start oil pump, oil in fuel tank starts to carry out oil circulation, then oil pressure sensor and flowmeter will gather pressure and the flow of the circulation system automatically, and data and flow signal are transferred to PLC system, if oil pressure parameter reaches 0.5 ~ 0.6MPa, namely safe operation requirement is met, now, cooling circulating water pipeline electromagnetic stop valve is opened automatically, and water circulating pump starts automatically, starts water circulation;
After described recirculated water enters oil-water refrigerating mechanism, hydraulic pressure sensor detects the pressure of recirculated water automatically, and the cyclic hydrostatic pressure force signal detected is passed to PLC system, and PLC detects recycle oil, circulation operational factor;
When the pressure of described recirculated water is greater than the pressure of recycle oil, PLC compares the data detected, automatic regulating valve will regulate pressure and the flow of recycle oil automatically simultaneously, guarantee that the pressure of recycle oil is greater than the pressure 0.1 ~ 0.2MPa of recirculated water all the time; And once there is the system failure, in 5 seconds, the pressure of recycle oil cannot be adjusted to the scope being greater than circulating water pressure 0.1 ~ 0.2MPa automatically, and electromagnetic shut-off valve will be closed automatically, cut off recirculated water, avoid the chilled water of profit cooling recirculation system to enter into transformer circulating pipe.
The present invention has following effect:
1) method is unique: this method provided by the invention is the method is first open manual modulation valve, start oil pump, oil in fuel tank starts to carry out oil circulation, then oil pressure sensor and flowmeter will gather pressure and the flow of the circulation system automatically, and data and flow signal are transferred to PLC system, if oil pressure parameter reaches 0.5 ~ 0.6MPa, namely meet safe operation requirement, now, cooling circulating water pipeline electromagnetic stop valve is opened automatically, water circulating pump starts automatically, starts water circulation; The method first starts oil circulation, rear startup water circulation, ensure that chilled water can not enter into transformer circulating pipe, when the pressure of recirculated water is greater than the pressure of recycle oil, will automatically regulate pressure and the flow of recycle oil, the pressure of controlled circulation oil is greater than the pressure of recirculated water all the time in certain limit, if occur abnormal, circulating water pressure is greater than the overlong time of recycle oil pressure, then cut off water circulation, avoids chilled water to enter into transformer circulating pipe.
2) method provided by the invention is when oil-water cooler carries out pressure cooling to transformer, utilize the components and parts such as PLC, pressure transducer, electromagnetic shut-off valve, by the chain control between oil-water cooler, cooling circulating water pump, when effectively preventing from leaking in oil-water cooler, refrigeratory recirculated water enters transformer.
3) method provided by the invention, solve oil-water cooler in long-time running once the chilled water occurring the special circumstances such as trachoma, interior leakage, corrosion of piping and occur enters into the problem of inside transformer circulating pipe, avoid and cause insulating oil aging and serviceable life of affecting transformer because water enters transformer.
Accompanying drawing explanation
Fig. 1 the inventive method system schematic.
Embodiment
A kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe, as shown in Figure 1: the method is first open manual modulation valve 1, start oil pump 2, oil in fuel tank 3 starts to carry out oil circulation, then oil pressure sensor 4 and flowmeter 5 will gather pressure and the flow of the circulation system automatically, and data and flow signal are transferred to PLC system 6, if oil pressure parameter reaches 0.5 ~ 0.6MPa, namely safe operation requirement is met, now, cooling circulating water pipeline electromagnetic stop valve 7 is opened automatically, and water circulating pump 8 starts automatically, starts water circulation.
As shown in Figure 1: after described recirculated water enters oil-water refrigerating mechanism, hydraulic pressure sensor 9 detects the pressure of recirculated water automatically, and the cyclic hydrostatic pressure force signal detected is passed to PLC system 6, PLC detects recycle oil, circulation operational factor.
When the pressure of described recirculated water is greater than the pressure of recycle oil, PLC system 6 compares the data detected, automatic regulating valve 10 will regulate pressure and the flow of recycle oil automatically simultaneously, guarantee that the pressure of recycle oil is greater than the pressure 0.1 ~ 0.2MPa of recirculated water all the time; And once there is the system failure, in 5 seconds, the pressure of recycle oil cannot be adjusted to the scope being greater than circulating water pressure 0.1 ~ 0.2MPa automatically, and electromagnetic shut-off valve 7 will be closed automatically, cut off recirculated water, avoid the chilled water of profit cooling recirculation system to enter into transformer circulating pipe.
Fig. 1 the inventive method system schematic
Wherein, 1-manual modulation valve, 2-oil pump, 3-fuel tank, 4-oil pressure sensor, 5-flowmeter, 6-PLC system, 7-electromagnetic shut-off valve, 8-water pump, 9-hydraulic pressure sensor, 10-automatic regulating valve.
Claims (3)
1. the method preventing the chilled water of oil-water cooler from entering transformer circulating pipe, it is characterized in that: first the method for open manual modulation valve, start oil pump, oil in fuel tank starts to carry out oil circulation, then oil pressure sensor and flowmeter will gather pressure and the flow of the circulation system automatically, and data and flow signal are transferred to PLC system, if oil pressure parameter reaches 0.5 ~ 0.6MPa, namely safe operation requirement is met, now, cooling circulating water pipeline electromagnetic stop valve is opened automatically, and water circulating pump starts automatically, starts water circulation.
2. a kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe as claimed in claim 1, it is characterized in that: after described recirculated water enters oil-water refrigerating mechanism, hydraulic pressure sensor detects the pressure of recirculated water automatically, and the cyclic hydrostatic pressure force signal detected is passed to PLC system, PLC detects recycle oil, circulation operational factor.
3. a kind of method preventing the chilled water of oil-water cooler from entering transformer circulating pipe as claimed in claim 1 or 2, it is characterized in that: when the pressure of described recirculated water is greater than the pressure of recycle oil, PLC compares the data detected, automatic regulating valve will regulate pressure and the flow of recycle oil automatically simultaneously, guarantee that the pressure of recycle oil is greater than the pressure 0.1 ~ 0.2MPa of recirculated water all the time; And once there is the system failure, in 5 seconds, the pressure of recycle oil cannot be adjusted to the scope being greater than circulating water pressure 0.1 ~ 0.2MPa automatically, and electromagnetic shut-off valve will be closed automatically, cut off recirculated water, avoid the chilled water of profit cooling recirculation system to enter into transformer circulating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410429072.8A CN104298283A (en) | 2014-08-28 | 2014-08-28 | Method for preventing cooling water of oil-water cooler from entering circulation oil pipe of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410429072.8A CN104298283A (en) | 2014-08-28 | 2014-08-28 | Method for preventing cooling water of oil-water cooler from entering circulation oil pipe of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104298283A true CN104298283A (en) | 2015-01-21 |
Family
ID=52318056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410429072.8A Pending CN104298283A (en) | 2014-08-28 | 2014-08-28 | Method for preventing cooling water of oil-water cooler from entering circulation oil pipe of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104298283A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204525A (en) * | 2016-12-16 | 2018-06-26 | 中国石油化工股份有限公司 | The device and method of leak cooler safe operation in a kind of maintenance |
| CN111899969A (en) * | 2020-09-17 | 2020-11-06 | 江苏东晔电气设备有限公司 | Oil-immersed transformer for electric power |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176909A (en) * | 1982-04-09 | 1983-10-17 | Toshiba Corp | Water-cooling type oil-filled electric apparatus |
| CN202189648U (en) * | 2011-08-19 | 2012-04-11 | 浙江雁泉冷却器有限公司 | Forced oil circulation cooler for transformer |
| CN202258679U (en) * | 2011-10-28 | 2012-05-30 | 常德恒力调压器有限公司 | Forced oil-water-cooled pressure regulator |
| CN203011231U (en) * | 2013-01-06 | 2013-06-19 | 上海脉慧能源科技有限公司 | Anti-leakage control device of air compressor heat recovery heat exchanger |
| CN103306960A (en) * | 2012-03-08 | 2013-09-18 | 昆山能捷科技服务有限公司 | Energy-saving intelligent protection control system for heat exchanger of air compressor |
| CN203202566U (en) * | 2013-04-28 | 2013-09-18 | 天津大唐国际盘山发电有限责任公司 | Oil cooler oil leakage preventing device |
-
2014
- 2014-08-28 CN CN201410429072.8A patent/CN104298283A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176909A (en) * | 1982-04-09 | 1983-10-17 | Toshiba Corp | Water-cooling type oil-filled electric apparatus |
| CN202189648U (en) * | 2011-08-19 | 2012-04-11 | 浙江雁泉冷却器有限公司 | Forced oil circulation cooler for transformer |
| CN202258679U (en) * | 2011-10-28 | 2012-05-30 | 常德恒力调压器有限公司 | Forced oil-water-cooled pressure regulator |
| CN103306960A (en) * | 2012-03-08 | 2013-09-18 | 昆山能捷科技服务有限公司 | Energy-saving intelligent protection control system for heat exchanger of air compressor |
| CN203011231U (en) * | 2013-01-06 | 2013-06-19 | 上海脉慧能源科技有限公司 | Anti-leakage control device of air compressor heat recovery heat exchanger |
| CN203202566U (en) * | 2013-04-28 | 2013-09-18 | 天津大唐国际盘山发电有限责任公司 | Oil cooler oil leakage preventing device |
Non-Patent Citations (1)
| Title |
|---|
| 李卫萍: "PLC控制变压器强迫油循环系统", 《电工技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204525A (en) * | 2016-12-16 | 2018-06-26 | 中国石油化工股份有限公司 | The device and method of leak cooler safe operation in a kind of maintenance |
| CN108204525B (en) * | 2016-12-16 | 2019-09-27 | 中国石油化工股份有限公司 | The device and method of leak cooler safe operation in a kind of maintenance |
| CN111899969A (en) * | 2020-09-17 | 2020-11-06 | 江苏东晔电气设备有限公司 | Oil-immersed transformer for electric power |
| CN111899969B (en) * | 2020-09-17 | 2021-12-21 | 江苏东晔电气设备有限公司 | Oil-immersed transformer for electric power |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150121 |
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| RJ01 | Rejection of invention patent application after publication |