CN2532566Y - Explosion-proof fire-extinguishing device for oil-immersed transformer - Google Patents
Explosion-proof fire-extinguishing device for oil-immersed transformer Download PDFInfo
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- CN2532566Y CN2532566Y CN 02225196 CN02225196U CN2532566Y CN 2532566 Y CN2532566 Y CN 2532566Y CN 02225196 CN02225196 CN 02225196 CN 02225196 U CN02225196 U CN 02225196U CN 2532566 Y CN2532566 Y CN 2532566Y
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Abstract
Disclosed is a fire extinguishing equipment of anti-explosion and fireproof for an oil-immersed transformer. The utility model includes a fire protection cabinet, an installation valve, a flame detector, a nitrogen cylinder, a pressure relay of an oil tank, an examination valve, an exhaust valve and an electrical apparatus control part. The utility model is characterized in that a cut-off valve and a gas relay are arranged between the oil tank and an oil pillow; an oil-discharge pipe is connected with the installation valve of the oil tank; the examination valve and a quick oil-discharge valve with an operational mechanism is arranged at the middle of the oil-discharge pipe; one end of a nitrogen injection pipe is communicated with the bottom of the oil tank and the other end is connected with a pressure reducing valve on the nitrogen cylinder through an oil gas separating component and a nitrogen injection electro-magnetic valve. The utility mode adopts the oil discharge and nitrogen injection and has the functions of anti-explosion, fireproof and fire extinguishing. The possibility of the explosion and fire of the transformer is reduced in maximum limit. The utility model has the advantages of putting prevention firstly, the combination of prevention and fire extinguishing, quick response, sensitive actions, thoroughly fire extinguishing, widely source of nitrogen, convenient in installation and maintenance, reliable operating, moderate cost, high performance-price ratio and applicable to the 5MVA-240MVA oil-immersed transformers.
Description
Technical field
The present invention relates to the anti-explosion fire extinguishing device of power industry, power plant and substation transformer fire-fighting, safe operation technology, particularly a kind of oil-immersed type transformer.
Background technology
Power transformer is a most expensive and most important equipment in power plant and the transformer station, the overwhelming majority is used oil-immersed type transformer in the current power industry, and the transformer body contains a large amount of combustible materials, do not note very easily taking place the transformer blast slightly, catch fire, centre and equipment on every side, jeopardize safety, cause to have a power failure and great economic loss.According to investigation, the coil short accident probability of Chinese large-sized transformer (capacity is more than 31.5MVA) is 0.0117 time/year platform, wherein develop into 4.45% of the total platform number of accounting for of fire incident, annual because the direct and indirect economic loss that transformer fire causes is up to tens million of units.Therefore, pay particular attention to protection to transformer.
At present, to the protection of transformer mainly emphatically on the electric parameter, and to transformer fault, transformer insulated destroyed and produce pressure surge suddenly and cause the transformer blast to be protected.
For the transformer that catches fire, mainly adopt the mode of the water spray of stationary nozzle to put out a fire, but have the following disadvantages:
1, consider the safe distance of voltage, shower nozzle can not be too near to transformer, and when fire took place, shower nozzle was difficult to bring into play nebulization.
2, when the transformer explosion time, the spray pipe that is contained on the transformer is usually blown, the fire extinguishing of can't spraying.
3, in the environment of the many dirt of drying, the nozzle in the shower nozzle is easy to block, and can't use when the time comes, if will clear up, transformer will be out of service, cause power failure.
4, owing to corrosion, the iron rust of water supply and spray pipe is with spray nozzle clogging.
5, under the weather conditions of cold, when temperature is lower than Celsius subzero 5 when spending, spraying system can not be worked.
6, if carry out the water spray test, transformer even whole transformer station will have a power failure.
7, water injection system need be beaten deep well, builds fire cistern, establishes high-power fire pump, invests hugely, causes the substation site selection difficulty.
8, during the transformer breaking out of fire, often consider safety and whole transformer station had a power failure that this moment, fire pump can't be worked, can only sit back and wait that fire fighting truck rescues, when the time comes transformer burnt greatly gross distortion, thoroughly damage, can't repair.
9, water spray extinguishing is to utilize water at high temperature to form water vapour, and obstruct oxygen contacts with combustible, puts out and flame is stopped up, and after the stop-spraying, the deep fat of high temperature in the transformer (surpassing flash-point) is in a single day gushed out, and meets oxygen resume combustion immediately.
10, transformer water atomizing fire extinguishing system water consumption is very big, needs enough water source and deposit, and scale of investment is higher, is unfavorable for the protection to water resources.
In addition, utilize carbon dioxide to make the CO of firing-fighting medium, the fire extinguishing effect of carbon dioxide mainly is to stop up to put out, and it only is suitable for and is installed in indoor power transformer, and personal security is had certain threat.
Utilize halogenated compound to make the haloalkane extinguishing system of firing-fighting medium, it belongs to inhibition, only suitable indoor use, but alkyl halide has destruction to atmospheric ozone layer, is the product that international restriction is used, and China banned use of in 2010 years.
The fire great majority of oil-immersed type transformer are because the equipment internal fault and the actuating of relay are not prompt enough caused, oil temperature rises rapidly and surpasses 320 ℃ of the autoignition temperatures of transformer oil at the utmost point in the short time (have less than 1s), high-temperature electric arc makes oil decomposition produce the fuel gas of HTHP, be enough to make the transformer blast, form the inner and outside fire of transformer, because the quite high oil mass of temperature is quite a lot of again, to put out a fire at short notice and with oily temperature drop to autoignition temperature, making it can resume combustion be not very difficult, this class fire is in case take place, start water spray fire extinguish system and under the situation that local fire department in time participates in
Generally also will continue 2-3 hour, individual other surpasses 24 hours, so, also there is not the successful example of very fast reparation transformer after cooling fire extinguishing within a short period of time up to now.Its fire-fighting water yield of water spray fire extinguish system requires at 80-120L/S, and the water yield of water pump reaches 288-432m
3/ h uses fire pump capacity, pipe diameter, pumping plant and cistern scale quite big, invest very considerable, and serious waste precious water resource.
Summary of the invention
The problems referred to above and disadvantage in view of current transformer fire prevention exists the invention provides a kind of oil-immersed type transformer anti-explosion fire extinguishing device, to ensure the transformer safe operation and the security of the lives and property of power plant and transformer station.
This oil-immersed type transformer anti-explosion fire extinguishing device, comprise: FHC 1, valve 2 is installed, flame detector 6, be contained in the nitrogen cylinder 10 in the FHC 1, the pressure of the fuel tank device 7 that continues, service valve 8, vent valve 9 and electrical control part, it is characterized in that: between fuel tank and conservator, connect cut-off valve 5 and Buchholz relay, oil pipe 3 runs on the installation valve 2 of fuel tank, the centre of oil exit pipe 3 is connected to the quick drain valve 14 that service valve 8 and ribbon gymnastics are done mechanism 15, annotate nitrogen pipe 4 one ends and feed the fuel tank bottom, the other end is by oil gas barrier assembly 12, annotating nitrogen electromagnetically operated valve 13 connects on the pressure-reducing valve 11 of nitrogen cylinder.
This device adopts the oil draining nitrogen filling mode, has the anti-explosion fire fire-extinguishing function concurrently, can reduce the possibility of transformer blast and fire to greatest extent.Rely mainly on prevention, combine prevention with fire fighting, reaction is quick, is active in one's movements, and fire extinguishing is thorough, reduced investment, and floor space is less than 2m
2, firing-fighting medium---the nitrogen source is wide, very easily additional, and is very easy to management, the maintenance of device.This device is convenient for installation and maintenance, and is reliable, and cost is moderate, and the cost performance height is applicable to 5MVA-240MVA oil immersed power transformer and other various oil-immersed type transformers such as furnace transformer etc.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Tank pressure change curve when Fig. 2 is the transformer coil short circuit.
Embodiment
Major part shown in structural representation Fig. 1 is: FHC 1, installation valve 2, oil extraction pipeline 3, notes nitrogen pipeline 4, cut-off valve 5, flame detector 6, the pressure switch 7 of dress, service valve 8, vent valve 9, nitrogen cylinder 10, pressure-reducing valve 11, oil gas barrier assembly 12, notes nitrogen electromagnetically operated valve 13, quick drain valve 14, operating mechanism 15, elevated pressure nitrogen gas meter 16, low pressure nitrogen gas meter 17 and control cabinet etc. in the FHC.Cut-off valve 5 and Buchholz relay are connected between fuel tank and the conservator, oil exit pipe 3 is connected on the installation valve 2 of fuel tank, the centre of oil exit pipe 3 is connected to the quick drain valve 14 that service valve 8 and ribbon gymnastics are done mechanism 15, annotate nitrogen pipe 4 one ends and feed the fuel tank bottom, the other end connects on the pressure-reducing valve 11 of nitrogen cylinder 10 by oil gas barrier assembly 12 and notes nitrogen electromagnetically operated valve 13.
When breaking down in transformer inside, fuel tank internal produces a large amount of fuel gas, cause Buchholz relay action closing contact, make circuit breaker trip, surpass pressure-reducing valve set point and then start explosion-proof program if oil tank of transformer pressure continues to increase this moment, opens draining valve, the oil extraction release prevents that transformer is on fire from explosion.
Tank pressure change curve when Fig. 2 is the transformer coil short circuit.Wherein:
0 point appears in T0 insulation breakdown electric arc, the T1 transformer breaker triggers tripping operation (50～100ms) A point, T2 pressure-reducing valve operate time (under the setting pressure) B point, T2+0.2s anti-explosion fire fire extinguishing system start, the pressure C point that begins to descend, T3 pressure-reducing valve tripping transformer blast D point, T4 pressure-reducing valve release deficiency, though open, but still can cause transformer blast E point, the work of T5 anti-explosion fire fire extinguishing system is annotated nitrogen and is begun the F point.
When if transformer oil is on fire, the temperature-sensing element fusing of flame detector, signal is connected, control circuit starts the fire extinguishing program, opens filling the nitrogen electromagnetically operated valve, and nitrogen is annotated the nitrogen pipeline by pressure-reducing valve and oil gas barrier assembly and entered the fuel tank bottom, force the fuel tank internal transformer oil to stir, the oil of fuel tank lower temperature and high temperature oil are mixed, thereby make oily temperature drop under flash-point, and the flame of fuel tank extinguishes automatically.The effect of cut-off valve is to prevent that the oil in the conservator from watering on the fire of first combustion, the aggravation intensity of a fire.After accident treatment finishes, hand-reset.Key problem in technology of the present utility model is the special-purpose quick drain valve of development, and operate time before power transformer interior fault pressure raises blast, was opened draining valve less than 0.2 second in oil extraction, shed the transformer internal pressure, prevented the transformer blast.
Its electric control system carries out the misoperation of logic determines, anti-locking system to the transformer fault signal.Fault-signal is after judging establishment, and quick drain valve can be opened rapidly with interior at 0.2 second, effectively prevents transformer blast and on fire, and can knock down the flame.Control circuit can adopt the existing control circuit that can finish above-mentioned judgement control task, but the also circuit of design specialized.
Transformer is in service never to allow to occur bubble, with postpartum " light gas alarming ", when a large amount of bubbles occur, will produce " heavy gas alarming " and trigger the main switch tripping operation, the transformer stoppage in transit when a small amount of bubble occurs.This device is equipped with " oil gas barrier assembly " on notes nitrogen pipeline, guarantee that nitrogen can not enter in the transformer under the normal condition.
The oil gas barrier assembly is formed by brass car system, in adorn two oil resistant butyronitrile rubber diaphragms, the transformer oil oil pressure that diaphragm can bear 0.15MPa does not break, and keeps stablizing constant in 1.5 years; Under the nitrogen pressure of 0.4MPa impacts, break immediately, nitrogen can be passed through smoothly.On the pipeline between oil tank of transformer and the conservator, install " cut-off valve ", a large amount of fuel tanks that flow into of the oil when preventing fault in the conservator, action back locking is sent signal, hand-reset.
The main technical detail of FMD-10 anti-explosion fire extinguishing device is as follows:
Firing-fighting medium: purity nitrogen 99.99%;
Nitrogen cylinder volume: 2 * 40L;
Nitrogen nominal pressure: 13MPa-15Mpa in the nitrogen cylinder;
Quick drain valve operate time: less than 0.2S;
Attack time: be not more than 2min;
Annotate nitrogen time: 30-40min;
Annotate the nitrogen pipeline diameter: annotate nitrogen pipeline inside nominal diameter DN25mm;
Oil extraction pipeline diameter: oil extraction pipeline inside nominal diameter DN100mm or DN150mm;
Flame detector fusible member fusing point: 138 ℃ ± 7 ℃;
The pressure of nitrogen pressure-reducing valve outlet: 0.4Mpa～0.8Mpa (adjustable);
Operating power: DC220V 5A;
Dehumidifying heating power supply: AC220V 1000W.
This device is compared as follows table with the performance of domestic like product:
| FMD-100 | Water spray | Carbon dioxide | Alkyl halide | |
| Firing-fighting medium | Nitrogen | Water | Carbon dioxide | Alkyl halide |
| The scope of application | Indoor in the open, | In the open | Indoor | Indoor |
| Attack time (min) | About 2min | About 30min | About 10min | About 8min |
| The possibility of resume combustion | Do not have | Have | Have | Have |
| Cooling-down effect | Good | Better | Do not have | Do not have |
| Replenishing of firing-fighting medium | Can fill nitrogen throughout the country | The consumption of water resource | Additional carbon dioxide is difficulty | Restriction is used, and 2010 stop using, and are difficult to replenish |
| The design work amount | Simply | Complicated | Complicated | Complicated |
| Equipment investment relatively | 1 | 5.3 | 4.5 | 3.3 |
| Pollution to environment | Do not have | Less | Generally | Seriously |
| The installation of system | Parts are easily installed less | Pipeline is many, difficult to be installed | Difficult the installation | Difficult the installation |
| The maintenance of system | Simply, conveniently | Complicated | Complicated | Complicated |
| Functional reliability | High | Low | High | High |
Claims (3)
1, a kind of oil-immersed type transformer anti-explosion fire extinguishing device, comprise: FHC (1), valve (2) is installed, flame detector (6), be contained in the nitrogen cylinder (10) in the FHC, the pressure of the fuel tank device (7) that continues, service valve (8), vent valve (9) and electrical control part, it is characterized in that: between fuel tank and conservator, connect cut-off valve (5) and Buchholz relay, oil pipe (3) runs on the installation valve (2) of fuel tank, the centre of oil exit pipe (3) is connected to the quick drain valve (14) that service valve (8) and ribbon gymnastics are done mechanism (15), annotate nitrogen pipe (4) one ends and feed the fuel tank bottom, the other end is by oil gas barrier assembly (12), annotating nitrogen electromagnetically operated valve (13) connects on the pressure-reducing valve (11) of nitrogen cylinder.
2, oil-immersed type transformer anti-explosion fire extinguishing device according to claim 1 is characterized in that: described oil gas barrier assembly (12) is made up of copper parts and two rubber diaphragms being installed in the copper parts.
3, oil-immersed type transformer anti-explosion fire extinguishing device according to claim 2, it is characterized in that: described rubber diaphragm is made by the oil resistant nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02225196 CN2532566Y (en) | 2002-01-12 | 2002-01-12 | Explosion-proof fire-extinguishing device for oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02225196 CN2532566Y (en) | 2002-01-12 | 2002-01-12 | Explosion-proof fire-extinguishing device for oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532566Y true CN2532566Y (en) | 2003-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02225196 Expired - Lifetime CN2532566Y (en) | 2002-01-12 | 2002-01-12 | Explosion-proof fire-extinguishing device for oil-immersed transformer |
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| CN (1) | CN2532566Y (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1943822B (en) * | 2006-10-24 | 2010-05-12 | 长沙磐龙安全系统设备有限公司 | A fire fighting unit used to put out the fire on transformer and oil tank |
| CN100998913B (en) * | 2006-12-31 | 2011-01-19 | 保定天威集团有限公司 | Oil draining nitrogen filling fire extinguishing device for transformer |
| CN101268531B (en) * | 2005-11-16 | 2011-05-25 | Ctr工业制造股份有限公司 | Method and device for prevention and protection of electrical transformer against explosion and fire |
| CN102768896A (en) * | 2005-06-29 | 2012-11-07 | 菲利普·马尼耶 | Device for preventing explosion of transformer |
| CN101911222B (en) * | 2008-01-01 | 2013-08-28 | Ctr工业制造有限公司 | System and method for preventing, protecting OLTC from fire and/or transformer from explosion |
| CN104436477A (en) * | 2014-12-01 | 2015-03-25 | 国家电网公司 | Comprehensive fire fighting system and comprehensive fire fighting method of large-size oil-containing equipment of transformer substation |
| CN105185546A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | 75MVA transformer with mixed explosion-proof function |
| CN105185544A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | Fire-extinguishing and explosion-proof 75MVA transformer |
| CN105185545A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | 75 MVA transformer capable of realizing pressure relief and explosion prevention |
| CN105185543A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | Explosion-proof 75MVA transformer |
| CN105206406A (en) * | 2015-10-20 | 2015-12-30 | 夏烬楚 | Explosion-proof environment-friendly 75MVA transformer |
| CN106405290A (en) * | 2016-09-09 | 2017-02-15 | 中国电力科学研究院 | Combustion test apparatus for oil-immersed power transformers |
| CN106390335A (en) * | 2016-08-31 | 2017-02-15 | 常州市达克富尔环保科技有限公司 | Oil-draining and nitrogen-injecting fire extinguishing device comprising double oil draining systems |
| CN108281249A (en) * | 2018-03-23 | 2018-07-13 | 中国能源建设集团云南省电力设计院有限公司 | A kind of side casing transformer oil guard |
| CN110152223A (en) * | 2019-06-21 | 2019-08-23 | 中国科学技术大学 | A kind of extra-high voltage converter change safeguard structure |
| CN110504086A (en) * | 2019-09-16 | 2019-11-26 | 孙铭阳 | The pneumatic oil draining system of transformer fault |
| CN111710503A (en) * | 2020-07-07 | 2020-09-25 | 国网安徽省电力有限公司电力科学研究院 | Extra-high voltage converter variable force oil discharging and nitrogen injecting device, control system and method |
-
2002
- 2002-01-12 CN CN 02225196 patent/CN2532566Y/en not_active Expired - Lifetime
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768896A (en) * | 2005-06-29 | 2012-11-07 | 菲利普·马尼耶 | Device for preventing explosion of transformer |
| CN102768896B (en) * | 2005-06-29 | 2015-04-01 | 菲利普·马尼耶 | Device for preventing explosion of transformer |
| CN101268531B (en) * | 2005-11-16 | 2011-05-25 | Ctr工业制造股份有限公司 | Method and device for prevention and protection of electrical transformer against explosion and fire |
| CN1943822B (en) * | 2006-10-24 | 2010-05-12 | 长沙磐龙安全系统设备有限公司 | A fire fighting unit used to put out the fire on transformer and oil tank |
| CN100998913B (en) * | 2006-12-31 | 2011-01-19 | 保定天威集团有限公司 | Oil draining nitrogen filling fire extinguishing device for transformer |
| CN101911222B (en) * | 2008-01-01 | 2013-08-28 | Ctr工业制造有限公司 | System and method for preventing, protecting OLTC from fire and/or transformer from explosion |
| CN104436477A (en) * | 2014-12-01 | 2015-03-25 | 国家电网公司 | Comprehensive fire fighting system and comprehensive fire fighting method of large-size oil-containing equipment of transformer substation |
| CN104436477B (en) * | 2014-12-01 | 2017-09-08 | 国家电网公司 | The large-scale oily plant of transformer station integrates fire-fighting system and method |
| CN105185543A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | Explosion-proof 75MVA transformer |
| CN105185545A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | 75 MVA transformer capable of realizing pressure relief and explosion prevention |
| CN105185544A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | Fire-extinguishing and explosion-proof 75MVA transformer |
| CN105206406A (en) * | 2015-10-20 | 2015-12-30 | 夏烬楚 | Explosion-proof environment-friendly 75MVA transformer |
| CN105185546A (en) * | 2015-10-20 | 2015-12-23 | 夏烬楚 | 75MVA transformer with mixed explosion-proof function |
| CN106390335A (en) * | 2016-08-31 | 2017-02-15 | 常州市达克富尔环保科技有限公司 | Oil-draining and nitrogen-injecting fire extinguishing device comprising double oil draining systems |
| CN106405290A (en) * | 2016-09-09 | 2017-02-15 | 中国电力科学研究院 | Combustion test apparatus for oil-immersed power transformers |
| CN108281249A (en) * | 2018-03-23 | 2018-07-13 | 中国能源建设集团云南省电力设计院有限公司 | A kind of side casing transformer oil guard |
| CN108281249B (en) * | 2018-03-23 | 2024-01-30 | 中国能源建设集团云南省电力设计院有限公司 | Side sleeve transformer oil baffle device |
| CN110152223A (en) * | 2019-06-21 | 2019-08-23 | 中国科学技术大学 | A kind of extra-high voltage converter change safeguard structure |
| CN110152223B (en) * | 2019-06-21 | 2024-03-29 | 中国科学技术大学 | Extra-high voltage converter transformer protection structure |
| CN110504086A (en) * | 2019-09-16 | 2019-11-26 | 孙铭阳 | The pneumatic oil draining system of transformer fault |
| CN111710503A (en) * | 2020-07-07 | 2020-09-25 | 国网安徽省电力有限公司电力科学研究院 | Extra-high voltage converter variable force oil discharging and nitrogen injecting device, control system and method |
| CN111710503B (en) * | 2020-07-07 | 2024-05-28 | 国网安徽省电力有限公司电力科学研究院 | Extra-high voltage converter transformer power oil discharge and nitrogen injection device, control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN HUADIAN POWER FIRE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WANG YANJING; PATENTEE Effective date: 20070608 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070608 Address after: 7 building, block C, head industrial zone, east corner, Houhai Road, Nanshan District, Guangdong, Shenzhen 518067, China Patentee after: Shenzhen Huadian electric fire fighting Technology Co., Ltd. Address before: 518000 No. 2054 South Baoan Road, Shenzhen, Guangdong 302 Co-patentee before: Li Junrui Patentee before: Wang Yanjing |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120112 Granted publication date: 20030122 |