CN108281894B - Transformer reignition fire internal and external fire alarm and linkage control system - Google Patents
Transformer reignition fire internal and external fire alarm and linkage control system Download PDFInfo
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- CN108281894B CN108281894B CN201810238381.5A CN201810238381A CN108281894B CN 108281894 B CN108281894 B CN 108281894B CN 201810238381 A CN201810238381 A CN 201810238381A CN 108281894 B CN108281894 B CN 108281894B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
Abstract
A transformer re-ignition internal and external fire alarm and linkage control system comprises a re-ignition internal and external fire alarm controller, a false action prevention and refusal action prevention fire part positioning and logic starting signal monitoring device, a dry powder fire extinguishing system re-ignition fire extinguishing assembly, an oil discharge and nitrogen injection fire extinguishing system false action prevention assembly and an alternating current/direct current power supply; the invention has the beneficial effects that: the problems that the transformer fire alarm and fire extinguishing control mode cannot carry out local fire alarm and positioning of the transformer, cannot carry out re-ignition alarm and re-ignition fixed-point fire extinguishing, an external fire extinguishing system is easily influenced by wind speed and rainfall and the like are solved. The dry powder fire extinguishing device meets the requirements of extinguishing fire by internal fire and external fire and shielding fire of the transformer, has the advantages of high dry powder fire extinguishing efficiency, extinguishing the fire for only 10-15 seconds once, repeated multiple fire extinguishing conditions, no transformer oil flowing problem caused by water fire protection, and effective reduction of air pollution and water pollution generated in the fire extinguishing process.
Description
Technical Field
The invention belongs to fire-fighting facilities of transformer substations, and particularly relates to a transformer reignition fire internal and external fire alarm and linkage control system technology.
Background
For a long time, the main transformer fire-fighting design of the core equipment of the transformer substation mainly focuses on arranging fire-proof intervals or fire-proof walls among the main transformers, arranging an oil storage tank and an oil discharge system of the transformer within the range of 10-1.5 m of the appearance of the transformer, discharging transformer oil when a fire disaster occurs, and arranging fire extinguishing systems such as water spray, foam spray, dry powder, nitrogen injection and the like outside the body of the transformer for extinguishing the fire.
58 minutes in 1978, 10 months, 4 days and 2 minutes, a 12 ten thousand volt-ampere transformer of a power plant in the area of Zhenjiang in Jiangsu province has serious fire and explosion accidents, and a large amount of transformer oil is sprayed out of a surrounding oil pool, so that 3 persons die and 12 persons are injured by workers under maintenance, and 80 ten thousand yuan of property loss is caused; in 2009, 6 months and 25 days, early morning at 5 o 'clock, a 500kV home-paved transformer substation 1# main transformer A in Wuhan mountainous area generates a medium explosion fire, transformer oil is sprayed to the vicinity of an oil pool to cause a large-area fire, a fire extinguishing system is influenced by a transformer sleeve and a radiator, a fire extinguishing agent cannot reach the fire position of a transformer, a fire extinguishing agent in a fire extinguishing system outside the transformer cannot enter the transformer to extinguish the fire in the transformer, a one-time fire extinguishing control mode cannot extinguish the re-ignition fire of the transformer, the fire extinguishing effect is poor, and finally, a fire brigade adopts 6 water guns for more than two hours to extinguish the fire at 7 o' clock and 18 minutes; 17 o 16 o ' clock in 5 th and 19 th month in 2010, a 500kV transformer substation near a B factory of a Guangxi guest power plant generates a top high-voltage bushing moderate explosion fire, a flame rises to about 20 m height, transformer oil splashes outside a transformer oil pool on one side of a bushing to cause a large-area fire, part of equipment of a fire extinguishing system fails in a long time, part of equipment fails under a logic starting condition, 18 o 06 o ' clock, a nearby fire fighting team fire truck arrives at the site, 19 o 16 o ' clock, and the fire is successfully extinguished after the fire fighting team takes about 1 hour; in 22 days 7 months in 2015, a high-voltage bushing and a lifting seat of a 500kV transformer substation 1# main transformer A phase 250MVA transformer explode, so that the high-voltage bushing and the lifting seat of the transformer are all exploded, the exploded transformer parts simultaneously destroy a pipe network of a transformer water spray fire extinguishing system, so that the water spray fire extinguishing system fails, and a large amount of transformer oil is sprayed out from the joint of the high-voltage bushing lifting seat and a transformer body, wherein about 60% of the transformer oil accounting for the total oil quantity of the single-phase transformer is discharged to a total accident oil tank along an accident oil discharge system, about 20% of the transformer oil is sprayed onto adjacent (1 # main transformer B phase and 2# main transformer C phase) transformers, a main transformer site, a main transformer firewall, a main cable trench, a 500kV power distribution site and a main transformer transportation road, and the rest about 20% of the transformer oil is remained in the transformer body, and after air is met, the sprayed transformer oil temperature is far higher than the self-ignition point temperature, so that a large-area transformer fire spreading fire, a continuous fire and a re-ignition fire are formed in the transformer oil spraying range. The transformer time of being on fire 22 days early morning 1 o 22 minutes, 2 o 'clock fire brigade reachs the scene of a fire of transformer substation, 2 o 25 minutes transformer substation load transfer finishes, 1#, 2# main transformer is whole to get into cold reserve, the fire brigade begins to put out a fire, 2 o 55 minutes, transformer and the scene open fire around put out, 5 o' clock all conflagrations put out in the morning, afterwards, conflagration transformer oil burns completely basically, after the fire brigade adopted the fire engine water fire control, a small amount of transformer oil is arranged outside the station through road and place drainage system, cause the surrounding environment pollution.
From the above case of fire, because the transformer fire alarm and linkage fire extinguishing control mode and the fire extinguishing system selection do not conform to the transformer fire extinguishing characteristics, although the state invests a lot of fire extinguishing systems and alarm control systems for transformers, the fire extinguishing system and the alarm control systems can not play a fire extinguishing role basically in the face of explosion fire above the transformer with medium level, usually, a fire hydrant with small investment plays a real fire extinguishing role, meanwhile, the fire fighting department reflects that fire extinguishing of the fire hydrant is affected by a transformer shelter, the fire extinguishing efficiency is low, the fire extinguishing time is long, a large amount of air pollution problems are brought by long-time fire extinguishing, transformer oil trickling generated during fire extinguishing of the fire hydrant can cause serious water pollution around a transformer substation, and the fire extinguishing system of the fire hydrant is difficult to play a role in water shortage areas; the existing transformer fire extinguishing system in the fire case can not play the role of fire extinguishing for more reasons: when the transformer has a moderate explosion fire, the transformer bushing and the bushing lifting seat only have explosion oil injection, and simultaneously, an external fire inside the transformer occurs, and because the fire extinguishing agent of the fire extinguishing system outside the transformer is shielded by the bushing, influenced by wind speed, rainfall and the like, the external fire extinguishing system is difficult to spray the fire extinguishing agent to the external fire part for extinguishing fire and spray the fire extinguishing agent into the transformer for extinguishing fire; the method is characterized in that a partial fire disaster happens in most cases outside a transformer, a transformer fire disaster alarm system cannot perform transformer partial fire disaster alarm positioning and repeat fire disaster alarm, one fourth or one half of transformer fire disasters are blindly sprayed and extinguished in a one-time full-coverage mode, fire parts are not protected enough, excessive extinguishing agents are wasted in fire parts, and when a high-temperature transformer oil reignites, reignition fire disaster alarm and fixed-point fire extinguishment cannot be performed; the problem of refusing action of the fire extinguishing system is caused by excessive logic starting signals of the fire extinguishing system of the transformer; when a serious explosion fire disaster occurs, parts such as a transformer bushing, a lifting seat and the like can be blown away, the sprayed transformer oil is larger, the fire disaster range is wider, and the problems are more serious; therefore, in order to solve the problem that the existing transformer fire extinguishing system cannot extinguish the internal fire and the external fire of the transformer, and solve the problems that the transformer fire alarm fire extinguishing control mode cannot perform local fire alarm positioning on the transformer, cannot perform re-ignition alarm fire-reignition fixed-point fire extinguishing, the external fire extinguishing system is easily influenced by wind speed and rainfall, and the logic starting signal of the transformer fire extinguishing system is too much to cause system refusal, a novel transformer re-ignition internal and external fire alarm and linkage control system is needed to be arranged to adapt to the fire extinguishing characteristics of the transformer.
Disclosure of Invention
The invention aims to provide a transformer substation reignition internal and external fire alarm and linkage control system, which solves the problems that the existing transformer fire extinguishing system cannot extinguish internal and external fire of a transformer, and solves the problems that the transformer fire alarm fire extinguishing control mode cannot perform local fire alarm positioning on the transformer, the reignition alarm reignition fixed-point fire extinguishing cannot be performed, an external fire extinguishing system is easily influenced by wind speed and rainfall, and the system is refused to operate due to excessive logic starting signals of the transformer fire extinguishing system. Through the fire extinguishing test, the dry powder-oil discharge nitrogen injection fire extinguishing system with small influence on the shielding object of the transformer is selected, internal and external fire of the transformer and fire extinguishing by shielding the fire are met, meanwhile, due to the fact that the dry powder fire extinguishing efficiency is high, the time of fire extinguishing is only 10-15 seconds, the dry powder fire extinguishing system has the repeated fire extinguishing condition, the problem of transformer oil flowing caused by water fire fighting is avoided, air pollution and water pollution generated in the fire extinguishing process are effectively reduced, and the national investment waste is reduced through the series of measures.
The technical scheme of the invention is as follows:
through transformer fire case collection and analysis, comprehensive control of problems of a transformer alarm and linkage fire extinguishing control system, combination of unit project achievement of transformer fire-fighting facility science and technology, novel transformer re-ignition internal and external fire alarm and linkage control system setting system scheme and logic control program, through full-size transformer re-ignition internal and external fire and fire shielding fire extinguishing test, feasibility of an improved innovation part of a verification system, novel transformer re-ignition internal and external fire alarm and linkage control system formed through improvement, requirements of transformer explosion fire alarm and fire extinguishing control are met
A transformer reignition internal and external fire alarm and linkage control system comprises a reignition internal and external fire alarm controller, a false-action-prevention and rejection-prevention fire position positioning and logic starting signal monitoring device, a dry powder fire extinguishing system reignition fire extinguishing assembly, an oil discharge and nitrogen injection fire extinguishing system false-action prevention assembly and an alternating current/direct current power supply; wherein:
the internal and external fire alarm controller for the composite fire consists of a junction box connected to the internal and external fire alarm controller for the composite fire, an infrared and ultraviolet dual-band fire detector connected with a power line through an alarm line, a fire scene audible and visual alarm, a manual alarm button with a telephone jack, and a programmable composite fire internal and external fire extinguishing control program of an alarm control system;
the false-action and rejection-prevention fire location and logic starting signal monitoring device consists of logic starting signal switches such as an internal and external fire alarm controller connected with a reignition fire, an RS232/CAN bus converter connected with the false-action and rejection-prevention fire location and logic starting signal monitoring device, an analog signal line connected with the false-action and rejection-prevention fire location and logic starting signal monitoring device, an infrared thermometer connected with the analog signal line, an air velocity sensor, a rainfall sensor, a network cable connected with the false-action and rejection-prevention fire location and logic starting signal monitoring device, a network switch, an optical fiber connected with the network switch, a special equipment box connected with the optical fiber, a network cable connected with the special equipment box, an image type fire detector connected with the network cable, and a three-side circuit breaker tripping connected with the false-action and rejection-prevention fire location and logic starting signal monitoring device;
the composite fire extinguishing assembly of the dry powder fire extinguishing system consists of a dry powder fire extinguishing system convergence box, a dry powder fire extinguishing starting gas cylinder connected to the dry powder fire extinguishing system convergence box, a dry powder fire extinguishing driving gas cylinder connected with the dry powder fire extinguishing starting gas cylinder, a dry powder fire extinguishing driving gas cylinder connected with an inlet of the dry powder tank, an outlet of the dry powder tank connected with a dry powder main pipe, the dry powder main pipe connected with a plurality of dry powder partition selecting valves, a dry powder partition selecting valve connected with a dry powder branch pipe, the dry powder branch pipe connected with a dry powder spray nozzle control valve and a dry powder spray nozzle, the dry powder fire extinguishing system convergence box is connected with a field fire extinguishing control cabinet through a control line, the dry powder partition selecting valve and the dry powder spray nozzle control valve are connected with the dry powder fire extinguishing system convergence box through the control line, the field fire extinguishing control cabinet is connected with a composite fire internal and external fire alarm controller, and the composite fire internal and external fire alarm controller controls fire to extinguish fire; the dry powder main pipe is additionally connected with a pipe network sweeping starting gas cylinder, a pipe network sweeping gas cylinder and a pipe network sweeping control valve, and the sweeping gas cylinder is started to sweep the dry powder pipe network after each time of spraying fire extinguishing is finished, so that the dry powder pipe network is prevented from being blocked;
the misoperation-preventing component of the oil-discharging and nitrogen-injecting fire-extinguishing system consists of an oil-discharging and nitrogen-injecting system control box, an oil-discharging heavy hammer mechanism, an oil-discharging maintenance valve and an oil-discharging and nitrogen-injecting interlocking valve which are opened by the oil-discharging heavy hammer mechanism, an oil-discharging pipe, which is connected with a transformer, of the oil-discharging pipe, a transformer oil-discharging valve, which is close to the side of the transformer, of the oil-discharging pipe, a misoperation-preventing oil-discharging selection valve for partition protection, a nitrogen-injecting heavy hammer mechanism, a nitrogen-injecting valve, which is opened by the nitrogen-injecting heavy hammer mechanism in a delayed manner, a nitrogen-injecting starting gas cylinder, a nitrogen-injecting fire-extinguishing gas cylinder, a misoperation-preventing nitrogen-injecting selection valve, a throttling valve and a nitrogen-injecting maintenance valve.
The invention relates to a composite fire internal and external fire alarm and linkage fire extinguishing control system of a transformer, wherein a non-contact infrared ultraviolet dual-waveband fire detector of the transformer is arranged at the high position of a transformer fire extinguishing system pipe network or an outgoing line framework on two sides of the transformer in a diagonal or linear arrangement mode; the programmable re-ignition fire internal and external fire extinguishing control program set by the alarm control system is different from a disposable jet fire extinguishing program used by the existing transformer fire extinguishing system, is a special control program specially formulated according to the characteristics of re-ignition fire of the transformer, fire hazard of internal and external fire, and environmental and logic starting conditions, and can repeatedly perform fire alarm, system reset and repeated fire extinguishing if secondary or repeated re-ignition occurs after fire alarm linkage fire extinguishing is performed for one time and fire extinguishing information is printed.
The invention relates to a device for positioning and logically starting a fire position for preventing maloperation and refusal action in a transformer reignition internal and external fire alarm and linkage fire extinguishing control system, wherein an infrared temperature indicator is arranged on a fire explosion-proof device of a pipe network of a transformer fire extinguishing system and is opposite to fire positions such as sleeve flanges, voltage regulating switch flanges and the like of a transformer; the system is provided with a wind speed sensor, a rainfall sensor and a tripping logic starting signal switch of the three-side circuit breaker of the transformer, and provides wind speed and rainfall influence data of a fire scene of the transformer and a tripping power-off signal of the circuit breaker of the transformer in real time by combining fire images. The misoperation and the blind action of the fire extinguishing system are eliminated, in many fire cases, a transformer pressure relay and a gas relay do not act, only a tripping logic starting signal switch of a three-side circuit breaker of the transformer is arranged, and the pressure and the gas relay are eliminated to serve as starting logic signals of the fire extinguishing system to cause the refusal of the fire extinguishing system; when the fire extinguishing control program sets the wind speed rainfall to affect the fire extinguishing effect in the internal and external fire extinguishing control program of the re-burning fire, the fire extinguishing system is started to extinguish the fire after the wind speed rainfall is reduced temporarily, and when the time is longer, the oil discharging and nitrogen injecting fire extinguishing system which is not affected by the wind speed and the rainfall is started first to extinguish the fire in the transformer;
the reignition fire extinguishing times of the reignition fire extinguishing assembly of the dry powder fire extinguishing system in the transformer reignition internal and external fire alarm and linkage fire extinguishing control system can be repeated for at least 4 times for one half of local or overall fire of the transformer; for most local one-third or one-fourth external fires, the fire can be extinguished at least 12-16 times; the dry powder spray nozzle control valve is arranged in front of the dry powder spray nozzle, and the dry powder spray nozzle control valve and the dry powder spray nozzle at the corresponding position are opened in a linkage manner to the fire position positioned by the infrared temperature indicator for spraying and extinguishing fire through the control of the internal and external fire extinguishing control program of the reignition fire. The re-ignition fire extinguishing component of the dry powder fire extinguishing system is arranged at a safe position with less influence of explosion fire of the transformer, fire prevention measures need to be taken when the re-ignition fire extinguishing component is close to the transformer, the re-ignition fire extinguishing times of the re-ignition fire extinguishing component of the dry powder fire extinguishing system are measured once by fire extinguishing test data of a fire model of a physical size in 10-15 seconds, and the requirement that the quantity of dry powder sprayed in 60 seconds in national standard can be repeatedly extinguished for 4 times in theory on the overall fire of the transformer is met.
The invention relates to an anti-misoperation component of an oil discharge and nitrogen injection fire extinguishing system and a re-ignition fire extinguishing component of a dry powder fire extinguishing system, wherein the anti-misoperation component is arranged close to the re-ignition fire extinguishing component of the dry powder fire extinguishing system; setting a tripping logic starting signal switch of a three-side breaker of the transformer, and taking a pressure eliminating and gas relay as a starting logic signal of the fire extinguishing system to cause the fire extinguishing system to refuse to operate due to the fact that the oil discharging and nitrogen injecting fire extinguishing system does not operate actually; the fire disaster temperature + image is adopted to position the fire disaster part, so that the requirements of fire extinguishing control remote control and on-site control fire extinguishing action reliability are met, and the maloperation of starting the fire disaster in the control aspect of the prior oil-discharging nitrogen-injecting fire extinguishing system is eliminated; the oil discharge heavy hammer mechanism, the nitrogen injection heavy hammer mechanism, the oil discharge and nitrogen injection interlocking valve, the misoperation prevention oil discharge selection valve and the misoperation prevention nitrogen injection selection valve are respectively adopted, and the mechanical and manual operation misoperation of the system is eliminated.
The transformer reignition fire internal and external fire alarm and linkage control system can also control a transformer water spray-oil discharge nitrogen injection fire extinguishing system or a transformer foam spray-oil discharge nitrogen injection fire extinguishing system, and the fire extinguishing time of each time of water spray or foam spray is controlled to be about 6 minutes according to the fire extinguishing test result;
the invention has the following beneficial effects: the transformer reignition internal and external fire alarm and linkage control system is a fire alarm and fire extinguishing control system which accords with the fire extinguishing characteristics of a transformer, and can solve the problems that the transformer fire alarm fire extinguishing control mode cannot perform local fire alarm positioning of the transformer, cannot perform reignition alarm reignition fixed-point fire extinguishing, an external fire extinguishing system is easily affected by wind speed and rainfall, and the system is refused to operate due to excessive logic starting signals of the transformer fire extinguishing system. Through the fire extinguishing test, the dry powder-oil discharge nitrogen injection fire extinguishing system with small influence on the shielding object of the transformer is selected, internal and external fire of the transformer and fire extinguishing by shielding the fire are met, meanwhile, due to the fact that the dry powder fire extinguishing efficiency is high, the time of fire extinguishing is only 10-15 seconds, the dry powder fire extinguishing system has the repeated fire extinguishing condition, the problem of transformer oil flowing caused by water fire fighting is avoided, air pollution and water pollution generated in the fire extinguishing process are effectively reduced, and the national investment waste is reduced through the series of measures.
Drawings
FIG. 1 is a schematic wiring diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the logic relationship of the fire extinguishing control program for internal and external fire of the reburning fire of the present invention.
Detailed Description
The following describes the transformer reignition internal and external fire alarm and linkage control system in accordance with the present invention with reference to the accompanying drawings.
Referring to fig. 1, a composite fire internal and external fire alarm controller 1 assembly, wherein a transformer non-contact infrared ultraviolet dual-band fire detector A2 is arranged at the high position of a transformer fire extinguishing system pipe network or an outgoing line framework on two sides of a transformer in a diagonal or linear arrangement mode, a programmable composite fire internal and external fire extinguishing control program A6 arranged by an alarm control system is different from a disposable jet fire extinguishing program used by the existing transformer fire extinguishing system, and is a special control program specially formulated aiming at the composite fire of the transformer, the characteristics of the internal and external fire, the environment and the logic starting conditions, when one-time fire alarm linkage fire extinguishing is carried out, if secondary or multiple composite fire occurs, the fire alarm, system reset and repeated fire extinguishing can be carried out repeatedly;
referring to fig. 1, a false-action and false-action preventing fire location positioning and logic starting signal monitoring device 2 assembly is provided, wherein an infrared temperature indicator B7 is arranged on a transformer fire extinguishing system pipe network fire explosion-proof device and is over against fire locations such as sleeve flanges and voltage regulating switch flanges of a transformer, image type fire detectors B4 are arranged at two sides of the transformer and can monitor the fire panorama of the transformer, and the two sets of image type fire detectors provide accurate fire location positioning information by displaying different temperature values and fire images of different sides of the fire locations and non-fire locations; the wind speed sensor B8 and the rainfall sensor B9 are arranged at the positions of the fire extinguishing system equipment outside the influence range of the explosion fire of the transformer; the original circuit breaker tripping signal of a tripping logic starting signal switch B11 of the three-side circuit breaker of the transformer is provided by transformer control equipment; fire location information, wind speed and rainfall information and tripping information of three-side circuit breakers of the transformer are simultaneously displayed on the misoperation-preventing and movement-refusing fire location and logic starting signal monitoring device 2, the displayed contents are simultaneously connected to a transformer substation integrated automatic monitoring system or even a remote power transmission system through lines to be adjusted harmoniously, a controller can combine fire temperature image location information, real-time transformer fire site wind speed and rainfall data and transformer circuit breaker tripping and power failure signals, and a telecontrol or site operation fire extinguishing system carries out initial fire and re-firing fixed-point fire extinguishing to eliminate misoperation and blind action of the fire extinguishing system; in many fire cases, a transformer pressure relay and a gas relay do not act, only a tripping logic starting signal switch B11 of a three-side breaker of the transformer is arranged, and the pressure elimination and gas relay is used as a fire extinguishing system starting logic signal to fail to act to cause the fire extinguishing system to refuse to act; when the wind speed rainfall influences the fire extinguishing effect through the re-burning internal and external fire extinguishing control program A6, the fire extinguishing system is started to extinguish fire after the wind speed rainfall is temporarily reduced, and when the time is longer, the misoperation preventing oil discharging and nitrogen injecting fire extinguishing system which is not influenced by the wind speed and the rainfall is started first to extinguish the fire in the transformer;
referring to fig. 1, a re-ignition fire extinguishing assembly 3 of the dry powder fire extinguishing system is arranged at a safe position with less influence of explosion fire of a transformer, fire prevention measures need to be taken when the re-ignition fire extinguishing assembly is close to the transformer, the re-ignition fire extinguishing times of the fire extinguishing system of the re-ignition fire extinguishing assembly 3 of the dry powder fire extinguishing system are measured once by fire extinguishing test data of a fire model with the size of a real object in 10-15 seconds, the quantity of dry powder sprayed in 60 seconds meeting the national standard theoretically can be repeatedly extinguished for 4 times for the overall fire of the transformer, and can be extinguished for 12-16 times for most of local one third or one fourth of external fires; in order to match fixed-point fire extinguishing after fire alarm positioning, a dry powder spray head control valve C8 is arranged in front of a dry powder spray head C9, and the dry powder spray head control valve C8 and the dry powder spray head C9 at corresponding positions can be opened in a linkage manner to extinguish fire at the fire position positioned by an infrared point thermometer B7 under the control of a re-ignition internal and external fire extinguishing control program A6; the dry powder main pipe is additionally connected with a pipe network purging starting gas cylinder C10, a pipe network purging gas cylinder C11 and a pipe network purging control valve C12, and the purging gas cylinder is started to purge the dry powder pipe network C5 after each spraying fire extinguishing is finished, so that the dry powder pipe network is prevented from being blocked;
referring to fig. 1, an anti-misoperation component 4 of the oil-discharging and nitrogen-injecting fire extinguishing system is arranged close to a re-ignition fire extinguishing component 3 of the dry powder fire extinguishing system, the dry powder and the nitrogen-injecting fire extinguishing system share an alarm and fire-extinguishing re-ignition internal and external fire alarm controller 1, and a false-operation and false-operation-preventing fire location and logic starting signal monitoring device 2 is used for preventing electrical control and detector cause false operation in the case of false operation of the oil-discharging and nitrogen-injecting system; a tripping logic starting signal switch B11 of a three-side breaker of the transformer is arranged, and pressure is eliminated, and a gas relay is used as a starting logic signal of the fire extinguishing system to reject the action of the oil-discharging nitrogen-injecting fire extinguishing system caused by the fact that the fire extinguishing system does not actually act; the fire temperature and image fire position positioning are adopted, the requirements of fire extinguishing control remote control and on-site control fire extinguishing action reliability are met, and the serious misoperation that the fire is started first in the control aspect of the conventional oil-discharging nitrogen-injecting fire extinguishing system is eliminated; the novel oil discharge heavy hammer mechanism D2, the nitrogen injection heavy hammer mechanism D10, the oil discharge and nitrogen injection interlocking valve D12, the anti-misoperation oil discharge selection valve D4, the anti-misoperation nitrogen injection selection valve D13 and other components are adopted, during action, the oil discharge and oil discharge heavy hammer mechanism D2 is electrically started, mechanical motion is used for opening the oil discharge inspection valve D3/the oil discharge and nitrogen injection interlocking valve D12 in sequence, after a period of time is delayed, the nitrogen injection heavy hammer mechanism D10 is restarted, the nitrogen injection valve is opened, the problem of mechanical misoperation of the oil discharge and nitrogen injection fire extinguishing system is solved, the fire extinguishing time of a transformer is longer, oil mist generated by explosion of transformer oil is mixed in the initial fire, particularly when a lateral sleeve of the transformer explodes, whether quick starting of the oil discharge and nitrogen injection fire extinguishing system is beneficial to fire extinguishing of the transformer or not is difficult to judge, the possibility of accelerating the outflow of the transformer oil to cause a larger fire is accelerated, therefore, the accuracy reliability and the effectiveness of starting of the fire extinguishing system are more important than those of the quick starting of the oil discharge and nitrogen injection fire extinguishing system, after the actions are confirmed to be free from misoperation, the false start, the valve D4 is electrically started, and the mechanical selection valve D13 and the mechanical selection valve is finally, and the manual operation structure on the nitrogen injection system is eliminated.
Referring to fig. 2, the fire extinguishing logic control program for the internal and external fire of the after-fire is as follows: a transformer fire happens, an infrared and ultraviolet dual-band fire detector A2 acts, a transformer fire alarm linkage controller 1 and a field acousto-optic alarm box A3 send out alarm signals, a device 2 working procedure for preventing maloperation and refusing operation and starting a signal monitoring device is started, a transformer fire part temperature value and a fire detection image are displayed, the fire part is manually or automatically positioned, the wind speed and the rain value of a transformer field are displayed simultaneously, three-side circuit breaker tripping signals of a main transformer are displayed, the wind speed and the rain value are met simultaneously after the fire is positioned, the starting conditions of the three-side circuit breaker signals are met simultaneously, and an internal and external fire extinguishing control procedure A6 of a reburning fire is started; after the fire is positioned, the starting conditions of wind speed, rainfall and three-side breaker tripping signals cannot be met simultaneously, after a short time, repeated monitoring is carried out, the starting conditions are met, after a reignition fire internal and external fire extinguishing control program A6 is started, an external fire manual fire automatic start local or overall fire position fire extinguishing system spray head is used for fire extinguishing and a pipe network is swept, after a fire is extinguished once, an oil-discharging nitrogen-injecting fire extinguishing system is directly started to carry out internal reignition fire extinguishing in an automatic mode, after the transformer fire extinguishing is judged to be favorable in a manual mode, the oil-discharging nitrogen-injecting system is started to extinguish the fire, a fire extinguishing completion system is reset once, fire extinguishing information is printed, if the reignition fire occurs, the fire alarm, fire positioning, starting condition judgment, starting of the fire extinguishing program and resetting of the fire extinguishing system are repeated, and the control overall process of printing fire extinguishing information is used for reignition fire extinguishing, until the fire extinguishing is finished, if the reignition fire is not generated, the fire extinguishing is finished directly;
referring to fig. 2, in the post-fire-extinguishing logic control program, when the starting conditions of wind speed rainfall and three-side breaker trip-out signals cannot be met simultaneously after long-time fire positioning, an oil-discharging nitrogen-injecting fire-extinguishing system in the post-fire internal and external fire-extinguishing control program A6 is started to carry out internal fire post-fire extinguishment in advance;
referring to fig. 2, the transformer reignition fire internal and external fire alarm and linkage control system of the invention can also control a transformer water spray-oil discharge nitrogen injection fire extinguishing system or a transformer foam spray-oil discharge nitrogen injection fire extinguishing system, and according to the fire extinguishing test result, the fire extinguishing time of each time of water spray or foam spray is controlled to be about 6 minutes.
Claims (6)
1. A transformer re-ignition internal and external fire alarm and linkage control system is characterized by comprising a re-ignition internal and external fire alarm controller (1), a false action prevention and refusal fire position positioning and logic starting signal monitoring device (2), a dry powder fire extinguishing system re-ignition fire extinguishing assembly (3), an oil discharge and nitrogen injection fire extinguishing system false action prevention assembly (4) and an alternating current/direct current power supply (5); wherein:
the composite fire internal and external fire alarm controller (1) consists of a junction box (A1) connected to the composite fire internal and external fire alarm controller (1), an infrared and ultraviolet dual-band fire detector (A2) connected with a power line through an alarm line, a fire scene audible and visual alarm (A3), a manual alarm button (A4) with a telephone jack, and a programmable composite fire internal and external fire extinguishing control program (A6) of an alarm control system;
the device for monitoring the false-action and rejection-prevention fire position location and the logic starting signal (2) consists of an RS232/CAN bus converter (B1) connected with an internal and external fire alarm controller (1) of the re-ignition fire, an analog signal line (B10) connected with the device for monitoring the false-action and rejection-prevention fire position location and the logic starting signal (2), an infrared thermometer (B7) connected with the analog signal line (B10), an air speed sensor (B8), a rainfall sensor (B9), a network cable (B5) connected with the device for monitoring the false-action and rejection-prevention fire position location and the logic starting signal (2), a network switch (B2), an optical fiber (B6) connected with the network switch (B2), a special equipment box (B3) connected with the optical fiber (B6), a network cable (B5) connected with the special equipment box (B3), an image type fire detector (B4) connected with the network cable (B5), a three sides connected with the device for monitoring the false-action and the logical starting signal (B11) of a tripping and a circuit breaker (2);
the composite fire extinguishing assembly (3) of the dry powder extinguishing system is composed of a dry powder extinguishing system convergence control box (C1), a dry powder extinguishing starting gas cylinder (C2) connected to the dry powder extinguishing system convergence control box (C1), a dry powder extinguishing driving gas cylinder (C3) connected with the dry powder extinguishing starting gas cylinder (C2), the dry powder extinguishing driving gas cylinder (C3) is connected with an inlet of a dry powder tank (C4), an outlet of the dry powder tank (C4) is connected with a dry powder main pipe (C5), the dry powder main pipe (C5) is connected with a plurality of dry powder partition selection valves (C6), the dry powder partition selection valves (C6) are connected with dry powder branch pipes (C7), the dry powder branch pipes (C7) are connected with a dry powder nozzle control valve (C8) and a dry powder nozzle (C9), the dry powder extinguishing system convergence control box (C1) is connected with a field extinguishing control cabinet (A5) through control lines, the internal and external powder partition selection valves (C6) and the dry powder nozzle control valve (C8) are connected with the composite fire extinguishing system convergence control box (C1), the composite fire alarm control cabinet (A5) is connected with the composite fire alarm control cabinet (A1) for fire alarm control, and the composite fire alarm control cabinet (1) for fire alarm; the dry powder main pipe is additionally connected with a pipe network purging starting gas cylinder (C10), a pipe network purging gas cylinder (C11) and a pipe network purging control valve (C12), and the purging gas cylinder is started to purge the dry powder pipe network (C5) after each spraying fire extinguishing is finished;
the oil discharge and nitrogen injection fire extinguishing system misoperation prevention assembly (4) is composed of an oil discharge and nitrogen injection system convergence control box (D1), an oil discharge heavy hammer mechanism (D2), an oil discharge maintenance valve (D3) and an oil discharge and nitrogen injection interlocking valve (D12) which are opened by the oil discharge heavy hammer mechanism (D2), an oil discharge pipe (D5) of the oil discharge maintenance valve (D3) connected with a transformer, a transformer oil discharge valve (D7) on the oil discharge pipe (D5) close to the side of the transformer, an oil discharge valve (D6), an misoperation prevention oil discharge selection valve (D4) for partition protection, a nitrogen injection heavy hammer mechanism (D10), a nitrogen injection valve (D11) opened by delaying the nitrogen injection heavy hammer mechanism (D10), a nitrogen injection starting gas cylinder (D8) respectively connected by the nitrogen injection pipe (D15), a nitrogen injection fire extinguishing gas cylinder (D9), a misoperation prevention nitrogen injection selection valve (D13), a throttle valve (D14) and a nitrogen injection maintenance valve (D16).
2. The transformer re-ignition internal and external fire alarm and linkage control system according to claim 1, wherein the re-ignition internal and external fire alarm controller (1) in the transformer re-ignition internal and external fire alarm and linkage fire-extinguishing control system is provided with transformer non-contact infrared ultraviolet dual-waveband fire detectors (A2) arranged at the high positions of the transformer fire-extinguishing system pipe network or the outlet framework on both sides of the transformer in a diagonal or linear arrangement manner.
3. The transformer re-ignition internal and external fire alarm and linkage control system according to claim 1, characterized in that a false-operation-prevention and false-operation-rejection fire position positioning and logic start signal monitoring device (2) in the transformer re-ignition internal and external fire alarm and linkage fire extinguishing control system is provided, wherein an infrared temperature indicator (B7) is arranged on a fire explosion-proof device of a transformer fire extinguishing system pipe network, and is opposite to fire positions of sleeve flanges and voltage regulating switch flanges of a transformer, and image type fire detectors (B4) are arranged on two sides of the transformer and can monitor panoramic fire positions of the transformer, and the two can provide accurate fire position positioning information by displaying different temperature values and fire images on different sides of the fire position and the non-fire position; the system is characterized in that an air speed sensor (B8), a rainfall sensor (B9) and a tripping logic starting signal switch (B11) of a three-side breaker of the transformer are arranged, and wind speed and rainfall influence data of a fire scene of the transformer and a tripping power-off signal of the breaker of the transformer are provided in real time by combining with a fire image.
4. The transformer reignition internal and external fire alarm and linkage control system according to claim 1, characterized in that the number of reignition fire extinguishment times of the reignition fire extinguishing assembly (3) of the dry powder fire extinguishing system in the transformer reignition internal and external fire alarm and linkage fire extinguishing control system can be at least 4 times for a local half or overall fire of the transformer; for most local one-third or one-fourth external fire, the fire can be extinguished for 12 to 16 times at least; wherein, a dry powder spray head control valve (C8) is arranged in front of the dry powder spray head (C9), and the dry powder spray head control valve (C8) and the dry powder spray head (C9) at the corresponding positions are opened in linkage to the fire position positioned by the infrared temperature indicator (B7) through the control of the internal and external fire extinguishing control program (A6) of the reignition fire.
5. The transformer re-ignition internal and external fire alarm and linkage control system according to claim 1, characterized in that the oil discharge and nitrogen injection fire extinguishing system malfunction prevention component (4) is arranged next to the dry powder fire extinguishing system re-ignition fire extinguishing component (3), the alarm and fire extinguishing of the dry powder and nitrogen injection fire extinguishing systems share the re-ignition internal and external fire alarm control system (1), the malfunction prevention and malfunction prevention fire location and logic start signal monitoring device (2) prevents the malfunction of electrical control and detector cause in the malfunction case of the oil discharge and nitrogen injection system malfunction; a tripping logic starting signal switch (B11) of a three-side breaker of the transformer is arranged, and a pressure eliminating and gas relay is used as a starting logic signal of the fire extinguishing system to prevent the oil discharging and nitrogen injecting fire extinguishing system from being refused due to the fact that the starting logic signal of the fire extinguishing system does not act actually; the fire temperature and the image are adopted to position the fire part, so that the requirements of fire extinguishing control telecontrol and field control fire extinguishing action reliability are met, and the maloperation that the fire is started first in the control aspect of the conventional oil-discharging nitrogen-injecting fire extinguishing system is eliminated; the oil discharge heavy hammer mechanism (D2), the nitrogen injection heavy hammer mechanism (D10), the oil discharge and nitrogen injection interlocking valve (D12), the anti-misoperation oil discharge selection valve (D4) and the anti-misoperation nitrogen injection selection valve (D13) are respectively adopted, and the mechanical and manual operation misoperation of the system is eliminated.
6. The transformer reignition fire internal and external fire alarm and linkage control system according to claim 1, wherein the system can also control a transformer water spray-oil discharge nitrogen injection fire extinguishing system or a transformer foam spray-oil discharge nitrogen injection fire extinguishing system, and the time for extinguishing fire by water spray or foam spray is controlled to be 6 minutes each time according to the fire extinguishing test result.
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| CN201810238381.5A CN108281894B (en) | 2018-03-22 | 2018-03-22 | Transformer reignition fire internal and external fire alarm and linkage control system |
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| CN201810238381.5A CN108281894B (en) | 2018-03-22 | 2018-03-22 | Transformer reignition fire internal and external fire alarm and linkage control system |
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| CN108281894B true CN108281894B (en) | 2023-04-14 |
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| CN110624194B (en) * | 2019-07-15 | 2021-03-19 | 国网浙江省电力有限公司嘉兴供电公司 | Intelligent fire extinguishing control method for transformer substation based on ubiquitous power Internet of things |
| CN111001115A (en) * | 2019-12-09 | 2020-04-14 | 国网宁夏电力有限公司 | Fire protection judgment method and system for fire-fighting linkage transformer |
| CN111729222A (en) * | 2020-06-18 | 2020-10-02 | 速博达(深圳)自动化有限公司 | Explosion-proof fire extinguishing device |
| CN112023302A (en) * | 2020-09-09 | 2020-12-04 | 中国电力科学研究院有限公司 | Fire fighting system for three-station-in-one comprehensive station and fire fighting method thereof |
| CN112870617A (en) * | 2021-01-25 | 2021-06-01 | 南京南瑞继保电气有限公司 | Linkage control method for compressed air foam system |
| CN113101571A (en) * | 2021-05-12 | 2021-07-13 | 悟空智能科技常州有限公司 | Dry powder fire extinguishing control system for intelligent robot |
| CN115154967B (en) * | 2022-06-23 | 2023-06-20 | 国网安徽省电力有限公司电力科学研究院 | Test platform and test method for extinguishing transformer oil fire by combining dry powder and water spray |
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