CN217311693U

CN217311693U - Transformer explosion fire hazard dry powder-nitrogen injection fire extinguishing combined independent fire fighting system

Info

Publication number: CN217311693U
Application number: CN202122996081.3U
Authority: CN
Inventors: 梁戈
Original assignee: China Energy Construction Group Yunnan Electric Power Design Institute Co ltd
Current assignee: China Energy Construction Group Yunnan Electric Power Design Institute Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-08-30
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses an independent fire extinguishing system of transformer explosion conflagration dry powder-notes nitrogen ally oneself with of putting out a fire, the system is by sleeve pipe lift seat explosion-proof equipment (1), fire extinguishing system pipe network explosion-proof equipment (2), keep off oil drain assembly (3), dry powder-notes nitrogen fire extinguishing allies oneself with system (4) and takes multiple control module's dry powder-notes nitrogen to put out a fire allies oneself with and unites independent fire control fire alarm coordinated control ware (5) to constitute. The utility model is suitable for an independent fire control of transformer conflagration in arid lack of water, the long-term frozen area in winter has solved the useless extravagant national investment of putting out a fire of current fire extinguishing system, and a large amount of water oil mixture flows into the outer serious environmental pollution scheduling problem that causes around the transformer substation of the drainage system of large-traffic river system fire gun after putting out a fire and arranges. The utility model discloses social, economic benefits and environmental benefit are outstanding, and application prospect is wide.

Description

Transformer explosion fire hazard dry powder-nitrogen injection fire extinguishing combined independent fire fighting system

Technical Field

The utility model belongs to the technical field of fire-fighting equipment, especially, oil-immersed power transformer fire extinguishing systems, concretely relates to transformer explosion conflagration dry powder-nitrogen injection allies oneself with independent fire extinguishing systems that puts out a fire.

Background

Through the research and analysis of fire case and fire extinguishing test, the water spray, foam spray, dry powder, oil extraction and nitrogen injection fire extinguishing devices used by the large-scale domestic oil-immersed power transformer at present do not have the fire extinguishing capability of independently extinguishing fire inside and outside the transformer, shielding fire and reigniting fire, and the reasons for independently extinguishing the fire mainly include the following:

1) a pipe network explosion-proof device is not arranged, and the fire extinguishing pipe network is damaged and fails by the explosion part of the transformer;

2) the conventional transformer water spray, foam and dry powder fire extinguishing system is characterized in that the application parameters of the fire extinguishing system such as the continuous fire extinguishing time, the fire extinguishing intensity and the like summarized from a transformer oil pan fire test are compared with the fire extinguishing intensity of 80-100L/S of 5-6 fire guns at the fire position of a fire extinguishing case, and the water spray, the foam and the like are only 0.33L/s.m. ² The fire extinguishing intensity is hundreds of times different, and the fire extinguishing capability of the transformer can only extinguish the secondary fire with small oil quantity outside the transformer; the dry powder extinguishing agent has high extinguishing efficiency, but the chemical reaction and cooling effect of the dry powder extinguishing agent and combustible substances are relatively limited, the dry powder extinguishing agent can only momentarily suppress fire behavior, the extinguishing agent is consumed completely along with the chemical reaction of the dry powder extinguishing agent and the combustible substances of the high-temperature transformer oil, meanwhile, the combustible explosive gas formed by the decomposition of the high-temperature transformer oil flushes a dry powder covering layer, the high-temperature transformer oil can be re-combusted again when meeting air, and the dry powder extinguishing system still cannot extinguish the transformer re-combustion fire, so that the extinguishing capacity of the dry powder extinguishing system can only extinguish the secondary fire with small oil quantity outside the transformer;

3) a severe explosion fire of a side bushing transformer usually forms a transformer external main body fire which occupies 80% of the total oil quantity of the transformer (about 30/140 tons of transformer oil for single phase change/three phase change respectively) and flows and spreads in a large area, and a transformer internal main body fire which occupies 20% of the total oil quantity in a transformer oil tank (about 10/30 tons of transformer oil fire for single phase change/three phase change respectively), and as mentioned above, the conventional transformer fire-extinguishing system for fire cannot extinguish the fire;

4) the transformer explosion fire of the top surface casing pipe usually forms a main body fire inside a transformer oil tank accounting for 95% of the total oil mass of the transformer and a secondary fire outside the transformer oil tank accounting for 5% of the total oil mass of the transformer, the conventional transformer fire extinguishing system shields the secondary fire outside the bottom of the transformer by a radiator outside the transformer or is not provided with a fire extinguishing nozzle, the fire extinguishing capability is lost, meanwhile, the conventional water spraying and foam fire extinguishing system is easy to evaporate by a high-temperature fire field due to small fire extinguishing agent particles, the fire extinguishing agent cannot contact with the fire surface and cannot extinguish the fire for inside and outside fire, fire is shielded and reignited inside and outside the transformer connected with high-temperature high-oil-pressure high-flame at the explosion part of the external top casing pipe or side casing pipe; the dry powder fire extinguishing system can only suppress the fire briefly, the fire extinguishing agent is consumed completely along with the chemical reaction of the dry powder fire extinguishing agent and the combustible substance of the high-temperature transformer oil, meanwhile, the dry powder covering layer is flushed away along with the combustible explosive gas formed by the decomposition of the high-temperature transformer oil, the high-temperature transformer oil can be re-combusted when meeting air, and the dry powder fire extinguishing system still cannot suppress the transformer re-combustion fire; in addition, the conventional fire extinguishing system cannot extinguish high-temperature, high-oil-pressure and high-flame fire, and also cannot extinguish the fire, namely the fire inside and outside, of the transformer radiator and the oil tank because the fire extinguishing agent is shielded by the radiator and the oil tank and the external fire extinguishing agent cannot contact with the radiator and the oil tank to shield the fire;

5) the side sleeve transformer oil splashing and flowing spreading range exceeds the protection range of a transformer fire extinguishing system, and the fire extinguishing system can also be caused to lose efficacy;

6) the transformer explosion fire generally refers to the situation that the radius of the periphery of the explosion position of a sleeve lifting seat is 2m, the bottom of a transformer oil tank flows and spreads the fire, the surface of other transformers is not provided with the fire, the conventional fire extinguishing system has the common fault that no matter the fire position is arranged in the fire extinguishing system, the bottom of the outer side of the transformer oil tank with the fire is not provided with a fire extinguishing nozzle, a heat radiator without the fire and the positions without the fire outside of other oil tanks are all sprayed and extinguished blindly, too much fire extinguishing agent is wasted, and the fire extinguishing difficulty is increased artificially;

7) the conventional fire extinguishing system does not consider the importance of influence of external environmental factors such as wind speed, rainfall and the like: the fire extinguishing agent of the national standard dry powder fire extinguishing system has the duration of extinguishing fire for only 60 seconds, if the strong wind and heavy rain lasts for 5 minutes and 10 minutes, and how do the spraying dry powder extinguish fire when the strong wind and heavy rain are in time? This is a fatal defect of the dry powder system; the national standard water spray fire extinguishing agent lasts for 24 minutes, the foam spray fire extinguishing agent lasts for 15 minutes, and if the foam is sprayed for 15 minutes, the fire is extinguished in 10 minutes in heavy rain? This is also an important drawback of the foam system; the same principle is adopted for water spraying, and if heavy rain is caused in 10 minutes and strong wind is caused in 5-6 minutes, fire cannot be extinguished within 24 minutes after the extinguishing agent is sprayed; the scheme that the fire extinguishing system is required to independently extinguish fire, the wind and rain environment monitoring is adopted, and the fire extinguishing system is stopped by heavy wind and heavy rain, so that the problem of failure of the fire extinguishing system by heavy wind and heavy rain is very necessary;

8) tests prove that the oil-discharging and nitrogen-injecting fire extinguishing device for 4 tons of transformer oil in the transformer oil tank can extinguish fire in 10 seconds, the large-scale transformer oil has more than 100 tons of transformer oil in fire, the oil-discharging and nitrogen-injecting fire extinguishing device injects nitrogen in 10 minutes, a nitrogen fire extinguishing agent is fully contacted with the transformer oil in a game, stirring and cooling are continuously carried out from bottom to top, and a nitrogen layer covering fire extinguishing is formed at the top of the transformer oil tank for more than 30 minutes, so that the oil-discharging and nitrogen-injecting fire extinguishing device is the best fire extinguishing system for the main body fire in the transformer at present; however, because the system has many problems of misoperation and refusal, the oil-discharging nitrogen-injecting fire extinguishing device is not favored by power grid companies, and the oil-discharging nitrogen-injecting fire extinguishing device is only used in a large quantity in many arid water-deficient winter long-term freezing areas in China, and the environment conditions cannot use a water spray and foam spray system.

9) The transformer explosion fire possibly causes the oil fire of the splashing transformer with the fire wall separating the adjacent transformers, the national standard transformer fire extinguishing system can only extinguish fire for 1 explosion fire transformer, and the oil fire extinguishment of the splashing transformer of the adjacent transformer cannot be considered;

10) it is a common practice of grid companies to separately install water spray or foam spray or dry powder or oil discharge nitrogen injection fire extinguishing devices according to national standards, as described above, because the fire extinguishing capability of the fire extinguishing systems is greatly different from that of transformer fires, the single water spray or foam spray or dry powder or oil discharge nitrogen injection fire extinguishing systems independently arranged in national standards cannot independently extinguish the transformer explosion fires, a fire brigade usually needs to adopt a large-flow water-based fire gun to suppress and extinguish the fire, and the water-based fire gun extinguishing agent cools and extinguishes the fire while continuously generating oil-water boiling deflagration with high-temperature transformer oil, due to poor effects of oil tank shielding and high-temperature cooling, the fire extinguishing agent has poor cooling effect, long fire extinguishing time, large fire-fighting water consumption and more formed oil-water mixture, and the oil-water mixture flows into a drainage system of a transformer substation and is discharged outside, so that serious toxic oil-water mixture pollution is formed;

therefore, under the condition that the fire accidents of the transformer caused by the aging and the loss of the power equipment are obviously increased, the development of an effective independent fire-fighting system for the explosion fire of the transformer is necessary.

Disclosure of Invention

Based on the defects of the prior art, the utility model provides a transformer explosion fire hazard dry powder-nitrogen injection fire extinguishing combined independent fire fighting system, which is particularly suitable for independent fire fighting of transformer fire hazard in severe arid water shortage and long-term freezing areas.

The utility model discloses a research process does: the existing fire-fighting system has problems and is characterized by being created by the transformer main body and secondary fire hazard influence analysis, the transformer fire-fighting system fire-fighting intensity and fire hazard intensity matching theory, the transformer explodes and flows to cause fire hazard, spreads fire hazard, shields fire hazard, internal and external fire hazard, reburning fire hazard, high-temperature high-oil-pressure high-flame fire hazard fire-fighting analysis, the transformer oil-blocking and oil-discharging device is created, the transformer fire-fighting system pipe network explosion-proof device is created, the transformer explodes and fires independent fire-fighting system is created, fire hazard part alarm positioning fixed-point fire fighting is performed, the external environment monitoring device, fire-fighting pipe network fire part spray fire-fighting control, different fire hazard part fire-fighting control modules, a plurality of transformer short-time spray fire-fighting modules are created, the nitrogen injection fire-fighting system is prevented from being mistakenly moved and created, the fire-fighting test is carried out, and the utility model is improved, meets the independent fire extinguishing requirement of explosion fire.

Principal and secondary fire theory:

1) suppose that: defining a fire with large transformer fire oil quantity and high temperature as a main fire, and defining a fire with small transformer fire oil quantity and low temperature as a secondary fire;

2) the conventional transformer water spray, foam and dry powder fire extinguishing system is characterized in that the application parameters of the fire extinguishing system such as continuous fire extinguishing time, fire extinguishing intensity and the like summarized from transformer oil pan fire tests are 0.33L/s.m. m of the water spray and foam fire extinguishing system compared with the fire extinguishing intensity of 80-100L/s of 5-6 fire guns at the fire position of the explosion of a fire extinguishing case ² The fire extinguishing intensity of the fire-fighting gun is hundreds of times different from that of the fire-fighting gun, and the fire extinguishing capability of the fire-fighting gun can only extinguish the secondary fire with small oil mass outside the transformer; the dry powder extinguishing agent has high extinguishing efficiency, but the chemical reaction and cooling effect of the dry powder extinguishing agent and combustible substances are relatively limited, the dry powder extinguishing agent can only momentarily suppress fire, the extinguishing agent is consumed completely along with the chemical reaction of the dry powder extinguishing agent and the combustible substances of the high-temperature transformer oil, meanwhile, the dry powder covering layer is flushed along with combustible explosive gas formed by decomposition of the high-temperature transformer oil, the high-temperature transformer oil can be re-combusted again when meeting air, and the dry powder extinguishing system still cannot extinguish the transformer re-combustion fire, so that the extinguishing capacity of the dry powder extinguishing system can only extinguish the secondary fire with small oil quantity outside the transformer;

3) a severe explosion fire of a side bushing transformer usually forms a transformer external main body fire which occupies 80% of the total oil quantity of the transformer (about 30 tons/140 tons of transformer oil respectively in single phase change/three phase change) and flows and spreads in a large area, and a transformer internal main body fire which occupies 20% of the total oil quantity in a transformer oil tank (about 10 tons/30 tons of transformer oil fire respectively in single phase change/three phase change), and the conventional transformer fire extinguishing system of the fire cannot extinguish the fire as described above;

4) the transformer explosion fire of the top surface casing pipe usually forms a main body fire inside a transformer oil tank accounting for 95% of the total oil mass of the transformer and a secondary fire outside the transformer oil tank accounting for 5% of the total oil mass of the transformer, the conventional transformer fire extinguishing system shields the secondary fire outside the bottom of the transformer by a radiator outside the transformer or is not provided with a fire extinguishing nozzle, the fire extinguishing capability is lost, meanwhile, the conventional water spraying and foam fire extinguishing system is easy to evaporate by a high-temperature fire field due to small fire extinguishing agent particles, the fire extinguishing agent cannot contact with the fire surface and cannot extinguish the fire for inside and outside fire, fire is shielded and reignited inside and outside the transformer connected with high-temperature high-oil-pressure high-flame at the explosion part of the external top casing pipe or side casing pipe; the dry powder fire extinguishing system can only suppress the fire for a short time, the dry powder fire extinguishing agent is consumed completely along with the chemical reaction of the dry powder fire extinguishing agent and the combustible substance of the high-temperature transformer oil, meanwhile, the dry powder covering layer is flushed away along with the combustible explosive gas formed by the decomposition of the high-temperature transformer oil, the high-temperature transformer oil can be re-combusted again when meeting air, and the dry powder fire extinguishing system can not extinguish the internal and external fire, the shielding fire and the re-combustion fire inside and outside the transformer with high temperature, high oil pressure and high flame at the explosion part of the external top sleeve or the side sleeve; in addition, except that the dry powder fire extinguishing system basically has fire-blocking capability for extinguishing the radiator and the oil tank of the transformer through spray head improvement and fire-extinguishing verification tests, the conventional water spray and foam spray fire extinguishing system cannot contact the radiator and the oil tank to block fire, nor can the fire-blocking capability for extinguishing the radiator and the oil tank of the transformer and internal and external fire because the fire extinguishing agent is blocked by the radiator and the oil tank;

5) tests and fire extinguishing cases show that: (1) no external fire extinguishing system except the fire gun can extinguish main body fire in the oil tank; (2) the oil-discharging and nitrogen-injecting fire extinguishing system discharges oil from the upper part of a transformer oil tank, the nitrogen-injecting fire extinguishing agent at the lower part of the oil tank is fully contacted with transformer oil, cold oil, hot oil and the nitrogen fire extinguishing agent are fully stirred and cooled, 4 tons of main body fire disasters in the transformer oil tank can be extinguished after nitrogen injection in 20 seconds of test, nitrogen is injected in 10 minutes by the oil-discharging and nitrogen-injecting fire extinguishing system, the nitrogen fire extinguishing agent continuously covers the surface of the transformer oil for more than 30 minutes for cooling and fire extinguishing, the system is not influenced by environmental conditions such as outdoor wind speed, rainfall and the like, and the oil-discharging and nitrogen-injecting fire extinguishing system has incomparable advantages for extinguishing the main body fire disasters with large oil quantity and high temperature in the oil tank in the transformer compared with other transformer fire extinguishing systems, but cannot extinguish the fire disasters outside the transformer; (3) distinguish transformer main part and secondary fire, it just can to say that if set up the inside main part conflagration of oil extraction nitrogen injection fire extinguishing systems suppression transformer, transformer oil such as outside little oil mass secondary fire oneself burns out just self-extinguishing, and outside fire extinguishing systems's effect lies in: when the inside cooling of oil extraction nitrogen injection fire extinguishing systems transformer tank is put out a fire, the secondary conflagration of outside little oil mass splash trickling transformer oil constantly heats the transformer tank outside the oil tank, plays the reaction of drawing the inside transformer oil of fuel tank even, and outside and inside fire extinguishing systems complement each other, just can possibly put out a fire to the transformer.

6) The fire case shows that the national standard transformer fire extinguishing system is destroyed by transformer explosion parts and loses efficacy, the transformer explosion fire range exceeds the fire extinguishing system protection range and loses efficacy, the transformer fire extinguishing system loses efficacy in outdoor wind and rain environments, the fire extinguishing capacity of the transformer fire extinguishing system is not matched with the intensity of transformer fires, the transformer fire extinguishing system is arranged at a position not matched with a fire position, the national standard transformer fire extinguishing system cannot extinguish a transformer to block fire, internal and external fire, reignition fire and heating fire at the bottom of the outer side of a transformer oil tank, and the six reasons are the most main reasons that the conventional transformer fire extinguishing system cannot independently extinguish the transformer explosion fire.

The utility model discloses a realize through following technical scheme.

The transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire fighting system is composed of a sleeve lifting seat explosion-proof device, a fire extinguishing system pipe network explosion-proof device, an oil blocking and discharging device, a dry powder-nitrogen injection fire extinguishing combined system and a dry powder-nitrogen injection fire extinguishing combined independent fire fighting fire alarm linkage controller with various control modules;

the sleeve lifting seat explosion-proof device comprises a side sleeve lifting seat explosion-proof device and a top sleeve lifting seat explosion-proof device, wherein the side sleeve lifting seat explosion-proof device consists of explosion-proof upright posts, explosion-proof cross beams fixed between the explosion-proof upright posts, explosion-proof cross beam pillars arranged between the explosion-proof cross beams, a lifting seat explosion-proof clamping connecting rod fixed on the explosion-proof upright posts, a lifting seat explosion-proof clamping transverse shoulder fixed on the lifting seat explosion-proof clamping connecting rod, a lifting seat explosion-proof clamping pressing arm fixed on the lifting seat explosion-proof clamping transverse shoulder and a lifting seat explosion-proof annular arm fixed on the explosion-proof upright posts through a lifting seat explosion-proof annular arm connecting rod; the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm, a lifting seat explosion-proof left ring arm and a lifting seat explosion-proof left and right ring arm connecting plate; an explosion-proof upright post, an explosion-proof ring arm connecting rod of the lifting seat, an explosion-proof right ring arm of the lifting seat, an explosion-proof left ring arm of the lifting seat and an explosion-proof left and right ring arm connecting plate of the lifting seat in the side sleeve explosion-proof device are reinforced by adopting double explosion-proof upright post materials; the top surface sleeve lifting seat explosion-proof device and the side surface sleeve lifting seat explosion-proof device have the same components and structures, and are composed of explosion-proof upright posts, explosion-proof cross beams fixed among the explosion-proof upright posts, explosion-proof cross beam supporting columns arranged among the explosion-proof cross beams, lifting seat explosion-proof clamping connecting rods fixed on the explosion-proof upright posts, lifting seat explosion-proof clamping transverse shoulders fixed on the lifting seat explosion-proof clamping connecting rods, lifting seat explosion-proof clamping pressure arms fixed on the lifting seat explosion-proof clamping transverse shoulders and lifting seat explosion-proof ring arms fixed on the explosion-proof upright posts through lifting seat explosion-proof ring arm connecting rods; the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm, a lifting seat explosion-proof left ring arm and a lifting seat explosion-proof left and right ring arm connecting plate; a rising seat explosion-proof clamp connecting rod, a rising seat explosion-proof clamp transverse shoulder, a rising seat explosion-proof clamping arm, a rising seat explosion-proof ring arm connecting rod, a rising seat explosion-proof right ring arm, a rising seat explosion-proof left ring arm and a rising seat explosion-proof left and right ring arm connecting plate in the top surface sleeve rising seat explosion-proof device are reinforced by double explosion-proof upright column materials;

fire extinguishing systems pipe network explosion-proof equipment includes side sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment and top sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment, wherein: the pipe network explosion-proof device of the side surface sleeve explosion fire-extinguishing system and the pipe network explosion-proof device of the top surface sleeve explosion fire-extinguishing system are respectively composed of a long upright post, an explosion-proof beam fixed on the long upright post, an explosion-proof support arranged between the explosion-proof beams and an explosion-proof steel mesh component arranged between the explosion-proof beam and the explosion-proof support;

the oil blocking and discharging device consists of a vertical movable fireproof oil blocking plate, an inclined movable fireproof oil blocking plate, a movable inspection door, a transformer explosion fire protection device, an accident oil pool, an oil discharging ramp, an oil discharging hole and an oil discharging well; wherein: the vertical movable fireproof oil baffle plate consists of an oil baffle base, an embedded part embedded in the oil baffle base, a stand column connected with the embedded part, a bottom cross beam connected with the stand column, a top cross beam connected with the stand column and a fireproof oil baffle plate fixed among the bottom cross beam, the stand column and the top cross beam; the inclined movable fireproof oil baffle assembly consists of an inclined short cantilever beam fixed with the top cross beam by adopting a bolt and a bayonet and a fireproof oil baffle plate fixed between the top cross beam and the inclined short cantilever beam; the movable inspection door assembly consists of a door seam sealing buckle welded on the upright post, a door hinge, a door frame, a fireproof oil baffle plate fixed on the door frame and a door lock, and the transformer explosion fire protection adopts a transformer fireproof wall; the emergency oil pool adopts a transformer emergency oil pool, and an oil discharge ramp is arranged between the emergency oil pool and the vertically movable fireproof oil baffle plate; the transformer oil flows into an oil discharge hole in the wall of the accident oil pool through an oil discharge ramp and flows into the accident oil pool, pebbles are covered on the accident oil pool, the oil discharge ramp is arranged at the bottom of the accident oil pool, an oil discharge well is arranged at the same time, the discharged transformer oil is converged into the oil discharge well and then is connected into a main accident oil pool through an oil discharge pipeline;

the dry powder-nitrogen injection fire extinguishing combined system consists of a fire position alarm positioning device, an external environment monitoring device, a dry powder fire extinguishing pipe network capable of controlling the fire position to spray and extinguish fire, a set of dry powder fire extinguishing device and a novel oil discharge and nitrogen injection fire extinguishing device; the fire position alarming and positioning device consists of a non-contact fire detector, a non-contact electrical fire temperature positioning detector arranged corresponding to a fire position and a transformer fire image monitoring probe arranged obliquely above a protected transformer, and is connected with the dry powder-nitrogen injection combined system fire alarming linkage controller; the external environment monitoring device consists of a wind speed/rainfall monitor, a transformer power-off signal and a transformer fire image monitoring probe, and is connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller; the dry powder fire extinguishing pipe network consists of a main fire extinguishing pipe, a partition selection valve, a fire extinguishing distribution pipe, an electric injection control valve, a fixed or movable fire extinguishing branch pipe, a manual injection control valve and a dry powder nozzle, wherein the main fire extinguishing pipe is connected with an outlet of a set of dry powder fire extinguishing device; the complete set of dry powder fire extinguishing device consists of an equipment room, a dry powder starting gas cylinder, a dry powder driving cylinder group and a dry powder mixing tank, wherein the dry powder starting gas cylinder, the dry powder driving cylinder group and the dry powder mixing tank are arranged in the equipment room; the complete set of dry powder extinguishing device needs to have the secondary fire extinguishing capability outside the transformer oil tank for more than 4 times; the arrangement of the nozzles of the dry powder fire extinguishing pipe network needs to pass a verification test of a transformer or a high-voltage reactor fixed fire extinguishing system, and blind areas for shielding fire or fire parts with large influence of wind speed are added with additional nozzles for shielding wind and rain;

the fire position alarming and positioning device consists of a non-contact fire detector, a non-contact electrical fire temperature detector arranged corresponding to a fire position and a transformer fire image monitoring probe 3 arranged obliquely above a protected transformer, wherein related signals are connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarming linkage controller through signal lines; when in fire, the non-contact point type fire infrared detector repeatedly alarms and resets the initial fire and the reburning fire; the non-contact electrical fire temperature detector monitors that the temperature of the explosion part of the transformer bushing lifting seat exceeds 600-700 ℃ and the transformer fire image monitoring probe detects a fire image to confirm the fire part; when a large-area fire disaster occurs, multipoint overtemperature and fire disaster images are combined to control all or most of the corresponding fire extinguishing pipe networks to open the injection control valves to extinguish the fire; the method comprises the following steps of (1) performing linkage control on the opening of a local injection control valve of a corresponding fire extinguishing pipe network to perform injection fire extinguishing by using a local fire single-point overtemperature + fire image; re-burning the local single-point over-temperature + fire image of the fire, and controlling the corresponding fire extinguishing pipe network local injection control valve to open the nozzle for multiple injection fire extinguishing; a radiator at the outer bottom of the transformer oil tank shields secondary fire hazards caused by flowing and heating, a shielding-proof, wind-proof and rain-proof additional spray head is arranged, an important fire hazard part priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire hazard alarm linkage controller is adopted, and an electric injection control valve of the additional spray head at the outer bottom of the transformer oil tank is linked to extinguish fire; the method comprises the following steps of exploding 1 transformer, splashing fire at the dangerous position of a sleeve lifting seat of 1-2 adjacent transformers, utilizing a fire position alarm positioning device and a fire position fixed-point fire extinguishing saved fire extinguishing agent, and extinguishing fire through an important fire position priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller; the fire part at the explosion position of the transformer bushing lifting seat is re-fired, and repeated fire alarming, resetting and repeated fire extinguishing are carried out through a short-time multiple fire extinguishing control module of the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarming linkage controller; the transformer with longer explosion splashing distance shields dead angle fire, such as secondary transformer splashing fire, transformer radiator and the like, and the fire is extinguished by adopting an important fire part priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller and a main and secondary linkage fire part pipe network electric injection control valve or by adopting a movable fire extinguishing branch pipe; the fire position alarming and positioning device is a core device for realizing fire extinguishing failure of a fire-free position, saving fire extinguishing agents, realizing repeated fire extinguishing of a fire position in a key way and realizing fire extinguishing failure of the whole transformer fire dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system.

The wind speed/rainfall monitor of the external environment monitoring device is arranged at the top of the fire extinguishing system equipment; be different from the following use of national standard fire extinguishing systems design standard restriction can only be at 2m/s wind speed, and actual outdoor environment can not satisfy national standard fire extinguishing systems service environment requirement far away, avoids starting fire extinguishing systems waste fire extinguishing agent under the strong wind and heavy rain environment, prevents that fire extinguishing systems from taking place to put out a fire inefficacy: the fire extinguishing agent of the national standard dry powder fire extinguishing system has the lasting fire extinguishing time of only 60 seconds, if the strong wind and heavy rain lasts for 5 minutes and 10 minutes, and the sprayed dry powder is ineffective in the strong wind and heavy rain, which is the fatal defect of the dry powder system; in order to prevent transformer oil flowing from the bottom of the outer side of a transformer oil tank and continuously heating transformer oil in the transformer oil tank to cause cooling and fire extinguishing failure of an oil discharge and nitrogen injection fire extinguishing system under the conditions of strong wind and heavy rain, a shielding, wind and rain preventing additional spray head D12a is arranged, an important fire part priority module of a fire alarm linkage controller is adopted, and an electric injection control valve of the additional spray head at the bottom is linked to extinguish fire; under other conditions, the external dry powder fire extinguishing system-the internal nitrogen injection fire extinguishing system can firstly utilize the nitrogen injection fire extinguishing system to extinguish the main body fire in the oil tank, and then the external dry powder fire extinguishing system is started to extinguish the external secondary fire of the transformer when heavy wind and heavy rain stop or weaken, wherein the external dry powder system has the function of preventing the secondary fire of the transformer oil sprayed from the outside from continuously heating the oil tank of the transformer while the internal oil discharge nitrogen injection fire extinguishing system is prevented from cooling and extinguishing fire, and even has the reaction of guiding the transformer oil in the oil tank; the scheme of firstly injecting nitrogen to extinguish the fire and then extinguishing the fire by dry powder in strong wind and heavy rain does not affect the whole fire extinguishing effect of the transformer and can avoid the fatal defect of the dry powder fire extinguishing system of the transformer, so that the device for monitoring the external environment is not a dispensable device for the dry powder fire extinguishing system, and is a core device for extinguishing the fire failure of the transformer fire hazard dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system.

The novel oil-discharging nitrogen-injecting fire extinguishing device comprises a nitrogen-injecting fire extinguishing cabinet, a nitrogen-injecting fire extinguishing pipeline of nitrogen-injecting fire extinguishing equipment, an automatic butt-joint locking device of the nitrogen-injecting fire extinguishing pipeline, a transformer preset nitrogen-injecting fire extinguishing pipeline, a transformer oil tank oil-discharging pipeline and a transformer oil conservator oil-discharging pipeline; wherein: the outlet of the nitrogen injection fire extinguishing cabinet is connected with a nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment, the transformer preset nitrogen injection fire extinguishing pipeline is connected with the outlet at the lower part of the transformer oil tank, and the junction of the nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment and the transformer preset nitrogen injection fire extinguishing pipeline is arranged at the position of the automatic butt-joint locking device of the nitrogen injection fire extinguishing pipeline; the transformer oil discharge pipeline is set as two independent oil discharge pipelines, namely an independent transformer oil tank oil discharge pipeline and a transformer conservator oil discharge pipeline, the transformer oil tank oil discharge pipeline is led out from the upper part of the transformer oil tank, and the tail end of the transformer oil tank oil discharge pipeline is directly connected into a transformer oil storage pool to discharge oil under pebbles; one end of a transformer conservator oil discharge pipeline is led out from a pipeline between a transformer conservator interception valve and a transformer conservator bottom valve, and the other end of the transformer conservator oil discharge pipeline is directly connected to a transformer oil storage pool for discharging oil under pebbles; the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller is arranged in a fire-fighting control room or a fire-fighting system equipment room, and is connected with fire-fighting linkage valves of a nitrogen injection fire-fighting cabinet, a nitrogen injection fire-fighting equipment nitrogen injection fire-fighting pipeline, a nitrogen injection fire-fighting pipeline automatic butt locking device, a transformer preset nitrogen injection fire-fighting pipeline, a transformer oil tank oil discharge pipeline and a transformer oil conservator oil discharge pipeline; the nitrogen injection fire extinguishing cabinet component is a nitrogen injection fire extinguishing equipment component and comprises a starting nitrogen bottle group, and the starting nitrogen bottle group is fixed in the nitrogen injection fire extinguishing cabinet by adopting a bracket; the starting bottle head valve group is fixedly arranged on the starting nitrogen bottle group; one end of the starting gas pipeline is connected with a valve outlet of the starting bottle head valve group, and the other end of the starting gas pipeline is connected with a nitrogen main gas valve fixed on the starting nitrogen bottle group; the nitrogen main pipeline is connected to the outlet of the nitrogen main air valve, and a nitrogen bottle pressure gauge, a nitrogen output pressure gauge, a nitrogen pressure reducing valve, a nitrogen charging fire extinguishing delay device, a nitrogen throttling assembly and a nitrogen output port assembly are sequentially arranged in the airflow direction; the nitrogen output port is positioned at the tail end of the main nitrogen pipeline, is arranged at the top of the nitrogen injection fire extinguishing cabinet, and is connected with a nitrogen injection fire extinguishing pipeline of external nitrogen injection fire extinguishing equipment by adopting a flange; the nitrogen injection fire extinguishing cabinet is connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller through power and control cables; the moisture-proof facility of the nitrogen injection fire-extinguishing cabinet comprises a temperature and humidity controller, a moisture-proof heater, a moisture-proof junction box and a wiring terminal block; the temperature and humidity controller is respectively connected with the moisture-proof heater, the moisture-proof junction box and the wiring terminal strip through a power supply circuit and a control circuit; the nitrogen injection fire extinguishing equipment comprises a nitrogen injection fire extinguishing main pipe, a nitrogen injection fire extinguishing pipeline compensator and a nitrogen fire extinguishing selector valve, wherein the nitrogen injection fire extinguishing main pipe, the nitrogen injection fire extinguishing pipeline compensator and the nitrogen fire extinguishing selector valve are sequentially arranged at the butt joint end of the butt joint locking device of the automatic butt joint locking device component of the nitrogen injection fire extinguishing pipeline from a nitrogen output port led out of a nitrogen injection fire extinguishing cabinet; the nitrogen injection fire extinguishing pipeline automatic butt joint locking device assembly consists of a butt joint locking device butt joint end and a butt joint locking device bearing end, and a nitrogen fire extinguishing selection valve and a transformer pre-arranged misoperation prevention electric fire extinguishing control valve of the nitrogen injection fire extinguishing pipeline assembly are respectively connected with the two ends of the nitrogen injection fire extinguishing selection valve and the transformer in the direction of nitrogen injection fire extinguishing airflow; the transformer is provided with a nitrogen injection fire extinguishing pipeline assembly, two ends of the nitrogen injection fire extinguishing pipeline assembly are respectively connected to an outlet of a butt joint locking device bearing end of the nitrogen injection fire extinguishing pipeline automatic butt joint locking device assembly and a nitrogen injection fire extinguishing pipeline interface at the lower part of a transformer oil tank, and the nitrogen injection fire extinguishing pipeline assembly is formed by sequentially connecting an anti-misoperation electric fire extinguishing control valve, a nitrogen injection fire extinguishing pipeline compensator, a nitrogen exhaust assembly, a nitrogen injection fire extinguishing distribution pipe, a nitrogen distribution assembly, a nitrogen injection fire extinguishing branch pipe and a nitrogen injection interface valve along the direction of nitrogen injection fire extinguishing airflow; one end of the transformer oil tank oil drainage pipeline assembly is connected with the upper part of the transformer oil tank, and the other end of the transformer oil tank oil drainage pipeline assembly is directly connected into the transformer oil storage pool to drain oil under pebbles; the transformer oil tank oil drainage pipeline assembly is formed by sequentially connecting an oil drainage connector valve, an oil drainage pipe exhaust assembly, an anti-misoperation oil drainage selection valve, an oil drainage valve leakage inspection port and an oil drainage pipe, wherein the oil drainage valve leakage inspection port is formed behind the oil drainage pipe; one end of the oil drain pipeline component of the transformer oil conservator is led out from the middle of a connecting pipe of the transformer oil conservator and a transformer oil tank, and the other end of the oil drain pipeline component is directly connected below pebbles in an oil storage pool of the transformer; the oil drainage pipeline assembly of the transformer oil tank is formed by sequentially connecting an oil conservator oil drainage pipeline, an oil conservator oil drainage control valve, an oil drainage pipe leakage maintenance valve and an oil drainage pipe; the position of the led-out pipeline interface is positioned between the oil conservator stop valve and the oil conservator bottom valve of the transformer;

the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller with various control modules consists of a fire alarm controller and a fire linkage controller, and is connected with fire-fighting linkage devices such as a fire position alarm positioning device, an external environment monitoring device, a set of dry powder fire extinguishing device, a partition selection valve on a dry powder fire extinguishing pipe network capable of controlling fire position to spray and extinguish fire, an electric spray control valve, an oil discharge nitrogen injection fire extinguishing device and the like; the fire extinguishing system comprises a partition selection valve, an oil discharge and nitrogen injection fire extinguishing device, a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller, an electric injection control valve, a sleeve fire alarm positioning infrared thermometer, a preset starting condition control module, a short-time multi-injection module, an important fire part priority module, a general top fire part fire extinguishing control module and a general side fire part fire extinguishing control module, wherein the partition selection valve, the oil discharge and nitrogen injection fire extinguishing device and the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller are in linkage relation, and the linkage fire extinguishing system is used for extinguishing transformer fire parts with different fire conditions.

Preferably, the sleeve lifting seat explosion-proof device is arranged near the transformer sleeve lifting seat, the number of the lifting seat explosion-proof clamping pressure arms fixed on the lifting seat explosion-proof clamping transverse shoulder is 2, and the lifting seat explosion-proof clamping pressure arms are respectively fixed at two ends of the lifting seat explosion-proof clamping transverse shoulder; the number of the lifting seat explosion-proof ring arms fixed on the explosion-proof upright post is at least one; the distance between the anti-explosion ring arm of the lifting seat and the outer wall of the sleeve lifting seat is 0.1m, the height of the anti-explosion upright post is 0.3m higher than the top of the transformer sleeve lifting seat, and the height of the anti-explosion clamping arm of the lifting seat is 0.05m higher than a flange plate at the top of the transformer sleeve lifting seat.

Preferably, the fire extinguishing system pipe network explosion-proof equipment sets up between transformer high pressure, middling pressure sleeve pipe and main transformer fire extinguishing system pipe network, is close to fire extinguishing system pipe network one side, apart from transformer 2.5 ~ 3.5m, and explosion-proof equipment height is higher than fire extinguishing system pipe network 1m, and the width exceeds sleeve pipe explosion influence scope 1.5 m.

Preferably, the oil blocking and discharging device is arranged on one side of the transformer with the side high-voltage bushing and is 2.5-3.5 m away from the edge of the side bushing; the vertical movable fireproof oil baffle plate is arranged by depending on a transformer fireproof wall; the inclined movable fireproof oil baffle plates are arranged on two sides of the side sleeve within the range of 1.8-2.2 m; the movable patrol doors are arranged on patrol lanes or fire-fighting lanes on two sides of the transformer.

The utility model changes the laggard current situation that the fire extinguishing of the transformer fire is carried out manually by fire fighting team running life danger for a long time, realizes the automatic fire extinguishing of the transformer fire without depending on the whole process of the fire fighting team, solves the problems that the national standard transformer fire extinguishing system is smashed by the transformer explosion part to be out of work, the transformer explosion fire range exceeds the fire extinguishing system protection range to be out of work, the fire extinguishing capability of the transformer fire extinguishing system is not matched with the intensity of the transformer fire, the setting part of the transformer fire extinguishing system is not matched with the fire position, the national standard transformer fire extinguishing system does not put out the measures of the transformer shielding fire, the internal and external fire, the reignition fire, the heating fire at the bottom outside of the transformer oil tank and the like, reduces the combustible by discharging a large amount of oil, coordinates the fire extinguishing coordination of the dry powder-nitrogen injection fire extinguishing system, the large-flow fire gun shortens the fire extinguishing time by more than four to five times, the fire extinguishing system reduces the environmental and air pollution in the fire extinguishing process, is particularly suitable for being used in arid areas with water shortage and long-term freezing areas in winter, and solves the problems that the prior fire extinguishing system wastes national investment due to ineffective fire extinguishing, and a large amount of oil-water mixture flows into a drainage system of a transformer substation to be discharged outside after a large amount of water-water fire guns extinguish fire, so that the environment around the transformer substation is seriously polluted, and the like. The utility model discloses social, economic benefits and environmental benefit are outstanding, and application prospect is wide.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2-1 is a schematic view of a side sleeve riser explosion vent apparatus;

FIG. 2-2 is a schematic view of the top surface sleeve elevated seat explosion vent apparatus;

FIG. 3 is a schematic view of a fire suppression system pipe network explosion protection device;

FIGS. 4-1 and 4-2 are schematic views of an oil deflector;

FIG. 5-1 is a schematic view of a dry powder-nitrogen injection fire suppression combination system;

FIG. 5-2 is a schematic view of a fire location controlled spray fire suppression piping network;

FIG. 6 is a schematic view of a fire location alarm locating and external environment monitoring device

FIG. 7 is a schematic diagram of a typical top sleeve fire location extinguishing;

FIG. 8 is a schematic view of a general side sleeve fire location extinguishing;

FIG. 9-1 is a structural view of the oil-draining nitrogen-injecting fire extinguishing apparatus of the present invention;

FIG. 9-2 is a schematic view of a nitrogen-filled fire suppression cabinet;

FIG. 10 is a fire suppression control flow diagram of the present invention;

in the figure: the system comprises a fire wall, an emergency oil pool, an oil discharge ramp, an oil discharge hole, a transformer, an e-oil conservator, an f-nitrogen injection fire-extinguishing cabinet, a g-nitrogen injection fire-extinguishing equipment nitrogen injection fire-extinguishing pipeline, an h-nitrogen injection fire-extinguishing pipeline automatic butt-joint locking device, an i-transformer preset nitrogen injection fire-extinguishing pipeline, a j-transformer oil tank oil discharge pipeline, a k-transformer oil conservator oil discharge pipeline, a1 a-side casing pipe lifting seat explosion anti-explosion device, a1 b-top casing pipe lifting seat explosion anti-explosion device, a 2-fire-extinguishing system pipe network explosion prevention device, a 3-oil blocking and oil discharge device, a 4-dry powder-nitrogen injection fire-extinguishing combined system and a 5-dry powder-nitrogen injection fire-extinguishing combined independent fire alarm linked controller.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention.

1. Explosion fire characteristics and fire parts of transformer

The flash point of the transformer oil is 140 ℃, the ignition point is about 165-180 ℃, and the self-ignition point is about 332 ℃. Generally, as the insulation materials such as cable paper, cotton yarn, cloth, wood block and the like in the transformer gradually age, the insulation strength is reduced, when the conditions that the transformer has a penetrating fault, overvoltage impact and poor overhauling quality to cause local insulation damage, the transformer oil is degraded or the transformer is wetted when water enters the transformer are met, the insulation breakdown of the transformer can be caused to cause short circuit and generate high-temperature electric arc, the transformer oil is rapidly decomposed and gasified under the high-temperature action of the electric arc, the internal pressure of the transformer is increased rapidly, when the pressure is too high to the weak flange-connected pressure-bearing parts of a transformer bushing, a bushing lifting seat, a pressure regulating switch and the like on the shell of an accident point and cannot bear the pressure, a large amount of high-temperature transformer oil exceeding the self-ignition point is sprayed out of the transformer and is violently combusted after encountering air, so that transformer explosion fire, spreading fire, continuous fire and reburning fire are formed. The utility model discloses temporarily and according to the weak position destruction degree of transformer pressure-bearing, how much, transformer oil temperature height, splash scope size, the difficult degree of putting out a fire and roughly divide into three types with transformer explosion conflagration severity: a light explosion fire, a moderate explosion fire, and a severe explosion fire.

The fire part: the transformer fire only occurs at the pressure-bearing weak parts such as the joints of the transformer bushing and the voltage regulating switch flange, and simultaneously, only one position of the transformer fire breaks out or explodes. The utility model discloses divide into the conflagration position temporarily and put out a fire key position, general top conflagration position and general side conflagration position. The fire extinguishing key position refers to a fire position which can cause direct losses such as adjacent transformers, electrical equipment and cable spread fire positions and continuous fire burning collapse of steel beams of a transformer outgoing line framework, and indirect losses such as total station voltage loss of a transformer substation, power failure of important users, fire environmental pollution, social influence and the like; the general top fire part and the general side fire part refer to the fire accident point on the top or the side, but direct losses such as continuous fire burning collapse of adjacent transformers, electrical equipment and cables and steel beams of a transformer outgoing line framework cannot be caused, and the fire part which has only small indirect losses such as fire environmental pollution, social influence and the like can be extinguished by a fire brigade after the fire.

2. Detailed description of the embodiments of the present invention

As shown in fig. 1-9, the utility model provides a transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire fighting system, which comprises a sleeve pipe lifting seat explosion-proof device 1, a fire extinguishing system pipe network explosion-proof device 2, an oil blocking and discharging device 3, a dry powder-nitrogen injection fire extinguishing combined system 4 and a dry powder-nitrogen injection fire extinguishing combined independent fire fighting fire alarm linked controller 5 with various control modules;

the sleeve lifting seat explosion-proof device 1 comprises a side sleeve lifting seat explosion-proof device 1a and a top sleeve lifting seat explosion-proof device 1b, wherein the side sleeve lifting seat explosion-proof device consists of explosion-proof upright posts A1, an explosion-proof cross beam A2 fixed between the explosion-proof upright posts A1, an explosion-proof cross beam support A3 arranged between the explosion-proof cross beams A2, a lifting seat explosion-proof clamp connecting rod A4 fixed on the explosion-proof upright posts A1, a lifting seat explosion-proof clamp transverse shoulder A5 fixed on the lifting seat explosion-proof clamp connecting rod A4, a lifting seat explosion-proof clamp pressure arm A6 fixed on the lifting seat explosion-proof clamp transverse shoulder A5 and a lifting seat explosion-proof ring arm fixed on the explosion-proof upright posts A1 through the lifting seat explosion-proof ring arm connecting rod A7; the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm A8, a lifting seat explosion-proof left ring arm A9 and a lifting seat explosion-proof left and right ring arm connecting plate A10; an explosion-proof upright post A1, a lifting seat explosion-proof ring arm connecting rod A7, a lifting seat explosion-proof right ring arm A8, a lifting seat explosion-proof left ring arm A9 and a lifting seat explosion-proof left and right ring arm connecting plate A10 in the side sleeve lifting seat explosion-proof device are reinforced by double explosion-proof upright post materials; the top surface sleeve lifting seat explosion-proof device and the side surface sleeve lifting seat explosion-proof device have the same components and structure, and comprise an explosion-proof upright post A1, an explosion-proof cross beam A2 fixed between the explosion-proof upright posts A1, an explosion-proof cross beam pillar A3 arranged between the explosion-proof cross beams A2, a lifting seat explosion-proof clamp connecting rod A4 fixed on the explosion-proof upright post A1, a lifting seat explosion-proof clamp transverse shoulder A5 fixed on the lifting seat explosion-proof clamp connecting rod A4, a lifting seat explosion-proof clamp pressure arm A6 fixed on the lifting seat explosion-proof clamp transverse shoulder A5 and a lifting seat explosion-proof ring arm fixed on the explosion-proof upright post A1 through a lifting seat explosion-proof ring arm connecting rod A7; the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm A8, a lifting seat explosion-proof left ring arm A9 and a lifting seat explosion-proof left and right ring arm connecting plate A10; a lifting seat explosion-proof clamp connecting rod A4, a lifting seat explosion-proof clamp transverse shoulder A5, a lifting seat explosion-proof clamp pressing arm A6, a lifting seat explosion-proof ring arm connecting rod A7, a lifting seat explosion-proof right ring arm A8, a lifting seat explosion-proof left ring arm A9 and a lifting seat explosion-proof left and right ring arm connecting plate A10 in the top surface sleeve lifting seat explosion-proof device are reinforced by double explosion-proof column materials;

referring to fig. 1 and 2-1 and fig. 2-2, the explosion-proof device of the sleeve lifting seat is arranged at one side close to the transformer sleeve lifting seat, when the transformer is seriously exploded, the sleeve lifting seat with the weight of hundreds of kilograms and the explosion part of the sleeve guide rod are prevented from flying to the air and then smashing the sleeve lifting seat and the explosion part to the ground, and the pipe network of the fire extinguishing system is smashed; meanwhile, the sleeve lifting seat explosion-proof device is arranged close to the transformer sleeve lifting seat to prevent the transformer sleeve lifting seat from moving back and forth, left and right and upwards after explosion, and prevent a crosspiece of the sleeve lifting seat from being arranged between a fire extinguishing system pipe network and a fire extinguishing system after the sleeve lifting seat is seriously exploded to prevent fire at the bottom outside a transformer oil tank from extinguishing fire;

referring to fig. 3, fire extinguishing systems pipe network explosion-proof equipment 2 includes side sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment and top sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment, wherein: the pipe network explosion-proof device of the side sleeve explosion fire-extinguishing system and the pipe network explosion-proof device of the top sleeve explosion fire-extinguishing system are respectively composed of a long upright post B1, an explosion-proof cross beam B2 fixed on the long upright post B1, an explosion-proof support B3 arranged between the explosion-proof cross beams B2 and an explosion-proof steel net B4 assembly between the explosion-proof cross beam B2 and the explosion-proof support B3; the fire extinguishing system pipe network explosion-proof device is arranged between the top surface or the side surface sleeve pipe lifting seat and the fire extinguishing system and is close to the position of a fire extinguishing system pipe network spray head, a flange of the transformer sleeve pipe lifting seat, large ceramic insulator fragments generated by sleeve pipe explosion and other parts smash the fire extinguishing system pipe network, and the damage of the transformer explosion and the small fragments generated by the transformer sleeve pipe explosion to operators can be prevented by reducing the gap of the explosion-proof net of the pipe network explosion-proof device;

the fire extinguishing system pipe network explosion-proof equipment has the characteristics that: 1) the explosion-proof device is arranged between a high-voltage sleeve and a medium-voltage sleeve of the transformer and a fire extinguishing system pipe network of the main transformer, is close to one side of the fire extinguishing system pipe network, and is 2.5-3.5 m away from the transformer; 2) the height of the explosion-proof device is 1m higher than that of a fire extinguishing system pipe network, the width of the explosion-proof device exceeds the sleeve explosion influence range by 1.5m, and the setting range is determined according to the specific transformer weak part structure and transformer explosion influence analysis; 3) because transformer porcelain insulator sleeve pipe explosion piece is more dispersed, the main effect that sets up the device does: a. the anti-explosion nets of the pipe network anti-explosion device of the side sleeve explosion fire-extinguishing system are arranged at the middle part and the upper part of the anti-explosion device; b. the gap of the explosion-proof net can be large or small, and the large-gap explosion-proof net is used for blocking large explosion parts after the transformer explodes, such as: the sleeve pipe risees the impact of seat flange, big porcelain insulator piece to the fire extinguishing systems pipe network, and the explosion-proof net of close clearance can be used to stop big explosion part after the transformer explosion if: impact of the sleeve lifting seat flange and medium and small porcelain insulator fragments on a fire extinguishing system pipe network; c. the small-gap explosion-proof net can prevent the harm of explosive such as small fragments and screws of the transformer to personnel.

Referring to fig. 4-1 and 4-2, the oil and oil blocking and discharging device 3 is composed of a vertical movable fireproof oil blocking plate C1, an inclined movable fireproof oil blocking plate C2, a movable patrol door C3, transformer explosion fire protection C4, an accident oil pool C5, an oil discharging ramp C6, an oil discharging hole C7 and an oil discharging well C8; wherein: the vertical movable fireproof oil baffle C1 consists of an oil baffle foundation C1a, an embedded part C1b embedded in the oil baffle foundation C1a, a stand column C1d connected with the embedded part C1b by bolts, a bottom cross beam C1C connected with the stand column C1d by bolts, welding or bayonets, a top cross beam C1e connected with the stand column C1d by bolts, welding or bayonets, and a fireproof oil baffle C1f fixed among the bottom cross beam C1C, the stand column C1d and the top cross beam C1 e; the inclined movable fireproof oil baffle C2 assembly is composed of an inclined short cantilever beam C2a fixed with a top cross beam C1e by bolts and bayonets and a fireproof oil baffle C2b fixed between the top cross beam C1e and the inclined short cantilever beam C2 a; the movable inspection door C3 assembly is composed of a door seam sealing buckle C3a welded on a stand column C1d, a door hinge C3b, a door frame C3C, a fireproof oil baffle plate C3d fixed on a door frame C3C and a door lock C3e, and the transformer explosion fire protection wall C4 adopts a transformer firewall; the emergency oil pool C5 adopts a transformer emergency oil pool, an oil discharge ramp C6 is arranged between the emergency oil pool C5 and the vertically movable fireproof oil baffle C1, and the gradient is more than 1%; the transformer oil flows into an oil discharge hole C7 on the wall of an accident oil pool C5 through an oil discharge ramp C6 and flows into the accident oil pool C5, pebbles are covered in the accident oil pool, the oil discharge ramp is arranged at the bottom of the accident oil pool, an oil discharge well C8 is arranged at the same time, the discharged transformer oil is converged into an oil discharge well C8 and then is connected into a main accident oil pool through an oil discharge pipeline, and the accident oil discharge process is completed; when the fire extinguishing device is specifically implemented, the oil discharge ramp, the oil discharge hole and the like need to be implemented in a civil engineering professional manner, and the fire extinguishing effect is influenced by the good or bad oil discharge effect; the fireproof, explosion-proof and beautiful appearance of the oil-blocking and oil-discharging facility are important, the inner side steel wire mesh can be adopted for the vertical movable fireproof oil-blocking plate, the inclined movable fireproof oil-blocking plate C2 and the fireproof oil-blocking plate of the movable inspection door C3 to prevent explosion, the outer side 8mm cesium potassium fireproof glass can prevent fireproof oil blocking, the fire-resistant time of a fire is more than 1.5-2.0 h, small transformer explosion part screws and ceramic insulator fragments can be prevented from damaging the fireproof glass, the cesium potassium fireproof glass is transparent when being heated in the fire extinguishing process, and the fire condition can be conveniently observed;

the oil blocking and discharging device is installed outside a transformer fire extinguishing system in a manner of being tightly attached to a transformer fire wall, the inner side of an anti-explosion oil blocking plate can be made of steel wire meshes for explosion prevention, and the outer side of the anti-explosion oil blocking plate is made of 8mm cesium potassium fireproof glass for fire prevention and oil blocking. Keep off oily oil extraction device self and have > 1.5 hours fire prevention ability and certain explosion-proof ability, rely on keeping off oily facility and prevent hot wall combined action, keep off oily restriction transformer oil trickling fire hazard range, rely on keeping off the inboard oil extraction ramp of oily device and accident oil bath etc. and arrange the oil, the performance surpasss the more important supplementary effect of putting out a fire of oil extraction of keeping off: (1) oil blocking: limiting the flowing range of transformer oil, limiting a large amount of transformer flowing oil (accounting for 80% of total oil of the transformer, and about 30 tons of transformer oil per 140 tons of transformer oil for single-phase change/three-phase change respectively) which exceeds the protection range of a transformer fire extinguishing system and causes the transformer fire extinguishing system to fail within the protection range of the transformer fire extinguishing system, and avoiding the external fire range exceeding the protection range of the fire extinguishing system and causing the fire extinguishing system to fail; (2) oil discharge: a large amount of combustible substances are discharged through the oil discharge ramp, the oil discharge hole and the accident oil pool, and a large-oil-amount main fire disaster with unmatched fire extinguishing capacity of the fire extinguishing system outside the transformer is artificially converted into a small-oil-amount secondary fire disaster (similar to a transformer oil basin fire disaster) with matched fire extinguishing capacity of the fire extinguishing system; (3) oil blocking limits the fire range, oil discharge converts main fire into secondary fire, fire intensity is artificially changed to assist fire extinguishing, and an external fire extinguishing system of the transformer initially has independent fire extinguishing conditions; (4) limiting transformer oil flow to enter a drainage system of the transformer substation and discharging the transformer oil to pollute the surrounding environment of the transformer substation;

referring to fig. 5-1 and 5-2, the dry powder-nitrogen injection fire extinguishing combined system 4 is composed of a fire position alarm positioning device, an external environment monitoring device, a dry powder fire extinguishing pipe network capable of controlling the fire position to spray and extinguish fire, a set of dry powder fire extinguishing devices and a novel oil discharge nitrogen injection fire extinguishing device; the fire position alarm positioning device consists of a non-contact fire detector D1, a non-contact electrical fire temperature positioning detector D2 arranged corresponding to a fire position and a transformer fire image monitoring probe D3 arranged obliquely above a protected transformer, and is connected with the dry powder-nitrogen injection combined system fire alarm linkage controller; the external environment monitoring device consists of a wind speed/rainfall monitor D4, a transformer power-off signal D5 and a transformer fire image monitoring probe D3, and is connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linked controller; the dry powder fire extinguishing pipe network consists of a fire extinguishing main pipe D6, a partition selector valve D7, a fire extinguishing distribution pipe D8, an electric injection control valve D9, a fixed or movable fire extinguishing branch pipe D10, a manual injection control valve D11 and a dry powder nozzle D12, wherein the fire extinguishing main pipe D6 is connected with an outlet of a complete set of dry powder fire extinguishing device; the complete set of dry powder fire extinguishing device consists of an equipment room D13, a dry powder starting gas cylinder D14 arranged in the equipment room D13, a dry powder driving cylinder group D15 and a dry powder mixing tank D16, wherein the dry powder mixing tank D16 is connected with the dry powder driving cylinder group D15 through a pipeline valve and a pressure gauge, the dry powder driving cylinder group D15 is connected with the dry powder starting gas cylinder D14 through a pipeline, and the outlet of the dry powder mixing tank D16 is connected with a fire extinguishing main pipe D6; the complete set of dry powder extinguishing device needs to have the secondary fire extinguishing capability outside the transformer oil tank for more than 4 times; the spray head arrangement of the dry powder fire extinguishing pipe network needs to pass a verification test of a transformer or a high-voltage reactor fixed fire extinguishing system, and a shielding-proof windproof rainproof additional spray head D12a is added in a blind area where a fire is shielded or a fire part where the influence of wind speed is large;

referring to fig. 9-1 and 9-2, the novel oil-discharging and nitrogen-injecting fire extinguishing device comprises a nitrogen-injecting fire extinguishing cabinet f, a nitrogen-injecting fire extinguishing pipeline g of nitrogen-injecting fire extinguishing equipment, an automatic butt-joint locking device h of the nitrogen-injecting fire extinguishing pipeline, a transformer preset nitrogen-injecting fire extinguishing pipeline i, a transformer oil tank oil-discharging pipeline j and a transformer oil conservator oil-discharging pipeline k; wherein: the outlet of the nitrogen injection fire extinguishing cabinet is connected with a nitrogen injection fire extinguishing pipeline of nitrogen injection fire extinguishing equipment, the transformer preset nitrogen injection fire extinguishing pipeline is connected with the outlet at the lower part of a transformer oil tank, and the junction of the nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment and the transformer preset nitrogen injection fire extinguishing pipeline is arranged at the position of an automatic butt-joint locking device of the nitrogen injection fire extinguishing pipeline; the transformer oil discharge pipeline is set as two independent oil discharge pipelines, namely an independent transformer oil tank oil discharge pipeline and a transformer conservator oil discharge pipeline, the transformer oil tank oil discharge pipeline is led out from the upper part of the transformer oil tank, and the tail end of the transformer oil tank oil discharge pipeline is directly connected into a transformer oil storage pool to discharge oil under pebbles; one end of a transformer oil conservator oil discharge pipeline is led out from a pipeline between a transformer oil conservator interception valve and a transformer oil conservator bottom valve, and the other end of the transformer oil conservator oil discharge pipeline is directly connected to a transformer oil storage pool for discharging oil under pebbles; the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller is arranged in a fire-fighting control room and a fire-fighting equipment room and is connected with a nitrogen injection fire-fighting cabinet, a nitrogen injection fire-fighting equipment nitrogen injection fire-fighting pipeline, a nitrogen injection fire-fighting pipeline automatic butt locking device, a transformer preset nitrogen injection fire-fighting pipeline, a transformer oil tank oil discharge pipeline and a fire-fighting linkage valve of the transformer oil conservator oil discharge pipeline through power and control cables; the nitrogen injection fire extinguishing cabinet component is a nitrogen injection fire extinguishing equipment component and comprises a starting nitrogen cylinder group D17, and the starting nitrogen cylinder group D17 is fixed in the nitrogen injection fire extinguishing cabinet by adopting a bracket; the starting cylinder head valve group D18 is fixedly arranged on the starting nitrogen cylinder group D17; one end of a starting gas pipeline D19 is connected with the valve outlet of the starting cylinder head valve group D18, and the other end is connected with a nitrogen main gas valve D20 fixed on the starting nitrogen cylinder group D17; the nitrogen main pipeline D22 is connected to the outlet of the nitrogen main air valve D20, and a nitrogen bottle pressure gauge D23, a nitrogen output pressure gauge D24, a nitrogen pressure reducing valve D25, a nitrogen charging fire-extinguishing delay device D26, a nitrogen throttling component D27 and a nitrogen output port D28 are sequentially arranged in the air flow direction; the nitrogen outlet D28 is positioned at the tail end of a main nitrogen pipeline D21, is arranged at the top of the nitrogen injection fire-extinguishing cabinet, and is connected with a nitrogen injection fire-extinguishing pipeline of external nitrogen injection fire-extinguishing equipment by adopting a flange; the nitrogen injection fire extinguishing cabinet is connected with the dry powder-nitrogen injection fire extinguishing combination independent fire-fighting fire alarm linkage controller through a power and control cable; the moisture-proof facility of the nitrogen injection fire-extinguishing cabinet comprises a temperature and humidity controller D29, a moisture-proof heater D30, a moisture-proof junction box D31 and a wiring terminal row D32; the temperature and humidity controller D29 is respectively connected with the moisture-proof heater D30, the moisture-proof junction box D31 and the wiring terminal row D32 through a power supply circuit and a control circuit; the two ends of a nitrogen injection fire extinguishing pipeline component of the nitrogen injection fire extinguishing equipment are respectively connected with a nitrogen outlet D28 at the outlet of a nitrogen injection fire extinguishing cabinet component and the butt joint locking device butt joint end at the inlet of an automatic butt joint locking device component of the nitrogen injection fire extinguishing pipeline, the nitrogen injection fire extinguishing pipeline component of the nitrogen injection fire extinguishing equipment consists of three sections of a nitrogen injection fire extinguishing main pipe D33, a nitrogen injection fire extinguishing pipeline compensator D34 and a nitrogen fire extinguishing selector valve D35 in sequence from the nitrogen outlet D28 led out of the nitrogen injection fire extinguishing cabinet to the butt joint locking device butt joint end D36 of the automatic butt joint locking device of the nitrogen injection fire extinguishing pipeline, all the sections adopt equal-diameter pipelines, and the whole section of pipeline is set as an oil-free pipeline; the automatic butt-joint locking device component of the nitrogen injection fire extinguishing pipeline consists of two components, namely a butt-joint locking device butt-joint end D36 and a butt-joint locking device bearing end D37, and the two ends of the component in the direction of nitrogen injection fire extinguishing airflow are respectively connected with a nitrogen fire extinguishing selection valve D35 of the component of the nitrogen injection fire extinguishing pipeline and an anti-misoperation electric fire extinguishing control valve D44 of the component of the transformer preset nitrogen injection fire extinguishing pipeline; the transformer preset nitrogen injection fire extinguishing pipeline assembly is an oil-carrying pipeline or an oil-free pipeline which is connected with a transformer oil tank and a nitrogen injection fire extinguishing pipeline, two ends of the transformer preset nitrogen injection fire extinguishing pipeline assembly are respectively connected with an outlet of a butt joint locking device receiving end D37 of the automatic butt joint locking device assembly of the nitrogen injection fire extinguishing pipeline and a nitrogen injection fire extinguishing pipeline interface at the lower part of the transformer oil tank, and the transformer preset nitrogen injection fire extinguishing pipeline assembly is formed by sequentially connecting a malfunction prevention electric fire extinguishing control valve D44, a nitrogen injection fire extinguishing pipeline compensator D43, a nitrogen exhaust assembly D42, a nitrogen injection fire extinguishing distribution pipe D41, a nitrogen diversion assembly D40, a nitrogen injection fire extinguishing branch pipe D39 and a nitrogen injection connector valve D38 along the direction of nitrogen injection fire extinguishing airflow; one end of the oil discharge pipeline component of the transformer oil tank is connected with the upper part of the transformer oil tank, and the other end of the oil discharge pipeline component is directly connected into the oil storage pool of the transformer to discharge oil under pebbles; the transformer oil tank oil drainage pipeline component is formed by sequentially connecting an oil drainage port valve D45, an oil drainage pipe exhaust component D46, an anti-misoperation oil drainage selection valve D47, an oil drainage valve leakage inspection port D48 and an oil drainage pipe D49, wherein the oil drainage valve leakage inspection port D48 is arranged behind the oil drainage pipe D49; one end of the oil drain pipeline component of the transformer oil conservator is led out from the middle of a connecting pipe of the transformer oil conservator and a transformer oil tank, and the other end of the oil drain pipeline component is directly connected below pebbles in an oil storage pool of the transformer; the oil drainage pipeline component of the transformer oil tank is formed by sequentially connecting an oil conservator oil drainage pipeline D50, an oil conservator oil drainage control valve D51, an oil drainage pipe leakage inspection valve D52 and an oil drainage pipe D53; the position of the led-out pipeline interface is positioned between the oil conservator stop valve and the oil conservator bottom valve of the transformer;

the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller 5 with various control modules consists of a fire alarm controller D54 and a fire linkage controller D55, and is connected with fire-fighting linkage devices such as a fire position alarm positioning device, an external environment monitoring device, a set of dry powder fire extinguishing devices, a partition selector valve D7 on a dry powder fire extinguishing pipe network capable of controlling fire positions to spray and extinguish fire, an electric spray control valve D9, an oil discharge nitrogen injection fire extinguishing device and the like; the fire extinguishing system comprises a partition selection valve D7, an independent fire-fighting fire alarm linkage controller for the combination of an oil discharge and nitrogen injection fire extinguishing device and dry powder-nitrogen injection fire extinguishing, an electric injection control valve and a sleeve fire alarm positioning infrared thermometer which are arranged in a linkage relationship, a starting condition control module, a short-time multi-injection module, an important fire part priority module, a general top fire part fire extinguishing control module and a general side fire part fire extinguishing control module are preset, and the linkage fire extinguishing system extinguishes the transformer fire parts under different fire conditions.

Under the effect guarantee of explosion-proof and keep off oily oil extraction device fender oil extraction and reduce the supplementary fire extinguishing of combustible substance in a large number, to the intensity mismatch of national standard transformer fire extinguishing systems fire extinguishing capacity and transformer conflagration, transformer fire extinguishing systems shower nozzle sets up the main reason that transformer fire extinguishing systems can't put out transformer explosion conflagration such as position and conflagration position mismatch, dry powder-notes nitrogen fire extinguishing combination system is for satisfying transformer conflagration independent fire extinguishing requirement, has carried out following pertinence improvement and application innovation to national standard conventional fire extinguishing systems: 1) extinguishing high-temperature high-oil-pressure high-flame internal and external fires connected with the inside and the outside of a transformer oil tank at the explosion position of a sleeve on the outer top of the transformer oil tank or a sleeve on the side surface, shielding the fire and reliving the main fire, continuously injecting nitrogen for 10 minutes from the lower part of the transformer oil tank by using a nitrogen injection fire extinguishing system, fully mixing and contacting a fire extinguishing agent and the transformer oil, stirring and cooling, forming covering and cooling for more than 30 minutes on the surface of the transformer oil tank, greatly reducing the speed and the quantity of combustible explosive gas formed by high-temperature decomposition of the transformer oil, and reducing the height and the temperature of the flame; improve external dry powder fire extinguishing system: through a transformer fire simulation verification test, the arrangement of spray heads is improved, the spray head protection is set in the explosion part of the sleeve lifting seat, and an additional low-flow spray head is added to the fire part with a large influence on the dead zone at the bottom outside the transformer and the wind speed; the fire alarm system is improved, the fire position alarm positioning device is arranged, under the condition that the total using amount of the fire extinguishing agent is not changed according to national standard, the arrangement of spray heads at fire-free positions such as radiators is reduced, 3-8 times of fire extinguishing agent is saved, the fire extinguishing intensity and the fire extinguishing time of explosion fire positions are increased, the fire extinguishing branch pipe of the transformer fire extinguishing system is provided with an electric injection control valve, the fire position alarm positioning device is linked with a pipe network electric injection control valve, and where fire is extinguished, the fire at the fire explosion positions is accurately extinguished; 2) set up outside environment monitoring devices, avoid starting the extravagant fire extinguishing agent of fire extinguishing systems under the strong wind and heavy rain environment, prevent that fire extinguishing systems from putting out a fire and becoming invalid: the fire extinguishing agent of the national standard dry powder fire extinguishing system has the lasting fire extinguishing time of only 60 seconds, if the strong wind and heavy rain lasts for 5 minutes and 10 minutes, and the sprayed dry powder is ineffective when the strong wind and heavy rain exist, which is the fatal defect of the dry powder system; in order to prevent transformer oil flowing from the bottom of the outer side of the transformer oil tank and heating fire to continuously heat the transformer oil in the transformer oil tank to cause the cooling and fire extinguishing failures of the oil discharging and nitrogen injecting fire extinguishing system under strong wind and heavy rain, a shielding, wind and rain preventing additional spray head D12a which is close to a radiator at the outer bottom of the transformer oil tank and shields the heating fire is arranged, and an important fire part priority module of a fire alarm linkage controller is adopted to link an electric injection control valve of the additional spray head at the bottom to extinguish the fire; in other cases, the external dry powder fire extinguishing system-the internal nitrogen injection fire extinguishing system can firstly utilize the nitrogen injection fire extinguishing system to extinguish the main body fire in the oil tank, and then the external dry powder fire extinguishing system is started to extinguish the secondary fire outside the transformer after the heavy wind and heavy rain stop, so that the fire extinguishing scheme does not influence the overall fire extinguishing effect of the transformer and can avoid the fatal defect of the transformer dry powder fire extinguishing system, and therefore, the external environment monitoring device is very necessary for the dry powder fire extinguishing system; 3) the method comprises the following steps of shielding a radiator at the outer bottom of a transformer oil tank from flowing and heating secondary fire, wherein the heating fire continuously heats transformer oil in the transformer oil tank to cause cooling and fire extinguishing failure of an oil discharge and nitrogen injection fire extinguishing system, and arranging an anti-shielding wind-proof and rain-proof additional spray head D12a which is close to the radiator at the outer bottom of the transformer oil tank to shield the heating fire, wherein a fire alarm linkage controller important fire part priority module is adopted for heavy wind and heavy rain, and an electric injection control valve for linking the bottom additional spray head is used for extinguishing fire; the secondary fire disaster at the top of the outer side of the transformer oil tank has small influence on the temperature reduction and fire extinguishment of the oil discharge and nitrogen injection fire extinguishing system, and the fire can be extinguished after heavy wind and heavy rain are weakened or stop; 4) for transformer secondary splashing fires with longer transformer explosion splashing distance, transformer radiators and other dead-angle shielding fires, a fire extinguishing control module for important fire parts of a fire alarm linkage controller is adopted, and fire extinguishing is carried out by a pipe network electric injection control valve for primary and secondary linkage fire parts; or a movable fire extinguishing branch pipe is adopted for manual fire extinguishing; 5) For 1 transformer explosion, and for the splash fire of 1-2 adjacent transformers, the fire extinguishing agent saved by using the fire position alarm positioning device and the fire position fixed-point fire extinguishing mode is used for extinguishing fire through the important fire position priority fire extinguishing module of the fire alarm linkage controller; 6) the fire at the explosion position of the transformer is reignited, and repeated fire alarming and repeated fire extinguishing are carried out through a short-time multiple fire extinguishing control module of the fire alarming linkage controller; 7) the fire fighting system is characterized in that a fire position alarm positioning and external environment monitoring device signal is received, a starting condition control module, a short-time multiple injection module, an important fire position priority module, a general top fire position fire extinguishing control module, a general side fire position fire extinguishing control module and a fire position fire extinguishing pipe network with an injection control valve are preset, a fire extinguishing system pipe network is controlled to extinguish internal and external fires of high-temperature high-oil-pressure high-flame connected inside and outside a transformer oil tank at an explosion position, and to shield and relive main body fires, a radiator at the bottom outside the transformer oil tank shields flowing secondary fires, and an explosion transformer and adjacent transformer splashing secondary fire are extinguished.

In the utility model, the nitrogen injection fire extinguishing pipeline adopts the automatic butt locking device of the nitrogen injection fire extinguishing pipeline to completely disconnect the nitrogen injection fire extinguishing pipeline from the transformer oil tank, and simultaneously, the accident of misoperation of the nitrogen injection fire extinguishing pipeline is disconnected and is transmitted to the accident channel of the transformer along the nitrogen injection fire extinguishing pipeline channel; a linkage device of the traditional oil discharging and nitrogen injecting fire extinguishing device is cancelled between the oil discharging and nitrogen injecting fire extinguishing pipelines, and meanwhile, a linkage channel of misoperation accidents of the oil discharging and nitrogen injecting fire extinguishing pipelines is disconnected; the control and starting device adopts a fire alarm linkage control system and a fire-fighting linkage control valve of a standard fire extinguishing system to replace a control device and a starting device of the traditional oil-discharging and nitrogen-injecting fire extinguishing device, and meanwhile, a false action channel of the oil-discharging and nitrogen-injecting device with the fire extinguishing device is disconnected; the transformer oil discharge pipeline is provided with two independent fire-fighting linkage direct oil discharge pipelines, namely a transformer oil tank oil discharge pipeline and a transformer conservator oil discharge pipeline; when the system is started, logic starting signals such as a fire alarm signal of the fire extinguishing system, tripping of the three-side circuit breaker of the transformer and the like are received at the same time, and the oil discharging and nitrogen injection fire extinguishing operation of the transformer cannot be started; one set of nitrogen injection extinguishing device can carry out fire extinguishing protection and the like to one or more transformers or reactors simultaneously.

Referring to fig. 6, the fire location alarm positioning device is composed of a non-contact fire detector D1, a non-contact electrical fire temperature detector D2 arranged corresponding to the fire location, and a transformer fire image monitoring probe D3 arranged obliquely above the protected transformer, and related signals are connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller through signal lines; when in fire, the non-contact point type fire infrared detector repeatedly alarms and resets the initial fire and the reburning fire; the non-contact electrical fire temperature detector monitors that the temperature of the explosion part of the transformer bushing lifting seat exceeds 600-700 ℃ and the transformer fire image monitoring probe detects a fire image to confirm the fire part; when a large-area fire disaster occurs, multipoint overtemperature and fire disaster images are combined to control all or most of the corresponding fire extinguishing pipe networks to open the injection control valves to extinguish the fire; the method comprises the following steps of (1) performing linkage control on the opening of a local injection control valve of a corresponding fire extinguishing pipe network to perform injection fire extinguishing by using a local fire single-point overtemperature + fire image; re-burning the local single-point over-temperature + fire image of the fire, and controlling the corresponding fire extinguishing pipe network local injection control valve to open the nozzle for multiple injection fire extinguishing; a radiator at the outer bottom of the transformer oil tank shields secondary fire hazards caused by flowing and heating, a shielding-proof, wind-proof and rain-proof additional spray head D12a is arranged, an important fire location priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller is adopted, and an electric injection control valve of an additional spray head D12a at the outer bottom of the transformer oil tank is linked to extinguish fire; the method comprises the following steps of exploding 1 transformer, splashing fire at the dangerous position of a sleeve lifting seat of 1-2 adjacent transformers, utilizing a fire position alarm positioning device and a fire position fixed-point fire extinguishing saved fire extinguishing agent, and extinguishing fire through an important fire position priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller; the fire part at the explosion position of the transformer bushing lifting seat is re-fired, and repeated fire alarming, resetting and repeated fire extinguishing are carried out through a short-time multiple fire extinguishing control module of the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarming linkage controller; the transformer with longer explosion splashing distance shields dead angle fire, such as secondary transformer splashing fire, transformer radiator and the like, and the fire is extinguished by adopting an important fire part priority module of a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller and a main and secondary linkage fire part pipe network electric injection control valve or by adopting a movable fire extinguishing branch pipe; the fire position alarming and positioning device is a core device for realizing the purposes of saving fire extinguishing agents when fire positions are not extinguished, realizing repeated extinguishment when fire positions are mainly extinguished, and realizing extinguishment success of the whole transformer fire dry powder-nitrogen injection extinguishment combined independent fire extinguishing system.

The wind speed/rainfall monitor D4 of external environment monitoring device sets up at fire extinguishing systems equipment top, is different from the following use of national standard fire extinguishing systems design standard restriction can only be at 2m/s wind speed, and actual outdoor environment can not satisfy national standard fire extinguishing systems service environment requirement far away, in order to avoid starting the extravagant fire extinguishing agent of fire extinguishing systems under the strong wind and heavy rain environment, prevents that fire extinguishing systems from taking place to put out a fire inefficacy: the fire extinguishing agent of the national standard dry powder fire extinguishing system has the lasting fire extinguishing time of only 60 seconds, if the strong wind and heavy rain lasts for 5 minutes and 10 minutes, and the sprayed dry powder is ineffective in the strong wind and heavy rain, which is the fatal defect of the dry powder system; in order to prevent transformer oil flowing from the bottom of the outer side of a transformer oil tank and continuously heating transformer oil in the transformer oil tank to cause cooling and fire extinguishing failure of an oil discharge and nitrogen injection fire extinguishing system under the conditions of strong wind and heavy rain, a shielding, wind and rain preventing additional spray head D12a is arranged, an important fire part priority module of a fire alarm linkage controller is adopted, and an electric injection control valve of the additional spray head at the bottom is linked to extinguish fire; under other conditions, the external dry powder fire extinguishing system-the internal nitrogen injection fire extinguishing system can firstly utilize the nitrogen injection fire extinguishing system to extinguish the main body fire in the oil tank, and then the external dry powder fire extinguishing system is started to extinguish the external secondary fire of the transformer when heavy wind and heavy rain stop or weaken, wherein the external dry powder system has the function of preventing the secondary fire of the transformer oil sprayed from the outside from continuously heating the oil tank of the transformer while the internal oil discharge nitrogen injection fire extinguishing system is prevented from cooling and extinguishing fire, and even has the reaction of guiding the transformer oil in the oil tank; the scheme of firstly injecting nitrogen to extinguish the fire and then extinguishing the fire by dry powder in strong wind and heavy rain does not affect the whole fire extinguishing effect of the transformer and can avoid the fatal defect of the dry powder fire extinguishing system of the transformer, so that the device for monitoring the external environment is not a dispensable device for the dry powder fire extinguishing system, and is a core device for extinguishing the fire failure of the transformer fire hazard dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system.

The controllable injection fire extinguishing pipe network of fire position is mainly to improve the pipe network shower nozzle arrangement of the fire extinguishing system according to the fire position of the case of fire, reduce the shower nozzle of radiator and other potential transformer no fire position, increased the ascending seat explosion position of sleeve pipe outside the potential transformer tank link main body fire position and additional shower nozzle that the bottom shelters from the fire position of heating, generally make up by 8-16 unequal fixed shower nozzles and 1-2 movable shower nozzles, every 1 or two shower nozzles set up a injection control valve, the injection control valve corresponds to the infrared point temperature appearance location temperature measurement value of sleeve pipe department and is controlled automatically by the linkage controller, or by the electric fire temperature detector + fire image detector manual control of the corresponding sleeve pipe department, the local or all starts to spray and put out a fire; or the fire extinguishing spray control modules such as an important fire position priority module, a general top fire position fire extinguishing control module, a general side fire position fire extinguishing control module and the like of the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller are used for controlling to extinguish fire at the top and the bottom of the transformer; the movable nozzles are arranged on the periphery of the dry powder extinguishing pipe network, each nozzle is provided with a manual valve, and the manual movement is adopted to extinguish the fire spreading caused by the splashing of the peripheral transformer oil.

Referring to fig. 7 and 8, the independent fire-fighting fire alarm linkage controller for dry powder-nitrogen injection fire extinguishing combination consists of a fire alarm controller and a fire linkage controller.

The method comprises the following specific implementation steps: the utility model discloses be different from current fire extinguishing system's fire alarm linkage control ware, the system connection conflagration position warning positioner, external environment monitoring device set up start condition control module, the key position of putting out a fire is preferred to put out a fire module, general top conflagration position control module that puts out a fire, modules such as general side conflagration position control of putting out a fire, practice thrift the fire extinguishing agent as far as, put out a fire the pipe network through accurate control and to the key protection in conflagration position, put out a fire transformer explosion conflagration, spread the conflagration, the fire of reburning, last conflagration.

A start condition control module: connect conflagration position warning positioner, external environment monitoring devices, show position infrared some temperature appearance temperature measurement value, transformer substation's environment wind speed value, transformer outage signal, transformer conflagration image signal, automatic mode at fire control controller display screen display such as fire alarm, each sleeve pipe of transformer and voltage regulating switch: the fire alarm acts, the multi-point or local single-point temperature measurement value exceeds the standard, the wind speed of the transformer substation reaches the standard, and the transformer power-off signal automatically starts to extinguish the fire; manual or telemechanical mode: action of a fire alarm, exceeding of a multi-point or local single-point temperature measurement value, reaching of a substation wind speed standard, transformer power-off signal and manual or transformer fire image signal confirm fire occurrence, and fire extinguishing is started manually, so that the problem that a substation alarm misoperation and an unattended substation misoperation-prevention fire extinguishing system are started manually when the fire extinguishing system is in a manual starting mode is solved.

Short-time multiple injection module: different from the spraying fire-extinguishing mode that the existing foam spraying fire-extinguishing system sprays for 60s all once to waste the fire-extinguishing agent and cannot extinguish the re-burning fire, the fire can be extinguished generally within about 8-10 s according to the fire-extinguishing test of the dry powder spraying system, and the module adopts a short-time spraying mode that all parts spray for less than 15s, so that the system has the fire-extinguishing capacity of more than 4 times of all spray heads and more than 8 times of local spray heads, the fire-extinguishing effect can be conveniently observed, the fire is extinguished for many times in a short time, the fire is extinguished while being observed, the fire-extinguishing agent is saved, the limited fire-extinguishing agent is concentrated, and the important parts of the re-burning fire and the continuous fire are extinguished;

important fire position priority module: regardless of the fire position, fire range, fire intensity, the serious insufficient problem of fire extinguishing intensity of the fire position of excessive fire extinguishing agent of no fire position waste of national standard transformer fire extinguishing system, the utility model discloses a main part and the theoretical innovation of secondary fire, consider the characteristics that the possible distribution range of explosion fire is wide and dispersed, divide the primary and secondary of putting out a fire, reduce the arrangement of no fire position shower nozzle, increase the sleeve pipe and rise seat explosion fire position and transformer tank outside bottom radiator and shelter from the rain-proof windproof additional shower nozzle D12a arrangement of sheltering from of heating the fire, adopt the priority module of key position of putting out a fire, concentrate inside notes nitrogen fire extinguishing system and outside dry powder fire extinguishing system key priority and put out transformer sleeve pipe and rise seat explosion department main part fire of fire, and transformer outside tank bottom oil tank heats the secondary and shelters from the fire; after the transformer explodes, some splashing fires with long splashing distances conceal the flowing fires, and the fires with small oil amount and unimportant fire can be not considered for fire extinguishment; the method is characterized in that heavy wind and heavy rain need to perform key fire extinguishing on a high-temperature high-pressure high-flame main body reburning fire in the transformer and a heating fire at the bottom of the outer side of a transformer oil tank, and when heavy wind and heavy rain stop or rotate weakly, a water spray fire extinguishing system is started to extinguish fire at other fire parts of the transformer; for 1 transformer explosion, the fire extinguishing agent saved by using the fire position alarm positioning device and the fire position fixed-point fire extinguishing is utilized for the splash fire occurring at the dangerous position of the lifting seat of the adjacent 1-2 adjacent transformer sleeves, and the fire can be extinguished through the key fire position priority module of the fire alarm linkage controller; for the re-ignition main body fire disaster at the explosion position of the transformer, a key fire disaster part priority module and a short-time multi-injection module can be adopted to perform key repeated fire extinguishment;

general top sleeve fire position fire extinguishing module: the utility model discloses dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller sets up general top sleeve pipe fire hazard position fire extinguishing module, specially to top sleeve pipe fire hazard characteristics, the fire hazard scope, to the outside spread conflagration of top transformer sleeve pipe explosion, continuous conflagration and transformer tank outer bottom trickle conflagration, the infrared temperature measurement multiple spot of first conflagration exceeds standard, electric fire temperature detector or some temperature appearance linkage corresponding position fire extinguishing pipe net all spray put out a fire, secondary reignites the conflagration, single-point or multiple point temperature measurement exceeds standard, control nitrogen injection fire extinguishing system carries out the continuous high temperature reignition conflagration to the explosion department that a large amount of high temperature transformer oil formed in the ware body and put out a fire, electric fire temperature detector linkage corresponding position fire extinguishing pipe net local spray put out a fire simultaneously; in the repeated re-ignition fire, an electrical fire temperature detector or a temperature igniter is linked with the local injection of the corresponding fire extinguishing pipe network to extinguish the fire for multiple times; during the fire extinguishing period, the fire extinguishing effect is closely observed on site or through a fire image detector, the fire extinguishing control error is corrected, and the fire extinguishing agent is saved to extinguish the key high-temperature reburning fire and sustain the fire.

Fire extinguishing module for fire position of general side casing: the utility model discloses dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller sets up general side sleeve pipe fire position fire extinguishing module, specially aim at side sleeve pipe fire characteristics, the fire scope, to side transformer explosion conflagration, the infrared temperature measurement multiple spot of primary fire exceeds standard, electric fire temperature detector or some temperature appearance linkage correspond transformer side sleeve pipe fire position side shower nozzle whole injection fire extinguishing, secondary reburning conflagration, single-point or two point temperature measurement exceed standard, electric fire temperature detector or some temperature appearance linkage correspond position fire extinguishing pipe network side shower nozzle local injection fire extinguishing, the simultaneous control nitrogen injection fire extinguishing system carries out the sustained cooling fire extinguishing to the sustained reburning conflagration that a large amount of high temperature transformer oil of ware body explosion formed; in the repeated re-ignition fire, an electrical fire temperature detector or a temperature indicator is linked with the local injection of the corresponding fire extinguishing pipe network to extinguish the fire for multiple times; during the fire extinguishing period, the fire extinguishing effect is closely observed on site or through monitoring images, the fire extinguishing control error is corrected, and the fire extinguishing agent is saved to extinguish the key re-ignition fire and the sustained fire.

Fig. 10 is a control flow chart of the fire extinguishing system of the present invention, comprising the following steps: the method comprises the steps of initial fire → action of a fire detector → sound and light alarm → manual or image confirmation of fire part → measurement of environmental influences such as wind speed and rainfall → exceeding system starting condition for waiting for environmental condition to become good → judgment of whether fire extinguishing key part exists → priority starting of nitrogen injection fire extinguishing system for fire extinguishing key part of wind speed and heavy rain → manual or remote start of fire extinguishing key part priority fire extinguishing module after environmental condition is met → starting of external dry powder system for whole, local and point injection for first 15s fire extinguishing → system reset → secondary continuous re-burning fire → action of fire detector → sound and light alarm → manual or image confirmation of fire part → manual or remote start of external dry powder fire extinguishing system for fire extinguishing according to local and point injection for second 15s fire extinguishing of fire part, and starting of internal oil discharge and nitrogen injection fire extinguishing and fire extinguishing continuous re-burning fire. When no fire-extinguishing key part exists: starting a top or side sleeve fire extinguishing module of a general part of the fire → starting a full, local and point injection primary 15s fire extinguishing system → system resetting → secondary continuous reburning fire → fire detector action → acousto-optic alarm → manual or image confirmation of the fire part → starting a top or side general part of the fire to reburn fire extinguishing module → manually or remotely starting the external dry powder extinguishing system to extinguish the fire according to the local and point injection secondary 15s of the fire part, and simultaneously starting internal oil discharge and nitrogen injection fire extinguishing fire to extinguish the continuous reburning fire → repeating fire till extinguishing the fire.

The utility model discloses summarize the analysis to national standard transformer fire extinguishing systems conflagration case existence problem, transformer main part conflagration and secondary conflagration theory of putting out a fire have been innovated, the casing pipe explosion-proof equipment that has risen the seat is improved again to the integration, fire extinguishing systems pipe network explosion-proof equipment, oil blocking oil discharge apparatus, supplementary fire extinguishing facilities such as dry powder-notes nitrogen fire extinguishing combination system and dry powder-notes nitrogen fire extinguishing combination independent fire control fire alarm linked controller, fire extinguishing systems, fire alarm linked system, the inherent defect of transformer fire extinguishing systems has been eliminated, it is innovative to have improved the independent fire extinguishing ability of fire extinguishing systems by a wide margin, the transformer explosion trickling conflagration of different fire intensities has been proposed to the nature, spread the conflagration, shelter from the conflagration, inside and outside conflagration, after-combustion conflagration, high oil pressure high flame conflagration of high temperature, the bottom of transformer tank outside is heated, The effective fire extinguishing scheme of 1 transformer explosion fire after the transformer explosion and 1-2 adjacent transformers splash fire realizes the automatic fire extinguishing of the transformer fire without depending on the whole process of a fire brigade, solves the problems that the national standard transformer fire extinguishing system is smashed and destroyed by transformer explosion parts and fails, the transformer explosion fire range exceeds the protection range of the fire extinguishing system, the fire extinguishing capability of the transformer fire extinguishing system is not matched with the intensity of the transformer fire, the setting part of the transformer fire extinguishing system is not matched with the fire part, the national standard transformer fire extinguishing system does not put out the measures of the transformer for shielding fire, internal and external fire, reignition fire and heating fire at the bottom outside of a transformer oil tank, and the like, reduces combustible substances by discharging a large amount of oil, coordinates the fire extinguishing coordination of the water spray-nitrogen injection fire extinguishing system, shortens the fire extinguishing time by four to five times or more than for a large-flow fire gun, the environmental and air pollution in the fire extinguishing process is reduced, and the problems that the national investment is wasted due to ineffective fire extinguishing of the existing fire extinguishing system, and serious environmental pollution is caused around a transformer substation due to the fact that a large amount of oil-water mixture flows into a drainage system of the transformer substation to be discharged after the fire of the large-flow water-system fire gun is extinguished are solved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims

1. The transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire fighting system is characterized by consisting of a sleeve lifting seat explosion-proof device (1), a fire fighting system pipe network explosion-proof device (2), an oil blocking and discharging device (3), a dry powder-nitrogen injection fire extinguishing combined system (4) and a dry powder-nitrogen injection fire extinguishing combined independent fire fighting fire alarm linked controller (5) with various control modules;

the sleeve lifting seat explosion-proof device (1) comprises a side sleeve lifting seat explosion-proof device (1a) and a top sleeve lifting seat explosion-proof device (1b), wherein the side sleeve lifting seat explosion-proof device consists of explosion-proof upright posts (A1), an explosion-proof cross beam A (A2) fixed between the explosion-proof upright posts (A1), an explosion-proof cross beam support post (A3) arranged between the explosion-proof cross beams A (A2), a lifting seat explosion-proof clamp connecting rod (A4) fixed on the explosion-proof upright posts (A1), a lifting seat explosion-proof clamp transverse shoulder (A5) fixed on the lifting seat explosion-proof clamp connecting rod (A4), a lifting seat explosion-proof clamp pressure arm (A6) fixed on the lifting seat explosion-proof clamp transverse shoulder (A5) and a lifting seat explosion-proof ring arm fixed on the explosion-proof upright posts (A1) through the lifting seat explosion-proof ring arm connecting rod (A7); the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm (A8), a lifting seat explosion-proof left ring arm (A9) and a lifting seat explosion-proof left and right ring arm connecting plate (A10); an explosion-proof upright post (A1), a lifting seat explosion-proof ring arm connecting rod (A7), a lifting seat explosion-proof right ring arm (A8), a lifting seat explosion-proof left ring arm (A9) and a lifting seat explosion-proof left and right ring arm connecting plate (A10) in the side sleeve lifting seat explosion-proof device are reinforced by double explosion-proof upright post materials; the top surface sleeve lifting seat explosion-proof device and the side surface sleeve lifting seat explosion-proof device have the same components and structure, and consist of explosion-proof upright posts (A1), explosion-proof cross beams A (A2) fixed among the explosion-proof upright posts (A1), explosion-proof cross beam pillars (A3) arranged among the explosion-proof cross beams A (A2), lifting seat explosion-proof clamp connecting rods (A4) fixed on the explosion-proof upright posts (A1), lifting seat explosion-proof clamp transverse shoulders (A5) fixed on the lifting seat explosion-proof clamp connecting rods (A4), lifting seat explosion-proof clamp arms (A6) fixed on the lifting seat explosion-proof clamp transverse shoulders (A5) and lifting seat explosion-proof ring arms fixed on the explosion-proof upright posts (A1) through the lifting seat explosion-proof ring arm connecting rods (A7); the lifting seat explosion-proof ring arm comprises a lifting seat explosion-proof right ring arm (A8), a lifting seat explosion-proof left ring arm (A9) and a lifting seat explosion-proof left and right ring arm connecting plate (A10); a lifting seat explosion-proof clamp connecting rod (A4), a lifting seat explosion-proof clamp transverse shoulder (A5), a lifting seat explosion-proof clamp pressing arm (A6), a lifting seat explosion-proof ring arm connecting rod (A7), a lifting seat explosion-proof right ring arm (A8), a lifting seat explosion-proof left ring arm (A9) and a lifting seat explosion-proof left and right ring arm connecting plate (A10) in the top surface sleeve lifting seat explosion-proof device are reinforced by double explosion-proof upright column materials;

fire extinguishing systems pipe network explosion-proof equipment (2) include side sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment and top sleeve pipe explosion fire extinguishing systems pipe network explosion-proof equipment, wherein: the pipe network explosion-proof device of the side surface sleeve explosion fire-extinguishing system and the pipe network explosion-proof device of the top surface sleeve explosion fire-extinguishing system are respectively composed of a long upright post (B1), an explosion-proof beam B (B2) fixed on the long upright post (B1), an explosion-proof support (B3) arranged between the explosion-proof beams B (B2), and an explosion-proof steel net (B4) assembly between the explosion-proof beam B (B2) and the explosion-proof support (B3);

the oil retaining and discharging device (3) consists of a vertical movable fireproof oil retaining plate A (C1), an inclined movable fireproof oil retaining plate B (C2), a movable inspection door (C3), a transformer firewall (C4), an emergency oil pool (C5), an oil discharging ramp (C6), an oil discharging hole (C7) and an oil discharging well (C8); wherein: the vertically movable fireproof oil baffle A (C1) is composed of an oil baffle base (C1a), an embedded part (C1b) embedded in the oil baffle base (C1a), a stand column (C1d) connected with the embedded part (C1b), a bottom cross beam (C1C) connected with the stand column (C1d), a top cross beam (C1e) connected with the stand column (C1d), and a fireproof oil baffle C (C1f) fixed between the bottom cross beam (C1C), the stand column (C1d) and the top cross beam (C1 e); the inclined movable fireproof oil baffle B (C2) assembly consists of an inclined short cantilever beam (C2a) fixed with a top cross beam (C1e) by bolts and bayonets and a fireproof oil baffle D (C2B) fixed between the top cross beam (C1e) and the inclined short cantilever beam (C2 a); the movable inspection door (C3) assembly consists of a door seam sealing buckle (C3a) welded on a stand column (C1d), a door hinge (C3b), a door frame (C3C), a fireproof oil baffle plate E (C3d) fixed on the door frame (C3C) and a door lock (C3E), and the transformer firewall (C4) adopts a transformer firewall; the emergency oil pool (C5) adopts a transformer emergency oil pool, and an oil discharge ramp (C6) is arranged between the emergency oil pool (C5) and the vertically movable fireproof oil baffle plate A (C1); the transformer oil flows into an oil discharge hole (C7) on the wall of an accident oil pool (C5) through an oil discharge ramp (C6) and flows into the accident oil pool (C5), pebbles are covered on the accident oil pool, the oil discharge ramp is arranged at the bottom of the accident oil pool, an oil discharge well (C8) is arranged at the same time, and the discharged transformer oil is converged into an oil discharge well (C8) and then is connected into the total accident oil pool through an oil discharge pipeline;

the dry powder-nitrogen injection fire extinguishing combined system (4) consists of a fire position alarm positioning device, an external environment monitoring device, a dry powder fire extinguishing pipe network capable of controlling the fire position to spray and extinguish fire, a set of dry powder fire extinguishing device and a novel oil discharge and nitrogen injection fire extinguishing device; the external environment monitoring device consists of a wind speed/rainfall monitor (D4), a transformer power-off signal (D5) and a transformer fire image monitoring probe (D3); the dry powder fire extinguishing pipe network consists of a fire extinguishing main pipe (D6), a partition selection valve (D7), a fire extinguishing distribution pipe (D8), an electric injection control valve (D9), a fixed or movable fire extinguishing branch pipe (D10), a manual injection control valve A (D11) and a dry powder nozzle (D12), wherein the fire extinguishing main pipe (D6) is connected with an outlet of the set of dry powder fire extinguishing device; the complete set of dry powder fire extinguishing device consists of an equipment room (D13), a dry powder starting gas cylinder (D14) arranged in the equipment room (D13), a dry powder driving cylinder group (D15) and a dry powder mixing tank (D16), wherein the dry powder mixing tank (D16) is connected with the dry powder driving cylinder group (D15) through a pipeline valve and a pressure gauge, the dry powder driving cylinder group (D15) is connected with the dry powder starting gas cylinder (D14) through a pipeline, and the outlet of the dry powder mixing tank (D16) is connected with a fire extinguishing main pipe (D6); the dry powder fire extinguishing pipe network spray head arrangement is characterized in that a transformer or high-voltage reactor fixed fire extinguishing system verification test is carried out, and a shielding-proof windproof rainproof additional spray head (D12a) is additionally arranged at a blind area where a fire is shielded or a fire part where the influence of wind speed is large; the fire position alarm positioning device, the external environment monitoring device, the dry powder fire extinguishing pipe network electric injection control valve, the set of dry powder fire extinguishing device and the novel oil discharge and nitrogen injection fire extinguishing device are connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller;

the fire position alarming and positioning device consists of a non-contact fire detector (D1), a non-contact electrical fire temperature detector (D2) arranged corresponding to a fire position and a transformer fire image monitoring probe (D3) arranged obliquely above a protected transformer, wherein signals of the non-contact electrical fire temperature detector are connected with the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarming and interlocking controller through signal lines; after the fire position is positioned, an important fire position priority module of the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller is used for positioning and extinguishing the fire by a linkage sleeve lifting seat explosion fire position and a nozzle electric injection control valve of a transformer oil tank outer bottom radiator for shielding a heating fire position;

a wind speed/rainfall monitor (D4) of an external environment monitoring device is arranged on the top of the fire extinguishing system equipment;

the oil discharge and nitrogen injection fire extinguishing device comprises a nitrogen injection fire extinguishing cabinet (f), a nitrogen injection fire extinguishing pipeline (g) of the nitrogen injection fire extinguishing equipment, an automatic butt joint locking device (h) of the nitrogen injection fire extinguishing pipeline, a transformer preset nitrogen injection fire extinguishing pipeline (i), a transformer oil tank oil discharge pipeline (j) and a transformer oil conservator oil discharge pipeline (k); wherein: the outlet of the nitrogen injection fire extinguishing cabinet is connected with a nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment, the transformer preset nitrogen injection fire extinguishing pipeline is connected with the outlet at the lower part of the transformer oil tank, and the junction of the nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment and the transformer preset nitrogen injection fire extinguishing pipeline is arranged at the position of the automatic butt-joint locking device of the nitrogen injection fire extinguishing pipeline; the transformer oil discharge pipeline is set as two independent oil discharge pipelines, namely an independent transformer oil tank oil discharge pipeline and a transformer conservator oil discharge pipeline, the transformer oil tank oil discharge pipeline is led out from the upper part of the transformer oil tank, and the tail end of the transformer oil tank oil discharge pipeline is directly connected into a transformer oil storage pool to discharge oil under pebbles; one end of a transformer conservator oil discharge pipeline is led out from a pipeline between a transformer conservator interception valve and a transformer conservator bottom valve, and the other end of the transformer conservator oil discharge pipeline is directly connected to a transformer oil storage pool for discharging oil under pebbles; the dry powder-nitrogen injection fire extinguishing combined independent fire alarm linkage controller is arranged in a fire control room or a fire extinguishing system equipment room and is connected with a nitrogen injection fire extinguishing cabinet, a nitrogen injection fire extinguishing pipeline of the nitrogen injection fire extinguishing equipment, an automatic butt locking device of the nitrogen injection fire extinguishing pipeline, a preset nitrogen injection fire extinguishing pipeline of a transformer, an oil discharging pipeline of a transformer oil tank and a fire linkage valve of the oil discharging pipeline of the transformer oil conservator; the nitrogen injection fire extinguishing cabinet component is a nitrogen injection fire extinguishing equipment component and comprises a starting nitrogen bottle group (D17), and the starting nitrogen bottle group (D17) is fixed in the nitrogen injection fire extinguishing cabinet by adopting a bracket; the starting bottle head valve group (D18) is fixedly arranged on the starting nitrogen bottle group (D17); one end of the starting gas pipeline (D19) is connected with the valve outlet of the starting bottle head valve group (D18), and the other end is connected with a nitrogen main gas valve (D20) fixed on the starting nitrogen bottle group (D17); a nitrogen main pipeline A (D22) is connected to an outlet of a nitrogen main valve (D20), and components of a nitrogen bottle pressure gauge (D23), a nitrogen output pressure gauge (D24), a nitrogen pressure reducing valve (D25), a nitrogen-filled fire-extinguishing delay device (D26), a nitrogen throttling component (D27) and a nitrogen output port (D28) are sequentially arranged in the air flow direction; the nitrogen output port (D28) is positioned at the tail end of the main nitrogen pipeline B (D21), is arranged at the top of the nitrogen injection fire-extinguishing cabinet and is connected with a nitrogen injection fire-extinguishing pipeline of external nitrogen injection fire-extinguishing equipment by adopting a flange; the nitrogen injection fire extinguishing cabinet is connected with the dry powder-nitrogen injection fire extinguishing combination independent fire-fighting fire alarm linkage controller through a power and control cable; the moisture-proof facility of the nitrogen injection fire-extinguishing cabinet comprises a temperature and humidity controller (D29), a moisture-proof heater (D30), a moisture-proof junction box (D31) and a terminal block (D32); the temperature and humidity controller (D29) is respectively connected with the moisture-proof heater (D30), the moisture-proof junction box (D31) and the wiring terminal row (D32) through a power supply circuit and a control circuit; the two ends of a nitrogen injection fire extinguishing pipeline component of the nitrogen injection fire extinguishing equipment are respectively connected with a nitrogen output port (D28) at the outlet of a nitrogen injection fire extinguishing cabinet component and a butt joint locking device butt joint end at the inlet of an automatic butt joint locking device component of the nitrogen injection fire extinguishing pipeline, the nitrogen injection fire extinguishing pipeline component of the nitrogen injection fire extinguishing equipment consists of a nitrogen injection fire extinguishing main pipe (D33), a nitrogen injection fire extinguishing pipeline compensator A (D34) and a nitrogen fire extinguishing selector valve (D35) in sequence from the nitrogen output port (D28) led out of the nitrogen injection fire extinguishing cabinet to the butt joint locking device butt joint end (D36) of the automatic butt joint locking device of the nitrogen injection fire extinguishing pipeline, all pipelines adopt equal-diameter pipelines, and the whole pipeline is set as an oilless pipeline; the automatic butt-joint locking device assembly of the nitrogen injection fire extinguishing pipeline consists of a butt-joint locking device butt-joint end (D36) and a butt-joint locking device receiving end (D37), and a nitrogen fire extinguishing selection valve (D35) and a misoperation-preventing electric fire extinguishing control valve (D44) of a transformer preset nitrogen injection fire extinguishing pipeline assembly are respectively connected with the two ends of the assembly along the direction of nitrogen injection fire extinguishing airflow; the transformer is provided with a nitrogen injection fire extinguishing pipeline assembly in advance, two ends of the nitrogen injection fire extinguishing pipeline assembly are respectively connected to an outlet of a butt joint locking device receiving end (D37) of the nitrogen injection fire extinguishing pipeline automatic butt joint locking device assembly and a nitrogen injection fire extinguishing pipeline interface at the lower part of a transformer oil tank, and the nitrogen injection fire extinguishing pipeline assembly is formed by sequentially connecting a malfunction prevention electric fire extinguishing control valve (D44), a nitrogen injection fire extinguishing pipeline compensator B (D43), a nitrogen exhaust assembly (D42), a nitrogen injection fire extinguishing distribution pipe (D41), a nitrogen distribution assembly (D40), a nitrogen injection fire extinguishing branch pipe (D39) and a nitrogen injection interface valve (D38) along the direction of nitrogen injection fire extinguishing airflow; one end of the oil discharge pipeline component of the transformer oil tank is connected with the upper part of the transformer oil tank, and the other end of the oil discharge pipeline component is directly connected into the oil storage pool of the transformer to discharge oil under pebbles; the transformer oil tank oil drainage pipeline component is formed by sequentially connecting an oil drainage port valve (D45), an oil drainage pipe exhaust component (D46), an anti-misoperation oil drainage selection valve (D47), an oil drainage valve leakage inspection port (D48) and an oil drainage pipe A (D49), wherein the oil drainage valve leakage inspection port (D48) is arranged behind the oil drainage pipe A (D49); one end of the oil drain pipeline component of the transformer oil conservator is led out from the middle of a connecting pipe of the transformer oil conservator and a transformer oil tank, and the other end of the oil drain pipeline component is directly connected below pebbles in an oil storage pool of the transformer; the oil drainage pipeline assembly of the transformer oil tank is formed by sequentially connecting an oil conservator oil drainage pipeline (D50), an oil conservator oil drainage control valve (D51), an oil drainage pipe leakage maintenance valve (D52) and an oil drainage pipe B (D53); the position of the led-out pipeline interface is positioned between the cutoff valve of the transformer conservator and the bottom valve of the conservator;

the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller (5) with various control modules consists of a fire alarm controller (D54) and a fire linkage controller (D55), and the dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller is connected with fire-fighting linkage devices such as a fire position alarm positioning device, an external environment monitoring device, a set of dry powder fire extinguishing devices, a partition selector valve (D7) on a dry powder fire extinguishing pipe network capable of controlling fire position injection fire extinguishing, an electric injection control valve B (D9), an oil discharge nitrogen injection fire extinguishing device and the like; the fire extinguishing system is characterized in that a partition selection valve (D7), an oil discharge and nitrogen injection fire extinguishing device, a dry powder-nitrogen injection fire extinguishing combined independent fire-fighting fire alarm linkage controller, an electric injection control valve and a sleeve fire alarm positioning infrared thermometer are set to be in linkage relation, a starting condition control module, a short-time repeated injection module, an important fire part priority module, a general top fire part fire extinguishing control module and a general side fire part fire extinguishing control module are preset, and the linkage fire extinguishing system extinguishes transformer fire parts under different fire conditions.

2. The transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system according to claim 1, characterized in that: the sleeve lifting seat explosion-proof device (1) is arranged near a transformer sleeve lifting seat, the number of lifting seat explosion-proof clamping pressure arms (A6) fixed on a lifting seat explosion-proof clamping transverse shoulder (A5) is 2, and the lifting seat explosion-proof clamping pressure arms are respectively fixed at two ends of the lifting seat explosion-proof clamping transverse shoulder (A5); the number of the lifting seat explosion-proof ring arms fixed on the explosion-proof upright post (A1) is at least one; the distance between the anti-explosion ring arm of the lifting seat and the outer wall of the sleeve lifting seat is 0.1m, the height of the anti-explosion upright post (A1) is 0.3m higher than the top of the transformer sleeve lifting seat, and the height of the anti-explosion clamping arm (A6) of the lifting seat is 0.05m higher than the flange plate at the top of the transformer sleeve lifting seat.

3. The transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system according to claim 1, characterized in that: the fire extinguishing system pipe network explosion-proof device (2) is arranged between a transformer high-voltage sleeve pipe, a medium-voltage sleeve pipe and a main transformer fire extinguishing system pipe network, is close to one side of the fire extinguishing system pipe network, is 2.5-3.5 m away from a transformer, is higher than the fire extinguishing system pipe network by 1m, and has a width exceeding the sleeve pipe explosion influence range by 1.5 m.

4. The transformer explosion fire dry powder-nitrogen injection fire extinguishing combined independent fire extinguishing system according to claim 1, characterized in that: the oil blocking and discharging device (3) is arranged on one side of the transformer with the lateral high-voltage bushing and is 2.5-3.5 m away from the edge of the lateral bushing; the vertical movable fireproof oil baffle A (C1) is arranged by depending on a transformer fireproof wall (C4); the inclined movable fireproof oil baffle plates B (C2) are arranged in the range of 1.8-2.2 m on the two sides of the side sleeve; the movable patrol doors (C3) are arranged on patrol lanes or fire-fighting lanes on two sides of the transformer.