CN112121350A - Environment-friendly transformer multi-fire-type simulation system - Google Patents
Environment-friendly transformer multi-fire-type simulation system Download PDFInfo
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- CN112121350A CN112121350A CN202010809336.8A CN202010809336A CN112121350A CN 112121350 A CN112121350 A CN 112121350A CN 202010809336 A CN202010809336 A CN 202010809336A CN 112121350 A CN112121350 A CN 112121350A
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- A62—LIFE-SAVING; FIRE-FIGHTING
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- A62C99/009—Methods or equipment not provided for in groups A62C99/0009 - A62C99/0081
Abstract
The disclosure relates to the technical field of disaster prevention and reduction of power systems, and particularly discloses an environment-friendly transformer multi-fire-type simulation system. The simulation system includes: a transformer housing with an internal coil removed; the sleeve fire module, the overflow fire module and the spray fire module are all arranged in the transformer shell; the oil tank, the oil injection pipeline and the pump set are all arranged outside the transformer shell, and the pump set is used for providing power so as to inject oil in the oil tank into at least one of the sleeve fire module, the overflow fire module and the spray fire module by using the oil injection pipeline; the power supply is used for supplying power to at least one of the sleeve fire module, the overflow fire module and the spray fire module; and the secondary control module is connected with the power supply, the pump set, the sleeve fire module, the overflow fire module and the spray fire module. Therefore, the method for simulating multiple fire types of the environment-friendly large transformer can be provided, a small amount of transformer oil is used for simulating multiple real fires, and a test basis is provided for fire extinguishing mode research.
Description
Technical Field
The disclosure relates to the technical field of disaster prevention and reduction of power systems, in particular to an environment-friendly multi-fire-type simulation system of a transformer.
Background
With the rapid development of national economy, the scale of the power grid is gradually enlarged, and the operational reliability of the power transformation equipment faces more severe examination. The oil-immersed power transformer is a core of a transformer substation, the inside of the power transformer contains several tons to hundreds of tons of hydrocarbon insulating mineral oil, fire and explosion risks exist when a fault occurs, the power transformer can be developed into a large disastrous fire, and the difficulty in fighting is very high. The large-scale oil-filled equipment is the core equipment of a power grid, the extra-high voltage converter transformer is the most important equipment of the power grid due to large capacity, once a fire disaster happens, the equipment can be burnt, heavy property loss is caused, power supply interruption is forced, heavy impact is caused to the power grid, and the risk of heavy power failure accidents is caused.
At present, a fire prevention and control research mechanism of a transformer builds a fire simulation test platform of a small transformer and researches a fire prevention and control technology of the transformer. The oil storage capacity of the insulating oil in the small transformer is relatively small, and the test cost and the environmental hazard are small. The large transformer is usually used for generating fire and causing great harm, hundreds of tons of insulating oil are contained in the transformer, if a true transformer is directly used for simulating a fire test, the test cost is high, the generated waste oil is extremely difficult to treat, and great threat is caused to the environment. Therefore, an environment-friendly large-scale transformer multi-fire type simulation method is urgently needed, a small amount of transformer oil is used for simulating multiple real fires, and a test basis is provided for fire extinguishing mode research.
Disclosure of Invention
In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides an environment-friendly transformer multi-fire type simulation system.
The utility model provides a many fire types of environment-friendly transformer analog system, includes:
a transformer housing with an internal coil removed;
the sleeve fire module, the overflow fire module and the spray fire module are all arranged in the transformer shell;
the oil tank, the oil injection pipeline and the pump set are arranged outside the transformer shell, and the pump set is used for providing power so as to inject oil in the oil tank into at least one of the sleeve fire module, the overflow fire module and the spray fire module through the oil injection pipeline;
the power supply is used for supplying power to at least one of the sleeve fire module, the overflow fire module and the spray fire module;
and the secondary control module is connected with the power supply, the pump set, the sleeve fire module, the overflow fire module and the spray fire module.
Optionally, the simulation system further comprises an oil collection pit, a main oil discharge pipe and a main oil discharge valve;
the main oil discharge pipe is communicated with the transformer shell through the main oil discharge valve; when the main oil drain valve is opened, the test waste oil in the transformer shell is discharged to the oil collection pit.
Optionally, the simulation system further comprises an oil-water inlet pipe and a multi-stage oil-water separation module;
the multistage oil-water separation module is communicated with the oil collecting pit through the oil-water inlet pipe;
the multi-stage oil-water separation module is used for separating test waste oil and test waste water stage by stage.
Optionally, the multistage oil-water separation module includes a plurality of waste oil ponds that communicate in proper order through the siphon, specifically: the first waste oil pool, the second waste oil pool, the third waste oil pool and the fourth waste oil pool are sequentially communicated;
in each waste oil pool, the distance between the bottom bell mouth of the siphon and the bottom of the waste oil pool is smaller than a preset distance.
Optionally, the bottom bell mouth is provided with a filter screen.
Optionally, the capacity of each waste oil pool is the same.
Optionally, the capacity of each waste oil pool is equal to or greater than 2 times of the sum of the capacity of the casing fire module, the capacity of the overflow fire module and the capacity of the spray fire module.
Optionally, the outlet end of the oil-water inlet pipe and the outlet end of the siphon pipe are the same in height, and the distance between each outlet end and the top of the waste oil tank is smaller than a preset distance.
Optionally, the pipe diameter of the oil-water inlet pipe and the pipe diameter of the siphon are both equal to or larger than a preset pipe diameter D;
the preset pipe diameter D satisfies:
wherein D is0Representing the pipe diameter of the main oil drainage pipe; dNA main pipe diameter representing the casing fire module, the spill fire module, and the fogging fire module.
Optionally, the casing fire module comprises a casing oil tank, a casing valve, a first auxiliary oil drain valve, a first heating resistor, a first temperature sensor and a first oil filling valve;
the sleeve is hollow and is communicated with the sleeve oil tank; arranging the sleeve valve at the end part of the sleeve far away from the sleeve oil tank; the first heating resistor and the first temperature sensor are both arranged in the sleeve oil tank;
the first oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the sleeve oil tank;
the first auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the sleeve oil tank to be discharged;
the sleeve valve, the first auxiliary oil discharge valve and the first oil injection valve are connected with the secondary control module, and the first heating resistor is connected with the power supply.
Optionally, the overflow fire module includes an overflow oil tank, an overflow valve, a second auxiliary oil drain valve, a second heating resistor, a second temperature sensor, and a second oil filling valve;
the overflow valve is arranged on the upper surface side of the overflow oil tank, and the second heating resistor and the second temperature sensor are both arranged in the overflow oil tank;
the second oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the overflow oil tank;
the second auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the overflow oil tank to be discharged;
the overflow valve, the second auxiliary oil discharge valve and the second oil injection valve are all connected with the secondary control module, and the second heating resistor is connected with the power supply.
Optionally, the spray fire module includes a spray oil tank, an oil mist nozzle, a third auxiliary oil drain valve, a third heating resistor, a third temperature sensor, and a third oil filling valve;
the oil mist spray head is arranged on the upper surface side of the spray oil tank, and the third heating resistor and the third temperature sensor are both arranged in the spray oil tank;
the third oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the spray oil tank;
the third auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the spray oil tank to be discharged;
the oil mist spray head, the third auxiliary oil discharge valve and the third oil injection valve are all connected with the secondary control module, and the third heating resistor is connected with the power supply.
Optionally, the pressure of the pump stack is equal to or less than 1.6 MPa.
Optionally, each path of control signal output by the secondary control module includes a switch control signal and a switch state signal.
Optionally, the power supply supplies power to at least one of the sleeve fire module, the flash fire module and the spray fire module through a signal cable.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the environment-friendly transformer multi-fire type simulation system provided by the embodiment of the disclosure, the sleeve fire module, the overflow fire module and the spray fire module are arranged in the transformer shell with the internal coil removed, oil is supplied to at least one of the sleeve fire module, the overflow fire module and the spray fire module by using the oil tank, the oil injection pipeline and the pump group, and the power supply is used for supplying power to at least one of the sleeve fire module, the overflow fire module and the spray fire module, so that various real transformer fires can be simulated, an experiment is carried out without filling oil in the whole transformer cavity, and the economic property and the environmental friendliness are favorably considered; meanwhile, the sleeve fire module, the overflow fire module and the spray fire module can be used for independently simulating one fire point and also can be used for simultaneously simulating three fire points, so that not only are the experimental working conditions rich, but also the waste caused by the condition that only a single fire source is needed is avoided; in addition, through the combination of the sleeve fire module, the overflow fire module and the spray fire module and the combination of oil supply and/or power supply, one type of fire can be simulated independently, the combination of various types of fire can be simulated simultaneously, various actual working conditions can be simulated, and the development of fire extinguishing tests and the research of fire prevention measures can be effectively guided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a simulation system according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a thimble fire module according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural view of an excess fire module according to an embodiment of the disclosure;
FIG. 4 is a schematic structural view of a fire spray module according to an embodiment of the present disclosure;
fig. 5 is a schematic connection diagram of a secondary control module according to an embodiment of the disclosure;
FIG. 6 is a schematic structural diagram of a multi-stage oil-water separation module according to an embodiment of the disclosure;
FIG. 7 is a schematic structural diagram of another multi-stage oil-water separation module according to an embodiment of the disclosure.
1, a transformer shell; 101. a main oil drain pipe; 102. a main drain valve; 103. a base; 2. a transformer base; 3. an oil collection pit; 4. a casing fire module; 401. a sleeve oil tank; 402. A sleeve; 403. a first auxiliary oil drain valve; 404. a first heating resistor; 405. a first temperature sensor; 406. a first fill valve; 5. an overflow fire module; 501. an overflow oil tank; 502. an overflow valve; 503. a second auxiliary oil drain valve; 504. a second heating resistor; 505. a second temperature sensor; 506. a second fill valve; 6. a spray fire module; 601. a spray oil tank; 602. an oil mist spray head; 603. a third auxiliary oil drain valve; 604. a third heating resistor; 606. a third temperature sensor; 606. a third fill valve; 7. a pump group; 8. an oil tank; 9. an oil injection pipeline; 10. a power supply source; 11. a signal cable; 12. a secondary control module; 13. an oil-water inlet pipe; 14. a first waste oil sump; 15. a second waste oil sump; 16 third waste oil pool; 17. a fourth waste oil sump; 18. a siphon tube.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
In the simulation system provided by the embodiment of the disclosure, the sleeve fire module, the overflow fire module and the spray fire module are respectively used for simulating 3 fire types of sleeve fire, overflow fire and spray fire of a real transformer fire and can be called as a test module or a fire simulation module. Wherein, each test module can independently carry out the simulation of a fire point, also can carry out the simulation of a plurality of fire points. By arranging the fire simulation module in the transformer shell with the internal coil removed, the whole transformer cavity does not need to be filled with insulating oil to carry out a test, so that the test oil is saved; meanwhile, through the combination of the test modules, the simulation of one fire type can be independently carried out, and the combination of multiple fire types can also be simulated at the same time. The transformer oil is heated through the built-in heating resistor of the test module, and the high-temperature transformer oil in real operation is simulated. Waste oil and waste water are separated through the combined oil-water separation module, the construction cost of the original large waste oil pool can be greatly reduced, insulating oil is prevented from being discharged to the natural environment, and the economy and the environmental friendliness are good.
The simulation system provided by the embodiments of the present disclosure is exemplified below in conjunction with fig. 1-7.
Fig. 1 is a schematic structural diagram of a simulation system according to an embodiment of the present disclosure, fig. 2 is a schematic structural diagram of a sleeve fire module according to an embodiment of the present disclosure, fig. 3 is a schematic structural diagram of an overflow fire module according to an embodiment of the present disclosure, fig. 4 is a schematic structural diagram of a spray fire module according to an embodiment of the present disclosure, and fig. 5 is a schematic connection relationship diagram of a secondary control module according to an embodiment of the present disclosure. Referring to fig. 1 to 5, the environmental protection type transformer multi-fire simulation system includes: a transformer housing 1 with an internal coil removed; the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 are all arranged in the transformer shell 1; the oil tank 8, the oil injection pipeline 9 and the pump set 7 are all arranged outside the transformer shell 1, and the pump set 7 is used for providing power so as to inject oil in the oil tank 8 into at least one of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 through the oil injection pipeline 9; the power supply 10 is used for supplying power to at least one of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6; and the secondary control module 12 is connected with the power supply 10, the pump set 7, the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6.
The transformer housing 1 may be an outer housing of a true large transformer with an internal coil removed. Illustratively, the true large transformer can adopt a 220kV oil-immersed step-up transformer scrapped by a certain company, and the main body size of the true large transformer is about 12m multiplied by 5m multiplied by 4 m; after the internal insulating oil is drained, the structures such as the internal coil and the iron core are removed, and only the cavity shell is left to prepare for simulating fire.
The sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 which are arranged in the transformer shell 1 are respectively used for simulating sleeve fire, overflow fire and spray fire of a real transformer fire; the oil tank 8, the oil filling pipeline 9 and the pump group 7 can supply oil to the three test modules, and the power supply 10 can supply power to the three test modules, so that fire simulation under different working conditions can be realized.
According to the environment-friendly transformer multi-fire type simulation system provided by the embodiment of the disclosure, the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 are arranged in the transformer shell 1 with the internal coil removed, oil is supplied to at least one of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 by using the oil tank 8, the oil injection pipeline 9 and the pump group 7, and power is supplied to at least one of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 by using the power supply 10, so that various real transformer fires can be simulated, an experiment is carried out without filling oil in the whole transformer cavity, and the economic property and the environmental friendliness are favorably considered; meanwhile, the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 can independently simulate one fire point and can simultaneously simulate three fire points, so that the experimental working conditions are rich, and the waste caused by only needing a single fire source is avoided; in addition, through the combination of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6, and the arrangement of oil supply and/or power supply, one type of fire can be simulated independently, the combination of multiple types of fire can be simulated simultaneously, multiple actual working conditions can be simulated, and the development of fire extinguishing tests and the research of fire prevention measures can be effectively guided.
In an embodiment, the simulation system further comprises an oil collection pit 3, a main oil drain pipe 101 and a main oil drain valve 102; the main oil drain pipe 101 is communicated with the transformer shell 1 through a main oil drain valve 102; when the main oil drain valve 102 is opened, the test waste oil in the transformer case 1 is discharged to the oil collection pit 3.
The main oil discharge pipe 101 and the main oil discharge valve 102 are used for discharging test waste oil, the base 103 is installed on the transformer base 2, and the transformer base 2 is located in the oil collection pit 3. Therefore, the test waste oil and the test waste water are convenient to discharge, and the oil collecting pit 3 is used for collecting the test waste oil and the test waste water so as to carry out subsequent treatment.
In one embodiment, the simulation system further comprises an oil-water inlet pipe 13 and a multi-stage oil-water separation module; the multi-stage oil-water separation module is communicated with the oil collection pit 3 through an oil-water inlet pipe 13; the multistage oil-water separation module is used for separating test waste oil and test waste water step by step.
Fig. 6 is a schematic structural diagram of a multistage oil-water separation module according to an embodiment of the present disclosure, and fig. 7 is a schematic structural diagram of another multistage oil-water separation module according to an embodiment of the present disclosure. On the basis of fig. 1, with reference to fig. 6 and 7, the simulation system may further include a drainage system including a main oil drain valve 102 for removing impurities such as waste oil generated during the test, waste water during the fire extinguishing process, and fire extinguishing medium. Because the insulating oil pollutes the environment and is difficult to degrade, a special treatment mechanism is needed for treatment, and oil-water separation treatment is needed before removal.
Above-mentioned setting can realize the thorough separation of experimental waste oil and experimental waste water to be convenient for carry out subsequent processing respectively with experimental waste oil and experimental waste water, be favorable to avoiding remaining insulating oil to discharge, thereby be favorable to the environmental protection.
In an embodiment, with continued reference to fig. 6, the multistage oil-water separation module comprises a plurality of waste oil sumps in communication in sequence by a siphon 18, specifically: a first waste oil tank 14, a second waste oil tank 15, a third waste oil tank 16 and a fourth waste oil tank 17 which are communicated in sequence; in each waste oil pool, the distance between the bottom bell mouth of the siphon 18 and the bottom of the waste oil pool is smaller than the preset distance.
Wherein, the oil-water separation module is formed by connecting a plurality of waste oil pools in series. Wherein, the inlet end of the oil-water inlet pipe 13 is connected with the oil discharge port of the oil collecting pit 3, the outlet end is connected with the first waste oil pool 14, the waste oil pools are connected through the siphon 18, and finally, the water obtained after separation is discharged through the siphon of the fourth waste oil pool 17.
Wherein, the distance is predetermine and the bottom horn mouth is made and is close to the bottom in waste oil pond as far as possible to be convenient for leave experimental waste oil, two take out experimental waste water.
In one embodiment, the bottom bell mouth is provided with a filter screen.
So set up, can prevent that the pipeline from blockking up.
In one embodiment, the volumes of the waste oil pools are the same.
So set up, can make the design and the construction of waste oil pool simpler.
In one embodiment, the capacity of each waste oil sump is equal to or greater than 2 times the sum of the capacity of the casing fire module 4, the capacity of the spill fire module 5 and the capacity of the spray fire module 6.
So, each waste oil pond all has great capacity, is convenient for realize experimental waste oil and experimental waste water's abundant separation.
In one embodiment, the outlet ends of the oil-water inlet pipe 13 and the siphon pipe 18 have the same height, and the distance between each outlet end and the top of the waste oil tank is smaller than the preset distance.
So set up, can make the exit end be close to the top of waste oil pool as far as possible to be convenient for make great space in the waste oil pool utilized, thereby realize the make full use of waste oil pool inner space.
In one embodiment, the pipe diameter of the oil-water inlet pipe 13 and the pipe diameter of the siphon 18 are both equal to or greater than a preset pipe diameter D; the preset pipe diameter D satisfies:
wherein D is0Represents the pipe diameter of the main oil drain pipe 101; dNRepresenting the main pipe diameters of the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6.
Thus, the maximum flow oil discharge of the main oil discharge pipe 101 and the water discharge requirement under the maximum flow fire extinguishing condition of the whole simulation system can be met.
On the basis of the above embodiment, for example, for the whole oil-water separation module, the inlet end of the oil-water inlet pipe 13 is connected to the oil discharge port of the oil collection pit 3, the outlet end is connected to the first waste oil pool 14, and the second waste oil pool 15, the third waste oil pool 16 and the fourth waste oil pool 17 are connected by the siphon pipe 18 and finally discharged through the siphon pipe of the waste oil pool 17.
Illustratively, each waste oil pool volume is not less than (3 × 0.5 × 0.5) × 3 × 2 ═ 4.5m3For the sake of safety and to reduce the number of waste oil pools as much as possible, the volume of a single waste oil pool is 12m in this embodiment3The size is 2m × 2m × 3m, and the number is 4. In other embodiments, the number of the waste oil pools may also be other numbers, for example, n is shown in fig. 7, where n is a positive integer, and the embodiment of the present disclosure is not limited thereto.
Exemplarily, the pipe diameter of the main pipe of the surrounding water spray fire extinguishing system is DN150, the pipe diameter of the main pipe of the water mist fire extinguishing system is DN80, the pipe diameter of the main oil drain pipe 101 is DN100, and the maximum drainage equivalent pipe diameter D of the total folded fire extinguishing system is:
in order to ensure that the pipe diameters of the oil-water inlet pipe 13 and the siphon 18 meet the drainage requirements under the conditions of maximum flow oil discharge of the main oil discharge pipe 101 and maximum flow fire extinguishing of the whole simulation system, the pipe diameters of the oil-water inlet pipe 13 and the siphon 18 are not less than 197.2mm and can be taken as 200 mm.
Illustratively, the bell mouth at the bottom of the siphon 18 is as close to the bottom of the waste oil tank as possible, and the distance from the bell mouth to the bottom of the waste oil tank in the embodiment can be 10 cm; and the bell mouth at the bottom is provided with a filter screen, so that the pipeline can be prevented from being blocked; the outlet end of the oil-water inlet pipe 13 is in the same level with the outlet end of the siphon 18, and the distance from the outlet end of the oil-water inlet pipe to the top end of the waste oil pool can be 10 centimeters.
In other embodiments, the above numerical range may also be set according to the requirement of the simulation system, which is not limited in the embodiments of the present disclosure.
In addition, after the test is completed, the insulating oil in the waste oil tanks at all levels needs to be pumped away to a professional processing device for processing, so that the environment pollution caused by the discharge of the residual insulating oil is avoided.
In an embodiment, with continued reference to fig. 2, the casing fire module 4 includes a casing tank 401, a casing 402, a casing valve 407, a first auxiliary oil drain valve 403, a first heating resistor 404, a first temperature sensor 405, and a first fill valve 406; the sleeve 402 is hollow and is communicated with the sleeve oil tank 401; the end of the thimble 402 remote from the thimble tank 401 is provided with a thimble valve 407; the first heating resistor 404 and the first temperature sensor 405 are both arranged in the sleeve oil tank 401; a first fill valve 406 is in communication with the fill line 9 for allowing oil to fill the casing tank 401; the first auxiliary oil discharge valve 403 is communicated with the main oil discharge valve 102 through the main oil discharge pipe 101, and is used for allowing waste oil in the sleeve oil tank 401 to be discharged; the sleeve valve 407, the first auxiliary oil discharge valve 403 and the first oil filling valve 406 are all connected with the secondary control module 12, and the first heating resistor 404 is connected with the power supply 10.
For example, the thimble oil tank 401 may be configured in a cubic shape, with dimensions of 3m × 1m × 1m, and made of 304 stainless steel; the sleeve 402 can adopt 3 original high-voltage sleeves, is modified into a hollow shape and is communicated with the sleeve oil tank 401, and the top of the sleeve 402 is provided with a sleeve valve 407; the first auxiliary oil drain valve 403 is arranged at the bottom of the casing oil tank 401, and the caliber of the first auxiliary oil drain valve can be DN 100; the first heating resistor 404 can be transversely arranged and consists of 2 resistance wires, the heating power of each resistance wire can be 12kW, and the total heating power of the first heating resistor 404 is 24 kW; the first temperature sensor 405 is arranged on the inner wall of the sleeve oil tank 401, and the temperature measuring range can be-20-200 ℃; a first fill valve 406 is located on the side of the quill tank 401 and is connected to the fill line 9 and has a gauge DN 50.
Based on this, when carrying out the sleeve pipe fire extinguishing experiment, close first supplementary oil drain valve 403 before the experiment begins, open 1 ~ 3 sleeve pipe valves 407 according to the experiment demand to inside the oil injection of casing oil tank 401, until oil spills over from sleeve pipe 402, utilize petrol to ignite insulating oil this moment, then can simulate the sleeve pipe fire of actual transformer. And then, carrying out fire extinguishing tests by using fixed fire extinguishing devices (such as water spray, water mist, foam fire extinguishing systems and the like) or movable fire extinguishing devices (such as elevating fire trucks, water cannon fire trucks and the like) built around the transformer. After the test is finished, the first auxiliary oil discharge valve 403 is opened to discharge the waste oil, and the sleeve valve 407 at the top of the sleeve 402 is closed to prevent rainwater or foreign matters from entering.
In other embodiments, the number of the sleeves 402 may also be 6, 9 or more, and may be set according to the requirement of the simulation system, which is not limited by the embodiment of the present disclosure.
In one embodiment, with continued reference to FIG. 3, the excess fire module 5 includes an excess oil tank 501, an excess valve 502, a second auxiliary drain valve 503, a second heating resistor 504, a second temperature sensor 505, and a second fill valve 506; overflow valve 502 is disposed on the upper surface side of overflow oil tank 501, and second heating resistor 504 and second temperature sensor 505 are both disposed in overflow oil tank 501; a second fill valve 506 is in communication with the fill line 9 for allowing oil to fill the overflow tank 501; the second auxiliary oil discharge valve 503 is communicated with the main oil discharge valve 102 through the main oil discharge pipe 101 and is used for allowing waste oil in the overflow oil tank 501 to be discharged; the overflow valve 502, the second auxiliary oil discharge valve 503 and the second oil filling valve 506 are all connected with the secondary control module 12, and the second heating resistor 504 is connected with the power supply 10.
Illustratively, the overflow oil tank 501 may be configured in a cubic shape, with dimensions of 3m × 1m × 1m, and made of 304 stainless steel; 3 overflow valves 502 with the caliber DN150 are arranged on the upper surface of the overflow oil tank 501 and made of a burning-resistant material; the second auxiliary oil drain valve 503 is arranged at the bottom of the overflow oil tank 501, and the caliber is DN 100; the second heating resistor 504 is transversely arranged and consists of 2 resistance wires, the heating power of each resistance wire is 12kW, and the total heating power of the second heating resistor 504 is 24 kW; the second temperature sensor 505 can be arranged on the inner wall of the sleeve oil tank 501, and the temperature measuring range can be-20-200 ℃; a second fill valve 406 may be located on the side of the quill tank 501 and in communication with the fill line 9 and having a gauge DN 50.
Based on this, when carrying out the fire extinguishing test of excessive fire, close second auxiliary oil drain valve 503 before the experiment begins, open 1 ~ 3 overflow valves 502 according to the experiment demand to fill oil to overflow oil tank 501 inside, until oil overflows from overflow valve 502, utilize petrol to ignite insulating oil at this moment, then can simulate the sagging fire that actual transformer ware body was on fire. And then, carrying out fire extinguishing tests by using fixed fire extinguishing devices (such as water spray, water mist, foam fire extinguishing systems and the like) or movable fire extinguishing devices (such as elevating fire trucks, water cannon fire trucks and the like) built around the transformer. After the test is finished, the second auxiliary oil discharge valve 503 is opened to discharge the waste oil, and the overflow valve 502 is closed to prevent rainwater or foreign matters from entering.
In other embodiments, the number of relief valves 502 may also be 6, 9, or more, and may be set according to the requirement of the simulation system, which is not limited in the embodiment of the present disclosure.
In one embodiment, with continued reference to FIG. 4, the spray fire module 6 includes a spray tank 601, an oil mist spray head 602, a third auxiliary oil drain valve 603, a third heating resistor 604, a third temperature sensor 605, and a third fill valve 606; the oil mist spray head 602 is arranged on the upper surface side of the oil mist tank 601, and the third heating resistor 604 and the third temperature sensor 605 are both arranged in the oil mist tank 601; a third fill valve 606 communicates with the fill line 9 for allowing oil to be filled into the spray tank 601; the third auxiliary oil discharge valve 603 is communicated with the main oil discharge valve 102 through the main oil discharge pipe 101 and is used for allowing waste oil in the spray oil tank 601 to be discharged; the oil mist spray head 602, the third auxiliary oil discharge valve 603 and the third oil filling valve 606 are all connected with the secondary control module, and the third heating resistor 604 is connected with the power supply 10.
Illustratively, the spray tank 601 may be configured in a cubic shape with dimensions of 3m × 0.5m × 0.5m and is made of 304 stainless steel; the 3 oil mist nozzles 602 are fire department certified water nozzles with models of ZSTVB 43/120, ZSTVB 34/90 and ZSTVB 10/60, flow rates of 96L/min, 96L/min and 28L/min, and atomization angles of 120 degrees, 90 degrees and 60 degrees. A galvanized steel pipe with the pipe diameter DN25 is connected with a nozzle valve and a spraying oil tank 601 and is used for simulating 3 kinds of oil mist fire with different spraying strengths. The oil discharge valve 603 is arranged at the bottom of the spray oil tank 601, and the caliber is DN 100; the third heating resistor 604 is transversely arranged and consists of 2 resistance wires, the heating power of each resistance wire is 12kW, and the total power of the third heating resistor is 24 kW; the third temperature sensor 605 is arranged on the inner wall of the casing oil tank 601, and the temperature measuring range can be-20-200 ℃; a third fill valve 606 is located on the side of the quill tank 601 and is connected to the fill line 9 and is of gauge DN 50.
Based on this, when the spray fire test is performed, the third auxiliary oil drain valve 603 is closed before the test is started, the valves of 1 to 3 oil mist nozzles 602 are opened according to the test requirements, and oil is injected into the spray oil tank 601 until the oil mist is sprayed out of the oil mist nozzles 602. The oil mist is ignited, and the oil mist fire condition of the actual transformer can be simulated. And then, carrying out fire extinguishing tests by using fixed fire extinguishing devices (such as water spray, water mist, foam fire extinguishing systems and the like) or movable fire extinguishing devices (such as elevating fire trucks, water cannon fire trucks and the like) built around the transformer. After the test is finished, the third auxiliary oil discharge valve 603 is opened to discharge the waste oil, and the valve of the oil mist spray head 602 is closed to prevent rainwater or foreign matters from entering.
In other embodiments, the number of the oil mist nozzles 602 may also be 6, 9 or more, and may be set according to the requirements of the simulation system, which is not limited in the embodiment of the present disclosure.
The 3 test modules can be used for carrying out tests independently and can also be used for simulating various fires; each test module can independently conduct the simulation of one fire point, and can also conduct the simulation of 3 fire points simultaneously, and the embodiment of the disclosure is not limited to this.
Secondly, the three test modules are all internally provided with heating resistors so as to heat the test transformer oil (namely the insulating oil) to the temperature which is the same as the actual working condition.
Illustratively, the power supply 10 supplies power to the heating resistors 404, 504 and 604 in the 3 fire simulation modules via the signal cables 11; and heating the oil to a specified temperature according to test requirements.
Wherein, the power supply 10 can be a 380V power supply, and under the rated power of the heating resistor 504, the oil in each module oil tank needs about 8min to be heated from 25 ℃ to 150 ℃.
In one embodiment, the pressure of the pump unit 7 is equal to or less than 1.6 MPa.
Illustratively, the pump unit 7 is a low-pressure oil pump unit, the working pressure is 0.6-1.2 Mpa, the rated flow is 250L/min, and insulating oil at normal temperature can be injected into 3 fire simulation modules from an oil tank 8 through an oil injection pipeline 9.
In one embodiment, with continued reference to fig. 5, the dashed lines in fig. 5 are used to demarcate the side views from different viewing angles, and each control signal output by the secondary control module 12 includes a switch control signal and a switch status signal.
Illustratively, the secondary control module 12 is connected to all of the control valves via a fire-resistant secondary signal cable 11, which may be of the type NH-KVVP 2/22-4X 1.5.
Signals of the oil discharge valves 403, 503 and 603 of each test module are transmitted through three signal lines A-1, A-2 and A-3 respectively; valve signals of the sleeve valve 407, the overflow valve 502 and the oil mist spray head 602 are transmitted by three signals B-1, B-2 and B-3 respectively; signals of the oiling valves 406, 506 and 606 of each test module are transmitted through three signal lines C-1, C-2 and C-3 respectively; the signal of the transformer drain valve, i.e., the main drain valve 102, is transmitted through a signal line E. Signals of the temperature sensors 405, 505 and 605 of each test module are transmitted through three signal lines of D-1, D-2 and D-3, and the temperature of the insulating oil is fed back. Power supply signals of the heating resistors 404, 504 and 604 of each test module are transmitted through three signal lines P-1, P-2 and P-3, and each signal comprises a power supply control and power supply state 2 group signal.
Specifically, each path of valve signal comprises 2 groups of signals of valve opening and closing control and valve opening and closing states; each power supply control signal, namely the control signals on the P-1, P-2 and P-3 signal lines comprise power supply control and power supply state 2 group signals; the control signals are mutually independent to realize independent control.
In one embodiment, power supply 10 provides power to at least one of sleeve fire module 4, spill fire module 5, and aerosol fire module 6 via signal cable 11.
Wherein, the heating resistor in each test module all is connected with power supply electricity to the realization is to insulating oil heating.
In the simulation system provided by the embodiment of the disclosure, the sleeve fire module 4, the overflow fire module 5 and the spray fire module 6 are respectively used for simulating 3 fire types of sleeve fire, overflow fire and spray fire of a real transformer fire. Wherein, each test module can independently carry out the simulation of one fire point and can also carry out the simulation of a plurality of fire points; by arranging the fire simulation module in the transformer shell with the internal coil removed, modularized fire simulation can be tested, and the whole transformer cavity does not need to be filled with insulating oil to carry out a test, so that test oil is saved; meanwhile, through the combination of the test modules, the simulation of one fire type can be independently carried out, and the combination of multiple fire types can be simulated simultaneously. The transformer oil is heated through the built-in heating resistor of the test module, and the high-temperature transformer oil in the real working condition is simulated. Waste oil and waste water are separated through the combined oil-water separation module, the construction cost of the original large waste oil pool can be greatly reduced, insulating oil is prevented from being discharged to the natural environment, and the economy and the environmental friendliness are good.
It is noted that, herein, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other elements in the process, method, article, or apparatus that comprise the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. The utility model provides an environment-friendly transformer fire type analog system that many wherein, includes:
a transformer housing with an internal coil removed;
the sleeve fire module, the overflow fire module and the spray fire module are all arranged in the transformer shell;
the oil tank, the oil injection pipeline and the pump set are arranged outside the transformer shell, and the pump set is used for providing power so as to inject oil in the oil tank into at least one of the sleeve fire module, the overflow fire module and the spray fire module through the oil injection pipeline;
the power supply is used for supplying power to at least one of the sleeve fire module, the overflow fire module and the spray fire module;
and the secondary control module is connected with the power supply, the pump set, the sleeve fire module, the overflow fire module and the spray fire module.
2. The simulation system of claim 1, further comprising an oil collection sump, a main drain pipe, and a main drain valve;
the main oil discharge pipe is communicated with the transformer shell through the main oil discharge valve; when the main oil discharge valve is opened, the test waste oil in the transformer shell is discharged to the oil collection pit.
3. The simulation system of claim 2, further comprising an oil-water inlet pipe and a multi-stage oil-water separation module;
the multistage oil-water separation module is communicated with the oil collecting pit through the oil-water inlet pipe;
the multi-stage oil-water separation module is used for separating test waste oil and test waste water stage by stage.
4. Simulation system according to claim 3, wherein the multistage oil-water separation module comprises a plurality of waste oil sumps in communication in sequence through siphons, in particular: the first waste oil pool, the second waste oil pool, the third waste oil pool and the fourth waste oil pool are sequentially communicated;
in each waste oil pool, the distance between the bottom bell mouth of the siphon and the bottom of the waste oil pool is smaller than a preset distance.
5. The simulation system of claim 4, wherein the bottom bell mouth is provided with a filter screen.
6. The simulation system of claim 4, wherein the volumes of the respective sumps are the same size.
7. The simulation system of claim 4, wherein the capacity of each sump is equal to or greater than 2 times the sum of the capacity of the thimble fire module, the capacity of the spill fire module, and the capacity of the spray fire module.
8. The simulation system of claim 4, wherein the outlet ends of the oil-water inlet pipe and the siphon pipe are at the same height, and the distance between each outlet end and the top of the waste oil tank is smaller than a preset distance.
9. The simulation system of claim 4, wherein the pipe diameter of the oil-water inlet pipe and the pipe diameter of the siphon pipe are both equal to or larger than a preset pipe diameter D;
the preset pipe diameter D satisfies:
wherein D is0Representing the pipe diameter of the main oil drainage pipe; dNA main pipe diameter representing the casing fire module, the overflow fire module and the spray fire module.
10. The simulation system of claim 2, wherein the casing fire module comprises a casing tank, a casing valve, a first auxiliary oil drain valve, a first heating resistor, a first temperature sensor, and a first oil fill valve;
the sleeve is hollow and is communicated with the sleeve oil tank; arranging the sleeve valve at the end of the sleeve far away from the sleeve oil tank; the first heating resistor and the first temperature sensor are both arranged in the sleeve oil tank;
the first oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the sleeve oil tank;
the first auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the sleeve oil tank to be discharged;
the sleeve valve, first auxiliary oil drain valve and first oiling valve all with secondary control module links to each other, first heating resistor with power supply links to each other.
11. The simulation system of claim 2, wherein the excess flow fire module comprises an excess flow tank, an excess flow valve, a second auxiliary oil drain valve, a second heating resistor, a second temperature sensor, and a second fill valve;
the overflow valve is arranged on the upper surface side of the overflow oil tank, and the second heating resistor and the second temperature sensor are both arranged in the overflow oil tank;
the second oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the overflow oil tank;
the second auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the overflow oil tank to be discharged;
the overflow valve, the second auxiliary oil discharge valve and the second oil injection valve are all connected with the secondary control module, and the second heating resistor is connected with the power supply.
12. The simulation system of claim 2, wherein the spray fire module comprises a spray oil tank, an oil mist spray head, a third auxiliary oil drain valve, a third heating resistor, a third temperature sensor, and a third oil fill valve;
the oil mist spray head is arranged on the upper surface side of the spray oil tank, and the third heating resistor and the third temperature sensor are both arranged in the spray oil tank;
the third oil filling valve is communicated with the oil filling pipeline and is used for allowing oil to be filled into the spray oil tank;
the third auxiliary oil discharge valve is communicated with the main oil discharge valve through the main oil discharge pipe and is used for allowing waste oil in the spray oil tank to be discharged;
the oil mist spray head, the third auxiliary oil discharge valve and the third oil injection valve are all connected with the secondary control module, and the third heating resistor is connected with the power supply.
13. Simulation system according to claim 1, wherein the pressure of the pump stack is equal to or less than 1.6 MPa.
14. The simulation system of claim 1, wherein each control signal output by the secondary control module comprises a switch control signal and a switch state signal.
15. The simulation system of claim 1, wherein the power supply supplies power to at least one of the sleeve fire module, the spill fire module, and the smoldering fire module via a signal cable.
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| CN115192951A (en) * | 2022-06-23 | 2022-10-18 | 国网安徽省电力有限公司电力科学研究院 | Dry powder and water or foam spray fire extinguishing system combined test platform and test method |
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| CN112121350B (en) | 2022-08-05 |
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