Fire extinguishing test model and method for high efficient fire extinguishing facility of ultra-high voltage transformer

Abstract

The application discloses a high-voltage transformer high-efficiency fire extinguishing facility fire extinguishing test model, which comprises a transformer model, a fan assembly capable of changing the wind direction and the wind volume, an opening adjusting mechanism and a fire extinguishing assembly; the fire extinguishing assembly is located at the periphery of the transformer model, the fan assembly is located at one side of the transformer model, the transformer model is provided with a through hole, and the opening adjusting mechanism is connected to the transformer model and can adjust the shielding of the through hole. The application further discloses a high-voltage transformer high-efficiency fire extinguishing facility fire extinguishing test method. The application has the beneficial effects that the real fire condition can be simulated, the actual fire extinguishing condition of the fire extinguishing assembly can be evaluated, the fire extinguishing simulation under the real condition has important significance, and the occurrence of safety hazards can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fire fighting technology, in particular, to a high-voltage transformer efficient fire extinguishing facility fire extinguishing test model and method. BACKGROUND

[0002] With the development of economy, people's life is getting better and better, with the growth of people's daily life and industrial electricity, the ultra-high voltage transformer is one of the core equipment of the ultra-high voltage transformer substation, and the application of the ultra-high voltage transformer is more and more, the ultra-high voltage transformer has the characteristics of large size, large oil storage, concentrated arrangement, high equipment cost and so on. If the ultra-high voltage transformer catches fire, it will seriously affect the safe operation of the power grid, and the main transformer body will tear and the oil will flow out, which will quickly form a three-dimensional fire, thereby greatly increasing the difficulty and uncertainty of fire extinguishing. Under this environment, once a fire breaks out, it will cause incalculable loss, therefore, by establishing a corresponding fire extinguishing model, the fire situation can be effectively simulated.

[0003] Such as the existing publication number: CN110992803A, oil-immersed transformer fire model and fire simulation method, by strictly simulating the various fire conditions that may occur when the transformer entity catches fire, the oil-immersed transformer fire model can accurately simulate the real situation when the oil-immersed transformer catches fire; and, by using the oil-immersed transformer fire model to simulate the fire, it provides a strong guarantee for verifying the effectiveness of various fire extinguishing systems in extinguishing oil-immersed transformer fires.

[0004] However, the above-mentioned patent and existing model cannot simulate the change of air volume, and cannot accurately simulate the scene when the transformer produces cracks. The transformer explosion is generally in the state of explosion, that is, the local pressure is too large to produce cracks and then explode. In the real fire scene, the external air volume and wind direction have a great influence on the size and trend of the fire. Therefore, a high-voltage transformer efficient fire extinguishing facility fire extinguishing test model and method are needed. The model can simulate the real fire situation more realistically, so as to evaluate the actual fire extinguishing situation.

[0005] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the application and should not be regarded as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0006] The technical problem to be solved by the present application is how to solve the problem that in the current fire simulation test, the change of air volume and the situation of transformer crack are not simulated, and the obtained fire situation is not real enough, which affects the evaluation of the actual fire extinguishing situation.

[0007] The present application solves the above technical problems by the following technical means:

[0008] The high-efficiency fire extinguishing facility fire extinguishing test model of an extra-high voltage transformer comprises a transformer model, a fan assembly capable of changing the wind direction and wind volume, an opening adjusting mechanism, and a fire extinguishing assembly; the fire extinguishing assembly is located at the periphery of the transformer model, the fan assembly is located at one side of the transformer model, the transformer model is provided with a through hole, and the opening adjusting mechanism is connected to the transformer model and can adjust the shielding of the through hole.

[0009] The present application can simulate the effect of different wind volumes and angles by simulating the wind force and the size of the wind force blown by the fan assembly from different angles to the transformer model; the opening adjusting mechanism can simulate the situation that different cracks and openings are burned on the outer surface of the transformer model when a fire occurs on the transformer model, so that the real fire situation can be simulated more realistically by the model, and the actual fire extinguishing situation of the fire extinguishing assembly can be evaluated.

[0010] Preferably, the fan assembly comprises a fan bracket, a connecting piece, a clamping mechanism, and a fan body; the top end of the fan bracket is connected to the connecting piece; the two ends of the fan body are rotatably connected to the connecting piece; one end of the clamping mechanism is connected to the connecting piece; and the other end of the clamping mechanism can be connected to or separated from the fan body in different angle states.

[0011] Preferably, the clamping mechanism comprises a connecting cylinder and a plug shaft; the fan body is provided with a plurality of ring-shaped insertion holes; the connecting cylinder is connected to the connecting piece; and the plug shaft penetrates through the connecting cylinder from the outside of one end of the connecting cylinder and can be inserted into the insertion hole after extending out from the other end.

[0012] Preferably, the clamping mechanism further comprises a limiting ring and an elastic piece; the limiting ring is fixedly connected to the outside of the plug shaft and located in the inside of the connecting cylinder; and the two ends of the elastic piece abut against the inner end face of the connecting cylinder away from the insertion hole and the end face of the limiting ring away from the insertion hole, respectively.

[0013] Preferably, the insertion holes are arranged along the circumference of the connecting piece.

[0014] After the plug shaft is pulled out, the plug shaft is separated from the insertion hole, the fan body is rotated, the next insertion hole is coaxially corresponding to the plug shaft, and then the plug shaft is inserted into the insertion hole, so as to fix the fan body; and the stability of the plug shaft inserted into the insertion hole is maintained by the elastic piece and the limiting ring; the present application adjusts the rotation angle of the fan body by a simple structure, so as to adjust the different wind directions.

[0015] Preferably, the top surface and the side surface of the transformer model are provided with through holes, and the opening adjusting mechanism is slidably connected to the top surface and the side surface of the transformer model and located outside the through holes.

[0016] Preferably, guide rails are arranged on the outer surface of the transformer model and on both sides of the through holes, and the opening adjusting mechanism comprises a sliding plate, a lead screw and a motor, the sliding plate is slidably connected to the guide rails at two sides, the end of the sliding plate is connected to the lead screw, and the lead screw is connected to the motor.

[0017] The sliding plate is driven by the motor to slide on the guide rails, different parts of the through holes are shielded by the sliding plate, different sizes of cracks on the upper end and one side of the transformer model are simulated, different cracks and openings on the outer surface of the transformer model are simulated when a fire occurs, and the real fire situation is simulated by the model more realistically, and the structure has a simple and reliable adjusting mode.

[0018] Preferably, the fire-fighting assembly comprises a fire wall, a fire-fighting pipeline, a fire-fighting nozzle, a supply pipe and a fire-fighting gun, the fire wall is located outside the transformer model, the fire-fighting pipeline is connected to the supply pipe on the fire wall, the fire-fighting nozzle is connected to the fire-fighting pipeline, and the fire-fighting gun is connected to the supply pipe.

[0019] In the application, the fire wall, the fire-fighting pipeline, the fire-fighting nozzle, the supply pipe and the fire-fighting gun can all realize fire extinguishing, the positions and layouts of the fire wall, the fire-fighting pipeline, the fire-fighting nozzle, the supply pipe and the fire-fighting gun can be adjusted according to the fire extinguishing capacity obtained by the test, and the cooling time of the transformer model is obtained by arranging a cooling fan on the outer surface of the transformer model.

[0020] Preferably, the transformer model is placed on the ground, and an oil seepage belt and an oil collecting disc are arranged on the ground outside the transformer model.

[0021] The application further discloses a method for testing the fire extinguishing facility of the ultra-high voltage transformer, which comprises the following steps: placing flammable materials on the outer surface of the transformer model and igniting the flammable materials; extinguishing the fire in the fire area by the fire-fighting assembly; shielding the through holes by the opening adjusting mechanism to form openings of different sizes, so as to simulate cracks of different sizes on the outer surface of the transformer model; changing the wind direction and the wind volume of the fan assembly, so as to simulate the fire situation of the transformer model under different wind directions and wind volumes; and recording various parameters and evaluating the fire extinguishing capacity.

[0022] The application has the following advantages:

[0023] (1) This invention simulates the wind force and wind magnitude of the fan assembly blowing towards the transformer model from different angles, thereby simulating the effect of wind blowing at different wind magnitudes and angles through the model; it can also simulate the situation where different cracks and openings are burned on the outer surface of the transformer model when a fire occurs through the opening adjustment mechanism, thereby more realistically simulating the real fire situation through the model, thus simulating the real fire situation and evaluating the actual fire extinguishing performance of the fire-fighting components;

[0024] (2) After the insert shaft is pulled out, it is disengaged from the socket. The fan body is rotated so that the next socket is coaxial with the insert shaft. Then the insert shaft is inserted into the socket to fix the fan body. The elastic element and the limiting ring maintain the stability of the insert shaft after it is inserted into the socket. The present invention achieves the adjustment of the rotation angle of the fan body through a simple structure, thereby achieving the adjustment of different wind directions.

[0025] (3) The sliding plate is moved on the guide rail by the motor driving the lead screw. The sliding plate blocks different parts of the through opening, thus simulating the situation where different crack opening sizes are formed on the upper end and one side of the transformer model. This can simulate the situation where different cracks and openings are burned on the outer surface of the transformer model when a fire occurs, thus simulating the real fire situation more realistically through the model. The adjustment method of this structure is simple and reliable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the fire extinguishing test model of the high-efficiency fire extinguishing facility for ultra-high voltage transformers according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the fan assembly according to an embodiment of the present invention;

[0028] Figure 3 This is a partially enlarged cross-sectional view of the fan assembly according to an embodiment of the present invention;

[0029] Figure 4 This is a structural schematic diagram of the fire extinguishing test model of the high-efficiency fire extinguishing facility for ultra-high voltage transformers according to an embodiment of the present invention (with the fan assembly hidden);

[0030] Figure 5 yes Figure 4 Enlarged view at point B in the middle;

[0031] Figure 6 yes Figure 4 Enlarged view at point C;

[0032] Numbering on the map:

[0033] 1. Transformer model; 11. Through-hole; 12. Cooling fan; 13. Guide rail;

[0034] 2, fan assembly; 21, fan bracket; 22, connecting piece; 23, clamping mechanism; 231, connecting barrel; 232, insertion shaft; 233, limiting ring; 234, elastic member; 24, fan body;

[0035] 3, opening adjusting mechanism; 31, sliding plate; 32, screw rod; 33, motor;

[0036] 4, fire-fighting assembly; 41, fire wall; 42, fire-fighting pipeline; 43, fire-fighting nozzle; 44, supply pipe; 45, fire-fighting gun;

[0037] 5, oil infiltration belt; 6, oil collecting disc. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] Embodiment one:

[0040] As shown in Figure 1 , Figure 4 , the high-efficiency fire extinguishing facility for extra-high voltage transformer includes a transformer model 1, a fan assembly 2 capable of changing wind direction and wind volume, an opening adjusting mechanism 3, and a fire-fighting assembly 4. The transformer model 1 is placed on the ground A, the fire-fighting assembly 4 is located at the periphery of the transformer model 1, the fan assembly 2 is located at one side of the transformer model 1, the transformer model 1 is provided with a through hole 11, and the opening adjusting mechanism 3 is connected to the transformer model 1 and can adjust the shielding of the through hole 11. The opening adjusting mechanism 3 is provided as two groups to simulate the size of the opening after the explosion of the transformer. With the intensification of the combustion, the opening of the explosion becomes larger and larger, and the shape gradually shrinks. The through hole 11 penetrates into the inside of the transformer model 1.

[0041] Specifically, as shown in Figure 2As shown, the fan assembly 2 comprises a fan bracket 21, a connecting piece 22, a clamping mechanism 23, and a fan body 24. The fan bracket 21 is a U-shaped bracket, and the two top ends of the fan bracket 21 are connected to the connecting piece 22. The connecting piece 22 is in a cylindrical structure. The two ends of the fan body 24 are rotatably connected to the connecting piece 22. The two ends of the fan bracket 21 can be connected to bearings installed in the connecting piece 22. One end of the clamping mechanism 23 is connected to the connecting piece 22, and the other end of the clamping mechanism 23 can be connected to or separated from the fan body 24 in different angle states.

[0042] As shown in the drawings, Figure 3 The clamping mechanism 23 comprises a connecting cylinder 231, a plug shaft 232, a limiting ring 233, and an elastic member 234. The fan body 24 is provided with a plurality of ring-shaped insertion holes 241. The connecting cylinder 231 is in a cylindrical structure and has an internal cavity. The bottom of the connecting cylinder 231 is connected to the connecting piece 22, and the axis of the connecting cylinder 231 is parallel to the axis of the connecting piece 22. The plug shaft 232 penetrates the connecting cylinder 231 from one end of the connecting cylinder 231 and can be inserted into the insertion hole 241 from the other end. The plug shaft 232 is a cylindrical rod. Holes are formed in the two ends of the connecting cylinder 231 for the plug shaft 232 to pass through. The end of the plug shaft 232 away from the insertion hole 241 has a larger diameter, which is used to keep the end of the plug shaft 232 always outside the connecting cylinder 231. The plug shaft 232 is coaxially arranged with the connecting cylinder 231. The limiting ring 233 is fixedly connected to the outside of the plug shaft 232 and located inside the connecting cylinder 231. The two ends of the elastic member 234 abut against the inner end face of the connecting cylinder 231 away from the insertion hole 241 and the end face of the limiting ring 233 away from the insertion hole 241, respectively. The limiting ring 233 is an annular plate and can be connected to the plug shaft 232 by welding.

[0043] In this embodiment, the insertion holes 241 are arranged along the circumference of the connecting piece 22. The elastic member 234 is a spring. The fan body 24 is a variable frequency fan.

[0044] As shown in the drawings, Figure 3 As shown in the drawings, if it is necessary to adjust the angle of the fan body 24, the plug shaft 232 is pulled out, the limiting ring 233 compresses the elastic member 234 and drives the plug shaft 232 to move, so that the plug shaft 232 is separated from the insertion hole 241. The fan body 24 is rotated, so that the next insertion hole 241 or the insertion hole 241 at a preset position is coaxially corresponding to the plug shaft 232. Then, the plug shaft 232 is released, and the plug shaft 232 is inserted into the preset insertion hole 241 under the action of the elastic member 234. The stability of the plug shaft 232 inserted into the insertion hole 241 is maintained by the elastic member 234 and the limiting ring 233, and the fixation of the fan body 24 is realized.

[0045] The embodiment is simple in structure and can adjust the rotating angle of the fan body 24, so as to adjust the wind direction, so that the fan body 24 blows in a direction inclined upward or downward, and the blowing position of the fan body 24 can be directly adjusted, that is, the fan body 24 is directly rotated to adjust the angle left and right, so that the blowing effect of different wind powers and different angles can be better simulated.

[0046] Embodiment two:

[0047] As shown in Figure 4 , Figure 5 , Figure 6 , on the basis of embodiment one, the top surface and the side surface of the transformer model 1 are provided with through holes 11, and the side surface of the transformer model 1 is connected with a plurality of cooling fans 12.

[0048] The opening adjusting mechanism 3 is slidably connected to the top surface and the side surface of the transformer model 1 and located outside the through holes 11.

[0049] Specifically, as shown in Figure 5 , Figure 6 , the opening adjusting mechanisms 3 at positions B and C in Figure 4 are respectively, the components of the two opening adjusting mechanisms 3 are the same, and the sizes can be appropriately changed according to the size and structure of the transformer model 1.

[0050] As shown in Figure 5 , guide sliding rails 13 are arranged on the outer surface of the transformer model 1 and on both sides of the through holes 11, the opening adjusting mechanism 3 comprises a sliding plate 31, a lead screw 32 and a motor 33, the sliding plate 31 is slidably connected to the guide sliding rails 13 on both sides, the end of the sliding plate 31 is connected to the lead screw 32, and the lead screw 32 is connected to the motor 33.

[0051] The sliding plate 31 is driven by the motor 33 to slide on the guide sliding rails 13, and different parts of the through holes 11 are shielded by the sliding plate 31, so that different crack opening sizes are simulated on the upper end and one side of the transformer model 1, the situation that different cracks and openings are burned on the outer surface of the transformer model 1 when a fire occurs can be simulated, so that the real fire situation can be simulated more realistically through the model, and the structure is simple and reliable in adjustment.

[0052] Embodiment three:

[0053] As shown in Figure 4As shown, based on the above embodiment one or two, the fire-fighting component 4 includes a firewall 41, a fire-fighting pipeline 42, fire sprinklers 43, a supply pipe 44, and a fire monitor 45. The firewall 41 is located on both sides of the transformer model 1. The fire-fighting pipeline 42 is arranged along the firewall 41 and is connected to the fire sprinklers 43. There are multiple fire sprinklers 43, which are evenly arranged along the length of the firewall 41. The supply pipe 44 is arranged along the firewall 41, and the fire monitor 45 is installed on the top of the firewall 41 and connected to the supply pipe 44.

[0054] Fire sprinkler 43 is an electrically operated sprinkler that can be electrically activated in the event of a fire. The fire extinguishing pipe 42 contains foam extinguishing agent. Fire monitor 45 is a fine water mist turbine cannon. The effective range of fire sprinkler 43 and fire monitor 45 is the side of firewall 41 except for the side furthest from transformer model 1. The fire sprinkler 43 and fire monitor 45 on both sides can cover the exterior of transformer model 1.

[0055] like Figure 4 As shown, an oil seepage zone 5 is provided around the transformer model 1. The oil seepage zone 5 is a strip structure composed of pebbles. An oil collection plate 6 is provided on one side of the transformer model 1 to collect the oil that seeps out of the transformer model 1 in the event of a fire, so as to avoid the transformer oil from polluting the environment.

[0056] The method for testing and evaluating the fire extinguishing system of a high-efficiency fire extinguishing facility for an ultra-high voltage transformer in this embodiment includes the following specific steps:

[0057] S01: Place a group of flammable materials around the outer surface of transformer model 1 and ignite them to simulate a fire; the flammable materials are placed between transformer model 1 and the oil seepage zone 5, close to transformer model 1.

[0058] Flammable materials can be placed at different locations in transformer model 1, and the amount of flammable materials can be adjusted to simulate fire scenarios with different amounts and locations.

[0059] S02: When a fire is detected in the area of ​​transformer model 1, the fire sprinkler head 43 and fire monitor 45 will immediately start to automatically carry out fire extinguishing measures. At this time, the fire monitor 45 will immediately spray water mist to extinguish the fire around transformer model 1. At the same time, the fire pipeline 42 will supply foam extinguishing agent into the fire sprinkler head 43, and the fire sprinkler head 43 will automatically extinguish the fire around transformer model 1.

[0060] S03: By driving the motor 33 to rotate clockwise and counterclockwise, the slide plate 31 moves along the length of the lead screw 32, so that the opening of the through hole 11 forms openings of different sizes, thereby simulating the scene where cracks or openings are burned on the outer surface of the transformer model 1.

[0061] S04: By starting the fan body 24, the fan body 24 blows the range of the transformer model 1, thereby simulating the scenario of the fire on the transformer model 1 in the case of wind;

[0062] S05: The fire extinguishing nozzle 43 and the fire monitor 45 complete the fire extinguishing of the transformer model 1 region, that is, a single simulation is completed, and the fire extinguishing time, the wind direction and the wind size, the response speed, the fire extinguishing time, the cooling time and the anti-burst ability are recorded, thereby obtaining the evaluation result.

[0063] It should be noted that the response speed refers to the response time of the fire extinguishing after the fire, such as starting to respond to extinguish the fire 3 minutes after the fire;

[0064] The anti-burst ability refers to the ability of the entire device to resist burst, and the influence of the fire extinguishing process on the burst. The larger the fire is, the greater the probability of burst is. The fire extinguishing system reduces the fire, and the possibility of burst is smaller.

[0065] At the same time, the combustible material can be directly put into the inside of the transformer model 1 through the opening adjusting mechanism 3, and then the opening of the opening adjusting mechanism 3 is completely closed. Before closing, the combustible material is ignited, thereby simulating the self-ignition caused by internal short circuit, heavy overload and insulation damage of the transformer model 1.

[0066] The longer the fire extinguishing time is, the worse the fire extinguishing effect is. The actual fire extinguishing effect can be evaluated according to the time of finally completing the fire extinguishing.

[0067] The embodiment simulates the wind force and the size of the wind force blown by the fan assembly 2 to the transformer model 1 from different angles, thereby simulating the effect of the wind force blown in different wind force sizes and different angles through the model. The opening adjusting mechanism 3 simulates the case that different cracks and openings are burned on the outer surface of the transformer model 1 when the fire occurs, thereby more truly simulating the real fire situation through the model, thereby simulating the real fire situation, evaluating the actual fire extinguishing situation of the fire extinguishing assembly 4, and having important significance for simulating the fire extinguishing in the real situation. The occurrence of safety hazards can be reduced.

[0068] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for extinguishing fire test model using high efficient fire extinguishing facility of extra high voltage transformer, characterized in that, The fire extinguishing test model comprises a transformer model, a fan assembly capable of changing the wind direction and the wind volume, an opening adjusting mechanism, and a fire extinguishing assembly; the fire extinguishing assembly is located at the periphery of the transformer model, the fan assembly is located at one side of the transformer model, the transformer model is provided with a through hole, and the opening adjusting mechanism is connected to the transformer model and capable of adjusting the shielding of the through hole. The method comprises the following steps: placing flammable materials on the peripheral surface of the transformer model and igniting; the fire extinguishing assembly extinguishes the fire in the fire area; the opening adjusting mechanism shields the through hole to form openings of different sizes, thereby simulating the burning of cracks of different sizes on the outer surface of the transformer model; the fan assembly is changed to simulate the fire scene of the transformer model under different wind directions and wind volumes; and the fire extinguishing capacity is evaluated after recording various parameters.

2. The method of claim 1, wherein, The fan assembly comprises a fan bracket, a connecting piece, a clamping mechanism, and a fan body; the top end of the fan bracket is connected to the connecting piece; the two ends of the fan body are rotatably connected to the connecting piece; one end of the clamping mechanism is connected to the connecting piece; and the other end of the clamping mechanism is connectable to or separable from the fan body in different angular states.

3. The method of claim 2, wherein, The clamping mechanism comprises a connecting cylinder and a plug shaft; the fan body is provided with a plurality of ring-shaped plug holes; the connecting cylinder is connected to the connecting piece; and the plug shaft penetrates through the connecting cylinder from the outside of one end of the connecting cylinder and can be inserted into the plug hole after extending out from the other end.

4. The method of claim 3, wherein, The clamping mechanism further comprises a limiting ring and an elastic piece; the limiting ring is fixedly connected to the outside of the plug shaft and located in the inside of the connecting cylinder; and the two ends of the elastic piece abut against the inner end face of the connecting cylinder away from the plug hole and the end face of the limiting ring away from the plug hole, respectively.

5. The method of claim 3, wherein, The plug holes are arranged along the circumference of the connecting piece.

6. The method of claim 1, wherein, The top surface and the side surface of the transformer model are provided with through holes; and the opening adjusting mechanism is slidably connected to the top surface and the side surface of the transformer model and located outside the through holes.

7. The method of claim 6, wherein, The outer surface of the transformer model is provided with guide rails on both sides of the through holes; and the opening adjusting mechanism comprises a sliding plate, a lead screw, and a motor; the two sides of the sliding plate are slidably connected to the guide rails; the end of the sliding plate is connected to the lead screw; and the lead screw is connected to the motor.

8. The method of claim 1, wherein, The fire extinguishing assembly comprises a fireproof wall, a fire extinguishing pipeline, a fire extinguishing nozzle, a supply pipe, and a fire monitor; the fireproof wall is located outside the transformer model; the fire extinguishing pipeline and the supply pipe are connected to the fireproof wall; the fire extinguishing nozzle is connected to the fire extinguishing pipeline; and the fire monitor is connected to the supply pipe.

9. The method of claim 1, wherein, The transformer model is placed on the ground, and an oil seepage zone and an oil collection disc are further arranged on the ground around the outer side of the transformer model.

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