Large transformer fire high-temperature flue gas injection simulation experiment device

Abstract

The invention provides a large transformer fire high-temperature flue gas injection simulation experiment device which comprises a box body, an injection pipe is arranged on the box body, the injection pipe is communicated with an inner cavity of the box body, and the injection pipe is arranged in an on-off mode; the heating piece is arranged in the inner cavity of the box body, the heating piece is used for heating the oil liquid so that the oil liquid can be gasified to form oil gas, and the oil gas and the oil liquid are mixed to form smoke; wherein the heating temperature of the heating element is adjustably set; and the detection part is used for detecting real-time parameters of the smoke in the inner cavity of the box body, so that when the real-time parameters of the smoke in the inner cavity of the box body are equal to set parameters, the spraying pipe is controlled to be communicated, and the smoke in the inner cavity of the box body is sprayed out of the spraying pipe. According to the invention, the problem of poor result accuracy of a large transformer fire simulation experiment in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer fire simulation devices, in particular to a large transformer fire high-temperature smoke jet simulation experimental device. Background Art

[0002] Temperature sensors, smoke sensors, infrared thermal imagers and other composite fire detectors are commonly used to identify various smoke particles, high temperature of fire and other early features to achieve early fire detection of large transformers, and incorporate the detection signals into the automatic fire alarm and linkage system. It can be seen that the performance of fire detectors determines the efficiency and accuracy of large transformer fire alarms. Therefore, it is necessary to test the performance of fire detectors through large transformer fire simulation experiments.

[0003] However, due to the complex composition of large transformer oil, the generation and injection of high-temperature oil vapor and smoke at the initial stage of a fire are difficult to reproduce using general experimental equipment, resulting in poor accuracy in the results of large transformer fire simulation experiments. Summary of the invention

[0004] The main purpose of the present invention is to provide a large transformer fire high temperature smoke injection simulation experiment device to solve the problem of poor accuracy of the results of large transformer fire simulation experiments in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a large transformer fire high-temperature smoke injection simulation experimental device, comprising: a box body, a spray pipe is arranged on the box body, the spray pipe is connected to the inner cavity of the box body, and the spray pipe can be turned on and off; a heating element, the heating element is arranged in the inner cavity of the box body, the heating element is used to heat the oil to gasify the oil to form oil gas, and the oil gas and the oil are mixed to form smoke; wherein the heating temperature of the heating element can be adjusted; a detection component, the detection component is used to detect the real-time parameters of the smoke in the inner cavity of the box body, so that when the real-time parameters of the smoke in the inner cavity of the box body are equal to the set parameters, the spray pipe is controlled to be connected, so that the smoke in the inner cavity of the box body is ejected from the spray pipe.

[0006] Furthermore, the detection component includes a first detection component, a second detection component and a third detection component, which are respectively used to detect the real-time temperature, real-time optical density and real-time pressure of the smoke in the inner cavity of the box, so as to control the connection of the injection pipe when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure.

[0007] Furthermore, the large transformer fire high-temperature smoke injection simulation experimental device also includes a gas supply part, which is used to accommodate high-pressure gas. The gas supply part is connected to the inner cavity of the box body through a gas pipeline in a switchable manner, so that when the real-time temperature is equal to the set temperature and the real-time optical density is equal to the set optical density, the gas pipeline is controlled to be connected so that the high-pressure gas enters the inner cavity of the box body at the set pressure.

[0008] Furthermore, the heating element is an electric heating furnace, and the heating power of the electric heating furnace can be adjusted to adjust the heating temperature of the heating element; the heating element is communicatively connected to the controller so that the controller controls the opening and closing of the heating element according to the detection result of the first detection element.

[0009] Furthermore, a first solenoid valve is provided on the gas pipeline, and a second solenoid valve is provided on the injection pipe. The first solenoid valve, the second solenoid valve and the detection component are all communicatively connected with the controller, so that when the real-time temperature is equal to the set temperature, the real-time pressure is less than the set pressure, and the real-time optical density is equal to the set optical density, the controller controls the first solenoid valve to open and the second solenoid valve to close; so that when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure, the controller controls the first solenoid valve to close and the second solenoid valve to open.

[0010] Furthermore, the box body includes a top wall, a bottom wall, a first circumferential side wall, a second circumferential side wall, a third circumferential side wall and a fourth circumferential side wall which are connected to each other, the second detection member is arranged on the second circumferential side wall, and the first detection member and the third detection member are arranged on the top wall at intervals.

[0011] Furthermore, a pressure relief pipeline is also arranged on the fourth circumferential side wall, and the pressure relief pipeline and the inner cavity of the box body can be opened and closed, so that when the real-time pressure is equal to the maximum preset pressure, the pressure relief pipeline is controlled to be connected with the inner cavity of the box body.

[0012] Furthermore, a first communication port is provided on the second circumferential side wall of the box body, one end of the first communication port is communicated with the gas pipeline, and the other end of the first communication port is communicated with the inner cavity of the box body.

[0013] Furthermore, a second communication port is provided on the fourth circumferential side wall of the box body, one end of the second communication port is communicated with the injection pipe, and the other end of the second communication port is communicated with the inner cavity of the box body.

[0014] Furthermore, a mounting groove is provided on the first circumferential side wall of the box body, and the mounting groove is used to install the door body. The door body is openably and closably arranged relative to the first circumferential side wall, and a sealing member is provided on the groove wall of the mounting groove to seal the door body.

[0015] By applying the technical scheme of the present invention, a large transformer fire high-temperature smoke jet simulation experimental device comprises a box, a heating element and a detection component, a jet pipe is arranged on the box, the oil is heated by the heating element to gasify the oil to form oil gas, the oil gas and the oil are mixed to form smoke, the detection component detects the real-time parameters of the smoke in the box inner cavity, and when the real-time parameters of the smoke in the box inner cavity are equal to the set parameters, the jet pipe is controlled to be connected, so that the smoke in the box inner cavity is ejected from the jet pipe, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present invention can accurately control and simulate the high-temperature smoke environment during the transformer fire, and ensure that the smoke ejected from the jet pipe can accurately simulate the smoke generated in the early stage of the transformer fire, and then the smoke ejected from the jet pipe can reliably detect the performance of the fire detector, thereby solving the problem of poor accuracy of the results of the large transformer fire simulation experiment in the prior art; at the same time, only oil needs to be added to the heating element, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present application can be repeatedly used, thereby reducing the experimental cost of the large transformer fire high-temperature smoke jet simulation experiment; at the same time, the large transformer fire high-temperature smoke jet simulation experimental device of the present application has the advantages of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A structural schematic diagram of an embodiment of a large transformer fire high-temperature smoke injection simulation experimental device according to the present invention is shown.

[0018] The above drawings include the following reference numerals:

[0019] 1. Box body; 2. Injection pipe; 3. Heating element; 4. First detection element; 5. Second detection element; 6. Third detection element; 7. Air supply element; 8. Gas pipeline; 10. First solenoid valve; 11. Second solenoid valve; 12. First circumferential side wall; 15. Fourth circumferential side wall; 16. Pressure relief pipeline; 101. Door body. DETAILED DESCRIPTION

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] Please refer to Figure 1 The present invention provides a large transformer fire high-temperature smoke injection simulation experimental device, comprising: a box body 1, a spray pipe 2 is arranged on the box body 1, the spray pipe 2 is arranged to be connected to the inner cavity of the box body 1, and the spray pipe 2 can be turned on and off; a heating element 3, the heating element 3 is arranged in the inner cavity of the box body 1, the heating element 3 is used to heat the oil to gasify the oil to form oil gas, and the oil gas and the oil are mixed to form smoke; wherein the heating temperature of the heating element 3 can be adjusted; a detection component, the detection component is used to detect the real-time parameters of the smoke in the inner cavity of the box body 1, so that when the real-time parameters of the smoke in the inner cavity of the box body 1 are equal to the set parameters, the spray pipe 2 is controlled to be connected, so that the smoke in the inner cavity of the box body 1 is ejected from the spray pipe 2.

[0024] The large transformer fire high-temperature smoke jet simulation experimental device of the present invention comprises a box body, a heating element and a detection component. The box body is provided with a jet pipe. The oil is heated by the heating element to gasify the oil to form oil gas. The oil gas and the oil are mixed to form smoke. The detection component detects the real-time parameters of the smoke in the inner cavity of the box body. When the real-time parameters of the smoke in the inner cavity of the box body are equal to the set parameters, the jet pipe is controlled to be connected so that the smoke in the inner cavity of the box body is ejected from the jet pipe, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present invention can accurately control and simulate the high-temperature smoke environment during the transformer fire, and ensure that the smoke ejected from the jet pipe 2 can accurately simulate the smoke generated in the early stage of the transformer fire, and then the smoke ejected from the jet pipe 2 can reliably detect the performance of the fire detector, thereby solving the problem of poor accuracy of the results of the large transformer fire simulation experiment in the prior art; at the same time, only oil needs to be added to the heating element 3, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present application can be repeatedly used, thereby reducing the experimental cost of the large transformer fire high-temperature smoke jet simulation experiment; at the same time, the large transformer fire high-temperature smoke jet simulation experimental device of the present application has the advantages of simple structure and easy use.

[0025] In this embodiment, the detection component includes a first detection component 4, a second detection component 5 and a third detection component 6, which are respectively used to detect the real-time temperature, real-time optical density and real-time pressure of the smoke in the inner cavity of the box body 1, so as to control the connection of the injection pipe 2 when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure.

[0026] Specifically, by setting the real-time temperature equal to the set temperature, the real-time optical density equal to the set optical density, and the real-time pressure equal to the set pressure, the injection pipe 2 is controlled to be connected, so as to ensure that the temperature, optical density and pressure of the smoke ejected from the injection pipe 2 are the same as the various parameters of the smoke generated in the early stage of the transformer fire, thereby ensuring that the smoke ejected from the injection pipe 2 can accurately simulate the smoke generated in the early stage of the transformer fire.

[0027] Specifically, the first detection component 4 is a temperature sensor, the third detection component 6 is a pressure sensor, and the second detection component 5 is a smoke optical densitometer.

[0028] In this embodiment, the large transformer fire high-temperature smoke injection simulation experimental device also includes an air supply component 7, which is used to accommodate high-pressure gas. The air supply component 7 is connected to the inner cavity of the box body 1 through a gas pipeline 8 in an on-off manner, so that when the real-time temperature is equal to the set temperature and the real-time optical density is equal to the set optical density, the gas pipeline 8 is controlled to be connected so that the high-pressure gas enters the inner cavity of the box body 1 at the set pressure.

[0029] Specifically, by setting the real-time temperature equal to the set temperature and the real-time optical density equal to the set optical density, the gas pipeline 8 is controlled to be connected, so that the high-pressure gas enters the inner cavity of the box body 1 at the set pressure, so that the real-time pressure of the smoke in the inner cavity of the box body 1 increases, until the third detection component 6 detects that the real-time pressure of the smoke in the inner cavity of the box body 1 is equal to the set pressure, thereby simulating the smoke injection phenomenon caused by explosion or pressure fluctuation in transformer fire, ensuring that the injection pipe 2 can reach the connection condition, and the smoke in the inner cavity of the box body 1 can be smoothly ejected from the injection pipe 2.

[0030] In this embodiment, the heating element 3 is an electric heating furnace, and the heating power of the electric heating furnace can be adjusted to adjust the heating temperature of the heating element 3; the heating element 3 is communicatively connected to the controller so that the controller controls the opening and closing of the heating element 3 according to the detection result of the first detection element 4.

[0031] Specifically, such a setting enables the heating element 3 to automatically and accurately adjust the heating temperature according to the experimental requirements, ensuring that the real-time temperature of the smoke in the inner cavity of the box body 1 can be heated to be equal to the set temperature, ensuring that the injection pipe 2 can reach the connection condition, and the smoke in the inner cavity of the box body 1 can be smoothly ejected from the injection pipe 2; at the same time, the heating temperature of the heating element 3 is adjustable, so that the heating element 3 is suitable for transformer fire simulation experiments of different scales and types.

[0032] In this embodiment, a first solenoid valve 10 is provided on the gas pipeline 8, and a second solenoid valve 11 is provided on the injection pipe 2. The first solenoid valve 10, the second solenoid valve 11 and the detection component are all communicatively connected with the controller, so that when the real-time temperature is equal to the set temperature, the real-time pressure is less than the set pressure, and the real-time optical density is equal to the set optical density, the controller controls the first solenoid valve 10 to open and the second solenoid valve 11 to close; so that when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure, the controller controls the first solenoid valve 10 to close and the second solenoid valve 11 to open.

[0033] Specifically, by setting the first solenoid valve 10 and the second solenoid valve 11, the controllability of the generation and injection process of the smoke during the simulation experiment is ensured, and it is ensured that when the real-time temperature is equal to the set temperature, the real-time pressure is less than the set pressure, and the real-time optical density is equal to the set optical density, the gas pipeline 8 is connected, the injection pipe 2 is disconnected, and the high-pressure gas is introduced into the inner cavity of the box 1, so as to ensure that the real-time pressure of the smoke in the inner cavity of the box 1 increases, and the low-pressure smoke is prevented from being ejected from the injection pipe 2; when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure, the gas pipeline 8 is disconnected, and the injection pipe 2 is connected, so as to prevent the high-pressure gas from continuing to be introduced into the inner cavity of the box 1, and the smoke in the inner cavity of the box 1 can be smoothly ejected from the injection pipe 2.

[0034] In this embodiment, the box body 1 includes a top wall, a bottom wall, a first circumferential side wall 12, a second circumferential side wall, a third circumferential side wall and a fourth circumferential side wall 15 which are connected to each other, the second detection member 5 is arranged on the second circumferential side wall, and the first detection member 4 and the third detection member 6 are arranged at intervals on the top wall.

[0035] Specifically, this structural layout enables the detection component to monitor the environmental parameters of the inner cavity of the box body 1 in all directions, ensuring the comprehensiveness and accuracy of the simulation experiment data, and is suitable for multi-angle and multi-directional research on transformer fire smoke characteristics.

[0036] In this embodiment, a pressure relief pipe 16 is further provided on the fourth circumferential side wall 15, and the pressure relief pipe 16 and the inner cavity of the box body 1 can be opened and closed so that when the real-time pressure is equal to the maximum preset pressure, the pressure relief pipe 16 is controlled to be connected with the inner cavity of the box body 1.

[0037] Specifically, this safety pressure relief design effectively prevents explosions that may be caused by excessive real-time pressure of smoke in the inner cavity of the box 1 during the experiment, ensures the safety of experimenters and equipment, and makes the large transformer fire high-temperature smoke injection simulation experiment device of the present invention suitable for fire simulation experiments under high-pressure environments.

[0038] Specifically, the maximum preset pressure refers to the maximum pressure that the box body 1 can withstand.

[0039] In this embodiment, a first communication port is provided on the second circumferential side wall of the box body 1 , one end of the first communication port is communicated with the gas pipeline 8 , and the other end of the first communication port is communicated with the inner cavity of the box body 1 .

[0040] Specifically, such a configuration ensures that the high-pressure gas in the gas pipeline 8 can flow into the inner cavity of the box body 1 through the first connecting port, thereby ensuring that the real-time pressure of the smoke in the inner cavity of the box body 1 increases smoothly.

[0041] In this embodiment, a second communication port is provided on the peripheral side wall 15 of the box body 1 , one end of the second communication port is communicated with the injection pipe 2 , and the other end of the second communication port is communicated with the inner cavity of the box body 1 .

[0042] Specifically, such a configuration ensures that smoke in the inner cavity of the box body 1 can enter the injection pipe 2 through the second connecting port and be smoothly ejected from the injection pipe 2 .

[0043] In this embodiment, an installation groove is opened on the first circumferential side wall 12 of the box body 1, and the installation groove is used to install the door body 101. The door body 101 can be opened and closed relative to the first circumferential side wall 12. A sealing member is arranged on the groove wall of the installation groove to seal the door body 101.

[0044] Specifically, such a setting not only facilitates the operation and observation of the experimenters, but also effectively prevents smoke leakage, ensures the cleanliness and safety of the experimental environment, and makes the large transformer fire high-temperature smoke injection simulation experimental device of the present invention suitable for fire research and equipment testing scenarios that require frequent entry and exit of the box 1.

[0045] Specifically, the box body 1 is made of high-pressure resistant heat-insulating material, and the size of the box body 1 is 50cm*50cm*50cm.

[0046] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0047] The large transformer fire high-temperature smoke jet simulation experimental device of the present invention comprises a box body, a heating element and a detection component. The box body is provided with a jet pipe. The oil is heated by the heating element to gasify the oil to form oil gas. The oil gas and the oil are mixed to form smoke. The detection component detects the real-time parameters of the smoke in the inner cavity of the box body. When the real-time parameters of the smoke in the inner cavity of the box body are equal to the set parameters, the jet pipe is controlled to be connected so that the smoke in the inner cavity of the box body is ejected from the jet pipe, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present invention can accurately control and simulate the high-temperature smoke environment during the transformer fire, and ensure that the smoke ejected from the jet pipe 2 can accurately simulate the smoke generated in the early stage of the transformer fire, and then the smoke ejected from the jet pipe 2 can reliably detect the performance of the fire detector, thereby solving the problem of poor accuracy of the results of the large transformer fire simulation experiment in the prior art; at the same time, only oil needs to be added to the heating element 3, so that the large transformer fire high-temperature smoke jet simulation experimental device of the present application can be repeatedly used, thereby reducing the experimental cost of the large transformer fire high-temperature smoke jet simulation experiment; at the same time, the large transformer fire high-temperature smoke jet simulation experimental device of the present application has the advantages of simple structure and easy use.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large transformer fire high temperature smoke injection simulation experimental device, characterized in that: include: A box body (1), wherein a spray pipe (2) is arranged on the box body (1), the spray pipe (2) is arranged to be connected to the inner cavity of the box body (1), and the spray pipe (2) can be turned on and off; A heating element (3), the heating element (3) being arranged in the inner cavity of the box body (1), the heating element (3) being used to heat the oil liquid so as to gasify the oil liquid to form oil gas, the oil gas and the oil liquid being mixed to form smoke; wherein the heating temperature of the heating element (3) can be adjusted; A detection component is used to detect the real-time parameters of the smoke in the inner cavity of the box (1), so that when the real-time parameters of the smoke in the inner cavity of the box (1) are equal to the set parameters, the injection pipe (2) is controlled to be connected so that the smoke in the inner cavity of the box (1) is ejected from the injection pipe (2).

2. The large transformer fire high temperature smoke injection simulation experimental device according to claim 1 is characterized in that: The detection component comprises a first detection member (4), a second detection member (5) and a third detection member (6), wherein the first detection member (4), the second detection member (5) and the third detection member (6) are respectively used to detect the real-time temperature, the real-time optical density and the real-time pressure of the smoke in the inner cavity of the box body (1), so as to control the connection of the injection pipe (2) when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure.

3. The large transformer fire high temperature smoke injection simulation experimental device according to claim 2 is characterized in that: The large transformer fire high-temperature smoke jet simulation experimental device also includes an air supply component (7), the air supply component (7) is used to contain high-pressure gas, the air supply component (7) is connected to the inner cavity of the box (1) through a gas pipeline (8) in an on-off manner, so that when the real-time temperature is equal to the set temperature and the real-time optical density is equal to the set optical density, the gas pipeline (8) is controlled to be connected, so that the high-pressure gas enters the inner cavity of the box (1) at the set pressure.

4. The large transformer fire high temperature smoke injection simulation experimental device according to claim 2 is characterized in that: The heating element (3) is an electric heating furnace, and the heating power of the electric heating furnace can be adjusted to adjust the heating temperature of the heating element (3); the heating element (3) is communicatively connected to a controller so that the controller controls the opening and closing of the heating element (3) according to the detection result of the first detection element (4).

5. The large transformer fire high temperature smoke injection simulation experimental device according to claim 3 is characterized in that: The gas pipeline (8) is provided with a first solenoid valve (10), and the injection pipe (2) is provided with a second solenoid valve (11). The first solenoid valve (10), the second solenoid valve (11) and the detection component are all connected to a controller for communication, so that when the real-time temperature is equal to the set temperature, the real-time pressure is less than the set pressure, and the real-time optical density is equal to the set optical density, the controller controls the first solenoid valve (10) to open and the second solenoid valve (11) to close; and when the real-time temperature is equal to the set temperature, the real-time optical density is equal to the set optical density, and the real-time pressure is equal to the set pressure, the controller controls the first solenoid valve (10) to close and the second solenoid valve (11) to open.

6. The large transformer fire high temperature smoke injection simulation experimental device according to claim 2 is characterized in that: The box body (1) comprises a top wall, a bottom wall, a first circumferential side wall (12), a second circumferential side wall, a third circumferential side wall and a fourth circumferential side wall (15) which are connected to each other, the second detection member (5) is arranged on the second circumferential side wall, and the first detection member (4) and the third detection member (6) are arranged on the top wall at intervals.

7. The large transformer fire high temperature smoke injection simulation experimental device according to claim 6 is characterized in that: The fourth circumferential side wall (15) is also provided with a pressure relief pipeline (16), and the pressure relief pipeline (16) and the inner cavity of the box body (1) can be connected and disconnected, so that when the real-time pressure is equal to the maximum preset pressure, the pressure relief pipeline (16) is controlled to be connected with the inner cavity of the box body (1).

8. The large transformer fire high temperature smoke injection simulation experimental device according to claim 1 is characterized in that: A first communication port is provided on the second circumferential side wall of the box body (1), one end of the first communication port is connected to the gas pipeline (8), and the other end of the first communication port is connected to the inner cavity of the box body (1).

9. The large transformer fire high temperature smoke injection simulation experimental device according to claim 1 is characterized in that: A second communication port is provided on the peripheral side wall (15) of the box body (1), one end of the second communication port is connected to the injection pipe (2), and the other end of the second communication port is connected to the inner cavity of the box body (1).

10. The large transformer fire high temperature smoke injection simulation experimental device according to claim 1 is characterized in that: A mounting groove is provided on the first circumferential side wall (12) of the box body (1), and the mounting groove is used to install the door body (101). The door body (101) is openably and closably arranged relative to the first circumferential side wall (12), and a sealing member is provided on the groove wall of the mounting groove to seal the door body (101).

Images