A multi-functional ventilation facility and method for ship scene real fire training

Abstract

The application discloses a kind of ship scene real fire training multifunctional ventilation facilities and method, including air supplementing and temperature discharging unit, gas cleaning unit, personnel passage smoke exhaust unit and ventilation safety monitoring unit, air supplementing and temperature discharging unit includes air supplementing and temperature discharging fan, suction temperature discharge pipeline and temperature discharge grid, for high-temperature flue gas extraction and discharge;Gas cleaning unit includes gas cleaning fan, gas cleaning pipeline and cleaning grid, for discharging gas overflowed by combustion;Personnel passage smoke exhaust unit includes passage smoke exhaust fan, passage smoke exhaust pipeline and smoke exhaust grid, for extracting and discharging passage thick smoke;Ventilation safety monitoring unit includes monitoring assembly and control assembly, realizes parameter real-time monitoring and the linkage control of each ventilation unit.Collaborative linkage is realized through air supplementing and temperature discharging, gas cleaning, passage smoke exhaust and ventilation safety monitoring unit, realizes "monitoring-early warning-disposal-tail" whole-process management and control, realizes the ventilation of real fire scene of ship closed space, toxic gas control and training safety protection.

Description

Technical Field

[0001] This invention belongs to the field of ship safety engineering and fire training technology, and more specifically, relates to a multifunctional ventilation facility and method for live fire training in ship scenarios. Background Technology

[0002] Damage control (DDC) is a systematic engineering approach for rapid emergency response to sudden disasters (such as fires and flooding) in confined spaces like ships. Its core value lies in curbing the spread of disasters and maximizing the safety of personnel and critical equipment through systematic intervention. Specialized DDC training, by simulating real disaster scenarios, transforms emergency plans into muscle memory for personnel, ensuring that they can still execute standardized procedures under high-pressure environments. Among these, fire-fighting training, a key means of addressing high-frequency disasters within the DDC system, focuses on honing personnel's tactical skills and teamwork capabilities under conditions of high temperature and low visibility.

[0003] As the core support for live-fire damage control training, the ventilation system plays a crucial role in regulating fire behavior and directly ensuring the safety and sustainability of such training. With the development of the shipping industry and the continuous expansion of marine engineering, the requirements for the specialization, systematization, and functional completeness of ventilation facilities in live-fire damage control training on ships are increasingly demanding. Currently, domestic and international live-fire damage control training primarily focuses on open or large open spaces such as chemical plants and civil buildings. Dedicated ventilation facilities for the confined, small spaces of ships are scarce, and their feasibility, safety, and training efficiency are insufficient to meet the actual needs of live-fire damage control training on ships. Therefore, it is necessary to develop a multi-functional ventilation system that is adaptable to ship scenarios and meets the needs of the entire live-fire damage control training process. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a multifunctional ventilation facility and method for live-fire training in naval scenarios. Through the coordinated operation of a supplementary air and exhaust unit, a gas removal unit, a passageway smoke extraction unit, and a ventilation safety monitoring unit, a complete closed-loop ventilation safety assurance system is formed. The ventilation safety monitoring unit collects real-time data on cabin temperature, gas concentration, and the operation of each unit, accurately identifies anomalies, and issues control commands. The supplementary air and exhaust unit adjusts its operating status promptly to achieve coordinated air supply and exhaust. The gas removal unit quickly removes overflowing gas, eliminating safety hazards. The passageway smoke extraction unit efficiently cleans up dense smoke after training. The four components work collaboratively to achieve full-process control from monitoring to early warning to handling to completion, improving the accuracy and efficiency of system operation, adapting to complex training conditions, reducing operational intensity, minimizing equipment wear and energy consumption, and ensuring the safe, orderly, and efficient progress of live-fire training throughout the entire process.

[0005] To achieve the above objectives, according to one aspect of the present invention, a multifunctional ventilation system for live-fire training in naval scenarios is provided, comprising an air supply and exhaust unit, a gas scavenging unit, a channel smoke exhaust unit, and a ventilation safety monitoring unit; wherein... The make-up air and exhaust unit includes a make-up air and exhaust fan and an intake and exhaust pipe. The make-up air and exhaust fan is installed outside the fire simulation chamber, and the intake and exhaust pipe is installed in the space above the fire point. Its outer end is connected to the inlet of the make-up air and exhaust fan, which is used to draw out the high-temperature smoke generated during the fire simulation and exhaust it into the atmosphere. The gas purging unit includes a gas purging fan and a gas purging pipeline. The gas purging fan is installed outside the fire simulation chamber, and the gas purging pipeline is installed inside the fire simulation chamber at the chamber wall position. Its outer end is connected to the inlet of the gas purging fan to draw the gas overflowing from the fire simulation combustion into the atmospheric environment. The personnel passage smoke exhaust unit includes a passage smoke exhaust fan, a passage smoke exhaust pipe, and a passage smoke exhaust grille. The passage smoke exhaust fan is installed at one end of the personnel passage, and the passage smoke exhaust pipe is installed at the top of the personnel passage, with one end connected to the inlet of the passage smoke exhaust fan. The outlet of the passage smoke exhaust fan is connected to the outside of the personnel passage. Multiple air vents are spaced apart on the passage smoke exhaust pipe, and a passage smoke exhaust grille is fixedly installed at each air vent to draw out the large amount of dense smoke generated in the personnel passage and discharge it into the external atmosphere. The ventilation safety monitoring unit includes a monitoring component and a control component. The monitoring component includes a temperature sensor and a concentration sensor for real-time monitoring of temperature parameters and various gas concentration parameters inside the fire simulation chamber. The control component includes a ventilation safety monitoring box and a ventilation local control box. The ventilation safety monitoring box is electrically connected to the monitoring component and the ventilation local control box. The ventilation local control box is electrically connected to the make-up air and exhaust temperature unit, the gas purging unit, and the personnel passage smoke exhaust unit.

[0006] Furthermore, the air supply and exhaust unit also includes an exhaust pipe, one end of which is sealed to the outlet of the air supply and exhaust fan, and the other end of which is connected to the exhaust trap.

[0007] Furthermore, the air supply and exhaust unit also includes multiple natural air supply grilles and an active air supply fan. The multiple natural air supply grilles are fixedly installed at intervals on the wall of the fire simulation chamber near the external environment. The active air supply fan is fixedly installed on the wall of the fire simulation chamber near the external environment. The inlet of the active air supply fan is connected to the atmospheric environment, and the outlet is connected to the interior of the fire simulation chamber.

[0008] Furthermore, the intake and exhaust piping includes a main intake and exhaust pipe and multiple intake and exhaust branch pipes. The main intake and exhaust pipe and the multiple intake and exhaust branch pipes are respectively arranged in the space above the fire point. One end of the main intake and exhaust pipe is sealed to the inlet of the make-up air exhaust fan. One end of each of the multiple intake and exhaust branch pipes is connected to the other end of the main intake and exhaust pipe. Multiple air outlets are spaced apart on the main intake and exhaust pipe and the multiple intake and exhaust branch pipes. Each air outlet is fixedly equipped with an exhaust grille.

[0009] Furthermore, the gas purging pipeline includes a main gas purging pipeline and multiple gas purging branch pipelines. The multiple gas purging branch pipelines are respectively arranged in the fire simulation chamber at positions on the chamber wall other than those equipped with natural air supply grilles. One end of each of the multiple gas purging branch pipelines is connected to one end of the main gas purging pipeline. The other end of the main gas purging pipeline passes through the chamber wall of the fire simulation chamber and is connected to the inlet of the gas purging fan. Multiple air outlets are spaced apart on the main gas purging pipeline and the multiple gas purging branch pipelines. Each air outlet is fixedly equipped with a purging grille, and the purging grille is oriented towards the interior of the fire simulation chamber.

[0010] Furthermore, the installation height of the gas purging branch pipe needs to be adapted according to the density characteristics of the gas component to be captured. When the gas component is gas with a density greater than air, the gas purging branch pipe is installed close to the wall of the fire simulation chamber and near the ground; when the gas component is gas with a density less than air, the gas purging branch pipe is installed close to the wall of the fire simulation chamber and near the top of the chamber.

[0011] Furthermore, multiple temperature sensors are provided, and these multiple temperature sensors are evenly distributed along the internal height direction of the fire simulation chamber, with one of the temperature sensors located at a height of 1500mm inside the chamber.

[0012] Furthermore, the concentration sensor group includes a gas concentration sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, and a carbon dioxide concentration sensor. The gas concentration sensor needs to be adaptively deployed according to the density characteristics of the gas components to be monitored, and is used to monitor the gas concentration in the fire simulation chamber in real time. The carbon monoxide concentration sensor and the oxygen concentration sensor are both located in the middle of the fire simulation chamber and are used to monitor the carbon monoxide concentration and oxygen concentration in the fire simulation chamber in real time, respectively. The carbon dioxide concentration sensor is installed at the top of the fire simulation chamber to monitor the carbon dioxide concentration in the chamber in real time.

[0013] Furthermore, the air supply and exhaust fan must pass the high temperature resistance and explosion-proof performance test, the intake and exhaust pipes are made of stainless steel, and the exhaust grille is made of brass. The gas scavenging fan must meet explosion-proof performance requirements, the gas scavenging pipeline is made of stainless steel, and the scavenging grille is made of brass.

[0014] According to a second aspect of the present invention, a multi-functional ventilation method for live-fire training in a shipboard scenario is provided, which is implemented using the aforementioned multi-functional ventilation facility for live-fire training in a shipboard scenario, and includes the following steps: S100: After the fire simulation fire training is started, the air supply and exhaust unit is started and operated. The air supply and exhaust unit is initially put into operation in a low-speed operation mode to achieve the initial extraction and discharge of high-temperature smoke in the early stage of the fire simulation. S200: The ventilation safety monitoring unit starts synchronously, and collects temperature parameters and various gas concentration parameters in the fire simulation chamber in real time through the monitoring components, and transmits the data to the ventilation safety monitoring box to realize real-time reporting and visualization of monitoring data; S300: The ventilation safety monitoring unit continuously analyzes and judges real-time monitoring data. When the temperature sensor at a height of 1500mm detects that the temperature parameter in the fire simulation chamber is higher than 260℃, the air supply and exhaust unit is controlled to switch from low-speed operation mode to medium-speed operation mode. When the temperature parameter in the chamber is detected to be higher than 300℃, the air supply and exhaust unit is controlled to switch to high-speed operation mode. When the oxygen concentration in the chamber is lower than 18.9VOL% or the carbon monoxide concentration is higher than 30ppm, the air supply and exhaust unit is controlled to switch directly from low-speed operation mode to high-speed operation mode. S400: When the fire simulation is large in scale and the natural air supply is insufficient to maintain the fire's continuity and reliable occurrence, the active air supply fan is activated to provide positive pressure air supply to the fire simulation chamber to ensure the stability of the fire simulation. S500: During normal fire simulation training, the gas purging unit remains closed. When the ventilation safety monitoring unit detects that the gas concentration in the cabin reaches 10% LEL, it triggers a gas concentration exceeding the standard alarm signal to remind the operator to pay attention. When the gas concentration in the cabin reaches 15% LEL, the ventilation safety monitoring unit automatically controls the gas purging unit to start operation and pump the overflowing gas to the atmosphere until the gas concentration drops below the safety threshold. S600: After the fire simulation training is completed, the ventilation safety monitoring box transmits instructions to the ventilation local control box. The ventilation local control box controls the smoke exhaust unit in the passage to start, quickly exhaust the dense smoke in the passage, restore the passage visibility, and prepare for the next training. S700: Throughout the fire simulation training, the ventilation safety monitoring box sends emergency control commands to the local ventilation control box to perform emergency start-up and shutdown operations on the air supply and exhaust unit, gas purging unit, and personnel passage smoke exhaust unit, so as to respond promptly to sudden safety situations during the training process and ensure the safety and controllability of the training operation.

[0015] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. The present invention provides a multi-functional ventilation system for simulated fire training on ships. Using a supplementary air and exhaust unit as the core execution unit of the ventilation system, it undertakes the dual functions of supplementary air and exhaust during fire simulation. The top exhaust arrangement allows for rapid removal of high-temperature smoke, preventing smoke accumulation and the risk of burns to operators, thus ensuring personal safety. Simultaneously, it continuously replenishes fresh air, maintaining cabin pressure balance, preventing oxygen deficiency, and ensuring the realism of the simulation. The system can flexibly adjust its operating status to adapt to different training intensities, providing a stable and safe environment for training.

[0016] 2. The present invention provides a multi-functional ventilation system for live-fire training in ship scenarios. Addressing the issue of gas leakage during training, it optimizes the duct layout to achieve comprehensive capture and removal of gas within the cabin. It can precisely match different gas components and adjust operating parameters according to gas density, eliminating the risk of explosion and combustion caused by gas accumulation at the source. This prevents training interruptions or safety accidents, provides a safe gas environment for live-fire training, ensures the smooth progress of training, reduces equipment maintenance costs, and improves system reliability and durability.

[0017] 3. The present invention provides a multi-functional ventilation system for live-fire training in a ship scenario. The smoke exhaust unit in the passageway can quickly remove dense smoke from the passageway, restore passage conditions and environmental conditions, can start up and operate quickly, extract dense smoke from the passageway, improve visibility, avoid obstructing personnel passage, reduce the residue of harmful gases, and prepare for subsequent training.

[0018] 4. The present invention provides a multi-functional ventilation facility for live-fire training in a ship scenario. The ventilation safety monitoring unit serves as the "brain" of the ventilation system, undertaking the responsibilities of data monitoring, anomaly warning, and command control. It can collect cabin temperature, gas concentration, and operational data of each unit in real time, accurately judge anomalies and provide early warnings, resist high temperature and electromagnetic interference, ensure accurate and timely data, and provide a visual interface for easy intervention and adjustment by operators, reducing the difficulty of operation, providing support for system maintenance and optimization, and ensuring the stable and safe operation of the ventilation system.

[0019] 5. This invention provides a multi-functional ventilation system for live-fire training on ships. Through the coordinated operation of an air supply and exhaust unit, a gas removal unit, a channel smoke extraction unit, and a ventilation safety monitoring unit, a complete closed-loop ventilation safety assurance system is formed. The ventilation safety monitoring unit collects real-time data on cabin temperature, gas concentration, and the operation of each unit, accurately identifies anomalies, and issues control commands. The air supply and exhaust unit adjusts its operating status promptly to achieve coordinated air supply and exhaust. The gas removal unit quickly removes overflowing gas to eliminate safety hazards. The channel smoke extraction unit efficiently cleans up dense smoke after training. The four components work together to achieve full-process control from monitoring to early warning to handling to completion, improving the accuracy and efficiency of system operation, adapting to complex training conditions, reducing operational intensity, minimizing equipment wear and energy consumption, and ensuring the safe, orderly, and efficient progress of live-fire training. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a multifunctional ventilation system for live-fire training on a ship, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the air supply and exhaust unit of a multi-functional ventilation system for live fire training on a ship, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the gas removal unit of a multifunctional ventilation facility for live fire training on a ship, according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the personnel passage smoke exhaust unit of a multifunctional ventilation facility for live fire training on a ship, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the ventilation safety monitoring unit of a multifunctional ventilation facility for live fire training on a ship, according to an embodiment of the present invention. Figure 6 This is a control diagram of a ventilation safety monitoring unit for a multifunctional ventilation facility for live-fire training on a ship, according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the control logic of a multi-functional ventilation system for live fire training on a ship, according to an embodiment of the present invention. Figure 8 This is a flowchart illustrating a multifunctional ventilation method for live-fire training in a shipboard scenario, according to an embodiment of the present invention.

[0021] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100-makeup air exhaust unit, 101-makeup air exhaust fan, 102-intake exhaust pipe, 1021-intake exhaust main pipe, 1022-intake exhaust branch pipe, 103-exhaust grille, 104-exhaust pipe, 105-natural makeup air grille, 106-active makeup air fan, 200-gas purging unit, 201-gas purging fan, 2 02-Gas purging pipeline, 2021-Gas purging main pipeline, 2022-Gas purging branch pipeline, 203-Purging grille, 300-Personnel passage smoke exhaust unit, 301-Passage smoke exhaust fan, 302-Passage smoke exhaust pipeline, 303-Passage smoke exhaust grille, 400-Ventilation safety monitoring unit, 401-Temperature sensor group, 402-Concentration sensor group, 403-Ventilation safety monitoring box, 404-Ventilation local control box. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] In this patent, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0026] Example 1 like Figure 1-7As shown, this embodiment of the invention provides a multi-functional ventilation system for live-fire training in a shipboard scenario, including a make-up air and exhaust unit 100, a gas scavenging unit 200, a smoke exhaust unit 300, and a ventilation safety monitoring unit 400. The make-up air and exhaust unit 100 includes a make-up air and exhaust fan 101, an intake and exhaust pipe 102, and an exhaust grille 103. The make-up air and exhaust fan 101 is installed outside the fire simulation chamber, effectively avoiding the adverse effects of the high-temperature environment inside the chamber on the fan's operational stability and service life. The intake and exhaust pipe 102 is correspondingly installed outside the fire simulation chamber. The space above the fire point is connected at its outer end to the inlet of the make-up air exhaust fan 101. Multiple air vents are spaced apart on the intake exhaust pipe 102, and each air vent is fixedly equipped with an exhaust grille 103. The make-up air exhaust unit 100 is powered by the make-up air exhaust fan 101, and the high-temperature smoke generated during the fire simulation is drawn out and discharged into the atmosphere through the intake exhaust pipe 102 and exhaust grille 103. This allows for rapid and directional discharge of the high-temperature smoke accumulated above the fire point, preventing the high-temperature smoke from lingering in the cabin and causing an abnormal rise in ambient temperature, thus ensuring the safety of the simulated fire. The training simulation is realistic and effectively protects the training equipment and structure inside the chamber from high-temperature damage, while providing a relatively safe training environment for trainees. The gas purging unit 200 includes a gas purging fan 201, a gas purging pipeline 202, and a purging grille 203. The gas purging fan 201 is located outside the fire simulation chamber, which can avoid corrosion and damage to the fan caused by the high temperature and humidity environment and flammable gas inside the chamber, reducing safety hazards. The gas purging pipeline 202 is located on the chamber wall of the fire simulation chamber, and its outer end is connected to the gas purging fan 201. The gas purging pipeline 202 is provided with multiple air vents spaced apart, and each air vent is fixedly equipped with a purging grille 203. The gas purging unit 200 is provided with extraction power by the gas purging fan 101. The gas overflowing during the fire simulation is extracted to the atmospheric environment through the gas purging pipeline 202 and the purging grille 203. It can accurately and efficiently remove the flammable gas overflowing in the cabin, prevent the gas from accumulating and forming flammable and explosive hazards, avoid the gas leakage safety risk in the real fire training process from the source, and ensure the safety and reliability of the training operation.The personnel passage smoke exhaust unit 300 includes a passage smoke exhaust fan 301, a passage smoke exhaust duct 302, and a passage smoke exhaust grille 303. The passage smoke exhaust fan 301 is located at one end of the personnel passage. The passage smoke exhaust duct 302 is located at the top of the personnel passage, with one end connected to the inlet of the passage smoke exhaust fan 301. The outlet of the passage smoke exhaust fan 301 is connected to the outside of the personnel passage. Multiple air vents are spaced apart on the passage smoke exhaust duct 302, and a passage smoke exhaust grille 303 is fixedly installed at each air vent. The personnel passage smoke exhaust unit 300... The exhaust fan 301 provides the extraction power, drawing out the large amount of dense smoke generated by the smoke generator in the personnel passage through the exhaust pipe 302 and the exhaust grille 303, and discharging it into the external atmosphere. This quickly purifies the dense smoke in the personnel passage, rapidly restoring visibility and facilitating the safe evacuation of trainees in emergencies. It also allows for rapid preparation for the next training session, effectively improving the continuity and efficiency of live-fire training. This design is suitable for the narrow and enclosed characteristics of personnel passages in naval scenarios. The ventilation safety monitoring unit 400 includes monitoring components and control components. The monitoring components include a temperature sensor 401 and a concentration sensor 402 installed inside the fire simulation chamber. These sensors are used to monitor the temperature parameters and various gas concentration parameters inside the fire simulation chamber in real time, enabling comprehensive and real-time monitoring of key parameters of the training environment. The control components include a ventilation safety monitoring box 403 and a ventilation local control box 404. The ventilation safety monitoring box 403 is electrically connected to both the monitoring components and the ventilation local control box 404. It receives and processes various parameter data collected by the monitoring components and outputs corresponding control commands to the ventilation local control box according to preset control logic. Box 404; The local ventilation control box 404 is electrically connected to the air supply and exhaust unit 100, the gas scavenging unit 200, and the personnel passage smoke exhaust unit 300, respectively. It is used to execute control commands to control the start-up, shutdown, and operating status of each ventilation unit, and can realize emergency start-up and shutdown of each ventilation unit. It achieves automated and precise control of each ventilation unit, and can adjust the operating status of each unit in real time according to changes in environmental parameters during training. It also has an emergency control function, enabling timely response to sudden safety situations during training, and improving the safety, reliability, and intelligence level of live-fire training in ship scenarios.

[0027] Furthermore, the air supply and exhaust unit 100 also includes an exhaust pipe 104. One end of the exhaust pipe 104 is sealed to the outlet of the air supply and exhaust fan 101, and the other end is connected to the exhaust trap. It is used to guide the high-temperature smoke generated during the fire simulation process pumped by the air supply and exhaust fan 101 and discharge it into the exhaust trap, thereby realizing the centralized collection and discharge of high-temperature smoke. The exhaust pipe 104 realizes the directional transportation of high-temperature smoke from the air supply and exhaust fan 101 to the exhaust trap, avoiding direct emission of high-temperature smoke that may cause thermal shock and pollution to surrounding equipment and the environment. At the same time, it realizes the centralized treatment of high-temperature smoke, improves the standardization and safety of smoke emission, adapts to the special requirements of naval scenarios for smoke emission, and ensures the safety of equipment and the cleanliness of the surrounding area during live fire training.

[0028] Furthermore, the air supply and exhaust unit 100 also includes multiple natural air supply grilles 105 and an active air supply fan 106. The multiple natural air supply grilles 105 are fixedly installed at intervals on the wall of the fire simulation chamber near the external environment. The active air supply fan 106 is fixedly installed on the wall of the fire simulation chamber near the external environment. The inlet of the active air supply fan 106 is connected to the atmospheric environment, and the outlet is connected to the interior of the fire simulation chamber. The natural air supply grilles 105 draw fresh air from the external atmosphere into the fire simulation chamber using the suction negative pressure generated by the air supply and exhaust fan 101, thus achieving natural air supply within the chamber. The active air supply fan 106... This system is designed to provide positive pressure air supply to the fire simulation chamber when the natural air supply is insufficient to sustain a continuous and reliable fire simulation. It ensures the stability of the fire simulation by employing a dual air supply method that combines natural and active air supply. The air supply mode can be flexibly adjusted according to the actual scale of the fire simulation. When the fire is small, natural air supply reduces energy consumption and saves operating costs; when the fire is large, active air supply precisely replenishes the air needed in the chamber, ensuring the continuous and stable operation of the fire simulation. Simultaneously, the replenishment of fresh air effectively improves the air quality in the chamber, ensuring the safety of training personnel and adapting to the dynamic needs of live-fire training in naval scenarios.

[0029] Furthermore, the intake and exhaust piping 102 includes an intake and exhaust main pipe 1021 and multiple intake and exhaust branch pipes 1022. The intake and exhaust main pipe 1021 and the multiple intake and exhaust branch pipes 1022 are respectively arranged in the space above the fire point. One end of the intake and exhaust main pipe 1021 is sealed to the inlet of the make-up air exhaust fan 101, and one end of each of the multiple intake and exhaust branch pipes 1022 is connected to the other end of the intake and exhaust main pipe 1021, forming a branched exhaust structure. The intake and exhaust main pipe 1021 and the multiple intake and exhaust branch pipes 1022 are spaced apart. Multiple air vents are provided, each equipped with a temperature exhaust grille 103 to facilitate the extraction of high-temperature smoke. The branched layout, combining a main pipeline with multiple branch pipelines, significantly expands the smoke extraction coverage above the fire point, ensuring that high-temperature smoke generated in different areas around the fire point can be quickly captured and extracted, preventing local smoke accumulation. At the same time, the branched structure disperses the smoke extraction pressure, improving overall extraction efficiency and adapting to the spatial layout characteristics of ship fire simulation compartments, further ensuring the timeliness and uniformity of high-temperature smoke extraction, providing a safe and stable environment for live fire training.

[0030] Furthermore, the air supply and exhaust fan 101 must pass high-temperature resistance and explosion-proof performance testing to meet the requirements for high-temperature resistance and explosion-proof use, and be suitable for high-temperature smoke and potentially flammable gas environments during fire simulation. The intake and exhaust pipe 102 is made of stainless steel, and the exhaust grille 103 is made of brass to ensure that each component is suitable for high-temperature smoke conditions. The air supply and exhaust fan 101 passing the high-temperature resistance and explosion-proof performance testing can effectively avoid safety hazards caused by high-temperature and flammable environments to the fan operation, ensuring safety. The fan operates stably for a long time; the stainless steel intake and exhaust pipes 102 have excellent high temperature resistance and corrosion resistance, which can resist the erosion of high temperature flue gas and extend the service life of the pipes; the brass exhaust grille 103 is resistant to high temperature, has good thermal conductivity and is not easily deformed. It can effectively prevent debris from entering the pipe and causing blockage, and can also adapt to high temperature flue gas extraction conditions. Overall, it improves the structural reliability, weather resistance and service life of the air supply and exhaust unit 100, which is suitable for the long-term and high-frequency use requirements of real fire training in ship scenarios and reduces equipment maintenance costs.

[0031] Furthermore, the gas purging pipeline 202 includes a main gas purging pipeline 2021 and multiple branch gas purging pipelines 2022. The multiple branch gas purging pipelines 2022 are respectively arranged in the fire simulation chamber at positions on the chamber wall other than those where the natural air supply grille 105 is installed. One end of each branch gas purging pipeline 2022 is connected to one end of the main gas purging pipeline 2021, forming a branched purging structure. The other end of the main gas purging pipeline 2021 passes through the chamber wall of the fire simulation chamber and is connected to the inlet of the gas purging fan 201. Multiple air outlets are spaced apart on the main gas purging pipeline 2021 and the multiple branch gas purging pipelines 2022. Each air outlet is fixedly equipped with a purging grille 203, and the purging grille 203 is oriented towards the fire simulation chamber to ensure the effectiveness of gas capture. By routing the gas purging branch line 2022 away from the natural air supply grille 105, interference between the two can be avoided. This ensures both the smoothness of natural air supply and the targeted nature of gas purging, preventing the introduction of external air into the gas purging line during the air supply process, which would affect the purging effect. The branched layout, combining the main line and multiple branch lines, can fully cover the effective bulkhead area of ​​the fire simulation chamber, especially accurately covering the areas around the bulkhead where gas tends to accumulate, significantly improving the gas capture range and efficiency. The purging grille 203 is positioned facing into the chamber, directly capturing any gas overflowing from inside, preventing gas from lingering on the outside of the grille, improving the timeliness of gas purging, and enhancing the operational safety and reliability of live-fire training.

[0032] Furthermore, the installation height of the gas purging branch pipe 2022 needs to be adapted to the density characteristics of the gas component it is to capture. When the gas component is gas with a density greater than air, the gas purging branch pipe 2022 is installed close to the wall of the fire simulation chamber and near the ground; when the gas component is gas with a density less than air, the gas purging branch pipe 2022 is installed close to the wall of the fire simulation chamber and near the top of the chamber. Taking propane gas as an example, since propane is denser than air, it tends to accumulate in clumps in the lower and corner areas of the fire simulation chamber. Therefore, the gas purging pipeline 202 is positioned close to the walls of the fire simulation chamber and near the ground to precisely target the gas accumulation area. By setting the installation height of the gas purging branch pipeline 2022 according to the gas density characteristics, it is possible to accurately capture and efficiently remove the overflowing gas in the chamber. This avoids the gas from being unable to be effectively captured and accumulating due to improper pipeline placement, thus preventing the flammability and explosion risks caused by the accumulation of combustible gas from the source. It is also adapted to the spatial characteristics of the ship's fire simulation chamber, ensuring the safety and reliability of the live fire training operation.

[0033] Furthermore, given the flammable and explosive nature of natural gas, the gas purging fan 201 must meet explosion-proof performance requirements and be suitable for safe operation in flammable gas environments. The gas purging pipeline 202 is made of stainless steel, and the purging grille 203 is made of brass to ensure that each component is suitable for gas purging conditions. The gas purging fan 201 meets explosion-proof requirements, effectively avoiding the ignition and explosion hazards that may be caused by the operation of the fan in flammable gas environments, ensuring the safety and stability of the fan operation, and eliminating safety risks from the power source level. The stainless steel gas purging pipeline 202 has excellent high-temperature resistance, corrosion resistance, and gas erosion resistance, which can effectively resist the corrosion of natural gas and the complex environment inside the cabin, extend the service life of the pipeline, and prevent the pipeline from being damaged and causing gas leakage to worsen. The brass purging grille 203 is high-temperature resistant, not easily deformed, and has good sealing performance, which is suitable for the long-term and high-frequency use requirements of live-fire training in ship scenarios, reducing equipment maintenance costs and ensuring the safety of live-fire training operations.

[0034] Furthermore, multiple temperature sensors 401 are provided, and these sensors are evenly distributed along the internal height of the fire simulation chamber to monitor the temperature distribution at different heights within the chamber in real time during the fire simulation. One temperature sensor 401 is positioned at a height of 1500mm inside the chamber, and the temperature data collected by this sensor serves as the core monitoring reference data. The temperature sensors 401 at other heights are only used to collect temperature data at their respective heights in real time, allowing operators to determine if there are any abnormalities in the temperature environment within the fire simulation chamber. The even distribution of multiple temperature sensors along the height of the chamber enables monitoring of the temperature distribution at different heights within the chamber. Comprehensive, all-encompassing monitoring of temperature distribution at the same altitude facilitates operators' full understanding of temperature field changes during fire simulation. By defining a temperature sensor at a height of 1500mm as the core benchmark, it provides accurate and reliable data for generating control commands for the ventilation safety monitoring unit, ensuring the accuracy of control logic for each ventilation unit. Other temperature sensors serve as auxiliary monitoring components, promptly capturing localized temperature anomalies within the cabin. This provides operators with comprehensive environmental assessment data, facilitating the timely detection and handling of potential temperature anomalies during fire simulation, enhancing the safety and controllability of live-fire training, and meeting the precise and comprehensive temperature monitoring requirements of live-fire training in naval scenarios.

[0035] Furthermore, the concentration sensor group 402 includes a gas concentration sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, and a carbon dioxide concentration sensor. The gas concentration sensor is adaptively deployed according to the density characteristics of the gas component to be monitored, and is used to monitor the gas concentration in the fire simulation chamber in real time. The carbon monoxide and oxygen concentration sensors are both deployed in the middle of the fire simulation chamber, and are used to monitor the carbon monoxide and oxygen concentrations in the fire simulation chamber in real time, respectively. The carbon dioxide concentration sensor is deployed at the top of the fire simulation chamber, and is used to monitor the carbon dioxide concentration in the fire simulation chamber in real time. By integrating multiple types of concentration sensors, a comprehensive gas monitoring system is constructed to achieve comprehensive monitoring of the concentrations of combustible gases, core harmful gases, and air components in the fire simulation chamber. It can effectively cover various abnormal gas concentration scenarios during fire simulation. Combining the physical characteristics of each gas, the sensors are deployed in a targeted manner. Among them, the gas concentration sensor is adapted to the gas density, and the other sensors are accurately positioned according to the gas distribution characteristics, which greatly improves the accuracy and timeliness of concentration monitoring data and avoids data distortion caused by improper placement. The sensors have clear division of labor and are scientifically and rationally deployed. They can provide accurate and reliable data support for the generation of control commands for the ventilation safety monitoring unit, ensuring that ventilation units such as the gas removal unit and the air supply and exhaust unit respond in a timely manner to abnormal gas concentration conditions. They can also provide operators with comprehensive and intuitive basis for judging the safety of the fire simulation environment in the cabin, effectively avoiding safety hazards such as gas accumulation, oxygen deficiency and suffocation, and excessive toxic gas, and improving the safety, controllability and intelligence level of ship-based live fire training.

[0036] Furthermore, the ventilation safety monitoring box 403 is electrically connected to the temperature sensor 401 and the concentration sensor 402 to monitor the temperature parameters and various gas concentration parameters in the fire simulation chamber in real time. The ventilation local control box 404 is electrically connected to the make-up air exhaust fan 101, the active make-up air fan 106, the gas scavenging fan 201, and the passage smoke exhaust fan 301 to execute control commands to control the start-up, stop and operation status of each fan, so as to realize the automated and precise control of each ventilation unit.

[0037] Furthermore, the ventilation safety monitoring box 403 integrates a touch screen, a programmable logic controller, and a conversion module. These components work together to form the core of the ventilation safety monitoring unit 400 for data processing, command generation, and human-machine interaction, enabling full-process processing of monitoring data and precise output of control commands. The touch screen, as a human-machine interaction terminal, can display in real-time various parameter data collected by the monitoring components, including temperature distribution data and gas concentration data within the fire simulation chamber. It can also display the operating status of each ventilation unit (make-up air and exhaust temperature unit 100, gas purging unit 200, and personnel passage smoke exhaust unit 300), the ventilation safety monitoring box 403, and the ventilation local control box 404. The system displays the working status of the ventilation system. Operators can set parameters, issue commands, query faults, and retrieve historical data via the touchscreen, enabling manual intervention and visual management of the entire ventilation system, thus improving operational convenience and intuitiveness. The programmable logic controller (PLC), as the core control unit of the ventilation safety monitoring box 403, has built-in preset control logic and threshold parameters. It establishes electrical connections with the monitoring components, conversion module, and ventilation local control box 404, respectively. It receives raw monitoring data transmitted by the monitoring components, analyzes, processes, and judges the data through built-in algorithms, and automatically generates corresponding control commands when the monitoring data exceeds the preset threshold. Simultaneously, it feeds back the data processing results to the touchscreen for display. It has high... The system boasts high reliability, anti-interference capabilities, and scalability. It allows for flexible adjustment of control logic and parameter thresholds to meet the actual needs of live-fire training, adapting to complex training conditions on ships and ensuring the accuracy and timeliness of control commands. The conversion module is used for signal conversion and adaptation. Since the signal type output by the monitoring components is inconsistent with the signal reception type of the programmable logic controller (PLC) and the touchscreen, the conversion module can convert the original analog signal output by the monitoring components into a digital signal recognizable by the PLC. Simultaneously, it converts the control commands generated by the PLC into control signals executable by the ventilation local control box 404, enabling signal communication and collaborative operation between components. Furthermore, the conversion module also possesses… The signal amplification and anti-interference processing functions can effectively suppress the impact of factors such as high temperature and electromagnetic interference in the cabin on signal transmission, ensuring the stability and accuracy of monitoring data transmission and control command issuance, and guaranteeing the reliable operation of the entire ventilation safety monitoring system. The collaborative work of each component enables the ventilation safety monitoring box 403 to not only realize the real-time acquisition, analysis and display of monitoring data, but also to complete the automatic generation and precise issuance of control commands. At the same time, it supports manual intervention by operators, forming a dual control mode of "automatic control + manual emergency", which improves the intelligence level and control accuracy of the ventilation safety monitoring system, ensuring that each ventilation unit can respond in a timely manner according to the changes in the fire simulation conditions, and effectively avoid safety hazards.Meanwhile, the visual human-computer interaction design and flexible parameter adjustment functions reduce the operational difficulty for operators, facilitating daily system maintenance, troubleshooting, and parameter optimization. This adapts to the long-term, high-frequency use requirements of live-fire training in naval scenarios, ensuring the safety and controllability of such training.

[0038] Example 2 Combination Figure 1-7 ,like Figure 8 As shown, this invention provides a multi-functional ventilation method for live-fire training in ship scenarios, implemented using a multi-functional ventilation facility for live-fire training in ship scenarios. The specific steps are as follows: S100: After the fire simulation fire training is started, the air supply and exhaust unit 100 is started and operated. The air supply and exhaust unit 100 is initially put into operation in a low-speed operation mode to achieve the initial extraction and discharge of high-temperature smoke in the early stage of the fire simulation. S200: The ventilation safety monitoring unit 400 is started simultaneously. It collects temperature parameters and various gas concentration parameters in the fire simulation chamber in real time through the monitoring components, and transmits the data to the ventilation safety monitoring box 403 to realize the real-time reporting and visualization of monitoring data. S300: The ventilation safety monitoring unit 400 continuously analyzes and judges the real-time monitoring data. When the temperature sensor at a height of 1500mm detects that the temperature parameter in the fire simulation chamber is higher than 260℃, the make-up air exhaust unit 100 is controlled to switch from low-speed operation mode to medium-speed operation mode. When the temperature parameter in the chamber is detected to be higher than 300℃, the make-up air exhaust unit 100 is controlled to switch to high-speed operation mode. When the oxygen concentration in the chamber is lower than 18.9VOL% or the carbon monoxide concentration is higher than 30ppm, the make-up air exhaust unit 100 is controlled to switch directly from low-speed operation mode to high-speed operation mode. S400: When the fire simulation is large in scale and the natural air supply is insufficient to maintain the fire's continuity and reliable occurrence, the active air supply fan 106 is activated to provide positive pressure air supply to the fire simulation chamber to ensure the stability of the fire simulation. S500: During normal fire simulation training, the gas removal unit 200 remains closed. When the ventilation safety monitoring unit 400 detects that the gas concentration in the cabin reaches 10% LEL, it triggers a gas concentration exceeding the standard alarm signal to remind the operator to pay attention. When the gas concentration in the cabin reaches 15% LEL, the ventilation safety monitoring unit 400 automatically controls the gas removal unit 200 to start operation, pumping the overflowing gas into the atmosphere until the gas concentration drops below the safety threshold. S600: After the fire simulation training is completed, the ventilation safety monitoring box 403 transmits a command to the ventilation local control box 404. The ventilation local control box 404 controls the smoke exhaust unit 300 in the passage to start, quickly exhaust the dense smoke in the passage, restore the visibility of the passage, and prepare for the next training. S700: Throughout the fire simulation training, the ventilation safety monitoring box 403 issues an emergency control command to the ventilation local control box 404 to perform emergency start-up and shutdown operations on the air supply and exhaust unit 100, gas purging unit 200, and personnel passage smoke exhaust unit 300, so as to respond to sudden safety situations during the training in a timely manner and ensure the safety and controllability of the training operation.

[0039] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional ventilation system for live-fire training in naval scenarios, characterized in that, It includes a make-up air and exhaust unit (100), a gas purging unit (200), a passageway smoke exhaust unit (300), and a ventilation safety monitoring unit (400); among which, The air supply and exhaust unit (100) includes an air supply and exhaust fan (101) and an intake and exhaust pipe (102). The air supply and exhaust fan (101) is located outside the fire simulation chamber, and the intake and exhaust pipe (102) is located in the space above the fire point. Its outer end is connected to the inlet of the air supply and exhaust fan (101) to draw out the high-temperature smoke generated during the fire simulation and exhaust it into the atmosphere. The gas purging unit (200) includes a gas purging fan (201) and a gas purging pipeline (202). The gas purging fan (201) is located outside the fire simulation chamber, and the gas purging pipeline (202) is located on the chamber wall inside the fire simulation chamber. Its outer end is connected to the inlet of the gas purging fan (201) to pump the fire simulation combustion overflow gas to the atmospheric environment. The personnel passage smoke exhaust unit (300) includes a passage smoke exhaust fan (301), a passage smoke exhaust pipe (302), and a passage smoke exhaust grille (303). The passage smoke exhaust fan (301) is installed at one end of the personnel passage. The passage smoke exhaust pipe (302) is installed at the top of the personnel passage, with one end connected to the inlet of the passage smoke exhaust fan (301). The outlet of the passage smoke exhaust fan (301) is connected to the outside of the personnel passage. The passage smoke exhaust pipe (302) is provided with multiple air vents spaced apart. Each air vent is fixedly equipped with a passage smoke exhaust grille (303) for drawing out and discharging the large amount of dense smoke generated in the personnel passage into the external atmosphere. The ventilation safety monitoring unit (400) includes a monitoring component and a control component. The monitoring component includes a temperature sensor (401) and a concentration sensor (402) for real-time monitoring of temperature parameters and various gas concentrations in the fire simulation chamber. The control component includes a ventilation safety monitoring box (403) and a ventilation local control box (404). The ventilation safety monitoring box (403) is electrically connected to the monitoring component and the ventilation local control box (404). The ventilation local control box (404) is electrically connected to the air supply and exhaust unit (100), the gas removal unit (200), and the personnel passage smoke exhaust unit (300).

2. The multi-functional ventilation system for live-fire training on ships according to claim 1, characterized in that, The air supply and exhaust unit (100) also includes an exhaust pipe (104), one end of which is sealed to the outlet of the air supply and exhaust fan (101), and the other end is connected to the exhaust trap.

3. The multi-functional ventilation system for live-fire training in a ship scenario according to claim 2, characterized in that, The air supply and exhaust unit (100) also includes multiple natural air supply grilles (105) and an active air supply fan (106). The multiple natural air supply grilles (105) are fixedly installed at intervals on the wall of the fire simulation chamber near the external environment. The active air supply fan (106) is fixedly installed on the wall of the fire simulation chamber near the external environment. The inlet of the active air supply fan (106) is connected to the atmospheric environment, and the outlet is connected to the interior of the fire simulation chamber.

4. A multi-functional ventilation system for live-fire training on ships according to claim 1, characterized in that, The intake and exhaust pipe (102) includes an intake and exhaust main pipe (1021) and multiple intake and exhaust branch pipes (1022). The intake and exhaust main pipe (1021) and multiple intake and exhaust branch pipes (1022) are respectively arranged in the space above the fire point. One end of the intake and exhaust main pipe (1021) is sealed to the inlet of the make-up air exhaust fan (101). One end of each of the multiple intake and exhaust branch pipes (1022) is connected to the other end of the intake and exhaust main pipe (1021). Multiple air outlets are spaced apart on the intake and exhaust main pipe (1021) and multiple intake and exhaust branch pipes (1022). Each air outlet is fixedly equipped with an exhaust grille (103).

5. A multi-functional ventilation system for live-fire training on ships according to claim 1, characterized in that, The gas purging pipeline (202) includes a gas purging main pipeline (2021) and multiple gas purging branch pipelines (2022). The multiple gas purging branch pipelines (2022) are respectively arranged in the fire simulation chamber at the positions of the chamber walls except for the positions where the natural air supply grilles (105) are arranged. One end of each of the multiple gas purging branch pipelines (2022) is connected to one end of the gas purging main pipeline (2021). The other end of the gas purging main pipeline (2021) passes through the chamber wall of the fire simulation chamber and is connected to the inlet of the gas purging fan (201). Multiple air outlets are spaced apart on the gas purging main pipeline (2021) and the multiple gas purging branch pipelines (2022). Each air outlet is fixedly equipped with a purging grille (203), and the purging grille (203) is arranged facing the fire simulation chamber.

6. A multi-functional ventilation system for live-fire training in a naval scenario, as described in claim 5, is characterized in that... The installation height of the gas purging branch pipe (2022) needs to be adapted according to the density characteristics of the gas component it is to capture. When the gas component is gas with a density greater than air, the gas purging branch pipe (2022) is installed close to the wall of the fire simulation chamber and near the ground. When the gas component is gas with a density less than air, the gas purging branch pipe (2022) is installed close to the wall of the fire simulation chamber and near the top of the chamber.

7. A multi-functional ventilation system for live-fire training on ships according to claim 1, characterized in that, Multiple temperature sensors (401) are provided, and the multiple temperature sensors (401) are evenly distributed along the internal height direction of the fire simulation chamber, with one of the temperature sensors (401) being placed at a height of 1500mm inside the chamber.

8. A multi-functional ventilation system for live-fire training on ships according to claim 1, characterized in that, The concentration sensor group (402) includes a gas concentration sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor and a carbon dioxide concentration sensor. The gas concentration sensor needs to be adaptively deployed according to the density characteristics of the gas components to be monitored, and is used to monitor the gas concentration in the fire simulation chamber in real time. The carbon monoxide concentration sensor and the oxygen concentration sensor are both located in the middle of the fire simulation chamber and are used to monitor the carbon monoxide concentration and oxygen concentration in the fire simulation chamber in real time, respectively. The carbon dioxide concentration sensor is installed at the top of the fire simulation chamber to monitor the carbon dioxide concentration in the chamber in real time.

9. A multi-functional ventilation system for live-fire training in a shipboard scenario according to any one of claims 1-5, characterized in that, The air supply and exhaust fan (101) must pass the high temperature resistance and explosion-proof performance test. The intake and exhaust pipe (102) is made of stainless steel and the exhaust grille (103) is made of brass. The gas scavenging fan (201) must meet the explosion-proof performance requirements, the gas scavenging pipeline (202) is made of stainless steel, and the scavenging grille (203) is made of brass.

10. A multifunctional ventilation method for live-fire training in naval scenarios, characterized in that, The method employs a multi-functional ventilation system for live-fire training in a ship scenario, as described in any one of claims 1-7, characterized by comprising the following steps: S100: After the fire simulation fire training is started, the control air supply and exhaust unit (100) is started and operated. The air supply and exhaust unit (100) is initially put into operation in low speed mode to realize the initial extraction and discharge of high temperature smoke in the early stage of fire simulation. S200: The ventilation safety monitoring unit (400) is started synchronously. It collects temperature parameters and various gas concentration parameters in the fire simulation chamber in real time through the monitoring components and transmits the data to the ventilation safety monitoring box (403) to realize the real-time reporting and visualization of monitoring data; S300: The ventilation safety monitoring unit (400) continuously analyzes and judges the real-time monitoring data. When the temperature sensor at a height of 1500mm detects that the temperature parameter in the fire simulation cabin is higher than 260℃, the make-up air exhaust unit (100) is controlled to switch from low-speed operation mode to medium-speed operation mode. When the temperature parameter in the cabin is detected to be higher than 300℃, the make-up air exhaust unit (100) is controlled to switch to high-speed operation mode. When the oxygen concentration in the cabin is detected to be lower than 18.9VOL% or the carbon monoxide concentration is higher than 30ppm, the make-up air exhaust unit (100) is controlled to switch directly from low-speed operation mode to high-speed operation mode. S400: When the fire simulation is large in scale and the natural air supply is insufficient to maintain the fire's continuity and reliable occurrence, the active air supply fan (106) is activated to provide positive pressure air supply to the fire simulation chamber to ensure the stability of the fire simulation. S500: During the normal conduct of fire simulation training, the gas purging unit (200) remains closed. When the ventilation safety monitoring unit (400) detects that the gas concentration in the cabin reaches 10% LEL, it triggers a gas concentration exceeding the standard alarm signal to remind the operator to pay attention. When the gas concentration in the cabin reaches 15% LEL, the ventilation safety monitoring unit (400) automatically controls the gas purging unit (200) to start operation and pump the overflowing gas to the atmospheric environment until the gas concentration drops below the safety threshold. S600: After the fire simulation fire training is completed, the ventilation safety monitoring box (403) transmits the command to the ventilation local control box (404), and the ventilation local control box (404) controls the smoke exhaust unit (300) in the passage to start, quickly exhaust the dense smoke in the passage, restore the visibility of the passage, and prepare for the next training. S700: During the entire fire simulation training process, the ventilation safety monitoring box (403) issues an emergency control command to the ventilation local control box (404) to perform emergency start and stop operations on the air supply and exhaust unit (100), gas purging unit (200), and personnel passage smoke exhaust unit (300), so as to respond to sudden safety situations during the training process and ensure the safety and controllability of the training operation.

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