Large-space gas fire extinguishing system test platform and method

Abstract

The invention relates to a large-space gas fire extinguishing system test platform, which comprises a large-space platform main body, a fire detection system, a gas fire extinguishing system and a control system, the control system comprises a server and a control program stored in the server, when the control program is executed, whether a fire occurs and the type of the fire are judged, and if yes, the gas fire extinguishing system is started. And then a fire extinguishing strategy is generated, the fire extinguishing system is controlled to extinguish fire, whether reburning occurs or not is judged, and finally fire extinguishing is completed. A large-space fire extinguishing system test platform is constructed, multiple parameters are fused and verified mutually, accurate measurement of fire scene parameters and accurate judgment of the fire scene state are achieved, multi-point-position three-dimensional measurement is achieved through a small number of sensors, detailed data of fire scene spatial-temporal characteristic parameters near a fire source are conveniently obtained, and the fire extinguishing effect is improved. And the fire extinguishing effectiveness test of the multi-mode fire extinguishing system of global submerging and local fire extinguishing can be simultaneously carried out.

Description

Technical Field

[0001] This invention belongs to the field of fire safety technology, specifically relating to a test platform and method for a large-space gas extinguishing system. Background Technology

[0002] With the rapid development of society and the economy, the number of large-space buildings such as vaults, data centers, and large warehouses continues to grow. These buildings, due to their open interior spaces, limited fire compartmentation, and concentrated distribution of combustible materials, are highly susceptible to rapid fire spread, causing significant casualties and property damage. According to relevant fire protection design standards in my country, these locations are required to be equipped with fire suppression systems. While water sprinkler systems are widely used, their susceptibility to water damage makes them unsuitable for critical locations with stringent environmental requirements, such as computer rooms, important libraries and archives, mobile communication base stations (rooms), and UPS rooms. Therefore, gaseous fire suppression systems have become the core fire protection solution for these types of locations.

[0003] Currently, mainstream hydrofluoroalkane (HFC) gaseous fire extinguishing agents (such as heptafluoropropane) are being phased out globally due to environmental concerns. Existing alternatives fall short of ideal performance in key areas such as fire extinguishing efficiency, fire toxicity and corrosiveness control, transport stability, and storage safety, significantly lagging behind practical application requirements. Against this backdrop, the development of new gaseous fire extinguishing agents and systems has become a focal point of global competition in the fire protection field. Technological breakthroughs in this area directly impact my country's influence in the international gaseous fire extinguishing industry and represent a crucial strategic development direction for the nation's fire protection technology sector.

[0004] Standardized testing platforms are core supporting tools in the research and development of new gaseous fire extinguishing agents and systems. Both the US UL standard and the European EN standard clearly specify the architectural space parameters, fire source system configuration, and measurement system accuracy of the testing platform. my country's latest standard, GB25972-2024, "Gaseous Fire Extinguishing Systems and Components," also references international standards and proposes corresponding technical requirements. Meanwhile, numerous patents related to fire testing devices and platforms have been published both domestically and internationally; however, these patents still have significant technical shortcomings and are insufficient to meet the research and testing needs of large-space scenarios.

[0005] From the perspective of spatial adaptability, while existing patents have addressed the needs of large-space experiments, they have not resolved core technological bottlenecks. For example, CN117116130A proposes a large-scale hydraulic liftable ceiling fire experimental device, which adjusts the height of different spaces through ceiling lifting and can build various fire research experimental platforms. However, it does not specify the platform's specific volume parameters and does not address key issues such as sensor deployment density, deployment method, and data synchronization in large spaces, remaining limited to adaptability to conventional-scale experimental scenarios. CN118079299A discloses a multi-protection zone gas extinguishing test process platform, which only optimizes the test process by monitoring the remaining extinguishing agent in the cylinder and automatically starting the nozzle. Its test space scale has not broken through the traditional limitation of 100-200m³, and it cannot simulate the diffusion law of extinguishing agent in large spaces of 3000m³ or more. The modular large-space building fire safety experimental device (CN115148084A) proposed by Hebei University of Engineering achieves flexible assembly and reuse of space through modular design. However, the core of the device is to solve the problems of experimental cost and resource waste. It does not design a parameter monitoring system adapted to the special characteristics of gas extinguishing test for large spaces.

[0006] In terms of fire situation assessment and parameter measurement, existing patents still suffer from insufficient accuracy and limited dimensions. CN115713831A proposes a cable tunnel fire monitoring method based on multiple parameters such as temperature, CO concentration, and smoke concentration. This method improves the accuracy of fire situation assessment through data fusion. However, this method is designed for cable tunnel scenarios, and the monitoring parameters do not cover core indicators of gas extinguishing tests such as extinguishing agent concentration, spray quality, and heat flux intensity. Furthermore, the layout of measurement points does not consider the field distribution characteristics of large spaces, does not address the comprehensive parameter monitoring requirements of large testing platforms, and fails to solve the problem of scientifically determining the risk of fire reignition.

[0007] In summary, the common shortcomings of existing testing platforms can be summarized in the following three aspects:

[0008] Insufficient accuracy in fire assessment: Existing testing platforms and related patents mainly rely on temperature and oxygen concentration parameters to determine the fire extinguishing effect. For example, conventional platforms only have three oxygen concentration measuring points at heights of 0.1H, 0.5H, and 0.9H above the ground, and at a horizontal distance of 850mm-1250mm from the center of the test space. Only one temperature measuring point is set at the 0.5H height and at a horizontal distance of 850mm-1250mm from the center of the test space. Even though some patents introduce multi-parameter monitoring (such as CN115713831A), the measuring point layout is not optimized for gas extinguishing scenarios, failing to comprehensively reflect the temperature and concentration field distribution within the test space. This results in a lack of scientific basis for key judgments such as whether the fire source is completely extinguished, the definition of the critical time point for fire extinguishing, and the assessment of reignition risk.

[0009] Lack of spatial adaptability: Existing standards only require the test platform to have a volume of no less than 100m³, and the industry generally uses platforms of 100-200m³, with published patents not exceeding this size limit. However, the volume of a single space in actual protection scenarios such as large data centers, libraries, and archives has reached 1000m³ or even exceeded 3000m³. Test results from small-volume platforms cannot accurately reflect the diffusion patterns and extinguishing effectiveness of fire extinguishing agents in large spaces. Furthermore, large-space test platforms are not simply scaled-up versions; core technical issues such as sensor deployment density, fire extinguishing agent concentration gradient control, judgment indicators, and test methods have not been effectively resolved in existing patents.

[0010] Insufficient Parameter Measurement Dimensions: Existing platforms and most related patents can only monitor basic parameters such as temperature, oxygen concentration, and nozzle pressure. However, the development of new fire extinguishing agents and systems requires measuring as many key parameters as possible at the fire scene, such as obtaining multi-dimensional data on fire extinguishing agent concentration distribution, spray quality, concentration of harmful gases such as CO, dynamic changes in flow rate, indoor air pressure and humidity gradients, and heat flux intensity. The lack of multiple parameters leads to a lack of cross-validation for fire scene condition assessment. Especially in large-space scenarios, the lack of optimized sensor layout and accurate measurement technology for all parameters has become a major bottleneck restricting the development of new fire extinguishing systems. Summary of the Invention

[0011] To address the shortcomings of existing technologies, this invention provides a testing platform for large-space gas fire extinguishing systems, solving the technical problems of the lack of a dedicated testing platform for large-space gas fire extinguishing systems, the limited parameters of gas fire extinguishing system testing methods, and insufficient spatial information of parameters in existing technologies.

[0012] To achieve the above objectives, the present invention provides a test platform for a large-space gas fire extinguishing system, comprising:

[0013] The platform body has a large internal space, and an ignition system is installed at the bottom of the large space. The ignition system includes fuel and a burner.

[0014] A fire detection system, comprising a multi-parameter sensing system and an image acquisition device, wherein the multi-parameter sensing system includes fixed integrated sensors and mobile integrated sensors arranged in a grid pattern in a large space, for real-time measurement and acquisition of multiple parameters of the fire.

[0015] A gaseous fire extinguishing system includes a gaseous fire extinguishing agent storage system and a gaseous fire extinguishing agent release and distribution system. The gaseous fire extinguishing agent release and distribution system is used to release the gaseous fire extinguishing agent from the gaseous fire extinguishing agent storage system to the fire source for fire extinguishing. The gaseous fire extinguishing agent release and distribution system includes pressure-measurable and angle-adjustable nozzles.

[0016] The control system includes a server and a control program stored in the server. When the control program is executed, it performs the following steps:

[0017] S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred and to identify the type of fire;

[0018] S2, if a fire occurs, generate a fire extinguishing strategy and output the fire extinguishing strategy to the gas fire extinguishing system, and control the release and distribution unit of the gas fire extinguishing system to release the gas fire extinguishing agent from the gas fire extinguishing agent storage unit to the fire source for fire extinguishing.

[0019] S3: Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishing conditions. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishing condition is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the control program is stopped from continuing to execute.

[0020] S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel is completely burned. If not, the fire is extinguished.

[0021] In some of these embodiments, the volume of the large space is not less than 1000 m³. 3 More preferably, not less than 3000m 3 This is to fully simulate the large spaces of large data centers, libraries, and archives.

[0022] In some embodiments, both fixed and / or mobile integrated sensors include integrated sensors, such as extinguishing agent concentration sensors, carbon monoxide concentration sensors, oxygen concentration sensors, smoke concentration sensors, temperature sensors, heat flow sensors, pressure sensors, and wind speed sensors, to obtain comprehensive fire parameter data and accurately determine the fire situation.

[0023] In some implementations, the multi-parameter sensing system also includes a slide rail along which a movable integrated sensor can move.

[0024] Preferably, the slide rail is configured as a grid-like slide rail, and the mobile integrated sensor further includes a sliding telescopic device. The sliding telescopic device comprises a pulley assembly and a telescopic assembly. Multiple integrated sensors with adjustable spacing are mounted on the telescopic assembly. The telescopic assembly is connected to the pulley assembly and moves by being suspended from the grid-like slide rail via the pulley assembly. The collaboration between the grid-like slide rail and the mobile integrated sensor with the telescopic assembly sliding within the grid-like slide rail facilitates the acquisition of detailed data on fire scene spatial parameters such as temperature and concentration fields in large spaces.

[0025] In some embodiments, the telescopic assembly can be configured as a telescopic sleeve structure, with an integrated sensor mounted on the exterior of each sleeve section. The signal and power lines of the integrated sensors can be connected to the control system through the interior of the telescopic sleeve. In preferred embodiments, the telescopic assembly can be configured as a rhomboid telescopic structure, with integrated sensors disposed at joint nodes between several sets of rhomboid structures. The signal and power lines of the integrated sensors can be connected to the control system through wiring within the rhomboid structures. All of the above telescopic assembly structures allow for adjustable spacing between the multiple integrated sensors on the telescopic assembly, thereby obtaining an integrated sensor array with a suitable spacing distribution in the vertical direction.

[0026] Obviously, in some of these implementations, the integrated sensor can also be connected to the control system via wireless communication, which can be one or more of ZigBee, WirelessHART, LoRa, NB-IoT, and BLE.

[0027] In some of these implementations, the integrated sensor may also utilize a mobile power source.

[0028] In some embodiments, the pulley assembly includes a pulley and a drive unit, which may be a drive motor. Further, the drive unit includes a position control unit, which receives the fire source position determined by the control system and causes the drive unit to move the pulley along the slide rail to the fire source position. The position control unit may employ PID control.

[0029] In some implementations, the platform's main structure includes a building body, which is a portal reinforced concrete structure comprising load-bearing columns, beams, walls, a floor, and a roof. The load-bearing columns and beams are reinforced concrete structures of 80 cm x 80 cm or more. The walls are constructed of fire-resistant bricks with a thickness of 60 cm or more, and the inner and outer surfaces are plastered with concrete to a thickness of 10 mm or more, with a compressive strength of 3000 Pa or more. The roof is a reinforced concrete structure of 15 cm or more, with a compressive strength of 1800 Pa or more and a load capacity of 2500 Pa or more. The floor is a reinforced concrete structure of 30 cm or more, and the foundation pits for the load-bearing columns are at least 1.6 m deep. This ensures that the building structure can withstand high temperatures, smoke pressure, and the impact of extinguishing agents during testing, preventing structural deformation, collapse, or cracking.

[0030] In some embodiments, a large-space gas fire extinguishing system test platform further includes a ventilation and smoke exhaust system. This system includes smoke exhaust outlets distributed on the upper part of the building's main walls, smoke exhaust ducts connected to the outlets, and the ducts connected to one or more high-power smoke exhaust fans. Preferably, the smoke exhaust ducts and fans are made of high-temperature resistant fireproof materials. Preferably, the smoke exhaust fans are located in a dedicated machine room on the perimeter of the building and their airflow can be adjusted via a frequency converter. Preferably, all smoke exhaust fans are connected to a control system.

[0031] In some embodiments, a large-space gas fire extinguishing system test platform also includes an alarm system, which includes an audible and visual alarm, a broadcast system, and an evacuation indicator. The alarm system is configured to receive a signal from the control system that indicates a fire has occurred and issue an alarm.

[0032] In some embodiments, the gaseous extinguishing agent storage system includes multiple storage cylinders for storing extinguishing agent gas. Multiple storage cylinders are stored in an external dedicated equipment room, and the extinguishing gas is not limited to heptafluoropropane or inert gases such as carbon dioxide. Furthermore, weight sensors are installed below the storage cylinders, and these sensors are communicatively connected to the control system to transmit the gas consumption and gas consumption rate values ​​from the storage cylinders to the control system in real time.

[0033] Furthermore, each high-pressure storage cylinder is equipped with a pressure regulating valve and a safety relief device to ensure sufficient extinguishing agent volume and release pressure for large-space applications. Additionally, the storage cylinders are arranged in an array and interconnected via manifolds to form a redundant supply network, ensuring system operation even in the event of a single cylinder failure.

[0034] In some embodiments, the gaseous extinguishing agent release and distribution system includes extinguishing agent piping and nozzles. The extinguishing agent piping includes internal and external piping. The internal piping is fixed to the roof of the platform structure and extends in an "I" shape. The density of the internal piping can be increased according to the building area to ensure adequate coverage of the space. The extinguishing agent is introduced into the interior from the outdoor external piping, connecting with the internal piping and entering the pipeline network.

[0035] In a preferred embodiment, the sprinkler head is an angle-controllable sprinkler head, installed at the end of the "I"-shaped structure of the internal piping, and no more than 0.5m from the roof surface. The number of sprinklers installed is determined based on the maximum sprinkler head protection area. In some embodiments, the sprinkler head is equipped with a pressure sensor. In some embodiments, the control system controls the fixing or turning direction of the sprinkler head and the spray pressure according to the calculated fire extinguishing strategy.

[0036] In some implementations, the control system further includes a control cabinet that communicates with the fire detection system, the gas extinguishing system, and the server. Furthermore, the control cabinet also communicates with the ignition system, the ventilation and smoke extraction system, and the alarm system. The control cabinet can acquire sensor electrical signals transmitted by the fire detection system through internal interfaces (analog and / or digital interfaces), convert them into fire parameter data or values ​​recognizable by the server, and transmit the processed fire parameter data or values ​​to the control program on the server via wired or wireless communication modules for fire judgment calculation and feedback control. When the control program on the server issues instructions based on calculations, the control cabinet receives the instructions and converts them into control signals, such as controlling core equipment of the gas extinguishing system like solenoid valves, nozzle drive motors, and gas release valves, or controlling the start / stop and power of the ignition source in the ignition system, the start / stop and variable frequency speed control of the fans in the ventilation and smoke extraction system, the solenoid valves, and the alarm system response.

[0037] In some embodiments, step S3 further includes a movement step of focusing the mobile integrated sensor on the fire source.

[0038] In some implementations, the fusion calculation in step S1 is configured to determine whether at least two of the following conditions are met, and if so, to determine that a fire has occurred:

[0039] (1) The optical density of the smoke output by the smoke concentration sensor is 0.3-2.0%obs / m;

[0040] (2) The image acquisition device identified a flame;

[0041] (3) Manual alarm;

[0042] (4) The highest temperature output by the temperature sensor is greater than 50℃;

[0043] (5) The highest temperature output by the temperature sensor is more than 20°C higher than the ambient temperature.

[0044] (6) The maximum heat flux output by the heat flow sensor is greater than 5kW / m 2 ;

[0045] (7) The rate of increase of the heat flux output by the heat flow sensor is greater than 2kW / m 2 / min. In some implementations, the fusion calculation in step S3 is configured to determine whether the following conditions are met simultaneously, and if so, the state is determined to be fire extinguished:

[0046] (1) The average temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing;

[0047] (2) The highest temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing;

[0048] (3) The image acquisition device identified no flames;

[0049] (4) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or increasing;

[0050] (5) The lowest oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or rising;

[0051] (6) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing;

[0052] (7) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing;

[0053] (8) The average heat flux output by the heat flow sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing;

[0054] (9) The maximum heat flux output by the heat flux sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing;

[0055] (10) If the fuel is solid fuel, the following criterion shall be added: the remaining mass of the combustor shall not decrease relative to the time 5, 10 and 20 seconds prior.

[0056] In some implementations, the fusion calculation in step S4 is configured to determine whether the following conditions are met simultaneously, and if so, it is determined that reignition will not occur:

[0057] (1) The image acquisition device identified no flames;

[0058] (2) The highest temperature output by the temperature sensor is below 60℃;

[0059] (3) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or increasing;

[0060] (4) The lowest concentration output by the oxygen concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, decreases by no more than 0.2%, and at least two of these time points are stable or rising;

[0061] (5) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or decreasing;

[0062] (6) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, does not increase by more than 2%, and at least two of these time points are stable or decreasing;

[0063] (7) If the fuel used in the test is solid fuel, the following criterion shall be added: the remaining mass of the combustible material shall not decrease relative to the time before 1 minute, 3 minutes and 5 minutes.

[0064] Another aspect of the present invention provides a testing method for a large-space gas fire extinguishing system, comprising the following steps:

[0065] Before step S1, activate the fire detection system using fixed integrated sensors and / or mobile integrated sensors.

[0066] Collect fire parameter data, including extinguishing agent concentration, carbon monoxide concentration, oxygen concentration, temperature, smoke concentration, and heat flow, and acquire images of the fire source using an image acquisition device.

[0067] And / or, select the fuel and the burner ignition method and power;

[0068] S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred;

[0069] S2, if a fire occurs, a fire extinguishing strategy is generated and output to the gas extinguishing system. The release and distribution unit of the gas extinguishing system is controlled to adjust the spray pressure and spray angle of the nozzles, and the gas extinguishing agent in the gas extinguishing agent storage unit is released to the fire source for fire extinguishing. The fire extinguishing strategy includes global flooding fire extinguishing or local fire extinguishing.

[0070] S21. If the fire extinguishing strategy adopts global flooding fire extinguishing, then monitor the opening and closing times of all nozzles, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate.

[0071] S22, If the fire extinguishing strategy adopts local fire extinguishing, then monitor the opening and closing times of all nozzles, spray angle, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate.

[0072] S3. Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishment. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishment status is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the test method is stopped.

[0073] S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel is completely burned. If not, the fire is extinguished.

[0074] If step S3 determines that the fire has been extinguished for more than 10 minutes, then step S31, which determines the failure of fire extinguishing, is also included after step S3:

[0075] (1) If the spray pressure value is 0, it is determined that the extinguishing agent was not sprayed, resulting in the failure of extinguishing;

[0076] (2) If the spray pressure value is greater than 0 but less than the preset value, it is determined that the extinguishing agent spray pressure is insufficient, resulting in extinguishing failure.

[0077] (3) If the spray pressure value is greater than or equal to the preset value, but the extinguishing agent concentration does not reach the preset value, it is determined that the extinguishing agent concentration is not up to standard, resulting in extinguishing failure.

[0078] (4) If the spray pressure value is greater than or equal to the preset value and the extinguishing agent concentration exceeds the preset value, it is determined that the extinguishing agent has failed, resulting in extinguishing failure.

[0079] Implementing the technical solution of the present invention has at least the following beneficial effects:

[0080] 1. This invention constructs a test platform for a large-space fire extinguishing system, wherein the volume of the large space is not less than 1000 m³. 3 To fully simulate the large spaces of large data centers and library archives, to realistically reflect the temperature and concentration fields of large spaces, and to map the diffusion patterns and extinguishing effectiveness of fire extinguishing agents in large spaces.

[0081] 2. The fire detection system of this invention includes a fire extinguishing agent concentration sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, a smoke concentration sensor, a temperature sensor, a heat flow sensor, a pressure sensor, a wind speed sensor, and an image acquisition device. Compared with the prior art, which mainly relies on a few parameters such as temperature, oxygen concentration, and smoke concentration for fire determination, resulting in data distortion and inability to accurately determine the fire status, especially fire reignition, this invention integrates multiple parameters and cross-verifies them to achieve accurate measurement of fire parameters and accurate determination of the fire status. This enables comprehensive monitoring, storage, and calculation analysis of fire information, and allows for accurate determination of the fire status.

[0082] 3. The multi-parameter sensing system of the present invention includes fixed integrated sensors and mobile integrated sensors arranged in a grid pattern in a large space, a grid-arranged slide rail and a mobile integrated sensor with a telescopic component sliding in the grid-arranged slide rail, and multiple integrated sensors with adjustable spacing set on the telescopic component. It extends traditional single-point or area measurement data to multi-parameter spatial three-dimensional fire data, realizes three-dimensional measurement of multiple points with a small number of sensors, and facilitates obtaining detailed data of the spatiotemporal characteristic parameters of the fire scene near the fire source.

[0083] 4. Compared to test platforms that can only evaluate a single flooding fire suppression system, the test platform of this invention can simultaneously evaluate the fire suppression effectiveness of multi-mode fire suppression systems that combine global flooding and local fire suppression.

[0084] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0085] Figure 1 A general schematic diagram of a test platform for a large-space gas fire extinguishing system provided for some exemplary embodiments of this application;

[0086] Figure 2 A schematic diagram of the positional layout of a fixed integrated sensor provided as an example of some embodiments of this application;

[0087] Figure 3A schematic diagram of a movable integrated sensor and slide rail layout is provided for some exemplary embodiments of this application;

[0088] Figure 4 Schematic diagrams of gas fire extinguishing systems provided as exemplary embodiments of this application;

[0089] Figure 5 A block diagram of a large-space gas fire extinguishing system test system provided for some exemplary embodiments of this application;

[0090] Figure 6 A flowchart illustrating a test method for a large-space gas fire extinguishing system, provided as an example of some embodiments of this application.

[0091] Figure label:

[0092] 10-Platform Main Body;

[0093] 11-Ground; 12-Wall; 13-Load-bearing column; 14-Roof;

[0094] 20 - Fire detection system;

[0095] 21-Fixed integrated sensor; 22-Mobile integrated sensor; 23-Image acquisition device; 24-Slide rail;

[0096] 30 - Gas fire suppression system;

[0097] 31-Gas extinguishing agent release and distribution system; 311-Nozzle; 32-Gas extinguishing agent storage system;

[0098] 40 - Control System;

[0099] 41-Server; 42-Control cabinet;

[0100] 50 - Alarm system;

[0101] 60 - Ventilation and smoke extraction system;

[0102] 70 - Ignition system. Detailed Implementation

[0103] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0104] Those skilled in the art should understand that the following specific embodiments or implementation methods are a series of optimized configurations listed to further explain the specific content of the invention. These configuration methods can be combined or used in conjunction with each other, unless the invention explicitly states that some or a specific embodiment or implementation method cannot be associated with or used in conjunction with other embodiments or implementation methods. Furthermore, the following specific embodiments or implementation methods are merely optimized configurations and are not intended to limit the scope of protection of the invention.

[0105] like Figure 1 As shown, in some embodiments of this application, a large-space gas fire extinguishing system test platform is provided, including: platform body 10, fire detection system 20, gas fire extinguishing system 30 and control system 40.

[0106] The platform main body 10 includes the building structure, which is a portal reinforced concrete structure, comprising load-bearing columns 13, beams, walls 12, a floor 11, and a roof 14. The load-bearing columns and beams are 80 cm x 80 cm reinforced concrete structures. The walls are constructed of fire-resistant bricks with a thickness of 60 cm, and the inner and outer surfaces are plastered with 10 mm of concrete. The walls have a compressive strength greater than 3000 Pa. The roof is a 15 cm thick reinforced concrete structure with a compressive strength greater than 1800 Pa and a load capacity greater than 2500 Pa. The floor is a 30 cm thick reinforced concrete structure. The foundation pit for the load-bearing columns is 1.6 m deep. The testing process ensures that the building structure can withstand loads such as high temperatures, smoke pressure, and fire extinguishing agent impacts, preventing structural deformation, collapse, or cracking.

[0107] The building's interior forms a large space with a volume of no less than 1000m². 3 More preferably, not less than 3000m 3 This is to fully simulate the large spaces of large data centers, libraries, and archives.

[0108] An ignition system 70 is installed at the bottom of the large space. The ignition system includes fuel and a burner. Optionally, the fuel is wood, liquid fuel, plastic, etc., and the burner is an open flame ignition burner, an electric hot spot ignition burner, or an electric arc ignition burner, etc.

[0109] The fire detection system 20 includes a multi-parameter sensing system and an image acquisition device 23. The multi-parameter sensing system includes fixed integrated sensors 21 and mobile integrated sensors 22 arranged in a grid pattern in a large space. In some embodiments, the image acquisition device 23 can be a camera; further, it can be an AI camera. The AI ​​cameras are arranged according to the floor area of ​​the large space, with each 100m²... 2At least one AI camera should be installed inside the room, with one additional camera installed at each of the four corners of the room. The AI ​​camera can make a preliminary judgment on the flame through image recognition.

[0110] like Figure 2 , 3 As shown, both fixed and / or mobile integrated sensors include integrated sensors, such as extinguishing agent concentration sensors, carbon monoxide concentration sensors, oxygen concentration sensors, smoke concentration sensors, temperature sensors, heat flow sensors, and wind speed sensors. These sensors are used to measure and collect multiple parameters of a fire in real time, obtaining comprehensive fire parameter data and accurately determining the fire situation.

[0111] For example, to ensure test accuracy, the fire extinguishing agent concentration sensor has a resolution of not less than 0.1% (volume fraction) and a range of not less than 0%-5%, and can continuously collect and record the heptafluoropropane concentration in the test space during the test.

[0112] The carbon monoxide concentration measurement sensor has a resolution of no less than 0.01% (volume fraction) and a range of no less than 0%-10%, and can continuously collect and record the carbon monoxide concentration in the test space during the test.

[0113] The oxygen concentration measurement sensor has a resolution of no less than 0.1% (volume fraction) and a range of no less than 10%-22%, and can continuously collect and record the oxygen concentration in the test space during the test.

[0114] The flue gas concentration sensor has a resolution of no less than 5% and a measurement range of no less than 0-500 mg / m3, and can continuously collect and record the flue gas concentration in the test space during the test.

[0115] The temperature sensor has a resolution of no less than 0.1℃, and a measurement range of no less than -20℃ to 1200℃. It can continuously collect and record the temperature in the test space during the test.

[0116] The heat flux sensor has a resolution better than 3% and a measurement range of not less than 0-30 MW / m. 2 It can continuously collect and record the radiative heat flux value in the test space during the test.

[0117] The wind speed sensor has a resolution of 0.1 m / s and a range of not less than 0-10 m / s, and can continuously collect and record the wind speed in the test space during the test.

[0118] The multi-parameter sensing system also includes a slide rail 24, along which a movable integrated sensor can move.

[0119] Figure 3The central slide rail is configured as a grid-like slide rail. The mobile integrated sensor also includes a sliding telescopic device, which comprises a pulley assembly and a telescopic assembly. Multiple integrated sensors with adjustable spacing are mounted on the telescopic assembly. The telescopic assembly is connected to the pulley assembly and moves by being suspended from the grid-like slide rail via the pulley assembly. The collaboration between the grid-like slide rail and the mobile integrated sensor with the telescopic assembly sliding within it facilitates the acquisition of detailed data on fire scene spatial parameters such as temperature and concentration fields in large spaces.

[0120] Optionally, the telescopic assembly can be configured as a telescopic sleeve structure, with an integrated sensor mounted on the exterior of each sleeve section. The signal and power lines of the integrated sensor can be connected to the control system through the interior of the telescopic sleeve. Optionally, the telescopic assembly can be configured as a diamond-shaped telescopic structure, with integrated sensors positioned at the joint nodes between several sets of diamond structures. The signal and power lines of the integrated sensor can be routed through the diamond structures to connect to the control system. All of the above telescopic assembly structures allow for adjustable spacing between the multiple integrated sensors on the telescopic assembly, thereby obtaining an integrated sensor array with a suitable spacing distribution in the vertical direction.

[0121] Obviously, in some embodiments, the integrated sensor can also be connected to the control system via wireless communication, which can be one or more of ZigBee, WirelessHART, LoRa, NB-IoT, and BLE.

[0122] Optionally, the integrated sensor can also be powered by a mobile power source.

[0123] Optionally, the pulley assembly includes a pulley and a drive unit, which can be a drive motor. Further, the drive unit includes a position control unit, which receives the fire source position determined by the control system and causes the drive unit to move the pulley along the slide rail to the fire source position. The position control unit can employ PID control.

[0124] The gas extinguishing system 30 includes a gas extinguishing agent storage system 32 and a gas extinguishing agent release and distribution system 31. The gas extinguishing agent release and distribution system is used to release the gas extinguishing agent from the gas extinguishing agent storage system to the fire source for extinguishing.

[0125] The gaseous extinguishing agent release and distribution system includes extinguishing agent pipelines and nozzles. In some embodiments, the extinguishing agent pipelines include internal and external pipelines. The internal pipelines are fixed to the roof of the platform body and extend in an "I" shape. The density of the internal pipelines can be increased according to the building area to ensure the coverage of the extinguishing agent pipelines in the space. The extinguishing agent is introduced into the indoor system from the outdoor external pipelines, connecting with the internal pipelines and entering the pipeline network. Optionally, the nozzles are electrically driven, direction-controllable rotary nozzles. The pressure sensor is installed on the air inlet pipeline of the nozzle, with the pressure sensor no more than 1m away from the nozzle. The sensor accuracy is not less than 0.5%, and it can continuously collect and record the discharge pressure before, during, and after the test.

[0126] In some embodiments, the gaseous extinguishing agent storage system 32 includes multiple storage cylinders located in a cylinder room for storing extinguishing agent gas, with the storage cylinders stored in an external dedicated equipment room. Optionally, the extinguishing agent gas is not limited to heptafluoropropane extinguishing agent or inert gases such as carbon dioxide. When using an externally pressurized heptafluoropropane extinguishing agent cylinder group, the maximum filling density is 1250 kg / m³. 3 In addition, weight sensors are installed below the storage cylinder group to monitor the consumption and rate of extinguishing agent gas within the cylinders. Each storage cylinder is equipped with a pressure regulating valve and a safety relief device to ensure sufficient extinguishing agent volume and release pressure for large spaces. The storage cylinders are arranged in an array and interconnected via manifolds to form a redundant supply network, ensuring system operation even in the event of a single cylinder failure.

[0127] The control system 40 in this embodiment includes a server 41 and a control program stored in the server. When the control program is executed, it performs the following steps:

[0128] S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred and to identify the type of fire;

[0129] S2, if a fire occurs, generate a fire extinguishing strategy and output the fire extinguishing strategy to the gas fire extinguishing system, and control the release and distribution unit of the gas fire extinguishing system to release the gas fire extinguishing agent from the gas fire extinguishing agent storage unit to the fire source for fire extinguishing.

[0130] S3: Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishing conditions. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishing condition is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the control program is stopped from continuing to execute.

[0131] S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel is completely burned. If not, the fire is extinguished.

[0132] In some embodiments, step S3 further includes a movement step of focusing the mobile integrated sensor on the fire source.

[0133] In some embodiments, the fusion calculation in step S1 is configured to determine whether at least two of the following conditions are met, and if so, to determine that a fire has occurred:

[0134] (1) The optical density of the smoke output by the smoke concentration sensor is 0.3-2.0%obs / m;

[0135] (2) The image acquisition device identified a flame;

[0136] (3) Manual alarm;

[0137] (4) The highest temperature output by the temperature sensor is greater than 50℃;

[0138] (5) The highest temperature output by the temperature sensor is more than 20°C higher than the ambient temperature.

[0139] (6) The maximum heat flux output by the heat flow sensor is greater than 5kW / m 2 ;

[0140] (7) The rate of increase of the heat flux output by the heat flow sensor is greater than 2kW / m 2 / min.

[0141] In some implementations, the fusion calculation in step S3 is configured to determine whether the following conditions are met simultaneously, and if so, the fire is considered extinguished:

[0142] (1) The average temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing;

[0143] (2) The highest temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing;

[0144] (3) The image acquisition device identified no flames;

[0145] (4) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or increasing;

[0146] (5) The lowest oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or rising;

[0147] (6) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing;

[0148] (7) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing;

[0149] (8) The average heat flux output by the heat flow sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing;

[0150] (9) The maximum heat flux output by the heat flux sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing;

[0151] (10) If the fuel is solid fuel, the following criterion shall be added: the remaining mass of the combustor shall not decrease relative to the time 5, 10 and 20 seconds prior.

[0152] In some implementations, the fusion calculation in step S4 is configured to determine whether the following conditions are met simultaneously, and if so, it is determined that reignition will not occur:

[0153] (1) The image acquisition device identified no flames;

[0154] (2) The highest temperature output by the temperature sensor is below 60℃;

[0155] (3) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or increasing;

[0156] (4) The lowest concentration output by the oxygen concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, decreases by no more than 0.2%, and at least two of these time points are stable or rising;

[0157] (5) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or decreasing;

[0158] (6) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, does not increase by more than 2%, and at least two of these time points are stable or decreasing;

[0159] (7) If the fuel used in the test is solid fuel, the following criterion shall be added: the remaining mass of the combustible material shall not decrease relative to the time before 1 minute, 3 minutes and 5 minutes.

[0160] like Figure 1 As shown in Figure 5, in a preferred embodiment, the control system 40 further includes a control cabinet 42, which is communicatively connected to the fire detection system, the gas extinguishing system, and the server 41. Furthermore, the control cabinet is also communicatively connected to the ignition system, the ventilation and smoke extraction system, and the alarm system. The control cabinet can acquire sensor electrical signals transmitted by the fire detection system through internal interfaces (analog interface 4-20mA and / or RS485 digital interface), convert them into fire parameter data or values ​​recognizable by the server, and transmit the processed fire parameter data or values ​​to the control program in the server via wired (Ethernet, RS485) or wireless (LoRa, NB-IoT) communication modules for fire judgment calculation and feedback control. When the control program in the server issues instructions through calculation, the control cabinet receives the instructions and converts them into control signals (such as relay contact signals, PWM signals), such as controlling core equipment of the gas extinguishing system like solenoid valves, nozzle drive motors, and gas release valves, or controlling the start / stop and power of the ignition system's fire source, the start / stop and variable frequency speed control of the ventilation and smoke extraction system's fans, solenoid valves, and the alarm system's response.

[0161] In some embodiments, a large-space gas fire extinguishing system test platform also includes an alarm system 50, which includes an audible and visual alarm, a broadcast system, and an evacuation indicator. The alarm system is configured to receive a signal from the control system that indicates a fire has occurred and issue an alarm.

[0162] In some embodiments, a large-space gas fire extinguishing system test platform further includes a ventilation and smoke exhaust system 60. The ventilation and smoke exhaust system includes smoke exhaust outlets distributed on the upper part of the main building walls, smoke exhaust ducts connected to the smoke exhaust outlets, and the smoke exhaust ducts connected to one or more high-power smoke exhaust fans. Preferably, the smoke exhaust ducts and smoke exhaust fans are made of high-temperature resistant fireproof materials. Preferably, the smoke exhaust fans are installed in a dedicated machine room on the periphery of the building and their airflow can be adjusted via a frequency converter. Preferably, all smoke exhaust fans are connected to a control system.

[0163] See Figure 6 Some embodiments of this application also provide a testing method for a large-space gas fire extinguishing system, including the following steps:

[0164] Before step S1, the fire detection system is activated to collect fire parameter data through fixed integrated sensors and / or mobile integrated sensors. The fire parameter data includes extinguishing agent concentration, carbon monoxide concentration, oxygen concentration, temperature, smoke concentration, and heat flow. Images of the fire source are collected through an image acquisition device.

[0165] And / or, select the fuel and the burner ignition method and power;

[0166] S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred;

[0167] S2, if a fire occurs, a fire extinguishing strategy is generated and output to the gas extinguishing system. The release and distribution unit of the gas extinguishing system is controlled to adjust the spray pressure and spray angle of the nozzles, and the gas extinguishing agent in the gas extinguishing agent storage unit is released to the fire source for fire extinguishing. The fire extinguishing strategy includes global flooding fire extinguishing or local fire extinguishing.

[0168] S21. If the fire extinguishing strategy adopts global flooding fire extinguishing, then monitor the opening and closing times of all nozzles, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate.

[0169] S22, If the fire extinguishing strategy adopts local fire extinguishing, then monitor the opening and closing times of all nozzles, spray angle, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate.

[0170] S3. Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishment. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishment status is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the test method is stopped.

[0171] S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel is completely burned. If not, the fire is extinguished.

[0172] If step S3 determines that the fire has been extinguished for more than 10 minutes, then step S31, which determines the failure of fire extinguishing, is also included after step S3:

[0173] (1) If the spray pressure value is 0, it is determined that the extinguishing agent was not sprayed, resulting in the failure of extinguishing;

[0174] (2) If the spray pressure value is greater than 0 but less than the preset value, it is determined that the extinguishing agent spray pressure is insufficient, resulting in extinguishing failure.

[0175] (3) If the spray pressure value is greater than or equal to the preset value, but the extinguishing agent concentration does not reach the preset value, it is determined that the extinguishing agent concentration is not up to standard, resulting in extinguishing failure.

[0176] (4) If the spray pressure value is greater than or equal to the preset value and the extinguishing agent concentration exceeds the preset value, it is determined that the extinguishing agent has failed, resulting in extinguishing failure.

[0177] Some embodiments of this application also provide a method for testing the extinguishing of a timber stack fire, including the following steps:

[0178] (1) Calculate the amount of extinguishing agent gas required based on the type of woodpile fire measured, and fill the storage cylinder of the above-mentioned large space gas extinguishing system test platform with extinguishing agent gas.

[0179] (2) The extinguishing agent storage cylinder shall be placed at the minimum working temperature ±2℃ for more than 24 hours;

[0180] (3) Outside the test platform of the above-mentioned large space gas fire extinguishing system, n-heptane was injected into the oil pan, ignited and the wood stack was allowed to burn freely for 3 minutes. After the n-heptane was exhausted, the wood stack continued to burn for 3 minutes (the total pre-burning time outside the test space was 6 minutes).

[0181] (4) After the pre-combustion is completed, move the woodpile into the above-mentioned large-space gas extinguishing system test platform;

[0182] (5) Start the above-mentioned large space gas fire extinguishing system test platform for testing. The time from moving the woodpile to starting the above-mentioned large space gas fire extinguishing system test platform shall not exceed 15 seconds.

[0183] (6) The above-mentioned large-space gas fire extinguishing system test platform is used for fire extinguishing, and the fire detection system collects the fire extinguishing agent concentration, carbon monoxide concentration, oxygen concentration, temperature, smoke concentration, heat flow, etc. during the fire extinguishing process, as well as the opening and closing time of the nozzle of the gas fire extinguishing system, the spray delay time, spray angle, spray pressure, fire extinguishing agent consumption rate, time to reach the fire extinguishing concentration and fire extinguishing time, in order to judge the fire extinguishing effect.

[0184] Some embodiments of this application also provide a method for testing the extinguishing of liquid fuel, comprising the following steps:

[0185] (1) Calculate the amount of extinguishing agent gas required based on the type of liquid fuel fire measured, and fill the storage cylinder of the above-mentioned large space gas extinguishing system test platform with extinguishing agent gas.

[0186] (2) The extinguishing agent storage cylinder shall be placed at the minimum working temperature ±2℃ for more than 24 hours;

[0187] (3) Ignite liquid fuel within the space of the large-space gas fire extinguishing system test platform;

[0188] (4) Start the above-mentioned large space gas fire extinguishing system test platform for testing. The interval between the liquid ignition and the start of the above-mentioned large space gas fire extinguishing system test platform is about 30 seconds.

[0189] (5) The above-mentioned large-space gas fire extinguishing system test platform is used for fire extinguishing, and the fire detection system collects the fire extinguishing agent concentration, carbon monoxide concentration, oxygen concentration, temperature, smoke concentration, heat flow, etc. during the fire extinguishing process, as well as the opening and closing time of the nozzle of the gas fire extinguishing system, the spray delay time, spray angle, spray pressure, fire extinguishing agent consumption rate, time to reach the fire extinguishing concentration and fire extinguishing time, in order to judge the fire extinguishing effect.

[0190] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0191] The block diagrams of devices, apparatuses, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0192] It should also be noted that in the apparatus, device, and method of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of the present invention.

Claims

1. A test platform for a large-space gas fire extinguishing system, characterized in that, include: The platform body has a large internal space, and an ignition system is installed at the bottom of the large space. The ignition system includes fuel and a burner. A fire detection system, comprising a multi-parameter sensing system and an image acquisition device, wherein the multi-parameter sensing system includes fixed integrated sensors and mobile integrated sensors arranged in a grid pattern in a large space, for real-time measurement and acquisition of multiple parameters of the fire. A gaseous fire extinguishing system includes a gaseous fire extinguishing agent storage system and a gaseous fire extinguishing agent release and distribution system. The gaseous fire extinguishing agent release and distribution system is used to release the gaseous fire extinguishing agent from the gaseous fire extinguishing agent storage system to the fire source for fire extinguishing. The gaseous fire extinguishing agent release and distribution system includes pressure-measurable and angle-adjustable nozzles. The control system includes a server and a control program stored in the server. When the control program is executed, it performs the following steps: S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred; S2, if a fire occurs, generate a fire extinguishing strategy and output the fire extinguishing strategy to the gas fire extinguishing system, and control the release and distribution unit of the gas fire extinguishing system to release the gas fire extinguishing agent from the gas fire extinguishing agent storage unit to the fire source for fire extinguishing. S3: Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishing conditions. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishing condition is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the control program is stopped from continuing to execute. S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel has burned out. If not, the fire is extinguished.

2. The large-space gas fire extinguishing system test platform as described in claim 1, characterized in that, The volume of the large space is not less than 1000m³. 3 .

3. The large-space gas fire extinguishing system test platform as described in claim 1, characterized in that, The fixed integrated sensor and / or mobile integrated sensor both include integrated sensors, which include fire extinguishing agent concentration sensors, carbon monoxide concentration sensors, oxygen concentration sensors, smoke concentration sensors, temperature sensors, heat flow sensors, and wind speed sensors.

4. The large-space gas fire extinguishing system test platform as described in claim 3, characterized in that, The multi-parameter sensing system includes a grid-like slide rail, and the mobile integrated sensor also includes a sliding telescopic device. The sliding telescopic device is configured to include a pulley assembly and a telescopic assembly. Multiple integrated sensors with adjustable spacing are arranged on the telescopic assembly. The telescopic assembly is connected to the pulley assembly and moves by being suspended on the grid-like slide rail through the pulley assembly.

5. The large-space gas fire extinguishing system test platform as described in claim 4, characterized in that, Step S3 also includes moving the integrated mobile sensor to focus on the fire source.

6. The large-space gas fire extinguishing system test platform as described in any one of claims 3-5, characterized in that, The fusion calculation in step S1 is configured to determine whether at least two of the following conditions are met; if so, a fire state is determined to have occurred: (1) The optical density of the smoke output by the smoke concentration sensor is 0.3-2.0%obs / m; (2) The image acquisition device identified a flame; (3) Manual alarm; (4) The highest temperature output by the temperature sensor is greater than 50℃; (5) The highest temperature output by the temperature sensor is more than 20°C higher than the ambient temperature; (6) The maximum heat flux output by the heat flow sensor is greater than 5kW / m 2 ; (7) The rate of increase of the heat flux output by the heat flow sensor is greater than 2kW / m 2 / min.

7. The large-space gas fire extinguishing system test platform as described in any one of claims 3-5, characterized in that, The fusion calculation configuration in step S3 is to determine whether the following conditions are met simultaneously; if so, the fire is considered extinguished: (1) The average temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing; (2) The highest temperature output by the temperature sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not rise by more than 1°C, and at least two of these time points are stable or decreasing; (3) The image acquisition device identified no flames; (4) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or increasing; (5) The lowest oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.1% relative to 5 seconds, 10 seconds and 20 seconds ago, and at least two of these time points are stable or rising; (6) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing; (7) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing; (8) The average heat flux output by the heat flow sensor increases by no more than 0.01% relative to 5, 10 and 20 seconds ago, and at least two of these time points are stable or decreasing; (9) The maximum heat flux output by the heat flux sensor, relative to 5 seconds, 10 seconds and 20 seconds ago, does not increase by more than 0.01%, and at least two of these time points are stable or decreasing; (10) If the fuel is solid fuel, the following criterion shall be added: the remaining mass of the combustor shall not decrease relative to the time 5, 10 and 20 seconds prior.

8. The large-space gas fire extinguishing system test platform as described in any one of claims 3-5, characterized in that, The fusion calculation in step S4 is configured to determine whether the following conditions are met simultaneously; if so, it is determined that the fire will not reignite: (1) The image acquisition device identified no flames; (2) The highest temperature output by the temperature sensor is below 60℃; (3) The average oxygen concentration output by the oxygen concentration sensor decreases by no more than 0.2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or increasing; (4) The lowest concentration output by the oxygen concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, decreases by no more than 0.2%, and at least two of these time points are stable or rising; (5) The average carbon monoxide concentration output by the carbon monoxide concentration sensor increases by no more than 2% relative to 1 minute, 3 minutes and 5 minutes ago, and at least two of these time points are stable or decreasing; (6) The highest carbon monoxide concentration output by the carbon monoxide concentration sensor, relative to 1 minute, 3 minutes and 5 minutes ago, does not increase by more than 2%, and at least two of these time points are stable or decreasing; (7) If the fuel used in the test is solid fuel, the following criterion shall be added: the remaining mass of the combustible material shall not decrease relative to the time before 1 minute, 3 minutes and 5 minutes.

9. A test method for a large-space gas fire extinguishing system, characterized in that, Using the large-space gas fire suppression system test platform according to any one of claims 1-8, the following steps are included: Before step S1, the fire detection system is activated to collect fire parameter data through fixed integrated sensors and / or mobile integrated sensors. The fire parameter data includes extinguishing agent concentration, carbon monoxide concentration, oxygen concentration, temperature, smoke concentration, and heat flow. Images of the fire source are collected through an image acquisition device. And / or, select the fuel and the burner ignition method and power; S1, performs fusion calculations on the fire parameter data collected in real time by the fire detection system to determine whether a fire has occurred; S2, if a fire occurs, a fire extinguishing strategy is generated and output to the gas extinguishing system. The release and distribution unit of the gas extinguishing system is controlled to adjust the spray pressure and spray angle of the nozzles, and the gas extinguishing agent in the gas extinguishing agent storage unit is released to the fire source for fire extinguishing. The fire extinguishing strategy includes global flooding fire extinguishing or local fire extinguishing. S21. If the fire extinguishing strategy adopts global flooding fire extinguishing, then monitor the opening and closing times of all nozzles, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate. S22, If the fire extinguishing strategy adopts local fire extinguishing, then monitor the opening and closing times of all nozzles, spray angle, spray pressure, extinguishing agent concentration, and extinguishing agent consumption rate. S3. Perform fusion calculation on the fire parameter data collected in real time by the fire detection system to determine whether the fire is under extinguishment. If yes, control the gas extinguishing agent release and distribution system to perform a stop action. If no, continue to perform fusion calculation on the fire parameter data collected in real time by the fire detection system. If the fire extinguishment status is no for more than 10 minutes, it is determined that the fire extinguishing has failed and the test method is stopped. S4. Continue to fuse and calculate the fire parameter data collected in real time by the fire detection system to determine whether the fire source has reignited. If so, continue to fuse and calculate the fire parameter data collected in real time by the fire detection system until the fuel has burned out. If not, the fire is extinguished.

10. The test method for a large-space gas fire extinguishing system as described in claim 9, characterized in that, If step S3 determines that the fire has been extinguished for more than 10 minutes, then step S31, which determines the failure of fire extinguishing, is also included after step S3: (1) If the spray pressure value is 0, it is determined that the extinguishing agent was not sprayed, resulting in the failure of extinguishing; (2) If the spray pressure value is greater than 0 but less than the preset value, it is determined that the extinguishing agent spray pressure is insufficient, resulting in extinguishing failure. (3) If the spray pressure value is greater than or equal to the preset value, but the extinguishing agent concentration does not reach the preset value, it is determined that the extinguishing agent concentration is not up to standard, resulting in extinguishing failure. (4) If the spray pressure value is greater than or equal to the preset value and the extinguishing agent concentration exceeds the preset value, it is determined that the extinguishing agent has failed, resulting in extinguishing failure.

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