Closed foam water spraying system

Abstract

The invention relates to the technical field of fire-fighting spraying systems, and discloses a closed foam water spraying system which comprises a response module, an integrated fire detection sensor, a system main pipe for receiving a fire detection signal and starting a fire extinguishing program, a foam liquid tank, an alarm assembly and a connecting assembly, each spraying control module comprises a spraying unit and a control unit; the allocation management module is provided with a spraying system resource allocation mechanism, and the most suitable spraying resource is selected to be called according to the allocation mechanism; and the monitoring and feedback module is connected with the response module, the spraying control module and the allocation management module and provides support for decision making of all the modules. According to the system provided by the invention, an optimized structural design and an intelligent monitoring device are adopted, when the foam liquid storage of the current system is insufficient, the foam liquid resource at the most appropriate position can be automatically called, the timeliness and thoroughness of fire extinguishing are ensured, and the reliability and safety of system application are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire sprinkler systems, and particularly to a closed foam-water sprinkler system. Background Art

[0002] The foam-water sprinkler system is a fixed fire extinguishing device specifically designed to extinguish specific types of fires such as fires of flammable liquids like oils and chemicals. It combines the advantages of water and foam liquid and can quickly generate a large amount of foam mixture when a fire occurs, covering the fire source and suppressing the spread of the flame. This system is widely used in places such as petrochemical industry, warehousing and logistics, airport terminals, data centers, etc., and is highly favored for its efficient, fast and environmentally friendly characteristics.

[0003] The foam-water sprinkler system generally includes a fire monitoring module to detect and handle fires in a timely manner. For example, a fire monitoring and automatic fire extinguishing system and its working method with the publication number CN111739252B includes a fire source monitoring system, a monitoring center and an automatic fire extinguishing system. Through the far-infrared high-definition automatic zoom thermal imager and visible light high-definition fog-penetrating camera of the fire source monitoring system, the thermal imaging and visible light images of the mountain forest can be collected in real time. Then, the thermal imaging and visible light images are respectively gridified, and then each thermal imaging grid and image grid are judged by an algorithm to determine whether there is a fire source point. When an early fire source occurs, it can be detected in time and the fire source point can be accurately located for early warning to prevent it from developing into a larger fire. For example, the UHV converter transformer mobile fire warning and extinguishing device with the publication number CN113963505B belongs to the technical field of electric power fire-fighting equipment, including a fire source detection and positioning system arranged near the UHV converter transformer, and a mobile fire extinguishing device signal-connected to the fire source detection and positioning system. The fire source detection and positioning system uses a multi-sensor fusion algorithm to identify and locate the converter transformer fire source and smoke, sends the fire source information to the monitoring terminal for early warning, and sends the fire source positioning information to the mobile fire extinguishing device for fire extinguishing;

[0004] These existing technologies focus on improving the recognition accuracy of fires and preventing the spread of fire when dealing with fires. However, when these sprinkler fire extinguishing systems face complex and changeable fire environments, their flexibility and efficiency are significantly insufficient. Especially in dangerous places such as petrochemical industry where the fire spreads extremely fast and requires a large amount of fire extinguishing resources. Specifically:

[0005] During the fire extinguishing process, the reserve amount of foam liquid often becomes a key factor restricting the system performance. Once the foam liquid is insufficient, the existing remedial measures are often difficult to quickly and effectively solve the problem. First of all, waiting for the intervention of professional fire-fighting teams is a feasible solution, but this method will significantly extend the fire extinguishing time and increase the risk of further spread of the fire, which is obviously not ideal for the rapid response requirements in emergency situations;

[0006] Secondly, although equipping a spare foam liquid tank on-site can alleviate the problem of insufficient foam liquid to a certain extent, the practical application of this solution is restricted by site space limitations and high investment costs, which limits the popularity of spare foam liquid tanks and prevents them from being widely used in all buildings.

[0007] Furthermore, when there is no spare foam liquid on-site or the spare quantity cannot meet the fire extinguishing requirements, contacting the foam liquid supplier for emergency delivery becomes an option. However, the timeliness and efficiency of this method are difficult to guarantee, especially when the fire has reached an emergency stage and the time window is extremely limited. In addition, the compatibility issue between the newly added foam liquid and the original foam liquid in terms of specifications and parameters is also a risk point that cannot be ignored. Any mismatch may lead to a significant decrease in the fire extinguishing effect and even cause the serious consequence of system failure.

[0008] In summary, the existing closed foam-water sprinkler system has many defects in terms of structural design and resource allocation. These problems limit the fire extinguishing efficiency and reliability of the system and also pose an obstacle to the improvement of fire response capabilities. Therefore, a more intelligent, adaptive, and efficient closed foam-water sprinkler system is needed to overcome these defects and enhance fire response capabilities. Summary of the Invention

[0009] The purpose of the present invention is to solve the deficiencies existing in the prior art and to propose a closed foam-water sprinkler system.

[0010] To achieve the above purpose, the present invention adopts the following technical solutions:

[0011] A closed foam-water sprinkler system includes a response module, an integrated fire detection sensor that captures early signs of a fire, receives a fire detection signal, and initiates a fire extinguishing program. It is internally provided with a system main pipe for introducing pressurized water, a foam liquid tank, an alarm component, and a connection component; several spray control modules are connected to the response module and include a spray unit and a control unit. The spray unit consists of a pipe network and several nozzles, and each nozzle is provided with an automatic control valve. The control unit is used to dynamically adjust the on / off state of each nozzle; a deployment management module is provided with a resource deployment mechanism for the sprinkler system and selects the most suitable sprinkler resources for invocation according to the deployment mechanism; a monitoring and feedback module is connected to the response module, the spray control module, and the deployment management module, and monitors the working status of each module in real time to provide support for the decision-making of each module.

[0012] As a preferred technical solution of the present invention, one end of the system main pipe is connected to a number of spray control modules, and a zone valve and a water flow indicator are jointly provided between the system main pipe and each spray control module. A system independent main valve is provided on the system main pipe, and a water supply pipe is provided at the other end of the system main pipe. A signal gate valve is provided at one end of the water supply pipe close to the system main pipe; a drain valve is provided on the drain pipe at the bottom of the foam liquid tank, a foam liquid flow valve is provided at the liquid circulation end of the foam liquid tank, and a liquid level gauge is also connected to the liquid circulation end. A liquid level gauge drain valve and a liquid level gauge inlet and drain valve are also provided between the liquid level gauge and the liquid circulation end; the alarm assembly includes a wet alarm valve provided between the signal gate valve and the system main pipe. An alarm control valve, a delay chamber and a pressure switch are sequentially provided on the wet alarm valve. An alarm pipe is provided on the system main pipe, a hydraulic alarm bell is provided on the alarm pipe, and the alarm pipe is connected to the pressure switch; the connection assembly is used to connect the foam liquid tank and the system main pipe. The connection assembly includes a proportioning mixer provided on the system main pipe. A filling valve is provided at the filling end of the foam liquid tank. A foam liquid discharge pipe is jointly provided between the proportioning mixer and the filling end of the foam liquid tank. A check valve II, a foam liquid control valve and a foam liquid cut-off valve are provided on the foam liquid discharge pipe. A foam liquid drain valve is also provided at the discharge end of the foam liquid control valve. A foam liquid water inlet is also provided on the foam liquid tank. A foam liquid tank water inlet pipe is connected between the foam liquid water inlet and the system main pipe. A water supply control valve is provided on the foam liquid tank water inlet pipe; the connection assembly further includes a control member for controlling the state of the foam liquid control valve.

[0013] As a preferred technical solution of the present invention, the control member includes a control pipe provided between the water supply pipe and the foam liquid control valve. A stopcock valve with a pressure gauge is provided at the connection position between the control pipe and the foam liquid control valve. A control pipe inlet valve and a check valve I are provided at a position on the control pipe close to the water supply pipe. A pressure relief valve and a manual pressure relief valve are also provided on the control pipe, and a pressure relief valve water supply valve is provided between the two.

[0014] As a preferred technical solution of the present invention, filters are provided on both the foam liquid tank water inlet pipe and the control pipe.

[0015] As a preferred technical solution of the present invention, the system main pipe is connected to a number of spray units, and an auxiliary pump is provided at each connection. The auxiliary pump is connected to the control unit.

[0016] As a preferred technical solution of the present invention, a number of supply pipes are connected and communicated at the connection between the system main pipe and a number of spray units. The supply pipes are respectively connected and communicated with the connections between other system main pipes and spray units. A call control valve is provided on each supply pipe, and the call control valve is connected to the deployment management module.

[0017] As a preferred technical solution of the present invention, the dispensing management module is connected to the liquid level gauge in the response module. An alarm threshold is set in the liquid level gauge. When the liquid level in the foam liquid tank is lower than the alarm threshold, the dispensing management module operates to search for and provide a callable sprinkler system in a timely manner.

[0018] As a preferred technical solution of the present invention, different measurement factors are set in the dispensing mechanism. The calculation of the callable evaluation value is comprehensively affected by different measurement factors and is obtained by synthesizing the evaluation values corresponding to all the measurement factors;

[0019] The measurement factors include the type of building where the closed foam-water sprinkler system is located.

[0020] As a preferred technical solution of the present invention, a search range model is also set in the dispensing mechanism. The search range model can restrict the search range of the callable sprinkler system resources.

[0021] As a preferred technical solution of the present invention, the monitoring and feedback module includes: real-time data acquisition: connected to multi-source sensors to form a dense sensor network to monitor the working status of the devices in each module in real time; data analysis and processing: including a central server that receives and processes data from different sensors, processes the data, and provides the required data for each module; intelligent decision support: based on comprehensive data analysis, provides support for the decision-making of each module; feedback mechanism: regularly monitors the working status of each module and dynamically adjusts according to the feedback data; user interface and visualization display: provides an intuitive user interface to display the operation information of each module. Staff can view historical data, generate reports, and perform necessary manual operations through the interface.

[0022] The present invention has the following beneficial effects:

[0023] 1. The system structure can quickly respond to fires: The designed closed foam-water sprinkler system of the present application adopts an optimized structural design and intelligent monitoring devices. When a fire occurs, the system can quickly detect the fire source and start the sprinkler device to release a large amount of foam for fire extinguishing. This rapid response mechanism can greatly shorten the fire extinguishing time, effectively suppress the spread of the fire, and reduce the losses caused by the fire;

[0024] 2. It can call resources in other systems to ensure the timeliness and thoroughness of fire extinguishing: The system proposed in the present application has an intelligent resource allocation function. When a fire occurs, if the foam liquid reserve in the current system is insufficient, the system can automatically call the foam liquid resources in other adjacent or standby systems to ensure the timeliness and thoroughness of fire extinguishing. This cross-system resource allocation ability greatly improves the fire extinguishing efficiency, enables the fire to be controlled in a shorter time, and improves the reliability and safety of the system;

[0025] 3. Improve fire extinguishing accuracy and efficiency: The system designed in this application adopts precise fire extinguishing technology and efficient spraying devices. The system can adjust the spraying amount and spraying range of the foam liquid according to the actual situation of the fire, ensuring fire extinguishing accuracy and efficiency. This precise fire extinguishing technology can reduce the waste of foam liquid, improve the fire extinguishing effect, and at the same time reduce the impact on the environment;

[0026] 4. Reduce maintenance costs and downtime: The system adopts intelligent monitoring and management functions, which can monitor the operating status of the system and the reserve volume of the foam liquid in real time. When the system fails or the foam liquid reserve is insufficient, the system can automatically issue a warning to remind the operator to deal with it in time. This intelligent monitoring and management function can reduce maintenance costs and downtime and ensure the stable operation of the system. Brief Description of the Drawings

[0027] Figure 1 It is a system diagram of a closed foam-water spraying system proposed by the present invention;

[0028] Figure 2 It is a system diagram of the spraying control module;

[0029] Figure 3 It is a structural schematic diagram of the closed foam-water spraying system;

[0030] Figure 4 It is a system diagram of the response module and the spraying unit;

[0031] Figure 5 It is a system diagram of the measurement factor and the callable evaluation value;

[0032] Figure 6 It is a flow chart of the dispensing management module.

[0033] In the figure: 1 Foam liquid inlet, 2 Liquid level gauge discharge valve, 3 Foam liquid circulation valve, 4 Liquid level gauge inlet and discharge valve, 5 Liquid level gauge, 6 Automatic exhaust control valve, 7 Drain valve, 8 Liquid injection valve, 9 Signal gate valve, 10 Hydraulic alarm bell, 11 Alarm pipeline, 12 Pressure relief valve water supply valve, 13 Water supply control valve, 14 Foam liquid tank inlet pipeline, 15 Alarm control valve, 16 Wet alarm valve, 17 Check valve I, 18 Filter, 19 Control pipeline inlet valve, 20 Foam liquid cut-off valve, 21 Check valve II, 22 Foam liquid discharge pipeline, 23 System independent main valve, 24 Foam liquid test valve, 25 Cock, 26 Control pipeline, 27 Foam liquid drain valve, 28 Pressure switch, 29 Automatic exhaust valve, 30 Water flow indicator, 31 Auxiliary pump, 32 Area valve, 33 Manual pressure relief valve, 34 Water supply pipe, 35 System main pipe, 36 Proportioning mixer, 37 Foam liquid control valve, 38 Pressure relief valve. Detailed Embodiment

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Referring to Figure 1-6 , a closed foam-water sprinkler system includes:

[0036] A response module integrates a fire detection sensor to capture early signs of a fire, receive a fire detection signal, and initiate a fire extinguishing program;

[0037] It includes a system main pipe 35, a foam liquid tank, an alarm assembly, and a connection assembly;

[0038] Specifically, the system main pipe 35 is used to introduce pressurized water. One end of the system main pipe 35 is connected to a number of sprinkler control modules. An area valve 32 and a water flow indicator 30 are jointly provided between the system main pipe 35 and each sprinkler control module. A system independent main valve 23 is provided on the system main pipe 35 to control the state of the pressurized water flowing to the sprinkler control module. The other end of the system main pipe 35 is provided with a water supply pipe 34, and the water supply pipe 34 is connected to water flow supply devices such as a fire pool, a water tank, and a fire pump adapter. A signal gate valve 9 is provided at one end of the water supply pipe 34 close to the system main pipe 35 to control the circulation of the pressurized water;

[0039] A drain valve 7 is provided on the drain pipe at the bottom of the foam liquid tank. Opening the drain valve 7 can discharge the pressurized water in the foam liquid tank. A foam liquid circulation valve 3 is provided at the liquid circulation end of the foam liquid tank. This end is used to supplement the foam liquid or discharge the expired foam liquid, and a liquid level gauge 5 is also connected in communication at this end. A liquid level gauge drain valve 2 and a liquid level gauge inlet and outlet valve 4 are also provided between the liquid level gauge 5 and this liquid circulation end. A water level alarm is provided in the liquid level gauge 5, which can send a notice to the staff in time when the foam liquid in the foam liquid tank is low;

[0040] The alarm assembly includes a wet alarm valve 16 provided between the signal gate valve 9 and the system main pipe 35. An alarm control valve 15, a delay chamber, and a pressure switch 28 are sequentially provided on the wet alarm valve 16. An alarm pipe 11 is provided on the system main pipe 35, and a hydraulic alarm bell 10 is provided on the alarm pipe 11. The alarm pipe 11 is connected to the pressure switch 28;

[0041] The connection component is used to connect the foam liquid tank and the main system pipe 35. The connection component includes a proportioning mixer 36 arranged on the main system pipe 35. A liquid injection valve 8 is arranged at the liquid injection end of the foam liquid tank. A foam liquid discharge pipe 22 is jointly provided between the proportioning mixer 36 and the liquid injection end of the foam liquid tank. A check valve II 21, a foam liquid control valve 37, and a foam liquid cut-off valve 20 are sequentially arranged on the foam liquid discharge pipe 22 in the direction from the proportioning mixer 36 to the foam liquid tank. A foam liquid drain valve 27 is arranged at the discharge end of the foam liquid control valve 37. A foam liquid inlet 1 is also arranged on the foam liquid tank. A foam liquid tank water inlet pipe 14 is connected and communicated between the foam liquid inlet 1 and the main system pipe 35. A water supply control valve 13 is arranged on the foam liquid tank water inlet pipe 14. Among them, the foam liquid control valve 37 is composed of a valve body, a valve core, a control chamber, a liquid inlet, a liquid outlet, and an exhaust end. The valve body houses internal components and connects pipes. The valve core is a key component for controlling the opening and closing of the valve, usually composed of a piston or a spherical structure. The control chamber is used to receive and transmit external control signals, such as pressure changes. The liquid inlet and the liquid outlet are respectively connected to the foam liquid tank and the proportioning mixer 36 through the foam liquid discharge pipe 22. The exhaust end is used to discharge air or liquid in the valve to ensure the smooth flow of the foam liquid. When the pressure water is drained off, the pressure in the control chamber drops rapidly, losing the pressure support for the valve core. The valve core automatically opens under the action of a spring or other reset mechanism, thereby realizing the flow of the foam liquid.

[0042] The connection component further includes a control member, which is used to control the state of the foam liquid control valve 37. The control member includes a control pipe 26 arranged between the water supply pipe 34 and the foam liquid control valve 37. A cock valve 25 with a pressure gauge is arranged at the connection position between the control pipe 26 and the foam liquid control valve 37. This pressure gauge is used to observe whether the water with appropriate pressure is flushed into the pipeline. A control pipe water inlet valve 19 and a check valve I 17 are arranged on the control pipe 26 near the water supply pipe 34. A pressure relief valve 38 and a manual pressure relief valve 33 are also arranged on the control pipe 26. When the pressure relief valve 38 cannot drain immediately, the system can be started immediately through the manual pressure relief valve 33. The pressure relief valve 38 is connected to a pressure switch 28, and a pressure relief valve water supply valve 12 is also arranged between the two;

[0043] An automatic exhaust control valve 6 and an automatic exhaust valve 29 are arranged on both the foam liquid discharge pipe 22 and the exhaust end of the foam liquid tank;

[0044] A foam liquid test valve 24 is also arranged between the proportioning mixer 36 and the system independent main valve 23;

[0045] Filters 18 are arranged on both the foam liquid tank water inlet pipe 14 and the control pipe 26, which are used to filter impurities in the pressure water and extend the service life of the pipeline.

[0046] In the initial state, the system main pipe 35 is filled with pressurized water at a pressure of 0.14 MPa - 1.2 MPa. The pressurized water will enter the foam liquid tank through the foam liquid tank water inlet pipe 14 and the water supply control valve 13. The pressurized water is located between the inner side of the tank and the capsule for storing foam liquid. Under the extrusion of this pressurized water, the foam liquid in the tank will enter the inlet end of the foam liquid control valve 37 through the foam liquid cut-off valve 20. At the same time, the pressurized water in the system main pipe 35 will enter the control cavity of the foam liquid control valve 37 through the control pipe water inlet valve 19, the filter 18, the check valve 17 and the control pipe 26, keeping the foam liquid control valve 37 in the closed state. At this time, the system is in the standby state;

[0047] When a fire occurs, the glass ball on the sprinkler head breaks and the pipe sprays water. At this time, the water flow indicator 30 acts, the wet alarm valve 16 opens, and the pressurized water enters the alarm pipe 11 through the alarm control valve 15 and the delay chamber, causing the hydraulic alarm bell 10 to start alarming. At the same time, the pressure switch 28 acts, causing the fire pump to operate, pumping the water in the fire pool into the water supply pipe 34. At the same time, the pressurized water passes through the pressure relief valve water supply valve 12 to open the pressure relief valve 38, discharging the pressurized water in the control pipe 26, causing the foam liquid control valve 37 to open automatically. The foam liquid in the foam liquid tank enters the proportioning mixer 36 through the foam liquid control valve 37, the foam liquid discharge pipe 22 and the check valve 21, mixes with the water entering the proportioning mixer 36 from the system main pipe 35 to form a foam mixture, and is transported to the pipe network and sprayed through the sprinkler heads.

[0048] This closed - type foam - water sprinkler system further includes several sprinkler control modules. The sprinkler control module includes a sprinkler unit and a control unit, which control the on - off state of the sprinklers, give priority to starting the sprinklers in the fire source area and the areas near the fire source, monitor the fire situation in real time, and dynamically adjust the sprinkler configuration according to the feedback.

[0049] Among them, the sprinkler unit includes a pipe network and several sprinkler heads. The pipe network is composed of pipes, connecting each sprinkler head and ensuring that water flow can reach each sprinkler head smoothly. The design of the pipe network needs to consider the pressure resistance and corrosion resistance of the system to ensure long - term stable operation. The sprinkler heads are distributed on the building roof or other key positions. An automatic control valve is set on each sprinkler head. When installing the sprinkler heads, factors such as coverage area, spraying angle and flow rate are considered to ensure that the fire source and its surrounding areas can be effectively covered in case of a fire. The types of sprinkler heads include but are not limited to standard type, concealed type, quick - response type, etc. The specific selection is based on the use function and fire protection requirements of the building;

[0050] Among them, the control unit is connected to the monitoring and feedback module. This unit includes:

[0051] Data collection and risk assessment: At the moment of fire ignition, the system immediately activates a rapid data collection program to obtain real-time information from various sensors inside the building. Combining the collected data, it controls the opening of the sprinklers.

[0052] Calculating the spraying area: The spraying area is divided into a main area and a secondary area. The main area is the place where the fire occurs, covering the fire source and the high-risk areas nearby. The spraying in the main area is mainly used for extinguishing the fire. The secondary area is the periphery of the main area, and the spraying in the secondary area is used to prevent the spread of the fire. Among them, the system introduces an adaptive algorithm to continuously optimize the spraying strategy according to real-time data. For example, if the fire spreads rapidly in a certain direction, the spraying range in that direction is automatically expanded; conversely, it is reduced.

[0053] Sprinkler configuration management: Dynamically adjust the on / off state of the sprinklers according to the real-time monitored fire situation changes. Prioritize starting the sprinklers in the fire source area and the areas close to the fire source. Real-time monitor the fire situation changes and dynamically adjust the sprinkler configuration according to the feedback to ensure the best fire extinguishing effect.

[0054] Furthermore, the main system pipe 35 is connected to a number of sprinkler units, and an auxiliary pump 31 is provided at each connection. The auxiliary pump 31 is connected to the control unit, and its operating state is controlled by the control unit. When a fire occurs, the control unit can activate the auxiliary pump 31 connected to the sprinkler unit located at the center of the fire, thereby increasing the water pressure and flow rate at that place, ensuring that a large amount of fire extinguishing agent can cover the fire source and its surrounding areas in the shortest time, and thus more effectively suppressing the spread of the flame. Secondly, since the auxiliary pump 31 can be activated at the initial stage of the fire, this makes the fire extinguishing process more rapid and reduces the damage caused by the fire to the building structure and internal facilities.

[0055] Furthermore, a number of supply pipes are connected and communicated at the joints between the main system pipe 35 and a number of sprinkler units. These supply pipes are respectively connected and communicated with the joints between other main system pipes 35 and sprinkler units to realize the mutual connection between different closed foam-water sprinkler systems. A call control valve is provided on the supply pipe, which enables the resources in other systems to be called for fire extinguishing assistance when the sprinkler resources in one system are scarce.

[0056] The closed - type foam - water sprinkler system further includes a deployment management module, which is connected to the call control valve. This module sets up a system resource deployment mechanism and a data processing unit. The data processing unit includes a cloud platform, which is used to receive and process data from sensors, collect data of the building where the system is located, and regularly calculate the call - available evaluation value of the system resources in the building according to the deployment mechanism. The higher the evaluation value, the more suitable the resources in the system are for being called. A database is established to store the call - available evaluation value and is updated in real - time. When a fire occurs and the system resources are insufficient, the sprinkler system resources in the building corresponding to the highest score are searched from the database for calling. Further, the deployment management module is connected to the liquid level gauge 5 in the response module. An alarm threshold is set in the liquid level gauge 5. When the resources in the foam liquid tank are lower than this alarm threshold, the deployment management module operates to search for a call - available system in a timely manner.

[0057] Specifically, different measurement factors are set in the deployment mechanism. The calculation of the call - available evaluation value is comprehensively affected by different measurement factors and is obtained by synthesizing the evaluation values corresponding to all measurement factors. The synthesis can be calculated by the weighted - sum calculation method.

[0058] Further, the measurement factors include the building type where the sprinkler system is located, which can be divided into residential buildings, office buildings, warehouses, etc. The evaluation - value calculation function of this measurement factor is:

[0059]

[0060] where t is the current time, ranging from 0 - 24, B is the baseline offset, which is a constant to ensure that the evaluation value does not become negative and can adjust the overall score range, A is the amplitude coefficient, which controls the amplitude of score fluctuations, W(d) is the working - day and rest - day factor, which is a function that adjusts the score according to the date to reflect the different impacts of working days and rest days, T is the cycle length, which is used to adjust the speed of score changes, C is the phase offset, which is the central time point used to determine the time point with the highest score, and G(t) is an additional adjustment function to make this calculation model targeted.

[0061] Embodiment 1

[0062] When the building type is a residential building:

[0063] The building - type evaluation - value calculation function is:

[0064]

[0065] Among them, B is the baseline offset, A is the amplitude coefficient that controls the amplitude of the score fluctuation, W(d) is the working day and rest day factor, T is the cycle length used to adjust the speed of score change, C is the phase offset used to determine the time point with the highest score, p is the maximum value of the night penalty, μ is the center position of the Gaussian function, which is the time point where the lowest score is expected, and σ is the standard deviation that determines the width of the curve.

[0066] Among them, the value of W(d) is set using a Boolean expression:

[0067]

[0068] For example: B = 0.5 to ensure that the evaluation value range is between 0 and 1, A = 0.5 so that the sine wave fluctuates within the range of 0 to 1 in a day, T = 24 representing the cycle of a day to ensure smooth score change within a day, C = 10 so that the score is the highest around 10 am, p = 0.3 as the maximum value of the night penalty, μ = 3 indicating that the lowest score occurs in the 3 am time period, σ = 2, w rest = 0.8 is used to reduce the evaluation score on rest days, then:

[0069]

[0070] At this time, use this formula to calculate the value at 9:00 am (t = 9) on Wednesday (d = 3):

[0071] S(9) ≈ 0.418;

[0072] Calculate the value at 3:00 am on Saturday (d = 6):

[0073] S(9) ≈ -0.055.

[0074] Using this formula can calculate the callable evaluation value of the residential building more precisely, and particularly emphasizes the importance of the deep sleep state of residents during late night and early morning hours when the score is the lowest and it is least suitable to call the resources in the sprinkler system of the building. This method not only improves the efficiency and safety of resource allocation but also enhances the reliability and adaptability of the system.

[0075] Example Two

[0076] When the building type is an office building, since the personnel status in the office building is opposite to that in the residential building, referring to Example One, the evaluation formula is:

[0077]

[0078] Among them, B is the baseline offset, A is the amplitude coefficient, W(d) is the working day and rest day factor, T is the cycle length, C is the phase offset used to determine the time point with the highest score, p is the maximum value of the night bonus, μ is the center position of the Gaussian function, which is the time point where the highest score is expected, and σ is the standard deviation, which determines the width of the curve.

[0079] For example: B = 0.5, A = 0.5, T = 24, C = 16, making the score the lowest around 4 pm, p = 0.5, μ = 3, indicating that the time period around 3 am has the highest score, σ = 2, w rest = 0.8, used to reduce the evaluation score on rest days, then the scoring formula at this time is:

[0080]

[0081] At this time, use this formula to calculate the value at 16:00 (t = 16) on Wednesday (d = 3) afternoon:

[0082] S(16) ≈ 0.5;

[0083] Calculate the value at 3:00 am (t = 3) on Saturday (rest day) (d = 6):

[0084] S(3) ≈ 0.745.

[0085] Using this formula can particularly emphasize that the scores are the lowest in the late night and early morning periods, when there are the fewest staff in the office building, and it is more suitable to allocate the resources in the sprinkler system of this building. This design can reduce the safety hazards of other buildings while ensuring the timeliness of fire extinguishing.

[0086] Embodiment 3

[0087] The measurement factor also includes the personnel density of the building where the sprinkler system is located. Through personnel counting sensors installed at key positions of the building such as entrances, exits, corridors, etc., such as infrared sensors, cameras, Wi-Fi / Bluetooth devices, etc., the number of people entering and leaving is monitored and calculated in real time, and the personnel density is calculated and scored through the data processing unit;

[0088] According to the data collected above, calculate the real-time personnel density value D of each area where the sprinkler system is located, D = N / A;

[0089] Among them: N is the number value of the people in this area, and A is the area value of this area;

[0090] According to the collected personnel density value D, set the scoring function H(D) corresponding to this measurement factor:

[0091]

[0092] where k is the proportionality coefficient, generally set to 1.0, representing the maximum score in the absence of people (i.e., D = 0), and α 1 is the attenuation rate in the low-density area, and α 2 is the attenuation rate in the high-density area, and D th is the personnel density threshold, used to distinguish between low-density and high-density areas, making the score change more flexible.

[0093] For example, set k = 1, α 1 = 3, α 2 = 10, and D th = 0.05;

[0094] When the personnel density value is 0.06, then H(0.06) ≈ 0.904;

[0095] When the personnel density value is 0.002, then H(0.002) ≈ 0.994;

[0096] Using this model, by introducing a threshold, the piecewise model can better simulate the impact brought by the change of personnel density, emphasizing the strong influence of personnel density on the score, making the score decrease significantly as the personnel density increases, and the score drops rapidly at high personnel densities, being able to capture these changes more precisely and provide more accurate score results.

[0097] Furthermore, the system resource allocation mechanism also includes a priority order allocation unit. Specifically, prioritize each measurement factor. For example, the priority order is: personnel density, building type, fire-fighting equipment, etc., and set a threshold for each measurement factor. When a fire occurs, search for buildings within a certain range from the fire source where the personnel density score value is higher than the preset threshold, and call the resources in the sprinkler system in that building. When there are several, select the system resources in the building where the building type evaluation score is higher than the preset threshold, and layer by layer select the most suitable sprinkler system according to this step.

[0098] Furthermore, when calling resources, the search range for available resources is affected by the size of the fire. The specific search range model is:

[0099]

[0100] where R(F) is the search range, F is the fire assessment value, representing the size of the fire, and R max is the maximum search range, indicating the maximum searchable range in the case of no fire or a small fire. η is the adjustment coefficient, used to control the influence degree of the fire on the search range. A larger η value will make the search range decrease more sharply as the fire increases. When F = 0, that is, when the fire is very small, the search range approaches R max, that is, search for the most suitable resources as widely as possible. As F increases, the search scope narrows, thereby improving the search speed and concentrating efforts on extinguishing the fire source.

[0101] Among them, the acquisition channels of the fire intensity evaluation value F include but are not limited to:

[0102] Sensor monitoring: Through the distribution of multiple temperature sensors, the location of the fire source can be accurately determined, and the trend of fire spread can be evaluated based on the temperature gradient. Smoke detectors can detect the concentration of smoke particles in the air to help judge the presence and severity of the fire. Infrared thermal imagers can capture the infrared radiation emitted by the flame, visually display the temperature distribution of the fire scene, and help evaluate the size and spread direction of the fire.

[0103] Video monitoring and image recognition: Using flame detection algorithms, combined with computer vision technology through cameras installed in buildings, the presence of flames and smoke can be automatically identified, and the scope of the fire can be estimated. The fire recognition system trained with deep learning models can extract features from the video stream to accurately judge the occurrence and scale of the fire.

[0104] Fire simulation and prediction: Using professional fire simulation software such as FDS, according to factors such as building structure, material properties, and ventilation conditions, simulate the fire development process, predict the fire spread speed and influence range, and continuously update the simulation results in combination with real-time data to provide a scientific basis for decision-making.

[0105] Under this formula, when the fire is large, the search scope is small, which means that the system will give priority to calling the resources closest to the fire origin. This helps to quickly provide sprinkler resources, concentrate efforts on extinguishing the current fire source, and prevent the fire from spreading further. When the fire is small, the search scope is large, and the system can search more widely for the most suitable sprinkler system resources, which can ensure the safety of other buildings and avoid unnecessary activation causing panic or danger to people. For example, when the fire is small, under the search of this search model, the most suitable building to call resources is an unoccupied office building, and within a certain search range smaller than R(F), the most suitable building to call sprinkler resources is an occupied residential building. Under the action of this search model, the system will select the resources in the sprinkler system of the unoccupied office building for calling, which can improve the safety and reliability of other buildings while preventing the fire from spreading.

[0106] The closed foam-water sprinkler system also includes a monitoring and feedback module, which is connected to the response module, the sprinkler control module, and the deployment management module to ensure the efficient operation and real-time response of the entire system, including:

[0107] Real-time data collection, connected to multi-source sensors such as temperature sensors, smoke detectors, infrared thermal imagers, etc., to form a dense sensor network covering the entire protected area, and real-time monitoring of environmental parameters such as temperature, smoke concentration, flame position, etc. Secondly, it is connected to a video surveillance device, combined with computer vision technology, to automatically identify the presence of flames and smoke, and estimate the scope of the fire, which provides important support for the early detection and rapid response of fires;

[0108] Data analysis and processing, including a central server, connected to the cloud platforms in the response module, sprinkler control module, and deployment and management module, receiving and processing data from different sensors, performing tasks such as calculating personnel density and fire assessment, and analyzing video surveillance images using machine learning algorithms or deep learning models to provide more accurate fire information;

[0109] Intelligent decision support: Based on comprehensive data analysis, the central control system can automatically evaluate the size of the fire and initiate corresponding emergency response measures according to preset strategies. For example, determine which sprinklers need to be activated first and the division of the spraying area;

[0110] Feedback mechanism, during the entire fire extinguishing process, continuously monitor the change of the fire situation, and dynamically adjust the on / off state of the sprinklers and the spraying area according to the latest data. For example, if a certain part of the fire is effectively controlled, the sprinklers in the corresponding area can be turned off to save resources. If a new fire point is discovered, the relevant sprinklers will be immediately activated for extinguishing;

[0111] Log recording and report generation, record all scoring calculation results and changes in the sprinkler system status, store them in the database for subsequent analysis and auditing, generate daily or weekly reports, display the scoring trend and the sprinkler system call situation, and help the management understand the safety status of the building;

[0112] User interface and visualization display, provide an intuitive user interface to display information such as the current fire situation, the status of each sprinkler system, and the personnel density distribution. Staff can view historical data, generate reports, and perform necessary manual operations through the interface;

[0113] Remote monitoring and management: Support remote access and management, enabling managers to monitor the system operation status at any time and place and make necessary adjustments.

[0114] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A closed foam water spray system, characterized in that: include: A response module, which integrates a fire detection sensor, captures early signs of fire, receives fire detection signals and initiates a fire extinguishing procedure, and is provided with a system main pipe (35) for introducing pressurized water, a foam liquid tank, an alarm component and a connection component; Several spray control modules are connected to the response module, including a spray unit and a control unit. The spray unit is composed of a pipe network and several spray heads. Each spray head is provided with an automatic control valve. The control unit is used to dynamically adjust the switch state of each spray head. The deployment management module is provided with a sprinkler system resource deployment mechanism. The callable evaluation value of the resources in each sprinkler system is calculated according to the deployment mechanism. The higher the evaluation value, the more suitable the resources in the system are to be called. A database is established to store the callable evaluation value and update it in real time. Monitoring and feedback module: connected with the response module, spray control module and deployment management module, monitors the working status of each module in real time and provides support for the decision-making of each module.

2. A closed foam water spray system according to claim 1, characterized in that: One end of the system main pipe (35) is connected to a plurality of spray control modules, and a zone valve (32) and a water flow indicator (30) are provided between the system main pipe (35) and each spray control module. The system main pipe (35) is provided with a system independent main valve (23). The other end of the system main pipe (35) is provided with a water supply pipe (34), and the end of the water supply pipe (34) close to the system main pipe (35) is provided with a signal gate valve (9); A drainage valve (7) is provided on the drainage pipe at the bottom of the foam liquid tank, a foam liquid circulation valve (3) is provided at the liquid circulation end of the foam liquid tank, and a liquid level meter (5) is also provided in communication with the liquid circulation end, and a liquid level meter discharge valve (2) and a liquid level meter inlet and outlet valve (4) are also provided between the liquid level meter (5) and the liquid circulation end; The alarm assembly comprises a wet alarm valve (16) arranged between a signal gate valve (9) and a system main pipe (35); an alarm control valve (15), a delay device and a pressure switch (28) are arranged on the wet alarm valve (16) in sequence; an alarm pipe (11) is arranged on the system main pipe (35); a hydraulic alarm bell (10) is arranged on the alarm pipe (11); and the alarm pipe (11) is connected to the pressure switch (28); The connection assembly is used to connect the foam liquid tank and the system main pipe (35), the connection assembly comprises a proportioning mixer (36) arranged on the system main pipe (35), a liquid injection valve (8) is arranged at the liquid injection end of the foam liquid tank, a foam liquid discharge pipe (22) is arranged between the proportioning mixer (36) and the liquid injection end of the foam liquid tank, a check valve (21), a foam liquid control valve (37) and a foam liquid shut-off valve (20) are arranged on the foam liquid discharge pipe (22), a foam liquid discharge valve (27) is also arranged at the discharge end of the foam liquid control valve (37), a foam liquid water inlet (1) is also arranged on the foam liquid tank, a foam liquid tank water inlet pipe (14) is arranged between the foam liquid water inlet (1) and the system main pipe (35), and a water supply control valve (13) is arranged on the foam liquid tank water inlet pipe (14); The connection assembly also includes a control component, which is used to control the state of the foam liquid control valve (37).

3. A closed foam water spray system according to claim 2, characterized in that: The control component comprises a control pipe (26) arranged between a water supply pipe (34) and a foam liquid control valve (37); a plug valve (25) with a pressure gauge is arranged at the connection position between the control pipe (26) and the foam liquid control valve (37); a control pipe water inlet valve (19) and a one-way valve (17) are arranged at a position close to the water supply pipe (34) on the control pipe (26); a pressure relief valve (38) and a manual pressure relief valve (33) are also arranged on the control pipe (26); and a pressure relief valve water supply valve (12) is also arranged between the two.

4. A closed foam water spray system according to claim 3, characterized in that: A filter (18) is provided on the water inlet pipe (14) of the foam liquid tank and on the control pipe (26).

5. A closed foam water spray system according to claim 4, characterized in that: The system main pipe (35) is connected to a plurality of spray units, and each connection point is provided with an auxiliary pump (31), and the auxiliary pump (31) is connected to the control unit.

6. A closed foam water spray system according to claim 5, characterized in that: A plurality of supply pipes are provided at the connection points between the system main pipe (35) and the plurality of spray units. The supply pipes are respectively connected to the connection points between other system main pipes (35) and the spray units. A call control valve is provided on each supply pipe, and the call control valve is connected to the deployment management module.

7. A closed foam water spray system according to claim 6, characterized in that: The deployment management module is connected to the liquid level meter (5) in the response module. An alarm threshold is set in the liquid level meter (5). When the liquid level in the foam liquid tank is lower than the alarm threshold, the deployment management module operates to search for and provide a callable spray system in a timely manner.

8. A closed foam water spray system according to claim 7, characterized in that: Different measurement factors are set in the allocation mechanism. The calculation of the callable evaluation value is subject to the comprehensive influence of different measurement factors and is obtained by the comprehensive evaluation values ​​corresponding to all the measurement factors. Factors considered include the type of building in which the closed loop foam sprinkler system is located.

9. A closed foam water spray system according to claim 8, characterized in that: A search range model is also provided in the deployment mechanism, and the search range model can constrain the search range of the available sprinkler system resources.

10. A closed foam water spray system according to claim 1, characterized in that: The monitoring and feedback modules include: Real-time data acquisition: Connect with multi-source sensors to form a dense sensor network to monitor the working status of equipment in each module in real time; Data analysis and processing: including the central server, which receives and processes data from different sensors, processes the data and provides the required data to each module; Intelligent decision support: Provide support for decision-making in each module based on comprehensive data analysis; Feedback mechanism: Regularly monitor the working status of each module and dynamically adjust according to the feedback data; User interface and visual display: Provides an intuitive user interface to display the operation information of each module. Staff can view historical data, generate reports, and perform necessary manual operations through the interface.

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