Air-water curtain system capable of being intelligently switched and control method of air-water curtain system

Abstract

The invention relates to the field of tunnel fire prevention and control, and particularly discloses an intelligently switchable gas-water curtain system and a control method thereof, the intelligently switchable gas-water curtain system is used for uniformly distributed smoke control partitions in a tunnel, the junction of the smoke control partitions is provided with a gas-water curtain tail end, and the gas-water curtain tail end is tubular and is transversely arranged at the top of the tunnel; a plurality of uniformly arranged nozzles are arranged on the lower side of the air-water curtain tail end, the air-water curtain tail end comprises a first electromagnetic valve and a second electromagnetic valve at the two ends, one end of the air-water curtain tail end is connected with an air supply pipe through the first electromagnetic valve, and the other end of the air-water curtain tail end is connected with a water supply pipe through the second electromagnetic valve; the smoke detection device is used for detecting the smoke concentration in the smoke control subarea. According to the smoke concentration state detected by the smoke sensing fire detector, opening and closing of the first electromagnetic valve and the second electromagnetic valve are controlled, intelligent switching of the air-water curtain tail end between the air curtain mode and the water curtain mode is achieved, and the response speed and the adaptive capacity of the system to different fire scenes are improved.

Description

Technical Field

[0001] This application belongs to the technical field of prevention and control of tunnel fires, and specifically relates to an intelligent switchable air-water curtain system and its control method. Background Art

[0002] As an important part of the transportation network, the safety of tunnels has always been a key concern in the field of public safety. In such places, once a fire breaks out, quickly and effectively controlling the spread of smoke and fire is the top priority. Traditionally, methods for controlling smoke and fire include air curtain and water curtain systems. The air curtain system forms a barrier by spraying gas to prevent smoke from spreading to safe areas; the water curtain system sprays water mist, which can not only reduce the surrounding temperature, prevent the spread of fire, but also capture soot particles through the water droplets in the water mist to reduce the spread of harmful substances.

[0003] However, existing systems often choose to install either an air curtain or a water curtain separately during design because they use different pipelines and control devices, which limits the ability to handle different situations in a fire. For example, although the air curtain can effectively prevent smoke from entering crowded areas, its effect is far inferior to that of the water curtain when the fire is large and rapid cooling or actual fire extinguishing is required. A single-function system cannot dynamically adjust according to the actual fire situation, which may cause waste of resources, such as maintaining water supply when the water curtain is not needed, or being unable to provide sufficient water volume when rapid cooling is required. It can be seen that both the existing air curtain system and water curtain system have certain defects and deficiencies in dealing with tunnel fires. Summary of the Invention

[0004] Aiming at the above defects or requirements for improvement in the prior art solutions, the purpose of the present invention is to overcome the limitations of traditional tunnel fire protection technologies, and propose an intelligent switchable air-water curtain system and its control method. This system can intelligently switch between the air curtain and the water curtain to adapt to different fire situations, improve flexibility and resource utilization efficiency, and at the same time reduce installation and maintenance costs.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: an intelligently switchable air and water curtain system, which is used for smoke control partitions evenly distributed in a tunnel, an air and water curtain end is arranged at the junction of the smoke control partitions, the air and water curtain end is tubular, and is arranged horizontally on the top of the tunnel, and a plurality of evenly arranged nozzles are arranged on the lower side of the air and water curtain end, the air and water curtain end includes a first solenoid valve and a second solenoid valve at both ends, one end of the air and water curtain end is connected to the air supply pipe through the first solenoid valve, and the other end is connected to the water supply pipe through the second solenoid valve, a smoke fire detector is arranged on the top of the smoke control partition, which is used to detect the smoke concentration in the smoke control partition, and also includes a controller, which is used to control the switch of the first solenoid valve and the second solenoid valve according to the smoke concentration state detected by the smoke fire detector, so as to realize the intelligent switching of the air and water curtain end between the air curtain mode and the water curtain mode.

[0006] Preferably, a bypass pipe is connected between the two ends of the air-water curtain, and a third solenoid valve is provided on the bypass pipe.

[0007] Preferably, the smoke fire detectors are arranged at multiple points to detect smoke concentration at multiple locations within the smoke control zone.

[0008] Preferably, the nozzle at the end of the air-water curtain is a strip-shaped hole nozzle.

[0009] Preferably, the nozzle at the end of the air-water curtain is an adjustable electrically controlled nozzle, and the opening size and spray angle of the nozzle are adjusted by a controller.

[0010] Preferably, the air supply pipe connects the air intake branch pipe and the air intake main pipe, the air intake branch pipe is fixed on the side wall of the tunnel, the air intake main pipe is connected to the air storage tank, the water supply pipe connects the water distribution branch pipe and the water distribution main pipe, the water distribution branch pipe is fixed on the other side wall of the tunnel, and the water distribution main pipe is connected to the water tank.

[0011] Preferably, a gas pressure sensor is provided on the gas supply pipe, and a water pressure sensor is provided on the water supply pipe. The controller adjusts the flow rates of gas and water supply according to the detection data of the gas pressure sensor and the water pressure sensor to optimize the formation effect of the gas-water curtain.

[0012] Preferably, when it is detected that the air supply pressure or the water supply pressure is lower than a preset threshold, the controller triggers an alarm and links the air and water curtain ends of the adjacent smoke control partitions to start.

[0013] Preferably, the controller is preset with multiple operating modes, including air curtain priority mode, water curtain priority mode and automatic switching mode, to adapt to different fire prevention and control needs.

[0014] Preferably, the controller is connected to a remote monitoring system, which is used to receive the operating status of the air-water curtain system in real time and send alarm information to the management center when an abnormal situation occurs.

[0015] Preferably, a plurality of ends of the air-water curtain are arranged in parallel.

[0016] The present invention also discloses a control method based on the above-mentioned air-water curtain system capable of intelligent switching, including the following steps:

[0017] S1. Detect the smoke concentration state in the smoke control zone through the smoke detector arranged at the top of the smoke control zone;

[0018] S2. When it is detected that the smoke concentration is less than the first threshold, control the first solenoid valve to open, so that gas enters from one end of the end of the air-water curtain to form an air curtain for isolating smoke;

[0019] S3. When it is detected that the smoke concentration is greater than the second threshold, control the second solenoid valve to open and the first solenoid valve to close, so that water enters from the other end of the end of the air-water curtain to form a water curtain for enhancing smoke isolation;

[0020] S4. When it is detected that the smoke concentration is less than the first threshold again, control the second solenoid valve to close and the first solenoid valve to open, and restore to the air curtain;

[0021] Wherein, the second threshold is greater than the first threshold.

[0022] Preferably, in step S3, when the water curtain mode runs continuously for more than the set time and the smoke concentration does not decrease, the controller starts the linkage protection of forming a water curtain in the adjacent smoke control zone.

[0023] Preferably, a bypass pipe is also connected between the two ends of the end of the air-water curtain, and a third solenoid valve is arranged on the bypass pipe. In step S2, the third solenoid valve is also opened while the first solenoid valve is opened, and in steps S3 and S4, the third solenoid valve remains open.

[0024] Preferably, the smoke detectors are arranged at multiple points, and the smoke concentration is the average value detected at multiple points.

[0025] The beneficial effects of the present invention are as follows:

[0026] This system can intelligently switch between the air curtain and the water curtain according to the smoke concentration status detected by the smoke fire detector. This intelligent switching mechanism significantly improves the system's response speed and adaptability to different fire scenarios. It can quickly form an air curtain at the initial stage of smoke to isolate the smoke, and timely switch to the water curtain when the fire intensifies to enhance the isolation effect, while also taking into account cooling and extinguishing. By integrating the gas and water supply systems and using the intelligent switching of the common air-water curtain end, the use of resources is optimized, and the installation and maintenance costs of this system are lower than those of traditional separate air curtain and water curtain systems. In addition, the design of adding a bypass pipe and a third solenoid valve enables the gas or water to be ejected simultaneously from both sides of the end, forming a more uniform and wider coverage air curtain or water curtain, improving the efficiency and reliability of isolating the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is an overall schematic diagram of the intelligent-switchable air-water curtain system shown in the embodiment of the present invention;

[0028] Figure 2 FIG. is a connection schematic diagram of the air-water curtain end shown in the embodiment of the present invention;

[0029] Figure 3 FIG. is a connection schematic diagram of the controller shown in the embodiment of the present invention;

[0030] Figure 4 FIG. is a control flowchart of the control method of the intelligent-switchable air-water curtain system of the present invention.

[0031] DESCRIPTION OF REFERENCE NUMERALS: 1-smoke control zone, 2-air-water curtain end, 3-first solenoid valve, 4-air supply pipe, 5-second solenoid valve, 6-water supply pipe, 7-smoke fire detector, 8-controller, 9-bypass pipe, 10-third solenoid valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the present invention.

[0033] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a full understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present application.

[0034] Please refer to Figures 1-3 In this embodiment, an intelligent switchable air-water curtain system is provided, which is used for the smoke control zones 1 evenly distributed in the tunnel. At the junction of the smoke control zones 1, the end 2 of the air-water curtain is provided. The end 2 of the air-water curtain is tubular and horizontally arranged at the top of the tunnel, so that the air-water curtain can cover the width of the entire smoke control zone, effectively separating the smoke from the safe area. A plurality of evenly arranged nozzles are provided on the lower side of the end 2 of the air-water curtain. This arrangement ensures that the ejected gas or water mist can evenly cover the entire area, improving the effect of blocking smoke and extinguishing fire. The end 2 of the air-water curtain includes a first solenoid valve 3 and a second solenoid valve 5 at both ends. One end of the end 2 of the air-water curtain is connected to the air supply pipe 4 through the first solenoid valve 3, and the other end is connected to the water supply pipe 6 through the second solenoid valve 5.

[0035] In addition, a smoke detector 7 is provided at the top of the smoke control zone 1 for detecting the smoke concentration in the smoke control zone 1. The function of the smoke detector 7 is to monitor the smoke concentration in real time, providing a basis for the system to switch the air curtain or water curtain, so as to ensure that the most appropriate protection measures are taken in different fire stages.

[0036] It also includes a controller 8, which is used to control the opening and closing of the first solenoid valve 3 and the second solenoid valve 5 according to the smoke concentration state detected by the smoke detector 7, realizing the intelligent switch between the air curtain mode and the water curtain mode of the end 2 of the air-water curtain. The setting of the controller 8 optimizes the response time and operation accuracy of the system, ensuring that it can quickly and accurately switch to the appropriate protection mode when a fire occurs, minimizing the harm caused by smoke and fire.

[0037] Please refer to Figure 2 Furthermore, a bypass pipe 9 is connected between the two ends of the end 2 of the air-water curtain, and a third solenoid valve 10 is provided on the bypass pipe 9. This design enables the gas or water input from either end of the end 2 of the air-water curtain to quickly reach the other end through the bypass pipe 9, realizing air or air-water intake at both ends, and obtaining a more uniform air curtain or water curtain distribution, enhancing the overall isolation effect and flexibility of the system.

[0038] In addition, the smoke fire detectors 7 are arranged at multiple points and are used to detect the smoke concentration at multiple positions within the smoke control zone 1. The smoke fire detectors 7 arranged at multiple points can provide a wider monitoring coverage, ensuring a more comprehensive and accurate detection of smoke, thereby enhancing the timeliness and adaptability of the system response. For example, when any smoke fire detector 7 detects smoke, the system will immediately activate the end of the air-water curtain 2 to form a preliminary smoke barrier to block the spread of smoke to the unaffected area. In addition, the controller 8 will collect the smoke data of all the smoke fire detectors 7 in real time and calculate the average value to reflect a more accurate fire situation. This average value calculation takes into account that the influence of local abnormal points is relatively small and can more truly represent the smoke concentration level of the entire smoke control zone.

[0039] In some embodiments, the nozzles of the end of the air-water curtain 2 are strip-hole nozzles. The strip-hole nozzles can provide a more uniform and extensive spraying surface, which is suitable for forming a continuous air curtain or water curtain, effectively isolating the smoke and reducing the risk of fire spread. Due to its simple structure, this nozzle design not only has a lower cost but also is easy to maintain, and is suitable for application scenarios that require rapid deployment and high cost-effectiveness.

[0040] In some other embodiments, the nozzles of the end of the air-water curtain 2 are adjustable electronically controlled nozzles. The opening size and spraying angle of the nozzles are adjusted by the controller 8. This adjustable electronically controlled nozzle allows the specific spraying parameters to be adjusted according to different fire situations and requirements, enabling the system to more precisely control the formation of the air curtain or water curtain to adapt to complex and changeable actual application scenarios and enhance the protection effect. The intelligent configuration of the electronically controlled nozzles improves the adaptability of the system, can optimize the response to complex and changeable actual application scenarios, and significantly enhances the protection effect. Although the cost of this type of nozzle is relatively high and it involves a more complex installation and maintenance process, its highly customizable and superior control functions make it an ideal choice for high-risk areas, especially in places with extremely high requirements for the protection effect.

[0041] The air supply pipe 4 connects the intake branch pipe and the intake main pipe. The intake branch pipe is fixed on the side wall of the tunnel, and the intake main pipe is connected to the gas storage tank. This setting allows the gas to be uniformly distributed from the gas storage tank to each intake branch pipe, ensuring that each end of the air-water curtain can quickly and evenly receive sufficient gas when the air curtain needs to be formed. The water supply pipe 6 connects the water distribution branch pipe and the water distribution main pipe. The water distribution branch pipe is fixed on the other side wall of the tunnel. The water distribution branch pipe and the intake branch pipe are arranged oppositely. The water distribution main pipe is connected to the water storage tank. This configuration ensures that the water source can be uniformly distributed from the water storage tank to each water distribution branch pipe, and when the water curtain needs to be formed, each end of the air-water curtain can also quickly and evenly receive sufficient water volume.

[0042] Furthermore, a gas pressure sensor is provided on the gas supply pipe 4, and a water pressure sensor is provided on the water supply pipe 6. The controller 8 adjusts the flow of gas supply and water supply according to the detection data of the gas pressure sensor and the water pressure sensor to optimize the formation effect of the gas-water curtain. The gas pressure sensor is used to monitor the pressure of the gas in the gas supply pipe 4 in real time and transmit the detection data to the controller 8. The water pressure sensor monitors the water pressure in the water supply pipe 6 and also feeds back the data to the controller 8. The controller 8 adjusts the flow according to these data to ensure that the gas curtain or water curtain formed by the gas-water curtain terminal 2 can effectively block the smoke and enhance the fire prevention effect. When it is detected that the gas supply pressure or water supply pressure is lower than the preset threshold, the controller 8 triggers an alarm and links the gas-water curtain terminal 2 of the adjacent smoke control partition 1 to start. This means that once the gas supply or water supply system fails and cannot provide sufficient airflow or water flow, the controller 8 will immediately start the preset alarm mechanism and start the gas-water curtain terminal 2 in the adjacent smoke control partition 1 at the same time to ensure that when the local area cannot operate normally, the adjacent area can still work effectively, ensuring that the smoke in the tunnel is quickly isolated and ensuring the safety of personnel.

[0043] In addition, the controller 8 is preset with multiple operation modes, including air curtain priority mode, water curtain priority mode and automatic switching mode, to meet different fire prevention and control needs. The air curtain priority mode is used to prioritize the air curtain mode to quickly isolate the smoke when a fire occurs; the water curtain priority mode prioritizes the water curtain mode when the smoke concentration is high to enhance the smoke isolation effect; the automatic switching mode automatically selects the best mode according to the specific situation of the fire to ensure maximum safety protection.

[0044] In this embodiment, the controller 8 is connected to a remote monitoring system, which is used to receive the operating status of the air and water curtain system in real time and send alarm information to the management center when an abnormal situation occurs. The remote monitoring system is connected to the controller 8 via a wireless network, and can obtain the working status of the air and water curtain system in real time, discover potential faults or abnormal situations in time, and transmit the alarm information to the management center so that relevant personnel can handle it in time to avoid accidents.

[0045] In addition, multiple gas-water curtain ends 2 can be arranged in parallel. By arranging multiple gas-water curtain ends 2 in parallel, the coverage range of the air curtain or water curtain can be increased, enabling the control of smoke or fire sources in a wider area. Each gas-water curtain end 2 is equipped with an independently controlled solenoid valve. This layout not only improves the flexibility and coverage ability of the system but also brings other significant advantages. For example, in the configuration where multiple gas-water curtain ends 2 are arranged in parallel, if one end malfunctions or requires maintenance, the other ends can still continue to operate, thus not affecting the operation and protection effect of the entire system. This is crucial for ensuring the safety of important places such as tunnels, guaranteeing the continuous operation of the system in case of emergencies. In addition, in specific scenarios, this parallel arrangement also allows for the flexible implementation of more complex protection modes. For example, it can be designed as an alternating arrangement of air curtain - water curtain - air curtain or water curtain - air curtain - water curtain. This alternating configuration can provide a stronger isolation effect according to the specific fire situation and smoke diffusion characteristics.

[0046] Please refer to Figure 4 , another embodiment of the present invention proposes a control method based on the above intelligent-switchable gas-water curtain system, including the following steps:

[0047] S1, Detect the smoke concentration status in the smoke control zone 1 through the smoke detector 7 installed at the top of the smoke control zone 1; this step is to monitor the smoke condition in the smoke control zone 1 in real time, ensuring that the system can respond at the initial stage of smoke generation, which is the basis for the intelligent control of the system.

[0048] S2, When the detected smoke concentration is less than the first threshold, control the first solenoid valve 3 to open, allowing gas to enter from one end of the gas-water curtain end 2 to form an air curtain for isolating the smoke; the effect of this step is to quickly activate the air curtain when the smoke concentration is low, effectively preventing the smoke from spreading to key areas, thereby protecting personnel safety and property from smoke damage.

[0049] S3, When the detected smoke concentration is greater than the second threshold, control the second solenoid valve 5 to open and the first solenoid valve 3 to close, allowing water to enter from the other end of the gas-water curtain end 2 to form a water curtain for enhancing smoke isolation; the purpose of this step is to, when the fire is large or the smoke concentration is high, start the water curtain to perform more effective smoke isolation and fire extinguishing operations, significantly improving the protection effect and reducing the harm caused by the fire.

[0050] S4, When the detected smoke concentration is less than the first threshold again, control the second solenoid valve 5 to close and the first solenoid valve 3 to open, restoring to the air curtain state; the effect of this step is to enable the system to quickly return to the more economical air curtain state after the smoke concentration decreases, optimizing resource use while maintaining the necessary smoke isolation effect.

[0051] Among them, the second threshold is greater than the first threshold. The purpose of setting two thresholds is to dynamically adjust the protection strategy according to different levels of smoke concentration, ensuring that the system can not only effectively respond to fires but also avoid repeated state switches, achieving the best balance between economy and safety.

[0052] Furthermore, in step S3, when the water curtain mode continues to operate for more than the set time and the smoke concentration does not decrease, the controller activates the water curtain formation in the adjacent smoke control zone 1 for linkage protection. At this time, the controller 8 will monitor according to the preset time parameters. Once it detects that the water curtain mode fails to effectively reduce the smoke concentration for a long time, the controller 8 will activate the water curtain at the end 2 of the air-water curtain in the adjacent smoke control zone to ensure that the fire prevention effect of the entire area is not affected by local failures. Through this linkage protection, when the water curtain mode fails to completely solve the problem, the air-water curtain system in the adjacent area can be automatically mobilized to enhance the smoke isolation ability of the entire tunnel area, thereby effectively improving the overall efficiency of fire prevention and control and ensuring fire safety.

[0053] Furthermore, a bypass pipe 9 is also connected between the two ends of the air-water curtain end 2, and a third solenoid valve 10 is provided on the bypass pipe 9. In step S2, the third solenoid valve 10 is opened simultaneously when the first solenoid valve 3 is opened, and in steps S3 and S4, the third solenoid valve 10 remains open. The purpose of this setting is to enable both gas and water to be transmitted from one port to another through the bypass pipe 9, thus ensuring the uniform distribution of the air-water curtain and rapid response. In the air curtain mode, the opening of the third solenoid valve 10 can help form a more complete air curtain barrier, and maintaining the open state in the water curtain mode helps to quickly deploy the water curtain, increasing the speed and efficiency of the fire extinguishing or cooling effect.

[0054] Furthermore, the smoke detectors 7 are arranged at multiple points, and the smoke concentration is the average value of the detections at multiple points. By arranging the smoke detectors 7 at multiple points, a wider area can be covered, ensuring the comprehensiveness and accuracy of the monitoring data. Calculating the average value of the smoke concentration as the basis for the system response can avoid the interference of local abnormal data, provide more stable and reliable monitoring results, thereby making the system response more accurate and effectively avoiding the situation of false triggering or delayed triggering of the system due to local smoke.

[0055] The present invention is applicable to enclosed spaces such as tunnels, providing an efficient and economical solution to address fire and smoke spread problems. The core innovation of this air-water curtain system lies in its ability to dynamically switch between the air curtain and the water curtain based on the real-time monitored smoke concentration, so as to rapidly respond to different fire scenarios in the most suitable way. The end of the air-water curtain 2 is designed to be able to connect to both gas and water sources simultaneously, and the flow of gas or water is controlled by an in-built solenoid valve. In addition, the design of the bypass pipe 9 and the third solenoid valve 10 is introduced into the system, further enhancing the rapid formation ability and uniformity of the air curtain and the water curtain. By arranging multiple air-water curtain ends 2 in parallel, the system can cover a wider area, effectively increasing the protection range, and still maintain the overall function operation when some ends fail, enhancing the reliability of the system. The multi-point arrangement of the smoke fire detectors 7 works in cooperation with the integrated controller 8 to intelligently adjust the protection strategy according to the average value of the detected smoke concentration. This not only optimizes the use of resources, reduces energy waste, but also significantly improves the efficiency of personnel safety and property protection. The control methods include the system response based on the smoke concentration threshold, and the function of the electric control nozzle that flexibly adjusts the nozzle output, enabling the system to precisely control the protection requirements under various fire conditions.

[0056] In summary, the air-water curtain system of the present invention not only has a rapid response, but also has high adaptability and economic benefits. It is particularly suitable for application in tunnels and other similar enclosed or semi-enclosed spaces, providing an innovative and practical technical solution for the public safety field. Through this advanced air-water curtain system, the risks brought by fires can be effectively managed and controlled, significantly enhancing the emergency response ability and the environmental safety level.

[0057] The above-mentioned drawings are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, rather than for limiting purposes. It is easy to understand that the processes shown in the above-mentioned drawings do not indicate or limit the chronological order of these processes. Additionally, it is also easy to understand that these processes can be executed, for example, synchronously or asynchronously in multiple modules.

[0058] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. An intelligent switchable air-water curtain system, which is used for the smoke control zones (1) evenly distributed in the tunnel, and is characterized in that, An air-water curtain terminal (2) is arranged at the junction of the smoke control partition (1). The air-water curtain terminal (2) is tubular and is arranged transversely on the top of the tunnel. A plurality of uniformly arranged nozzles are arranged on the lower side of the air-water curtain terminal (2). The air-water curtain terminal (2) comprises a first solenoid valve (3) and a second solenoid valve (5) at two ends. One end of the air-water curtain terminal (2) is connected to an air supply pipe (4) through the first solenoid valve (3), and the other end is connected to a water supply pipe (6) through the second solenoid valve (5). A smoke fire detector (7) is arranged on the top of the smoke control partition (1) for detecting the smoke concentration in the smoke control partition (1). The controller (8) is also included for controlling the switch of the first solenoid valve (3) and the second solenoid valve (5) according to the smoke concentration state detected by the smoke fire detector (7), so as to realize the intelligent switching of the air-water curtain terminal (2) between the air curtain mode and the water curtain mode.

2. The intelligent-switchable air-water curtain system according to claim 1, wherein: A bypass pipe (9) is also connected between the two ends of the air-water curtain end (2), and a third solenoid valve (10) is provided on the bypass pipe (9).

3. The intelligent-switchable air-water curtain system according to claim 2, wherein: The smoke fire detectors (7) are arranged at multiple points and are used to detect smoke concentration at multiple locations within the smoke control zone (1).

4. The intelligent-switchable air-water curtain system according to claim 2 or 3, characterized in that: The nozzle at the end (2) of the air-water curtain is a strip-shaped hole nozzle.

5. The intelligent-switchable air-water curtain system according to claim 2 or 3, characterized in that: The nozzle at the end (2) of the air-water curtain is an adjustable electrically controlled nozzle, and the opening size and spray angle of the nozzle are adjusted by a controller (8).

6. The intelligent-switchable air-water curtain system according to claim 1, characterized in that: The air supply pipe (4) is connected to the air intake branch pipe and the air intake main pipe, the air intake branch pipe is fixed to the side wall of the tunnel, the air intake main pipe is connected to the air storage tank, the water supply pipe (6) is connected to the water distribution branch pipe and the water distribution main pipe, the water distribution branch pipe is fixed to the other side wall of the tunnel, and the water distribution main pipe is connected to the water storage tank.

7. The intelligent-switchable air-water curtain system according to claim 6, wherein: The gas supply pipe (4) is provided with a gas pressure sensor, the water supply pipe (6) is provided with a water pressure sensor, and the controller (8) adjusts the flow rates of gas supply and water supply according to the detection data of the gas pressure sensor and the water pressure sensor, so as to optimize the formation effect of the gas-water curtain.

8. The intelligent-switchable air-water curtain system according to claim 7, wherein: When it is detected that the air supply pressure or the water supply pressure is lower than a preset threshold, the controller (8) triggers an alarm and links the air and water curtain end (2) of the adjacent smoke control partition (1) to start.

9. The intelligent-switchable air-water curtain system according to claim 6, wherein: The controller (8) is preset with a plurality of operating modes, including an air curtain priority mode, a water curtain priority mode and an automatic switching mode, so as to adapt to different fire prevention and control requirements.

10. The intelligent-switchable air-water curtain system according to claim 1, wherein: The controller (8) is connected to a remote monitoring system, which is used to receive the operating status of the air-water curtain system in real time and send alarm information to the management center when an abnormal situation occurs.

11. The intelligent-switchable air-water curtain system according to claim 1, wherein: A plurality of air-water curtain ends (2) are arranged in parallel.

12. A control method for an intelligent-switchable air-water curtain system according to any one of claims 1-11, characterized in that, The following steps are involved: S1, detecting the smoke concentration state in the smoke control partition (1) by means of a smoke fire detector (7) arranged on the top of the smoke control partition (1); S2, when it is detected that the smoke concentration is less than a first threshold value, the first solenoid valve (3) is controlled to open, so that gas enters from one end of the air-water curtain end (2) to form an air curtain for isolating the smoke; S3. When it is detected that the flue gas concentration is greater than the second threshold, control the second solenoid valve (5) to open and the first solenoid valve (3) to close, so that water enters from the other end of the gas-water curtain end (2) to form a water curtain for enhancing the flue gas isolation. S4. When it is detected that the flue gas concentration is less than the first threshold again, control the second solenoid valve (5) to close and the first solenoid valve (3) to open, and restore to the gas curtain. Wherein, the second threshold is greater than the first threshold.

13. The control method according to claim 12, characterized in that, In step S3, when the water curtain mode runs continuously for more than the set time and the flue gas concentration does not decrease, the controller (8) starts the linkage protection of the water curtain formation in the adjacent smoke control zone (1).

14. The control method according to claim 12, wherein A bypass pipe (9) is also connected between the two ends of the gas-water curtain end (2). A third solenoid valve (10) is arranged on the bypass pipe (9). In step S2, the third solenoid valve (10) is also opened while the first solenoid valve (3) is opened. In steps S3 and S4, the third solenoid valve (10) remains open.

15. The control method according to claim 12, wherein The smoke detectors (7) are arranged at multiple points, and the flue gas concentration is the average value detected at multiple points.

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