A high-pressure compressed air foam fire extinguishing system for super high-rise buildings and application method thereof

Abstract

The application provides a high-pressure compressed air foam fire extinguishing system for super high-rise buildings and an application method, wherein a high-pressure compressed air foam generating device is communicated with a high-pressure fire vertical pipe; the high-pressure fire vertical pipe is vertically arranged on an outer wall of the super high-rise building or in the super high-rise building, and is divided into a plurality of fire extinguishing sub-zones by setting sub-zone valves; a set of combined compressed air foam releasing device is arranged in each floor; a system controller is arranged in a fire control center of the super high-rise building, and remotely controls opening and closing of each sub-zone valve, opening and closing and opening degree of a foam flow distribution valve; the high-pressure compressed air foam generating device is provided with a central controller, and the central controller controls the air-liquid ratio of the foam to gradually increase with foam supply time; and the application can realize fire extinguishing and rescue for super high-rise buildings with a height of more than 200 m, building outer facades, curtain walls and other large fires, has high foam supply height, large flow, rapid response, strong fire extinguishing capacity, simple operation, safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of super high-rise building fire extinguishing, and in particular to a super high-rise building high-pressure compressed air foam fire extinguishing system and an application method thereof. Background Art

[0002] my country boasts over 12,000 supertall buildings over 100 meters tall and over 1,300 over 200 meters tall, making it the country with the largest number of supertall buildings in the world. However, the height and complex structure of supertall buildings make firefighting extremely difficult, easily causing significant casualties and property damage. Firefighting fluid supply and extinguishing in supertall buildings has become a global challenge facing the firefighting industry.

[0003] Compressed air foam fire extinguishing technology offers advantages such as high fire extinguishing efficiency, minimal water damage, low density, and high conveying heights. It is an important development direction for solving the difficult problem of fire fighting in super-high-rise buildings. However, due to the influence of gravity during the long-distance vertical conveying of compressed air foam, gas-liquid separation is easily caused. The flow rate of the foam mixture decreases significantly with the conveying height and the foam supply time, resulting in increasing pressure in the overall conveying pipeline and decreasing flow rate. Furthermore, the operating pressure of existing compressed air foam systems at home and abroad is low, generally only within 1.0MPa and no more than 1.2MPa, which is a low-pressure system. As the foam conveying height increases and liquid continues to accumulate in the pipeline, once the conveying pipeline pressure exceeds the system operating pressure, it will not be able to produce and output foam normally, resulting in failure. Existing tests have shown that the effective foam supply height of the existing low-pressure compressed air foam system is only 200m, and the flow rate is small, which can only meet the needs of 1 to 2 foam guns. Beyond 200m, the foam mixture flow rate is even smaller, the range is shorter, and the foam is drier, resulting in a very limited fire extinguishing capacity. Therefore, it cannot meet the fire extinguishing needs of super-high-rise buildings over 200m and large-scale fires such as building facades and curtain wall insulation.

[0004] In response to the problem of limited foam supply height in the existing low-pressure compressed air foam system, the existing technologies CN202010057523.5 A fixed-mobile combined compressed air foam fire extinguishing system suitable for super high-rise buildings and its design method, CN 202010540512.2 A super high-rise building fire extinguishing system and fire extinguishing method, and CN 202210469277.3 Compressed air foam system alarm and linkage control system all realize the application of compressed air foam fire extinguishing technology in super high-rise buildings by adopting a fire extinguishing method that combines multiple compressed air foam generating devices in series and fixed-mobile combination, that is: the low-pressure compressed air foam generating device is arranged on the top floor, equipment floor or refuge floor of the super high-rise building, and a fire connector is provided at the bottom of the building to facilitate the connection of a mobile compressed air foam fire truck. Through the fixed-mobile combination of the mobile compressed air foam fire truck and the fixed compressed air foam generating device, and the coordinated supply of foam up and down, the foam supply at different heights of the super high-rise building is realized. The above-mentioned method uses multiple compressed air foam generating devices, resulting in high project costs. Furthermore, in actual engineering applications, the requirements are high, the operation is complex, the response speed is slow, and the operation and maintenance are difficult, making it difficult to apply to existing super-high-rise buildings. Furthermore, due to the low flow rate, the existing method mainly uses ordinary fire hydrant boxes to release foam. The foam guns in the fire hydrant boxes are closed when not in use and are only opened after the firefighters arrive. In addition, the existing foam guns have a special throttling design to increase the range, and the outlet diameter is small, generally only 19mm, which directly affects the timely and smooth spray release of the foam. After the system is started, closing the terminal fire hydrant or limiting the flow will cause a large amount of liquid to settle in the foam, the pipeline pressure will increase, and the flow rate will decrease, affecting the continuous, stable and effective foam supply. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of existing fire extinguishing technology and disclose a high-pressure compressed air foam fire extinguishing system and fire extinguishing method for super high-rise buildings with high foam supply height, large flow, rapid response, strong fire extinguishing ability, simple operation, safety and reliability. Based on the "one pump to the top" fire extinguishing technology and tactics, it can achieve fire extinguishing and fighting of large fires such as super high-rise buildings over 200 meters and building facades, curtain wall insulation, etc., and can be used in newly built super high-rise buildings as well as in existing super high-rise buildings.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A high-pressure compressed air foam fire extinguishing system for super high-rise buildings, comprising a high-pressure compressed air foam generating device, a high-pressure fire riser, a zoning valve, a foam flow distribution valve, a combined compressed air foam releasing device, and a system controller;

[0008] The high-pressure compressed air foam generating device is connected to the high-pressure fire standpipe through a high-pressure fire pipe, a high-pressure fire hose, or a high-pressure water pump connector; the high-pressure compressed air foam generating device is provided with a central controller, and the central controller controls the gas-liquid ratio of the foam to gradually increase with the foam supply time;

[0009] The high-pressure fire-fighting riser is vertically installed on the outer wall of a super high-rise building or inside a super high-rise building, and is divided into several fire-fighting zones by setting a zone valve, and each zone valve is set at the top of the fire-fighting zone;

[0010] Each fire extinguishing zone contains several floors, and each floor is equipped with a set of combined compressed air foam release devices, which are connected to the high-pressure fire riser through a fire pipe and a foam flow distribution valve;

[0011] The system controller is arranged in the fire control center of the super high-rise building, and remotely controls the opening and closing of each partition valve and the opening and closing and opening degree of the foam flow distribution valve.

[0012] Furthermore, the high-pressure compressed air foam generating device includes a fire water tank and a water supply pipeline provided with a water supply valve, and the fire water tank is replenished with water through a water replenishment valve;

[0013] It also includes a foam liquid tank and a foam liquid pipeline that is sequentially provided with a liquid supply valve, a high-pressure foam liquid pump, and a foam liquid flow meter. The foam liquid tank is replenished with liquid through a liquid replenishment valve. The foam liquid pipeline is connected to the water supply pipeline to form a foam mixed liquid pipeline, and is sequentially connected to a gas-liquid mixer through medium and low pressure fire pumps, a foam mixed liquid flow meter, and a liquid regulating valve. A pressure relief valve is provided between the medium and low pressure fire pumps and the foam mixed liquid flow meter.

[0014] It also includes a medium- and high-pressure air compressor and a high-pressure gas supply pipeline equipped with a high-pressure buffer gas tank, a one-way valve, a high-pressure gas flow meter, and a high-pressure gas flow regulating valve in sequence, and the high-pressure gas supply pipeline is connected to the gas-liquid mixer;

[0015] The gas-liquid mixer mixes gas and liquid and is connected to the foam output port, which is connected to the high-pressure fire standpipe through the foam output port to provide high-pressure compressed air foam to the high-pressure fire standpipe;

[0016] The central controller circuit connects and controls the high-pressure foam liquid pump and foam liquid flowmeter of the foam liquid pipeline, the foam mixed liquid flowmeter and liquid regulating valve of the foam mixed liquid pipeline, and the high-pressure gas flowmeter and high-pressure gas flow regulating valve of the high-pressure gas supply pipeline. It automatically adjusts the flow rate to the set flow rate according to the back pressure of each pipeline, and ensures the stability of the foam flow input into the high-pressure fire riser through adaptive control.

[0017] Furthermore, when the bubble supply height exceeds 200m, the central controller starts the function of gradually increasing the gas-liquid ratio along with the bubble supply time, and the gas-liquid ratio increases by 0.01-2.0 per minute.

[0018] Furthermore, the high-pressure compressed air foam generating device adopts a fixed compressed air foam generating module or a mobile compressed air foam generating fire truck.

[0019] Furthermore, the combined compressed air foam releasing device adopts a combination of a compressed air foam plug box and a compressed air foam electrically controlled intelligent cannon or a compressed air foam spraying device. The flow rates of the compressed air foam plug box and the compressed air foam electrically controlled intelligent cannon are automatically preset by the foam flow distribution valve and are manually or electrically regulated.

[0020] Furthermore, the compressed air foam hydrant box includes a box body and a set of compressed air foam hydrants installed in the box body, the compressed air foam hydrant includes a movable hinge joint, a foam branch pipe, a fire hose reel, an opening and closing valve, a fire hose, and a compressed air foam gun; the fire hose reel is fixed in the box body through a movable hinge joint, and a fire hose is provided on the fire hose reel; one end of the fire hose is connected to the foam gun, and the other end is connected to the foam branch pipe outlet fixed on the box body through the opening and closing valve, and the foam branch pipe inlet extends out of the box body and is connected to the high-pressure fire riser.

[0021] Furthermore, a relief valve is provided at the bottom of the high-pressure fire-fighting riser, and the overpressure foam or residual liquid in the pipeline is discharged to the sewage well through the relief valve.

[0022] Another aspect of the present invention further provides a fire extinguishing application method using any of the above-mentioned high-pressure compressed air foam fire extinguishing systems for super high-rise buildings, comprising:

[0023] S1. Normal standby: Under normal circumstances, each partition valve is in the normally open state, and the combined compressed air foam release device is in the standby state;

[0024] S2, system start: when a fire occurs in a super high-rise building, the on-site personnel start the high-pressure compressed air foam generating device to supply foam to the high-pressure fire riser, and start to discharge compressed air foam from the compressed air foam electrically controlled intelligent gun or the compressed air foam spraying device in the combined compressed air foam release device located in the roof fire extinguishing subarea; after the system controller receives the specific floor fire alarm signal, it immediately and quickly opens the foam flow distribution valve of the corresponding floor to the preset position I, the valve is fully open, and the discharge of compressed air foam from the compressed air foam electrically controlled intelligent gun in the combined compressed air foam release device is started, to ensure that when the compressed air foam plug box is not used by the fire fighters, the gas and foam in the pipeline can be discharged from the compressed air foam electrically controlled intelligent gun in time, to minimize the phenomenon of foam liquid deposition and flow reduction caused by pressure build-up or flow limitation; at the same time, the subarea valve corresponding to the fire extinguishing subarea of the fire floor is quickly closed, to shorten the foam delivery response time and maximize the foam discharge speed.

[0025] S3, stable foam supply: when the fire is located at a low floor, the high-pressure compressed air foam generating device stably outputs foam to the high-pressure fire riser according to the set flow rate and gas-liquid ratio, and then delivers it to the combined compressed air foam release device for spraying; when the fire is located at a high floor, the high-pressure compressed air foam generating device adjusts the flow rate and gas-liquid ratio to the set value by automatically adjusting the valve opening degree and the foam pump speed through the central controller according to the back pressure of the foam output pipeline, and continuously and stably outputs high-quality foam to the high-pressure fire riser according to the set parameters, to overcome the high back pressure after a long vertical distance, and then deliver it to the combined compressed air foam release device for spraying; the gas-liquid ratio of the foam is gradually increased with the foam supply time through the central controller.

[0026] S4, foam spraying fire extinguishing: when the compressed air foam electrically controlled intelligent gun sprays and covers the fire source, the compressed air foam electrically controlled intelligent gun is remotely or on-site controlled for foam spraying fire extinguishing; when the compressed air foam electrically controlled intelligent gun cannot spray and cover the fire source, the foam gun of the compressed air foam plug box in the combined compressed air foam release device is used by the fire fighters for fire extinguishing, the on-off valve of the compressed air foam plug box is first opened, then the foam flow distribution valve is adjusted to the preset position II by remote or on-site adjustment, the opening degree is 5%-80%, the flow through path ratio of the compressed air foam plug box and the compressed air foam electrically controlled intelligent gun is controlled, the foam flow of the two is automatically controlled and distributed, and the actual pressure and flow rate of the foam gun of the compressed air foam plug box can be automatically or manually controlled and adjusted in real time.

[0027] Further, when the foam supply height exceeds 200 m, the central controller starts the control program to gradually increase the gas-liquid ratio of the foam with the foam supply time, and the gas-liquid ratio increases by 0.01-2.0 per minute.

[0028] Furthermore, the high-pressure compressed air foam generating device adopts a fixed compressed air foam generating module, which is installed on the first floor of a super high-rise building or in a fire-fighting equipment room; or adopts a mobile compressed air foam generating fire truck, which is parked on the road near the building.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention adopts an adaptively controlled high-pressure compressed air foam generating device with a gas-liquid ratio increasing function, which can minimize the liquid deposition in the high-pressure fire riser, significantly improve the continuous and stable foam supply on high floors, and realize large-flow stable and efficient foam supply for super high-rise buildings over 200 meters. The maximum foam supply height can reach over 500 meters, and the foam supply flow rate is large, which can meet the use of foam monitors and sprinkler systems, solving the problem of existing low-pressure compressed air foam systems with low effective foam supply height, small flow rate, short range, and inability to meet the fire extinguishing needs of super high-rise buildings over 200 meters and large fires.

[0031] 2. The present invention is based on the "one pump to the top" fire-fighting technique and tactics. It only requires pre-laying high-pressure fire-fighting pipes vertically on the outer walls or pipe shafts of super-high-rise buildings, or temporarily laying high-pressure fire-fighting hoses in the corridors of super-high-rise buildings. This can achieve firefighting in super-high-rise buildings over 200 meters high, as well as large-scale fires such as building facades and curtain wall insulation. It has the significant advantages of simple operation, easy use, safety and reliability, low project cost, and high practical value. It provides an advanced and efficient fire-fighting means to solve the problem of fire fighting in super-high-rise buildings.

[0032] 3. The present invention adopts a combined compressed air foam release device, which can not only timely and effectively extinguish fires with large-flow foam spraying at key locations or areas, but also solves the problems of pressure holding and flow limiting in the prior art, which lead to large amounts of liquid deposition in the foam, increased pressure in the pipeline, reduced flow, and serious impact on stable foam supply. It has the remarkable characteristics of fast response speed, stable foam supply, and strong fire extinguishing ability, and has the full advantage of extinguishing fires on the exterior walls of super-high-rise buildings.

[0033] 4. The present invention has a self-adaptive foam flow adjustment function and a variety of fire extinguishing application modes. It is suitable for small-flow fire hydrant box systems that spray foam through foam guns, and is also suitable for large-flow foam cannons or sprinkler systems. It meets the needs of fighting fires of different sizes in super-high-rise buildings, especially the needs of fighting fires on large facades of super-high-rise buildings, or can establish foam barriers in key locations in the building to prevent the fire from expanding and spreading.

[0034] 5. The present invention has the advantages of simple operation, safety and reliability, high fire extinguishing efficiency, and strong thermal insulation protection capability. It can be used as a fixed fire extinguishing system or a semi-fixed fire extinguishing system for super high-rise buildings. It can be used in newly built super high-rise buildings as well as in existing super high-rise buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 This is a schematic structural diagram of a high-pressure compressed air foam fire extinguishing system for super high-rise buildings according to Example 1 of the present invention;

[0037] Figure 2 2. It is a schematic structural diagram of a high-pressure compressed air foam generating device according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic structural diagram of a compressed air foam bolt box according to an embodiment of the present invention;

[0039] Figure 4 Schematic diagram of the structure of a high-pressure compressed air foam fire extinguishing system for super high-rise buildings according to embodiment 2 of the present invention;

[0040] Figure 5 This is a schematic diagram of the installation and spraying of a super high-rise building exterior wall sprinkler release device of a super high-rise building high-pressure compressed air foam fire extinguishing system according to Example 2 of the present invention.

[0041] in:

[0042] 1 High-pressure compressed air foam generating device, 1A Fixed high-pressure compressed air foam generating device, 1B Mobile compressed air foam generating fire truck, 1-1 Fire water tank, 1-2 Water supply valve, 1-3 Water replenishment valve, 1-4 Medium and low-pressure fire pumps, 1-5 Foam liquid tank, 1-6 Replenishment valve, 1-7 Liquid supply valve, 1-8 High-pressure foam liquid pump, 1-9 Foam liquid flow meter, 1-10 Pressure relief valve, 1-11 Foam mixed liquid flow meter, 1-12 Liquid regulating valve, 1-13 Central controller, 1-14 Medium and high-pressure air compressor, 1-15 High-pressure buffer gas tank, 1-16 One-way valve, 1-17 High-pressure gas flow meter, 1-18 High-pressure gas flow regulating valve, 1-19 Gas-liquid mixer, 1-20 Foam output port , 2 high-pressure fire riser, 3 partition valve, 4 foam flow distribution valve, 5 combined compressed air foam release device, 5-1 compressed air foam hydrant box, 5-1-1 box body, 5-1-2 movable hinged joint, 5-1-3 foam branch pipe, 5-1-4 fire hose reel, 5-1-5 opening and closing valve, 5-1-6 fire hose, 5-1-7 compressed air foam gun, 5-2 compressed air foam electric-controlled intelligent cannon, 5-3 compressed air foam spraying device, 5-3-1 compressed air foam spraying hole or nozzle, 6 high-pressure water pump connector, 7 unloading valve, 8 fire water tank, 9 sewage well, 10 high-pressure fire hose, 11 water supply pipe / fire hose, 12 foam layer, 13 super high-rise building exterior wall, 13-1 top parapet. DETAILED DESCRIPTION

[0043] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0044] Example 1:

[0045] In this embodiment 1, Figure 1 As shown, the high-pressure compressed air foam generating device 1 adopts a fixed high-pressure compressed air foam generating device 1A, which is installed on the first floor of a super high-rise building or in a fire-fighting equipment room, and is connected to a high-pressure fire-fighting riser 2 through a high-pressure fire-fighting pipe. The fixed high-pressure compressed air foam generating device 1A is replenished with water from a fire-fighting water tank 8 through a fixed water supply pipe / fire-fighting hose 11; the high-pressure fire-fighting riser 2 is installed on the outer wall of the super high-rise building or in the front room of the evacuation stairwell or in the pipe shaft, and the super high-rise building is divided into several fire-fighting zones by a zone valve 3. The zone valve 3 is installed at the top of each fire-fighting zone. Each fire-fighting zone includes several floors, and a set of combined compressed air foam releasing devices 5 is installed in each floor. In this embodiment, the combined compressed air foam releasing device 5 includes a compressed air foam hydrant box 5-1 and a compressed air foam electrically controlled intelligent cannon 5-2, wherein the rooftop fire-fighting zone can also be equipped with only the compressed air foam electrically controlled intelligent cannon 5-2, and the compressed air foam hydrant box 5-1 and the compressed air foam electrically controlled intelligent cannon 5-2 are connected to the high-pressure fire-fighting riser 2 through a fire-fighting pipe and a foam flow distribution valve 4. A system controller is set up in the fire control center of the super high-rise building. The system controller can remotely connect and control the opening and closing of each partition valve 3 and the opening and closing and opening degree of each foam flow distribution valve 4. A discharge valve 7 is set at the bottom of the high-pressure fire riser 2, and the overpressure foam or residual liquid in the pipeline is discharged to the sewage well 9 through the discharge valve 7.

[0046] like Figure 2 As shown, in the fixed high-pressure compressed air foam generating device 1A, a fire water tank 1-1 and a water supply pipeline provided with a water supply valve 1-2 are included. The fire water tank 1-1 is replenished with water through a water replenishment valve 1-3;

[0047] The foam liquid tank 1-5 is provided with a foam liquid pipeline having a liquid supply valve 1-7, a high-pressure foam liquid pump 1-8, and a foam liquid flow meter 1-9 in sequence. The foam liquid tank 1-5 is replenished with liquid through a liquid replenishment valve 1-6. The foam liquid pipeline is connected to the water supply pipeline to form a foam mixed liquid pipeline. The foam mixed liquid pipeline passes through a medium- and low-pressure fire pump 1-4, a foam mixed liquid flow meter 1-11, and a liquid regulating valve 1-12 in sequence and is connected to a gas-liquid mixer 1-19. A pressure relief valve 1-10 is provided between the medium- and low-pressure fire pump 1-4 and the foam mixed liquid flow meter 1-11.

[0048] It also includes a medium- and high-pressure air compressor 1-14 and a high-pressure gas supply pipeline equipped with a high-pressure buffer gas tank 1-15, a one-way valve 1-16, a high-pressure gas flow meter 1-17, and a high-pressure gas flow regulating valve 1-18 in sequence, and the high-pressure gas supply pipeline is connected to the gas-liquid mixer 1-19;

[0049] The gas-liquid mixer 1-19 performs gas-liquid mixing and is connected to the foam output port 1-20, and is connected to the high-pressure fire standpipe 2 through the foam output port 1-20, providing high-pressure compressed air foam to the high-pressure fire standpipe 2;

[0050] The fixed high-pressure compressed air foam generating device 1A is further provided with a central controller 1-13, such as Figure 2 As shown, the central controller 1-13 is connected to and controls the high-pressure foam liquid pump 1-8 and foam liquid flowmeter 1-9 of the foam liquid pipeline, the foam mixed liquid flowmeter 1-11 and liquid regulating valve 1-12 of the foam mixed liquid pipeline, and the high-pressure gas flowmeter 1-17 and high-pressure gas flow regulating valve 1-18 of the high-pressure gas supply pipeline. It automatically adjusts the flow rate to the set flow rate according to the back pressure of the foam output pipeline, and ensures the stability of the foam flow input to the high-pressure fire riser through adaptive control.

[0051] The central controller 1-13 also has a function of gradually increasing the gas-liquid ratio with the bubble supply time. The gas-liquid ratio increases by 0.01-2.0 per minute. This function can be activated when the bubble supply height exceeds 200m to promote the foaming and upward transportation of the deposited liquid in the high-pressure fire riser by increasing the gas supply, thereby solving the problem of continuous deposition of liquid in the high-pressure fire riser, increased pressure, and impact on effective bubble supply.

[0052] In this embodiment, the flow rates of the compressed air foam hydrant box 5-1 and the compressed air foam electrically controlled smart cannon 5-2 are automatically preset by the foam flow distribution valve 4 and can be adjusted manually or electrically; an opening and closing valve and a compressed air foam gun are provided in the compressed air foam hydrant box 5-1 and are operated and used by professional firefighters; the compressed air foam electrically controlled smart cannon 5-2 is preset to spray directly at key fire-fighting areas or reserved areas in super high-rise buildings.

[0053] The compressed air foam plug box 5-1 is as follows Figure 3As shown, a set of compressed air foam plugs is installed in the box 5-1-1. The compressed air foam plug includes a movable hinge joint 5-1-2, a foam branch pipe 5-1-3, a fire hose reel 5-1-4, an on-off valve 5-1-5, a fire hose 5-1-6, and a compressed air foam gun 5-1-7. The fire hose reel 5-1-4 is fixed in the box 5-1-1 through the movable hinge joint 5-1-2. The fire hose reel 5-1-4 is provided with a fire hose 5-1-6. One end of the fire hose 5-1-6 is connected to the foam gun 5-1-7. The other end of the fire hose 5-1-6 is connected to the outlet of the foam branch pipe 5-1-3 fixed to the box 5-1-1 through the on-off valve 5-1-5. The inlet of the foam branch pipe 5-1-3 extends out of the box 5-1-1 and communicates with the high-pressure fire standpipe 2.

[0054] The compressed air foam hydrant box 5-1 can also be in the form of an ordinary high-pressure fire hose to increase the foam supply distance.

[0055] The foam flow distribution valve 4 uses a Q945F-DN100 electric ball valve, or a valve with similar functions. Upon receiving a fire alarm signal, it can quickly open to a preset position I (valve fully open) to exhaust air from the compressed air foam electronically controlled intelligent cannon. When firefighters are not using the compressed air foam hydrant box 5-1, the gas and foam in the pipeline can be promptly ejected and released from the compressed air foam electronically controlled intelligent cannon 5-2, thereby minimizing the phenomenon of liquid deposition and flow reduction in the foam caused by pressure buildup or flow restriction. When firefighters are using the compressed air foam hydrant box 5-1, the foam flow distribution valve 4 can be remotely or on-site adjusted to a preset position II (opening degree 5%-80%). By adjusting the flow diameter ratio of the compressed air foam hydrant box and the compressed air foam electronically controlled intelligent cannon, the foam flow of the two is automatically controlled and distributed. At the same time, the valve opening can be automatically or manually adjusted to adjust the actual pressure and flow of the foam gun in real time.

[0056] The partition valve 3 adopts an electric signal control valve, such as an electric control ball valve or a butterfly valve.

[0057] The medium and low pressure fire pumps 1-4 are fire centrifugal pumps or variable frequency water pumps, and the water outlet pressure is 0.6MPa-3.0MPa.

[0058] The high-pressure foam liquid pump 1-8 adopts a gear pump, a diaphragm pump, a plunger pump or a metering pump, and the foam liquid pressure is 0.4-3.0 MPa.

[0059] The medium and high pressure air compressor 1-14 is a screw air compressor or a vane air compressor, and the air supply pressure range is 0.6MPa-3.0MPa.

[0060] The liquid regulating valve 1-12 adopts an electric metering control valve, such as a 381LSA electric metering control valve.

[0061] The high-pressure gas flow regulating valve 1-18 adopts an electric metering control valve, such as a 381LSB type electric metering control valve.

[0062] The foam mixture flow meter 1-11 adopts a liquid turbine flow meter or an electromagnetic flow meter or a vortex flow meter.

[0063] The high-pressure gas flow meter 1-17 adopts a vortex flow meter or a turbine flow meter.

[0064] The system controller adopts a mature PLC control technology in the industry, such as a CP1H type PLC of Omron Company.

[0065] The method for extinguishing fire application of the super high-rise building high-pressure compressed air foam fire extinguishing system proposed in the embodiment includes:

[0066] (1) Normal standby: Under normal circumstances, each sub-zone valve is in a normally open state, and the combined compressed air foam release device 5 is in a standby state;

[0067] (2) System start: When a fire occurs in a super high-rise building, the fixed compressed air foam generating device 1A is manually or automatically started by the on-site personnel to supply foam to the high-pressure fire riser 2, and the compressed air foam electric control intelligent cannon 5-2 located on the roof starts to exhaust; After the system controller receives the specific floor fire alarm signal, the foam flow distribution valve 4 of the corresponding floor is immediately and quickly opened to the preset position I (valve fully open), and the compressed air foam electric control intelligent cannon 5-2 starts to exhaust, to ensure that when the compressed air foam plug box 5-1 is not used by the fire personnel, the gas and foam in the pipeline can be timely injected and released from the compressed air foam electric control intelligent cannon 5-2, thereby minimizing the phenomenon of foam liquid deposition and flow reduction caused by pressure build-up or flow limitation. At the same time, the sub-zone valve 3 of the fire extinguishing sub-zone corresponding to the fire floor is quickly closed to shorten the foam delivery response time and maximize the foam discharge speed;

[0068] (3) Stable foam supply: When the fire is located on a lower floor, the fixed compressed air foam generating device 1A stably outputs foam to the high-pressure fire riser according to the set flow rate and gas-liquid ratio, and then transports it to the combined compressed air foam releasing device 5 for spraying; when the fire is located on a higher floor, the central controller 1-13 in the fixed compressed air foam generating device 1A automatically adjusts the flow rate and gas-liquid ratio to the set value by adjusting the valve opening and the speed of the foam pump according to the back pressure of the foam output pipeline, and maintains a continuous and stable output of high-quality foam to the high-pressure fire riser 2 according to the set parameters, and after overcoming the high back pressure over a long vertical distance, it is transported to the combined compressed air foam releasing device 5 for spraying. The flow rate and gas-liquid ratio of the high-pressure compressed air foam generating device are adaptively controlled to ensure stable foam supply to the high-pressure fire riser. At the same time, the central controller 1-13 runs the gas-liquid ratio increasing program, which can be activated when the bubble supply height exceeds 200m. The gas-liquid ratio is controlled to gradually increase with the bubble supply time. The gas-liquid ratio increment per minute is 0.01-2.0. By increasing the air supply, the accumulated liquid in the high-pressure fire riser is foamed and transported upward, minimizing liquid deposition in the high-pressure fire riser and significantly improving the continuous and stable foam supply on high floors. This solves the problem of continuous liquid deposition and pressure increase in the high-pressure fire riser, which affects the effective foam supply.

[0069] (4) Foaming fire extinguishing. When the compressed air foam electronically controlled intelligent cannon 5-2 is able to spray and cover the fire source, the compressed air foam electronically controlled intelligent cannon 5-2 is remotely or on-sitely controlled to spray and extinguish the fire in a timely and effective manner; when the compressed air foam electronically controlled intelligent cannon 5-2 is unable to spray and cover the fire source, the firefighters use the compressed air foam gun 5-1-7 of the compressed air foam hydrant box 5-1 to extinguish the fire. The firefighters first open the opening and closing valve 5-1-5 of the compressed air foam hydrant box 5-1, and then adjust the foam flow distribution valve 4 to the preset position II (opening degree 5%-80%) remotely or on-site. By adjusting the flow path ratio of the compressed air foam hydrant box 5-1 and the compressed air foam electronically controlled intelligent cannon 5-2, the foam flow of the two is automatically controlled and distributed. At the same time, the actual pressure and flow of the compressed air foam hydrant box foam gun can be adjusted in real time by automatically or manually adjusting the valve opening.

[0070] Example 2:

[0071] In Example 2, Figure 4 As shown, the high-pressure compressed air foam generating device 1 adopts a mobile compressed air foam generating fire truck 1B. The mobile compressed air foam generating fire truck 1B is parked on the road near the building, and is connected to the high-pressure fire riser 2 through a high-pressure fire hose 10 and a high-pressure water pump connector 6, and is replenished with water through a water supply pipe / fire hose 11.

[0072] In this embodiment, the arrangement of the high-pressure fire riser 2 is the same as that of embodiment 1, and the combined compressed air foam release device 5 arranged on each floor is also the same as that of embodiment 1, except that the compressed air foam spray device 5-3 is arranged in the roof fire extinguishing zone. The compressed air foam spray device 5-3 is mainly used to protect certain areas, such as Figure 5 As shown, the compressed air foam spray device 5-3 is specifically arranged on the top parapet 13-1 of the outer wall 13 of the super high-rise building, and uses the compressed air foam spray hole or nozzle 5-3-1 to spray foam directly on the outer wall of the building to form a foam layer 12, which is specially protected against fire on the outer wall of the building.

[0073] like Figure 5 As shown,

[0074] In the mobile compressed air foam generating fire truck 1B, the structure of high-pressure compressed air foam generating is the same as that in Example 1.

[0075] In this embodiment 2, the specific application method is basically similar to that of embodiment 1, and is as follows:

[0076] (1) Normal standby: Under normal circumstances, each partition valve is in a normally open state, and the combined compressed air foam release device 5 is in a standby state;

[0077] (2) System startup: When a fire occurs in a super high-rise building, the on-site personnel manually or automatically start the fixed compressed air foam generating device 1A to supply foam to the high-pressure fire riser 2, and start exhausting from the compressed air foam spraying device 5-3 located on the roof; after the system controller receives the fire alarm signal of a specific floor, it immediately opens the foam flow distribution valve 4 of the corresponding floor to the preset position I (valve fully open), and starts exhausting from the compressed air foam electronically controlled intelligent cannon 5-2, ensuring that when the firefighters do not use the compressed air foam bolt box 5-1, the gas and foam in the pipeline can be sprayed and released from the compressed air foam electronically controlled intelligent cannon 5-2 in time, thereby minimizing the liquid deposition and flow reduction in the foam caused by pressure holding or flow limiting. At the same time, quickly close the partition valve 3 of the fire extinguishing partition corresponding to the fire floor to shorten the foam delivery response time and maximize the foaming speed;

[0078] (3) Stable foam supply: When the fire is located on a lower floor, the fixed compressed air foam generating device 1A stably outputs foam to the high-pressure fire riser according to the set flow rate and gas-liquid ratio, and then transports it to the combined compressed air foam releasing device 5 for spraying; when the fire is located on a higher floor, the central controller 1-13 in the fixed compressed air foam generating device 1A automatically adjusts the flow rate and gas-liquid ratio to the set value by adjusting the valve opening and the speed of the foam pump according to the back pressure of the foam output pipeline, and maintains a continuous and stable output of high-quality foam to the high-pressure fire riser 2 according to the set parameters, and after overcoming the high back pressure over a long vertical distance, it is transported to the combined compressed air foam releasing device 5 for spraying. The flow rate and gas-liquid ratio of the high-pressure compressed air foam generating device are adaptively controlled to ensure stable foam supply to the high-pressure fire riser. At the same time, the central controller 1-13 runs the gas-liquid ratio increasing program, which can be activated when the bubble supply height exceeds 200m. The gas-liquid ratio is controlled to gradually increase with the bubble supply time. The gas-liquid ratio increment per minute is 0.01-2.0. By increasing the air supply, the accumulated liquid in the high-pressure fire riser is foamed and transported upward, minimizing liquid deposition in the high-pressure fire riser and significantly improving the continuous and stable foam supply on high floors. This solves the problem of continuous liquid deposition and pressure increase in the high-pressure fire riser, which affects the effective foam supply.

[0079] (4) Foaming fire extinguishing. When the compressed air foam electronically controlled intelligent cannon 5-2 is able to spray and cover the fire source, the compressed air foam electronically controlled intelligent cannon 5-2 is remotely or on-sitely controlled to spray and extinguish the fire in a timely and effective manner; when the compressed air foam electronically controlled intelligent cannon 5-2 is unable to spray and cover the fire source, the firefighters use the compressed air foam gun 5-1-7 of the compressed air foam hydrant box 5-1 to extinguish the fire. The firefighters first open the opening and closing valve 5-1-5 of the compressed air foam hydrant box 5-1, and then adjust the foam flow distribution valve 4 to the preset position II (opening degree 5%-80%) remotely or on-site. By adjusting the flow path ratio of the compressed air foam hydrant box 5-1 and the compressed air foam electronically controlled intelligent cannon 5-2, the foam flow of the two is automatically controlled and distributed. At the same time, the actual pressure and flow of the compressed air foam hydrant box foam gun can be adjusted in real time by automatically or manually adjusting the valve opening.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fire extinguishing application method of a high-pressure compressed air foam fire extinguishing system for super high-rise buildings, characterized by: The high-pressure compressed air foam fire extinguishing system for super high-rise buildings comprises: a high-pressure compressed air foam generating device (1), a high-pressure fire riser (2), a partition valve (3), a foam flow distribution valve (4), a combined compressed air foam releasing device (5), and a system controller; The high-pressure compressed air foam generating device (1) adopts a fixed compressed air foam generating module (1A) which is installed on the first floor of a super high-rise building or in a fire-fighting equipment room; or adopts a mobile compressed air foam generating fire truck (1B) which is parked on a road near the building; the high-pressure compressed air foam generating device (1) is connected to a high-pressure fire-fighting riser (2) via a high-pressure fire-fighting pipe or a high-pressure fire-fighting hose or a high-pressure water pump connector; the high-pressure compressed air foam generating device (1) is provided with a central controller (1-13), and the central controller ( 1-13) lines connect and control the high-pressure foam liquid pump (1-8) and foam liquid flow meter (1-9) of the foam liquid pipeline, the foam mixed liquid flow meter (1-11) and liquid regulating valve (1-12) of the foam mixed liquid pipeline, and the high-pressure gas flow meter (1-17) and high-pressure gas flow regulating valve (1-18) of the high-pressure gas supply pipeline; when the foam supply height exceeds 200m, the central controller (1-13) starts the function of gradually increasing the gas-liquid ratio with the foam supply time, and the gas-liquid ratio increases by 0.01-2.0 per minute; The high-pressure fire-fighting riser (2) is vertically installed on the outer wall of a super-high-rise building or inside a super-high-rise building, and is divided into a plurality of fire-fighting zones by setting a zone valve (3), and each zone valve (3) is set at the top of the fire-fighting zone; Each fire extinguishing zone includes several floors, and each floor is provided with a set of combined compressed air foam release devices (5), the combined compressed air foam release devices (5) being connected to the high-pressure fire riser (2) via a fire pipe and a foam flow distribution valve (4); the combined compressed air foam release devices are a combination of a compressed air foam hydrant box (5-1) and a compressed air foam electric-controlled intelligent cannon (5-2) or a compressed air foam spray device (5-3); the flow rates of the compressed air foam hydrant box (5-1) and the compressed air foam electric-controlled intelligent cannon (5-2) are automatically preset by the foam flow distribution valve (4) and are regulated manually or electrically; The system controller is arranged in the fire control center of the super high-rise building, and remotely controls the opening and closing of each partition valve (3) and the opening and closing and opening degree of the foam flow distribution valve (4); The fire extinguishing application method comprises: S1, normal standby: Under normal circumstances, each partition valve (3) is in a normally open state, and the combined compressed air foam release device (5) is in a standby state; S2. System startup: When a fire occurs in a super high-rise building, on-site personnel start the high-pressure compressed air foam generating device (1) to supply foam to the high-pressure fire riser (2), and start exhausting from the compressed air foam electronically controlled intelligent cannon (5-2) or the compressed air foam spraying device (5-3) in the combined compressed air foam releasing device (5) located in the fire extinguishing partition on the roof; after the system controller receives the fire alarm signal of a specific floor, it opens the foam flow distribution valve (4) of the corresponding floor to the preset position I, the valve is fully opened, and starts exhausting from the compressed air foam electronically controlled intelligent cannon (5-2) in the combined compressed air foam releasing device (5), and at the same time quickly closes the partition valve (3) of the fire extinguishing partition corresponding to the fire floor; S3. Stable foam supply: When the fire is located on a lower floor, the high-pressure compressed air foam generating device (1) stably outputs foam to the high-pressure fire fighting riser (2) according to the set flow rate and gas-liquid ratio, and then delivers it to the combined compressed air foam releasing device (5) for spraying; when the fire is located on a higher floor, the high-pressure compressed air foam generating device (1) automatically adjusts the flow rate and gas-liquid ratio to the set value by adjusting the valve opening and the speed of the foam pump according to the back pressure of the foam output pipeline through the central controller (1-13), and maintains the continuous and stable output of high-quality foam to the high-pressure fire fighting riser (2) according to the set parameters, and after overcoming the high back pressure over a long vertical distance, it is delivered to the combined compressed air foam releasing device (5) for spraying; the gas-liquid ratio of the foam is controlled by the central controller (1-13) to gradually increase with the foam supply time; S4. Foam extinguishing: When the compressed air foam electric-controlled intelligent cannon (5-2) sprays and covers the fire source, the compressed air foam electric-controlled intelligent cannon (5-2) is remotely or on-sitely controlled to spray and extinguish the fire; when the compressed air foam electric-controlled intelligent cannon (5-2) cannot spray and cover the fire source, the foam gun of the compressed air foam plug box (5-1) in the combined compressed air foam release device (5) is used to extinguish the fire. First, the opening and closing valve (5-1-5) of the compressed air foam plug box (5-1) is opened, and then the foam flow distribution valve (4) is adjusted to the preset position II by remote or on-site, with an opening of 5%-80%. By adjusting the flow diameter ratio of the compressed air foam plug box (5-1) and the compressed air foam electric-controlled intelligent cannon (5-2), the foam flow of the two is automatically controlled and distributed. At the same time, the actual pressure and flow of the foam gun of the compressed air foam plug box (5-1) can be adjusted in real time by automatically or manually adjusting the valve opening.

2. The fire extinguishing application method of the high-pressure compressed air foam fire extinguishing system for super high-rise buildings according to claim 1 is characterized by: The high-pressure compressed air foam generating device comprises a fire water tank (1-1) and a water supply pipeline provided with a water supply valve (1-2); It also includes a foam liquid tank (1-5) and a foam liquid pipeline provided with a liquid supply valve (1-7), a high-pressure foam liquid pump (1-8), and a foam liquid flow meter (1-9) in sequence; the foam liquid pipeline is connected to the water supply pipeline to form a foam mixed liquid pipeline, and is connected to a gas-liquid mixer (1-19) through a medium- and low-pressure fire pump (1-4), a foam mixed liquid flow meter (1-11), and a liquid regulating valve (1-12) in sequence. It also includes a medium- and high-pressure air compressor (1-14) and a high-pressure gas supply pipeline provided with a high-pressure buffer gas tank (1-15), a one-way valve (1-16), a high-pressure gas flow meter (1-17), and a high-pressure gas flow regulating valve (1-18) in sequence, wherein the high-pressure gas supply pipeline is connected to the gas-liquid mixer (1-19); The gas-liquid mixer (1-19) performs gas-liquid mixing and is connected to the foam output port (1-20), and is communicated with the high-pressure fire fighting riser (2) through the foam output port (1-20), thereby providing high-pressure compressed air foam to the high-pressure fire fighting riser (2); The central controller (1-13) is connected to and controls the high-pressure foam liquid pump (1-8) and foam liquid flow meter (1-9) of the foam liquid pipeline, the foam mixed liquid flow meter (1-11) and liquid regulating valve (1-12) of the foam mixed liquid pipeline, and the high-pressure gas flow meter (1-17) and high-pressure gas flow regulating valve (1-18) of the high-pressure gas supply pipeline. The central controller automatically adjusts the flow rate to the set flow rate according to the back pressure of each pipeline, and ensures the stability of the foam flow input to the high-pressure fire fighting riser through adaptive control.

3. The fire extinguishing application method of the high-pressure compressed air foam fire extinguishing system for super high-rise buildings according to claim 1 is characterized by: The compressed air foam hydrant box (5-1) comprises a box body (5-1-1) and a set of compressed air foam hydrants installed in the box body (5-1-1), wherein the compressed air foam hydrant comprises a movable hinge joint (5-1-2), a foam branch pipe (5-1-3), a fire hose reel (5-1-4), an opening and closing valve (5-1-5), a fire hose (5-1-6), and a compressed air foam gun (5-1-7); the fire hose reel (5-1-4) is connected to the compressed air foam hydrant through a movable hinge joint. (5-1-2) is fixed in the box (5-1-1), and a fire hose (5-1-6) is provided on the fire hose reel (5-1-4); one end of the fire hose (5-1-6) is connected to the foam gun (5-1-7), and the other end is connected to the outlet of the foam branch pipe (5-1-3) fixed on the box (5-1-1) through the opening and closing valve (5-1-5), and the inlet of the foam branch pipe (5-1-3) extends out of the box (5-1-1) and is connected to the high-pressure fire riser (2).

4. The fire extinguishing application method of the high-pressure compressed air foam fire extinguishing system for super high-rise buildings according to claim 1 is characterized by: A discharge valve (7) is provided at the bottom of the high-pressure fire-fighting riser, and the overpressure foam or residual liquid in the pipeline is discharged to the sewage well (9) through the discharge valve (7).

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