CN117731996A

CN117731996A - Intelligent efficient compressed air foam fire extinguishing system and method

Info

Publication number: CN117731996A
Application number: CN202311750734.7A
Authority: CN
Inventors: 徐斌; 吴刘锁; 张国良; 李广军; 张建成; 罗建飞; 景伟
Original assignee: Nari Technology Co Ltd
Current assignee: Nari Technology Co Ltd
Priority date: 2023-12-19
Filing date: 2023-12-19
Publication date: 2024-03-22

Abstract

The invention discloses an intelligent efficient compressed air foam fire extinguishing system and method, and relates to the technical field of substation fire extinguishment. Wherein the fire suppression system comprises: foam supply device, water supply device, air supply device and mixing arrangement, fire extinguishing system still includes: the device comprises a voltage stabilizing device, a partition selection valve and a control device; the foam supply device is connected with the mixing device through a foam conveying pipeline, the water supply device and the pressure stabilizing device are connected with the mixing device through a water conveying pipeline, the air supply device is connected with the mixing device through an air conveying pipeline, the mixing device is connected with the partition selection valve through a fire main pipeline, and the pressure water is pre-stored in the fire main pipeline; the partition selection valve is connected with the spraying device through a fire branch pipeline; the control device is electrically connected with the foam supply device, the water supply device, the pressure stabilizing device, the air supply device and the partition selection valve. The invention can improve the response speed and the intelligent degree of the fire extinguishing system and can adaptively adjust parameters according to different application scenes.

Description

Intelligent efficient compressed air foam fire extinguishing system and method

Technical Field

The invention relates to the technical field of substation fire extinguishment, in particular to an intelligent efficient compressed air foam fire extinguishing system.

Background

Large-scale oil-filled equipment such as transformers is large in oil storage capacity, high in fire risk and long in combustion duration, and the conventional fixed fire extinguishing systems such as water spray and SP synthetic foam are insufficient in fire extinguishing capability and cannot effectively and continuously control and extinguish oil fires. The compressed air foam fire extinguishing technology introduces compressed air into the foam mixed liquid, forms foam with uniform granularity and difficult breaking after mixing, adheres to the surface of a combustion object to form coverage after releasing, has the advantages of uniform and fine foam mixing, long liquid separation time, high fire extinguishing efficiency and strong antiknock and high-temperature resistance, and is continuously popularized and applied in the field of electric fire control.

In the prior art, in the compressed air foam fire extinguishing system, a main fire extinguishing pipeline between an outlet of a mixing device and a partition selection valve near a transformer is kept in a hollow pipe state, and once a fire condition occurs, a long-distance conveying pipeline (40-400 m) is filled with foam mixed liquid, so that fire extinguishing medium can be sprayed through a release device, and the process generally needs 1 minute under the consideration of the most unfavorable point working condition; in addition, the fire extinguishing system is in a shutdown state for a long time, key equipment such as a pump set, an air compressor, an electric valve and the like can not work under pressure for a long time, state monitoring can not be carried out, and fault hidden danger can exist on parts; in addition, the fire extinguishing system cannot be adaptively adjusted according to actual application conditions, and is influenced by factors such as arrangement of engineering field devices, pipeline laying and the like, and performance parameters such as system flow, mixing ratio and the like can not meet the use requirements. In summary, the currently used compressed air foam fire extinguishing system has low response speed and low intelligent degree, and cannot be adaptively adjusted according to different application scenes.

Prior art document 1 (grant publication No. CN 217745470U) discloses a fire extinguishing system of a hybrid cascading technique extra-high voltage converter station, comprising a compressed air foam generating device, an air compressor connected with the compressed air foam generating device respectively, a foam liquid tank connected with the compressed air foam generating device, a water tank connected outside the compressed air foam generating device, and a pair of fire water pumps connected between the water tank and the compressed air generating device; the spraying system is connected with the periphery of the compressed air foam generating device through a compressed air foam main pipe and extends to the area to be extinguished; the fire monitor system and the spraying system are connected in parallel to the end part of the compressed air foam main pipe; the test pipeline is connected with the compressed air foam main pipe. The paired compressed air foam generating systems are mutually standby, and respectively provide compressed air foam for the converter transformer, so that the fire extinguishing response speed is improved. However, the prior art document 1 has the disadvantages that: the main fire-fighting pipeline of the fire-extinguishing system is an empty pipe, and the fire-extinguishing medium needs to be filled with a long-distance conveying pipeline after a fire occurs, so that the difficult problem of slow response time can not be fundamentally solved.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the intelligent efficient compressed air foam fire extinguishing system and the intelligent efficient compressed air foam fire extinguishing method, which can improve the response speed and the intelligent degree of the fire extinguishing system and can adaptively adjust parameters according to different application scenes.

The invention adopts the following technical scheme.

In a first aspect, the present invention provides a fast-responding intelligent high-efficiency compressed air foam fire extinguishing system, which comprises a foam supply device, a water supply device, a gas supply device and a mixing device, and further comprises: the device comprises a voltage stabilizing device, a partition selection valve and a control device; the foam supply device is connected with the mixing device through a foam conveying pipeline, the water supply device and the pressure stabilizing device are connected with the mixing device through a water conveying pipeline, the air supply device is connected with the mixing device through an air conveying pipeline, the mixing device is connected with the partition selection valve through a fire main pipeline, and the pressure water supplied by the pressure stabilizing device is prestored in the fire main pipeline; the partition selection valve is connected with the spraying device through a fire branch pipeline; the control device is electrically connected with the foam supply device, the water supply device, the pressure stabilizing device, the air supply device and the partition selection valve.

Preferably, the foam supply device comprises a foam liquid tank, a first electric valve, a first manual butterfly valve, a foam liquid pump, a first one-way valve, a first pressure sensor, a first electric regulating valve and a first flowmeter which are connected in sequence.

Preferably, the foam supply device is provided with two groups of foam conveying pipelines connected in parallel between the first manual valve and the first pressure sensor, and each group of foam conveying pipelines comprises a first manual butterfly valve, a foam liquid pump and a first one-way valve which are sequentially connected.

Preferably, a first return pipeline is arranged between the foam liquid tank and the foam liquid pump, and a first pressure-holding relief valve is arranged on the first return pipeline and used for periodically inspecting or relieving pressure of the foam supplying device.

Preferably, the water supply device comprises a fire-fighting water tank, a second manual butterfly valve, a fire-fighting water pump, a second one-way valve, a second pressure sensor, a second electric regulating valve and a second flowmeter which are sequentially connected.

Preferably, the water supply device is provided with two groups of fire water conveying pipelines connected in parallel between the fire water tank and the second pressure sensor, and each group of fire water conveying pipelines comprises a second manual butterfly valve, a fire water pump and a second one-way valve which are sequentially connected.

Preferably, a second return pipeline is arranged between the fire-fighting water tank and the fire-fighting water pump, and a second pressure-holding relief valve is arranged on the second return pipeline and used for periodically inspecting or relieving pressure of the water supply device.

Preferably, the pressure stabilizing device comprises a fire-fighting water tank, a second electric valve, a third manual butterfly valve, a pressure stabilizing pump, a third one-way valve and a third pressure sensor which are sequentially connected.

Preferably, the pressure stabilizing device is provided with two groups of parallel pressure stabilizing pipelines between the second manual valve and the water conveying pipeline, and each group of pressure stabilizing pipelines comprises a third manual butterfly valve, a pressure stabilizing pump and a third one-way valve which are sequentially connected.

Preferably, the pressure stabilizing device is further provided with a diaphragm air pressure tank and a fourth manual butterfly valve; the fourth manual butterfly valve is connected with the diaphragm air pressure tank and then connected with the third one-way valve; the fourth manual butterfly valve is also connected with a water delivery pipeline, and a third pressure sensor is arranged on the connecting pipeline of the fourth manual butterfly valve and the water delivery pipeline.

Preferably, the air supply device comprises an air compressor, a fourth pressure sensor, a third flowmeter, a third electric valve and a fourth one-way valve which are sequentially connected.

Preferably, the air supply device 4 comprises two air compressors 37 connected in parallel, and the two air compressors 37 are connected in parallel and then connected with an air storage tank 38

Preferably, the air supply device is further provided with an air storage tank, and the air storage tank is arranged between the air compressor and the fourth pressure sensor.

Preferably, the mixing device comprises a foam mixer and a gas-liquid mixer; the foam mixer is connected with the gas-liquid mixer, and the foam conveying pipeline and the water conveying pipeline are both connected with the foam mixer, and the gas conveying pipeline is connected with the gas-liquid mixer.

In a second aspect, the invention provides an intelligent efficient compressed air foam fire extinguishing method, which is based on the intelligent efficient compressed air foam fire extinguishing system and comprises the following steps:

opening a partition selection valve through a control device;

after the partition selection valve is opened, the pressure water stored in the main fire-fighting pipeline is conveyed to the branch fire-fighting pipeline;

the pressurized water output from the fire branch is sprayed to extinguish fire through the spraying device.

Preferably, the foam supply device, the water supply device and the air supply device are started through the control device, and the water, the foam and the compressed air three-element gas-liquid two-phase flow are mixed through the mixing device;

and conveying the mixed foam to a spraying device, and spraying the foam to extinguish fire through the spraying device.

Compared with the prior art, the invention has the beneficial effects that the control device and the partition selection valve are arranged, so that the pressurized water stored in the main fire-fighting pipeline can be controlled to be started to enter the branch fire-fighting pipeline quickly, and the fire can be immediately sprayed to extinguish the fire through the spraying device, thereby realizing quick response; simultaneously, the foam supply device, the water supply device and the air supply device are started in a linkage way through the control device, three-element gas-liquid two-phase flow of water, foam and compressed air is conveyed into the mixing device for mixing, uniform and fine foam is generated, and the foam is conveyed to the spraying device for continuous fire extinguishment; in addition, the control device can control the flow required by the output of the foam supply device, the water supply device and the air supply device according to the requirements of on-site fire conditions and supply strength, so that the self-adaptive adjustment of the system flow, the foam mixing ratio, the gas-liquid ratio and other performance parameters of the compressed air foam fire extinguishing system is realized, and the applicability of the system is improved. Furthermore, the compressed air foam fire extinguishing system provided by the invention is provided with the pressure stabilizing device, the fire main pipeline between the outlet of the mixing device and the partition selection valve is filled with pressure water, when the water pressure is lower than the pressure stabilizing lower limit, the pressure stabilizing pump is started to fill water and pressurize the main pipeline, so that the pipeline maintains a certain water pressure, and water can be sprayed to extinguish fire immediately after a fire occurs, thereby realizing quick response.

Furthermore, the air supply device of the compressed air foam fire extinguishing system is provided with the air storage tank and is provided with pressure for a long time, when the pressure of the air storage tank is lower than the set pressure, the air compressor is automatically pressurized, automatic inspection can be realized, meanwhile, the loading time of the air compressor reaching the rated working condition can be reduced by starting the air compressor under pressure, a stable air source is quickly provided, and the response time of the fire extinguishing system is further shortened.

Furthermore, the water supply device and the foam supply device of the compressed air foam fire extinguishing system provided by the invention are provided with the return pipeline and the pressure-holding pressure relief valve, so that the system can be prevented from being overpressured and used for regular inspection, and the state monitoring and fault alarming of key equipment and components can be realized by connecting signals of a pump group, a valve and an instrument on a link into the control device, so that the reliability and the intellectualization of the system are improved.

Furthermore, the compressed air foam fire extinguishing system provided by the invention is based on the automatic control of water, foam and compressed air flow by the electric control valve, the servo motor and the intelligent control device, can perform self-adaptive adjustment according to the supply strength requirements of different application scenes, and has wider applicability.

Drawings

Fig. 1 is a schematic diagram of the operation of the intelligent high-efficiency compressed air foam fire extinguishing system with quick response provided by the invention.

In the figure:

1. a foam supply device; 2. a water supply device; 3. a voltage stabilizing device; 4. a gas supply device; 5. a mixing device; 6. a control device; 7. rotary valves in zones; 8. a spraying device; 9. a fire main pipeline; 10. a fire branch pipe; 11. a foam liquid tank; 12. a first electrically operated valve; 13. a first manual butterfly valve; 14. a foam liquid pump; 15. a first one-way valve; 16. a first pressure sensor; 17. a first electrically operated regulator valve; 18. a first flowmeter; 19. a foam conveying pipeline; 20. a first pressure-holding relief valve; 21. a fire hose; 22. a second manual butterfly valve; 23. fire pump; 24. a second one-way valve; 25. a second pressure sensor; 26. a second electric control valve; 27. a second flowmeter; 28. a water delivery pipeline; 29. a second pressure-holding relief valve; 30. a second electrically operated valve; 31. a third manual butterfly valve; 32. a pressure stabilizing pump; 33. a third one-way valve; 34. a third pressure sensor; 35. a fourth manual butterfly valve; 36. a diaphragm air pressure tank; 37. a fourth manual butterfly valve; 38. a gas storage tank; 39. a fourth pressure sensor; 40. a third flowmeter; 41. a third electrically operated valve; 42. a fourth one-way valve; 44. a foam mixer; 45. a gas-liquid mixer; 46. and a fifth pressure sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described herein are merely some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are within the scope of the present invention.

As shown in fig. 1, embodiment 1 of the present invention provides an intelligent efficient compressed air foam fire extinguishing system, which comprises a foam supply device 1, a water supply device 2, a pressure stabilizing device 3, a gas supply device 4, a mixing device 5, a control device 6, a partition selecting valve 7 and a discharge device 8, wherein the foam supply device 1 is connected with the mixing device 5 through a foam conveying pipeline 19, the water supply device 2 and the pressure stabilizing device 3 are connected with the mixing device 5 through a water conveying pipeline 28, the gas supply device 4 is connected with the mixing device 5 through a gas conveying pipeline 43, the mixing device 5 is connected with the partition selecting valve 7 through a fire main pipeline 9, the pressure water is pre-stored in the fire main pipeline 9, and the partition selecting valve 7 is connected with the discharge device 8 through a fire branch pipeline 10. The control device 6 is electrically connected with the foam supply device 1, the water supply device 2, the pressure stabilizing device 3, the air supply device 4 and the partition selection valve 5.

The pressure water pre-stored in the main fire-fighting pipeline 9 is water with a certain pressure and supplied by the pressure stabilizing device 3 for starting the fire-extinguishing system, the pressure water is pre-stored in the main fire-fighting pipeline 9 in advance, and when a fire is met, the pressure water can be quickly conveyed into the branch fire-fighting pipeline 10 through the control device 6 and the partition selection valve 7, and the fire is immediately sprayed to extinguish the fire through the spraying device 8, so that quick response is realized.

The foam supply device 1 comprises a foam liquid tank 11, a first electric valve 12, a first manual butterfly valve 13, a foam liquid pump 14, a first one-way valve 15, a first pressure sensor 16, a first electric regulating valve 17 and a first flowmeter 18 which are connected in sequence. The foam supply device 1 can output the required foam liquid flow rate by controlling the valve opening of the first electric regulating valve 17.

In a preferred but non-limiting embodiment of the invention, the foam supply device 1 is provided with two groups of foam conveying pipelines connected in parallel between the first manual valve 12 and the first pressure sensor 16, each group of foam conveying pipelines comprises a first manual butterfly valve 13, a foam liquid pump 14 and a first one-way valve 15 which are sequentially connected, and the system reliability is improved by arranging two foam liquid pumps 14 connected in parallel in a standby mode, and automatically switching faults; the two groups of parallel first manual butterfly valves 13 are in a normally open state, so that the foam liquid pump 14 is convenient to overhaul and replace; the two parallel first check valves 15 prevent the foam mixture from flowing back to the foam liquid pump 14 and the foam liquid tank 11.

Further, a first return pipeline is arranged between the foam liquid tank 11 and the foam liquid pump 14, and a first pressure-holding relief valve 20 is arranged on the first return pipeline; the first pressure-holding relief valve 20 can prevent the system from being overpressured in the working state, when the working pressure of the foam liquid pump 14 is higher than the set pressure of the first pressure-holding relief valve 20, the redundant foam liquid flows back to the foam liquid tank 11 through the first pressure-holding relief valve 20, so that the stability of the system is improved; the first pressure-holding relief valve 20 can be used for regular inspection under the non-working condition, at the moment, the first electric valve 12 is opened, the first electric regulating valve 17 is closed, the foam liquid pump 14 is started, the foam liquid flows back to the foam liquid tank 11 after sequentially passing through the first electric valve 12, the first manual butterfly valve 13, the foam liquid pump 14, the first one-way valve 15 and the first pressure-holding relief valve 20, so that the state monitoring and fault alarming of equipment, valves and meters on a link can be realized, and the reliability of the system is improved.

The water supply device 2 comprises a fire water tank 21, a second manual butterfly valve 22, a fire water pump 23, a second one-way valve 24, a second pressure sensor 25, a second electric regulating valve 26 and a second flowmeter 27 which are connected in sequence; the water supply device 2 can output a desired water flow rate by controlling the valve opening of the second electric adjusting valve 26.

In a preferred but non-limiting embodiment of the invention, the water supply device 2 provides two sets of fire water delivery lines in parallel between the fire water tank 21 and the second pressure sensor 25, each set of fire water delivery lines comprising a second manual butterfly valve 22, a fire water pump 23 and a second non-return valve 24 connected in sequence. By arranging two fire water pumps 23 in parallel to be used for one time, the fault is automatically switched, and the reliability of the system is improved; the two groups of parallel second manual butterfly valves 22 are in a normally open state, so that the two groups of parallel second manual butterfly valves are convenient to overhaul and replace the fire pump 23; two parallel second check valves 24 prevent the foam mixture from flowing back to the fire pump 23 and the fire tank 21. Further, a second return pipeline is arranged between the fire water tank 21 and the fire water pump 23, and a second pressure-holding relief valve 29 is arranged on the second return pipeline; the second pressure-holding relief valve 29 can prevent the system from being overpressured in the working state, when the working pressure of the fire-fighting water pump 23 is higher than the set pressure of the second pressure-holding relief valve 29, redundant fire-fighting water flows back to the fire-fighting water tank 21 through the second pressure-holding relief valve 29, so that the stability of the system is improved; the second pressure-holding relief valve 29 can be used for regular inspection under the non-working state, at the moment, the second electric regulating valve 27 is closed, the fire pump 23 is started, the fire water sequentially passes through the second manual butterfly valve 22, the fire pump 23, the second one-way valve 24 and the second pressure-holding relief valve 29 and then flows back to the fire water tank 21, so that the state monitoring and fault alarming of equipment, valves and meters on a link can be realized, and the reliability of the system is improved.

The pressure stabilizing device 3 comprises a fire-fighting water tank 21, a second electric valve 30, a third manual butterfly valve 31, a pressure stabilizing pump 32, a third one-way valve 33 and a third pressure sensor 34 which are connected in sequence.

In a preferred but non-limiting embodiment of the invention, the pressure stabilizing device 3 is provided with two sets of pressure stabilizing lines connected in parallel between the second manual valve 30 and the water duct 28, each set of pressure stabilizing lines comprising a third manual butterfly valve 31, a pressure stabilizing pump 32 and a third one-way valve 33 connected in sequence. By arranging two parallel pressure stabilizing pumps 32 one by one, the fault is automatically switched, and the reliability of the system is improved; the two groups of parallel third manual butterfly valves 31 are in a normally open state, so that the hydraulic pump 32 is convenient to overhaul and replace; two third check valves 33 in parallel prevent the back flow of the foam mixture to the stabilizator pump 32 and the fire hose 21. In a further preferred but non-limiting embodiment of the invention, the pressure stabilizing device 3 is further provided with a diaphragm air pressure tank 36 and a fourth manual butterfly valve 35; the fourth manual butterfly valve 35 is connected with the diaphragm air pressure tank 36 and then connected with the third one-way valve 33; the fourth manual butterfly valve 35 is also connected with the water delivery pipeline 28, and a third pressure sensor 34 is also arranged on the connection pipeline of the fourth manual butterfly valve 35 and the water delivery pipeline 28; when a small amount of leakage occurs in the system pipeline, the diaphragm air pressure tank 36 presses the water in the tank out of the pressure of the maintenance pipe network, when a large amount of leakage occurs in the system pipeline, the third pressure sensor 34 is started when the pressure value is lower than the starting pressure, the pressure stabilizing pump 32 is started, the main fire-fighting pipeline 9 is ensured to maintain the required water supply pressure, and water can be immediately sprayed to extinguish the fire through the spraying device 8 after a fire occurs, so that quick response is realized; the fourth manual butterfly valve 35 is in a normally open state, and is convenient for overhauling and replacing the diaphragm air pressure tank 36.

The air supply device 4 includes an air compressor 37, a fourth pressure sensor 39, a third flowmeter 40, a third electric valve 41, and a fourth check valve 42, which are connected in this order; the air compressor 37 is a screw air compressor, and is started by adopting a servo motor in a variable frequency manner, so that the rotating speed of the air compressor can be accurately controlled to output the required compressed air flow.

In a preferred but non-limiting embodiment of the invention, the air supply device 4 comprises two air compressors 37 connected in parallel, the two air compressors 37 being connected in parallel and then to an air reservoir 38; by providing two air compressors 37 in parallel, one for each, the failure is automatically switched, improving the reliability of the system.

In a further preferred but non-limiting embodiment of the invention, the air supply device 4 is further provided with an air reservoir 38, the air reservoir 38 being arranged between the air compressor 37 and the fourth pressure sensor 39, the air reservoir 38 being under pressure for a prolonged period of time; when the air pressure in the air storage tank 38 is lower than the set pressure, the air compressor 37 is automatically pressurized, so that automatic inspection can be realized, meanwhile, the loading time of the air compressor 37 reaching the rated working condition can be reduced by starting under pressure, a stable air source is quickly provided, and the response time of the fire extinguishing system is further shortened. In the preferred but non-limiting embodiment of the invention, the water supply device 2 and the pressure stabilizing device 3 share one fire-fighting water tank 21, so that the occupied area can be saved, and the installation and implementation of the engineering site are convenient.

The mixing device 5 comprises a foam mixer 44 and a gas-liquid mixer 45; the foam mixer 44 is connected to the gas-liquid mixer 45, and the foam delivery line 19 and the water delivery line 28 are both connected to the foam mixer 44, while the gas delivery line 43 is connected to the gas-liquid mixer 45.

In a preferred but non-limiting embodiment of the invention, the mixing device 5 is further provided with a fifth pressure sensor 46, the fifth pressure sensor 45 being arranged between the gas-liquid mixer 35 and the fire main line 9 for monitoring the pressure of the foam mixture.

The control device 6 is electrically connected with the foam supply device 1, the water supply device 2, the pressure stabilizing device 3, the air supply device 4 and the partition selection valve 5, and the control device 6 realizes linkage control on the foam supply device by collecting signals of pressure, flow, an electric valve, an electric regulating valve and the like of each device; the control device 6 can automatically or manually start and stop the compressed air foam fire extinguishing system, and can control the compressed air foam fire extinguishing system to periodically patrol.

The embodiment 2 of the invention provides an intelligent efficient compressed air foam fire extinguishing method, which is based on an intelligent efficient compressed air foam fire extinguishing system and comprises the following steps of:

opening the partition selection valve 7 by the control device 6;

after the partition selection valve 7 is opened, the pressurized water stored in the main fire-fighting pipeline 9 is conveyed to the branch fire-fighting pipeline 10;

the pressurized water delivered from the fire branch 10 is sprayed to extinguish the fire by the spraying device 8.

Further, the intelligent efficient compressed air foam fire extinguishing method further comprises the following steps:

starting the foam supply device 1, the water supply device 2 and the air supply device 4 through the control device 6, and mixing water, foam and compressed air three-element gas-liquid two-phase flow through the mixing device 5;

the mixed foam is conveyed to a spraying device 8, and the foam is sprayed to extinguish fire through the spraying device 8.

After the scene confirms the fire condition, the control device 6 opens the partition selection valve 7, the pressurized water stored in the main fire-fighting pipeline 9 quickly enters the branch fire-fighting pipeline 10, and the tail end spraying device 8 can spray water to extinguish fire immediately, so that quick response is realized; meanwhile, the control device 6 is linked to start the foam supply device 1, the water supply device 2 and the air supply device 4, and water, foam and compressed air three-element gas-liquid two-phase flow are mixed by the mixing device 5 to generate uniform and fine foam and are conveyed to the spraying device 8 to continuously extinguish fire; in addition, the control device 6 can control the flow required by the output of the foam supply device 1, the water supply device 2 and the air supply device 4 according to the on-site fire condition and the supply intensity requirement, so as to realize the self-adaptive adjustment of the system flow, the foam mixing ratio, the gas-liquid ratio and other performance parameters of the compressed air foam fire extinguishing system, and improve the applicability of the system.

Compared with the prior art, the invention has the beneficial effects that the control device and the partition selection valve are arranged, so that the pressurized water stored in the main fire-fighting pipeline can be controlled to be started to enter the branch fire-fighting pipeline quickly, and the fire can be immediately sprayed to extinguish the fire through the spraying device, thereby realizing quick response; simultaneously, the foam supply device, the water supply device and the air supply device are started in a linkage way through the control device, three-element gas-liquid two-phase flow of water, foam and compressed air is conveyed into the mixing device for mixing, uniform and fine foam is generated, and the foam is conveyed to the spraying device for continuous fire extinguishment; in addition, the control device can control the flow required by the output of the foam supply device, the water supply device and the air supply device according to the requirements of on-site fire conditions and supply strength, so that the self-adaptive adjustment of the system flow, the foam mixing ratio, the gas-liquid ratio and other performance parameters of the compressed air foam fire extinguishing system is realized, and the applicability of the system is improved.

Furthermore, the compressed air foam fire extinguishing system provided by the invention is provided with the pressure stabilizing device, the fire main pipeline between the outlet of the mixing device and the partition selection valve is filled with pressure water, when the water pressure is lower than the pressure stabilizing lower limit, the pressure stabilizing pump is started to fill water and pressurize the main pipeline, so that the pipeline maintains a certain water pressure, and water can be sprayed to extinguish fire immediately after a fire occurs, thereby realizing quick response.

Furthermore, the compressed air foam fire extinguishing system provided by the invention automatically controls water, foam and compressed air flow based on the electric regulating valve, the servo motor and the intelligent control device, can perform self-adaptive regulation according to the supply strength requirements of different application scenes, and has wider applicability

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims

1. An intelligent high-efficiency compressed air foam fire extinguishing system, comprising: foam supply device (1), water supply device (2), air feed device (4) and mixing arrangement (5), its characterized in that:

the fire suppression system further comprises: a pressure stabilizing device (3), a partition selecting valve (7) and a control device (6);

the foam supply device (1) is connected with the mixing device (5) through a foam conveying pipeline (19), the water supply device (2) and the pressure stabilizing device (3) are connected with the mixing device (5) through a water conveying pipeline (28), the air supply device (4) is connected with the mixing device (5) through an air conveying pipeline (43), the mixing device (5) is connected with the partition selection valve (7) through a fire main pipeline (9), and the pressure water supplied by the pressure stabilizing device (3) is prestored in the fire main pipeline (9); the partition selection valve (7) is connected with the spraying device (8) through a fire branch pipeline (10); the control device (6) is electrically connected with the foam supply device (1), the water supply device (2), the pressure stabilizing device (3), the air supply device (4) and the partition selection valve (5).

2. The intelligent high-efficiency compressed air foam fire suppression system of claim 1, wherein:

the foam supply device (1) comprises a foam liquid tank (11), a first electric valve (12), a first manual butterfly valve (13), a foam liquid pump (14), a first one-way valve (15), a first pressure sensor (16), a first electric regulating valve (17) and a first flowmeter (18) which are sequentially connected.

3. The intelligent high-efficiency compressed air foam fire suppression system of claim 2, wherein:

two groups of foam conveying pipelines which are connected in parallel are arranged between the first manual valve (12) and the first pressure sensor (16) in the foam supply device (1), and each group of foam conveying pipelines comprises a first manual butterfly valve (13), a foam liquid pump (14) and a first one-way valve (15) which are sequentially connected.

4. The intelligent high-efficiency compressed air foam fire suppression system of claim 2, wherein:

a first return pipeline is arranged between the foam liquid tank (11) and the foam liquid pump (14), and a first pressure-holding relief valve (20) is arranged on the first return pipeline and used for periodically inspecting or relieving pressure of the foam supplying device (1).

5. The intelligent high-efficiency compressed air foam fire suppression system according to any one of claims 1-4, wherein:

the water supply device (2) comprises a fire-fighting water tank (21), a second manual butterfly valve (22), a fire-fighting water pump (23), a second one-way valve (24), a second pressure sensor (25), a second electric regulating valve (26) and a second flowmeter (27) which are sequentially connected.

6. The intelligent high-efficiency compressed air foam fire suppression system of claim 5, wherein:

the water supply device (2) is characterized in that two groups of fire water conveying pipelines which are connected in parallel are arranged between the fire water tank (21) and the second pressure sensor (25), and each group of fire water conveying pipelines comprises a second manual butterfly valve (22), a fire water pump (23) and a second one-way valve (24) which are connected in sequence.

7. The intelligent high-efficiency compressed air foam fire suppression system of claim 5, wherein:

a second return pipeline is arranged between the fire-fighting water tank (21) and the fire-fighting water pump (23), and a second pressure-holding relief valve (29) is arranged on the second return pipeline and used for periodically inspecting or relieving pressure of the water supply device (2).

8. The intelligent high-efficiency compressed air foam fire suppression system according to any one of claims 1-4, wherein:

the pressure stabilizing device (3) comprises a fire-fighting water tank (21), a second electric valve (30), a third manual butterfly valve (31), a pressure stabilizing pump (32), a third one-way valve (33) and a third pressure sensor (34) which are sequentially connected.

9. The intelligent high-efficiency compressed air foam fire suppression system of claim 8, wherein:

the pressure stabilizing device (3) is characterized in that two groups of parallel pressure stabilizing pipelines are arranged between the second manual valve (30) and the water conveying pipeline (28), and each group of pressure stabilizing pipelines comprises a third manual butterfly valve (31), a pressure stabilizing pump (32) and a third one-way valve (33) which are sequentially connected.

10. The intelligent high-efficiency compressed air foam fire suppression system of claim 8, wherein:

the pressure stabilizing device (3) is also provided with a diaphragm air pressure tank (36) and a fourth manual butterfly valve (35); the fourth manual butterfly valve (35) is connected with the diaphragm air pressure tank (36) and then is connected with the third one-way valve (33); the fourth manual butterfly valve (35) is also connected with the water delivery pipeline (28), and a third pressure sensor (34) is arranged on the connecting pipeline of the fourth manual butterfly valve (35) and the water delivery pipeline (28).

11. The intelligent high-efficiency compressed air foam fire suppression system according to any one of claims 1-4, wherein:

the air supply device (4) comprises an air compressor (37), a fourth pressure sensor (39), a third flowmeter (40), a third electric valve (41) and a fourth one-way valve (42) which are sequentially connected.

12. The intelligent high-efficiency compressed air foam fire suppression system of claim 11, wherein:

the air supply device 4 comprises two air compressors 37 connected in parallel, and the two air compressors 37 are connected in parallel and then connected with an air storage tank 38.

13. The intelligent high-efficiency compressed air foam fire suppression system of claim 11, wherein:

the air supply device (4) is also provided with an air storage tank (38), and the air storage tank (38) is arranged between the air compressor (37) and the fourth pressure sensor (39).

14. The intelligent high-efficiency compressed air foam fire suppression system according to any one of claims 1-4, wherein:

the mixing device (5) comprises a foam mixer (44) and a gas-liquid mixer (45); the foam mixer (44) is connected with the gas-liquid mixer (45), and the foam conveying pipeline (19) and the water conveying pipeline (28) are connected with the foam mixer (44), and the gas conveying pipeline (43) is connected with the gas-liquid mixer (45).

15. An intelligent high-efficiency compressed air foam fire extinguishing method based on the intelligent high-efficiency compressed air foam fire extinguishing system of any one of claims 1 to 14, characterized by comprising the following steps:

opening a partition selection valve (7) through a control device (6);

after the partition selection valve (7) is opened, the pressurized water stored in the fire main pipeline (9) is conveyed to the fire branch pipeline (10);

the pressurized water output from the fire branch (10) is sprayed to extinguish fire through the spraying device (8).

16. The intelligent high-efficiency compressed air foam fire suppression method of claim 15, further comprising the steps of:

starting a foam supply device (1), a water supply device (2) and a gas supply device (4) through a control device (6), and mixing water, foam and compressed air three-element gas-liquid two-phase flow through a mixing device (5);

the mixed foam is conveyed to a spraying device (8), and the foam is sprayed to extinguish fire through the spraying device (8).