Waterfall type compressed air foam fireproof fire extinguishing device

Abstract

According to the waterfall type compressed air foam fireproof fire extinguishing device, a compressed foam generator is arranged in a device outer shell of the foam fire extinguishing device, the material of the compressed foam generator is a porous cylinder formed by a high-molecular polymer, and micropores with the porosity of 80% or above are formed in the surface of the compressed foam generator; the waterfall type compressed air foam fire prevention and extinguishing device is simple in structure and high in foaming efficiency, adopts a point-to-point waterfall type fire extinguishing treatment method, improves the fire extinguishing efficiency, is high in adaptability, and has the technical effects of reducing the fire range, reducing fire loss, being high in fire extinguishing efficiency and the like.

Description

Technical Field

[0001] This article belongs to the technical field of compressed air foam, specifically relating to a waterfall-type compressed air foam fire prevention and extinguishing device. Background Technology

[0002] Compressed Air Foam System (CAFS) is a highly efficient foam fire extinguishing method. The extinguishing foam produced by a CAFS system has excellent heat radiation isolation capabilities, adhering and covering the surface of burning materials for an extended period, thereby absorbing more heat and greatly enhancing fire extinguishing effectiveness.

[0003] It can extinguish fires in various environments. Currently, there are mainly (1) vehicle-mounted compressed air foam extinguishing systems, (2) small mobile compressed air foam extinguishing systems, (3) portable compressed air foam extinguishing systems, and (4) integrated compressed air foam extinguishing systems. The first three require manual intervention to spray and output foam, thus requiring reaction time and not being able to handle the fire scene in a timely manner. The fourth type can automatically respond to and handle the fire through a fire alarm, but the system is generally more complex, requiring both an air compressor and a fire pump to input pressurized gas and pressurized liquid into a gas-liquid mixer to generate foam. The foam output method is also spraying. The system is complex and has a high investment cost, which can easily cause damage to the burning materials. In addition, the gas-liquid mixer has a complex structure, resulting in insufficient mixing of gas and liquid and relatively low gas utilization.

[0004] The technical problem to be solved by this invention is: to provide another foam output method in an integrated compressed air foam fire extinguishing system; to optimize the system structure; to improve gas utilization and to design and create a new gas-liquid mixing foaming method. Utility Model Content

[0005] To address the aforementioned problems, this paper proposes a waterfall-type compressed air foam fire extinguishing device. The device's outer casing houses a compressed foam generator, which is a porous cylindrical material formed from a high-molecular polymer. The surface of the compressed foam generator has micropores with a porosity exceeding 80%, and the micropore diameter is 5-50 micrometers. The compressed foam generator is submerged in the foam liquid within the outer casing. The outer casing is cylindrical in shape, with several adjustable lifting rings vertically positioned at the top. Foam distributors protrude from the front and rear sides of the bottom of the outer casing. The device features a surface-conducting foam overflow outlet in the shape of a rectangular slot. An overflow cover is embedded within the foam overflow outlet, protruding above it. The cover is pneumatically operated and moves vertically within the outlet. The front and rear sides of the foam distributor protrude from the front and rear sides of the device's outer casing. This simple, high-efficiency, point-to-point waterfall-style fire suppression system enhances fire extinguishing efficiency. This adaptable waterfall-style compressed air foam fire extinguishing device reduces the fire's spread, minimizes fire damage, and provides high fire suppression efficiency.

[0006] The outer shell of the device is a hollow cylindrical cavity. A foam liquid injection port is located at the top of one end of the outer shell. An upper reinforcing rib is horizontally connected to the top of the inner side of the outer shell, and a lower reinforcing rib is horizontally connected to the bottom of the outer side. A foam distributor is externally mounted on the outer side of the lower reinforcing rib. An air inlet, an outlet, and an air pressure regulating valve are connected through the surface of one end of the outer shell. A liquid level gauge is embedded in the surface of the other end of the outer shell. A level is horizontally mounted in the middle of the outer surface of the outer shell. By using the horizontal cylindrical cavity, not only can a horizontal hanging installation effect be achieved, but also a waterfall-like descent of foam from both the front and rear sides can be achieved, thus realizing the foam generation effect.

[0007] The compressed foam generator is a strip-shaped submerged generator with the same length as the internal length of the outer shell of the device. An air chamber is provided in the center of the compressed foam generator. The air chamber inside the compressed foam generator is connected to the air pressure regulating valve through an air inlet hose. The surface of the compressed foam generator outside the air chamber is provided with several micropores. The submerged foam generator is used to produce a new type of foaming method with small, fine and uniform foam particle size, high foaming ratio and foaming rate, and high gas utilization rate.

[0008] The foam distributor is shaped like an arc plate, with both arc sides protruding outwards from the outer shell of the device. The inner center of the foam distributor is connected to the outer shell of the device via a lower reinforcing rib. The lower reinforcing rib is a folded groove type, and its interior is sealed and connected to the interior of the outer shell of the device. The bottom of the lower reinforcing rib has a foam liquid drain port that penetrates the bottom surface of the foam distributor. Through the bottom foam distributor, the foam drawn from the foam overflow port receives the foam drawn from above and then overflows from both sides, thus achieving a waterfall-like foam effect.

[0009] The foam overflow outlets are arranged horizontally at equal intervals. Adjustable lifting rings are fixed at both ends of each outlet. The height of the foam overflow outlet is less than one-third of the height of the outer casing of the device. A horizontal upper reinforcing rib is located on the inner side of each outlet, and an overflow outlet cover plate is movable vertically on the inner side. The foam output method is simple, overflowing directly from the outer casing of the foam generating device, providing point-to-point waterfall-like coverage. It is highly efficient for both fire extinguishing and fire isolation. It has a high degree of automation, directly activated by fire warning or alarm. Operating costs are low; after each use, only foaming liquid needs to be replenished, and the system can continue to be used after on-site testing.

[0010] The overflow cover is a rectangular shell made of folded plate welded material. The outer contour of the overflow cover is the same as the inner contour of the foam overflow outlet. The inner top surface of the overflow cover is fixedly connected to a pneumatic overflow cover switch. The pneumatic overflow cover switch is a pneumatic push-rod type switch. The pneumatic overflow cover switch communicates with the outside of the device housing by opening the air inlet and closing the air outlet. The base of the pneumatic overflow cover switch is fixed to the top surface of the upper reinforcing rib. The push rod of the pneumatic overflow cover switch is connected to the inner top surface of the overflow cover. Through the lifting overflow cover, the foam overflow outlet can be actively controlled to seal or open, and the thickness and flow rate of the waterfall-style foam can also be controlled, thus achieving a simple and efficient automated control effect.

[0011] Beneficial effects:

[0012] With its simple structure, high foaming efficiency, point-to-point waterfall-style fire extinguishing method, and highly adaptable waterfall-style compressed air foam fire prevention and extinguishing device, this device offers technical benefits such as reducing the fire's range, minimizing fire losses, and achieving high fire extinguishing efficiency.

[0013] The system has a simple structure, high reliability, and saves on system investment: a device that combines foam generation and foam release units into one.

[0014] A novel foaming method using an immersion foam generator produces small, fine, and uniform foam particles with high expansion ratio and foaming rate, as well as high gas utilization.

[0015] The foam output method is simple, with direct overflow from the outer shell of the foam generating device, providing point-to-point waterfall-like coverage, which is highly efficient for both fire extinguishing and fire isolation; it has a high degree of automation, and can be directly activated through fire warning or alarm; it has low operating costs, and after each use, only foaming liquid needs to be replenished, and the system can continue to be used after on-site testing.

[0016] By using a horizontal cylindrical cavity, not only can a horizontal hanging installation effect be achieved, but also a waterfall-like descent of foam from both the front and rear sides can be achieved to generate foam.

[0017] The bottom-mounted demagnetizer allows the foam drawn from the foam overflow outlet to receive the foam drawn from above, and then overflow and spread from both sides, thus achieving a waterfall-like foam effect.

[0018] The lifting overflow cover allows for active control of sealing or opening the foam overflow outlet, as well as controlling the thickness and flow rate of the waterfall-style foam, achieving a simple and efficient automated control effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a waterfall-type compressed air foam fire prevention and extinguishing device.

[0020] Figure 2 This is a schematic diagram of the internal structure of a waterfall-type compressed air foam fire prevention and extinguishing device.

[0021] Figure 3 This is a schematic diagram of the left end of a waterfall-type compressed air foam fire prevention and extinguishing device.

[0022] Figure 4 This is a schematic diagram of the right end of a waterfall-type compressed air foam fire prevention and extinguishing device.

[0023] In the diagram: 1. Container housing; 2. Foam distributor; 3. Compressed foam generator; 4. Overflow port cover; 5. Pneumatic overflow port switch; 6. Adjustable lifting ring; 7. Open air inlet; 8. Close air outlet; 9. Air inlet pressure regulating valve; 10. Foam liquid injection port; 11. Foam liquid drain port; 12. Level; 13. Liquid level gauge; 14. Air inlet hose; 15. Upper reinforcing rib; 16. Lower reinforcing rib; 17. Foam overflow port. Detailed Implementation

[0024] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0025] The device includes: outer casing 1, foam distributor 2, compressed foam generator 3, overflow port cover 4, pneumatic overflow port switch 5, adjustable lifting ring 6, open air inlet 7, close air outlet 8, air inlet pressure regulating valve 9, foam liquid injection port 10, foam liquid drain port 11, level 12, liquid level gauge 13, air inlet hose 14, upper reinforcing rib 15, lower reinforcing rib 16, and foam overflow port 17.

[0026] like Figure 1 , 2 As shown in Figures 3 and 4;

[0027] A waterfall-type compressed air foam fire extinguishing device includes a compressed foam generator 3 inside the outer casing 1. The compressed foam generator 3 is a porous cylindrical material formed from a high-molecular polymer. The surface of the compressed foam generator 3 has micropores with a porosity of over 80%, and the micropore diameter is 5-50 micrometers. The compressed foam generator 3 is submerged in foam liquid inside the outer casing 1. The outer casing 1 is cylindrical in shape. Several adjustable lifting rings 6 are vertically arranged at the top of the outer casing 1. Foam distributors 2 protrude from the front and rear sides of the bottom of the outer casing 1. A foam overflow port 17 is provided on the upper surface of the outer casing 1. The shape of 17 is a rectangular slot. An overflow cover 4 is embedded inside the foam overflow port 17. The overflow cover 4 is embedded and protrudes above the foam overflow port 17. The interior of the overflow cover 4 is moved up and down inside the foam overflow port 17 by a pneumatic overflow cover switch 5. The front and rear sides of the foam distributor 2 are protruding on the front and rear width surfaces of the device housing 1. The device housing 1 is a hollow cylindrical cavity. A foam liquid injection port 10 is provided at the top of one end of the device housing 1. An upper reinforcing rib 15 is provided horizontally through the top of the inner side of the device housing 1. A lower reinforcing rib 16 is provided horizontally through the bottom of the outer side of the device housing 1. The outer side of the lower reinforcing rib 16 is... The device includes a foam equalizer 2. One end of the outer casing 1 has an open air inlet 7, a closed air outlet 8, and an air pressure regulating valve 9. The other end of the outer casing 1 has an embedded liquid level gauge 13. A level 12 is horizontally positioned in the middle of the outer surface of the outer casing 1. The compressed foam generator 3 is a strip-shaped submersible generator with a length equal to the internal length of the outer casing 1. An air chamber is located at the center of the compressed foam generator 3. This air chamber is connected to the air pressure regulating valve 9 via an air inlet hose 14. The surface of the compressed foam generator 3 outside the air chamber has several micropores. The foam equalizer 2 is an arc-shaped plate. The two sides of the arc-shaped protrusion are located on the outer side of the outer casing 1 of the device. The inner center of the foam distributor 2 is connected to the outer casing 1 of the device through the lower reinforcing rib 16. The lower reinforcing rib 16 is a folded groove type reinforcing rib. The interior of the lower reinforcing rib 16 is mutually sealed and connected with the interior of the outer casing 1 of the device. The bottom of the lower reinforcing rib 16 penetrates the bottom surface of the foam distributor 2 and is provided with a foam liquid drain port 11. Several foam overflow ports 17 are provided horizontally at equal intervals. Both ends of the foam overflow ports 17 are fixedly provided with adjustable lifting rings 6. The height of the foam overflow ports 17 is less than one-third of the height of the outer casing 1 of the device. The inner side of the foam overflow ports 17 is provided with an upper reinforcing rib 15 horizontally. The inner side of the foam overflow ports 17 is provided with an overflow port cover plate 4 that can be moved up and down.The overflow cover 4 is a rectangular shell made of folded plate welded material. The outer contour of the overflow cover 4 is the same as the inner contour of the foam overflow port 17. The inner top surface of the overflow cover 4 is fixedly connected to the pneumatic overflow cover switch 5. The pneumatic overflow cover switch 5 is a pneumatic push-rod switch. The pneumatic overflow cover switch 5 communicates with the outside of the device housing 1 by opening the air inlet 7 and closing the air outlet 8. The base of the pneumatic overflow cover switch 5 is fixedly connected to the top surface of the upper reinforcing rib 15. The push rod of the pneumatic overflow cover switch 5 is connected to the inner top surface of the overflow cover 4.

[0028] Implementation example;

[0029] Example 1: Point-to-point waterfall-style coverage of compressed air foam for fire prevention and extinguishing in public spaces

[0030] This case generally refers to the prevention and control measures for hazardous and flammable sources in public environments, such as electric vehicle charging stations or parking areas.

[0031] Device setup

[0032] Each hazardous source is equipped with a waterfall-style compressed air foam (fireproof) extinguishing device suspended above the hazardous source. The system consists of a screw air compressor, a system control box, compressed air pipelines and parking space unit control valves, parking space fire (fire) alarms and waterfall-style compressed air foam (fireproof) extinguishing devices.

[0033] Operation process

[0034] When the hazard source fire alarm is activated, it indicates a fire hazard has occurred. The screw-type air compressor is started via the fire alarm above the hazard source, opening the foam distribution plate. Compressed air is instantly introduced into the foaming device through the pipeline. After passing through a release device with a polymer media layer, the air comes into contact with the solution to be foamed, generating foam. The resulting foam flows through the foam distribution plate in a waterfall-like manner towards the hazard source, providing flood cooling, blocking air, and extinguishing the fire, lasting for at least half an hour. Wait for professional firefighters to arrive.

[0035] Effect evaluation

[0036] By comparing the reaction speed before and after using the device of this invention, it is faster than the reaction time of other foam fire extinguishing or fire isolation methods. Secondly, the instantaneous output of waterfall-type foam is large, which can quickly cover the hazard source with foam. The waterfall-type compressed air foam (fire prevention) extinguishing device is superior to other forms of foam output. At the same time, the system does not require the input of water source pipelines and foam liquid dosing pipelines.

[0037] Example 2: Application in factories and mines – Point-to-point waterfall-style coverage compressed air foam fire prevention and extinguishing application

[0038] The area is characterized by numerous and densely packed hazardous sources, large oil storage volumes, and high operating temperatures, presenting challenges to fire suppression such as deflagration and obstruction. Fixed compressed air foam fire extinguishing systems (CAFS) offer advantages including strong fire suppression capabilities, rapid response, minimal water damage, high safety and reliability, and high fire suppression efficiency.

[0039] Device setup

[0040] It consists of a rear-end screw air compressor (or nitrogen cylinder) for compressed gas, compressed air pipelines and unit pneumatic control valves, foam liquid supply unit, and system control unit; and a front-end fire alarm and waterfall-type compressed air foam (fire prevention) extinguishing device.

[0041] Operation process

[0042] After receiving a fire alarm from a hazardous source, the system directly starts the screw air compressor (or nitrogen cylinder) to compress gas through the control unit, opens the foam uniform output plate, and after a few seconds, the foam flows to the hazardous source in a waterfall-like manner. At the same time, the foam liquid supply unit intermittently supplies liquid to the waterfall-type compressed air foam (fire prevention) extinguishing device.

[0043] Effect evaluation

[0044] The waterfall-style compressed air foam (fireproof) extinguishing device integrates foam generation and output. The foam output is in a waterfall pattern, with a short output distance and a large output volume, enabling rapid coverage and flooding of hazardous sources. Furthermore, it allows for independent point-to-point coverage and flooding of different hazardous sources. The extinguishing operation takes a long time.

[0045] Example 3: Application of Waterfall-Style Compressed Air Foam (Fireproof) Extinguishing in Vehicle Tunnels

[0046] This application scenario refers to situations where the area is far from urban areas and where water and electricity supply are difficult, but there is a need for fire protection. In such cases, a waterfall-style compressed air foam (fireproof) extinguishing system can be installed to provide protection.

[0047] Device setup

[0048] The back end uses a combined nitrogen cylinder unit as the compressed gas source, system compressed gas pipeline and unit control valve, system control unit, and solar power supply unit; the front end consists of a fire alarm and a waterfall-type compressed air foam (fire prevention) extinguishing device.

[0049] Operation process

[0050] This system uses solar energy to power the front-end fire alarm and unit control valves, dividing the tunnel into several fireproof cells. The fire alarms above the cells monitor the system, and when a hazard occurs, the system automatically opens the nitrogen cylinder unit and the waterfall-style compressed air foam extinguishing device above the cell to uniformly distribute the foam in a point-to-point waterfall manner, covering and controlling the hazard.

[0051] Effect evaluation

[0052] First, it solves the difficulties in water and electricity supply; second, it enables immediate early fire control and response after an emergency occurs, with a fast response time and precise handling. The system also features low investment.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterfall-type compressed air foam fire extinguishing device, wherein a compressed foam generator is provided inside the outer casing of the foam fire extinguishing device, characterized in that, The compressed foam generator is made of a porous cylindrical material formed from a high-molecular polymer. The surface of the compressed foam generator has micropores with a porosity of over 80%, and the micropore diameter is 5-50 micrometers. The compressed foam generator is submerged in foam liquid inside the outer shell of the device. The outer shell is cylindrical in shape. Several adjustable lifting rings are vertically arranged on the top of the outer shell. Foam flow equalizers are protruding on the front and rear sides of the bottom of the outer shell. Foam overflow ports are provided on the upper surface of the outer shell. The foam overflow ports are rectangular slotted openings. An overflow port cover is embedded inside the foam overflow port. The overflow port cover is embedded and protrudes above the foam overflow port. The interior of the overflow port cover is moved up and down by a pneumatic overflow port switch. The front and rear sides of the foam flow equalizer are protruding on the front and rear width surfaces of the outer shell of the device.

2. The waterfall-type compressed air foam fire extinguishing device according to claim 1, characterized in that, The outer shell of the device is a hollow cylindrical cavity. A foam liquid injection port is provided at the top of one end of the outer shell. An upper reinforcing rib is provided horizontally through the top of the inner side of the outer shell. A lower reinforcing rib is provided horizontally through the bottom of the outer side of the outer shell. A foam flow equalizer is provided outside the lower reinforcing rib. An open air inlet, a closed air outlet, and an air pressure regulating valve are provided through the surface of one end of the outer shell. A liquid level gauge is embedded in the surface of the other end of the outer shell. A level is provided horizontally in the middle of the outer surface of the outer shell.

3. A waterfall-type compressed air foam fire extinguishing device according to claim 1, characterized in that, The compressed foam generator is a strip-shaped submersible generator with the same length as the internal length of the device housing. An air chamber is provided in the center of the compressed foam generator. The air chamber inside the compressed foam generator is connected to the air pressure regulating valve through an air inlet hose. Several micropores are provided on the surface of the compressed foam generator outside the air chamber.

4. A waterfall-type compressed air foam fire extinguishing device according to claim 1, characterized in that, The foam flow equalizer is shaped like an arc plate, with both arc sides protruding outwards from the outer side of the device housing. The inner center of the foam flow equalizer is connected to the device housing via a lower reinforcing rib.

5. A waterfall-type compressed air foam fire extinguishing device according to claim 2, characterized in that, The lower reinforcing rib is a folded groove type reinforcing rib. The interior of the lower reinforcing rib is sealed and connected to the interior of the device housing. The bottom of the lower reinforcing rib is provided with a foam liquid drain port that penetrates the bottom surface of the foam distributor.

6. A waterfall-type compressed air foam fire extinguishing device according to claim 1, characterized in that, The foam overflow outlets are arranged horizontally at equal intervals. Both ends of the foam overflow outlets are fixed with adjustable lifting rings. The height of the foam overflow outlets is less than one-third of the height of the device housing. The inner side of the foam overflow outlets is provided with upper reinforcing ribs arranged horizontally. The inner side of the foam overflow outlets is provided with overflow outlet covers that can be moved up and down.

7. A waterfall-type compressed air foam fire extinguishing device according to claim 1, characterized in that, The overflow port cover is a rectangular shell with folded plate welding. The outer contour shape of the overflow port cover is the same as the inner contour shape of the foam overflow port. The inner top surface of the overflow port cover is fixedly connected to the pneumatic overflow port switch. The pneumatic overflow port switch is a pneumatic push rod type switch. The pneumatic overflow port switch communicates with the outside of the device housing by opening the air inlet and closing the air outlet. The base of the pneumatic overflow port switch is fixed to the top surface of the upper reinforcing rib. The push rod of the pneumatic overflow port switch is connected to the inner top surface of the overflow port cover.

Images