WO2024174380A1

WO2024174380A1 - Aerosol fire extinguishing device provided with gas flow dividing disc and fire extinguishing method thereof

Info

Publication number: WO2024174380A1
Application number: PCT/CN2023/091564
Authority: WO
Inventors: 周扬; 赵恒�; 付成; 朱元滢
Original assignee: 湖北及安盾消防科技有限公司
Priority date: 2023-02-22
Filing date: 2023-04-28
Publication date: 2024-08-29
Also published as: WO2024174380A9; CN116251318A

Abstract

An aerosol fire extinguishing device provided with a gas flow dividing disc and a fire extinguishing method thereof. The aerosol fire extinguishing device comprises an outer cylinder (1) and a fire extinguishing agent column (2) provided inside the outer cylinder; one end of the fire extinguishing agent column is connected to the tail end of a starting component (3); a front cover (4) is provided on the front side of the outer cylinder; nozzle openings (5) are formed in the surface of the front cover; a rotatable gas flow dividing disc (6) is provided on the front sides of the nozzle openings. The flow velocity and the temperature of the nozzle openings of the aerosol fire extinguishing device can be effectively reduced, and flames can be prevented from being sprayed outwards.

Description

Aerosol fire extinguishing device with gas diversion disk and fire extinguishing method thereof

Technical Field

The invention relates to the technical field of aerosol fire extinguishing, in particular to an aerosol fire extinguishing device with a gas diversion disk and a fire extinguishing method thereof.

Background Art

The aerosols of aerosol fire extinguishers currently on the market are all solid-based thermal aerosols. The fire extinguishing agents are mainly composed of oxidants, fuels, catalysts and additives. The fire extinguishing agents need to undergo an exothermic combustion reaction. When spraying, there may be phenomena such as too fast a spraying flow rate, too high a nozzle temperature, and flames spraying outward, which may cause secondary damage to the protected objects. Therefore, reducing the nozzle flow rate and temperature of aerosol fire extinguishers has become an important indicator of the safety of such products.

Summary of the invention

The object of the present invention is to overcome the above-mentioned shortcomings and provide an aerosol fire extinguishing device with a gas diverter disk and a fire extinguishing method thereof, which can reduce the nozzle flow rate and temperature of the aerosol fire extinguishing device and prevent the flame from spraying out.

In order to solve the above technical problems, the technical solution adopted by the present invention is: an aerosol fire extinguishing device with a gas diverter disk, comprising an outer cylinder and a fire extinguishing agent column arranged inside the outer cylinder, one end of the fire extinguishing agent column is connected to the end of the starting component, a front cover is arranged on the front side of the outer cylinder, a nozzle is opened on the surface of the front cover, and a rotatable gas diverter disk is arranged on the front side of the nozzle.

Preferably, a membrane is provided on the outer layer and/or inner side of the nozzle.

Preferably, the gas diverter disk is an axial flow fan blade structure.

Preferably, the center position of the gas diversion plate is rotatably connected to one end of a support rod, and the other end of the support rod is installed at the center position of the front cover.

Preferably, one end of the support rod is provided with an internal threaded hole matched with one end of a half-thread screw, and the other end of the half-thread screw is sleeved in the central through hole of the gas diversion plate.

Preferably, the starting component is an electric ignition head or a thermal wire structure, and an isolation frame is provided at the position where the end of the starting component contacts one end of the fire extinguishing agent column.

Preferably, a coolant is provided between the ignition end of the fire extinguishing agent column and the nozzle.

Preferably, the coolant includes a physical coolant and a chemical coolant, the physical coolant is one or more combinations of iron chips, ceramic balls, and goose warm stones, and the chemical coolant is one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene.

Preferably, the front side of the outer cylinder is threadedly matched with the front cover, and the rear side of the outer cylinder is provided with a rear cover threadedly matched with the front cover, and the rear cover is provided with a through hole for passing the starting component.

In addition, the present invention also discloses a fire extinguishing method of the aerosol fire extinguishing device with a gas diverter plate, which comprises the following steps: Steps:

S1: When a fire occurs, the starting component ignites the fire extinguishing agent column to form an aerosol fire extinguishing substance, which is then cooled by the coolant and then sprayed out from the nozzle of the front cover by tearing the membrane;

S2: The aerosol fire extinguishing material is ejected from the nozzle and continuously hits the gas diverter plate, causing the gas diverter plate to rotate. The kinetic energy of the aerosol fire extinguishing material when ejected is partially converted into the kinetic energy of the gas diverter plate rotation, thereby reducing the ejection flow rate of the aerosol fire extinguishing material;

S3: When the gas diverter plate rotates, it will also cut and disperse the aerosol fire extinguishing material, causing it to spread out in advance, effectively reducing the temperature in the nozzle area and preventing the flame from spraying out from the nozzle;

S4: The aerosol fire extinguishing material diffused by the rotation of the gas diversion disk is used to extinguish the fire.

Beneficial effects of the present invention:

1. The present invention can effectively reduce the nozzle flow rate and temperature of the aerosol fire extinguishing device and prevent the flame from spraying out;

2. The aerosol fire extinguishing material in the present invention can continuously hit the gas diverter plate when it is ejected from the nozzle, so that the gas diverter plate rotates, and the kinetic energy of the aerosol fire extinguishing material when it is ejected is partially converted into the kinetic energy of the gas diverter plate rotation, thereby reducing the ejection flow rate of the aerosol fire extinguishing material and reducing the impact damage to the protected object;

3. When the gas diverter plate in the present invention rotates, it will also cut and disperse the aerosol fire extinguishing material, so that it can be diffused in advance, effectively reducing the temperature of the nozzle area, and preventing the flame at the nozzle from spraying out.

4. After the traditional fire extinguishing device is started, the aerosol generator produces a large amount of gas, which is ejected through the front cover nozzle. The path of the high-temperature and high-pressure gas ejecting from the nozzle is relatively fixed, the gas density is high, and the temperature is relatively concentrated. There are phenomena of excessive nozzle temperature and flame spraying outward. However, the present invention provides a gas diverter disk to disperse the path of the airflow ejecting from the nozzle, reduce the gas density, and disperse the temperature, thereby solving the problem of excessive nozzle temperature and flame spraying outward.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an aerosol fire extinguishing device with a gas diverter plate;

FIG2 is an enlarged schematic diagram of the structure of the area where the gas diverter plate in FIG1 is located;

FIG. 3 is a schematic diagram of the exploded structure of FIG. 1 .

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, an aerosol fire extinguishing device with a gas diverter disk includes an outer tube 1 and a fire extinguishing agent column 2 arranged inside the outer tube 1, one end of the fire extinguishing agent column 2 is connected to the end of a starting component 3, a front cover 4 is provided on the front side of the outer tube 1, a nozzle 5 is opened on the surface of the front cover 4, and a rotatable gas diverter disk 6 is provided on the front side of the nozzle 5.

Preferably, the outer layer and/or inner side of the nozzle 5 is provided with a diaphragm 7. After the diaphragm 7 is provided, the diaphragm 7 can be When the fire extinguishing agent 2 and the coolant 10 in the fire extinguishing device are in the state of being decomposed, aged, or absorbed moisture, the membrane 7 is prevented from entering the fire extinguishing agent 2 and the coolant 10 in the fire extinguishing device. In addition, during the fire extinguishing process, after being impacted by the fire extinguishing material, the membrane 7 is fragile to ensure that the fire extinguishing material is ejected from the nozzle 5. Specifically, the membrane 7 can be made of a PVC sticker, a fragile sticker, a plastic film, or a rubber film.

Preferably, the gas diverter plate 6 is an axial fan blade structure. The blades of the gas diverter plate 6 in this embodiment have a certain inclination angle with the radial plane thereof. The gas diverter plate 6 of such a structure can efficiently drive the gas diverter plate 6 to rotate when the aerosol fire extinguishing substance passes through, so that the kinetic energy of the aerosol fire extinguishing substance when it is ejected is partially converted into the kinetic energy of the gas diverter plate 6 rotation.

More preferably, when the gas diverter plate 6 is made of metal, the metal has better thermal conductivity and can quickly disperse the temperature to various places instead of concentrating it at the nozzle, thereby reducing the local temperature. In addition, by subsequently adjusting the outer diameter of the gas diverter plate 6, the number and inclination angle of the blades, the angle between the blades, and the distance from the front cover nozzle, the angle and speed of the ejected airflow can be changed.

Preferably, the center position of the gas diverter plate 6 is rotatably connected to one end of a support rod 8 , and the other end of the support rod 8 is installed at the center position of the front cover 4 .

Preferably, one end of the support rod 8 is provided with an internal threaded hole matched with one end of the half-thread screw 9, and the other end of the half-thread screw 9 is sleeved in the central through hole of the gas diverter plate 6. This fixing method is simple to assemble and disassemble, and ultimately enables the gas diverter plate 6 to rotate with the half-thread screw 9 as the central axis, wherein a part of the half-thread screw 9 is screwed into the internal threaded hole at one end of the support rod 8, and the other part of the half-thread screw 9 is sleeved on the gas diverter plate 6, which can ensure that the gas diverter plate 6 can rotate freely around the half-thread screw 9. Moreover, by adjusting the depth of the half-thread screw 9 screwed into the internal threaded hole at one end of the support rod 8, the farthest distance between the gas diverter plate 6 and the nozzle 5 can be changed, so that the angle and speed of the ejected airflow can be conveniently adjusted.

Preferably, the starting component 3 is an electric ignition head or a thermal wire structure, and an isolation frame 12 is provided at the position where the end of the starting component 3 contacts one end of the fire extinguishing agent column 2. In the present embodiment, when the starting component 3 is an electric ignition head structure (the starting component in Fig. 1 is an electric ignition head form), it is connected to the fire detection device as a temperature sensor and/or a smoke sensor. When there is a fire, overheating, etc., the fire detection device detects that the external high temperature environment is generated due to the fire, and sends a signal to the microprocessor in the present embodiment. The microprocessor can be selected from 51 single-chip microcomputers, the model is 80C51 single-chip microcomputer, or an STM32 microprocessor, the model is STM32F103, and the microprocessor controls the starting component 3 to ignite the fire extinguishing agent column 2. When the starting component 3 is a thermal wire structure, because the thermal wire structure is relatively simple, when the thermal wire is used, it can be automatically started when a fire occurs, and the thermal wire directly ignites the fire extinguishing agent column 2, without the need to match additional fire detection devices and other external devices.

In addition, the isolation frame 12 can effectively prevent the coolant 10 from pressing the end of the starting component 3, thereby preventing the failure of the starting ignition process.

Preferably, a coolant 10 is further provided between the ignition end of the fire extinguishing agent column 2 and the nozzle 5. The coolant 10 can cool the fire extinguishing substance (such as aerosol or gas) generated by the fire extinguishing agent column 2, and after cooling, it is sprayed out from the nozzle 5, which can reduce the temperature at the nozzle 5 of the fire extinguishing device.

Preferably, the coolant 10 includes a physical coolant 10.1 and a chemical coolant 10.2, the physical coolant 10.1 is one or more combinations of iron shavings, ceramic balls, and goose warm stones, and the chemical coolant 10.2 is one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene.

Preferably, the front side of the outer cylinder 1 is threadedly matched with the front cover 4 , and the rear side of the outer cylinder 1 is provided with a rear cover 11 threadedly matched therewith, and the rear cover 11 is provided with a through hole for passing the starting component 3 .

In addition, the present invention also discloses a fire extinguishing method of the aerosol fire extinguishing device with a gas diverter plate, which comprises the following steps:

S1: When a fire occurs, the starting component 3 ignites the fire extinguishing agent column 2 (the fire extinguishing agent column 2 in this embodiment is a column formed by pressing an aerosol generating agent), forming an aerosol fire extinguishing substance, which is then cooled by the coolant 10 and then ejected from the nozzle 5 of the front cover 4 by tearing the membrane 7;

S2: The aerosol fire extinguishing material is ejected from the nozzle 5 and continuously hits the gas diverter plate 6, causing the gas diverter plate 6 to rotate. The kinetic energy of the aerosol fire extinguishing material when ejected is partially converted into the kinetic energy of the gas diverter plate 6 rotation, thereby reducing the ejection flow rate of the aerosol fire extinguishing material;

S3: When the gas diverter plate 6 rotates, it will also cut and disperse the aerosol fire extinguishing material, so that it can spread out in advance, effectively reduce the temperature of the nozzle 5 area, and prevent the flame at the nozzle 5 from spraying out;

S4: The aerosol fire extinguishing substance diffused by the rotation of the gas diverter plate 6 performs the fire extinguishing process.

The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

An aerosol fire extinguishing device with a gas diverter disk comprises an outer cylinder (1) and a fire extinguishing agent column (2) arranged inside the outer cylinder (1), one end of the fire extinguishing agent column (2) is connected to the end of a starting component (3), a front cover (4) is arranged on the front side of the outer cylinder (1), a nozzle (5) is opened on the surface of the front cover (4), and the device is characterized in that a rotatable gas diverter disk (6) is arranged on the front side of the nozzle (5).
An aerosol fire extinguishing device with a gas diverter disk according to claim 1, characterized in that a diaphragm (7) is provided on the outer layer and/or inner side of the nozzle (5).
An aerosol fire extinguishing device with a gas diverter disk according to claim 1, characterized in that the gas diverter disk (6) is an axial flow fan blade structure.
According to claim 3, an aerosol fire extinguishing device with a gas diverter disk is characterized in that the center position of the gas diverter disk (6) is rotatably connected to one end of a support rod (8), and the other end of the support rod (8) is installed at the center position of the front cover (4).
According to claim 4, an aerosol fire extinguishing device with a gas diverter disk is characterized in that: one end of the support rod (8) is provided with an internal threaded hole that cooperates with one end of a half-thread screw (9), and the other end of the half-thread screw (9) is inserted into the central through hole of the gas diverter disk (6).
An aerosol fire extinguishing device with a gas diverter disk according to claim 1 is characterized in that: the starting component (3) is an electric ignition head or a thermal wire structure, and an isolation frame (12) is provided at the position where the end of the starting component (3) contacts one end of the fire extinguishing agent column (2).
The aerosol fire extinguishing device with a gas diverter disk according to claim 1 is characterized in that a coolant (10) is provided between the ignition end of the fire extinguishing agent column (2) and the nozzle (5).
An aerosol fire extinguishing device with a gas diverter disk according to claim 7 is characterized in that: the coolant (10) includes a physical coolant (10.1) and a chemical coolant (10.2), the physical coolant (10.1) is one or more combinations of iron cuttings, ceramic balls, and goose warm stones, and the chemical coolant (10.2) is one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene.
An aerosol fire extinguishing device with a gas diverter disk according to claim 1 is characterized in that: the front side of the outer cylinder (1) is threadedly matched with the front cover (4), and the rear side of the outer cylinder (1) is provided with a rear cover (11) threadedly matched therewith, and the rear cover (11) is provided with a through hole for passing the starting component (3).
A fire extinguishing method of an aerosol fire extinguishing device with a gas diverter disk as claimed in any one of claims 1 to 9, characterized in that it comprises the following steps:

S1: When a fire occurs, the starting component (3) ignites the fire extinguishing agent column (2) to form an aerosol fire extinguishing substance, which is then cooled by the coolant (10) and then ejected from the nozzle (5) of the front cover (4) through the tearing membrane (7);

S2: The aerosol fire extinguishing substance is ejected from the nozzle (5) and continuously impacts the gas diverter disk (6), causing the gas diverter disk (6) to rotate. The kinetic energy of the aerosol fire extinguishing substance when ejected is partially converted into the kinetic energy of the rotation of the gas diverter disk (6), thereby reducing the ejection velocity of the aerosol fire extinguishing substance;

S3: When the gas diverter plate (6) rotates, it also cuts and disperses the aerosol fire extinguishing material, causing it to spread out in advance, effectively reducing the temperature of the nozzle (5) area, and preventing the flame at the nozzle (5) from spraying out;

S4: The aerosol fire extinguishing substance diffused by the rotation of the gas distribution plate (6) performs the fire extinguishing process.