Miniature gas fire extinguisher and application

Abstract

The invention belongs to the technical field of fire fighting, and discloses a miniature gas fire extinguisher and application, the miniature gas fire extinguisher comprises a gas fire extinguishing agent, a rigid container, a low-melting-point material release hole, a self-heating gas production material layer and a moisture-proof sealing material layer; the gas extinguishing agent is packaged in a rigid container, a plurality of low-melting-point material release holes are formed in the surface of the rigid container, and the surface of the rigid container is sequentially covered with a self-heating gas production material layer and a damp-proof sealing material layer from inside to outside. The miniature gas fire extinguisher can be directly used for fire extinguishing of miniature spaces (a battery box, an electric appliance cabinet, an electric appliance box, a socket, a cable groove, a file cabinet, an air conditioner cabinet and an engine compartment).

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fire fighting, and particularly relates to a micro gas fire extinguisher and application. BACKGROUND

[0002] Traditional fire fighting devices are not suitable for fire fighting in micro spaces (such as battery boxes, electrical appliance cabinets, electrical appliance boxes, sockets, cable slots, file cabinets, air conditioner cabinets, engine compartments, etc.), and there is an urgent need to develop micro fire extinguishing devices.

[0003] Patent CN202411585701.6 discloses a self-induction fire extinguishing material, a fire extinguishing rope and application, which is based on a perfluorohexanone microcapsule fire extinguishing rope technology, but this method has the problems of complicated microcapsule synthesis process and low fire extinguishing agent loading in the fire extinguishing rope; patent CN202222641240.2 discloses a tubular fire extinguishing rope structure, the pipe body is a polyethylene pipe or a nylon pipe, the pipe two ends are sealed with flexible glue, and the pipe is filled with gaseous fire extinguishing agent, but the release of the fire extinguishing agent in this method depends on the rupture of the pipe body, and is only suitable for low-boiling-point fire extinguishing agents, and cannot form fire extinguishing agent spraying and atomization effects for high-boiling-point fire extinguishing agents; patent CN202323551960.0 discloses a perfluorohexanone fire extinguishing device, which is a fire extinguishing device comprising an inner and outer shell, and the aerosol agent in the inner shell pushes the perfluorohexanone in the outer shell to be sprayed from the nozzle by releasing a large amount of gas, which can avoid the use of high-pressure driving gas, but this method cannot avoid the reaction between the high-temperature gas released by the aerosol and the perfluorohexanone fire extinguishing agent, thereby affecting the fire extinguishing effect, and in addition, this method can only be used for total flooding fire extinguishing and cannot realize precise spraying of fire extinguishing agent.

[0004] Therefore, there is an urgent need to develop a micro gas fire extinguisher that can precisely extinguish fire in micro spaces. SUMMARY

[0005] In view of this, in order to solve the above problems, the purpose of the present application is to provide a micro gas fire extinguisher and application.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: The first purpose of the present application is to provide a micro gas fire extinguisher, which comprises a gaseous fire extinguishing agent, a rigid container, a low-melting-point material release hole, a self-heating gas-producing material layer and a moisture-proof sealing material layer, wherein The gaseous fire extinguishing agent is packaged in the rigid container, and the surface of the rigid container is provided with a plurality of low-melting-point material release holes; The surface of the rigid container is sequentially covered with a self-heating gas-producing material layer and a moisture-proof sealing material layer from the inside to the outside.

[0007] Preferably, the gas extinguishing agent is at least one of halogenated hydrocarbon extinguishing agent, inert gas extinguishing agent; the halogenated hydrocarbon extinguishing agent is at least one of heptafluoropropane, hexafluoropropane, trifluoroiodomethane, perfluoroheptanone, perfluorohexanone, perfluoropentanone, perfluorobutanone, 1,1,1,4,4,4-hexafluoro-2-butene, 1,1,1,3-tetrafluoropropene, 1-chloro-3,3,3-trifluoropropene, 2-bromo-3,3,3-trifluoropropene, thermal aerosol extinguishing agent; the inert gas extinguishing agent is at least one of carbon dioxide, nitrogen, argon.

[0008] Preferably, the material of the rigid container is at least one of stainless steel, iron, aluminum alloy, carbon steel, carbon fiber composite material, the shape of the rigid container is at least one of tubular, spherical, rectangular, and capsule-shaped, and the wall thickness of the rigid container is 0.1-5 mm.

[0009] Preferably, the low-melting-point material in the low-melting-point material release hole is at least one of a low-melting-point alloy and a polymer, the melting point of the low-melting-point material ranges from 70-200℃, the shape of the release hole is an inverted conical structure with a large inner diameter and a small outer diameter, the outer hole size is 0.5-3 mm, and the number of holes is 10-100 per square decimeter.

[0010] Preferably, the self-heating gas generating material is at least one of K-type aerosol extinguishing agent and S-type aerosol extinguishing agent, and the thickness of the self-heating gas generating material layer is 0.1-5 mm.

[0011] Preferably, the moisture-proof sealing material is at least one of a wax-coated cellulose-based film, a plant fat-coated cellulose-based film, a starch-based composite film, and a polylactic acid film, and the thickness of the moisture-proof sealing material layer is 0.2-3 mm.

[0012] Further, the micro gas extinguisher is provided with an extinguishing agent filling valve, which is designed as a one-way valve.

[0013] The second object of the present application is to provide an application of the micro gas extinguisher in the field of fire fighting.

[0014] Specifically, the micro gas extinguisher is used for fire extinguishing in a micro space.

[0015] Further, the extinguisher is directly used for fire extinguishing in a micro space, including a battery box, an electrical appliance cabinet, an electrical appliance box, a socket, a cable slot, a file cabinet, an air conditioner cabinet, and an engine compartment.

[0016] Compared with the prior art, the method has the following beneficial effects: (1) The micro gas fire extinguisher in the application is provided with self-heating gas generating material outside the rigid container. After the self-heating gas generating material is triggered by fire heating, the self-heating gas generating material releases fire extinguishing gas to preliminarily extinguish the fire on one hand, and the heat generated by the self-heating gas generating material can heat the rigid container, so that the gas fire extinguishing agent in the container is heated to generate high pressure, thereby providing power for the release of the gas fire extinguishing agent. More importantly, the high-temperature gas generated after the self-heating gas generating material is triggered does not directly contact the gas fire extinguishing agent in the rigid container, thereby reducing the influence on the fire extinguishing performance of the gas fire extinguishing agent in the rigid container.

[0017] (2) The micro gas fire extinguisher in the application can realize precise fire extinguishing by being provided with a low-melting-point material release hole on the rigid container. When the low-melting-point material release hole encounters high temperature in a fire scene, the low-melting-point material release hole can generate a melting effect, and at the same time, the low-melting-point material release hole can realize the injection of the fire extinguishing agent towards the fire point under the action of the high-pressure gas in the rigid container. In addition, the inverted conical structure design of the low-melting-point material release hole from large to small can make the low-melting-point material have higher pressure bearing capacity in the container, thereby preventing the accidental opening of the release hole during daily storage. Generally, before the low-melting-point material reaches the melting temperature, the greater the pressure in the container, the better the sealing effect of the low-melting-point material due to the design of the conical structure. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application. Embodiment 1

[0019] First, a tubular stainless steel pipe with a diameter of 8 mm, a wall thickness of 2 mm and a length of 20 cm is cut by laser cutting to cut 10 inverted conical release holes with an outer hole size of 2 mm and an inner hole size of 1 mm on the steel pipe; the release holes are sealed by fusing an indium-based alloy (indium 50% + tin 50%) with a melting point of about 117 ℃; then a 1 mm thick S-shaped aerosol fire extinguishing agent layer is covered on the surface of the steel pipe, and a 0.4 mm thick wax impregnated parchment paper is further covered outside the aerosol fire extinguishing agent layer; one-way valves are installed at both ends of the container (the fire extinguishing agent can only enter the rigid container from both ends); finally, the container is filled with perfluorohexone fire extinguishing agent to obtain a micro gas fire extinguisher. Embodiment 2

[0020] First, a spherical aluminum alloy container with a diameter of 5 cm and a wall thickness of 5 mm is cut on the surface of the container by laser cutting to cut 15 inverted conical release holes with an outer hole size of 3 mm and an inner hole size of 1.5 mm; the medium-density polyethylene with a melting point of 120-130℃ is used to seal the release holes by melting; then a layer of k-type aerosol extinguishing agent with a thickness of 1 mm is covered on the surface of the steel pipe, and a layer of polylactic acid film with a thickness of 0.6 mm is covered outside the aerosol extinguishing agent layer; a one-way valve is installed at the top of the container (the extinguishing agent can only enter the rigid container from the outside); finally, carbon dioxide extinguishing agent is filled by pressurization, and the container pressure is 1.6 MPa, to obtain a micro gas extinguisher. Example 3

[0021] First, a rectangular carbon steel container with a length of 10 cm, a width of 8 cm, a height of 2 cm, and a wall thickness of 4 mm is cut on the surface of the container by laser cutting to cut 30 inverted conical release holes with an outer hole size of 2 mm and an inner hole size of 1 mm; a bismuth-based alloy (bismuth 58% + tin 42%) with a melting point of about 138℃ is used to seal the release holes by melting; then a layer of s-type aerosol extinguishing agent with a thickness of 2 mm is covered on the surface of the container, and a layer of starch-polyvinyl alcohol blend film with a thickness of 0.5 mm is covered outside the aerosol extinguishing agent layer; a one-way valve is installed at the narrow end of the container (the extinguishing agent can only enter the rigid container from the outside); finally, hexafluoropropane extinguishing agent is filled by pressurized liquefaction to obtain a micro gas extinguisher.

[0022] Comparative Example 1 is compared with Example 1 to investigate the effect of not setting inverted conical release holes: First, a tubular stainless steel pipe with a diameter of 8 mm, a wall thickness of 2 mm, and a length of 20 cm is cut on the steel pipe by laser cutting to cut 10 cylindrical release holes with a hole diameter of 2 mm; an indium-based alloy (indium 50% + tin 50%) with a melting point of about 117℃ is used to seal the release holes by melting; then a layer of S-type aerosol extinguishing agent with a thickness of 1 mm is covered on the surface of the steel pipe, and a layer of wax-impregnated sheepskin paper with a thickness of 0.4 mm is covered outside the aerosol extinguishing agent layer; one-way valves are installed at both ends of the container (the extinguishing agent can only enter the rigid container from both ends); finally, perfluorocyclohexanone extinguishing agent is filled to obtain a micro gas extinguisher without inverted conical release holes.

[0023] Comparative Example 2 is compared with Example 1 to investigate the effect of not using self-heating gas generating materials: First, a tubular stainless steel pipe with a diameter of 8 mm, a wall thickness of 2 mm, and a length of 20 cm is cut by laser cutting to cut 10 inverted conical release holes with a hole size of 2 mm on the steel pipe; an indium-based alloy (indium 50% + tin 50%) with a melting point of about 117°C is sealed by melting to seal the release holes; then a layer of 0.4 mm of waxed sheepskin paper is covered on the surface of the steel pipe; one-way valve valves are installed at both ends of the container (the extinguishing agent can only enter the rigid container from both ends); finally, the perfluorocyclohexanone extinguishing agent is filled to obtain a micro gas extinguisher without using self-heating gas generating materials.

[0024] Comparative Example 3 is compared with Example 1 to investigate the effect of not using moisture-proof sealing materials: First, a tubular stainless steel pipe with a diameter of 8 mm, a wall thickness of 2 mm, and a length of 20 cm is cut by laser cutting to cut 10 inverted conical release holes with a hole size of 2 mm on the steel pipe; an indium-based alloy (indium 50% + tin 50%) with a melting point of about 117°C is sealed by melting to seal the release holes; then a layer of 0.4 mm of waxed sheepskin paper is covered on the surface of the steel pipe; one-way valve valves are installed at both ends of the container (the extinguishing agent can only enter the rigid container from both ends); finally, the perfluorocyclohexanone extinguishing agent is filled to obtain a micro gas extinguisher without using moisture-proof sealing materials.

[0025] In order to further prove the beneficial effects of the present application and better understand the present application, the properties and application performance of the micro gas extinguisher disclosed in the present application are further illustrated by the following performance tests, but it should not be understood as a limitation of the present application. The method properties obtained by other determination experiments of those skilled in the art according to the above invention content and the application according to the above properties are also considered to fall within the protection scope of the present application.

[0026] Application Example The micro gas extinguishers prepared in Examples 1-3 and Comparative Examples 1-3 are selected (note: the actual number of extinguishers is increased or decreased according to the extinguishing agent content of each extinguisher to make the extinguishing agent dose of each group of experiments the same), and are respectively placed on the top of a 20cm*20cm*20cm micro-sized space simulation test box. A certain length of cable is placed at the bottom of the test box, the cable is ignited, the test box is closed, and whether the flame can be extinguished and the extinguishing time are observed.

[0027] The application example results are shown in Table 1, it can be seen that Examples 1-3 have good extinguishing effect, Comparative Example 1 does not use inverted conical release holes, causing the low melting point material in the release hole to fall off too early, and the extinguishing agent inside the container does not form a jet effect; Comparative Example 2 does not use self-heating gas generating materials, which cannot form a rapid heating and pressure increasing effect on the rigid container, causing the extinguishing agent inside the container to not form a jet effect, thereby failing to achieve the extinguishing effect.

[0028] In addition, the micro gas fire extinguishers prepared in Examples 1-3 and Comparative Examples 1-3 were stored for 30 days under the condition of 60% humidity, and then the fire extinguishing experiments were carried out. Comparative Example 3 showed that the S-type aerosol fire extinguishing agent could not be triggered, indicating that the use of moisture-proof sealing materials could cause the micro gas fire extinguishers to fail.

[0029] Table 1 Application example test results

[0030] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be mutually referred to. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0031] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A miniature gas fire extinguisher, characterized in that, The miniature gas fire extinguisher comprises a gaseous extinguishing agent, a rigid container, a low-melting-point material release port, a self-heating gas-generating material layer, and a moisture-proof sealing material layer; wherein... The gaseous extinguishing agent is encapsulated in the rigid container, and the surface of the rigid container is provided with a plurality of release holes for the low melting point material. The surface of the rigid container is covered from the inside out with a self-heating gas-generating material layer and a moisture-proof sealing material layer.

2. The miniature gas fire extinguisher according to claim 1, characterized in that, The gaseous extinguishing agent is at least one of halogenated hydrocarbon extinguishing agents and inert gas extinguishing agents; wherein... The halogenated hydrocarbon fire extinguishing agent is selected from at least one of the following: heptafluoropropane, hexafluoropropane, trifluoroiodomethane, perfluoroheptanone, perfluorohexanone, perfluoropentanone, perfluorobutanone, 1,1,1,4,4,4-hexafluoro-2-butene, 1,1,1,3-tetrafluoropropene, 1-chloro-3,3,3-trifluoropropene, 2-bromo-3,3,3-trifluoropropene, and thermal aerosol fire extinguishing agents. The inert gas extinguishing agent is selected from at least one of carbon dioxide, nitrogen, and argon.

3. The miniature gas fire extinguisher according to claim 1, characterized in that, The rigid container is made of a material selected from stainless steel, iron, aluminum alloy, carbon steel, or carbon fiber composite material. The rigid container is shaped as a tube, a ball, a rectangle, or a capsule. The rigid container has a wall thickness of 0.1-5 mm.

4. The miniature gas fire extinguisher according to claim 1, characterized in that, The low-melting-point material in the release hole is selected from at least one of low-melting-point alloys and polymers. The melting point of the low-melting-point material is in the range of 70-200℃. The shape of the release hole is an inverted conical structure with a larger inner diameter and a smaller outer diameter. The outer hole size is 0.5-3 mm, and the number of holes is 5-100 per square decimeter.

5. The miniature gas fire extinguisher according to claim 1, characterized in that, The self-heating gas-generating material is selected from at least one of K-type aerosol fire extinguishing agent and S-type aerosol fire extinguishing agent, and the thickness of the self-heating gas-generating material layer is 0.1-5 mm.

6. The miniature gas fire extinguisher according to claim 1, characterized in that, The moisture-proof sealing material is selected from at least one of waxed cellulose-based film, plant lipid cellulose-based film, starch-based composite film, and polylactic acid film, and the thickness of the moisture-proof sealing material layer is 0.2-3 mm.

7. The miniature gas fire extinguisher according to any one of claims 1-6, characterized in that, The miniature gas fire extinguisher is equipped with a fire extinguishing agent filling valve, which is a one-way valve design.

8. The application of a miniature gas fire extinguisher as described in any one of claims 1-7 in the field of fire protection.

9. The application according to claim 8, characterized in that, The miniature gas fire extinguisher is used directly for extinguishing fires in small spaces, including one of the following: battery box, electrical cabinet, electrical box, socket, cable tray, filing cabinet, air conditioning cabinet, and engine compartment.

Images