CN114534635A - Gas generator for non-pressure storage type dry powder fire extinguisher - Google Patents
Gas generator for non-pressure storage type dry powder fire extinguisher Download PDFInfo
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- CN114534635A CN114534635A CN202210178389.3A CN202210178389A CN114534635A CN 114534635 A CN114534635 A CN 114534635A CN 202210178389 A CN202210178389 A CN 202210178389A CN 114534635 A CN114534635 A CN 114534635A
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- cooler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/02—Portable extinguishers which are permanently pressurised or pressurised immediately before use with pressure gas produced by chemicals
- A62C13/22—Portable extinguishers which are permanently pressurised or pressurised immediately before use with pressure gas produced by chemicals with incendiary substances producing pressure gas
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/76—Details or accessories
Abstract
The invention provides a gas generator for a non-pressure storage type dry powder fire extinguisher, which comprises an igniter, a gas generating agent, a large-aperture filter screen, a small-aperture filter screen, a reactor, a chemical cooler, a chemical coolant, a physical cooler, a physical coolant, a shell and a packaging cover. Wherein the reactor is filled with low molecular compound gas generating agent, such as 40-50% nitroguanidine, 20-30% strontium nitrate, 20-30% phase stable ammonium nitrate, 3-4% silicon dioxide, 1-2% phenolic resin or other types of gas generating agent. The chemical cooler is filled with granular calcium carbonate. The physical cooler is filled with 90-95% of spherical aluminum oxide and 5-10% of spherical silicon dioxide. The device has the advantages of compact structure, convenient installation and wide application range.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a gas generator for a non-pressure storage type dry powder fire extinguisher.
Background
At present, most of gas generants in non-pressure storage type dry powder extinguishers in the market mainly adopt homogeneous gas generants such as double-base gas generants, modified double-base gas generants, multi-base gas generants and the like, and the gas generants have the following characteristics:
the gas generating agent has moderate combustion speed, overhigh reaction temperature and overhigh slag forming rate; high-temperature and high-pressure gas and residues generated by the reaction are difficult to be effectively cooled and filtered, and are mixed with the superfine dry powder extinguishing agent to be sprayed out, so that fire safety hazards are formed in areas without fire hazards in the protection area. Under the same weight, the gas production rate of the gas generating agent is less than that of the heterogeneous gas generating agent; in the application process, the gas generating agent needs to be matched with a gas generator with large loading capacity, so that the fire extinguishing device is large in size. At present, a gas generator in a non-pressure storage type dry powder fire extinguisher has the problems that the combustion process is difficult to control, high-temperature and high-pressure gas is difficult to cool to a proper temperature and the like.
Disclosure of Invention
The invention aims to provide a gas generator for a non-pressure storage type dry powder fire extinguisher, which solves the problems of difficult product filtration, difficult high-temperature gas cooling and poor combustion stability of a gas generating agent by changing the sizes and the positions of a multistage cooling and filtering device and a reactor vent hole.
The invention adopts the following technical scheme for realizing the purpose:
a gas generator for a non-stored pressure dry chemical fire extinguisher comprising: igniter, packaging cover, reactor, chemical cooler, physical cooler and shell.
The chemical cooler is filled with chemical coolant particle-packed calcium carbonate.
And 90-95% of spherical alumina and 5-10% of spherical silicon dioxide are filled in the physical cooler, wherein the spherical alumina is used as a physical coolant, and the spherical silicon dioxide is used as a drying agent.
The chemical cooler and the physical cooler are both formed by pressing high-density filter screens made of explosion-proof carbon steel materials and can be recycled.
The chemical cooler and the physical cooler are mounted in the housing in a nested manner.
The igniter, comprising: fire-resistant fiber plastic cover, annular insulating plastic sleeve, tube shell, plastic cladding insulating layer, glass electrode plug, bridgewire, ignition agent and ignition agent.
The fire-fighting pipe is characterized in that arc-shaped fire transfer holes are distributed in the pipe shell and are sealed by a combustible corrosion-resistant plastic sealing film, and the pipe shell is completely coated by the plastic coating insulating layer.
The igniter is controlled by a manual or micro-control chip, an ignition signal is transferred to the igniter through the manual or micro-control chip, and the igniter ignites the gas generating agent.
The glass electrode plug adopts a glass sintering process, and the joint of the annular insulating plastic sleeve and the tube shell and the joint of the fireproof fiber plastic sleeve and the tube shell are welded by adopting a laser welding technology.
The encapsulation cover includes: annular groove, ignition utensil mounting hole, internal thread, external screw thread.
The igniter is installed on the packaging cover through the igniter installation hole, and high-temperature-resistant sealant is filled between the igniter and the annular groove for sealing.
The reactor is connected with the packaging cover through the internal thread, and the shell is connected with the packaging cover through the external thread.
The reactor, comprising: a large-aperture filter screen, a small-aperture filter screen, a reactor external thread, a small-aperture vent hole and a large-aperture vent hole.
The large-aperture filter screen and the small-aperture filter screen are respectively formed by pressing the large-aperture filter screen and the small-aperture filter screen which are made of explosion-proof carbon steel.
The reactor is uniformly distributed with small-aperture vent holes and large-aperture vent holes which are different in size, and the small-aperture vent holes and the large-aperture vent holes are sealed by inflammable corrosion-resistant plastic sealing films.
The large-aperture filter screen and the small-aperture filter screen are arranged in the reaction in a nesting mode.
Circular vent holes with the same size are uniformly distributed on the shell, and the vent holes are sealed by a combustible corrosion-resistant plastic sealing film.
The shell is of a cylindrical structure and is in a flange structure, the shell is connected with a tank filled with the superfine dry powder extinguishing agent through bolts, and the joint is sealed by a red copper high-temperature high-pressure sealing gasket.
Further, the reactorThe reactor is filled with a low-molecular compound gas generating agent, the gas generating agent is preferably a non-sodium azide gas generating agent taking nitroguanidine as a gas generating agent, and the agent is mixed and pressed to form a medicine column which is filled in the reactor. The ignition agent in the ignition device is Stefin lead acid, and the ignition agent is Pb3O4And Sb2S3The composition of the medicament.
Further, the chemical cooler is internally filled with a chemical coolant of granular calcium carbonate; and 90-95% of spherical alumina and 5-10% of spherical silicon dioxide are filled in the physical cooler, wherein the spherical alumina is used as a physical coolant, and the spherical silicon dioxide is used as a drying agent.
Furthermore, the reactor, the large-aperture filter screen, the small-aperture filter screen, the chemical cooler and the physical cooler are arranged in a nested structure. The reactor can be loaded with tens of grams to thousands of grams, and the gas production is tens of liters to hundreds of liters.
The working mode is that an ignition signal is transmitted to the igniter through a manual control or micro-control chip, the igniter ignites a gas generating agent, the ignited gas generating agent is subjected to surface combustion, and high-temperature and high-pressure gas generated by combustion firstly sequentially passes through the large-aperture filter screen and the small-aperture filter screen in the reactor to preliminarily filter combustion products of the gas generating agent. Gas loops through reactor exhaust hole, one deck high density filter screen entering in the chemical cooler subsequently, is heated through chemical coolant and decomposes, has reduced gas temperature to a great extent, and chemical coolant decomposes and produces partial gas simultaneously, has increased gas generation volume. And finally, the gas sequentially enters the physical cooler through two layers of high-density filter screens, the high-temperature gas is further cooled through heat absorption of a physical coolant, residues in reaction products can be further filtered, and finally the purer low-temperature gas is obtained through one layer of high-density filter screen. The physical cooler and the chemical cooler in the gas generator can effectively buffer the internal pressure of the device while cooling the filtered product.
Advantageous effects
(1) In the invention, the ignition tool is provided with the arc-shaped fire transfer hole at the position for filling the ignition agent, so that the gas generating agent can be quickly ignited. The periphery of the igniter is coated with an insulating refractory plastic layer, and the inside of the igniter is welded with a glass electrode plug, so that the device has a good insulating anti-static effect.
(2) The invention can react in an oxygen-free closed environment by using the gas generating agent with the improved formula, has large gas production rate and high volume efficiency, and is easy to realize the miniaturization and the light weight of the fire extinguishing device.
(3) In the invention, the reactor is provided with circular exhaust holes with different apertures and reasonable distribution. When the gas generating agent starts to burn and reaches a certain pressure, the large-aperture exhaust hole sealing film is firstly broken; when the pressure in the reactor reaches a certain value, if the pressure is continuously increased, the sealing membrane of the small-aperture vent hole is broken, so that the pressure in the reactor is reduced, and the stable combustion of the medicament at a certain speed is ensured.
(4) In the invention, the chemical coolant in the chemical cooler generates partial gas while being decomposed in an endothermic manner, so that the gas generation amount is increased. The physical cooler is filled with a small amount of spherical silica, which acts as a desiccant.
(5) In the working process of the gas generator, the product is cooled and filtered for many times, so that relatively pure low-temperature gas can be obtained. The physical cooler and the chemical cooler in the gas generator can effectively buffer the internal pressure of the device while cooling and filtering products, so that the medicament can be stably combusted at a certain speed.
(6) In the invention, the arc-shaped fire transfer hole of the igniter, the circular exhaust holes (large-aperture exhaust hole and small-aperture exhaust hole) of the reactor and the circular exhaust holes of the shell are all sealed by the inflammable corrosion-resistant plastic sealing film, thereby playing the roles of sealing and damp-proofing.
(7) In the invention, the large-aperture filter screen, the small-aperture filter screen, the reactor, the chemical cooler, the physical cooler, the shell and the packaging cover are all made of explosion-proof carbon steel materials and are all reusable structures, so that the utilization rate of the device is improved and the production cost is reduced; the reactor is connected with the packaging cover and the packaging cover is connected with the shell through threads. The gas generator component adopts a modular design, the whole device has good sealing performance, convenient and fast installation and safe and reliable operation.
(8) In the invention, the igniter is provided with an annular bayonet, the packaging cover is provided with an annular groove, the igniter is arranged at the annular groove of the packaging cover, and high-temperature-resistant sealant is filled between the annular bayonet of the igniter and the packaging cover to play a role in sealing.
Drawings
FIG. 1 is a schematic diagram of the overall apparatus of the present invention;
FIG. 2 is a cross-sectional view of the integrated device of the present invention;
FIG. 3 is a schematic diagram of the ignition device of the present invention;
FIG. 4 is a cross-sectional view of the igniter of the invention;
FIG. 5 is a schematic diagram of the outer side structure of the package cover of the present invention;
FIG. 6 is a schematic view of the inside structure of the package cover of the present invention;
FIG. 7 is a cross-sectional view of the closure cap of the present invention;
FIG. 8 is a schematic diagram of the chemical cooler and physical cooler of the present invention;
FIG. 9 is a schematic diagram of the reactor configuration of the present invention;
FIG. 10 is a schematic view of the structure of the filter screen inside the reactor of the present invention.
In the figure: 1-igniter, 11-fire-resistant fiber plastic cover, 12-annular insulating plastic sleeve, 13-tube shell, 14-plastic cladding insulating layer, 15-glass electrode plug, 16-bridge wire, 17-ignition agent, 18-ignition agent and 19-arc-shaped fire transfer hole; 2-packaging cover, 21-annular groove, 22-igniter mounting hole, 23-internal thread and 24-external thread; 3-reactor, 31-large aperture filter screen, 32-small aperture filter screen, 33-reactor external screw thread, 34-small aperture vent hole, 35-large aperture vent hole; 4-a chemical cooler; 5-a physical cooler; 6-shell, 61-shell internal thread, 62-flange plate, 63-exhaust hole.
Detailed Description
The invention is further illustrated by the following specific examples.
Referring to the drawings, a gas generator for a non-pressure storage type dry chemical fire extinguisher comprises: the device comprises an igniter (1), a packaging cover (2), a reactor (3), a chemical cooler (4), a physical cooler (5) and a shell (6).
Specifically, an igniter (1) for a gas generator of a non-pressure storage type dry powder fire extinguisher, comprising: the fire-resistant fiber plastic cover (11), the annular insulating plastic sleeve (12), the tube shell (13), the plastic cladding insulating layer (14), the glass electrode plug (15), the bridge wire (16), the ignition agent (17), the ignition agent (18) and the arc-shaped ignition hole (19); the pipe shell (13) is of a cylindrical structure, is made of explosion-proof carbon steel materials and is pressed by an oil press, and the shell is guaranteed to have enough strength; the outer layer of the tube shell (13) is covered with a plastic-coated insulating layer (14); the glass electrode plug (15) adopts a glass sintering process, the joint of the annular insulating plastic sleeve (12) and the tube shell (13) and the joint of the fireproof fiber plastic sleeve (12) and the tube shell (13) adopt a laser welding technology, and the application of the glass sintering process and the laser welding technology can completely isolate the internal medicament of the igniter (1) from the outside; the ignition agent (17) in the ignition tool (1) adopts Stephenic acid lead with good flame sensitivity and low mechanical sensitivity, and the ignition agent (18) in the ignition tool (1) adopts a classic delay agent formula, and the composition of the ignition agent is Pb3O4Si 75:25, with the addition of 15% Sb2S3(ii) a The bridge wire (16) in the igniter (1) is made of 6J20 NiCr resistance alloy wire with the specification of phi 0.028 mm. The arc-shaped fire transfer holes (19) are sealed by a combustible corrosion-resistant plastic sealing film.
Concretely, a packaging cover (2) of a gas generator for a non-pressure storage type dry powder fire extinguisher comprises an annular groove (21), an igniter mounting hole (22), internal threads (23) and external threads (24); the packaging cover (2) is made of an explosion-proof carbon steel material through pressing by an oil press, the packaging cover is turned by a lathe to obtain an annular groove (21), an internal thread (23) and an external thread (24), and the packaging cover (2) is punched by a punching machine to obtain an igniter mounting hole (22).
Specifically, a reactor (3) of a gas generator for a non-pressure storage type dry powder fire extinguisher, which comprises a large-aperture filter screen (31), a small-aperture filter screen (32), a reactor external thread (33), a small-aperture exhaust hole (34) and a large-aperture exhaust hole (35); the reactor (3) is made of an explosion-proof carbon steel material through pressing by an oil press, and the reactor (3) is turned by a lathe and punched by a punching machine to obtain a reactor external thread (33), a small-aperture vent hole (34) and a large-aperture vent hole (35); the large-aperture filter screen (31) and the small-aperture filter screen (32) are both cylindrical structures and are respectively formed by pressing a 60-mesh carbon steel filter screen and a 24-mesh carbon steel filter screen; the small-aperture vent hole (34) and the large-aperture vent hole (35) are both sealed by flammable and corrosion-resistant plastic sealing films; the small-aperture exhaust hole (34) and the large-aperture exhaust hole (35) in the reactor (3) can play a role in maintaining the internal pressure of the reactor (3) during working; when the gas generating agent starts to burn and reaches a certain pressure, the sealing film of the large-aperture vent hole (35) is firstly broken; when the pressure in the reactor (3) reaches a certain value, if the pressure is continuously increased, the sealing film of the small-aperture vent hole (34) is broken, so that the pressure in the reactor (3) is reduced, and the stable combustion of the medicament at a certain speed is ensured.
Specifically, a chemical cooler (4) that is used for non-pressure storage formula dry powder fire extinguisher's gas generator, chemical cooler (4) adopt the high density filter screen of explosion-proof carbon steel material, form through punching machine suppression, laser welding, the chemical coolant that loads in chemical cooler (4) is grain dress calcium carbonate, in gas generator working process, calcium carbonate is heated and is decomposed, the gas temperature has been reduced to a great extent, calcium carbonate decomposes simultaneously and produces carbon dioxide gas, gas generation volume has been increased.
The physical cooler (5) is formed by pressing and laser welding a high-density filter screen made of explosion-proof carbon steel through a punching machine, and 90-95% of spherical aluminum oxide and 5-10% of spherical silicon dioxide are filled in the physical cooler (5), wherein the spherical aluminum oxide is used as a physical coolant, and the spherical silicon dioxide is used as a drying agent. When the gas generator works, gas sequentially enters the physical cooler (5) through the two layers of high-density filter screens, high-temperature gas is further cooled through heat absorption of a physical coolant aluminum oxide, residues in reaction products can be further filtered, and finally pure low-temperature gas is obtained through one layer of high-density filter screen again.
Specifically, a shell (6) of a gas generator for a non-pressure storage type dry powder fire extinguisher, wherein the shell (6) is of a cylindrical structure and is connected with a tank filled with superfine dry powder fire extinguishing agent through a flange structure by bolts, and in order to ensure the integral air tightness of the gas generator, the joint is sealed by a red copper high-temperature high-pressure sealing gasket; the shell (6) is made of explosion-proof carbon steel material. The shell (6) is turned by a lathe and punched by a punching machine to obtain shell internal threads (61) and exhaust holes (63) which are uniformly distributed. The exhaust holes (63) are sealed by a combustible corrosion-resistant plastic sealing film.
Further, the gas generator for the non-pressure storage type dry powder fire extinguisher is installed in the sequence that firstly a large-aperture filter screen (31) and a small-aperture filter screen (32) are sequentially installed in a reactor (5) in a nesting mode; secondly, placing the gas generating agent pressed into the explosive column into a reactor (3), and connecting the reactor (3) with a packaging cover (2) through threads; then, the physical cooler (5) and the chemical cooler (4) are arranged in the shell (6) in a nesting mode, the packaging cover (2) connected with the reactor (3) is connected with the shell (6) in a threaded mode, and the threaded connection is filled with high-temperature-resistant sealant for sealing; and finally, the igniter (1) is installed on the packaging cover (2) through the igniter installation hole (22), and the annular groove (21) is filled with high-temperature-resistant sealant for sealing. After the gas generator is assembled, the gas generator is connected with a tank filled with the superfine dry powder extinguishing agent through a flange plate (62) on the shell (6).
Further, in the embodiment, the gas generating agent is a non-sodium azide gas generating agent, and the non-sodium azide gas generating agent comprises 40-50% of nitroguanidine, 20-30% of strontium nitrate, 20-30% of phase-stable ammonium nitrate, 3-4% of silicon dioxide and 1-2% of phenolic resin. Wherein nitroguanidine is used as a gas generating agent, strontium nitrate and phase-stable ammonium nitrate are used as oxidizing agents, silicon dioxide is used as a slag forming agent, and phenolic resin is used as a bonding agent. The gas generated by the gas generating agent is non-toxic and non-corrosive, and meets the atmospheric safety standard. The nitroguanidine has no moisture absorption, low explosion temperature, 0 percent of impact sensitivity and friction sensitivity, contains a plurality of carbon-carbon single bonds, carbon-nitrogen single bonds and nitrogen-carbon double bonds in molecules, and has high molecular energy. The nitroguanidine has good stability, low hydrogen content in molecules and low water vapor content in gas products, is beneficial to spraying the superfine dry powder extinguishing agent from spray holes of the fire extinguisher, reduces the residual quantity of the superfine dry powder extinguishing agent in a tank body of the fire extinguishing tank, and prevents the spray holes from being blocked.
Further, in the present embodiment, the entire gas generator is sealed and can be normally used in extreme environments.
Furthermore, in the embodiment, the large-aperture filter screen (31), the small-aperture filter screen (32), the reactor (3), the chemical cooler (4), the physical cooler (5), the shell (6) and the packaging cover (2) are reusable structures; the device adopts the modularized design, and convenient the dismantlement is with the inside reaction residue clean up of device after using at every turn, changes gas generating agent and can used repeatedly.
Further, in this embodiment, the size of the gas generator, the amount of coolant charge, and the amount of gas generator charge can be determined based on the amount of gas required to eject a certain weight of the ultra-fine dry powder extinguishing agent.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (12)
1. A gas generator for a non-stored pressure dry chemical fire extinguisher, comprising: the device comprises an igniter (1), a packaging cover (2), a reactor (3), a chemical cooler (4), a physical cooler (5) and a shell (6);
the igniter (1) comprising: the fire-resistant fiber plastic cover (11), the annular insulating plastic sleeve (12), the tube shell (13), the plastic cladding insulating layer (14), the glass electrode plug (15), the bridge wire (16), the ignition agent (17), the priming agent (18) and the arc-shaped fire transfer hole (19);
the packaging cover (2) comprises an annular groove (21), an igniter mounting hole (22), internal threads (23) and external threads (24);
the reactor (3) comprises a large-aperture filter screen (31), a small-aperture filter screen (32), a reactor external thread (33), a small-aperture vent hole (34) and a large-aperture vent hole (35);
the shell (6) comprises shell internal threads (61), a flange plate (62) and exhaust holes (63).
2. The gas generator of claim 1, wherein the gas generated by the stable combustion of the low molecular compound gas generating agent is used, the gas is filled into a tank filled with the superfine dry powder fire extinguishing agent, the pressure in the tank is increased, so that the superfine dry powder fire extinguishing agent is sprayed to the fire occurrence area through a spraying device to form a uniformly distributed cold aerosol system, thereby achieving the purpose of effective fire extinguishing.
3. The gas generator for a non-pressure storage type dry powder fire extinguisher according to claim 1, wherein the reactor (3), the large aperture screen (31), the small aperture screen (32), the chemical cooler (4), and the physical cooler (5) are arranged in a nested structure. The loading capacity of the reactor (3) can reach tens grams to thousands grams, and the gas production is tens liters to hundreds liters.
4. The gas generator for a non-pressure storage type dry powder fire extinguisher according to claim 1, wherein the tube case (13) in the igniter (1), the housing cap (2), the reactor (3), the chemical cooler (4), the physical cooler (5), and the housing (6) are made of explosion-proof carbon steel material. Wherein, the packaging cover (2) is connected with the reactor (3) and the packaging cover (3) is connected with the shell (6) through screw threads.
5. The gas generator for the non-pressure-storage type dry powder fire extinguisher according to claim 1, characterized in that the reactor (3) is filled with a low-molecular compound gas generating agent, and the gas generating agent is selected from non-sodium azide gas generating agents using nitroguanidine as a gas generating agent. The ignition medicament (17) in the ignition tool (1) is Stefin lead acid, and the ignition medicament (18) is Pb3O4And Sb2S3The composition of the medicament.
6. The gas generator for a non-pressure-storing type dry powder fire extinguisher according to claim 1, wherein the chemical coolant charged in the chemical cooler (4) is granular calcium carbonate.
7. The gas generator for a non-pressure storage type dry powder fire extinguisher according to claim 1, wherein the physical coolant filled in the physical cooler (5) is 90-95% of spherical alumina and 5-10% of spherical silica.
8. The gas generator for a non-pressure storage type dry chemical fire extinguisher according to claim 1, wherein the chemical cooler (4) and the physical cooler (5) are made of explosion-proof carbon steel material by pressing with a high-density filter screen, and are recyclable.
9. The gas generator for the non-pressure storage type dry powder fire extinguisher according to claim 1, wherein the housing (6) is connected with the tank filled with the superfine dry powder fire extinguishing agent through the flange (62), and the joint of the flange (62) and the tank is sealed through a red copper high-temperature high-pressure sealing gasket. The annular groove (21) in the encapsulation cover (2) is used for placing the igniter (1). And the igniter (1) and the packaging cover (2) are sealed by adopting high-temperature-resistant sealant.
10. The gas generator for a non-pressure-storing type dry powder fire extinguisher according to claim 1, wherein the large-aperture screen (31) and the small-aperture screen (32), and the chemical cooler (4) and the physical cooler (5) are all nested.
11. The gas generator for a non-stored pressure type dry powder fire extinguisher according to claim 1, wherein the small-diameter exhaust holes (34) and the large-diameter exhaust holes (35) are uniformly distributed on the side and bottom surfaces of the reactor (3), the exhaust holes (63) are uniformly distributed on the side and bottom surfaces of the housing (6), and the igniter (1) is provided with the uniformly distributed arc type fire transfer holes (19) at the position where the ignition agent (18) is filled; the exhaust hole (63), the small-aperture exhaust hole (34), the large-aperture exhaust hole (35) and the arc-shaped fire transmission hole (19) are sealed by a combustible corrosion-resistant plastic sealing film.
12. The gas generator for the non-pressure-storing type dry powder fire extinguisher according to claim 1, wherein the sealing cover (2) and the housing (6) are formed by an integral molding process, and the large-aperture filter screen (31) and the small-aperture filter screen (32) are respectively formed by pressing a large-aperture filter screen and a small-aperture filter screen made of explosion-proof carbon steel.
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| CN202210178389.3A CN114534635A (en) | 2022-02-25 | 2022-02-25 | Gas generator for non-pressure storage type dry powder fire extinguisher |
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| CN202210178389.3A CN114534635A (en) | 2022-02-25 | 2022-02-25 | Gas generator for non-pressure storage type dry powder fire extinguisher |
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