EP3520863A1 - Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable - Google Patents

Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable Download PDF

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Publication number
EP3520863A1
EP3520863A1 EP18154597.1A EP18154597A EP3520863A1 EP 3520863 A1 EP3520863 A1 EP 3520863A1 EP 18154597 A EP18154597 A EP 18154597A EP 3520863 A1 EP3520863 A1 EP 3520863A1
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EP
European Patent Office
Prior art keywords
compressed air
laval nozzle
valve
water
gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18154597.1A
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German (de)
English (en)
Inventor
Heinz Emmler
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP18154597.1A priority Critical patent/EP3520863A1/fr
Publication of EP3520863A1 publication Critical patent/EP3520863A1/fr
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C27/00—Fire-fighting land vehicles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
    • A62C3/0207—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires by blowing air or gas currents with or without dispersion of fire extinguishing agents; Apparatus therefor, e.g. fans
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/005—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 mounted on vehicles or designed to apply a liquid on a very large surface, e.g. on the road, on the surface of large containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0075—Nozzle arrangements in gas streams

Definitions

  • the invention relates to a method for extinguishing surface fires, in particular forest fires. Furthermore, the invention relates to a Venturi Laval nozzle and a quick-closing valve for use in the method and a vehicle for the application of the method.
  • water which extracts energy from a fire by evaporation and thus extinguishes the flames and the embers.
  • the effect is based on the cooling effect, which includes the cooling of the flame itself and the wetting / cooling of the fuel surface.
  • the cooling effect is based on the high heat capacity or the high heat of evaporation of water.
  • the water vapor produced during the evaporation additionally causes an oxygen displacement and a dilution of the combustible gases.
  • the heat radiation is reduced, which slows down the pyrolysis process.
  • the basis of the invention is the fact that candles can be blown out by mouth. For larger fires so only the amount of air, the air pressure and the air speed must be increased. These three physical quantities must be matched to the fire to be combated. Due to the high pressure compressed air and the multitude of successive blasts of compressed air from the compressed air cannon, the source of the fire can be attacked from its outer periphery. As a result of the high pressure, the individual blasts of compressed air are ejected from the compressed air gun at high speed, so that the blast of compressed air, which initially forms a spherical volume of compressed air, can be fired over a long distance in the direction of the fire.
  • the compressed air is preferably accelerated in the compressed air gun in such a way that it leaves it at supersonic speed.
  • the compressed air is preferably provided under a pressure between 200 and 365 bar.
  • At least three compressed air guns are used, with which a plurality of compressed air blast sequences are fired, each shot in each sequence each compressed air gun shoots a burst of compressed air in each case. That is, a sequence consists of at least three bursts of compressed air delivered one after the other and after the last compressed air cannon is inserted was, a new sequence is started, in which again with the first compressed air gun, a first blast of compressed air is fired.
  • the number of compressed air surges in a sequence corresponds to the number of compressed air guns used.
  • the compressed air can be mixed in the compressed air gun water contained in the compressed air blast as water mist.
  • a water mist water vapor
  • a water mist water vapor
  • a combined Venturi Laval nozzle is provided in the compressed air gun, in which the compressed air is accelerated and mixed with water.
  • the compressed air gun can be preceded by a quick-closing valve.
  • This quick-closing valve only a smaller amount of compressed air is fed into the Venturi Laval nozzle.
  • the opening time of the quick-closing valve is in the range of hundredths of a second.
  • the break between individual bursts of compressed air is much longer than the opening time of the valve and is preferably in the second range.
  • the at least one compressed air gun is preferably arranged on a freely movable in space boom of an off-road vehicle.
  • the compressed air can be made available via at least one compressed air tank, which is connected to at least one compressor.
  • the water can be provided from a water tank.
  • the at least one compressed air tank, the compressor, or the compressed air cannon associated quick-closing valves and / or the water tank can also be placed on the all-terrain vehicle, so that a fire truck is provided, which can be transported to the fire and there brought into use.
  • This vehicle for the application of the method is characterized by a driver's cab, a semi-trailer and a boom, which is telescopic and can be moved freely in space with its free end.
  • Such vehicles are known and are e.g. used in forestry as a sudeterrorism. They are mainly four-wheel drive for the tractor and the semi-trailer equipped.
  • a gripper is arranged with which, for example, tree trunks can be grasped and inserted into the semi-trailer.
  • At least one compressed-air tank and a compressor associated therewith, as well as a water tank, are provided on the vehicle according to the invention on the semi-trailer.
  • a plate is arranged, on which the at least one compressed air gun, the associated fast-closing valve and at least one camera, preferably a thermal imaging camera, are arranged.
  • the fire fighting can be carried out to a distance of 75 to 100 m in the ideal case with little wind, low Lucasverwirbelungen and temperatures below 40 ° C with the inventive method.
  • the air reaches its target at a speed of about 700 m / s. This speed and the amount of air are able to extinguish the fire, as it suddenly cools the flames and stops the normal supply of oxygen. Due to the different environmental conditions, air speed and air quantity must be determined empirically.
  • the compressor is preferably chosen so that a high compressed air power of 40 to 500 bar is adjustable and an air flow of up to 3,500 l / min can be promoted.
  • the compressor, compressed air tank, all lines, fittings, control and regulating valves as well as the safety-related equipment and measuring instruments must be designed for the maximum pressure of 500 bar.
  • further hand-fire lances can be provided, which are also operated with compressed air and can be operated by running next to the vehicle firefighters.
  • the structural design of the fire extinguishing lance corresponds to the design of the compressed air gun.
  • the fire-fighting vehicle 300 can be used as a starting point provided for forestry all-wheel-drive rear-view vehicle, which is rebuilt according to its use.
  • This fire fighting vehicle 300 consists of the driver's cab 310, the adjacent semi-trailer 311 with the superstructure 320 arranged thereon and the boom 312 at its free end (instead of the conventional grapple for repeaters), a plate 307 is attached.
  • the plate 307 can be actuated by the vehicle driver seated in the driver's cab 310 and moved in all directions in space.
  • the superstructure 320 comprises the compressor 314, the compressed air tanks 313, the water tank 315 and, if appropriate, hydraulic units and controls for driving the jib 312 which are not illustrated and explained here.
  • the plate 307 On the plate 307, three compressed air guns 301.1, 301.2, 301.3 and a thermal imaging camera 302, a target camera 303 and a hook 304 are arranged.
  • An angle encoder 306 serves to rotate the plate 307 relative to the cantilever arm 312.1 and to pivot at an angle.
  • the fire can be located by the driver and the target camera 303 of this can pivot the plate 307 so that the compressed air guns 301.1, 301.2, 301.3 a variety of blasts of compressed air in the direction of the fire can be shot.
  • Each compressed air cannon 301.1, 301.2, 301.3 is provided with a Venturi Laval nozzle 100 which communicates with a quick-acting valve 200 which is connected to the compressed air tank or tanks 313.
  • the diesel-powered compressor fills the compressed air tank 313, as well as a defined set pressure drop occurs.
  • the compressed air tank 313 receives a total of about 3,000 l of compressed air at 500 bar.
  • The, or the compressed air tanks 313 are preferably made of stainless steel and are provided with shut-off and pressure control valves not shown here in detail with motor drive.
  • a not shown here manual emergency shut-off valve is mounted at the output of the compressed air tank 313 .
  • an air distributor also not shown, the compressed air is distributed to the individual compressed air guns 301.1, 301.2, 301.3.
  • each compressed air gun 301.1, 301.2, 301.3 may also be provided to provide such a quick-closing valve 200 for a plurality of compressed-air guns 301.1, 301.2, 301.3, which then provide one between the quick-acting valve 200 and the compressed air guns 301.1, 301.2, 301.3 arranged air distributor (not shown) are supplied.
  • chains 316 can be provided on the semi-trailer 311, which can be mounted on the wheels 317 by means of the hook 304 provided on the boom 312 in order to prepare the vehicle for particularly rough terrain. The vehicle is so self-sufficient equipped that it can be brought to a fire and used there. If necessary, the chains 316 must be carried along on a support vehicle if the weight of the fire truck 300 becomes too high.
  • the boom 312 can be extended to a height of 10 m.
  • the extended altitude is always known.
  • the distance to the target can be calculated (Pythagoras).
  • the height of the pressure of the air is adjusted. At a shorter distance, the pressure is automatically lowered. At a greater distance, the pressure is automatically increased.
  • the video camera 303 and the thermal imager 302 are provided for fire observation and target detection. The The operator can observe both cameras 302, 202 via monitors and operate the boom 312 accordingly.
  • strong, controllable headlamps may also be attached to the vehicle 300 and / or the panel 307.
  • the operator controls and monitors all functions of the vehicle 300, the boom hydraulic system 312, and the pivot unit (consisting of the plate 307 and a pivot joint) of the compressed air guns 301, the compressor 314, and the various air pressures from the cab 310 out.
  • the cab 310 has monitors and gauges that provide all the data needed to operate the fire truck. In addition, all controls that allow the safe operation of the entire system housed in the cab 310.
  • the driver controls the orientation of the compressed air cannons 301.1, 301.2, 301.3 via the camera 303 or by sight.
  • the cab 310 is equipped with a GPS. It is also soundproofed and air conditioned. On the roof of the cab 310, a flashing beacon and a horn can be mounted.
  • a transport and shelter for the escort team is provided in the structure 320.
  • tools and accessories can consist of chain saws, axes, ropes, spare hoses and nozzles, steel slip, tools, gasoline for the chainsaws, etc.
  • the cab 310 is protected. Left and right of the vehicle 300 five outlets for compressed air can be provided in a distributor.
  • a pull-drum (reel) with electric slip rings and a compressed air coupling can be connected to each outlet a compressed air hose about 25 m long with a hand-extinguishing lance, which is manually operated and corresponds in its construction of the compressed air gun 301.
  • the compressed air from this distributor is intended only for the escort team for extensive control of ground fire and to secure the fire truck 300. It therefore fight on each side of the vehicle max. five firefighters, each with a hand-held compressed air lance with a max. Range of 25 + 5 meters.
  • Each outlet is in front of the hydraulic cutting couplings a pressure gauge complains. Here, the accompanying personnel can read the pressure before starting the fire-fighting work and adjust it if necessary.
  • the fire-extinguishing lances are equipped with a pistol grip, which has buttons for "more pressure” and “less pressure”.
  • a manual selection lever can be used to set whether a continuous pressure or an impulse pressure should be fired.
  • a valve for duration or pulse pressure is opened by means of a trigger provided on the pistol grip.
  • the required electrical control line is vulcanised directly to the necessary hydraulic hose.
  • a compressed air gun 301 which consists essentially of a Venturi Laval nozzle 100, as in FIG. 4 is shown.
  • This Venturi Laval nozzle 100 consists of the front Laval nozzle body 103, which is provided at its one end with an external thread 101 and can be connected thereto with a compressed air line or directly to the quick-connect valve 200 to be described below.
  • the front nozzle body 103 is provided with a central bore into which a nozzle plate 105 is inserted.
  • the nozzle disk 105 is adjoined by a rear laval nozzle body 107, which is provided with a radially encircling flange 107.1.
  • the rear Laval nozzle body 107 is screwed onto the front Laval nozzle body 103 and presses the nozzle disk 105 against the locking pin 104, which prevents rotation of the nozzle disk 105 with respect to the front Laval nozzle body 103.
  • the other end of the rear Laval nozzle body 107 is provided with an external thread 101 to which a muffler 115 can be screwed.
  • the front Laval nozzle body 103 has a bore 108 that narrows from a first diameter D 1 in the flow direction S to a smaller diameter D 2 .
  • the nozzle disk 105 has a central bore with the diameter D 2 and a radial bore 110 for forming a venturi nozzle 110.
  • the nozzle plate 105 can be replaced.
  • the nozzle disks 105 must be used with different sized nozzle bores 116.
  • the rear Laval nozzle body 107 is provided with a nozzle bore 116, which increases in the flow direction S from the small diameter D 2 to a larger diameter D 3 .
  • the radial bore 110 is connected via the hose 112 to the water tank 315 of the vehicle 300.
  • FIG. 5 shows the muffler 115 of a stainless steel tube 5 with a rear cover 13 and a front muffler floor 3, to which an internal thread 1 is attached, via which the muffler 115 can be screwed onto the rear Laval nozzle body 107.
  • Inside the stainless steel tube 5 are centrally around the longitudinal axis L four Verwirbelungsdrähte 8, which are arranged around each other in the front braided and parallel to each other in the rear area and parallel to the longitudinal axis L and open into the chamber 13 formed by the lid. With the Verwirbelungsdrähten 8 ten discs 7 are welded, which are arranged spaced from each other. The discs 7 are also made of stainless steel.
  • the cutting disc 9 forms the boundary between the front and the rear of the muffler 115 and in the region of the blade 9, the swirl wires 8 go from the intertwined situation in the parallel situation and then form air guide wires 12.
  • the cover 13 and the muffler bottom 3 are braced by locking rods 4 and cap nuts 2 to each other.
  • the compressed air entering the muffler 115 in the direction of flow S is in part due to the Verwirbelungsdrähte 8 and the axially spaced discs 8 slides in the wire mesh 6 and passes from there into the annular chamber 10. The majority of the compressed air flows in the flow direction S in Direction of the lid 3.
  • the radial holes in the blade 9 serve as a Venturi nozzle and suck the air in the annular chamber 10 inwards and guide them with the other compressed air in the flow direction S outward in the direction of the lid 13 and then to the outside.
  • To relieve a part of the compressed air can also escape into the wire mesh 11 and then passes into the rear area via the annular chamber 10, where it is then discharged by means of the baffles in the lid 3 to the outside.
  • the Venturi Laval nozzle 100 upstream is a in FIG. 3 illustrated quick-closing valve 200, which is formed from the valve body 206 and the upper valve member 216 and the thereto flanged laterally flange plates 203 and 213.
  • a compressed air passage 223 extending in the flow direction S is provided which is connected to the compressed air supply via the compressed air connection 224.
  • the compressed air channel 223 opens into the port 225, which is in communication with the Venturi Laval nozzle 100.
  • a ball-bearing valve slide 209 which can be driven to oscillate in the transverse direction Q is provided, in whose two end faces a respective lifting rod 202, 214 is inserted, which is in each case connected to a reversing lifting magnet 201, 215.
  • the valve slide 209 is provided with a bore 222 whose cross section corresponds to the cross section of the compressed air channel 223. Via a seal 220 of the valve slide 209 is sealed against the compressed air passage 223.
  • the connection 225 is screwed into the valve lower part 206 via a thread 210.
  • the quick-closing valve 200 is shown in the open position.
  • the Umledhubmagneten 201, 215 are simultaneously driven alternately, that is, when the lifting rod 214 of the solenoid 215 extends, the solenoid 201 pulls its lifting rod 202 and the valve slide 209 is guided over four ball bearings 203, 211 (in the drawing to the left) in pushed his final position.
  • the bore 222 then passes out of overlap with the compressed air duct 223, whereby it is closed by means of the valve slide 209 sliding along the seal 220.
  • the lifting rod 202 is extended, the Umledgehubmagnet 215 attracts and the lifting rod 214 is retracted so that the valve slide 209 reaches its opposite end position and the compressed air channel 223 is released and the compressed air so that the compressed air gun 301.1, 301.2, 301.3 is present .
  • a motor-driven pressure regulating valve not shown here, is arranged.
  • the compressed air jet per compressed air gun can be controlled individually. This is necessary to get through to the various disturbing influences such as swirling through Wind, temperatures and distance to be able to react.
  • the switching time of the quick-closing valve 200 is adjustable in the millisecond range bar.
  • Laval venturi 100 and quick-acting valve 200 are not limited to use in the described fire extinguishing method. Both components can be used separately for other applications.
  • the compressed air is introduced into the Venturi Laval nozzle 100 by opening the quick-acting valve 200, it flows through the nozzle bores 108, 116. Via the Venturi nozzle 110, water is sucked in as a result of the high velocity and on the walls Drilled bores 109, 113 resulting frictional heat evaporates, merges into a water mist and connects to the compressed air.
  • the amount of water supplied by the Venturi nozzle 110 is approximately 0.015 l.
  • the arranged on the stainless steel plate 307 arranged compressed air guns 301.1, 301.2, 301.3 can be operated sequentially, so that each results in a sequence of three blasts of compressed air. In succession, a variety of sequences are then fired.
  • a compressor 314 with an air capacity of 3,500 l / min at a pressure of up to 365 bar is used. At a pressure of only 200 bar, the air output is increased to 6,378 l / min.
  • 2,747.5 l of compressed air can be stored at 200 bar.
  • the theoretical air flow rate for DN20 lines at 200 bar is 14 kg / s. This corresponds to 10,827.53 l / s.
  • a shot with the compressed air gun 301.1 at an opening time of the quick-closing valve 200 of 0.02 s allows 216.55 l of compressed air to escape.
  • the three compressed air guns 301.1, 301.2, 301.3 mounted on the plate 315 can be fired, for example, in the following sequence (shot sequence): Cannon 301.1: 0.02 s + 0.5 s break, Cannon 301.2: 0.02 s + 0.5 s break, Cannon 301.3: 0.02 s + 0.10 s break
  • the total air flow in this example at three shots in a sequence is 649.65 l in 11.06 s. This corresponds to a shotgun series of 5.42 rounds per minute and a total air volume of 3,521.1 l / m.
  • Venturi Laval nozzle 100 the shot (blast of compressed air) at 0.02 s opening time, a quantity of water of 0.015 l is supplied. The air is accelerated to a maximum of 4.3 Mach.
  • 0.2439 liters of water per minute are added to the compressed air.
  • a theoretical shot output of 325 sequences per hour 79.27 l / h and a daily use of 16 hours a total of 1268.3 l of water per day is needed.
  • the resulting water vapor significantly increases the shooting distance and the beam bundling. Ideally, it can be up to 100 meters.
  • the guns 301.1, 301.2, 301.3 can be fired, for example, in the following shot sequence: Cannon 301.1: 0.1 s + 6 s break, Cannon 301.2: 0.1 s + 12 s break, Cannon 301.3: 0.1 s + 18 s break.
  • the total air flow in this example at three shots in a sequence is 3,248.2 liters in 36 seconds. This corresponds to a shot sequence of 1.66 per minute and a total air volume of 5,392.10 l / min. Per shot 0.075 l of water are supplied in this example. In this series of 1.36 per minute, 0.3735 liters of water / min of compressed air is added. At a theoretical firing rate of 99.6 sequences / h 37.20 l / h are needed. Using 34 hours yields 1,264.8 liters of water needed.
  • the compressor 314 continuously shifts the required amount of air into the compressed air tanks 313.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP18154597.1A 2018-02-01 2018-02-01 Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable Withdrawn EP3520863A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18154597.1A EP3520863A1 (fr) 2018-02-01 2018-02-01 Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18154597.1A EP3520863A1 (fr) 2018-02-01 2018-02-01 Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable

Publications (1)

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EP3520863A1 true EP3520863A1 (fr) 2019-08-07

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EP18154597.1A Withdrawn EP3520863A1 (fr) 2018-02-01 2018-02-01 Procédé permettant d'éteindre des incendies de surface, buse de venturi-laval et soupape à fermeture rapide destinée à l'utilisation dans ledit procédé et véhicule au moyen duquel ledit procédé est applicable

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022119451A1 (fr) * 2020-12-04 2022-06-09 Halo Sb As Système de lutte contre les incendies de forêt
CN117449897A (zh) * 2023-11-20 2024-01-26 山西潞安环保能源开发股份有限公司 一种用于矿井的灭火装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223827B1 (en) * 1997-05-14 2001-05-01 Nauchno-Issledovatelsky Institut Nizkikh Temperatur Pri Mai Fire-extinguishing equipment
US20050077055A1 (en) * 2003-09-12 2005-04-14 Armando Celorio-Villasenor Ambient-air jet blast flames containment and suppression system
CN103949026A (zh) * 2014-03-28 2014-07-30 北京喜安妮科技发展有限公司 细水雾灭火系统
CN106669070A (zh) * 2015-11-09 2017-05-17 中国人民解放军军械工程学院 便携式细水雾单兵灭火系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223827B1 (en) * 1997-05-14 2001-05-01 Nauchno-Issledovatelsky Institut Nizkikh Temperatur Pri Mai Fire-extinguishing equipment
US20050077055A1 (en) * 2003-09-12 2005-04-14 Armando Celorio-Villasenor Ambient-air jet blast flames containment and suppression system
CN103949026A (zh) * 2014-03-28 2014-07-30 北京喜安妮科技发展有限公司 细水雾灭火系统
CN106669070A (zh) * 2015-11-09 2017-05-17 中国人民解放军军械工程学院 便携式细水雾单兵灭火系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022119451A1 (fr) * 2020-12-04 2022-06-09 Halo Sb As Système de lutte contre les incendies de forêt
CN117449897A (zh) * 2023-11-20 2024-01-26 山西潞安环保能源开发股份有限公司 一种用于矿井的灭火装置

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