KR20140026590A - Throwing type fire extinguisher - Google Patents

Throwing type fire extinguisher Download PDF

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Publication number
KR20140026590A
KR20140026590A KR1020140008341A KR20140008341A KR20140026590A KR 20140026590 A KR20140026590 A KR 20140026590A KR 1020140008341 A KR1020140008341 A KR 1020140008341A KR 20140008341 A KR20140008341 A KR 20140008341A KR 20140026590 A KR20140026590 A KR 20140026590A
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KR
South Korea
Prior art keywords
powder
cover
fire extinguisher
body portion
fire
Prior art date
Application number
KR1020140008341A
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Korean (ko)
Inventor
반병현
반병우
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한국과학기술원
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Publication date
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Priority to KR1020140008341A priority Critical patent/KR20140026590A/en
Publication of KR20140026590A publication Critical patent/KR20140026590A/en

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C19/00—Hand fire-extinguishers in which the extinguishing substance is expelled by an explosion; Exploding containers thrown into the fire
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/28—Accessories for delivery devices, e.g. supports

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

The present invention seals the body portion and the cover portion by using a hemispherical body portion formed of a hemispherical body portion and a cover portion formed by being cut into a plane horizontal to the diameter of the sphere, and a material melting at a set temperature. When the body portion and the cover portion is separated by the melting of the seal portion at the above set temperature, the powder is ejected to the body portion is loaded, the separate operation at the fire site heated above the set temperature Fire extinguishing powder can be sprayed without the use of a simple to use throwing fire extinguisher to succeed in the initial evolution.

Description

Throwing Fire Extinguisher {THROWING TYPE FIRE EXTINGUISHER}

The present invention relates to a throwing fire extinguisher which sprays powder by throwing to release the seal.

In general, a fire extinguisher placed in a house or a building is not normally used, so it is difficult to find a place to be placed in case of fire or a general user has to access a flower garden for use, so there is a high risk of injury from toxic gases and high temperatures caused by fire. There is a growing interest in throwing fire extinguishers that can be easily stored, inexpensive, and extinguishable by throwing at a distance.

Although fires are not too dry and occur spontaneously in forested mountains, most fires or wildfires are caused by carelessness of users or hikers. It is also caused by the gas supplied to the very many because the genius (天災) will be seen as most of the talent.

In the event of a fire in various buildings, it is possible to extinguish relatively quickly with the cooperation of local fire departments or other civil defense personnel, but in case of forest fires, it is impossible to enter vehicles and the roads are difficult to extinguish. In other words, it is easy to spread, and there are sometimes inexplicable problems such as casualties occurring during forest fire extinction and suppression.

In general, extinguishing powder type extinguishers are for extinguishing fires in the early stages of fire. There are various types of extinguishers that inject powder extinguishing agents by incombustible high-pressure gas (carbon dioxide, nitrogen). It is used in, but because the structure of the pressure gas cylinder must be provided inside the container of the fire extinguisher, the structure is complicated, the user's operation was also difficult.

In addition, since the extinguishing powder is pressure-filled, there is a risk of leakage of pressure during storage. As a result, the spraying distance of the extinguishing powder is shortened during actual use, which is a factor that may reduce the extinguishing effect or threaten the safety of the user.

On the other hand, throwing the container itself at the point of fire occurrence is destroyed the container is a fire extinguisher fire extinguisher to exert a fire extinguishing function to spread the powder extinguishing agent is known.

Conventional throwing fire extinguishers, such as registered Utility Model No. 20-0258504 has a form in which the hemispherical body and the cover is hinged and fixed with a fixed pin, when the fixed pin is removed and thrown, the extinguishing powder is sprayed. That is, Utility Model Registration No. 20-0258504 has a hemispherical shape, the main body is provided with a weight portion in the lower portion, and the hinges are hinged by a spring on the rim of the main body, respectively, and rotated upwards, the respective ends overlap each other The mounting hole is formed in the site, the fixing pin is mounted to the mounting hole to form a spherical shape with the main body, and the insertion hole is formed in the weight portion of the main body, the lower end protrudes into the insertion hole switch Is slide-inserted, the switch is connected to the fixing pin and the opening by a pull string passing through the ring formed adjacent to the insertion hole, the pull chamber is fixed to the inside of any one of the plurality of covers, and pulled inside The explosive part of which a part of the seal is located is wrapped with paper and fixed to the lower part of the main body, and a powder fire extinguishing agent filled in the inner space formed by the main body and the plurality of covers. As it is, if the pin is removed and thrown, the powder explosives are sprayed in all directions by causing the explosive to explode.

Throwing fire extinguishers, including the extinguishing powder and gunpowder have a risk of being exploded without permission due to the user's carelessness has a disadvantage of reducing the reliability of the product.

Korea Utility Model Registration No. 20-0258504 (Publication date: December 28, 2001) Republic of Korea Utility Model Publication No. 20-2010-0003220 (published: 2010.03.22) Republic of Korea Patent Publication No. 10-2004-0083404 (published: 2004.10.01)

Therefore, the present invention has been made to solve the problems caused by the existing fire extinguishers as described above, the object of the present invention is difficult to move, to solve the problems of the conventional fire extinguishing powder type fire extinguisher that can be sprayed only at a short distance. For this purpose, it is easy to throw and provide a throwing fire extinguisher that can be secured by fire suppression and escape more easily than existing fire extinguishers.It can be configured as a portable small fire extinguisher.The configuration is simple and the spraying area is expanded to ensure user safety and extinguishing ability. The aim is to provide a throwing fire extinguisher that can be improved.

The present invention for realizing the above object is a rectangular shaped case consisting of a hemispherical body portion and a cover portion are formed by cutting in a plane horizontal to the diameter of the square; And a sealing part sealing the body part and the cover part by using a material that melts at a set temperature, wherein the body part and the cover part are ejected to the outside when the body part and the cover part are separated by the melting of the seal part at or above the set temperature. Powder is loaded on the body portion.

The cover portion is formed in the upper portion of the inner cylindrical body of the elastic body extending toward the bottom of the body portion when coupled, the body portion and the cover portion is compressed and accommodated inside the elastic body receiving portion when the cover portion is in the combined state and the body portion and the cover When the seal of the part is released, further includes an elastic body that rebounds from the compression and expands, wherein the body part has a space in which the powder can be accommodated, a weight part disposed on the bottom of the inner surface of the body part to grasp the center of gravity by weight, and react with each other. And a drug receiving unit for separating and receiving a plurality of drugs generating gas, respectively, and a lower end portion of the elastic body receiving unit is formed to have a shape and a material ripper extending outward to break the material of the drug receiving unit. It is done.

Two or more nozzles for discharging gas or powder generated in the body portion to the outside is formed around the upper portion of the elastic body receiving portion, wherein the two or more nozzles are rotatably installed around the elastic body receiving portion.

The throwing type fire extinguisher according to the present invention can adjust the injection pressure of the extinguishing powder, and since the extinguishing powder is automatically injected at the fire site heated above the set temperature, the user does not need to operate the safety pin, etc. It has the advantage of being able to succeed in early evolution.

1 is a side perspective view of a ball-type powder injection apparatus according to an embodiment of the present invention, and for convenience of description, the internal structure shows only a weight body, a central axis, an elastic part, a bottom support part, and a ripper.
Figure 2 is a side cross-sectional view of the ball-type powder injection apparatus according to an embodiment of the present invention, the seal is open to show a state in which the cover is open. For convenience of description, only the components shown in FIG. 1 are shown.
Figure 3 is a perspective view of a ball-type powder injection apparatus according to an embodiment of the present invention, the inclined body is shown as a bar due to the weight of the weight body.
Figure 4 is a cross-sectional view of the ball-type powder injection apparatus according to an embodiment of the present invention, a state in which the cover is opened to expose the nozzle portion to the outside, and the cover portion is omitted for convenience of description.
5 is a side cross-sectional view of FIG. 4.
Figure 6 is a side cross-sectional view of the lower part of the ball-type powder injection apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a side perspective view of a throwing fire extinguisher according to an embodiment of the present invention, Figure 2 is a side cross-sectional view of the throwing fire extinguisher according to an embodiment of the present invention, showing a fire extinguisher in the cover portion open state. Figure 3 is a perspective view of a throwing fire extinguisher according to an embodiment of the present invention, showing the inclined spherical body standing upright due to the weight of the weight part. Figure 4 is a cross-sectional view of the throwing fire extinguisher according to an embodiment of the present invention and Figure 5 is a side cross-sectional view of the throwing fire extinguisher of Figure 4, showing the throwing fire extinguisher in the cover portion is exposed to the nozzle portion is exposed to the outside . Figure 6 is a side cross-sectional view showing a lower portion of the throwing fire extinguisher according to an embodiment of the present invention.

As shown in Figure 1, the throwing fire extinguisher according to an embodiment of the present invention has a spherical case 100. The spherical case 100 is divided into a body portion 120 and a cover portion 110 in a cut form as a plane horizontal to the diameter. It is preferable to form the body portion 120 to occupy a volume of 50% or more.

The cover 110 has a cylindrical elastic body receiving portion 200 extending toward the bottom of the body portion 120 at the upper end of the inner surface. The elastic body 210, such as a spring, is compressed and accommodated in the elastic body accommodating part 200 when the body part 120 and the cover part 110 are coupled to each other. When the body part 120 and the cover part 110 are separated, the compressed elastic body repels the cover part 110 and the body part 120 to receive a repulsive force in opposite directions. The cylindrical elastic body receiving portion 200 preferably extends to the lower end to form a ripper that can damage the drug receiving portion 600.

Body portion 120 is located in the space where the powder can be accommodated inside and the weight portion 400, which is disposed on the bottom of the inner surface of the body portion 120 to grasp the center of gravity by weight, the elastic body receiving portion 200 It is formed in a corresponding shape and includes a support 230 for fluidly coupled so that the elastic body receiving portion 200 does not exit out of the body portion 120 when the cover portion and the body portion 120 is separated. In addition, the body 120 may include one or more drug receiving parts 600. The powder may be loaded in the space around the medicine container 600. Preferably it may be loaded on the drug receiving portion 600.

The drug receiving part 600 is formed of a breakable material by the end of the ripper 220 to accommodate a plurality of drugs. When the cover portion 110 and the body portion 120 is separated when the ripper 220 rises, the shell of the medicine container 600 is destroyed by the pointed end of the end of the ripper 220, and the medicine contained in the container is housed. 600 is exposed outside. The medicament includes two or more chemical products that react with each other in a short time to generate a large amount of gas, and the medicament accommodating portion 600 isolates and receives each medicament.

The medicines accommodated in the plurality of drug receiving portions 600 may include sodium bicarbonate (NaHCO 3 ) and aluminum sulfate hydrate (Al (SO 4 ) 3 ), and the sodium bicarbonate (NaHCO 3 ) may be in a solution state. The aluminum sulfate hydrate (Al (SO 4 ) 3 ) may also be in solution. In addition, the drug may include sodium bicarbonate (NaHCO 3 ) and sulfuric acid (H 2 SO 4 ), the sodium bicarbonate (NaHCO 3 ) may be in a solution state.

When the plurality of drug storage unit 600 is isolated to accommodate the sodium hydrogen carbonate and aluminum sulfate hydrate and the cover unit 110 is separated, the ripper 220 destroys the plurality of drug storage unit 600 to the drug Reaction as shown in the following formula (1), the plurality of drug receiving unit 600 is separated and accommodated sodium hydrogen carbonate and sulfuric acid, and when the drug receiving unit is destroyed by the ripper, the drug reacts as shown in the following formula (2) do.

2NaHCO 3 + H 2 SO 4- > Na 2 SO 4 + 2CO 2 + 2H 2 O (Formula 1)

6NaHCO 3 + Al 2 (SO 4 ) 3 18H 2 O-> 3Na 2 SO 4 + 2Al (OH) 3 + 6CO 2 + 18H 2 O (Formula 2)

Therefore, when the lid part 110 is separated and the ripper destroys the drug receiving part 600, the drug reacts as shown in Chemical Formulas 1 and 2 to generate a large amount of gas, and thus the powder contained in the space around the drug receiving part 600 ( 610 is ejected to the outside.

On the other hand, two to discharge the gas or powder generated in the body portion 120 to the outside exposed to the position of the sealing portion 500, in particular when one side of the cylindrical elastic body receiving portion 200 is released. The above nozzle 300 is formed. The nozzle 300 is connected to the tube 310, the end of which is open to the bottom of the body portion 120. The plurality of nozzles 300 are rotatably installed on the outer circumferential surface of the elastic body accommodating part 200 so that the powder is sprayed in all directions by rotating the reaction reaction force while the powder 610 is discharged from the two or more nozzles 300. can do. The nozzle 300 is preferably disposed so that the end for injecting powder is upwardly sprayed powder.

That is, when a large amount of gas is generated while the drugs react with the destruction of the medicine container 600, the powder is ejected to the nozzle 300 through the tube 310 due to volume expansion. Since the plurality of nozzles 300 are rotatably installed on the outer circumferential surface of the elastic body accommodating part 200, when the powder 610 is discharged through the nozzles 300, the reaction forces exert on the nozzles 300 and the nozzles 300 rotate. Done. Therefore, the powder 610 is sprayed in all directions.

On the other hand, the cover 110 and the body portion 120 is joined by a sealing portion 500 that is melted at a set temperature to release the seal. The seal part 500 may be formed of a low temperature molten metal or be made of a polymer material that is melted at a set temperature. Sealing unit 500 according to an embodiment of the present invention is preferably formed of a low-melting metal that is an alloy that melts at a relatively low temperature of 200 ° C or less. The composition ratio of the low melting metal used for the sealing part 500 is shown in Table 1.

Low melting metal no. Melting point Furtherance % Bi Pb Sn CD  One 70 ° c 50 26.7 13.3 10  2 70 ~ 83 ° c 42.5 37.7 11.3 8.5

Table 1 shows melting points and compositions of two representative low melting metals that can be used for the sealing part 500 for sealing the body part 120 and the cover part 110 of the throwing fire extinguisher according to the exemplary embodiment of the present invention. That is, the sealing part 500 may be made of an alloy of Bi, Pb, Sn, Cd, in which case the composition ratio of the metals is 50: 26.7: 13.3: 10 to 42.5: 37.7: 11.3: 8.5 and the melting point is 70 It may be composed of a low melting metal of ℃ ~ 88 ℃. Therefore, when the sealing unit 500 is formed of the low melting metal 1 or 2 metal, the throwing type fire extinguisher is thrown at the fire site and the sealing unit 500 is melted when the ambient temperature reaches 70 ° C to 88 ° C due to the fire. . As the sealing part 500 is melted, the coupling force that couples the cover part 110 and the body part 120 is weakened, and the cover part 110 and the body part 120 that are coupled by the sealing part 500 are compressed. Due to the repulsive force of the elastic body 210 is separated.

The throwing fire extinguisher of the present invention further includes a separate safety pin for coupling the cover 110 and the body 120, so that the cover 110 is not opened from the body 120 when the safety pin is not removed. can do.

On the other hand, the solid body 610 is accommodated in the body portion 120, it is preferably loaded around the drug receiving portion 600, preferably can be loaded on the drug receiving portion 600. The solid powder 610 may include an extinguishing agent or an explosive in powder form, smoke cloud powder, or tear gas powder. Plural kinds of powder may be accommodated together.

The throwing fire extinguisher configured as described above, when the sealing part 500 is melted, the coupling force of the cover 110 and the body 120 is weakened, and when the seal is released by the repulsive force of the elastic body, the cover 110 is opened.

The seal unit 500 may release the seal while melting at a temperature higher than the melting point of the used low melting metal, or may release the seal when subjected to a strong impact. If the seal is released by impact, install a device such as a safety pin separately.

The body part 120 includes a drug accommodating part 600 for accommodating a plurality of drugs that react with each other within a short time to generate a large amount of gas. When the cover part 110 is opened, the ripper 220 is raised. At the end, the drug receiving unit 600 is torn, and the leaked drugs react with each other to release a large amount of gas in a short time. When the pressure rises due to the release of a large amount of gas from the inside, the powder is ejected to the outside through the tube 310 and the nozzle 300.

Since the nozzles 300 are spaced apart from each other to apply a constant torque to the upper circumference of the cylindrical elastic body receiving part 200, when the powder is ejected through the nozzle 300, a strong torque is generated, and the nozzle 300. Is rotated about the elastic receiving portion 200 with the central axis. When the powder discharge end of the nozzle 300 is formed upward, the injection range of the discharged powder 610 is further widened to improve the extinguishing efficiency. Since the upward nozzle 300 is ejected while rotating, the spraying range of the powder is further expanded.

Injection pressure can be adjusted by adjusting the amount of the drug reacted. When it is necessary to form the internal pressure, such as a general fire extinguisher, it can be uniformly injected into a radius of 2 ~ 3m space, but in that case there is a problem that is too heavy to be easy to throw, the throwing fire extinguisher of the present invention is about the internal pressure of about It can be maintained at 1 atm, so there is no need to make a lot of weight for durability of the container. Therefore, it can be used easily at a fire site.

Throwing fire extinguisher of the present invention has the advantage of being able to adjust the seal breaking conditions depending on the application depending on the temperature, impact. In addition, even if made small and light, the extinguishing powder injection efficiency is excellent, so it can be placed anywhere where there is a risk of fire, there is an advantage that can suppress the fire early. In addition, there is an advantage that the fire can be initially entered only by placing a fire extinguisher where a fire occurs without knowing how to use it. In addition, the fire extinguishing powder is automatically ejected in the event of a dangerous situation, such as a fire placed on the evacuation line to secure the evacuation route and has an advantage to extinguish early.

The throwing fire extinguisher of the present invention is sprayed with extinguishing powder in all directions. In particular, since the extinguishing powder can be sprayed 360 degrees in all directions while rotating, it is possible to ensure safety in all directions. Thus, while the throwing fire extinguisher of the present invention is in operation, it is possible to evolve a range of several meters in radius.

The throwing fire extinguisher of the present invention has a spherical body and includes a weight at the bottom- which has the effect. That is, the part to be sprayed is located at the top to increase the spraying efficiency.

Inside the throwing type fire extinguisher, the drug contained in the reaction to each other is contained in the drug receiving unit, and the lid is opened, the drug receiving unit 600 is destroyed from the inside, the two drugs react and release a large amount of gas in a short time, the fire scene Can react rapidly to extinguish and extinguish the extinguishing powder.

Preferably, the plurality of nozzles 300 are spaced apart from each other to apply a torque in a predetermined direction to the elastic body receiving part 200 to generate a strong torque, and thus, the throwing type fire extinguisher case itself may rotate to inject powder. Since the injection of the powder and the rotation of the case itself occur together, the powder can be injected in all directions. In other words, the extinguishing powder is sprayed in all directions 360 degrees while rotating to ensure safety in all directions. Conventional fire extinguishers can be sprayed forward only, so the safety of the rear is not guaranteed when the fire is extinguished or escaped, but the throwing fire extinguisher of the present invention can secure a few meters of radius as a safety zone during operation.

Throwing type fire extinguisher of the present invention can be melted at a temperature higher than the set temperature when the fire occurs when the fire occurs, can put out the fire at the initial stage, when placed on the evacuation copper line can secure an escape route in case of fire, throwing It can be easily secured by fire suppression and escape than existing fire extinguishers that are hard to move and can only be sprayed in close proximity.

Throwing fire extinguisher of the present invention configured as described above can be used in the powder injection device, such as smoke bombs, CP coal, solid powder injection device, surface powder injection device as well as the injection of the extinguishing powder.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention. The detailed description of the invention, if necessary, may serve as a citation for better understanding of the claims.

100 case 110 cover part
120: body portion 200: elastic body receiving portion
210: elastic body 220: ripper
230: bottom support portion 400: parts by weight
500: sealing unit 600: drug storage unit
610: Powder

Claims (3)

A rectangular shaped case consisting of a hemispherical body portion and a cover portion which are respectively cut and cut into a plane horizontal to the diameter of the square; And
And a sealing part sealing the body part and the cover part by using a material melting at a predetermined temperature.
And a powder ejected to the outside when the body part and the cover part are separated by melting the sealing part at the set temperature or more is loaded into the body part. The method of claim 1,
The cover portion is formed in the upper portion of the inner cylindrical body of the elastic body extending toward the bottom of the body portion when coupled, the body portion and the cover portion is compressed and accommodated inside the elastic body receiving portion when the cover portion is in the combined state and the body portion and the cover When the negative seal is released further includes an elastic body that rebounds and expands from the compression,
The body portion includes a space in which powder can be accommodated, a weight portion disposed on the bottom of the inner surface of the body portion to grasp the center of gravity by weight, and a medicine receiving portion for separating and accommodating a plurality of drugs that generate gas when reacted with each other. ,
Throwing fire extinguisher is formed at the lower end of the elastic body receiving portion is extended to the outside of the shape and material that can damage the drug receiving material. 3. The method of claim 2,
And at least two nozzles for discharging gas or powder generated in the body to the outside around an upper portion of the elastic container.
KR1020140008341A 2014-01-23 2014-01-23 Throwing type fire extinguisher KR20140026590A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107935A1 (en) * 2014-12-30 2016-07-07 Espherical Life Barrier, S.A.U. Fire extinguishing device
KR101880024B1 (en) 2017-04-28 2018-07-19 주식회사 나노메딕스 Whether or not to use and positioning confirmation system of throwing fire extinguisher
KR20200071999A (en) * 2018-12-12 2020-06-22 이은수 Vehicle Indoor Beach Fire Extinguisher
CN111589024A (en) * 2020-05-30 2020-08-28 黄建中 Fire-fighting ball
KR20200132615A (en) 2019-05-15 2020-11-25 최승화 Sensor type throwing-extinguisher
KR20200134593A (en) 2019-05-22 2020-12-02 한호진 Fire extinguisher of throwing type having snow ball shape
KR20210107332A (en) * 2020-02-24 2021-09-01 김경수 Grenade for forest fire extinguish
KR20210125390A (en) * 2020-04-08 2021-10-18 김진영 Grenade launching equipment for fire suppression and fire suppression method using thereof
KR102433908B1 (en) 2021-10-27 2022-08-22 대한민국 Spherical fire extinguisher

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107935A1 (en) * 2014-12-30 2016-07-07 Espherical Life Barrier, S.A.U. Fire extinguishing device
KR101880024B1 (en) 2017-04-28 2018-07-19 주식회사 나노메딕스 Whether or not to use and positioning confirmation system of throwing fire extinguisher
KR20200071999A (en) * 2018-12-12 2020-06-22 이은수 Vehicle Indoor Beach Fire Extinguisher
KR20200132615A (en) 2019-05-15 2020-11-25 최승화 Sensor type throwing-extinguisher
KR20200134593A (en) 2019-05-22 2020-12-02 한호진 Fire extinguisher of throwing type having snow ball shape
KR20210107332A (en) * 2020-02-24 2021-09-01 김경수 Grenade for forest fire extinguish
KR20210125390A (en) * 2020-04-08 2021-10-18 김진영 Grenade launching equipment for fire suppression and fire suppression method using thereof
CN111589024A (en) * 2020-05-30 2020-08-28 黄建中 Fire-fighting ball
CN111589024B (en) * 2020-05-30 2021-10-26 湖南季安建设工程有限公司 Fire-fighting ball
KR102433908B1 (en) 2021-10-27 2022-08-22 대한민국 Spherical fire extinguisher

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