CN112972945B - Hand-held type water gas mixing foam fire extinguishing sprayer - Google Patents
Hand-held type water gas mixing foam fire extinguishing sprayer Download PDFInfo
- Publication number
- CN112972945B CN112972945B CN202110413495.0A CN202110413495A CN112972945B CN 112972945 B CN112972945 B CN 112972945B CN 202110413495 A CN202110413495 A CN 202110413495A CN 112972945 B CN112972945 B CN 112972945B
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- ring body
- mixer
- flow passage
- wall
- communicated
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000006260 foam Substances 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 210000001503 joint Anatomy 0.000 claims description 22
- 239000007787 solid Substances 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 8
- 239000003570 air Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 13
- 239000007921 spray Substances 0.000 abstract description 9
- 238000005187 foaming Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/002—Apparatus for mixing extinguishants with water
-
- 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
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
-
- 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
Abstract
The invention relates to a hand-held water-air mixing foam fire-extinguishing injector, which comprises a mixer and an injection pipe connected with the front end of the mixer, wherein an annular flow passage is arranged at the middle front part in the mixer, a branch passage communicated with the annular flow passage is arranged at the middle rear part of the mixer, and the outlet end of the branch passage is opposite to the injection pipe towards the front end; the front part of the mixer is provided with a plurality of spray holes which are communicated with the annular channel and the spray pipe and are obliquely arranged; a water inlet communicated with the annular flow passage is arranged below the outer wall of the mixer; the side part of the mixer is also provided with a liquid inlet pipe communicated with the tail end of the tributary channel. After the technical scheme is adopted, the foam liquid, water and air can be mixed and impacted for multiple times in the mixer by utilizing the annular flow channel, the branch flow channel and the obliquely arranged jet orifice in the mixer, so that a better foaming effect is achieved, and a better fire extinguishing effect is further achieved.
Description
Technical field:
the invention relates to the technical field of fire-fighting equipment, in particular to a handheld water-gas mixed foam fire-extinguishing sprayer.
The background technology is as follows:
the air foam fire extinguishing device is mainly used for extinguishing oil, alcohol and other combustible liquid fires in oil houses, airports, petrochemical plants, paint plants, alcohol plants and the like, and the basic working principle is as follows: when a fire house occurs, the fire hydrant is connected to the fire hydrant through the water hose, namely, a water source is connected, the proportion mixer utilizes the pressure of the water source to pump the concentrated foam liquid out of the fire extinguishing agent barrel, and then the foam spray gun automatically sucks air to form air foam for fire extinguishment.
The existing fire extinguishing ejectors, such as a foam fire extinguishing gun disclosed in China patent 201720129160.5, a portable foam fire extinguishing gun disclosed in China patent 201520308704.5, a spray gun for fire extinguishment disclosed in China patent 202011545631.3 and the like, have the defects of poor mixing foaming effect and high consumption due to the fact that the foam liquid and water are directly mixed by adopting a common tee joint or similar simple structure, and have the defects of convenience in hand holding and the like.
The invention comprises the following steps:
the invention aims to overcome the defects in the prior art and provides a handheld water-air mixed foam fire extinguishing injector.
The technical scheme adopted by the invention is as follows: the hand-held water-gas mixed foam fire-extinguishing sprayer comprises a mixer and a spraying pipe connected with the front end of the mixer, wherein an annular flow passage is arranged at the middle front part in the mixer, and a cavity communicated with the spraying pipe is formed in the inner side wall of the annular flow passage; a branch passage communicated with the annular flow passage is arranged at the middle rear part of the mixer, and the outlet end of the branch passage is positioned on the axis of the mixer and is opposite to the injection pipe towards the front end; the front part of the mixer and the front end wall of the annular flow passage of the mixer are provided with a plurality of injection holes communicated with the annular passage and the injection pipe, and the injection holes are obliquely arranged towards the axial direction of the injection pipe; a water inlet communicated with the annular flow passage is arranged below the outer wall of the mixer; the side part of the mixer is also provided with a liquid inlet pipe communicated with the tail end of the tributary channel, and the liquid inlet pipe penetrates through the side wall of the mixer; the rear end opening of the mixer is communicated with the cavity and the jet pipe.
Specifically, the mixer comprises an outer ring body, a front ring body, a middle ring body and a rear ring body, wherein,
the inner wall of the rear end of the outer ring body is provided with an annular flange which is bent towards the front end, the inner end surface of the front ring body is in butt joint with the annular flange, the outer wall of the front ring body is in sealing connection with the inner wall of the front end of the outer ring body, the front end of the front ring body is communicated with the injection pipe, an annular flow passage is formed between the outer wall of the middle rear section of the front ring body and the inner wall of the outer ring body and the annular flange, the water inlet is arranged on the outer wall below the outer ring body, and the injection hole is arranged on the side wall of the front ring body;
the inner wall of the middle ring body is provided with a first solid part towards the center, a first flow passage parallel to the axial direction is formed on the first solid part near the edge, a third flow passage is formed at the lower end of the first solid part along the axial direction of the middle ring body, the first flow passage and the third flow passage respectively penetrate through the front end and the rear end of the first solid part, and a first through hole communicated with the first flow passage in a butt joint manner is formed on the flow passage wall of the annular flow passage in the outer ring body;
the rear ring body is in butt joint with the rear end part of the middle ring body, a second solid part is formed on the inner wall of the rear ring body towards the center, and a second flow passage in butt joint communication with the first flow passage and the third flow passage is formed on the second solid part;
the liquid inlet pipe is arranged at the joint of the middle ring body and the rear ring body, and the inner end part of the liquid inlet pipe is communicated with the joint of the second flow channel and the third flow channel;
the space outside the solid parts of the rear ring body and the middle ring body forms an air flow channel which is communicated with the cavity of the outer ring body, the front ring body and the jet pipe.
Further, on the middle ring body and the rear ring body, the joint of the third runner and the second runner of the first entity part and the second entity part jointly forms a containing cavity, an insert is arranged in the containing cavity, an insert runner which is in butt joint communication with the third runner and the second runner is formed in the insert, and the inner end part of the liquid inlet pipe penetrates into the insert and is vertically communicated with the insert runner.
The diameter of the middle section of the insert runner is smaller than that of the front section and the rear section, and the front end and the rear end of the insert runner are outwards gradually expanded and are respectively in butt joint communication with the third runner and the second runner.
The outlet end of the third runner is also connected with a small liquid outlet pipe, and the end part of the small liquid outlet pipe is in a contracted shape.
The liquid inlet pipe is also connected with a flow regulating valve, and an adjusting knob of the regulating valve is positioned outside the mixer.
The water inlet is connected with a water inlet pipe which is used as a hand-held handle, and the tail end of the water inlet pipe is provided with a quick connector.
The rear end part of the rear ring body is also connected with a rear cover, an air inlet grid is arranged on the rear cover, and a handle is also connected on the rear cover.
The outer wall of the mixer is also provided with a pressure gauge for measuring the pressure of the water flow in the annular flow passage.
And sealing rings are respectively arranged on the butt joint surfaces of the outer ring body, the middle ring body, the rear ring body, the insert and the insert runner.
After the technical scheme is adopted, the annular flow passage, the branch flow passage and the obliquely arranged jet orifice are arranged in the mixer, so that foam liquid, water and air can be mixed and impacted for multiple times in the mixer to foam, a better foaming effect is achieved, a better fire extinguishing effect is achieved, meanwhile, the water inlet pipe is used as a handle, the structure is simplified, the weight of the sprayer is reduced, and the convenience of handheld operation is improved.
Description of the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the embodiment of FIG. 1;
FIGS. 3 and 4 are exploded views of the embodiment of FIG. 1;
fig. 5 is a schematic structural view of another embodiment of the present invention.
The specific embodiment is as follows:
as shown in fig. 1-4, the invention relates to a hand-held water-air mixing foam fire-extinguishing injector, which comprises a mixer 1 and an injection pipe 2 connected with the front end of the mixer 1, wherein an annular flow passage 101 is arranged in the mixer 1, the annular flow passage 101 is arranged along the periphery of the inner wall of the mixer 1 and is positioned at the middle front part of the mixer 1, a cavity 102 communicated with the injection pipe 2 is formed in the inner side wall of the annular flow passage 101, and in the embodiment, the cavity 102 is cylindrical; a branch passage 103 communicating with the annular flow passage 101 is arranged at the middle and rear part of the mixer 1, and the outlet end of the branch passage 103 is positioned on the axis of the mixer 1 and is opposite to the injection pipe 2 towards the front end; a plurality of injection holes 104 communicated with the annular channel 101 and the injection pipe 2 are formed in the front part of the mixer 1 and the front end wall of the annular flow channel 101 of the mixer 1, and the injection holes 104 are obliquely arranged towards the axial direction of the injection pipe 2; a water inlet 105 communicated with the annular flow channel 101 is arranged below the outer wall of the mixer 1; a liquid inlet pipe 3 communicated with the tail end of the branch passage 103 is also arranged at the side part of the mixer 1, and the liquid inlet pipe 3 is vertically communicated with the branch passage 103 in the embodiment to form negative pressure so as to suck foam liquid from the liquid inlet pipe; and the liquid inlet pipe 3 penetrates through the side wall of the mixer 1; the rear end opening of the mixer 1 communicates with the cavity 102, the ejector tube 104 in sequence for the intake of the air flow.
On the one hand, high-pressure water flow enters the annular flow passage 101 from the water inlet 105 of the mixer 1, one part of water flow is directly sprayed from the spray hole 104 into the spray pipe 2 and is sprayed from the periphery to the center, and the other part of water flow flows backwards from the branch flow passage 103 at the rear part, is turned back in the radial direction and is sprayed axially towards the spray pipe 2 along the axial direction; on the other hand, the water flow ejected from the branch passage 103 forms a negative pressure suction effect at the liquid inlet pipe 3 at the end thereof, so that the foam liquid in the liquid supply pipe connected with the liquid inlet pipe 3 is absorbed into the branch passage 103 to be mixed with the water, and then ejected into the cavity 102 and the ejector pipe 2 along the axial direction, and further mixed with the water ejected from the peripheral ejection holes 104 and the air entering from the rear part of the mixer 1 to impact and foam, and after being fully foamed in the ejector pipe 2, the foam is ejected from the ejector pipe 2, thereby achieving a better fire extinguishing effect.
Specifically, the mixer 1 includes an outer ring body 11, a front ring body 12, a middle ring body 13, and a rear ring body 14, wherein,
the inner wall of the rear end of the outer ring body 11 is formed with an annular flange 111 bent towards the front end, the inner end face of the front ring body 12 is in butt joint with the annular flange 111, the outer wall of the front ring body 12 is in sealing connection with the inner wall of the front end of the outer ring body 11, the front end of the front ring body 12 is in butt joint communication with the injection pipe 2, an annular flow passage 101 is formed between the outer wall of the middle rear section of the front ring body 12, the inner wall of the outer ring body 11 and the annular flange 111, the water inlet 105 is arranged on the outer wall below the outer ring body 11, the injection hole 104 is arranged on the side wall of the front ring body 11, the diameter of the side wall is reduced to form an inclined step surface, the injection hole 104 is arranged at the inclined step surface, penetrates through the side wall of the front ring body 11, the number of the injection holes is 6 in the embodiment, and the injection holes are uniformly arranged on the periphery of the front ring body 11;
the middle ring body 13 is in butt joint with the rear end part of the outer ring body 11, a first solid part 131 is formed on the inner wall of the middle ring body 13 towards the center, a first flow channel 132 parallel to the axial direction is formed on the edge of the first solid part 131, a third flow channel 133 is formed at the lower end of the first solid part 131 along the axial direction of the middle ring body 13, the first flow channel 132 and the third flow channel 133 respectively penetrate through the front end and the rear end of the first solid part 131, and a first through hole 112 in butt joint communication with the first flow channel 132 is formed on the flow channel wall of the annular flow channel 101 in the outer ring body 11;
the rear ring body 14 is abutted with the rear end part of the middle ring body 13, a second solid part 141 is formed on the inner wall of the rear ring body 14 towards the center, and a second flow passage 142 which is in abutting communication with the first flow passage 132 and the third flow passage 133 is formed on the second solid part 141; in this embodiment, the second flow channel 142 has a "U" shape; (also shown in the figure are the processing holes formed by processing the U-shaped structure, and after the assembly is completed, the holes are blocked by screws or other objects.)
The liquid inlet pipe 3 is arranged at the joint of the middle ring body 13 and the rear ring body 14, and the inner end part of the liquid inlet pipe 3 is communicated with the joint of the second flow channel 142 and the third flow channel 133;
the space outside the solid parts of the rear ring body 14 and the middle ring body 13 forms an air flow channel which is communicated with the cavity 102 of the outer ring body 11, the front ring body 12 and the injection pipe 2, so that air is automatically sucked in the injection process to participate in the foaming and mixing of water and foam liquid, and a better fire extinguishing effect is achieved.
Further, on the middle ring body 13 and the rear ring body 14, a receiving cavity 106 is formed at the joint of the third flow channel 133 and the second flow channel 142 of the first entity part 131 and the second entity part 141, an insert 4 is arranged in the receiving cavity 106, an insert flow channel 401 is formed inside the insert 4 and is in butt joint communication with the third flow channel 133 and the second flow channel 142, and the inner end part of the liquid inlet pipe 3 penetrates into the insert 4 and is vertically communicated with the insert flow channel 401 in the radial direction;
the diameter of the middle section of the insert runner 401 is smaller than that of the front and rear sections, and the front and rear ends of the insert runner are gradually expanded outwards and are respectively in butt joint communication with the third runner 133 and the second runner 142. By using the insert 4 and the insert flow channel 401 with a special shape inside, the water and the foam liquid which are conveyed from the second flow channel 142 and the liquid inlet pipe 3 are firstly mixed in a narrow space and then rapidly spread into a wider space, so that a better mixed foaming effect is realized.
Sealing rings are respectively arranged on the butt joint surfaces of the outer ring body 11, the middle ring body 12, the rear ring body 13, the insert 4 and the insert runner 401 so as to realize sealing butt joint, and leakage is avoided; and positioning holes and positioning columns are formed or accurate positioning and assembly are realized through screw holes, screws and the like.
The outlet end of the third flow channel 133 on the middle ring body 13 is also connected with a small liquid outlet pipe 134, and the end part of the small liquid outlet pipe 134 is contracted, so that the liquid outlet pressure and speed can be kept, so that part of the mixed liquid is sprayed in a columnar shape along the axial direction, and is impacted and mixed with the water sprayed obliquely from the spray hole 104 again, and the mixed foaming effect is further improved.
The water inlet 105 is connected with a water inlet pipeline 5, and the water inlet pipeline 5 is used as a hand-held grip, so that the spray direction of the sprayer can be conveniently held and controlled in use. The end of the water inlet pipe 5 is provided with a quick connector 51 to facilitate quick connection of the water supply pipe.
The rear end of the rear ring body 14 is also connected with a rear cover 15, the rear cover 15 is provided with an air inlet grid 151, the rear cover 15 is also connected with a handle 152, the rear cover 15 is arranged to enable the whole sprayer to be more attractive and complete, and meanwhile, the handle 152 is arranged to facilitate carrying.
The outer wall of the mixer 1 is also provided with a pressure gauge 16 for measuring the water flow pressure in the annular flow passage 101 so that an operator can grasp the injection pressure at any time and better adjust the injection state according to the injection pressure.
In another embodiment, as shown in fig. 5, the liquid inlet pipe 3 is further connected with a flow regulating valve 31, and the regulating knob of the regulating valve 31 is located outside the mixer 1, so as to conveniently regulate the foam liquid amount transmitted by the liquid inlet pipe 3, thereby controlling the mixing ratio of water and foam liquid, and realizing the optimal ratio and the best fire extinguishing effect according to the requirement. The outer end part of the liquid inlet pipe 3 also adopts a quick joint structure so as to quickly connect or disconnect the foam liquid supply pipeline.
After the technical scheme is adopted, the annular flow channel 101, the branch flow channel 103 and the obliquely arranged jet orifice 105 which are arranged in the mixer 1 are utilized, so that foam liquid, water and air can be mixed and impacted for multiple times in the mixer 1 to foam, a better foaming effect is achieved, and a better fire extinguishing effect is achieved.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (9)
1. A hand-held water-gas mixing foam fire-extinguishing sprayer, which comprises a mixer and a spraying pipe connected with the front end of the mixer, and is characterized in that: an annular flow passage is arranged at the middle front part in the mixer, and a cavity communicated with the injection pipe is formed inside the inner side wall of the annular flow passage; a branch passage communicated with the annular flow passage is arranged at the middle rear part of the mixer, and the outlet end of the branch passage is positioned on the axis of the mixer and is opposite to the injection pipe towards the front end; the front part of the mixer and the front end wall of the annular flow passage of the mixer are provided with a plurality of injection holes communicated with the annular passage and the injection pipe, and the injection holes are obliquely arranged towards the axial direction of the injection pipe; a water inlet communicated with the annular flow passage is arranged below the outer wall of the mixer; the side part of the mixer is also provided with a liquid inlet pipe communicated with the tail end of the tributary channel, and the liquid inlet pipe penetrates through the side wall of the mixer; the rear end opening of the mixer is communicated with the cavity and the jet pipe;
the mixer comprises an outer ring body, a front ring body, a middle ring body and a rear ring body, wherein,
the inner wall of the rear end of the outer ring body is provided with an annular flange which is bent towards the front end, the inner end surface of the front ring body is in butt joint with the annular flange, the outer wall of the front ring body is in sealing connection with the inner wall of the front end of the outer ring body, the front end of the front ring body is communicated with the injection pipe, an annular flow passage is formed between the outer wall of the middle rear section of the front ring body and the inner wall of the outer ring body and the annular flange, the water inlet is arranged on the outer wall below the outer ring body, and the injection hole is arranged on the side wall of the front ring body;
the inner wall of the middle ring body is provided with a first solid part towards the center, a first flow passage parallel to the axial direction is formed on the first solid part near the edge, a third flow passage is formed at the lower end of the first solid part along the axial direction of the middle ring body, the first flow passage and the third flow passage respectively penetrate through the front end and the rear end of the first solid part, and a first through hole communicated with the first flow passage in a butt joint manner is formed on the flow passage wall of the annular flow passage in the outer ring body;
the rear ring body is in butt joint with the rear end part of the middle ring body, a second solid part is formed on the inner wall of the rear ring body towards the center, and a second flow passage in butt joint communication with the first flow passage and the third flow passage is formed on the second solid part;
the liquid inlet pipe is arranged at the joint of the middle ring body and the rear ring body, and the inner end part of the liquid inlet pipe is communicated with the joint of the second flow passage and the third flow passage.
2. The hand-held water vapor mixing foam fire suppression sprinkler of claim 1, wherein: and on the middle ring body and the rear ring body, the joint of the third runner of the first solid part and the second runner jointly forms a containing cavity, an insert is arranged in the containing cavity, an insert runner which is in butt joint communication with the third runner and the second runner is formed in the insert, and the inner end part of the liquid inlet pipe penetrates into the insert and is vertically communicated with the insert runner.
3. The hand-held water vapor mixing foam fire suppression sprinkler of claim 2, wherein: the diameter of the middle section of the insert runner is smaller than that of the front section and the rear section, and the front end and the rear end of the insert runner are outwards gradually expanded and are respectively in butt joint communication with the third runner and the second runner.
4. A hand-held water-air mixing foam fire suppression injector according to claim 2 or 3, characterized in that: the outlet end of the third runner is also connected with a small liquid outlet pipe, and the end part of the small liquid outlet pipe is in a contracted shape.
5. A hand-held water-gas mixing foam fire suppression injector according to claim 1 or 2 or 3, characterized in that: the liquid inlet pipe is also connected with a flow regulating valve, and an adjusting knob of the regulating valve is positioned outside the mixer.
6. The hand-held water vapor mixing foam fire suppression sprinkler of claim 1, wherein: the water inlet is connected with a water inlet pipeline serving as a handheld grip, and a quick connector is arranged at the tail end of the water inlet pipeline.
7. The hand-held water vapor mixing foam fire suppression sprinkler of claim 1, wherein: the rear end part of the rear ring body is also connected with a rear cover, an air inlet grid is arranged on the rear cover, and a handle is also connected on the rear cover.
8. A hand-held water-gas mixing foam fire suppression injector according to claim 1 or 2 or 3, characterized in that: the outer wall of the mixer is also provided with a pressure gauge for measuring the pressure of the water flow in the annular flow passage.
9. The hand-held water vapor mixing foam fire suppression sprinkler of claim 2, wherein: and sealing rings are respectively arranged on the butt joint surfaces of the outer ring body, the middle ring body, the rear ring body, the insert and the insert runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413495.0A CN112972945B (en) | 2021-04-16 | 2021-04-16 | Hand-held type water gas mixing foam fire extinguishing sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413495.0A CN112972945B (en) | 2021-04-16 | 2021-04-16 | Hand-held type water gas mixing foam fire extinguishing sprayer |
Publications (2)
| Publication Number | Publication Date |
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| CN112972945A CN112972945A (en) | 2021-06-18 |
| CN112972945B true CN112972945B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110413495.0A Active CN112972945B (en) | 2021-04-16 | 2021-04-16 | Hand-held type water gas mixing foam fire extinguishing sprayer |
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| Country | Link |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2370488A (en) * | 1987-10-09 | 1989-04-13 | Cca Inc. | Foam fire fighting apparatus |
| CN103007472A (en) * | 2012-12-05 | 2013-04-03 | 中国人民解放军海军装备技术研究所 | Compressed air foam extinguishing agent spraying gun and method thereof |
| CN104190024A (en) * | 2014-07-31 | 2014-12-10 | 天广消防股份有限公司 | Spiral flow mixer for positive pressure metering injection type proportionally-mixing device |
| CN105169598A (en) * | 2015-07-29 | 2015-12-23 | 成都自能消防设备有限公司 | Air foam fire gun |
| CN206026937U (en) * | 2016-08-23 | 2017-03-22 | 成都自能消防设备有限公司 | From inhaling formula air bubble gun |
| KR102075290B1 (en) * | 2019-04-11 | 2020-02-07 | 주식회사 파이어스 | Fire fighting nozzle having mixing air |
| CN214713909U (en) * | 2021-04-16 | 2021-11-16 | 东莞市顶迅科技有限公司 | Hand-held water-gas mixed foam fire-extinguishing ejector |
-
2021
- 2021-04-16 CN CN202110413495.0A patent/CN112972945B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2370488A (en) * | 1987-10-09 | 1989-04-13 | Cca Inc. | Foam fire fighting apparatus |
| CN103007472A (en) * | 2012-12-05 | 2013-04-03 | 中国人民解放军海军装备技术研究所 | Compressed air foam extinguishing agent spraying gun and method thereof |
| CN104190024A (en) * | 2014-07-31 | 2014-12-10 | 天广消防股份有限公司 | Spiral flow mixer for positive pressure metering injection type proportionally-mixing device |
| CN105169598A (en) * | 2015-07-29 | 2015-12-23 | 成都自能消防设备有限公司 | Air foam fire gun |
| CN206026937U (en) * | 2016-08-23 | 2017-03-22 | 成都自能消防设备有限公司 | From inhaling formula air bubble gun |
| KR102075290B1 (en) * | 2019-04-11 | 2020-02-07 | 주식회사 파이어스 | Fire fighting nozzle having mixing air |
| CN214713909U (en) * | 2021-04-16 | 2021-11-16 | 东莞市顶迅科技有限公司 | Hand-held water-gas mixed foam fire-extinguishing ejector |
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| CN112972945A (en) | 2021-06-18 |
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