CN110975193B - Compressed air foam fluid mixing device - Google Patents
Compressed air foam fluid mixing device Download PDFInfo
- Publication number
- CN110975193B CN110975193B CN201911343789.XA CN201911343789A CN110975193B CN 110975193 B CN110975193 B CN 110975193B CN 201911343789 A CN201911343789 A CN 201911343789A CN 110975193 B CN110975193 B CN 110975193B
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- compressed air
- foam
- mixing
- pipe
- mixing cavity
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- 239000006260 foam Substances 0.000 title claims abstract description 137
- 239000012530 fluid Substances 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims description 43
- 239000007924 injection Substances 0.000 claims description 43
- 238000005192 partition Methods 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 13
- 238000005187 foaming Methods 0.000 description 7
- 210000003437 trachea Anatomy 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 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
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a compressed air foam fluid mixing device which comprises a shell, wherein one end of the shell is provided with a foam liquid input port, the other end of the shell is provided with a foam output port, the inner cavity in the middle of the shell is a mixing cavity, foam liquid guided through the foam liquid input port enters the mixing cavity, a compressed air guiding component is arranged in the mixing cavity, and the direction of guiding compressed air in the compressed air guiding component is consistent with the direction of guiding the foam liquid. The invention has the advantages of simple structure, convenient use, good quality of foam generation and the like.
Description
Technical Field
The invention mainly relates to the technical field of fire-fighting equipment, in particular to a compressed air foam fluid mixing device which is mainly applicable to the field of fire-fighting equipment.
Background
The conventional air foam generator sucks air to generate foam by using the negative pressure principle. Flowing in the pipe is a mixture of water and foam, which is sucked in air during the ejection of the foam cannon or gun to generate foam. The process of sucking air into the foam mixture is relatively disordered, the foaming degree of the water and foam extinguishing agent is difficult to reach the optimal state, the foam is formed unevenly, and even a lot of mixture liquid which is water and foam agent is sprayed out from the mixture. The utilization rate of water and foam is not high, and the fire extinguishing efficiency is not ideal.
The compressed air foam is formed by actively pressing compressed air into the foam mixture directly. It has been found through long-term practice that for a foam solution in a mixing chamber that is perpendicularly directed by compressed air from the side of the pipe, the flow pattern of the foam solution is rendered asymmetrical. The impact of air on the flow of the foaming solution results in unstable flow and velocity of the foaming solution, uneven mixing of the foaming solution with air, which all deteriorate the foaming and uniformity of the compressed air foam.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems existing in the prior art, the invention provides the compressed air foam fluid mixing device which has the advantages of simple structure, convenient use and good foam quality.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a compressed air foam fluid mixing arrangement, includes the casing, the one end of casing is equipped with foam liquid input port, and the other end is equipped with foam delivery outlet, the middle part inner chamber of casing is the mixing chamber, and foam liquid through foam liquid input port leading-in gets into the mixing chamber, be provided with compressed air and import the part in the mixing chamber, compressed air import the direction of leading-in the part of compressed air with foam liquid leading-in direction unanimous.
As a further improvement of the invention: the mixing cavity of casing is provided with compressed air injection scattered trachea, be provided with the reposition of redundant personnel hole that lets compressed air get into the mixing cavity on the compressed air injection scattered trachea, compressed air injection scattered trachea's one end is provided with compressed air inlet, and the other end is arranged along compressed gas leading-in direction.
As a further improvement of the invention: foam mixed liquid introduced through the foam liquid input port enters the mixing cavity along the axial direction of the shell, and one end, far away from the compressed air inlet, of the compressed air injection air dispersing pipe is also arranged along the axial direction of the shell.
As a further improvement of the invention: the mixing chamber is divided into more than two mixing chambers.
As a further improvement of the invention: the compressed air injection air dispersing pipe corresponds to more than two mixing chambers, and a diversion hole is formed in the compressed air injection air dispersing pipe in each mixing chamber.
As a further improvement of the invention: the aperture and/or the number of the diversion holes of each stage of mixing chamber are the same or different, and the amount of the compressed air distributed to each mixing chamber is controlled by controlling the aperture and/or the number of each stage of diversion holes.
As a further improvement of the invention: a mixing cavity partition plate is arranged between two adjacent mixing cavities, and when compressed gas and foam solution are mixed in one mixing cavity, the compressed gas and the foam solution pass through the mixing cavity partition plate and enter the next mixing cavity.
As a further improvement of the invention: the mixing cavity partition board is of an umbrella cover type structure, the middle part of the mixing cavity partition board is sleeved on the compressed air injection air dispersing pipe, a plurality of holes are formed in the panel of the mixing cavity partition board, and the holes are uniformly formed in the mixing cavity partition board and used for allowing compressed air to pass through after being mixed with foam solution.
As a further improvement of the invention: the hole is long strip-shaped, and the long strip-shaped is opened along the radial direction of the umbrella surface.
As a further improvement of the invention: the aperture and/or the number of the holes on each stage of the mixing cavity partition plate are the same or different, and the compressed air and the foam solution are uniformly mixed by controlling the aperture and/or the number of the holes of each stage.
As a further improvement of the invention: the position department of every branch flow hole all is equipped with a compressed air scattering ring, is the structural configuration of a horn mouth, and the middle part cover is located on the compressed air injection scattered trachea, the last reposition of redundant personnel hole of compressed air injection scattered trachea is located the position department of horn mouth on the compressed air scattering ring.
As a further improvement of the invention: a foam liquid scattering baffle ring is arranged at the position, close to the compressed air inlet, of the compressed air injection air dispersing pipe, and when foam liquid enters from the foam liquid inlet, the foam liquid is scattered by the foam liquid scattering baffle ring and is mixed with compressed air from the flow dividing holes in the mixing cavity to form foam.
As a further improvement of the invention: the foam liquid scattering baffle ring is in a horn mouth structure, and is sleeved on the compressed air injection air dispersing pipe, and the upper split flow hole of the compressed air injection air dispersing pipe is positioned at the horn mouth position on the foam liquid scattering baffle ring.
As a further improvement of the invention: the compressed air inlet is a section of independent pipe or is integrated with the compressed air injection air dispersing pipe.
Compared with the prior art, the invention has the advantages that:
1. The compressed air foam fluid mixing device has a simple structure and is convenient to use, compressed air and foam mixed liquid enter in the same direction, the impact of air on foam solution and pulsation generated by the impact are greatly weakened by the design of two-phase flow of the gas and the liquid in the mixing cavity, the foam solution and the compressed air are uniformly mixed, and accordingly relatively stable two-phase flow is easy to form.
2. According to the compressed air foam fluid mixing device, the design of the multistage mixing cavity and the multistage diversion holes is adopted, and the partition plate and the scattering ring are matched, so that the mixing effect of compressed air and foam liquid can be greatly improved, the quality of foam is finally improved, and the fire extinguishing effect is enhanced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structural principle of the present invention in section in a specific application example.
Fig. 3 is a schematic diagram of a front view of a separator for a mixing chamber according to the present invention in a specific application.
Fig. 4 is a schematic view of the structural principle of the side of the partition plate of the mixing chamber in the specific application example of the present invention.
Fig. 5 is a schematic view of the three-dimensional structure of a partition board of a mixing chamber in a specific application example of the invention.
Fig. 6 is a schematic diagram of the principle of the compressed air scattering ring in the embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of the schematic of fig. 6 at A-A.
Fig. 8 is a schematic diagram of the principle of the front view structure of the foam liquid scattering baffle ring in the specific application example of the invention.
Fig. 9 is a schematic cross-sectional view at B-B in fig. 8.
Fig. 10 is a schematic view of the structure of the compressed air shunt according to the present invention in a specific application example.
Fig. 11 is a schematic diagram of the working principle of the present invention in a specific application example.
Legend description:
100. A foam liquid inlet; 200. a compressed air inlet; 210. compressed air is injected into the air dispersing pipe 211, the first diversion hole; 212. a second diversion aperture; 213. a third tap hole; 300. a foam liquid scattering baffle ring; 400. a first mixing chamber; 401. a second mixing chamber; 402. a third mixing chamber; 500. a first mixing chamber partition; 501. a second mixing chamber partition; 502. a third mixing chamber partition; 503. a hole; 600. a first compressed air scattering ring; 601. a second compressed air scattering ring; 700. a housing; 800. a foam outlet; 1000. introducing foam liquid; 2000. compressed air is introduced; 3000. the flow direction of the foam liquid; 4000. compressed air flows; 5000. primary mixing of foam; 6000. secondary mixing of the foam; 7000. mixing foam for three times; 8000. the foam was mixed four times.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
As shown in fig. 1 to 11, the compressed air foam fluid mixing device of the present invention comprises a housing 700, wherein one end of the housing 700 is provided with a foam liquid input port 100, the other end is provided with a foam output port 800, and a middle inner cavity of the housing 700 is a mixing cavity; foam mixed liquid introduced through the foam liquid input port 100 enters the mixing chamber along the axial direction of the housing 700; the invention is provided with the compressed air injection air dispersing pipe 210 in the mixing cavity of the shell 700, the compressed air injection air dispersing pipe 210 is provided with the diversion hole for allowing compressed air to enter the mixing cavity, one end of the compressed air injection air dispersing pipe 210 is provided with the compressed air inlet 200, and the other end of the compressed air injection air dispersing pipe is arranged along the axial direction of the shell 700, so that the compressed air and foam mixed liquid enter in the same direction, the impact of air on foam solution and the pulsation generated by the impact are greatly weakened by the design of the same-direction flow of the air and the liquid in the mixing cavity, the uniform mixing of the foam solution and the compressed air is facilitated, the relatively stable two-phase flow is easy to form, and the foam finally formed by the technical scheme of the invention is uniform and fine, and the fire extinguishing efficiency of the foam and water is greatly enhanced.
In a specific application example, the invention further provides a foam liquid scattering baffle ring 300 at a position on the compressed air injection diffusing pipe 210 near the compressed air inlet 200, when the foam liquid enters from the foam liquid inlet 100, the foam liquid is scattered by the foam liquid scattering baffle ring 300, and the foam liquid is mixed with the compressed air from the flow dividing hole in the mixing cavity, and then the foam is formed. Referring to fig. 8 and 9, the foam liquid scattering baffle ring 300 is in a bell mouth structure, and is sleeved on the compressed air injection and diffusion pipe 210, the position of the bell mouth on the foam liquid scattering baffle ring 300 is located at the position of the branching hole on the compressed air injection and diffusion pipe 210, and the compressed air coming out of the branching hole can better form scattering at the position, so that better mixing of the foam liquid and the compressed air is facilitated, and finer foam is formed. It can be seen that there are two functions of the foam liquid scattering baffle ring 300, and the first can use the horn-shaped shape thereof to change the flowing direction of the foam liquid therein to form a divergent state; the second can utilize the diversion hole in its bell mouth, let compressed air also become the divergent state.
In a specific application example, the present invention further divides the mixing chamber into more than two mixing chambers, as in this example the mixing chamber is divided into: it is understood that the number of mixing chambers may be determined according to the length of the entire housing 700, the foam yield, etc. in practical applications, and thus, it is within the scope of the present invention.
When there are more than two mixing chambers, the compressed air injection diffusing pipe 210 corresponds to the mixing chambers, and a diversion hole is provided on the compressed air injection diffusing pipe 210 in each mixing chamber, for example, in this example, a first diversion hole 211, a second diversion hole 212, and a third diversion hole 213 are provided on the compressed air injection diffusing pipe 210 corresponding to the first mixing chamber 401, the second mixing chamber 402, and the third mixing chamber 403. The compressed air is uniformly mixed with the foam solution when passing through each of the diversion holes.
The apertures and/or the number of the flow dividing holes of each stage of mixing chamber may be the same or different for specific applications. By controlling the aperture and/or number of each flow dividing aperture, the amount of compressed air that is distributed to each mixing chamber can be made more uniform as the compressed air enters the mixing chamber.
When more than two mixing chambers are provided, a mixing chamber baffle is arranged between two adjacent mixing chambers, and when compressed gas and foam solution are mixed in one mixing chamber, the compressed gas and the foam solution pass through the mixing chamber baffle to enter the next mixing chamber. As in the present example, corresponding to the first mixing chamber 401, the second mixing chamber 402, and the third mixing chamber 403, a first mixing chamber partition 500 is provided between the first mixing chamber 401 and the second mixing chamber 402, a second mixing chamber partition 501 is provided between the second mixing chamber 402 and the third mixing chamber 403, and a third mixing chamber partition 502 is provided at the outlet end of the third mixing chamber 403.
The function of the mixing chamber partition is to separate adjacent chambers and allow the compressed gas to pass through after mixing with the foam solution and into the next mixing chamber. In this example, referring to fig. 3, 4 and 5, the mixing chamber partition board is of an umbrella cover structure, the middle part of the mixing chamber partition board is sleeved on the compressed air injection air dispersing pipe 210, a plurality of holes 503 are formed in the panel of the mixing chamber partition board, the holes 503 are uniformly formed in the mixing chamber partition board and used for allowing compressed air to pass through after being mixed with foam solution, and the uniform holes 503 can enable the foam solution to be better mixed with the compressed air again. The shape of the hole 503 may be selected according to actual needs, and may be an elongated shape, a circular shape, an oval shape, or the like, as long as the actual needs are satisfied. In this example, the hole 503 is elongated, and the elongated shape is opened along the radial direction of the canopy. It will be appreciated that other configurations of the mixing chamber baffle are within the scope of the present invention.
The apertures and/or the number of apertures 503 in each stage of mixing chamber baffles may be the same or different for a particular application. By controlling the pore size and/or number of each stage of pores 503, the compressed air may be more uniformly mixed with the foam solution.
When more than two mixing chambers are provided, referring to fig. 6 and 7, a compressed air scattering ring is disposed at the position of each diversion hole, for example, a first compressed air scattering ring 600 and a second compressed air scattering ring 601, the structures of which are basically consistent with those of the foam liquid scattering baffle ring 300, and the two mixing chambers are also in a flare structure, which is sleeved on the compressed air injection air dispersing pipe 210, the compressed air injection air dispersing pipe 210 is provided with a diversion hole at the position of the flare on the compressed air scattering ring 210, so that the compressed air coming out from the diversion hole can better form scattering at the position, thereby being beneficial to better mixing of the foam liquid and the compressed air and forming finer foam.
In a specific application example, the foaming solution inlet 100 is operatively connected to the foaming solution mixing zone.
In a specific application example, the compressed air inlet 200 is operatively connected to a compressed air injection diffuser 210. The compressed air inlet 200 may be a separate tube or may be integral with the compressed air injection diffuser 210.
Referring to fig. 11, the sequence in the figure is: foam liquid 1000, compressed air 2000, foam liquid flow direction 3000, compressed air flow direction 4000, primary mixed foam 5000, secondary mixed foam 6000, tertiary mixed foam 7000 and quaternary mixed foam 8000 are introduced. The working principle of the invention is as follows: in use, in this example, the foam solution is introduced into the cavity of the housing 700 through the foam solution inlet 100, and the compressed air is introduced into the compressed air injection diffuser 210 through the compressed air inlet 200. In the first mixing chamber 400, the compressed air is mixed with the foam solution after passing through the first diversion holes 211 and the foam liquid scattering baffle ring 300, and then enters the second mixing chamber 401 after passing through the first mixing chamber baffle 500; similarly, in the second mixing chamber 401, the compressed air passes through the second diversion hole 212, is mixed with the mixed solution from the first mixing chamber 400 again, and then passes through the second mixing chamber partition 501 and enters the third mixing chamber 402; in the third mixing chamber 402, the compressed air passes through the third diversion hole 213, is mixed with the mixed solution from the second mixing chamber 401 again, and is sent out through the third mixing chamber partition 502; after three times of mixing, finer and more uniform foam is formed, and finally, the foam is output through a foam output port 800.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (6)
1. The compressed air foam fluid mixing device comprises a shell (700), wherein one end of the shell (700) is provided with a foam fluid input port (100), the other end of the shell is provided with a foam output port (800), the inner cavity in the middle of the shell (700) is a mixing cavity, foam fluid guided through the foam fluid input port (100) enters the mixing cavity, and the compressed air foam fluid mixing device is characterized in that a compressed air guiding component is arranged in the mixing cavity, and the direction of guiding compressed air in the compressed air guiding component is consistent with the direction of guiding the foam fluid;
a compressed air injection air dispersing pipe (210) is arranged in the mixing cavity of the shell (700), a diversion hole for allowing compressed air to enter the mixing cavity is formed in the compressed air injection air dispersing pipe (210), a compressed air inlet (200) is formed in one end of the compressed air injection air dispersing pipe (210), and the other end of the compressed air injection air dispersing pipe is arranged along the direction of compressed air introduction;
the mixing cavity is divided into more than two mixing cavities; the compressed air scattering rings are arranged at the positions of the diversion holes, are in a horn-shaped structure, and are sleeved on the compressed air injection air dispersing pipe (210), and the diversion holes on the compressed air injection air dispersing pipe (210) are positioned at the positions of the horn-shaped openings on the compressed air scattering rings (210);
A foam liquid scattering baffle ring (300) is arranged at a position, close to the compressed air inlet (200), on the compressed air injection diffusing pipe (210), and when foam liquid enters from the foam liquid inlet (100), the foam liquid is scattered by the foam liquid scattering baffle ring (300) and is mixed with compressed air from the flow dividing hole in the mixing cavity to form foam;
The foam liquid scattering baffle ring (300) is in a horn-shaped structure, is sleeved on the compressed air injection diffusing pipe (210), and is positioned at the horn-shaped position of the foam liquid scattering baffle ring (300) in the upper splitting hole of the compressed air injection diffusing pipe (210);
The compressed air injection air dispersing pipe (210) corresponds to more than two mixing chambers, and a diversion hole is formed in the compressed air injection air dispersing pipe (210) in each mixing chamber;
A mixing cavity partition board is arranged between two adjacent mixing cavities, and when compressed gas and foam solution are mixed in one mixing cavity, the compressed gas and foam solution pass through the mixing cavity partition board and enter the next mixing cavity;
The mixing cavity partition board is of an umbrella cover type structure, the middle part of the mixing cavity partition board is sleeved on the compressed air injection and diffusion pipe (210), a plurality of holes (503) are formed in the panel of the mixing cavity partition board, and the holes (503) are uniformly formed in the mixing cavity partition board and used for allowing compressed air to pass through after being mixed with foam solution.
2. The compressed air foam fluid mixing device according to claim 1, wherein the foam mixture introduced through the foam liquid inlet (100) enters the mixing chamber in the axial direction of the housing (700), and the end of the compressed air injection diffuser pipe (210) remote from the compressed air inlet (200) is also arranged in the axial direction of the housing (700).
3. The compressed air foam fluid mixing device of claim 2, wherein the aperture and/or number of the flow dividing holes of each stage of mixing chamber is the same or different, and the amount of compressed air distributed to each mixing chamber is controlled by controlling the aperture and/or number of each stage of flow dividing holes.
4. A compressed air foam fluid mixing device according to claim 3, wherein the holes (503) are elongated and open in the radial direction of the canopy.
5. A compressed air foam fluid mixing apparatus according to claim 3, wherein the apertures and/or the number of the apertures (503) in each stage of the mixing chamber partition are the same or different, and the apertures and/or the number of the apertures (503) in each stage are controlled so that the compressed air and the foam solution are uniformly mixed.
6. The compressed air foam fluid mixing device according to claim 1, wherein the compressed air inlet (200) is a separate pipe or is integrated with the compressed air injection diffuser pipe (210).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343789.XA CN110975193B (en) | 2019-12-24 | 2019-12-24 | Compressed air foam fluid mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343789.XA CN110975193B (en) | 2019-12-24 | 2019-12-24 | Compressed air foam fluid mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110975193A CN110975193A (en) | 2020-04-10 |
| CN110975193B true CN110975193B (en) | 2024-05-28 |
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ID=70075963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911343789.XA Active CN110975193B (en) | 2019-12-24 | 2019-12-24 | Compressed air foam fluid mixing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110975193B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115350426B (en) * | 2022-08-31 | 2023-07-07 | 徐工消防安全装备有限公司 | Fire-fighting foam foaming device, fire-fighting foam foaming system and foaming method |
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| CN2460131Y (en) * | 2000-11-29 | 2001-11-21 | 北京市昌平县亚东金属结构厂 | Middle-low multiple foam generator |
| CA2480397A1 (en) * | 2003-09-04 | 2005-03-04 | Sunbeam Products, Inc. | Fluid mixing device and dispensing system |
| CN101754785A (en) * | 2007-04-27 | 2010-06-23 | Sogepi有限公司 | Improved compressed air foam technology |
| CN101890253A (en) * | 2010-06-28 | 2010-11-24 | 濮阳泓天威药业有限公司 | Extraction multi-chamber mixer used in antibiotic production |
| CN103028333A (en) * | 2012-12-04 | 2013-04-10 | 北京中卓时代消防装备科技有限公司 | High-efficient foaming device for compressed air A-type foams |
| CN207632522U (en) * | 2017-10-27 | 2018-07-20 | 南方科技大学 | Micro-nano bubble generator |
| CN108635702A (en) * | 2018-05-16 | 2018-10-12 | 东华大学 | Foam solution mixing generating means in a kind of compressed air foam fire-extinguishing system |
| CN212700173U (en) * | 2019-12-24 | 2021-03-16 | 磐龙安全技术有限公司 | Compressed air foam fluid mixing device |
-
2019
- 2019-12-24 CN CN201911343789.XA patent/CN110975193B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2460131Y (en) * | 2000-11-29 | 2001-11-21 | 北京市昌平县亚东金属结构厂 | Middle-low multiple foam generator |
| CA2480397A1 (en) * | 2003-09-04 | 2005-03-04 | Sunbeam Products, Inc. | Fluid mixing device and dispensing system |
| CN101754785A (en) * | 2007-04-27 | 2010-06-23 | Sogepi有限公司 | Improved compressed air foam technology |
| CN101890253A (en) * | 2010-06-28 | 2010-11-24 | 濮阳泓天威药业有限公司 | Extraction multi-chamber mixer used in antibiotic production |
| CN103028333A (en) * | 2012-12-04 | 2013-04-10 | 北京中卓时代消防装备科技有限公司 | High-efficient foaming device for compressed air A-type foams |
| CN207632522U (en) * | 2017-10-27 | 2018-07-20 | 南方科技大学 | Micro-nano bubble generator |
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| CN110975193A (en) | 2020-04-10 |
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