CN112546498A - Gas-liquid proportional mixer capable of generating foam rapidly in real time - Google Patents
Gas-liquid proportional mixer capable of generating foam rapidly in real time Download PDFInfo
- Publication number
- CN112546498A CN112546498A CN202011636427.2A CN202011636427A CN112546498A CN 112546498 A CN112546498 A CN 112546498A CN 202011636427 A CN202011636427 A CN 202011636427A CN 112546498 A CN112546498 A CN 112546498A
- Authority
- CN
- China
- Prior art keywords
- foam
- gas
- liquid
- mixing chamber
- proportional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 128
- 239000007788 liquid Substances 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- A62C5/022—Making of fire-extinguishing materials immediately before use of foam with air or gas present as such
- A62C5/024—Apparatus in the form of pipes
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
-
- 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
Abstract
The invention discloses a gas-liquid proportional mixer capable of quickly generating foam in real time, which is provided with a mixer body (1), wherein water and foam can be directly mixed in a foam proportional mixing chamber in proportion, and then the foam liquid after being mixed in proportion is foamed in a gas-liquid mixing chamber through gas impact to form uniform fire-fighting foam.
Description
Technical Field
The invention relates to a gas-liquid proportional mixer for rapidly generating foam in real time.
Background
The gas flow, the liquid flow and the foam flow in the existing foam fire extinguishing equipment need to be in a certain proportion when being mixed, and a servo motor needs to be controlled by a sensor when the flow of the substances is adjusted, so that the cost is higher. Or the mixing is realized through the premixed liquid, but the premixed foam liquid is easy to deteriorate after being placed for a long time, so that great waste is caused. In addition, when gas and liquid are mixed, the gas and liquid may be unbalanced in the pipe network.
Disclosure of Invention
The invention provides a gas-liquid proportional mixer capable of quickly generating foam in real time, which not only can quickly generate foam in real time and has simple structure and convenient operation, but also can avoid the foam liquid from deteriorating after being placed for a long time, thereby saving the cost.
The invention adopts the following technical scheme: a gas-liquid proportional mixer capable of quickly generating foam in real time is provided with a mixer body, one end of the mixer body is connected with an end cover, the end cover is axially provided with a water injection hole, a gas-liquid mixing cavity is axially arranged in the mixer body, a foam mixing generator is arranged between the end cover and the gas-liquid mixing cavity, the foam mixing generator is internally and axially provided with a foam proportional mixing cavity, a water outlet of a water pump is communicated with the water injection hole, the water injection hole is communicated with one side of the foam proportional mixing cavity, the other side of the foam proportional mixing cavity is communicated with one side of the gas-liquid mixing cavity, a foam liquid outlet is positioned at the other side of the gas-liquid mixing cavity, the outer part of the mixer body is provided with a foam inlet, a foam outlet of a foam storage container is communicated with a foam inlet of the mixer body, and the foam inlet is, the external portion of blender body still is equipped with compressed air inlet, and the gas outlet and the compressed air inlet of compressed air source storage container are linked together, and compressed air inlet is linked together through conveying line II and gas-liquid mixture chamber, and the foam liquid export is linked together through pipeline and foam rifle.
The water injection hole be located the central point of end cover and put, foam proportion mixing chamber is located the central point of foam mixing generator and puts, and gas-liquid mixing chamber is located blender body central point, the center of water injection hole, the center of foam proportion mixing chamber and the center of gas-liquid mixing chamber are on same straight line.
The utility model discloses a foam mixing generator, including foam mixing generator, end cover, stopper card, clearance I, clearance II, the combination forms conveying pipeline I after communicating between clearance I and the clearance II, the foam import communicates with each other with the foam proportional mixing cavity through clearance I and clearance II in proper order.
The conveying pipeline II comprises an air groove formed in the outer wall of the foam mixing generator and an air hole formed in the main body of the foam mixing generator, the air inlet end of the air hole is located in the air groove, the air outlet end of the air hole is communicated with the air-liquid mixing chamber, and the compressed air inlet is communicated with the air-liquid mixing chamber through the air groove and the air hole in sequence. The water injection hole is a horn-shaped hole, the taper of the horn-shaped hole is 1-30 degrees, the diameter of one end of the water injection hole is larger than that of the other end of the water injection hole, and the aperture size of the other end of the water injection hole is 2-80 mm. The inner diameter of the gas-liquid mixing chamber is 40-400 mm. The inner diameter of the foam proportion mixing chamber is 3-120 mm. The length of the flow area of the air groove is 4-1600mm2. The number of the air holes (13) is 2-8, the aperture is 2-20mm, and the direction of the air flow discharged from the air holes is spiral or inclined at an intersecting angle. And a sealing nylon ring is arranged between the end cover and the mixer body. An O-shaped ring is arranged between the foam mixing generator and the mixer body.
The invention has the following beneficial effects: after the technical scheme is adopted, water and foam can be directly proportioned and mixed in the foam proportion mixing chamber, and then the proportioned and mixed foam liquid is foamed in the gas-liquid mixing chamber through gas impact to form uniform fire-fighting foam.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the internal flow direction of the present invention.
FIG. 3 is a schematic view of another cross-sectional view of the present invention.
Detailed Description
In fig. 1, 2 and 3, the invention provides a gas-liquid proportional mixer for rapidly generating foam in real time, which comprises a mixer body 1, wherein an end cover 2 is connected to an end of one end of the mixer body 1, a water injection hole 3 is axially arranged on the end cover 2, the water injection hole 3 is positioned at the central position of the end cover 2, the water injection hole 3 is a trumpet-shaped hole, the taper of the trumpet-shaped hole is 1-30 degrees, the diameter of one end of the water injection hole 3 is larger than that of the other end, the taper of the trumpet-shaped hole of the embodiment is 12.5 degrees, the aperture size of the other end of the water injection hole 3 is 2-80mm, the aperture size of the other end of the water injection hole 3 of the embodiment is 10mm, a gas-liquid mixing chamber 4 is axially arranged in the mixer body 1, the gas-liquid mixing chamber 4 is positioned at the central position of the mixer body 1, the inner diameter of the gas-liquid, a foam mixing generator 5 is arranged between the end cover 2 and the gas-liquid mixing chamber 4, a foam proportion mixing chamber 6 is axially arranged in the foam mixing generator 5, the foam proportion mixing chamber 6 is positioned at the central position of the foam mixing generator 5, the inner diameter of the foam proportion mixing chamber 6 is 3-120mm, the inner diameter of the foam proportion mixing chamber 6 of the embodiment is 20mm, the center of the water injection hole 3, the center of the foam proportion mixing chamber 6 and the center of the gas-liquid mixing chamber 4 are positioned on the same straight line, the water outlet of the water pump is communicated with the water injection hole 3, the water injection hole 3 is communicated with one side of the foam proportion mixing chamber 6, the other side of the foam proportion mixing chamber 6 is communicated with one side of the gas-liquid mixing chamber 4, a foam liquid outlet 16 is positioned at the other side of the gas-liquid mixing chamber 4 anda foam inlet 7 is arranged outside, the inner diameter of the foam inlet 7 of the mixer body 1 is 2-12mm, the inner diameter of the foam inlet 7 of the mixer body 1 of the embodiment is 12mm, a foam outlet of a foam storage container is communicated with the foam inlet 7 of the mixer body 1, the foam inlet 7 is communicated with a foam proportional mixing chamber 6 through a conveying pipeline I, a compressed air inlet 8 is further arranged outside the mixer body 1, an air outlet of a compressed air source storage container is communicated with the compressed air inlet 8, the compressed air inlet 8 is communicated with a gas-liquid mixing chamber 4 through a conveying pipeline II, one end face of the foam mixing generator 5 is opposite to one end face of the end cover 2, a plurality of limit blocks 9 are uniformly distributed on one end face of the foam mixing generator 5, four limit blocks 9 are uniformly distributed on one end face of the foam mixing generator 5 of the embodiment, a plurality of limiting grooves are uniformly distributed on one end face of the end cover 2, four limiting grooves are uniformly distributed on one end face of the end cover 2 in the embodiment, four limiting blocks 9 correspond to the four limiting grooves, the foam mixing generator 5 is clamped in the limiting grooves through the limiting blocks 9 to form limiting fit with the end cover 2, a gap I10 is arranged between one end face of the foam mixing generator 5 and one end face of the end cover 2, a gap II 11 is arranged between two adjacent limiting blocks 9, the gap I10 and the gap II 11 are communicated and then combined to form a conveying pipeline I, the foam inlet 7 is communicated with the foam proportional mixing chamber 6 through the gap I10 and the gap II 11 in sequence, the conveying pipeline II comprises an air groove 12 formed in the outer wall of the foam mixing generator and an air hole 13 formed in the main body of the foam mixing generator, the air inlet end of the air hole 13 is located in the air groove 12, and the flow area of the air groove 12 is 4-1600 mm.2The flow area of the air groove 12 of this embodiment is 100mm2. 2~8 of gas pocket (13) equipartition, aperture 2-20mm, the gas pocket of this embodiment is 2, and the aperture is 6mm, and the air current direction is the spiral mode, and the end of giving vent to anger of gas pocket 13 communicates with each other with gas-liquid mixing chamber 4, and compressed air inlet 8 communicates with each other with gas-liquid mixing chamber 4 through air duct 12 and gas pocket 13 in proper order, and foam liquid export 16 is linked together through pipeline and foam rifle, end cover 2 and blender body 1 between be equipped with sealed nylon ring 14, foam mixing generator 5 and blender body 1 between be equipped with O type circle 15.
The working process of the invention is as follows: the water pump pumps water out and then discharges the water into the foam proportion mixing chamber 6 through the water injection hole 3, foam of the foam storage container is discharged into the foam proportion mixing chamber 6 after passing through the foam outlet, the foam inlet 7 and the conveying pipeline I, foam liquid is formed after the foam and the water in the foam proportion mixing chamber 6 are mixed, the foam liquid formed after the foam in the foam proportion mixing chamber 6 and the water are mixed is discharged into the gas-liquid mixing chamber 4, meanwhile, gas of the compressed gas source storage container sequentially passes through the gas outlet, the compressed air inlet 8 and the conveying pipeline II and enters the gas-liquid mixing chamber 4, the mixed foam liquid is foamed after the gas in the gas-liquid mixing chamber 4 is impacted to form foam for fire extinguishing, and the foam for fire extinguishing is sprayed out through the foam gun.
Claims (10)
1. A gas-liquid proportional mixer capable of generating foam rapidly in real time is characterized by being provided with a mixer body (1), an end cover (2) is connected to the end portion of one end of the mixer body (1), a water injection hole (3) is axially formed in the end cover (2), a gas-liquid mixing chamber (4) is axially formed in the mixer body (1), a foam mixing generator (5) is arranged between the end cover (2) and the gas-liquid mixing chamber (4), a foam proportional mixing chamber (6) is axially formed in the foam mixing generator (5), a water outlet of a water pump is communicated with the water injection hole (3), the water injection hole (3) is communicated with one side of the foam proportional mixing chamber (6), the other side of the foam proportional mixing chamber (6) is communicated with one side of the gas-liquid mixing chamber (4), a foam liquid outlet (16) is formed in the other side of the gas-liquid mixing chamber (4), a foam inlet (7) is formed in the outer portion of the mixer, the foam outlet of the foam storage container is communicated with the foam inlet (7) of the mixer body (1), the foam inlet (7) is communicated with the foam proportional mixing chamber (6) through a conveying pipeline I, a compressed air inlet (8) is further arranged outside the mixer body (1), the air outlet of the compressed air source storage container is communicated with the compressed air inlet (8), the compressed air inlet (8) is communicated with the gas-liquid mixing chamber (4) through a conveying pipeline II, and the foam liquid outlet (16) is communicated with the foam gun through a conveying pipeline.
2. The gas-liquid proportional mixer for rapidly generating foam in real time according to claim 1, wherein the water injection hole (3) is located at the center of the end cover (2), the foam proportional mixing chamber (6) is located at the center of the foam mixing generator (5), the gas-liquid mixing chamber (4) is located at the center of the mixer body (1), and the centers of the water injection hole (3), the foam proportional mixing chamber (6) and the gas-liquid mixing chamber (4) are on the same straight line.
3. The gas-liquid proportional mixer for rapidly generating foam in real time according to claim 1, wherein an end face of the foam mixing generator (5) is opposite to an end face of the end cover (2), a plurality of limiting blocks (9) are uniformly distributed on the end face of the foam mixing generator (5), a plurality of limiting grooves are uniformly distributed on the end face of the end cover (2), the limiting blocks (9) correspond to the limiting grooves, the foam mixing generator (5) is clamped in the limiting grooves through the limiting blocks (9) to form limiting fit with the end cover (2), a gap I (10) is arranged between the end face of the foam mixing generator (5) and the end face of the end cover (2), a gap II (11) is arranged between two adjacent limiting blocks (9), the gap I (10) and the gap II (11) are communicated and then combined to form a conveying pipeline I, and the foam inlet (7) sequentially passes through the gap I (10) and the gap II (11) to form a foam proportional mixing chamber (6) And communicating.
4. The gas-liquid proportional mixer for rapidly generating foam in real time according to claim 1, wherein the conveying pipeline II comprises an air groove (12) formed in the outer wall of the foam mixing generator and an air hole (13) formed in the main body of the foam mixing generator, the air inlet end of the air hole (13) is positioned in the air groove (12), the air outlet end of the air hole (13) is communicated with the gas-liquid mixing chamber (4), and the compressed air inlet (8) is communicated with the gas-liquid mixing chamber (4) through the air groove (12) and the air hole (13) in sequence.
5. The gas-liquid proportional mixer for rapidly generating foam in real time according to claim 1, wherein the water injection hole (3) is a trumpet-shaped hole, the taper of the trumpet-shaped hole is 1-30 degrees, the diameter of one end of the water injection hole (3) is larger than that of the other end of the water injection hole, the aperture size of the other end of the water injection hole (3) is 2-80mm, and the water flow rate is 20-4000L/min.
6. Proportional gas-liquid mixer for the real-time rapid generation of foam according to claim 1, characterized in that the internal diameter of the gas-liquid mixing chamber (4) is 40-400 mm.
7. Gas-liquid proportional mixer for the real-time rapid generation of foam according to claim 1, characterized in that the internal diameter of said foam proportional mixing chamber (6) is 3-120 mm.
8. Proportional gas-liquid mixer for the real-time rapid production of foam according to claim 1, characterised in that the flow area of the gas channel (12) is 4-1600mm22-8 air holes (13) are uniformly distributed, the aperture is 2-20mm, and the direction of the air flow discharged from the air holes is spiral or inclined at an intersecting angle.
9. Gas-liquid proportional mixer for the real-time rapid generation of foam according to claim 1, characterized in that a sealing nylon ring (14) is arranged between the end cap (2) and the mixer body (1).
10. Gas-liquid proportional mixer for the real-time and rapid generation of foam according to claim 1, characterized in that an O-ring (15) is arranged between the foam mixing generator (5) and the mixer body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636427.2A CN112546498B (en) | 2020-12-31 | 2020-12-31 | Gas-liquid ratio mixer capable of generating foam rapidly in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636427.2A CN112546498B (en) | 2020-12-31 | 2020-12-31 | Gas-liquid ratio mixer capable of generating foam rapidly in real time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112546498A true CN112546498A (en) | 2021-03-26 |
| CN112546498B CN112546498B (en) | 2023-11-10 |
Family
ID=75035078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011636427.2A Active CN112546498B (en) | 2020-12-31 | 2020-12-31 | Gas-liquid ratio mixer capable of generating foam rapidly in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112546498B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115350427A (en) * | 2022-08-31 | 2022-11-18 | 徐工消防安全装备有限公司 | Fire-fighting foam foaming device, system and foaming method |
| CN115364407A (en) * | 2022-08-31 | 2022-11-22 | 徐工消防安全装备有限公司 | Telescopic fire-fighting foam foaming device, system and foaming method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817906Y (en) * | 2005-08-18 | 2006-09-20 | 公安部上海消防研究所 | Distributed fine fog fire extinguisher of multi-component |
| CN201356933Y (en) * | 2009-03-06 | 2009-12-09 | 上海芜津消防设备有限公司 | Class-A foam fire extinguishing device with improved air source device |
| CN202263321U (en) * | 2011-06-24 | 2012-06-06 | 陈鹏 | Function combination type foam generator |
| CN202951591U (en) * | 2012-11-26 | 2013-05-29 | 宁波恒瑞机械有限公司 | Mixed liquid foaming device |
| CN203577194U (en) * | 2013-11-19 | 2014-05-07 | 北京中卓时代消防装备科技有限公司 | Foam proportionally-mixing unit of airport fire fighting truck |
| CN106284572A (en) * | 2015-06-08 | 2017-01-04 | 松下家电研究开发（杭州）有限公司 | A kind of foam-making apparatus |
| CN206979873U (en) * | 2017-06-29 | 2018-02-09 | 成都启特安全技术有限责任公司 | A kind of Liqiud-gas mixing device |
| CN207959406U (en) * | 2018-01-09 | 2018-10-12 | 松下家电研究开发（杭州）有限公司 | A kind of foam maker and toilet seat |
| CN108771808A (en) * | 2018-07-27 | 2018-11-09 | 赵晔 | Hydraulic piston formula froth ratio mixed method and foam proportioner |
| CN215608929U (en) * | 2020-12-31 | 2022-01-25 | 泰州市玉林动力机械有限公司 | Gas-liquid proportional mixer for real-time and rapid foam generation |
-
2020
- 2020-12-31 CN CN202011636427.2A patent/CN112546498B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817906Y (en) * | 2005-08-18 | 2006-09-20 | 公安部上海消防研究所 | Distributed fine fog fire extinguisher of multi-component |
| CN201356933Y (en) * | 2009-03-06 | 2009-12-09 | 上海芜津消防设备有限公司 | Class-A foam fire extinguishing device with improved air source device |
| CN202263321U (en) * | 2011-06-24 | 2012-06-06 | 陈鹏 | Function combination type foam generator |
| CN202951591U (en) * | 2012-11-26 | 2013-05-29 | 宁波恒瑞机械有限公司 | Mixed liquid foaming device |
| CN203577194U (en) * | 2013-11-19 | 2014-05-07 | 北京中卓时代消防装备科技有限公司 | Foam proportionally-mixing unit of airport fire fighting truck |
| CN106284572A (en) * | 2015-06-08 | 2017-01-04 | 松下家电研究开发（杭州）有限公司 | A kind of foam-making apparatus |
| CN206979873U (en) * | 2017-06-29 | 2018-02-09 | 成都启特安全技术有限责任公司 | A kind of Liqiud-gas mixing device |
| CN207959406U (en) * | 2018-01-09 | 2018-10-12 | 松下家电研究开发（杭州）有限公司 | A kind of foam maker and toilet seat |
| CN108771808A (en) * | 2018-07-27 | 2018-11-09 | 赵晔 | Hydraulic piston formula froth ratio mixed method and foam proportioner |
| CN215608929U (en) * | 2020-12-31 | 2022-01-25 | 泰州市玉林动力机械有限公司 | Gas-liquid proportional mixer for real-time and rapid foam generation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115350427A (en) * | 2022-08-31 | 2022-11-18 | 徐工消防安全装备有限公司 | Fire-fighting foam foaming device, system and foaming method |
| CN115364407A (en) * | 2022-08-31 | 2022-11-22 | 徐工消防安全装备有限公司 | Telescopic fire-fighting foam foaming device, system and foaming method |
| CN115350427B (en) * | 2022-08-31 | 2023-12-15 | 徐工消防安全装备有限公司 | Fire fighting foam foamer, system and foaming method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112546498B (en) | 2023-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215608929U (en) | Gas-liquid proportional mixer for real-time and rapid foam generation | |
| CN112546498A (en) | Gas-liquid proportional mixer capable of generating foam rapidly in real time | |
| JPS6434459A (en) | Two fluid atomizer | |
| DE60106815D1 (en) | Oil atomiser | |
| CN216295754U (en) | Spray gun and spraying system for flue gas denitration | |
| CN207152915U (en) | A kind of self-priming air foam rifle | |
| CN207187486U (en) | Reducing agent sprayer unit for denitrating flue gas | |
| CN101306233B (en) | Rotor axis switching bi-functional spray gun | |
| CN218220869U (en) | Double-layer jet fire-fighting foam foaming and jetting device | |
| CN206836015U (en) | A kind of medicine mixer of jetting type spiral outlet | |
| CN112546499B (en) | Portable compressed air foam equipment of putting out a fire | |
| CN216572509U (en) | Gas-liquid uniform mixing device | |
| CN215608930U (en) | Movable compressed air foam fire extinguishing equipment | |
| CN107469608A (en) | Reducing agent sprayer unit for denitrating flue gas | |
| CN211359251U (en) | Jet-suction type atomizing spray gun | |
| CN201208463Y (en) | Rotor axis switching bifunctional spray gun | |
| CN205174396U (en) | Spray gun of large -traffic organic waste liquid | |
| CN211836961U (en) | Ultrasonic atomization dry fog door curtain | |
| CN219540636U (en) | Double-fluid nozzle gas seat | |
| CN219588936U (en) | Bubble atomizing nozzle based on multichannel series venturi tube foaming | |
| CN213727223U (en) | Line formula spray gun | |
| CN206026934U (en) | Straight tube type air bubble gun | |
| CN213377299U (en) | Rapid gas-liquid mixing nozzle | |
| CN210171736U (en) | Novel blasting spray wide-mouth nozzle | |
| CN210138397U (en) | Gas-liquid mixing fire-fighting lance with adjustable jet state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |