CN106492377B - Foam fire-fighting extinguishing device and application thereof - Google Patents
Foam fire-fighting extinguishing device and application thereof Download PDFInfo
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- CN106492377B CN106492377B CN201611252210.5A CN201611252210A CN106492377B CN 106492377 B CN106492377 B CN 106492377B CN 201611252210 A CN201611252210 A CN 201611252210A CN 106492377 B CN106492377 B CN 106492377B
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- 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
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- 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
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a foam fire-fighting fire-extinguishing device and application thereof, wherein the foam fire-fighting fire-extinguishing device comprises an axial flow fan, an annular spraying body and an annular hollow foaming screen, wherein the annular spraying body comprises a hollow cylinder and a plurality of spraying nozzles, the outer wall of the hollow cylinder is provided with a foam mixed liquid inlet, the inlet end of the foam mixed liquid inlet is communicated with an external foam mixed liquid conveying pipe, and the outlet end of the foam mixed liquid inlet is communicated with the spraying nozzles; the hollow cylinder is fixedly connected with the air outlet end of the axial flow fan, and the annular hollow foaming sieve net is embedded in the hollow cavity of the hollow cylinder and is spaced from the inner wall of the hollow cylinder; and the hollow cylinder, the annular hollow foaming screen and the air outlet of the axial flow fan are all positioned on the same central axis. The invention can generate high-multiple foam, can also carry out long-range injection, and can be arranged on a fire truck, a fire-fighting robot and a lifting arm support to efficiently and quickly extinguish oil fires.
Description
Technical Field
The invention relates to a foam fire-fighting device and application thereof, belonging to the technical field of fire-fighting equipment.
Background
In the case of oil-type fires, particularly tank-type fires, the fire is generally extinguished by means of a foam spray. Because foam is a small volume of air bubbles surrounded by air on their surface. The foam density is far less than the density of the oil product, so the foam can float on the surface of the oil product to form a continuous foam covering layer, and the fire extinguishment is realized under the cooling, suffocation and blocking effects.
Currently, foam guns (guns) or foam generators are commonly used to generate foam.
The principle of foam gun (gun) for spraying foam is as follows: the foam mixed liquid pressurized by the liquid supply equipment is conveyed to a foam gun (gun) through a pipeline, negative pressure is formed when the foam mixed liquid passes through a foam spray pipe of the foam gun (gun), so that air is sucked, and the air and the foam mixed liquid are mixed in the foam spray pipe to form foam for spraying out. Its advantages are long range, low foaming times and not easy formation of completely covered foam layer on fuel surface. In addition, because of a certain range, the flow rate of the foam mixed liquid is often large, and the foam mixed liquid is injected into the fuel tank, a water cushion layer is easily formed at the bottom layer of the fuel tank, so that the liquid level rises and overflows, the overflowed oil with fire flows to the ground to form flowing fire, the flowing fire spreads to a low position along with the terrain, and the safety of fighters, vehicles and other devices is directly threatened.
The principle of the foam generator for spraying foam is as follows: the device consists of an outer cylinder, a foaming screen, a foam mixed liquid pipeline, a foam mixed liquid spray head and a rotatable impeller. The urceolus is the tube-shape, and the foaming screen cloth is fixed in the front end (foam injection end) of urceolus, and the impeller is arranged in the urceolus rear end, and foam mixed liquid shower nozzle arranges between foaming screen cloth and impeller. When the fire extinguishing device works, foam mixed liquid is pressurized by the liquid supply equipment and then is conveyed to the foam mixed liquid spray head through the foam mixed liquid pipeline, the spray head sprays the foam mixed liquid to the foaming screen mesh in a mist form, a layer of film is formed on the inner surface of the screen mesh, at the moment, the impeller rotates at a high speed under external force driving (water driving, electric driving or hydraulic driving) to generate air current to blow to the foaming screen mesh, the air current blows the foam mixed liquid into a large amount of bubbles under the action of the foaming screen mesh, high-expansion foam is formed, the surface of a burning object is submerged or covered, and the fire extinguishing purpose is achieved by utilizing the blocking of the foam, cooling and suffocation. The foam generator has the advantages of high expansion ratio, but has the defect of short range. The combustion of fuel oil generates strong heat radiation, and fire fighters and equipment cannot approach an ignition area, so that the existing foam generators cannot spray high-expansion foam to the surface of fuel to achieve the purpose of fire extinguishing.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a foam fire-fighting device capable of generating high-multiple foam and spraying at a long range and an application thereof so as to realize efficient and rapid fire extinguishing on oil fires.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a foam fire-fighting fire extinguishing device comprises an axial flow fan, an annular spraying body and an annular hollow foaming screen, wherein the annular spraying body comprises a hollow cylinder and a plurality of spraying nozzles arranged on the periphery of the inner wall of the hollow cylinder; the hollow cylinder is fixedly connected with the air outlet end of the axial flow fan, and the annular hollow foaming sieve net is embedded in the hollow cavity of the hollow cylinder and is spaced from the inner wall of the hollow cylinder; and the hollow cylinder, the annular hollow foaming screen and the air outlet of the axial flow fan are all positioned on the same central axis.
In one embodiment, a cavity is provided between the outer wall and the inner wall of the hollow cylinder, the cavity being in communication with both the foam mixture inlet and the spray nozzle.
Preferably, the diameter of the inner opening end of the hollow cavity of the hollow cylinder is smaller than that of the outer opening end.
One embodiment, annular cavity foaming screen cloth includes outer mouthful of support ring, interior mouthful of support ring and foaming screen cloth body, and the internal diameter of outer mouthful of support ring is greater than the internal diameter of interior mouthful of support ring, the foaming screen cloth body is fixed between outer mouthful of support ring and interior mouthful of support ring, forms the cavity annular body that the opening is the splayed.
In one embodiment, the outer opening support ring of the annular hollow foaming screen is fixedly connected with the hollow cylinder through the mounting seat.
Preferably, the distance between the annular hollow foaming screen and the inner wall of the hollow cylinder is 20-200 mm.
The foam fire-fighting device can be arranged on a fire truck, a fire-fighting robot or a lifting arm support to extinguish oil fire.
The working principle of the foam fire-fighting extinguishing device is as follows:
the foam mixed liquid is pressurized by the liquid supply equipment and then reaches the spray nozzle through the foam mixed liquid conveying pipe and a foam mixed liquid inlet on the annular spray body, the foam mixed liquid is sprayed onto the annular hollow foaming screen mesh in a mist form by the spray nozzle, and meanwhile, the axial flow fan rotates at a high speed to generate air flow, wherein part of the air flow blows to a gap between the annular hollow foaming screen mesh and the inner wall of the hollow cylinder and blows the foam mixed liquid to the foaming screen mesh body, so that the foam mixed liquid is blown into a large amount of bubbles to form high-expansion foam under the action of the foaming screen mesh body; because the air outlets of the hollow cylinder, the annular hollow foaming screen and the axial flow fan are all positioned on the same central axis, and the central part is of a hollow structure without other shielding, the high-speed airflow generated by the axial flow fan is almost not attenuated, so that the formed high-multiple foam can be blown to a farther place, the long-range submergence or the covering of the surface of a burning object is realized, and the purpose of quickly extinguishing the fire is achieved.
Compared with the prior art, the invention has the beneficial technical effects that:
the foam fire-fighting fire extinguishing device formed by the axial flow fan, the annular spraying body and the annular hollow foaming screen mesh can realize the generation of high-multiple foam and can also carry out long-range spraying, the defects of low foaming multiple of a foam gun (gun) and short range of a foam generator can be effectively solved, in addition, the foam mixed liquid is sprayed by the spraying nozzle, the high-multiple foaming is favorably generated, the flow of the required foam mixed liquid is small, the fire extinguishing requirement can be met by a small amount of foam mixed liquid, the problem that overflowed oil with fire flows to the ground to form flowing fire cannot be caused, and the foam fire extinguishing device can be arranged on a fire truck, a fire-fighting robot and an elevating arm support and used for efficiently and quickly extinguishing the oil fire.
Drawings
FIG. 1 is a schematic structural diagram of a foam fire-fighting device provided by the present invention;
FIG. 2 is a schematic structural diagram of an annular spray body provided by an embodiment;
FIG. 3 is a schematic structural diagram of an annular hollow foaming screen provided by an embodiment;
fig. 4 is an assembly view between the annular hollow foaming screen and the annular spray body provided in the example;
fig. 5 is a schematic view of the working principle of the foam fire extinguishing device of the invention.
The numbers in the figures are as follows: 1. an axial flow fan; 2. an annular spray body; 21. a hollow cylinder; 211. an inner wall of the hollow cylinder; 212. an outer wall of the hollow cylinder; 213. a hollow cavity of the hollow cylinder; 214. a cavity; 22. a spray nozzle; 23. a foam mixed liquid inlet; 3. an annular hollow foaming screen; 31. an outer port support ring; 32. an inner port support ring; 33. a foamed screen body; 4. a foam mixed liquid conveying pipe; 5. and (7) mounting a seat.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and examples.
Examples
Referring to fig. 1 to 4, the foam fire-fighting fire-extinguishing device provided by the invention comprises an axial flow fan 1, an annular spray body 2 and an annular hollow foaming screen 3, wherein the annular spray body 2 comprises a hollow cylinder 21 and a plurality of spray nozzles 22 arranged on the periphery of the inner wall 211 of the hollow cylinder, a foam mixed liquid inlet 23 is arranged on the outer wall 212 of the hollow cylinder, the inlet end of the foam mixed liquid inlet 23 is communicated with an external foam mixed liquid conveying pipe 4, and the outlet end of the foam mixed liquid inlet 23 is communicated with the spray nozzles 22; the hollow cylinder 21 is fixedly connected with the air outlet end of the axial flow fan 1, and the annular hollow foaming screen 3 is embedded in the hollow cavity 213 of the hollow cylinder 21 and has a distance d with the inner wall 211 of the hollow cylinder; and the hollow cylinder 21, the annular hollow foaming screen 3 and the air outlet of the axial flow fan 1 are all positioned on the same central axis.
In this embodiment:
a cavity 214 is provided between the outer wall 212 and the inner wall 211 of the hollow cylinder, said cavity 214 communicating with both the foam mixture inlet 23 and the spray nozzle 22.
The hollow cavity 213 of the hollow cylinder has an inner mouth end diameter smaller than an outer mouth end diameter.
Annular cavity foaming screen cloth 3 includes outer mouthful of support ring 31, interior mouthful of support ring 32 and foaming screen net body 33, and the internal diameter of outer mouthful of support ring 31 is greater than the internal diameter of interior mouthful of support ring 32, foaming screen net body 33 is fixed between outer mouthful of support ring 31 and interior mouthful of support ring 32, forms the cavity annular body that the opening is the splayed.
The outer opening support ring 31 of the annular hollow foaming screen 3 is fixedly connected with the hollow cylinder 21 through the mounting seat 5.
Preferably, the distance d between the annular hollow foaming screen 3 and the inner wall 211 of the hollow cylinder is 20-200 mm.
Referring to fig. 5, the working principle of the foam fire-fighting extinguishing device of the invention is as follows:
after being pressurized by a liquid supply device, the foam mixed liquid reaches the spray nozzle 22 through the foam mixed liquid conveying pipe 4 and the foam mixed liquid inlet 23 on the annular spray body 2, the foam mixed liquid is sprayed onto the annular hollow foaming screen 3 in a mist form by the spray nozzle 22, and meanwhile, the axial flow fan 1 rotates at a high speed to generate air flow, wherein a part of the air flow blows towards a gap between the annular hollow foaming screen 3 and the inner wall 211 of the hollow cylinder to the foaming screen body 33, so that the foam mixed liquid is blown into a large amount of bubbles under the action of the foaming screen body 33 to form high-expansion foam; in addition, because the hollow cylinder 21, the annular hollow foaming screen 3 and the air outlet of the axial flow fan 1 are all positioned on the same central axis, the central part is of a hollow structure without other shielding, and the axial flow fan 1 can rotate at a high speed, the high-speed air flow generated by the axial flow fan 1 is almost not attenuated, so that the formed high-multiple foam can be blown to a farther place, the surface of a burning object is submerged or covered at a long range, and the purpose of quickly extinguishing the fire is achieved.
In conclusion, the foam fire-fighting fire extinguishing device formed by the axial flow fan, the annular spraying body and the annular hollow foaming screen mesh can realize the generation of high-multiple foam and can also carry out long-range spraying, the defects of low foaming multiple of a foam gun (gun) and short range of a foam generator can be effectively overcome, in addition, the foam mixed liquid is sprayed by the spraying nozzle, the high-multiple foaming is favorably generated, the flow of the required foam mixed liquid is small, the fire extinguishing requirement can be met by a small amount of foam mixed liquid, the problem that overflowed oil with fire flows to the ground to form flowing fire cannot be caused, the foam fire extinguishing device has important value for the efficient and rapid fire extinguishing of oil fires, and the foam fire extinguishing device is remarkably improved compared with the prior art.
It is finally necessary to point out here: the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (4)
1. A foam fire-fighting extinguishing device is characterized in that: the device comprises an axial flow fan, an annular spraying body and an annular hollow foaming screen, wherein the annular spraying body comprises a hollow cylinder and a plurality of spraying nozzles arranged on the periphery of the inner wall of the hollow cylinder, the outer wall of the hollow cylinder is provided with a foam mixed liquid inlet, the inlet end of the foam mixed liquid inlet is communicated with an external foam mixed liquid conveying pipe, and the outlet end of the foam mixed liquid inlet is communicated with the spraying nozzles; the hollow cylinder is fixedly connected with the air outlet end of the axial flow fan, and the annular hollow foaming sieve net is embedded in the hollow cavity of the hollow cylinder and is spaced from the inner wall of the hollow cylinder; the hollow cylinder, the annular hollow foaming screen and the air outlet of the axial flow fan are all positioned on the same central axis, a cavity is arranged between the outer wall and the inner wall of the hollow cylinder, and the cavity is communicated with the foam mixed liquid inlet and the spray nozzle; the interior mouth end diameter of the well cavity of a cavity section of thick bamboo is less than outer mouth end diameter, annular cavity foaming screen cloth includes outer mouthful support ring, interior mouthful support ring and foaming screen cloth body, and the internal diameter of outer mouthful support ring is greater than the internal diameter of interior mouthful support ring, the foaming screen cloth body is fixed between outer mouthful support ring and interior mouthful support ring, forms the cavity annular body that the opening is the splayed.
2. A foam fire fighting unit as defined in claim 1, wherein: the outer opening support ring of the annular hollow foaming screen is fixedly connected with the hollow cylinder through the mounting seat.
3. A foam fire fighting unit as defined in claim 1, wherein: the distance between the annular hollow foaming screen and the inner wall of the hollow cylinder is 20-200 mm.
4. Use of a foam fire fighting unit according to any of claims 1 to 3, characterized in that: the foam fire-fighting device is arranged on a fire truck, a fire-fighting robot or a lifting arm support to extinguish oil fire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252210.5A CN106492377B (en) | 2016-12-30 | 2016-12-30 | Foam fire-fighting extinguishing device and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611252210.5A CN106492377B (en) | 2016-12-30 | 2016-12-30 | Foam fire-fighting extinguishing device and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106492377A CN106492377A (en) | 2017-03-15 |
| CN106492377B true CN106492377B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611252210.5A Active CN106492377B (en) | 2016-12-30 | 2016-12-30 | Foam fire-fighting extinguishing device and application thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112402845A (en) * | 2020-11-25 | 2021-02-26 | 江苏徐工工程机械研究院有限公司 | Fire engine foam mixes reinforcing apparatus and fire engine |
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| CN106492377A (en) | 2017-03-15 |
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