CN115671619A - Foam generating device and fire fighting equipment - Google Patents
Foam generating device and fire fighting equipment Download PDFInfo
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- CN115671619A CN115671619A CN202211191888.2A CN202211191888A CN115671619A CN 115671619 A CN115671619 A CN 115671619A CN 202211191888 A CN202211191888 A CN 202211191888A CN 115671619 A CN115671619 A CN 115671619A
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Abstract
The invention relates to a foam generating device and a fire fighting apparatus, the foam generating device comprising: a first tubular member (10) for the passage of a liquid to be frothed; the second tubular part (7) is sleeved outside the first tubular part (10) and forms an annular cavity (9) with the first tubular part (10); an inlet pipe (3) connected to the second tubular member (7) and communicating with the annular chamber (9); and the through holes (6) are arranged on the first tubular component (10) to communicate the annular cavity (9) with the inner cavity of the first tubular component (10), the through holes (6) are inclined towards the inlet end of the first tubular component (10) along the direction close to the inner cavity of the first tubular component (10) relative to the radial direction of the first tubular component (10), and air exhausted from the through holes (6) into the first tubular component (10) can form an impact action with foaming liquid introduced from the inlet end of the first tubular component (10), so that the foam generated by the foam generating device is dense and has good stability.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a foam generating device and fire fighting equipment.
Background
Liquid fires such as petroleum and petrochemical fires, national power grid extra-high voltage converter transformer fires and the like are consistent in the problems of flammability, explosiveness, fast combustion, fierce fire, easy recombustion, difficulty in fighting and the like. The traditional fire engine uses B-type foaming agent to produce foam and extinguish fire in the form of negative pressure air suction at the outlet of a fire monitor, but the foam production mode has the disadvantages that:
(1) The negative pressure air suction amount is inaccurate, so that the bubble production quality is continuously changed and unstable;
(2) The size difference of the generated foam is large, the liquid separation time is short, the stability is poor, and the fire extinguishing effect is greatly reduced.
Disclosure of Invention
The invention aims to provide a foam generating device which generates compact foam and has good stability and fire fighting equipment.
According to an aspect of an embodiment of the present invention, there is provided a foam generating apparatus including:
a first tubular member for circulating a liquid to be foamed;
the second tubular component is sleeved outside the first tubular component, and an annular cavity is formed between the second tubular component and the first tubular component;
the air inlet pipe is connected with the second tubular component and communicated with the annular cavity; and
and a through hole provided in the first tubular member to communicate the annular chamber with the inner cavity of the first tubular member, the through hole being inclined with respect to a radial direction of the first tubular member toward the inlet end of the first tubular member in a direction close to the inner cavity of the first tubular member.
In some embodiments, the foam generating apparatus further comprises a mixing unit disposed in the lumen of the first tubular member.
In some embodiments, the mixing unit is removably disposed within the first tubular member.
In some embodiments, the foam generating device includes a plurality of air inlet pipes connected to the second tubular member and communicating with the annular chamber, respectively, the plurality of air inlet pipes being disposed along a circumferential direction of the first tubular member and along an axial direction of the first tubular member.
In some embodiments, the air inlet pipe extends into the annular cavity, a port of one end of the air inlet pipe, which is located in the annular cavity, is closed, and an air outlet is formed in the circumferential surface of one section of the air inlet pipe, which is located in the annular cavity.
In some embodiments, the plurality of exhaust ports are arranged along a circumferential direction of the intake pipe.
In some embodiments of the present invention, the,
the second tubular member is detachably connected with the first tubular member; and/or
The air inlet tube is detachably connected to the second tubular member.
In some embodiments, the foam-generating device further comprises an annular member disposed over the first tubular member, the annular member connecting the first tubular member and the second tubular member to enclose the annular cavity.
In some embodiments of the present invention, the,
the annular component is connected with the first tubular component through welding glue; and/or
The annular member is connected to the second tubular member by a weld glue.
In some embodiments, the bottom of the second tubular member is provided with a drain port in communication with the annular chamber, the drain port having a control valve connected thereto.
In some embodiments, the foam generating device is a class a foam fire suppressant foam generating device or a class B foam fire suppressant foam generating device.
According to another aspect of the invention, a fire fighting device is also provided, which comprises the foam generating device.
By applying the technical scheme, the air discharged from the through hole into the first tubular part can form an impact action with the foaming liquid introduced from the inlet end of the first tubular part, so that the foam generating device can generate dense foam and has good stability.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view showing a structure of a foam generating apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a foam generating device according to an embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of an air inlet pipe of a foam generating apparatus according to an embodiment of the present invention; and
fig. 4 shows a schematic structural view of the annular member of the foam generating apparatus of the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in connection with fig. 1 and 2, the foam generating apparatus of the present embodiment includes a first tubular member 10, a second tubular member 7, an air inlet pipe 3, and a through hole 6. The first tubular member 10 is used for circulating a liquid to be foamed. The second tubular part 7 is fitted over the first tubular part 10 and forms an annular cavity 9 with the first tubular part 10. The air inlet tube 3 is connected to the second tubular part 7 and communicates with the annular chamber 9. A through hole 6 provided in the first tubular member 10 to communicate the annular chamber 9 with the inner chamber of the first tubular member 10, the through hole 6 being inclined with respect to the radial direction of the first tubular member 10 in a direction close to the inner chamber of the first tubular member 10 toward the inlet end of the first tubular member 10.
The annular cavity 9 and the inclined through hole 6 are designed to be opposite to the main flow direction of the foaming agent aqueous solution and form an acute angle, so that impact and contact foam production are facilitated, and the inclined angle of the through hole 6 needs to be comprehensively determined through simulation and test according to specific working conditions.
The foam generating device of the present example is a class a foam fire extinguishing agent foam generating device or a class B foam fire extinguishing agent foam generating device. Wherein, the A-type foam extinguishing agent is used for extinguishing solid fire, and the B-type foam extinguishing agent is used for extinguishing liquid fire.
When a solid fire is put out, the foam can adhere to the surface of a combustion object to form a heat-insulation radiation-protection protective layer, stable and durable foam can not flow randomly, water damage is reduced, and as viscous liquid with strong seepage capability is separated out by continuous foam, the viscous liquid can penetrate deep into the flame of the solid combustion object, the carbonization of the surface of the combustion object is promoted, a combustion chain is cut off, and the combustion reaction is stopped.
When a liquid fire is put out, stable and durable foam and stable water evolution exist, the foam is quickly spread under the action of a water film, the stable and durable foam and the stable and durable water evolution can quickly extinguish fire and effectively prevent the reburning of comburent.
In this embodiment, the air discharged from the through holes 6 into the first tubular member 10 can impact the foaming liquid introduced from the inlet end of the first tubular member 10, so that the foam generating device can generate a dense foam with good stability. Furthermore, the problem that the B-type foam extinguishing agent has no special foam generating device and is poor in foaming quality can be solved.
In order to ensure that the air is fully contacted with the liquid to be foamed, the inclined through holes 6 are uniformly distributed on the first tubular part 10, and the inner diameter D and the number N of the through holes 6 satisfy the formula
And finally determining the optimal aperture and the optimal number of holes through simulation and test after the model is drawn.
The foam-generating device further comprises a mixing unit 4 arranged in the inner cavity of the first tubular member 10. The mixing unit 4 includes but is not limited to static mixing units such as SK/SV, baffle structures, mesh structures, jet structures, etc.
The mixing unit 4 is detachably arranged inside the first tubular member 10. The mixing unit 4 is designed to be a detachable structure, and can realize cleaning and maintenance functions for the mixing unit which is similar to an SV static mixing unit and a net type structure and has better bubble production effect but the blockage risk.
The foam generating device comprises a plurality of air inlet pipes 3, the air inlet pipes 3 are respectively connected with the second tubular component 7 and communicated with the annular cavity 9, and the air inlet pipes 3 are arranged along the circumferential direction of the first tubular component 10 and are arranged along the axial direction of the first tubular component 10. As shown in fig. 1 and 2 in combination, two air inlet pipes 3 adjacent to each other in the circumferential direction of the second tubular member 7 are arranged at intervals in the axial direction of the second tubular member 7, and two air inlet pipes 3 adjacent to each other in the axial direction of the second tubular member 7 are arranged at intervals in the circumferential direction of the second tubular member 7, so that the plurality of air inlet pipes 3 are uniformly arranged on the annular chamber 9, and the air output from the plurality of through holes 6 is made uniform as much as possible.
As shown in fig. 3, the air inlet pipe 3 extends into the annular cavity 9, a port of one end of the air inlet pipe 3 located in the annular cavity 9 is closed, and an air outlet 31 is arranged on a circumferential surface of a section of the air inlet pipe 3 located in the annular cavity 9. The portion of the inlet pipe 3 inserted into the annular chamber 9 is designed to be axially blocked and to deliver air uniformly perpendicular to the axially open exhaust port 31.
In some embodiments, the plurality of exhaust ports 31 are arranged along the circumferential direction of the intake pipe 3.
Considering that the foam generating device has more open pores, the fire-fighting water has more impurities and the foaming agent has certain corrosiveness, in order to prevent the inclined through hole 6 on the first tubular component 10 with the holes and the exhaust port 31 on the air inlet pipe 3 from being blocked, the second tubular component 7 is detachably connected with the first tubular component 10, and the air inlet pipe 3 is detachably connected with the second tubular component 7, so that the inclined through hole 6 on the first tubular component 10 and the exhaust port on the air inlet pipe 3 can be cleaned in time.
As shown in fig. 1 and 4, the foam generating device further comprises an annular member 2 fitted over the first tubular member 10, the annular member 2 connecting the first tubular member 10 and the second tubular member 7 to close the annular chamber 9.
The annular member 2 is connected to the first tubular member 10 by means of a welding glue; the annular member 2 is connected to the second tubular member 7 by means of a weld glue. All link through the welding glue between second tubular component 7 and annular part 2 and the intake pipe 3, can remove the restraint between the connecting piece through the debonding agent after meetting the foaming effect variation, inspect and clear up the gas vent 31 plug on the even distribution slant through-hole 6 intake pipe 3 on the first tubular component 10 and restore.
In order to facilitate maintenance and prevent residual liquid from freezing to damage the structure of the gas-liquid mixing device in winter, a liquid outlet communicated with the annular cavity 9 is formed in the bottom of the second tubular component 7 so as to blow away residual water by utilizing compressed air, a one-way valve is arranged on the air supply pipeline to prevent liquid from flowing backwards, and a control valve 8 is connected to the liquid outlet formed in the bottom of the second tubular component 7. The control valve comprises an electric ball valve. The air supply line is connected to the air inlet pipe 3.
The working principle of the foam generating device is as follows:
utilize the fire engine from taking malleation or negative pressure foamant interpolation device to let in the fire pump with foamant and water together, rely on the blade to accomplish the intensive mixing of foamant and water, the foamant aqueous solution that forms lets in the foam generating device through foamant aqueous solution inlet flange 1, compressed air lets in the annular chamber 9 through three intake pipe 3 of axial and radial equipartition, and then let in the foam generating device through slant through-hole 6 on the foraminiferous first tubular part 10, the reverse striking of gas-liquid two-phase flow realizes first foaming, strike and the stirring secondary foaming through mixing unit 4 in the foam generating device form compact foam and flow from foam outlet flange 5. In order to facilitate maintenance and prevent residual liquid from freezing to damage the structure of the gas-liquid mixing device in winter, a hole is formed in the bottom of the second tubular part 7 and is connected with a control valve 8, residual water is blown away by compressed air, and a one-way valve is arranged on the air supply pipeline to prevent liquid from flowing backwards. Considering that the fire-fighting water contains more impurities and the foaming agent has certain corrosivity, when the foaming effect is poor, the restriction between the connecting pieces can be removed through the gel remover, and the plugs of the inclined through holes 6 uniformly distributed on the first tubular part 10 and the exhaust holes 31 on the air inlet pipe 3 are checked and cleaned.
The technical effects of the foam generating device of the embodiment are as follows:
(1) Aiming at the rare condition of A-type and B-type foam extinguishing agent foam generating devices in the foam fire engine in the current industry, a new foam generating device structure is provided for reference;
(2) The device can realize primary foaming by reverse impact of the gas-phase inlet and the liquid-phase inlet, can realize secondary foaming by turbulent flow of the mixed unit structure, has compact generated foam and good stability, and solves the problems that the B-type foam extinguishing agent has no special foam generating device and has poor foaming quality;
(3) The same structure can be changed into different foam generating devices by replacing the mixing unit, so that the cost is greatly reduced, and the universality is strong;
(4) The detachable structural design, the installation, the maintenance and the repair are all very convenient.
According to another aspect of the invention, a fire fighting device is also provided, which comprises the foam generating device.
The present invention is not limited to the above exemplary embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A foam generating device, comprising:
a first tubular member (10) for the passage of a liquid to be frothed;
the second tubular part (7) is sleeved outside the first tubular part (10) and forms an annular cavity (9) with the first tubular part (10);
an inlet pipe (3) connected to the second tubular member (7) and communicating with the annular chamber (9); and
-a through hole (6) provided on said first tubular member (10) to communicate said annular chamber (9) with the internal cavity of said first tubular member (10), said through hole (6) being inclined with respect to the radial direction of said first tubular member (10) towards the inlet end of said first tubular member (10) in a direction close to the internal cavity of said first tubular member (10).
2. Foam-generating device according to claim 1, characterized in that it further comprises a mixing unit (4) provided in the inner cavity of said first tubular element (10).
3. Foam-generating device according to claim 2, characterized in that the mixing unit (4) is removably arranged inside the first tubular part (10).
4. A foam-generating device according to claim 1, characterized in that it comprises a plurality of said air inlet pipes (3), a plurality of said air inlet pipes (3) being connected to said second tubular member (7) and communicating with said annular chamber (9), respectively, a plurality of said air inlet pipes (3) being arranged along the circumferential direction of said first tubular member (10) and along the axial direction of said first tubular member (10).
5. The foam generating device as recited in claim 1, characterized in that the air inlet pipe (3) extends into the annular cavity (9), the port of the air inlet pipe (3) at one end in the annular cavity (9) is closed, and the peripheral surface of the section of the air inlet pipe (3) in the annular cavity (9) is provided with an air outlet (31).
6. The foam generating apparatus as recited in claim 5, wherein a plurality of the exhaust ports (31) are arranged along a circumferential direction of the intake pipe (3).
7. Foam generating device according to claim 1,
the second tubular member (7) being removably connected to the first tubular member (10); and/or
The air inlet pipe (3) is detachably connected with the second tubular part (7).
8. A foam-generating device as defined in claim 7, characterized in that it further comprises an annular member (2) fitted over said first tubular member (10), said annular member (2) connecting said first tubular member (10) and said second tubular member (7) to close said annular chamber (9).
9. Foam generating device according to claim 8,
the annular part (2) is connected with the first tubular part (10) through welding glue; and/or
The annular part (2) is connected to the second tubular part (7) by means of a weld glue.
10. Foam-generating device according to claim 1, characterized in that the bottom of said second tubular element (7) is provided with a drain connected to said annular chamber (9), said drain being connected to a control valve (8).
11. The foam generating device as claimed in claim 1, wherein the foam generating device is a class a foam fire suppressant foam generating device or a class B foam fire suppressant foam generating device.
12. A fire fighting apparatus, characterized in that it comprises a foam-generating device according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211191888.2A CN115671619B (en) | 2022-09-28 | 2022-09-28 | Foam generating device and fire fighting equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211191888.2A CN115671619B (en) | 2022-09-28 | 2022-09-28 | Foam generating device and fire fighting equipment |
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| CN115671619A true CN115671619A (en) | 2023-02-03 |
| CN115671619B CN115671619B (en) | 2023-08-04 |
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| CN214912871U (en) * | 2021-02-01 | 2021-11-30 | 日照阳光电力设计有限公司 | Fire control gas-liquid mixing device |
| CN215233380U (en) * | 2021-08-03 | 2021-12-21 | 山西铭石煤层气利用股份有限公司 | Low-concentration gas mixing device based on Venturi jet flow |
| CN215610631U (en) * | 2021-09-17 | 2022-01-25 | 何锦昊 | Foam generator for mine fire extinguishing |
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2022
- 2022-09-28 CN CN202211191888.2A patent/CN115671619B/en active Active
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| GB391070A (en) * | 1932-12-01 | 1933-04-20 | Samuel Martyn Martin | Improved apparatus for making foam |
| FR1057879A (en) * | 1951-02-06 | 1954-03-11 | Nat Foam Syst | Foam fire extinguisher |
| CN104759050A (en) * | 2015-03-19 | 2015-07-08 | 中国石油化工股份有限公司 | Bulk-flow built-in non-premixed compressed air foam extinguishing apparatus |
| WO2017016142A1 (en) * | 2015-07-29 | 2017-02-02 | 成都自能消防设备有限公司 | Air foam firefighting gun |
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| US20200329923A1 (en) * | 2018-01-09 | 2020-10-22 | Rieke Corporation | Reduced force, sealing vent for squeeze foamer |
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| CN215610631U (en) * | 2021-09-17 | 2022-01-25 | 何锦昊 | Foam generator for mine fire extinguishing |
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