CN115671619B - Foam generating device and fire fighting equipment - Google Patents
Foam generating device and fire fighting equipment Download PDFInfo
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- CN115671619B CN115671619B CN202211191888.2A CN202211191888A CN115671619B CN 115671619 B CN115671619 B CN 115671619B CN 202211191888 A CN202211191888 A CN 202211191888A CN 115671619 B CN115671619 B CN 115671619B
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Abstract
The invention relates to a foam generating device and fire-fighting equipment, the foam generating device includes: a first tubular member (10) for circulating a liquid to be foamed; 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 air inlet pipe (3) connected with the second tubular part (7) and communicated with the annular cavity (9); the through hole (6) is arranged on the first tubular part (10) so as to be communicated with the annular cavity (9) and the inner cavity of the first tubular part (10), the through hole (6) is inclined towards the inlet end of the first tubular part (10) along the direction close to the inner cavity of the first tubular part (10) relative to the radial direction of the first tubular part (10), and the air discharged from the through hole (6) into the first tubular part (10) can form an impact effect with foaming liquid introduced from the inlet end of the first tubular part (10), so that the foam generated by the foam generating device is compact and has good stability.
Description
Technical Field
The invention relates to the technical field of fire protection, in particular to a foam generating device and fire protection equipment.
Background
Liquid fires such as petroleum and petrochemical fires, and national power grid extra-high voltage converter transformer fires, which are consistent in problems of inflammability, explosiveness, quick combustion, strong fire, easy re-combustion, difficult suppression and the like. Traditional fire engine uses B class foamer to inhale the form bubble of air at fire gun export negative pressure to put out a fire, but this kind of drawback of producing the bubble mode lies in:
(1) The negative pressure draws the air quantity inaccurately, causes the bubble quality to change constantly, unstable;
(2) The produced foam has large size difference, short liquid separation time, poor stability and great discount on fire extinguishing effect.
Disclosure of Invention
The invention aims to provide a foam generating device and fire-fighting equipment which are compact in foam generation and good in stability.
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 part is sleeved outside the first tubular part, and an annular cavity is formed between the second tubular part and the first tubular part;
the air inlet pipe is connected with the second tubular part and communicated with the annular cavity; and
and a through hole provided on the first tubular member so as to communicate the annular chamber and the inner chamber of the first tubular member, the through hole being inclined toward the inlet end of the first tubular member in a direction approaching the inner chamber of the first tubular member with respect to a radial direction of the first tubular member.
In some embodiments, the foam generating device 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 comprises 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 circumferentially of the first tubular member and axially 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 located in the annular cavity is closed, and an air outlet is formed in the peripheral surface of one section of the air inlet pipe 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, in some embodiments,
the second tubular member is detachably connected with the first tubular member; and/or
The air inlet pipe is detachably connected with the second tubular member.
In some embodiments, the foam generating device further comprises an annular member that fits over the first tubular member, the annular member connecting the first tubular member and the second tubular member to enclose the annular chamber.
In some embodiments of the present invention, in some embodiments,
the annular part is connected with the first tubular part through welding glue; and/or
The annular part is connected with the second tubular part through welding glue.
In some embodiments, a drain port is provided at the bottom of the second tubular member in communication with the annular chamber, and a control valve is connected to the drain port.
In some embodiments, the foam generating device is a class a foam extinguishing agent foam generating device or a class B foam extinguishing agent foam generating device.
According to another aspect of the present invention, there is also provided a fire fighting apparatus including the foam generating device described above.
By means of the technical scheme, the air discharged from the through hole into the first tubular component can form an impact effect with foaming liquid introduced from the inlet end of the first tubular component, so that the foam generating device can generate compact foam and is good in stability.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 shows a schematic structural view of a foam generating apparatus according to an embodiment of the present invention;
FIG. 2 shows a schematic side view of a foam generating apparatus 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 an annular member of a foam generating apparatus according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 intake pipe 3, and a through hole 6. The first tubular member 10 is for circulating a liquid to be foamed. The second tubular member 7 is sleeved outside the first tubular member 10 and forms an annular cavity 9 with the first tubular member 10. The air inlet pipe 3 is connected to the second tubular member 7 and communicates with the annular chamber 9. A through hole 6 provided on the first tubular member 10 to communicate the annular chamber 9 and the inner cavity of the first tubular member 10, the through hole 6 being inclined toward the inlet end of the first tubular member 10 in a direction approaching the inner cavity of the first tubular member 10 with respect to the radial direction of the first tubular member 10.
The annular cavity 9 and the inclined through holes 6 are designed to be in an acute angle form opposite to the main flow direction of the aqueous solution of the foaming agent, so that the impact and contact foaming are facilitated, and the inclination angle of the through holes 6 is comprehensively determined through simulation and test according to specific working conditions.
The foam generating device of the embodiment is a class a foam extinguishing agent foam generating device or a class B foam 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 the solid fire disaster is extinguished, the foam can be adhered to the surface of a combustion object to form a layer of heat-insulating radiation-proof protective layer, stable and durable foam can not flow at will, water stain loss is reduced, and as the continuous foam is separated out of viscous liquid with strong permeability, the viscous liquid can permeate into the deep of the negative 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 the liquid fire is extinguished, stable and durable foam and stable water are provided, the foam is rapidly spread under the action of a water film, the stable and durable foam and the stable and durable water are provided, the fire can be rapidly extinguished, and the re-burning of the combustion matters is effectively prevented.
In the present embodiment, the air discharged from the through-hole 6 into the first tubular member 10 can form an impact action with the foaming liquid introduced from the inlet end of the first tubular member 10, so that the foam generating device can generate a dense and stable foam. Further, the problems that the B-type foam extinguishing agent has no special foam generating device and the foaming quality is poor can be solved.
In order to ensure that the air is in sufficient contact with the liquid to be frothed, it is considered that the first tubular member 10 is provided with inclined through holes 6, the inner diameter D and the number N of the through holes 6 satisfy the formulaAnd finally determining the optimal pore diameter and the pore number through simulation and test after drawing a model.
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, a static mixing unit such as SK/SV, a baffle structure, a net structure, a jet structure, and the like.
The mixing unit 4 is detachably arranged in the first tubular member 10. The mixing unit 4 is designed to be of a detachable structure, and the cleaning and maintenance functions can be realized for the mixing unit which has good foam generating effect and risk of blockage like an SV static mixing unit and a net structure.
The foam generating device includes a plurality of air intake pipes 3, the plurality of air intake pipes 3 are respectively connected with the second tubular member 7 and communicate with the annular chamber 9, and the plurality of air intake pipes 3 are disposed along the circumferential direction of the first tubular member 10 and along the axial direction of the first tubular member 10. As shown in fig. 1 and 2 in combination, two air intake pipes 3 adjacent 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 intake pipes 3 adjacent 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 intake pipes 3 are uniformly arranged on the annular chamber 9, so that the air output from the plurality of through holes 6 is as uniform as possible.
As shown in fig. 3, the intake pipe 3 extends into the annular chamber 9, a port of one end of the intake pipe 3 located in the annular chamber 9 is closed, and an exhaust port 31 is provided on the peripheral surface of one section of the intake pipe 3 located in the annular chamber 9. The part of the air inlet pipe 3 inserted into the annular cavity 9 is designed to be blocked axially and is uniformly supplied with air in a form of being perpendicular to the axial air outlet 31.
In some embodiments, the plurality of exhaust ports 31 are arranged in the circumferential direction of the intake pipe 3.
Considering that the foam generating device has more open pores, and the fire water has more impurities and the foaming agent has certain corrosiveness, in order to prevent the inclined through holes 6 on the first tubular part 10 with holes and the exhaust ports 31 on the air inlet pipe 3 from being blocked, the second tubular part 7 is detachably connected with the first tubular part 10, and the air inlet pipe 3 is detachably connected with the second tubular part 7, so that the inclined through holes 6 on the first tubular part 10 and the exhaust ports 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 which is 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 part 2 is connected with the first tubular part 10 by welding glue; the annular member 2 is connected to the second tubular member 7 by means of a welding glue. The second tubular part 7, the annular part 2 and the air inlet pipe 3 are all connected through welding glue, after the foaming effect is deteriorated, the constraint among the connecting pieces can be relieved through a glue releasing agent, and the plugs of the exhaust ports 31 on the air inlet pipe 3 with the inclined through holes 6 uniformly distributed on the first tubular part 10 are checked and cleaned for repairing.
In order to facilitate maintenance and prevent the damage to the structure of the gas-liquid mixing device caused by the icing of the residual liquid in winter, a liquid outlet communicated with the annular cavity 9 is formed in the bottom of the second tubular part 7 so as to blow off the residual water by using compressed air, a one-way valve is arranged on the air supply pipeline to prevent the liquid from flowing backwards, a liquid outlet is formed in the bottom of the second tubular part 7, and a control valve 8 is connected to the liquid outlet. The control valve comprises an electrically operated ball valve. The air supply pipeline is connected with an air inlet pipe 3.
The working principle of the foam generating device is as follows:
the fire engine is utilized to introduce the foaming agent and water into the fire pump together by the positive pressure or negative pressure foaming agent adding device, the full mixing of the foaming agent and the water is completed by virtue of the blades, the formed foaming agent aqueous solution is introduced into the foam generating device through the foaming agent aqueous solution inlet flange 1, compressed air is introduced into the annular cavity 9 through the three air inlet pipes 3 uniformly distributed axially and radially, and then is introduced into the foam generating device through the inclined through holes 6 on the first tubular part 10 with holes, the primary foaming is realized by the gas-liquid two-phase flow reverse impact, and dense foam is formed by the impact and stirring secondary foaming of the mixing unit 4 in the foam generating device and flows out of the foam outlet connecting flange 5. In order to facilitate maintenance and prevent damage to the structure of the gas-liquid mixing device caused by the icing of the residual liquid in winter, a control valve 8 is connected to the bottom opening of the second tubular part 7, the 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. In view of the fact that the fire water contains more impurities and the foaming agent has certain corrosiveness, after the foaming effect is poor, the constraint among the connecting pieces can be relieved through the dispergator, and 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 can be checked and cleaned.
The technical effects of the foam generating apparatus of this embodiment are as follows:
(1) Aiming at the situation that the foam generating devices of class A and class B foam extinguishing agents in the foam fire-fighting truck in the industry are all fresh at present, a novel structure of the foam generating device is provided for reference;
(2) The device has the advantages that the gas phase inlet and the liquid phase inlet of the device are impacted reversely, the primary foaming can be realized, the turbulent flow effect of the mixed unit structure can realize the secondary foaming, the produced foam is compact and has good stability, and the problems that the B-type foam extinguishing agent has no special foam generating device and the foaming quality is poor are solved;
(3) The same structure can be changed into different foam generating devices by changing the mixing units, so that the cost is greatly reduced, and the universality is strong;
(4) The detachable structural design is convenient to install, maintain and repair.
According to another aspect of the present invention, there is also provided a fire fighting apparatus including the above foam generating device.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather, any modification, equivalent replacement, improvement or the like which comes within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A foam generating device, comprising:
a first tubular member (10) for circulating a liquid to be foamed;
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 air inlet pipe (3) connected to the second tubular member (7) and communicating with the annular chamber (9); and
a through hole (6) provided on the first tubular member (10) so as to communicate the annular chamber (9) and the inner cavity of the first tubular member (10), the through hole (6) being inclined toward the inlet end of the first tubular member (10) in a direction approaching the inner cavity of the first tubular member (10) with respect to the radial direction of the first tubular member (10),
the foam generating device comprises a plurality of air inlet pipes (3), the plurality of air inlet pipes (3) are respectively connected with the second tubular part (7) and communicated with the annular cavity (9), the plurality of air inlet pipes (3) are arranged along the circumferential direction of the first tubular part (10) and along the axial direction of the first tubular part (10),
two of the air intake pipes (3) adjacent 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 of the air intake pipes (3) adjacent in the axial direction of the second tubular member (7) are arranged at intervals in the circumferential direction of the second tubular member (7),
the air inlet pipe (3) extends into the annular cavity (9), a port of one end of the air inlet pipe (3) positioned in the annular cavity (9) is closed, an air outlet (31) is arranged on the peripheral surface of one section of the air inlet pipe (3) positioned in the annular cavity (9),
a plurality of the exhaust ports (31) are arranged in the circumferential direction of the intake pipe (3).
2. Foam generating device according to claim 1, further comprising a mixing unit (4) provided in the inner cavity of the first tubular member (10).
3. Foam generating device according to claim 2, characterized in that the mixing unit (4) is detachably arranged in the first tubular part (10).
4. The foam generating apparatus of claim 1, wherein the foam generating apparatus comprises a foam generator,
-said second tubular member (7) being detachably connected to said first tubular member (10); and/or
The air inlet pipe (3) is detachably connected with the second tubular part (7).
5. Foam generating device according to claim 4, further comprising 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).
6. The foam generating apparatus of claim 5, wherein the foam generating apparatus comprises,
the annular part (2) is connected with the first tubular part (10) through welding glue; and/or
The annular part (2) is connected with the second tubular part (7) through welding glue.
7. Foam generating device according to claim 1, characterized in that the bottom of the second tubular part (7) is provided with a drain communicating with the annular chamber (9), to which drain a control valve (8) is connected.
8. The foam generating device of claim 1, wherein the foam generating device is a class a foam extinguishing agent foam generating device or a class B foam extinguishing agent foam generating device.
9. A fire protection apparatus comprising the foam generating device of any one of claims 1 to 8.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
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| CN115671619A CN115671619A (en) | 2023-02-03 |
| CN115671619B true CN115671619B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211191888.2A Active CN115671619B (en) | 2022-09-28 | 2022-09-28 | Foam generating device and fire fighting equipment |
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| CN (1) | CN115671619B (en) |
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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 |
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| 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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| EP3737272A4 (en) * | 2018-01-09 | 2021-09-29 | Rieke LLC | Reduced force, sealing vent for squeeze foamer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN207102372U (en) * | 2017-04-12 | 2018-03-16 | 中国石油化工股份有限公司 | A kind of foam maker jet pipe and the foam maker using the jet pipe |
| CN207221153U (en) * | 2017-09-12 | 2018-04-13 | 武汉迪克坦科技有限公司 | A kind of portable premixing compressed air foam fire-extinguishing apparatus |
| CN209752023U (en) * | 2019-03-26 | 2019-12-10 | 北京中卓时代消防装备科技有限公司 | Electric fire-fighting double-hose reel |
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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 |
| CN112972946A (en) * | 2021-03-04 | 2021-06-18 | 湖北江南专用特种汽车有限公司 | Compressed air foam generating device and control method thereof |
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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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| Publication number | Publication date |
|---|---|
| CN115671619A (en) | 2023-02-03 |
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