CN103454387B - Cup type combustor for foam extinguishing agent experiment - Google Patents
Cup type combustor for foam extinguishing agent experiment Download PDFInfo
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- CN103454387B CN103454387B CN201310438549.4A CN201310438549A CN103454387B CN 103454387 B CN103454387 B CN 103454387B CN 201310438549 A CN201310438549 A CN 201310438549A CN 103454387 B CN103454387 B CN 103454387B
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Abstract
The invention discloses a cup type combustor for a foam extinguishing agent experiment. The cup type combustor is characterized in that a bottom fuel outlet formed in a liquid fuel tank is communicated with a combustion cup through a flow regulating unit, a combustion cup hood is vertically arranged on a cabin opening on the left side of the upper surface of a foam cabin, the combustion cup is located at the center of the combustion cup hood, a top-sealed transparent hood is vertically arranged on a cabin opening on the right side of the upper surface of the foam cabin, a gas inlet is formed in the top of the top-sealed transparent hood, a gas rectifying net is arranged in the waist portion of the top-sealed transparent hood, a foam generating screen is packaged between a bottom sleeve pipe of the top-sealed transparent hood and the foam cabin, a foam liquid sprayer located above the foam generating screen faces towards the foam generating screen and is located below the gas rectifying net, and a foam liquid guide pipe connected with the foam liquid sprayer penetrates through the top-sealed transparent hood from the side wall of the top-sealed transparent hood. The cup type combustor can be used for researching the fire extinguishing performance and the fire extinguishing microcosmic mechanism of foam extinguishing agents, parameters can be easily controlled, and repeatability is good.
Description
Technical field
The present invention relates to a kind of measurement mechanism of fire foam extinguishing ability.
Background technology
The low speed coaxial flow invented by Hirst and Booth is the earliest got angry, and flame device---cup burner is widely used in the various measurement of gas extinguishing agent extinguishing concentration and the research of extinguishing mechanism at scientific research field.
In cup burner, fuel and oxygenant are distributed in the both sides of flame front, coaxially flow.And fire extinguishing agent enters flame combustion district mainly through the rolling action of oxygenant, because the fuel equivalence ratio of control combustion is much smaller than 1, therefore flame can obtain sufficient oxygen, reduces the impact of flowing on flame.Compared with the flame combustion of reality, the flame in cup burner is more stable, and the foamite amount required for knock down the flame is bigger than normal, and measurement result has the larger margin of safety.The method of current cup burner measurement gas fire extinguishing agent extinguishing concentration is adopted by the international important mechanism such as ISO (International Standards Organization) (ISO), National Fire Protection Association (NFPA) (NFPA), becomes the universal standard of measurement gas extinguishing concentration.
Fire foam puts out category-B fire, the desirable fire extinguishing agent of especially various fuel oil fire.Sum up known according to a large amount of Germicidal efficacy, fire extinction by foam is mainly interacted by foam and flame, while absorbing and cooling temperature, produce water vapor dilution oxygen, and froth bed also plays the effect stopping heat radiation and oxygen supply simultaneously.According to national standard " GB15308-2006 fire foam " known present stage, extinguishing property for fire foam detects the experimental provision mainly adopting large scale, and the 90% control fire time, 99% being used for measuring fire foam controls the parameter of the macroscopic views such as fire time, attack time, 25% fire resistanttime.Because the proving installation size used is larger, difficult parameters is accurately to control, and the impact of environmental factor on experiment is larger, cause the repeatability of experiment bad, it is higher that meanwhile this large-sized experiment detects danger, and bear primarily of Fire Research Station, test is not very convenient.For now, the extinguishing property proving installation of the good fire foam of result of use is not also had both at home and abroad.
Summary of the invention
The present invention is the weak point for avoiding existing for above-mentioned prior art, a kind of fire foam experiment cup burner is provided, the extinguishing property of various fire foam is tested as experimental provision, overcome the deficiency that the test of existing fire foam extinguishing property is inconvenient, it have that size is little, structure simple, favorable repeatability, parameter are easy to control simultaneously, easy to operate, survey data and can be applied to the advantages such as the design of large-sized fire extinguishing system.
The present invention is that technical solution problem adopts following technical scheme:
The design feature of fire foam experiment cup burner of the present invention arranges:
One liquid fuel tank 1, bottom it, fuel outlet is connected with combustion cup 15 by flow regulating unit;
One rectangular parallelepiped foam cabin, a upright combustion cup cover on hatch on the left of its upper surface, described combustion cup is positioned on the position, axis of described combustion cup cover; The translucent cover that binds of a upright top closure on hatch on the right side of the upper surface in described foam cabin, at the top of the described translucent cover that binds, gas access is set, bind in translucent cover described, the waist being positioned at the translucent cover that binds is provided with gas screens, described in bind and be packaged with foam between the bottom sleeve of translucent cover and foam hatch and sieve; Be in foam the top of sieve occurs and is positioned at the below of gas screens towards the foam solution shower nozzle that sieve occurs foam, the foam solution conduit be connected with described foam solution shower nozzle runs through the translucent cover that binds on the sidewall of translucent cover that binds.
The design feature of fire foam experiment cup burner of the present invention is also:
Arrange an air intake on the right side in described foam cabin, below that is inner in the left side in described foam cabin, that be arranged in combustion cup cover arranges one to the sloping baffle of described combustion cup cover drainage foam.
The described translucent cover that binds is arranged in bottom sleeve by intermediate casing, and the height that foam solution shower nozzle distance foam produces sieve can regulate by changing the height of translucent cover in described intermediate casing that bind; Arrange the fixed support being with circular cranse, the translucent cover that binds is bearing in described support bracket fastened circular cranse.
The vibrational power flow of described flow regulating unit is: described fuel tank is seated on fuel tank bracket, the bottom fuel outlet of fuel tank is connected with the fuel adjusting case be positioned at below fuel tank with conduit by first flow variable valve, the sidepiece of described fuel adjusting case is provided with the overflow vent be connected with run-down pipe, and the height of described overflow vent is consistent with the rim of a cup height of combustion cup; The outlet at bottom of described fuel adjusting case is connected with the bottom inlet of combustion cup with fuel conductor by second adjustable valve, stream guiding tube, the 3rd flow control valve successively; Between described stream guiding tube and the 3rd flow control valve, be provided with earial drainage arm, earial drainage arm be provided with earial drainage switch; Described earial drainage arm and run-down pipe lead to fuel recovery case.
The gas that froths imported in the top gas entrance of the described translucent cover that binds is: the mixing of air, nitrogen, argon gas, carbon dioxide, heptafluoro-propane, HFC-236fa or this several gas.
Liquid fuel in described liquid fuel tank is the liquid fuel such as methyl alcohol, ethanol, heptane, gasoline, kerosene or diesel oil.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the invention provides one for studying the apparatus of fire foam fire extinguishing correlated performance, having filled up the blank that cup burner fire extinguishing agent extinguishing property is measured, made the measurement of the relevant extinguishing property of fire foam and be determined to be possibility.
2, test function of the present invention is various, not only can realize the test function of polytype fire foam, can also realize various gas extinguishing agent and the symphyogenetic test function of variety classes fire foam.
3, conveniently, foaming is easy rapidly, a large amount of fire foam of disposable sustainable generation for foam-making apparatus operation of the present invention and measure control.
4, can use Multi liquid fuel in the present invention, it is convenient to change, and after experiment terminates, extra fuel can be recycled, and avoids waste.
5, apparatus structure of the present invention is simple, for convenience detach, is easy to cleaning, easily assembles.
6, in combustion cup of the present invention, level of fuel can keep invariable, makes measure and study rationally more scientific.
7, apparatus of the present invention processing ease, measure accurately, parameter is easy to control, reproducible.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the present invention;
Fig. 2 is plan structure schematic diagram of the present invention;
Fig. 3 is foam cabin structure schematic diagram in the present invention;
Fig. 4 is foam generation sieve structure schematic diagram in the present invention;
Fig. 5 a and Fig. 5 b is respectively gas rectifying device structure master in the present invention and looks and schematic top plan view;
Fig. 6 is the translucent cover supporting structure schematic diagram that binds in the present invention;
Number in the figure: 1 fuel tank, 2 sidepiece frames, 3 run-down pipes, 4 fuel tank brackets, 5 first flow variable valve, 6 conduits, 7 fuel adjusting casees, 8 second adjustable valves, 9 stream guiding tube, 10 earial drainage switches, 11 earial drainage arms, 12 fuel recovery casees, 13 collection box supports, 14 combustion cup covers, 15 combustion cups, 16 cloche supports, 17 the 3rd flow control valves, 18 fuel conductors, 19 gas accesses, 20 fixed supports, 21 foam solution conduits, 22 gas screenses, 23 bind translucent cover, 24 foam solution shower nozzles, 25 intermediate casings, 26 bottom sleeve, 27 air intakes, 28 foam cabins, 29 gantry base, 30 foams sieve, 31 sloping baffles.
Embodiment
See the vibrational power flow of fire foam experiment cup burner in Fig. 1, Fig. 2 and Fig. 3 the present embodiment be:
The bottom fuel outlet of liquid fuel tank 1 is connected with combustion cup 15 by flow regulating unit, liquid fuel tank 1 be arranged on be positioned at sidepiece frame 2 top fuel tank support 4 on.
Rectangular parallelepiped foam cabin 28 is the foams holding the generation of foam generation sieve 30, and using foam cabin as the mixing chamber of oxygenant and fire extinguishing agent, a circular hatch is opened on the left of the upper surface of foam cabin, hatch edge is equipped with cloche support 16, a upright combustion cup cover 14 in it, combustion cup 15 is positioned on the axis of combustion cup cover 14, to ensure that fuel and oxygenant coaxially flow, is formed cup burner with combustion cup cover 14 and combustion cup 15; The translucent cover 23 that binds of a upright top closure on hatch on the right side of the upper surface in foam cabin 28, at the top of the translucent cover 23 that binds, gas access 19 is set, binding in translucent cover 23, the position being positioned at waist arranges gas screens 22, as shown in figure 5 a and 5b, gas screens 22 is longitudinal porous cellular column structure, in the bottom of binding translucent cover 23,40 object circular filter nets are packaged with as foam generation sieve 30, as shown in Figure 4 between the bottom sleeve 26 of cloche and foam cabin 28; Be in the top of foam generation sieve 30 and be positioned at the below of gas screens 22 towards the foam solution shower nozzle 24 of foam generation sieve 30, after the foam solution conduit 21 be connected with foam solution shower nozzle 24 passes from the centre of gas screens 22, the sidewall of translucent cover 23 that binds runs through the translucent cover 23 that binds, is formed frother with this.One deck foam solution film is formed after foam solution is sprayed onto on foam generation sieve 30, the gas entered from gas access 19 is after the rectification of gas screens 22, the smooth air formed blows out foam from the hole order of foam generation sieve 30, enter foam cabin 28, be pressed on bottom sleeve 26 on foam generation sieve 30 upper surface shown in Fig. 4 in madial wall shape funnel-form in 90 °, concentrate in order to foam solution and be sprayed on foam generation sieve 30.
Fig. 1 be shown in foam cabin 28 right face side air intake 27 is set, inside left in foam cabin 28, the below being arranged in combustion cup cover 14 arrange one to the sloping baffle 31 of combustion cup cover drainage foam, sloping baffle 31 can be set to 45 ° of inclinations, the air entered from air intake 27 will promote foam and the foam that sieve produces occurs move to the left in foam cabin 28, moving upward along sloping baffle 31 after arriving sloping baffle 31 enters in the combustion cup cover of cup burner, continues to move upward under the impetus of air.By regulating the air mass flow of air intake 27 can control foam in foam cabin 28 to the movement velocity in combustion cup cover 14, realize the fire extinction by foam experiment of different in flow rate.
See Fig. 6, on the right side of the upper surface in foam cabin 28, hatch arranges bottom sleeve 26, the translucent cover 23 that binds is arranged in bottom sleeve 26 by intermediate casing 25, bind the height adjustable of translucent cover 23 on the hatch of right side, in order to regulate the height of foam solution shower nozzle 24 above foam sieves, gantry base 29 arranges the fixed support 20 being with circular cranse, the translucent cover 23 that binds is bearing in the circular cranse of fixed support 20, make to bind translucent cover 23 structure more firmly, the bottom of fixed support 20 is fixedly installed on the side in foam cabin in gantry base 29.
As depicted in figs. 1 and 2, the vibrational power flow of flow regulating unit is: fuel tank 1 is seated on fuel cell fuel cassette carrier 4, the bottom fuel outlet of fuel tank 1 is connected with the fuel adjusting case 7 be positioned at below fuel tank with conduit 6 by first flow variable valve 5, be provided with the overflow vent be connected with run-down pipe 3 at the sidepiece of fuel adjusting case 7, the height of overflow vent is consistent with the rim of a cup height of combustion cup 15; The outlet at bottom of fuel adjusting case 7 is connected with the bottom inlet of fuel conductor 18 with combustion cup 15 by second adjustable valve 8, stream guiding tube 9, the 3rd flow control valve 17 successively; Between stream guiding tube 9 and the 3rd flow control valve 17, be provided with earial drainage arm 11, earial drainage arm be provided with earial drainage switch 10; Earial drainage arm 11 and run-down pipe 3 lead to fuel recovery case 12, fuel recovery case 12 is supported on collection box support 13, collection box support 13 and fuel tank support 4 are co-located on sidepiece frame 2, sidepiece frame 2 is arranged in " L " type with gantry base 29, and foam cabin 28 is fixedly installed in gantry base 29.
The gas that froths imported in the top gas entrance 19 of translucent cover 23 that binds is: the mixing of air, nitrogen, argon gas, carbon dioxide, heptafluoro-propane, HFC-236fa or this several gas.Liquid fuel in liquid fuel tank 1 is the liquid fuel such as methyl alcohol, ethanol, heptane, gasoline, kerosene or diesel oil.
During use, first accessed the air of certain flow by air intake 27, then in fuel tank 1, add appropriate liquid fuel, open first flow variable valve 5, liquid fuel is made to flow in fuel adjusting case 7, when there being fuel to flow out from run-down pipe 3, opening second adjustable valve 8 and the 3rd flow control valve 17, making fuel enter combustion cup 15, fuel in ignition combustion cup 15, regulate the 3rd flow control valve 17, keep the level of fuel in combustion cup 15 to be constant, make it smooth combustion, the air of certain flow is accessed in gas access 19, foam solution is accessed by foam solution conduit 21, be sprayed onto on foam generation sieve 30 by foam solution shower nozzle 24, the translucent cover 23 that binds is regulated to be inserted in the degree of depth in intermediate casing 25, the foam solution that foam solution shower nozzle 24 is sprayed spreads on foam generation sieve 30 to greatest extent, the air entered by gas access 19 is through the rectified action of gas screens 22, the smooth air formed goes out foam from foam generation sieve 30 blowing up and enters foam cabin 28, enter in the combustion cup cover 14 of cup burner by the guiding of sloping baffle 31 under the rolling action of the air entered from air intake 27, and the arrival combustion cup 15 place knock down the flame that moves upward.
By the air mass flow of adjustments of gas entrance 19, can there is from foam the foam bubble that sieve 30 blows out different foam expansion, realize low multiple, medium multiple and the foaming of high multiple.
Claims (5)
1. a fire foam experiment cup burner, is characterized in that arranging:
One liquid fuel tank (1), bottom it, fuel outlet is connected with combustion cup (15) by flow regulating unit;
One rectangular parallelepiped foam cabin (28), a upright combustion cup cover (14) on hatch on the left of its upper surface, described combustion cup (15) is positioned on the position, axis of described combustion cup cover (14); The translucent cover that binds (23) of a upright top closure on hatch on the right side of the upper surface of described foam cabin (28), at the top of the described translucent cover that binds (23), gas access (19) is set, in the described translucent cover that binds (23), the waist being positioned at the translucent cover that binds is provided with gas screens (22), described in bind and be packaged with foam between the bottom sleeve (26) of translucent cover and foam hatch and sieve (30); Be in foam sieve the top of (30) and be positioned at the below of gas screens (22) towards the foam solution shower nozzle (24) that foam sieves (30), the foam solution conduit (21) be connected with described foam solution shower nozzle (24) runs through the translucent cover (23) that binds on the sidewall of the translucent cover that binds (23);
The gas that froths imported in the top gas entrance (19) of the described translucent cover that binds (23) is: the mixing of air, nitrogen, argon gas, carbon dioxide, heptafluoro-propane, HFC-236fa or this several gas.
2. fire foam experiment cup burner according to claim 1, it is characterized in that: arrange an air intake (27) on the right side of described foam cabin (28), below that is inner in the left side of described foam cabin (28), that be arranged in combustion cup cover (14) arranges one to the sloping baffle (31) of described combustion cup cover drainage foam.
3. fire foam experiment cup burner according to claim 1, it is characterized in that: described in the translucent cover (23) that binds be arranged in bottom sleeve (26) by intermediate casing (25), the height that foam solution shower nozzle (24) distance foam produces sieve (30) can be regulated by the change height of translucent cover (23) in described intermediate casing (25) that bind; Arrange the fixed support (20) being with circular cranse, the translucent cover that binds (23) is bearing in the circular cranse of described fixed support (20).
4. fire foam experiment cup burner according to claim 1, it is characterized in that: the vibrational power flow of described flow regulating unit is: described fuel tank (1) is seated on fuel tank bracket (4), the bottom fuel outlet of fuel tank (1) is connected with the fuel adjusting case (7) be positioned at below fuel tank with conduit (6) by first flow variable valve (5), the overflow vent be connected with run-down pipe (3) is provided with at the sidepiece of described fuel adjusting case (7), the height of described overflow vent is consistent with the rim of a cup height of combustion cup (15), the outlet at bottom of described fuel adjusting case (7) is connected with the bottom inlet of fuel conductor (18) with combustion cup (15) by second adjustable valve (8), stream guiding tube (9), the 3rd flow control valve (17) successively, between described stream guiding tube (9) and the 3rd flow control valve (17), be provided with earial drainage arm (11), earial drainage arm be provided with earial drainage switch (10), described earial drainage arm (11) and run-down pipe (3) lead to fuel recovery case (12).
5. fire foam experiment cup burner according to claim 1, is characterized in that: the liquid fuel in described liquid fuel tank (1) is methyl alcohol, ethanol, heptane, gasoline, kerosene or diesel oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438549.4A CN103454387B (en) | 2013-09-24 | 2013-09-24 | Cup type combustor for foam extinguishing agent experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438549.4A CN103454387B (en) | 2013-09-24 | 2013-09-24 | Cup type combustor for foam extinguishing agent experiment |
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| Publication Number | Publication Date |
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| CN103454387A CN103454387A (en) | 2013-12-18 |
| CN103454387B true CN103454387B (en) | 2015-06-24 |
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| CN201310438549.4A Expired - Fee Related CN103454387B (en) | 2013-09-24 | 2013-09-24 | Cup type combustor for foam extinguishing agent experiment |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597210B (en) * | 2015-01-21 | 2016-08-17 | 中国计量学院 | A kind of powder extinguishing chemical dispersal device |
| CN107643363A (en) * | 2016-11-30 | 2018-01-30 | 国家安全生产监督管理总局化学品登记中心 | A kind of device and method for being used to determine gas extinguishing agent flame-extinguishing concentration |
| CN109490459B (en) * | 2018-12-07 | 2023-07-14 | 中国科学技术大学 | Measuring device and measuring method for sealing performance of fire-fighting foam |
| CN110345473B (en) * | 2019-08-01 | 2024-05-28 | 中国科学技术大学 | Fuel supply device for cup burner |
| CN115581876A (en) * | 2022-09-05 | 2023-01-10 | 中国矿业大学 | Gas-liquid coaxial jet type foam generating device |
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2013
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Patent Citations (5)
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