CN103454387A - Cup type combustor for foam extinguishing agent experiment - Google Patents
Cup type combustor for foam extinguishing agent experiment Download PDFInfo
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- CN103454387A CN103454387A CN2013104385494A CN201310438549A CN103454387A CN 103454387 A CN103454387 A CN 103454387A CN 2013104385494 A CN2013104385494 A CN 2013104385494A CN 201310438549 A CN201310438549 A CN 201310438549A CN 103454387 A CN103454387 A CN 103454387A
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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
By the low speed coaxial flow of Hirst and Booth invention, being got angry the earliest, flame device---cup burner is widely used in the measurement of various gas extinguishing agent extinguishing concentrations 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, coaxial flowing.And fire extinguishing agent mainly enters the flame combustion district by the rolling action of oxygenant, due to the fuel equivalence ratio of control combustion, much smaller than 1, so flame can obtain sufficient oxygen, reduces the impact of flowing on flame.With actual flame combustion, compare, the flame in cup burner is more stable, and the needed foamite amount of knock down the flame is bigger than normal, and measurement result has the larger margin of safety.The method of 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) at present, becomes the universal standard of measurement gas extinguishing concentration.
Fire foam is to put out the category-B fire, the desirable fire extinguishing agent of especially various fuel oil fire.Observe summary according to a large amount of experiments known, fire extinction by foam is mainly to interact by foam and flame, produces the water vapor dilution oxygen in absorbing and cooling temperature, and froth bed also plays the effect that stops heat radiation and oxygen supply simultaneously.According to national standard " GB15308-2006 fire foam " known present stage, extinguishing property detection for fire foam is mainly the experimental provision that adopts large scale, is used for measuring the parameter that 90% of fire foam is controlled the macroscopic views such as fire time, 99% fiery time of control, attack time, 25% anti-burning time.Because the proving installation size of using is larger, difficult parameters is accurately to control, and environmental factor is larger on the impact of experiment, cause the repeatability of experiment bad, it is higher that meanwhile this large-sized experiment detects danger, mainly by Fire Research Station, born, and test is not to facilitate very much.For now, also there is no the result of use extinguishing property proving installation of fire foam preferably both at home and abroad.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, a kind of fire foam experiment cup burner is provided, test the extinguishing property of various fire foams as experimental provision, overcome existing fire foam extinguishing property and test inconvenient deficiency, it has that size is little, simple in structure simultaneously, favorable repeatability, parameter are easy to control, easy to operate, survey the advantages such as design that data can be applied to large-sized fire extinguishing system.
The present invention is that the technical solution problem adopts following technical scheme:
Fire foam experiment of the present invention is to arrange by the design feature of cup burner:
One liquid fuel tank 1, its bottom fuel outlet is connected with combustion cup 15 by flow regulating unit;
One rectangular parallelepiped foam cabin, a upright combustion cup cover on its upper surface left side hatch, 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 the hatch of the upper surface right side in described foam cabin, top at the described translucent cover that binds arranges gas access, in the described translucent cover that binds, the waist that is positioned at the translucent cover that binds is provided with the gas screens, is packaged with foam between the bottom sleeve of the described translucent cover that binds and foam hatch and sieves; Be in the below that foam top of sieve occurs and is positioned at the gas screens towards the foam solution shower nozzle of foam generation sieve, 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.
Fire foam experiment of the present invention also is by the design feature of cup burner:
Right side in described foam cabin arranges an air intake, inner in the left side in described foam cabin, be arranged in the combustion cup cover below a sloping baffle to described combustion cup cover drainage foam is set.
The described translucent cover that binds is arranged on bottom sleeve by intermediate casing, and the height that the foam solution shower nozzle produces sieve apart from foam can be regulated by the change height of translucent cover in described intermediate casing that bind; Fixed support with circular cranse is set, and the translucent cover that binds is bearing in described support bracket fastened circular cranse.
The structure of described flow regulating unit is set to: described fuel tank is seated on the fuel tank carriage, the bottom fuel outlet of fuel tank is connected with the fuel adjusting case that is positioned at the fuel tank below by first flow variable valve and conduit, sidepiece at 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 by second adjustable valve, stream guiding tube, the 3rd flow control valve and fuel conductor successively; Be provided with the earial drainage arm between described stream guiding tube and the 3rd flow control valve, be provided with the earial drainage switch on the earial drainage arm; Described earial drainage arm and run-down pipe lead to the 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 these several gases.
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, filled up the blank that cup burner fire extinguishing agent extinguishing property is measured, make measurement and the judgement of the relevant extinguishing property of fire foam become 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 agents and the symphyogenetic test function of variety classes fire foam.
3, foam-making apparatus operation of the present invention and measure control are convenient, and foaming is easy rapidly, a large amount of fire foams of disposable sustainable generation.
4, can use Multi liquid fuel in the present invention, it is convenient to change, and after experiment finishes, unnecessary fuel can be recycled, and has avoided waste.
5, apparatus structure of the present invention is simple, for convenience detach, is easy to clean, easily assembling.
6, in combustion cup of the present invention, level of fuel can keep invariable, make measure and study more scientific rationally.
7, apparatus of the present invention processing ease, measure accurately, parameter is easy to control, reproducible.
The accompanying drawing explanation
Fig. 1 is master's 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 are respectively gas rectifying device structure master in the present invention and look 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 carriages, 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 translucent covers that bind, 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
Referring to fire foam experiment in Fig. 1, Fig. 2 and Fig. 3 the present embodiment, by the structure of cup burner, be set to:
The bottom fuel outlet of liquid fuel tank 1 is connected with combustion cup 15 by flow regulating unit, and liquid fuel tank 1 is arranged on the fuel tank support 4 that is positioned at sidepiece frame 2 tops.
Rectangular parallelepiped foam cabin 28 is to hold foam the foam that sieve 30 produces occurs, and using the mixing chamber of foam cabin as oxygenant and fire extinguishing agent, foam cabin upper surface left side opening one circular hatch, the 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 guarantee fuel and oxygenant, coaxially flows, and with combustion cup cover 14 and combustion cup 15, forms cup burner; The translucent cover 23 that binds of a upright top closure on the hatch of the upper surface right side in foam cabin 28, top at the translucent cover 23 that binds arranges gas access 19, in the translucent cover 23 that binds, the position that is positioned at waist arranges gas screens 22, as shown in Fig. 5 a and Fig. 5 b, gas screens 22 is longitudinal porous cellular column structure, in the bottom of binding translucent cover 23, be packaged with a circular screen pack of 40 purposes between the bottom sleeve 26 of cloche and foam cabin 28, as foam, sieve 30 occur, as shown in Figure 4; Be in the below that foam top of sieve 30 occurs and is positioned at gas screens 22 towards the foam solution shower nozzle 24 of foam generation sieve 30, the foam solution conduit 21 be connected with foam solution shower nozzle 24 is from the centre of gas screens 22 is passed, run through the translucent cover 23 that binds on the sidewall of translucent cover 23 that binds, with this, form frother.After being sprayed onto on foam generation sieve 30, foam solution forms one deck foam solution film, after the rectification of the gas entered from gas access 19 through gas screens 22, the smooth air formed blows out foam from the hole order of foam generation sieve 30, enter foam cabin 28, the bottom sleeve 26 be pressed on shown in Fig. 4 on foam generation sieve 30 upper surfaces forms 90 ° of funnel-forms at madial wall, in order to the concentrated foam that is sprayed at of foam solution, occurs to sieve on 30.
The right face side that Fig. 1 is shown in foam cabin 28 arranges air intake 27, the inside left in foam cabin 28, be arranged in combustion cup cover 14 below a sloping baffle 31 to combustion cup cover drainage foam is set, sloping baffle 31 can be set to 45 ° of inclinations, the air entered from air intake 27 will promote foam foam motion to the left in foam cabin 28 that sieve produces occurs, in moving upward along sloping baffle 31 the combustion cup cover that enters into cup burner after arrival sloping baffle 31, under the impetus of air, continue to move upward.Can control the foam movement velocity interior to combustion cup cover 14 in foam cabin 28 by the air mass flow of regulating air intake 27, realize the fire extinction by foam experiment of different in flow rate.
Referring to Fig. 6, on the hatch of the upper surface right side in foam cabin 28, bottom sleeve 26 is set, the translucent cover 23 that binds is arranged on bottom sleeve 26 by intermediate casing 25, the height of translucent cover 23 on the hatch of right side that bind is adjustable, in order to regulate the height of foam solution shower nozzle 24 above foam sieves, fixed support 20 with circular cranse is set on gantry base 29, the translucent cover 23 that binds is bearing in the circular cranse of fixed support 20, translucent cover 23 structures that make to bind are more firm, and the bottom of fixed support 20 is fixedly installed on the side in foam cabin on gantry base 29.
As depicted in figs. 1 and 2, the structure of flow regulating unit is set to: fuel tank 1 is seated on fuel tank fuel tank carriage 4, the bottom fuel outlet of fuel tank 1 is connected with the fuel adjusting case 7 that is positioned at the fuel tank below by first flow variable valve 5 and conduit 6, sidepiece at fuel adjusting case 7 is provided with the overflow vent be connected with run-down pipe 3, and 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 combustion cup 15 by second adjustable valve 8, stream guiding tube 9, the 3rd flow control valve 17 and fuel conductor 18 successively; Be provided with earial drainage arm 11 between stream guiding tube 9 and the 3rd flow control valve 17, be provided with earial drainage switch 10 on the earial drainage arm; 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 the setting of " L " type with gantry base 29, and foam cabin 28 is fixedly installed on 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 these several gases.Liquid fuel in liquid fuel tank 1 is the liquid fuel such as methyl alcohol, ethanol, heptane, gasoline, kerosene or diesel oil.
During use, at first by the air of air intake 27 access certain flow, then in fuel tank 1, add appropriate liquid fuel, open first flow variable valve 5, liquid fuel is flowed in fuel adjusting case 7, when having fuel to flow out from run-down pipe 3, open second adjustable valve 8 and the 3rd flow control valve 17, make fuel enter combustion cup 15, fuel in ignition combustion cup 15, regulate the 3rd flow control valve 17, it is constant keeping the level of fuel in combustion cup 15, makes it smooth combustion, the air of access certain flow in gas access 19, by foam solution conduit 21 access foam solutions, being sprayed onto foam by foam solution shower nozzle 24 occurs on sieve 30, the adjusting translucent cover 23 that binds is inserted in the degree of depth in intermediate casing 25, the foam solution that foam solution shower nozzle 24 is sprayed spreads into to greatest extent foam and occurs on sieve 30, 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 ups and enters foam cabin 28, guiding by sloping baffle 31 under the rolling action of the air entered from air intake 27 enters in the combustion cup cover 14 of cup burner, and the arrival combustion cup 15 place's knock down the flames that move upward.
By the air mass flow of adjustments of gas entrance 19, can the foam bubble that sieve 30 blows out different foam expansion occur from foam, realize low multiple, medium multiple and the foaming of high multiple.
Claims (6)
1. cup burner is used in a fire foam experiment, it is characterized in that arranging:
One liquid fuel tank (1), its bottom 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 its upper surface left side hatch, 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 the hatch of the upper surface right side in 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 that is positioned at the translucent cover that binds is provided with gas screens (22), is packaged with foam between the bottom sleeve of the described translucent cover that binds (26) and foam hatch and sieves (30); Be in the below that foam sieves the top of (30) and is positioned at 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 that binds (23) on the sidewall of the translucent cover that binds (23).
2. fire foam according to claim 1 is tested and is used cup burner, it is characterized in that: on the right side in described foam cabin (28), an air intake (27) is set, in the left side in described foam cabin (28), below inner, that be arranged in combustion cup cover (14) arranges a sloping baffle (31) to described combustion cup cover drainage foam.
3. fire foam according to claim 1 is tested and is used cup burner, it is characterized in that: it is upper that the described translucent cover that binds (23) is arranged on bottom sleeve (26) by intermediate casing (25), and the height that foam solution shower nozzle (24) produces sieve (30) apart from foam can be regulated by the change height of translucent cover (23) in described intermediate casing (25) that bind; Fixed support (20) with circular cranse is set, and the translucent cover that binds (23) is bearing in the circular cranse of described fixed support (20).
4. fire foam according to claim 1 is tested and is used cup burner, it is characterized in that: the structure of described flow regulating unit is set to: described fuel tank (1) is seated on fuel tank carriage (4), the bottom fuel outlet of fuel tank (1) is connected with the fuel adjusting case (7) that is positioned at the fuel tank below by first flow variable valve (5) and conduit (6), sidepiece at described fuel adjusting case (7) is provided with the overflow vent be connected with run-down pipe (3), and 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 combustion cup (15) by second adjustable valve (8), stream guiding tube (9), the 3rd flow control valve (17) and fuel conductor (18) successively; Be provided with earial drainage arm (11) between described stream guiding tube (9) and the 3rd flow control valve (17), be provided with earial drainage switch (10) on the earial drainage arm; Described earial drainage arm (11) and run-down pipe (3) lead to fuel recovery case (12).
5. cup burner is used in fire foam experiment according to claim 1, and it is characterized in that: 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 these several gases.
6. cup burner is used in fire foam experiment according to claim 1, and it 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 |
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| 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 true CN103454387A (en) | 2013-12-18 |
| CN103454387B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104597210A (en) * | 2015-01-21 | 2015-05-06 | 杨康莉 | Powdered fire-extinguishing agent dispersion 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 |
| CN109490459A (en) * | 2018-12-07 | 2019-03-19 | 中国科学技术大学 | A kind of measuring device and measuring method of fire-fighting foams sealing performance |
| CN110345473A (en) * | 2019-08-01 | 2019-10-18 | 中国科学技术大学 | A kind of fuel supply system 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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 |
| CN110345473A (en) * | 2019-08-01 | 2019-10-18 | 中国科学技术大学 | A kind of fuel supply system for cup burner |
| 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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| CN103454387B (en) | 2015-06-24 |
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