CN102979552B - Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof - Google Patents
Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof Download PDFInfo
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- CN102979552B CN102979552B CN201210516368.4A CN201210516368A CN102979552B CN 102979552 B CN102979552 B CN 102979552B CN 201210516368 A CN201210516368 A CN 201210516368A CN 102979552 B CN102979552 B CN 102979552B
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- foam
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Abstract
The invention discloses a device for preventing coal from burning spontaneously and rapidly extinguishing under a coal mine and a working method thereof. The device comprises a cylindrical foamed shell of which the two ends contract, wherein one end of the foamed shell is connected with a compressed air line; one side of the compressed air line is provided with a foam stock solution inlet; the other end of the foamed shell is connected with a foam output pipeline; 6-8 groups of spiral blades are arranged on a hollow shaft of an axis in the foamed shell at certain intervals; air outlet holes are formed among the spiral blades; included angles between the turning directions of the spiral blades and the axial direction of the hollow shaft are 45-60 degrees; each group of spiral blades has the same turning direction; and two adjacent groups of spiral blades have opposite turning directions. A mixture is foamed twice, so that the foaming times are raised to 50-150 times rapidly within a short period of time, and the aims of preventing and controlling spontaneous turning of coal and rapidly extinguishing are fulfilled.
Description
Technical field
The present invention relates to for preventing and treating spontaneous combustionof coal and fast fire-extinguishing apparatus, in particular for control spontaneous combustionof coal and the fast fire-extinguishing apparatus of underground coal mine
Background technology
Coal mine gob is left over coal and easily freely burning fire is occurred under certain condition, and effectively putting out way is spray gel foam.
The foam-making apparatus of current employing mainly contains the net formula foam maker of fire-fighting, it is made up of air compressor, pressure vessel, the gentle liquid pipeline of foaming cylinder that metal grill is housed, this foam maker needs external connection power source, is not suitable for the operation of underground coal mine fire extinguishing.
" the three-phase froth generating means of control spontaneous combustionof coal " of the patent No. 02148411.2 China Mining University application, it comprises three-phase mixture (yellow mud or coal ash pulp and blowing agent) feed pipe, blender and is provided with the foam maker cylindrical shell of Venturi tube, polylith obstacle version is provided with in blender, foam maker cylindrical shell is provided with the pipeline injecting venturi throat, Venturi tube periphery is provided with the space of introducing gas, venturi tube inlet is provided with jet regulator, and foam maker cylindrical shell afterbody is provided with the slideway of adjustable current collector; It relies on the negative pressure introducing gas that material produces in Venturi tube, thus produces three-phase mixture foam, prevents and treats Conflagration Caused by Coal Self-ignition for colliery.The mixture such as yellow mud, flyash that this device relies on foaming to adopt is protected coal, thus reach the effect of control spontaneous combustionof coal, it is not enough: one be the mixture such as yellow mud, flyash produce three-phase froth contains larger particles, granularity is uneven, cannot the contact of thoroughly blocks air and coal when cannot be used for putting out a fire; Two is that coefficient of foaming is lower, only has about 30 times, has certain effect, can not realize the requirement of underground coal mine quick extinguishing to the spontaneous combustion of control underground coal; Three is that this foam maker will be placed obstacles plate in blender, and processing and manufacturing process is complicated, easily produces some retardation.
" foam maker for preventing and extinguishing fire of coal mine " of the patent No. 201110067937.7 Xi'an Xike Coal Mine Safety Ventilation Fire-prevention Institute Co., Ltd. application, the stirring vane be arranged on blender axis is set in blender, stirring vane is that spacer sleeve is loaded on the obstruct lengthy motion picture on blender axis and intercepts short-movie, intercept on lengthy motion picture and opening is set, make to form non-directional circulation passage in blender, extend the time that mixed serum is uniformly mixed in blender, mixed serum can fully be mixed.Its deficiency is: compared with the patent No. 02148411.2, and the balk board in blender has been changed into the axis with intercepting lengthy motion picture and obstruct short-movie, although not easily plugging, mixing effect is not good enough, and the coefficient of foaming of foam is lower.
Summary of the invention
In view of the deficiency of prior art, the invention provides a kind of structure simple, coefficient of foaming is high, can be used in the device preventing and treating spontaneous combustionof coal and quick extinguishing.
Technical scheme is, a kind of underground coal mine control spontaneous combustionof coal and fast fire-extinguishing apparatus, and it comprises the tubular foaming shell of a two ends reducing; One end of foaming shell is connected with compressed air line, and the side of compressed air line is provided with foam dope entrance, and the diameter of compressed air line is greater than the diameter of foam dope entrance; The other end of foaming shell is connected with foam output channel; Axis in foaming shell is provided with hollow shaft, hollow shaft is interval with 6 ~ 8 groups of helical blades, is provided with venthole between helical blade, the rotation direction of above-mentioned helical blade and the axial angle of hollow shaft are 45 ~ 60 degree, the rotation direction of each group helical blade is identical, and the rotation direction of two adjacent groups is contrary; The exit end of foaming shell is provided with foam screen.
In order to improve coefficient of foaming, be provided with auxiliary compressed air line in foaming shell side, auxiliary compressed air line is connected with one end of hollow shaft.
The screen distance of above-mentioned foam screen is preferably 0.5 ~ 2mm.
Above-mentioned helical blade spacing distance of often organizing is preferably the spacing of hollow shaft external surface to foaming shell inner surface.
It is three that above-mentioned helical blade often organizes the best, and arranges in triangle.
Operating principle of the present invention is, at underground coal mine, on the compressed air line that down-hole Compressed Gas steam line is connected to apparatus of the present invention and auxiliary compressed air line, Compressed Gas enters foaming shell inside, produce negative pressure in foam dope entrance simultaneously, suck foam dope, preliminary mixing, mixed gas, liquid fluid mixes further at helical blade place, the rotation direction of adjustable screw blade, different resistances can be provided to Compressed Gas and foam dope mixture, the blade of different rotation direction makes stirring action strengthen further, and tentatively foam, the amount of input Compressed Gas can be regulated by auxiliary compressed air line, thus change foam dope coefficient of foaming on foam screen, foam screen finally forms exquisiteness, stable gel foam, discharge from foam output channel.By regulating the inlet of auxiliary compression gas and selecting the aperture of foam screen, the gel foam coefficient of foaming of 50 ~ 150 times can be obtained.
Compared with prior art, the invention has the advantages that:
1, because the diameter of compressed air line is greater than the diameter of foam dope entrance, negative pressure is produced in foam dope entrance, under the stirring of helical blade, Compressed Gas and foam dope mixture is made tentatively to foam in foaming shell, for preventing and treating spontaneous combustionof coal and realizing fire extinguishing.
2, the auxiliary compressed air line by arranging makes the Compressed Gas of assisting from the venthole ejection be located at hollow shaft, carries out second time of foaming, make to bring up to rapidly 50 ~ 150 times in the coefficient of foaming short time, reach the object of quick extinguishing mixture.
3, the present invention does not have fiery device not want spcific power, and material is plugging not easily, uses reliable, compact conformation, easy to maintenance, is specially adapted to coal mine fire fighting operation.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention;
Fig. 2 is A-A profile in Fig. 1.
In figure: 1-compressed air line, 2-foam dope entrance, 3-foaming shell, 4-foam output channel, 5-hollow shaft, 6-venthole, 7-helical blade, 8-foam screen, 9-assists compressed air line.
Detailed description of the invention
Below in conjunction with accompanying drawing and several embodiment, technical scheme of the present invention is described further:
Embodiment one
As depicted in figs. 1 and 2, a kind of preventing and extinguishing fire of coal mine gel foam generating means, it comprises the tubular foaming shell 3 of a two ends reducing; One end of foaming shell 3 is connected with compressed air line 1, and the side of compressed air line 1 is provided with foam dope entrance 2, and the diameter of compressed air line 1 is greater than the diameter of foam dope entrance 2; The other end of foaming shell 3 is connected with foam output channel 4; Axis in foaming shell 3 is provided with hollow shaft 5, hollow shaft 5 is interval with six groups of helical blades 7, and spacing distance is the spacing of hollow shaft 5 external surface to foaming shell 3 inner surface.Between helical blade 7, be provided with venthole 6, the rotation direction of embodiment one helical blade 7 and the axial angle of hollow shaft 5 are 45 degree, and the rotation direction of each group helical blade 7 is identical, and the rotation direction of two adjacent groups helical blade 7 is contrary; Be provided with auxiliary compressed air line 9 in foaming shell 3 side, auxiliary compressed air line 9 is connected with one end of hollow shaft 5; The exit end of foaming shell 3 is provided with foam screen 8.The screen distance of foam screen 8 is 0.5mm.
Helical blade 7 in embodiment often group is three, and arranges in triangle.
On the compressed air line 1 that down-hole Compressed Gas steam line is connected to apparatus of the present invention and auxiliary compressed air line 9. Compressed Gas enters foaming shell 3 by compressed air line 1, by the adjustment of auxiliary compressed air line 9, the flow-rate ratio making the Compressed Gas and gel foam stoste entering housing 3 is 20:1, the rotation direction of helical blade 7 and the axial angle of hollow shaft 5 are 45 degree, the gas making to pass through, liquid fully mix, stirring through 6 groups of helical blades 7, is the rear gel foam forming 50 times of 0.5mm foam screen 8 by screen distance.
Embodiment two
Embodiment two is substantially identical with embodiment one, is 60 degree unlike the rotation direction of helical blade 7 and the axial angle of hollow shaft 5.During use, regulate auxiliary compressed air line 9, the flow-rate ratio making the Compressed Gas and gel foam stoste entering foaming shell 3 is 25:1, forms the gel foam of 80 times after foaming.
Embodiment three
Embodiment three is substantially identical with embodiment two, and unlike hollow shaft 5 being interval with eight groups of helical blades 7, the screen distance of foam screen is 2mm.During use, regulate auxiliary compressed air line 9, the flow-rate ratio making the Compressed Gas and gel foam stoste entering foaming shell 3 is 30:1, forms the gel foam of 120 times after foaming.
Embodiment four
Embodiment four is substantially identical with embodiment three, is 60 degree unlike the rotation direction of helical blade 7 and the axial angle of hollow shaft 5.During use, regulate auxiliary compressed air line 9, the flow-rate ratio making the Compressed Gas and gel foam stoste entering foaming shell 3 is 30:1, forms the gel foam of 150 times after foaming.
Claims (4)
1. underground coal mine control spontaneous combustionof coal and a fast fire-extinguishing apparatus, it is characterized in that, it comprises the tubular foaming shell of a two ends reducing; One end of foaming shell is connected with compressed air line, and the side of compressed air line is provided with foam dope entrance, and the diameter of compressed air line is greater than the diameter of foam dope entrance; The other end of foaming shell is connected with foam output channel; Axis in foaming shell is provided with hollow shaft, hollow shaft is interval with 6 ~ 8 groups of helical blades, is provided with venthole between helical blade, the rotation direction of above-mentioned helical blade and the axial angle of hollow shaft are 45 ~ 60 degree, the rotation direction of each group helical blade is identical, and the rotation direction of two adjacent groups is contrary; The exit end of foaming shell is provided with foam screen; Be provided with auxiliary compressed air line in foaming shell side, auxiliary compressed air line is connected with one end of hollow shaft.
2. underground coal mine control spontaneous combustionof coal as claimed in claim 1 and fast fire-extinguishing apparatus, it is characterized in that, the screen distance of described foam screen is 0.5 ~ 2mm.
3. underground coal mine control spontaneous combustionof coal as claimed in claim 1 and fast fire-extinguishing apparatus, it is characterized in that, above-mentioned helical blade often group is three, and arranges in triangle.
4. the underground coal mine control spontaneous combustionof coal as described in as arbitrary in claim 1-3 and the method for work of fast fire-extinguishing apparatus, it is characterized in that, at underground coal mine, down-hole Compressed Gas steam line is connected on underground coal mine control spontaneous combustionof coal and the compressed air line of fast fire-extinguishing apparatus and auxiliary compressed air line, Compressed Gas enters foaming shell inside, produce negative pressure in foam dope entrance simultaneously, suck foam dope, preliminary mixing, mixed gas, liquid fluid mixes further at helical blade place, the rotation direction of adjustable screw blade, different resistances is provided to Compressed Gas and foam dope mixture, the blade of different rotation direction makes stirring action strengthen further, and tentatively foam, the amount of input Compressed Gas is regulated by auxiliary compressed air line, change foam dope coefficient of foaming on foam screen, foam screen finally forms exquisiteness, stable gel foam, discharge from foam output channel, by regulating the inlet of auxiliary compression gas and selecting the aperture of foam screen, to obtain the gel foam coefficient of foaming of 50 ~ 150 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516368.4A CN102979552B (en) | 2012-12-05 | 2012-12-05 | Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516368.4A CN102979552B (en) | 2012-12-05 | 2012-12-05 | Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof |
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| Publication Number | Publication Date |
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| CN102979552A CN102979552A (en) | 2013-03-20 |
| CN102979552B true CN102979552B (en) | 2015-04-01 |
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| CN201210516368.4A Expired - Fee Related CN102979552B (en) | 2012-12-05 | 2012-12-05 | Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof |
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| CN103585726B (en) * | 2013-10-25 | 2016-08-17 | 中国矿业大学 | A kind of for foam gel preparing apparatus for mine fire preventing and extinguishing |
| CN103586981B (en) * | 2013-11-08 | 2015-12-09 | 中国矿业大学 | A kind of mine foam slurry mixer |
| CU24378B1 (en) * | 2014-06-24 | 2019-01-04 | Rusoh Inc | PORTABLE FIRE EXTINGUISHER WITH INTERNAL MIXTURE AND REPLACABLE GAS CARTRIDGE |
| CN104533501B (en) * | 2015-01-15 | 2017-01-04 | 山东科技大学 | A foam generating device for dust fall |
| CN105536191B (en) * | 2015-12-29 | 2018-12-04 | 中国石油化工股份有限公司 | Positive/negative-pressure couples apparatus for spray of foam |
| CN107435554B (en) * | 2017-07-20 | 2023-06-06 | 山西文龙中美环能科技股份有限公司 | Gas blending system and gas blending concentration control method |
| CN107725098B (en) * | 2017-11-08 | 2018-11-13 | 中国矿业大学(北京) | A kind of device of the prevention mined out flame range of underground coal mine |
| CN113134185A (en) * | 2020-01-20 | 2021-07-20 | 南京南瑞继保电气有限公司 | Foam generator reaches compressed air foam extinguishing device who contains it |
| CN111894652B (en) * | 2020-08-05 | 2022-08-30 | 中国矿业大学(北京) | Spontaneous combustion gel foam three-dimensional prevention and control system for steeply inclined coal seam |
| CN114470574B (en) * | 2022-01-27 | 2023-05-02 | 西安科技大学 | Gel and gel foam dual-purpose fire extinguishing system and method |
| CN114749043B (en) * | 2022-06-13 | 2022-08-12 | 四川环钻星空能源科技有限公司 | Foam generator for drilling fluid in oil field |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1587217A1 (en) * | 1988-05-04 | 1990-08-23 | Восточное Отделение Всесоюзного Научно-Исследовательского Института Горноспасательного Дела | Line for conveying foam into fire focus |
| CN1684741A (en) * | 2002-07-25 | 2005-10-19 | 奥尔登·奥兹门特 | Method and device for fighting fire in confined areas |
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| CN102979552A (en) | 2013-03-20 |
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