CN102493830B - Temperature-controlled liquid nitrogen fire preventing and extinguishing device for mine - Google Patents
Temperature-controlled liquid nitrogen fire preventing and extinguishing device for mine Download PDFInfo
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- CN102493830B CN102493830B CN 201110437049 CN201110437049A CN102493830B CN 102493830 B CN102493830 B CN 102493830B CN 201110437049 CN201110437049 CN 201110437049 CN 201110437049 A CN201110437049 A CN 201110437049A CN 102493830 B CN102493830 B CN 102493830B
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- liquid nitrogen
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- heat
- pipe
- exchanger rig
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 49
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 210000005239 tubule Anatomy 0.000 claims description 19
- 238000005065 mining Methods 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 5
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 5
- 238000005485 electric heating Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009172 bursting Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The invention discloses a temperature-controlled liquid nitrogen fire preventing and extinguishing device for a mine. The temperature-controlled liquid nitrogen fire preventing and extinguishing device for the mine comprises a main pipe, wherein the front part of the main pipe is connected with the front end of a heat exchanging device, and the rear part of the main pipe is connected with the rear end of the heat exchanging device; the heat exchanging device is connected in parallel with a branched pipe and arranged inside a barrel cover; the branched pipe is arranged outside the barrel cover; the front end of the branched pipe is communicated with the front part of the main pipe through a branched pipe valve; the middle part of the branched pipe is communicated with the middle part of the heat exchanging device through a bypass pipe; a bypass valve is arranged on the bypass pipe; and the rear end of the branched pipe is communicated with the rear part of the main pipe. A common pipe and a bracket on a working surface can be prevented from being damaged due to freezing, the fire extinguishing period can be shortened, and the temperature at a liquid nitrogen outlet can be adjusted by grades. The whole device has no any electric equipment and spark and is safe, therefore, the underground using requirement of the mine can be met, and the temperature-controlled liquid nitrogen fire preventing and extinguishing device is particularly suitable for rapidly and efficiently preventing and extinguishing mine fires through liquid nitrogen under the condition that no extra power such as electric heating and the like is provided under a coal mine.
Description
Technical field
The present invention relates to a kind of for the anti-extinguishing device of the liquid nitrogen under the coal mine.
Background technology
Liquid nitrogen extinguishment and other fire extinguishing relatively has characteristics such as blow-off velocity is fast, effect is remarkable, safe and reliable, simple to operate, and its low temperature and inertia can make spontaneous combustion fire district extinguish within a short period of time and pollution-free to subsurface environment.But exposed weak point during the liquid nitrogen preventing and extinguishing fire technology is put into practice at the scene: liquid nitrogen temperature is low excessively, and to the requirement height of transfer pipeline, common pipeline is very easily by bursting by freezing, and the support that cryogenic liquid also can freezing work plane hinders and annotates nitrogen; Temperature is too high to be equal to common nitrogen, has lost the temperature reduction performance of liquid nitrogen, and the anti-fire extinguishing cycle is long.Existing anti-fire extinguishing is carried in the liquid nitrogen process in the colliery, still lacks the controllable type adjusting device of liquid nitrogen temperature, and this also is problem demanding prompt solution of liquid nitrogen preventing and extinguishing fire technology.List of references: Chen Zuobin " with liquid nitrogen prevention and put out the down-hole breeding fire ", " mining safety and environmental protection " [J], 1985, (4): 1-6,33.
Summary of the invention
In order to overcome the common pipeline of existing anti-extinguishing device very easily by bursting by freezing, the support of freezing work plane, anti-long defective of fire extinguishing cycle, the invention provides the anti-extinguishing device of a kind of mining controllable temperature formula liquid nitrogen, this device can avoid common pipeline and force piece to be damaged by frost, shorten the fire extinguishing cycle, can realize the classification regulation and control of liquid nitrogen outlet temperature.
Technical scheme of the present invention is: this is mining, and the anti-extinguishing device of controllable temperature formula liquid nitrogen comprises the person in charge, being responsible for forward part links to each other with the front end of heat-exchanger rig, being responsible for the rear section links to each other with the rear end of heat-exchanger rig, heat-exchanger rig be in charge of in parallel, and be in charge of parallel with heat-exchanger rig, heat-exchanger rig is positioned at the tube cover, be in charge of and be positioned at outside the tube cover, being in charge of front end is connected with person in charge's forward part by minute pipe valve, be connected with the centre of heat-exchanger rig by bypass pipe in the middle of being in charge of, bypass valve is arranged on the bypass pipe, is in charge of the rear end and is connected with person in charge rear section, on the person in charge rear section after thermometer is installed in heat-exchanger rig and is in charge of sys node, supporting seat is positioned at the bottom of tube cover.
Described heat-exchanger rig comprises one-level temperature control valve and secondary temperature control valve, the one-level temperature control valve is arranged on one-level heat exchange tubule bundle and is responsible between the forward part, the secondary temperature control valve is arranged between secondary heat exchange tubule bundle and the bypass pipe, and every grade of heat exchange tubule bundle is the 2-20 root, and heat exchange tubule bundle is the 2-10 level.
Described tube is covered with flaring air intake, and the rear end of air intake is connected with two verge boards, and verge board is connected with transfers the wind handle.
The described outer wall of being in charge of is coated with the polyurathamc heat preserving and insulating material.
The present invention is used for the controllable type of liquid nitrogen outlet temperature and regulates, and is applicable under the coal mine that extra power such as no electrical heating provides the high efficiency of liquid nitrogen under the condition to prevent fire-fighting work.The effect of heat exchange tubule is to increase tube wall and distinguished and admirable contact area, strengthens heat exchange, thereby improves liquid nitrogen temperature, and by the temperature control of different progression, liquid nitrogen temperature can realize the controllable type adjusting between-180 ℃ ~ 0 ℃.The effect of being in charge of is that the big cold of realizing liquid nitrogen is carried, and the standby conveying of liquid nitrogen when the frosting of heat exchange tubule surface.The front opening size of tube cover can be regulated, and controls size by tube cover air quantity by regulating openings of sizes, thereby changes distinguished and admirable and heat exchange amount liquid nitrogen, reaches the purpose of control liquid nitrogen temperature, and the processing of tube cover is simple, uses its temperature control to be easy to realize.Whole device is provided with supporting seat outward, and is strong to the compliance of drift section.Apparatus structure is simple, and is in light weight, be convenient to carrying and install, safe and reliable, can effectively improve effective filling rate of liquid nitrogen, makes the anti-fire-fighting efficiency of liquid nitrogen improve 30%, but also be conducive to improve the air quality of down-hole local environment to have practicality widely.Whole device belongs to safe no-spark type without any electric power facility, meets instructions for use under the coal mine, and being particularly useful under the coal mine extra power such as no electrical heating or compressed air provides under the condition liquid nitrogen fast and the work of high-efficiency prevention and control mine fire.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the tube cover front-end architecture schematic diagram among Fig. 1.
Among the figure: be responsible for 1, tube cover 2, air intake 2-1, verge board 2-2 transfers wind handle 2-3, tube cover outer wall 2-4, one-level heat exchange tubule bundle 3 is in charge of 4, one-level temperature control valve 5-1, and secondary temperature control valve 5-2 divides pipe valve 5-3, bypass valve 5-4, supporting seat 6, thermometer 7, bypass pipe 8, heat-exchanger rig 9.
The specific embodiment
In Fig. 1, this is mining, and the anti-extinguishing device of controllable temperature formula liquid nitrogen comprises the person in charge 1, is responsible for 1 forward part and links to each other with the front end of heat-exchanger rig 9, is responsible for 1 rear section and links to each other with the rear end of heat-exchanger rig 9.Heat-exchanger rig 9 be in charge of 4 in parallelly, and be in charge of 4 parallel with heat-exchanger rig 9.Heat-exchanger rig 9 is positioned at tube cover 2, is in charge of 4 and is positioned at outside the tube cover 2.Be in charge of 4 front ends and be connected with the person in charge's 1 forward part by minute pipe valve 5-3, be in charge of 4 centres and be connected by the centre of bypass pipe 8 with heat-exchanger rig 9, bypass valve 5-4 is arranged on the bypass pipe 8, is in charge of 4 rear ends and is connected with the person in charge 1 rear section.On the person in charge 1 rear section after thermometer 7 is installed in heat-exchanger rig 9 and is in charge of 4 sys nodes.Supporting seat 6 is positioned at the bottom of tube cover 2.
Heat-exchanger rig 9 comprises one-level temperature control valve 5-1 and secondary temperature control valve 5-2, one-level temperature control valve 5-1 is arranged on one-level heat exchange tubule bundle 3 and is responsible between 1 forward part, secondary temperature control valve 5-2 is arranged between secondary heat exchange tubule bundle and the bypass pipe 8, every grade of heat exchange tubule bundle is the 2-20 root, and heat exchange tubule bundle is 2 grades (can 2-10 level).
Be in charge of 4 outer wall and be coated with the polyurathamc heat preserving and insulating material.
In Fig. 2, tube cover 2 is provided with flaring air intake 2-1, and the rear end of air intake 2-1 is connected with two verge board 2-2, and verge board 2-2 is connected with and transfers wind handle 2-3.
During use, liquid nitrogen enters from liquid nitrogen container and is responsible for 1, and at this moment, one-level temperature control valve 5-1, secondary temperature control valve 5-2 open, and divides pipe valve 5-3, bypass valve 5-4 to close, and liquid nitrogen stream is crossed two-stage heat exchange tubule.Air line, down-hole natural wind or booster provide distinguished and admirablely covers 2 flaring air intake 2-1 by tube and enters, through heat exchange tubule external surface, at heat exchange tubule place and the abundant heat convection of liquid nitrogen.Tube cover 2 is supported by supporting seat 6, by the angle of regulating two verge board 2-2 with the linkage of transferring wind handle 2-3 to be connected, to reach the purpose of control air quantity.Two verge board 2-2 can open to the left, and the optional position in adjustable extent all can be fixed.Thermometer 7 is used for measuring the temperature of liquid nitrogen fluid in the pipeline, and the temperature value that records is as thermoregulator foundation.If measured temperature is higher than required value, then can take following measure: tube is covered 2 left side openings reduce, the air quantity that enters is wherein reduced.One-level temperature control valve 5-1, bypass valve 5-4 are opened, and secondary temperature control valve 5-2, branch pipe valve 5-3 close, and make liquid nitrogen only by one-level heat exchange tubule bundle 3.If this moment, the temperature that records still was higher than required value, will divide pipe valve 5-3 to open, one-level temperature control valve 5-1, secondary temperature control valve 5-2, bypass valve 5-4 close, and liquid nitrogen are only flowed through be responsible for 1 and be in charge of 4, reduce the heat exchange amount, thereby make temperature drop to required value.The liquid nitrogen if heat exchanger tube 3 is flowed through for a long time, surperficial frosting influences the heat exchange effect, liquid nitrogen is only flowed through be responsible for 1 and be in charge of 4, reaches the purpose of the frost that disappears.If temperature is lower than required value, then above regulation and control step is regulated conversely and is got final product.Adjusting by liquid nitrogen is flowed through pipeline length and tube cover 2 openings of sizes can not damage near the equipment liquid nitrogen transfer pipeline and the fire district under the prerequisite that guarantees the required low temperature of fire extinguishing.
Claims (4)
1. a mining controllable temperature formula liquid nitrogen is prevented extinguishing device, the anti-extinguishing device of this is mining controllable temperature formula liquid nitrogen comprises to be responsible for and to be in charge of, being in charge of front end is connected with person in charge's forward part by minute pipe valve, being in charge of the rear end is connected with person in charge rear section, it is characterized in that: be responsible for forward part and link to each other with the front end of heat-exchanger rig, being responsible for the rear section links to each other with the rear end of heat-exchanger rig, heat-exchanger rig be in charge of in parallel, and be in charge of parallel with heat-exchanger rig, heat-exchanger rig is positioned at the tube cover, be in charge of and be positioned at outside the tube cover, be connected with the centre of heat-exchanger rig by bypass pipe in the middle of being in charge of, bypass valve is arranged on the bypass pipe, and on the person in charge rear section after thermometer is installed in heat-exchanger rig and is in charge of sys node, supporting seat is positioned at the bottom of tube cover.
2. mining controllable temperature formula liquid nitrogen according to claim 1 is prevented extinguishing device, it is characterized in that: heat-exchanger rig comprises one-level temperature control valve and secondary temperature control valve, the one-level temperature control valve is arranged on one-level heat exchange tubule bundle and is responsible between the forward part, the secondary temperature control valve is arranged between secondary heat exchange tubule bundle and the bypass pipe, every grade of heat exchange tubule bundle is the 2-20 root, and heat exchange tubule bundle is the 2-10 level.
3. mining controllable temperature formula liquid nitrogen according to claim 1 is prevented extinguishing device, it is characterized in that: tube is covered with flaring air intake, and the rear end of air intake is connected with two verge boards, and verge board is connected with transfers the wind handle.
4. mining controllable temperature formula liquid nitrogen according to claim 1 is prevented extinguishing device, and it is characterized in that: the outer wall of being in charge of is coated with the polyurathamc heat preserving and insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110437049 CN102493830B (en) | 2011-12-23 | 2011-12-23 | Temperature-controlled liquid nitrogen fire preventing and extinguishing device for mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110437049 CN102493830B (en) | 2011-12-23 | 2011-12-23 | Temperature-controlled liquid nitrogen fire preventing and extinguishing device for mine |
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| Publication Number | Publication Date |
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| CN102493830A CN102493830A (en) | 2012-06-13 |
| CN102493830B true CN102493830B (en) | 2013-08-07 |
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| CN 201110437049 Active CN102493830B (en) | 2011-12-23 | 2011-12-23 | Temperature-controlled liquid nitrogen fire preventing and extinguishing device for mine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174452B (en) * | 2013-04-16 | 2015-09-16 | 中国矿业大学 | Liquid nitrogen is from supercharging resistance chemoprevention fire extinguishing system |
| CN103233765B (en) * | 2013-04-28 | 2016-06-29 | 中国矿业大学(北京) | A kind of nitrogen injection device and the method realizing note nitrogen thereof |
| CN104265352B (en) * | 2014-10-10 | 2016-03-23 | 中煤平朔集团有限公司 | Fire-fighting grouting nitrogen-injection pipeline under coal mine and dismantling method thereof during withdrawal |
| CN116427988B (en) * | 2023-05-31 | 2024-01-23 | 中煤科工集团重庆研究院有限公司 | Gas mine surface drilling fire extinguishing method based on liquid nitrogen filling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1160056A1 (en) * | 1984-01-27 | 1985-06-07 | Восточное отделение Всесоюзного научно-исследовательского института горно-спасательного дела | Apparatus for extinguishing fires with inert foam |
| SU1286790A1 (en) * | 1985-02-05 | 1987-01-30 | Восточное Отделение Всесоюзного Научно-Исследовательского Института Горноспасательного Дела | Method of extinguishing fires |
| RU2199667C2 (en) * | 2000-11-23 | 2003-02-27 | Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт горноспасательного дела" | Procedure preventing and suppressing endogenous fires in developed space |
| CN2841966Y (en) * | 2005-10-27 | 2006-11-29 | 中国矿业大学 | Three-phase foam preparing apparatus for preventing and treating coal self-ignition |
| CN101411927A (en) * | 2008-09-09 | 2009-04-22 | 臧玉华 | Multifunctional liquid nitrogen extinguishment vehicle for alley way |
-
2011
- 2011-12-23 CN CN 201110437049 patent/CN102493830B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1160056A1 (en) * | 1984-01-27 | 1985-06-07 | Восточное отделение Всесоюзного научно-исследовательского института горно-спасательного дела | Apparatus for extinguishing fires with inert foam |
| SU1286790A1 (en) * | 1985-02-05 | 1987-01-30 | Восточное Отделение Всесоюзного Научно-Исследовательского Института Горноспасательного Дела | Method of extinguishing fires |
| RU2199667C2 (en) * | 2000-11-23 | 2003-02-27 | Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт горноспасательного дела" | Procedure preventing and suppressing endogenous fires in developed space |
| CN2841966Y (en) * | 2005-10-27 | 2006-11-29 | 中国矿业大学 | Three-phase foam preparing apparatus for preventing and treating coal self-ignition |
| CN101411927A (en) * | 2008-09-09 | 2009-04-22 | 臧玉华 | Multifunctional liquid nitrogen extinguishment vehicle for alley way |
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| CN102493830A (en) | 2012-06-13 |
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