CN111441815A - Automatic watering type fire extinguishing device in coal mine - Google Patents
Automatic watering type fire extinguishing device in coal mine Download PDFInfo
- Publication number
- CN111441815A CN111441815A CN202010298325.8A CN202010298325A CN111441815A CN 111441815 A CN111441815 A CN 111441815A CN 202010298325 A CN202010298325 A CN 202010298325A CN 111441815 A CN111441815 A CN 111441815A
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- CN
- China
- Prior art keywords
- cavity
- mine
- water
- sliding
- air bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003245 coal Substances 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims 1
- 238000002207 thermal evaporation Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229960001701 chloroform Drugs 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses an automatic water sprinkling type fire extinguishing device in a coal mine, which comprises a mine, wherein a first device cavity is formed in a bottom wall body in the mine, sliding cavities are symmetrically formed in the bottom wall body in the mine at the left side and the right side of the first device cavity, sliding plugs are connected in the sliding cavities in a sealing and sliding mode, and the sliding plugs and the inner wall of the sliding cavity, which is close to the first device cavity, form a sealed cavity. According to the invention, through arranging the air extraction mechanism, the thermal evaporation liquid and the water pumping mechanism, when a fire occurs in a mine, the thermal evaporation liquid is heated and evaporated, so that the two sliding plugs move oppositely, the telescopic air bag is stretched, and the air in the mine is extracted, so that the fire behavior is reduced, the fire behavior spreading speed is controlled, meanwhile, the sliding plugs pull the permanent magnets to move so as to enable the permanent magnets to sequentially approach each magnetic sheet, the elastic air bag is intermittently extruded, so that the elastic air bag pumps underground water sources to the water guide cavity and is sprayed out from the water outlet, the fire behavior is extinguished, a good fire extinguishing effect is achieved, and mine property is protected from loss.
Description
Technical Field
The invention relates to the field of underground fire extinguishing equipment of coal mines, in particular to an automatic water sprinkling type fire extinguishing device for a coal mine.
Background
At present, along with the need of social development, more and more coal mines are developed, so more and more mines are also created, the mines are a general term of roadways, chambers, equipment, ground buildings and structures forming an underground coal mine production system, and more coal mine resources exist in the mines, so that once a fire disaster occurs, great loss can be caused, and the mines are passages, and once the fire disaster occurs, the fire can rapidly spread, so that irreparable loss can be caused.
But inside current automatic type fire prevention extinguishing device is not suitable for the mine usually, because current automatic fire prevention extinguishing device adopts electronic fire extinguisher and alarm usually, not only installation cost is higher, and because there are more electronic chip and sensor in it, need arrange the special messenger for a long time to maintain and overhaul, so not only further the cost has increased, and this professional goes into in the mine and is not safe, consequently there is certain trouble to the maintenance of fire extinguishing apparatus, this has just led to the inside conflagration of taking place of mine, the intensity of a fire is uncontrollable, and then the loss that causes can be bigger and bigger.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an automatic water spraying type fire extinguishing device for a coal mine.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic sprinkling fire extinguishing device for a coal mine comprises a mine, wherein a first device cavity is arranged in the wall body of the bottom in the mine, sliding cavities are symmetrically arranged on the left side and the right side of the first device cavity in the wall body of the bottom in the mine, sliding plugs are connected in the sliding cavities in a sealing and sliding mode, the sliding plug and the inner wall of the sliding cavity close to the first device cavity form a sealed cavity, the sealed cavity is filled with thermal evaporation liquid, an air extracting mechanism for extracting air in the mine when fire occurs is arranged in the first device cavity, two second device cavities are symmetrically arranged at the position below the first device cavity in the wall body of the bottom in the mine, a water guide cavity is formed in the inner wall of the mine along the cross section shape of the inner wall, water outlets communicated with the water guide cavity are formed in the top of the inner wall of the mine, and a water pumping mechanism used for pumping underground water to the water outlets is installed in the second device cavity.
Preferably, the air extraction mechanism comprises a telescopic air bag fixedly installed between the top and the inner bottom of the first device cavity, permanent magnets are fixedly connected to two ends of the telescopic air bag, the permanent magnets are fixedly connected with sliding plugs on corresponding sides of the connecting rod through the connecting rod, the connecting rod is connected with the inner wall of the sliding cavity in a sealing and sliding mode, and an air extraction opening communicated with the telescopic air bag is formed in the inner bottom of the mine.
Preferably, the water pumping mechanism includes the elastic airbag of fixed mounting between the inner wall at second device chamber both ends, elastic airbag's interior top all is equipped with the magnetic sheet, elastic airbag's one end is through going out water chamber and water guide chamber intercommunication, it installs the check valve that only allows water to flow to the water guide chamber from elastic airbag to go out the water intracavity, elastic airbag's the other end passes through intake antrum and ground water source intercommunication, it installs the check valve that only allows water to flow to elastic airbag from ground water source to go into the water intracavity.
The invention has the following beneficial effects:
1. by arranging the thermal evaporation liquid, the sliding plugs and the air extraction mechanism, when a fire occurs in a mine, the temperature rises, the thermal evaporation liquid is heated and begins to evaporate gradually, the air pressure in the cavity in which the thermal evaporation liquid is positioned is increased, so that the two sliding plugs are pushed to slide back and forth, the two sliding plugs drive the permanent magnets on the sides of the sliding plugs to move synchronously through the connecting rods connected with the sliding plugs respectively, so that the telescopic air bag is stretched, the internal space of the telescopic air bag is increased after the telescopic air bag is stretched, the air pressure is reduced rapidly, and the air in the mine rapidly enters the telescopic air bag through the air extraction opening under the action of pressure difference, so that the air for combustion is not sufficiently supplied in the mine, and the effects of reducing;
2. through setting up water pumping mechanism, water guide chamber and delivery port, when the permanent-magnet piece was along with sliding plug synchronous motion, the permanent-magnet piece can be close to each magnetic sheet in proper order, and under the effect of magnetic repulsion, the permanent-magnet piece can intermittent type nature extrusion elasticity gasbag, makes elasticity gasbag with underground water source pump to the water guide chamber to spout from the delivery port, put out the intensity of a fire, thereby play good fire extinguishing effect, protect the mine property not receive the loss.
Drawings
FIG. 1 is a schematic structural view of an automatic sprinkler fire extinguishing apparatus for a coal mine according to the present invention;
fig. 2 is an enlarged schematic view of a structure of fig. 1.
In the figure: 1 mine, 2 first device cavity, 3 flexible gasbag, 4 permanent magnetism blocks, 5 smooth cavities, 6 sliding plugs, 7 connecting rods, 8 extraction openings, 9 water outlets, 10 second device cavity, 11 elastic gasbag, 12 magnetic sheets, 13 water inlet cavities, 14 water outlet cavities, 15 water guide cavities.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, the underground automatic watering fire extinguishing device for the coal mine comprises a mine 1, a first device cavity 2 is arranged in the bottom wall body in the mine 1, sliding cavities 5 are symmetrically arranged on the left side and the right side of the first device cavity 2 in the bottom wall body in the mine 1, sliding plugs 6 are connected in the sliding cavities 5 in a sealing and sliding mode, the sliding plugs 6 and the inner walls of the sliding cavities 5, which are close to the first device cavity 2, form a sealed cavity, and thermal evaporation liquid is filled in the sealed cavity.
Further, trichloromethane is adopted as the thermal evaporation liquid, the boiling point of the trichloromethane is 61-62 ℃, so that when the interior of the mine 1 catches fire, the temperature in the mine can be rapidly increased to be close to or even more than 60 ℃, and at the moment, the thermal evaporation liquid absorbs the heat in the mine 1 and begins to be gradually evaporated into gas, so that the air pressure in the cavity in which the thermal evaporation liquid is located is rapidly increased.
Install the air extraction mechanism that takes out the air in the mine 1 when firing in the first device chamber 2, air extraction mechanism includes the flexible gasbag 3 of fixed mounting between top and interior bottom in the first device chamber 2, the equal fixedly connected with permanent magnetism piece 4 in both ends of flexible gasbag 3, permanent magnetism piece 4 passes through connecting rod 7 and its smooth stopper 6 fixed connection who corresponds the side, the inner wall sealing sliding connection of connecting rod 7 and smooth chamber 5, the interior bottom of mine 1 all is equipped with the extraction opening 8 with flexible gasbag 3 intercommunication.
Two second device cavities 10 are symmetrically formed in the bottom wall body in the mine 1 and located below the first device cavity 2, a water guide cavity 15 is formed in the inner wall of the mine 1 along the cross section shape of the inner wall, a water outlet 9 communicated with the water guide cavity 15 is formed in the top of the mine 1, and a water pumping mechanism for pumping underground water to the water outlet 9 is installed in each second device cavity 10.
The water pumping mechanism comprises an elastic air bag 11 fixedly installed between the inner walls of the two ends of the second device cavity 10, magnetic sheets 12 are arranged at the inner top of the elastic air bag 11, one end of the elastic air bag 11 is communicated with a water guide cavity 15 through a water outlet cavity 14, a one-way valve only allowing water to flow to the water guide cavity 15 from the elastic air bag 11 is installed in the water outlet cavity 14, the other end of the elastic air bag 11 is communicated with an underground water source through a water inlet cavity 13, and a one-way valve only allowing water to flow to the elastic air bag 11 from the underground water source is installed in the water inlet cavity 13.
Furthermore, the lower end of the permanent magnet 4 and the lower end of the magnetic sheet 12 are of the same magnetic pole, so that when the permanent magnet 4 and the magnetic sheet 12 approach each other, magnetic repulsion force is generated between the permanent magnet and the magnetic sheet, and because the magnetic sheet 12 is fixedly connected to the inner top of the elastic airbag 11, when the permanent magnet 4 is displaced to a position right above one of the magnetic sheets 12, the magnetic sheet 12 is displaced downwards under the action of magnetic force, the part of the elastic airbag 11, which is positioned near the magnetic sheet 12, is depressed, the air pressure in the elastic airbag 11 is increased, and water is discharged from the water outlet cavity 14; when the permanent magnet 4 leaves the position right above the magnetic sheet 12, the elastic air bag 11 and the magnetic sheet 12 reset under the action of the self elasticity of the elastic air bag 11, the air pressure in the elastic air bag 11 is reduced, and therefore the underground water source can be extracted through the water inlet cavity 13.
Therefore, when the permanent magnets 4 approach the magnetic sheets 12 in sequence, the permanent magnets 4 intermittently press the elastic air bag 11, so that the elastic air bag 11 pumps the underground water source to the water guide cavity 15.
According to the invention, when a fire occurs in the mine 1, the internal temperature rises, the hot evaporating liquid is heated and begins to gradually evaporate, the air pressure in the cavity in which the hot evaporating liquid is located is increased, so that the two sliding plugs 6 are pushed to slide back and forth, the two sliding plugs 6 drive the permanent magnet blocks 4 on the sides of the sliding plugs through the connecting rods 7 connected with the sliding plugs respectively to synchronously move, so that the telescopic airbag 3 is stretched, after the telescopic airbag 3 is stretched, the internal space of the telescopic airbag is increased, the air pressure is rapidly reduced, and under the action of pressure difference, the air in the mine 1 rapidly enters the telescopic airbag 3 through the air extraction opening 8, so that the combustion air is not sufficiently supplied in the mine 1, and the effects of reducing the.
When the permanent magnets 4 synchronously move along with the sliding plug 6, the permanent magnets 4 are close to the magnetic sheets 12 in sequence, and under the action of magnetic repulsion, the permanent magnets 12 intermittently extrude the elastic air bag 11, so that the elastic air bag 11 pumps underground water sources to the water guide cavity 15 and sprays the underground water sources out of the water outlet 9, a fire can be extinguished, a good fire extinguishing effect is achieved, and property of a mine is protected from being lost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. An automatic water sprinkling fire extinguishing device for a coal mine underground comprises a mine (1) and is characterized in that a first device cavity (2) is arranged in the bottom wall body in the mine (1), sliding cavities (5) are symmetrically arranged on the left side and the right side of the first device cavity (2) in the bottom wall body in the mine (1), a sliding plug (6) is connected in the sliding cavity (5) in a sealing and sliding manner, the sliding plug (6) and the inner wall of the sliding cavity (5) close to the first device cavity (2) form a sealed cavity, hot evaporation liquid is filled in the sealed cavity, an air extraction mechanism for extracting air in the mine (1) during ignition is arranged in the first device cavity (2), two second device cavities (10) are symmetrically arranged at the lower part of the first device cavity (2) in the bottom wall body in the mine (1), and a water guide cavity (15) is arranged in the inner wall of the mine (1) along the cross-section shape of the inner wall, the top all is equipped with delivery port (9) with water guide chamber (15) intercommunication in mine (1), install in second device chamber (10) and be used for pumping the groundwater source to delivery port (9) pump water mechanism.
2. The automatic water sprinkling type fire extinguishing device for the coal mine according to claim 1, wherein the air extraction mechanism comprises a telescopic air bag (3) fixedly installed between the top and the inner bottom of the first device cavity (2), permanent magnets (4) are fixedly connected to both ends of the telescopic air bag (3), the permanent magnets (4) are fixedly connected with sliding plugs (6) on the corresponding sides through connecting rods (7), the connecting rods (7) are in sealing sliding connection with the inner wall of the sliding cavity (5), and an air suction opening (8) communicated with the telescopic air bag (3) is formed in the inner bottom of the mine (1).
3. The automatic water sprinkling fire extinguishing device for the coal mine according to claim 1, wherein the water pumping mechanism comprises an elastic air bag (11) fixedly installed between inner walls at two ends of the second device cavity (10), magnetic sheets (12) are arranged at the top of the elastic air bag (11), one end of the elastic air bag (11) is communicated with a water guide cavity (15) through a water outlet cavity (14), a one-way valve which only allows water to flow from the elastic air bag (11) to the water guide cavity (15) is installed in the water outlet cavity (14), the other end of the elastic air bag (11) is communicated with an underground water source through a water inlet cavity (13), and a one-way valve which only allows water to flow from the underground water source to the elastic air bag (11) is installed in the water inlet cavity (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010298325.8A CN111441815B (en) | 2020-04-16 | 2020-04-16 | Automatic watering type fire extinguishing device in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010298325.8A CN111441815B (en) | 2020-04-16 | 2020-04-16 | Automatic watering type fire extinguishing device in coal mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111441815A true CN111441815A (en) | 2020-07-24 |
| CN111441815B CN111441815B (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010298325.8A Active CN111441815B (en) | 2020-04-16 | 2020-04-16 | Automatic watering type fire extinguishing device in coal mine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275109A (en) * | 2020-11-12 | 2021-01-29 | 宝钛华神钛业有限公司 | Zirconium tetrachloride purification is with washing filter pressing device |
| CN112316338A (en) * | 2020-11-04 | 2021-02-05 | 王丽萍 | Directional fire-fighting device |
| CN112688195A (en) * | 2021-01-22 | 2021-04-20 | 胡云鑫 | Safe type switch board with emergent cooling structure of putting out a fire |
| CN112972933A (en) * | 2021-03-01 | 2021-06-18 | 山东滨津纺织科技有限公司 | Ceramic fiber non-woven fireproof cloth |
| CN113908477A (en) * | 2021-09-23 | 2022-01-11 | 黄扬扬 | Fire-fighting equipment for coal mine roadway |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004065417A (en) * | 2002-08-05 | 2004-03-04 | Kajima Corp | Disaster prevention system for tunnel |
| CN203879532U (en) * | 2014-01-20 | 2014-10-15 | 河南省岩石矿物测试中心 | Coal mine dust removal device |
| CN205349403U (en) * | 2015-12-21 | 2016-06-29 | 大同煤矿集团有限责任公司 | Intelligent spraying dedusting device of mine |
| CN110810077A (en) * | 2019-12-11 | 2020-02-21 | 薛尧文 | Farming big-arch shelter with automatically function of cooling down |
-
2020
- 2020-04-16 CN CN202010298325.8A patent/CN111441815B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004065417A (en) * | 2002-08-05 | 2004-03-04 | Kajima Corp | Disaster prevention system for tunnel |
| CN203879532U (en) * | 2014-01-20 | 2014-10-15 | 河南省岩石矿物测试中心 | Coal mine dust removal device |
| CN205349403U (en) * | 2015-12-21 | 2016-06-29 | 大同煤矿集团有限责任公司 | Intelligent spraying dedusting device of mine |
| CN110810077A (en) * | 2019-12-11 | 2020-02-21 | 薛尧文 | Farming big-arch shelter with automatically function of cooling down |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112316338A (en) * | 2020-11-04 | 2021-02-05 | 王丽萍 | Directional fire-fighting device |
| CN112275109A (en) * | 2020-11-12 | 2021-01-29 | 宝钛华神钛业有限公司 | Zirconium tetrachloride purification is with washing filter pressing device |
| CN112688195A (en) * | 2021-01-22 | 2021-04-20 | 胡云鑫 | Safe type switch board with emergent cooling structure of putting out a fire |
| CN112972933A (en) * | 2021-03-01 | 2021-06-18 | 山东滨津纺织科技有限公司 | Ceramic fiber non-woven fireproof cloth |
| CN113908477A (en) * | 2021-09-23 | 2022-01-11 | 黄扬扬 | Fire-fighting equipment for coal mine roadway |
| CN113908477B (en) * | 2021-09-23 | 2022-11-25 | 伊金霍洛旗振兴煤炭有限责任公司 | Fire-fighting equipment for coal mine roadway |
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| CN111441815B (en) | 2021-12-14 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211111 Address after: 272200 middle section of West Street, Xiaoyun Town, Jinxiang County, Jining City, Shandong Province Applicant after: Xiaoyun coal mine of Jining Mining Group Co., Ltd Address before: 030200 Shanxi Xishan Coal Power Co., Ltd., No. 48, Xiqu street, Xiqu village, Gujiao City, Taiyuan City, Shanxi Province Applicant before: Wu Wenxu |
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