CN110425007B - Coal mine natural fire monitoring device based on fiber grating sensor - Google Patents
Coal mine natural fire monitoring device based on fiber grating sensor Download PDFInfo
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- CN110425007B CN110425007B CN201910691142.XA CN201910691142A CN110425007B CN 110425007 B CN110425007 B CN 110425007B CN 201910691142 A CN201910691142 A CN 201910691142A CN 110425007 B CN110425007 B CN 110425007B
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- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 205
- 238000005507 spraying Methods 0.000 claims abstract description 62
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 238000003860 storage Methods 0.000 claims abstract description 51
- 239000007921 spray Substances 0.000 claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims description 69
- 238000006243 chemical reaction Methods 0.000 claims description 53
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 23
- 239000004088 foaming agent Substances 0.000 claims description 16
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 14
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 14
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 24
- 239000000243 solution Substances 0.000 description 22
- 229910002092 carbon dioxide Inorganic materials 0.000 description 12
- 239000001569 carbon dioxide Substances 0.000 description 12
- 239000006260 foam Substances 0.000 description 12
- 238000001514 detection method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- XONPDZSGENTBNJ-UHFFFAOYSA-N molecular hydrogen;sodium Chemical compound [Na].[H][H] XONPDZSGENTBNJ-UHFFFAOYSA-N 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- 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
- E21F3/00—Cooling or drying of air
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention belongs to the technical field of coal mine fire monitoring, and particularly relates to a coal mine natural fire monitoring device based on a fiber bragg grating sensor; the water guide pipes are arranged on two sides of the bottom end of the roadway, and the end parts of the water guide pipes are connected with the high-pressure water pump; the water storage walls are uniformly laid on the inner wall of the roadway, and water storage cavities are formed in the water storage walls; the bottom end of the water storage wall is communicated with the water guide pipe, and the top end of the water storage wall is connected to the fixed through pipe; the outer wall of the water storage wall is provided with a water spraying convex strip; an elastic sealing ball is arranged in the water storage cavity and is arranged in the water spraying raised line in a sliding manner; a plurality of fiber bragg grating sensors are paved at the bottom end of the roadway; the grating regulator is electrically connected with the control terminal; the control terminal can control the water spray pressure of the high-pressure water pump, and then can adjust the area of the water curtain sprayed out of the water spray convex strip in the roadway, and then can cool down and extinguish fire at the temperature in the roadway or at the high temperature generated by fire.
Description
Technical Field
The invention belongs to the technical field of coal mine fire monitoring, and particularly relates to a coal mine natural fire monitoring device based on a fiber bragg grating sensor.
Background
The fiber grating sensor can realize direct measurement of physical quantities such as temperature, strain and the like. The wavelength of the fiber grating is sensitive to temperature and strain at the same time, namely the temperature and the strain simultaneously cause the coupling wavelength of the fiber grating to move, so that the temperature and the strain cannot be distinguished by measuring the coupling wavelength movement of the fiber grating.
The coal mine is a part with multiple accidents, particularly the coal mine is naturally ignited, when spontaneous combustion fire happens to the coal mine, the danger is very serious, the proportion is large, and the coverage area is quite wide. The possibility of natural fire exists in each mining area, and each spontaneous combustion fire in a coal mine can cause huge damage to coal resources and economic loss, and is accompanied with a great amount of casualties.
The existing natural fire monitoring device is difficult to monitor the distribution state of the temperature according to the fiber bragg grating sensor, and then the fire extinguishing device is controlled to extinguish fire for the temperatures generated in different areas, so that the fire extinguishing device generates certain waste, and the efficient fire extinguishing effect is difficult to achieve.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a coal mine natural fire monitoring device based on a fiber grating sensor, which is mainly used for solving the problems that the existing natural fire monitoring device is difficult to monitor the distribution state of temperature according to the fiber grating sensor, and further the fire extinguishing device is controlled to carry out fire extinguishing operation on the temperature generated in different areas, so that the fire extinguishing device generates certain waste, and the high-efficiency fire extinguishing effect is difficult to achieve.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses a coal mine natural fire monitoring device based on a fiber bragg grating sensor, which comprises a water spraying cooling device arranged in a roadway; the water spraying cooling device 2 comprises a water guide pipe, a high-pressure water pump, a water storage wall, a water spraying convex strip, an elastic sealing ball, an elastic extrusion pipe and a fixed through pipe; the water guide pipes are arranged on two sides of the bottom end of the roadway, the end parts of the water guide pipes are connected with a high-pressure water pump, and the model of the high-pressure water pump is QDL 45-20; the water storage walls are uniformly laid on the inner wall of the roadway, and water storage cavities are formed in the water storage walls; the bottom end of the water storage wall is communicated with the water guide pipe, and the top end of the water storage wall is connected to the fixed through pipe; the outer wall of the water storage wall is uniformly provided with water spraying convex strips from top to bottom, the side walls of the water spraying convex strips are obliquely and downwards provided with water spraying holes, and the water spraying convex strips are communicated with the water storage cavity; an elastic sealing ball is arranged in the water storage cavity, is arranged in the water spraying raised line in a sliding manner, is connected to the side wall of the fixed through pipe through an elastic extrusion pipe, and is provided with an exhaust pipe above the fixed through pipe; a plurality of fiber grating sensors are laid at the bottom end of the roadway, the end parts of the fiber grating sensors are electrically connected with a grating demodulator, and the type of the grating demodulator is WI 3210B; the grating demodulator 4 is electrically connected with a control terminal, and the control terminal is a computer; an alarm is mounted on the side wall of the roadway, and the type of the alarm is DWJ-10; the high-pressure water pump and the alarm are electrically connected with a control terminal; when the device works, the fiber bragg grating sensors are respectively arranged in each detection area to be detected, detection signals are transmitted to the grating demodulator through the transmission optical fibers, the grating demodulator can demodulate reflection wavelengths of the fiber bragg gratings according to different wavelengths so as to calculate temperature measurement results of each detection area, if the detected temperature is higher than a preset value or the temperature change rate exceeds a preset threshold value, the grating demodulator can send alarm signals to the alarm and transmit temperature signals to the control terminal, the control terminal controls the high-pressure water pump to start according to the obtained alarm signals, then the high-pressure water pump inputs external water sources into the water storage cavity through the water guide pipe, water is stored in the water storage cavity along with the high-pressure water pump, and then the elastic sealing ball arranged in the water spraying convex strip in a sliding mode is separated from the water spraying convex strip under the impact force of high-pressure water flow, the high-pressure water entering the water storage cavity is sprayed out through the water spraying holes formed in the water spraying convex strips, and then water sprayed out through the water spraying convex strips can generate a water curtain in the roadway, so that the temperature reduction and fire extinguishing operation is performed in the roadway; through the matching of the plurality of water spraying convex strips and the elastic sealing balls, the pressure of water spraying of the high-pressure water pump can be controlled through the control terminal according to the temperature detected by the fiber bragg grating sensor, so that the elastic sealing balls can slide upwards under the impact force of water pressure, and the area of a water curtain generated by water flow sprayed by the water spraying convex strips is increased; through the fiber grating sensor that sets up in the tunnel, and then can monitor the temperature of different regions in the tunnel, can control high pressure water pump's water spray pressure through control terminal, and then can adjust the area of water spray sand grip blowout water curtain in the tunnel, and then can the tunnel in the temperature or the high temperature that the conflagration breaing out produced handle of putting out a fire of cooling down.
Preferably, the elastic extrusion tube is made of a corrugated elastic material, a sodium bicarbonate solution is filled in the elastic extrusion tube, and the liquid level height of the sodium bicarbonate solution is less than half of the length of the elastic extrusion tube; a reaction cavity is formed in the fixed through pipe and communicated with the elastic extrusion pipe; the reaction cavity is filled with an aluminum sulfate solution, the bottom end of the reaction cavity is provided with a spray hole, and a hydrophobic gas guide plate is arranged in the reaction cavity; when the impact force of the elastic sealing ball in high-pressure water flow slides upwards in the water storage cavity, the elastic extrusion pipe is compressed in the water storage cavity, and the maximum deformation of the compressed elastic extrusion pipe does not influence the water spraying operation of the water spraying convex strips; after the elastic extrusion pipe is compressed, the elastic extrusion pipe is filled with an elastic sodium hydrogen solution and enters the reaction cavity, and then the elastic extrusion pipe is mixed with an aluminum sulfate solution placed in the reaction cavity to generate a chemical reaction, so that part of carbon dioxide is generated in the reaction cavity, and the generated carbon dioxide is sprayed into a roadway through the spray holes, and then the roadway is subjected to fire extinguishing operation; the liquid level height of the sodium bicarbonate solution is smaller than half of the length of the elastic extrusion pipe, so that the amount of the sodium bicarbonate solution entering the reaction cavity is controlled according to the water flow pressure sprayed by the high-pressure water pump, and the spraying amount of carbon dioxide is controlled.
Preferably, a deformation cavity is formed in the elastic sealing ball, and the thickness of the top wall of the deformation cavity is smaller than that of the end wall; the bottom end of the elastic extrusion pipe is communicated with the deformation cavity through an air guide groove, and a sliding sealing block is arranged in the elastic extrusion pipe in a sliding manner; when the water spray device works, the thickness of the top wall of the arranged deformation cavity is smaller than that of the end wall, so that the elastic sealing ball can deform quickly under the impact force of water flow, and can slide out of the water spray convex strips quickly; the sealed piece that slides that sets up can upwards slide under the promotion of deforming cavity intracavity gas, and then makes the sodium bicarbonate solution that elastic extrusion pipe bottom subside produce the phenomenon of stirring under the promotion of sealed piece that slides, and then prevents that elastic sodium bicarbonate solution from producing the phenomenon of subsiding in elastic extrusion pipe.
Preferably, the inner wall of the hydrophobic air guide plate is provided with an expansion cavity, and the outer wall of the expansion cavity is provided with a liquid guide hole; the bottom end wall of the drainage air guide plate is provided with a sliding tube, the bottom end of the sliding tube is provided with an extrusion sealing ball, and the extrusion sealing ball is filled with a foaming agent; the bottom end wall of the extrusion sealing ball is provided with an expansion hole, and the extrusion sealing ball is positioned in the spray hole; when the device works, when the mixed solution continuously reacts in the reaction cavity to generate carbon dioxide, the air pressure in the reaction cavity can be continuously increased, and then the extrusion sealing ball arranged at the bottom end of the hydrophobic air guide plate is pushed to slide downwards to be separated from the spray hole, so that the generated carbon dioxide can be sprayed out in a high-pressure state; meanwhile, the solution generated after reaction enters the sliding pipe through the liquid guide hole and is mixed with the foaming agent filled in the extrusion expansion ball, so that the mixed solution can generate a large amount of foam under the action of the foaming agent and is sprayed out through the expansion hole, and the fire extinguishing effect of the foam generated by the liquid after mixed reaction in the reaction cavity under the action of the foaming agent is further improved.
Preferably, an elastic arc plate is arranged in the fixed through pipe, a placing cavity is formed in the elastic arc plate, and a foaming agent is filled in the placing cavity; a liquid spraying hole is formed in the bottom end wall of the placing cavity, a sealing ball column is arranged on the upper end wall of the placing cavity, and the sealing ball column is arranged in the liquid spraying hole in a sliding mode; the during operation, when the continuous rising of reaction intracavity atmospheric pressure, can extrude the elasticity arc board, and then make the ascending arch that produces of elasticity arc board diapire, and then make sealed ball post roll-off hydrojet hole, the foamer of placing the intracavity packing can spout into the reaction intracavity, and then the liquid after making the mixture of reaction intracavity produces certain foam, and then the efficiency that the increase reaction intracavity foam produced, further improves the effect that the foam was put out a fire.
Preferably, the fixed through pipe is communicated with the exhaust pipe through a pipe air guide pipe, a control valve is arranged in the air guide pipe, the model of the control valve is UQ621F, and the control valve is electrically connected with a control terminal; the upper end wall of the elastic arc plate is connected to the inner wall of the fixed through pipe through an extrusion spring, and the extrusion spring is positioned at the pipe orifice of the air guide pipe; when the device works, when a chemical reaction is generated in the reaction cavity, the control terminal controls the control valve to be opened, so that gas in the exhaust pipe enters the upper part of the elastic arc plate, the upper surface of the elastic arc plate is sunken downwards, the speed of the sealing ball column sliding out of the liquid spraying hole is accelerated, meanwhile, the placing cavity can be extruded, so that a foaming agent in the placing cavity can be quickly sprayed out, and the foaming effect of the foaming agent is further improved; along with the continuous extrusion deformation of elasticity arc board under gaseous effect, and then make the elasticity arc board can be with the foam extinguishing agent of the production in the reaction chamber spout into the tunnel fast in, and then increase the efficiency of putting out a fire in tunnel.
The invention has the following beneficial effects:
1. according to the invention, the fiber bragg grating sensor is arranged in the roadway, the grating demodulator can demodulate the reflection wavelength of the fiber bragg grating according to the difference of the wavelength, so that the temperature measurement result of each detection area can be calculated, if the detected temperature is higher than a preset value or the temperature change rate exceeds a preset threshold value, the grating demodulator can send an alarm signal to a fire alarm and transmit a temperature signal to the control terminal, the control terminal can control the water spraying pressure of the high-pressure water pump, the area of a water curtain sprayed by the water spraying convex strips in the roadway can be adjusted, the use amount of a water source can be reduced, and the temperature in the roadway or the high temperature generated by fire can be cooled and put out a fire.
2. According to the invention, when the impact force of the elastic sealing ball on high-pressure water flow slides upwards in the water storage cavity, the elastic extrusion pipe is compressed in the water storage cavity, and the maximum deformation of the compressed elastic extrusion pipe does not influence the water spraying operation of the water spraying convex strips; after the elastic extrusion pipe is compressed, the inner packing of the elastic extrusion pipe can enter the reaction cavity in the elastic sodium hydrogen solution, and then the aluminum sulfate solution placed in the reaction cavity is mixed to generate a chemical reaction, so that a part of carbon dioxide is generated in the reaction cavity, and the generated carbon dioxide can be sprayed into the roadway through the spray holes, and then the fire extinguishing operation is carried out on the roadway.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 in accordance with the present invention;
in the figure: the device comprises a roadway 1, a water spray cooling device 2, a water guide pipe 21, a high-pressure water pump 22, a water storage wall 23, a water storage cavity 231, a water spray convex strip 24, a water spray hole 241, an elastic sealing ball 25, a deformation cavity 251, an elastic extrusion pipe 26, a sliding sealing block 261, a fixed through pipe 27, a reaction cavity 271, a spray hole 272, an exhaust pipe 28, a fiber grating sensor 3, a grating demodulator 4, a hydrophobic air guide plate 5, an expansion cavity 51, a liquid guide hole 52, a sliding pipe 53, an extrusion sealing ball 54, an elastic arc plate 6, a placing cavity 61, a sealing ball column 62, an air guide pipe 7 and a control valve 8.
Detailed Description
A coal mine natural fire monitoring device based on a fiber grating sensor according to an embodiment of the present invention will be described below with reference to fig. 1 to 3.
As shown in fig. 1, 2 and 3, the coal mine natural fire monitoring device based on the fiber grating sensor comprises a water spray cooling device 2 arranged in a roadway 1; the water spraying and cooling device 2 comprises a water guide pipe 21, a high-pressure water pump 22, a water storage wall 23, a water spraying convex strip 24, an elastic sealing ball 25, an elastic extrusion pipe 26 and a fixed through pipe 27; the water guide pipes 21 are arranged on two sides of the bottom end of the roadway 1, the end parts of the water guide pipes 21 are connected with the high-pressure water pump 22, and the model of the high-pressure water pump 22 is QDL 45-20; the water storage walls 23 are uniformly laid on the inner wall of the roadway 1, and water storage cavities 231 are formed in the water storage walls 23; the bottom end of the water storage wall 23 is communicated with the water guide pipe 21, and the top end of the water storage wall 23 is connected to the fixed through pipe 27; the outer wall of the water storage wall 23 is uniformly provided with water spraying convex strips 24 from top to bottom, the side walls of the water spraying convex strips 24 are obliquely and downwards provided with water spraying holes 241, and the water spraying convex strips 24 are communicated with the water storage cavity 231; an elastic sealing ball 25 is arranged in the water storage cavity 231, the elastic sealing ball 25 is arranged in the water spraying convex strip 24 in a sliding manner, the elastic sealing ball 25 is connected to the side wall of the fixed through pipe 27 through an elastic extrusion pipe 26, and an exhaust pipe 28 is arranged above the fixed through pipe 27; a plurality of fiber grating sensors 3 are laid at the bottom end of the roadway 1, the end parts of the fiber grating sensors 3 are electrically connected with a grating demodulator 4, and the type of the grating demodulator 4 is WI 3210B; the grating demodulator 4 is electrically connected with a control terminal, and the control terminal is a computer; an alarm is mounted on the side wall of the roadway 1, and the type of the alarm is DWJ-10; the high-pressure water pump 22 and the alarm are electrically connected with a control terminal; when the device works, the fiber bragg grating sensors 3 are respectively arranged in each detection area to be detected, detection signals are transmitted to the grating demodulator 4 through the transmission fiber, the grating demodulator 4 can demodulate reflection wavelengths of the fiber bragg grating according to different wavelengths so as to calculate temperature measurement results of each detection area, if the detected temperature is higher than a preset value or the temperature change rate exceeds a preset threshold value, the grating demodulator 4 sends an alarm signal to an alarm and transmits a temperature signal to the control terminal, the control terminal controls the high-pressure water pump 22 to be started according to the obtained alarm signal, then the high-pressure water pump 22 inputs an external water source into the water storage cavity 231 through the water guide pipe 21, water is continuously stored in the water storage cavity 231 along with the high-pressure water pump 22, and then the elastic sealing ball 25 arranged in the water spraying convex strip 24 in a sliding mode is separated from the water spraying convex strip 24 under the impact force of high-pressure water flow, the high-pressure water entering the water storage cavity 231 is sprayed out through the water spraying holes 241 formed in the water spraying convex strips 24, and the water sprayed out through the water spraying convex strips 24 can generate a water curtain in the roadway 1, so that the temperature reduction and fire extinguishing operation can be performed in the roadway 1; through the matching of the plurality of water spraying convex strips 24 and the elastic sealing balls 25, the pressure of water spraying of the high-pressure water pump 22 can be controlled through the control terminal according to the temperature detected by the fiber grating sensor 3, so that the elastic sealing balls 25 can slide upwards under the impact force of water pressure, and the area of a water curtain generated by water flow sprayed by the water spraying convex strips 24 is increased; through the fiber grating sensor 3 that sets up in the tunnel 1, and then can monitor the temperature of different regions in the tunnel 1, can control high pressure water pump 22's water spray pressure through control terminal, and then can adjust the area of water spray sand grip 24 blowout water curtain in tunnel 1, and then can be in tunnel 1 the temperature or the high temperature that the conflagration breaing out produced carries out the cooling and puts out a fire the processing.
As shown in fig. 2 and 3, the elastic extrusion tube 26 is made of a corrugated elastic material, and the elastic extrusion tube 26 is filled with a sodium bicarbonate solution, and the liquid level height of the sodium bicarbonate solution is less than half of the length of the elastic extrusion tube 26; a reaction cavity 271 is formed in the fixed through pipe 27, and the reaction cavity 271 is communicated with the elastic extrusion pipe 26; the reaction cavity 271 is filled with an aluminum sulfate solution, the bottom end of the reaction cavity 271 is provided with a spray hole 272, and a hydrophobic gas guide plate 5 is arranged in the reaction cavity 271; when the impact force of the high-pressure water flow slides upwards in the water storage cavity 231, the elastic extrusion pipe 26 is compressed in the water storage cavity 231, and the maximum deformation of the compressed elastic extrusion pipe 26 does not influence the water spraying operation of the water spraying convex strips 24; after the elastic extrusion pipe 26 is compressed, the elastic sodium hydrogen solution filled in the elastic extrusion pipe 26 enters the reaction cavity 271, and then is mixed with the aluminum sulfate solution placed in the reaction cavity 271 to generate a chemical reaction, so that a part of carbon dioxide is generated in the reaction cavity 271, and the generated carbon dioxide is sprayed into the roadway 1 through the spray holes 272, and then the fire extinguishing operation is performed on the roadway 1; the liquid level height of the sodium bicarbonate solution is smaller than half of the length of the elastic extrusion pipe 26, so that the amount of the sodium bicarbonate solution entering the reaction cavity 271 and the ejection amount of carbon dioxide can be controlled conveniently according to the water flow pressure ejected by the high-pressure water pump 22.
As shown in fig. 2 and 3, a deformation cavity 251 is formed inside the elastic sealing ball 25, and the thickness of the top wall of the deformation cavity 251 is smaller than that of the end wall; the bottom end of the elastic extrusion tube 26 is communicated with the deformation cavity 251 through an air guide groove, and a sliding sealing block 261 is arranged inside the elastic extrusion tube 26 in a sliding mode; when the water spray device works, the thickness of the top wall of the arranged deformation cavity 251 is smaller than that of the end wall, so that the elastic sealing ball 25 can deform quickly under the impact force of water flow, and the elastic sealing ball 25 can slide out of the water spray convex strip 24 quickly; the sliding sealing block 261 that sets up can upwards slide under the promotion of deforming cavity 251 internal gas, and then makes the sodium bicarbonate solution that elasticity extrusion pipe 26 bottom subside produce the phenomenon of stirring under the promotion of sliding sealing block 261, and then prevents that elasticity sodium bicarbonate solution from producing the phenomenon of subsiding in elasticity extrusion pipe 26.
As shown in fig. 2 and 3, an expansion cavity 51 is formed on the inner wall of the hydrophobic air guide plate 5, and a liquid guide hole 52 is formed on the outer wall of the expansion cavity 51; the bottom end wall of the hydrophobic air guide plate 5 is provided with a sliding tube 53, the bottom end of the sliding tube 53 is provided with an extrusion sealing ball 54, and the extrusion sealing ball 54 is filled with foaming agent; the bottom end wall of the extrusion sealing ball 54 is provided with an expansion hole, and the extrusion sealing ball 54 is positioned in the spray hole 272; when the device works, when the mixed solution continuously reacts in the reaction cavity 271 to generate carbon dioxide, the air pressure in the reaction cavity 271 can be continuously increased, so that the extrusion sealing ball 54 arranged at the bottom end of the hydrophobic air guide plate 5 is pushed to slide downwards to be separated from the spray hole 272, and the generated carbon dioxide can be sprayed out in a high-pressure state; meanwhile, the solution generated after the reaction enters the sliding pipe 53 through the liquid guide hole 52 and is mixed with the foaming agent filled in the extrusion expansion ball, so that the mixed solution can generate a large amount of foam under the action of the foaming agent and is sprayed out through the expansion hole, and the fire extinguishing effect of the foam generated by the liquid after the mixed reaction in the reaction cavity 271 under the action of the foaming agent is further improved.
As shown in fig. 2 and 3, an elastic arc plate 6 is arranged inside the fixed through pipe 27, a placing cavity 61 is formed in the elastic arc plate 6, and a foaming agent is filled in the placing cavity 61; a liquid spraying hole is formed in the bottom end wall of the placing cavity 61, a sealing ball column 62 is arranged on the upper end wall of the placing cavity 61, and the sealing ball column 62 is arranged in the liquid spraying hole in a sliding mode; the during operation, when the continuous rising of reaction chamber 271 internal gas pressure, can extrude elasticity arc 6, and then make the 6 diapalls of elasticity arc produce the arch upwards, and then make sealed bulb 62 roll-off hydrojet hole, place the foamer of chamber 61 intussuseption and can spout into reaction chamber 271 in, and then make the liquid after the mixture in the reaction chamber 271 produce certain foam, and then the efficiency that the foam produced in the increase reaction chamber 271, further improve the effect that the foam was put out a fire.
As shown in fig. 2 and fig. 3, the fixed through pipe 27 is communicated with the exhaust pipe 28 through a pipe air duct 7, a control valve 8 is arranged in the air duct 7, the model of the control valve 8 is UQ621F, and the control valve 8 is electrically connected with a control terminal; the upper end wall of the elastic arc plate 6 is connected to the inner wall of the fixed through pipe 27 through an extrusion spring, and the extrusion spring is positioned at the pipe orifice of the air guide pipe 7; when the device works, when a chemical reaction is generated in the reaction cavity 271, the control terminal controls the control valve 8 to be opened, so that the gas in the exhaust pipe 28 enters the upper part of the elastic arc plate 6, the upper surface of the elastic arc plate 6 is downwards sunken, the speed of sliding the sealed ball column 62 out of the liquid spraying hole is accelerated, meanwhile, the placing cavity 61 can be extruded, so that the foaming agent in the placing cavity 61 can be quickly sprayed out, and the foaming effect of the foaming agent is further increased; along with the continuous extrusion deformation of elastic arc plate 6 under gaseous effect, and then make elastic arc plate 6 can be fast spout into tunnel 1 with the foam extinguishing agent of the production in the reaction chamber 271, and then increase tunnel 1's the efficiency of putting out a fire.
The specific working process is as follows:
when the device works, the fiber bragg grating sensors 3 are respectively arranged in each detection area to be detected, detection signals are transmitted to the grating demodulator 4 through the transmission fiber, the grating demodulator 4 can demodulate reflection wavelengths of the fiber bragg grating according to different wavelengths so as to calculate temperature measurement results of each detection area, if the detected temperature is higher than a preset value or the temperature change rate exceeds a preset threshold value, the grating demodulator 4 sends an alarm signal to an alarm and transmits a temperature signal to the control terminal, the control terminal controls the high-pressure water pump 22 to be started according to the obtained alarm signal, then the high-pressure water pump 22 inputs an external water source into the water storage cavity 231 through the water guide pipe 21, water is continuously stored in the water storage cavity 231 along with the high-pressure water pump 22, and then the elastic sealing ball 25 arranged in the water spraying convex strip 24 in a sliding mode is separated from the water spraying convex strip 24 under the impact force of high-pressure water flow, the high-pressure water entering the water storage cavity 231 is sprayed out through the water spraying holes 241 formed in the water spraying protruding strips 24, and then the water sprayed out through the water spraying protruding strips 24 can generate a water curtain in the roadway 1, so that the temperature reduction and fire extinguishing operation can be performed in the roadway 1.
In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in 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 therefore, should not be taken as limiting the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. The utility model provides a colliery nature fire monitoring devices based on fiber grating sensor which characterized in that: comprises a water spray cooling device (2) arranged in a roadway (1); the water spraying and cooling device (2) comprises a water guide pipe (21), a high-pressure water pump (22), a water storage wall (23), a water spraying convex strip (24), an elastic sealing ball (25), an elastic extrusion pipe (26) and a fixed through pipe (27); the water guide pipes (21) are arranged on two sides of the bottom end of the roadway (1), the end parts of the water guide pipes (21) are connected with a high-pressure water pump (22), and the type of the high-pressure water pump (22) is QDL 45-20; the water storage walls (23) are uniformly laid on the inner wall of the roadway (1), and water storage cavities (231) are formed in the water storage walls (23); the bottom end of the water storage wall (23) is communicated with the water guide pipe (21), and the top end of the water storage wall (23) is connected to the fixed through pipe (27); the outer wall of the water storage wall (23) is uniformly provided with water spraying convex strips (24) from top to bottom, the side walls of the water spraying convex strips (24) are provided with water spraying holes (241) in an upward and downward inclined mode, and the water spraying convex strips (24) are communicated with the water storage cavity (231); an elastic sealing ball (25) is arranged in the water storage cavity (231), the elastic sealing ball (25) is arranged in the water spraying convex strip (24) in a sliding mode, the elastic sealing ball (25) is connected to the side wall of the fixed through pipe (27) through an elastic extrusion pipe (26), and an exhaust pipe (28) is arranged above the fixed through pipe (27); a plurality of fiber grating sensors (3) are laid at the bottom end of the roadway (1), a grating demodulator (4) is electrically connected to the end part of each fiber grating sensor (3), and the type of each grating demodulator (4) is WI 3210B; the grating demodulator (4) is electrically connected with the control terminal, and the control terminal is a computer; an alarm is mounted on the side wall of the roadway (1), and the type of the alarm is DWJ-10; the high-pressure water pump (22) and the alarm are electrically connected with a control terminal.
2. The coal mine natural fire monitoring device based on the fiber grating sensor as claimed in claim 1, wherein: the elastic extrusion pipe (26) is made of a corrugated elastic material, sodium bicarbonate solution is filled in the elastic extrusion pipe (26), and the liquid level height of the sodium bicarbonate solution is less than half of the length of the elastic extrusion pipe (26); a reaction cavity (271) is formed in the fixed through pipe (27), and the reaction cavity (271) is communicated with the elastic extrusion pipe (26); the reaction cavity (271) is filled with an aluminum sulfate solution, the bottom end of the reaction cavity (271) is provided with a spray hole (272), and a hydrophobic air guide plate (5) is arranged in the reaction cavity (271).
3. The coal mine natural fire monitoring device based on the fiber grating sensor as claimed in claim 1, wherein: a deformation cavity (251) is formed in the elastic sealing ball (25), and the thickness of the top wall of the deformation cavity (251) is smaller than that of the end wall; the bottom end of the elastic extrusion pipe (26) is communicated with the deformation cavity (251) through an air guide groove, and a sliding sealing block (261) is arranged inside the elastic extrusion pipe (26) in a sliding mode.
4. The coal mine natural fire monitoring device based on the fiber grating sensor as claimed in claim 2, wherein: an expansion cavity (51) is formed in the inner wall of the hydrophobic air guide plate (5), and a liquid guide hole (52) is formed in the outer wall of the expansion cavity (51); the wall of the bottom end of the hydrophobic air guide plate (5) is provided with a sliding tube (53), the bottom end of the sliding tube (53) is provided with an extrusion sealing ball (54), and the extrusion sealing ball (54) is filled with foaming agent; the bottom end wall of the extrusion sealing ball (54) is provided with an expansion hole, and the extrusion sealing ball (54) is positioned in the spray hole (272).
5. The coal mine natural fire monitoring device based on the fiber grating sensor as claimed in claim 2, wherein: an elastic arc plate (6) is arranged in the fixed through pipe (27), a placing cavity (61) is formed in the elastic arc plate (6), and a foaming agent is filled in the placing cavity (61); liquid spraying holes are formed in the bottom end wall of the placing cavity (61), a sealing ball column (62) is arranged on the upper end wall of the placing cavity (61), and the sealing ball column (62) is arranged in the liquid spraying holes in a sliding mode.
6. The coal mine natural fire monitoring device based on the fiber grating sensor as claimed in claim 5, wherein: the fixed through pipe (27) is communicated with the exhaust pipe (28) through an air duct (7), a control valve (8) is arranged in the air duct (7), the model of the control valve (8) is UQ621F, and the control valve (8) is electrically connected with a control terminal; the upper end wall of the elastic arc plate (6) is connected to the inner wall of the fixed through pipe (27) through an extrusion spring, and the extrusion spring is positioned at the pipe orifice of the air guide pipe (7).
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| CN111322104B (en) * | 2020-02-26 | 2021-08-06 | 河南理工大学 | Intelligent fire extinguishing device for underground roadway |
| CN111335935B (en) * | 2020-02-28 | 2021-07-20 | 杭州启护信息科技有限公司 | Fire extinguishing device for underground coal mine |
| CN111608733A (en) * | 2020-07-13 | 2020-09-01 | 临沂矿业集团有限责任公司 | Unattended safety early warning system for underground coal mine drainage system |
| CN112150746B (en) * | 2020-09-29 | 2022-03-15 | 福州大学 | Self-explosion monitoring and early warning device and method for vulcanized mine explosive |
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| KR100312850B1 (en) * | 1998-03-18 | 2001-12-28 | 이정국 | Automatic water spraying apparatus for tunnel concrete curing and control method thereof |
| DE10209871B4 (en) * | 2002-03-06 | 2007-08-09 | Kretzschmar, Axel, Dr.Rer.Nat.Habil. | Method and arrangement for reducing the smoke and pollutant load |
| KR20040096819A (en) * | 2004-08-31 | 2004-11-17 | 풍림산업 주식회사 | Dust removal device |
| PL68874Y1 (en) * | 2011-12-12 | 2017-01-31 | Inst Techniki Górniczej Komag | Sprinkling curtain for dust flocculation in the mining headings |
| CN103852111A (en) * | 2014-03-03 | 2014-06-11 | 天津大学 | Intelligent tunnel monitoring and alarm system based on optical fiber sensing network |
| CN104329109A (en) * | 2014-08-29 | 2015-02-04 | 辽宁工程技术大学 | Gob retardant efficient spraying system and spraying method |
| CN205532689U (en) * | 2016-01-29 | 2016-08-31 | 冉茂伦 | Tunnel face automatic remote control sprays dust fall fire extinguishing systems |
| CN106523022B (en) * | 2016-12-27 | 2019-06-11 | 同济大学 | Tunnel fire extinguishing system based on water curtain shielding action |
| CN207261036U (en) * | 2017-08-10 | 2018-04-20 | 卜海明 | A kind of fire-fighting water-saving structure for freeway tunnel |
| CN207740048U (en) * | 2017-12-06 | 2018-08-17 | 河南大有能源股份有限公司耿村煤矿 | A kind of easy spontaneous combustion mine sealing pressure difference on-line monitoring device of high methane |
| CN108222999A (en) * | 2018-01-26 | 2018-06-29 | 宁夏德大气体开发科技有限公司 | A kind of liquid carbon dioxide cooling fire extinguishing system |
| CN109060168A (en) * | 2018-08-15 | 2018-12-21 | 谢国民 | A kind of spontaneous fire in coal mine monitoring device based on fiber-optic grating sensor |
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Address after: 234000 north section of Longxing Road, circular economy demonstration park, Yongqiao District, Suzhou City, Anhui Province Patentee after: Anhui Jinding Safety Technology Co.,Ltd. Address before: 234000 north section of Longxing Road, circular economy demonstration park, Yongqiao District, Suzhou City, Anhui Province Patentee before: SUZHOU JINDING TECHNOLOGY SECURITY Co.,Ltd. |