CN110145355B - Fire smoke flow drainage device and method for belt conveyor - Google Patents
Fire smoke flow drainage device and method for belt conveyor Download PDFInfo
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- CN110145355B CN110145355B CN201910513918.9A CN201910513918A CN110145355B CN 110145355 B CN110145355 B CN 110145355B CN 201910513918 A CN201910513918 A CN 201910513918A CN 110145355 B CN110145355 B CN 110145355B
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- 239000000779 smoke Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005065 mining Methods 0.000 claims description 24
- 230000002457 bidirectional effect Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 22
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 15
- 239000003063 flame retardant Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 210000002268 wool Anatomy 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002241 glass-ceramic Substances 0.000 claims description 3
- 229910001095 light aluminium alloy Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
Classifications
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
- E21F1/12—Devices for automatically opening air doors
-
- 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
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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)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
In order to solve the problem that smoke flow generated when the rubber belt conveyor breaks out a fire disaster in the prior art enters each working face, the invention provides the device and the method for guiding the smoke flow of the fire disaster of the rubber belt conveyor.
Description
Technical Field
The invention belongs to the technical field of coal mine fire prevention and control, and particularly relates to a fire smoke flow drainage device and method for a belt conveyor.
Background
The head and tail of the rubber belt conveyor are easy to generate fire due to friction, a large amount of toxic and harmful gases such as HCL, hydrocyanic acid, unsaturated hydrocarbon, CO and the like can be generated in the combustion process of the rubber belt, and if the rubber belt in the air inflow is out of time or improper in method after the fire disaster occurs, the toxic smoke flows into each working surface rapidly, so that the disaster is enlarged. At present, no timely and effective treatment method for the fire of the adhesive tape exists, and only the fire position can be extinguished manually, but a large amount of toxic and harmful gas still can be generated in the extinguishing process and flows into each working surface along the roadway, so that a device and a method capable of effectively guiding toxic and harmful smoke flow when the adhesive tape conveyor breaks out of the fire are urgently needed.
Disclosure of Invention
In order to solve the problem that smoke flow generated when the rubber belt conveyor breaks out a fire disaster in the prior art enters each working face, the invention provides the device and the method for guiding the smoke flow of the fire disaster of the rubber belt conveyor.
A fire smoke flow drainage device of a belt conveyor comprises a first smoke sensor, a first CO sensor, a second smoke sensor, a second CO sensor, a bidirectional anemometer, a control cabinet and an adjusting air window; the first smoke sensor, the first CO sensor, the second smoke sensor, the second CO sensor and the bidirectional anemometer are arranged in a roadway of the belt conveyor; the first smoke sensor and the first CO sensor are arranged in parallel in the downwind direction of the normal wind direction of the bidirectional anemometer, and the second smoke sensor and the second CO sensor are arranged in parallel in the upwind direction of the normal wind direction of the bidirectional anemometer; the control cabinet and the adjusting air window are arranged in the return air roadway; the first smoke sensor, the first CO sensor, the second smoke sensor, the second CO sensor and the bidirectional anemometer are all connected with the control cabinet, and the control cabinet performs opening and closing adjustment control on the adjustment wind window according to sensor signals.
Further, the second smoke sensor and the second CO sensor are arranged in the rubber belt conveyor tunnel corresponding to the inlet of the return air tunnel; or the second smoke sensor and the second CO sensor are arranged at the upwind position of the normal wind direction of the inlet of the return air tunnel in the tunnel of the belt conveyor.
Further, the control cabinet is a PLC control cabinet, and the PLC control cabinet is arranged on the side wall of the return air roadway.
Further, the PLC control cabinet further comprises a mining flameproof intrinsic safety type PLC controller, a mining intrinsic safety type radio frequency module, a sensor acquisition module, a CAN bus module, a mining intrinsic safety type transformer, a mining flameproof control button, an explosion-proof electromagnetic valve, an explosion-proof motor, a mining intrinsic safety uninterrupted direct current power supply, a mining intrinsic safety type network switch and a monitoring host.
Further, the adjusting air window is arranged on the air door wall of the return air roadway and comprises a first adjusting air window and a second adjusting air window which are arranged at a certain distance along the trend of the return air roadway.
Further, the adjusting wind window comprises a motor, a speed reducer, a transmission shaft, a scroll, a sheath, a tail plug, a guide device, an end cover plate, a housing, a fixing bolt, a guide rail, a wool top, an upper limit switch, a curtain sheet, a sealing rubber strip, a bottom beam sealing strip and a lower limit switch; the end part of the motor and the end cover plate are respectively fixed on two sides of the air door wall, the motor is connected with the transmission shaft through the speed reducer, the transmission shaft is fixedly sleeved with a scroll, the other end of the scroll is connected with the guide device on the end cover plate through the tail plug, and the scroll is provided with a sheath at intervals; the motor, the speed reducer, the transmission shaft and the outer side of the scroll are provided with a housing; guide rails are respectively arranged on two sides of the air door wall through fixing bolts, and wool tops are arranged on the outer edges of the inner sides of the guide rails; the lower side of the scroll is connected with the curtain sheet through an upper limit switch, the curtain sheet at the lowest side is connected with a bottom beam, a bottom beam sealing strip is arranged on the bottom beam, and a lower limit switch is arranged at the lower part of the bottom beam; two ends of the curtain sheet extend into the guide rail through the end clamps, heat insulation materials are arranged in the curtain sheet, and sealing strips are arranged between adjacent curtain sheets.
Further, the curtain sheets are made of double-layer buckle plate light aluminum alloy materials, the heat insulation materials are glass fibers and ceramic fibers, and the sealing strips between the curtain sheets are flame-retardant rubber sealing strips; the guide rail is a buried guide rail, and the wool tops are made of flame-retardant rubber; the surface of the roller shutter of the adjusting wind window is covered with a layer of glass fiber cloth coated with flame retardant rubber, and the adjusting wind window is applicable to roadways with the pressure difference at two ends of more than 400 Pa.
A fire smoke flow drainage method of a rubber belt conveyor, which comprises the following steps,
The smoke and CO concentration in the wind flow in the tunnel is monitored in real time through a second smoke sensor and a second CO sensor which are arranged in the tunnel of the rubber belt conveyor, a signal is sent out through a PLC control cabinet after the rubber belt is judged to be in fire disaster, and a motor in the return air tunnel is automatically started to open and adjust a wind window;
when the bidirectional anemometer generates reverse wind flow and the smoke and CO concentrations monitored by the first smoke sensor and the first CO sensor are below safe concentrations, stopping the operation of the motor, and ensuring that the smoke-containing flow is directly led into a return roadway;
When the second smoke sensor and the second CO sensor monitor that the smoke and CO concentration in the air flow in the tunnel of the belt conveyor reach the safe concentration, the PLC control cabinet sends out a signal to control the motor to rotate reversely, and the air window is closed and adjusted.
Further, the safe concentration threshold values of the smoke and CO concentration are 30ppm and 5% obs/m, and when the second smoke sensor monitors that the smoke concentration in the roadway is more than 30ppm or the second CO sensor monitors that the CO concentration in the roadway is more than 5% obs/m, the PLC control cabinet controls and adjusts the air window to realize linear opening.
Further, the mining intrinsic safety uninterrupted direct current power supply provides electric energy for all parts of the PLC control cabinet; the mining intrinsic safety type transformer provides electric energy for a motor, a smoke sensor, a CO sensor and a bidirectional anemometer.
The beneficial effects are that:
According to the fire smoke flow drainage device and method for the rubber belt conveyor, after a fire disaster occurs in a roadway of the rubber belt conveyor, the motor is automatically started and stopped, so that the flow guiding of the fire smoke flow is adjusted according to requirements, the spreading range of the fire smoke can be reduced, the health of production personnel in other areas in the pit is guaranteed to the greatest extent, and the disaster resistance of a mine is improved.
The invention adopts a double-sensor mode, and improves the reliability of fire source occurrence judgment and detection. At present, if a fire alarm occurs underground, an air return tunnel damper is required to be opened and closed on site manually, so that the risk is increased, the personal safety of site personnel is difficult to be ensured, and the automatic executing mechanism is adopted by the fire smoke flow drainage device and method of the adhesive tape conveyor, so that intelligent air control is realized, the influence on the air supply quantity of other areas of a mine is reduced, and the safety is ensured.
The invention adopts external power supply and battery power supply, and if a fire alarm suddenly fails, the external power supply is automatically switched to a battery power supply state, thereby ensuring air quantity adjustment and avoiding secondary risk. The invention can be externally provided with the mobile phone terminal to realize real-time monitoring, and the fault automatically sends alarm information to the mobile phone terminal, thereby being convenient for timely system maintenance, and timely reminding relevant management personnel to make decisions if a fire alarm occurs.
The invention adopts the structure of the adjusting wind window to solve the automatic ventilation adjustment problem of large wind pressure and large humidity on site, the curtain sheet adopts the aluminum alloy material of the light double-layer buckle plates, the flame-retardant rubber sealing strips are added between the buckle plates, the embedded guide rail is additionally provided with the flame-retardant rubber seal, the surface of the rolling curtain of the adjusting wind window is covered with a layer of glass fiber cloth coated with the flame-retardant rubber, the air leakage quantity and the weight of the whole plate surface are reduced, and the rolling curtain has the effects of wind pressure resistance, corrosion resistance, high temperature resistance and flame retardance.
Drawings
FIG. 1 is a schematic diagram of the operation of the fire smoke flow diversion device of the belt conveyor of the present invention;
FIG. 2 is an assembly schematic diagram of a PLC control cabinet of the present invention;
FIG. 3 is a schematic view of the structure of the air window according to the present invention
In the figure: 1. a first smoke sensor; 2. a first CO sensor; 3. a second smoke sensor; 4. a second CO sensor; 5. a bi-directional anemometer; 6. a control cabinet; 7. a first adjustment window; 8. a second adjusting louver; 9. a motor; 10. a speed reducer; 11. a transmission shaft; 12. a reel; 13. a sheath; 14. a tail plug; 15. a guide device; 16. an end cover plate; 17. a housing; 18. a fixing bolt; 19. a guide rail; 20. a wool top; 21. an upper limit switch; 22. a curtain sheet; 23. a sealing rubber strip; 24. a bottom beam; 25. a bottom beam sealing strip; 26. a lower limit switch; 27. rubber belt conveyor tunnel; 28. a return air tunnel;
Detailed Description
In order to solve the problem that smoke flow generated when the rubber belt conveyor breaks out a fire disaster in the prior art enters each working face, the invention provides the device and the method for guiding the smoke flow of the fire disaster of the rubber belt conveyor. 1-3, the invention relates to a fire smoke flow drainage device and a fire smoke flow drainage method for a belt conveyor.
The fire smoke flow drainage device of the belt conveyor comprises a first smoke sensor 1, a first CO sensor 2, a second smoke sensor 3, a second CO sensor 4, a bidirectional anemometer 5, a control cabinet 6 and an adjusting air window; the first smoke sensor 1, the first CO sensor 2, the second smoke sensor 3, the second CO sensor 4 and the bidirectional anemometer 5 are arranged in a roadway 27 of the belt conveyor; the first smoke sensor 1 and the first CO sensor 2 are arranged in parallel in the downwind direction of the normal wind direction of the bidirectional anemometer 5, and the second smoke sensor 3 and the second CO sensor 4 are arranged in parallel in the upwind direction of the normal wind direction of the bidirectional anemometer 5; the control cabinet 6 and the adjusting wind window are arranged in the return air roadway 28; the first smoke sensor 1, the first CO sensor 2, the second smoke sensor 3, the second CO sensor 4 and the bidirectional anemometer 5 are all connected with the control cabinet 6, and the control cabinet 6 performs opening and closing adjustment control on the adjustment wind window according to sensor signals.
In one or more embodiments, the second smoke sensor 3 and the second CO sensor 4 are disposed within a tape conveyor tunnel 27 corresponding to the entrance of the return air tunnel 28; or the second smoke sensor 3 and the second CO sensor 4 are arranged in the belt conveyor tunnel 2 at the upwind direction of the normal wind direction of the inlet of the return tunnel 28.
In one or more embodiments, the control cabinet 6 is a PLC control cabinet disposed on the side wall of the return air tunnel 28.
In one or more embodiments, the PLC control cabinet further includes a mining flameproof intrinsically safe PLC controller, a mining intrinsically safe radio frequency module, a sensor acquisition module, a CAN bus module, a mining intrinsically safe transformer, a mining flameproof control button, an flameproof solenoid valve, an flameproof motor, a mining intrinsically safe uninterruptible dc power supply, a mining intrinsically safe network switch, and a monitoring host.
In one or more embodiments, the damper is mounted to the damper wall of the return air tunnel 28, and the damper includes a first damper 7 and a second damper 8 disposed at spaced intervals along the path of the return air tunnel 28.
In one or more embodiments, the adjusting window comprises a motor 9, a speed reducer 10, a transmission shaft 11, a reel 12, a sheath 13, a tail plug 14, a guiding device 15, an end cover plate 16, a housing 17, a fixing bolt 18, a guide rail 19, a wool top 20, an upper limit switch 21, a curtain sheet 22, a sealing rubber strip 23, a bottom beam 24, a bottom beam sealing strip 25 and a lower limit switch 26; the end part of the motor 9 and the end cover plate 16 are respectively fixed on two sides of the air door wall, the motor 9 is connected with the transmission shaft 11 through the speed reducer 10, the transmission shaft 11 is fixedly sleeved with the scroll 12, the other end of the scroll 12 is connected with the guide device 15 on the end cover plate 16 through the tail plug 14, and the scroll 12 is provided with the sheath 13 at intervals; the motor 9, the reducer 10, the transmission shaft 11 and the outer side of the scroll 12 are provided with a housing 17; guide rails 19 are respectively arranged on two sides of the air door wall through fixing bolts 18, and wool tops 20 are arranged on the outer edges of the inner sides of the guide rails 19; the lower side of the scroll 12 is connected with a curtain sheet 22 through an upper limit switch 21, the curtain sheet at the lowest side is connected with a bottom beam 24, a bottom beam sealing strip 25 is arranged on the bottom beam 24, and a lower limit switch 26 is arranged at the lower part of the bottom beam 24; the two ends of the curtain sheet 22 extend into the guide rail 19 through the end clamps, a heat insulation material is arranged in the curtain sheet 22, and a sealing strip is arranged between the adjacent curtain sheets.
In one or more embodiments, the curtain sheets 22 are made of double-layer buckle plate light aluminum alloy materials, the heat insulation materials are glass fibers and ceramic fibers, and sealing strips among the curtain sheets 22 are flame-retardant rubber sealing strips; the guide rail 19 is a buried guide rail, and the wool tops 20 are made of flame-retardant rubber; the surface of the roller shutter of the adjusting wind window is covered with a layer of glass fiber cloth coated with flame retardant rubber, and the adjusting wind window is applicable to roadways with the pressure difference at two ends of more than 400 Pa.
The fire smoke flow drainage method of the rubber belt conveyor comprises the steps of monitoring the smoke and CO concentration in the air flow in a roadway in real time through a second smoke sensor 3 and a second CO sensor 4 which are arranged in the roadway of the rubber belt conveyor, judging that the rubber belt is in fire, sending out a signal through a PLC control cabinet, and automatically starting a motor 9 in a return air roadway to open an air window; when the bidirectional anemometer 5 generates reverse wind flow and the smoke and CO concentrations monitored by the first smoke sensor 1 and the first CO sensor 2 reach below safe concentrations, stopping the operation of the motor, and ensuring that the smoke-containing flow is directly led into a return air roadway; when the second smoke sensor 3 and the second CO sensor 4 monitor that the smoke and CO concentration in the air flow in the tunnel of the belt conveyor reach the safe concentration, the PLC control cabinet sends out a signal to control the motor to rotate reversely, and the air window is closed and adjusted.
In one or more embodiments, the safe concentration thresholds of the smoke and CO concentrations are 30ppm and 5% obs/m, and when the second smoke sensor 3 detects that the smoke concentration in the roadway is greater than 30ppm or the second CO sensor 4 detects that the CO concentration in the roadway is greater than 5% obs/m, the PLC control cabinet controls the air window to be adjusted to realize linear opening.
In one or more embodiments, the mining intrinsic safety uninterruptible direct current power supply provides electric energy for each component of the PLC control cabinet; the mining intrinsic safety type transformer provides electric energy for a motor, a smoke sensor, a CO sensor and a bidirectional anemometer.
The upper limit switch in the invention avoids unexpected situations, and the lower limit switch controls the rolling shutter door to descend and stop. As shown in fig. 1, in the normal condition, the direction of wind is indicated by the normal wind direction arrow, the first and second regulation wind windows 7 and 8 are in the closed state, and the bidirectional anemometer 5 measures a negative value of the wind speed. When the wind direction is reverse to the normal direction, the bidirectional anemometer 5 measures a positive value of the wind speed.
The beneficial effects are that: according to the fire smoke flow drainage device and method for the rubber belt conveyor, after a fire disaster occurs in a roadway of the rubber belt conveyor, the motor is automatically started and stopped, so that the flow guiding of the fire smoke flow is adjusted according to requirements, the spreading range of the fire smoke can be reduced, the health of production personnel in other areas in the pit is guaranteed to the greatest extent, and the disaster resistance of a mine is improved.
The invention adopts a double-sensor mode, and improves the reliability of fire source occurrence judgment and detection. At present, if a fire alarm occurs underground, an air return tunnel damper is required to be opened and closed on site manually, so that the risk is increased, the personal safety of site personnel is difficult to be ensured, and the automatic executing mechanism is adopted by the fire smoke flow drainage device and method of the adhesive tape conveyor, so that intelligent air control is realized, the influence on the air supply quantity of other areas of a mine is reduced, and the safety is ensured.
The invention adopts external power supply and battery power supply, and if a fire alarm suddenly fails, the external power supply is automatically switched to a battery power supply state, thereby ensuring air quantity adjustment and avoiding secondary risk. The invention can be externally provided with the mobile phone terminal to realize real-time monitoring, and the fault automatically sends alarm information to the mobile phone terminal, thereby being convenient for timely system maintenance, and timely reminding relevant management personnel to make decisions if a fire alarm occurs.
The invention adopts the structure of the adjusting wind window to solve the automatic ventilation adjustment problem of large wind pressure and large humidity on site, the curtain sheet adopts the aluminum alloy material of the light double-layer buckle plates, the flame-retardant rubber sealing strips are added between the buckle plates, the embedded guide rail is additionally provided with the flame-retardant rubber seal, the surface of the rolling curtain of the adjusting wind window is covered with a layer of glass fiber cloth coated with the flame-retardant rubber, the air leakage quantity and the weight of the whole plate surface are reduced, and the rolling curtain has the effects of wind pressure resistance, corrosion resistance, high temperature resistance and flame retardance.
Claims (6)
1. The method utilizes a fire smoke flow drainage device of the rubber belt conveyor to conduct drainage, and the fire smoke flow drainage device of the rubber belt conveyor comprises a first smoke sensor (1), a first CO sensor (2), a second smoke sensor (3), a second CO sensor (4), a bidirectional anemometer (5), a control cabinet (6) and an adjusting air window; the first smoke sensor (1), the first CO sensor (2), the second smoke sensor (3), the second CO sensor (4) and the bidirectional anemometer (5) are arranged in a tunnel of the belt conveyor; the first smoke sensor (1) and the first CO sensor (2) are arranged in parallel in the downwind direction of the normal wind direction of the bidirectional anemometer (5), and the second smoke sensor (3) and the second CO sensor (4) are arranged in parallel in the upwind direction of the normal wind direction of the bidirectional anemometer (5); the control cabinet (6) and the adjusting air window are arranged in the return air tunnel; the first smoke sensor (1), the first CO sensor (2), the second smoke sensor (3), the second CO sensor (4) and the bidirectional anemometer (5) are connected with the control cabinet (6), and the control cabinet (6) performs opening and closing adjustment control on the adjustment wind window according to sensor signals; the control cabinet is a PLC control cabinet, and the PLC control cabinet is arranged on the side wall of the return air roadway; the adjusting air window is arranged on an air door wall of the return air tunnel and comprises a first adjusting air window (7) and a second adjusting air window (8) which are arranged at a certain distance along the trend of the return air tunnel; the second smoke sensor (3) and the second CO sensor (4) are arranged in the rubber belt conveyor tunnel corresponding to the inlet of the return air tunnel; or the second smoke sensor (3) and the second CO sensor (4) are arranged at the upwind direction of the normal wind direction of the inlet of the return air tunnel in the tunnel of the rubber belt conveyor;
The method includes the steps of,
The smoke and CO concentration in the wind flow in the roadway is monitored in real time through a second smoke sensor (3) and a second CO sensor (4) which are arranged in the roadway of the rubber belt conveyor, a signal is sent out through a PLC control cabinet after the rubber belt is judged to be in fire disaster, and a motor (9) in the return air roadway is automatically started to open and regulate a wind window;
When the bidirectional anemometer (5) generates reverse wind flow and the smoke and CO concentrations monitored by the first smoke sensor (1) and the first CO sensor (2) are below safe concentrations, stopping the motor to operate, and ensuring that the smoke-containing flow is directly led into a return air roadway;
When the second smoke sensor (3) and the second CO sensor (4) monitor that the smoke and CO concentration in the wind flow in the tunnel of the rubber belt conveyor reach the safe concentration, the PLC control cabinet sends a signal to control the motor to rotate reversely, and the wind window is closed and adjusted.
2. The method for guiding the smoke flow of the fire disaster of the belt conveyor according to claim 1, wherein the PLC control cabinet further comprises a mining flameproof intrinsic safety type PLC controller, a mining intrinsic safety type radio frequency module, a sensor acquisition module, a CAN bus module, a mining intrinsic safety type transformer, a mining flameproof control button, an explosion-proof electromagnetic valve, an explosion-proof motor, a mining intrinsic safety uninterrupted direct current power supply, a mining intrinsic safety type network switch and a monitoring host.
3. The fire smoke flow diversion method of the rubber belt conveyor according to claim 1, wherein the adjusting wind window comprises a motor (9), a speed reducer (10), a transmission shaft (11), a reel (12), a sheath (13), a tail plug (14), a guiding device (15), an end cover plate (16), a housing (17), a fixing bolt (18), a guide rail (19), a wool top (20), an upper limit switch (21), a curtain sheet (22), a sealing rubber strip (23), a bottom beam (24), a bottom beam sealing strip (25) and a lower limit switch (26); the end part of the motor and the end cover plate are respectively fixed on two sides of the air door wall, the motor is connected with the transmission shaft through the speed reducer, the transmission shaft is fixedly sleeved with a scroll, the other end of the scroll is connected with the guide device on the end cover plate through the tail plug, and the scroll is provided with a sheath at intervals; the motor, the speed reducer, the transmission shaft and the outer side of the scroll are provided with a housing; guide rails are respectively arranged on two sides of the air door wall through fixing bolts, and wool tops are arranged on the outer edges of the inner sides of the guide rails; the lower side of the scroll is connected with the curtain sheet through an upper limit switch, the curtain sheet at the lowest side is connected with a bottom beam, a bottom beam sealing strip is arranged on the bottom beam, and a lower limit switch is arranged at the lower part of the bottom beam; two ends of the curtain sheet extend into the guide rail through the end clamps, heat insulation materials are arranged in the curtain sheet, and sealing strips are arranged between adjacent curtain sheets.
4. The fire smoke flow drainage method of the rubber belt conveyor according to claim 3, wherein the curtain sheets are made of double-layer buckle plate light aluminum alloy materials, the heat insulation materials are glass fibers and ceramic fibers, and the sealing strips between the curtain sheets are flame-retardant rubber sealing strips; the guide rail is a buried guide rail, and the wool tops are made of flame-retardant rubber; the surface of the roller shutter of the adjusting wind window is covered with a layer of glass fiber cloth coated with flame retardant rubber, and the adjusting wind window is applicable to roadways with the pressure difference at two ends of more than 400 Pa.
5. The fire smoke flow drainage method of the belt conveyor according to claim 1, wherein the safe concentration threshold values of smoke and CO concentration are 30ppm and 5% obs/m, and when the second smoke sensor (3) monitors that the smoke concentration in the roadway is greater than 30ppm or the second CO sensor (4) monitors that the CO concentration in the roadway is greater than 5% obs/m, the PLC control cabinet controls the air window to be adjusted to realize linear opening.
6. The method for guiding the fire smoke flow of the belt conveyor according to claim 1, wherein the mining intrinsic safety uninterrupted direct current power supply provides electric energy for all parts of the PLC control cabinet; the mining intrinsic safety type transformer provides electric energy for a motor, a smoke sensor, a CO sensor and a bidirectional anemometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513918.9A CN110145355B (en) | 2019-06-14 | 2019-06-14 | Fire smoke flow drainage device and method for belt conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513918.9A CN110145355B (en) | 2019-06-14 | 2019-06-14 | Fire smoke flow drainage device and method for belt conveyor |
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| CN110145355A CN110145355A (en) | 2019-08-20 |
| CN110145355B true CN110145355B (en) | 2024-05-17 |
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| CN116678916B (en) * | 2023-08-04 | 2023-10-20 | 中国矿业大学(北京) | Forest fire spreading monitoring system and method based on fuel bed |
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