CN110101991B - Vehicle-mounted self-spraying fire extinguishing system for coal mine - Google Patents
Vehicle-mounted self-spraying fire extinguishing system for coal mine Download PDFInfo
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- CN110101991B CN110101991B CN201910265326.XA CN201910265326A CN110101991B CN 110101991 B CN110101991 B CN 110101991B CN 201910265326 A CN201910265326 A CN 201910265326A CN 110101991 B CN110101991 B CN 110101991B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0072—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using sprayed or atomised water
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Abstract
The invention belongs to the field of underground operation of coal mines and discloses a vehicle-mounted self-spraying fire extinguishing system for coal mines, which comprises a water storage tank, an air storage tank and a plurality of spray heads arranged in an engine compartment, wherein an air compressor on an explosion-proof diesel engine of a vehicle is connected with an air inlet of the air storage tank through a one-way valve, an air outlet of the air storage tank is respectively connected with air inlets of a manual fire extinguishing valve and an automatic fire extinguishing valve which are connected in parallel, the air outlets of the manual fire extinguishing valve and the automatic fire extinguishing valve are connected with three loops, the first loop is connected with an oil breaking cylinder and an air breaking cylinder of the engine, the second loop is connected with a pressurizing valve, the pressurizing valve is connected with the water storage tank, the. The fire extinguishing medium of the system is water, the gas storage tank arranged on the explosion-proof vehicle is used as a pressurized gas source, and meanwhile, no electric element is arranged, so that the system is convenient to widely popularize in underground coal mine vehicles, and has important significance for improving the running safety of the vehicles.
Description
Technical Field
The invention belongs to the field of underground operation of coal mines, and particularly relates to a vehicle-mounted self-spraying fire extinguishing system for a coal mine.
Background
In the operation process of a vehicle driven by an underground explosion-proof diesel engine of a coal mine, the surface temperature of the engine is high, in the ordinary maintenance process, oil stains (including diesel oil, engine oil, hydraulic oil and the like) are difficultly stored on the surface of the engine, in addition, when the engine runs for a long time in a roadway, a large amount of coal dust can be accumulated on the surface of the engine, if the engine runs in a short time due to water shortage, the surface temperature can be rapidly increased, an engine body can burn to red, combustible substances such as the oil stains, the dust and the like can be finally ignited to generate open fire, the ventilation volume in the underground roadway is large, the space is narrow, if the fire is not extinguished timely, the fire can be rapidly expanded and is difficult to extinguish, meanwhile, gas is also contained in underground air. Coal mine safety regulations stipulate that 8KG fire extinguishers need to be installed on underground vehicles, underground personnel can not lead to the failure of partial fire extinguishers to the maintenance of fire extinguishers, and meanwhile, in case of fire, the fire extinguishers need to be manually aligned to fire points to extinguish the fire when being used, the psychological quality requirement on fire extinguishers is high in emergency, and the fire points are not easy to accurately and effectively put out. At present, part of underground explosion-proof vehicles are provided with an explosion-proof electric control automatic dry powder/foam fire extinguishing system which has complex composition, easy misoperation, higher cost and limited fire extinguishing capability, and once the underground explosion-proof vehicles are started, the process can not be stopped after one-time spraying; and after the spraying is finished, the refilling is needed, so that the spraying is complex and the maintenance cost is high.
The existing fire extinguishing systems belong to pavement vehicle configuration, and adopt an electric control mode to perform early warning and execution. The prior documents and related patents also relate to fire prevention and extinguishing systems for coal mines in part, but are only limited to be applied to underground roadways of coal mines and cannot be used for vehicles.
Disclosure of Invention
The invention provides a vehicle-mounted self-spraying fire extinguishing system for a coal mine, aiming at solving the problem that an effective fire extinguishing system is not installed in an underground explosion-proof diesel engine driven vehicle.
The invention adopts the following technical scheme:
the utility model provides a colliery is with on-vehicle self-spraying water fire extinguishing system, including the storage water tank, gas holder and a plurality of shower nozzle of locating in the engine compartment, the air compressor on the explosion-proof diesel engine of vehicle connects the air inlet of gas holder behind the check valve, the gas outlet of gas holder is connected to the air inlet of parallelly connected manual fire valve and automatic fire valve respectively, the gas outlet of manual fire valve and automatic fire valve is connected with three return circuits, first way is connected to the disconnected hydro-cylinder and the disconnected hydro-cylinder of engine, the second way is connected the force (forcing) valve, the pressure (forcing) valve is connected the storage water tank, the gas accuse switching-over valve is connected to the third way, the gas.
Two high-temperature points (a supercharger and an air compressor) in the engine compartment are respectively provided with a temperature detector, and the temperature detectors are connected with a control port of the automatic fire extinguishing valve.
The pressurizing valve comprises a one-way valve for preventing water in the water storage tank from flowing back to the gas pipeline, a pressure gauge for displaying pressure in real time, a safety valve for limiting the maximum gas pressure in the water storage tank and a pressure reducing valve for reducing the pressurizing pressure flowing into the water storage tank from the gas storage tank, and the one-way valve, the pressure gauge, the safety valve and the pressure reducing valve are sequentially connected.
And a water drain valve is arranged at the bottom of the gas storage tank.
The structure form of manual fire extinguishing valve is for the manual area location, and after manual operation, this valve still can be fixed a position in the open mode after the hand is loosened, after the intensity of a fire extinguishes, can reset this valve through manual.
The automatic fire extinguishing valve is in the form of a pneumatic belt positioning, once the valve is reversed, the valve is positioned in an open state, and after fire extinguishment, the valve still needs to be manually reset.
The control process of the system is as follows:
1) the high-pressure gas in the gas storage tank provides high-pressure gas for a gas starting motor when the vehicle is started, and simultaneously, an air compressor attached to the explosion-proof diesel engine of the vehicle fills the high-pressure gas into the gas storage tank through a one-way valve until the gas pressure reaches a set value;
2) when the temperature of the position of the temperature detector exceeds the limit temperature, a thermosensitive pressure release element in the temperature detector bursts, a high-pressure air bag in the temperature detector is opened, the pressure in the pipeline rises, and therefore the automatic fire extinguishing valve is pushed to act; or when the temperature detector does not sense that the area generates open fire, the driver presses the manual fire-extinguishing valve;
3) after any one of the manual fire-extinguishing valve and the automatic fire-extinguishing valve acts, high-pressure gas in the gas storage tank rapidly enters the oil-breaking cylinder and the gas-breaking cylinder through the fire-extinguishing valve, the oil-breaking cylinder cuts off diesel oil supply of the engine, the gas-breaking cylinder cuts off gas inlet of the engine, and the oil-breaking cylinder and the gas-breaking cylinder act simultaneously, so that the engine is forced to extinguish, and the spread of fire is prevented; meanwhile, high-pressure gas flows through the pressurization valve, the high-pressure gas enters the closed water storage tank after being decompressed, so that water pressurization is realized, the high-pressure gas in the gas storage tank simultaneously reaches the gas control reversing valve, the valve reverses, and water in the water storage tank automatically sprays to a high-temperature point through a spray head arranged in an engine cabin through the valve, so that the fire extinguishing effect is achieved.
Because the explosion-proof diesel engine adopts a gas starting system, the whole vehicle is provided with a gas storage tank, and an air compressor attached to the diesel engine can inflate the gas storage tank, so that a stable gas source is provided. Other mining vehicles need to be provided with an air compressor and an air storage tank separately if needed.
The invention has the following beneficial effects:
1) the self-spraying fire extinguishing device adopts water as a cooling fire extinguishing medium, realizes spraying by pressurizing the air storage tank of the explosion-proof vehicle, has low maintenance cost and is easy to realize;
2) the automatic water spraying fire extinguishing device can realize manual/automatic control fire extinguishing, and the two are connected in parallel and mutually independently act;
3) the pressure of the self-spraying fire extinguishing device can be adjusted within the range of the maximum pressure which can be borne by the water storage tank, so that the water quantity is controlled;
4) the device has the advantages of simple and convenient operation and low cost, fully utilizes the existing high-pressure gas on the vehicle to pressurize to realize self-spraying fire extinguishing, and has operability. Meanwhile, the fire extinguisher has the functions of automatic fire extinguishing and manual fire extinguishing, has low requirement on operators and is convenient to popularize and apply;
5) the device can be applied to all mining explosion-proof diesel engine vehicles, can eliminate open fire or spray water to cool high-temperature parts in time by adding the device, and reduces the possibility of fire expansion, thereby avoiding personnel and equipment loss caused by large-area fire, and generating remarkable economic benefit.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the pressurization valve;
in the figure: 1. a water storage tank; 2. A water drain valve; 3. A pressurization valve; 4. Breaking the oil cylinder; 5. breaking the air cylinder; 6. A pneumatic control reversing valve; 7. an automatic fire extinguishing valve; 8. A manual fire valve; 9. A gas storage tank; 10. a safety valve; 11. A water drain valve; 12. A temperature detector; 13. A spray head; 14. a gas reservoir check valve; 15. an air compressor; 16. a one-way valve; 17. a pressure gauge; 18. a safety valve; 19. a pressure reducing valve.
Detailed Description
The embodiments of the invention will be further explained with reference to the accompanying drawings:
the vehicle-mounted self-spraying fire extinguishing system for the coal mine as shown in figure 1 comprises a water storage tank 1, a gas storage tank 9 and a plurality of spray heads 13 arranged in an engine compartment, wherein an air compressor 15 on an explosion-proof diesel engine of the vehicle is connected with an air inlet of the gas storage tank 9 through a one-way valve 14, an air outlet of the gas storage tank 9 is respectively connected with air inlets of a manual fire extinguishing valve 8 and an automatic fire extinguishing valve 7 which are connected in parallel, air outlets of the manual fire extinguishing valve 8 and the automatic fire extinguishing valve 7 are connected with three loops, the first loop is connected with an oil breaking cylinder 4 and an air breaking cylinder 5 of the engine, the second loop is connected with a pressurizing valve 3, the pressurizing valve 3 is connected with the water storage tank 1, the third loop is connected with a pneumatic.
The system is characterized as follows:
(1) the explosion-proof diesel engine vehicle usually adopts a gas starting system, high-pressure gas in a gas storage tank 9 provides high-pressure gas for a gas starting motor when the vehicle is started, and an air compressor 15 attached to the explosion-proof diesel engine fills the high-pressure gas into the gas storage tank 9 through a one-way valve 14 until the gas pressure reaches a set value. The gas storage tank 9 is connected with a safety valve 10 to limit the highest pressure of the gas storage tank and ensure the use safety. The bottom of gas holder 9 still is equipped with waterproof valve 11, because the environment is moist in the pit, after operation a period, can accumulate water in the gas holder 9, if not in time the effective volume that can influence the gas pitcher of draining.
(2) According to the operational test data, at two high temperature points of the engine compartment, two temperature probes 12 are arranged. The temperature detector only reacts to heat, if the temperature of the position of the temperature detector exceeds the limit temperature, a heat-sensitive pressure release element in the detector bursts, a high-pressure air bag in the detector is opened, the pressure in the pipeline rises, and therefore the automatic fire extinguishing valve 7 is pushed to act.
(3) The manual fire-extinguishing valve 8 is used for extinguishing fire by pressing the manual fire-extinguishing valve 8 by a driver under the condition that open fire is generated in an area which is not sensed by the temperature detector 12.
(4) The manual fire extinguishing valve 8 and the automatic fire extinguishing valve 7 are connected in parallel, so that the actions of the manual fire extinguishing valve and the automatic fire extinguishing valve are not influenced mutually, and the fire can be extinguished after any one valve is opened.
(5) The outlet of the air storage tank 9 is respectively connected to the air inlets of the manual fire extinguishing valve 8 and the automatic fire extinguishing valve 7. The air outlets of the manual fire extinguishing valve 8 and the automatic fire extinguishing valve 7 are divided into 3 paths to be connected with a rear pipeline. The 1 st way is connected to the fuel cut-off cylinder 4 and the air cut-off cylinder 5 of the engine, the fuel cut-off cylinder 4 can cut off the diesel oil supply of the engine, the air cut-off cylinder 5 can cut off the air inlet of the engine, the fuel cut-off cylinder and the air inlet can act simultaneously, the engine can be rapidly flamed out, and the spread of fire can be effectively and timely prevented. The 2 nd path is connected to a pressurizing valve 3, and high-pressure gas is decompressed through the pressurizing valve and then acts on the closed water storage tank 1, so that water pressure is generated. The 3 rd path is connected to the pneumatic control reversing valve 6, after the fire extinguishing valve acts, the generated pressure forces the pneumatic control reversing valve 6 to act, so that high-pressure water in the water storage tank flows through the valve and supplies water to a spray head 13 arranged in an engine compartment, and fire extinguishing is achieved.
(6) The manual fire extinguishing valve 8 is positioned manually, can be positioned in an opening state after being released after being manually operated, and can be reset manually after the fire is extinguished.
(7) The automatic fire extinguishing valve 7 is located by a pneumatic belt, the automatic fire extinguishing valve 7 can be reversed after the high-pressure air bag in the temperature detector 12 explodes to generate pressure, once the automatic fire extinguishing valve is reversed, the automatic fire extinguishing valve is located in an opening state, and after fire extinguishment, the automatic fire extinguishing valve still needs to be manually reset.
(8) The principle of the composition of the pressurizing valve 3 is shown in fig. 2. It is composed of 4 parts, such as one-way valve, pressure gauge, pressure reducing valve and safety valve. The pressure reducing valve 19 is used to reduce the pressure of the pressurized air in the air reservoir 9 flowing into the water reservoir 1. The water storage tank 1 belongs to a low-pressure closed pressure container, the maximum pressure which can be borne by the water storage tank 1 is lower than 3bar generally, and the maximum gas pressure in the gas storage tank 9 can reach 8bar, so that the pressure in the gas storage tank needs to be reduced to ensure the use safety. The pressure of the pressure reducing valve 19 can be manually adjusted, and the pressure gauge 17 at the downstream can display the pressure reducing pressure in real time and can achieve the purpose of adjusting the water pressure. To ensure safety, the safety valve 18 is used to limit the maximum gas pressure in the tank 1, ensuring that even if the pressure reducing valve 19 is damaged, the tank 1 is not deformed by the gas pressure being too high. The one-way valve 16 is used for preventing water in the water storage tank 1 from flowing back to the gas pipeline, and the service life of a related pneumatic component is influenced.
(9) The working process of the vehicle-mounted self-spraying fire extinguishing system is as follows: any one of the manual fire valve 8 and the automatic fire valve 7 acts, high-pressure gas in the gas storage tank 9 rapidly passes through the fire valve, enters the oil breaking cylinder 4 and the air breaking cylinder 5, forces the engine to extinguish, flows through the pressure valve, enters the closed water storage tank 1 after pressure reduction, thereby realizing water pressurization, the high-pressure gas in the gas storage tank 9 simultaneously reaches the pneumatic control reversing valve 6, the valve reverses, water in the water storage tank 1 automatically sprays to a high-temperature point through a nozzle arranged in an engine cabin through the valve, and thereby the fire extinguishing effect is achieved.
The low-cost vehicle-mounted self-spraying fire extinguishing system can be started manually, the fire extinguishing medium is water, the gas storage tank on the explosion-proof vehicle is used as a pressurized gas source, whether high temperature exists locally is detected by the temperature detector arranged in the engine compartment, if the temperature exceeds the standard, the temperature detector acts to trigger the related control valve to act, and finally the pressurized water is sprayed to a high-temperature point, so that the effect of temperature reduction and fire extinguishing is achieved. The device has the advantages of simple operation, easy maintenance and low cost of fire extinguishing medium, does not have electrical elements, is convenient to widely popularize in underground coal mine vehicles, and has important significance for improving the safety of vehicle operation.
Claims (6)
1. A vehicle-mounted self-spraying fire extinguishing system for coal mines is characterized by comprising a water storage tank (1), the air compressor (15) on the vehicle explosion-proof diesel engine is connected with an air inlet of the air storage tank (9) after passing through a one-way valve (14), an air outlet of the air storage tank (9) is respectively connected with air inlets of a manual fire-extinguishing valve (8) and an automatic fire-extinguishing valve (7) which are connected in parallel, air outlets of the manual fire-extinguishing valve (8) and the automatic fire-extinguishing valve (7) are connected with three loops, the first loop is connected with a cylinder (4) and a cylinder (5) of the engine, the second loop is connected with a pressurizing valve (3), the pressurizing valve (3) is connected with a water storage tank (1), the third loop is connected with a pneumatic control reversing valve (6), and the pneumatic control reversing valve (6) is arranged on the connecting loop between the water storage tank (1) and the spray head (13;
temperature detectors (12) are respectively arranged at two high-temperature points of a supercharger and an air compressor in an engine compartment, and the temperature detectors (12) are connected with a control port of an automatic fire-extinguishing valve (7); the temperature detector (12) only reacts to heat, if the temperature of the position where the temperature detector is located exceeds the limit temperature, a thermosensitive pressure release element in the temperature detector (12) bursts, a high-pressure air bag in the temperature detector (12) is opened, the pressure in the pipeline rises, and therefore the automatic fire extinguishing valve (7) is pushed to act.
2. The vehicle-mounted automatic sprinkler system for coal mine according to claim 1, characterized in that the pressurizing valve (3) comprises a check valve (16) for preventing water in the water storage tank (1) from flowing backward into the gas pipeline, a pressure gauge (17) for displaying the pressure in real time, a safety valve (18) for defining the maximum gas pressure in the water storage tank (1), and a pressure reducing valve (19) for reducing the pressurizing pressure in the gas storage tank (9) flowing into the water storage tank (1), the check valve (16), the pressure gauge (17), the safety valve (18), and the pressure reducing valve (19) being connected in sequence.
3. The vehicle-mounted automatic sprinkler system for coal mines according to claim 2, wherein a water discharge valve (11) is installed at the bottom of the air storage tank (9).
4. The vehicle-mounted automatic sprinkler system for coal mines according to claim 3, characterized in that the manual fire valve (8) is configured in a manual belt positioning manner, and can be positioned in an open state after being released after manual operation, and can be reset manually after the fire is extinguished.
5. The vehicle-mounted automatic sprinkler system for coal mines according to claim 4, characterized in that the automatic fire extinguishing valve (7) is configured in such a way that the pneumatic belt is positioned, and once reversed, the valve is positioned in an open state, and after fire extinguishing, the valve is manually reset.
6. The coal mine vehicle-mounted self-spraying fire extinguishing system according to claim 5, characterized in that the control process of the system is as follows:
1) high-pressure gas in the gas storage tank (9) provides high-pressure gas for a gas starting motor when a vehicle is started, and simultaneously, a gas compressor (15) attached to an explosion-proof diesel engine of the vehicle fills the high-pressure gas into the gas storage tank (9) through a one-way valve (14) until the gas pressure reaches a set value;
2) when the temperature of the position of the temperature detector (12) exceeds the limit temperature, a thermosensitive pressure release element in the temperature detector (12) bursts, a high-pressure air bag in the temperature detector (12) is opened, the pressure in the pipeline is increased, and therefore the automatic fire extinguishing valve (7) is pushed to act; or when the temperature detector (12) does not sense that the open fire is generated in the area, the driver presses the manual fire-extinguishing valve (8);
3) after any one of the manual fire extinguishing valve (8) and the automatic fire extinguishing valve (7) acts, high-pressure gas in the gas storage tank (9) rapidly enters the oil breaking cylinder (4) and the gas breaking cylinder (5) through the fire extinguishing valve, the oil breaking cylinder (4) cuts off diesel oil supply of the engine, the gas breaking cylinder (5) cuts off gas inlet of the engine, and the two act simultaneously, so that the engine is forced to extinguish, and the spread of fire is prevented; meanwhile, high-pressure gas flows through the pressurizing valve (3), the high-pressure gas enters the closed water storage tank (1) after being decompressed, so that water pressurization is realized, the high-pressure gas in the gas storage tank (9) simultaneously reaches the pneumatic control reversing valve (6), the valve is reversed, and the water in the water storage tank (1) automatically sprays to a high-temperature point through the valve through a spray head (13) arranged in an engine compartment, so that the fire extinguishing effect is achieved.
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| CN115845289A (en) * | 2022-12-12 | 2023-03-28 | 中国煤炭科工集团太原研究院有限公司 | Mining vehicular dual passive automatic fire extinguishing system |
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