Fireproof monitoring system and method for underground coal mine belt conveyor

Abstract

The invention relates to a fire prevention monitoring system and method for an underground coal mine belt conveyor, and belongs to the technical field of underground coal mine fire prevention. According to the technical scheme, temperature measurement is carried out below a belt and at each carrier roller, video inspection of a belt conveyor is carried out, when the temperature of a certain point reaches an alarm value, the belt conveyor is automatically moved to the point for small-range water spraying fire prevention, small-range water spraying fire prevention of the temperature alarm point is achieved, and fire disasters are prevented in time. The belt conveyor is prevented from catching fire, the temperature and pictures of all points of the belt can be clearly known, temperature measurement and video inspection are conducted on the whole area of the belt, small-range movable water spraying cooling is conducted on the points with the temperature reaching the alarm value, and the accidents of fire disasters caused by the belt and casualties caused in an underground coal mine are prevented; and particularly, the device has great economic benefits and social benefits in the aspects of preventing fire accidents and guaranteeing the life safety of personnel in an underground coal mine.

Description

Technical Field

[0001] The present invention relates to a fire prevention monitoring system and method for a belt conveyor underground in a coal mine, and belongs to the technical field of fire prevention underground in a coal mine. Background Art

[0002] The production environment conditions of underground coal mines are complex and the space is narrow. Preventing and monitoring fires is of utmost importance. The existing fire prevention monitoring systems are all comprehensive monitoring. For example, the Chinese patent application No. 202211657313.5 with the title "A Precise Monitoring and Multiple Prevention and Control System for Coal Mine Fires", etc. There is no dedicated fire prevention monitoring system for belt conveyors in the existing technologies. Belt conveyors are the main transportation equipment underground in coal mines. They have a large transportation volume, simple maintenance, and a long conveying distance, and are widely used underground in coal mines. However, belt conveyors have the following problems: 1. Due to the long distance and a large number of belt rollers during operation, when the roller bearings are damaged, the rollers stop rotating and generate friction with the belt, and the temperature continuously rises, which is prone to cause the accident of igniting the belt; 2. When coal accumulates at the head and tail of the belt conveyor, after the coal generates friction with the belt, it is easy to ignite the coal, and then the accident of igniting the belt will occur; 3. When the belt deviates and has intense friction with the rack, it is easy to cause the belt to soften and burn, and in severe cases, it will even catch fire. Since the belt material of the conveyor does not have flame retardant properties, that is, it is flammable or difficult to extinguish under the action of fire, it will increase the risk of fire. And the ignition point of the belt is concealed, and the accident ignition point is random. At present, due to technical limitations, the position of the ignition point cannot be judged in advance and the ignition point cannot be discovered in advance. In addition, the underground belt roadway fire hydrant valves are generally set at intervals of 50 meters along the belt roadway. The fire extinguishing system cannot effectively extinguish the fire under the belt coverage; moreover, once a fire occurs, the burning belt will generate a large amount of toxic smoke, which will pose a threat to the safety of personnel. Because the underground of a coal mine is a closed space, basically no rescue can be carried out, and many major casualties have occurred. Therefore, preventing the belt conveyor from catching fire is of great significance, especially in terms of preventing fire accidents and ensuring the safety of personnel underground in a coal mine, which has great economic and social benefits. Summary of the Invention

[0003] The purpose of the present invention is to provide a fire prevention monitoring system and method for a belt conveyor underground in a coal mine, which can prevent the belt conveyor from catching fire, and can also clearly know the temperature and picture of each point of the belt. Especially in terms of preventing fire accidents and ensuring the safety of personnel underground in a coal mine, it has great economic and social benefits, and solves the above-mentioned technical problems existing in the existing technologies.

[0004] The technical solution of the present invention is as follows: A fire prevention monitoring system for a belt conveyor in a coal mine, comprising a main belt drive roller, lower idlers, upper idlers, a lower belt, an upper belt, a belt rack and a tail roller. A belt rack is arranged between the main belt drive roller and the tail roller of the belt conveyor. Lower idlers and upper idlers are respectively arranged on the belt rack, and the lower idlers and upper idlers respectively support the lower belt and the upper belt of the endless belt; The special feature is that: N temperature measurement optical fibers are laid along the running direction of the belt under the lower belt and the upper belt to measure the temperature of the areas below the lower belt and the upper belt and the lower idlers and upper idlers in real time. The N temperature measurement optical fibers are connected to a control center to display the real-time temperature of each point of the belt conveyor; On the upper left and upper right of the belt conveyor, a endless rope winch drive wheel and a endless rope guide pulley are respectively arranged. An endless rope upper rope and an endless rope lower rope are matched between the endless rope winch drive wheel and the endless rope guide pulley. The endless rope lower rope is matched with a pulley groove whose length covers the entire belt conveyor. A plurality of endless rope pulleys are arranged in the pulley groove. The axle of the endless rope pulley is fixed on the endless rope lower rope. A control platform is arranged on the endless rope pulley. A fire water electric valve, an explosion-proof infrared camera, a lower belt fire nozzle and an upper belt fire nozzle are arranged on the control platform. The lower belt fire nozzle and the upper belt fire nozzle are respectively aimed at the lower belt and the upper belt of the belt conveyor. The fire water pipe is connected to the lower belt fire nozzle and the upper belt fire nozzle through the fire water electric valve; The endless rope lower rope moves back and forth above the belt conveyor, driving the endless rope pulley to move back and forth in the pulley groove, and the endless rope pulley drives the control platform to move back and forth; When the temperature measurement optical fiber detects that the temperature at a certain point exceeds the set alarm value, the control center issues an alarm. After the control platform moves to the alarm point, the corresponding fire water electric valve opens, and the lower belt fire nozzle and the upper belt fire nozzle spray water to cool down and extinguish the fire until the temperature at this point is lower than the set alarm value, and the control platform continues to move back and forth.

[0005] The temperature measurement optical fiber is laid along the running direction of the belt conveyor to measure the temperature of the entire belt and each idler; An explosion-proof infrared camera is installed on the control platform to conduct video inspection on the belt conveyor.

[0006] The endless rope winch drive wheel is driven by a reciprocating endless rope winch driver and is connected to the control center through a control line to accept control.

[0007] The control center is provided with a network control center.

[0008] A control platform base is arranged on the control platform, and the explosion-proof infrared camera is arranged on the control platform base.

[0009] A control bus drag groove is arranged above the belt conveyor. A plurality of control buses are arranged in the control bus drag groove. The number of control buses is the same as the number of endless rope pulleys and is matched with the drive wheel connector through the control bus.

[0010] The number N of the temperature-measuring optical fibers is 8, and the temperature-measuring optical fibers are numbered from 1 to 8. They are laid along the running direction of the belt below the lower belt and the upper belt. The length of one temperature-measuring optical fiber can reach up to 10 kilometers at most. The number and length can be set according to the on-site environment. The lower area of the belt and each idler are measured for real-time temperature and the data is uploaded to the control center, and the real-time temperature of each point of the belt conveyor is displayed through the network control center; There is one control platform every 100 meters. The control center controls the reciprocating endless-rope winch driver to drive the endless-rope winch driving wheel to traction the endless-rope upper rope and the endless-rope lower rope to drive the control platform to move reciprocally within a fixed range along the belt direction. Under normal circumstances, the control platform moves reciprocally, and the video images of the belt running conditions are transmitted to the control center and uploaded through the network control center for video inspection of the belt conveyor.

[0011] When the temperature-measuring optical fiber detects that the temperature at a certain point exceeds the set alarm value, the control center issues an alarm. After the control platform moves to the alarm point, the corresponding fire-water electric valve opens, and the lower-belt fire nozzles and the upper-belt fire nozzles spray water to cool down and extinguish the fire within a range of 2 meters around the alarm point until the temperature at this point is lower than the set alarm value, and then the control platform continues to move reciprocally.

[0012] An operation method of the above-mentioned fire prevention monitoring system for a belt conveyor in a coal mine. The control center controls the reciprocating endless-rope winch driver to drive the endless-rope winch driving wheel to traction the endless-rope upper rope and the endless-rope lower rope to drive the control platform to move reciprocally within a fixed range along the belt direction. Under normal circumstances, the control platform moves reciprocally, and the video images of the belt running conditions are transmitted to the control center and uploaded through the network control center for video inspection of the belt conveyor; when the temperature-measuring optical fiber detects that the temperature at a certain point exceeds the set alarm value, the control center issues an alarm. After the control platform moves to the alarm point, the corresponding fire-water electric valve opens, and the lower-belt fire nozzles and the upper-belt fire nozzles spray water to cool down and extinguish the fire around the alarm point until the temperature at this point is lower than the set alarm value, and then the control platform continues to move reciprocally.

[0013] The positive effects of the present invention: The present invention measures the temperature under the belt and at each idler, and conducts video inspection of the belt conveyor. When the temperature at a certain point reaches the alarm value, it automatically moves to the point to spray water for fire prevention in a small range, realizing small-range water spraying for fire prevention at the temperature alarm point and timely preventing the occurrence of fires. The present invention can prevent the belt conveyor from catching fire, and can also clearly know the temperature and images of each point of the belt, conduct temperature measurement and video inspection of the entire belt area, and conduct small-range moving water spraying and cooling for the points where the temperature reaches the alarm value, preventing accidents of casualties caused by belt fires in the coal mine, especially having great economic and social benefits in preventing the occurrence of fire accidents and ensuring the safety of personnel in the coal mine. Description of the Drawings

[0014] Figure 1 Schematic diagram of the operation of the embodiment of the present invention; Figure 2 Schematic diagram of the structure of the embodiment of the present invention; Figure 3 Schematic diagram of the arrangement of the temperature-measuring optical fiber in the embodiment of the present invention; Figure 4 Schematic diagram of the control platform in the embodiment of the present invention; In the figure: the top of the belt roadway 1, the bottom of the roadway 2, the side of the roadway 3, the fire upper water pipe 4, the fire gate 5, the fire water inlet 6, the main belt driving roller 7, the lower idler 8, the upper idler 9, the lower belt 10, the upper belt 11, the belt rack 12, the tail roller 13, the reciprocating endless rope winch driver A1, the endless rope winch driving wheel A2, the control bus and driving wheel connector A3, the control bus A4, the control bus drag groove A5, the endless rope upper rope A6, the pulley groove A7, the endless rope lower rope A8, the endless rope guiding pulley A9, the control platform A10, the temperature-measuring optical fiber A11, the lower belt fire nozzle A13, the upper belt fire nozzle A14, the control center A12, the network control center A12-9, the control line A12-5, the fire water electric valve A15, the endless rope pulley A16, the explosion-proof infrared camera A17, the control platform base A18. Detailed implementation manners

[0015] The following further describes the present invention through embodiments in conjunction with the accompanying drawings.

[0016] A fire prevention monitoring system for a belt conveyor in a coal mine, which includes a main belt drive roller 7, lower idlers 8, upper idlers 9, lower belt 10, upper belt 11, a belt frame 12 and a tail roller 13. A belt frame 12 is arranged between the main belt drive roller 7 and the tail roller 13 of the belt conveyor. Lower idlers 8 and upper idlers 9 are respectively arranged on the belt frame 12. The lower idlers 8 and upper idlers 9 respectively support the lower belt 10 and the upper belt 11 of the endless belt. The special feature is that N temperature-measuring optical fibers A11 are laid along the running direction of the belt under the lower belt 10 and the upper belt 11 to measure the temperature of the areas under the lower belt 10 and the upper belt 11 and the lower idlers 8 and upper idlers 9 in real time. The N temperature-measuring optical fibers A11 are connected to a control center A12 to display the real-time temperature of each point of the belt conveyor. An endless rope winch drive wheel A2 and an endless rope guiding pulley A9 are respectively arranged above the left and right of the belt conveyor. An endless rope upper rope A6 and an endless rope lower rope A8 are matched between the endless rope winch drive wheel A2 and the endless rope guiding pulley A9. The endless rope lower rope A8 is matched with a pulley groove A7 whose length covers the entire belt conveyor. A plurality of endless rope pulleys A16 are arranged in the pulley groove A7. The axle of the endless rope pulley A16 is fixed on the endless rope lower rope A8. A control platform A10 is arranged on the endless rope pulley A16. A fire water electric valve A15, an explosion-proof infrared camera A17, a lower belt fire nozzle A13 and an upper belt fire nozzle A14 are arranged on the control platform A10. The lower belt fire nozzle A13 and the upper belt fire nozzle A14 respectively aim at the lower belt 10 and the upper belt 11 of the belt conveyor. The fire water pipe is connected to the lower belt fire nozzle A13 and the upper belt fire nozzle A14 through the fire water electric valve A15. The endless rope lower rope A8 reciprocates above the belt conveyor, driving the endless rope pulley A16 to reciprocate in the pulley groove A7, and the endless rope pulley A16 drives the control platform A10 to reciprocate. When the temperature-measuring optical fiber A11 detects that the temperature of a certain point exceeds the set alarm value, the control center A12 issues an alarm. After the control platform A10 moves to the alarm point, the corresponding fire water electric valve A15 is opened, and the lower belt fire nozzle A13 and the upper belt fire nozzle A14 spray water to cool down and extinguish the fire until the temperature of this point is lower than the set alarm value, and the control platform A10 continues to reciprocate.

[0017] The temperature-measuring optical fiber is laid along the running direction of the belt conveyor to measure the temperature of the entire belt and each idler.

[0018] An explosion-proof infrared camera is installed on the control platform to conduct video inspection of the belt conveyor.

[0019] The endless rope winch drive wheel A2 is driven by a reciprocating endless rope winch driver A1 and is connected to the control center A12 through a control line A12-5 to receive control.

[0020] The control center A12 is provided with a network control center A12-9.

[0021] The control platform A10 is provided with a control platform base A18, and the explosion-proof infrared camera A17 is arranged on the control platform base A18.

[0022] A control busbar dragging groove A5 is arranged above the belt conveyor, and a plurality of control busbars A4 are arranged in the control busbar dragging groove A5. The number of the control busbars A4 is the same as the number of the endless rope pulleys A16, and the control busbars are matched with the driving wheel connector A3.

[0023] In the embodiment, the number N of the temperature measuring optical fibers A11 is 8, and the number of the temperature measuring optical fibers A11 is 1 to 8. They are laid below the lower belt 10 and the upper belt 11 along the running direction of the belts. The length of one temperature measuring optical fiber is up to 10 kilometers. The number and length can be set according to the on-site environment. The temperature of the area below the belt and each roller is measured in real time and uploaded to the control center A12. The real-time temperature of each point of the belt conveyor is displayed through the network control center A12-9; The control platform A10 is arranged every 100 meters. The control center A12 controls the reciprocating endless rope winch driver A1 to drive the endless rope winch driving wheel A2 to pull the endless rope upper rope A6 and the endless rope lower rope A8 along the belt direction to drive the control platform A10 to reciprocate within a fixed range. Under normal circumstances, the control platform A10 reciprocates, and the video screen of the belt operation status is transmitted to the control center A12 and uploaded to the network control center A12-9 to conduct video inspection of the belt conveyor.

[0024] When the temperature measuring optical fiber A11-N detects that the temperature of a certain point exceeds the set alarm value, the control center A12 issues an alarm. After the control platform A10 moves to the alarm point, the corresponding fire water electric valve A15 opens, and the lower belt fire nozzle A13 and the upper belt fire nozzle A14 spray water to cool down and extinguish the fire within a range of 2 meters around the alarm point until the temperature at the point is lower than the set alarm value, and the control platform A10 continues to reciprocate.

[0025] An operation method of the above-mentioned fire prevention monitoring system for belt conveyors in coal mines. The control center A12 controls the reciprocating endless rope winch driver A1 to drive the endless rope winch driving wheel A2 to traction the endless rope upper rope A6 and the endless rope lower rope A8 to drive the control platform A10 to move reciprocally within a fixed range along the belt direction. Under normal circumstances, the control platform A10 runs reciprocally, and the video images of the belt operation status are transmitted to the control center A12 and uploaded through the network control center A12-9 for video inspection of the belt conveyor. When the temperature measurement optical fiber A11 detects that the temperature at a certain point exceeds the set alarm value, the control center A12 issues an alarm. After the control platform A10 moves to the alarm point, the corresponding fire water electric valve A15 is opened, and the lower belt fire nozzle A13 and the upper belt fire nozzle A14 spray water around the alarm point for cooling and extinguishing the fire until the temperature at this point is lower than the set alarm value, and then the control platform A10 continues to move reciprocally.

Claims

1. A fire prevention monitoring system for a belt conveyor underground in a coal mine, comprising a main belt drive roller (7), lower idlers (8), upper idlers (9), a lower belt (10), an upper belt (11), a belt support (12) and a tail roller (13). A belt support (12) is arranged between the main belt drive roller (7) and the tail roller (13) of the belt conveyor. Lower idlers (8) and upper idlers (9) are respectively arranged on the belt support (12), and the lower idlers (8) and the upper idlers (9) respectively support the lower belt (10) and the upper belt (11) of the endless belt. It is characterized in that: N temperature-measuring optical fibers (A11) are laid along the running direction of the belt below the lower belt (10) and the upper belt (11) to measure the temperature of the areas below the lower belt (10) and the upper belt (11) and the lower idler (8) and the upper idler (9) in real time. The N temperature-measuring optical fibers (A11) are connected to the control center (A12) to display the real-time temperature of each point of the belt conveyor; endless rope winch drive wheels (A2) and endless rope guide pulleys (A9) are respectively arranged above the left and right of the belt conveyor. An endless rope upper rope (A6) and an endless rope lower rope (A8) are matched between the endless rope winch drive wheel (A2) and the endless rope guide pulley (A9). The endless rope lower rope (A8) is matched with a pulley groove (A7) whose length covers the entire belt conveyor. A plurality of endless rope pulleys (A16) are arranged in the pulley groove (A7). The axle of the endless rope pulley (A16) is fixed on the endless rope lower rope (A8). A control platform (A10) is arranged on the endless rope pulley (A16). A fire water electric valve (A15), an explosion-proof infrared camera (A17), a lower belt fire nozzle (A13) and an upper belt fire nozzle (A14) are arranged on the control platform (A10). The lower belt fire nozzle (A13) and the upper belt fire nozzle (A14) are respectively aligned with the lower belt (10) and the upper belt (11) of the belt conveyor. The fire water pipe is connected to the lower belt fire nozzle (A13) and the upper belt fire nozzle (A14) through the fire water electric valve (A15); the endless rope lower rope (A8) reciprocates above the belt conveyor, driving the endless rope pulley (A16) to reciprocate in the pulley groove (A7), and the endless rope pulley (A16) drives the control platform (A10) to reciprocate; when the temperature-measuring optical fiber (A11) detects that the temperature of a certain point exceeds the set alarm value, the control center (A12) issues an alarm. After the control platform (A10) moves to the alarm point, the corresponding fire water electric valve (A15) is opened, and the lower belt fire nozzle (A13) and the upper belt fire nozzle (A14) spray water to cool down and extinguish the fire until the temperature of this point is lower than the set alarm value, and the control platform (A10) continues to reciprocate.

2. The fire prevention monitoring system for a belt conveyor in a coal mine according to claim 1, wherein: The temperature-measuring optical fiber is laid along the running direction of the belt conveyor to measure the temperature of the entire belt and each idler; an explosion-proof infrared camera is installed on the control platform to conduct video inspection on the belt conveyor.

3. A fire prevention monitoring system for a belt conveyor in a coal mine according to claim 1 or 2, characterized in that: The endless rope winch drive wheel (A2) is driven by a reciprocating endless rope winch driver (A1) and is connected to the control center (A12) through a control line (A12-5) to receive control.

4. A fire prevention monitoring system for a belt conveyor in a coal mine according to claim 1 or 2, characterized in that: The control center (A12) is provided with a network control center (A12-9).

5. A fire prevention monitoring system for a belt conveyor in a coal mine according to claim 1 or 2, characterized in that: A control platform base (A18) is arranged on the control platform (A10), and the explosion-proof infrared camera (A17) is arranged on the control platform base (A18).

6. A method for operating a fire prevention monitoring system of a belt conveyor in a coal mine as described in any one of claims 1-5, characterized in that: The control center (A12) controls the reciprocating endless rope winch driver (A1) to drive the endless rope winch drive wheel (A2) to tow the endless rope upper rope (A6) and the endless rope lower rope (A8) to drive the control platform (A10) to reciprocate within a fixed range along the belt direction; under normal circumstances, the control platform (A10) reciprocates, and the video picture of the belt operation status is transmitted to the control center (A12) and uploaded through the network control center (A12-9) to conduct video inspection of the belt conveyor; when the temperature measurement optical fiber (A11) detects that the temperature at a certain point exceeds the set alarm value, the control center (A12) issues an alarm. After the control platform (A10) moves to the alarm point, the corresponding fire water electric valve (A15) is opened, and the lower belt fire nozzle (A13) and the upper belt fire nozzle (A14) spray water around the alarm point to cool down and extinguish the fire until the temperature at this point is lower than the set alarm value, and the control platform (A10) continues to reciprocate.

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