Coal spontaneous combustion prevention and control device for coal yard

Abstract

The coal spontaneous combustion prevention and control device comprises a first positioning plate and a second positioning plate, the first positioning plate is rotationally connected with a first gear, the first positioning plate is fixedly provided with a first motor for driving the first gear to rotate, and the first positioning plate is rotationally connected with a plurality of second gears in the circumferential direction of the first gear; the second gears are meshed with the first gears, the second gears are in threaded connection with screws, the screws penetrate through the first positioning plate and are fixedly connected with inserting rods, the ends, away from the inserting rods, of the screws are fixedly connected with the second positioning plate, the inserting rods are provided with first temperature sensors, and first feeding cavities are formed in the inserting rods; the screw is provided with a second feeding cavity communicated with the corresponding first feeding cavity, a feeding port is formed in the end, close to the second positioning plate, of the screw, the inserting rod is provided with a plurality of spraying holes in the circumferential direction, and the spraying holes are all communicated with the first feeding cavity. According to the technical scheme, the coal spontaneous combustion control effect of the high-temperature area in the coal pile can be improved.

Description

Technical Field

[0001] The present invention relates to the field of preventing coal spontaneous combustion, and in particular to a device for preventing coal spontaneous combustion in a coal yard. Background Art

[0002] As an important energy resource, coal is prone to spontaneous combustion due to oxidation reactions during storage, which not only causes economic losses but also brings serious safety hazards and environmental pollution. To ensure the safety and economy of coal storage, the fire prevention and extinguishing technologies in coal yards have received extensive attention and development. Currently, various technical measures for preventing coal pile spontaneous combustion have been formed in the industry, and these technologies have played a positive role in improving coal storage efficiency and reducing fire risks.

[0003] In related technologies, to prevent coal piles from spontaneous combustion in coal yards, commonly used methods include covering with dust-proof nets, artificially sprinkling water for cooling, and spraying with flame retardants. Among them, covering with dust-proof nets is mainly used to isolate air to slow down the oxidation rate; artificial sprinkling reduces heat accumulation by lowering the surface temperature of the coal pile; spraying with materials for preventing coal spontaneous combustion can effectively prevent oxygen from contacting combustibles to achieve the purpose of fire prevention.

[0004] Regarding the above related technologies, the existing methods for preventing coal spontaneous combustion have certain limitations. Especially when facing large-area open coal piles in coal yards, there are likely to be some high-temperature areas inside the coal piles. Traditional artificial sprinkling or equipment for spraying materials for preventing coal spontaneous combustion only sprays on the surface of the coal pile and cannot treat the high-temperature areas inside the coal pile, and local overheating may still occur, inducing spontaneous combustion of the coal pile, resulting in poor effects of preventing coal spontaneous combustion. Summary of the Invention

[0005] In order to treat the high-temperature areas inside the coal pile for preventing coal spontaneous combustion and improve the effect of preventing coal spontaneous combustion, the present application provides a device for preventing coal spontaneous combustion in a coal yard.

[0006] The present application provides a device for preventing coal spontaneous combustion in a coal yard, adopting the following technical solutions:

[0007] A coal spontaneous combustion prevention and control device for a coal yard comprises a first positioning plate and a second positioning plate, wherein the first positioning plate is rotatably connected to a first gear, the first positioning plate is fixedly provided with a first motor that drives the first gear to rotate, the first positioning plate is rotatably connected to a plurality of second gears along the circumferential direction of the first gear, the second gears are all meshed with the first gear, the second gears are all threadedly connected with a screw, the screws are all passed through the first positioning plate and fixedly connected to an insertion rod, the end of the screw facing away from the insertion rod is fixedly connected to the second positioning plate, the insertion rod is provided with a first temperature sensor, a first material running cavity is provided inside the insertion rod, a second material running cavity that is connected to the corresponding first material running cavity is provided with a screw, a feed port is provided at one end of the screw close to the second positioning plate, a plurality of injection holes are provided circumferentially along the insertion rod, and the injection holes are all connected to the first material running cavity.

[0008] By adopting the above technical scheme, the insertion rod is inserted into the coal pile from above the coal pile, and the first temperature sensor detects the high-temperature area inside the coal pile. After the high-temperature area is detected, the first positioning plate is placed on the surface of the coal pile, and the first motor is started. Under the meshing transmission action of the second gear and the first gear, the screw moves along its length direction, and the screw drives the insertion rod to move in the coal pile when it moves. When the insertion rod moves to the high-temperature area in the coal pile, the first motor stops rotating, and the coal spontaneous combustion prevention and control material enters from the feed port, flows through the second feeding cavity and the first feeding cavity, and is finally sprayed out from the spray hole, spraying the coal spontaneous combustion prevention and control material on the high-temperature area in the coal pile to suppress the spontaneous combustion of coal in the high-temperature area; at the same time, the output shaft of the first motor can be reversed to drive the insertion rod to rotate in the high-temperature area while moving up and down. During the movement, the spray hole continuously sprays the coal spontaneous combustion prevention and control material, expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area, and further improving the coal spontaneous combustion prevention and control effect in the high-temperature area.

[0009] Optionally, the first positioning plate is rotatably connected to a supporting plate on a side facing away from the second positioning plate, the supporting plate is fixedly provided with a second motor, the output end of the second motor is fixedly connected to a third gear, and the first positioning plate is circumferentially fixedly connected to a gear ring meshing with the third gear.

[0010] By adopting the above technical solution, the supporting plate is placed on the coal pile. When the insertion rod is inserted into the high-temperature area in the coal pile, the second motor drives the third gear to rotate. Under the meshing transmission of the ring gear and the third gear, the first positioning plate drives all the insertion rods to rotate around the center of the first positioning plate. During the rotation, the spray hole continuously sprays out the coal spontaneous combustion prevention material, further expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area, which is beneficial to improving the coal spontaneous combustion prevention effect in the high-temperature area.

[0011] Optionally, a buffer pad is fixedly connected to the lower end surface of the support plate.

[0012] By adopting the above technical solution, the buffer pad has a certain elastic deformation ability. When the supporting plate is placed on the surface of the coal pile, the buffer pad is conducive to improving the stability of the supporting plate and ensuring the stability of the coal spontaneous combustion prevention materials during spraying.

[0013] Optionally, a first air passage cavity is formed inside the insertion rod, a second air passage cavity communicating with the corresponding first air passage cavity is formed in the screw rod, an air inlet is provided at one end of the screw rod close to the second positioning plate, and a plurality of ventilation holes are arranged along the circumferential direction of the insertion rod, and the ventilation holes are all communicated with the first air passage cavity.

[0014] By adopting the above technical solution, inert gas is introduced from the air inlet, and then the inert gas flows through the second air passage cavity and the first air passage cavity and sprays out from the ventilation holes, introducing inert gas into the high-temperature area in the coal pile, reducing the oxygen concentration in the high-temperature area to prevent coal spontaneous combustion, and further improving the prevention effect on coal spontaneous combustion.

[0015] Optionally, a spiral stirring blade is fixedly connected to the outer wall of the insertion rod.

[0016] By adopting the above technical solution, when the insertion rod rotates in the coal pile, the spiral stirring blade rotates with the insertion rod, stirring the coal on the moving path of the insertion rod, which is convenient for ensuring the smoothness of the moving path of the insertion rod.

[0017] Optionally, a plurality of counterweight blocks are fixedly connected to both the first positioning plate and the second positioning plate.

[0018] By adopting the above technical solution, the counterweight blocks are convenient for increasing the overall weight of the coal spontaneous combustion prevention device and are beneficial to improving the overall stability of the coal spontaneous combustion prevention device.

[0019] Optionally, a plurality of second temperature sensors are provided at one end of the first positioning plate facing away from the first gear.

[0020] By adopting the above technical solution, the second temperature sensors can detect the temperature of the coal pile surface. When it is detected that the surface temperature of a certain area of the coal pile is relatively high and there is a risk of coal spontaneous combustion, the coal spontaneous combustion prevention device can be placed above this area by using a hoisting device to treat the high-temperature area on the coal pile surface, which is beneficial to improving the multi-applicability of the device.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Insert the insertion rod into the coal pile from above the coal pile. The first temperature sensor detects the high-temperature area inside the coal pile. After detecting the high-temperature area, place the first positioning plate on the surface of the coal pile, start the first motor. Under the meshing drive of the second gear and the first gear, the screw rod moves along its length direction. When the screw rod moves, it drives the insertion rod to move inside the coal pile. When the insertion rod moves to the high-temperature area inside the coal pile, the first motor stops rotating. The coal spontaneous combustion prevention material enters from the feed port, flows through the second material passage cavity and the first material passage cavity, and finally sprays out from the material spraying hole, spraying the coal spontaneous combustion prevention material on the high-temperature area inside the coal pile to inhibit the spontaneous combustion of coal in the high-temperature area. At the same time, the output shaft of the first motor can rotate forward and backward, driving the insertion rod to rotate and move up and down inside the high-temperature area. During the movement, the material spraying hole continuously sprays the coal spontaneous combustion prevention material, expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area and further improving the prevention effect on the spontaneous combustion of coal in the high-temperature area;

[0023] 2. Place the supporting plate on the coal pile. When the insertion rod inserts into the high-temperature area inside the coal pile, the second motor drives the third gear to rotate. Under the meshing drive of the gear ring and the third gear, the first positioning plate drives all the insertion rods to rotate around the center of the first positioning plate. During the rotation, the material spraying hole continuously sprays the coal spontaneous combustion prevention material, further expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area and being beneficial to improving the prevention effect on the spontaneous combustion of coal in the high-temperature area;

[0024] 3. Pass the inert gas in from the air inlet. Then the inert gas flows through the second air passage cavity and the first air passage cavity and sprays out from the air venting hole, passing the inert gas into the high-temperature area inside the coal pile, reducing the oxygen concentration in the high-temperature area to prevent the spontaneous combustion of coal and further improving the prevention effect on the spontaneous combustion of coal. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of a device for preventing spontaneous combustion of coal in a coal yard according to an embodiment of the present application.

[0026] Figure 2 is the connection schematic diagram of the first positioning plate and the screw rod.

[0027] Figure 3 is the cross-sectional schematic diagram of the screw rod and the insertion rod.

[0028] Description of the Reference Numerals: 1. First positioning plate; 11. First gear; 12. First motor; 13. Second gear; 14. Screw rod; 141. Second material passage cavity; 142. Feed port; 143. Second air passage cavity; 144. Air inlet; 15. Insertion rod; 151. First material passage cavity; 152. Material spraying hole; 153. First air passage cavity; 154. Air venting hole; 155. Spiral stirring blade; 16. First temperature sensor; 17. Gear ring; 2. Second positioning plate; 3. Supporting plate; 31. Second motor; 311. Third gear; 32. Buffer pad; 4. Counterweight. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0030] The embodiment of the present application discloses a coal spontaneous combustion prevention device for a coal yard.

[0031] Example

[0032] Reference Figure 1 A device for preventing and controlling coal spontaneous combustion in a coal yard comprises a first positioning plate 1 and a second positioning plate 2, wherein the first positioning plate 1 is arranged in parallel with the second positioning plate 2. The first positioning plate 1 is rotatably connected to a first gear 11, and a first motor 12 driving the first gear 11 to rotate is installed on the first positioning plate 1. A side of the first positioning plate 1 facing away from the second positioning plate 2 is rotatably connected to a supporting plate 3, and the first motor 12 is a servo motor, which can complete the forward and reverse operation of the motor output shaft.

[0033] Reference Figure 1 and Figure 2 The first positioning plate 1 is connected with three second gears 13 that rotate circumferentially along the first gear 11. The second gears 13 are all meshed with the first gear 11. The second gears 13 are all threadedly connected with screws 14, and the number of screws 14 is greater than or equal to three. The screws 14 are all passed through the first positioning plate 1 and fixedly connected with a plug rod 15. The end of the screw 14 that is away from the plug rod 15 is fixedly connected with the second positioning plate 2. The plug rod 15 is provided with a first temperature sensor 16. When the coal spontaneous combustion prevention device is in use, the plug rod 15 is inserted into the coal pile from the top of the coal pile. The plug rod 15 is inserted into the coal pile. The first temperature sensor 16 on the plug rod 15 detects the high temperature area inside the coal pile. The high temperature area is prone to coal spontaneous combustion. After the high temperature area is detected, the support plate 3 is placed on the surface of the coal pile. The high temperature area inside the coal pile is located below the first positioning plate 1. At this time, the lower end of the plug rod 15 is located inside the coal pile.

[0034] Reference Figure 1 and Figure 2 The operator starts the first motor 12, and the output shaft of the first motor 12 rotates to drive the first gear 11 to rotate. Under the meshing transmission of the second gear 13 and the first gear 11, the second gear 13 rotates. Under the limiting action of the second positioning plate 2, the screw 14 moves along its length direction, and the screw 14 drives the plunger 15 to move in the coal pile. The outer wall of the plunger 15 is fixedly connected with a spiral toggle leaf 155. When the plunger 15 is located in the coal pile and rotates, the spiral toggle leaf 155 rotates with the plunger 15 to toggle the coal on the moving path of the plunger 15, thereby ensuring that the moving path of the plunger 15 is unobstructed.

[0035] Reference Figure 2 and Figure 3, a first material feeding cavity 151 is formed inside the inserting rod 15, a second material feeding cavity 141 communicating with the corresponding first material feeding cavity 151 is formed in the screw rod 14, a feeding port 142 is arranged at one end of the screw rod 14 close to the second positioning plate 2, and a plurality of material spraying holes 152 are arranged on the inserting rod 15 in the circumferential direction. The material spraying holes 152 are all communicated with the first material feeding cavity 151. After the inserting rod 15 moves to the high-temperature area in the coal pile, the first motor 12 stops rotating. The operator connects the material pipe for conveying the coal spontaneous combustion prevention material with the feeding port 142 of the screw rod 14. Then, the coal spontaneous combustion prevention material flows through the second material feeding cavity 141 and the first material feeding cavity 151, and finally sprays out from the material spraying holes 152, spraying the coal spontaneous combustion prevention material on the high-temperature area in the coal pile, inhibiting the spontaneous combustion of the coal in the high-temperature area, avoiding the spontaneous combustion of the coal pile induced by local overheating, and improving the prevention effect of coal spontaneous combustion. At the same time, the operator can control the positive and reverse rotation of the output shaft of the first motor 12 to drive the inserting rod 15 to rotate and move up and down in the high-temperature area. During the movement, the material spraying holes 152 continuously spray out the coal spontaneous combustion prevention material, expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area, which is beneficial to improving the prevention effect of coal spontaneous combustion in the high-temperature area.

[0036] Refer to Figure 1 and Figure 2 , a second motor 31 is fixedly arranged on the supporting plate 3, and a third gear 311 is fixedly connected to the output end of the second motor 31. After the inserting rod 15 is inserted into the high-temperature area in the coal pile, the operator starts the second motor 31. The output shaft of the second motor 31 rotates to drive the third gear 311 to rotate. A toothed ring 17 meshing with the third gear 311 is fixedly connected to the first positioning plate 1 in the circumferential direction. Under the meshing transmission of the toothed ring 17 and the third gear 311, the first positioning plate 1 drives all the inserting rods 15 to rotate around the center of the first positioning plate 1, so that the inserting rods 15 rotate around the center of the first positioning plate 1 in the high-temperature area, and the rotation radius is the length from the center of the first positioning plate 1 to the inserting rod 15. During the rotation, the material spraying holes 152 continuously spray out the coal spontaneous combustion prevention material, further expanding the spraying range of the coal spontaneous combustion prevention material in the high-temperature area, which is beneficial to improving the prevention effect of coal spontaneous combustion in the high-temperature area.

[0037] Refer to Figure 1 and Figure 3The plug rod 15 has a first air cavity 153 formed inside, the screw rod 14 has a second air cavity 143 connected to the corresponding first air cavity 153, the screw rod 14 has an air inlet 144 at one end close to the second positioning plate 2, and the plug rod 15 has a plurality of air holes 154 formed along the circumference, and the air holes 154 are all connected to the first air cavity 153. The operator can connect the material pipe for conveying inert gas with the air inlet 144 of the screw rod 14, so that the inert gas flows through the second air cavity 143 and the first air cavity 153, and finally sprays out from the air holes 154, and the inert gas is introduced into the high temperature area in the coal pile, so as to reduce the oxygen concentration in the high temperature area and prevent the coal from spontaneous combustion, and further improve the prevention and control effect of the coal spontaneous combustion.

[0038] Reference Figure 1 and Figure 2 The surface of the coal pile is usually uneven, and a buffer pad 32 is fixedly connected to the lower end surface of the support plate 3. The buffer pad 32 has a certain elastic deformation ability. When the support plate 3 is placed on the surface of the coal pile, the buffer pad 32 is in full contact with the coal on the surface of the coal pile, which is beneficial to improve the stability of the support plate 3, thereby ensuring the stability of the coal spontaneous combustion prevention material during spraying, and is beneficial to improving the control effect of the high-temperature area in the coal pile.

[0039] Reference Figure 1 The first positioning plate 1 and the second positioning plate 2 are both fixedly connected with a plurality of counterweight blocks 4. The counterweight blocks 4 are provided to increase the overall weight of the coal spontaneous combustion prevention and control device, so that the first positioning plate 1 is not prone to shaking or deflecting when located on the surface of the coal pile, which is beneficial to improving the overall stability of the coal spontaneous combustion prevention and control device, ensuring the stability of the coal spontaneous combustion prevention material and the inert gas during ejection, and is beneficial to improving the effect of coal spontaneous combustion control in high-temperature areas.

[0040] Reference Figure 1 A plurality of second temperature sensors are provided at one end of the first positioning plate 1 away from the first gear 11. The second temperature sensors can detect the surface temperature of the coal pile. When it is detected that the surface temperature of a certain area of ​​the coal pile is high and there is a risk of coal spontaneous combustion, the coal spontaneous combustion prevention device can be placed above the area using lifting equipment, and the first motor 12 and the second motor 31 can be started. The coal spontaneous combustion prevention material can be sprayed through the spray hole 152 to treat the high-temperature area on the surface of the coal pile, thereby improving the versatility of the device.

[0041] The implementation principle of a device for preventing coal spontaneous combustion in a coal yard according to an embodiment of the present application is as follows: The insertion rod 15 is inserted into the coal pile from above the coal pile. The first temperature sensor 16 detects the high-temperature area inside the coal pile. After detecting the high-temperature area, the first positioning plate 1 is placed on the surface of the coal pile, and the first motor 12 is started. Under the meshing drive of the second gear 13 and the first gear 11, the screw rod 14 moves along its length direction. When the screw rod 14 moves, it drives the insertion rod 15 to move inside the coal pile. When the insertion rod 15 moves to the high-temperature area inside the coal pile, the first motor 12 stops rotating. The coal spontaneous combustion prevention material enters from the feed port 142, flows through the second material passage 141 and the first material passage 151, and finally sprays out from the spraying holes 152 to spray the coal spontaneous combustion prevention material on the high-temperature area inside the coal pile to inhibit the spontaneous combustion of coal in the high-temperature area; Inert gas is introduced from the gas inlet 144, and then the inert gas flows through the second gas passage 143 and the first gas passage 153 and sprays out from the ventilation holes 154 to introduce inert gas into the high-temperature area inside the coal pile; At the same time, the output shaft of the first motor 12 can rotate forward and backward to drive the insertion rod 15 to rotate and move up and down inside the high-temperature area. During the movement, the spraying holes 152 continuously spray the coal spontaneous combustion prevention material, and the ventilation holes 154 spray the inert gas, expanding the spraying range of the coal spontaneous combustion prevention material and the inert gas in the high-temperature area. Then, by starting the second motor 31, the rotation of the output shaft of the second motor 31 drives the third gear 311 to rotate. Under the meshing drive of the gear ring 17 and the third gear 311, the first positioning plate 1 drives all the insertion rods 15 to rotate around the center of the first positioning plate 1. During the rotation, the spraying holes 152 continuously spray the coal spontaneous combustion prevention material, and the ventilation holes 154 continuously spray the inert gas, further expanding the spraying range of the coal spontaneous combustion prevention material and the inert gas in the high-temperature area, which is beneficial to improving the effect of preventing coal spontaneous combustion in the high-temperature area.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A coal spontaneous combustion prevention device for a coal yard, comprising a first positioning plate (1) and a second positioning plate (2), characterized in that: The first positioning plate (1) is rotatably connected to a first gear (11), the first positioning plate (1) is fixedly provided with a first motor (12) for driving the first gear to rotate, the first positioning plate (1) is rotatably connected to a plurality of second gears (13) along the circumferential direction of the first gear (11), the second gears (13) are all meshed with the first gear (11), the second gears (13) are all threadedly connected to a screw rod (14), the screw rod (14) is all passed through the first positioning plate (1) and is fixedly connected to an insertion rod (15), the screw rod (14) is away from the insertion rod (15) One end of the screw rod (14) is fixedly connected to the second positioning plate (2), the insert rod (15) is provided with a first temperature sensor (16), a first material feeding cavity (151) is provided inside the insert rod (15), a second material feeding cavity (141) is provided on the screw rod (14) and is connected to the corresponding first material feeding cavity (151), a feed port (142) is provided on one end of the screw rod (14) close to the second positioning plate (2), and a plurality of injection holes (152) are provided on the insert rod (15) along the circumferential direction, and the injection holes (152) are all connected to the first material feeding cavity (151).

2. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 1, characterized in that: The first positioning plate (1) is rotatably connected to a support plate (3) at a side facing away from the second positioning plate (2); the support plate (3) is fixedly provided with a second motor (31); the output end of the second motor (31) is fixedly connected to a third gear (311); and the first positioning plate (1) is fixedly connected to a gear ring (17) meshing with the third gear (311) along the circumferential direction.

3. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 2, characterized in that: A buffer pad (32) is fixedly connected to the lower end surface of the supporting plate (3).

4. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 1, characterized in that: The insert rod (15) is provided with a first air cavity (153) inside, the screw rod (14) is provided with a second air cavity (143) connected to the corresponding first air cavity (153), an air inlet (144) is provided at one end of the screw rod (14) close to the second positioning plate (2), and the insert rod (15) is provided with a plurality of air holes (154) along the circumference, and the air holes (154) are all connected to the first air cavity (153).

5. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 1, characterized in that: The outer wall of the insert rod (15) is fixedly connected with a spiral toggling blade (155).

6. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 1, characterized in that: The first positioning plate (1) and the second positioning plate (2) are both fixedly connected with a plurality of counterweight blocks (4).

7. The device for preventing and controlling coal spontaneous combustion in a coal yard according to claim 1, characterized in that: A plurality of second temperature sensors are provided at one end of the first positioning plate (1) away from the first gear (11).

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