Coal mine goaf coal spontaneous combustion monitoring and early warning system based on intelligent control

Abstract

The invention relates to the technical field of monitoring and early warning, and discloses a coal mine goaf coal spontaneous combustion monitoring and early warning system based on intelligent control, the system comprises an alarm assembly and a mounting seat assembly, the alarm assembly is arranged in the middle of the top of the mounting seat assembly, the mounting seat assembly comprises a base, and an air pump assembly is arranged in the middle of the bottom of the base; according to the coal spontaneous combustion monitoring and early warning system, through linkage design of all the components, self-adaption to a severe environment is achieved; after primary dust removal is carried out by the filter screen plate, moisture in airflow is effectively adsorbed by the water absorption cotton plate fixed by the partition plate and the embedded groove, so that air is dried, and an internal sensor is protected; the key point lies in that the driving motor drives the mounting ring and the convex fins to slowly rotate through the synchronous belt group and the gear group, and periodically pushes the roller and the sliding seat, so that the water absorption cotton plate is extruded by the extrusion plate through the hinge rod, water is discharged through the limiting groove and the water outlet hole, and the moisture absorption performance of the water absorption cotton plate is automatically recovered.

Description

Technical Field

[0001] This invention relates to the field of monitoring and early warning technology, and more specifically, to a coal mine goaf monitoring and early warning system based on intelligent control. Background Technology

[0002] Spontaneous combustion of coal residue in goaf areas is one of the major underground disasters, and real-time and effective monitoring and early warning are crucial. Currently, monitoring systems based on multiple sensors are widely used to analyze changes in gas and temperature in the goaf area to warn of spontaneous combustion risks. These technologies provide core means for coal mine fire prevention and control, but their long-term operational stability faces severe challenges.

[0003] These systems are deployed in complex environments with high humidity and dust, facing two major practical challenges: First, a large amount of dust in the environment can easily adhere to and clog the air intake channels of sensors or the surface of sensitive elements, leading to distorted monitoring data or signal lag. Second, the high humidity air in the goaf can invade the equipment, not only interfering with the detection accuracy of gas sensors, but also accelerating the corrosion and aging of internal electronic components. These factors together weaken the accuracy and timeliness of early warning and significantly shorten the service life of the equipment.

[0004] Therefore, improving the environmental adaptability and autonomous maintenance capability of monitoring systems under harsh working conditions has become an urgent need for technological development. Traditional methods of regular manual cleaning and maintenance are inefficient and have safety blind spots. Developing an intelligent monitoring device that can automatically cope with dust blockage and moisture erosion is of great significance for achieving unmanned operation and reliable early warning. Summary of the Invention

[0005] To overcome the above-mentioned technical problems, this invention proposes a coal spontaneous combustion monitoring and early warning system based on intelligent control in coal mine goaf areas.

[0006] The present invention achieves the above objectives through the following technical solutions: A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control includes an alarm component and a mounting base component, wherein the alarm component is disposed in the middle of the top of the mounting base component; The mounting base assembly includes a base, and an air pump assembly is disposed in the middle of the bottom of the base. The air pump assembly includes an air collection chamber. The outer surface of the base is uniformly provided with filter screens, and the inner side of the base is provided with water absorption components near the filter screens, and the water absorption components include several sets of water absorption cotton boards. A squeezing mechanism is provided on the inner side of the base near the inner side of the absorbent board. The squeezing mechanism includes a squeezing plate for squeezing the absorbent board. A fan blade assembly is provided in the middle of the inner side of the base. The fan blade assembly includes a drive shaft connected to the bottom bearing inside the base. A fan blade assembly is provided on the top of the outer side of the drive shaft. The base has a drive component located at its bottom interior, surrounding the outer side of the drive shaft. The drive component includes a drive motor that is connected to the outer side of the drive shaft.

[0007] As a further optimization of the present invention, the internal components of the alarm assembly include a CO sensor, a controller, a fiber optic temperature sensor, a signal transmitter, and a central control unit.

[0008] As a further optimization of the present invention, the water-absorbing assembly further includes a partition plate disposed on the inner periphery of the base. The inner wall of the partition plate is provided with an embedding groove. The water-absorbing cotton board is embedded in the inner side of the embedding groove. The bottom of the base is uniformly provided with a limiting groove that engages with the bottom of the water-absorbing cotton board. The bottom of the limiting groove is uniformly provided with a water outlet hole extending to the bottom of the base. A transition cavity is provided between the filter screen plate and the partition plate.

[0009] As a further optimization of the present invention, a support frame is fastened to the upper part of the inner wall of the base, the bottom of the support frame is connected to the top of the partition, and humidity sensor assemblies are evenly arranged on the outer side of the support frame.

[0010] As a further optimization of the present invention, the air pump assembly also includes an air supply pipe surrounding the outside of the support frame, with nozzles evenly arranged on the outside of the air supply pipe facing the filter screen, and an air guide pipe extending to the bottom of the air supply pipe and communicating unidirectionally with the inside of the air collection chamber.

[0011] As a further optimization of the present invention, the outer side of the gas collection chamber is also connected to several sets of piston chambers in one direction. A piston plate is provided inside the piston chamber, and a connecting rod extending into the base is provided on one side of the piston plate. A displacement sliding hole adapted to the connecting rod is provided at the bottom of the base.

[0012] As a further optimization of the present invention, the extrusion mechanism further includes a sliding seat that is fastened to the top of the connecting rod. The sliding seat slides linearly at the bottom inside the base, and the bottom of the base is provided with a linear groove that is compatible with the sliding seat.

[0013] As a further optimization of the present invention, the sliding seat is symmetrically hinged with two sets of hinge rods on the side near the absorbent board, and the other ends of the two sets of hinge rods are hinged to a pressing plate. A spring is provided in the middle of the sliding seat near the pressing plate, and a baffle is provided at the other end of the spring and fastened to the bottom of the base. A roller is provided at the end of the sliding seat near the pressing plate.

[0014] As a further optimization of the present invention, the driving component includes a driving motor disposed at the bottom of the interior of the base, a synchronous belt assembly is disposed between the output end of the driving motor and the outer side of the transmission shaft, a first gear is disposed at the bottom of the outer side of the transmission shaft, an mounting ring is disposed around the outer side of the first gear at the bottom of the interior of the base, and an annular groove is disposed at the bottom of the base that is compatible with the mounting ring.

[0015] As a further optimization of the present invention, a toothed ring is provided on the inner side of the mounting ring, and a second gear is meshed between the first gear and the toothed ring, and the second gear is fastened to the bottom of the base. The outer side of the mounting ring is uniformly provided with convex fins that are adapted to the roller.

[0016] The beneficial effects of this invention are as follows: 1. This invention achieves autonomous adaptation to harsh environments through the coordinated design of various components. After initial dust removal by the filter screen, the moisture in the airflow is effectively absorbed by the absorbent cotton board fixed by the partition and the embedded groove, thereby drying the air and protecting the internal sensors. The key point is that the drive motor drives the mounting ring and convex fin to rotate slowly through the synchronous belt group and gear group, periodically pushing the roller and sliding seat, and then the extrusion plate squeezes the absorbent cotton board through the hinge rod, expelling the moisture through the limiting groove and the water outlet, automatically restoring its moisture absorption performance.

[0017] 2. This invention uses a squeezing action to link a piston plate with a connecting rod, enabling the air pump assembly to work synchronously. When the piston plate resets, it forces outside air into the air collection chamber, which is then sprayed out from the nozzle through the air delivery pipe, forming a reverse blowing airflow on the filter screen, automatically removing dust adhering to its surface and effectively preventing blockage. This self-cleaning and self-drying cycle, driven by the fan assembly and controlled by mechanical transmission, operates continuously without manual intervention, significantly ensuring the long-term working stability and data accuracy of the CO sensor and fiber optic temperature sensor inside the alarm assembly, and improving the reliability of the entire early warning system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the three-dimensional structure of the present invention; Figure 3 This is an enlarged sectional view of the internal component connection structure at the base of the present invention; Figure 4 This is an enlarged schematic diagram of the air pump assembly in this invention; Figure 5 This is an enlarged schematic diagram of the position and structure of the fan blade assembly and the extrusion mechanism in this invention; Figure 6 This is an enlarged schematic diagram of the installation structure at the absorbent board in this invention; Figure 7 This is an enlarged schematic diagram of the position and structure of the extrusion mechanism and driving component in this invention; Figure 8 This is an enlarged schematic diagram of the connection structure at the extrusion mechanism in this invention; Figure 9 This is an enlarged schematic diagram of the connection structure at the drive component in this invention; Figure 10 This is an enlarged schematic diagram of the internal structure of the base in this invention.

[0019] In the picture: 100. Alarm assembly; 200. Mounting base assembly; 300. Air pump assembly; 400. Humidity sensor assembly; 500. Fan assembly; 600. Pressing mechanism; 700. Drive component; 201. Base; 202. Water outlet; 203. Filter screen; 204. Transition chamber; 205. Partition; 206. Embedded groove; 207. Absorbent board; 208. Displacement sliding hole; 209. Annular sliding groove; 210. Straight sliding groove; 211. Limiting groove; 301. Gas collection chamber; 302. Gas guide pipe; 303. Piston chamber; 304. Gas delivery pipe; 305. Support frame; 306. Nozzle; 307. Connecting rod; 308. Piston plate; 501. Drive shaft; 502. Fan blade assembly; 601. Extrusion plate; 602. Sliding seat; 603. Hinge rod; 604. Spring; 605. Baffle; 606. Roller; 701. Mounting ring; 702. Drive motor; 703. Synchronous belt assembly; 704. Gear ring; 705. Protruding fin; 706. First gear; 707. Second gear. Detailed Implementation

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples. Example

[0021] like Figures 1 to 10 As shown, a coal spontaneous combustion monitoring and early warning system based on intelligent control in a coal mine goaf includes an alarm component 100 and a mounting base component 200, wherein the alarm component 100 is disposed in the middle of the top of the mounting base component 200. The mounting base assembly 200 includes a base 201, and an air pump assembly 300 is provided in the middle of the bottom of the base 201. The air pump assembly 300 includes an air collection chamber 301. The outer surface of the base 201 is uniformly provided with filter screens 203. A water-absorbing component is provided on the inner side of the base 201 near the filter screens 203, and the water-absorbing component includes several sets of water-absorbing cotton boards 207. A squeezing mechanism 600 is provided on the inner side of the base 201 near the inner side of the absorbent cotton board 207. The squeezing mechanism 600 includes a squeezing plate 601 that squeezes the absorbent cotton board 207. A fan blade assembly 500 is provided in the middle of the inner side of the base 201. The fan blade assembly 500 includes a drive shaft 501 connected to the bottom bearing inside the base 201. A fan blade assembly 502 is provided on the top of the outer side of the drive shaft 501. A drive component 700 is provided inside the bottom of the base 201 around the outside of the drive shaft 501. The drive component 700 includes a drive motor 702 that is connected to the outside of the drive shaft 501. The internal components of the alarm assembly 100 include a CO sensor, a controller, a fiber optic temperature sensor, a signal transmitter, and a central control unit. It should be noted that the internal components of the alarm assembly 100, including the CO sensor, controller, fiber optic temperature sensor, signal transmitter, and central control unit, are all existing technologies, and their working principles are consistent with existing technologies. They will not be described in detail here. The water absorption assembly also includes a partition 205 disposed on the inner periphery of the base 201. An embedding groove 206 is provided on the inner wall of the partition 205. The water-absorbing cotton board 207 is embedded in the inner side of the embedding groove 206. A limiting groove 211 is uniformly provided on the bottom of the base 201, which engages with the bottom of the water-absorbing cotton board 207. A water outlet hole 202 extending to the bottom of the base 201 is uniformly provided on the bottom of the limiting groove 211. A transition cavity 204 is provided between the filter screen 203 and the partition 205. A support frame 305 is fastened to the upper part of the inner wall of the base 201. The bottom of the support frame 305 is connected to the top of the partition 205. A humidity sensor assembly 400 is uniformly provided on the outer side of the support frame 305. The air pump assembly 300 also includes an air supply pipe 304 surrounding the outside of the support frame 305. Nozzles 306 facing the filter screen plate 203 are evenly arranged on the outside of the air supply pipe 304. The bottom of the air supply pipe 304 is provided with an air guide pipe 302 extending to the bottom of the base 201 and communicating unidirectionally with the inside of the air collection chamber 301. The outside of the air collection chamber 301 is also unidirectionally connected to several sets of piston chambers 303. A piston plate 308 is provided inside the piston chamber 303. A connecting rod 307 extending into the inside of the base 201 is provided on one side of the piston plate 308. A displacement sliding hole 208 that is compatible with the connecting rod 307 is provided at the bottom of the inside of the base 201. The extrusion mechanism 600 also includes a sliding seat 602 that is fastened to the top of the connecting rod 307. The sliding seat 602 slides linearly at the bottom inside the base 201. The bottom of the base 201 is provided with a linear groove 210 that is compatible with the sliding seat 602. Two sets of hinge rods 603 are symmetrically hinged on the side of the sliding seat 602 near the absorbent cotton board 207. The other ends of the two sets of hinge rods 603 are hinged to the extrusion plate 601. A spring 604 is provided in the middle of the sliding seat 602 near the extrusion plate 601. The other end of the spring 604 is provided with a baffle 605 that is fastened to the bottom of the base 201. A roller 606 is provided on the end of the sliding seat 602 that is close to the extrusion plate 601. The drive component 700 includes a drive motor 702 disposed inside the bottom of the base 201. The output end of the drive motor 702 and the outer side of the transmission shaft 501 are jointly provided with a synchronous belt group 703. A first gear 706 is disposed at the bottom of the outer side of the transmission shaft 501. An mounting ring 701 is disposed around the outer side of the first gear 706 at the bottom of the inside of the base 201. An annular groove 209 that is adapted to the mounting ring 701 is disposed at the bottom of the base 201. The inner side of the mounting ring 701 is provided with a toothed ring 704. The first gear 706 and the toothed ring 704 mesh together with the second gear 707, and the second gear 707 is fastened to the bottom of the base 201. The outer side of the mounting ring 701 is evenly provided with convex fins 705 that are compatible with the roller 606.

[0022] The usage process of the coal spontaneous combustion monitoring and early warning system based on intelligent control proposed in this embodiment is as follows: when the device is in use, the drive motor 702 is powered by an external power supply, and the electronic components inside the alarm component 100 are powered at the same time. By starting the drive motor 702, the transmission shaft 501 connected to the synchronous belt group 703 is driven to rotate. The rotation of the transmission shaft 501 drives the fan blade group 502 to rotate, and then the fan blade group 502 pushes the airflow inside the alarm assembly 100 and the base 201 to flow from bottom to top and is discharged from the top of the alarm assembly 100. External airflow enters the interior of the transition cavity 204 through the filter screen 203, and the filter screen 203 filters particulate impurities from the external airflow. The airflow entering the transition cavity 204 carries moisture, which is then monitored by the humidity sensor assembly 400 and fed back to the central control unit inside the alarm assembly 100. The airflow filtered by the filter screen 203 enters the interior of the absorbent cotton plate 207 through the partition 205, where the absorbent cotton plate 207 filters the moisture in the airflow. The filtered airflow reduces a large amount of dust and impurities, thereby reducing corrosion and damage to the internal electronic components of the alarm unit 100. As the drive shaft 501 rotates, it drives the first gear 706 to rotate. The rotation of the first gear 706 then drives the second gear 707 to rotate. The rotation of the second gear 707 further drives the mounting ring 701 connected to the gear ring 704 to rotate and displace inside the annular groove 209. Since the first gear 706 and the second gear 707 are small gear sets that drive the large gear set of the gear ring 704, the function of reducing the speed of the gear ring 704 is realized. By following the rotation of the mounting ring 701, the convex fin 705 is driven to follow the rotation. When the convex fin 705 rotates to be in contact with the roller 606, it will squeeze the roller 606 and make the roller 606 roll. The roller 606 is subjected to a squeezing force, which causes the connecting rod 307 and the hinge rod 603 to follow the displacement. The following displacement of the hinge rod 603 pushes the squeezing plate 601 to linearly displace and squeeze the inner side of the absorbent cotton plate 207, causing the absorbent cotton plate 207 to shrink outward. The outer side of the absorbent cotton plate 207 is blocked by the partition plate 205, thereby realizing the function of squeezing the water inside the absorbent cotton plate 207. This avoids the problem of the absorbent cotton plate 207 absorbing a large amount of water and reducing its water absorption function. The water squeezed by the absorbent cotton plate 207 is concentrated inside the limiting groove 211 and discharged from the inside of the base 201 through the water outlet 202. Furthermore, as the connecting rod 307 moves, it causes the piston plate 308 to move inside the piston chamber 303, thereby drawing airflow from the outside into the piston chamber 303. When the convex fin 705 rotates and no longer squeezes against the roller 606, the sliding seat 602 is reset under the action of the spring 604's rebound force, which in turn drives the squeezing plate 601 to reset, while the absorbent board 207 resets and expands under its own rebound force. Under the action of the connecting rod 307, the piston plate 308 moves in the opposite direction inside the gas collection chamber 301, transporting the gas inside the piston chamber 303 to the inside of the gas collection chamber 301, and then transporting it to the inside of the gas delivery pipe 304 through the air guide pipe 302. The gas is then sprayed out through the nozzle 306 on the outside of the gas delivery pipe 304. The sprayed airflow is opposite to the incoming airflow at the position of the filter screen plate 203, thereby blowing away the particulate impurities attached to the filter screen plate 203 in the opposite direction, realizing the function of automatic cleaning of the filter screen plate 203.

[0023] The specific implementation methods of the embodiments of the present invention have been described above. However, the embodiments of the present invention are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments of the present invention, all of which are within the protection scope of the embodiments of the present invention.

Claims

1. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control, characterized in that, It includes an alarm assembly (100) and a mounting base assembly (200), wherein the alarm assembly (100) is disposed in the middle of the top of the mounting base assembly (200); The mounting base assembly (200) includes a base (201), and an air pump assembly (300) is provided at the center of the bottom of the base (201). The air pump assembly (300) includes an air collection chamber (301). The outer surface of the base (201) is uniformly provided with filter screens (203), and a water-absorbing component is provided on the inner side of the base (201) near the filter screens (203), and the water-absorbing component includes several sets of water-absorbing cotton boards (207). A squeezing mechanism (600) is provided on the inner side of the base (201) near the inner side of the absorbent board (207). The squeezing mechanism (600) includes a squeezing plate (601) for squeezing the absorbent board (207). A fan blade assembly (500) is provided in the middle of the inner side of the base (201). The fan blade assembly (500) includes a drive shaft (501) connected to the bottom bearing inside the base (201). A fan blade assembly (502) is provided on the top of the outer side of the drive shaft (501). The base (201) has a drive component (700) arranged at the bottom inside, around the outside of the drive shaft (501). The drive component (700) includes a drive motor (702) that is connected to the outside of the drive shaft (501).

2. The coal spontaneous combustion monitoring and early warning system for goaf areas based on intelligent control according to claim 1, characterized in that, The alarm assembly (100) internally includes a CO sensor, a controller, a fiber optic temperature sensor, a signal transmitter, and a central control unit.

3. The coal spontaneous combustion monitoring and early warning system for goaf areas based on intelligent control according to claim 1, characterized in that, The water-absorbing assembly also includes a partition (205) disposed on the inner periphery of the base (201). An embedding groove (206) is provided on the inner wall of the partition (205). The water-absorbing cotton board (207) is embedded in the inner side of the embedding groove (206). A limiting groove (211) is uniformly provided on the bottom of the base (201) to engage with the bottom of the water-absorbing cotton board (207). A water outlet hole (202) extending to the bottom of the base (201) is uniformly provided on the bottom of the limiting groove (211). A transition cavity (204) is provided between the filter screen (203) and the partition (205).

4. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 3, characterized in that, A support frame (305) is fastened to the upper part of the inner wall of the base (201). The bottom of the support frame (305) is connected to the top of the partition (205). Humidity sensor assemblies (400) are evenly arranged on the outer side of the support frame (305).

5. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 1, characterized in that, The air pump assembly (300) also includes an air supply pipe (304) surrounding the outside of the support frame (305). The outside of the air supply pipe (304) is uniformly provided with nozzles (306) facing the filter screen (203). The bottom of each air supply pipe (304) is provided with an air guide pipe (302) extending to the bottom of the base (201) and communicating unidirectionally with the inside of the air collection chamber (301).

6. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 5, characterized in that, The outer side of the gas collection chamber (301) is also connected to several sets of piston chambers (303) in one direction. The piston chamber (303) is provided with a piston plate (308). A connecting rod (307) extending into the base (201) is provided on one side of the piston plate (308). A displacement sliding hole (208) that is compatible with the connecting rod (307) is provided at the bottom of the base (201).

7. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 6, characterized in that, The extrusion mechanism (600) also includes a sliding seat (602) that is fastened to the top of the connecting rod (307). The sliding seat (602) slides linearly at the bottom inside the base (201). The bottom of the base (201) is provided with a linear groove (210) that is compatible with the sliding seat (602).

8. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 7, characterized in that, The sliding seat (602) is symmetrically hinged with two sets of hinge rods (603) on the side near the absorbent board (207). The other ends of the two sets of hinge rods (603) are hinged to a pressing plate (601). A spring (604) is provided in the middle of the sliding seat (602) near the pressing plate (601). The other end of the spring (604) is provided with a baffle (605) that is fastened to the bottom of the base (201). A roller (606) is provided at the end of the sliding seat (602) away from the pressing plate (601).

9. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 8, characterized in that, The drive component (700) includes a drive motor (702) disposed at the bottom inside the base (201). A synchronous belt assembly (703) is disposed between the output end of the drive motor (702) and the outer side of the transmission shaft (501). A first gear (706) is disposed at the bottom outside the transmission shaft (501). An mounting ring (701) is disposed around the outer side of the first gear (706) at the bottom inside the base (201). An annular groove (209) that is adapted to the mounting ring (701) is disposed at the bottom of the base (201).

10. A coal mine goaf spontaneous combustion monitoring and early warning system based on intelligent control according to claim 9, characterized in that, The inner side of the mounting ring (701) is provided with a toothed ring (704), and the first gear (706) and the toothed ring (704) are meshed together with a second gear (707), and the second gear (707) is fastened to the bottom of the base (201). The outer side of the mounting ring (701) is evenly provided with convex fins (705) that are compatible with the roller (606).

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