Intelligent mine dust concentration monitoring and dust reduction device

Abstract

The application discloses a kind of intelligent mine dust concentration monitoring dust-settling device, and the application relates to the technical field of mine dust prevention and control;Including: dust concentration detection device, dust suction pipe, purification tank;The structure design of the present application is arranged in two different diameter pipelines using double dust sensors, which effectively overcomes the signal drift defect caused by lens surface dust adhesion in traditional monitoring device.The design can distinguish the false signal caused by lens pollution from the real dust concentration exceeding standard through signal comparison in different pipeline environments, thereby fundamentally eliminating the false start of negative pressure dust suction device.This improvement not only significantly reduces the idle loss and power waste of equipment under unnecessary working conditions, but also eliminates the interference of false alarm on normal production process, effectively guarantees the continuity and stability of mine roadway operation.

Description

Technical Field

[0001] This invention relates to the field of dust control technology in mines, and in particular to an intelligent dust concentration monitoring and dust reduction device for mines. Background Technology

[0002] Maintaining a clean air environment is crucial for ensuring the normal operation of equipment and the respiratory safety of personnel during production operations in mine tunnels. Existing dust monitoring devices primarily use dust concentration sensors as the core feedback element. Their operating logic involves capturing changes in the density of suspended particulate matter in the air in real time and converting them into continuous electrical signals. When the concentration value detected by the sensor exceeds a preset safety threshold, the system immediately activates the actuator, driving the negative pressure dust collection device to start working. This device uses a motor to drive a fan to rotate at high speed, creating an instantaneous vacuum environment within a sealed housing. Utilizing the negative pressure difference generated inside and outside, dust-laden air in the tunnel is forcibly drawn into the dust collection chamber through the suction pipe, thereby forcibly purifying the local environment and forming a closed-loop control process of "detection-response-purification".

[0003] However, traditional monitoring devices suffer from technical flaws in practical applications, namely frequent false alarms. Because sensors are constantly exposed to harsh conditions with high dust levels, the probes are easily covered in dust, causing inaccurate signal deviations. Even if the dust concentration in the environment does not exceed the standard, the sensor may output abnormally high signals. These false signals can directly trigger the false activation of the negative pressure dust collection device, resulting not only in unnecessary energy and equipment consumption but, more seriously, disrupting normal production processes. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides an intelligent dust concentration monitoring and dust suppression device for mines. It employs a dual dust sensor detection scheme, deploying two sensors in pipes of different diameters to monitor dust concentration in the tunnel in real time. In terms of control logic, a dual verification mechanism is used: if only one sensor is triggered, it is considered a false alarm, and the sensor lens is cleaned; only when both sensors are triggered simultaneously is it determined that the dust concentration in the tunnel exceeds the standard, and a forced purification mode is immediately activated.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A smart dust concentration monitoring and dust suppression device for mines includes: a dust concentration detection device, a dust suction pipe, and a purification tank; the purification tank, the dust concentration detection device, and the dust suction pipe are interconnected.

[0007] The dust concentration detection device includes a first dust inlet pipe and a second dust inlet pipe that are interconnected; the diameter of the second dust inlet pipe is larger than that of the first dust inlet pipe; a first dust sensor and a second dust sensor are respectively installed inside the first dust inlet pipe and the second dust inlet pipe.

[0008] A dust inlet is provided at one end of the first dust inlet pipe, and a return pipe is provided below the dust inlet pipe. A valve is installed inside the return pipe, which is connected to the purification tank. An air passage regulating plate is slidably installed inside the first dust inlet pipe. A drive mechanism controls the air passage regulating plate to move up and down, and adjusts the opening and closing state of the dust inlet and the connection state between the return pipe and the first dust inlet pipe through the lifting and lowering action. When the first dust sensor and the second dust sensor are triggered, the drive mechanism is controlled to act. When the dust inlet is open, the first dust sensor and the second dust sensor detect the dust concentration. When the return pipe is connected to the first dust inlet pipe, it cleans the first dust sensor and the second dust sensor.

[0009] In one embodiment, in order to achieve synchronous operation of the first dust sensor and the second dust sensor under dust exceeding the standard, the preset trigger thresholds of the two are set differently, that is, the trigger threshold of the first dust sensor is set to be lower than the trigger threshold of the second dust sensor.

[0010] In one embodiment, the air passage regulating plate has a first opening and a second opening; a sliding plate is slidably disposed at the lower end of the air passage regulating plate, the sliding plate being an inverted "L" shape; a support plate is slidably disposed on the opposite side of the sliding plate, the support plate also being an inverted "L" shape; the horizontal section of the sliding plate overlaps the top surface of the horizontal section of the support plate; the bottom surface of the horizontal section of the sliding plate is an inclined slope; a limiting plate is disposed on the vertical section of the sliding plate, the upper end of the limiting plate having a first groove, the bottom surface of the first groove being a slope.

[0011] In one embodiment, the driving mechanism employs an electric slide rail. A first slider on the electric slide rail meshes with a screw. A second slider is connected to the top surface of the first slider via a support spring for transmission of the second slider. The first slider is connected to an abutment rod via a hydraulic spring. A guide block is provided on one side of the upper end of the electric slide rail. The lower end of the guide block is sloped. The abutment rod abuts against the slope of the guide block, and the hydraulic spring is in a stretched state. The abutment rod is vertically slidably connected to the assembly rod, and the second slider is horizontally slidably connected to the assembly rod. A first sliding post is provided at the end of the assembly rod. The abutment rod drives the first sliding post at the end of the assembly rod to be located on one side of the top surface of the first groove. The rigidity of the support spring is greater than the total weight of the air circuit adjusting plate, the sliding plate, and the limiting plate.

[0012] In one embodiment, when the first dust sensor is triggered, the microcontroller controls the movement of the electric slide rail, and the first slider drives the second slider to slowly descend a certain distance; this is the cleaning mode. When both the first and second dust sensors are triggered within a certain time period, the microcontroller controls the movement of the electric slide rail, and the first slider drives the second slider to quickly descend a certain distance; this is the purification mode. In the cleaning mode, the descent distance of the first and second sliders is less than that in the purification mode.

[0013] In one embodiment, the valve is provided with a first air port and a second air port; the return pipe is provided with an exhaust pipe and a branch pipe, the branch pipe is divided into two air paths, the two air paths are respectively facing the lenses of the first dust sensor and the second dust sensor; one end of the valve is provided with an extension section, the end of the extension section is conical and extends into the first dust inlet pipe, and the air path regulating plate presses down the extension section to move the valve.

[0014] In one embodiment, multiple air inlets of the vacuum cleaner are respectively provided with sealing plates via a series shaft; a connecting rod is horizontally slidably connected to the top surface of the vacuum cleaner; a second groove is provided at one end of the connecting rod, and the bottom surface of the groove is designed as a slope; the other end of the connecting rod is slidably connected to a vertically downward track on the series shaft; a transmission rod is also vertically slidably connected to the top surface of the vacuum cleaner, and a second sliding post is provided at the lower end of the transmission rod, which is fitted into the second groove of the connecting rod; a lower pressure plate is provided on the first slider, and the lower pressure plate corresponds to the upper end of the transmission rod.

[0015] In one embodiment, an air intake fan is provided on the top surface of the purification tank, the outlet end of the air intake fan is connected to a return pipe, a cylindrical filter screen is provided inside the purification tank, the lower end of the filter screen is rotatably connected to the mounting base, the air intake fan drives the filter screen, and the air intake end of the air intake fan is connected to an air guide pipe, which extends downward and penetrates into the interior of the filter screen; the air guide pipe is located on a section of the pipe wall inside the filter screen, and an opening is provided on the side facing the connection between the air intake pipe and the purification tank; multiple scrapers are provided on one side of the filter screen.

[0016] In one embodiment, the intake fan drives the filter screen in the following manner: a rotating shaft is fixedly installed on the axis of the filter screen; the upper end of the rotating shaft extends upward and is connected to the motor shaft of the intake fan; the lower end of the rotating shaft is connected to a gear via a belt; the gear meshes with a gear ring, and the gear ring is fixed to the filter screen.

[0017] The beneficial effects of this invention are as follows:

[0018] (1) This invention employs a structural design in which dual dust sensors are respectively installed in two pipes of different diameters, effectively overcoming the signal drift defect caused by dust adhesion on the lens surface of traditional monitoring devices. This design, through signal comparison under differentiated pipe environments, can distinguish between true dust concentration exceeding the standard and false signals caused by lens contamination, thereby fundamentally eliminating the false start of the negative pressure dust collection device. This improvement not only significantly reduces the idling loss and energy waste of the equipment under unnecessary operating conditions, but also eliminates the interference of false alarms on the normal production process, effectively ensuring the continuity and stability of mine roadway operations.

[0019] (2) By setting a single electric slide rail as the core driving component, the present invention can realize the switching of the air path, thereby realizing the self-cleaning operation of the first dust sensor and the second dust sensor; in addition, the electric slide rail can also drive multiple sealing plates to flip to open multiple ventilation openings, thereby improving the airflow exchange efficiency during ventilation and dust removal.

[0020] (3) This invention achieves efficient self-cleaning of the filter screen by setting a cylindrical filter screen driven by an air intake fan inside the purification tank and cooperating with a special scraper structure. During the rotation of the filter screen, the surface of the filter screen is scraped off in real time by a fixed scraper, which effectively avoids the long-term adhesion and accumulation of dust on the filter screen, thereby preventing filter clogging. This not only ensures the continuous high efficiency of air purification, but also significantly extends the service life of the filter screen. In addition, the gear and gear ring speed reduction transmission ensures that the filter screen rotates stably at low speed, avoiding the risk of mechanical damage caused by high speed operation and improving the overall operational reliability of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the dust concentration detection device of the present invention;

[0023] Figure 3 This is a schematic diagram of the air path regulating plate structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the drive mechanism structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the valve structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the downward movement of the drive mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the downward movement of the air path regulating plate of the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the vacuum tube of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the purification tank of the present invention;

[0030] Figure 10 This is a top view of the interior of the purification tank of the present invention.

[0031] In the diagram: 100, Dust concentration detection device; 1-1, First dust sensor; 1-2, Second dust sensor; 200, Suction pipe; 300, Purification tank; 101, First dust inlet pipe; 102, Second dust inlet pipe; 103, Assembly housing; 110, Dust inlet; 201, Connecting pipe; 301, Air inlet pipe; 302, Return pipe; 303, Air intake fan; 304, Mounting base; 321, Exhaust pipe; 322, Branch pipe; 1, Air path regulating plate; 11, First opening; 12, Second opening; 13, Sliding plate; 131, Spring rod; 14, Support plate; 15, Limiting plate; 151 1. First groove; 4. Drive mechanism; 41. Electric slide rail; 42. First slider; 421. Hydraulic spring; 422. Abutment rod; 43. Second slider; 44. Support spring; 45. First sliding column; 451. Assembly rod; 46. Guide block; 47. Lower pressure plate; 2. Valve; 21. First air port; 22. Second air port; 23. Extension section; 20. Return spring; 5. Sealing plate; 51. Connecting shaft; 52. Track; 53. Connecting rod; 531. Second groove; 54. Transmission rod; 6. Filter screen; 60. Rotating shaft; 61. Gear ring; 62. Gear; 7. Air guide pipe; 8. Scraper. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0033] First embodiment:

[0034] Please see Figure 1 The present invention discloses an intelligent dust concentration monitoring and dust suppression device for mines, comprising: a dust concentration detection device 100, a dust suction pipe 200, and a purification tank 300;

[0035] Please see Figure 1 The dust concentration detection device 100 is located directly above the dust suction pipe 200, and both are fixedly installed on the side wall of the tunnel. The dust suction pipe 200 is connected to the dust concentration detection device 100 through the connecting pipe 201. The purification tank 300 is connected to the dust concentration detection device 100 and the dust suction pipe 200 through the air inlet pipe 301 and the return pipe 302, respectively.

[0036] Please see Figure 2The dust concentration detection device 100 includes a first dust inlet pipe 101, a second dust inlet pipe 102, and an assembly housing 103; the first dust inlet pipe 101 and the second dust inlet pipe 102 are coaxially arranged, and the diameter of the second dust inlet pipe 102 is larger than that of the first dust inlet pipe 101; a first dust sensor 1-1 and a second dust sensor 1-2 are respectively vertically arranged on the inner top surface of the first dust inlet pipe 101 and the second dust inlet pipe 102.

[0037] A dust inlet 110 is provided at one end of the first dust inlet pipe 101. Below the dust inlet 110 is the connection point between the return pipe 302 and the first dust inlet pipe 101, and a valve 2 is provided in the connection point. An air passage regulating plate 1 is slidably arranged inside the first dust inlet pipe 101, and the lower end of the air passage regulating plate 1 extends into the assembly housing 103. A drive mechanism 4 is provided in the assembly housing 103. The drive mechanism 4 is used to control the air passage regulating plate 1 to move up and down, and adjust the opening and closing state of the dust inlet 110 and the connection state between the return pipe 302 and the first dust inlet pipe 101 through the up and down movement. The end of the second dust inlet pipe 102 is connected to the connecting pipe 201.

[0038] The first dust inlet pipe 101 and the second dust inlet pipe 102 are designed with different diameters, and the first dust sensor 1-1 and the second dust sensor 1-2 are respectively built into them; the core purpose of this differentiated design is to use the difference in pipe cross-sectional area to make the local concentration of dust in the first dust inlet pipe 101 and the second dust inlet pipe 102 different, thereby artificially creating a pollution rate environment with two sensor optical lenses that are completely different.

[0039] Specifically, because the diameter of the first dust inlet pipe 101 is smaller, its internal airflow velocity is faster under the same suction conditions. The dust particles it carries attach to the optical lens of the first dust sensor 1-1 more frequently, resulting in a significantly faster dust accumulation rate on its lens than that of the second dust sensor 1-2, which is in a larger diameter environment. Based on this physical characteristic, the status of the sensors can be accurately identified: if only the first dust sensor 1-1 is triggered while the second dust sensor 1-2 is not triggered, it can be determined that the abnormality is due to a false alarm of optical scattering caused by excessively rapid dust accumulation on the lens of the first dust sensor 1-1. Only when the two sensors in different pollution rate environments are triggered simultaneously will the system confirm that the actual dust concentration in the tunnel exceeds the standard.

[0040] To achieve synchronized operation of the first dust sensor 1-1 and the second dust sensor 1-2 under dust exceeding the standard, this invention differentiates the preset trigger thresholds for both. Specifically, the first dust sensor 1-1 is located inside the first dust inlet pipe 101. Due to the small cross-sectional area of ​​the fluid channel at this location, the internal airflow velocity is high under constant exhaust flow, resulting in a relatively concentrated dust particle density per unit volume. This leads to a 'gain effect' between the reading detected by the first dust sensor 1-1 and the actual environmental concentration. Conversely, the second dust sensor 1-2 is located inside the second dust inlet pipe 102. Due to the increased cross-sectional area of ​​the flow channel, the airflow velocity is reduced, and the dust distribution is more sparse, resulting in a relatively flat reading. Based on these fluid dynamic differences, the trigger threshold of the first dust sensor 1-1 is set to be lower than that of the second dust sensor 1-2, avoiding control misjudgments caused by the flow channel differences.

[0041] Please see Figure 3 The air passage regulating plate 1 has a first opening 11 and a second opening 12. In the initial state, the first opening 11 is connected to the dust inlet 110. The lower end of the air passage regulating plate 1 is located inside the assembly housing 103, and a sliding plate 13 is horizontally slidably arranged inside the assembly housing 103. The sliding plate 13 is inverted "L" shape, and a spring rod 131 is arranged between the sliding plate 13 and the air passage regulating plate 1. A support plate 14 is arranged on the opposite side of the sliding plate 13. The support plate 14 is... The slide plate is in the shape of an inverted "L" and is horizontally slidably connected to the assembly housing 103. An elastic element is provided at the sliding connection. The horizontal section of the slide plate 13 overlaps the top surface of the horizontal section of the support plate 14, thereby supporting the air passage regulating plate 1 through the slide plate 13. The bottom surface of the horizontal section of the slide plate 13 is an inclined slope. A limiting plate 15 is provided on the vertical section of the slide plate 13. The upper end of the limiting plate 15 is provided with a first groove 151, and the bottom surface of the first groove 151 is sloping.

[0042] Please see Figure 4The drive mechanism 4 adopts an electric slide rail 41. The first slider 42 on the electric slide rail 41 meshes with the screw to achieve a transmission connection. The top surface of the first slider 42 is connected to the second slider 43 through a support spring 44, and the second slider 43 is nested on the screw. The screw does not generate a transmission effect on the second slider 43. The first slider 42 is connected to the abutment rod 422 through a hydraulic spring 421. The top surface of the assembly housing 103 is provided with a guide block 46. The lower end of the guide block 46 is sloping. In the initial state, the upper end of the abutment rod 422 abuts against the slope of the guide block 46, and the hydraulic spring 421 is in a stretched state. The abutment rod 422 is vertically slidably connected to the assembly rod 451, and the second slider 43 is horizontally slidably connected to the assembly rod 451; the end of the assembly rod 451 is provided with a first sliding post 45. In the initial state, the abutment rod 422 drives the first sliding post 45 at the end of the assembly rod 451 to be located on one side of the top surface of the first groove 151; the rigidity of the support spring 44 is greater than the total weight of the air passage adjustment plate 1, the sliding plate 13 and the limiting plate 15.

[0043] When the first dust sensor 1-1 is triggered, the microcontroller controls the movement of the electric slide rail 41, causing the first slider 42 to slowly descend the second slider 43 a certain distance; this is the cleaning mode. When both the first dust sensor 1-1 and the second dust sensor 1-2 are triggered within a certain time period (e.g., a three-second interval), the microcontroller controls the movement of the electric slide rail 41, causing the first slider 42 to quickly descend the second slider 43 a certain distance; this is the purification mode. In the cleaning mode, the descent distance of the first slider 42 and the second slider 43 is less than that in the purification mode. In the cleaning mode, the lenses of the first dust sensor 1-1 and the second dust sensor 1-2 are cleaned by air intake blowing.

[0044] Please see Figure 5 The valve 2 is provided with a first air port 21 and a second air port 22 respectively; the return pipe 302 is provided with an exhaust pipe 321 and a branch pipe 322, the branch pipe 322 is divided into two air paths, the two air paths are respectively facing the lenses of the first dust sensor 1-1 and the second dust sensor 1-2; in the initial state, the second air port 22 corresponds to the exhaust pipe 321, and the first air port 21 and the branch pipe 322 are intersected; one end of the valve 2 is provided with an extension section 23, the end of the extension section 23 is tapered, and extends into the first dust inlet pipe 101 and passes through the second opening 12 of the air path adjusting plate 1; the reset spring 20 is used for the reset action of the valve 2;

[0045] Working principle of this invention:

[0046] During routine testing, a weak negative pressure suction force is generated inside the purification tank 300. Air carrying dust from the tunnel enters through the dust inlet 110, flows sequentially through the first dust inlet pipe 101 and the second dust inlet pipe 102, then enters the suction pipe 200 through the connecting pipe 201, and finally enters the purification tank 300 through the air inlet pipe 301. After purification within the purification tank 300, the air flows out along the return pipe 302 and is finally discharged through the exhaust pipe 321. During this process, the first dust sensor 1-1 and the second dust sensor 1-2 detect the dust concentration in the air in real time.

[0047] As the detection time progresses, dust will gradually accumulate on the lens surfaces of the first dust sensor 1-1 and the second dust sensor 1-2. Since the diameter of the first dust inlet pipe 101 is smaller than that of the second dust inlet pipe 102, the local dust concentration per unit volume in the first dust inlet pipe 101 is higher, resulting in a greater amount of dust adhering to the lens of the first dust sensor 1-1 than that of the second dust sensor 1-2. Therefore, when the dust content in the tunnel is at the normal threshold, the first dust sensor 1-1 will be the first to be falsely triggered. By setting a delay through a time relay, if the second dust sensor 1-2 is not triggered within three seconds, the microcontroller will control the electric slide rail 41 to move and start the cleaning mode.

[0048] Please see Figure 6-7 When the electric slide rail 41 is activated, the first slider 42 drives the second slider 43 to move slowly downwards, and the abutment rod 422 moves downwards synchronously with the first sliding column. At this time, the abutment rod 422 separates from the guide block 46, the hydraulic spring 421 resets, and drives the first sliding column 45 to insert into the first groove 151. Then, the first sliding column 45 presses down on the slope of the first groove 151, driving the sliding plate 13 to move horizontally and separate from the support plate 14. Under the action of gravity, the air passage regulating plate 1 moves downwards until the first sliding column 45... The top surface of the first groove 151 is fitted; the air path regulating plate 1 moves down to block the dust inlet 110, and at the same time it presses down on the end of the extension section 23 of the valve 2, forcing the valve 2 to move horizontally, so that the first air port 21 corresponds to the branch pipe 322, and the second air port 22 is staggered with the exhaust pipe 321, thereby changing the air flow direction; at this time, the purification tank 300 increases the negative pressure suction force, and the purified air blows along the branch pipe 322 to the lenses of the first dust sensor 1-1 and the second dust sensor 1-2;

[0049] After a preset cleaning time, the electric slide rail 41 performs a reset action. The first slider 42 drives the second slider 43 to move upward, and through the first sliding column 45, it drives the air path adjustment plate 1 to rise until it returns to its initial state. During this process, the horizontal section of the sliding plate 13 abuts against the bottom surface of the horizontal section of the support plate 14, causing the support plate 14 to avoid contact. After the support plate 14 resets, it supports the sliding plate 13 (i.e., the air path adjustment plate 1) again. Simultaneously, the second slider 43 rises to its maximum height, and the first slider 42 continues to rise and compresses the support spring 44, causing the upper end of the abutment rod 422 to abut against the slope of the guide block 46 again, thereby causing the first sliding column 45 to separate from the first groove 151, completing the cleaning operation of the lenses of the first dust sensor 1-1 and the second dust sensor 1-2.

[0050] Second embodiment:

[0051] In purification mode, the system opens multiple air inlets on the suction pipe 200 to collect and purify dust in the alleyway; the specific structure of the suction pipe 200 is as follows:

[0052] Please see Figure 8 The vacuum pipe 200 has multiple air inlets with sealing plates 5 connected by a series shaft 51. When the series shaft 51 rotates, it can drive the multiple sealing plates 5 to rotate synchronously, thereby opening or closing the air inlets.

[0053] A connecting rod 53 is horizontally slidably connected to the top surface of the suction pipe 200; a second groove 531 is provided at one end of the connecting rod 53, and the bottom surface of the groove is designed as a slope; the other end of the connecting rod 53 is slidably connected to the vertically downward track 52 on the connecting shaft 51; in addition, a transmission rod 54 is vertically slidably connected to the top surface of the suction pipe 200, the upper end of the transmission rod 54 extends into the interior of the assembly housing 103, and a second sliding post is provided at its lower end, which is fitted into the second groove 531 of the connecting rod 53; a lower pressure plate 47 is provided on the first slider 42, and the lower pressure plate 47 corresponds to the upper end of the transmission rod 54.

[0054] Working principle of this invention:

[0055] When the dust concentration in the tunnel exceeds the standard, the first dust sensor 1-1 is triggered. If the second dust sensor 1-2 is triggered within three seconds, the system will immediately start the purification mode.

[0056] At this time, the electric slide rail 41 is activated, causing the first slider 42 and the second slider 43 to move downwards rapidly, and the abutment rod 422 moves downwards synchronously with the first sliding column. During this process, the abutment rod 422 separates from the guide block 46; because the hydraulic spring 421 drives the abutment rod 422 to reset slowly, the first sliding column 45 skips the first groove 151 before being inserted into it, and finally fits against the lower end of the limiting plate 15.

[0057] Next, the lower pressure plate 47 presses down on the transmission rod 54. The second sliding column of the transmission rod 54 acts on the slope of the second groove 531, driving the connecting rod 53 to slide. The connecting rod 53 pulls the connecting shaft 51 to rotate via the rail 52. The connecting shaft 51 then drives the sealing plate 5 to flip, thereby opening the air inlet of the dust suction pipe 200. At this time, the purification tank 300 increases the negative pressure suction force, efficiently sucking dust from the air through multiple air inlets to purify the alleyway environment. After the preset purification time, the electric slide rail 41 performs a reset action.

[0058] Third embodiment:

[0059] During the long-term air purification process of the purification canister 300, a large amount of dust easily accumulates on the surface of its internal filter, leading to filter blockage and severely affecting the air purification effect. Therefore, the filter 6 inside the purification canister 300 is specially designed with a self-cleaning function.

[0060] Please see Figure 9-10 The purification tank 300 has an air intake fan 303 on its top surface, and the air outlet of the air intake fan 303 is connected to a return pipe 302. A cylindrical filter screen 6 is installed inside the purification tank 300, and its lower end is rotatably connected to a mounting base 304. The air intake fan 303 can drive the filter screen 6 to rotate. Specifically, a rotating shaft 60 is fixedly installed at the axis of the filter screen 6. The upper end of the rotating shaft 60 extends upward and connects to the motor shaft of the air intake fan 303; the lower end of the rotating shaft 60 is connected to a gear 62 via a belt drive. The gear 62 meshes with a gear ring 61, and the gear ring 61 is fixedly connected to the filter screen 6. This gear 62 and gear ring 61 transmission method aims to keep the rotational speed of the filter screen 6 lower than that of the air intake fan 303, thereby effectively preventing mechanical damage to the filter screen 6 due to high-speed rotation.

[0061] The intake end of the air intake fan 303 is connected to an air guide pipe 7, which extends downward and penetrates into the filter screen 6. The air guide pipe 7 is located on a section of the pipe wall inside the filter screen 6, and has an opening on the side facing the connection between the air intake pipe 301 and the purification tank 300. Based on the air flow path, one side of the filter screen 6 is responsible for air filtration, while the other side performs self-cleaning operations simultaneously. Multiple scrapers 8 are provided on the self-cleaning side of the filter screen 6. When the filter screen 6 rotates, the multiple scrapers 8 can continuously scrape and clean the inner wall of the filter screen 6 to ensure the filtration effect.

Claims

1. An intelligent dust concentration monitoring and dust suppression device for mines, comprising: A dust concentration detection device (100), a suction pipe (200), and a purification tank (300); characterized in that: the purification tank (300), the dust concentration detection device (100), and the suction pipe (200) are interconnected; the dust concentration detection device (100) includes a first dust inlet pipe (101) and a second dust inlet pipe (102) that are interconnected; the diameter of the second dust inlet pipe (102) is larger than that of the first dust inlet pipe (101); a first dust sensor (1-1) and a second dust sensor (1-2) are respectively installed inside the first dust inlet pipe (101) and the second dust inlet pipe (102); One end of the first dust inlet pipe (101) is provided with a dust inlet (110), and a return pipe (302) is provided below the dust inlet (110). A valve (2) is provided inside the return pipe (302), and the return pipe (302) is connected to the purification tank (300). An air path regulating plate (1) is slidably provided inside the first dust inlet pipe (101). The drive mechanism (4) controls the air path regulating plate (1) to move up and down, and adjusts the opening and closing state of the dust inlet (110) by the lifting and lowering action. 02) The connection state with the first dust inlet pipe (101); when the first dust sensor (1-1) and the second dust sensor (1-2) are triggered, the control drive mechanism (4) is activated; when the dust inlet (110) is opened, the first dust sensor (1-1) and the second dust sensor (1-2) detect the dust concentration, and when the return pipe (302) is connected to the first dust inlet pipe (101), the first dust sensor (1-1) and the second dust sensor (1-2) are cleaned.

2. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that: To achieve synchronous operation of the first dust sensor (1-1) and the second dust sensor (1-2) under dust exceeding the standard, the preset trigger thresholds of the two are set differently, that is, the trigger threshold of the first dust sensor (1-1) is set to be lower than the trigger threshold of the second dust sensor (1-2).

3. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that: The air passage regulating plate (1) has a first opening (11) and a second opening (12); a sliding plate (13) is slidably provided at the lower end of the air passage regulating plate (1), and the sliding plate (13) is in the shape of an inverted "L"; a support plate (14) is slidably provided on the opposite side of the sliding plate (13), and the support plate (14) is also in the shape of an inverted "L"; the horizontal section of the sliding plate (13) overlaps the top surface of the horizontal section of the support plate (14); the bottom surface of the horizontal section of the sliding plate (13) is an inclined slope; a limiting plate (15) is provided on the vertical section of the sliding plate (13), and a first groove (151) is provided at the upper end of the limiting plate (15), and the bottom surface of the first groove (151) is a slope.

4. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that: The drive mechanism (4) adopts an electric slide rail (41). The first slider (42) on the electric slide rail (41) meshes with the screw. The top surface of the first slider (42) is connected to the second slider (43) through a support spring (44) to drive the second slider (43). The first slider (42) is connected to the abutment rod (422) through a hydraulic spring (421). A guide block (46) is provided on one side of the upper end of the electric slide rail (41). The lower end of the guide block (46) is sloped. The abutment rod (422) abuts against the slope of the guide block (46), and the hydraulic spring (421) is in a stretched state; the abutment rod (422) is vertically slidably connected to the assembly rod (451), and the second slider (43) is horizontally slidably connected to the assembly rod (451); the end of the assembly rod (451) is provided with a first sliding post (45), and the abutment rod (422) drives the first sliding post (45) at the end of the assembly rod (451) to be located on one side of the top surface of the first groove (151).

5. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 4, characterized in that: When the first dust sensor (1-1) is triggered, the microcontroller controls the movement of the electric slide rail (41), and the first slider (42) drives the second slider (43) to slowly descend a certain distance. This is the cleaning mode. When both the first dust sensor (1-1) and the second dust sensor (1-2) are triggered within a certain time period, the microcontroller controls the movement of the electric slide rail (41), and the first slider (42) drives the second slider (43) to quickly descend a certain distance. This is the purification mode. In the cleaning mode, the descent distance of the first slider (42) and the second slider (43) is less than that of the first slider (42) and the second slider (43) in the purification mode.

6. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that; The valve (2) is provided with a first air port (21) and a second air port (22); the return pipe (302) is provided with an exhaust pipe (321) and a branch pipe (322), the branch pipe (322) is divided into two air paths, the two air paths are respectively facing the lenses of the first dust sensor (1-1) and the second dust sensor (1-2); one end of the valve (2) is provided with an extension section (23), the end of the extension section (23) is conical and extends into the first dust inlet pipe (101), the air path regulating plate (1) presses down the extension section (23) to move the valve (2).

7. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that: The vacuum tube (200) has multiple air inlets with sealing plates (5) respectively connected by a connecting shaft (51); the top surface of the vacuum tube (200) is horizontally slidably connected to a connecting rod (53); one end of the connecting rod (53) is provided with a second groove (531), and the bottom surface of the groove is designed as a slope; the other end of the connecting rod (53) is slidably connected to a vertically downward track (52) on the connecting shaft (51); the top surface of the vacuum tube (200) is also vertically slidably connected to a transmission rod (54), and the lower end of the transmission rod (54) is provided with a second sliding column, which is fitted into the second groove (531) of the connecting rod (53).

8. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 1, characterized in that: An air intake fan (303) is provided on the top surface of the purification tank (300). The air outlet of the air intake fan (303) is connected to the return pipe (302). A cylindrical filter screen (6) is provided inside the purification tank (300). The lower end of the filter screen (6) is rotatably connected to the mounting base (304). The air intake fan (303) drives the filter screen (6). The air intake end of the air intake fan (303) is connected to a guide pipe (7). The guide pipe (7) extends downward and penetrates into the filter screen (6). The guide pipe (7) is located on a section of the pipe wall inside the filter screen (6) and has an opening on the side facing the connection between the air intake pipe (301) and the purification tank (300). Multiple scrapers (8) are provided on one side of the filter screen (6).

9. The intelligent dust concentration monitoring and dust suppression device for mines according to claim 8, characterized in that: The transmission method of the intake fan (303) to the filter screen (6) is as follows: a rotating shaft (60) is fixedly installed on the axis of the filter screen (6). The upper end of the rotating shaft (60) extends upward and is connected to the motor shaft of the intake fan (303). The lower end of the rotating shaft (60) is connected to a gear (62) through a belt. The gear (62) meshes with a gear ring (61), and the gear ring (61) is fixed to the filter screen (6).

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