A mine carbon dioxide leakage alarm system

Abstract

The present invention discloses a mine carbon dioxide leak alarm system, which relates to the field of carbon dioxide detection technology. The system comprises a main unit, a carbon dioxide detection mechanism, and an alarm mechanism. The main unit is provided with a sensor protection mechanism. The main unit includes an explosion-proof housing, a mainboard, and a display screen. The mainboard is provided with a data processing chip and a wireless transmission chip. The carbon dioxide detection mechanism comprises a connecting wire, an infrared carbon dioxide sensor, and an externally threaded sleeve. The carbon dioxide detection mechanism is fixedly mounted on the bottom of the explosion-proof housing. The alarm mechanism comprises a buzzer and a warning light. The buzzer is mounted on the front face of the explosion-proof housing, and the warning light is fixedly mounted on the top of the explosion-proof housing. The present invention has the advantages of explosion-proof, dustproof, self-cleaning, and intelligent early warning. It solves the problems in the prior art of sensors being susceptible to dust contamination, low detection accuracy, poor protection performance, and high maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide detection, in particular to a mine carbon dioxide leakage alarm system. Background Art

[0002] In mine environments, large amounts of carbon dioxide are often released due to factors such as geological structures, spontaneous combustion of coal seams, and human activities. Carbon dioxide is a colorless and odorless gas that, at high concentrations, is harmful to the human body and can even cause suffocation and death. Therefore, real-time monitoring of carbon dioxide concentrations in mines and providing timely warnings are crucial.

[0003] Currently, infrared sensors are commonly used to detect carbon dioxide in mines. Their principle is to determine carbon dioxide concentration by detecting the absorption intensity of infrared light at specific wavelengths. However, mine environments are complex and harsh, characterized by high temperatures, high humidity, high dust levels, and strong corrosive conditions. These factors severely impact the stability and service life of infrared sensors. Dust contamination, in particular, can easily cause dust to adhere to the sensor lens surface, leading to infrared signal attenuation, affecting detection accuracy and even causing false or missed alarms.

[0004] Furthermore, existing alarm systems generally lack effective protection mechanisms in their structural design. For example, while explosion-proof housings can prevent external gases from entering to a certain extent, they still cannot effectively protect the sensor, which is exposed to the elements for extended periods. Furthermore, when the sensor is not in operation, it is often exposed to the elements, making it susceptible to damage from collisions or scratches, increasing maintenance frequency and costs. Therefore, a mine carbon dioxide leak alarm system is needed to address these issues. Summary of the Invention

[0005] The purpose of the present invention is to provide a mine carbon dioxide leakage alarm system with the advantages of explosion-proof, dust-proof, self-cleaning and intelligent early warning, which solves the problems in the prior art that sensors are susceptible to dust contamination, have low detection accuracy, poor protection performance and high maintenance costs.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a mine carbon dioxide leakage alarm system, comprising a host, a carbon dioxide detection mechanism and an alarm mechanism, wherein a sensor protection mechanism is provided in the host;

[0007] The host comprises an explosion-proof casing, a mainboard and a display screen, wherein the mainboard is provided with a data processing chip and a wireless transmission chip;

[0008] The carbon dioxide detection mechanism includes a connecting line, an infrared carbon dioxide sensor and an external threaded sleeve, and the carbon dioxide detection mechanism is fixedly installed at the bottom of the explosion-proof housing;

[0009] The alarm mechanism includes a buzzer and a warning light, the buzzer is installed on the front end surface of the explosion-proof housing, and the warning light is fixedly installed on the top of the explosion-proof housing;

[0010] The sensor protection mechanism comprises a sealing shell, a pulse airflow generating component and an air blowing component, and the sensor protection mechanism is fixedly installed on the bottom of the explosion-proof housing.

[0011] As a preferred mine carbon dioxide leakage alarm system of the present invention, the sealing shell is fixedly installed at the bottom of the inner end surface of the explosion-proof casing, and a partition and an elastic diaphragm are provided in the sealing shell. The partition and the elastic diaphragm divide the sealing shell into a first chamber, a second chamber and a third chamber. The pulse airflow generating component is installed at the top of the sealing shell, and the blowing component is installed at the bottom of the sealing shell.

[0012] As a preferred mine carbon dioxide leakage alarm system of the present invention, the pulse airflow generating assembly includes a first sleeve, a first piston, a first spring, a motor and a turntable. The first sleeve is fixedly mounted on the top of the sealing shell and is connected to it through the first piston. The first piston is mounted in the first sleeve and is elastically slidably connected to it through the first spring.

[0013] As a preferred mine carbon dioxide leakage alarm system of the present invention, the motor is fixedly mounted on the upper end face of the sealing shell, the turntable is fixedly mounted on the output shaft of the motor, the upper end face of the first piston is provided with a connecting rod, the side end face of the first sleeve is provided with a sliding groove, the side end face of the connecting rod is provided with a slider that slides with the sliding groove, and the side end face of the turntable is provided with a toggle tooth that cooperates with the slider.

[0014] As a preferred mine carbon dioxide leakage alarm system of the present invention, the blowing assembly includes an internal threaded sleeve, a second sleeve, a second piston and a second spring. The internal threaded sleeve is fixedly installed at the bottom of the sealing shell, the second sleeve is slidably connected to the partition, the second piston is installed in the second sleeve and elastically slidably connected to the second spring, a main air hole is provided in the center of the second piston, and branch air holes that penetrate the main air hole are evenly provided on the side end surface of the second piston.

[0015] As a preferred mine carbon dioxide leakage alarm system of the present invention, a sliding hole is provided at the center of the second sleeve, a limiting plate is provided in the sliding hole, a sealing plate is provided on the top of the second piston, the second spring is installed between the limiting plate and the sealing plate, and a reflecting groove is provided at the bottom of the sliding hole.

[0016] As a preferred mine carbon dioxide leakage alarm system of the present invention, an air intake pipe communicating with the second chamber is provided at the bottom of the sealed shell, a filter is provided at the bottom of the air intake pipe, and a check cover is provided at the top of the air intake pipe.

[0017] As a preferred mine carbon dioxide leakage alarm system of the present invention, the externally threaded sleeve is sleeved on the outer end of the infrared carbon dioxide sensor and is rotatably connected thereto, and the outer end surface of the externally threaded sleeve is provided with an external thread that cooperates with the internally threaded sleeve.

[0018] As a preferred mine carbon dioxide leakage alarm system of the present invention, the front end of the infrared carbon dioxide sensor is provided with a first positioning flange, the bottom of the second sleeve is provided with a second positioning flange of the same size as the first positioning flange, and the side end face of the second positioning flange is provided with an air outlet.

[0019] As a preferred embodiment of the mine carbon dioxide leakage alarm system of the present invention, the upper end surface of the externally threaded sleeve is evenly provided with ash discharge holes that penetrate through the lower end surface thereof.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention constructs a dual physical and airtight protection system through the nested design of an explosion-proof casing and a multi-chamber sealed shell. The sealed shell is separated by an elastic diaphragm to form an independent chamber, so that the second chamber is completely isolated from the host electronic component chamber. The elastic diaphragm can not only transmit the pulse air pressure to the airflow chamber, but also block the flammable and corrosive gases in the mine from invading the core area of ​​the host, fundamentally avoiding the risk of short circuit or explosion of electronic components such as the motherboard and chips due to environmental erosion. At the same time, the infrared sensor adopts a rotary locking structure of an external threaded sleeve and an internal threaded sleeve, which can be screwed into the bottom of the sealed shell in the non-working state. The closed thread completely isolates the sensor lens from the outside, significantly reducing the probability of mechanical damage to the lens. This protection system solves the core pain points of short equipment life and high maintenance cost in the high corrosion and high collision environment of mines, laying the foundation for long-term and stable monitoring.

[0022] 2. The present invention aims to solve the problem of sensor lens contamination caused by mine dust. By cooperating with a pulse airflow generating component and a blowing component, a motor drives a turntable to periodically lift the first piston to compress the spring to store energy, which is instantly released to form a high-pressure pulse airflow that is injected into the second cavity. The airflow is accelerated and ejected through the main air hole and the inclined branch hole of the blowing component, and then focused and diffused through the conical reflection groove to form a turbulent flow covering the entire surface of the lens. The elastic sliding structure of the second piston realizes one-way airflow control: when the air pressure rises, the sealing plate moves down to expose the branch hole, and the airflow is ejected at high speed; when the air pressure drops, the branch hole closes, and cooperates with the check cover and filter of the air inlet pipe to prevent the dust-laden air from being sucked back. The cleaned dust is accelerated with the airflow through the slit air cavity between the positioning flanges, and is finally directed out of the equipment through the dust discharge hole of the external threaded sleeve. This design completely solves the problem of infrared signal attenuation caused by dust accumulation on the lens, ensuring the long-term accuracy and reliability of carbon dioxide concentration detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first perspective;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the sensor protection mechanism of the present invention;

[0027] Figure 5 Schematic diagram of the cross-sectional structure of the sensor protection mechanism of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the detection mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 5 Enlarged view of point A in the middle;

[0030] Figure 8 Schematic diagram of the cross-sectional structure of the blowing assembly of the present invention;

[0031] Figure 9 This is a schematic diagram of the circuit board structure of the present invention;

[0032] Figure 10 For the present invention Figure 8 Enlarged view of point B in the middle;

[0033] Figure 11 For the present invention Figure 8 Enlarged view of point C in the middle;

[0034] Figure 12 It is a schematic diagram of the cross-sectional structure of the air intake pipe of the present invention.

[0035] In the figure: 1. Host; 101. Explosion-proof housing; 102. Main board; 1021. Data processing chip; 1022. Wireless transmission chip; 103. Display screen; 2. Carbon dioxide detection mechanism; 201. Connecting wire; 202. Infrared carbon dioxide sensor; 203. Externally threaded sleeve; 204. Ash discharge hole; 205. First positioning flange; 3. Alarm mechanism; 301. Buzzer; 302. Warning light; 4. Sensor protection mechanism; 401. Sealing shell; 4011. Partition; 4012. Elastic diaphragm; 4013. First chamber; 4014. Second chamber; 4015. Third chamber; 4016. Inlet pipe; 4017. Filter; 4018 , check cover; 402, pulse airflow generating assembly; 4021, first sleeve; 4022, first piston; 4023, connecting rod; 4024, first spring; 4025, slider; 4026, motor; 4027, turntable; 4028, toggle gear; 4029, slide groove; 403, blowing assembly; 4031, internal threaded sleeve; 4032, second sleeve; 40321, second positioning flange; 40322, air outlet; 40323, slide hole; 40324, reflection groove; 40325, limit plate; 4033, second piston; 40331, main air hole; 40332, branch air hole; 40333, sealing plate; 4034, second spring. DETAILED DESCRIPTION

[0036] Example 1

[0037] See also Figures 1-12 , a mine carbon dioxide leakage alarm system, comprising a host 1, a carbon dioxide detection mechanism 2 and an alarm mechanism 3, wherein a sensor protection mechanism 4 is provided in the host 1;

[0038] The host 1 includes an explosion-proof housing 101, a mainboard 102 and a display screen 103. The mainboard 102 is provided with a data processing chip 1021 and a wireless transmission chip 1022;

[0039] The carbon dioxide detection mechanism 2 includes a connecting line 201, an infrared carbon dioxide sensor 202 and an external threaded sleeve 203. The carbon dioxide detection mechanism 2 is fixedly installed at the bottom of the explosion-proof housing 101;

[0040] The alarm mechanism 3 includes a buzzer 301 and a warning light 302. The buzzer 301 is installed on the front face of the explosion-proof housing 101, and the warning light 302 is fixedly installed on the top of the explosion-proof housing 101.

[0041] The sensor protection mechanism 4 includes a sealed shell 401 , a pulse airflow generating assembly 402 and an air blowing assembly 403 . The sensor protection mechanism 4 is fixedly mounted on the bottom of the explosion-proof housing 101 .

[0042] The infrared carbon dioxide sensor 202 is used to detect the carbon dioxide concentration in the mine, and the data is transmitted to the data processing chip 1021. The data processing chip 1021 analyzes the carbon dioxide concentration. If the carbon dioxide concentration exceeds the threshold or the carbon dioxide concentration growth rate is abnormal, the alarm mechanism 3 is triggered to sound an alarm, and the wireless transmission chip 1022 synchronizes data with other devices to remind the personnel in the mine to evacuate in time. When the infrared carbon dioxide sensor 202 is not in use, it is stored in the sensor protection mechanism 4 to avoid scratches on the lens at the front end of the infrared carbon dioxide sensor 202. At the same time, the sensor protection mechanism 4 can blow air and remove dust through pulse airflow to remove surface dust and improve detection accuracy.

[0043] Furthermore, the sealing shell 401 is fixedly installed at the bottom of the inner end surface of the explosion-proof casing 101, and a partition 4011 and an elastic diaphragm 4012 are provided in the sealing shell 401. The partition 4011 and the elastic diaphragm 4012 divide the sealing shell 401 into a first chamber 4013, a second chamber 4014 and a third chamber 4015. The pulse airflow generating component 402 is installed at the top of the sealing shell 401, and the blowing component 403 is installed at the bottom of the sealing shell 401.

[0044] The explosion-proof casing 101 and the sealed casing 401 isolate the electronic components from the air in the mine, and separate the second chamber 4014 and the third chamber 4015 through a diaphragm. The diaphragm is made of elastic material and can undergo elastic deformation to transfer the air pressure in the third chamber 4015 to the second chamber 4014, and can isolate the air in the third chamber 4015 and the second chamber 4014, preventing underground gas from entering the third chamber 4015 and then leaking into the explosion-proof casing 101.

[0045] Furthermore, the pulse airflow generating assembly 402 includes a first sleeve 4021, a first piston 4022, a first spring 4024, a motor 4026 and a turntable 4027. The first sleeve 4021 is fixedly mounted on the top of the sealing shell 401 and is connected thereto. The first piston 4022 is mounted in the first sleeve 4021 and is elastically slidably connected thereto through the first spring 4024.

[0046] The motor 4026 drives the turntable 4027 to rotate, so that the turntable 4027 pushes the first piston 4022 upward, causing it to squeeze the first spring 4024 to accumulate force. When the limit is released, the first piston 4022 rebounds rapidly under the resetting action of the first spring 4024, so that the air pressure in the second chamber 4014 increases instantly, and blows it onto the lens of the infrared carbon dioxide sensor 202 through the blowing component 403, blowing off the dust on its surface.

[0047] Furthermore, the motor 4026 is fixedly mounted on the upper end surface of the sealing shell 401, the turntable 4027 is fixedly mounted on the output shaft of the motor 4026, the upper end surface of the first piston 4022 is provided with a connecting rod 4023, the side end surface of the first sleeve 4021 is provided with a sliding groove 4029, the side end surface of the connecting rod 4023 is provided with a slider 4025 that slides with the sliding groove 4029, and the side end surface of the turntable 4027 is provided with a shifting tooth 4028 that cooperates with the slider 4025.

[0048] The motor 4026 drives the turntable 4027 to rotate counterclockwise, thereby driving the toggle tooth 4028 to rotate. When the toggle tooth 4028 rotates to the lower end of the slider 4025, the upper end surface of the toggle tooth 4028 squeezes the lower end surface of the slider 4025, thereby driving the first piston 4022 to slide upward through the connecting rod 4023. The turntable 4027 continues to rotate, and the toggle tooth 4028 gradually separates from the slider 4025, so that the first piston 4022 quickly rebounds under the action of the first spring 4024.

[0049] Furthermore, the blowing assembly 403 includes an internally threaded sleeve 4031, a second sleeve 4032, a second piston 4033 and a second spring 4034. The internally threaded sleeve 4031 is fixedly installed at the bottom of the sealed shell 401, the second sleeve 4032 passes through the partition 4011 and is slidably connected thereto, the second piston 4033 is installed in the second sleeve 4032 and is elastically slidably connected thereto through the second spring 4034, a main air hole 40331 is provided at the center of the second piston 4033, and branch air holes 40332 that penetrate the main air hole 40331 are evenly provided on the side end surface of the second piston 4033.

[0050] When the second pulse airflow production component continuously generates pulse airflow into the second chamber 4014, the airflow passes through the main air hole 40331 and blows onto the lens of the infrared carbon dioxide sensor 202 via the branch hole 40332, and the branch hole 40332 is inclined downward, which can effectively blow off the surface dust.

[0051] Furthermore, a sliding hole 40323 is provided at the center of the second sleeve 4032, a limiting plate 40325 is provided in the sliding hole 40323, a sealing plate 40333 is provided on the top of the second piston 4033, the second spring 4034 is installed between the limiting plate 40325 and the sealing plate 40333, and a reflecting groove 40324 is provided at the bottom of the sliding hole 40323.

[0052] The second piston 4033 is elastically slidably connected to the second sleeve 4032 by the second spring 4034. When the air pressure in the second chamber 4014 increases, the air branch hole 40332 is blocked by the reflecting groove 40324, resulting in the air flow being unable to be discharged smoothly, so that the sealing plate 40333 moves downward, squeezing the second spring 4034, and the air branch hole 40332 leaks downward, so that the air flow can be discharged smoothly from the air branch hole 40332. On the one hand, it increases the air flow pressure, and on the other hand, it makes the air flow flow in one direction from the main air hole 40331 to the air branch hole 40332, avoiding the dust being sucked into the second chamber 4014 when inhaling. The air flow blown out of the air branch hole 40332 passes through the conical reflecting groove 40324, and generates an air flow blowing toward the center of the lens through the reflecting groove 40324, further increasing the air flow coverage area and improving the dust removal effect.

[0053] Furthermore, an air inlet pipe 4016 communicating with the second chamber 4014 is provided at the bottom of the sealed shell 401 , a filter screen 4017 is provided at the bottom of the air inlet pipe 4016 , and a non-return cover 4018 is provided at the top of the air inlet pipe 4016 .

[0054] The non-return cover 4018 is elastically connected to the air intake pipe 4016 through a torsion spring. When the first piston 4022 is pulled upward, the air branch hole 40332 is blocked by the reflection groove 40324, and air cannot be taken in. Air is inhaled through the air intake pipe 4016, and the external air flow is filtered by the filter 4017 and then enters the second chamber 4014. When exhausting, the non-return cover 4018 is closed, thereby forming a one-way airflow circulation.

[0055] Furthermore, the external threaded sleeve 203 is sleeved on the outer end of the infrared carbon dioxide sensor 202 and is rotatably connected thereto. The outer end surface of the external threaded sleeve 203 is provided with an external thread that matches the internal threaded sleeve 4031 .

[0056] When the infrared carbon dioxide sensor 202 is not in use, the infrared carbon dioxide sensor 202 is fixed to the bottom of the sealed shell 401 by cooperating with the external threaded sleeve 203 and the internal threaded sleeve 4031, thereby preventing the lens of the infrared carbon dioxide sensor 202 from being scratched and allowing it to be cleaned. The threaded connection method facilitates installation and disassembly.

[0057] Furthermore, a first positioning flange 205 is provided at the front end of the infrared carbon dioxide sensor 202 , a second positioning flange 40321 of the same size as the first positioning flange 205 is provided at the bottom of the second sleeve 4032 , and an air outlet 40322 is provided on the side end surface of the second positioning flange 40321 .

[0058] A narrow air cavity is formed between the first flange and the second positioning flange 40321. When air flows into the air cavity from the branch hole 40332, dust is stirred up on the surface of the lens, and the air flow drives the dust to be quickly discharged from the air outlet 40322, thereby achieving rapid dust removal. The sum of the heights of the first positioning flange 205 and the second positioning flange 40321 is less than the distance between the sealing plate 40333 and the limit plate 40325, thereby preventing the second piston 4033 from hitting the lens.

[0059] Furthermore, the upper end surface of the external threaded sleeve 203 is evenly provided with ash discharge holes 204 that penetrate through the lower end surface thereof.

[0060] After passing through the air outlet 40322 , the airflow is finally discharged out of the device through the dust discharge hole 204 , thereby completely discharging the dust and improving the detection accuracy of the infrared carbon dioxide sensor 202 .

[0061] When using this alarm system, first remove the infrared carbon dioxide sensor 202 with the external threaded sleeve 203 from the bottom of the explosion-proof housing 101 through a threaded connection, so that the infrared carbon dioxide sensor 202 is in working condition, and the lens at the front end is exposed to detect the carbon dioxide concentration in the mine. During operation, the infrared carbon dioxide sensor 202 transmits the detected carbon dioxide concentration data to the data processing chip 1021 on the main board 102 through the connecting line 201. The data processing chip 1021 analyzes the data. When the carbon dioxide concentration exceeds the set threshold or the concentration growth rate is abnormal, the buzzer 301 installed on the front face of the explosion-proof housing 101 and the warning light 302 on the top are triggered to alarm. At the same time, the wireless transmission chip 1022 synchronizes data with other devices to remind the personnel in the mine to evacuate in time. After use, the infrared carbon dioxide sensor 202 is installed at the bottom of the sensor protection mechanism 4 for maintenance. The sensor protection mechanism 4 in the host 1 starts to work, the motor 4026 drives the turntable 4027 to rotate, and the toggle gear 4028 on the turntable 4027 pushes the sliding gear on the first piston 4022. Block 4025 causes the first piston 4022 to slide upward in the first sleeve 4021, squeezing the first spring 4024 to accumulate force. When the toggle tooth 4028 separates from the slider 4025, the first piston 4022 rebounds rapidly under the reset action of the first spring 4024, causing the air pressure in the second chamber 4014 to increase instantly. At this time, the increased air pressure in the second chamber 4014 acts on the second piston 4033. Because the air branch hole 40332 is initially blocked by the reflecting groove 40324, the air flow cannot be discharged. The sealing plate 40333 moves downward to squeeze the second spring 4034. The air flows downward through the branch hole 40332, and the air flows through the main air hole 40331 and blows toward the lens of the infrared carbon dioxide sensor 202 via the branch hole 40332. The branch hole 40332 is tilted downward to effectively blow off the dust on the edge, and is reflected by the reflection groove 40324 to generate an air flow blowing toward the center of the lens, thereby improving the dust removal effect. When the first piston 4022 is pulled upward to inhale, the non-return cover 4018 opens, and the external air flows through the filter 4017 at the bottom of the intake pipe 4016 and then enters the second chamber 4014. When exhausting, the non-return cover 4018 closes, forming a one-way airflow circulation.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mine carbon dioxide leakage alarm system, comprising a host (1), a carbon dioxide detection mechanism (2) and an alarm mechanism (3), characterized in that: A sensor protection mechanism (4) is provided in the host (1); The host (1) comprises an explosion-proof housing (101), a mainboard (102) and a display screen (103); a data processing chip (1021) and a wireless transmission chip (1022) are provided on the mainboard (102); The carbon dioxide detection mechanism (2) comprises a connecting line (201), an infrared carbon dioxide sensor (202) and an externally threaded sleeve (203), and the carbon dioxide detection mechanism (2) is fixedly mounted on the bottom of the explosion-proof housing (101); The alarm mechanism (3) includes a buzzer (301) and a warning light (302), wherein the buzzer (301) is mounted on the front end surface of the explosion-proof housing (101), and the warning light (302) is fixedly mounted on the top of the explosion-proof housing (101); The sensor protection mechanism (4) comprises a sealing shell (401), a pulse airflow generating component (402) and an air blowing component (403), and the sensor protection mechanism (4) is fixedly mounted on the bottom of the explosion-proof housing (101); The sealing shell (401) is fixedly mounted on the bottom of the inner end surface of the explosion-proof housing (101); a partition (4011) and an elastic diaphragm (4012) are provided in the sealing shell (401); the partition (4011) and the elastic diaphragm (4012) divide the sealing shell (401) into a first chamber (4013), a second chamber (4014) and a third chamber (4015); the pulse airflow generating component (402) is mounted on the top of the sealing shell (401); and the blowing component (403) is mounted on the bottom of the sealing shell (401); The pulse airflow generating assembly (402) comprises a first sleeve (4021), a first piston (4022), a first spring (4024), a motor (4026) and a rotating disk (4027); the first sleeve (4021) is fixedly mounted on the top of the sealing shell (401) and is in continuous connection therewith; the first piston (4022) is mounted in the first sleeve (4021) and is in elastic sliding connection therewith via the first spring (4024); The motor (4026) is fixedly mounted on the upper end surface of the sealing shell (401), the turntable (4027) is fixedly mounted on the output shaft of the motor (4026), the upper end surface of the first piston (4022) is provided with a connecting rod (4023), the side end surface of the first sleeve (4021) is provided with a sliding groove (4029), the side end surface of the connecting rod (4023) is provided with a slider (4025) that slidably cooperates with the sliding groove (4029), and the side end surface of the turntable (4027) is provided with a toggle tooth (4028) that cooperates with the slider (4025); The blowing assembly (403) comprises an internally threaded sleeve (4031), a second sleeve (4032), a second piston (4033) and a second spring (4034); the internally threaded sleeve (4031) is fixedly mounted on the bottom of the sealing shell (401); the second sleeve (4032) passes through the partition (4011) and is slidably connected thereto; the second piston (4033) is mounted in the second sleeve (4032) and is elastically slidably connected thereto via the second spring (4034); a main air hole (40331) is provided at the center of the second piston (4033); and branch air holes (40332) that are in communication with the main air hole (40331) are evenly arranged on the side end surface of the second piston (4033); A sliding hole (40323) is provided at the center of the second sleeve (4032), a limiting plate (40325) is provided in the sliding hole (40323), a sealing plate (40333) is provided on the top of the second piston (4033), the second spring (4034) is installed between the limiting plate (40325) and the sealing plate (40333), and a reflecting groove (40324) is provided at the bottom of the sliding hole (40323); An air intake pipe (4016) communicating with the second chamber (4014) is provided at the bottom of the sealed shell (401), a filter screen (4017) is provided at the bottom of the air intake pipe (4016), and a non-return cover (4018) is provided at the top of the air intake pipe (4016).

2. A mine carbon dioxide leakage alarm system according to claim 1, characterized in that: The externally threaded sleeve (203) is sleeved on the outer end of the infrared carbon dioxide sensor (202) and is rotatably connected thereto. The outer end surface of the externally threaded sleeve (203) is provided with an external thread that cooperates with the internally threaded sleeve (4031).

3. A mine carbon dioxide leakage alarm system according to claim 2, characterized in that: The front end of the infrared carbon dioxide sensor (202) is provided with a first positioning flange (205), the bottom of the second sleeve (4032) is provided with a second positioning flange (40321) of the same size as the first positioning flange (205), and the side end surface of the second positioning flange (40321) is provided with an air outlet (40322).

4. A mine carbon dioxide leakage alarm system according to claim 3, characterized in that: The upper end surface of the externally threaded sleeve (203) is evenly provided with ash discharge holes (204) that penetrate through the lower end surface thereof.

Images