Mine carbon dioxide leakage alarm system

Abstract

The invention discloses a mine carbon dioxide leakage alarm system, and relates to the technical field of carbon dioxide detection, the mine carbon dioxide leakage alarm system comprises a host, a carbon dioxide detection mechanism and an alarm mechanism, a sensor protection mechanism is arranged in the host, the host comprises an explosion-proof casing, a mainboard and a display screen, and 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 external thread sleeve, the carbon dioxide detection mechanism is fixedly installed at the bottom of the explosion-proof machine shell, the alarm mechanism comprises a buzzer and an alarm lamp, the buzzer is installed on the front end face of the explosion-proof machine shell, and the alarm lamp is fixedly installed on the top of the explosion-proof machine shell. The system has the advantages of explosion prevention, dust prevention, self-cleaning and intelligent early warning, and solves the problems that a sensor in the prior art is easily polluted by dust, the detection precision is low, the protection performance is poor and the maintenance cost is high.

Description

Technical Field

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

[0002] In the mine operation environment, due to factors such as geological structure, coal seam spontaneous combustion or human activities, a large amount of carbon dioxide gas is often released. Carbon dioxide is a colorless and odorless gas, which is harmful to the human body at high concentrations and can even cause suffocation and death. Therefore, it is crucial to monitor the carbon dioxide concentration in the mine in real time and give timely warnings.

[0003] At present, infrared sensors are mostly used for carbon dioxide detection in mines. Its principle is to judge the carbon dioxide concentration by detecting the absorption intensity of infrared light at a specific wavelength. However, the mine environment is complex and harsh, with problems such as high temperature, high humidity, large dust, and strong corrosion. These factors seriously affect the stability and service life of infrared sensors. Especially the dust pollution problem is extremely likely to cause dust to adhere to the surface of the sensor lens, resulting in attenuation of the infrared signal, thus affecting the detection accuracy and even causing false alarms or missed alarms.

[0004] In addition, the existing alarm systems generally lack effective protection mechanisms in terms of structural design. For example, although the explosion-proof shell can prevent external gases from entering to a certain extent, it still cannot provide effective protection for the sensor part that is exposed for a long time. At the same time, the sensor is usually exposed when it is in the non-working state, and it is easy to damage the lens due to collision or scratching, increasing the maintenance frequency and cost. Therefore, a mine carbon dioxide leakage alarm system is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a mine carbon dioxide leakage alarm system, which has the advantages of explosion-proof, dust-proof, self-cleaning and intelligent warning, and solves the problems of easy dust pollution of sensors, low detection accuracy, poor protection performance and high maintenance cost in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A mine carbon dioxide leakage alarm system includes a host, a carbon dioxide detection mechanism and an alarm mechanism, and a sensor protection mechanism is arranged in the host;

[0007] The host includes an explosion-proof housing, a main board and a display screen, and a data processing chip and a wireless transmission chip are arranged on the main board;

[0008] The carbon dioxide detection mechanism includes a connecting wire, an infrared carbon dioxide sensor and an external thread 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 at 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 arranged 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 on the top of the sealing shell, and the blowing component is installed on 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 through-connected thereto. The first piston is mounted in the first sleeve and is elastically slidably connected thereto 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 surface of the sealing shell, the turntable is fixedly mounted on the output shaft of the motor, the upper end surface of the first piston is provided with a connecting rod, the side end surface of the first sleeve is provided with a sliding groove, the side end surface of the connecting rod is provided with a sliding block slidably matched with the sliding groove, and the side end surface of the turntable is provided with a toggle tooth matched with the sliding block.

[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 passes through the partition and is slidably connected thereto, the second piston is installed in the second sleeve and is elastically slidably connected thereto through the second spring, a main air hole is arranged at the center of the second piston, and branch air holes which are connected to the main air hole are evenly arranged 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 arranged at the center of the second sleeve, a limiting plate is arranged in the sliding hole, a sealing plate is arranged 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 arranged 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 arranged at the bottom of the sealing shell, a filter is arranged at the bottom of the air intake pipe, and a check cover is arranged at the top of the air intake pipe.

[0017] Preferably, as a mine carbon dioxide leakage alarm system of the present invention, the external thread sleeve is sleeved on the outer end of the infrared carbon dioxide sensor and is rotationally connected thereto, and an external thread matching with the internal thread sleeve is provided on the outer end face of the external thread sleeve.

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

[0019] Preferably, as a mine carbon dioxide leakage alarm system of the present invention, ash discharge holes communicating with the lower end face are uniformly provided on the upper end face of the external thread sleeve.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. Through the nested design of the explosion-proof housing and the multi-chamber sealing housing, the present invention constructs a dual protection system of physics and airtightness. The sealing housing is separated by an elastic diaphragm to form independent chambers, so that the second chamber is completely isolated from the main engine electronic component chamber. The elastic diaphragm can transmit the pulsed air pressure to the air flow chamber and block the intrusion of flammable and corrosive gases in the mine into the core area of the main engine. Fundamentally, it avoids the short circuit or explosion risk of electronic components such as the main board and chip caused by environmental erosion. At the same time, the infrared sensor adopts a rotary locking structure of an external thread sleeve and an internal thread sleeve, which can be screwed into the bottom of the sealing housing in the non-working state, and the threaded closure 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 the mine, laying a foundation for long-term stable monitoring.

[0022] 2. Aiming at the problem of sensor lens pollution caused by mine dust, through the cooperation of the pulsed air flow generating component and the air blowing component, the motor drives the turntable to periodically lift the first piston to compress the spring for energy storage, and then forms a high-pressure pulsed air flow injected into the second chamber after instantaneous release. The air flow is accelerated and sprayed through the main air hole and the inclined branch air hole of the air blowing component, and then is 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 air flow control: when the air pressure rises, the sealing plate moves down to expose the branch air hole, and the air flow sprays out at high speed; when the air pressure drops, the branch air hole closes, and the check valve cover and filter screen of the air inlet pipe cooperate to prevent the backflow of dusty air. The cleaned dust is accelerated along with the air flow through the slit air cavity between the positioning flanges and is finally directed out of the device through the ash discharge hole of the external thread sleeve. This design completely solves the problem of infrared signal attenuation caused by lens dust accumulation and ensures the long-term accuracy and reliability of carbon dioxide concentration detection data. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the first perspective of the present invention;

[0024] Figure 2 is the overall structural schematic diagram of the second perspective of the present invention;

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

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

[0027] Figure 5 is the cross-sectional structural schematic diagram of the sensor protection mechanism of the present invention;

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

[0029] Figure 7 is the Figure 5 enlarged view of part A in the present invention;

[0030] Figure 8 is the cross-sectional structural schematic diagram of the blowing component of the present invention;

[0031] Figure 9 is the structural schematic diagram of the circuit board of the present invention;

[0032] Figure 10 is the Figure 8 enlarged view of part B in the present invention;

[0033] Figure 11 is the Figure 8 enlarged view of part C in the present invention;

[0034] Figure 12 is the cross-sectional structural schematic diagram of the intake pipe of the present invention.

[0035] In the figure: 1. Main unit; 101. Explosion-proof housing; 102. Motherboard; 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. External thread 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 board; 4012. Elastic diaphragm; 4013. First chamber; 4014. Second chamber; 4015. Third chamber; 4016. Air inlet pipe; 4017. Filter screen; 4018. Check valve cover; 402. Pulse gas flow generating assembly; 4021. First sleeve; 4022. First piston; 4023. Connecting rod; 4024. First spring; 4025. Slide block; 4026. Motor; 4027. Turntable; 4028. Dialing tooth; 4029. Slide groove; 403. Blowing assembly; 4031. Internal thread sleeve; 4032. Second sleeve; 40321. Second positioning flange; 40322. Air outlet hole; 40323. Slide hole; 40324. Reflection groove; 40325. Limiting plate; 4033. Second piston; 40331. Main air hole; 40332. Branch air hole; 40333. Sealing plate; 4034. Second spring. Detailed implementation manners

[0036] Embodiment 1

[0037] Please refer to Figures 1-12 , a mine carbon dioxide leakage alarm system, including a main unit 1, a carbon dioxide detection mechanism 2 and an alarm mechanism 3, and a sensor protection mechanism 4 is arranged in the main unit 1;

[0038] The main unit 1 includes an explosion-proof housing 101, a motherboard 102 and a display screen 103, and a data processing chip 1021 and a wireless transmission chip 1022 are arranged on the motherboard 102;

[0039] The carbon dioxide detection mechanism 2 includes a connecting wire 201, an infrared carbon dioxide sensor 202 and an external thread sleeve 203, and 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 end 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 sealing shell 401, a pulse gas flow generating assembly 402 and a blowing assembly 403, and the sensor protection mechanism 4 is fixedly installed at the bottom of the explosion-proof housing 101.

[0042] The carbon dioxide concentration in the mine is detected by the infrared carbon dioxide sensor 202, and the data is transmitted to the data processing chip 1021. The data processing chip 1021 analyzes the carbon dioxide concentration. When the carbon dioxide concentration exceeds the threshold or the growth rate of the carbon dioxide concentration is abnormal, the alarm mechanism 3 is triggered to give an alarm, and data synchronization is carried out with other devices through the wireless transmission chip 1022, so as to remind the miners underground to evacuate in time. When the infrared carbon dioxide sensor 202 is not in use, it is put into the sensor protection mechanism 4 to avoid scratching 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 to remove dust on its surface through pulsed air flow, removing the surface floating dust and improving the detection accuracy.

[0043] Further, the sealing shell 401 is fixedly installed at the bottom of the inner end face of the explosion-proof housing 101. A partition plate 4011 and an elastic diaphragm 4012 are arranged in the sealing shell 401. The partition plate 4011 and the elastic diaphragm 4012 divide the inside of the sealing shell 401 into a first chamber 4013, a second chamber 4014 and a third chamber 4015. The pulsed air flow generating assembly 402 is installed at the top of the sealing shell 401, and the air blowing assembly 403 is installed at the bottom of the sealing shell 401.

[0044] The explosion-proof housing 101 and the sealing shell 401 isolate the electronic components from the air in the mine. The second chamber 4014 and the third chamber 4015 are separated by a diaphragm, and the diaphragm is made of an elastic material and can undergo elastic deformation. It transmits the air pressure change 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 housing 101.

[0045] Further, the pulsed air flow 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 installed at the top of the sealing shell 401 and is connected to it in a penetrating manner. The first piston 4022 is installed in the first sleeve 4021 and is elastically slidably connected to it 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 compress the first spring 4024 to store energy. When the limit is released, the first piston 4022 quickly rebounds under the reset action of the first spring 4024, so that the air pressure in the second chamber 4014 increases instantaneously, and blows through the air blowing assembly 403 onto the lens of the infrared carbon dioxide sensor 202, blowing off the floating 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 toggle 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 internal threaded sleeve 4031, a second sleeve 4032, a second piston 4033 and a second spring 4034. The internal threaded sleeve 4031 is fixedly installed at 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 installed in the second sleeve 4032 and is elastically slidably connected thereto through the second spring 4034, a main air hole 40331 is arranged at the center of the second piston 4033, and branch air holes 40332 which are connected to the main air hole 40331 are evenly arranged 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 air hole 40332, and the branch air 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 and the second sleeve 4032 are elastically and slidably connected by a second spring 4034. When the air pressure in the second chamber 4014 increases, since the air support hole 40332 is blocked by the reflection groove 40324, the air flow cannot be discharged smoothly. As a result, the sealing plate 40333 moves downward, squeezing the second spring 4034, and the air support hole 40332 leaks downward, so that the air flow can be discharged smoothly from the air support hole 40332. On the one hand, the air flow pressure is increased, and on the other hand, the air flow flows unidirectionally from the main air hole 40331 to the air support hole 40332, preventing dust from being sucked into the second chamber 4014 during inhalation. Through the conical reflection groove 40324, the air flow blown out of the air support hole 40332 generates an air flow blowing towards the center of the lens through the reflection groove 40324, further increasing the air flow coverage area and improving the dust removal effect.

[0053] Further, an air inlet pipe 4016 communicating with the second chamber 4014 is provided at the bottom of the sealing case 401. A filter screen 4017 is provided at the bottom of the air inlet pipe 4016, and a check valve cover 4018 is provided at the top of the air inlet pipe 4016.

[0054] The check valve cover 4018 and the air inlet pipe 4016 are elastically rotatably connected by a torsion spring. During the upward lifting process of the first piston 4022, the air support hole 40332 is blocked by the reflection groove 40324 and cannot intake air. Air is inhaled through the air inlet pipe 4016, and the external air flow enters the second chamber 4014 after being filtered by the filter screen 4017. When exhausting, the check valve cover 4018 closes, thus forming a unidirectional air flow cycle.

[0055] Further, an external thread sleeve 203 is sleeved on the outer end of the infrared carbon dioxide sensor 202 and is rotatably connected thereto. An external thread cooperating with the internal thread sleeve 4031 is provided on the outer end face of the external thread sleeve 203.

[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 sealing case 401 by the cooperation of the external thread sleeve 203 and the internal thread sleeve 4031, thus preventing the lens of the infrared carbon dioxide sensor 202 from being scratched and being able to clean it at the same time. The threaded connection method is convenient for installation and disassembly.

[0057] Further, a first positioning flange 205 is provided at the front end of the infrared carbon dioxide sensor 202. A second positioning flange 40321 having the same size as the first positioning flange 205 is provided at the bottom of the second sleeve 4032. An air outlet hole 40322 is provided on the side end face of the second positioning flange 40321.

[0058] A narrow air cavity is formed between the first flange and the second positioning flange 40321. When the air flow enters this air cavity from the branch air hole 40332, it stirs up the dust on the lens surface, and the air flow drives the dust to quickly discharge from the air outlet hole 40322, thus realizing 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 limiting plate 40325 to prevent the second piston 4033 from hitting the lens.

[0059] Furthermore, dust discharge holes 204 that communicate with the upper end surface of the external thread sleeve 203 are evenly arranged on the upper end surface of the external thread sleeve 203.

[0060] After the air flow passes through the air outlet hole 40322, it finally discharges out of the device through the dust discharge holes 204, thereby completely discharging the dust and improving the detection accuracy of the infrared carbon dioxide sensor 202.

[0061] When the alarm system is in use, firstly, the infrared carbon dioxide sensor 202 with the external threaded sleeve 203 is taken out from the bottom of the explosion-proof housing 101 through a threaded connection, so that the infrared carbon dioxide sensor 202 is in working state, and the lens at the front end thereof 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, and 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 end surface of the explosion-proof housing 101 and the warning light 302 on the top are triggered to alarm, and at the same time, the wireless transmission chip 1022 is used to synchronize 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, and the sensor protection mechanism 4 in the host 1 starts to work, and the motor 4026 drives the turntable 4027 to rotate, and the toggle tooth 4028 on the turntable 4027 pushes the sliding tooth 4028 on the first piston 4022. The first piston 4022 slides upward in the first sleeve 4021 to squeeze the first spring 4024 to store 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, so that the air pressure in the second chamber 4014 increases instantly. At this time, the increased air pressure in the second chamber 4014 acts on the second piston 4033. Since the air branch hole 40332 is initially blocked by the reflection groove 40324, the air flow cannot be discharged. The sealing plate 40333 moves downward to squeeze the second spring 4034. The branch hole 40332 leaks downward, and the air flows through the main air hole 40331 and blows toward the lens of the infrared carbon dioxide sensor 202 through 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 check cover 4018 opens, and the external air flow is filtered by the filter screen 4017 at the bottom of the intake pipe 4016 and then enters the second chamber 4014. When exhausting, the check cover 4018 is closed to form a one-way air flow 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 protection scope 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: The host (1) is provided with a sensor protection mechanism (4); The host (1) comprises an explosion-proof housing (101), a main board (102) and a display screen (103); a data processing chip (1021) and a wireless transmission chip (1022) are arranged on the main board (102); The carbon dioxide detection mechanism (2) comprises a connecting line (201), an infrared carbon dioxide sensor (202) and an externally threaded sleeve (203); the carbon dioxide detection mechanism (2) is fixedly mounted on the bottom of the explosion-proof housing (101); The alarm mechanism (3) comprises 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); the sensor protection mechanism (4) is fixedly mounted on the bottom of the explosion-proof housing (101).

2. The mine carbon dioxide leakage alarm system according to claim 1, characterized in that: The sealing shell (401) is fixedly mounted on the bottom of the inner end surface of the explosion-proof casing (101); a partition (4011) and an elastic diaphragm (4012) are arranged 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).

3. The mine carbon dioxide leakage alarm system according to claim 2, characterized in that: 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 connected thereto in a through-connection manner; the first piston (4022) is mounted in the first sleeve (4021) and is elastically slidably connected thereto via a first spring (4024).

4. The mine carbon dioxide leakage alarm system according to claim 3, characterized in that: The motor (4026) is fixedly mounted on the upper end surface of the sealing shell (401); the rotating disk (4027) is fixedly mounted on the output shaft of the motor (4026); a connecting rod (4023) is arranged on the upper end surface of the first piston (4022); a sliding groove (4029) is arranged on the side end surface of the first sleeve (4021); a sliding block (4025) slidably matched with the sliding groove (4029) is arranged on the side end surface of the connecting rod (4023); and a toggle tooth (4028) matched with the sliding block (4025) is arranged on the side end surface of the rotating disk (4027).

5. The mine carbon dioxide leakage alarm system according to claim 4, wherein: The blowing component (403) includes an internal-thread sleeve (4031), a second sleeve (4032), a second piston (4033), and a second spring (4034). The internal-thread sleeve (4031) is fixedly installed at the bottom of the sealing shell (401). The second sleeve (4032) passes through the partition plate (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). Branch air holes (40332) communicating with the main air hole (40331) are uniformly provided on the side end face of the second piston (4033).

6. The mine carbon dioxide leakage alarm system according to claim 5, characterized in that: 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 at the top of the second piston (4033). The second spring (4034) is installed between the limiting plate (40325) and the sealing plate (40333). A reflection groove (40324) is provided at the bottom of the sliding hole (40323).

7. The mine carbon dioxide leakage alarm system according to claim 6, characterized in that: An air inlet pipe (4016) communicating with the second chamber (4014) is provided at the bottom of the sealing shell (401). A filter screen (4017) is provided at the bottom of the air inlet pipe (4016). A check valve cover (4018) is provided at the top of the air inlet pipe (4016).

8. The mine carbon dioxide leakage alarm system according to claim 7, characterized in that: The external-thread sleeve (203) is sleeved on the outer end of the infrared carbon dioxide sensor (202) and is rotatably connected thereto. External threads matching the internal-thread sleeve (4031) are provided on the outer end face of the external-thread sleeve (203).

9. The mine carbon dioxide leakage alarm system according to claim 8, characterized in that: A first positioning flange (205) is provided at the front end of the infrared carbon dioxide sensor (202). A second positioning flange (40321) having the same size as the first positioning flange (205) is provided at the bottom of the second sleeve (4032). An air outlet hole (40322) is provided on the side end face of the second positioning flange (40321).

10. A mine carbon dioxide leakage alarm system according to claim 9, characterized in that: Ash discharge holes (204) communicating with the lower end face are uniformly provided on the upper end face of the external-thread sleeve (203).

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