A gas detection device for safe mining of coal mines

Abstract

The application relates to the field of coal mine gas measurement technology and discloses a gas detection device for safe mining of coal mines, which comprises a gas detector, a support, a driving mechanism and a lifting mechanism, the support is slidingly connected in a mine tunnel, the driving mechanism is connected to the support, the driving mechanism is used for driving the support to move, the lifting mechanism is connected to the support, the gas detector is connected to the lifting mechanism, and the lifting mechanism is used for driving the gas detector to lift. The application is convenient for gas detection at different height positions of the mine tunnel and has the effect of improving the gas detection range in the mine tunnel.

Description

Technical Field

[0001] This application relates to the field of coal mine gas measurement technology, and in particular to a gas detection device for safe coal mining. Background Technology

[0002] Working underground in coal mines is prone to various mining accidents due to geological conditions, toxic gases, and oxygen-deficient environments. Among these, gas explosions pose the greatest threat. Mine gas, primarily composed of coalbed methane, is a colorless, odorless, tasteless, flammable, and explosive gas that is a major threat to safe coal mine production. Therefore, it is essential to monitor gas concentrations during coal mining operations.

[0003] Currently, Chinese utility model patent CN216588736U discloses a gas measuring device for coal mine operation, including a mounting base with tracks on both sides and a measuring box on top. The measuring box contains a detection channel with a gas probe and a wind speed probe at the top. An axial flow fan is located at one end of the detection channel. A placement box is located on top of the measuring box, containing a gas sensor. The gas probe and wind speed probe are electrically connected to the gas sensor. An alarm is located on top of the placement box.

[0004] Regarding the aforementioned technologies, the inventors discovered that since the height of the gas measuring device is fixed, it can only detect the gas content at a specific height position in the mine tunnel during the gas detection process, making it difficult to detect the gas content at different height positions in the mine tunnel, resulting in a limited detection range for the gas measuring device. Summary of the Invention

[0005] To alleviate the problem of the limited detection range of gas measuring devices, this application provides a gas detection device for safe coal mining.

[0006] This application provides a gas detection device for safe coal mining, which adopts the following technical solution:

[0007] A gas detection device for safe coal mining includes a gas detector, a support, a drive mechanism, and a lifting mechanism. The support is slidably connected in the mine tunnel. The drive mechanism is connected to the support and is used to drive the support to move. The lifting mechanism is connected to the support, and the gas detector is connected to the lifting mechanism and is used to drive the gas detector to move up and down.

[0008] By adopting the above technical solution, the support is slidably connected in the mine tunnel. The support is moved by the drive mechanism, which in turn moves the gas detector along the length of the mine tunnel. At the same time, the gas detector is raised and lowered by the lifting mechanism, which allows the gas detector to detect gas at different heights in the mine tunnel, thereby improving the detection range of gas in the mine tunnel and ensuring the timeliness of gas detection.

[0009] Preferably, the lifting mechanism includes a support plate, a lifting rod, and a rotating assembly. The support plate is connected to the bracket, the lifting rod is hinged to the support plate, the gas detector is connected to the lifting rod, and the rotating assembly is connected to the support plate. The rotating assembly is connected to the lifting rod to drive the lifting rod to rotate.

[0010] By adopting the above technical solution, the gas detector can be moved by using the rotating component to drive the lifting rod to rotate, thereby adjusting the height of the gas detector. This allows the gas detector to detect the gas concentration at different heights in the mine tunnel, thus increasing the range of gas detection in the mine tunnel.

[0011] Preferably, the support plate is slidably connected to the bracket, the support plate slides along the width direction of the mine channel, and the bracket is provided with a transverse movement mechanism, which is connected to the support plate to drive the support plate to slide.

[0012] By adopting the above technical solution, the support plate is slidably connected to the bracket, and the gas detector can be moved by using the transverse mechanism to drive the support plate to move. This not only allows for height adjustment of the gas detector, but also enables the gas detector to move along the width of the mine roadway, thus improving the comprehensiveness of the gas detector's detection.

[0013] Preferably, the support is hollow, with an air inlet at the top and an air outlet located near the bottom. A first fan is installed on the support to supply air from the top of the mine tunnel into the interior of the support.

[0014] By adopting the above technical solution, the support structure is hollow. Since methane is less dense than air, it tends to accumulate at the top of the mine tunnel. When the methane detector detects a high methane content at the top of the tunnel, the first fan is activated to extract the air with a high methane content from the top of the tunnel and supply it into the support structure. The air is then discharged from the outlet along the support structure, achieving vertical air circulation within the tunnel. This dilutes the methane content at the top of the tunnel with the air at the bottom of the tunnel, resulting in a rapid reduction in the methane content in the air at the top of the tunnel. This reduces the potential danger caused by untimely methane discharge from the top of the tunnel.

[0015] Preferably, the support is provided with a dust suppression mechanism, which includes a water tank, a water pump, a water supply pipe, and an atomizing nozzle. The water tank is fixedly connected to the support, the water pump is fixedly connected to the water tank, the water pump is connected to the inside of the water tank, the water supply pipe is connected to the outlet of the water pump, and the end of the water supply pipe away from the water pump is connected to the atomizing nozzle. The atomizing nozzle is fixedly connected to the inside of the support.

[0016] By adopting the above technical solution, water is drawn from the water tank using a water pump and water supply pipe, and then supplied to the atomizing nozzle. The water mist is then sprayed out through the atomizing nozzle to treat the dust generated by the air circulation in the mine tunnel, thereby reducing dust pollution in the mine tunnel.

[0017] Preferably, the lifting rod includes a connecting part and a gripping part, the connecting part is hinged to the support plate, the gripping part is detachably connected to the gripping part, the rotating assembly is connected to the connecting part, and the gas detector is fixedly connected to the gripping part.

[0018] By adopting the above technical solution, the gripping part is detachably set on the connecting part. When a high concentration of methane is detected inside the mine tunnel, the staff can detach the gripping part from the connecting part and then hold the gripping part to detect the location near the wall, thus improving the flexibility of using the methane detection equipment.

[0019] Preferably, the grip is provided with a gas collection hood, which is sleeved on the outside of the gas detector. An exhaust plate is slidably connected inside the gas collection hood. The exhaust plate has a clearance hole for the gas detector to pass through. An exhaust hole is provided at the bottom of the gas collection hood. The grip is provided with a power assembly, which is connected to the exhaust plate to drive the exhaust plate to move.

[0020] By adopting the above technical solution, the gas collection hood is placed on the wall inside the mine tunnel. Then, the power unit is used to drive the exhaust plate to move towards the bottom of the gas collection hood, so that the residual gas inside the gas collection hood can be discharged from the gas collection hood. After standing for a certain period of time, by observing the change in the gas content inside the gas collection hood, it is possible to preliminarily determine whether it is a gas leak location, thereby reducing the impact of external airflow on gas detection at specific locations.

[0021] Preferably, the power assembly includes a pull rod, a first spring, and a locking member. The pull rod is fixedly connected to the exhaust plate and slidably connected to the air collection hood. The pull rod slides along the length of the grip portion. The first spring is disposed between the pull rod and the grip portion and applies a force to the exhaust plate away from the exhaust hole. The locking member is connected to the pull rod and is used to lock the pull rod.

[0022] By adopting the above technical solution, the push plate is located away from the exhaust hole under the push of the first spring. After the gas collection hood is installed on the mine tunnel wall, the pull rod is pulled down to compress the first spring and at the same time pull the push plate to move closer to the exhaust hole, thereby reducing the amount of residual air mixed in the gas collection hood.

[0023] Preferably, the gas collection hood is slidably connected to the grip, and a second spring is provided between the gas collection hood and the grip. The second spring applies a force to the gas collection hood to move it toward the gas detector, and the exhaust plate is used to push the gas collection hood to move it away from the gas detector.

[0024] By adopting the above technical solution, the gas collection hood is slidably connected to the grip. When automatically detecting the gas concentration in the mine tunnel, pulling the pull rod makes the exhaust plate fit against the bottom of the gas collection hood. Then, pulling the pull rod again will cause the exhaust plate to move the gas collection hood, thereby moving the gas collection hood to one side of the gas detector. Then, the locking part pull rod is used to lock it, reducing the possibility that the gas detector's gas detection in the mine tunnel will be affected by the obstruction of the gas collection hood.

[0025] In summary, this application includes at least the following beneficial technical effects:

[0026] 1. By sliding the support frame inside the mine tunnel, the gas detector can be moved along the length of the mine tunnel by using the drive mechanism to move the support frame. At the same time, the gas detector can be raised and lowered by the lifting mechanism, so that the gas detector can detect gas at different heights in the mine tunnel, thereby improving the gas detection range in the mine tunnel and ensuring the timeliness of gas detection.

[0027] 2. By sliding the support plate onto the bracket, the gas detector can be moved by using the transverse mechanism to drive the support plate. This allows for height adjustment of the gas detector and movement along the width of the mine roadway, improving the comprehensiveness of gas detection.

[0028] 3. By opening an air inlet at the top of the support, when a high methane content is detected at the top of the mine tunnel, the first fan is used to extract the air with a high methane content at the top of the mine tunnel and supply it into the support. Then, the air is discharged from the outlet along the support, which realizes the vertical circulation of air in the mine tunnel. This allows the air with a lower methane content at the bottom of the mine tunnel to dilute the air with a higher methane content at the top of the mine tunnel, thereby achieving a rapid reduction in the methane content in the air at the top of the mine tunnel. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the drive mechanism in the embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the transverse movement mechanism in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the lifting mechanism in the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of the internal structure of the bracket in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the dust collection mechanism in the embodiments of this application;

[0035] Figure 7 This is a schematic diagram of the power assembly structure in an embodiment of this application;

[0036] Figure 8 This is a cross-sectional structural diagram of the gas collection box in an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of the gas collection box in the extended state in an embodiment of this application.

[0038] Reference numerals: 100, bracket; 110, caster wheel; 120, guide rail; 130, air inlet; 140, air outlet; 150, first fan; 160, second fan; 200, drive mechanism; 210, first motor; 220, first gear; 230, rack; 300, gas detector; 400, lifting mechanism; 410, lifting rod; 411, connecting part; 412, gripping part; 413, threaded hole; 420, support plate; 430, rotating assembly; 431, second motor; 432, first... 500. Second gear; 510. Lateral movement mechanism; 520. Guide rod; 530. Roller; 540. Third motor; 600. Synchronous belt; 610. Dust suppression mechanism; 620. Water tank; 630. Water supply pipe; 640. Atomizing nozzle; 700. Gas collection hood; 710. Exhaust port; 720. Second spring; 800. Exhaust plate; 810. Power assembly; 811. Pull rod; 812. Connecting ring; 813. First spring; 814. Fixing plate; 815. Locking element; 816. Locking bolt. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0040] This application discloses a gas detection device for safe coal mining.

[0041] Reference Figure 1 and Figure 2 A gas detection device for safe coal mining includes a support frame 100, which is a gantry frame. Two sets of casters 110 are mounted on the bottom of the support frame 100, located near both sides of the support frame 100. The support frame 100 moves within the coal mine tunnel via these casters. A lifting mechanism 400 is mounted on the support frame 100, and a gas detector 300 is mounted on the lifting mechanism 400. The lifting mechanism 400 is used to raise and lower the gas detector 300. By using the lifting mechanism 400 to raise and lower the gas detector 300, the gas content at different heights within the mine tunnel can be detected, thus increasing the range of gas detection within the mine tunnel.

[0042] Reference Figure 2 Two guide rails 120 are fixedly connected to the ground of the mine tunnel. The two guide rails 120 are located near both sides of the mine tunnel. Two sets of movable wheels 110 on the support 100 are arranged corresponding to the two guide rails 120. Each set of movable wheels 110 includes multiple movable wheels 110. The multiple movable wheels 110 in the same set are spaced apart along the length of the guide rail 120, and each multiple movable wheel 110 in the same set is tactilely connected to its corresponding guide rail 120. A drive mechanism 200 is installed on the support 100 to drive the movement of the support 100.

[0043] The drive mechanism 200 includes two racks 230 respectively fixedly connected to two guide rails 120. The racks 230 are arranged along the length of the guide rails 120 to which they are fixedly connected. Two first motors 210 are fixedly connected to the support 100. Each first motor 210 has a first gear 220 coaxially fixedly connected to its main shaft. The two first gears 220 are arranged one-to-one with the two racks 230, and the first gears 220 mesh with their corresponding racks 230. By using the two first motors 210 to drive the two first gears 220 to rotate, the support 100 can be driven by the cooperation of the two racks 230. This eliminates the need for manual pushing of the support 100, enabling automated detection of multiple locations within the mine tunnel.

[0044] Reference Figure 2 , Figure 3 and Figure 4 The lifting mechanism 400 includes a support plate 420 mounted on the bracket 100. A lifting rod 410 is hinged to the support plate 420, with one end of the lifting rod 410 hinged to the support plate 420. The hinge axis between the lifting rod 410 and the support plate 420 is parallel to the width direction of the mine channel. A gas detector 300 is mounted on the end of the lifting rod 410 away from the support plate 420. A rotating assembly 430 is mounted on the support plate 420, which drives the rotation of the lifting rod 410.

[0045] The lifting rod 410 is hinged to the support plate 420 via a rotating rod. The rotating rod is fixedly connected to the lifting rod 410 and rotatably connected to the support plate 420. The rotating assembly 430 includes a second motor 431 fixedly connected to the support plate 420. A second gear 432 is coaxially fixed to the main shaft of the second motor 431. Another second gear 432 is coaxially fixedly connected to the rotating rod, and the two second gears 432 mesh with each other. By mounting the gas detector 300 on the lifting rod 410, the rotation of the main shaft of the second motor 431 drives the second gear 432, which is coaxially fixed to it, to rotate. The meshing of the two second gears 432 drives the rotating rod to rotate, which in turn drives the lifting rod 410 to rotate, thus moving the gas detector 300 and adjusting its height so that the gas detector 300 can detect the gas concentration at different heights in the mine tunnel.

[0046] Reference Figure 2 and Figure 4 To further improve the detection range of gas in the mine tunnel, the support plate 420 is slidably connected to the bracket 100. The support plate 420 slides along the width direction of the mine tunnel. A transverse movement mechanism 500 is installed on the bracket 100. The transverse movement mechanism 500 includes two guide rods 510 fixedly connected to the bracket 100. Both guide rods 510 are set along the width direction of the mine tunnel. Both guide rods 510 pass through the support plate 420. The support plate 420 is slidably connected to the two guide rods 510. Two rollers 520 are rotatably connected to the support 100, located near both sides of the support 100. The axes of the two rollers 520 are parallel. A third motor 530 is fixedly connected to the support 100, with its main shaft coaxially fixedly connected to one of the rollers 520. A synchronous belt 540 is fitted around the outer sides of both rollers 520, and the two rollers 520 are connected via the synchronous belt 540. The synchronous belt 540 is fixedly connected to the support plate 420. By driving the coaxially fixed roller 520 to rotate using the third motor 530, the synchronous belt 540 is driven to rotate, causing the support plate 420 to slide. This allows the gas detector 300 to move along the width of the mine tunnel, enabling the gas sensor to detect gas at various locations within the mine tunnel and improving the comprehensiveness of gas detection within the mine tunnel.

[0047] Reference Figure 2 and Figure 5Because methane is less dense than air, it tends to accumulate at the top of the mine tunnel, leading to excessively high methane levels. When the methane content in the air is too high, it can ignite and cause an explosion, resulting in an accident. To promptly alleviate the methane content at the top of the mine tunnel, the support frame 100 is hollow, with an air inlet 130 at its top. A first fan 150 is fixedly connected to the support frame 100, located within the air inlet 130. The first fan 150 draws air from the top of the mine tunnel and supplies it into the support frame 100. The bracket 100 has two air outlets 140, both of which are located near the bottom of the bracket 100 and are located near the two sides of the bracket 100 respectively. Two second fans 160 are fixedly connected to the bracket 100, and the two second fans 160 are arranged one-to-one with the two air outlets 140. The second fan 160 is located in its corresponding air outlet 140. When a high methane concentration is detected at the top of the mine tunnel, the first fan 150 and the two second fans 160 are activated. The first fan 150 and the two second fans 160 draw the air with a high methane concentration at the top of the mine tunnel into the support 100, and then discharge it to the bottom of the mine tunnel through two air outlets 140 opened at the bottom of the support 100. The air with a lower methane concentration at the bottom of the mine tunnel dilutes the methane concentration at the top of the mine tunnel. The methane concentration at the top of the mine tunnel is rapidly diluted and reduced through the vertical air circulation in the mine tunnel. Then, the ventilation system is connected to extract and discharge the methane in the mine tunnel, reducing the possibility of danger caused by untimely methane discharge due to the long time spent in the process of connecting to the ventilation system.

[0048] Reference Figure 5 and Figure 6 During the operation of the first fan 150 and the two second fans 160, a lot of dust is often raised, resulting in significant dust pollution in the mine tunnel. In order to reduce dust pollution in the mine tunnel, a dust suppression mechanism 600 is installed on the support 100.

[0049] The dust suppression mechanism 600 includes a water tank 610 fixedly connected to one side of a support 100. A connecting pipe is fixedly connected to the water tank 610, communicating with the interior of the water tank 610. A water pump 620 is fixedly connected to the end of the connecting pipe away from the water tank 610. The connecting pipe is connected to the inlet of the water pump 620, and the outlet of the water pump 620 is connected to a water supply pipe 630. The end of the water supply pipe 630 away from the water pump 620 passes through the support 100 and connects to an atomizing nozzle 640, which is located inside the support 100. During the gas circulation and dilution process, the water pump 620 pumps water from the water tank 610 into the atomizing nozzle 640, and then the water is atomized and sprayed out through the atomizing nozzle 640. The water mist combines with the dust in the mine tunnel to reduce dust pollution in the mine tunnel.

[0050] Reference Figure 2 and Figure 7 To facilitate the detection of gas leak locations within the mine tunnel, the lifting rod 410 includes a connecting part 411 and a gripping part 412. The connecting part 411 is hinged to the support plate 420, and the gripping part 412 is coaxially arranged with the connecting part 411. The connecting part 411 has threads on its outer side, located near the end of the connecting part 411 away from the support plate 420. One end of the gripping part 412 has a threaded hole 413, which matches the thread on the connecting part 411. A gas sensor is fixedly connected to the end of the gripping part 412 away from the connecting part 411. After detecting an abnormal gas content inside the mine tunnel, the relevant personnel enter the mine tunnel and rotate the gripping part 412 to detach it and the gas detector 300 from the connecting part 411. Then, holding the gripping part 412 close to the mine tunnel wall, the gas leak location can be determined by detecting the gas content at different locations on the mine tunnel wall, improving the flexibility of the detection device.

[0051] Reference Figure 7 , Figure 8 and Figure 9A gas collecting cover 700 is fitted on the outer side of the grip 412. The gas collecting cover 700 is slidably connected to the grip 412. A second spring 720 is fitted on the outer side of the grip 412. One end of the second spring 720 is fixedly connected to the gas collecting cover 700, and the other end of the second spring 720 is fixedly connected to the grip 412. The gas collecting cover 700 covers the outer side of the gas detector 300 under the push of the second spring 720. The bottom of the air collection hood 700 has two exhaust holes 710. An exhaust plate 800 is slidably connected inside the air collection hood 700. The exhaust plate 800 slides along the length of the grip part 412. A power assembly 810 is installed on the grip part 412. The power assembly 810 includes two pull rods 811 fixedly connected to the exhaust plate 800. The two pull rods 811 are both arranged parallel to the grip part 412. The two pull rods 811 are located on opposite sides of the grip part 412. After the two pull rods 811 pass through the bottom of the air collection hood 700, they are fixedly connected to a connecting ring 812. The two pull rods 811 are slidably connected to the air collection hood 700. The connecting ring 812 is sleeved on the outside of the grip part 412. Each pull rod 811 is fitted with a first spring 813 on its outer side. A fixing plate 814 is fixedly connected to the grip 412. Both pull rods 811 are slidably connected to the fixing plate 814. One end of each first spring 813 is fixedly connected to the connecting ring 812, and the other end of each first spring 813 is fixedly connected to the fixing plate 814. The first spring 813 applies a force to the connecting ring 812 in a direction close to the fixing plate 814. A locking element 815, which is a locking bolt 816, is installed on the connecting ring 812. The locking bolt 816 passes through the connecting ring 812 and is threadedly connected to the connecting ring 812. A locking hole adapted to the locking bolt 816 is provided on the grip 412.When the drive bracket 100 moves to automatically detect gas in the mine tunnel, pulling down the exhaust plate 800 so that it abuts against the bottom of the gas collection hood 700, and then continuing to pull the pull rod 811, will cause the exhaust plate 800 to move the gas collection hood 700 along the length of the grip 412, thereby moving the gas collection hood 700 to the side of the gas detector 300 near the bottom, exposing the gas detector 300 in the mine tunnel to ensure the detection of gas concentration inside the mine tunnel; when initially determining the location of the gas leak, after releasing the locking bolt 816 from the connecting ring 812, the grip 412 is detached from the connecting part 411, and the gas collection hood 700 is covered by the second spring 720. The gas detector 300 is positioned outside the gas vent plate 800, and the vent plate 800 is located near the opening of the gas collection hood 700 under the push of the first spring 813. When initially determining the location of a gas leak, the gas collection hood 700 is lowered to cover the wall inside the mine tunnel, and then the pulling rod 811 is pulled down. The pulling rod 811 moves the vent plate 800 towards the bottom of the gas collection hood 700, allowing the residual gas inside the gas collection hood 700 to be discharged. Then, the gas content at the corresponding location can be measured, reducing the possibility that the air flowing in the mine tunnel will affect the gas detection. After standing for a certain period of time, by observing the change in the gas content inside the gas collection hood 700, it can be preliminarily determined whether it is a gas leak location.

[0052] The implementation principle of a gas detection device for safe coal mining according to an embodiment of this application is as follows: By sliding a support 100 inside the mine tunnel, and using a first motor 210 to drive the support 100 to move to different positions, then starting a second motor 431, the height of the gas detector 300 fixedly connected to the lifting rod 410 can be adjusted by driving the lifting rod 410 to rotate, thereby enabling gas detection at different heights in the mine tunnel; during the detection process, a third motor 530 is started, and the support plate 420 is driven to move laterally by the third motor 530, which can move the gas detector 300 along the width direction of the mine tunnel, further increasing the range of gas detection inside the mine tunnel, improving the comprehensiveness of gas detection by the gas detector 300, and realizing automated gas detection.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas detection device for safe mining of coal mines, characterized in that: The utility model relates to a gas detector (300), support (100), drive mechanism (200) and elevating system (400), support (100) sliding connection is in the mine, drive mechanism (200) is connected on support (100), drive mechanism (200) is used for driving support (100) moves, elevating system (400) is connected on support (100), gas detector (300) is connected on elevating system (400), elevating system (400) is used for driving gas detector (300) elevates and falls; The elevating system (400) includes a support plate (420), a lifting rod (410), and a rotating assembly (430). The support plate (420) is slidingly connected to the support (100) and slides along the width direction of the mine. The lifting rod (410) is hingedly connected to the support plate (420), and the gas detector (300) is connected to the lifting rod (410). The rotating assembly (430) is connected to the support plate (420) and is connected to the lifting rod (410) to drive the lifting rod (410) to rotate. The lifting rod (410) includes a connecting portion (411) and a holding portion (412). The connecting portion (411) is hingedly connected to the support plate (420), and the holding portion (412) is detachably connected to the holding portion (412). The rotating assembly (430) is connected to the connecting portion (411), and the gas detector (300) is fixedly connected to the holding portion (412). The holding portion (412) is provided with a gas collecting hood (700) which is sleeved outside the gas detector (300). An exhaust plate (800) is slidingly connected in the gas collecting hood (700). The exhaust plate (800) has a clearance hole for the gas detector (300) to pass through. The bottom of the gas collecting hood (700) has an exhaust hole (710). A power assembly (810) is arranged on the holding portion (412) and is connected to the exhaust plate (800) to drive the exhaust plate (800) to move. The power assembly (810) includes a pulling rod (811), a first spring (813), and a locking member (815). The pulling rod (811) is fixedly connected to the exhaust plate (800) and slidingly connected to the gas collecting hood (700). The pulling rod (811) slides along the length direction of the holding portion (412). The first spring (813) is arranged between the pulling rod (811) and the holding portion (412) and applies a force to the exhaust plate (800) away from the exhaust hole (710). The locking member (815) is connected to the pulling rod (811) and is used to lock the pulling rod (811). The gas collecting cover (700) is slidingly connected to the holding part (412), a second spring (720) is arranged between the gas collecting cover (700) and the holding part (412), the second spring (720) applies a force to the gas collecting cover (700) to move in the direction close to the gas detector (300), and the exhaust plate (800) is used to push the gas collecting cover (700) to move in the direction away from the gas detector (300).

2. The gas detection device for safe mining of coal mines according to claim 1, characterized in that: The support (100) is provided with a horizontal moving mechanism (500), the horizontal moving mechanism (500) is connected with the support plate (420) to drive the support plate (420) to slide.

3. The gas detection device for safe mining of coal mines according to claim 1, characterized in that: The support (100) is hollow, the top of the support (100) is provided with an air inlet (130), the support (100) is provided with an air outlet (140) close to the bottom of the support (100), and the support (100) is provided with a first fan (150) for supplying air at the top of the mine to the inside of the support (100).

4. The gas detection device for safe mining of coal mines according to claim 3, characterized in that: The support (100) is provided with a dust falling mechanism (600), the dust falling mechanism (600) comprises a water tank (610), a water pump (620), a water supply pipe (630) and an atomizing nozzle (640), the water tank (610) is fixedly connected to the support (100), the water pump (620) is fixedly connected to the water tank (610), the water pump (620) is in communication with the inside of the water tank (610), the water supply pipe (630) is in communication with the water outlet of the water pump (620), one end of the water supply pipe (630) away from the water pump (620) is in communication with the atomizing nozzle (640), and the atomizing nozzle (640) is fixedly connected to the inside of the support (100).

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