Ventilation detection device for mine

Abstract

The invention belongs to the technical field of ventilation detection, and particularly discloses a ventilation detection device for a mine, which comprises a slow release mechanism, an automatic energy storage mechanism and a gas sampling mechanism, the slow release mechanism comprises a bottom shell, an alternate stopping assembly and a resistance adjusting assembly, the resistance adjusting assembly is arranged in the bottom shell, and the automatic energy storage mechanism is arranged in the bottom shell. The alternate stopping assembly is arranged in the resistance adjusting assembly in a sliding mode, the automatic energy storage mechanism is arranged on the bottom shell, and the gas sampling mechanism is arranged on the automatic energy storage mechanism. In order to overcome the technical contradiction that the friction force cannot be too large or too small, the invention creatively provides a slow-release mechanism from an escapement mechanism of a mechanical watch, slow rotation of a central screw can be realized through alternate pushing of two groups of turntables to two sliding rods, and then slow release of the elastic force of a coil spring is realized. Therefore, the technical target of prolonging the gas sampling time period is achieved.

Description

Technical Field

[0001] This invention belongs to the field of ventilation detection technology, specifically referring to a ventilation detection device for mines. Background Technology

[0002] Since the interior of a mine is relatively enclosed, its ventilation performance is a very important safety indicator. During the acceptance process after the ventilation equipment is installed, as well as during subsequent maintenance, it is often necessary to test the ventilation effect in the mine.

[0003] Current airflow detection methods typically measure the airflow velocity at the target location. However, this testing method is not rigorous because airflow does not necessarily flow entirely to the outside; some of it is internal vortex within the mine. Furthermore, the local gas velocity is not directly proportional to the overall ventilation flow rate.

[0004] To address the aforementioned problems, this invention proposes a portable testing device that releases a marker gas within a mine and then samples the gas at different times and locations to analyze changes in the marker gas concentration. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a ventilation detection device for mines. By marking the pressure of the gas itself when it is released, the sampling device can accumulate elastic potential energy and drive the sampling port to open. After the gas release is completed, the sampling device can be driven to retract by the elastic force of the coil spring, thereby completing the gas sampling. To enable the gas and spring to drive the gas sampling mechanism, the frictional force of the gas sampling mechanism needs to be designed to be small. However, a small frictional force will cause the elastic potential energy of the spring to be released quickly. To overcome this technical contradiction, this invention draws inspiration from the escapement mechanism of a mechanical watch and creatively proposes a slow-release mechanism. By alternately pushing two sliding rods with two sets of turntables, the central screw can be slowly rotated, thereby achieving the slow release of the spring force and thus achieving the technical goal of extending the gas sampling period.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a ventilation detection device for mines, including a slow-release mechanism, an automatic energy storage mechanism and a gas sampling mechanism. The slow-release mechanism includes a bottom shell, an alternating stop assembly and a resistance adjustment assembly. The resistance adjustment assembly is disposed in the bottom shell, the alternating stop assembly is slidably disposed in the resistance adjustment assembly, the automatic energy storage mechanism is disposed on the bottom shell, and the gas sampling mechanism is disposed on the automatic energy storage mechanism.

[0007] Furthermore, the automatic energy storage mechanism includes an energy storage chamber, a central screw, a turbofan, and a coil spring. The energy storage chamber is located on the bottom outer shell, the central screw is rotatably located at the center of the energy storage chamber, the turbofan is fixed to the central screw, one end of the coil spring is fixed to the central screw, and the other end of the coil spring is fixed to the bottom outer shell.

[0008] When the airflow passes rapidly through the turbofan, it drives the turbofan and the central screw to rotate. On the one hand, this extends the sampling piston from the sampling sleeve, creating conditions for subsequent gas sample collection. On the other hand, as the central screw rotates, it also causes the coil spring to undergo elastic deformation and accumulate elastic force, thereby driving the slow-release mechanism to move after the airflow stops.

[0009] Furthermore, the gas sampling mechanism includes a sampling sleeve mounted on the energy storage chamber. The bottom of the sampling sleeve is provided with a stud bracket, and a stud bearing is provided on the stud bracket. The central screw is fixedly connected to the inner ring of the stud bearing.

[0010] The central screw can be supported by a stud bearing.

[0011] Preferably, the alternating stop assembly includes two turntables, which are fixed to a central screw. The turntables are provided with evenly distributed stop teeth in a ring, and the stop teeth on the two turntables are alternately distributed in the axial direction.

[0012] As a further preferred embodiment of the present invention, the alternating stop assembly further includes a sliding rod, a linkage rod, and a linkage pin. The sliding rod is provided in two sets, one end of the sliding rod is provided with an inclined surface that matches the stop tooth, the linkage pin is fixed to the bottom outer shell, the linkage rod is rotatably mounted on the linkage pin, the two ends of the linkage rod are symmetrically provided with waist-shaped grooves, and the round rod at the other end of the sliding rod is slidably mounted in the waist-shaped groove. The two sliding rods alternately extend and retract under the linkage of the linkage rod.

[0013] The stop teeth on the two turntables are alternately distributed, and the two sliding rods extend and retract alternately. Therefore, when the stop tooth on one turntable passes the sliding rod and pushes it back, the other sliding rod will extend. Thus, when the stop tooth on the other turntable rotates to that angle, it will also strike and push the sliding rod. Through the alternating impact, this structure is an improvement on the escapement mechanism. It has the technical purpose of transforming the original fast and continuous rotational motion into slow and intermittent rotational motion, thereby achieving the technical effect of slowly releasing potential energy.

[0014] Furthermore, the resistance adjustment assembly includes a fixed slide and a floating slide. The fixed slide is fixed to the inner wall of the bottom housing and has an inner liner. The sliding rod is engaged and slidably disposed between the inner liner and the floating slide.

[0015] Preferably, the fixed slide is provided with a threaded hole, the resistance adjustment assembly further includes an adjustment stud and a resistance spring, the adjustment stud and the threaded hole are threadedly connected, the floating slide is provided with a flange, and the resistance spring is disposed between the floating slide and the flange.

[0016] The sliding of the sliding rod can be limited by the fixed slide and the floating slide. By rotating the adjusting screw, the compression of the resistance spring can be adjusted, thereby changing the squeezing force of the fixed slide and the floating slide on the sliding rod, and thus changing the sliding resistance of the sliding rod, thereby achieving the technical effect of adjusting the slow release speed within a certain range.

[0017] Furthermore, it also includes a gas storage assembly, which includes a compressed gas tank, a solenoid valve, and a gas delivery pipeline. The solenoid valve is located on the compressed gas tank and has an array of gas supply connectors. One end of the energy storage chamber has a connector, and the gas delivery pipeline is located between the bottom outer shell and the connector.

[0018] The solenoid valve is equipped with several air supply connectors, each of which can be connected to a sample collection device, thereby achieving the technical effect of simultaneous sample collection and control at different locations in the mine.

[0019] Preferably, the gas sampling mechanism further includes a central sleeve and a sampling piston. A sampling nut is provided at the center of the central sleeve, and the sampling nut and the central screw are driven by a thread. The sampling piston array is provided on the central sleeve. The outer ring of the sampling piston is provided with a flexible sealing skirt that slides in contact with the sampling sleeve. A connecting post for connection is also provided between the sampling pistons.

[0020] The number of sampling pistons can be freely designed, and independent storage spaces are separated between adjacent sampling pistons, enabling the collection of gas samples from the same location at different times, thus facilitating subsequent analysis and comparison.

[0021] The labeling gas should be a type of gas that is non-toxic to humans and the environment.

[0022] The beneficial effects achieved by the present invention using the above structure are as follows: (1) When the airflow passes through the turbofan quickly, it will drive the turbofan and the central screw to rotate. On the one hand, it will extend the sampling piston from the sampling sleeve to create conditions for subsequent gas sample collection. On the other hand, the central screw will also cause the coil spring to undergo elastic deformation and accumulate elastic force while rotating, thereby driving the slow release mechanism to move after the airflow stops.

[0023] (2) The stop teeth on the two turntables are alternately distributed, and the two sliding rods extend and retract alternately. Therefore, when the stop tooth on one turntable passes the sliding rod and pushes the sliding rod back, the other sliding rod will extend. Therefore, when the stop tooth on the other turntable rotates to that angle, it will also hit and push the sliding rod. Through the alternating impact, this structure is an improvement of the escapement mechanism. It has the technical purpose of transforming the original fast and continuous rotational motion into a slow and intermittent rotational motion, thereby achieving the technical effect of slowly releasing potential energy.

[0024] (3) The sliding of the sliding rod can be limited by the fixed slide and the floating slide. The compression of the resistance spring can be adjusted by rotating the adjusting screw, thereby changing the squeezing force of the fixed slide and the floating slide on the sliding rod, and thus changing the sliding resistance of the sliding rod, thereby achieving the technical effect of adjusting the slow release speed within a certain range.

[0025] (4) The solenoid valve is equipped with several air supply connectors. Each air supply connector can be connected to a sample collection device, thereby achieving the technical effect of simultaneous sample collection and control at different locations in the mine.

[0026] (5) The number of sampling pistons can be freely designed. Adjacent sampling pistons are separated by independent storage space, which enables the collection of gas samples at the same location at different times, thus facilitating subsequent analysis and comparison. Attached Figure Description

[0027] Figure 1 This is a perspective view of a ventilation detection device for mines proposed in this invention; Figure 2 This is a front view of a ventilation detection device for mines proposed in this invention; Figure 3 for Figure 2 A cross-sectional view along section line AA; Figure 4 for Figure 3 A cross-sectional view along the cutting line BB; Figure 5 This is a half-sectional structural diagram of a ventilation detection device for mines proposed in this invention. Figure 6 This is an exploded structural diagram of a ventilation detection device for mines proposed in this invention; Figure 7 for Figure 4 A magnified view of a section at point I; Figure 8 for Figure 3 Enlarged view of a section at point II; Figure 9 for Figure 3 Enlarged view of a section at point III; Figure 10 for Figure 5 A magnified view of a section at point IV; Figure 11 for Figure 6 A magnified view of section V.

[0028] The components are as follows: 1. Gas storage assembly; 2. Slow-release mechanism; 3. Automatic energy storage mechanism; 4. Gas sampling mechanism; 5. Compressed gas tank; 6. Solenoid valve; 7. Gas pipeline; 8. Gas supply connector; 9. Bottom shell; 10. Alternating stop assembly; 11. Resistance adjustment assembly; 12. Turntable; 13. Sliding rod; 14. Linkage rod; 15. Linkage pin; 16. Fixed slide; 17. Floating slide; 18. Adjusting stud; 19. Resistance spring; 20. Stop tooth; 21. Liner; 22. Threaded hole; 23. Flange; 24. Energy storage chamber; 25. Central screw; 26. Turbine fan; 27. Coil spring; 28. Exhaust window; 29. ​​Connector; 30. Sampling sleeve; 31. Central sleeve; 32. Sampling piston; 33. Stud bracket; 34. Sampling nut; 35. Flexible sealing skirt; 36. Connecting column; 37. Stud bearing.

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] like Figures 1-11As shown, the present invention proposes a ventilation detection device for mines, including a slow-release mechanism 2, an automatic energy storage mechanism 3, and a gas sampling mechanism 4. The slow-release mechanism 2 includes a bottom shell 9, an alternating stop assembly 10, and a resistance adjustment assembly 11. The resistance adjustment assembly 11 is disposed in the bottom shell 9, and the alternating stop assembly 10 is slidably disposed in the resistance adjustment assembly 11. The automatic energy storage mechanism 3 is disposed on the bottom shell 9, and the gas sampling mechanism 4 is disposed on the automatic energy storage mechanism 3.

[0033] The automatic energy storage mechanism 3 includes an energy storage chamber 24, a central screw 25, a turbine fan 26, and a coil spring 27. The energy storage chamber 24 is located on the bottom outer shell 9. The central screw 25 is rotatably located at the center of the energy storage chamber 24. The turbine fan 26 is fixed to the central screw 25. One end of the coil spring 27 is fixed to the central screw 25, and the other end of the coil spring 27 is fixed to the bottom outer shell 9.

[0034] When the airflow passes rapidly through the turbofan 26, it will drive the turbofan 26 and the central screw 25 to rotate. On the one hand, it will extend the sampling piston 32 from the sampling sleeve 30, creating conditions for subsequent gas sample collection. On the other hand, while the central screw 25 is rotating, it will also cause the coil spring 27 to undergo elastic deformation and accumulate elastic force, thereby driving the slow-release mechanism 2 to move after the airflow stops.

[0035] The gas sampling mechanism 4 includes a sampling sleeve 30, which is mounted on the energy storage chamber 24. A stud bracket 33 is provided at the bottom of the sampling sleeve 30, and a stud bearing 37 is provided on the stud bracket 33. The central screw 25 is fixed in the inner ring of the stud bearing 37.

[0036] The central screw 25 can be supported by the stud bearing 37.

[0037] The alternating stop assembly 10 includes two turntables 12. The turntables 12 are fixed to the central screw 25. The turntables 12 are evenly distributed with stop teeth 20 in a ring. The stop teeth 20 on the two turntables 12 are alternately distributed in the axial direction.

[0038] The alternating stop assembly 10 also includes a sliding rod 13, a linkage rod 14, and a linkage pin 15. There are two sets of sliding rods 13. One end of the sliding rod 13 is provided with an inclined surface that matches the stop tooth 20. The linkage pin 15 is fixed to the bottom housing 9. The linkage rod 14 is rotatably mounted on the linkage pin 15. The two ends of the linkage rod 14 are symmetrically provided with waist-shaped grooves. The round rod at the other end of the sliding rod 13 is slidably mounted in the waist-shaped groove. The two sliding rods 13 alternately extend and retract under the linkage of the linkage rod 14.

[0039] The stop teeth 20 on the two turntables 12 are alternately distributed, and the two sliding rods 13 extend and retract alternately. Therefore, when the stop tooth 20 on one turntable 12 passes the sliding rod 13 and pushes the sliding rod 13 back, the other sliding rod 13 will extend. Therefore, when the stop tooth 20 on the other turntable 12 rotates to that angle, it will also hit and push the sliding rod 13. Through the alternating impact, this structure is an improvement on the escapement mechanism. It has the technical purpose of transforming the original fast and continuous rotational motion into slow and intermittent rotational motion, thereby achieving the technical effect of slowly releasing potential energy.

[0040] The resistance adjustment assembly 11 includes a fixed slide 16 and a floating slide 17. The fixed slide 16 is fixed to the inner wall of the bottom housing 9. The fixed slide 16 is provided with an inner liner 21. The sliding rod 13 is engaged and slidably disposed between the inner liner 21 and the floating slide 17.

[0041] The fixed slide 16 is provided with a threaded hole 22. The resistance adjustment assembly 11 also includes an adjusting stud 18 and a resistance spring 19. The adjusting stud 18 and the threaded hole 22 are threadedly connected. The floating slide 17 is provided with a flange 23. The resistance spring 19 is located between the floating slide 17 and the flange 23.

[0042] The sliding of the sliding rod 13 can be limited by the fixed slide 16 and the floating slide 17. By rotating the adjusting screw 18, the compression of the resistance spring 19 can be adjusted, thereby changing the squeezing force of the fixed slide 16 and the floating slide 17 on the sliding rod 13, and thus changing the sliding resistance of the sliding rod 13, thereby achieving the technical effect of adjusting the slow release speed within a certain range.

[0043] It also includes a gas storage component 1, which includes a compressed gas tank 5, a solenoid valve 6 and a gas delivery pipe 7. The solenoid valve 6 is located on the compressed gas tank 5, and an array of gas supply connectors 8 are provided on the solenoid valve 6. One end of the energy storage chamber 24 is provided with a connector 29, and the gas delivery pipe 7 is located between the bottom outer shell 9 and the connector 29.

[0044] The solenoid valve 6 is equipped with several air supply connectors 8, each of which can be connected to a sample collection device, thereby achieving the technical effect of simultaneous sample collection and control at different locations in the mine.

[0045] The gas sampling mechanism 4 also includes a central sleeve 31 and a sampling piston 32. A sampling nut 34 is provided at the center of the central sleeve 31. The sampling nut 34 and the central screw 25 are threadedly driven. The sampling pistons 32 are arranged in an array on the central sleeve 31. The outer ring of the sampling pistons 32 is provided with a flexible sealing skirt 35 that slides in contact with the sampling sleeve 30. A connecting post 36 for connection is also provided between the sampling pistons 32.

[0046] The number of sampling pistons 32 can be freely designed. Adjacent sampling pistons 32 are separated by independent storage spaces, which enables the collection of gas samples from the same location at different times, thus facilitating subsequent analysis and comparison.

[0047] In practical use, the user first needs to place the combination of multiple slow-release mechanisms 2, automatic energy storage mechanisms 3 and gas sampling mechanisms 4 at the target location to be sampled. Then, the connection between the gas supply connector 8 and the connector 29 is completed through the gas supply pipeline 7. The gas storage component 1 has relatively low requirements for its placement location, as long as it is convenient to connect the gas supply pipeline 7. The solenoid valve 6 can be remotely controlled from outside the mine. The compressed gas tank 5 stores compressed gas inside. The type of gas can be carbon dioxide, oxygen or other gases whose concentration is easy to measure (referred to as marker gas in the following embodiment). During measurement, for safety and to reduce impact, the operator should retreat to the outside of the mine.

[0048] At the start of the measurement, the solenoid valve 6 is opened by the remote control device. Only when the gas supply connector 8 connected to the gas supply pipe 7 is in the open state can the gas in the compressed gas tank 5 be delivered to the energy storage chamber 24 through the gas supply pipe 7. The gas supply pipe 7 is closed and the gas cannot pass through.

[0049] After the marking gas enters the energy storage chamber 24 through the gas pipeline 7, it is discharged through the exhaust window 28. Since the turbo fan 26 is located between the exhaust window 28 and the connector 29, the gas will drive the turbo fan 26 to rotate as it flows from bottom to top in the energy storage chamber 24, thereby rotating the central screw 25. When the central screw 25 rotates, on the one hand, it drives the central sleeve 31 and the sampling piston 32 to extend out of the sampling sleeve 30 through the threaded engagement with the sampling nut 34; on the other hand, the rotation of the central screw 25 also causes the coil spring 27 to undergo elastic deformation and accumulate elastic force.

[0050] Whether the turbofan 26 can be driven smoothly depends on the internal pressure of the compressed air tank 5 and the design of the turbofan 26, as well as the transmission resistance of the energy storage chamber 24 and the sampling nut 34. The pressure of the compressed air tank 5 can be freely controlled, and if necessary, the number of turbofans 26 and the density and tilt angle of the blades can be appropriately increased. At the same time, the internal contact form of the sampling nut 34 can also adopt a low-resistance contact form such as ball bearings to ensure smooth driving.

[0051] Once the gas release meets the requirements, the concentration of the marker gas in the mine will increase. However, as the air flows, the concentration of the marker gas will gradually return to normal. The worse the ventilation in the mine, the slower the rate at which this concentration decreases and recovers.

[0052] After the solenoid valve 6 is closed, the turbine fan 26 stops rotating. Then, under the elastic force of the coil spring 27, the central screw 25 tends to rotate in the opposite direction to reset, and at the same time, it rotates with the two discs 12. Since the stop teeth 20 on the two discs 12 are alternately distributed and the two sliding rods 13 extend and retract alternately, when the stop tooth 20 on one disc 12 passes the sliding rod 13 and pushes the sliding rod 13 back, the other sliding rod 13 will extend. Therefore, when the stop tooth 20 on the other disc 12 rotates to that angle, it will also hit and push the sliding rod 13. Through the alternating impact, this structure is an improvement on the escapement mechanism in mechanical watches. It has the technical purpose of transforming the original fast and continuous rotational motion into a slow and intermittent rotational motion, thereby achieving the technical effect of slowly releasing potential energy.

[0053] As the central screw 25 rotates slowly, the central sleeve 31 and the sampling piston 32 gradually retract into the sampling sleeve 30. The flexible sealing skirt 35 can reduce the sliding resistance between itself and the sampling sleeve 30 while sealing. If two adjacent sampling pistons 32 retract into the sampling sleeve 30, they will form a closed area together with the sampling sleeve 30, thus completing the gas sampling at that location and time period. Since multiple sampling pistons 32 have multiple layers, gas sampling at multiple time periods at that location can be completed after all sampling pistons 32 retract into the sampling sleeve 30.

[0054] After sampling is completed and the gas pipeline 7 is removed, the concentration of the target gas can be detected in gas samples from different locations and at multiple time periods, and the results can be analyzed to determine the overall ventilation of the mine and the differences in ventilation at each sampling location.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A ventilation detection device for mines, characterized in that: The system includes a slow-release mechanism (2), an automatic energy storage mechanism (3), and a gas sampling mechanism (4). The slow-release mechanism (2) includes a bottom shell (9), an alternating stop assembly (10), and a resistance adjustment assembly (11). The resistance adjustment assembly (11) is located in the bottom shell (9), the alternating stop assembly (10) is slidably located in the resistance adjustment assembly (11), the automatic energy storage mechanism (3) is located on the bottom shell (9), and the gas sampling mechanism (4) is located on the automatic energy storage mechanism (3). The automatic energy storage mechanism (3) includes an energy storage chamber (24), a central screw (25), a turbofan (26), and a coil spring (27). The energy storage chamber (24) is located on the bottom outer shell (9). The central screw (25) is rotatably located at the center of the energy storage chamber (24). The turbofan (26) is fixed to the central screw (25). One end of the coil spring (27) is fixed to the central screw (25), and the other end of the coil spring (27) is fixed to the bottom outer shell (9).

2. The ventilation detection device for mines according to claim 1, characterized in that: The gas sampling mechanism (4) includes a sampling sleeve (30), which is located on the energy storage chamber (24). The bottom of the sampling sleeve (30) is provided with a stud bracket (33), and a stud bearing (37) is provided on the stud bracket (33). The central screw (25) is fixed in the inner ring of the stud bearing (37).

3. A ventilation detection device for mines according to claim 2, characterized in that: The alternating stop assembly (10) includes a turntable (12), two turntables (12) are provided, the turntables (12) are fixed to the central screw (25), and the turntables (12) are evenly distributed with stop teeth (20) in a ring, and the stop teeth (20) on the two turntables (12) are alternately distributed in the axial direction.

4. A ventilation detection device for mines according to claim 3, characterized in that: The alternating stop assembly (10) also includes a sliding rod (13), a linkage rod (14), and a linkage pin (15). The sliding rod (13) is provided in two sets. One end of the sliding rod (13) is provided with an inclined surface that matches the stop tooth (20). The linkage pin (15) is fixed to the bottom outer shell (9). The linkage rod (14) is rotatably mounted on the linkage pin (15). The two ends of the linkage rod (14) are symmetrically provided with waist-shaped grooves. The round rod at the other end of the sliding rod (13) is slidably mounted in the waist-shaped groove. The two sliding rods (13) alternately extend and retract under the linkage of the linkage rod (14).

5. A ventilation detection device for mines according to claim 4, characterized in that: The resistance adjustment assembly (11) includes a fixed slide (16) and a floating slide (17). The fixed slide (16) is fixed to the inner wall of the bottom shell (9). The fixed slide (16) is provided with an inner liner (21). The sliding rod (13) is engaged and slidably disposed between the inner liner (21) and the floating slide (17).

6. A ventilation detection device for mines according to claim 5, characterized in that: The fixed slide (16) is provided with a threaded hole (22). The resistance adjustment assembly (11) also includes an adjustment stud (18) and a resistance spring (19). The adjustment stud (18) and the threaded hole (22) are threadedly connected. The floating slide (17) is provided with a flange (23). The resistance spring (19) is located between the floating slide (17) and the flange (23).

7. A ventilation detection device for mines according to claim 6, characterized in that: It also includes a gas storage component (1), which includes a compressed gas tank (5), a solenoid valve (6) and a gas transmission pipeline (7). The solenoid valve (6) is located on the compressed gas tank (5), and an array of gas supply connectors (8) are provided on the solenoid valve (6). One end of the energy storage chamber (24) is provided with a connector (29), and the gas transmission pipeline (7) is located between the bottom outer shell (9) and the connector (29).

8. A ventilation detection device for mines according to claim 7, characterized in that: The gas sampling mechanism (4) also includes a central sleeve (31) and a sampling piston (32). A sampling nut (34) is provided at the center of the central sleeve (31). The sampling nut (34) and the central screw (25) are threadedly driven. The sampling pistons (32) are arranged in an array on the central sleeve (31). The outer ring of the sampling piston (32) is provided with a flexible sealing skirt (35) that slides in contact with the sampling sleeve (30). A connecting post (36) for connection is also provided between the sampling pistons (32).

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