A goaf spontaneous combustion prevention and control underground rock stratum condition monitoring device

Abstract

The application discloses a kind of goaf spontaneous combustion prevention and treatment underground rock formation condition monitoring devices, it is related to geological monitoring equipment technical field.The present application includes monitoring shell, and the gas sensor is installed in the bottom of monitoring shell;Sampling assembly is arranged in the inside of monitoring shell, and the sampling assembly includes fixed disc installed in the inside of monitoring shell, and sampling bag is arranged in the top of fixed disc.The present application is cooperated by being equipped with sampling assembly, adjusting assembly and negative pressure component, realizes the automatic, continuous and sealed sampling of different depth gas in goaf, gas sensor real-time monitoring environment gas, and stable negative pressure is formed under the action of counterweight and sealing plate in negative pressure component, and power is provided for gas extraction, adjusting assembly is controlled by cam to push block to control gas path on-off, replace traditional manual replacement gas bag operation, significantly reduce the risk of personnel exposed to harmful environment in underground, avoid gas leakage and sample pollution, improve the accuracy and reliability of monitoring data.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of geological monitoring equipment, in particular relates to a goaf spontaneous combustion prevention and control underground rock mass condition monitoring device. BACKGROUND

[0002] In the process of coal mining, with the advance of working face, the overburden rock collapse forms a goaf, and the broken coal (residual coal) left in the goaf is extremely easy to self-ignite under suitable conditions. The essence of residual coal spontaneous combustion is the slow oxidation reaction of coal body after contacting with oxygen, which is jointly affected by oxygen supply, environmental temperature and the characteristics of coal body itself. Underground rock mass condition monitoring is the core link of preventing and controlling goaf spontaneous combustion in coal mining, which can accurately grasp the oxidation environment of residual coal and the dynamic changes of rock mass by real-time collection of key parameters of coal seam and surrounding rock. The monitoring can capture the initial hidden signs of spontaneous combustion (such as abnormal increase of CO concentration and local temperature rise), reveal the oxygen penetration path and heat accumulation law, and provide scientific basis for judging the risk level of spontaneous combustion and optimizing ventilation and inerting measures. It is an important technical support to ensure mine safety and prevent fire and gas explosion accidents.

[0003] A gas detection and sampling device for a stoping goaf is disclosed in a Chinese patent application (or patent) with publication number CN120102224B, which includes a bottom plate, a receiving box fixedly arranged on the bottom plate, a collecting unit and a receiving unit. The collecting unit includes an adjusting box fixedly arranged on the receiving box, and a sliding groove is formed in the adjusting box. In the current gas detection operation in the coal mine goaf, the staff usually uses a gas sampling bag to collect the gas sample in the enclosed area. Since a single sampling bag can only reflect the instantaneous gas concentration at a local position, and the internal gas distribution in the goaf often has uneven phenomena such as stratification and vortex, in order to ensure the comprehensiveness and accuracy of the detection data.

[0004] However, the above-mentioned device still has the following problems in the implementation process: in the goaf gas monitoring, the gas conveying pipeline needs to be manually disconnected during sampling, and the full gas bag needs to be replaced, which is complicated and depends on on-site operation of personnel. The underground environment is complex and harsh, the space is narrow, the light is insufficient, high-concentration dust, humid water vapor and toxic and harmful gases often exist around the goaf, combined with the risk of rock collapse, personnel need to operate manually at close range, which not only has low efficiency, but also has safety hazards. In addition, frequent disconnection of the conveying pipe may cause gas leakage or pipe contamination, affecting the accuracy of subsequent monitoring data.

[0005] Therefore, we provide a goaf spontaneous combustion prevention and control underground rock mass condition monitoring device to solve the above-mentioned problems. SUMMARY

[0006] The purpose of the present application is to provide a goaf spontaneous combustion prevention and control underground rock stratum condition monitoring device, through the cooperation of the sampling assembly, the adjusting assembly and the negative pressure assembly, the problem that the gas sampling device in the prior art needs to manually disconnect the gas delivery when sampling the gas, and the gas bag after sampling needs to be replaced, and the replacement is very difficult when working underground in a complex environment is solved.

[0007] To solve the above technical problems, the present application is realized by the following technical solutions.

[0008] The present application is a kind of goaf spontaneous combustion prevention and control underground rock stratum condition monitoring device, including monitoring shell, the bottom of the monitoring shell is provided with gas sensor;The inside of the monitoring shell is provided with a sampling assembly, the sampling assembly includes a fixed disc installed in the inside of the monitoring shell, a sampling bag arranged on the top of the fixed disc, an air inlet pipe communicated with the bottom of the fixed disc, and the gas sample is sampled by the sampling assembly;The inside of the fixed disc is provided with an adjusting assembly, the adjusting assembly includes a rotating shaft movably connected to the inside of the fixed disc, a cam installed on the surface of the rotating shaft, a push block slidably connected to one side of the cam, and a through hole opened in the inside of the push block, and the opening and closing of the sampling bag are controlled by the adjusting assembly;The inside of the monitoring shell is provided with a negative pressure assembly, the negative pressure assembly includes a sealing plate slidably connected to the inside of the monitoring shell, a moving rod installed on the top of the sealing plate, and a counterweight installed on the bottom of the gas sensor, and the power for the air inlet of the sampling bag is provided by the negative pressure assembly.

[0009] The present application is further provided that the monitoring shell is provided with a sampling assembly on one side, the sampling assembly includes a support pipe installed on one side of the monitoring shell, a fixed shaft movably connected to the inside of the support pipe, and a helical blade installed on the surface of the fixed shaft, the helical blade is rotatably connected to the inside of the support pipe, and the soil sample in the goaf is collected by the sampling assembly.

[0010] The present application is further provided that the top of the support pipe is fixedly connected with an electric push rod, and the output end of the electric push rod is fixedly connected with a push plate.

[0011] The present application is further provided that the surface of the rotating shaft is fixedly connected with a first bevel gear, the top of the first bevel gear is engaged with a second bevel gear, and the other end of the fixed shaft penetrates into the inside of the monitoring shell and is fixedly connected with the second bevel gear.

[0012] The present application is further provided that the surface of the support pipe is threadedly connected with a storage shell, and the other end of the fixed shaft is fixedly connected with a drill bit.

[0013] The present application is further provided that the inside of the monitoring shell is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with the rotating shaft.

[0014] The monitoring shell top is provided with a support, one side of the support is fixedly connected with a servo motor, an output end of the servo motor is fixedly connected with a winding roller, the surface of the winding roller is fixedly connected with a traction rope, and the other end of the traction rope is fixedly connected with the moving rod.

[0015] The other end of the air inlet pipe penetrates to the outside of the monitoring shell, a sealing ring is slidably connected to the surface of the monitoring shell, and the top of the sealing ring is fixedly connected with the moving rod through a vertical rod.

[0016] The front side of the monitoring shell is movably connected with a sealing door through a hinge, and one side of the push block is fixedly connected with a first spring.

[0017] The top of the fixing disc is communicated with an exhaust pipe, the surface of the exhaust pipe is threadedly connected with a connecting pipe, the other end of the connecting pipe is communicated with a sampling bag, a sealing shell is slidably connected in the connecting pipe, an opening is formed in the sealing shell, and the surface of the sealing shell is sleeved with a second spring.

[0018] The present application has the following advantages.

[0019] 1. The present application is provided with a sampling assembly, an adjusting assembly and a negative pressure assembly, which realize automatic, continuous and sealed sampling of gas at different depths of the goaf, the gas sensor monitors the environmental gas in real time, the negative pressure assembly forms stable negative pressure under the action of the counterweight and the sealing plate to provide power for gas extraction, the adjusting assembly controls the on-off of the gas path by the cam pushing the push block, replaces the traditional manual replacement of the gas bag, significantly reduces the risk of underground personnel exposed to harmful environment, avoids gas leakage and sample pollution, and improves the accuracy and reliability of the monitoring data.

[0020] 2. The present application realizes synchronous collection and linkage control of gas and soil samples through the synergistic effect of the sampling assembly and the transmission structure, the driving motor transmits power to the fixed shaft through the bevel gear set, drives the spiral blade to drill soil and store it in the threaded storage shell, and the electric push rod and the push plate ensure stable contact of the equipment with the rock wall, the integrated design realizes multi-parameter supporting sampling, improves the comprehensive analysis ability of the goaf rock mass condition, and provides more comprehensive data support for spontaneous combustion early warning and prevention decision.

[0021] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows.

[0023] Figure 1It is a stereogram of a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0024] Figure 2 It is a sectional view of a monitoring shell in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0025] Figure 3 It is a sectional view of a fixing disc in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0026] Figure 4 It is a sectional view of a push block in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0027] Figure 5 It is a sectional view of a connecting pipe in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0028] Figure 6 It is a sectional view of a sealing shell in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0029] Figure 7 It is a schematic view of the connection of a first bevel gear and a second bevel gear in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0030] Figure 8 It is a sectional view of a supporting pipe in a kind of underground rock stratum condition monitoring device for goaf spontaneous combustion prevention and control.

[0031] In the drawing: 1, monitoring shell; 2, gas sensor; 3, sampling assembly; 301, fixing disc; 302, sampling bag; 303, air inlet pipe; 4, adjusting assembly; 401, rotating shaft; 402, cam; 403, push block; 404, through hole; 5, negative pressure assembly; 501, sealing plate; 502, moving rod; 503, counterweight; 6, sampling assembly; 601, supporting pipe; 602, fixing shaft; 603, helical blade; 7, electric push rod; 8, push plate; 9, first bevel gear; 10, second bevel gear; 11, storage shell; 12, drill bit; 13, driving motor; 14, support; 15, servo motor; 16, winding roller; 17, traction rope; 18, sealing ring; 19, sealing door; 20, first spring; 21, exhaust pipe; 22, connecting pipe; 23, sealing shell; 24, opening; 25, second spring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are only a part of the embodiments of the present application, not all.

[0033] Embodiment 1

[0034] Please refer to Figures 1-8The application discloses a kind of goaf spontaneous combustion prevention and treatment underground rock formation condition monitoring devices, including monitoring shell 1, gas sensor 2 is installed at the bottom of monitoring shell 1;Monitoring shell 1 inside is provided with sampling assembly 3, sampling assembly 3 includes fixed disc 301 installed in the inside of monitoring shell 1, sampling bag 302 is arranged at the top of fixed disc 301, gas inlet pipe 303 is communicated at the bottom of fixed disc 301, and gas sample is sampled by sampling assembly 3;Fixed disc 301 inside is provided with adjusting assembly 4, adjusting assembly 4 includes rotating shaft 401 movably connected in the inside of fixed disc 301, cam 402 is installed on the surface of rotating shaft 401, push block 403 is slidably connected on one side of cam 402, through hole 404 is opened in the inside of push block 403, and the opening and closing of sampling bag 302 is controlled by adjusting assembly 4;Monitoring shell 1 inside is provided with negative pressure assembly 5, and negative pressure assembly 5 includes sealing plate 501 slidably connected in the inside of monitoring shell 1, moving rod 502 is installed at the top of sealing plate 501, counterweight 503 is installed at the bottom of gas sensor 2, and the power for the air intake of sampling bag 302 is provided by negative pressure assembly 5.

[0035] Specifically: monitoring shell 1 bottom is provided with gas sensor 2, for real-time detection of the gas composition in goaf, especially for monitoring flammable and harmful gases such as carbon monoxide, so as to timely warn the risk of spontaneous combustion, and the gas sensor 2 is connected with the external control terminal through the wireless transmission module to complete the transmission of data, the sampling assembly 3 includes a fixed disc 301 installed in the inside of monitoring shell 1, the fixed disc 301 is provided with a sampling bag 302 at the top, and the fixed disc 301 is communicated with a gas inlet pipe 303 at the bottom, the gas sample at a specific position can be collected and saved by the sampling assembly 3, the adjusting assembly 4 includes a rotating shaft 401 movably connected in the inside of the fixed disc 301, the rotating shaft 401 is provided with a cam 402 on the surface, the cam 402 is slidably connected with a push block 403 on one side, and the push block 403 is provided with a through hole 404 in the inside, the adjusting assembly 4 can automatically control the opening and closing of the sampling bag 302, avoid the error and security risk caused by manual operation, improve the sampling efficiency and accuracy, the monitoring shell 1 is further provided with a negative pressure assembly 5, the negative pressure assembly 5 includes a sealing plate 501 slidably connected in the inside of the monitoring shell 1, the sealing plate 501 is provided with a moving rod 502 at the top, and the gas sensor 2 is provided with a counterweight 503 at the bottom, the negative pressure assembly 5 provides power for the gas sampling by generating negative pressure, ensures that the gas can smoothly enter the sampling bag 302, enhances the sampling reliability, and the monitoring shell 1 is provided with a sampling assembly 6 on one side, the sampling assembly 6 includes a support pipe 601 installed on one side of the monitoring shell 1, a fixed shaft 602 movably connected in the inside of the support pipe 601, and a spiral blade 603 installed on the surface of the fixed shaft 602.

[0036] Example 2

[0037] Please refer to Figures 1-8On the basis of embodiment 1, the side of the monitoring shell 1 is provided with a sampling assembly 6, the sampling assembly 6 comprises a supporting pipe 601 installed on the side of the monitoring shell 1, a fixed shaft 602 movably connected in the inside of the supporting pipe 601, a spiral blade 603 installed on the surface of the fixed shaft 602, the spiral blade 603 is rotationally connected in the inside of the supporting pipe 601, the soil sample in the goaf is collected through the sampling assembly 6, the top of the supporting pipe 601 is fixedly connected with an electric push rod 7, the output end of the electric push rod 7 is fixedly connected with a push plate 8, a first bevel gear 9 is fixedly connected on the surface of the rotating shaft 401, a second bevel gear 10 is engaged on the top of the first bevel gear 9, the other end of the fixed shaft 602 penetrates into the inside of the monitoring shell 1 and is fixedly connected with the second bevel gear 10, the surface of the supporting pipe 601 is threadedly connected with a storage shell 11, the other end of the fixed shaft 602 is fixedly connected with a drill bit 12, the inside of the monitoring shell 1 is fixedly connected with a driving motor 13, and the output end of the driving motor 13 is fixedly connected with the rotating shaft 401.

[0038] Specifically: the sampling assembly 6 can synchronously collect the soil sample and form matched data with the gas sample, more comprehensively reflect the rock stratum condition, the top of the supporting pipe 601 is fixedly connected with the electric push rod 7, the output end of the electric push rod 7 is fixedly connected with the push plate 8, the electric push rod 7 can push the monitoring shell 1 to stably contact with the inner wall of the hole, ensure that the equipment does not deviate during the sampling process, improve the sampling accuracy, the surface of the rotating shaft 401 is fixedly connected with the first bevel gear 9, the second bevel gear 10 is engaged on the top of the first bevel gear 9, the other end of the fixed shaft 602 penetrates into the inside of the monitoring shell 1 and is fixedly connected with the second bevel gear 10, the surface of the supporting pipe 601 is threadedly connected with the storage shell 11, the other end of the fixed shaft 602 is fixedly connected with the drill bit 12, the drill bit 12 can drill into the rock stratum, the spiral blade 603 pushes the soil sample into the storage shell 11, which is convenient for subsequent taking out and analysis, the inside of the monitoring shell 1 is fixedly connected with the driving motor 13, the output end of the driving motor 13 is fixedly connected with the rotating shaft 401, the driving motor 13 provides power for the whole sampling and sampling process, realizes automatic operation, reduces manual intervention, the top of the monitoring shell 1 is provided with a support 14, one side of the support 14 is fixedly connected with a servo motor 15, the output end of the servo motor 15 is fixedly connected with a winding roller 16, the surface of the winding roller 16 is fixedly connected with a traction rope 17, the other end of the traction rope 17 is fixedly connected with the moving rod 502, the lifting of the monitoring shell 1 is controlled through the servo motor 15, and continuous monitoring of different depth positions is realized.

[0039] Embodiment 3

[0040] Please refer to Figures 1-8On the basis of embodiment 1 and embodiment 2, the top of the monitoring shell 1 is provided with a support 14, one side of the support 14 is fixedly connected with a servo motor 15, the output end of the servo motor 15 is fixedly connected with a winding roller 16, the surface of the winding roller 16 is fixedly connected with a traction rope 17, the other end of the traction rope 17 is fixedly connected with the moving rod 502, the other end of the air inlet pipe 303 penetrates to the outside of the monitoring shell 1, the surface of the monitoring shell 1 is slidingly connected with a sealing ring 18, the top of the sealing ring 18 is fixedly connected with the moving rod 502 through a vertical rod, the front side of the monitoring shell 1 is hingedly connected with a sealing door 19, one side of the push block 403 is fixedly connected with a first spring 20, the top of the fixed disc 301 is communicated with an exhaust pipe 21, the surface of the exhaust pipe 21 is threadedly connected with a connecting pipe 22, the other end of the connecting pipe 22 is communicated with the sampling bag 302, the inside of the connecting pipe 22 is slidingly connected with a sealing shell 23, the inside of the sealing shell 23 is provided with an opening 24, and the surface of the sealing shell 23 is sleeved with a second spring 25.

[0041] Specifically: the other end of the air inlet pipe 303 penetrates to the outside of the monitoring shell 1, the surface of the monitoring shell 1 is slidingly connected with a sealing ring 18, the top of the sealing ring 18 is fixedly connected with the moving rod 502 through a vertical rod, the sealing ring 18 can move with the moving rod 502, so that the air inlet pipe 303 can be kept sealed in the non-sampling state and pollution is prevented, the front side of the monitoring shell 1 is hingedly connected with a sealing door 19, one side of the push block 403 is fixedly connected with a first spring 20, the sealing door 19 is convenient for maintaining and replacing internal components, and the first spring 20 ensures that the push block 403 can be reset in time, so that the sealing state of the sampling bag 302 is maintained, the top of the fixed disc 301 is communicated with an exhaust pipe 21, the surface of the exhaust pipe 21 is threadedly connected with a connecting pipe 22, the other end of the connecting pipe 22 is communicated with the sampling bag 302, the inside of the connecting pipe 22 is slidingly connected with a sealing shell 23, the inside of the sealing shell 23 is provided with an opening 24 for gas flow, and the surface of the sealing shell 23 is sleeved with a second spring 25, which further enhances the sealing performance of the sampling bag 302 and prevents gas leakage, and the sampling bag 302 is convenient to replace.

[0042] The working principle of the present application is as follows: the staff fixes the support 14 at the top of the goaf, then translates the monitoring shell 1 into the hole in the goaf, fixes the monitoring shell 1 by using the traction rope 17, then starts the servo motor 15, the servo motor 15 drives the winding roller 16 to rotate to release the traction rope 17, slowly sinks the monitoring shell 1 into the mine tunnel in the goaf, and the monitoring shell 1 drives the gas sensor 2 to move synchronously, so that the gas distribution in the underground rock stratum is detected by using the gas sensor 2.

[0043] The monitoring shell 1 is affected by the counterweight 503 while sinking, so that the moving rod 502 and the monitoring shell 1 move in opposite directions, the moving rod 502 moves while driving the sealing plate 501 to move, the sealing plate 501 moves while extracting the gas in the monitoring shell 1, so that the sealing plate 501 and the fixed disc 301 are in a negative pressure state.

[0044] After the monitoring shell 1 is controlled to sink to a specified distance by the servo motor 15, the electric push rod 7 on the left side of the monitoring shell 1 can be started first, the electric push rod 7 drives the push plate 8 to contact the inner wall of the hole, and the monitoring shell 1 is pushed to the right, so that the support pipe 601 on the right side of the monitoring shell 1 contacts the inner wall of the hole, then the driving motor 13 is started, the driving motor 13 drives the rotating shaft 401 to rotate, the rotating shaft 401 drives the cam 402 to rotate, the cam 402 drives the push block 403 to move, the push block 403 moves while driving the through hole 404 to move, the through hole 404 is used to connect the air inlet pipe 303 and the exhaust pipe 21, since the outside of the sampling bag 302 is in a negative pressure state, at this time, the external gas can be sucked into the sampling bag 302 through the air inlet pipe 303, precise sampling is realized, when the cam 402 continues to rotate, the first spring 20 can reset the push block 403, the push block 403 is used to seal the sampling bag 302, and fast sampling is realized.

[0045] The rotating shaft 401 also drives the first bevel gear 9 to rotate at the same time, the first bevel gear 9 cooperates with the second bevel gear 10 to drive the fixed shaft 602 and the spiral blade 603 to rotate, the spiral blade 603 rotates while drilling the soil on the inner wall of the hole, and the soil is discharged into the storage shell 11, corresponding to the gas sample taken out by the sampling bag 302, so that the experimenters can accurately monitor the condition of the underground rock stratum.

[0046] After the current position sampling is completed, the servo motor 15 can be controlled to drive the monitoring shell 1 to continue to sink, and the above operation is repeated, so that the gas samples and soil samples at different heights are collected, and the monitoring effect is improved.

[0047] The above only describes some exemplary embodiments of the present application in a descriptive manner, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present application. Therefore, the above figures and description are illustrative in nature, and should not be understood as limiting the scope of the claims of the present application.

Claims

1. A device for monitoring the conditions of underground rock strata in the area of a goaf for the purpose of preventing spontaneous combustion, comprising a monitoring casing (1), characterised in that: The bottom of the monitoring shell (1) is provided with a gas sensor (2); The inside of the monitoring shell (1) is provided with a sampling assembly (3), which comprises a fixed disc (301) installed in the inside of the monitoring shell (1), a sampling bag (302) arranged on the top of the fixed disc (301), and an air inlet pipe (303) communicated with the bottom of the fixed disc (301), so that the gas sample is sampled through the sampling assembly (3); The inside of the fixed disc (301) is provided with an adjusting assembly (4), which comprises a rotating shaft (401) movably connected to the inside of the fixed disc (301), a cam (402) installed on the surface of the rotating shaft (401), a push block (403) slidably connected to one side of the cam (402), and a through hole (404) formed in the inside of the push block (403), so that the opening and closing of the sampling bag (302) are controlled through the adjusting assembly (4); The inside of the monitoring shell (1) is provided with a negative pressure assembly (5), which comprises a sealing plate (501) slidably connected to the inside of the monitoring shell (1), a moving rod (502) installed on the top of the sealing plate (501), and a counterweight (503) installed on the bottom of the gas sensor (2), so that the air inlet of the sampling bag (302) is powered through the negative pressure assembly (5); One side of the monitoring shell (1) is provided with a sampling assembly (6), which comprises a support pipe (601) installed on one side of the monitoring shell (1), a fixed shaft (602) movably connected to the inside of the support pipe (601), and a spiral blade (603) installed on the surface of the fixed shaft (602), which is rotatably connected to the inside of the support pipe (601), so that the soil sample in the goaf is collected through the sampling assembly (6); The top of the support pipe (601) is fixedly connected with an electric push rod (7), and the output end of the electric push rod (7) is fixedly connected with a push plate (8); The surface of the rotating shaft (401) is fixedly connected with a first bevel gear (9), the top of the first bevel gear (9) is engaged with a second bevel gear (10), and one end of the fixed shaft (602) penetrates into the inside of the monitoring shell (1) and is fixedly connected with the second bevel gear (10); The surface of the support pipe (601) is threadedly connected with a storage shell (11), and the other end of the fixed shaft (602) is fixedly connected with a drill bit (12); The inside of the monitoring shell (1) is fixedly connected with a driving motor (13), and the output end of the driving motor (13) is fixedly connected with the rotating shaft (401); The top of the monitoring shell (1) is provided with a support (14), one side of the support (14) is fixedly connected with a servo motor (15), the output end of the servo motor (15) is fixedly connected with a winding roller (16), the surface of the winding roller (16) is fixedly connected with a traction rope (17), and the other end of the traction rope (17) is fixedly connected with the moving rod (502); The air inlet pipe (303) penetrates to the outside of the monitoring shell (1), a sealing ring (18) is slidably connected to the surface of the monitoring shell (1), and the top of the sealing ring (18) is fixedly connected with a moving rod (502) through a vertical rod; A sealing door (19) is hingedly connected to the front side of the monitoring shell (1), and a first spring (20) is fixedly connected to one side of the push block (403); A gas exhaust pipe (21) is communicated with the top of the fixed disc (301), a connecting pipe (22) is threadedly connected to the surface of the gas exhaust pipe (21), one end of the connecting pipe (22) is communicated with the sampling bag (302), a sealing shell (23) is slidably connected in the connecting pipe (22), an opening (24) is formed in the sealing shell (23), and a second spring (25) is sleeved on the surface of the sealing shell (23).

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