An experimental device for real-time infrared imaging of coal-methane adsorption-desorption

Abstract

The present invention discloses a real-time infrared imaging experimental device for coal and methane adsorption and desorption, which includes a high-pressure gas storage cylinder, an air flow guiding device, a vacuum pump, a pressure-resistant adsorption tank, an infrared thermal imager, a pressure gauge and a pressure regulating valve. One end of the air flow guiding device is connected to the high-pressure gas storage cylinder, and the other end of the air flow guiding device is connected to the pressure-resistant adsorption tank. The vacuum pump is arranged on one side of the air flow guiding device, and a connecting pipe is connected between the air flow guiding device and the vacuum pump. The infrared thermal imager is arranged on one side of the pressure-resistant adsorption tank. The present invention uses the setting method of cooperating the vacuum pump and the infrared thermal imager. First, the pressure-resistant adsorption tank is vacuum-treated, and then the pressure-resistant adsorption tank is communicated with the outside to carry out the coal desorption experiment, and the infrared thermal imager is used to record the whole experimental process in real time. The method of the present application can not only discriminate the coal adsorption characteristic area in real time, but also has high safety and stability.

Description

Technical Field

[0001] The present invention relates to the field of infrared imaging experimental devices, and particularly relates to a real-time infrared imaging experimental device for coal-methane adsorption-desorption. Background Technique

[0002] The ground extraction technology of coalbed methane refers to drilling and well layout on the ground, directly connecting the wellbore to the ore layer, and then extracting gas. The gas concentration obtained by this extraction technology reaches 90%, and the extraction technology is relatively less difficult.

[0003] The main influencing factors of the adsorption-desorption characteristics of coal bodies in-situ are temperature and pore pressure. Therefore, how to determine temperature and pressure is the key to the adsorption-desorption of coal bodies and also the direction to be broken through in the current technical field.

[0004] With the deepening of the coal seam mining depth, the surrounding rock stress shows an increasing trend along with it, and the difficulty of gas pre-extraction continues to increase. Clearly understanding the adsorption characteristics of methane by coal bodies under different conditions can effectively solve the problem of gas extraction. In the prior art, the entire experimental process is not recorded in real time by an infrared thermal imager, so the adsorption characteristic area of the coal body cannot be photographed and judged in real time, resulting in relatively low safety and stability of coal seam extraction. Therefore, it is necessary to design a real-time infrared imaging experimental device for coal-methane adsorption-desorption. Summary of the Invention

[0005] The purpose of the present invention is to provide a real-time infrared imaging experimental device for coal-methane adsorption-desorption to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A real-time infrared imaging experimental device for coal-methane adsorption-desorption, including a high-pressure gas storage cylinder, an air flow guiding device, a vacuum pump, a pressure-resistant adsorption tank, an infrared thermal imager, a pressure gauge, and a pressure regulating valve. One end of the air flow guiding device is connected to the high-pressure gas storage cylinder, and the other end of the air flow guiding device is connected to the pressure-resistant adsorption tank. The vacuum pump is arranged on one side of the air flow guiding device, and a connecting pipe is connected between the air flow guiding device and the vacuum pump. The infrared thermal imager is arranged on one side of the pressure-resistant adsorption tank, and the pressure gauge and the pressure regulating valve are installed on the air flow guiding device.

[0007] Preferably, a first gas monitor is arranged on the other side of the pressure-resistant adsorption tank, a second gas monitor is arranged on one side of the high-pressure gas storage cylinder, and a highly transparent infrared glass window is rotatably arranged on one side of the pressure-resistant adsorption tank, and the position of the highly transparent infrared glass window corresponds to that of the infrared thermal imager.

[0008] Preferably, the air flow guiding device includes a connecting cylinder, a connecting pipe, a moving mechanism, a blocking mechanism, an elastic clamping mechanism and a fixing plate. The connecting pipes are respectively connected to the top and bottom of the connecting cylinder. One end of one of the connecting pipes is connected to a high-pressure gas storage cylinder, and one end of the other connecting pipe is connected to a pressure-resistant adsorption tank. The moving mechanism is installed inside the connecting cylinder. The blocking mechanism is inserted through the moving mechanism and is used to block the fixing plate. The elastic clamping mechanism is installed on one side of the inner wall of the connecting cylinder, and the fixing plate is fixedly installed inside the connecting cylinder.

[0009] Preferably, the moving mechanism includes a lead screw, a guide rod, a moving push plate and a pressing plate. One end of the lead screw is rotatably inserted through one side of the connecting cylinder, and the other end of the lead screw is rotatably connected to a fixed bracket. The fixed bracket is fixedly installed on the inner wall of the communicating pipe. One end of the guide rod is connected to the inner wall of the connecting cylinder, and the other end of the guide rod is fixedly connected to the fixed bracket. The moving push plate is threadedly inserted through the lead screw, and the moving push plate is slidably inserted through the guide rod. The pressing plate is fixedly connected to the bottom end of the moving push plate, and one end of the pressing plate is in a tilted state.

[0010] Preferably, the blocking mechanism includes an insertion block and an elastic blocking component. The insertion block is slidably inserted through the lead screw and the guide rod, and the elastic blocking component is connected to the bottom end of the insertion block. The elastic blocking component cooperates with the inner cavity of the fixing plate.

[0011] Preferably, the elastic blocking component includes a housing, a blocking head and a first spring. The blocking head is slidably fitted with the inner cavity of the housing. A plurality of the first springs are arranged inside the housing. One end of the first spring is connected to the inner wall of the housing, and the other end of the first spring is connected to the blocking head.

[0012] Preferably, a limiting rod is sleeved inside the first spring. One end of the limiting rod is fixedly connected to the inner wall of the housing, and the other end of the limiting rod is slidably inserted through the blocking head. A plurality of balls are movably embedded in the bottom of the blocking head.

[0013] Preferably, a fixed frame is fixedly connected to one side of the housing, and a positioning hole is formed in the middle of the fixed frame.

[0014] Preferably, the elastic clamping mechanism includes a fixed seat, an insertion rod, a pressing block and a second spring. The fixed seat is fixedly connected to the inner wall of the connecting cylinder. The pressing block is fixedly connected to one end of the insertion rod. The insertion rod is slidably inserted through the bottom of the fixed seat, and the pressing block is slidably inserted through the top of the fixed seat. An inclined surface is formed on one side of the pressing block. The second spring is movably sleeved outside the insertion rod, and the insertion rod is inserted and clamped with the inner cavity of the fixed frame.

[0015] Preferably, elastic claws are symmetrically connected to one side of the movable push plate, clamping blocks are connected to both sides of the insertion block, the elastic claws are made of elastic materials, and the elastic claws cooperate with the clamping blocks.

[0016] Technical effects and advantages of the present invention:

[0017] With the present invention, by using the combination of a vacuum pump and an infrared thermal imager, first, vacuum treatment is performed on the pressure-resistant adsorption tank. Secondly, a coal body adsorption experiment is carried out using a high-pressure gas storage tank. Then, the pressure-resistant adsorption tank is connected to the outside for a coal body desorption experiment, and the infrared thermal imager is used to record the entire experimental process in real time. The method of this application can not only identify the coal body adsorption characteristic area in real time but also has high safety and stability. Description of the drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the front internal structure of the air flow guiding device of the present invention.

[0020] Figure 3 It is a schematic diagram of the internal top view structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the front structure at the plugging mechanism of the present invention.

[0022] Figure 5 It is a schematic diagram of the top view structure at the moving mechanism of the present invention.

[0023] Figure 6 It is a schematic diagram of the internal structure at the elastic plugging assembly of the present invention.

[0024] Figure 7 It is a schematic diagram of the internal structure at the elastic clamping mechanism of the present invention.

[0025] Figure 8 It is a schematic diagram of the top view structure at the elastic claw of the present invention.

[0026] In the figure: 1. High-pressure gas storage cylinder; 2. Airflow guiding device; 21. Connecting cylinder; 22. Connecting pipe; 23. Moving mechanism; 231. Lead screw; 232. Guide rod; 233. Moving push plate; 234. Pressing plate; 235. Elastic claw; 24. Sealing mechanism; 241. Insertion block; 242. Elastic sealing component; 2421. Housing; 2422. Sealing head; 2423. First spring; 2424. Fixed frame; 243. Clamping block; 25. Elastic clamping mechanism; 251. Fixed seat; 252. Insertion rod; 253. Extrusion block; 254. Second spring; 26. Fixed plate; 3. Vacuum pump; 4. Pressure-resistant adsorption tank; 41. High-transmittance infrared glass window; 5. Infrared thermal imager; 6. Pressure gauge; 7. Pressure regulating valve; 8. First gas monitor; 9. Second gas monitor. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] The present invention provides as Figure 1-8A real-time infrared imaging experimental device for coal and methane adsorption-desorption is shown, which includes a high-pressure gas storage cylinder 1, an air flow guiding device 2, a vacuum pump 3, a pressure-resistant adsorption tank 4, an infrared thermal imager 5, a pressure gauge 6 and a pressure regulating valve 7. One end of the air flow guiding device 2 is connected to the high-pressure gas storage cylinder 1, and the other end of the air flow guiding device 2 is connected to the pressure-resistant adsorption tank 4. The vacuum pump 3 is arranged on one side of the air flow guiding device 2. A communicating pipe is connected between the air flow guiding device 2 and the vacuum pump 3, and a vacuum gauge and a valve are installed on the communicating pipe. The infrared thermal imager 5 is arranged on one side of the pressure-resistant adsorption tank 4. Since this experiment is an adsorption / desorption experiment, the airtightness requirement of the experimental device is relatively high. The pressure-resistant adsorption tank 4 is in an extremely sealed state, and the emissivity of the metal material surface is relatively low. Therefore, the non-contact temperature measurement method of the infrared thermal imager 5 is adopted. Under the condition of meeting the airtightness requirement of the tank body for the experiment, real-time infrared imaging can also be carried out. The pressure gauge 6 and the pressure regulating valve 7 are installed on the air flow guiding device 2. A first gas monitor 8 is arranged on the other side of the pressure-resistant adsorption tank 4, and a second gas monitor 9 is arranged on one side of the high-pressure gas storage cylinder 1. A high-transmittance infrared glass window 41 is rotatably arranged on one side of the pressure-resistant adsorption tank 4, and the position of the high-transmittance infrared glass window 41 corresponds to that of the infrared thermal imager 5. By rotating and opening the high-transmittance infrared glass window 41, it is convenient to put the coal sample in for the pressure experiment of the coal sample. Through the infrared thermal imager 5, it is convenient to take pictures and record the coal sample inside the pressure-resistant adsorption tank 4 through the high-transmittance infrared glass window 41. Through the pressure gauge 6, it is convenient to measure the air pressure inside the air flow guiding device 2 and adjust the air pressure inside the cavity of the pressure-resistant adsorption tank 4, so as to detect the coal sample under different pressure states and make the experimental results more accurate.

[0029] Preferably, the air flow guiding device 2 includes a connecting cylinder 21, a connecting pipe 22, a moving mechanism 23, a plugging mechanism 24, an elastic clamping mechanism 25 and a fixing plate 26. The connecting pipes 22 are respectively connected to the top and bottom of the connecting cylinder 21. One end of one of the connecting pipes 22 is connected to the high-pressure gas storage cylinder 1, and one end of the other connecting pipe 22 is connected to the pressure-resistant adsorption tank 4. The moving mechanism 23 is installed inside the connecting cylinder 21. The plugging mechanism 24 is inserted into the moving mechanism 23. The plugging mechanism 24 is used to plug the fixing plate 26. The elastic clamping mechanism 25 is installed on one side of the inner wall of the connecting cylinder 21. The fixing plate 26 is fixedly installed inside the connecting cylinder 21. A square groove is opened in the middle of the fixing plate 26 to facilitate the connection of the inner cavities of the connecting cylinder 21 and the high-pressure gas storage cylinder 1. Through the connecting pipe 22, it is convenient to connect the inner cavities of the high-pressure gas storage cylinder 1, the vacuum pump 3 and the pressure-resistant adsorption tank 4. Through the moving mechanism 23, it is convenient to drive the position of the plugging mechanism 24 and press the elastic clamping mechanism 25 at the same time. Through the plugging mechanism 24, it is convenient to plug the inner cavity of the fixing plate 26, thus preventing the connection between the vacuum pump 3 and the high-pressure gas storage cylinder 1. Through the elastic clamping mechanism 25, it is convenient to insert and position the plugging mechanism 24.

[0030] Preferably, the moving mechanism 23 includes a lead screw 231, a guide rod 232, a moving push plate 233 and a pressing plate 234. One end of the lead screw 231 is rotationally inserted through one side of the connecting cylinder 21, and the other end of the lead screw 231 is rotatably connected to a fixed bracket. The fixed bracket is fixedly installed on the inner wall of the communicating pipe. One end of the guide rod 232 is connected to the inner wall of the connecting cylinder 21, and the other end of the guide rod 232 is fixedly connected to the fixed bracket. The moving push plate 233 is threadedly inserted through the lead screw 231, and the moving push plate 233 is slidably inserted through the guide rod 232. The pressing plate 234 is fixedly connected to the bottom end of the moving push plate 233, and one end of the pressing plate 234 is in a raised state. Through the threaded insertion between the lead screw 231 and the moving push plate 233, it is convenient to push the position of the moving push plate 233 by rotating the lead screw 231, so that the moving push plate 233 can push the insertion block 241, so that the insertion block 241 can drive the elastic sealing assembly 242 to move horizontally, so that the elastic sealing assembly 242 can be disengaged from the sealing of the fixing plate 26, so that the high-pressure gas cylinder 1 can communicate with the inner cavity of the connecting cylinder 21.

[0031] Preferably, the sealing mechanism 24 includes an insertion block 241 and an elastic sealing assembly 242. The insertion block 241 is slidably inserted through the lead screw 231 and the guide rod 232. The elastic sealing assembly 242 is connected to the bottom end of the insertion block 241. The elastic sealing assembly 242 cooperates with the inner cavity of the fixing plate 26. The elastic sealing assembly 242 includes a housing 2421, a sealing head 2422 and a first spring 2423. The sealing head 2422 is slidably fitted with the inner cavity of the housing 2421. A plurality of first springs 2423 are arranged inside the housing 2421. One end of the first spring 2423 is connected to the inner wall of the housing 2421, and the other end of the first spring 2423 is connected to the sealing head 2422. A limiting rod is sleeved inside the first spring 2423. One end of the limiting rod is fixedly connected to the inner wall of the housing 2421, and the other end of the limiting rod is slidably inserted through the sealing head 2422. A plurality of balls are movably embedded in the bottom of the sealing head 2422. One side of the housing 2421 is fixedly connected to a fixing frame 2424, and a positioning hole is opened in the middle of the fixing frame 2424. It is convenient to drive the sealing head 2422 through the housing 2421, and it is convenient to seal the inner cavity of the fixing plate 26 through the sealing head 2422, so as to seal the inner cavity of the high-pressure gas cylinder 1. Through the compression deformation of the first spring 2423, it is convenient to elastically support the sealing head 2422, so that the sealing head 2422 can seal the inner cavity of the fixing plate 26. Through the rolling of the balls, the horizontal movement of the sealing head 2422 is smoother, so that the sealing head 2422 can flexibly select to seal or communicate with the high-pressure gas cylinder 1.

[0032] Preferably, the elastic clamping mechanism 25 includes a fixed seat 251, an insertion rod 252, a pressing block 253 and a second spring 254. The fixed seat 251 is fixedly connected to the inner wall of the connecting cylinder 21. The pressing block 253 is fixedly connected to one end of the insertion rod 252. The insertion rod 252 is slidably inserted through the bottom of the fixed seat 251, and the pressing block 253 is slidably inserted through the top of the fixed seat 251. A slope is provided on one side of the pressing block 253. The second spring 254 is movably sleeved outside the insertion rod 252. The insertion rod 252 is inserted and clamped with the inner cavity of the fixed bracket 2424. The insertion rod 252 facilitates the insertion and positioning of the fixed bracket 2424, making the position of the elastic sealing assembly 242 more stable, and thus making the sealing of the inner cavity of the fixing plate 26 by the elastic sealing assembly 242 more stable.

[0033] Preferably, elastic claws 235 are symmetrically connected to one side of the moving push plate 233. Clamping blocks 243 are connected to both sides of the insertion block 241. The elastic claws 235 are made of an elastic material and cooperate with the clamping blocks 243. By rotating the lead screw 231 forward, it is convenient to drive the moving push plate 233 to move horizontally in the direction of the insertion block 241, so as to horizontally push the insertion block 241 until the insertion block 241 fits with the fixed bracket. At this time, under the extrusion of the clamping block 243, after the elastic claws 235 deform inward and recover, they hook the clamping block 243. Then, the lead screw 231 is rotated in the reverse direction, so that the moving push plate 233 moves in the direction of the elastic clamping mechanism 25. Through the hooking of the elastic claws 235 to the clamping blocks 243, the horizontal movement of the moving push plate 233 can synchronously drive the horizontal movement of the insertion block 241, so that the sealing head 2422 can move to the state of sealing the inner cavity of the fixing plate 26. At this time, through the limitation of the housing 2421 by the fixed seat 251, the continuous movement of the elastic sealing assembly 242 is blocked. By continuing to rotate the lead screw 231, at this time, the clamping block 243 stops moving forward, and the elastic claws 235 bend outward and then recover, so that the elastic claws 235 no longer hook the clamping block 243. The moving push plate 233 continues to drive the pressing plate 234 to move, so that the pressing plate 234 presses the pressing block 253. Through the slope of the pressing block 253, it is convenient to adjust the direction of the force, so that the horizontal movement of the pressing plate 234 presses the pressing block 253, so that the pressing block 253 can move vertically, squeeze and deform the second spring 254, and at the same time make the insertion rod 252 move downward and penetrate the fixed bracket 2424, so as to facilitate the positioning of the position of the housing 2421 and make the sealing of the high-pressure gas cylinder 1 more stable.

[0034] Working principle of the present invention: First, horizontally arrange the pressure-resistant adsorption tank 4, install the infrared thermal imager 5, then horizontally place the coal sample slice into the pressure-resistant adsorption tank 4, adjust the position, and on the premise of ensuring good sealing, make the observation surface of the coal sample closely adhere to the high-transmission infrared glass window 41, ensure that the infrared thermal imager 5 and the high-transmission infrared glass window 41 are on the same horizontal line, and connect the vacuum pump 3 and the high-pressure gas storage cylinder 1 through the gas flow guiding device 2; Open the pressure regulating valve 7, and it is convenient to block the inner cavity of the high-pressure gas storage cylinder 1 through the gas flow guiding device 2. Use the vacuum pump 3 to conduct vacuum degassing treatment on the pressure-resistant adsorption tank 4 and the gas flow guiding device 2, so that the reading of the pressure gauge 6 reaches below -0.094 MPa and remains for more than half an hour; Take two pictures of the coal sample slice before adsorption to obtain the reference infrared image of the coal sample before adsorption; Turn it 180° upward, connect the high-pressure gas storage cylinder 1, and adjust the pressure regulating valve 7 to the constant adsorption pressure preset in the experimental scheme. Use the infrared thermal imager 5 to take pictures of the coal sample at a rate of 2 s / time, and save the infrared image and the adsorption time in real time; After the adsorption is completed, close the pressure regulating valve 7, open the high-transmission infrared glass window 41 on the pressure-resistant adsorption tank 4, conduct natural desorption of the coal sample, take pictures with the infrared thermal imager at a rate of 2 s / time, and save the infrared image and the desorption time in real time. At the same time, always pay attention to the first gas monitor 8 and the second gas monitor 9 to ensure the overall safety of the experiment.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coal and methane adsorption-desorption real-time infrared imaging experimental device, comprising a high-pressure gas storage bottle (1), an airflow guiding device (2), a vacuum pump (3), a pressure-resistant adsorption tank (4), an infrared thermal imager (5), a pressure gauge (6) and a pressure regulating valve (7), It is characterized in that One end of the airflow guiding device (2) is connected to the high-pressure gas storage bottle (1), the other end of the airflow guiding device (2) is connected to the pressure-resistant adsorption tank (4), the vacuum pump (3) is arranged on one side of the airflow guiding device (2), a connecting pipe is connected between the airflow guiding device (2) and the vacuum pump (3), the infrared thermal imager (5) is arranged on one side of the pressure-resistant adsorption tank (4), and the pressure gauge (6) and the pressure regulating valve (7) are installed on the airflow guiding device (2); The airflow guiding device (2) comprises a connecting tube (21), a connecting pipe (22), a moving mechanism (23), a blocking mechanism (24), an elastic clamping mechanism (25) and a fixing plate (26), wherein the moving mechanism (23) is installed inside the connecting tube (21); The moving mechanism (23) comprises a screw rod (231), a guide rod (232), a moving push plate (233) and a pressure plate (234); the moving push plate (233) is threadedly connected to the screw rod (231); the moving push plate (233) is slidably connected to the guide rod (232); the pressure plate (234) is fixedly connected to the bottom end of the moving push plate (233); and one end of the pressure plate (234) is in a tilted state.

2. A coal and methane adsorption-desorption real-time infrared imaging experimental device according to claim 1, It is characterized in that A first gas monitor (8) is arranged on the other side of the pressure-resistant adsorption tank (4), a second gas monitor (9) is arranged on one side of the high-pressure gas storage bottle (1), and a high-infrared-transmittance glass window (41) is rotatably arranged on one side of the pressure-resistant adsorption tank (4), and the high-infrared-transmittance glass window (41) corresponds to the position of the infrared thermal imager (5).

3. A coal and methane adsorption-desorption real-time infrared imaging experimental device according to claim 1, It is characterized in that The connecting tubes (22) are respectively connected to the top and bottom of the connecting tube (21), one end of one of the connecting tubes (22) is connected to the high-pressure gas cylinder (1), and one end of the other connecting tube (22) is connected to the pressure-resistant adsorption tank (4). The blocking mechanism (24) is connected to the moving mechanism (23) through insertion, and the blocking mechanism (24) is used to block the fixed plate (26). The elastic clamping mechanism (25) is installed on one side of the inner wall of the connecting tube (21), and the fixed plate (26) is fixedly installed inside the connecting tube (21).

4. A coal and methane adsorption-desorption real-time infrared imaging experimental device according to claim 1, It is characterized in that One end of the lead screw (231) is rotatably inserted and connected to one side of the connecting cylinder (21), the other end of the lead screw (231) is rotatably connected to a fixed bracket, the fixed bracket is fixedly installed on the inner wall of the communicating pipe, one end of the guide rod (232) is connected to the inner wall of the connecting cylinder (21), and the other end of the guide rod (232) is fixedly connected to the fixed bracket.

5. The real-time infrared imaging experimental device for coal and methane adsorption - desorption according to claim 1, characterized in that the plugging mechanism (24) includes an insertion block (241) and an elastic plugging assembly (242), the insertion block (241) is slidably inserted and connected to the lead screw (231) and the guide rod (232), the elastic plugging assembly (242) is connected to the bottom end of the insertion block (241), and the elastic plugging assembly (242) cooperates with the inner cavity of the fixing plate (26).

6. The real-time infrared imaging experimental device for coal and methane adsorption - desorption according to claim 5, characterized in that the elastic plugging assembly (242) includes a housing (2421), a plugging head (2422) and a first spring (2423), the plugging head (2422) is slidably fitted with the inner cavity of the housing (2421), a plurality of the first springs (2423) are arranged inside the housing (2421), one end of the first spring (2423) is connected to the inner wall of the housing (2421), and the other end of the first spring (2423) is connected to the plugging head (2422).

7. The real-time infrared imaging experimental device for coal and methane adsorption - desorption according to claim 6, characterized in that a limiting rod is sleeved inside the first spring (2423), one end of the limiting rod is fixedly connected to the inner wall of the housing (2421), the other end of the limiting rod is slidably inserted and connected to the plugging head (2422), and a plurality of balls are movably embedded at the bottom of the plugging head (2422).

8. The real-time infrared imaging experimental device for coal and methane adsorption - desorption according to claim 6, characterized in that one side of the housing (2421) is fixedly connected to a fixing frame (2424), and a positioning hole is formed in the middle of the fixing frame (2424).

9. The real-time infrared imaging experimental device for coal and methane adsorption - desorption according to claim 1, characterized in that the elastic clamping mechanism (25) includes a fixed seat (251), an insertion rod (252), a pressing block (253) and a second spring (254), the fixed seat (251) is fixedly connected to the inner wall of the connecting cylinder (21), the pressing block (253) is fixedly connected to one end of the insertion rod (252), the insertion rod (252) is slidably inserted and connected to the bottom of the fixed seat (251), the pressing block (253) is slidably inserted and connected to the top of the fixed seat (251), a slope is formed on one side of the pressing block (253), the second spring (254) is movably sleeved outside the insertion rod (252), and the insertion rod (252) is inserted and clamped with the inner cavity of the fixing frame (2424).

10. A real-time infrared imaging experimental device for coal and methane adsorption-desorption, according to claim 5, characterized in that, elastic claws (235) are symmetrically connected to one side of the movable push plate (233), clamping blocks (243) are connected to both side edges of the insertion block (241), the elastic claws (235) are made of an elastic material, and the elastic claws (235) cooperate with the clamping blocks (243).

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