Methane gas concentration monitoring system

Abstract

The invention particularly discloses a methane gas concentration monitoring system which comprises a base, a guide column is fixedly arranged at the top of the base, a supporting plate is fixedly arranged at the other end of the guide column, a sliding table is arranged on the guide column in a sliding mode, and a first driving assembly for driving the sliding table to move is arranged on the supporting plate; a monitoring box is arranged on the sliding table, a methane monitor and a second motor are fixedly arranged in the monitoring box, a baffle is fixedly arranged on an output shaft of the second motor, a gas guide hole is formed in the baffle, a piston plate is slidably arranged in the monitoring box, and a second driving assembly for driving the piston plate to move is arranged on the monitoring box; a water storage cavity is formed between the piston plate and the baffle, a first channel and a second channel which are communicated with the cavity are formed in the monitoring box, a first one-way valve is arranged in the first channel, a filter screen is fixedly arranged at an inlet of the first channel, and a second one-way valve is arranged in the second channel. Weeds or impurities are prevented from entering the cavity, and aquatic plants are prevented from being wound on the stirring head, so that the motor is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of methane detection, and in particular to a methane gas concentration monitoring system. Background Art

[0002] Methane is a major component of conventional natural gas, shale gas, and combustible ice, and is a very important carbon-based resource. Moreover, methane is a greenhouse gas, and its impact on the global climate cannot be ignored. The greenhouse effect of methane is dozens of times that of carbon dioxide. The decomposition of organic matter and algae activity in ponds will produce methane, which may then be released into the atmosphere through the pond surface. Therefore, understanding the production and emission of methane in ponds is crucial to assessing its impact on the global climate.

[0003] A Chinese patent document with publication number CN116482309A discloses a monitoring device for methane gas in thermally thawed lakes and ponds in frozen soil areas, including: a top plate, an adjustment mechanism and a monitoring mechanism, the monitoring mechanism including a second transverse electric push rod, a slide seat, a second vertical electric push rod, a mounting tube and a sealing bottom plate, a motor box, a first electric telescopic rod, a turntable, a second electric telescopic rod and a methane detection sensor are arranged inside the mounting tube, the motor box is fixed on the top of the mounting tube, a motor is arranged in the motor box, the output shaft of the motor is connected to the first electric telescopic rod, the first electric The action end of the movable telescopic rod is connected to a turntable, which is slidably installed in the mounting tube. The first electric telescopic rod can drive the turntable to slide up and down along the mounting tube. The second electric telescopic rod is connected to the bottom of the turntable, and the action end of the second electric telescopic rod is connected to the sealing bottom plate. The monitoring mechanism is also provided with a debris removal mechanism, which includes a rotating ring, which is rotatably mounted on the mounting tube, and a clamping ring is provided on the upper and lower sides of the rotating ring. The rotating ring is connected to the sealing bottom plate through a telescopic connecting plate, and a cleaning plate is connected to the rotating ring, and a cutting blade is provided on the outer wall of the cleaning plate. By controlling the monitoring mechanism, the external debris removal mechanism can be driven to rotate to perform external debris removal work.

[0004] The disadvantage of the above disclosed solution is that after the weeds on the outside of the installation cylinder are cut, the cut weeds or impurities are easily introduced into the installation cylinder with the water flow, causing the weeds or impurities to be easily entangled on the stirring head and hinder the rotation of the stirring head, thereby easily damaging the motor. Summary of the invention

[0005] The present invention provides a methane gas concentration monitoring system, which can effectively solve the problems in the background technology.

[0006] The present invention discloses a methane gas concentration monitoring system, comprising a base, a guide column is fixedly arranged on the top of the base, a support plate is fixedly arranged on the other end of the guide column, a sliding platform is slidably arranged on the guide column, and a first driving component that drives the sliding platform to move is arranged on the support plate; a monitoring box is arranged on the sliding platform, a methane monitor and a second motor are fixedly arranged on the top wall of the monitoring box, a baffle is fixedly arranged on the output shaft of the second motor, the baffle is rotatably connected to the monitoring box, a stirring rod is arranged on the baffle, an air guide hole is opened on the baffle, a piston plate is slidably arranged in the monitoring box, a second driving component that drives the piston plate to move is arranged on the monitoring box, a water storage chamber is formed between the piston plate and the baffle, a first channel and a second channel that are connected to the chamber are opened on the monitoring box, a first one-way valve is arranged in the first channel, a filter is fixedly arranged at the inlet of the first channel, a second one-way valve is arranged in the second channel, and a weed removal component for cleaning weeds is arranged on the monitoring box.

[0007] Furthermore, the impurity removal component includes a transmission component and a second connecting rod, the second connecting rod is slidably connected to the monitoring box, a limiting groove is provided on the monitoring box along its circumference, a third slider is slidably arranged in the limiting groove, the third slider is fixedly connected to the second connecting rod, the second connecting rod is in an "L" shape, a plurality of second protrusions are fixedly arranged on the inner side of the second connecting rod, the plurality of second protrusions are arranged at intervals, a plurality of first protrusions are fixedly arranged on the outer side of the monitoring box, the plurality of first protrusions are arranged at intervals, and the first protrusions and the second protrusions are staggered; the transmission component is connected to the piston plate, and the piston plate drives the second connecting rod to rotate through the transmission component.

[0008] Furthermore, the transmission assembly includes a screw, which is fixedly arranged at the bottom of the piston plate. A nut is arranged on the screw, and the nut is fixedly connected to the second connecting rod. A steel ball is used as a rolling body between the nut and the screw, so that the screw, nut and steel ball form a ball screw pair.

[0009] Furthermore, the third sliding block is in the shape of an isosceles trapezoid, and the third sliding block cleans the impurities in the limiting groove when sliding along the limiting groove.

[0010] Furthermore, the first driving assembly includes a first motor, which is fixedly arranged on the top of the support plate. A threaded rod is fixedly arranged on the output shaft of the first motor. The threaded rod passes through the sliding table and is threadedly connected to the sliding table. The other end of the threaded rod is rotatably connected to the base.

[0011] Furthermore, a block is fixedly provided on the inner wall of the chamber, and the block blocks the air guide hole to prevent liquid from entering the air guide hole during drainage.

[0012] Furthermore, the second driving assembly includes a third electric push rod, which is fixedly arranged in the box wall of the monitoring box, and the output end of the third electric push rod is fixedly connected to the piston plate.

[0013] Furthermore, a second electric push rod is fixedly arranged on the sliding table, a second slider is fixedly arranged on the output end of the second electric push rod, the second slider is slidably connected to the sliding table, and the bottom of the second slider is connected to the monitoring box.

[0014] Furthermore, a first electric push rod is fixedly provided at the bottom of the second sliding block, and an output end of the first electric push rod is fixedly connected to the monitoring box.

[0015] Furthermore, a first slider is slidably provided on the support plate, the first slider is abutted against the second slider, a connecting plate is fixedly provided on the top of the first slider, a first spring is fixedly provided between the connecting plate and the support plate, two connecting rods are hingedly provided on one side of the first slider, a first connecting rod is hingedly provided on the other end of the connecting rod, a fixed block is symmetrically fixedly provided on the support plate, a first sliding groove is provided on the fixed block, the first connecting rod passes through the corresponding first sliding groove and is slidably connected to the first sliding groove, a protective cover is fixedly provided on the first connecting rod, and the protective cover protects the monitoring box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Since a water storage chamber is formed between the piston plate and the baffle, the monitoring box is provided with a first channel and a second channel connected to the chamber, a first one-way valve is provided in the first channel, a filter is fixedly provided at the inlet of the first channel, and a second one-way valve is provided in the second channel. Therefore, when the monitoring box enters the water and monitors the methane in the water, the third electric push rod is started, and the third electric push rod drives the piston plate to move downward, and the downward movement of the piston plate generates negative pressure inside the chamber, so that the external liquid enters the chamber through the filter and the first channel, and prevents weeds or impurities from entering the chamber, preventing water weeds from entangled on the stirring head and hindering the stirring head from rotating, thereby preventing the motor from being damaged and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0019] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the present invention.

[0020] Figure 3 It is a three-dimensional schematic diagram from another viewing angle of the present invention.

[0021] Figure 4 It is a schematic diagram of the two protective covers of the present invention in a separated state.

[0022] Figure 5 It is a cross-sectional schematic diagram of the two protective covers of the present invention in a separated state.

[0023] Figure 6 It is a three-dimensional schematic diagram of the monitoring box of the present invention.

[0024] Figure 7 It is a cross-sectional schematic diagram of the monitoring box of the present invention.

[0025] Figure 8 It is an enlarged schematic diagram of point A of the present invention.

[0026] Fig. 9 It is an enlarged schematic diagram of point B of the present invention.

[0027] Fig.10 It is a cross-sectional schematic diagram of the monitoring box of the present invention from different viewing angles.

[0028] Fig.11 It is a three-dimensional schematic diagram of the piston plate of the present invention.

[0029] Fig.12 It is a three-dimensional schematic diagram of the second connecting rod and the second protrusion of the present invention.

[0030] In the figure: 1. base; 2. threaded rod; 3. guide column; 4. sliding table; 5. support plate; 6. first motor; 7. first slider; 8. first spring; 9. connecting rod; 10. first slide groove; 11. first connecting rod; 12. protective cover; 13. first electric push rod; 14. second connecting rod; 15. filter; 16. monitoring box; 17. first protrusion; 18. limit groove; 19. second electric push rod; 20. second slider; 21. third slider; 22. second protrusion; 23. second motor; 24. stirring rod; 25. second spring; 26. baffle; 27. guide groove; 28. piston plate; 29. ​​screw; 30. methane monitor; 31. nut; 32. first one-way valve; 33. first channel; 34. air guide hole; 35. chamber; 36. block; 37. second channel; 38. second one-way valve; 39. third electric push rod. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 12As shown, a methane gas concentration monitoring system of the present invention includes a base 1, a guide column 3 is vertically fixedly arranged on the top of the base 1, and a support plate 5 is fixedly arranged on the other end of the guide column 3. A sliding table 4 is slidably arranged on the guide column 3, and a first driving component that drives the sliding table 4 to move vertically is arranged on the support plate 5. The first driving component includes a first motor 6, and the first motor 6 is fixedly arranged on the top of the support plate 5. The output shaft of the first motor 6 passes through the support plate 5 downward and is fixedly provided with a threaded rod 2, the threaded rod 2 passes through the sliding table 4 and is threadedly connected to the sliding table 4, and the other end of the threaded rod 2 is rotatably connected to the base 1.

[0033] A through slot is provided on the sliding table 4 along its length direction, in which a second electric push rod 19 is fixedly arranged horizontally, and a second slider 20 is fixedly arranged at the output end of the second electric push rod 19, and the second slider 20 is slidably connected with the through slot. A first electric push rod 13 is fixedly arranged vertically at the bottom of the second slider 20, and a monitoring box 16 is fixedly arranged at the output end of the first electric push rod 13. The horizontal range of movement of the monitoring box 16 can be adjusted by the second electric push rod 19, and the vertical range of movement of the monitoring box 16 can be adjusted by the first electric push rod 13.

[0034] The monitoring box 16 is a cylindrical structure that is hollow inside and open at the bottom. A methane monitor 30 and a second motor 23 are fixedly installed on the top wall of the monitoring box 16. The second motor 23 is located at the center of the top wall of the monitoring box 16. A baffle 26 is fixedly installed on the output shaft of the second motor 23. The baffle 26 is rotatably connected to the monitoring box 16, and an air guide hole 34 is opened on the baffle 26.

[0035] A piston plate 28 is slidably arranged in the monitoring box 16, and a guide groove 27 is symmetrically provided on the inner wall of the monitoring box 16. Both sides of the piston plate 28 are slidably connected to the guide groove 27. A second driving assembly is arranged on the monitoring box 16 to drive the piston plate 28 to move. The second driving assembly includes two third electric push rods 39. The two third electric push rods 39 are fixedly arranged in the box wall of the monitoring box 16, and the two third electric push rods 39 are symmetrically arranged. The output ends of the two third electric push rods 39 are fixedly connected to the piston plate 28.

[0036] A water storage chamber 35 is formed between the piston plate 28 and the baffle plate 26. A first channel 33 and a second channel 37 communicating with the chamber 35 are provided on the monitoring box 16, and the first channel 33 and the second channel 37 are both located above the chamber 35. A first one-way valve 32 is provided in the first channel 33, and liquid can flow into the chamber 35 through the first one-way valve 32. A filter screen 15 is fixedly provided at the inlet of the first channel 33 to prevent impurities from entering the chamber 35 through the first channel 33. A second one-way valve 38 is provided in the second channel 37, and the liquid in the chamber 35 is discharged through the second one-way valve 38.

[0037] A stirring rod 24 is symmetrically slidably arranged on the baffle 26, and the stirring rod 24 vertically passes through the baffle 26 and extends into the chamber 35. A circular plate is fixedly arranged on the top of the stirring rod 24, and a second spring 25 is sleeved on the outer periphery of the stirring rod 24. The two ends of the second spring 25 are fixedly connected to the circular plate and the baffle 26 respectively.

[0038] The monitoring box 16 is provided with a weed-removing assembly for cleaning weeds. The weed-removing assembly includes a transmission assembly and a second connecting rod 14. The second connecting rod 14 is in an "L" shape and is slidably connected to the monitoring box 16. A limiting groove 18 is provided on the top of the monitoring box 16 along its circumference. A third slider 21 is slidably provided in the limiting groove 18. The third slider 21 is fixedly connected to the second connecting rod 14 through the connecting rod. Fig.12 As shown, the third slider 21 is in the shape of an isosceles trapezoid. When the third slider 21 slides along the limiting groove 18 , it cleans the impurities in the limiting groove 18 , thereby reducing the resistance when the third slider 21 slides along the limiting groove 18 .

[0039] like Figure 6 As shown, a plurality of second protrusions 22 are fixedly provided on the inner side of the vertical portion of the second connecting rod 14, and the plurality of second protrusions 22 are arranged at intervals. A plurality of first protrusions 17 are fixedly provided on the outer side of the monitoring box 16, and the plurality of first protrusions 17 are arranged at intervals, and the first protrusions 17 and the second protrusions 22 are arranged alternately. The size of the first protrusion 17 is adapted to the distance between two adjacent second protrusions 22, so that when the second protrusion 22 rotates, it cooperates with the first protrusion 17 to squeeze and break the waterweed, thereby preventing the waterweed from being entangled around the outer periphery of the monitoring box 16, thereby affecting the amount of liquid entering the monitoring box 16.

[0040] In other embodiments, the first protrusion 17 is a blade, and when the second protrusion 22 rotates and drives the waterweed to pass through the blade, the blade can cut the waterweed.

[0041] The transmission assembly is connected to the piston plate 28, and the piston plate 28 drives the second connecting rod 14 to rotate through the transmission assembly. The transmission assembly includes a lead screw 29, which is fixedly arranged at the bottom of the piston plate 28. A nut 31 is sleeved on the lead screw 29, and the nut 31 is fixedly connected to the transverse part of the second connecting rod 14. A steel ball is used as a rolling body between the nut 31 and the lead screw 29, so that the lead screw 29, the nut 31 and the steel ball form a ball screw pair.

[0042] A first slider 7 is slidably provided on the side of the support plate 5 away from the first motor 6. The first slider 7 vertically passes through the support plate 5 and abuts against the second slider 20. A connecting plate is fixedly provided on the top of the first slider 7, and a first spring 8 is fixedly provided between the connecting plate and the support plate 5. Two connecting rods 9 are hingedly provided on one side of the first slider 7, and the two connecting rods 9 are in an inverted "V" shape. A first connecting rod 11 is hingedly provided on the other end of the connecting rod 9. Fixed blocks are symmetrically fixed on the support plate 5, and a first slide groove 10 is provided on the fixed block. The first connecting rod 11 passes downward through the corresponding first slide groove 10 and is slidably connected to the first slide groove 10. A protective cover 12 is fixedly provided on the first connecting rod 11, and the protective cover 12 protects the monitoring box 16. An arc-shaped groove for avoiding the first electric push rod 13 is provided on the top of the protective cover 12.

[0043] A stopper 36 is fixedly provided on the inner wall of the chamber 35. When draining liquid, the air guide hole 34 is rotated to be just above the stopper 36, so that the stopper 36 blocks the air guide hole 34 to prevent liquid from entering the air guide hole 34 during draining.

[0044] The working principle of a methane gas concentration monitoring system provided by the present invention is as follows:

[0045] The initial state of the device can be as follows Figure 1 , Figure 3 As shown, the monitoring box 16 is covered by two protective covers 12, which can prevent dust from falling on the monitoring box 16 or damage caused by accidental collision, thereby improving the protection of the monitoring box 16. The second slider 20 presses the first slider 7 upward, and the first spring 8 is in a stretched state.

[0046] When in use, since the protective cover 12 covers the monitoring box 16, there is a certain gap between the bottom of the monitoring box 16 and the bottom of the monitoring box 16. The first motor 6 is started, the first motor 6 drives the threaded rod 2 to rotate, and the rotation of the threaded rod 2 drives the sliding table 4 to move downward, and the sliding table 4 moves downward so that the second slider 20 no longer presses the first slider 7 upward, and the first slider 7 moves downward under the elastic reset force of the first spring 8. The first slider 7 moves downward and drives the two first connecting rods 11 to move back to each other through the two connecting rods 9, so that the two protective covers 12 move back to each other and open quickly, and will not hinder the monitoring box 16 from continuing to move downward.

[0047] When the sliding platform 4 drives the monitoring box 16 to fall into the water, the depth of the monitoring box 16 entering the water can be adjusted by the first electric push rod 13, so as to facilitate the detection of methane content in water at different depths.

[0048] When the monitoring box 16 enters the water and monitors the methane in the water, the piston plate 28 is close to the bottom of the baffle 26 in the initial state. Then the third electric push rod 39 is started, and the third electric push rod 39 drives the piston plate 28 to move downward. The downward movement of the piston plate 28 generates negative pressure inside the chamber 35, so that the external liquid enters the chamber 35 through the filter screen 15 and the first channel 33.

[0049] At the same time, when the piston plate 28 moves downward, it drives the screw 29 to move downward, and the screw 29 moves downward to drive the nut 31 to rotate, and the nut 31 drives the second connecting rod 14 to rotate. The rotation of the second connecting rod 14 drives the second protrusion 22 to rotate around the axis of the monitoring box 16. Therefore, during the rotation of multiple second protrusions 22, multiple first protrusions 17 respectively pass through the gaps between the corresponding two adjacent second protrusions 22. Therefore, when the second connecting rod 14 and the second protrusion 22 drive the aquatic plants to pass through the first protrusion 17, the first protrusion 17 cooperates with the second protrusion 22 to squeeze and break the weeds around the monitoring box 16.

[0050] At the same time, when the second protrusion 22 rotates, it passes through the filter 15 and scrapes off the impurities remaining on the surface of the filter 15 to prevent the filter 15 from being blocked and improve the liquid intake effect of the filter 15. After a certain amount of liquid is extracted from the first cavity 40, the second motor 23 is started, and the second motor 23 drives the baffle 26 to rotate. When the baffle 26 rotates, the block 36 no longer blocks the air guide hole 34. At the same time, the rotation of the baffle 26 drives the stirring rod 24 to stir the liquid in the chamber 35. During the stirring process, the methane contained in the liquid enters the upper part of the baffle 26 through the air guide hole 34, so that the methane monitor 30 monitors the methane contained in the gas. After the monitoring is completed, the baffle 26 is rotated to the initial position, and the block 36 still blocks the air guide hole 34.

[0051] When the liquid in the chamber 35 needs to be discharged, the third electric push rod 39 is started to drive the piston plate 28 to move upward, and the piston plate 28 moves upward to squeeze the liquid out of the second channel 37. Since the stirring rod 24 is slidably mounted on the baffle plate 26, the stirring rod 24 is driven to move upward when the piston plate 28 moves upward, and the second spring 25 is stretched, so that the stirring rod 24 does not hinder the piston plate 28 from moving upward.

[0052] After the monitoring is completed, the first electric push rod 13 is started to drive the monitoring box 16 to move upward, and the first motor 6 is started to drive the threaded rod 2 to rotate. The rotation of the threaded rod 2 drives the sliding table 4 to move upward. When the monitoring box 16 is located in the middle of the two protective covers 12, the sliding table 4 continues to move upward and squeezes the first slider 7 upward through the second slider 20. The first slider 7 moves upward and stretches the first spring 8. At the same time, the first slider 7 moves upward through the two connecting rods 9 to drive the two protective covers 12 to move closer to the middle, so that the monitoring box 16 is wrapped by the protective cover 12, so that the surface of the monitoring box 16 is not easy to fall dust, thereby improving the protection of the monitoring box 16 and preventing damage caused by accidental bumps.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A methane gas concentration monitoring system, comprising a base (1), characterized in that: A guide column (3) is fixedly arranged on the top of the base (1); a support plate (5) is fixedly arranged on the other end of the guide column (3); a sliding platform (4) is slidably arranged on the guide column (3); a first driving component for driving the sliding platform (4) to move is arranged on the support plate (5); a monitoring box (16) is arranged on the sliding platform (4); a methane monitor (30) and a second motor (23) are fixedly arranged on the top wall of the monitoring box (16); a baffle (26) is fixedly arranged on the output shaft of the second motor (23); the baffle (26) is rotatably connected to the monitoring box (16); a stirring rod (24) is arranged on the baffle (26); and an air guide is provided on the baffle (26). A hole (34) is formed in the monitoring box (16), a piston plate (28) is slidably arranged in the monitoring box (16), a second driving component is arranged on the monitoring box (16) for driving the piston plate (28) to move, a water storage chamber (35) is formed between the piston plate (28) and the baffle plate (26), a first channel (33) and a second channel (37) are opened on the monitoring box (16) and communicated with the chamber (35), a first check valve (32) is arranged in the first channel (33), a filter screen (15) is fixedly arranged at the inlet of the first channel (33), a second check valve (38) is arranged in the second channel (37), and a weed removal component for cleaning weeds is arranged on the monitoring box (16).

2. The methane gas concentration monitoring system according to claim 1, characterized in that: The impurity removal component comprises a transmission component and a second connecting rod (14), the second connecting rod (14) is slidably connected to the monitoring box (16), a limiting groove (18) is provided on the monitoring box (16) along its circumference, a third slider (21) is slidably arranged in the limiting groove (18), the third slider (21) is fixedly connected to the second connecting rod (14), the second connecting rod (14) is in an "L" shape, a plurality of second protrusions (22) are fixedly arranged on the inner side of the second connecting rod (14), the plurality of second protrusions (22) are arranged at intervals, a plurality of first protrusions (17) are fixedly arranged on the outer side of the monitoring box (16), the plurality of first protrusions (17) are arranged at intervals, and the first protrusions (17) and the second protrusions (22) are arranged in an alternating manner; the transmission component is connected to the piston plate (28), and the piston plate (28) drives the second connecting rod (14) to rotate through the transmission component.

3. The methane gas concentration monitoring system according to claim 2, characterized in that: The transmission assembly comprises a lead screw (29), the lead screw (29) is fixedly arranged at the bottom of the piston plate (28), a nut (31) is arranged on the lead screw (29), the nut (31) is fixedly connected to the second connecting rod (14), and a steel ball is used as a rolling body between the nut (31) and the lead screw (29), so that the lead screw (29), the nut (31) and the steel ball form a ball screw pair.

4. The methane gas concentration monitoring system according to claim 2, characterized in that: The third sliding block (21) is in the shape of an isosceles trapezoid. When the third sliding block (21) slides along the limiting groove (18), it cleans the impurities in the limiting groove (18).

5. The methane gas concentration monitoring system according to claim 1, characterized in that: The first driving assembly comprises a first motor (6), the first motor (6) is fixedly arranged on the top of the support plate (5), a threaded rod (2) is fixedly arranged on the output shaft of the first motor (6), the threaded rod (2) passes through the sliding table (4) and is threadedly connected to the sliding table (4), and the other end of the threaded rod (2) is rotatably connected to the base (1).

6. The methane gas concentration monitoring system according to claim 1, characterized in that: A stopper (36) is fixedly provided on the inner wall of the chamber (35), and the stopper (36) blocks the air guide hole (34) to prevent liquid from entering the air guide hole (34) during drainage.

7. The methane gas concentration monitoring system according to claim 1, characterized in that: The second driving assembly comprises a third electric push rod (39), which is fixedly arranged in the box wall of the monitoring box (16), and the output end of the third electric push rod (39) is fixedly connected to the piston plate (28).

8. The methane gas concentration monitoring system according to claim 1, characterized in that: A second electric push rod (19) is fixedly arranged on the sliding platform (4), a second slider (20) is fixedly arranged at the output end of the second electric push rod (19), the second slider (20) is slidably connected to the sliding platform (4), and the bottom of the second slider (20) is connected to the monitoring box (16).

9. The methane gas concentration monitoring system according to claim 8, characterized in that: A first electric push rod (13) is fixedly arranged at the bottom of the second sliding block (20), and an output end of the first electric push rod (13) is fixedly connected to a monitoring box (16).

10. The methane gas concentration monitoring system according to claim 8, characterized in that: A first slider (7) is slidably arranged on the support plate (5), the first slider (7) is abutted against the second slider (20), a connecting plate is fixedly arranged on the top of the first slider (7), a first spring (8) is fixedly arranged between the connecting plate and the support plate (5), two connecting rods (9) are hingedly arranged on one side of the first slider (7), a first connecting rod (11) is hingedly arranged on the other end of the connecting rod (9), a fixed block is symmetrically fixedly arranged on the support plate (5), a first sliding groove (10) is opened on the fixed block, the first connecting rod (11) passes through the corresponding first sliding groove (10) and is slidably connected to the first sliding groove (10), a protective cover (12) is fixedly arranged on the first connecting rod (11), and the protective cover (12) protects the monitoring box (16).

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