A municipal pipe well cover with odor detection and an implementation method thereof

Abstract

This invention discloses a municipal pipeline manhole cover with odor detection and its implementation method, belonging to the technical field of pipeline manhole covers. A municipal pipeline manhole cover with odor detection includes a manhole cover, which is movably connected to a manhole base via a coupling assembly. A control component is provided on the inner wall of the manhole cover; a reinforcing component is provided on the bottom wall of the manhole cover. This invention solves the problems of existing sensors having fixed positions and narrow detection ranges, as well as the lack of cleaning sensors. This invention uses a hook plate fitted onto a hook rod, making installation and removal convenient. During maintenance, simply opening the manhole cover allows for inspection and replacement. The sensor position decreases, increasing the detection depth. After the odor is eliminated, the sensor position moves upward, and the airflow from the fan directs towards the sensor, effectively removing dust and moisture from the sensor, thus preventing detection data delays and inaccuracies. This achieves the goal of ensuring that sensor movement does not affect fan rotation.

Description

Technical Field

[0001] This invention relates to the field of manhole cover technology, specifically to a municipal manhole cover with odor detection and its implementation method. Background Technology

[0002] Publication (Announcement) No. CN218813900U discloses a manhole cover device capable of detecting gas odors, including a manhole base and a manhole cover body. The manhole cover body is hinged to the upper end of the manhole base. The manhole cover body is provided with an exhaust hole. A deodorizing exhaust device is provided on the lower end face of the manhole cover body corresponding to the exhaust hole. A pressure gauge and an odor detection gauge are respectively embedded in the upper end face of the manhole cover body. The measuring ends of the pressure gauge and the odor detection gauge both extend into the lower part of the manhole cover body. An odor acquisition mechanism is provided on the lower end face of the manhole cover body corresponding to the odor detection gauge.

[0003] While the aforementioned patent can relieve pressure and eliminate odors, it still has the following drawbacks:

[0004] The fixed location of the odor detector results in a low detection range, and the lack of equipment for cleaning the surface of the odor detector means that the odor detector is left in the well for a long time. Dust and moisture drawn up by the negative pressure of the fan will adhere to the odor detector, leading to inaccurate detection data over time. Summary of the Invention

[0005] The purpose of this invention is to provide a municipal pipeline manhole cover with odor detection capabilities. By using a hook plate to attach to a hook rod, installation and removal are convenient, allowing for easy maintenance and replacement by simply opening the manhole cover. The sensor position decreases, increasing the detection depth. After the odor is eliminated, the sensor position shifts upwards, and the airflow from the fan is directed towards the sensor, effectively removing dust and moisture from the sensor, thus preventing detection delays and inaccuracies. This invention achieves the goal of ensuring that sensor movement does not affect fan rotation, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a municipal pipeline manhole cover with odor detection, comprising a manhole cover, wherein the manhole cover and the manhole base are movably connected by a coupling assembly, and a control component is provided on the inner wall of the manhole cover;

[0007] The bottom wall of the manhole cover is provided with a reinforcing component, and the reinforcing component is provided with a rotating exhaust component and a shrinkage detection component.

[0008] Preferably, the coupling assembly includes a pin seat, a first rotating shaft, a connecting rod, a second pin, a third pin, and an ear seat. The pin seat is placed in a groove on the inner wall of the well cover. The first rotating shaft passes through the pin seat and is movably connected to the groove. The front end of the pin seat is movably connected to one end of the connecting rod through the second pin. The other end of the connecting rod is movably connected to the ear seat on the well cover through the third pin.

[0009] Preferably, the control assembly includes a control box, a control circuit board, a battery, and a control wiring harness. The top surface of the control box is provided with a shock-absorbing spring, and the control box is connected to the bottom wall of the manhole cover through the shock-absorbing spring. The control circuit board and the battery are placed inside the control box, and the control circuit board and the battery are connected by wires. The control wiring harness connected to the control circuit board extends out of the control box.

[0010] Preferably, the reinforcing component includes a reinforcing ring and reinforcing ribs. The reinforcing ring is coaxially arranged with the manhole cover and fixed to the bottom wall of the manhole cover, and the reinforcing ribs are distributed in a ring shape on the outer wall of the reinforcing ring and fixed to the manhole cover.

[0011] Preferably, the manhole cover surrounded by the reinforcing ring is provided with a plurality of vent holes, and the vent holes are honeycomb-shaped.

[0012] Preferably, the rotary exhaust assembly includes a motor cover, a motor, a motor frame, a motor shaft, a screw, and a limiting rod. The outer wall of the motor is fixed to the inner wall of the reinforcing ring through the motor frame, and the motor cover connected to the motor frame separates the motor from the exhaust port.

[0013] One end of the motor shaft is connected to the motor shaft, and a fan is fixed on the motor shaft. The other end of the motor shaft is fixed by a screw and a limiting rod. The motor shaft, screw, and limiting rod are coaxial and have the same outer diameter.

[0014] Preferably, the shrinkage detection assembly includes a screw sleeve, a telescopic outer sleeve, a telescopic inner rod, a built-in spring, a hook plate, a pin seat, and a fourth pin shaft. The screw sleeve moves along the motor shaft, the screw, and the limiting rod. The outer wall of the screw sleeve is fixed with equally spaced pin seats and a sensor. The sensor is wirelessly connected to the control circuit board. Each pin seat is movably connected to one end of the telescopic outer sleeve by inserting into the fourth pin shaft. One end of the telescopic inner rod is inserted into the telescopic outer sleeve, and the other end of the telescopic inner rod is connected to the hook plate.

[0015] The built-in spring is placed inside the telescopic outer sleeve to connect the telescopic outer sleeve and the telescopic inner rod.

[0016] Preferably, the inner wall of the reinforcing ring is provided with a hook groove corresponding to the number of hook plates, and a hook rod is fixed in the hook groove, with the hook plate sleeved on the hook rod.

[0017] A method for implementing a municipal pipeline manhole cover with odor detection capability includes the following steps:

[0018] S1: The control circuit board receives the sensor detection signal from station one, and after the sensor detects abnormal gas data signal, the control circuit board transmits the command signal to the motor through the control harness.

[0019] S2: After receiving the control command from the control circuit board, the motor drives the motor shaft, screw, and limit rod to rotate synchronously in one direction. During rotation, if the rotation direction of the thread of the sleeve is different from that of the screw, the sleeve will be screwed into the screw and move downward along the screw. The built-in spring between the telescopic inner rod and the telescopic outer rod will slowly stretch until the sleeve moves down and disengages from the screw thread. The sensor moves to station two, and the rotation direction of the thread of the sleeve is the same as that of the screw thread. The motor shaft drives the fan to rotate, drawing gas from the well and discharging it from the exhaust port.

[0020] S3: The sensor receives the detection signal from the sensor at station two. After the gas data detected by the sensor is normal, the motor drives the motor shaft, screw, and limit rod to rotate synchronously in the opposite direction. The rotation direction of the thread of the sleeve is different from that of the thread of the screw. The sleeve will be screwed into the screw and move upward along the screw. The built-in spring between the telescopic inner rod and the telescopic outer rod will slowly shorten until the sleeve moves upward and disengages from the thread of the screw. The sensor moves to station one. The rotation direction of the thread of the sleeve is the same as that of the thread of the screw. The motor shaft drives the fan to rotate in the opposite direction to blow away the particulate dust and water vapor adsorbed on the sensor. The blowing continues for 10 minutes and then stops.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The present invention uses a hook plate fitted onto a hook rod, making it easier to install and disassemble. Furthermore, the entire rotating exhaust assembly and shrinkage detection assembly are mounted on the manhole cover, making it convenient to perform maintenance and replacement by simply opening the manhole cover.

[0023] 2. This invention transmits detection data wirelessly through the sensor. After the screw sleeve is screwed into the screw, it descends, and the sensor position decreases, increasing the detection depth. The fan continues to rotate, constantly extracting gas from the well. After the odor is eliminated, the sensor position moves upward, and the airflow blown by the fan is directed towards the sensor, effectively removing dust and moisture from the sensor. This avoids a large amount of impurities adsorbing on the sensor, which would cause detection data delays and inaccuracies. The invention achieves the goal of not affecting the fan rotation when the sensor moves. Attached Figure Description

[0024] Figure 1 This is a diagram showing the closed state of the manhole cover according to the present invention;

[0025] Figure 2 This is a diagram showing the open state of the manhole cover according to the present invention.

[0026] Figure 3 This is a cross-sectional view of the control component of the present invention;

[0027] Figure 4 This is a state diagram of the sensor of the present invention located at a workstation.

[0028] Figure 5 This is a diagram showing the sensor of the present invention in two states at the workstation.

[0029] Figure 6 This is a structural diagram of the rotary exhaust assembly and shrinkage detection assembly of the present invention;

[0030] Figure 7 This is a connection diagram of the telescopic outer sleeve and the telescopic inner rod of the present invention.

[0031] In the diagram: 1. Manhole cover; 2. Manhole base; 3. Coupling assembly; 31. Pin seat; 32. First rotating shaft; 33. Connecting rod; 34. Second pin; 35. Third pin; 36. Ear seat; 4. Control assembly; 41. Control box; 411. Shock-absorbing spring; 42. Control circuit board; 43. Battery; 44. Control wiring harness; 5. Reinforcing assembly; 51. Reinforcing ring; 52. Reinforcing rib; 6. Rotary exhaust assembly; 61. Motor cover; 62. Motor; 63. Motor frame; 64. Motor shaft; 65. Screw; 66. Limiting rod; 7. Contraction detection assembly; 71. Screw sleeve; 72. Telescopic outer sleeve; 73. Telescopic inner rod; 74. Built-in spring; 75. Hook plate; 76. Pin seat. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To address the issues of existing odor detectors having fixed locations resulting in limited detection ranges and lacking surface cleaning equipment, causing them to remain inside the shaft for extended periods, dust and moisture drawn in by the fan's negative pressure accumulate on the detectors, leading to inaccurate readings over time, please refer to [the relevant documentation / reference needed]. Figures 1-7 This embodiment provides the following technical solution:

[0034] A municipal pipeline manhole cover with odor detection includes a manhole cover 1, which is movably connected to a manhole base 2 via a coupling assembly 3. A control assembly 4 is provided on the inner wall of the manhole cover 1. A reinforcing assembly 5 is provided on the bottom wall of the manhole cover 1, and a rotating exhaust assembly 6 and a shrinkage detection assembly 7 are provided inside the reinforcing assembly 5.

[0035] Specifically, the manhole cover 1 rotates around the manhole base 2 via the coupling assembly 3, enabling the manhole cover 1 to open or close. The control assembly 4 controls the rotating exhaust assembly 6 and the shrinkage detection assembly 7. After the shrinkage detection assembly 7 detects odor data, the data is transmitted to the control assembly 4, which then drives the rotating exhaust assembly 6 to start and exhaust the odor. The control assembly 4 is also connected to an existing server to upload data to the server in real time. If the odor still cannot be expelled after the rotating exhaust assembly 6 has been running for a long time, the server will dispatch personnel to conduct an on-site inspection of the manhole and eliminate any abnormalities.

[0036] The coupling assembly 3 includes a pin seat 31, a first rotating shaft 32, a connecting rod 33, a second pin 34, a third pin 35, and an ear seat 36. The pin seat 31 is placed in a groove in the inner wall of the well cover 2. The first rotating shaft 32 passes through the pin seat 31 and is movably connected to the groove. The front end of the pin seat 31 is movably connected to one end of the connecting rod 33 through the second pin 34. The other end of the connecting rod 33 is movably connected to the ear seat 36 on the well cover 1 through the third pin 35.

[0037] Specifically, the first rotating shaft 32, the second pin 34, and the third pin 35 are set as rotating shafts for the manhole cover 1 to rotate along a set trajectory.

[0038] The control assembly 4 includes a control box 41, a control circuit board 42, a battery 43, and a control wiring harness 44. The top surface of the control box 41 is provided with a shock-absorbing spring 411. The control box 41 is connected to the bottom wall of the manhole cover 1 through the shock-absorbing spring 411. The control circuit board 42 and the battery 43 are placed inside the control box 41. The control circuit board 42 and the battery 43 are connected by wires. The control wiring harness 44 is connected to the control circuit board 42 and extends out of the control box 41.

[0039] Specifically, the shock-absorbing spring 411 plays a shock-absorbing and protective role for the control box 41. Since the manhole cover 1 is usually installed on the side of the road, the vibration generated by passing cars will also be transmitted to the manhole cover 1. The shock-absorbing spring 411 absorbs some of the vibration, avoiding the problem of the wiring harness falling off due to the vibration of the control circuit board 42 and the battery 43.

[0040] The reinforcing component 5 includes a reinforcing ring 51 and reinforcing ribs 52. The reinforcing ring 51 is coaxially arranged with the manhole cover 1 and fixed to the bottom wall of the manhole cover 1. The reinforcing ribs 52 are distributed in a ring on the outer wall of the reinforcing ring 51 and fixed to the manhole cover 1. The manhole cover 1 surrounded by the reinforcing ring 51 is provided with several vent holes, and the vent holes are honeycomb-shaped.

[0041] The rotary exhaust assembly 6 includes a motor cover 61, a motor 62, a motor frame 63, a motor shaft 64, a screw 65, and a limiting rod 66. The outer wall of the motor 62 is fixed to the inner wall of the reinforcing ring 51 through the motor frame 63. The motor cover 61 connected to the motor frame 63 separates the motor 62 from the exhaust port. One end of the motor shaft 64 is connected to the shaft of the motor 62, and a fan is fixed on the motor shaft 64. The other end of the motor shaft 64 is fixed through the screw 65 and the limiting rod 66. The motor shaft 64, the screw 65, and the limiting rod 66 are coaxial and have the same outer diameter.

[0042] Specifically, the motor cover 61 separates the motor 62 from the exhaust port. Dust falling from the exhaust port is guided down by the motor cover 61 to prevent it from falling on the motor 62. At the same time, it does not affect the airflow when the fan is rotating, and guides the airflow to be discharged from the exhaust port.

[0043] The shrinkage detection assembly 7 includes a threaded sleeve 71, a telescopic outer sleeve 72, a telescopic inner rod 73, a built-in spring 74, a hook plate 75, a pin seat 76, and a fourth pin shaft. The threaded sleeve 71 moves along the motor shaft 64, the screw 65, and the limit rod 66. The outer wall of the threaded sleeve 71 is fixed with equally spaced pin seats 76 and a sensor. The sensor is wirelessly connected to the control circuit board 42. Each pin seat 76 is movably connected to one end of the telescopic outer sleeve 72 by inserting into the fourth pin shaft. One end of the telescopic inner rod 73 is inserted into the telescopic outer sleeve 72, and the other end of the telescopic inner rod 73 is connected to the hook plate 75. The built-in spring 74 is placed inside the telescopic outer sleeve 72 to connect the telescopic outer sleeve 72 and the telescopic inner rod 73.

[0044] The inner wall of the reinforcing ring 51 is provided with hook grooves corresponding to the number of hook plates 75, and hook rods are fixed in the hook grooves, with hook plates 75 fitted onto the hook rods.

[0045] Specifically, the hook plate 75 is fitted onto the hook rod, making it easier to install and remove. The entire rotating exhaust assembly 6 and the shrinkage detection assembly 7 are assembled on the manhole cover 1, so that maintenance and replacement can be carried out by simply opening the manhole cover 1.

[0046] In this detection structure, under normal conditions, the sensor is located at station one, near the fan, and the fan is not operating. The sensor transmits the detected data wirelessly. When the control circuit board 42 detects an abnormal gas data, it controls the motor 62 to start. During the rotation of the motor shaft 64, under the compression force of the built-in spring 74, the screw sleeve 71 is screwed into the screw 65 and descends. At the same time, the fan rotates to draw gas from the well channel and discharge it from the exhaust port. As the screw sleeve 71 continues to descend until it rotates onto the limit rod 66, the sensor moves to the station. Secondly, by lowering the sensor position to increase the detection depth and maintaining the continuous rotation of the fan, after the odor is eliminated, the control motor 62 drives the screw 65 to reverse. Under the tension of the built-in spring 74, the screw sleeve 71 moves upward and screws into the screw 65. After the screw sleeve 71 moves upward to the motor shaft 64, it moves to the first workstation. Because the fan rotates in the opposite direction, the airflow blows towards the sensor. By tightening the distance between the two, the airflow can effectively remove dust and moisture from the sensor, avoiding a large amount of impurities adsorbed on the sensor, which would cause delays and inaccuracies in the detection data.

[0047] To better demonstrate the implementation process of the aforementioned municipal pipeline manhole cover, this embodiment provides an implementation method for a municipal pipeline manhole cover with odor detection capabilities, including the following steps:

[0048] Step 1: The control circuit board 42 receives the sensor detection signal from station 1, and after the sensor detects the abnormal gas data signal, the control circuit board 42 transmits the command signal to the motor 62 through the control harness 44.

[0049] Step 2: After receiving the control command from the control circuit board 42, the motor 62 drives the motor shaft 64, screw 65 and limit rod 66 to rotate synchronously in one direction. During rotation, the rotation direction of the thread of the sleeve 71 is different from the thread direction of the screw 65. The sleeve 71 will be screwed into the screw 65 and move downward along the screw 65. The built-in spring 74 between the telescopic inner rod 73 and the telescopic outer sleeve 72 will slowly stretch until the sleeve 71 moves down and disengages from the thread of the screw 65. The sensor moves to station 2. The rotation direction of the thread of the sleeve 71 is the same as the thread direction of the screw 65. The motor shaft 64 drives the fan to rotate and draw gas from the well to be discharged from the exhaust port.

[0050] Step 3: The sensor receives the sensor detection signal from station 2. After the gas data detected by the sensor is normal, motor 62 drives motor shaft 64, screw 65 and limit rod 66 to rotate synchronously in the opposite direction. The rotation direction of the thread of the sleeve 71 is different from the thread direction of the screw 65. The sleeve 71 will be screwed into the screw 65 and move upward along the screw 65. The built-in spring 74 between the telescopic inner rod 73 and the telescopic outer sleeve 72 will slowly shorten until the sleeve 71 moves upward and disengages from the thread of the screw 65. The sensor moves to station 1. The rotation direction of the thread of the sleeve 71 is the same as the thread direction of the screw 65. Motor shaft 64 drives the fan to rotate in the opposite direction to blow away the particulate dust and water vapor adsorbed on the sensor. The blowing continues for 10 minutes and then stops.

[0051] Working principle: The sensor transmits the detected data wirelessly. When the control circuit board 42 detects an abnormal gas data, it controls the motor 62 to start. The screw sleeve 71 is screwed into the screw 65 and descends. As the sensor position decreases, the detection depth is increased. The fan continues to rotate, continuously extracting gas from the well. After the odor is eliminated, the control motor 62 drives the screw 65 to reverse. The screw sleeve 71 moves upward and is screwed onto the screw 65. After the screw sleeve 71 moves upward to the motor shaft 64, it moves to station one. The airflow blown by the fan is directed towards the sensor, effectively removing dust and moisture from the sensor and preventing a large amount of impurities from adsorbing on the sensor, which would cause delays and inaccuracies in the detection data.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. A municipal pipeline manhole cover with odor detection capability, comprising a manhole cover (1), characterized in that, The manhole cover (1) and the manhole base (2) are movably connected by a coupling assembly (3). The inner wall of the manhole cover (1) is provided with a control assembly (4). The bottom wall of the manhole cover (1) is provided with a reinforcing assembly (5). The reinforcing assembly (5) is provided with a rotary exhaust assembly (6) and a shrinkage detection assembly (7). The shrinkage detection assembly (7) includes a threaded sleeve (71), a telescopic outer sleeve (72), a telescopic inner rod (73), a built-in spring (74), a hook plate (75), a pin seat (76), and a fourth pin shaft. The control assembly (4) includes a control box (41), a control circuit board (42), a storage battery (43), and a control wiring harness (44). The top surface of the control box (41) is provided with A shock-absorbing spring (411) and a control box (41) are connected to the bottom wall of the manhole cover (1) via the shock-absorbing spring (411). A control circuit board (42) and a battery (43) are placed inside the control box (41). The control circuit board (42) and the battery (43) are connected by wires. A control wiring harness (44) is connected to the control circuit board (42) and passes through the control box (41). The reinforcing component (5) includes a reinforcing ring (51) and reinforcing ribs (52). The reinforcing ring (51) is coaxially arranged with the manhole cover (1) and fixed to the bottom wall of the manhole cover (1). The reinforcing ribs (52) are distributed in a ring on the outer wall of the reinforcing ring (51) and fixed to the manhole cover (1). The reinforcing ring (51) is provided with shock-absorbing springs (411) and connected to the bottom wall of the manhole cover (1) via shock-absorbing springs (411). A control circuit board (42) and a battery (43) are placed inside the control box (41). The control circuit board (42) and the battery (43) are connected by wires. A control wiring harness (44) is connected to the control circuit board (42) and passes through the control box (41). The reinforcing component (51) includes a reinforcing ring (51) and a reinforcing rib (52). The reinforcing ring (51) is coaxially arranged with the manhole cover (1) and fixed to the bottom wall of the manhole cover (1 ... 1) The manhole cover (1) is provided with several vent holes, and the vent holes are honeycomb-shaped. The rotary venting assembly (6) includes a motor cover (61), a motor (62), a motor frame (63), a motor shaft (64), a screw (65), and a limiting rod (66). The outer wall of the motor (62) is fixed to the inner wall of the reinforcing ring (51) through the motor frame (63). The motor cover (61) connected to the motor frame (63) separates the motor (62) from the vent holes. One end of the motor shaft (64) is connected to the shaft of the motor (62). A fan is fixed on the motor shaft (64). The other end of the motor shaft (64) is fixed through the screw (65) and the limiting rod (66). 64) The screw (65) and the limiting rod (66) are coaxial and have the same outer diameter. The screw sleeve (71) moves along the motor shaft (64), the screw (65) and the limiting rod (66). The outer wall of the screw sleeve (71) is fixed with equally spaced pin seats (76) and sensors. The sensors are wirelessly connected to the control circuit board (42). Each of the pin seats (76) is movably connected to one end of the telescopic outer sleeve (72) by inserting a fourth pin shaft. One end of the telescopic inner rod (73) is inserted into the telescopic outer sleeve (72), and the other end of the telescopic inner rod (73) is connected to the hook plate (75). The built-in spring (74) is placed inside the telescopic outer sleeve (72) to connect the telescopic outer sleeve (72) and the telescopic inner rod (73).

2. A municipal pipeline manhole cover with odor detection as described in claim 1, characterized in that: The coupling assembly (3) includes a pin seat (31), a first rotating shaft (32), a connecting rod (33), a second pin (34), a third pin (35), and an ear seat (36). The pin seat (31) is placed in a groove in the inner wall of the well cover (2). The first rotating shaft (32) passes through the pin seat (31) and is movably connected to the groove. The front end of the pin seat (31) is movably connected to one end of the connecting rod (33) through the second pin (34). The other end of the connecting rod (33) is movably connected to the ear seat (36) on the well cover (1) through the third pin (35).

3. A municipal pipeline manhole cover with odor detection as described in claim 1, characterized in that: The inner wall of the reinforcing ring (51) is provided with a hook groove corresponding to the number of hook plates (75), and a hook rod is fixed in the hook groove, with the hook plate (75) sleeved on the hook rod.

4. A method for implementing a municipal pipeline manhole cover with odor detection as described in claim 3, characterized in that: Includes the following steps: S1: The control circuit board (42) receives the sensor detection signal from station 1, and after the sensor detects the abnormal gas data signal, the control circuit board (42) transmits the command signal to the motor (62) through the control harness (44). S2: After receiving the control command from the control circuit board (42), the motor (62) drives the motor shaft (64), screw (65) and limit rod (66) to rotate synchronously in one direction. When rotating, the rotation direction of the thread of the sleeve (71) is different from the thread direction of the screw (65). The sleeve (71) will be screwed into the screw (65) and move downward along the screw (65). The built-in spring (74) between the telescopic inner rod (73) and the telescopic outer sleeve (72) will slowly stretch until the sleeve (71) moves down and disengages from the thread of the screw (65). The sensor moves to station two. The rotation direction of the thread of the sleeve (71) is the same as the thread direction of the screw (65). The motor shaft (64) drives the fan to rotate and extracts the gas in the well and discharges it from the exhaust hole. S3: The control circuit board (42) receives the sensor detection signal from station two. After the gas data detected by the sensor is normal, the motor (62) drives the motor shaft (64), screw (65) and limit rod (66) to rotate synchronously in the opposite direction. The rotation direction of the thread of the sleeve (71) is different from the thread direction of the screw (65). The sleeve (71) will be screwed into the screw (65) and move upward along the screw (65). The built-in spring (74) between the telescopic inner rod (73) and the telescopic outer sleeve (72) will slowly shorten until the sleeve (71) moves upward and disengages from the thread of the screw (65). The sensor moves to station one. The rotation direction of the thread of the sleeve (71) is the same as the thread direction of the screw (65). The motor shaft (64) drives the fan to rotate in the opposite direction to blow away the particulate dust and water vapor in the gas adsorbed by the sensor. After blowing for 10 minutes, it stops.

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