Intelligent well lid

Abstract

The invention relates to an intelligent well lid which comprises a well lid body and an early warning detection device, the early warning detection device is arranged on the well lid body and comprises an environment detection unit, a state detection unit, a communication module, a main control module and a buzzer, and the environment detection unit, the state detection unit, the communication module and the buzzer are all electrically connected with the main control module. The communication module is used for establishing communication connection with a cloud server cluster; the environment detection unit comprises a water level sensor and a methane sensor; the state detection unit comprises a gyroscope sensor. The environment of an underground pipeline is detected through the water level sensor and the methane sensor, and the state of the well lid body is detected through the gyroscope sensor. When the well lid body is abnormal, on one hand, the buzzer sounds to warn passers-by and remind the passers-by to avoid the well lid body, and therefore potential risks caused by the well lid body are reduced to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of municipal engineering equipment technology, specifically to a smart manhole cover. Background Technology

[0002] With the acceleration of urbanization, urban infrastructure construction is constantly improving. Manhole covers, as an important component of urban roads, drainage, and communication systems, are numerous and widely distributed.

[0003] Manhole covers are mostly made of cast iron and other metal materials, which have some recycling value, leading to frequent thefts. Stolen manhole covers not only cause damage to public property but also create significant safety hazards, as pedestrians and vehicles can easily fall into them, causing injuries or fatalities. Furthermore, during improper road construction and underground pipeline maintenance, manhole covers may be moved or improperly repositioned by unauthorized personnel. This results in potholes on the road surface, further increasing the risk of traffic accidents.

[0004] Frequent accidents involving manhole covers are mainly due to the current simplistic management methods, which rely solely on regular manual inspections. This not only consumes a lot of manpower and resources but also makes it difficult to detect accidents in a timely manner, posing safety hazards to pedestrians. Summary of the Invention

[0005] Based on the above description, the present invention provides an intelligent manhole cover, which aims to solve the problem that existing manual periodic inspections cannot detect safety hazards in manhole covers in a timely manner.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A smart manhole cover includes:

[0008] Manhole cover body;

[0009] An early warning detection device is installed on the main body of the manhole cover. The early warning detection device includes an environmental detection unit, a status detection unit communication module, and a main control module. The environmental detection unit, the status detection unit communication module, and the buzzer are all electrically connected to the main control module. The communication module is used to establish a communication connection with the modular data center.

[0010] The environmental monitoring unit includes a water level sensor and a methane sensor. The water level sensor is used to detect the water level in the downhole pipeline, and the methane sensor is used to detect the methane concentration in the downhole pipeline.

[0011] The status detection unit includes a gyroscope sensor, which is used to detect the tilt angle of the manhole cover body;

[0012] The main control module is used to send control signals to the buzzer when it receives at least one of the abnormal water level, abnormal methane concentration, and abnormal tilt angle information fed back to the main control module by the cloud server cluster via the communication module.

[0013] The buzzer is used to sound an alarm in accordance with the control signal.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the status detection unit includes an ultrasonic sensor, which is used to detect the displacement of the manhole cover body;

[0016] The main control module is used to send the displacement to the cloud server cluster via the communication module and to send a control signal to the buzzer when it receives displacement abnormality information fed back to the main control module by the cloud server cluster via the communication module.

[0017] Furthermore, a high-speed digital signal processor and a filter are connected in series between the ultrasonic sensor and the main control module.

[0018] Furthermore, the environmental detection unit includes a light intensity sensor, which is used to detect the light intensity of the downhole pipeline;

[0019] The main control module is used to send the light intensity to the cloud server cluster via the communication module, and to send a control signal to the buzzer when it receives light intensity abnormality information from the cloud server cluster via the communication module to the main control module.

[0020] Furthermore, it includes a positioning module, which is communicatively connected to the main control module, and is used to obtain the position information of the manhole cover body.

[0021] Furthermore, the device includes a limiting mechanism comprising a housing, a drive motor, a transmission assembly, and limiting rods. The housing is connected to the main body of the manhole cover. The early warning detection device is located on the side of the housing away from the main body of the manhole cover. The drive motor and the transmission assembly are both located inside the housing. The transmission assembly is connected to the output end of the drive motor. There are multiple limiting rods, all of which are arranged at intervals along the circumference of the housing. One end of each limiting rod penetrates the side wall of the housing and extends to connect with the transmission assembly.

[0022] Furthermore, the transmission assembly includes a support platform, a turntable, and a movable arm. The support platform and the turntable are arranged sequentially in the vertical direction. The support platform is fixed to the top or side wall of the housing by multiple fixing rods. Multiple sliding channels are provided on the support platform. The number of sliding channels and the number of movable arms are related to the number of limiting rods, and the sliding channels and movable arms are arranged one-to-one with the limiting rods. Each sliding channel includes a sliding hole, a first guide hole, and a second guide hole. The first guide hole and the second guide hole are connected to the sliding hole and are symmetrical about the defined central axis. The turntable has an arc-shaped hole corresponding to each sliding channel. One end of the movable arm is inserted into the sliding hole, and a connecting rod is provided at one end of the movable arm located in the sliding hole. One end of the connecting rod passes through the first guide hole and is inserted into the guide hole, and the other end of the connecting rod is inserted into the second guide hole. One end of the limiting rod is connected to the other end of the movable arm.

[0023] Furthermore, the limiting mechanism includes arc-shaped reinforcing plates, the number of which is related to the number of connecting rods, and the arc-shaped reinforcing plates are correspondingly disposed at the other end of the limiting rod.

[0024] Furthermore, the manhole cover body is equipped with a solar panel, which is used to power the early warning detection device.

[0025] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0026] (1) This application uses a water level sensor and a methane sensor to detect the environment of the underground pipeline and a gyroscope sensor to detect the status of the manhole cover. When the manhole cover shows abnormalities, a buzzer is sounded to warn passersby and remind them to avoid the area, thereby minimizing the potential risks posed by the manhole cover.

[0027] (2) In this application, when the ultrasonic sensor transmits data signals to the main control module, the high-speed digital signal processor extracts the noise in the data signal and then filters out the noise through a filter, thereby ensuring that the main control module accurately resolves the displacement.

[0028] (3) This application uses a limiting mechanism to limit the main body of the manhole cover. On the one hand, it can prevent the main body of the manhole cover from being blown away when the water level or methane concentration is too high, and on the other hand, it can prevent the main body of the manhole cover from being stolen. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the early warning detection device in an embodiment of the present invention;

[0030] Figure 2This is a circuit connection diagram of some other embodiments of the ultrasonic sensor in this invention;

[0031] Figure 3 This is a schematic diagram of the assembly of the limiting mechanism and the manhole cover body in an embodiment of the present invention;

[0032] Figure 4 This is a sectional view of the manhole cover body and the limiting mechanism in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the transmission assembly in an embodiment of the present invention;

[0034] Figure 6 This is a sectional view of the support platform in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the turntable structure in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the moving arm in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Manhole cover body;

[0039] 20. Early warning detection device; 21. Environmental monitoring unit; 211. Water level sensor; 212. Methane sensor; 22. Status monitoring unit; 221. Gyroscope sensor; 222. Ultrasonic sensor; 2221. High-speed digital signal processor; 2222. Filter; 223. Light intensity sensor; 23. Communication module; 24. Main control module; 25. Buzzer; 26. Positioning module;

[0040] 30. Limiting mechanism; 31. Housing; 32. Drive motor; 33. Transmission assembly; 331. Support platform; 3311. Fixed rod; 3312. Sliding channel; 33121. Sliding hole; 33122. First guide hole; 33123. Second guide hole; 332. Turntable; 341. Arc-shaped hole; 333. Moving arm; 3331. Connecting rod; 34. Limiting rod. Detailed Implementation

[0041] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0043] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0044] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0045] See attached document Figure 1As shown, the present invention provides a technical solution: an intelligent manhole cover, comprising a manhole cover body 10 and an early warning detection device 20. The early warning detection device 20 is disposed on the manhole cover body 10 and includes an environmental detection unit 21, a status detection unit 22, a communication module 23, a main control module 24, and a buzzer 25. The environmental detection unit 21, the status detection unit 22, the communication module 23, and the buzzer 25 are all electrically connected to the main control module 24. The communication module 23 is used to establish a communication connection with a modular data center. The environmental detection unit 21 includes a water level sensor 211 and a methane sensor 212. The water level sensor 211 is used to detect the methane levels in the manhole. The water level in the pipeline is monitored by a methane sensor 212, which detects the methane concentration in the underground pipeline. The status detection unit 22 includes a gyroscope sensor 221, which detects the tilt angle of the manhole cover body 10. The main control module 24 sends the water level, methane concentration, and tilt angle to the cloud server cluster via the communication module 23, and sends a control signal to the buzzer when it receives at least one of the abnormal water level, abnormal methane concentration, and abnormal tilt angle information fed back to the main control module 24 by the cloud server cluster via the communication module 23. The buzzer 25 sounds an alarm according to the control signal.

[0046] For example, the methane sensor 212, gyroscope sensor 221, and communication module 23 can all be located on the main control module 24. The water level sensor 211 can be an RB02S048, etc. The methane sensor 212 can be an MQ-4, etc. The gyroscope sensor 221 can be an ADXL345, etc. The communication module 23 can be an NB-IoT module or a GPRS module, etc.; the NB-IoT module can be an MN316, etc. The main control module 24 can be a microcontroller, etc.; the microcontroller can be an STM32F103C8T6, etc.

[0047] According to this embodiment:

[0048] Water level sensor 211 detects the water level in the underground pipeline and sends it to the main control module 24. The main control module 24 then transmits the water level information to the cloud server cluster via communication module 23 and modular data center. The cloud server cluster then determines whether the water level in the underground pipeline exceeds the safe water level threshold. When the water level exceeds the safe water level threshold, the cloud server cluster sends abnormal water level information back to the main control module 24 via the modular data center and communication module 23, causing the main control module 24 to activate a buzzer to warn passersby.

[0049] Methane sensor 212 detects the methane concentration in the underground pipeline and sends the data to the main control module 24. The main control module 24 then transmits the methane concentration data to the cloud server cluster via communication module 23 and modular data center. The cloud server cluster then determines whether the methane concentration in the underground pipeline exceeds the safe methane concentration threshold. When the methane concentration exceeds the safe methane concentration threshold, the cloud server cluster sends abnormal methane concentration information back to the main control module 24 via the modular data center and communication module 23, causing the main control module 24 to activate a buzzer to warn passersby.

[0050] The gyroscope sensor 221 detects the tilt angle of the manhole cover body 10 and sends it to the main control module 24. The main control module 24 then transmits the tilt angle of the manhole cover body 10 to the cloud server cluster via the communication module 23 and the modular data center. The cloud server cluster then determines whether the tilt angle of the manhole cover body 10 is greater than a preset tilt angle threshold. When the tilt angle of the manhole cover body 10 is greater than the preset tilt angle threshold, the cloud server cluster sends feedback of the tilt angle abnormality information to the main control module 24 via the modular data center and the communication module 23, causing the main control module 24 to control the buzzer to sound, thus warning passersby.

[0051] Thus, the environment of the underground pipeline is monitored by water level sensor 211 and methane sensor 212, and the status of the manhole cover body 10 is monitored by gyroscope sensor 221. When an abnormality occurs in the manhole cover body 10, on the one hand, a buzzer sounds to warn passersby and remind them to avoid the area, thereby minimizing the potential risks posed by the manhole cover body 10. On the other hand, the cloud server cluster can establish a communication connection with the staff's mobile terminals (e.g., mobile phones or computers), eliminating the need for staff to patrol the site, reducing their workload, and improving work efficiency; at the same time, it can provide detailed data support for municipal maintenance, notifying staff when abnormal data is detected by various sensors, enabling staff to formulate handling plans and go to the site in a timely manner.

[0052] See attached document Figure 1 As shown, in some embodiments, the state detection unit 22 includes an ultrasonic sensor 222, which is used to detect the displacement of the manhole cover body 10.

[0053] The main control module 24 is used to send the displacement to the cloud server cluster via the communication module 23 and to send a control signal to the buzzer when it receives the displacement abnormality information fed back to the main control module 24 by the cloud server cluster via the communication module 23.

[0054] For example, the ultrasonic sensor 222 may be mounted on the main control module 24.

[0055] According to this embodiment, the ultrasonic sensor 222 detects the displacement of the manhole cover body 10 and sends the data to the main control module 24. The main control module 24 then transmits the displacement of the manhole cover body 10 to the cloud server cluster via the communication module 23 and the modular data center. The cloud server cluster then determines whether the displacement of the manhole cover body 10 exceeds a preset displacement threshold. When the displacement exceeds the preset threshold, the cloud server cluster sends abnormal displacement information back to the main control module 24 via the modular data center and the communication module 23, causing the main control module 24 to activate a buzzer to warn pedestrians. Thus, by detecting the displacement of the manhole cover body 10 using the ultrasonic sensor 222, a buzzer can be activated to alert pedestrians to avoid the theft of the manhole cover body 10, thereby preventing pedestrians from falling into the manhole.

[0056] See attached document Figure 2 As shown, in some other embodiments, a high-speed digital signal processor 2221 and a filter 2222 are connected in series between the ultrasonic sensor 222 and the main control module 24.

[0057] For example, the high-speed digital signal processor 2221 and the filter 2222 can be located on the main control module 24. The high-speed digital signal processor 2221 can be a model such as TMS320LF2407APGEA. The filter 2222 can be a model such as TLF2-91SA.

[0058] According to this embodiment, some noise may be generated during the detection process of the ultrasonic sensor 222, which is not conducive to the main control module 24's analysis. Therefore, when the ultrasonic sensor 222 transmits data signals to the main control module 24, the high-speed digital signal processor 2221 extracts the noise in the data signal, and then filters out the noise through the filter 2222, thereby ensuring that the main control module 24 accurately analyzes the displacement.

[0059] See attached document Figure 1 As shown, in some embodiments, the environmental detection unit 21 includes a light intensity sensor 223, which is used to detect the light intensity of the underground pipeline.

[0060] The main control module 24 is used to send the light intensity to the cloud server cluster via the communication module 23 and to send a control signal to the buzzer when it receives abnormal light intensity information from the cloud server cluster via the communication module 23 to the main control module 24.

[0061] For example, the light intensity sensor 223 can be located on the main control module 24.

[0062] According to this embodiment, the light intensity sensor 223 detects the light intensity of the underground pipeline and sends it to the main control module 24. The main control module 24 then transmits the light intensity data of the underground pipeline to the cloud server cluster via the communication module 23 and the modular data center. The cloud server cluster then determines whether the light intensity of the underground pipeline exceeds a preset threshold. When the light intensity exceeds the preset threshold, the cloud server cluster sends abnormal light intensity information back to the main control module 24 via the modular data center and the communication module 23, causing the main control module 24 to activate a buzzer to warn pedestrians. Thus, by detecting the light intensity of the underground pipeline, when the light intensity exceeds the preset threshold, it can indicate that the manhole cover 10 is damaged or has been opened, or other factors. The buzzer alerts pedestrians to avoid the area, thereby reducing the occurrence of safety accidents.

[0063] See attached document Figure 1 As shown, in some embodiments, a positioning module 25 is included, which is electrically connected to the main control module 24. The positioning module 25 is used to obtain the position information of the manhole cover body 10.

[0064] For example, the positioning module 25 can be located on the main control module 24. The positioning module 25 can be a GPS positioning module 25 or a Beidou positioning module 25, etc.; for example, the model of the GPS positioning module 25 can be NEO6M, etc.

[0065] According to this embodiment, the positioning module 25 provides the cloud server cluster with the location information of the manhole cover body 10. When there is an abnormality in the manhole cover body 10 and the underground pipeline, it is convenient for staff to know the location of the abnormal manhole cover body 10 in a timely manner.

[0066] See attached document Figures 3-8 As shown, in some embodiments, a limiting mechanism 30 is included. The limiting mechanism 30 includes a housing 31, a drive motor 32, a transmission assembly 33, and limiting rods 34. The housing 31 is connected to the manhole cover body 10. The early warning detection device 20 is located on the side of the housing 31 away from the manhole cover body 10. The drive motor 32 and the transmission assembly 33 are both located inside the housing 31. The transmission assembly 33 is connected to the output end of the drive motor 32. There are multiple limiting rods 34. All the limiting rods 34 are arranged at intervals along the circumference of the housing 31. One end of each limiting rod 34 penetrates the side wall of the housing 31 and extends to connect with the transmission assembly 33.

[0067] According to this embodiment, the drive motor 32 provides power to the transmission assembly 33, which drives all the limiting rods 34 to move radially along the housing 31, thereby enabling all the limiting rods 34 to be in an open or closed state. When all the limiting rods 34 are in the open state, the other end of all the limiting rods 34 is inserted into the hole in the wall of the downhole pipeline. By limiting the manhole cover body 10 with all the limiting rods 34, it can prevent the manhole cover body 10 from being blown off when the water level or methane concentration is too high, and it can also prevent the manhole cover body 10 from being stolen.

[0068] See attached document Figures 3-8 As shown, in some embodiments, the transmission assembly 33 includes a support platform 331, a turntable 332, and a moving arm 333. The support platform 331 and the turntable 332 are arranged sequentially in the vertical direction. The support platform 331 is fixed to the top wall or side wall of the housing 31 by multiple fixing rods 3311. Multiple sliding channels 3312 are provided on the support platform 331. The number of sliding channels 3312 and the number of moving arms 333 are related to the number of limiting rods 34, and the sliding channels 3312 and the moving arms 333 are arranged in a one-to-one correspondence with the limiting rods 34. The sliding channel 3312 includes a sliding hole 33121, a first guide hole 33122, and a second guide hole 33123. The first guide hole 33122 and the second guide hole 33123 are connected to the sliding hole 33121. The first guide hole 33122 and the second guide hole 33123 are symmetrical about the defined central axis. The turntable 332 has an arc-shaped hole 341 for each sliding channel 3312. One end of the moving arm 333 is inserted into the sliding hole 33121, and a connecting rod 3331 is provided at one end of the moving arm 333 located in the sliding hole 33121. One end of the connecting rod 3331 passes through the first guide hole 33122 and is inserted into the guide hole. The other end of the connecting rod 3331 is inserted into the second guide hole 33123. One end of the limiting rod 34 is connected to the other end of the moving arm 333.

[0069] According to this embodiment, when the drive motor 32 drives the turntable 332 to rotate, the arc-shaped hole 341 generates a pushing or pulling force on the connecting rod 3331, causing the connecting rod 3331 to move within the arc-shaped hole 341. Simultaneously, the connecting rod 3331 drives the moving arm 333 to move along the sliding hole 33121, applying a pushing or pulling force to the limiting rod 34, thereby achieving an open or closed state for all the limiting rods 34. This ensures the stability of the movement of the limiting rods 34.

[0070] See attached document Figures 3-8 As shown, in some embodiments, the limiting mechanism 30 includes an arc-shaped reinforcing plate (not shown in the figure), the number of which is related to the number of connecting rods 3331, and the arc-shaped reinforcing plates are respectively disposed at the other end of the limiting rod 34.

[0071] According to this embodiment, when there are no holes in the wall of the underground pipeline, an arc-shaped reinforcing plate can be used to make close contact with the pipe wall, increasing the contact area. This provides stronger resistance to the pipe wall, ensuring that the manhole cover body 10 is not easily moved.

[0072] In some embodiments, a solar panel is provided on the manhole cover body 10, which is used to power the early warning detection device 20. The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart manhole cover, characterized in that, include: Manhole cover body (10); An early warning detection device (20) is installed on the main body (10) of the manhole cover. The early warning detection device (20) includes an environmental detection unit (21), a status detection unit (22), a communication module (23), a main control module (24), and a buzzer (25). The environmental detection unit (21), the status detection unit (22), the communication module (23), and the buzzer (25) are all electrically connected to the main control module (24). The communication module (23) is used to establish a communication connection with the cloud server cluster. The environmental detection unit (21) includes a water level sensor (211) and a methane sensor (212). The water level sensor (211) is used to detect the water level in the underground pipeline, and the methane sensor (212) is used to detect the methane concentration in the underground pipeline. The status detection unit (22) includes a gyroscope sensor (221), which is used to detect the tilt angle of the manhole cover body (10); the main control module (24) is used to send the water level, the methane concentration and the tilt angle to the cloud server cluster via the communication module (23), and to send a control signal to the buzzer when it receives at least one of the abnormal water level information, abnormal methane concentration information and abnormal tilt angle information fed back by the cloud server cluster to the main control module (24) via the communication module (23); The buzzer (25) is used to sound an alarm in accordance with the control signal.

2. The intelligent manhole cover according to claim 1, characterized in that, The status detection unit (22) includes an ultrasonic sensor (222), which is used to detect the displacement of the manhole cover body (10); The main control module (24) is used to send the displacement to the cloud server cluster via the communication module (23) and to send a control signal to the buzzer when it receives the displacement abnormality information fed back by the cloud server cluster to the main control module (24) via the communication module (23).

3. The intelligent manhole cover according to claim 2, characterized in that, A high-speed digital signal processor (2221) and a filter (2222) are connected in series between the ultrasonic sensor (222) and the main control module (24).

4. The intelligent manhole cover according to claim 1, characterized in that, The environmental detection unit (21) includes a light intensity sensor (223), which is used to detect the light intensity of the downhole pipeline; The main control module (24) is used to send the light intensity to the cloud server cluster via the communication module (23) and to send a control signal to the buzzer when it receives light intensity abnormality information fed back by the cloud server cluster to the main control module (24) via the communication module (23).

5. The intelligent manhole cover according to claim 1, characterized in that, It includes a positioning module (26), which is electrically connected to the main control module (24). The positioning module (24) is used to obtain the position information of the manhole cover body (10).

6. The intelligent manhole cover according to any one of claims 1 to 5, characterized in that, The device includes a limiting mechanism (30), which includes a housing (31), a drive motor (32), a transmission assembly (33), and limiting rods (34). The housing (31) is connected to the manhole cover body (10). The early warning detection device (20) is located on the side of the housing (31) away from the manhole cover body (10). The drive motor (32) and the transmission assembly (33) are both located inside the housing (31). The transmission assembly (33) is connected to the output end of the drive motor (32). There are multiple limiting rods (34). All the limiting rods (34) are arranged at intervals along the circumference of the housing (31). One end of each limiting rod (34) penetrates the side wall of the housing (31) and extends to connect with the transmission assembly (33).

7. The intelligent manhole cover according to claim 6, characterized in that, The transmission assembly (33) includes a support platform (331), a turntable (332), and a moving arm (333). The support platform (331) and the turntable (332) are arranged sequentially in the vertical direction. The support platform (331) is fixed to the top wall or side wall of the housing (31) by multiple fixing rods (3311). The support platform (331) has multiple sliding channels (3312). The number of sliding channels (3312) and the number of moving arms (333) are related to the number of limiting rods (34), and the sliding channels (3312) and the moving arms (333) are arranged in a one-to-one correspondence with the limiting rods (34). The sliding channel (3312) includes a sliding hole (33121), a first guide hole (33122), and a second guide hole (33123). The first guide hole (33122) is... The first guide hole (3122) and the second guide hole (33123) are connected to the sliding hole (33121). The first guide hole (33122) and the second guide hole (33123) are symmetrical about the defined central axis. The turntable (332) has an arc-shaped hole (341) for each of the sliding channels (3312). One end of the moving arm (333) is inserted into the sliding hole (33121), and the moving arm (333) is provided with a connecting rod (3331) at one end of the sliding hole (33121). One end of the connecting rod (3331) passes through the first guide hole (33122) and is inserted into the guide hole. The other end of the connecting rod (3331) is inserted into the second guide hole (33123). One end of the limiting rod (34) is connected to the other end of the moving arm (333).

8. The intelligent manhole cover according to claim 7, characterized in that, The limiting mechanism (30) includes arc-shaped reinforcing plates, the number of which is related to the number of connecting rods (3331), and the arc-shaped reinforcing plates are respectively disposed at the other end of the limiting rod (34).

9. The intelligent manhole cover according to claim 1, characterized in that, The manhole cover body (10) is equipped with a solar panel, which is used to power the early warning detection device (20).

Images