Detection and early warning system for intelligent manhole covers

Abstract

This invention belongs to the field of manhole cover early warning technology and discloses an intelligent manhole cover detection and early warning system. It includes a manhole cover base pre-embedded in the ground and a manhole cover body covering the base. A folding warning sign is provided on the inner side of the manhole cover base, initially folded under the pressure of the manhole cover body. The folding warning sign includes an elastic torsion member disposed in the manhole cover base, with a vertical pole connected to its end. A warning plate is mounted on the vertical pole. This invention works by having a position sensor send an electrical signal to a controller when the pressure of the manhole cover is lost. The controller then activates the circuit between the battery and a light strip. The light strip is a ring-shaped light strip installed on the top of the manhole cover, emitting a relatively obvious red alarm light. This allows the top outline of the manhole cover base to be clearly displayed even in low ambient light, providing a very clear warning effect and preventing pedestrians from falling into the manhole.

Description

Technical Field

[0001] This invention belongs to the field of manhole cover early warning technology, specifically a smart manhole cover detection and early warning system. Background Technology

[0002] As a crucial component of urban infrastructure, manhole covers have seen a continuous surge in number with urbanization, but this increase has also brought safety hazards. Existing manhole covers in sidewalks, parks, and other densely populated pedestrian areas are typically made of composite materials instead of cast iron due to lower load-bearing requirements. These composite materials are lighter, and under extreme weather conditions, water accumulation and pipe network suction can easily cause aging or poorly secured manhole covers to shift or fall off, creating hidden risks. Furthermore, the decomposition of organic matter underground and gas leaks can accumulate flammable gases such as methane, which could potentially explode upon contact with an open flame. These issues expose the shortcomings of traditional manhole cover management methods.

[0003] For example, the smart manhole cover disclosed in application number CN202010860982.7 includes a manhole body with a manhole opening at one end; a cover plate covering the manhole opening; and a first driving mechanism including a driving component, a first sleeve column, and a second sleeve column, which are vertically movable relative to each other. The upper end of the first sleeve column is connected to the cover plate, and the lower end of the second sleeve column is connected to the manhole body. The driving component includes a first magnetic component and a second magnetic component that are relatively attracted to each other, an elastic component compressed and connected between the first sleeve column and the second sleeve column, and an electromagnetic component for generating magnetic force when energized to release the magnetic attraction state of the first magnetic component and the second magnetic component. When the magnetic attraction state of the first magnetic component and the second magnetic component is released, the elastic component drives the second sleeve column to rise vertically, so that the cover plate opens the manhole opening.

[0004] While it can actively drain water by opening the manhole, it also has some drawbacks. Although it can control the size of the opening when draining water, it still poses certain safety hazards, and it lacks effective warning mechanisms. Furthermore, it uses locking pins to secure the manhole cover, which is not commonly used in current mainstream methods because the constant pressure on the manhole cover easily deforms the horizontally locking pins, making it difficult to open the cover during maintenance. Therefore, this application proposes an intelligent manhole cover detection and early warning system to overcome the above-mentioned shortcomings. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides an intelligent manhole cover detection and early warning system, which solves the shortcomings of existing manhole covers in lacking early warning for loss, water accumulation, and gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent manhole cover detection and early warning system, comprising a manhole cover base pre-embedded in the ground, and a manhole cover body covering the manhole cover base. A folding notice board is provided on the inner side of the manhole cover base, initially in a stacked state under pressure from the manhole cover body. The folding notice board includes an elastic torsion member disposed in the manhole cover base, with a vertical pole connected to the end of the elastic torsion member. A notice board is mounted on the vertical pole, and the notice board is elastically folded under pressure from the manhole cover body. An installation groove is provided on the top of the manhole cover base, and a light strip is disposed inside the installation groove. An annular cavity is provided in the manhole cover base, containing a battery that powers the light strip. A presence sensor is disposed on the inner wall of the manhole cover base; the presence sensor, when disconnected from the manhole cover base controller, illuminates the light strip.

[0007] Preferably, an iron hoop is also placed in the mounting groove, the light strip is located below the iron hoop, a light separation slit is reserved between the iron hoop and the mounting groove, and epoxy resin is poured into the light separation slit to encapsulate the light strip.

[0008] Preferably, the manhole cover body is provided with a ring of solar panels, and a stainless steel frame is mounted on top of the solar panels. The solar panels are used to charge the battery when the manhole cover body is normally closed on the manhole cover seat. The manhole cover body is provided with a moisture-proof socket that connects to the external plug of the battery.

[0009] Preferably, the groove edge of the well cover body for storing solar panels is provided with an air groove, and the annular cavity of the well cover seat is provided with an air chamber that communicates with the air groove, for periodically spraying high-speed jets onto the solar panels to blow away particulate dirt, and the well cover body is provided with an air filling device for replenishing air to the air chamber.

[0010] Preferably, the inflation device includes a top cap movably fitted inside the manhole cover body, and an air cylinder sitting on a fixed frame. A piston rod is fitted inside the air cylinder, with the top end of the piston rod abutting against the bottom end of the top cap, and the bottom end of the piston rod being pushed upward by an elastic element. The inner cavity of the air cylinder is controlled by two one-way valves to control the air inlet and outlet. An elastic bladder is provided in the air chamber, and the air cylinder is connected to the elastic bladder.

[0011] Preferably, the vent of the elastic bladder is connected to an vent connector located on a fixed frame via a solenoid valve. The vent connector is inserted into a tube at the bottom of the manhole cover body to supply air to the air groove of the manhole cover body. The air supply system consisting of the inflation device, air chamber, elastic bladder, solenoid valve and vent connector is provided in two sets, which are centrally symmetrical.

[0012] Preferably, the manhole cover body is a three-layer press-fit design, consisting of composite layer unit one, composite layer unit two, and composite layer unit three from top to bottom. Composite layer unit one has air passage one and air passage two. Air passage one surrounds the solar panel in the center and has evenly distributed inward-concentrated exhaust ports. Air passage two is surrounded by the solar panel in the center and has evenly distributed outward-dispersing exhaust ports. One-way valves are provided at the exhaust ports. Composite layer unit two and composite layer unit three have air grooves two and one respectively for connecting to two air supply systems and guiding to air passage two and air passage one.

[0013] Preferably, the manhole cover seat has a protrusion inside, and the bottom of the manhole cover body has a groove that can be coupled with it.

[0014] Preferably, the manhole cover seat is further provided with a gas sensor and a liquid level sensor located below the fixing frame, which are used to monitor the gas concentration and water level in the well. When the gas concentration and water level exceed the threshold, the light strip is lit.

[0015] Preferably, the controller is electrically connected to the solenoid valve to control the opening and closing of the solenoid valve, and a pressure sensor is provided in the elastic bladder and electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention determines the status of a manhole cover by the contact between a position sensor and the cover. When the cover detaches from the cover seat, the position sensor loses the pressure of the cover and sends an electrical signal to the controller. The controller then activates the circuit between the battery and the LED strip. The LED strip is a ring-shaped light strip installed on the top of the manhole cover, which emits a relatively obvious red alarm light. This allows the top outline of the cover seat to be clearly displayed even in low ambient light, providing a very obvious warning and effectively preventing the danger of falling.

[0018] This invention inflates the air chamber by having pedestrians or non-motorized vehicles repeatedly run over its surface. The top of the cap is spherical and slightly protrudes upwards; it can be pressed down by pedestrians or vehicles. A piston rod below the cap compresses the gas in the air cylinder, forcing it into an elastic bladder connected to it. After the pressure is released, the elastic element below lifts the piston rod upwards, pushing the cap out of the manhole cover surface again. This process is repeated until the elastic bladder is fully filled. Ultimately, the compressed gas in the elastic bladder forms a jet that blows away dust and small particles from the surface of the solar panel, keeping the solar panel clean.

[0019] The manhole cover of this invention forms internal air passages through the compression of various units, and the directions of these air passages are different. Air passage one blows from the outer edge to the inner side, while air passage two blows from the inner side to the outer edge, thus achieving a multi-angle blowing effect. Due to the randomness of pedestrian trampling and vehicle running over, the elastic bladders in the two airflow systems reach their thresholds at different times. Therefore, the jets of the two-way air passages are staggered in most cases, avoiding conflict between the two jets. This results in better cleaning of the solar panel surface and achieves thorough cleaning without dead angles, ensuring high light energy conversion efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external configuration of the present invention;

[0021] Figure 2 This is a bottom view of the interior and bottom of the manhole cover seat of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the manhole cover and manhole cover seat of the present invention;

[0023] Figure 4 This is a schematic diagram illustrating the separation of the manhole cover and the manhole cover seat according to the present invention;

[0024] Figure 5 This is a schematic diagram showing the disassembly of each unit of the manhole cover of the present invention;

[0025] Figure 6 This is a schematic diagram of the air passage of the manhole cover of the present invention;

[0026] Figure 7 This is a perspective view of the air passage of the manhole cover of the present invention;

[0027] Figure 8 This is a schematic diagram of the gas supply system of the present invention;

[0028] Figure 9 This is a schematic diagram of the manhole cover seat of the present invention awaiting disassembly;

[0029] Figure 10 This is a schematic diagram of the folded sign erected after the manhole cover is detached according to the present invention.

[0030] Figure 11 This is a schematic diagram illustrating the storage of the foldable notice board according to the present invention.

[0031] In the diagram: 100, manhole cover base; 101, LED strip; 102, air chamber; 103, elastic bladder; 104, mounting groove; 105, solenoid valve; 106, exhaust connector; 107, protrusion; 108, battery; 109, presence sensor; 200, manhole cover body; 201, composite layer unit one; 202, composite layer unit two; 203, composite layer unit three; 204, fixing frame; 205, stainless steel frame; 206, solar panel. 207. Gas plate; 208. Gas path one; 209. Gas channel two; 210. Gas channel one; 211. Card slot; 300. Inflator; 301. Top cap; 302. Elastic component; 303. Air cylinder; 304. Piston rod; 400. Folding notice board; 401. Elastic torsion component; 402. Upright pole; 403. Notice board; 500. Liquid level sensor; 600. Gas sensor; 700. Controller; 800. Battery. 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] First embodiment, such as Figure 1 , Figure 2 , Figures 9 to 11 As shown, this invention provides a smart manhole cover detection and early warning system, including a manhole cover seat 100 pre-embedded in the ground, and a manhole cover body 200 covering the manhole cover seat 100. A folding warning sign 400 is provided on the inner side of the manhole cover seat 100. The folding warning sign 400 is initially in a folded state under the pressure of the manhole cover body 200. The folding warning sign 400 includes an elastic torsion member 401 disposed in the manhole cover seat 100. An upright 402 is connected to the end of the elastic torsion member 401. A notice board 403 is installed on the manhole cover 2. The notice board 403 is in an elastic folded state when pressed by the manhole cover body 200. The top of the manhole cover seat 100 is provided with an installation groove 104. A light strip 101 is provided inside the installation groove 104. An annular cavity is provided in the manhole cover seat 100. The cavity includes a battery 800 that supplies power to the light strip 101. An in-situ sensor 109 is provided on the inner wall of the manhole cover seat 100. When the in-situ sensor 109 is removed from the manhole cover seat 100, the controller lights up the light strip 101.

[0034] In this embodiment, the pre-warning status is determined by the fit between the manhole cover and its base. When the manhole cover and base are properly fitted, the base 100 presses against the presence sensor 109, which detects the presence of the manhole cover, thus no light warning is triggered. At this time, the folded warning sign 400 is compressed by the base 100, lying horizontally within the base, and the sign 403 is also elastically folded and stored within the manhole cover body 200. When the manhole cover detaches from the base, the presence sensor 109 loses the pressure and sends a signal to the controller. The controller then activates the circuit between the battery and the LED strip 101. The LED strip 101 is a ring-shaped light strip positioned on the top of the manhole cover, emitting a noticeable red warning light. This allows the top outline of the base to be clearly displayed in low ambient light, outlining the location and area of ​​the danger zone, providing a very clear warning effect.

[0035] Furthermore, due to the removal of the manhole cover's pressure, the elastic torsion member 401 of the folding sign 400 will rotate the upright 402 upwards to a vertical position due to the torsion spring within it, and the sign 403 will unfold to reveal the warning message. The sign 403 uses luminous strips to outline the shape of the lettering, which can reflect nighttime light, allowing passersby to clearly see the warning and the missing manhole cover.

[0036] like Figure 9 As shown, a ring of iron hoops is also placed in the mounting groove 104, and the light strip 101 is located below the iron hoop. A light separation slit is reserved between the iron hoop and the mounting groove 104, and epoxy resin is poured into the light separation slit to encapsulate the light strip 101.

[0037] This iron clamp covers and protects the light strip 101, but a gap is left between the clamp and the outer edge of the mounting groove 104. This gap is filled with epoxy resin, which, after curing, encapsulates the light strip. The epoxy resin effectively prevents short circuits caused by moisture or mechanical impact in the external environment, serving as a crucial protective barrier. Furthermore, the epoxy resin itself provides diffuse reflection, resulting in bright and uniform light emitted from the gap, clearly visible to pedestrians from multiple angles.

[0038] like Figure 2 and Figure 4 As shown, a ring of solar panels 206 is arranged on the manhole cover body 200. A stainless steel frame 205 is mounted on top of the solar panels 206. When the manhole cover body 200 is normally covered on the manhole cover seat 100, the solar panels 206 are used to charge the battery 108. The manhole cover body 200 is provided with a moisture-proof socket that connects to the external plug of the battery 108.

[0039] A solar panel 206 is installed on top of the manhole cover body 200 for generating electricity under normal sunlight conditions. It is covered by another layer of solar panels 206 arranged in a ring. The solar panels 206 have a grid structure, which does not obstruct a large area of ​​the photovoltaic panels, allowing light to still penetrate well and reach the surface of the solar panels 206. A stainless steel frame 205 can prevent large particles, such as stones or roadside branches, from falling onto its surface. The bottom of the manhole cover body 200 has a connector for insertion into the battery 108 when the manhole cover seat 100 is properly closed, thus replenishing the battery 108 with power.

[0040] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the groove edge of the manhole cover body 200 for storing solar panels 206 is provided with an air groove. The annular cavity of the manhole cover seat 100 is provided with an air chamber 102 that communicates with the air groove. It is used to spray high-speed jets onto the surface of the solar panels 206 from time to time to blow away particulate dirt. An air filling device 300 is provided on the manhole cover body 200 to replenish air to the air chamber 102.

[0041] The stainless steel frame 205 can isolate large particles and debris such as branches and leaves from the outside, but it has no effect on dust and small particles. Manual cleaning is inconvenient, therefore it needs to have a self-cleaning function. The solar panel 206 in this application is a recessed installation, installed in an annular groove on the top of the manhole cover body 200. An air trough is also provided on the edge of the groove, which connects to the air chamber 102, guiding the compressed gas in the chamber 102 into the groove to form a high-speed jet that blows away small particles and dust from the solar panel 206. A valve is installed on the air trough to isolate the external environment in one direction; it is only opened when the internal airflow is ejected outwards. A guide groove can also be provided on the surface of the manhole cover body 200 to drain accumulated water outwards. This water can be discharged directly into the manhole or overflowed onto the roadside, depending on the specific needs.

[0042] Second embodiment, such as Figure 3 As shown, the inflation device 300 includes a top cap 301 movably fitted inside the manhole cover body 200, and an air cylinder 303 sitting on the fixed frame 204. A piston rod 304 is fitted in the air cylinder 303. The top end of the piston rod 304 abuts against the bottom end of the top cap 301, and the bottom end of the piston rod 304 is pushed upward by the elastic member 302.

[0043] The air cylinder 303 has two one-way valves controlling the air intake and exhaust. An elastic bladder 103 is installed in the air chamber 102, and the air cylinder 303 is connected to the elastic bladder 103.

[0044] The inflation device 300 is used to introduce air into the air chamber 102. Its main function is to inflate the air chamber 102 by repeatedly running over its surface with pedestrians or non-motorized vehicles. The top of the cap 301 is spherical and protrudes slightly upwards. It can be pressed down by pedestrians stepping on it, and the piston rod 304 below it compresses the gas in the air cylinder 303, pushing it into the elastic bladder 103 connected to it. After the pressure is released, the elastic element 302 below lifts the piston rod 304 upwards, pushing the cap 301 out of the surface of the manhole cover body 200 again. This process is repeated until the elastic bladder 103 is fully inflated.

[0045] The air cylinder 303 is equipped with two sets of one-way valves or check valves, which are connected to the downhole environment and the elastic bladder 103, respectively. When the piston rod 304 is lifted, the valve leading to the elastic bladder 103 closes while the valve leading to the external environment opens, allowing air to enter the air cylinder 303. When the piston rod 304 is pressed down, the valve leading to the elastic bladder 103 opens while the valve leading to the external environment closes, allowing air to be delivered to the elastic bladder 103. The above process corresponds to the two conditions of the top cap 301 being released and depressed.

[0046] Once the elastic bladder 103 is full of gas, it will automatically release the gas into the air groove in the manhole cover body 200 through the pipe valve, thereby achieving a continuous air blowing effect.

[0047] like Figure 4 and Figure 8 As shown, the exhaust port of the elastic bladder 103 is connected to an exhaust connector 106 located on the fixed frame 204 via a solenoid valve 105. The exhaust connector 106 is inserted into the insertion tube at the bottom of the manhole cover body 200 to supply air to the air groove of the manhole cover body 200. The air supply system consisting of the inflation device 300, air chamber 102, elastic bladder 103, solenoid valve 105 and exhaust connector 106 is provided in two sets, which are centrally symmetrical.

[0048] When the pressure in the elastic bladder 103 exceeds a threshold, the solenoid valve 105 is triggered to open. There are several triggering methods: it can be triggered by a barometer installed within it, or by a switch in the air chamber 102 being triggered by the expansion and contact of the elastic bladder 103. The air supply system has two or more sets, which can be used for higher-frequency cleaning or targeted air supply to different air paths, facilitating subsequent structural expansion. All of the above systems are located under the manhole cover seat 100, providing good protection, and are separate from the manhole cover seat 100; even if the manhole cover seat 100 is lost, the main body of the system will not be damaged.

[0049] The third embodiment, such as Figure 5 , Figure 6 and Figure 11As shown, the manhole cover body 200 is a three-layer press-fit design, consisting of composite layer unit 1 201, composite layer unit 202, and composite layer unit 3 203 from top to bottom. Composite layer unit 1 201 has air passage 1 207 and air passage 208. Air passage 1 207 surrounds the solar panel 206 in the center and has evenly distributed inward-concentrated exhaust ports. Air passage 2 208 is surrounded by the solar panel 206 in the center and has evenly distributed outward-dispersing exhaust ports. One-way valves are installed at the exhaust ports. Composite layer unit 202 and composite layer unit 3 203 have air groove 2 209 and air groove 1 210 respectively, which are used to connect with the two air supply systems and guide to air passage 2 208 and air passage 1 207.

[0050] In this embodiment, the manhole cover is made of three layers of composite material pressed together. Air passages are pre-formed into each of the three composite material units. The three units are then assembled and concealed internally, fixing the shape, preventing contamination, and preventing deformation. Each manhole cover unit only needs to have its air passage structure formed in a mold, which greatly improves production efficiency and effectively reduces costs compared to conventional pipeline installation. Furthermore, the main air passages are located on the top composite layer unit 201, while air grooves are provided on the main body composite layer units 202 and 203, thereby ensuring the strength of the manhole cover. Figure 6 The air trough 210 in the middle can also be set on the composite layer unit 202. Figure 6 The setup requires sealing the air ducts on its surface with strip baffles.

[0051] Gas trough 209 and gas trough 1 210 are respectively connected to various gas supply systems through air guide columns installed under the manhole cover.

[0052] like Figure 4 and Figure 6 As shown, the manhole cover seat 100 has a protrusion 107 inside, and the bottom of the manhole cover body 200 has a slot 211 that can be coupled with it.

[0053] The protrusion 107 and the slot 211 are precisely coupled, and vertical installation can accurately connect to various air and electrical interfaces.

[0054] like Figure 2 As shown, the manhole cover base 100 is also equipped with a 900, and a gas sensor 600 and a liquid level sensor 500 are installed under the fixing frame 204 to monitor the gas concentration and water level in the well. When the gas concentration and water level exceed the threshold, the light strip 101 is lit.

[0055] The manhole cover body 200 is equipped with a level gauge 500 and a gas sensor 600 to detect the water level and gas concentration in the manhole, respectively. When the threshold is exceeded, the external light strip 101 will also be activated to light up and issue an alarm, reminding pedestrians to stay away or the municipal inspection department to carry out maintenance. A wireless communication system can also be added, which can actively notify the municipal department to conduct a safety inspection after the alarm is triggered.

[0056] like Figure 2 As shown, the controller 700 is electrically connected to the solenoid valve 105 to control the opening and closing of the solenoid valve 105, and a pressure sensor is provided in the elastic bladder 103 and electrically connected to the controller 700.

[0057] Working principle and usage process of this invention:

[0058] When the manhole cover and its base are properly engaged, the base 100 presses against the presence sensor 109, which detects the presence of the manhole cover and therefore does not trigger a light warning. At this time, the folding warning sign 400 is compressed by the base 100, lying horizontally within the base, and the sign 403 is also elastically folded and stored within the manhole cover body 200. When the manhole cover detaches from the base, the presence sensor 109 loses pressure and sends a signal to the controller. The controller then activates the circuit between the battery and the LED strip 101. The LED strip 101 is a ring-shaped light strip positioned on the top of the manhole cover, emitting a clearly visible red warning light. This allows the top outline of the manhole cover base to be clearly displayed in low-light conditions, outlining the location and area of ​​the danger zone and providing a very clear warning. The manhole cover body 200 is equipped with a level gauge 500 and a gas sensor 600 to detect the water level and gas concentration in the manhole, respectively. When the threshold is exceeded, the external light strip 101 will also be controlled to illuminate and issue an alarm, which is used to remind passers-by to stay away or for municipal inspection departments to carry out maintenance. The inflation device 300 can replenish the elastic bladder 103 with compressed gas. When the internal air pressure reaches the release condition, the airflow is formed into a jet and blown onto the surface of the photovoltaic panel through the internal air passage of the manhole cover, thereby cleaning the photovoltaic panel and ensuring the photovoltaic panel's light energy conversion efficiency.

[0059] 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.

[0060] 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 smart manhole cover detection and early warning system, comprising a manhole cover base (100) pre-embedded in the ground, characterized in that: It also includes a manhole cover body (200) that is covered on a manhole cover seat (100), and a folding notice board (400) is provided on the inner side of the manhole cover seat (100). The folding notice board (400) is initially in a stacked state when pressed by the manhole cover body (200). The folding notice board (400) includes an elastic torsion member (401) disposed in the manhole cover seat (100), and an upright (402) is connected to the end of the elastic torsion member (401). A notice board (403) is installed on the upright (402), and the notice board (403) is in an elastic folded state when pressed by the manhole cover body (200). The top of the manhole cover seat (100) is provided with an installation groove (104), and a light strip (101) is provided inside the installation groove (104). The manhole cover seat (100) is provided with an annular cavity, which includes a battery (800) that supplies power to the light strip (101). The inner wall of the manhole cover seat (100) is provided with a presence sensor (109). When the presence sensor (109) is disconnected from the manhole cover seat (100), the controller illuminates the light strip (101).

2. The intelligent manhole cover detection and early warning system according to claim 1, characterized in that: A ring of iron hoops is also placed in the mounting groove (104), and the light strip (101) is located below the iron hoop. A light separation gap is reserved between the iron hoop and the mounting groove (104), and epoxy resin is injected into the light separation gap to encapsulate the light strip (101).

3. The intelligent manhole cover detection and early warning system according to claim 1, characterized in that: A ring of solar panels (206) is arranged on the manhole cover body (200), and a stainless steel frame (205) is mounted on top of the solar panels (206). The solar panels (206) are used to charge the battery (108) when the manhole cover body (200) is normally covered on the manhole cover seat (100). The manhole cover body (200) is provided with a moisture-proof socket that connects to the external plug of the battery (108).

4. The intelligent manhole cover detection and early warning system according to claim 3, characterized in that: The manhole cover body (200) has an air groove on the edge of the groove for storing the solar panel (206). The manhole cover seat (100) has an air chamber (102) inside the annular cavity that is connected to the air groove. The air chamber is used to spray a high-speed jet onto the solar panel (206) from time to time to blow away particulate dirt. The manhole cover body (200) is equipped with an air filling device (300) to replenish the air chamber (102).

5. The intelligent manhole cover detection and early warning system according to claim 4, characterized in that: The inflation device (300) includes a top cap (301) movably fitted inside the manhole cover body (200), and an air cylinder (303) sitting on a fixed frame (204). A piston rod (304) is fitted inside the air cylinder (303). The top end of the piston rod (304) abuts against the bottom end of the top cap (301), and the bottom end of the piston rod (304) is pushed upward by an elastic element (302). The air cylinder (303) has two one-way valves controlling the air intake and exhaust. An elastic bladder (103) is provided in the air chamber (102). The air cylinder (303) is connected to the elastic bladder (103).

6. The intelligent manhole cover detection and early warning system according to claim 5, characterized in that: The vent of the elastic bladder (103) is connected to an vent connector (106) located on the fixed frame (204) via a solenoid valve (105). The vent connector (106) is inserted into the insertion tube at the bottom of the manhole cover body (200) to supply air to the air groove of the manhole cover body (200). The air supply system consisting of the inflation device (300), air chamber (102), elastic bladder (103), solenoid valve (105) and vent connector (106) is provided in two sets, which are centrally symmetrical.

7. The intelligent manhole cover detection and early warning system according to any one of claims 4-6, characterized in that: The manhole cover body (200) is a three-layer press-fit design, consisting of composite layer unit one (201), composite layer unit two (202) and composite layer unit three (203) from top to bottom. The composite layer unit one (201) is provided with air passage one (207) and air passage two (208). The air passage one (207) surrounds the solar panel (206) in the center and is evenly distributed with inwardly concentrated exhaust ports. The air passage two (208) is surrounded by the solar panel (206) in the center and is evenly distributed with outwardly diverging exhaust ports. A one-way valve is provided at the exhaust port; The composite layer unit 2 (202) and composite layer unit 3 (203) are respectively provided with air groove 2 (209) and air groove 1 (210) for connecting with two air supply systems and guiding to air passage 2 (208) and air passage 1 (207).

8. The intelligent manhole cover detection and early warning system according to claim 7, characterized in that: The manhole cover seat (100) has a protrusion (107) inside, and the bottom of the manhole cover body (200) has a slot (211) that can be coupled with it.

9. The intelligent manhole cover detection and early warning system according to any one of claims 1-6, characterized in that: The well cover seat (100) is also equipped with (900), and a gas sensor (600) and a liquid level sensor (500) are installed under the fixing frame (204) to monitor the gas concentration and water level in the well. When the gas concentration and water level exceed the threshold, the light strip (101) is lit.

10. The intelligent manhole cover detection and early warning system according to claim 9, characterized in that: The controller (700) is electrically connected to the solenoid valve (105) for controlling the opening and closing of the solenoid valve (105). A pressure sensor is provided in the elastic bladder (103) and electrically connected to the controller (700).

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