Intelligent monitoring well lid in settlement state

Abstract

This utility model discloses an intelligent monitoring manhole cover for settlement, comprising a manhole cover body, a warning element within the manhole cover body, a rotating shaft within the manhole cover body, an actuating element fixed to the side of the rotating shaft, an end of the actuating element extending outward away from the rotating shaft, and a transmission element hinged to the top of the rotating shaft. The manhole cover body has an opening and a sealing element for closing the opening; the end of the sealing element away from the opening is hinged to the end of the transmission element away from the rotating shaft. A support element is also fixed within the manhole cover body, with an extension element inside and a telescopic spring sleeved on the outside. The warning element is fixed to the upper end of the extension element and abuts against the sealing element. This utility model connects the relatively stationary manhole cover groove and the movable manhole cover body through the actuating element, utilizing the difference in settlement displacement between the two to automatically trigger a mechanism. No power supply or sensors are required; when the manhole cover settles, a highly visible warning element immediately pops up, preventing pedestrians from falling, vehicles from bumping, or tires from bursting.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, and in particular to a smart manhole cover for monitoring settlement status. Background Technology

[0002] The intelligent settlement monitoring manhole cover is an intelligent product designed to address the problem of easy settlement of traditional manhole covers.

[0003] Through its built-in purely mechanical sensing and display mechanism, it can detect the subsidence of the manhole cover itself or the surrounding road surface in real time without electricity, and display the subsidence status intuitively through a conspicuous mechanical structure, thus serving as an early warning system.

[0004] However, existing intelligent settlement monitoring manhole covers only serve as a warning through conspicuous mechanical mechanisms, such as reflective strips. These warning measures decrease as the manhole cover descends in height. In dim lighting conditions, such as rain, the manhole covers only become effective when they are illuminated by vehicle headlights or when they are visible to the naked eye. By this time, vehicles or pedestrians are already quite close to the manhole cover, making it easy for them to notice the abnormality but not be able to avoid it in time. Therefore, existing intelligent settlement monitoring manhole covers are not sufficiently warning and have low safety when abnormal settlement occurs. Utility Model Content

[0005] The purpose of this invention is to provide a smart manhole cover for monitoring settlement status in order to solve the above-mentioned problems.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model provides an intelligent settlement monitoring manhole cover, including a manhole cover body, a warning element inside the manhole cover body, a rotating shaft rotatably disposed inside the manhole cover body, an actuating element fixedly disposed on the side of the rotating shaft, an end of the actuating element away from the rotating shaft extending outward and fixedly connected to an external manhole cover groove, a transmission element hinged to the top of the rotating shaft, a through opening in the manhole cover body, and a slidable sealing element for closing the through opening, the end of the sealing element away from the through opening being hinged to the end of the transmission element away from the rotating shaft, a support element fixedly disposed inside the manhole cover body, an extension element retractably disposed inside the support element, and a telescopic spring sleeved on the outside for lifting the extension element, the warning element being fixed to the upper end of the extension element and abutting against the sealing element.

[0008] In one embodiment, the actuating element is a rigid connecting rod or a bent metal sheet, one end of which is fixed to the side of the rotating shaft by a detachable fastener or by welding, and the other end is fixed to the side wall of the external manhole cover groove by an anchor bolt or flange.

[0009] In one embodiment, the transmission component is a rigid swing arm, one end of which is hinged to the top eccentric position of the rotating shaft via a pin, and the other end is hinged to the sealing component via a ball joint.

[0010] In one embodiment, the closure is a plate-shaped slide with guide ridges on both sides, and the sidewall of the opening is provided with a groove that matches the guide ridges.

[0011] In one embodiment, the telescopic spring is a pre-compressed helical spring, whose initial compression force is greater than the weight of the linkage system of the closure, transmission component and rotating shaft, so as to maintain the closure of the opening by the closure in a non-settling state.

[0012] In one embodiment, the warning element is a metal rod with a highly reflective coating on its top.

[0013] In one embodiment, the two ends of the rotating shaft are mounted in the manhole cover body by rolling bearings, and a waterproof sealing ring is provided between the rotating shaft and the mounting hole.

[0014] In one embodiment, the telescopic spring is externally covered with a dustproof corrugated tube cover.

[0015] The advantages or beneficial effects of the above technical solutions include at least the following:

[0016] In this invention, a relatively stationary manhole cover groove and a movable manhole cover body are connected by a starting component. The mechanism is automatically triggered by the difference in settlement displacement between the two, without the need for power supply or sensors. The warning component achieves physical warning through a mechanical pop-up structure, without the reliance on electronic components. It is adaptable to harsh environments such as rain, snow, high temperature, and humidity. The preload of the telescopic spring ensures that the warning component pops up at high speed and remains in a high position. Even if it is slightly covered by mud, it can still break through. Therefore, when the manhole cover settles, a highly visible warning component can pop up immediately to prevent pedestrians from falling, vehicles from bumping, or tires from bursting. Attached Figure Description

[0017] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0018] Figure 1 This is a three-dimensional structural diagram of the manhole cover body when the warning element extends.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the manhole cover body when the warning element is extended, according to this utility model.

[0020] Figure 3 for Figure 2Enlarged schematic diagram of the structure of section A in the middle.

[0021] Figure 4 This is a three-dimensional structural diagram of the manhole cover body when the warning element is not extended, according to this utility model.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the manhole cover body when the warning element is not extended, according to this utility model.

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of section B in the middle.

[0024] Attached reference numerals: 1. Manhole cover body; 2. Warning element; 3. Rotating shaft; 4. Starting element; 5. Transmission element; 6. Opening; 7. Sealing element; 8. Support element; 9. Extension element; 10. Telescopic spring; 11. Waterproof sealing ring; 12. Dustproof corrugated pipe cover. Detailed Implementation

[0025] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0028] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0030] Reference Figures 1-6 A smart settlement monitoring manhole cover includes a manhole cover body 1, a warning element 2 inside the manhole cover body 1, a rotating shaft 3 rotatably mounted inside the manhole cover body 1, an actuating element 4 fixedly mounted on the side of the rotating shaft 3, the end of the actuating element 4 away from the rotating shaft 3 extending outward and fixedly connected to an external manhole cover groove, a transmission element 5 hinged to the top of the rotating shaft 3, an opening 6 in the manhole cover body 1, and a slidable closing element 7 for closing the opening 6, the closing element 7 being located away from the opening. One end of 6 is hinged to the end of the transmission component 5 away from the rotating shaft 3. A support component 8 is fixedly installed inside the manhole cover body 1. An extension component 9 is telescopically installed inside the support component 8, and a telescopic spring 10 is sleeved on the outside to lift the extension component 9. The warning component 2 is fixed to the upper end of the extension component and abuts against the sealing component 7. With this configuration, when the area covered by the manhole cover body 1 settles, while the manhole cover trough does not settle or settles only slightly, a relative displacement difference will occur between the two in the vertical direction. That is, the manhole cover body 1 moves downward relative to the external manhole cover groove. As the manhole cover body 1 settles and moves downward, while the connection point between the starting component 4 and the outside remains unchanged, the starting component 4 generates a downward pulling force or drag on the rotating shaft 3, causing the rotating shaft 3 to rotate around its axis. When the rotating shaft 3 rotates, it drives the transmission component 5 to swing. At this time, the transmission component 5 drives the sealing component 7 to slide through the hinge point, so the sealing component 7 will leave the original position of the closed opening 6, thus presenting the state of the open opening 6. In the non-settled state, the extension component 9 is pressed down, and at this time the telescopic spring 10 is in a compressed state. This state is maintained by the blocking of the warning component 2 and the extension component 9 by the sealing component 7. Therefore, when the opening 6 is opened, the originally compressed telescopic spring 10 releases its elastic force instantly, pushing the extension component 9 upward. The extension component 9 extends upward along the support component 8, driving the warning component 2 fixed at its upper end to extend out from the opening 6, and finally protruding from the upper surface of the manhole cover body 1, forming a clearly visible warning sign.

[0031] The pop-up warning device 2 rises from the surface of the manhole cover, creating a very noticeable visual effect. Whether it is day or night, pedestrians, drivers, or maintenance personnel can immediately identify that there is a problem with the manhole cover, enabling them to avoid it in time and report the issue. This avoids the risk of the problem going undetected due to insignificant settlement.

[0032] In the above-mentioned structural components, the entire sensing, judgment, and execution mechanism is composed entirely of mechanical parts, which is not afraid of harsh conditions commonly found in wells or on the road, such as moisture, dust, rainwater, and oil. The structure is relatively simple with few failure points. Once triggered, it will continuously warn until reset. Resetting usually only requires lifting the manhole cover body 1 or manually pressing down the warning piece 2. Moreover, the kinetic energy for triggering and popping comes from the settlement displacement itself and the pre-stored spring potential energy, without the need for batteries or circuits. At the same time, when not settling, the warning piece 2 is pressed down by the sealing piece 7 and hidden inside the manhole cover body 1 and the support piece 8, avoiding damage from external impacts, crushing, or theft, and also maintaining the flatness and clean appearance of the road surface.

[0033] Reference Figure 3 and Figure 6 The starting component 4 is a rigid connecting rod or a bent metal sheet. One end of the rod is fixed to the side of the rotating shaft 3 by a detachable fastener or welding, and the other end is fixed to the side wall of the external manhole cover groove by an anchor bolt or flange. With this configuration, the rigid connecting rod can transmit force and displacement most directly and accurately. When the manhole cover body 1 settles, the rigid connecting rod is stretched axially, generating a linear tensile force. This tensile force acts directly on the fixed point of the rotating shaft 3 without any buffering or loss, causing the rotating shaft 3 to rotate, resulting in the highest motion transmission efficiency. The bent metal sheet has a rigidity in a specific direction and can be flexibly arranged in three-dimensional space to avoid obstacles inside the manhole cover. When settlement occurs, the tensile force is mainly transmitted to the rotating shaft 3 through the rigid deformation of the metal sheet itself, which is more flexible and adaptable to complex installation spaces. Both structures can ensure that the settlement displacement can be almost completely converted into the effective torsional force of the rotating shaft 3, avoiding trigger failure or reduced sensitivity caused by the bending or deformation of the starting component 4 itself.

[0034] In one specific embodiment, the detachable fasteners include, but are not limited to, bolts and pins. They have pre-set connection holes on the side of the rotating shaft 3, and one end of the starter 4 is firmly connected by bolts, nuts or pins. This makes installation, disassembly, adjustment or later maintenance and replacement convenient. For example, during maintenance, the bolts can be loosened to remove the starter 4, avoiding the need to disassemble the entire manhole cover body 1. Welding is done by directly welding the starter 4 to a designated position on the side of the rotating shaft 3. The advantage is that the connection strength is the highest and most reliable, and there is no risk of loosening.

[0035] In one specific embodiment, the anchoring bolts are made by drilling holes in the side wall of the manhole cover groove and embedding anchor bolts, including but not limited to chemical anchor bolts and expansion bolts. Then, the other end of the starting component 4 is fixed to the anchor bolt by bolts, which can provide a stable mechanical anchoring and firmly "tie" the starting component 4 to the relatively fixed manhole cover groove structure. The flange is a prefabricated flange connected to one end of the starting component 4. The corresponding perforated flange or mounting plate is pre-embedded or welded in the side wall of the manhole cover groove, and then the two flanges are connected and fastened by flange bolts. Compared with single-point anchoring, the flange connection has a larger contact area, more uniform force distribution, and a more stable and reliable connection.

[0036] Reference Figure 3 and Figure 6 The transmission component 5 is a rigid swing arm, which will not easily bend or deform under load. It primarily rotates as a whole, allowing the torque applied by the rotating shaft 3 to be transmitted to the other end of the swing arm with almost no loss, transforming it into a larger force that drives the sliding of the sealing component 7. One end of the sealing component 7 is hinged to the top of the rotating shaft 3 at an eccentric position via a pin. The pin allows the swing arm to rotate relative to the rotating shaft 3 only around its axis. Furthermore, the pin's mounting point is not on the central axis of the rotating shaft 3, but offset by a certain distance. When the rotating shaft 3 rotates, this point will perform a circular motion around the center of the rotating shaft 3. Because the swing arm is rigid and connected to this point of circular motion via the pin, every rotation of the rotating shaft 3 forces the swing arm to produce a corresponding, amplified force. The larger the eccentricity, the greater the swing displacement at the end of the swing arm under the same rotation angle of the shaft 3. This is the key mechanism for converting a small rotation angle into a larger swing displacement. The other end of the transmission component 5 is hinged to the closing component 7 through a ball joint. The ball joint is a universal connection structure with multiple degrees of freedom. Its ball joint allows free rotation and slight yaw within a certain angle range, which can perfectly compensate for the geometric mismatch between the swing end trajectory of the swing arm and the ideal sliding trajectory of the closing component 7. At the same time, even if the closing component 7 is subjected to a small lateral force or resistance during the sliding process, the adaptive rotation of the ball joint can maintain the smooth transmission of force, effectively preventing jamming or additional friction loss caused by deviation of the motion trajectory, and ensuring reliable operation.

[0037] During the above operation, the rigid swing arm ensures the lossless transfer of rotational energy. The eccentric hinge cleverly utilizes the lever principle to efficiently amplify the small-angle rotation of the pivot 3 into a large swing displacement at the end of the swing arm. This makes even a small rotation of the pivot 3 caused by a small settlement sufficient to drive subsequent actions, improving the system's sensitivity and enabling efficient conversion from a small rotation angle of the pivot 3 to a medium-displacement swing to a sliding displacement of the closure 7. Furthermore, the rigid structure and precise control of the motion trajectory ensure strong repeatability of each triggered action.

[0038] Reference Figure 3 and Figure 6The sealing element 7 is a plate-mounted sliding plate. The large plate surface can completely cover and seal the opening 6, preventing mud, rainwater, pests, etc. from entering the manhole cover body 1 when not triggered, thus protecting its internal structure. The plate structure distributes the force more evenly. In the non-settled state, when a load is applied to the manhole cover, the sealing element 7 can withstand part of the downward pressure and transfer it to the structure of the manhole cover body 1, avoiding the pressure from acting directly on the relatively fragile transmission mechanism or spring inside, thus improving the overall strength and lifespan of the structure. The sealing element 7 has guide ridges on both sides, and the side wall of the opening 6 has a sliding groove that matches the guide ridges. With this setting, the guide ridges are embedded in the corresponding sliding grooves, and the sliding grooves strictly constrain the ridges to slide only in a predetermined direction. This ensures that the sealing element 7 maintains a precise linear motion trajectory during reciprocating sliding, without deviation, shaking, or rotation.

[0039] In one specific embodiment, the contact surface between the protrusion and the groove is usually processed, and a solid lubricant or an oil reservoir can be added to the contact surface to reduce sliding friction resistance, making the operation smoother and less strenuous. The matching design of the cross-sectional shape of the protrusion and the groove optimizes the contact stress distribution and reduces the risk of local wear.

[0040] In one specific embodiment, during the sliding process, the edge or specific design of the plate-mounted sliding plate may scrape or push away foreign objects accumulated near the inlet of the chute, thus having a certain anti-sludge capability. The bottom of the chute is usually designed with small water guide holes or downward slots to allow water and fine mud entering the chute to be discharged in time, preventing long-term water accumulation from freezing or mud accumulation and jamming.

[0041] Reference Figure 3 and Figure 6The telescopic spring 10 is a pre-compressed helical spring. Pre-compression means that the telescopic spring 10 is already under compression when it is installed on the equipment, so that its length is less than its free length in order to store potential energy. Its initial compression force is greater than the weight of the linkage system of the closure 7, the transmission component 5, and the rotating shaft 3. In the non-sinking state, the closure 7 maintains the closed state of the opening 6. With this setting, in the non-sinking state, the starting component 4 is not subjected to the downward pull of sinking, the rotating shaft 3 has no tendency to rotate, and the linkage system has a tendency to move downward due to its own weight. However, the pre-compressed spring pushes the closure 7 upward through the extension 9. This means that the upward force applied by the telescopic spring 10 not only completely cancels the self-weight of the linkage system, but also generates an additional downward force. The force applied to the closure 7 presses it more firmly against the edge of the opening 6 and the bottom of the groove, ensuring that the opening 6 is reliably closed. At the same time, it also pre-tightens the entire linkage system, eliminating transmission chain gaps. When settling occurs, the starting component 4 pulls down the rotating shaft 3 → the rotating shaft 3 rotates → the swing arm swings → pulling the closure 7 to overcome friction and begin to slide open the opening 6. Once the closure 7 slides to a certain position and no longer presses on the warning component 2, it releases the pressure on the telescopic spring 10. At this time, the unconstrained telescopic spring 10 immediately uses its pre-compressed stored huge elastic potential energy to drive the extension component 9 to eject the warning component 2 at high speed. The spring force is then used to overcome the weight of the extension component 9 and the warning component 2 themselves, the frictional resistance of the sliding sleeve, and the air resistance to achieve ejection.

[0042] During the above operation, the core function of the pre-compression force being greater than the gravity of the linkage system is to powerfully and reliably lock the closure 7 in the closed position of the opening 6. This effectively avoids the following problems that may occur if the closure relies solely on the weight of the component: incomplete sealing: vehicle running over, strong winds, or slight vibrations may cause the closure 7, which relies solely on its own weight, to bounce slightly or shift, damaging the seal; premature partial opening: relying solely on its own weight, slight external forces may cause the linkage system to shift slightly downwards, causing the closure 7 to loosen or even accidentally open a small gap; system play: gravity may not be sufficient to eliminate all the play in the transmission chain, resulting in a "loose feeling" in the system. The pre-compression spring completely eliminates these plays.

[0043] When the entire linkage system is not settling, it is in a state of being "pressed" by the spring. Only when the settling occurs and the pulling force is sufficient to overcome the friction of the sealing component 7, the downward component of the spring preload, and the friction between the components can the mechanism be activated. This greatly increases the trigger threshold and avoids false activation or "false pop-ups" caused by normal slight vibrations of the road, strong winds, or thermal expansion and contraction of components. This is a key mechanism to ensure that the warning is only displayed when actual settling occurs.

[0044] The pre-compression state means that the spring initially stores a large amount of energy beyond what is required for the pop-up warning element 2. This allows the spring to release a huge amount of energy instantly after the compression is released, and the warning element 2 can quickly and powerfully pop up to the predetermined height, ensuring that the warning is conspicuous, timely, and clearly visible. The strong elasticity also allows the warning element 2 to effectively push away any small amount of mud or snow that may be covering the opening 6. The sufficiently large elasticity ensures that the warning element 2 can rise to the design limit position and can be reliably locked in the pop-up state.

[0045] In one specific embodiment, the warning element 2 is a metal rod with a high-reflectivity reflective coating on its top. This design provides the metal material with extremely high mechanical strength, allowing it to withstand the enormous pop-out impact of the telescopic spring 10 without deformation or breakage, or accidental minor collisions or scratches. The rod-like structure has excellent bending resistance, ensuring that it maintains a vertical or near-vertical preset posture after popping out, preventing easy bending that would reduce the warning effect. When light shines on the coating, the microprism / glass microbead structure concentrates and efficiently reflects the light back to the light source, a characteristic most crucial at night or in low-light conditions. When the car headlights shine on the reflective coating, it produces an extremely bright and conspicuous reflection, allowing the driver to clearly see a warning sign erected at the manhole cover from a great distance, thus providing sufficient time to slow down or drive around it.

[0046] In one specific embodiment, the high-reflectivity reflective coating is a professional-grade engineering reflective material containing countless tiny transparent prisms. These prisms can reflect incident light back along its original path with extremely high efficiency and precision, returning it to the direction of the light source. After the light enters the microspheres or prisms, total internal reflection occurs, minimizing light loss. The microspheres or prisms have a high refractive index, further increasing the brightness and angular range of the reflection.

[0047] Reference Figure 3 and Figure 6 The two ends of the rotating shaft 3 are installed inside the manhole cover body 1 through rolling bearings, and a waterproof sealing ring 11 is provided between the rotating shaft 3 and the mounting hole. With this setting, the rolling bearing can greatly reduce the frictional resistance, so that the starting component 4 only needs a small settlement displacement difference to drive the rotating shaft 3 to start rotating, which significantly improves the sensitivity of the system. Under the action of the spring clamping force, the waterproof sealing ring 11 is tightly attached to the surface of the rotating shaft 3 to form a dynamic seal, which physically isolates the contact channel between the harsh external environment of the manhole cover and the precision internal structure of the manhole cover. At the same time, it effectively prevents water from entering and causing corrosion of the rolling bearing, and prevents abrasive from entering the bearing raceway and causing abrasive, which greatly extends the service life of the bearing and the entire rotating mechanism.

[0048] Reference Figure 3 and Figure 6The telescopic spring 10 is covered with a dustproof corrugated tube cover 12. This design can minimize the entry of dust and other debris into the gaps of the telescopic spring 10, which could cause it to become unbalanced due to dust blockage when compressed.

[0049] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A smart settlement monitoring manhole cover, comprising a manhole cover body (1), wherein a warning element (2) is provided inside the manhole cover body (1), characterized in that: The manhole cover body (1) is rotatably provided with a rotating shaft (3). A starting component (4) is fixedly provided on the side of the rotating shaft (3). The end of the starting component (4) away from the rotating shaft (3) extends outward and is fixedly connected to the manhole cover groove outside. A transmission component (5) is also hinged to the top of the rotating shaft (3). The manhole cover body (1) has an opening (6) and a sealing component (7) for closing the opening (6) is slidably provided. The end of the sealing component (7) away from the opening (6) is hinged to the end of the transmission component (5) away from the rotating shaft (3). A support component (8) is also fixedly provided inside the manhole cover body (1). An extension component (9) is provided telescopically inside the support component (8), and a telescopic spring (10) for lifting the extension component (9) is sleeved on the outside. The warning component (2) is fixed to the upper end of the extension component (9) and abuts against the sealing component (7).

2. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The starting component (4) is a rigid connecting rod or a bent metal sheet. One end of the rod is fixed to the side of the rotating shaft (3) by a detachable fastener or by welding, and the other end is fixed to the side wall of the external manhole cover groove by an anchor bolt or flange.

3. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The transmission component (5) is a rigid swing arm, one end of which is hinged to the top eccentric position of the rotating shaft (3) by a pin, and the other end is hinged to the closing component (7) by a ball joint.

4. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The closure (7) is a plate-shaped slide with guide ridges on both sides, and the side wall of the opening (6) is provided with a slide groove that matches the guide ridges.

5. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The telescopic spring (10) is a pre-compressed helical spring, whose initial compression force is greater than the weight of the linkage system of the closure (7), transmission (5) and rotating shaft (3), and maintains the closure of the closure (7) to the opening (6) in a non-settling state.

6. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The warning component (2) is a metal rod with a high reflective coating on the top.

7. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The two ends of the rotating shaft (3) are installed inside the manhole cover body (1) through rolling bearings, and a waterproof sealing ring (11) is provided between the rotating shaft (3) and the installation hole.

8. The intelligent settlement monitoring manhole cover according to claim 1, characterized in that: The telescopic spring (10) is covered with a dustproof corrugated tube cover (12).

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