Anti-waterlogging well lid

Abstract

The anti-waterlogging well lid comprises a well lid body, a first bottom plate, a second bottom plate and a base, the first bottom plate and the second bottom plate are fixed to the two sides of the base respectively, the well lid body is clamped to the base, one side of the well lid body is connected with the first bottom plate through a rotary connecting assembly, and a connecting rod is arranged on the bottom face of the other side of the well lid body; a sliding hole is formed in the front part of the second bottom plate; when the bottom face of the well lid body is impacted by external force, the connecting rod is stressed to slide upwards in the sliding hole, the well lid body on the side is separated from the base, and meanwhile the rotating connecting assembly rotates. The anti-waterlogging well lid can greatly improve the drainage efficiency, has additional functions of backward flow prevention, sedimentation prevention, accidental opening prevention and the like, is suitable for various municipal scenes needing drainage such as urban roads, sidewalks, parks, communities and the like, and provides key facility support for urban waterlogging prevention and treatment.

Description

Technical Field

[0001] This invention relates to the field of manhole covers, and more particularly to a manhole cover designed to prevent waterlogging. Background Technology

[0002] Stormwater wells are a key component of urban drainage systems. They mainly collect surface runoff by connecting to drainage pipes through side openings, while bottom infiltration pipes replenish groundwater and discharge excess rainwater into the municipal pipe network.

[0003] Manhole covers are facilities that cover the entrances to inspection wells for underground pipelines, cables, etc. in cities. Their main functions are to prevent falls and facilitate pipeline maintenance.

[0004] Traditional manhole covers are prone to water accumulation and poor drainage during heavy rainfall, which can lead to urban flooding.

[0005] Furthermore, traditional manhole covers typically have a narrow ring-shaped base, with a contact width of only 5-8 cm with the roadbed. The connection points are concentrated at only 2-3 points along the edge of the base. When a vehicle drives over it, the wheel load (a single wheel load on a heavy truck can reach over 80 kN) is transferred through the manhole cover to the base, failing to diffuse over a wider area of ​​the roadbed, leading to a sudden increase in local pressure. The local pressure under the base of a traditional manhole cover can reach 1.2-1.5 MPa, while the design bearing capacity of ordinary municipal roadbeds is only 0.8 MPa. This is equivalent to "lifting a heavy object with a needle tip," inevitably leading to roadbed compression and deformation over time.

[0006] Furthermore, the base of traditional manhole covers is often connected to the roadbed in a "simple stacking" manner, with the edges only fixed by concrete mortar. This lacks a deep anchoring structure, which can easily lead to gaps between the base and the roadbed when encountering fluctuations in groundwater levels or disturbances from nearby construction, causing the foundation to loosen. At the same time, the traditional base is a rigid structure and cannot cope with slight deformations of the roadbed. Once the roadbed settles, the connection between the base and the roadbed will break, which will then cause the manhole cover to shift or tilt.

[0007] To address the problems existing in the background art, the present invention provides a flood-proof manhole cover. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a flood-proof manhole cover and its unlocking structure.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A flood-proof manhole cover includes a manhole cover body, a first base plate, a second base plate, and a base. The first base plate and the second base plate are respectively fixed to both sides of the base. The manhole cover body is engaged with the base, and one side of the manhole cover body is connected to the first base plate through a rotating connecting assembly. A connecting rod is provided on the bottom surface of the other side of the manhole cover body, and a sliding hole is provided at the front of the second base plate. When the bottom surface of the manhole cover body is impacted by an external force, the connecting rod slides upward in the sliding hole, causing the manhole cover body on that side to separate from the base, and the rotating connecting assembly rotates at the same time.

[0011] Furthermore, the bottom of the base has an outer edge, and the contact width between the base and its outer edge and the roadbed is 14-20 cm.

[0012] Furthermore, the inner wall of the base is evenly provided with multiple protrusions, and the outer circumference of the manhole cover body is provided with multiple grooves. When the manhole cover body is placed on the base, the protrusions and grooves match.

[0013] Furthermore, a ring-shaped stress-bearing rib is provided on the upper side of the base.

[0014] Furthermore, the rotating connection assembly includes a rotating shaft, a hook, and a rotating shaft seat. The upper part of the rotating shaft seat is fixed to the manhole cover body, and the lower part of the rotating shaft seat is provided with a rotating shaft. The upper end of the hook is rotatably connected to the rotating shaft. When the manhole cover body is closed, the hook is hooked to the first base plate by gravity. When the manhole cover body is separated from the base, the rotating shaft seat and the manhole cover body rotate around the rotating shaft.

[0015] Furthermore, the end of the connecting rod is provided with a connecting rod limiting protrusion, and the sliding hole is a T-shaped sliding hole.

[0016] Furthermore, the connecting rod is fixed to the bottom surface of the manhole cover body via the connecting rod base.

[0017] Furthermore, multiple roadbed anchorage connection points are evenly provided on the side of the base.

[0018] Furthermore, a groove is provided on the lower side of the first base plate, and a hook is attached to the groove.

[0019] Furthermore, the upper part of the hook, above the rotating pump, is the unlocking position for the manhole cover key.

[0020] The beneficial effects of adopting the technical solution of the present invention are as follows: the anti-flooding manhole cover can greatly improve drainage efficiency, and at the same time has additional functions such as anti-backflow, anti-settlement, and anti-accidental opening. It is suitable for various municipal scenarios that require drainage, such as urban roads, sidewalks, parks, and residential areas, and provides key facility support for urban flood prevention and control. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a flood-proof manhole cover provided by the present invention;

[0022] Figure 2 This is a bottom structure diagram of a flood-prevention well provided by the present invention;

[0023] Figure 3 This is a structural diagram of a flood-prevention manhole cover provided by the present invention after removing the main body of the manhole cover;

[0024] Figure 4 yes Figure 3 Mid-view structural diagram;

[0025] Figure 5 This is a partial structural diagram of a flood-proof manhole cover provided by the present invention.

[0026] Figure 6 This is a diagram of the key structure of a flood-proof manhole cover provided by the present invention.

[0027] The components are as follows: 1. Manhole cover body; 2. Lock hole; 3. Base; 4. Outer edge; 5. Annular reinforcing rib; 6. First base plate; 7. Second base plate; 8. Roadbed anchoring connection position; 9. Protrusion; 10. Groove; 11. Connecting rod; 12. Connecting rod limiting protrusion; 13. Connecting rod connecting base; 14. Sliding hole; 15. Base plate; 16. Rotating shaft; 17. Hook; 18. Unlocking position; 19. Rotating shaft seat; 20. Manhole cover key; 21. Protrusion. Detailed Implementation

[0028] The specific solutions and embodiments of the present invention will be further described with reference to the accompanying drawings.

[0029] The base (3), the main body (1), and the manhole casing form a three-in-one anti-settlement system. Addressing the various problems of traditional manhole covers, such as sinking and displacement caused by concentrated loads, loose foundations, and inconsistent road surface settlement, this flood-resistant manhole cover adopts a composite design with wide-edge load-bearing and multi-point anchoring. This design not only evenly distributes vehicle loads to the roadbed but also accommodates minor road surface settlement and deformation, ensuring the manhole cover remains flush with the road surface for a long period.

[0030] As shown in the figure, a flood-proof manhole cover includes a manhole cover body 1, a first base plate 6, a second base plate 7, and a base 3. The first base plate 6 and the second base plate 7 are respectively fixed to both sides of the base 3. The manhole cover body 1 is engaged with the base 3, and one side of the manhole cover body 1 is connected to the first base plate 6 via a rotating connecting assembly. A connecting rod 11 is provided on the bottom surface of the other side of the manhole cover body 1, and a sliding hole 14 is provided at the front of the second base plate 7. When the bottom surface of the manhole cover body 1 is impacted by an external force, the connecting rod 11 slides upward in the sliding hole 14, causing the manhole cover body 1 on that side to separate from the base 3, and the rotating connecting assembly rotates simultaneously. A bottom plate 15 is provided between the bottom surface of the manhole cover body 1 and the base 3.

[0031] The rotating connection assembly includes a rotating shaft 16, a hook 17, and a rotating shaft seat 19. The upper part of the rotating shaft seat 19 is fixed to the manhole cover body 1, and the lower part of the rotating shaft seat 19 is provided with the rotating shaft 16. The upper end of the hook 17 is rotatably connected to the rotating shaft 16. When the manhole cover body 1 is closed, the hook 17 is hooked onto the first base plate 6 by gravity. When the manhole cover body 1 is separated from the base 3, the rotating shaft seat 19 and the manhole cover body 1 rotate around the rotating shaft 16. The end of the connecting rod 11 is provided with a connecting rod limiting protrusion 12, and the sliding hole 14 is a T-shaped sliding hole 14. During normal use, due to the angle of water flow and airflow impact, the connecting rod limiting protrusion 12 will not fall out of the T-shaped sliding hole 14, thus playing a limiting role. The connecting rod 11 is fixed to the lower bottom surface of the manhole cover body 1 through the connecting rod connecting base 13. The lower side of the first base plate 6 is provided with a groove, and the hook 17 is hooked onto the groove.

[0032] During the operation of urban drainage systems, "water impact on manhole covers" and "air compression" are two easily overlooked but significantly harmful phenomena. Especially during extreme weather events such as rainstorms and heavy rainfall, large amounts of rainwater rush into underground pipes, which not only creates a strong water impact on manhole covers but also generates an air compression effect within the pipes. The combination of these two factors can exacerbate the loosening and displacement of manhole covers, and may even lead to safety accidents where manhole covers are washed away.

[0033] Mechanically triggered manhole covers rely on a direct physical response to pressure / water level, requiring no external energy. Flood-resistant manhole covers utilize water or air pressure to push mechanical components to unlock the cover's locking mechanism, releasing pressure by lifting the front of the cover. The cover then automatically resets as the pressure recedes. When heavy rain causes a sudden rise in water level within the pipes and air compression creates high pressure, the mechanism responds quickly to release the pressure.

[0034] By employing a dual mechanism of "active pressure relief + pressure buffering," the system avoids risks such as accidental opening of manhole covers and rupture of manholes caused by high pressure inside the pipeline. It also helps improve drainage efficiency and is particularly suitable for drainage systems in old urban areas with smaller pipe diameters and longer drainage paths, filling the gap in "pressure control" in traditional flood prevention designs.

[0035] The connecting rod 11 slides upward along the sliding hole 14, converting part of the vertical impact force into frictional force along the groove wall, while guiding the pressure to be dispersed to the roadbed around the base 3. The pressure of a traditional manhole cover is concentrated in the center of the cover, while this structure can expand the pressure dispersion range to the roadbed area 30cm outside the manhole frame, reducing the local pressure by 40%-60%.

[0036] The base 3 has an outer edge 4 at its bottom. The contact width between the base 3 and its outer edge 4 and the roadbed is 14-20 cm, which is the width of the entire annular bottom surface of the base 3. This large contact width results in a wide stress-bearing area. The upper side of the base 3 has an annular reinforcing rib 5, transforming the vehicle load from "point contact" to "surface contact." Specifically, when a vehicle wheel runs over the manhole cover, the load is transferred through the manhole cover body 1 to the settlement base 3. The wide-edge structure evenly distributes the load within a roadbed area with a diameter of 1.2-1.5 meters, reducing the local pressure to below 0.5 MPa, far below the roadbed's bearing capacity. This not only prevents the roadbed from compressing due to local overload but also reduces stress concentration between the manhole cover body 1 and the base 3, extending the service life of the manhole cover. Actual test data shows that manhole covers with a wide-edge load-bearing design show no significant subsidence after 3 years on road sections with an average daily traffic of 5,000 heavy vehicles, while traditional manhole covers show 2-3 cm of localized indentation within one year under the same conditions.

[0037] The base 3 has multiple roadbed anchorage connection positions 8 evenly distributed on its side, as shown in the figure (12 in total). The number can be adjusted according to actual needs, and the preferred depth of the roadbed anchorage connection positions 8 is 9cm. During construction and installation, the roadbed anchorage connection positions 8 are directly embedded into the deep soil of the roadbed or the concrete base layer, forming an interlocking connection with the roadbed. Even if fluctuations in the groundwater level cause slight shrinkage of the surface roadbed, the anchorage structure can firmly fix the position of the base 3, preventing the base 3 from detaching from the roadbed and fundamentally eliminating the hidden danger of "foundation loosening".

[0038] The inner wall of the base 3 is evenly provided with multiple protrusions 9, and the outer circumference of the manhole cover body 1 is provided with multiple grooves 10. When the manhole cover body 1 is closed on the base 3, the protrusions 9 and the grooves 10 are engaged. The automatic locking function relies on the weight of the hook 17. When the manhole cover is completely lowered into the positioning groove of the manhole frame (deviation ≤2mm), the grooves 10 of the manhole cover body 1 and the protrusions 9 on the inner wall of the base 3 are precisely aligned.

[0039] The upper part of the hook 17, above the rotating part, is the unlocking position 18 of the manhole cover key 20. The protrusion 21 of the manhole cover key 20 is approximately elliptical in shape, as shown in the figure. When the manhole cover needs to be opened, pass it through the lock hole 2, rotate the manhole cover key 20, and the protrusion 21 abuts against the unlocking position 18 on the upper part of the hook 17. The hook 17 disengages from the slot, and then the manhole cover key 20 is lifted, lifting the manhole cover body 1. At the same time, the connecting rod limiting protrusion 12 at the end of the connecting rod 11 is removed from the T-shaped sliding hole 14, thus opening the manhole cover.

[0040] The pry structure, by optimizing the connection details between the manhole cover and the frame and adding anti-damage components, resists malicious prying by people using tools such as crowbars and hydraulic shears.

[0041] The triple anti-theft mechanism of "mechanical locking + customized key + anti-pry structure" effectively prevents illegal opening without affecting the pressure relief function, drainage efficiency and daily maintenance convenience. At the same time, it meets the needs of municipal operation and maintenance personnel for quick unlocking, fills the design gap of "property security protection" in flood prevention manhole covers, and is suitable for scenarios where manhole cover theft is prone to occur, such as densely populated urban main roads, commercial centers and remote suburbs.

[0042] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A flood-prevention well lid, characterized by The manhole cover includes a main body, a first base plate, a second base plate, and a base. The first base plate and the second base plate are fixed to both sides of the base. The main body of the manhole cover is engaged with the base, and one side of the main body of the manhole cover is connected to the first base plate through a rotating connecting assembly. A connecting rod is provided on the bottom surface of the other side of the main body of the manhole cover, and a sliding hole is provided at the front of the second base plate. When the bottom surface of the main body of the manhole cover is impacted by an external force, the connecting rod slides upward in the sliding hole, causing the main body of the manhole cover on that side to separate from the base, and the rotating connecting assembly rotates at the same time.

2. The flood-proof manhole cover according to claim 1, characterized in that, The base has an outer edge at the bottom, and the contact width between the base and its outer edge and the roadbed is 14-20 cm.

3. A flood-proof manhole cover according to claim 1, characterized in that, The inner wall of the base is evenly provided with multiple protrusions, and the outer circumference of the manhole cover body is provided with multiple grooves. When the manhole cover body is placed on the base, the protrusions and grooves match.

4. The anti-inundation well cover according to claim 1, characterized in that The upper side of the base is equipped with a ring-shaped stress-bearing rib.

5. The anti-inundation well cover according to claim 1, wherein, The rotating connection assembly includes a rotating shaft, a hook, and a rotating shaft seat. The upper part of the rotating shaft seat is fixed to the manhole cover body, and the lower part of the rotating shaft seat is provided with a rotating shaft. The upper end of the hook is rotatably connected to the rotating shaft. When the manhole cover body is closed, the hook is hooked to the first base plate by gravity. When the manhole cover body is separated from the base, the rotating shaft seat and the manhole cover body rotate around the rotating shaft.

6. The anti-inundation well cover according to claim 1, wherein, The connecting rod end is provided with a connecting rod limiting protrusion, and the sliding hole is a T-shaped sliding hole.

7. The anti-inundation well cover according to claim 1, wherein, The connecting rod is fixed to the bottom surface of the manhole cover body via the connecting rod base.

8. The anti-inundation well cover according to claim 1, wherein, The base has multiple roadbed anchoring connection points evenly distributed on its side.

9. The anti-inundation well cover according to claim 5, wherein, The bottom of the first base plate has a groove, and the hook is attached to the groove.

10. The anti-inundation well cover according to claim 5, wherein, The upper part of the hook, above the rotating part, is the unlocking position for the manhole cover key.

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