Anti-backflow mechanism of composite well lid

Abstract

The utility model relates to an anti-backflow mechanism of a composite well lid, which belongs to the field of composite well lids, and comprises a well lid body, a frame body fixedly connected to the upper surface of the well lid body and a top plate arranged at the top of the frame body, and the bottom of the well lid body is provided with an anti-backflow structure for preventing rainwater from flowing backwards. The anti-backflow structure comprises a connecting rod fixedly connected to the bottom of the well lid body, a floating plate slidably connected to the outer side of the connecting rod, a sealing gasket fixedly connected to the upper surface of the floating plate and an activated carbon layer fixedly connected to the bottom of the floating plate. According to the anti-backflow mechanism of the composite well lid, through the anti-backflow structure, rainwater is effectively prevented from flowing backwards from the well lid in rainstorm weather, so that the risk of urban waterlogging is reduced, the life and property safety of residents and normal operation of cities are guaranteed, in addition, through arrangement of a top plate, cigarette ends, plastic bags and other sundries are effectively prevented from directly penetrating through the well lid body to enter a sewer, and the sewer is protected. The blockage caused by entering the sewer is prevented, and the normal use of the sewer is ensured.

Description

Technical Field

[0001] The utility model relates to an anti-backflow mechanism for a composite manhole cover, belonging to the field of composite manhole covers. Background Art

[0002] In the context of the rapidly changing urbanization process today, the drainage system, as an indispensable infrastructure in the urban context, its operating efficiency and stability are directly related to the flood control safety, waterlogging drainage capacity of the city, as well as the quality of life and travel convenience of the general residents. With the frequent occurrence of extreme weather events, especially the arrival of the rainy season, the challenges faced by the drainage system are becoming increasingly severe.

[0003] When encountering heavy rain, if the drainage system is poorly designed or maintained, rainwater backflow is very likely to occur. A large amount of untreated rainwater gushes out directly from the manhole cover, flooding the streets, thus affecting the life and travel of nearby residents. Therefore, preventing rainwater backflow is a key link in improving the urban waterlogging drainage capacity. On the other hand, manhole covers often become the "entrance" for urban garbage and sundries due to their large openings and lack of effective filtering barriers. Light pollutants such as plastic bags and paper scraps are very likely to enter the sewer, gradually accumulating to form blockages, seriously reducing the drainage efficiency. More seriously, sundries containing flammable substances such as cigarette butts, once entering the sewer, may cause explosions or fires under certain conditions, posing a potential threat to urban safety. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides an anti-backflow mechanism for a composite manhole cover, which has the advantages of preventing rainwater backflow and preventing sundries from entering the sewer.

[0006] (2) Technical Solutions

[0007] To achieve the above purposes of preventing rainwater backflow and preventing sundries from entering the sewer, the utility model provides the following technical solutions: an anti-backflow mechanism for a composite manhole cover, including a manhole cover body, a frame fixedly connected to the upper surface of the manhole cover body, and a top plate arranged on the top of the frame. The bottom of the manhole cover body is provided with an anti-backflow structure for preventing rainwater backflow;

[0008] The anti-backflow structure includes a connecting rod fixedly connected to the bottom of the manhole cover body, a floating plate slidably connected to the outside of the connecting rod, a sealing pad fixedly connected to the upper surface of the floating plate, and an activated carbon layer fixedly connected to the bottom of the floating plate.

[0009] Furthermore, the number of the connecting rods is two, and the two connecting rods are respectively arranged on the left side and the right side of the bottom of the manhole cover body.

[0010] Further, sliding holes are formed in both the left edge and the right edge of the floating plate, and the two connecting rods are respectively slidably connected to the floating plate through the corresponding sliding holes.

[0011] Further, a connecting plate is fixedly connected between the bottoms of the two connecting rods, and a filter screen is fixedly connected between the opposite side walls of the two connecting plates.

[0012] Further, a plurality of water inlets are formed inside the manhole cover body, and the plurality of water inlets are all located in the area covered by the frame body. Through holes are formed in the front, back, left side wall and right side wall of the frame body.

[0013] Further, a plurality of floating balls are fixedly connected to the bottom of the top plate, and the plurality of floating balls are all located in the area covered by the frame body.

[0014] Further, fixing plates are fixedly connected to both the left side and the right side of the upper surface of the manhole cover body. Guide rods are fixedly connected to the opposite side walls of the two fixing plates. Guide blocks are slidably connected to the outer sides of the two guide rods. The left guide block is fixedly connected to the left side wall of the top plate, and the right guide block is fixedly connected to the right side wall of the top plate.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides an anti-backflow mechanism for a composite manhole cover, which has the following beneficial effects:

[0017] The anti-backflow mechanism of the composite manhole cover effectively prevents rainwater from flowing back out of the manhole cover in heavy rain through the anti-backflow structure, thereby reducing the risk of urban waterlogging, ensuring the safety of residents' lives and property and the normal operation of the city. In addition, the setting of the top plate effectively prevents sundries such as cigarette butts and plastic bags from directly passing through the manhole cover body and entering the sewer, preventing blockage caused by their entry into the sewer and ensuring the normal use of the sewer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a perspective view of the frame body in the structure of the present utility model;

[0020] Figure 3 is a front view of the present utility model.

[0021] In the figure: 1, manhole cover body; 2, frame body; 3, top plate; 4, connecting rod; 5, floating plate; 6, sealing gasket; 7, activated carbon layer; 8, connecting plate; 9, filter screen; 10, floating ball; 11, fixing plate; 12, guide rod; 13, guide block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 3 , an anti-backflow mechanism for a composite manhole cover, including a manhole cover body 1, a frame body 2 fixedly connected to the upper surface of the manhole cover body 1, and a top plate 3 arranged on the top of the frame body 2. An anti-backflow structure for preventing rainwater from flowing back is provided at the bottom of the manhole cover body 1.

[0024] As Figure 1 shown, the anti-backflow structure includes a connecting rod 4 fixedly connected to the bottom of the manhole cover body 1, a floating plate 5 slidably connected to the outside of the connecting rod 4, a sealing gasket 6 fixedly connected to the upper surface of the floating plate 5, and an activated carbon layer 7 fixedly connected to the bottom of the floating plate 5.

[0025] It should be noted that the number of the connecting rods 4 is two, and the two connecting rods 4 are respectively arranged on the left side and the right side of the bottom of the manhole cover body 1.

[0026] Sliding holes are formed in the left and right edges of the floating plate 5, and the two connecting rods 4 are respectively slidably connected to the floating plate 5 through the corresponding sliding holes.

[0027] A connecting plate 8 is fixedly connected between the bottom ends of the two connecting rods 4, and a filter screen 9 is fixedly connected between the opposite side walls of the two connecting plates 8.

[0028] A plurality of water inlets are formed inside the manhole cover body 1, and all the plurality of water inlets are located in the area covered by the frame body 2. Through openings are formed in the front, back, left side wall, and right side wall of the frame body 2.

[0029] A plurality of floating balls 10 are fixedly connected to the bottom of the top plate 3, and all the plurality of floating balls 10 are located in the area covered by the frame body 2.

[0030] Fixing plates 11 are fixedly connected to the left side and the right side of the upper surface of the manhole cover body 1 respectively. Guide rods 12 are fixedly connected to the opposite side walls of the two fixing plates 11. Guide blocks 13 are slidably connected to the outside of the two guide rods 12. The guide block 13 on the left side is fixedly connected to the left side wall of the top plate 3, and the guide block 13 on the right side is fixedly connected to the right side wall of the top plate 3.

[0031] In addition, the floating plate 5 should be made of a lightweight, water-resistant, and corrosion-resistant material, such as high-density polyethylene or polypropylene, to ensure its stability and durability in water.

[0032] The gasket 6 should be made of a soft, wear-resistant, and highly elastic material, such as butyl rubber or silica gel, to ensure a tight fit with the water inlet of the manhole cover body 1 and achieve a good sealing effect.

[0033] As a key component for intercepting debris, the filter screen 9 should be cleaned regularly to keep the sewer unobstructed.

[0034] To ensure the smooth sliding of the top plate 3 on the guide rods 12, the guide rods should be lubricated, and wear-resistant materials should be selected for making the guide blocks and guide rods to reduce friction and wear and extend the service life.

[0035] For the metal components exposed outside, such as the manhole cover body 1, the connecting rod 4, and the fixing plate 11, anti-corrosion treatment should be carried out, such as galvanizing or spraying anti-corrosion paint, to prevent damage caused by oxidation and corrosion.

[0036] Both the upper and lower ends of the left guide rod 12 bend to the left and are fixedly connected to the right side wall of the left fixing plate 11, and both the upper and lower ends of the right guide rod 12 bend to the right and are fixedly connected to the left side wall of the right fixing plate 11.

[0037] The guide rods 12 on the two fixing plates 11 are slidably connected to the guide blocks 13 on both sides of the top plate 3, providing a stable lifting track for the top plate and ensuring the smoothness and accuracy of the top plate during the lifting process, preventing deviation or damage due to external forces.

[0038] The working principle of the above embodiment is as follows:

[0039] When the water level rises and approaches the manhole cover body 1, the buoyancy of the water acts on the floating plate 5, pushing it to slide upward along the connecting rod 4. The gasket 6 fixed on the upper surface of the floating plate 5 also rises until it closely fits with the water inlet of the manhole cover body 1, forming an effective sealing barrier to block the continued backflow of rainwater. At the same time, the activated carbon layer 7 provided at the bottom of the floating plate 5 can adsorb impurities and odors in the water to a certain extent, improving the water purification effect. The filter screen 9 can effectively intercept larger particles of debris, preventing them from entering the sewer and causing blockages, while allowing water to pass through smoothly;

[0040] The water inlet inside the manhole cover body 1 cooperates with the through openings on the walls of the frame body 2 to form an inlet channel. Under normal circumstances, rainwater passes through the through openings of the frame body 2 and then is discharged into the sewer through the water inlet of the manhole cover body 1. The top plate 3, as a physical barrier, effectively prevents debris such as cigarette butts and plastic bags from directly passing through the manhole cover body 1 and entering the sewer;

[0041] When encountering heavy rain, rainwater accumulates in the area covered by the manhole cover body 1 and the frame body 2, and the water level gradually rises. At this time, the floating ball 10 fixed to the bottom of the top plate 3 will rise as the water level rises. The buoyancy of the floating ball 10 will push the top plate 3 to slide upward along the guide rod 12, thereby increasing the space between the top plate 3 and the frame body 2, enabling more rainwater to smoothly enter the sewer through the water inlet, and thus improving the drainage efficiency.

[0042] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-backflow mechanism for a composite manhole cover, comprising a manhole cover body (1), a frame body (2) fixedly connected to the upper surface of the manhole cover body (1), and a top plate (3) arranged on the top of the frame body (2), characterized in that: The bottom of the manhole cover body (1) is provided with an anti-backflow structure for preventing rainwater from flowing back; The anti-backflow structure includes a connecting rod (4) fixedly connected to the bottom of the manhole cover body (1), a floating plate (5) slidably connected to the outside of the connecting rod (4), a sealing gasket (6) fixedly connected to the upper surface of the floating plate (5), and an activated carbon layer (7) fixedly connected to the bottom of the floating plate (5).

2. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: The number of the connecting rods (4) is two, and the two connecting rods (4) are respectively arranged on the left side and the right side of the bottom of the manhole cover body (1).

3. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: Sliding holes are formed in the left edge and the right edge of the floating plate (5), and the two connecting rods (4) are respectively slidably connected to the floating plate (5) through the corresponding sliding holes.

4. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: A connecting plate (8) is fixedly connected between the bottoms of the two connecting rods (4), and a filter screen (9) is fixedly connected between the opposite side walls of the two connecting plates (8).

5. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: A plurality of water inlets are formed in the inner side of the manhole cover body (1), and the plurality of water inlets are all located in the area covered by the frame body (2). Through openings are formed in the front, back, left side wall and right side wall of the frame body (2).

6. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: A plurality of floating balls (10) are fixedly connected to the bottom of the top plate (3), and the plurality of floating balls (10) are all located in the area covered by the frame body (2).

7. The anti-backflow mechanism of a composite manhole cover according to claim 1, characterized in that: Fixing plates (11) are fixedly connected to the left side and the right side of the upper surface of the manhole cover body (1). Guide rods (12) are fixedly connected to the opposite side walls of the two fixing plates (11). Guide blocks (13) are slidably connected to the outside of the two guide rods (12). The guide block (13) on the left side is fixedly connected to the left side wall of the top plate (3), and the guide block (13) on the right side is fixedly connected to the right side wall of the top plate (3).

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