Stormwater inspection well drain well cover
By designing drainage holes, diversion pipes, and magnetic suction devices on rainwater inspection manhole covers, efficient drainage and odor prevention functions are achieved during heavy rainfall, solving the problem of insufficient drainage of existing manhole covers during heavy rainfall, and improving road safety and maintenance convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING JIAOJIAN ENG SURVEY & DESIGN CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-14
AI Technical Summary
The existing manhole covers for rainwater inspection are not capable of draining water during heavy rainfall, leading to road flooding and affecting driving safety.
A rainwater inspection well drain cover with a drainage hole, a diversion pipe and a trash rack was designed. It uses a magnetic suction device and a water baffle to separate and drain the water during rainy days and reset it after the rain stops. The magnetic suction device prevents odor from overflowing and makes it easy to replace the trash rack.
It improves the drainage capacity of the road drainage system, avoids water accumulation on the road during heavy rainfall, enhances driving safety, effectively prevents odor overflow, and simplifies the maintenance process of the trash rack.
Smart Images

Figure CN224495360U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of municipal drainage equipment technology, specifically relating to a rainwater inspection well drainage cover that prevents road water accumulation and improves the drainage capacity of the road drainage system during heavy rainfall. Background Technology
[0002] The traditional design for drainage at the lowest points of underpasses and low-lying, flood-prone sections of municipal roads involves installing storm drains along the curb. However, due to the volatile nature of global climate change, some areas experience significant instantaneous rainfall. The traditional design of storm drains cannot meet the increased capacity of these drains, leading to road flooding and compromising driving safety.
[0003] Most existing storm drain manhole covers are manufactured as a single piece, with limited drainage capacity due to the gap between the cover and the base, which cannot meet the drainage needs of sudden heavy rainfall. In extreme weather conditions with increased rainfall, if it's during the daytime rush hour, traffic management departments close flooded sections of road, and municipal workers will open the entire storm drain manhole cover to allow water to drain. However, at night or when the water is too deep, the road is generally left to flood, compromising driving safety.
[0004] In summary, due to their structure, existing storm drain manhole covers make it easy for water to accumulate on the road surface during heavy rainfall, resulting in poor drainage capacity of the road drainage system and thus affecting driving safety. Utility Model Content
[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a rainwater inspection well drainage cover that can prevent road water accumulation and improve the drainage capacity of the road drainage system during heavy rainfall.
[0006] The technical solution of this utility model is as follows: A rainwater inspection well drainage cover includes a well cover body, wherein: at least one drainage hole is provided in the ribbed gap of the well cover body, the lower edge of the drainage hole is connected to a drainage pipe, and a debris barrier is provided on the upper edge of the drainage hole. The debris barrier is fixedly connected to the well cover body by at least two well cover locks; a baffle plate is provided at the lower end of the drainage pipe, and the baffle plate is magnetically connected to the drainage pipe by a magnetic attraction device. At the same time, the baffle plate is connected to the outer wall of the drainage pipe or the inner bottom plate of the well cover body by a pin.
[0007] In use, the baffle separates from the drainage pipe when subjected to water pressure during rainy weather, thus achieving drainage; after the rain stops, the baffle is reset by a magnetic attraction device and tightly connected to the drainage pipe.
[0008] To facilitate the assembly and replacement of the trash rack and manhole cover, the above solution further includes: the manhole cover lock is located in the manhole cover lock mounting hole of the trash rack;
[0009] Under normal circumstances, the lock cylinder of the manhole cover lock is located in the manhole cover lock mounting hole. After the lock tongue of the manhole cover lock extends out of the lock tongue channel on the side wall of the manhole cover lock mounting hole, it is inserted into the locking hole on the manhole cover body to fix the trash rack and the manhole cover body together.
[0010] When the trash rack needs to be replaced, insert the key into the keyhole on the lock cylinder and turn the lock cylinder to move the lock tongue back into the manhole cover lock mounting hole, so that the trash rack is separated from the manhole cover body. Then, the municipal workers will remove the damaged trash rack from the trash rack. Finally, the municipal workers will place the new trash rack in the manhole cover lock mounting hole and turn the new trash rack so that the lock tongue is inserted into the locking hole on the manhole cover body to fix the trash rack to the manhole cover body as one unit.
[0011] To ensure both drainage and odor prevention functions and facilitate the assembly of the baffle plate, the above solution further includes: the lower end of the drainage pipe has an inclined cross-section, the magnetic attraction device is a permanent magnet ring that matches the inclined cross-section, and the permanent magnet ring is fixed to the inclined cross-section by screws; the baffle plate is fixed to the connecting column by a pin, and the top of the connecting column is welded to the inner bottom plate of the well cover body.
[0012] Due to its structure, this invention improves the drainage capacity of the road drainage system through the design of the drainage holes and diversion pipes, preventing road flooding during heavy rainfall and enhancing driving safety during such periods. The combination of the baffle plate and the magnetic suction device ensures drainage while preventing odor leakage. The debris-blocking grille effectively intercepts debris, reducing the risk of blockage and simplifying maintenance. Attached Figure Description
[0013] A brief explanation of the contents of each figure in the instruction manual and the markings in the figures is provided:
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 for Figure 1 Enlarged structural diagram at point E;
[0016] Figure 3 This is a top view of the structure of this utility model;
[0017] Figure 4 This is a structural schematic diagram of the manhole cover body of this utility model from a bottom view.
[0018] In the diagram: 1. Manhole cover body; 2. Drainage hole; 3. Drainage pipe; 4. Trash screen; 501. Lock cylinder; 502. Lock tongue; 503. Lock tongue channel; 504. Keyhole; 5. Manhole cover lock; 6. Water baffle; 7. Magnetic suction device; 8. Manhole cover lock mounting hole; 9. Inclined section; 10. Pin; 11. Connecting column. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings, providing a non-limiting embodiment. However, it should be understood that these descriptions are merely illustrative and not intended to limit the scope of the present invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.
[0020] In the description of this utility model, it should be understood that the use of terms such as "center," "vertical," "horizontal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, is merely for the convenience of describing this utility model and simplifying the description, and does 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, it should not be construed as a limitation of this utility model. Furthermore, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] like Figures 1 to 4As shown, a rainwater inspection well drainage cover includes a cover body 1, wherein: at least one drainage hole 2 is provided in the ribbed gap of the cover body 1, the lower edge of the drainage hole 2 is connected to a drainage pipe 3, and a debris barrier 4 is provided on the upper edge of the drainage hole 2. The debris barrier 4 is fixedly connected to the cover body 1 by at least two cover locks 5; a baffle plate 6 is provided at the lower end of the drainage pipe 3, and the baffle plate 6 is magnetically connected to the drainage pipe 3 by a magnetic attraction device 7. At the same time, the baffle plate 6 is connected to the outer wall of the drainage pipe 3 or the inner bottom plate of the cover body 1 by a pin 10.
[0023] In use, the baffle plate 6 separates from the drainage pipe 3 under the pressure of water flow during rainy weather, thus achieving drainage; after the rainfall stops, the baffle plate 6 is reset by the magnetic attraction device 7 and tightly connected to the drainage pipe 3. In this embodiment, the lower end of the baffle plate 6 and the drainage pipe 3 are connected by a pin 10, and the baffle plate 6 swings along the axis of the pin 10 under the action of external force. In specific implementation, as long as it rains, the drainage hole 2 can serve as a supplement to the drainage of the water grate on the municipal road, improving the drainage capacity of the road drainage system, avoiding road water accumulation during heavy rainfall, improving driving safety during heavy rainfall, and effectively preventing traffic accidents caused by the re-transmission of water to flooded vehicles due to heavy rainfall. In the above scheme, the manhole cover body 1 and the trash rack 4 are made of ductile iron, and the baffle plate 6 can be made of metal.
[0024] To facilitate the assembly and replacement of the debris barrier 4 with the manhole cover body 1, in the above embodiment, preferably, the manhole cover lock 5 is located in the manhole cover lock mounting hole 8 of the debris barrier 4;
[0025] Under normal circumstances, the lock core 501 of the manhole cover lock 5 is located in the manhole cover lock mounting hole 8. The lock tongue 502 of the manhole cover lock 5 extends out of the lock tongue channel 503 on the side wall of the manhole cover lock mounting hole 8 and is inserted into the locking hole on the manhole cover body 1 to fix the debris screen 4 and the manhole cover body 1 into one piece.
[0026] When the debris barrier 4 needs to be replaced, insert the key into the keyhole 504 on the lock cylinder 501 and rotate the lock cylinder 501 to drive the lock tongue 502 back into the manhole cover lock mounting hole 8, so that the debris barrier 4 is separated from the manhole cover body 1. Then, the municipal worker removes the damaged debris barrier 4 from the manhole cover body 1. Finally, the municipal worker places the new debris barrier 4 into the manhole cover lock mounting hole 8, rotates the new debris barrier 4 so that the lock tongue 502 is inserted into the locking hole on the manhole cover body 1, and fixes the debris barrier 4 to the manhole cover body 1 as one unit.
[0027] To ensure both drainage and odor prevention functions and facilitate the assembly of the baffle plate 6, in the above embodiment, preferably: the lower end of the drainage pipe 3 has an inclined section 9, the magnetic attraction device 7 is a permanent magnet ring that matches the inclined section 9, and the permanent magnet ring is fixed to the inclined section 9 by screws; the baffle plate 6 is fixed to the connecting column 11 by a pin 10, and the top end of the connecting column 11 is welded to the inner bottom plate of the manhole cover body 1.
[0028] All components in the above embodiments are commercially available products. In the specific implementation of the rainwater inspection well drain cover described in the above embodiments, the connection between the cover and the well base is achieved using conventional methods.
[0029] The working process of the rainwater inspection well drainage cover described in the above embodiment is as follows: During rainy weather, road runoff enters the drainage pipe 3. As the water flows into the baffle plate 6, the pressure on the baffle plate 6 gradually increases, causing it to sink due to pressure exceeding the attraction of the magnetic suction device 7. The baffle plate 6 gradually separates from the drainage pipe 3, allowing the rainwater runoff to drain through the drainage holes 2 on the cover body 1. When the rainfall stops and there is no runoff on the road, the water pressure acting on the baffle plate 6 disappears. The baffle plate 6, through the attraction of the magnetic suction device 7, tightly seals itself to the drainage pipe 3, preventing toxic and odorous gases from the inspection well from drifting out through the drainage holes 2. When the debris barrier 4 is blocked by leaves or other garbage, sanitation workers can simply clean the blockage from the road surface.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A rainwater inspection well drainage cover, comprising a cover body (1), characterized in that: At least one drainage hole (2) is provided in the ribbed gap of the manhole cover body (1). The lower edge of the drainage hole (2) is connected to a drainage pipe (3). A debris barrier (4) is provided on the upper edge of the drainage hole (2). The debris barrier (4) is fixedly connected to the manhole cover body (1) by at least two manhole cover locks (5). A baffle plate (6) is provided at the lower end of the drainage pipe (3). The baffle plate (6) is magnetically connected to the drainage pipe (3) by a magnetic attraction device (7). At the same time, the baffle plate (6) is connected to the outer wall of the drainage pipe (3) or the inner bottom plate of the manhole cover body (1) by a pin (10). When in use, the baffle (6) separates from the drainage pipe (3) under the pressure of water flow during rainy weather to achieve drainage; after the rain stops, the baffle (6) is reset by the magnetic attraction device (7) and tightly connected to the drainage pipe (3).
2. The rainwater inspection well drain cover as described in claim 1, characterized in that: The manhole cover lock (5) is located in the manhole cover lock mounting hole (8) of the trash rack (4); Under normal circumstances, the lock core (501) of the manhole cover lock (5) is located in the manhole cover lock mounting hole (8), and the lock tongue (502) of the manhole cover lock (5) extends out of the lock tongue channel (503) on the side wall of the manhole cover lock mounting hole (8) and is inserted into the locking hole on the manhole cover body (1) to fix the debris screen (4) and the manhole cover body (1) into one piece; When the trash rack (4) needs to be replaced, insert the key into the keyhole (504) on the lock cylinder (501) and turn the lock cylinder (501) to drive the lock tongue (502) back into the manhole cover lock mounting hole (8), so that the trash rack (4) is separated from the manhole cover body (1). Then the municipal worker removes the damaged trash rack (4) from the trash rack (4). Finally, the municipal worker places the new trash rack (4) in the manhole cover lock mounting hole (8) and turns the new trash rack (4) so that the lock tongue (502) is inserted into the locking hole on the manhole cover body (1) to fix the trash rack (4) and the manhole cover body (1) together.
3. The rainwater inspection well drain cover as described in claim 1, characterized in that: The lower end of the drainage pipe (3) has an inclined section (9), and the magnetic suction device (7) is a permanent magnet ring that matches the inclined section (9). The permanent magnet ring is fixed to the inclined section (9) by screws. The baffle plate (6) is fixed to the connecting column (11) by a pin (10). The top of the connecting column (11) is welded to the inner bottom plate of the well cover body (1).