Rain and sewage separation intersection well structure in old urban area

Abstract

The utility model relates to rain and sewage diversion field especially old city rain and sewage diversion intersection well structure. In order to overcome the problem that the existing well chamber overflows sewage in peak period. The utility model provides an old city rain and sewage diversion intersection well structure, including intersection well, drainage component and emergency assembly, the intersection well is composed of sewage well chamber on both sides and the rainwater well chamber in the middle, each well chamber is equipped with the interface that has the upper and lower water pipe connection, the drainage component is connected with each well chamber interface, the emergency assembly is located in the rainwater well chamber. Two interval sewage well chambers are communicated through the communicating pipe, and the sewage of sewage well chamber is shared, so that the single sewage well chamber can increase the space, and the sewage outlet pipe of another sewage well chamber can also drain, so that the drainage capacity is also increased, and the emergency sewage discharge function is realized.

Description

Technical Field

[0001] This utility model relates to the field of rainwater and sewage separation, and in particular to a structure of a rainwater and sewage separation junction well in old urban areas. Background Technology

[0002] Separate stormwater and sewage manholes are crucial nodes in the drainage system of old urban areas. Their main function is to physically separate and divert stormwater and sewage. Each sewage manhole typically collects domestic sewage from a specific area and transports it to a sewage treatment plant via a pipe network. However, over time, suspended solids carried in the sewage gradually accumulate at the bottom of the manhole, forming a sediment layer. This not only reduces the actual water storage capacity of the manhole but also decreases the drainage capacity of the sewage outlet pipe, thus limiting the manhole's volume and drainage capacity. Currently, the common practice is to use vacuum trucks to periodically remove the sediment layer from the bottom of the sewage manholes to restore their water storage capacity and drainage capacity.

[0003] Currently, these manholes are generally equipped with warning water levels and a reserve emergency water level between the warning level and the actual overflow level. When the inflow of domestic sewage is at a normal level, this reserve emergency water level provides sufficient time for the sewage suction truck to arrive on site and complete the extraction of the silt layer. However, the problem is that during peak periods of domestic sewage discharge, when the sewage inflow exceeds normal values, the sewage may exceed the warning water level or even overflow before the next extraction cycle of the sewage suction truck. If the problem is only discovered after the sewage has overflowed, and the sewage suction truck is notified for extraction, the overflow has often already caused environmental pollution, adversely affecting the living environment of surrounding residents and the overall sanitation of the city.

[0004] Therefore, this utility model proposes a stormwater and sewage diversion manhole structure for old urban areas, which can effectively solve the problem of sewage overflow during peak hours in existing manholes. Utility Model Content

[0005] This utility model provides a structure for a rainwater and sewage separation and confluence well in an old urban area.

[0006] The technical solution of this utility model is as follows: it includes a manifold, a drainage component, and an emergency component; the manifold consists of two sewage well chambers on both sides and a central rainwater well chamber; each well chamber is provided with an interface for connecting water inlet and outlet pipes, and the drainage component is connected to the interface of each well chamber; the emergency component is located in the rainwater well chamber, and the emergency component includes a connecting pipe that runs through the rainwater well chamber and is connected at both ends to the sewage well chambers on both sides respectively. Through the connection between the connecting pipe and the sewage well chambers on both sides, the sewage well chambers on both sides can serve as emergency expansion wells for each other.

[0007] The connecting pipe has an arched structure with a triangular internal structure, and the two ends slope from high to low. The internal structure of the connecting pipe reduces the retention of suspended matter.

[0008] The emergency component also includes a connecting pipe, which is located in the middle of the connecting pipe and is connected to it. The highest point of the connecting pipe is on the same plane as the lowest point of the rainwater inlet pipe in the rainwater pipe group.

[0009] The one-way valve is located within the diameter of the connecting pipe. The one-way valve controls the flow of high-level rainwater from the central rainwater well chamber of the confluence well to the connecting pipe, so that the sewage well chamber (2) can be used as an emergency expansion well for rainwater.

[0010] The sewage pipe assembly includes a sewage inlet pipe and a sewage outlet pipe. The sewage pipe assembly is arranged symmetrically. The sewage inlet pipe is located on one side of the sewage well chamber of the confluence well, and the height of the sewage inlet pipe is higher than that of the connecting pipe.

[0011] The diameter of the sewage outlet pipe is larger than the diameter of the sewage inlet pipe.

[0012] The sewage outlet pipe is located on the opposite side of the connecting pipe, and the height of the sewage outlet pipe is set at one-third of the longitudinal depth of the sewage well chamber of the confluence well.

[0013] The rainwater pipe assembly includes a rainwater inlet pipe and a rainwater outlet pipe. The rainwater pipe assembly is located in the rainwater well chamber of the manifold and is on the same side as the sewage inlet pipe.

[0014] The connecting pipe runs horizontally through the middle of the rainwater well chamber of the confluence well, and the distance between the connecting pipe and the rainwater inlet pipe is greater than the parabolic distance of the outside rainwater in the rainwater inlet pipe.

[0015] The beneficial effects of this utility model are: 1. By connecting two spaced sewage well chambers through a connecting pipe, the sewage in the sewage well chambers is distributed, thereby increasing the space that a single sewage well chamber can accommodate. At the same time, sewage can also be discharged from the sewage outlet pipe of the other sewage well chamber, thus increasing the drainage volume and playing the role of emergency sewage discharge. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the confluence well of this utility model.

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of the confluence well of this utility model.

[0018] Figure 3 This is a cross-sectional three-dimensional structural diagram of the connecting pipe of this utility model.

[0019] The markings in the attached diagram are: 1. Manifold; 2. Sewage well chamber; 21. Sewage inlet pipe; 22. Sewage outlet pipe; 3. Rainwater well chamber; 31. Rainwater inlet pipe; 32. Rainwater outlet pipe; 4. Connecting pipe; 41. Connection pipe; 42. Check valve. Detailed Implementation

[0020] The following is for reference only. Figure 1 - Appendix Figure 3 The embodiments of this utility model will be described.

[0021] Example 1: As the single sewage manhole 2 collects sewage from the area for extended periods, suspended solids carried in the sewage will form a silt layer at the bottom of the manhole 2, reducing its actual water storage capacity. Simultaneously, the suspended solids can cause pipe blockage, reducing the drainage capacity of the sewage outlet pipe 22. This limits both the volume and drainage capacity of the sewage manhole 2. Therefore, currently, vacuum trucks are typically used to periodically remove the silt layer from the sewage manhole 2 to restore its water storage capacity and drainage capacity. However, these manholes generally have a warning water level and a reserve emergency water level between the warning level and the actual overflow level. When the sewage inflow is at a normal level, this reserve emergency water level provides sufficient time for the vacuum truck to arrive and remove the silt layer. However, the problem is that during peak sewage discharge periods, when the sewage inflow exceeds normal levels, the sewage may exceed the warning water level or even overflow before the next vacuum truck cycle. If the problem is only discovered after the sewage has overflowed, and a sewage suction truck is notified to remove it, by then the sewage overflow has often already caused environmental pollution, which has a negative impact on the living environment of the surrounding residents and the overall sanitation of the city.

[0022] Therefore, this utility model proposes a stormwater and sewage diversion junction structure in an old urban area, including: a junction 1, a drainage component and an emergency component; the junction 1 is composed of sewage well chambers 2 on both sides and a stormwater well chamber 3 in the middle; each well chamber is provided with an interface connected to water supply and drainage pipes, and the drainage component is connected to the interface of each well chamber; the emergency component is located in the stormwater well chamber 3, and the emergency component includes a connecting pipe 4, which runs through the stormwater well chamber 3 and connects to the sewage well chambers 2 on both sides respectively. Through the connection of the connecting pipe 4 with the sewage well chambers 2 on both sides, the sewage well chambers (2) on both sides become emergency expansion wells for each other; wherein the connecting pipe 4 is a steel pipe with good anti-seepage properties. The two spaced sewage well chambers 2 are connected through the connecting pipe 4, and the sewage in the sewage well chamber 2 is distributed, so that the space that a single sewage well chamber 2 can accommodate is increased in a disguised way. At the same time, the sewage can also be drained by the sewage outlet pipe 22 of the other sewage well chamber 2, so the drainage volume is also increased in a disguised way, which plays the role of emergency sewage discharge.

[0023] Considering the possibility of sewage backflow and the potential blockage of downstream pipes by suspended solids in the sewage, the sewage inlet pipe 21 is fixed and extends through the upper part of the sewage chambers 2 on both sides of the manifold 1. The height of the sewage inlet pipe 21 is higher than that of the connecting pipe 4. The end of the sewage inlet pipe 21 furthest from the sewage chamber 2 connects to the external sewage collection pipe. To form a sedimentation tank to filter some of the floating debris and reduce suspended solids, the sewage outlet pipe 22 extends through one side of the sewage chambers 2 on both sides of the manifold 1, specifically on the opposite side of the connecting pipe 4, at a height of one-third of the height of the sewage chamber 2. The end of the sewage outlet pipe 22 furthest from the sewage chamber 2 connects to the external main sewage pipeline. Furthermore, to ensure the normal flow of the sewage outlet pipe 22, it is typically... An existing filtration device will be installed to protect the sewage outlet pipe 22. This filtration device can be a bar screen, which is a commonly used method. As for cleaning, a vacuum truck will be used to remove the suspended particles intercepted by the bar screen. Therefore, the sewage in the single sewage well chamber 2 falls from the sewage inlet pipe 21 into the sewage well chamber 2 and settles to the bottom. When the water volume in the sewage well chamber 2 reaches a certain height, it will be discharged through the sewage outlet pipe 22. Before being discharged through the sewage outlet pipe 22, it will be filtered by an external filtration device. The rainwater pipeline is located on the same side as the sewage inlet pipe 21. The rainwater pipeline includes a rainwater inlet pipe 31 and a rainwater outlet pipe 32. The rainwater inlet pipe 31 is located in the rainwater well chamber 3 at a height slightly higher than the sewage inlet pipe 21, while the rainwater outlet pipe 32 is located in the rainwater well chamber 3 at a height slightly higher than the sewage outlet level.

[0024] In an emergency, any sewage well chamber 2 exceeding the height of the connecting pipe 4 will flow into another sewage well chamber 2 through the connecting pipe 4, thus distributing the sewage that is about to overflow from a single sewage well chamber 2. However, since the water level is parallel to the connecting pipe 4 at this time, it is about to reach the outlet, so the sewage that has just been discharged cannot settle and will quickly flow into another sewage well chamber 2 at a lower level through the connecting pipe 4. The suspended solids contained in the sewage that has just been discharged will adhere to the wall of the connecting pipe 4. Therefore, when the water level drops, the suspended solids will remain in the connecting pipe 4. As they accumulate, the connecting pipe 4 will also become blocked, making it impossible to distribute the sewage in the single sewage well chamber 2 in an emergency. Therefore, this embodiment proposes that the specific structure of the connecting pipe 4 is arched, with a triangular structure inside and both ends sloping from top to bottom. This sloping can reduce the retention of suspended solids when the water level recedes and also increase the flushing force of the water flow, reducing the retention of sediment.

[0025] Because domestic sewage and rainwater are treated differently, they require different treatment methods, resulting in their drainage pipes not being in the same drainage system. Rainwater well 3 is usually discharged directly into the river, while sewage needs to be treated in a sewage treatment plant. Therefore, the two cannot be connected. When the confluence well 1 was initially built in the old city, rainwater and sewage were treated simultaneously in the sewage treatment plant. With the development of technology, rainwater and sewage separation was started. After the separation of rainwater and sewage, the sewage pressure required for treatment in the sewage treatment plant decreased. If the old city encounters heavy rain, the rainwater in its old drainage system and rainwater well 3 is prone to overflow. Since the drainage pipes for water and rainwater are not in the same drainage system, this embodiment proposes to discharge rainwater into the sewage drainage system when it is about to overflow, in order to alleviate the pressure on the rainwater drainage system under heavy rain conditions. After the heavy rain subsides, rainwater well 3 will gradually return to normal.

[0026] Therefore, this embodiment proposes a connecting pipe 41 and a one-way valve 42. The connecting pipe 41 is welded to the middle of the connecting pipe 4 and is connected. The height of the connecting pipe 41 is lower than that of the rainwater inlet pipe 31. The highest point of the connecting pipe 41 and the lowest point of the rainwater inlet pipe 31 are at the same horizontal line. Specifically, the rainwater inlet pipe 31 and the connecting pipe 4 maintain a certain distance. This distance is greater than the maximum parabolic curve of the rainwater along the rainwater inlet pipe 31, so that the rainwater in the rainwater inlet pipe 31 will not fall directly into the connecting pipe 41 and the one-way valve 42. The connecting pipe 41 and the connecting pipe 4 are connected to form an inverted T-shaped channel, so that in the special case of heavy rain in the old city, the rainwater about to overflow from the rainwater well chamber 3 can be introduced into the sewage well chamber 2, and the two sewage well chambers can be connected to the sewage well chamber 2. Well 2 is used to divert rainwater from well 3 that is about to overflow. At the same time, the one-way valve 42 allows rainwater to enter the connecting pipe 4 for emergency drainage, making well 2 a rainwater emergency expansion well. Under the action of the one-way valve 42, sewage cannot flow into well 3 through the connecting pipe 4, thus avoiding the mixing of rainwater and sewage. At the same time, the rainwater washes away the suspended matter attached to the connecting pipe 4, achieving the purpose of cleaning. However, the accumulation of suspended matter attached to the connecting pipe 4, causing blockage, heavy rain, or premature blockage due to excessive suspended matter in a certain area are all special probability situations. Therefore, the emergency components of the confluence well 1 will not have any effect under normal use, and will only play an emergency role under special probability situations.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A stormwater and sewage separation manhole structure for old urban areas, characterized in that, It includes a manifold (1), a drainage component and an emergency component; the manifold consists of two sewage well chambers (2) on both sides and a central rainwater well chamber (3); each well chamber is provided with an interface for connecting water supply and drainage pipes, and the drainage component is connected to the interface of each well chamber; the emergency component is located in the rainwater well chamber (3), and the emergency component includes a connecting pipe (4), which runs across the two ends of the rainwater well chamber (3) and connects to the two sewage well chambers (2) on both sides respectively. Through the connection of the connecting pipe (4) with the two sewage well chambers (2) on both sides, the two sewage well chambers (2) on both sides become emergency expansion wells for each other.

2. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 1, characterized in that, The connecting pipe (4) has an arched structure with a triangular internal structure. The two ends are from high to low. The internal structure of the connecting pipe (4) reduces the retention of suspended matter.

3. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 2, characterized in that, The emergency component also includes a connecting pipe (41), which is located in the middle of the connecting pipe (4) and is connected to it. The highest point of the connecting pipe (41) is on the same plane as the lowest point of the rainwater inlet pipe (31) in the rainwater pipeline.

4. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 3, characterized in that, The emergency component also includes a one-way valve (42), which is located within the diameter of the connecting pipe (41). The one-way valve (42) controls the flow of high-level rainwater from the middle rainwater chamber (3) of the confluence well (1) to the connecting pipe (4), so that the sewage chamber (2) can be used as an emergency expansion well for rainwater.

5. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 3, characterized in that, It also includes a sewage pipeline, which includes a sewage inlet pipe (21) and a sewage outlet pipe (22). The sewage pipeline is arranged symmetrically. The sewage inlet pipe (21) is located on one side of the sewage well chamber (2) of the manifold (1). The height of the sewage inlet pipe (21) is higher than that of the connecting pipe (4).

6. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 5, characterized in that, The diameter of the sewage outlet pipe (22) is larger than the diameter of the sewage inlet pipe (21).

7. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 5, characterized in that, The sewage outlet pipe (22) is located on the opposite side of the connecting pipe (4), and the height of the sewage outlet pipe (22) is set at one-third of the longitudinal depth of the sewage well chamber (2) of the confluence well (1).

8. The structure of a stormwater and sewage separation and collection well in an old urban area according to claim 5, characterized in that, The rainwater pipeline includes a rainwater inlet pipe (31) and a rainwater outlet pipe (32). The rainwater pipeline is located in the rainwater well chamber (3) of the manifold (1) and is on the same side as the sewage inlet pipe (21).

9. The structure of a stormwater and sewage diversion junction in an old urban area according to claim 8, characterized in that, The connecting pipe (4) runs horizontally through the middle of the rainwater well chamber (3) of the confluence well (1), and the distance between the connecting pipe (4) and the rainwater inlet pipe (31) is greater than the parabolic distance of the outside rainwater in the rainwater inlet pipe (31).

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