Sponge city rainwater regulation and storage system
By designing diversion wells and partition walls in the sponge urban rainwater regulating and storage system, when the rainfall is high, the rainwater flows directly into the drainage pipeline network through the drainage holes, which solves the problem of slow rainwater discharge speed in the existing system during the overrecurrence period, and achieves rapid drainage and avoids water accumulation on the site.
Patent Information
- Application Number
- CN202422176547.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The existing sponge urban rainwater regulating and storage system discharges slowly during the rainwater during the super recurrence period, resulting in water accumulation on the site.
A sponge urban rainwater regulating and storage system was designed, including a rainwater collection pipeline network, diversion well, reservoir and drainage pipeline network. A partition wall is provided in the diversion well, which separates the inner cavity of the well body into the first diversion cavity and the second diversion cavity. When the rainfall is small, rainwater flows into the reservoir through the diversion cavity. When the rainfall is large, rainwater flows directly into the drainage pipe network through the drainage hole.
By shortening the rainwater drainage path, the discharge speed of rainwater during the super recurrence period is improved, and water accumulation in the site is avoided.
Smart Images
Figure CN223017773U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sponge cities, in particular to a rainwater storage and regulation system for sponge cities. Background Art
[0002] The existing rainwater storage and regulation system for sponge cities includes a reservoir, a site rainwater collection pipe network and a drainage pipe network. Among them, the rainwater runoff on the hardened ground of the site is first led to sponge facilities such as sunken green spaces, rain gardens, grassed swales, and permeable rainwater inlets within the site. The site rainwater collection pipe network is used to collect the rainwater overflowed from sponge facilities such as sunken green spaces, rain gardens, grassed swales, and permeable rainwater inlets within the site. The water outlet of the site rainwater collection pipe network is connected to the reservoir, and the collected rainwater flows into the reservoir. An overflow port is provided at the upper part of the reservoir, and the overflow port is connected to the drainage pipe network. After the reservoir is filled with rainwater, the subsequent rainwater flowing into the reservoir flows into the drainage pipe network through the overflow port, realizing the discharge of rainwater. When rainwater with a recurrence period exceeding the design value occurs, a large amount of rainwater needs to first flow into the reservoir and then enter the drainage pipe network through the overflow of the reservoir, resulting in a slow discharge speed of the rainwater with a recurrence period exceeding the design value and causing waterlogging in the site. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is that in the existing rainwater storage and regulation system for sponge cities, when rainwater with a recurrence period exceeding the design value occurs, a large amount of rainwater needs to first flow into the reservoir and then enter the drainage pipe network through the overflow of the reservoir, resulting in a slow discharge speed of the rainwater with a recurrence period exceeding the design value and causing waterlogging in the site.
[0004] To solve the above technical problem, the utility model provides a rainwater storage and regulation system for sponge cities, which includes a rainwater collection pipe network, a diversion well, a reservoir and a drainage pipe network; the diversion well includes a well body and a partition wall arranged in the well body. The partition wall divides the inner cavity of the well body into a first diversion cavity and a second diversion cavity. A first diversion hole communicating the first diversion cavity and the second diversion cavity is provided at the lower part of the partition wall. An inlet hole communicating the rainwater collection pipe network and a drainage hole communicating the drainage pipe network are provided on the cavity wall of the first diversion cavity. A second diversion hole communicating the reservoir is provided on the cavity wall of the second diversion cavity. The drainage hole is higher than the first diversion hole and the second diversion hole.
[0005] As a preferred solution, an overflow hole is provided at the upper part of the reservoir, and the overflow hole is connected to the drainage pipe network.
[0006] As a preferred solution, the upper end of the partition wall is higher than the inlet hole and the drainage hole.
[0007] As a preferred solution, a top plate is provided at the top of the well body, and the top plate and the partition wall are arranged at an interval up and down.
[0008] As a preferred solution, a manhole is provided on the top plate.
[0009] As a preferred solution, the water inlet hole and the drain hole are arranged at relative intervals.
[0010] As a preferred solution, the cross-sectional area of the second diversion hole is larger than that of the first diversion hole.
[0011] As a preferred solution, the first diversion hole is a rectangular hole.
[0012] As a preferred solution, the cross-sectional dimensions of the first diversion hole are 400mm * 100mm.
[0013] As a preferred solution, the drainage pipe network is a municipal rainwater pipe network.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] The rainwater storage and regulation system for sponge city of the present utility model includes a rainwater collection pipe network, a diversion well, a water storage tank and a drainage pipe network; the diversion well includes a well body and a partition wall arranged in the well body, the partition wall divides the inner cavity of the well body into a first diversion cavity and a second diversion cavity, a first diversion hole communicating the first diversion cavity and the second diversion cavity is provided at the lower part of the partition wall, a water inlet hole communicating the rainwater collection pipe network and a drain hole communicating the drainage pipe network are provided on the cavity wall of the first diversion cavity, a second diversion hole communicating the water storage tank is provided on the cavity wall of the second diversion cavity, and the drain hole is higher than the first diversion hole and the second diversion hole; when the rainfall is small, the rainwater in the rainwater collection pipe network flows into the first diversion cavity through the water inlet hole, then flows into the second diversion cavity through the first diversion hole, and finally flows into the water storage tank through the second diversion hole, ensuring water storage when the rainfall is small; when the rainfall is large, the rainwater flowing into the first diversion cavity cannot quickly flow into the water storage tank through the first diversion hole and the second diversion hole, the rainwater liquid level in the first diversion cavity rises, and after the liquid level rises to the position of the drain hole, the rainwater in the first diversion cavity can directly flow into the drainage pipe network through the drain hole. Compared with flowing into the water storage tank first and then overflowing through the water storage tank into the drainage pipe network, for the rainwater storage and regulation system for sponge city of the present utility model, the rainwater in the first diversion cavity directly flows into the drainage pipe network through the drain hole, shortening the length of the drainage path, accelerating the discharge speed of rainwater with a return period exceeding the design value, and avoiding site waterlogging. Description of the Drawings
[0016] Figure 1 is a flow chart of the rainwater storage and regulation system for sponge city of the present utility model;
[0017] Figure 2 is a structural schematic diagram of the diversion well;
[0018] Figure 3 is Figure 2 the sectional view taken along the A-A direction in
[0019] In the figure, 1 is a rainwater collection pipe network, 2 is a flow splitting well, 21 is a flow separation wall, 211 is a first flow splitting hole, 22 is a first flow splitting chamber, 221 is a water inlet hole, 222 is a drain hole, 23 is a second flow splitting chamber, 231 is a second flow splitting hole, 24 is a top plate, 241 is a manhole, 3 is a reservoir, and 4 is a drain pipe network. Specific embodiments
[0020] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.
[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.
[0022] Such as Figures 1 to 3As shown in the figure, a preferred embodiment of a sponge city rainwater storage and regulation system of the present utility model includes a rainwater collection pipe network 1, a diversion well 2, a reservoir 3 and a drainage pipe network 4; the diversion well 2 includes a well body and a partition wall 21 arranged in the well body. The partition wall 21 divides the inner cavity of the well body into a first diversion cavity 22 and a second diversion cavity 23. A first diversion hole 211 communicating the first diversion cavity 22 and the second diversion cavity 23 is provided at the lower part of the partition wall 21. An inlet hole 221 communicating with the rainwater collection pipe network 1 and a drainage hole 222 communicating with the drainage pipe network 4 are provided on the cavity wall of the first diversion cavity 22. A second diversion hole 231 communicating with the reservoir 3 is provided on the cavity wall of the second diversion cavity 23. The drainage hole 222 is higher than the first diversion hole 211 and the second diversion hole 231. When the rainfall is small, the rainwater in the rainwater collection pipe network 1 flows into the first diversion cavity 22 through the inlet hole 221. The rainwater flowing into the first diversion cavity 22 flows into the second diversion cavity 23 through the first diversion hole 211. The rainwater flowing into the second diversion cavity 23 finally flows into the reservoir 3 through the second diversion hole 231, ensuring that the reservoir 3 can store water when the rainwater is less. When the rainfall is large, the flow rate of the rainwater flowing into the first diversion cavity 22 is large, and the liquid level of the rainwater in the first diversion cavity 22 rises rapidly. At this time, the rainwater in the first diversion cavity 22 can directly flow into the drainage pipe network 4 through the drainage hole 222, accelerating the discharge speed of the rainwater with a return period exceeding the design value. Therefore, the sponge city rainwater storage and regulation system of the present utility model can accelerate the discharge of the rainwater with a return period exceeding the design value in the site and avoid waterlogging in the site.
[0023] Among them, an overflow hole is provided at the upper part of the reservoir 3, and the overflow hole is communicated with the drainage pipe network 4. After the reservoir 3 is filled with rainwater, the subsequent rainwater entering the reservoir 3 can flow into the drainage pipe network 4 through the overflow hole, further ensuring the smooth external discharge of the rainwater with a return period exceeding the design value.
[0024] In this embodiment, the upper end of the flow partition wall 21 is higher than the water inlet hole 221 and the drain hole 222. The top of the well body is provided with a top plate 24, and the top plate 24 and the flow partition wall 21 are arranged at an interval up and down. When the rainfall is small, the rainwater liquid level in the first diversion cavity 22 is lower than the drain hole 222. At this time, the rainwater in the first diversion cavity 22 can only flow into the second diversion cavity 23 through the first diversion hole 211, and then flow into the reservoir 3 through the second diversion hole 231. When the rainfall is large and the rainwater liquid level in the first diversion cavity 22 is higher than the drain hole 222 and lower than the upper end face of the flow partition wall 21, a part of the rainwater in the first diversion wall is discharged into the drainage pipe network 4 through the drain hole 222, and the other part is discharged to the reservoir 3 through the first diversion hole 211, which not only ensures that a part of the rainwater can be quickly discharged into the drainage pipe network 4, but also ensures that the other part of the rainwater can flow into the reservoir 3, realizing the further collection of rainwater. Since the cross-sectional area of the first diversion hole 211 is smaller than that of the second diversion hole 231, before the reservoir 3 is full of water, the rainwater flowing from the first diversion hole 211 into the second diversion cavity 23 can be quickly discharged into the reservoir 3. At this time, the rainwater flow rate flowing into the reservoir 3 is mainly determined by the cross-sectional area of the first diversion hole 211. When the rainfall is very large, the rainwater liquid level in the first diversion cavity 22 reaches the upper end face of the flow partition wall 21, and the rainwater in the first diversion cavity 22 can overflow into the second diversion cavity 23 in large quantities through the upper end of the flow partition wall 21. The rainwater in the second diversion cavity 23 increases. Since the cross-sectional area of the second diversion hole 231 is larger than that of the first diversion hole 211, the rainwater overflowing into the second diversion cavity 23 can quickly flow into the reservoir 3 through the second diversion hole 231. At this time, the rainwater flow rate flowing into the reservoir 3 is mainly determined by the cross-sectional area of the second diversion hole 231. At this time, the rainwater flow rate flowing into the reservoir 3 and overflowing into the drainage pipe network 4 through the rainwater pool, as well as the rainwater flow rate directly flowing into the drainage pipe network 4 through the drain hole 222 are both large. Discharging the rainwater into the drainage pipe network 4 through the drain hole 222 shortens the length of the rainwater drainage path compared with first discharging the rainwater into the reservoir 3 and then overflowing the rainwater in the reservoir 3 into the drainage pipe network 4, thereby shortening the drainage time and ensuring the quick external discharge of rainwater with a return period exceeding the design value.
[0025] In this embodiment, the water inlet hole 221 and the drain hole 222 are arranged at intervals relative to each other. The rainwater flowing into the first diversion cavity 22 from the water inlet hole 221 can quickly flow into the drain hole 222 without flowing around in the first diversion cavity 22, reducing the flow resistance of the rainwater flowing into the drain hole 222 in the first diversion cavity 22 and further ensuring the quick external discharge of rainwater with a return period exceeding the design value.
[0026] In this embodiment, the flow partition wall 21 is made of concrete masonry. The thickness of the flow partition wall 21 is 200 mm. To facilitate the formation of the first diversion hole 211, in this embodiment, the first diversion hole 211 is a rectangular hole. Calculated according to the overflow weir drainage formula, the width of the first diversion hole 211 is 400 mm and the height is 100 mm. The flow rate of the first diversion hole 211 can basically meet the runoff requirements in case of relatively small rainfall. By controlling the cross-sectional area of the first diversion hole 211, in case of relatively large rainfall, the flow rate of the rainwater in the first diversion chamber 22 flowing into the second diversion chamber 23 can be controlled, ensuring that the relatively large rainfall exceeding the recurrence period can be quickly discharged into the drainage pipe network 4 through the drain outlet; and it can also ensure that the rainwater within the recurrence period can smoothly flow into the water storage tank 3; and in case of extremely large rainfall, the rainwater exceeding the recurrence period can be discharged to the drainage pipe network 4 through the drain outlet and the overflow of the water storage tank 3 in the way of overflowing through the partition chamber.
[0027] For the convenience of maintenance, in this embodiment, the top plate 24 is provided with a manhole 241, and the upper end of the manhole 241 is covered with an end cover. Among them, the drainage pipe network 4 is a municipal rainwater pipe network, and the municipal rainwater pipe network is connected with a branch pipe, and the branch pipe is communicated with the water storage tank 3. The rainwater collection pipe network 1 includes a collecting pipe network arranged in the site. The rainwater collection pipe network 1 can collect the overflow rainwater after the rainwater runoff on the hardened ground of the site enters the sunken green space, rain garden, grassed swale, and permeable rainwater inlet.
[0028] In summary, the sponge city rainwater storage and regulation system of the present utility model includes a rainwater collection pipe network 1, a diversion well 2, a water storage tank 3, and a drainage pipe network 4; the diversion well 2 includes a well body and a flow partition wall 21 arranged in the well body. The flow partition wall 21 divides the inner cavity of the well body into a first diversion chamber 22 and a second diversion chamber 23. The lower part of the flow partition wall 21 is provided with a first diversion hole 211 communicating the first diversion chamber 22 and the second diversion chamber 23. The cavity wall of the first diversion chamber 22 is provided with a water inlet hole 221 communicating with the rainwater collection pipe network 1 and a drain hole 222 communicating with the drainage pipe network 4. The cavity wall of the second diversion chamber 23 is provided with a second diversion hole 231 communicating with the water storage tank 3. The drain hole 222 is higher than the first diversion hole 211 and the second diversion hole 231; in case of relatively small rainfall, the rainwater in the rainwater collection pipe network 1 flows into the first diversion chamber 22 through the water inlet hole 221, and then flows into the second diversion chamber 23 through the first diversion hole 211, and finally flows into the water storage tank 3 through the second diversion hole 231, ensuring the water storage in case of relatively small rainfall; in case of relatively large rainfall, the rainwater flowing into the first diversion chamber 22 cannot quickly flow into the water storage tank 3 through the first diversion hole 211 and the second diversion hole 231. The liquid level of the rainwater in the first diversion chamber 22 rises and flows into the drainage pipe network 4 through the drain hole 222, accelerating the discharge speed of the rainwater exceeding the recurrence period and avoiding waterlogging in the site.
[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.
Claims
1. A sponge city rainwater storage system, characterized in that: The invention comprises a rainwater collection pipe network (1), a diversion well (2), a water storage tank (3) and a drainage pipe network (4); the diversion well (2) comprises a well body and a flow partition wall (21) arranged in the well body; the flow partition wall (21) divides the inner cavity of the well body into a first diversion cavity (22) and a second diversion cavity (23); a first diversion hole (211) connecting the first diversion cavity (22) and the second diversion cavity (23) is provided at the lower part of the flow partition wall (21); a water inlet hole (221) connecting the rainwater collection pipe network (1) and a drainage hole (222) connecting the drainage pipe network (4) are provided on the wall of the first diversion cavity (22); a second diversion hole (231) connecting the water storage tank (3) is provided on the wall of the second diversion cavity (23); the drainage hole (222) is higher than the first diversion hole (211) and the second diversion hole (231).
2. The sponge city rainwater storage system according to claim 1 is characterized in that: An overflow hole is provided at the upper portion of the water storage tank (3), and the overflow hole is connected to the drainage pipe network (4).
3. The sponge city rainwater storage system according to claim 1 is characterized in that: The upper end of the flow isolation wall (21) is higher than the water inlet hole (221) and the drainage hole (222).
4. The sponge city rainwater storage system according to claim 1 is characterized in that: A top plate (24) is provided on the top of the well body, and the top plate (24) and the flow isolation wall (21) are arranged vertically and spaced apart.
5. The sponge city rainwater storage system according to claim 4 is characterized in that: The top plate (24) is provided with a manhole (241).
6. The sponge city rainwater storage system according to claim 1 is characterized in that: The water inlet hole (221) and the drainage hole (222) are arranged relatively spaced apart.
7. The sponge city rainwater storage system according to claim 1 is characterized in that: The cross-sectional area of the second flow diversion hole (231) is greater than the cross-sectional area of the first flow diversion hole (211).
8. The sponge city rainwater storage system according to claim 1 is characterized in that: The first diversion hole (211) is a rectangular hole.
9. The sponge city rainwater storage system according to claim 1 is characterized in that: The cross-sectional size of the first diversion hole (211) is 400 mm*100 mm.
10. The sponge city rainwater storage system according to claim 1, characterized in that: The drainage pipe network (4) is a municipal rainwater pipe network.