Municipal rainwater storage device

Abstract

The utility model particularly relates to a municipal rainwater storage device which is characterized in that a water storage tank comprises a water outlet pipe communicated with a municipal pipe network, and a multi-stage filtering structure is arranged in the water storage tank; the multi-stage filtering structure comprises a first filtering plate and a second filtering plate, the first filtering plate and the second filtering plate are obliquely arranged in an inner cavity of the water storage tank, and the water outlet pipe is arranged on the side, higher than the connecting end of the water storage tank, of the first filtering plate and the second filtering plate; the water storage tank is connected with a sludge storage tank for storing sludge on the lower side of the connecting ends of the first filter plate and the second filter plate with the water storage tank; an emergency drain valve is arranged at the joint of the emergency drain pipe and the water storage tank. A multi-stage filtering structure is arranged in the water storage tank, impurities and small-particle substances in rainwater are filtered through the first filtering plate and the second filtering plate, the rainwater stands in the water storage tank, the clear rainwater after standing is discharged into a rainwater pipeline of a municipal pipe network through the water outlet pipe 2, and the pressure of follow-up water treatment is relieved.

Description

Technical Field

[0001] This utility model relates to the field of road rainwater harvesting technology, specifically a municipal rainwater storage device. Background Technology

[0002] During heavy rainstorms, the rapid flow of large amounts of water quickly pushes drainage networks to their limits, making it difficult to drain accumulated water in time. Rainwater washes away road surfaces, carrying mud, sand, and debris, further increasing drainage pressure. Inadequate or aging drainage systems can easily lead to blockages, further reducing drainage efficiency. Therefore, cities need to strengthen their drainage systems and improve their ability to cope with extreme weather. This is why we need municipal stormwater storage devices to alleviate the pressure on urban drainage systems during heavy rainstorms.

[0003] Patent application number CN202322178624.X discloses a water storage device for modular facilities on sidewalks in sponge cities. The device includes a water storage tank positioned directly beneath the sidewalk. The tank contains a sludge-removing structure, and its upper surface has several water-collecting holes for rainwater drainage. A drainage pipe for removing silt and scale is located at the lower part of the tank, on its outer side. This invention utilizes a sludge-removing structure and a reversible motor-driven screw to move a sludge-removing plate back and forth, enabling rapid movement and effective cleaning of silt and scale from the water storage device beneath the sidewalk. This maintains the water storage capacity, improves drainage efficiency, and prevents blockages and water accumulation. However, although this utility model improves drainage efficiency, the initial rainwater has a high content of pollutants and water pollution due to the scouring of the road surface during the process of flowing into the rainwater pipe. It cannot be directly discharged into the municipal pipe network and usually needs to be treated, which increases the pressure on the pre-treatment system of the municipal pipe network. Therefore, we hope that the water storage device can temporarily store water for pre-filtration and sedimentation before being discharged into the city pipe network, thereby reducing the pressure on subsequent water treatment.

[0004] ‌ Utility Model Content

[0005] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a municipal rainwater storage device, which incorporates a filtration system and adds a filter to the drainage pipe.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A municipal rainwater storage device includes a water storage tank located below the intersection of a sidewalk and a non-motorized vehicle lane, the water storage tank including an outlet pipe connected to the municipal water supply network.

[0008] The water storage tank is equipped with an openable and closable filter cover on top, and the water storage tank is equipped with a multi-stage filtration structure inside.

[0009] The multi-stage filtration structure includes a first filter plate and a second filter plate. The first filter plate and the second filter plate are respectively inclinedly arranged in the inner cavity of the water storage tank. The water outlet pipe is located on the higher side of the connection end between the first filter plate and the second filter plate and the water storage tank.

[0010] The water storage tank has a sludge storage tank connected to the lower side of the connection end between the first filter plate and the second filter plate and the water storage tank. The sludge storage tank is equipped with an openable and closable cover.

[0011] The water storage tank is provided with multiple sewage outlets, and the sewage storage tank is provided with a sewage inlet corresponding to each sewage outlet.

[0012] An emergency drain pipe connected to the outlet pipe is provided below the outlet pipe. An emergency drain valve is provided at the connection between the emergency drain pipe and the water storage tank. When the water pressure stored in the water storage tank is greater than the preset emergency drain water pressure value, the emergency drain valve opens, and the water stored in the water storage tank is discharged from both the outlet pipe and the emergency drain pipe.

[0013] As a preferred embodiment of the present invention, the aperture of the filter holes on the first filter plate is larger than that on the second filter plate, the water outlet pipe is located below the second filter plate, and the highest point of the inner cavity of the water outlet pipe is lower than the lowest point where the second filter plate connects to the water storage tank.

[0014] As a preferred embodiment of the present invention, the emergency drain valve includes a sleeve, a partition hopper, a valve ball, an end drain plate, and a spring. One end of the partition hopper is located close to the inner cavity of the water storage tank, and the other end of the partition hopper is provided with a pressure valve port. The valve ball blocks the pressure valve port, and the valve ball and the end drain plate are connected by the spring.

[0015] As a preferred embodiment of the present invention, the inner diameter of the pressure valve port is smaller than the outer diameter of the valve ball.

[0016] As a preferred embodiment of the present invention, the valve ball is fixedly connected to the movable rod, the end of the fixed rod is connected to the end drain plate, the fixed rod is sleeved on the outer periphery of the movable rod, and the spring is wrapped around and connected to the integral formed by the fixed rod and the movable rod.

[0017] As a preferred embodiment of the present invention, the end drain plate is provided with multiple water outlet holes.

[0018] As a preferred embodiment of the present invention, the bottom plate of the water storage tank is inclined and the height of the sewage outlet near the bottom gradually decreases.

[0019] As a preferred embodiment of the present invention, both the first filter plate and the second filter plate are provided with downwardly protruding connecting protrusions at the connection points with the water storage tank, and the water storage tank is provided with a connecting platform with a groove corresponding to the connecting protrusions.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. By setting up a multi-stage filtration structure in the water storage tank, impurities and small particulate matter in the rainwater are filtered through the first and second filter plates. The rainwater is left to stand in the water storage tank. After standing, the clearer rainwater is discharged into the rainwater pipe of the municipal pipe network through the outlet pipe 2, reducing the pressure on subsequent water treatment.

[0022] 2. Install a sludge storage tank connected to the water storage tank. Filtered impurities or settled silt can enter the sludge storage tank. During heavy rain, the sludge storage tank will not only store sludge but also serve as a temporary water storage tank to alleviate flooding.

[0023] 3. During heavy rain, if the water storage tank only drains through the outlet pipe, and there is insufficient drainage, rainwater will overflow the storage device, causing road flooding. When the rainwater in storage tank 1 accumulates to exceed the preset emergency drainage capacity, the pressure of the water rushing towards the emergency drain valve 11 exceeds the force exerted by the spring on the valve ball blocking the pressure valve port. The valve ball moves towards the end drain plate, opening the pressure valve port, and water is discharged from the end drain plate into the emergency drain pipe. Additionally, normally, when the rainwater volume in the storage tank is insufficient to reach the preset emergency drainage pressure (i.e., insufficient rainwater volume), the emergency drain valve is closed, and drainage only occurs through the outlet pipe. This does not affect the rainwater sedimentation process, ensuring that the water flowing into the municipal pipe network contains fewer impurities and sludge, reducing the pressure on subsequent water treatment in the municipal pipe network. Attached Figure Description

[0024] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0026] Figure 2 This is a top view of the present invention;

[0027] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0028] Figure 4 for Figure 3 A magnified view of the details at point B in the middle. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] See attached document Figure 1 To be continued Figure 4 As shown, a municipal rainwater storage device includes a water storage tank 1 located below the intersection of a sidewalk and a non-motorized vehicle lane. The water storage tank 1 includes an outlet pipe 2 connected to the municipal water supply network. During normal use, rainwater enters the water storage tank 1 through a filter cover 3 and is filtered through a multi-stage filtration structure to remove impurities and small particles. The rainwater then settles in the water storage tank 1, and the clearer rainwater is discharged into the municipal rainwater pipe network through the outlet pipe 2.

[0031] The water storage tank 1 has an openable filter cover 3 on top, allowing for cleaning of the inside of the tank after prolonged use. The tank 1 contains a multi-stage filtration system; the first filter plate 4 and the second filter plate 5 can also be removed for cleaning. The water storage tank 1 is also connected to a sludge storage tank 6, where filtered impurities or settled sludge can enter. The sludge storage tank 6 is cleaned later by opening the cover 7.

[0032] The multi-stage filtration structure includes a first filter plate 4 and a second filter plate 5. The first filter plate 4 and the second filter plate 5 are respectively inclinedly arranged in the inner cavity of the water storage tank 1. The water outlet pipe 2 is located on the higher side of the connection end between the first filter plate 4 and the second filter plate 5 and the water storage tank 1.

[0033] The water storage tank 1 is connected to a sludge storage tank 6 on the lower side of the connection end between the first filter plate 4 and the second filter plate 5 and the water storage tank 1. The sludge storage tank 6 is equipped with an openable and closable cover plate 7. At the same time, the addition of the sludge storage tank 6 also increases the total rainwater carrying capacity of the water storage device. In the event of heavy rain, the sludge storage tank 6 not only serves to store sludge, but also serves as a temporary water storage to alleviate waterlogging.

[0034] The water storage tank 1 is equipped with multiple sewage outlets 8, and the sewage storage tank 6 is equipped with a sewage inlet 9 corresponding to each sewage outlet 8.

[0035] An emergency drain pipe 10, connected to the outlet pipe 2, is located below the outlet pipe 2. An emergency drain valve 11 is located at the connection between the emergency drain pipe 10 and the water storage tank 1. When the water pressure stored in the water storage tank 1 exceeds the preset emergency drain pressure value, the emergency drain valve 11 opens, and the water stored in the water storage tank 1 is discharged from both the outlet pipe 2 and the emergency drain pipe 10. During heavy rain, if the water storage tank 1 is only drained through the outlet pipe 2, and there is insufficient time to drain the water, rainwater will overflow the water storage device, causing road flooding. When the rainwater in the water storage tank 1 accumulates to exceed the preset emergency drain volume, the pressure of the water in the water storage tank 1 rushing towards the emergency drain valve 11 is greater than the force exerted by the spring 16 on the valve ball 14 to block the pressure valve port 17. The valve ball 14 moves towards the end drain plate 15, the pressure valve port 17 is opened, and water is discharged from the end drain plate 15 into the emergency drain pipe 10.

[0036] In addition, when the amount of rainwater in the water storage tank 1 is insufficient to reach the preset emergency drainage pressure (i.e., the amount of rainwater is insufficient), the emergency drainage valve 11 is closed, and drainage is only carried out through the outlet pipe 2. This does not affect the rainwater sedimentation process, ensuring that the water flowing into the municipal pipe network contains less impurities and sludge, and reducing the pressure on the subsequent water treatment of the municipal pipe network.

[0037] Preferably, the diameter of the filter holes on the first filter plate 4 is larger than the diameter of the filter holes on the second filter plate 5, the water outlet pipe 2 is located below the second filter plate 5, and the highest point of the inner cavity of the water outlet pipe 2 is lower than the lowest point where the second filter plate 5 is connected to the water storage tank 1.

[0038] Preferably, the emergency drain valve 11 includes a sleeve 12, a dividing hopper 13, a valve ball 14, an end drain plate 15, and a spring 16. One end of the flared end of the dividing hopper 13 is located close to the inner cavity of the water storage tank 1, and the other end of the dividing hopper 13 is provided with a pressure valve port 17. The valve ball 14 blocks the pressure valve port 17, and the valve ball 14 and the end drain plate 15 are connected by the spring 16.

[0039] Preferably, the inner diameter of the pressure valve port 17 is smaller than the outer diameter of the valve ball 14.

[0040] Preferably, the valve ball 14 is fixedly connected to the movable rod 18, the end of the fixed rod 19 is connected to the end drain plate 15, the fixed rod 19 is sleeved on the outer periphery of the movable rod 18, and the spring 16 is wrapped and connected to the integral formed by the fixed rod 19 and the movable rod 18. By setting the fixed rod 19 and the movable rod 18, the movement direction of the valve ball 14 is restricted, and the spring 16 is also protected.

[0041] Preferably, the end drain plate 15 is provided with multiple water outlet holes 20.

[0042] Preferably, the bottom plate 21 of the water storage tank 1 is inclined and the height of the sewage outlet 8 near the bottom gradually decreases.

[0043] Preferably, the first filter plate 4 and the second filter plate 5 are both provided with downwardly protruding connecting protrusions 22 at the connection points with the water storage tank 1, and the water storage tank 1 is provided with a connecting platform 24 with a groove 23 corresponding to the connecting protrusions 22.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions 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 solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A municipal rainwater storage device, comprising a water storage tank (1) located below the intersection of a sidewalk and a non-motorized vehicle lane, wherein the water storage tank (1) includes an outlet pipe (2) connected to a municipal water supply network, characterized in that, The water storage tank (1) is provided with an openable and closable filter top cover (3) and the water storage tank (1) is provided with a multi-stage filtration structure inside; The multi-stage filtration structure includes a first filter plate (4) and a second filter plate (5). The first filter plate (4) and the second filter plate (5) are respectively inclinedly arranged in the inner cavity of the water storage tank (1). The water outlet pipe (2) is located on the higher side of the connection end between the first filter plate (4) and the second filter plate (5) and the water storage tank (1). The water storage tank (1) has a sludge storage tank (6) connected to the lower side of the connection end between the first filter plate (4) and the second filter plate (5) and the water storage tank (1). The sludge storage tank (6) is provided with an openable cover plate (7). The water storage tank (1) is provided with multiple sewage outlets (8), and the sewage storage tank (6) is provided with a sewage inlet (9) corresponding to the sewage outlets (8). Below the outlet pipe (2) is an emergency drain pipe (10) connected to the outlet pipe (2). An emergency drain valve (11) is provided at the connection between the emergency drain pipe (10) and the water storage tank (1). When the water pressure stored in the water storage tank (1) is greater than the preset emergency drain water pressure value, the emergency drain valve (11) opens, and the water stored in the water storage tank (1) is discharged from both the outlet pipe (2) and the emergency drain pipe (10).

2. A municipal rainwater storage device according to claim 1, characterized in that, The diameter of the filter holes on the first filter plate (4) is larger than the diameter of the filter holes on the second filter plate (5). The water outlet pipe (2) is located below the second filter plate (5), and the highest point of the inner cavity of the water outlet pipe (2) is lower than the lowest point where the second filter plate (5) connects to the water storage tank (1).

3. A municipal rainwater storage device according to claim 2, characterized in that, The emergency drain valve (11) includes a sleeve (12), a partition hopper (13), a valve ball (14), an end drain plate (15), and a spring (16). One end of the partition hopper (13) is located close to the inner cavity of the water storage tank (1), and the other end of the partition hopper (13) is provided with a pressure valve port (17). The valve ball (14) blocks the pressure valve port (17), and the valve ball (14) and the end drain plate (15) are connected by the spring (16).

4. A municipal rainwater storage device according to claim 3, characterized in that, The inner diameter of the pressure valve port (17) is smaller than the outer diameter of the valve ball (14).

5. A municipal rainwater storage device according to claim 3 or 4, characterized in that, The valve ball (14) is fixedly connected to the movable rod (18), the end of the fixed rod (19) is connected to the end drain plate (15), the fixed rod (19) is sleeved on the outer periphery of the movable rod (18), and the spring (16) is wrapped and connected to the integral formed by the fixed rod (19) and the movable rod (18).

6. A municipal rainwater storage device according to claim 3, characterized in that, The end drain plate (15) is provided with multiple water outlet holes (20).

7. A municipal rainwater storage device according to claim 1, characterized in that, The bottom plate (21) of the water storage tank (1) is inclined and the height of the sewage outlet (8) near the bottom gradually decreases.

8. A municipal rainwater storage device according to claim 1, characterized in that, The first filter plate (4) and the second filter plate (5) are both provided with downward protruding connecting protrusions (22) at the connection points with the water storage tank (1), and the water storage tank (1) is provided with a connecting platform (24) with a groove (23) corresponding to the connecting protrusions (22).

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