Delayed outflow device and drainage system

Abstract

The utility model relates to the technical field of drainage of sponge cities, in particular to a delayed outflow device and a drainage system, which comprise a box body used for accommodating and guiding water flow, an overflow port arranged at the top of the box body, and a water inlet arranged at the side part of the box body; the rainwater grate is located at the overflow opening in the top of the box body and used for intercepting large particles and preventing the large particles from entering a drainage system; the filtering structure is arranged at the water inlet of the box body and is used for primarily filtering water flow flowing into the box body; and the time-delay outflow plate is arranged at the water inlet of the box body and located on the inner side of the filtering structure, and a plurality of water leakage holes are formed in the time-delay outflow plate and used for controlling the drainage speed of water flow. The drainage time of surface accumulated water can be prolonged, so that timely drainage of the surface accumulated water is balanced, and sufficient precipitation time is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sponge city drainage, and in particular to a time-delayed outflow device and a drainage system. Background Art

[0002] Sponge city is a new generation of urban stormwater management concept. It means that the city can adapt to environmental changes and respond to natural disasters caused by rainwater like a sponge, and has good elasticity. It can also be called a "water-elastic city."

[0003] The core function of sponge city source reduction facilities is to effectively purify rainwater resources by utilizing the sedimentation of surface water storage areas and the filtration mechanism of soil media. Certain types of shallow surface retention and purification systems, such as sunken green spaces and rain gardens, although initially designed to improve rainwater treatment efficiency and water quality, often lead to soil media clogging due to long-term use or design limitations, thereby reducing the rainwater infiltration rate. This situation not only weakens the treatment efficiency of the facilities during rainfall, but also when the rainfall exceeds the design capacity of the facilities, the rainwater that is not treated in time may cause overflow risks, while also affecting the subsequent filtration and purification of the water flowing through, thereby slowing down the overall water quality optimization process.

[0004] Groundwater levels and facility construction challenges:

[0005] In certain geographic areas, high groundwater levels necessitate stricter backfill requirements for rain garden soil, a significant constraint in facility construction. Furthermore, for bottom drains that lack effective access to the surrounding drainage network, conventional sunken green spaces are the only alternative. However, ensuring rapid drainage of these green spaces while retaining surface water to prevent accumulation presents another pressing technical challenge.

[0006] Solution:

[0007] In response to the above problems, this application proposes a device for optimizing the emptying time control of sponge city source reduction facilities. Its core purpose is to balance the timely emptying of surface water and ensure sufficient sedimentation time, so as to take into account the prevention of mosquito and fly breeding, water volume management effect and water purification effect. After in-depth analysis, the recommended emptying time range should be controlled between 3 hours and 6 hours. This range can not only ensure the rapid removal of accumulated water and avoid mosquito and fly problems caused by long retention time, but also ensure sufficient sedimentation time to maximize the water purification effect. Especially in the face of limited soil infiltration conditions or the inability of internal water storage to be effectively emptied through the bottom blind pipe, the effective implementation of the emptying time control strategy becomes the key to solving key problems. Utility Model Content

[0008] The purpose of the utility model is to provide a delayed outflow device, which can prolong the emptying time of surface water to balance the timely emptying of surface water and ensure sufficient sedimentation time.

[0009] Another object of the present invention is to provide a drainage system that can extend the draining time of surface water to balance the timely draining of surface water and the guarantee of sufficient sedimentation time.

[0010] The technical solution of the present utility model is achieved as follows:

[0011] A time-delayed outflow device, applied to an overflow well, comprising:

[0012] The box body is used to contain and guide water flow, the top of the box body is provided with an overflow port, and the side of the box body is provided with a water inlet;

[0013] A rainwater grate, located at the overflow port on the top of the box, is used to intercept large particles and prevent them from entering the drainage system;

[0014] A filtering structure, provided at the water inlet of the box, for preliminarily filtering the water flowing into the box;

[0015] The delayed outflow plate is arranged at the water inlet of the box body and is located on the inner side of the filtering structure. The delayed outflow plate is provided with a plurality of water leakage holes for controlling the discharge speed of the water flow.

[0016] Furthermore, the filter structure includes at least one filter layer.

[0017] Furthermore, the filtering structure includes a filtering layer, and the filtering layer adopts a filtering grid or a filtering grate.

[0018] Furthermore, the filter layer is arranged on one side of the outer port of the water inlet and is fixed to the outer side wall of the box body by a plurality of bolts.

[0019] Furthermore, the filter layer includes a filter plate portion and a positioning plate portion, and the filter plate portion is connected to the positioning plate portion and is L-shaped;

[0020] The filter plate portion is attached to the outer side wall of the box body, and the positioning plate portion is attached to the top of the box body.

[0021] Furthermore, the surface of the delayed outflow plate is provided with an anti-rust layer, or the delayed outflow plate is made of galvanized steel plate;

[0022] The delayed outflow plate is arranged on one side of the inner port of the water inlet and is fixed to the inner wall of the box body by a plurality of bolts.

[0023] Furthermore, a slot is provided at the overflow port, and the rainwater grate is movably installed in the slot.

[0024] Furthermore, the box is in the shape of a cuboid.

[0025] A drainage system includes an overflow well and the delayed outflow device, wherein the delayed outflow device is arranged at the base of the overflow well.

[0026] Furthermore, the drainage system is an urban drainage system.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The present application provides a delayed outflow device for use in an overflow well, which can be installed on the overflow well base. Under normal rainfall conditions, the depth of rainwater gradually increases and gradually enters the delayed outflow plate through a filter structure. The filter structure has a filtering effect on larger impurities in the rainwater. After a period of sedimentation, the relatively clean rainwater gradually flows out through the small holes and enters the box from the leaking holes of the delayed outflow plate, and then enters the drainage system for discharge. Through this delayed outflow method, the emptying time of surface water is extended, thereby balancing the timely emptying of surface water and ensuring sufficient sedimentation time, so as to take into account the prevention of mosquito and fly breeding, water volume management effects, and water quality purification effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a structural diagram of the utility model's delayed outflow device installed on the base of the overflow well;

[0031] Figure 2 This is a schematic diagram of the structure in which the delayed outflow device of the utility model is separated from the base of the overflow well;

[0032] Figure 3 This is a structural diagram of the utility model in which the filter layer and the delayed outflow plate are installed at the water inlet;

[0033] Figure 4 This is a schematic diagram of the structure of the utility model without the filter layer and the delayed outflow plate installed;

[0034] Figure 5 This is a schematic diagram of the structure of the utility model without the rain grate installed;

[0035] Figure 6 This is a schematic diagram of the structure of the utility model without the rainwater grate and the filter layer installed;

[0036] Figure 7 This is a schematic diagram of the structure of the filter layer of the utility model;

[0037] Figure 8 This is a structural diagram of the delayed outflow plate of the utility model.

[0038] In the picture:

[0039] 1-Box; 2-Rainwater grate;

[0040] 3-filter layer; 301-filter plate portion; 302-positioning plate portion;

[0041] 4-delayed outflow plate; 5-card slot;

[0042] 6-first bolt hole; 7-first connecting bolt;

[0043] 8-second bolt hole; 9-second connecting bolt;

[0044] 10-base; 11-leakage hole. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0050] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0051] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0052] Example 1

[0053] This embodiment provides a delayed outflow device, which is applied to an overflow well and can be installed on the base 10 of the overflow well. The overflow well is a type of drainage inspection well, generally existing in an intercepting combined sewer system and an urban drainage engineering pump station system, and has the function of controlling the water flow rate.

[0054] Reference Figures 1-8 , the delayed outflow device includes:

[0055] The box body 1 is used to contain and guide water flow. The top of the box body 1 is provided with an overflow port, and the side of the box body 1 is provided with a water inlet;

[0056] The rainwater grate 2 is located at the overflow port on the top of the box 1 and is used to intercept large particles and prevent them from entering the drainage system;

[0057] A filtering structure is provided at the water inlet of the box 1 to perform preliminary filtering on the water flowing into the box 1;

[0058] A delayed outflow plate 4 is installed at the water inlet of the housing 1 and inside the filter structure. It is equipped with multiple leak holes 11 for controlling the rate of water discharge. The accumulated water is initially filtered by the filter structure before flowing through the delayed outflow plate 4 through the leak holes 11, delaying the draining of the accumulated water.

[0059] The box body 1, the filtering structure and the delayed outflow plate 4 can be made of waterproof and corrosion-resistant materials to prevent erosion.

[0060] The filter structure includes at least one filter layer 3 to prevent large particles from entering the housing 1. The filter layers 3 can be stacked in multiple layers, and the mesh size of the filter layers 3 can be designed according to actual needs.

[0061] In this embodiment, the filtration structure includes only one filter layer 3, and the filter layer 3 can be a filter grid. The filter grid is a common filtering tool, mainly used in water treatment, sewage treatment and industrial wastewater treatment processes to intercept and remove large particles of impurities in the water, such as suspended matter, fibers, leaves, plastic garbage, etc. It blocks these substances through a series of regularly arranged gaps or holes, while allowing smaller liquids to pass through to achieve the purpose of purifying the water quality. The working principle of the filter grid is to use water to flow through a metal or plastic grid fixed in the waterway. When water containing suspended matter flows through these grids, large particles will be intercepted on the surface or in the gaps of the grid, while clean water continues to flow. In order to maintain the filtering effect, it is usually necessary to clean the grid regularly to remove accumulated impurities.

[0062] Filter layer 3 can also be a filter grate. A filter grate (also known as a screen or filter mesh) is a device used to filter and separate solid particles from a fluid. It is typically made of one or more layers of wire mesh, plastic, or other materials with fine pores that allow liquid to pass through while blocking larger solid particles.

[0063] In this embodiment, the filter layer 3 is arranged on one side of the outer port of the water inlet of the box body 1 , and the filter layer 3 is fixed to the outer side wall of the box body 1 .

[0064] The filter layer 3 includes a filter plate portion 301 and a positioning plate portion 302 , wherein the filter plate portion 301 is connected to the positioning plate portion 302 and is L-shaped;

[0065] When the filter layer 3 is installed, the filter plate portion 301 is attached to the outer wall of the box body 1, and the positioning plate portion 302 is attached to the top of the box body 1. After the filter layer 3 is attached to the box body 1, the filter plate portion 301 is fixed to the box body 1 through multiple bolts. Specifically, multiple first bolt holes 6 are opened at the positions of the filter plate portion 301 on the outer wall of the box body 1, and are symmetrically distributed on both sides of the water inlet, such as Figure 5 and Figure 7 A plurality of first through holes are provided on the filter plate portion 301 , and the first through holes are arranged in a one-to-one correspondence with the first bolt holes 6 , so as to facilitate the installation of the first connecting bolts 7 one by one.

[0066] In this embodiment, the surface of the delayed outflow plate 4 is provided with an anti-rust layer or a waterproof layer to prevent erosion by water. Alternatively, the delayed outflow plate 4 is made of galvanized steel plate to prevent erosion by water. Galvanized steel plate has excellent corrosion resistance because the zinc layer can form a protective film to prevent iron from rusting due to contact with air and water. During the corrosion process, zinc will preferentially oxidize to protect the base metal from corrosion. Over time, the zinc layer will be accelerated by salt, acid rain, etc. in the environment, but it can still provide protection for a long time. It also has good mechanical properties: galvanized steel plate has high strength and hardness while maintaining good mechanical properties, and is suitable for various building structures and machinery manufacturing. Its tensile strength and ductility are generally higher than those of ungalvanized steel. Galvanized steel plate is also environmentally friendly and is a relatively environmentally friendly choice.

[0067] The delayed outflow plate 4 is arranged on one side of the inner port of the water inlet and is fixed to the inner wall of the box body 1 by multiple bolts. Specifically, a plurality of second bolt holes 8 are provided on the inner wall of the box body 1 corresponding to the position of the delayed outflow plate 4, and are symmetrically distributed on both sides of the water inlet, such as Figure 6 and Figure 8 A plurality of second through holes are provided on the delayed outflow plate 4, and the second through holes are arranged in a one-to-one correspondence with the second bolt holes 8, so as to facilitate the installation of the second connecting bolts 9 one by one.

[0068] The leakage holes 11 on the delayed outflow plate 4 are small holes or pores. The size and number of the leakage holes 11 can be designed according to actual needs to control the draining speed of the accumulated water.

[0069] In this embodiment, a slot 5 is provided at the overflow port, and the rain grate 2 is movably installed in the slot 5. The rain grate 2 can be flexibly placed in the slot 5, and a handle can be provided on the rain grate 2 to facilitate its removal.

[0070] The working principle of the time-delay outflow device is as follows:

[0071] When it rains, rainwater first enters the box body 1 through the water inlet of the box body 1.

[0072] Then, the rainwater will be filtered out by the filter plate portion 301 to remove larger garbage.

[0073] Next, the rainwater will slowly flow out through the small holes (leakage holes 11) on the delayed outflow plate 4. Because the leakage holes 11 are small, the water will not flow out all at once, but will flow out at a controlled rate, which can ensure that the rainwater has a certain residence time, which helps to precipitate pollutants.

[0074] If it rains too heavily and exceeds the amount that the device can handle, the excess water will be discharged through the overflow port on the top of the box body 1, so that there will be no water accumulation problem.

[0075] The goal of this device is to drain rainwater within 3 to 6 hours, which can ensure that pollutants in the rainwater are adequately precipitated and filtered, while preventing excessive accumulation of water from affecting the surrounding environment, such as breeding mosquitoes and other problems.

[0076] In general, this delayed outflow device is designed to help cities better handle rainwater, reduce flood risks, and purify rainwater. It is an environmentally friendly and practical urban infrastructure.

[0077] Example 2

[0078] This embodiment provides a drainage system, including an overflow well and the delayed outflow device, wherein the delayed outflow device is disposed on a base 10 of the overflow well.

[0079] Preferably, the drainage system is an urban drainage system.

[0080] The technical effects of the delayed outflow device are mainly reflected in the following aspects:

[0081] 1. Efficient Stormwater Management: By controlling drainage rates, the system can regulate and manage stormwater flow within urban areas to a certain extent, preventing urban flooding. Especially during periods of heavy rainfall, the system's delayed drainage feature ensures smooth drainage of rainwater, minimizing the impact of flooding on urban traffic and residents' lives. This system extends the drainage time of surface water, balancing the timely removal of surface water with sufficient sedimentation time.

[0082] 2. Rainwater Purification: The system's filter grilles / grids and delayed outflow plate design help filter out suspended matter and particulate matter from rainwater, providing initial purification. This not only reduces rainwater pollution in urban water bodies, but also reduces pressure on downstream sewage treatment facilities, improving the overall water resource recycling efficiency.

[0083] 3. Environmental Protection: By delaying drainage, the system allows sufficient time for harmful substances in rainwater to settle, reducing the pollution pressure caused by direct discharge of rainwater into natural water bodies. This is of great significance for protecting the ecological environment and maintaining the green ecological balance of the city.

[0084] 4. Cost-effectiveness: Compared to traditional drainage systems, this system reduces the need for large-scale drainage pipes and pumping stations, saving construction and operating costs. Furthermore, by rationally utilizing rainwater resources, it also promotes urban water conservation and the sustainable use of water resources.

[0085] 5. Strong adaptability: The system is suitable for a variety of urban terrains and environments, especially for areas with high groundwater levels and poor soil permeability. By controlling the drainage time, it can improve drainage efficiency and avoid the problem of poor drainage caused by insufficient soil permeability.

[0086] 6. Improved quality of life: By effectively managing stormwater, flooding and water pollution are reduced, the quality of life and safety of residents are improved, while also promoting the beautification of the urban landscape and ecological diversity.

[0087] In summary, through its unique design and functions, the delayed outflow device provides cities with a more efficient, environmentally friendly, economical and sustainable rainwater management solution, which has important practical significance and application value for promoting sponge city construction and enhancing urban resilience.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A time-delayed outflow device, used in an overflow well, characterized in that: include: A box body (1) is used to contain and guide water flow, an overflow port is provided on the top of the box body (1), and a water inlet is provided on the side of the box body (1); A rainwater grate (2), located at the overflow port on the top of the box (1), is used to intercept large particles and prevent them from entering the drainage system; A filtering structure, arranged at the water inlet of the box (1), for performing preliminary filtering on the water flowing into the box (1); The delayed outflow plate (4) is arranged at the water inlet of the box body (1) and is located inside the filtering structure. The delayed outflow plate (4) is provided with a plurality of water leakage holes (11) for controlling the discharge speed of the water flow.

2. The delayed outflow device according to claim 1, characterized in that: The filtering structure comprises at least one filtering layer (3).

3. The delayed outflow device according to claim 2, characterized in that: The filtering structure comprises a filtering layer (3), and the filtering layer (3) adopts a filtering grid or a filtering grate.

4. The delayed outflow device according to claim 3, characterized in that: The filter layer (3) is arranged on one side of the outer port of the water inlet and is fixed to the outer side wall of the box body (1) by a plurality of bolts.

5. The delayed outflow device according to claim 3, characterized in that: The filter layer (3) comprises a filter plate portion (301) and a positioning plate portion (302), wherein the filter plate portion (301) is connected to the positioning plate portion (302) and is L-shaped; The filter plate portion (301) is attached to the outer side wall of the box body (1), and the positioning plate portion (302) is attached to the top of the box body (1).

6. The delayed outflow device according to claim 1, characterized in that: The surface of the delayed outflow plate (4) is provided with an anti-rust layer, or the delayed outflow plate (4) is made of a galvanized steel plate; The delayed outflow plate (4) is arranged on one side of the inner port of the water inlet and is fixed to the inner wall of the box body (1) by a plurality of bolts.

7. The delayed outflow device according to claim 1, characterized in that: A slot (5) is provided at the overflow port, and the rainwater grate (2) is movably installed in the slot (5).

8. The delayed outflow device according to claim 1, characterized in that: The box body (1) is in the shape of a cuboid.

9. A drainage system comprising an overflow well, characterized in that: It also comprises the delayed outflow device according to any one of claims 1 to 8, wherein the delayed outflow device is arranged at the base (10) of the overflow well.

10. The drainage system according to claim 9, characterized in that: The drainage system is an urban drainage system.

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