Stormwater runoff management system

Abstract

The application discloses a rainwater runoff management system, which comprises a water filtering mechanism, a water storage bin, an auxiliary flow channel and a water using mechanism; the water storage bin has a closed inner cavity, the water filtering mechanism is used for collecting rainwater and sending the rainwater to the water storage bin; the auxiliary flow channel comprises a main flow path connected to a preset environment, a first branch flow path and a second branch flow path for connecting the main flow path to the inner cavity of the water storage bin, and the first branch flow path and the second branch flow path have a height difference at the setting position of the water storage bin; the water using mechanism is arranged in the main flow path of the auxiliary flow channel and is used for taking water outward for application under the action of a pressurized water flow. The whole structure relies on gravity flow, does not need power, the sewage interception assembly can be self-cleaned and is free of maintenance, the high-low dual interface can buffer and release pressure during heavy rain, stably starts sprinkling irrigation, the multi-stage filtering bin is connected in series for purification, the water quality of the outlet water is ensured, and the rainwater collection and utilization integrated management with zero energy consumption and low maintenance is realized.

Description

Technical Field

[0001] This invention relates to the field of stormwater runoff management technology, and more specifically to a stormwater runoff management system. Background Technology

[0002] Rainwater, as a valuable freshwater resource, is increasingly valued in green building and sponge city construction. In the field of rainwater harvesting and utilization, common treatment processes typically include interception, filtration, storage, and subsequent reuse for irrigation. Currently, most devices implementing these functions are modular, independently operating single units connected via pipelines.

[0003] In practical applications, these traditional combined systems have some common shortcomings. First, the filtration or interception components are prone to clogging after intercepting debris, leading to a decrease in flow capacity and often requiring frequent manual cleaning and maintenance.

[0004] More importantly, existing solutions generally rely on additional external power sources to achieve the final utilization of rainwater, especially for pressure spraying or irrigation. Typically, a separate electrically driven pump set or pressurization device needs to be installed downstream of the water storage facility to lift the stored water and convert it into a sufficiently pressurized outflow to drive the sprinklers and other end-use components. This approach not only increases equipment procurement and installation costs but also involves issues such as power line layout, electrical safety protection, and continuous power consumption, making the entire system complex and placing high demands on the operating environment.

[0005] Therefore, to solve the above problems, a stormwater runoff management system is needed that can integrate stormwater filtration and pressure outflow without relying on an external power source, and achieve terminal pressure utilization by relying on its own hydraulic characteristics. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a rainwater runoff management system that can integrate rainwater filtration and pressure outflow without relying on an external power source, and realize terminal pressure utilization by relying on its own hydraulic characteristics.

[0007] The rainwater runoff management system of the present invention includes a water filtration mechanism, a water collection tank, an auxiliary flow channel, and a water use mechanism;

[0008] The water collection tank has a closed inner cavity, and the water filtration assembly is used to collect rainwater and send it to the water collection tank;

[0009] The auxiliary flow channel includes a main flow path that connects to a preset environment, and a first branch flow path and a second branch flow path that connect the main flow path to the inner cavity of the water collection tank. The first branch flow path and the second branch flow path have a height difference at the location of the water collection tank.

[0010] The water-using mechanism is located in the main flow path of the auxiliary flow channel and is used to draw water from the outside under the action of pressurized water flow.

[0011] Furthermore, the position where the water filtration mechanism connects to the water collection tank is higher than the position where the auxiliary flow channel connects to the water collection tank.

[0012] Furthermore, the water filtration mechanism includes a sludge interception component, which includes a sludge interception chamber and a sludge interception basket located on top of the sludge interception chamber. The bottom of the sludge interception chamber has a sludge discharge port that can be controlled to open and close, and the upper middle part of the sludge interception chamber is connected to the water accumulation chamber.

[0013] Furthermore, the bottom of the trap is controlled to open after being subjected to a preset pressure, and resets when the pressure drops below the preset pressure.

[0014] Furthermore, the bottom of the intercepting sludge bin includes a conical section, and the sludge outlet is located at the lower part of the conical section.

[0015] Furthermore, the sewage interception assembly also includes a power rod, with a first end near the top of the sewage interception chamber and a second end connected to the sewage outlet for controlling the opening and closing of the sewage outlet.

[0016] Furthermore, the water filtration mechanism also includes a purification component, which includes several independent filter chambers that are connected in sequence to form a water flow path, and the filter chambers are provided with filter media.

[0017] The intercepting sludge chamber and the water collection chamber are connected by several filtration chambers.

[0018] Furthermore, the filter chamber includes a permeable layer, a filter layer, and a flow guiding layer arranged sequentially in the water flow direction.

[0019] Furthermore, the water-using component is an underground lifting sprinkler head that automatically extends out of the ground to draw water for irrigation under pressurized water flow, and retracts underground after the water pressure recovers.

[0020] Furthermore, the lower part of the water storage tank is also connected to a water intake pipe that is controlled to open and close.

[0021] The beneficial effects of this invention are as follows: The rainwater runoff management system disclosed in this invention provides gravitational potential energy through a high-level arrangement of the filtration mechanism, which, combined with the pressure accumulation in the closed inner cavity of the water collection tank, drives the water-using mechanism without the need for electricity. The self-turning sewage basket and the top-mounted power rod discharge design eliminate the need for frequent manual cleaning. The dual high and low-level interfaces of the water collection tank intercept and buffer water before heavy rain, ensuring smooth start-up of the sprinkler system, and during heavy rain, both channels simultaneously discharge to prevent overflow. The four filter chambers are staggered and connected in series to form alternating water flow paths, preventing water from different purification stages from mixing and ensuring stable effluent quality. It can handle both drought and flood conditions, providing deep purification and storage for light to moderate rain, and automatic sprinkler irrigation and diversion for heavy rain. The structure is simple, installation is flexible, and it is suitable for sites without power supply. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the pollution interception component of the present invention.

[0025] Figure 3 This is a schematic diagram of the water storage tank of the present invention. Detailed Implementation

[0026] Figures 1-3 As shown in the figure, the rainwater runoff management system in this embodiment includes a water filtration mechanism, a water collection tank 1, an auxiliary flow channel, and a water use mechanism.

[0027] In this embodiment, the water filtration mechanism serves to receive rainwater collected from the roof, site, or green belt, and remove impurities of different particle sizes from the water. The specific composition of the water filtration mechanism can be a single-stage filtration or a multi-stage combination, as long as it can achieve the function of treating the collected rainwater and sending it to the water collection tank 1. The water filtration mechanism can encompass any combination of various water treatment methods such as interception, sedimentation, filtration, and purification. The water filtration mechanism is the starting point of the entire system's elevation, and its location must be higher than the water-using mechanisms on the ground. This ensures a vertical elevation difference between the water filtration mechanism, water collection tank 1, and water-using mechanisms, providing potential energy for gravity-fed flow throughout the entire process.

[0028] In this embodiment, the water filtration mechanism includes two parts: a dirt interception component and a purification component, which are arranged sequentially along the water flow direction.

[0029] In this embodiment, the intercepting component is used to intercept large particles such as leaves and silt carried in the incoming water, achieving preliminary solid-liquid separation. Its structure includes an intercepting chamber 3 and an intercepting basket 2 located near the top within the intercepting chamber 3. The top is equipped with a removable cover 4 with a drain hole for easy maintenance or cleaning. When rainwater enters the intercepting chamber 3, it first passes through the intercepting basket 2, where large particles are intercepted. The water then flows through the basket into the lower chamber space. The finer silt at the bottom settles naturally during the settling process, while the clearer water overflows from the outlet near the top of the chamber wall, achieving a three-stage separation effect: large particles are intercepted, fine particles are settled, and clear water overflows from the middle.

[0030] In this embodiment, the bottom of the intercepting basket 2 is hinged to the basket body and arranged with springs and other reset components. The springs have a pre-tightening force to close the bottom of the intercepting basket. In use, when the sludge in the basket accumulates to a certain weight, or when subjected to strong water impact during heavy rain, reaching a preset pressure value, the bottom of the basket will automatically flip downwards and open, pouring the sludge into the lower part of the intercepting chamber 3. After unloading, it will automatically reset due to the reset force of the spring. This self-cleaning design eliminates the need for frequent manual cleaning of the intercepting basket 2. The bottom of the chamber is designed in a cone shape, and the sludge naturally gathers at the lowest point along the cone surface under the action of gravity. The drain outlet is located at the lowest point of the cone surface for easy centralized discharge. The drain outlet is equipped with a spring-controlled drain valve. The opening and closing of the drain outlet is controlled by a power rod 9, which extends from the top of the chamber to the bottom drain valve 10. The operator only needs to press or pull at the top to discharge the sludge. After releasing, the valve core automatically resets and closes under the action of the spring, making maintenance very convenient.

[0031] In this embodiment, the purification component is located after the interception component and before the water collection tank 1, and is used for deep treatment of the intercepted water. The purification component consists of multiple independent filter chambers connected in series. The outlet of the interception tank 3 is connected to the first filter chamber, and the outlet of the last filter chamber is connected to the water collection tank 1. The water flow must pass through all the filter chambers in sequence before entering the water collection tank 1. Inside each filter chamber, a permeable layer, a filter layer, and a flow guiding layer are arranged sequentially in the direction of water flow. The permeable layer is laid with coarse-particle material to evenly disperse the incoming water and intercept larger particulate impurities, preventing the water flow from concentrating and eroding the lower filter media. The filter layer is laid with fine-particle filter media and is the core purification area, used to deeply intercept fine suspended solids and adsorb some dissolved pollutants, determining the quality of the effluent. The flow guiding layer is laid with large-particle gravel or pebbles to collect the water that seeps down from the upper layer and smoothly guide it to the outlet, while supporting the filter media above and preventing filter media loss. The three-layer structure features a coarse-fine-coarse particle size distribution along the water flow direction, sequentially completing the three functions of water distribution, purification, and collection. The design of multiple filter chambers connected in series forces the water flow to be purified step by step, preventing water from mixing at different stages and eliminating secondary mixing of impurities, resulting in stable effluent water quality.

[0032] The purification system in this solution comprises four filter chambers connected in series: the first filter chamber 5, the second filter chamber 6, the third filter chamber 7, and the fourth filter chamber 8. The first filter chamber 5 is the most efficient, followed by the second filter chamber 6, then the third filter chamber 7 is less efficient than the second filter chamber 6, and the fourth filter chamber 8 is more efficient than the third filter chamber 7.

[0033] The outlet on the upper middle part of the side wall of the intercepting chamber 3 is connected to the inlet of the first filter chamber 5. Water enters the first filter chamber 5 from the intercepting chamber 3. After the water level in the first filter chamber 5 rises to the top overflow outlet, it overflows into the top of the second filter chamber 6. The top of the second filter chamber 6 receives the overflow water from the first filter chamber 5, and the water permeates from top to bottom. The bottom of the second filter chamber 6 has an outlet, and the water that has permeated to the bottom flows out from this outlet and enters the interlayer located between the second filter chamber 6 and the third filter chamber 7. The outlet at the bottom of the second filter chamber 6 is connected to the bottom of the interlayer, and the water level gradually rises after entering the interlayer. The top of the interlayer has an overflow outlet, and when the water level reaches the height of the overflow outlet, the water overflows into the top of the third filter chamber 7. The top of the third filter chamber 7 receives the overflow water from the interlayer, and the water permeates from top to bottom. The bottom of the third filter chamber 7 has an outlet. The fourth filter chamber 8 is higher than the third filter chamber 7, and the outlet at the bottom of the third filter chamber 7 is connected to the fourth filter chamber 8 through a pipe. Water flows out from the bottom of the third filter chamber 7 and enters the fourth filter chamber 8 from bottom to top. The fourth filter chamber 8 receives the water from the bottom of the third filter chamber 7, and the water flows upward within the chamber. The top area of ​​the fourth filter chamber 8 has an outlet from which water overflows and enters the water collection chamber 1 below. Because the fourth filter chamber 8 is higher than the third filter chamber 7, its top outlet is higher than the bottom inlet of the third filter chamber 7, ensuring smooth overflow of water.

[0034] The entire water flow path is as follows: First filter chamber 5 inlet, top overflow outlet → Second filter chamber 6 top inlet, bottom outlet → Interlayer bottom inlet, top overflow outlet → Third filter chamber 7 top inlet, bottom outlet → Fourth filter chamber 8 bottom inlet, top overflow outlet → Water accumulation chamber 1.

[0035] The staggered arrangement of the four filter chambers creates alternating water flow paths, forcing the water to pass through all filter media layers in different directions within each chamber, preventing short-circuiting and ensuring full utilization of each stage of filter media. The fourth filter chamber 8 adopts an upward flow design with bottom inlet and top outlet, and is positioned higher than the third filter chamber 7. This allows the water to flow from bottom to top through all filter media layers in the final filter chamber before overflowing, further ensuring the quality of the effluent. The four filter chambers, connected in series and with a sandwich design, allow the water to undergo four stages of purification sequentially. Water from different purification stages does not mix, preventing secondary mixing of impurities. The final water entering the collection chamber 1 is clean water that has undergone four filtrations.

[0036] In this embodiment, the water collection tank 1 serves to receive and store the clean water treated by the filtration mechanism. The water collection tank 1 is positioned below the filtration mechanism, or even below the ground-level water-using device. The water collection tank 1 is a water storage container with a closed inner cavity. The filtration mechanism collects rainwater and delivers it to the water collection tank 1. During normal use, the water collection tank 1 is sealed except for the connection opening with the filtration mechanism and the auxiliary flow channel; it is not freely connected to the atmosphere. Water from the elevated filtration mechanism flows into the water collection tank 1 under gravity. Due to the closed inner cavity, the continuous inflow of water from the elevated filtration mechanism pressurizes the water already stored in the tank through the auxiliary flow channel to reach the ground-level water-using device. The power for this is derived from the gravitational potential energy generated by the height difference between the filtration mechanism and the water-using device, eliminating the need for an additional water pump or pressure tank.

[0037] Two interfaces at different heights are provided on the wall of the water storage tank 1. The higher interface is connected to the first diversion path 11, and the lower interface is connected to the second diversion path 12.

[0038] Under normal conditions, the water filtration system delivers water slowly, with a gradual increase in water level and pressure. Even if the water level reaches the low-level interface, it will not spray out due to insufficient pressure, and the system remains in standby mode.

[0039] In the lead-up to the heavy rain, the inflow surges, causing the water level to rise rapidly. Water simultaneously enters both the low-level and high-level inlets. The high-level inlet intercepts a portion of the rising water flow, creating a pressure relief buffer through the first diversion path 11 to prevent the water level from directly impacting the low-level inlet and causing abnormal spraying. During this buffering process, the water collection tank 1 is quickly filled, and the pressure inside the tank steadily builds up. When the pressure reaches a certain value, water is steadily sprayed out from the low-level inlet, driving the water-spraying mechanism for irrigation via the main flow path 13. Throughout the entire process, due to the interception and buffering effect of the high-level inlet, the water spraying starts smoothly without any sudden stops or starts.

[0040] The bottom of the water storage tank 1 is equipped with an independent water intake pipe 14 and a manual valve for daily manual water intake, which is independent of the functions of the two interfaces mentioned above.

[0041] In this embodiment, the auxiliary flow channel includes a main flow path 13, a first branch flow path 11, and a second branch flow path 12. One end of the main flow path 13 is connected to a preset environment, and the other end merges with the first branch flow path 11 and the second branch flow path 12 respectively. The first branch flow path 11 is connected to the high-level interface of the water collection tank 1, and the second branch flow path 12 is connected to the low-level interface of the water collection tank 1.

[0042] The first diversion path 11 receives water intercepted at the high-level interface before a rainstorm, returning it or retaining it within the pipeline to form a pressure relief buffer, assisting the water storage tank 1 in filling smoothly. The second diversion path 12, after the pressure inside the tank is established, serves as a stable outlet path, channeling water into the main flow path 13. During a rainstorm, both diversion paths simultaneously converge on the main flow path 13, multiplying the discharge capacity and rapidly reducing pressure to prevent overflow. (Water-using mechanism)

[0043] The water-using mechanism is located on the main flow path 13 of the auxiliary flow channel, drawing water outwards under the action of pressurized water flow. Its specific form can be various terminal devices such as sprinklers, nozzles, and drip irrigation pipes, as long as they can operate under pressurized water flow. In this embodiment, a buried lift-up sprinkler head 15 is preferred. When not in operation, it retracts below the ground surface, with its top flush with the ground, without affecting the landscape or passage. When the water pressure in the water collection tank 1 is sufficient, the sprinkler head automatically extends above the ground for irrigation under the water pressure. After the water pressure disappears, it automatically retracts underground. The entire process requires no human intervention or electrical control.

[0044] In summary, this structure integrates rainwater interception, purification, storage, and end-use into a purely mechanical system, completely independent of electricity. At the purification end, a physical structure enables self-cleaning and maintenance-free operation. At the outlet end, the high-level arrangement of the filtration mechanism provides gravitational potential energy, which, combined with the pressure accumulation effect within the closed cavity of the water collection tank 1, automatically drives above-ground sprinkler and other water-using equipment solely through the potential energy generated by the water level itself, achieving power-free, adaptive operation. Clean water is stored for backup, while large volumes of water are available for immediate sprinkler irrigation, catering to both drought and flood conditions. The water undergoes multiple filtrations as it flows through the interception and purification components, ensuring that the water stored in the water collection tank 1 remains clean. Regardless of the water intake method, the final product used is treated, high-quality rainwater.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stormwater runoff management system, characterized in that: Includes a water filtration system, a water collection tank, auxiliary flow channels, and a water-using system; The water collection tank has a closed inner cavity, and the water filtration assembly is used to collect rainwater and send it to the water collection tank; The auxiliary flow channel includes a main flow path that connects to a preset environment, and a first branch flow path and a second branch flow path that connect the main flow path to the inner cavity of the water collection tank. The first branch flow path and the second branch flow path have a height difference at the location of the water collection tank. The water-using mechanism is located in the main flow path of the auxiliary flow channel and is used to draw water from the outside under the action of pressurized water flow.

2. The stormwater runoff management system according to claim 1, characterized in that: The position where the water filtration mechanism connects to the water collection tank is higher than the position where the auxiliary flow channel connects to the water collection tank.

3. The stormwater runoff management system according to claim 1, characterized in that: The water filtration mechanism includes a sludge interception component, which includes a sludge interception chamber and a sludge interception basket located on top of the sludge interception chamber. The bottom of the sludge interception chamber has a sludge discharge port that can be controlled to open and close, and the upper middle part of the sludge interception chamber is connected to the water accumulation chamber.

4. The stormwater runoff management system according to claim 3, characterized in that: The bottom of the trap is opened under preset pressure and reset when the pressure drops below the preset level.

5. The stormwater runoff management system according to claim 3, characterized in that: The bottom of the intercepting silo includes a cone-shaped section, and the discharge outlet is located at the lower part of the cone-shaped section.

6. The stormwater runoff management system according to claim 5, characterized in that: The sewage interception assembly also includes a power rod, with a first end near the top of the sewage interception chamber and a second end connected to the sewage outlet for controlling the opening and closing of the sewage outlet.

7. The stormwater runoff management system according to claim 3, characterized in that: The water filtration mechanism also includes a purification component, which includes several independent filter chambers that are connected in sequence to form a water flow path, and the filter chambers are provided with filter media. The intercepting sludge chamber and the water collection chamber are connected by several filtration chambers.

8. The stormwater runoff management system according to claim 7, characterized in that: The filter chamber includes a permeable layer, a filter layer, and a flow guiding layer arranged sequentially in the direction of water flow.

9. The stormwater runoff management system according to claim 1, characterized in that: The water-using component is an underground lifting sprinkler head that automatically extends out of the ground to draw water for irrigation under pressurized water flow, and retracts underground after the water pressure recovers.

10. The stormwater runoff management system according to claim 1, characterized in that: The lower part of the water storage tank is also connected to a water intake pipe that is controlled to open and close.

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