Ecological restoration-based initial rain interception system and method for improving river water quality

Abstract

The application discloses an ecological restoration-based initial rain interception system and a method for improving river water quality, belongs to the field of water ecological restoration, and aims to solve the problems of river blackening and odor, initial rain surface source pollution and river blackening and odor in the rainy season. The system comprises a cutoff channel arranged at a platform of a river slope body, a primary culvert in communication with a vertical hole of the cutoff channel, and tires and a flow guide arranged in the cutoff channel; the flow guide drives a flow guide plate to be raised to form a flow rejection opening through an elastic member; and the water storage part can make the flow guide plate turn over to close the flow rejection opening by increasing the weight of the rainwater. The method can automatically control the turning over of the flow guide plate according to the weight change of the rainwater in the water storage part, so as to automatically open and close the flow rejection opening without manual intervention, greatly improves the automatic operation level of the system, and reduces the labor maintenance cost. The method can well resist the impact of ground pollution load in the rainy season on the river, and plays an important role in improving the river water quality.

Description

Technical Field

[0001] This invention belongs to the field of water ecological restoration technology, specifically a first-rain interception system based on ecological restoration and a method for improving river water quality. Background Technology

[0002] A certain river primarily collects domestic sewage and rainwater from the area before flowing into the main river channel. Currently, this river suffers from severe water quality problems: the water is noticeably black and foul-smelling, with large amounts of silt floating to the surface, and garbage accumulation is particularly prominent in the downstream area. Furthermore, the garbage along the banks, the black and foul-smelling water, and the exposed silt continuously emit a pungent odor, damaging the surrounding ecological environment.

[0003] Rainwater is a crucial component of the natural water cycle, playing a vital role in regulating and replenishing regional water resources and improving and protecting the ecological environment. Rapid urbanization has led to a decrease in the permeability of the ground, resulting in the accumulation of pollutants. Rainwater washes away a significant amount of these pollutants, making initial rainwater a major source of water pollution. The high concentration of pollutants in initial rainwater creates a strong shock load on river water quality. Its pollutant composition is complex, including both poorly dissolved suspended pollutants and dissolved or colloidal pollutants. Once it enters rivers, it easily deteriorates river water quality and exacerbates water pollution.

[0004] Even more serious is that some waterways are currently in a closed state, lacking exchange and circulation with other water bodies, and their self-purification capacity is already weak. Under these circumstances, pollutants brought into the waterways by rainwater cannot be effectively diluted and purified. The initial rainwater entering the rivers further exacerbates the non-point source pollution problem, leading to a continuous deterioration of the water quality and the phenomenon of "turning black and smelly" in the rivers during the rainy season.

[0005] Based on the current state of river water quality and the challenges in its management, conducting in-depth research on improving river water quality is both urgent and of significant practical importance. Summary of the Invention

[0006] Based on the problems existing in the background technology, this invention proposes an initial rainwater interception system based on ecological restoration and a method to improve river water quality. By constructing an initial rainwater interception system along both banks of the river, this invention can control non-point source pollution caused by initial rainwater runoff, playing a positive role in ensuring the water quality of the river after rain, effectively preventing the phenomenon of "returning to black and smelly" water during the rainy season, and achieving long-term cleanliness of the river.

[0007] Firstly, this technical solution proposes an initial rainwater interception system based on ecological restoration, including a slope located on the side of the river channel, a platform provided on the slope along the transverse direction, and an interception channel provided at the platform; a primary culvert is buried inside the slope, the primary culvert is located below the interception channel, and the interception channel is connected to the primary culvert through a vertical hole.

[0008] The intercepting channel is provided with a number of tires spaced apart along its length, and each tire has a side plate fixedly connected to both sides.

[0009] A flow guide is provided between two adjacent tires. The flow guide includes a flow guide plate located above the intercepting channel. One end of the flow guide plate is hinged to the wall of the intercepting channel. The flow guide plate can rotate vertically around the hinge point. An elastic element is provided between the flow guide plate and the intercepting channel. A water storage section for collecting rainwater is provided at the end of the flow guide plate away from the hinge point.

[0010] Under the elastic force of the elastic element, the end of the guide plate away from the hinge point tilts upward, forming an opening between the guide plate and the intercepting channel; the water storage section can drive the guide plate to overcome the elastic force of the elastic element and flip downward through the weight change caused by the accumulation of rainwater, until the opening is closed.

[0011] Preferably, one end of the guide plate is provided with a rotating shaft, and the wall of the intercepting channel is connected to a shaft seat, and the rotating shaft is rotatably connected to the shaft seat; the guide plate is provided with a diversion groove, and the diversion groove is connected to the water storage section.

[0012] Preferably, the elastic element is a compression spring, with one end of the compression spring connected to the bottom surface of the guide plate and the other end connected to the interception channel.

[0013] Preferably, the elastic element is a torsion spring, which is sleeved on the rotating shaft. One end of the torsion spring is connected to the guide plate, and the other end is connected to the intercepting channel.

[0014] Preferably, a secondary culvert is also provided in the slope, which is connected to the primary culvert through a connecting pipe; the top of the secondary culvert is provided with a number of inspection ports spaced apart along its length, and each inspection port can be detachably connected with a manhole cover.

[0015] Preferably, the side plate is provided with a baffle for limiting the upward angle of the guide plate.

[0016] Preferably, the top surface of the guide plate is also slidably connected to a cover plate for opening and closing the diversion channel; one end of the cover plate has a water collection channel; the guide plate is respectively provided with a first positioning platform and a second positioning platform for positioning the cover plate, wherein the first positioning platform can be magnetically connected to the end of the cover plate.

[0017] Preferably, the end of the guide plate away from the rotating shaft is provided with a flexible intercepting plate, which has a number of filter holes; the intercepting plate blocks the opening; the riverbank is provided with a guardrail, and the bottom of the guardrail is provided with a collection device for intercepting and collecting garbage.

[0018] Secondly, this technical solution proposes a method for improving river water quality, including the following steps:

[0019] The aforementioned ecological restoration-based rainwater interception system was constructed on both sides of the river channel; and the flow guide components were debugged so that the elastic components could drive the flow guide plate to maintain the preset tilt angle.

[0020] In the absence of rainfall, under the elastic force of the elastic element, the end of the guide plate away from the hinge point tilts upward, forming an opening between the guide plate and the intercepting channel, which serves as the diversion outlet.

[0021] When rainfall begins, the initial rainwater flows along the slope to the platform and into the interception channel. Some of the initial rainwater flows into the water storage section. At this time, the weight of the rainwater in the water storage section is less than the elastic force of the elastic element, so the guide plate remains tilted up and the diversion outlet remains open. The initial rainwater flows into the bottom of the interception channel through the diversion outlet and then enters the primary culvert for storage through the vertical hole.

[0022] As rainfall continues, rainwater accumulates in the water storage section, and its weight gradually exceeds the elastic force of the elastic element. The water storage section drives the guide plate to flip downward around the hinge point until the opening is closed. At this time, the guide plate acts as a flow channel, allowing the rainwater in the middle and late stages to flow directly into the river along the flow channel.

[0023] When the rainfall stops, the rainwater in the water storage section is discharged through natural evaporation, and the weight of the water storage section gradually decreases. When the weight of the water storage section is less than the elastic force of the elastic element, the guide plate is reset under the action of the elastic force of the elastic element, the opening reopens, and the system returns to its initial state, waiting for the next rainfall cycle.

[0024] Thirdly, this technical solution proposes another method to improve river water quality, including the following steps:

[0025] The aforementioned ecological restoration-based rainwater interception system was constructed on both sides of the river channel; and the flow guide was adjusted so that the elastic element could drive the flow guide plate to maintain a preset tilting angle; the cover plate was slid to the first positioning platform, and the cover plate was magnetically connected to the end of the cover plate through the first positioning platform, so that the cover plate remained closed to the flow channel.

[0026] When there is no rainfall, one end of the guide plate is tilted up under the elastic force of the elastic element, and the cover plate is magnetically positioned by the first positioning platform to close the diversion channel;

[0027] When rainfall begins, the initial rainwater flows along the slope to the platform and into the intercepting ditch through the opening; as the rainfall continues, the weight of the rainwater collection trough gradually increases after catching the rainwater. When the weight of the rainwater in the collection trough reaches the disengagement threshold of the magnetic positioning, the cover plate overcomes the magnetic attraction of the first positioning platform and slides along the slide to the second positioning platform. During this process, the diversion channel gradually opens.

[0028] As rainfall continues, rainwater accumulates in the storage compartment, and its weight gradually exceeds the elastic force of the elastic element, driving the guide plate to flip downwards around the hinge point until the opening is completely closed. After the opening is closed, the guide plate forms a flow channel, and clean rainwater flows directly into the river along the flow channel in the middle and later stages to replenish the ecological water volume.

[0029] After the rainfall stops, the rainwater in the storage compartment is discharged through natural evaporation, and the weight gradually decreases. When the weight is less than the elastic force of the elastic element, the guide plate resets and the opening reopens. The cover plate is manually pushed back to the first positioning platform, and the drainage channel is closed again by magnetic positioning. The system returns to its initial state and waits for the next rainfall cycle.

[0030] The above technical solution has the following advantages:

[0031] 1. This invention utilizes the interaction between a guide plate and an elastic element to achieve zoned control of initial rainwater interception and subsequent rainwater utilization. In the initial stage of rainfall, when the weight of the water storage section has not reached a threshold, the guide plate remains tilted upwards, and the discharge outlet is open. Highly polluted initial rainwater enters the primary culvert through the interception channel and vertical opening, preventing direct entry into the river and impacting water quality. In the later stages of rainfall, when the weight of the water storage section exceeds the elastic force of the elastic element, the guide plate flips and closes the discharge outlet, allowing clean rainwater to directly enter the river along the guide plate to replenish the ecological water volume. This reduces non-point source pollution from initial rainwater at its source, effectively solving the problem of rivers "turning black and smelly" during the rainy season.

[0032] 2. The system is naturally constructed using the slopes and platforms on both sides of the river. The main structures, such as the interception channel and culvert, are deeply integrated with the terrain, preserving the original shoreline ecology to the greatest extent. Innovatively, discarded tires are used as spacer supports within the interception channel. This not only achieves resource utilization of waste to reduce building material costs, but also provides a stable installation benchmark for the guide plates due to the tires' curvature and structural strength. Simultaneously, the elasticity of the tires can accommodate slight deformations in the interception channel caused by temperature changes or soil settlement, avoiding the problem of guide plates jamming that can easily occur with rigid supports, effectively extending the overall service life of the system. 3. The spacer structure formed by the tires and guide plates slows down the flow velocity of initial rainfall in the interception channel, allowing it to temporarily stagnate and aiding in the settling of some suspended solids. This reduces the siltation pressure on the subsequent primary culvert and decreases the frequency of dredging and maintenance.

[0033] 4. This method, through the cooperation of elastic components and guide plates, can automatically control the rotation of the guide plates according to changes in the weight of rainwater within the storage section, thereby achieving automatic opening and closing of the diversion outlet without manual intervention. This significantly improves the system's automation level and reduces labor maintenance costs. This method can effectively resist the impact of surface pollution loads on river channels during the rainy season, playing a crucial role in improving river water quality. The other two water quality improvement methods are respectively designed for conventional and high-pollution scenarios, demonstrating flexible adaptability.

[0034] 5. By setting up flexible interception plates and matching collection devices, in the early stages of rainfall, when the rainfall volume is small and the flow rate is slow, the flexible interception plates can intercept debris such as dead branches and fallen leaves, achieving pre-interception and reducing the amount of garbage entering the interception channel from the source. This eliminates the need for frequent cleaning of the interception channel and reduces maintenance workload. In the middle and later stages of rainfall, when the rainfall volume is large and the runoff velocity is fast, the impact force of the water flow can wash the garbage intercepted by the interception plates off the plates, thereby achieving self-cleaning of the interception plates. The washed-off garbage is carried by the mainstream rainwater to the river channel and collected by the matching collection devices on the riverbank, preventing garbage from directly entering the river water and ensuring that self-cleaning is not accompanied by secondary pollution. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0036] Figure 1 This is a three-dimensional diagram of the first rainwater interception system based on ecological restoration proposed in Example 1.

[0037] Figure 2 yes Figure 1 A cross-sectional view of the first rainwater interception system based on ecological restoration proposed in this invention.

[0038] Figure 3 yes Figure 1 Enlarged view of the coordination between the tire, intercepting channel and guide component (discharge port open).

[0039] Figure 4 yes Figure 3 A cross-sectional view of the tire, intercepting channel, and guide components in operation (with the diversion port open).

[0040] Figure 5 It is a magnified view of the tire, interception channel and diversion component in operation (drainage outlet closed).

[0041] Figure 6 This is a cross-sectional view of the flow guide in Embodiment 1.

[0042] Figure 7 This is a top view of the tire and the intercepting channel in Example 2.

[0043] Figure 8 It is a three-dimensional arrangement of the tire, intercepting channel, and guide component in Example 3. Figure 1 .

[0044] Figure 9 It is a three-dimensional arrangement of the tire, intercepting channel, and guide component in Example 3. Figure 2 .

[0045] Figure 10This is a cross-sectional view of the tire, intercepting channel, and guide component in Example 3.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. River channel; 2. Slope; 3. Upstream slope; 4. Downstream slope; 5. Platform; 6. Tire; 61. Side plate; 62. Baffle; 7. Guide component; 71. Guide plate; 72. Shaft seat; 73. Water storage section; 74. Diversion channel; 8. Guardrail; 81. Collection device; 9. Interception channel; 91. Slot; 10. Vertical hole; 11. Primary culvert; 12. Connecting pipe; 13. Secondary culvert; 14. Drainage pipe; 15. Inspection port; 16. Cover plate; 161. Water collection trough; 162. Second positioning platform; 17. Guide rail; 18. First positioning platform; 19. Interception plate. Detailed Implementation

[0048] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figure 1 - Figure 6 As shown, this embodiment proposes an initial rainwater interception system based on ecological restoration, including a slope 2 located on the side of the river channel 1, a platform 5 horizontally positioned on the slope 2, and an interception channel 9 located at the platform 5; the interception channel 9 is made of concrete; a primary culvert 11 is buried inside the slope 2, located below the interception channel 9, and the interception channel 9 is connected to the primary culvert 11 through a vertical opening 10. Additionally, if necessary, a filter screen can be installed at the top of the vertical opening 10 to reduce the entry of debris and impurities into the primary culvert 11.

[0051] In this embodiment, if the embankment is high, to ensure slope stability, a platform 5 of a certain width is constructed longitudinally on the slope surface, forming a two-stage slope: the upstream slope 3 and the downstream slope 4. Its function is to reduce the slope gradient in sections, decrease the overall slope height and pressure, and prevent large-scale landslides. Simultaneously, the platform 5 can serve as a drainage channel and maintenance work space, balancing functionality and safety.

[0052] In terms of specific slope protection methods, the upstream slope 3 is protected with ecological blankets, which use plant roots to reinforce the slope, combining ecological protection and slope stabilization effects; the downstream slope 4 is paved with slope protection bricks to enhance structural stability.

[0053] The intercepting channel 9 has several tires 6 spaced along its length, and each tire 6 has a side plate 61 fixedly connected to both sides. In some embodiments, the tires 6 can be fixed by angle brackets or pre-embedded parts. The intercepting channel 9 can be arc-shaped or rectangular, with the arc-shaped structure being more compatible with the bottom of the tires.

[0054] A guide member 7 is provided between two adjacent tires 6. The guide member 7 includes a guide plate 71 located above the intercepting channel 9. One end of the guide plate 71 is hinged to the channel wall of the intercepting channel 9. The guide plate 71 can rotate vertically around the hinge point. An elastic member is provided between the guide plate 71 and the intercepting channel 9 to provide elastic force. A water storage part 73 for collecting rainwater is provided at the end of the guide plate 71 away from the hinge point. A slot 91 can be opened on the intercepting channel 9, and the edge of the guide plate 71 can be easily engaged with the slot 91.

[0055] Under the elastic force of the elastic element, the end of the guide plate 71 away from the hinge point tilts upward, forming an opening between the guide plate 71 and the intercepting channel 9, allowing the initial rainwater to flow in; the water storage part 73 can drive the guide plate 71 to overcome the elastic force of the elastic element and flip downward through the weight change caused by the accumulation of rainwater, until the opening is closed, cutting off the flow channel between the initial rainwater and the intercepting channel 9.

[0056] The spaced structure formed by the tire 6 and the guide plate 71 allows the tire 6 to slow down the flow rate of the initial rain in the intercepting channel 9, allowing the initial rain to stay in the intercepting channel 9 for a short time, helping some suspended matter to settle, reducing the siltation pressure of the subsequent primary culvert 11, and reducing the frequency of dredging and maintenance.

[0057] Regarding the installation method of the air deflector 71:

[0058] One end of the guide plate 71 is provided with a rotating shaft, and the wall of the intercepting channel 9 is connected to a bearing seat 72. The rotating shaft is rotatably connected to the bearing seat 72. The guide plate 71 is provided with a diversion channel 74, which is connected to the water storage section 73. Rainwater enters the water storage section 73 through the diversion channel 74.

[0059] Regarding the elastic element, two methods are used:

[0060] The first type: The elastic element is a compression spring, one end of which is connected to the bottom surface of the guide plate 71, and the other end is connected to the interception channel 9.

[0061] The second type: The elastic element is a torsion spring, which is sleeved on the rotating shaft. One end of the torsion spring is connected to the guide plate 71, and the other end is connected to the intercepting channel 9.

[0062] In some embodiments, a secondary culvert 13 is also provided in the slope 2, which is connected to the primary culvert 11 via a connecting pipe 12. Several inspection ports 15 are spaced apart along the length of the top of the secondary culvert 13, and each inspection port 15 can be detachably connected to a manhole cover. The secondary culvert 13 is connected to a drainage pipe 14, which connects to an external sewage treatment facility, allowing initial rainwater to enter the external sewage treatment facility through the drainage pipe 14. In this embodiment, the secondary culvert 13 mainly serves a regulation and storage function: on the one hand, initial rainwater in the primary culvert 11 can enter the secondary culvert 13 through the connecting pipe 12, significantly expanding the initial rainwater storage capacity, and subsequent initial rainwater can be transported to the external sewage treatment facility through the drainage pipe 14; on the other hand, if heavy rainfall causes the water level of the river 1 to rise rapidly and overflow the top of the inspection port 15, the water in the river 1 can flow into the secondary culvert 13 through the inspection port 15 and then be discharged through the drainage pipe 14, assisting in flood control and drainage, and improving the system's ability to cope with extreme rainfall.

[0063] The side plate 61 can be connected to the tire 6 by means of adhesive bonding, bolting, or other methods. In some embodiments, the side plate 61 is provided with a baffle 62 for limiting the upward tilting angle of the guide vane 71. The baffle 62 is used to limit the upward tilting angle of the guide vane 71 to prevent it from tilting excessively and affecting its use. The baffle 62 can be fixed to a preset position on the side plate 61 by adhesive bonding, which is convenient and stable for installation.

[0064] This system is naturally constructed using the slopes 2 on both sides of the river channel 1 and the platform 5. The main structures, such as the intercepting channel 9 and the culvert, are deeply integrated with the terrain, preserving the original shoreline ecology to the greatest extent. Innovatively, discarded tires 6 are used as internal spacer supports for the intercepting channel 9. This achieves "resource utilization of waste" to reduce building material costs, while the curvature and structural strength of the tires 6 provide a stable installation reference for the guide plate 71. Simultaneously, the elasticity of the tires 6 can accommodate slight deformations of the intercepting channel 9 due to temperature changes or soil settlement, avoiding the problem of the guide plate 71 getting stuck due to rigid supports, effectively extending the overall service life of the system.

[0065] This embodiment proposes a method for improving the water quality of river channel 1, including the following steps:

[0066] The first rainwater interception system based on ecological restoration described in Example 1 was constructed on both sides of the river channel 1; and the flow guide 7 was debugged so that the elastic element could drive the flow guide plate 71 to maintain the preset tilt angle; in preparation for subsequent rainwater diversion.

[0067] In the absence of rainfall, the end of the guide plate 71 furthest from the hinge point tilts upward under the elastic force of the elastic element, forming an opening between the guide plate 71 and the intercepting channel 9, which serves as the diversion outlet; the system is in the initial state of waiting to intercept the first rain.

[0068] In the initial stage of rainfall, the initial rainwater is intercepted: When rainfall begins, the initial rainwater flows along the slope 2 to the platform 5 and into the interception channel 9. Some of the initial rainwater flows into the water storage section 73. At this time, the weight of the rainwater in the water storage section 73 is less than the elastic force of the elastic element, the guide plate 71 remains tilted, and the diversion outlet remains open. The highly polluted initial rainwater flows into the bottom of the interception channel 9 through the diversion outlet, and then enters the primary culvert 11 through the vertical hole 10 for storage, avoiding direct entry into the river.

[0069] During the middle and late stages of rainfall, clear water enters the river: As rainfall continues, rainwater accumulates in the water storage section 73, and its weight gradually exceeds the elastic force of the elastic element. The water storage section 73 drives the guide plate 71 to flip downward around the hinge point until the opening is closed. At this time, the guide plate 71 acts as a flow channel, allowing the rainwater in the middle and late stages to flow directly into the river channel 1 along the flow channel.

[0070] After the rainfall stops, the rainwater in the water storage section 73 is gradually discharged through natural evaporation, and its weight decreases slowly. When the weight of the water storage section 73 is less than the elastic force of the elastic element, the elastic force of the elastic element gradually overcomes the weight of the water storage section 73, driving the guide plate 71 to gradually flip upward and reset around the hinge point until the diversion port is fully reopened, the system returns to the initial state, and waits for the next rainfall cycle.

[0071] Application results:

[0072] This invention utilizes the interaction between the guide plate 71 and the elastic element to achieve zoned control of initial rainwater interception and subsequent rainwater utilization. In the initial stage of rainfall, when the weight of the water storage section 73 has not reached a threshold, the guide plate 71 remains tilted upwards, and the discharge outlet is open. Highly polluted initial rainwater enters the primary culvert 11 through the interception channel 9 and vertical opening 10 for storage, preventing direct entry into the river and impacting water quality. In the later stages of rainfall, when the weight of the water storage section 73 exceeds the elastic force of the elastic element, the guide plate 71 flips and closes the discharge outlet, allowing clean rainwater to directly enter the river along the guide plate 71 to replenish the ecological water volume. This reduces non-point source pollution from initial rainwater at its source, effectively solving the problem of river 1 "returning to black and smelly" during the rainy season.

[0073] This method, through the cooperation of the elastic element and the guide plate 71, can automatically control the rotation of the guide plate 71 according to the change in the weight of rainwater in the water storage section 73, thereby realizing the automatic opening and closing of the diversion outlet without manual intervention, greatly improving the automation level of the system and reducing the labor maintenance cost. This method can effectively resist the impact of surface pollution load on river 1 during the rainy season and plays an important role in improving the water quality of river 1.

[0074] Example 2:

[0075] like Figure 7As shown, the other structures are the same as in Embodiment 1, except that the tire 6 can also be fixed by insertion: when constructing the interception channel 9, several slots are reserved inside the interception channel 9, and the tire 6 can be inserted into these slots for positioning and fixation. The slot-type fixing method makes the installation and removal of the tire 6 simple and quick. Compared with other fixing methods, such as corner bracket fixing, it does not require complicated tools and too many operating steps, which can effectively save time and labor costs.

[0076] Because tire 6 can be easily removed, when cleaning the inside of the interception channel 9 is required, tire 6 can be taken out of the slot, allowing for a more comprehensive and thorough cleaning of debris, impurities, and silt within the interception channel 9, ensuring its normal operation and drainage efficiency. This design improves the maintenance convenience of the entire initial rainwater interception system. Regular cleaning of the interception channel 9 is an important measure to ensure stable system performance, and the slot-mounted tire 6 makes maintenance easier and more convenient, helping to extend the system's service life.

[0077] Example 3:

[0078] Based on Example 1 or 2, such as Figure 8-10 As shown, a cover plate 16 for opening and closing the drainage channel 74 is slidably connected to the top surface of the guide plate 71. Specifically, a guide rail 17 is provided on the surface of the guide plate 71, and the cover plate 16 is slidably connected to the guide rail 17, allowing it to move along the guide rail 17. One end of the cover plate 16 has a water collection trough 161, which can be integrally bent from the cover plate 16. End plates are welded to both sides of the water collection trough 161 to form a space for rainwater. The guide plate 71 is provided with a first positioning platform 18 and a second positioning platform 162 for positioning the cover plate 16, which limit the sliding position of the cover plate 16. The first positioning platform 18 has a magnetic attraction function and can be magnetically connected to the end of the cover plate 16. When it is not raining, the magnetic attraction can be used to connect the cover plate 16 and the first positioning platform 18, which can stably maintain the closed state of the cover plate 16 over the drainage channel 74.

[0079] This embodiment proposes another method to improve the water quality of river channel 1, based on the above-described system, including the following steps:

[0080] The first rain interception system based on ecological restoration is constructed on both sides of the river channel 1; and the flow guide 7 is debugged so that the elastic element can drive the flow guide plate 71 to maintain the preset tilt angle; the cover plate 16 is slid to the first positioning platform 18, and the first positioning platform 18 is magnetically connected to the end of the cover plate 16 so that the cover plate 16 is kept closed to the diversion channel 74.

[0081] When there is no rain, one end of the guide plate 71 is tilted up under the elastic force of the elastic element, and the cover plate 16 is magnetically positioned by the first positioning platform 18 to close the diversion channel 74;

[0082] When rainfall begins, the initial rainwater flows along the slope 2 to the platform 5 and flows into the intercepting channel 9 through the opening; as the rainfall continues, the weight of the water collection trough 161 gradually increases after receiving the rainwater. When the weight of the rainwater in the water collection trough 161 reaches the disengagement threshold of the magnetic positioning, the cover plate 16 overcomes the magnetic attraction of the first positioning platform 18 and slides along the slide to the second positioning platform 162. During this process, the diversion channel 74 gradually opens.

[0083] As rainfall continues, rainwater accumulates in the water storage section 73, and its weight gradually exceeds the elastic force of the elastic element, driving the guide plate 71 to flip downward around the hinge point until the opening is completely closed. After the opening is closed, the guide plate 71 forms a flow channel, and in the middle and later stages, clean rainwater flows directly into the river channel 1 along the flow channel to replenish the ecological water volume.

[0084] After the rainfall stops, the rainwater in the water storage section 73 is gradually discharged through natural evaporation, and its weight slowly decreases. When the weight of the water storage section 73 is less than the elastic force of the elastic element, the elastic force of the elastic element gradually overcomes the weight of the water storage section 73, driving the guide plate 71 to gradually flip upward and reset around the hinge point until the diversion port is fully reopened. The cover plate 16 is manually pushed back to the first positioning platform 18, and the diversion channel 74 is closed again by magnetic positioning. The system returns to its initial state and waits for the next rainfall cycle.

[0085] In this method, by setting up structures such as cover plate 16 and first positioning platform 18, and by using the magnetic delay opening design of cover plate 16, the guide plate 71 can be flipped down with a delay. In the early stage of rainfall, the highly polluted rainwater is forced to flow into the interception system as much as possible, thereby increasing the amount of rainwater collected in the early stage and reducing pollutants entering the river from the source. It is especially suitable for high-pollution scenarios and solves the need for enhanced interception of heavily polluted rainwater in the early stage.

[0086] The sliding of the cover plate 16 and the flipping of the deflector plate 71 are automatically triggered by gravity and elasticity, without the need for real-time manual operation; after rainfall, only manual reset of the cover plate 16 is required, resulting in low long-term maintenance costs and small errors.

[0087] In some embodiments, such as Figure 8-10 As shown, the first rainfall interception system based on ecological restoration also has the following additional features:

[0088] A flexible interceptor plate 19 is provided at the end of the guide plate 71 away from the rotating shaft. The interceptor plate 19 has several filter holes and blocks the openings. The top of the interceptor plate 19 has a bent portion, which is connected to the top surface of the end of the guide plate 71. This creates a gap between the body of the interceptor plate 19 and the end of the guide plate 71, providing space for the interceptor plate 19 to bend and ensuring that the interceptor plate 19 can adapt to the movement of the guide plate 71 when it is rotated. The interceptor plate 19 is made of a flexible material and can adapt to deformation.

[0089] In addition, a guardrail 8 is installed along the bank of the river channel 1, and a collection device 81 for intercepting and collecting garbage is installed at the bottom of the guardrail 8. The collection device 81 can be an interception filter screen, which is fixed at the bottom of the guardrail 8 and used in conjunction with the interception plate 19 to prevent garbage carried by rainwater from directly entering the natural water body.

[0090] This embodiment proposes a third method for improving the water quality of river channel 1, based on the above-described system, including the following steps:

[0091] The aforementioned ecological restoration-based rainwater interception system is constructed on both sides of the river channel 1; and the flow guide 7 is debugged so that the elastic element can drive the flow guide plate 71 to maintain the preset tilt angle; the cover plate 16 is slid to the first positioning platform 18, and the cover plate 16 is magnetically connected to the end of the first positioning platform 18, so that the cover plate 16 is kept closed to the diversion channel 74; and the interception plate 19 is blocked at the opening and in a blocking state.

[0092] When there is no rainfall, one end of the guide plate 71 is tilted up under the elastic force of the elastic element, and the cover plate 16 is magnetically positioned by the first positioning platform 18 to close the diversion groove 74; the intercepting plate 19 covers the opening, and the filter hole is in a smooth state.

[0093] When rainfall begins, the initial rainwater flows along the slope 2 to the platform 5 and into the intercepting channel 9 through the opening. As the rainfall continues, the weight of the water collection trough 161 gradually increases after catching the rainwater. When the weight of the rainwater in the water collection trough 161 reaches the magnetic positioning release threshold, the cover plate 16 overcomes the magnetic attraction of the first positioning platform 18 and slides along the chute to the second positioning platform 162. During this process, the diversion channel 74 gradually opens. During this process, the intercepting plate 19 continuously filters the initial rainwater, traps garbage and impurities, and prevents them from entering the intercepting channel 9.

[0094] As rainfall continues, rainwater accumulates in the water storage section 73, and its weight gradually exceeds the elastic force of the elastic element, driving the guide plate 71 to flip downwards around the hinge point until the opening is completely closed. During this process, as the guide plate 71 flips, the interception plate 19 also deforms adaptively. The bottom end of the interception plate 19 slides along the platform 5, gradually changing from an inclined shape to a flat shape. After the opening is closed, the guide plate 71 forms a flow channel, and the clean rainwater in the middle and late stages flows directly into the river channel 1 along the flow channel to replenish the ecological water volume. Due to the large amount of rainfall and the fast runoff velocity in the middle and late stages, the garbage intercepted and accumulated at the interception plate 19 is washed off the plate and carried by the mainstream rainwater to the river channel 1, where it is intercepted by the bank collection device 81, realizing the self-cleaning of the interception plate 19 without secondary pollution.

[0095] After the rainfall stops, the rainwater in the water storage section 73 is gradually discharged through natural evaporation, and its weight slowly decreases. When the weight of the water storage section 73 is less than the elastic force of the elastic element, the elastic force of the elastic element gradually overcomes the weight of the water storage section 73, driving the guide plate 71 to gradually flip upward and reset around the hinge point until the diversion port is fully reopened. During the reset process of the guide plate 71, the interceptor plate 19 automatically resets. The cover plate 16 is manually pushed back to the first positioning platform 18, and the diversion channel 74 is closed again by magnetic positioning. The system returns to its initial state and waits for the next rainfall cycle.

[0096] The core innovation of this solution is that if garbage is directly flushed into River 1, it will cause pollution to River 1, which violates the purpose of intercepting pollution of this invention. This design method does not require manual cleaning of garbage on the plate, saving time and effort; at the same time, it avoids garbage from directly entering natural water bodies, ensuring that self-cleaning is not accompanied by secondary pollution.

[0097] Application results:

[0098] By setting up a flexible interception plate 19 and a matching collection device 81, in the early stages of rainfall, when the rainfall volume is small and the flow rate is slow, the flexible interception plate 19 can intercept garbage such as dead branches and fallen leaves, achieving pre-interception and reducing the amount of garbage entering the interception channel 9 from the source. This eliminates the need for frequent cleaning of the interception channel 9 and reduces maintenance workload. In the middle and later stages of rainfall, when the rainfall volume is large and the runoff velocity is fast, the impact force of the water flow can wash the garbage intercepted by the interception plate 19 off the plate, thereby achieving self-cleaning of the interception plate 19. The washed-off garbage is carried by the mainstream rainwater to the river channel 1 and collected by the matching collection device 81 on the riverbank, preventing garbage from directly entering the water body of the river channel 1 and ensuring that self-cleaning is not accompanied by secondary pollution.

[0099] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for improving river water quality, characterized in that: Includes the following steps: Construct an initial rainwater interception system based on ecological restoration on both sides of the river channel (1); The first rainwater interception system based on ecological restoration includes a slope (2) located on the side of the river channel (1), a platform (5) is provided on the slope (2) along the horizontal direction, and an interception channel (9) is provided at the platform (5); a primary culvert (11) is buried inside the slope (2), the primary culvert (11) is located below the interception channel (9), and the interception channel (9) is connected to the primary culvert (11) through a vertical hole (10); The intercepting channel (9) is provided with a number of tires (6) spaced along the length direction, and each tire (6) has a side plate (61) fixedly connected to both sides. A guide (7) is provided between two adjacent tires (6). The guide (7) includes a guide plate (71) located above the intercepting channel (9). One end of the guide plate (71) is hinged to the wall of the intercepting channel (9). The guide plate (71) can rotate vertically around the hinge point. An elastic element is provided between the guide plate (71) and the intercepting channel (9). A water storage part (73) for collecting rainwater is provided at the end of the guide plate (71) away from the hinge point. The guide plate (71) has a diversion groove (74) which is connected to the water storage part (73). Under the elastic force of the elastic member, the end of the guide plate (71) away from the hinge point tilts upward, forming an opening between the guide plate (71) and the intercepting channel (9); the water storage part (73) can drive the guide plate (71) to overcome the elastic force of the elastic member and flip downward through the weight change caused by the accumulation of rainwater until the opening is closed. The top surface of the guide plate (71) is also slidably connected to a cover plate (16) for opening and closing the diversion channel (74); one end of the cover plate (16) has a water collection channel (161); the guide plate (71) is provided with a first positioning platform (18) and a second positioning platform (162) for positioning the cover plate (16), wherein the first positioning platform (18) can be magnetically connected to the end of the cover plate (16); The guide plate (71) has a rotating shaft at one end, and the intercepting channel (9) has a shaft seat (72) connected to the channel wall. The rotating shaft is rotatably connected to the shaft seat (72). The end of the guide plate (71) away from the rotating shaft is provided with a flexible intercepting plate (19). The intercepting plate (19) has several filter holes. The intercepting plate (19) blocks the opening. The bank of the river (1) is provided with a guardrail (8), and the bottom of the guardrail (8) is provided with a collection device (81) for intercepting and collecting garbage. After completing the adjustment of the guide component (7), the elastic component can drive the guide plate (71) to maintain the preset tilt angle; slide the cover plate (16) to the first positioning platform (18), and magnetically connect the end of the cover plate (16) with the first positioning platform (18), so that the cover plate (16) remains closed to the guide groove (74); When there is no rainfall, one end of the guide plate (71) is tilted up under the elastic force of the elastic element, and the cover plate (16) is magnetically positioned and closed by the first positioning platform (18) to close the diversion channel (74). When rainfall begins, the initial rainwater flows along the slope (2) to the platform (5) and into the intercepting channel (9) through the opening; as the rainfall continues, the weight of the water collection trough (161) gradually increases after receiving the rainwater. When the weight of the rainwater in the water collection trough (161) reaches the magnetic positioning detachment threshold, the cover plate (16) overcomes the magnetic attraction of the first positioning platform (18) and slides along the chute to the second positioning platform (162). During this process, the diversion channel (74) gradually opens. As rainfall continues, rainwater accumulates in the water storage section (73), and its weight gradually exceeds the elastic force of the elastic element, driving the guide plate (71) to flip downward around the hinge point until the opening is completely closed; after the opening is closed, the guide plate (71) forms a flow channel, and in the middle and late stages, clean rainwater flows directly into the river channel (1) along the flow channel to replenish the ecological water volume. After the rainfall stops, the rainwater in the water storage section (73) is discharged through natural evaporation, and the weight gradually decreases. When the weight is less than the elastic force of the elastic element, the guide plate (71) is reset and the opening is reopened. The cover plate (16) is manually pushed back to the first positioning platform (18), and the drainage channel (74) is closed again by magnetic positioning. The system returns to the initial state and waits for the next rainfall cycle.

2. The method for improving river water quality according to claim 1, characterized in that: The elastic element is a compression spring, one end of which is connected to the bottom surface of the guide plate (71), and the other end is connected to the intercepting channel (9).

3. The method for improving river water quality according to claim 1, characterized in that: The elastic element is a torsion spring, which is sleeved on the rotating shaft. One end of the torsion spring is connected to the guide plate (71), and the other end is connected to the intercepting channel (9).

4. The method for improving river water quality according to claim 1, characterized in that: A secondary culvert (13) is also provided in the slope (2). The secondary culvert (13) is connected to the primary culvert (11) through a connecting pipe (12). The top of the secondary culvert (13) is provided with a number of inspection ports (15) spaced apart along its length. Each inspection port (15) can be detachably connected with a manhole cover.

5. The method for improving river water quality according to claim 1, characterized in that: The side plate (61) is provided with a baffle (62) for limiting the upward tilt angle of the guide plate (71).

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