Overflow and clarification integrated well structure suitable for rainwater garden

Abstract

The invention belongs to the technical field of rainwater treatment, and particularly relates to an overflow and clarification integrated well structure suitable for a rainwater garden, the overflow and clarification integrated well structure comprises a well body shell, the well body shell is a vertically arranged hollow cavity structure; through three-stage purification of pretreatment, clarification and deep filtration, large-particle impurities are intercepted by a multi-way pipe intercepting net and a conical filter plate, suspended matter sedimentation is realized by a clarification cavity uniform distribution plate, a guide cylinder and sedimentation inclined holes, and small particles are intercepted and pollutants are adsorbed by filter fence filler, so that the rainwater quality is ensured to reach the standard, the pollution of a municipal pipe network is reduced, and the rainwater reuse potential is improved; buoyancy driving and mechanical limiting are combined to achieve full-automatic overflow control, when the water level rises, a buoyancy plate drives a component to start overflow and lock the component, when the water level drops, the component is automatically closed, and an anti-vortex plate and a guide vane guarantee overflow stability and prevent impurities from being involved in. And the linkage part periodically discharges impurities, external power is not needed, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of rainwater treatment technology, specifically relating to an integrated overflow and clarification well structure suitable for rain gardens. Background Technology

[0002] Rain gardens, as an important component of sponge city construction, achieve rainwater infiltration, retention, purification, and utilization through the synergistic effect of plants, soil, and microorganisms. However, during heavy rainfall events such as torrential rains, the infiltration and retention capacity of rain gardens is limited. Excess rainwater needs to be discharged into the municipal drainage network through overflow devices to avoid excessive water accumulation in the rain gardens, which could cause damage to the facilities or flooding.

[0003] A review of the public announcement (CN221941577U) reveals a rainwater garden overflow well with a rainwater uniform flow and slow drainage function. This technology discloses "a rainwater garden overflow well with a rainwater uniform flow and slow drainage function, including an overflow well base. One side of the overflow well base is connected to an infiltration and storage module. During light rain, rainwater is uniformly and slowly drained through a slow-release module. During heavy rain, rainwater enters the overflow well base through the overflow well cover and is directly discharged from the outlet. This achieves both uniform and slow drainage during light rain and ensures overflow discharge during heavy rain. The slow-release module is located inside the overflow well base, facilitating cleaning and maintenance." However, in actual use, this type of overflow well only achieves rapid rainwater discharge and lacks the function of purifying overflow rainwater. During the collection process, rainwater runoff carries a large amount of pollutants such as suspended solids, silt, and organic matter. If it is discharged directly through the overflow device, it will easily cause eutrophication and water quality deterioration of the receiving water body, reducing the ecological benefits of the rain garden. In addition, some overflow devices have unreasonable structural design and are prone to pollutant accumulation and blockage, affecting their long-term stable operation.

[0004] To address the aforementioned issues, this application proposes an integrated overflow and clarification well structure suitable for rain gardens. Summary of the Invention

[0005] To address the problems mentioned in the background art, this invention provides an integrated overflow and clarification well structure suitable for rain gardens. Through three-stage purification—pretreatment, clarification, and deep filtration—a multi-channel mesh and conical filter plate intercept large particles of impurities. The clarification chamber, with its evenly distributed plate, guide tube, and sedimentation inclined holes, facilitates the settling of suspended solids. The filter media traps fine particles and adsorbs pollutants, ensuring rainwater quality meets standards, reducing pollution in municipal pipe networks, and enhancing rainwater reuse potential. A combination of buoyancy drive and mechanical limiting enables fully automatic overflow control. When the water level rises, the buoyancy plate drives the components to open and lock the overflow; when the water level falls, it automatically closes. Anti-vortex plates and guide vanes ensure stable overflow and prevent impurities from being drawn in. Relying on the impact of rainwater on the hydraulic impeller to drive the transmission shaft, a scraper cleans the filter plate, and the linked components periodically remove impurities. No external power is required, reducing operation and maintenance costs and making it suitable for unattended scenarios.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated overflow and clarification well structure suitable for rain gardens, including a well shell; The well body shell is a vertically arranged hollow cavity structure. A vertical partition is fixedly installed inside the well body shell. The vertical partition divides the internal cavity of the well body shell into an independent clarification cavity and an overflow cavity. The surface of the vertical partition is provided with a guide hole that connects the clarification cavity and the overflow cavity. A filter rail is fixedly installed on one side of the vertical partition. The entrance of the filter rail covers the outside of the guide hole. A uniform distribution plate is provided at the upper part of the clarification chamber. The uniform distribution plate is horizontally fixed to the inner wall of the vertical partition and the well shell. Multiple water distribution holes are evenly distributed on the surface of the uniform distribution plate. Multiple guide cylinders are vertically fixed on the bottom surface of the uniform distribution plate. The top of the multiple guide cylinders are connected to the multiple water distribution holes one by one. A settling plate is installed obliquely inside the clarification chamber. The top of the settling plate is fixed to one side of the vertical partition, and the bottom of the settling plate is fixed to the inner wall of the well shell. Multiple settling inclined holes are opened on the surface of the settling plate. The guide holes are flush with the top of the settling plate. An overflow pipe is fixed to one side surface of the well shell. One end of the overflow pipe passes through the side wall of the well shell and communicates with the overflow cavity. The other end of the overflow pipe extends to the drainage network of the rain garden. The port of the overflow pipe in the overflow cavity is provided with an annular anti-vortex plate. Multiple inclined guide vanes are evenly distributed on the inner wall of the anti-vortex plate.

[0007] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a spiral guide plate is provided inside the guide tube. One end of the spiral guide plate extends into the guide tube and is fixedly installed on the inner side wall of the guide tube, while the other end of the spiral guide plate is close to the bottom of the well shell.

[0008] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a guide rod is fixedly installed at the bottom of the overflow cavity, a buoyancy plate is slidably connected to the outer surface of the guide rod, a top plate is fixedly installed on the surface of the buoyancy plate, a waist groove is opened on the surface of the overflow pipe, a control plate for controlling the opening and closing of the overflow pipe is slidably connected in the waist groove, a connecting hole adapted to the inner diameter of the overflow pipe is opened on the surface of the control plate, a C-shaped limiting plate is fixedly fixed at the top of the control plate, and a top plate for lifting the C-shaped limiting plate is fixedly installed on the surface of the buoyancy plate.

[0009] As a preferred embodiment of the overflow and clarification integrated well structure applicable to rain gardens according to the present invention, a T-shaped fixing rod is fixedly installed on the inner wall of the overflow cavity, and a spring is sleeved on the outer surface of the T-shaped fixing rod. One end of the spring abuts against one side of a limiting wedge block slidably connected to the outside of the T-shaped fixing rod. The limiting wedge block is used to limit the upward movement of the C-shaped limiting plate.

[0010] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a reset connecting plate is fixedly installed on the surface of the top plate, a limit release plate is fixedly installed on one side of the limit wedge for cooperating with the reset connecting plate to release the limit wedge from the limit plate of the C-shaped limit plate, and a reset counterweight is installed on the surface of the buoyancy plate.

[0011] As a preferred embodiment of the integrated overflow and clarification well structure applicable to rain gardens according to the present invention, an L-shaped fixed guide is slidably connected to the surface of the C-shaped limiting plate. The L-shaped fixed guide is fixedly installed on the inner side wall of the overflow cavity, and a second spring is sleeved on the surface of the L-shaped fixed guide. One end of the second spring abuts against the C-shaped limiting plate.

[0012] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a well cover is detachably installed on the top of the well shell, a water-diverting concave plate is installed on the outer side of the well shell near the well cover, a multi-port pipe for diverting water is installed on the inner top of the well shell, the multiple ports of the multi-port pipe all penetrate the well shell and are connected to the water-diverting concave plate, a filter screen is inserted into the multiple ports of the multi-port pipe, and several permeable holes connected to the water-diverting concave plate are opened at the edge of the well cover.

[0013] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a filter plate is installed inside the well shell, the filter plate is arranged in an upwardly convex conical structure, an impurity collection chamber is fixedly installed on the outer surface of the well shell, and an impurity outlet is provided on the surface of the well shell, connecting the impurity collection chamber and the bottom end of the filter plate.

[0014] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a drive shaft is rotatably connected to the surface of the vertical partition. A hydraulic impeller is fixed to one end of the drive shaft that passes through the filter plate. The hydraulic impeller is located directly below the only outlet of the multi-port pipe. Multiple spiral cleaning scrapers are attached to the surface of the filter plate, and all of the multiple cleaning scrapers are fixedly installed on the outer surface of the drive shaft.

[0015] As a preferred embodiment of the integrated overflow and clarification well structure for rain gardens according to the present invention, a debris discharge hopper is fixedly installed inside the clarification chamber, a sealing ring is provided at the bottom end of the debris discharge hopper, a T-shaped guide rod is fixedly installed on the outer surface of the debris discharge hopper, a sealing disc is slidably connected to the outer surface of the T-shaped guide rod, a spring is sleeved on the outer surface of the T-shaped guide rod, one end of the spring abuts against the surface of the sealing disc, a ball-head roller is fixedly installed on the bottom surface of the sealing disc, a reducer is fixedly installed at one end of the drive shaft that passes through the vertical partition and the well shell in sequence, the reducer is fixedly installed on the bottom surface of the well shell, a connecting turntable is fixed at the output end of the reducer, and a groove adapted to the ball-head roller is opened on the surface of the connecting turntable.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This structure achieves efficient rainwater purification through a three-stage purification system of pretreatment, clarification, and deep filtration. First, the filter screen and conical filter plate in the multi-channel pipe intercept large particulate impurities, which enter the collection chamber through the impurity outlet, preventing blockage of subsequent channels. Second, the uniform distribution plate and guide tube in the clarification chamber achieve uniform water flow distribution, and the spiral guide plate guides the water flow slowly downward. Combined with the sedimentation inclined holes of the settling plate, the water flow path is extended, allowing suspended solids to settle fully by gravity. Finally, the graded quartz sand and activated carbon mixed packing in the filter bar physically intercepts small particles and adsorbs organic pollutants and odors. The three-stage purification works synergistically to effectively remove large particulate impurities, suspended solids, colloids, and trace pollutants from rainwater, ensuring that the rainwater entering the overflow chamber meets the standards. When discharged into the drainage network, it can reduce pollution to the municipal pipe network, while avoiding impurities clogging the overflow pipe and enhancing the potential for secondary utilization of rainwater resources. The structure combines buoyancy drive with mechanical limiting to achieve fully automatic control of the overflow process without manual intervention. After rainwater enters the overflow chamber, the buoyancy plate rises with the water level and floats along the guide rod, driving the top plate to lift the C-shaped limiting plate, aligning the control plate's connecting hole with the overflow pipe to open the overflow. The limiting wedge and spring one work together to lock the C-shaped limiting plate, ensuring a stable overflow state. When the water level drops, the reset counterweight drives the buoyancy plate to sink, the reset connecting plate pushes the limiting release plate to unlock, and spring two drives the control plate to close the overflow pipe, avoiding water waste. At the same time, the anti-vortex plate and guide vanes at the overflow pipe port break the conditions for vortex formation, guide the water flow in an orderly manner, and prevent air resistance and impurities from being drawn in. This ensures a stable overflow flow and further guarantees the quality of discharged water, adapting to the drainage needs of rain gardens under different rainfall intensities. The structure relies on hydraulic drive to achieve self-cleaning and periodic impurity removal of core components, significantly reducing maintenance intensity. Rainwater impacts the hydraulic impeller, driving the drive shaft to rotate. On one hand, the spiral cleaning scraper on the drive shaft rotates close to the surface of the filter plate, scraping off attached impurities in real time, preventing filter plate clogging, and ensuring long-term stable pretreatment efficiency. On the other hand, the drive shaft drives the connecting turntable to rotate slowly through the reducer. When the lower groove of the connecting turntable engages with the ball head roller top rod, it pushes the sealing plate down to open the impurity discharge hopper, automatically discharging the deposited impurities at the bottom of the clarification chamber. Spring 3 and sealing ring ensure reliable sealing after impurity discharge. The entire cleaning and impurity discharge process requires no external power, relying on the energy of the rainwater itself. This not only saves energy consumption but also reduces the frequency of manual dredging, lowers maintenance costs, and extends the service life of the equipment. It is especially suitable for rain gardens that operate unattended for extended periods. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of a partial internal structure of the well casing of the present invention; Figure 3 In this invention Figure 2 A side view of the structure; Figure 4 This is a schematic diagram of the structure of the filter plate, vertical partition, and waste discharge hopper in this invention; Figure 5 This is a schematic diagram of the structure of the vertical partition, the uniform distribution plate, and the settlement plate in this invention; Figure 6 This is a schematic diagram of the structure of the guide tube and the spiral guide plate in this invention; Figure 7 This is a schematic diagram of a partial internal structure of the overflow cavity in this invention; Figure 8 This is a schematic diagram of the structure of the guide rod, buoyancy plate, and top plate in this invention; Figure 9 This is a schematic diagram of the anti-vortex plate, guide vanes, and control plate in this invention; Figure 10 This is a schematic diagram of the structure of the hydraulic impeller, cleaning scraper, and filter plate in this invention; Figure 11 This is a schematic diagram of the structure of the reducer, connecting turntable, and waste discharge hopper pipe in this invention; Figure 12 This is a schematic diagram of the structure of the filter bar and the flow guide hole in this invention; Figure 13 In this invention Figure 8 Enlarged schematic diagram of the structure at point A in the diagram; Figure 14 In this invention Figure 11 Enlarged schematic diagram of the structure at point B in the diagram.

[0018] In the picture: 1. Well casing; 2. Vertical partition; 3. Clarification chamber; 4. Overflow chamber; 5. Distribution plate; 6. Water distribution hole; 7. Guide tube; 8. Spiral guide plate; 9. Settlement plate; 10. Settlement inclined hole; 11. Overflow pipe; 12. Anti-vortex plate; 13. Guide vane; 14. Waist groove; 15. Control plate; 16. Connecting hole; 17. Guide rod; 18. Buoyancy plate; 19. Top plate; 20. Reset counterweight; 21. C-shaped limit plate; 22. Reset connecting plate; 23. T-shaped fixing rod; 24. Spring 1; 25. Limiting wedge; 26. L-shaped fixing... 27. Fixed guide frame; 28. Spring II; 29. ​​Filter rail; 30. Hydraulic impeller; 31. Filter plate; 32. Cleaning scraper; 33. Drive shaft; 34. Impurity outlet; 35. Impurity collection bin; 36. Water inlet plate; 37. Well cover; 38. Water permeable hole; 39. Multi-port pipe; 40. Filter screen; 41. Impurity discharge hopper pipe; 42. Sealing plate; 43. T-shaped guide rod; 44. Spring III; 45. Ball head roller top rod; 46. Reducer; 47. Connecting turntable; 48. Lower groove; 49. Flow guide hole; 50. Limit release plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Figures 1-14As shown, the present invention provides a technical solution: an integrated overflow and clarification well structure suitable for rain gardens, including a well shell 1; The well body shell 1 is a vertically arranged hollow cavity structure. A vertical partition 2 is fixedly installed inside the well body shell 1. The vertical partition 2 divides the internal cavity of the well body shell 1 into an independent clarification chamber 3 and an overflow chamber 4. The surface of the vertical partition 2 is provided with a guide hole 49 that connects the clarification chamber 3 and the overflow chamber 4. A filter rail 28 is fixedly installed on one side of the vertical partition 2. The entrance of the filter rail 28 is covered outside the guide hole 49. A uniform distribution plate 5 is provided on the upper part of the clarification chamber 3. The uniform distribution plate 5 is horizontally fixed to the inner wall of the vertical partition 2 and the well shell 1. Multiple water distribution holes 6 are evenly distributed on the surface of the uniform distribution plate 5. Multiple guide tubes 7 are vertically fixed on the bottom surface of the uniform distribution plate 5. The top of the multiple guide tubes 7 is connected to the multiple water distribution holes 6 one by one. A settling plate 9 is installed obliquely inside the clarification chamber 3. The top of the settling plate 9 is fixed to one side of the vertical partition 2. The bottom of the settling plate 9 is fixed to the inner wall of the well shell 1. Multiple settling inclined holes 10 are opened on the surface of the settling plate 9. The guide holes 49 are flush with the top of the settling plate 9. An overflow pipe 11 is fixed on one side surface of the well shell 1. One end of the overflow pipe 11 passes through the side wall of the well shell 1 and is connected to the overflow cavity 4. The other end of the overflow pipe 11 extends to the drainage pipe network of the rain garden. The port of the overflow pipe 11 in the overflow cavity 4 is provided with an annular anti-vortex plate 12. Multiple inclined guide vanes 13 are evenly distributed on the inner wall of the anti-vortex plate 12.

[0021] A spiral guide plate 8 is provided inside the guide tube 7. One end of the spiral guide plate 8 extends into the guide tube 7 and is fixedly installed on the inner side wall of the guide tube 7. The other end of the spiral guide plate 8 is close to the bottom of the well body shell 1.

[0022] A guide rod 17 is fixedly installed at the bottom of the overflow chamber 4. A buoyancy plate 18 is slidably connected to the outer surface of the guide rod 17. A top plate 19 is fixedly installed on the surface of the buoyancy plate 18. A waist groove 14 is opened on the surface of the overflow pipe 11. A control plate 15 for controlling the opening and closing of the overflow pipe 11 is slidably connected in the waist groove 14 opened on the surface of the overflow pipe 11. A connecting hole 16 adapted to the inner diameter of the overflow pipe 11 is opened on the surface of the control plate 15. A C-shaped limiting plate 21 is fixedly installed at the top of the control plate 15. A top plate 19 for lifting the C-shaped limiting plate 21 is fixedly installed on the surface of the buoyancy plate 18.

[0023] A T-shaped fixing rod 23 is fixedly installed on the inner wall of the overflow cavity 4. A spring 24 is sleeved on the outer surface of the T-shaped fixing rod 23. One end of the spring 24 abuts against one side of the limiting wedge block 25 that is slidably connected to the outside of the T-shaped fixing rod 23. The limiting wedge block 25 is used to limit the upward movement of the C-shaped limiting plate 21.

[0024] A reset connecting plate 22 is fixedly installed on the surface of the top plate 19. A limit release plate 50 is fixedly installed on one side of the limit wedge 25 to cooperate with the reset connecting plate 22 to release the limit wedge 25 from the limit of the C-shaped limit plate 21. A reset counterweight 20 is installed on the surface of the buoyancy plate 18.

[0025] An L-shaped fixed guide 26 is slidably connected to the surface of the C-shaped limiting plate 21. The L-shaped fixed guide 26 is fixedly installed on the inner wall of the overflow cavity 4, and a spring 27 is sleeved on the surface of the L-shaped fixed guide 26. One end of the spring 27 abuts against the C-shaped limiting plate 21.

[0026] A well cover 36 is detachably installed on the top of the well shell 1. A water-diverting concave plate 35 is installed on the outer side of the well shell 1 near the well cover 36. A multi-port pipe 38 for diversion is installed on the inner top of the well shell 1. The multi-port ends of the multi-port pipe 38 all penetrate the well shell 1 and are connected to the water-diverting concave plate 35. A filter screen 39 is inserted into each of the multi-port pipes of the multi-port pipe 38. Several water-permeable holes 37 connected to the water-diverting concave plate 35 are opened at the edge of the well cover 36.

[0027] A filter plate 30 is installed inside the well shell 1. The filter plate 30 is a cone-shaped structure with an upward convex shape. An impurity collection chamber 34 is fixedly installed on the outer surface of the well shell 1. An impurity outlet 33 is provided on the surface of the well shell 1 to connect the impurity collection chamber 34 and the bottom of the filter plate 30.

[0028] A drive shaft 32 is rotatably connected to the surface of the vertical partition 2. A hydraulic impeller 29 is fixed to one end of the drive shaft 32 that passes through the filter plate 30. The hydraulic impeller 29 is located directly below the only outlet of the multi-port pipe 38. Multiple spiral cleaning scrapers 31 are attached to the surface of the filter plate 30. All cleaning scrapers 31 are fixedly installed on the outer surface of the drive shaft 32.

[0029] A discharge hopper pipe 40 is fixedly installed inside the clarification chamber 3. A sealing ring 42 is provided at the bottom end of the discharge hopper pipe 40. A T-shaped guide rod 43 is fixedly installed on the outer surface of the discharge hopper pipe 40. A sealing disc 41 is slidably connected to the outer surface of the T-shaped guide rod 43. A spring 44 is sleeved on the outer surface of the T-shaped guide rod 43. One end of the spring 44 abuts against the surface of the sealing disc 41. A ball head roller top rod 45 is fixedly installed on the bottom surface of the sealing disc 41. A reducer 46 is fixedly installed at one end of the drive shaft 32 that passes through the vertical partition 2 and the well shell 1 in sequence. The reducer 46 is fixedly installed on the bottom surface of the well shell 1. A connecting turntable 47 is fixedly installed at the output end of the reducer 46. A groove 48 adapted to the ball head roller top rod 45 is opened on the surface of the connecting turntable 47.

[0030] The working principle and usage process of this invention: When this integrated overflow and clarification well structure suitable for rain gardens is in use, rainwater in the rain garden flows into the water inlet plate 35 through the permeable holes 37 on the edge of the well cover 36, and is collected through the multi-port end of the multi-port pipe 38. During this process, the filter screen 39 in the multi-port pipe 38 first intercepts the rainwater, removing large particles such as leaves and dead branches. The filtered rainwater is sprayed out from the only outlet of the multi-port pipe 38, impacting the hydraulic impeller 29 below, driving the drive shaft 32 to rotate, providing power for the subsequent cleaning mechanism. The rainwater then falls onto the filter plate 30 with an upwardly convex conical structure, further filtering out fine impurities. Under the action of gravity, the impurities slide down the inclined surface of the filter plate 30 to the impurity outlet 33, and finally enter the impurity collection chamber 34 for temporary storage. After being treated by the filter plate 30, the rainwater enters the clarification chamber 3 and first flows through the uniform distribution plate 5. The rainwater is evenly distributed through the water distribution holes 6 on its surface to avoid excessive local flow. The guide tube 7 below each water distribution hole 6 guides the rainwater to fall vertically downward. If the guide tube 7 is equipped with a spiral guide plate 8, the rainwater can form a spiral flow. On the one hand, the spiral structure guides the rainwater to spiral down along the tube wall, reducing the water drop point from the upper part of the clarification chamber 3 to the lower part near the bottom, greatly reducing the water drop height. On the other hand, the spiral flow can buffer the impact kinetic energy of the water flow, preventing the high-speed water flow from directly impacting the impurities that have been deposited at the bottom of the clarification chamber 3, preventing the deposited impurities from being washed up and mixed back into the water, and ensuring the effect of solid-liquid separation and clarification. As the water level in the clarification chamber 3 gradually rises, rainwater overflows the surface of the settling plate 9 and passes through the settling inclined hole 10. The inclined design of the settling inclined hole 10 not only extends the path of the rainwater flow but also slows down the water flow speed, allowing the suspended matter carried by the rainwater to have sufficient time to detach from the water body under the action of gravity and settle down to the bottom of the clarification chamber 3 along the inclined surface of the settling inclined hole 10, achieving the effect of efficient solid-liquid separation and clarification. The purified rainwater continues to accumulate in the clarification chamber 3. When the water level rises to be level with the guide hole 49 on the surface of the vertical partition 2, the clarified rainwater flows into the overflow chamber 4 through the guide hole 49. When rainwater enters the overflow chamber 4, it must first pass through the filter bar 28 fixed to one side of the vertical partition 2 (the filter bar 28 is installed outside the guide hole 49, forcing the rainwater to flow through the filter bar 28 before entering the overflow chamber 4). The filter bar 28 is filled with a mixture of graded quartz sand and activated carbon: the graded quartz sand particles filter out residual micro-pollutants in the rainwater through physical interception, while the small activated carbon particles remove small organic pollutants and odors in the water through adsorption, further improving the rainwater purification effect and preventing small impurities from entering the overflow chamber 4 with the water flow, causing pipe blockage or affecting the drainage water quality. After being deeply purified by the filter bar 28, the rainwater finally flows into the overflow chamber 4 through the guide hole 49, ensuring that the rainwater entering the overflow process meets the standards. As rainwater gradually accumulates in the overflow chamber 4, the buoyancy plate 18 floats up along the guide rod 17, causing the top plate 19 to lift the C-shaped limiting plate 21. The C-shaped limiting plate 21 slides along the L-shaped fixed guide frame 26 and compresses the second spring 27. When the C-shaped limiting plate 21 moves up to the position of the limiting wedge 25, the limiting wedge 25 pops out under the elastic force of the first spring 24, limiting and fixing the C-shaped limiting plate 21. At this time, the connecting hole 16 on the surface of the control plate 15 is aligned with the overflow pipe 11, and the rainwater is discharged into the rain garden drainage network through the overflow pipe 11. By installing an annular anti-vortex plate 12 and an inclined guide vane 13 on the inner wall at the port of overflow pipe 11, the annular anti-vortex plate 12 breaks the conditions for water flow to form vortices through an annular shielding structure, preventing rainwater from forming vortices at the port of overflow pipe 11 due to high flow velocity. The inclined guide vane 13 on the inner wall has a uniformly distributed inclined angle, which can guide rainwater to flow smoothly in a spiral shape along the inner wall of overflow pipe 11, transforming disordered water flow into an ordered flow state, reducing collision and friction of water flow in the pipe, reducing head loss, and ensuring stable overflow efficiency. The synergistic effect of the two can prevent a small amount of incompletely settled micro-impurities at the bottom of overflow cavity 4 (which may still exist after previous purification) from being drawn into overflow pipe 11 by vortex suction, further ensuring the quality of rainwater discharged to the drainage network, while avoiding impurities from accumulating in the pipe and causing blockage, thus extending the pipe maintenance cycle. When the rainwater decreases and the water level in the overflow chamber 4 drops, the buoyancy plate 18 sinks under the gravity of the reset counterweight 20, the reset connecting plate 22 pushes the limit release plate 50, the limit wedge 25 compresses the spring 24 to reset, the C-shaped limit plate 21 falls back under the elastic force of the spring 27, and the control plate 15 closes the overflow pipe 11 to stop the overflow. When the drive shaft 32 rotates, the multiple spiral cleaning scrapers 31 fixed on its surface rotate closely against the surface of the filter plate 30, scraping off the impurities attached to the filter plate 30 and ensuring that the filtration channel is unobstructed. The other end of the drive shaft 32 drives the connecting turntable 47 to rotate slowly through the reducer 46. When the lower groove 48 on the surface of the connecting turntable 47 rotates to below the ball head roller top rod 45, the ball head roller top rod 45 is embedded in the lower groove 48 under the elastic force of the spring 3 44, which drives the sealing plate 41 to move down along the T-shaped guide rod 43, so that the bottom end of the impurity discharge hopper 40 is opened, and the impurities deposited at the bottom of the clarification chamber 3 are discharged through the impurity discharge hopper 40. When the connecting turntable 47 continues to rotate and the lower groove 48 disengages from the ball head roller top rod 45, the sealing plate 41 is reset under the elastic force of the spring 3 44, and the impurity discharge hopper 40 is sealed by the sealing ring 42, completing the periodic impurity discharge.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated overflow and clarification well structure suitable for rain gardens, comprising a well shell (1); characterized in that: The well body shell (1) is a vertically arranged hollow cavity structure. A vertical partition (2) is fixedly installed inside the well body shell (1). The vertical partition (2) divides the internal cavity of the well body shell (1) into an independent clarification cavity (3) and an overflow cavity (4). The surface of the vertical partition (2) is provided with a guide hole (49) that connects the clarification cavity (3) and the overflow cavity (4). The upper part of the clarification chamber (3) is provided with a uniform distribution plate (5), which is horizontally fixed to the inner side wall of the vertical partition (2) and the well shell (1). The surface of the uniform distribution plate (5) is evenly distributed with multiple water distribution holes (6). The bottom surface of the uniform distribution plate (5) is vertically fixed with multiple guide cylinders (7). The top of the multiple guide cylinders (7) is connected to the multiple water distribution holes (6) one by one. The settling plate (9) is installed obliquely inside the clarification chamber (3), and the surface of the settling plate (9) is provided with multiple settling inclined holes (10). The guide holes (49) are flush with the top of the settling plate (9). An overflow pipe (11) is fixed on one side surface of the well shell (1). One end of the overflow pipe (11) penetrates the side wall of the well shell (1) and communicates with the overflow cavity (4). The other end of the overflow pipe (11) extends to the drainage network of the rain garden.

2. The integrated overflow and clarification well structure for rain gardens according to claim 1, characterized in that: The guide tube (7) is provided with a spiral guide plate (8). One end of the spiral guide plate (8) extends into the guide tube (7) and is fixedly installed on the inner side wall of the guide tube (7). The other end of the spiral guide plate (8) is close to the bottom of the well shell (1). A filter rail (28) is fixedly installed on one side of the vertical partition (2). The inlet of the filter rail (28) is covered on the outside of the guide hole (49). The top of the settling plate (9) is fixed to one side of the vertical partition (2). The bottom of the settling plate (9) is fixed to the inner wall of the well shell (1). The overflow pipe (11) has an annular anti-vortex plate (12) at the port in the overflow cavity (4). The inner wall of the anti-vortex plate (12) is evenly distributed with multiple inclined guide blades (13).

3. The integrated overflow and clarification well structure for rain gardens according to claim 1, characterized in that: A guide rod (17) is fixedly installed at the bottom of the overflow cavity (4). A buoyancy plate (18) is slidably connected to the outer surface of the guide rod (17). A top plate (19) is fixedly installed on the surface of the buoyancy plate (18). A waist groove (14) is opened on the surface of the overflow pipe (11). A control plate (15) for controlling the opening and closing of the overflow pipe (11) is slidably connected in the waist groove (14) opened on the surface of the overflow pipe (11). A connecting hole (16) adapted to the inner diameter of the overflow pipe (11) is opened on the surface of the control plate (15). A C-shaped limiting plate (21) is fixed at the top of the control plate (15). A top plate (19) for lifting the C-shaped limiting plate (21) is fixedly installed on the surface of the buoyancy plate (18).

4. The integrated overflow and clarification well structure for rain gardens according to claim 3, characterized in that: A T-shaped fixing rod (23) is fixedly installed on the inner wall of the overflow cavity (4). A spring (24) is sleeved on the outer surface of the T-shaped fixing rod (23). One end of the spring (24) abuts against one side of a limiting wedge (25) that is slidably connected to the outside of the T-shaped fixing rod (23). The limiting wedge (25) is used to limit the upward movement of the C-shaped limiting plate (21).

5. The integrated overflow and clarification well structure for rain gardens according to claim 4, characterized in that: A reset connecting plate (22) is fixedly installed on the surface of the top plate (19). A limit release plate (50) is fixedly installed on one side of the limit wedge (25) to cooperate with the reset connecting plate (22) to release the limit wedge (25) from the limit plate (21) of the C-shaped limit plate (21). A reset counterweight (20) is installed on the surface of the buoyancy plate (18).

6. The integrated overflow and clarification well structure for rain gardens according to claim 5, characterized in that: The surface of the C-shaped limiting plate (21) is slidably connected to an L-shaped fixed guide (26). The L-shaped fixed guide (26) is fixedly installed on the inner wall of the overflow cavity (4), and a spring (27) is sleeved on the surface of the L-shaped fixed guide (26). One end of the spring (27) abuts against the C-shaped limiting plate (21).

7. The integrated overflow and clarification well structure for rain gardens according to claim 1, characterized in that: The top of the well shell (1) is detachably fitted with a well cover (36). A water-diverting concave plate (35) is installed on the outer side of the well shell (1) near the well cover (36). A multi-port pipe (38) for diverting water is installed on the inner top of the well shell (1). The multi-port ends of the multi-port pipe (38) all penetrate the well shell (1) and are connected to the water-diverting concave plate (35). A filter screen (39) is inserted into the multi-port pipe (38). Several permeable holes (37) connected to the water-diverting concave plate (35) are opened at the edge of the well cover (36).

8. The integrated overflow and clarification well structure for rain gardens according to claim 1, characterized in that: The well body shell (1) is equipped with a filter plate (30) inside. The filter plate (30) is a cone-shaped structure with an upward convex shape. An impurity collection chamber (34) is fixedly installed on the outer surface of the well body shell (1). An impurity outlet (33) is provided on the surface of the well body shell (1) to connect the impurity collection chamber (34) and the bottom end of the filter plate (30).

9. The integrated overflow and clarification well structure for rain gardens according to claim 1, characterized in that: The vertical partition (2) is rotatably connected to a drive shaft (32). A hydraulic impeller (29) is fixed at one end of the drive shaft (32) that passes through the filter plate (30). The hydraulic impeller (29) is located directly below the only outlet of the multi-port pipe (38). Multiple spiral cleaning scrapers (31) are attached to the surface of the filter plate (30). All of the cleaning scrapers (31) are fixedly installed on the outer surface of the drive shaft (32).

10. The integrated overflow and clarification well structure for rain gardens according to claim 9, characterized in that: A discharge hopper tube (40) is fixedly installed inside the clarification chamber (3). A sealing ring (42) is provided at the bottom end of the discharge hopper tube (40). A T-shaped guide rod (43) is fixedly installed on the outer surface of the discharge hopper tube (40). A sealing disc (41) is slidably connected to the outer surface of the T-shaped guide rod (43). A spring three (44) is sleeved on the outer surface of the T-shaped guide rod (43). One end of the spring three (44) abuts against the surface of the sealing disc (41). A ball head roller rod (45) is fixedly installed on the bottom surface of the sealing disc (41). A reducer (46) is fixedly installed at one end of the transmission shaft (32) that passes through the vertical partition (2) and the well shell (1) in sequence. The reducer (46) is fixedly installed on the bottom surface of the well shell (1). A connecting turntable (47) is fixed at the output end of the reducer (46). A groove (48) that matches the ball head roller rod (45) is opened on the surface of the connecting turntable (47).

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