A self-cleaning filter device for preventing blockage of a greenway water supply and drainage side ditch

Abstract

The application discloses a kind of greenway water supply and sewerage side ditch self-dredging anti-blocking filter device, comprising: multiple modular pipe bodies and sediment filter tank that are sequentially sealed connection;The side wall of the multiple modular pipe body is communicated with tangential water inlet assembly, and tangential water inlet assembly is provided with detachable staged filtration structure;Multiple modular pipe body is provided with helical blade group and arc flow guide wall arranged coaxially in it, to form staged cyclone centrifugal sedimentation channel;The end of the multiple modular pipe body is provided with arc dead-corner-free mud collection structure, and the arc dead-corner-free mud collection structure is sealed to the sediment filter tank;Sediment filter tank is provided with vertically pullable mud-water separation filter assembly, to realize power-free self-dredging and anti-blocking.The application can realize accurate working condition adaptation by multiple modular pipe body design, reduce silt and impurities accumulation in flow channel from source by step-by-step staged interception design, realize step-by-step staged interception of non-homogeneous mixed impurities by tangential pipe design, and delay filter surface blockage.

Description

Technical Field

[0001] This invention relates to the field of filtration device technology, and in particular to a self-cleaning and anti-clogging filtration device for greenway water supply and drainage ditches. Background Technology

[0002] In the water supply and drainage systems of urban greenways, ecological parks, and scenic walkways, side ditch drainage devices are responsible for collecting surface runoff, filtering impurities, settling sediment, and guiding drainage. Their drainage smoothness, self-cleaning ability, and ease of operation and maintenance directly affect the safety of greenway use and the ecological landscape effect. Currently, most greenway water supply and drainage side ditches use traditional municipal drainage ditch structures, without being specifically designed to address the special conditions of large flow fluctuations, complex impurity types, long laying distances, high landscape requirements, and low-disturbance maintenance. This results in significant technical deficiencies in actual use.

[0003] Existing ditch filtration structures mostly use a single planar bar for interception, lacking a graded filtration layout. Mixed impurities such as branches, fibers, and silt of different particle sizes directly impact the filter surface, easily causing rapid clogging of the filter pores. Furthermore, the planar bar has poor compatibility with the tangential inflow water, allowing impurities to accumulate and adhere in the gap between the bar and the channel wall, further exacerbating the clogging risk. Meanwhile, traditional vortex sedimentation units mostly use fixed single guide vanes without multi-stage vortex enhancement design. The vortex intensity is insufficient, making it difficult to achieve efficient separation of silt and lightweight debris. The guide angle is fixed and cannot be adjusted, failing to adapt to the varying water flow velocity and sediment content conditions of greenway ditches.

[0004] Regarding sedimentation and drainage structures, existing sedimentation tanks are mostly straight-walled conical or right-angle transition structures. Significant sedimentation dead zones exist at the junction of the tank and the vortex unit, leading to long-term sediment retention and compaction. This makes self-cleaning without power impossible, requiring periodic manual high-pressure flushing or excavation for dredging. Furthermore, the connection between the sedimentation unit and drainage pipes often uses simple straight-cylinder connections with poor sealing reliability, making them prone to groundwater infiltration and rainwater backflow. This causes deposited sediment to flow back into the side ditches, significantly reducing sedimentation and filtration efficiency.

[0005] In terms of structural adaptability and maintenance, existing side ditches and filtration and sedimentation devices are mostly integrated on-site cast-in-place, making it impossible to achieve modular prefabrication and segmented splicing. When laying long-distance greenways, transportation and construction are difficult, and it is hard to flexibly adjust the device specifications according to the site length. At the same time, the functional components are fixed by welding or casting, without standardized detachable interfaces. When cleaning the filter, repairing the blades, and removing sediment, large-scale excavation of underground ditches is required, damaging the greenway paving and landscape layer. The construction costs are high, the cycle is long, and the disturbance is great, which is seriously inconsistent with the construction requirements of greenways for low maintenance and high landscape integrity.

[0006] In summary, existing greenway drainage ditch filtration and sedimentation devices generally suffer from a series of technical problems, such as easy clogging, low vortex sedimentation efficiency, numerous sedimentation dead zones, poor sealing and backflow prevention performance, low modularity, and the need for excavation for maintenance, which damages the landscape. These issues make it difficult to meet the long-term stable operation requirements of modern urban greenways. Therefore, there is an urgent need to develop a drainage ditch filtration device that features self-cleaning, anti-clogging, modular splicing, reliable sealing, and no excavation or maintenance. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches, comprising: A multi-stage modular pipe body and a sedimentation filter tank connected in sequence with sealing; The sidewall of the multi-stage modular pipe is connected to a tangential water inlet assembly, which contains a detachable graded filtration structure. The multi-stage modular tube body is equipped with coaxially arranged spiral blade groups and arc-shaped guide walls to form a staged swirling centrifugal sedimentation channel; The end of the multi-stage modular pipe is provided with an arc-shaped, dead-angle-free mud collection structure, which is sealed and connected to the sedimentation filter tank. The sedimentation filter tank is equipped with a vertically pull-out mud-water separation filter component, which enables self-cleaning without power and prevents clogging.

[0008] Furthermore, the multi-stage modular pipe body includes an initial pipe body, at least one splicing pipe body, and an end pipe body. The pipe bodies are detachably spliced ​​using flanges, and the number of splicing pipe bodies can be increased or decreased to adapt to greenway side ditches of different lengths.

[0009] Furthermore, the tangential water inlet assembly includes a first tangential pipe, a second tangential pipe, and a third tangential pipe respectively disposed in the initial pipe body, the splicing pipe body, and the final pipe body; Each tangential pipe has a tangential opening, and the top of the tangential opening is fitted with a trench cover that is flush with the greenway paving.

[0010] Furthermore, the graded filtration structure includes an integrally formed vertical filter plate and an arc-shaped filter plate. The arc-shaped filter plate fits into the curved surface of the inner wall of the tangential tube to eliminate filtration dead angles. Both the vertical filter plate and the arc-shaped filter plate are porous structures and can be detachably sleeved in the tangential opening.

[0011] Furthermore, the spiral blade assembly includes a first spiral blade assembly, a second spiral blade assembly, and a third spiral blade assembly correspondingly disposed in the initial pipe body, the splicing pipe body, and the final pipe body, and adjacent spiral blade assemblies are detachably connected by splicing flanges. The initial tube body is provided with an initial fixing plate at the end, and the first spiral blade assembly is fixed to the flange of the initial fixing plate.

[0012] Furthermore, the arc-shaped, dead-angle-free mud collection structure is an arc-shaped cone integrally formed at the end of the final pipe body, and the arc-shaped cone is provided with a tapered arc-shaped cone opening; The connection between the arc-shaped conical inlet and the sludge filter tank is sealed by a flange clamping gasket to prevent leakage and backflow.

[0013] Furthermore, the mud-water separation filtration assembly includes a filter tank that is fitted into the settling filter tank cavity with a gap fit. The side wall of the filter tank has a porous water filtration structure, and the interior forms a post-filtration cavity. The filter tank has a filter tank opening that is coaxially connected to the connection inlet, and a handle is provided at the top. The top of the sedimentation filter tank is hinged with an inspection cover with a snap-lock mechanism.

[0014] Furthermore, the sedimentation filter tank is provided with a coaxial connection outlet on the side away from the connection inlet, and a standardized flange interface for connecting to the municipal drainage network is provided on the outside of the connection outlet.

[0015] The beneficial effects of this invention are reflected in: This invention achieves graded interception of heterogeneous mixed impurities by correspondingly setting three stages of tangential pipes in the initial pipe body, splicing pipe body, and final pipe body. This avoids excessive impurity load on a single filter surface, effectively delaying filter surface clogging. The tangential pipes employ a curved surface-adhering structure of vertical and arc-shaped filter plates, eliminating filtration dead angles, preventing the adhesion and accumulation of flexible debris, and improving water flow smoothness. At the same time, the three pipe sections are equipped with flanged splicing of three-stage spiral blade groups and arc-shaped guide walls to achieve graded swirling flow, allowing water to flow in stages. The device continuously generates stable centrifugal force, which, combined with the curved conical shape and converging structure at the end of the terminal pipe, ensures that heavy sediment converges towards the conical opening without any dead angles under the combined effects of centrifugal force, gravity, and curved surface guidance. This reduces the accumulation of sediment and impurities in the flow channel from the source. The main body of the device is divided into a three-section modular structure: the initial pipe, the splicing pipe, and the terminal pipe. The number of splicing pipes can be flexibly increased or decreased according to the actual length of the greenway, adapting to the drainage needs of greenways of different lengths. All functional units of the device are connected by a method... The standardized interface design, including flange connection, socketing, and embedding, eliminates the need for welding or casting for fixed connections. This not only reduces the difficulty of factory prefabrication, on-site transportation, and assembly, but also allows for flexible replacement of the spiral blade assembly and filter plate specifications based on the sediment content and waste type in different sections of the greenway, achieving precise adaptation to working conditions. The standardized interfaces also ensure that on-site installation and assembly of the device better conform to municipal engineering construction standards. Both the spiral blade assembly and the tangential pipe filter plate adopt a detachable structure, allowing for quick removal, cleaning, maintenance, and replacement without disassembling the main body of the device. The sedimentation filter tank at the end of the terminal pipe features an integrated design for silt collection and secondary filtration of mud and water. The pull-out filter tank, combined with a top inspection cover, allows for easy cleaning of sediment simply by opening the inspection cover and lifting the filter tank via the handle, eliminating the need for excavating underground trenches. Furthermore, the filter tank achieves efficient separation of mud and water, preventing sewage leakage during cleaning. The arc-shaped conical opening and the sedimentation filter tank are connected by a flange seal with a rubber gasket, effectively preventing groundwater leakage and backflow of municipal rainwater. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded front view of the three-dimensional structure of the present invention; Figure 3 This is an exploded rear-view perspective view of the three-dimensional structure of the present invention; Figure 4 This is an exploded cross-sectional view of the end tube of the present invention; Figure 5 This is an exploded three-dimensional view of the sedimentation filter tank of the present invention.

[0017] In the diagram: 1. Initial pipe body; 2. Splicing pipe body; 3. Final pipe body; 4. First tangential pipe; 5. Second tangential pipe; 6. Third tangential pipe; 7. Tangential opening; 8. Vertical filter plate; 9. Arc-shaped filter plate; 10. Trench cover; 11. Inner cavity; 12. Arc-shaped guide wall; 13. Initial fixing plate; 14. First spiral blade assembly; 15. Second spiral blade assembly; 16. Third spiral blade assembly; 17. Splicing flange; 18. Arc-shaped cone; 19. Arc-shaped cone opening; 20. Sludge filter tank; 21. Connection inlet; 22. Connection flange; 23. Fixing flange; 24. Connection outlet; 25. Embedded cavity; 26. Filter tank; 27. Filter tank opening; 28. Post-filtration cavity; 29. ​​Handle; 30. Inspection cover. Detailed Implementation

[0018] 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0019] Please see Figure 1-5 This invention discloses a self-cleaning and anti-clogging filtration device for water supply and drainage ditches in greenways. The device adopts a multi-stage modular design, graded vortex flow, no dead-angle sludge collection, and detachable maintenance structure. It is suitable for drainage, filtration, sedimentation, and self-cleaning scenarios in water supply and drainage ditches of urban greenways, park trails, and municipal landscape roads. It can effectively solve the technical problems of traditional ditches such as easy clogging, siltation, need for excavation for maintenance, poor sealing, and easy backflow. The core innovation is that it does not rely on any external power such as electricity, mechanical transmission, hydraulics, or pneumatics throughout the process. It achieves complete self-cleaning without any power by relying solely on the kinetic energy of the water flow itself, centrifugal force, gravity, and the synergistic effect of the arc-shaped curved surface.

[0020] This device mainly consists of a multi-stage modular pipe body and a sedimentation filter tank 20 that are sequentially sealed and connected.

[0021] The multi-stage modular pipe body includes an initial pipe body 1, at least one splicing pipe body 2, and an end pipe body 3. The pipe bodies are connected by a flange structure to achieve detachable and sealed splicing. The number of splicing pipe bodies 2 can be flexibly increased or decreased according to the actual laying length of the greenway ditch to adapt to different drainage conditions and meet the requirements of factory prefabrication, rapid on-site assembly, and low-disturbance construction.

[0022] In the above, the initial pipe body 1, the splicing pipe body 2, and the final pipe body 3 are all provided with an inner cavity 11. The inner wall of the inner cavity 11 is provided with an arc-shaped guide wall 12. The arc-shaped guide wall 12 is a smooth curved surface structure formed in one piece. It extends along the water flow direction, which can eliminate dead corners on the inner wall, guide the water flow to form a stable vortex, and reduce the adhesion and accumulation of silt and impurities.

[0023] Furthermore, the side walls of the initial pipe body 1, the splicing pipe body 2, and the final pipe body 3 are respectively connected to a first tangential pipe 4, a second tangential pipe 5, and a third tangential pipe 6. Each tangential pipe has a tangential opening 7, forming a tangential water inlet assembly, allowing water to enter the pipe body tangentially, providing the basic conditions for swirling centrifugal sedimentation. The top ends of the first tangential pipe 4, the second tangential pipe 5, and the third tangential pipe 6 are all detachably connected to trench covers 10. The top surface of the trench covers 10 remains flat and is compatible with the greenway paving surface, which can protect the internal components of the tangential pipes without compromising the overall landscape effect of the greenway.

[0024] It should be noted that a tiered filtration structure is detachably fitted inside the tangential opening 7. The tiered filtration structure includes an integrally formed vertical filter plate 8 and an arc-shaped filter plate 9. The shape of the arc-shaped filter plate 9 is perfectly matched with the inner curved surface of the tangential tube, eliminating dead angles in filtration and preventing leaves, weeds, and fibrous flexible waste from adhering and accumulating, causing blockage. Both the vertical filter plate 8 and the arc-shaped filter plate 9 are porous filtration structures, which can achieve step-by-step interception of mixed impurities, reduce the load on a single filter surface, effectively delay filter surface blockage, and improve water flow.

[0025] Meanwhile, in the inner cavity 11 of the initial pipe body 1, the splicing pipe body 2, and the final pipe body 3, there are corresponding first spiral blade group 14, second spiral blade group 15, and third spiral blade group 16. Each group of spiral blades is coaxially arranged and adapted to the corresponding inner cavity 11 of the pipe body, together forming a graded vortex structure, so that the water flow continuously obtains stable centrifugal force in the step-by-step flow process, and achieves efficient separation of heavy sediment and light garbage and water. Specifically, each blade assembly is passively rotated and connected to a fixed plate inside the pipe via bearings, bushings, and other components. It does not utilize any power mechanisms such as motors, hydraulic systems, or pneumatic systems; it relies solely on the impact force of the greenway runoff to drive the blade assembly's autonomous rotation. Tangential water inflow provides the initial tangential velocity, directly impacting the helical blades to generate rotational torque, causing the blade assembly to rotate smoothly. The rotating blades, in conjunction with the arc-shaped guide wall, force the water flow to form a continuous and stable strong swirling field. The three-stage swirling flow is a progressively enhanced separation process with coaxial linkage: the first-stage swirling flow (initial pipe body): the blades initially create swirling, separating large particles of sediment; the second-stage swirling flow (joining pipe body): the blades work together to increase the swirling intensity, separating medium-sized particles of sediment; the third-stage swirling flow (final pipe body): the swirling intensity reaches its peak, deeply separating fine sediment. The three-stage blades rotate synchronously and coaxially, progressively enhancing the swirling effect along the water flow direction, achieving a gradual solid-liquid separation from coarse to fine.

[0026] The initial fixing plate 13 is fixedly installed at the end of the initial pipe body 1. The initial fixing plate 13 is an annular flange structure. One end of the first spiral blade group 14 is fixedly connected to the initial fixing plate 13 by flange bolts to achieve end positioning and coaxial installation. The splicing flange 17 is detachably connected to the adjacent blade group by bolts, which is convenient for individual disassembly, cleaning, replacement or adjustment of blade specifications according to water flow speed to adapt to different working conditions.

[0027] The end of the final pipe body 3 is integrally formed with an arc-shaped, dead-angle-free silt collection structure, specifically an arc-shaped cone 18. The arc-shaped cone 18 has a gradually narrowing arc-shaped conical opening 19 inside, with a smooth, seamless curved transition. This allows heavy silt to smoothly converge towards the conical opening under the combined effects of centrifugal force, gravity, and the curved surface's guiding force, reducing silt residue accumulation at the source. This is one of the core structures for achieving powerless self-cleaning. A fixed flange 23 is fixedly installed on the outside of the arc-shaped conical opening 19. A connection inlet 21 is correspondingly provided on the sedimentation filter tank 20. A connection flange 22 is fixedly installed on the outside of the connection inlet 21. A rubber sealing gasket is sandwiched between the fixed flange 23 and the connection flange 22, and bolts are used for sealing, forming a reliable sealing structure that effectively prevents groundwater leakage, municipal rainwater backflow, and the return of deposited silt to the side ditch channel.

[0028] The sedimentation filter tank 20 has an embedded cavity 25 inside, within which a filter tank 26 is fitted with a gap. The filter tank 26 can be vertically pulled upwards for easy disassembly and installation, enabling quick maintenance without excavation. The filter tank 26 has a filter tank opening 27 on the side facing the connection inlet 21. The filter tank opening 27 has the same diameter as the connection inlet 21 and is coaxially connected to ensure smooth water flow. The tank wall of the filter tank 26 has a porous water filtration structure, forming a post-filtration cavity 28 inside, which can perform secondary separation of the sludge and water after vortex settling, further intercepting fine impurities and improving the quality of the discharged water. The top of the filter tank 26 is fixedly equipped with a handle 29 for easy manual lifting and removal for dredging operations; the top of the sediment filter tank 20 is hinged with a maintenance cover 30, which is equipped with a snap-locking structure, making it easy to open and reliable to close. During dredging and maintenance, it is only necessary to open the maintenance cover 30 and pull the filter tank 26 upwards through the handle 29 to complete the dredging. There is no need to excavate underground trenches throughout the process, and the integrity of the greenway paving and landscape is not damaged.

[0029] The sedimentation filter tank 20 has a connection outlet 24 on the side away from the connection inlet 21. The connection outlet 24 is coaxial with the connection inlet 21. A standardized connection flange 22 is fixed on the outside of the connection outlet 24, which can be directly connected to the municipal drainage network to achieve the orderly discharge of filtered and purified water.

[0030] Working Principle: Rainwater from the greenway surface carries a heterogeneous mixture of impurities such as fallen leaves, tree branches, silt, and lightweight household waste. It first flows sequentially through the tangential openings 7 on the first tangential pipe 4, the second tangential pipe 5, and the third tangential pipe 6, completing a three-stage pre-filtration process. The rainwater first enters the tangential opening 7 of the first tangential pipe 4 on one side of the main pipe body 1. The vertical filter plate 8, fitted onto the inner wall of the tangential opening 7, initially intercepts large-volume impurities. The arc-shaped filter plate 9, fixedly connected to its end, conforms to the curved surface of the flow channel of the first tangential pipe 4, simultaneously intercepting medium-sized impurities passing through the vertical filter plate 8, thus achieving primary pre-filtration. The trench cover 10 at the top of the first tangential pipe 4 protects this filtration unit and conforms to the greenway landscape design requirements. The rainwater, having completed primary filtration, then enters... The rainwater enters the second tangential pipe 5 on one side of the splicing pipe body 2 through the tangential opening 7. The vertical filter plate 8 and the arc-shaped filter plate 9 on the inner wall perform secondary pre-filtration of the medium and small particle size impurities remaining in the water flow. The trench cover 10 at the top of the second tangential pipe 5 simultaneously provides protection and landscape adaptation. The rainwater, after secondary filtration, continues to flow into the third tangential pipe 6 on one side of the end pipe body 3 through the tangential opening 7. The vertical filter plate 8 and the arc-shaped filter plate 9 on the inner wall perform final tertiary pre-filtration of the remaining fine particle size impurities in the water flow. The trench cover 10 at the top of the third tangential pipe 6 completes the protection of this filtration unit and adapts to the greenway landscape. The rainwater, after completing the tertiary filtration through the tangential opening 7, sequentially enters the inner cavity 11 opened inside the initial pipe body 1, the splicing pipe body 2, and the end pipe body 3 for multi-stage swirling solid-liquid separation. The rainwater first... The water enters the inner cavity 11 of the initial pipe body 1. The arc-shaped guide wall 12 on the outer wall of the inner cavity 11 provides basic guidance for the water flow. The initial fixing plate 13 fixed on one side of the initial pipe body 1 enables the end of the first spiral blade assembly 14 to rotate. Under the natural impact of the water flow, the first spiral blade assembly 14 drives the rainwater to swirl along the arc-shaped guide wall 12. The centrifugal force generated throws the heavy sediment in the water flow to the outside of the channel, realizing the first-stage swirling separation. The rainwater that has completed the first-stage swirling enters the inner cavity 11 of the splicing pipe body 2. After being guided by the arc-shaped guide wall 12, it impacts the second spiral blade assembly 15 in the inner cavity 11 to form a second-stage swirling, further enhancing the separation effect of sediment and light garbage and water flow. The second spiral blade assembly 15 is connected to the first spiral blade assembly 14 through the splicing flange 17. The flange is fixed to ensure the connection stability of the two-stage helical blade assembly and the continuity of the swirling motion. The rainwater, after passing through the second-stage swirling flow, continues to enter the inner cavity 11 of the final pipe body 3. After being guided by the arc-shaped guide wall 12, it impacts the third helical blade assembly 16 inside the inner cavity 11. The third helical blade assembly 16 is flange-connected to the second helical blade assembly 15 through the splicing flange 17, which drives the rainwater to form a three-stage enhanced swirling flow. This allows the heavy sediment remaining in the water flow to be fully thrown to the outside of the flow channel, achieving deep swirling separation of sediment and water flow. The deeply separated water flow, carrying the heavy sediment concentrated by the three-stage swirling flow, flows along the flow channel to the arc-shaped cone 18 fixedly connected at the end of the final pipe body 3. The curved converging structure of the arc-shaped cone 18 allows the sediment to be subjected to the triple action of centrifugal force, gravity, and curved guide flow.It converges without dead ends into the arc-shaped conical opening 19 formed in the arc-shaped cone 18, completely avoiding sediment deposition and residue in the flow channel. The converged sediment and a small amount of rainwater flow out naturally through the arc-shaped conical opening 19. The fixed flange 23 fixed on the outer side of the arc-shaped conical opening 19 and the connecting flange 22 fixed on the outer side of the connecting inlet 21 opened at the corresponding position of one side of the sedimentation filter tank 20 for the arc-shaped conical opening 19 achieve precise flange sealing connection, ensuring both the smooth transportation of sediment and rainwater and effectively preventing underground muddy water leakage and municipal rainwater backflow. The sediment and rainwater enter the interior of the sedimentation filter tank 20 smoothly through the connecting inlet 21. The sediment and rainwater that enter the sedimentation filter tank 20 enter the interior of the filter tank 26 through the filter tank opening 27 opened at the corresponding position of one side of the filter tank 26 embedded and connected in the embedded cavity 25 formed in the sedimentation filter tank 20 for the connecting inlet 21, realizing the final integrated separation of muddy water. Among them, the rainwater penetrates through the filter layer of the filter tank 26 and enters the post-filter cavity 28 formed in the filter tank 26, and smoothly discharges along the connecting discharge outlet 24 opened at the corresponding position of the other side of the sedimentation filter tank 20 for the connecting inlet 21. The connecting flange 22 fixed on the outer side of the connecting discharge outlet 24 can achieve standardized connection with the municipal rainwater pipe network or the greenway infiltration system, meeting the adaptation requirements of different sewage discharge scenarios. The heavy sediment is completely intercepted by the filter tank 26 and temporarily stored in the tank, completing the centralized collection of sediment. When the sediment in the filter tank 26 accumulates to a preset amount, the maintenance personnel can open the inspection cover 30 provided at the top of the sedimentation filter tank 20, and quickly pull out the filter tank 26 from the embedded cavity 25 through the handle 29 fixedly connected to the top of the filter tank 26, completing the convenient cleaning of the sediment. After the cleaning is completed, the filter tank 26 is re-embedded into the embedded cavity 25, and the inspection cover 30 is closed to quickly restore the normal operation of the device. There is no need to excavate the underground trench body and disassemble the main body of the device throughout the process, greatly reducing the difficulty and cost of maintenance operations. During the entire working process, the three-section structure of the initial pipe body 1, the splicing pipe body 2, and the end pipe body 3 realizes flexible adaptation to the linear laying of the greenway. The standardized connection of the first spiral blade group 14, the second spiral blade group 15, and the third spiral blade group 16 through the splicing flange 17 ensures the stability and coherence of the multi-stage swirling motion. The vertical filter plates 8 and arc-shaped filter plates 9 supporting each tangential pipe, the arc-shaped guide walls 12 in the inner cavity 11 of each pipe body, and the arc-shaped cone 18 at the end of the end pipe body 3 all adopt curved surface structure designs, completely eliminating all dead ends in the flow channels and filtering links within the device.,

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and motion conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.,

[0032] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0033] Additionally, "multiple" refers to two or more.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. A self-cleaning and anti-clogging filter device for water supply and drainage ditches along greenways, characterized in that, include: A multi-stage modular pipe body and a sedimentation filter tank (20) are sequentially sealed and connected. The sidewall of the multi-stage modular pipe is connected to a tangential water inlet assembly, which contains a detachable graded filtration structure. The multi-stage modular tube body is equipped with a coaxially arranged spiral blade group and an arc-shaped guide wall (12) to form a graded swirling centrifugal sedimentation channel; The end of the multi-stage modular pipe is provided with an arc-shaped mud collection structure without dead angles, and the arc-shaped mud collection structure without dead angles is sealed and connected to the sedimentation filter tank (20); The sedimentation filter tank (20) is equipped with a mud-water separation filter component that can be vertically pulled out, so as to achieve self-cleaning and anti-clogging without power.

2. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 1, characterized in that: The multi-stage modular pipe body includes an initial pipe body (1), at least one splicing pipe body (2) and an end pipe body (3). Each pipe body is detachably spliced ​​using flanges, and the number of splicing pipe bodies (2) can be increased or decreased to adapt to different lengths of greenway side ditches.

3. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 2, characterized in that: The tangential water inlet assembly includes a first tangential pipe (4), a second tangential pipe (5), and a third tangential pipe (6) respectively disposed on the initial pipe body (1), the splicing pipe body (2), and the final pipe body (3); Each tangential pipe has a tangential opening (7), and the top of the tangential opening (7) is fitted with a trench cover (10) that is flush with the greenway paving.

4. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 3, characterized in that: The graded filtration structure includes an integrally formed vertical filter plate (8) and an arc-shaped filter plate (9). The arc-shaped filter plate (9) is fitted with the curved surface of the inner wall of the tangential tube to eliminate dead angles in filtration. Both the vertical filter plate (8) and the arc-shaped filter plate (9) are porous structures and can be detachably fitted into the tangential opening (7).

5. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 2, characterized in that: The spiral blade assembly includes a first spiral blade assembly (14), a second spiral blade assembly (15), and a third spiral blade assembly (16) correspondingly disposed in the initial pipe body (1), the splicing pipe body (2), and the final pipe body (3). Adjacent spiral blade assemblies are detachably connected by splicing flanges (17). The initial tube body (1) is provided with an initial fixing plate (13) at the end, and the first spiral blade group (14) is fixed to the flange of the initial fixing plate (13).

6. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 2, characterized in that: The arc-shaped mud collection structure without dead angle is an arc-shaped cone (18) integrally formed at the end of the end pipe (3), and the arc-shaped cone (18) is provided with a tapered arc-shaped cone opening (19). The arc-shaped conical inlet (19) and the sludge filter tank (20) are connected by a flange clamping gasket (21) to achieve a sealed connection, preventing leakage and backflow.

7. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 1, characterized in that: The mud-water separation filtration assembly includes a filter tank (26) that is fitted into the cavity (25) of the sedimentation filter tank (20) with a gap fit. The side wall of the filter tank (26) is a porous water filtration structure, and the interior forms a post-filtration cavity (28). The filter tank (26) is provided with a filter tank opening (27) that is coaxially connected to the connection inlet (21), and a handle (29) is provided at the top. The top of the sedimentation filter tank (20) is hinged with an inspection cover (30) with a snap-lock.

8. The self-cleaning and anti-clogging filter device for greenway water supply and drainage ditches according to claim 6, characterized in that: The sedimentation filter tank (20) has a coaxial connection outlet (24) on the side away from the connection inlet (21), and a standardized flange interface for connecting to the municipal drainage network is provided on the outside of the connection outlet (24).

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