River self-flow water body circulating purification water conservancy equipment

Abstract

The application discloses a kind of river self-flow water body circulating purification water conservancy equipment, belong to river water quality purification technical field.This equipment includes installation base, and installation base top is provided with purification assembly, and purification assembly top is provided with filter assembly;Double-cylinder rotary stirring structure is equipped in purification assembly, and water flow impact is used to drive stirring paddle rotation, and three-layer cap-shaped filter screen is used to realize step-by-step filtration and automatic deslagging;Filter assembly uses water storage gravity to drive air pressure backwashing, and top ecological filter layer is used to realize depth purification.This equipment relies on river natural water level difference to drive all mechanical actions, without power and sensor, can realize online stirring anti-blocking, automatic backwashing filter layer, graded deslagging, effectively solve the problem that filter layer of existing equipment is prone to blockage, cleaning and maintenance are cumbersome, significantly improve filtration efficiency, extend maintenance-free period, and be applicable to natural drop river in-situ water quality purification engineering.

Description

Technical Field

[0001] This invention relates to the field of river water purification and water conservancy engineering equipment, and in particular to a water conservancy equipment for the circulation and purification of water bodies in rivers by gravity flow. Background Technology

[0002] This invention relates to a river water circulation and purification device, whose name, "river water circulation and purification device," is the main attribute of the device. It refers to a specialized water purification device applied to in-situ treatment of natural rivers, used for circulating filtration and water quality improvement of river water. "Self-flowing" is the core functional qualifier, indicating that the device does not require an external power source and relies entirely on the gravitational potential energy generated by the natural water level difference in the river to drive the entire purification process. This device, through the combination of a built-in hydraulically driven rotary stirring structure, a multi-stage cap-shaped filter and slag discharge structure, and a gravity-storage pneumatic backwashing structure, simultaneously completes graded filtration, online anti-clogging, automatic slag discharge, and filter layer unblocking during the downward flow of water, truly achieving continuous circulation and purification of river water under powerless conditions.

[0003] In in-situ purification projects for small and medium-sized rivers with natural water level differences, existing conventional gravity-flow purification devices mostly adopt fixed multi-layer filter media or flat filter screen structures, relying on natural water infiltration to achieve impurity interception and water purification. However, in actual long-term operation, there are many drawbacks: silt, fallen leaves, and various suspended impurities carried by the river water will continuously settle on the surface of the filter layer. Fine silt particles embedded in the gaps of the filter media are prone to forming caking, which will cause blockage of the filter pores in a short time, resulting in a significant decrease in the water flow rate and a continuous decline in the purification effect. Existing fixed filter layers do not have online unblocking capabilities. Once blockage occurs, the water intake must be stopped, and the equipment must be manually disassembled to remove impurities and replace the filter media. This is not only cumbersome and costly to operate, but also interrupts the continuous purification process of the river water. Meanwhile, most equipment lacks tiered filtration and a smooth automatic slag discharge structure, causing impurities of different particle sizes to accumulate on the same filtration interface, further accelerating the filter layer clogging process. The filtered residue also lacks a regular collection area and convenient cleaning channel, making daily maintenance difficult in outdoor river scenarios. Some purification equipment with anti-clogging functions relies on external electricity to drive the stirring and backwashing mechanisms, requiring the installation of power lines, resulting in high infrastructure costs and making it unsuitable for remote rivers without power supply, thus contradicting the low-energy consumption and low-cost design principles of gravity-flow purification facilities. Therefore, a river gravity-flow water circulation purification system is proposed to address these issues. Summary of the Invention

[0004] To overcome the above deficiencies, the present invention aims to provide a water purification device for river gravity-flow water circulation, so as to solve the problems of easy clogging of filter layers and cumbersome cleaning and maintenance mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a river gravity-flow water circulation and purification water conservancy device, including an installation base for supporting the water body, a filter assembly installed on the top of the installation base, and a purification assembly installed on the top of the filter assembly. The purification assembly includes two mounting cylinders for mounting and supporting the components. A rotating shaft is mounted vertically in the middle of each mounting cylinder. Three layers of filter screens are equidistantly mounted on the surface of each rotating shaft in the vertical direction. Each layer of filter screen has filter holes on its upper surface. A mounting ring is fitted on the surface of the rotating shaft above each layer of filter screen. A stirring blade is equidistantly mounted on the circumferential surface of each mounting ring. A slag discharge port is horizontally opened on the side of the two mounting cylinders that is far apart from each other, corresponding to the lower end of each layer of filter screen. The filter assembly includes a diversion pool connected to the lower ends of two mounting cylinders, and two mounting discs are mounted on the top of the diversion pool. A filter cloth is installed on the lower inner wall of each mounting disc, and spring damping rods are installed at the four corners of the lower surface of each mounting disc. A water storage tank is installed at the lower end of the four spring damping rods. A U-shaped pressure sleeve is installed on the lower surface of the mounting disc located in the middle of the four spring damping rods, and a filling mesh grid is installed at the upper end of each mounting disc.

[0006] As a further improvement to the above technical solution: two support beams are installed at the upper and lower ends of each mounting cylinder, and a deep groove ball bearing is horizontally embedded in each support beam; two corresponding deep groove ball bearings along the vertical direction are respectively sleeved on the upper and lower ends of the rotating shaft.

[0007] As a further improvement to the above technical solution: each set of stirring blades and each layer of filter screen are installed at a 30° angle, and the angled setting can be adapted to the water flowing down from above.

[0008] As a further improvement to the above technical solution: each layer of the filter screen is a cap shape with the opening facing upwards, and the diameter of the filter holes on the upper surface of the three layers of filter screens decreases sequentially along the vertical direction; the filter holes can achieve step-by-step filtration and are inclined to adapt to the water flowing down from above.

[0009] As a further improvement to the above technical solution: a folding ring is installed on the lower surface of each mounting plate, and a mounting mesh is installed in the middle of each folding ring; a through pipe is embedded at each of the four nodes on the upper surface of the mounting mesh, and the through pipe is used to transport air upward.

[0010] As a further improvement to the above technical solution: the inside of the filling mesh grid is filled with a layer of pebbles, and the top of the pebble layer is filled with a layer of sand and aquatic plants; ecological filtration is achieved by relying on the pebble layer and the sand and aquatic plant layer, and the material cost is low.

[0011] As a further improvement to the above technical solution: each of the mounting cylinders is connected to a conical guide funnel at its upper end, and each of the conical guide funnels has a threaded acceleration groove on its inner wall.

[0012] As a further improvement to the above technical solution: a partition plate is installed in the middle of the front-to-back direction inside the diversion pool, and square openings are provided on the four side walls of the water storage tank; when the water storage tank is full, the spring damping rod is stretched and drives the water storage tank to descend, and air is drawn into the cavity; when the upper filter layer is blocked and the water inflow decreases, the water in the water storage tank is gradually discharged and the weight is reduced, the spring damping rod rebounds and drives the water storage tank to rise, and the square opening cooperates with the U-shaped pressure sleeve to squeeze the internal air. The air rises back to fill the filling material in the mesh grid, achieving the anti-clogging effect.

[0013] As a further improvement to the above technical solution: drainage outlets are provided on both the left and right sides of the mounting base, and a support frame is installed on the outer side of the upper surface of the mounting base. Two grille doors are movably connected to both the left and right sides of the support frame via hinges.

[0014] As a further improvement to the above technical solution: the front and rear sides of the support frame are both mesh-like and hollowed out. The filtered impurities discharged from the slag discharge port fall to the outer perimeter of the top of the mounting base. This area is separated from the water passage cavity inside the mounting base. The staff can open the grille door to clean it regularly.

[0015] The present invention has the following beneficial effects: By incorporating a hydraulically driven rotary stirring structure within the purification unit, the water flow impact drives the stirring blades to rotate, continuously agitating the water above the filter layer. This prevents suspended solids from rapidly depositing and caking on the filter screen surface, achieving online stirring and anti-clogging of the filter layer, delaying clogging time, reducing the frequency of manual cleaning, and lowering maintenance labor costs.

[0016] By setting up a gravity-driven air pressure backwashing structure in the filter assembly, the change in the weight of the water in the storage tank drives the spring to extend and retract, compressing air to form a high-pressure airflow, which automatically backwashes the ecological filter layer. It can clear the filter layer by itself without electricity or manual operation, ensuring the long-term stable water flow efficiency of the filter layer and solving the problem of needing to shut off the water and disassemble for cleaning after the filter layer is blocked.

[0017] By setting up a three-layer cap-shaped filter screen with progressively smaller filter holes, the system achieves graded filtration of suspended solids and automatic slag discharge. Impurities of different particle sizes are intercepted by the corresponding filter screens and automatically discharged from the slag discharge port, which can improve filtration accuracy and overall purification effect, enabling the equipment to operate stably for a long time and reducing maintenance workload. Attached Figure Description

[0018] Figure 1This is a three-dimensional schematic diagram of a water purification device for river gravity-flow water circulation proposed in this invention. Figure 2 This is a schematic cross-sectional view of a water purification device for river gravity-flow water circulation proposed in this invention. Figure 3 for Figure 2 Enlarged view of the left side of the middle section; Figure 4 This is a schematic diagram of the structure of a water purification device for river gravity-flow water circulation proposed in this invention; Figure 5 for Figure 4 Enlarged view of part A in the middle; Figure 6 This is a three-dimensional schematic diagram of the installation panel of a water purification device for river gravity-flow water circulation proposed in this invention; Figure 7 This is a schematic diagram of the through-pipe installation structure of a water conservancy device for river gravity-flow water circulation and purification proposed in this invention; Figure 8 This is a schematic diagram of the support frame and grille structure of a water purification device for river gravity-flow water circulation proposed in this invention; Figure 9 This is a schematic diagram of the slag discharge port structure of a water purification device for river gravity-flow water circulation proposed in this invention.

[0019] Legend: 1. Mounting base; 2. Purification assembly; 201. Mounting cylinder; 202. Rotating shaft; 203. Filter screen; 204. Filter hole; 205. Mounting ring; 206. Stirring blade; 207. Slag discharge port; 208. Support beam; 209. Deep groove ball bearing; 210. Conical guide funnel; 211. Threaded acceleration groove; 3. Filter assembly; 301. Diversion tank; 302. Mounting plate; 303. Filter cloth; 304. Spring damping rod; 305. Water storage tank; 306. U-shaped pressure sleeve; 307. Filling mesh grid; 308. Divider plate; 309. Square opening; 310. Folding ring; 311. Mounting mesh grid; 312. Through pipe; 313. Pebble layer; 314. Sand and aquatic plant layer; 4. Drainage outlet; 5. Support frame; 6. Grille door. Detailed Implementation

[0020] 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.

[0021] Reference Figures 1-9 One embodiment provided by the present invention: A water purification device for river gravity-flow water circulation includes a mounting base 1 for supporting the water, a filter assembly 3 mounted on the top of the mounting base 1, and a purification assembly 2 mounted on the top of the filter assembly 3. As a further improvement to the above technical solution: the purification component 2 includes two mounting cylinders 201 for mounting and bearing. A rotating shaft 202 is mounted vertically in the middle of each mounting cylinder 201. Three layers of filter screens 203 are equidistantly mounted vertically on the surface of each rotating shaft 202. Each layer of filter screen 203 has filter holes 204 on its upper surface. A mounting ring 205 is fitted on the surface of the rotating shaft 202 above each layer of filter screen 203. A stirring blade 206 is equidistantly mounted circumferentially on the annular surface of each mounting ring 205. A slag discharge port 207 is horizontally opened on the side of the two mounting cylinders 201 that is far apart from each other, corresponding to the lower end of each layer of filter screen 203. Two supporting beams 208 are mounted at the upper and lower ends of each mounting cylinder 201. A deep groove ball bearing 209 is horizontally embedded in each supporting beam 208. Two deep groove ball bearings 209 corresponding to each other vertically are respectively fitted on the upper and lower ends of the rotating shaft 202. Each set of stirring blades 206 and each layer of filter screen 203 are installed at a 30° angle, which can be adapted to water flowing down from above. Each layer of filter screen 203 is cap-shaped with the opening facing upwards, and the diameter of the filter holes 204 on the upper surface of the three layers of filter screen 203 decreases sequentially from top to bottom; the filter holes 204 can achieve step-by-step filtration, and the angled setting is adapted to water flowing down from above. Each mounting plate 302 has a folding ring 310 installed on its lower surface, and each folding ring 310 has a mounting grid 311 installed in the middle; each of the four nodes on the upper surface of the mounting grid 311 has a through pipe 312 embedded in it, which is used to transport air upwards. The inside of the filling grid 307 is filled with a pebble layer 313, and a sand and aquatic plant layer 314 is filled on top of the pebble layer 313; ecological filtration is achieved by relying on the pebble layer 313 and the sand and aquatic plant layer 314, and the material cost is low. Each mounting cylinder 201 has a conical guide funnel 210 connected to its upper end, and each conical guide funnel 210 has a threaded acceleration groove 211 on its inner wall.

[0022] Specifically, by adopting a vertical purification structure with two parallel cylinders, the river water entering the equipment can be diverted into two independent chambers for simultaneous filtration, thereby increasing the water treatment throughput per unit time and adapting to the needs of river layouts of different widths. The conical guide funnel's converging structure gathers and guides the water flowing in from above, while the threaded acceleration grooves on the inner wall of the funnel accelerate the descending water flow, increasing the linear velocity of the water impacting the lower impellers. This enhances the driving force of the rotating shaft, ensuring stable operation of the mixing structure even under low water level conditions. The use of two sets of support beams with deep groove ball bearings suspends the rotating shaft at the central axis of the mounting cylinder, preventing frictional interference between the shaft and the cylinder wall. This reduces rotational resistance, improves operational smoothness, and simultaneously supports the overall weight of the rotating shaft and associated filtration and mixing components, ensuring long-term structural stability. By equidistantly arranged three layers of cap-shaped filter screens along the vertical direction on the surface of the rotating shaft, with the filter hole diameter decreasing from top to bottom, suspended impurities in the water are graded and intercepted. Large particles are intercepted by the upper filter screen, while medium and small particles are intercepted by the middle and lower filter screens in sequence, achieving the effect of step-by-step filtration and stratified sludge removal, thus preventing the concentrated accumulation of impurities of different sizes and accelerating filter screen clogging. The continuous impact of the downward-flowing water on the inclined stirring blades converts the gravitational potential energy of the water flow into the rotational kinetic energy of the rotating shaft, thereby driving the mounting ring and stirring blades to rotate synchronously with the rotating shaft, achieving the effect of continuously agitating the water on the filter screen surface. This effectively prevents suspended solids from depositing and caking on the filter screen surface, realizing online anti-clogging during the filtration process. By opening horizontal slag discharge ports at the lower ends of each filter screen on the side wall of the installation cylinder, combined with the inclined slope of the cap-shaped filter screen and the swirling thrust of the water flow, impurities trapped on each filter screen can automatically slide along the slope to the slag discharge ports and be discharged outside the cylinder. This achieves automatic slag discharge during the filtration process, reducing filter screen slag accumulation and extending the continuous operation cycle. Utilizing the extensible and deformable characteristics of the folded ring, it expands and contracts synchronously during the raising and lowering of the water storage tank, thereby maintaining the sealing of the cavity between the water storage tank and the installation plate, ensuring pressure stability during the air pressure backwash process, and enhancing the backwashing force. An ecological filtration structure is adopted, with layers of pebbles and sand / aquatic plants filled within the mesh grid. The physical adsorption and pore trapping of the pebble layer further remove fine impurities from the water, while the adsorption of pollutants by the plant roots and microbial degradation of the sand / aquatic plants purifies the pollutants in the water, achieving deep ecological purification and improving the quality of the effluent. Furthermore, the filter media is readily available and inexpensive, making it suitable for low-cost deployment in field river engineering projects.

[0023] As a further improvement to the above technical solution: the filter assembly 3 includes a diversion pool 301 connected to the lower ends of the two mounting cylinders 201. Two mounting plates 302 are installed on the top of the diversion pool 301. A filter cloth 303 is installed on the lower surface of the inner wall of each mounting plate 302. Spring damping rods 304 are installed at the four corners of the lower surface of each mounting plate 302. A water storage tank 305 is installed at the lower end of the four spring damping rods 304. A U-shaped pressure sleeve 306 is installed on the lower surface of the mounting plate 302 located in the middle of the four spring damping rods 304. A filling mesh grid 307 is installed on the upper end of each mounting plate 302. A partition plate 308 is installed in the middle of the front-to-back direction inside the diversion tank 301, and square openings 309 are opened on the four side walls of the water storage tank 305. When the water storage tank 305 is full, the spring damping rod 304 is stretched and drives the water storage tank 305 to descend, and air is drawn into the cavity. When the upper filter layer is blocked and the water inflow decreases, the water in the water storage tank 305 is gradually discharged and the weight is reduced. The spring damping rod 304 rebounds and drives the water storage tank 305 to rise. The square openings 309 and the U-shaped pressure sleeve 306 cooperate to squeeze the internal air. The air rises and backflows the filling material in the filling mesh grid 307 to achieve the anti-clogging effect.

[0024] Specifically, a diversion pool is used to evenly distribute the pre-treated water from the purification components, allowing the water to smoothly enter the mounting tray cavities on both sides. This avoids concentrated water flow impacting local filter layers, achieving a balanced filter layer load and extending the filter media's lifespan. The filter cloth laid on the lower surface of the mounting tray's inner wall performs primary fine filtration, trapping fine suspended particles remaining after multi-stage filtration. This provides pre-protection for the upper ecological filter layer, preventing fine sediment from embedding in the ecological filter media and causing caking. A structure using spring-damped rods at the four corners to suspend and support the water storage tank allows the tank to rise and fall smoothly according to changes in internal water volume. This utilizes the water's own weight to create a recyclable gravity-driven source, achieving backwashing without external power. By installing a U-shaped pressure sleeve in the center of the lower surface of the mounting plate, and cooperating with the square opening on the side wall of the pressure sleeve cavity during the rise of the water storage tank, the air in the closed cavity is rapidly compressed to form a high-pressure airflow. This airflow is then transported upwards through the through-pipe to the bottom of the filter media filled with mesh grids, achieving the effect of using air pressure to backwash and unclog the ecological filter layer. This effectively disperses accumulated debris and blockages within the filter layer, restoring its water flow capacity. By installing a partition plate inside the diversion tank, the tank cavity is divided into two independent water flow channels. This ensures that the water intake and backwashing processes of the two mounting plates do not interfere with each other, achieving the effect that backwashing on one side does not affect the normal filtration operation on the other side, thus ensuring continuous operation of the entire equipment.

[0025] As a further improvement to the above technical solution: Drainage outlets 4 are provided on both the left and right sides of the mounting base 1. A support frame 5 is installed on the outer side of the upper surface of the mounting base 1. Two grille doors 6 are movably connected to the left and right sides of the support frame 5 via hinges. The front and rear sides of the support frame 5 are mesh-like and perforated. Filtered impurities discharged from the slag discharge port 207 fall to the outer perimeter of the top of the mounting base 1. This area is separated from the water passage cavity inside the mounting base 1. Workers can open the grille doors 6 for periodic cleaning.

[0026] Specifically, by opening drainage outlets on both sides of the mounting base, the water, after being deeply purified by the filtration components, can smoothly drain from the equipment and flow back into the river, thus forming a complete water circulation path and continuously promoting the circulation and purification of river water. A circumferential support frame structure is used on the outside of the mounting base to provide external protection for the internal purification components, preventing large floating debris in the river from impacting the equipment cylinder, thus protecting the internal core structure and enhancing the equipment's impact resistance. The grid door structure connected by hinges on both sides of the support frame allows workers to directly open the doors from the outside of the equipment for internal cleaning operations, eliminating the need to disassemble the main structure and reducing maintenance difficulty while improving cleaning efficiency. By designing the front and rear sides of the support frame as a mesh-like perforated area, the connectivity of the water inside and outside the equipment is ensured, preventing the support frame from obstructing water circulation. It also confines discharged impurities, causing them to fall to the outer area at the top of the mounting base for easy collection and cleaning, thus optimizing maintenance convenience.

[0027] Working principle The equipment consists of a mounting base 1, a filter assembly 3, and a purification assembly 2 arranged sequentially from bottom to top. River water flows from the top of the equipment downwards due to the natural water level difference. It first enters the conical guide funnel 210 at the top of the purification assembly 2. The threaded acceleration groove 211 on the inner wall of the conical guide funnel 210 causes the falling water to form a vortex and accelerate. Subsequently, the water flow continuously impacts the stirring blades 206 below. The inclined stirring blades 206 generate circumferential rotational torque under the impact force of the water flow, which drives the mounting ring 205 and the rotating shaft 202 to rotate synchronously. The upper and lower ends of the rotating shaft 202 are supported on the crossbeam 208 through deep groove ball bearings 209 to ensure smooth and stable rotation. This converts the gravitational potential energy of the water flow into rotational kinetic energy, realizing continuous stirring without electric drive.

[0028] During the rotation of the rotating shaft 202, the stirring blades 206 above the three-layer filter screen 203 continuously sweep the surface of the filter screen, stirring the water above the filter screen to prevent suspended matter from settling. The water passes through the three-layer filter screen 203 from top to bottom, achieving graded filtration through the filter holes 204 with progressively smaller diameters on the upper surface of each layer of filter screen 203. This allows impurities of different particle sizes to be intercepted by the corresponding layer of filter screen. The cap-shaped structure of the filter screen 203 with its opening facing upwards, combined with the swirling effect of the water flow, causes the intercepted impurities to gradually slide along the inclined slope of the filter screen to the slag discharge port 207 on the side wall of the mounting cylinder 201, where they are automatically discharged to the outside of the mounting cylinder 201. Thus, online anti-clogging and automatic slag discharge are completed simultaneously during the filtration process, ensuring the continuous water flow capacity of the filter screen.

[0029] After being coarsely filtered through multiple stages by the purification component 2, the water flows downward from the lower end of the installation cylinder 201 into the diversion tank 301. The partition plate 308 inside the diversion tank 301 evenly distributes the water to the two side channels, which then enter the corresponding installation plate 302 cavity. The water permeates upward through the filter cloth 303 on the lower surface of the inner wall of the installation plate 302, further intercepting fine suspended particles. It continues upward through the filling mesh grid 307, and then passes through the ecological filtration of the pebble layer 313 and the sand and aquatic plant layer 314, removing suspended solids, silt, and some organic pollutants from the water. After deep purification, the water finally flows downward into the cavity of the installation base 1 at the bottom, and is discharged from the equipment through the drain outlets 4 on the left and right sides of the installation base 1 and flows back into the river, completing a single water purification cycle. The support frame 5 on the outside of the installation base 1 forms an outer protection for the internal components. The mesh hollow structure on its front and rear sides ensures water flow and at the same time blocks the impurities discharged from the slag discharge port 207, causing the impurities to fall into the outer area of ​​the top of the installation base 1 for easy collection by staff.

[0030] As the filtration process continues, impurities gradually accumulate in the filter media within the mesh grid 307, causing filter layer blockage. Water passing through the filter cloth 303 continuously flows into the water storage tank 305. When the water storage tank 305 is full, the weight of the water causes the water storage tank 305 to pull the spring damping rod 304 downwards, causing the water storage tank 305 to descend vertically away from the lower surface of the mounting plate 302. The folding ring 310 stretches synchronously with the descent of the water storage tank 305, creating negative pressure inside the cavity and drawing in outside air to store gas for backwashing. When the filter layer blockage worsens and the water inflow decreases, the water storage tank... As water gradually seeps out of 305, the overall weight is reduced. The elastic force of the spring damping rod 304 pushes the water storage tank 305 to return to its original position. The folding ring 310 contracts synchronously and maintains the sealing of the cavity. The square opening 309 on the side wall of the water storage tank 305 cooperates with the cavity of the U-shaped pressure sleeve 306 to compress the air in the closed space inside, forming a high-pressure airflow. The airflow is transported upward through the through pipe 312 on the installed grid 311 and backwashes the filter media layer in the filling grid 307, thereby breaking up the impurities accumulated in the gaps of the filter media, restoring the water flow of the filter layer, and realizing automatic backwashing and anti-clogging without power.

[0031] As the water in the water storage tank 305 is gradually discharged during the backwashing process, the spring damping rod 304 is stretched again, creating a negative pressure inside the cavity that draws in outside air to store gas for the next backwashing action. This cycle repeats, allowing the filter layer to automatically complete periodic unclogging. After the equipment has been running for a period of time, the staff can open the grille doors 6 on the left and right sides of the support frame 5 to clean the filter residue accumulated on the top of the mounting base 1, thus completing the daily maintenance of the equipment and ensuring the long-term stable purification efficiency of the equipment.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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. A water purification device for river gravity-flow water circulation, comprising a mounting base (1) for supporting the water, characterized in that: A filter assembly (3) is installed on the top of the mounting base (1), and a purification assembly (2) is installed on the top of the filter assembly (3); The purification component (2) includes two mounting cylinders (201) for mounting and supporting. A rotating shaft (202) is mounted in the middle of each mounting cylinder (201) along the vertical direction. Three layers of filter screens (203) are equidistantly mounted on the surface of each rotating shaft (202) along the vertical direction. Filter holes (204) are opened on the upper surface of each layer of filter screen (203). Mounting rings (205) are fitted on the surface of the rotating shaft (202) above each layer of filter screen (203). Stirring blades (206) are equidistantly mounted on the circumferential surface of each mounting ring (205). Slag discharge ports (207) are horizontally opened on the side of the two mounting cylinders (201) that are far apart from each other, corresponding to the lower end of each layer of filter screen (203). The filter assembly (3) includes a diversion pool (301) connected to the lower ends of two mounting cylinders (201). Two mounting plates (302) are installed on the top of the diversion pool (301). A filter cloth (303) is installed on the lower inner wall of each mounting plate (302). Spring damping rods (304) are installed at the four corners of the lower surface of each mounting plate (302). A water storage tank (305) is installed at the lower end of the four spring damping rods (304). A U-shaped pressure sleeve (306) is installed on the lower surface of the mounting plate (302) located in the middle of the four spring damping rods (304). A filling mesh grid (307) is installed on the upper end of each mounting plate (302).

2. The water purification equipment for river gravity-flow water circulation according to claim 1, characterized in that: Each of the mounting cylinders (201) has two supporting beams (208) installed at its upper and lower ends, and each of the supporting beams (208) has a deep groove ball bearing (209) horizontally embedded in it; the two deep groove ball bearings (209) corresponding to each other in the vertical direction are respectively sleeved on the upper and lower ends of the rotating shaft (202).

3. The water purification equipment for river gravity-flow water circulation according to claim 1, characterized in that: Each set of stirring blades (206) and each layer of filter screen (203) are installed at a 30° angle, which can be adapted to the water flowing down from above.

4. A water purification and circulation system for river water circulation according to claim 3, characterized in that: Each layer of the filter screen (203) is a cap-shaped structure with the opening facing upwards. The diameter of the filter holes (204) on the upper surface of the three layers of filter screens (203) decreases sequentially along the vertical direction. The filter holes (204) can achieve step-by-step filtration and are tilted to adapt to water flowing down from above.

5. A water purification and circulation system for river water circulation according to claim 1, characterized in that: Each of the mounting discs (302) has a folding ring (310) mounted on its lower surface, and a mounting grid (311) is mounted in the middle of each of the folding rings (310); a through tube (312) is embedded at each of the four nodes on the upper surface of the mounting grid (311), and the through tube (312) is used to transport air upward.

6. A water purification and circulation system for river water circulation according to claim 5, characterized in that: The filling mesh grid (307) is filled with a pebble layer (313), and a sand and aquatic plant layer (314) is filled on top of the pebble layer (313); ecological filtration is achieved by relying on the pebble layer (313) and the sand and aquatic plant layer (314), and the material cost is low.

7. A water purification and circulation system for river water circulation according to claim 1, characterized in that: Each of the mounting cylinders (201) has a conical guide funnel (210) connected to its upper end, and each of the conical guide funnels (210) has a threaded acceleration groove (211) on its inner wall.

8. A water purification device for river gravity-flow water circulation according to claim 7, characterized in that: A partition plate (308) is installed in the middle of the front-to-back direction inside the diversion pool (301), and square openings (309) are opened on the four side walls of the water storage tank (305). When the water storage tank (305) is full, the spring damping rod (304) is stretched and drives the water storage tank (305) to descend, and air is drawn into the cavity. When the upper filter layer is blocked and the water inflow is reduced, the water in the water storage tank (305) is gradually discharged and the weight is reduced. The spring damping rod (304) rebounds and drives the water storage tank (305) to rise. The square opening (309) and the U-shaped pressure sleeve (306) cooperate to squeeze the internal air. The air rushes upward to fill the filling material in the mesh grid (307) to achieve the anti-blocking effect.

9. A water purification device for river gravity-flow water circulation according to claim 1, characterized in that: The mounting base (1) has drainage outlets (4) on both the left and right sides. A support frame (5) is installed on the outer side of the upper surface of the mounting base (1). Two grille doors (6) are movably connected to the left and right sides of the support frame (5) via hinges.

10. A water purification device for river gravity-flow water circulation according to claim 9, characterized in that: The front and rear sides of the support frame (5) are both mesh-like and hollow. The filtered impurities discharged from the slag discharge port (207) fall to the outer perimeter of the top of the mounting base (1). This area is separated from the water passage cavity inside the mounting base (1). The staff can open the grille door (6) to clean it regularly.

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