A water purification system suitable for seasonal fluctuations

Abstract

The present application relates to water purification technical field, disclose a kind of water purification system suitable for seasonal fluctuation, including first sedimentation tank and second sedimentation tank, second sedimentation tank is arranged below first sedimentation tank, the upper portion of first sedimentation tank is equipped with water intake, the middle part of first sedimentation tank is equipped with water outlet, the bottom of first sedimentation tank is equipped with blow-off port, water outlet is connected with second sedimentation tank by shunt piece;Shunt piece includes three-way valve, shunt pool, shunt inlet pipe and shunt outlet pipe, the first valve port of three-way valve is connected with water outlet, the second valve port of three-way valve is connected with shunt inlet pipe, the third valve port of three-way valve is connected with the water inlet of second sedimentation tank, and the water inlet of second sedimentation tank is connected with shunt outlet pipe.The present application is treated to raw water with higher turbidity by shunt piece, so that the low turbidity raw water after treatment flows into second sedimentation tank, and flows to the subsequent rear-end precision filtration and membrane separation unit of water purification system.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water purification system suitable for seasonal fluctuations. Background Technology

[0002] In the Tibetan Plateau region, the turbidity of water sources exhibits dramatic seasonal fluctuations. During the rainy season, heavy rainfall triggers surface runoff carrying large amounts of sediment, colloids, and suspended solids into the water intake, causing the raw water turbidity to surge tens or even hundreds of times in a short period. Conversely, during the dry season, some shallow groundwater or surface water experiences reduced recharge due to lower water levels. Existing large-scale water purification systems often use pretreatment units designed for plains areas, such as sedimentation tanks employing fixed-angle inclined tube packing and small-diameter gravity sludge discharge valves. In plains areas, the raw water turbidity remains stable at 50-200 ntu year-round, with strong floc settling performance, resulting in clear effluent under a fixed hydraulic load. However, in the plateau region, the raw water turbidity surges to 1000 ntu during the rainy season. + The fixed upward flow velocity of the NTHU causes flocs to be carried out by the water flow (sludge agitation), resulting in turbid water that has not been adequately pretreated directly entering the downstream precision filtration and membrane separation unit, causing irreversible fouling damage, and in severe cases, paralyzing and shutting down the entire water purification system. Summary of the Invention

[0003] To solve the above problems, the technical solution adopted by the present invention is as follows: A water purification system suitable for seasonal fluctuations includes a first sedimentation tank and a second sedimentation tank. The second sedimentation tank is located below the first sedimentation tank. The first sedimentation tank has an intake at its upper part, an outlet at its middle part, and a sewage outlet at its bottom. The outlet is connected to the second sedimentation tank via a diverter. The diversion component includes a three-way valve, a diversion tank, a diversion inlet pipe, and a diversion outlet pipe. The first valve port of the three-way valve is connected to the outlet, the second valve port of the three-way valve is connected to the diversion inlet pipe, the third valve port of the three-way valve is connected to the inlet of the second sedimentation tank, and the diversion outlet pipe is connected to the inlet of the second sedimentation tank.

[0004] Furthermore, the diversion tank includes a cylindrical section, a conical section, and a slag discharge section arranged from top to bottom. The cylindrical section, the conical section, and the slag discharge section are coaxial. The diversion inlet pipe is arranged along the tangent direction of the arc side of the cylindrical section and extends into the interior of the cylindrical section. The diversion outlet pipe is arranged at the top of the cylindrical section and extends into the interior of the cylindrical section.

[0005] Furthermore, the inner wall of the cylindrical segment is rotatably connected to a guide plate, which is an arc-shaped three-dimensional twisted curved panel. There are two guide plates, which are symmetrically arranged with the axis of the cylindrical segment as the center of symmetry. One of the guide plates is located adjacent to the diversion inlet pipe.

[0006] Furthermore, the inner walls of the cylindrical section, the conical section, the slag discharge section, and the guide plate are all provided with wear-resistant ceramic liners.

[0007] Furthermore, the guide plate is provided with a first rotating shaft, one end of which extends out of the top of a cylindrical section and is rotatably connected to the cylindrical section through a sealed bearing seat. The first rotating shaft is provided with a worm wheel at this end, and a worm is rotatably connected to the top of the cylindrical section. The worm is adapted to mesh with two worm wheels, and the two worm wheels are on the same side of the worm.

[0008] Furthermore, a second rotating shaft is rotatably connected to the top of the cylindrical segment. One end of the second rotating shaft extends into the interior of the cylindrical segment, and an eccentric wheel is provided at that end of the second rotating shaft. The eccentric wheel includes a first arc portion and a second arc portion. The first arc portion is adapted to the arc of the inner wall of the cylindrical segment, and the second arc portion is adapted to abut against the guide plate.

[0009] The beneficial effects of this invention are: The high-turbidity raw water is treated by the diversion component, and the treated low-turbidity raw water flows into the second sedimentation tank. From the second sedimentation tank, it flows to the downstream precision filtration and membrane separation unit of the water purification system. The inclined baffle plate allows the water to flow downwards at an angle. The water flows smoothly along the surface of the baffle plate, avoiding a head-on collision between the jet and the stationary wall. This retains the impact kinetic energy that would otherwise be dissipated as ordered tangential kinetic energy, making it easier to form a swirling flow. The baffle plate locally increases the rotational linear velocity without changing the dimensions of each component. Attached Figure Description

[0010] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of the invention.

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top sectional view of the cylindrical segment; Figure 3 A partial sectional view of the cylindrical segment and the first rotating shaft; Figure 4 This is a sectional view of the worm gear. Figure 5 This is a cross-sectional view of the eccentric wheel; In the picture 1. First sedimentation tank; 2. Second sedimentation tank; 3. Diversion component; 301. Three-way valve; 302. Diversion tank; 303. Diversion inlet pipe; 304. Diversion outlet pipe; 305. Slag discharge section; 306. Cylindrical section; 307. Conical section; 308. Guide plate; 309. Wear-resistant ceramic lining; 4. First rotating shaft; 5. Worm gear; 6. Worm; 7. Sealed bearing seat; 8. Second rotating shaft; 9. Eccentric wheel; 901. First arc section; 902. Second arc section; 903. Flexible layer. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0014] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0015] like Figures 1-5As shown, a water purification system suitable for seasonal fluctuations includes a first sedimentation tank 1 and a second sedimentation tank 2. Both the first sedimentation tank 1 and the second sedimentation tank 2 can adopt an inverted trapezoidal structure, including a water inlet 101 at the top, a water outlet 102 in the middle, and a sewage outlet 103 at the bottom, with a side inclination angle greater than 60°. During the non-rainy season, the raw water in the first sedimentation tank 1 and the second sedimentation tank 2 settles naturally. The side inclination angle is greater than 60°, which is greater than the angle of repose of sediment, allowing the sediment to automatically slide towards the sewage outlet 103 under the action of gravity. In addition, after the impurities accumulate, the accumulation body is "funnel-shaped," and the stress is transmitted downward along the conical surface, making it difficult to form a stable arched bridging structure. Compared with the flat bottom or shallow conical structure of traditional sedimentation tanks, which are prone to bridging and clogging under viscous mud and sand conditions, requiring vibrators or high-pressure water guns to break the arch, the system is complex to operate and maintain and has high energy consumption. The discharge outlet 103 is located at the bottom of the inverted trapezoidal structure and has a small diameter, specifically 1 / 100 of the height of the sedimentation tank. A large-diameter gate valve is installed on the discharge outlet 103. When removing sludge from the bottom of the sedimentation tank, the gate valve is opened, and the small-diameter discharge outlet 103 can form a local high-speed jet, generating a suction effect to assist in the continuous discharge of concentrated particles, while preventing backflow of clear water from diluting the bottom flow. In this invention, if the discharge outlet 103 is only located at the center or one end, sludge far from the discharge outlet 103 needs to travel a long distance horizontally to reach it. Due to the high friction at the bottom and the rapid attenuation of the flow velocity, the sludge at the far end is prone to deposition and compaction, forming a dead zone. To improve the sludge discharge efficiency of the sedimentation tank, multiple evenly arranged discharge outlets 103 can be installed along the bottom of the sedimentation tank. These outlets divide the tank bottom into several independent collection zones. Each outlet 103 is responsible for collecting sludge only from its surrounding limited area, significantly shortening the horizontal sludge transport path. Reduced transport distance means less friction loss, allowing sludge to be effectively carried away even at low flow rates, completely eliminating dead zones at the far end. Furthermore, in actual use, the sludge at the bottom of the sedimentation tank is not uniformly distributed, typically exhibiting a thicker distribution in the center and a thinner distribution around the edges. Therefore, in practical use, the multiple discharge outlets 103 can be opened and closed according to actual needs to adapt to different operating conditions (such as rainy season, dry season, and normal operation). For example, all discharge outlets 103 in areas with thick sludge can be opened, while selective opening is possible in areas with thin sludge.

[0016] During the rainy season, rainwater carrying a large amount of silt flows into the first sedimentation tank 1 through the water intake 101, causing the raw water in the first sedimentation tank 1 to churn. This results in the raw water from the first sedimentation tank 1 flowing out of the water outlet 102 having a high turbidity. The water outlet 102 is connected to the second sedimentation tank 2 through a diversion component 3. The raw water with high turbidity flows through the diversion component 3, which treats the raw water with high turbidity, so that the treated raw water with low turbidity flows into the second sedimentation tank 2, and then flows through the second sedimentation tank 2 to the subsequent back-end precision filtration and membrane separation unit of the water purification system. Specifically, the diversion component 3 includes a three-way valve 301, a diversion tank 302, a diversion inlet pipe 303, and a diversion outlet pipe 304. The first valve port of the three-way valve 301 is connected to the outlet 102, the second valve port of the three-way valve 301 is connected to the diversion inlet pipe 303, the third valve port of the three-way valve 301 is connected to the inlet of the second sedimentation tank 2, and the diversion outlet pipe 304 is connected to the inlet of the second sedimentation tank 2. When the turbidity of the raw water is high during the rainy season, the first and second valve ports of the three-way valve 301 are connected, and the high-turbidity raw water flowing out of the first sedimentation tank 1 flows into the diversion tank 302. The diversion tank 302 can separate large particulate impurities such as silt and suspended solids in the high-turbidity raw water, allowing the separated low-turbidity raw water to flow into the second sedimentation tank 2 through the diversion outlet pipe 304. During normal seasons, the turbidity of the raw water in the first sedimentation tank 1 is low. In order to improve the overall working efficiency of the water purification system, the first and third valve ports of the three-way valve 301 are connected, and the raw water flowing out of the first sedimentation tank 1 can flow directly into the second sedimentation tank 2. In this invention, the three-way valve 301 uses a Y-type three-way valve. Due to the significant seasonal fluctuations in raw water turbidity in high-altitude areas, the three-way valve 301 needs to be used long-term in high-turbidity raw water environments. The flow channel of a typical T-type three-way valve has a 90° right-angle turn, causing particles in the high-turbidity raw water to directly impact the valve body and valve seat sealing surfaces under inertia, leading to severe erosion wear and jamming, resulting in a short service life and unsuitability for high-altitude areas. The Y-type three-way valve, however, designs the angle between the branch flow channel and the main flow channel to be 120°~135°, i.e., the angle between the first and second valve ports and the angle between the first and third valve ports of the three-way valve 301 are 120°~135°. This makes the change in raw water flow direction gradual, avoiding the severe turbulence and eddies caused by a sharp 90° turn. Particles and impurities in the raw water slide along the tangential direction of the valve body's inner wall, rather than impacting the sealing surface perpendicularly. According to the erosion wear formula... In the formula, E is the wear rate, and K is the comprehensive wear coefficient. For particle mass flow rate, Let n be the particle impact velocity, and n be the velocity exponent. The angle function describes the relationship between wear rate and impact angle α. Particle size, For the surface hardness of the target material, To achieve the material's yield strength, a small-angle cut can significantly reduce the cutting energy of particles on the metal surface, extending valve life. Furthermore, the Y-shaped flow channel has no dead corners or grooves inside. In the switching state, the high-speed fluid constantly scours the entire flow channel surface, using the fluid's own kinetic energy to carry away particles and prevent particles from accumulating and jamming in the valve cavity. In contrast, the blind end of the T-type valve is prone to sand accumulation, causing the valve core to malfunction.

[0017] Specifically, the diversion tank 302 includes a cylindrical section 306, a conical section 307, and a slag discharge section 305 arranged from top to bottom. The cylindrical section 306, the conical section 307, and the slag discharge section 305 are coaxial. The diversion inlet pipe 303 is arranged along the tangent direction of the arc side of the cylindrical section 306 and extends into the interior of the cylindrical section 306. The diversion outlet pipe 304 is arranged at the top of the cylindrical section 306 and extends into the interior of the cylindrical section 306. The process for separating large particulate impurities in the diversion tank 302 of this invention is as follows: High-turbidity raw water flows into the cylindrical section 306 along the tangential direction through the diversion inlet pipe 303. When the raw water enters the cylindrical section 306, it will swirl downwards and generate forced swirling flow, flowing into the conical section 307. According to the law of conservation of angular momentum, as the water flows downwards, if the radius remains unchanged, the tangential velocity will decrease due to friction. However, the inverted conical section 307 gradually reduces the radius of rotation, forcing the tangential velocity to increase with depth, thereby compensating for the energy loss caused by viscous friction, maintaining uniform centrifugal intensity throughout the cavity, and avoiding the dead zone phenomenon of strong swirling flow at the top and weak swirling flow at the bottom. The conical shape causes the cross-sectional area to gradually narrow from top to bottom. Under the premise of constant flow rate, the axial velocity increases with depth; that is, the larger cross-section at the top has a lower velocity, while the smaller cross-section at the bottom has a higher velocity. According to the law of conservation of mass, the amount of water entering the conical section 307 is equal to the amount of water discharged from the slag discharge section 305 plus the amount of water discharged from the diversion outlet pipe 304 in the cylindrical section 306. Since the slag discharge section 305 is located at the bottom of the conical section 307 and has the smallest cross-section, its discharge volume is the smallest. Therefore, when the raw water flows to the slag discharge section 305, it must turn around and move upwards at the bottom of the conical section 307. According to the continuity equation Q=A×v, when this huge upward backflow passes through the increasingly narrow lower part of the cone, the flow area A decreases sharply, forcing the upward velocity v to decrease. As the turbidity increases dramatically, particulate impurities in the raw water adhere tightly to the inner wall of the conical section 307 under the influence of gravity and centrifugal force, and are subjected to downward gravity. When water molecules in the upward-flowing raw water sweep across the particle surface at an upward velocity, the water molecules adhering to the particle surface are stuck, forming a velocity gradient with the outer high-speed water flow. This velocity gradient generates shear stress, which macroscopically manifests as an upward frictional force acting on the particle surface. At the same time, the particle's water-facing side experiences upward dynamic pressure, and a low-pressure vortex zone is formed on the water-repellent side. The pressure difference between the two also forms a resistance difference. When the downward gravity of the particulate impurities is greater than the sum of the upward frictional force and the resistance difference, the particulate impurities will continue to slide down along the side wall of the conical section 307. Meanwhile, other fine impurities in the raw water, because their downward gravity is less than the sum of the upward frictional force and the resistance difference, will move upward with the water flow and flow out from the diversion outlet pipe 304 of the cylindrical section 306, thus achieving the diversion of large particulate impurities in the high-turbidity raw water.

[0018] In this invention, raw water flows from the diversion inlet pipe 303 to the diversion tank 302. The diversion tank 302 requires the raw water to have a certain initial inlet velocity in order to achieve its diversion effect. If the initial inlet velocity of the raw water is small, the raw water cannot form a vortex on the cylindrical section 306 and the conical section 307, causing the raw water to flow directly out from the slag discharge section 305 and failing to achieve the upward movement of the water flow. Therefore, the second sedimentation tank 2 can be set below the first sedimentation tank 1. When the raw water in the first sedimentation tank 1 flows out from the outlet 102, under the action of gravity, the gravitational potential energy is converted into the dynamic potential energy of the raw water to meet the initial inlet velocity of the raw water. Using the above method, the initial influent velocity of the raw water depends entirely on the height difference between the first sedimentation tank 1 and the second sedimentation tank 2, and the initial influent velocity cannot be effectively controlled. If the initial influent velocity of the raw water is too high, it will lead to an excessive upward flow velocity, resulting in excessive upward friction on the particulate impurities in the raw water, and thus poor impurity diversion effect. Therefore, a booster pump and a pressure reducing valve can be installed sequentially between the outlet 102 and the diversion influent pipe 303. When the initial influent velocity of the raw water is too low, the booster pump can be started and the pressure reducing valve can be closed to increase the initial influent velocity. Conversely, the booster pump can be closed and the pressure reducing valve can be opened to reduce the initial influent velocity.

[0019] In this invention, when raw water enters the cylindrical section 306 through the diversion inlet pipe 303, it carries a large radial component (pointing directly to the center) and an axial component. The high-speed water flow directly impacts the inner wall of the cylindrical section 306, resulting in severe impact loss and turbulent dissipation. A large amount of kinetic energy is converted into heat energy rather than rotational kinetic energy, affecting the formation of vortex. Therefore, in order to allow the raw water to form vortex more quickly in the diversion pool 302, a guide plate 308 is rotatably connected to the inner wall of the cylindrical section 306. The guide plate 308 is an arc-shaped three-dimensional twisted curved panel. There are two guide plates 308, which are symmetrically arranged about the axis of the cylindrical section 306. One of the guide plates 308 is located adjacent to the diversion inlet pipe 303. The guide plate 308 is inclined, with an inclination angle of 10°-25°. The arc-shaped curved surface of the guide plate 308 forces the water flow to adhere to the wall. According to the principle of streamline constraint, the water flow must flow out along the tangential direction of the plate surface, and the guide plate 308 is slightly curved downwards, allowing the water flow to flow downwards at an angle. The water flow smoothly transitions along the surface of the guide plate 308, avoiding a head-on collision between the jet and the stationary wall. This preserves the impact kinetic energy that would otherwise be dissipated as ordered tangential kinetic energy, making it easier to form a swirling flow. In addition, the guide plate 308 itself occupies a certain amount of the cavity space of the cylindrical section 306, and its inner edge extends towards the center of the circle. This makes the radius of the actual circular trajectory of the water flow smaller than the radius of the cylindrical section 306. For a given inflow moment, the smaller the initial radius of rotation, the greater the initial tangential velocity obtained. The guide plate 308 locally increases the rotational linear velocity without changing the dimensions of other components.

[0020] Under conditions of high raw water turbidity, the angle of the guide plate 308 is set to a large angle of 20°-25°, which makes the initial rotation radius smaller and the initial inflow velocity of the raw water greater. The centrifugal force generated by the vortex is greater, and particulate impurities in the raw water can be quickly thrown out, improving the diversion effect. Under conditions of low raw water turbidity, in addition to being directly transported to the second sedimentation tank 2 through the three-way valve 301, the low-turbidity raw water can also flow into the diversion tank 302. At this time, the tilt angle of the guide plate 308 is set to a small angle of 10°-20°. The rotation intensity of the vortex is weakened, the axial flow velocity is reduced, which can prolong the settling time of small flocs, and the upward force on the impurities is smaller, which can further allow finer impurities to fall out from the slag discharge section 305.

[0021] In this invention, the inner walls of the cylindrical section 306, the conical section 307, the slag discharge section 305, and the guide plate 308 are all subjected to the impact of water flow. In order to improve their service life, wear-resistant ceramic liners 309 are provided on the inner walls of the cylindrical section 306, the conical section 307, the slag discharge section 305, and the guide plate 308. The guide plate 308 will be subjected to high-speed impact of water flow and cutting wear from particulate impurities. Therefore, the wear-resistant ceramic liner 309 on the guide plate 308 can be made of sintered silicon carbide. The high hardness of silicon carbide (HV≥2500) can effectively resist cutting wear. It is fixed to the guide plate 308 by dovetail groove inlay and epoxy bonding. The wear-resistant ceramic liner 309 on the cylindrical section 306 primarily withstands high shear friction and can be made of alumina-toughened ceramic. The wear-resistant ceramic liner 309 on the conical section 307 and the slag discharge section 305 primarily withstands particle impact and extrusion pressure and can be made of tungsten carbide cermet. The wear-resistant ceramic liner 309 can be prefabricated into standard arc-shaped modules (4-6 modules per ring) according to corresponding geometric shapes, with a single module weighing ≤15kg, facilitating manual handling and installation at high altitudes, and fixed by adhesive bonding. Furthermore, the smooth surface of the wear-resistant ceramic liner 309 not only improves the service life of related components but also reduces water flow friction and boundary disturbances, avoiding flow field turbulence and energy loss caused by wear and roughness. In this invention, the wear-resistant ceramic liner 309 on the guide plate 308 bears the most severe impact wear, protecting the wear-resistant ceramic liners 309 on the other components of the diversion tank 302. Therefore, when the wear-resistant ceramic liner 309 on the guide plate 308 wears to its limit, only the guide plate 308 needs to be replaced, without replacing the wear-resistant ceramic liners 309 on the other components of the diversion tank 302, effectively reducing the cost of use.

[0022] To facilitate the adjustment of the angle of the guide plate 308, the guide plate 308 is provided with a first rotating shaft 4. One end of the first rotating shaft 4 extends to the top of a cylindrical section 306 and is rotatably connected to the cylindrical section 306 through a sealed bearing seat 7. A worm wheel 5 is provided at this end of the first rotating shaft 4. A worm 6 is rotatably connected to the top of the cylindrical section 306. The worm 6 is adapted to mesh with two worm wheels 5, and the two worm wheels 5 are on the same side of the worm 6. When adjusting the guide plate 308, rotating the worm 6 drives the worm wheels 5 to rotate, thereby adjusting the angle of the guide plate 308. By having one worm 6 drive two worm wheels 5 to rotate synchronously, the two guide plates 308 rotate at the same angle, ensuring that the two guide plates 308 are always in a centrally symmetrical state. Furthermore, after the angle of the guide plate 308 is adjusted, the self-locking characteristic of the worm wheels 5 and the worm 6 prevents the worm wheels 5 from driving the worm 6 to rotate, thus achieving self-locking fixation of the guide plate 308. In this invention, the worm gear 6 can be rotated manually or by installing a servo motor to control its rotation.

[0023] Because the guide plate 308 will be subjected to a large water flow impact, when the guide plate 308 has an inclination angle, it will form a lever with the first rotating shaft 4. The water flow impact will exert pressure on the guide plate 308 and, under the lever principle, will generate a large torque on the worm gear 5 and worm 6, which can easily cause damage to the worm gear 5 and worm 6. Therefore, a second rotating shaft 8 is rotatably connected to the top of the cylindrical section 306. One end of the second rotating shaft 8 extends into the interior of the cylindrical section 306, and an eccentric wheel 9 is provided at this end of the second rotating shaft 8. The eccentric wheel 9 includes a first arc portion 901 and a second arc portion 902. The first arc portion 901 is adapted to the arc of the inner wall of the cylindrical section 306, and the second arc portion 902 is adapted to abut against the guide plate 308. When adjusting the angle of the guide plate 308, the eccentric wheel 9 rotates accordingly, ensuring that the second arc portion 902 of the eccentric wheel 9 always abuts against the back of the guide plate 308, and the first arc portion 901 always abuts against the inner wall of the cylindrical section 306. The eccentric wheel 9 provides support for the guide plate 308, preventing the worm gear 5 and worm 6 from being subjected to excessive torque. The rotation of the eccentric wheel 9 can be achieved by a servo motor. The output shaft of the servo motor can be connected to the second rotating shaft 8 through gear meshing. The servo motor drives the rotation of the second rotating shaft 8. After the eccentric wheel 9 has rotated, the servo motor is locked to fix the eccentric wheel 9, preventing the eccentric wheel 9 from deflecting due to the impact of water flow and thus failing to provide support for the guide plate 308. In this invention, since the guide plate 308 needs to withstand a large water flow impact force, if only one eccentric wheel 9 is set for support, the guide plate 308 will experience uneven force, causing the guide plate 308 to deform under the water flow impact force, changing the curvature of the guide plate 308, and affecting the formation of the vortex in the cylindrical section 306, thus affecting the flow diversion effect. Therefore, multiple eccentric wheels 9 are evenly arranged from top to bottom on the second rotating shaft 8. The specific number is determined according to the height of the guide plate 308. The deflection angles of the multiple eccentric wheels 9 from top to bottom are different, and the curvature of the line connecting their contact points with the guide plate 308 is adapted to the curvature of the guide plate 308 itself. However, when the guide plate 308 rotates, its angle changes, causing the curvature of its back surface to no longer match the curvature of the line connecting the contact points between the multiple eccentric wheels 9 and the guide plate 308. Therefore, when the second rotating shaft 8 drives the multiple eccentric wheels 9 to rotate and adapt to the guide plate 308, the second arc portion 902 of some eccentric wheels 9 may not fully conform to the arc-shaped back surface of the guide plate 308. Therefore, a flexible layer 903 is provided in the second arc portion 902 of the eccentric wheels 9. The flexible layer 903 can be made of flexible materials such as rubber. The flexible layer 903 has extensibility. After the guide plate 308 adjusts its angle, it squeezes the multiple eccentric wheels 9, allowing them to fully conform to the back surface of the guide plate 308. Furthermore, the flexible layer 903 provides shock absorption for the guide plate 308, preventing rigid collisions and friction between the guide plate 308 and the eccentric wheels 9 due to water flow impact, thus improving the service life of the guide plate 308.

[0024] Unless otherwise defined, the same reference numerals in the embodiments and drawings of this disclosure have the same meaning.

[0025] The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments of this disclosure; other structures can be referred to in a general design.

[0026] For clarity, components or areas are enlarged in the accompanying drawings used to describe embodiments of this disclosure. It will be understood that when an element is referred to as being "above" or "below" another element, the element may be "directly" located "above" or "below" the other element, or there may be intermediate elements present.

[0027] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A water purification system suitable for seasonal fluctuations, characterized in that: It includes a first sedimentation tank (1) and a second sedimentation tank (2). The second sedimentation tank (2) is located below the first sedimentation tank (1). The first sedimentation tank (1) has an intake (101) at its upper part, an outlet (102) at its middle part, and a sewage outlet (103) at its bottom. The outlet (102) is connected to the second sedimentation tank (2) through a diverter (3). The diversion component (3) includes a three-way valve (301), a diversion tank (302), a diversion inlet pipe (303), and a diversion outlet pipe (304). The first valve port of the three-way valve (301) is connected to the outlet (102), the second valve port of the three-way valve (301) is connected to the diversion inlet pipe (303), the third valve port of the three-way valve (301) is connected to the inlet of the second sedimentation tank (2), and the diversion outlet pipe (304) is connected to the inlet of the second sedimentation tank (2).

2. A water purification system suitable for seasonal fluctuations according to claim 1, characterized in that: The diversion tank (302) includes a cylindrical section (306), a conical section (307), and a slag discharge section (305) arranged from top to bottom. The cylindrical section (306), the conical section (307), and the slag discharge section (308) are coaxial. The diversion inlet pipe (303) is arranged along the tangent direction of the arc side of the cylindrical section (306) and extends into the interior of the cylindrical section (306). The diversion outlet pipe (304) is arranged at the top of the cylindrical section (306) and extends into the interior of the cylindrical section (306).

3. A water purification system suitable for seasonal fluctuations according to claim 2, characterized in that: The inner wall of the cylindrical segment (306) is rotatably connected to a guide plate (308). The guide plate (308) is an arc-shaped three-dimensional twisted panel. There are two guide plates (308). The two guide plates (308) are symmetrically arranged with the axis of the cylindrical segment (306) as the center of symmetry. One of the guide plates (308) is located adjacent to the diversion inlet pipe (303).

4. A water purification system suitable for seasonal fluctuations according to claim 3, characterized in that: The inner walls of the cylindrical section (306), the conical section (307), the slag discharge section (305), and the guide plate (308) are all provided with wear-resistant ceramic liners (309).

5. A water purification system suitable for seasonal fluctuations according to claim 3, characterized in that: The guide plate (308) is provided with a first rotating shaft (4), one end of which extends out of the top of the cylindrical section (306) and is rotatably connected to the cylindrical section (306) through a sealed bearing seat (7). The first rotating shaft (4) is provided with a worm wheel (5) at this end. The top of the cylindrical section (306) is rotatably connected to a worm (6). The worm (6) is adapted to mesh with two worm wheels (5), and the two worm wheels (5) are on the same side of the worm (6).

6. A water purification system suitable for seasonal fluctuations according to claim 3, characterized in that: The top end of the cylindrical segment (306) is rotatably connected to a second rotating shaft (8). One end of the second rotating shaft (8) extends into the interior of the cylindrical segment (306), and the end of the second rotating shaft (8) is provided with an eccentric wheel (9). The eccentric wheel (9) includes a first arc portion (901) and a second arc portion (902). The first arc portion (901) is adapted to the arc of the inner wall of the cylindrical segment (306), and the second arc portion (902) is adapted to abut against the guide plate (308).

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