Efficient filtering type sewage treatment device

Abstract

The invention relates to the technical field of multi-stage sewage treatment, in particular to an efficient filtering type sewage treatment device which comprises a filter tank, filter cartridges are arranged in the filter tank, and the filter cartridges comprise a first filter cartridge, a second filter cartridge and a third filter cartridge which are sleeved outwards stage by stage and are arranged at intervals. A plurality of riding wheels for supporting rotation are mounted at the bottom of the third filter cartridge, a rotating shaft penetrates through the third filter cartridge in a transmission manner, and a power mechanism is mounted at one end of the third filter cartridge; the device realizes step-by-step purification from coarse to fine through multi-stage filtration, so that the effluent quality is remarkably improved; the power switching mechanism realizes forward and reverse rotation of the motor to automatically switch a filtering mode and a cleaning mode, strengthens the filtering effect during forward rotation, and starts the cleaning function and generates shearing force to damage impurity attachment during reverse rotation; the cleaning mechanism adopts a spiral motion track to form a three-dimensional cleaning path, and stubborn pollutants are removed; a self-cleaning structure is arranged to keep the efficient working state of the cleaning assembly; impurities are guided out on line through a hollow cavity structure of the rotating shaft, and shutdown disassembly is not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-stage sewage treatment, in particular to a high-efficiency filtration type sewage treatment device. BACKGROUND

[0002] Sewage filtration treatment is an important measure to protect the environment and public health, plays a key role in removing pollutants such as suspended particles, organic matter, harmful microorganisms and heavy metal ions in sewage, can effectively prevent water eutrophication, reduce water pollution, protect the balance of the ecological system, and at the same time provide clean water sources for industrial water recycling and urban water systems, and realize the sustainable recycling of water resources; the multi-stage filtration system realizes the graded interception of pollutants by setting different precision filtration units, the first stage of coarse filtration removes large particle suspended solids and floating impurities, reduces the subsequent filtration load, the second stage of medium filtration treats medium particle size particles and flocculent matter, and the third stage of fine filtration removes fine particles and colloidal matter, ensuring that the final effluent meets the discharge standard or reuse requirements; the necessity of multi-stage filtration lies in that single filtration cannot simultaneously consider treatment efficiency and effluent quality, while graded treatment can adopt corresponding filtration precision according to the characteristics of different pollutants, prolong the service life of each stage of filter screen, reduce operation cost, improve overall filtration efficiency, and at the same time reduce the risk of clogging of high-precision filter screen through step-by-step purification, ensuring stable operation of the equipment and continuous standardization of effluent quality, providing reliable technical support for environmental protection and comprehensive utilization of water resources.

[0003] A kind of urban sewage filtration purification equipment is disclosed in Chinese patent document (publication number: CN119371056B), comprising equipment seat, left support, right support, collection tank, left connecting frame and right connecting frame, further comprising: filtration purification assembly, drain pipe, water inlet pipe, rotation control mechanism and rotating mechanism, filtration purification assembly includes first filter cylinder, second filter cylinder, first purification cylinder and second purification cylinder.A kind of urban sewage filtration purification equipment in the present application, rotation control mechanism cooperates with rotating mechanism, not only can drive first filter cylinder, second filter cylinder, first purification cylinder and second purification cylinder synchronous and same direction rotation, but also can drive first filter cylinder and first purification cylinder counterclockwise rotation, and drive second filter cylinder and second purification cylinder clockwise rotation, which not only can complete filtration and purification of sewage, but also can help reduce the deposits attached to the surface of filtration purification assembly, optimize the distribution of water flow between cylinder bodies, and facilitate the sedimentation and separation of particulate matter.

[0004] Traditional filtration equipment has low filtration efficiency when treating complex sewage, and cannot realize effective graded treatment of different particle size impurities, resulting in unstable effluent quality that is difficult to meet the standard;

[0005] During the filtration process, the filter screen is easily clogged by impurities, affecting the filtration throughput and separation effect. Existing cleaning methods mostly involve stopping the machine to disassemble and clean, which not only interrupts the continuity of production but also increases labor costs and maintenance difficulty.

[0006] Meanwhile, cleaning agencies themselves accumulate impurities during the work process, affecting the sustainability of the cleaning effect. In addition, most equipment requires an independent cleaning power system, which increases the complexity of the equipment, the space occupied, and the manufacturing cost. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a high-efficiency filtration-type wastewater treatment device. It employs a pre-sedimentation tank and a multi-stage filter cartridge design, achieving progressive separation from coarse to fine filters through the first, second, and third filter cartridges. A power switching mechanism is incorporated: when the motor rotates forward, all filter cartridges rotate in the same direction to enhance filtration; when the motor rotates in reverse, the second and third filter cartridges rotate in opposite directions, generating shear force and automatically activating the cleaning components. The cleaning mechanism utilizes a helical motion trajectory, combining axial movement and rotation around the axis to form a three-dimensional cleaning path, thoroughly removing stubborn deposits through cross-shear cleaning effects. A self-cleaning structure is incorporated, utilizing a reciprocating rod, ratchet and tooth mechanism, and arc-shaped groove guidance to achieve self-cleaning of the cleaning components. Impurities are exported online via a hollow shaft structure and a rotating joint in conjunction with an external pump, eliminating the need for system shutdown and disassembly. The entire system relies solely on the forward and reverse switching of a single motor to automatically switch between filtration and cleaning functions, simplifying power configuration and improving the equipment's continuous operation capability and automation level.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A high-efficiency filtration-type wastewater treatment device includes a pre-filter and a filter box. The filter box contains filter cartridges, which include a first filter cartridge, a second filter cartridge, and a third filter cartridge arranged sequentially outwards and maintaining a certain distance from each other. The bottom of the third filter cartridge is equipped with multiple rollers for rotation support. A rotating shaft passes through the interior of the third filter cartridge. A power mechanism is installed at one end of the third filter cartridge, and the power mechanism is driven by the rotating shaft. A power switching mechanism is located at the other end of the third filter cartridge. The rotating shaft, driven by the power switching mechanism, extends through the filter box to the outside. A cleaning mechanism is installed between the second and third filter cartridges. This cleaning mechanism cleans the filter cartridge walls while simultaneously collecting impurities.

[0010] Preferably, the power switching mechanism includes a planetary carrier and a cylindrical gearbox. The gearbox is sealed to the first and second end caps at the bottom. One end of the third filter cartridge is fixedly mounted on the outer periphery of the gearbox, and the other end of the third filter cartridge is rotatably mounted on a rotating shaft. A partition fixed in the middle of the gearbox divides the gearbox into region one and region two. Region one is adjacent to the end of the filter box. A first drive gear is fixed on the rotating shaft inside region one, and an internal gear ring is fixed on the inner wall of the gearbox inside region one. Multiple planetary gears mesh between the internal gear ring and the first drive gear, and the multiple planetary gears are rotatably mounted on the planetary carrier. A sleeve is rotatably fitted on the rotating shaft. The sleeve is fixed to the end of the filter box, and one end of the sleeve rotatably passes through the first end cap into region one. The end of the sleeve near the planetary carrier has an integrally formed reduced diameter section, which is mounted inside the planetary carrier through a second one-way bearing. The rotating shaft is connected to the partition through a first one-way bearing, and the rotating shaft is connected to the second end cap through a rotary bearing. The first one-way bearing and the second one-way bearing limit the direction of rotation to opposite directions.

[0011] Preferably, a second driving gear is fixedly installed on the rotating shaft located in the second region. The second driving gear meshes with a driven gear. The drive shaft on the driven gear passes through the second end cover and extends to the area between the second and third filter cartridges. The drive shaft is connected to a bidirectional threaded screw via a coupling. The bidirectional threaded screw is installed with the cover of the third filter cartridge and the second end cover via rotating bearings. A first guide rod and a corrugated rod are fixedly installed parallel to the bidirectional threaded screw at intervals. The cleaning mechanism includes a box body. Brushes are fixedly installed on the ends of the box body near the two filter cartridges. The box body is sleeved on the bidirectional threaded screw. The box body and the bidirectional threaded screw move with a nut. The first guide rod and the corrugated rod slide through the box body. A collection port and a discharge port are opened opposite each other on the side of the box body. The collection port and the discharge port are connected to each other through a U-shaped channel. A filter screen is provided at the discharge port. A cleaning component is provided in the U-shaped channel near the filter screen.

[0012] Preferably, the cleaning assembly includes a reciprocating unit and a cleaning unit. The reciprocating unit includes a reciprocating rod, a lifting plate, and a first guide block fixed to the inner wall of the box. The reciprocating rod slides through the top plate of the box and passes through the first guide block. A first return spring is sleeved on the reciprocating rod located between the top plate of the box and the first guide block. A support plate is fixed on the reciprocating rod, with the top of the support plate supporting the bottom end of the first return spring and the bottom of the support plate detachably abutting against the top of the first guide block. A roller is fixed on the end of the reciprocating rod away from the top plate of the box. Several arc-shaped grooves are evenly spaced along the axial direction on the corrugated rod, and there is an arc-shaped protrusion between adjacent arc-shaped grooves. The roller abuts against the corrugated rod. When the box moves relative to the corrugated rod, the roller of the reciprocating rod moves between the arc-shaped grooves and the arc-shaped protrusions, generating up-and-down reciprocating movement. A lifting plate is fixed on the reciprocating rod located between the first guide block and the roller. The lifting plate lifts the cleaning unit as the reciprocating rod moves upward.

[0013] Preferably, the cleaning unit includes a ratchet and a lifting plate. The ratchet is located between the reciprocating rod and the discharge port, and it movably passes through the top plate of the box. A second guide block is fixed at the bottom of the U-shaped channel, and the ratchet movably passes through the second guide block. The ratchet has ratchet teeth, and a reset component is provided at the end of the ratchet. The lifting plate is fixedly installed on the ratchet near the discharge port. A third reset spring is sleeved on the ratchet located between the lifting plate and the top plate of the box. A brush plate is fixed on the lifting plate, and a second guide rod is fixed parallel to the ratchet. The ends of the second guide rod are respectively fixed to the upper and lower inner walls of the box, and the second guide rod slides through both the lifting plate and the lifting plate. The middle part of the ratchet passes through the lifting plate, and a first ratchet lock is provided in the lifting plate. The structure includes a first ratchet locking structure comprising an inclined groove on the side of the lifting plate near the ratchet, inside which a second return spring and a locking rod are slidably installed. A flat-bottomed notch is formed on the upper edge of the locking rod away from the spring end, and the flat-bottomed notch of the locking rod cooperates with the flat-topped notch of the ratchet to restrict the downward movement of the ratchet. The end face of the locking rod cooperates with the lower inclined surface of the ratchet to facilitate the upward movement of the ratchet. A limiting block is fixed to the top plate of the housing, and the ratchet passes through the limiting block. A second ratchet locking structure is set inside the limiting block. When the lifting plate moves upward, the first ratchet locking structure lifts the ratchet upward, and the second ratchet locking structure locks the risen ratchet, preventing it from sliding down during the downward movement of the first ratchet locking structure.

[0014] Preferably, the reset component includes a first ring and a second ring, both sleeved on the ratchet. The first ring is rotatably mounted on the top of the limiting block. A key is integrally formed on the inner wall of the first ring, and a corresponding groove is provided on the ratchet corresponding to the key. A first circumferential tension spring connects the limiting block and the first ring. The second ring is rotatably mounted on the top of the second guide block. A second circumferential tension spring is provided between the second ring and the second guide block. A retraction groove is formed on the inner wall of the second ring, and a fourth reset spring and a traction rod are slidably sleeved inside the retraction groove. A reset groove is formed at the bottom of the ratchet, and the traction rod is slidably sleeved on the reset spring. Inside the groove, the reset groove includes interconnected straight grooves, arc-shaped grooves, and radial grooves. The straight groove is located at the bottom of the ratchet and is opened along the axial direction. The bottom of the straight groove is opened along the circumference, and the other end of the radial groove is connected to the top of the straight groove through the arc-shaped groove. The bottom groove depth of the arc-shaped groove is lower than the end of the adjacent radial groove to form a first low-level groove, and the top groove depth of the straight groove is lower than the end of the adjacent arc-shaped groove to form a second low-level groove. The second circumferential tension spring has an opposite force to the first circumferential tension spring, and the force of the second circumferential tension spring is greater than that of the first circumferential tension spring. The final force of the two circumferential tension springs causes the ratchet locking structure to lock in place.

[0015] Preferably, the pre-filter is provided with an inlet, and the filter box is provided with an outlet on one side; the rotating shaft is integrally formed with two independent hollow cavities, and each end of the rotating shaft is integrally formed with an opening, and the openings at both ends are connected to the adjacent hollow cavities respectively. One end of the rotating shaft is connected to the inside of the pre-filter, and a flow port is opened on the hollow cavity connected to the pre-filter to guide the liquid to be treated in the pre-filter into the filter box; the other end of the rotating shaft extends to the outside and is equipped with a rotating joint, and the other end of the rotating joint is connected to the outlet pump, and a suction port is opened on the hollow cavity communicating with the outside.

[0016] Preferably, a first filter cylinder is fixedly sleeved on the outer circumference of the rotating shaft at intervals, and a second filter cylinder is fixedly sleeved on the outer circumference of the first filter cylinder at intervals. The two ends of the first and second filter cylinders are fixedly connected to the rotating shaft through a third end cap. Multiple collection ports are provided on the first filter cylinder, and an arc-shaped cover plate is installed on the collection port through the rotating shaft. A torsion spring is installed on the rotating shaft to ensure that the arc-shaped cover plate is sealed and fitted with the first filter cylinder during the filtration process. A guide plate is fixed on the outer surface of the arc-shaped cover plate on the side away from the rotating shaft. The guide plate and the circumferential area of ​​the first filter cylinder have an opening inclination angle. When the guide plate rotates in the same direction as the liquid flow, the arc-shaped cover plate is sealed and fitted with the first filter cylinder. When the guide plate rotates in the opposite direction to the liquid flow, the arc-shaped cover plate is opened to collect impurities in the liquid.

[0017] Preferably, the collection port is provided with a rotating door, and a second rotating shaft is inserted through the side of the rotating door away from the top plate of the box. The two ends of the second rotating shaft are rotatably mounted on the two side walls of the box. A second torsion spring is sleeved on both ends of the second rotating shaft, and the second torsion spring connects the rotating door and the side walls of the box. When the rotating shaft keeps rotating in the forward direction during the filtration process, the second torsion spring keeps the rotating door and the collection port closed. When the rotating shaft keeps rotating in the reverse direction during the cleaning process, the rotating door rotates inward to open and collect impurities in the liquid.

[0018] Preferably, the power mechanism includes a motor with forward and reverse rotation functions and a first sprocket. The motor is fixedly installed on the top of the filter box, the first sprocket is fixedly installed on the rotating shaft, and a driven shaft is rotatably arranged on the inner wall of the box. A pulley and a second sprocket are fixedly mounted on the driven shaft in sequence. The output end of the motor is connected to the pulley through belt drive, and the second sprocket is connected to the first sprocket through chain drive.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention utilizes the pre-sedimentation treatment in the pre-filter tank and the synergistic effect of multi-stage filter cartridges. A hollow shaft design allows the first filter cartridge to be introduced from the center, preventing disturbance from sediment and floating matter. The multi-stage filtration system achieves progressive purification from coarse to fine through the step-by-step filtration of the first, second, and third filter cartridges. Each filter cartridge handles the removal of impurities within a different particle size range, ensuring the final product is a high-quality purified liquid. When the motor rotates forward, all filter cartridges rotate in the same direction, facilitating filtration and sedimentation. When the motor rotates in reverse, the second and third filter cartridges rotate in opposite directions, creating shearing action. Simultaneously, the cleaning component is automatically activated, and the arc-shaped cover of the first filter cartridge opens to collect internal impurities, significantly improving overall filtration efficiency and effluent water quality.

[0021] 2. The power switching mechanism of the present invention can not only keep the cleaning mechanism stationary during the filtration process when the motor is rotating forward, which is conducive to sedimentation and filtration inside the filter cartridge, but also automatically start the cleaning mechanism and open the arc-shaped cover of the first filter cartridge when the motor is rotating in reverse, so as to clean and collect the impurities inside simultaneously. By switching the forward and reverse directions of the motor, the cleaning structure can be automatically started without the need for additional power, simplifying the structure and saving space and cost.

[0022] Specifically, during the forward rotation of the motor, the first one-way bearing of the power switching mechanism restricts the rotation of the gearbox, causing the shaft to drive the gearbox and internal gear ring to rotate together. The second one-way bearing on the planetary carrier rotates freely, allowing the planetary carrier to rotate with the shaft without triggering the cleaning mechanism or opening the arc-shaped cover. Ultimately, the shaft and the third filter cartridge rotate in the same direction, and all filter cartridges rotate in the same direction. The resulting centrifugal force enhances the solid-liquid separation effect, and the spiral flow increases the contact time and area between the liquid and the filter screen. During the reverse rotation of the motor, the second one-way bearing restricts the planetary carrier to remain stationary, allowing the planetary gears to rotate freely. At this time, the first one-way bearing rotates freely, and the gearbox does not rotate synchronously with the shaft. Meanwhile, the planetary gears simultaneously mesh with the internal gear ring and the first driving gear, causing the shaft and the third filter cartridge to rotate in opposite directions. Since the shaft and the partition of the gearbox rotate in opposite directions at this time, the second driving gear and the driven gear mesh and rotate. The driven gear rotates, driving the bidirectional threaded screw to rotate. The bidirectional threaded screw and the nut move together to provide power for the reciprocating linear movement of the cleaning component.

[0023] 3. During the cleaning process of the filter screen, the cleaning mechanism of the present invention not only moves along the filter cylinder axis, but also rotates around the rotating shaft as a whole. The brushes at both ends of the box body clean the attached impurities on the rotating filter cylinder and form a spiral cleaning path. The spiral motion combined with the opposite rotation of the filter cylinder forms a cross-shear cleaning effect. The dynamic shearing force generated by the relative motion can destroy the adhesion bond between the impurities and the filter screen, so that stubborn dirt can be completely removed before collection.

[0024] Specifically, when the motor rotates in reverse, the second and third filter cartridges rotate in opposite directions, generating strong shearing force that disrupts the adhesion of impurities. This facilitates the effective collection of impurities in the area between the second and third filter cartridges by the housing. Simultaneously, the arc-shaped cover opens to collect impurities inside the second filter cartridge and transfer them to the first filter cartridge. Through the suction port on the rotating shaft and the hollow cavity structure working in conjunction with the rotating joint, the impurities accumulated inside the first filter cartridge are discharged through an external pump, achieving online cleaning without disassembly. This significantly improves the continuous operation capability and filtration efficiency of the equipment.

[0025] 4. The cleaning mechanism of the present invention can not only collect impurities inside the area, but also convert the rotation of the second drive gear into the power of movement, and further drive the self-cleaning structure inside the box to complete self-cleaning and maintain a high-efficiency working state.

[0026] Specifically, during the movement of the housing, the rollers at the bottom of the reciprocating rod travel on the corrugated rod. As the rollers move between the grooves and protrusions of the corrugated rod, the reciprocating rod drives the lifting plate to move up and down stably. Since the ratchet is inserted into the lifting plate, the locking rod in the lifting plate cooperates with the ratchet teeth to lock the lifting. The limit block at the top of the ratchet has the same ratchet locking structure, which provides support for the downward movement of the lifting plate and prevents the ratchet from sliding down. During this process, the lifting plate and the brush plate move upward together. The brushes on the brush plate clean the filter screen on the outlet, removing impurities and ensuring that the U-shaped channel remains unobstructed, which is conducive to the collection of impurities and ensures efficient filtration.

[0027] When the ratchet and locking bar are engaged in a locked state, the radial position of the ratchet is maintained by the final force of the opposing tensions of the second and first circumferential springs. At this time, the traction bar is in the straight groove and is subjected to a circumferential force to maintain balance. When the lifting plate rises to the top of the outlet, the third return spring is compressed and stores energy. At the same time, the traction bar slides from the straight groove to the radial groove. Because the force of the second circumferential spring is greater than that of the first circumferential spring, the circumferential force of the traction bar is released after it enters the radial groove. Under the support of the opposing force of the first circumferential spring, the ratchet rotates and the traction bar enters the first low-level groove inside the arc groove through the radial groove. The ratchet and locking bar are disengaged. At this time, the third return spring releases its compression energy, pushing the lifting plate and the ratchet to move down together, driving the brush to clean the filter screen of the outlet. The traction bar moves to the top of the arc groove and then enters the second low-level groove. During this process, the ratchet rotates under the arc design of the arc groove, so that the ratchet and locking bar re-engage and lock, preparing for the next upward cleaning. Attached Figure Description

[0028] Figure 1 This is a three-dimensional cross-sectional view of the overall installation structure of the device of the present invention;

[0029] Figure 2 This is a schematic diagram of the planetary carrier assembly structure of the gearbox housing of the device of the present invention;

[0030] Figure 3 This is a schematic diagram of the disassembled planetary carrier structure of the gearbox of the device of the present invention;

[0031] Figure 4 This is a three-dimensional schematic diagram of the driven gear meshing state of the device of the present invention;

[0032] Figure 5 This is a three-dimensional disassembled schematic diagram of the internal structure of the gearbox of the device of the present invention;

[0033] Figure 6 This is a three-dimensional schematic diagram of the external structure of the cleaning mechanism of the device of the present invention. Figure 1 ;

[0034] Figure 7 This is a three-dimensional schematic diagram of the external structure of the cleaning mechanism of the device of the present invention. Figure 2 ;

[0035] Figure 8 This is a three-dimensional schematic diagram of the internal structure of the cleaning mechanism of the device of the present invention;

[0036] Figure 9 This is a three-dimensional schematic diagram of the installation structure of the reciprocating unit of the device of the present invention;

[0037] Figure 10 This is a three-dimensional schematic diagram of the installation structure of the cleaning unit of the device of the present invention;

[0038] Figure 11 This is a three-dimensional cross-sectional view of the cleaning unit of the device of the present invention;

[0039] Figure 12 This is a three-dimensional schematic diagram of the reset groove structure of the ratchet bar in the device of the present invention;

[0040] Figure 13 This is a cross-sectional schematic diagram of the mounting structure components of the first and second filter cartridges in the device of the present invention;

[0041] In the diagram: Filter box-11; Pre-filter box-12; Motor-13; First sprocket-14; Shaft-15; Rotary joint-16; Sleeve-17; Gearbox body-18; First filter cartridge-19; Second filter cartridge-20; Third filter cartridge-21; First end cover-22; Internal gear ring-23; First driving gear-24; Planetary carrier-25; Planetary gear-26; Partition plate-27; Second end cover-28; Second driving gear-29; Driven gear-30; Double-direction threaded screw-31; First one-way bearing-32; Second one-way bearing-33; Box body-34; Collection port-35; First guide rod-36; Corrugated rod-37; Discharge port-38; U-shaped channel-39; Rotary door- 40; First guide block - 41; Lifting plate - 42; Reciprocating rod - 43; First return spring - 44; Roller - 45; Ratchet - 46; Second guide block - 47; Lifting plate - 48; Brush plate - 49; Ratchet - 50; Inclined groove - 51; Locking rod - 52; Second return spring - 53; Third return spring - 54; Limiting block - 55; First ring body - 56; First circumferential tension spring - 57; Convex key - 58; Sliding groove - 59; Second ring body - 60; Second circumferential tension spring - 61; Straight groove - 62; Arc groove - 63; Radial groove - 64; First low-level groove - 65; Second low-level groove - 66; Fourth return spring - 67; Traction rod - 68; Arc-shaped cover plate - 69; Third end cover - 70. Detailed Implementation

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0043] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Figures 1-13As shown, a high-efficiency filtration-type wastewater treatment device includes a pre-filter 12 and a filter box 11. The filter box 11 contains filter cylinders, which include a first filter cylinder 19, a second filter cylinder 20, and a third filter cylinder 21 arranged sequentially outwards and maintaining a distance between each other. The bottom of the third filter cylinder 21 is equipped with multiple rollers for rotation support. A rotating shaft 15 is driven through the interior of the third filter cylinder 21. A power mechanism is installed at one end of the third filter cylinder 21, and the power mechanism is driven by the rotating shaft 15. A power switching mechanism is provided at the other end of the third filter cylinder 21. The rotating shaft 15 is driven by the power switching mechanism and extends through to the outside of the filter box 11. A cleaning mechanism is provided between the second filter cylinder 20 and the third filter cylinder 21. This cleaning mechanism cleans the filter cylinder walls while simultaneously collecting impurities.

[0045] The pre-filter 12 is equipped with an inlet to introduce the liquid to be treated into the pre-filter 12; the filter box 11 is equipped with an outlet on one side to discharge the treated liquid; the rotating shaft 15 is a hollow structure, with a hollow connection port at one end of the rotating shaft 15 connecting to the inside of the pre-filter 12, and a flow port on the rotating shaft 15 to introduce the liquid to be treated from the pre-filter 12 into the filter box 11 through the hollow rotating shaft 15 and place it in the filter cartridge, which is conducive to the next step of filtration; maintenance ports are provided on the first filter cartridge 19, the second filter cartridge 20 and the third filter cartridge 21, which is also convenient for subsequent cleaning of impurities inside.

[0046] This invention utilizes the pre-sedimentation treatment of the pre-filter 12 and the synergistic effect of multi-stage filter cartridges. A hollow shaft design allows the first filter cartridge 19 to be introduced from the center, avoiding disturbance by sediments and floating matter. The multi-stage filtration system achieves progressive purification from coarse to fine through the step-by-step filtration of the first filter cartridge 19, the second filter cartridge 20, and the third filter cartridge 21. Each filter cartridge handles the removal of impurities within a different particle size range, ensuring the final product is a high-quality purified liquid. When the motor 13 rotates forward, all filter cartridges rotate in the same direction, facilitating liquid filtration and sedimentation. When the motor 13 rotates in reverse, the second filter cartridge 20 and the third filter cartridge 21 rotate in opposite directions, creating shearing action. Simultaneously, the cleaning component is automatically activated, and the arc-shaped cover 69 of the first filter cartridge 19 is opened to collect internal impurities, significantly improving overall filtration efficiency and effluent water quality.

[0047] Furthermore, the power switching mechanism includes a planetary carrier 25 and a cylindrical gearbox 18. The gearbox 18 is sealed to the first end cover 22 and the second end cover 28 at the bottom. One end of the third filter cartridge 21 is fixedly installed on the outer periphery of the gearbox 18, and the other end of the third filter cartridge 21 is mounted on the rotating shaft 15 via a rotating bearing. A partition 27 fixed in the middle of the gearbox 18 divides the gearbox into region one and region two. Region one is adjacent to the end of the filter box 11. A first drive gear 24 is fixed on the rotating shaft 15 inside region one, and an internal gear ring 23 is fixed on the inner wall of the gearbox 18 inside region one. The internal gear ring 23 and the first drive gear 24 are connected. Multiple planetary gears 26 are meshed between the four components, and the multiple planetary gears 26 are rotatably mounted on the supports of the planetary carrier 25. A sleeve 17 is rotatably sleeved on the rotating shaft 15. The sleeve 17 is sealed and fixedly mounted on the end of the filter box 11. One end of the sleeve 17 rotates through the first end cover 22 and enters the first region. The end of the sleeve 17 near the planetary carrier 25 has an integrally formed reduced diameter section, which is installed in the planetary carrier 25 through a second one-way bearing 33. The rotating shaft 15 is connected to the partition plate 27 through a first one-way bearing 32, and the rotating shaft 15 is connected to the second end cover 28 through a rotary bearing. The first one-way bearing 32 and the second one-way bearing 33 define the opposite directions of rotation.

[0048] When the rotating shaft 15 rotates in the forward direction, the first one-way bearing 32 restricts the rotating shaft 15 and drives the internal gear ring 23 to rotate together. The second one-way bearing 33 idles and causes the planetary carrier 25 to rotate with the rotating shaft 15, so that the rotating shaft 15 and the third filter cartridge 21 rotate in the same direction. When the rotating shaft 15 rotates in the reverse direction, the second one-way bearing 33 restricts the planetary carrier 25 to remain stationary. The first one-way bearing 32 idles and causes the planetary gear 26 to mesh with the internal gear ring 23 and the first driving gear 24 at the same time. The rotating shaft 15 and the internal gear ring 23 rotate in opposite directions, so that the rotating shaft 15 and the third filter cartridge 21 rotate in opposite directions.

[0049] It should be noted that the openings and connections of the gearbox body 18 are sealed to prevent external liquids from entering.

[0050] The power switching mechanism of the present invention can not only keep the cleaning mechanism stationary during the filtration process when the motor 13 is rotating forward, which is conducive to sedimentation and filtration inside the filter cartridge, but also automatically start the cleaning mechanism and open the arc-shaped cover plate 69 of the first filter cartridge 19 when the motor 13 is rotating in reverse, so as to simultaneously clean and collect the impurities inside. By switching the forward and reverse directions of the motor 13, the cleaning structure can be automatically started without the need for additional power, simplifying the structure and saving space and cost.

[0051] Furthermore, a second driving gear 29 is fixedly installed on the rotating shaft 15 located in the second region. The second driving gear 29 meshes with a driven gear 30. The drive shaft on the driven gear 30 passes through the second end cover 28 and extends to the region between the second filter cartridge 20 and the third filter cartridge 21. The drive shaft is connected to a bidirectional threaded screw 31 via a coupling. The bidirectional threaded screw 31 is mounted to the cover of the third filter cartridge 21 and the second end cover 28 via rotating bearings. A first guide rod 36 and a corrugated rod 37 are fixedly installed parallel to the bidirectional threaded screw 31 at intervals. The cleaning mechanism includes a housing. 34. Brushes are fixedly installed on the ends of the box body 34 near the two filter cylinders. The box body 34 is sleeved on the bidirectional threaded screw 31. The box body 34 and the bidirectional threaded screw 31 are movable through the nut. The first guide rod 36 and the corrugated rod 37 are slidably inserted in the box body 34. The side of the box body 34 has a collection port 35 and an outlet 38. The collection port 35 and the outlet 38 are connected to each other through a U-shaped channel 39. A filter screen is installed at the outlet 38. A cleaning component is installed in the U-shaped channel 39 near the filter screen. The cleaning component cleans the impurities adhering to the filter screen to avoid clogging.

[0052] It should be noted that there is a gap between the corrugated rod 37 and the through hole of the box 34 to avoid jamming when the two are relatively displaced. The first guide rod 36 can be set to 2, 3 or 4, preferably 2.

[0053] Specifically, during the forward rotation of motor 13, the first one-way bearing 32 of the power switching mechanism restricts the rotation of gearbox 18, causing shaft 15 to drive gearbox 18 and internal gear ring 23 to rotate together. The second one-way bearing 33 on planetary carrier 25 idles, causing planetary carrier 25 to rotate with shaft 15. At this time, shaft 15, gearbox 18, internal gear ring 23, and first drive gear 24 maintain synchronous rotation, preventing the activation of the cleaning mechanism and the opening of the arc-shaped cover 69. Ultimately, shaft 15 and the third filter cartridge 21 rotate in the same direction, and all filter cartridges rotate in the same direction. The resulting centrifugal force enhances the solid-liquid separation effect, and the spiral flow increases the contact time and area between the liquid and the filter screen. During the reverse rotation of motor 13... During the process, the second one-way bearing 33 keeps the planetary carrier 25 stationary, while the planetary gear 26 can rotate freely. At this time, the first one-way bearing 32 idles, and the gearbox 18 does not rotate synchronously with the shaft 15. Meanwhile, the planetary gear 26 simultaneously meshes with the internal gear ring 23 and the first driving gear 24, resulting in the reverse rotation of the shaft 15 and the internal gear ring 23. This further enables the shaft 15 to rotate in the opposite direction to the third filter cartridge 21. Since the shaft 15 rotates in the opposite direction to the partition 27 of the gearbox 18, the second driving gear 29 and the driven gear 30 mesh and rotate. The driven gear 30 rotates on its own, driving the bidirectional threaded screw 31 to rotate. The bidirectional threaded screw 31 and the nut move together to provide a power source for the reciprocating linear movement of the cleaning component.

[0054] Furthermore, the cleaning assembly includes a reciprocating unit and a cleaning unit. The reciprocating unit includes a reciprocating rod 43, a lifting plate 42, and a first guide block 41 fixed to the inner wall of the housing 34. The reciprocating rod 43 slides through the top plate of the housing 34 and slides through the first guide block 41. A first return spring 44 is sleeved on the reciprocating rod 43 located between the top plate of the housing 34 and the first guide block 41. A support plate is fixed on the reciprocating rod 43. The top of the support plate supports the bottom end of the first return spring 44, and the bottom of the support plate detachably abuts against the top end of the first guide block 41. A roller 45 is fixed to the end of the rod 43 away from the top plate of the box 34; several arc-shaped grooves are evenly spaced along the axial direction on the corrugated rod 37, and there are arc-shaped protrusions between adjacent arc-shaped grooves. The roller 45 abuts against the corrugated rod 37. When the box 34 moves relative to the corrugated rod 37, the roller 45 of the reciprocating rod 43 moves between the arc-shaped grooves and the arc-shaped protrusions to generate up-and-down reciprocating movement; a lifting plate 42 is fixed on the reciprocating rod 43 located between the first guide block 41 and the roller 45. The lifting plate 42 lifts the cleaning unit as the reciprocating rod 43 moves upward.

[0055] During the cleaning process of the filter screen, the cleaning mechanism of the present invention not only moves along the filter cylinder axis, but also rotates around the rotating shaft 15 as a whole. The brushes at both ends of the box 34 clean the attached impurities on the rotating filter cylinder and form a spiral cleaning path. The spiral motion combined with the opposite rotation of the filter cylinder forms a cross-shear cleaning effect. The dynamic shearing force generated by the relative motion can destroy the adhesion bond between the impurities and the filter screen, so that stubborn dirt can be completely removed before collection.

[0056] Specifically, when the motor 13 rotates in the reverse direction, the second filter cartridge 20 and the third filter cartridge 21 will rotate in opposite directions, generating a strong shearing force that breaks down the adhesion of impurities. This facilitates the effective collection of impurities in the area between the second filter cartridge 20 and the third filter cartridge 21 by the housing 34. At the same time, the arc-shaped cover 69 opens to collect the impurities inside the second filter cartridge 20 and transfer them to the first filter cartridge 19. The impurities accumulated inside the first filter cartridge 19 are then discharged through an external pump via the suction port and hollow cavity structure on the rotating shaft 15 in conjunction with the rotating joint 16. This achieves online cleaning without disassembly, significantly improving the continuous operation capability and filtration efficiency of the equipment.

[0057] Furthermore, the cleaning unit includes a ratchet 46 and a lifting plate 48. The ratchet 46 is located between the reciprocating rod 43 and the outlet 38. The ratchet 46 movably passes through the top plate of the box 34. A second guide block 47 is fixed at the bottom of the U-shaped channel 39, and the ratchet 46 movably passes through the second guide block 47. A ratchet tooth 50 is provided on the ratchet 46, and a reset component is provided at the end of the ratchet 46. The lifting plate 48 is fixedly installed on the ratchet 46 near the outlet 38. A third reset spring 54 is sleeved on the ratchet 46 located between the lifting plate 48 and the top plate of the box 34. A brush plate 49 is fixed on the lifting plate 48, and a second guide rod is fixed parallel to the ratchet 46. The ends of the second guide rod are respectively fixed to the upper and lower inner walls of the box 34. The second guide rod slides through both the lifting plate 48 and the lifting plate 42. The middle part of the ratchet 46 passes through the lifting plate 42. The device includes a first ratchet locking structure, which comprises an inclined groove 51 on the side of the lifting plate 42 near the ratchet 46. A second return spring 53 and a locking rod 52 are slidably installed inside the inclined groove 51. A flat-bottomed notch is formed on the upper edge of the locking rod 52 away from the end of the spring. The flat-bottomed notch of the locking rod 52 cooperates with the flat-topped notch of the ratchet 50 to restrict the downward movement of the ratchet 46. The end face of the locking rod 52 cooperates with the lower inclined surface of the ratchet 50 to facilitate the upward movement of the ratchet 46. A limiting block 55 is fixed on the top plate of the box 34, and the ratchet 46 passes through the limiting block 55. A second ratchet locking structure is set inside the limiting block 55. When the lifting plate 42 moves upward, it causes the first ratchet locking structure to lift the ratchet 46 upward. The second ratchet locking structure locks the ratchet 46 after it has risen, preventing it from sliding down during the downward movement of the first ratchet locking structure.

[0058] It should be noted that the ratchet 46 is movable in the housing 34 and can move axially and rotate radially. When it moves axially, it causes the lifting plate 48 to rise or fall. When the ratchet 46 rotates, it causes the ratchet 50 to disengage from the locking bar 52, thereby releasing the locking relationship. Under the action of the third return spring 54, it quickly returns to its original position.

[0059] The first and second ratchet locking structures are the same as before, and the second ratchet locking structure will not be described in detail here.

[0060] The cleaning mechanism of the present invention can not only collect impurities inside the area, but also convert the rotation of the second drive gear 29 into the power of movement, and further drive the self-cleaning structure inside the box 34 to complete self-cleaning and maintain a high-efficiency working state.

[0061] Specifically, the bidirectional threaded screw 31 and nut work together to convert rotation into reciprocating linear movement of the housing 34. During the movement of the housing 34, the roller 45 at the bottom of the reciprocating rod 43 travels on the corrugated rod 37. Due to the reset action of the first return spring 44, when the roller 45 moves between the groove and the protrusion of the corrugated rod 37, the reciprocating rod 43 drives the lifting plate 42 to move up and down in a stable manner. Since the ratchet 46 passes through the lifting plate 42, the locking rod 52 provided in the lifting plate 42 engages with the ratchet 50. When the lifting plate 42 is driven upward by the reciprocating rod 43, the flat bottom notch of the locking rod 52 locks the flat top notch of the ratchet 50. The ratchet 46 is lifted, and when the lifting plate 42 descends, the inclined end face of the locking bar 52 slides away from the inclined end face of the ratchet 50, so that the locking bar 52 enters the next lower position of the ratchet 50 to prepare for the next lift; the limit block 55 at the top of the ratchet 46 is provided with the same ratchet locking structure, which provides support for the downward movement of the lifting plate 42 and prevents the ratchet 46 from sliding down; during this process, the lifting plate 48 and the brush plate 49 move upward together, and the brush on the brush plate 49 cleans the filter screen on the outlet 38, so that impurities are removed, ensuring that the flow channel of the U-shaped channel 39 remains unobstructed, which is conducive to the collection of impurities and ensures the efficient operation of filtration;

[0062] Further, the reset component includes a first ring 56 and a second ring 60 both sleeved on the ratchet 46. The first ring 56 is rotatably mounted on the top of the limiting block 55. A protruding key 58 is integrally formed on the inner wall of the first ring 56. A corresponding sliding groove 59 is provided on the ratchet 46 corresponding to the protruding key 58. A first circumferential tension spring 57 is connected between the limiting block 55 and the first ring 56. The second ring 60 is rotatably mounted on the top of the second guide block 47. A second circumferential tension spring 61 is provided between the second ring 60 and the second guide block 47. A retraction groove is formed on the inner wall of the second ring 60. A fourth reset spring 67 and a traction rod 68 are slidably sleeved inside the retraction groove. A reset groove is formed at the bottom of the ratchet 46. The traction rod 68 is slidably sleeved in the reset groove. The reset groove includes a straight groove 62, an arc groove 63, and a radial groove 64 that are interconnected. The straight groove 62 is located at the bottom of the ratchet 46 and is formed along the axial direction. The bottom of the straight groove 62 is formed along the circumference. A radial groove 64 is provided, and the other end of the radial groove 64 is connected to the top of the straight groove 62 by an arc-shaped groove 63. The bottom of the arc-shaped groove 63 is lower than the end of the adjacent radial groove 64, forming a first low-level groove 65. The top of the straight groove 62 is lower than the end of the adjacent arc-shaped groove 63, forming a second low-level groove 66. The second circumferential tension spring 61 has an opposite force to the first circumferential tension spring 57. The force of the second circumferential tension spring 61 is greater than that of the first circumferential tension spring 57. The final force of the two circumferential tension springs locks the ratchet locking structure. When the traction rod 68 slides into the radial groove 64 and rotates, the forces of the two circumferential tension springs lose their parallelism, causing the ratchet 46 to rotate and the ratchet 50 to disengage from the locking rod 52. The reset force of the third reset spring 54 then presses the ratchet 46 down. The ratchet 46 rises and continues to rotate under the combined action of the arc-shaped groove 63 and the traction rod 68, thus locking the ratchet locking structure and achieving reset.

[0063] The radial groove 64 has an inclination angle, specifically, it is inclined from the straight groove 62 to the arc groove 63, with an inclination angle of less than 60 degrees. When the reset force of the third reset spring 54 drives the unfolding, it pushes the ratchet 46 to move down, driving the traction rod 68 to quickly enter the arc groove 63 from the radial groove 64 with the inclination angle, avoiding jamming and maintaining the stability of the structure.

[0064] It should be noted that annular grooves are provided on the top of the limiting block 55 and the second guide block 47, and sliding rings are fixedly provided at the bottom of the first ring body 56 and the second ring body 60. The bottom of the annular groove and the ring body are widened, and an annular cover plate (not shown in the figure) is provided on the top of the annular groove to ensure that the two rotate while the axial displacement does not occur, thus maintaining the stability of the structure.

[0065] When the ratchet 50 engages with the locking lever 52 to form a locked state, the radial position of the ratchet 46 is maintained by the final force of the opposing tensions of the second circumferential tension spring 61 and the first circumferential tension spring 57. At this time, the traction lever 68 is in the straight groove 62, applying a circumferential force to maintain balance. When the lifting plate 48 rises to the top of the outlet 38, the third return spring 54 is compressed and stores energy. At the same time, the traction lever 68 slides from the straight groove 62 into the radial groove 64. Because the force of the second circumferential tension spring 61 is greater than that of the first circumferential tension spring 57, after the traction lever 68 enters the radial groove 64, the circumferential force of the traction lever 68 is released. Under the counterforce of the spring 57, the ratchet 46 rotates, and the traction rod 68 enters the first low-level groove 65 inside the arc-shaped groove 63 through the radial groove 64. The ratchet 50 disengages from the locking rod 52. At this time, the third return spring 54 releases its compression energy, pushing the lifting plate 48 and the ratchet 46 to move down together, driving the brush to clean the filter screen of the outlet 38. The traction rod 68 moves to the top of the arc-shaped groove 63 and then enters the second low-level groove 66. During this process, the ratchet 46 completes its rotation under the arc design of the arc-shaped groove 63, so that the ratchet 50 and the locking rod 52 re-engage and lock, preparing for the next upward cleaning.

[0066] Furthermore, the pre-filter 12 is provided with a liquid inlet, and the filter box 11 is provided with a liquid outlet on one side; the rotating shaft 15 is integrally formed with two independent hollow cavities, and both ends of the rotating shaft 15 are integrally formed with openings, and the openings at both ends are respectively connected to the adjacent hollow cavities. One end of the rotating shaft 15 is connected to the inside of the pre-filter 12, and a flow port is opened on the hollow cavity connected to the pre-filter 12 to introduce the liquid to be treated in the pre-filter 12 into the filter box 11; the other end of the rotating shaft 15 extends to the outside and is equipped with a rotating joint 16. The other end of the rotating joint 16 is connected to an outlet pump, and a suction port is opened on the hollow cavity communicating with the outside.

[0067] It should be noted that the hollow cavity with suction port is set along the axis and the suction port is evenly distributed. When the discharge pump is working, the dirt inside the filter cartridge is sucked out through the suction port, which can avoid disassembly and improve work efficiency.

[0068] Furthermore, a first filter cylinder 19 is fixedly sleeved on the outer circumference of the rotating shaft 15 at intervals, and a second filter cylinder 20 is fixedly sleeved on the outer circumference of the first filter cylinder 19 at intervals. The two ends of the first filter cylinder 19 and the second filter cylinder 20 are fixedly connected to the rotating shaft 15 through a third end cap 70. Multiple collection ports are opened on the first filter cylinder 19, and an arc-shaped cover plate 69 is installed on the collection port through a rotating shaft. A torsion spring is installed on the rotating shaft to ensure that the arc-shaped cover plate 69 is sealed and fitted with the first filter cylinder 19 during the filtration process. A guide plate is fixed on the outer surface of the arc-shaped cover plate 69 away from the rotating shaft. The guide plate and the circumferential area of ​​the first filter cylinder 19 have an opening tilt angle. When the guide plate rotates in the same direction as the liquid flow, the arc-shaped cover plate 69 is sealed and fitted with the first filter cylinder 19. When the guide plate rotates in the opposite direction to the liquid flow, the arc-shaped cover plate 69 is opened to collect impurities in the liquid.

[0069] When motor 13 rotates in reverse, the second filter cartridge 20 and the third filter cartridge 21 will rotate in opposite directions, generating a strong shearing force that breaks down the adhesion of impurities. This facilitates the effective collection of impurities in the area between the second filter cartridge 20 and the third filter cartridge 21 by the housing 34. At the same time, the arc-shaped cover 69 opens to collect the impurities inside the second filter cartridge 20 and transfer them to the first filter cartridge 19. Through the suction port on the rotating shaft 15 and the hollow cavity structure, the impurities accumulated inside the first filter cartridge 19 are discharged through an external pump in cooperation with the rotating joint 16. This achieves online cleaning without disassembly, significantly improving the continuous operation capability and filtration efficiency of the equipment.

[0070] Furthermore, the collection port 35 is provided with a rotating door 40. A second rotating shaft passes through the side of the rotating door away from the top plate of the box body 34. The two ends of the second rotating shaft are rotatably mounted on the two side walls of the box body 34. A second torsion spring is sleeved on both ends of the second rotating shaft. The second torsion spring connects the rotating door 40 and the wall of the box body 34. When the rotating shaft 15 keeps rotating in the forward direction during the filtration process, the second torsion spring keeps the rotating door 40 closed to the collection port 35. When the rotating shaft 15 keeps rotating in the reverse direction during the cleaning process, the rotating door 40 rotates inward to open and collect impurities in the liquid.

[0071] Furthermore, the power mechanism includes a motor 13 with forward and reverse rotation functions and a first sprocket 14. The motor 13 is fixedly installed on the top of the filter box 11, and the first sprocket 14 is fixedly installed on the rotating shaft 15. A driven shaft is rotatably arranged on the inner wall of the box. A pulley and a second sprocket are fixed on the driven shaft in sequence. The output end of the motor 13 is connected to the pulley via belt drive, and the second sprocket is connected to the first sprocket 14 via chain drive. The motor 13 transmits power to the rotating shaft 15 through the first sprocket 14, chain, and other components. The rotating shaft then transmits power to the filter cartridge through a power switching mechanism.

[0072] The motor 13 is equipped with an external power supply. Both the motor and the power supply are commercially available and belong to existing technology. The working principle will not be explained in detail here.

[0073] It should be noted that a nut is provided in the box 34. The nut structure cooperates with the bidirectional threaded screw 31 to make the box 34 reciprocate linearly. The axial length of the nut block is equal to 8-12% of the effective length of the filter cartridge, ensuring the overlap rate of the spiral path and eliminating cleaning dead corners.

[0074] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A high-efficiency filtration-type wastewater treatment device, comprising a pre-filter (12) and a filter box (11), wherein a filter cylinder is disposed inside the filter box (11), characterized in that, The filter cylinder includes a first filter cylinder (19), a second filter cylinder (20), and a third filter cylinder (21) that are arranged in a progressively outward manner and maintain a certain distance from each other. The bottom of the third filter cylinder (21) is equipped with multiple rollers for supporting rotation. A rotating shaft (15) is driven through the interior of the third filter cylinder (21). A power mechanism is installed at one end of the third filter cylinder (21), and the power mechanism is driven and connected to the rotating shaft (15). A power switching mechanism is provided at the other end of the third filter cylinder (21). The rotating shaft (15) is driven and connected to the power switching mechanism and extends through to the outside of the filter box (11). A cleaning mechanism is provided between the second filter cylinder (20) and the third filter cylinder (21). The cleaning mechanism cleans the material adhering to the filter cylinder wall and also collects impurities at the same time.

2. The high-efficiency filtration-type wastewater treatment device according to claim 1, characterized in that, The power switching mechanism includes a planetary carrier (25) and a cylindrical gearbox (18). The gearbox (18) is sealed to the first end cover (22) and the second end cover (28) at the bottom. One end of the third filter cylinder (21) is fixedly installed on the outer periphery of the gearbox (18), and the other end of the third filter cylinder (21) is rotatably installed on the rotating shaft (15). A partition (27) fixed in the middle of the gearbox (18) divides the gearbox into region one and region two. Region one is adjacent to the end of the filter box (11). A first driving gear (24) is fixed on the rotating shaft (15) inside region one. An internal gear ring (23) is fixed on the inner wall of the gearbox (18) inside region one. The internal gear ring (23) and the first driving gear (24) are... Multiple planetary gears (26) are intermeshing and rotatably mounted on a planetary carrier (25). A sleeve (17) is rotatably mounted on a rotating shaft (15). The sleeve (17) is fixed at the end of the filter box (11). One end of the sleeve (17) rotatably passes through the first end cover (22) and enters the first region. The end of the sleeve (17) near the planetary carrier (25) has an integrally formed reduced diameter section. The reduced diameter section is mounted inside the planetary carrier (25) through a second one-way bearing (33). The rotating shaft (15) is connected to the partition plate (27) through a first one-way bearing (32). The rotating shaft (15) is connected to the second end cover (28) through a rotary bearing. The first one-way bearing (32) and the second one-way bearing (33) limit the direction of rotation to be opposite.

3. The high-efficiency filtration-type wastewater treatment device according to claim 2, characterized in that, A second driving gear (29) is fixedly installed on the rotating shaft (15) located in the second region. The second driving gear (29) meshes with a driven gear (30). The drive shaft on the driven gear (30) passes through the second end cover (28) and extends to the area between the second filter cylinder (20) and the third filter cylinder (21). The drive shaft is connected to a double-threaded screw (31) through a coupling. The double-threaded screw (31) is installed with the cylinder cover of the third filter cylinder (21) and the second end cover (28) through rotating bearings. The first guide rod (36) and the corrugated rod (37) are fixedly installed at intervals parallel to the double-threaded screw (31). The cleaning mechanism includes a box (34), and brushes are fixedly installed on the ends of the box (34) near the filter cylinders on both sides. The box (34) is sleeved on the bidirectional threaded screw (31). The box (34) and the bidirectional threaded screw (31) move through a nut. The first guide rod (36) and the corrugated rod (37) slide through the box (34). The side of the box (34) has a collection port (35) and an outlet (38) opposite to each other. The collection port (35) and the outlet (38) are connected to each other through a U-shaped channel (39). A filter screen is provided at the outlet (38). A cleaning component is provided in the U-shaped channel (39) near the filter screen.

4. The high-efficiency filtration-type wastewater treatment device according to claim 3, characterized in that, The cleaning assembly includes a reciprocating unit and a cleaning unit. The reciprocating unit includes a reciprocating rod (43), a lifting plate (42), and a first guide block (41) fixed to the inner wall of the box (34). The reciprocating rod (43) slides through the top plate of the box (34) and slides through the first guide block (41). A first return spring (44) is sleeved on the reciprocating rod (43) located between the top plate of the box (34) and the first guide block (41). A support plate is fixed on the reciprocating rod (43). The top of the support plate supports the bottom end of the first return spring (44), and the bottom of the support plate can be detachably abutted against the top of the first guide block (41). 3) A roller (45) is fixed at the end away from the top plate of the box (34); several arc-shaped grooves are evenly spaced along the axial direction on the corrugated rod (37), and there are arc-shaped protrusions between adjacent arc-shaped grooves. The roller (45) abuts against the corrugated rod (37). When the box (34) moves relative to the corrugated rod (37), the roller (45) of the reciprocating rod (43) moves between the arc-shaped grooves and the arc-shaped protrusions to generate up-and-down reciprocating movement; a lifting plate (42) is fixed on the reciprocating rod (43) located between the first guide block (41) and the roller (45). The lifting plate (42) lifts the cleaning unit as the reciprocating rod (43) moves upward.

5. The high-efficiency filtration-type wastewater treatment device according to claim 4, characterized in that, The cleaning unit includes a ratchet (46) and a lifting plate (48). The ratchet (46) is located between the reciprocating rod (43) and the discharge port (38). The ratchet (46) movably passes through the top plate of the box (34). A second guide block (47) is fixed at the bottom of the U-shaped channel (39). The ratchet (46) movably passes through the second guide block (47). A ratchet tooth (50) is provided on the ratchet (46). A reset component is provided at the end of the ratchet (46). The ratchet (46) near the discharge port (38) is... A lifting plate (48) is fixedly installed on the top plate of the box (34). A third return spring (54) is sleeved on the ratchet (46) located between the lifting plate (48) and the top plate of the box (34). A brush plate (49) is fixed on the lifting plate (48). A second guide rod is fixed parallel to the ratchet (46). The ends of the second guide rod are respectively fixed to the upper and lower inner walls of the box (34). The second guide rod slides through the lifting plate (48) and the lifting plate (42) at the same time. The middle part of the ratchet (46) passes through the lifting plate (42) and lifts... The lifting plate (42) is provided with a first ratchet locking structure, which includes an inclined groove (51) on the side of the lifting plate (42) near the ratchet (46). A second return spring (53) and a locking rod (52) are slidably installed inside the inclined groove (51). A flat-bottomed notch is opened on the upper edge of the locking rod (52) away from the end of the spring. The flat-bottomed notch of the locking rod (52) cooperates with the flat-topped notch of the ratchet (50) to restrict the downward movement of the ratchet (46); the end face of the locking rod (52) and the ratchet (50) The lower slope of 50) facilitates the upward movement of the ratchet (46); a limiting block (55) is fixed on the top plate of the box (34), and the ratchet (46) passes through the limiting block (55). A second ratchet locking structure is set inside the limiting block (55); when the lifting plate (42) moves upward, it causes the first ratchet locking structure to lift the ratchet (46) upward, and the second ratchet locking structure locks the ratchet (46) after it has risen, so as to prevent the first ratchet locking structure from sliding down during its downward movement.

6. The high-efficiency filtration-type wastewater treatment device according to claim 5, characterized in that, The reset component includes a first ring (56) and a second ring (60) both sleeved on the ratchet (46). The first ring (56) is rotatably mounted on the top of the limiting block (55). A protruding key (58) is integrally formed on the inner wall of the first ring (56). A matching groove (59) is provided on the ratchet (46) corresponding to the protruding key (58). A first circumferential tension spring (57) is connected between the limiting block (55) and the first ring (56). The second ring (60) is rotatably mounted on the top of the second guide block (47). A second circumferential tension spring (61) is provided between the second ring (60) and the second guide block (47). A retraction groove is opened on the inner wall of the second ring (60). A fourth reset spring (67) and a traction rod (68) are slidably sleeved inside the retraction groove. A reset groove is opened at the bottom of the ratchet (46). The traction rod (68) is slidably sleeved on the bottom of the ratchet (46). The reset groove is located in the reset groove, which includes a straight groove (62), an arc groove (63), and a radial groove (64) that are interconnected. The straight groove (62) is located at the bottom of the ratchet (46) and is opened along the axial direction. The bottom of the straight groove (62) is opened along the circumference of the radial groove (64). The other end of the radial groove (64) is connected to the top of the straight groove (62) through the arc groove (63). The bottom groove of the arc groove (63) is lower than the end of the adjacent radial groove (64) to form a first low-level groove (65). The top groove of the straight groove (62) is lower than the end of the adjacent arc groove (63) to form a second low-level groove (66). The second circumferential tension spring (61) has the opposite force to the first circumferential tension spring (57). The force of the second circumferential tension spring (61) is greater than that of the first circumferential tension spring (57), and the final force of the two circumferential tension springs makes the ratchet locking structure lock.

7. The high-efficiency filtration-type wastewater treatment device according to claim 1, characterized in that, The pre-loading chamber (12) is provided with an inlet, and the filter chamber (11) is provided with an outlet on one side. The rotating shaft (15) is integrally formed with two independent hollow cavities. Both ends of the rotating shaft (15) are integrally formed with openings, and the openings at both ends are connected to the adjacent hollow cavities. One end of the rotating shaft (15) is connected to the interior of the pre-loading chamber (12), and a flow port is opened on the hollow cavity connected to the pre-loading chamber (12) to introduce the liquid to be treated in the pre-loading chamber (12) into the filter chamber (11). The other end of the rotating shaft (15) extends to the outside and is equipped with a rotating joint (16). The other end of the rotating joint (16) is connected to the outlet pump, and a suction port is opened on the hollow cavity connected to the outside.

8. The high-efficiency filtration-type wastewater treatment device according to claim 7, characterized in that, The first filter cylinder (19) is fixedly sleeved on the outer periphery of the rotating shaft (15) at intervals, and the second filter cylinder (20) is fixedly sleeved on the outer periphery of the first filter cylinder (19) at intervals. The two ends of the first filter cylinder (19) and the second filter cylinder (20) are fixedly connected to the rotating shaft (15) through the third end cap (70). Multiple collection ports are opened on the first filter cylinder (19), and an arc-shaped cover plate (69) is installed on the collection port through the rotating shaft. A torsion spring is installed on the rotating shaft to make the arc-shaped cover plate (69) and the first filter cylinder (19) seal and fit together during the filtration process. A guide plate is fixed on the outer surface of the arc-shaped cover plate (69) away from the rotating shaft. The guide plate and the circumferential area of ​​the first filter cylinder (19) have an opening tilt angle. When the guide plate rotates in the same direction as the liquid flow, the arc-shaped cover plate (69) and the first filter cylinder (19) seal and fit together. When the guide plate rotates in the opposite direction to the liquid flow, the arc-shaped cover plate (69) is opened to collect impurities in the liquid.

9. The high-efficiency filtration-type wastewater treatment device according to claim 7, characterized in that, The collection port (35) is equipped with a rotating door (40). A second rotating shaft is inserted through the side of the rotating door away from the top plate of the box (34). The two ends of the second rotating shaft are rotatably mounted on the two side walls of the box (34). A second torsion spring is sleeved on both ends of the second rotating shaft. The second torsion spring connects the rotating door (40) and the wall of the box (34). When the rotating shaft (15) keeps rotating in the forward direction during the filtration process, the second torsion spring keeps the rotating door (40) and the collection port (35) closed. When the rotating shaft (15) keeps rotating in the reverse direction during the cleaning process, the rotating door (40) rotates inward to open and collect impurities in the liquid.

10. The high-efficiency filtration-type wastewater treatment device according to claim 1, characterized in that, The power mechanism includes a motor (13) with forward and reverse rotation functions and a first sprocket (14). The motor (13) is fixedly installed on the top of the filter box (11), and the first sprocket (14) is fixedly installed on the rotating shaft (15). A driven shaft is rotatably arranged on the inner wall of the box. A pulley and a second sprocket are fixedly mounted on the driven shaft in sequence. The output end of the motor (13) is connected to the pulley through belt drive, and the second sprocket is connected to the first sprocket (14) through chain drive.

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