Reverse osmosis sewage treatment equipment

Abstract

The invention relates to the technical field of sewage treatment, in particular to reverse osmosis sewage treatment equipment which comprises a filter, the filter comprises a centrifugal structure and a switching structure, the centrifugal structure has a filtering state and a cleaning state, and the switching structure is used for switching the centrifugal structure between the filtering state and the cleaning state. When the centrifugal structure is in a filtering state, the centrifugal structure can efficiently separate impurities in the cleaning agent through centrifugal force, accumulation of the impurities on the surface of the filter element is reduced, and the blocking probability of the filter element is reduced; when the centrifugal structure is in a cleaning state, the centrifugal structure and clear water can generate relative movement, so that the cleaning of the filter element and the centrifugal structure is completed, and the service life of the filter element and the centrifugal structure is prolonged. The filter element is cleaned by clean water, so that accumulation of impurities on the surface of the filter element can be greatly reduced, the abrasion rate of the filter element is reduced, the cleanliness of a cleaning agent is guaranteed, the reverse osmosis membrane cleaning effect is improved, and stable and efficient operation of reverse osmosis sewage treatment equipment is ensured.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a reverse osmosis wastewater treatment device. Background Technology

[0002] The wafer manufacturing process generates wastewater with complex compositions, containing pollutants such as grinding particles, acids and alkalis, heavy metals, organic matter, and fluoride ions. Direct discharge of this type of wastewater would cause serious pollution, and considering the need for resource recycling, it requires advanced treatment to meet wafer production recycling or discharge standards.

[0003] Reverse osmosis (RO) systems are a crucial component in the deep treatment and reuse of wastewater from wafer fabrication. Because the wastewater contains various complex pollutants, the design and configuration of RO systems require higher precision and complexity compared to conventional systems. An RO system comprises a pretreatment unit, a core RO unit, and a post-treatment unit. During operation, a high-pressure pump provides sufficient inlet pressure to drive the RO process and overcome osmotic pressure resistance. The wastewater first passes through the pretreatment unit, which intercepts large particles and adjusts the pH value to reduce the load on subsequent treatments. Then, the wastewater enters the core RO unit, where the RO membrane retains salts, ions, and other solutes, allowing only water molecules to pass through. The post-treatment unit further purifies and optimizes the initially purified water produced by the core RO unit, removing residual trace pollutants. Throughout the process, conductivity meters and pressure gauges monitor water quality and pressure in real time to ensure system safety, and the entire process is fully automated. The pretreatment unit, core RO unit, and post-treatment unit complement each other and work collaboratively. Through scientific process integration, they effectively address the complex pollutants in the wastewater, ensuring that the final product meets the established standards for wafer fabrication reuse or discharge.

[0004] During long-term operation, reverse osmosis membranes are prone to accumulating contaminants and scaling, leading to decreased water production and deteriorated effluent quality. Therefore, regular cleaning is necessary to restore the membrane's filtration performance, and the reverse osmosis system is equipped with auxiliary units. These auxiliary units mainly consist of a cleaning pump and a filter. During cleaning, the cleaning pump delivers a specially formulated cleaning agent to the filter. Since the cleaning agent may contain impurities, directly introducing it into the core reverse osmosis unit could damage the membrane. Therefore, the filter must first perform precision filtration of the cleaning agent to remove impurity particles. The filtered cleaning agent then enters the core reverse osmosis unit for targeted cleaning of the membrane, ensuring stable and efficient system operation.

[0005] However, existing filters rely on filter cartridges to filter cleaning agents, which makes it easy for large particles of impurities in the cleaning agent to directly adhere to and accumulate on the surface of the filter cartridge. The continuous accumulation of impurities significantly increases fluid flow resistance and reduces the delivery efficiency of the cleaning agent. Simultaneously, under the impact of fluid flow, the impurities accumulated on the filter cartridge surface will frequently rub against the cartridge surface, accelerating filter cartridge wear, shortening its lifespan, and causing frequent replacements. This not only increases the workload of equipment maintenance but also significantly increases the cost of consumables, impacting the overall economic efficiency of the reverse osmosis system. Summary of the Invention

[0006] Therefore, it is necessary to provide a reverse osmosis wastewater treatment device to address the problem that impurities in current reverse osmosis systems tend to accumulate on the surface of the filter element, leading to frequent filter element replacements.

[0007] The above objectives are achieved through the following technical solutions: A reverse osmosis wastewater treatment device includes a filter, the filter comprising: outer barrel.

[0008] A filter element, coaxially disposed inside the outer cylinder, is used to filter the cleaning agent.

[0009] The centrifugal structure has a filtration state and a cleaning state. When the centrifugal structure is in the filtration state, it can separate impurities in the cleaning agent through centrifugal force. When the centrifugal structure is in the cleaning state, it can generate relative motion with clean water.

[0010] A switching structure is provided to drive the centrifugal structure to switch between the filtration state and the cleaning state.

[0011] Furthermore, the centrifugal structure includes a rotating frame, multiple annular discs, and a first power source; the rotating frame is coaxially rotatably connected to the outer cylinder; the multiple annular discs are uniformly fixed on the rotating frame along their own axes, and each annular disc has a deformable elastic segment; the first power source is used to drive the rotating frame to rotate.

[0012] When the centrifugal structure is in the filtration state, the switching structure causes the elastic segment to bulge; when the centrifugal structure is in the cleaning state, the elastic segment returns to a flat shape.

[0013] Furthermore, the switching structure includes multiple actuators, each actuator being located between two adjacent annular discs, and the actuators being capable of reciprocating along the axial direction of the annular discs.

[0014] When the centrifugal structure is in the filtering state, the actuator moves to the elastic segment of the annular disc on the supporting side, causing it to form a protrusion; when the centrifugal structure is in the cleaning state, the actuator returns to the middle position between two adjacent annular discs.

[0015] Furthermore, the switching structure also includes a drive rod, multiple connecting rings, multiple telescopic rods, and a second power source. The drive rod is fixedly connected to the rotating frame and passes through multiple annular discs along the axial direction of the annular discs. The drive rod is provided with multiple sliding grooves extending along the axial direction of the annular discs. The multiple connecting rings are evenly sleeved on the drive rod, and one end of each connecting ring is connected to the end of an actuator rod. The connecting rings and the actuator rods move synchronously along the axial direction of the drive rod. One end of each telescopic rod is connected to an actuator rod, and the other end passes through a connecting ring and is embedded in a sliding groove. The second power source is used to drive the connecting rings to move along the axial direction of the drive rod.

[0016] Furthermore, during the axial movement of the telescopic rod within the sliding groove, the telescopic rod can cause the connecting ring to deflect relative to the driving rod.

[0017] Furthermore, the extending direction of the sliding groove forms an angle with the axis of the drive rod.

[0018] Furthermore, a cleaning component is fixedly provided on the connecting ring, and the cleaning component can fit against the outer wall of the filter element.

[0019] Furthermore, the cross-section of the actuator is elliptical, and the actuator can also rotate around its own axis during axial movement.

[0020] Furthermore, the depth of the sliding groove gradually changes along the axial direction of the drive rod; the telescopic rod and the actuator are slidably connected coaxially, and a first elastic element is provided between the telescopic rod and the actuator, the elastic force of the first elastic element always causing the telescopic rod to move away from the actuator; a first protrusion is provided at one end of the telescopic rod that is embedded in the actuator, and an inclined groove that cooperates with the first protrusion is provided on the inner wall of the actuator; when the telescopic rod moves, the actuator is driven to rotate through the cooperation of the first protrusion and the inclined groove.

[0021] Furthermore, the sliding groove wall is provided with a limiting groove, and the end of the telescopic rod that extends into the sliding groove is provided with a limiting protrusion. The limiting protrusion cooperates with the limiting groove to prevent the telescopic rod from coming out of the sliding groove.

[0022] The beneficial effects of this invention are: This invention provides a reverse osmosis wastewater treatment device, which includes a filter comprising a centrifugal structure and a switching structure. The centrifugal structure has a filtration state and a cleaning state, and the switching structure is used to switch the centrifugal structure between the filtration state and the cleaning state. When the switching structure drives the centrifugal structure to switch to the filtration state, the centrifugal structure efficiently separates impurities in the cleaning agent through centrifugal force, reducing the frequency of contact between impurities and the filter element, thereby reducing the accumulation of impurities on the filter element surface, reducing the probability of filter element clogging, and ensuring the flow efficiency of the cleaning agent. When the switching structure drives the centrifugal structure to switch to the cleaning state, the centrifugal structure and clean water generate relative motion. Under the scouring action of the relative motion, impurities attached to the surface of the filter element and the centrifugal structure are removed, effectively extending the service life of the filter element and the centrifugal structure, continuously ensuring the cleanliness of the cleaning agent, improving the cleaning effect of the reverse osmosis membrane, and ultimately ensuring the stable and efficient operation of the reverse osmosis wastewater treatment device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a reverse osmosis wastewater treatment device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a filter in a reverse osmosis wastewater treatment device provided in an embodiment of the present invention; Figure 3 for Figure 2 The front view of the structure shown; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 4 Cross-sectional view along the BB direction; Figure 6 for Figure 4 A magnified view of a section at point C; Figure 7 This is a schematic diagram of the centrifugal structure in the filter of a reverse osmosis wastewater treatment device in a cleaning state, provided by an embodiment of the present invention. For ease of observation, the annular disc on the upper side of the actuator is omitted. Figure 8 This is a schematic diagram of the centrifugal structure in the filter of a reverse osmosis wastewater treatment device provided in an embodiment of the present invention when it is in the filtration state. For ease of observation, the annular disc on the upper side of the actuator is omitted. Figure 9 for Figure 7 A magnified view of a section at point D; Figure 10 for Figure 8 A magnified view of a section at point E in the middle; Figure 11 An exploded view of a filter in a reverse osmosis wastewater treatment device provided in an embodiment of the present invention; Figure 12 for Figure 11 Exploded view of the inner cylinder, centrifugal structure, switching structure and filter element in the structure shown; Figure 13 for Figure 12 Exploded view of the centrifugal structure, switching structure and filter element in the structure shown; Figure 14 for Figure 13 The diagram shows the structure of the filter element and the fixing sleeve. Figure 15 for Figure 13 A schematic diagram of the rotating frame in the structure shown; Figure 16 for Figure 13 A schematic diagram of the drive frame in the structure shown; Figure 17 for Figure 13 A schematic diagram of the annular disc and actuator in the structure shown; Figure 18 for Figure 13 Top view of the annular disc and actuator rod in the structure shown; Figure 19 for Figure 13 A schematic diagram of the actuator, telescopic rod, and connecting ring in the structure shown; Figure 20 for Figure 13 A schematic diagram of the telescopic rod and the drive rod in the structure shown; Figure 21 for Figure 13 A cross-sectional view of the actuator in the structure shown.

[0024] in: 100. First-aid kit; 200. Cleaning pump; 310. Outer cylinder; 311. Cover; 320. Inner cylinder; 321. Slag outlet; 322. Through hole; 410. Rotating frame; 411. Drive rod; 412. Sliding groove; 420. Annular disc; 421. Elastic section; 422. Rigid section; 430. Rotating motor; 510, Actuating rod; 511, First compression spring; 512, Inclined groove; 520, Telescopic rod; 521, First protrusion; 522, Ball; 523, Limiting protrusion; 530, Connecting ring; 531, Cleaning component; 540, Drive frame; 541, Mounting rod; 542, Drive ring; 550, Telescopic cylinder; 610. Filter element; 611. Fixing sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "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 used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] The following reference Figures 1 to 21 This invention describes a reverse osmosis wastewater treatment device, which includes a chemical tank 100, a cleaning pump 200, and a filter.

[0029] Specifically, the medicine box 100 is a cylindrical sealed cylindrical structure, and the inner cavity of the medicine box 100 is used to store acidic or alkaline special cleaning agents.

[0030] The cleaning pump 200 is a high-pressure quantitative delivery pump. Its input end is sealed to the bottom of the medicine tank 100, and its output end is connected to the filter. The cleaning pump 200 is used to quantitatively deliver the cleaning agent in the medicine tank 100 at a stable pressure and flow rate, ensuring the precise and directional delivery of the cleaning agent from the medicine tank 100 to the filter.

[0031] The filter includes an outer cylinder 310, an inner cylinder 320, a centrifugal structure, a switching structure, and a filter element 610.

[0032] The outer cylinder 310 is a hollow cylindrical sealed structure, fixedly placed on the ground or other supporting surface. A cap 311 is detachably fixed to the top of the outer cylinder 310 via bolts, used to close the opening at the top of the outer cylinder 310. The outer cylinder 310 and the cap 311 together form a completely sealed working space, isolating it from the external environment, ensuring no leakage of internal fluids and that the operation is not affected by external environmental interference. A liquid inlet is fixedly provided on the bottom side wall of the outer cylinder 310, and the liquid inlet is fixedly connected to the output end of the cleaning pump 200 via a sealed pipeline, serving as the channel for cleaning agent or clean water to enter the filter.

[0033] The inner cylinder 320 is a double-layered cylindrical structure coaxially disposed inside the outer cylinder 310, integrally formed from top to bottom with a cylindrical section and a frustum section. The diameter of the frustum section gradually increases vertically downwards to ensure that impurities separated during the cleaning process collect to the bottom of the inner cylinder 320 under the action of gravity and centrifugal force. Multiple through holes 322 are evenly distributed on the bottom end wall of the inner cylinder 320, through which cleaning agent or clean water enters and completely fills the interior of the inner cylinder 320. A slag outlet 321 is also fixedly provided on the bottom side wall of the inner cylinder 320, penetrating the side wall of the outer cylinder 310 and communicating with the external environment, for completely discharging the impurities collected at the bottom of the inner cylinder 320.

[0034] The centrifugal structure includes a rotating frame 410, multiple annular discs 420, and a first power source.

[0035] The rotating frame 410 is a cylindrical frame structure, coaxially rotatably connected to the lower wall of the inner cylinder 320. Multiple connecting rods extending vertically are vertically fixed on the rotating frame 410, and these connecting rods are evenly distributed circumferentially.

[0036] Multiple annular discs 420 are evenly spaced vertically, coaxially mounted with the rotating frame 410, and fixedly mounted on multiple connecting rods. Each annular disc 420 is a frustum-shaped structure that gradually slopes downward away from its own axis. Each annular disc 420 has multiple elastic segments 421 capable of elastic deformation and multiple rigid segments 422 for support evenly fixedly mounted circumferentially, with the elastic segments 421 and rigid segments 422 alternating in distribution.

[0037] The first power source is a rotary motor 430, which is fixedly installed on the outer side of the lower wall of the outer cylinder 310. The output shaft of the rotary motor 430 passes through the lower wall of the outer cylinder 310 and is coaxially fixedly connected to the lower end face of the rotating frame 410. The rotary motor 430 is used to provide stable and continuous rotational power to the rotating frame 410, driving the rotating frame 410 to drive the annular disc 420 to achieve high-speed rotation.

[0038] The switching structure includes multiple actuators 510, multiple drive rods 411, multiple connecting rings 530, multiple telescopic rods 520, a drive frame 540, and a second power source.

[0039] Each actuator 510 is disposed between the elastic segments 421 of two adjacent annular discs 420, and the number of actuators 510 between two adjacent annular discs 420 is the same as the number of elastic segments 421 on each annular disc 420. The extension direction of the actuator 510 is the same as the extension direction of the elastic segment 421.

[0040] Each drive rod 411 is vertically fixed on the rotating frame 410, parallel to the connecting rod of the rotating frame 410, and the number of drive rods 411 is the same as the number of elastic segments 421 on each annular disc 420.

[0041] The connecting ring 530 has a ring structure, and multiple connecting rings 530 are spaced apart and sleeved on the drive rod 411, and all of them slide in cooperation with the drive rod 411. An extension block is fixedly provided at one end of the connecting ring 530, and the end of the extension block away from the connecting ring 530 is connected to the actuator 510 to realize the synchronous movement of the connecting ring 530 and the actuator 510 in the vertical direction.

[0042] Each drive rod 411 has multiple sliding grooves 412 evenly spaced along the vertical direction, and the sliding grooves 412 extend vertically. Each connecting ring 530 is provided with a connecting hole corresponding to a telescopic rod 520. One end of each telescopic rod 520 is coaxially connected to an actuator 510, and the other end passes through the connecting hole on a connecting ring 530 and is embedded in a sliding groove 412, and can slide up and down along the sliding groove 412.

[0043] The drive frame 540 is a cylindrical frame structure, coaxially mounted inside the inner cylinder 320 and capable of moving vertically within the inner cylinder 320. Multiple vertical rods are fixedly mounted on the drive frame 540 in the vertical direction, and multiple mounting rods 541 are fixedly mounted between adjacent vertical rods. Each mounting rod 541 extends horizontally and is fixedly mounted on a vertical rod at equal intervals. Each mounting rod 541 has a drive ring 542 fixedly mounted in a direction away from the axis of the drive frame 540. The outer wall of the connecting ring 530 has an annular groove. The drive ring 542 fits into the groove with a clearance, and each drive ring 542 is embedded in a groove on a connecting ring 530 to achieve synchronous vertical movement between the drive ring 542 and the connecting ring 530.

[0044] The second power source is a telescopic cylinder 550, which is fixedly installed at the center of the upper end face of the cover 311. The output shaft of the telescopic cylinder 550 passes through the cover 311 and is coaxially and fixedly connected to the upper end face of the drive frame 540, and the output shaft of the telescopic cylinder 550 can rotate relative to its own cylinder body. The telescopic cylinder 550 is used to provide a stable vertical driving force for the drive frame 540, realizing the up and down movement of the drive frame 540.

[0045] Filter element 610 is a hollow cylindrical precision filter structure filled with a high-porosity filter medium for secondary filtration of the cleaning agent, thoroughly trapping minute impurities. A fixing sleeve 611 is coaxially fitted onto the upper end of filter element 610. The inner wall of the fixing sleeve 611 connects to the outer wall of the upper end of filter element 610, and the outer wall of the fixing sleeve 611 abuts against the inner wall of the drive frame 540, ensuring that the fixing sleeve 611 and filter element 610 do not move synchronously with the up-and-down movement of the drive frame 540. The lower end of filter element 610 is connected to the rotating frame 410.

[0046] During the use of the filter, the centrifugal structure has a filtration state and a cleaning state.

[0047] When the centrifugal structure is in filtration mode, the cleaning agent enters through the liquid inlet at the bottom of the outer cylinder 310 and through multiple through holes 322 at the bottom of the inner cylinder 320 and completely fills the inner cylinder 320.

[0048] The telescopic cylinder 550 starts and generates an upward driving force, causing the drive frame 540 to move vertically upward. The drive frame 540 drives the drive ring 542 to move upward synchronously via the mounting rod 541. The drive ring 542 drives the connecting ring 530 to move upward along the drive rod 411 via the slot on the connecting ring 530. The connecting ring 530 drives the actuator 510 to move vertically upward via the extension block. During this process, the actuator 510 drives the telescopic rod 520 to move upward synchronously within the sliding groove 412. The telescopic rod 520 forms a radial limit on the actuator 510 and the connecting ring 530, effectively restricting the actuator 510 and the connecting ring 530 from freely deflecting relative to the drive rod 411. After the actuator 510 moves to the preset position, the telescopic cylinder 550 stops working. At this time, the upper end face of the actuator 510 supports the lower surface of the elastic segment 421 of the annular disc 420 above it, forcing the elastic segment 421 of the annular disc 420 to deform and bulge upward, and the centrifugal structure is fully in the filtration state.

[0049] Subsequently, the rotating motor 430 starts, and its output shaft drives the rotating frame 410 to rotate at high speed. The rotating frame 410 drives the annular disc 420, the actuator rod 510, the telescopic rod 520, the connecting ring 530, and the drive frame 540 to rotate synchronously via the connecting rod. When the annular disc 420 rotates at high speed, the raised elastic section 421 on its surface significantly enhances the centrifugal force effect. Due to the density difference between the impurities in the cleaning agent and the cleaning agent itself, the centrifugal forces they experience are completely different. The denser impurities move away from the axis of the inner cylinder 320 under the action of centrifugal force, eventually accumulating at the bottom of the inner cylinder 320. Meanwhile, the clean cleaning agent, after separating the impurities, gradually moves upward along the surface of the annular disc 420, enters the filter element 610 for further precision filtration, and finally enters the core reverse osmosis unit.

[0050] Therefore, by using the actuator 510 to make the elastic segment 421 of the annular disc 420 protrude, the centrifugal force of the annular disc 420 when rotating at high speed is greatly enhanced, which realizes the efficient separation of impurities from the cleaning agent, reduces the accumulation of impurities on the surface of the filter element 610, effectively reduces the probability of clogging of the filter element 610, and extends the service life of the filter element 610.

[0051] When the centrifugal structure is in the cleaning state, clean water enters and fills the inner cylinder 320 to clean the filter element 610, the annular disc 420, the actuator 510 and other components.

[0052] The telescopic cylinder 550 starts and generates a downward driving force, which drives the connecting ring 530 downward through the drive frame 540, mounting rod 541, and drive ring 542. The connecting ring 530 drives the actuator 510 to move vertically downward to the preset position, after which the telescopic cylinder 550 stops working. At this time, the actuator 510 is located in the middle position between two adjacent annular discs 420, and the centrifugal structure is completely switched back to the cleaning state.

[0053] Subsequently, the rotating motor 430 starts, driving the annular disc 420, actuator 510, telescopic rod 520, and other components to rotate synchronously via the rotating frame 410. Clean water, under the centrifugal force generated by the rotation, washes the surface of the filter element 610. At this time, the elastic segment 421 of the annular disc 420 returns to its planar state without external force, and the centrifugal force generated by the rotation is relatively small. The planar surface of the annular disc 420 moves at high speed relative to the clean water, achieving thorough cleaning of the surface of the annular disc 420. Simultaneously, the actuator 510 is located between two adjacent annular discs 420, with fixed micro-gaps between it and the upper and lower annular discs 420. When clean water passes through these gaps at high speed, it creates high-speed turbulence, further washing and cleaning the surface of the actuator 510 and the upper and lower end faces of the annular discs 420. Finally, under the centrifugal force of the annular disc 420, the clean water moves away from the axis of the inner cylinder 320 and converges towards the bottom along the inner wall of the frustum section of the inner cylinder 320, eventually being completely discharged through the slag outlet 321 at the bottom of the inner cylinder 320. This completes the thorough cleaning of components such as the filter element 610, the annular disc 420, and the actuator 510, further extending the overall service life of the filter.

[0054] Furthermore, multiple sliding grooves 412 extend inclined to one side along the outer wall of the drive rod 411. When the centrifugal structure switches to the filtration state, the connecting ring 530 drives the telescopic rod 520 to move vertically upward synchronously through the actuator 510. The telescopic rod 520 slides along the inclined trajectory of the sliding groove 412, causing the actuator 510 to deflect relative to the drive rod 411. This results in the actuator 510 forming an oblique protrusion on the elastic segment 421 of the annular disc 420. The direction of the oblique protrusion is opposite to the direction of rotation of the annular disc 420, thereby increasing the contact area between the annular disc 420 and the cleaning agent during rotation, further improving the centrifugal force generated during rotation, and enhancing the separation effect of impurities and chemicals in the cleaning agent.

[0055] Furthermore, multiple rollers are evenly arranged at both the upper and lower ends of the filter element 610. The rollers are cylindrical rolling structures. The outer wall of the roller at the upper end of the filter element 610 rolls with the inner wall of the fixed sleeve 611, and the outer wall of the roller at the lower end of the filter element 610 rolls with the inner wall of the rotating frame 410. The rollers provide rolling support for the filter element 610, allowing the filter element 610 to rotate relative to the annular disc 420.

[0056] A cleaning component 531 is fixedly installed on the side wall of the connecting ring 530. The cleaning component 531 is an elastic block structure made of wear-resistant rubber. The inner edge of the cleaning component 531 is adapted to the outer wall contour of the filter element 610.

[0057] When the centrifugal structure switches to filtration mode, as the telescopic rod 520 slides along the inclined sliding groove 412, it causes the connecting ring 530 to deflect at a certain angle relative to the drive rod 411. This deflection motion directly causes the cleaning component 531 to move away from the surface of the filter element 610, completely separating the cleaning component 531 from the surface of the filter element 610. This effectively prevents the cleaning component 531 from clogging the filtration channels of the filter element 610 during filtration, ensuring smooth flow of the cleaning agent and the filtration efficiency of the filter element 610.

[0058] When the centrifugal structure switches to the cleaning state, the telescopic rod 520 slides back along the sliding groove 412, causing the connecting ring 530 to deflect and reset relative to the drive rod 411. At this time, the cleaning element 531 on the connecting ring 530 is tightly attached to the outer surface of the filter element 610. Subsequently, the rotating motor 430 starts, driving the rotating frame 410, the annular disc 420, the connecting ring 530, and the cleaning element 531 to rotate synchronously. Under the rolling support of the rotating wheel, the filter element 610 can rotate relative to the annular disc 420, causing the cleaning element 531 to form relative friction with the surface of the filter element 610, removing impurities and contaminants attached to the surface of the filter element 610. The scraped impurities are collected with the clean water to the bottom of the inner cylinder 320 and discharged through the slag outlet 321, significantly improving the cleaning effect of the filter element 610 and further extending the service life of the filter element 610.

[0059] Furthermore, the cross-section of the actuator 510 is a standard ellipse.

[0060] Specifically, the depth of the sliding groove 412 gradually increases linearly from bottom to top along the axial direction of the drive rod 411. The actuator 510 is rotatably connected to the extension block on the connecting ring 530.

[0061] The telescopic rod 520 and the actuator rod 510 are slidably connected coaxially, with the end of the telescopic rod 520 embedded in the actuator rod 510. A first elastic element is fixedly provided between the telescopic rod 520 and the actuator rod 510. The first elastic element is a first compression spring 511, with both ends of the first compression spring 511 fixedly connected to the end face of the telescopic rod 520 and the inner wall of the actuator rod 510, respectively. The elastic force of the first compression spring 511 always pushes the telescopic rod 520 to move away from the actuator rod 510.

[0062] The telescopic rod 520 is embedded in the outer wall of one end of the actuator rod 510 and a first protrusion 521 is fixedly provided. The inner wall of the actuator rod 510 is provided with a groove 512 that matches the first protrusion 521. The inclination direction of the groove 512 matches the circumferential direction of the actuator rod 510.

[0063] When the centrifugal structure switches to filtration mode, the telescopic rod 520 slides along the inclined sliding groove 412. As the telescopic rod 520 moves to a deeper area of ​​the sliding groove 412, the elastic force of the first compression spring 511 is released, pushing the telescopic rod 520 to extend away from the actuator rod 510 until the outer wall of the telescopic rod 520 is tightly fitted with the groove wall of the sliding groove 412. During this process, the first protrusion 521 slides along the inclined groove 512, causing the actuator rod 510 to rotate relative to the extension block of the connecting ring 530. When the preset position is reached, the long axis end of the elliptical actuator rod 510 can form a high arc-shaped protrusion on the elastic segment 421 of the annular disc 420, thereby increasing the centrifugal force generated when the annular disc 420 rotates and enhancing the separation effect of impurities and chemicals in the cleaning agent.

[0064] When the centrifugal structure switches to the cleaning state, the telescopic rod 520 slides back along the sliding groove 412. As the telescopic rod 520 moves to a region where the sliding groove 412 is shallower, the groove wall of the sliding groove 412 presses against the telescopic rod 520, causing it to move towards the actuator rod 510 and compress the first compression spring 511. During this process, the first protrusion 521 slides in the opposite direction along the inclined groove 512, thereby causing the actuator rod 510 to rotate in the opposite direction relative to the extension block. The long axis end of the elliptical actuator rod 510 rotates away from the elastic section 421 and resets to the middle position between two adjacent annular discs 420, ensuring that the surface of the annular discs 420 returns to a flat state.

[0065] Furthermore, the inner wall of the sliding groove 412 is provided with a continuous limiting groove along its inclined extension direction. The cross-section of the limiting groove is arc-shaped, and its extension trajectory is consistent with the inclined direction of the sliding groove 412.

[0066] A ball 522 is fixedly installed at one end of the telescopic rod 520 that extends into the sliding groove 412. The outer wall of the ball 522 is provided with a limiting protrusion 523 that matches the limiting groove. The arc curvature of the limiting protrusion 523 is the same as that of the limiting groove. The limiting protrusion 523 and the limiting groove form a sliding fit to ensure that the telescopic rod 520 maintains a stable movement trajectory during its movement along the sliding groove 412, and to prevent the telescopic rod 520 from deviating or getting stuck.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A reverse osmosis sewage treatment apparatus, characterized by comprising: Includes a filter, the filter comprising: outer cylinder; A filter element, coaxially disposed inside the outer cylinder, is used to filter the cleaning agent; The centrifugal structure has a filtration state and a cleaning state. When the centrifugal structure is in the filtration state, it can separate impurities in the cleaning agent through centrifugal force. When the centrifugal structure is in the cleaning state, it can generate relative motion with clean water. A switching structure is provided to drive the centrifugal structure to switch between the filtration state and the cleaning state.

2. The reverse osmosis sewage treatment apparatus according to claim 1, characterized by The centrifugal structure includes a rotating frame, multiple annular discs, and a first power source; the rotating frame is coaxially rotatably connected to the outer cylinder; the multiple annular discs are uniformly fixed on the rotating frame along their own axes, and each annular disc has a deformable elastic segment; The first power source is used to drive the rotating frame to rotate; When the centrifugal structure is in the filtration state, the switching structure causes the elastic segment to bulge. When the centrifugal structure is in the cleaning state, the elastic segment returns to a planar shape.

3. The reverse osmosis wastewater treatment equipment according to claim 2, characterized in that, The switching structure includes multiple actuators, each actuator being located between two adjacent annular discs, and the actuator being capable of reciprocating along the axial direction of the annular discs; When the centrifugal structure is in the filtering state, the actuator moves to the elastic segment of the annular disc on the supporting side, causing it to form a protrusion; When the centrifugal structure is in the cleaning state, the actuator returns to the middle position between two adjacent annular discs.

4. The reverse osmosis wastewater treatment equipment according to claim 3, characterized in that, The switching structure further includes a drive rod, multiple connecting rings, multiple telescopic rods, and a second power source. The drive rod is fixedly connected to the rotating frame and passes through multiple annular discs along the axial direction of the annular discs. The drive rod is provided with multiple sliding grooves extending along the axial direction of the annular discs. The multiple connecting rings are evenly sleeved on the drive rod, and one end of each connecting ring is connected to the end of an actuator rod. The connecting rings and actuator rods move synchronously along the axial direction of the drive rod. One end of each telescopic rod is connected to an actuator rod, and the other end passes through a connecting ring and is embedded in a sliding groove. The second power source is used to drive the connecting rings to move along the axial direction of the drive rod.

5. The reverse osmosis wastewater treatment equipment according to claim 4, characterized in that, During the axial movement of the telescopic rod within the sliding groove, the telescopic rod can cause the connecting ring to deflect relative to the driving rod.

6. The reverse osmosis wastewater treatment equipment according to claim 5, characterized in that, The extending direction of the sliding groove forms an angle with the axis of the drive rod.

7. The reverse osmosis wastewater treatment equipment according to claim 5, characterized in that, A cleaning component is fixedly installed on the connecting ring, and the cleaning component can fit against the outer wall of the filter element.

8. The reverse osmosis wastewater treatment equipment according to claim 4, characterized in that, The cross-section of the actuator is elliptical, and the actuator can also rotate around its own axis during axial movement.

9. The reverse osmosis wastewater treatment equipment according to claim 8, characterized in that, The depth of the sliding groove gradually changes along the axial direction of the drive rod; the telescopic rod and the actuator are slidably connected coaxially, and a first elastic element is provided between the telescopic rod and the actuator, the elastic force of the first elastic element always keeps the telescopic rod away from the actuator; The telescopic rod is provided with a first protrusion at one end of the actuator rod, and the inner wall of the actuator rod is provided with an inclined groove that cooperates with the first protrusion. When the telescopic rod moves, the actuator rod is driven to rotate through the cooperation of the first protrusion and the inclined groove.

10. The reverse osmosis wastewater treatment equipment according to claim 4, characterized in that, The sliding groove wall is provided with a limiting groove, and the end of the telescopic rod that extends into the sliding groove is provided with a limiting protrusion. The limiting protrusion cooperates with the limiting groove to prevent the telescopic rod from coming out of the sliding groove.

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