A self-cleaning rotary water filter

Abstract

The utility model relates to water filter equipment technical field, concretely is a kind of self-cleaning rotary water filter, including filter body, filter drum, solid waste collecting groove and supporting assembly, and solid waste collecting groove is equipped on the outer side of filter drum, and the scraper is rotatably equipped on the top of the groove body of collecting groove, and the rubber scraping strip that contacts filter drum is equipped in the inner side of scraper, and elastic member is equipped between scraper and groove body;Elastic member contains connecting plate, hook and spring, and the sliding slot, sleeve, screw rod and limiting nut are equipped on the outer side of groove body, and the height of connecting plate is adjusted by screwing limiting nut, and then the flexible adjustment of the adhering pressure of rubber scraping strip and filter drum is realized by changing the stretching amount of spring.In addition, groove body is equipped with drain and detachable filter screen, cooperate pressing block, telescopic mechanism and sealing baffle, improve the efficiency of discharging residue and sealing reliability.The utility model can adapt to the filtering demand of different impurity characteristics, prolong the service life of filter screen, reduce maintenance cost, and be applicable to the purification treatment of industrial wastewater, circulating water and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of water filtration equipment technology, specifically a self-cleaning rotary water filter. Background Technology

[0002] In industries such as metallurgy, chemical engineering, textiles, and food processing, rotary water filters have become one of the core devices for solving solid-liquid separation of industrial wastewater and circulating water due to their advantages of dynamic filtration and active cleaning. Existing technologies have included research on self-cleaning designs for rotary water filters. For example, Chinese utility model patent CN202315514U discloses a rotary water filter with a waste collection tray and a spray device. This device drives the filter cylinder to rotate via a drive unit, and the rubber scraper on the waste collection tray outside the filter cylinder physically removes impurities from the filter screen surface. Simultaneously, a high-pressure water jet is sprayed from the spray device at the center of the filter cylinder to assist in cleaning, thus alleviating filter clogging to some extent.

[0003] However, the aforementioned existing technology still has a key flaw in the core process of filter cleaning: the adhesion pressure between the filter and the scraper is not adjustable. In this existing technology, the scraper of the waste collection tray is attached to the filter cartridge through a fixed structure, and its adhesion pressure is determined by the fixed structural dimensions, making it impossible to flexibly adjust according to the adhesion strength of impurities in the actual filtration scenario. When handling light, loose impurities, if the fixed pressure is too high, it can easily cause wear on the filter surface, leading to an increase in filter pore size and a decrease in filtration accuracy over long-term use. When handling sticky, agglomerated impurities, if the fixed pressure is too low, the scraper cannot completely remove stubborn impurities from the filter surface, and the impurities will gradually accumulate and clog the filter pores, resulting in a decrease in filtration flow and an increase in equipment energy consumption. This design with non-adjustable pressure makes it difficult for the equipment to adapt to the filtration needs of different impurity characteristics, limiting its applicability and long-term operational reliability, and urgently requiring targeted improvements. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A self-cleaning rotary water filter includes a filter body, in which a filter cylinder is rotatably disposed. A solid waste collection trough is provided on the outer side of the filter cylinder. The solid waste collection trough includes a tank body. A scraper is rotatably disposed on the top side wall of the tank body facing the filter cylinder. A rubber scraper strip is disposed on the inner edge of the scraper. The inner side of the rubber scraper strip contacts the filter cylinder. An elastic element is disposed between the inner side of the scraper and the inner side of the outer wall of the tank body.

[0006] Preferably, the elastic element includes a connecting plate, which is parallel to the extension direction of the groove. The upper surface of the connecting plate is provided with a plurality of first hooks, and the lower surface of the scraper is provided with a plurality of second hooks that correspond one-to-one with the first hooks. The first hooks and the second hooks are connected by a spring.

[0007] Preferably, the outer wall of the inner side of the groove is provided with sliding grooves at both ends, and the two ends of the connecting plate slide in the sliding grooves. The outer wall of the inner side of the groove is provided with a number of sleeves arranged along the extension direction of the groove. The sleeves are threaded with screws, and the screws pass through the through holes at corresponding positions on the connecting plate. Limit nuts are provided on the screws on both the upper and lower sides of the connecting plate.

[0008] Preferably, a drain outlet is provided in the middle of the tank, and a filter screen is detachably installed at the drain outlet.

[0009] Preferably, the two ends of the tank are respectively provided with pressure blocks that match the inner contour of the tank. The side of the pressure block is in contact with the inner wall of the tank. A telescopic mechanism is provided on the outside of the pressure block. The telescopic mechanism is fixedly installed on the outside of the tank. The extended end of the telescopic mechanism is connected to the outside of the pressure block.

[0010] Preferably, the drain outlet is provided with a recessed stepped surface, and the filter screen is disposed on the stepped surface.

[0011] Preferably, baffles are provided on both sides of the top of the drain outlet facing the pressure block via a torsion spring shaft, and racks are provided on both baffles, with the racks of the two baffles being staggered.

[0012] Preferably, the baffle is initially in a vertical state.

[0013] Preferably, a magnetic sheet is provided at the bottom side of the filter screen.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes a spring in an elastic element to provide the basic bonding force. Combined with a screw and a limiting nut to adjust the height of the connecting plate, the bonding pressure between the scraper and the filter cartridge can be flexibly adjusted. For light, loose impurities, the pressure can be adjusted to a lower level to avoid filter screen wear; for sticky, clumped impurities, the pressure can be adjusted to a higher level to ensure thorough removal. This solves the problems of "incomplete scraping" or "filter screen damage" caused by fixed pressure in existing technologies, and adapts to more diverse filtration needs.

[0016] This utility model's filter screen is magnetically attached to the stepped surface of the drain outlet, allowing for tool-free installation and removal, which can be completed manually, significantly reducing maintenance costs. At the same time, the magnetic force ensures that the filter screen is installed in a precise position, preventing impurity leakage due to installation misalignment.

[0017] The pressure block of this utility model can concentrate and push the impurities in the tank to the drain outlet under the drive of the telescopic mechanism, so as to achieve efficient slag discharge; the baffle achieves initial vertical sealing through the torsion spring shaft, and the staggered rack can prevent the baffle from getting stuck when it is opened. The sealing performance is reliable in the non-slag discharge state, and it avoids impurities from entering the drain outlet and causing blockage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the solid waste collection tank structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is a cross-sectional view of the solid waste collection tank of this utility model;

[0021] Figure 4 for Figure 3 A schematic diagram of the partial structure at point A in the middle.

[0022] In the diagram: 1. Filter body; 2. Filter cartridge; 3. Tank; 4. Scraper; 5. Rubber scraper; 6. Elastic element; 7. Connecting plate; 8. First hook; 9. Second hook; 10. Spring; 11. Slide groove; 12. Sleeve; 13. Screw; 14. Limit nut; 15. Filter screen; 16. Pressure block; 17. Telescopic mechanism; 18. Torsion spring shaft; 19. Baffle; 20. Rack; 21. Magnetic plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example

[0027] like Figure 1-4 As shown, in this embodiment, a self-cleaning rotary water filter includes a filter body 1, which is a horizontally placed cylindrical rigid shell, and a filter cartridge 2 is rotatably supported inside by bearings. The filter body 1 and filter cartridge 2 in this embodiment adopt the prior art solution disclosed in CN202315514U, which will not be described in detail here.

[0028] In this embodiment, a solid waste collection trough is provided on the lower outer side of the filter cylinder 2 to collect impurities scraped off by the scraper. The solid waste collection trough includes a trough body 3, which is a U-shaped structure and its length is consistent with the axial length of the filter cylinder 2. A scraper 4 is rotatably mounted on the top side wall of the trough body 3 facing the filter cylinder 2 via a rotating shaft. The scraper 4 is a long strip of metal plate and its length matches that of the trough body 3. A rubber scraper 5 is fixed to the edge of the scraper 4 near the filter cylinder 2 by bolts. The rubber scraper 5 is made of nitrile rubber and its inner side is in close contact with the outer surface of the filter cylinder 2 to ensure that no impurities are missed.

[0029] An elastic element 6 is provided between the inner side of the scraper 4 and the inner side of the outer wall of the tank 3 to provide continuous contact pressure to the scraper 4. The elastic element 6 includes a connecting plate 7, which is a long strip of metal plate parallel to the extension direction of the tank 3. Several first hooks 8 are welded to the upper surface of the connecting plate 7, and several second hooks 9 are welded to the lower surface of the scraper 4, with the first hooks 8 and the second hooks 9 corresponding one-to-one. A spring 10 is connected between each pair of opposite first hooks 8 and second hooks 9. The spring 10 is made of spring steel and is initially in a slightly stretched state. The elastic force drives the scraper 4 to move the rubber scraper 5 to stick tightly to the filter cylinder 2.

[0030] To achieve adjustable adhesion pressure between the scraper and the filter cylinder 2, the outer wall of the inner side of the tank 3 is provided with sliding grooves 11 at both ends. The two ends of the connecting plate 7 are embedded in the sliding grooves 11 by sliders and can slide up and down along the sliding grooves 11. Several sleeves 12 are also welded to the outer wall of the inner side of the tank 3, which are distributed at intervals along the length of the tank 3. The axis of the sleeves 12 is set in the vertical direction, and the sleeves 12 are provided with internal threads. The internal threads of the sleeves 12 are connected to the screws 13. The top end of the screws 13 passes through the through hole at the corresponding position on the connecting plate 7, and the screws 13 are threaded with limit nuts 14 on both the upper and lower sides of the connecting plate 7. By tightening the limiting nut 14, the connecting plate 7 can be moved up and down along the slide groove 11, thereby adjusting the tension of the spring 10. When the connecting plate 7 moves downward, the tension of the spring 10 increases, the elasticity is enhanced, and the contact pressure between the rubber scraper 5 and the filter cylinder 2 increases accordingly. When the connecting plate 7 moves upward, the tension of the spring 10 decreases, the elasticity is weakened, and the contact pressure decreases accordingly, ultimately achieving precise adjustment of the contact pressure.

[0031] A drain outlet is provided in the middle of the tank 3 to drain the water accumulated in the collection tank. A filter screen 15 is detachably installed at the drain outlet. The filter screen 15 is made of stainless steel woven mesh and is used to perform secondary filtration on the water in the collection tank to prevent fine impurities from being discharged with the water. To facilitate the easy installation and removal of the filter screen 15, a recessed step surface is provided at the drain outlet. The filter screen 15 is placed on the step surface, and a magnetic sheet 21 is embedded on the bottom side of the filter screen 15. The corresponding position of the step surface of the tank 3 is made of carbon steel. The filter screen 15 is quickly positioned and fixed by the adsorption force of the magnetic sheet 21. No tools are required for installation and removal.

[0032] Pressure blocks 16 are respectively provided at both ends of the tank body 3. The shape of the pressure blocks 16 matches the inner contour of the tank body 3, and their sides slide in contact with the inner wall of the tank body 3. A telescopic mechanism 17 is connected to the outer side of the pressure blocks 16. The telescopic mechanism 17 adopts a small cylinder, and its cylinder body is fixed to the outer side of the tank body 3 by a bracket. The extended end of the telescopic mechanism 17 is fixedly connected to the outer side of the pressure blocks 16 by a flange. Through the telescopic movement of the telescopic mechanism 17, the pressure blocks 16 can be pushed to move along the length of the tank body 3, pushing the impurities in the tank body 3 towards the drain outlet, thereby achieving centralized slag discharge.

[0033] To prevent impurities from entering the drain outlet when not discharging slag, baffles 19 are installed on both sides of the top of the drain outlet facing the pressure block 16 via torsion spring shafts 18. The torsion springs within the torsion spring shafts 18 initially drive the baffles 19 in a vertical position. Several racks 20 are provided on the outer side of each baffle 19, and the racks 20 on the two baffles 19 are staggered. When the pressure block 16 moves towards the drain outlet, it drives the baffles 19 to rotate inward around the torsion spring shafts 18. The staggered racks 20 prevent the two baffles 19 from jamming, ensuring smooth rotation. The two pressure plates compress the solid waste into a block for easy removal. The racks effectively block solid waste while also filtering water.

[0034] The working principle of the above technical solution is as follows:

[0035] Start the drive motor to rotate the filter cylinder 2; the filtered water enters from the inlet of the filter body 1 and passes through the composite filter screen of the filter cylinder 2 under pressure, and the clean water is discharged from the outlet; at the same time, the scraper 4, under the elastic force of the spring 10, drives the rubber scraper 5 to stick tightly to the surface of the filter cylinder 2, scraping the attached impurities into the tank 3.

[0036] If a large amount of impurities are found on the surface of the filter screen through the observation window of the filter body 1, tighten the limiting nut 14 on the screw 13 to move the connecting plate 7 downward along the slide groove 11, increasing the tension of the spring 10, thereby increasing the contact pressure between the rubber scraper 5 and the filter cylinder 2, ensuring that the impurities are completely scraped off; if signs of wear are observed on the surface of the filter screen, tighten the limiting nut 14 in the opposite direction to move the connecting plate 7 upward along the slide groove 11, reducing the tension of the spring 10, reducing the contact pressure, and preventing further wear on the filter screen.

[0037] When impurities accumulate to a certain height inside the tank 3, the telescopic mechanism 17 is activated, pushing the pressure blocks 16 at both ends towards the center of the tank 3. As the pressure blocks 16 move towards the drain outlet, they cause the baffles 19 to rotate inward around the torsion spring shaft 18. The staggered rack 20 prevents the two baffles 19 from jamming each other, ensuring smooth rotation. The two pressure plates compress the solid waste into a block for easy removal. The rack design effectively blocks solid waste while also filtering water. After slag discharge, the telescopic mechanism 17 drives the pressure blocks 16 to reset, and the baffles 19 return to a vertical position under the elastic force of the torsion spring inside the torsion spring shaft 18.

[0038] When filter 15 intercepts too many impurities, turn off the equipment, manually remove filter 15, clean the impurities or replace it with a new filter 15, and then position filter 15 on the step surface of the drain outlet by adsorption using the bottom magnetic plate 21 to complete the replacement and restart the equipment.

[0039] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A self-cleaning rotary water filter, characterized in that, The filter includes a filter body (1), a filter cylinder (2) is rotatably disposed inside the filter body (1), a solid waste collection trough is provided on the outer side of the filter cylinder (2), the solid waste collection trough includes a trough body (3), a scraper (4) is rotatably disposed on the top of the side wall of the trough body (3) facing the filter cylinder (2), a rubber scraper (5) is disposed on the inner edge of the scraper (4), the inner side of the rubber scraper (5) is in contact with the filter cylinder (2), and an elastic element (6) is disposed between the inner side of the scraper (4) and the inner side of the outer wall of the trough body (3).

2. The self-cleaning rotary water filter according to claim 1, characterized in that, The elastic element (6) includes a connecting plate (7), which extends parallel to the groove (3). The upper surface of the connecting plate (7) is provided with a plurality of first hooks (8), and the lower surface of the scraper (4) is provided with a plurality of second hooks (9) corresponding one-to-one with the first hooks (8). The first hooks (8) and the second hooks (9) are connected by a spring (10).

3. A self-cleaning rotary water filter according to claim 2, characterized in that, The inner side of the groove (3) is provided with sliding grooves (11) at both ends of the outer wall. The two ends of the connecting plate (7) slide in the sliding grooves (11). The inner side of the groove (3) is provided with a number of sleeves (12) arranged along the extension direction of the groove (3). The sleeves (12) are threaded with screws (13). The screws (13) pass through the through holes at the corresponding positions on the connecting plate (7). Limit nuts (14) are provided on the screws (13) on both the upper and lower sides of the connecting plate (7).

4. A self-cleaning rotary water filter according to claim 1, characterized in that, A drain outlet is provided in the middle of the tank (3), and a filter screen (15) is detachably installed at the drain outlet.

5. A self-cleaning rotary water filter according to claim 4, characterized in that, The two ends of the groove (3) are respectively provided with pressure blocks (16) that match the inner contour of the groove (3). The side of the pressure block (16) is in contact with the inner wall of the groove (3). The outside of the pressure block (16) is provided with a telescopic mechanism (17). The telescopic mechanism (17) is fixedly installed on the outside of the groove (3). The extended end of the telescopic mechanism (17) is connected to the outside of the pressure block (16).

6. A self-cleaning rotary water filter according to claim 5, characterized in that, The drain outlet is provided with a sunken step surface, and the filter screen (15) is provided on the step surface.

7. A self-cleaning rotary water filter according to claim 6, characterized in that, Both sides of the top of the drain outlet facing the pressure block (16) are provided with baffles (19) through the torsion spring shaft (18). Both baffles (19) are provided with racks (20), and the racks (20) of the two baffles (19) are staggered.

8. A self-cleaning rotary water filter according to claim 7, characterized in that, The initial state of the baffle (19) is vertical.

9. A self-cleaning rotary water filter according to claim 7, characterized in that, A magnetic sheet (21) is provided on the bottom side of the filter screen (15).

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