Backwash filter
By designing filter tubes and self-cleaning components evenly distributed in the center of the backwash filter, and utilizing the motor-driven differential pressure backwashing and self-cleaning components, the problem of existing backwash filters requiring shutdown for cleaning is solved, achieving the effects of high efficiency, water saving, and extended filter tube lifespan.
Patent Information
- Application Number
- CN202423079462.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing backwash filters require shutdown during cleaning, leading to severe clogging of the filter tubes, significant energy loss in water flow, the need for high-power water pumps and large amounts of water resources, and increased operating costs and resource waste.
Design a backwash filter with filter tubes evenly arranged around the center line of the tank. Equipped with a self-cleaning component and a backwashing component, the filter tubes are backwashed without stopping by creating a pressure difference through a collection pipe and a water guide pipe driven by a motor. The impeller and scraper of the self-cleaning component clean the inner wall of the filter tubes.
It achieves efficient backwashing without shutdown, reduces water consumption, and improves filtration efficiency and filter tube lifespan.
Smart Images
Figure CN223861428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically to a backwash filter. Background Technology
[0002] Backwash filters are a common type of wastewater treatment equipment. They remove clogging materials trapped in the filter media by flushing the filter bed with reverse water flow. Existing backwash filters typically need to be shut down after a period of operation. A high-pressure water pump is then used to inject external cleaning water into the backwash filter from the outlet, applying pressure from the outside in to dislodge the clogging materials inside the filter tubes. The clogging materials are then discharged from the inlet along with the cleaning water. The entire backwashing process is the reverse of the filtration process, with the inlet and outlet reversed, hence the name "backwash filter." However, when a backwash filter is shut down for cleaning, the filter tubes are usually severely clogged. This results in high resistance within the pipes during backwashing, significant energy loss during water flow, and the need for a more powerful pump to achieve the desired effect. This necessitates prolonged and repeated flushing. However, due to the low flushing efficiency, the system consumes a large amount of water, leading to resource waste and increased operating costs. Utility Model Content
[0003] To overcome the above-mentioned defects, it would be advantageous to provide a novel backwash filter according to this invention.
[0004] To achieve the above objectives, this utility model provides a backwash filter, comprising a support leg and a tank fixedly mounted on the support leg. The tank is divided into upper and lower chambers by a partition. A filter tube is provided on the partition in the upper chamber. An inlet communicating with the lower chamber is provided at the lower part of the tank, and an outlet communicating with the upper chamber is provided at the upper part of the tank. The filter tube is characterized in that it is evenly arranged on a circumference of the same radius around the center line of the tank, and the bottom of the filter tube is connected to the lower chamber. A transition connector with a changing central hole is provided at the center of the partition. A backwash assembly is connected to the upper and lower parts of the transition connector. The backwash assembly includes: a fixed connection... A drain pump is connected to the middle of the tank body; a first drain pipe is connected between the transition connector and the drain pump in the upper cavity; a motor is connected directly below the tank body; a second drain pipe with its lower end closed is connected to the motor output shaft and the transition connector respectively; a water guide pipe is connected to the second drain pipe; and a collection pipe is set in the lower cavity, with one end connected to the water guide pipe and the other end attached to the partition plate, and its center line and the center line of the filter pipe are located on the same radius of the circumference centered on the center line of the tank body. The center hole of the transition connector is smaller at the top and larger at the bottom. A bearing is installed in the center hole of the lower part of the transition connector. The outer ring of the bearing is fixedly connected to the transition connector, and the inner ring of the bearing is connected to the upper end of the second drain pipe.
[0005] A further technical feature of this utility model is:
[0006] The diameter of the collection tube is larger than the diameter of the filter tube.
[0007] The filter tube is equipped with a self-cleaning component.
[0008] The self-cleaning assembly includes an impeller located at the bottom of the filter tube, a small gear coaxially and fixedly connected to the impeller, two large gears symmetrically arranged and meshing with the small gear, and two scrapers attached to the inner wall of the filter tube and connected to the large gears via guide rods. The inner wall of the filter tube is provided with two annular grooves, and the scrapers are provided with sliding heads that match the annular grooves at corresponding positions. A support plate fixedly connected to a partition is provided at the bottom of the filter tube, and the impeller is fixed on the support plate.
[0009] The sliding head, which matches the groove below the inner wall of the filter, is fixedly connected to the guide rod via a sliding column.
[0010] The beneficial effects of this utility model are as follows: The filter tubes in this utility model are evenly arranged on a circumference of the same radius, with the center line of the tank as the center, and the bottom of the filter tubes is connected to the lower cavity; the partition has a transition connector with a changing center hole at its center position, and the transition connector is connected to a backwashing assembly above and below. The backwashing assembly includes: a drain pump fixedly connected to the middle of the tank; a first drain pipe located in the upper cavity, connected between the transition connector and the drain pump; a motor connected directly below the tank; a second drain pipe with its lower end closed, connected to the motor output shaft and the transition connector respectively; a water guide pipe connected to the second drain pipe; and a receiver arranged in the lower cavity, with one end connected to the water guide pipe and the other end attached to the partition, and its center line and the center line of the filter tube located on a circumference of the same radius centered on the center line of the tank. The manifold has a transition connector with a smaller upper hole and a larger lower hole. A bearing is installed in the lower center hole of the transition connector. The outer ring of the bearing is fixedly connected to the transition connector, and the inner ring of the bearing is connected to the upper end of the second drain pipe. With this structure, when the filter tubes need cleaning, the motor directly below the tank is started, driving the second drain pipe, the guide pipe, and the collection pipe to rotate. When the collection pipe aligns with one of the filter tubes (this can be pre-programmed by the intelligent control system), the water in the filter tube automatically enters the collection pipe and guide pipe under gravity. At this time, due to the pressure difference between the water in the tank and the air inside the filter tube, the water in the tank flows back into the filter tube under this pressure difference. Impurities on the inner wall of the filter tube are washed away and fall into the collection pipe and guide pipe, and then discharged by the drain pump in the middle of the tank. This process does not require the entire filter to be shut down; one filter tube can be backwashed while the others continue to operate normally. This cycle effectively cleans all filter tubes, and the entire backwashing process does not require an external water source and only requires a regular drain pump to achieve the desired backwashing effect.
[0011] In addition, since a self-cleaning component is also provided in this embodiment, each filter tube will have water flow driving the impeller to rotate whether it is working normally or backwashing. The rotation of the impeller drives the small gear to rotate, and at the same time drives the two large gears meshing with the small gear to rotate. Finally, the two scrapers that are in contact with the inner wall of the filter tube rotate to clean the inside of the filter tube. This cleaning mode is uninterrupted, so the filtration efficiency of the filter tube will be higher and the service life will be longer.
[0012] These and other aspects of the present invention will be more clearly illustrated by referring to the embodiments described below. Attached Figure Description
[0013] The structure of this utility model, as well as its further objects and advantages, will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:
[0014] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;
[0015] Figure 2 yes Figure 1 The structural perspective view of the embodiment shown;
[0016] Figure 3 yes Figure 2 A cross-sectional view of the bottom of the middle filter tube;
[0017] Figure 4 yes Figure 2 A cross-sectional view of the intermediate transition connector section. Detailed Implementation
[0018] The specific embodiments of this utility model will now be described in conjunction with the accompanying drawings.
[0019] In this document, the directional representations used to explain the structure and / or operation of the various parts of the disclosed embodiments, such as "up," "down," "front," and "back," are not absolute but relative. These representations are appropriate when the various parts of the disclosed embodiments are located in the positions shown in the figures, and these representations will also change according to the change in the position or reference frame of the disclosed embodiments.
[0020] Reference Figures 1 to 4A backwash filter includes a support leg 1 and a tank 2 fixedly mounted on the support leg. The tank 2 is divided into upper and lower chambers by a partition 3. A filter tube 4 is provided on the partition 3 in the upper chamber. An inlet 5 communicating with the lower chamber is provided at the lower part of the tank 2, and an outlet 6 communicating with the upper chamber is provided at the upper part of the tank. The filter tube 4 is evenly arranged on a circumference of the same radius with the center line of the tank 2 as the center, and the bottom of the filter tube 4 is communicating with the lower chamber. A transition connector 7 with a changing diameter center hole is provided at the center position of the partition 3. A backwash assembly 8 is connected to the upper and lower parts of the transition connector 7. The backwash assembly 8 includes a drain pump 81 fixedly connected to the middle of the tank. The first drain pipe 82, located in the upper cavity, is connected between the transition connector 7 and the drain pump 81. The motor 83 is connected directly below the tank. The second drain pipe 84, with its lower end closed, is connected to the output shaft of the motor 83 and the transition connector respectively. The water guide pipe 85 is connected to the second drain pipe. The collection pipe 86, located in the lower cavity, is connected to the water guide pipe 85 at one end and is attached to the partition 3 at the other end. Its center line and the center line of the filter pipe 4 are located on a circle with the same radius as the center line of the tank. The center hole of the transition connector 7 is smaller at the top and larger at the bottom. A bearing 71 is installed in the center hole of the lower part of the transition connector. The outer ring of the bearing is fixedly connected to the transition connector, and the inner ring of the bearing is connected to the upper end of the second drain pipe 84. In this embodiment, the diameter of the collection tube is larger than the diameter of the filter tube; a self-cleaning component 9 is provided inside the filter tube, the self-cleaning component 9 includes an impeller 91 disposed at the bottom of the filter tube, a small gear 92 coaxially fixedly connected to the impeller, two large gears 93 symmetrically arranged relative to the small gear and meshing with the small gear, and two scrapers 95 attached to the inner wall of the filter tube 4 respectively connected to the large gears 93 through guide rods 94, wherein the inner wall of the filter tube is provided with two annular grooves 41, and the scrapers 95 are provided with sliding heads 96 at corresponding positions that match the annular grooves 41. In this embodiment, the sliding heads 96 that match the lower grooves 41 of the inner wall of the filter are fixedly connected to the guide rods 94 through sliding columns 97; a support plate 10 fixedly connected to the partition plate 3 is provided at the bottom of the filter tube, and the impeller 91 is fixed on the support plate.
[0021] In this invention, the filter pipe 4 is evenly arranged on a circumference of the same radius with the center line of the tank 2 as the center, and the bottom of the filter pipe 4 is connected to the lower cavity; the partition plate is provided with a transition connector 7 with a center hole diameter change at the center position, and the transition connector is connected to the upper and lower backwash assembly 8. The backwash assembly 8 includes: a drain pump 81 fixedly connected to the middle of the tank, a first drain pipe 82 located in the upper cavity between the transition connector 7 and the drain pump 81, a motor 83 connected directly below the tank, a second drain pipe 84 with its lower end closed and connected to the output shaft of the motor 83 and the transition connector 7 respectively, a water guide pipe 85 connected to the second drain pipe 84, and a collection pipe 86 arranged in the lower cavity, one end connected to the water guide pipe 85, the other end attached to the partition plate 3, and its center line and the center line of the filter pipe 4 located on a circumference of the same radius centered on the center line of the tank. The connecting part has a smaller upper part and a larger lower part in the central hole. A bearing 71 is installed in the lower central hole of the transition connecting part. The outer ring of the bearing 71 is fixedly connected to the transition connecting part 7, and the inner ring of the bearing 71 is connected to the upper end of the second drain pipe 84. With this structure, when the filter pipe 3 needs to be cleaned, the motor 83 directly below the tank is started, which drives the second drain pipe 84, the water guide pipe 85 and the collection pipe 86 to rotate. When the collection pipe 86 is aligned with a filter pipe 4 (the specific alignment can be preset by the intelligent control system), the water stored in the filter pipe 4 automatically enters the collection pipe 86 and the water guide pipe 85 under the action of gravity. At this time, due to the pressure difference between the water in the tank and the air inside the filter pipe, the water in the collection pipe tank 2 enters the filter pipe in the opposite direction under the action of this pressure difference. The impurities on the inner wall of the filter pipe 4 are washed away and fall into the collection pipe 86 and the water guide pipe 85, and then discharged by the drain pump 81 in the middle of the tank. This process does not require the entire filter to be shut down. One filter tube 4 can be backwashed while the other filter tubes continue to operate as usual. This cycle can effectively clean all filter tubes. Moreover, the entire backwashing process does not require the introduction of an external water source, and the desired backwashing effect can be achieved simply by using a regular drain pump 81.
[0022] In addition, since a self-cleaning component 9 is also provided in this embodiment, each filter tube 4 will have water flow driving the impeller 91 to rotate whether it is working normally or backwashing. The rotation of the impeller drives the small gear to rotate, and at the same time drives the two large gears meshing with the small gear to rotate. Finally, the two scrapers 95 that are attached to the inner wall of the filter tube rotate to clean the inside of the filter tube. This cleaning mode is uninterrupted, so the filtration efficiency of the filter tube 4 will be higher and the service life will be longer.
[0023] The technical content and features of this utility model have been disclosed above. However, it is understood that, under the inventive concept of this utility model, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed herein, as well as other combinations that explicitly include these features. All such modifications and / or combinations fall within the technical field to which this utility model pertains and are within the protection scope of the claims of this utility model.
Claims
1. A backwash filter, comprising a support leg, a tank fixedly mounted on the support leg, the tank being divided into an upper chamber and a lower chamber by a partition, wherein a filter tube is disposed on the partition in the upper chamber, an inlet communicating with the lower chamber is disposed at the lower part of the tank, and an outlet communicating with the upper chamber is disposed at the upper part of the tank, characterized in that: The filter tubes are evenly arranged on a circumference of the same radius with the tank centerline as the center, and the bottom of the filter tubes is connected to the lower cavity. The partition has a transition connector with a variable diameter center hole at the center position. The transition connector is connected to a backwashing assembly at the top and bottom. The backwashing assembly includes: a drain pump fixedly connected to the middle of the tank, a first drain pipe located in the upper cavity between the transition connector and the drain pump, a motor connected directly below the tank, a second drain pipe with its lower end closed and connected to the motor output shaft and the transition connector respectively, a water guide pipe connected to the second drain pipe, and a collection pipe located in the lower cavity, with one end connected to the water guide pipe and the other end attached to the partition, and its centerline and the centerline of the filter tube located on a circumference of the same radius with the tank centerline as the centerline. The center hole of the transition connector is smaller at the top and larger at the bottom. A bearing is installed in the center hole of the lower part of the transition connector. The outer ring of the bearing is fixedly connected to the transition connector, and the inner ring of the bearing is connected to the upper end of the second drain pipe.
2. The backwash filter as described in claim 1, characterized in that: The diameter of the collection tube is larger than the diameter of the filter tube.
3. The backwash filter as described in claim 1 or claim 2, characterized in that: The filter tube is equipped with a self-cleaning component.
4. The backwash filter as described in claim 3, characterized in that: The self-cleaning assembly includes an impeller located at the bottom of the filter tube, a small gear coaxially and fixedly connected to the impeller, two large gears symmetrically arranged and meshing with the small gear, and two scrapers attached to the inner wall of the filter tube and connected to the large gears via guide rods. The inner wall of the filter tube is provided with two annular grooves, and the scrapers are provided with sliding heads that match the annular grooves at corresponding positions. A support plate fixedly connected to a partition is provided at the bottom of the filter tube, and the impeller is fixed on the support plate.
5. The backwash filter as described in claim 4, characterized in that: The sliding head, which matches the groove below the inner wall of the filter tube, is fixedly connected to the guide rod via a sliding column.