Backwash filter

Abstract

The utility model provides a backwashing filter, which belongs to the technical field of water treatment and comprises a filter cartridge and a filter mechanism arranged in the filter cartridge, a backwashing cleaning component is further arranged in the filter cartridge and comprises a liquid discharge pipe arranged in the middle of the filter mechanism, and a liquid discharge end of the liquid discharge pipe penetrates through an outer cambered surface of the filter cartridge and extends to the outside. A rotating pipe is rotationally connected between the liquid inlet end of the liquid discharging pipe and the bottom of the filter cylinder, the liquid inlet end of the rotating pipe is matched with the filter mechanism, a valve is arranged at the liquid discharging end of the liquid discharging pipe, a plurality of supporting plates are arranged at the edge of the filter mechanism, rotating frames are rotationally connected to the middles of the supporting plates, and spiral scraping plates are arranged outside the rotating frames; and the spiral scrapers are matched with the filtering mechanism. According to the utility model, stubborn dirt attached to the filtering surface of the filtering mechanism is thoroughly stripped through the compound motion of scraping and axial propulsion, so that the deposited dirt of the device is efficiently removed, the problems of blockage and residue of filtering holes in the traditional backwashing process can be avoided, and the filtering efficiency recovery rate is obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to backwash filters. Background Technology

[0002] Water treatment refers to the process of purifying water bodies through physical, chemical, or biological methods, aiming to remove impurities, pollutants, and harmful substances from water to meet specific water quality requirements. Currently, in order to improve the treatment effect, special backwash filters are usually used during treatment.

[0003] Existing backwash filters generally consist of a shell and multiple filter cartridges. During operation, filtered water flows in the opposite direction to flush the surface of the filter cartridges, thereby washing off the attached impurities and discharging them through the drain pipe. However, in practical applications, this method, which relies solely on backwash pressure, has significant shortcomings. It is difficult to effectively remove stubborn dirt, resulting in incomplete cleaning of the scale on the surface of the filter cartridges, which in turn causes the filter holes to become clogged, affecting the recovery of filtration efficiency. Utility Model Content

[0004] In view of this, the present invention provides a backwash filter that can thoroughly remove stubborn dirt adhering to the filter surface of the filter mechanism through a combination of scraping and axial propulsion motion. It not only efficiently removes the accumulated dirt of the device, but also avoids the problem of filter hole clogging and residue during traditional backwashing, and significantly improves the filtration efficiency recovery rate.

[0005] To solve the above-mentioned technical problems, this utility model provides a backwash filter, including a filter cartridge and a filtration mechanism disposed therein. The filter cartridge is also provided with a backwash cleaning component, which includes a drain pipe disposed in the middle of the filtration mechanism. The drain end of the drain pipe passes through the outer arc surface of the filter cartridge and extends to the outside. A rotating pipe is rotatably connected between the inlet end of the drain pipe and the bottom of the filter cartridge. The inlet end of the rotating pipe is configured to cooperate with the filtration mechanism. A valve is provided at the drain end of the drain pipe. Multiple support plates are provided at the edge of the filtration mechanism. A rotating frame is rotatably connected to the middle of each support plate. A spiral scraper is provided on the outside of each rotating frame. The spiral scraper is configured to cooperate with the filtration mechanism. That is, through a combined motion of scraping and axial advancement, the stubborn dirt attached to the filter surface of the filtration mechanism is thoroughly removed. This not only efficiently removes the accumulated dirt of the device, but also avoids the problem of filter hole clogging and residue during traditional backwashing, significantly improving the filtration efficiency recovery rate.

[0006] The backwash cleaning assembly also includes a motor located at the bottom of the filter cartridge. The output shaft of the motor is fixedly connected to the rotating tube, thus providing a drive source for the rotating tube.

[0007] It also includes a drive assembly, which includes a fixed cylinder disposed inside the rotating tube. A sliding rod is slidably connected to the upper end of the fixed cylinder. A crown tooth is rotatably connected to the upper end of the sliding rod. A crown tooth is provided at the lower end of the rotating frame. The crown tooth is engaged with the crown tooth, thus achieving a quick connection.

[0008] The drive assembly also includes a second motor located at the upper end of the sliding rod. The output shaft of the second motor is fixedly connected to the first crown tooth, thus providing a drive source for the first crown tooth.

[0009] The drive assembly also includes an electric telescopic rod located at the bottom of the fixed cylinder. The telescopic end of the electric telescopic rod is fixedly connected to the lower end of the sliding rod, thereby controlling the raising and lowering of the sliding rod.

[0010] A differential pressure sensor is installed inside the pressure measuring port on the outer arc surface of the filter cartridge, which detects the pressure difference between the liquid entering and exiting the filter cartridge.

[0011] The filtration mechanism includes a base plate located at the lower end of the inner cavity of the filter cartridge. A drain pipe is fixedly installed in a fixing hole in the middle of the base plate. Multiple mounting holes are provided at the edge of the base plate. Cylindrical filter screens are respectively installed between the mounting holes and the filter cartridge. The filter cartridge is provided with a locking hole that mates with each cylindrical filter screen. Multiple mounting holes are all configured to mate with the liquid inlet end of the rotating tube. Support plates are fixedly installed at the lower end of the inner cavity of the mounting holes. Spiral scrapers contact the inner arc surface of the adjacent cylindrical filter screens on the same side, thereby achieving the purpose of water filtration.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] 1. When the motor starts, its output shaft rotates, driving the rotating tube to rotate synchronously. When the liquid inlet end of the rotating tube aligns with the lower opening of one of the cylindrical filter screens, the valve opens, and the water flow reverses, thus rinsing the filter surface of the cylindrical filter screen. The reverse water flow carries impurities out through the rotating tube and the drain pipe. At the same time, the drive assembly drives the spiral scraper to rotate along the inner wall of the cylindrical filter screen. The spiral scraper thoroughly removes stubborn dirt adhering to the filter surface of the cylindrical filter screen through a combination of scraping and axial propulsion. After the filter surface of the cylindrical filter screen is cleaned, the drive assembly resets, and then the rotating tube moves to the next cylindrical filter screen until all cylindrical filter screens are rinsed and cleaned. Through the synchronous synergistic effect of reverse rinsing and mechanical brushing, not only is the accumulated dirt of the device efficiently removed, but the problem of filter hole clogging and residue during traditional backwashing is also avoided, significantly improving the filtration efficiency recovery rate.

[0014] 2. When the electric telescopic rod is started, its telescopic end pushes the sliding rod upward, so that crown tooth one meshes with crown tooth two at the bottom of the rotating frame. Then, motor two starts, and its output shaft drives crown tooth one to drive the spiral scraper to rotate along the inner wall of the cylindrical filter screen. The spiral scraper thoroughly removes the stubborn dirt attached to the filter surface of the cylindrical filter screen through a compound motion of scraping and axial propulsion, which plays a role in rapid driving. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the backwash filter of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is an enlarged structural diagram of section B of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 100, filter cartridge; 200, drain pipe; 201, rotating pipe; 202, valve; 203, support plate; 204, rotating frame; 205, spiral scraper; 206, motor one; 300, fixed cylinder; 301, sliding rod; 302, crown tooth one; 303, crown tooth two; 304, motor two; 305, electric telescopic rod; 400, differential pressure sensor; 500, base plate; 501, cylindrical filter screen. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0021] This embodiment provides a backwash filter, such as Figure 1-4The filter includes a filter cartridge 100 and a filtration mechanism housed therein. The lower end of the filter cartridge 100 has an inlet pipe, and the upper end has an outlet pipe. A backwashing cleaning assembly is also provided inside the filter cartridge 100. The backwashing cleaning assembly includes a drain pipe 200 located in the middle of the filtration mechanism. The drain end of the drain pipe 200 penetrates the outer arc surface of the filter cartridge 100 and extends to the outside. A rotating pipe 201 is rotatably connected between the inlet end of the drain pipe 200 and the bottom of the filter cartridge 100. The inlet end of the rotating pipe 201 is fitted with the filtration mechanism. A valve 202 is provided at the drain end of the drain pipe 200. Multiple support plates 203 are provided at the edge of the structure. A rotating frame 204 is rotatably connected to the middle of each support plate 203. A spiral scraper 205 is provided on the outside of each rotating frame 204. The spiral scraper 205 is configured to cooperate with the filtration mechanism. The backwash cleaning assembly also includes a motor 206 located at the bottom of the filter cartridge 100. The output shaft of the motor 206 is fixedly connected to the rotating tube 201. The output shaft of the motor 206 drives the rotating tube 201 to rotate from one of the filter cartridges 100 to the last filter cartridge 100 and then stops. When performing the cleaning process again, the operation can be reversed to prevent the wire from getting tangled.

[0022] Initiating the backwashing mode involves starting motor 206, whose output shaft rotates to drive rotating tube 201 to rotate synchronously. When the inlet end of rotating tube 201 aligns with the lower opening of one of the filter mechanisms, valve 202 opens, causing water to flow in the opposite direction, thus rinsing the filter surface of the filter mechanism. The reverse water flow carries impurities out through rotating tube 201 and drain pipe 200. Simultaneously, it drives spiral scraper 205 to rotate along the inner wall of the filter mechanism. The spiral scraper 205 thoroughly removes stubborn dirt adhering to the filter surface of the filter mechanism through a combined motion of scraping and axial propulsion. After the filter surface is cleaned, rotating tube 201 moves to the next cleaning station until the electric telescopic rod 305 is reversed and reset, thus completing the rinsing and cleaning process. Through the synchronous synergistic effect of backwashing and mechanical cleaning, not only is the accumulated dirt in the device efficiently removed, but the problem of filter hole clogging and residue during traditional backwashing is also avoided, significantly improving the filtration efficiency recovery rate.

[0023] like Figure 1-4 As shown, the filtration mechanism includes a base plate 500 disposed at the lower end of the inner cavity of the filter cartridge 100, a drain pipe 200 fixedly installed in a fixing hole in the middle of the base plate 500, multiple mounting holes at the edge of the base plate 500, cylindrical filter screens 501 respectively disposed between the mounting holes and the filter cartridge 100, a locking hole on the filter cartridge 100 that mates with each cylindrical filter screen 501, multiple mounting holes that mate with the liquid inlet end of the rotating tube 201, support plates 203 respectively fixedly installed at the lower end of the inner cavity of the mounting holes, and spiral scrapers 205 respectively contacting the inner arc surface of the adjacent cylindrical filter screens 501 on the same side.

[0024] Under normal filtration conditions, the liquid to be treated enters from the bottom inlet pipe of the filter cartridge 100, is filtered by the cylindrical filter screen 501, and then enters the space between the upper end of the filter cartridge 100 and the bottom plate 500. Finally, it is discharged through the drain pipe, while impurities are trapped on the filter surface of the cylindrical filter screen 501.

[0025] like Figure 2-4 As shown, the system also includes a drive assembly, which includes a fixed cylinder 300 disposed within the rotating tube 201. The fixed cylinder 300 is located in the vertical tube body at the outer end of the rotating tube 201. A sliding rod 301 is slidably connected to the upper end of the fixed cylinder 300. A crown tooth 302 is rotatably connected to the upper end of the sliding rod 301. A crown tooth 303 is provided at the lower end of the rotating frame 204. The crown tooth 303 is movably engaged with the crown tooth 302. The circular trajectory of the fixed cylinder 300, the crown tooth 302, and the liquid inlet end of the rotating tube 201 coincides with the axis of the multiple cylindrical filter screens 501. The drive assembly also includes a motor 304 disposed at the upper end of the sliding rod 301. The output shaft of the motor 304 is fixedly connected to the crown tooth 302. The drive assembly also includes an electric telescopic rod 305 disposed at the bottom of the fixed cylinder 300. The telescopic end of the electric telescopic rod 305 is fixedly connected to the lower end of the sliding rod 301.

[0026] When the electric telescopic rod 305 is activated, its telescopic end pushes the sliding rod 301 upward, causing the crown tooth 302 to mesh with the crown tooth 303 at the bottom of the rotating frame 204. Then, the motor 304 is activated, and its output shaft drives the crown tooth 302 to rotate the spiral scraper 205 along the inner wall of the cylindrical filter screen 501. The spiral scraper 205 completely removes the stubborn dirt attached to the filter surface of the cylindrical filter screen 501 through a combination of scraping and axial propulsion.

[0027] like Figure 1 As shown, a differential pressure sensor 400 is installed in the pressure measuring port on the outer arc surface of the filter cartridge 100. When the differential pressure sensor 400 detects that the pressure difference between the inlet and outlet of the filter cartridge 100 exceeds the standard, the backwashing mode is automatically started.

[0028] The working principle of the backwash filter provided by this utility model is as follows: Under normal filtration conditions, the liquid to be treated enters from the bottom inlet pipe of the filter cylinder 100, passes through the cylindrical filter screen 501, and enters the space between the upper end of the filter cylinder 100 and the bottom plate 500, and is finally discharged through the drain pipe. Impurities are trapped on the filter surface of the cylindrical filter screen 501. When the differential pressure sensor 400 detects that the pressure difference between the inlet and outlet of the filter cylinder 100 exceeds the standard, the backwash mode is automatically activated, and the motor 206 is started. Its output shaft rotates to drive the rotating tube 201 to rotate synchronously. When the inlet end of the rotating tube 201 matches the lower opening of one of the cylindrical filter screens 501, the valve 202 opens. At this time, the water flow reverses, thereby rinsing the filter surface of the cylindrical filter screen 501. The reverse water flow carries impurities and is discharged through the rotating tube 201 and the drain pipe 200. At the same time, the electric telescopic rod 3... When the device is started, its telescopic end pushes the sliding rod 301 upward, causing the crown tooth 302 to mesh with the crown tooth 303 at the bottom of the rotating frame 204. Then, the motor 304 starts, and its output shaft drives the crown tooth 302 to drive the spiral scraper 205 to rotate along the inner wall of the cylindrical filter screen 501. The spiral scraper 205 thoroughly removes the stubborn dirt attached to the filter surface of the cylindrical filter screen 501 through a compound motion of scraping and axial advancement. After the filter surface of the cylindrical filter screen 501 is cleaned, the electric telescopic rod 305 reverses and resets. Then, the rotating tube 201 moves to the next cylindrical filter screen 501 until all cylindrical filter screens 501 are rinsed and cleaned. Through the synchronous synergistic effect of backwashing and mechanical brushing, not only is the accumulated dirt of the device efficiently removed, but the problem of filter hole clogging and residue during traditional backwashing is also avoided, significantly improving the filtration efficiency recovery rate.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A backwash filter, characterized in that: The filter includes a filter cartridge (100) and a filtration mechanism disposed therein. The filter cartridge (100) is also provided with a backwash cleaning assembly. The backwash cleaning assembly includes a drain pipe (200) disposed in the middle of the filtration mechanism. The drain end of the drain pipe (200) passes through the outer arc surface of the filter cartridge (100) and extends to the outside. The inlet end of the drain pipe (200) is rotatably connected to the bottom of the filter cartridge (100) by a rotating pipe (201). The inlet end of the rotating pipe (201) is configured to cooperate with the filtration mechanism. A valve (202) is provided at the drain end of the drain pipe (200). Multiple support plates (203) are provided at the edge of the filtration mechanism. A rotating frame (204) is rotatably connected to the middle of each support plate (203). A spiral scraper (205) is provided on the outside of each rotating frame (204). The spiral scraper (205) is configured to cooperate with the filtration mechanism.

2. The backwash filter as described in claim 1, characterized in that: The backwash cleaning assembly also includes a motor (206) located at the bottom of the filter cartridge (100), the output shaft of which is fixedly connected to the rotating tube (201).

3. The backwash filter as described in claim 1, characterized in that: It also includes a drive assembly, which includes a fixed cylinder (300) disposed in the rotating tube (201), a sliding rod (301) slidably connected to the upper end of the fixed cylinder (300), a crown tooth (302) rotatably connected to the upper end of the sliding rod (301), and a crown tooth (303) provided at the lower end of the rotating frame (204), and the crown tooth (303) is movably engaged with the crown tooth (302).

4. The backwash filter as described in claim 3, characterized in that: The drive assembly also includes a second motor (304) disposed on the upper end of the sliding rod (301), and the output shaft of the second motor (304) is fixedly connected to the first crown tooth (302).

5. The backwash filter as described in claim 3, characterized in that: The drive assembly also includes an electric telescopic rod (305) disposed at the bottom of the fixed cylinder (300), the telescopic end of the electric telescopic rod (305) being fixedly connected to the lower end of the sliding rod (301).

6. The backwash filter as described in claim 1, characterized in that: The pressure measuring port on the outer arc surface of the filter cartridge (100) is equipped with a differential pressure sensor (400).

7. The backwash filter as described in claim 1, characterized in that: The filtration mechanism includes a base plate (500) disposed at the lower end of the inner cavity of the filter cylinder (100), the drain pipe (200) is fixedly installed in the fixing hole in the middle of the base plate (500), the edge of the base plate (500) is provided with multiple mounting holes, the cylindrical filter screens (501) are respectively disposed between the mounting holes and the filter cylinder (100), the filter cylinder (100) is provided with locking holes that cooperate with each cylindrical filter screen (501), the multiple mounting holes are all configured to cooperate with the liquid inlet end of the rotating pipe (201), the support plate (203) is fixedly installed at the lower end of the inner cavity of the mounting hole, and the spiral scraper (205) respectively contacts the inner arc surface of the cylindrical filter screen (501) adjacent on the same side.

Images