CN220159368U - Self-cleaning filter - Google Patents

Abstract

The utility model discloses a self-cleaning filter, which comprises a first shell, a first cylindrical filter screen, a dirt sucking component and a driving piece, wherein the first shell is provided with a first cylindrical filter screen; the cavity in the first shell is divided into a filter chamber and a dirt collecting chamber, and the first cylindrical filter screen is arranged in the filter chamber; the dirt absorbing component is arranged in the dirt collecting chamber and extends into the first cylindrical filter screen, and the dirt absorbing component is used for absorbing dirt of the first cylindrical filter screen; the driving piece is arranged on the first shell and is used for pressing the dirt sucking component when the filter filters; the dirt absorbing assembly is provided with a first magnetic part, the driving part is provided with a second magnetic part, the first magnetic part and the second magnetic part are oppositely arranged, and magnetic poles opposite to each other repel each other, so that the driving part can apply force to the dirt absorbing assembly through magnetic repulsive force. The dirt sucking component is not directly connected with the driving piece while vibration is reduced, durability and stability are better, and the problem of part abrasion is avoided.

Description

Self-cleaning filter

Technical Field

The utility model relates to the technical field of water treatment, in particular to a self-cleaning filter.

Background

The filter is used in the technical field of water treatment and is often applied to treatment of domestic water, irrigation water and the like. The filter utilizes the filter screen to intercept and filter impurities in water, remove particles, impurities and the like in the water, purify the water quality and ensure that the water quality reaches the standard.

The self-cleaning filter can be automatically cleaned when the filter needs to be cleaned, and the filter does not need to be manually disassembled for cleaning. The current self-cleaning filter vibrates greatly in the process of self-cleaning, so the vibration is reduced by arranging an elastic mechanism to be respectively connected with a driving piece and a self-cleaning dirt absorbing component. However, the elastic mechanism is easy to be damaged by fatigue or lose elasticity after long service time, and has poor durability and stability.

Disclosure of Invention

The utility model aims to provide a self-cleaning filter which is better in durability and stability while absorbing shock.

The utility model discloses a self-cleaning filter, which comprises a first shell, a first cylindrical filter screen, a dirt sucking component and a driving piece, wherein the first shell is provided with a first cylindrical filter screen; the cavity in the shell is divided into a filtering chamber and a dirt collecting chamber, and a cylindrical filter screen is arranged in the filtering chamber; the dirt absorbing component is arranged in the dirt collecting chamber and extends into a cylindrical filter screen, and the dirt absorbing component is used for absorbing dirt of the cylindrical filter screen; the driving piece is arranged on the first shell and is used for pressing the dirt sucking component when the filter filters;

the dirt absorbing assembly is provided with a first magnetic part, the driving part is provided with a second magnetic part, the first magnetic part and the second magnetic part are oppositely arranged, and magnetic poles opposite to each other repel each other, so that the driving part can apply force to the dirt absorbing assembly through magnetic repulsive force.

Optionally, one of the first magnetic member and the second magnetic member has a cross section larger than that of the other.

Optionally, the cross-section of the second magnetic member is larger than the cross-section of the first magnetic member, or the cross-section of the first magnetic member is larger than the cross-section of the second magnetic member.

Optionally, the first magnetic member and the second magnetic member are magnets or permanent magnets.

Optionally, the first magnetic element and the second magnetic element are electromagnets; or (b)

One of the first magnetic member and the second magnetic member is a magnet or a permanent magnet, and the other is an electromagnet.

Optionally, the dirt pickup assembly includes a dirt collection tube and a hydraulic motor; the dirt collecting pipe is arranged in the first cylindrical filter screen, the hydraulic motor is arranged in the dirt collecting chamber, and the dirt collecting pipe is communicated with the hydraulic motor.

Optionally, the first magnetic member is mounted on top of the hydro-motor.

Optionally, the driving member comprises a driving rod extending into the dirt collection chamber; the second magnetic piece is arranged on one end of the driving rod facing the dirt sucking assembly.

Optionally, a dirt cleaning suction nozzle is arranged on the dirt collecting pipe.

Optionally, the driving piece is an air cylinder, and the driving piece further comprises a cylinder barrel and a piston; the cylinder barrel is arranged on a shell, and two ends of the cylinder barrel are provided with extension ports; the driving rod is inserted into the cavity of the cylinder barrel, and the piston is positioned in the cavity of the cylinder barrel and sleeved on the driving rod; one end of the driving rod passes through the extending port and extends into the dirt collecting chamber, and the other end extends out of the other extending port.

Optionally, the self-cleaning filter further comprises a loose joint by which the cylinder is detachably mounted on a housing.

According to the self-cleaning filter, the first magnetic part is arranged on the dirt absorbing assembly, the second magnetic part is arranged on the driving part, the repulsive magnetic force is utilized to generate acting force, the acting force of the driving part is transmitted to the dirt absorbing assembly, the problem that the elastic mechanism is directly connected and is easy to lose elasticity and damage after long-time use is avoided, the dirt absorbing assembly is not directly connected with the driving part while vibration is reduced, the durability and the stability are better, and the problem of part abrasion is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the figures in the following description are only some embodiments of the utility model, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:

FIG. 1 is a schematic illustration of a self-cleaning filter according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a schematic view of a driving member according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a screen base according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a filtration system according to an embodiment of the present utility model;

fig. 6 is a partial enlarged view of a portion a in fig. 2.

Fig. 7 is a schematic diagram of the first magnetic member and the second magnetic member according to an embodiment of the present utility model.

1, a self-cleaning filter; 11. a first housing; 111. a partition plate; 112. an upper case; 112a, a dirt collection chamber; 112b, a sewage outlet; 113. a lower case; 113a, a filter chamber; 113b, a first water inlet; 113c, a first water outlet; 113d, mounting slots; 12. a first cylindrical filter screen; 121. a filter screen base; 121a, a central axis; 121b, an inner connecting portion; 121c, water through holes; 13. a soil pick-up assembly; 131. a dirt collecting pipe; 131a, a dirt cleaning suction nozzle; 132. a hydraulic motor; 132a, a dirt spraying port; 133. a metal tube; 134. a first magnetic member; 14. a driving member; 141. a driving rod; 142. a cylinder; 142a, an extension port; 142b, upper liquid inlet; 142c, lower liquid inlet; 143. a piston; 144. a second magnetic member; 16. a loose joint; 17. a sewage discharge joint; 171. a water inlet diaphragm valve; 172. a blowdown diaphragm valve; 173. an exhaust valve; 174. a vacuum breaking mechanism; 18. a filtering device; 19. a controller; 20. a pipeline flow-limiting device.

Detailed Description

It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the utility model may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

The utility model is described in detail below with reference to the attached drawings and alternative embodiments.

As shown in fig. 1, 2 and 6, as an embodiment of the present utility model, a self-cleaning filter 1 is disclosed, comprising a first housing 11, a first cylindrical screen 12, a dirt pickup assembly 13 and a driver 14; a chamber in the housing 11 is partitioned into a filtering chamber 113a and a dirt collecting chamber 112a, and a cylindrical filter 12 is installed in the filtering chamber 113 a; the dirt absorbing component 13 is arranged in the dirt collecting chamber 112a and extends into a cylindrical filter screen 12, and the dirt absorbing component 13 is used for absorbing dirt of the cylindrical filter screen 12; a driving member 14 is mounted on the first housing 11, the driving member 14 being used to press the dirt pickup assembly 13 when the filter is filtering; the dirt sucking assembly 13 is provided with a first magnetic part 134, the driving part 14 is provided with a second magnetic part 144, the first magnetic part 134 and the second magnetic part 144 are oppositely arranged, and magnetic poles opposite to each other of the first magnetic part 134 and the second magnetic part 144 repel each other, so that the driving part 14 can apply force to the dirt sucking assembly 13 through magnetic repulsive force.

According to the self-cleaning filter 11 disclosed by the utility model, the first magnetic piece 134 is arranged on the dirt absorbing component 13, the second magnetic piece 144 is arranged on the driving piece 14, and the force applied by the driving piece 14 is transmitted to the dirt absorbing component 13 by utilizing magnetic repulsion, so that the problems that the elastic mechanism is directly connected and worn, the elasticity and the damage are easy to lose after long-time use are avoided, the dirt absorbing component 13 is not directly connected with the driving piece 14 while vibration is reduced, the durability and the stability are better, and the part wear problem is avoided.

For the specific implementation of the first magnetic element 134 and the second magnetic element 144, in an embodiment, the first magnetic element 134 and the second magnetic element 144 are magnets or permanent magnets, which has simple structure and design and low cost. In another embodiment, the first magnetic member 134 and the second magnetic member 144 are electromagnets, and the magnetic force is easy to adjust and control, so as to facilitate operation and control. In another embodiment, one of the first magnetic member 134 and the second magnetic member 144 is a magnet or a permanent magnet, and the other is an electromagnet. For example, the first magnetic member 134 is a magnet or a permanent magnet, and the second magnetic member 144 is an electromagnet; alternatively, the second magnetic member 144 may be a magnet or a permanent magnet, and the first magnetic member 134 may be an electromagnet.

Alternatively, as shown in fig. 6 and 7, one of the first magnetic member 134 and the second magnetic member 144 has a cross section larger than that of the other. In this scheme, the cross section of one of them is great, can guarantee that first magnetic part 134 and second magnetic part 144 magnetic field are just right, improves the stability of magnetic force looks repulsion. If the cross sections of the two are as large as each other, when the two are staggered in the use process, the repulsive force of the magnetic force is deflected rather than being in the vertical direction, so that the acting force between the two is deflected, and the force application effect is reduced. Preferably, as shown in fig. 7, the cross-section of the second magnetic member 144 is larger than the cross-section of the first magnetic member 134. In this scheme, the first magnetic member 134 with a larger cross section is arranged on the relatively stable driving member 14, and the driving member 14 only performs the up-down driving movement, so that the movement is simple, the shaking is small, the alignment of the second magnetic member 144 and the magnetic field of the first magnetic member 134 is facilitated, and the stability of the magnetic force repulsive force is improved. Specifically, the second magnetic member 144 is disposed on an end of the driving rod 141 facing the soil pick-up assembly 13. In another embodiment, as shown in FIG. 6, the cross-section of the first magnetic member 134 is larger than the cross-section of the second magnetic member 144.

Specifically, a partition 111 is disposed in the first housing 11, and the partition 111 divides the cavity in the first housing 11 into a filter chamber 113a and a dirt collecting chamber 112a; one end of the first shell 11 is provided with a first water inlet 113b communicated with the filtering chamber 113a, and the side surface is provided with a first water outlet 113c communicated with the filtering chamber 113a and a sewage outlet 112b communicated with the sewage collecting chamber 112a; one end of the first cylindrical filter screen 12 is fixed on the partition 111, and the other end is in butt joint with the first water inlet 113 b; the dirt pickup assembly 13 extends into the first cylindrical screen 12 through the partition 111; the sewage suction assembly 13 discharges sewage into the sewage collection chamber 112a and out through the sewage discharge outlet 112 b.

Specifically, when the self-cleaning filter 1 of the utility model is used for filtering, sewage to be filtered enters from the first water inlet 113b and directly flows into the first cylindrical filter screen 12, impurities in the sewage are trapped after the sewage passes through the first cylindrical filter screen 12, the filtered water flows out from the first water outlet 113c, a filtering mode from inside to outside is realized, impurities in the sewage are remained in the first cylindrical filter screen 12 and cannot float to other areas of the self-cleaning filter, the self-cleaning filter is convenient to clean, and other parts of the self-cleaning filter are not easy to be polluted and damaged for a long time. In the filter state, the driving member 14 presses the dirt pickup assembly 13, and the dirt pickup assembly 13 is in an initial position, as shown in fig. 2. At the time of self-cleaning, the dirt sucking assembly 13 sucks dirt of the first cylindrical filter screen 12 and discharges the dirt into the dirt collecting chamber 112a through the dirt discharge outlet 112 b.

Optionally, the soil pick-up assembly 13 comprises a soil collecting tube 131 and a hydraulic motor 132; the sewage collecting pipe 131 is arranged in the first cylindrical filter screen 12, the hydraulic motor 132 is arranged in the sewage collecting chamber 112a, and the sewage collecting pipe 131 is communicated with the hydraulic motor 132; the sewage collecting pipe 131 is provided with a sewage cleaning suction nozzle 131a, and the hydraulic motor 132 is provided with a sewage spraying port 132a; a first magnetic member 134 is mounted on top of the hydraulic motor 132. In this scheme, the sewage collecting pipe 131 is inserted in the first cylindrical filter screen 12, when self-cleaning is performed, the first water inlet 113b is filled with water, the first water outlet 113c is closed, meanwhile, the sewage outlet 112b is opened, the original water in the sewage collecting chamber 112a flows out from the sewage outlet 112b, the sewage collecting chamber 112a and the filter chamber 113a form a pressure difference, meanwhile, under the action of the water inlet pressure of the first water inlet 113b, the water in the filter chamber 113a is sucked into the sewage collecting pipe 131 through the sewage cleaning suction nozzle 131a, flows into the hydraulic motor 132 and is sprayed into the sewage collecting chamber 112a through the sewage spraying port 132a, and finally is discharged from the sewage outlet 112 b. In this process, the dirt removing suction nozzle 131a sucks away dirt, particles, etc. trapped on the first cylindrical filter screen 12, thereby achieving the purpose of cleaning, and the cleaning process does not require additional power, and the dirt removing is completed purely by pressure difference and water pressure. During the cleaning process, the driving member 14 does not press the hydraulic motor 132, so that the dirt collecting tube 131 ascends under the action of the water pressure, the dirt cleaning nozzle 131a can move upwards, and the suction position is replaced, so that the second cylindrical filter screen 22 is ensured to be cleaned.

Optionally, the driving member includes a driving rod 141 extending into the dirt collection chamber 112a; the second magnetic member 144 is disposed on an end of the driving rod 141 facing the soil pick-up assembly 13.

Specifically, the cleaning nozzles 131a may be disposed in plurality along the axial direction of the dirt collecting tube 131, to ensure the cleaning effect. The dirt cleaning nozzle 131a may be as close to the second cylindrical filter 22 as possible, and dirt, particulate matter, etc. trapped on the first cylindrical filter 12 may be more easily sucked away.

Optionally, the driving member 14 is a cylinder, and the driving member 14 further includes a cylinder tube 142 and a piston 143; the cylinder 142 is arranged on the first shell 11, and two ends of the cylinder 142 are provided with extension ports 142a; the driving rod 141 is inserted into the cavity of the cylinder 142, and the piston 143 is positioned in the cavity of the cylinder 142 and sleeved on the driving rod 141; one end of the driving rod 141 protrudes into the dirt collection chamber 112a through the protruding port 142a, and the other end protrudes from the other protruding port 142 a. In this scheme, one end of the driving rod 141 passes through the extension port 142a to extend into the dirt collecting chamber 112a, and the other end extends out of the other extension port 142a, when the filter is performed, the dirt collecting tube 131 rises to drive the hydraulic motor 132 to rise to push the driving rod 141 upwards, and finally the other end of the driving rod 141 gradually extends out of the other extension port 142a, so that an operator can judge the self-cleaning process through the length of the extension of the driving rod 141 out of the cylinder 142, and the self-cleaning filter is convenient and simple.

Specifically, a seal ring is provided at the projecting port 142a to ensure tightness in the cylinder tube 142. More specifically, the driving member 14 is a hydraulic cylinder, and the cylinder tube 142 is provided with an upper liquid inlet 142b and a lower liquid inlet 142c. When the driving member 14 is to press the dirt pickup assembly 13 during filtering, the upper liquid inlet 142b is hydraulically charged, and the driving rod 141 is extended downward to press the hydraulic motor 132. During self-cleaning, the upper inlet 142b removes the hydraulic pressure, and the sewage collecting pipe 131 can be lifted.

Optionally, the self-cleaning filter 1 further includes a loose joint 16, and the cylinder 142 is detachably mounted on the first housing 11 through the loose joint 16, so as to facilitate the disassembly, assembly and replacement of the driving member 14. Specifically, the loose-joint 16 is a standard.

Optionally, at least two of the sewage spraying ports face the side wall of the sewage collecting chamber, and at least two of the sewage spraying ports face different directions; the diameter of the dirt spraying opening is 10-25mm. In this scheme, at least two of them spouts dirty mouthful opening orientation difference, spouts dirty mouthful diameter and is 10-25mm, when self-cleaning, spouts dirty mouthful 132a and spouts sewage simultaneously and produce the driving force, and hydraulic motor 132 rotates, and then drives album dirt pipe 131 and rotates, and the suction nozzle 131a rotates together, thereby changes the suction position on the horizontal direction, and the washing of first tube-shape filter screen 12 is more comprehensive. Thus, in the self-cleaning process, the dirt collecting pipe 131 can ascend and rotate, the first cylindrical filter screen 12 is more comprehensively cleaned, and the cleaning effect is better.

Alternatively, the first housing 11 includes an upper case 112 and a lower case 113, a sump chamber 112a is formed in the upper case 112, and a filter chamber 113a is formed in the lower case 113. The upper case 112 and the lower case 113 are coupled by any one of a yoke, a loose joint flange, or a screw loose joint. In this scheme, the upper shell 112 and the lower shell 113 are connected through any one of a clamp, a loose joint flange or a screw loose joint, so that the installation direction can be freely adjusted, and the installation is convenient. Specifically, the first water inlet 113b is formed at an end of the lower case 113, the first water outlet 113c is formed at a side of the lower case 113, the sewage outlet 112b is formed at a side of the upper case 112, and the driving part 14 is installed at a top of the upper case 112.

Alternatively, the first cylindrical screen 12 includes a screen base 121, the screen base 121 being installed at the first water inlet 113 b; the filter screen base 121 is provided with a central shaft 121a, and the dirt collecting pipe 131 is inserted on the central shaft 121 a. In this scheme, dirt collecting tube 131 inserts on axis 121a, can play spacing dirt collecting tube 131 effect, dirt collecting tube 131 installation and removal are stable. The first cylindrical filter 12 is installed at the first water inlet 113b through the filter base 121, so that the first cylindrical filter 12 can be firmly installed.

Optionally, the filter screen base 121 is hollowed out, and an inner connecting part 121b is arranged in the hollowed out part, and at least two water through holes 121c are formed in the inner connecting part 121b at intervals; the sum of the areas of all the water through holes 121c is larger than the area of the inner connecting portion 121 b. In this embodiment, the sum of the areas of all the water through holes 121c is larger than the area of the inner connecting portion 121b, so that the blocking of the filter screen base 121 is small, and the water inlet effect of the first water inlet 113b is ensured. Specifically, the center shaft 121a is inserted in the center of the connection portion and is fixed by a nut.

Specifically, the self-cleaning filter 1 further comprises a drain fitting 17, a filter device 18, and a controller 19. The drain connector 17 is mounted on the drain outlet 112b and communicates with the dirt collection chamber 112a, and a water inlet diaphragm valve 171, a drain diaphragm valve 172 and an exhaust valve 173 are provided on the drain connector. The water outlet end of the filtering device 1 is connected with the water inlet diaphragm valve 171 and the upper liquid inlet 142b of the cylinder 142, so that the dirt collecting chamber 112a is filled with water when the self-cleaning filter 1 filters, and the driving rod 141 is pressed down by hydraulic driving to press the hydraulic motor 132. The drain connector 17 is also provided with a vacuum breaking mechanism 174, and the vacuum breaking mechanism 174 can be a vacuum breaking valve, so that the pressure in the drain connector 17 is ensured to be normal. The exhaust valve 173 is used for exhaust. The filter 18 may filter the water passing into the sump 112a and the cylinder 142. A solenoid valve can be arranged on a pipeline of the filtering device 18, and the controller 19 controls the solenoid valve to be opened and closed.

Optionally, the dirt absorbing assembly 13 further includes a metal tube 133, and the partition 111 and the dirt collecting tube 131 are made of plastic materials; the metal pipe 133 is disposed through the partition 111, and the sewage collecting pipe 131 communicates with the hydro motor 132 through the metal pipe 133. When the collecting pipe 131 moves, friction may be generated between the metal pipe 133 and the partition 111. In this scheme, baffle 111 is the plastics material, and tubular metal resonator 133 passes baffle 111 and sets up, and plastics and metal contact friction, baffle 111 and metal are difficult to take place wearing and tearing.

Alternatively, the inner wall surface of the lower case 113 near one end of the upper case 112 is provided with a mounting groove 113d, the partition 111 is mounted in the mounting groove 113d, and the upper case 112 catches the edge of the partition 111. The partition board 111 is clamped by the cooperation of the mounting groove 113d and the upper shell 112, so that the partition board 111 is easy to assemble and disassemble and good in fixing effect.

Optionally, the self-cleaning filter 1 further includes a water outlet flange 23, and the water outlet flange 23 can be detachably mounted on the first water outlet 113c with a changeable mounting angle, so as to facilitate adjustment of the mounting angle. Specifically, the outlet flange 23 may be detachably mounted on the first outlet 113c by changing a mounting angle through a clip, a loose joint flange, or a screw loose joint.

Optionally, a water intake is formed on the sewage joint 17 or the upper shell 112; the water inlet end of the filter device 18 is connected with a water intake. The sewage joint 17 or the sewage collecting chamber 112a of the upper shell 112 is relatively tight with the water in the filtering chamber 113a, so that the water entering the filtering device 18 is taken from the sewage collecting chamber, and the filtering burden of the filtering device 18 is reduced.

Optionally, an upper liquid inlet 142b is formed on the cylinder 142, and the upper liquid inlet 142b is communicated with the water outlet end of the filtering device 18; the self-cleaning filter 1 further comprises a pipe restrictor 24; the conduit restrictor 24 is mounted on the upper inlet 142b, on the water outlet end of the filter 18, or on a conduit between the upper inlet 142b and the water outlet end of the filter 18. The conduit restrictor 24 may control the intake of water. Specifically, the pipe flow restrictor 24 may be a solenoid valve, and the pipe flow restrictor 24 is controlled to operate by the controller 19.

Optionally, the upper shell 112 is made of plastic, and an exhaust valve 173 is disposed on the upper shell 112. The exhaust valve 173 can exhaust air to prevent explosion due to excessive air pressure inside the upper case 112. In another embodiment, or, the upper shell 112 is made of plastic, the self-cleaning filter 1 further comprises a drain connector 17, the drain connector 17 is installed on the drain outlet 112b and is communicated with the sewage collecting chamber 112a, an exhaust valve 173 is arranged on the drain connector 17, and the exhaust valve 173 can exhaust air to prevent explosion caused by excessive air pressure in the upper shell 112.

For ease of understanding, the complete process of self-cleaning filter 1 filtration and self-cleaning of the present utility model is: during filtration, sewage to be filtered enters from the first water inlet 113b and directly flows into the first cylindrical filter screen 12, impurities in the sewage are trapped after the sewage passes through the first cylindrical filter screen 12, and filtered water flows out from the first water outlet 113c, so that the inside-out filtration is realized. In the filtering state, the filtering device 18 introduces the filtered water into the sewage joint 17 through the water inlet diaphragm valve 171, and into the cylinder 142 through the upper liquid inlet 142b, the sewage joint 17 and the sewage collecting chamber 112a are filled with water, and the driving rod 141 extends into the sewage collecting chamber 112a under the driving of the water pressure, and the hydraulic motor 132 is pressed by the magnetic repulsion between the first magnetic member 134 and the second magnetic member 144. Since the first water outlet 113c is normally circulated, the sewage entering through the first water inlet 113b will flow out from the first water outlet 113c after being filtered, and will not be pressed into the sewage suction nozzle 131 a. When self-cleaning is needed, the first water inlet 113b still keeps water, the first water outlet 113c is closed, the controller 19 controls the filter device 18 to stop water from entering the upper liquid inlet 142b, the hydraulic pressure of the driving piece 14 is removed, the sewage discharge diaphragm valve 172 is opened, water in the sewage collection chamber 112a is discharged from the sewage discharge diaphragm valve 172, the pressure difference is formed between the sewage collection chamber 112a and the filter chamber 113a, meanwhile, under the action of the water entering pressure of the first water inlet 113b, the water in the filter chamber 113a is sucked into the sewage collection pipe 131 by the sewage cleaning suction nozzle 131a, and then is sprayed into the sewage collection chamber 112a from the sewage spraying port 132a, and finally is discharged through the sewage discharge diaphragm valve 172. In this process, since the hydraulic motor 132 is not pressed by the driving member 14 by the magnetic repulsive force, and is under the combined action of the pressure difference of the dirt collecting chamber 112a and the water pressure in the filtering chamber 113a, and the thrust force of the two dirt spraying ports, the dirt collecting pipe 131 rotates while ascending, and the dirt cleaning nozzle 131a completely sucks the dirt on the first cylindrical filter screen 12. When the hydraulic motor 132 rises to the highest position, the self-cleaning is completed, and the hydraulic water is pressed in the cylinder 142 again through the upper liquid inlet 142b, so that the driving rod 141 is driven to downwards press and reset the hydraulic motor 132 and the dirt collecting pipe 131 through magnetic repulsive force, and the self-cleaning filter 1 can be normally filtered again.

The above description of the utility model in connection with specific alternative embodiments is further detailed and it is not intended that the utility model be limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. The self-cleaning filter is characterized by comprising a first shell, a first cylindrical filter screen, a dirt sucking assembly and a driving piece; the cavity in the first shell is divided into a filtering chamber and a dirt collecting chamber, and the first cylindrical filter screen is arranged in the filtering chamber; the dirt absorbing component is arranged in the dirt collecting chamber and extends into the first cylindrical filter screen, and the dirt absorbing component is used for absorbing dirt of the first cylindrical filter screen; the driving piece is arranged on the first shell and is used for pressing the dirt sucking assembly when the filter filters;

the dirt absorbing assembly is characterized in that a first magnetic part is arranged on the dirt absorbing assembly, a second magnetic part is arranged on the driving part, the first magnetic part and the second magnetic part are oppositely arranged, and magnetic poles opposite to each other of the first magnetic part and the second magnetic part repel each other, so that the driving part can apply force to the dirt absorbing assembly through magnetic repulsive force.

2. The self-cleaning filter of claim 1, wherein one of the first magnetic member and the second magnetic member has a cross-section that is greater than a cross-section of the other.

3. The self-cleaning filter of claim 2, wherein the cross-section of the second magnetic member is greater than the cross-section of the first magnetic member or the cross-section of the first magnetic member is greater than the cross-section of the second magnetic member.

4. The self-cleaning filter of claim 1, wherein the first magnetic member and the second magnetic member are magnets or permanent magnets.

5. The self-cleaning filter of claim 1, wherein the first magnetic member and the second magnetic member are electromagnets; or (b)

One of the first magnetic member and the second magnetic member is a magnet or a permanent magnet, and the other is an electromagnet.

6. A self-cleaning filter as recited in any one of claims 1-5, wherein the dirt pickup assembly includes a dirt collection tube and a hydraulic motor; the sewage collecting pipe is arranged in the first cylindrical filter screen, the hydraulic motor is arranged in the sewage collecting chamber, and the sewage collecting pipe is communicated with the hydraulic motor.

7. The self-cleaning filter as recited in claim 6, wherein the first magnetic member is mounted on top of the hydro-motor.

8. A self-cleaning filter as recited in any one of claims 1-5, wherein said drive member includes a drive rod, said drive rod extending into said dirt collection chamber; the second magnetic piece is arranged on one end of the driving rod, which faces the dirt sucking assembly.

9. The self-cleaning filter of claim 8, wherein the driver is a cylinder, the driver further comprising a cylinder and a piston; the cylinder barrel is arranged on the first shell, and two ends of the cylinder barrel are provided with extension ports; the driving rod is inserted into the cavity of the cylinder barrel, and the piston is positioned in the cavity of the cylinder barrel and sleeved on the driving rod; one end of the driving rod penetrates through the extending opening to extend into the dirt collecting chamber, and the other end of the driving rod extends out of the other extending opening.

10. The self-cleaning filter of claim 9, further comprising a loose-fitting, wherein the cylinder is removably mounted to the first housing by the loose-fitting.