Self-cleaning water treatment device

Abstract

The invention relates to the technical field of water treatment, in particular to a self-cleaning water treatment device which comprises a treatment pipeline, a plurality of transverse shafts are fixed to the inner wall of the treatment pipeline in parallel at equal intervals in the axial direction, carrier rollers are coaxially and rotationally connected to the transverse shafts, electrode assemblies are installed on the carrier rollers, and each electrode assembly comprises at least one pair of cathode units and anode units which are alternately arranged. The cathode unit comprises a cathode strip externally wrapped with a cathode rubber sleeve, the anode unit comprises an anode strip externally wrapped with an anode rubber sleeve, and the cathode strip and the anode strip are both of a conductive steel wire rope structure; the surfaces of the cathode rubber sleeve and the anode rubber sleeve are respectively provided with array type notches which are distributed at equal intervals along the axial direction, the electrode assembly extends into the treatment pipeline in a continuous wave-shaped path, and the wave crest and wave trough sections of the electrode assembly are respectively wound on the surfaces of the adjacent carrier rollers to form sine wave type winding distribution. Scale on the cathode can be quickly and conveniently cleaned away, an acid solution does not need to be added, meanwhile, scale removal is easy and convenient, shutdown operation is not needed, and scale removal operation is automatically achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a self-cleaning water treatment device. Background Art

[0002] The operation process of the circulating cooling water system is to let the heated cold water flow through the cooling equipment, cool it down through the cooling water, and then use the pump to send it back to the production equipment for use again. However, the water itself contains many tiny particles that need to be filtered. During the water circulation process, a series of problems often occur, which in turn affects the normal operation of the cooling water system.

[0003] For example, scale-forming ions such as Ca2+ and Mg2+ in water will migrate to the cathode area under the action of electrostatic attraction, and then generate and precipitate CaCO3, MgCO3, Ca(OH)2, Mg(OH)2 and other precipitates, and finally form scale on the cathode. Therefore, it is necessary to clean the cathode regularly.

[0004] At present, there are two common ways to descale the cathode. One is to add an acid solution to the circulating water so that the scale reacts with the acid solution and is peeled off. However, this method has obvious disadvantages. The acid solution will not only corrode the cathode and shorten the service life of the cathode, but the residual acid solution will also affect the effect of subsequent water treatment and even corrode the pipeline. Another way is that some companies use hanging plates to scrape off the cathode scale. However, this method requires shutdown operation, which will inevitably cause wear on the cathode surface, and because the scaling of the cathode material is not all flat, some of them have many holes, making it difficult to completely scrape off the scale. In addition, this method requires a large amount of labor and is inefficient, which seriously affects production efficiency.

[0005] In addition, traditional electrochemical water treatment devices are large in size and occupy a large area, and are not flexible enough during installation. Existing electrochemical water treatment devices also have shortcomings. The distance between the cathode and the anode is usually far and not fixed, which leads to poor and unstable ionization effect, and ultimately greatly reduces the water treatment effect. Summary of the invention

[0006] In order to solve the defects of the prior art, the present invention provides a self-cleaning water treatment device, which does not require the addition of acid solution, has a simple and convenient descaling process, does not require shutdown, can automatically complete the descaling operation, and has high descaling efficiency. It can be cleverly integrated with the treatment pipeline, greatly saves floor space, is flexible and changeable in installation, and has good and stable ionization effect.

[0007] The technical solution adopted by the present invention is: comprising a processing pipeline, a plurality of transverse axes are fixed on the inner wall of the processing pipeline in parallel and equidistant along the axial direction, rollers are coaxially connected to the transverse axes, and electrode assemblies are installed on the rollers;

[0008] The electrode assembly comprises at least one pair of cathode units and anode units arranged alternately;

[0009] The cathode unit includes a cathode bar wrapped with a cathode rubber sleeve, and the anode unit includes an anode bar wrapped with an anode rubber sleeve. Both the cathode bar and the anode bar are conductive steel wire rope structures.

[0010] The surfaces of the cathode rubber sleeve and the anode rubber sleeve are respectively provided with array-type notches equidistantly distributed along the axial direction, and the positions and sizes of the notches on the cathode rubber sleeve and the anode rubber sleeve correspond to each other, so that the cathode strips and the anode strips of the corresponding sections form a partially exposed ionization contact area;

[0011] A plurality of rubber rods are transversely connected between the cathode rubber sleeve and the anode rubber sleeve, and the rubber rods are fixed at intervals between adjacent notches;

[0012] The electrode assembly extends in the processing pipeline in a continuous wavy path, and its wave crests and troughs are respectively wound around the surfaces of adjacent rollers to form a sinusoidal winding distribution.

[0013] Working principle:

[0014] When working, the power supply is connected in the following way: the cathode strip is connected to the negative pole of the power supply, and the anode strip is connected to the positive pole of the power supply. The left end of the treatment pipeline is used as the water inlet end, and the right end is used as the water outlet end. In the water, scaling ions such as Ca2+ and Mg2+ will move toward the cathode strip under the influence of electrostatic attraction. In this process, precipitates such as CaCO3, MgCO3, Ca(OH)2, and Mg(OH)2 will be generated and precipitated, and then scale will form on the cathode strip. The scaling position is at the gap of the cathode rubber sleeve, which causes the ionization effect of the cathode strip to deteriorate and the scaling ions are difficult to precipitate. The equipment can only consume electrical energy, but cannot precipitate the precipitate, and the circulating water cannot be effectively treated. In the long run, it is very easy to cause scaling of the cooling system pipe wall, thereby affecting the heat exchange efficiency.

[0015] For the above situation, it is only necessary to pull the electrode assembly. As the contact position between the electrode assembly and the roller changes, the bending position of the electrode assembly will also change accordingly. Among them, the cathode rubber sleeve and the anode rubber sleeve are soft and flexible, and the cathode strips and the anode strips are made of steel wire rope, which can not only ensure good conductivity but also bend at will. The scale is solid and cannot be deformed with the bending of the steel wire rope. Therefore, when the electrode assembly is bent, the scale will break and fall off, and then be washed by the water flow to the water outlet of the treatment pipeline for collection and treatment. In this way, the scale on the cathode can be removed quickly and conveniently, and the cathode can be quickly descaled without disassembling the equipment or stopping the equipment.

[0016] In addition, the water treatment device is directly integrated with the treatment pipeline, which allows for greater freedom and flexibility in installation, while taking up less space. Moreover, the distance between the cathode and anode strips remains constant, which effectively ensures a good and stable ionization effect.

[0017] Furthermore, a collection bucket is connected and fixed below the water outlet of the treatment pipeline, and slide rails are arranged on the inner walls on both sides of the collection bucket. A movable filter assembly is arranged in the collection bucket, and the filter assembly includes:

[0018] A movable frame, both ends of which are slidably engaged on the slide rails;

[0019] The filter screen is fixed in the mobile frame and completely covers the outlet end of the treatment pipeline;

[0020] The horizontal plate is arranged at the front end of the moving frame and is embedded with a magnet.

[0021] After the scale is broken, it will flow with the water to the outlet of the straight pipe, where it will be intercepted by the filter and then fall into the collection bucket.

[0022] Preferably, a vertical cylinder is provided above the collection barrel, the lower end of the vertical cylinder is fixedly connected to the processing pipeline and is located above the mobile frame, a mounting frame is provided in the processing pipeline, a scraper is fixed on the mounting frame and the inner wall of the vertical cylinder, the blade of the scraper faces the filtering surface of the filter screen, and the blade of the scraper contacts the surface of the filter screen. The upper end of the vertical cylinder is sealed by an elastic membrane, a traction plate is fixed on the lower surface of the elastic membrane, and the traction plate is connected to the top of the mobile frame by a thin rope.

[0023] The tiny particles that need to be filtered in the water will reach the water outlet with the water flow. After being intercepted by the filter, these particles gradually adhere to the net, causing the filter to be blocked. When the filter is blocked, the water flow cannot pass through, and the water inlet end of the treatment pipe continues to flow in, which makes the water pressure in the treatment pipe continue to increase. Under the action of water pressure, the elastic membrane bulges upward, and the thin rope connected to the elastic membrane pulls the mobile frame to move upward synchronously. At this time, the scraper fixed on the mobile frame can scrape off the scale debris attached to the filter net and make it fall into the collection bucket below. After the scraper cleans, the filter net restores its ability to pass water flow, and the water pressure in the treatment pipe returns to normal. After the water pressure is lost, the elastic membrane is reset, and the mobile frame also returns to its initial position under the action of elasticity. The whole process does not require manual intervention, realizes the automatic cleaning of the filter net, and significantly improves the water treatment efficiency.

[0024] Preferably, a pulley is provided in the collection barrel, the pulley height is lower than the bottom of the mobile frame, a pull rope is fixed at the bottom of the mobile frame, the pull rope passes through the pulley and is fixedly connected to the tail end of the electrode assembly. A torsion spring is sleeved on the horizontal axis, the inner end of the torsion spring is fixed to the horizontal axis, and the outer end is connected to the roller.

[0025] When the mobile frame moves upward, it will drive the tail end of the electrode assembly downward, thereby affecting the entire electrode assembly, and the scale on the cathode strip can be automatically cleaned without frequent manual operations, greatly improving the processing efficiency. After the water pressure returns to normal, the mobile frame will move downward and return to its initial position. At this time, the pull rope is no longer under tension, and the electrode assembly also returns to its original position under the elastic force generated by the torsion spring.

[0026] Preferably, an auxiliary cleaning component is provided at the rear of the movable frame, and the auxiliary cleaning component comprises:

[0027] A guide barrel is fixed in the processing pipeline by means of a column and its axis is tilted backward;

[0028] The cylindrical iron block is slidably arranged in the guide barrel.

[0029] In the initial state, the magnet and the cylindrical iron block are attracted through the filter screen. When the mobile frame moves upward, the magnet moves away from the cylindrical iron block, the cylindrical iron block and the magnet are disengaged, and the cylindrical iron block slides to the bottom of the guide barrel along the inclined guide cylinder. When the frame moves downward, the magnet attracts the cylindrical iron block again, and the cylindrical iron block quickly moves toward the magnet and hits the filter screen, shaking off the micro-chips that block the filter holes, making the filter screen clean more thoroughly. During the above work, the water inlet end of the treatment pipeline can be temporarily closed to prevent the water flow from washing the micro-chips onto the filter screen again.

[0030] Preferably, the roller is wide at both ends and narrow in the middle, and its tapered end face cooperates with the curved surface of the electrode assembly to prevent the electrode assembly from detaching. Flexible bristles are vertically arranged on the roller surface, and the length of the bristles extends to contact the surface of the electrode assembly. The bristles can clean the scale attached to the cathode strip during the movement of the electrode assembly, making the cleaning more thorough.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. By setting up a bendable electrode assembly, it can be bent arbitrarily while ensuring conductivity. The scale is solid and cannot bend with the wire rope, so the scale will break and fall, and be washed to the water outlet of the straight pipe by the water flow, and the scale will be collected and processed at the water outlet. In this way, the scale on the cathode can be cleaned quickly and conveniently without adding acid solution. At the same time, the descaling is simple and convenient, and the descaling operation can be automatically realized without stopping the machine.

[0033] 2. The water treatment device is directly integrated into the treatment pipeline, which allows for greater freedom during installation and occupies a smaller area.

[0034] 3. Fixed inter-electrode spacing ensures the stability of the ionization field. Through this electromechanical synergy mechanism, it can effectively prevent scaling of the treatment device tube wall and significantly improve the continuous working efficiency of the electrode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 It is a schematic diagram of the internal structure of the processing pipeline in the present invention;

[0037] Figure 2 To process the top view of the internal structure of the pipeline

[0038] Figure 3 It is a schematic diagram of the motor assembly structure;

[0039] Figure 4 It is a diagram showing the internal structure of the connection between the processing pipeline, the collection bucket and the vertical cylinder;

[0040] Figure 5 It is a front view of the internal structure of the connection between the processing pipeline, the collection bucket and the vertical cylinder;

[0041] Figure 6 for Figure 5 Schematic diagram of the cross section at AA in the middle.

[0042] In the figure: 1. processing pipeline; 2. horizontal axis; 3. roller; 4. electrode assembly; 41. cathode rubber sleeve; 42. cathode strip; 43. anode rubber sleeve; 44. anode strip; 45. rubber rod; 5. collecting bucket; 6. slide rail; 71. mobile frame; 72. filter screen; 73. horizontal plate; 74. magnet; 8. vertical cylinder; 9. mounting frame; 10. scraper; 11. elastic membrane; 12. traction plate; 13. thin rope; 14. pulley; 15. pull rope; 16. torsion spring; 171. guide barrel; 172. column; 173. cylindrical iron block; 18. bristles. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] like Figure 1-Figure 6 As shown, a self-cleaning water treatment device comprises a treatment pipeline 1, on the inner wall of the treatment pipeline 1 are fixed a plurality of transverse shafts 2 parallel to and equidistant from the axial direction, on the transverse shafts 2 are coaxially connected and rotatably connected rollers 3, on the rollers 3 are mounted electrode assemblies 4;

[0045] The electrode assembly 4 comprises at least one pair of cathode units and anode units arranged alternately;

[0046] The cathode unit includes a cathode strip 42 wrapped with a cathode rubber sleeve 41, and the anode unit includes an anode strip 44 wrapped with an anode rubber sleeve 43. Both the cathode strip 42 and the anode strip 44 are conductive steel wire rope structures.

[0047] The surfaces of the cathode rubber sleeve 41 and the anode rubber sleeve 43 are respectively provided with array-type notches equidistantly distributed along the axial direction, and the positions and sizes of the notches on the cathode rubber sleeve 41 and the anode rubber sleeve 43 correspond to each other, so that the cathode strips 42 and the anode strips 44 of the corresponding sections form a partially exposed ionization contact area;

[0048] A plurality of rubber rods 45 are transversely connected between the cathode rubber sleeve 41 and the anode rubber sleeve 43, and the rubber rods 45 are fixed at intervals between adjacent notches;

[0049] The electrode assembly 4 extends in the processing pipeline 1 in a continuous wavy path, and its wave crests and troughs are respectively wound around the surfaces of adjacent rollers 3 to form a sinusoidal winding distribution.

[0050] Working principle:

[0051] When working, the power supply is connected in the following way: the cathode strip 42 is connected to the negative pole of the power supply, and the anode strip 44 is connected to the positive pole of the power supply. The left end of the treatment pipeline 1 serves as the water inlet end, and the right end serves as the water outlet end. In the water, scaling ions such as Ca2+ and Mg2+ will move toward the cathode strip 42 under the influence of electrostatic attraction. In this process, precipitates such as CaCO3, MgCO3, Ca(OH)2, and Mg(OH)2 will be generated and precipitated, and then scale will be formed on the cathode strip 42. The scaling position is at the gap of the cathode rubber sleeve 41, which causes the ionization effect of the cathode strip 42 to deteriorate, and scaling ions are difficult to precipitate. The equipment can only consume electrical energy, but cannot precipitate the precipitate, and the circulating water cannot be effectively treated, which can easily lead to scaling of the cooling system pipe wall, thereby affecting the heat exchange efficiency.

[0052] For the above situation, it is only necessary to pull the electrode assembly 4. As the contact position between the electrode assembly 4 and the roller 3 changes, the bending position of the electrode assembly 4 will also change accordingly. Among them, the cathode rubber sleeve 41 and the anode rubber sleeve 43 are soft and flexible, and the cathode strip 42 and the anode strip 44 are made of steel wire rope, which can not only ensure good conductivity but also bend at will. The scale is solid and cannot be deformed with the bending of the steel wire rope. Therefore, when the electrode assembly 4 is bent, the scale will break and fall off, and then be washed by the water flow to the water outlet of the treatment pipe 1 for collection and treatment. In this way, the scale on the cathode can be quickly and conveniently removed, and the cathode can be quickly descaled without disassembling the equipment or stopping the equipment.

[0053] In addition, the water treatment device is directly integrated with the treatment pipeline 1, which allows for a higher degree of freedom and more flexible installation during installation, while taking up less space. Moreover, the distance between the cathode strip 42 and the anode strip 44 remains constant, and this design effectively ensures a good and stable ionization effect.

[0054] The water outlet of the treatment pipeline 1 is connected to and fixed with a collection bucket 5 below, and slide rails 6 are arranged on the inner walls of both sides of the collection bucket 5. A movable filter assembly is arranged in the collection bucket 5, and the filter assembly includes:

[0055] The movable frame 71 has two ends slidably engaged on the slide rail 6;

[0056] The filter screen 72 is fixed in the mobile frame 71 and completely covers the outlet end of the treatment pipe 1;

[0057] The horizontal plate 73 is disposed at the front end of the movable frame 71 and is embedded with a magnet 74 .

[0058] After the scale is broken, it will flow with the water to the outlet of the straight pipe, where it will be intercepted by the filter 72 and then fall into the collection bucket 5.

[0059] A vertical cylinder 8 is provided above the collection barrel 5, the lower end of which is fixedly connected to the processing pipeline 1 and is located above the mobile frame 71. A mounting frame 9 is provided in the processing pipeline 1. A scraper 10 is fixed on the mounting frame 9 and on the inner wall of the vertical cylinder 8. The blade of the scraper 10 faces the filtering surface of the filter screen 72, and the blade of the scraper 10 contacts the surface of the filter screen 72. The upper end of the vertical cylinder 8 is sealed by an elastic membrane 11, and a traction plate 12 is fixed to the lower surface of the elastic membrane 11. The traction plate 12 is connected to the top of the mobile frame 71 through a thin rope 13.

[0060] The tiny particles that need to be filtered in the water will reach the water outlet with the water flow. After being intercepted by the filter 72, these particles gradually adhere to the net, causing the filter 72 to be blocked. When the filter 72 is blocked, the water flow cannot pass through, and the water inlet end of the treatment pipe 1 continues to flow in, which makes the water pressure in the treatment pipe 1 continue to increase. Under the action of water pressure, the elastic membrane 11 bulges upward, and the thin rope 13 connected to the elastic membrane 11 pulls the mobile frame 71 to move upward synchronously. At this time, the scraper 10 fixed on the mobile frame 71 can scrape off the scale debris attached to the filter 72 and make it fall into the collection bucket 5 below. After cleaning by the scraper 10, the filter 72 restores its ability to pass water flow, and the water pressure in the treatment pipe 1 returns to normal. After losing the water pressure, the elastic membrane 11 is reset, and the mobile frame 71 also returns to the initial position under the action of elasticity. The whole process does not require manual intervention, realizes the automatic cleaning of the filter 72, and significantly improves the water treatment efficiency.

[0061] A pulley 14 is provided in the collecting barrel 5, and the height of the pulley 14 is lower than the bottom of the moving frame 71. A pull rope 15 is fixed to the bottom of the moving frame 71, and the pull rope 15 passes over the pulley 14 and is fixedly connected to the tail end of the electrode assembly 4. A torsion spring 16 is sleeved on the horizontal axis 2, and the inner end of the torsion spring 16 is fixed to the horizontal axis 2, and the outer end is connected to the roller 3.

[0062] When the moving frame 71 moves upward, it drives the tail end of the electrode assembly 4 to move downward, thereby moving the entire electrode assembly 4, and the scale on the cathode strip 42 can be automatically cleaned without frequent manual operations, which greatly improves the processing efficiency. After the water pressure returns to normal, the moving frame 71 will move downward and return to the initial position. At this time, the pull rope 15 is no longer under tension, and the electrode assembly 4 is also restored to its original position under the elastic force generated by the torsion spring 16.

[0063] Among them, an auxiliary cleaning component is arranged behind the mobile frame 71, and the auxiliary cleaning component includes:

[0064] The guide barrel 171 is fixed in the processing pipeline 1 through the column 172 and its axis is tilted backward;

[0065] The cylindrical iron block 173 is slidably disposed in the guide barrel 171 .

[0066] In the initial state, the magnet 74 and the cylindrical iron block 173 are attracted to each other through the filter screen 72. When the movable frame 71 moves upward, the magnet 74 moves away from the cylindrical iron block 173, and the cylindrical iron block 173 and the magnet 74 are disengaged, and the cylindrical iron block 173 slides to the bottom of the guide barrel 171 along the inclined guide cylinder. When the frame moves downward, the magnet 74 attracts the cylindrical iron block 173 again, and the cylindrical iron block 173 quickly moves toward the magnet 74 and hits the filter screen 72, brushing off the micro-chips that block the filter holes, so that the filter screen 72 can be cleaned more thoroughly. During the above work, the water inlet end of the processing pipeline 1 can be temporarily closed to prevent the water flow from washing the micro-chips onto the filter screen 72 again.

[0067] The roller 3 is wide at both ends and narrow in the middle, and its tapered end face cooperates with the curved surface of the electrode assembly 4 to prevent the electrode assembly 4 from detaching. Flexible bristles 18 are vertically arranged on the roller surface, and the length of the bristles 18 extends to contact the surface of the electrode assembly 4. The bristles 18 can clean the scale attached to the cathode strip 42 during the movement of the electrode assembly 4, making the cleaning more thorough.

Claims

1. A self-cleaning water treatment device, comprising a treatment pipeline (1), characterized in that: A plurality of transverse axes (2) are fixed on the inner wall of the processing pipeline (1) in parallel and equidistantly along the axial direction, and rollers (3) are coaxially rotatably connected to the transverse axes (2), and electrode assemblies (4) are mounted on the rollers (3); The electrode assembly (4) comprises at least one pair of cathode units and anode units arranged alternately; The cathode unit comprises a cathode strip (42) wrapped with a cathode rubber sleeve (41), and the anode unit comprises an anode strip (44) wrapped with an anode rubber sleeve (43), and both the cathode strip (42) and the anode strip (44) are conductive steel wire rope structures; The surfaces of the cathode rubber sleeve (41) and the anode rubber sleeve (43) are respectively provided with array-type notches equidistantly distributed along the axial direction, and the positions and sizes of the notches on the cathode rubber sleeve (41) and the anode rubber sleeve (43) correspond to each other, so that the cathode strips (42) and the anode strips (44) of the corresponding sections form a partially exposed ionization contact area; A plurality of rubber rods (45) are transversely connected between the cathode rubber sleeve (41) and the anode rubber sleeve (43), and the rubber rods (45) are fixed at intervals between adjacent notches; The electrode assembly (4) extends in a continuous wavy path within the processing pipeline (1), and its wave crests and troughs are respectively wound around the surfaces of adjacent rollers (3) to form a sinusoidal winding distribution.

2. A self-cleaning water treatment device according to claim 1, characterized in that: A collection bucket (5) is connected to and fixed below the water outlet end of the treatment pipeline (1), and slide rails (6) are arranged on the inner walls of both sides of the collection bucket (5). A movable filter assembly is arranged in the collection bucket (5), and the filter assembly comprises: A movable frame (71), both ends of which are slidably engaged on the slide rail (6); A filter screen (72) is fixed in the movable frame (71) and completely covers the water outlet end of the treatment pipe (1); The horizontal plate (73) is arranged at the front end of the movable frame (71) and is embedded with a magnet (74).

3. A self-cleaning water treatment device according to claim 2, characterized in that: A vertical cylinder (8) is provided above the collection barrel (5); the lower end of the vertical cylinder (8) is fixedly connected to the processing pipeline (1) and is located above the movable frame (71); a mounting frame (9) is provided in the processing pipeline (1); a scraper (10) is fixed on the mounting frame (9) and on the inner wall of the vertical cylinder (8); the blade of the scraper (10) faces the filtering surface of the filter screen (72), and the blade of the scraper (10) contacts the surface of the filter screen (72).

4. A self-cleaning water treatment device according to claim 3, characterized in that: The upper end of the vertical cylinder (8) is sealed by an elastic membrane (11), a traction plate (12) is fixed to the lower surface of the elastic membrane (11), and the traction plate (12) is connected to the top of the moving frame (71) by a thin rope (13).

5. A self-cleaning water treatment device according to claim 2, characterized in that: A pulley (14) is arranged in the collection bucket (5), the height of the pulley (14) is lower than the bottom of the mobile frame (71), a pull rope (15) is fixed to the bottom of the mobile frame (71), the pull rope (15) passes around the pulley (14) and is fixedly connected to the tail end of the electrode assembly (4), and a torsion spring (16) is sleeved on the transverse axis (2), the inner end of the torsion spring (16) is fixed to the transverse axis (2), and the outer end is connected to the roller (3).

6. A self-cleaning water treatment device according to claim 2, characterized in that: An auxiliary cleaning component is arranged at the rear of the movable frame (71), and the auxiliary cleaning component comprises: The guide barrel (171) is fixed in the processing pipeline (1) through a column (172) and its axis is tilted backward; The cylindrical iron block (173) is slidably disposed in the guide barrel (171).

7. A self-cleaning water treatment device according to claim 1, characterized in that: The roller (3) is wide at both ends and narrow in the middle, and its tapered end surface matches the curved surface of the electrode assembly (4). Flexible bristles (18) are vertically arranged on the roller surface, and the length of the bristles (18) extends to contact the surface of the electrode assembly (4).

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