CN219231626U - Filtering device - Google Patents

Abstract

The utility model relates to the technical field of filtration, and particularly discloses a filtering device which comprises a supporting main body, a liquid inlet component, a filtering component and a cleaning component, wherein the liquid inlet component is provided with a liquid guide port, the filtering component comprises a filter screen and a plurality of transmission parts erected on the supporting main body, the filter screen is in an annular belt shape and movably wound on the transmission parts, one section of the filter screen along the winding direction of the filter screen is positioned below the liquid guide port, and the other section of the filter screen along the winding direction of the filter screen stretches into the cleaning component. This filter equipment has realized the circulation and the self-cleaning of filter screen, replaces artifical handling process, need not to shut down, has promoted efficiency. In addition, the filter screen can be recycled after being cleaned, so that the service life of the filter screen is prolonged, the cost is saved, and the filtering and energy consumption are balanced.

Description

Filtering device

Technical Field

The utility model relates to the technical field of filtration, in particular to a filtering device.

Background

Polishing is a commonly used procedure in the preparation of various devices. Taking a lens/touch screen of a mobile phone/watch as an example, most of the lenses/touch screens are in a 3D structure. Because the lens/touch screen is mostly made of glass or sapphire with higher hardness, polishing materials (such as pig hair/sisal hemp/leather polishing discs and the like) are needed to be used for polishing. In the polishing process, the polishing material is deformed by applying pressure to the polishing material so as to fully contact the 3D surface of the product, and the polishing powder is driven to rub the product surface to realize polishing.

Because the polishing material needs to have soft texture, the strength and toughness are generally poor, and phenomena such as hair falling, abrasion, breakage and the like are easy to occur in the processing process. These worn polishing materials can fall into the polishing liquid and be mixed into the polishing liquid, so that the polishing liquid pipeline is easily blocked and polluted, and the polishing effect is affected. In the actual production process, a single-layer filter bag is usually used for filtering at the grinding fluid recovery position, and due to single mesh, the problems of unsmooth filtering and overflow of the grinding fluid are easy to occur, the problems of mesh bag bursting and the like are also likely to occur, and the machine is often required to stop for cleaning the mesh bag, so that the processing efficiency is affected.

In summary, how to effectively solve the problems of the filter bag, such as easy occurrence of unsmooth filtration, is a problem that needs to be solved by those skilled in the art at present.

Disclosure of Invention

In view of the above, the present utility model is directed to a filtering device, which can effectively solve the problem that the conventional filtering structure is prone to have poor filtering.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a filter equipment, includes support main part, filter component, washing subassembly and feed liquor subassembly, the feed liquor subassembly has the drain, the filter component include the filter screen, erect in a plurality of driving medium on the support main part, the filter screen is annular banding and movably around locating on the driving medium, the filter screen is located along its one section of around establishing the direction the drain below, the filter screen stretches into along its another section around establishing the direction the washing subassembly.

Optionally, in the above filtering device, the filtering component includes one or more groups, and the filter screen of each group of filtering component is sequentially and alternately arranged with the cleaning component as a center.

Optionally, in the filtering device, a slag receiving groove is formed in the inner side of the filter screen.

Optionally, in the filtering device, two edges of the filter screen are concave towards the middle of the filter screen.

Optionally, the filtering device further includes a liquid level detecting device, which is disposed on the support body and near the bottom of the filter screen.

Optionally, in the above filtering device, the transmission member includes a transmission shaft and a transmission wheel disposed on the transmission shaft, and the filtering assembly further includes a driving assembly, where the driving assembly includes:

the transmission guide wheels are arranged on the transmission shaft;

the transmission belt is tensioned on each transmission guide wheel;

the first driving piece is in driving connection with one of the transmission guide wheels.

Optionally, in the above filtering device, the filtering assembly further includes:

the sliding block is slidably arranged on the supporting main body, and at least one transmission piece is connected with the sliding block;

the second driving piece is arranged on the supporting main body and is in driving connection with the sliding block.

Optionally, in the above filtering device, the cleaning assembly includes a cleaning tank, at least one driving member is located in the cleaning tank, and the rest of the driving members are disposed around the periphery of the cleaning tank.

Optionally, in the above filtering device, the cleaning assembly further includes an ultrasonic generator disposed in the cleaning tank.

Optionally, in the above filtering device, a coarse filter is disposed between the filter screen and the liquid guiding port.

Optionally, in the filtering device, each group of filtering components comprises: an auxiliary wheel is attached to the bottom of the filter screen at the liquid guide port, and the auxiliary wheel is arranged on the support main body.

Optionally, in the above filtering device, the liquid inlet assembly includes a liquid inlet tank, a flow guiding pipe communicated with the liquid inlet tank, and at least one liquid inlet port, and the liquid guiding port is an outlet of the flow guiding pipe.

Optionally, the filtering device further includes:

the liquid collecting box is arranged below the filter screen;

and the liquid pump is arranged in the liquid collecting box.

By using the filtering device provided by the utility model, the liquid to be filtered is fed above one end of the filter screen through the liquid guide port of the liquid inlet assembly, so that the liquid is filtered by the filter screen in the falling process. When the filter screen is used for a period of time to form a certain degree of blockage and needs to be cleaned, the position of the filter screen needing to be cleaned is conveyed to the cleaning assembly through rotating the filter screen, the filter screen is cleaned, and correspondingly, the filter screen which is cleaned is conveyed to the liquid guide port to play a filtering role, so that the circulation is realized. Therefore, the filter device can realize the circulation and automatic cleaning of the filter screen, replaces the manual treatment process, does not need to stop, and improves the efficiency. In addition, the filter screen can be recycled after being cleaned, so that the service life of the filter screen is prolonged, the cost is saved, and the filtering and energy consumption are balanced. Moreover, when the filtering device is applied to different scenes, namely, different to-be-filtered liquids are filtered, the filtering screens with different specifications can be conveniently replaced, so that the filtering device is suitable for filtering cooling liquid or other liquids of other devices such as CNC/cutting and the like.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a filtering device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the other view of FIG. 1;

FIG. 3 is a schematic rear view of the device of FIG. 1;

FIG. 4 is a schematic structural view of a filter screen;

FIG. 5 is a schematic cross-sectional view of FIG. 4;

fig. 6 is a schematic view of the cyclic filtration of the filter screen.

The figures are marked as follows:

the device comprises a supporting main body 1, a filtering assembly 2, a cleaning assembly 3, a liquid inlet assembly 4, a liquid level detection device 5, a liquid collecting tank 6, a liquid pump 7, a coarse filter 8, a slag receiving tank 9 and a controller 10;

a support table 11;

the device comprises a filter screen 21, a transmission piece 22, a driving assembly 23, a sliding block 24, a second driving piece 25, a guide rail 26, an auxiliary wheel 27, a liquid storage tank 211, a transmission shaft 221, a transmission wheel 222, a tension adjusting transmission piece 22-1, a transmission guide wheel 231, a transmission belt 232 and a first driving piece 233;

a cleaning tank 31, an ultrasonic generator 32;

a liquid guide port 41, a liquid inlet box 42, a flow guide pipe 43 and a liquid inlet port 44;

the direction of rotation of the filter screen is shown by the dashed arrow in fig. 6, and the direction of flow of the liquid to be filtered is shown by the solid arrow.

Detailed Description

The embodiment of the utility model discloses a filtering device for realizing the recycling and automatic cleaning of a filter screen.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The filtering device provided by the application is applicable to, but not limited to, filtering polishing grinding fluid, and can also be used for other liquids needing to be filtered, such as sewage, etc., namely the liquid to be filtered includes, but is not limited to, the grinding fluid. For convenience of explanation, the following will take an example in which the filtering device is used for the grinding fluid.

Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a filtering device according to an embodiment of the utility model; FIG. 2 is a schematic view of the other view of FIG. 1; fig. 3 is a schematic rear view corresponding to fig. 1.

In one embodiment, the utility model provides a filter device comprising a support body 1, a filter assembly 2, a cleaning assembly 3 and a liquid inlet assembly 4. The supporting main body 1 is a main body bearing device and is used for installing all parts of the filtering device. The filter assembly 2 comprises a filter screen 21 and a transmission member 22. The filter screen 21 is in a ring-shaped belt shape and is movably wound on the transmission member 22; the transmission members 22 are provided in plurality and respectively erected on the support body 1, and tension the filter screen 21. The feed assembly 4 has a feed port 41 for introducing liquid to be filtered into the filter assembly 3. A section of the filter screen 21 along the winding direction thereof is located below the liquid guide port 41 to filter the liquid to be filtered. The filter screen 21 extends into the cleaning assembly 3 along the other section of the winding direction, and the cleaning assembly 3 is used for cleaning the filter screen 31. It will be appreciated that the annular filter 21 is partially filtered during use and partially cleaned.

By using the filtering device provided by the utility model, the liquid to be filtered is fed above one end of the filter screen 21 through the liquid guide port 41 of the liquid inlet assembly 4, so that the liquid is filtered by the filter screen 21 in the falling process. When the filter screen 21 is used for a period of time and a certain degree of blockage is formed on the filter screen 21 to be cleaned, the position of the filter screen 21 to be cleaned is transmitted to the cleaning assembly 3 by rotating the filter screen 21, the filter screen 21 is cleaned, and accordingly, the filter screen 21 which is cleaned is transmitted to the liquid guide port 41 to play a filtering role, and the circulation is performed. It can be seen that this filter equipment can realize the circulation and the self-cleaning of filter screen 21, replaces artifical handling process, need not to shut down, has promoted efficiency. In addition, the filter screen 21 can be recycled after being cleaned, so that the service life of the filter screen 21 is prolonged, the cost is saved, and the filtering and energy consumption are balanced. Furthermore, when the filtering device is applied to different scenes, i.e. for filtering different liquids to be filtered, the filtering screen 21 with different specifications can be conveniently replaced, so that the filtering device is suitable for filtering cooling liquid or other liquids of other devices such as CNC/cutting and the like.

In one embodiment, the path of the filter screen 21 is controlled by the transmission member 22 such that a section of the filter screen 21 located at the upper part extends into the cleaning assembly 3 and a section located at the lower part is located below the liquid guiding port 41 for filtering the liquid to be filtered. I.e. the filter screen 31 is arranged in a vertically circulating manner. I.e. the ring-shaped filter net 31, can be used for filtering when being driven to the lower part during the circulation driving process, and can be used for cleaning when being driven to the upper part and extending into the cleaning assembly 3. The arrangement is convenient for the space layout of each component, and the liquid to be filtered naturally falls down by gravity after being filtered by the filter screen 21, so that the interference to the cleaning of the filter screen 21 is avoided. In other embodiments, the filter screen 31 may be disposed in a horizontal circulation manner, that is, a section of the filter screen 21 in the horizontal direction (for example, a section on the left side) extends into the cleaning assembly 3, and another section of the filter screen in the horizontal direction (for example, a section on the right side) is located below the liquid guiding port 41, so as to be used for filtering the liquid to be filtered.

In one embodiment, the filtering device comprises one or more groups of filtering components 2, and the filter screens 21 of the filtering components 2 of each group are sequentially arranged at intervals outwards around the cleaning component 3. I.e. the filter screens 21 of the filter assemblies 2 of each group are sleeved in sequence. The cleaning assembly 3 is arranged at the center of the filter screen 21 at the innermost ring. By arranging a plurality of groups of filter assemblies 2, the structure of each group of filter assemblies 2 can refer to the embodiments, a plurality of filter screens 21 can meet more precise liquid filtration, and the pore diameters of the filter screens 21 can be the same or different, for example, the pore diameters of the filter screens 21 corresponding to the inner ring and the outer ring are gradually reduced, so that the multi-stage filtration from thick to thin is formed. In other embodiments, the filter devices may be arranged in a group as desired.

In one embodiment, referring to fig. 4-5, both edges of filter 21 are concave toward the middle of filter 21. Compared with the planar filter screen, the two edges of the filter screen 21 are recessed towards the middle of the filter screen 21 to form the liquid storage tank 311 so as to store more liquid to be filtered, and the liquid to be filtered is not easy to overflow. For better transmission, the transmission member 22 adopts a structure matched with the filter screen 21, and the transmission member is wrapped by two edges of the filter screen 21 so as to improve the stability of the transmission of the filter screen 21.

In one embodiment, the driving member 22 includes a driving shaft 221 and a driving wheel 222 provided on the driving shaft 221. The transmission shaft 221 is rotatably arranged on the support body 1, and the transmission wheel 222 is fixed on the transmission shaft 221 and is used for tensioning the filter screen 21. The transmission piece 22 is characterized by a simple structure and reliable transmission. Specifically, the transmission shaft 221 may be connected to the support body 1 through bolts and bearings. In other embodiments, the driving member 22 may also be a sprocket, and the corresponding filter 21 is provided with a structure capable of matching with the sprocket.

In one embodiment, filter assembly 2 further comprises a drive assembly 23, drive assembly 23 comprising a drive pulley 231, a drive belt 232, and a first drive member 233. The plurality of driving guide wheels 231 are respectively arranged on the driving shafts 221, and the plurality of driving guide wheels 231 can be correspondingly arranged with at least part of the driving shafts 221, and the driving guide wheels 231 and the corresponding driving shafts 221 can be respectively arranged at two opposite sides of the supporting main body 1 and are respectively and fixedly connected; the transmission belt 232 is tensioned on each transmission guide pulley 231; the first driving member 233 is drivingly connected to one of the plurality of driving pulleys 231 to drive the corresponding driving pulley 231 to rotate. A plurality of transmission members 22 are arranged corresponding to one filter screen 21, transmission guide wheels 231 are arranged corresponding to at least part of the transmission members 22 in the plurality of transmission members 22, one of the transmission guide wheels 231 is connected with the output end of the first driving member 233 to serve as a driving wheel to drive the transmission belt 232 to move, and other transmission guide wheels 231 serve as driven wheels. Each driving guide wheel 231 is connected with the driving shaft 221 respectively, so as to drive the driving shaft 221 to rotate, and the driving shaft 221 drives the driving wheel 222 thereon to rotate, thereby realizing stable driving of the filter screen 21. With the above arrangement, the first driving member 233 and the filter screen 21 can be provided on both sides of the support body 1, thereby preventing the liquid on the filter screen 21 from affecting the first driving member 233. To facilitate the installation of the first driving member 233, a support table 11 may be provided on the support body 1, and the first driving member 233 is provided on the support table 11.

In one embodiment, in each set of filter assemblies 2: an auxiliary wheel 27 is attached to the bottom of the filter screen 21 at the liquid guide port 41, and the auxiliary wheel 27 is arranged on the support main 1. By the provision of the auxiliary wheel 27, the filter section of the filter screen 21 can be supported. The auxiliary wheel 27 can be connected to the support body 1 in a rotatable manner by means of bolts and bearings.

In one embodiment, the filter assembly 2 further comprises a slider 24 and a second driver 25. The sliding block 24 is correspondingly arranged with the filter screen 21, the sliding block 24 is slidably arranged on the support main body 1, and at least one transmission piece 22 is connected with the sliding block 24. For convenience of description, the transmission member 22 disposed on the slider 24 is referred to as a tension adjustment transmission member 22-1, the second driving member 25 is disposed corresponding to the slider 24, the second driving member 25 is disposed on the support body 1, and an output end of the second driving member 25 is connected to the slider 24 to drive the slider 24 to move. The second driving member 25 drives the slider 24 to slide along the support body 1 so as to drive the tension adjusting transmission member 22-1 on the slider 24 to move, thereby adjusting the tension degree of the filter screen 21. During assembly, the tension adjusting transmission members 22-1 are moved in a direction of loosening the filter screen 21, so that the filter screen 21 is conveniently mounted on each transmission member 22, and then the tension adjusting transmission members 22-1 are moved reversely, so that the filter screen 21 is tensioned. With the above arrangement, the filter screen 21 is easily detached. The second driving member 25 may be a motor, and an output end of the motor is connected to the slider 24 through a screw, and the slider 24 serves as a nut to slide along the support body 1. The second driving member 25 may be a telescopic cylinder such as an air cylinder or a hydraulic cylinder.

Further, the filter assembly 2 further comprises a guide rail 26 provided on the support body 1, and the slider 24 is slidably connected to the guide rail 26, so that it can move along the guide rail 26 under the driving of the motor. In other embodiments, the second driving member 25 may also be a telescopic cylinder, the piston rod of which is connected to the slider 24 to drive the slider 24 to slide along the support body 1. In other embodiments, the filter assembly 2 may also include a slider 24 and a locking member, where the slider 24 is slidably disposed on the support body 1 and locked at different positions along the sliding stroke by the locking member, and the slider 24 is provided with a tension adjusting transmission member 22-1. The locking component may specifically be a bolt, where the supporting body 1 is provided with a bar hole, and the bolt penetrates through the bar hole and can lock the slider 24 at different positions along the bar hole.

In one embodiment, the cleaning assembly 3 includes a cleaning tank 31, at least one transmission member 22 is located within the cleaning tank 31, and the remaining transmission members 22 are disposed around the periphery of the cleaning tank 31. The cleaning tank 31 is used for containing cleaning liquid. The transmission member 22 positioned in the cleaning tank 31 enables the corresponding section of the filter screen 21 to be positioned in the cleaning tank 31. When the filter screen 21 is used for a period of time and a certain degree of blockage is formed on the filter screen 21 and needs to be cleaned, the filter screen 21 is rotated, the position of the filter screen 21 which needs to be cleaned is conveyed into the cleaning tank 31, and the cleaning liquid of the cleaning tank 31 can effectively clean the filter screen 21.

Further, the cleaning assembly 3 includes an ultrasonic generator 32 provided in the cleaning tank 31. The filter screen 21 is cleaned by ultrasonic vibration, and the cleaning effect is good. The top end of the supporting main body 1 can be provided with a controller 10, and the controller 10 is connected with the ultrasonic generator through an ultrasonic control wire. In other embodiments, the cleaning assembly 3 may also include a roller brush or a rinse head, or the like.

In one embodiment, the filter device further comprises a coarse filter 8 provided on the support body 1, the coarse filter 8 being provided between the filter screen 21 and the liquid guiding port 41. The specific coarse filter 8 is located below the liquid guiding port 41 and above the filter screen 21, so that the liquid to be filtered is filtered by the filter screen 21 below after passing through the coarse filter 8. In the case of providing a plurality of filter assemblies 2, the coarse filter 8 is disposed at the center of the filter screen 21 at the innermost ring and below the liquid guide port 41, so that the liquid to be filtered is filtered through each filter screen 21 below after passing through the coarse filter 8. By the arrangement of the coarse filter 8, a multistage filtration is formed, further improving the filtration effect. Specifically, the coarse filter 8 reserves a drain hole for filtering large-scale impurities. The coarse filter 8 can adopt an open structure, so that impurities can be cleaned without stopping, and the machine efficiency is improved.

In one embodiment, the filtering device further comprises a liquid level detecting device 5 provided on the supporting body 1, wherein the liquid level detecting device 5 is near the bottom of the filter screen 21 and is used for detecting the height of the liquid stored on the filter screen 21. When the height of the stored liquid reaches a preset value, the driving assembly 23 can be started to drive the filter screen 21 to move, or the filter screen 21 can be manually rotated, so that the energy consumption is controlled while the liquid to be filtered is not overflowed, the circulating start and stop of the filter screen are controlled by sensing the liquid storage amount on the filter screen 21, and the filtration and the energy consumption are balanced. The liquid level detecting device 5 may specifically adopt a liquid level height limiting switch, and when the stored liquid reaches the starting height of the liquid level height limiting switch, the liquid level height limiting switch acts, and the driving assembly 23 is started. In summary, by the above arrangement, automatic start and stop of the conveyance of the filter screen 21 can be realized. In other embodiments, the filter screen 21 may be controlled to always circulate at a certain speed during use.

In one embodiment, the liquid inlet assembly 4 includes a liquid inlet tank 42, a flow guide tube 43 in communication with the liquid inlet tank 42, and at least one liquid inlet port 44, the liquid guide port 41 being an outlet of the flow guide tube 43. By providing the liquid inlet tank 42 and the plurality of liquid inlet ports 44, liquid to be filtered of a plurality of devices can be conveniently accessed to supply the filtering requirements of the plurality of devices. The flow guide pipe 43 is used for guiding the liquid to be filtered collected in the liquid inlet tank 42 to the filter assembly 2, and the length of the flow guide pipe 43 can be set correspondingly according to the position of the liquid inlet tank 42 and the position of the filter assembly 2. In other embodiments, the liquid inlet assembly 4 may also only include a liquid inlet pipe, and the outlet of the liquid inlet pipe is the liquid guiding port 41, so that the liquid to be filtered is directly led into the filter assembly 2.

In one embodiment, the filter device further comprises a header tank 6 and a liquid pump 7. The header tank 6 is disposed below the filter screen 21 to receive the filtrate filtered by the filter screen 21. The liquid pump 7 is arranged on the liquid collecting box 6 and is used for pumping filtered filtrate to corresponding working equipment so as to realize the recycling of the filtrate. The header tank 6 may be provided with a plurality of liquid pumps 7 as required to supply filtered liquid to a plurality of working devices. Taking the filtering device for filtering the grinding fluid as an example, the grinding fluid for polishing is guided into the filtering component 2 through the fluid inlet component 4, returns to the fluid collecting box 6 after passing through the filtering action of a plurality of filter screens 21, is conveyed back to the polishing equipment for internal reference and polishing through the fluid pump 7, and returns to the fluid inlet component 4 after polishing, so that a complete cycle is formed.

In one embodiment, the filtering device further comprises a slag receiving groove 9 which is attached to the filtering net 21 and is used for receiving slag on the filtering net 21, wherein the slag receiving groove 9 is fixed on the supporting main body 1 and is positioned right below the top part of the filtering net 21, and is preferably positioned close to the left part of the filtering net 21. As shown in fig. 6, the filter screen 21 rotates clockwise, and when the portion having the impurities filtered therein rotates above the slag receiving tank 9, the heavier impurities drop into the slag receiving tank 9 and then rotate into the cleaning assembly 3 for cleaning.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. The utility model provides a filter equipment, its characterized in that, including support main part (1), filter component (2), washing subassembly (3) and feed liquor subassembly (4), feed liquor subassembly (4) have drain mouth (41), filter component (2) include filter screen (21), erect in a plurality of driving medium (22) on support main part (1), filter screen (21) are annular banding and movably around locating on driving medium (22), one section of filter screen (21) along its around establishing the direction is located drain mouth (41) below, another section of filter screen (21) along its around establishing the direction stretches into wash subassembly (3).

2. The filtering device according to claim 1, wherein the filtering assembly (2) comprises one or more groups, and the filter screens (21) of the filtering assemblies (2) of each group are sequentially arranged at intervals outwards around the cleaning assembly (3).

3. The filtering device according to claim 1, characterized in that the inside of the filter screen (21) is provided with a slag receiving trough (9).

4. The filtering device according to claim 1, characterized in that both edges of the filter screen (21) are concave towards the middle of the filter screen (21).

5. The filtering device according to claim 1, further comprising a liquid level detection device (5) provided on the support body (1) and close to the bottom of the filtering screen (21).

6. The filtering device according to claim 1, wherein the transmission member (22) comprises a transmission shaft (221) and a transmission wheel (222) provided on the transmission shaft (221), the filtering assembly (2) further comprises a driving assembly (23), the driving assembly (23) comprising:

a plurality of transmission guide wheels (231) arranged on the transmission shaft (221);

a transmission belt (232) which is tensioned on each transmission guide wheel (231);

and the first driving piece (233) is in driving connection with one of the plurality of transmission guide wheels (231).

7. The filtering device according to claim 6, wherein the filtering assembly (2) further comprises:

the sliding block (24) is slidably arranged on the supporting main body (1), and at least one transmission piece (22) is connected with the sliding block (24);

and the second driving piece (25) is arranged on the supporting main body (1) and is in driving connection with the sliding block (24).

8. The filtering device according to any one of claims 1-7, characterized in that the washing assembly (3) comprises a washing tank (31), at least one of the transmission members (22) being located in the washing tank (31), the remaining transmission members (22) being arranged around the periphery of the washing tank (31).

9. The filtering device according to claim 8, characterized in that the cleaning assembly (3) further comprises an ultrasonic generator (32) provided inside the cleaning tank (31).

10. The filter device according to any one of claims 1-7, characterized in that a coarse filter (8) is arranged between the filter screen (21) and the liquid-guiding opening (41).

11. The filter arrangement according to any one of claims 1-7, wherein in each set of filter assemblies (2): an auxiliary wheel (27) is attached to the bottom of the filter screen (21) located at the liquid guide opening (41), and the auxiliary wheel (27) is arranged on the support main body (1).

12. The filtering device according to any one of claims 1-7, wherein the liquid inlet assembly (4) comprises a liquid inlet tank (42), a flow guide pipe (43) communicated with the liquid inlet tank (42) and at least one liquid inlet port (44), and the liquid guide port (41) is an outlet of the flow guide pipe (43).

13. The filter arrangement according to any one of claims 1-7, further comprising:

the liquid collecting box (6) is arranged below the filter screen (21);

and the liquid pump (7) is arranged on the liquid collecting box (6).

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