Multi-layer filtering device for polishing solution

Abstract

The utility model belongs to the technical field of polishing solution filtering, and particularly relates to a multi-layer polishing solution filtering device which comprises a filtering box, a cleaning device and a plurality of filtering assemblies, a filter cavity is formed in the filter box, a plurality of mounting ports communicated with the filter cavity are sequentially formed in the outer wall of the filter box from top to bottom, and guide grooves corresponding to the mounting ports are formed in the inner wall of the filter box; a first liquid inlet communicated with the filtering cavity is formed in the upper end of the filtering box, and a first liquid outlet communicated with the filtering cavity is formed in the lower end of the filtering box; each filter assembly comprises a filter frame and one or more layers of filter screens arranged in the filter frame; a frame plate is arranged at one end of each filter frame, each filter frame is detachably mounted in the filter cavity from one mounting opening along the corresponding guide groove, and the frame plates cover the mounting openings; the polishing liquid is input into the filtering cavity from the first liquid inlet and then is filtered for multiple times through the filtering nets of the multiple filtering assemblies, the filtering effect of the polishing liquid is improved, and therefore the influence of impurities such as chippings on recycling of the polishing liquid is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of polishing liquid filtration, and particularly relates to a multi-layer polishing liquid filtration device. Background Art

[0002] A polishing liquid is a water-soluble polishing agent without any sulfur, phosphorus, or chlorine additives. The polishing liquid has good degreasing, rust prevention, cleaning, and brightening properties, and can make metal products show their true metallic luster. It has the advantages of stable performance, non-toxicity, and no pollution to the environment.

[0003] During the polishing process, debris and impurities will be mixed into the polishing liquid. When the polishing liquid is recycled, a filtration device is needed to filter the polishing liquid. However, the filtration effect of the existing polishing liquid filtration device is poor, which affects the recycling of the polishing liquid. In addition, after the filter screen of the filtration device is used for a long time, the filter screen needs to be cleaned. Currently, the filter screen is usually cleaned manually, which is not conducive to use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-layer polishing liquid filtration device, aiming to solve one of the technical problems existing in the prior art.

[0005] To achieve the above purpose, a multi-layer polishing liquid filtration device provided by an embodiment of the utility model includes a filtration tank, a cleaning device, and a plurality of filtration components; a filtration chamber is provided in the filtration tank, a plurality of mounting ports communicating with the filtration chamber are sequentially arranged on the outer wall of the filtration tank from top to bottom, and a guiding groove corresponding to the mounting port is provided on the inner wall of the filtration tank; a first liquid inlet communicating with the filtration chamber is provided at the upper end of the filtration tank, and a first liquid outlet communicating with the filtration chamber is provided at the lower end of the filtration tank;

[0006] Each of the plurality of filtration components includes a filtration frame and one or more layers of filter screens arranged in the filtration frame; a frame plate is provided at one end of the filtration frame, and each filtration frame is detachably installed in the filtration chamber from one of the mounting ports and along the corresponding guiding groove, and the frame plate covers the mounting port;

[0007] The cleaning device includes a cleaning tank and a brush assembly; a brushing chamber and a flushing chamber are provided in the cleaning tank, a first opening and a second opening communicating with the brushing chamber and the flushing chamber respectively are provided at the top of the cleaning tank, the first opening is used for a filtration frame to be vertically inserted into the brushing chamber, and the second opening is used for a filtration frame to be vertically inserted into the flushing chamber; the brush assembly is arranged in the brushing chamber and is used for cleaning the filter screen in the brushing chamber, and a plurality of first spray heads are arranged in the flushing chamber, and the first spray heads are used for flushing the filter screen in the flushing chamber.

[0008] Optionally, the brush assembly includes a motor, a lead screw, a slide bar, and a brush holder; the lead screw and the slide bar are respectively vertically arranged on opposite sides of the scrubbing chamber, and the upper and lower ends of the lead screw are respectively rotatably connected to the top wall and the bottom wall of the scrubbing chamber through bearings; the brush holder is horizontally arranged and nuts and sliders are respectively provided at both ends thereof, the nut is fitted and screwed onto the lead screw, and the slider is slidably connected to the slide bar; bristles are provided on one side of the brush holder close to the filter screen; the motor is arranged on the top of the cleaning tank and the output shaft thereof is fixedly connected to the upper end of the lead screw, and the motor is used to drive the lead screw to rotate, so as to drive the bristles of the brush holder to move up and down for cleaning impurities attached to the filter screen.

[0009] Optionally, a plurality of through holes are equidistantly arranged along the length direction of the brush holder, the plurality of through holes all penetrate through a connecting rod, a brush plate is provided at one end of the plurality of connecting rods, the bristles are provided on the surface of the brush plate facing away from the connecting rod, a plurality of limiting parts protrude from the other ends of the plurality of connecting rods, and the limiting parts are larger than the through holes; a spring is sleeved outside each of the plurality of connecting rods, and two ends of the spring respectively abut against the brush holder and the brush plate.

[0010] Optionally, a second liquid inlet communicating with the scrubbing chamber is provided at the upper end of the cleaning tank, and a second liquid outlet communicating with the scrubbing chamber is provided at the bottom of the cleaning tank.

[0011] Optionally, a third liquid outlet communicating with the flushing chamber is provided at the bottom of the cleaning tank.

[0012] Optionally, the outer sides of the first opening and the second opening are both increased in size to form a first limiting groove, and the first limiting groove is used to fit and accommodate the frame plate.

[0013] Optionally, a plurality of threaded holes communicating with the plurality of mounting openings are formed in the side wall of the filter tank, and a screw is screwed into each of the plurality of threaded holes, and tightening the screw is used to lock the filter assembly in the filter chamber.

[0014] Optionally, a U-shaped handle is provided on the outer side wall of the frame plate, and an anti-slip grip glove is sleeved on the outer surface of the U-shaped handle.

[0015] Optionally, the outer sides of the mounting openings are all increased in size to form a second limiting groove, the second limiting groove is used to fit and accommodate the frame plate, and a first sealing gasket is provided in the second limiting groove.

[0016] Optionally, a plurality of second spray heads are provided at the top of the filter chamber, and the second spray heads are used to flush the filter chamber; a first liquid outlet communicating with the filter chamber is provided at the bottom of the cleaning tank.

[0017] Compared with the prior art, one or more of the above technical solutions in the polishing liquid multi-layer filtration device provided by the embodiments of the present invention have at least one of the following technical effects:

[0018] The polishing liquid is input into the filtration chamber from the first liquid inlet, and then the polishing liquid passes through the filter meshes of multiple filter components for multiple filtrations, improving the filtration effect of the polishing liquid, thereby reducing the influence of debris and other impurities on the recycling use of the polishing liquid.

[0019] After the filter mesh has been used for a long time, the worker pulls out the filter component from the installation opening, and then vertically inserts the filter frame of the filter component into the brushing chamber from the first opening. The filter mesh in the brushing chamber is cleaned by the brush component. Then, the filter component is pulled out from the first opening and vertically inserted into the flushing chamber from the second opening, and the filter mesh is sprayed and flushed with water by multiple first spray heads to clean the filter mesh, eliminating the need for manual cleaning of the filter mesh and facilitating user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the polishing liquid multi-layer filtration device of the present invention.

[0022] Figure 2 It is an exploded view of the polishing liquid multi-layer filtration device of the present invention.

[0023] Figure 3 It is a cross-sectional view of the filter box and the filter component of the present invention.

[0024] Figure 4 It is a cross-sectional view of the cleaning device of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the brush component of the present invention.

[0026] Among them, the reference numerals in the drawings are as follows:

[0027] 100, filter box; 110, filtration chamber; 111, second spray head; 112, first liquid discharge port; 120, installation opening; 121, second limiting groove; 122, first sealing gasket; 130, guiding groove; 140, first liquid inlet; 150, first liquid outlet; 160, threaded hole; 170, screw rod; 171, circular handle

[0028] 200, Filter component; 210, Filter box; 220, Filter net; 230, Frame plate; 231, U-shaped handle; 232, Anti-slip grip glove

[0029] 300, Cleaning device; 310, Cleaning tank; 311, First opening; 312, Second opening; 313, First limiting groove; 320, Brushing chamber; 321, Second liquid inlet; 322, Second liquid discharge port; 330, Flushing chamber; 331, First spray head; 332, Third liquid discharge port; 350, Brush component; 351, Motor; 352, Lead screw; 353, Brush holder; 354, Brush bristles; 355, Nut seat; 356, Slide block; 357, Connecting rod; 357a, Limiting part; 358, Brush plate; 359, Spring Detailed implementation manners

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the embodiments of the present utility model and should not be construed as a limitation of the present utility model

[0031] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality" means two or more unless otherwise specifically defined

[0033] In the embodiments of the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0034] In one embodiment of the present utility model, referring to Figures 1-5 , a multi-layer polishing liquid filtering device is provided, which includes a filtering box 100, a cleaning device 300 and a plurality of filtering components 200.

[0035] Among them, referring to Figures 1-4 , a filtering cavity 110 is provided inside the filtering box 100. A plurality of mounting openings 120 communicating with the filtering cavity 110 are sequentially provided on the outer wall of the filtering box 100 from top to bottom, and a guiding groove 130 corresponding to the mounting opening 120 is provided on the inner wall of the filtering box 100. A first liquid inlet 140 communicating with the filtering cavity 110 is provided at the upper end of the filtering box 100, and a first liquid outlet 150 communicating with the filtering cavity 110 is provided at the lower end of the filtering box 100.

[0036] Among them, referring to Figures 1-4 , each of the plurality of filtering components 200 includes a filtering frame 210 and one or more filter meshes 220 provided in the filtering frame 210. One end of the filtering frame 210 is provided with a frame plate 230. Each filtering frame 210 is detachably installed in the filtering cavity 110 from a mounting opening 120 and along a corresponding guiding groove 130, and the frame plate 230 covers the mounting opening 120.

[0037] Among them, referring to Figures 1-4 , the cleaning device 300 includes a cleaning box 310 and a brush assembly 350. A brushing cavity 320 and a flushing cavity 330 are provided inside the cleaning box 310. A first opening 311 and a second opening 312 communicating with the brushing cavity 320 and the flushing cavity 330 respectively are provided at the top of the cleaning box 310. The first opening 311 is used for a filtering frame 210 to be vertically inserted into the brushing cavity 320, and the second opening 312 is used for a filtering frame 210 to be vertically inserted into the flushing cavity 330. The brush assembly 350 is provided in the brushing cavity 320 and is used for cleaning the filter mesh 220 in the brushing cavity 320. A plurality of first spray nozzles 331 are provided in the flushing cavity 330, and the first spray nozzles 331 are used for flushing the filter mesh 220 in the flushing cavity 330. A plurality of spray holes are evenly provided on the surface of the first spray nozzles 331, and clear water sprays out from the plurality of spray holes to flush the filter mesh 220 in the washing cavity. The first spray nozzles 331 are similar to the structure of a shower head.

[0038] Compared with the prior art, one or more of the above technical solutions in the polishing liquid multi-layer filtration device provided by the embodiments of the present utility model have at least one of the following technical effects:

[0039] Referring to Figures 1-4 , the polishing liquid is input into the filtration chamber 110 from the first liquid inlet 140, and then the polishing liquid passes through the filter meshes 220 of multiple filter components 200 for multiple filtrations, improving the filtration effect of the polishing liquid, thereby reducing the influence of debris and other impurities on the recycling of the polishing liquid. The polishing liquid filtered by the filter meshes 220 of multiple filter components 200 is output from the first liquid outlet 150.

[0040] Referring to Figures 1-4 , after the filter mesh 220 is used for a long time, the worker pulls out the filter component 200 from the installation opening 120, and then vertically inserts the filter frame 210 of the filter component 200 into the brushing chamber 320 from the first opening 311, and cleans the filter mesh 220 in the brushing chamber 320 through the brush assembly 350. Then, the filter component 200 is pulled out from the first opening 311 and vertically inserted into the flushing chamber 330 from the second opening 312, and the filter mesh 220 is flushed with water by multiple first spray heads 331, so that the filter mesh 220 is cleaned without manually cleaning the filter mesh 220, which is convenient for users. The cleaned filter component 200 is installed into the filtration chamber 110 from the installation opening 120 to continue filtering the polishing liquid, which is beneficial to recycling.

[0041] Preferably, referring to Figure 3 , the pore diameters of the filter meshes 220 of multiple filter components 200 arranged from top to bottom are sequentially set from large to small, which can better filter debris and other impurities in the polishing liquid.

[0042] In another embodiment of the present utility model, referring to Figure 4The brush assembly 350 includes a motor 351, a screw rod 352, a slide rod and a brush holder 353. The screw rod 352 and the slide rod are respectively vertically arranged on opposite sides of the brushing chamber 320. The upper end and the lower end of the screw rod 352 are respectively rotatably connected to the top wall and the bottom wall of the brushing chamber 320 through bearings, and the upper end and the lower end of the slide rod are respectively fixed to the top wall and the bottom wall of the brushing chamber 320. The brush holder 353 is horizontally arranged and has a nut seat 355 and a slide block 356 at both ends. The nut seat 355 is adapted to be screwed to the screw rod 352, and the slide block 356 is slidably connected to the slide rod. Bristles 354 are arranged on the side of the brush holder 353 close to the filter screen 220. The motor 351 is disposed at the top of the cleaning box 310 and its output shaft is fixedly connected to the upper end of the screw rod 352. The motor 351 is used to drive the screw rod 352 to rotate, thereby driving the bristles 354 of the brush holder 353 to move up and down, so as to clean the impurities attached to the filter 220. During cleaning, the motor 351 drives the screw rod 352 to rotate back and forth, thereby driving the bristles 354 of the brush holder 353 to move up and down back and forth, and the bristles 354 of the brush holder 353 abut against the filter 220 in the brushing cavity 320. Therefore, in the process of the bristles 354 moving up and down back and forth, the impurities or blockages attached to the filter 220 are brushed off, thereby achieving the effect of cleaning the filter 220.

[0043] Further, refer to Figure 4 and Figure 5 The brush holder 353 is provided with a plurality of holes at equal intervals along its length direction, and the plurality of holes are all provided on a connecting rod 357. A brush plate 358 is provided at one end of the plurality of connecting rods 357, and the bristles 354 are provided on the surface of the brush plate 358 on one side away from the connecting rod 357. The other ends of the plurality of connecting rods 357 are provided with a plurality of stoppers 357a, and the stoppers 357a are larger than the stoppers, and the stoppers 357a prevent the connecting rods 357 from being separated from the stoppers. A spring 359 is sleeved outside the plurality of connecting rods 357, and the two ends of the spring 359 are respectively in contact with the brush holder 353 and the brush plate 358. The spring 359 plays a role of buffering and supporting. Even if the filter 220 is bent and deformed, the spring 359 can elastically push the bristles 354 of the brush plate 358 to fully contact the filter 220, thereby ensuring that the filter 220 is effectively cleaned. It is understandable that the material and hardness of the bristles 354 can ensure that impurities or blockages on the filter screen 220 are effectively removed without causing damage to the filter screen 220.

[0044] Further, refer to Figure 1 and Figure 4The upper end of the cleaning box 310 is provided with a second liquid inlet 321 connected to the scrubbing chamber 320. A cleaning solution can be input into the scrubbing chamber 320 through the second liquid inlet 321. For example, the cleaning solution can be a chemical such as sodium hydroxide, which improves the efficiency of cleaning impurities or dirt attached to the filter 220. The bottom of the cleaning box 310 is provided with a second liquid discharge port 322 connected to the scrubbing chamber 320. The second liquid discharge port 322 is provided with a second valve body (not shown in the figure). The impurities or dirt washed off the filter 220 will sink to the bottom of the scrubbing chamber 320. When the impurities at the bottom of the scrubbing chamber 320 reach a certain amount, the second liquid discharge port 322 is opened through the second valve body, and the impurities are discharged from the second liquid discharge port 322.

[0045] Further, refer to Figure 1 and Figure 4 The bottom of the cleaning box 310 is provided with a third drain port 332 connected to the flushing chamber 330. The third drain port 332 is provided with a third valve body (not shown in the figure). The third drain port 332 is opened by the third valve body to discharge the sewage or dirt in the flushing chamber 330.

[0046] Further, refer to Figure 2 and Figure 4 The first opening 311 and the second opening 312 are both enlarged on the outer side to form a first limiting groove 313, and the first limiting groove 313 is used to accommodate the frame plate 230. When cleaning, the filter frame 210 of the filter assembly 200 is vertically inserted into the brushing cavity 320 from the first opening 311, and the frame plate 230 abuts against the first limiting groove 313 to prevent the filter assembly 200 from falling into the brushing cavity 320, and the structure is reliable.

[0047] Further, refer to Figure 2 The side wall of the filter box 100 is provided with a plurality of threaded holes 160 connected to the plurality of mounting ports 120, and each of the plurality of threaded holes 160 is screwed with a screw 170, and tightening the screw 170 is used to lock the filter assembly 200 in the filter cavity 110. Specifically, by tightening the screw 170, the end of the screw 170 presses the filter frame 210 of the filter assembly 200, thereby locking the filter assembly 200 in the filter cavity 110. When the filter assembly 200 needs to be removed, the screw 170 is loosened, and the end of the screw 170 releases the pressing of the filter frame 210 of the filter assembly 200, so that the filter assembly 200 can be pulled out from the mounting port 120, and the structure is simple. Preferably, a round handle 171 is provided at one end of the screw 170, so that the user can conveniently screw the screw 170.

[0048] Further, refer to Figure 2, an outer wall of the frame plate 230 is provided with a U-shaped handle 231, and the U-shaped handle 231 improves the convenience of pulling and disassembling the filter assembly 200 in the guide groove 130. An anti-slip grip cover 232 is sleeved on an outer surface of the U-shaped handle 231, and the anti-slip grip cover 232 plays an anti-slip role and facilitates a user to hold the U-shaped handle 231.

[0049] Further, with reference to Figure 2 and Figure 3 , a size of an outer side of the installation opening 120 is increased to form a second limiting groove 121. The second limiting groove 121 is used for fitting and accommodating the frame plate 230, and a first sealing gasket 122 is provided in the second limiting groove 121. The sealing performance between the frame plate 230 and the second limiting groove 121 is improved through the first sealing gasket 122 to prevent liquid leakage.

[0050] Further, with reference to Figure 1 and Figure 3 , a plurality of second spray heads 111 are provided at a top of the filtering cavity 110, and the second spray heads 111 are used for flushing the filtering cavity 110. A first drain port 112 communicating with the filtering cavity 110 is provided at a bottom of the cleaning tank 310, and a first valve body is provided on an inner wall of the filtering cavity 110. After long-term use, impurities will adhere to the inner wall of the filtering cavity 110. The plurality of filter assemblies 200 are removed, and then the inner wall of the filtering cavity 110 is flushed by blowing through spray holes of the plurality of second spray heads 111. The first drain port 112 is opened through the first valve body, and sewage and dirt in the filtering cavity 110 are discharged to clean the filtering cavity 110. Structures of the second spray heads 111 are the same as those of the first spray heads 331.

[0051] Wherein, the filter net 220 may be a stainless steel filter net. Both the first spray heads 331 and the second spray heads 111 may be connected to a water faucet through water pipes.

[0052] The remaining part of this embodiment is the same as that of the first embodiment. Features not explained in this embodiment all adopt the explanations of the first embodiment and will not be elaborated here.

[0053] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, its architecture form can be flexibly changed, and a series of products can be derived. Just making several simple deductions or replacements should be regarded as belonging to the patent protection scope determined by the claims submitted by the present invention.

Claims

1. A polishing liquid multilayer filtration device, characterized in that: It comprises a filter box, a cleaning device and a plurality of filter components; a filter cavity is arranged in the filter box, a plurality of mounting ports communicating with the filter cavity are arranged in sequence from top to bottom on the outer wall of the filter box, and a guide groove corresponding to the mounting port is arranged on the inner wall of the filter box; a first liquid inlet communicating with the filter cavity is arranged at the upper end of the filter box, and a first liquid outlet communicating with the filter cavity is arranged at the lower end of the filter box; The plurality of filter assemblies each include a filter frame and one or more filter screens disposed in the filter frame; a frame plate is disposed at one end of the filter frame, each filter frame is detachably mounted in the filter cavity from an installation opening and along a corresponding guide groove, and the frame plate cover is disposed at the installation opening; The cleaning device includes a cleaning box and a brush assembly; a brushing chamber and a flushing chamber are provided in the cleaning box, and a first opening and a second opening connecting the brushing chamber and the flushing chamber are respectively provided on the top of the cleaning box, the first opening is used for the filter frame to be vertically inserted into the brushing chamber, and the second opening is used for the filter frame to be vertically inserted into the flushing chamber; the brush assembly is arranged in the brushing chamber and is used for cleaning the filter net in the brushing chamber, and a plurality of first nozzles are provided in the flushing chamber, and the first nozzles are used for flushing the filter net in the flushing chamber.

2. The polishing liquid multilayer filtration device according to claim 1, characterized in that: The brush assembly includes a motor, a screw rod, a sliding rod and a brush rack; the screw rod and the sliding rod are respectively vertically arranged on opposite sides of the brushing chamber, and the upper and lower ends of the screw rod are rotatably connected to the top wall and bottom wall of the brushing chamber through bearings; the brush rack is horizontally arranged and has a nut seat and a sliding block at both ends, the nut seat is adapted to be screwed to the screw rod, and the sliding block is slidably connected to the sliding rod; bristles are provided on the side of the brush rack close to the filter; the motor is arranged at the top of the cleaning box and its output shaft is fixedly connected to the upper end of the screw rod, and the motor is used to drive the screw rod to rotate, thereby driving the bristles of the brush rack to move up and down, so as to clean impurities attached to the filter net.

3. The polishing liquid multilayer filtration device according to claim 2, characterized in that: The brush holder is provided with a plurality of through holes at equal intervals along its length direction, and the plurality of through holes are all penetrated through a connecting rod, and a brush plate is provided at one end of the plurality of connecting rods, and the bristles are provided on a surface of the brush plate which is away from the connecting rod, and the other ends of the plurality of connecting rods are provided with a plurality of limiting parts, and the limiting parts are larger than the through holes; a spring is sleeved on the outside of the plurality of connecting rods, and the two ends of the spring are respectively in contact with the brush holder and the brush plate.

4. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The upper end of the cleaning box is provided with a second liquid inlet connected to the scrubbing cavity, and the bottom of the cleaning box is provided with a second liquid discharge port connected to the scrubbing cavity.

5. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The bottom of the cleaning box is provided with a third liquid discharge port connected to the flushing cavity.

6. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The outer sides of the first opening and the second opening are both enlarged to form a first limiting groove, and the first limiting groove is used to accommodate the frame plate.

7. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The side wall of the filter box is provided with a plurality of threaded holes connected to the plurality of mounting ports, and each of the plurality of threaded holes is threadedly connected with a screw rod, and tightening the screw rod is used to lock the filter assembly in the filter cavity.

8. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The outer side wall of the frame plate is provided with a U-shaped handle, and the outer surface of the U-shaped handle is sleeved with an anti-slip armrest cover.

9. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: The outer side of the installation opening is enlarged in size to form a second limiting groove, the second limiting groove is used to accommodate the frame plate, and the second limiting groove is provided with a first sealing gasket.

10. The polishing liquid multilayer filtration device according to any one of claims 1 to 3, characterized in that: A plurality of second nozzles are arranged on the top of the filter cavity, and the second nozzles are used for flushing the filter cavity; a first liquid discharge port communicating with the filter cavity is arranged at the bottom of the cleaning box.

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