A filter device for polishing slurry

Abstract

This invention discloses a filtration device for polishing slurry, comprising a bridge-shaped water tank consisting of a drain section and a filter cover, and a filter basket. In use, the filter basket is placed inside the bridge-shaped water tank, with a height difference between it and the arched drain plate of the drain section. A drain pipe passes through a first and second inlet hole to discharge the polishing slurry into the filter basket for filtration. The filtered polishing slurry is then diverted and discharged through the side plates on both sides of the arched drain plate, allowing the filtered slurry to flow along the wall of the flow channel into the flow channel. The arched drain plate raises the height of the middle of the bottom plate of the water tank, thus increasing the passage space for the polishing slurry and air bubbles, effectively improving the problem of foam blockage. Drainage through the side plates on both sides of the arched drain plate reduces the generation and accumulation of air bubbles, while also dispersing air bubbles adhering to the side walls of the flow channel. The filter basket and the bridge-shaped water tank are designed separately, allowing for changes in the filter mesh size according to actual needs and facilitating the removal and cleaning of filter residue.

Description

Technical Field

[0001] This invention relates to the field of glass processing technology, and more particularly to a filtration device for polishing and grinding fluids. Background Technology

[0002] During glass polishing and grinding, the polishing slurry can become contaminated with particulate matter and impurities. Without filtration and treatment, this contamination can negatively impact polishing results and the slurry's lifespan. Therefore, a circulating filtration system is necessary to remove impurities and particulate matter from the polishing slurry. This system effectively extends the slurry's lifespan, reduces waste and costs, and improves polishing and grinding performance and quality. This is crucial for the glass manufacturing and processing industry, as it enhances production efficiency and product quality.

[0003] Existing filter basket devices are typically mounted directly within the flow channel, occupying valuable space. Because the basket bottom is too low, it not only blocks foam from flowing with the grinding fluid, causing foam accumulation, but also leads to the grinding fluid overflowing from the basket's edge when the water flow is too rapid, resulting in poor filtration. Furthermore, the grinding fluid pouring directly from the filter basket into the flow channel carries a large amount of air, easily generating bubbles, and creating multi-layered waterfall-like water flows that intercept and hinder the flow of bubbles, causing them to gradually accumulate. Cleaning the filter residue is inconvenient; the basket cannot be removed for cleaning or the residue cannot be scraped off with tools, and if not cleaned promptly, it will clog the filter mesh, affecting filtration efficiency.

[0004] Therefore, a new solution is needed. Summary of the Invention

[0005] The main objective of this invention is to provide a filtration device for polishing and grinding fluids.

[0006] To achieve the above objectives, the present invention provides a filtration device for polishing and grinding fluids, comprising a bridge-shaped water tank consisting of a drain section and a filter cover, and a filter basket.

[0007] The drainage section includes a first left side plate, a first right side plate, an arched drainage plate, a first front side plate, and a first rear side plate, wherein the arched drainage plate is welded between the first left side plate and the first right side plate;

[0008] The filter cover includes a second left side plate, a second right side plate, a second front side plate, and a second rear side plate. The second front side plate and the second rear side plate are respectively welded to the first front side plate and the first rear side plate. A first through hole is provided on the second rear side plate.

[0009] The filter basket includes a third left side plate, a third right side plate, a filter bottom plate, a third front side plate, and a third rear side plate. The third left side plate, the third right side plate, the filter bottom plate, the third front side plate, and the third rear side plate are all perforated mesh plates. A second through hole is provided on the third rear side plate, and the second through hole is corresponding to the first through hole.

[0010] In use, the filter basket is placed in the bridge-shaped water tank and there is a height difference between it and the arched drain plate. The drain pipe passes through the first inlet hole and the second inlet hole to discharge the grinding liquid into the filter basket for filtration. The filtered grinding liquid is diverted and discharged through the side plates on both sides of the arched drain plate, so that the filtered grinding liquid flows into the flow tank along the tank wall.

[0011] In the filtration device for polishing and grinding fluid provided by the present invention, the arched drain plate includes an integrally formed first drain side plate, a second drain side plate, and a water tank bottom plate. The first drain side plate and the second drain side plate are inclined downward on both sides of the water tank bottom plate. The grinding fluid filtered in the filter basket is divided into two side streams by the water tank bottom plate and discharged along the first drain side plate and the second drain side plate respectively.

[0012] In the filtration device for polishing and grinding fluid provided by the present invention, the bridge-shaped water tank further includes a plurality of support pads welded around the inner wall of the filter cover, for supporting the placement of the filter basket so that there is a height difference between the filter base plate and the bottom plate of the water tank.

[0013] In the filtration device for polishing and grinding fluid provided by the present invention, the width of the filter basket is smaller than the width of the water tank bottom plate, and the length of the filter basket is smaller than the length of the water tank bottom plate.

[0014] In the filtration device for polishing and grinding fluid provided by the present invention, after being placed into the bridge-shaped water tank, the height of the filter basket is lower than the height of the bridge-shaped water tank.

[0015] In the filtration device for polishing and grinding fluid provided by the present invention, the filter basket further includes a first handle welded to the outer wall of the third front side plate and a second handle welded to the outer wall of the third rear side plate.

[0016] In the filtration device for polishing and grinding fluid provided by the present invention, the bridge-shaped water tank further includes a plurality of supporting ears respectively welded to the upper edges of the first left side plate, the first right side plate, the first front side plate and the first rear side plate, for assuming the bridge-shaped water tank on the flow channel.

[0017] In the filtration device for polishing and grinding fluid provided by the present invention, the filter cover further includes a first handle welded to the outer wall of the second front side plate and a second handle welded to the outer wall of the second rear side plate.

[0018] The filtration device for polishing and grinding fluid provided by the present invention also includes a water tank cover consisting of a cover base plate and a cover handle welded to the upper surface of the cover base plate.

[0019] The filtration device for polishing slurry provided by this invention has the following beneficial effects: The filtration device for polishing slurry provided by this invention includes a bridge-shaped water tank and a filter basket. The front and rear side plates of the filter cover are welded above the front and rear side plates of the drain section to form a bridge-shaped water tank. The arched drain plate of the drain section uses a structure with a central arch as the bottom plate of the bridge-shaped water tank. In use, the filter basket is placed inside the bridge-shaped water tank with a height difference between it and the arched drain plate. The drain pipe passes through the first insertion hole of the filter cover and the second insertion hole of the filter basket to drain the polishing slurry into the filter basket for filtration. The filtered grinding liquid is diverted and discharged through the side plates on both sides of the arched drain plate, allowing the filtered grinding liquid to flow into the flow channel along the channel wall. In this invention, the arched drain plate raises the height of the middle of the bottom plate of the water tank, thereby increasing the passage space for grinding liquid and air bubbles, which can effectively improve the problem of foam blockage. The drainage through the side plates on both sides of the arched drain plate can reduce the generation and accumulation of air bubbles, and at the same time disperse the air bubbles adhering to the side wall of the flow channel. The filter basket and the bridge-shaped water tank are designed separately, so the filter mesh size can be changed according to actual needs, and it is convenient to extract and clean the filter residue. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0021] Figure 1 The diagram shown is a structural schematic of a filtration device for polishing and grinding fluid provided in an embodiment of the present invention.

[0022] Figure 2 The diagram shown is a structural schematic of a bridge-shaped water tank for a filtration device for polishing and grinding fluid provided in an embodiment of the present invention.

[0023] Figure 3 The diagram shown is a schematic diagram of the filter basket of a filtration device for polishing and grinding fluid provided in an embodiment of the present invention.

[0024] Figure 4The diagram shown is a schematic diagram of the arched drain plate of a filtration device for polishing and grinding fluid provided in an embodiment of the present invention. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Typical embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] The general idea of ​​this invention is as follows: Existing filter basket devices suffer from problems such as excessively low basket bottoms, leading to water overflowing directly from the basket edge due to rapid water flow and ineffective filtration; and the grinding fluid flowing directly into the water tank from above the basket slows its flow and hinders foam accumulation within the flow tank. This invention provides a filtration device for polishing slurries, comprising a bridge-shaped water tank and a filter basket. The front and rear side plates of the filter cover are welded above the front and rear side plates of the drain section to form the bridge-shaped water tank. The arched drain plate of the drain section uses a centrally arched structure as the base of the bridge-shaped water tank. In use, the filter basket is placed within the bridge-shaped water tank with a height difference between it and the arched drain plate. The drain pipe passes through the filter basket. The first insertion hole of the cover and the second insertion hole of the filter basket allow the grinding liquid to be discharged into the filter basket for filtration. The filtered grinding liquid is then diverted and discharged through the side plates on both sides of the arched drain plate, allowing the filtered grinding liquid to flow into the flow channel along the channel wall. In this invention, the arched drain plate raises the height of the middle of the bottom plate of the water tank, thereby increasing the passage space for grinding liquid and air bubbles, which can effectively improve the problem of foam blockage. The drainage through the side plates on both sides of the arched drain plate can reduce the generation and accumulation of air bubbles, and at the same time disperse the air bubbles adhering to the side wall of the flow channel. The filter basket and the bridge-shaped water tank are designed separately, so the filter mesh size can be changed according to actual needs, and it is convenient to extract and clean the filter residue.

[0028] To better understand the above technical solutions, the following will describe the above technical solutions in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0029] Figure 1 The diagram shown is a structural schematic of a filtration device for polishing and grinding fluid provided in an embodiment of the present invention. Figure 1 As shown, the present invention provides a bridge-shaped water tank and filter basket 3 for filtration of polishing and grinding fluids. The filter basket is welded from a perforated mesh plate. The bridge-shaped water tank and filter basket are designed separately; in use, the filter basket is placed in the bridge-shaped water tank. This separate design not only facilitates cleaning, maintenance, and replacement, but also allows for the selection of filter baskets with different mesh sizes to meet various filtration requirements, such as filtration of different particle sizes. Furthermore, it allows for the use of a single bridge-shaped water tank with multiple filter baskets of various sizes, achieving multiple filtration requirements without incurring additional costs.

[0030] Figure 2 The diagram shown is a schematic representation of the bridge-shaped water tank in a filtration device for polishing and grinding fluid according to an embodiment of the present invention. Figure 2 As shown, the bridge-shaped water tank includes a discharge section 1 and a filter cover 2 welded to the discharge section 1, wherein the length of the filter cover is equal to the length of the discharge section, and the width of the filter cover is less than the width of the discharge section. Furthermore, the venting section 1 is composed of a first left side plate, a first right side plate 11, a first front side plate 13, a first rear side plate 14 welded together, and an arched venting plate 12 welded between the first left side plate and the first right side plate 11; the filter cover 2 is composed of a second left side plate 21, a second right side plate 22, a second front side plate 23, and a second rear side plate 24 welded together, and the second front side plate 23 and the second rear side plate 24 are respectively welded to the first front side plate 13 and the first rear side plate 14. Thus, a venting space is formed between the first left side plate and the second left side plate 21 and between the first right side plate 11 and the second right side plate 22. The filtrate from the arched venting plate 12 flows to the flow channel below through this venting space. Since the arched venting plate 12 raises the height of the middle part of the water tank, the passage space for grinding liquid and air bubbles in the lower flow channel is larger, which can effectively improve the situation of foam blockage in the flow channel. Furthermore, a first insertion hole 241 is provided on the second rear side plate 24, through which the polishing and grinding fluid drain pipe directly discharges the grinding fluid in the machine into the filter device.

[0031] Furthermore, in one embodiment of the present invention, a plurality of supporting ears 6 are welded around the outer walls of the first left side plate and the aforementioned first right side plate 11, and the bridge-shaped water tank is supported on the opening of the flow channel by the plurality of supporting ears 6. Compared with placing the filter device inside the tank, supporting the filter device on the opening of the tank by the supporting ears horizontally raises the bottom height of the filter device, which can increase the flow space of the grinding liquid and air bubbles in the flow channel below, and further improve the clogging and accumulation of foam in the flow channel.

[0032] Figure 3The diagram shown is a schematic representation of the filter basket of a filtration device for polishing and grinding fluid according to an embodiment of the present invention. Figure 3 As shown, the filter basket 3 is composed of a third left side plate 31, a third right side plate 32, a filter base plate 33, a third front side plate 34, and a third rear side plate 35 welded together. All three plates—the third left side plate 31, the third right side plate 32, the filter base plate 33, the third front side plate 34, and the third rear side plate 35—are perforated mesh plates. The mesh size of these plates can be adjusted to meet the needs of different users. Simultaneously, a second through-hole 351 is provided on the third rear side plate 35. This second through-hole 351 corresponds to the first through-hole 241, allowing the polishing slurry drain pipe to pass through both the first and second through-holes 241, directly draining the polishing slurry from the machine into the filter basket. When in use, the filter basket 3 is placed in the bridge-shaped water tank and there is a certain height difference between the filter bottom plate 33 and the arched drain plate 12 so that the grinding liquid filtered by the filter basket 3 can be diverted and discharged through the side plates on both sides of the arched drain plate, thereby allowing the filtered grinding liquid to flow into the flow tank along the tank wall.

[0033] Compared to existing technologies that use a filter basket to directly pour the filtered grinding fluid into the flow channel below, this invention concentrates the grinding fluid from the filter basket onto the side plates on both sides of the arched drain plate before discharging it onto the side wall of the flow channel. Because the water flow on the side wall is thinner and carries less gas, it reduces the generation of bubbles in the flow channel. Simultaneously, the filtered grinding fluid flows obliquely into the flow channel from both side walls, concentrating the water flow velocity and driving the flow velocity of the grinding fluid and bubbles within the flow channel, thus preventing bubble accumulation. Furthermore, bubbles tend to move towards the side wall due to surface tension. In this application, the filtered grinding fluid is discharged onto the side wall of the flow channel via the side plates on both sides of the arched drain plate. Therefore, the grinding fluid continuously washes against the side wall, causing an imbalance in the surface tension of the bubble film, thereby dispersing the foam adhering to the side wall.

[0034] Figure 4 The diagram shown is a schematic representation of the drain plate of a bridge-shaped water tank in a filtration device for polishing and grinding fluid according to an embodiment of the present invention. Figure 4 As shown, the arched drain plate 12 includes an integrally formed first drain side plate 121, second drain side plate 122, and water tank bottom plate 123. The first drain side plate 121 and the second drain side plate 122 are formed downwardly on both sides of the water tank bottom plate 123, forming an arched drain plate that is high in the middle and low on both sides. This allows the grinding liquid filtered in the filter basket 3 to be divided into two side streams by the water tank bottom plate 123 and discharged into the flow tank below along the first drain side plate 121 and the second drain side plate 122, respectively.

[0035] Through the first and second drain side plates of the arched drain plate 12, the filtered grinding fluid can enter the flow tank through the side wall of the flow tank. Thus, the side plates and side walls form two buffer layers. First, they can provide resistance to reduce the flow rate of the grinding fluid and reduce the generation of bubbles. Second, the water flow on the side wall is thinner and carries less gas, which can further reduce the generation of bubbles. Third, the filtered grinding fluid continuously washes the side wall, causing the surface tension of the bubble film adhering to the side wall to become unbalanced, which can disperse the foam accumulated on the side wall. Finally, the filtered grinding fluid is discharged from the first and second drain side plates, concentrating into two streams of water with a faster flow rate, which can drive the water flow speed in the flow tank, making the flow of the filtered grinding fluid and bubbles smoother.

[0036] Furthermore, in one embodiment of the present invention, as... Figure 2 As shown, the bridge-shaped water tank also includes multiple support pads 4 welded to the inner wall of the filter cover 2 to support the filter basket 3, creating a height difference between the filter base plate 33 and the water tank bottom plate 123 for drainage of the filtrate. The filtered grinding liquid is split into two streams by the drain plate and discharged laterally, no longer vertically, but flowing along the tank wall into the flow channel. By welding support pads inside the bridge-shaped water tank, the filter basket is placed directly on the support pads. This not only creates a certain height difference between the filter basket and the water tank bottom plate, facilitating the rapid entry of the filtered grinding liquid into the bridge-shaped water tank, but also effectively prevents the grinding liquid from staying in the filtration process for too long, reducing the sedimentation of pollutants and improving the filtration effect. Furthermore, it allows for free removal and placement of the filter basket, facilitating the cleaning of filter residue and subsequent maintenance. Because the filter basket can be freely removed and placed, operators can easily take it out and clean the filter residue without cleaning the entire water tank, saving cleaning time and labor costs.

[0037] Furthermore, in one embodiment of the present invention, the width of the filter basket 3 is less than the width of the water tank bottom plate 123, and the length of the filter basket 3 is less than the length of the water tank bottom plate 123. Because the width of the filter basket is less than the width of the water tank bottom plate, a certain flow space is left between the two sides of the filter basket and the left and right side plates of the filter cover. This gap allows the grinding liquid to flow smoothly from the two sides of the filter basket into the bridge-shaped water tank. Similarly, the length of the filter basket is less than the length of the water tank bottom plate, so a certain flow space is also formed between the front and rear of the filter basket and the front and rear side plates of the filter cover. This gap allows the grinding liquid filtered by the filter basket to flow smoothly from the front and rear of the filter basket into the bridge-shaped water tank. The existence of these flow spaces allows the grinding liquid to pass through the filter basket more quickly and enter the bridge-shaped water tank rapidly, thereby significantly reducing the time the grinding liquid stays in the filter basket during the filtration process, avoiding the sedimentation of contaminants, and improving the filtration effect.

[0038] Furthermore, in one embodiment of the present invention, after being placed in the bridge-shaped water tank, the height of the filter basket 3 is lower than the height of the bridge-shaped water tank. When the grinding liquid is filtered through the filter basket, if the water flow velocity is too high or the filter screen holes are blocked by filter residue, setting the height of the filter basket lower than the height of the bridge-shaped water tank allows the grinding liquid to overflow through the edge of the filter basket when it cannot be discharged through the filter screen holes, and then flow into the bridge-shaped water tank, and then be discharged through the side plates on both sides of the arched drainage plate of the water tank, ensuring that the grinding liquid can be discharged smoothly. Therefore, by setting the height of the filter basket lower than that of the bridge-shaped water tank, it can be ensured that the grinding liquid can be discharged smoothly into the bridge-shaped water tank. At the same time, the overflow from the edge of the filter basket and the discharge from the side plates of the bridge-shaped water tank provide alternative drainage paths to deal with abnormal situations and ensure that the grinding liquid can always be discharged effectively.

[0039] Furthermore, in one embodiment of the present invention, the filter basket further includes a first handle 36 welded to the outer wall of the third front side plate 34 and a second handle 37 welded to the outer wall of the third rear side plate 35. By providing the first and second handles, the operator can more easily grasp the filter basket and lift it directly from the bridge-shaped water tank, improving operational convenience. When the filter basket needs cleaning, the operator can use tools such as a shovel to directly remove the filter residue inside the basket, or completely remove the filter basket for cleaning. The presence of the handles makes the cleaning process more flexible and efficient, requiring no additional complex steps or tools, reducing maintenance and upkeep workload.

[0040] Furthermore, in one embodiment of the present invention, the filter cover 2 further includes a first handle 25 welded to the outer wall of the second front side plate 23 and a second handle 26 welded to the outer wall of the second rear side plate 24. The first and second handles make it easier for the operator to grasp the bridge-shaped water tank, facilitating its placement at the opening of the flow channel and improving operational convenience.

[0041] Furthermore, in one embodiment of the present invention, a water tank cover 5 is also included, consisting of a cover base plate 51 and a cover handle 52 welded to the upper surface of the cover base plate 51. The water tank cover completely seals the top of the water tank, preventing the grinding fluid from splashing out during the drainage filtration process. When performing the drainage filtration process, covering the water tank effectively prevents the grinding fluid from splashing everywhere during operation. This not only protects the operator's safety but also reduces workplace clutter and cleaning workload. During the drainage filtration process, using the water tank cover prevents the grinding fluid from entering other parts of the equipment, such as the motor and circuitry, thus extending the equipment's lifespan and reducing maintenance and upkeep requirements. Therefore, the water tank cover plays a role in preventing splashing and protecting the equipment during the drainage filtration process, contributing to improved safety.

[0042] The working process of the filtration device for polishing slurry provided by this invention is described in detail below: In use, firstly, a bridge-shaped water tank is erected at the opening of the flow tank; then, a filter basket of appropriate specifications is placed on the support pad of the bridge-shaped water tank; next, the polishing slurry drain pipe is inserted into the filter basket through the first and second inlet holes to directly discharge the polishing slurry from the machine into the filter basket; the filter basket filters the discharged polishing slurry, the filter residue is stored in the basket, and the filtered polishing slurry is discharged into the bridge-shaped water tank through the filter holes; due to the height difference between the bottom plate of the filter basket and the arched drain plate, the filtered polishing slurry is discharged through the drain side plates on both sides of the arched drain plate into the side wall of the flow tank below, and then enters the flow tank through the side wall. This not only provides more space for the polishing slurry and air bubbles to pass through, improving foam blockage; it also reduces the generation and accumulation of air bubbles in the flow tank, and disperses air bubbles adhering to the side wall of the flow tank, thereby improving the filtration effect and working efficiency.

[0043] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0044] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0045] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0046] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A filtration device for polishing and grinding fluid, characterized in that, It includes a bridge-shaped water tank and a filter basket (3) consisting of a drain section (1) and a filter cover (2). The drainage section (1) includes a first left side plate, a first right side plate (11), an arched drainage plate (12), a first front side plate (13) and a first rear side plate (14), and the arched drainage plate (12) is welded between the first left side plate and the first right side plate (11); The filter cover (2) includes a second left side plate (21), a second right side plate (22), a second front side plate (23), and a second rear side plate (24). The second front side plate (23) and the second rear side plate (24) are respectively welded to the first front side plate (13) and the first rear side plate (14). The second rear side plate (24) has a first through hole (241). The filter basket (3) includes a third left side plate (31), a third right side plate (32), a filter bottom plate (33), a third front side plate (34), and a third rear side plate (35). The third left side plate (31), the third right side plate (32), the filter bottom plate (33), the third front side plate (34), and the third rear side plate (35) are all perforated mesh plates. The third rear side plate (35) is provided with a second through hole (351), which is corresponding to the first through hole (241). In use, the filter basket (3) is placed in the bridge-shaped water tank and there is a height difference between it and the arched drain plate (12). The drain pipe passes through the first inlet hole (241) and the second inlet hole (351) to discharge the grinding liquid into the filter basket (3) for filtration. The filtered grinding liquid is diverted and discharged through the side plates on both sides of the arched drain plate (12), so that the filtered grinding liquid flows into the flow tank along the tank wall. The arched drain plate (12) includes an integrally formed first drain side plate (121), second drain side plate (122) and water tank bottom plate (123). The first drain side plate (121) and the second drain side plate (122) are inclined downward on both sides of the water tank bottom plate (123). The grinding liquid filtered in the filter basket (3) is divided into two side streams by the water tank bottom plate (123) and discharged along the first drain side plate (121) and the second drain side plate (122) respectively.

2. The filtration device for polishing and grinding fluid as described in claim 1, characterized in that, The bridge-shaped water tank also includes multiple support pads (4) welded around the inner wall of the filter cover (2) to support the placement of the filter basket (3) so that there is a height difference between the filter base plate (33) and the water tank base plate (123).

3. The filtration device for polishing and grinding fluid as described in claim 2, characterized in that, The width of the filter basket (3) is less than the width of the bottom plate (123) of the water tank, and the length of the filter basket (3) is less than the length of the bottom plate (123) of the water tank.

4. The filtration device for polishing and grinding fluid as described in claim 3, characterized in that, After being placed into the bridge-shaped water tank, the height of the filter basket (3) is lower than the height of the bridge-shaped water tank.

5. The filtration device for polishing slurry as described in claim 1, characterized in that, The filter basket also includes a first handle (36) welded to the outer wall of the third front side plate (34) and a second handle (37) welded to the outer wall of the third rear side plate (35).

6. The filtration device for polishing and grinding fluid as described in claim 4, characterized in that, The bridge-shaped water tank also includes a plurality of support ears (6) respectively welded to the upper edges of the first left side plate, the first right side plate (11), the first front side plate (13) and the first rear side plate (14), for mounting the bridge-shaped water tank on the flow channel.

7. The filtration device for polishing slurry as described in claim 1, characterized in that, The filter cover (2) also includes a first handle (25) welded to the outer wall of the second front side plate (23) and a second handle (26) welded to the outer wall of the second rear side plate (24).

8. The filtration device for polishing slurry as described in claim 1, characterized in that, It also includes a sink cover (5) consisting of a base plate (51) and a handle (52) welded to the upper surface of the base plate (51).

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