A metalworking fluid filtration system

Abstract

The utility model relates to a kind of metalworking cooling liquid filtration systems, including primary water tank, secondary water tank, magnetic separation device, vortex separator, refrigerating unit, magnetic lift pump and vortex lift pump, the bottom of primary water tank is conical, primary water tank bottom is also equipped with blowdown, magnetic lift pump is used to pump the cooling liquid in the primary water tank into the magnetic separation device, the liquid outlet of the magnetic separation device is communicated with the secondary water tank, vortex lift pump is used to pump the cooling liquid in the secondary water tank into the vortex separator, vortex separator includes clean liquid outlet, the clean liquid after the vortex separator filtration enters the secondary water tank by the clean liquid outlet. The bottom of primary water tank is conical, and is equipped with blowdown, impurity deposited in the bottom of primary water tank can naturally slide under the action of its gravity and converge to the blowdown at the lowest point of cone bottom, solve the problem of the hidden corner that is difficult to clean of traditional rectangular water tank.

Description

Technical Field

[0001] This utility model relates to a metalworking coolant filtration system, belonging to the field of machining technology. Background Technology

[0002] In the field of mechanical manufacturing and processing, during the grinding process, intense friction occurs between the grinding wheel and the workpiece, generating not only a large amount of grinding debris but also a significant amount of grinding heat. This grinding heat accelerates wheel wear, reduces its lifespan, and increases processing costs. It also affects the dimensional and shape accuracy of the workpiece. To effectively control grinding temperature rise and reduce friction, coolant is typically used for cooling. However, during the cooling process, a large number of fine grinding debris mixes into the coolant, forming contaminated, chip-laden coolant.

[0003] Current technologies commonly employ magnetic roller paper belt filters to purify contaminated grinding fluid containing grinding debris. However, in addition to ferrous grinding debris, the coolant also contains a large amount of non-ferrous grinding debris, such as aluminum and copper shavings. These shavings, due to their small size or weak magnetism, cannot be completely attracted by the magnetic roller. Over time, these unfiltered grinding debris gradually settle at the bottom of the tank. To ensure the normal operation of the machine tool and the quality of the workpiece, workers need to regularly clean the settled grinding debris from the bottom of the tank. However, existing tanks have dead corners where debris can accumulate, making it impossible to completely remove the settled grinding debris.

[0004] Furthermore, the working principle of the magnetic roller paper belt filter is as follows: the wastewater containing impurities first flows through the rotating magnetic roller, where ferromagnetic chips are separated by magnetic attraction; subsequently, the wastewater flows through the filter paper belt, where the filter paper intercepts fine non-ferromagnetic grinding chips and other impurities. Impurities continuously accumulate on the surface of the filter paper, eventually causing blockage. At this point, the dirty filter paper needs to be discarded and replaced with a clean filter paper belt. Although magnetic roller paper belt filters are widely used, when processing coolant from grinding machines, the extremely fine grinding chips easily penetrate the magnetic roller area and quickly clog the filter paper. As a disposable consumable, the filter paper needs frequent replacement to maintain filtration efficiency. This results in a huge consumption of filter paper, significantly increasing the filtration costs of the equipment.

[0005] Therefore, a metalworking coolant filtration system that can effectively solve the above problems is needed. Utility Model Content

[0006] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0007] The technical solution provided by this utility model is as follows: A metalworking coolant filtration system includes a primary water tank, a secondary water tank, a magnetic separation device, a vortex separator, a refrigeration unit, a magnetic separation lift pump, and a vortex separation lift pump. The bottom of the primary water tank is conical, and the bottom of the primary water tank is also provided with a drain outlet for discharging deposited impurities. The magnetic separation lift pump is used to pump the coolant in the primary water tank to the magnetic separation device. The outlet of the magnetic separation device is connected to the secondary water tank. The vortex separation lift pump is used to pump the coolant in the secondary water tank to the vortex separator. The vortex separator includes a clean liquid outlet, and the clean liquid filtered by the vortex separator enters the secondary water tank through the clean liquid outlet.

[0008] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: The bottom of the primary water tank is designed as a cone shape, and a dedicated drain outlet is provided. Impurities deposited at the bottom of the primary water tank can naturally slide down and converge at the drain outlet at the lowest point of the cone under their own gravity. By periodically or automatically opening the drain valve, rapid, thorough, and residue-free centralized discharge can be achieved, completely solving the problem of hard-to-clean debris-laden corners in traditional rectangular water tanks. The system of this utility model also adopts a two-stage filtration mechanism combining a magnetic separation device and a vortex separator. The magnetic separation device is mainly used to treat ferrous grinding debris in the primary water tank, while the vortex separator only treats non-ferrous grinding debris in the secondary water tank. Because the vortex separator only treats non-ferrous grinding debris, the maintenance frequency is low. Furthermore, the refrigeration unit can precisely control the temperature of the filtered coolant, reducing thermal deformation and extending the tool life. Using the coolant filtration system of this utility model, coolant purification can be achieved, allowing for recycling and reducing waste liquid discharge.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the magnetic separation device includes a reducer, a magnetic separation box, a magnetic roller, a rubber roller, an arc-shaped guide plate, a scraper, and a sludge collection box. The magnetic roller and the rubber roller are rotatably mounted in the magnetic separation box, and the axes of the magnetic roller and the rubber roller are parallel. The arc-shaped guide plate is located below the magnetic roller and is coaxial with the magnetic roller. The reducer is connected to the magnetic roller and can drive the magnetic roller to perform circular motion. The magnetic separation box is provided with an inlet and an outlet. The inlet is connected to the magnetic separation booster pump through a pipe, and the outlet is connected to the secondary water tank. One end of the scraper is attached to the outer surface of the magnetic roller, and the other end extends obliquely downward to the sludge collection box.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the magnetic separation device of this utility model adsorbs magnetic materials through magnetic rollers, without the need to consume consumables, and only requires periodic cleaning of the iron filings adsorbed on the magnetic rollers; the iron filings adsorbed by the magnetic separator can be automatically detached by the demagnetizing device, and the cleaning cycle is longer than that of the filter screen.

[0012] Furthermore, the inlet of the magnetic separator is also provided with an overflow device, which includes an overflow box. The overflow box is provided with a vertical partition and a horizontal partition. The vertical partition and the horizontal partition are arranged in an L-shape to divide the overflow box into an inlet area and an overflow area. The inlet area is connected to the magnetic separator booster pump through a pipeline, and the overflow area is connected to the primary water tank.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the overflow device divides the overflow box into an inlet area and an overflow area through vertical and horizontal partitions. When the flow rate of the coolant pumped by the magnetic separation booster pump is too large, the excess coolant can flow back to the primary water tank from the overflow area, thus avoiding the magnetic separation device from not being able to handle the situation in time due to excessive flow.

[0014] Furthermore, the magnetic roller has multiple tile-shaped magnetic materials arranged in a circular array.

[0015] The beneficial effect of adopting the above-mentioned further solution is that multiple tile-shaped magnetic materials are arranged in a ring array on the magnetic roller, which can increase the magnetic adsorption area on the surface of the magnetic roller, improve the adsorption capacity for iron grinding debris, and enable more iron grinding debris to be adsorbed during the rotation of the magnetic roller.

[0016] Furthermore, the vortex separator includes a conical cylinder, a sedimentation tank, and a slag receiving box. The purified liquid outlet is located at the upper end of the conical cylinder, the lower end of the conical cylinder has an underflow port, and the top side of the conical cylinder has a liquid inlet. The liquid inlet is connected to the vortex separator booster pump. The purified liquid outlet is connected to the secondary water tank through a purified liquid pipe. The sedimentation tank is located below the underflow port. A conduit is inserted in the sedimentation tank, and the bottom outlet of the conduit is connected to the primary water tank. The slag receiving box is located on one side of the sedimentation tank and is used to receive impurities transported from the sedimentation tank.

[0017] The beneficial effects of adopting the above-described further solution are that the vortex separator has a high-efficiency separation capability, and the vortex booster pump can directly deliver the coolant from the secondary water tank to the vortex separator without the need for additional filtration through a filter screen. Furthermore, the vortex separator itself does not rely on consumable filter media; its performance can be restored simply by periodically cleaning the accumulated impurities inside.

[0018] Furthermore, the side wall of the sedimentation tank near the slag receiving box is an inclined side wall.

[0019] The advantage of adopting the above-mentioned further solution is that tools, such as rakes, can be used to scrape impurities in the sedimentation tank into the slag collection box, reducing the residue of impurities in the sedimentation tank.

[0020] Furthermore, the magnetic separation pump is equipped with a stirring shaft, and the stirring shaft is equipped with blades.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the stirring shaft and blades installed on the magnetic separation lift pump can stir the coolant in the primary water tank while pumping the coolant, so that the impurities in the coolant are more evenly distributed, avoiding the local accumulation of impurities in the primary water tank, ensuring that the magnetic separation lift pump can draw coolant evenly, and improving the processing effect of the magnetic separation device on impurities.

[0022] Furthermore, it also includes an oil-water separator, which is installed on the secondary water tank to separate the liquid in the secondary water tank.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the oil-water separator is installed on the secondary water tank, which can further separate the oil in the liquid in the secondary water tank, making the coolant purer.

[0024] Furthermore, it also includes a liquid level alarm, which is installed on the primary water tank.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the liquid level alarm is installed on the primary water tank, which can monitor the liquid level in the primary water tank in real time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the metalworking coolant filtration system of this utility model;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the metalworking coolant filtration system of this utility model from another perspective;

[0029] Figure 3 This is a front view of the metalworking coolant filtration system of this utility model;

[0030] Figure 4 For the present utility model Figure 3 The left view;

[0031] Figure 5 For the present utility model Figure 3 Top view;

[0032] Figure 6 This is a three-dimensional structural diagram of the magnetic separation device of this utility model;

[0033] Figure 7 This is a three-dimensional sectional view of the magnetic separation device of this utility model;

[0034] Figure 8 This is a three-dimensional structural diagram of the vortex separator of this utility model;

[0035] Figure 9 This is a front view of the vortex separator of this utility model;

[0036] Figure 10 For the present utility model Figure 9 CC-direction sectional view;

[0037] In the diagram, 1. Primary water tank; 2. Secondary water tank; 3. Magnetic separation device; 301. Reducer; 302. Magnetic separator housing; 303. Magnetic roller; 304. Rubber roller; 305. Arc-shaped guide plate; 306. Scraper; 307. Sludge collection tank; 308. Overflow pipe; 4. Vortex separator; 401. Conical cylinder; 402. Sedimentation tank; 403. Slag receiving box; 404. Sloping side wall; 405. Clean liquid pipe; 406. Clean liquid outlet; 407. Bottom outlet; 408. Liquid inlet; 409. Conduit; 5. Refrigeration unit; 6. Magnetic separation lift pump; 7. Vortex separation lift pump; 8. Overflow device; 801. Overflow box; 802. Vertical partition; 803. Horizontal partition; 9. Oil-water separator; 10. Liquid level alarm. Detailed Implementation

[0038] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0039] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0040] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0041] like Figures 1-5 As shown, a metalworking coolant filtration system includes a primary water tank 1, a secondary water tank 2, a magnetic separator 3, a vortex separator 4, a refrigeration unit 5, a magnetic separation lift pump 6, and a vortex separation lift pump 7. The bottom of the primary water tank 1 is conical, and a drain outlet is provided at the bottom of the primary water tank 1 for discharging deposited impurities. The magnetic separation lift pump 6 pumps the coolant in the primary water tank 1 to the magnetic separator 3. The outlet of the magnetic separator 3 is connected to the secondary water tank 2. The vortex separation lift pump 7 pumps the coolant in the secondary water tank 2 to the vortex separator 4. The vortex separator 4 includes a clean liquid outlet 406, which is connected to the secondary water tank 2 through a clean liquid pipe 405. The clean liquid filtered by the vortex separator 4 enters the secondary water tank 2 through the clean liquid outlet 406.

[0042] In addition, in this embodiment, the primary water tank 1 and the secondary water tank 2 are arranged side by side, the magnetic separation device 3 is arranged close to the primary water tank 1, the vortex separator 4 is arranged close to the secondary water tank 2, the magnetic separation lift pump 6 is arranged above the primary water tank 1, and the vortex separation lift pump 7 is arranged above the secondary water tank.

[0043] like Figure 6 and Figure 7As shown, the magnetic separation device 3 includes a reducer 301, a magnetic separation box 302, a magnetic roller 303, a rubber roller 304, an arc-shaped guide plate 305, a scraper 306, and a sludge collection box 307. The magnetic roller 303 and the rubber roller 304 are rotatably installed inside the magnetic separation box 302, and the axes of the magnetic roller 303 and the rubber roller 304 are parallel. The arc-shaped guide plate 305 is located below the magnetic roller 303 and is coaxial with the magnetic roller 303. The reducer 301 is connected to the magnetic roller 303 and can drive the magnetic roller 303 to perform circular motion. The magnetic separation box 302 is provided with an inlet and an outlet. The inlet is connected to the magnetic separation lift pump 6 through a pipe, and the outlet is connected to the secondary water tank 2. One end of the scraper 306 is attached to the outer surface of the magnetic roller 303, and the other end extends obliquely downward to the sludge collection box 307. During operation, the reducer 301 drives the magnetic roller 303 in a circular motion. Coolant containing powdery magnetic impurities enters the magnetic separator 302, where the impurities are adsorbed onto the outer wall of the magnetic roller 303. An arc-shaped guide plate 305, concentric with the magnetic roller 303, is installed inside the separator to maximize the adsorption of magnets in the coolant onto the magnetic roller 303. The liquid is then squeezed out by the rubber roller 304, and the impurities are separated from the magnetic roller 303 by the scraper 306, falling into the collection tank 307. This magnetic separation device 3 uses the magnetic roller 303 to adsorb magnetic materials, requiring no consumables; only periodic cleaning of the iron filings adsorbed on the magnetic roller 303 is needed. The iron filings adsorbed by the magnetic separator can be automatically removed by a demagnetizing device, resulting in a longer cleaning cycle than filters.

[0044] An overflow device 8 is also provided at the liquid inlet of the magnetic separator 302. The overflow device 8 includes an overflow tank 801, which contains a vertical partition 802 and a horizontal partition 803 arranged in an L-shape, dividing the overflow tank 801 into an inlet area and an overflow area. The inlet area is connected to the magnetic separator booster pump 6 via a pipe, and the overflow area is connected to the primary water tank 1. The overflow device 8 divides the overflow tank 801 into an inlet area and an overflow area through the vertical partition 802 and the horizontal partition 803. When the flow rate of the coolant pumped by the magnetic separator booster pump 6 is too large, the excess coolant can flow back to the primary water tank 1 from the overflow area through the overflow pipe 308, avoiding the magnetic separator 3 from being unable to handle the situation in time due to excessive flow.

[0045] Multiple tile-shaped magnetic materials are arranged in a ring array on the magnetic roller 303, which can increase the magnetic adsorption area on the surface of the magnetic roller 303, improve the adsorption capacity for iron grinding debris, and enable more iron grinding debris to be adsorbed during the rotation of the magnetic roller 303.

[0046] like Figures 8-10As shown, the vortex separator 4 includes a conical cylinder 401, a sedimentation tank 402, and a slag receiving box 403. The purified liquid outlet 406 is located at the upper end of the conical cylinder 401, and the lower end of the conical cylinder 401 is provided with an underflow port 407. A liquid inlet 408 is provided on one side of the top of the conical cylinder 401. The liquid inlet 408 is connected to the vortex separator booster pump 7. The purified liquid outlet is connected to the secondary water tank 2 through a purified liquid pipe 405. The sedimentation tank 402 is located below the underflow port 407. A conduit 409 is inserted into the sedimentation tank 402. The bottom outlet of the conduit 409 is connected to the primary water tank 1. The slag receiving box 403 is located on one side of the sedimentation tank 402 and is used to receive impurities transported from the sedimentation tank 402. During operation, the coolant in the secondary water tank 2 is injected at high speed into the conical cylinder 401 by the vortex separator booster pump 7 at a certain pressure through the inlet along the tangential direction. This causes the liquid to generate an external vortex within the conical cylinder 401. Under the action of centrifugal force, solid particles in the liquid are thrown towards the inner wall of the conical cylinder 401. Driven by gravity and the liquid, they are discharged from the bottom outlet 407 along the inner wall. The separated clean liquid reaches the bottom of the conical cylinder 401 and then spirals upward along the axis of the conical cylinder 401, forming an internal vortex. It is then discharged into the secondary water tank 2 through the clean liquid outlet 406 of the vortex separator, thereby achieving the separation of dirty liquid and clean liquid.

[0047] The vortex separator 4 possesses high-efficiency separation capabilities and high separation precision, capable of separating 98% of particles larger than 30μm. The vortex booster pump 7 can directly deliver coolant from the secondary water tank 2 to the vortex separator 4, eliminating the need for additional filtration. Furthermore, the vortex separator 4 itself does not rely on consumable filter media; its performance can be restored simply by periodically cleaning accumulated impurities.

[0048] The side wall of the sedimentation tank 402 near the slag receiving box 403 is an inclined side wall 404. Tools, such as rakes, can be used to scrape impurities in the sedimentation tank 402 into the slag receiving box 403, reducing the residue of impurities in the sedimentation tank 402.

[0049] The magnetic separation pump 6 is equipped with a stirring shaft, and the stirring shaft has blades. The stirring shaft and blades on the magnetic separation pump 6 can stir the coolant in the primary water tank 1 while pumping the coolant, so that the impurities in the coolant are more evenly distributed, avoiding the local accumulation of impurities in the primary water tank 1, ensuring that the magnetic separation pump 6 can draw coolant evenly, and improving the processing effect of the magnetic separation device 3 on impurities.

[0050] The filtration system also includes an oil-water separator 9 and a level alarm 10. The oil-water separator 9 is installed on the secondary water tank 2 to separate the liquid in the secondary water tank 2. The oil-water separator 9, installed on the secondary water tank 2, can further separate the oil from the liquid in the secondary water tank 2, making the coolant purer. The level alarm 10 is installed on the primary water tank 1 and can monitor the liquid level in the primary water tank 1 in real time.

[0051] The working principle of this metalworking coolant filtration system is as follows:

[0052] The coolant produced during metal processing first flows into the primary water tank 1. Since the bottom of the primary water tank 1 is designed to be conical, after the coolant flows into the primary water tank 1, the impurities in the coolant gradually sink under their own gravity and naturally slide down and collect at the drain port at the lowest point of the cone.

[0053] The magnetic separation booster pump 6 starts, and its stirring shaft and blades agitate the coolant in the primary water tank 1, making the impurities in the coolant more evenly distributed and preventing local accumulation of impurities. Then, the magnetic separation booster pump 6 pumps the coolant in the primary water tank 1 to the magnetic separation box 302 of the magnetic separation device 3.

[0054] The reducer 301 drives the magnetic roller 303 to rotate. Coolant containing powdery magnetic impurities enters the magnetic separator 302. Under the strong magnetic force of the magnetic roller 303, the impurities are attracted to the outer wall of the roller. After being crushed by the rubber roller 304, the liquid entrained by the impurities is squeezed out. Then, the scraper 306 separates the impurities from the magnetic roller 303, causing them to fall into the collection tank 307. The coolant, after magnetic separation, flows out from the outlet of the magnetic separator 302 and enters the secondary water tank 2.

[0055] The vortex booster pump 7 injects coolant from the secondary water tank 2 at high speed and tangentially through the inlet 408 into the conical cylinder 401 of the vortex separator 4 under a certain pressure. The coolant generates an external vortex within the conical cylinder 401, and solid particles in the liquid are thrown towards the inner wall of the conical cylinder 401 under centrifugal force. Driven by gravity and the liquid, they are discharged along the inner wall through the bottom outlet 407 and enter the sedimentation tank 402. The side wall of the sedimentation tank 402 near the slag receiving box 403 is a sloping sidewall 404. Workers can use tools, such as rakes, to scrape impurities from the sedimentation tank 402 into the slag receiving box 403, reducing the residue of impurities in the sedimentation tank 402. The bottom outlet of the conduit 409 inserted in the sedimentation tank 402 is connected to the primary water tank 1, and some coolant will flow back to the primary water tank 1 through the conduit 409.

[0056] After separation, the clean liquid reaches the bottom of the conical cylinder 401 and spirals upward along the axis of the conical cylinder 401, forming an internal vortex. It is discharged from the clean liquid outlet 406 of the vortex separator 4 and enters the secondary water tank 2 through the clean liquid pipe 405, thus realizing the separation of dirty liquid and clean liquid.

[0057] This invention designs the bottom of the primary water tank 1 as a cone shape and provides a dedicated drain outlet. Impurities deposited at the bottom of the primary water tank 1 can naturally slide down under their own gravity and converge at the drain outlet at the lowest point of the cone. By periodically or automatically opening the drain valve, rapid, thorough, and residue-free centralized discharge can be achieved, completely solving the problem of hard-to-clean debris-accumulating dead corners that exist in traditional rectangular water tanks. The system of this invention also adopts a two-stage filtration mechanism of magnetic separation device 3 and vortex separator 4. Magnetic separation device 3 is mainly used to treat ferrous grinding debris in the primary water tank 1 and does not require consumables, reducing filtration costs. Vortex separator 4 only treats non-ferrous grinding debris in the secondary water tank 2. Since vortex separator 4 is only used to treat non-ferrous grinding debris, the maintenance frequency is low. In addition, the refrigeration unit 5 can accurately control the temperature of the filtered coolant, reduce thermal deformation, and extend the service life of the cutting tools. Using the coolant filtration system of this invention, coolant purification can be achieved, allowing for recycling and reducing waste liquid discharge.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metalworking fluid filtration system characterized by, The system includes a primary water tank (1), a secondary water tank (2), a magnetic separation device (3), a vortex separator (4), a refrigeration unit (5), a magnetic separation lift pump (6), and a vortex separation lift pump (7). The bottom of the primary water tank (1) is conical, and the bottom of the primary water tank (1) is also provided with a drain outlet. The magnetic separation lift pump (6) is used to pump the coolant in the primary water tank (1) to the magnetic separation device (3). The outlet of the magnetic separation device (3) is connected to the secondary water tank (2). The vortex separation lift pump (7) is used to pump the coolant in the secondary water tank (2) to the vortex separator (4). The vortex separator (4) includes a clean liquid outlet (406). The clean liquid filtered by the vortex separator (4) enters the secondary water tank (2) through the clean liquid outlet (406).

2. The metalworking fluid filtration system of claim 1, wherein, The magnetic separation device (3) includes a reducer (301), a magnetic separation box (302), a magnetic roller (303), a rubber roller (304), an arc-shaped guide plate (305), a scraper (306), and a sludge collection box (307). The magnetic roller (303) and the rubber roller (304) are rotatably installed inside the magnetic separation box (302), and the axes of the magnetic roller (303) and the rubber roller (304) are parallel. The arc-shaped guide plate (305) is located below the magnetic roller (303) and parallel to the axis of the rubber roller (304). The magnetic roller (303) is coaxial; the reducer (301) is connected to the magnetic roller (303) and can drive the magnetic roller (303) to make circular motion; the magnetic separator (302) is provided with an inlet and an outlet, the inlet is connected to the magnetic separator pump (6) through a pipe, the outlet is connected to the secondary water tank (2), one end of the scraper (306) is attached to the outer surface of the magnetic roller (303), and the other end extends obliquely downward to the sludge collection tank (307).

3. The metalworking fluid filtration system of claim 2, wherein, The magnetic separator (302) is also provided with an overflow device (8) at the liquid inlet. The overflow device (8) includes an overflow box (801). The overflow box (801) is provided with a vertical partition (802) and a horizontal partition (803). The vertical partition (802) and the horizontal partition (803) are arranged in an L-shape to divide the overflow box (801) into an inlet area and an overflow area. The inlet area is connected to the magnetic separator booster pump (6) through a pipe, and the overflow area is connected to the primary water tank (1).

4. The metalworking fluid filtration system of claim 3, wherein, The magnetic roller (303) has multiple tile-shaped magnetic materials arranged in a ring array.

5. The metalworking fluid filtration system of any of claims 1-4, wherein, The vortex separator (4) includes a conical cylinder (401), a sedimentation tank (402), and a slag receiving box (403). The clean liquid outlet (406) is located at the upper end of the conical cylinder (401). The lower end of the conical cylinder (401) is provided with an underflow port (407). The top side of the conical cylinder (401) is provided with an inlet port (408). The inlet port (408) is connected to the vortex booster pump (7). The clean liquid outlet is connected to the secondary water tank (2) through a clean liquid pipe (405). The sedimentation tank (402) is located below the underflow port (407). A conduit (409) is inserted in the sedimentation tank (402). The bottom outlet of the conduit (409) is connected to the primary water tank (1). The slag receiving box (403) is located on one side of the sedimentation tank (402) and is used to receive impurities transported from the sedimentation tank (402).

6. The metalworking fluid filtration system of claim 5, wherein, The side wall of the sedimentation tank (402) near the slag receiving box (403) is an inclined side wall (404).

7. The metal working fluid filtration system of claim 1, wherein, The magnetic booster pump (6) is equipped with a stirring shaft, and the stirring shaft is equipped with blades.

8. The metal working fluid filtration system of claim 1, wherein, It also includes an oil-water separator (9), which is installed on the secondary water tank (2) to separate the liquid in the secondary water tank (2).

9. The metal working fluid filtration system of claim 1, wherein, It also includes a liquid level alarm (10), which is installed on the primary water tank (1).

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