Cutting fluid regeneration device

Abstract

The utility model provides a cutting fluid regeneration device which solves the technical problems that cutting fluid subjected to precipitation and filtration treatment by an existing device contains bacteria and is easy to deteriorate, and the secondary utilization effect of the cutting fluid is influenced. The device comprises a precipitation device, a filtering device, a sterilization device and a sterilization container, the sterilization device is provided with a sterilization lamp and a sterilization aeration device, and a cutting fluid sterilization area is arranged in the sterilization container; the sterilization lamp is installed in the cutting fluid sterilization area, an aeration opening, a first liquid inlet and a first liquid outlet are formed in the container wall of the sterilization container, an air conveying pipe of the sterilization device is communicated with the aeration opening, and the aeration opening is communicated with the cutting fluid sterilization area; at least two layers of tower plates are mounted in the cutting fluid sterilization area from top to bottom, and every two adjacent layers of tower plates are arranged in a staggered manner at intervals; the method can be widely applied to the technical field of cutting fluid waste liquid treatment.

Description

Technical Field

[0001] This application relates to the technical field of cutting fluid waste liquid treatment, and particularly relates to a cutting fluid regeneration device. Background Art

[0002] Cutting fluid plays the functions of cooling, lubricating, anti-corrosion and cleaning in the machining of metals. Used cutting fluid contains metal chips, microorganisms, and even contains miscellaneous oil, with complex components, and it is very easy to deteriorate, endangering the physical health of operators.

[0003] In the prior art, during the process of machining metals by a numerically controlled lathe, in order to reduce consumption and effectively improve the reuse rate of cutting fluid, methods such as precipitation and filtration are adopted for treatment. For example, the utility model with the publication number CN212095547U discloses a cutting fluid recovery device for a numerically controlled machine tool, including: a first filtering mechanism, including a first receiving plate, a first collecting plate, and a first filter screen. A first receiving surface is formed on the first receiving plate, the first collecting plate has a first collecting surface, and the first filter screen is connected to the first collecting surface; a precipitation mechanism, including a material receiving hopper, a precipitation tank and an overflow pool. The material receiving hopper is connected to the first collecting surface, one end of the precipitation tank is communicated with the material receiving hopper, and the other end is communicated with the overflow pool; a recovery mechanism. By the cooperation of the inclined first receiving surface and the first collecting surface of the present utility model, the cutting fluid can pass through the first filter screen and enter the precipitation device, while some of the metal chips slide from the first receiving surface to the first collecting surface, and accumulate on the first collecting surface under the action of friction and the blockage of the first filter screen, which improves the convenience of cleaning, and some small particle metal chips enter the precipitation tank to be precipitated, which avoids small particle metal chips in the recycled cutting fluid.

[0004] However, in practical applications, the technical problem of the above utility model is that after the used cutting fluid is recovered through precipitation and filtration treatment, although large particle and small particle metal chips are removed, since the used cutting fluid contains bacteria, it is easy to deteriorate and produce peculiar smell, which greatly affects the secondary utilization effect of the cutting fluid. Summary of the Invention

[0005] The purpose of the present utility model is to solve the above technical deficiencies, and provide a cutting fluid regeneration device to remove bacteria in the cutting fluid and ensure the secondary utilization effect of the cutting fluid.

[0006] For this reason, the present utility model provides a cutting fluid regeneration device, which includes a precipitation device and a filtration device, and further includes a sterilization device and a sterilization container. The sterilization device is provided with a sterilization lamp and a sterilization aeration device, and a cutting fluid sterilization area is provided in the sterilization container; the sterilization lamp is installed in the cutting fluid sterilization area, and aeration ports, a first liquid inlet and a first liquid outlet are opened on the container wall of the sterilization container. The air delivery pipe of the sterilization device is communicated with the aeration port, and the aeration port is communicated with the cutting fluid sterilization area.

[0007] Preferably, at least two layers of trays are installed from top to bottom in the cutting fluid sterilization area, and the adjacent two layers of trays are arranged at intervals in a staggered manner; the sterilization lamp is installed on the trays.

[0008] Preferably, the position of the aeration port is arranged below the tray.

[0009] Preferably, a liquid outlet pipe is communicated with the first liquid outlet, and a first valve is installed on the liquid outlet pipe.

[0010] Preferably, the sterilization lamp is an ultraviolet sterilization lamp or an infrared sterilization lamp.

[0011] Preferably, the sterilization aeration device is an oxygen generator or an ozone generator.

[0012] Preferably, the precipitation device is provided with a sedimentation tank, a partition plate is arranged in the sedimentation tank, the partition plate divides the sedimentation tank into a first sedimentation tank and a second sedimentation tank, a second liquid inlet is arranged on the pool wall of the first sedimentation tank, a second liquid outlet is arranged on the partition plate, the first sedimentation tank is communicated with the second sedimentation tank through the second liquid outlet, a third liquid outlet is arranged on the pool wall of the second sedimentation tank, and the third liquid outlet is communicated with the first liquid inlet;

[0013] The filtering device is provided with a first filter screen and a second filter screen. The position of the second liquid inlet is arranged below the first filter screen, and the position of the second liquid outlet is arranged above the first filter screen; the second filter screen is installed at the third liquid outlet, and the mesh of the second filter screen is smaller than that of the first filter screen.

[0014] Preferably, the filtering device is further provided with a third filter screen, the third filter screen is installed in the third liquid outlet, and the third filter screen is arranged at intervals behind the second filter screen; a magnet is fixedly placed between the second filter screen and the third filter screen.

[0015] Preferably, the second filter screen is of a concave structure, the opening size of the concave structure of the second filter screen is larger than the third liquid outlet, and the edge of the second filter screen faces and is detachably connected to the pool side wall of the second sedimentation tank, and a filling cavity is formed between the second filter screen and the pool side wall of the second sedimentation tank; the magnet is magnetic particle, and the magnets are stacked in the filling cavity.

[0016] Preferably, the second filter screen is a hemispherical filter screen or a semi-elliptical spherical filter screen. The upper part of the second filter screen is provided with mesh holes, the lower part of the second filter screen is a closed concave surface, a magnet is fixedly placed between the closed concave surface of the second filter screen and the third filter screen, and the particle size of the magnet is larger than the mesh of the third filter screen.

[0017] Preferably, a fourth filter screen is installed at the second liquid outlet. The pore size of the fourth filter screen is between the pore sizes of the first filter screen and the second filter screen, and the pores at the lowest position of the fourth filter screen are higher than the pores at the highest position of the second filter screen.

[0018] The beneficial effects of the present utility model are as follows: The present utility model provides a cutting fluid regeneration device, which has a simple structure and is convenient to operate. The cutting fluid after sedimentation and filtration treatment is continuously injected into the sterilization container from the first liquid inlet. After being sterilized in the cutting fluid sterilization area, it continuously flows out from the first liquid outlet, so that the cutting fluid is in a dynamic process of continuous flow sterilization treatment in the sterilization container. During this process, the sterilization effect of the sterilization lamp is inevitably weakened. The sterilization aeration device is used to aerate and sterilize on a large scale in the cutting fluid sterilization area, making up for the deficiency of the sterilization lamp due to the flow of the cutting fluid, and synergistically and effectively improving the sterilization effect. Through the dual synergistic sterilization of the sterilization lamp and aeration, bacteria in the cutting fluid are removed, effectively preventing the cutting fluid from deteriorating and generating peculiar smells, improving the recycling rate of the metal processing cutting fluid, and ensuring the secondary utilization effect of the cutting fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is Figure 1 a schematic structural diagram of the enlarged view of part A shown in the figure.

[0022] Reference numerals in the figure: 1. Cutting fluid sterilization area, 2. Aeration port, 3. First liquid inlet, 4. First liquid outlet, 5. Air delivery pipe, 6. Tray, 7. Liquid outlet pipe, 8. First valve, 9. Ultraviolet sterilization lamp, 10. Oxygen generator, 11. Sedimentation tank, 12. Partition board, 13. First sedimentation tank, 14. Second sedimentation tank, 15. Second liquid inlet, 16. Second liquid outlet, 17. Third liquid outlet, 18. First filter screen, 19. Second filter screen, 20. Third filter screen, 21. Magnet, 22. Filling cavity, 23. First box cover, 24. Second box cover, 25. Second valve, 26. Liquid guiding pipe, 27. Liquid inlet pipe, 28. Sterilization container, 29. Fourth filter screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application. The methods used in the present utility model are all conventional methods without special regulations; the raw materials and devices used are all conventional commercially available products without special regulations.

[0024] As shown by Figure 1 and Figure 2 , the present utility model provides a cutting fluid regeneration device, which includes a precipitation device and a filtration device, and further includes a sterilization device and a sterilization container 28. Among them, the sterilization device is provided with an ultraviolet sterilization lamp 9 and an oxygen generator 10, and a cutting fluid sterilization area 1 is provided in the sterilization container 28. The sterilization lamp is installed in the cutting fluid sterilization area 1. Aeration ports 2, a first liquid inlet 3 and a first liquid outlet 4 are opened on the container wall of the sterilization container 28. The gas delivery pipe 5 of the oxygen generator 10 is connected to the aeration port 2, and the aeration port 2 is connected to the cutting fluid sterilization area 1.

[0025] When the present utility model is in use, turn on the ultraviolet sterilization lamp 9 and start the oxygen generator 10 to complete the preparatory work before cutting fluid sterilization. The used cutting fluid is subjected to precipitation and filtration treatment by the prior art and then injected into the sterilization container 28 through the first liquid inlet 3 and enters the cutting fluid sterilization area 1. After being subjected to ultraviolet broad-spectrum sterilization treatment by the ultraviolet sterilization lamp 9, a large amount of pure oxygen generated by the oxygen generator 10 is subjected to aeration to kill anaerobic bacteria through the aeration port 2 via the gas delivery pipe 5. After the sterilization treatment is completed, it flows out from the first liquid outlet 4 to complete the regeneration process of the cutting fluid.

[0026] The structure of the present utility model is simple and the operation is convenient. During the use process, the cutting fluid after precipitation and filtration treatment is continuously injected into the sterilization container 28 from the first liquid inlet 3. After the sterilization treatment is completed in the cutting fluid sterilization area 1, it continuously flows out from the first liquid outlet 4, so that the cutting fluid is in a dynamic process of continuous flow sterilization treatment in the sterilization container 28, improving the sterilization efficiency. During this process, the sterilization effect of the ultraviolet sterilization lamp 9 is inevitably weakened. Using pure oxygen for large-area aeration sterilization in the cutting fluid sterilization area 1 makes up for the deficiency of ultraviolet sterilization caused by the flow of the cutting fluid, and effectively improves the sterilization effect through synergy. Through dual synergistic sterilization of ultraviolet and aeration, bacteria in the cutting fluid are removed, effectively preventing the cutting fluid from deteriorating and generating odors, improving the recycling rate of metal processing cutting fluid, and ensuring the secondary utilization effect of the cutting fluid.

[0027] In order to further improve the cutting fluid sterilization effect, as shown by Figure 1As shown, preferably at least two trays 6 are installed vertically in the cutting fluid sterilization area 1, and the adjacent two trays 6 are arranged at intervals in a staggered manner to extend the flow path of the cutting fluid sterilization. To improve the ultraviolet sterilization effect during the flow of the cutting fluid on the tray 6, the ultraviolet sterilization lamp 9 is more preferably installed on the tray 6, and the quantity is arranged according to the actual situation. When multiple ultraviolet sterilization lamps 9 are set, they are installed at intervals on the tray 6.

[0028] To further improve the sterilization effect of the cutting fluid, Figure 1 As shown, the position of the aeration port 2 is preferably set below the tray 6, and the tray 6 plays a role in blocking to prevent a large number of aeration bubbles generated by the aeration port 2 from interfering with the ultraviolet rays emitted by the ultraviolet sterilization lamp 9. After the cutting fluid completes ultraviolet sterilization, it then completes aeration sterilization, receiving sterilization in stages and gradients to improve the sterilization effect.

[0029] To facilitate the smooth export of the sterilized cutting fluid from the sterilization container 28, Figure 1 As shown, the first liquid outlet 4 is preferably communicated with a liquid outlet pipe 7, and the sterilized cutting fluid flows out from the liquid outlet pipe 7 for reuse. A first valve 8 is installed on the liquid outlet pipe 7 to control the flow rate of the cutting fluid in the liquid outlet pipe 7. In addition, when the sterilization container 28 is idle, the first valve 8 can also be opened to flush the cleaning liquid into the sterilization container 28 from the outside through the liquid outlet pipe 7 to clean the impurities in the sterilization container 28 and complete backwashing; at the same time, the ultraviolet sterilization lamp 9 can also be turned on and the oxygen generator 10 can be started to perform ultraviolet and aeration sterilization treatments on the cleaning liquid in the sterilization container 28, and finally complete the sterilization treatment of the sterilization container 28 to prepare for the next sterilization of the cutting fluid. The first liquid outlet 4 and the aeration port 2 are preferably close to each other or set as a whole to further improve the above-mentioned backwashing effect.

[0030] To remove solid impurities such as metal chips in the cutting fluid and further improve the precipitation and filtration effects of the cutting fluid, Figure 1 、 Figure 2As shown in the figure, the sedimentation device of the present utility model preferably has a sedimentation tank 11. A partition 12 is provided in the sedimentation tank 11. The partition 12 divides the sedimentation tank 11 into a first sedimentation tank 13 and a second sedimentation tank 14. A second liquid inlet 15 is provided on the pool wall of the first sedimentation tank 13. The upper surface of the partition 12 serves as a second liquid outlet 16, that is, the partition 12 is an overflow partition; the first sedimentation tank 13 is communicated with the second sedimentation tank 14 through the second liquid outlet 16. A third liquid outlet 17 is provided on the pool wall of the second sedimentation tank 14. The third liquid outlet 17 is communicated with the first liquid inlet 3 through a liquid guide pipe 26; the filtering device is provided with a first filter screen 18 and a second filter screen 19. The position of the second liquid inlet 15 is arranged below the first filter screen 18, and the position of the second liquid outlet 16 is arranged above the first filter screen 18; the second filter screen 19 is installed at the third liquid outlet 17, and the mesh of the second filter screen 19 is smaller than that of the first filter screen 18.

[0031] During use, the used cutting fluid is continuously injected from the second liquid inlet 15. The liquid level of the cutting fluid in the first sedimentation tank 13 rises, passes upward through the first filter screen 18, filters out relatively coarse solid impurities such as metal chips, and then flows into the second sedimentation tank 14 from the second liquid outlet 16, where it is sedimented and processed. Then, it passes through the second filter screen 19 to filter out relatively fine solid impurities such as metal chips and flows out from the third liquid outlet 17, completing the sedimentation and filtration of the cutting fluid. Finally, the cutting fluid that has completed sedimentation and filtration is injected into the sterilization container 28 through the first liquid inlet 3 to complete the sterilization treatment.

[0032] In order to further remove finer solid impurities such as metal chips in the cutting fluid, Figure 2 As shown in the figure, the filtering device preferably further has a third filter screen 20. The third filter screen 20 is installed in the third liquid outlet 17. The third filter screen 20 is spaced behind the second filter screen 19; a magnet 21 is fixedly placed between the second filter screen 19 and the third filter screen 20. When the cutting fluid that has completed filtration through the second filter screen 19 passes through the magnet 21, the magnet 21 magnetically attracts solid impurities such as metal chips with magnetic seeds. In addition, the mesh size of the third filter screen 20 is preferably set to be smaller than that of the second filter screen 19 to further filter out solid impurities such as metal chips and improve the filtering effect of the cutting fluid. The magnet 21 is preferably a permanent magnet 21.

[0033] In order to further improve the magnetic impurity removal effect of the magnet 21, Figure 2As shown, the second filter screen 19 of the present utility model is preferably set as a concave structure. The opening size of the concave structure of the second filter screen 19 is larger than the third liquid outlet 17, and the edge of the second filter screen 19 faces and is detachably connected to the side wall of the second sedimentation tank 14. A filling cavity 22 is formed between the second filter screen 19 and the side wall of the second sedimentation tank 14; the magnet 21 is magnet 21 particles, usually spherical, and the magnet 21 is stacked in the filling cavity 22, and the gaps between the magnet 21 particles communicate with each other to form a channel with a net structure. The cutting fluid that has completed the filtration process through the second filter screen 19, when passing through the magnet 21, adopts the method of passing through the net-like gaps between the magnet 21 particles. On the one hand, it plays the role of magnetically attracting solid impurities with magnetic seeds, and on the other hand, the net-like gaps further filter and remove impurities from the cutting fluid to a certain extent.

[0034] The second filter screen 19 can be a hemispherical filter screen, that is, the concave structure of the second filter screen 19 is a hollow hemisphere, so as to increase the space of the filling cavity 22. The upper part of the second filter screen 19 is provided with mesh holes, and the lower part of the second filter screen 19 is a closed concave surface. The magnet 21 is fixedly placed between the closed concave surface of the second filter screen 19 and the third filter screen 20. The cutting fluid passes through the mesh-like gaps of the magnet 21 from the mesh holes of the second filter screen 19 above the magnet 21. The particle size of the magnet 21 is larger than the mesh holes of the third filter screen 20 to prevent the magnet 21 particles from escaping from the third filter screen 20 along with the cutting fluid. In addition, the magnetic force of the magnet 21 will also pass through the closed concave surface of the second filter screen 19, so that some solid impurities in the second sedimentation tank 14 are directly adsorbed on the back side of the closed concave surface of the second filter screen 19.

[0035] According to the concave structure of the second filter screen 19, the second filter screen 19 can also be a cylindrical filter screen with one side open and closed or provided with a filter screen, a semi-elliptical spherical filter screen, a cup-shaped filter screen, etc. The second filter screen 19 is preferably a backwashable filter screen, and more preferably a cylindrical backwashable filter screen.

[0036] In order to further improve the filtering effect of solid impurities such as metal chips in the cutting fluid, reduce the filtering burden of the second filter screen 19, and extend its service life, the second liquid outlet 16 is preferably installed with a fourth filter screen 29. The mesh size of the fourth filter screen 29 is between the mesh sizes of the first filter screen 18 and the second filter screen 19. The mesh holes at the lowest position of the fourth filter screen 29 are higher than the mesh holes at the highest position of the second filter screen 19, so as to avoid the phenomenon that the cutting fluid in the second sedimentation tank 14 flows back into the first sedimentation tank 13 from the second liquid outlet 16 when the liquid level of the cutting fluid in the second sedimentation tank 14 naturally rises to the second filter screen 19, resulting in a significant reduction in the filtering effect.

[0037] It should be noted that:

[0038] (1) In addition to using the ultraviolet germicidal lamp 9, the present utility model can also use germicidal lamps such as infrared germicidal lamps to replace it.

[0039] (2) In addition to using the oxygen generator 10, the present utility model can also use germicidal aeration devices such as ozone generators to replace it.

[0040] (3) The second liquid outlet 16 of the present utility model can not only be arranged on the upper surface of the partition plate 12, but also be opened on the plate body of the partition plate 12.

[0041] (4) The cutting fluid described in the present utility model is applied to the machining of metals, and the metals include alloy materials such as aluminum alloy. In actual use, to ensure the sterilization effect, the ultraviolet sterilization and oxygen exposure sterilization time of the aluminum alloy machining cutting fluid is usually not less than 40 minutes.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing 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. Therefore, it cannot be understood as a limitation to the present utility model. It should be noted that in the above embodiments, the "first", "second", "third", and "fourth" do not represent an absolute distinction relationship in terms of structure and / or function, nor do they represent the execution order of sequence, but are only for the convenience of description; the detachable connection methods include opening and closing connections such as threaded connections and snap connections.

[0043] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application, for example, the partition plate 12 divides the sedimentation tank 11 into a multi-stage sedimentation tank with three or more stages; the sterilization container 28 is a box structure with a first box cover 23; a second box cover 24 is added to the sedimentation tank 11 to form a box structure; the air delivery pipe 5 of the sterilization device is hermetically inserted into the aeration port 2 and extends into the cutting fluid sterilization area 1 for oxygen exposure sterilization; a second valve 25 for adjusting the flow rate is installed on the air delivery pipe 5; the third liquid outlet 17 and the first liquid inlet 3 are directly connected in a manner such as direct communication; the second liquid inlet 15 is connected with a liquid inlet pipe 27; the container wall of the sterilization container 28 is provided with a radiation protection layer, and the radiation protection layer is preferably tinfoil paper; according to the actual situation of the chip fluid itself, an existing oil-liquid separation structure or device is added to treat the chip fluid to separate the miscellaneous oil and the chip fluid to obtain the chip fluid with the miscellaneous oil removed; the tray 6 is an existing transparent material; in the sedimentation tank 11, the position of the partition plate 12 is set on the side close to the liquid guide pipe 26; the edges of the second filter screen 19 and the third filter screen 20 are connected and combined to form a spherical filter screen; the aeration port 2 is arranged above the tray 6, first performing oxygen exposure sterilization and then ultraviolet sterilization treatment, etc., shall all be included in the protection scope of the present application.

Claims

1. A cutting fluid regeneration device, which includes a precipitation device and a filtration device, is characterized in that, It also includes a sterilization device and a sterilization container (28). The sterilization device is provided with a sterilization lamp and a sterilization aeration device. A cutting fluid sterilization area (1) is provided in the sterilization container (28). The sterilization lamp is installed in the cutting fluid sterilization area (1). Aeration ports (2), a first liquid inlet (3) and a first liquid outlet (4) are formed in the container wall of the sterilization container (28). An air delivery pipe (5) of the sterilization device is communicated with the aeration port (2), and the aeration port (2) is communicated with the cutting fluid sterilization area (1). At least two layers of trays (6) are installed in the cutting fluid sterilization area (1) from top to bottom, and adjacent two layers of the trays (6) are arranged at intervals and staggered with each other.

2. The cutting fluid regeneration device according to claim 1, wherein The sterilization lamp is installed on the tray (6).

3. The cutting fluid regeneration device according to claim 2, characterized in that, The position of the aeration port (2) is arranged below the tray (6).

4. The cutting fluid regeneration device according to claim 1, characterized in that, A liquid outlet pipe (7) is communicated with the first liquid outlet (4), and a first valve (8) is installed on the liquid outlet pipe (7).

5. A cutting fluid regeneration device according to claim 1, characterized in that, The sterilization lamp is an ultraviolet sterilization lamp (9) or an infrared sterilization lamp; the sterilization aeration device is an oxygen generator (10) or an ozone generator.

6. A cutting fluid regeneration device according to any one of claims 1-5, characterized in that, The precipitation device is provided with a sedimentation tank (11). A partition plate (12) is provided in the sedimentation tank (11). The partition plate (12) divides the sedimentation tank (11) into a first sedimentation tank (13) and a second sedimentation tank (14). A second liquid inlet (15) is provided on the tank wall of the first sedimentation tank (13), and a second liquid outlet (16) is provided on the partition plate (12). The first sedimentation tank (13) is communicated with the second sedimentation tank (14) through the second liquid outlet (16). A third liquid outlet (17) is provided on the tank wall of the second sedimentation tank (14), and the third liquid outlet (17) is communicated with the first liquid inlet (3). The filtering device is provided with a first filter screen (18) and a second filter screen (19). The position of the second liquid inlet (15) is arranged below the first filter screen (18), and the position of the second liquid outlet (16) is arranged above the first filter screen (18). The second filter screen (19) is installed at the third liquid outlet (17), and the mesh of the second filter screen (19) is smaller than the mesh of the first filter screen (18).

7. The cutting fluid regeneration device according to claim 6, characterized in that, The filtering device is further provided with a third filter screen (20). The third filter screen (20) is installed in the third liquid outlet (17), and the third filter screen (20) is arranged at intervals behind the second filter screen (19). A magnet (21) is fixedly placed between the second filter screen (19) and the third filter screen (20).

8. A cutting fluid regeneration device according to claim 7, characterized in that, The second filter screen (19) is of a concave structure, the opening size of the concave structure of the second filter screen (19) is larger than that of the third liquid outlet (17), and the edge of the second filter screen (19) faces and is detachably connected to the pool side wall of the second sedimentation tank (14), and a filling cavity (22) is formed between the second filter screen (19) and the pool side wall of the second sedimentation tank (14); the magnet (21) is magnet particles, and the magnet (21) is stacked in the filling cavity (22).

9. The cutting fluid regeneration device according to claim 8, wherein The second filter screen (19) is a hemispherical filter screen or a semi-elliptical spherical filter screen. The upper part of the second filter screen (19) is provided with mesh holes, and the lower part of the second filter screen (19) is a closed concave surface. The magnet (21) is fixedly placed between the closed concave surface of the second filter screen (19) and the third filter screen (20), and the particle size of the magnet (21) is larger than the mesh holes of the third filter screen (20).

10. The cutting fluid regeneration device according to claim 6, characterized in that, A fourth filter screen (29) is installed at the second liquid outlet (16). The mesh size of the fourth filter screen (29) is between the mesh sizes of the first filter screen (18) and the second filter screen (19), and the mesh holes at the lowest position of the fourth filter screen (29) are higher than the mesh holes at the highest position of the second filter screen (19).

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