A cutting fluid centralized purification system

Abstract

The application relates to a cutting fluid centralized purification system and relates to the technical field of cutting fluid treatment. The purification system comprises a rack and a purification device. The purification device comprises a lower box body, filter cloth which is uniformly provided with aperture structures and sequentially comprises a coarse interception layer with a pore size of 50-100 mu m, a fine filtration layer with a pore size of 10-40 mu m and a high-temperature-resistant support layer with a pore size of 100-150 mu m and capable of resisting high-temperature steam of 120-180 DEG C, an upper box body which is vertically slidably installed on the rack and abuts against the filter cloth to form a closed filtration cavity, a liquid inlet pipe which inputs cutting fluid and a cleaning mechanism which cleans impurities. The upper box body is abutted against the filter cloth and then filtered through the filter cloth, so that the impurities on the filter cloth are all stayed in the upper box body, the risk of the impurities moving into the lower box body is reduced, the filter cloth is moved after the upper box body moves upwards, the impurities on the filter cloth can all move to the cleaning mechanism for centralized cleaning, and the filtering efficiency and effect of the cutting fluid are improved.

Description

Technical Field

[0001] This application relates to the technical field of cutting fluid treatment, and in particular to a centralized cutting fluid purification system. Background Technology

[0002] Cutting fluid is an industrial liquid used in metal cutting and grinding processes to cool and lubricate cutting tools and workpieces. The quality of cutting fluid and its treatment has a significant impact on the quality of part machining, tool life, operating costs, and environmental safety.

[0003] The chips, particles, and miscellaneous oils (from hydraulic oil and guide rail oil leaking from the machine tool) generated during cutting mix into the cutting fluid, which reduces its lubrication performance, leading to tool wear and reduced product surface finish. Cutting fluid needs to be replaced periodically, but directly discharging waste cutting fluid will cause serious environmental pollution and waste of cutting fluid.

[0004] Therefore, in the existing technology, the cutting fluid is filtered and regenerated through a cutting fluid purification system. During filtration, the cutting fluid is filtered through a filter cloth. However, because the cutting fluid contains a lot of mixed oil and impurities, these mixed oil and impurities easily clog the pore structure of the filter cloth, greatly slowing down the flow rate of the cutting fluid and damaging the pore structure of the filter cloth, thus reducing the filtration effect of the cutting fluid. Therefore, improving the filtration efficiency and effect of cutting fluid is an urgent technical problem to be solved. Summary of the Invention

[0005] In order to improve the filtration efficiency and effect of cutting fluid, this application provides a centralized cutting fluid purification system.

[0006] This application provides a centralized cutting fluid purification system, which adopts the following technical solution: A centralized cutting fluid purification system includes a frame and a purification device mounted on the frame, the purification device comprising: The lower housing is mounted on the frame; The filter cloth, installed in the lower housing via a driving mechanism, has multiple evenly distributed pore structures for filtration in a ring shape. The filter cloth consists of three layers, arranged from the outside to the inside as follows: The coarse cut-off layer has a pore size of 50-100μm and a thickness of 0.1-0.2mm. The fine filtration layer has a pore size of 10-40 μm and a thickness of 0.2-0.3 mm. The high-temperature resistant support layer has a pore size of 100-150μm and a thickness of 0.3-0.4mm, and can withstand high-temperature steam of 120-180℃. The upper chamber is vertically slidably mounted on the frame and extends through the top of the lower chamber into the lower chamber. The bottom is open and rests against the filter cloth to form a closed filter chamber. The inlet pipe is located at the top of the upper housing and is used to introduce cutting fluid into the filter chamber. The cleaning mechanism first scrapes off the impurities on the filter cloth, and then introduces steam to clean the pore structure that passes through the high-temperature support layer, fine filtration layer and coarse interception layer in sequence. When cleaning is required, the upper housing moves upward and detaches from the filter cloth, and the driving mechanism drives the filter cloth and impurities to the cleaning mechanism for cleaning.

[0007] By adopting the above technical solution, the upper chamber moves down and abuts against the filter cloth for positioning, and forms a filtration chamber with the filter cloth. The cutting fluid is delivered to the temporary storage chamber. The cutting fluid is filtered through the pore structure located on the coarse interception layer, fine filtration layer and high temperature resistant support layer in sequence. The filtered impurities remain on the filter cloth and are located in the filtration chamber. When cleaning is required, the upper chamber moves up to form a certain gap with the filter cloth to allow the impurities on the filter cloth to pass through. The filter cloth moves and drives the impurities to the cleaning mechanism. The clean filter cloth moves to the bottom of the upper chamber.

[0008] As the filter cloth moves, the cleaning mechanism first scrapes off impurities from the filter cloth. Then, as the filter cloth continues to move, the cleaning mechanism outputs steam downwards. The steam passes through the pore structures located on the high-temperature support layer, the fine filtration layer, and the coarse interception layer in sequence, causing the blockage impurities and oil to dissolve and be pushed out by the steam. After the movement is completed, the upper chamber moves down and rests against the clean filter cloth. The cleaning mechanism continues to output steam for cleaning, thereby reducing the risk of filter cloth blockage and improving the filtration efficiency and effect of cutting fluid.

[0009] The upper chamber rests against the filter cloth before filtration, ensuring that all impurities on the filter cloth remain within the upper chamber, reducing the risk of impurities moving to the lower chamber. Furthermore, as the upper chamber moves upwards, the filter cloth moves again, allowing all impurities on the filter cloth to be moved to the cleaning mechanism for centralized cleaning. This timely cleaning of the filter cloth, achieved through the combined use of scrapers and steam, enables faster and better removal of impurities. The simultaneous operation of the cleaning mechanism and filter cloth filtration further reduces the risk of impurities continuously remaining on the filter cloth and damaging it, ensuring effective filtration of the cutting fluid and improving its filtration efficiency and effectiveness.

[0010] Compared to the filter cloth, which needs to be continuously moved for cleaning, a gap is required between the upper chamber and the filter cloth to allow impurities to pass through. This makes it easy for impurities to fall directly into the lower chamber under the impact of cutting fluid. Moreover, a lot of cutting fluid will remain on the filter cloth due to the impurities. Therefore, the cutting fluid will be lost as the impurities are cleaned. This application can greatly improve the filtration efficiency and effect of cutting fluid and reduce the waste of cutting fluid.

[0011] The coarse trapping layer is used to trap large particles of impurities such as metal shavings and grinding wheel abrasives with a diameter greater than 20μm, preventing large particles from directly impacting the fine filter layer and preventing the fine filter layer from being punctured or quickly blocked by sharp particles. The fine filter layer is the core filtration area, used to trap fine particles of grinding debris and suspended impurities with a diameter greater than 5μm. The filtered cutting fluid can meet the requirements of machine tool use. The high-temperature resistant support layer has high strength and high temperature resistance, and can withstand the combined effects of filter cloth tension, scraping force of impurities, and steam impact. In addition, the high-temperature resistant support layer is connected to the drive mechanism for driving, so it can also withstand the force of the drive mechanism, thereby greatly improving the filter cloth life and more stably improving the filtration efficiency and effect of cutting fluid.

[0012] Meanwhile, the pore structure on the high-temperature resistant support layer has the largest pore size, which facilitates the entry of steam into the pore structure to push and dissolve the blockage impurities and oil, thereby further improving the unblocking effect and efficiency of the pore structure, and further improving the filtration efficiency and effect of the cutting fluid.

[0013] The annular filter cloth allows impurities located above the filter cloth to move to one side or even below it. This allows the cleaning mechanism to remove impurities under gravity through scraping, steam pushing, and dissolving, making filter cloth cleaning easier and more thorough, and further improving the filtration efficiency and effectiveness of the cutting fluid.

[0014] Optionally, the coarse interception layer is made of plain weave polyester fiber and has undergone hydrophobic and oleophobic modification treatment, with a surface contact angle ≥110°; the fine filtration layer is made of polypropylene meltblown nonwoven fabric hot-pressed onto the coarse interception layer, with a gradient distribution of pore size and the diameter near the liquid inlet being larger than the diameter near the liquid outlet; the high-temperature resistant support layer is made of glass fiber and polytetrafluoroethylene filament blended twill weave; the steam output temperature of the cleaning mechanism is 100-130℃, and the steam pressure is 0.2-0.4MPa.

[0015] By adopting the above technical solution and after hydrophobic and oleophobic modification treatment, the cutting fluid can quickly spread into a uniform liquid film on the filter cloth surface, reducing the partial overload of the filter cloth caused by the formation of local liquid columns. The plain weave structure has a smooth surface without fiber lint, making it difficult for impurities to embed in the fiber gaps, facilitating the removal of impurities by the scraper in one go. The surface is also relatively smooth, reducing the wear on the cleaning mechanism when removing impurities. The gradient distribution of the pore structure makes it easier for impurities to be blown out by steam after they are trapped. The steam temperature matches the high-temperature resistant support layer, and the steam pressure can better remove impurities and oil, improving the filtration efficiency and effect of the cutting fluid.

[0016] Optionally, the purification device further includes a pre-filtration mechanism, which is installed on the upper housing and has multiple filter holes with a diameter larger than the maximum diameter of the pore structure, and cooperates with the upper housing to form a temporary storage chamber; the inlet pipe inputs cutting fluid into the temporary storage chamber and allows the cutting fluid to be filtered by the pre-filtration mechanism before being transported to the filter cloth for filtration; when the filter cloth needs to be cleaned, the pre-filtration mechanism blocks the filter holes and allows the cutting fluid to be temporarily stored in the temporary storage chamber, the upper housing moves upward and facilitates the filter cloth and impurities on the filter cloth to be moved to the cleaning mechanism for cleaning; after the upper housing moves downward and abuts against the filter cloth, the pre-filtration mechanism opens the filter holes to continue filtering the cutting fluid.

[0017] By adopting the above technical solution, the inlet pipe delivers the cutting fluid to the temporary storage chamber. The cutting fluid first undergoes preliminary filtration through multiple filter holes to remove larger impurities. At the same time, the densely distributed filter holes allow the cutting fluid to be evenly distributed before flowing onto the filter cloth for further filtration. The filtered cutting fluid is then transferred to the lower chamber for storage, which can greatly reduce the filtration pressure on the filter cloth and also reduce the risk of damage to the filter cloth caused by large particles of impurities.

[0018] When the filter cloth needs cleaning, the pre-filtration mechanism seals the filter holes, and the cutting fluid continues to be added to the temporary storage chamber for temporary storage. The upper chamber moves upward, and the filter cloth moves, driving the impurities to the cleaning mechanism, so that the clean filter cloth moves to the bottom of the upper chamber. After the filter cloth has moved, the upper chamber moves downward and rests against the clean filter cloth. The cleaning mechanism cleans the impurities and grease on the filter cloth. The pre-treatment mechanism opens the filter holes, and the cutting fluid in the temporary storage chamber continues to pass through the filter holes and filter cloth for filtration. This process is repeated to achieve the filtration and cleaning of the cutting fluid.

[0019] The pre-filtration mechanism and temporary storage chamber work together to continuously deliver cutting fluid while the filter cloth moves, and can also pre-filter large particulate impurities in the cutting fluid, greatly reducing the filtration pressure on the filter cloth and significantly improving the filtration efficiency and effect of the cutting fluid. At the same time, it allows the cutting fluid to pass through the filter cloth evenly, making full use of the filter cloth and greatly increasing the filter cloth area for filtering the cutting fluid, further improving the filtration efficiency and effect of the cutting fluid.

[0020] Optionally, the pre-filtering mechanism includes: The filter plate is installed inside the upper chamber; The moving filter plate is slidably disposed in the upper box and positioned against the lower surface of the fixed filter plate. The filter holes are evenly opened on the fixed filter plate and the moving filter plate. The temporary storage box is located on the outer wall of the upper box and has a water passage hole that communicates with the upper box located above the fixed filter plate and a water return hole that communicates with the upper box located below the moving filter plate. The filter assembly is installed on the temporary storage tank and located between the water inlet and the water outlet, and has filter holes with the same diameter as the filter holes. A sealing plate is installed on the moving filter plate and is used to block or open the return water hole; When the filter cloth filters the cutting fluid, the filter holes on the fixed filter plate and the moving filter plate are aligned with each other. The cutting fluid and impurities on the moving filter plate can enter the filter assembly through the water passage hole. The impurities remain on the filter assembly, and the water flows back to the upper tank through the return water hole. When the filter cloth needs to be cleaned, the moving filter plate moves, causing the filter holes on the fixed filter plate and the moving filter plate to be misaligned to block them and block the return water hole. At the same time, the cutting fluid and the impurities on the fixed filter plate enter the temporary storage tank through the water passage hole.

[0021] By adopting the above technical solution, when the filter cloth filters the cutting fluid, the filter holes on the fixed filter plate and the moving filter plate are aligned with each other. Water and impurities on the fixed filter plate can enter the filter assembly through the water passage holes. Impurities remain on the filter assembly, and water flows back to the upper tank through the water return holes. When water passes through the water passage holes, it can also push the impurities on the fixed filter plate to move into the filter assembly for cleaning, thus achieving self-cleaning of the fixed filter plate to a certain extent.

[0022] When the filter cloth needs cleaning, the moving filter plate moves relative to the fixed filter plate, causing the filter holes on both plates to misalign, thus blocking multiple holes. Simultaneously, the movement of the moving filter plate drives the sealing plate to block the return water hole, ensuring that all the cutting fluid input from the inlet pipe enters the filter assembly through the water passage. This significantly increases the amount of cutting fluid entering through the water passage, allowing more impurities on the fixed filter plate to be moved to the filter assembly for storage. This greatly improves the cleaning effect on the fixed filter plate. Furthermore, since larger particles of impurities are heavier, even when the cutting fluid fills the storage tank and enters above the fixed filter plate, the amount of impurities moving back to the fixed filter plate with the water flow is relatively small, thus better cleaning the impurities on the moving filter plate.

[0023] After the filter cloth is cleaned, the moving filter plate moves so that the filter holes on the fixed filter plate and the moving filter plate are aligned with each other, and the sealing plate opens the return water hole, thereby continuing to pre-filter the cutting fluid, further improving the filtration efficiency and effect of the cutting fluid.

[0024] Optionally, the temporary storage box is provided with mounting holes, and the filter assembly includes: A filter frame is slidably mounted on a mounting hole and is provided with a mounting plate; the water filter holes are provided on the filter frame. A sealing ring is installed on the mounting plate and presses against the temporary storage box to seal it. The rotating rod is mounted on the mounting plate and snapped onto the temporary storage box for positioning.

[0025] By adopting the above technical solution, the rotating rod rotates away from the temporary storage box, and then the rotating rod can be pulled to remove the filter frame from the mounting hole for cleaning. After cleaning, the filter frame is slid horizontally onto the mounting hole, and the mounting plate is pushed close to the temporary storage box. Then the rotating rod rotates and snaps onto the temporary storage box for positioning. The sealing ring seals the gap between the filter frame and the mounting hole, preventing the cutting fluid from overflowing through the mounting hole, thus achieving the collection and cleaning of impurities.

[0026] Optionally, both the fixed filter plate and the moving filter plate are inclined, with the height of the side closer to the water passage hole being lower than the height of the side farther from the water passage hole, and the liquid inlet pipe is located on the side of the fixed filter plate farther from the water passage hole.

[0027] By adopting the above technical solution, the fixed filter plate and the moving filter plate are tilted at a certain angle, which makes it easier for impurities on the fixed filter plate to be moved into the filter assembly for collection. At the same time, it makes it easier for the cutting fluid to be evenly delivered to the filter cloth, further improving the filtration efficiency and effect of the cutting fluid.

[0028] Optionally, the cleaning mechanism includes: A collection component is provided on the lower housing, allowing the filter cloth to pass through the collection component; Scrapers and steam degreasing components are spaced apart along the direction of filter plate movement and located within the collection component. The scrapers scrape off impurities on the filter cloth and allow the impurities to fall into the collection component for collection under gravity. The steam degreasing component is located inside the filter cloth and is used to output steam downward toward the filter cloth, so that the impurities and oil on the filter cloth can fall into the collection component for collection under the action of heating, melting and pushing force.

[0029] By adopting the above technical solution, the movement of the filter plate causes the scraper to remove impurities. The impurities fall into the collection component under the action of gravity. At the same time, the steam degreasing component outputs steam downwards. The steam passes through the porous structure, causing the blockage impurities and oil to dissolve and fall into the housing under the action of the pushing force. After passing through the porous structure, the steam can continue to push the impurities toward the collection component until the impurities are moved into the collection component for collection. Meanwhile, the steam degreasing component is located inside the collection component and is in a relatively closed state, thereby reducing the risk of impurities and steam moving into the external environment and improving the filtration efficiency and effect of the cutting fluid.

[0030] Optionally, the steam degreasing assembly covers a larger area of ​​the filter cloth than the upper housing covers the filter cloth, and continues to output steam for cleaning after the filter cloth stops moving. The steam degreasing assembly includes: The steam plate has multiple steam holes on the side near the filter cloth to be cleaned and is located inside the filter cloth. A conveying pipe, connected to a steam orifice, is used to output steam downwards through multiple steam orifices.

[0031] By adopting the above technical solution, steam is introduced into the delivery pipe, allowing the steam to move towards the filter cloth through multiple steam holes. The steam then passes downward through the pore structure, causing impurities blocked in the pore structure to fall off. At the same time, the steam degreasing component covers a larger area than the upper chamber covers the filter cloth, and steam continues to be introduced after the filter cloth stops cleaning, thereby better ensuring the cleaning effect on the filter cloth and improving the filtration efficiency and effect of the cutting fluid.

[0032] Optionally, the collection component includes: The casing is located at the bottom of the lower housing and tapers inward. The collection box is detachably mounted on the lower housing and rests against the bottom of the housing. The impurities scraped off by the scraper fall directly downward into the collection box. The steam degreasing component pushes the blocked impurities downward into the housing and causes the impurities to move towards the collection box under the action of steam until the impurities fall into the collection box for collection.

[0033] By adopting the above technical solution, the housing allows both impurity fall and steam transport to occur within it. Impurities fall into the collection box under gravity for collection, and the collection box is located directly below the scraper. The scraper removes a large number of impurities, allowing them to fall directly into the collection box for collection. Meanwhile, impurities removed by the steam degreasing component remain inside the housing, with some falling downwards under gravity until they reach the collection box. Simultaneously, the downward movement of steam also pushes the impurities towards the collection box, thus better removing impurities from the filter cloth and improving the filtration efficiency and effect of the cutting fluid.

[0034] Optionally, a flow-guiding assembly is provided inside the lower housing and located on the inner side of the filter cloth, the flow-guiding assembly comprising: The flow guide rod is installed on the lower housing and extends to the inside of the filter cloth; The diversion plate, mounted on the diversion rod and extending downwards at an angle to both sides of the filter cloth, is used to guide the cutting fluid passing through the filter cloth into the lower chamber.

[0035] By adopting the above technical solution, the annular filter cloth makes it easy for the cleaning mechanism to overlap with the downward flow path of the cutting fluid, which would cause the cutting fluid to enter the impurities and be wasted, and also make the impurities inconvenient to transport. Therefore, by using a guide plate to guide the fallen cutting fluid to the outside of the filter cloth, the cleaning mechanism and the downward flow path of the cutting fluid do not overlap, and the two do not interfere with each other, thereby improving the filtration efficiency and effect of the cutting fluid.

[0036] In summary, this application includes at least one of the following beneficial technical effects: 1. The upper chamber rests against the filter cloth before filtration, ensuring that all impurities on the filter cloth remain within the upper chamber. This reduces the risk of impurities migrating to the lower chamber. Furthermore, as the upper chamber moves upwards, the filter cloth moves again, allowing impurities to be moved to the cleaning mechanism for centralized cleaning. This timely cleaning of the filter cloth, achieved through the combined use of a scraper and steam, enables faster and more effective cleaning. The simultaneous operation of the cleaning mechanism and filter cloth filtration further reduces the risk of impurities damaging the filter cloth, ensuring effective filtration of the cutting fluid and improving its filtration efficiency and effectiveness.

[0037] 2. The pore structure located on the high-temperature resistant support layer has the largest pore size, which facilitates the entry of steam into the pore structure to push and dissolve the blockage impurities and oil, thereby further improving the unblocking effect and efficiency of the pore structure, and thus further improving the filtration efficiency and effect of the cutting fluid.

[0038] 3. The pre-filtration mechanism and temporary storage chamber work together to continuously deliver cutting fluid while the filter cloth moves, and can also pre-filter large particulate impurities in the cutting fluid, greatly reducing the filtration pressure on the filter cloth and significantly improving the filtration efficiency and effect of the cutting fluid. At the same time, it allows the cutting fluid to pass through the filter cloth evenly, making full use of the filter cloth and greatly increasing the filter cloth area for filtering the cutting fluid, further improving the filtration efficiency and effect of the cutting fluid. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of the purification system; Figure 2 yes Figure 1 A cross-sectional schematic diagram of AA in the middle; Figure 3 yes Figure 2 Enlarged diagram of section B; Figure 4 yes Figure 2 Enlarged diagram of section C; Figure 5 This is a partial structural diagram of the temporary storage box and filter components in the purification system; Figure 6 This is a structural schematic diagram of the cleaning mechanism in the purification system, which shows a cross-section of the side wall of the housing.

[0040] Reference numerals: 1. Frame; 11. Filter chamber; 12. Temporary storage chamber; 2. Purification device; 21. Lower housing; 22. Upper housing; 23. Inlet pipe; 24. Fixing hole; 25. Drive source one; 3. Filter cloth; 31. Coarse filtration layer; 32. Fine filtration layer; 33. High-temperature resistant support layer; 34. Upper part; 35. Lower part; 4. Pre-filtration mechanism; 41. Fixed filter plate; 42. Moving filter plate; 421. Drive source two; 43. Temporary storage box; 431. Water passage hole; 432. Return water 44. Hole; 45. Sealing plate; 46. Filter assembly; 47. Filter frame; 48. Mounting plate; 49. Sealing ring; 50. Rotating rod; 61. Fixing block; 72. Drive mechanism; 53. Rotating roller; 64. Cleaning mechanism; 75. Scraper; 76. Collection assembly; 77. Housing; 78. Receiving section; 79. Cleaning section; 70. Collection box; 71. Collection plate; 80. Steam degreasing assembly; 81. Steam plate; 82. Conveying pipe; 91. Drainage assembly; 92. Drainage rod; 93. Drainage plate. Detailed Implementation

[0041] The following provides a further detailed description of this application.

[0042] This application discloses a centralized cutting fluid purification system.

[0043] Reference Figure 1 The cutting fluid centralized purification system includes a frame 1 and a purification device 2 installed on the frame 1 for purifying the cutting fluid.

[0044] Reference Figures 1-3 The purification device 2 includes a lower housing 21, a filter cloth 3, an upper housing 22, an inlet pipe 23, a pre-filtration mechanism 4, and a cleaning mechanism 6. The lower housing 21 is fixedly installed on the frame 1, and a fixing hole 24 is provided on the top. The filter cloth 3 is set in the lower housing 21 through the driving mechanism 5, and has multiple pore structures for filtration evenly provided, forming a ring shape.

[0045] The frame 1 extends above the lower housing 21. The upper housing 22 is vertically slidably mounted on the frame 1. The upper housing 22 is rectangular, and its four side walls abut against the four side walls of the fixing hole 24. The bottom of the upper housing 22 extends below the fixing hole 24, i.e., inside the lower housing 21. The top of the upper housing 22 is located above the lower housing 21. The upper housing 22 and the lower housing 21 are parallel in length. A drive source 25 for driving the upper housing 22 to move vertically is fixedly mounted on the top of the frame 1. The drive source 25 can be an electric actuator or a hydraulic cylinder. The fluid inlet pipe 23 is fixedly mounted on the upper surface of the upper housing 22 and communicates with the inside of the upper housing 22. It is used to input cutting fluid, and the fluid inlet pipe 23 is a flexible hose to accommodate the movement of the upper housing 22.

[0046] The pre-filtration mechanism 4 is installed on the upper housing 22 and has multiple filter holes with a diameter larger than the maximum diameter of the pore structure. It cooperates with the upper housing 22 to form a temporary storage cavity 12. The cleaning mechanism 6 first scrapes off the impurities on the filter cloth 3, and then introduces steam to clean the multiple pore structures on the filter cloth 3.

[0047] The upper chamber 22 moves down and abuts against the filter cloth 3 to form a filter chamber 11. The inlet pipe 23 inputs cutting fluid into the temporary storage chamber 12. The cutting fluid first passes through the pre-filtration mechanism 4 for the first filtration, filtering out larger impurities. At the same time, the cutting fluid is more evenly distributed on the pre-filtration mechanism 4. The evenly distributed cutting fluid is then transported downward to the filter cloth 3 for filtration.

[0048] When the filter cloth 3 needs to be cleaned, the pre-filtration mechanism 4 blocks the filter holes and allows the cutting fluid to be temporarily stored in the temporary storage chamber 12. The upper box 22 moves upward to form a gap between itself and the filter cloth 3 for impurities to pass through. The drive mechanism 5 starts to drive the filter cloth 3 and impurities to the cleaning mechanism 6 for cleaning. The clean filter cloth 3 is moved to the lower part of the upper box 22. The filter cloth 3 stops moving, and the upper box 22 moves downward to abut against the filter cloth 3 for positioning. The pre-filtration mechanism 4 opens the filter holes to continue filtering the cutting fluid, so that the cutting fluid is continuously input while the filter cloth 3 is being cleaned, and the two do not interfere with each other.

[0049] The drive mechanism 5 includes multiple rotating rollers 51 and a drive component. The multiple rotating rollers 51 are rotatably mounted on the inner side wall of the lower housing 21 and are horizontally arranged and spaced apart along the length of the lower housing 21. At the same time, the multiple rotating rollers 51 are arranged in two vertically spaced rows. The drive component is a servo motor, which is fixedly mounted on the outer side wall of the lower housing 21 and connected to a certain rotating roller 51. The filter cloth 3 is sleeved on the multiple rotating rollers 51, and the drive component is activated to drive the multiple rotating rollers 51 to rotate, thereby driving the filter cloth 3 to move.

[0050] The filter cloth 3 has a three-layer structure, consisting of a coarse retention layer 31, a fine filtration layer 32, and a high-temperature resistant support layer 33 from the outside to the inside. The coarse retention layer 31 is made of plain weave polyester fiber and has undergone hydrophobic and oleophobic modification treatment, resulting in a surface contact angle ≥110°. The coarse retention layer 31 is the first to come into contact with the cutting fluid, thereby enabling the cutting fluid to quickly spread into a uniform liquid film on the surface of the filter cloth 3, reducing the risk of local overload of the filter cloth 3 caused by the formation of local liquid columns. The polyester fiber has excellent wear resistance and tear resistance, and can withstand the contact pressure when the cleaning mechanism 6 scrapes away impurities, reducing the risk of fiber shedding. At the same time, the high surface smoothness results in low resistance when scraping away impurities, which also reduces wear on the cleaning mechanism 6.

[0051] The fine filter layer 32 is the core filtration area, formed by hot-pressing polypropylene meltblown nonwoven fabric onto the coarse retention layer 31. The high-temperature resistant support layer 33 is made of glass fiber and polytetrafluoroethylene filament blended twill weave and is laminated onto the fine filter layer 32. The high-temperature resistant support layer 33 can withstand high-temperature steam of 120-180℃, preferably 160-180℃. The thickness of the coarse retention layer 31 is 0.1-0.2mm, which can be 0.1mm or 0.2mm; the thickness of the fine filter layer 32 is 0.2-0.3mm, which can be 0.2mm or 0.3mm; and the thickness of the high-temperature resistant support layer 33 is 0.3-0.4mm, which can be 0.3mm or 0.4mm.

[0052] The pore size of the pore structure on the coarse retention layer 31 is 50-100μm, which can be 50μm, 70μm, or 100μm; the pore size of the pore structure on the fine filtration layer 32 is 10-40μm, which can be 10μm, 30μm, or 40μm; the pore size of the pore structure on the high-temperature resistant support layer 33 is 100-150μm, which can be 100μm, 120μm, or 150μm; the pore size of the filter pores is greater than 150μm, and the diameter of the pore structure on the fine filtration layer 32 changes in a gradient, with the diameter near the liquid inlet being larger than the diameter near the liquid outlet. The liquid inlet is the cutting fluid input end, and the liquid outlet is the cutting fluid output end.

[0053] The cutting fluid undergoes initial filtration through multiple filter holes. The coarse retention layer 31 is used to retain large particles of impurities such as metal chips and grinding wheel abrasive grains that are not filtered out, preventing large particles from directly impacting the fine filtration layer 32 and preventing the fine filtration layer 32 from being punctured or quickly blocked by sharp particles. The fine filtration layer 32 is the core filtration area, used to retain fine particles of grinding debris and suspended impurities with a particle size greater than 10μm. The filtered cutting fluid can meet the requirements of machine tool use. The high-temperature resistant support layer 33 has high strength and high temperature resistance, and can withstand the combined effects of the force of the rotating roller 51, the tension of the filter cloth 3, the scraping force of scraping impurities, and the steam impact force. The high-temperature resistant support layer 33 is in contact with the drive mechanism 5 for driving.

[0054] Steam flows downwards through the pore structures located on the high-temperature resistant support layer 33, the fine filter layer 32, and the coarse interception layer 31 for cleaning. The hot air first contacts the high-temperature resistant support layer 33, which can withstand the high temperature of the steam. The pore structure on the high-temperature resistant support layer 33 has the largest pore size, which facilitates the steam to enter the pore structure and push and dissolve the blockage impurities and oil, thereby further improving the unblocking effect and efficiency of the pore structure, and thus further improving the filtration efficiency and effect of the cutting fluid.

[0055] Reference Figure 1 , Figure 2 , Figures 4-6The pre-filtration mechanism 4 includes a fixed filter plate 41, a moving filter plate 42, a temporary storage box 43, a filter assembly 45, and a sealing plate 44. The fixed filter plate 41 and the moving filter plate 42 are parallel to each other and are both inclined, and they abut against each other. At the same time, multiple filter holes are evenly opened and located on the fixed filter plate 41 and the moving filter plate 42. The fixed filter plate 41 is located above the moving filter plate 42 and is fixedly installed on the inner side wall of the upper housing 22. The moving filter plate 42 slides along its own inclined direction. Installed on the inner wall of the upper housing 22, the filter holes on the fixed filter plate 41 and the moving filter plate 42 are aligned with each other for filtering the cutting fluid; or, the filter holes on the fixed filter plate 41 and the moving filter plate 42 are misaligned for blocking the filter holes, so that the cutting fluid is temporarily stored in the storage chamber 12; a second drive source 421 for driving the moving filter plate 42 is fixedly installed on the outer wall of the upper housing 22, and the second drive source 421 is an electric actuator.

[0056] The temporary storage box 43 is fixedly installed on the side wall of the upper box 22 away from the drive source 421. The top of the temporary storage box 43 extends above the fixed filter plate 41 and the bottom extends below the moving filter plate 42. The height of the fixed filter plate 41 near the temporary storage box 43 is lower than that of the other end. Water passage holes 431 and water return holes 432 are provided at intervals on the side wall of the upper box 22 near the temporary storage box 43. The bottom of the water passage hole 431 is flush with the upper surface of the fixed filter plate 41, and the water return hole 432 is located below the moving filter plate 42. Both the water passage hole 431 and the water return hole 432 are connected to the inside of the temporary storage box 43, so that the temporary storage cavity 12 is formed by the cooperation between the upper box 22 located above the fixed filter plate 41 and the inside of the temporary storage box 43.

[0057] The inlet pipe 23 is located on the side of the fixed filter plate 41 away from the water passage hole 431, so that the cutting fluid input by the inlet pipe 23 moves downward to the highest point of the fixed filter plate 41; the filter assembly 45 is installed on the temporary storage tank 43 and is located between the water passage hole 431 and the return water hole 432, and is used to filter the cutting fluid. The filter assembly 45 has filter holes with the same diameter as the filter holes; the sealing plate 44 is fixedly installed on the lower surface of the moving filter plate 42 and is set corresponding to the return water hole 432.

[0058] When the filter cloth 3 filters the cutting fluid, the moving filter plate 42 moves so that the filter holes on the fixed filter plate 41 and the moving filter plate 42 are aligned with each other. The sealing plate 44 is located on one side of the return water hole 432, so that the cutting fluid is evenly distributed and filtered through multiple filter holes. A portion of the cutting fluid enters the filter assembly 45 through the water passage hole 431 and is then filtered through multiple water passage holes. After filtration, the cutting fluid flows back into the upper box 22 through the return water hole 432. The cutting fluid then moves to the filter cloth 3 for filtration. At the same time, as the cutting fluid passes through the filter assembly 45, it also moves the impurities on the fixed filter plate 41 into the filter assembly 45, thereby cleaning the impurities on the fixed filter plate 41 to a certain extent.

[0059] When the filter cloth 3 needs to be cleaned, the drive source 421 drives the fixed filter plate 41 to move, causing the filter holes on the fixed filter plate 41 and the moving filter plate 42 to be misaligned. The sealing plate 44 presses against the inner wall of the upper housing 22 to block the return water hole 432, allowing the cutting fluid input from the inlet pipe 23 to flow onto the fixed filter plate 41. The cutting fluid is filtered through the water hole 431 and the filter assembly 45. The cutting fluid is stored at the bottom of the temporary storage tank 43. During the flow, impurities on the fixed filter plate 41 can be moved to the filter assembly 45 for filtration, which can better clean the impurities on the fixed filter plate 41, thus facilitating the subsequent filtration of the cutting fluid. When the filter cloth 3 needs to filter the cutting fluid, the moving filter plate 42 moves, aligning the filter holes on the fixed filter plate 41 and the moving filter plate 42. The sealing plate 44 is located on one side of the return water hole 432 and opens the return water hole 432 to continue filtering the cutting fluid.

[0060] The filter assembly 45 includes a filter frame 46, a sealing ring 47, and a rotating rod 48. The temporary storage box 43 has a mounting hole on its side wall, which is located between the water inlet hole 431 and the water outlet hole 432. The filter frame 46 is horizontally slidably mounted on the mounting hole, and multiple water filter holes are provided on the filter frame 46. A mounting plate 461 is fixedly mounted on the side wall of the filter frame 46, which abuts against the outer side wall of the temporary storage box 43. The mounting plate 461 has an annular mounting groove on the side wall of the temporary storage box 43, and the filter frame 46 is located inside the mounting groove.

[0061] The sealing ring 47 is snapped onto the mounting groove and is made of rubber. The mounting plate 461 pushes the sealing ring 47 against the temporary storage box 43 for positioning. A fixing block 49 is fixedly installed on the side wall of the temporary storage box 43 along the moving direction of the filter frame 46. The rotating rod 48 is rotatably installed on the side wall of the mounting plate 461 away from the temporary storage box 43. After the rotating rod 48 rotates to the outside of the mounting plate 461, it is snapped onto the fixing block 49 to position the mounting plate 461, so that the sealing ring 47 is used to prevent water in the temporary storage box 43 from overflowing through the mounting hole.

[0062] The cleaning mechanism 6 includes a collection component 7, a scraper 61, and a steam degreasing component 8. The collection component 7 is disposed on the lower housing 21, and the filter cloth 3 passes through the collection component 7. The collection component 7 includes a housing 71 and a collection box 72. The housing 71 includes a receiving section 711 and a cleaning section 712. The annular filter cloth 3 forms an interconnected upper part 34 and a lower part 35, with the upper part 34 located above the lower part 35. Part of the rotating roller 51 is located inside the housing 71. The receiving section 711 is fixedly installed on the inner top wall of the lower housing 21 and is located on one side of the fixing hole 24, and has a through hole for the upper part 34 to pass through.

[0063] The cleaning section 712 is integrally set at the bottom of the receiving section 711 and extends to the horizontal fixing hole 24 and below the upper box 22, and extends vertically downward to the lower part 35. At the same time, the cleaning section 712 has a through hole 2 for the lower part 35 to pass through. The bottom of the cleaning section 712 is inclined downward toward the receiving section 711, so that the bottom of the cleaning section 712 is inwardly contracted. The side wall of the lower box 21 has a cleaning hole. The collection box 72 is horizontally slidably installed on the cleaning hole, and the upper surface of the collection box 72 is positioned against the bottom of the cleaning section 712, so that the impurities in the shell 71 are moved to the collection box 72 for collection. The side wall of the collection box 72 is fixedly installed with a collection plate 73 that is positioned against the outer side wall of the lower box 21.

[0064] Reference Figures 1-6 The scraper 61 and the steam degreasing assembly 8 are spaced apart along the moving direction of the filter cloth 3. The scraper 61 is fixedly installed on the inner side wall of the housing 71 and is positioned by tilting upward against the coarse retention layer 31 and located directly above the collection box 72. When the filter cloth 3 moves, the scraper 61 is used to scrape off the impurities located on the coarse retention layer 31. The scraped impurities fall directly downward into the collection box 72 for collection.

[0065] The steam degreasing component 8 is located inside the filter cloth 3 and within the cleaning section 712. It outputs steam downwards toward the filter cloth 3, allowing the steam to pass through the pore structures on the high-temperature support layer 33, the fine filtration layer 32, and the coarse interception layer 31 in sequence. This causes the blockage impurities and oil to dissolve and fall onto the inner wall of the cleaning section 712 under the action of thrust and heating. At the same time, the steam also pushes the impurities in the cleaning section 712 downwards, i.e., towards the collection box 72, until the impurities are collected in the collection box 72. The output steam temperature is 100-130℃ and the steam pressure is 0.2-0.4MPa.

[0066] The steam degreasing component 8 is located in a closed space, which reduces the risk of steam overflow and waste and environmental pollution. The coverage area of ​​the steam degreasing component 8 on the filter cloth 3 is greater than or equal to the coverage area of ​​the filter cloth on the upper box 22. After the filter cloth 3 is moved, the steam degreasing component 8 can continue to clean the output steam, thereby further ensuring the cleaning effect on the filter cloth 3.

[0067] The steam degreasing assembly 8 includes a steam plate 81 and a conveying pipe 82. The steam plate 81 is fixedly installed inside the cleaning section 712 and is parallel to the corresponding lower part 35. Multiple steam holes are fixedly installed on the side wall of the steam plate 81 near the lower part 35. The conveying pipe 82 is fixedly installed on the side wall of the steam plate 81 and communicates with the multiple steam holes. The conveying pipe 82 is a flexible hose and passes through the housing 71 and the lower box 21. The conveying pipe 82 is used to convey steam to the steam holes. The steam passes downward through the filter cloth 3 and is used to clean the impurities and oil clogging the filter cloth 3.

[0068] A flow guiding assembly 9 is provided inside the lower housing 21 and on the inner side of the filter cloth 3. The flow guiding assembly 9 includes a flow guiding rod 91 and a flow guiding plate 92. The flow guiding rod 91 is fixedly installed on the inner side wall of the lower housing 21 and multiple rods are arranged horizontally at intervals. The flow guiding rod 91 extends horizontally to the inner side of the filter cloth 3. The flow guiding plate 92 is fixedly installed on the end of the flow guiding rod 91 located inside the filter cloth 3. The flow guiding plate 92 extends downward at an angle to the outer side of the filter cloth 3 and extends to both sides of the filter cloth 3. This allows the cutting fluid filtered through the filter cloth 3 to be transferred to the flow guiding plate 92. The cutting fluid is guided by the flow guiding plate 92 to the outer side of the filter cloth 3 and then transferred to the lower housing 21 for storage.

[0069] The working principle of this application embodiment is as follows: The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cutting fluid centralized purification system, characterized by: Includes a frame (1) and a purification device (2) mounted on the frame (1), wherein the purification device (2) includes: The lower housing (21) is mounted on the frame (1); The filter cloth (3) is installed in the lower housing (21) by a driving mechanism (5) and has multiple evenly distributed pore structures for filtration in a ring shape. The filter cloth (3) has three layers, which are arranged from the outside to the inside as follows: The coarse cut-off layer (31) has a pore size of 50-100 μm and a thickness of 0.1-0.2 mm. The fine filter layer (32) has a pore size of 10-40 μm and a thickness of 0.2-0.3 mm. The high-temperature resistant support layer (33) has a pore size of 100-150μm and a thickness of 0.3-0.4mm, and can withstand high-temperature steam at 120-180℃. The upper box (22) is vertically slidably mounted on the frame (1) and its bottom extends through the top of the lower box (21) into the lower box (21). The bottom is open and abuts against the filter cloth (3) to form a closed filter chamber (11). The inlet pipe (23) is located at the top of the upper housing (22) and is used to input cutting fluid into the filter chamber (11); The cleaning mechanism (6) first scrapes off the impurities on the filter cloth (3) and then introduces steam downwards through the pore structure on the high-temperature support layer (33), fine filter layer (32) and coarse interception layer (31) for cleaning. When cleaning is required, the upper housing (22) moves upward and separates from the filter cloth (3), and the driving mechanism (5) drives the filter cloth (3) and impurities to the cleaning mechanism (6) for cleaning.

2. The cutting fluid centralized purification system of claim 1, wherein: The coarse interception layer (31) is made of plain weave polyester fiber and has been modified with hydrophobic and oleophobic properties, and has a surface contact angle ≥110°. The fine filtration layer (32) is made of polypropylene meltblown nonwoven fabric hot-pressed onto the coarse interception layer (31) and has a gradient distribution of pore size, making the diameter near the liquid inlet larger than the diameter near the liquid outlet. The high-temperature resistant support layer (33) is made of glass fiber and polytetrafluoroethylene filament blended twill weave. The cleaning mechanism (6) outputs steam at a temperature of 100-130℃ and a steam pressure of 0.2-0.4MPa.

3. The cutting fluid centralized purification system according to claim 1, characterized in that: The purification device (2) also includes a pre-filtration mechanism (4), which is set on the upper box (22) and has multiple filter holes with a diameter larger than the maximum diameter of the pore structure. It cooperates with the upper box (22) to form a temporary storage chamber (12). The liquid inlet pipe (23) inputs cutting fluid into the temporary storage chamber (12) and allows the cutting fluid to be filtered by the pre-filtration mechanism (4) before being transported to the filter cloth (3) for filtration. When the filter cloth (3) needs to be cleaned, the pre-filtration mechanism (4) blocks the filter holes and allows the cutting fluid to be temporarily stored in the temporary storage chamber (12). The upper box (22) moves upward and facilitates the filter cloth (3) and the impurities on the filter cloth (3) to be moved to the cleaning mechanism (6) for cleaning. After the upper box (22) moves downward and abuts against the filter cloth (3), the pre-filtration mechanism (4) opens the filter holes to continue filtering the cutting fluid.

4. The cutting fluid centralized purification system according to claim 3, characterized in that: The pre-filtration mechanism (4) includes: A fixed filter plate (41) is installed inside the upper housing (22); The moving filter plate (42) is slidably disposed in the upper housing (22) and positioned against the lower surface of the fixed filter plate (41). The filter holes are evenly distributed on the fixed filter plate (41) and the moving filter plate (42). The temporary storage box (43) is set on the outer wall of the upper box (22) and has a water passage hole (431) communicating with the upper box (22) above the fixed filter plate (41) and a return water hole (432) communicating with the upper box (22) below the moving filter plate (42). The filter assembly (45) is installed on the temporary storage box (43) and located between the water passage hole (431) and the return water hole (432), and has filter holes with the same diameter as the filter holes. A sealing plate (44) is installed on the moving filter plate (42) and is used to block or open the return water hole (432). When the filter cloth (3) filters the cutting fluid, the filter holes on the fixed filter plate (41) and the moving filter plate (42) are aligned with each other. The cutting fluid and impurities on the moving filter plate (42) can enter the filter assembly (45) through the water passage hole (431). The impurities remain on the filter assembly (45) and the water flows back to the upper box (22) through the return water hole (432). When the filter cloth (3) needs to be cleaned, the moving filter plate (42) moves and the filter holes on the fixed filter plate (41) and the moving filter plate (42) are misaligned to achieve blockage and the sealing plate (44) blocks the return water hole (432). At the same time, the cutting fluid and the impurities on the fixed filter plate (41) enter the temporary storage box (43) through the water passage hole (431).

5. A centralized cutting fluid purification system according to claim 4, characterized in that: The temporary storage box (43) has mounting holes, and the filter assembly (45) includes: A filter frame (46) is slidably mounted on a mounting hole and is provided with a mounting plate (461), wherein the water filter hole is provided on the filter frame (46); A sealing ring (47) is provided on the mounting plate (461) and presses against the temporary storage box (43) to seal; The rotating rod (48) is rotatably mounted on the mounting plate (461) and snapped onto the temporary storage box (43) for positioning.

6. A centralized cutting fluid purification system according to claim 5, characterized in that: The fixed filter plate (41) and the moving filter plate (42) are both inclined and the height of the side near the water passage hole (431) is lower than the height of the side away from the water passage hole (431). The liquid inlet pipe (23) is located on the side of the fixed filter plate (41) away from the water passage hole (431).

7. A centralized cutting fluid purification system according to claim 1, characterized in that: The cleaning mechanism (6) includes: The collection component (7) is disposed on the lower housing (21) such that the filter cloth (3) passes through the collection component (7); The scraper (61) and the steam degreasing assembly (8) are spaced apart along the moving direction of the filter plate and located inside the collection assembly (7). The scraper (61) scrapes off impurities on the filter cloth (3) and causes the impurities to fall into the collection assembly (7) for collection under the action of gravity. The steam degreasing assembly (8) is located inside the filter cloth (3) and is used to output steam downward toward the filter cloth (3), so that the impurities and oil on the filter cloth (3) can fall into the collection assembly (7) for collection under the action of heating and melting and pushing force.

8. A centralized cutting fluid purification system according to claim 7, characterized in that: The steam degreasing assembly (8) covers a larger area of ​​the filter cloth (3) than the upper housing (22) covers the filter cloth (3), and continues to output steam for cleaning after the filter cloth (3) stops moving. The steam degreasing assembly (8) includes: The steam plate (81) has multiple steam holes on the side near the filter cloth (3) to be cleaned and is located inside the filter cloth (3); The conveying pipe (82) is connected to the steam holes and is used to output steam downward through multiple steam holes.

9. A centralized cutting fluid purification system according to claim 7, characterized in that: The collection component (7) includes: The housing (71) is located inside the bottom of the lower box (21) and is tapered inward; The collection box (72) is detachably mounted on the lower housing (21) and rests against the bottom of the housing (71). The impurities scraped off by the scraper (61) fall directly downwards into the collection box (72). The steam degreasing assembly (8) pushes the clogged impurities downwards into the housing (71) and causes the impurities to move towards the collection box (72) under the action of steam until the impurities are removed. It falls into the collection box (72) for collection.

10. A centralized cutting fluid purification system according to claim 7, characterized in that: A flow-guiding assembly (9) is provided inside the lower housing (21) and on the inner side of the filter cloth (3). The flow-guiding assembly (9) includes: The flow guide rod (91) is set on the lower box (21) and extends to the inside of the filter cloth (3); A diversion plate (92) is set on the diversion rod (91) and extends downward at an angle to both sides of the filter cloth (3) to guide the cutting fluid passing through the filter cloth (3) into the lower box (21).

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