A recirculating filtration system for heat treating a coolant

Abstract

This invention relates to the field of heat treatment technology and discloses a circulating filtration system for heat treatment coolant, including a base, a first filter tank fixedly mounted on the base, a second filter tank fixedly mounted on one side of the first filter tank, and an impurity filtration assembly disposed inside the first filter tank. A discharge channel is connected to the top of one side wall of the first filter tank, and a cleaning assembly is disposed inside the first filter tank. This invention solves the technical problems of coolant resource waste, insufficient filtration cleanliness, and inability to achieve efficient resource recycling in the prior art through the coordinated arrangement of the second filter tank, water pump, circulating pipeline, filter element, and multi-stage filtration mechanism. By using a cleaning fluid miscible with oil-based coolant to circulate and flush away impurities, the coolant adsorbed and coated on the surface of the impurities can be peeled off and recovered. After filtration by the filter element and subsequent separation treatment, the coolant can be reused, reducing resource consumption and production costs.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, specifically a circulating filtration system for heat treatment coolant. Background Technology

[0002] In the field of metal heat treatment, coolant is a key consumable for ensuring the smooth operation of heat treatment processes and improving workpiece processing quality. Among them, oil-based coolants, with their excellent cooling performance and oxidation resistance, are widely used in heat treatment processes such as quenching and tempering of various metal workpieces. During long-term circulation, oil-based coolants will carry a large amount of solid impurities such as oxide scale, carbon slag, and iron powder. If these impurities are not filtered and removed in time, they will not only affect the cooling effect of the coolant but also accelerate the wear of heat treatment equipment and reduce the surface finish of the workpiece. Therefore, a high-efficiency circulating filtration system is the core element to ensure the stable use of oil-based coolants and extend their service life.

[0003] The filtration of existing heat treatment oil-based coolants mostly adopts conventional methods such as single-screen filtration, static sedimentation, or simple filter element filtration. During operation, the coolant to be filtered is usually directly passed into the filtration equipment, and solid impurities in the coolant are intercepted by the filter screen or filter element. The filtered clean coolant is directly returned to the heat treatment process for recycling, while the impurities accumulate on the surface of the filter screen or filter element.

[0004] Existing heat treatment coolant filtration technology has many technical defects and is difficult to meet actual production needs: First, solid impurities will adsorb and coat a large amount of oil-based coolant on their surface. Directly discarding impurities will result in a large waste of coolant resources and increase production costs. Second, it is difficult to clean the impurities accumulated on the filter screen surface. It is easy to cause problems such as filter pore blockage and impurity stagnation. Manual cleaning is inefficient and can easily damage filter components, affecting filtration efficiency and equipment lifespan.

[0005] Therefore, it is necessary to provide a circulating filtration system for heat treatment coolant to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a circulating filtration system for heat treatment coolant. By using a combination of a filter tank, a water pump, a circulating pipeline, a filter element, and a multi-stage filtration mechanism, the invention solves the technical problems of coolant waste, insufficient filtration cleanliness, and inability to achieve efficient resource recycling in the prior art.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a circulating filtration system for heat treatment coolant, comprising a base, a filter tank one fixedly mounted on the base, a filter tank two fixedly mounted on one side of the filter tank one, and an impurity filtration assembly disposed inside the filter tank one. A discharge channel is connected to the top of one side wall of the filter tank. A cleaning assembly is disposed inside the filter tank one, which is used to input impurities filtered by the impurity filtration assembly into the filter tank two through the discharge channel. A water pump is fixedly mounted at the bottom of the filter tank two, with the inlet end of the water pump connected to the filter tank two and the outlet end of the water pump connected to a drain port two. A valve is disposed on the drain port two. A circulation pipe is fixedly mounted on the filter tank two, with the top end of the circulation pipe connected to the top of the inner cavity of the filter tank two and the bottom end of the circulation pipe connected to the drain port two. The end of the discharge channel away from the filter tank one is connected to the top of the circulation pipe. A filter element is fixedly disposed inside the filter tank two.

[0008] A further configuration of the present invention is as follows: the impurity filtration assembly includes a support ring and a filter screen, the support ring is fixedly installed inside the filter tank, the filter screen is fixedly installed inside the support ring, and the filter screen and the top wall of the support ring are located in the same horizontal plane.

[0009] A further provision of the present invention is that: a lifting plate is provided below the support ring, a sealing plate is fixedly installed on the upper surface of the lifting plate, the outer diameter of the sealing plate is the same as the inner diameter of the support ring, and a transmission component for driving the lifting plate to rise and fall is provided inside the filter tank.

[0010] A further configuration of the present invention is as follows: a spring is fixedly connected to the upper surface of the lifting plate, the top end of the spring is fixedly connected to the lower surface of the support ring, and a plurality of guide posts are fixedly installed on the lower surface of the support ring, the guide posts penetrate the lifting plate, and the lifting plate slides in cooperation with the guide posts.

[0011] A further provision of the present invention is that: a liquid inlet is connected to the top of one side wall of the filter tank, and a liquid outlet is connected to the bottom of the filter tank; an air pump is fixedly installed on the base, and an air supply pipe is connected to the air outlet of the air pump, and the air outlet of the air supply pipe is connected to the liquid inlet.

[0012] A further configuration of the present invention is as follows: the cleaning assembly includes a motor, a rotating shaft, a telescopic component, and a scraper; a tank cover is fixedly installed on the top of the filter tank; the motor is fixedly installed on the tank cover; the output end of the motor is connected to the rotating shaft for transmission; the bottom end of the rotating shaft is connected to the scraper through the telescopic component; when the rotating shaft is stationary, a gap is provided between the scraper and the filter screen.

[0013] A further configuration of the present invention is as follows: the telescopic component includes a sliding sleeve, a first connecting seat, a second connecting seat, a first connecting rod, a second connecting rod, a connecting frame, and a counterweight. The scraper is fixedly connected to the bottom end of the sliding sleeve, and the bottom end of the rotating shaft extends into the sliding sleeve, with the sliding sleeve and the rotating shaft sliding together vertically. The sliding sleeve has symmetrically provided through slots. Two of each of the first connecting seat, the second connecting seat, the first connecting rod, the second connecting rod, the connecting frame, and the counterweight are symmetrically arranged. The first connecting seat is fixedly connected to the top of the outer peripheral wall of the sliding sleeve, and the second connecting seat is fixedly connected to the bottom of the outer peripheral wall of the rotating shaft, with the second connecting seat located directly below the first connecting seat. One end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the first connecting rod is hinged to the first connecting seat, and the other end of the second connecting rod is hinged to the second connecting seat. The end of the first connecting rod away from the first connecting seat is fitted with a counterweight via the connecting frame.

[0014] A further feature of the present invention is that a connecting ring is fixedly fitted on the rotating shaft, a reset spring is fixedly connected to the lower surface of the connecting ring, the bottom end of the reset spring is fixedly connected to the upper surface of the sliding sleeve, and a limit strip is fixedly provided on the rotating shaft.

[0015] A further configuration of the present invention is as follows: the transmission assembly includes a transmission ring, a traction rope, and a slider. The transmission ring is slidably disposed inside the first filter tank and is located above the scraper. Sliders are fixedly installed on both sides of the upper surface of the scraper. A groove is formed on the lower surface of the transmission ring. The groove has an annular structure. Both sliders are slidably disposed within the groove. Multiple traction ropes are provided. One end of the traction rope is fixedly connected to the transmission ring, and the other end of the traction rope is fixedly connected to the lifting plate. Multiple rope-passing channels are formed on the inner wall of the first filter tank, and the traction rope passes through the rope-passing channels.

[0016] A further feature of the present invention is that a liquid inlet 2 is provided at the top of the two side walls of the filter tank, and a valve 2 is provided on the liquid inlet 2.

[0017] In summary, the present invention has the following beneficial effects: The present invention solves the technical problems of coolant waste, insufficient filtration cleanliness, and inability to achieve efficient resource recycling in the prior art by setting up a filter tank, water pump, circulation pipeline, filter element and multi-stage filtration mechanism. By using a cleaning fluid that is miscible with oil-based coolant to circulate and flush away impurities, the coolant adsorbed and wrapped on the surface of impurities can be peeled off and recovered. After filtration by the filter element and subsequent separation treatment, the coolant can be reused, reducing resource loss and production costs. This invention effectively solves the technical problems of difficult filter screen cleaning, filter hole clogging, low efficiency of manual cleaning, and easy damage to filter components in the prior art by coordinating the impurity filtration component, the impurity cleaning component, the transmission component, and the air pump. The impurity cleaning component can use centrifugal force to make the scraper automatically stick to the filter screen to remove impurities. With the help of the transmission component, the sealing disc drives the filter hole to seal, and the air pump introduces airflow to assist in the removal of impurities. The automatic cleaning of impurities on the filter screen can be completed without manual disassembly. This not only avoids the filter screen from being deformed by pressure and wear, thus extending the service life of the filter components, but also ensures the flow efficiency and operational stability of coolant filtration, and greatly improves the convenience and efficiency of impurity cleaning. Attached Figure Description

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the filter tank of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 This is a cross-sectional view of the filter tank 2 of the present invention; Figure 6 This is a schematic diagram of the structure of the cleaning component and the impurity filtering component of the present invention; Figure 7 This is a schematic diagram of the structure of the rotating shaft and telescopic component of the present invention; Figure 8 This is a schematic diagram of the scraper structure of the present invention; Figure 9 This is a cross-sectional view of the transmission ring of the present invention; Figure 10 This is a schematic diagram of the lifting plate and sealing plate of the present invention.

[0019] In the diagram: 1. Base; 2. Filter tank one; 201. Tank cover; 202. Liquid inlet one; 203. Rope threading channel; 204. Liquid outlet one; 3. Filter tank two; 4. Impurity removal channel; 5. Circulation pipeline; 6. Water pump; 7. Liquid outlet two; 8. Valve one; 9. Filter element; 10. Liquid inlet two; 11. Valve two; 12. Support ring; 13. Filter screen; 14. Air pump; 15. Air supply pipeline; 16. Motor; 17. Scraper; 18. 1801. Rotating shaft; 19. Limiting strip; 10. Sliding sleeve; 11. Through groove; 22. Connecting seat one; 23. Connecting seat two; 24. Connecting rod one; 25. Connecting rod two; 26. Connecting frame; 27. Counterweight; 28. Connecting ring; 29. ​​Return spring; 20. Lifting plate; 30. Sealing plate; 31. Spring; 32. Guide post; 33. Traction rope; 34. Transmission ring; 35. Sliding groove; 36. Sliding block; 37. Multi-stage filtration mechanism. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Please see Figures 1-5 In this embodiment of the invention, a circulating filtration system for heat treatment coolant includes a base 1, a filter tank 2 fixedly mounted on the base 1, a filter tank 3 fixedly mounted on one side of the filter tank 2, and an impurity filtration assembly disposed inside the filter tank 2. A discharge channel 4 is provided at the top of the side wall of the filter tank 2, and the discharge channel 4 is inclined. A cleaning assembly is disposed inside the filter tank 2, which is used to input impurities filtered out by the impurity filtration assembly into the filter tank 3 through the discharge channel 4. A water pump 6 is fixedly installed at the bottom of the filter tank 2 3. The inlet end of the water pump 6 is connected to the filter tank 2 3. The outlet end of the water pump 6 is connected to the drain port 2 7. A valve 1 8 is installed on the drain port 2 7. A circulation pipe 5 is fixedly installed on the filter tank 2 3. The top end of the circulation pipe 5 is connected to the top of the inner cavity of the filter tank 2 3. The bottom end of the circulation pipe 5 is connected to the drain port 2 7. The end of the impurity discharge channel 4 away from the filter tank 2 is connected to the top of the circulation pipe 5. A filter element 9 is fixedly installed inside the filter tank 2 3.

[0022] In practical use, the heat treatment coolant to be filtered is fed into filter tank 2 through inlet 202. After entering filter tank 2, the heat treatment coolant passes through the impurity filtration assembly to filter impurities in the coolant. The filtered coolant is discharged and collected through outlet 204. When a large amount of impurities accumulate on the impurity filtration assembly, the impurities filtered by the impurity filtration assembly are fed into filter tank 3 through outlet 4. When there are many impurities in filter tank 3, cleaning fluid is fed into filter tank 3 through inlet 10, so that the impurities are immersed in the cleaning fluid, allowing the coolant on the surface of the impurities to penetrate into the cleaning fluid. At the same time, water pump 6 is turned on, so that the cleaning fluid in filter tank 3 is drawn into circulation pipe 5 through outlet 7 and then into filter tank 3 to form a liquid flow, so that the cleaning fluid repeatedly washes the impurities. After washing is completed, valve 8 is opened, so that outlet 7 is opened, and the cleaning fluid mixed with coolant is discharged for recycling, so as to recover the coolant adhering to the surface of the impurities.

[0023] The coolant is an oil-based coolant, and the impurities are scale, carbon slag, iron powder, etc. The cleaning fluid can be light kerosene, diesel oil, or special cleaning oil that is miscible with the oil-based coolant. This type of cleaning fluid can fully mix with the oil-based coolant. Through wetting and rinsing, the oil-based coolant adsorbed and wrapped on the surface of solid impurities such as scale, carbon slag, and iron powder is peeled off and dissolved. Then, the solid impurities in the cleaning fluid are intercepted and filtered through the filter element 9 in the filter tank 2 3 to obtain a mixed cleaning fluid containing effective coolant. The mixed cleaning fluid can be separated from the oil-based coolant by distillation, rectification, or oil-water separation. The separated oil-based coolant can be recycled back into the heat treatment cooling process, realizing the efficient recovery and reuse of coolant resources, reducing production costs and resource waste.

[0024] In this embodiment, preferably, the top of the side wall of the filter tank 2 3 is provided with a liquid inlet 2 10, and a valve 2 11 is provided on the liquid inlet 2 10; the cleaning fluid is input into the filter tank 2 3 through the liquid inlet 2 10, and closing the valve 2 11 can stop the input of the cleaning fluid. Both the filter tank 2 3 and the filter element 9 can be disassembled to facilitate the cleaning of impurities and the cleaning of the filter element 9.

[0025] In this embodiment, preferably, the filter tank 2 is provided with a multi-stage filtration mechanism 35, which is located below the impurity filtration assembly. The multi-stage filtration mechanism 35 is used to filter impurities that are difficult to filter by the filter screen 13. The multi-stage filtration mechanism 35 can be composed of a coarse non-woven filter, a medium glass fiber filter, a fine sintered metal filter core 9, or a combination of multiple stainless steel filter screens 13 arranged from top to bottom. By gradually reducing the pore size, it sequentially intercepts large particulate impurities, fine particulate impurities, and micron-sized micro-impurities, thereby achieving multi-stage deep purification of the oil-based coolant, improving the cleanliness of the filtered coolant, and meeting the requirements of the heat treatment process for the cleanliness of the coolant.

[0026] Please refer to Figures 3 to 10. In this embodiment of the invention, the impurity filtration assembly includes a support ring 12 and a filter screen 13. The support ring 12 is fixedly installed inside the filter tank 2, and the filter screen 13 is fixedly installed inside the support ring 12. The filter screen 13 and the top wall of the support ring 12 are located in the same horizontal plane. The height of the filter screen 13 is the same as the height of the impurity discharge channel 4. The coolant entering the filter tank 2 is filtered through the filter screen 13, so that impurities are left on the filter screen 13 and the coolant passes through the filter screen 13.

[0027] In this embodiment, preferably, a lifting plate 28 is provided below the support ring 12, and a sealing plate 29 is fixedly installed on the upper surface of the lifting plate 28. The outer diameter of the sealing plate 29 is the same as the inner diameter of the support ring 12, so that the sealing plate 29 can be inserted into the support ring 12 to seal the through hole on the inner side of the support ring 12. A transmission component for driving the lifting plate 28 to rise and fall is provided in the filter tank 2. A spring 30 is fixedly connected to the upper surface of the lifting plate 28, and the top end of the spring 30 is fixedly connected to the lower surface of the support ring 12. A plurality of guide posts 31 are fixedly installed on the lower surface of the support ring 12. The guide posts 31 penetrate the lifting plate 28, and the lifting plate 28 and the guide posts 31 slide together to limit the movement of the lifting plate 28.

[0028] In this embodiment, preferably, the top of the side wall of the filter tank 2 is connected to an inlet 202, and the bottom of the filter tank 2 is connected to an outlet 204; an air pump 14 is fixedly installed on the base 1, and an air supply pipe 15 is connected to the air outlet of the air pump 14, and the air outlet of the air supply pipe 15 is connected to the inlet 202; in use, the pipe is connected to the inlet 202, and the coolant is input into the filter tank 2 through the inlet 202. The filtered coolant is discharged through the outlet 204, and the impurities on the filter assembly are cleaned by the impurity cleaning assembly. When the air pump 14 and valve 8 are turned on and valve 11 is turned off, the lifting plate 28 is driven to move upward through the transmission component, so that the sealing plate 29 seals the through hole inside the support ring 12 and the top wall of the sealing plate 29 fits against the filter screen 13 to push out the impurities stuck in the filter holes of the filter screen 13. The airflow generated by the air pump 14 enters the filter tank 2 through the air supply pipe 15 and the liquid inlet 202. Due to the sealing effect of the sealing plate 29, the airflow can only enter the filter tank 3 through the impurity discharge channel 4. With the cleaning effect of the impurity cleaning component, the impurities can quickly enter the filter tank 3.

[0029] In this embodiment, preferably, the cleaning assembly includes a motor 16, a rotating shaft 18, a telescopic component, and a scraper 17. A canister cover 201 is fixedly installed on the top of the filter tank 2. The motor 16 is fixedly installed on the canister cover 201. The output end of the motor 16 is connected to the rotating shaft 18 via a drive mechanism. The bottom end of the rotating shaft 18 is connected to the scraper 17 via the telescopic component. When the rotating shaft 18 is stationary, a gap is provided between the scraper 17 and the filter screen 13. The telescopic component includes a sliding sleeve 19, a first connecting seat 20, a second connecting seat 21, a first connecting rod 22, a second connecting rod 23, a connecting frame 24, and a counterweight 25. The scraper 17 is fixedly connected to the bottom end of the sliding sleeve 19, and the bottom end of the rotating shaft 18 extends into the sliding sleeve 19. Inside, the sliding sleeve 19 slides up and down with the rotating shaft 18. The sliding sleeve 19 has symmetrically symmetrical through slots 1901. Two connecting seats 20, 21, 22, 23, 24, and 25 are symmetrically arranged. The first connecting seat 20 is fixedly connected to the top of the outer peripheral wall of the sliding sleeve 19, and the second connecting seat 21 is fixedly connected to the bottom of the outer peripheral wall of the rotating shaft 18, with the second connecting seat 21 located directly below the first connecting seat 20. One end of the first connecting rod 22 is hinged to one end of the second connecting rod 23, and the other end of the first connecting rod 22 is hinged to the first connecting seat 20. The other end of the second connecting rod 23 is hinged to the second connecting seat 21. The first connecting rod 22 is located away from the connecting seat. One end of the 10 is fitted with a counterweight 25 via a connecting bracket 24. The counterweight 25 is made of a high-density metal. A connecting ring 26 is fixedly fitted onto the rotating shaft 18. A return spring 27 is fixedly connected to the lower surface of the connecting ring 26. The bottom end of the return spring 27 is fixedly connected to the upper surface of the sliding sleeve 19. A limit strip 1801 is fixedly provided on the rotating shaft 18. The limit strip 1801 ensures that the sliding sleeve 19 can only slide up and down relative to the rotating shaft 18, but cannot rotate relative to the rotating shaft 18. This allows the rotating shaft 18 to rotate, thereby driving the sliding sleeve 19 to rotate. When the motor 16 is turned on, the motor 16 drives the rotating shaft 18 to rotate, which in turn drives the sliding sleeve 19 to rotate. When the sliding sleeve 19 rotates... Under the action of centrifugal force, the counterweight 25 moves away from the sliding sleeve 19, causing the connecting rod 1 22 and the connecting rod 23 to rotate relative to each other, thereby reducing the included angle between the connecting rod 1 22 and the connecting rod 23, and thus reducing the distance between the connecting seat 1 20 and the connecting seat 21. Since the connecting seat 1 20 is fixedly connected to the non-lifting rotating shaft 18, the connecting seat 21 moves downward, thereby driving the sliding sleeve 19 to move downward until the scraper 17 is in contact with the filter screen 13, so that the rotating scraper 17 can scrape off the impurities on the filter screen 13. The high-speed rotation of the scraper 17, combined with the airflow generated by the air pump 14, allows the impurities to enter the filter tank 2 3 through the inclined impurity discharge channel 4.When the rotating shaft 18 stops rotating, under the action of the return spring 27, the sliding sleeve 19 drives the scraper 17 to move upward, causing the scraper 17 to separate from the filter screen 13. After the scraper 17 separates from the filter screen 13, it can prevent the scraper 17 from pressing against and contacting the filter screen 13 for a long time, which would cause deformation of the filter screen 13, aggravated clogging of the filter holes, or wear and damage. At the same time, it increases the flow area and flow space of the coolant, reduces the flow resistance of the coolant during filtration, ensures the flow efficiency and filtration stability of the coolant under normal filtration conditions, and extends the service life of the filter screen 13.

[0030] In this embodiment, preferably, the transmission assembly includes a transmission ring 33, traction ropes 32, and sliders 34. The transmission ring 33 is slidably disposed inside the filter tank 2 and is located above the scraper 17. Sliders 34 are fixedly installed on both sides of the upper surface of the scraper 17. A groove 3301 is formed on the lower surface of the transmission ring 33. The groove 3301 has an annular structure, and both sliders 34 are slidably disposed within the groove 3301. Multiple traction ropes 32 are provided. One end of the traction rope 32 is fixedly connected to the transmission ring 33, and the other end of the traction rope 32 is fixedly connected to the lifting plate 28. Multiple through-holes are formed on the inner wall of the filter tank 2. Rope channel 203, through which the traction rope 32 passes; when the scraper 17 moves downward, the scraper 17 drives the transmission ring 33 to move downward through the slider 34. When the transmission ring 33 moves downward, it drives the top end of the traction rope 32 to move downward, thereby causing the bottom end of the traction rope 32 to pull the lifting plate 28 upward, so as to drive the sealing plate 29 to move upward and make the sealing plate 29 fit with the filter screen 13. Thus, when the cleaning component cleans the impurities on the impurity filter component, the sealing plate 29 can automatically move upward to fit with the filter screen 13. When the rotating shaft 18 stops rotating, the lifting plate 28 can move downward to reset under the elastic action of the spring 30.

[0031] Working principle: This heat treatment coolant circulation filtration system first completes the basic filtration and impurity collection and transportation of the oil-based coolant. The oil-based coolant to be filtered is injected into the filter tank 2 through the inlet 202. Solid impurities such as oxide scale, carbon slag, and iron powder are intercepted by the filter screen 13 of the impurity filtration component. The filtered clean coolant is discharged through the outlet 204 for reuse. When the filter screen 13 accumulates a sufficient amount of impurities, the motor 16 of the cleaning component is started to drive the rotating shaft 18 to rotate. Under the action of centrifugal force, the counterweight 25 drives the telescopic component to drive the scraper. The plate 17 moves down to fit the filter screen 13, and at the same time, the scraper 17 and the linkage transmission component drive the lifting plate 28 to move up, so that the sealing plate 29 seals the through hole below the filter screen 13. With the help of the air pump 14, airflow is introduced, and the scraper 17 rotates to scrape away the impurities on the filter screen 13. The impurities are sent into the filter tank 2 3 by the airflow through the impurity discharge channel 4 and the circulation pipe 5, completing the rapid cleaning and transfer of impurities. After the rotating shaft 18 stops rotating, the reset spring 27 and the spring 30 respectively drive the scraper 17 and the sealing plate 29 to reset, so as to avoid damage to the filter screen 13 and ensure normal filtration conditions.

[0032] After impurities are fed into filter tank 2 (3), the system performs impurity flushing and coolant resource recovery. A cleaning solution, such as light kerosene or diesel oil, which is miscible with oil-based coolant, is injected into filter tank 2 (10) to wet the impurities and remove the coolant adhering to their surface. After the water pump 6 is turned on, the cleaning solution flows back to filter tank 2 (3) through drain port 2 (7) and circulation pipe 5, forming a circulating liquid flow to repeatedly flush the impurities and fully dissolve the oil-based coolant on the surface of the impurities. Subsequently, the mixture passes through the filter element 9 in filter tank 2 (3) to trap solid impurities, resulting in a mixed cleaning solution containing effective coolant. This mixture is then separated by distillation, rectification, and other separation processes to separate and recover the oil-based coolant, which can then be reused in the heat treatment process. At the same time, the multi-stage filtration mechanism 35 in filter tank 1 (2) can also trap fine impurities step by step, achieving deep purification of the coolant, further improving filtration cleanliness, and realizing the recycling of coolant and cost reduction and efficiency improvement.

[0033] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A circulating filtration system for heat treatment coolant, comprising a base (1), a filter tank one (2) fixedly disposed on the base (1), a filter tank two (3) fixedly disposed on one side of the filter tank one (2), and an impurity filtration assembly disposed inside the filter tank one (2), wherein the top of the side wall of the filter tank one (2) is provided with a discharge channel (4), characterized in that: The filter tank 1 (2) is equipped with a cleaning component inside. The cleaning component is used to input the impurities filtered by the impurity filtration component into the filter tank 2 (3) through the discharge channel (4). The bottom of the filter tank 2 (3) is fixedly equipped with a water pump (6). The inlet end of the water pump (6) is connected to the filter tank 2 (3). The outlet end of the water pump (6) is connected to the discharge port 2 (7). The discharge port 2 (7) is equipped with a valve 1 (8). The filter tank 2 (3) is fixedly equipped with a circulation pipe (5). The top end of the circulation pipe (5) is connected to the top of the inner cavity of the filter tank 2 (3). The bottom end of the circulation pipe (5) is connected to the discharge port 2 (7). The end of the discharge channel (4) away from the filter tank 1 (2) is connected to the top of the circulation pipe (5). The filter tank 2 (3) is fixedly equipped with a filter element (9).

2. The circulating filtration system for heat treatment coolant according to claim 1, characterized in that: The impurity filtration assembly includes a support ring (12) and a filter screen (13). The support ring (12) is fixedly installed inside the filter tank (2), and the filter screen (13) is fixedly installed on the inner side of the support ring (12). The filter screen (13) and the top wall of the support ring (12) are located in the same horizontal plane.

3. The circulating filtration system for heat treatment coolant according to claim 2, characterized in that: A lifting plate (28) is provided below the support ring (12). A sealing plate (29) is fixedly installed on the upper surface of the lifting plate (28). The outer diameter of the sealing plate (29) is the same as the inner diameter of the support ring (12). A transmission component for driving the lifting plate (28) to rise and fall is provided inside the filter tank (2).

4. The circulating filtration system for heat treatment coolant according to claim 3, characterized in that: A spring (30) is fixedly connected to the upper surface of the lifting plate (28). The top end of the spring (30) is fixedly connected to the lower surface of the support ring (12). A plurality of guide posts (31) are fixedly installed on the lower surface of the support ring (12). The guide posts (31) penetrate the lifting plate (28), and the lifting plate (28) and the guide posts (31) slide together.

5. The circulating filtration system for heat treatment coolant according to claim 3, characterized in that: The top of the side wall of the filter tank (2) is connected to the liquid inlet (202), and the bottom of the filter tank (2) is connected to the liquid outlet (204); an air pump (14) is fixedly installed on the base (1), and an air supply pipe (15) is connected to the air outlet of the air pump (14), and the air outlet of the air supply pipe (15) is connected to the liquid inlet (202).

6. The circulating filtration system for heat treatment coolant according to claim 4, characterized in that: The cleaning assembly includes a motor (16), a rotating shaft (18), a telescopic component, and a scraper (17). The top of the filter tank (2) is fixedly installed with a tank cover (201). The motor (16) is fixedly installed on the tank cover (201). The output end of the motor (16) is connected to the rotating shaft (18) for transmission. The bottom end of the rotating shaft (18) is connected to the scraper (17) through the telescopic component. When the rotating shaft (18) is stationary, there is a gap between the scraper (17) and the filter screen (13).

7. A circulating filtration system for heat treatment coolant according to claim 6, characterized in that: The telescopic component includes a sliding sleeve (19), a first connecting seat (20), a second connecting seat (21), a first connecting rod (22), a second connecting rod (23), a connecting frame (24), and a counterweight (25). The scraper (17) is fixedly connected to the bottom end of the sliding sleeve (19). The bottom end of the rotating shaft (18) extends into the sliding sleeve (19), and the sliding sleeve (19) and the rotating shaft (18) slide vertically together. The sliding sleeve (19) is symmetrically provided with through slots (1901). The first connecting seat (20), the second connecting seat (21), the first connecting rod (22), the second connecting rod (23), the connecting frame (24), and the counterweight (25) are all part of the telescopic component. Two are symmetrically arranged. Connecting seat one (20) is fixedly connected to the top of the outer peripheral wall of the sliding sleeve (19), and connecting seat two (21) is fixedly connected to the bottom of the outer peripheral wall of the rotating shaft (18). Connecting seat two (21) is located directly below connecting seat one (20). One end of connecting rod one (22) is hinged to one end of connecting rod two (23), and the other end of connecting rod one (22) is hinged to connecting seat one (20). The other end of connecting rod two (23) is hinged to connecting seat two (21). A counterweight block (25) is installed on the end of connecting rod one (22) away from connecting seat one (20) through connecting frame (24).

8. The circulating filtration system for heat treatment coolant according to claim 7, characterized in that: A connecting ring (26) is fixedly fitted on the rotating shaft (18). A reset spring (27) is fixedly connected to the lower surface of the connecting ring (26). The bottom end of the reset spring (27) is fixedly connected to the upper surface of the sliding sleeve (19). A limit strip (1801) is fixedly provided on the rotating shaft (18).

9. A circulating filtration system for heat treatment coolant according to claim 8, characterized in that: The transmission assembly includes a transmission ring (33), a traction rope (32), and a slider (34). The transmission ring (33) is slidably disposed inside the filter tank (2) and is located above the scraper (17). Slider (34) is fixedly installed on both sides of the upper surface of the scraper (17). A groove (3301) is provided on the lower surface of the transmission ring (33). The groove (3301) is a ring structure. Both sliders (34) are slidably disposed in the groove (3301). Multiple traction ropes (32) are provided. One end of the traction rope (32) is fixedly connected to the transmission ring (33), and the other end of the traction rope (32) is fixedly connected to the lifting plate (28). Multiple rope-threading channels (203) are provided on the inner wall of the filter tank (2). The traction rope (32) passes through the rope-threading channels (203).

10. A circulating filtration system for heat treatment coolant according to claim 1, characterized in that: The top of the side wall of the filter tank 2 (3) is connected to the liquid inlet 2 (10), and the liquid inlet 2 (10) is equipped with valve 2 (11).

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