A magnetorheological polishing liquid separation and purification device and method

Abstract

The present invention relates to the field of magnetorheological polishing, and more specifically, to a magnetorheological polishing liquid separation and purification device and method, comprising a filtering mechanism for screening large particles of the polishing liquid, a magnetic screening mechanism for magnetically separating magnetic components in the polishing liquid, a liquid storage mechanism for storing separated waste liquid, a mixing mechanism for remixing the separated polishing liquid with new abrasive, and a barrel for mounting each mechanism, wherein the filtering mechanism, magnetic screening mechanism, liquid storage mechanism, and mixing mechanism are all disposed within the barrel and are sequentially connected, and a liquid inlet and a liquid outlet are also provided on the barrel, wherein the liquid inlet is connected to the filtering mechanism, and the liquid outlet is connected to the mixing mechanism. The present invention can specifically separate the components of the magnetorheological polishing liquid after use, sequentially separate and discharge grinding chips and passivated abrasive, recover the reusable magnetic components, mix them with new abrasive to form a new magnetorheological polishing liquid for use, thereby achieving purification and sustainable utilization of the magnetorheological polishing liquid and ensuring the stability of the processing performance of the magnetorheological polishing liquid.

Description

Technical Field

[0001] The present invention relates to the field of magnetorheological polishing, and more particularly to a magnetorheological polishing liquid separation and purification device and method. Background Art

[0002] Magnetorheological polishing technology is a new surface processing method that can process complex surfaces and has the characteristics of good polishing effect and no surface / subsurface damage. In magnetorheological polishing, the performance of magnetorheological polishing fluid is one of the main factors affecting the polishing effect. Magnetorheological polishing fluid is generally composed of magnetic particles, non-magnetic abrasives, base fluid and additives. Under the action of the magnetic field, the magnetic particles are arranged along the direction of the magnetic field lines to form a chain structure and clamp the non-magnetic abrasives, forming a flexible polishing grinding head with a certain polishing ability. However, after a period of use, magnetorheological polishing fluid is prone to the following problems: (1) the passivation of non-magnetic abrasives leads to a decrease in polishing efficiency and a deterioration of the polished surface quality; (2) the increase of materials such as grinding chips and agglomeration lead to an increase in the proportion of large particles and a decrease in the accuracy of the polished surface. Therefore, it is necessary to recycle and update the magnetorheological polishing fluid.

[0003] Prior art 1 recycles magnetorheological fluid through temperature change, ionization and centrifugal action, and the recycling process does not produce new substances. However, this method only separates the base liquid from the particles, and cannot specifically separate excess substances such as passivated abrasives or large-particle grinding chips. Therefore, the magnetorheological polishing fluid cannot be effectively separated and purified. Prior art 2 absorbs the base liquid and carrier liquid in the magnetorheological polishing fluid through capillaries, and then dries and magnetically screens the solids to separate magnetic particles and other non-magnetic particles. However, this method cannot effectively remove other types of magnetorheological polishing fluids other than the base liquid and carrier liquid, and cannot remove the chemical components in the magnetorheological polishing fluid. The chemical components can easily cause the solid particles to agglomerate and bond in the subsequent drying process. Therefore, although this method can separate magnetic particles and non-magnetic substances, it cannot guarantee the particle size and morphology of the separated solid particles, which in turn leads to uncontrollable polishing performance of the magnetorheological polishing fluid.

[0004] While both of these devices can recycle magnetorheological polishing fluid, they cannot effectively recycle it, extend its service life, or guarantee stable polishing performance. Therefore, a device and method for separating and purifying magnetorheological polishing fluid and renewing abrasives in real time is urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a magnetorheological polishing fluid separation and purification device and method that can recycle and reuse the magnetorheological polishing fluid.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] Provided are a magnetorheological polishing liquid separation and purification device and method, comprising a filtering mechanism for screening large particles of the polishing liquid, a magnetic sieve mechanism for magnetically separating magnetic components in the polishing liquid, a liquid storage mechanism for storing the separated polishing liquid, a mixing mechanism for remixing the separated polishing liquid with an abrasive, and a barrel body. The filtering mechanism, magnetic sieve mechanism, liquid storage mechanism, and mixing mechanism are all arranged in the barrel body and are connected in sequence. A liquid inlet and a liquid outlet are also provided on the barrel body. The liquid inlet is connected to the filtering mechanism, and the liquid outlet is connected to the mixing mechanism.

[0008] Through this setting, the used polishing liquid is injected from the liquid inlet, and the polishing liquid first enters the filtering mechanism, where the large-particle grinding chips and agglomerated materials contained in the polishing liquid are filtered out, and the base liquid, small-particle magnetic components, and small-particle non-magnetic abrasives in the polishing liquid enter the magnetic screening mechanism; most of the base liquid and small-particle non-magnetic abrasives are not affected by the magnetic field in the magnetic screening mechanism, and directly enter the liquid storage mechanism, and a small part of the base liquid is separated along with the small-particle magnetic components under the attraction of the magnetic field, and enters the mixing mechanism; the mixing mechanism is replenished with new non-magnetic abrasives and base liquid to make the polishing liquid reach the required concentration for use, and then it is sent out through the liquid outlet.

[0009] Preferably, the filtering mechanism includes a filter screen, a vibrator and a guide plate for guiding the filtered polishing liquid. The vibrator is installed on the barrel body, the filter screen is movably connected to the barrel body through the vibrator, and the guide plate is installed below the filter screen and fixedly connected to the barrel body.

[0010] Through this setting, the vibrator and the filter can form the effect of a vibrating screen. When the polishing liquid flows to the filter, it can be fully filtered and the filtration speed is greatly improved. The polishing liquid splashed after vibration filtration is collected by the guide plate at the bottom and concentrated in one place to enter the magnetic screen mechanism.

[0011] Furthermore, the filtering mechanism further includes a first discharge pipe, the filter screen is arranged at an angle, and the first discharge pipe is passed through the barrel and is located at the lower side of the filter screen.

[0012] With this arrangement, the grinding chips screened out by the filter can fall along the inclined surface under the action of vibration and be discharged through the first discharge pipe.

[0013] Furthermore, the filter screens are provided with multiple layers, and the filter screens form a group of two, and a group of filter screens are respectively installed on the upper and lower sides of the vibrator.

[0014] This arrangement can further improve the screening quality of the filter and classify waste materials of different sizes.

[0015] Furthermore, the guide plate is a conical funnel structure, with a conical protrusion in the middle and a circular array of openings on the sides of the conical protrusion.

[0016] Through this arrangement, the polishing liquid splashed in the filter mechanism due to vibration filtration can be drained to the opening and flow down, making it easier to carry out the next processing step.

[0017] Preferably, the magnetic sieve mechanism includes a magnetic sieve drum, a magnet group for adsorbing magnetic components, a first channel for guiding the magnetic components separated by magnetic attraction, and a second channel for guiding the non-magnetic components. The first channel is arranged on the inner wall of the magnetic sieve drum, the second channel is arranged in the middle of the magnetic sieve drum, the first channel and the second channel merge at the top, the magnet group is arranged beside the outer wall of the magnetic sieve drum, the first channel is connected to the mixing mechanism, and the second channel is connected to the liquid storage mechanism.

[0018] Through this arrangement, the inside of the magnetic sieve drum has a strong magnetic field due to the magnet group, which attracts magnetic materials to the side of the drum wall. When the polishing liquid output by the filtering mechanism enters the magnetic sieve mechanism, it first enters the junction of the first channel and the second channel at the top of the magnetic sieve drum, and under the action of the magnetic field, the magnetic components in the polishing liquid are close to the drum wall and enter the first channel, while the non-magnetic components in the polishing liquid are not attracted and enter the second channel in the middle, so that the magnetic components that need to be recovered enter the mixing mechanism to be mixed into new polishing liquid, and the non-magnetic components that need to be replaced enter the liquid storage mechanism to be taken out and processed.

[0019] Furthermore, the magnetic screen mechanism also includes a rotating mechanism, and the magnetic screen drum is rotatably connected to the frame through the rotating mechanism. A continuous spiral baffle is also provided on the inner wall of the magnetic screen drum, and the spiral baffle spirals downward along the inner wall of the magnetic screen drum, and the spiral baffle is arranged at an angle. The end of the spiral baffle close to the magnetic screen drum wall is higher than the end away from the magnetic screen drum wall in the cross section, and the first channel is formed along the spiral line direction of the spiral baffle, and the hollow channel in the middle of the spiral baffle constitutes the second channel.

[0020] With this arrangement, the magnetic sieve drum keeps rotating under the action of the rotating mechanism, and the polishing liquid flowing down from the opening of the guide plate falls onto the spiral baffle. Because the spiral baffle is tilted downward, the non-magnetic abrasive and most of the base liquid flow directly to the middle under the action of gravity, flow down from the side of the spiral baffle away from the drum wall and pass through the middle of the magnetic sieve drum and fall down; the magnetic components are affected by the magnet group arranged on the outer wall of the magnetic sieve drum, and adhere to the side of the spiral baffle close to the magnetic sieve drum wall. At this time, the horizontal magnetic attraction of the magnetic field and the combined force of the gravity of the magnetic components themselves and the supporting force of the spiral baffle offset each other. When the magnetic sieve drum drives the spiral baffle to rotate, the transient method is used to analyze the magnetic components. The spiral baffle rotates along the rotation direction and separates from the magnetic components. The magnetic components lose their supporting force and are only affected by magnetic attraction and gravity. Therefore, they will fall along the wall of the magnetic sieve drum until they come into contact with the spiral baffle at the lower section and the force balance state is restored. Because from a continuous perspective, when the magnetic sieve drum rotates, the magnetic components will flow downward along the spiral trajectory of the spiral baffle and eventually fall at the end of the spiral baffle. The separated non-magnetic abrasive and base liquid eventually enter the liquid storage mechanism, and the magnetic components enter the mixing mechanism.

[0021] Furthermore, a second outlet and a first outlet are provided at the bottom of the magnetic sieve drum, the projection of the first outlet in the vertical direction is covered by the spiral baffle, and the projection of the second outlet in the vertical direction is at the edge of the spiral baffle close to the center side of the magnetic sieve drum, the second outlet is connected to the liquid storage mechanism, and the first outlet is connected to the mixing mechanism.

[0022] Through this arrangement, the non-magnetic abrasive and base liquid flowing down from the side of the spiral baffle and falling to the center of the bottom of the magnetic sieve drum can flow into the second outlet and enter the liquid storage mechanism, and the magnetic abrasive flowing down along the spiral baffle close to the wall of the magnetic sieve drum finally flows into the first outlet and enters the mixing mechanism, and the two are separated.

[0023] Furthermore, a magnet slot is provided on the outside of the magnetic sieve drum, and the magnet slot is fixedly connected to the drum body. The magnet group is composed of several annular magnets installed in the magnet slot, and the adjacent annular magnets are installed with different magnetic poles.

[0024] Furthermore, the magnet slot is located in the upper middle portion of the outer side of the magnetic sieve drum, and the bottom of the magnetic sieve drum is not affected by the magnetic field. With this arrangement, when the magnetic components fall along the spiral baffle to the bottom of the magnetic sieve drum, they can smoothly enter the first outlet without being affected by the magnetic field and thus accumulating.

[0025] Furthermore, the magnets used in the magnet assembly are neodymium iron boron permanent magnets. Neodymium iron boron permanent magnets have high magnetic properties and, as practical magnets, offer optimal magnetic properties in creating strong magnetic fields. This ensures the strength of the magnetic field within the sieve drum, allowing magnetic components that fall onto the top spiral baffle to be quickly attracted and prevented from falling off the sides, thus ensuring reliable separation.

[0026] Preferably, the liquid storage mechanism includes a first liquid storage tank and a second discharge pipe, the first liquid storage tank is communicated with the second channel, and the second discharge pipe is passed through the barrel and communicated with the first liquid storage tank.

[0027] With this arrangement, the non-magnetic abrasive and waste liquid entering the first liquid storage bin can be collected and recycled.

[0028] Preferably, the mixing mechanism includes a second liquid storage tank for storing the polishing liquid after the magnetic screen, a feed part for adding polishing liquid components, a first agitator for mixing new components with old polishing liquid, and a probe for detecting the viscosity of the old polishing liquid. The second liquid storage tank is connected to the first channel, the feed part is arranged on the barrel and is connected to the second liquid storage tank, the first agitator and the probe are both arranged in the second liquid storage tank, and the liquid outlet is connected to the second liquid storage tank.

[0029] With this setting, when the sieved magnetic components enter the second liquid storage tank, the probe will automatically detect the fluid concentration, and then the required non-magnetic abrasive and base liquid can be added according to the concentration through the feed part, so that the content of each component of the sieved polishing liquid can reach the usage standard again and become a new polishing liquid. The first agitator mixes the various components with the base liquid evenly, and the new polishing liquid is sent out through the liquid outlet after it becomes a usable new polishing liquid.

[0030] Furthermore, the mixing mechanism also includes an automatic feeding mechanism, which is installed between the feeding part and the second liquid storage bin. A number of storage bins are provided in the automatic feeding mechanism, and the feeding part is provided with a number of channels corresponding to the number of storage bins. The channels correspond one-to-one with the storage bins. An independently controlled discharge port is also provided at the bottom of the storage bin, and the automatic feeding mechanism is also provided with a stirring bin, in which a second agitator is provided and connected to the discharge port.

[0031] With this setting, materials of different components are pre-placed in the automatic feeding mechanism when replenishing materials, and materials of different components are placed in different storage bins. When the probe detects the viscosity of the polishing liquid after screening, the automatic feeding mechanism can calculate and output the required amount of materials from different storage bins to the polishing liquid, so that the components in the polishing liquid reach the preset percentage.

[0032] Furthermore, a gravity sensor is provided at the bottom of the storage bin, and the gravity sensor can detect the weight of the material in the storage bin and control the discharge of the material from the discharge port, thereby accurately controlling the amount of each component added to the polishing liquid.

[0033] Furthermore, the magnetorheological polishing liquid separation and purification device also includes an air pressure control mechanism for controlling the air pressure in the device. The air pressure control mechanism is arranged above the filtering mechanism. The air pressure control mechanism includes a motor, fan blades and an air filter. The motor is fixedly connected to the barrel body, and the fan blades are connected to the motor output shaft. A vent is also provided on the barrel body. The air filter is detachably connected to the barrel body and is located between the fan blades and the filtering mechanism.

[0034] With this setting, the motor can control the forward and reverse rotation of the fan blades to exhaust or ventilate the inside of the cylinder to form corresponding negative pressure or positive pressure, thereby controlling the inflow and outflow of polishing liquid or the discharge of waste, and the filter can prevent dust and impurities in the air from mixing into the polishing liquid during intake or exhaust.

[0035] Preferably, both the first discharge pipe and the second discharge pipe are provided with switches.

[0036] A method for separating and purifying a magnetorheological polishing fluid, using the above-mentioned magnetorheological polishing fluid separation and purification device, comprises the following steps:

[0037] S1: Turn on the power, and the external polishing liquid enters the filter mechanism inside the device from the liquid inlet;

[0038] S2: The polishing liquid is screened in the filter mechanism, and the grinding debris and large particles that exceed the size setting range are screened out. The polishing liquid components that meet the size setting range pass through the filter mechanism and enter the magnetic screening mechanism;

[0039] S3: The polishing liquid entering the magnetic screen mechanism is separated from the magnetic components and non-magnetic abrasive by the magnetic field; the non-magnetic abrasive and most of the base liquid enter the liquid storage mechanism, and the magnetic components and a small amount of water enter the mixing mechanism;

[0040] S4: After the polishing liquid entering the mixing mechanism is tested, the amount of non-magnetic abrasive and base liquid that needs to be replenished is calculated. After the new non-magnetic abrasive and base liquid are replenished, the mixing mechanism mixes the new components with the old polishing liquid evenly and outputs them through the liquid outlet.

[0041] Preferably, in step S3, when the polishing liquid enters the magnetic screen mechanism, it first falls on the spiral baffle of the magnetic screen mechanism. Because the spiral baffle is tilted, the non-magnetic abrasive and most of the base liquid slide along the tilt direction of the spiral baffle to the bottom center area of ​​the magnetic screen cylinder, and finally enter the liquid storage mechanism through the second outlet close to the center area. The old polishing liquid with magnetic components clings to the side of the spiral baffle close to the wall of the magnetic screen cylinder under the magnetic attraction of the magnet group, and falls along the spiral baffle as the magnetic screen cylinder rotates continuously, and finally flows out at the end of the spiral baffle track and enters the mixing mechanism connected to the first outlet.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] (1) Targeted material separation is achieved for the magnetorheological polishing fluid. The grinding chips and the passivated abrasive are separated and discharged in sequence. The magnetic components with reusable characteristics are recovered and mixed with new abrasives to form a new magnetorheological polishing fluid. This achieves the purification and sustainable utilization of the magnetorheological polishing fluid and ensures the stability of the processing performance of the magnetorheological polishing fluid.

[0044] (2) The recovery and filtration process is highly automated and the process is perfect. The recovered magnetorheological polishing fluid does not need to be processed again before use, which greatly improves the convenience of processing.

[0045] (3) The process is simple, and the abrasive type and concentration of the magnetorheological polishing fluid can be adjusted according to the polishing process. The performance of the recovered magnetorheological polishing fluid is stable, which greatly saves processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of the internal structure of a magnetorheological polishing liquid separation and purification device of the present invention;

[0047] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0048] Figure 3 Schematic diagram of the magnetic sieve drum structure of the magnetorheological polishing liquid separation and purification device of the present invention;

[0049] Figure 4 Schematic diagram of the internal structure of the magnetic sieve drum of the magnetorheological polishing liquid separation and purification device of the present invention;

[0050] Figure 5 This is a schematic diagram of the first channel of the magnetorheological polishing liquid separation and purification device of the present invention;

[0051] Figure 6 This is a schematic diagram of the second channel of the magnetorheological polishing liquid separation and purification device of the present invention;

[0052] Figure 7 Schematic diagram of magnetic field diversion of the magnetic sieve drum of the magnetorheological polishing liquid separation and purification device of the present invention (wherein the black particles are magnetic components, the white particles are non-magnetic components, and the dotted lines are magnetic induction lines);

[0053] Figure 8 This is a schematic structural diagram of the automatic feeding mechanism of the magnetorheological polishing liquid separation and purification device of the present invention.

[0054] The icon marks are explained as follows:

[0055] 1. Filter mechanism; 11. Filter screen; 12. Vibrator; 13. First discharge pipe; 14. Guide plate; 2. Magnetic screen mechanism; 21. Magnetic screen drum; 22. Spiral baffle; 23. Magnet group; 24. Magnet slot; 25. Rotating mechanism; 26. First channel; 27. Second channel; 28. First outlet; 29. ​​Second outlet; 3. Liquid storage mechanism; 31. First liquid storage tank; 32. Second discharge pipe; 4. Mixing mechanism; 41. Second liquid storage bin; 42. Feeding unit; 43. First agitator; 44. Probe; 45. Automatic feeding mechanism; 451. Storage bin; 452. Agitating bin; 453. Second agitator; 454. Gravity sensor; 455. Discharge port; 5. Air pressure control mechanism; 51. Motor; 52. Air vent; 53. Fan blade; 54. Air filter; 6. Cylinder body; 61. Liquid inlet; 62. Liquid outlet; 63. Switch; 64. One-way valve. DETAILED DESCRIPTION

[0056] The present invention is further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0057] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0058] Example 1

[0059] The following is a first embodiment of a magnetorheological polishing liquid separation and purification device of the present invention, comprising a filtering mechanism 1 for screening large particles of the polishing liquid, a magnetic screen mechanism 2 for magnetically separating magnetic components in the polishing liquid, a liquid storage mechanism 3 for storing the separated waste liquid, a mixing mechanism 4 for remixing the separated polishing liquid with the abrasive, and a barrel 6 for installing the above-mentioned mechanisms. The filtering mechanism 1, the magnetic screen mechanism 2, the liquid storage mechanism 3 and the mixing mechanism 4 are all arranged in the barrel 6 and are connected in sequence. A liquid inlet 61 and a liquid outlet 62 are also provided on the barrel 6. The liquid inlet 61 is connected to the filtering mechanism 1, and the liquid outlet 62 is connected to the mixing mechanism 4.

[0060] Through this arrangement, the used polishing liquid is injected from the liquid inlet 61, and the polishing liquid first enters the filtering mechanism 1, where the large-particle grinding chips and agglomerated materials contained in the polishing liquid are filtered out, and the base liquid, small-particle magnetic components, and small-particle non-magnetic abrasives in the polishing liquid enter the magnetic screening mechanism 2; most of the base liquid and small-particle non-magnetic abrasives are not affected by the magnetic field in the magnetic screening mechanism 2, and directly enter the liquid storage mechanism 3, and a small part of the base liquid is separated along with the small-particle magnetic components under the attraction of the magnetic field, and enters the mixing mechanism 4; the mixing mechanism 4 is replenished with new non-magnetic abrasives and base liquid to make the polishing liquid reach the required concentration for use, and then it is sent out through the liquid outlet 62.

[0061] As an embodiment of the present invention, the filtering mechanism 1 includes a filter screen 11, a vibrator 12 and a guide plate 14 for guiding the filtered polishing liquid. The vibrator 12 is installed on the cylinder body 6. The filter screen 11 is movably connected to the cylinder body 6 through the vibrator 12. The guide plate 14 is installed below the filter screen 11 and is fixedly connected to the cylinder body 6.

[0062] Through this setting, the vibrator 12 and the filter 11 can form the effect of a vibrating screen. When the polishing liquid flows to the filter 11, it can be fully filtered and the filtration speed is greatly improved. The polishing liquid splashed after vibration filtration is collected by the guide plate 14 at the bottom and concentrated in one place to enter the magnetic screen mechanism 2.

[0063] As an embodiment of the present invention, the magnetic sieve mechanism 2 includes a magnetic sieve drum 21, a magnet group 23 for adsorbing magnetic components, a first channel 26 for guiding the magnetic components separated by magnetic attraction, and a second channel 27 for guiding the non-magnetic components. The first channel 26 is arranged on the inner wall of the magnetic sieve drum 21, the second channel 27 is arranged in the middle of the magnetic sieve drum 21, the first channel 26 and the second channel 27 merge at the top, the magnet group 23 is arranged on the side of the outer wall of the magnetic sieve drum 21, the first channel 26 is connected to the mixing mechanism 4, and the second channel 27 is connected to the liquid storage mechanism 3.

[0064] Through this arrangement, the inside of the magnetic sieve drum 21 has a strong magnetic field due to the magnet group 23, which attracts magnetic substances to the side of the drum wall. When the polishing liquid output by the filtering mechanism 1 enters the magnetic sieve mechanism 2, it first enters the junction of the first channel 26 and the second channel 27 at the top of the magnetic sieve drum 21, and under the action of the magnetic field, the magnetic components in the polishing liquid are close to the drum wall and enter the first channel 26, and the non-magnetic components in the polishing liquid are not attracted and enter the second channel 27 in the middle, so that the magnetic components that need to be recovered enter the mixing mechanism 4 to be mixed into new polishing liquid, and the non-magnetic components that need to be replaced enter the liquid storage mechanism 3 to be taken out and processed.

[0065] As an embodiment of the present invention, the magnetic screen mechanism 2 also includes a rotating mechanism 25, and the magnetic screen drum 21 is rotatably connected to the frame through the rotating mechanism 25. A continuous spiral baffle 22 is also provided on the inner wall of the magnetic screen drum 21. The spiral baffle 22 spirals downward along the inner wall of the magnetic screen drum 21, and the spiral baffle 22 is inclined. The end of the spiral baffle 22 close to the wall of the magnetic screen drum 21 is higher than the end away from the wall of the magnetic screen drum 21 in the cross section. A first channel 26 is formed along the spiral line direction of the spiral baffle 22, and the hollow channel in the middle of the spiral baffle 22 constitutes a second channel 27.

[0066] With this arrangement, the magnetic sieve drum 21 keeps rotating under the action of the rotating mechanism 25, and the polishing liquid flowing down from the guide plate 14 falls on the spiral baffle 22. Because the spiral baffle 22 is arranged to be tilted downward, the non-magnetic abrasive and most of the base liquid directly flow down to the middle under the action of gravity, flow down from the side of the spiral baffle 22 away from the drum wall and pass through the middle of the magnetic sieve drum 21 and fall down; the magnetic component is affected by the magnet group 23 arranged on the outer wall of the magnetic sieve drum 21, and adheres to the side of the spiral baffle 22 close to the wall of the magnetic sieve drum 21. At this time, the horizontal magnetic attraction of the magnetic field and the combined force of the gravity of the magnetic component itself and the supporting force of the spiral baffle 22 offset each other. When the magnetic sieve drum 21 drives the spiral baffle 22 to rotate, the transient method is used to analyze the magnetic components. The spiral baffle 22 rotates along the rotation direction and separates from the magnetic components. The magnetic components lose their supporting force and are only subjected to magnetic attraction and gravity. Therefore, they will fall along the wall of the magnetic sieve drum 21 until they contact the spiral baffle 22 at the lower section and restore the force balance state; because from a continuous point of view, when the magnetic sieve drum 21 rotates, the magnetic components will flow downward along the spiral trajectory of the spiral baffle 22 and finally fall at the end of the spiral baffle 22. The separated non-magnetic abrasive and base liquid finally enter the liquid storage mechanism 3, and the magnetic components enter the mixing mechanism 4.

[0067] As an embodiment of the present invention, a second outlet 29 and a first outlet 28 are provided at the bottom of the magnetic sieve drum 21. The projection of the first outlet 28 in the vertical direction is covered by the spiral baffle 22, and the projection of the second outlet 29 in the vertical direction is at the edge of the spiral baffle 22 close to the center side of the magnetic sieve drum 21. The second outlet 29 is connected to the liquid storage mechanism 3, and the first outlet 28 is connected to the mixing mechanism 4.

[0068] Through this arrangement, the non-magnetic abrasive and base liquid flowing down from the side of the spiral baffle 22 and falling to the bottom center of the magnetic sieve drum 21 can flow into the second outlet 29 and enter the liquid storage mechanism 3, and the magnetic abrasive flowing down along the spiral baffle 22 close to the wall of the magnetic sieve drum 21 finally flows into the first outlet 28 and enters the mixing mechanism 4, and the two are separated.

[0069] As one embodiment of the present invention, the liquid storage mechanism 3 includes a first liquid storage tank 31 and a second discharge pipe 32 . The first liquid storage tank 31 is connected to the second channel 27 . The second discharge pipe 32 is passed through the barrel 6 and is connected to the first liquid storage tank 31 .

[0070] With this arrangement, the non-magnetic abrasive and waste liquid entering the first liquid storage bin 31 can be collected and recycled.

[0071] As an embodiment of the present invention, the mixing mechanism 4 includes a second liquid storage tank 41 for storing the polishing liquid after the magnetic screen, a feed part 42 for adding polishing liquid components, a first agitator 43 for mixing new components with old polishing liquid, and a probe 44 for detecting the viscosity of the old polishing liquid. The second liquid storage tank 41 is connected to the first channel 26, the feed part 42 is passed through the cylinder body 6 and is connected to the second liquid storage tank 41, the first agitator 43 and the probe 44 are both arranged in the second liquid storage tank 41, and the liquid outlet 62 is connected to the second liquid storage tank 41.

[0072] With this arrangement, non-magnetic abrasive and base liquid can be pre-replenished to the automatic feeding mechanism 45 through the feeding part 42. When the screened magnetic component enters the second liquid storage tank 41, the probe 44 will automatically detect the fluid concentration and synchronously feed it to the automatic feeding mechanism 45. The feeding mechanism replenishes the required non-magnetic abrasive and base liquid according to the concentration, so that the content of each component of the polishing liquid after screening reaches the usage standard again and becomes a new polishing liquid. The first agitator 43 mixes the various components with the base liquid evenly, and the new polishing liquid is sent out through the liquid outlet 62 after it becomes usable.

[0073] As an embodiment of the present invention, the mixing mechanism 4 also includes an automatic feeding mechanism 45, which is arranged between the feeding part 42 and the second liquid storage bin 41. A number of storage bins 451 are provided in the automatic feeding mechanism 45, and the feeding part 42 is provided with a number of channels corresponding to the number of storage bins 451. The channels correspond one-to-one to the storage bins 451. An independently controlled discharge port 455 is also provided at the bottom of the storage bin 451. The automatic feeding mechanism 45 is also provided with a stirring bin 452, and a second agitator 453 is provided in the stirring bin 452 and is connected to the discharge port 455.

[0074] With this arrangement, different components of materials are pre-placed in the automatic feeding mechanism 45 when replenishing materials, and the different components of materials are placed in different storage bins 451. When the probe 44 detects the viscosity of the polishing liquid after screening, the automatic feeding mechanism 45 can calculate and output the required amount of materials from different storage bins 451 to the polishing liquid, so that each component in the polishing liquid reaches the preset percentage.

[0075] As an embodiment of the present invention, the magnetorheological polishing liquid separation and purification device also includes an air pressure control mechanism 5 for controlling the air pressure in the device. The air pressure control mechanism 5 is arranged above the filter mechanism 1. The air pressure control mechanism 5 includes a motor 51, fan blades 53 and an air filter 54. The motor 51 is fixedly connected to the barrel 6, and the fan blades 53 are connected to the output shaft of the motor 51. A vent 52 is also provided on the barrel 6. The air filter 54 is detachably connected to the barrel 6 and is located between the fan blades 53 and the filter mechanism 1.

[0076] Through this setting, the motor 51 can control the forward and reverse rotation of the fan blades 53 to exhaust or ventilate the inside of the barrel 6 to form a corresponding negative pressure or positive pressure, thereby controlling the inflow and outflow of polishing liquid or the discharge of waste, and the filter can prevent dust and impurities in the air from mixing into the polishing liquid during intake or exhaust.

[0077] Example 2

[0078] like Figures 1 to 8 The second embodiment of the present invention is shown. This embodiment is similar to the first embodiment, except that the structures of the filtering mechanism 1, the magnetic screen mechanism 2 and the mixing mechanism 4 are different.

[0079] As an embodiment of the present invention, the filter mechanism 1 further includes a first discharge pipe 13 . The filter screen 11 is tilted. The first discharge pipe 13 is passed through the barrel 6 and is located at the lower side of the filter screen 11 .

[0080] With this arrangement, the grinding debris screened out by the filter screen 11 can fall along the inclined surface under the action of vibration and be discharged through the first discharge pipe 13 .

[0081] As an embodiment of the present invention, further, the filter screen 11 is provided with multiple layers, and the filter screens form a group of two, and a group of filter screens is respectively installed on the upper and lower sides of the vibrator 12.

[0082] By adopting this arrangement, the screening quality of the filter screen 11 can be further improved, and waste materials of different sizes can be classified.

[0083] As one embodiment of the present invention, the guide plate 14 is a conical funnel structure, with a conical protrusion in the middle and a circumferential array of openings on the sides of the conical protrusion.

[0084] With this arrangement, the polishing liquid splashed in the filter mechanism 1 due to vibration filtration can be guided to flow down the opening, making it easier to carry out the next processing step.

[0085] As an embodiment of the present invention, the air pressure control mechanism 5 is installed on the top of the filter mechanism 1, and an air filter 54 is provided between the two. The air filter 54 and the cylinder body 6 are detachable.

[0086] This arrangement prevents dust and impurities in the air from mixing into the polishing liquid during air intake or exhaust.

[0087] As one embodiment of the present invention, a one-way valve 64 is provided on each of the liquid inlet 61 and the liquid outlet 62. With this arrangement, when the air pressure control mechanism 5 increases the internal air pressure, the liquid outlet 62 can discharge liquid independently without causing the liquid inlet 61 to also discharge liquid; and when the internal air pressure decreases, the liquid inlet 61 can be allowed to flow in independently without causing the liquid inlet 61 to also flow in.

[0088] As an embodiment of the present invention, a magnet slot 24 is further provided on the outside of the magnetic screen drum 21 , and the magnet slot 24 is fixedly connected to the drum body 6 . The magnet group 23 is composed of several annular magnets installed in the magnet slot 24 , and adjacent annular magnets are installed with different magnetic poles.

[0089] Furthermore, the magnet slot 24 is located in the upper middle portion of the outer side of the magnetic sieve drum 21, and the bottom of the magnetic sieve drum 21 is not affected by the magnetic field. With this arrangement, when the magnetic components fall along the spiral baffle 22 to the bottom of the magnetic sieve drum 21, they can smoothly enter the first outlet 28 without being affected by the magnetic field and thus accumulating.

[0090] In one embodiment of the present invention, the magnets used in magnet assembly 23 are neodymium iron boron permanent magnets. Neodymium iron boron permanent magnets have high magnetic properties and, as practical magnets, offer optimal magnetic properties in creating strong magnetic fields. This ensures the strength of the magnetic field within the magnetic sieve drum 21, allowing magnetic components that fall onto the top spiral baffle 22 to be quickly attracted and prevented from falling off the sides, thereby ensuring reliable separation.

[0091] As an embodiment of the present invention, a plurality of storage bins 451 are provided in the automatic feeding mechanism 45, and the feeding part 42 is provided with a plurality of channels corresponding to the number of storage bins 451. The channels correspond one-to-one to the storage bins 451, and an independently controlled discharge port 455 is also provided at the bottom of the storage bin 451.

[0092] With this arrangement, materials of different components can be pre-placed in the automatic feeding mechanism 45 when replenishing materials, and materials of different components can be placed in different storage bins 451. When the probe 44 detects the viscosity of the polishing liquid after screening, the required amount of material can be output from different storage bins 451 to the polishing liquid through calculation, so that each component in the polishing liquid reaches a preset percentage.

[0093] As one embodiment of the present invention, a gravity sensor 454 is provided at the bottom of the storage bin 451. The gravity sensor 454 can detect the weight of the material in the storage bin 451 and control the discharge of the material from the discharge port 455, thereby accurately controlling the amount of each component added to the polishing liquid.

[0094] As an embodiment of the present invention, both the first discharge pipe 13 and the second discharge pipe 32 are provided with a switch 63 .

[0095] Example 3

[0096] A method for separating and purifying a magnetorheological polishing liquid, comprising the magnetorheological polishing liquid separation and purification device of any one of Embodiments 1 or 2, comprising the following steps:

[0097] S1: Turn on the power supply, and the external polishing liquid enters the filter mechanism 1 inside the device from the liquid inlet 61;

[0098] S2: The polishing liquid is screened in the filter mechanism 1, and the grinding debris and large particles that exceed the set size range are screened out. The polishing liquid components that meet the set size range pass through the filter mechanism 1 and enter the magnetic screen mechanism 2;

[0099] S3: The polishing liquid entering the magnetic screen mechanism 2 is separated from the magnetic components and non-magnetic abrasive by the magnetic field; the non-magnetic abrasive and most of the base liquid enter the liquid storage mechanism 3, and the magnetic components and a small amount of water enter the mixing mechanism 4;

[0100] S4: After the polishing liquid entering the mixing mechanism 4 is tested, the amount of non-magnetic abrasive and base liquid that needs to be replenished is calculated. After replenishing new non-magnetic abrasive and base liquid, the mixing mechanism 4 mixes the new components with the old polishing liquid evenly and outputs them through the liquid outlet 62.

[0101] As an embodiment of the present method, in step S3, when the polishing liquid enters the magnetic screen mechanism 2, it first falls on the spiral baffle 22 of the magnetic screen mechanism 2. Because the spiral baffle 22 is tilted, the non-magnetic abrasive and most of the base liquid and other components slide along the tilt direction of the spiral baffle 22 to the bottom center area of ​​the magnetic screen cylinder 21, and finally enter the liquid storage mechanism 3 through the second outlet 29 close to the center area. The old polishing liquid with magnetic components is tightly attached to the spiral baffle 22 close to the side of the magnetic screen cylinder 21 under the magnetic attraction of the magnet group, and falls along the spiral baffle 22 as the magnetic screen cylinder 21 continues to rotate, and finally flows out at the end of the track of the spiral baffle 22 and enters the mixing mechanism 4 connected to the first outlet 28.

[0102] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A magnetorheological polishing liquid separation and purification device, characterized in that: The invention comprises a filtering mechanism (1) for screening large particles of the polishing liquid, a magnetic screening mechanism (2) for magnetically separating magnetic components in the polishing liquid, a liquid storage mechanism (3) for storing the separated polishing liquid, a mixing mechanism (4) for remixing the separated polishing liquid with an abrasive, and a barrel (6). The filtering mechanism (1), the magnetic screening mechanism (2), the liquid storage mechanism (3), and the mixing mechanism (4) are all arranged in the barrel (6) and are connected in sequence. The barrel (6) is also provided with a liquid inlet (61) and a liquid outlet (62). The liquid inlet (61) is connected to the filtering mechanism (1), and the liquid outlet (62) is connected to the mixing mechanism (4). The magnetic sieve mechanism (2) comprises a magnetic sieve drum (21), a magnet group (23) for adsorbing magnetic components, a first channel (26) for guiding the magnetic components separated by magnetic attraction, and a second channel (27) for guiding the non-magnetic components, wherein the first channel (26) is arranged on the inner wall of the magnetic sieve drum (21), the second channel (27) is arranged in the middle of the magnetic sieve drum (21), the tops of the first channel (26) and the second channel (27) merge, the magnet group (23) is arranged beside the outer wall of the magnetic sieve drum (21), the bottom of the first channel (26) is connected to the mixing mechanism (4), and the bottom of the second channel (27) is connected to the liquid storage mechanism (3); The magnetic screen mechanism (2) further includes a rotating mechanism (25), the magnetic screen drum (21) is rotatably connected to the frame via the rotating mechanism (25), a continuous spiral baffle (22) is further provided on the inner wall of the magnetic screen drum (21), the spiral baffle (22) spirals downward along the inner wall of the magnetic screen drum (21), and the spiral baffle (22) is arranged at an angle, and an end of the spiral baffle (22) close to the wall of the magnetic screen drum (21) is higher than an end away from the wall of the magnetic screen drum (21) in a cross section, and the first channel (26) is formed along the spiral line direction of the spiral baffle (22), and the second channel (27) is formed in the middle hollow channel of the spiral baffle (22).

2. The magnetorheological polishing liquid separation and purification device according to claim 1, characterized in that: The filtering mechanism (1) comprises a filter screen (11), a vibrator (12) and a guide plate (14) for guiding the filtered polishing liquid, wherein the vibrator (12) is mounted on the barrel (6), the filter screen (11) is movably connected to the barrel (6) via the vibrator (12), and the guide plate (14) is mounted below the filter screen (11) and fixedly connected to the barrel (6).

3. The magnetorheological polishing liquid separation and purification device according to claim 1, characterized in that: The liquid storage mechanism (3) comprises a first liquid storage tank (31) and a second discharge pipe (32), wherein the first liquid storage tank (31) is connected to the second channel (27), and the second discharge pipe (32) is provided on the barrel (6) and is connected to the first liquid storage tank (31).

4. The magnetorheological polishing liquid separation and purification device according to claim 1, characterized in that: The mixing mechanism (4) includes a second liquid storage tank (41) for storing polishing liquid after the magnetic screen, a feed portion (42) for adding polishing liquid components, a first agitator (43) for mixing new components with old polishing liquid, and a probe (44) for detecting the viscosity of the old polishing liquid. The second liquid storage tank (41) is connected to the first channel (26). The feed portion (42) is provided on the barrel (6) and is connected to the second liquid storage tank (41). The first agitator (43) and the probe (44) are both provided in the second liquid storage tank (41). The liquid outlet (62) is connected to the second liquid storage tank (41).

5. The magnetorheological polishing liquid separation and purification device according to claim 4, characterized in that: The mixing mechanism (4) further includes an automatic feeding mechanism (45), which is arranged between the feeding portion (42) and the second liquid storage bin (41). The automatic feeding mechanism (45) is provided with a plurality of storage bins (451). The feeding portion (42) is provided with a plurality of channels corresponding to the number of storage bins (451). The channels correspond one-to-one with the storage bins (451). The bottom of the storage bin (451) is also provided with an independently controlled discharge port (455). The automatic feeding mechanism (45) is further provided with a stirring bin (452), and a second stirrer (453) is provided in the stirring bin (452) and is communicated with the discharge port (455).

6. The magnetorheological polishing liquid separation and purification device according to any one of claims 1 to 5, characterized in that: The device further comprises an air pressure control mechanism (5) for controlling the air pressure in the device, wherein the air pressure control mechanism (5) is arranged above the filter mechanism (1), and comprises a motor (51), a fan blade (53) and an air filter (54). The motor (51) is fixedly connected to the barrel (6), and the fan blade (53) is connected to the output shaft of the motor (51). The barrel (6) is further provided with an air vent (52). The air filter (54) is detachably connected to the barrel (6) and is located between the fan blade (53) and the filter mechanism (1).

7. A method for separating and purifying a magnetorheological polishing liquid using the magnetorheological polishing liquid separation and purification device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Turn on the power supply, and the external polishing liquid enters the filter mechanism (1) inside the device from the liquid inlet (61); S2: The polishing liquid is screened in the filter mechanism (1), and the grinding debris and large particles exceeding the set size range are screened out, and the polishing liquid components that meet the set size range pass through the filter mechanism (1) and enter the magnetic screen mechanism (2); S3: The polishing liquid entering the magnetic screen mechanism (2) is separated from the magnetic component and the non-magnetic abrasive by the magnetic field; the non-magnetic abrasive and most of the base liquid enter the liquid storage mechanism (3), and the magnetic component and a small amount of water enter the mixing mechanism (4). S4: After the polishing liquid entering the mixing mechanism (4) is tested, the amount of non-magnetic abrasive and base liquid that needs to be replenished is calculated. After the new non-magnetic abrasive and base liquid are replenished, the mixing mechanism (4) mixes the new components with the old polishing liquid evenly and outputs them through the liquid outlet (62).

8. The method for separating and purifying magnetorheological polishing fluid according to claim 7, characterized in that: In step S3, when the polishing liquid enters the magnetic screen mechanism (2), it first falls on the spiral baffle (22) of the magnetic screen mechanism (2). Because the spiral baffle (22) is tilted, the non-magnetic abrasive and most of the base liquid slide along the tilt direction of the spiral baffle (22) to the bottom center area of ​​the magnetic screen cylinder (21), and finally enter the liquid storage mechanism (3) through the second outlet (29) close to the center area. The old polishing liquid with magnetic components adheres to the spiral baffle (22) close to the side of the magnetic screen cylinder (21) under the magnetic attraction of the magnet group, and falls along the spiral baffle (22) as the magnetic screen cylinder (21) rotates continuously, and finally flows out at the end of the track of the spiral baffle (22) and enters the mixing mechanism (4) connected to the first outlet (28).

Images