Micro-arc oxidation electrolyte regulation and control device and regulation and control method

Abstract

The invention belongs to the technical field of micro-arc oxidation, and particularly relates to a micro-arc oxidation electrolyte regulation and control device and method, and the device comprises a reaction tank, a precipitation separation mechanism, a circulation channel, a detection module, a regulation module, a control module and an environment-friendly circulation system. A partition plate is arranged in a barrel of the precipitation separation mechanism to form a precipitation collection space, and the barrel is driven by a driving device to rotate to realize continuous collection and discharge of precipitation; a water outlet at the tail end of the circulating channel is matched with the guide plate to form high-speed directional jet flow; the detection module is used for detecting multiple parameters of the electrolyte in real time; the control module controls the adjusting module to dynamically adjust the electrolyte concentration according to detection data. According to the invention, integrated cooperative control of online detection and automatic adjustment of electrolyte concentration, continuous separation of suspended particles and environment-friendly treatment of waste liquid in the micro-arc oxidation process is realized, the problem that a traditional process needs to be shut down for manual regulation and control is solved, the continuity and high efficiency of the micro-arc oxidation process are ensured, and the method is suitable for industrial continuous production.

Description

Technical Field

[0001] This invention belongs to the field of micro-arc oxidation technology, specifically relating to a micro-arc oxidation electrolyte control device and control method. Background Art

[0002] Micro-arc oxidation is an advanced technology for preparing ceramic oxide films on metal surfaces using high-voltage pulsed discharge. In this process, the concentration of the electrolyte is one of the key factors determining the success or failure of the process. Simultaneously, the reaction generates a large number of micron-sized charged oxide particles, forming a stable colloidal suspension. These suspended particles not only adsorb the effective components in the electrolyte, causing concentration fluctuations, but also easily adhere to the workpiece, leading to defects such as pinholes and porosity in the film layer.

[0003] Traditional production relies on manual sampling, monitoring, and experience-based control, which suffers from significant delays. The treatment of suspended particles requires periodic shutdowns for removal through sedimentation, centrifugation, or manual methods, greatly impacting production efficiency and process stability. Other technologies attempt to promote particle aggregation and sedimentation by adding flocculants, but this introduces impurities, interfering with the electrolyte's chemical balance and plasma discharge process, thus jeopardizing coating performance.

[0004] Therefore, the current field of micro-arc oxidation technology urgently needs an automated system that can integrate real-time detection and adjustment of electrolyte parameters and efficient separation of suspended particles to achieve continuous and efficient operation of the micro-arc oxidation process. Summary of the Invention

[0005] The present invention aims to provide a micro-arc oxidation electrolyte control device and control method to solve the problem of not being able to detect and adjust the electrolyte concentration and separate colloidal precipitates in real time during the micro-arc oxidation reaction process, so as to avoid interfering with the continuity of production.

[0006] To achieve the above objectives, one aspect of the present invention provides a technical solution as follows: a micro-arc oxidation electrolyte control device, comprising a reaction tank, an internal sedimentation separation mechanism, a cylindrical body, and a plurality of partitions circumferentially arranged on the inner wall of the cylindrical body, the partitions extending axially along the cylindrical body, with independent sedimentation collection spaces formed between adjacent partitions; a plurality of through holes are opened on the partitions, and slag discharge holes are spaced apart at the bottom of the sedimentation collection spaces, the slag discharge holes being connected to the waste liquid outlet of the reaction tank; a baffle plate cooperating with the sedimentation collection space is also provided inside the cylindrical body, the baffle plate being spaced apart on the side of the sedimentation collection space near the inner side of the cylindrical body, and the baffle plate being fixed to the bottom of the reaction tank; the bottom of the cylindrical body is rotatably connected to the bottom of the reaction tank, and a strip groove is opened on the bottom of the reaction tank outside the cylindrical body along the rotation direction; a control rod is fixed on the outer wall of the cylindrical body, the control rod extending through the strip groove to the outside of the bottom of the reaction tank; a cavity-type sealing structure is installed at the bottom of the reaction tank, the side of the cavity-type sealing structure facing the side of the cylindrical body abutting against and slidingly sealing the outer wall of the cylindrical body; the control rod is connected to a drive device for driving the cylindrical body to rotate; The reaction tank is connected to a circulation channel. The inlet of the circulation channel is connected to the electrolyte outlet of the reaction tank, and the outlet is connected to the inlet of the reaction tank. A circulation pump is installed on the circulation channel. The outlet of the circulation channel extends into the inside of the cylinder. Several outlet holes are arranged circumferentially on the side wall of the outlet. Several guide plates are fixed at the bottom of the reaction tank. An independent guide channel is formed between adjacent guide plates. The outlet end of each outlet hole faces the inlet of a guide channel, and the outlet end of each guide channel faces the opening of the sedimentation and collection space. The circulation channel is equipped with a detection module, and the inlet of the reaction tank is connected to an adjustment module. The detection module and the adjustment module are respectively connected to the control module. The waste liquid outlet of the reaction tank is connected to an environmental protection circulation system.

[0007] The working principle and beneficial effects of this scheme are as follows: The circulating pump drives the electrolyte to flow in the circulating channel, providing initial kinetic energy to the water flow. When the main stream of electrolyte enters the cylinder from the outlet of the circulating channel, it is forcibly diverted through several outlet holes distributed circumferentially on the side wall, significantly increasing the local velocity and kinetic energy of the electrolyte jet. The guide plate fixed at the bottom of the reaction tank guides the electrolyte flow, increasing the local flow rate. The guide channel constrains and guides the high-speed liquid flow, maintaining and concentrating its kinetic energy, and finally sprays it from the outlet end of the guide channel toward the opening of the corresponding sedimentation collection space. The colloidal particles suspended in the reaction tank are flushed into the sedimentation collection space. Then the cylinder rotates, and the sedimentation collection space that collects the suspended particles rotates to a position that matches the fixed baffle. At the same time, the bottom slag discharge hole of this space is connected to the waste liquid outlet. The baffle and the sedimentation collection space that matches this gap form a semi-closed settling zone. The colloidal particles gradually settle toward the bottom slag discharge hole due to gravity and centrifugal force, realizing continuous automatic slag discharge under non-stop conditions.

[0008] Meanwhile, the detection module in the circulation channel monitors the electrolyte concentration in real time, and the control module feeds the signal back to the adjustment module to dynamically adjust the electrolyte concentration. The environmentally friendly circulation system treats the waste liquid in an environmentally friendly manner. Throughout the entire process, the micro-arc oxidation reaction in the reaction tank proceeds normally, and the detection and adjustment, precipitation separation and reaction processes are completed simultaneously.

[0009] By utilizing the Venturi effect, which increases the flow velocity of fluid as it passes through a narrow outlet, the total pumped flow rate is converted into multiple high-speed jets, achieving effective convergence and amplification of kinetic energy. The narrow inlet of the guide plate also has the function of amplifying the flow rate, which can specifically flush out the colloidal sediment in the reaction tank and prevent the sediment from adhering and accumulating on the surface of the workpiece. While the baffle plate enhances the force of the water flow, the smaller flow rate at the outlet is multiplied to drive the agitation of a larger water body, causing the electrolyte in the reaction tank to form a rotating flow field, which plays a dynamic stirring role, making the electrolyte composition more evenly distributed, avoiding oxide film defects caused by local concentration imbalance, and eliminating the need for additional stirring devices that occupy space in the reaction tank. In the rotating flow field formed by the rotation of the cylinder, the electrolyte generates a radial force gradient due to the centrifugal effect. Colloidal particles and impurities migrate and accumulate radially towards the center of the flow field due to the combined effect of their own inertia and fluid shear force, forming a central convergence effect. This phenomenon can concentrate the dispersed colloids and impurities in the entire reaction tank within the cylinder, making it easier for them to enter the separation area directionally through the through holes of the sedimentation collection space. To enable the regeneration of sedimentation collection spaces, allowing each sedimentation collection space to be repeatedly used in the regeneration process of collection and emptying; It enables continuous operation of the entire micro-arc oxidation process without shutting down the machine, reduces manual intervention, lowers the difficulty of operation and the risk of human error, and is suitable for long-term stable industrial continuous production.

[0010] Optionally, the drive device includes a rack, a gear, and a drive motor. The drive motor is installed at the bottom of the reaction tank, and the output end of the drive motor is connected to the gear. The end of the control rod extending outside the reaction tank is fixedly connected to the rack, and the gear and rack mesh.

[0011] Optionally, the drive device includes a Y-shaped lever and a drive motor. The drive motor is installed at the bottom of the reaction tank. The Y-shaped lever has an integrally formed main section and a branch section. The main section is connected to the output end of the drive motor, and the branch section abuts against the end of the control lever that extends to the outside of the reaction tank.

[0012] Optionally, the bottom of the reaction tank is equipped with a funnel structure, and all the slag discharge holes are connected to the funnel structure. After the colloidal precipitate in the sedimentation collection space is discharged through the slag discharge holes, it is collected through the conical channel of the funnel and then flows into the waste liquid outlet of the reaction tank. The funnel can expand the receiving area of ​​the slag discharge holes and prevent colloids from accumulating at the outlet of the slag discharge holes.

[0013] Optionally, the guide vane is radially inclined along the center of the outlet and deviates from the central axis of the outlet, with an inclination angle of 15° to 60°. The inclination angle of the guide vane converts part of the radial kinetic energy of the fluid into circumferential rotational kinetic energy, thereby forming a rotating vortex field inside the cylinder.

[0014] Optionally, the detection module is located in the circulation channel and includes a first detection flow channel, a heat exchange cooling device, and a second detection flow channel. The first detection flow channel is equipped with a conductivity sensor and a temperature sensor. The heat exchange cooling device connects the first detection flow channel and the second detection flow channel. The second detection flow channel is equipped with a pH sensor, a potential sensor, and a resistivity sensor.

[0015] Optionally, the regulating module includes a mother liquor storage tank, a dilution water tank, and a Y-type mixer. The outlets of the mother liquor storage tank and the dilution water tank are sequentially connected to a check valve, a solenoid valve, a peristaltic pump, and a back pressure valve. The outlet of the back pressure valve is connected to the two inlets of the Y-type mixer, and the outlet of the Y-type mixer is connected to the inlet of the reaction tank.

[0016] Optionally, the control module is electrically connected to the conductivity sensor, temperature sensor, pH sensor, potential sensor, resistivity sensor, solenoid valve of the regulating module, solenoid valve of the waste liquid outlet of the reaction tank, and drive motor.

[0017] Optionally, the environmental recycling system includes a waste liquid collection tank, a drain pump, a coarse filter unit, a fine filter unit, an active ion exchange column, an electrochemical regeneration device, and a regenerated liquid storage tank connected in sequence.

[0018] Another aspect of the present invention is to provide a control method for the above-mentioned micro-arc oxidation electrolyte control device, specifically including the following steps: S1: A portion of the electrolyte is drawn from the reaction tank into the circulation channel and flows through the detection module; S11: The electrolyte first flows through the first detection flow tank. The conductivity sensor and temperature sensor detect the conductivity and temperature parameters of the electrolyte in real time and upload the data to the control module. S12: The electrolyte then enters the heat exchange cooling device for cooling, and then flows into the second detection flow tank. The pH sensor, potential sensor and resistivity sensor detect various parameters of the cooled electrolyte and upload the data to the control module. S2: The control module receives and processes the data uploaded by each sensor. Conductivity and pH data are used as the main control variables. Combined with the resistivity result, the preset range of values ​​for conductivity, pH and resistivity corresponding to the electrolyte concentration is used. When the detected data is less than the value range, it is determined that the concentration is too low and the liquid replenishment operation is triggered. When the detected data is greater than the value range, it is determined that the concentration is too high and the dilution operation is triggered. In other cases, the concentration is determined to be normal and no adjustment operation is triggered. S3: Based on the judgment result of step S2, the control module sends an instruction to the adjustment module. The adjustment module controls the opening degree of the solenoid valve on the outlet pipeline of the mother liquor storage tank or dilution water tank, starts the corresponding peristaltic pump, and delivers the mother liquor or dilution water to the Y-type mixer for mixing after the back pressure valve is stabilized. Finally, the mixed solution is added to the inlet of the reaction tank to achieve the adjustment of the electrolyte concentration. S4: The control module controls the periodic rotation of the cylinder of the sedimentation separation mechanism, so that the colloidal impurities in the reaction tank are discharged from the waste liquid outlet of the reaction tank. S5: The waste liquid discharged from the waste liquid outlet in step S4 enters the environmental protection recycling system, and successively passes through the waste liquid collection tank, the discharge pump pressurization, the coarse filtration unit and the fine filtration unit for multi-stage filtration, the active ion exchange column for adsorption of impurity ions, the electrochemical regeneration device for electrochemical purification and activation, and is finally recycled and stored in the regenerated liquid storage tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the precipitation separation mechanism in an embodiment of the present invention; Figure 2 This is a schematic diagram of the cylinder with a retaining ring in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cylinder without a retaining ring in an embodiment of the present invention; Figure 4 This is a top view of the cylinder in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the cylinder in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the connection between the detection module and the adjustment module in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection of the environmental protection recycling system in an embodiment of the present invention; Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: detection module 1, first detection flow channel 11, conductivity sensor 11-1, temperature sensor 11-2, heat exchange cooling device 12, cooling chamber 12-1, spiral coil 12-2, inlet pipe 12-3, outlet pipe 12-4, second detection flow channel 13, pH sensor 13-1, potential sensor 13-2, resistivity sensor 13-3, regulating module 2, mother liquor storage tank 21, first check valve 21-1, first solenoid valve 21-2, first peristaltic pump 21-3, first back pressure valve 21-4, dilution water tank 22, second check valve 22-1, second solenoid valve 22-2, second peristaltic pump 22-3, second back pressure valve 21-4, second back pressure valve 22, second check valve 22-1, second solenoid valve 22-2, second peristaltic pump 22-3, second back pressure valve 21-4, second back pressure valve 22, second back pressure valve 22-1, second solenoid valve 22-2, second back pressure valve 22-3, second back pressure valve 22-4, second back pressure valve 22, second back pressure valve 22-1, second back pressure valve 22-2, second back pressure valve 22-3, second back pressure valve 22-4, second back pressure valve 2 ... Pressure valve 22-4, Y-type mixer 23, control module 3, reaction tank 4, circulation channel 41, circulation pump 42, funnel structure 43, waste liquid outlet 44, bottom of reaction tank 45, environmental protection circulation system 5, waste liquid collection tank 51, drain pump 52, coarse filter unit 53, fine filter unit 54, active ion exchange column 55, electrochemical regeneration device 56, regenerated liquid storage tank 57, precipitation separation mechanism 6, cylinder 61, boss 611, limiting groove 612, partition 62, precipitation collection space 63, slag discharge hole 64, baffle 65, retaining ring 66, control rod 67, cavity sealing structure 68, Y-type lever 7, drive motor 71, water outlet 8, guide plate 81, guide channel 82.

[0021] Example This embodiment is basically as follows: Figure 1 , Figure 6 , Figure 7 As shown: A micro-arc oxidation electrolyte control device, by integrating a precipitation separation mechanism 6, a circulation channel 41, a detection module 1, an adjustment module 2 and a control module 3, realizes integrated coordinated control of real-time detection of electrolyte concentration, automatic adjustment of electrolyte concentration and continuous separation of suspended particles during micro-arc oxidation.

[0022] like Figure 2 , Figure 3 As shown, the reaction tank 4 is equipped with a sedimentation separation mechanism 6, which includes a cylinder 61. Sixteen partitions 62 are evenly distributed and fixed on the inner wall of the cylinder 61. The partitions 62 extend along the axial direction of the cylinder 61, and independent sedimentation collection spaces 63 are formed between adjacent partitions 62. A row of through holes is opened on the partition 62 along its own axial direction, and the through holes connect to the adjacent sedimentation collection spaces 63. The bottom gap of the sedimentation collection space 63 is provided with a slag discharge hole 64. The bottom 45 of the reaction tank is provided with a funnel structure 43. All the slag discharge holes 64 are connected to the funnel structure 43. After the colloidal sediment in the sedimentation collection space 63 is discharged through the slag discharge hole 64, it is collected through the conical channel of the funnel. The outlet of the funnel is connected to the waste liquid outlet 44 of the reaction tank 4. A solenoid valve is provided at the waste liquid outlet 44 of the reaction tank 4. The solenoid valve flexibly adjusts the sediment discharge and controls the discharge volume in real time according to the amount of colloidal accumulation to avoid excessive loss of electrolyte.

[0023] like Figure 4 As shown, the cylinder 61 is also provided with eight baffles 65 that cooperate with the sedimentation collection space 63. The baffles 65 are spaced apart on the side of the sedimentation collection space 63 near the inside of the cylinder 61. The baffles 65 are fixed to the bottom 45 of the reaction tank. A retaining ring 66 is fixedly connected to the upper end of the cylinder 61. The size of the retaining ring 66 matches the width of the sedimentation collection space 63.

[0024] The bottom of the cylinder 61 is rotatably connected to the bottom 45 of the reaction tank. A strip-shaped groove is formed on the outer side of the cylinder 61 at the bottom 45 of the reaction tank along the direction of rotation. A control rod 67 is fixed to the outer wall of the cylinder 61, extending through the strip-shaped groove to the outside of the bottom 45 of the reaction tank. Figure 5As shown, a cavity-type sealing structure 68 is installed at the bottom of the reaction tank 4. The side of the cavity-type sealing structure 68 facing the side of the cylinder 61 abuts against the outer wall of the cylinder 61 and slides to seal. A sealing strip is provided at the connection between the side of the cylinder 61 and the cavity-type sealing structure 68. A boss 611 is provided at the bottom of the outer wall of the cylinder 61. A limiting groove 612 that mates with the boss 611 is fixedly connected to the bottom 45 of the reaction tank. The control rod 67 is connected to a drive device for driving the cylinder 61 to rotate, including a Y-shaped lever 7 and a drive motor 71. The drive motor 71 is installed in the reaction tank. The bottom of the tank 45 has a Y-shaped lever 7 with an integrally formed main section and a branch section. The main section is connected to the output end of the drive motor 71, and the branch section abuts against the end of the control lever 67 extending outside the reaction tank, so that the control lever can be driven to move by the swing of the Y-shaped lever 7. In another embodiment, the drive device includes a rack, a gear and a drive motor 71. The drive motor 71 is installed at the bottom of the reaction tank 45, and the output end of the drive motor 71 is connected to the gear. The end of the control lever 67 extending outside the reaction tank 4 is fixedly connected to the rack, and the gear and rack mesh.

[0025] The reaction tank 4 is connected to a circulation channel 41. The inlet of the circulation channel 41 is connected to the electrolyte outlet of the reaction tank 4, and the outlet is connected to the inlet of the reaction tank 4. A circulation pump 42 is installed on the circulation channel 41. The outlet of the circulation channel 41 extends into the interior of the cylinder 61. Several outlet holes 8 are circumferentially spaced on the side wall of the outlet. Several guide plates 81 are fixed at the bottom 45 of the reaction tank. An independent guide channel 82 is formed between adjacent guide plates 81. The outlet end of each outlet hole 8 faces the inlet of a guide channel 82, and the outlet end of each guide channel 82 faces the opening direction of the sedimentation collection space 63.

[0026] The specific implementation process of the sedimentation separation mechanism 6 is as follows: After the circulation pump 42 is started, it drives the electrolyte in the reaction tank 4 to enter the circulation channel 41 through the electrolyte outlet. When the main stream of electrolyte reaches the outlet extending into the inside of the cylinder 61, it is diverted by several outlet holes 8 distributed circumferentially on its side wall. According to the Venturi effect in fluid mechanics, when the fluid passes through these narrow outlet holes 8, its local flow rate increases significantly, and its kinetic energy is enhanced. The guide plate 81 converts the high-speed water flow into a rotating vortex. This rotating water flow plays a stirring role for the electrolyte in the reaction tank 4, preventing particle deposition and forcing the suspended colloidal particles to move with the water flow. When the cylinder 61 is in its initial position, the sedimentation collection space 63 formed by the partition 62 inside is open at intervals. During the rotational movement with the water flow, the colloidal particles are washed away by gravity and centrifugal force and accumulate on the cylinder wall or bottom of the open sedimentation collection space 63. After a predetermined time or according to a preset program, the control module 3 starts the drive motor 71. In this embodiment, the drive motor 71 is a servo motor. The servo motor drives the control rod 67 through a gear and rack transmission pair, thereby driving the entire cylinder 61 to rotate a certain angle, accurately rotating a fully loaded sedimentation collection space 63 to the position where the baffle 65 is located, and at the same time rotating an empty sedimentation collection space 63 to the open position.

[0027] The boss 611 on the bottom of the outer wall of the cylinder 61 cooperates with the limiting groove 612 fixed to the bottom 45 of the reaction tank, which serves to limit rotation and provide auxiliary support, ensuring that the bottom of the cylinder 61 fits against the bottom 45 of the reaction tank during rotation. The baffle ring 66 rotates with the cylinder 61, and its size matches the width of the sedimentation collection space 63, ensuring the sealing of the top of each collection space. When the sedimentation collection space 63, fully loaded with colloidal particles, rotates to the position where it cooperates with the fixed baffle 65, the baffle 65 forms a gap fit with the space. The baffle 65 and the baffle ring 66 effectively block most of the entrance to the space, creating a closed low-pressure settling zone inside. At this time, the adjacent open collection space is a high-pressure zone. Under the action of a significant pressure difference, the main water flow will pass through the through hole on the baffle 62 and be injected into this low-pressure settling zone. This transverse jet effectively flushes and agitates the colloidal sediment settled on the inner wall of the space, causing it to detach from the wall surface. Because the slag discharge hole 64 at the bottom of the sedimentation collection space 63 is always connected to the waste liquid outlet 44 of the reaction tank 4, the sediment flushed up by gravity and the suction force of the bottom fluid is quickly discharged through the slag discharge hole 64 and enters the subsequent environmental protection recycling system 5. The cavity-type sealing structure 68 and the sealing strip ensure the sealing of the connection between the cylinder 61 and the bottom 45 of the reaction tank during rotation, preventing electrolyte leakage from the rotating interface. The above process is repeated continuously. The drive motor 71 intermittently rotates the cylinder 61 according to a set cycle, so that each sedimentation collection space 63 goes through the steps of collection, rotation, flushing and slag discharge and resetting, thereby realizing fully automatic continuous removal of sediment without stopping the machine.

[0028] A method for controlling a micro-arc oxidation electrolyte control device specifically includes the following steps: S1: Part of the electrolyte flows from the reaction tank 4 into the circulation channel 41 and enters the detection module 1; S11: As Figure 6 As shown, the first detection flow tank 11 is located at the front end of the circulation channel 41. It is equipped with a conductivity sensor 11-1 and a temperature sensor 11-2. The conductivity sensor 11-1 and the temperature sensor 11-2 are electrically connected to the control module 3. The conductivity sensor 11-1 is used to detect the conductivity of the electrolyte in real time, which serves as the main reference for judging the concentration change. The temperature sensor 11-2 synchronously collects the temperature of the electrolyte to achieve temperature compensation for conductivity measurement. The conductivity and temperature signals are uploaded to the control module 3 together to form the basic data for front-end concentration judgment. S12: After the electrolyte flows through the first detection tank, it is cooled by the heat exchange cooling device 12 and then introduced into the second detection flow tank 13. The heat exchange cooling device 12 includes a cooling chamber 12-1 and a spiral coil 12-2 disposed in the cooling chamber 12-1. The inlet of the spiral coil 12-2 is connected to the outlet of the first detection flow tank 11, and the outlet of the spiral coil 12-2 is connected to the inlet of the second detection flow tank 13. The cooling chamber 12-1 is connected to an inlet pipe 12-3 and an outlet pipe 12-4. The heat exchange cooling device 12 introduces low-temperature cooling water through the cooling chamber 12-1, with water entering through the inlet pipe 12-3 and exiting through the outlet pipe 12-4. Water and electrolyte flow out of the first detection flow tank 11 and enter the spiral coil 12-2. The spiral coil 12-2 increases the contact area between the electrolyte and the cooling chamber 12-1, and uses the temperature difference between the cooling water and the electrolyte to exchange heat, thereby cooling the electrolyte. The cooled electrolyte enters the second detection flow tank 13 through the outlet of the spiral coil 12-2, reducing the electrolyte temperature to a stable range and reducing the interference of temperature fluctuations on the pH sensor 13-1, potential sensor 13-2 and resistivity sensor 13-3 in the second detection flow tank 13, ensuring the accuracy of the sensor detection data and providing reliable basic data for subsequent concentration determination. S2: Conductivity sensor 11-1, temperature sensor 11-2, pH sensor 13-1, potential sensor 13-2, resistivity sensor 13-3, and solenoid valve are all electrically connected to control module 3. Control module 3 performs temperature correction, trend filtering, and outlier removal on the data from all sensors to form a complete and dynamic electrolyte state judgment system. Conductivity and pH data are used as the main control variables. Combined with resistivity results, control module 3 comprehensively judges the current electrolyte concentration state based on the range of conductivity, pH, and resistivity values ​​corresponding to the electrolyte concentration. Based on the current concentration state, it determines whether to trigger a replenishment or dilution operation. If the electrolyte concentration state is normal, electrolyte circulation is maintained. If the electrolyte concentration state is too high, control module 3 outputs a control signal to the second solenoid valve 22-2 to trigger a dilution operation. If the electrolyte concentration state is too low, control module 3 outputs a control signal to the first solenoid valve 21-2 to trigger a replenishment operation. S3: Based on the judgment result of step S2, control module 3 sends a command to adjustment module 2. Adjustment module 2 includes a mother liquor storage tank 21, a dilution water tank 22, and a Y-type mixer 23. The bottom outlet of the mother liquor storage tank 21 is connected to a first check valve 21-1 via a corrosion-resistant hose. The first check valve 21-1 prevents the mixed liquid in the pipeline from flowing back into the mother liquor storage tank 21, ensuring unidirectional fluid flow and avoiding contamination. The outlet end of the first check valve 21-1 is connected to a first solenoid valve 21-2. By controlling the opening degree of the first solenoid valve 21-2, the instantaneous flow rate of the mother liquor entering the Y-type mixer 23 is controlled, achieving primary regulation of the mother liquor inlet speed. The outlet end of the first solenoid valve 21-2 is connected to a first peristaltic pump 21-3 via a short pipe. The first peristaltic pump 21-3 pushes the liquid forward by roller extrusion according to the set speed signal. The outlet end of the first peristaltic pump 21-3 is connected to the inlet end on the left side of the Y-type mixer 23 through the first back pressure valve 21-4. The mother liquor storage tank 21 to the Y-type mixer 23 form the mother liquor channel, and the dilution water tank 22 to the Y-type mixer 23 form the dilution water channel. The connection structure of the dilution water channel is the same as that of the mother liquor channel. The dilution water tank 22 is connected in sequence to the second check valve 22-1, the second solenoid valve 22-2 and the second peristaltic pump 22-3. The outlet end of the second peristaltic pump 22-3 is connected to the inlet end on the right side of the Y-type mixer 23 through the second back pressure valve 22-4. The outlet end of the Y-type mixer 23 is connected to the electrolyte circulation channel 41. S4: Control module 3 controls the cylinder 61 of sedimentation separation mechanism 6 to rotate periodically, so that colloidal impurities in reaction tank 4 are discharged from waste liquid outlet 44 of reaction tank 4. S5: The waste liquid discharged from waste liquid outlet 44 after step S4 enters the environmental protection recycling system 5, such as... Figure 7As shown, the waste liquid first flows into the waste liquid collection tank 51, and then enters the coarse filtration unit 53 driven by the drain pump 52. The coarse filtration unit 53 is composed of a polypropylene filter element to remove larger suspended particles. Then it passes through the fine filtration unit 54, which is composed of a high-precision filter membrane to remove fine particles and precipitates. The purified waste liquid enters the active ion exchange column 55, which is filled with a highly selective resin material to adsorb impurity ions in the electrolyte, thereby achieving chemical purification of the electrolyte. Afterward, the electrolyte flows through the electrochemical regeneration device 56, which uses an electric field to remove some residual impurities and repair the active components of the liquid, so that the concentration and conductivity of the treated electrolyte are restored to a controllable range. The purified electrolyte is then collected in the regeneration liquid storage tank 57.

[0029] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A micro-arc oxidation electrolyte control device, characterized in that: A micro-arc oxidation electrolyte control device includes a reaction tank with a precipitation separation mechanism inside. The precipitation separation mechanism includes a cylinder with several baffles arranged circumferentially on the inner wall of the cylinder. The baffles extend axially along the cylinder, forming independent precipitation collection spaces between adjacent baffles. Several through holes are opened on the baffles, and slag discharge holes are spaced apart at the bottom of the precipitation collection spaces, which are connected to the waste liquid outlet of the reaction tank. Baffles that cooperate with the precipitation collection spaces are also provided inside the cylinder, spaced apart on the side of the precipitation collection spaces near the inner side of the cylinder, and fixed to the bottom of the reaction tank. The bottom of the cylinder is rotatably connected to the bottom of the reaction tank. A strip groove is opened on the bottom of the reaction tank outside the cylinder along the rotation direction. A control rod is fixed on the outer wall of the cylinder and extends to the outside of the bottom of the reaction tank through the strip groove. A cavity-type sealing structure is installed at the bottom of the reaction tank, with the side of the cavity-type sealing structure facing the cylinder abutting against and slidingly sealing the outer wall of the cylinder. The control rod is connected to a drive device for driving the cylinder to rotate. The reaction tank is connected to a circulation channel. The inlet of the circulation channel is connected to the electrolyte outlet of the reaction tank, and the outlet is connected to the inlet of the reaction tank. A circulation pump is installed on the circulation channel. The outlet of the circulation channel extends into the inside of the cylinder. Several outlet holes are arranged circumferentially on the side wall of the outlet. Several guide plates are fixed at the bottom of the reaction tank. An independent guide channel is formed between adjacent guide plates. The outlet end of each outlet hole faces the inlet of a guide channel, and the outlet end of each guide channel faces the opening of the sedimentation and collection space. The circulation channel is equipped with a detection module, and the inlet of the reaction tank is connected to an adjustment module. The detection module and the adjustment module are respectively connected to the control module. The waste liquid outlet of the reaction tank is connected to an environmental protection circulation system.

2. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The drive unit includes a rack, a gear, and a drive motor. The drive motor is installed at the bottom of the reaction tank, and the output end of the drive motor is connected to the gear. The end of the control rod extending outside the reaction tank is fixedly connected to the rack, and the gear and rack mesh.

3. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The drive unit includes a Y-shaped lever and a drive motor. The drive motor is installed at the bottom of the reaction tank. The Y-shaped lever has an integrally formed main section and a branch section. The main section is connected to the output end of the drive motor, and the branch section abuts against the end of the control rod that extends to the outside of the reaction tank.

4. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The bottom of the reaction tank is equipped with a funnel structure, and all the slag discharge holes are connected to the funnel structure.

5. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The guide plate is radially inclined along the center of the outlet and deviates from the central axis of the outlet, with an inclination angle of 15° to 60°.

6. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The detection module is located in the circulation channel and includes a first detection flow channel, a heat exchange cooling device, and a second detection flow channel. The first detection flow channel is equipped with a conductivity sensor and a temperature sensor. The heat exchange cooling device connects the first detection flow channel and the second detection flow channel. The second detection flow channel is equipped with a pH sensor, a potential sensor, and a resistivity sensor.

7. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The regulating module includes a mother liquor storage tank, a dilution water tank, and a Y-type mixer. The outlets of the mother liquor storage tank and the dilution water tank are connected in sequence to a check valve, a solenoid valve, a peristaltic pump, and a back pressure valve. The outlet of the back pressure valve is connected to the two inlets of the Y-type mixer, and the outlet of the Y-type mixer is connected to the inlet of the reaction tank.

8. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The control module is electrically connected to the conductivity sensor, temperature sensor, pH sensor, potential sensor, resistivity sensor, solenoid valve of the regulating module, solenoid valve of the waste liquid outlet of the reaction tank, and drive motor.

9. The micro-arc oxidation electrolyte control device according to claim 1, characterized in that: The environmental recycling system includes a waste liquid collection tank, a drain pump, a coarse filtration unit, a fine filtration unit, an active ion exchange column, an electrochemical regeneration device, and a regenerated liquid storage tank, which are connected in sequence.

10. A method for controlling a micro-arc oxidation electrolyte control device, characterized in that: Specifically, the following steps are included: S1: A portion of the electrolyte is drawn from the reaction tank into the circulation channel and flows through the detection module; S11: The electrolyte first flows through the first detection flow tank. The conductivity sensor and temperature sensor detect the conductivity and temperature parameters of the electrolyte in real time and upload the data to the control module. S12: The electrolyte then enters the heat exchange cooling device for cooling, and then flows into the second detection flow tank. The pH sensor, potential sensor and resistivity sensor detect various parameters of the cooled electrolyte and upload the data to the control module. S2: The control module receives and processes the data uploaded by each sensor. Conductivity and pH data are used as the main control variables. Combined with the resistivity result, the preset range of values ​​for conductivity, pH and resistivity corresponding to the electrolyte concentration is used. When the detected data is less than the value range, it is determined that the concentration is too low and the liquid replenishment operation is triggered. When the detected data is greater than the value range, it is determined that the concentration is too high and the dilution operation is triggered. In other cases, the concentration is determined to be normal and no adjustment operation is triggered. S3: Based on the judgment result of step S2, the control module sends an instruction to the adjustment module. The adjustment module controls the opening degree of the solenoid valve on the outlet pipeline of the mother liquor storage tank or dilution water tank, starts the corresponding peristaltic pump, and delivers the mother liquor or dilution water to the Y-type mixer for mixing after the back pressure valve is stabilized. Finally, the mixed solution is added to the inlet of the reaction tank to achieve the adjustment of the electrolyte concentration. S4: The control module controls the periodic rotation of the cylinder of the sedimentation separation mechanism, so that the colloidal impurities in the reaction tank are discharged from the waste liquid outlet of the reaction tank. S5: The waste liquid discharged from the waste liquid outlet in step S4 enters the environmental protection recycling system, and successively passes through the waste liquid collection tank, the discharge pump pressurization, the coarse filtration unit and the fine filtration unit for multi-stage filtration, the active ion exchange column for adsorption of impurity ions, the electrochemical regeneration device for electrochemical purification and activation, and is finally recycled and stored in the regenerated liquid storage tank.

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