Automatic adjusting device for concentration of pickling solution and control method thereof

Abstract

The application belongs to the technical field of silicon steel strip processing, and discloses a pickling liquor concentration automatic adjusting device and a control method thereof. The pickling liquor in a pickling liquor storage tank is pumped to a sample tank of a concentration detection device by a liquid pump. Whether the impurity content in the pickling liquor exceeds the standard is detected by an impurity detection assembly. If the impurity content exceeds the standard, the pickling liquor in the pickling liquor storage tank is replaced. If the impurity content does not exceed the standard, the acid original liquid in an acid original liquid storage tank is supplemented into the pickling liquor storage tank to adjust the concentration of the pickling liquor, so that the concentration of the pickling liquor is kept within the required range. The concentration of the pickling liquor can be detected and automatically adjusted on line, the concentration adjusting efficiency is improved, and the timeliness of concentration adjustment is ensured.

Description

Technical Field

[0001] This application relates to the field of silicon steel strip processing technology, and more specifically, to an automatic pickling solution concentration adjustment device and its control method. Background Technology

[0002] Pickling is an essential step in the production of silicon steel strip. It removes the oxide layer from the surface of the silicon steel strip and is generally carried out using a silicon steel strip pickling device.

[0003] Existing silicon steel strip pickling equipment mainly includes a pickling solution storage tank, a pickling tank, a conveyor roller assembly, and a spraying device. The pickling solution storage tank stores the pickling solution, the spraying device is located above the pickling tank, the conveyor roller assembly drives the silicon steel strip through the pickling tank, and the spraying device draws pickling solution from the storage tank and sprays it onto the silicon steel strip passing through the tank to pickle the continuously conveyed strip. Pickling solution falling into the tank is returned to the storage tank for recycling. During silicon steel strip pickling, the concentration of the pickling solution (referring to the H+ ion concentration) in the storage tank gradually decreases, while the impurity content increases (e.g., the Fe2+ ion content increases), leading to a gradual decline in the performance of the pickling solution. Currently, the pickling solution is typically sampled and tested manually at regular intervals to detect its concentration and impurity content. Based on the test results, the solution is replaced or its concentration adjusted. However, concentration adjustment is inefficient and untimely, easily affecting the pickling effect of the silicon steel strip.

[0004] Therefore, existing technologies need to be improved and enhanced. Summary of the Invention

[0005] The purpose of this application is to provide an automatic pickling solution concentration adjustment device and its control method, which can realize online detection and automatic adjustment of pickling solution concentration, improve concentration adjustment efficiency, and ensure the timeliness of concentration adjustment.

[0006] In a first aspect, this application provides an automatic pickling solution concentration adjustment device, including a main control module, a pickling solution storage tank, an acid stock solution storage tank, a concentration detection device, an infusion pump, a drain pump, and an inlet pump; the main control module is electrically connected to the concentration detection device, the infusion pump, the drain pump, and the inlet pump; The pickling solution storage tank is used to store pickling solution; the acid stock solution storage tank is used to store acid stock solution, which is an acid solution of the same type as the pickling solution but with a higher concentration; the inlet pump is connected between the pickling solution storage tank and the acid stock solution storage tank, and is used to pump the acid stock solution in the acid stock solution storage tank to the pickling solution storage tank; the outlet pump is connected to the pickling solution storage tank, and is used to discharge the pickling solution from the pickling solution storage tank when the pickling solution in the pickling solution storage tank is replaced. The concentration detection device includes a sample tank, an impurity detection component, and a concentration detection component; the infusion pump is connected between the sample tank and the pickling solution storage tank, and is used to transport the pickling solution in the pickling solution storage tank to the sample tank; the impurity detection component is used to detect whether the impurity content of the pickling solution in the sample tank exceeds the standard; the concentration detection component is used to detect the concentration of the pickling solution in the sample tank. The main control module is used to replace the pickling solution in the pickling solution storage tank by draining the solution through the drain pump or to adjust the concentration of the pickling solution in the pickling solution storage tank by delivering acid stock solution through the inlet pump, based on the detection results of the concentration detection device.

[0007] During operation, the pickling solution is sampled from the pickling solution storage tank into the sample tank of the concentration detection device via an infusion pump. The impurity detection component checks whether the impurity content exceeds the standard. If it does, the pickling solution in the storage tank is replaced. If it does not exceed the standard, the acid stock solution in the acid stock solution storage tank is added to the pickling solution storage tank to adjust the concentration of the pickling solution and keep it within the required range. This enables online detection and automatic adjustment of the pickling solution concentration, improving the efficiency of concentration regulation and ensuring the timeliness of concentration adjustment.

[0008] Preferably, the sample cell wall is transparent, and the impurity detection component includes an illumination lamp and a camera disposed opposite to each other on both sides of the sample cell.

[0009] Preferably, the top of the sample well has an opening, and a circular guide post extending laterally is provided inside the sample well; The concentration detection assembly includes an unwinding shaft for unwinding the metal wire, a winding shaft for winding the metal wire, a servo motor for driving the winding shaft to rotate, a resistance detection circuit, and a guide roller assembly disposed between the unwinding shaft and the winding shaft; the servo motor and the resistance detection circuit are both electrically connected to the main control module. The metal wire is capable of reacting with the pickling solution. The metal wire is wound around the guide roller assembly and the circular guide post, forming a first exposed section upstream of the circular guide post and a second exposed section downstream of the circular guide post outside the sample tank. The resistance detection circuit is used to detect the resistance of the first exposed section and the second exposed section and send it to the main control module so that the main control module can determine the concentration of the pickling solution in the sample tank by comparing the resistance of the first exposed section and the second exposed section.

[0010] By transmitting a metal wire into the sample tank to react with the pickling solution, the diameter of the metal wire will decrease after the reaction, thus increasing the resistance. The change in resistance of the second exposed section relative to the first exposed section reflects the concentration of the pickling solution. By comparing the resistance of the second exposed section and the first exposed section, the concentration of the pickling solution can be quickly calculated.

[0011] Preferably, the resistance detection circuit includes two first brushes, two second brushes, a first resistance detection module, and a second resistance detection module; The two first brushes are in contact with both ends of the first exposed section, and the two second brushes are in contact with both ends of the second exposed section. The first resistance detection module is connected to the two first brushes and is used to detect the resistance of the first exposed section between the two first brushes; the second resistance detection module is connected to the two second brushes and is used to detect the resistance of the second exposed section between the two second brushes.

[0012] Preferably, the guide roller group includes multiple guide rollers, and at least one of the guide rollers is connected to a rotary encoder, which is electrically connected to the main control module.

[0013] When performing concentration detection, the metal wire can be controlled to move at a constant speed, and the resistance of the second exposed section and the first exposed section can be detected during the movement. This avoids the reaction products of the metal wire and the pickling solution adhering to the surface of the metal wire, affecting the reaction rate and thus affecting the concentration detection results.

[0014] Preferably, a second level gauge is provided on the sample tank, the second level gauge is electrically connected to the main control module, and is used to detect the level of the pickling solution in the sample tank; The circular guide post is positioned higher than the impurity detection component.

[0015] Preferably, a temperature sensor is provided on the sample tank, the temperature sensor is electrically connected to the main control module, and is used to detect the temperature of the pickling solution in the sample tank.

[0016] Preferably, the pickling solution storage tank is equipped with a first level gauge, which is electrically connected to the main control module and is used to detect the level of the pickling solution in the pickling solution storage tank.

[0017] Preferably, the automatic pickling solution concentration regulating device further includes a waste liquid tank, and the drain pump is connected between the pickling solution storage tank and the waste liquid tank, and is used to discharge the pickling solution to the waste liquid tank when the pickling solution in the pickling solution storage tank is replaced.

[0018] Secondly, this application provides a control method for the automatic pickling solution concentration adjustment device as described above, applied to the main control module of the automatic pickling solution concentration adjustment device, including the following steps: A1. Control the infusion pump to deliver the pickling solution in the pickling solution storage tank to the sample tank of the concentration detection device, and use the impurity detection component to detect whether the impurity content of the pickling solution in the sample tank exceeds the standard; A2. If the impurity content of the pickling solution in the sample tank exceeds the standard, the pickling solution in the pickling solution storage tank will be replaced by draining the solution using the drain pump. A3. If the impurity content of the pickling solution in the sample tank does not exceed the standard, the concentration of the pickling solution in the sample tank is detected by the concentration detection component, and according to the concentration detection result, the acid stock solution is delivered to the pickling solution storage tank by the inlet pump to adjust the concentration of the pickling solution in the pickling solution storage tank.

[0019] Beneficial effects: The automatic pickling solution concentration adjustment device and control method provided in this application, during operation, uses an infusion pump to sample the pickling solution from the pickling solution storage tank into the sample tank of the concentration detection device. The impurity detection component detects whether the impurity content exceeds the standard. If it does, the pickling solution in the pickling solution storage tank is replaced. If it does not exceed the standard, the acid stock solution in the acid stock solution storage tank is added to the pickling solution storage tank to adjust the concentration of the pickling solution, so that the concentration of the pickling solution is maintained within the required range. This enables online detection and automatic adjustment of the pickling solution concentration, improves the concentration adjustment efficiency, and ensures the timeliness of concentration adjustment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic pickling solution concentration adjustment device provided in the embodiments of this application.

[0021] Figure 2 This is a schematic diagram of the concentration detection device.

[0022] Figure 3 This is an electrical connection diagram of the automatic pickling solution concentration adjustment device provided in the embodiments of this application.

[0023] Figure 4 A flowchart of the control method provided in the embodiments of this application.

[0024] Labeling Explanation: 1. Main Control Module; 2. Pickling Solution Storage Tank; 201. Output Solenoid Valve; 202. Reflux Solenoid Valve; 3. Acid Stock Solution Storage Tank; 4. Concentration Detection Device; 401. Sample Tank; 4011. Input Port; 4012. Output Port; 4013. Circular Guide Post; 4014. Scraper Block; 402. Irradiation Lamp; 403. Camera; 404. Metal Wire; 4041. First Exposed Section; 4042. Second Exposed Section; 405. Unwinding shaft; 406. Rewinding shaft; 407. Servo motor; 408. First brush; 409. Second brush; 410. First resistance detection module; 411. Second resistance detection module; 412. Guide roller; 413. Rotary encoder; 414. Second level gauge; 415. Temperature sensor; 5. Infusion pump; 6. Drain pump; 7. Inlet pump; 8. Reverse flow solenoid valve; 9. First level gauge; 10. Waste liquid tank. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Please refer to Figures 1-3 This is an automatic pickling solution concentration adjustment device in some embodiments of this application, including a main control module 1, a pickling solution storage tank 2, an acid stock solution storage tank 3, a concentration detection device 4, an infusion pump 5, a drain pump 6, and an inlet pump 7; the main control module 1 is electrically connected to the concentration detection device 4, the infusion pump 5, the drain pump 6, and the inlet pump 7. Pickling solution storage tank 2 is used to store pickling solution; acid stock solution storage tank 3 is used to store acid stock solution, which is an acid solution of the same type as the pickling solution but with a higher concentration (for example, if the pickling solution is hydrochloric acid, then the acid stock solution is hydrochloric acid with a higher concentration than the pickling solution, but the pickling solution is not limited to hydrochloric acid); inlet pump 7 is connected between pickling solution storage tank 2 and acid stock solution storage tank 3, and is used to pump the acid stock solution in acid stock solution storage tank 3 to pickling solution storage tank 2; outlet pump 6 is connected to pickling solution storage tank 2, and is used to discharge the pickling solution from pickling solution storage tank 2 when the pickling solution in pickling solution storage tank 2 is replaced. The concentration detection device 4 includes a sample tank 401, an impurity detection component, and a concentration detection component; the infusion pump 5 is connected between the sample tank 401 and the pickling solution storage tank 2, and is used to transport the pickling solution in the pickling solution storage tank 2 to the sample tank 401; the impurity detection component is used to detect whether the impurity content of the pickling solution in the sample tank 401 exceeds the standard; the concentration detection component is used to detect the concentration of the pickling solution in the sample tank 401. The main control module 1 is used to replace the pickling solution in the pickling solution storage tank 2 by draining the solution through the drain pump 6 or by delivering acid stock solution through the inlet pump 7 according to the detection results of the concentration detection device 4 (for details, please refer to the control method below).

[0028] During operation, the pickling solution in the pickling solution storage tank 2 is sampled by the infusion pump 5 and transferred to the sample tank 401 of the concentration detection device 4. The impurity detection component is used to detect whether the impurity content exceeds the standard. If it does, the pickling solution in the pickling solution storage tank 2 is replaced (when the impurity content exceeds the standard, it will seriously affect the pickling effect, and even if the concentration is increased, the pickling effect cannot be guaranteed. Therefore, it is necessary to replace it completely). If it does not exceed the standard, the acid stock solution in the acid stock solution storage tank 3 is added to the pickling solution storage tank 2 to adjust the concentration of the pickling solution and keep the concentration of the pickling solution within the required range. This enables online detection and automatic adjustment of the concentration of the pickling solution, improves the efficiency of concentration adjustment, and ensures the timeliness of concentration adjustment.

[0029] The sample tank 401 is equipped with an inlet 4011, which is connected to the infusion pump 5.

[0030] Furthermore, the bottom of the sample tank 401 is cone-shaped and has an outlet 4012 at the bottom end. The outlet 4012 is connected to the pickling solution storage tank 2 and is used to transport the pickling solution in the sample tank 401 back to the pickling solution storage tank 2.

[0031] In some possible implementations, a liquid pump is connected between the output port 4012 of the sample tank 401 and the pickling solution storage tank 2, the liquid pump being used to transport the pickling solution in the sample tank 401 back to the pickling solution storage tank 2.

[0032] In some other possible implementations, see Figure 2 The lower end of the sample tank 401 is higher than the maximum liquid level in the pickling solution storage tank 2. A backflow solenoid valve 8 is connected between the output port 4012 and the pickling solution storage tank 2, and this backflow solenoid valve 8 is electrically connected to the main control module 1. When the concentration detection device 4 completes the detection, it controls the backflow solenoid valve 8 to open, and the pickling solution in the sample tank 401 automatically returns to the pickling solution storage tank 2 under gravity, without the need for a liquid pump.

[0033] In some implementations, see Figure 2 The sample tank 401 has transparent walls. The impurity detection component includes an illumination lamp 402 and a camera 403, which are positioned opposite each other on both sides of the sample tank 401. During operation, after the main illumination lamp 402 is activated, the camera 403 takes a picture of the pickling solution in the sample tank 401 and sends it to the main control module 1. The main control module 1 analyzes the image using image analysis methods to determine whether the impurity content of the pickling solution exceeds the standard (for example, calculating the average brightness of the pixels in the picture; if the average brightness is lower than a preset brightness threshold, the impurity content is determined to exceed the standard; otherwise, the impurity content is determined not to exceed the standard).

[0034] In fact, the impurity detection component may also include a turbidity sensor installed in the sample tank 401. The turbidity sensor is used to detect the turbidity of the pickling solution in the sample tank 401 and send it to the main control module 1. The main control module 1 determines whether the impurity content of the pickling solution exceeds the standard based on the turbidity of the pickling solution (for example, if the turbidity exceeds the preset turbidity threshold, it is determined that the impurity content exceeds the standard; otherwise, it is determined that the impurity content does not exceed the standard).

[0035] However, the structure of the impurity detection component is not limited to the two structures mentioned above.

[0036] Specifically, see Figure 2 The sample cell 401 has an opening at the top, and a circular guide post 4013 extending laterally is provided inside the sample cell 401. The concentration detection assembly includes an unwinding shaft 405 for unwinding the metal wire 404, a winding shaft 406 for winding the metal wire 404, a servo motor 407 for driving the winding shaft 406 to rotate, a resistance detection circuit, and a guide roller assembly disposed between the unwinding shaft 405 and the winding shaft 406; the servo motor 407 and the resistance detection circuit are both electrically connected to the main control module 1. Metal wire 404 can react with pickling solution (for example, metal wire 404 is iron wire, aluminum wire, zinc wire, etc., but not limited to these). Metal wire 404 is wound on guide roller group and circular guide post 4013 and forms a first exposed section 4041 upstream of circular guide post 4013 and a second exposed section 4042 downstream of circular guide post 4013 outside sample tank 401. Resistance detection circuit detects the resistance of the first exposed section 4041 and the second exposed section 4042 and sends it to main control module 1 so that main control module 1 can determine the concentration of pickling solution in sample tank 401 by comparing the resistance of the first exposed section 4041 and the second exposed section 4042.

[0037] By transmitting the metal wire 404 into the sample tank 401 to react with the pickling solution, the diameter of the metal wire 404 decreases after the reaction, thus increasing its resistance. The change in resistance of the second exposed section 4042 relative to the first exposed section 4041 reflects the concentration of the pickling solution. By comparing the resistances of the second exposed section 4042 and the first exposed section 4041, the concentration of the pickling solution can be quickly calculated. Preferably, the lengths of the first exposed section 4041 and the second exposed section 4042 are equal, but this is not a limitation.

[0038] Wherein, the first exposed segment 4041 and the second exposed segment 4042 can be straight segments (e.g. Figure 2 As shown in the figure, it can also be a curve segment.

[0039] Furthermore, see Figure 2 The resistance detection circuit includes two first brushes 408, two second brushes 409, a first resistance detection module 410, and a second resistance detection module 411. Two first brushes 408 are in contact with both ends of the first exposed section 4041, and two second brushes 409 are in contact with both ends of the second exposed section 4042. The first resistance detection module 410 is connected to two first brushes 408 and is used to detect the resistance of the first exposed section 4041 between the two first brushes 408; the second resistance detection module 411 is connected to two second brushes 409 and is used to detect the resistance of the second exposed section 4042 between the two second brushes 409.

[0040] The first resistance detection module 410 and the second resistance detection module 411 can be selected from existing resistance detection chips or use existing volt-ampere detection circuits, but are not limited thereto. Specifically, both the first resistance detection module 410 and the second resistance detection module 411 are electrically connected to the main control module 1, such as... Figure 3 As shown.

[0041] Specifically, the guide roller assembly includes multiple guide rollers 412; the specific number and arrangement of the guide rollers 412 can be set according to actual needs; for example... Figure 2In this design, four guide rollers 412 are provided, each divided into two groups. The two groups of guide rollers 412 are symmetrically arranged (the plane of symmetry is the vertical plane containing the central axis of the circular guide post 4013). One guide roller 412 in each group is higher than the upper opening of the sample groove 401. The four guide rollers 412 and the circular guide post 4013 are arranged in an "M" shape. This distribution of guide rollers 412 helps to ensure the tension of the metal wire 404, thereby reliably forming the first exposed section 4041 and the second exposed section 4042 upstream and downstream of the circular guide post 4013.

[0042] Preferably, see Figure 2 At least one guide roller 412 is connected to a rotary encoder 413, which is electrically connected to the main control module 1. During concentration detection, the metal wire 404 can be controlled to move at a constant speed (which can be set according to actual needs), and the resistance of the second exposed section 4042 and the first exposed section 4041 can be detected during the movement. This prevents the reaction products of the metal wire 404 and the pickling solution from adhering to the surface of the metal wire 404, affecting the reaction rate and thus the concentration detection result.

[0043] In practice, if the metal wire 404 is kept stationary and reacted for a preset time during concentration detection, and then the reacted portion of the metal wire 404 is moved to the position of the second exposed section 4042 before resistance detection, the reaction products between the metal wire 404 and the pickling solution will gradually adhere to the surface of the metal wire 404. Using this static detection method, the reaction rate will gradually decrease over time, leading to a complex relationship between the change in resistance of the metal wire 404 and the concentration of the pickling solution. This makes it difficult to accurately estimate the concentration of the pickling solution based on the change in resistance of the metal wire 404. Here, by controlling the metal wire 404 to move at a constant speed, the reaction time at all points on the metal wire 404 is kept constant. Simultaneously, the adhesion of reaction products to the surface of the metal wire 404 is avoided. This ensures a constant reaction rate between the metal wire 404 and the pickling solution within a constant reaction time, simplifying the relationship between the change in resistance of the metal wire 404 and the concentration of the pickling solution, and improving the accuracy of pickling solution concentration detection. The rotary encoder 413 can detect the moving speed of the metal wire 404 in real time (the rotary encoder 413 directly measures the rotation speed of the guide roller 412, and the moving speed of the metal wire 404 can be calculated based on the rotation speed and the radius of the guide roller 412). As feedback data for the main control module 1 to control the rotation speed of the servo motor 407, it helps to ensure that the moving speed of the metal wire 404 is stable at the required speed.

[0044] Furthermore, see Figure 2A scraper block 4014 can be installed at the upper end of the sample tank 401, downstream of the circular guide post 4013. A metal wire 404 passes through the scraper block 4014, which is used to scrape off the pickling solution adhering to the surface of the metal wire 404. This prevents the metal wire 404 from carrying away pickling solution that could contaminate and corrode other components. It also prevents the metal wire 404 from continuing to react with the pickling solution adhering to its surface after leaving the sample tank 401, which would lead to uncontrollable reaction time between the metal wire 404 and the pickling solution, resulting in inaccurate concentration detection results.

[0045] In some preferred embodiments, see Figure 2 A second level gauge 414 is installed on the sample tank 401. The second level gauge 414 is electrically connected to the main control module 1 and is used to detect the level of the pickling solution in the sample tank 401. The circular guide post 4013 is positioned higher than the impurity detection components (such as the illumination lamp 402 and the camera 403).

[0046] In practical operation, the pickling solution level in sample tank 401 can be initially set between the impurity detection component and the circular guide column 4013. This ensures that the impurity content of the pickling solution can be detected while preventing the metal wire 404 from reacting with the pickling solution. If the impurity content of the pickling solution exceeds the standard, the pickling solution is directly discharged back to the pickling solution storage tank 2 without further concentration detection, thus avoiding unnecessary consumption of the metal wire 404. At this time, the pickling solution level in sample tank 401 can be accurately controlled by the second level gauge 414. In addition, during concentration detection, the pickling solution level in sample tank 401 can also be accurately controlled to reach the preset upper limit height (which can be set according to actual needs). This allows for accurate control of the reaction time between the metal wire 404 and the pickling solution when the metal wire 404 moves at a constant speed (when the liquid level is constant, the time required for the metal wire 404 to pass through the pickling solution at a constant speed is also constant, thus achieving the effect of accurately controlling the reaction time).

[0047] In some preferred embodiments, a temperature sensor 415 is provided on the sample tank 401. The temperature sensor 415 is electrically connected to the main control module 1 and is used to detect the temperature of the pickling solution in the sample tank 401. In fact, the reaction rate between the metal wire 404 and the pickling solution is also affected by temperature. By measuring the temperature of the pickling solution through the temperature sensor 415, the concentration detection results can be corrected, which can further improve the accuracy of the detection results.

[0048] Specifically, see Figure 1The pickling solution storage tank 2 is equipped with a supply port with an output solenoid valve 201 and a return port with a return solenoid valve 202. Both the output solenoid valve 201 and the return solenoid valve 202 are electrically connected to the main control module 1. The supply port is used to connect to the spray device of the silicon steel strip pickling device to output pickling solution to the spray device. The return port is used to connect to the pickling tank of the silicon steel strip pickling device to allow the pickling solution in the pickling tank to flow back to the pickling solution storage tank 2, realizing the recycling of the pickling solution. In addition, the return port can also be connected to an external water supply system or a pre-prepared pickling solution supply system. When replacing the pickling solution in the pickling solution storage tank 2, after the pickling solution is discharged, water can be input from the return port and acid stock solution can be input from the acid stock solution storage tank 3 according to a preset ratio, or pre-prepared pickling solution can be directly input from the return port.

[0049] Furthermore, see Figure 1 The pickling solution storage tank 2 is equipped with a first level gauge 9, which is electrically connected to the main control module 1 and is used to detect the level of the pickling solution in the pickling solution storage tank 2. When replacing the pickling solution and adjusting its concentration, it is necessary to calculate and control the amount of acid stock solution to be added based on the level of the pickling solution. The level of the pickling solution can be obtained in real time through the first level gauge 9.

[0050] Preferably, see Figure 1 The automatic pickling solution concentration regulating device also includes a waste liquid tank 10. A drain pump 6 is connected between the pickling solution storage tank 2 and the waste liquid tank 10, and is used to discharge the pickling solution to the waste liquid tank 10 when the pickling solution in the pickling solution storage tank 2 is replaced. The waste liquid tank 10 is used to recycle the pickling solution, which facilitates unified and harmless treatment.

[0051] refer to Figure 4 This application provides a control method for an automatic pickling solution concentration adjustment device as described above, applied to the main control module 1 of the automatic pickling solution concentration adjustment device, including the following steps: A1. Control the infusion pump 5 to deliver the pickling solution in the pickling solution storage tank 2 to the sample tank 401 of the concentration detection device 4, and detect whether the impurity content of the pickling solution in the sample tank 401 exceeds the standard through the impurity detection component. A2. If the impurity content of the pickling solution in sample tank 401 exceeds the standard, the pickling solution in pickling solution storage tank 2 will be replaced by draining the solution through drain pump 6. A3. If the impurity content of the pickling solution in the sample tank 401 does not exceed the standard, the concentration of the pickling solution in the sample tank 401 is detected by the concentration detection component, and according to the concentration detection result, the acid stock solution is delivered to the pickling solution storage tank 2 by the liquid inlet pump 7 to adjust the concentration of the pickling solution in the pickling solution storage tank 2.

[0052] When the impurity content of the pickling solution exceeds the standard, it cannot be used to pickle silicon steel strips and must be replaced. When the impurity content of the pickling solution does not exceed the standard, it can continue to be used to pickle silicon steel strips, but the concentration will be reduced, so acid stock solution needs to be added to increase the concentration.

[0053] In step A1, the pickling solution in the pickling solution storage tank 2 can be periodically transported to the concentration detection device 4 for detection according to a preset cycle (which can be set according to actual needs).

[0054] Specifically, step A1 includes: The infusion pump 5 is controlled to deliver the pickling solution in the pickling solution storage tank 2 to the sample tank 401 of the concentration detection device 4, so that the pickling solution level in the sample tank 401 reaches the first preset level; the first preset level is located between the circular guide column 4013 and the impurity detection component (the specific level can be set according to actual needs). The impurity content of the pickling solution in sample tank 401 is detected by the impurity detection component to determine whether it exceeds the standard.

[0055] For example, when the impurity detection component includes a camera 403 and an illumination lamp 402, it acquires a photo taken by the camera 403 under the illumination of the illumination lamp 402, calculates the average brightness of the pixels in the photo, and if the average brightness is lower than a preset brightness threshold (which can be set according to actual needs), it determines that the impurity content exceeds the standard; otherwise, it determines that the impurity content does not exceed the standard. When the impurity detection component includes a turbidity sensor, it acquires the turbidity collected by the turbidity sensor, and if the turbidity exceeds a preset turbidity threshold (which can be set according to actual needs), it determines that the impurity content exceeds the standard; otherwise, it determines that the impurity content does not exceed the standard.

[0056] In step A2, when replacing the pickling solution in the pickling solution storage tank 2 by draining the liquid using the drain pump 6, first drain all the pickling solution in the pickling solution storage tank 2 using the drain pump 6, and then input the water and acid stock solution in the acid stock solution storage tank 3 into the pickling solution storage tank 2 according to the preset ratio (set according to actual needs), or input the pre-prepared pickling solution into the pickling solution storage tank 2.

[0057] In step A3, the concentration of the pickling solution in sample tank 401 is detected by a concentration detection component, including: A301. Control the infusion pump 5 to deliver the pickling solution in the pickling solution storage tank 2 to the sample tank 401 of the concentration detection device 4, so that the pickling solution level in the sample tank 401 reaches the second preset level; the second preset level is higher than the lower end of the circular guide column 4013 (the specific level can be set according to actual needs). A302. Control the servo motor 407 to rotate and wind the metal wire 404, so that the metal wire 404 moves at a constant speed at a preset speed (set according to actual needs), and within a first preset time (set according to actual needs, this first preset time is not less than the time interval between the start time of controlling the servo motor 407 and the time when the position of the metal wire 404 first contacting the pickling solution completely passes through the range of the second exposed section 4042), so as to... Figure 2 For example, L is the liquid level line, and the position from point a to point b on the metal wire 404 is the first position to contact the pickling solution. After the first preset time is not less than the time required for point b to move to the second brush 409 on the lower left side, the resistance of the first exposed section 4041 and the second exposed section 4042 is continuously detected within the second preset time (set according to actual needs). A303. Calculate the average resistance of the first exposed section 4041 detected within a second preset time period as the resistance detection result of the first exposed section 4041; and calculate the average resistance of the second exposed section 4042 detected within a second preset time period as the resistance detection result of the second exposed section 4042. A304. Calculate the corrosion thickness of the second exposed section 4042 based on the resistance test results of the first exposed section 4041 and the second exposed section 4042; for example, calculate the corrosion thickness of the second exposed section 4042 using the following formula: ; in, The corrosion thickness of the second exposed section 4042. The resistivity of the 404 stainless steel wire is given. The length of the first exposed segment 4041 (pre-calibrated). The length of the second exposed section 4042 (pre-calibrated). The resistance test results for the first exposed section 4041 are as follows. The resistance test results for the second exposed section 4042; A305. Calculate the corrosion rate of the pickling solution on the metal wire 404 based on the corrosion thickness of the second exposed section 4042; for example, calculate the corrosion rate using the following formula: ; in, For corrosion rate, This refers to the moving speed of the 404 metal wire (i.e., the preset speed mentioned earlier). The length of the portion of the 404 metal wire below the surface of the pickling solution (when the pickling solution level is the second preset level). (Fixed and can be measured in advance); A306. Calculate the concentration of the pickling solution in sample tank 401 based on the temperature and corrosion rate of the pickling solution. For example, theoretical calculations can be performed based on the principle of chemical reaction (this is existing technology and will not be described in detail here), or the corrosion rate of pickling solutions of different concentrations on metal wire 404 under different temperature conditions can be determined in advance, and then a binary function of corrosion rate with respect to temperature and pickling solution concentration can be fitted. Here, the temperature and corrosion rate of the pickling solution are substituted into the binary function to solve for the pickling solution concentration (i.e., the concentration detection result is obtained).

[0058] In step A3, based on the concentration detection results, the acid stock solution is delivered to the pickling solution storage tank 2 via the inlet pump 7 to adjust the concentration of the pickling solution in the pickling solution storage tank 2, including: A307. Obtain the level of pickling solution in pickling solution storage tank 2 and record it as the initial level; A308. Calculate the volume of pickling solution in pickling solution storage tank 2 based on the original liquid level, and record it as the original volume; the relationship between the liquid level and volume of pickling solution in pickling solution storage tank 2 is related to the specific shape of pickling solution storage tank 2. The conversion relationship between the liquid level and volume of pickling solution in pickling solution storage tank 2 can be calibrated in advance. Here, the volume of pickling solution in pickling solution storage tank 2 is calculated based on the conversion relationship. A309. Calculate the amount of acid stock solution to be added based on the original volume and concentration test results; for example, calculate the amount of acid stock solution to be added using the following formula: ; in, This refers to the amount of acid stock solution added. For the original volume, This represents the target concentration of the pickling solution. This represents the concentration of the original acid solution. This is the concentration detection result; A310. Based on the calculation of the amount of acid stock solution added, control the inlet pump 7 to deliver the acid stock solution to the pickling solution storage tank 2.

[0059] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0060] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An automatic pickling solution concentration adjustment device, characterized in that, It includes a main control module (1), a pickling solution storage tank (2), an acid stock solution storage tank (3), a concentration detection device (4), an infusion pump (5), a drain pump (6), and an inlet pump (7); the main control module (1) is electrically connected to the concentration detection device (4), the infusion pump (5), the drain pump (6), and the inlet pump (7); The pickling solution storage tank (2) is used to store pickling solution; the acid stock solution storage tank (3) is used to store acid stock solution, wherein the acid stock solution is an acid solution of the same type as the pickling solution but with a higher concentration; the inlet pump (7) is connected between the pickling solution storage tank (2) and the acid stock solution storage tank (3) and is used to pump the acid stock solution in the acid stock solution storage tank (3) to the pickling solution storage tank (2); the outlet pump (6) is connected to the pickling solution storage tank (2) and is used to discharge the pickling solution from the pickling solution storage tank (2) when the pickling solution in the pickling solution storage tank (2) is replaced. The concentration detection device (4) includes a sample tank (401), an impurity detection component, and a concentration detection component; the infusion pump (5) is connected between the sample tank (401) and the pickling solution storage tank (2), and is used to transport the pickling solution in the pickling solution storage tank (2) to the sample tank (401); the impurity detection component is used to detect whether the impurity content of the pickling solution in the sample tank (401) exceeds the standard; the concentration detection component is used to detect the concentration of the pickling solution in the sample tank (401); The main control module (1) is used to replace the pickling solution in the pickling solution storage tank (2) by draining the solution through the drain pump (6) according to the detection result of the concentration detection device (4), or to transport the acid stock solution through the inlet pump (7) to adjust the concentration of the pickling solution in the pickling solution storage tank (2). The sample groove (401) has an opening at the top, and a circular guide post (4013) extending laterally is provided inside the sample groove (401). The concentration detection assembly includes an unwinding shaft (405) for unwinding the metal wire (404), a winding shaft (406) for winding the metal wire (404), a servo motor (407) for driving the winding shaft (406) to rotate, a resistance detection circuit, and a guide roller assembly disposed between the unwinding shaft (405) and the winding shaft (406); the servo motor (407) and the resistance detection circuit are both electrically connected to the main control module (1); The metal wire (404) is capable of reacting with the pickling solution. The metal wire (404) is wound around the guide roller group and the circular guide post (4013) and forms a first exposed section (4041) upstream of the circular guide post (4013) and a second exposed section (4042) downstream of the circular guide post (4013) outside the sample tank (401). The resistance detection circuit is used to detect the resistance of the first exposed section (4041) and the second exposed section (4042) and send it to the main control module (1) so that the main control module (1) can determine the concentration of the pickling solution in the sample tank (401) by comparing the resistance of the first exposed section (4041) and the second exposed section (4042).

2. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, The sample cell (401) has a transparent wall, and the impurity detection assembly includes an illumination lamp (402) and a camera (403) disposed opposite to each other on both sides of the sample cell (401).

3. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, The resistance detection circuit includes two first brushes (408), two second brushes (409), a first resistance detection module (410), and a second resistance detection module (411). The two first brushes (408) are in contact with the two ends of the first exposed section (4041), and the two second brushes (409) are in contact with the two ends of the second exposed section (4042). The first resistance detection module (410) is connected to the two first brushes (408) and is used to detect the resistance of the first exposed section (4041) between the two first brushes (408); the second resistance detection module (411) is connected to the two second brushes (409) and is used to detect the resistance of the second exposed section (4042) between the two second brushes (409).

4. The automatic pickling solution concentration adjustment device according to claim 3, characterized in that, The guide roller group includes multiple guide rollers (412), and at least one of the guide rollers (412) is connected to a rotary encoder (413), which is electrically connected to the main control module (1).

5. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, A second level gauge (414) is provided on the sample tank (401). The second level gauge (414) is electrically connected to the main control module (1) and is used to detect the level of the pickling solution in the sample tank (401). The circular guide post (4013) is positioned higher than the impurity detection component.

6. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, A temperature sensor (415) is provided on the sample tank (401). The temperature sensor (415) is electrically connected to the main control module (1) and is used to detect the temperature of the pickling solution in the sample tank (401).

7. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, The pickling solution storage tank (2) is equipped with a first level gauge (9), which is electrically connected to the main control module (1) and is used to detect the level of the pickling solution in the pickling solution storage tank (2).

8. The automatic pickling solution concentration adjustment device according to claim 1, characterized in that, It also includes a waste liquid pool, and the drain pump (6) is connected between the pickling solution storage tank (2) and the waste liquid pool, and is used to discharge the pickling solution to the waste liquid pool when the pickling solution in the pickling solution storage tank (2) is replaced.

9. A control method for an automatic pickling solution concentration adjustment device as described in any one of claims 1-8, characterized in that, The main control module (1) applied to the automatic pickling solution concentration adjustment device includes the following steps: A1. Control the infusion pump (5) to deliver the pickling solution in the pickling solution storage tank (2) to the sample tank (401) of the concentration detection device (4), and detect whether the impurity content of the pickling solution in the sample tank (401) exceeds the standard by the impurity detection component. A2. If the impurity content of the pickling solution in the sample tank (401) exceeds the standard, the pickling solution in the pickling solution storage tank (2) is replaced by draining the solution through the drain pump (6). A3. If the impurity content of the pickling solution in the sample tank (401) does not exceed the standard, the concentration of the pickling solution in the sample tank (401) is detected by the concentration detection component, and according to the concentration detection result, the acid stock solution is delivered to the pickling solution storage tank (2) by the inlet pump (7) to adjust the concentration of the pickling solution in the pickling solution storage tank (2).

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