Water-cooling ingot mould device for preparing nanocrystalline master alloy and control method of water-cooling ingot mould device

Abstract

The invention discloses a water-cooling ingot mold device for preparing nanocrystalline master alloy and a control method of the water-cooling ingot mold device, and relates to the technical field of mold cooling. The water-cooling ingot mold device based on nanocrystalline master alloy preparation comprises a water-cooling ingot mold, a plurality of water-cooling pipes are rotatably installed on the water-cooling ingot mold, every two adjacent water-cooling pipes are communicated through a connector, and when cold water is introduced into the water-cooling pipes, the cold water rotates around the axes of the water-cooling pipes; a data acquisition module and a data analysis module are arranged on the water-cooling ingot mold, the data acquisition module is used for acquiring in-mold temperature data of the water-cooling ingot mold in each time period in real time, and the data analysis module is used for analyzing the in-mold temperature data of the water-cooling ingot mold in each time period in real time. A circulating water adjusting valve is arranged on the outer side wall of the water injection end of the water supply pipe and used for adjusting the flow speed of cold water according to the real-time analysis result of the data analysis module. The flow rate of cold water is adjusted in real time through a PID control algorithm.

Description

Technical Field

[0001] The invention relates to the technical field of mold cooling, in particular to a water-cooled ingot mold device for preparing nanocrystalline master alloy and a control method thereof. Background Art

[0002] In the prior art, when producing nanocrystalline master alloy ingots, liquid nanocrystalline master alloy is cast into the cavity of a water-cooled ingot mold, and the nanocrystalline master alloy ingot is obtained after the liquid nanocrystalline master alloy is cooled and solidified.

[0003] like Figure 1 As shown, a plurality of interconnected flow channels are provided inside the water-cooled ingot mold. When producing nanocrystalline master alloy ingots, a water pump supplies cooling water into the flow channels. Through the rapid circulation of the cooling water, the heat on the water-cooled ingot mold interacts with the outside world, thereby achieving the purpose of rapid cooling.

[0004] However, in the actual production process, Figure 1 As shown, when the cooling water flows rapidly in the flow channel, side a is closer to the cavity, and the temperature difference with the cavity is larger. The thermal interaction rate between the cooling water on side a and the cavity is larger, so that the cooling water on side a can carry more heat. However, on side b, which is farther away from the cavity, the cooling water on side b cannot directly interact thermally with the cavity. The heat in the cavity needs to be transferred to side b through the cooling water on side a. Compared with the temperature difference between the cooling water on side a and the cavity, the temperature difference between the cooling water on side b and the cooling water on side a is smaller, resulting in a smaller thermal interaction rate on side b. Therefore, when the cooling water passes through the flow channel in a straight line, the heat carried by the cooling water on side b is lower than the heat carried by the cooling water on side a, which results in the cooling efficiency of the cooling water on side b being lower than that of the cooling water on side a, resulting in a loss of cooling effect for each cooling water cycle, resulting in a decrease in the cooling efficiency of the water-cooled ingot mold, affecting the production efficiency of nanocrystalline master alloy ingots. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a water-cooled ingot mold device for preparing nanocrystalline master alloy and a control method thereof, which solves the problem of insufficient cooling efficiency of the water-cooled mold in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a water-cooled ingot mold device based on nanocrystalline master alloy preparation, comprising a water-cooled ingot mold, a water supply pipe for conveying cold water is fixedly arranged on the outer side of the water-cooled ingot mold, a plurality of water-cooling pipes are rotatably installed on the water-cooled ingot mold, two adjacent water-cooling pipes are connected by a joint, and when cold water is passed into the water-cooling pipe, the cold water rotates around the axis of the water-cooling pipe; a data acquisition module and a data analysis module are arranged on the water-cooled ingot mold, the data acquisition module is used for real-time acquisition of the mold temperature data of each time period of the water-cooled ingot mold, the data analysis module is used for real-time analysis of the mold temperature data of each time period of the water-cooled ingot mold, and a circulating water regulating valve is arranged on the outer side wall of the water supply pipe water injection end, i.e., the end away from the water outlet end, and the circulating water regulating valve is used to adjust the cold water flow rate according to the real-time analysis result of the data analysis module.

[0007] Furthermore, a blade is axially fixedly connected inside the water cooling tube, and the width of the blade is smaller than the inner diameter of the water cooling tube.

[0008] Furthermore, a shell is rotatably mounted on the water cooling tube, a rotor is rotatably mounted inside the shell, and the rotor is coaxially connected to the water cooling tube.

[0009] Furthermore, the rotor is provided with a plurality of through holes to connect the inside and outside of the rotor, and the axis of each through hole is not perpendicular to any tangent line of the rotor.

[0010] Furthermore, a first friction wheel is coaxially fixedly connected to the water cooling tube, a connecting piece is sleeved on two adjacent water cooling tubes, a second friction wheel is rotatably mounted on the connecting piece, and the first friction wheel cooperates with the second friction wheel.

[0011] A control method for a water-cooled ingot mold device for preparing nanocrystalline master alloys comprises the following steps: when liquid nanocrystalline master alloy is cast into the water-cooled ingot mold, cold water of an initial flow rate is transported to the water-cooling pipe through a circulating water regulating valve via a water supply pipe, and the cold water circulates in the water-cooling pipe under the connection of a joint to cool the water-cooled ingot mold; the in-mold temperature data of each time period of the water-cooled ingot mold is acquired in real time via a data acquisition module, and data analysis is performed via a data analysis module to obtain the in-mold real-time cooling rate of each time period of the water-cooled ingot mold, and then the in-mold real-time cooling rate of each time period of the water-cooled ingot mold is compared and analyzed in real time with a preset cooling standard rate, and the initial flow rate is adjusted via the circulating water regulating valve according to the real-time comparison and analysis result.

[0012] Furthermore, the in-mold temperature value of the water-cooled ingot mold is acquired in real time, and data analysis is performed to obtain the real-time in-mold cooling rate of the water-cooled ingot mold in each time period. Specifically, the in-mold temperature value of each measuring position at each time point of each time period of the water-cooled ingot mold is acquired in real time, and mean analysis is performed in combination with the moving exponential averaging method to obtain the in-mold temperature mean at each time point of each time period of the water-cooled ingot mold; the in-mold temperature mean at each time point of each time period of the water-cooled ingot mold is comprehensively analyzed to obtain the real-time in-mold cooling rate of the water-cooled ingot mold in each time period.

[0013] Furthermore, the specific formula for calculating the mean temperature inside the mold at each time point in each period of the water-cooled ingot mold and the real-time cooling rate inside the mold in each period is as follows: ;in, For water-cooled ingot mold The first The average temperature in the mold at each time point, For water-cooled ingot mold The first The time point The in-mold temperature value at each measuring position, For water-cooled ingot mold The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, For water-cooled ingot mold The first The time point The in-mold temperature value at each measuring position, For water-cooled ingot mold The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, , For water-cooled ingot mold The real-time cooling rate in the mold during each period, For water-cooled ingot mold The first The average temperature in the mold at each time point, , is the number of time periods, , is the number of time points, , is the number of measurement locations.

[0014] Furthermore, the real-time cooling rate of the water-cooled ingot mold in each time period is compared and analyzed with the preset standard cooling rate in real time, and the specific steps of adjusting the initial flow rate through the circulating water regulating valve according to the real-time comparison and analysis results are as follows: the real-time cooling rate of the water-cooled ingot mold in each time period is compared and analyzed with the preset standard cooling rate in real time to obtain the time period cooling rate difference of the water-cooled ingot mold; the initial flow rate and the time period cooling rate difference of each time period of the water-cooled ingot mold are combined with PID analysis to obtain the adjusted flow rate of the next time period corresponding to each time period of the water-cooled ingot mold, and input them into the circulating water regulating valve to adjust the flow rate of the cold water flow rate of the next time period corresponding to each time period.

[0015] Furthermore, the specific formula for calculating the difference in the cooling rate of each time period of the water-cooled ingot mold and the adjusted flow rate of the next time period corresponding to each time period is as follows: ;in, For water-cooled ingot mold The difference in cooling rate between the time periods, For water-cooled ingot mold The real-time cooling rate in the mold during each period, is the preset standard cooling rate, For water-cooled ingot mold The adjusted flow rate of the next time period corresponding to the time period, is the initial flow rate of cold water, is the proportional gain stored in the database, is the integral gain stored in the database, For water-cooled ingot mold The first The difference in cooling rate at each time point is is the differential gain stored in the database, , is the number of time periods, , is the number of time points.

[0016] The invention provides a water-cooled ingot mold device for preparing nanocrystalline master alloys, and the beneficial effect is that when the water-cooled ingot mold device for preparing nanocrystalline master alloys is cooled by passing cold water into the water-cooled ingot mold, the rotor is driven to rotate by hydraulic power, so that the water-cooled pipe and the blades are rotated, so that the cold water can rotate around the axis of the water-cooled pipe, and during the rotation of the cold water, the cold water on both sides of the water-cooled pipe can perform thermal interaction with the cavity to improve the efficiency of thermal interaction, and according to the density characteristics of water, the cold water at the axis of the water-cooled pipe is made to perform centrifugal motion during the rotation process, so as to ensure that the cold water at the wall of the water-cooled pipe can maintain a relatively large temperature difference with the cavity, further improve the thermal interaction efficiency between the cold water and the cavity temperature, and obtain the in-mold temperature data of each period of the water-cooled ingot mold in real time through the data acquisition module, and analyze it in combination with the data analysis module to obtain the in-mold real-time cooling rate of the water-cooled ingot mold. The in-mold real-time cooling rate of each period is compared and analyzed in real time with the preset standard cooling rate, and the initial flow rate is adjusted by the circulating water regulating valve according to the real-time comparison and analysis results. This method combines the moving exponential average method for mean analysis to ensure the accuracy of data analysis, and adjusts the cold water flow rate in real time through the PID control algorithm to eliminate the steady-state error and response delay of the system, making the cooling process more accurate and stable.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a water-cooled ingot mold in the prior art.

[0019] Figure 2 This is a schematic structural diagram of a water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed in the present invention.

[0020] Figure 3 This is a top view of a water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention.

[0021] Figure 4 A water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention Figure 3 AA section view.

[0022] Figure 5 A water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention Figure 4 A partial enlarged view.

[0023] Figure 6 A water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention Figure 3 Middle BB section.

[0024] Figure 7A water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention Figure 6 Enlarged view of center C.

[0025] Figure 8 This is a schematic structural diagram of a water-cooling tube of a water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed in the present invention.

[0026] Fig. 9 A water-cooled ingot mold device for preparing a nanocrystalline master alloy proposed by the present invention Figure 8 Enlarged view of point D in the middle.

[0027] Fig.10 A schematic diagram of the structure inside the shell of a water-cooled ingot mold device for preparing nanocrystalline master alloys proposed by the present invention Figure 1 .

[0028] Fig.11 A schematic diagram of the structure inside the shell of a water-cooled ingot mold device for preparing nanocrystalline master alloys proposed by the present invention Figure 2 .

[0029] Fig.12 This is a flow chart of a control method for a water-cooled ingot mold device based on nanocrystalline master alloy preparation according to the present invention.

[0030] In the figure: 1. water-cooled ingot mold; 2. water supply pipe; 3. shell; 4. rotor; 41. through hole; 5. water-cooling pipe; 6. first friction wheel; 7. blade; 8. joint; 9. second friction wheel; 10. connecting piece. DETAILED DESCRIPTION

[0031] The embodiment of the present application solves the problem of insufficient cooling efficiency of the water-cooled mold in the prior art by providing a water-cooled ingot mold device for preparing nanocrystalline master alloy and a control method thereof.

[0032] Example 1: Reference Figure 1-Figure 2 A water-cooled ingot mold device for preparing nanocrystalline master alloy includes a water-cooled ingot mold 1. The cavity of the water-cooled ingot mold 1 can be customized into a required shape according to actual needs to meet customer requirements. A plurality of water-cooled tubes 5 are rotatably installed on the water-cooled ingot mold 1, and two adjacent water-cooled tubes 5 are connected via a joint 8.

[0033] When producing nanocrystalline master alloy ingots, liquid nanocrystalline master alloy is cast into a water-cooled ingot mold, and then cold water is introduced into the water-cooling pipe 5. With the connection of the joint 8, the cold water circulates in the water-cooling pipe 5 to cool the water-cooled ingot mold.

[0034] When the cold water flows in the water-cooling pipe 5 , the water-cooling pipe 5 is rotated, and the cold water inside the water-cooling pipe 5 is driven to rotate and mix with each other during the rotation process.

[0035] The temperature of the cold water before entering the water-cooling tube 5 is usually 28-32 degrees Celsius, while the temperature of the liquid nanocrystalline master alloy before casting reaches more than 1000 degrees Celsius, so the temperature of the cold water in the water-cooling tube 5 will increase after being cast into the water-cooling ingot mold 1.

[0036] like Figure 1 As shown, when the cold water passes through the water-cooling pipe 5, the temperature of the cold water is higher at a position closer to the inner wall of the water-cooling pipe 5, and the temperature of the cold water is lower at a position closer to the axis of the water-cooling pipe 5.

[0037] Based on known technology, it is known that the higher the temperature of water is above 4 degrees Celsius, the lower its density is.

[0038] Based on the above description, it can be known that the density of the cold water near the axis of the water-cooling tube 5 is greater than the temperature of the cold water near the tube wall. Therefore, during the rotation of the water-cooling tube 5, the cold water at the axis will perform centrifugal motion and move toward the inner wall of the water-cooling tube 5, so that the cold water at the axis of the water-cooling tube 5 interacts with the cold water at the inner wall, thereby ensuring that the cold water at the inner wall of the water-cooling tube 5 and the water-cooled ingot mold 1 always maintain a large temperature difference, so as to improve the thermal interaction efficiency between the cold water and the water-cooled ingot mold 1, thereby improving the cooling efficiency.

[0039] Embodiment 2: as Figure 3-Figure 7 As shown, a blade 7 is axially fixedly connected to the water-cooling tube 5, and the width of the blade 7 is smaller than the inner diameter of the water-cooling tube 5. During the rotation of the water-cooling tube 5, the blade 7 can push the cold water in the tube to rotate along with the water-cooling tube 5, thereby ensuring that the rotation speed of the cold water in the tube can reach the rotation speed required for the centrifugal motion in the above-mentioned embodiment 1.

[0040] Embodiment 3: Figure 4-Figure 7 As shown, a shell 3 is rotatably installed on the water-cooling tube 5, a water supply pipe 2 is fixedly connected to the shell 3, a rotor 4 is rotatably installed in the shell 3, the rotor 4 is coaxially connected to the water-cooling tube 5, a plurality of through holes 41 are opened on the rotor 4 to connect the inside and outside of the rotor 4, and the axis of each through hole 41 is not perpendicular to any tangent of the rotor 4.

[0041] The water supply pipe 2 supplies cold water into the shell 3. After the cold water enters the shell 3, it will enter the inside of the rotor 4 through the through holes opened on the rotor 4. During this process, the rotor rotates due to the reverse force. During the rotation of the rotor 4, it will provide power to the water-cooling pipe 5, thereby causing the water-cooling pipe 5 and the blades 7 connected to the rotor 4 to rotate.

[0042] like Figure 8-Figure 11 As shown, a first friction wheel 6 is coaxially fixedly connected to the water cooling tube 5, a connecting piece 10 is sleeved on two adjacent water cooling tubes 5, and a second friction wheel 9 is rotatably mounted on the connecting piece 10, and the first friction wheel 6 cooperates with the second friction wheel 9.

[0043] When one of the water-cooling tubes 5 rotates, the water-cooling tube 5 drives the first friction wheel 6 to rotate, and through the transmission of the second friction wheel 9, the first friction wheels 6 on other water-cooling tubes 5 will also rotate, thereby causing all the water-cooling tubes 5 to rotate.

[0044] Working principle and workflow: When producing nanocrystalline master alloy ingots, liquid nanocrystalline master alloy is cast into a water-cooled ingot mold, and the water supply pipe 2 supplies water to the shell 3. After the cold water enters the shell 3, it will enter the inside of the rotor 4 through the through holes provided on the rotor 4. During this process, the rotor rotates due to the reverse force. During the rotation of the rotor 4, it will provide power to the water-cooling pipe 5, thereby causing the water-cooling pipe 5 and the blades 7 connected to the rotor 4 to rotate.

[0045] When the water-cooling tube 5 connected to the rotor 4 rotates, the water-cooling tube 5 drives the first friction wheel 6 to rotate, and through the transmission of the second friction wheel 9, the first friction wheels 6 on other water-cooling tubes 5 will also rotate, thereby causing all the water-cooling tubes 5 to rotate.

[0046] The temperature of the cold water before entering the water cooling tube 5 is usually 28-32 degrees Celsius, while the temperature of the liquid nanocrystalline master alloy before casting reaches above 1000 degrees Celsius. Therefore, after the liquid nanocrystalline master alloy is cast into the water-cooled ingot mold 1, the temperature of the cold water in the water cooling tube 5 will increase.

[0047] like Figure 1 As shown, when the cold water passes through the water-cooling pipe 5, the temperature of the cold water is higher at a position closer to the inner wall of the water-cooling pipe 5, and the temperature of the cold water is lower at a position closer to the axis of the water-cooling pipe 5.

[0048] As is well known, the higher the temperature of water is above 4 degrees Celsius, the lower its density is.

[0049] Based on the above description, it can be known that the density of the cold water near the axis of the water-cooling tube 5 is greater than the temperature of the cold water near the tube wall. Therefore, during the rotation of the water-cooling tube 5, the cold water at the axis will perform centrifugal motion and move toward the inner wall of the water-cooling tube 5, so that the cold water at the axis of the water-cooling tube 5 interacts with the cold water at the inner wall, thereby ensuring that the cold water at the inner wall of the water-cooling tube 5 and the water-cooled ingot mold 1 always maintain a large temperature difference, so as to improve the thermal interaction efficiency between the cold water and the water-cooled ingot mold 1, thereby improving the cooling efficiency.

[0050] A blade 7 is axially fixedly connected to the water-cooling tube 5, and the width of the blade 7 is smaller than the inner diameter of the water-cooling tube 5. During the rotation of the water-cooling tube 5, the blade 7 can push the cold water in the tube to rotate along with the water-cooling tube 5, so that the positions of the cold water on the a side and the cold water on the b side are alternated to ensure that the cold water on the a side and the b side can both thermally interact with the cavity, and the blade 7 driving the cold water to rotate can also ensure that the rotation speed of the cold water in the tube can reach the rotation speed required for the above-mentioned centrifugal motion.

[0051] See also Fig.12 , a control method for a water-cooled ingot mold device based on the preparation of nanocrystalline master alloy, comprising the following steps: when liquid nanocrystalline master alloy is cast into a water-cooled ingot mold 1, cold water with an initial flow rate is transported to a water-cooled pipe 5 through a circulating water regulating valve via a water supply pipe 2, and the cold water circulates in the water-cooled pipe 5 under the connection of a joint 8 to cool the water-cooled ingot mold 1; the in-mold temperature data of each time period of the water-cooled ingot mold 1 is acquired in real time via a data acquisition module, and data analysis is performed via a data analysis module to obtain the in-mold real-time cooling rate of each time period of the water-cooled ingot mold 1, and then the in-mold real-time cooling rate of each time period of the water-cooled ingot mold 1 is compared and analyzed in real time with a preset cooling standard rate, and the initial flow rate is adjusted via a circulating water regulating valve according to the real-time comparison and analysis results.

[0052] Specifically, the in-mold temperature value of the water-cooled ingot mold 1 is acquired in real time, and data analysis is performed to obtain the real-time in-mold cooling rate of the water-cooled ingot mold 1 in each time period. Specifically, the in-mold temperature value of each measuring position at each time point of each time period of the water-cooled ingot mold 1 is acquired in real time, and mean analysis is performed in combination with the moving exponential averaging method to obtain the mean in-mold temperature at each time point of each time period of the water-cooled ingot mold 1; the mean in-mold temperature at each time point of each time period of the water-cooled ingot mold 1 is comprehensively analyzed to obtain the real-time in-mold cooling rate of the water-cooled ingot mold 1 in each time period.

[0053] The specific formula for calculating the mean temperature in the mold at each time point in each period of the water-cooled ingot mold 1 and the real-time cooling rate in the mold in each period is as follows: ;in, For the water-cooled ingot mold 1 The first The average temperature in the mold at each time point, For the water-cooled ingot mold 1 The first The time point The in-mold temperature value at each measuring position, For the water-cooled ingot mold 1 The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, For the water-cooled ingot mold 1 The first The time point The in-mold temperature value at each measuring position, For the water-cooled ingot mold 1 The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, , For the water-cooled ingot mold 1 The real-time cooling rate in the mold during each period, For the water-cooled ingot mold 1 The first The average temperature in the mold at each time point, , is the number of time periods, , is the number of time points, , is the number of measurement locations.

[0054] It needs to be explained that and The specific calculation process is as follows: The first The time point , The in-mold temperature values ​​of the first and second measuring positions are added together to obtain the in-mold temperature and value, and then the first and second measuring positions of the water-cooled ingot mold 1 are added together to obtain the in-mold temperature and value. The first The time point , The in-mold temperature values ​​at the measurement positions are respectively calculated with the in-mold temperature and value, and the ratio results are used as the corresponding weighting coefficients.

[0055] In this embodiment, by acquiring and analyzing the temperature in the mold in real time, the cooling process of the water-cooled ingot mold can be monitored and adjusted more accurately to ensure that the cooling effect meets expectations. By calculating the real-time cooling rate in the mold in each time period, the effect of the cooling system can be evaluated and necessary adjustments can be made to optimize the cooling strategy. The weighted average method takes into account the actual temperature data of each measuring position, which can more comprehensively reflect the actual temperature conditions in the entire mold and provide more accurate data support for subsequent decision-making. Through real-time analysis of the cooling rate, uneven cooling or other problems can be discovered in time, thereby improving equipment reliability and production efficiency. Accurate control of temperature changes can improve product quality and reduce defects or inconsistencies caused by temperature fluctuations.

[0056] Specifically, the real-time cooling rate of the water-cooled ingot mold 1 in each time period is compared and analyzed with the preset standard cooling rate in real time, and the specific steps of adjusting the initial flow rate through the circulating water regulating valve according to the real-time comparison and analysis results are as follows: the real-time cooling rate of the water-cooled ingot mold 1 in each time period is compared and analyzed with the preset standard cooling rate in real time to obtain the time period cooling rate difference of the water-cooled ingot mold 1; the initial flow rate and the time period cooling rate difference of each time period of the water-cooled ingot mold 1 are combined with PID analysis to obtain the adjusted flow rate of the next time period corresponding to each time period of the water-cooled ingot mold 1, and input them into the circulating water regulating valve to adjust the flow rate of the cold water flow rate of the next time period corresponding to each time period.

[0057] The specific formula for calculating the time period cooling rate difference of each time period of the water-cooled ingot mold 1 and the adjustment flow rate of the next time period corresponding to each time period is as follows: ;in, For the water-cooled ingot mold 1 The difference in cooling rate between the time periods, For the water-cooled ingot mold 1 The real-time cooling rate in the mold during each period, is the preset standard cooling rate, For the water-cooled ingot mold 1 The adjusted flow rate of the next time period corresponding to the time period, is the initial flow rate of cold water, is the proportional gain stored in the database, is the integral gain stored in the database, For the water-cooled ingot mold 1 The first The difference in cooling rate at each time point is is the differential gain stored in the database, , is the number of time periods, , is the number of time points.

[0058] It needs to be explained that the proportional gain : The proportional gain controller directly adjusts the output according to the current error. Its function is to make the system respond to the current error. Increasing the proportional gain can make the system respond to the error faster, but too high a proportional gain can cause the system to oscillate or become unstable.

[0059] Integral gain :Integral gain controller adjusts the output according to the accumulated value of error. Its function is to eliminate the steady-state error of the system so that the system can accurately reach the target value. Increasing the integral gain can speed up the elimination of the steady-state error, but too high an integral gain will cause system oscillation and overshoot.

[0060] Differential Gain :The differential gain controller adjusts the output according to the error change rate. Its function is to predict the change trend of the error and reduce the oscillation and overshoot of the system. Increasing the differential gain can reduce the oscillation and overshoot of the system, but too high a differential gain will make the system too sensitive to noise.

[0061] and, , , It can be set by empirical method: initially set the proportional gain, adjust until the system starts to respond and there is no obvious oscillation, increase the integral gain, observe the steady-state error elimination of the system, adjust until the system can eliminate the steady-state error quickly, increase the differential gain, observe the oscillation of the system, adjust until the system responds stably, and it can also be set by Ziegler-Nichols method and Cohen-Coon method.

[0062] In this embodiment, by adjusting the flow rate in real time, the cooling system can more accurately maintain the cooling rate in the mold to meet the preset cooling standards. The PID control algorithm can optimize the response speed and stability of the system, reduce system oscillation and overshoot, and accurately control the flow rate to improve the energy efficiency of the cooling system and reduce unnecessary energy consumption. Stable and precise temperature control can reduce thermal shock of the equipment and extend the service life of the equipment. The stable cooling process can improve the consistency and quality of the product.

[0063] Its specific embodiments are as follows: Assume that the target cooling rate is a constant of −2°C / min, the time interval is 1 minute, and there are the following temperature data at four time points in the current period: 100°C, 98°C, 96°C, and 95°C; Combined with the calculation formula of real-time cooling rate, the real-time cooling rates at three time intervals can be obtained: −2 °C / min, −2 °C / min, −1 °C / min; Combining the calculation formula of the time period cooling rate difference, the time period cooling rate difference of three time intervals can be obtained: 0, 0, -1; Assuming that the proportional gain is 1, the integral gain is 0.1, the differential gain is 0.01, and the initial flow rate is 50L / min, then combining the above data and the calculation formula for the adjusted flow rate of the next period corresponding to the current period, the integral term is -1 and the differential term is -1; Then the adjusted flow rate of the next period corresponding to the current period is: 50−1−0.1−0.01=48.89L / min.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A water-cooled ingot mold device for preparing nanocrystalline master alloy, comprising a water-cooled ingot mold (1), wherein a water supply pipe (2) for conveying cold water is fixedly arranged on the outer side of the water-cooled ingot mold (1), characterized in that: A plurality of water cooling tubes (5) are rotatably mounted on the water cooling ingot mold (1), and two adjacent water cooling tubes (5) are connected via a joint (8). When cold water is introduced into the water cooling tube (5), the cold water rotates around the axis of the water cooling tube (5); The water-cooled ingot mold (1) is provided with a data acquisition module and a data analysis module. The data acquisition module is used to acquire the in-mold temperature data of the water-cooled ingot mold (1) in real time at each time period. The data analysis module is used to perform real-time analysis on the in-mold temperature data of the water-cooled ingot mold (1) at each time period. A circulating water regulating valve is provided on the outer side wall of the water injection end of the water supply pipe (2). The circulating water regulating valve is used to adjust the cold water flow rate according to the real-time analysis result of the data analysis module. The control method is as follows: When the liquid nanocrystalline master alloy is cast into the water-cooled ingot mold (1), cold water at an initial flow rate is delivered to the water-cooling pipe (5) through the circulating water regulating valve via the water supply pipe (2), and the cold water circulates in the water-cooling pipe (5) through the connection of the joint (8) to cool the water-cooled ingot mold (1); The data acquisition module is used to acquire the in-mold temperature data of the water-cooled ingot mold (1) in real time at each time period, and the data analysis module is used to perform data analysis to obtain the in-mold real-time temperature reduction rate of the water-cooled ingot mold (1) in each time period, and then the in-mold real-time temperature reduction rate of the water-cooled ingot mold (1) in each time period is compared and analyzed in real time with a preset temperature reduction standard rate, and the initial flow rate is adjusted through the circulating water regulating valve according to the real-time comparison and analysis result; The temperature value inside the water-cooled ingot mold (1) is obtained in real time, and data analysis is performed to obtain the real-time cooling rate inside the water-cooled ingot mold (1) in each period of time: Real-time acquisition of the in-mold temperature value of each measuring position at each time point in each period of the water-cooled ingot mold (1), and performing mean analysis in combination with the moving exponential average method to obtain the in-mold temperature mean value at each time point in each period of the water-cooled ingot mold (1); Comprehensively analyzing the mean values ​​of the in-mold temperature at each time point in each period of the water-cooled ingot mold (1) to obtain the real-time in-mold temperature reduction rate in each period of the water-cooled ingot mold (1); The specific formula for calculating the average temperature inside the mold of the water-cooled ingot mold (1) at each time point in each period and the real-time cooling rate inside the mold in each period is as follows: ； in, The first step of the water-cooled ingot mold (1) The first The average temperature in the mold at each time point, The first step of the water-cooled ingot mold (1) The first The time point The in-mold temperature value at each measuring position, The first step of the water-cooled ingot mold (1) The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, The first step of the water-cooled ingot mold (1) The first The time point The in-mold temperature value at each measuring position, The first step of the water-cooled ingot mold (1) The first The time point The weighting coefficient of the in-mold temperature value at each measurement position, , The first The real-time cooling rate in the mold during each period, The first step of the water-cooled ingot mold (1) The first The average temperature in the mold at each time point, , is the number of time periods, , is the number of time points, , is the number of measurement positions; The specific steps of comparing and analyzing the real-time cooling rate of the water-cooled ingot mold (1) in each period with the preset standard cooling rate in real time, and adjusting the initial flow rate through the circulating water regulating valve according to the real-time comparison and analysis results are as follows: Performing a real-time difference analysis on the real-time cooling rate in each time period of the water-cooled ingot mold (1) and a preset standard cooling rate to obtain the difference in the cooling rate in each time period of the water-cooled ingot mold (1); The difference between the initial flow rate and the cooling rate of each time period of the water-cooled ingot mold (1) is combined with PID analysis to obtain the adjusted flow rate of the next time period corresponding to each time period of the water-cooled ingot mold (1), and input it into the circulating water regulating valve to adjust the flow rate of the cold water of the next time period corresponding to each time period; The specific formula for calculating the difference in the cooling rate of each time period of the water-cooled ingot mold (1) and the adjusted flow rate of the next time period corresponding to each time period is as follows: ； in, The first step of the water-cooled ingot mold (1) The difference in cooling rate between the time periods, The first step of the water-cooled ingot mold (1) The real-time cooling rate in the mold during each period, is the preset standard cooling rate, The first step of the water-cooled ingot mold (1) The adjusted flow rate of the next time period corresponding to the time period, is the initial flow rate of cold water, is the proportional gain stored in the database, is the integral gain stored in the database, The first step of the water-cooled ingot mold (1) The first The difference in cooling rate at each time point is is the differential gain stored in the database, , is the number of time periods, , is the number of time points.

2. The water-cooled ingot mold device based on nanocrystalline master alloy preparation according to claim 1 is characterized in that: A blade (7) is axially fixedly connected inside the water cooling tube (5), and the width of the blade (7) is smaller than the inner diameter of the water cooling tube (5).

3. The water-cooled ingot mold device based on nanocrystalline master alloy preparation according to claim 1, characterized in that: A housing (3) is rotatably mounted on the water cooling tube (5), a rotor (4) is rotatably mounted inside the housing (3), and the rotor (4) is coaxially connected to the water cooling tube (5).

4. The water-cooled ingot mold device based on nanocrystalline master alloy preparation according to claim 3 is characterized in that: The rotor (4) is provided with a plurality of through holes (41) for connecting the inside and outside of the rotor (4), and the axis of each through hole (41) is not perpendicular to any tangent line of the rotor (4).

5. The water-cooled ingot mold device based on nanocrystalline master alloy preparation according to claim 1, characterized in that: A first friction wheel (6) is coaxially fixedly connected to the water cooling tube (5), a connecting piece (10) is sleeved on two adjacent water cooling tubes (5), a second friction wheel (9) is rotatably mounted on the connecting piece (10), and the first friction wheel (6) cooperates with the second friction wheel (9).

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