Grinding system and its control method

Abstract

The present application discloses a powder grinding system and its control method. The powder grinding system includes an on-line particle size analyzer communicatively connected to a control system. The on-line particle size analyzer performs real-time sampling and detection on the finished particles at the collection device to obtain Dx detection value, D50 detection value, and Dy detection value, and compares them with the preset Dx target value, D50 target value, and Dy target value. If the Dx detection value does not conform to the Dx target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the classifier motor to adjust the frequency according to this control signal. If the D50 detection value does not conform to the D50 target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the fan motor to adjust the frequency according to this control signal. If the Dy detection value does not conform to the Dy target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to adjust the frequency according to this control signal.

Description

Technical Field

[0001] This application relates to the technical field of powder processing, and particularly to a powder grinding system and its control method. Background Art

[0002] The current grinding mill system only has the function of on-line particle size detection, and has no function and role of monitoring the control of the grinding mill. The on-line particle size analyzer and the grinding mill control unit are independent units. Only manual adjustment control can be performed according to the results of the on-line particle size analyzer, and the adjustment method is relatively single, and targeted adjustment cannot be performed according to the fine powder content, medium powder content and coarse powder content in the finished particles. Summary of the Invention

[0003] The purpose of this application is to provide a powder grinding system and its control method, which can solve at least one of the technical problems in the background art.

[0004] To achieve the above purpose, the powder grinding system provided by this application includes a feeding device, a grinding mill, a classifier, a collection device, a dust removal device, a fan and a control system connected in sequence. The feeding device includes a feeding motor, and the feeding motor includes a feeding motor main body and a feeding motor frequency converter. The grinding mill includes a grinding mill motor, and the grinding mill motor includes a grinding mill motor main body and a grinding mill motor frequency converter. The classifier includes a classifier motor, and the classifier motor includes a classifier motor main body and a classifier motor frequency converter. The fan includes a fan motor, and the fan motor includes a fan motor main body and a fan motor frequency converter. The control system is communicatively connected to the feeding motor frequency converter, the grinding mill motor frequency converter, the classifier motor frequency converter and the fan motor frequency converter. The powder grinding system further includes an on-line particle size analyzer communicatively connected to the control system. The on-line particle size analyzer performs real-time sampling detection on the finished particles at the collection device to obtain Dx detection value, D50 detection value and Dy detection value, and compares the Dx detection value, the D50 detection value and the Dy detection value with preset Dx target value, D50 target value and Dy target value respectively. The Dx detection value reflects the coarse powder content in the finished particles, and the Dy detection value reflects the fine powder content in the finished particles;

[0005] If the Dx detection value does not meet the Dx target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the classifier motor frequency converter to adjust the frequency according to the control signal;

[0006] If the D50 detection value does not meet the D50 target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the fan motor frequency converter to adjust the frequency according to the control signal;

[0007] If the detected Dy value does not meet the target Dy value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to adjust the frequency according to this control signal.

[0008] Optionally, if the detected Dx value is greater than the target Dx value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the classifier motor to increase the frequency according to this control signal;

[0009] If the detected Dx value is less than the target Dx value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the classifier motor to decrease the frequency according to this control signal;

[0010] If the detected D50 value is less than the target D50 value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the fan motor to increase the frequency according to this control signal;

[0011] If the detected D50 value is greater than the target D50 value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the fan motor to decrease the frequency according to this control signal;

[0012] If the detected Dy value is less than the target Dy value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to decrease the frequency according to this control signal;

[0013] If the detected Dy value is greater than the target Dy value, the online particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to increase the frequency according to this control signal.

[0014] Optionally, after the frequency converter of the feeding motor, the frequency converter of the fan motor or the frequency converter of the classifier motor adjusts the frequency, at an interval of a set time period, the control system controls the online particle size analyzer to perform real-time sampling and detection on the finished particles at the collection device again to obtain the latest detected Dx value, the latest detected D50 value and the latest detected Dy value, and determines whether the latest detected Dx value, the latest detected D50 value and the latest detected Dy value meet the target Dx value, the target D50 value and the target Dy value respectively.

[0015] Optionally, if at least one of the detected Dx value, the detected D50 value and the detected Dy value does not meet its corresponding target value, the control system first controls the frequency converter of the classifier motor to change the frequency to first make the detected Dx value meet the target Dx value;

[0016] If the Dx detection value meets the Dx target value, and the D50 detection value and the Dy detection value do not meet the D50 target value and the Dy target value respectively, the control system first controls the frequency converter of the fan motor to change the frequency so that the D50 detection value meets the D50 target value first.

[0017] To achieve the above object, the present application also provides a control method for a pulverizing system. The pulverizing system includes a feeding device, a grinding mill, a classifier, a collecting device, a dust removing device, and a fan connected in sequence. The feeding device includes a feeding motor, and the feeding motor includes a feeding motor main body and a feeding motor frequency converter. The grinding mill includes a grinding mill motor, and the grinding mill motor includes a grinding mill motor main body and a grinding mill motor frequency converter. The classifier includes a classifier motor, and the classifier motor includes a classifier motor main body and a classifier motor frequency converter. The fan includes a fan motor, and the fan motor includes a fan motor main body and a fan motor frequency converter;

[0018] The method includes:

[0019] Obtain the Dx detection value, D50 detection value, and Dy detection value of the finished product particles and determine whether they meet the preset Dx target value, D50 target value, and Dy target value respectively, where the Dx detection value reflects the content of coarse powder in the finished product particles, and the Dy detection value reflects the content of fine powder in the finished product particles;

[0020] If the Dx detection value does not meet the Dx target value, control the frequency converter of the classifier motor to adjust the frequency;

[0021] If the D50 detection value does not meet the D50 target value, control the frequency converter of the fan motor to adjust the frequency;

[0022] If the Dy detection value does not meet the Dy target value, control the frequency converter of the feeding motor to adjust the frequency.

[0023] Optionally, if the Dx detection value is greater than the Dx target value, control the frequency converter of the classifier motor to increase the frequency;

[0024] If the Dx detection value is less than the Dx target value, control the frequency converter of the classifier motor to decrease the frequency;

[0025] If the D50 detection value is less than the D50 target value, control the frequency converter of the fan motor to increase the frequency;

[0026] If the D50 detection value is greater than the D50 target value, control the frequency converter of the fan motor to decrease the frequency;

[0027] If the detected value of Dy is less than the target value of Dy, control the frequency converter of the feeding motor to decrease the frequency;

[0028] If the detected value of Dy is greater than the target value of Dy, control the frequency converter of the feeding motor to increase the frequency.

[0029] Optionally, after the frequency of the frequency converter of the feeding motor, the frequency converter of the fan motor, or the frequency converter of the classifier motor is adjusted, obtain the detected value of Dx, the detected value of D50, and the detected value of Dy of the latest finished product particles again at an interval of a set duration, and determine whether the detected value of Dx, the detected value of D50, and the detected value of Dy of the latest finished product particles meet the target value of Dx, the target value of D50, and the target value of Dy, respectively.

[0030] Optionally, if at least one of the detected value of Dx, the detected value of D50, and the detected value of Dy does not meet their respective corresponding target values, first control the frequency converter of the classifier motor to change the frequency to make the detected value of Dx meet the target value of Dx first;

[0031] If the detected value of Dx meets the target value of Dx, and the detected values of D50 and Dy do not meet the target values of D50 and Dy, respectively, first control the frequency converter of the fan motor to change the frequency to make the detected value of D50 meet the target value of D50 first.

[0032] To achieve the above object, the present application also provides an electronic device, including:

[0033] A processor;

[0034] A memory, in which executable instructions of the processor are stored;

[0035] Wherein, the processor is configured to execute the control method as described above by executing the executable instructions.

[0036] To achieve the above object, the present application also provides a computer-readable storage medium, on which a program is stored, and the program implements the control method as described above when executed by a processor.

[0037] The present application also provides a computer program product or a computer program, the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device executes the control method as described above.

[0038] In this application, the Dx detection value, D50 detection value, and Dy detection value in the finished product particles are detected and compared with the corresponding Dx target value, D50 target value, and Dy target value respectively. When the Dx detection value does not meet the Dx target value, the frequency converter of the classifier motor is controlled to adjust the frequency. When the D50 detection value does not meet the D50 target value, the frequency converter of the fan motor is controlled to adjust the frequency. When the Dy detection value does not meet the Dy target value, the frequency converter of the feeding motor is controlled to adjust the frequency. That is to say, when the content of coarse powder, medium powder, or fine powder in the finished product particles deviates from the set value, this application can adjust the frequency by controlling the frequency converter of the classifier motor, the frequency converter of the fan motor, or the frequency converter of the feeding motor to achieve the purpose of adjusting the content of coarse powder, medium powder, and fine powder in the finished product particles, and can realize the targeted adjustment of the content of coarse powder, medium powder, and fine powder in the finished product particles. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the main modules of the milling system according to an embodiment of the present application.

[0040] Figure 2 It is a schematic block diagram of the milling system according to an embodiment of the present application.

[0041] Figure 3 It is a schematic block diagram of the electronic device according to an embodiment of the present application. Detailed Embodiments

[0042] In order to elaborate on the technical content and structural features of the present application in detail, the following further description is provided in conjunction with the embodiments and the accompanying drawings.

[0043] Embodiment 1

[0044] Please refer to Figure 1 and Figure 2 , this application discloses a milling system. The milling system includes a feeding device 1, a mill 2, a classifier 3, a collection device 4, a dust removal device 5, a fan 6, and a control system 7 that are connected in sequence.

[0045] Among them, the feeding device 1 is used to convey the material to be processed to the mill 2 for processing. The feeding device 1 includes a feeding motor 10, and the feeding motor 10 includes a feeding motor main body 11 and a feeding motor frequency converter 12. The amount of fine powder is positively correlated with the feeding amount of the feeding device 1. When the feeding amount is excessive, the material is unbalanced, and over-grinding occurs to the material in the grinding chamber, which is one of the main reasons for generating fine powder. This will cause the finished product particles not to meet the particle size requirements due to excessive fine powder (particles with a particle size smaller than a certain value can be defined as fine powder). When the feeding amount is too small, the output will be low, resulting in equipment waste. Therefore, the frequency of the feeding motor frequency converter 12 can be changed to control the feeding amount, so that the feeding amount is controlled within a suitable range, achieving the purpose of adjusting the fine powder content in the finished product particles. This is beneficial for avoiding the generation of excessive fine powder and ensuring the output. It can be understood that the feeding motor main body 11 and the feeding motor frequency converter 12 can be integrated or separately arranged.

[0046] The mill 2 is used to grind the material to be processed input by the feeding device 1. The mill 2 includes a mill motor 20, and the mill motor 20 includes a mill motor main body 21 and a mill motor frequency converter 22. The frequency of the mill motor main body 21 can be adjusted by using the mill motor frequency converter 22. It can be understood that the mill motor main body 21 and the mill motor frequency converter 22 can be integrated or separately arranged.

[0047] The classifier 3 is used to classify the particles at the discharge end of the mill 2. The fine particles are conveyed downstream through the classification of the classifier 3, and the larger particles are blocked back into the interior of the mill 2, thus achieving the purpose of classification. The classifier 3 includes a classifier motor 30, and the classifier motor 30 includes a classifier motor main body 31 and a classifier motor frequency converter 32. When the frequency of the classifier motor main body 31 becomes lower, the content of coarse powder (particles with a particle size larger than a certain value can be defined as coarse powder) in the finished product particles becomes more. When the frequency of the classifier motor main body 31 becomes higher, the content of coarse powder in the finished product particles becomes less, and the two are inversely correlated. Therefore, the purpose of adjusting the content of coarse powder in the finished product particles can be achieved by adjusting the frequency of the classifier motor main body 31. It can be understood that the classifier motor main body 31 and the classifier motor frequency converter 32 can be integrated or separately arranged.

[0048] The collecting device 4 collects the finished product particles from the particles output by the classifier 3. While the collecting device 4 collects the finished product particles, some finer parts of the particles will enter the dust removal device 5, and the dust removal device 5 collects and outputs the particles entering it.

[0049] The fan 6 is used to form a negative pressure environment in the channel between the classifier 3 and the fan 6 so that the particles automatically flow downstream. The fan 6 includes a fan motor 60, and the fan motor 60 includes a fan motor body 61 and a fan motor frequency converter 62. When the frequency of the fan motor body 61 becomes lower, the particle size of the medium powder (particles with a median particle size) in the finished particles becomes smaller, and when the frequency of the fan motor body 61 becomes higher, the particle size of the medium powder in the finished particles becomes larger, and the two are positively correlated. Therefore, the purpose of adjusting the medium powder content in the finished particles can be achieved by adjusting the frequency of the fan motor body 61. It can be understood that the fan motor body 61 and the fan motor frequency converter 62 can be integrated together or can be separately set.

[0050] The control system 7 is in communication connection with the feed motor inverter 12 , the mill motor inverter 22 , the classifier motor inverter 32 and the fan motor inverter 62 to control the feed motor inverter 12 , the mill motor inverter 22 , the classifier motor inverter 32 and the fan motor inverter 62 to adjust the frequency.

[0051] In order to determine the content of coarse powder, medium powder and fine powder in the finished particles, the grinding system is also provided with an online particle sizer 8 which is connected to the control system 7. The online particle sizer 8 performs real-time sampling and detection of the finished particles located at the collecting device 4 to obtain the Dx detection value, the D50 detection value and the Dy detection value and compares the Dx detection value, the D50 detection value and the Dy detection value with the preset Dx target value, the D50 target value and the Dy target value, respectively, wherein the Dx detection value reflects the coarse powder content in the finished particles, and the Dy detection value reflects the fine powder content in the finished particles. Specifically, the control system 7 includes a PLC, which is connected to the feed motor inverter 12, the mill motor inverter 22, the classifier motor inverter 32, the fan motor inverter 62 and the online particle sizer 8.

[0052] For example, Dx can be D90, which means that the proportion of particles with a particle size smaller than it is 90%. When the D90 detection value is larger, it reflects that the coarse powder content in the finished particles is higher, and when the D90 detection value is smaller, it reflects that the coarse powder content in the finished particles is lower; Dy can be D10, which means that the proportion of particles with a particle size smaller than it is 10%. When the D10 detection value is larger, it reflects that the fine powder content in the finished particles is lower, and when the D10 detection value is smaller, it reflects that the fine powder content in the finished particles is higher. Depending on the setting of the online particle size analyzer 8, Dx can also be D10, which means that the proportion of particles with a particle size larger than it is 10%, and Dy can also be D90, which means that the proportion of particles with a particle size larger than it is 90%. Of course, the values of Dx and Dy are not limited to this. For example, Dx can be D99, and so on.

[0053] Specifically, the Dx target value, D50 target value, and Dy target value are all range values. For example, the D50 target value can be 10μm ± 1μm, the Dx target value is the D99 target value, which can take a value of 40μm ± 1μm, and the Dy target value is the D10 target value, which can take a value of 5μm ± 1μm.

[0054] When comparing the Dx detection value, D50 detection value, and Dy detection value with the preset Dx target value, D50 target value, and Dy target value respectively,

[0055] If the Dx detection value does not meet the Dx target value, the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the classifier motor frequency converter 32 to adjust the frequency according to this control signal;

[0056] If the D50 detection value does not meet the D50 target value, the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the fan motor frequency converter 62 to adjust the frequency according to this control signal;

[0057] If the Dy detection value does not meet the Dy target value, the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the feeding motor frequency converter 12 to adjust the frequency according to this control signal.

[0058] In a specific example, the frequency of the feeding motor main body 11 can be adjusted between 5HZ - 10HZ, the frequency of the fan motor main body 61 can be adjusted between 35HZ - 50HZ, and the frequency of the classifier motor main body 31 can be adjusted between 20HZ - 35HZ.

[0059] It should be noted that the above control method refers to the control method when only one of the Dx detection value, D50 detection value, and Dy detection value does not meet the corresponding target value. When at least two of them do not meet their respective target values, the above corresponding control adjustments are not necessarily all carried out.

[0060] Specifically, the mill motor frequency converter 22 can adjust the frequency according to the adjustment of the frequency by the feeding motor frequency converter 12, so that the mill motor main body 21 can be matched with the feeding motor main body 11, make full use of the power of the mill 2, and thus be conducive to achieving the maximum production efficiency.

[0061] In this application, the Dx detection value, D50 detection value, and Dy detection value in the finished product particles are detected and compared with the corresponding Dx target value, D50 target value, and Dy target value respectively. When the Dx detection value does not meet the Dx target value, the frequency of the classifier motor frequency converter 32 is controlled to be adjusted. When the D50 detection value does not meet the D50 target value, the frequency of the fan motor frequency converter 62 is controlled to be adjusted. When the Dy detection value does not meet the Dy target value, the frequency of the feeding motor frequency converter 12 is controlled to be adjusted. That is to say, when the content of coarse powder, medium powder, or fine powder in the finished product particles deviates from the set value, this application can adjust the frequency of the classifier motor frequency converter 32, fan motor frequency converter 62, or feeding motor frequency converter 12 to achieve the purpose of adjusting the content of coarse powder, medium powder, and fine powder in the finished product particles, and can realize the targeted adjustment of the content of coarse powder, medium powder, and fine powder in the finished product particles.

[0062] Specifically, if the Dx detection value is greater than the Dx target value (the upper limit of the Dx target value), the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the classifier motor frequency converter 32 to increase the frequency according to this control signal to adjust the Dx detection value to meet the Dx target value;

[0063] If the Dx detection value is less than the Dx target value (the lower limit of the Dx target value), the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the classifier motor frequency converter 32 to decrease the frequency according to this control signal to adjust the Dx detection value to meet the Dx target value;

[0064] If the D50 detection value is less than the D50 target value (the lower limit of the D50 target value), the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the fan motor frequency converter 62 to increase the frequency according to this control signal to adjust the D50 detection value to meet the D50 target value;

[0065] If the D50 detection value is greater than the D50 target value (the upper limit of the D50 target value), the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the fan motor frequency converter 62 to decrease the frequency according to this control signal to adjust the D50 detection value to meet the D50 target value;

[0066] If the Dy detection value is less than the Dy target value (the lower limit of the Dy target value), the online particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the feeding motor frequency converter 12 to decrease the frequency according to this control signal to adjust the Dy detection value to meet the Dy target value;

[0067] If the detected value of Dy is greater than the target value of Dy (the upper limit of the target value of Dy), the on-line particle size analyzer 8 sends a corresponding control signal to the control system 7, and the control system 7 controls the feed motor frequency converter 12 to increase the frequency according to the control signal so as to adjust the detected value of Dy to meet the target value of Dy.

[0068] In some embodiments, after the feed motor frequency converter 12, the fan motor frequency converter 62 or the classifier motor frequency converter 32 adjusts the frequency, at an interval of a set time period (such as 1-5 minutes), the control system 7 controls the on-line particle size analyzer 8 to perform real-time sampling and detection on the finished product particles located at the collection device 4 again to obtain the latest detected values of Dx, D50 and Dy, and determines whether the latest detected values of Dx, D50 and Dy meet the target values of Dx, D50 and Dy respectively. This can timely determine whether the coarse powder, medium powder and fine powder are adjusted to meet the requirements after the corresponding frequency is adjusted.

[0069] In some embodiments, if at least one of the detected value of Dx, the detected value of D50 and the detected value of Dy does not meet their respective corresponding target values, the control system 7 first controls the classifier motor frequency converter 32 to change the frequency so that the detected value of Dx meets the target value of Dx first.

[0070] Specifically, after the classifier motor frequency converter 32 changes the frequency, the detected values of Dx, D50 and Dy can be detected again at an interval of a set time period. If the detected value of Dx has met the target value of Dx, then it is determined whether corresponding adjustments are made according to whether the detected values of D50 and Dy meet the corresponding target values. If the detected value of Dx still does not meet the target value of Dx, the classifier motor frequency converter 32 is continuously controlled to change the frequency until the detected value of Dx meets the target value of Dx, and then it is determined whether corresponding adjustments are made according to whether the detected values of D50 and Dy meet the corresponding target values.

[0071] If the detected value of Dx meets the target value of Dx, and the detected values of D50 and Dy do not meet the target values of D50 and Dy respectively, the control system 7 first controls the fan motor frequency converter 62 to change the frequency so that the detected value of D50 meets the target value of D50 first.

[0072] Specifically, after the frequency of the fan motor frequency converter 62 is changed, the Dx detection value, the D50 detection value, and the Dy detection value can be detected again at an interval of a set duration. If the Dx detection value meets the Dx target value and the D50 detection value also meets the D50 target value, then it is determined whether to perform corresponding adjustment according to whether the Dy detection value meets the Dy target value. If the Dx detection value meets the Dx target value, but the D50 detection value still does not meet the D50 target value, then continue to control the fan motor frequency converter 62 to change the frequency to adjust the D50 detection value. Only when the Dx detection value meets the Dx target value and the D50 detection value also meets the D50 target value, it is determined whether to perform corresponding adjustment according to whether the Dy detection value meets the Dy target value.

[0073] Embodiment 2

[0074] Please refer to Figure 1 , the present application discloses a control method for a grinding system. The grinding system includes a feeding device 1, a grinding mill 2, a classifier 3, a collection device 4, a dust removal device, and a fan 6 connected in sequence. The feeding device 1 includes a feeding motor 10, and the feeding motor 10 includes a feeding motor main body 11 and a feeding motor frequency converter 12. The grinding mill 2 includes a grinding mill motor 20, and the grinding mill motor 20 includes a grinding mill motor main body 21 and a grinding mill motor frequency converter 22. The classifier 3 includes a classifier motor 30, and the classifier motor 30 includes a classifier motor main body 31 and a classifier motor frequency converter 32. The fan 6 includes a fan motor 60, and the fan motor 60 includes a fan motor main body 61 and a fan motor frequency converter 62.

[0075] The control method includes:

[0076] Obtain the Dx detection value, the D50 detection value, and the Dy detection value of the finished product particles and determine whether they respectively meet the preset Dx target value, D50 target value, and Dy target value, where the Dx detection value reflects the content of coarse powder in the finished product particles, and the Dy detection value reflects the content of fine powder in the finished product particles;

[0077] If the Dx detection value does not meet the Dx target value, then control the classifier motor frequency converter 32 to adjust the frequency;

[0078] If the D50 detection value does not meet the D50 target value, then control the fan motor frequency converter 62 to adjust the frequency;

[0079] If the Dy detection value does not meet the Dy target value, then control the feeding motor frequency converter 12 to adjust the frequency.

[0080] In this application, by detecting the Dx detection value, D50 detection value, and Dy detection value in the finished product particles and comparing them with the corresponding Dx target value, D50 target value, and Dy target value respectively, when the Dx detection value does not meet the Dx target value, the frequency of the classifier motor frequency converter 32 is controlled to be adjusted; when the D50 detection value does not meet the D50 target value, the frequency of the fan motor frequency converter 62 is controlled to be adjusted; when the Dy detection value does not meet the Dy target value, the frequency of the feeding motor frequency converter 12 is controlled to be adjusted. That is to say, when the content of coarse powder, medium powder, or fine powder in the finished product particles deviates from the set value, this application can adjust the frequency of the classifier motor frequency converter 32, the fan motor frequency converter 62, or the feeding motor frequency converter 12 to achieve the purpose of adjusting the content of coarse powder, medium powder, and fine powder in the finished product particles, and can realize the targeted adjustment of the content of coarse powder, medium powder, and fine powder in the finished product particles.

[0081] Specifically, if the Dx detection value is greater than the Dx target value, the frequency of the classifier motor frequency converter 32 is controlled to increase;

[0082] If the Dx detection value is less than the Dx target value, the frequency of the classifier motor frequency converter 32 is controlled to decrease;

[0083] If the D50 detection value is less than the D50 target value, the frequency of the fan motor frequency converter 62 is controlled to increase;

[0084] If the D50 detection value is greater than the D50 target value, the frequency of the fan motor frequency converter 62 is controlled to decrease;

[0085] If the Dy detection value is less than the Dy target value, the frequency of the feeding motor frequency converter 12 is controlled to decrease;

[0086] If the Dy detection value is greater than the Dy target value, the frequency of the feeding motor frequency converter 12 is controlled to increase.

[0087] In some embodiments, after the frequency of the feeding motor frequency converter 12, the fan motor frequency converter 62, or the classifier motor frequency converter 32 is adjusted, the latest Dx detection value, D50 detection value, and Dy detection value of the finished product particles are obtained again at an interval of a set duration, and it is determined whether the latest Dx detection value, D50 detection value, and Dy detection value of the finished product particles meet the Dx target value, D50 target value, and Dy target value respectively. This can timely determine whether the coarse powder, medium powder, and fine powder are adjusted to meet the requirements after the corresponding frequency is adjusted.

[0088] In some embodiments, if at least one of the Dx detection value, the D50 detection value, and the Dy detection value does not meet their respective target values, first control the frequency converter of the classifier motor 32 to change the frequency to first make the Dx detection value meet the Dx target value; if the Dx detection value meets the Dx target value, and the D50 detection value and the Dy detection value do not meet the D50 target value and the Dy target value respectively, first control the frequency converter of the fan motor 62 to change the frequency to first make the D50 detection value meet the D50 target value.

[0089] Embodiment III

[0090] Please refer to Figure 3 , the present application discloses an electronic device, including:

[0091] A processor 300;

[0092] A memory 400, in which executable instructions of the processor 300 are stored;

[0093] Wherein, the processor 300 is configured to execute the control method described in Embodiment II by executing the executable instructions.

[0094] Embodiment IV

[0095] The present application discloses a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the control method described in Embodiment II is implemented.

[0096] Embodiment V

[0097] The present application discloses a computer program product or a computer program, the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device executes the control method described in Embodiment II.

[0098] It should be understood that in the embodiments of the present application, the so-called processor may be a central processing module (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0099] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by hardware related to computer program instructions. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0100] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] The foregoing disclosure is only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A grinding system, characterized in that: It includes a feeding device, a mill, a classifier, a collection device, a dust removal device, a fan and a control system connected in sequence. The feeding device includes a feeding motor, and the feeding motor includes a feeding motor main body and a feeding motor frequency converter. The mill includes a mill motor, and the mill motor includes a mill motor main body and a mill motor frequency converter. The classifier includes a classifier motor, and the classifier motor includes a classifier motor main body and a classifier motor frequency converter. The fan includes a fan motor, and the fan motor includes a fan motor main body and a fan motor frequency converter. The control system is communicatively connected to the feeding motor frequency converter, the mill motor frequency converter, the classifier motor frequency converter and the fan motor frequency converter. The powder grinding system further includes an on-line particle size analyzer communicatively connected to the control system. The on-line particle size analyzer performs real-time sampling and detection on the finished particles at the collection device to obtain Dx detection value, D50 detection value and Dy detection value, and compares the Dx detection value, the D50 detection value and the Dy detection value with the preset Dx target value, D50 target value and Dy target value respectively. The Dx detection value reflects the coarse powder content in the finished particles, and the Dy detection value reflects the fine powder content in the finished particles; If the Dx detection value does not meet the Dx target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the classifier motor frequency converter to adjust the frequency according to this control signal; If the D50 detection value does not meet the D50 target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the fan motor frequency converter to adjust the frequency according to this control signal; If the Dy detection value does not meet the Dy target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the feeding motor frequency converter to adjust the frequency according to this control signal; If at least one of the Dx detection value, the D50 detection value and the Dy detection value does not meet their respective corresponding target values, the control system first controls the classifier motor frequency converter to change the frequency to first make the Dx detection value meet the Dx target value; If the Dx detection value meets the Dx target value, and the D50 detection value and the Dy detection value do not meet the D50 target value and the Dy target value respectively, the control system first controls the fan motor frequency converter to change the frequency to first make the D50 detection value meet the D50 target value.

2. The powder grinding system according to claim 1, wherein If the Dx detection value is greater than the Dx target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the classifier motor frequency converter to increase the frequency according to this control signal; If the Dx detection value is less than the Dx target value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the classifier motor frequency converter to decrease the frequency according to this control signal; If the detected D50 value is less than the target D50 value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the fan motor to increase the frequency according to this control signal; If the detected D50 value is greater than the target D50 value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the fan motor to decrease the frequency according to this control signal; If the detected Dy value is less than the target Dy value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to decrease the frequency according to this control signal; If the detected Dy value is greater than the target Dy value, the on-line particle size analyzer sends a corresponding control signal to the control system, and the control system controls the frequency converter of the feeding motor to increase the frequency according to this control signal.

3. The grinding system according to claim 1 or 2, characterized in that After the frequency converter of the feeding motor, the frequency converter of the fan motor or the frequency converter of the classifier motor adjusts the frequency, at an interval of a set time duration, the control system controls the on-line particle size analyzer to take a real-time sample of the finished particles at the collection device again to obtain the latest detected Dx value, the detected D50 value and the detected Dy value, and determines whether the latest detected Dx value, the detected D50 value and the detected Dy value respectively meet the target Dx value, the target D50 value and the target Dy value.

4. A control method for a grinding system, the grinding system includes a feeding device, a grinding mill, a classifier, a collection device, a dust removal device and a fan connected in sequence, wherein the feeding device includes a feeding motor, the feeding motor includes a feeding motor main body and a feeding motor frequency converter, the grinding mill includes a grinding mill motor, the grinding mill motor includes a grinding mill motor main body and a grinding mill motor frequency converter, the classifier includes a classifier motor, the classifier motor includes a classifier motor main body and a classifier motor frequency converter, and the fan includes a fan motor, the fan motor includes a fan motor main body and a fan motor frequency converter; The method includes: Obtaining the detected Dx value, the detected D50 value and the detected Dy value of the finished particles and determining whether they respectively meet the preset target Dx value, the target D50 value and the target Dy value, wherein the detected Dx value reflects the content of coarse powder in the finished particles, and the detected Dy value reflects the content of fine powder in the finished particles; If the detected Dx value does not meet the target Dx value, control the frequency converter of the classifier motor to adjust the frequency; If the detected D50 value does not meet the target D50 value, control the frequency converter of the fan motor to adjust the frequency; If the detected Dy value does not meet the target Dy value, control the frequency converter of the feeding motor to adjust the frequency; If at least one of the detected Dx value, the detected D50 value and the detected Dy value does not meet its corresponding target value, first control the frequency converter of the classifier motor to change the frequency to first make the detected Dx value meet the target Dx value; If the Dx detection value meets the Dx target value, and the D50 detection value and the Dy detection value do not meet the D50 target value and the Dy target value respectively, first control the frequency converter of the fan motor to change the frequency so that the D50 detection value meets the D50 target value first.

5. The control method according to claim 4, characterized in that if the Dx detection value is greater than the Dx target value, control the frequency converter of the classifier motor to increase the frequency; if the Dx detection value is less than the Dx target value, control the frequency converter of the classifier motor to decrease the frequency; if the D50 detection value is less than the D50 target value, control the frequency converter of the fan motor to increase the frequency; if the D50 detection value is greater than the D50 target value, control the frequency converter of the fan motor to decrease the frequency; if the Dy detection value is less than the Dy target value, control the frequency converter of the feeding motor to decrease the frequency; if the Dy detection value is greater than the Dy target value, control the frequency converter of the feeding motor to increase the frequency.

6. The control method according to claim 4 or 5, characterized in that after the frequency of the frequency converter of the feeding motor, the frequency converter of the fan motor or the frequency converter of the classifier motor is adjusted, obtain the Dx detection value, the D50 detection value and the Dy detection value of the latest finished product particles again at an interval of a set time length, and determine whether the Dx detection value, the D50 detection value and the Dy detection value of the latest finished product particles meet the Dx target value, the D50 target value and the Dy target value respectively.

7. An electronic device, characterized in that, Comprising: a processor; a memory, in which executable instructions of the processor are stored; wherein, the processor is configured to execute the control method according to any one of claims 4 to 6 by executing the executable instructions.

8. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, the control method according to any one of claims 4 to 6 is implemented.

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