Automatic control method, device and equipment for feeding amount of mill and storage medium

Abstract

The embodiment of the invention provides an automatic control method and device for the feeding amount of a mill, equipment and a storage medium, and relates to the field of mineral separation control, current signals of the mill and frequency signals and feedback signals of all blanking machines are obtained, the material conveying time of all the blanking machines is calculated, the target feeding amount of the blanking machines is adjusted according to the current signals of the mill, and the target feeding amount of the blanking machines is adjusted according to the target feeding amount. The initial frequency of the blanking machines is adjusted to be the target frequency according to the target feeding amount, the material conveying feedback time of all the blanking machines is calculated according to the blanking feedback time and the material conveying time of all the blanking machines, the feeding difference value of all the blanking machines is calculated after the material conveying feedback time is waited, whether the feeding difference value is smaller than a preset difference value threshold value or not is judged, and if yes, the target frequency is adjusted. The blanking stability and accuracy of the blanking machine can be ensured without a belt weigher, the input cost is reduced, the feeding amount and the frequency are accurately controlled by setting different feeding amount adjusting step lengths and frequency adjusting step lengths, and the accuracy of the control process is improved by calculating the material conveying feedback time.

Description

Technical Field

[0001] The present invention relates to the field of mineral processing control technology, and in particular to an automatic control method, device, equipment and storage medium for mill feed rate. Background Art

[0002] In the metallurgical industry, since the particle size and grade of the iron ore raw materials mined or purchased are poor, the iron ore raw materials need to be ground first in the production and processing of pellets to obtain iron concentrate that meets the requirements of pellet production. In the grinding process, since the ore is crushed, the effective mineral components can be separated from the gangue, and different effective mineral components can be separated from each other. Grinding operation is a key process for providing selected raw materials. The control of the grinding process will directly affect whether the grinding product can reach the appropriate particle size, and then affect the selection process and the quality of the selected products. The feed rate of the mill and the amount of steel balls in the mill are important factors affecting the load of the mill. The feed rate of the mill is usually controlled according to the load of the mill.

[0003] In the prior art iron ore grinding process, in order to save costs, some factories only equip each discharge port with a vibrating feeder instead of a batching scale. A metering scale is installed on the mixing belt of the discharge port to measure the total feeding amount of the discharge port. When each discharge port is not equipped with a batching scale, it is necessary to manually modify the frequency of the vibrating feeder of each discharge port to control the feeding amount during discharge. Manually adjusting the feeding amount not only has poor stability, but also low accuracy, resulting in unstable feeding amount, which seriously affects the working efficiency of the grinding, especially when the material pile is replaced and the discharge port is switched, and fluctuations occur, which will affect the filling rate and grinding concentration of the entire mill and reduce the grinding classification effect. Therefore, there is an urgent need for a method that can accurately and stably control the feeding amount of the mill when the discharge ports are not equipped with batching scales. Summary of the invention

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method, device, electronic device and readable storage medium for automatically controlling the feed amount of a mill.

[0005] The present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present disclosure provides a method for automatically controlling a feed amount of a mill, the method comprising:

[0007] Obtain the current signal of the grinding mill, the frequency signal and feedback signal of each feeder;

[0008] Calculate the material transportation time of each unloading machine;

[0009] According to the current signal of the grinding mill, the initial feeding amount of each feeder is adjusted to the target feeding amount;

[0010] Determine a first feeder and a second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to target frequencies respectively according to the target feeding amount of each feeder;

[0011] Determine the material unloading feedback time according to the feedback signal of each material unloading machine, and calculate the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine;

[0012] After waiting for the material transport feedback time, calculate the feeding difference between the initial feeding amount of each feeder and the target feeding amount of each feeder, and determine whether the feeding difference is less than a preset difference threshold;

[0013] If the feed difference is less than the preset difference threshold, return to the step of adjusting the initial feed amount of each feeder to the target feed amount according to the current signal of the grinding mill;

[0014] If the feeding difference is greater than the preset difference threshold, return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder.

[0015] According to a specific implementation method disclosed in the present application, the step of calculating the material transportation time of each unloading machine includes:

[0016] Obtaining the length from the unloading position of each unloading machine to the end of the mixed belt and the length of each conveying belt, as well as the first running speed of the mixed belt and the second running speed of the conveying belt;

[0017] Calculate the first transmission time of each feeder according to the length from the feeder unloading position of each feeder to the end of the mixed belt and the first running speed, and calculate the second transmission time of each feeder according to the length of each conveyor belt and the second running speed;

[0018] The material transporting time of each unloading machine is calculated according to the first transmission time and the second transmission time.

[0019] According to a specific embodiment disclosed in the present application, before the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill, the method further includes:

[0020] Determining whether the control model quality code meets the first preset condition;

[0021] If the control model quality code is the first preset condition, the initial feed amount of each feeder is adjusted to the target feed amount according to the current signal of the grinding mill;

[0022] If the control model quality code does not meet the first preset condition, the process returns to the step of determining whether the control model quality code meets the first preset condition.

[0023] According to a specific embodiment disclosed in the present application, the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill includes:

[0024] averaging the current signal of the mill in minutes within a preset time range to obtain an average current of the mill;

[0025] The initial feed amount of each feeder is adjusted to a target feed amount according to the average current, rated current, first theoretical current and second theoretical current of the mill.

[0026] According to a specific embodiment disclosed in the present application, the step of adjusting the initial feed amount of each feeder to the target feed amount according to the average current, rated current, first theoretical current and second theoretical current of the mill includes:

[0027] If the average current is less than the first theoretical current, the initial feeding amount of each feeding machine is increased by a first preset feeding step length;

[0028] If the average current is greater than the first theoretical current and less than the rated current, the initial feeding amount of each feeding machine is increased by a second preset feeding step length;

[0029] If the average current is greater than the rated current and less than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a second preset feeding step length;

[0030] If the average current is greater than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a first preset feeding step length.

[0031] According to a specific implementation method disclosed in the present application, the step of determining the first feeder and the second feeder according to the frequency signals of the feeders includes:

[0032] According to the frequency signals of the blanking machines, the blanking machine with the lowest real-time frequency is determined as the first blanking machine, and the blanking machine with the highest real-time frequency is determined as the second blanking machine.

[0033] According to a specific embodiment disclosed in the present application, the step of adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder includes:

[0034] Increasing the frequency of the first feeder according to a first preset frequency step;

[0035] The frequency of the second feeder is reduced according to a second preset frequency step.

[0036] In a second aspect, an automatic control device for mill feed amount is provided in an embodiment of the present disclosure, the device comprising:

[0037] An acquisition module is used to acquire the current signal of the grinding mill, the frequency signal and feedback signal of each feeder;

[0038] The first calculation module is used to calculate the material transportation time of each unloading machine;

[0039] A first adjustment module, used for adjusting the initial feeding amount of each feeder to a target feeding amount according to the current signal of the grinding mill;

[0040] A second adjustment module is used to determine the first feeder and the second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to target frequencies according to the target feeding amount of each feeder;

[0041] A second calculation module is used to determine the material unloading feedback time according to the feedback signal of each material unloading machine, and calculate the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine;

[0042] A judgment module, used for calculating the feeding difference between the initial feeding amount of each feeder and the target feeding amount of each feeder after waiting for the material transport feedback time, and judging whether the feeding difference is less than a preset difference threshold;

[0043] A first return module, configured to return to the step of adjusting the initial feed amount of each feeder to a target feed amount according to the current signal of the mill if the feed difference is less than the preset difference threshold;

[0044] The second return module is used to return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder if the feeding difference is greater than the preset difference threshold, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder.

[0045] In a third aspect, an electronic device is provided in an embodiment of the present disclosure, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the steps of the method for automatic control of mill feed amount described in any one of the first aspects when executing the computer program.

[0046] In a fourth aspect, a computer-readable storage medium is provided in an embodiment of the present disclosure, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for automatically controlling the feed amount of a mill described in any one of the first aspects are implemented.

[0047] The automatic control method of the feed amount of the mill provided by the present application obtains the current signal of the mill, the frequency signal and feedback signal of each feeder, calculates the transportation time of each feeder, adjusts the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill, determines the first feeder and the second feeder according to the frequency signal of each feeder, adjusts the initial frequency of the first feeder and the second feeder to the target frequency according to the target feeding amount of each feeder, determines the feed feedback time according to the feedback signal of each feeder, calculates the transportation feedback time of each feeder according to the feed feedback time and the transportation time of each feeder, and calculates the initial feeding amount of each feeder after waiting for the transportation feedback time. and the feeding difference of the target feeding amount of each feeder, determine whether the feeding difference is less than a preset difference threshold value, if the feeding difference is less than the preset difference threshold value, return to the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinder, if the feeding difference is greater than the preset difference threshold value, return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder, in the absence of a belt scale, the feeding stability and accuracy of the feeder can be guaranteed, the control cost is reduced, and the accuracy of the control process is improved by calculating the material transportation feedback time.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In each of the drawings, similar components are numbered similarly.

[0050] Figure 1 A schematic flow chart of an automatic control method for mill feed amount provided in an embodiment of the present application is shown;

[0051] Figure 2 A schematic diagram of a grinding feeding system provided in an embodiment of the present application is shown;

[0052] Figure 3 A schematic diagram of a control model quality code determination process provided by an embodiment of the present application is shown;

[0053] Figure 4 A schematic diagram of the structure of an automatic control device for mill feed amount provided in an embodiment of the present application is shown;

[0054] Figure 5 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0056] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0060] Example 1

[0061] In the actual working conditions of mineral processing, the raw material bin is unloaded onto the mixing belt through a disc unloader or an electronic belt scale. A metering scale is installed at the junction of the mixing belt and the conveyor belt. In order to save costs, all the unloaders above are not equipped with unloading scales, which makes it difficult to accurately control the unloading amount of the unloader, reducing the working efficiency of the mill.

[0062] like Figure 1 , which is a flow chart of an automatic control method for mill feed amount provided in an embodiment of the present application, and the automatic control method for mill feed amount provided in an embodiment of the present application comprises the following steps:

[0063] Step S101, obtaining the current signal of the grinding mill, the frequency signal and feedback signal of each feeder.

[0064] Specifically, the current change of the mill can fully reflect the load of the mill. When the feed rate of the mill is increased, the load of the mill will increase accordingly. On the contrary, when the feed rate of the mill is reduced, the load of the mill will also decrease accordingly. The frequency signal of each feeder can directly reflect the working frequency of each feeder, and the feedback signal can reflect the feeding situation of each feeder, such as the feeding time and the time required to feed to the mixing belt.

[0065] Step S102, calculating the material transport time of each unloading machine.

[0066] Specifically, see Figure 2 , Figure 2 A schematic diagram of a grinding feeding system provided in an embodiment of the present application. Feeders 1, 2 and 3 are located at different positions on the mixing belt, so the material transportation time required from each feeder to the mill is different and needs to be calculated separately. However, the material transportation time required for each conveyor belt under the feeder is the same, so it is only necessary to calculate the sum of the material transportation time of all conveyor belts.

[0067] In specific implementation, the step of calculating the material transportation time of each unloading machine includes:

[0068] Obtaining the length from the unloading position of each unloading machine to the end of the mixed belt and the length of each conveying belt, as well as the first running speed of the mixed belt and the second running speed of the conveying belt;

[0069] Calculate the first transmission time of each feeder according to the length from the feeder unloading position of each feeder to the end of the mixed belt and the first running speed, and calculate the second transmission time of each feeder according to the length of each conveyor belt and the second running speed;

[0070] The material transporting time of each unloading machine is calculated according to the first transmission time and the second transmission time.

[0071] Preferably, the length from the unloading position of the unloading machine 1 to the end of the mixing belt is L p1 , the length from the unloading position of unloading machine 2 to the end of the mixed belt is L p2 , the length from the unloading position of unloading machine 3 to the end of the mixed belt is L p3 , the length of conveyor belt 1 is L s1 , the length of the Nth conveyor belt n is L sn , the first running speed of the hybrid belt is V h , the second running speed of each conveyor belt is V sn , calculate the material transportation time of each feeder from the feeder position to the mill as T p1 、T p2 …T pn , T pn =L pn / V h +Σ(L sn / V sn ).

[0072] Step S103, adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinding mill.

[0073] Specifically, see Figure 3, Figure 3 A schematic diagram of a control model quality code judgment process provided in an embodiment of the present application. Before the step of adjusting the initial feed amount of each feeder to the target feed amount according to the current signal of the mill, it also includes:

[0074] Step S1031, determining whether the control model quality code meets the first preset condition.

[0075] Step S1032: if the control model quality code is the first preset condition, the initial feed amount of each feeder is adjusted to the target feed amount according to the current signal of the grinding mill.

[0076] Step S1033: if the control model quality code does not meet the first preset condition, return to the step of determining whether the control model quality code meets the first preset condition.

[0077] It can be understood that the control model quality code is used to ensure whether the control model meets the quality standards at this time, and can ensure production stability. The first preset condition is True. If it is the first preset condition, control can continue. If it is not the first preset condition, it will automatically switch back to manual control or return to the previous step to re-judge until it meets the first preset condition.

[0078] The step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinding mill comprises:

[0079] averaging the current signal of the mill in minutes within a preset time range to obtain an average current of the mill;

[0080] The initial feed amount of each feeder is adjusted to a target feed amount according to the average current, rated current, first theoretical current and second theoretical current of the mill.

[0081] Preferably, the preset time range includes 10 minutes. By performing minute-level averaging on the mill current signal, an average current value per minute is obtained. The average current value within a time period is obtained by averaging the minute average of the mill current within 10 minutes. By performing interval range judgment on the average current value, the mill can be ensured to be in a normal operating range. The rated current of the mill is the maximum current value allowed for long-term continuous operation under rated conditions. In the actual operation of the motor, due to the existence of efficiency loss and the power factor is not completely 1, it is necessary to consider that the current will be less than the theoretical calculated value. Therefore, the judgment with the theoretical current is added to adjust the feeder, thereby improving the control accuracy of the feed. The first theoretical current of the mill is the theoretical current obtained after considering the efficiency and power factor of the motor in actual application. Preferably, the first theoretical current is 0.8 times the rated current. The second theoretical current of the mill is the short-term working current allowed by the motor, which means that under certain specific working conditions, the motor can withstand a current higher than its rated current in a short period of time without causing damage to the motor. Preferably, the second theoretical current is 1.2 times the rated current.

[0082] The step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the average current, rated current, first theoretical current and second theoretical current of the mill comprises:

[0083] If the average current is less than the first theoretical current, the initial feeding amount of each feeding machine is increased by a first preset feeding step length;

[0084] If the average current is greater than the first theoretical current and less than the rated current, the initial feeding amount of each feeding machine is increased by a second preset feeding step length;

[0085] If the average current is greater than the rated current and less than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a second preset feeding step length;

[0086] If the average current is greater than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a first preset feeding step length.

[0087] Specifically, the first preset feeding step is a 1-step step, the second preset feeding step is a 2-step step, and the first preset feeding step is smaller than the second preset feeding step. By distinguishing the first preset feeding step from the second preset feeding step, the feeding amount can be controlled more accurately and flexibly, ensuring the stability and efficiency of the control process.

[0088] Step S104, determining a first feeder and a second feeder according to the frequency signals of each feeder, and adjusting the initial frequencies of the first feeder and the second feeder to target frequencies according to the target feeding amounts of each feeder.

[0089] The step of determining the first feeder and the second feeder according to the frequency signals of the feeders comprises:

[0090] According to the frequency signals of the blanking machines, the blanking machine with the lowest real-time frequency is determined as the first blanking machine, and the blanking machine with the highest real-time frequency is determined as the second blanking machine.

[0091] The step of adjusting the initial frequencies of the first feeder and the second feeder to target frequencies according to the target feeding amount of each feeder comprises:

[0092] Increasing the frequency of the first feeder according to a first preset frequency step;

[0093] The frequency of the second feeder is reduced according to a second preset frequency step.

[0094] It can be understood that increasing the frequency of the feeder with the lowest real-time frequency and reducing the frequency of the feeder with the highest real-time frequency can effectively control the load of the mill. By presetting different frequency steps, the frequency of each feeder can be accurately controlled.

[0095] Step S105, determining the material unloading feedback time according to the feedback signal of each material unloading machine, and calculating the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine.

[0096] Specifically, the material unloading feedback time is the time required for the material unloading machine to ensure that the adjusted material has entered the grinder and generated feedback after the frequency-adjusted material unloading feedback time is supplied. The material transportation feedback time of each unloading machine can be calculated separately by summing the material unloading feedback time and the material transportation time of each unloading machine.

[0097] Step S106, after waiting for the material transport feedback time, calculate the feeding difference between the initial feeding amount of each material unloading machine and the target feeding amount of each material unloading machine, and determine whether the feeding difference is less than a preset difference threshold.

[0098] Specifically, by judging whether the feeding difference is less than a preset difference threshold, the feeding amount and frequency of each feeder can be successfully adjusted during the control process, and the feeding amount and frequency of each feeder can be accurately adjusted during the control process through a loop step.

[0099] Step S107, if the feed difference is less than the preset difference threshold, return to the step of adjusting the initial feed amount of each feeder to the target feed amount according to the current signal of the grinding mill.

[0100] Step S108, if the feeding difference is greater than the preset difference threshold, return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amounts of each feeder.

[0101] The automatic control method of the mill feed amount provided in the embodiment of the present application obtains the current signal of the mill, the frequency signal and feedback signal of each feeder, calculates the transportation time of each feeder, adjusts the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill, determines the first feeder and the second feeder according to the frequency signal of each feeder, adjusts the initial frequency of the first feeder and the second feeder to the target frequency according to the target feeding amount of each feeder, determines the feeding feedback time according to the feedback signal of each feeder, calculates the transportation feedback time of each feeder according to the feeding feedback time and the transportation time of each feeder, and calculates the initial feeding amount of each feeder and the feeding time of the target feeding amount of each feeder after waiting for the transportation feedback time. Difference, judge whether the feeding difference is less than a preset difference threshold value, if the feeding difference is less than the preset difference threshold value, return to the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinder, if the feeding difference is greater than the preset difference threshold value, return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder, in the absence of a belt scale, the feeding stability and accuracy of the feeder can be guaranteed, the control cost is reduced, the feeding amount and frequency can be accurately controlled by setting different feeding amount adjustment steps and frequency adjustment steps, and the accuracy of the control process is improved by calculating the material transportation feedback time.

[0102] Example 2

[0103] like Figure 4 FIG. 4 is a schematic diagram of a structure of an automatic control device 400 for a mill feed amount provided in an embodiment of the present application, wherein the device comprises:

[0104] An acquisition module 401 is used to acquire the current signal of the grinding mill, the frequency signal and feedback signal of each feeder;

[0105] The first calculation module 402 is used to calculate the material transportation time of each unloading machine;

[0106] A first adjustment module 403, used to adjust the initial feeding amount of each feeder to a target feeding amount according to the current signal of the grinding mill;

[0107] The second adjustment module 404 is used to determine the first feeder and the second feeder according to the frequency signals of the feeders, and adjust the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of the feeders;

[0108] The second calculation module 305 is used to determine the material unloading feedback time according to the feedback signal of each material unloading machine, and calculate the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine;

[0109] A judgment module 406 is used to calculate the feeding difference between the initial feeding amount of each feeder and the target feeding amount of each feeder after waiting for the material transport feedback time, and judge whether the feeding difference is less than a preset difference threshold;

[0110] A first return module 407, for returning to the step of adjusting the initial feed amount of each feeder to a target feed amount according to the current signal of the grinding mill if the feed difference is less than the preset difference threshold;

[0111] The second return module 408 is used to return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder if the feeding difference is greater than the preset difference threshold, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder.

[0112] The automatic control device 400 for the mill feed rate provided in this embodiment can implement the automatic control method for the mill feed rate shown in Embodiment 1, and will not be described again here to avoid repetition.

[0113] The automatic control device for mill feeding amount provided in the embodiment of the present application obtains the current signal of the mill, the frequency signal and feedback signal of each feeder, calculates the feeding time of each feeder, adjusts the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill, determines the first feeder and the second feeder according to the frequency signal of each feeder, adjusts the initial frequency of the first feeder and the second feeder to the target frequency according to the target feeding amount of each feeder, determines the feeding feedback time according to the feedback signal of each feeder, calculates the feeding feedback time of each feeder according to the feeding feedback time and the feeding time of each feeder, and calculates the initial feeding amount of each feeder after waiting for the feeding feedback time. and the feeding difference of the target feeding amount of each feeder, determine whether the feeding difference is less than a preset difference threshold value, if the feeding difference is less than the preset difference threshold value, return to the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinder, if the feeding difference is greater than the preset difference threshold value, return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder, in the absence of a belt scale, the feeding stability and accuracy of the feeder can be guaranteed, the control cost is reduced, and the accuracy of the control process is improved by calculating the material transportation feedback time.

[0114] Example 3

[0115] In addition, an embodiment of the present disclosure provides an electronic device 500, including a memory and a processor, wherein the memory stores a computer program.

[0116] For details, see Figure 5 The electronic device 500 includes: a receiver 501, a bus interface and a processor 502.

[0117] In the embodiment of the present invention, the electronic device 500 further includes a memory 503. Figure 5 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 502 and memory represented by memory 503. The bus architecture may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The receiver 501 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 502 is responsible for managing the bus architecture and general processing, and the memory 503 may store data used by the processor 502 when performing operations.

[0118] The electronic device 500 provided in the embodiment of the present invention can implement the automatic control method of the mill feed amount shown in Example 1, which will not be described again here to avoid repetition.

[0119] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow chart, and the combination of boxes in the structure diagram and / or the flow chart, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0120] In addition, the functional modules or units in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0121] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0122] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for automatically controlling the feed amount of a mill, characterized in that: The method comprises: Obtain the current signal of the grinding mill, the frequency signal and feedback signal of each feeder; Calculate the material transportation time of each unloading machine; According to the current signal of the grinding mill, the initial feeding amount of each feeder is adjusted to the target feeding amount; Determine a first feeder and a second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to target frequencies respectively according to the target feeding amount of each feeder; Determine the material unloading feedback time according to the feedback signal of each material unloading machine, and calculate the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine; After waiting for the material transport feedback time, calculate the feeding difference between the initial feeding amount of each feeder and the target feeding amount of each feeder, and determine whether the feeding difference is less than a preset difference threshold; If the feed difference is less than the preset difference threshold, return to the step of adjusting the initial feed amount of each feeder to the target feed amount according to the current signal of the grinding mill; If the feeding difference is greater than the preset difference threshold, the process returns to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amounts of each feeder.

2. The automatic control method of mill feed amount according to claim 1, characterized in that: The step of calculating the material transport time of each unloading machine includes: Obtaining the length from the unloading position of each unloading machine to the end of the mixed belt and the length of each conveying belt, as well as the first running speed of the mixed belt and the second running speed of the conveying belt; Calculate the first transmission time of each feeder according to the length from the feeder unloading position of each feeder to the end of the mixed belt and the first running speed, and calculate the second transmission time of each feeder according to the length of each conveyor belt and the second running speed; The material transporting time of each unloading machine is calculated according to the first transmission time and the second transmission time.

3. The automatic control method of mill feed amount according to claim 1, characterized in that: Before the step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the grinding mill, the method further includes: Determining whether the control model quality code meets the first preset condition; If the control model quality code is the first preset condition, the initial feed amount of each feeder is adjusted to the target feed amount according to the current signal of the grinding mill; If the control model quality code does not meet the first preset condition, the process returns to the step of determining whether the control model quality code meets the first preset condition.

4. The automatic control method of mill feed amount according to claim 1, characterized in that: The step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the current signal of the mill comprises: averaging the current signal of the mill in minutes within a preset time range to obtain an average current of the mill; The initial feed amount of each feeder is adjusted to a target feed amount according to the average current, rated current, first theoretical current and second theoretical current of the mill.

5. The automatic control method of mill feed amount according to claim 4, characterized in that: The step of adjusting the initial feeding amount of each feeder to the target feeding amount according to the average current, rated current, first theoretical current and second theoretical current of the mill comprises: If the average current is less than the first theoretical current, the initial feeding amount of each feeding machine is increased by a first preset feeding step length; If the average current is greater than the first theoretical current and less than the rated current, the initial feeding amount of each feeding machine is increased by a second preset feeding step length; If the average current is greater than the rated current and less than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a second preset feeding step length; If the average current is greater than the second theoretical current, the initial feeding amount of each feeding machine is reduced by a first preset feeding step length.

6. The automatic control method of mill feed amount according to claim 1, characterized in that: The step of determining the first feeder and the second feeder according to the frequency signals of the feeders comprises: According to the frequency signals of the blanking machines, the blanking machine with the lowest real-time frequency is determined as the first blanking machine, and the blanking machine with the highest real-time frequency is determined as the second blanking machine.

7. The automatic control method of mill feed amount according to claim 1, characterized in that: The step of adjusting the initial frequencies of the first feeder and the second feeder to target frequencies according to the target feeding amount of each feeder comprises: Increasing the frequency of the first feeder according to a first preset frequency step; The frequency of the second feeder is reduced according to a second preset frequency step.

8. An automatic control device for mill feed rate, characterized in that: The device comprises: An acquisition module is used to acquire the current signal of the grinding mill, the frequency signal and feedback signal of each feeder; The first calculation module is used to calculate the material transportation time of each unloading machine; A first adjustment module, used for adjusting the initial feeding amount of each feeder to a target feeding amount according to the current signal of the grinding mill; A second adjustment module is used to determine the first feeder and the second feeder according to the frequency signals of each feeder, and adjust the initial frequencies of the first feeder and the second feeder to target frequencies according to the target feeding amount of each feeder; A second calculation module is used to determine the material unloading feedback time according to the feedback signal of each material unloading machine, and calculate the material transportation feedback time of each material unloading machine according to the material unloading feedback time and the material transportation time of each material unloading machine; A judgment module, used for calculating the feeding difference between the initial feeding amount of each feeder and the target feeding amount of each feeder after waiting for the material transport feedback time, and judging whether the feeding difference is less than a preset difference threshold; A first return module, configured to return to the step of adjusting the initial feed amount of each feeder to a target feed amount according to the current signal of the mill if the feed difference is less than the preset difference threshold; The second return module is used to return to the step of determining the first feeder and the second feeder according to the frequency signals of each feeder if the feeding difference is greater than the preset difference threshold, and adjusting the initial frequencies of the first feeder and the second feeder to the target frequencies according to the target feeding amount of each feeder.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for automatically controlling the feed amount of a mill according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for automatically controlling the feed amount of a mill according to any one of claims 1 to 7 are implemented.

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