An automatic unblocking device, method and electronic equipment for a coal conveying and screening system

Abstract

The application relates to an automatic blockage cleaning device, method and electronic equipment for a coal conveying and screening system, wherein the automatic blockage cleaning device comprises a control system and an execution device for dredging screen holes; the control system comprises a monitoring unit, a processing unit and an output unit; the monitoring unit is used for acquiring screen underflow material information of the coal conveying and screening system in real time, the screen underflow material information being material yield meeting screening conditions; the processing unit is used for calculating average yield within a preset time according to the screen underflow material information; and the output unit is used for outputting a first control signal according to the average yield, the first control signal being used for controlling running or closing of the execution device. The application has the effect of realizing mechanicalization and automatic blockage cleaning of the coal conveying and screening system, and avoids various problems generated in the process of manually cleaning blockage.

Description

An automatic unblocking device, method, and electronic equipment for a coal conveying and screening system. Technical Field

[0001] This application relates to the technical field of coal conveying and screening, and in particular to an automatic unblocking device, method and electronic equipment for a coal conveying and screening system. Background Technology

[0002] In coal-fired power plants, the coal conveying and screening system is a crucial auxiliary equipment. Its main function is to screen and crush raw coal to meet the combustion requirements of the boiler. During the screening process, screening removes materials that have reached the required particle size, preventing over-crushing by the crusher, thereby improving crushing efficiency and reducing energy consumption. Undersize material is typically used as the final product, while oversize material may be returned to the crusher for further processing. Vibrating screens can control and ensure that the product particle size meets specified standards. Precise screening reduces over-crushing and unnecessary material recycling, thus lowering production costs.

[0003] However, in actual operation, the coal conveying and screening system frequently experiences blockages due to impurities and moisture variations in the raw coal. When the vibrating screen plates become clogged, all the fuel enters the crusher for further processing, resulting in an unreasonable particle size distribution of the coal entering the furnace, with a higher proportion of fine particles. This affects the stability of boiler combustion, increases the carbon content of fly ash, reduces circulating material, and impacts boiler efficiency. Furthermore, the crusher is prone to coal sticking due to excessive coal input, causing an increase in its operating current and severely affecting the stable operation of the system.

[0004] Currently, the common method for addressing blockages in coal conveying and screening systems is to manually remove the clogged coal using tools such as long chisels or by flushing with high-pressure water hoses and blowing with compressed air. Manual cleaning is labor-intensive, inefficient, and poses safety hazards; moreover, shutting down the coal conveying and screening system can disrupt the normal operation of the power plant. Summary of the Invention

[0005] In order to achieve mechanized and automated unblocking of coal conveying and screening systems and avoid various problems caused by manual unblocking, this application provides an automatic unblocking device, method and electronic equipment for coal conveying and screening systems.

[0006] In the first aspect, this application provides an automatic unblocking device for a coal conveying and screening system, which adopts the following technical solution:

[0007] An automatic unblocking device for a coal conveying and screening system includes a control system and an actuator for unblocking screen holes; the control system includes:

[0008] The monitoring unit is used to acquire the undersize material information of the coal conveying and crushing system in real time, wherein the undersize material information is the output of material that meets the screening conditions;

[0009] The processing unit is used to calculate the average output within a preset time based on the information of the undersized material;

[0010] The output unit is configured to output a first control signal based on the average output, the first control signal being used to control the operation or shutdown of the actuator.

[0011] When a vibrating screen becomes clogged during screening, it directly affects the output of undersize material, with more severe clogging resulting in lower output. By employing the aforementioned technical solution, a suitable monitoring method is selected based on factors such as material properties, the type of screening system, required precision, and budget to monitor the material output that meets screening conditions. A preset time for calculating the average output is set, serving as a reference standard for measuring the degree of screen clogging. When the average output decreases to a predefined level, the output unit automatically outputs a first control signal to drive the actuator. The actuator can be a physical striking mechanism that vibrates the screen plate to eliminate clogging, or a high-pressure water / air jet mechanism that impacts and blows the screen plate to eliminate clogging. When the average output recovers to above the predefined level, the first control signal stops the actuator. This achieves mechanized and automated unclogging of the coal conveying screening system, avoiding various problems arising from manual unclogging.

[0012] Optionally: the actuator is equipped with a preset operating power; the output unit is used for:

[0013] When the average output is less than a preset value, if the previous average output was greater than or equal to the preset value, then the first control signal is an activation signal, which is used to control the actuator to operate at the preset operating power; if the previous average output was less than the preset value, then the first control signal is an amplification signal, which is used to increase the operating power of the actuator.

[0014] When the average output is greater than or equal to the preset value, the first control signal is a shutdown signal, which is used to control the shutdown of the actuator.

[0015] By adopting the above technical solution, if the unblocking effect of the actuator is not ideal, and the continuously calculated average output is lower than the preset value, the output unit outputs an amplifying signal to successively increase the working power of the actuator, enhance the unblocking intensity, and reduce the time to eliminate the impact of blockage, so as to avoid interfering with the normal operation of the coal conveying and screening system. This further improves the mechanized and automated unblocking function of the coal conveying and screening system.

[0016] Optionally, the output unit is further configured to set the preset operating power according to the amplification signal.

[0017] By adopting the above technical solution, the amplification signal directly modifies the preset operating power of the actuator to adapt to the coal conveying and screening system and the particle size characteristics of the material. When the average output is less than the preset value in the next cycle, the activation signal will control the actuator to operate at the reset preset operating power, avoiding the need for multiple amplifications to clear blockages each time the initial preset operating power is too low, thus further reducing the time required to clear blockages.

[0018] Optionally: The monitoring unit is also used to acquire the first operating current in real time, wherein the first operating current is the current value of the vibrating screen in the coal conveying and crushing system;

[0019] The processing unit is also used to record the target power and target current within the same unblocking cycle, and generate a power-current curve based on the target power and target current within multiple unblocking cycles; wherein, the unblocking cycle is the time between any of the opening signals and the next closing signals, the target power is the maximum value of the operating power of the actuator within the unblocking cycle, and the target current is the maximum value of the first operating current within the unblocking cycle;

[0020] The output unit is also used to set the preset operating power according to the first operating current and the power-current curve.

[0021] Because the operating current of a vibrating screen varies with the weight of the material inside, the current value can be used to measure the amount of material within the screen. By employing the above technical solution, the time between an on signal and the next off signal in the unblocking history of the actuator is considered an unblocking cycle. The target power and target current within each unblocking cycle are extracted, and a power-current curve is fitted. When the average output is less than the preset value, the preset operating power of the actuator is modified based on the real-time acquired first operating current and the power-current curve. This allows the actuator to match the current degree of clogging in the vibrating screen with appropriate power, eliminating the impact of clogging as quickly as possible. Furthermore, the power-current curve is continuously improved with increasing data support, ensuring the effectiveness of the anti-clogging measures and achieving intelligent unblocking of the coal conveying and screening system.

[0022] Optionally, the monitoring unit is further configured to stop acquiring the undersize material information when the first operating current is less than the first preset current value.

[0023] By adopting the above technical solution and setting an appropriate first preset current value, when the first working current obtained by the monitoring unit is less than the first preset current value, it is determined that the feed amount at the feed end of the vibrating screen is very small or no new material enters and there is no need to clear the screen holes. At this time, the average output calculated based on the under-screen material information will inevitably drop significantly and has no reference value. Therefore, the under-screen material information is no longer obtained in real time to avoid erroneously outputting the first control signal to drive the execution device to operate.

[0024] Optionally, the monitoring unit is also used to acquire a second operating current in real time, the second operating current being the current value of the crusher in the coal conveying and screening system;

[0025] The output unit is also used to output a second control signal when the second operating current is greater than the second preset current value. The second control signal is used to control the vibrating screen to reduce the screen surface inclination angle.

[0026] Because the operating current of the crusher varies with the feed rate, the current value of the crusher can be used to measure the amount of feed. By adopting the above technical solution and setting an appropriate second preset current value, when the second operating current obtained by the monitoring unit is greater than the second preset current value, it is determined that the feed rate at the feed end of the crusher is too large. At this time, the output unit outputs a second control signal to drive the screen tilt angle adjustment mechanism of the vibrating screen to reduce the screen tilt angle and lower the feeding speed, thereby reducing the load on the crusher.

[0027] Secondly, this application provides an automatic unblocking method for a coal conveying and screening system, employing the following technical solution:

[0028] An automatic unblocking method for a coal conveying and screening system, wherein the coal conveying and screening system is equipped with an actuator for unblocking screen holes; the automatic unblocking method specifically includes the following steps:

[0029] The undersize material information of the coal conveying and crushing system is acquired in real time, and the undersize material information is the output of material that meets the screening conditions;

[0030] Calculate the average output within a preset time period based on the information of the undersized material;

[0031] A first control signal is output based on the average output, and the first control signal is used to control the operation or shutdown of the actuator.

[0032] Optionally: the actuator is equipped with a preset operating power; the step of outputting the first control signal based on the average output specifically includes the following steps:

[0033] When the average output is less than a preset value, if the previous average output was greater than or equal to the preset value, then the first control signal is an activation signal, which is used to control the actuator to start at the preset operating power; if the previous average output was less than the preset value, then the first control signal is an amplification signal, which is used to increase the operating power of the actuator.

[0034] When the average output is greater than or equal to the preset value, the first control signal is a shutdown signal, which is used to control the shutdown of the actuator.

[0035] Thirdly, this application provides an electronic device that adopts the following technical solution:

[0036] An electronic device, comprising:

[0037] At least one processor;

[0038] Memory; at least one application, wherein the at least one application is stored in memory and configured to be executed by at least one processor, the at least one application being configured to: execute the above-described automatic unblocking method for a coal conveying and screening system.

[0039] Fourthly, this application provides a computer-readable storage medium, which adopts the following technical solution:

[0040] A computer-readable storage medium storing at least one instruction, at least one program, a code set, or an instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the above-described automatic unblocking method for a coal conveying and screening system.

[0041] In summary, this application includes at least one of the following beneficial technical effects:

[0042] 1. By utilizing the impact of screen blockage on the output of under-screen material, the average output of under-screen material is used as a reference standard to measure the degree of screen blockage. The first control signal is output to drive the actuator to run or shut down, thereby realizing the mechanized and automated unblocking of the coal conveying screening system and avoiding various problems caused by manual unblocking.

[0043] 2. The control actuator acts on the screen plate to effectively remove coal accumulation in the screen holes, preventing the screen plate from becoming blocked. This achieves automatic unblocking of the screen plate without affecting the normal operation of the coal conveying and screening system. It has high unblocking efficiency and good unblocking effect, solving the problems of low unblocking efficiency and safety hazards in traditional manual unblocking methods.

[0044] 3. Adjust the screening equipment in real time according to the working parameters of the coal conveying and screening system to maintain a stable coal flow; at the same time, set up a blockage clearing device, and take corresponding measures to intervene in a timely manner when a blockage is detected to eliminate the impact of the blockage and achieve intelligent prevention and blockage elimination. Attached Figure Description

[0045] Figure 1 is a structural block diagram of the automatic unblocking device and the coal conveying and screening system in the embodiments of this application;

[0046] Figure 2 is a structural block diagram of the automatic unblocking device in an embodiment of this application;

[0047] Figure 3 is a flowchart of the automatic unblocking method in an embodiment of this application;

[0048] Figure 4 is a flowchart of the detailed steps of step S3 in Figure 3;

[0049] Figure 5 is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0050] Explanation of reference numerals in the attached drawings: 1. Coal conveying and screening system; 11. Vibrating screen; 12. Crusher; 2. Automatic unblocking device; 3. Control system; 31. Monitoring unit; 32. Processing unit; 33. Output unit; 4. Actuator; 5. Processor; 6. Memory; 7. I / O interface; 8. Communication component; 9. Communication bus. Detailed Implementation

[0051] To better understand the purpose, technical solutions, and advantages of this application, it has been described and illustrated below with reference to the accompanying drawings and embodiments. However, those skilled in the art should understand that this application can be implemented without these details. In some cases, to avoid obscuring various aspects of this application due to unnecessary description, well-known methods, processes, systems, components, and / or circuits already described at a higher level will not be elaborated upon. It will be apparent to those skilled in the art that various modifications can be made to the embodiments disclosed in this application, and the general principles defined in this application can be applied to other embodiments and application scenarios without departing from the principles and scope of this application. Therefore, this application is not limited to the illustrated embodiments, but conforms to the broadest scope consistent with the scope of protection claimed in this application.

[0052] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples.

[0055] To enable those skilled in the art to fully understand the technical solutions provided in this application, a brief explanation of the specific terms involved in the embodiments of this application will be given first.

[0056] The coal conveying and screening system 1 is an important part of the coal processing in a thermal power plant. It includes crushing and screening the coal to meet the particle size requirements for boiler combustion. As shown in Figure 1, the main components include a vibrating screen 11 and a crusher 12.

[0057] Vibrating screen 11 is used to classify the crushed coal according to particle size. The material over the screen is larger coal particles, while the material under the screen is smaller coal particles that meet the screening criteria. The over-screen material is conveyed to the feed inlet of crusher 12 for further crushing, and then returned to vibrating screen 11 for screening until the coal particles are all crushed to the smallest particle size required by the boiler. The under-screen material is directly fed into the boiler. This ensures that the coal particle size meets the requirements for boiler combustion.

[0058] This application discloses an automatic unblocking device for a coal conveying and screening system.

[0059] An automatic unblocking device 2 is installed in the coal conveying and screening system 1.

[0060] As shown in Figure 2, the automatic unblocking device 2 includes a control system 3 and an actuator 4 for unblocking the screen holes.

[0061] For illustrative purposes, the actuator 4 can be a physical striking mechanism that generates vibration by striking the screen plate to eliminate blockages; or a loosening machine that is driven by a hydraulic cylinder and uses plow blades to scrape the raw coal in the blocked area, breaking down its structure and restoring the coal's fluidity; or an air cannon that uses compressed air to create a high-speed airflow to impact the blocked area and eliminate the blockage. The specific screen plate settings are conventional and will not be elaborated further.

[0062] The control system 3 includes a monitoring unit 31, a processing unit 32, and an output unit 33.

[0063] The monitoring unit 31 is used to acquire information on the undersize material of the coal conveying and screening system 1 in real time. The undersize material information is the output of material that meets the screening conditions.

[0064] In illustrative terms, the monitoring unit 31 can be a solid flow meter, weighing sensor, capacitive sensor, photoelectric sensor, or ultrasonic sensor installed at the feed inlet of the undersize material, or it can be an image analysis method to obtain the material output that meets the screening conditions. When selecting a monitoring method, factors such as the properties of the material, the type of screening system, the required measurement accuracy, and the budget can be considered. In some cases, it may be necessary to use multiple methods simultaneously to obtain the most accurate monitoring results.

[0065] For example, the quantity of undersize material can be monitored by periodically weighing it using a load cell; a solid flow meter can be directly installed on the conveyor belt or pipeline of the undersize material to measure the flow rate of the material passing through the sieve; a capacitive sensor can be installed on the conveyor belt of the undersize material to measure the thickness or height of the material; a photoelectric sensor can estimate the quantity of material by monitoring the degree to which the undersize material blocks light; an ultrasonic sensor can measure the material level or volume; and by installing a camera and using image analysis software, the flow of undersize material and its output can be visually monitored.

[0066] The processing unit 32 is used to calculate the average output within a preset time based on the information of the undersized material.

[0067] Interpretively, users can customize the preset time for calculating average yield, thereby adjusting the frequency of clogging detection. Average yield is used as a standard to measure the degree of sieve clogging.

[0068] Output unit 33 is used to output a first control signal based on average output, the first control signal being used to control the operation or shutdown of actuator 4.

[0069] Explanatoryly, users can customize the preset value to determine whether there is no blockage based on the normal output level of the under-screen material during the actual operation of the coal conveying and crushing system 1. The preset value is affected by parameters such as the screen size of the vibrating screen 11 and the particle size of the material.

[0070] For example, multiple congestion levels can be defined based on average output, and a first control signal can be output to control the actuator 4 to operate at different power levels. The first control signal can be output to control the actuator 4 to operate when the average output is less than a preset value, and to control the actuator 4 to stop when the average output is greater than the preset value.

[0071] For illustrative purposes, the actuator 4 is equipped with a preset operating power, meaning that the actuator 4 will operate at the preset operating power when started without any special settings.

[0072] Specifically, output unit 33 is used for:

[0073] When the average output is less than the preset value, if the previous average output is greater than or equal to the preset value, the first control signal is an activation signal, which is used to control the actuator 4 to operate at the preset working power; if the previous average output is less than the preset value, the first control signal is an amplification signal, which is used to increase the working power of the actuator 4.

[0074] When the average output is greater than or equal to the preset value, the first control signal is a shutdown signal, which is used to control the shutdown of the actuator 4.

[0075] Explanatoryly, when the average output consistently falls below the preset value, it indicates that the previous blockage assessment has not been completed before the next blockage assessment result is obtained. This means that the actuator 4's operation at the preset power to clear the screen blockage has not been effective. In this case, the first control signal is an amplification signal, causing the actuator 4 to operate at a higher power to eliminate the blockage. If the subsequent assessment result still indicates no blockage, the amplification signal is again output to further increase the power of the actuator 4 until the blockage is eliminated. Finally, a shutdown signal is output to stop the actuator 4 from operating.

[0076] In some embodiments, a preset operating power is set based on the amplification signal.

[0077] Explained, each output amplification signal is simultaneously set to the preset operating power of actuator 4. Actuator 4 restarts at a re-set, higher power. This avoids the initial preset operating power being too low, requiring multiple amplifications each time to clear the blockage, further reducing the time needed to eliminate the blockage's effects.

[0078] In other embodiments, the monitoring unit 31 is also used to acquire the first operating current in real time, which is the current value of the vibrating screen 11 in the coal conveying and crushing system 1.

[0079] The processing unit 32 is also used to record the target power and target current within the same unblocking cycle, and generate a power-current curve based on the target power and target current within multiple unblocking cycles; wherein, the unblocking cycle is the time between any open signal and the next close signal, the target power is the maximum value of the operating power of the actuator 4 within the unblocking cycle, and the target current is the maximum value of the first operating current within the unblocking cycle.

[0080] Output unit 33 is also used to set a preset operating power based on the first operating current and the power-current curve.

[0081] For illustrative purposes, from the initial reception of the start signal to the subsequent reception of the stop signal by the actuator 4, the maximum value of the first operating current is recorded as the target current, and the maximum operating power achieved by the actuator 4 during this period is recorded as the target power. These two values ​​are recorded as a set of data. Once two or more sets of data are obtained, a power-current curve can be fitted. The power-current curve is continuously refined as the number of data sets increases.

[0082] Explained, before each start signal is output, the first operating current acquired in real time is used as the input to the power-current curve to obtain the corresponding target power. The start signal simultaneously sets this target power as the preset operating power of the actuator 4, and the actuator 4 operates directly at this target power upon restart. If an amplification signal is output, the operating power is adjusted by amplification based on the target power. After the stop signal is output, the target power and target current during this unblocking cycle are recorded, and the power-current curve is corrected. This allows the actuator 4 to match the current blockage level of the vibrating screen 11 with appropriate power, thereby eliminating the impact of blockage as quickly as possible.

[0083] The monitoring unit 31 is also used to stop acquiring information on undersized materials when the first operating current is less than the first preset current value.

[0084] Explained, the operating current of the vibrating screen 11 varies with the weight of the material inside the vibrating screen 11. Therefore, the current value of the vibrating screen 11 can be used to measure the amount of material inside the vibrating screen 11. The user can customize and set a first preset current value based on the first operating current of the vibrating screen 11 when it is running without load, thereby determining whether the decrease in average output is caused by insufficient feeding of the vibrating screen 11. When the first operating current is less than the first preset current value, it is determined that the feeding amount at the feeding end of the vibrating screen 11 is very small or no new material is entering, and there is no need to clear the screen holes. At this time, the acquisition of under-screen material information is stopped, so it is impossible to calculate the average output, let alone determine the degree of blockage. This can avoid erroneous output of the first control signal to drive the actuator 4 to operate.

[0085] The monitoring unit 31 is also used to acquire the second operating current in real time, which is the current value of the crusher 12 in the coal conveying and screening system 1.

[0086] The output unit 33 is also used to output a second control signal when the second operating current is greater than the second preset current value. The second control signal is used to control the vibrating screen 11 to reduce the screen surface inclination angle.

[0087] Explanatoryly, the operating current of the crusher 12 varies with the feed rate, so the current value of the crusher 12 can be used to measure the amount of feed. When the vibrating screen 11 is severely clogged, excessive material accumulates on the vibrating screen 11 during the unblocking process of the automatic unblocking device 2 and is fed into the crusher 12, increasing the pressure on the crusher 12. Material jamming inside the crusher 12 may interrupt the production process, requiring shutdown for cleaning, affecting production continuity, and may also cause motor overload, even burning out the motor in severe cases. Moreover, it can cause material blockage in the crushing chamber, occupying too much space, resulting in insufficient material crushing and affecting the uniformity of the crushed particle size. Therefore, by monitoring the current value of the crusher 12 and outputting a second control signal based on the second operating current to control the vibrating screen 11 to reduce the screen surface inclination angle, thereby reducing the feeding speed and achieving the effect of reducing the load on the crusher 12.

[0088] Explain that the screen inclination angle can be adjusted by changing the support or base of the screen machine. Typically, the vibrating screen 11 is designed to allow users to change the screen inclination angle by rotating or adjusting the support components. By electrically connecting the control system 3 to the adjustment components and controlling it via a second control signal, the screen inclination angle can be automatically adjusted.

[0089] This application also discloses an automatic unblocking method for a coal conveying and screening system.

[0090] Referring to Figure 3, the automatic unblocking method specifically includes the following steps:

[0091] S1: Real-time acquisition of undersize material information from coal conveying and screening system 1. Undersize material information refers to the output of material that meets the screening conditions.

[0092] S2: Calculate the average output within a preset time based on the information of the material under screening.

[0093] S3: Output a first control signal based on the average output. The first control signal is used to control the operation or shutdown of the actuator 4.

[0094] As shown in Figure 4, step S3 specifically includes the following steps:

[0095] S3A: When the average output is less than the preset value, S3A1: If the previous average output is greater than or equal to the preset value, the first control signal is an activation signal, which is used to control the actuator 4 to start at the preset working power; S3A2: If the previous average output is less than the preset value, the first control signal is an amplification signal, which is used to increase the working power of the actuator 4.

[0096] S3B: When the average output is greater than or equal to the preset value, the first control signal is a shutdown signal, which is used to control the shutdown of the actuator 4.

[0097] In some embodiments, step S1 further includes: acquiring a first operating current in real time, wherein the first operating current is the current value of the vibrating screen 11 in the coal conveying and crushing system 1.

[0098] The second operating current is acquired in real time. The second operating current is the current value of the crusher 12 in the coal conveying and screening system 1.

[0099] When the first operating current is less than the first preset current value, the acquisition of undersize material information is stopped.

[0100] Step S2 further includes: recording the target power and target current within the same unblocking cycle, and generating a power-current curve based on the target power and target current within multiple unblocking cycles; wherein, the unblocking cycle is the time between any open signal and the next close signal, the target power is the maximum value of the operating power of the actuator 4 within the unblocking cycle, and the target current is the maximum value of the first operating current within the unblocking cycle.

[0101] Step S3 also includes: setting a preset operating power based on the first operating current and the power-current curve.

[0102] When the second operating current is greater than the second preset current value, a second control signal is output. The second control signal is used to control the vibrating screen 11 to reduce the screen surface inclination angle.

[0103] The features in the above-described automatic blockage clearing method are the same as or similar to the functions performed by the monitoring unit 31, processing unit 32 and output unit 33 described above, as well as the technical details of each function, so they will not be repeated here.

[0104] This application also discloses an electronic device.

[0105] As shown in Figure 5, the electronic device includes a processor 5 and a memory 6, and may further include one or more of an I / O interface 7 and a communication component 8.

[0106] The processor 5 controls the overall operation of the electronic device to complete all or part of the steps in the aforementioned automatic unblocking method. The memory 6 stores various types of data to support the operation of the electronic device. This data may include, for example, instructions for any application or method used to operate on the electronic device, as well as application-related data. The memory 6 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as one or more of the following: Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0107] I / O interface 7 provides an interface between processor 5 and other interface modules, such as keyboards, mice, and buttons. These buttons can be virtual or physical. Communication component 8 is used to test wired or wireless communication between the electronic device and other devices. Wireless communication includes Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination thereof. Therefore, the corresponding communication component 8 may include a Wi-Fi component, a Bluetooth component, and an NFC component.

[0108] The communication bus 9 may include a pathway for transmitting information between the aforementioned components. The communication bus 9 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The communication bus 9 can be divided into an address bus, a data bus, a control bus, etc.

[0109] The electronic device may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the automatic unblocking method given in the above embodiments.

[0110] Electronic devices can include, but are not limited to, mobile terminals such as digital broadcast receivers, PDAs (personal digital assistants), and PMPs (portable multimedia players), as well as fixed terminals such as digital TVs and desktop computers, and can also be servers.

[0111] This application also discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by the processor 5, implements the steps of the above-described automatic unblocking method.

[0112] The computer-readable storage medium may include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0113] It should be understood that although the steps in the flowcharts in the accompanying drawings are shown sequentially as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise expressly stated herein, there is no strict order in which these steps are performed, and they may be performed in other orders.

[0114] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic unblocking device for a coal conveying and screening system, characterized in that, The system includes a control system (3) and an actuator (4) for clearing screen holes. The control system (3) includes: a monitoring unit (31) for real-time acquisition of under-screen material information of the coal conveying and screening system (1), wherein the under-screen material information is the output of material that meets the screening conditions; a processing unit (32) for calculating the average output within a preset time based on the under-screen material information; and an output unit (33) for outputting a first control signal based on the average output, wherein the first control signal is used to control the operation or shutdown of the actuator (4). The actuator (4) is provided with a preset working power. The output unit (33) is used to: when the average output is less than the preset value, if the previous average output is greater than or equal to the preset value, then the first control signal is an opening signal, wherein the opening signal is used to control the actuator (4) to operate at the preset working power; if the previous average output is less than the preset value, then the first control signal is an amplification signal, wherein the amplification signal is used to increase the output. The first control signal is a shutdown signal when the average output is greater than or equal to the preset value, and the shutdown signal is used to control the shutdown of the actuator (4); the monitoring unit (31) is also used to acquire the first working current in real time, and the first working current is the current value of the vibrating screen (11) in the coal conveying and crushing system (1); the processing unit (32) is also used to record the target power and target current in the same unblocking cycle, and generate a power-current curve based on the target power and target current in multiple unblocking cycles; wherein, the unblocking cycle is the time between any of the opening signals and the next closing signal, the target power is the maximum value of the working power of the actuator (4) in the unblocking cycle, and the target current is the maximum value of the first working current in the unblocking cycle; the output unit (33) is also used to set the preset working power according to the first working current and the power-current curve.

2. The automatic unblocking device for a coal conveying and screening system according to claim 1, characterized in that, The output unit (33) is also used to: set the preset operating power according to the amplification signal.

3. The automatic unblocking device for a coal conveying and screening system according to claim 1, characterized in that: The monitoring unit (31) is also used to stop acquiring the undersize material information when the first operating current is less than the first preset current value.

4. The automatic unblocking device for a coal conveying and screening system according to claim 3, characterized in that: The monitoring unit (31) is also used to acquire the second working current in real time, the second working current being the current value of the crusher (12) in the coal conveying and screening system (1); the output unit (33) is also used to output a second control signal when the second working current is greater than the second preset current value, the second control signal being used to control the vibrating screen (11) to reduce the screen surface inclination angle.

5. An automatic unblocking method for a coal conveying and screening system, characterized in that, The coal conveying and screening system (1) is equipped with an actuator (4) for unblocking screen holes; the automatic unblocking method specifically includes the following steps: real-time acquisition of under-screen material information of the coal conveying and screening system (1), wherein the under-screen material information is the output of material that meets the screening conditions; calculation of the average output within a preset time period based on the under-screen material information; output of a first control signal based on the average output, wherein the first control signal is used to control the operation or shutdown of the actuator (4); wherein the actuator (4) is equipped with a preset working power; the step of outputting the first control signal based on the average output specifically includes the following steps: when the average output is less than the preset value, if the previous average output is greater than or equal to the preset value, then the first control signal is an opening signal, wherein the opening signal is used to control the actuator (4) to operate at the preset working power; if the previous average output is less than the preset value, then the first control signal is An amplification signal is used to increase the working power of the actuator (4); when the average output is greater than or equal to the preset value, the first control signal is a shutdown signal, which is used to control the shutdown of the actuator (4); the first working current is acquired in real time, which is the current value of the vibrating screen (11) in the coal conveying and crushing system (1); the target power and target current within the same unblocking cycle are recorded, and a power-current curve is generated based on the target power and target current within multiple unblocking cycles; wherein, the unblocking cycle is the time between any of the opening signals and the next closing signal, the target power is the maximum value of the working power of the actuator (4) within the unblocking cycle, and the target current is the maximum value of the first working current within the unblocking cycle; the preset working power is set according to the first working current and the power-current curve.

6. An electronic device, characterized in that, include: At least one processor (5); a memory (6); at least one application, wherein the at least one application is stored in the memory (6) and configured to be executed by the at least one processor (5), the at least one application being configured to: perform the automatic unblocking method for a coal conveying screening system as described in claim 5.

7. A computer-readable storage medium, characterized in that, The storage medium stores at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, the at least one program, the code set, or instruction set is loaded and executed by the processor (5) to implement the automatic unblocking method for the coal conveying and screening system as described in claim 5.

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