Control device and applicable coal conveying and distribution control system thereof

Abstract

The invention discloses a control device and an applicable coal conveying and distributing control system thereof, and belongs to the field of industrial automatic control. The control device comprises a plurality of control modules, each process link in the coal transportation and distribution control system is controlled through one control module, and the control modules are sequentially connected according to the sequence of the process links and are gradually started; wherein any control module executes corresponding control operation according to pre-packaged program control logic after receiving the step sequence signal, and outputs the step sequence signal to the next control module, so as to trigger the next control module to operate and complete the next process link. Complex control logic in a production process link is modularized, and program control logic is packaged into a functional block, so that a full-automatic program control process of the whole coal conveying and distributing process link is realized.

Description

Technical Field

[0001] The present application belongs to the field of industrial control, and in particular relates to a control device and a coal transportation and distribution control system applicable thereto. Background Art

[0002] Coal is the main energy source in my country and the basic raw material for industries such as coking and dry distillation gasification. In order to obtain coal of qualified quality to meet the needs of industrial production such as large and medium-sized blast furnaces, the quality of coal is the key, and coal storage and coal blending technology are important factors affecting the quality of coal.

[0003] The process of the factory coal transportation and distribution system mainly includes important equipment such as the upper storage belt, the return coal belt, the feeder, the crusher, the scraper, the coal feeder, the mixer, the fan, the drainage pump, the actuator, the fire fighting equipment, the sensor, the actuator, etc. Due to the large number of on-site equipment and the strong coupling of each process section, it is difficult to achieve fully automated process production. Therefore, the traditional coal transportation and distribution production process mostly adopts manual and semi-automatic control methods.

[0004] Since the coal transportation and distribution production process involves the control of a large number of electrical equipment, traditional PLC controllers require on-site PLC engineers to program, which is time-consuming and labor-intensive, and has a low level of automation. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a control device and a coal transportation and distribution control system applicable thereto to realize a fully automated production process of coal transportation and distribution and improve the operating efficiency of production equipment.

[0006] In the first aspect, the present application provides a control device suitable for a coal transportation and distribution control system, wherein the control device comprises multiple control modules, wherein each process link in the coal transportation and distribution control system is controlled by a control module, and the control modules are connected in sequence according to the order of the process links and started step by step; wherein, after receiving a step signal, any control module executes the corresponding control operation according to the pre-packaged program control logic, and outputs a step signal to the next control module to trigger the next control module to run and complete the next process link.

[0007] The control device provided in the present application realizes the automation and modular control of the coal transportation and distribution control system through the transmission mechanism of the step signal combined with the pre-packaged program control logic, and effectively improves the automation level in the coal transportation and distribution production. Through the step-by-step control and startup of each control module, and through the transmission of the step signal, the equipment of each process link is gradually started, ensuring the orderly operation of each link in the coal transportation and distribution system, improving the production efficiency of coal transportation and distribution, and improving the stability and safety of the coal transportation and distribution control system. In addition, since each process link is controlled by a control module, the structure of the coal transportation and distribution control system is highly modular, which not only reduces the complexity of system maintenance, but also has strong scalability and maintainability.

[0008] According to one embodiment of the present application, when the current process link includes multiple branches, the first control module in each branch simultaneously receives the step signal output by the control module of the previous process link, and the step signal output by the last control module of each branch is transmitted to the next process link after logical operation.

[0009] In the above embodiments, by introducing a step signal transmission mechanism of multiple branches and terminal logic operations, parallel control of process links is achieved, system flexibility and adaptability are enhanced, control logic is simplified, conflicts are reduced, and system reliability, efficiency and fault tolerance are improved.

[0010] According to an embodiment of the present application, when the multiple branches are parallel branches, the step signals respectively output by the last control module of each parallel branch are merged through an AND operation, and the merged step signals are transmitted to the next process link.

[0011] In the above embodiment, the synchronization of each parallel branch is ensured by performing AND operation to merge the step signals at the ends of multiple parallel branches; after the step signal output by the last control module of each parallel branch is ANDed, the merged step signal will be passed to the next process link only when all parallel branches are completed, thereby ensuring the sequence and consistency of each process link and enhancing the stability and reliability of the system.

[0012] In the second aspect, the present application provides a coal transportation and distribution control system, which system includes at least a PLC control cabinet, a communication module and a power supply; the PLC control cabinet is provided with a control device as described in the first aspect, the communication module is used to transmit the control signal issued by the control device to the production equipment in the coal transportation and distribution control system, and the power supply is used to supply power to the PLC control cabinet.

[0013] The coal transportation and distribution control system provided by the present application, through a highly modular control device, combined with a step signal transmission mechanism, gradually activates the control module in the control device to execute the pre-packaged program control logic, thereby realizing the automation and modular control of the coal transportation and distribution control system, and effectively improving the automation level in the coal transportation and distribution production. Through the gradual control and startup of each control module, and through the transmission of the step signal, the equipment of each process link is gradually started, ensuring the orderly operation of each link in the coal transportation and distribution system, improving the coal transportation and distribution production efficiency, and improving the stability and safety of the coal transportation and distribution control system. In addition, since each process link is controlled by a control module, the structure of the coal transportation and distribution control system is highly modular, which not only reduces the complexity of system maintenance, but also has strong scalability and maintainability.

[0014] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 is a schematic diagram of the structure of a coal transportation and distribution control system provided in some embodiments of the present application;

[0017] Figure 2 It is a flow chart of the program control logic of the coal transportation and distribution control system provided in some embodiments of the present application;

[0018] Figure 3 This is a functional block pin diagram of a single drive control module provided in some embodiments of the present application;

[0019] Figure 4 is a functional block pin diagram of a dual drive control module provided in some embodiments of the present application;

[0020] Figure 5 It is a schematic diagram of the modular structure of the program control logic of the coal transportation and distribution control system provided in some embodiments of the present application;

[0021] Figure 6 It is a schematic diagram of the modular structure of the programmable logic of the coal transportation and distribution control system provided in other embodiments of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0024] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0027] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0028] The factory coal transportation and coal blending production system is a typical continuous production process. The production environment is harsh, dusty, noisy, and has many controlled devices, which poses a great threat to the health and safety of on-site production workers, and the workers' work intensity is high. In view of this, the embodiment of the present application uses a PLC controller to perform configuration programming in the form of custom function blocks, modularizes the complex control logic, encapsulates the program control logic into function blocks, completes the coal transportation and blending program control, and realizes the "one-click production" fully automated production process of coal transportation and blending, which not only reduces the production cost of the enterprise and the labor intensity of the workers, but also improves the production efficiency of the enterprise.

[0029] In addition, the implementation of custom function blocks reduces the workload of on-site PLC engineers, improves work efficiency, and facilitates the subsequent maintenance of PLC programs. Through the fully automated production process of "one-click production" for coal transportation and blending, the coal blending parameters are optimized to ensure the quality of coal powder and the efficient operation of coal transportation equipment, improve the level of factory automation, and maximize the production benefits of the enterprise.

[0030] The coal transportation and distribution control system has three control modes: manual, semi-automatic, and program-controlled automatic. When the coal transportation process is in continuous batch production, program control is the optimal production control method. In this method, the operator's workload is minimal. Only the pre-set production process-related parameters need to be input, and after completing the confirmation check before the equipment is started, the operator can perform "one-key production" operation. When the automatic production fails, it can be switched to manual working mode.

[0031] The control device and coal transportation and distribution control system provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0032] The coal transportation and distribution control system provided in the embodiment of the present application can be as follows Figure 1As shown. Among them, the coal transportation and distribution control system at least includes a PLC control cabinet, a communication module and a power supply. Among them, the PLC control cabinet is a cabinet that installs PLC (Programmable Logic Controller) and other auxiliary equipment (such as I / O modules, power supplies, relays, etc.), and is the central control part of the industrial automation system. A control device is provided in the PLC control cabinet, and the control device is responsible for executing the control program, interacting with the production equipment on site, processing input signals, and outputting control signals. The control device is, for example, a PLC controller. Exemplarily, the PLC controller receives input signals from field equipment (such as sensors, switches, buttons, etc.), executes program-controlled logic, and outputs control signals to control the actions of the executing equipment (such as motors, valves, conveyor belts, etc.). The communication module includes an I / O module and a switch, and the communication module includes an I / O module and a switch, which is responsible for realizing the communication between the PLC and the field equipment, other PLCs or computers. For example, the I / O module is used to transmit the control signal sent by the control device to the production equipment in the coal transportation and distribution control system. The power supply is used to supply power to the PLC control cabinet. A switch is a network device used to connect PLC controllers, I / O modules, remote I / O stations and other devices to ensure data transmission between modules. A switch can be a device based on industrial communication protocols such as Ethernet, PROFINET, Ethernet / IP, etc.

[0033] Exemplarily, the PLC controller, I / O modules, switches, and power supplies are deployed in a control box and placed in an electrical control room. The remote I / O station is connected to the PLC controller via the ModbusTCP bus protocol and communicates based on the Ethernet communication protocol, with good system response speed and communication interface expansion flexibility. The remote I / O station is an industrial automation device used to connect field devices to the PLC control system and transmit input / output signals through the network. The remote I / O station consists of multiple I / O modules and is usually arranged far away from the PLC controller to collect data from field devices and transmit control signals to the actuator. The remote I / O station communicates with the PLC control system through industrial communication protocols (such as Modbus, PROFINET, EtherCAT, etc.).

[0034] In an embodiment of the present application, the control device includes a plurality of control modules. The control modules are connected in sequence according to the order of the process links and started step by step. Each control module is encapsulated with a program control logic (hereinafter referred to as program control logic) and is activated by a sequence signal, so that each control module can autonomously perform corresponding operations after receiving the sequence signal. The program control logic can realize the automatic sequential start, stop, pause and reset control functions of the equipment, and supports single-step and multi-step sequence control. Emergency stop, electrical input protection, and timeout failure will suspend the operation of the entire sequence control program. At the same time, after controlling the start of the corresponding equipment, each control module outputs a sequence signal to trigger the operation of the next control module, thereby realizing accurate scheduling and management in the entire coal transportation and distribution process.

[0035] Among them, the step signal (Step) is the necessary information for transmitting the entire program control, and all control modules need to receive the step signal. That is, in the program control logic, the rising edge of the step signal of the upstream step activates the control module of the current step, and the step signal is a necessary condition for the automatic operation of the control module.

[0036] For example, the control module is configured and programmed by a PLC controller using ST (Structured Text) custom function blocks, modularizing the complex control logic in the production process, and encapsulating the program control logic into function blocks (Function Block Diagram, FBD) to achieve a fully automated program control process for the entire process of coal transportation and distribution. Among them, the function block diagram is a graphical programming language used to describe the logical functions in the automatic control system. It uses graphical symbols to represent the logical units in the system through "function blocks", and these function blocks are connected through connecting lines to transmit data and control signals.

[0037] In the automated production process of coal transportation and distribution, the control module is used to control the various process links of the coal transportation and distribution production line, such as material transmission, automatic sorting, etc., to improve the industrial automation level of the coal transportation and distribution control system and improve industrial production efficiency. This application modularizes the complex coal transportation and distribution control logic and divides the control program into multiple control modules, each of which is responsible for different control functions, thereby making the control system clearer, maintainable and easy to expand.

[0038] For example, the coal transportation and distribution process includes multiple process links, such as transportation, distribution, storage, etc. Each process link requires different control logic. Therefore, by controlling the start or stop of production equipment in each process link through various control modules, a fully automated coal transportation and distribution process can be achieved without human intervention, and it is convenient for on-site debugging and maintenance.

[0039] After each control module controls the corresponding equipment to start up, it outputs a step signal to trigger the next control module to control. That is to say, for any control module, after receiving the step signal, it performs the corresponding control operation according to the pre-packaged program control logic, and outputs the step signal to the next control module to trigger the next control module to run and complete the next process link.

[0040] Exemplarily, the process links of the coal transportation and distribution control system include at least a coal plowing link, a scraper link, a storage link, a coal return link, a crushing link, a coal feeding link and a fan link. Each process link includes one or more production equipment. Taking the coal plowing link as an example, the link includes one or more coal plows, and each coal plow is controlled by a control module. The control modules corresponding to the above process links are connected in sequence according to the order of the process links, such as a coal plowing control module-scraper control module-storage control module-coal return control module-crushing control module-coal feeding control module-fan control module, etc.

[0041] When the coal transportation and distribution control system starts, each control module gradually controls the corresponding equipment to start in reverse order of coal flow, such as Figure 2 As shown in the figure, after the coal blending parameters are initialized, the coal transportation and distribution control system, for example, starts the coal plow, scraper, upper storage belt, return coal belt, crusher, coal feeder and fan in sequence. After the current control cycle ends, if the program control is terminated, the coal transportation and distribution control system ends operation. In the case where the coal transportation and distribution control system ends operation, each control module gradually controls the corresponding equipment to stop in the order of the coal flow, for example, stops the fan, coal feeder, crusher, return coal belt, upper storage belt, scraper and coal plow in sequence. If the program control of the next cycle is continued, the above process is executed again.

[0042] Therefore, by introducing reverse coal flow and forward coal flow control strategies, precise control of each equipment in the coal transportation system is achieved, and the production equipment is gradually started and stopped in a reasonable sequence, avoiding system failures caused by conflicts or uncoordinated operations between equipment.

[0043] The control modules in the embodiment of the present application include a single drive control module SFC_1DRIVE and a dual drive control module SFC_2DRIVE. The overall program control logic of the coal transportation and distribution control system includes several single drive control modules and several dual drive control modules. Each control module is connected by a step sequence signal.

[0044] The single drive control module is used to control the start, stop, hold, alarm, fault reset, etc. of the single drive device. For example, the functional structure diagram of the single drive module is as follows: Figure 3 As shown in Figure 1. A single driver module includes multiple functional pins, which include input pins and output pins. Figure 3As shown, the functional pins of the single drive module are defined as follows:

[0045] RM_mode: mode switching;

[0046] SP_time: limit feedback timeout;

[0047] E_stop: emergency stop switch;

[0048] I_Alrm: electrical input protection;

[0049] IL_start: automatic start condition;

[0050] Auto_start: Automatic start;

[0051] Auto_stop: automatic stop;

[0052] RUN_fb: running status feedback;

[0053] Reset: fault reset;

[0054] Start: Start output;

[0055] Stop: stop output;

[0056] Fault: timeout fault alarm;

[0057] Step: The step action completion mark, that is, the step sequence signal.

[0058] Among them, the pin types include Boolean type (Bool) and time type (Time). Boolean type represents a logical value, usually used to represent the state of "true" or "false". Time type is used to represent a time value, usually used for timing, delay or time interval processing.

[0059] Among them, RM_mode is the determining factor of whether the control module is activated. The input of the mode switching pin is used to determine whether the single drive control module is in automatic program-controlled step mode or manual control mode. That is, when the RM_mode input is "true", it means that the control module is in automatic program-controlled step mode, otherwise it is in manual control mode. Among them, "true" means that the state of the input signal is activated, enabled, valid or meets the conditions; on the contrary, "false" means that the state of the input signal is inactivated, disabled, invalid or does not meet the conditions. For example, when the pin is high, the input is "true"; when the pin is low, the input is "false".

[0060] In the automatic program-controlled sequence mode, the coal distribution control system will automatically start and stop the equipment and control it according to the pre-set sequence. In the manual control mode, the operator can manually control the start and stop of the equipment without relying on the automatic program-controlled logic of the coal distribution control system.

[0061] The emergency stop switch pin is used to immediately cut off the power supply of the equipment or stop the operation of the equipment in an emergency, and ensure that the system can be safely shut down in an emergency through interlock protection. That is, when the emergency stop switch pin input is true, the interlock protection mechanism is triggered, the control module stops the operation of the current equipment, and stops sending the step signal to the next control module to prevent further equipment damage or safety accidents.

[0062] When the single drive control module is activated by the step signal, the automatic start pin input is "true", and the mode switch pin input is "true", the corresponding device will start normally. After the device startup action is completed, the single drive control module outputs the step signal to the next step, that is, the next control module. The next control module can be a single drive control module or a dual drive control module. Similarly, when the control module is in operation and the automatic stop pin input is "true", the device will stop normally.

[0063] Therefore, through the mode switching pin of the control module, the system can flexibly select the automatic program-controlled step mode or the manual control mode. In the automatic mode, the system can automatically control the start and stop of the equipment according to the preset process flow, while in the manual mode, the operator can directly intervene and start and stop manually. This flexible mode switching improves the adaptability of the system and can cope with different production needs.

[0064] In the automatic program-controlled sequence mode, the transmission of the sequence signal ensures that the equipment can start and stop in a predetermined order. The control module will only activate the equipment when it receives the activation signal from the previous module and the start-up conditions are met. This sequential control greatly reduces the risk of conflict or wrong start-up between equipment and ensures the stability of the production process. Furthermore, the gradual activation between control modules is used to control the gradual start-up of the corresponding equipment, which improves the reliability and automation level of the system and realizes the integrated automated production of the coal transportation and distribution process.

[0065] The dual drive control module is used to control the forward start / reverse start, stop, hold, alarm, fault reset, etc. of the dual drive device. For example, the functional structure diagram of the dual drive module is as follows: Figure 4 As shown in Figure 1. The dual drive module includes multiple functional pins, including input pins and output pins. Figure 4 As shown, the functional pins of the dual drive module are defined as follows:

[0066] RM_mode: mode switching;

[0067] SP_time: limit feedback timeout;

[0068] E_stop: emergency stop switch;

[0069] I_Alrm: electrical input protection;

[0070] IL_startdv: Automatic forward start condition;

[0071] IL_startrv: automatic reverse start condition;

[0072] Auto_startdv: Automatic forward start;

[0073] Auto_startdv: automatic reverse start;

[0074] Auto_stop: automatic stop;

[0075] DV_runfb: forward running status feedback;

[0076] RV_runfb: reverse run status feedback;

[0077] Reset: fault reset;

[0078] Start_DV: forward start output;

[0079] Start_RV: reverse start output;

[0080] Stop: stop output;

[0081] Fault: timeout fault alarm;

[0082] Step: The step action completion mark, that is, the step sequence signal.

[0083] When the dual-drive control module is activated by the step signal, the automatic forward start pin input is "true" or the automatic reverse start pin input is "true", and the mode switch pin input is "true", the corresponding device will start normally. After the device startup action is completed, the dual-drive control module outputs the step signal to the next step, that is, the next control module. The next control module can be a single-drive control module or a dual-drive control module. Similarly, when the control module is in operation and the automatic stop pin input is "true", the device will stop normally.

[0084] Among them, the automatic forward start pin input and the automatic reverse start pin input are interlocked, and only one of the two pin inputs can be true, that is: the automatic forward start pin input is "true" and the automatic reverse start pin input is "false"; or, the automatic reverse start pin input is "false" and the automatic reverse start pin input is "true". When both are "true" or "false", the automatic start pin input is invalid, the control module will not be activated, and the corresponding device will not be started.

[0085] Therefore, by providing a mode switching pin, the dual-drive control module supports flexible switching between automatic program-controlled step mode and manual control mode. In automatic mode, the system can automatically control the device startup according to the pre-set step sequence, while in manual mode, the operator can manually intervene according to actual needs. This design enables the system to operate efficiently under different operating requirements, combining automation and flexibility.

[0086] The dual drive control module adopts a mutually exclusive start mechanism, that is, the device can only trigger forward start or reverse start. This avoids the risk of equipment damage or operation errors caused by two conflicting commands being input at the same time during the startup process. The mutual exclusion mechanism ensures safety and reliability during the device startup process.

[0087] The system ensures that the equipment can be started in a predetermined order by transmitting step signals, and the downstream equipment can be activated only after the upstream equipment has completed startup. This step-by-step control ensures the orderly operation of each device and avoids production accidents or equipment overloads caused by incorrect equipment sequence. Furthermore, the gradual activation between control modules is used to control the gradual startup of the corresponding equipment, which improves the reliability and automation level of the system and realizes the integrated automated production of the coal transportation and distribution process.

[0088] like Figure 3 and Figure 4 As shown, the input pins of the control module also include an automatic start condition pin. The automatic start condition pin is used to receive an external input signal, indicating whether the control module can automatically start the controlled device. Therefore, accordingly, the condition for triggering the start of the controlled device also includes: the input of the automatic start condition pin is true. That is, when all the above conditions are met, the input of the automatic start condition pin needs to be "true" before the control module activates the automatic start operation of the corresponding device.

[0089] In actual applications, the signal of the automatic start condition pin is usually linked to the working status of the equipment, production process requirements or other logical conditions. For example, only when the upstream equipment is ready and the relevant process meets the requirements, the automatic start condition pin will become "true", thereby triggering the start of downstream equipment (such as coal feeder, fan, etc.).

[0090] Therefore, by introducing the automatic start condition pin, the control logic can be further simplified to ensure that the equipment automatically starts when the predetermined conditions are met without manual intervention. In this way, the system can start the equipment in sequence according to the process requirements without manual operation, thus improving the level of automatic control.

[0091] The control module is also equipped with a fault reset pin to deal with faults that occur during the execution of the program control logic. The fault reset pin is used to receive reset instructions so that the system can handle faults. When the control module encounters a fault (such as equipment failure, signal abnormality, etc.) when executing the program control logic, the input of the fault reset pin will be activated, that is, the input is "true". During this period, the control module will maintain the current step, and the step sequence signal will no longer be passed to the next control module, avoiding equipment conflicts or production process errors caused by faults, and ensuring that the entire control system will not be out of order or skip steps due to faults.

[0092] In the case of a fault and maintaining the current step, the control module can input a reset signal through the fault reset pin to instruct the system to handle the fault and reset to a normal state. After the reset, the control module can restart the transmission of the step sequence signal and return to a normal working state. Through the reset signal, the system can effectively avoid the occurrence of continuous errors and ensure that the equipment can return to the correct workflow.

[0093] In the control module, each input pin is configured with a priority. The above-mentioned emergency stop switch pin, electrical input protection pin, etc. can be called protective pins, which are used to protect the normal operation of the equipment and prevent equipment damage. Therefore, based on the consideration of on-site production safety and personal safety protection, the program-controlled protection logic is: interlock protection and emergency stop are the highest priority, and manual control instructions have a higher priority than automatic control instructions. Corresponding to the control module, the priority of the protective pin is higher than that of other input pins.

[0094] Taking the emergency stop switch pin as an example, when the emergency stop button of the device is pressed, the corresponding control module receives the input signal of the emergency stop switch pin as "true". No matter what state other control signals (such as start, stop or step signal) are in, the system will force the device to stop and give priority to the emergency stop operation.

[0095] In addition, the automatic stop pin has a higher priority than the regular input signal. When the automatic stop pin input of the device is "true", the system will shut down the device and perform the stop operation first regardless of the status of other control signals (such as start, stop or step signals).

[0096] Therefore, by configuring the priority pins, especially the high priority design of the protective pins, the system can automatically perform the necessary protection operations in the face of an emergency, ensuring the reliability of the control system. Operators can ensure the safety of equipment and personnel without manual intervention, improving the overall safety of the system. In an emergency, the activation of the protective pin will suspend the current operation and perform the necessary protection measures, which can effectively prevent the expansion of the fault and reduce the complexity of the system fault. The reset operation can quickly restore the normal operation of the system after the fault is eliminated, simplifying the fault handling process and shortening the downtime.

[0097] In combination with the above embodiments, the entire program control logic of the coal transportation and distribution control system can be implemented by a control device including a plurality of single drive control modules and a plurality of dual drive control modules. For example, the structure of the control module in the control device can be as follows: Figure 5As shown. For example, the control device includes 6 control modules, including 3 single-drive control modules and 3 dual-drive control modules. The first single-drive control module determines whether to be activated by the result of the AND of the input signal of the automatic start pin (Auto_start) and the step signal output by the previous control module (i.e., the last dual-drive control module). When the single-drive control module is activated, that is, when the step signal and the input of the automatic start pin are both "true", the single-drive control module controls the corresponding production equipment to start, such as controlling the start of the coal plow. Similarly, the single-drive control module determines whether to stop normally by the result of the AND of the input signal of the automatic stop pin (Auto_stop) and the step signal output by the previous control module (i.e., the last dual-drive control module). Only when the step signal and the input of the automatic stop pin are both "true", the single-drive control module controls the corresponding production equipment to stop running, such as controlling the stop of the coal plow. Then, after the first single-drive control module controls the start-up of the production equipment, it outputs a step signal and transmits the step signal to the next control module, that is, the second control module, which is a dual-drive control module. The dual-drive control module determines whether to activate by the result of the "and" of the input signal of the automatic forward start pin (Auto_startdv) or the automatic reverse start pin (Auto_startrv) and the step signal output by the previous module. For the dual-drive control module, it only supports forward start or reverse start. Therefore, the dual-drive control module will be activated when the automatic forward start pin input is true, the automatic reverse start pin input is false, and the received step signal is true, or when the automatic forward start pin input is false, the automatic reverse start pin input is true, and the received step signal is true. When the automatic forward start pin input is true and the automatic reverse start pin input is true, the automatic start pin input is invalid. The dual-drive control module controls the operation of the corresponding equipment, such as controlling the operation of the scraper. Then, the dual-drive control module outputs a step signal to pass it to the next control module... Each control device is activated step by step in sequence, so that the production equipment is gradually started, realizing the automated control of industrial production.

[0098] Understandably, Figure 5 The number of control modules and the order of the control modules are just examples and can be adjusted according to on-site production conditions in actual industrial scenarios.

[0099] Figure 5The diagram shows a scenario where each control module is connected in sequence. In some scenarios, a process link may have multiple branches, and the equipment in each branch needs to be started or stopped at the same time, and the output step signal of the terminal control module of each branch needs to be passed to the next process link after logical operation. For example, in the coal plowing link, multiple coal plows are included, and each coal plow can work at the same time. After all coal plows have been started, the equipment (such as a scraper) of the next process link will be started.

[0100] To this end, when the current process link includes multiple branches, the first control module in each branch, that is, the control module located at the entrance of the branch, needs to simultaneously receive the step signal output by the control module of the previous process link, which indicates the task completed by the upstream link and triggers the execution of the downstream link. The step signal output by the last control module of each branch is transmitted to the next process link after logical operation. In other words, after completing the control operation, the last control module of each branch will pass the output step signal to the next process link, but before that, the step signal needs to be processed by logical operation to ensure that the signals of multiple branches can be reasonably converged and correctly transmitted to the next process link. Logical operations include but are not limited to "and" operations (i.e., "AND" operations), "or" operations (i.e., "OR" operations), etc. Through such operations, it is ensured that the step signal can continue to be transmitted downward only when all conditions are met.

[0101] If the tasks of multiple branches are carried out in parallel, the branch entry control module simultaneously receives the step signal output by the control module of the previous process link, and the "AND" operation is used at the end of each branch, indicating that the step signal will not be passed until the tasks of all branches are completed. If some branches need to pass the step signal after completing a task, the "OR" operation can be used, indicating that as long as one branch task is completed, the step signal can continue to be passed down.

[0102] For example, Figure 6 As shown, after the single drive control module controls the start-up of the production equipment, it outputs a step signal and transmits the step signal to the next process link. In the next process link, the two dual drive control modules are parallel branches, and the two dual drive control modules simultaneously receive the step signal output by the single drive control module. After the two dual drive control modules are activated and control the normal start-up of the corresponding equipment, they output step signals respectively. The step signals output by the two dual drive control modules need to be ANDed and then transmitted to the next control module.

[0103] Therefore, the control modules in each branch work together to ensure that the task can be completed smoothly and the step signal can be transmitted correctly. Based on the branch and logic operation mechanism, the system can flexibly adapt to complex process requirements and handle multiple parallel tasks. This design can flexibly add new branches or adjust processes as needed to enhance the scalability of the system. When adding branches to new process links, the system can easily adjust by configuring the input and output logic without large-scale changes to the architecture of the existing control modules.

[0104] Through branch design, the system can process multiple process links in parallel to improve production efficiency. Each branch can run independently without affecting each other, thus shortening the overall production cycle.

[0105] This application uses the PLC programming control platform for configuration programming, and uses the MaVIEW ST programming language function block encapsulation method to achieve full automation control of the coal transportation and distribution production process section. Starting from coal unloading and feeding, the PLC algorithm performs parameter initialization operations. After the coal distribution parameters are initialized, the coal feeder, scraper, upper warehouse belt, return coal belt, feeder, crusher and other equipment are started and operated in sequence. According to the production requirements of the coal transportation and distribution process, the equipment startup sequence must follow the reverse coal flow process. When production stops, the corresponding equipment must be stopped according to the coal flow process, otherwise it will cause equipment damage and production hazards. Each process in the control process can be paused, keep the current step or return to the initial position of the program. The entire coal transportation and distribution process realizes automated control, saves on-site manpower input, realizes efficient production, and greatly improves production efficiency. At the same time, it reduces production costs and equipment maintenance costs, and improves personnel work efficiency and health and safety.

[0106] The embodiment of the present application further provides a chip, which includes the control device in the above embodiment. For example, the chip can encapsulate the program control logic of each control module in the control device.

[0107] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0108] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0110] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0112] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0113] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0114] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0115] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control device, characterized in that: Applicable to a coal transportation and distribution control system, the control device includes multiple control modules, each process link in the coal transportation and distribution control system is controlled by a control module, and the control modules are connected in sequence according to the order of the process links and started step by step; wherein, after receiving a step signal, any control module executes the corresponding control operation according to the pre-packaged program control logic, and outputs a step signal to the next control module to trigger the next control module to run and complete the next process link.

2. The device according to claim 1, characterized in that When the current process link includes multiple branches, the first control module in each branch simultaneously receives the step signal output by the control module of the previous process link, and the step signal output by the last control module of each branch is transmitted to the next process link after logical operation.

3. The device according to claim 2, characterized in that In the case where the multiple branches are parallel branches, the step signals respectively output by the last control module of each parallel branch are combined through an AND operation, and the combined step signal is transmitted to the next process link.

4. The device according to any one of claims 1 to 3, characterized in that The types of the control modules include single-drive control modules and dual-drive control modules. The single-drive control module is used to control the operation of a single-drive device and output a step signal, and the dual-drive control module is used to control the operation of a dual-drive device and output a step signal.

5. The device according to claim 4, characterized in that The single drive control module includes an input pin and an output pin, wherein the input pin includes at least a mode switching pin and an automatic start pin; The input of the mode switching pin is used to determine whether the single drive control module is in the automatic program control step mode or the manual control mode; When the single drive control module is in the automatic program control step mode, when the single drive control module is activated by the step signal transmitted by the previous control module and the automatic start pin input is true, the controlled single drive device is triggered to start; After the single-drive device completes startup, the single-drive control module also outputs a step sequence signal to the next control module through an output pin.

6. The device according to claim 4, characterized in that The dual drive control module includes input pins and output pins, wherein the input pins include at least a mode switching pin and an automatic start pin; the automatic start pins include an automatic forward start pin and an automatic reverse start pin; The input of the mode switching pin is used to determine whether the dual drive control module is in the automatic program control step mode or the manual control mode; When the dual-drive control module is in the automatic program-controlled step mode, when the dual-drive control module is activated by the step signal transmitted by the previous control module, the automatic forward start pin input or the automatic reverse start pin input is mutually exclusive and one of the automatic start pin inputs is true, the controlled dual-drive device is triggered to start; After the dual-drive device completes startup, the dual-drive control module also outputs a step sequence signal to the next control module through an output pin.

7. The device according to claim 5 or 6, characterized in that The input pin of the control module also includes an automatic start condition pin; the condition for triggering the start of the controlled device also includes: the input of the automatic start condition pin is true.

8. The device according to claim 5 or 6, characterized in that The input pins of the control module further include an automatic stop pin; when the control module is activated and the input of the automatic stop pin is true, the control module controls the corresponding device to stop normally.

9. The device according to claim 5 or 6, characterized in that When a fault occurs during the execution of the program-controlled logic, the control module maintains the current step and stops transmitting the step sequence signal to the next control module.

10. The device according to claim 5 or 6, characterized in that Each of the input pins is respectively configured with a priority; the input pins also include a protective pin, and the priority of the protective pin is higher than the priority of other input pins.

11. The device according to claim 1, characterized in that The process links of the coal transportation and distribution control system include coal plowing link, scraper link, storage link, coal return link, crushing link, coal feeding link and fan link; each process link includes one or more production equipment; each production equipment is controlled by a control module.

12. The device according to claim 1, characterized in that When the coal transportation and distribution control system starts to start, each control module gradually controls the corresponding equipment to start in the reverse order of coal flow; when the coal transportation and distribution control system ends operation, each control module gradually controls the corresponding equipment to stop in the same order of coal flow.

13. A coal transportation and distribution control system, characterized in that: The system includes at least a PLC control cabinet, a communication module and a power supply; the PLC control cabinet is provided with a control device as described in any one of claims 1 to 11, the communication module is used to transmit the control signal issued by the control device to the production equipment in the coal transportation and distribution control system, and the power supply is used to supply power to the PLC control cabinet.

Images