Anti-explosion control system for grain processing production line

Abstract

The invention discloses a grain processing production line explosion-proof control system, which comprises a composite production line, and the composite production line comprises grain processing production lines of sorghum, peas and soybeans. The comprehensive maintenance hardware comprises anti-explosion hardware, three-way circulation hardware and rotating speed monitoring hardware, and the comprehensive maintenance hardware jointly guarantees the production safety of the grain processing production line of sorghum, peas and soybeans through the anti-explosion hardware, the three-way circulation hardware and the rotating speed monitoring hardware; and the control system intelligently intervenes and controls the operation of the comprehensive maintenance hardware, and controls the operation of different production processes, and relates to the technical field of grain processing production lines. According to the invention, the starting sequence and starting delay of each motor can be conveniently changed on a configuration software interface, which is convenient for clients to carry out real-time adjustment in actual use.

Description

Technical Field

[0001] The invention relates to the technical field of grain processing production lines, in particular to an explosion-proof control system for a grain processing production line. Background Art

[0002] Grain processing is the process of converting raw grains into food or products that can be eaten or used for other purposes. This process usually includes multiple steps, from cleaning and screening the raw materials to final processing and packaging. Different grain crops (such as wheat, corn, rice, soybeans, etc.) have different processing processes.

[0003] This application mainly describes the processing of sorghum, soybeans and peas, and elaborates on the following problems of grain production lines in the prior art

[0004] 1. The traditional control system can only start in sequence in the control mode, and it is not easy to change the start delay and start sequence;

[0005] 2. Traditional control systems cannot achieve multi-mode processing according to the diverse needs of customers;

[0006] 3. The traditional control system cannot realize the electric control across the three-way and the signal feedback of whether it is in place;

[0007] 4. The traditional control system cannot monitor the speed of the elevator in real time. If the elevator is blocked and grain is stuck, it cannot be stopped in real time, which may cause more serious consequences. Even if there is a speed measuring device, it is generally a module with a timing function, which is simple in structure and not durable. More importantly, it cannot communicate with the PLC program. The traditional stall detection mechanism generally has only one detection pointer, which makes it more delayed in detection time. Because the detection program in the system detects the number of passing pointers within a fixed time period and then calculates the speed. Since the speed of the elevator fluctuates, the period of one rotation of the pointer is not completely equal to the timing period of the system, so the number of passing pointers in two adjacent periods may be more or less, and the fewer the number of pointers, the fewer the number of pointers passing per unit time, so this error will be magnified, thereby affecting the accuracy of speed measurement. In order to solve this contradiction, the traditional stall detection mechanism can only extend the timing period to reduce the error, but at the same time, it also causes serious lag in the time point of discovering the stall.

[0008] 5. When encountering a fault, the traditional control system can only simply shut down the machine and cannot take different disposal measures according to the different degrees of fault crisis.

[0009] 6. Traditional control systems are usually located around the equipment and cannot achieve remote control of the equipment. For processing areas with explosion risks, traditional control systems cannot achieve true physical isolation.

[0010] 7. Traditional control systems generally only have operating buttons or just a simple control screen on the distribution cabinet, with limited functions and a rigid and ungraphic human-computer interaction interface.

[0011] 8. In the traditional production line control system, one production line corresponds to one host computer (i.e. one computer). If three production lines use the same host computer, conflicts are likely to occur, and the program is difficult to write.

[0012] 9. Traditional control systems usually require a very large space, and even divide a control system into a PLC cabinet and a power cabinet, which are connected by several signal lines to ensure that the PLC cabinet controls the power cabinet. However, in explosion-proof control systems, the distribution cabinet is often required to be dustproof, waterproof and explosion-proof. Then the signal transmission line between the PLC cabinet and the power cabinet will greatly affect the waterproof, dustproof and explosion-proof effect of the distribution cabinet, which not only increases the difficulty in production, but also increases the risk during customer use. Summary of the invention

[0013] The purpose of the present invention is to provide an explosion-proof control system for a grain processing production line to solve the problems raised in the above-mentioned background technology.

[0014] To achieve the above-mentioned object, the present invention provides the following technical solutions: an explosion-proof control system for a grain processing production line, comprising a composite production line, wherein the composite production line comprises a grain processing production line of sorghum, peas and soybeans;

[0015] Comprehensive maintenance hardware, which includes explosion-proof hardware, three-way circulation hardware and speed monitoring hardware. The comprehensive maintenance hardware jointly ensures the production safety of grain processing production lines such as sorghum, peas and soybeans through the explosion-proof hardware, three-way circulation hardware and speed monitoring hardware; and a control system, which intelligently intervenes and controls the operation of the comprehensive maintenance hardware and the operation of different production processes.

[0016] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, wherein the composite production line is started by one-touch switch, and the switch includes one or more of a panel button or configuration software.

[0017] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the sorghum processing production line includes two sub-processing production lines, and the two sub-processing production lines each contain a peeling machine. The control system intervenes in the two sorghum sub-processing production lines and is provided with six processing technology formulas, the six processing technology formulas include a peeling operation process for sub-line one, a peeling operation process for sub-line two, a peeling operation process for the entire line, a peeling operation process for sub-line one without peeling, a peeling operation process for sub-line two without peeling, and a peeling operation process for the entire line.

[0018] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, wherein the three-way flow hardware controls the efficient and correct mode switching of six processing technology recipes.

[0019] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, wherein the speed monitoring hardware is used to monitor the operating speed of each production line, and the speed monitoring hardware can also set an alarm threshold to handle abnormal processing alarms of each production line.

[0020] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the explosion-proof hardware is delayed started through a preset sequence of the control system, and an overcurrent and overload protection device is arranged inside the explosion-proof motor.

[0021] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the overcurrent and overload protection device includes an electromagnetic contactor and a thermal protector, and the explosion-proof motor monitors the loop current in real time through the electromagnetic contactor and the thermal protector.

[0022] As a further solution of the present invention: an explosion-proof control system for a grain processing production line also includes explosion-proof motor fault levels, and each of the fault levels is provided with a corresponding preparatory processing method.

[0023] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the three-way flow hardware obtains signal feedback of material flow and detects the material flow status through the control system.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The starting sequence and starting delay of each motor in this control system can be easily changed in the configuration software interface, which is convenient for customers to make real-time adjustments in actual use;

[0026] 2. This control system has formulated six different processing technology formulas for customers based on their personalized needs, which is convenient for customers to use at any time.

[0027] 3. This control system can realize electric control across the three-way and signal feedback on whether it is in place;

[0028] 4. This control system can detect the speed of each hoist, can calculate the speed of the hoist in real time, and can set the alarm threshold, that is, when the speed of the hoist is lower than a certain value, the control system can send an alarm to the user. This speed measuring device converts the on-off current signal of the detection probe into a signal recognizable by the PLC through an advanced isolation fence, thereby realizing information exchange and can be controlled by the host computer; this stall detection mechanism has a qualitative improvement in the accuracy and timeliness of speed measurement. First, the flower-shaped pointer allows the sensor to detect 10 signals within one rotation cycle of the pointer, so the number of signals detected in the same time is 10 times the original, greatly improving the accuracy of the detection. If the same number of detection signals are obtained, the timing cycle can be shortened by 10 times, which also effectively reduces the lag of speed measurement.

[0029] 5. Different fault levels are preset in this control system. When different explosion-proof motors fail, the system determines the urgency level to be different, and the corresponding measures taken by the system are also different. This avoids the phenomenon that the production line stops or reduces production due to some minor problems.

[0030] 6. This control system realizes remote indoor start and stop control and monitoring alarm of three production lines through integrated design and development, and realizes isolation control of all electrical appliances in the dust explosion-proof area of ​​Zone 21.

[0031] 7. This control system designs a visual operation interface through the three-dimensional model of the equipment. Through this control interface, you can intuitively see the start and stop of each equipment, whether it is faulty, and the fault alarm, realizing real-time monitoring of the three production lines and quickly determining the fault point.

[0032] 8. This system has designed three control interfaces for the three production lines respectively. The three control interfaces can be opened on the same computer and can be switched to control each production line at any time.

[0033] 9. Explosion-proof system design, the control system includes executive motor, PLC component control cabinet and upper display system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A model diagram of a grain production line in an explosion-proof control system of a grain processing production line of the present invention;

[0035] Figure 2 ;

[0036] Figure 3 . DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0039] In an embodiment of the present invention, an explosion-proof control system for a grain processing production line includes a composite production line, wherein the composite production line includes a grain processing production line for sorghum, peas, and soybeans, such as Figure 1 The overall layout of the production line is shown. The outermost is the sorghum production line, which consists of two parallel branch lines with the same equipment, and each branch line contains a peeling machine. During the design, six different processing technology recipes were formulated for customers based on their personalized needs. They are: 1# line with peeling (i.e. branch line one with peeling process), 2# line with peeling (i.e. branch line two with peeling process), the whole line with peeling (i.e. the whole line with peeling process), 1# line without peeling (i.e. branch line one without peeling process), 2# line without peeling (i.e. branch line two without peeling process), the whole line without peeling (i.e. the whole line without peeling process). Next to the sorghum line is the pea production line, and on the other side of the factory is the soybean production line;

[0040] All executive motors are explosion-proof series motors. The contact surfaces between the motor base end cover, junction box, and junction box bottom joint are set as flameproof surfaces. Sealant and gaskets are applied to the joints. The protection level is IP55, and no electric sparks are generated during operation.

[0041] The explosion-proof design of the PLC component control cabinet, firstly, adopts a sealed design, the outlets are all installed with sealed insulated corrugated pipe joints, and sealed explosion-proof mud is applied; secondly, the control cabinet door is sealed by sticking sealing strips on the sub-ports; thirdly, a positive pressure working environment with external clean air input is adopted to ensure that the electrical components are not in contact with flammable and explosive air and dust; fourthly, the pre-alarm system is designed with flammable gas detection sensors P6, P7, dust concentration sensors P1-P5 and temperature sensor PT100 near the control cabinet, and the PLC reads the data of flammable gas, dust and temperature in the environment in real time through RS485 communication, and stores and records them in real time. If an abnormality occurs, the system can stop the electrical output of the equipment in time and send an alarm message, and directly cut off the power supply when necessary to ensure the safety of the site.

[0042] The host computer system is installed in an office environment with clean air, which can monitor the operating status of the equipment safely and reliably.

[0043] As a further solution of the present invention: comprehensive maintenance hardware, the comprehensive maintenance hardware includes explosion-proof hardware, three-way circulation hardware and speed monitoring hardware, and the comprehensive maintenance hardware jointly ensures the production safety of the grain processing production line of sorghum, peas and soybeans through the explosion-proof hardware, three-way circulation hardware and speed monitoring hardware; and a control system, the control system intelligently intervenes and controls the operation of the comprehensive maintenance hardware, controls the operation of different production processes,

[0044] Other embodiments of the present invention: The three-way circulation hardware controls the efficient and correct mode switching of six processing technology formulas. In order to ensure the correct operation of the above six modes of the sorghum line, not only a complete PLC control program is compiled, but also an electric crossing tee is added at the peeling machine. This crossing tee can realize the flow of materials into the peeling machine or across the peeling machine. Its baffles are "through" or "across" on the left and right sides respectively, and the power element that controls this baffle is an electric push rod that can detect the top and tail end limits and can feedback signals. At the same time, the top and tail ends of this electric push rod are just in place on the left and right sides of the crossing tee baffle. In this way, whenever the electric push rod feeds back the PLC signal, the position of the crossing tee is just in place, and the PLC continues to start the next motor, so that the system automatically detects whether the position of the push rod is correct, and then determines whether the position of the crossing tee baffle is correct, avoiding the material from flowing into the wrong equipment.

[0045] The sorghum line and the pea line share the same set of feeding equipment. In order to avoid material mixing during feeding, the above-mentioned electric crossing tee is also used at the boundary above the silo. In this way, electric control and signal feedback are used to double ensure that material mixing is avoided during feeding.

[0046] This control system realizes speed detection of each hoist through a specific detection mechanism. The structure diagram of the detection mechanism is as follows Figure 2 and Figure 3 As shown. As the hoist runs, the pointer piece installed on the driven shaft also rotates. When each pointer on the pointer piece passes through the proximity switch, the proximity switch will generate an on-off current signal, which will be converted into a signal pattern that the PLC can recognize through the isolation barrier. The detection program in the PLC detects the number of pointers passing through in a fixed time period and then calculates the speed.

[0047] This function can not only detect the speed of the elevator, but also set the alarm threshold. That is, when the speed of the elevator is lower than a certain value, the control system can issue an alarm to the user, which is the stall detection function.

[0048] The control circuits of this control system are configured with electromagnetic contactors and thermal protectors, which can detect the current size in the power circuit in real time, protect the explosion-proof motor in real time, and avoid overcurrent and overload.

[0049] This control system adopts an advanced fault level control mode. That is, different fault levels are preset in the control system. When different explosion-proof motors fail, the system determines the urgency level to be different, and the corresponding measures taken by the system are also different, including: full shutdown and alarm, partial shutdown and alarm, and no shutdown but alarm. For example, the following table shows the fault level and emergency measures of the sorghum line.

[0050] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, wherein the speed monitoring hardware is used to monitor the operating speed of each production line, and the speed monitoring hardware can also set an alarm threshold to handle abnormal processing alarms of each production line.

[0051] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the explosion-proof hardware is delayed started through a preset sequence of the control system, and an overcurrent and overload protection device is arranged inside the explosion-proof motor.

[0052] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the overcurrent and overload protection device includes an electromagnetic contactor and a thermal protector, and the explosion-proof motor monitors the loop current in real time through the electromagnetic contactor and the thermal protector.

[0053] As a further solution of the present invention: an explosion-proof control system for a grain processing production line also includes explosion-proof motor fault levels, and each of the fault levels is provided with a corresponding preparatory processing method.

[0054] As a further solution of the present invention: an explosion-proof control system for a grain processing production line, the three-way flow hardware obtains signal feedback of material flow through the control system and detects the material flow status

[0055] The working principle of the present invention is: the explosion-proof control system of the grain processing production line (hereinafter referred to as the control system) is composed of an explosion-proof motor, control and power cables, a stall detection device, an electric crossing three-way control device, a PLC program, a power distribution cabinet, a control computer and configuration software. Its main function is to intelligently control the start and stop of the explosion-proof production line to realize different production processes of the production line.

[0056] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An explosion-proof control system for a grain processing production line, characterized in that: It includes a composite production line, which includes a grain processing production line for sorghum, peas and soybeans; Comprehensive maintenance hardware, including explosion-proof hardware, three-way circulation hardware and speed monitoring hardware, which jointly ensure the production safety of sorghum, pea and soybean grain processing production lines through explosion-proof hardware, three-way circulation hardware and speed monitoring hardware; as well as A control system, wherein the control system intelligently intervenes and controls the operation of the comprehensive maintenance hardware and controls the operation of different production processes.

2. The explosion-proof control system of a grain processing production line according to claim 1 is characterized in that: The composite production line is started by one button of a switch, and the switch includes one or more of a panel button or a configuration software.

3. The explosion-proof control system of a grain processing production line according to claim 2 is characterized in that: The sorghum processing production line includes two sub-processing production lines, and each of the sub-processing production lines contains a peeling machine. The control system intervenes in the two sorghum sub-processing production lines and is provided with six processing technology formulas, and the six processing technology formulas include a peeling operation process for sub-line one, a peeling operation process for sub-line two, a peeling operation process for the entire line, a peeling operation process for sub-line one without peeling, a peeling operation process for sub-line two without peeling, and a peeling operation process for the entire line.

4. The explosion-proof control system for a grain processing production line according to claim 3 is characterized in that: The three-way flow hardware controls the efficient and correct mode switching of six processing technology recipes.

5. The explosion-proof control system for a grain processing production line according to claim 4 is characterized in that: The speed monitoring hardware is used to monitor the operating speed of each production line. The speed monitoring hardware can also set alarm thresholds to handle abnormal processing alarms of each production line.

6. The explosion-proof control system for a grain processing production line according to claim 5, characterized in that: The explosion-proof hardware is started with a delay in a preset sequence of the control system, and an overcurrent and overload protection device is arranged inside the explosion-proof motor.

7. The explosion-proof control system for a grain processing production line according to claim 6, characterized in that: The overcurrent and overload protection device includes an electromagnetic contactor and a thermal protector, and the explosion-proof motor monitors the loop current in real time through the electromagnetic contactor and the thermal protector.

8. The explosion-proof control system for a grain processing production line according to claim 7, characterized in that: It also includes explosion-proof motor fault levels, each of which is provided with a corresponding preparatory processing method.

9. The explosion-proof control system of a grain processing production line according to claim 8, characterized in that: The three-way circulation hardware obtains signal feedback of material circulation and detects the material circulation status through the control system.

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