Tobacco placing system based on distributed weighing control unit

Abstract

The utility model discloses a tobacco leaf swing stick feeding system based on distributed weighing control unit relates to tobacco processing machinery equipment technical field, including host computer, swing stick platform conveyer belt and a plurality of weighing control units, and a plurality of weighing control units are correspondingly set in swing stick platform conveyer belt multiple feeding stations, and are connected with main control unit and main switch cabinet respectively. Weighing control unit contains electronic belt scale, weighing meter head, drive module and state monitoring module, and weighing meter head is installed on electronic belt scale, and each component divides and completes tobacco conveying, weighing, start -stop drive and state monitoring. Host computer is connected drive module, weighing meter head and state monitoring module, and handles data and executes feeding control logic and fault diagnosis logic. The system realizes station independent control and accurate feeding, and can realize automatic troubleshooting, only stops the fault station when the fault, avoids the whole machine shutdown, improves production efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing machinery and equipment technology, and in particular to a tobacco leaf feeding system based on a distributed weighing and control unit. Background Technology

[0002] In the leaf re-drying process, the feeding of raw materials is a crucial step, and the stability and accuracy of the feeding flow rate directly determine the uniformity of the quality of subsequent leaf re-drying and cigarette products. Existing technologies have achieved preliminary automation control by introducing electronic belt scales, RFID positioning, and controllers, effectively reducing the impact of human factors. However, existing systems generally lack real-time monitoring capabilities for the operating status of underlying actuators (such as circuit breakers and contactors). After a fault occurs, manual troubleshooting is required, resulting in excessively long average equipment repair times and severely impacting production continuity.

[0003] Therefore, there is an urgent need for a tobacco leaf feeding system with high real-time performance, high reliability, and high automation. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a tobacco leaf feeding system based on a distributed weighing and control unit.

[0005] To achieve the above objectives, this utility model provides a tobacco leaf feeding system based on a distributed weighing and control unit, comprising: Main controller, swing platform conveyor belt and multiple weighing control units; Multiple weighing and control units are respectively set up corresponding to multiple feeding stations on the swing platform conveyor belt, and the multiple weighing and control units are respectively controlled and connected to the main controller and electrically connected to the main power cabinet. The weighing and control unit includes an electronic belt scale, a weighing head, a drive module, and a status monitoring module. The weighing head is installed on the electronic belt scale, which is used to carry and transport tobacco leaves to the swing platform conveyor belt. The weighing head is used to collect the weight data of the tobacco leaves on the electronic belt scale in real time. The drive module is used to drive the electronic belt scale to start and stop. The status monitoring module is used to monitor the working status of the drive module and generate a fault code and issue an alarm when a fault is detected. The main controller is connected to the drive module for control and to the weighing head and status monitoring module for communication.

[0006] Preferably, the main controller integrates a Profinet communication module, and the main controller is connected to the weighing head and the status monitoring module via Profinet industrial Ethernet.

[0007] Preferably, the tobacco leaf feeding system further includes a human-machine interface platform and an alarm device. The alarm device is installed on the human-machine interface platform, which is communicatively connected to the main controller. The human-machine interface platform is used to display the feeding process and equipment operating status in real time. The alarm device is electrically connected to the main controller and is used to issue an audible and visual alarm signal when the status monitoring module detects a fault.

[0008] Preferably, the electronic belt scale is equipped with a drive motor and a weighing sensor, the drive module is controlled and connected to the drive motor to control the operation of the electronic belt scale, and the weighing sensor is communicatively connected to the weighing indicator.

[0009] Preferably, the drive module includes a motor power supply circuit, which includes a first circuit breaker, a second circuit breaker, an AC contactor, a control relay, and a disconnecting switch; The first circuit breaker is located in the main electrical cabinet, the second circuit breaker, AC contactor and control relay are located in the instrument box, the instrument box is located around the electronic belt scale, and the disconnecting switch is located around the weighing control unit; The first circuit breaker and the second circuit breaker are connected in series, the control relay is connected to the digital output port of the main controller, and the AC contactor is connected in series between the second circuit breaker and the electronic belt scale; The status monitoring module is used to collect the series signal of the first circuit breaker and the second circuit breaker, the auxiliary normally open contact signal of the AC contactor, and the auxiliary contact signal of the disconnecting switch.

[0010] Preferably, the drive module further includes an instrument power supply circuit, which includes a single-pole circuit breaker and a surge protector. The single-pole circuit breaker is installed in the main electrical cabinet, and the surge protector is installed in the instrument box. The single-pole circuit breaker and the surge protector are connected in series. The status monitoring module is also used to collect the series signal of the single-pole circuit breaker and surge protector.

[0011] Preferably, the multiple weighing and control units are connected to the main electrical cabinet via plug-in connectors.

[0012] Preferably, the weighing control unit and the swing platform conveyor belt are mounted on the frame, and the weighing control unit is located on the side of the swing platform conveyor belt.

[0013] Preferably, the tobacco leaf feeding system further includes a central monitoring computer, which is communicatively connected to the human-machine interface platform and the main controller.

[0014] Preferably, the tobacco leaf feeding system further includes a Profinet switch, and the main controller communicates with the weighing head and status monitoring module through the Profinet switch.

[0015] Based on this, the beneficial effects of this utility model are as follows: 1. Through the solution of this utility model, multiple weighing and control units form their own nodes and are connected to the main controller through Profinet communication, which enables real-time and efficient data transmission between the two, and single point of failure is strictly isolated so as not to affect the operation of other parts of the system. The distributed structure design greatly improves the system performance and reliability. 2. The solution of this utility model ensures the real-time nature of weight feedback through high-speed communication based on Profinet, improves control accuracy, and, combined with dynamic control algorithm, achieves precise closed-loop control of the feeding weight, ensuring that different types of tobacco leaves are accurately fed according to the preset formula ratio, keeping the total feeding flow highly stable, providing a prerequisite for subsequent homogenization processing, and improving the uniformity of product quality. 3. Through the solution of this utility model, the fault diagnosis module is set up to compare the instructions issued by the main controller with the status feedback of the status monitoring module and the driving module in real time. It can locate and alarm instantly when a fault occurs, and improve the fault troubleshooting from "human experience" to "system self-diagnosis", which greatly shortens the maintenance time. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram illustrating the structure of a tobacco leaf feeding system according to one embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the electrical control and status monitoring principle of a weighing control unit according to one embodiment of the present invention.

[0017] Explanation of reference numerals in the attached diagram: 10-Main controller, 20-Swing platform conveyor belt, 30-Weighing control unit, 301-Electronic belt scale, 302-Weighing indicator, 303-Drive module, 3031-Motor power supply circuit, 3032-Instrument power supply circuit, 304-Status monitoring module, 40-Profinet switch, 50-Rack, 60-Human-machine interaction platform, 70-Central monitoring computer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a," "the," and "the" as used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should be understood that although terms such as first, second, third, etc., may be used to describe related structures in the embodiments of this application, these related structures should not be limited to these terms. These terms are only used to distinguish related structures from each other.

[0021] Depending on the context, the word "if" as used here can be interpreted as "when" or "when". Similarly, depending on the context, the phrase "if determined" can be interpreted as "when determined" or "when (the condition or event of the statement) is detected".

[0022] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0023] Figure 1 This schematic diagram illustrates the structure of a tobacco leaf feeding system according to one embodiment of the present invention. Figure 2 This schematic diagram illustrates the electrical control and status monitoring principle of a weighing control unit according to one embodiment of the present invention, as shown below. Figure 1-2 As shown, the present invention provides a tobacco leaf feeding system based on a distributed weighing and control unit, comprising: Main controller 10, swing platform conveyor belt 20 and multiple weighing control units 30; Multiple weighing and control units 30 are respectively set up with multiple feeding stations on the swing platform conveyor belt 20. The multiple weighing and control units 30 are respectively connected to the main controller 10 and respectively connected to the main electrical cabinet (not shown in the figure). The weighing and control unit 30 includes an electronic belt scale 301, a weighing head 302, a drive module 303, and a status monitoring module 304. The weighing head 302 is installed on the electronic belt scale 301. The electronic belt scale 301 is used to carry and transport tobacco leaves to the swing platform conveyor belt 20. The weighing head 302 is used to collect the weight data of the tobacco leaves on the electronic belt scale 301 in real time. The drive module 303 is used to drive the electronic belt scale 301 to start and stop. The status monitoring module 304 is used to detect the working status of the drive module 303 and generate a fault code when a fault is detected. The main controller 10 is connected to the drive module 303 for control and to the weighing head 302 and the status monitoring module 304 for communication. The main controller 10 is used to receive weight data and fault codes, and to control the drive module 303 to operate according to the weight data so that the electronic belt scale 301 can feed materials, and to locate the fault location of the equipment according to the fault codes.

[0024] Specifically, the main controller 10 is a PLC (Programmable Logic Controller) that integrates a Profinet communication module (not shown in the figure). The weighing head 302 is equipped with a Profinet communication interface (not shown in the figure). The main controller 10 is connected to the weighing head 302 and the status monitoring module 304 through the Profinet switch 40.

[0025] The weighing control unit 30 and the swing table conveyor belt 20 are mounted on the frame 50, and the weighing control unit 30 is located on the side of the swing table conveyor belt 20.

[0026] Through the above settings, this utility model ensures the real-time nature of weight feedback based on Profinet's high-speed communication. Combined with the control algorithm, it achieves precise closed-loop control of the feeding weight, ensuring that different types of tobacco leaves are accurately fed according to the preset ratio, thereby improving the uniformity of product quality.

[0027] Furthermore, the tobacco leaf feeding system includes a human-machine interface platform 60 and an alarm device (not shown in the figure). The alarm device is installed on the human-machine interface platform 60 and is used to issue an audible and visual alarm signal when the status monitoring module 304 detects a fault.

[0028] Specifically, the human-machine interaction platform 60 is used to display the real-time weight, operating status and alarm information of each weighing control unit 30. At the same time, the human-machine interaction platform 60 is also used for human-machine interaction, providing single-machine start-stop control, parameter setting and alarm reset functions with multi-level password permission verification.

[0029] Furthermore, the main controller 10 integrates a dynamic precision feeding control module (not shown in the figure) for executing feeding control logic. The dynamic precision feeding control module is configured to receive and judge the weighing data detected by the weighing head 302 of a certain station in real time, and determine whether the weighing data has reached the preset target value and the set interval time. If it has, a start command is sent to the drive module 303 of that station.

[0030] like Figure 2 As shown, through the setting of the dynamic precision feeding control module, it can continuously and cyclically scan the real-time weighing data of the weighing head 302 at all workstations. If the weight at a certain workstation is within the preset threshold range and after a set interval (such as 1 second), the main controller 10 sends a "start" command to the drive module 303 of that workstation, and then re-cycles the scanning. The drive module 303 controls the electronic belt scale 301 to operate to realize the tobacco leaf conveying. If the weight at a certain workstation is greater than the high end of the preset threshold range or less than the low end of the preset threshold range, a "stop" command is sent to the drive module 303 of that workstation. The drive module 303 controls the electronic belt scale 301 to stop operating. After the weight detected by the weighing head 302 is within the preset threshold range again, a "start" command is sent to that workstation to realize the tobacco leaf conveying, and then the scanning cycle is restarted.

[0031] Through the above control, this utility model can achieve high real-time weight feedback and fast and accurate control of feeding, effectively improve feeding efficiency and accuracy, reduce material waste, ensure the continuity and stability of the production process, and adapt to feeding needs in multiple scenarios.

[0032] Furthermore, the main controller 10 integrates a fault diagnosis module (not shown in the figure) that executes fault diagnosis logic. The fault diagnosis module is configured to receive the working status of a certain workstation drive module 303 in real time and compare it with the corresponding instruction issued by the main controller 10. If the two are different, it is determined that the weighing control unit 30 has failed and the fault signal is sent to the terminal.

[0033] Specifically, such as Figure 2 As shown, the drive module 303 includes a motor power supply circuit 3031, which includes a first circuit breaker QF1A1, a second circuit breaker QF2A1, an AC contactor KM1, a control relay KA1, and a disconnecting switch QS1. The first circuit breaker QF1A1 is installed in the main electrical cabinet, the second circuit breaker QF2A1, AC contactor KM1 and control relay KA1 are installed in the instrument box (not shown in the figure), the instrument box is installed around the electronic belt scale 301, and the disconnecting switch QS1 is installed around the weighing control unit 30, together forming the start-stop and protection circuit of the motor in the electronic belt scale 301. The status monitoring module 304 is electrically connected to the first circuit breaker QF1A1, the second circuit breaker QF2A1, the AC contactor KM1, the control relay KA1, and the disconnecting switch QS1, and detects the on / off status of each of them.

[0034] The first circuit breaker QF1A1 and the second circuit breaker QF2A1 are used for current overload protection or circuit fault protection. By cutting off the power supply, damage to the motor and the line is avoided. At the same time, the graded protection of the two circuit breakers fully ensures the safe operation of the motor and the circuit.

[0035] The AC contactor KM1 is used to control the on / off state of the control circuit and is responsible for the on / off control under normal operating conditions, while the first circuit breaker QF1A1 and the second circuit breaker QF2A1 are responsible for the circuit disconnection under fault conditions.

[0036] The control relay KA1 is connected to the digital output port of the main controller 10 to isolate the digital output signal of the main controller 10 and to control the on / off state of the AC contactor KM1.

[0037] The disconnecting switch QS1 is installed on-site and used to switch the circuit on and off during equipment failure maintenance.

[0038] Furthermore, the drive module 303 also includes an instrument power supply circuit 3032, which includes a single-pole circuit breaker F1A1 and a surge protector F2. The single-pole circuit breaker F1A1 and the surge protector F2 are connected in series. The single-pole circuit breaker F1A1 is installed in the main electrical cabinet, and the surge protector F2 is installed in the instrument box.

[0039] When the status monitoring module 304 monitors, the operating status of the drive module 303 includes: the series signal of the first circuit breaker QF1A1 and the second circuit breaker QF2A1, the series signal of the single-pole circuit breaker F1A1 and the surge protector F2, the auxiliary normally open contact signal of the AC contactor KM1, and the auxiliary contact signal of the disconnector QS1. After detection, the above operating status is sent to the main controller 10.

[0040] The main controller 10 determines whether the workstation is faulty by judging whether it receives the auxiliary contact feedback signal within the specified time of issuing the "start" command. If no feedback signal is received, it indicates that the workstation is faulty, and the fault information is sent to the terminal and an alarm is triggered so that the user can be aware of it.

[0041] This system replaces manual troubleshooting with automatic fault diagnosis at workstations, enabling precise problem location, significantly reducing maintenance time, minimizing human error and repetitive work, and significantly improving overall work efficiency, thus providing more efficient technical support for the stable operation of the production process.

[0042] Furthermore, the main controller 10 integrates a data filtering module (not shown in the figure). The data filtering module is used to identify the weighing data continuously monitored by the weighing head 302 and remove outliers. The outlier value is a value that exceeds the average of multiple weighing data (such as 10 consecutive sets) by ±5%.

[0043] Specifically, the data filtering module integrates a data filtering algorithm that uses a moving average filter combined with a threshold rejection mechanism to identify and remove outliers in continuous weighing data that exceed ±5% deviation. This algorithm can effectively reduce the impact of accidental interference on the data, making the weighing data more consistent with the actual weight, thereby improving the reliability and accuracy of subsequent data applications.

[0044] Furthermore, the tobacco leaf feeding system also includes a central monitoring computer 70, which is connected to the human-machine interface platform 60 and the main controller 10. The central monitoring computer 70 is used for upper-level monitoring (such as production data statistics, historical faults, etc.) and on-site operation (such as remote control of workstation start and stop). It can monitor and operate simultaneously, so that the staff does not need to frequently switch between the monitoring terminal and the operation terminal. They can directly view the system operation status, such as feeding progress, operating parameters, etc. on the computer in real time, and simultaneously complete the issuance of on-site operation instructions, which greatly improves the convenience and efficiency of operation.

[0045] In summary, this utility model, by setting up multiple weighing and control units 30, implements independent control of each workstation: when a workstation malfunctions, only the operation of the malfunctioning workstation needs to be stopped, while the remaining workstations can continue to operate normally, effectively avoiding the drawback of traditional equipment where the entire machine stops due to a single workstation malfunction, and ensuring production continuity. Simultaneously, with the collaboration of the dynamic precision feeding control module and the data filtering module, the feeding amount is accurately controlled, reducing material deviation; coupled with the fault diagnosis module to monitor the equipment status in real time, automatic stop control can be triggered when a fault occurs, without manual intervention, significantly reducing labor costs and significantly improving the operating efficiency and stability of the tobacco leaf feeding process.

[0046] The above description is merely a preferred embodiment of this application. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A tobacco leaf feeding system based on a distributed weighing and control unit, characterized in that, Includes a main controller, a swing platform conveyor belt, and multiple weighing control units; Multiple weighing and control units are respectively set up corresponding to multiple feeding stations on the swing platform conveyor belt, and the multiple weighing and control units are respectively controlled and connected to the main controller and electrically connected to the main power cabinet. The weighing and control unit includes an electronic belt scale, a weighing head, a drive module, and a status monitoring module. The weighing head is installed on the electronic belt scale, which is used to carry and transport tobacco leaves to the swing platform conveyor belt. The weighing head is used to collect the weight data of the tobacco leaves on the electronic belt scale in real time. The drive module is used to drive the electronic belt scale to start and stop. The status monitoring module is used to monitor the working status of the drive module and generate a fault code and issue an alarm when a fault is detected. The main controller is connected to the drive module for control and to the weighing head and status monitoring module for communication.

2. The tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The main controller integrates a Profinet communication module, and the main controller is connected to the weighing head and the status monitoring module via Profinet industrial Ethernet.

3. The tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The tobacco leaf feeding system also includes a human-machine interface platform and an alarm device. The alarm device is installed on the human-machine interface platform, which is communicatively connected to the main controller. The human-machine interface platform is used to display the feeding process and equipment operating status in real time. The alarm device is electrically connected to the main controller and is used to issue an audible and visual alarm signal when the status monitoring module detects a fault.

4. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The electronic belt scale is equipped with a drive motor and a weighing sensor. The drive module is connected to the drive motor to control the operation of the electronic belt scale, and the weighing sensor is communicatively connected to the weighing indicator.

5. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The drive module includes a motor power supply circuit, which includes a first circuit breaker, a second circuit breaker, an AC contactor, a control relay, and a disconnect switch. The first circuit breaker is located in the main electrical cabinet, the second circuit breaker, AC contactor and control relay are located in the instrument box, the instrument box is located around the electronic belt scale, and the disconnecting switch is located around the weighing control unit; The first circuit breaker and the second circuit breaker are connected in series, the control relay is connected to the digital output port of the main controller, and the AC contactor is connected in series between the second circuit breaker and the electronic belt scale; The status monitoring module is used to collect the series signal of the first circuit breaker and the second circuit breaker, the auxiliary normally open contact signal of the AC contactor, and the auxiliary contact signal of the disconnecting switch.

6. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 5, characterized in that, The drive module also includes an instrument power supply circuit, which includes a single-pole circuit breaker and a surge protector. The single-pole circuit breaker is installed in the main electrical cabinet, and the surge protector is installed in the instrument box. The single-pole circuit breaker and the surge protector are connected in series. The status monitoring module is also used to collect the series signal of the single-pole circuit breaker and surge protector.

7. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The multiple weighing and control units are respectively connected to the main electrical cabinet via plug-in connector groups.

8. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The weighing control unit and the swing platform conveyor belt are mounted on the frame, and the weighing control unit is located on the side of the swing platform conveyor belt.

9. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 3, characterized in that, The tobacco leaf feeding system also includes a central monitoring computer, which is communicatively connected to the human-machine interface platform and the main controller.

10. A tobacco leaf feeding system based on a distributed weighing and control unit according to claim 1, characterized in that, The tobacco leaf feeding system also includes a Profinet switch, and the main controller communicates with the weighing head and status monitoring module through the Profinet switch.

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