Tobacco shred making material channel safety protection system and safety protection control method

Abstract

The invention discloses a safety protection system and a safety protection control method for a tobacco shred making material channel, and belongs to the technical field of tobacco machinery, the safety protection system comprises a safety protection device arranged on the periphery of a moving trolley and a track of the moving trolley, the safety protection device is a frame fence net in closed connection, and each face of the frame fence net is provided with a small door; each small door is provided with a proximity switch and a door lock, and the proximity switches are used for detecting the opening and locking states of the door locks; the photoelectric tube and the bar code scanner are arranged at a material receiving port of the moving trolley, and the photoelectric tube is used for detecting the cigarette packets transmitted to the moving trolley in real time and generating cigarette packet detection signals; the bar code scanner is used for detecting the type of the cigarette packet transmitted to the mobile trolley and generating a cigarette packet type signal; and the remote control terminal comprises a control module and is used for receiving the door lock state signal, the cigarette packet detection signal and the cigarette packet type signal and generating a mobile trolley control signal and a door lock control signal in combination with the operation state signal and the production state signal.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco machinery, and in particular relates to a tobacco leaf shred material channel safety protection system and a safety protection control method. Background Art

[0002] The cigarette making process refers to the process of making tobacco leaves into cigarettes, including two major processes: shredding and cigarette rolling, connecting and packaging. Among them, the tobacco leaf processing links in the tobacco leaf shredding workshop can be divided into the pre-slicing link and the post-slicing link, namely the leaf link and the leaf shred link. The leaf link includes two logistics channels, one is the tobacco leaf logistics channel, and the other is the thin leaf logistics channel, which transport different types of tobacco leaves respectively. The two channels are independent of each other and do not interfere with each other. The process of material advancement in the leaf link is as follows: Figure 1 As shown, several cigarette packs (containing tobacco blocks) stored in the formula library enter the cigarette pack track of the silk-making workshop through an elevator. After the pack opening machine process, the cigarette packs are stripped of the outer skin of the cigarette box and only the tobacco blocks are retained. The tobacco blocks are divided into two types, one is ordinary tobacco, hereinafter referred to as tobacco, which is processed through the main channel (i.e., tobacco logistics channel) process, and the other is thin tobacco, which needs to be processed through the thin channel (i.e., thin leaf logistics channel) process. The two types of cigarette packs select the corresponding channel for processing according to their specific tobacco block types.

[0003] Normally, the tobacco logistics channel and the thin leaf material channel share a mobile trolley (also referred to as a mobile trolley) as a transmission tool. A track suitable for the movement of the trolley is provided between the two channels. The default position of the trolley is at one end of the tobacco processing channel (the default is the initial end). Only when it is detected that the tobacco leaf blocks in the cigarette package are thin tobacco leaves, after the thin tobacco leaves are transported to the mobile trolley, the mobile trolley starts to move and moves to one end of the thin tobacco processing channel. After the thin tobacco leaves are transported out of the mobile trolley, the mobile trolley returns to the default position.

[0004] In the tobacco leaf processing link of the above-mentioned tobacco leaf silk workshop, the mobile cart only moves on the track between the main channel and the thin-sheet channel. However, during the movement of the mobile cart, one end of the main channel will be empty. Due to the large track gap, the cigarette packs are often loose, causing tobacco leaves to fall on the track, and foreign objects (such as paper, hemp rope, etc.) appear on the mobile cart. At this time, the operator needs to enter the track space for adjustment. However, due to the fast speed of the mobile cart and the small space of the moving area, the specification requires manual control of the mobile cart to stop moving before entering the track area for operation. However, in actual situations, the mobile cart must be stopped, adjusted, and then started. The entire operation is cumbersome. For the convenience of operation, the operator often directly enters the track area, which poses a large risk factor and cannot guarantee the safety of the employees' lives. Moreover, when some outsiders are not clear about the specific situation, they may also mistakenly enter the track area, which poses a certain safety risk. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a safety protection system and a safety protection control method for a tobacco leaf silk-making material channel, and aims at the problem that there are safety risks when a mobile cart moves on a track between a main channel and a thin channel in the tobacco leaf processing link of a tobacco leaf silk-making workshop. By arranging a safety protection device on the periphery of the mobile cart and its track, and arranging an automatic control method for opening and locking the door lock on the device and for the operation of the mobile cart, automatic control of the operation of the mobile cart when the door lock is locked and the braking when the door lock is opened is realized from the software and hardware levels, thereby improving the safety of operation and ensuring the life safety of employees and the equipment safety of the mobile cart.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] A first aspect of the present invention provides a tobacco shred material channel safety protection system.

[0008] A tobacco leaf shred material channel safety protection system, comprising:

[0009] A safety protection device is arranged on the periphery of the mobile trolley and its track. The safety protection device is a closed frame guardrail net, and a small door is opened on each side of the frame guardrail net. Each small door is equipped with a proximity switch and a door lock. The proximity switch is used to detect the opening and locking status of the door lock;

[0010] A photoelectric tube and a barcode scanner are arranged at the material receiving port of the mobile trolley, wherein the photoelectric tube is used to detect the cigarette packs transmitted to the mobile trolley in real time and generate a cigarette pack detection signal; the barcode scanner is used to detect the type of the cigarette packs transmitted to the mobile trolley and generate a cigarette pack type signal;

[0011] The remote control terminal includes a control module; the control module is used to receive a door lock status signal, a cigarette pack detection signal, and a cigarette pack type signal, and generate a mobile trolley control signal and a door lock control signal in combination with an operation status signal and a production status signal.

[0012] In a further technical solution, the remote control terminal further comprises a touch screen, and the touch screen is used to generate a cigarette pack type selection signal;

[0013] The control module includes a logic control circuit, a first relay, a PLC controller, and a second relay that are electrically connected in sequence; the PLC controller is used to compare and verify the cigarette package type selection signal generated by the touch screen with the cigarette package type signal generated by the barcode scanner, and generate a process start signal and a process stop signal according to the verification result; wherein, the comparison and verification is: when the cigarette package types in the cigarette package type selection signal and the cigarette package type signal are the same, the verification is successful and a process start signal is generated; otherwise, the verification fails, a process stop signal is generated and an alarm is issued.

[0014] A further technical solution is that the logic control circuit adopts an AND gate logic circuit, and the door lock status signals of multiple small doors generate a total door lock signal Y after passing through the AND gate logic circuit. The total door lock signal Y is transmitted to the first relay, and the first relay generates a valid signal X according to the total door lock signal Y and inputs it to the PLC controller. The PLC controller generates a mobile trolley control signal Q according to the received valid signal X and the cigarette pack detection signal, the cigarette pack type signal, combined with the operation status signal and the production status signal, and transmits it to the second relay. The second relay controls the operation of the mobile trolley according to the control signal Q.

[0015] In a further technical solution, the operation logic of the control signal Q is:

[0016] Control signal Q = operation status signal of the current process × current production status signal × cigarette pack type signal × cigarette pack detection signal × effective signal X;

[0017] Among them, the running status signal is 1 when it is automatic and 0 when it is non-automatic;

[0018] The production status signal is 1 when it is in production status and 0 when it is not in production status;

[0019] The cigarette pack type signal is 1 when it is thin tobacco leaves, and 0 when it is thin tobacco leaves;

[0020] The cigarette packet detection signal takes the value 1 when a cigarette packet is detected, otherwise it takes the value 0;

[0021] The effective signal X is a signal generated by the first relay according to the door lock total signal Y. When Y=1, X=1, and when Y=0, X=0. Y is the result of the door lock state signals of the four small doors after AND gate logic processing.

[0022] In a further technical solution, the touch screen is also used to generate a touch screen safety trigger point signal and transmit it to the control module; wherein the safety trigger point signal defaults to 1 and becomes 0 after being triggered; the control module is used to receive a door lock status signal, a cigarette pack detection signal, a cigarette pack type signal, a position signal and a touch screen safety trigger point signal, and generate a mobile trolley control signal in combination with an operation status signal and a production status signal; wherein the operation logic of the mobile trolley control signal Q is:

[0023] Control signal Q = operation status signal of the current process × current production status signal × cigarette pack type signal × cigarette pack detection signal × valid signal X × safety trigger point signal;

[0024] The safety trigger point signal takes the value of 0 when it is detected, and takes the value of 1 otherwise.

[0025] In a further technical solution, the system further comprises:

[0026] The mobile trolley limit sensors are respectively arranged at the head and tail ends of the track, that is, at one end of the track close to the tobacco leaf logistics channel and the other end of the track close to the thin leaf logistics channel, and are used to detect whether the mobile trolley has reached the limit position, generate a position signal and transmit it to the control module; the control module is used to receive the door lock status signal, the cigarette pack detection signal, the cigarette pack type signal, the position signal and the touch screen safety trigger point signal, and generate the mobile trolley control signal in combination with the operation status signal and the production status signal;

[0027] The position signal close to the tobacco leaf logistics channel is called the first position signal, and the position signal close to the thin leaf logistics channel is called the second position signal. The conditions for the forward and reverse running of the mobile carriage are:

[0028] Forward running condition = the running state signal of the current process section is the automatic state × the current production state signal is the production state × the cigarette pack type signal is the thin tobacco leaf × there is a cigarette pack detection signal × the first position signal is detected × there is no safety trigger point signal;

[0029] Reverse operation conditions = the operation status signal of the current process section is the automatic state × the current production status signal is the production state × the cigarette pack type signal is thin tobacco leaves × there is a cigarette pack detection signal × the second position signal is detected × there is no safety trigger point signal.

[0030] According to a further technical solution, the door lock is a magnetic door lock, and the magnetic electromagnetic door lock is electrically connected to a proximity switch; the magnetic electromagnetic door lock is used to open and lock the door lock according to a door lock control signal;

[0031] The motor of the mobile trolley is provided with a motor sensor for detecting the operating state of the motor of the mobile trolley;

[0032] The PLC controller is used to generate a door lock control signal according to the operating status signal of the mobile trolley motor, the mobile trolley control signal, the cigarette pack detection signal, the cigarette pack type signal, and the mobile trolley position signal.

[0033] Furthermore, the operation logic of the door lock control signal is:

[0034] Door lock control signal = operation status signal of the current process × current production status signal × mobile trolley control signal Q × cigarette pack type signal × cigarette pack detection signal × mobile trolley motor operation status signal × mobile trolley position signal;

[0035] Among them, when the door lock control signal is 1, the door lock is locked, and when the signal is 0, the door lock is opened;

[0036] The running status signal is 1 when it is automatic and 0 when it is not automatic;

[0037] The production status signal is 1 when it is in production status and 0 when it is not in production status;

[0038] The cigarette pack type signal is 1 when it is thin tobacco leaves, and 0 when it is thin tobacco leaves;

[0039] The cigarette packet detection signal takes the value 1 when a cigarette packet is detected, otherwise it takes the value 0;

[0040] The running status signal of the mobile car motor is 1 when running and 0 when braking;

[0041] The mobile car position signal takes 1 when it is detected to be in the limit position, otherwise it takes 0.

[0042] A second aspect of the present invention provides a tobacco shred material channel safety protection control method.

[0043] A tobacco leaf shred material channel safety protection control method is implemented based on a tobacco leaf shred material channel safety protection system proposed in the first aspect, and the method comprises:

[0044] The safety protection device is set on the periphery of the mobile trolley and its track. The safety protection device is a closed frame guardrail net, and a small door is opened on each side of the frame guardrail net. Each small door is equipped with a proximity switch and a door lock. The proximity switch is used to

[0045] Real-time detection of the open and locked state of each small door lock on the safety protection device, the cigarette package and cigarette package type transmitted to the mobile vehicle, and the generation of door lock state signal, cigarette package detection signal and cigarette package type signal respectively;

[0046] Generate a mobile trolley control signal and a door lock control signal according to the detected door lock status signal, cigarette package detection signal, cigarette package type signal, and combined with the operation status signal and production status signal;

[0047] According to the mobile trolley control signal and the door lock control signal, the operation and braking of the mobile trolley and the opening and locking of the door lock are controlled respectively.

[0048] Further technical solutions include:

[0049] Before generating the mobile trolley control signal and the door lock control signal, obtain the cigarette pack type selection signal generated by the touch screen, compare and verify the cigarette pack type selection signal with the cigarette pack type signal, and generate a process start signal and a process stop signal according to the verification result; wherein, the comparison and verification is: when the cigarette pack types in the cigarette pack type selection signal and the cigarette pack type signal are the same, the verification is successful and the process start signal is generated; otherwise, the verification fails and the process stop signal is generated;

[0050] Generate mobile trolley control signal and door lock control signal according to process start signal;

[0051] According to the process stop signal, the current process is stopped and an alarm is issued.

[0052] One or more of the above technical solutions have the following beneficial effects:

[0053] 1. The present invention proposes a safety protection system and a safety protection control method for a tobacco leaf silk-making material channel. In view of the problem that there are safety risks when a mobile cart moves on a track between a main channel and a thin-sheet channel in the tobacco leaf processing link of a tobacco leaf silk-making workshop, a safety protection device is arranged on the periphery of the mobile cart and its track, and an automatic control method for opening and locking a door lock on the device and for the operation of the mobile cart is arranged. Automatic control of the operation of the mobile cart when the door lock is locked and the braking when the door lock is opened is realized from the software and hardware levels, thereby improving the safety of operation.

[0054] 2. The tobacco silk material channel safety protection system proposed in the present invention adopts a combination of hardware and software. On the one hand, by setting up a variety of hardware devices, for example, two types of relays, OMRON relays and PHOENIX relays, are used to respectively input information into the PLC controller and execute the PLC output results, so as to further simplify the processing in logic control. On the other hand, at the software level, a variety of influencing factors are considered to carry out joint control of the mobile cart and the door lock, so that the small door lock is locked when the mobile cart is running during the execution of the process, avoiding the safety risks caused by the staff entering by mistake, and automatically controlling the braking of the mobile cart when the door lock is opened by mistake. In the face of unexpected situations, the mobile cart can be braked by manually triggering the safety trigger point, thereby improving the safety of operation and ensuring the life safety of the workers and the equipment safety of the mobile cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0056] Figure 1 It is a schematic diagram of the material advancing process in the blade link in the prior art;

[0057] Figure 2 Schematic diagram of a tobacco shred material channel safety protection system in an embodiment of the present invention;

[0058] Figure 3 Schematic diagram of the principle of an OMRON relay in an embodiment of the present invention;

[0059] Figure 4 Schematic diagram of the principle of the PHOENIX relay in an embodiment of the present invention;

[0060] Figure 5 It is a schematic diagram of controlling a mobile trolley and a magnetic door lock in an embodiment of the present invention;

[0061] Figure 6 Schematic diagram of signal flow in a control module in an embodiment of the present invention;

[0062] Figure 7 It is a logic diagram of the operation control of the mobile vehicle in an embodiment of the present invention;

[0063] Figure 8 Schematic diagram of signal transmission during the operation control of the mobile vehicle in an embodiment of the present invention. DETAILED DESCRIPTION

[0064] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Embodiment 1

[0067] This embodiment proposes a tobacco leaf shred material channel safety protection system. Figure 2As shown, the system includes a safety protection device arranged on the periphery of the mobile trolley and its track. The safety protection device is a rectangular closed frame fence net, and a small door is opened on each side of the frame fence net. Each small door is installed with a proximity switch and a magnetic door lock (also referred to as a magnetic door lock). The magnetic electromagnetic door lock is used to open and lock the door lock according to the door lock control signal. The proximity switch is electrically connected to the magnetic electromagnetic door lock and is used to detect the opening and locking state of the door lock. When the small door is closed, the proximity switch generates a signal, and the proximity switch generates a digital signal 1. When the small door is opened, the proximity switch does not generate a signal, and the proximity switch generates a digital signal 0. Further, the tobacco silk material channel safety protection system also includes:

[0068] A photoelectric tube and a barcode scanner are arranged at the material receiving port of the mobile trolley. The photoelectric tube is used to detect the cigarette packs transmitted to the mobile trolley in real time and generate a cigarette pack detection signal; the barcode scanner is used to detect the type of the cigarette packs transmitted to the mobile trolley and generate a cigarette pack type signal;

[0069] The mobile trolley limit sensors are respectively arranged at the head and tail ends of the track, that is, at one end of the track close to the tobacco leaf logistics channel and at one end of the track close to the thin leaf logistics channel, for detecting whether the mobile trolley has reached the limit position and generating a position signal;

[0070] The remote control terminal includes a touch screen and a control module; wherein:

[0071] A touch screen, used to generate a touch screen safety trigger point signal;

[0072] The control module includes a logic control circuit, a first relay, a PLC controller, and a second relay that are electrically connected in sequence, and is used to receive a door lock status signal, a cigarette pack detection signal, a cigarette pack type signal, a position signal, and a touch screen safety trigger point signal, and combine the operation status signal and the production status signal to generate a mobile car control signal and a door lock control signal.

[0073] Through the combination of the above-mentioned hardware + software design, a proximity switch is used to detect the switch status of each guardrail net small door lock, and the switch status is uploaded to the remote control terminal. At the same time, a photoelectric tube arranged at the material receiving port of the mobile trolley is used to detect in real time whether there is a cigarette pack transmitted to the mobile trolley, and a barcode scanner is used to scan the barcode on the cigarette pack to obtain the cigarette pack type (including tobacco leaves and thin leaves). The cigarette pack detection signal and the cigarette pack type signal are also uploaded to the remote control terminal. The control module of the remote control terminal performs logic analysis of the signal to generate a mobile trolley control signal and a door lock control signal to control the operation of the mobile trolley on the track and the continuous locking state of each guardrail net small door lock.

[0074] First of all, it should be made clear that the remote control terminal is connected to the control system of the general process of tobacco leaf processing, and the operation status signal and production status signal of this process segment can be obtained. Specifically, the operation status signal is obtained by detecting the segment control signal of this process segment, and the operation status signal including automatic operation and manual operation is generated according to the segment control signal; the production status signal is obtained by detecting the line control signal, and the production status signal including production status and non-production status is generated according to the line control signal. Among them, the segment control signal refers to the control signal of this process segment, and the line control refers to the control signal of the integrated multi-process such as the leaf processing line and the leaf silk processing line. Both the segment control and the line control communicate with the PLC controller of this process segment through the PROFINET network, and then in the whole process, the control module can obtain the operation status signal and production status signal of this process segment. In this embodiment, the automatic operation state of the operation status signal is 1, the manual operation state is 0, and the production state of the production status signal is 1 and the non-production state is 0.

[0075] Furthermore, by means of a photoelectric tube and a barcode scanner arranged at the material receiving port of the mobile trolley, the cigarette packs transmitted to the mobile trolley are detected in real time, a cigarette pack detection signal is generated, and the barcode on the cigarette pack is scanned by the barcode scanner to obtain the cigarette pack type (including tobacco leaves and thin leaves), and a cigarette pack type signal is generated, and then the cigarette pack detection signal and the cigarette pack type signal are uploaded to the remote control terminal. In fact, in the above-mentioned process of transmitting cigarette packs, it is necessary to first determine the selected cigarette pack type through the touch screen of the remote control terminal, and then automatically transmit the corresponding type of cigarette packs. Therefore, in order to ensure the subsequent accurate tobacco leaf processing technology, in this embodiment, the control module (PLC controller) of the remote control terminal receives the cigarette pack type selection signal generated by the touch screen, and verifies it according to the received cigarette pack type signal. When the cigarette pack types of the two signals are the same, it is judged that the current process is correct and the next step is performed. Otherwise, an alarm is issued and the current process is terminated.

[0076] When the current process is detected to be correct, the control module of the remote control terminal performs comprehensive logical judgment based on the multiple signals received to generate a mobile trolley control signal and a door lock control signal to control the automatic operation of the mobile trolley and the door lock status.

[0077] In this embodiment, for the control module, a logic control circuit, a first relay (OMRON relay), a PLC controller, and a second relay (PHOENIX relay) are arranged to be electrically connected in sequence, and two types of relays are used to respectively input information into the PLC controller and execute the PLC output result, so as to further simplify the processing in the logic control. Through the above settings, the obtained multiple signals are logically analyzed and processed to achieve that when the mobile car is controlled to run, the four small doors are kept in a locked state, and once any one or more of the four small doors are opened, the mobile car stops running, protecting the safety of the operator entering it.

[0078] like Figure 5 As shown, the above logic control circuit is an AND gate circuit, which uses the AND gate idea to process multiple signals (i.e., the door lock status signal of each small door). Specifically, the safety protection device of the mobile car has a total of four small doors, which are convenient for the continuity of the material production process. The layout of the safety protection device is as follows Figure 2 As shown, four proximity switches are installed on the four small doors respectively, and the four proximity switches output door lock status signals respectively. By using the AND gate idea to process the signal information, the door opening information can be quickly judged, and the simple processing purpose of multiple signals can be achieved, which is convenient for the simplicity of subsequent PLC program logic processing.

[0079] The AND gate circuit is a circuit that implements the logical "multiplication" operation. It has more than two input terminals and one output terminal (general circuits have only one output terminal, while ECL circuits have two output terminals). When all input terminals are high level (logical "1"), the output of the circuit is high level (logical "1"), otherwise the output is low level (logical "0"). The logic of the AND gate can be expressed as: Y=A·B. The truth table of the AND gate is shown in Table 1 below.

[0080] Table 1 AND gate truth table

[0081]

[0082] In this embodiment, the proximity switch signals (i.e., door lock status signals) on the four small doors of the safety protection device are collected, and the four signals are aggregated into a PLC input signal through an AND gate circuit, so as to realize the function that the PLC input signal is disconnected when only one signal is disconnected. Specifically, the signals of the four small doors are respectively identified by A, B, C, and D, and the logic of the AND gate circuit is borrowed to use a four-input AND gate logic control circuit to process the input signals of the four small doors.

[0083] According to the above truth table, the truth table of the four-input AND gate logic circuit has an output of 1 only when all four signals are 1, and 0 in other cases. Therefore, the formula of the four-input AND gate is:

[0084] Y=A·B·C·D

[0085] After the signals of the four small gates are processed by AND gate logic, it can be achieved that Y=1 only when the four small gates are closed, and Y=0 in other cases.

[0086] Furthermore, a relay is an electrical control device, which is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches the specified requirements. It has an interactive relationship between the control system (also called the input circuit) and the controlled system (also called the output circuit). This embodiment uses two different types of intermediate relays, namely the OMRON intermediate relay and the PHOENIX intermediate relay. Different types of relays are used to distinguish input signals and output signals, which is convenient for quick judgment when repairing equipment and troubleshooting.

[0087] Furthermore, after the door lock status signals of the four small doors pass through the AND gate logic control circuit, a total door lock signal Y is generated, and the total door lock signal Y is transmitted to the first relay (i.e., the OMRON relay). The first relay generates a valid signal X based on the total door lock signal Y and transmits it to the PLC controller as the input signal of the PLC controller.

[0088] like Figure 3 The schematic diagram of the OMRON relay shown in FIG. 1 is used in this embodiment to use the output of the OMRON relay as the input of the PLC, and the terminals: terminal 13, terminal 14, terminal 5, terminal 9, and terminal 1 are selected for hardware line connection. Among them, terminal 13 is the negative pole, and terminal 14 is the positive pole. In this embodiment, terminal 13 is connected to the negative pole of the 24V power supply, and terminal 14 is connected to the logic output signal Y of the four gate signals, and the logic output Y of the four gates is used as the positive pole of the coil. In OMRON relays, terminals 1, 5, and 9 are a pair of working contacts, and terminals 4, 8, and 12 are a pair of working contacts. These two pairs of contacts work independently and do not affect each other. Terminals 1 and 4 are normally closed points, terminals 5 and 8 are normally open points, and terminals 9 and 12 are common points of terminals 1 and 5 and terminals 4 and 8 respectively. When there is no power (i.e., terminals 13 and 14 are not connected), terminal 9 is energized with terminal 1 and disconnected from terminal 5. When there is power (i.e., terminals 13 and 14 are not connected), terminal 9 is energized with terminal 5 and disconnected from terminal 1. The same applies to terminals 4, 8, and 12.

[0089] Based on the above principle, this embodiment adopts the normally open points of the OMRON relay: terminal 5 and terminal 9, connects terminal 9 to the 24V positive signal, and connects terminal 5 to the PLC input terminal, so that when the four small doors are closed, the logical output signal Y=1 of the four doors can be realized. At this time, the OMRON relay coil is energized, and then the normally open terminal 5 and terminal 9 are closed, and the terminal 5 inputs the digital quantity 1 (i.e., the 24V power supply positive signal) and inputs it into the PLC.

[0090] Furthermore, the effective signal X output by the first relay is input into the PLC controller, and the PLC controller performs logic operations in combination with other received signals to generate a control signal Q. The brake control signal Q is transmitted to the second relay, and the second relay generates a mobile trolley control signal to control the operation of the mobile trolley.

[0091] Specifically, the PLC controller includes a PLC input module and a PLC output module. The PLC input module is used to provide the module channel address of the PLC input to complete the input signal acquisition; the PLC output module is used to provide the module channel address of the PLC output and output the logical operation result in the PLC program. The PLC controller generates a control signal Q based on the received valid signal Y and the cigarette pack detection signal, the cigarette pack type signal, and the operating status signal and the production status signal. The logical operation principle is:

[0092] Control signal Q = operation status signal of the current process section (1 when automatic, 0 when non-automatic) × current production status signal (1 when in production status, 0 when not in production status) × cigarette pack type signal (1 for thin tobacco leaves, 0 for sliced ​​tobacco leaves) × cigarette pack detection signal (1 when detected, otherwise 0) × valid signal X.

[0093] Among them, the effective signal X is a signal generated by the first relay according to the door lock total signal Y, when Y=1, X=1, when Y=0, X=0; Y is the result of the door lock state signals of the four small doors after AND gate logic processing.

[0094] After the PLC controller outputs the control signal Q, the control signal is input to the second relay. In this embodiment, the second relay adopts a PHOENIX relay, and its principle is as follows: Figure 4 As shown, take the terminals: terminal A1, terminal A2, terminal 11, terminal 12, terminal 14 as an example, terminal A1 and terminal A2 are coils, terminal 11 and terminal 12 are normally closed points, in this embodiment, terminal A1 is connected to the control signal Q output by the PLC controller, and terminal A2 is connected to the negative pole of the 24V power supply; when the coil is not powered, terminal 11 and terminal 12 are normally closed, terminal 11 and terminal 14 are normally open, and when the coil is powered, terminal 11 and terminal 12 are disconnected, and terminal 11 and terminal 14 are energized. Based on the above principle, terminal 11 is connected to the operation control end of the mobile trolley, and terminal 14 is connected to the start condition of the mobile trolley motor operation, so as to control the operation and braking of the mobile trolley.

[0095] The circuit diagram based on the above settings is as follows Figure 6As shown, the input module of the PLC controller includes modules 1, 2, and 3, namely, the first input channel, the second input channel, and the third input channel of the PLC controller, and its output module includes modules 1, 2, and 3, namely, the first output channel, the second output channel, and the third output channel of the PLC controller. The input and output channels in the PLC controller are both provided with multiple channels, and each channel only receives variables of the same type. For example, the first input channel only receives signals from four small doors, and the second input channel only receives signals from OMRON relays, and the output channel is similar, thereby ensuring that variables of different types will not affect each other.

[0096] Through the control logic of the above software part, it can be achieved:

[0097] (1) The mobile vehicle operates normally

[0098] When the four small doors are closed, that is, A=1, B=1, C=1, and D=1, the logical operation formula of the door is Y=A·B·C·D, and Y=1 is calculated. Y=1 is input into the first relay, and the first relay generates a valid signal X=1 and inputs it into the PLC controller. The PLC controller obtains the output control signal Q after logical operation. At this time, the signal Q=1 energizes the coil of the PHOENIX relay. After energization, the normally closed point of the PHOENIX relay is disconnected, that is, terminals 11 and 12 are disconnected, and terminals 11 and 14 are energized. At this time, the motor of the mobile car starts to run, that is, the mobile car is controlled to run. At this time, there is no braking signal, and the mobile car can run normally.

[0099] (2) The mobile vehicle stops running

[0100] When any of the four small doors is opened, the logical operation formula of the door Y=A·B·C·D is used to calculate Y=0, and Y=0 is input into the first relay. At this time, the terminal 14 of the OMRON relay obtains the digital value 0, so the coil in the OMRON relay is not energized, and then the normally open terminal 5 and terminal 9 continue to be in the disconnected state, and it has no output signal or the output valid signal X=0, and then the input of the PLC controller is 0. At this time, the output of the PLC controller is Q=0, and Q=0 makes the terminal A1 of the PHOENIX relay have no signal, that is, the coil of the PHOENIX relay is not energized, the normally closed terminal 11 and terminal 12 of the PHOENIX relay are in the closed state, and the terminal 11 and terminal 14 are in the disconnected state, and then the motor of the mobile trolley has no starting condition, and the mobile trolley enters the braking state and stops running.

[0101] Integrating the above logic control scheme, the operating conditions of the mobile car are:

[0102] The operating conditions of the mobile car = the operating status signal of the current process section is the automatic state × the current production status signal is the production state × the cigarette package type signal is thin tobacco leaves × there is a cigarette package detection signal.

[0103] As a real-time method, on the basis of the above control program, a screen guarantee for the safety protection of the mobile trolley is established, and the input and output points of the program are used to establish the safety trigger point of the touch screen of the on-site operator and the trigger point of the control room operation screen. Specifically, the touch screen safety trigger point signal is added to the operating conditions of the mobile trolley, and the touch screen safety trigger point signal is serially connected to the forward and reverse operations of the mobile trolley. In this embodiment, a safety trigger point is set and displayed on the touch screen of the remote control terminal, and a new safety protection button is established on the touch screen using the safety trigger point. Preferably, a new safety trigger point button can be established on the touch screen of the two processes of the on-site post and the control room, respectively. Based on the above settings, when an emergency occurs, the operator or the control room presses the safety trigger point button, and the mobile trolley stops running, that is: the mobile trolley runs → encounters an emergency → the operator / control room presses the button → the mobile trolley stops running. These trigger point signals are transmitted in parallel to the PLC controller. In fact, these signals are all the same variable, so the two processes can act independently, thereby improving the safety of production.

[0104] Furthermore, the safety trigger point is the screen button on the post touch screen and the central control touch screen, which is triggered by clicking with a computer mouse or manual touch. After the trigger, the safety trigger point signal becomes 0. Its implementation at the software level is to create a button on the original screen through the screen INTOUCH software, define the button as a safety trigger point, and the default state is 1. After clicking, the state becomes 0. Based on the above settings, the operation logic of the control signal Q of the mobile car is:

[0105] Control signal Q = operation status signal of the current process × current production status signal × cigarette pack type signal × cigarette pack detection signal × valid signal X × safety trigger point signal;

[0106] The safety trigger point signal takes the value of 0 when it is detected, and takes the value of 1 otherwise.

[0107] Preferably, the PLC controller also receives a position signal of the mobile vehicle, which can be divided into two categories: a first position signal close to the tobacco leaf logistics channel, and a second position signal close to the thin leaf logistics channel, such as Figure 7As shown, the position signal is integrated into the above logic operation principle, and the current running direction of the trolley is determined according to the position signal of the trolley. For example, when the trolley is detected to be located near the main channel, the first position signal is assigned a value of "1", and the PLC controller generates a forward running control signal; when the trolley is detected to be located near the thin leaf channel, the second position signal is assigned a value of "1", and the PLC controller generates a reverse running control signal. That is, the conditions for the forward and reverse running of the trolley are:

[0108] (1) Forward operation condition = the operation state signal of the current process is the automatic state × the current production state signal is the production state × the cigarette pack type signal is the thin tobacco leaf × there is a cigarette pack detection signal × the first position signal;

[0109] (2) Reverse operation condition = the operation status signal of the current process section is the automatic state × the current production status signal is the production state × the cigarette pack type signal is thin tobacco leaves × there is a cigarette pack detection signal × the second position signal.

[0110] The safety trigger points set above are connected in series to the forward / reverse running conditions of the mobile car, and its operation logic is as follows:

[0111] (1) Forward operation condition = the operation state signal of the current process is automatic state × the current production state signal is production state × the cigarette pack type signal is thin tobacco leaves × there is a cigarette pack detection signal × the first position signal × the safety trigger point signal (the default is 1, which becomes 0 after triggering);

[0112] (2) Reverse operation conditions = the operation status signal of the current process section is automatic status × the current production status signal is production status × the cigarette pack type signal is thin tobacco leaves × there is a cigarette pack detection signal × the second position signal × the safety trigger point signal (the default is 1, which becomes 0 after triggering).

[0113] Preferably, the above situation is also applicable to a method for stopping the movement of the mobile vehicle after encountering an emergency when the guardrail door of the mobile vehicle is still in a closed state.

[0114] As another implementation method, the control module of the remote control terminal also generates a door lock control signal, and sends the final generated mobile trolley control signal and door lock control signal to the mobile trolley and door lock respectively, so as to realize the linkage control of the mobile trolley and door lock. That is, during the automatic operation of the tobacco leaf silk making process and the normal production process, the mobile trolley is controlled to operate normally and all door locks are locked. When an operator opens the door lock of a small door, the mobile trolley can be automatically controlled to brake, so as to ensure the safety of the staff.

[0115] Furthermore, a motor sensor is provided on the motor of the mobile trolley to detect the operating state of the motor of the mobile trolley; the PLC controller is used to generate a door lock control signal according to the operating state signal of the motor of the mobile trolley, the control signal of the mobile trolley, the cigarette pack detection signal, the cigarette pack type signal, and the position signal of the mobile trolley. In simple terms, when the control signal of the mobile trolley is in the operating state, the door lock control signal generated is locked; conversely, when the control signal of the mobile trolley is in the braking state, the door lock control signal generated is opened; the generated door lock control signal is sent down to the magnetic door lock, and the magnetic door lock is locked and opened according to the signal. In this embodiment, the magnetic door lock used is composed of a fixed part and a movable part, wherein the fixed part of the door lock is installed on the fixed guardrail of the small door of the mobile trolley guardrail, and the movable part of the door lock is installed on the door of the small door of the mobile trolley guardrail. When the small door of the guardrail is closed, the fixed part is connected to the 24V power supply, and the two parts of the magnetic door lock can be tightly fitted.

[0116] The control circuit of the magnetic door lock used above has the following control logic:

[0117] Door lock control signal (locked when the signal is 1, open when the signal is 0) = operation status signal of the current process section × current production status signal × mobile trolley control signal Q × cigarette pack type signal (1 for thin tobacco leaves, 0 for tobacco leaves) × cigarette pack detection signal (1 when detected, otherwise 0) × mobile trolley control signal (the state is 1 when the electrode is running) × mobile trolley position signal (1 when not in the limit position, otherwise 0).

[0118] Based on the above control logic, when the door lock control signal is 1, the door lock is locked, and when the signal is 0, the door lock is opened. That is, in the non-production state, the magnetic door lock has no signal, and the door lock is in a power-off state. The guardrail door of the mobile trolley can be opened and closed at will; in the production state, such as Figure 8 As shown, all small doors are in a locked state. When a thin cigarette pack is detected to be transferred to the mobile trolley and the mobile trolley starts to move, the PLC controller outputs a door lock control signal, that is, a 24V signal, and sends the signal to the magnetic door lock as the power supply of the magnetic door lock, so that the magnetic door lock is in a working state, generates magnetic attraction, and magnetically attracts the guardrail small door.

[0119] Finally, the guardrail installed around the mobile car is painted red to strengthen the warning; the proximity switch and magnetic door lock are installed on the four small doors of the guardrail; the OMRON relay is connected to the substation box on site and wired, and the wire of the proximity switch is connected to the OMRON relay; the PHOENIX relay is connected to the substation box on site and the output signal is connected; the PLC input signal is connected to the PLC input module. Through the above hardware and software design, the proximity switch signals of the four small doors of the guardrail are all included in the PLC input module of the substation box. After the rectification and wiring of the entire line are completed, the written PLC program is compiled into the entire blade segment program ZS1 for application; through the above system, the safety of operators can be greatly improved, and the life safety of employees and the equipment safety of the mobile car can be guaranteed.

[0120] Embodiment 2

[0121] This embodiment proposes a tobacco leaf shred material channel safety protection control method, which is implemented based on a tobacco leaf shred material channel safety protection system proposed in Embodiment 1. The method includes:

[0122] The safety protection device is set on the periphery of the mobile trolley and its track. The safety protection device is a closed frame guardrail net, and a small door is opened on each side of the frame guardrail net. Each small door is equipped with a proximity switch and a door lock. The proximity switch is used to

[0123] Real-time detection of the open and locked state of each small door lock on the safety protection device, the cigarette package and cigarette package type transmitted to the mobile vehicle, and the generation of door lock state signal, cigarette package detection signal and cigarette package type signal respectively;

[0124] Generate a mobile trolley control signal and a door lock control signal according to the detected door lock status signal, cigarette package detection signal, cigarette package type signal, and combined with the operation status signal and production status signal;

[0125] According to the mobile trolley control signal and the door lock control signal, the operation and braking of the mobile trolley and the opening and locking of the door lock are controlled respectively.

[0126] Furthermore, before generating the mobile trolley control signal and the door lock control signal, the cigarette pack type selection signal generated by the touch screen is obtained, the cigarette pack type selection signal is compared and verified with the cigarette pack type signal, and a process start signal and a process stop signal are generated according to the verification result; wherein, the comparison and verification is: when the cigarette pack types in the cigarette pack type selection signal and the cigarette pack type signal are the same, the verification is successful and the process start signal is generated; otherwise, the verification fails and a process stop signal is generated;

[0127] Generate mobile trolley control signal and door lock control signal according to process start signal;

[0128] According to the process stop signal, the current process is stopped and an alarm is issued.

[0129] The steps involved in the above embodiment 2 correspond to those in embodiment 1. For the specific implementation method, please refer to the relevant description part of embodiment 1, which will not be repeated here.

[0130] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A tobacco leaf shred material channel safety protection system, characterized in that: include: A safety protection device is arranged on the periphery of the mobile trolley and its track. The safety protection device is a closed frame guardrail net, and a small door is opened on each side of the frame guardrail net. Each small door is equipped with a proximity switch and a door lock. The proximity switch is used to detect the opening and locking status of the door lock; A photoelectric tube and a barcode scanner are arranged at the material receiving port of the mobile trolley, wherein the photoelectric tube is used to detect the cigarette packs transmitted to the mobile trolley in real time and generate a cigarette pack detection signal; the barcode scanner is used to detect the type of the cigarette packs transmitted to the mobile trolley and generate a cigarette pack type signal; The remote control terminal includes a control module; the control module is used to receive a door lock status signal, a cigarette pack detection signal, and a cigarette pack type signal, and generate a mobile trolley control signal and a door lock control signal in combination with an operation status signal and a production status signal.

2. A tobacco leaf shred material channel safety protection system as claimed in claim 1, characterized in that: The remote control terminal further comprises a touch screen, and the touch screen is used to generate a cigarette pack type selection signal; The control module includes a logic control circuit, a first relay, a PLC controller, and a second relay that are electrically connected in sequence; the PLC controller is used to compare and verify the cigarette package type selection signal generated by the touch screen with the cigarette package type signal generated by the barcode scanner, and generate a process start signal and a process stop signal according to the verification result; wherein, the comparison and verification is: when the cigarette package types in the cigarette package type selection signal and the cigarette package type signal are the same, the verification is successful and a process start signal is generated; otherwise, the verification fails, a process stop signal is generated and an alarm is issued.

3. A tobacco leaf shred material channel safety protection system as claimed in claim 2, characterized in that: The logic control circuit adopts an AND gate logic circuit. The door lock status signals of multiple small doors generate a total door lock signal Y after passing through the AND gate logic circuit. The total door lock signal Y is transmitted to the first relay. The first relay generates a valid signal X according to the total door lock signal Y and inputs it to the PLC controller. The PLC controller generates a mobile trolley control signal Q according to the received valid signal X and the cigarette package detection signal, the cigarette package type signal, combined with the operation status signal and the production status signal, and transmits it to the second relay. The second relay controls the operation of the mobile trolley according to the control signal Q.

4. A tobacco leaf shred material channel safety protection system as claimed in claim 3, characterized in that: The operation logic of the control signal Q is: Control signal Q = operation status signal of the current process × current production status signal × cigarette pack type signal × cigarette pack detection signal × effective signal X; Among them, the running status signal is 1 when it is automatic and 0 when it is non-automatic; The production status signal is 1 when it is in production status and 0 when it is not in production status; The cigarette pack type signal is 1 when it is thin tobacco leaves, and 0 when it is thin tobacco leaves; The cigarette packet detection signal takes the value 1 when a cigarette packet is detected, otherwise it takes the value 0; The effective signal X is a signal generated by the first relay according to the door lock total signal Y. When Y=1, X=1, and when Y=0, X=0. Y is the result of the door lock state signals of the four small doors after AND gate logic processing.

5. A tobacco leaf shred material channel safety protection system as claimed in claim 3, characterized in that: The touch screen is also used to generate a touch screen safety trigger point signal and transmit it to the control module; wherein the safety trigger point signal defaults to 1 and becomes 0 after being triggered; the control module is used to receive the door lock status signal, the cigarette pack detection signal, the cigarette pack type signal, the position signal and the touch screen safety trigger point signal, and generate a mobile trolley control signal in combination with the operation status signal and the production status signal; wherein the operation logic of the mobile trolley control signal Q is: Control signal Q = operation status signal of the current process × current production status signal × cigarette pack type signal × cigarette pack detection signal × valid signal X × safety trigger point signal; The safety trigger point signal takes the value of 0 when it is detected, and takes the value of 1 otherwise.

6. A tobacco leaf shred material channel safety protection system as claimed in claim 5, characterized in that: The system further comprises: The mobile trolley limit sensors are respectively arranged at the head and tail ends of the track, that is, at one end of the track close to the tobacco leaf logistics channel and the other end of the track close to the thin leaf logistics channel, and are used to detect whether the mobile trolley has reached the limit position, generate a position signal and transmit it to the control module; the control module is used to receive the door lock status signal, the cigarette pack detection signal, the cigarette pack type signal, the position signal and the touch screen safety trigger point signal, and generate the mobile trolley control signal in combination with the operation status signal and the production status signal; The position signal close to the tobacco leaf logistics channel is called the first position signal, and the position signal close to the thin leaf logistics channel is called the second position signal. The conditions for the forward and reverse running of the mobile carriage are: Forward running condition = the running state signal of the current process section is the automatic state × the current production state signal is the production state × the cigarette pack type signal is the thin tobacco leaf × there is a cigarette pack detection signal × the first position signal is detected × there is no safety trigger point signal; Reverse operation conditions = the operation status signal of the current process section is the automatic state × the current production status signal is the production state × the cigarette pack type signal is thin tobacco leaves × there is a cigarette pack detection signal × the second position signal is detected × there is no safety trigger point signal.

7. A tobacco leaf shred material channel safety protection system as claimed in claim 1, characterized in that: The door lock is a magnetic door lock, and the magnetic electromagnetic door lock is electrically connected to the proximity switch; the magnetic electromagnetic door lock is used to open and lock the door lock according to the door lock control signal; The motor of the mobile trolley is provided with a motor sensor for detecting the operating state of the motor of the mobile trolley; The PLC controller is used to generate a door lock control signal according to the operating status signal of the mobile trolley motor, the mobile trolley control signal, the cigarette pack detection signal, the cigarette pack type signal, and the mobile trolley position signal.

8. A tobacco leaf shred material channel safety protection system as claimed in claim 7, characterized in that: The operation logic of the door lock control signal is: Door lock control signal = operation status signal of the current process × current production status signal × mobile trolley control signal Q × cigarette pack type signal × cigarette pack detection signal × mobile trolley motor operation status signal × mobile trolley position signal; Among them, when the door lock control signal is 1, the door lock is locked, and when the signal is 0, the door lock is opened; The running status signal is 1 when it is automatic and 0 when it is not automatic; The production status signal is 1 when it is in production status and 0 when it is not in production status; The cigarette pack type signal is 1 when it is thin tobacco leaves, and 0 when it is thin tobacco leaves; The cigarette packet detection signal takes the value 1 when a cigarette packet is detected, otherwise it takes the value 0; The running status signal of the mobile car motor is 1 when running and 0 when braking; The mobile car position signal takes 1 when it is detected to be in the limit position, otherwise it takes 0.

9. A tobacco leaf shred material channel safety protection control method, characterized in that: A tobacco shred material channel safety protection system according to any one of claims 1 to 8 is implemented, the method comprising: The safety protection device is set on the periphery of the mobile trolley and its track. The safety protection device is a closed frame guardrail net, and a small door is opened on each side of the frame guardrail net. Each small door is equipped with a proximity switch and a door lock. The proximity switch is used to Real-time detection of the open and locked state of each small door lock on the safety protection device, the cigarette package and cigarette package type transmitted to the mobile vehicle, and the generation of door lock state signal, cigarette package detection signal and cigarette package type signal respectively; Generate a mobile trolley control signal and a door lock control signal according to the detected door lock status signal, cigarette package detection signal, cigarette package type signal, and combined with the operation status signal and production status signal; According to the mobile trolley control signal and the door lock control signal, the operation and braking of the mobile trolley and the opening and locking of the door lock are controlled respectively.

10. A tobacco leaf shred material channel safety protection control method as claimed in claim 9, characterized in that: Also includes: Before generating the mobile trolley control signal and the door lock control signal, obtain the cigarette pack type selection signal generated by the touch screen, compare and verify the cigarette pack type selection signal with the cigarette pack type signal, and generate a process start signal and a process stop signal according to the verification result; wherein, the comparison and verification is: when the cigarette pack types in the cigarette pack type selection signal and the cigarette pack type signal are the same, the verification is successful and the process start signal is generated; otherwise, the verification fails and the process stop signal is generated; Generate mobile trolley control signal and door lock control signal according to process start signal; According to the process stop signal, the current process is stopped and an alarm is issued.

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