Tobacco shred sequential feeding system of cigarette making and tipping unit and control method

Abstract

The invention relates to the technical field of tobacco shred feeding, and provides a tobacco shred sequential feeding system of a cigarette making and tipping unit and a control method. The cigarette making and tipping unit tobacco shred timing sequence feeding system comprises a master station PLC and slave station PLCs, and the slave station PLCs are connected through a network communication protocol bus. In the single-machine mode, the master station PLC and the slave station PLC independently control a tobacco shred feeding block valve of the cigarette making and tipping unit to act and a flashboard to release a signal according to a tobacco shred feeding block valve signal and a tobacco shred cavity full material signal of the cigarette making and tipping unit which are respectively collected; in the online mode, the master station PLC and all the slave station PLCs collect tobacco shred requirement material block valve signals and tobacco shred cavity full material signals of the respective cigarette making and tipping machine sets, all the slave station PLCs send all the collected signals to the master station PLC, so that the master station PLC carries out queuing processing on all the signals, after processing, the tobacco shred requirement material block valves of the cigarette making and tipping machine sets are controlled to act, and flashboards release the signals.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco feeding, and in particular to a tobacco sequential feeding system and control method for a tobacco rolling and splicing unit. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, the rolling and splicing unit is a device that processes raw and auxiliary materials such as tobacco, cigarette paper, tipping paper, and filter tips into qualified cigarettes. For the supply of tobacco, the industry generally adopts wind-powered wire feeding to absorb tobacco from the wire feeder. The rolling and splicing unit has two feeding methods: individual feeding and group feeding. Individual feeding means that the rolling and splicing unit is only responsible for sucking tobacco, and has no connection with the wire feeder; group feeding means that the rolling and splicing unit sends a material request signal to the wire feeder through the interface, and after the wire feeder confirms and sends a "can request material" signal, the rolling and splicing unit can open the valve to absorb tobacco.

[0004] One wire feeder can be used by several coiling machines. If the wire feeder is not faulty, the "ready to request material" signal can be sent, but sequential request cannot be realized. In addition, the connection between the coiling machine and the wire feeder is a pure wire connection instead of a communication method, which further limits certain functions. In view of the above problems with group feeding, the industry generally adopts a single feeding method.

[0005] No matter the feeding is done individually or in groups, the number of winding and splicing machines that request materials at the same time is uncertain. If multiple winding and splicing machines request materials at the same time, the negative pressure of the wind wire feeding will be reduced, and the negative pressure of other parts of the winding and splicing machine will be affected. The weight control of the winding and splicing machine may be unstable, and the cigarette transfer drum may drop or throw cigarettes due to the reduced negative pressure. Summary of the invention

[0006] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a tobacco rolling machine group timed feeding system and control method. The present invention can collect material request signals of multiple rolling machine groups in the single-group feeding mode of the rolling machine group and perform time-sharing sorting and feeding. Only one rolling machine group is allowed to request material at the same time, and other groups queue up and wait in order, and the cycle repeats.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A first aspect of the present invention provides a tobacco shreds timing feeding system for a tobacco rolling and splicing machine group.

[0009] A tobacco shreds timing feeding system for a tobacco roto-rolling unit, comprising: a master station PLC placed in an electrical cabinet of a tobacco roto-rolling unit, and a plurality of slave station PLCs placed in electrical cabinets of other tobacco roto-rolling units; the master station PLC and the slave station PLCs, and the slave station PLCs and the slave station PLCs are connected by a network communication protocol bus;

[0010] In the stand-alone mode, the master station PLC / slave station PLC independently controls the tobacco material cut-off valve action and gate release signal of the tobacco roto-joining unit according to the tobacco material cut-off valve signal and tobacco cavity full material signal collected by each unit;

[0011] In the online mode, the master station PLC and all slave station PLCs collect the tobacco material cut-off valve signals and tobacco cavity full material signals of their respective rolling and connecting machine groups. All slave station PLCs send all the collected signals to the master station PLC so that the master station PLC queues and processes each signal. After processing, it controls the action of the tobacco material cut-off valves of each rolling and connecting machine group and the gate release signal.

[0012] Furthermore, the circuit structure of the master station PLC and all slave station PLCs are the same.

[0013] Furthermore, a relay isolation protection circuit is provided between the winding and connecting machine group and the master station PLC / slave station PLC.

[0014] Furthermore, isolation relays are provided between the mechanism for generating a shut-off valve signal of the rolling unit and the master station PLC / slave station PLC, between the mechanism for generating a shut-off valve output of the rolling unit and the master station PLC / slave station PLC, between the mechanism for generating a tobacco cavity full signal of the rolling unit and the master station PLC / slave station PLC, and between the mechanism for generating a gate release signal of the rolling unit and the master station PLC / slave station PLC.

[0015] Furthermore, diagnostic relays are provided between the mechanism for generating a shut-off valve signal of the rolling unit and the master station PLC / slave station PLC, between the mechanism for generating a shut-off valve output of the rolling unit and the master station PLC / slave station PLC, between the mechanism for generating a tobacco cavity full signal of the rolling unit and the master station PLC / slave station PLC, and between the mechanism for generating a gate release signal of the rolling unit and the master station PLC / slave station PLC.

[0016] Furthermore, the isolation relay and the diagnostic relay in the same electrical cabinet of the winding and connecting machine group are connected to each other.

[0017] Furthermore, the master station PLC / slave station PLC are both equipped with a touch screen for switching between single machine / online signals, displaying the currently executed rolling machine group, displaying the rolling machine groups in the queue, displaying the material request interval between each rolling machine group, displaying the material request duration, displaying the current remaining time, displaying the tobacco full signal, displaying the shut-off valve signal, displaying the machine number and displaying the queue number.

[0018] Furthermore, the master station PLC / slave station PLC adopts independent power supply mode.

[0019] A second aspect of the present invention provides a method for controlling the timing feeding of tobacco shreds in a tobacco rolling and splicing machine.

[0020] A tobacco sequential feeding control method for a tobacco rolling and splicing group, applied to the tobacco sequential feeding system for the tobacco rolling and splicing group described in the first aspect, comprising:

[0021] If the tobacco roto-joining unit is determined to be in stand-alone mode, the master station PLC / slave station PLC will independently control the tobacco roto-joining unit tobacco cut-off valve action and gate release signal according to the tobacco cut-off valve signal and tobacco cavity full material signal collected by the tobacco roto-joining unit;

[0022] If the tobacco rolling machine is determined to be in online mode, the master station PLC and all slave station PLCs will collect the tobacco material cut-off valve signal and tobacco cavity full signal of their respective tobacco rolling machines, and all slave station PLCs will send all the collected signals to the master station PLC, so that the master station PLC will enter the queue in sequence according to the sequence of signals; generate a queue list; the queue executes the valve action in a first-in-first-out manner; if the valve operation time is reached or the tobacco cavity full signal is triggered, indicating that the current machine has finished loading materials, it will continue to determine whether there are still machines in the queue. If so, it will be executed in the order of the machine queue. Otherwise, re-enter the mode selection to generate a new queue list until the PLC issues a shutdown command and the program stops the loop.

[0023] Furthermore, the signals collected by the master station PLC / slave station PLC need to enter the PLC through the isolation relay and the diagnostic relay respectively. The PLC judges the status of the isolation relay and the diagnostic relay. If the status is consistent, it will operate normally. If the status is inconsistent, it will output an alarm message.

[0024] Furthermore, the signals output by the master station PLC / slave station PLC need to pass through the isolation relay and the diagnostic relay respectively. The PLC judges the status of the isolation relay and the diagnostic relay. If the status is consistent, it runs normally. If the status is inconsistent, an alarm message is output.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can collect material request signals of multiple winding and splicing machine groups and perform time-sharing sorting and feeding in a single-group feeding mode of the winding and splicing machine group. Only one winding and splicing machine group is allowed to request materials at the same time, and other groups queue up and wait in sequence, and the cycle repeats. Moreover, the single-machine / online selection of the winding and splicing machine group, the real-time status of the material request, the queue information, the manual simulation and the like can be performed through the touch screen.

[0027] The present invention realizes that in the single-group feeding mode of the rolling and splicing group, material request signals of multiple rolling and splicing groups can be collected and the material feeding can be sorted in time. Only one rolling and splicing group is allowed to request material at the same time, and other groups queue up and wait in sequence, thereby improving the stability of the negative pressure system of the wind-driven wire feeding, reducing the phenomenon of unstable weight control of the rolling and splicing group due to reduced negative pressure, and cigarette dropping and cigarette throwing on the cigarette transfer drum due to reduced negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a structural diagram of the tobacco sequential feeding system of the tobacco roto-joining unit shown in the present invention;

[0030] Figure 2 The present invention shows that the rolling machine group is physically isolated from the PLC through the relay module, and the wiring principle diagram;

[0031] Figure 3 It is a wiring schematic diagram of the input, output and diagnostic signals of the PLC shown in the present invention;

[0032] Figure 4 It is a touch screen design page diagram shown in the present invention;

[0033] Figure 5 It is a flow chart of a tobacco shreds timing feeding control method of a tobacco roto-joining unit shown in the present invention;

[0034] Figure 6 It is a schematic diagram of the PLC intelligent diagnosis principle shown in the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] It should be noted that the following detailed descriptions are all illustrative and 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.

[0037] 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.

[0038] Embodiment 1

[0039] like Figure 1 As shown, this embodiment provides a tobacco time-sequential feeding system for a roto-rolling unit. This system numbers several machines that require materials, uses Siemens PLC model 1215C as the controller master station, and is placed in the electrical cabinet of a roto-rolling unit; uses Siemens PLC model 1214C as the slave station and is placed in other roto-rolling units respectively, and the PLCs use the PROFINET bus communication method; the controller power supply adopts a separate power supply method with intelligent diagnosis function to increase reliability. The PLCs in each station respectively collect the tobacco material cut-off valve signal, tobacco cavity full material signal, tobacco upper storage area full material signal, etc. of the roto-rolling unit. After all signals are collected, they are uniformly sent to the master station PLC through network communication. The master station PLC queues and processes each signal, and after processing, controls the action of the tobacco material cut-off valve of each unit to complete the material cycle. Each station is equipped with a Siemens touch screen, which can be used to view the real-time status of the roto-rolling unit material request, queue information, manual simulation, single machine / online switching, etc.

[0040] Figure 1 In the example, the winder group 1 is used as the site of the master station PLC, and the slave station winder group 2, winder group 3, etc. are connected through the network switch PROFINET bus protocol; except for an additional switch in the master station, the rest of the structure is the same as the slave station.

[0041] The master station PLC collects the "cut-off valve signal" and "tobacco cavity full material signal" of the master station roto-joining unit; the slave PLC collects the "cut-off valve signal" and "tobacco cavity full material signal" of the slave station roto-joining unit; all signals collected by the slave station PLC are sent to the master station PLC through network communication and do not participate in signal processing. The master station PLC is responsible for processing the input signals of all stations.

[0042] After the master station PLC processes all the winder unit signals, it drives the master station "cut-off valve" and "gate release signal", and drives each slave station "cut-off valve" and "gate release signal" through network communication.

[0043] Each master station PLC and slave station PLC are equipped with a completely identical touch screen, which can realize linkage debugging between stations. The connection method between the touch screen and PLC is PROFINET communication.

[0044] Relay isolation protection circuits are installed between the tobacco roto-rolling unit and the PLC to reduce mutual interference between the two: K1 is the isolation relay between the "cut-off valve signal" and the PLC input; K2 is the isolation relay between the "cut-off valve output" and the PLC output; K3 is the isolation relay between the "tobacco chamber full signal" and the PLC input; K4 is the isolation relay between the "gate release signal" and the PLC output;

[0045] On the basis of the isolation circuit, a diagnostic circuit for each input and output signal is also configured to determine whether the input and output signals have been executed: K11 is a diagnostic relay between the "cut-off valve signal" and the PLC input; K21 is a diagnostic relay between the "cut-off valve output" and the PLC output; K31 is a diagnostic relay between the "tobacco chamber full signal" and the PLC input; K41 is a diagnostic relay between the "gate release signal" and the PLC output. Please see Table 1 for the I / O allocation of the master station PLC and the slave station PLC.

[0046] Table 1 I / O allocation table of PLC of the present invention

[0047] Project Code Input / output address source Notes A111V-A27 I0.0 Y57V / K1 Cut-off valve signal K1 A112V-A4 I0.1 B8V / K3 Tobacco cavity full signal K3 Siemens PLC-1200 I0.2 K11 Shutoff valve signal (diagnosis) K11 Siemens PLC-1200 I0.3 K31 Tobacco cavity full signal (diagnosis) K31 Siemens PLC-1200 I0.4 K21 Shutoff valve output (diagnosis) K21 Siemens PLC-1200 I0.5 K41 Gate release signal (diagnosis) K41 Siemens PLC-1200 Q0.0 K2 Cut-off valve output K2 Siemens PLC-1200 Q0.1 K4 Gate release signal K4

[0048] Figure 2 , 3 It is a core circuit diagram of part of the present invention. Figure 2 To achieve physical isolation between the winding and connecting unit and the PLC through the relay module, as well as the wiring principle; Figure 3 This is the wiring principle of the PLC input, output and diagnostic signals. Figure 2 , Figure 3 It can be seen that:

[0049] 1. The terminal block PLC_1200_X2 divides the "cut-off valve output signal" under the A111V-A27 module into two paths: one path is connected to the coil of the isolation relay K1 and the coil of the diagnostic relay K11, and the corresponding contacts of K1 and K11 enter the I0.0 and I0.2 input points of the PLC respectively; the other path is connected to the contacts of the isolation relay K2 and the coil of the diagnostic relay K21. The isolation relay K2 is controlled by the Q0.0 output point of the PLC, and the contacts of the diagnostic relay K21 enter the I0.4 input point of the PLC. Its purpose is to realize the "cut-off valve output signal" of the winding and splicing unit entering the PLC, and the PLC outputs a new "cut-off valve output signal" to control the solenoid valve Y57V / Y57V-1 and perform diagnosis.

[0050] 2. B8V is a tobacco cavity full signal sensor. Its signal output end leads the signal to drive the isolation relay K3 and the diagnostic relay K31 through the wiring terminals PLC_1200_X4 and PLC_1200_X5. The corresponding contacts of K3 and K31 enter the I0.1 and I0.3 input points of the PLC respectively for PLC judgment and diagnosis.

[0051] 3. B6V is the gate release signal sensor. Its signal output end is cut off and divided into two paths through the wiring terminal PLC_1200_X6: one path enters the No. 11 terminal of the isolation relay K4, and the other path enters the No. 14 terminal of the isolation relay K4. At the same time, the signal is sent to the diagnostic relay K41. The isolation relay K4 is controlled by the Q0.1 output point of the PLC, and the contact of the diagnostic relay K41 enters the I0.5 input point of the PLC. Its purpose is to realize the release and diagnosis of the gate.

[0052] Figure 4 It is the main control interface of the touch screen, which includes the single machine / online signal switching, the currently executed rolling and connecting machine group, the rolling and connecting machine group in the queue, the material request interval between each rolling and connecting machine group, the material request duration, the current remaining time, the tobacco full signal, the shut-off valve signal, the machine number, the queue number and other information.

[0053] The present invention can collect the material request signals of multiple roto-joint groups and perform time-sharing sorting and feeding in the single-group feeding mode of the roto-joint group; and can select the roto-joint group single machine / online, view the real-time status of the request, queue information, manual simulation, etc. through the touch screen. Its characteristics are: by switching the roto-joint group single machine / online selection, only one roto-joint group is allowed to request materials at the same time, and the other groups are queued and waited in order, and the cycle repeats.

[0054] Embodiment 2

[0055] This embodiment provides a method for controlling the timing feeding of tobacco shreds in a tobacco roto-joining machine group, comprising:

[0056] like Figure 5 As shown in the figure, the take-up group in each station can select online and stand-alone mode through the touch screen button, and the online mode is selected by default when the machine is turned on. In stand-alone mode, the input and output signals of the take-up group are directly connected, and there is no need to wait in line. The material can be requested directly according to the original take-up group system request method.

[0057] In online mode, the material request signal of the rolling and splicing unit in each station (the high level of the shut-off valve of the original rolling and splicing unit system) enters the queue set by the master station PLC in the order of triggering. The queue is a dedicated storage area inside the PLC and generates a queue number. The system executes the opening and closing of the "tobacco shut-off valve" in sequence according to the queue number, and synchronously controls the "gate release signal" to complete the tobacco suction work.

[0058] On the other hand, in the online mode, the opening time of the "tobacco cut-off valve" is determined by the "touch screen setting material request time" or the "tobacco chamber full material signal", and only one of the two needs to be met to close the "tobacco cut-off valve".

[0059] Furthermore, in the online mode, as long as there are units in the queue, the system will continue to execute in a loop; when there are no units in the queue, it will enter the standby state and be ready to accept queues at any time.

[0060] like Figure 6 As shown, taking K1 / K11 as an example: the signal that needs to be collected by the PLC enters the PLC through the isolation relay K1 and the diagnostic relay K11 respectively, and the PLC judges the status of the two. If the status is consistent, it runs normally. If the status is inconsistent, it outputs an alarm message.

[0061] The present invention realizes that in the single-group feeding mode of the roto-joining group, the signal of multiple roto-joining groups requesting materials can be collected and the feeding can be sorted in time. Only one roto-joining group is allowed to request materials at the same time, and the other groups are queued and waited in order, and the cycle repeats. Moreover, the single-machine / online selection of the roto-joining group, the real-time status of the requesting materials, the queue information, the manual simulation and the like can be performed through the touch screen. The present invention improves the stability of the negative pressure system of the wind-powered wire feeding, reduces the phenomenon of unstable weight control of the roto-joining group due to the reduction of negative pressure, and the phenomenon of cigarette dropping and cigarette throwing due to the reduction of negative pressure on the cigarette transfer drum. The stability of the control system of the present invention is improved by means of relay isolation and self-diagnosis.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tobacco shreds sequential feeding system for a tobacco roto-joining unit, characterized in that: include: The master station PLC is placed in the electrical cabinet of a certain winding and connecting unit, and several slave station PLCs are placed in the electrical cabinets of other winding and connecting units; the master station PLC and the slave station PLC, as well as the slave station PLC and the slave station PLC are connected by a network communication protocol bus; In the stand-alone mode, the master station PLC / slave station PLC independently controls the tobacco material cut-off valve action and gate release signal of the tobacco roto-joining unit according to the tobacco material cut-off valve signal and tobacco cavity full material signal collected by each unit; In the online mode, the master station PLC and all slave station PLCs collect the tobacco material cut-off valve signals and tobacco cavity full material signals of their respective rolling and connecting machine groups. All slave station PLCs send all the collected signals to the master station PLC so that the master station PLC queues and processes each signal. After processing, it controls the action of the tobacco material cut-off valves of each rolling and connecting machine group and the gate release signal.

2. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 1, characterized in that: The circuit structure of the master PLC and all slave PLCs is the same.

3. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 1 or 2, characterized in that: A relay isolation protection circuit is provided between the winding and connecting machine group and the master station PLC / slave station PLC.

4. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 3, characterized in that: Isolation relays are provided between the mechanism that generates the cut-off valve signal of the rolling and splicing unit and the master PLC / slave PLC, between the mechanism that generates the cut-off valve output of the rolling and splicing unit and the master PLC / slave PLC, between the mechanism that generates the tobacco cavity full signal of the rolling and splicing unit and the master PLC / slave PLC, and between the mechanism that generates the gate release signal of the rolling and splicing unit and the master PLC / slave PLC.

5. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 4, characterized in that: Diagnostic relays are provided between the mechanism that generates the cut-off valve signal of the rolling unit and the master station PLC / slave station PLC, between the mechanism that generates the cut-off valve output of the rolling unit and the master station PLC / slave station PLC, between the mechanism that generates the tobacco cavity full signal of the rolling unit and the master station PLC / slave station PLC, and between the mechanism that generates the gate release signal of the rolling unit and the master station PLC / slave station PLC.

6. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 5, characterized in that: The isolation relay and the diagnostic relay in the same electrical cabinet of the winding machine are connected to each other.

7. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 1 or 2, characterized in that: The master station PLC / slave station PLC are equipped with a touch screen for single machine / online signal switching, displaying the currently executed rolling and connecting machine group, displaying the rolling and connecting machine groups in the queue, displaying the material request interval between each rolling and connecting machine group, displaying the material request duration, displaying the current remaining time, displaying the tobacco full signal, displaying the shut-off valve signal, displaying the machine number and displaying the queue number.

8. The tobacco shreds sequential feeding system of the tobacco roto-joining unit according to claim 1 or 2, characterized in that: The master station PLC / slave station PLC adopts independent power supply.

9. A method for controlling the timing feeding of tobacco shreds in a tobacco roto-joining unit, characterized in that: The tobacco shreds sequential feeding system for a tobacco roto-joining unit according to any one of claims 1 to 8 comprises: If the tobacco roto-joining unit is determined to be in stand-alone mode, the master station PLC / slave station PLC will independently control the tobacco roto-joining unit tobacco cut-off valve action and gate release signal according to the tobacco cut-off valve signal and tobacco cavity full material signal collected by the tobacco roto-joining unit; If the tobacco rolling machine is determined to be in online mode, the master station PLC and all slave station PLCs will collect the tobacco material cut-off valve signal and tobacco cavity full signal of their respective tobacco rolling machines, and all slave station PLCs will send all the collected signals to the master station PLC, so that the master station PLC will enter the queue in sequence according to the sequence of signals; generate a queue list; the queue executes the valve action in a first-in-first-out manner; if the valve operation time is reached or the tobacco cavity full signal is triggered, indicating that the current machine has finished loading materials, it will continue to determine whether there are still machines in the queue. If so, it will be executed in the order of the machine queue. Otherwise, re-enter the mode selection to generate a new queue list until the PLC issues a shutdown command and the program stops the loop.

10. The tobacco shreds timing feeding control method of the tobacco roto-joining unit according to claim 9, characterized in that: The signals collected by the master station PLC / slave station PLC need to enter the PLC through the isolation relay and the diagnostic relay respectively. The PLC judges the status of the isolation relay and the diagnostic relay. If the status is consistent, it will run normally. If the status is inconsistent, it will output an alarm message. or, The signals output by the master station PLC / slave station PLC need to pass through the isolation relay and the diagnostic relay respectively. The PLC judges the status of the isolation relay and the diagnostic relay. If the status is consistent, it will run normally. If the status is inconsistent, it will output an alarm message.

Images