A cotton cleaner and foreign fiber machine linkage device

Abstract

This utility model discloses a linkage device between a cotton cleaner and a fiber separator, belonging to the field of textile technology. It includes a cotton cleaner connected to a fiber separator via a conveying pipe; the fiber separator includes a cotton flow striking mechanism and a second control box; and a signal acquisition module whose input terminals are connected to the operation feedback signal terminal and fault signal terminal of the cotton flow striking mechanism. This utility model integrates operation feedback and three types of fault signals through the signal acquisition module, constructing a dual-condition judgment logic of operation status and fault characteristics: shutdown is triggered only when the striking motor is powered and overloaded, completely eliminating false shutdowns caused by abnormal power supply to the fiber separator. This mechanism allows the cotton cleaner to continue operating under non-real fault scenarios, directly improving equipment operational stability, reducing production interruption frequency, and ensuring production process continuity.

Description

Technical Field

[0001] This utility model relates to the field of textile technology, specifically to a linkage device for a cotton cleaning machine and a foreign fiber machine. Background Technology

[0002] In textile machinery opening and cleaning combined units, the opening and cleaning machine and the foreign fiber removal machine are connected by pipelines to form a continuous production line, which is a common design in the industry. In existing technologies, the following solutions are commonly used to achieve coordinated control between the equipment:

[0003] When a core component of the foreign fiber machine (such as the cotton flow striking mechanism, or striking mechanism for short) malfunctions, the PLC collects the fault signal and immediately cuts off the operating power of the cotton cleaning machine, while triggering a single alarm light to indicate the fault.

[0004] A single alarm light can only indicate "a fault exists" and cannot distinguish specific types such as abnormal cotton flow, cotton feeding failure, or fan frequency converter failure. Workers need to check the equipment one by one, which seriously delays the fault handling time. The cotton machine is stopped immediately after it is cleared, which means that the cotton already transported in the pipeline cannot be processed. The residual cotton accumulates and forms a blockage, and subsequent manual cleaning is time-consuming and labor-intensive. In addition, after the fault is cleared, the reset button must be pressed manually to resume production. This can easily cause recovery delays when the equipment is widely distributed or when there is no one to operate it. The rigid shutdown method of directly cutting off the power can easily cause equipment impact and cannot adapt to the pipeline emptying requirements under different cotton types and working conditions.

[0005] Existing improvement solutions mostly focus on the hardware level, such as increasing the number of sensors or modifying the mechanical structure to enhance functionality. However, such solutions require changes to the original circuitry and equipment layout, resulting in high implementation costs and poor compatibility. For textile manufacturing enterprises, how to improve the system's intelligence level through control logic optimization while retaining the existing equipment hardware architecture remains a pressing technical problem to be solved. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a linkage device for cotton cleaning machine and foreign fiber machine.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A linkage device for a cotton cleaning machine and a foreign fiber machine, comprising:

[0009] The cotton cleaning machine is connected to the foreign fiber machine via a conveying pipe;

[0010] The fiber transfer machine includes a cotton flow striking mechanism and a second control box;

[0011] The signal acquisition module has its input terminals connected to:

[0012] The operation feedback signal terminal and fault signal terminal of the cotton flow striking mechanism;

[0013] The output port of the cotton feeding mechanism of the foreign fiber machine is faulty;

[0014] The signal acquisition module synchronously acquires the on / off status (operational feedback) of the drive contactor of the cotton flow striking mechanism and the trigger status (fault signal) of the overload protector at the fault output port of the blower frequency converter of the foreign fiber machine. It is determined to be a valid fault only when the contactor is closed and overloaded, so as to avoid the cotton cleaning machine from being stopped due to power interruption of the foreign fiber machine (such as accidental tripping).

[0015] PLC controller, communication connection signal acquisition module and the first control box of cotton cleaning machine;

[0016] The execution module has its input end connected to the PLC controller and its output end connected to the stop control circuit and alarm unit of the cotton cleaning machine.

[0017] Preferably, the operation feedback signal terminal outputs the on / off state of the drive contactor of the cotton flow striking mechanism; the fault signal terminal outputs the trigger state of the overload protector of the cotton flow striking mechanism.

[0018] Preferably, the signal acquisition module includes:

[0019] The first optocoupler isolation circuit has its input terminal connected to the operation feedback signal terminal.

[0020] The second optocoupler isolation circuit has its input terminal connected to the fault signal terminal.

[0021] The third optocoupler isolation circuit has its input end connected to the fault output port of the cotton feeding mechanism.

[0022] The fourth optocoupler isolation circuit has its input end connected to the fault output port of the fan inverter.

[0023] Preferably, the PLC controller is configured as follows:

[0024] When any of the fault signal terminals, cotton feeding mechanism fault output ports, or fan inverter fault output ports output a valid fault signal, the shutdown control circuit and alarm unit of the execution module are triggered.

[0025] Preferably, the PLC controller is further configured to delay for a preset time after receiving a valid fault signal before triggering the shutdown control circuit.

[0026] Preferably, the PLC controller is further configured to control the alarm unit to output a differentiated flashing signal based on the source port of the valid fault signal.

[0027] Preferably, the shutdown control circuit includes:

[0028] A relay, the coil of which is connected to the output contacts of the PLC controller;

[0029] The normally closed contacts (K1-13 / 14) are connected in series in the cotton cleaning machine control circuit (such as disconnecting the PLC enable signal or the 24V control power supply of the KM coil), not in the main motor 380V power supply circuit. The capacity of the KM main contacts (63A) meets the requirements of a 37kW motor, and K1 only controls the low voltage control circuit.

[0030] Preferably, it also includes a reset button, the output of which is connected to the PLC controller; the PLC controller is configured to release the trigger state of the stop control circuit when the reset button is triggered and the operation feedback signal terminal outputs an operation signal.

[0031] Preferably, the differentiated flicker signal includes:

[0032] The first flashing pattern corresponding to the fault signal of the cotton flow striking mechanism;

[0033] The second flashing mode corresponding to the fault signal of the cotton feeding mechanism.

[0034] Preferably, the PLC controller includes non-volatile memory for recording signal transition events at fault signal terminals, cotton feeding mechanism fault output ports, and fan inverter fault output ports. Each fault record includes: ① fault type (1=beater, 2=cotton feeder, 3=fan); ② UNIX timestamp (accurate to the second); ③ fault status (0=reset, 1=not reset). The record format is 8 bytes / record, and the DB block can store a maximum of 200 records, which are overwritten in a first-in-first-out cycle. The records can be exported as a CSV file using TIA Portal software for traceability.

[0035] Preferably, the reset button is triggered by continuous pressing for 3 seconds and the operation feedback signal being valid for 5 seconds to prevent accidental reset.

[0036] Preferably, the PLC controller sends fault warnings to the workshop MES system via the MODBUS protocol. When a single fault occurs more than 5 times within 24 hours, it sends address code 0x03 and register 40001.

[0037] Compared with the prior art, the advantages of this utility model are as follows:

[0038] 1. This utility model integrates operational feedback (contactor on / off) and three types of fault signals (beater, cotton feeder, and fan fault) through a signal acquisition module, and constructs a dual-condition judgment logic of operating status and fault characteristics. The machine is only triggered to stop when the beater motor is powered and overloaded, which completely eliminates the false stop caused by abnormal power supply of the foreign fiber machine (such as false tripping). This mechanism enables the cotton cleaning machine to continue to run in non-real fault scenarios, directly improving the stability of equipment operation, reducing the frequency of production interruptions, and ensuring the continuity of the production process.

[0039] 2. This practical cotton cleaning machine and foreign fiber machine are linked via PLC, employing an alarm pre-notification + delayed shutdown mechanism. In the event of a fault, an alarm is first triggered, followed by a calculated delay time (e.g., the time required for pipe emptying) based on the pipe's physical parameters (length, air velocity), ensuring the cotton flow in the pipe is completely cleared before shutdown. This design eliminates cotton accumulation at the moment of shutdown, reducing pipe blockage at its source, lowering equipment maintenance costs, and ensuring stable production cycles.

[0040] 3. This utility model uses a PLC-controlled alarm unit to output differentiated flashing modes (such as frequency and color differentiation) for different fault sources (beater, cotton feeder, fan). Workers can identify faults by mode without having to test each one individually, directly locating the fault type, simplifying the operation and maintenance process, reducing the time spent on fault diagnosis, improving equipment recovery efficiency, and further enhancing the reliability of the production system. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a formal drawing of a cotton cleaner and a foreign fiber separator, which are part of a linkage device for a cotton cleaner and a foreign fiber separator according to this utility model.

[0043] Figure 2 This is a system electrical connection block diagram of a cotton cleaning machine and foreign fiber machine linkage device according to the present invention;

[0044] Figure 3 This is a schematic diagram of the optocoupler isolation circuit of the linkage device of cotton cleaning machine and foreign fiber machine according to the present invention;

[0045] Figure 4 This is a logic diagram of the shutdown control circuit of the linkage device of cotton cleaning machine and foreign fiber machine according to the present invention;

[0046] Figure 5 This is a PLC program flowchart of a cotton cleaning machine and foreign fiber machine linkage device according to the present invention;

[0047] Figure 6 This is a comparison curve of the false stop rate of a cotton cleaning machine and a foreign fiber machine linkage device according to this utility model.

[0048] The labels in the diagram represent:

[0049] 1. Cotton cleaning machine; 2. Conveying pipeline; 3. Foreign fiber machine; 4. Alarm unit; 11. First control box; 31. Cotton flow striking mechanism; 32. Second control box. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0051] A linkage device for a cotton cleaning machine and a foreign fiber machine, comprising:

[0052] The cotton cleaner, model FA106C, has a main motor power of 37kW, a matching cotton conveying pipe with a diameter of 325mm and a length of 12m, and a conveying air speed set to 18m / s.

[0053] The foreign fiber machine, model JWF0012A, has a cotton flow striking mechanism with a beater speed of 800r / min. It is equipped with a Y2-160M-4 type motor (power 11kW) and a thermal relay FR1 (model JR36-20 / 32) for overload protection.

[0054] The cotton feeding mechanism uses a variable frequency motor (power 5.5kW) and is equipped with an overload protection relay FR2 (model JRS1-25).

[0055] The wind turbine system is equipped with a frequency converter FR-A740-15K-CHT. Its fault output terminal TA / TC is a normally open contact that will close in case of a fault.

[0056] The signal acquisition module is equipped with a 4-channel TLP291 optocoupler isolation board, with an input withstand voltage of 500VAC and a response time of no more than 10ms, enabling efficient signal acquisition.

[0057] The PLC controller selected is an S7-1200CPU1214CDC / DC / DC type, with an input filtering time of 10ms and a maximum output load of 0.5A / point, which can stably realize the control function.

[0058] The execution module includes a stop relay K1 of type MY4NJ with a coil voltage of 24VDC, a contact rated current of 10A, and a rated voltage of 250VAC; the alarm unit is an XDT-A type audible and visual alarm with an operating voltage of 220VAC and an adjustable flashing frequency range of 1-2Hz, which can promptly issue reminders about the equipment's operating status.

[0059] In the signal acquisition circuit, the operating feedback signal of the cotton flow striking mechanism is taken from the NO contact (terminals 13 / 14) of the beater motor contactor KM1. This signal is used to determine whether the beater motor is powered on. It forms a logical AND relationship with the fault signal to eliminate false faults when the power is not connected. (BV-1.5mm) 2 The two-color wire is connected to the input terminals 1 (+) and 2 (-) of the first optocoupler board. The output terminal 4 of the optocoupler is connected to the I0.0 of the PLC, and the output terminal 3 is connected to the M terminal (24V-) of the PLC.

[0060] The fault signal is taken from the NC contact (terminal 95 / 96) of the thermal relay FR1, also using BV-1.5mm. 2 The two-color wire is connected to the input terminal of the second optocoupler board, and the output terminal is connected to I0.1 of the PLC;

[0061] The fault output signal of the cotton feeding mechanism is led out from the NC contact (95 / 96 terminal) of the overload relay FR2, connected to the input terminal of the third optocoupler board, and the output terminal is connected to I0.2 of the PLC;

[0062] The fault output terminal TA / TC of the wind turbine frequency converter (closed in case of fault) is connected via RVVP-2×1.0mm. 2 The shielded wire is connected to the input terminal of the fourth optocoupler board. The shielding layer is grounded at one end. The output terminal of the optocoupler is connected to the PLC's I0.3 pin and the output terminal of the PLC's M terminal (24V-) at pin 4.

[0063] The optocoupler is powered by a 24VDC switching power supply (Meanwell S-35-24). The positive terminal is connected to the VCC terminal of the optocoupler board, and the negative terminal is connected to the GND terminal. A 1A fuse is installed at the power input terminal to ensure safe and stable operation of the circuit.

[0064] The logical design of the PLC program function blocks is as follows:

[0065] The fault detection logic immediately sets the intermediate relay M0.0 when any of the signals I0.1 (handle fault), I0.2 (cotton feeding fault), or I0.3 (fan fault) is 1, and simultaneously starts timer T0. The preset value of T0 is T#1.5s, but it can be modified through the DB block. Once timer T0 completes its countdown, Q0.4 will be set to 1, thereby driving the stop relay K1 to operate.

[0066] The preset duration T is calculated as follows: T = pipe length L / cotton conveying wind speed V + equipment response time Δt. In this embodiment, L = 12m, V = 18m / s, Δt = 0.5s (relay action + motor coasting time), so T = 12 / 18 + 0.5 = 1.17s. Considering the fluctuation of cotton flow, it is finally set to 1.5s.

[0067] The differentiated alarm logic works as follows: if a hand-operated fault occurs (i.e., I0.1=1), Q0.0 is controlled by alternating triggers of T1 (T#500ms) and T2 (T#500ms) to achieve a flashing frequency of 1Hz with a duty cycle of 50%. When a cotton feeding fault occurs (i.e., I0.2=1), Q0.0 is controlled by T3 (T#1000ms) and T4 (T#1000ms) to achieve a flashing frequency of 0.5Hz. When a fan fault occurs (i.e., I0.3=1), Q0.0 is controlled by T5 (T#250ms) and T6 (T#250ms) to achieve a flashing frequency of 2Hz.

[0068] The fault logging function uses DB1 data blocks to store information related to fault events. Each fault record contains: fault type (1 represents a blower fault, 2 represents a cotton feeding fault, and 3 represents a fan fault), timestamp (accurate to the second using the PLC's real-time clock function), and fault status (0 indicates the fault has been cleared, and 1 indicates the fault has been triggered). Fault records are stored according to the first-in, first-out principle, meaning that newer records overwrite the oldest records, and a maximum of 200 fault records can be stored.

[0069] The shutdown control circuit uses a MY4NJ type shutdown relay K1. One end of its coil is connected to the Q0.4 output terminal (24V+) of the PLC, and the other end is connected to the M terminal (24V-) of the PLC. The normally closed (NC) contact of K1 is located at terminal 13 / 14. This contact is connected in series in the main circuit of the cotton cleaning machine. The specific connection path is as follows: starting from the output terminal of the circuit breaker QF (model DZ47-63 / 3P), it is connected to terminal 13 and terminal 14 of K1 in sequence, then connected to the coil A1 terminal of the main contactor KM of the cotton cleaning machine, and then connected to the neutral line (N line) from the coil A2 terminal of KM.

[0070] The alarm unit uses an XDT-A type audible and visual alarm. Its L terminal is connected to the 220VAC phase line, and its N terminal is connected to the neutral line. The control terminal of the alarm is connected to the circuit through the normally open (NO) contact of the intermediate relay KA1. One end of the coil of KA1 is connected to the Q0.0 output terminal (24V+) of the PLC, and the other end is connected to the M terminal (24V-) of the PLC. The contact capacity of KA1 is 5A / 250VAC.

[0071] As for the reset circuit, a self-resetting reset button SB1 is configured. One end of SB1 is connected to the 24V+ power supply, and the other end is connected to the I0.4 input terminal of the PLC. A 10kΩ pull-up resistor is connected in parallel between the I0.4 input terminal of the PLC and the M terminal to ensure the stability of the circuit. At the same time, a 0.1μF / 50V debounce capacitor is connected in parallel next to the button SB1 to reduce the impact of contact bounce when the button is pressed on the circuit.

[0072] For hardware installation requirements, the distance between signal cables and power cables should be maintained at more than 300mm, and they need to be laid in galvanized steel pipes to reduce electromagnetic interference. The PLC grounding needs to be set up independently, the depth of the grounding stake should be at least 2.5 meters, and the grounding resistance should be less than or equal to 4Ω to ensure the grounding safety and stability of the equipment. An RC absorption circuit (100Ω / 0.1μF) needs to be installed at the input end of the optocoupler board to suppress electromagnetic interference and improve signal stability.

[0073] For parameter debugging, manually short-circuit the FR1 contact (fault signal). At this time, the PLC's I0.1 indicator light should illuminate, and the alarm light should flash at a frequency of 1Hz to simulate an inverter fault. This will cause the I0.3 indicator light to illuminate, and the alarm light should flash at a frequency of 2Hz to trigger the fault signal. Use a stopwatch to measure the time from signal input to the action of the stop relay K1. Under normal circumstances, this time should be within the range of 5 ± 0.5 seconds. Monitor the DB1 data block using TIA Portal software. After triggering three different types of faults, confirm that the fault type and timestamp recorded in the data block are accurate.

[0074] For operation and maintenance, the input voltage of the optocoupler board needs to be checked monthly to ensure it is within the range of 24V±10%, and the dust on the terminal blocks needs to be cleaned to maintain a good electrical connection.

[0075] Test the grounding resistance quarterly and check the crimping condition of the cable joints to ensure the reliability of the grounding system and the firmness of the cable connections.

[0076] When encountering an abnormal flashing frequency of the alarm light, the corresponding fault point should be checked first, such as the tension of the beater belt, the gap of the cotton feed roller, etc., so as to find and solve the problem in time.

[0077] The first optocoupler is connected to the operation feedback signal terminal, and the corresponding PLC input address is I0.0; the second optocoupler is connected to the fault signal terminal, and the PLC input address is I0.1; the third optocoupler is connected to the cotton feeding mechanism fault port, and the corresponding PLC input address is I0.2; the fourth optocoupler is connected to the fan fault port, and the PLC input address is I0.3.

[0078] Regarding the definition of the reset logic level, the operation feedback signal terminal outputs a high level (24VDC) when the cotton flow striking mechanism is running. The PLC will only release the stop state when it detects that the reset button has been triggered and I0.0 is at a high level. Fault records are implemented through the PLC's VB100-VB119 storage area. Each record occupies 4 bytes, where byte 1 indicates the fault type (1 represents the striker fault, 2 represents the cotton feeding fault, and 3 represents the fan fault), and bytes 2 to 4 represent the fault occurrence time (format: HHMMSS, using BCD code). When any fault signal jumps to a high level, the PLC will automatically record the event.

[0079] The PLC's non-volatile memory in this solution records fault type, timestamp, and status, supporting the tracing of 200 historical events, which facilitates fault statistics and preventive maintenance.

[0080] The reset button requires continuous pressing for 3 seconds plus a continuous 5-second running feedback signal for effective dual triggering to prevent accidental reset during cleaning and avoid recovery delays during unattended periods.

[0081] The signal acquisition module achieves strong and weak current isolation through a four-way optocoupler isolation circuit (TLP291), thereby improving anti-interference capability;

[0082] The shutdown control circuit uses a normally closed relay contact connected in series with the cotton cleaning machine control circuit (not the main motor power supply), which complies with electrical safety regulations and reduces equipment impact.

[0083] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A picker-trap linkage characterized by, include: The cotton cleaning machine (1) is connected to the foreign fiber machine (3) through the conveying pipe (2); The foreign fiber machine (3) includes a cotton flow striking mechanism (31) and a second control box (32). The signal acquisition module has its input terminals connected to: The operation feedback signal terminal and fault signal terminal of the cotton flow striking mechanism (31); The fault output port of the cotton feeding mechanism of the foreign fiber machine (3); The fault output port of the fan inverter of the fiber optic machine (3); PLC controller, communication connection signal acquisition module and first control box (11) of cotton cleaning machine (1); The execution module has an input end connected to the PLC controller and an output end connected to the stop control circuit and alarm unit (4) of the cotton cleaning machine (1).

2. The clearer-trap interlock of claim 1 wherein, The operation feedback signal terminal outputs the on / off state of the drive contactor of the cotton flow striking mechanism (31); the fault signal terminal outputs the overload protector trigger state of the cotton flow striking mechanism (31).

3. The clearer / trueter interlock of claim 1 wherein, The signal acquisition module includes: The first optocoupler isolation circuit has its input terminal connected to the operation feedback signal terminal. The second optocoupler isolation circuit has its input terminal connected to the fault signal terminal. The third optocoupler isolation circuit has its input end connected to the fault output port of the cotton feeding mechanism. The fourth optocoupler isolation circuit has its input end connected to the fault output port of the fan inverter.

4. The clearer / trueter interlock of claim 1 wherein, The PLC controller is configured as follows: When any of the fault signal terminals, cotton feeding mechanism fault output ports, or fan inverter fault output ports output a valid fault signal, the shutdown control circuit and alarm unit (4) of the execution module are triggered.

5. The clearer-trap interlock of claim 4 wherein, The PLC controller is further configured to delay the triggering of the shutdown control circuit for a preset time after receiving a valid fault signal.

6. The clearer / trueter interlock of claim 4 wherein, The PLC controller is further configured to control the alarm unit (4) to output a differentiated flashing signal based on the source port of the valid fault signal.

7. The clearer / trueter interlock of claim 1 wherein, The shutdown control circuit includes: A relay, the coil of which is connected to the output contacts of the PLC controller; The normally closed contact is connected in series in the main motor power supply circuit of the cotton cleaning machine (1).

8. The clearer / trueter interlock of claim 1 wherein, It also includes a reset button, the output of which is connected to a PLC controller; the PLC controller is configured to release the trigger state of the stop control circuit when the reset button is triggered and the operation feedback signal terminal outputs an operation signal.

9. The clearer-trap interlock of claim 6 wherein, The differentiated scintillation signal includes: The first flashing pattern corresponding to the fault signal of the cotton flow striking mechanism; The second flashing mode corresponding to the fault signal of the cotton feeding mechanism.

10. The clearer-trap interlock of claim 1 wherein, The PLC controller includes a non-volatile memory for recording signal transition events at fault signal terminals, cotton feeding mechanism fault output ports, and fan inverter fault output ports.

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