Plate pulling system based on PLC bus communication control and filter press

Abstract

The utility model provides a pull plate system based on PLC bus communication control and a filter press, and the scheme adopts a bus to connect a PLC controller and a servo driver of the filter press so as to realize the PLC bus communication control of the filter press. According to the mode, the data transmission speed is high, the anti-interference capability is high, and the stability and the reliability of communication are remarkably improved. Through a bus communication mode, the number of wiring of DI, DO and other detection signals is reduced, so that control is more flexible and efficient, and wiring is simpler, more economical and more efficient. The complexity of installation and maintenance is reduced, and the cost is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter press technical field especially is involved in a kind of pull plate system and filter press based on PLC bus communication control. BACKGROUND

[0002] In the application of medium and large filter press, not only the size of filter plate is significantly increased, but also the number far exceeds normal configuration, which directly leads to the significant increase of labor intensity in the process of filter plate cake unloading, and also makes the stability of pull plate mechanism face severe challenges. In view of this situation, the traditional filter press generally uses controller and servo driver communication to control pull plate, but the traditional filter press usually relies on point-to-point communication mode between controller and servo driver in pull plate control, that is, each output point of the controller needs to be connected with the corresponding input point of the servo driver to transmit various control signals and detection signals. However, with the significant increase of filter plate size and number, the number of required control signals and detection signals also increases accordingly, resulting in low data transmission efficiency of point-to-point communication mode. This not only affects the real-time performance of pull plate control, but also may cause inaccurate control due to data transmission delay. And in the application environment of medium and large filter press, point-to-point communication mode is easily disturbed by external interference, resulting in a big discount in communication stability. This may cause loss, error or delay of pull plate control signal, and further affect the pull plate efficiency of filter press. Point-to-point communication mode requires a large number of physical connections, resulting in extremely complex wiring work. In addition, complex wiring also increases the difficulty and cost of later maintenance. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a pull plate system and filter press based on PLC bus communication control, to solve the technical problems of slow data transmission speed, easy to be disturbed, complex wiring, increase installation and maintenance difficulty and cost, etc. between the controller and servo driver of the existing filter press using point-to-point communication control mode.

[0004] To achieve the above object and other related objects, the utility model provides a kind of pull plate system based on PLC bus communication control, the system includes: PLC controller, servo driver, servo motor, speed reducer, chain drive mechanism and pull plate manipulator;Wherein, the PLC controller is connected with the servo driver by a bus;The servo driver is connected with the servo motor by cable;The servo motor is connected with the speed reducer;The speed reducer is connected with the chain drive mechanism;The pull plate manipulator is installed on the chain drive mechanism;The PLC controller sends control instruction to the servo driver using bus communication mode, then sends control instruction to the servo motor by servo driver to carry out corresponding movement, and the movement after deceleration is transmitted to chain drive mechanism by speed reducer to drive pull plate manipulator to carry out pull plate operation.

[0005] In an embodiment of the utility model, the PLC controller includes: a communication module for sending control instructions to the servo driver through bus communication mode.

[0006] In an embodiment of the utility model, the communication module is further used for receiving one or more of the current state, voltage, current, speed, torque size and alarm signal of the servo motor sent by the servo driver through the bus.

[0007] In an embodiment of the utility model, the system further includes: an HMI touch screen connected with the PLC controller, for inputting control parameters and sending to the PLC controller; and further for receiving and displaying one or more of the current state, voltage, current, speed, torque size and alarm signal of the servo motor transmitted by the PLC controller.

[0008] In an embodiment of the utility model, the PLC controller sends control instructions to the servo driver in the form of control words or pulse signals through bus communication mode.

[0009] In an embodiment of the utility model, the PLC controller includes: a first communication unit for writing position control signals to the servo driver in the form of control words through the bus; and a second communication unit for sending torque control signals to the servo driver in the form of pulse signals and direction signals through the bus.

[0010] In an embodiment of the utility model, the second communication unit sends pulse signals and direction signals to the servo driver through output points Q0.0 and Q0.1 respectively.

[0011] In an embodiment of the utility model, the PLC controller is connected with the servo driver through MODBUS protocol bus.

[0012] In one embodiment of this utility model, the servo driver is connected to the servo motor via a communication cable and a power cable.

[0013] To achieve the above and other related objectives, this utility model provides a filter press including: the aforementioned plate pulling system based on PLC bus communication control.

[0014] As described above, this utility model is a plate-pulling system and filter press based on PLC bus communication control, which has the following advantages: This utility model achieves PLC bus communication control of the filter press by connecting the PLC controller and servo driver of the filter press through a single bus. This method not only has fast data transmission speed but also strong anti-interference ability, significantly improving the stability and reliability of communication. Through bus communication, this utility model reduces the number of DI, DO, and other detection signal wires, making wiring simpler, more economical, and more efficient. This not only reduces the complexity of installation and maintenance but also reduces costs. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of a pull-plate system based on PLC bus communication control in one embodiment of this utility model.

[0016] Figure 2 The diagram shown is a structural schematic of a pull-plate system based on PLC bus communication control in one embodiment of this utility model.

[0017] Figure 3 The diagram shows a structural schematic of a filter press according to one embodiment of the present invention. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0019] It is noted that in the following description, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration various embodiments of the present application. It is to be understood that other embodiments can be utilized and that mechanical, electrical, and operational changes can be made without departing from the spirit and scope of the present application. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the embodiments of the present application are defined only by the claims. The summary of the application is not intended to limit the scope of the application, but to provide background information related to the technical field of the application. The use of the terms "a" and "an" and "the" and "at least one" are intended to include both singular and plural referents unless the context clearly dictates otherwise. The terms "comprises", "comprising", "includes", "including", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "about" and "substantially" are used to describe the approximate location and / or amount of a structural or functional element. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0020] Throughout this specification, when it is said that a certain part is "connected" to another part, this includes not only the case of "direct connection", but also the case of "indirect connection" in which other elements are interposed therebetween. In addition, when it is said that a certain part "includes" a certain constituent element, unless specifically stated to the contrary, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0021] The terms first, second, third, etc. mentioned therein are used to describe various parts, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish a certain part, component, region, layer or section from other parts, components, regions, layers or sections. Therefore, the first part, component, region, layer or section described below can refer to the second part, component, region, layer or section within the scope of the present application without exceeding the scope of the present application.

[0022] Further, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", when used herein, specify the presence of stated features, operations, elements, components, items, categories, and / or groups but do not preclude the presence or addition of one or more other features, operations, elements, components, items, categories, and / or groups thereof. The terms "or" and "and / or" as used herein are to be interpreted as inclusive, i.e., as meaning one or any combination of any of the items, categories, and / or groups. Accordingly, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. An exception to this definition will occur only when a combination of elements, functions, or operations are in some way inherently mutually exclusive.

[0023] The utility model provides a kind of pull plate system based on PLC bus communication control, and the PLC controller and servo driver of filter press are connected by a bus to realize filter press PLC bus communication control.This mode not only data transmission speed is fast, and anti-interference ability is strong, significantly improve the stability and reliability of communication.Through bus communication mode, the utility model reduces the wiring quantity of DI, DO and other detection signals, so that wiring is simpler, more economical and efficient.This not only reduces the complexity of installation and maintenance, but also reduces cost.

[0024] The embodiments of the utility model are described in detail below with reference to the drawings, so that the skilled in the art of the utility model can easily implement. The utility model can be embodied in various different forms and is not limited to the embodiments described herein.

[0025] As Figure 1 The utility model discloses a kind of pull plate system based on PLC bus communication control of embodiment of the utility model, and its structure schematic diagram is shown in the figure.

[0026] The system includes: PLC controller 1, servo driver 2, servo motor 3, speed reducer 4, chain transmission mechanism 5 and pull plate manipulator 6;

[0027] Among them, the PLC controller 1 is connected with the servo driver 2 by a bus;The servo driver 2 is connected with the servo motor 3 by cable;The servo motor 3 is connected with the speed reducer 4;The speed reducer 4 is connected with the chain transmission mechanism 5;The pull plate manipulator 6 is installed on the chain transmission mechanism;

[0028] The PLC controller 1 controls servo motor pull plate by data transmission and communication on bus.PLC controller 1 sends control instruction to servo driver 2 by bus, and these instructions control the operating state of servo motor 3, including torque, speed position and other key parameters.The bus protocol used can be Profibus, EtherCAT, CANopen, Modbus, TCP, which can be set according to demand and actual situation.The servo driver 2 converts the received instruction into control signal recognizable by servo motor to realize accurate control of servo motor 3.The servo motor 3 receives control signal from the servo driver 2 and moves accordingly.The speed reducer 4 is used to reduce the speed of servo motor, and the power after deceleration is transmitted to the chain transmission mechanism 5.The chain transmission mechanism 5 is used to transmit the power output by the speed reducer to the pull plate manipulator 7 and perform pull plate operation.The pull plate manipulator 6 is the actuator of the system, responsible for performing specific pull plate tasks.The pull plate manipulator 6 is installed on the chain transmission mechanism 5, and its movement is realized by accurate control of the chain transmission mechanism 5.

[0029] It needs to be explained that the PLC controller 1, namely programmable logic controller, is used for storing instructions for performing logical operation, sequence control, timing, counting and arithmetic operation and the like in the interior, and controlling various types of mechanical equipment or production process through digital or analog input and output. The PLC controller 1 used in the utility model can adopt an existing device which has already possessed control instruction generation logic. The servo driver 2 is a device for controlling servo motor, which can convert input voltage signal or current signal into angular displacement or angular velocity output on the motor shaft, so as to realize high-precision position control, speed control and torque control. The servo driver 2 used in the utility model can adopt an existing servo driver with built-in encoder, such as HuiChuan servo driver.

[0030] In an embodiment of the utility model, as shown in Figure 2 , the PLC controller 1 comprises a communication module for sending control instructions to the servo driver through bus communication mode. The communication module is responsible for sending the control instructions generated in the PLC controller to the servo driver through the bus.

[0031] In an embodiment of the utility model, the communication module is further used for receiving one or more of the current state, voltage, current, rotating speed, torque size and alarm signal of the servo motor sent by the servo driver through the bus.

[0032] In an embodiment of the utility model, as shown in Figure 1 , the system further comprises an HMI (Human-Machine Interface, human-machine interface) touch screen 7 connected to the PLC controller, which is used for inputting control parameters and displaying the current state of the servo motor. The HMI touch screen 7 provides an intuitive user interface, so that the operator can directly input control parameters through the graphical interface and send them to the PLC controller 1. The HMI touch screen 7 is also used for displaying one or more of the current state, motor voltage, motor current, motor rotating speed, motor torque size and alarm signal of the servo motor 3 transmitted by the PLC controller 1, so that the operator can intuitively understand the running state of the servo motor 3 and take corresponding measures when necessary.

[0033] In an embodiment of the present application, the PLC controller 1 sends control instructions in the form of control words or pulse signals to the servo driver through bus communication. A control word is a digital signal containing multiple binary bits, each bit representing specific control information or parameters. By changing the values of these bits, the PLC controller can control various functions and parameters of the servo motor, such as starting, stopping, speed setting, direction control, etc. Control instructions can also be sent in the form of pulse signals. A pulse signal is a periodic digital signal whose frequency and duty cycle can represent different control information. By adjusting the frequency and duty cycle of the pulse signal, the PLC controller can achieve torque and speed control of the servo motor. It should be noted that the PLC controller 1 can use existing PLC controllers that can generate control words and pulse signal form control instructions.

[0034] In an embodiment of the present application, the PLC controller 1 includes a first communication unit, mainly responsible for passing position control signals to the servo driver in the form of control words through bus communication, for controlling the position and speed of the servo. This communication method ensures the accuracy and stability of the signal. In the preferred embodiment, the first communication unit uses RS485 interface for data writing. The RS485 interface has the characteristics of long transmission distance and strong anti-interference ability, and performs well in industrial field communication. This interface can effectively resist various disturbances in the field environment, ensuring accurate transmission of position control signals, thereby achieving precise position control of the servo driver. The second communication unit focuses on sending torque control signals to the servo driver in the form of pulse signals through bus communication. This control method allows the PLC controller to flexibly adjust the output torque of the servo driver to meet different application requirements. In the preferred embodiment, the second communication unit includes output point Q0.0 and output point Q0.1. These two output points are used to send pulse signals and direction signals to the servo driver, respectively. The frequency and number of pulse signals determine the size of the output torque of the servo driver, while the direction signal is used to indicate the rotation direction of the servo driver. Through the coordinated work of these two output points, the PLC controller can achieve precise control of the torque of the servo driver.

[0035] In an embodiment of the present application, the DO1 port and the DO2 port of the servo driver 2 are connected to the communication module of the PLC controller; the DO1 port is configured to send a zero speed feedback signal to the PLC controller. When the servo driver detects that the servo motor it drives reaches a zero speed state (i.e. stops rotating), the DO1 port will output a zero speed feedback signal; the DO2 port is configured to send a zero alarm feedback signal to the PLC controller. When the servo driver detects any abnormal situation that may cause it to stop working or performance degradation, the DO2 port will output an alarm signal.

[0036] In an embodiment of the utility model, the PLC controller is connected with the servo driver through MODBUS protocol bus. MODBUS is a classic communication protocol, supports two transmission modes of serial communication (Modbus RTU) and TCP / IP (Modbus TCP), and occupies an important position in PLC communication with its simplicity, easy deployment and maintenance.

[0037] In an embodiment of the utility model, the servo driver 2 is connected with the servo motor through communication cable and power cable. Communication cable is mainly used for transmitting control signals and state information between servo driver and servo motor. Communication cable usually adopts differential signal transmission technology to improve the anti-interference ability and transmission distance of signals. Power cable is responsible for providing the required electric energy for the servo motor to drive its normal operation. These cables usually contain three-phase power lines (U, V, W) and possible ground lines (PE) for transmitting alternating current or direct current electric energy output by the servo driver.

[0038] Similar to the principle of the above embodiment, the utility model also provides a filter press. As Figure 3 A filter press schematic diagram in the embodiment of the utility model is shown.

[0039] The filter press comprises: a pull plate system 100 controlled based on PLC bus communication, the system comprises: a PLC controller, a servo driver, a servo motor, a speed reducer, a chain transmission mechanism and a pull plate manipulator, wherein the PLC controller is connected with the servo driver through a bus, the servo driver is connected with the servo motor through a cable, the servo motor is connected with the speed reducer, the speed reducer is connected with the chain transmission mechanism, the pull plate manipulator is installed on the chain transmission mechanism, the PLC controller sends control instructions to the servo driver in a bus communication mode, and then the control instructions are sent to the servo motor through the servo driver to perform corresponding movement, and the movement after deceleration is transmitted to the chain transmission mechanism by the speed reducer to drive the pull plate manipulator to perform pull plate operation.

[0040] The filter press of the utility model realizes PLC bus communication control of the filter press by connecting the PLC controller and the servo driver with a bus. This mode not only has high data transmission speed, but also has strong anti-interference ability, and significantly improves the stability and reliability of communication. Through the bus communication mode, the complexity of installation and maintenance is reduced, and the cost is also reduced. The performance of the filter press is improved, and the user also has more convenient and economical operation experience.

[0041] In summary, the pull plate system based on PLC bus communication control and the filter press of the present application, through a bus connecting the PLC controller and servo driver of the filter press to realize the PLC bus communication control of the filter press. This way not only the data transmission speed is fast, but also the anti-interference ability is strong, significantly improves the stability and reliability of the communication. Through the bus communication mode, the present application reduces the number of DI, DO and other detection signal wiring, making the wiring more simple, economical and efficient. This not only reduces the complexity of installation and maintenance, but also reduces the cost. Therefore, the present application effectively overcomes the shortcomings of the prior art and has high industrial utilization value.

[0042] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

Claims

1. A pull plate system based on PLC bus communication control, characterized in that, The system comprises a PLC controller, a servo driver, a servo motor, a speed reducer, a chain transmission mechanism and a pull plate manipulator. The PLC controller is connected to the servo driver through a bus, the servo driver is connected to the servo motor through a cable, the servo motor is connected to the speed reducer, and the speed reducer is connected to the chain transmission mechanism. The pull plate manipulator is installed on the chain transmission mechanism. The PLC controller sends control instructions to the servo driver through bus communication, and the servo driver sends the control instructions to the servo motor for corresponding movement, and the speed reducer transmits the decelerated movement to the chain transmission mechanism to drive the pull plate manipulator to perform pull plate operation.

2. The puller plate system based on PLC bus communication control according to claim 1, characterized in that, The PLC controller comprises a communication module for sending control instructions to the servo driver through bus communication.

3. The puller plate system based on PLC bus communication control according to claim 2, characterized in that, The communication module is also used to receive one or more of the current state, voltage, current, speed, torque size and alarm signal of the servo motor sent by the servo driver through the bus.

4. The puller plate system based on PLC bus communication control according to claim 3, characterized in that, The system further comprises an HMI touch screen connected to the PLC controller, which is used to input control parameters and send them to the PLC controller, and also used to receive and display one or more of the current state, voltage, current, speed, torque size and alarm signal of the servo motor transmitted by the PLC controller.

5. The puller plate system based on PLC bus communication control according to claim 2, characterized in that, The PLC controller sends control instructions to the servo driver in the form of control words or pulse signals through bus communication.

6. The puller plate system based on PLC bus communication control according to claim 5, characterized in that, The PLC controller comprises a first communication unit for writing position control signals to the servo driver in the form of control words through the bus, and a second communication unit for sending torque control signals to the servo driver in the form of pulse signals and direction signals through the bus.

7. The puller plate system based on PLC bus communication control according to claim 6, characterized in that, The second communication unit sends pulse signals and direction signals to the servo driver through output points Q0.0 and Q0.1 respectively.

8. The pull strip system based on PLC bus communication control according to claim 2, characterized in that, The PLC controller is connected to the servo driver through a MODBUS protocol bus.

9. The pull strip system based on PLC bus communication control according to claim 1, characterized in that, The servo driver is connected to the servo motor through a communication cable and a power cable.

10. A filter press, characterized in that The system comprises a PLC controller, a servo driver, a servo motor, a speed reducer, a chain transmission mechanism and a pull plate manipulator. The system comprises a PLC controller, a servo driver, a servo motor, a speed reducer, a chain transmission mechanism and a pull plate manipulator. The system comprises a PLC controller, a servo driver, a servo motor, a speed reducer, a chain transmission mechanism and a pull plate manipulator.

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