Control device of pneumatic conveying system based on power line carrier communication technology

Abstract

The utility model discloses a pneumatic conveying system control device based on the power line carrier communication technology. The pneumatic conveying system control device comprises a man-machine interaction module, a main controller, a plurality of sub-controllers, a plurality of sensors, a plurality of actuators and power supply equipment. The man-machine interaction module is electrically connected with the main controller, and a first carrier communication module is arranged in the main controller; a second carrier communication module is arranged in each sub-controller, and the first carrier communication module is communicated with the second carrier communication module arranged in each sub-controller through a power line; the plurality of sensors are respectively connected with the sub-controllers, and the sensors are mounted at to-be-monitored positions of the pneumatic conveying system; and the plurality of actuators are respectively connected with the sub-controllers, and are arranged at a plurality of positions of the pneumatic conveying system pipeline. According to the utility model, the problems of complex wiring, high cost, poor anti-interference capability and the like of a traditional process control system in a pneumatic conveying system can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial process control technical field especially relates to a control device of pneumatic conveying system based on power line carrier communication technology. BACKGROUND

[0002] This section aims to provide background or context for the embodiments of the utility model recited in the claims. The description herein does not admit to be prior art because of being included in this section.

[0003] In the field of industrial automation, process control systems are widely used in various production processes to realize the monitoring and control of production equipment. Traditional process control systems usually use wired or wireless communication methods, but these methods have problems such as complex wiring, high cost, poor anti-interference ability, etc. Power line carrier communication technology (PLC) uses power lines as communication media and can realize data transmission without additional wiring, with the advantages of low cost, easy installation, strong anti-interference ability, etc.

[0004] Pneumatic conveying system is a device that uses airflow to transport solid materials and is widely used in chemical, food, pharmaceutical and other industries. The control of pneumatic conveying system needs to monitor and adjust multiple parameters in real time, such as pressure, flow, level, etc. Traditional wired control systems are difficult to meet the requirements of real-time and reliability in complex working conditions. SUMMARY

[0005] The utility model embodiment further provides a control device of pneumatic conveying system based on power line carrier communication technology to solve the problems of complex wiring, high cost, poor anti-interference ability of traditional process control system in pneumatic conveying system, the device includes: man-machine interaction module, main controller, multiple sub-controllers, multiple sensors, multiple actuators, power supply equipment;

[0006] The man-machine interaction module is electrically connected with the main controller, the man-machine interaction module is used for receiving user input data, the main controller is provided with a first carrier communication module, and the main controller is used for data interaction with the sub-controller through the first carrier communication module; The man-machine interaction module and the main controller are installed at a first designated position away from the pneumatic conveying system by a first preset distance;

[0007] Each sub-controller is provided with a second carrier communication module, and the first carrier communication module and the second carrier communication module provided in each sub-controller are connected through power lines; Each sub-controller is installed at a second designated position away from the pneumatic conveying system by a second preset distance; The sub-controller is used for: receiving data transmitted by the sensor, data interaction with the main controller, and transmitting data to the actuator;

[0008] The plurality of sensors are respectively connected with the sub-controllers, and the sensors are installed at the monitoring positions of the pneumatic conveying system;

[0009] The plurality of actuators are respectively connected with the sub-controllers, and the actuators are installed at the plurality of positions of the pipeline of the pneumatic conveying system, and the actuators are used for adjusting the material conveying process;

[0010] The power supply device is connected with the human-computer interaction module, the main controller, the plurality of sub-controllers, the plurality of sensors and the plurality of actuators.

[0011] In an embodiment, the main controller is installed in a control cabinet, and the human-computer interaction module is installed on a panel of the control cabinet, and the human-computer interaction module comprises a touch screen and an indicator light.

[0012] In an embodiment, the first preset distance is greater than the second preset distance.

[0013] In an embodiment, the sensors comprise one or any combination of a pressure sensor, a flow sensor and a material level sensor.

[0014] In an embodiment, the actuators comprise electric valves and / or pneumatic valves.

[0015] In an embodiment, the monitoring positions are located on the bin pump and / or the pipeline of the pneumatic conveying system.

[0016] In an embodiment, the sub-controllers further comprise I / O interfaces connected with the sensors and the actuators.

[0017] Compared with the prior art technical scheme, the power line is used as the communication medium, without additional wiring, the cost is reduced, the power carrier communication module is directly installed on the power line, the installation is simple, the construction difficulty is reduced, the power carrier communication technology has strong anti-interference ability and can stably operate under complex working conditions, and the embodiment of the utility model solves the problems of complex wiring, high cost and poor anti-interference ability of the traditional process control system in the pneumatic conveying system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor. In the drawings:

[0019] Figure 1 It is a schematic view of the control device of the pneumatic conveying system based on the power carrier communication technology in the embodiment of the utility model;

[0020] Figure 2 It is a specific example view of the control device of the pneumatic conveying system based on the power carrier communication technology in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear and obvious, the embodiment of the utility model is further described in detail below in combination with the drawings. Herein, the illustrative embodiment of the utility model and its description are used to explain the utility model, but not as the limitation of the utility model.

[0022] In order to facilitate the clear description of the technical scheme of the embodiment of the utility model, in the embodiment of the utility model, the same items or similar items with basically same function and action are distinguished by using "first", "second" and the like, and the person skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order.

[0023] In order to solve the control problem existing in the pneumatic conveying system in the prior art, the utility model provides a control device of a pneumatic conveying system based on power carrier communication technology, Figure 1 It is a schematic view of the control device of the pneumatic conveying system based on the power carrier communication technology in the embodiment of the utility model, as shown in the figure, the device includes: man-machine interaction module 1, main controller 2, multiple sub-controllers 3, multiple sensors 4, multiple actuators 5, power supply equipment 6; Figure 1

[0024] Man-machine interaction module 1 is electrically connected with main controller 2, man-machine interaction module 1 is used for receiving the data input by the user, first carrier communication module 7 is arranged in main controller 2, and main controller 2 is used for carrying out data interaction with sub-controller 3 through first carrier communication module 7; Man-machine interaction module 1 and main controller 2 are installed at the first designated position away from the first preset distance of the pneumatic conveying system;

[0025] Second carrier communication module 8 is arranged in each sub-controller 3, first carrier communication module 7 and second carrier communication module 8 arranged in each sub-controller 3 are communicated through power line 9; Each sub-controller 3 is installed at the second designated position away from the second preset distance of the pneumatic conveying system; Sub-controller 3 is used for: receiving the data transmitted by sensor 4, carrying out data interaction with main controller 2, and transmitting data to actuator 5;

[0026] Multiple sensors 4 are connected with sub-controller 3 respectively, and sensor 4 is installed at the monitoring position of the pneumatic conveying system;​

[0027] The plurality of actuators 5 are connected to the sub-controllers 3 respectively, and the actuators 5 are installed at multiple positions of the pneumatic conveying system pipeline, and the actuators are used to adjust the conveying process of the material;

[0028] The power supply device 6 is connected to the human-computer interaction module 1, the main controller 2, the plurality of sub-controllers 3, the plurality of sensors 4 and the plurality of actuators 5.

[0029] In an embodiment, the power supply device 6 can be a transformer, which provides power supply for the entire control device.

[0030] The main controller 2 is mainly responsible for scheduling and control of the entire control device, and performs data interaction with each sub-controller 3 through the first carrier communication module 7.

[0031] In an embodiment, the human-computer interaction module 1 includes a touch screen and an indicator light, and the human-computer interaction module 1 is used to display the state and parameters of the control device of the pneumatic conveying system, and provide an operation interface for the user to set parameters and control the system.

[0032] The touch screen is used to display the state and parameters of the control device of the pneumatic conveying system, such as the valve switch state, the conveying pressure value, the medium flow and other common operating parameters of the existing pneumatic conveying system, and through the viewing of these operating parameters, the stable operation and efficient conveying of the system can be ensured; and an operation interface is provided for the user to set parameters and control the system, for example, the alarm value or threshold value of the conveying pressure and the medium flow can be set through the touch screen, and the valve can be remotely switched.

[0033] The indicator light is used to display the operating state of the control device of the pneumatic conveying system, such as normal operation and fault alarm.

[0034] The main controller 2 can be installed in a control cabinet away from the pneumatic conveying system, and the human-computer interaction module 1 is installed on the panel of the control cabinet, which is convenient for the operator to operate.

[0035] Reference Figure 1 , the first preset distance can be greater than the second preset distance. For example, the human-computer interaction module 1 and the main controller 2 are far away from the site of the pneumatic conveying system, for example, 400m-500m, and the sub-controller 3 is slightly closer to the site of the pneumatic conveying system, for example, 20m-30m.

[0036] The sub-controller 3 is used to receive the monitoring signal of the sensor 4, transmit the monitoring signal to the main controller 2, receive the data transmitted by the main controller 2, distribute the data transmitted by the main controller 2 to the corresponding I / O interface channel, and then drive the actuator through the I / O interface channel to realize the switching operation of the actuator and other functions.

[0037] Figure 2For a specific example of the control device of the pneumatic conveying system based on the power carrier communication technology in the embodiment of the utility model, refer to Figure 2 The control device is mainly connected through the power line with the transformer, the main controller 2, the sub-controller 3 and the like, and transmits data through the first carrier communication module 7 and the second carrier communication module 8.

[0038] The sensor 4 is used to monitor various parameters in the pneumatic conveying system in real time, and convert the monitored signals into electric signals, and the sensor 4 includes but is not limited to one or any combination of a pressure sensor, a flow sensor and a level sensor.

[0039] The pressure sensor is used to monitor the pressure change in the pneumatic conveying system in real time, and convert the pressure signal into an electric signal.

[0040] The flow sensor is used to monitor the flow change in the pneumatic conveying system in real time, and convert the flow signal into an electric signal.

[0041] The level sensor is used to monitor the level change in the pneumatic conveying system in real time, and convert the level signal into an electric signal.

[0042] The actuator 5 is used to receive the data transmitted by the sub-controller, specifically the control signal, and perform corresponding operations.

[0043] In an embodiment, the first carrier communication module 7 and the second carrier communication module 8 can be modems, and the modems can modulate digital signals into high-frequency signals and transmit through the power line, and demodulate the received high-frequency signals into digital signals.

[0044] In an embodiment, the sub-controller 3 further includes an I / O interface, and the I / O interface is connected with the sensor 4 and the actuator 5.

[0045] In the embodiment of the utility model, the main controller 2 and the sub-controller 3 have basically similar internal structures, and in addition to the carrier communication module, they can also include:

[0046] The microprocessor is used to receive and process data, and the processing data is all existing data processing technology, for example, filtering and noise reduction, comparing the conveying pressure value and the medium flow with the set threshold value to determine whether the system runs in the normal range, to determine whether to alarm, to distribute the I / O interface and the like.

[0047] The memory is used to store the common operating parameters of the pneumatic conveying system, such as the conveying valve switch state, the conveying pressure value, the medium flow and the like.

[0048] The I / O interface is used to transmit data through the I / O interface, for example, to realize the monitoring of the sensor and the actuator.

[0049] In an embodiment, the actuator comprises an electric valve, and / or a pneumatic valve.

[0050] The electric valve is used to receive signals sent by the sub-controller and adjust air flow in the pneumatic conveying system.

[0051] The pneumatic valve is used to receive signals sent by the sub-controller and adjust material in the pneumatic conveying system.

[0052] In an embodiment, the sensor is installed at a position to be monitored on the bin pump and / or pipeline of the pneumatic conveying system.

[0053] When the control device of the pneumatic conveying system based on the power carrier communication technology is installed, the following steps are included:

[0054] The main controller is installed in the control cabinet and connected with the power line through the first carrier communication module;

[0055] The sub-controller is installed at a suitable position;

[0056] The actuator is installed at multiple positions of the pipeline of the pneumatic conveying system;

[0057] The sensor is installed on the bin pump and pipeline of the pneumatic conveying system;

[0058] The human-computer interaction module is installed on the panel of the control cabinet;

[0059] The modules or parts are connected and powered through the transformer.

[0060] When the control device of the pneumatic conveying system based on the power carrier communication technology is operated, the following steps are included:

[0061] The sensor monitors parameters such as pressure, flow, and material level in the pneumatic conveying system in real time, converts the monitored signals into electric signals, and transmits the electric signals to the sub-controller through the I / O interface.

[0062] The sub-controller receives the signals of the sensor, transmits the signals of the sensor to the main controller through the second carrier communication module.

[0063] The main controller interacts with the sub-controllers through the first carrier communication module.

[0064] The actuator receives signals sent by the sub-controller and performs corresponding operations, such as adjusting the opening degree of the valve, opening and closing the valve, etc.

[0065] The human-computer interface module displays the state and parameters of the whole system and provides an operation interface for the user to set parameters and control the system.

[0066] Compared with the prior art, the embodiment of the utility model has the following technical effects:

[0067] 1. Low cost: using power lines as communication medium, no additional wiring, reducing the cost.

[0068] 2. Easy to install: power carrier communication module is directly installed on the power line, easy to install, reducing the construction difficulty.

[0069] 3. Strong anti-interference ability: power carrier communication technology has strong anti-interference ability, can run stably under complex working conditions.

[0070] 4. Good real-time performance: power carrier communication technology has high transmission rate, can realize real-time monitoring and control.

[0071] 5. Strong expansibility: modular design, easy to expand and upgrade.

[0072] The storage, control, calculation and other algorithms involved in the utility model are all existing technologies in the field, and the skilled person in the art can realize the storage, control, calculation and other algorithms involved in the utility model without creative labor.

[0073] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above is only a specific embodiment of the utility model and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A control device for a pneumatic conveying system based on power line carrier communication technology, characterized in that, include: Human-computer interaction module, main controller, multiple sub-controllers, multiple sensors, multiple actuators, power supply equipment; The human-machine interaction module is electrically connected to the main controller. The human-machine interaction module is used to receive data input by the user. The main controller is equipped with a first carrier communication module. The main controller is used to interact with the sub-controller through the first carrier communication module. The human-machine interaction module and the main controller are installed at a first designated position at a first preset distance away from the pneumatic conveying system. Each sub-controller is equipped with a second carrier communication module. The first carrier communication module is connected to the second carrier communication module in each sub-controller via a power line. Each sub-controller is installed at a second designated position at a second preset distance away from the pneumatic conveying system. The sub-controller is used to: receive data transmitted by sensors, interact with the main controller, and transmit data to the actuator. Multiple sensors are connected to the sub-controller, and the sensors are installed at the monitored locations on the pneumatic conveying system. Multiple actuators are connected to a sub-controller and are installed at multiple locations in the pneumatic conveying system pipeline. The actuators are used to regulate the material conveying process. The power supply unit connects to the human-machine interface module, the main controller, multiple sub-controllers, multiple sensors, and multiple actuators.

2. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The main controller is installed inside the control cabinet, and the human-machine interaction module is installed on the control cabinet panel. The human-machine interaction module includes a touch screen and indicator lights.

3. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The first preset distance is greater than the second preset distance.

4. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The sensor includes one or any combination of a pressure sensor, a flow sensor, and a level sensor.

5. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The actuator includes an electric valve and / or a pneumatic valve.

6. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The location to be monitored is located on the silo pump of the pneumatic conveying system, and / or on the pipeline.

7. The control device for a pneumatic conveying system based on power line carrier communication technology as described in claim 1, characterized in that, The sub-controller also includes an I / O interface, which is connected to sensors and actuators.

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