RU41886U1 - ELECTRICAL EXECUTIVE MECHANISM CONTROL SYSTEM - Google Patents

Abstract

The utility model relates to the automation of technological processes, and can be used to position the actuating electric mechanism of the MEO by the operator in manual mode, in remote control mode via a radio channel or a computer via a digital communication channel. The control system of the actuating mechanism MEO, comprising a reversing contactor equipped with control inputs "more" and "less", the input of which is connected to the supply voltage, and the output motor of the mechanism MEO, which is connected to the position sensor of the actuator, characterized in that it a block of switches has been introduced, equipped with outputs “more” and “less”, and four inputs: first, second, third and fourth, manual control buttons: “more” and “less”, first and second switches p hedgehogs work; a radio receiving device for control signals equipped with “more” and “less” outputs and a device for receiving controller control signals equipped with “more” and “less” outputs and a digital communication channel were introduced, moreover, the “more” and “less” outputs of the radio receiving device and device the receiving control signals of the controller are connected to the first and second, to the third and fourth inputs of the switch block, respectively, a power source connected to the reversing contactor to the radio receiving device is introduced into the system at the control signals, to the device receiving control signals of the controller, to the indicator of the position of the mechanism, and introduced the indicator of the position of the MEO connected to the output of the position sensor of the actuator.

Description

The proposed utility model relates to automation, in particular, to devices for monitoring and regulating technological parameters and can be used for positioning MEO actuating electric mechanisms in automatic process control systems.

Known devices for monitoring and regulating technological parameters [1], which contain reverse contactor blocks in the nomenclature — contactless reversing starters — FGPs equipped with control inputs “greater” and “less”, an input for connecting the supply voltage and an output for connecting an MEO motor, manual blocks controls, setpoint adjusters, power supplies, control units, transmitters, position indicators.

The disadvantage of the devices [1] is their low functionality and the need to carry out design work at the automation object to create a control system for the executive electric mechanism of the MEO.

The known device [2] is intended to output discrete signals through a serial digital communication channel. The disadvantage of the device [2] is its low functionality.

The purpose of the proposed utility model is to create a functionally complete control system for the electric actuator with advanced functionality. This goal is achieved by the fact that in the device containing the reversing contactor with the control inputs “more” and “less”, the power input and the output to the MEO electric motor, a block of switches is equipped with outputs “more” and “less”, the first, second, third and the fourth inputs, the position indicator of the actuator, the control buttons "More" and "Less", the first and second switches, and the outputs "more" and "less" of the switch are connected to the same inputs of the reversing starter, and the output of the ME position sensor О connected to the indicator of the position of the MEO, introduced a radio receiver and a transmitter of discrete signals and a device for outputting discrete signals connected to a digital communication channel with

the controller and the power source connected to the reversing contactor, to the MEO position sensor, as well as to the radio receiving device and the device for outputting discrete signals.

The closest in technical essence and the achieved effect - the prototype of the proposed system is a contactless reversing FBI starter from the nomenclature according to the source [1].

Figure 1 shows a block diagram of the proposed control system of the electric actuator MEO, figure 2 is a fragment of the control system of the actuator electric actuator, figure 3 is an example implementation of a block of switches.

The presented Figures show:

1 - actuator MEO,

2 - electric motor MEO,

3 - sensor position MEO,

4 - reversing contactor,

5 - voltage source,

6 - switch block,

7 - control button "More" - B,

8 - control button "Less" - M,

9 - control mode switch: "manual" - P, "remote" - D,

10 - control mode switch: "radio" - RP, "receiver of the controller signals" - UCS,

11 - pointer position MEO,

12 - device radio receiving control signals,

13 - a device for transmitting control signals,

14 - a device receiving control signals of the controller,

15 - controller

16 - power source,

17 - communication line of the device 14 and the controller 15,

18 - three-position relay.

The flow of active control signals is presented in FIG. 2. The system has three active modes of operation and operates as follows

1. Manual operation. This mode is provided by moving the switch 9 to the position - P. In this mode, when the button 7 is pressed “More”, the output “more” of the switch block receives a control signal, which passes to the input “more” of the reversing contactor and provides connection of the power supply to the block 5 to the input of the MEO electric motor, which moves in the “greater” direction. When you press the Less button, the MEO moves in the less direction. Releasing the More or Less button causes the MEO to stop. By pressing the More and Less buttons simultaneously, the MEO motor remains off.

2. The mode of operation from a device for transmitting discrete signals. To do this, switch 9 must be moved to the "remote" position - D, and switch 10 should be moved to the "Radio" position - RP. With this position of the switches 9 and 10, the active signals “more” and “less” from the outputs of the radio receiver 12 pass through the block of switches 6 to the control inputs “more” and “less” of the reversing contactor 4 and the MEO works in the same way as from the buttons “ More ”and“ Less ”switch 6.

3. The operation mode from the controller signals. To do this, switch 9 must be moved to the remote position - D, and switch 10 to the position "controller signal receiver" - UCS. In this case, the active control signals “more” and “less” from the same outputs of the receiver of the controller signals pass to the control inputs “more” and “less” of the reversing contactor 4 similarly to mode 2.

To remotely control the MEO with analog current I _dist , a three-position relay with a dead band with outputs “greater” and “less” and the first and second inputs of analog signals has been introduced into the MEO control system. The outputs “greater” and “less” of the three-position relay are connected to the third and fourth inputs of the switch block, and the remote analog signal and the feedback signal U _{os of the} MEO position sensor, respectively, are connected to the first and second inputs of the three-position relay.

The proposed utility model provides all the basic control modes and the control of the execution of control commands: in manual mode, the operation of the MEO is checked by the position indicator, in remote mode by the commands of the radio transmitting device, the effect of the MEO on the executive body is checked, in the control mode from the controller's signal receiving device, the implementation is checked

complex controller control algorithms in automatic mode. Each of the MEO control modes is necessary at the stage of implementation of the automatic control system, during regular operation of the system and during preventive maintenance.

The Magic system, MSRF-3K kit [3] was used as a radio transmitter and radio receiver of control signals, a device [2 | was used as a receiver of control signals of the controller.

A reversing contactor, a block of switches with an indicator of the MEO position, a radio receiving device for control signals, a device for receiving control signals of the controller and a power source are located in a single housing and are a functionally complete product - a control unit, a reversible BUR.

The receiver of the control signal of the controller may contain software and hardware to receive the analog signal of the position of the MEO or the signal of the adjustable parameter, and the implementation of the laws of control of the relay controller, in proportion to the integral differential (PID) controller, and give control signals “more” and “less” on it outputs in accordance with specified regulatory laws.

Thus, the proposed utility model of the control system for the actuating mechanism of the MEO is new, has an inventive step and provides wide functionality that allows controlling in various situations and under normal conditions to control the actuating mechanism of the MEO in accordance with the required regulation law for the technological process. The proposed system can be widely used in ferrous and non-ferrous metallurgy and other industries.

Literature:

1. Catalog of the electronic-mechanical plant, Cheboksary, 2003

2. Catalog of modules 1-7000, module 7042, company ICP CON, 2000.

3. MAGIC SYSTEMS, dynamic code remote control system, MSRF-3K. 2000 year

Claims (5)

1. The control system of the actuating electric mechanism MEO (single-turn electric mechanism), comprising a reversing contactor equipped with control inputs “more” and “less”, the input of which is connected to the supply voltage, and the electric motor of the MEO mechanism is connected to the output, which is connected to the position sensor of the executive mechanism, characterized in that a switch block is introduced into it, equipped with “more” and “less” outputs and four inputs: first, second, third and fourth, manual control buttons: “more ”And“ less ”, the first and second switches of the operating modes, introduced a device for receiving control signals equipped with outputs“ more ”and“ less ”and a device for receiving control signals of the controller equipped with outputs“ more ”and“ less ”and a digital communication channel, the outputs “more” and “less” of the radio receiving device and the device receiving the control signal of the controller are connected to the first and second, third and fourth inputs of the switch block, respectively, a power source is introduced into the system connected to a reversing contactor, to a device for receiving control signals, to a device for receiving control signals of the controller, to a position indicator of the mechanism, and an MEO position indicator connected to the output of the actuator position sensor is introduced. 2. The system according to claim 1, characterized in that a three-position relay with a dead band, outputs “more” and “less”, the first and second inputs of analog signals is inserted into the third and fourth inputs of the switch block, respectively, the outputs “more” are connected and “less” of the three-position relay, and the remote analog control signal and the feedback signal of the MEO position sensor, respectively, are connected to the first and second inputs of the three-position relay. 3. The system according to claim 1, characterized in that the device receiving control signals of the controller is additionally equipped with an analog input connected to the output of the MEO position sensor and a program that implements a relay or proportional-integral-differential control law. 4. The system according to claim 1, characterized in that a radio transmitting control signal device and a microprocessor are connected thereto, connected by a digital data transmission channel to a device receiving control signal of the controller. 5. The system according to claim 1, characterized in that the reversing contactor, the switch unit, the radio receiving device of the control signals, the receiving device of the control signal of the controller, the power source and the position indicator MEO are placed in a single housing.