SU1417071A1 - Device for controlling closure member actuator - Google Patents

Abstract

The invention relates to control devices, in particular to electric control devices for a pneumatic-hydraulic drive of a gas valve. The purpose of the iso-Urrijr array is to increase the reliability of drive control. When the voltage is applied, the relay 2 is controlled by the high-resistance winding 7. The solenoid valve 10 with the winding does not work. When the button 3 is pressed, the motion relay 1 is activated, which is held through its closing contact 4 and short-circuit contact 5 of the relay 2 control. Through the contact 12 of the motion relay 1 and the low impedance winding 8 of the control relay, a voltage is applied to the winding of the valve 10. When the reverse command is given, the control button on the motion relay of another operation is given. In this case, contacts 6 are switched. The switching time of contacts 6 is sufficient to reliably release the solenoid valve with the valve winding 10. At the same time, the control relay does not release at the expense of the capacitor 11. I il. / yU7 (L

Description

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The invention relates to control devices, in particular to electric control devices for a pneumatic-hydraulic drive of a gas valve.

The purpose of the invention is to increase the reliability of drive control.

The drawing shows a schematic diagram of one half of the device for controlling the drive of the locking member.

Both halves of the opening and closing control devices have the same electrical circuits and contain the same elements: motion relay 1 and dual-control relays 2 controls. The winding of the motion relay 1 by one output is connected to the minus of the power source, and the other to the positive power source through the control button 3, and the series-connected locking contact 4 of the motion relay 1 and the closing contact 5 of the relay 2 control.

A series circuit consisting of the switching contacts 6 of the movement relay of the other half of the device, high resistance 7 and low resistance 8 windings of control relay 2, disconnecting contact 9 of the limit switch and winding of the solenoid of the electropneumatic valve 10, is connected between the positive and negative power sources.

Parallel to the high impedance winding 7 of the control relay 2 is a capacitor 11, and between the plus of the power source and the connection point of the high impedance 7 and low resistance 8 m windings of the control relay 2 and the capacitor 11, the closing contact 12 of the motion relay 1 is connected.

The device works as follows.

When the supply voltage is applied, the relay 2 controls;

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on the motion relay of another control operation. At the same time, pins 6 are switched, breaking the control circuit of the final switch, releases the motion relay 1, opens its contacts 5 and 12.

The switching time of the contacts 6 is sufficient to reliably release the solenoid 10 of the electropneumatic valve. However, due to the capacitor 11 of the relay 2, the control does not have time to release during the switching of the contacts 6, therefore there is no loss of information about the position of the end switch and the operability of the solenoid 10 of the electropneumatic valve.

By installing a capacitor in parallel with the high-resistance winding of the control relay and switching on the switching contacts of the motion relay of another control operation between the power source plus the high-resistance winding of the monitoring relay, the reliability of the drive control is greatly enhanced. Regardless of the variation in the valve release voltage values, the proposed device provides reliable release of the solenoid of the electropneumatic valve when the actuator is reversed.

Claims (1)

Invention Formula A device for controlling the actuator of the locking member, containing for each operation of controlling a motion relay with a closing contact, a control contact, a two-winding control relay with a high-resistance and low-resistance windings, an electropneumatic valve and terminals for connecting the limit switch break contact, and the motion relay winding contact 4. At the same time, the electromagnetic valve 5 is connected to the solenoid 10 through a control contact and does not work, because the winding 7 of the relay 2 of the high-resistance control. When the control button 3 is pressed, the motion relay 1 is activated, closing its contacts 5 and 12. Through the contacts 4 and 5, the motion relay 1 is kept in the actuated state until the end of the switching of the crane. When contact 12 is closed, the circuit is assembled through the low-resistance winding 8 of the relay 2 control and the contacts 9 of the limit switch to the winding of the solenoid 10 of the electro-povmatic valve, as a result of which the latter is activated. Closing the contact 12, bypassing the high-resistance winding 7, does not release the control relay 2, since at this time the current of the solenoid 10 of the solenoid valve flows through the low-resistance winding 8. The control relay 2 releases when the contact 9 of the limit switch is opened after completion of the crane switching operation. If in the process of switching the crane there is a need to reverse it, a command is given via the control button 40 45 water to connect the power source, the solenoid coil of the electro-pneumatic valve, the leads for connecting the open contact of the limit switch, the low-resistance coil of the two-winding control relay and the closing contact of the motion relay are connected in series, the series circuit connected to the power supply terminals with the closing contact of the motion relay, the first output of the high-resistance winding of the two-winding control relay is connected, distinguishing It is because, in order to increase the reliability of drive control, a switching contact clock group of a motion relay of another operation and a capacitor are inserted into the device, and the second output of the high-resistance winding of the control relay is connected to a moving contact of the switching contact group of a control relay of another operation, the fixed contacts of which 55 are connected to an output for connecting a power source, and a capacitor is connected in parallel with the high-resistance winding of the control relay. 1417071 0 0 five 0 on the motion relay of another control operation. At the same time, pins 6 are switched, breaking the control circuit of the final switch, releases the motion relay 1, opens its contacts 5 and 12. The switching time of the contacts 6 is sufficient to reliably release the solenoid 10 of the electropneumatic valve. However, due to the capacitor 11 of the relay 2, the control does not have time to release during the switching of the contacts 6, therefore there is no loss of information about the position of the end switch and the operability of the solenoid 10 of the electropneumatic valve. By installing a capacitor in parallel with the high-resistance winding of the control relay and switching on the switching contacts of the motion relay of another control operation between the power source plus the high-resistance winding of the monitoring relay, the reliability of the drive control is greatly enhanced. Regardless of the variation in the valve release voltage values, the proposed device provides reliable release of the solenoid of the electropneumatic valve when the actuator is reversed. Invention Formula A device for controlling the actuator of the locking member, containing for each operation of controlling a motion relay with a closing contact, a control contact, a two-winding control relay with a high-resistance and low-resistance windings, an electropneumatic valve and terminals for connecting the limit switch break contact, and the motion relay winding 5 through control contact connected to you five water to connect the power source, the solenoid coil of the electro-pneumatic valve, the leads for connecting the open contact of the limit switch, the low-resistance coil of the two-winding control relay and the closing contact of the motion relay are connected in series, the series circuit connected to the power supply terminals with the closing contact of the motion relay, the first output of the high-resistance winding of the two-winding control relay is connected, distinguishing This is because, in order to increase the reliability of drive control, a switching contact group of a motion relay of another operation and a capacitor are inserted into the device, and the second output of the high-resistance winding of the control relay is connected to a moving contact of the switching contact group of a control relay of another operation, the fixed contacts of which 5 is connected to a terminal for connecting a power source; in parallel with the high-resistance winding of the control relay, a capacitor is connected.