SU989594A1 - Device for remote control of electromagnetic drive - Google Patents

Description

one

The invention relates to schemes for the protection of electric machines against accidents, which are automatic. shutting down and directly reacting to a voltage drop or to a lack of voltage,

A device for remote control of an electromagnetic drive is known, comprising an electromagnet and a spool 1.

A disadvantage of this device is that it consumes active energy when the valve is open.

The closest in technical essence and the achieved result to the proposed is a device for remote control of an electromagnetic actuator, containing an electromagnet, a latch, closing and opening travel contacts, in which the fixed contact of the switching key serves to connect to the opening travel contacts, and

The movable contact is connected to the positive power supply bus, the disconnecting key, the fixed contact of which serves to connect to the closing track contacts, and the movable one is connected to the movable contact of the enabling key 2.

The disadvantage of this device is the uncontrollability of the electromagnetic drive in the remote control mode when the power supply voltage disappears, which reduces the reliability of the device.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device is equipped with a start element containing an electromagnetic relay, opening contacts, first, second and third closing contacts, a diode and a capacitor, the negative lining of which serves to connect the connecting point of the electromagnetic drive and the latch to the negative power supply bus , the positive plate through the opening contacts of the start element is connected to the fixed contact of the tripping key and through the diode in the right direction to the moving contact This turns the key connected via third make contacts with positive bus pit audio source, which is included in parallel of series-connected first electromagnetic relay and the switching contacts of the start member, the second closing contacts trigger element connected in parallel, lane vym closes the contact element ny ka. The drawing shows a schematic diagram of the device. The device contains a DC power source 1, start element 2, containing an electromagnetic relay 3 | first make contacts, second make contacts 5, switch on key 6, electromagnet 7, switch off key 8, latch 9 close switch 10 and disconnect 11 track contacts, capacitor 12, start switch contacts 13, third start element clocks KOH 1 and diode 15 The device works as follows. When the first closing contact of the start element k is closed, the coil of the relay 3 is retracted and the relay self-blocks with the second closing contacts 5. It supplies power to the common point of keys 6 and 8 through the third closing contacts of the start element 14, Initial position is closed. When the switch 6 is closed, the voltage is applied to the electromagnet 7, in this case; The electromagnet drive becomes on the latch and the track contacts 11 disconnect the current through the coil of the electromagnet 7. Simultaneously, through the contact circuit It, the diode 15 capacitor 12 is charged. When the supply voltage disappears, the relay 3 releases, the contacts 14 open, and the contacts 13 close. Since the track contact 10 is closed, the capacitor 12 is discharged to the latch 9. The electromagnet is activated and the valve is closed. Thus, the proposed device eliminates an emergency situation in the event of an open valve when the power supply voltage disappears, which increases its reliability in comparison with the prototype. Claims An apparatus for remote control of an electromagnetic drive comprising an electromagnet, a latch opening and closing ground contacts, the fixed contact of a switching key serving for switching to the closing travel contacts, and the moving contact is connected to a positive power supply bus, deactivating the key, the fixed contact of which serves to connect to the closing track contacts, and the movable is connected to the movable contact of the switching key, characterized in that, in order to Reliability, it is equipped with a start element containing an electromagnetic relay, opening contacts, first, second and third closing contacts, a diode and a capacitor, the negative lining of which serves to connect the connecting point of the electromagnetic drive and the latch connected to the negative power supply bus, the positive lining through the opening contacts of the start element it is connected to the fixed contact of the tripping key and through the diode in the conductive direction to the moving contact of the switching key connected via a third make contact with a positive power supply bus, in parallel with which a chain of series-connected electromagnetic relay and the first make contact of the start element is connected, with the second making contact of the start element connected in parallel with the first making contact of the start element. Sources of information taken into account in the examination 1. Industrial pipe fittings. Catalog - directory, h, 1, I960, p. 202, 2, Ibid., P. 170.

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Claims (1)

Claim A device for remote control of an electromagnetic drive that contains an electromagnet, a latch, opening and closing track contacts, the fixed contact of the enabling key used to connect to the tripping travel contacts, and the movable contact is connected to the positive power supply bus, which deactivates the key whose fixed contact serves to connect to the closing track contacts, and the movable is connected to the movable contact of the enable key, characterized in that, in order to increase reliability, it packed with a start element containing an electromagnetic relay, opening contacts, first, second and third closing contacts, a diode and a capacitor, the negative lining of which is used to connect an electromagnetic drive and a latch connected to the negative power supply to the junction point, the positive facing through the opening contacts of the element the start is connected to the fixed contact of the tripping key and through the diode in the conducting direction to the movable contact of the switching key connected through tert Secondary make contacts with a positive power supply bus, in parallel with which a chain of series-connected electromagnetic relays and first make contacts of the start element is connected, the second closing contacts of the start element are connected in parallel with the first closing contacts of the start element.