SU640346A1 - Multipoint indication device - Google Patents

Description

one

The invention relates to signal automation and can be applied in any industry when building multipoint control systems with individual flashing alarms.

Relay devices for multipoint alarms are known, containing a pulse generator, an audible alarm, test and test buttons, and a series of on-line signal cells consisting of a sensor, a warning lamp, a relay or a thyristor, resistors and diodes

one.

The closest of the known technical solutions to the proposed one is a device for multipoint signaling, containing the number of control points closing contact sensors connected in series with one windings of the first relay and the switching contact of the contact group of the second relay, the windings of which are connected to the closing contacts of the contact groups and the power supply The other windings of the first and second relays are connected to the power supply terminals through the closing contacts of the acknowledge buttons and the test buttons, respectively, buzzer and pulse generator 2.

The disadvantages of these devices include the presence of common control elements, which leads to the emergence of galvanic bonds between the cells when the parameters of the uncoupling elements change. In addition, when creating circuits with a large number of controlled points, the reliability of such devices drops dramatically due to the large number of elsmept components.

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

For this purpose, the third and fourth relays are introduced into the device, the windings of which are connected in series with the output of the pulse generator to the combined opening contacts of the contact groups of the second relay and the power bus, the switching contact of the contact group of the third relay is connected to the power bus, the break contact of this group is connected to the pulse generator , and closing - to the audible alarm, the closing contact of the fourth relay is connected in parallel with the acknowledge button.

The drawing shows the schematic diagram of the proposed arrangement.

The device contains, according to the number of control points, closure contact sensors 1 connected in series with one: windings 2 first relays n switching contact 3 contact groups 4 and second relays, windings 5 of which are connected to closure contacts 6 in contact group 4 and bus 7 nntani. Friendly the windings 8 of the first relay and the other windings 9 of the second relay are connected to the power supply buses 10 and 11, respectively, via a lock, and the contacts of the acknowledgment button 12 and the test button 13.

The closing contact 14 of the relay 15 forms the output of the pulse generator, which contains a capacitor 16 connected in parallel to the winding of the relay 15 and a resistor 17 connected in series with this winding. The winding 18 of the third relay and the winding 19 of the fourth relay between the auxiliary cable are connected in series with the output of the pulse generator (closing contact 14). 7 power supply and combined breaking contacts of 20 contact groups 4. The switching contact 21 of the contact ground, 22 of the third relay is connected to the power bus 7, the break contact 23 of the contact group 22 - to the pulse generator resistor 17, and the closing contact 24 to the acoustic signaling device (shown in the drawing is the control circuit from the resistor 25, winding the relay 26 with contact 27), the closing contact 28 is connected in parallel with the acknowledgment button 12.

The closing contacts of 28 nerve relays are included in the circuit of the individual signal lamps 29.

The device works as follows.

When turned on, the winding of the relay 15 receives power through the opening contact 23, the closing contact 14 is activated. When the contact of sensor 1 is closed, the current through the windings 2, 19, 18 turns on the corresponding relays, the corresponding warning lamp 29 turns on through contact 28, the switching contact 22 turns on, which turns on the buzzer by contact 27.

After the capacitor 16 is discharged through the winding of the relay 15, it releases, its contact 14 is opened, the current through the windings 2, 19, 18 disappears, the signal lamp 29 goes out. Contact group 22 returns to its original state, and through closed contact 21 and resistor 17, capacitor 16 is charged until the relay 15 is activated.

Pressing the acknowledgment button 12 triggers the first relays according to their

the windings 8. the switching group 4 is activated, which puts the signal lamp 29 in the quiet burning mode.

The second relay is self-blocked by winding 5 until the accident is cleared, and the generator goes into running mode.

The absence of common control busbars and galvanic connections between cells makes it possible, when leaving one of them, to carry out a nonstop transition to a backup one, which allows the circuit to be operated on reed switches in a sealed version with terminal ends on terminals or connectors. This eliminates a significant portion of operating expenses and simplifies devices at an industrial facility.

The absence of galvanic connection between the control circuit and signal lamps allows the device to be equipped with various indicators.

Claims (2)

Invention Formula A device for multipoint signaling, containing, by the number of control points, closing contact sensors connected in series with one windings of the first relay and the switching contact of the contact group of the second relay, windings of which are connected to closing contacts of contact groups and power supply bus; other windings of first and second relays are connected to power buses through closing contacts of acknowledgment buttons and test buttons, respectively, an audible alarm and a pulse generator, in order to increase the device reliability, he entered the third n the fourth relay winding which are connected in series with the output of the pulse generator to the combined opening contacts of the contact groups of the second relay and the power bus switching the contact of the contact group The third relay is connected to the power bus, this contact is connected to the pulse generator, and the closing one is connected to the audible alarm device; the closing contact of the fourth relay is connected parallel to the acknowledge button. Sources of information taken into account at the examination 1. USSR author's certificate No. 488240, cl. G 08 B 21/00, 1973. 2. USSR author's certificate number 415686, cl. G 08B 25/00, 1972. G. R