SU723636A1 - Emergency warning device - Google Patents

Description

(54) DEVICE FOR ALARM SIGNALING

I

The invention relates to emergency protection devices and signaling devices and can be used in the power engineering, chemical, metallurgical, mining and other industries in the control of the health of signaling circuits.

There are known devices for signaling alarm conditions, comprising a logic unit, a control unit, a real-time reference unit and a display unit in which a comparison unit and an analysis unit are installed, the first input of which is connected to the first output of the logic unit, the second input of the analysis unit is connected via the control unit to the second B1 1 input of the logical unit, the output of which is connected to the input of the control unit and the output of the analyzer unit through the series-connected real-time reference unit and the comparison unit no, nK.4KJ4eH to b eye of the entrance indikashsh OQ.

However, the known devices are not reliable in operation.

An alarm device is known that contains an alarm receiving relay connected to the bus, powering through the sensor contact closed during normal installation, intermediate relays, warning lights connected to the power supply via the trip contacts of the corresponding alarm receiving relay, and actuator control circuit 2j.

However, in the known device there is no possibility to test the signal lamps and the relay circuit of the device, which

5 entails in the event of their refusal the loss of information about the occurrence of an emergency.

The purpose of the invention is the possibility of simultaneous

Claims (2)

0 checks for correcting the warning lamps and the relay circuit of the device during its operation, i.e. increase the reliability of the device. 372 The goal is achieved by the fact that the protection relay and the actuating element are connected to the power source through make contacts, respectively, control buttons and relays are sewn up, and the power supply lines are connected to a voltage source through the break contacts of the test relay, which is connected in parallel to the protection relay through its make contact. A schematic diagram of an alarm device is shown in the drawing. The device contains a sensor 1, an alarm receiving relay 2, signal lamps 3, an actuating element 4 a control button 5, a protection relay 6, a check relay 7, a power supply 8, an emergency shutdown button 9, and a voltage source 1O. The device works as follows. When operating the device, the circuit parameters must be within the normal range. In this case, the contacts of sensors 1 are closed, the windings of the alarm receiving relay 2, the current flows and its closing contacts in the circuit of signal lamps 3 are open, and the closing contacts in the control circuit of the actuating element 4 are closed. In case of malfunction of the device, i.e. when one of the couple of years goes out of norm, the contacts of sensor 1 open and the alarm 2 is received. The breaking contacts of this relay in the signal lamp circuit 3 are closed and the closing contacts in the control circuit of the actuating element 4 is open. the lamp of the corresponding parameter, and the actuating element, for example, blocks the flow of gas. To test the signal lamps 3 and the relay circuit of the device, it is necessary to press the control circuit 5. The winding of protection 6 flows around the current, its closing contacts in the circuit of the winding of the test relay 7 and the executive circuit 4 are closed. At the same time, first the voltage goes to the actuator 4 and then with a time delay, the contact groups will work on the conditional time, on the winding of the check relay 7, Dissolving contacts work: its test relay 7 removes the voltage from the power supply 8 and thereby de-energizes the windings of the relay receiving an emergency ignition 2. The opening contacts of this barely in the circuit of the signal lamps 3 are closed the lamps are hot, and the closing contacts of the control circuit of the actuating element 4 are open, but the execution element remains in the working position, since it is connected to the voltage source through the closed contact of the protection relay 6. When the control button 5 is released, the test relay 7 and the protection relay 6 are fused. At the same time, the power supply voltage 8 is applied, and then the voltage is removed from the actuator 4. This is ensured by the fact that the contacts of the protection relay 6 are triggered with an open time delay. The invention of the device for an alarm containing an alarm receiving relay, which is connected to the ladders through a normally closed contact, an alarm lamp connected to the power supply through the opening contact of the alarm receiving relay, an actuator that is connected to the power supply cable in series the emergency shutdown button and the closing contacts of the alarm receiving relay, the control button and the checkout relay and the protection relay, characterized in that, in order to increase and the reliability of the device, the protection relay, and the actuator are connected to a power source via make contacts, respectively, control buttons and a protection relay, and the power buses are connected to a voltage source through a crushing contact test relay, which is connected in parallel to the protection relay through its closing contact. Sources of information taken into account during the examination 1. USSR author's certificate No. 581481, cl. QO8 B 21/00, 1976. 2. Skoreiky E. S. et al. Automation of heating systems. - Kiev, Tech nyka, 1974, p. 50-51 (npOTOTjm).