SU628518A1

SU628518A1 - Fire alarm

Info

Publication number: SU628518A1
Application number: SU772478979A
Authority: SU
Inventors: Владимир Петрович Цабель
Original assignee: Особое конструкторское бюро противопожарной техники
Priority date: 1977-04-25
Filing date: 1977-04-25
Publication date: 1978-10-15

Description

Изобретение предназначено дл использовани в установках тревожной сигнализации , в частности, в установках пожарной сигнализации. The invention is intended for use in alarm installations, in particular, in fire alarm installations.

Известно устройство тревожной сигнализации , содержащее датчики, соединенные с усилител ми, пол ризованное реле и сигнализатор . Недостатком его вл етс низка надежность.An alarm device is known, which contains sensors connected to amplifiers, a polarized relay and a warning device. The disadvantage of it is low reliability.

Наиболее близким техническим решени- ем к данному изобретению 5гол етс устройство дл пожарной сигнализации, содержащее реле тревожной сигнализации, реле сигнализации обрыва, реле переключени пол рности и датчики, параллельно размыкающим контактам которых подключены диоды 2,The closest technical solution to this invention is a fire alarm device comprising a alarm relay, a break alarm relay, a polarity relay and sensors, in parallel with the disconnecting contacts of which diodes 2 are connected,

Недостатком такого устройства вл етс также его низка надежность.The disadvantage of such a device is also its low reliability.

Целью изобретени вл етс повышение надежности устройства дл пожарной сигнализации .The aim of the invention is to improve the reliability of the fire alarm device.

Это достигаетс тем, что в предлагаемое устройство введен транзисторный ключ с дополнительным реле в коллекторной цепи , управл ющий вход транзисторного ключа соединен с источником питани через последовательно соединенные переключеиощие контакты реле переключени пол рности , размыкающие контакты датчиков и реле тревожной сигнализации, реле переключени пол рности соединено с источником питани через замыкающий контакт дополнительного реле, параллельно реле переключени пол рности подключены последовательно соединенные размыкающий контакт реле тревожной сигнализации, замыкающий контакт реле переключени пол рности и реле сигнализации обрыва.This is achieved by the fact that a transistor switch with an additional relay in the collector circuit is inserted into the device, the control input of the transistor switch is connected to the power source through series-connected switching contacts of the polarity switching relay, disconnecting sensors and alarm relays, the switching polarity relay with a power source through the make contact of an additional relay, in parallel with the switching relay of the polarity connected in series connected times ykayuschy alarm relay contact, make contact relay switching polarity and breakage alarm relay.

На чертеже представлена принципиальна схема одного луча предлагаемого устройства дл пожарной сигнализации.The drawing shows a schematic diagram of a single beam of the proposed fire alarm device.

Claims

The device for fire alarm contains sensors 1 with diodes 2 connected in parallel to the disconnecting contacts of sensors, a transistor switch, consisting of transistors 3, electromagnetic relay 4, diode 5 and resistors 6-8, relay of polarity 9, alarm relay 10 and relay alarm signaling of the fault line 11. 362 When a message from the line (sensor 1 triggered, line wire dips), a negative potential appears at the base of transistor 3, causing it to saturate, causing relay 4 to trip. Rele 4 energizes relay 9 which with These switching contacts change the polarity of the supply voltage on sensors 1 of the beam set. If the line is in good condition, the signal passes through the shunt diode 2 of the activated sensor, causing an e-gkm triggering of relay 1O, which gives a Fire signal and opens the power supply circuit of relay 11. When the line is broken, relay 10 does not operate and relay 9 directly closes the power supply circuit of relay 11, which gives a signal line break. Turning off the device produced by the power supply voltage or turning off the activated beam and applying a positive potential to the base of transistor 3. A voltage divider on resistors 7-8 is designed to create a bias voltage at the base of transistor 3 and stabilize the operating point of the transistor. The economic effect of using the proposed device is determined by its technical advantages indicated above. Claims An Fire Alarm Device Containing an Alarm Relay. 84 break signaling relays, polarity switching relays and sensors whose diodes are connected in parallel with disconnecting contacts, characterized in that, in order to increase device reliability, a transistor switch with an additional relay in the collector circuit is inserted into it, the control input of the transistor switch is connected to the power supply through the series-connected switching contacts of the switching relay of the polarity, opening the contacts of the sensors and the alarm relay, the switching relay of the polarity is connected to the source com power through the auxiliary relay make contact, parallel relay switching polarity connected in series break contact connected alarm relay, closing the relay contact switching field () NOSTA and breakage alarm relay. Sources of information taken into account during the examination: 1. USSR author's certificate N ° 398873, cl. Q O8 B 17 / 1O, 1971.

2. Gerdovich Yu. I. et al. Automatic means of detecting and extinguishing a fire. M., stroiizdat, 1974, p. 82