SU587479A1

SU587479A1 - Fire alarm

Info

Publication number: SU587479A1
Application number: SU762402864A
Authority: SU
Inventors: Николай Георгиевич Николаев
Original assignee: Опытный Завод N 85 Гражданской Авиации
Priority date: 1976-09-01
Filing date: 1976-09-01
Publication date: 1978-01-05

Description

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Изобретение относитс к устройствам сигнализации и может примен тьс дл сигнализации игшичи пламени в топочных установках.The invention relates to signaling devices and can be used to signal ignition flames in furnaces.

Известны устройства дл сигнализации о наличии пламени. , Одно из них содержит фоторезистор, koтopый соединен с базой транзистора .и управл ет им в зависимости от ос ещениости при наличии пламени Devices for signaling the presence of a flame are known. , One of them contains a photoresistor, which is connected to the base of the transistor. And controls it depending on the ground in the presence of a flame

Недостатком его вл етс отсутствие посто нной сигнализёщии о налиЧ1ГИ или отсутствии пламени.The disadvantage of it is the absence of a constant signaling the presence or absence of a flame.

Наиболее близким по технической сущности вл етс сигнгшизатор пламени , содержащий фоторезистор, первый вывод которого непосредственно, а второй через резистор подключены к источнику питани 2.The closest in technical essence is a flame flame detector containing a photoresistor, the first output of which is directly, and the second through a resistor connected to the power source 2.

Однако и это устройство не дает посто нной сигнализации о наличии или отсутствии пламени, а также имеет недостаточную надежность.However, this device does not give a constant alarm about the presence or absence of a flame, and also has insufficient reliability.

Цель изобретени - расширение функциональных возможностей устройства достигаетс тем, что в устройство вйё .дены два однопереходных транзистора, два трансформатора, два конденсатора, диод и три резистора, один полюс истоника питани подключен через второй The purpose of the invention is to expand the functionality of the device by ensuring that the device has two single-junction transistors, two transformers, two capacitors, a diode and three resistors, one pole, and the power supply is connected through the second

резистор к первому электроду первого однопереходного транзистора, эмиттер и второй электрод которого соединены соответственно с первым и выводами фоторезистора, параллельно которому включены последовательно соединенные первый конденсатор и первична обмотка первого трансформатора, вывод средней точки фоторезистора подключен через диод к эмиттеру второго однопереходиого транзистора, первый электрод которого соединен через третий резистор со вторым электродом первого однопереходного транзистора, второй электрод второго однопереходного транзистора соединен с другим полюсом источника питани и через последовательно соединенные обмотку второго трансформатора и второй кондесатор , параллельно которым подключен четвертый резистор, соединен с его эмиЛером, вторичные обмотки трансформаторов соединены с выходами сигнализатора пламени.a resistor to the first electrode of the first single junction transistor, the emitter and the second electrode of which are connected respectively to the first and the photoresistor terminals, in parallel with which the first capacitor and the primary winding of the first transformer are connected in series, the center point of the photoresistor is connected via a diode to the emitter of the second single junction transistor, the first electrode of which connected via a third resistor to the second electrode of the first unijunction transistor; the second electrode of the second single junction the transistor transistor is connected to the other pole of the power source and through a series connected winding of the second transformer and a second condenser, in parallel with which a fourth resistor is connected, is connected to its e-laser, the secondary windings of transformers are connected to the flame detector outputs.

На чертеже представлена приниципиальна схема предлагаемого сигнализатора пламени.The drawing shows the municipal scheme of the proposed flame detector.

Claims

The flame detector consists of two relaxation generators, which contain unijunction transistors 1 and 2, in the circuits of the electrodes of which, respectively, capacitors 3 and 4 are connected in series with the windings of transformers 5 and 6, and in parallel with them is a photoresistor 7 and a resistor 11. Average output the points of the photoresistor 7 are connected via diode 12 to the emitter of transistor 2. Transistors 1 and 2 are connected in series in power, so that the minus of the power of one transistor is connected to the positive power of the other transistor, and transistors 1 and 2 enes with the power source through the resistors 9 and 10. Diode 12 provides sk isolator emitter circuits of transistors 1 and 2. Warning operates as follows. When the photoresistor 7 is illuminated, the emitter of the transistor 1 and the capacitor 3 through the voltage divider formed by the photoresistor 7 and the resistor 8 are supplied with a voltage less than the turn-on voltage of transistor 1, and the emitter of the transistor 2 and the capacitor through the voltage divider formed by part of the photoresistor 7 and a resistor 11, supplying sufficient voltage to turn on the transistor, which leads to the discharge of the capacitor 4 through the open transition of the emitter-electrode electrode of the transistor 2 and the winding of the transformer 6. From the secondary winding of the transformer 6 imaets Plum pulse is. If the photoresistor 7 is not illuminated, then the emitter of the single junction transistor 1 and the capacitor 3 plate are energized to turn on transistor 1 and discharge the capacitor 3 through the open junction of the emitter-electrode transistor 1 and a transformer winding 5. A pulse is removed from the secondary winding of a transformer 5 Plum is absent The claims of the flame detector containing a photoresistor, the first terminal of which is directly and the second The first resistor is connected to a power source, characterized in that, in order to expand the functionality and increase the reliability of the detector, two single-junction transistors, two transformers, two capacitors, a diode and three resistors are introduced into it, one pole of the power source is connected via a second resistor to the first electrode of the first single junction transistor, the emitter and the second electrode of which are connected respectively to the first i and second pins of the photoresistor, which are connected in parallel with the common first capacitor and the primary winding of the first transformer, the midpoint terminal of the photoresistor is connected via a diode to the emitter of the second single junction transistor, the first electrode of which is connected via a third resistor to the second electrode of the first single junction transistor and connected to the other pole of the power source and sequentially the connected primary winding of the second transformer and the second capacitor, in parallel with which, the fourth re is connected Istoiya, its emitter connected to the secondary windings of the transformers are connected to the outputs of the flame signaling. I Sources of information taken into account in the examination: 1. Author's certificate 382120, Q 08 B 5/22, 27.10.70.

2. The copyright certificate №362331, G 08 B 17/10, 22.01.71.

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