SU1377521A1 - Gas electric-kindling device - Google Patents

Abstract

The invention relates to power engineering and can be used in devices for automating gas ignition processes and controlling the presence of a flame. The purpose of the invention — extending the functionality of the device — is achieved by monitoring the presence of a flame and shutting off the gas supply in the absence of a flame. For this purpose, flame control relays 19, a button 1b with three pairs of contacts 17.18 and 25, a converter of 21 discrete signals into continuous and an electromagnetic valve 2b are added to the device. The drawing also shows a thyristor 1, a limiting resistor 2, a rectifying diode 3, a half-wave doubling circuit formed by a resistor 5, capacitors 6 and 8 by a diode 7, a burner 11, a threshold element 12 on a neon lamp, a pulse transformer 13, a storage capacitor 1 , - 15, relay 22 with contacts 23, circuit elements: resistors, capacitors, inputs and outputs. When the flame disappears from the circuit, the voltage is removed. And the valve 2b stops the gas supply. 1 il. 9

Description

about ol

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The invention relates to energy, in particular to the automation of gas ignition processes and the control of the presence of a flame.

The purpose of the invention is to expand the functional capabilities of the device by monitoring the presence of a flame and shutting off the gas supply in the absence of a flame.

The drawing shows a diagram of a pre-lagay device.

The device comprises a thyristor 1, the anode of which is connected via a limiting resistor 2 and a rectifying diode 3 to a first power bus connected to the first input terminal A of the power source. The cathode of the thyristor 1 is connected to the second power bus, i A half-wave doubling circuit is connected between the power buses and is formed in series connected by resistor 5i by the first capacitor 6, the first diode 7, the second capacitor 8. The anode of the first diode connected to the first capacitor 6 is connected to the cathode of the second diode 9 and is connected to an additional terminal 10 connected to the burner 11. The connection point of the cathode of the first diode 7 to the output of the second capacitor 8 is connected via a threshold element 12 (neon lamp) with a control thyristor 1. The thyristor 1 anode is connected by the first output of the primary winding of the pulse transformer 13, the second output of which is connected to the first output of the storage capacitor 14. The first output of the secondary winding of the switching transformer 13 is connected to the discharge 15 of the second output of the secondary winding of the pulse transformer connected with the second bus power. The first pair of contacts 17 of button 1b is connected between the second power bus and the anode of the second diode 9, the second pair of contacts 18 of the button 16. Connected between the second output of the storage capacitor 1 and the second power bus, parallel to the second pair of contacts 18 is connected the winding of the flame control relay 19, pins 20 of which are connected in parallel to the output of the converter 21 discrete signals to Continuous, equipped with a relay 22, contacts 23 of which are connected between the second power bus and the auto-220

A power supply input terminal 2, parallel to which a third pair of contacts 25 of button 1b are connected, solenoid valve 2b, a winding 27 of which is connected between the power buses.

The device works as follows.

When button 1b is pressed, alternating voltage is applied to the device through contacts 25. In this case, a diode 9 is connected to the circuit through the contacts 17, the coil is shorted by contacts 18

relay 19, turns on relay 22 of converter 21 and closes its contacts 23, turns on solenoid valve 26 supplying gas to the burner. The capacitors 6, 8 and 1 are then charged.

Upon reaching the threshold voltage on the capacitor 8, the threshold element 12 and the capacitor B are opened,

break through it along the control electrode circuit - the thyristor cathode,

launches it. The storage capacitor 14, discharging through an open thyristor to the primary winding of the transformer 13, induces in the secondary winding a high-voltage impulse voltage, which causes an electric spark discharge between the discharge capacitor 15 and the gas case (high-voltage) 11. The electric-spark bits are formed periodically, since after the capacitors 8 and 14 have been discharged, they are recharged and all processes are repeated.

If the gas supplied to the burner by the solenoid valve 2b ignites, the button 16 must be turned off. In this case, the contacts 17 disconnect the diode 9 from the circuit, the contacts 18 open, the IS relay coil is connected to the circuit, the contacts 25 open, the closed contacts 23 of the relay 22 continue to apply voltage to the device circuit, and instead of the diode 9 the secondary circuit is connected to the circuit the winding of the transformer 13, and therefore the flame connected to it. In this case, the capacitors 8 and 14 are charged, and the thyristor 1 is opened and the capacitor 14 is discharged through the thyristor to the primary winding of the transformer 13 and to the winding of the relay 19. But since the resistance of the winding of the relay 19 is several orders of magnitude greater than resistance of the first winding

 13

transformer, then the entire discharge voltage is applied to the winding of the relay 19, it operates and closes the contacts 20 for the duration of the discharge pulse. In the presence of a flame, these processes are repeated, and discrete signals are in the form of periodic closures and openings of contacts 20 of relay 19 Turned by a converter 21 into a continuous signal, holding the contacts 23 of relay 22 in a closed state as long as there is a flame. When a flame fails, discrete signals in the form of closures and openings of contacts 20 of relay 19 stop, the winding of relay 22 de-energizes, contacts 23 open and the voltage from the device circuit is removed. The solenoid valve 26 turns off and shuts off the gas supply to the burner.

When the button 1b is pressed again and then turned off, all processes are repeated.

Claims (1)

Invention Formula A gas electrical ignition device, containing a thyristor, the anode of which through a limiting -resistor is connected to the cathode of a rectifying diode, the anode of which is connected to the first power bus connected to the first input terminal, the cathode of the thyristor is connected to the second power bus, a single-wavelength polarization circuit formed by a resistor, the first output of which is connected to the first power bus, the second output - to the first output of the first capacitor, the second output of which is connected to the anode of the first diode, the cathode of which Through the second capacitor is connected, with the second power bus, the cathode of the second is connected to the anode of the first diode 7521. 6 diode, and the cathode of the first diode is connected via a threshold element to the control electrode of the thyristor, to the anode J of which the first output of the primary winding of the pulse transformer is connected, the second output of which is connected to the first output of the storage capacitor, one output of the secondary winding of the ignition coil is connected ng to the electrode , characterized in that, in order to expand the functionality by ensuring control of the 5th flame and turning off the gas supply in the absence of a flame, in us flame relay control button to the first, second and third pairs of contacts, discrete transducer 20 signals in continuous with the relay and the solenoid valve, the winding of the flame control relay is connected between the second output of the storage capacitor and the second power bus, first 25 a pair of contacts of the button is connected between the anode of the second diode and the second power bus, the second pair of contacts of the button is connected parallel to the winding of the flame control relay, a third of the pair 30 button contacts are connected between the second power bus and the second input terminal, the flame control relay contacts are connected in parallel to the output of the discrete ES signal converter, which is connected between the power buses, and its relay contacts are connected in parallel to the third button contacts, and the anode of the first diode is connected to the additional terminal connected to the burner, the second output of the secondary winding of the pulse transformer is connected to the second power bus, and the winding of the solenoid valve on podd5 soedi.nena between the power rails. Compiled by S. Borzikov Editor Yu. Petrushko Tehred L. Serdyukova Proofreader V. Girn to QklQ order Circulation 63 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Subscription