SU739311A1 - Pneumatic device for protection of municipal and domestic gas appliances - Google Patents

Description

(54) PNEUMATIC DEVICE FOR PROTECTION OF UTILITIES GAS DEVICES

one

The invention relates to the field of safety in the operation of household gas appliances.

A pneumatic device for protection of domestic gas appliances is known, comprising sensors of coding controlled parameters connected to a membrane-type actuating valve equipped with a start button connected via a pin to a spring-loaded nozzle gate of the control chamber 1.

A disadvantage of the known device is low reliability and impossibility of automatic operation.

The goal of avoiding security is to increase security.

The goal is achieved by the fact that the control chamber is double-membrane and is connected to the inlet of the actuating valve, with the start button mounted on one membrane of the chamber, and the valve on the other, the cavities of the control chamber are connected to one another by means of drogs. sat down and through the second throttle - with the output of the actuator valve.

The invention is illustrated in the drawing.

The proposed device includes an actuating valve 1, a flame sensor with a pilot light 2, a dilution sensor 3, a water overheating sensor 4, an amplifier 5, a water pressure sensor 6, a ventilation pump sensor 7, a water circulation sensor 8, a gas pressure sensor 9 and presence electricity. Valves 11 and 12 with pressure gauges 13 and 14 are mounted before and after the actuator valve. Pressure gauges 15 are mounted after the burner valves 16. Except the ignition igniter 17, it is in fire communication with all the insulated boiler burners 18. The trigger button 19 is seated on the diaphragm 20. The valve 21, under the action of the spring 22, through the diaphragm 23 and the stem 24 is rigidly connected to the trigger button 19 and covers the nozzle 25. A channel 26 connects the cavities 27 to the inlet of the actuating valve. The cavity 28 through the restriction device 29 and the channel 30 is connected to the output of the actuating valve. Cavity 31 is connected to channel 30 via choke 32. Channel

Claims (3)

20 33 connects the output of the actuating valve through the choke 34 to the pilot nozzle and through the choke 35 to the supermembrane cavity 36 of the inverter. Nozzle 37 of sensor -V ...-. V--,: ..-- iT-; The -r is covered with a bimetallic flame by a shutter 38 located in the back of the igniter. A two-way valve 39 covers the nozzle 40, a libresople 41. The membrane 42 contains a rigid center that interacts with the stem of the two-way valve 39. The cavities 43 and 44 are separated by a membrane 45 with a rigid center covering the saddle 46. The gas forked from the outlet valve through valve 47 and the throttle 48 is supplied to the Hyto burner 17. The spring 49 acts on a two-way valve 39. A channel 50 connects the inlet of the actuator valve, a nozzle 41, with a membrane membrane 43. A choke 51 connects the pilot nozzle with a vacuum gauge. Nozzles 52-59 are fastened with respective flaps 60-67. The proposed device works as follows. In the initial state, the valve 12 should be closed and the valve 11 should be open. Short-term impact on the trigger button 19, mounted on the membrane 20, the valve 21 with the spring 22, the membrane 23 and the stem 24 from the nozzle 25 is retracted. The gas from the valve G entrance through the channel 26, the cavity 27 and the nozzle 25 enters the submembrane cavity 28, where due to the presence of the device 29 at the outlet of the channel 30, the gas pressure rises sharply, due to which a force exceeding the spring force 22 develops on the effective area of the membrane 23, and the membrane 23 is fixed in the upper position. The nozzle 25 remains open during the time of pressure growth in the cavity 31 to the maximum value due to the flow of .ii.u ,, -. T.-..- i -, -, .----, - --L1-H into this chamber through the throttle 32, after which the nozzle 25 is covered by the flap 21 and the gas supply to the release of the start button is automatically stopped. If the valve 12 is closed when acting on the trigger button 19, then at the outlet of the valve 1 the gas pressure rises to the input pressure, and the gas through the channel 33 through the throttle 34 enters the igniter 2, which is ignited by the supplied flame, and through the throttle 35 fills the cavity 36 inverter. - - -i-- ;;, .... - .--. - - .. - - - If the valve 12 is open at the time of start-up, the gas pressure at the outlet of valve 1 will be close to zero due to the large multiplicity of the total area of the nozzles of the burners and the area of the flow area of the device 29, and ignite the igniter 2 and start the boiler to work will be rendered impossible. This is the reason for the control of the position of the crane 12, carried out by automation, which is very important for safety during start-up. If there is traction in the furnace, proper pressure and circulation of water in the boiler, electricity and the health of the other monitored parameters of the nozzle, the corresponding sensors will be covered with their shutters and BFias Mi -, and with the appearance of the flame on the pilot 2 and the nozzle 37 with a bimetallic shutter 38 In the cavity 36, the pressure will sharply increase, which will cause the valve 39 to be transferred from the nozzle 40 to the nozzle 41 by the action of the membrane 42 with a rigid center. Atmospheric pressure is established in cavity 43, and under the action of gas pressure in cavity 44, a membrane 45 with a valve will move away from the seat 46 and lock in the extreme upper position, the automation unit will operate and through the seat 46 the gas will flow to the outlet. By successively opening the taps 12 47, gas is supplied to the pilot burner 17 through the throttle. 48, which is ignited from the igniter 2. If there is a flame on the ignition burner 17 by successive opening of the taps 16, the burner 18 can be cut open. The ignition burner 17 is used to automate the multi-burner boilers that have no direct fire connection between the burners. If one of the monitored parameters is violated, the corresponding sensor will open, which will lead to a drop in pressure in the inverter cavity 36, the damper 39 under the action of the spring 49 will cover the draining nozzle 40 and the gas through the channel 50 through the nozzle 41 will fill the cavity 43, the membrane 45 with the valve will descend when it descends gas output through the saddle 46. Thus, the proposed device will work to turn off the gas in an emergency. In the case of boiler operation at a pressure above 200 mm of water. Art. (medium and high gas pressure) the vacuum sensor can only work in conjunction with an intermediate amplifier 5 fed by a low-pressure throttle 51 in front of the pilot nozzle 2. Such a need is caused by very small forces developed by topical rarefaction in the effective area of the sensor membrane. 3. The number of monitored parameters of the proposed device is not limited. To implement the control of an additional parameter, it is sufficient to introduce a nozzle-type sensor valve with a sensor to control the corresponding parameter. The proposed device operates directly from the energy of the combusted gas. This is due to its constructive simplicity and compactness, as well as reliability in operation. A pneumatic device for the protection of household gas appliances, comprising sensors of controlled parameters connected to a diaphragm-type actuating valve equipped with a trigger button connected through a rod to a spring-loaded nozzle gate of the control chamber, in order to increase safety, It is controlled, and the chamber is double-membrane and is connected to the inlet of the actuating valve, with the start button mounted on one membrane of the chamber, and the damper on the other, the floor The springs are controlled, the chambers are connected to one another by means of throttles and, via the second choke, to the output of the actuator valve. Sources of information taken into account in the examination 1. USSR author's certificate JVo 523386, cl. G 05 B W, 1976.