SU877486A1 - Two-position gas consumption regulator - Google Patents

Description

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The invention relates to the regulation of glutous fluxes and can be used for the automatic regulation of the thermal regime of technological devices, in particular, food-cooking boilers, water heaters, and ovens.

A device is known for protection against gas poisoning and products of its combustion during operation of gas water heaters and from domestic gas ovens, including clalan-cutter with a membrane relay, gas relays and impulse lines 11.

The disadvantage of it is that it can also be used as an automatic regulator of gas flow, because it does not provide a self-switching mode.

Closest to the proposed technical entity is a device for regulating the operation of a gas water heater, which is connected by gas lines to the igniter and the main burner, a membrane-type cut-off valve with a pneumatic memory unit located in it, connected to the igniter and the main burner.

pressure sensors and water temperatures, a detector installed on the impulse line between the slam-shut valve and the draft sensor, and flame sensor {2.

The disadvantages of this device in the NPS; the complexity of the design and the unreliability of work in the self-switching mode, as well as the impossibility of controlling the low gas flow rate, due to the presence of intermediate automatic relays and possible leaks in them due to

10 the absence of elements of regulating small expenses.

The purpose of the invention is to increase the reliability and simplify the controller.

Postavleina goal is achieved by the fact that

li Two-position gas flow control valve containing a diaphragm valve, the supermembrane cavity of which is connected to the output chamber of the membrane relay, in which a podmembrane damper associated with the membrane relay is located between the two nozzles, and the normally closed is connected via a membrane submembrane chamber relay with the atmosphere, and normally open with the inlet of the diaphragm valve, connected by a channel .. with a submembrane cavity of the diaphragm valve, and series-connected constant ossel and control valve, between which the cavity is connected to the membrane chamber nadmembrannoy relay introduced adjustable throttle mounted in the channel imparting a submembrane inlet cavity of the diaphragm valve, and an input DC choke connected to the inlet of the diaphragm valve.

The drawing shows a diagram of the on-off gas flow regulator.

The regulator contains a diaphragm valve, including a housing 1, a membrane 2 with a valve 3, having an inlet 4 and an outlet 5 nozzles, a membrane membrane 6 of the membrane valve connected to the output chamber 7 of the membrane relay including the housing 8, the spring 9, the flap 10 with a spring 11 fixed by means of a rod 12 on the rigid center 13 of the membrane 14 and located between two nozzles 15 and 16, the nozzle 15 (normally closed) connected through the submembrane chamber 17 of the membrane relay to the atmosphere, and the nozzle 16 (normally open) connected to the input 4 membrane pipe This valve is connected in series with the inlet pipe 4, a constant choke 18 and a control valve, including a nozzle 19 and a valve 20, the cavity between which is connected to the membrane membrane 21, and an adjustable choke 22 installed in the channel 23, giving the input valve to 4 with a diaphragm cavity 24 membrane valve.

The regulator works as follows. The gas supplied to the inlet 4 of the housing 1 of the diaphragm valve with a constant section throttle 18 fills the chamber 21 of the membrane relay and is supplied to the control valve with the nozzle 19 and the damper 20. With the control valve closed (the damper 20 closes the nozzle i9) the pressure in chamber 21 rises, membrane 14 lowers and moves flap 10 down. The valve 10 closes the nozzle 16 and opens the nozzle 15, together with the supramembrane cavity 6 of the membrane valve with the atmosphere. At the same time, the adjustable choke 22, the gas through the channel 23 enters the submembrane cavity 24 of the membrane valve and then to the outlet nozzle 5. Due to the pressure difference in the cavities 24 and 6, the valve 3 mounted on the membrane 2 rises and opens the passage of gas from the inlet nozzle 4 to the exhaust pipe 5. When the upper value of a given adjustable parameter is reached (pressure, temperature, etc.) controlled by the control valve, the latter opens - the valve 20 moves away from the nozzle 19. As a result, the pressure in the chamber 21 membrane relay drops and under the action

the spring 11, the valve 10 moves to the upper position by opening the nozzle 16 and closing the nozzle 15. The gas through the nozzle 16 fills the supermembrane cavity 6 of the membrane valve. The pressure in the cavity 24 and 6 is equalized and

valve 3 with membrane 2 is lowered by its own weight. The diaphragm valve closes, thereby reducing gas flow through the regulator. The magnitude of the low gas flow rate is determined by the position of the adjustable throttle 22 in the channel 23.

When the control object is cooled and the lower value of the specified adjustable parameter is reached, the control valve closes (valve 20 closes the nozzle 19), pressure increases in the cavity, valve III goes into the lower position. The gas from cavity 6 through the nozzle 15 is evacuated into the atmosphere and the membrane valve opens. At the same time, the gas flow rate through the controller increases. I

Thus, the regulator is operated in a self-switching mode.

The use of the proposed regulator in comparison with the known one allows the automatic control of the thermal regime of gas equipment while achieving fuel economy and reducing heat loss to the environment.

Claims (2)

1. Authors certificate USSR N 162472, cl. F 23 N 5/22, 1963. 2. Authors certificate of the USSR N 174568, cl. F 23 N 5/22, 1965 (prototype).