A gas regulating valve

Abstract

A gas regulating valve, comprising a valve body, a valve stem, a valve core and a driving device, the valve body is provided with a valve cavity, an air intake channel, an inner ring outlet channel and an outer ring outlet channel; the valve stem is linked with the valve core, and the valve core can It is movable in the valve cavity of the valve body and can adjust the flow of the inner ring outlet channel and the outer ring outlet channel; the driving device is provided with an output shaft, which is connected with the valve stem to drive the valve core to move axially in the valve cavity , further comprising a first compression spring and a second compression spring, the elastic coefficient of the second compression spring is greater than that of the first compression spring. By setting the first compression spring, the valve stem and the valve core are softly connected. Compared with the prior art, the excess stroke of the output shaft of the drive mechanism is used to squeeze the valve core to form a seal. In the present invention, the first compression spring and the action of the second compression spring to form a seal, the damage to the valve core by the first compression spring is small, so that the seal is not easily affected by the damage of the valve core, and the safety is high.

Description

technical field [0001] The invention relates to the technical field of gas flow control, in particular to a gas regulating valve. Background technique [0002] Intelligent control of gas stoves is a major trend in the research of modern kitchen appliances. On the one hand, how to achieve precise and stable firepower control of gas stoves is an important direction of gas stove research. On the other hand, with the improvement of people's requirements for kitchen space utilization, the built-in, flat and ultra-thin concept cooker also puts forward higher requirements for the gas valve body system. [0003] Existing gas cookers are provided with electric control valves, mainly stepping motor-driven cock valves, such as the Chinese utility model patent "A Kind of Gas Intelligent Control of Gas Cookers" whose patent number is ZL201220184529. valve". In addition, there are proportional valves with membranes, such as the Chinese utility model patent "Gas Stove" with patent numbe...

AI Technical Summary

Problems solved by technology

[0005] First, due to the hard connection between the first valve stem and the first valve core, the first valve rod drives the first valve core to move excessively to the left to achieve sealing; this will greatly damage the first valve core, A long time will affect the security

[0006] Second, if the output shaft of the driving device loses steps during the leftward movement (the first spool should move to the left, but actually the first spool does not move to the left), it will also cause the first spool to move to the left. The seal is not tight, and it is easy to leak air

[0007] Third, through the cooperation of the first valve stem and the first valve core, the adjustment accuracy is relatively low, which cannot well meet the accuracy requirements for the low fire adjustment of the gas stove

[0008] Fourth, the problem of large flow hysteresis of stepper motor valves (valve driven by stepper motors) is not solved

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