Universal fuel gas mixing valve suitable for gas supply by different gas sources

Abstract

The invention relates to a universal fuel gas mixing valve which consists of a cover plate, a lower valve body, a middle valve body, an upper valve body, a double-level connection type decompressor, switch membrane assemblies, air throttle assemblies and a multi-fuel switching shaft. Double-level decompression of the double-level connection decompressor is carried out so that the gas pressure of a gas source is constant, and the stability of power and the exhaust are greatly protected. The switch membrane assemblies are provided, thus the gas source is ensured not to generate leakage when thepower does not work or has failure to cause the stop of a machine, and the starting performance is better; the air throttle assemblies and the multi-fuel switching shaft are provided, thus the gas can be supplied to the power through three paths, namely an idling hole, a main gas path, and a fuel gas-supplementing hole, and according to different requirements on the rotation speed of the power, the air throttle assemblies correspondingly and automatically regulate the gas inflows of the main gas path and the fuel gas-supplementing hole; and in addition, the gas supply amount is controlled through the rotation of the multi-fuel switching shaft according to fuel performance requirements.

Description

technical field [0001] The invention relates to a component part of an engine, in particular to a general gas mixing valve suitable for supplying gas from different gas sources adopted by a small general power, and belongs to the technical field of small general engines. Background technique [0002] The air supply device of the small general-purpose engine of the prior art generally adopts a single-stage lever type decompression, and the device is only provided with one main metering hole for direct air supply. Therefore, when using different gas sources (such as natural gas, biogas, etc.), the corresponding gas source gas supply device must be configured separately, causing a lot of inconvenience in its use. [0003] At the same time, the traditional air source supply device will produce air source leakage when the engine does not work or fails to shut down the air source in time; moreover, when the air source pressure is unstable, the power performance and emissions of th...

AI Technical Summary

Problems solved by technology

Therefore, when using different gas sources (such as natural gas, biogas, etc.), the corresponding gas source gas supply device must be configured separately, causing a lot of inconvenience in its use

[0003] At the same time, the traditional air source supply device will produce air source leakage when the engine does not work or fails to shut down the air source in time; moreover, when the air source pressure is unstable, the power performance and emissions of the engine cannot be effectively controlled

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