根据国内混合气体保护焊的研究与应用日趋发展的需要,设计了GH—1型混合气体配比器,其结构原理如图。该配比器的核心部分是气体配比混合系统及压力反馈系统。试验表明,配比器混合比精度可达±1％以上,混合气体输送至焊接岗位各焊炬之气体,流量稳 According to the need of the development and application of mixed gas shielded welding in our country, a GH-1 gas mixture proportioner is designed. Its structure and principle are shown in the figure. The proportion of the core part of the gas mixture ratio system and pressure feedback system. Tests showed that the ratio of mixing device accuracy up to ± 1% or more, the mixed gas delivered to the welding position of the welding torch gas flow steady