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国家卫生标准规定,煤矿岩巷掘进粉尘浓度必须降到2mg/m~3以下。我矿以前岩巷掘进放炮时,人工开关洒水喷雾不及时,达不到降低粉尘浓度的效果。为有效地控制粉尘飞扬,我们试制成功一种炮声自动延时喷雾开关电路。这种电路是由可控硅和晶体管元件组成。炮声响后0.1s,自动开启防爆电磁阀,进行雾状洒水,洒水2min40s 后,自动关闭电磁阀,停止喷雾洒水。本机声控
National health standards, coal mine rock drift driving dust concentration must be reduced to 2mg / m ~ 3 or less. Before mine mine rock tunneling blasting, manual switch sprinkler spray is not timely, can not achieve the effect of reducing the concentration of dust. In order to effectively control the dust flying, we successfully prototype a gun sound delay spray switch circuit automatically. This circuit is composed of thyristors and transistor components. After the gun sound 0.1s, automatically open the explosion-proof solenoid valve, spray fog, sprinkler 2min40s, the solenoid valve is closed automatically, stop spraying water. Native sound control