我厂机械车间铸造工段有一台30吨振动落砂机,大型铸钢件都用它除砂。虽然减轻了工人的劳动强度,提高了工效,但工作时噪音大,粉尘浓度高,严重地危害着职工的身体健康。为了改善劳动条件,设计了一座一端固定的移动式密闭罩(图1)和一台自激式水力除尘器组成的净化含尘气体系统(图2)。 I plant machinery workshop foundry section has a 30 tons of vibration falling sand machine, large castings are used it in addition to sand. Although alleviating the workers’ labor intensity and improving work efficiency, the noise at work and the dust concentration are high, seriously endangering the health of workers. In order to improve the working conditions, a dust-tight gas system consisting of a mobile sealed enclosure with one end fixed (Figure 1) and a self-excited hydraulic dust collector was designed (Figure 2).