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为了解决SH隧道式烘梗丝机因“上排水”而造成的水分控制精度不高的问题,改进了其疏水装置,将生产过程中产生的冷凝水先收集在与大气相通的零压罐中,然后再利用以压缩空气为动力的疏水泵将冷凝水排放到冷凝水回收管网中,保证了冷凝水的排放效果。改进后,烘梗丝机出口梗丝含水率的标准偏差由改进前的0.38%降到0.26%,过程能力控制指数CPK由0.93提高到1.28。改进后的疏水装置扩大了SH隧道式烘梗丝机的使用条件,提高了出口梗丝水分控制精度,保证了产品质量。
In order to solve the problem that the water quality of SH tunnel boring machine is not high due to the “drainage”, the drainage device is improved to collect the condensate produced in the production process in the zero pressure tank , And then use a compressed air-powered drain pump to drain the condensate to the condensate recovery pipe network to ensure condensate discharge. After the improvement, the standard deviation of the moisture content of the export stems from the dryer was reduced from 0.38% before the improvement to 0.26%, and the process control index CPK increased from 0.93 to 1.28. The improved hydrophobic device expands the service conditions of the SH tunnel boring machine and improves the moisture control accuracy of the outlet stem and ensures the product quality.