无粉尘污染表面气体喷砂处理设备的研制

Development of a Blast Cleaning Apparatus for Dust-free Surface Treatment

介绍了一种无粉尘污染表面气体喷砂设备的设计结构、工作原理及解决的技术难点。该设备的特点是：采用了特殊的螺旋进给方式，喷射进入混合室的气流从螺旋进给器的螺纹管中穿过，该螺纹管既是输砂元件又是输气元件。采用这种结构的优点是：（１）可方便精确地将气砂混合比调整到最佳值，使能量利用率达到最佳；（２）可采用潮湿砂（含水量５％～１５％）作为喷砂介质，因而无粉尘污染，还可采用极微小的磨料作为喷砂介质，因而特别适合处理表面精度要求较高的管材、板材，如航空用钛合金导管、核电站用锆材等。

A blast cleaning apparatus for dust-free surface treatment has been developed It′s fundamental principle, design, key technical issues and constructional features are presented in detail The special hollow feed-screw that is used in this apparatus Not only conveys the sand, but also serves as a jet nozzle for the compressed air The advantages of the hollow feed-screw are as follows: 1) The ratio of sand to air can be easily regulated to the optimum value; 2) Wet sands (5%～15%water) can be used, ie the blast cleaning is dustless The apparatus is suitable for treating tubes and plates that need to have bright and clean surface, for instance, the titanium alloy tubing used in aviation and the zirconium alloy tubing used in nuclear power stations