利用相序保护装置改造插入式振动器张德成（安徽省滁州市水利局工程处）插入式振动器一般包括电机、止逆装置、软轴、振动棒四个部分。具有振动效率高、携带方便、操作简单等优点，但是在实际使用过程中也发现一些缺点。例如：①作为主要部件的传动软轴是用钢丝缠绕的挠性... Transforming plug-in vibrators using phase sequence protection devices Zhang Decheng (Engineering Department of Chuzhou City Water Conservancy Bureau, Anhui Province) Plug-in vibrators generally include four parts: a motor, a non-return device, a flexible shaft, and a vibrator. It has the advantages of high vibration efficiency, convenient carrying, simple operation, etc. However, some disadvantages were found during the actual use. For example: 1 as the main part of the drive shaft is a flexible wire wound ...