目前预应力混凝土圆孔板,在长线台座生产时,起吊脱模工具基本上都是圆管式双吊钩(见图1)。这种工具的缺点是,经一定时期使用后,由于吊钩磨损变形,使板端受力结构性质发生变化,经常将板端圆孔上部混凝士工作面吊豁。圆管式双吊 At present, the pre-stressed concrete round hole plate, in the production of long-term pedestal, is basically a double hook of round pipe type (see Figure 1). The disadvantage of this tool is that, after use for a certain period of time, due to the wear and deformation of the hook, the nature of the structural force at the end of the plate changes, and often the upper face of the hole in the upper end of the plate is suspended. Round pipe double crane