| 摘要 |
PURPOSE: A blocking system having a pivot flap for the section of a large pipe is provided to improve stability, since a drive shaft and toggle levers have angled sections. CONSTITUTION: A blocking system having a pivot flap for the section of a large pipe comprises a flap housing(1), a pivot flap(2), and a drive unit. The flap housing has pipe connection units. The pivot flap pivots frontward and backward between both ends inside a flap housing. The drive unit has a drive shaft(3). The drive shaft is connected to the pivot flap by a toggle lever system(4). |
