| 摘要 |
In a pipeline fluid flow blocking device, a hollow housing unit has a cylindrical shape whose one side is opened and is coupled to a pipeline to communicate with the pipeline. A transfer unit moves in a longitudinal direction of the housing unit inside the housing unit. A first driving unit moves the transfer unit in a gear method. A blocking unit is hinge-coupled to one side of the transfer unit, is disposed to move between the housing unit and the inside of the pipeline through the opened one side of the housing unit by the transfer unit, and is radially expanded or shrunk to shut off the inside of the pipeline. A second driving unit makes the blocking unit be expanded or shrunk. Therefore, as the blocking unit is expanded in a gear method, resistance force against a fluid of very high pressure inside the pipeline is greatly improved, thereby more stably shutting the inside the pipeline.
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