| 摘要 |
PURPOSE:To detect easily the position where abnormality arises in a pipeline by using a driving pig which is moved by the fluid in the pipe and has high resilience and sealability and an inspecting pig which is driven and moved by the driving pig. CONSTITUTION:The driving pig 1 which consists of a synthetic resin such as polyurethane and has high resilience and sealability is used. The flow rate of the fluid flowing from a fluid driving source 5 is measured by a flowmeter 7 and the position of the pig 1 is detected from the flow rate at each time. The inspecting pig 2 is connected via a universally bendable joint 9 to the pig 1. The inspection result at each time or the abnormality time is stored in an apparatus for measuring the pig 2. The inspection result in each position of the pipeline or the position where the abnormality arises in the pipeline is thereupon easily detected by comparing both of the pigs 1, 2. |
