| 摘要 |
PROBLEM TO BE SOLVED: To enable an article transportation facility, such as the pneumatic powder feeding facility, etc., of a converter to surely prevent the occurrence of a secondary accident or disaster caused by the leakage of a transported article or fluid by surely detecting in an early stage such a deficit as the perforation of a transport pipeline, such as a pneumatic pipeline, liquid feed pipeline, etc., caused by wear, corrosion, etc., by means of a relatively simple inexpensive device. SOLUTION: Double-pipe abnormality detectors 20 for transportation pipeline are installed to the transporting direction changing sections 5a, 5b, and 5c which are the specific wearing sections of the pneumatic pipeline 5 of the pneumatic powder feeding facility. The pressure P2 between the inner pipe 21 and outer pipe 22 of each detector 20 is preset to meet P3 >P2 >P1 (wherein, P3 is the internal pressure of the pipeline 5 during pneumatic feeding and P1 is the internal pressure of the pipeline 5 while the pneumatic feeding is stopped) and always monitored. When the measured P2 value rises (P2 becomes equal to P3 during pneumatic feeding or drops (P2 becomes equal to P1 while pneumatic feeding is stopped), it is discriminated that the pneumatic feeding pipeline is perforated by corrosion.
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