| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe inspection device which can inspect the inside of a tubule of a heat exchanger etc., and has a simple structure.SOLUTION: The pipe inspection device includes a cable, a plurality of pig parts which are mounted on the cable and can expand or contract, and a driving mechanism which makes the pig parts expand or contract. One of the pig parts arranged in a pipe to be inspected is expanded so as to be in close contact with the inner wall of the pipe to be inspected, other pig parts are contracted, and a driving fluid of predetermined pressure is supplied into the pipe to move the expanded pig part in the pipe. |
