METHOD AND DEVICE OF TESTING HYDRAULIC PRESSURE FOR PIPE WITH SMALL OR MEDIUM-SIZED BORE

• Main Authors: SAKAZAKI TAKASHI, NISHIDA YOSHIYA, OGAWA KAZUHISA, ODA TOMOAKI, NAKAMURA TOSHIMITSU, UNO YUICHI, NAGAO YUKIYOSHI, UEDA TAKASHI
• Format: Patent
• Language: English
• Published: 08.01.2003
• Edition: 7
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

PROBLEM TO BE SOLVED: To provide a test method capable of easily and effectively testing a water tight performance of a joint section of a ductile cast iron pipe or the like buried in the ground, and provide a device of testing hydraulic pressure used for the test method. SOLUTION: The test method is provided with an elastic cylinder capable of expanding and shrinking, a nipple fixed to both ends of the elastic cylinder, a phase flange closing a hollow section of the nipple, and a wheel integrally moving these members, and uses the device of testing hydraulic pressure for pipe with a small or medium-sized bore, which has a pipe passing through the flange and pouring fluid into the elastic cylinder. The test device is inserted into a pipe to be tested and bonded to the inner surface of the pipe by pouring the fluid into the elastic cylinder and expanding it, and thereby both ends of a section to be tested of the channel of pipe is set in a water tight closed state, and the inside of the pipe at the closed section to be tested is filled with water and pressurized, and then the fluctuation of the pressure is inspected.