Title:
【発明の名称】パイプの漏れ検出装置
Document Type and Number:
Japanese Patent JP3481591
Kind Code:
B2
Abstract:
A pipe leak testing arrangement which includes a device having sealing bags joined by a coupling. When inflated, the bags form a seal volume chamber. The bags may not form a perfect seal, and as a result leakage past the bags may occur when a differential pressure is present. A remaining portion of the pipe forms a test volume chamber. A first transducer measures differential pressure between the chambers and a further transducer measures the test chamber pressure. Measured pressure information is used by a control device to track pressure change and to adjust the seal pressure so as to maintain equal pressures even if the test pressure decays due to a pipe fracture. In an alternative arrangement, two separate devices with associated circuitry are provided to facilitate two temporary seal pressure chambers with the test chamber therebetween.
Inventors:
Ashworth Roger Philip
Application Number:
JP2000511045A
Publication Date:
December 22, 2003
Filing Date:
August 20, 1998
Export Citation:
Assignee:
Lattice Intellectual Property Limited
International Classes:
F16L55/44; G01M3/28; (IPC1-7): G01M3/28
Domestic Patent References:
| JP7190878A | ||||
| JP61246647A | ||||
| JP5713333A |
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)