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Title:
MACHINE AND METHOD FOR INSPECTION OF PRESSURE VESSEL
Document Type and Number:
Japanese Patent JP3956540
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To precisely decide the function or the defect of the flexible membrane of a pressure vessel by a low-cost inspection machine by installing a computer to which pressure data from a pressure sensor is inputted so as to be processed.
SOLUTION: A pressure vessel 50 is attached to an inspection machine 1, an opening and shutting valve 5 is opened, and a working fluid is supplied from a pressure source 3 to the working fluid chamber of the pressure vessel 50. As a pressure which is supplied is increased, a gas chamber is compressed, and a point in which the pressure of the gas chamber and that of the working fluid chamber are balanced becomes the inflection point of a pressure diagram. In addition, when the working fluid is supplied to the working fluid chamber, it is compressed up to the maximum capacity of the function of the pressure vessel 50. At this point, an open valve 7 is opened, and the working fluid is discharged until the pressure of the working fluid in the working fluid chamber becomes zero. This operation is repeated a plurality of numbers of times, and whether the function and the quality of a flexible membrane are good or not is decided on the basis of the similarity of every inflection point of the pressure diagram. The pressure diagram is created in such a way that pressure data from a pressure sensor 8 is inputted to a computer 10 so as to be operated and processed.


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Inventors:
Shibayanagi, Shinichi
Application Number:
JP1999000182578
Publication Date:
May 18, 2007
Filing Date:
June 28, 1999
Export Citation:
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Assignee:
NOK CORP
International Classes:
G01L11/00; F15B1/02; F15B19/00; G01M99/00; (IPC1-7): G01M19/00; F15B1/02; F15B19/00; G01L11/00
Domestic Patent References:
JP7139501A
JP6058301A
JP64058801A
JP4152241A
Attorney, Agent or Firm:
佐藤 隆久