JPS57153236A - Detection for leakage of vacuum - Google Patents

Detection for leakage of vacuum

Info

Publication number
JPS57153236A
JPS57153236A JP3800281A JP3800281A JPS57153236A JP S57153236 A JPS57153236 A JP S57153236A JP 3800281 A JP3800281 A JP 3800281A JP 3800281 A JP3800281 A JP 3800281A JP S57153236 A JPS57153236 A JP S57153236A
Authority
JP
Japan
Prior art keywords
vacuum
space
leakage
pump
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3800281A
Other languages
Japanese (ja)
Other versions
JPS6355647B2 (en
Inventor
Hideo Harano
Yoji Ishida
Mamoru Kanechika
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3800281A priority Critical patent/JPS57153236A/en
Publication of JPS57153236A publication Critical patent/JPS57153236A/en
Publication of JPS6355647B2 publication Critical patent/JPS6355647B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To detect the leakage of vacuum, by making a vessel vacuous partially to get a prescribed degree of vacuum in a very short time. CONSTITUTION:When a roughing-down pump 11 is operated, the part of a space C between inside and outside cylinders 3 and 4 has a negative pressure, and parts of contact faces (h) and h' are adhered closely. When the operation of a pump of a leakage detector 12 with a vacuum pump is started after the space C is made vacuous in a certain degree, the part of a space B has a negative pressure. If the leakage of vacuum exists in a space A because of some defect of a nozzle 2, the space A is not made vacuous in a prescribed degree; and a time required for obtaining a prescribed degree of vacuum in the volume of the space A is detected preliminarily to discriminate the leakage of vacuum in some part of the nozzle 2. If the defect is small and the quantity of leakage of vacuum is small, the outside of the nozzle 2 is covered with a vinyl sheet 10 to form a space D, and a proper quantity of detecting gas is charged into the space D, and thus, it is confirmed by the leakage detector 12 with a vacuum pump whether the leakage of vacuum exists or not.
JP3800281A 1981-03-18 1981-03-18 Detection for leakage of vacuum Granted JPS57153236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3800281A JPS57153236A (en) 1981-03-18 1981-03-18 Detection for leakage of vacuum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3800281A JPS57153236A (en) 1981-03-18 1981-03-18 Detection for leakage of vacuum

Publications (2)

Publication Number Publication Date
JPS57153236A true JPS57153236A (en) 1982-09-21
JPS6355647B2 JPS6355647B2 (en) 1988-11-04

Family

ID=12513362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3800281A Granted JPS57153236A (en) 1981-03-18 1981-03-18 Detection for leakage of vacuum

Country Status (1)

Country Link
JP (1) JPS57153236A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0351736A (en) * 1989-07-19 1991-03-06 Honda Motor Co Ltd Inspection of airtightness of vehicle
US6886389B1 (en) * 2003-12-10 2005-05-03 The Boeing Company Systems and methods for detecting and locating leaks in internal pressure vessels

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417077A (en) * 1977-07-07 1979-02-08 Takuma Kk Detecting of vacuum leakage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417077A (en) * 1977-07-07 1979-02-08 Takuma Kk Detecting of vacuum leakage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0351736A (en) * 1989-07-19 1991-03-06 Honda Motor Co Ltd Inspection of airtightness of vehicle
US6886389B1 (en) * 2003-12-10 2005-05-03 The Boeing Company Systems and methods for detecting and locating leaks in internal pressure vessels

Also Published As

Publication number Publication date
JPS6355647B2 (en) 1988-11-04

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