JPS5687835A - Detecting method for boiler tube leakage - Google Patents

Detecting method for boiler tube leakage

Info

Publication number
JPS5687835A
JPS5687835A JP16472279A JP16472279A JPS5687835A JP S5687835 A JPS5687835 A JP S5687835A JP 16472279 A JP16472279 A JP 16472279A JP 16472279 A JP16472279 A JP 16472279A JP S5687835 A JPS5687835 A JP S5687835A
Authority
JP
Japan
Prior art keywords
thin tubes
heating thin
tube leakage
inputted
boiler
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.)
Pending
Application number
JP16472279A
Other languages
Japanese (ja)
Inventor
Kazue Nagata
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16472279A priority Critical patent/JPS5687835A/en
Publication of JPS5687835A publication Critical patent/JPS5687835A/en
Pending 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
    • G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations

Landscapes

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

Abstract

PURPOSE:To improve the boiler tube leakage detection in sensitivity by connecting sound sensors directly to the heating thin tubes or the furnace water-cooled wall of a boiler. CONSTITUTION:A plurality of sound sensors 3 are secured directly to heating thin tubes 1a, 1b... or a furnace water-cooled wall 7 which is made of the same material as said heating thin tubes 1a, 1b... and which is unitary with them. Thereby, when tube leakage occurs, the leaking noise generated when steam is blown off through the part of the heating thin tubes 1a, 1b... is transmitted through the metal structure to reach the sound sensor 3 installed nearby, amplified in an amplifier 8 and inputted to a filter circuit 9, where the signal within the acoustic frequency band which is peculiar to the leaking noise is selected, converted into a DC level in a square-law detector 10 and inputted to an alarm setting means 11 which decides it as leakage when the inputted signal level exceeds a preset level and actuates an alarm 12. Accordingly, the noise discrimination ratio and consequently the tube leakage detecting sensitivity are improved.
JP16472279A 1979-12-20 1979-12-20 Detecting method for boiler tube leakage Pending JPS5687835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16472279A JPS5687835A (en) 1979-12-20 1979-12-20 Detecting method for boiler tube leakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16472279A JPS5687835A (en) 1979-12-20 1979-12-20 Detecting method for boiler tube leakage

Publications (1)

Publication Number Publication Date
JPS5687835A true JPS5687835A (en) 1981-07-16

Family

ID=15798643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16472279A Pending JPS5687835A (en) 1979-12-20 1979-12-20 Detecting method for boiler tube leakage

Country Status (1)

Country Link
JP (1) JPS5687835A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640121A (en) * 1983-10-05 1987-02-03 Kraftwerk Union Aktiengesellschaft Method for finding a leak in pressure-carrying vessels and apparatus for carrying out the method
JPH0240521A (en) * 1988-08-01 1990-02-09 Kansai Electric Power Co Inc:The Method for detecting leaking sound of boiler tube
JPH04331339A (en) * 1991-03-27 1992-11-19 Kansai Electric Power Co Inc:The Leak age sound detection device of heat exchanger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640121A (en) * 1983-10-05 1987-02-03 Kraftwerk Union Aktiengesellschaft Method for finding a leak in pressure-carrying vessels and apparatus for carrying out the method
JPH0240521A (en) * 1988-08-01 1990-02-09 Kansai Electric Power Co Inc:The Method for detecting leaking sound of boiler tube
JPH04331339A (en) * 1991-03-27 1992-11-19 Kansai Electric Power Co Inc:The Leak age sound detection device of heat exchanger

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