JPS57106836A - Monitoring method for liquid discharge pipe - Google Patents

Monitoring method for liquid discharge pipe

Info

Publication number
JPS57106836A
JPS57106836A JP18343380A JP18343380A JPS57106836A JP S57106836 A JPS57106836 A JP S57106836A JP 18343380 A JP18343380 A JP 18343380A JP 18343380 A JP18343380 A JP 18343380A JP S57106836 A JPS57106836 A JP S57106836A
Authority
JP
Japan
Prior art keywords
pipes
contraction
elongation
potential difference
discharge pipe
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
JP18343380A
Other languages
Japanese (ja)
Inventor
Koji Iizuka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18343380A priority Critical patent/JPS57106836A/en
Publication of JPS57106836A publication Critical patent/JPS57106836A/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
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means

Landscapes

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

Abstract

PURPOSE:To make the detection of the inflow of an org. solvent into a liquid discharge pipe made of plastics possible by providing water discharge pipe parts having such a recess where waste liquid accumulates temporarily and detecting the elongation or contraction and temp. rise of the piping materials in this part. CONSTITUTION:The elongation or contraction and temp. rise of waster discharge pipes 5, 6 are detected with, for example, a strain gage R0 affixed to the waster discharge pipes. A constant voltage power source E0 is applied and a variable resistor RX is regulated to make the potential difference between A and B zero. When a fluctuation is produced in the R0, a potential difference is produced between the A and B, and this is amplified with an amplifier 1. If there is the fluctuation more than the existing potential difference, it is put out to a driving amplifier 2; at the same time, an alarm buzzer 3 operates and an alarm lamp 4 lights. The strain gage R0 is affixed by means of adhesives to the part coupled to the pipes 5, 6 at 7, particularly, the part 8 which is reduced of wall thickness to permit easy elongation and contraction deformations. A pipe larger in diameter than the pipes 5, 6 is used for the 7 to allow the liquid having influence to accumulate easily, so as to accumulate the waste liquid temporarily in the part having a difference in wall thickness between both.
JP18343380A 1980-12-24 1980-12-24 Monitoring method for liquid discharge pipe Pending JPS57106836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18343380A JPS57106836A (en) 1980-12-24 1980-12-24 Monitoring method for liquid discharge pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18343380A JPS57106836A (en) 1980-12-24 1980-12-24 Monitoring method for liquid discharge pipe

Publications (1)

Publication Number Publication Date
JPS57106836A true JPS57106836A (en) 1982-07-02

Family

ID=16135684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18343380A Pending JPS57106836A (en) 1980-12-24 1980-12-24 Monitoring method for liquid discharge pipe

Country Status (1)

Country Link
JP (1) JPS57106836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041924A (en) * 2007-08-06 2009-02-26 Yokogawa Electric Corp Flowmeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041924A (en) * 2007-08-06 2009-02-26 Yokogawa Electric Corp Flowmeter

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