JPS5984153A - Inspecting method of lining - Google Patents
Inspecting method of liningInfo
- Publication number
- JPS5984153A JPS5984153A JP57194036A JP19403682A JPS5984153A JP S5984153 A JPS5984153 A JP S5984153A JP 57194036 A JP57194036 A JP 57194036A JP 19403682 A JP19403682 A JP 19403682A JP S5984153 A JPS5984153 A JP S5984153A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- lining
- peeling
- dominant
- frequency analysis
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はモルタルライニング鋼管などのライニングの
剥離を検査する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for inspecting peeling of a lining such as a mortar-lined steel pipe.
従来モルタルライニング管のライニングの剥離を検査す
る手段としては、小形のつちでライニング面を軽くたた
き、その音を聴き、音の違いにより判断する方法が採ら
れている。しかし従来の方法は検査者の主１１ｆ、に頼
ったもので、ライニングの剥離の状況を定量的に把握す
ることができないため客観的な検査方法の開発が望まれ
ていた。Conventionally, the method used to test for peeling of the lining of a mortar-lined pipe is to tap the lining surface with a small hammer, listen to the sound, and judge based on the difference in sound. However, the conventional method relies on the inspector 11f, and it is not possible to quantitatively grasp the state of peeling of the lining, so there has been a desire to develop an objective inspection method.
この発明の方法は上述のような事情の下に発明されたも
ので、小形のつち等によりライニング面を軽くたたき、
その時発生する音を周波数分析し、卓越周波数を比較す
る仁と知よりライニングの剥離の状況を客観的、定量的
に把握することを特徴とし、２イニングに剥離が生じる
と、小形のっちでたたいた時の音が低くなる、すなわち
音の周波数が低くなるという原理を利用している。The method of this invention was invented under the above-mentioned circumstances, and involves lightly tapping the lining surface with a small mallet, etc.
The feature is that the sound generated at that time is frequency-analyzed and the predominant frequency is compared with Jin and Tomo to objectively and quantitatively understand the situation of lining delamination. It uses the principle that the sound becomes lower when the sound is played, that is, the frequency of the sound becomes lower.
次【この発明による具体的な検査方法を以下匝述べる。Next [The specific inspection method according to the present invention will be described below.
第１図はその検査方法を示した模式図であり、図中１は
鋼管、２はライニングである。FIG. 1 is a schematic diagram showing the inspection method, in which 1 is a steel pipe and 2 is a lining.
■ 小形のりち等で２イニング面をたたき、その時発生
する音を騒音計で録る。フィルタユニットを介し、実時
間分析器により周波数分析を行ない最も卓越している周
波数、すなわち卓越周波数を求める１、
なお周波数分析結果はレベルレコーダで記録しておくこ
とが望ましい。■ Hit the second inning surface with a small pitcher, etc., and record the sound generated at that time with a sound level meter. Frequency analysis is performed using a real-time analyzer via a filter unit to determine the most prominent frequency, that is, the predominant frequency1.It is desirable to record the frequency analysis results with a level recorder.
（リ この周波数分析をライニング面の数個所で行ない
、各検査個所における卓越周波数を求める。(Li) Perform this frequency analysis at several locations on the lining surface to determine the dominant frequency at each inspection location.
■ その結果を比較し、卓越周波数の低い検査個所にラ
イニングの剥離が生じていることがわかる。■ By comparing the results, it can be seen that the lining has peeled off at the test locations where the dominant frequency is low.
なおこの発明では、ライニング面をたたかず、鋼管外面
をたたいても検査することができる。 ４゜次に第２図
および第３図のグラフで示される実施例について説明す
る。In addition, in this invention, the inspection can be performed by striking the outer surface of the steel pipe without striking the lining surface. 4. Next, the embodiment shown in the graphs of FIGS. 2 and 3 will be described.
この実施例では２００１＠管（ＳＧＰ 、外径２１６．
３間、肉厚５．８間、長さ３００間）の内面にモルタル
ライニング（平均ライニング厚８Ｂ）を施し、た供試！
２体（Ａ 、 Ｂ）を用いた。In this example, 2001@tube (SGP, outer diameter 216.
Mortar lining (average lining thickness 8B) was applied to the inner surface of the inner surface of the 3-meter, wall thickness 5.8-meter, length 300-meter).
Two bodies (A, B) were used.
供試管Ａはライニングに剥離がなく、供試管ＢｔよＮ：
Ｉ Ｍが発生しており、これらについ°Ｃ上述した方法
で周波数分析を行なった。Test tube A has no peeling in its lining, and test tube BtN:
IM occurred, and frequency analysis was performed on these using the method described above.
第２図は剥離のない場合のグラフで卓越周波数は２．５
ＫＩｌｚ 、第３図は剥離のある場合のグラフで卓越
周波数は１．２５ ＫＩＩｚである。Figure 2 is a graph with no peeling, and the dominant frequency is 2.5.
KIlz, Figure 3 is a graph for the case where there is peeling, and the dominant frequency is 1.25 KIIz.
以−にのことから、剥離のある場合の卓越周波数ｔｉｔ
剥離のない場合のそれより明らかに低くなっておυ、こ
の発明の妥当性が証明された。From the above, the dominant frequency tit when there is peeling
It was clearly lower than that in the case without peeling, proving the validity of this invention.
この発明は上述したような構成からなり、従来、検査者
の感に頼っていた剥離の検査を客観的、定量的なものに
おき変えることができ、個人差といったものも生じない
。The present invention has the above-described configuration, and the peeling inspection that conventionally relied on the sense of the inspector can be replaced with an objective and quantitative one, and there are no individual differences.
第１図はこの発明の検査方法を示す模式図、第２図およ
び第３図は検査結果を比較したグラフである。
１・・鋼管、２・・ライニング。FIG. 1 is a schematic diagram showing the inspection method of the present invention, and FIGS. 2 and 3 are graphs comparing the inspection results. 1. Steel pipe, 2. Lining.
Claims (1)
周波数分析し、卓越周波数を求め、これを比較すること
（てよりライニングの剥離の状況を定量的に把握するこ
とを特徴とするライニング検査方法。(1) A lining inspection method characterized by striking the lining surface, analyzing the frequency of the sound generated at that time, determining the dominant frequency, and comparing these (by which the situation of lining peeling can be quantitatively grasped).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57194036A JPS5984153A (en) | 1982-11-05 | 1982-11-05 | Inspecting method of lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57194036A JPS5984153A (en) | 1982-11-05 | 1982-11-05 | Inspecting method of lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5984153A true JPS5984153A (en) | 1984-05-15 |
Family
ID=16317864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57194036A Pending JPS5984153A (en) | 1982-11-05 | 1982-11-05 | Inspecting method of lining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5984153A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60256050A (en) * | 1984-06-01 | 1985-12-17 | Mitsubishi Heavy Ind Ltd | Non-destructive inspection apparatus |
| JPS6170433A (en) * | 1984-09-13 | 1986-04-11 | Nitsukouken Service Kk | Method for detecting peeled part of wall body |
| JPS61140859A (en) * | 1984-12-13 | 1986-06-27 | Mitsubishi Heavy Ind Ltd | Nondestructive inspecting method of coating layer |
| JPH0254167A (en) * | 1988-08-18 | 1990-02-23 | Kawasaki Steel Corp | Method for foreknowing deformation of steel-strip coil |
| EP0429446A1 (en) * | 1987-11-20 | 1991-06-05 | Southwest Research Institute | Non-destructive evaluation of ropes by using transverse vibrational wave method |
| US5686652A (en) * | 1996-09-09 | 1997-11-11 | Pfund; Bruce | Portable test hammer apparatus |
| JP2008046113A (en) * | 2006-07-21 | 2008-02-28 | Sekisui Chem Co Ltd | Inspection method of inspecting curing state of fiber reinforced plastic material lining buried pipe |
| JP2009243934A (en) * | 2008-03-28 | 2009-10-22 | Osaka Gas Co Ltd | Determination method of lining in pipe |
-
1982
- 1982-11-05 JP JP57194036A patent/JPS5984153A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60256050A (en) * | 1984-06-01 | 1985-12-17 | Mitsubishi Heavy Ind Ltd | Non-destructive inspection apparatus |
| JPS6170433A (en) * | 1984-09-13 | 1986-04-11 | Nitsukouken Service Kk | Method for detecting peeled part of wall body |
| JPS61140859A (en) * | 1984-12-13 | 1986-06-27 | Mitsubishi Heavy Ind Ltd | Nondestructive inspecting method of coating layer |
| EP0429446A1 (en) * | 1987-11-20 | 1991-06-05 | Southwest Research Institute | Non-destructive evaluation of ropes by using transverse vibrational wave method |
| JPH0254167A (en) * | 1988-08-18 | 1990-02-23 | Kawasaki Steel Corp | Method for foreknowing deformation of steel-strip coil |
| US5686652A (en) * | 1996-09-09 | 1997-11-11 | Pfund; Bruce | Portable test hammer apparatus |
| JP2008046113A (en) * | 2006-07-21 | 2008-02-28 | Sekisui Chem Co Ltd | Inspection method of inspecting curing state of fiber reinforced plastic material lining buried pipe |
| JP2009243934A (en) * | 2008-03-28 | 2009-10-22 | Osaka Gas Co Ltd | Determination method of lining in pipe |
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