JPS6371612A - Coating thickness measuring method for synthetic resin coated steel pipe - Google Patents
Coating thickness measuring method for synthetic resin coated steel pipeInfo
- Publication number
- JPS6371612A JPS6371612A JP21685686A JP21685686A JPS6371612A JP S6371612 A JPS6371612 A JP S6371612A JP 21685686 A JP21685686 A JP 21685686A JP 21685686 A JP21685686 A JP 21685686A JP S6371612 A JPS6371612 A JP S6371612A
- Authority
- JP
- Japan
- Prior art keywords
- coating thickness
- sensor
- coating
- thinnest
- steel 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
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 54
- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 18
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims description 7
- 239000011295 pitch Substances 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、合成樹脂被覆鋼管の被覆厚測定方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for measuring the coating thickness of a synthetic resin-coated steel pipe.
「従来の技術」
従来、合成樹脂被覆鋼管の被覆厚測定方法としては、例
えば特公昭６ｏ−ｘ５Ｂｓｔ号公報に開示されている如
く、回転しながら前進する鋼管の外周に、Ｔダイからの
合成樹脂シートをスパイラル状に巻き付けて形成された
被覆層上を、シートの巻き付けの１ピツチを走査する先
行側の被覆厚検出用センサーにより、被覆ピッチ間全域
の被覆厚分布を測定し、その測定値のうち、最薄部の位
置信号により、後行側の被覆厚検出用センサーを当該部
分位置へ追従させて、この後行側の被覆厚検出用センサ
ーにより被覆厚の最薄部を測定するようにしている。``Prior Art'' Conventionally, as a method for measuring the coating thickness of a synthetic resin-coated steel pipe, as disclosed in, for example, Japanese Patent Publication No. 6O-X5Bst, synthetic resin from a T-die is coated on the outer periphery of a rotating and advancing steel pipe. The coating thickness detection sensor on the leading side scans each pitch of the sheet winding over the coating layer formed by spirally winding the sheet, and measures the coating thickness distribution over the entire area between the coating pitches, and calculates the measured value. Based on the position signal of the thinnest part, the trailing side coating thickness detection sensor is made to follow the position of the part, and the trailing side coating thickness detection sensor measures the thinnest part of the coating thickness. ing.
「発明が解決しようとする問題点」
前記従来の測定方法にあっζは、二組の検出用センサー
が必要であり、従って測定装置、制御装置等もそれぞれ
二組が必要となり、設備費が高価となる問題があった。"Problems to be Solved by the Invention" The conventional measurement method described above requires two sets of detection sensors, and therefore requires two sets of measuring devices, control devices, etc., and the equipment cost is high. There was a problem.
本発明は、かくの如き従来の問題点を解決することを目
的とするものである。The present invention aims to solve such conventional problems.
「問題点を解決するための手段」 以下に本発明について説明する。"Means to solve problems" The present invention will be explained below.
一般に、回転しながら前進する鋼管の外周に、Ｔダイか
らの例えばポリエチレン等の合成樹脂シートをスパイラ
ル状に巻き付けて被覆層を形成する装置においては、鋼
管の１回転における前進量は、規則的にコントロールさ
れていて大きく異なることはない。Generally, in a device that forms a coating layer by spirally wrapping a synthetic resin sheet such as polyethylene from a T-die around the outer periphery of a steel pipe that moves forward while rotating, the amount of advance of the steel pipe in one rotation is regular. It's controlled and doesn't make much of a difference.
また１ビシチ間の被覆厚の分布は、はぼ一定であって、
最薄部あるいは最厚部の位置はそれ程変動しない。In addition, the distribution of coating thickness between one beach is almost constant,
The position of the thinnest or thickest portion does not change much.
従って、一度量薄部にセットされた被覆厚検出用センサ
ーは、大きな移動をすることな（測定を実施するので、
前記技術におけるｉ薄部の被覆厚検出用センサーは、測
定開始時はｍ要な役目を持つが、測定を開始した後は、
抜き取り的に最薄部を瞳出し、測定位置を決定しても、
測定値に大きな変動はない。Therefore, once the coating thickness detection sensor is set in the thin area, it does not need to be moved much (because the measurement is carried out).
The sensor for detecting the coating thickness of the thin part in the above technology has an important role at the start of measurement, but after the start of measurement,
Even if you extract the thinnest part of the pupil and determine the measurement position,
There are no large fluctuations in the measured values.
以上のような理由から、本発明は、被覆厚検出用センサ
ーを１個にすることにより、設備費を安価にし、かつ設
置場所のスペースを有効に利用できるようにしたもので
ある。For the reasons described above, the present invention reduces equipment costs and makes effective use of installation space by using only one sensor for detecting coating thickness.
すなわち、本発明は、回転しながら前進する鋼管の外周
に、Ｔダイからの合成樹脂シートをスパイラル状に巻き
付けて形成された被覆層上において、前記シートの巻き
付けの巻き始め部を走査する被覆厚検出用センサーによ
り、被覆ピッチ間全域のｍ層厚分布を測定し、その測定
された被ｒＲ厚のうち、最薄部あるいは最厚部の位置指
示信号により、測定の巻き始め部以降の当該部分位置へ
被覆厚検出用センサーを追従させ、前記被覆ピッチ間の
被覆厚の最薄部あるいは最厚部を測定し、かつ数回転毎
に最薄部あるいは最厚部を測定し直し、測定位置を補正
するようにしたのである。That is, the present invention provides, on a coating layer formed by spirally wrapping a synthetic resin sheet from a T-die around the outer periphery of a steel pipe that moves forward while rotating, the coating thickness is determined by scanning the starting portion of the winding of the sheet. The detection sensor measures the m-layer thickness distribution over the entire area between the coating pitches, and the position indication signal of the thinnest or thickest part of the measured rR thickness is used to locate the relevant part after the start of winding. The coating thickness detection sensor is made to follow the position, and the thinnest or thickest part of the coating thickness between the coating pitches is measured, and the thinnest or thickest part is re-measured every few rotations to determine the measurement position. I decided to correct it.
「実３Ｉ例」 本発明の実施例を第１図に基づき以下に説明する。“Actual 3I cases” An embodiment of the present invention will be described below based on FIG.
第１図において、ｌは、図示してないスキューローラー
によって回転しながら前進する鋼管であって、この鋼管
１の外周には、Ｔダイからの例えばポリエチレンのよう
な合成樹脂シート２がスパイラル状に重ね巻きされ、被
覆層が形成される。In FIG. 1, reference numeral 1 denotes a steel pipe that moves forward while being rotated by a skew roller (not shown), and around the outer periphery of this steel pipe 1, a synthetic resin sheet 2 such as polyethylene from a T-die is spirally formed. The material is wound in layers to form a covering layer.
１′は、前記被覆層が形成された合成樹脂被覆網管であ
って、この合成４！４脂被ｒｉ鋼管１′の直下の作業床
上には、架台３が設置されており、この架台３上にはフ
レーム４が没けられている。Reference numeral 1' denotes a synthetic resin-coated network pipe on which the coating layer is formed, and a pedestal 3 is installed on the work floor directly below this synthetic 4!4 fat-covered steel pipe 1'. Frame 4 is missing.
前記フレーム４内には、前記合成樹脂液ｒｉ鋼管１′の
長手方向に沿うスクリューシャフト５とガイドバー６と
が上下の位置関係をもって平行に支承されており、この
スクリューシャフト５とガイドバー６には、センサー支
持アーム７が嵌装されている。In the frame 4, a screw shaft 5 and a guide bar 6 extending along the longitudinal direction of the synthetic resin liquid RI steel pipe 1' are supported in parallel in a vertical positional relationship. The sensor support arm 7 is fitted.
このセン号−支持アーム７の上端には、超音波厚さ計に
おける被覆厚検出用センサー８が、前記合成樹脂被覆鋼
管１′の外面に対向して設けられている。A sensor 8 for detecting coating thickness in an ultrasonic thickness gauge is provided at the upper end of this support arm 7 so as to face the outer surface of the synthetic resin-coated steel pipe 1'.
なお、前記センサー支持アーム７の上半部は、ハンドル
７ａの操作により上下動するようになっており、被覆厚
検出用センサー８と合成樹脂被覆≦４管１′の外面との
対向間隙を所要のものに調整する。The upper half of the sensor support arm 7 can be moved up and down by operating the handle 7a, and a required gap is provided between the coating thickness detection sensor 8 and the outer surface of the synthetic resin coating≦4 pipes 1'. Adjust to that of
前記スクリューシャフト５は、可逆モーター９により回
転され、前記センサー支持アーム７を介して被覆厚検出
用センサー８を、合成樹脂被覆鋼管１′の長手方向に沿
って走査させ、それにより被覆ピンチ間全域の被覆厚分
布を測定するようになつている。The screw shaft 5 is rotated by a reversible motor 9, and the coating thickness detection sensor 8 is caused to scan along the longitudinal direction of the synthetic resin-coated steel pipe 1' via the sensor support arm 7, thereby scanning the entire area between the coating pinches. It is now possible to measure the coating thickness distribution of
前記可逆モーター９の回転軸には、被覆厚検出用センサ
ー８の位置測定用パルスジェネレーター１０が設けられ
ている。A pulse generator 10 for position measurement of the coating thickness detection sensor 8 is provided on the rotating shaft of the reversible motor 9.
前記被覆厚検出用センサー８からの超音波検出信号は、
超音波厚さ計１１に入力され、被覆厚が測定される。The ultrasonic detection signal from the coating thickness detection sensor 8 is
It is input to the ultrasonic thickness gauge 11 and the coating thickness is measured.
前記超音波厚さ計１１による被覆厚の測定値は、測定条
件設定器１２により予め各種条件が入力された補正演算
器１３によって補正され、この補正演算器１３からの補
正値を、記録器１４にて記録するか、あるいはその他の
出力装置への入力信号とする。The measurement value of the coating thickness by the ultrasonic thickness gauge 11 is corrected by a correction calculator 13 into which various conditions are inputted in advance by the measurement condition setting device 12. or as an input signal to other output devices.
一方、前記補正演算８１３からの補正値は、演算器Ｉ５
によって被覆厚の最薄部と最厚部と７．こ選別されると
共に、パルスジェネレータ−エＯがらの被覆厚検出用セ
ンサー８の位置検出信号と、前記測定条件設定器１２か
らの測定条件信号とが演算器１５に入力され、被覆厚の
最薄部か最厚部かのいずれか一方あるいは交互に測定す
るかを演算し、２回目からの測定位置を制御器１６に指
令し、制御５１６を介して可逆モーター９を制御し、被
覆厚検出用センサー８を指定位置まで走査させ、以降の
測定を行う。On the other hand, the correction value from the correction calculation 813 is calculated by the calculation unit I5.
7. The thinnest part and the thickest part of the coating thickness. At the same time, the position detection signal of the coating thickness detection sensor 8 of the pulse generator and the measurement condition signal from the measurement condition setting device 12 are input to the calculator 15, and the thinnest coating thickness is selected. It calculates whether to measure either the thickest part or the thickest part or alternately, instructs the controller 16 to determine the measurement position from the second time, and controls the reversible motor 9 via the control 516 to detect the coating thickness. The sensor 8 is scanned to the specified position and subsequent measurements are performed.
「発明の効果」
従来の合成樹脂被覆鋼管の被覆厚測定方法では二組の被
覆厚挟出用センサーを使用していたが、本発明方法によ
れば、１（１１の被覆厚検出用センサーによって被覆厚
の最薄部あるいは最厚部を、精度よく測定することがで
き、しかも設備費を低減できる。"Effects of the Invention" The conventional method for measuring the coating thickness of synthetic resin-coated steel pipes uses two sets of coating thickness detection sensors, but according to the method of the present invention, one (11) coating thickness detection sensors are used to measure the coating thickness. The thinnest part or the thickest part of the coating thickness can be measured with high accuracy, and equipment costs can be reduced.
第１図は本発明方法の実施例を示す説明図である。
ｌ・・・鋼管、１′・・・合成樹脂被覆鋼管、２・・・
合成樹脂シート、３・・・架台、４・・・フレーム、５
・・・スクリューシャフト、６・・・ガイドバー、７・
・・センサー支持アーム、７ａ・・・ハンドル、８・・
・被覆厚検出用センサー、９・・・可逆モーター、ＩＯ
・・・パルスジェネレーター、１１・・・超音波厚さ計
、１２・・・測定条件設定器、１３・・・補正演算器、
１４・・・記録器、１５・・・演算器、１６・・・制御
器FIG. 1 is an explanatory diagram showing an embodiment of the method of the present invention. l...Steel pipe, 1'...Synthetic resin coated steel pipe, 2...
Synthetic resin sheet, 3... Frame, 4... Frame, 5
...Screw shaft, 6...Guide bar, 7.
...Sensor support arm, 7a...Handle, 8...
・Coating thickness detection sensor, 9... Reversible motor, IO
... Pulse generator, 11... Ultrasonic thickness gauge, 12... Measurement condition setting device, 13... Correction calculator,
14...Recorder, 15...Arithmetic unit, 16...Controller
Claims (1)
樹脂シートをスパイラル状に巻き付けて形成された被覆
層上において、前記シートの巻き付けの巻き始め部を走
査する被覆厚検出用センサーにより、被覆ピッチ間全域
の被覆厚分布を測定し、その測定された被覆厚のうち、
最薄部あるいは最厚部の位置指示信号により、測定の巻
き始め部以降の当該部分位置へ被覆厚検出用センサーを
追従させ、前記被覆ピッチ間の被覆厚の最薄部あるいは
最厚部を測定し、かつ数回転毎に最薄部あるいは最厚部
を測定し直し、測定位置を補正することを特徴とする合
成樹脂被覆鋼管の被覆厚測定方法。On the coating layer formed by spirally winding a synthetic resin sheet from a T-die around the outer periphery of a rotating and advancing steel pipe, a coating thickness detection sensor that scans the beginning of the winding of the sheet is used to measure the coating thickness. Measure the coating thickness distribution over the entire area between the pitches, and out of the measured coating thickness,
The coating thickness detection sensor is made to follow the position of the part after the start of winding to measure the thinnest part or the thickest part of the coating thickness between the coating pitches by the position indication signal of the thinnest part or the thickest part. A method for measuring the coating thickness of a synthetic resin-coated steel pipe, characterized in that the thinnest part or the thickest part is remeasured every few rotations and the measurement position is corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21685686A JPS6371612A (en) | 1986-09-12 | 1986-09-12 | Coating thickness measuring method for synthetic resin coated steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21685686A JPS6371612A (en) | 1986-09-12 | 1986-09-12 | Coating thickness measuring method for synthetic resin coated steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6371612A true JPS6371612A (en) | 1988-04-01 |
Family
ID=16694977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21685686A Pending JPS6371612A (en) | 1986-09-12 | 1986-09-12 | Coating thickness measuring method for synthetic resin coated steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6371612A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150308043A1 (en) * | 2012-12-11 | 2015-10-29 | Technip France | Method for producing an underwater pipe and device for implementing same |
| CN111256641A (en) * | 2020-01-15 | 2020-06-09 | 佛山市禅城区建设工程质量安全检测站 | Steel bar scanner |
-
1986
- 1986-09-12 JP JP21685686A patent/JPS6371612A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150308043A1 (en) * | 2012-12-11 | 2015-10-29 | Technip France | Method for producing an underwater pipe and device for implementing same |
| US9896800B2 (en) * | 2012-12-11 | 2018-02-20 | Technip France | Method for producing an underwater pipe |
| CN111256641A (en) * | 2020-01-15 | 2020-06-09 | 佛山市禅城区建设工程质量安全检测站 | Steel bar scanner |
| CN111256641B (en) * | 2020-01-15 | 2021-11-23 | 佛山市禅城区建设工程质量安全检测站 | Steel bar scanner |
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