JPH01307651A - Diagnostic method for deterioration of fluid transport pipe - Google Patents
Diagnostic method for deterioration of fluid transport pipeInfo
- Publication number
- JPH01307651A JPH01307651A JP13865788A JP13865788A JPH01307651A JP H01307651 A JPH01307651 A JP H01307651A JP 13865788 A JP13865788 A JP 13865788A JP 13865788 A JP13865788 A JP 13865788A JP H01307651 A JPH01307651 A JP H01307651A
- Authority
- JP
- Japan
- Prior art keywords
- fluid transport
- transport pipe
- metallic
- deterioration
- electric insulator
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 34
- 230000006866 deterioration Effects 0.000 title claims abstract description 9
- 238000002405 diagnostic procedure Methods 0.000 title 1
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 238000005299 abrasion Methods 0.000 claims abstract 3
- 239000002184 metal Substances 0.000 claims description 38
- 239000000615 nonconductor Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 239000003989 dielectric material Substances 0.000 abstract 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は原油、天然ガスの如き流体を輸送する流体輸送
管の劣化診断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 diagnosing deterioration of fluid transport pipes that transport fluids such as crude oil and natural gas.
上記流体輸送管はプラスチック内管の上に複数の金属条
を巻付けて金属補強層を設け、外部シースを施してなる
ものである。この種の流体輸送管は、海中等に布設して
用いられるため、波浪による繰り返し曲げを受けること
が多い。The fluid transport tube is made by wrapping a plurality of metal strips around a plastic inner tube to provide a metal reinforcing layer and an outer sheath. Since this type of fluid transport pipe is installed and used in the ocean, it is often subjected to repeated bending due to waves.
このように流体輸送管が繰り返し曲げを受けると、金属
条の接触部が相対的にずれるため、金属条が摩耗して補
強機能がなくなり、流体輸送管が破損して流体が漏洩し
、環境を汚染したり、流体輸送が出来なくなる等の事故
が生じる欠点があった。When a fluid transport pipe is repeatedly bent in this way, the contact parts of the metal strips become relatively misaligned, which causes the metal strips to wear out and lose their reinforcing function, causing the fluid transport pipe to break and cause fluid to leak, causing environmental damage. This method has the disadvantage of causing accidents such as contamination and the inability to transport fluids.
本発明は上記の欠点を除去し、流体漏洩又は流体輸送不
能の事故を未然に防止するようにした流体輸送管の劣化
診断方法に関するもので、プラスチック内管の上に複数
の金属条を巻付けて金属補強層を設け、外部シースを施
してなる流体輸送管の前記金属条を電気絶縁物で被覆し
、電気絶縁物の摩耗によりこれが除去されて金属茶間に
導通が生じることを検出することを特徴とする。The present invention relates to a method for diagnosing deterioration of a fluid transport pipe, which eliminates the above-mentioned drawbacks and prevents accidents such as fluid leakage or failure to transport fluid. The metal strip of the fluid transport pipe is provided with a metal reinforcing layer and an external sheath is coated with an electrical insulator, and this is removed due to wear of the electrical insulator, and it is detected that conduction occurs between the metal layers. It is characterized by
上記のように、金属補強層を構成する金属条が電気絶縁
物で被覆されていると、流体輸送管が波浪による繰り返
し曲げを受け、金属条の接触部が相対的にずれたときに
、電気絶縁物が摩耗してその一部又は全部が除去され、
金属条の表面が露出し、金属条間が導通状態となる。こ
れを検出することにより、金属条同志がこすれて摩耗開
始の状態になったかどうか流体輸送管の劣化診断を行う
ことが可能となり、流体輸送管の強度が低下して事故に
至るのを未然に防止することが出来る。As mentioned above, if the metal strips constituting the metal reinforcing layer are covered with an electrical insulator, when the fluid transport pipe is repeatedly bent by waves and the contact parts of the metal strips are displaced relative to each other, electrical The insulation is worn out and some or all of it is removed,
The surface of the metal strips is exposed, and the metal strips become electrically conductive. By detecting this, it is possible to diagnose the deterioration of the fluid transport pipe to see if the metal strips are rubbing against each other and starting to wear out, thereby preventing the strength of the fluid transport pipe from decreasing and causing an accident. It can be prevented.
次に本発明の一実施例を図面により詳細に説明すると、
第１図に示すものは、本発明の対象となる流体輸送管１
で、内部に原油、天然ガスの如き流体が流れて輸送され
るプラスチック内管２と、プラスチック内管２の上に、
複数の例えばステンレス製の金属条３を所定ピッチでス
パイラル状に突き合わせ巻付けて設けた金属補強層４と
、金属補強Ｎ４の上に押出し等により施されたプラスチ
ック製の外部シース５とからなり、該金属条３の外周面
には第２図に示すようにポリ塩化ビニール、ポリエチレ
ン等の電気絶縁物６が押出し等により被覆されて構成さ
れている。Next, one embodiment of the present invention will be explained in detail with reference to the drawings.
What is shown in FIG. 1 is a fluid transport pipe 1 to which the present invention is applied.
Then, there is a plastic inner pipe 2 in which a fluid such as crude oil or natural gas flows and is transported, and on top of the plastic inner pipe 2,
It consists of a metal reinforcing layer 4 formed by spirally butting and winding a plurality of metal strips 3 made of stainless steel, for example, at a predetermined pitch, and an outer sheath 5 made of plastic applied by extrusion or the like on the metal reinforcing layer N4. As shown in FIG. 2, the outer peripheral surface of the metal strip 3 is coated with an electrical insulating material 6 such as polyvinyl chloride or polyethylene by extrusion or the like.
この流体輸送管ｌは海中等に布設して使用されるが、波
浪による繰り返し曲げを受けると金属条３の接触部が相
対的にずれ、金属条３が摩耗して補強機能を失ってくる
。これを検知するため、第３図に示すように、流体輸送
管１の両方の端末部７から金属補強層４の各金属条３の
端部３ａ、３ｂにリード線８を接続し金属条３に電圧を
印加し、例えば第４図に示すような電気回路を形成する
。This fluid transport pipe 1 is used by being laid in the sea, but when it is repeatedly bent by waves, the contact portion of the metal strip 3 becomes relatively displaced, the metal strip 3 wears out, and loses its reinforcing function. In order to detect this, as shown in FIG. A voltage is applied to form an electric circuit as shown in FIG. 4, for example.
この回路図かられかるように、各金属条３は一つ置きに
一方の端部３ａ相互がリードｖＡ８で電気的に接続され
るが、他方の端部３ｂは非接続状態となり、その他の金
属条３は逆に一方の端部３ａが非接続状態となるのに対
し、他方の端部３ｂ相互がリード線８で電気的に接続さ
れるようになっている。As can be seen from this circuit diagram, one end 3a of each metal strip 3 is electrically connected to each other by a lead vA8, but the other end 3b is not connected, and other metal strips 3 Conversely, one end 3a of the strip 3 is unconnected, while the other end 3b is electrically connected to each other by a lead wire 8.
このような構成により、流体輸送管１が正常であれば、
金属条３に被覆された電気絶縁物６が除去されないため
、金属条間が導通状態とならないが、波浪による繰り返
し曲げを受け、金属条３の接触部が相対的にずれたとき
に、電気絶縁物６が摩耗してその一部又は全部が除去さ
れると、金属条３の表面に露出部９が形成されて金属条
間が電気的に導通状態となり、金属条３間に電流が流れ
る。これを検出することにより、金属条同志がこすれて
摩耗開始の状態になったかどうか流体輸送管の劣化診断
を行うことが可能となる。With this configuration, if the fluid transport pipe 1 is normal,
Since the electrical insulator 6 coated on the metal strip 3 is not removed, the metal strips do not become electrically conductive.However, when the contact portions of the metal strip 3 are relatively shifted due to repeated bending due to waves, the electrical insulation When the object 6 is worn out and a part or all of it is removed, an exposed portion 9 is formed on the surface of the metal strip 3, and the metal strips become electrically conductive, so that a current flows between the metal strips 3. By detecting this, it becomes possible to diagnose the deterioration of the fluid transport pipe to see if the metal strips are rubbing against each other and are beginning to wear out.
以上のように、本発明は流体輸送管の金属条を電気絶縁
物で被覆し、電気絶縁物の摩耗によりこれが除去されて
金属条間に導通が生じることを検出するものであるから
、金属条同志がこすれて摩耗開始の状態になったかどう
か流体輸送管の劣化診断を行うことが可能となり、流体
輸送管の強度が低下して流体漏洩又は流体輸送不能の事
故が生じるのを未然に防止することが出来る。As described above, the present invention covers the metal strips of a fluid transport pipe with an electrical insulator, and detects when the electrical insulation is removed due to wear and conduction occurs between the metal strips. It is now possible to diagnose the deterioration of fluid transport pipes to see if they have started to wear out due to rubbing, and prevent fluid leaks or accidents where fluid cannot be transported due to a decrease in the strength of the fluid transport pipes. I can do it.
第１図は本発明の対象となる流体輸送管を示す側面図、
第２図はその金属条の拡大断面図、第３図は本発明の一
実施例を示す説明図、第４図は流体輸送管の劣化診断方
決の電気回路図である。
■−流体輸送管、２・・プラスチック内管、３・−金属
条、３ａ、３ｂ１．金属条の端部、４ ・金属補強層、
５・・・外部シース、６・−電気絶縁物、７・−・端末
部、８− リード線、９・−・露出部。
特許出願人 古河電気工業株式会社
第１図
第２図
第３図
第４図FIG. 1 is a side view showing a fluid transport pipe to which the present invention is applied;
FIG. 2 is an enlarged sectional view of the metal strip, FIG. 3 is an explanatory diagram showing an embodiment of the present invention, and FIG. 4 is an electric circuit diagram of a method for diagnosing deterioration of a fluid transport pipe. ■-Fluid transport pipe, 2...Plastic inner pipe, 3--Metal strip, 3a, 3b1. End of metal strip, 4 Metal reinforcing layer,
5... External sheath, 6... Electrical insulator, 7... Terminal part, 8- Lead wire, 9... Exposed part. Patent applicant Furukawa Electric Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
強層を設け、外部シースを施してなる流体輸送管の前記
金属条を電気絶縁物で被覆し、電気絶縁物の摩耗により
これが除去されて金属条間に導通が生じることを検出す
ることを特徴とする流体輸送管の劣化診断方法。A plurality of metal strips are wound around a plastic inner tube to provide a metal reinforcing layer, and an outer sheath is applied.The metal strips of the fluid transport tube are coated with an electrical insulator, and this is removed by abrasion of the electrical insulator. A method for diagnosing deterioration of a fluid transport pipe, the method comprising detecting the occurrence of conduction between metal strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13865788A JPH01307651A (en) | 1988-06-06 | 1988-06-06 | Diagnostic method for deterioration of fluid transport pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13865788A JPH01307651A (en) | 1988-06-06 | 1988-06-06 | Diagnostic method for deterioration of fluid transport pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01307651A true JPH01307651A (en) | 1989-12-12 |
Family
ID=15227098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13865788A Pending JPH01307651A (en) | 1988-06-06 | 1988-06-06 | Diagnostic method for deterioration of fluid transport pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01307651A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0451655U (en) * | 1990-09-07 | 1992-04-30 | ||
| CN110207023A (en) * | 2019-06-03 | 2019-09-06 | 中联重科股份有限公司 | System and method for conveying viscous materials and readable storage medium |
-
1988
- 1988-06-06 JP JP13865788A patent/JPH01307651A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0451655U (en) * | 1990-09-07 | 1992-04-30 | ||
| CN110207023A (en) * | 2019-06-03 | 2019-09-06 | 中联重科股份有限公司 | System and method for conveying viscous materials and readable storage medium |
| CN110207023B (en) * | 2019-06-03 | 2024-08-09 | 中联重科股份有限公司 | Viscous material delivery system, method and readable storage medium |
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