JPH06328567A - Pipe body for repair of pipeline - Google Patents

Pipe body for repair of pipeline

Info

Publication number
JPH06328567A
JPH06328567A JP14549393A JP14549393A JPH06328567A JP H06328567 A JPH06328567 A JP H06328567A JP 14549393 A JP14549393 A JP 14549393A JP 14549393 A JP14549393 A JP 14549393A JP H06328567 A JPH06328567 A JP H06328567A
Authority
JP
Japan
Prior art keywords
pipe
resin layer
tubular
pipeline
synthetic resin
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.)
Granted
Application number
JP14549393A
Other languages
Japanese (ja)
Other versions
JP3156446B2 (en
Inventor
Hiroyuki Sakuragi
弘行 桜木
Masahiro Seshimo
雅博 瀬下
Hiroshi Makimoto
太司 槇本
Shinichi Takebe
紳一 武部
Takuji Sokawa
卓治 惣川
Hitoshi Saito
斉藤  均
Original Assignee
Ashimori Ind Co Ltd
芦森工業株式会社
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 Ashimori Ind Co Ltd, 芦森工業株式会社 filed Critical Ashimori Ind Co Ltd
Priority to JP14549393A priority Critical patent/JP3156446B2/en
Priority claimed from DE69420830T external-priority patent/DE69420830T2/en
Publication of JPH06328567A publication Critical patent/JPH06328567A/en
Priority claimed from NO950249A external-priority patent/NO950249L/en
Application granted granted Critical
Publication of JP3156446B2 publication Critical patent/JP3156446B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To enable uniform expansion of overall length and periphery, and adequately adhere to the inner face of pipeline by consisting of an inner resin layer which has a softening point higher than the temperature of the liquid to be sent into the pipeline and an outer resin layer which has a softening point lower that of the inner resin layer, and by integrally applying a woven fabric the inner face of the inner resin layer. CONSTITUTION:A rigid pipe body 1, consisting of thermoplastic resin is inserted into the inside of a pipeline 2, and heated and pressurized liquid is introduced into the pipe body 1, and the heated and pressurized liquid is sent into the pipe body 1 and expanded, and a rigid pipe is formed within the pipeline 2 and the pipeline 2 is repaid. The pipe body 1 consists of an inner resin layer 5 and an outer resin layer 6 that form a rigid pipe 3, and the inner face of the inner resin layer 5 is applied with a cylindrical woven fabric 4, and the cylindrical woven fabric 4 is integrated with the inner resin layer 5. A material, such as high density polyethylene, which has a softening point higher than a temperature of a liquid sent into the pipeline 2 is used for the inner resin layer 5, and a material, such as linear low density polyethylene, which has a softening point lower than a synthetic resin which forms the inner resin layer 5 is used for the outer resin layer 6.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は、ガス導管、上下水道管
などの、主として地中に埋設された管路に対し、その管
路内に新たに硬質の管を形成し、管路を補修するために
使用する合成樹脂製管体に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to repair a pipeline by forming a new hard pipe in the pipeline mainly buried in the ground such as a gas pipeline and a water and sewer pipe. The present invention relates to a synthetic resin tube body used for
【0002】[0002]
【従来の技術】前述のような管路に対して内張りして補
修する方法として、その管路内に硬質ポリエチレンや硬
質ポリ塩化ビニルなどの硬質の熱可塑性樹脂よりなる管
体を挿通し、その管体を加熱軟化させて加圧して膨ま
せ、管路内に硬質の管を形成することが行われている。
2. Description of the Related Art As a method of lining and repairing a pipe as described above, a pipe made of a hard thermoplastic resin such as hard polyethylene or hard polyvinyl chloride is inserted into the pipe, The tube body is heated and softened, pressurized and expanded to form a hard tube in the conduit.
【0003】そしてこの方法においては、硬質の管体を
管路内に挿通するために、管体を管路内径より小径のも
のを使用するか、又は管体を扁平に折畳みさらにそれを
U字状に折曲げるなどして、管路内に大きな抵抗を生じ
ることなく挿通できるようになし、管体を管路内に挿通
した後、管体内に加熱加圧流体を送入し、管体を軟化さ
せると共に膨ませ、管路内面に沿わせることが行われて
いる。
In this method, in order to insert a rigid pipe into the pipe, a pipe having a diameter smaller than the pipe inner diameter is used, or the pipe is folded flat and further U-shaped. By bending it into a shape so that it can be inserted without causing a large resistance in the pipe, after inserting the pipe into the pipe, the heated and pressurized fluid is fed into the pipe to open the pipe. It is softened and inflated so as to be along the inner surface of the pipeline.
【0004】この技術については、米国特許第4867
921号明細書、第4985196号明細書、特開昭5
8−88281号公報、特開昭64−64827号公
報、特開平2−202431号公報などに記載されてい
る。
This technique is described in US Pat. No. 4,867.
921, 4985196, JP-A-5
It is described in JP-A 8-88281, JP-A-64-64827, JP-A-2-202431.
【0005】しかしながら前述の方法においては、管体
内に加熱流体を送入することにより管体を加熱するの
で、管体をその全長全周に亙って均一に加熱することが
困難であり、部分的に加熱にムラが生じる。
However, in the above-mentioned method, since the tubular body is heated by feeding the heating fluid into the tubular body, it is difficult to heat the tubular body uniformly over the entire circumference thereof, and it is difficult to partially heat the tubular body. Unevenly occurs in heating.
【0006】そのため管体の一部が過度に加熱されて柔
かくなり過ぎたり、また他の部分では十分に加熱され
ず、十分に軟化されない部分が生じる。そのためこの状
態で管体に内圧がかかると、部分的な軟化の程度によっ
て膨脹の仕方にムラが生じ、強く軟化された部分が部分
的に膨脹して肉厚が薄くなったり、クラックが生じたり
していた。
Therefore, a part of the tubular body is excessively heated and becomes too soft, and the other part is not sufficiently heated and is not softened sufficiently. Therefore, if internal pressure is applied to the pipe in this state, the degree of partial softening causes unevenness in the expansion method, and the strongly softened part partially expands and the wall thickness becomes thin or cracks occur. Was.
【0007】特に筒状の管体を扁平に折畳み、さらにそ
れを略U字状に曲げて管路に挿通する方法においては、
かかる状態の管体を再度筒状に膨ませる必要があるが、
加熱にムラが生じると、折畳み部分が適切に延ばされな
いままで過度に加熱された部分のみが膨脹してしまう恐
れがある。
In particular, in a method of folding a tubular body into a flat shape, bending it into a substantially U shape and inserting it into a conduit,
It is necessary to expand the tubular body in this state again into a tubular shape,
If the heating is uneven, only the excessively heated portion may expand without the folded portion being properly extended.
【0008】従ってその問題点を解決するために、硬質
の合成樹脂管の内面に筒状織布を配し、当該筒状織布を
合成樹脂管に一体化せしめたものを考案し、先に実用新
案登録出願している。
Therefore, in order to solve the problem, a device in which a tubular woven fabric is arranged on the inner surface of a hard synthetic resin pipe and the tubular woven fabric is integrated with the synthetic resin pipe is devised. Apply for utility model registration.
【0009】[0009]
【発明が解決しようとする課題】しかしながらこのもの
では、管体内に加熱加圧流体を送入して合成樹脂管を軟
化させると、合成樹脂の強度が低下し、合成樹脂管と筒
状織布とが剥がれて合成樹脂管のみが膨んでしまうこと
がある。
However, in this one, when the heated and pressurized fluid is fed into the pipe body to soften the synthetic resin pipe, the strength of the synthetic resin is lowered and the synthetic resin pipe and the tubular woven cloth are reduced. Only the synthetic resin tube may swell due to peeling.
【0010】特に管路の曲がり部においては、管体を管
路に挿通したときに管体は管路の曲りの内側に沿って配
置されるため、管体を管路に沿わせるためには曲がりの
外側に沿った部分が伸長する必要がある。然るに前記管
体においては筒状織布は伸長性に乏しいため、合成樹脂
管のみが筒状織布から剥がれて伸長し、過度に引伸ばさ
れて厚みが減少したり、クラックやひゞ割れを生じたり
破損したりすることが多いのである。
Particularly, in the curved portion of the pipe, since the pipe is arranged along the inside of the bend of the pipe when the pipe is inserted into the pipe, it is necessary to arrange the pipe along the pipe. The part along the outside of the bend must extend. However, in the tubular body, since the tubular woven cloth is poor in extensibility, only the synthetic resin tube is peeled from the tubular woven cloth and stretched, and it is excessively stretched to reduce the thickness, or cracks or cracks are generated. It often occurs and breaks.
【0011】合成樹脂管を構成する合成樹脂として軟化
点の高いものを使用し、又は管体内に送入する加熱加圧
流体の温度を低いものとすることにより、合成樹脂の強
度を確保して筒状織布との剥がれを防止することができ
るが、管体の膨脹時に合成樹脂管が十分に軟化していな
いため、管体を十分に膨脹させて管路内面に沿わせるこ
とが困難である。
The strength of the synthetic resin is ensured by using a synthetic resin having a high softening point as the synthetic resin forming the synthetic resin tube or by lowering the temperature of the heating and pressurizing fluid fed into the tubular body. Although it can be prevented from peeling off from the tubular woven cloth, it is difficult to fully expand the pipe body so that it fits inside the pipe because the synthetic resin pipe is not sufficiently softened when the pipe body expands. is there.
【0012】殊に管体内に加熱加圧流体を送入しても、
管体の外面は冷えた管路に接触しているために十分に加
熱されず、この外面付近の合成樹脂が剛直であることに
より膨脹し得ない。
In particular, even if a heated and pressurized fluid is fed into the pipe,
The outer surface of the tubular body is not sufficiently heated because it is in contact with the cold conduit, and the synthetic resin near this outer surface is rigid and cannot expand.
【0013】筒状織布を合成樹脂管の外面又は肉厚内に
配置することにより筒状織布と合成樹脂管との剥がれを
防止することはできるが、管体の製造が困難であり、ま
た管路を補修した後に管路の分岐部において管体に穿孔
する際には、内面に筒状織布が配置されているほうが穿
孔が容易であって、内面に筒状織布を配置するのが好ま
しい。
By disposing the tubular woven cloth on the outer surface or in the wall thickness of the synthetic resin pipe, it is possible to prevent the tubular woven cloth and the synthetic resin pipe from peeling off, but it is difficult to manufacture the tubular body. Further, when the pipe body is perforated at the branch portion of the pipe after repairing the pipe, the perforation is easier when the tubular woven fabric is arranged on the inner surface, and the tubular woven fabric is arranged on the inner surface. Is preferred.
【0014】本発明はかかる事情に鑑みなされたもので
あって、加熱加圧流体を送入することにより部分的に加
熱のムラが生じても、膨脹の仕方にばらつきが生じるこ
とがなく、且つ筒状織布と合成樹脂管とが剥がれること
もなく、全長全周に亙って均等に膨脹し、管路内面に適
切に密着し得る管体を提供することを目的とするもので
ある。
The present invention has been made in view of the above circumstances, and even if the heating and pressurizing fluid is fed in to cause partial heating unevenness, the expansion does not vary. It is an object of the present invention to provide a tubular body that can be expanded uniformly over the entire length of the tubular woven cloth without being peeled off from the tubular cloth and can be appropriately adhered to the inner surface of the pipeline.
【0015】[0015]
【課題を解決する手段】而して本発明は、管路内に熱可
塑性樹脂よりなる硬質の管体を挿通し、当該管体内に加
熱加圧流体を送入して加熱加圧して膨脹させ、管路内に
硬質の管を形成して管路を補修する方法において使用す
る管体において、前記管体内に送入される加熱加圧流体
の温度よりも高い軟化点を有する合成樹脂よりなる内層
樹脂層と、当該内層樹脂層の合成樹脂よりも低い軟化点
を有する合成樹脂よりなる外層樹脂層と、前記内層樹脂
層の内面に貼着されて一体化された筒状織布とよりなる
ことを特徴とするものである。
According to the present invention, therefore, a hard pipe made of a thermoplastic resin is inserted into a pipe, and a heating and pressurizing fluid is fed into the pipe to expand by heating and pressurizing the fluid. A tubular body used in a method of repairing a pipeline by forming a hard tube in the pipeline, which is made of a synthetic resin having a softening point higher than the temperature of a heating and pressurizing fluid fed into the tubular body. An inner resin layer, an outer resin layer made of a synthetic resin having a softening point lower than that of the synthetic resin of the inner resin layer, and a tubular woven fabric which is adhered to and integrated with the inner surface of the inner resin layer. It is characterized by that.
【0016】本発明においては、前記内層樹脂層を形成
する合成樹脂として高密度ポリエチレンを使用し、前記
外層樹脂層を形成する合成樹脂として線状低密度ポリエ
チレンを使用するのが好ましい。
In the present invention, it is preferable that high density polyethylene is used as the synthetic resin forming the inner resin layer and linear low density polyethylene is used as the synthetic resin forming the outer resin layer.
【0017】図1は本発明の管体1を管路2に挿通した
状態を示すものであって、管体1は扁平に折畳まれた状
態で略U字状に曲げられている。そしてこの管体1に加
熱加圧流体を送入することにより加熱軟化させ、膨脹さ
せて管路2に密着させ、管路2を補修するものである。
FIG. 1 shows a state in which the pipe body 1 of the present invention is inserted into a pipe line 2. The pipe body 1 is bent into a substantially U-shape in a flatly folded state. Then, by heating and pressurizing fluid is fed into the pipe body 1, the pipe body 2 is heated and softened, expanded and brought into close contact with the pipe line 2, and the pipe line 2 is repaired.
【0018】そして図2は前記管体1を示すものであっ
て、熱可塑性合成樹脂よりなる内層樹脂層5と外層樹脂
層6とにより硬質管3を形成し、前記内層樹脂層5の内
面に筒状の織布4を貼着し、当該筒状織布4を前記内層
樹脂層5に一体化したものである。
FIG. 2 shows the tubular body 1, in which a hard tube 3 is formed by an inner resin layer 5 and an outer resin layer 6 made of a thermoplastic synthetic resin, and a hard tube 3 is formed on the inner surface of the inner resin layer 5. A tubular woven cloth 4 is attached, and the tubular woven cloth 4 is integrated with the inner resin layer 5.
【0019】而して本発明においては、前記内層樹脂層
5を形成する合成樹脂としては、管路2に挿通された管
体1に送入される加熱加圧流体の温度よりも高い軟化点
を有するものが使用され、外層樹脂層6を形成する合成
樹脂としては、内層樹脂層5を形成する合成樹脂よりも
軟化点が低いものが使用される。
In the present invention, therefore, the synthetic resin forming the inner resin layer 5 has a softening point higher than the temperature of the heating and pressurizing fluid fed into the pipe body 1 inserted into the pipe line 2. And a softening point lower than that of the synthetic resin forming the inner resin layer 5 is used as the synthetic resin forming the outer resin layer 6.
【0020】外層樹脂層6を形成する合成樹脂の軟化点
は、管体1に送入される加熱加圧流体の温度よりも低い
ものであることが好ましいが、それに限定されることは
なく、内層樹脂層5を形成する合成樹脂よりも軟化点が
低ければ、加熱加圧流体の温度よりも多少高くても差支
えない。
The softening point of the synthetic resin forming the outer resin layer 6 is preferably lower than the temperature of the heating / pressurizing fluid fed into the tubular body 1, but is not limited thereto. If the softening point is lower than that of the synthetic resin forming the inner resin layer 5, the temperature may be slightly higher than the temperature of the heating and pressurizing fluid.
【0021】合成樹脂及び加熱加圧流体の具体例として
は、内層樹脂層5を形成する合成樹脂として軟化点が約
126℃の高密度ポリエチレンを使用し、前記外層樹脂
層6を形成する合成樹脂として軟化点が約114℃の線
状低密度ポリエチレンを使用し、加熱加圧流体として
1.0kg/cm2 の加圧水蒸気(約121℃)を使用する
のが適当である。
As a specific example of the synthetic resin and the heating and pressurizing fluid, high density polyethylene having a softening point of about 126 ° C. is used as the synthetic resin forming the inner resin layer 5, and the synthetic resin forming the outer resin layer 6 is used. It is suitable to use linear low density polyethylene having a softening point of about 114 ° C. and pressurized steam (about 121 ° C.) of 1.0 kg / cm 2 as the heating and pressurizing fluid.
【0022】また筒状織布4としては、天然又は合成繊
維を筒状に織成したもので、比較的目の粗い組織のもの
が適当である。
The tubular woven fabric 4 is preferably a tubular woven fabric made of natural or synthetic fibers and has a relatively coarse texture.
【0023】またこの管体1を製造する方法としては、
筒状織布4を二層押出し機のヘッド中を通し、当該筒状
織布4の外面から内層樹脂層5を形成する合成樹脂を押
出して、筒状織布4の外面を当該合成樹脂で被覆して一
体化し、さらにその外側に外層樹脂層6を形成する合成
樹脂を押出して被覆し、前記管体1を形成することがで
きる。
Further, as a method of manufacturing this tubular body 1,
The tubular woven fabric 4 is passed through the head of a two-layer extruder, the synthetic resin forming the inner resin layer 5 is extruded from the outer surface of the tubular woven fabric 4, and the outer surface of the tubular woven fabric 4 is made of the synthetic resin. The tubular body 1 can be formed by coating and unifying, and further extruding a synthetic resin that forms the outer resin layer 6 on the outer side and coating the resin.
【0024】[0024]
【作用】本発明の管体1においては、管体1に加熱加圧
流体を送入したとき、管体1の内面に近い内層樹脂層5
は加熱加圧流体の温度より軟化点が高いために過度に軟
化されることがなく、強度が過度に低下することがない
ので筒状織布4が剥がれることがない。
In the tubular body 1 of the present invention, when the heated and pressurized fluid is fed into the tubular body 1, the inner resin layer 5 close to the inner surface of the tubular body 1 is formed.
Since the softening point is higher than the temperature of the heated and pressurized fluid, it is not excessively softened, and the strength is not excessively reduced, so that the tubular woven fabric 4 is not peeled off.
【0025】しかも外層樹脂層6は内層樹脂層5よりも
軟化点が低いので、硬質管3全体としては十分に軟化し
する。
Moreover, since the outer resin layer 6 has a lower softening point than the inner resin layer 5, the hard tube 3 as a whole is sufficiently softened.
【0026】従って本発明の管体1は、硬質管3と筒状
織布4とが一体化されているため、加熱加圧流体により
加圧したときに硬質管3と筒状織布4とが一体となって
膨脹する。また筒状織布4は圧力がかかっても殆ど拡径
されることがなく、且つ外層樹脂層6と筒状織布4とが
剥がれることがないので、硬質管3が部分的に軟化の程
度が異ったり、管路2の曲がり部においても局部的に膨
脹することがなく、全体に亙って均一に膨脹し、管路2
に密着する。
Therefore, in the tubular body 1 of the present invention, since the hard tube 3 and the tubular woven cloth 4 are integrated, when the hard tube 3 and the tubular woven cloth 4 are pressurized by the heating and pressurizing fluid, Expand together. Further, the tubular woven fabric 4 is hardly expanded in diameter even when pressure is applied, and the outer resin layer 6 and the tubular woven fabric 4 are not separated from each other, so that the hard pipe 3 is partially softened. Or the curved portion of the pipeline 2 does not locally expand, and the pipeline 2 expands uniformly over the entire area.
Stick to.
【0027】また管体1を扁平に折畳んだ状態で管路2
に挿通し、その管体1に加熱加圧流体を送入した場合、
折畳み部分が十分に加熱されず、軟化が不十分で円形に
膨みにくくなるが、本発明によれば過度に膨脹すること
なく十分な内圧をかけることができるので、部分的に軟
化が不十分であっても確実に円形に膨ませ、管路2に密
着させることが可能である。
Further, in the state where the pipe body 1 is flatly folded, the pipe line 2
When the heating and pressurizing fluid is fed into the tubular body 1,
The folded portion is not sufficiently heated, and softening is insufficient to make it difficult to swell in a circular shape.However, according to the present invention, sufficient internal pressure can be applied without excessive expansion, so that partial softening is insufficient. Even if there is, it is possible to surely inflate it into a circular shape and bring it into close contact with the conduit 2.
【0028】[0028]
【発明の効果】従って本発明によれば、管路2に挿通さ
れた管体1を加熱した際に、加熱ムラが生じて軟化の程
度が不均一となっても、内圧をかけることにより全体に
亙って均一に膨脹させることができ、しかも管路2の曲
がり部などにおいて硬質管3と筒状織布4との間に剥が
れが生じることがないので、管路2の内面に均等に密着
させて確実に補修することができる。
As described above, according to the present invention, when the tubular body 1 inserted in the tubular passage 2 is heated, even if the degree of softening becomes uneven due to uneven heating, the internal pressure is applied to the entire body. Since it is possible to uniformly inflate the pipe 2, and no peeling occurs between the hard pipe 3 and the tubular woven fabric 4 in the bent portion of the pipe 2, the inner surface of the pipe 2 can be evenly distributed. It can be closely attached and surely repaired.
【0029】また管路2の曲がり部などにおいて従来の
管体1では曲りの外側で管体1が伸びて厚みが薄くなっ
たり、また曲りの内側に皺が生じてクラックが発生する
ことがあったが、本発明の管体1は硬質管3が筒状織布
4で補強されており、その両者が剥がれることがないた
め、曲りの外側が部分的に伸びて薄くなったり、内側の
皺にクラックが生じたりするようなことがない。
Further, in the conventional pipe body 1 at the bent portion of the pipe line 2, the pipe body 1 may extend outside the bend and become thin, or wrinkles may occur inside the bend to cause cracks. However, in the tube body 1 of the present invention, the hard tube 3 is reinforced by the tubular woven cloth 4 and both of them are not peeled off, so that the outside of the bend is partially extended and thinned, or the inside wrinkles are wrinkled. There is no such thing as cracks.
【0030】さらに管体1を膨脹させるために高い内圧
をかけても、その内圧は筒状織布4が負担するため、管
路2に直接に大きな圧力が作用することがなく、管路2
を破損することがない。
Further, even if a high internal pressure is applied to expand the tubular body 1, the tubular woven cloth 4 bears the internal pressure, so that a large pressure does not act directly on the tubular line 2 and the tubular line 2 is prevented.
Will not be damaged.
【図面の簡単な説明】[Brief description of drawings]
【図1】 本発明の管体1を管路2に挿通した状態を示
す横断面図
FIG. 1 is a cross-sectional view showing a state in which a tubular body 1 of the present invention is inserted into a pipeline 2.
【図2】 本発明の管体1の横断面図FIG. 2 is a cross-sectional view of the tubular body 1 of the present invention.
【符号の説明】[Explanation of symbols]
1 管体 2 管路 3 硬質管 4 筒状織布 5 内層樹脂層 6 外層樹脂層 1 Tubular body 2 Pipe line 3 Hard tube 4 Cylindrical woven cloth 5 Inner layer resin layer 6 Outer layer resin layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 武部 紳一 大阪府吹田市岸辺北1丁目4番1号 醇風 寮 (72)発明者 惣川 卓治 滋賀県大津市一里山3丁目1番7号 (72)発明者 斉藤 均 大阪府豊中市上新田1丁目24番E−604 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Takebe 1-4-1, Kishibekita, Suita City, Osaka Prefecture Dorif Dormitory (72) Inventor Takuji Sorikawa 3-7-1 Ichiriyama, Otsu City, Shiga Prefecture (72) ) Inventor Hitoshi Saito 1-24-24 Kaminita, Toyonaka-shi, Osaka E-604

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 管路(2)内に熱可塑性樹脂よりなる硬
    質の管体(1)を挿通し、当該管体(1)内に加熱加圧
    流体を送入して加熱加圧して膨脹させ、管路(2)内に
    硬質の管を形成して管路(2)を補修する方法において
    使用する管体(1)において、前記管体(1)内に送入
    される加熱加圧流体の温度よりも高い軟化点を有する合
    成樹脂よりなる内層樹脂層(5)と、当該内層樹脂層
    (5)の合成樹脂よりも低い軟化点を有する合成樹脂よ
    りなる外層樹脂層(6)と、前記内層樹脂層(5)の内
    面に貼着されて一体化された筒状織布(4)とよりなる
    ことを特徴とする、管路の補修用管体
    1. A hard pipe (1) made of a thermoplastic resin is inserted into a pipe (2), and a heating and pressurizing fluid is fed into the pipe (1) to expand by heating and pressurizing. In the pipe body (1) used in the method for repairing the pipe line (2) by forming a hard pipe in the pipe line (2), heating and pressurization fed into the pipe body (1). An inner resin layer (5) made of a synthetic resin having a softening point higher than the temperature of the fluid, and an outer resin layer (6) made of a synthetic resin having a lower softening point than the synthetic resin of the inner resin layer (5). And a tubular woven cloth (4) which is attached to the inner surface of the inner resin layer (5) and integrated with the inner resin layer (5).
  2. 【請求項2】 前記内層樹脂層(5)を形成する合成樹
    脂が高密度ポリエチレンであり、前記外層樹脂層(6)
    を形成する合成樹脂が線状低密度ポリエチレンであるこ
    とを特徴とする、請求項1に記載の管路の補修用管体
    2. The synthetic resin forming the inner resin layer (5) is high density polyethylene, and the outer resin layer (6).
    The pipe body for repairing a pipeline according to claim 1, characterized in that the synthetic resin forming the resin is linear low density polyethylene.
JP14549393A 1993-05-24 1993-05-24 Pipe repair pipes Expired - Lifetime JP3156446B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14549393A JP3156446B2 (en) 1993-05-24 1993-05-24 Pipe repair pipes

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP14549393A JP3156446B2 (en) 1993-05-24 1993-05-24 Pipe repair pipes
DE69420830T DE69420830T2 (en) 1993-05-24 1994-04-27 REPAIR PIPE, LINE REPAIR METHOD USING THIS TUBE AND REPAIR PIPE REMOVAL METHOD
US08/367,359 US5671778A (en) 1993-05-24 1994-04-27 Repairing tube, method for repairing pipe lines therewith and method for removing the repairing tube
EP94914558A EP0664202B1 (en) 1993-05-24 1994-04-27 Repairing pipe, conduit repairing method using the same pipe, and repairing pipe removing method
PCT/JP1994/000704 WO1994027808A1 (en) 1993-05-24 1994-04-27 Repairing pipe, conduit repairing method using the same pipe, and repairing pipe removing method
CA002140925A CA2140925C (en) 1993-05-24 1994-04-27 Repairing pipe, method for repairing pipe lines therewith and method for removing the repairing pipe
NO950249A NO950249L (en) 1993-05-24 1995-01-23 Repair pipes for pipelines, as well as a method of feeding a pipeline therewith and a method of removing such a casing

Publications (2)

Publication Number Publication Date
JPH06328567A true JPH06328567A (en) 1994-11-29
JP3156446B2 JP3156446B2 (en) 2001-04-16

Family

ID=15386541

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14549393A Expired - Lifetime JP3156446B2 (en) 1993-05-24 1993-05-24 Pipe repair pipes

Country Status (1)

Country Link
JP (1) JP3156446B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100387886C (en) * 2006-06-14 2008-05-14 常州市生富公路材料有限公司 Reinforced thermoplastic plastic pipe and its production method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100387886C (en) * 2006-06-14 2008-05-14 常州市生富公路材料有限公司 Reinforced thermoplastic plastic pipe and its production method

Also Published As

Publication number Publication date
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