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JPH04314525A - Resin pipe introducing method and resin pipe introducing device - Google Patents

Resin pipe introducing method and resin pipe introducing device

Info

Publication number
JPH04314525A
JPH04314525A JP3106546A JP10654691A JPH04314525A JP H04314525 A JPH04314525 A JP H04314525A JP 3106546 A JP3106546 A JP 3106546A JP 10654691 A JP10654691 A JP 10654691A JP H04314525 A JPH04314525 A JP H04314525A
Authority
JP
Japan
Prior art keywords
pipe
resin pipe
existing
existing pipe
heated
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
JP3106546A
Other languages
Japanese (ja)
Other versions
JPH0717011B2 (en
Inventor
Takao Yamamura
山村 隆男
Shintaro Ikeda
新太郎 池田
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.)
Nippon Kokan Koji KK
Original Assignee
Nippon Kokan Koji KK
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 Nippon Kokan Koji KK filed Critical Nippon Kokan Koji KK
Priority to JP3106546A priority Critical patent/JPH0717011B2/en
Publication of JPH04314525A publication Critical patent/JPH04314525A/en
Publication of JPH0717011B2 publication Critical patent/JPH0717011B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00Protection of pipes or objects of similar shape against external or internal damage or wear

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

PURPOSE:A long resin pipe is molded reasonably and inserted easily into an existing pipe for traction. CONSTITUTION:A flat resin pipe 15 which is molded into the same diameter as the inside diameter of an existing pipe 3 or a little smaller outer diameter and processed so that a sectional area becomes small is bent gently along a pipe axis by a pair of uneven molding rollers 6 having the high radius of curvature in the vicinity of a pulling-out port of a heating and pressurizing vessel 4 and premolded. The flat resin pipe 15 is pulled down in the vicinity of the existing pipe, molding-processed gradually by a pair of molding rollers 7, 8 whose radii of curvature become smaller in order and bending of the flat resin pipe is made large. The flat resin pipe bent and molded large is bent by a recessed type roller 9 so that both ends of a widthwise direction are approached and introduced into the existing pipe by molding into a double wall cylindrical state.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】この発明は、下水道,上水道,送
油管その他あらゆる既設配管内に合成樹脂パイプをライ
ニングするときの樹脂パイプの導入方法及び樹脂パイプ
導入装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin pipe introduction method and a resin pipe introduction apparatus for lining synthetic resin pipes into existing pipes such as sewerage, water supply, oil pipes, and all other types of pipes.

【0002】0002

【従来の技術】下水道管や上水道管等の既設管の強度補
強や防食対策、漏水,浸水対策あるいは流量改善などを
目的として、既設管内面に合成樹脂管を形成する工法が
採用されている。
BACKGROUND OF THE INVENTION A method of forming synthetic resin pipes on the inner surface of existing pipes has been adopted for the purpose of reinforcing the strength of existing pipes such as sewer pipes and water pipes, preventing corrosion, preventing water leakage and flooding, and improving flow rates.

【0003】この工法としては、内張り材を反転させて
既設管内面に圧着する反転ライニング工法と、既設管内
に引き込んだ内張り材を拡管して既設管内面に圧着する
ライニング工法とが採用されている。
[0003] Two methods have been adopted for this construction: the inverted lining method, in which the lining material is inverted and crimped onto the inner surface of the existing pipe, and the lining method, in which the lining material is pulled into the existing pipe, expanded, and crimped onto the inner surface of the existing pipe. .

【0004】ライニング工法は、塩化ビニル,ポリプロ
ピレン,ポリエチレン,ポリブデンなどの熱可塑性樹脂
からなる樹脂パイプを既設管内に挿入し、挿入した樹脂
パイプを既設管内壁に密着させる工法である。このライ
ニング工法において、既設管とほぼ同じかやや大きい外
径の樹脂パイプを使用する場合には、樹脂パイプを既設
管内に挿通するために、樹脂パイプを扁平にして断面積
を小さくしている。
The lining method is a method in which a resin pipe made of a thermoplastic resin such as vinyl chloride, polypropylene, polyethylene, or polybutene is inserted into an existing pipe, and the inserted resin pipe is brought into close contact with the inner wall of the existing pipe. In this lining construction method, when using a resin pipe with an outer diameter that is approximately the same or slightly larger than the existing pipe, the resin pipe is flattened to reduce its cross-sectional area in order to be inserted into the existing pipe.

【0005】樹脂パイプの断面積を小さくするためには
、例えば特開昭64−56531号公報,特開平2−4
3024号公報あるいは特開平2−154882号公報
等に示されているように、第1段階として押出し成形さ
れた樹脂パイプを直径方向に平に押し潰して扁平にし、
第2段階として長径方向両端が近接するように長手方向
に対して彎曲させて、断面がU字形状やV字形状に加工
している。そして断面形状がU字形状等になった樹脂パ
イプをドラム等に巻き取り保管している。この樹脂パイ
プを既設管内にライニングするときは、ドラム等に巻取
られた樹脂パイプを既設管の位置に運搬して、U字形状
等になった樹脂パイプを既設管内に挿通し、両端または
一端を密閉構造とし、内部に加熱加圧流体を供給するか
、加熱流体を供給しながらピグなどの拡管具を移動させ
て軟化,膨張させ、既設管内面に密着させている。
[0005] In order to reduce the cross-sectional area of a resin pipe, for example, Japanese Patent Laid-Open No. 64-56531 and Japanese Patent Laid-Open No. 2-4
As shown in Japanese Patent Publication No. 3024 or Japanese Unexamined Patent Publication No. 2-154882, the first step is to flatten an extruded resin pipe in the diametrical direction.
In the second step, the cross section is processed into a U-shape or a V-shape by curving it in the longitudinal direction so that both ends in the major diameter direction are close to each other. Then, a resin pipe having a U-shaped cross section or the like is wound up on a drum or the like and stored. When lining an existing pipe with this resin pipe, transport the resin pipe wound on a drum or the like to the position of the existing pipe, insert the U-shaped resin pipe into the existing pipe, and line both ends or one end of the resin pipe. The tube has a sealed structure, and heated pressurized fluid is supplied inside the tube, or a tube expansion tool such as a pig is moved while supplying heated fluid to soften and expand the tube, and the tube is brought into close contact with the inner surface of the existing tube.

【0006】また、特開平2−196627号公報に示
されているように、扁平加工された状態で樹脂パイプを
ドラムに巻取り、既設管内にライニングするときに、樹
脂パイプを内外から加熱して軟化させながら既設管口ま
で引込み、この樹脂パイプを一対のロ−ラでU字形状に
急激に曲げ加工してから既設管内に挿入している。この
既設管内に挿入された樹脂パイプを内部加熱のみを行い
外部からの加熱を行わない状態で樹脂パイプの外層部を
冷却硬化させて牽引している。
Furthermore, as shown in Japanese Patent Application Laid-Open No. 2-196627, when a flattened resin pipe is wound onto a drum and lined in an existing pipe, the resin pipe is heated from the inside and outside. The resin pipe is pulled into the mouth of an existing pipe while being softened, and then sharply bent into a U-shape using a pair of rollers before being inserted into the existing pipe. The resin pipe inserted into the existing pipe is heated only internally, without external heating, and the outer layer of the resin pipe is cooled and hardened before being pulled.

【0007】[0007]

【発明が解決しようとする課題】上記特開平2−154
882号公報等に示されたライニング工法は、押出し成
形された樹脂パイプの断面積を小さくするため、2段階
の加工工程でU字形状等になるように加工し、この樹脂
パイプをドラム等に巻取っているため、巻取り時の断面
形状が大きく保管,運搬が容易でないという短所があっ
た。
[Problem to be solved by the invention] The above-mentioned Japanese Patent Application Laid-Open No. 2-154
In order to reduce the cross-sectional area of an extruded resin pipe, the lining method shown in Publication No. 882, etc. processes the extruded resin pipe into a U-shape in a two-step processing process, and then molds the resin pipe into a drum, etc. Since it is rolled up, it has a large cross-sectional shape when rolled up, making it difficult to store and transport.

【0008】また、樹脂パイプの口径が大きくなるほど
巻取り時の断面形状が大きくなり、口径が500mm以
上の樹脂パイプでは長い樹脂パイプを巻取ることができ
ず、既設管の長い距離をライニングすることができない
という短所があった。
[0008] Furthermore, the larger the diameter of the resin pipe, the larger the cross-sectional shape when it is rolled up, and it is not possible to wind up a long resin pipe with a diameter of 500 mm or more, making it difficult to line a long distance of existing pipe. The disadvantage was that it was not possible.

【0009】このような短所は、特開平2−19662
7号公報に示されているように、扁平加工された状態で
樹脂パイプをドラムに巻取ることにより解消することが
できる。しかしながら既設管の内径の70%以上の外径
を有する樹脂パイプを既設管に引き込むときには扁平状
態のままでは引き込むことができないため、特開平2−
196627号公報に示された工法は、内外面から加熱
して軟化した扁平樹脂パイプを既設管口近傍まで引出し
てからU字形状に加工して既設管内に挿入している。こ
の扁平樹脂パイプをU字形状に加工するときに一対のロ
−ラで急激に曲げているため、扁平樹脂パイプに加えら
れる応力が大きくなりU字形状の内側が波打つようにな
る。この樹脂パイプの外層面を冷却硬化して既設管内に
牽引しているため、樹脂パイプはU字形状の内側に波打
ち生じたままで既設管内に配設され、加圧膨張したとき
に局部的な歪が残り、割れたり裂けたりするという短所
がある。また、樹脂パイプを既設管内で牽引するときに
内面のみから加熱しているため、内部応力による歪が生
じ、ストレスクラッキングの原因になってしまう危険性
がある。
[0009] Such disadvantages are explained in Japanese Patent Application Laid-Open No. 2-19662.
As shown in Japanese Patent No. 7, this problem can be solved by winding the resin pipe in a flattened state onto a drum. However, when pulling a resin pipe with an outer diameter of 70% or more of the inner diameter of the existing pipe into the existing pipe, it is impossible to pull it into the existing pipe while it is in a flat state.
In the construction method disclosed in Japanese Patent No. 196627, a flat resin pipe that has been heated and softened from the inside and outside is pulled out to the vicinity of the existing pipe opening, processed into a U-shape, and then inserted into the existing pipe. When this flat resin pipe is processed into a U-shape, it is sharply bent by a pair of rollers, so the stress applied to the flat resin pipe becomes large and the inside of the U-shape becomes wavy. Since the outer surface of this resin pipe is cooled and hardened and then pulled into the existing pipe, the resin pipe is installed inside the existing pipe with undulations on the inside of the U-shape, and when it expands under pressure, local distortion occurs. It has the disadvantage that it leaves a residue and can crack or tear. Furthermore, when the resin pipe is pulled inside the existing pipe, it is heated only from the inner surface, so there is a risk that distortion will occur due to internal stress, which may cause stress cracking.

【0010】また、樹脂パイプを既設管内で牽引すると
きに、内外面から加熱していた樹脂パイプの外面からの
加熱を停止し内面のみから加熱しているが、既設管内に
挿入された直後の樹脂パイプに成形加工時の残熱が残り
、その残熱により樹脂パイプの形状が回復して外径が大
きくなり既設管内面に接触するようになってしまう。 このため樹脂パイプと既設管との摩擦が大きくなり、長
距離の施工が困難になるという短所もあった。
[0010] Furthermore, when pulling a resin pipe inside an existing pipe, heating from the outside of the resin pipe, which had been heated from the inside and outside, is stopped and heating is performed only from the inside. Residual heat from the molding process remains in the resin pipe, and the residual heat restores the shape of the resin pipe, increasing its outer diameter and coming into contact with the inner surface of the existing pipe. This also had the disadvantage of increasing friction between the resin pipe and the existing pipe, making long-distance construction difficult.

【0011】この発明はかかる短所を解決するためにな
されたものであり、長さが長い樹脂パイプを無理なく成
形して既設管内に簡単に挿入し牽引することができる樹
脂パイプ導入方法と導入装置を得ることを目的とするも
のである。
[0011] The present invention has been made to solve these shortcomings, and provides a resin pipe introducing method and an introducing device that can easily mold a long resin pipe and easily insert it into an existing pipe and tow it. The purpose is to obtain.

【0012】0012

【課題を解決するための手段】この発明に係る樹脂パイ
プの導入方法は、既設管内径と同径かやや小さい外径に
成形して形状記憶した熱可塑性樹脂パイプを断面積が小
さくなるように扁平加工し、該扁平樹脂パイプを案内し
て既設管内に導入する樹脂パイプ導入方法において、加
熱加圧容器から引出された扁平樹脂パイプを加熱加圧容
器の引出口近傍に設けられ、大きな曲率半径を有する凹
凸一対の成形ロ−ラで管軸に沿って緩やかに曲げ成形し
て既設管近傍まで加熱加圧状態を保持しながら引き降ろ
し、該扁平樹脂パイプの曲げを既設管口近傍に設けられ
曲率半径が順次小さくなっている複数対の成形ロ−ラで
徐々に大きくした後、複数対の成形ロ−ラの回転軸と直
交する回転軸を有する凹型ロ−ラで扁平樹脂パイプの幅
方向両端が近接するように彎曲に成形して既設管内に導
入することを特徴とする。
[Means for Solving the Problems] A method for introducing a resin pipe according to the present invention is to use a thermoplastic resin pipe which has been shaped to have an outer diameter that is the same as or slightly smaller than the inner diameter of an existing pipe so that its cross-sectional area is small. In a resin pipe introduction method in which the flat resin pipe is flattened and guided and introduced into an existing pipe, the flat resin pipe pulled out from the heated and pressurized container is installed near the outlet of the heated and pressurized container, and has a large radius of curvature. The flat resin pipe is bent gently along the pipe axis using a pair of forming rollers with convex and concave surfaces, and then pulled down while maintaining a heated and pressurized state near the existing pipe. After gradually enlarging the radius using multiple pairs of forming rollers that gradually become smaller, both ends of the flat resin pipe in the width direction are formed using concave rollers whose rotational axes are orthogonal to the rotational axes of the plurality of pairs of forming rollers. It is characterized by being formed into a curved shape so that the pipes are close to each other and being introduced into the existing pipe.

【0013】彎曲に成形された樹脂パイプを既設管内に
挿入するときに、彎曲に成形された樹脂パイプの外径よ
り大きな内径を有する蛇腹管を既設管口から一定長さ配
設し、成形された樹脂パイプの外径を蛇腹管で抑えなが
ら既設管内に導入することが好ましい。
[0013] When inserting a curved resin pipe into an existing pipe, a bellows pipe having an inner diameter larger than the outer diameter of the curved resin pipe is installed for a certain length from the existing pipe opening. It is preferable to introduce the resin pipe into the existing pipe while suppressing its outer diameter with a bellows pipe.

【0014】また、この発明に係る樹脂パイプの導入装
置は、既設管内径と同径かやや小さい外径に成形して形
状記憶した熱可塑性樹脂パイプを断面積が小さくなるよ
うに扁平加工し、該扁平樹脂パイプを案内して既設管内
に導入する樹脂パイプ導入装置において、扁平樹脂パイ
プを収納した加熱加圧容器と既設管口間に取り付けられ
、加熱流体を供給しながら扁平樹脂パイプを案内する導
入ガイドホ−スと、該導入ガイドホ−ス内の加熱加圧容
器の引出口近傍に設けられ、大きな曲率半径を有する凹
凸一対の成形ロ−ラと、導入ガイドホ−ス内の既設管口
近傍に設けられ、上記成形ロ−ラの回転軸と平行な回転
軸を有し、曲率半径が順次小さくなっている複数対の成
形ロ−ラと、該成形ロ−ラの後段に配設され複数対の成
形ロ−ラの回転軸と直交する回転軸を有する凹型ロ−ラ
とを備えたことを特徴とする。
[0014] Furthermore, the resin pipe introducing device according to the present invention flattens a thermoplastic resin pipe which has been shaped to have the same diameter or a slightly smaller outer diameter as the inner diameter of the existing pipe to memorize its shape so that its cross-sectional area becomes smaller. In the resin pipe introduction device that guides the flat resin pipe and introduces it into the existing pipe, it is installed between a heated and pressurized container containing the flat resin pipe and the existing pipe opening, and guides the flat resin pipe while supplying heated fluid. An introduction guide hose, a pair of uneven forming rollers with a large radius of curvature that are installed near the outlet of the heated and pressurized container in the introduction guide hose, and A plurality of pairs of forming rollers are provided, each having a rotation axis parallel to the rotation axis of the forming roller, and each having a radius of curvature that is successively smaller; It is characterized by comprising a concave roller having a rotation axis perpendicular to the rotation axis of the forming roller.

【0015】[0015]

【作用】この発明においては、既設管内径と同径かやや
小さい外径に成形して形状記憶した熱可塑性樹脂パイプ
を断面積が小さくなるように扁平加工してドラムに巻回
したり折りたたんで加熱加圧容器に収納した扁平樹脂パ
イプを、加熱加圧流体が循環している導入ガイドホ−ス
内を通して引出し既設管に導入する。この扁平樹脂パイ
プが導入ガイドホ−ス内を通るときに、加熱加圧容器の
引出口近傍で大きな曲率半径を有する凹凸一対の成形ロ
−ラで管軸に沿って緩やかに曲げて予備成形して、扁平
樹脂パイプを既設管近傍までたわむことなしに移動させ
る。既設管近傍まで引き降ろされた扁平樹脂パイプを曲
率半径が順次小さくなっている複数対の成形ロ−ラで徐
々に成形加工することにより、無理な応力を加えずに扁
平樹脂パイプの曲げを大きくする。この大きく曲げ成形
された扁平樹脂パイプを複数対の成形ロ−ラの回転軸と
直交する回転軸を有する凹型ロ−ラで幅方向両端が近接
するように彎曲させて2重壁円筒状に成形して既設管内
に導入する。
[Operation] In this invention, a thermoplastic resin pipe is formed to have an outer diameter that is the same as or slightly smaller than the existing pipe inner diameter, has a shape memory, is flattened to have a smaller cross-sectional area, and then heated by winding or folding it around a drum. A flat resin pipe housed in a pressurized container is drawn out through an introduction guide hose in which heated pressurized fluid is circulated and introduced into the existing pipe. When this flat resin pipe passes through the introduction guide hose, it is preformed by gently bending it along the pipe axis using a pair of concave and convex forming rollers with a large radius of curvature near the outlet of the heated and pressurized container. To move a flat resin pipe to the vicinity of an existing pipe without bending. By gradually forming the flat resin pipe that has been pulled down to the vicinity of the existing pipe using multiple pairs of forming rollers whose radius of curvature is gradually decreasing, the bending of the flat resin pipe can be increased without applying excessive stress. do. This largely bent flat resin pipe is bent into a double-walled cylindrical shape using concave rollers whose rotational axes are orthogonal to the rotational axes of multiple pairs of forming rollers so that both ends in the width direction are close together. and introduce it into the existing pipe.

【0016】この2重壁円筒状に成形された樹脂パイプ
を既設管内に挿入するときに、成形された樹脂パイプの
外径より大きな内径を有する蛇腹管を既設管口から一定
長さ配設し、成形された樹脂パイプの外径を蛇腹管の内
壁で抑えながら既設管内に導入することにより成形時の
残熱により成形された樹脂パイプが形状を回復して外径
が大きくなることを防ぐ。
When inserting this double-walled cylindrical resin pipe into an existing pipe, a bellows pipe having an inner diameter larger than the outer diameter of the molded resin pipe is installed for a certain length from the existing pipe opening. By introducing the molded resin pipe into the existing pipe while suppressing its outer diameter with the inner wall of the bellows pipe, the molded resin pipe is prevented from recovering its shape and increasing its outer diameter due to residual heat during molding.

【0017】[0017]

【実施例】図1はこの発明の一実施例を示す断面図であ
る。図に示すように、樹脂パイプ導入装置1は地中2に
埋設された既設管3と地上に設置された加熱加圧容器4
とを連結する例えば二つ割りの導入ガイドホ−ス5と、
導入ガイドホ−ス5内の加熱加圧容器4引出口近傍に設
けられた上部ガイドロ−ラ6と、既設管3の管口近傍に
互いに近接して設けられた下部ガイドロ−ラ7とスクイ
ズ成形ロ−ラ8及び凹型縦ロ−ラ9を有する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an embodiment of the present invention. As shown in the figure, a resin pipe introduction device 1 includes an existing pipe 3 buried underground 2 and a heated and pressurized container 4 installed above ground.
For example, a split introduction guide hose 5 connecting the
An upper guide roller 6 provided near the outlet of the heated and pressurized container 4 in the introduction guide hose 5, a lower guide roller 7 and a squeeze forming roller provided close to each other near the pipe opening of the existing pipe 3. - roller 8 and concave vertical roller 9.

【0018】導入ガイドホ−ス5の既設管3との接続部
には外周部に弁を有し加熱加圧流体を遮断する遮蔽板1
0が取り付けられている。この導入ガイドホ−ス5の下
端部と地上に設置された温水ボイラや蒸気ボイラ等から
なる加熱流体発生装置11とは加熱流体往路ホ−ス12
で接続され、加熱流体発生装置11と加熱加圧容器4と
は加熱流体復路ホ−ス13で接続されている。
At the connection part of the introduction guide hose 5 to the existing pipe 3, there is a shielding plate 1 having a valve on the outer periphery to shut off heated pressurized fluid.
0 is attached. The lower end of this introduction guide hose 5 and a heated fluid generating device 11 consisting of a hot water boiler, a steam boiler, etc. installed on the ground are connected to a heated fluid outgoing hose 12.
The heating fluid generating device 11 and the heating and pressurizing container 4 are connected by a heating fluid return hose 13.

【0019】上部ガイドロ−ラ6は、図2に示すように
、回転軸を水平方向に取り付けられ、中央部が大きな曲
率半径で凸形をした上ロ−ル61と凹形の下ロ−ル62
とからなり、上ロ−ル61の両端に逃し部63を有する
。下部ガイドロ−ラ7とスクイズ成形ロ−ラ8の回転軸
は上部ガイドロ−ラ6の回転軸と平行に取り付けられて
いる。下部ガイドロ−ラ7は、図3に示すように、中央
部が上部ガイドロ−ラ6より小さな曲率半径で凸形をし
た上ロ−ル71と凹形の下ロ−ル72とからなり、上ロ
−ル71の両端に逃し部73を有する。スクイズ成形ロ
−ラ8は、図4に示すようにし、中央部が下部ガイドロ
−ラ7よりさらに小さな曲率半径で凸形をした上ロ−ル
81と凹形の下ロ−ル82とからなり、上ロ−ル81の
両端には逃し部83を有する。スクイズ成形ロ−ラ8の
後段に設けられた凹型縦ロ−ラ9は回転軸がスクイズ成
形ロ−ラ8の回転軸と直交して取り付けられ、図5に示
すように、曲率半径が大きい左右一対の凹型ロ−ル91
,92からなる。
As shown in FIG. 2, the upper guide roller 6 has a rotating shaft mounted in a horizontal direction, and has an upper roll 61 having a convex center portion with a large radius of curvature, and a concave lower roll 61. 62
The upper roll 61 has relief portions 63 at both ends. The rotating shafts of the lower guide roller 7 and the squeeze forming roller 8 are mounted parallel to the rotating shaft of the upper guide roller 6. The lower guide roller 7, as shown in FIG. The roll 71 has relief portions 73 at both ends. The squeeze forming roller 8 is constructed as shown in FIG. 4 and consists of an upper roll 81 whose central part is convex with a radius of curvature smaller than that of the lower guide roller 7, and a concave lower roll 82. , the upper roll 81 has relief portions 83 at both ends. The concave vertical roller 9 provided after the squeeze forming roller 8 is installed with its rotating shaft perpendicular to the rotating axis of the squeeze forming roller 8, and has a large radius of curvature as shown in FIG. A pair of concave rolls 91
,92.

【0020】既設管3の管口には凹型縦ロ−ラ9のロ−
ル間隙hに応じてあらかじめ定められた内径と一定長さ
を有する蛇腹管13が取り付けられている。
Concave vertical rollers 9 are installed at the pipe opening of the existing pipe 3.
A bellows tube 13 having a predetermined inner diameter and a constant length according to the gap h is attached.

【0021】次に、上記のように構成された樹脂パイプ
の導入装置1を使用して既設管3に扁平樹脂パイプ15
を導入するときの動作を説明する。まず、図6に示すよ
うに、塩化ビニル,ポリプロピレン,ポリエチレン,ポ
リブデンなどの熱可塑性樹脂からなり、既設管3の内径
とほぼ同じかやや小さい外径に形状記憶した樹脂パイプ
15aを押し出し成形により形成する。この樹脂パイプ
15aを加熱雰囲気中で軟化させながら両端内部に空隙
16が残存し、中央部が密着するように押し潰して、図
7に示すように断面積を小さくした扁平樹脂パイプ15
に成形しドラムに巻き取る。
Next, using the resin pipe introducing device 1 configured as described above, a flat resin pipe 15 is inserted into the existing pipe 3.
Explain the operation when introducing. First, as shown in FIG. 6, a resin pipe 15a made of thermoplastic resin such as vinyl chloride, polypropylene, polyethylene, polybutene, etc., and having a shape memorized outer diameter that is approximately the same as or slightly smaller than the inner diameter of the existing pipe 3 is formed by extrusion molding. do. This resin pipe 15a is softened in a heated atmosphere and crushed so that voids 16 remain inside both ends and the center portions are brought into close contact with each other, resulting in a flat resin pipe 15 with a reduced cross-sectional area as shown in FIG.
It is formed into a shape and wound onto a drum.

【0022】この扁平樹脂パイプ15を既設管3の内面
にライニングするときは、ドラムに巻取られた扁平樹脂
パイプ15を加熱保温容器4に収納して加熱流体発生装
置11とともに現地に搬入し、例えば既設管3が下水道
管の場合にはマンホ−ル19近傍の地上に設置する。ま
た、既設管3の遠端からマンホ−ル16まで牽引ベルト
17を通してから既設管3の端部から蛇腹管14を挿入
して既設管3の管口に取り付ける。
When lining the inner surface of the existing pipe 3 with this flat resin pipe 15, the flat resin pipe 15 wound around a drum is stored in a heating and insulating container 4 and transported to the site together with the heated fluid generating device 11. For example, if the existing pipe 3 is a sewer pipe, it is installed on the ground near the manhole 19. Further, after passing the traction belt 17 from the far end of the existing pipe 3 to the manhole 16, the bellows pipe 14 is inserted from the end of the existing pipe 3 and attached to the mouth of the existing pipe 3.

【0023】次に加熱保温容器4の引出口から扁平樹脂
パイプ15の先端を引出してから導入ガイドホ−ス5を
加熱保温容器4と既設管3との間に連結する。このとき
扁平樹脂パイプ15の先端と牽引ベルト17の端部とを
結び付けておく。また、加熱流体発生装置11と導入ガ
イドホ−ス5との間を加熱流体往路ホ−ス12で接続し
、加熱加圧容器4と加熱流体発生装置11との間を加熱
流体復路ホ−ス13で接続する。このようにして、加熱
流体発生装置11で発生する加熱流体の循環系を加熱流
体発生装置11,加熱流体往路ホ−ス12,導入ガイド
ホ−ス5,加熱加圧容器4,加熱流体復路ホ−ス13,
加熱流体発生装置11と形成する。
Next, the tip of the flat resin pipe 15 is pulled out from the outlet of the heating and heat-insulating container 4, and then the introduction guide hose 5 is connected between the heating and heat-insulating container 4 and the existing pipe 3. At this time, the tip of the flat resin pipe 15 and the end of the traction belt 17 are tied together. Further, a heated fluid outgoing hose 12 is connected between the heated fluid generating device 11 and the introduction guide hose 5, and a heated fluid returning hose 13 is connected between the heated and pressurized container 4 and the heated fluid generating device 11. Connect with. In this way, the circulation system of the heating fluid generated in the heating fluid generating device 11 is configured to include the heating fluid generating device 11, the heating fluid outgoing path hose 12, the introduction guide hose 5, the heating and pressurizing container 4, and the heating fluid returning path hose. S13,
A heated fluid generator 11 is formed.

【0024】この状態で加熱流体発生装置11から扁平
樹脂パイプ15の形状回復温度以上から形状記憶温度以
下の軟化温度に加熱された加圧流体を上記循環系に供給
し、ドラムなどに巻き取ってある扁平樹脂パイプ15を
軟化状態にする。そして、既設管3の遠端から牽引ベル
ト17を牽引し、軟化した扁平樹脂パイプ15を加熱加
圧容器4から導入ガイドホ−ス5に張力がかからぬよう
に引出す。このとき、軟化した扁平樹脂パイプ15には
加熱加圧流体による流体圧力が加わっているため、膨張
して形状が回復することなしに扁平のままで円滑に上部
ガイドロ−ラ6に送られる。
In this state, a pressurized fluid heated from the heated fluid generator 11 to a softening temperature above the shape recovery temperature of the flat resin pipe 15 and below the shape memory temperature is supplied to the circulation system, and is wound around a drum or the like. A certain flat resin pipe 15 is brought into a softened state. Then, the traction belt 17 is pulled from the far end of the existing pipe 3, and the softened flat resin pipe 15 is pulled out from the heated and pressurized container 4 so that no tension is applied to the introduction guide hose 5. At this time, since fluid pressure is applied to the softened flat resin pipe 15 by the heated pressurized fluid, it is smoothly sent to the upper guide roller 6 while remaining flat without expanding and recovering its shape.

【0025】上部ガイドロ−ラ6に送られた扁平樹脂パ
イプ15は、図2に示すように大きな曲率半径を有する
上ロ−ル61と下ロ−ル62により中央部を均一におさ
えられながら緩やかに曲げ成形されて下方向に移動する
。この扁平樹脂パイプ15を上部ガイドロ−ラ6で曲げ
成形するときに、扁平樹脂パイプ15の両端部は上ロ−
ル61の逃げ部63に位置するため空隙16がそのまま
残っている。この緩やかに曲げ成形された扁平樹脂パイ
プ15は導入ガイドホ−ス5を通って下部ガイドロ−ラ
7に送られる。この扁平樹脂パイプ15を下部ガイドロ
−ラ7に送るときに、扁平樹脂パイプ15は緩やかに曲
げ成形されているから、撓むことなしに下部ガイドロ−
ラ7まで移動することができる。
As shown in FIG. 2, the flat resin pipe 15 sent to the upper guide roller 6 is held uniformly in the center by an upper roll 61 and a lower roll 62 having a large radius of curvature, and is rolled gently. It is bent and formed and moves downward. When this flat resin pipe 15 is bent and formed by the upper guide roller 6, both ends of the flat resin pipe 15 are bent by the upper guide roller 6.
Since the gap 16 is located in the relief part 63 of the groove 61, the gap 16 remains as it is. This gently bent flat resin pipe 15 is sent to the lower guide roller 7 through the introduction guide hose 5. When this flat resin pipe 15 is fed to the lower guide roller 7, since the flat resin pipe 15 is gently bent, it can be fed to the lower guide roller 7 without bending.
You can move up to La 7.

【0026】下部ガイドロ−ラ7に送られた扁平樹脂パ
イプ15は下部ガイドロ−ラ7により曲げ成形されたか
らスクイズ成形ロ−ラ8に送られ再び曲げ成形される。 このように加熱軟化している扁平樹脂パイプ15を上部
ガイドロ−ラ6で緩やかに曲げ成形してから、下部ガイ
ドロ−ラ7とスクイズ成形ロ−ラ8で徐々に曲げていく
ことにより、扁平樹脂パイプ15に無理な力を加えずに
曲げ成形することができる。したがって扁平樹脂パイプ
15の屈曲部に内しわが生じるたり、断面の形をくずす
ことなしに曲げることができる。この曲げ成形のときも
扁平樹脂パイプ15の両端部は下部ガイドロ−ラ7の上
ロ−ラ71とスクイズ成形ロ−ラ8の上ロ−ラ81の逃
げ部73,83の位置にあって各ロ−ラに接触すること
なしに成形することができる。したがって、扁平樹脂パ
イプ15の両端内部に空隙16をそのまま保持すること
ができる。
The flat resin pipe 15 sent to the lower guide roller 7 is bent and formed by the lower guide roller 7, and then sent to the squeeze forming roller 8 where it is bent again. The flat resin pipe 15, which has been heated and softened, is gently bent by the upper guide roller 6, and then gradually bent by the lower guide roller 7 and squeeze forming roller 8, thereby forming the flat resin pipe. It is possible to bend and form the pipe 15 without applying excessive force. Therefore, the flat resin pipe 15 can be bent without causing internal wrinkles in the bent portion or changing its cross-sectional shape. During this bending, both ends of the flat resin pipe 15 are located at the relief portions 73 and 83 of the upper roller 71 of the lower guide roller 7 and the upper roller 81 of the squeeze forming roller 8, respectively. Molding can be performed without contacting rollers. Therefore, the voids 16 can be maintained inside both ends of the flat resin pipe 15 as they are.

【0027】スクイズ成形ロ−ラ8で曲げ成形された扁
平樹脂パイプ15は凹型縦ロ−ラ9に送られる。凹型縦
ロ−ラ9に送られた扁平樹脂パイプ15はスクイズ成形
ロ−ラ8と直交して取り付けられた曲率半径が大きい左
右一対の凹型ロ−ル91,92により挾まれて幅方向の
両端が近接するように彎曲し、図5に示すように、2重
壁円筒状に成形される。この2重壁円筒状に成形すると
きに扁平樹脂パイプ15はスクイズ成形ロ−ラ8等で上
方向に曲げ成形されているから、簡単に彎曲させること
ができる。凹型縦ロ−ラ9で2重壁円筒状に成形された
扁平樹脂パイプ15は導入ガイドホ−ス5の遮蔽板10
を通り既設管3内に取り付けた蛇腹管14に導入される
。形状回復温度以上から形状記憶温度以下の軟化温度に
加熱,加圧されている2重壁円筒状の扁平樹脂パイプ1
5は蛇腹管14に導入されると加熱加圧流体による加熱
,加圧が解除され、既設管3内の空気に触れて冷却され
徐々に温度が下がる。この温度が下がるときに2重壁円
筒状の扁平樹脂パイプ15は形状を回復して最初に形状
を記憶した円筒形状に戻ろうとする。そこでこの形状が
回復するのを既設管3の内径より小さな径を有する蛇腹
管14で抑制し、扁平樹脂パイプ15を2重壁円筒状の
形状に保つ。このため蛇腹管14の長さを最終端で扁平
樹脂パイプ15の温度が形状回復温度以下にまで冷却さ
れるようにあらかじめ定めておく。
The flat resin pipe 15 bent and formed by the squeeze forming roller 8 is sent to a concave vertical roller 9. The flat resin pipe 15 sent to the concave vertical roller 9 is sandwiched between a pair of left and right concave rolls 91 and 92 with a large radius of curvature, which are installed orthogonally to the squeeze forming roller 8, and are held at both ends in the width direction. are curved so that they are close to each other, and are formed into a double-walled cylindrical shape, as shown in FIG. Since the flat resin pipe 15 is bent upward by a squeeze forming roller 8 or the like when forming into this double-walled cylindrical shape, it can be easily bent. A flat resin pipe 15 formed into a double-walled cylindrical shape by a concave vertical roller 9 serves as a shielding plate 10 for the introduction guide hose 5.
and is introduced into the bellows pipe 14 installed inside the existing pipe 3. A double-walled cylindrical flat resin pipe 1 that is heated and pressurized to a softening temperature from above the shape recovery temperature to below the shape memory temperature.
When the pipe 5 is introduced into the bellows pipe 14, the heating and pressurization by the heated pressurized fluid is released, and the pipe 5 is cooled by coming into contact with the air in the existing pipe 3, and its temperature gradually decreases. When this temperature decreases, the double-walled cylindrical flat resin pipe 15 attempts to recover its shape and return to the cylindrical shape in which the shape was initially memorized. Therefore, recovery of this shape is suppressed by the bellows pipe 14 having a diameter smaller than the inner diameter of the existing pipe 3, and the flat resin pipe 15 is maintained in a double-walled cylindrical shape. For this reason, the length of the bellows pipe 14 is determined in advance so that the temperature of the flat resin pipe 15 at the final end is cooled to below the shape recovery temperature.

【0028】この冷却された2重壁円筒状の扁平樹脂パ
イプ15が牽引ベルト17により牽引して既設管3内に
挿入する。この扁平樹脂パイプ15を既設管3内で牽引
するときに扁平樹脂パイプ15は2重壁円形形状を保持
したまま硬化しているから、長い距離を牽引しても伸び
や損傷が生じることを防ぐことができる。また2重壁円
筒状の扁平樹脂パイプ15が蛇腹管14を通るときに、
蛇腹管14との接触面積が小さいから摩擦力を小さくす
ることができ、牽引の抵抗増大を抑えることができる。
The cooled double-walled cylindrical flat resin pipe 15 is pulled by a pulling belt 17 and inserted into the existing pipe 3. When this flat resin pipe 15 is towed within the existing pipe 3, the flat resin pipe 15 is hardened while maintaining its double-walled circular shape, so it can be prevented from stretching or being damaged even if it is towed over a long distance. be able to. Furthermore, when the double-walled cylindrical flat resin pipe 15 passes through the bellows pipe 14,
Since the contact area with the bellows tube 14 is small, the frictional force can be reduced, and an increase in traction resistance can be suppressed.

【0029】このようにして既設管3の全長にわたり扁
平樹脂パイプ15を挿入した後、導入ガイドホ−ス5と
蛇腹管14を取り外して、扁平樹脂パイプ15の端部を
拡張治具で拡張してから、扁平樹脂パイプ15の内部に
加熱加圧流体を供給するか、加熱流体を供給しながらピ
グなどの拡管具を移動させて軟化,膨張させ、既設管3
の内面に樹脂パイプ15を密着させる。この扁平樹脂パ
イプ15を軟化,膨張させるときに、扁平樹脂パイプ1
5の両端の空隙16が加熱流体の流路に利用され、扁平
樹脂パイプ15の膨張面より先の部分を予熱することが
できる。
After inserting the flat resin pipe 15 over the entire length of the existing pipe 3 in this way, the introduction guide hose 5 and the bellows tube 14 are removed, and the end of the flat resin pipe 15 is expanded using an expansion jig. Then, the existing pipe 3 is softened and expanded by supplying heated pressurized fluid to the inside of the flat resin pipe 15 or by moving a pipe expanding tool such as a pig while supplying the heated fluid.
The resin pipe 15 is brought into close contact with the inner surface. When softening and expanding this flat resin pipe 15, the flat resin pipe 1
The gaps 16 at both ends of the flat resin pipe 15 are used as a flow path for the heating fluid, and the portion beyond the expansion surface of the flat resin pipe 15 can be preheated.

【0030】なお、上記実施例は加熱流体発生装置11
で発生する加熱流体の循環系を加熱流体発生装置11,
加熱流体往路ホ−ス12,導入ガイドホ−ス5,加熱加
圧容器4,加熱流体復路ホ−ス13,加熱流体発生装置
11と形成した場合について説明したが、加熱流体発生
装置11から加熱蒸気を送るときには、図8に示すよう
に導入ガイドホ−ス5の先端部を開放状態にし、加熱流
体往路ホ−ス12を加熱流体発生装置11から導入ガイ
ドホ−ス5と加熱加圧容器4に接続しても良い。この場
合は、加熱蒸気を加熱流体往路ホ−ス12から導入ガイ
ドホ−ス5を通して加熱加圧容器4に送り、先端の開放
部から放出して導入ガイドホ−ス5と既設管3との間に
ある扁平樹脂パイプ15を加熱するとともに、加熱流体
往路ホ−ス12から加熱加圧容器4に加熱蒸気を送り加
熱加圧容器4の下部に設けたドレン管18から放出する
ようにして加熱加圧容器4内の扁平樹脂パイプ15を加
熱加圧する。このようにすることにより、既設管3内に
導入した扁平樹脂パイプ15の温度をより早く低くする
ことができ、蛇腹管14の長さを短くすることができる
[0030] In the above embodiment, the heated fluid generating device 11
The heating fluid generating device 11,
A case has been described in which the heating fluid outgoing hose 12, the introduction guide hose 5, the heated pressurized container 4, the heated fluid returning hose 13, and the heated fluid generator 11 are formed. When sending the fluid, the tip of the introduction guide hose 5 is opened as shown in FIG. You may do so. In this case, heated steam is sent from the heated fluid outbound hose 12 through the introduction guide hose 5 to the heated pressurized container 4, and is released from the open part at the tip to be placed between the introduction guide hose 5 and the existing pipe 3. While heating a certain flat resin pipe 15, heated steam is sent from the heated fluid outgoing hose 12 to the heated and pressurized container 4 and discharged from the drain pipe 18 provided at the bottom of the heated and pressurized container 4, thereby heating and pressurizing it. The flat resin pipe 15 inside the container 4 is heated and pressurized. By doing so, the temperature of the flat resin pipe 15 introduced into the existing pipe 3 can be lowered more quickly, and the length of the bellows pipe 14 can be shortened.

【0031】[0031]

【発明の効果】この発明は以上説明したように、既設管
内径と同径かやや小さい外径に成形して形状記憶した熱
可塑性樹脂パイプを断面積が小さくなるように扁平加工
した扁平樹脂パイプを、加熱流体を循環している導入ガ
イドホ−ス内を通して引出しながら加熱加圧容器の引出
口近傍で大きな曲率半径を有する凹凸一対の成形ロ−ラ
で管軸に沿って緩やかに曲げて予備成形することにより
、扁平樹脂パイプを既設管近傍まで撓んだり変形するこ
となしに移動させることができる。
Effects of the Invention As explained above, the present invention is a flat resin pipe which is obtained by flattening a thermoplastic resin pipe that has been shaped to have a shape memory by forming it to an outer diameter that is the same as or slightly smaller than the inner diameter of the existing pipe so that its cross-sectional area becomes smaller. The tube is drawn out through an introduction guide hose that circulates heated fluid, and is gently bent along the tube axis near the outlet of the heated and pressurized container with a pair of concave and convex forming rollers that have a large radius of curvature. By doing so, the flat resin pipe can be moved to the vicinity of the existing pipe without being bent or deformed.

【0032】また、既設管近傍まで引き降ろされた扁平
樹脂パイプを曲率半径が順次小さくなっている複数対の
成形ロ−ラで徐々に曲げ成形したのち複数対の成形ロ−
ラと直交する凹型ロ−ラで幅方向両端が近接するように
彎曲させて2重壁円筒状に成形するから、樹脂パイプに
無理な応力を加えることなしに彎曲することができ、内
しわや断面の変形等が生じることを防止することができ
る。
[0032] Furthermore, the flat resin pipe that has been pulled down to the vicinity of the existing pipe is gradually bent and formed by a plurality of pairs of forming rollers whose radius of curvature becomes smaller, and then a plurality of pairs of forming rollers are used.
Since the resin pipe is bent into a double-walled cylindrical shape by using a concave roller perpendicular to the roller so that both ends in the width direction are close together, it can be bent without applying excessive stress to the resin pipe, eliminating internal wrinkles. It is possible to prevent deformation of the cross section.

【0033】また2重壁円筒状に成形された樹脂パイプ
を既設管内に挿入するときに、2重壁円筒状に成形され
た樹脂パイプの外径より大きな内径を有する蛇腹管を既
設管口から一定長さ配設し、成形された樹脂パイプの外
径を蛇腹管の内壁で抑えながら既設管内に導入すること
により、成形時の残熱により樹脂パイプが形状を回復し
て外径が大きくなることを防ぐことができ、樹脂パイプ
を既設管内で牽引するときの抵抗を小さく抑えることが
できる。したがって長距離の施工を安定して行うことが
できる。
Furthermore, when inserting a double-walled cylindrical resin pipe into an existing pipe, a bellows pipe having an inner diameter larger than the outer diameter of the double-walled cylindrical resin pipe is inserted from the existing pipe opening. By introducing the molded resin pipe into the existing pipe while suppressing its outer diameter with the inner wall of the bellows pipe, the residual heat from molding will cause the resin pipe to recover its shape and increase its outer diameter. This makes it possible to reduce the resistance when pulling the resin pipe inside the existing pipe. Therefore, long-distance construction can be carried out stably.

【0034】また、樹脂パイプを施工場所に設置した導
入ガイドホ−ス内で2重壁円形形状に加工して既設管内
に導入するようにしたから、施工前の樹脂パイプはほぼ
平坦な形状でドラムに巻取ったり折りたたんで保管する
ことができる。このため、長さの長い樹脂パイプや厚い
樹脂パイプを小さな径で巻取ったりすることができ、長
距離の施工を行うことができると共に、樹脂パイプの保
管や施工時の運搬等の処理を容易に行うことができる。
[0034] Furthermore, since the resin pipe was processed into a double-walled circular shape in the introduction guide hose installed at the construction site and introduced into the existing pipe, the resin pipe before construction was almost flat and was not attached to the drum. It can be rolled up or folded for storage. Therefore, long or thick resin pipes can be rolled up into small diameter pipes, making it possible to perform long-distance construction, and making it easier to store and transport resin pipes during construction. can be done.

【図面の簡単な説明】[Brief explanation of drawings]

【図1】この発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the invention.

【図2】上部ガイドロ−ラを示す正面図である。FIG. 2 is a front view showing an upper guide roller.

【図3】下部ガイドロ−ラを示す正面図である。FIG. 3 is a front view showing the lower guide roller.

【図4】スクイズ成形ロ−ラを示す正面図である。FIG. 4 is a front view showing the squeeze forming roller.

【図5】凹型縦ロ−ラを示す正面図である。FIG. 5 is a front view showing a concave vertical roller.

【図6】樹脂パイプを示す斜視図である。FIG. 6 is a perspective view showing a resin pipe.

【図7】扁平樹脂パイプを示す斜視図である。FIG. 7 is a perspective view showing a flat resin pipe.

【図8】他の実施例を示す断面図である。FIG. 8 is a sectional view showing another embodiment.

【符号の説明】[Explanation of symbols]

1      導入装置 3      既設管 4      加熱加圧容器 5      導入ガイドホ−ス 6      上部ガイドロ−ラ 7      下部ガイドロ−ラ 8      スクイズ成形ロ−ラ 9      凹型縦ロ−ラ 14    蛇腹管 15    扁平樹脂パイプ 1 Introduction device 3. Existing pipes 4 Heated and pressurized container 5 Introduction guide hose 6 Upper guide roller 7 Lower guide roller 8 Squeeze molding roller 9 Concave vertical roller 14 Bellows tube 15 Flat resin pipe

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】  既設管内径と同径かやや小さい外径に
成形して形状記憶した熱可塑性樹脂パイプを断面積が小
さくなるように扁平加工し、該扁平樹脂パイプを案内し
て既設管内に導入する樹脂パイプ導入方法において、加
熱加圧容器から引出された扁平樹脂パイプを加熱加圧容
器の引出口近傍に設けられ、大きな曲率半径を有する凹
凸一対の成形ロ−ラで管軸に沿って緩やかに曲げ成形し
既設管近傍まで加熱加圧状態を保持しながら引き降ろし
、該扁平樹脂パイプの曲げを既設管口近傍に設けられ曲
率半径が順次小さくなっている複数対の成形ロ−ラで徐
々に大きくした後、複数対の成形ロ−ラの回転軸と直交
する回転軸を有する凹型ロ−ラで扁平樹脂パイプの幅方
向両端が近接するように彎曲に成形して既設管内に導入
することを特徴とする樹脂パイプ導入方法。
[Claim 1] A thermoplastic resin pipe that has been shaped to have an outer diameter that is the same as or slightly smaller than the inner diameter of the existing pipe and has a shape memory is flattened so that the cross-sectional area becomes smaller, and the flat resin pipe is guided and inserted into the existing pipe. In the resin pipe introduction method, a flat resin pipe pulled out from a heated and pressurized container is shaped along the tube axis by a pair of uneven forming rollers with a large radius of curvature, which are installed near the outlet of the heated and pressurized container. The flat resin pipe is gently bent and pulled down to the vicinity of the existing pipe while being heated and pressurized, and then the flat resin pipe is gradually bent using multiple pairs of forming rollers, which are installed near the mouth of the existing pipe and whose radius of curvature is gradually decreasing. After increasing the size, the flat resin pipe is formed into a curved shape using a concave roller having a rotation axis perpendicular to the rotation axis of the plurality of pairs of forming rollers so that both ends in the width direction are close to each other, and then introduced into the existing pipe. A resin pipe introduction method characterized by:
【請求項2】  彎曲に成形された樹脂パイプの外径よ
り大きな内径を有する蛇腹管を既設管口から一定長さ配
設し、彎曲に成形された樹脂パイプの外径を蛇腹管で抑
えながら樹脂パイプを既設管内に導入する請求項1記載
の樹脂パイプ導入方法。
[Claim 2] A bellows pipe having an inner diameter larger than the outer diameter of the curved resin pipe is installed for a certain length from the existing pipe port, and the outer diameter of the curved resin pipe is suppressed by the bellows pipe. The resin pipe introduction method according to claim 1, wherein the resin pipe is introduced into an existing pipe.
【請求項3】  既設管内径と同径かやや小さい外径に
成形して形状記憶した熱可塑性樹脂パイプを断面積が小
さくなるように扁平加工し、該扁平樹脂パイプを案内し
て既設管内に導入する樹脂パイプ導入装置において、扁
平樹脂パイプを収納した加熱加圧容器と既設管口間に取
り付けられ、加熱流体を供給しながら扁平樹脂パイプを
案内する導入ガイドホ−スと、該導入ガイドホ−ス内の
加熱加圧容器の引出口近傍に設けられ、大きな曲率半径
を有する凹凸一対の成形ロ−ラと、導入ガイドホ−ス内
の既設管口近傍に設けられ、上記成形ロ−ラの回転軸と
平行な回転軸を有し、曲率半径が順次小さくなっている
複数対の成形ロ−ラと、該成形ロ−ラの後段に配設され
複数対の成形ロ−ラの回転軸と直交する回転軸を有する
凹型ロ−ラとを備えたことを特徴とする樹脂パイプ導入
装置。
[Claim 3] A thermoplastic resin pipe that has been shaped to have an outer diameter that is the same as or slightly smaller than the inner diameter of the existing pipe and has a shape memory is flattened to have a smaller cross-sectional area, and the flat resin pipe is guided and inserted into the existing pipe. A resin pipe introduction device includes an introduction guide hose that is attached between a heated and pressurized container containing a flat resin pipe and an existing pipe port, and guides the flat resin pipe while supplying heating fluid, and the introduction guide hose. A pair of concave and convex forming rollers with a large radius of curvature are installed near the outlet of the heated and pressurized container inside the tube. a plurality of pairs of forming rollers having rotating axes parallel to each other and having successively smaller radii of curvature; A resin pipe introducing device comprising a concave roller having a rotating shaft.
JP3106546A 1991-04-12 1991-04-12 Resin pipe introduction method and resin pipe introduction device Expired - Lifetime JPH0717011B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3106546A JPH0717011B2 (en) 1991-04-12 1991-04-12 Resin pipe introduction method and resin pipe introduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3106546A JPH0717011B2 (en) 1991-04-12 1991-04-12 Resin pipe introduction method and resin pipe introduction device

Publications (2)

Publication Number Publication Date
JPH04314525A true JPH04314525A (en) 1992-11-05
JPH0717011B2 JPH0717011B2 (en) 1995-03-01

Family

ID=14436361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3106546A Expired - Lifetime JPH0717011B2 (en) 1991-04-12 1991-04-12 Resin pipe introduction method and resin pipe introduction device

Country Status (1)

Country Link
JP (1) JPH0717011B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019133A1 (en) * 1997-10-09 1999-04-22 Tokyo Gas Co., Ltd. Method of lining inner surface of conduit
JPH11115052A (en) * 1997-10-09 1999-04-27 Tokyo Gas Co Ltd Lining method of pipe conduit
JP2007260846A (en) * 2006-03-29 2007-10-11 Sekisui Chem Co Ltd Device for inserting lining pipe member into existing pipe
JP2014097610A (en) * 2012-11-14 2014-05-29 Ashimori Ind Co Ltd Installation method of lining material, and cylindrical body for installation of lining material
JP2014097611A (en) * 2012-11-14 2014-05-29 Ashimori Ind Co Ltd Installation method of lining material
JP2016163977A (en) * 2015-03-06 2016-09-08 大林道路株式会社 Feeding apparatus for regeneration lining material
AU2017225087B2 (en) * 2014-02-27 2019-04-18 Shell Internationale Research Maatschappij B.V. Method and system for lining a tubular

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936817U (en) * 1982-08-30 1984-03-08 トヨタ自動車株式会社 Diesel engine fuel filter device
KR101515934B1 (en) * 2014-11-13 2015-05-04 유라이닝(주) Apparatus for Softening and Keeping the Pipeline Repairing Reinforcement Tube and Non-Excavation Type Pipeline Reparing Method using the Same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6456531A (en) * 1987-07-27 1989-03-03 Pipe Liners Inc Method and device for manufacturing pipe liner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6456531A (en) * 1987-07-27 1989-03-03 Pipe Liners Inc Method and device for manufacturing pipe liner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019133A1 (en) * 1997-10-09 1999-04-22 Tokyo Gas Co., Ltd. Method of lining inner surface of conduit
JPH11115052A (en) * 1997-10-09 1999-04-27 Tokyo Gas Co Ltd Lining method of pipe conduit
US6241925B1 (en) * 1997-10-09 2001-06-05 Tokyo Gas Co., Ltd. Method of lining channels
JP2007260846A (en) * 2006-03-29 2007-10-11 Sekisui Chem Co Ltd Device for inserting lining pipe member into existing pipe
JP2014097610A (en) * 2012-11-14 2014-05-29 Ashimori Ind Co Ltd Installation method of lining material, and cylindrical body for installation of lining material
JP2014097611A (en) * 2012-11-14 2014-05-29 Ashimori Ind Co Ltd Installation method of lining material
AU2017225087B2 (en) * 2014-02-27 2019-04-18 Shell Internationale Research Maatschappij B.V. Method and system for lining a tubular
US10858918B2 (en) 2014-02-27 2020-12-08 Shell Oil Company Method and system for lining a tubular
JP2016163977A (en) * 2015-03-06 2016-09-08 大林道路株式会社 Feeding apparatus for regeneration lining material

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