JPH0584731B2 - - Google Patents
Info
- Publication number
- JPH0584731B2 JPH0584731B2 JP62133178A JP13317887A JPH0584731B2 JP H0584731 B2 JPH0584731 B2 JP H0584731B2 JP 62133178 A JP62133178 A JP 62133178A JP 13317887 A JP13317887 A JP 13317887A JP H0584731 B2 JPH0584731 B2 JP H0584731B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heating
- spiral
- pipe
- conduit
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 8
- 230000037303 wrinkles Effects 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は管路の内面ライニング工法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a method for lining the inner surface of a pipeline.
従来の技術とその問題点
従来管路の内面ライニング工法として、管内施
工機による塗材の吹付け工法、チユーブライニン
グ工法など種々の工法が提案されているが、従来
のライニング工法は、いずれも施工対象の管路の
始端側と終端側の２個所に作業口を必要とし、例
えば片側が本管につながつている分岐管や片側の
管口が足場のない高所の壁面に開口されている排
気管などの管路に対しては、適用できない難点が
あつた。この場合例えば、特開昭59−217083号公
報にみられるように、ライニング材として可撓性
螺旋管を用い、該螺旋管を、回転を与えながら管
路内に押し込むようにすれば、一方側の管口から
の作業で管路内に螺旋管からなるライニングを形
成することができるが、螺旋管からなるライニン
グは、内周面に螺旋ジワを有するためこれが管路
内流通流体の抵抗となり、好ましいものではなか
つた。また従来工法では螺旋管は構成要素として
コイルスプリングを含んでいるために螺旋ジワの
消去は困難であつた。Conventional techniques and their problems Various methods have been proposed as conventional methods for lining the inner surface of pipelines, such as spraying coating materials using pipe construction machines and tube lining methods, but none of the conventional lining methods Two work openings are required at the beginning and end of the target pipe, for example, a branch pipe where one side is connected to the main pipe, or an exhaust where one side of the pipe opening is opened on a wall at a high place where there is no scaffolding. There was a drawback that it could not be applied to conduits such as pipes. In this case, for example, as seen in Japanese Patent Application Laid-Open No. 59-217083, if a flexible spiral tube is used as the lining material and the spiral tube is pushed into the pipe while being rotated, one side A lining made of a spiral tube can be formed in a conduit by working from the pipe opening, but the lining made of a helical tube has spiral wrinkles on its inner peripheral surface, which act as resistance to the fluid flowing in the conduit. It wasn't a good thing. Furthermore, in conventional construction methods, it has been difficult to eliminate spiral wrinkles because the spiral tube includes a coil spring as a component.
本発明はこのような従来の問題点を一掃するこ
とを目的としてなされたものである。 The present invention has been made with the aim of eliminating such conventional problems.
問題点を解決するための手段
本発明は、
(i) 施工対象の管路の始端管口よりその内部に、
管路と略々同口径の可撓性合成樹脂製螺旋管
を、該螺旋管に回転を与えながら押込み挿入す
る工程、
(ii) 管路内に挿入された上記螺旋管の始端部内
に、ヒータと、さらに管軸方向に貫通する貫通
孔とを備えた加熱ピグを設置すると共に、螺旋
管の始端管口に蓋を施し密閉する工程、
(iii) 上記蓋と加熱ピグとの間の螺旋管内に加圧空
気を供給しつつ、該加圧空気の一部を上記ヒー
タにより加熱しつつ上記貫通孔を通じ加熱ピグ
より終端側の未処理螺旋管内に流出せしめるこ
とによつて未処理螺旋管を予備加熱する工程、
(iv) 上記予備加熱と加熱ピグによる直接加熱とに
より螺旋管を加熱軟化せしめつつ、該螺旋管内
で加熱ピグを始端から終端に向け強制的に移動
することによつて螺旋ジワを消去して行く工
程、
を含むことを特徴とする管路の内面ライニング工
法に係る。Means for Solving the Problems The present invention provides: (i) from the starting end of the pipe to be constructed, to the inside thereof;
(ii) inserting a heater into the starting end of the helical tube inserted into the conduit while rotating a flexible synthetic resin helical tube having approximately the same diameter as the conduit; and a step of installing a heating pig with a through hole penetrating in the tube axis direction, and sealing the starting end of the spiral tube with a lid, (iii) inside the spiral tube between the lid and the heating pig. While supplying pressurized air to the heater, a part of the pressurized air is heated by the heater and flows out from the heating pig into the untreated spiral tube on the terminal side through the through hole, thereby preparing the untreated spiral tube. heating step (iv) heating and softening the spiral tube by the above preheating and direct heating with the heating pig, and removing spiral wrinkles by forcibly moving the heating pig from the starting end to the ending end within the spiral tube; The present invention relates to a method for lining the inner surface of a conduit, which is characterized by including a step of erasing.
実施例
以下に本発明の一実施例を添附図面にもとづき
説明すると、次の通りである。Embodiment An embodiment of the present invention will be described below based on the accompanying drawings.
第１図は本発明工法における可撓性合成樹脂製
螺旋管１の管路ａ内への挿入工程の状況を示して
いる。螺旋管１は管路ａと略々同径であり、例え
ばポリ塩化ビニル、ポリエチレン、ポリプロピレ
ンなどのような熱可撓性合成樹脂から成形されて
いる。 FIG. 1 shows the process of inserting a flexible synthetic resin helical tube 1 into a conduit a in the construction method of the present invention. The spiral tube 1 has approximately the same diameter as the conduit a, and is molded from a thermoflexible synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, or the like.
螺旋管１を管路ａ内に挿入するに際しては、螺
旋管１に対し回転と押込み力が与えられる。螺旋
管１は回転を受けると管路ａ内面との摩擦で、ね
じ送りにみられるように管路ａ内を推進する傾向
となるので、このような回転と押込み操作を継続
することにより、管路ａの始端管口a1からの作業
でもつて、螺旋管１を管路ａの全長に亘り支障な
く挿入できる。また螺旋管１は螺旋形状と可撓性
により屈曲自在性を有しているので、管路ａが図
示のように曲管部a′を有しているような場合であ
つても、曲管部a′を容易に通過できる。 When inserting the helical tube 1 into the conduit a, rotation and pushing force are applied to the helical tube 1. When the spiral pipe 1 is rotated, it tends to be propelled through the pipe a due to friction with the inner surface of the pipe a, as seen in screw feeding, so by continuing this rotation and pushing operation, the pipe Even when working from the starting pipe port a1 of the pipe a, the spiral pipe 1 can be inserted over the entire length of the pipe a without any trouble. In addition, since the spiral pipe 1 has flexibility due to its spiral shape and flexibility, even if the pipe a has a bent pipe part a' as shown in the figure, the bent pipe It can easily pass through part a′.
螺旋管１を管路ａの全長に亘り挿入した後は、
第２図に示されるように、螺旋管１の始端部内
に、遠隔操作により管路ａ内を移動させる加熱ピ
グ２が設置されると共に始端管口１ａに蓋３が施
される。 After inserting the spiral tube 1 over the entire length of the conduit a,
As shown in FIG. 2, a heating pig 2 is installed in the starting end of the spiral tube 1 and is moved through the pipe a by remote control, and a lid 3 is placed on the starting end tube opening 1a.
加熱ピグ２は、例えば円錐状であつて、その最
大外径は、管路ａの内径よりも内面ライニング層
の厚し分だけ小さく、内部には螺旋管１を加熱軟
化するための電気ヒータ２ａが備えられている。。
またピグ２の後端には遠隔操作用のフレキシブル
ロツド２ｂが備えられ、該ロツド２ｂは蓋３をフ
リーに貫通して管外に引出されている。このロツ
ド２ｂ内には、電気ヒータ２ａを電源に接続する
ためのコード２a1が収納されている。ロツド２ｂ
には、管路ａ内での滑り性をよくするために耐熱
性にして滑性のよい、例えばポリ四フツ化エチレ
ンなどの合成樹脂被覆膜（図示せず）を形成する
ことができる。 The heating pig 2 has a conical shape, for example, and has a maximum outer diameter smaller than the inner diameter of the pipe a by the thickness of the inner lining layer, and has an electric heater 2a inside for heating and softening the spiral pipe 1. is provided. .
A flexible rod 2b for remote control is provided at the rear end of the pig 2, and the rod 2b freely passes through the lid 3 and is pulled out of the tube. A cord 2a1 for connecting the electric heater 2a to a power source is housed within the rod 2b. rod 2b
A synthetic resin coating film (not shown) made of polytetrafluoroethylene or the like, which is heat resistant and has good slip properties, can be formed on the pipe a to improve the slip properties within the pipe a.
第２図に示す状態で蓋３と加熱ピグ２との間の
管内空間４（第３図参照）内を、導管５を通じて
供給される加圧空気により加圧状態に保持しつ
つ、フレキシブルロツド２ｂによる回転と押込み
操作でもつて、加熱ピグ２を管内移動すると、加
熱ピグ２はこの管内移動につれ螺旋管２を加熱軟
化しつつ管半径方向に押圧して行く。よつて螺旋
管２は加熱ピグ２による加熱軟化と管半径方向へ
の押圧により管軸及び管半径方向に伸張され、螺
旋ジワが消去されて行く。従つて加熱ピグ２が通
過した後は、第３図に示されるように螺旋管１は
平滑管１′となつて管路ａに内張りされ、ここの
内張り状態は、管内空間４内の加圧により、その
まま保持される。 In the state shown in FIG. 2, the inside of the tube space 4 (see FIG. 3) between the lid 3 and the heating pig 2 is maintained in a pressurized state by pressurized air supplied through the conduit 5, and the flexible rod is When the heating pig 2 is moved within the tube by the rotation and pushing operation by the helical tube 2b, the heating pig 2 heats and softens the spiral tube 2 as it moves within the tube and presses it in the radial direction of the tube. Therefore, the spiral tube 2 is stretched in the tube axis and tube radial direction by heating and softening by the heating pig 2 and pressing in the tube radial direction, and the spiral wrinkles are eliminated. Therefore, after the heating pig 2 has passed, the spiral tube 1 becomes a smooth tube 1' and is lined in the conduit a, as shown in FIG. It is kept as is.
而して第４図に示されるように加熱ピグ２を管
路ａの終端まで移動させることにより、管路ａの
全長に亘つて、平滑管１′からなる内面ライニン
グを形成できる。 By moving the heating pig 2 to the end of the conduit a as shown in FIG. 4, an inner lining made of the smooth tube 1' can be formed over the entire length of the conduit a.
内面ライニングの形成後は、第５図に示される
ように上記ロツド２ｂ操作をして管内を逆走さ
せ、加熱ピグ２を回収することにより、内面ライ
ニングの全工程を終了し（第６図参照）次の操作
に備えぬことができる。走時に於ける加熱ピグ２
の加熱は、継続又は停止のいずれでもよく、加熱
を継続すれば逆走時を利用して、内面ライニング
層の表面を再度整形できる。 After forming the inner lining, as shown in Fig. 5, the rod 2b is operated to move backward through the pipe and the heating pig 2 is collected, thereby completing the entire process of forming the inner lining (see Fig. 6). ) You can prepare for the next operation. Heating pig during running 2
The heating may be continued or stopped; if the heating is continued, the surface of the inner lining layer can be shaped again by utilizing the reverse running time.
本発明工法においては、螺旋管１は回転下での
押込みが可能な程度の捩り剛性ひいては強度を有
し、螺旋ジワ消去後に於ても管路ａから独立して
保形性を有するが、場合によつては螺旋管１の外
周面に予めホツトメルト層（図示せず）を設けて
おき、このホツトメルト層を利用して平滑管１′
を管路ａ内面に接着固定するようにしてもよい。 In the construction method of the present invention, the spiral pipe 1 has torsional rigidity and strength to the extent that it can be pushed under rotation, and has shape retention independently from the pipe a even after the spiral wrinkles are eliminated. In some cases, a hot melt layer (not shown) is previously provided on the outer peripheral surface of the spiral tube 1, and this hot melt layer is used to form the smooth tube 1'.
may be adhesively fixed to the inner surface of the pipe a.
本発明工法に於て、ライニング材として用いる
螺旋管１は回転押込みにより管路ａ内に挿入され
るが、この挿入を可能にするためには、該螺旋管
１に付与した回転力が先端まで伝達されることが
必要であり、もし螺旋管１の途中で捩れが生ずる
と、それ以上の回転押込みはできなくなる。従つ
て螺旋管１としては途中で捩れを生ずる虞のない
捩れ剛性ひいては強度のあるものを使用すること
が必要であり、加熱ピグ２単独の加熱では加熱軟
化状態を得るまでに少し時間がかかる。 In the construction method of the present invention, the helical tube 1 used as the lining material is inserted into the conduit a by rotational pushing, but in order to make this insertion possible, the rotational force applied to the helical tube 1 must reach the tip. It is necessary for the rotation to be transmitted, and if a twist occurs in the middle of the spiral tube 1, further rotation and pushing will not be possible. Therefore, it is necessary to use a helical tube 1 that has torsional rigidity and strength without the risk of twisting in the middle, and it takes some time to obtain a softened state by heating the heating pig 2 alone.
本発明では、このような問題を解消するため
に、螺旋管１の予備加熱を行い得るような構成に
なつている。即ち管内空間４内に供給される加圧
空気を利用して螺旋管１を予備加熱するために、
加熱ピグ２には管軸方向に貫通する貫通孔２a2が
設けられている。このようにすれば、加圧空気は
上記貫通孔２a2内の通過中に加熱を受け熱風とな
つて、加熱ピグ２より終端側の未処理の螺旋管１
内に吹き出し、該螺旋管１を予備加熱する。螺旋
管１の予備加熱により加熱軟化までの時間を短縮
でき、加熱ピグ２の管内移動ひいては施工能率を
向上できる。 In order to solve this problem, the present invention has a structure in which the spiral tube 1 can be preheated. That is, in order to preheat the spiral tube 1 using pressurized air supplied into the tube interior space 4,
The heating pig 2 is provided with a through hole 2a 2 that penetrates in the tube axis direction. In this way, the pressurized air is heated while passing through the through hole 2a2 and becomes hot air, and the untreated spiral pipe 1 on the terminal side of the heating pig 2 is heated.
The spiral tube 1 is preheated. By preheating the helical pipe 1, the time required for heating and softening can be shortened, and the movement of the heating pig 2 within the pipe can be improved, as well as the construction efficiency.
効 果
本発明工法によれば、次の通りの優れた効果が
得られる。Effects According to the construction method of the present invention, the following excellent effects can be obtained.
○イ 管路の始端管口よりの作業のみによつて管路
の全長に亘り表面平滑な内面ライニングを形成
でき、通常の管路はもとより、片側からの施工
が要求されるような管路に対しても支障なく適
用できる。○B A smooth inner lining can be formed over the entire length of the pipeline by only working from the starting end of the pipeline, and can be used not only for normal pipelines but also for pipelines that require construction from one side. It can also be applied without any problem.
○ロ 加熱加圧空気による予備加熱と加熱ヒータに
よる直接的加熱を併用するので、螺旋管の加熱
軟化を速やかに行うことができ施工能率を向上
できる。○B Since preheating using heated pressurized air and direct heating using a heating heater are used together, the spiral pipe can be heated and softened quickly, and construction efficiency can be improved.
○ハ 予備加熱のための加熱源を、加圧空気と加熱
ピグに備えたヒータとにより作り出すことがで
きるので、特別な装置の設置や操作を必要とせ
ず、予備加熱の目的を装置面並びに操作面に於
て簡潔に達成できる。○C The heating source for preheating can be created using pressurized air and the heater installed in the heating pig, so there is no need to install or operate special equipment, and the purpose of preheating can be achieved by controlling the equipment surface and operation. This can be easily achieved in terms of aspects.
第１図乃至第６図は本発明工法を工程順に示す
説明図である。
図において、１は螺旋管、２は加熱ピグ、３は
蓋、４は管内空間である。
FIGS. 1 to 6 are explanatory diagrams showing the construction method of the present invention in the order of steps. In the figure, 1 is a spiral tube, 2 is a heating pig, 3 is a lid, and 4 is a space inside the tube.
Claims (1)
に、管路と略々同口径の可撓性合成樹脂製螺旋
管を、該螺旋管に回転を与えながら押込み挿入
する工程、 (ii) 管路内に挿入された上記螺旋管の始端部内
に、ヒータと、さらに管軸方向に貫通する貫通
孔とを備えた加熱ピグを設置すると共に、螺旋
管の始端管口に蓋を施し密閉する工程、 (iii) 上記蓋と加熱ピグとの間の螺旋管内に加圧空
気を供給しつつ、該加圧空気の一部を上記ヒー
タにより加熱しつつ上記貫通孔を通じ加熱ピグ
より終端側の未処理螺旋管内に流出せしめるこ
とによつて未処理螺旋管を予備加熱する工程、 (iv) 上記予備加熱と加熱ピグによる直接加熱とに
より螺旋管を加熱軟化せしめつつ、該螺旋管内
で加熱ピグを始端から終端に向け強制的に移動
することによつて螺旋ジワを消去して行く工
程、 とを含むことを特徴とする管路の内面ライニング
工法。[Claims] 1 (i) A flexible synthetic resin helical tube having approximately the same diameter as the conduit is placed inside the starting end of the conduit to be constructed while rotating the helical tube. (ii) installing a heating pig equipped with a heater and a through hole penetrating in the tube axis direction in the starting end of the spiral tube inserted into the conduit; (iii) supplying pressurized air into the spiral tube between the lid and the heating pig, and heating a portion of the pressurized air with the heater; (iv) heating and softening the spiral tube by the above preheating and direct heating by the heating pig; A method for lining an inner surface of a conduit, comprising the step of forcibly moving a heating pig from a starting end to a terminal end within the helical pipe to eliminate spiral wrinkles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133178A JPS63295237A (en) | 1987-05-27 | 1987-05-27 | Inner face lining process for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133178A JPS63295237A (en) | 1987-05-27 | 1987-05-27 | Inner face lining process for pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63295237A JPS63295237A (en) | 1988-12-01 |
| JPH0584731B2 true JPH0584731B2 (en) | 1993-12-03 |
Family
ID=15098504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133178A Granted JPS63295237A (en) | 1987-05-27 | 1987-05-27 | Inner face lining process for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63295237A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002036363A (en) * | 2000-07-27 | 2002-02-05 | Asahi Tec Corp | Method for repairing pipeline |
| KR100718247B1 (en) | 2006-03-17 | 2007-05-15 | 한국건설기술연구원 | Close-fit pipes lining system of trenchless technology using means for removing pleat and apparatus thereby |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432579A (en) * | 1977-08-18 | 1979-03-09 | Osaka Gas Co Ltd | Inner lining of conduit already constructed |
| JPS5443951A (en) * | 1977-09-13 | 1979-04-06 | Osaka Gas Co Ltd | Coating for inner surface of installed conduit |
| JPS59217083A (en) * | 1983-05-24 | 1984-12-07 | タイガ−スポリマ−株式会社 | Piping structure |
-
1987
- 1987-05-27 JP JP62133178A patent/JPS63295237A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432579A (en) * | 1977-08-18 | 1979-03-09 | Osaka Gas Co Ltd | Inner lining of conduit already constructed |
| JPS5443951A (en) * | 1977-09-13 | 1979-04-06 | Osaka Gas Co Ltd | Coating for inner surface of installed conduit |
| JPS59217083A (en) * | 1983-05-24 | 1984-12-07 | タイガ−スポリマ−株式会社 | Piping structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63295237A (en) | 1988-12-01 |
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