JPH0556252B2 - - Google Patents
Info
- Publication number
- JPH0556252B2 JPH0556252B2 JP62172536A JP17253687A JPH0556252B2 JP H0556252 B2 JPH0556252 B2 JP H0556252B2 JP 62172536 A JP62172536 A JP 62172536A JP 17253687 A JP17253687 A JP 17253687A JP H0556252 B2 JPH0556252 B2 JP H0556252B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- heating
- pig
- tube
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/63—Internally supporting the article during joining
- B29C66/632—Internally supporting the article during joining using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
- B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
- B29C65/203—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5227—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles
- B29C66/52271—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles one tubular article being placed inside the other
- B29C66/52272—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles one tubular article being placed inside the other concentrically, e.g. for forming multilayer tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は管路の内張り工法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a pipe lining method.
従来の技術とその問題点
従来管路の内張り工法として、管路内に該管路
より小口径の硬質乃至半硬質の熱可塑性プラスチ
ツク管を挿入した後、この管を加熱すると同時に
内部より圧力をかけて膨脹させ、管路内面に密着
被覆するような管路の内張り工法が提案されてい
る。Conventional technology and its problems The conventional method for lining pipes is to insert a hard or semi-hard thermoplastic tube with a smaller diameter into the pipe, then heat the pipe and simultaneously apply pressure from inside. A method of lining pipes has been proposed in which the inner surface of the pipe is closely coated by inflating the pipe.
ところが従来工法では、管路内挿入の管の加熱
を単に管内側から行なうにすぎないため、管の厚
み方向に於て加熱が不均一となり、特にこの傾向
は厚みが大きくなればなる程顕著となり、この加
熱の不均一は、膨脹不足を招き管路内面への密着
被覆ができなかつたり、或いは無理に膨脹すると
クラツクなどの発生を招くなどの問題があつた。 However, in the conventional method, the heating of the pipe inserted into the pipe is simply carried out from the inside of the pipe, so the heating becomes uneven in the thickness direction of the pipe, and this tendency becomes more pronounced as the thickness increases. This non-uniform heating causes problems such as insufficient expansion, which makes it impossible to tightly coat the inner surface of the pipe, and excessive expansion, which causes cracks.
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、管路内に該管路より小口径の硬質乃
至半硬質の熱可塑性プラスチツク管を挿入した
後、この管を加熱すると同時に内圧をかけて膨脹
させ管路内面に密着被覆する管路の内張り工法に
置いて、上記管の外側にその外周面に接触するよ
うに筒状ヒータを設置し、該筒状ヒータによる管
外側からの加熱と、常法による管内側からの加熱
加圧を同時に行ないながら、上記管の膨脹ひいて
は管路内面への密着被覆を行なうことを特徴とす
る管路の内張り工法に係る。Means for Solving the Problems The present invention involves inserting a hard or semi-hard thermoplastic tube with a small diameter into a conduit, heating the tube, and simultaneously applying internal pressure to expand the tube. In the pipe lining method, which tightly covers the inner surface of the pipe, a cylindrical heater is installed on the outside of the pipe so as to be in contact with the outer circumferential surface of the pipe, and heating from the outside of the pipe by the cylindrical heater and a conventional method are used. The present invention relates to a pipe lining method characterized in that the pipe is expanded and the inner surface of the pipe is closely coated while heating and pressurizing the pipe from inside the pipe.
実施例
以下に本発明の各種実施例を添付図面にもとづ
き説明すると次の通りである。Embodiments Various embodiments of the present invention will be described below with reference to the accompanying drawings.
本発明工法の実施に際しては、第１図に示され
るように常法に従い管路ａ内に小口径のプラスチ
ツク管１を挿入した後、その始端部を適宜の手段
を適用して拡径し、この拡径部１ａ内に電気加熱
式の加熱ピグ２を設置し、該ピグ２の後端に付設
されたコード３入りの牽引ロープ４は上記管１内
を通つて管路ａの終端外方へ引出し、コード３は
電源に接続する。更に上記管１の始端側の外側に
電気加熱式の筒状ヒータ５を嵌装設置し、該ヒー
タ５の後端に等間隔複数個所に付設された複数本
の牽引ロープ６…は、上記管路ａ内を等つて管路
ａの終端外方へ引出し、該ロープ６の一本に挿通
保持されたコード７は電源（図示せず）に接続す
る。更に上記管１の始端部の拡径部１ａの入口部
に蓋８を施し、該蓋８に形成された供給口８ａ及
び該口８ａに接続する導管９を介して上記拡径部
１ａ内をボイラー又はコンプレツサーなどの加圧
流体供給部１０に連絡する。 When carrying out the construction method of the present invention, as shown in FIG. 1, a small-diameter plastic pipe 1 is inserted into the pipe a according to a conventional method, and then the starting end is expanded in diameter by applying appropriate means. An electrically heated heating pig 2 is installed in this enlarged diameter portion 1a, and a pulling rope 4 containing a cord 3 attached to the rear end of the pig 2 passes through the pipe 1 to the outer end of the pipe a. and connect cord 3 to the power source. Further, an electrically heated cylindrical heater 5 is fitted and installed on the outside of the starting end side of the pipe 1, and a plurality of traction ropes 6 attached to the rear end of the heater 5 at a plurality of locations at equal intervals are connected to the pipe 1. The cord 7, which is passed through the rope 6 and held by one of the ropes 6, is connected to a power source (not shown). Furthermore, a lid 8 is provided on the inlet of the enlarged diameter portion 1a at the starting end of the pipe 1, and the inside of the enlarged diameter portion 1a is supplied through a supply port 8a formed in the lid 8 and a conduit 9 connected to the port 8a. Connects to a pressurized fluid supply 10, such as a boiler or compressor.
第１図に示す状態で、加熱ピグ２及び筒状ヒー
タ５によりプラスチツク管１を加熱すると、該管
１は内外からの加熱により、管厚み方向に均一に
加熱されることになり、仮に管の厚みが比較的大
きい場合、例えば１〜15mm程度の肉厚を有するよ
うな場合であつても、全体を均一に加熱軟化でき
る。尚加熱ピグ２及び筒状ヒータ５によるプラス
チツク管１の加熱は、常法通り軟化点以上、融点
以下の温度で行われる。 When the plastic tube 1 is heated by the heating pig 2 and the cylindrical heater 5 in the state shown in FIG. Even when the thickness is relatively large, for example, about 1 to 15 mm, the whole can be uniformly heated and softened. The heating of the plastic tube 1 by the heating pig 2 and the cylindrical heater 5 is carried out at a temperature above the softening point and below the melting point as usual.
而して、加熱ピグ２及び筒状ヒータ５によるプ
ラスチツク管１の内外より加熱を継続しつつ、ま
た供給部１０により上記管１の拡径部１ａ内に加
圧流体を供給して拡径部１ａ内を所定圧力例えば
0.3Kg／cm2〜３Kg／cm2程度の圧力に保持しつつ上
記ピグ２及び筒状ヒータ５を管路終端方向に向け
て移動して行くと、プラスチツク管１は加熱ピグ
２の移動につれて拡張されると同時に管内圧力を
受けて膨脹され、この膨脹はプラスチツク管１が
内外より加熱により管厚みの方向に均一に加熱軟
化されているので、クラツクなどの発生なしに充
分確実に行われ、膨脹されたプラスチツク管１は
第２図に示されるように膨脹管１′となつて管路
ａ内面に密着被覆される。尚加熱ピグ２の外径
は、プラスチツク管１の内径以上で且つ膨脹管
１′の内径以下であればよく、また形状は円、楕
円など任意であり、特に図示のような円錐形がプ
ラスチツク管１との広い接触面が得られるので適
当である。また筒状ヒータ５の外径は上記加熱ピ
グ２の外径と同程度であり、内径はプラスチツク
管１の外径と略々等しく、内空部５ａはラツパ状
に拡径されて、円錐形加熱ピグ２と嵌合し得るよ
うになつていることが好ましい。加熱ピグ２と筒
状ヒータ５は同時に等速で管路ａ内を移動させる
ことが好ましく、このような同時等速移動は、例
えば筒状ヒータ５を加熱ピグ２の移動に随伴させ
ることによつて得られる。その他牽引ロープ４，
６の牽引速度を等しくしてもよく、この場合は加
熱ピグ２及び筒状ヒータ５に磁気センサ（図示せ
ず）などの近接スイツチを備え、位置確認できる
ような構成にしておくことが好ましい。 While the heating pig 2 and the cylindrical heater 5 continue to heat the plastic tube 1 from the inside and outside, the supply section 10 supplies pressurized fluid into the enlarged diameter section 1a of the tube 1 to cool the enlarged diameter section. 1a at a predetermined pressure, e.g.
When the pig 2 and the cylindrical heater 5 are moved toward the end of the pipe while maintaining a pressure of about 0.3 Kg/cm 2 to 3 Kg/cm 2 , the plastic pipe 1 expands as the heating pig 2 moves. At the same time, the plastic tube 1 is expanded by the pressure inside the tube, and this expansion is carried out reliably without any cracks because the plastic tube 1 is heated from the inside and outside and is uniformly softened in the direction of the tube thickness. The plastic tube 1 thus formed becomes an expansion tube 1', as shown in FIG. 2, and is tightly coated on the inner surface of the conduit a. The outer diameter of the heating pig 2 may be greater than or equal to the inner diameter of the plastic tube 1 and less than or equal to the inner diameter of the expansion tube 1', and the shape may be any shape such as a circle or an ellipse. This is suitable because a wide contact surface with 1 can be obtained. Further, the outer diameter of the cylindrical heater 5 is approximately the same as the outer diameter of the heating pig 2, the inner diameter is approximately equal to the outer diameter of the plastic tube 1, and the inner space 5a is expanded into a conical shape. Preferably, it is adapted to fit with the heating pig 2. It is preferable that the heating pig 2 and the cylindrical heater 5 are simultaneously moved at a constant speed in the pipe a. Such simultaneous uniform movement can be achieved, for example, by making the cylindrical heater 5 accompany the movement of the heating pig 2. You can get it. Other tow rope 4,
In this case, it is preferable that the heating pig 2 and the cylindrical heater 5 be equipped with a proximity switch such as a magnetic sensor (not shown) so that their positions can be confirmed.
第３図は加熱ピグ２として電気加熱式に代えス
チーム加熱式のものを用いた場合の一例を示し、
この場合加熱ピグ２は、大径ピグ２ａ、小径ピグ
２ｂ及びこれらピグ２ａ，２ｂを連結する中間軸
２ｃから構成され、大径ピグ２ａに形成された貫
通孔１１より大小ピグ２ａ，２ｂ間の空間部２ｄ
に流入する、管加圧膨脹用のスチームが加熱源と
して利用されるようになつており、空間部２ｄ内
のスチームの一部を小径ピグ２ｂの貫通孔１２よ
り噴出するようにすれば膨脹前のプラスチツク管
１を予備加熱できる。大径ピグ２ａの外径は、膨
脹管１′の内径と略々等しいかこれより僅かに小
さく、また小径ピグ２ｂの外径は、プラスチツク
管１の内径と略々等しいかこれにより僅かに大き
い。 Figure 3 shows an example in which a steam heating type is used instead of an electric heating type as the heating pig 2.
In this case, the heating pig 2 is composed of a large-diameter pig 2a, a small-diameter pig 2b, and an intermediate shaft 2c that connects these pigs 2a, 2b. Space part 2d
The steam flowing into the tube for pressurized expansion is used as a heating source, and if a part of the steam in the space 2d is ejected from the through hole 12 of the small diameter pig 2b, the steam before expansion can be used as a heating source. plastic tube 1 can be preheated. The outer diameter of the large diameter pig 2a is approximately equal to or slightly smaller than the inner diameter of the expansion tube 1', and the outer diameter of the small diameter pig 2b is approximately equal to or slightly larger than the inner diameter of the plastic tube 1. .
本発明工法に於ては、第４図に示されるように
加熱ピグ２の使用を省略し、管膨脹用に使用され
る加圧流体を利用して、管内側からの加熱を行な
うようにしてもよい。この場合加圧流体としては
熱流体例えばスチームが用いられ、プラスチツク
管１の後端には、管内を所定圧に保持するために
栓１３が施され、該栓１３に形成された排出孔１
４よりの排出量を、その排出管１５に備えたバル
ブ１６の開閉操作により適宜調整することによ
り、管１，１′内を所定圧に保持できるようにな
つている。 In the construction method of the present invention, as shown in Fig. 4, the use of the heating pig 2 is omitted, and the pressurized fluid used for expanding the tube is used to heat the tube from the inside. Good too. In this case, a hot fluid such as steam is used as the pressurized fluid, and a plug 13 is provided at the rear end of the plastic tube 1 to maintain the inside of the tube at a predetermined pressure.
By appropriately adjusting the amount of discharge from the discharge pipe 15 by opening and closing a valve 16 provided in the discharge pipe 15, the inside of the pipes 1 and 1' can be maintained at a predetermined pressure.
効 果
本発明工法に於ては、管路内挿入のプラスチツ
ク管を加圧膨脹するに際し、該管を内外から加熱
するので管厚みの方向の加熱軟化が各部均一とな
り、管の加圧膨脹をスムーズに無理なく行い得ら
れ、特にプラスチツク管として肉厚のものを用い
る場合に適用して極めて有用である。Effects In the construction method of the present invention, when pressurizing and expanding a plastic tube inserted into a conduit, the tube is heated from the inside and outside, so that heating softening in the direction of the tube thickness is uniform in all parts, and the pressure expansion of the tube is prevented. It can be carried out smoothly and without difficulty, and is extremely useful especially when using thick-walled plastic pipes.
第１〜２図は本発明工法の一実施例状況を工程
順に示す全体概略説明図、第３図及び第４図は本
発明工法の他の実施状況をそれぞれ示す要部拡大
断面図である。
図において、１は硬質乃至半硬質のプラスチツ
ク管、２は加熱ピグ、３はコード、４は牽引ロー
プ、５は筒状ヒータ、６は牽引ロープ、７はコー
ド、８は蓋、９は導管、１０は加圧流体供給部で
ある。
1 and 2 are overall schematic explanatory diagrams showing one embodiment of the construction method of the present invention in the order of steps, and FIGS. 3 and 4 are enlarged sectional views of essential parts showing other implementation states of the construction method of the present invention, respectively. In the figure, 1 is a hard or semi-hard plastic tube, 2 is a heating pig, 3 is a cord, 4 is a traction rope, 5 is a cylindrical heater, 6 is a traction rope, 7 is a cord, 8 is a lid, 9 is a conduit, 10 is a pressurized fluid supply section.
Claims (1)
の熱可塑性プラスチツク管を挿入した後、この管
を加熱すると同時に内圧をかけて膨脹させ管路内
面に密着被覆する管路の内張り工法に於て、上記
管の外側にその外周面に接触するように筒状ヒー
タを設置し、該筒状ヒータによる管外側からの加
熱と、常法による管内側からの加熱加圧を同時に
行ないながら、上記管の膨脹ひいては管路内面へ
の密着被覆を行なうことを特徴とする管路の内張
り工法。1. A pipe lining method in which a hard or semi-rigid thermoplastic pipe with a small diameter is inserted into the pipe, and then the pipe is heated and at the same time internal pressure is applied to expand it and tightly coat the inner surface of the pipe. In this case, a cylindrical heater is installed on the outside of the tube so as to be in contact with the outer circumferential surface of the tube, and while heating from the outside of the tube by the cylindrical heater and heating and pressurizing from the inside of the tube using a conventional method, A method for lining pipes, characterized in that the pipe is expanded and the inner surface of the pipe is closely coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62172536A JPS6416632A (en) | 1987-07-09 | 1987-07-09 | Lining technique for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62172536A JPS6416632A (en) | 1987-07-09 | 1987-07-09 | Lining technique for pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6416632A JPS6416632A (en) | 1989-01-20 |
| JPH0556252B2 true JPH0556252B2 (en) | 1993-08-19 |
Family
ID=15943718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62172536A Granted JPS6416632A (en) | 1987-07-09 | 1987-07-09 | Lining technique for pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6416632A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9425503D0 (en) * | 1994-12-17 | 1995-02-15 | Wood John | Method and apparatus for re-sizing thermoplastic pipes |
| GB0022921D0 (en) * | 2000-09-19 | 2000-11-01 | Sev Trent Water Ltd | Lining ducts |
| JP2006046591A (en) * | 2004-08-06 | 2006-02-16 | Sekisui Chem Co Ltd | Water-stop method for mounting pipe opening and diameter-expanding member used in the method |
-
1987
- 1987-07-09 JP JP62172536A patent/JPS6416632A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6416632A (en) | 1989-01-20 |
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