JP2010201891A - Method for repairing double tube - Google Patents

Method for repairing double tube Download PDF

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JP2010201891A
JP2010201891A JP2009052900A JP2009052900A JP2010201891A JP 2010201891 A JP2010201891 A JP 2010201891A JP 2009052900 A JP2009052900 A JP 2009052900A JP 2009052900 A JP2009052900 A JP 2009052900A JP 2010201891 A JP2010201891 A JP 2010201891A
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tube
pipe
space
inner tube
double
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JP5364400B2 (en
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Atsuo Shimizu
敦夫 清水
Tsugushi Kato
貢嗣 加藤
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Inoac Tokuzai KK
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Inoac Tokuzai KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for repairing a double tube by which it is unnecessary to excavate an outer tube such as a concrete tube and breakage of an inner tube such as a steel tube hardly occurs when repairing and repairing cost can be suppressed. <P>SOLUTION: The double tube 10 has a space 15 between the outer tube 11 such as the concrete tube and the inner tube 13 such as the steel tube and a tube 31 is inserted in the inner tube 13. Gas is force-injected in the tube 31 to expand the tube 31 and to thereby bring the tube 31 into contact with an inner surface of the inner tube 13. A polyurethane raw material P is injected into the space 15 between the outer tube 11 and the inner tube 13 while supporting the inner tube 13 by the expanded tube 31 from the inside and the polyurethane raw material P is foamed. After the space 15 between the outer tube 11 and the inner tube 13 is filled up with a foamed polyurethane resin, the gas is extracted from the tube 31 and the tube 31 is pulled out of the inner tube 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、二重管の外管と内管間の空間にポリウレタン樹脂を充填する二重管の補修方法に関する。   The present invention relates to a method for repairing a double pipe in which a space between an outer pipe and an inner pipe of the double pipe is filled with polyurethane resin.

コンクリート管等の外管の内部に鋼管等の内管が挿入され、外管と内管間に空間を有する二重管は、例えば大型プラントへの海水給水管として土中に埋設されて使用されている。このように使用される二重管は、長期使用により外管が老朽化して土の重みで破損するおそれがあり、また、内管についても腐食が進行して穴があくことがあるため、補修が必要になる。   An inner pipe such as a steel pipe is inserted inside an outer pipe such as a concrete pipe, and a double pipe having a space between the outer pipe and the inner pipe is buried in the soil and used as a seawater supply pipe for a large plant, for example. ing. Double pipes used in this way may be damaged by the weight of the soil due to aging of the outer pipe due to long-term use, and the inner pipe may also be corroded, resulting in holes. Is required.

二重管の補修方法としては、土を掘り起こし、周囲の土砂を取り除き、外管および内管を交換する方法がある。また、内管の内側をクリーニングし、エポキシ樹脂などで内管内面をコーティングした後に外管と内管間の空間にポリウレタン原料を吐出して発泡させることによりポリウレタン樹脂を形成し、このポリウレタン樹脂で外管と内管間の空間を充填する方法がある。   As a method of repairing the double pipe, there is a method of excavating soil, removing surrounding earth and sand, and exchanging the outer pipe and the inner pipe. Also, after cleaning the inside of the inner tube, coating the inner surface of the inner tube with an epoxy resin, etc., a polyurethane material is formed by discharging and foaming polyurethane material into the space between the outer tube and the inner tube. There is a method of filling the space between the outer tube and the inner tube.

しかし、前者の方法は、外管を開削しなければならず、補修に膨大な費用がかかる問題がある。しかも、海岸堤防で、外管が海岸線の下を通過する場合、安全上の理由から開削が行われることはない。
一方、後者の方法は、樹脂のコーティングによる内管の補強では補強強度がそれほど高くないため、ポリウレタン原料の発泡圧で内管が変形あるいは破損するおそれがある。しかも、内管の破損した箇所からポリウレタン原料が内管内に侵入して発泡するようなことがあると、内管内の海水等の流れを阻害するおそれがある。 However, the former method has a problem that the outer pipe must be cut, and the repair is expensive. Moreover, when the outer pipe passes under the coastline on the coastal dike, excavation is not performed for safety reasons.
On the other hand, in the latter method, since the reinforcement strength is not so high when the inner tube is reinforced by resin coating, the inner tube may be deformed or broken by the foaming pressure of the polyurethane raw material. Moreover, if the polyurethane raw material enters the inner pipe from the damaged part of the inner pipe and foams, the flow of seawater or the like in the inner pipe may be hindered.

特開平２００１−４０９０号公報JP-A-2001-4090

本発明は前記の点に鑑みなされたものであって、外管を開削する必要がなく、かつ補修時に内管の破損を生じ難く、しかも費用を抑えることができる二重管の補修方法の提供を目的とする。   The present invention has been made in view of the above points, and provides a method of repairing a double pipe that does not require excavation of the outer pipe, is less likely to cause damage to the inner pipe during repair, and can reduce costs. With the goal.

請求項１の発明は、外管と内管間に空間を有する二重管の補修方法において、前記内管内に挿入したチューブに気体を圧入して前記チューブを膨張させることにより前記内管の内面に当接させ、前記膨張したチューブで前記内管を内側から支持しながら前記外管と前記内管間の空間にポリウレタン原料を吐出して発泡させ、前記発泡したポリウレタン樹脂で前記外管と前記内管間の空間を充填する二重管の補修方法に係る。さらに、前記チューブから気体を抜き、前記チューブを前記内管から抜き取ることが、現状を復帰させる意味で好ましい。しかし、場合によっては、チューブを内管に放置してもよい。なお、チューブの先端を破いて貫通させるのがより好ましい。   The invention of claim 1 is a method of repairing a double pipe having a space between an outer pipe and an inner pipe, and by injecting gas into the tube inserted into the inner pipe and expanding the tube, the inner surface of the inner pipe The polyurethane raw material is discharged and foamed into the space between the outer tube and the inner tube while the inner tube is supported from the inside by the expanded tube, and the outer tube and the It relates to the repair method of the double pipe that fills the space between the inner pipes. Furthermore, it is preferable to extract gas from the tube and extract the tube from the inner tube in order to restore the current state. However, in some cases, the tube may be left in the inner tube. In addition, it is more preferable to tear and penetrate the tip of the tube.

請求項２の発明は、請求項１において、前記チューブが一端で閉じ他端で開口したものからなり、加圧ケース内の回転軸に前記チューブを閉じた一端側から巻き取り、前記加圧ケースに形成されているチューブ送り出し用開口部に前記チューブの開口端の周縁を固定し、前記チューブ送り出し用開口部を前記チューブの開口端側で塞いだ状態とし、前記加圧ケース内に加圧気体を吹き込むことにより、前記チューブ送り出し用開口部から前記チューブを内外反転させ、かつ膨張させながら前記内管内に送り出して前記チューブを前記内管内に挿入すると共に、前記内管の内面に当接させることを特徴とする。   A second aspect of the present invention is the pressure case according to the first aspect, wherein the tube is closed at one end and opened at the other end, and wound around the rotating shaft in the pressure case from the one end side where the tube is closed. The tube delivery opening formed in the tube is fixed at the periphery of the opening end of the tube, the tube delivery opening is closed on the opening end side of the tube, and the pressurized gas is put into the pressurized case. The tube is reversed from the inside to the outside through the tube delivery opening, and the tube is fed into the inner tube while being expanded, and the tube is inserted into the inner tube and brought into contact with the inner surface of the inner tube. It is characterized by.

請求項１の発明によれば、内管内のチューブに圧入した気体により内管を内側から支持しながら外管と内管間の空間でポリウレタン原料を発泡させるため、発泡圧で内管が破損するのを防ぐことができる。しかも、外管を開削する必要がないため、補修作業が容易であり補修費用を抑えることができる。   According to the first aspect of the present invention, since the polyurethane raw material is foamed in the space between the outer tube and the inner tube while the inner tube is supported from the inside by the gas pressed into the tube in the inner tube, the inner tube is damaged by the foaming pressure. Can be prevented. In addition, since it is not necessary to open the outer tube, the repair work is easy and the repair cost can be reduced.

請求項２の発明によれば、チューブを内外反転させ、かつ膨張させながら内管内に送り出してチューブを内管内に挿入すると共に内管の内面に当接させるため、二重管が長い場合にもチューブを内管の奥まで容易に挿入することができる。   According to the second aspect of the present invention, the tube is reversed inside and outside and expanded and sent into the inner tube to insert the tube into the inner tube and contact the inner surface of the inner tube. The tube can be easily inserted into the inner tube.

チューブを内管内に挿入して膨張させる際の第１概略断面図である。It is a 1st schematic sectional drawing at the time of inserting and expanding a tube in an inner tube. チューブを内管内に挿入して膨張させる際の第２概略断面図である。It is a 2nd schematic sectional drawing at the time of inserting and expanding a tube in an inner tube. ポリウレタン原料を吐出して発泡させる際を示す概略拡大断面図である。It is a general | schematic expanded sectional view which shows the time of discharging and foaming a polyurethane raw material. チューブを内管から抜き取る際の概略拡大断面図である。It is a general | schematic expanded sectional view at the time of extracting a tube from an inner tube | pipe. チューブの概略図である。It is the schematic of a tube. チューブ反転送り出し装置の概略断面図である。It is a schematic sectional drawing of a tube inversion delivery apparatus.

以下、本発明の二重管の補修方法について、図面を用いて説明する。図１及び図２に示すように、まず二重管１０の内管１３内にチューブ反転送り出し装置５０によってチューブ３１を挿入する。その際、前記チューブ３１に圧入した気体によりチューブ３１を膨張させて内管１３の内面に当接させ、前記内管１３を内側から支持する。前記二重管１０は、外管１１がコンクリート管等からなり、一方、前記内管１３が鋼管等からなり、前記外管１１と内管１３の間に空間１５が形成されている。前記二重管１０の寸法は、例えば外管１１の内径が８００ｍｍ、内管１３の内径が５００ｍｍの場合を挙げる。   Hereinafter, the repair method of the double pipe of this invention is demonstrated using drawing. As shown in FIGS. 1 and 2, first, the tube 31 is inserted into the inner tube 13 of the double tube 10 by the tube reverse feeding device 50. At that time, the tube 31 is expanded by the gas press-fitted into the tube 31 and brought into contact with the inner surface of the inner tube 13 to support the inner tube 13 from the inside. In the double pipe 10, the outer pipe 11 is made of a concrete pipe or the like, while the inner pipe 13 is made of a steel pipe or the like, and a space 15 is formed between the outer pipe 11 and the inner pipe 13. The dimensions of the double tube 10 are, for example, the case where the outer tube 11 has an inner diameter of 800 mm and the inner tube 13 has an inner diameter of 500 mm.

前記チューブ３１は、図５に示すように一端３３が閉じ、他端３５が開口したものからなる。前記チューブ３１は二重管１０の補修範囲の長さに対応する長さを有し、且つ膨張した際の径が前記二重管１０の内管１３の内径と対応するものからなる。前記チューブ３１の材質は、チューブ３１内に気体を圧入することによりチューブ３１が膨張可能な伸縮性を有する材質、例えばゴム等からなり、エア圧０．６〜０．８ＭＰａに耐えることができ、且つ、耐熱温度が１５０℃以上のものが好ましい。前記チューブ３１は、図６に示すように、チューブ反転送り出し装置５０の加圧ケース５１内に収容されている。   As shown in FIG. 5, the tube 31 has one end 33 closed and the other end 35 opened. The tube 31 has a length corresponding to the length of the repair range of the double pipe 10, and the diameter when expanded corresponds to the inner diameter of the inner pipe 13 of the double pipe 10. The material of the tube 31 is made of a stretchable material that can expand the tube 31 by press-fitting gas into the tube 31, such as rubber, and can withstand an air pressure of 0.6 to 0.8 MPa. And the thing whose heat-resistant temperature is 150 degreeC or more is preferable. As shown in FIG. 6, the tube 31 is accommodated in a pressure case 51 of a tube reversing delivery device 50.

前記チューブ反転送り出し装置５０の加圧ケース５１は、内部に回転軸（回転ドラムとも称される）５３が設けられ、壁面５５には気体圧入口５７とチューブ送り出し用開口部５９が形成されている。前記回転軸５３には前記チューブ３１が閉じた一端３３側から巻き取られている。前記気体圧入口５７から送り込まれる気体が、加圧ケース５１に充満し、さらに加圧されると、チューブ送り出し用開口部５９から排出され、これに伴い前記チューブ３１は、反転しながら開口端３５側へ引っ張られ、前記回転軸５３も回転し、チューブ３１は、反転した状態で送り出される。これによってチューブ３１はチューブ送り出し用開口部５９から反転しながら全長送り出される。前記気体圧入口５７には、図示しない気体供給装置（エアコンプレッサー等）が接続される。また、前記チューブ送り出し用開口部５９は、前記二重管１０における内管１３の径より小さな穴形状で形成されている。前記チューブ送り出し用開口部５９には前記チューブ３１の開口端３５周縁を拡径するようにして固定され、前記チューブの開口端３５側で前記チューブ送り出し用開口部５９が塞がれている。なお、前記チューブ反転送り出し装置５０は、管内ライニング工法等として多用されているものであり（特開２００９４５２１号公報、実開平１−１０８７１９号公報等参照）、周知の構成である。   The pressurizing case 51 of the tube reversing delivery device 50 is provided with a rotating shaft (also called a rotating drum) 53 inside, and a gas pressure inlet 57 and a tube delivery opening 59 are formed on the wall surface 55. . The tube 31 is wound around the rotating shaft 53 from the closed end 33 side. When the gas supplied from the gas pressure inlet 57 fills the pressurizing case 51 and is further pressurized, the gas is discharged from the tube feed opening 59, and the tube 31 is inverted while the opening end 35 is reversed. Pulled to the side, the rotary shaft 53 also rotates, and the tube 31 is sent out in an inverted state. As a result, the tube 31 is fed out from the tube feed opening 59 while being reversed. A gas supply device (such as an air compressor) (not shown) is connected to the gas pressure inlet 57. The tube feed opening 59 is formed in a hole shape smaller than the diameter of the inner tube 13 in the double tube 10. The tube delivery opening 59 is fixed so that the periphery of the opening end 35 of the tube 31 is enlarged, and the tube delivery opening 59 is closed on the opening end 35 side of the tube. The tube reversal delivery device 50 is widely used as an in-tube lining method or the like (see Japanese Patent Laid-Open No. 20094521, Japanese Utility Model Laid-Open No. 1-108719, etc.) and has a well-known configuration.

前記チューブ送り出し用開口部５９を、図１の（１−Ａ）のように、前記二重管１０の一端の内管１３内へ向けて位置させ、前記気体圧入口５７から加圧ケース５１内に加圧気体（圧搾空気等）を圧入する。前記加圧ケース５１内への気体の圧入によって、図１の（１−Ｂ）のように、前記チューブ送り出し用開口部５９では前記チューブ３１の開口端３５の付近が外方（送り出し方向、すなわち二重管１０の内管１３内方）へ押圧されてチューブ３１の内外面が反転し、反転したチューブ３１内に前記加圧ケース５１から気体が圧入されることにより、図１の（１−Ｃ）、図２の（２−Ａ）及び（２−Ｂ）のように、前記回転軸５３からチューブ３１が送り出されて内管１３の奥まで挿入される。その際、前記チューブ３１は、チューブ３１内に圧入された気体により膨張（拡径）して前記内管１３の内面に当接しながら内管１３の奥まで挿入される。   The tube delivery opening 59 is positioned toward the inner tube 13 at one end of the double tube 10 as shown in FIG. Pressurized gas (compressed air or the like) is pressed into the tube. By press-fitting gas into the pressurizing case 51, as shown in FIG. 1 (1-B), in the tube delivery opening 59, the vicinity of the open end 35 of the tube 31 is outward (feeding direction, ie, The inner and outer surfaces of the tube 31 are reversed by being pressed toward the inside of the inner tube 13 of the double tube 10, and gas is press-fitted into the inverted tube 31 from the pressurizing case 51. C), as shown in (2-A) and (2-B) of FIG. 2, the tube 31 is sent out from the rotating shaft 53 and inserted to the back of the inner tube 13. At that time, the tube 31 is expanded (expanded) by the gas press-fitted into the tube 31 and inserted into the inner tube 13 while contacting the inner surface of the inner tube 13.

次に、図３の拡大図に示すように、前記チューブ３１に圧入した気体により前記二重管１０の内管１３を内側から支持した状態で、前記二重管１０の一端側から外管１１と内管１３間の空間１５にウレタン注入ノズル４１を内管１３内に挿入し、前記ウレタン注入ノズル４１の先端４３からポリウレタン原料Ｐを外管１１と内管１３間の空間１５に吐出する。前記先端４３は前記二重管１０の空間１５の奥まで挿入される。前記ウレタン注入ノズルの他端は、公知のポリウレタン原料注入装置（図示せず）に接続される。ポリウレタン原料Ｐは、ポリオール成分とポリイソシアネート成分からなり、反応により発泡してポリウレタン発泡体を形成する公知の原料であり、硬質ポリウレタン発泡原料が好適である。   Next, as shown in the enlarged view of FIG. 3, in the state where the inner pipe 13 of the double pipe 10 is supported from the inside by the gas press-fitted into the tube 31, the outer pipe 11 from one end side of the double pipe 10. A urethane injection nozzle 41 is inserted into the inner tube 13 in the space 15 between the inner tube 13 and the polyurethane material P is discharged from the tip 43 of the urethane injection nozzle 41 into the space 15 between the outer tube 11 and the inner tube 13. The tip 43 is inserted to the back of the space 15 of the double tube 10. The other end of the urethane injection nozzle is connected to a known polyurethane raw material injection device (not shown). The polyurethane raw material P includes a polyol component and a polyisocyanate component, and is a known raw material that foams by reaction to form a polyurethane foam, and a rigid polyurethane foam raw material is preferable.

前記ポリウレタン原料Ｐを二重管１０の外管１１と内管１３間の空間１５に吐出しながら、前記ウレタン注入ノズル４１を後退させて最終的に前記二重管１０から抜き取る。なお、前記ウレタン注入ノズル４１を二重管１０の外管１１と内管１３間の空間１５へ挿入する作業は、ノズルの種類により使い分ける。硬質のノズル、塩ビパイプ等であれば、作業者が、手作業で挿入し、リール状に巻き取ることのできる軟質のノズル、ゴム製チューブ等であれば、リール状に巻いた状態で、ノズルの一端から空気を挿入して空間１５に向かってチューブ等を送り出し（巻き出し）ながらリール状の中心側を走らす（転がす）ことで、ノズル先端（リール状に巻いた中心側の先端に相当）を空間１５の奥に位置させる。また、二重管１０から後退させて抜き取る作業は、手作業でたぐりよせるか、リール状の巻き取り機械で巻き取ることで行われる。   While the polyurethane raw material P is discharged into the space 15 between the outer tube 11 and the inner tube 13 of the double tube 10, the urethane injection nozzle 41 is retracted and finally extracted from the double tube 10. The operation of inserting the urethane injection nozzle 41 into the space 15 between the outer tube 11 and the inner tube 13 of the double tube 10 is selectively used depending on the type of nozzle. If it is a hard nozzle, PVC pipe, etc., the operator can insert it manually and wind it up in a reel. Nozzle tip (corresponding to the tip on the center side wound in a reel shape) by running (rolling) the reel-like center side while inserting air from one end of the nozzle and feeding (unwinding) the tube etc. toward the space 15 Is located in the back of the space 15. Further, the work of retreating from the double tube 10 and pulling it out is carried out manually or by winding it with a reel-shaped winding machine.

前記二重管１０の外管１１と内管１３間の空間１５に吐出されたポリウレタン原料Ｐは、発泡してポリウレタン樹脂（硬質ポリウレタン発泡体）Ｐ１（図４に示す）となり、前記外管１１と内管１３間の空間１５に充填される。その際、前記内管内１３のチューブ３１に圧入された気体により、前回内管１３が内側から支持されているため、ポリウレタン原料Ｐの発泡圧によって内管１３が破損することを防ぐことができ、内管１３の破損によってポリウレタン原料Ｐが内管１３内に侵入して発泡することも防ぐことができる。   The polyurethane raw material P discharged into the space 15 between the outer tube 11 and the inner tube 13 of the double tube 10 is foamed to become a polyurethane resin (hard polyurethane foam) P1 (shown in FIG. 4), and the outer tube 11 And the space 15 between the inner tube 13 is filled. At that time, since the previous inner tube 13 is supported from the inside by the gas press-fitted into the tube 31 of the inner tube 13, the inner tube 13 can be prevented from being damaged by the foaming pressure of the polyurethane raw material P. It is possible to prevent the polyurethane raw material P from entering the inner tube 13 and foaming due to breakage of the inner tube 13.

前記外管１１と内管１３間の空間１５でポリウレタン原料Ｐの発泡が終了することにより、前記外管１１と内管１３間の空間１５にウレタン樹脂Ｐ１を充填した後、図４の（４−Ａ）及び（４−Ｂ）に示すように、前記チューブ３１から気体を抜いて、前記チューブ３１の径を収縮させ、前記チューブ３１を前記二重管１０の内管１３から抜き取る。前記チューブ３１を内管１３から抜き取る作業は、前記加圧ケース５１のチューブ送り出し用開口部５９に固定されているチューブ３１の端部を加圧ケース５１から外し、外したチューブ３１の端部を巻き取り装置（図示せず）の巻き取り軸に固定し、該巻き取り装置の回転軸を回転させることにより容易に行うことができる。   After the foaming of the polyurethane raw material P is completed in the space 15 between the outer tube 11 and the inner tube 13, the space 15 between the outer tube 11 and the inner tube 13 is filled with the urethane resin P1, and then (4) in FIG. As shown in -A) and (4-B), the gas is extracted from the tube 31, the diameter of the tube 31 is contracted, and the tube 31 is extracted from the inner tube 13 of the double tube 10. The operation of pulling out the tube 31 from the inner tube 13 is performed by removing the end of the tube 31 fixed to the tube delivery opening 59 of the pressurizing case 51 from the pressurizing case 51 and removing the end of the removed tube 31. It can be easily performed by fixing to a winding shaft of a winding device (not shown) and rotating the rotating shaft of the winding device.

このように、本発明によれば、二重管の内管内に挿入したチューブに気体を圧入して内管を内側から支持した状態で、外管と内管間の空間でポリウレタン原料を発泡させるため、発泡圧で内管が破損するのを防ぐことができる。しかも、二重管の外管を開削する必要がないため、補修作業が容易であり補修費用を抑えることができる。   Thus, according to the present invention, the polyurethane raw material is foamed in the space between the outer tube and the inner tube in a state where the gas is pressed into the tube inserted into the inner tube of the double tube and the inner tube is supported from the inside. Therefore, it is possible to prevent the inner tube from being damaged by the foaming pressure. Moreover, since it is not necessary to open the outer pipe of the double pipe, the repair work is easy and the repair cost can be reduced.

１０ 二重管
１１ 外管
１３ 内管
１５ 外管と内管間の空間
３１ チューブ
４１ ウレタン注入ノズル
５０ チューブ反転送り出し装置
５１ 加圧ケース
５３ 回転軸
５９ チューブ送り出し用開口部
Ｐ ポリウレタン原料
Ｐ１ ポリウレタン樹脂 DESCRIPTION OF SYMBOLS 10 Duplex pipe 11 Outer pipe 13 Inner pipe 15 Space between outer pipe and inner pipe 31 Tube 41 Urethane injection nozzle 50 Tube reversal feeding device 51 Pressure case 53 Rotating shaft 59 Tube feed opening P Polyurethane raw material P1 Polyurethane resin

Claims (2)

外管と内管間に空間を有する二重管の補修方法において、
前記内管内に挿入したチューブに気体を圧入して前記チューブを膨張させることにより前記内管の内面に当接させ、
前記膨張したチューブで前記内管を内側から支持しながら前記外管と前記内管間の空間にポリウレタン原料を吐出して発泡させ、
前記発泡したポリウレタン樹脂で前記外管と前記内管間の空間を充填することを特徴とする二重管の補修方法。 In the repair method of the double pipe having a space between the outer pipe and the inner pipe,
Pressing a gas into a tube inserted into the inner tube and expanding the tube to contact the inner surface of the inner tube,
While supporting the inner tube from the inside with the expanded tube, the polyurethane raw material is discharged and foamed into the space between the outer tube and the inner tube,
A method of repairing a double pipe, comprising filling the space between the outer pipe and the inner pipe with the foamed polyurethane resin. 前記チューブが一端で閉じ他端で開口したものからなり、
加圧ケース内の回転軸に前記チューブを閉じた一端側から巻き取り、前記加圧ケースに形成されているチューブ送り出し用開口部に前記チューブの開口端の周縁を固定し、前記チューブ送り出し用開口部を前記チューブの開口端側で塞いだ状態とし、
前記加圧ケース内に加圧気体を吹き込むことにより、前記チューブ送り出し用開口部から前記チューブを内外反転させ、かつ膨張させながら前記内管内に送り出して前記チューブを前記内管内に挿入すると共に、前記内管の内面に当接させることを特徴とする請求項１に記載の二重管の補修方法。 The tube consists of one closed at one end and opened at the other end,
The tube is wound from one end side of the tube closed on the rotating shaft, the tube feed opening formed in the pressure case is fixed to the opening end of the tube, and the tube feed opening is fixed. A state where the portion is closed at the opening end side of the tube,
By blowing pressurized gas into the pressurizing case, the tube is reversed from the inside to the outside through the tube delivery opening, and the tube is inserted into the inner tube while being expanded, and the tube is inserted into the inner tube. 2. The method for repairing a double pipe according to claim 1, wherein the inner pipe is brought into contact with the inner surface of the inner pipe.
JP2009052900A 2009-03-06 2009-03-06 Repair method of double pipe Expired - Fee Related JP5364400B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014228068A (en) * 2013-05-22 2014-12-08 東日本旅客鉄道株式会社 Emergency repairing method of water conduit pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62254882A (en) * 1986-04-25 1987-11-06 Osaka Bosui Constr Co Ltd Method for repairing buried pipeline
JPH02194928A (en) * 1989-01-25 1990-08-01 Sekisui Chem Co Ltd Engineering method for lining existing pipe
JP2007023522A (en) * 2005-07-13 2007-02-01 Nikko Kensetsu Kk Earthquake-proof structure of buried pipe and its manufacturing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62254882A (en) * 1986-04-25 1987-11-06 Osaka Bosui Constr Co Ltd Method for repairing buried pipeline
JPH02194928A (en) * 1989-01-25 1990-08-01 Sekisui Chem Co Ltd Engineering method for lining existing pipe
JP2007023522A (en) * 2005-07-13 2007-02-01 Nikko Kensetsu Kk Earthquake-proof structure of buried pipe and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014228068A (en) * 2013-05-22 2014-12-08 東日本旅客鉄道株式会社 Emergency repairing method of water conduit pipe

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