JPH07328537A - Lining technique for thick film - Google Patents
Lining technique for thick filmInfo
- Publication number
- JPH07328537A JPH07328537A JP12248694A JP12248694A JPH07328537A JP H07328537 A JPH07328537 A JP H07328537A JP 12248694 A JP12248694 A JP 12248694A JP 12248694 A JP12248694 A JP 12248694A JP H07328537 A JPH07328537 A JP H07328537A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- pig
- lining
- pipe
- film
- 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
Links
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、地下に埋設されるガス
管，水道管等の既設配管において、補修管の管内面にラ
イニング樹脂の塗膜を形成して更生修理するライニング
工法に関し、詳しくは、長尺の補修管に厚膜ランニング
する厚膜ランニング工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining method for forming a coating film of a lining resin on the inner surface of a repair pipe in an existing pipe such as a gas pipe or a water pipe buried underground to rehabilitate it. Relates to a thick film running method for running a thick film on a long repair pipe.
【０００２】[0002]
【従来の技術】地下に埋設されたガス管，水道管等の既
設配管は、長年使用されると、腐食等が進んでガス漏れ
等を生じるおそれがある。そこで修理の必要な補修管
を、地下埋設状態のままその管内面に樹脂のライニング
塗膜を施して更生修理する工法が知られている。この場
合の樹脂ライニングは、全体で必要な液状の樹脂を管内
部中を搬送しつつその管内面に付着して樹脂の塗膜を形
成するものである。2. Description of the Related Art If existing pipes such as gas pipes and water pipes buried underground are used for many years, there is a risk that gas will leak due to corrosion and the like. Therefore, there is known a method of repairing a repair pipe requiring repair by applying a resin lining coating film to the inner surface of the pipe while being buried underground. In this case, the resin lining is to form a coating film of the resin by transporting the required liquid resin as a whole inside the pipe and adhering it to the inner surface of the pipe.
【０００３】厚膜ライニングは、例えば３０，０００ｃ
ｐｓの高粘度樹脂を使用して例えば３〜７ｍｍの厚い塗
膜を形成するものであり、この場合のライニング工法と
して樹脂の粘度が高いことを考慮してピグ移動法，空気
圧移動法（ＳＨＯＴライニング）が提案されている。ピ
グ移動法は、ピグの前方に配置される樹脂をピグの牽引
により押圧して搬送し、管内面にピグ外周とのクリアラ
ンスに応じ樹脂を付着して塗膜を形成するものである。
空気圧移動法は、補修管の一端に注入される樹脂にコン
プレッサ等による高圧空気を作用し、この空気圧による
押圧力で樹脂をプラグ状で気流搬送しつつ管内面に付着
して塗膜を形成するものであり、この場合に塗膜の厚さ
に対して空気圧，樹脂の粘度，ライニング速度等を適正
に制御する。Thick film linings are, for example, 30,000c
A high-viscosity resin of ps is used to form a thick coating film of, for example, 3 to 7 mm. As a lining method in this case, a pig moving method and an air pressure moving method (SHOT lining) are used in consideration of the high viscosity of the resin. ) Is proposed. In the pig moving method, the resin arranged in front of the pig is pressed and conveyed by the pulling of the pig, and the resin is attached to the inner surface of the pipe according to the clearance with the outer periphery of the pig to form a coating film.
In the pneumatic transfer method, high-pressure air from a compressor is applied to the resin injected into one end of the repair pipe, and the pressing force of this air pressure causes the resin to flow in a plug-like air stream and adhere to the inner surface of the pipe to form a coating film. In this case, the air pressure, the viscosity of the resin, the lining speed, etc. are properly controlled with respect to the thickness of the coating film.
【０００４】ここで長尺の補修管の厚膜ライニングで
は、全体の樹脂量が非常に多くなる。そこでピグ移動法
においてピグ前方に多量の樹脂を配置すると、所定の樹
脂量以上では樹脂圧が大き過ぎてピグのみが移動してし
まい樹脂を搬送できなくなる。空気移動法においても所
定の樹脂量以上では、空気のみが抜けて樹脂を搬送でき
なくなる。こうしていずれの場合も１回の搬送可能な樹
脂量には限界があり、長尺の場合は樹脂を複数回に分け
て搬送することを余儀無くされる。従って、長尺の補修
管の厚膜ライニングでは、少なくとも多量の樹脂を搬送
して荒塗りする１次ライニングで、その樹脂を複数回に
分けて繰返し搬送することが前提となる。Here, in the thick film lining of a long repair pipe, the total amount of resin becomes very large. Therefore, when a large amount of resin is placed in front of the pig in the pig moving method, the resin pressure is too large above the predetermined amount of resin, and only the pig moves, making it impossible to convey the resin. Even in the air transfer method, when the amount of resin is more than a predetermined amount, only air escapes and the resin cannot be conveyed. Thus, in either case, the amount of resin that can be conveyed once is limited, and in the case of a long resin, it is inevitable to convey the resin in multiple steps. Therefore, in the thick film lining of a long repair pipe, it is premised that at least a large amount of resin is conveyed and rough coating is performed in the primary lining, and the resin is repeatedly conveyed in plural times.
【０００５】ここでピグ移動法では、樹脂を分割搬送す
る場合でも塗膜の厚さは略一定化する利点があるが、牽
引装置に牽引ロープにより連結されるピグを繰返し往復
移動することになって、作業性が悪い。また空気圧移動
法では、樹脂を注入して空気圧作用することを繰返せば
良いので作業性は良いが、膜厚の変動が大きくて歩留り
が悪く、均し作業も煩雑になる。そこで作業性の良い空
気圧移動法をベースとして膜厚の変動が少ない荒塗りの
１次ライニング工法を開発し、且つピグによる仕上げの
２次ライニングも容易化することが望まれる。In the pig moving method, the thickness of the coating film is substantially constant even when the resin is divided and conveyed, but the pig connected to the pulling device by the pulling rope is repeatedly moved back and forth. And workability is poor. Further, in the pneumatic pressure transfer method, the workability is good because it is only necessary to inject the resin and act on the pneumatic pressure repeatedly, but the fluctuation of the film thickness is large and the yield is poor, and the leveling work becomes complicated. Therefore, it is desired to develop a rough-coating primary lining method with little fluctuation in film thickness based on the pneumatic transfer method, which has good workability, and to facilitate secondary lining for finishing with a pig.
【０００６】従来、上記空気圧移動法による厚膜ライニ
ングに関しては、例えば特開昭６１−２７１０７０号公
報の先行技術がある。この先行技術において、被処理管
の内部に弾力性を有する滑動体を挿入し、滑動体の後方
へ高粘性のライニング材を注入し、ライニング材により
被処理管の内部を略閉塞状態にしてライニング材の前後
に圧力差を発生させ、この圧力差でライニング材と滑動
体を流動させて管内壁面にライニング皮膜を形成するこ
とが示されている。Conventionally, as a thick film lining by the air pressure moving method, there is a prior art disclosed in, for example, Japanese Patent Application Laid-Open No. 61-271070. In this prior art, a sliding body having elasticity is inserted into the inside of the pipe to be treated, a highly viscous lining material is injected to the rear of the sliding body, and the inside of the pipe to be treated is substantially closed by the lining material. It is shown that a pressure difference is generated before and after the material, and the pressure difference causes the lining material and the sliding body to flow to form a lining film on the inner wall surface of the pipe.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上記先行技
術のものにあっては、ライニング材をその前後の圧力差
により搬送する工法であるから、上述するように１回の
搬送可能なライニング材の量には限界があり、長尺の場
合にはこのまま適応できない。滑動体は、被処理管に嵌
合してライニング材が前方へたれて延びるのを防止する
ものであるから、ライニング材の搬送，皮膜形成には直
接関与しない。また、ピグの自重により、該ピグが管路
内で下方へ偏るため管路内上面のライニング膜が厚く、
逆に管路内下面のライニング膜が薄くなり、管路内に均
一なライニング膜が形成できない問題点が派生する。By the way, in the above prior art, since the lining material is conveyed by the pressure difference between the front and the rear thereof, as described above, the lining material which can be conveyed once is used. There is a limit to the amount, and if it is long, it cannot be applied as it is. Since the sliding body is fitted to the pipe to be treated and prevents the lining material from sloping forward and extending, it does not directly participate in the conveyance of the lining material and the film formation. Also, due to the weight of the pig, the pig is biased downward in the pipe line, so the lining film on the upper surface of the pipe line is thick,
On the contrary, the lining film on the lower surface of the pipe becomes thin, which causes a problem that a uniform lining film cannot be formed in the pipe.
【０００８】本発明は、このような点に鑑み、長尺の補
修管の厚膜ライニングにおいて、荒塗りの作業性と膜厚
の均一性を向上し、且つピグによる仕上げも容易化する
ことを目的とする。In view of the above, the present invention improves the workability of rough coating and the uniformity of the film thickness in the thick film lining of a long repair pipe, and also facilitates the finishing with a pig. To aim.
【０００９】[0009]
【課題を解決するための手段】この目的を達成するため
本発明は、長尺の補修管の内面に設定厚の塗膜を、荒塗
りの１次ライニングと、仕上げの２次ライニングで形成
する厚膜ライニング工法において、１次ライニングで
は、ライニング膜の設定厚と略同程度の径を有するワイ
ヤを補修管の始端開口部から終端開口部に亘って該管路
内面下に布設し、適当な量の樹脂を始端開口部より管路
内に導入し、補修管の内面との間に設定厚に対応するク
リアランスを有するピグを前記ワイヤの上に載せること
で該ピグを管路内にセンタリングして導入し、次いでピ
グを空気圧搬送して管路内面に厚い樹脂膜を形成しつつ
樹脂搬送し、搬送完了後再び樹脂を始端開口部より管路
内に導入して樹脂搬送を繰返すことで多量の樹脂を複数
回に分けて長尺の補修管の内部全長に搬送して厚い樹脂
膜を形成し、２次ライニングでは、補修管内に仕上げピ
グを牽引移動して１次ライニングで形成した厚い樹脂膜
を均し、補修管の内部全長に厚い塗膜を形成することを
特徴とする。In order to achieve this object, the present invention forms a coating film of a set thickness on the inner surface of a long repair pipe by a rough coating primary lining and a finishing secondary lining. In the thick film lining method, in the primary lining, a wire having a diameter substantially equal to the set thickness of the lining film is laid under the inner surface of the pipe from the start end opening to the end opening of the repair pipe, A certain amount of resin is introduced into the pipe through the opening at the start end, and a pig having a clearance corresponding to the set thickness between the pig and the inner surface of the repair pipe is placed on the wire to center the pig in the pipe. Then, the pig is pneumatically conveyed to form a thick resin film on the inner surface of the pipe to convey the resin, and after the conveyance is completed, the resin is again introduced into the pipe from the opening at the start end and the resin conveyance is repeated to make a large amount. Of resin is divided into multiple A thick resin film is formed by transporting it over the entire length of the inside of the pipe, and in the secondary lining, the finishing pig is pulled into the repair pipe to level the thick resin film formed by the primary lining, making it thick over the entire length of the repair pipe. It is characterized by forming a coating film.
【００１０】この発明において、ピグは軽くて弾性を有
するものが望ましいが、これのみに限定されない。仕上
げピグはそのクリアランスにより均すものであれば、い
かなる形状であっても良い。更に、２次ライニングのピ
グ移動には１次ライニングで補修管内部に布設されるワ
イヤを利用することができるが、このワイヤを使用しな
くても良い。In the present invention, the pig is preferably light and elastic, but is not limited thereto. The finishing pig may have any shape as long as it is smoothed by the clearance. Furthermore, although the wire laid inside the repair pipe by the primary lining can be used for pig movement of the secondary lining, this wire need not be used.
【００１１】[0011]
【作用】上記ライニング工法による本発明では、長尺の
補修管の１次ライニングの際に、ピグがワイヤによりセ
ンターリングして補修管に挿入されることで、ピグ全周
のクリアランスが略等しくなる。ここで長尺の補修管の
厚膜ライニングには多量の樹脂が必要になるが、先ずこ
の球ピグを戻した状態でその前方に樹脂を充填し、次い
で球ピグを空気圧搬送して球ピグにより厚い樹脂膜を形
成しつつ樹脂搬送し、その後減圧して球ピグを戻すこと
を繰返してライニングされ、このため多量の樹脂が複数
回に分けて、球ピグの空気圧搬送により長尺の補給管の
内部全長に確実に搬送される。このとき球ピグの全周の
等しいクリアランスにより、補修管に厚くて均一な樹脂
膜が形成されて、仕上げし易くなる。In the present invention based on the above-mentioned lining construction method, when the long repair pipe is subjected to the primary lining, the pig is centered by the wire and inserted into the repair pipe, so that the clearances around the entire circumference of the pig become substantially equal. . A large amount of resin is required for the thick film lining of a long repair tube, but first, in the state where this ball pig is returned, the resin is filled in front of it, and then the ball pig is pneumatically conveyed and the ball pig is used. The resin is conveyed while forming a thick resin film, and then the pressure is reduced and the ball pig is returned to the lining to be repeated.For this reason, a large amount of resin is divided into multiple times, and pneumatic conveyance of the ball pig allows the long supply pipe Reliably transported to the entire internal length. At this time, a thick and uniform resin film is formed on the repair pipe due to the same clearance around the entire circumference of the ball pig, which facilitates finishing.
【００１２】１次ライニング後の２次ライニングでは、
補修管の樹脂膜中に仕上げピグを牽引移動することで、
この仕上げピグのクリアランスにより樹脂膜が更に所定
の膜厚に均される。そして長尺の補修管の内部全長に厚
い塗膜が、高い精度で形成される。In the secondary lining after the primary lining,
By pulling and moving the finishing pig in the resin film of the repair pipe,
The clearance of the finishing pig further equalizes the resin film to a predetermined film thickness. Then, a thick coating film is formed with high accuracy on the entire inner length of the long repair pipe.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。厚膜ライニング工法の概略について説明すると、
先ず空気圧移動法をベースとした荒塗りの１次ライニン
グを行い、次にピグ移動法による仕上げの２次ライニン
グを行うものである。図１において、１次ライニングシ
ステムの全体の構成について説明する。符号１は地下に
埋設されたガス管，水道管等の既設管路で、管内径が例
えば７０〜８０ｍｍ，管長が例えば１００〜２００ｍの
長尺の太い補修管である。樹脂Ａは、エポキシ樹脂と硬
化剤を配合した厚膜ライニング可能な例えば３０，００
０ｃｐｓの高粘度樹脂であり、この樹脂Ａを用いて長尺
の補修管１の管内面全長に例えば３〜７ｍｍの厚い塗膜
を形成するものである。Embodiments of the present invention will be described below with reference to the drawings. Explaining the outline of the thick film lining method,
First, a rough coating primary lining based on the pneumatic transfer method is performed, and then a secondary secondary lining is performed by the pig transfer method. In FIG. 1, the overall configuration of the primary lining system will be described. Reference numeral 1 is an existing pipeline such as a gas pipe and a water pipe buried underground, which is a long and thick repair pipe having a pipe inner diameter of, for example, 70 to 80 mm and a pipe length of, for example, 100 to 200 m. The resin A is, for example, 30,000 capable of thick film lining containing an epoxy resin and a curing agent.
It is a high viscosity resin of 0 cps, and this resin A is used to form a thick coating film of, for example, 3 to 7 mm on the entire length of the inner surface of the long repair pipe 1.
【００１４】そこで長尺の補修管１には、空気圧移動法
をベースとした樹脂搬送装置２が連設される。樹脂搬送
装置２は、補修管１の内部全長の底に牽引を兼ねたピグ
位置決めのワイヤ３が布設される。また空気圧移動法で
の膜厚変動を低減するため、球形の球ピグ４が管内部に
ワイヤ３に載って挿入される。補修管１の一端開口部に
は所定の長さのランチャー５が閉塞して連結され、他端
開口部には余剰樹脂や球ピグ４を回収するレシーバ６が
連結される。Therefore, a resin conveying device 2 based on the pneumatic transfer method is connected to the long repair pipe 1. In the resin transporting device 2, a pig positioning wire 3 also serving as a traction is laid on the bottom of the entire length of the repair pipe 1. Further, in order to reduce the film thickness variation in the pneumatic transfer method, a spherical ball pig 4 is inserted on the wire 3 inside the tube. A launcher 5 having a predetermined length is closed and connected to an opening of one end of the repair pipe 1, and a receiver 6 for collecting excess resin and the ball pig 4 is connected to an opening of the other end.
【００１５】ランチャー５において球ピグ４が最も後退
した場合の球ピグ直前の位置に樹脂注入タンク７が管路
８を介して連通され、加圧機能と減圧機能との両方を兼
ね備えるコンプレッサ１０の吐出側が管路９によりタン
ク７の樹脂上部の加圧摺動板１１に、高圧空気により樹
脂Ａを注入するように連通される。コンプレッサ１０の
吐出側は、圧力調整するレギュレータ１２，管路１３を
介してランチャー５に、高圧空気を導入して加圧するこ
とで球ピグ４と共に樹脂Ａを搬送するように連通され
る。またコンプレッサ１０の吸入側も管路１４によりラ
ンチャー５に、減圧して球ピグ４を自動的に戻すことが
可能に連通される。When the ball pig 4 is most retracted in the launcher 5, a resin injection tank 7 is connected to a position immediately before the ball pig via a pipe line 8 and the discharge of a compressor 10 having both a pressurizing function and a depressurizing function. The side is communicated with the pressure sliding plate 11 on the upper portion of the resin of the tank 7 through the pipe line 9 so as to inject the resin A by high pressure air. The discharge side of the compressor 10 is communicated with the launcher 5 via a regulator 12 for adjusting the pressure and a pipe line 13 so that the high-pressure air is introduced and pressurized to convey the resin A together with the ball pig 4. Further, the suction side of the compressor 10 is also communicated with the launcher 5 by a pipe line 14 so that the ball pig 4 can be automatically returned by reducing the pressure.
【００１６】また多量の樹脂Ａを複数回に分けて繰返し
搬送する制御系として、上述の各管路８，９，１３，１
４にそれぞれバルブ２０〜２３が設けられ、コンプレッ
サ１０の吸入、吐出側にもバルブ１８，１９が設けられ
る。また加圧による球ピグ４の樹脂搬送の際には、加圧
空気の吹き抜けにより搬送終了を検知できるため、この
吹き抜けを検出する圧力センサ２４が設けられ、これら
バルブ１８〜２３と圧力センサ２４がコントローラ２５
に接続される。Further, as a control system for repeatedly conveying a large amount of resin A in a plurality of times, each of the above-mentioned pipe lines 8, 9, 13, 1 is used.
4 are provided with valves 20 to 23, and valves 18 and 19 are also provided on the suction side and the discharge side of the compressor 10. Further, when the resin of the ball pig 4 is conveyed by pressurization, the end of the conveyance can be detected by the blow-through of the pressurized air. Therefore, the pressure sensor 24 for detecting the blow-through is provided, and the valves 18 to 23 and the pressure sensor 24 are provided. Controller 25
Connected to.
【００１７】コントローラ２５は、圧力センサ２４によ
る圧力を表示するメータ２９、バルブ１８，２０〜２２
を閉じバルブ１９，２３を開いて補修管１のランチャー
５側を減圧する球ピグ戻しボタン２６を有する。またバ
ルブ１９，２０，２２，２３を閉じバルブ１８，２１を
開いて、樹脂注入タンク７を加圧する樹脂注入ボタン２
７を有する。更に、バルブ１９〜２１，２３を閉じバル
ブ１８，２２を開いて、ランチャー５に高圧空気を導入
する球ピグ加圧ボタン２８を有する。そしてメータ２９
の圧力表示で樹脂搬送状態を判断しながらボタン２６〜
２８を操作することで、多量の樹脂を複数回に分けて迅
速且つ確実に搬送することが可能になっている。The controller 25 includes a meter 29 for displaying the pressure from the pressure sensor 24 and valves 18, 20 to 22.
Has a ball pig return button 26 for depressurizing the launcher 5 side of the repair pipe 1 by closing the valves 19 and 23. Further, the resin injection button 2 for closing the valves 19, 20, 22, 23 and opening the valves 18, 21 to pressurize the resin injection tank 7
Have 7. Further, the valves 19 to 21 and 23 are closed and the valves 18 and 22 are opened to have a ball pig pressurizing button 28 for introducing high pressure air into the launcher 5. And meter 29
Button 26-
By operating 28, a large amount of resin can be quickly and reliably conveyed in a plurality of times.
【００１８】球ピグ４は、軽量の弾性体の材料で作られ
て、段差やバリ等があっても迅速且つ確実に移動するこ
とが可能になっている。また球ピグ４の大きさは、図２
のように管内径より所定のクリアランスＣ１だけ小さく
形成されるが、このクリアランスＣ１は目標とする厚い
膜厚，ピグ自体の変形，クリアランスにかかる樹脂圧等
を考慮して、樹脂を確実に搬送でき且つ目標とする膜厚
より若干厚い樹脂膜Ｂを形成するように設定される。ワ
イヤ３の太さも、クリアランスＣ１と略等しく設定され
る。そして球ピグ４がワイヤ３の上に載って移動し、ピ
グ全周のクリアランスＣ１が略等しくなるように管中心
に位置決めされる。The ball pig 4 is made of a lightweight elastic material and can move quickly and reliably even if there are steps or burrs. The size of the ball pig 4 is as shown in FIG.
As described above, the clearance C1 is formed smaller than the inner diameter of the pipe by a predetermined clearance C1. However, the clearance C1 can reliably transfer the resin in consideration of the target thick film thickness, the deformation of the pig itself, the resin pressure applied to the clearance, and the like. In addition, the resin film B is set to be slightly thicker than the target film thickness. The thickness of the wire 3 is also set to be substantially equal to the clearance C1. Then, the spherical pig 4 moves on the wire 3 and is positioned at the center of the pipe so that the clearances C1 around the entire circumference of the pig are substantially equal.
【００１９】ここで管内径Ｄと目標とする膜厚ｔにより
１ｍ当たりの樹脂量Ｑが算出され、この樹脂量Ｑに管長
Ｌを乗算することで全体の必要量Ｇが計算される。ここ
で例えばＤ＝８１ｍｍ，Ｌ＝１００ｍ，ｔ＝５ｍｍの場
合は、Ｑ＝１．４３ｋｇ／ｍとなり、Ｇ＝１４３ｋｇと
なる。また１回の球ピグ４で搬送可能な限界量Ｌは、空
気圧，球ピグ４の大きさ等により決まり、この限界量Ｌ
が例えば３０ｋｇの場合は、全体の必要量１４３ｋｇを
５回に分ければ良い。そこでタンク７による樹脂注入の
場合には、タイマ時間等によりこの限界量Ｌ以下に分割
して注入される。Here, the resin amount Q per 1 m is calculated from the pipe inner diameter D and the target film thickness t, and the total required amount G is calculated by multiplying the resin amount Q by the pipe length L. Here, for example, when D = 81 mm, L = 100 m, and t = 5 mm, Q = 1.43 kg / m and G = 143 kg. Further, the limit amount L that can be conveyed by one ball pig 4 is determined by the air pressure, the size of the ball pig 4, and the like.
If, for example, is 30 kg, the total required amount of 143 kg may be divided into 5 times. Therefore, in the case of resin injection by the tank 7, the resin is injected by dividing it into the limit amount L or less depending on the timer time or the like.
【００２０】図３において、２次ライニングシステムに
ついて説明する。このシステムは補修管１の底に布設さ
れるワイヤ３を利用して、このワイヤ３にピグ移動法の
仕上げ装置３０が設けられる。仕上げ装置３０は、補修
管１のワイヤ３の一方が管外部の牽引装置３１に連結さ
れ、その他方に複数個の仕上げピグ３２が連結される。
仕上げピグ３２は、ネオプレンスポンジ等の軟質弾性体
の材料で作られ、軽くて、径方向に弾性変形可能であ
り、胴部の周囲に例えば４つのウイング３２ａが等間隔
で放射状に突設され、ピグ３２を常に管内部中心にセン
ターリングすることが可能になっている。また胴部の後
ろに膜厚と等しいクリアランスＣ２の円柱状の絞り部３
２ｂが連接され、この絞り部３２ｂによりワイヤ３やウ
イング３２ａの跡を樹脂で埋めて、１次ライニングの樹
脂膜Ｂを更に所定の膜厚に均すようになっている。Referring to FIG. 3, the secondary lining system will be described. This system uses a wire 3 laid on the bottom of the repair pipe 1, and the wire 3 is provided with a finishing device 30 of a pig moving method. In the finishing device 30, one of the wires 3 of the repair pipe 1 is connected to a pulling device 31 outside the pipe, and a plurality of finishing pigs 32 are connected to the other end.
The finishing pig 32 is made of a soft elastic material such as neoprene sponge, is light and is elastically deformable in the radial direction, and for example, four wings 32a are radially projected at equal intervals around the body, The pig 32 can always be centered on the inside of the pipe. Also, behind the body, there is a cylindrical throttle 3 having a clearance C2 equal to the film thickness.
2b are connected to each other, and the traces of the wires 3 and the wings 32a are filled with the resin by the narrowed portion 32b so that the resin film B of the primary lining is further leveled to a predetermined film thickness.
【００２１】次に、長尺の補修管１１に厚膜ライニング
する場合の作用を、図４を用いて説明する。先ず、補修
管１に図１の１次ライニングの樹脂搬送装置２のランチ
ャー５，レシーバ６，樹脂を入れた樹脂注入タンク７，
コンプレッサ１０等を取付け、且つ補修管１の内部の底
にワイヤ３を布設して球ピグ４を挿入する。そしてコン
プレッサ１０を作動し、コントローラ２５によりバルブ
開閉可能にして、１次ライニングを行う。即ち、先ず図
４（ａ）のように球ピグ４をランチャー５に戻した状態
でコントローラ２５の樹脂注入ボタン２７を操作する
と、コンプレッサ１０により樹脂注入タンク７を加圧し
て複数回に分割した量の高粘度の樹脂Ａ１がランチャー
５の球ピグ４の直前に注入して充填される。Next, the operation of lining the long repair tube 11 with a thick film will be described with reference to FIG. First, the repair pipe 1 has a launcher 5, a receiver 6, a resin injection tank 7 containing a resin, and a resin injection device 7 in which a resin carrier 2 for the primary lining shown in FIG.
The compressor 10 and the like are attached, the wire 3 is laid on the bottom inside the repair pipe 1, and the ball pig 4 is inserted. Then, the compressor 10 is operated, the valve is opened and closed by the controller 25, and the primary lining is performed. That is, first, when the resin injection button 27 of the controller 25 is operated in a state where the ball pig 4 is returned to the launcher 5 as shown in FIG. 4A, the resin injection tank 7 is pressurized by the compressor 10 and is divided into a plurality of parts. The highly viscous resin A1 is injected and filled just before the ball pig 4 of the launcher 5.
【００２２】次いでコントローラ２５の球ピグ４加圧ボ
タン２８を操作すると、コンプレッサ１０によりランチ
ャー５に高圧空気が導入し、その空気圧ｄが球ピグ４に
作用して押圧される。そこで球ピグ４は、ピグ全周のク
リアランスＣ１の樹脂圧に抗してランチャー５から補修
管１中を搬送され、このため球ピグ４の前方に充填され
る樹脂Ａ１も図４（ｂ）のように、クリアランスＣ１か
ら樹脂の一部を後方に漏洩しつつプラグ状で連続的に搬
送される。このとき球ピグ４は球形であるため、補修管
１の段差や曲線部でも支障なく搬送され、弾性体である
ため、管内面のバリ等により容易に変形して同様に搬送
され、このため樹脂Ａ１も確実に搬送される。Next, when the ball pig 4 pressurizing button 28 of the controller 25 is operated, high pressure air is introduced into the launcher 5 by the compressor 10, and the air pressure d acts on the ball pig 4 to press it. Therefore, the ball pig 4 is conveyed through the repair pipe 1 from the launcher 5 against the resin pressure of the clearance C1 around the entire circumference of the pig, and therefore the resin A1 filled in front of the ball pig 4 is also shown in FIG. As described above, a part of the resin leaks backward from the clearance C1 and is continuously conveyed in the form of a plug. At this time, since the spherical pig 4 has a spherical shape, the spherical pig 4 can be conveyed without any trouble even on a step or a curved portion of the repair pipe 1, and since it is an elastic body, it can be easily deformed by burr on the inner surface of the pipe and similarly conveyed, and therefore, the resin A1 is also reliably transported.
【００２３】また球ピグ４はワイヤ３により管中心に位
置決してピグ全周のクリアランスＣ１が略等しいため、
球ピグ４の円形の外周面により樹脂Ａ１が管内面に厚く
均一に塗り付けられる。そこで補修管１の所定の長さに
は所定量の樹脂Ａ１が確実に付着して、その内面全周に
は目標とする厚い膜厚より若干厚い樹脂膜Ｂ１が形成さ
れ、こうして長尺の補修管１の内部には一端より厚くて
均一な樹脂膜Ｂ１が順次形成される。The ball pig 4 is located at the center of the tube by the wire 3, and the clearance C1 around the entire circumference of the pig is substantially equal.
The resin A1 is thickly and uniformly applied to the inner surface of the tube by the circular outer peripheral surface of the spherical pig 4. Therefore, a predetermined amount of the resin A1 is surely adhered to a predetermined length of the repair pipe 1, and a resin film B1 slightly thicker than the target thick film is formed on the entire inner surface of the repair pipe 1. A uniform resin film B1 thicker than one end is sequentially formed inside the tube 1.
【００２４】そして球ピグ４の前方の樹脂が管内面に付
着して無くなると、図４（ｃ）のように球ピグ４と共に
加圧空気が吹く抜け、圧力センサ２４によりこのことが
検出される。この場合は、コントローラ２５の球ピグ４
戻しボタン２６を操作すると、ランチャー５側が減圧し
て球ピグ４は迅速且つ自動的に戻り、こうして１回目の
ライニングを終了する。When the resin in front of the ball pig 4 adheres to the inner surface of the tube and disappears, pressurized air blows out together with the ball pig 4 as shown in FIG. 4C, and this is detected by the pressure sensor 24. . In this case, the ball pig 4 of the controller 25
When the return button 26 is operated, the launcher 5 side is depressurized and the ball pig 4 returns quickly and automatically, thus ending the first lining.
【００２５】２回目も、図４（ｄ）のように先ず分割さ
れた樹脂Ａ２を加圧して注入し、次にランチャー５を加
圧する。すると球ピグ４と樹脂Ａ２は最初に１回目にラ
イニングされた樹脂膜Ｂ１中を進み、この場合は樹脂同
志で粘性抵抗が非常に小さいことで滑るように移動し、
このため球ピグ４の前方に樹脂Ａ２の全部を保った状態
で容易に搬送される。そして１回目のライニングによる
樹脂膜Ｂ１が切れると、それ以降は図４（ｅ）のように
球ピグ４の前方の樹脂Ａ２が管内面に付着して、そのク
リアランスＣ１に大きい樹脂圧がかかる。そこで球ピグ
４の空気圧搬送に伴いその前方の樹脂Ａ２が、同様に搬
送しつつ管内面に付着して樹脂膜Ｂ２が連続して形成さ
れ、ライニング距離が継ぎ足して更に延びる。その後、
加圧空気の吹き抜けを圧力センサ２４で検出すると、再
び球ピグ４が減圧により戻され、こうして２回目のライ
ニングを終了する。Also in the second time, as shown in FIG. 4D, the divided resin A2 is first pressurized and injected, and then the launcher 5 is pressurized. Then, the ball pig 4 and the resin A2 first move in the resin film B1 lined for the first time, and in this case, because the viscous resistance is very small between the resins, they move slidably,
Therefore, the resin A2 can be easily conveyed in front of the ball pig 4 while keeping the entire resin A2. When the resin film B1 is cut by the first lining, the resin A2 in front of the ball pig 4 adheres to the inner surface of the tube as shown in FIG. 4 (e), and a large resin pressure is applied to the clearance C1. Therefore, the resin A2 in front of the spherical pig 4 is adhered to the inner surface of the pipe while being similarly conveyed, and the resin film B2 is continuously formed, and the lining distance is extended to further extend. afterwards,
When the blow-through of the pressurized air is detected by the pressure sensor 24, the ball pig 4 is returned again by the pressure reduction, and thus the second lining is completed.
【００２６】以下同様にして、３回目以降のライニング
を繰返すことにより、長尺の補修管１の厚膜ライニング
に必要な多量の樹脂Ａが複数回に分けて補修管１中を適
切に搬送され、その長尺の補修管１の内部全長に多量の
樹脂Ａが連続して確実に付着される。そして球ピグ４に
より図４（ｆ）のように、長尺の補修管１の内部全長に
厚くて均一な樹脂膜Ｂを形成するように１次ライニング
して終了し、仕上し易いものとなる。By repeating the third and subsequent linings in the same manner as described above, a large amount of the resin A required for thick film lining of the long repair pipe 1 is appropriately conveyed in the repair pipe 1 in a plurality of times. A large amount of the resin A is continuously and surely attached to the entire inner length of the long repair pipe 1. Then, as shown in FIG. 4 (f), the ball pig 4 finishes the primary lining so as to form a thick and uniform resin film B over the entire internal length of the repair pipe 1, and finishes easily. .
【００２７】次に、上述の１次ライニング終了後は、補
修管１から樹脂搬送装置２を取外すが、このとき補修管
１の内部全長の底にはワイヤ３が布設されており、この
ワイヤ３をピグ移動に利用できる。そこで管外部でワイ
ヤ３に図２の仕上げ装置３０の仕上げピグ３２と牽引装
置３１を取付けて、２次ライニングを行う。即ち、図４
（ｇ）のように補修管１の他方の牽引装置３１を作動
し、仕上げピグ３２を補修管１の一方から内部に挿入
し、且つその仕上げピグ３２をワイヤ３により牽引して
補修管１中を移動する。Next, after the completion of the above-mentioned primary lining, the resin conveying device 2 is removed from the repair pipe 1, and at this time, the wire 3 is laid on the bottom of the entire length of the inside of the repair pipe 1. Can be used to move pigs. Then, the finishing pig 32 and the pulling device 31 of the finishing device 30 of FIG. 2 are attached to the wire 3 outside the pipe, and the secondary lining is performed. That is, FIG.
As shown in (g), the other pulling device 31 of the repair pipe 1 is operated, the finishing pig 32 is inserted into the inside from one side of the repair pipe 1, and the finishing pig 32 is pulled by the wire 3 in the repair pipe 1. To move.
【００２８】すると仕上げピグ３２が１次ライニングに
よる樹脂膜Ｂ中をウィング３２ａでセンターリングした
状態で滑って移動し、そのウィング３２ａやワイヤ３の
跡を埋めたり、膜厚変化を少なくするように均される。
ここで仕上げピグ３２は目標とする膜厚と同一のクリア
ランスＣ２を有し、上述の１次ライニングにおいて樹脂
膜Ｂがその目標とする膜厚より若干厚くて略均一に形成
されているため、仕上げピグ３２のクリアランスＣ２に
より樹脂膜Ｂが、補修管１の全長にわたり高い精度で目
標とする膜厚にライニングして仕上げされる。これによ
り補修管１の全長の内面には、図４（ｇ）のように高粘
度樹脂による厚い塗膜Ｅが均一に形成され、この塗膜Ｅ
により管内面の腐食等を適確に埋めて補修される。Then, the finishing pig 32 slides and moves in the resin film B formed by the primary lining while being centered by the wings 32a to fill the traces of the wings 32a and the wires 3 and reduce the film thickness change. Be leveled.
Here, the finish pig 32 has the same clearance C2 as the target film thickness, and since the resin film B is formed slightly thicker than the target film thickness in the above-mentioned primary lining and is formed substantially uniformly, The clearance C2 of the pig 32 finishes the resin film B by lining it to a target film thickness over the entire length of the repair pipe 1 with high accuracy. As a result, a thick coating film E made of a high-viscosity resin is uniformly formed on the inner surface of the entire length of the repair pipe 1 as shown in FIG. 4 (g).
With this, the inner surface of the pipe is properly filled with corrosion and repaired.
【００２９】[0029]
【発明の効果】以上に説明したように本発明によると、
厚膜ライニングにおいて、１次ライニングでは、補修管
の内部に所定のクリアランスを有する球ピグを、ワイヤ
によりセンターリングして挿入するので、管内面に樹脂
膜を均一に形成することができ、このため膜厚変動が低
減して、所定量の樹脂を適確に付着すると共に仕上し易
くなる。As described above, according to the present invention,
In the thick film lining, in the primary lining, a spherical pig having a predetermined clearance is inserted into the repair pipe by centering it with a wire, so that the resin film can be uniformly formed on the inner surface of the pipe. The variation in film thickness is reduced, and a predetermined amount of resin can be properly adhered and the finish can be facilitated.
【００３０】また、先ずこのピグの前方に樹脂を充填
し、次いでピグを空気圧搬送してピグにより厚い樹脂膜
を形成しつつ樹脂搬送し、再び樹脂を充填して樹脂搬送
を繰返し、多量の樹脂を複数回に分けて長尺の補給管の
内部全長に搬送して厚い樹脂膜を形成する工法であるか
ら、長尺の補修管の内部に高粘度の多量の樹脂を確実に
搬送することができて、実用性が大きい。Further, first, the resin is filled in front of the pig, and then the pig is pneumatically conveyed to form the thick resin film, and the resin is conveyed again. Since this is a method of forming a thick resin film by transporting it over the entire length of the long supply pipe in multiple steps, it is possible to reliably transport a large amount of high-viscosity resin into the long repair pipe. It is done and has great practicality.
【００３１】２次ライニングでは、補修管の樹脂膜中に
仕上げピグを牽引移動して均し、補修管の内部全長に厚
い塗膜を形成する工法であるから、作業が容易である。
また１次ライニングの際のワイヤをピグ移動に利用する
ので、作業し易くなる。In the secondary lining, since the finishing pig is pulled and moved in the resin film of the repair pipe and leveled to form a thick coating film over the entire length of the inside of the repair pipe, the work is easy.
Further, since the wire is used for moving the pig during the primary lining, the work becomes easy.
【図１】本発明に係る厚膜ライニング工法の１次ライニ
ングに適した実施例を示す全体の構成図である。FIG. 1 is an overall configuration diagram showing an embodiment suitable for primary lining of a thick film lining method according to the present invention.
【図２】球ピグとワイヤの装着状態を示す断面図であ
る。FIG. 2 is a cross-sectional view showing a mounted state of a ball pig and a wire.
【図３】同厚膜ライニング工法の２次ライニングに適し
た実施例を示す全体の構成図である。FIG. 3 is an overall configuration diagram showing an embodiment suitable for secondary lining of the thick film lining method.
【図４】１次ライニングと２次ライニングの作用状態を
示す図である。FIG. 4 is a diagram showing a working state of a primary lining and a secondary lining.
１ 補修管 ３ ワイヤ ４ 球ピグ ３２ 仕上げピグ 1 Repair pipe 3 Wire 4 Ball pig 32 Finishing pig
Claims (4)
荒塗りの１次ライニングと、仕上げの２次ライニングで
形成する厚膜ライニング工法において、 １次ライニングでは、ライニング膜の設定厚と略同程度
の径を有するワイヤを補修管の始端開口部から終端開口
部に亘って該管路内面下に布設し、適当な量の樹脂を始
端開口部より管路内に導入し、補修管の内面との間に設
定厚に対応するクリアランスを有するピグを前記ワイヤ
の上に載せることで該ピグを管路内にセンタリングして
導入し、次いでピグを空気圧搬送して管路内面に厚い樹
脂膜を形成しつつ樹脂搬送し、搬送完了後再び樹脂を始
端開口部より管路内に導入して樹脂搬送を繰返すことで
多量の樹脂を複数回に分けて長尺の補修管の内部全長に
搬送して厚い樹脂膜を形成し、 ２次ライニングでは、補修管内に仕上げピグを牽引移動
して１次ライニングで形成した厚い樹脂膜を均し、補修
管の内部全長に厚い塗膜を形成することを特徴とする厚
膜ライニング工法。1. A coating film of a set thickness is formed on the inner surface of a long repair pipe,
In the thick film lining method that is formed by rough coating primary lining and finishing secondary lining, in the primary lining, a wire having a diameter approximately equal to the set thickness of the lining film is terminated from the opening end of the repair pipe. A pig having a clearance corresponding to the set thickness is provided between the inner surface of the repair pipe and the pipe, which is laid under the inner surface of the pipe over the opening, and an appropriate amount of resin is introduced into the pipe through the opening at the start end. When the pig is placed on the wire, the pig is centered and introduced into the pipeline, and then the pig is pneumatically conveyed to form a thick resin film on the inner surface of the pipeline to convey the resin. By introducing the resin into the pipe from the section and repeating the resin conveyance, a large amount of resin is divided into multiple times and conveyed over the entire length of the inside of the long repair pipe to form a thick resin film. Tow the finishing pig to move Leveling a thick resin film formed in the primary lining Te, thick lining method and forming a thick coating film inside the entire length of the repair tube.
部にランチャーを取付け、このランチャーに樹脂注入タ
ンクをコンプレッサにより加圧して樹脂を注入するよう
に構成してライニングすることを特徴とする請求項１記
載の厚膜ライニング工法。2. The primary lining is characterized in that a launcher is attached to one end opening of the repair pipe, and a resin injection tank is pressurized by a compressor to inject the resin into the launcher for lining. Item 3. The thick film lining method according to Item 1.
との両方を備えるものとし、加圧機能により樹脂を注入
し、樹脂注入完了後に減圧機能でピグを引き戻すように
構成してライニングすることを特徴とする請求項１また
は２記載の厚膜ライニング工法。3. The compressor is provided with both a pressurizing function and a depressurizing function, the resin is injected by the pressurizing function, and the pig is pulled back by the depressurizing function after the resin injection is completed. The thick film lining method according to claim 1 or 2.
設されるワイヤの一方に仕上げピグを連結し、他方に牽
引装置を連結してライニングすることを特徴とする請求
項１記載の厚膜ライニング工法。4. The thick film according to claim 1, wherein in the secondary lining, a finishing pig is connected to one of the wires laid inside the repair pipe and a traction device is connected to the other of the wires. Lining method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12248694A JP3352816B2 (en) | 1994-06-03 | 1994-06-03 | Thick film lining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12248694A JP3352816B2 (en) | 1994-06-03 | 1994-06-03 | Thick film lining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07328537A true JPH07328537A (en) | 1995-12-19 |
| JP3352816B2 JP3352816B2 (en) | 2002-12-03 |
Family
ID=14837044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12248694A Expired - Fee Related JP3352816B2 (en) | 1994-06-03 | 1994-06-03 | Thick film lining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3352816B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150448A (en) * | 2007-12-19 | 2009-07-09 | Kanto Natural Gas Development Co Ltd | Piping system, and manufacturing device, manufacturing method and repairing method thereof |
-
1994
- 1994-06-03 JP JP12248694A patent/JP3352816B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150448A (en) * | 2007-12-19 | 2009-07-09 | Kanto Natural Gas Development Co Ltd | Piping system, and manufacturing device, manufacturing method and repairing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3352816B2 (en) | 2002-12-03 |
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