JPH0141104B2 - - Google Patents
Info
- Publication number
- JPH0141104B2 JPH0141104B2 JP19545883A JP19545883A JPH0141104B2 JP H0141104 B2 JPH0141104 B2 JP H0141104B2 JP 19545883 A JP19545883 A JP 19545883A JP 19545883 A JP19545883 A JP 19545883A JP H0141104 B2 JPH0141104 B2 JP H0141104B2
- Authority
- JP
- Japan
- Prior art keywords
- pig
- resin
- lining
- pipe
- pigs
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 39
- 239000011347 resin Substances 0.000 claims description 39
- 241000282887 Suidae Species 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 4
- 101100129922 Caenorhabditis elegans pig-1 gene Proteins 0.000 description 11
- 101100520057 Drosophila melanogaster Pig1 gene Proteins 0.000 description 11
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、主として地下に埋設された管路など
の既設管の管内面を補修するための既設管の管内
面補修方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for repairing the inner surface of an existing pipe, mainly for repairing the inner surface of an existing pipe such as a conduit buried underground.
［従来の技術］
既設の管路などを、埋設状態のままで内面に樹
脂ライニングを施し、腐蝕に対する耐久性、耐圧
性を向上し、補修する工法が知られている。[Prior Art] There is a known method of repairing existing pipelines by applying resin lining to the inner surface of the pipes while they are still buried to improve their durability against corrosion and pressure resistance.
ここでは、既設管内にピグを通し、牽引索でピ
グを引きながら、ピグの前側に溜めたコーテイン
グ用樹脂を、ピグと既設管内壁とのクリアランス
によつて管壁にコーテイングしている。 Here, a pig is passed through an existing pipe, and while the pig is pulled by a towing cable, the coating resin collected on the front side of the pig is coated on the pipe wall using the clearance between the pig and the inner wall of the existing pipe.
［発明が解決しようとする問題点］
この場合に問題になるのは、ライニング初期と
終期とではライニング層の厚さが相違することで
ある。すなわち、ライニング初期には、ピグの前
側にある樹脂量が多く、これが既設管内壁に接し
て生じる粘性抵抗で、牽引索を引く時にピグにか
かる負荷が大きく、ピグは既設管とのクリアラン
スを通る樹脂の圧力で径方向に縮小されて、ライ
ニング層が厚くなるが、反対に終期になると、ピ
グの前側にある樹脂量が減少し、クリアランスを
通る樹脂の圧力が低下し、ピグは径方向に復元し
ていつて、ライニング層が薄くなる。とくに、既
設管の１回のライニング長さが100ｍ〜200ｍと長
くなる時にはこの影響が著しくなる。[Problems to be Solved by the Invention] The problem in this case is that the thickness of the lining layer is different between the initial stage and the final stage of lining. In other words, in the early stage of lining, there is a large amount of resin on the front side of the pig, and this creates viscous resistance when it comes into contact with the inner wall of the existing pipe, and the load on the pig when pulling the tow rope is large, causing the pig to pass through the clearance with the existing pipe. The pressure of the resin causes it to shrink in the radial direction, making the lining layer thicker, but in the final stage, the amount of resin on the front side of the pig decreases, the pressure of the resin passing through the clearance decreases, and the pig shrinks in the radial direction. After restoration, the lining layer becomes thinner. In particular, this effect becomes significant when the length of one lining of the existing pipe becomes as long as 100 m to 200 m.
［問題点を解決するための手段］
本発明は、上記事情にもとづいてなされたもの
で、牽引索に対してタンデムに複数のピグを設け
て、ピグ径を、後方に行くに従つて小径とし、所
期目的のライニング層を得るためのクリアランス
に近づけておき、複数段のピグの通過で、全体と
してはライニング層の厚さを均一化できるように
した既設管の管内面補修方法を提供しようとする
ものである。[Means for Solving the Problems] The present invention has been made based on the above-mentioned circumstances, and includes providing a plurality of pigs in tandem with respect to the tow rope, and reducing the diameter of the pigs toward the rear. We would like to provide a method for repairing the inner surface of an existing pipe in which the thickness of the lining layer can be made uniform as a whole by keeping the pipe close to the clearance needed to obtain the desired lining layer and passing through multiple stages of pigs. That is.
この目的のため、本発明は、管内にピグを配置
し、上記ピグを牽引索で牽引して、ピグ周面と管
内壁とのクリアランスで、ピグ前にあるライニン
グ用樹脂を管内壁にライニングするものにおい
て、上記ピグを牽引索に複数個タンデムに連繋し
てなり、前方のピグより後方のピグが小径となる
ように設定し、最前段のピグの前にライニング用
樹脂を配設して牽引索を牽引し、ライニングを行
うことを特徴とするものである。 For this purpose, the present invention arranges a pig in a pipe, pulls the pig with a towing cable, and lines the inner wall of the pipe with a lining resin in front of the pig with a clearance between the circumferential surface of the pig and the inner wall of the pipe. In a vehicle, a plurality of the above pigs are connected in tandem to a towing line, and the rear pig is set to have a smaller diameter than the front pig, and a lining resin is placed in front of the frontmost pig. It is characterized by pulling the rope and lining it.
［実施例］
以下、本発明の一実施例を図面を参照して具体
的に説明する。図において、符号１，２，３は、
例えば、ネオプレンスポンジなどよりなるピグ本
体４０の前後端に硬質のゴム材料よりなる支持部
材４１，４２を設け、更にその前後に取付け部材
４３，４４を取付けたものであり、この取付け部
材４３，４４は、クランプ付カラーによつてワイ
ヤーなどの牽引索５が、各ピグ４，２，３を貫通
した状態で取付固定されている。そして、各ピグ
１，２，３はそれぞれ、径D1，D2，D3の胴部を
具備しており、相互の関係はD1＞D2＞D3になつ
ている。[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings. In the figure, symbols 1, 2, and 3 are
For example, support members 41 and 42 made of a hard rubber material are provided at the front and rear ends of a pig body 40 made of neoprene sponge, etc., and mounting members 43 and 44 are further mounted on the front and rear of the support members 41 and 42. A towing line 5 such as a wire is attached and fixed by a collar with a clamp while passing through each of the pigs 4, 2, and 3. Each of the pigs 1, 2, and 3 has a body portion having a diameter D 1 , D 2 , D 3 , and the relationship between the pigs 1 , 2 , and 3 is D 1 >D 2 >D 3 .
このような構成で牽引索５にタンデムに連結さ
れたピグ１，２，３による既設管６に対する樹脂
ライニングの状況を次に順次説明する。 The situation in which the existing pipe 6 is lined with resin by the pigs 1, 2, and 3 connected in tandem to the tow rope 5 in this configuration will be sequentially explained below.
［ライニング所期］（第２図参照）
ライニングの初期には、第１ピグ１の前側には
多量のライニング用樹脂がある。例えば150ｍの
80ｍ／ｍ既設管に２〜３ｍ／ｍのライニング層を
形成するためには、既設管６内におけるピグ１前
方の長さで15〜23ｍに亘つてライニング用樹脂が
用意される。このため、既設管６内壁に対する樹
脂の粘性抵抗で、ピグ１と既設管６内壁とのクリ
アランスにかかる樹脂圧は最大であり、ピグ１は
径方向に縮小されD1−minとなる。これはピグ２
のD2より小径の状態であり、ピグ１が通過した
後の樹脂層の厚さはtmaxである。一方、ピグ２
の前には、進行に伴つて、ピグ１の周壁を越えた
余剰の樹脂が溜りはじめ、管壁との粘性抵抗を漸
次上昇させるので、ピグ２と既設管６内壁とのク
リアランスにかかる樹脂圧を上げ、ピグ２も径方
向に若干縮小され、D2−med1状態となる。この
場合、D2−med1≒D3であり、ピグ３はならし効
果をあげて、適正厚さtpの樹脂層を後方に残す。[Intended lining] (See Figure 2) At the beginning of lining, there is a large amount of lining resin on the front side of the first pig 1. For example, 150m
In order to form a lining layer of 2 to 3 m/m on an 80 m/m existing pipe, lining resin is prepared over a length of 15 to 23 m in front of the pig 1 in the existing pipe 6. Therefore, due to the viscous resistance of the resin against the inner wall of the existing pipe 6, the resin pressure applied to the clearance between the pig 1 and the inner wall of the existing pipe 6 is maximum, and the pig 1 is reduced in the radial direction to D 1 -min. This is Pig 2
The diameter of the resin layer after the pig 1 has passed is tmax. On the other hand, Pig 2
As the pig progresses, excess resin that has exceeded the peripheral wall of the pig 1 begins to accumulate in front of the pipe, gradually increasing the viscous resistance with the pipe wall, so that the resin pressure applied to the clearance between the pig 2 and the inner wall of the existing pipe 6 increases. is raised, and pig 2 is also slightly reduced in the radial direction, resulting in a D 2 -med 1 state. In this case, D 2 -med 1 ≈D 3 , and the pig 3 has a leveling effect, leaving a resin layer with an appropriate thickness tp behind.
［ライニング中期］（第３図参照）
ライニングの中期には、第１ピグ１前の樹脂量
は半減され、ピグ１と管壁との間のクリアランス
における樹脂圧は初期よりも低下しており、ピグ
１の径D1はD1−med（＜D1−max）の状態になつ
ている。この時期には第２ピグ２の前の樹脂量は
可成り多くなり、ピグ２と管壁との間のクリアラ
ンスにおける樹脂圧は高く、このため、その径
D2はD2−minになる。このため、D2−min＜D3
であり、ピグ２後方では予定より若干、樹脂層が
厚くなる。これはピグ３によつてならされ、ピグ
３の後方では適正厚さtpの樹脂層となる。この時
の余剰の樹脂がピグ３の前に溜りはじめる。[Middle stage of lining] (See Figure 3) In the middle stage of lining, the amount of resin in front of the first pig 1 is halved, and the resin pressure in the clearance between the pig 1 and the pipe wall is lower than in the initial stage. The diameter D 1 of the pig 1 is D 1 −med (<D 1 −max). At this stage, the amount of resin in front of the second pig 2 has increased considerably, and the resin pressure in the clearance between the pig 2 and the pipe wall is high, which causes its diameter to increase.
D 2 becomes D 2 −min. Therefore, D 2 −min＜D 3
Therefore, the resin layer behind Pig 2 is slightly thicker than planned. This is leveled by the pig 3, and behind the pig 3 there is a resin layer with an appropriate thickness tp. Excess resin at this time begins to accumulate in front of pig 3.
［ライニング終期］（第４図参照）
ライニング終期には、第１ピグ１前の樹脂量は
減少し、ピグ１と管壁との間のクリアランスにお
ける樹脂圧は最低となるので、ピグ１の径D1は
D1−max（≒D1）の状態となる。この時期には第
２ピグ２の前の樹脂量も減少していて、ピグ２の
径はD2−med2＞D3（＜D2）となり、その後方の
樹脂厚は予定より薄いものとなる。しかし、第３
のピグ３の前には余剰樹脂が相当量たまつている
ので、これがピグ３と管壁との間のクリアランス
を通つて厚みを補填するので、適正厚さ大口の樹
脂層を後方に残す。厳密には、ピグ３の前の樹脂
量が増せば、ピグ３は縮径されるはずであるが、
余剰樹脂量は、大きく縮径するほどの粘性抵抗を
持つほど多量にはならないので、若干の縮径があ
つても、その時の樹脂層の厚さtp′はtp′≒tpであ
り、実際上の問題にはならない。[Final stage of lining] (See Figure 4) At the final stage of lining, the amount of resin in front of the first pig 1 decreases, and the resin pressure in the clearance between the pig 1 and the pipe wall becomes the lowest, so the diameter of the pig 1 decreases. D1 is
The state is D 1 −max (≒D 1 ). At this time, the amount of resin in front of the second pig 2 was also decreasing, and the diameter of the pig 2 became D 2 −med 2 >D 3 (<D 2 ), and the resin thickness behind it was thinner than planned. Become. However, the third
A considerable amount of surplus resin has accumulated in front of the pig 3, and this passes through the clearance between the pig 3 and the pipe wall to compensate for the thickness, leaving a large resin layer with an appropriate thickness behind. Strictly speaking, if the amount of resin in front of the pig 3 increases, the diameter of the pig 3 should be reduced.
The amount of surplus resin will not be large enough to have enough viscous resistance to cause a large diameter reduction, so even if there is a slight diameter reduction, the thickness tp' of the resin layer at that time will be tp'≒tp, and in practice It's not a problem.
もし、余剰樹脂量がこの厚さtp′に大きく影響
するほどの条件ならば、ピグ数を増して、この問
題を解消すればよい。 If the conditions are such that the amount of excess resin greatly affects this thickness tp', the problem can be solved by increasing the number of pigs.
［発明の効果］
本発明は、以上詳述したように、径の異なるピ
グを幾つか通すことで、各ピグ前の樹脂量で厚さ
制御をしながら、実質的に、初期から終期まで、
均一な既設管内壁への樹脂ライニングを達成でき
るのであり、構成的には、単純なピグの連結で解
決するという利点がある。[Effects of the Invention] As detailed above, the present invention allows the resin to be coated from the initial stage to the final stage while controlling the thickness by adjusting the amount of resin in front of each pig by passing several pigs with different diameters.
It is possible to achieve uniform resin lining on the inner wall of the existing pipe, and there is an advantage in terms of structure that it can be solved by simply connecting pigs.
第１図は本発明の一実施例を示す一部縦断した
側面図、第２図ないし第４図は使用態様を示す側
面図である。
１，２，３……ピグ、４０……ピグ本体、４
１，４２……支持部材、４３，４４……取付部
材、５……牽引索、６……既設管。
FIG. 1 is a partially longitudinal side view showing an embodiment of the present invention, and FIGS. 2 to 4 are side views showing how it is used. 1, 2, 3...Pig, 40...Pig body, 4
1, 42... Support member, 43, 44... Mounting member, 5... Traction cable, 6... Existing pipe.
Claims (1)
引して、ピグ周面と管内壁とのクリアランスで、
ピグ前にあるライニング用樹脂を管内壁にライニ
ングするものにおいて、 上記ピグを牽引索に複数個タンデムに連繋して
なり、前方のピグより後方のピグが小径となるよ
うに設定し、最前段のピグの前にライニング用樹
脂を配設して牽引索を牽引し、ライニングを行う
ことを特徴とする既設管の管内面補修方法。[Claims] 1. A pig is placed in a pipe, the pig is pulled by a towing cable, and the clearance between the circumferential surface of the pig and the inner wall of the pipe is
In the case of lining the inner wall of the pipe with the lining resin in front of the pig, a plurality of the above pigs are connected in tandem to a towing line, and the pigs at the rear are set to have a smaller diameter than the pigs at the front, and the pigs at the front stage are set to have a smaller diameter. A method for repairing the inner surface of an existing pipe, characterized by arranging a lining resin in front of a pig, pulling a tow cable, and lining the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19545883A JPS6087881A (en) | 1983-10-19 | 1983-10-19 | Method for repairing inside of installed pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19545883A JPS6087881A (en) | 1983-10-19 | 1983-10-19 | Method for repairing inside of installed pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6087881A JPS6087881A (en) | 1985-05-17 |
| JPH0141104B2 true JPH0141104B2 (en) | 1989-09-04 |
Family
ID=16341402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19545883A Granted JPS6087881A (en) | 1983-10-19 | 1983-10-19 | Method for repairing inside of installed pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6087881A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2381057B (en) * | 2001-10-19 | 2004-09-08 | Heerema Marine Contractors Nl | Improvements in or relating to methods of fitting linings in pipelines |
-
1983
- 1983-10-19 JP JP19545883A patent/JPS6087881A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6087881A (en) | 1985-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |