JPH0411271B2 - - Google Patents
Info
- Publication number
- JPH0411271B2 JPH0411271B2 JP62110149A JP11014987A JPH0411271B2 JP H0411271 B2 JPH0411271 B2 JP H0411271B2 JP 62110149 A JP62110149 A JP 62110149A JP 11014987 A JP11014987 A JP 11014987A JP H0411271 B2 JPH0411271 B2 JP H0411271B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- branch
- pig
- branch pipe
- pipe
- 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
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- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、埋設水道管路やガス管路の更生に利
用されるものであり、分岐管路内壁面に形成した
ライニング塗膜の整形工法の改良に関するもので
ある。Detailed Description of the Invention (Field of Industrial Application) The present invention is used for the rehabilitation of buried water pipes and gas pipes, and is a method for shaping a lining coating film formed on the inner wall surface of a branch pipe. This is related to the improvement of.
（従来の技術）
塗料と搬送用気流との混合流体を管路内へ吹き
込み、管路内壁面に付着積層せしめた塗料を内壁
面に沿つて流動させるようにした所謂気流式ライ
ニング工法は、ガス管路や水道管路の更生に広く
利用されている（特公昭58−24195号、特公昭58
−13226号等）。(Prior art) The so-called pneumatic lining method, in which a mixed fluid of paint and a conveying air stream is blown into the pipe, and the paint layered on the inner wall of the pipe flows along the inner wall, is It is widely used for the rehabilitation of pipelines and water pipes (Special Publication No. 1984-24195, Special Publication No. 1983)
−13226, etc.).
第２図は、前記気流式ライニング工法による分
岐管路のライニングの一例を示すものである。ラ
イニング処理に際しては、先ず、処理すべき分岐
管路の主管路Ａの一方の開口端A0に混合噴射器
１を、また他方の開口端A0′にバルブV1と塗料回
収器D1を夫々接続し、更に、枝管路Ｂの開口端
B0にバルブV2と塗料回収器D2を、また枝管部Ｃ
の開口端C0にバルブV3と塗料回収器D3を夫々接
続する。 FIG. 2 shows an example of lining a branch pipe using the air flow lining method. During the lining process, first, a mixing injector 1 is installed at one open end A 0 of the main pipeline A of the branch pipeline to be treated, and a valve V 1 and a paint collector D 1 are installed at the other open end A 0 '. and further connect the open end of branch pipe B.
Connect valve V 2 and paint collector D 2 to B 0 , and branch pipe C.
Connect the valve V 3 and the paint collector D 3 to the open end C 0 of the valve V 3 and the paint collector D 3 , respectively.
次にコンプレツサー（図示省略）及び塗料供給
装置（図示省略）を起動し、バルブV2を開、バ
ルブV1，V3を閉にして塗料２と圧縮空気３を混
合噴射器１へ送り、混合流体４を管路A1−Ｂ間
へ流通させることにより、枝管部Ｂのライニング
を行なう。その後、バルブV1，V2を閉、バルブ
V3を開にし、管路A2−Ｃ間へ混合流体４を流通
させて枝管部Ｃをライニングし、最後にバルブ
V2，V3を閉、バルブV1を開にして管路A3をライ
ニングする。 Next, start the compressor (not shown) and paint supply device (not shown), open valve V 2 , close valves V 1 and V 3 , and send paint 2 and compressed air 3 to mixing injector 1 to mix. The branch pipe section B is lined by flowing the fluid 4 between the pipes A1 and B. After that, close valves V 1 and V 2 , and close valves
V 3 is opened, mixed fluid 4 flows between pipes A 2 and C, branch pipe C is lined, and finally the valve is
V 2 and V 3 are closed, valve V 1 is opened and conduit A 3 is lined.
而して、上述の如き工法によりライニングを行
つた場合には、塗膜厚さが管路の全長に亘つて均
一になり難く、主管部Ａの開口端A0側や枝管の
分岐部T1，T2枝管部の末端開口部等に於いて、
塗膜厚さに著しい斑が発生する。 Therefore, when lining is performed using the method described above, it is difficult to make the coating film uniform over the entire length of the pipe, and it is difficult to make the coating film uniform over the entire length of the pipe, and it is difficult to make the coating film uniform over the entire length of the pipe. 1 , T2 At the end opening of the branch pipe, etc.
Significant unevenness occurs in the coating thickness.
また、形成した塗膜の外表面には、塗料の垂れ
下り等による凹凸や搬送用気流による皺が多数存
在し、このまま塗膜を乾燥硬化させた場合には、
通水抵抗の増加やスケールの早期固着等の点で多
くの不都合が起生する。 In addition, the outer surface of the formed coating film has many irregularities caused by dripping of the paint and wrinkles caused by the conveying air current, and if the coating film is dried and cured as it is,
Many inconveniences occur in terms of increased water flow resistance and early scale fixation.
尚、上記は、所謂気流式ライニング工法により
塗膜を形成した場合についての説明であるが、管
内へ蓄層せしめた高粘性の塗料を流動させること
により、ライニング塗膜を形成するようにした所
謂液相式ライニングの場合に於いても、全く同様
である。 The above is an explanation of a case in which a coating film is formed by the so-called airflow lining method, but a so-called lining coating film is formed by flowing a highly viscous paint layered inside a pipe. The same applies to liquid phase lining.
従つて、通常は、第３図に示す如く、ライニン
グ塗膜２ａを形成したあと、塗膜が硬化する迄
に、整形用ピグ５を圧縮空気によつて移動させ、
塗膜厚さの修正と、塗膜外表面の整形（平滑化）
を行なう様にしている。 Therefore, as shown in FIG. 3, after forming the lining coating film 2a, until the coating film is cured, the shaping pig 5 is moved by compressed air.
Correction of paint film thickness and shaping (smoothing) of the outer surface of the paint film
I am trying to do this.
即ち、主管部A1と枝管部Ｂの整形を行なう場
合には、バルブV1，V3を閉、バルブV2を開にし
て圧縮空気３を加え、ピグ５を前方へ移動させ
る。ピグ５は、管路A2，A3，Ｃが閉塞されてい
るため、直行することは少なく、通常は枝管部Ｂ
内へ進行して行く。 That is, when shaping the main pipe section A1 and the branch pipe section B, valves V1 and V3 are closed, valve V2 is opened, compressed air 3 is applied, and the pig 5 is moved forward. Since the pipes A 2 , A 3 , and C are blocked, the pig 5 rarely goes directly to the branch pipe section B.
Go inward.
しかし、分岐部T1に於ける整形用ピグ５の運
動は、第３図の点線で示す如く５ａ，５ｂ，５ｃ
の位置を経て枝管部Ｂ内へ進行して行く。即ち、
ピグ５の分岐部T1に於ける運動は、一方向への
連続的な運動にならず、その結果、分岐部T1の
内壁面の塗膜が十分に整形されないという問題が
ある。 However, the movement of the shaping pig 5 at the branching part T1 is as shown by the dotted line in FIG.
It progresses into the branch pipe section B through the position . That is,
The movement of the pig 5 at the branch part T1 is not continuous in one direction, and as a result, there is a problem that the coating film on the inner wall surface of the branch part T1 is not sufficiently shaped.
また、管路A2，A3，Ｃの空間容積が大きくな
ると、内部空気の圧縮によつてピグ５が前記５ｂ
の位置を越え、管路A2内へ填り込むことが屡々
ある。この様な場合には、ピグ５が円滑に枝管部
Ｂ内へ進行せず、作業能率が著しく悪化する。 Moreover, when the space volume of the pipes A 2 , A 3 , and C becomes large, the pig 5 is moved to the above-mentioned 5 b by the compression of the internal air.
It often happens that the pipe exceeds the position of , and gets stuck inside the pipe A2 . In such a case, the pig 5 does not advance smoothly into the branch pipe section B, resulting in a significant deterioration of work efficiency.
（発明が解決しようとする問題点）
本発明は、従前の分岐管路のライニング塗膜の
整形に於ける上述の如き問題、即ち、分岐部に
於けるピグの運転が連続的でなく、塗膜が十分に
整形されてないこと、及びピグが円滑に枝管部
内へ進行しないことがあり、作業能率が低下した
り、ピグの取出しの間に塗料が硬化して未整形部
分が残り易いこと、等の問題を解決せんとするも
のであり、分岐管路の全亘長に亘つて、管路内壁
面の塗膜を均一に、しかも高能率で整形できるよ
うにした塗膜整形方法を提供するものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems in the conventional shaping of the lining coating film of branch pipes, that is, the operation of the pig at the branch part is not continuous, and the coating film is not continuous. The membrane may not be properly shaped, and the pig may not advance smoothly into the branch pipe, reducing work efficiency, and the paint may harden during removal of the pig, leaving unshaped areas. , etc., and provides a coating film shaping method that can uniformly and highly efficiently shape the coating film on the inner wall of the pipeline over the entire length of the branch pipeline. It is something to do.
（問題点を解決するための手段）
本件発明は、ライニング塗膜を形成した直後の
主管路と複数の枝管路から成る分岐管路の主管路
内へ整形用ピグを挿入すると共に、塗膜の整形を
行なう枝管部より下流側に位置する枝管部の少な
くとも一つの末端開口を僅かに開放し、前記塗膜
整形を行なう枝管部の末端開口から分岐管路内の
気体を排気して枝管部の分岐部に主管路から枝管
部へ向う気流を形成すると共に、前記整形用ピグ
の後方より圧縮気体を供給してピグを前進させる
ことを発明の基体構成とするものである。(Means for Solving the Problem) The present invention involves inserting a shaping pig into the main pipe of a branch pipe consisting of a main pipe and a plurality of branch pipes immediately after forming a lining coating film, and At least one end opening of the branch pipe section located downstream of the branch pipe section where the coating film shaping is performed is slightly opened, and gas in the branch pipe line is exhausted from the end opening of the branch pipe section where the coating film shaping is performed. The base structure of the invention is to form an airflow from the main pipe toward the branch pipe at the branch part of the branch pipe, and to supply compressed gas from the rear of the shaping pig to move the pig forward. .
（作用）
分岐管路内へ挿入した整形用ピグは、後方から
加えた圧縮空気体によつて押圧され、順次前方へ
移動する。ピグと管内壁面に形成された塗膜との
間は、機密に近い状態になつており、ピグの前進
によつて塗膜の外表面が均らされ、平滑な外表面
に整形される。(Function) The shaping pig inserted into the branch pipe is pressed by the compressed air applied from the rear and sequentially moves forward. The space between the pig and the coating film formed on the inner wall surface of the pipe is almost airtight, and as the pig advances, the outer surface of the coating film is leveled and shaped into a smooth outer surface.
また、塗膜の厚い部分は、ピグによつて塗料が
前方へ押し流され、塗膜の厚みが均一化されるこ
とになる。 Further, in thick parts of the paint film, the paint is swept forward by the pig, making the thickness of the paint film uniform.
一方、整形すべき枝管部の末端開口からは、そ
の下流側の開口から流れ込んだ空気が連続的に排
気されており、枝管の分岐部に於いては、主管部
から枝管部へ向う気流が流れている。その結果、
分岐部まて進行して来た整形用ピグは、直進する
ことなく極めて円滑に枝管部内へ進行し、枝管部
壁内面の塗膜を均らし乍らその開口端に到達す
る。 On the other hand, from the terminal opening of the branch pipe to be shaped, air that has flowed in from the downstream opening is continuously exhausted, and at the branching part of the branch pipe, air flows from the main pipe to the branch pipe. Air current is flowing. the result,
The shaping pig that has advanced to the branch part moves very smoothly into the branch pipe part without going straight, and reaches the open end of the branch pipe part while leveling the coating film on the inner surface of the wall of the branch pipe part.
（実施例）
以下、本発明の一実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of the present invention will be described based on the drawings.
第１図は本発明の実施系統図であり、前記第２
図及び第３図と同一部位には、同一参照番号が付
されている。 FIG. 1 is an implementation system diagram of the present invention, and the second
The same parts as in the figures and FIG. 3 are given the same reference numbers.
分岐管路内壁面のライニング処理が終れば、第
１図に示す如く主管部A1の一側開口A0からライ
ニング用ピグ５を管路１内へ挿入する。また、塗
膜２ａの整形処理を行なう枝管部Ｂの末端開口
B0に、排気装置（空気エゼクター６）を接続す
ると共に、これに作動用空気３′の供給ライン及
び塗料回収器D2を接続する。 When the lining treatment of the inner wall surface of the branch pipe is completed, the lining pig 5 is inserted into the pipe 1 through the opening A 0 on one side of the main pipe A 1 as shown in FIG. In addition, the terminal opening of the branch pipe portion B where the coating film 2a is shaped is
An exhaust system (air ejector 6) is connected to B 0 , and a supply line for working air 3' and a paint recovery device D 2 are connected to this.
尚、前記分岐管路のライニング塗膜２ａは、如
何なる工法で形成してもよいことは勿論であり、
気流法や液相法（特開昭62−23483号、特開昭62
−23484号等）が最適である。又、本実施例では
管路内の排気用に空気エゼクター６を使用してい
るが、真空ポンプ等を使用してもよい。更に、本
実施例では一基の空気エゼクター６のみを図示し
ているが、通常は各管路の末端A0′C0にも夫々予
かじめ配設されている。 It goes without saying that the lining coating film 2a of the branch pipe can be formed by any method.
Air flow method and liquid phase method (JP-A-62-23483, JP-A-62
-23484 etc.) is optimal. Further, in this embodiment, the air ejector 6 is used for exhausting the inside of the pipe, but a vacuum pump or the like may also be used. Further, although only one air ejector 6 is shown in this embodiment, it is normally provided in advance at each end A 0 'C 0 of each conduit.
次に、圧縮空気３を供給してピグ５を押圧前進
させると共に、作動用空気３′を供給して空気エ
ゼクター６を作動させ、管路内の空気を排気す
る。空気エゼクター６の作動により、管路の分岐
部T1には矢印で示す如き方向の気流が流れ、こ
れにより分岐部T1へ到達したピグ５は、極めて
円滑に枝管部Ｂ内へ進入する。 Next, compressed air 3 is supplied to push the pig 5 forward, and working air 3' is supplied to operate the air ejector 6 to exhaust the air in the pipe. Due to the operation of the air ejector 6, an air current flows in the direction shown by the arrow in the branch part T1 of the pipe, so that the pig 5 that has reached the branch part T1 enters the branch pipe part B very smoothly. .
前記整形用のピグ５は、管路内径から膜厚寸法
を差引いた外径の球形に形成されており、弾力性
を有するプラスチツク材等から形成されている。 The shaping pig 5 is formed into a spherical shape with an outer diameter calculated by subtracting the membrane thickness from the inner diameter of the pipe, and is made of a resilient plastic material or the like.
管路内へ挿入されたピグ５と管路内壁面との間
は、介存する未硬化の塗膜によつて機密状となつ
ており、圧縮空気３（１〜５Kg／cm2）の流量調整
によりその進行速度が調整され、約５〜30ｍ／分
の速度で前進する。先に形成されたライニング塗
膜２ａは、進行するピグによつてその外表面の凹
凸や皺が整形されると共に、局部的な厚膜部の塗
料は、前方へ順次延ばされて膜厚が均等化され
る。 The space between the pig 5 inserted into the pipe and the inner wall of the pipe is kept airtight by the intervening uncured coating film, and the flow rate of compressed air 3 (1 to 5 kg/cm 2 ) can be adjusted. Its advancing speed is adjusted by , and it moves forward at a speed of about 5 to 30 m/min. The previously formed lining coating film 2a has its outer surface roughened and wrinkled by the advancing pig, and the locally thick coating is sequentially extended forward to reduce the film thickness. Equalized.
ピグ５が分岐部Ｂの開口端B0に達すると、ピ
グ５を取り出して、再度これを開口端A0から管
路内へ挿入する。次に、バルブV2を閉、バルブ
V1を僅かに開とし、枝管部Ｃの末端開口C0に接
続した空気エゼクター（図示省略）を作動して管
路内を排気すると共に、圧縮空気３によりピグ５
を前進させ、管路A2−Ｃ間の塗膜を整形する。 When the pig 5 reaches the open end B 0 of the branch B, the pig 5 is taken out and inserted again into the pipe from the open end A 0 . Then close valve V 2 , valve
V 1 is slightly opened and the air ejector (not shown) connected to the end opening C 0 of the branch pipe C is operated to exhaust the inside of the pipe, and the compressed air 3 is used to remove the pig 5.
is advanced to shape the coating film between pipes A 2 and C.
枝管部Ｃの整形が終れば、同様にして管路A3
の塗膜を整形する。尚、本実施例では、１個のピ
グ５を繰り返し使用するようにしているが、新し
いピグ５を順次開口端A0から送り込むようにし
てもよい。 Once the branch pipe section C has been shaped, pipe A 3
Shape the coating film. In this embodiment, one pig 5 is used repeatedly, but new pigs 5 may be sequentially fed from the open end A0 .
（発明の効果）
本発明では、ピグによる塗膜の整形に際し、整
形すべき枝管部の末端から排気を行なつて、主管
路から枝管部へ向う気流を発生するようにしてい
るため、整形用のビグが主管路から枝管部内へ円
滑に進行する。その結果、分岐部の塗膜が完全に
整形され、従前の如く分岐部の塗膜が極端に厚く
なつたり、或いは深い皺が残つたりすることが皆
無になる。(Effects of the Invention) In the present invention, when shaping a coating film using a pig, exhaust air is discharged from the end of the branch pipe section to be shaped to generate an airflow from the main pipe line to the branch pipe section. The vig for shaping smoothly advances from the main pipe into the branch pipe. As a result, the coating film at the branching portion is perfectly shaped, and there is no longer any possibility that the coating film at the branching portion will become extremely thick or leave deep wrinkles as was the case in the past.
また、ピグが枝管部を越えて直進し過ぎること
も皆無となり、所謂ピグの嵌り込みによる作業ト
ラブルが無くなつて、ライニング処理能率が大幅
に向上する。 In addition, the pig never goes straight beyond the branch pipe portion, eliminating work troubles caused by so-called pigs getting stuck, and lining processing efficiency is greatly improved.
本発明は上述の通り優れた実用的効用を奏する
ものである。 As described above, the present invention has excellent practical effects.
第１図は、本発明の一実施例を示す説明図であ
る。第２図は、分岐管路のライニングと塗膜整形
の説明図であり、第３図は、従前のライニング塗
膜の整形に於けるピグの移動状態の説明図であ
る。
２ａ……ライニング塗膜、３……圧縮気体、５
……整形用ピグ、６……排気装置、Ａ……主管
部、Ｂ，Ｃ……枝管部、Ｔ……分岐部、Ｄ……塗
料回収器、Ｖ……バルブ。
FIG. 1 is an explanatory diagram showing one embodiment of the present invention. FIG. 2 is an explanatory diagram of the lining of a branch pipe and the shaping of the coating film, and FIG. 3 is an explanatory diagram of the moving state of the pig in the conventional shaping of the lining coating film. 2a... Lining coating film, 3... Compressed gas, 5
...Pig for shaping, 6...Exhaust system, A...Main pipe section, B, C...Branch pipe section, T...Branch section, D...Paint collector, V...Valve.
Claims (1)
数の枝管路から成る分岐管路の主管路内へ整形用
ピグを挿入すると共に、塗膜の整形を行なう枝管
部より下流側に位置する枝管路の少なくとも一つ
の末端開口を僅かに開放し、前記塗膜整形を行な
う枝管部の末端開口から分岐管路内の気体を排気
して枝管部の分岐部に主管路から枝管路へ向う気
流を形成すると共に、前記整形用ピグの後方より
圧縮気体を供給してピグを前進させることを特徴
とする分岐管路のライニング塗膜の整形方法。1. Immediately after forming the lining coating film, a shaping pig is inserted into the main pipeline of a branch pipeline consisting of a main pipeline and multiple branch pipelines, and is located downstream of the branch pipeline where the coating film is to be shaped. The end opening of at least one of the branch pipes is slightly opened, and the gas in the branch pipe is exhausted from the end opening of the branch pipe portion where the coating film is to be shaped, and the gas in the branch pipe is removed from the main pipe to the branch portion of the branch pipe portion. 1. A method for shaping a lining coating film of a branch pipe, characterized by forming an airflow toward the pipe and supplying compressed gas from behind the shaping pig to move the pig forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11014987A JPS63274474A (en) | 1987-05-06 | 1987-05-06 | Method for shaping branch pipe lining coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11014987A JPS63274474A (en) | 1987-05-06 | 1987-05-06 | Method for shaping branch pipe lining coating film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63274474A JPS63274474A (en) | 1988-11-11 |
| JPH0411271B2 true JPH0411271B2 (en) | 1992-02-27 |
Family
ID=14528289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11014987A Granted JPS63274474A (en) | 1987-05-06 | 1987-05-06 | Method for shaping branch pipe lining coating film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63274474A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172383A (en) * | 1984-02-17 | 1985-09-05 | Nitto Electric Ind Co Ltd | Method for painting inner surface of piping |
| JPS62266178A (en) * | 1986-05-14 | 1987-11-18 | Nippon Gijutsu Kaihatsu Center:Kk | Method for applying lining to inner wall surface of pipe |
-
1987
- 1987-05-06 JP JP11014987A patent/JPS63274474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63274474A (en) | 1988-11-11 |
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