JPH04349986A - Pipe cleaning device using pig - Google Patents
Pipe cleaning device using pigInfo
- Publication number
- JPH04349986A JPH04349986A JP3121525A JP12152591A JPH04349986A JP H04349986 A JPH04349986 A JP H04349986A JP 3121525 A JP3121525 A JP 3121525A JP 12152591 A JP12152591 A JP 12152591A JP H04349986 A JPH04349986 A JP H04349986A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- pig
- sewage
- water
- gate valve
- 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
- 238000004140 cleaning Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims description 6
- 239000010865 sewage Substances 0.000 description 28
- 239000013505 freshwater Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 241000282887 Suidae Species 0.000 description 2
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 2
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はピグを用いた管内洗浄装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning device using a pig.
【０００２】0002
【従来の技術】管路を利用した下水道においては、老朽
化にともない、管の内面にスケールなどが発生し、通水
量の低下などの不都合を引き起こす。そこで、このよう
なスケールなどの成長を防止するため、管内洗浄用のピ
グが使用されている。このピグは、発泡ポリウレタンな
どの軟質素材からなる砲弾形の材料にて構成され、これ
を管内に圧入した後にその後側に加圧状態の水を供給す
ることで管内を移動し、この移動に伴って管内面を洗浄
するものである。BACKGROUND OF THE INVENTION As sewer systems using pipes age, scale and the like develop on the inner surfaces of the pipes, causing inconveniences such as reduced water flow. Therefore, in order to prevent the growth of scale, etc., pigs are used to clean the inside of the pipe. This pig is made of a bullet-shaped material made of a soft material such as foamed polyurethane, and after being press-fitted into a pipe, it moves within the pipe by supplying pressurized water to the rear side, and as it moves, it moves inside the pipe. This is to clean the inner surface of the tube.
【０００３】従来、このピグ用いて管内面を洗浄する装
置として、たとえば実開昭６２−１４０９９３号公報に
開示されるように、管路の途中に開閉式のピグ挿入口を
設け、管内を流れる加圧状態の水でピグを後押しするこ
とで、このピグを移動させるようにしたものが知られて
いる。[0003] Conventionally, as a device for cleaning the inner surface of a pipe using this pig, as disclosed in, for example, Japanese Utility Model Application Publication No. 62-140993, an opening/closing type pig insertion opening is provided in the middle of the pipe line, and a pipe is used to clean the inner surface of the pipe. It is known that the pig is moved by backing it up with pressurized water.
【０００４】0004
【発明が解決しようとする課題】しかし、このような従
来のものでは、管内へのピグの挿入時に管路への通水を
停止しなければならず、著しく能率が悪いという問題点
がある。However, with such a conventional system, there is a problem in that the water flow to the pipe must be stopped when the pig is inserted into the pipe, and the efficiency is extremely low.
【０００５】そこで本発明はこのような問題点を解決し
、管内へのピグの挿入を容易に行えるようにすることを
目的とする。SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve these problems and to facilitate the insertion of a pig into a pipe.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
本発明は、管路における上流部分にこの管路からの分岐
部を設けて、この分岐部にピグの発射装置を取り付け、
前記分岐部よりも上流側における管路の部分からピグの
発射装置に向かうバイパス管を設けて、このバイパス管
内を通る加圧状態の水により前記ピグを管内に向けて発
射させるようにしたものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a branch part from the pipe line in the upstream part of the pipe line, attaches a pig launcher to this branch part,
A bypass pipe is provided from a portion of the pipe on the upstream side of the branch to a pig launcher, and pressurized water passing through the bypass pipe causes the pig to be launched into the pipe. be.
【０００７】[0007]
【作用】このようなものにおいて、管内を洗浄するとき
には、まず、バルブなどによって管内と発射装置との連
通を絶った状態で、この発射装置の内部にピグを挿入す
る。そして、その状態でバイパス管に前記管内からの加
圧状態の水を供給すれば、この加圧状態の水によってピ
グが管内に押し出される。その後は、この管内を流れる
加圧状態の水によって、ピグは管内を下流側へ移動され
、この管内を洗浄することになる。[Operation] When cleaning the inside of the tube in such a device, first, the communication between the inside of the tube and the firing device is cut off by a valve or the like, and then the pig is inserted into the inside of the firing device. In this state, if pressurized water from inside the pipe is supplied to the bypass pipe, the pressurized water will push the pig into the pipe. Thereafter, the pig is moved downstream in the pipe by the pressurized water flowing inside the pipe, thereby cleaning the inside of the pipe.
【０００８】[0008]
【実施例】図１において、１は下水管路であり、ポンプ
場に集められた下水を下水処理場まで圧送するために用
いられる。図１において、２はポンプ場内の集水ピット
、３は下水処理場内の集水ピットである。ポンプ場と下
水処理場との間では、一般に下水管路１は道路下に埋設
される。ポンプ場内の集水ピット２の近傍における下水
管路１の部分には、汚水圧送ポンプ４が設けられている
。またポンプ場内において、汚水圧送ポンプ４よりも下
流側における下水管路１の部分には、この管路を開閉す
るための仕切弁５が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a sewage pipe, which is used to forcefully convey sewage collected at a pumping station to a sewage treatment plant. In FIG. 1, 2 is a water collection pit in a pumping station, and 3 is a water collection pit in a sewage treatment plant. Between a pump station and a sewage treatment plant, the sewage pipe 1 is generally buried under the road. A sewage pressure pump 4 is provided in a portion of the sewage pipe 1 near the water collection pit 2 in the pumping station. Further, in the pumping station, a gate valve 5 for opening and closing the sewage pipe 1 is provided in a portion of the sewage pipe 1 on the downstream side of the sewage pressure pump 4.
【０００９】この仕切弁５よりも下流側における下水管
路１の部分には、Ｔ字管を利用した分岐部６が設けられ
ている。この分岐部６には、仕切弁７を介してピグ発射
装置８が接続されている。A branch portion 6 using a T-shaped pipe is provided in a portion of the sewer pipe 1 on the downstream side of the gate valve 5. A pig launcher 8 is connected to this branch 6 via a gate valve 7 .
【００１０】図２および図３に詳細に示すように、ピグ
発射装置８は分岐部６に接続される大径の本体胴部９を
有し、この本体胴部９は、分岐部６に向かうにつれ口径
が小さくなって下水管路１と同径となるような先細り状
に形成されている。分岐部６とは反対側における本体胴
部９の端部には開閉蓋１０が設けられており、この開閉
蓋１０を通してピグ１１を本体胴部９の内部へ挿入可能
である。１２は安全装置であり、開閉蓋１０を閉状態に
ロック可能である。As shown in detail in FIGS. 2 and 3, the pig launcher 8 has a large-diameter body body 9 connected to the branch 6; It is formed in a tapered shape so that the diameter becomes smaller as the diameter increases and becomes the same diameter as the sewer pipe 1. An opening/closing lid 10 is provided at the end of the body body 9 on the side opposite to the branching portion 6, and the pig 11 can be inserted into the interior of the body body 9 through this opening/closing lid 10. 12 is a safety device, which can lock the opening/closing lid 10 in a closed state.
【００１１】仕切弁５よりも上流側における下水管路１
の部分と、開閉蓋１０の近傍における本体胴部９の部分
との間には、バイパス管１３がわたされて、両者間を連
通させている。このバイパス管１３には、仕切弁１４が
設けられている。Sewer pipe 1 on the upstream side of gate valve 5
A bypass pipe 13 is provided between this portion and a portion of the main body body 9 near the opening/closing lid 10 to provide communication between the two. This bypass pipe 13 is provided with a gate valve 14 .
【００１２】本体胴部９において、開閉蓋１０の近傍に
は、加圧状態の清水の供給管１５が接続されている。こ
の供給管１５には、仕切弁１６と、逆止弁１７と、仕切
弁１８付きのエア抜き管１９とが取り付けられている。
供給管１５の近傍には、圧力計２０が取り付けられてい
る。また本体胴部９において、分岐部６との接続部分の
近傍に形成された同径部２１には、この同径部２１をピ
グ１１が通過したことを検知するためのピグ通過確認装
置２２と、仕切弁付きのドレン管２３とが設けられてい
る。図示は省略したが、ピグの確認装置は、下水管路１
における途中の部分と集水ピット３の近傍部分とにもそ
れぞれ設けられ、ピグ１１の進行を確認できるようにさ
れている。ドレン管２３は、パイプを用いて下水溝まで
導かれている。A pressurized fresh water supply pipe 15 is connected to the main body body 9 near the opening/closing lid 10. A gate valve 16, a check valve 17, and an air vent pipe 19 with a gate valve 18 are attached to the supply pipe 15. A pressure gauge 20 is attached near the supply pipe 15. In addition, in the main body body 9, the same diameter part 21 formed near the connecting part with the branch part 6 is equipped with a pig passage confirmation device 22 for detecting that the pig 11 has passed through this same diameter part 21. , and a drain pipe 23 with a gate valve are provided. Although not shown, the pig confirmation device is located in the sewer pipe 1.
They are also provided in the middle of the water collection pit 3 and in the vicinity of the water collection pit 3, so that the progress of the pig 11 can be confirmed. The drain pipe 23 is led to the sewer using a pipe.
【００１３】下水処理場内の集水ピット３の近傍ににお
ける下水管路１の部分には、仕切弁２４と、管路１内へ
の流体供給管２５とが設けられている。圧送式の下水管
路１に使用される配管には、長期的に腐食を防止するた
めに、内面モルタルライニングや粉体ライニングが施工
されている。このため、管内を通過中にピグ１１がその
内面に損傷を与えないように、ピグ１１は、発泡ポリウ
レタン樹脂の全面を耐下水用樹脂で覆った構成とされて
いる。
またピグ１１は、集水ピット３での回収に便利なように
、下水に対して十分な浮力を有するとともに、その先端
に、運搬、引上げ用のロープなどが設けられている。あ
るいは、これに代えて、集水ピット３における下水管路
１の開口にピグ回収用のカゴなどを設けることもできる
。A gate valve 24 and a fluid supply pipe 25 into the pipe 1 are provided in a portion of the sewage pipe 1 near the water collection pit 3 in the sewage treatment plant. The piping used in the pressure-feeding type sewage pipe 1 is provided with internal mortar lining or powder lining in order to prevent corrosion over the long term. Therefore, in order to prevent the pig 11 from damaging its inner surface while passing through the pipe, the pig 11 has a structure in which the entire surface of the foamed polyurethane resin is covered with a sewage-resistant resin. Further, the pig 11 has sufficient buoyancy with respect to the sewage water so that it can be conveniently collected in the water collection pit 3, and a rope for transporting and pulling up the pig 11 is provided at its tip. Alternatively, instead of this, a basket for collecting pigs or the like may be provided at the opening of the sewage pipe 1 in the water collection pit 3.
【００１４】このような構成において、平常時には、仕
切弁５、２４を「開」とするとともに、仕切弁７、１４
を「閉」として、ポンプ４を運転する。すると、ポンプ
場の集水ピット２内の下水は、下水管路１内を圧送され
て下水処理場の集水ピット３へ送られる。In such a configuration, in normal times, the gate valves 5 and 24 are kept open, and the gate valves 7 and 14 are kept open.
is set to "closed" and the pump 4 is operated. Then, the sewage in the water collection pit 2 of the pumping station is pumped through the sewage pipe 1 and sent to the water collection pit 3 of the sewage treatment plant.
【００１５】管内を洗浄するときには、ピグ発射装置８
の開閉蓋１０を開いて本体胴部９の中にピグ１１を挿入
し、このピグ１１を、供給管１５およびバイパス管１３
の位置を越えた同径部２１の位置まで送り込む。かつ、
蓋１０を閉じて安全装置１２を作用させる。次にポンプ
４を停止し、仕切弁５を閉じるとともに仕切弁１４を開
く。そしてポンプ４を運転すると、加圧された下水がバ
イパス管１３を通って発射装置８に導かれ、ピグ１１の
後方への注水が行われる。そこで仕切弁７を開くと、バ
イパス管１３からの下水により後押しされることで、ピ
グ１１は、同径部２１から管路１の中へ送り込まれる。
こうすることで、仕切弁７を開くことによる逆流の作用
でピグ１１が後方へ押し流され、管路１内に進入しなく
なるといった事態の発生が防止される。同径部２１をピ
グ１１が通過したことが確認装置２２によって検知され
ると、このピグ１１が管路１内に入ったことが確認され
る。When cleaning the inside of the pipe, the pig launching device 8
Open the lid 10 of the main body, insert the pig 11 into the main body body 9, and insert the pig 11 into the supply pipe 15 and the bypass pipe 13.
It is fed to the same diameter portion 21 beyond the position. and,
The lid 10 is closed and the safety device 12 is activated. Next, the pump 4 is stopped, the gate valve 5 is closed, and the gate valve 14 is opened. Then, when the pump 4 is operated, pressurized sewage is guided to the firing device 8 through the bypass pipe 13, and water is injected to the rear of the pig 11. When the gate valve 7 is opened, the pig 11 is pushed by the sewage from the bypass pipe 13 and is sent into the pipe line 1 from the same diameter portion 21. This prevents the occurrence of a situation in which the pig 11 is swept backward due to the backflow effect caused by opening the gate valve 7 and does not enter the pipe line 1. When the confirmation device 22 detects that the pig 11 has passed through the same diameter portion 21, it is confirmed that the pig 11 has entered the pipe line 1.
【００１６】管路１の中に入ったピグ１１は、ポンプ４
から供給される加圧状態の下水により押圧され、下水処
理場の集水ピット３へ向けて移動される。このとき、管
路１の内面のスケールなどが除去され、管内が洗浄され
る。スケールの成長を防止するため、一定期間ごとにピ
グ１１を用いた同様の洗浄を行う。The pig 11 that has entered the pipe line 1 is connected to the pump 4
It is pressed by pressurized sewage supplied from the sewage treatment plant and moved toward the water collection pit 3 of the sewage treatment plant. At this time, scale and the like on the inner surface of the pipe line 1 are removed and the inside of the pipe is cleaned. In order to prevent scale growth, similar cleaning is performed using the pig 11 at regular intervals.
【００１７】ポンプ４からの下水に代えて、清水でピグ
１１を発射させることもできる。その場合には、仕切弁
１４を閉じるとともに仕切弁１６を開き、供給管１５か
らの加圧状態の清水を本体胴部９の内部へ供給する。こ
の供給管１５には逆止弁１７が設けられているため、下
水が清水側へ流れ込むことが防止される。[0017] Instead of the sewage from the pump 4, the pig 11 can be launched with fresh water. In that case, the gate valve 14 is closed and the gate valve 16 is opened to supply pressurized fresh water from the supply pipe 15 into the main body body 9 . Since this supply pipe 15 is provided with a check valve 17, sewage is prevented from flowing into the fresh water side.
【００１８】ピグ１１を発射するためには、通常、高圧
状態の多量の水を必要とするので、バイパス管１３から
の下水または供給管１５からの清水のいずれか一方だけ
では不足する場合には、両者を同時に本体胴部９に送り
込むこともできる。またピグ発射装置８内を洗浄すると
きには、供給管１５からの清水をそのために利用すれば
よい。In order to launch the pig 11, a large amount of water under high pressure is usually required, so if either the sewage from the bypass pipe 13 or the fresh water from the supply pipe 15 is insufficient, , it is also possible to feed both of them into the main body body section 9 at the same time. Furthermore, when cleaning the inside of the pig launcher 8, fresh water from the supply pipe 15 may be used for that purpose.
【００１９】管路１の途中に大きな異物がある場合など
、管路１の途中でピグ１１が動かなくなったときには、
これを逆送りさせる。このときには、まずポンプ４を停
止し、仕切弁２４を閉じる。次に、流体供給管２５から
、管路１の内部へ気体または水を送り込む。するとピグ
１１は逆送りされ、仕切弁７を通過してピグ発射装置に
戻される。When the pig 11 becomes stuck in the middle of the pipe line 1, such as when there is a large foreign object in the middle of the pipe line 1,
Send this backwards. At this time, first the pump 4 is stopped and the gate valve 24 is closed. Next, gas or water is sent into the pipe line 1 from the fluid supply pipe 25 . The pig 11 is then sent back, passing through the gate valve 7 and returning to the pig launcher.
【００２０】[0020]
【発明の効果】以上述べたように本発明によると、管路
に設けられた分岐部にピグの発射装置を取り付け、前記
分岐部よりも上流側における管路の部分からピグの発射
装置に向かうバイパス管を設けて、このバイパス管内を
通る加圧状態の水により前記ピグを管内に向けて発射さ
せるようにしたため、管内と発射装置との連通を絶った
状態でこの発射装置内にピグを挿入し、その後にバイパ
ス管からの加圧状態の水を発射装置内に供給することで
、管路の通水を停止することなしに、また外部から加圧
水の供給を受けることなしに、ピグによる管内の洗浄を
行うことができる。As described above, according to the present invention, a pig launcher is attached to a branch provided in a pipe, and a pig launcher is directed from a portion of the pipe upstream of the branch to the pig launcher. A bypass pipe was provided, and the pig was launched into the pipe by pressurized water passing through the bypass pipe, so the pig was inserted into the launcher with the communication between the inside of the pipe and the launcher cut off. Then, by supplying pressurized water from the bypass pipe into the launching device, the pipe can be filled with a pig without stopping water flow through the pipe or receiving pressurized water from outside. can be cleaned.
【図１】本発明の一実施例のピグを用いた管内洗浄装置
の正面図である。FIG. 1 is a front view of a pipe cleaning device using a pig according to an embodiment of the present invention.
【図２】図１におけるピグ発射装置の拡大正面図である
。FIG. 2 is an enlarged front view of the pig launcher in FIG. 1;
【図３】図２の発射装置の一部を切り欠いて示す側面図
である。FIG. 3 is a partially cutaway side view of the firing device of FIG. 2;
１ 下水管路 ４ 汚泥圧送ポンプ ６ 分岐部 ８ ピグ発射装置 ９ 本体胴部 １０ 開閉蓋 １１ ピグ １３ バイパス管 １５ 供給管 1 Sewer pipe 4 Sludge pressure pump 6 Branch part 8 Pig launcher 9 Main body body 10 Opening/closing lid 11 Pig 13 Bypass pipe 15 Supply pipe
Claims (1)
グを通過させて管内面を洗浄するための装置であって、
前記管路における上流部分にこの管路からの分岐部を設
けて、この分岐部にピグの発射装置を取り付け、前記分
岐部よりも上流側における管路の部分からピグの発射装
置に向かうバイパス管を設けて、このバイパス管内を通
る加圧状態の水により前記ピグを管内に向けて発射させ
るようにしたことを特徴とするピグを用いた管内洗浄装
置。Claim 1: A device for cleaning the inner surface of a pipe by passing a pig through the inside of the pipe for pumping water, comprising:
A branch from the pipe is provided in an upstream portion of the pipe, a pig launcher is attached to the branch, and a bypass pipe is directed from a portion of the pipe upstream of the branch to the pig launcher. 1. A pipe cleaning device using a pig, characterized in that the pig is ejected into the pipe by pressurized water passing through the bypass pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3121525A JP2721050B2 (en) | 1991-05-28 | 1991-05-28 | In-pipe cleaning device using pig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3121525A JP2721050B2 (en) | 1991-05-28 | 1991-05-28 | In-pipe cleaning device using pig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04349986A true JPH04349986A (en) | 1992-12-04 |
| JP2721050B2 JP2721050B2 (en) | 1998-03-04 |
Family
ID=14813386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3121525A Expired - Lifetime JP2721050B2 (en) | 1991-05-28 | 1991-05-28 | In-pipe cleaning device using pig |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2721050B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6391121B1 (en) * | 1997-10-31 | 2002-05-21 | On Stream Technologies Inc. | Method of cleaning a heater |
| WO2012103234A2 (en) * | 2011-01-25 | 2012-08-02 | Technip France | Online pigging system and method |
| CN106925577A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | A kind of discarded oil-gas pipeline residue cleaning method |
| CN108723030A (en) * | 2018-03-22 | 2018-11-02 | 辽宁三三工业有限公司 | A kind of novel complete-section tunnel boring machine grouting pipeline cleaning device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101420008B1 (en) * | 2012-08-21 | 2014-07-17 | 주식회사 한국가스기술공사 | A cleaning apparatus for pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631480A (en) * | 1979-08-20 | 1981-03-30 | Inoue Shokai | Surface cleaner for steel pipe pile in sea |
-
1991
- 1991-05-28 JP JP3121525A patent/JP2721050B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631480A (en) * | 1979-08-20 | 1981-03-30 | Inoue Shokai | Surface cleaner for steel pipe pile in sea |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6391121B1 (en) * | 1997-10-31 | 2002-05-21 | On Stream Technologies Inc. | Method of cleaning a heater |
| WO2012103234A2 (en) * | 2011-01-25 | 2012-08-02 | Technip France | Online pigging system and method |
| WO2012103234A3 (en) * | 2011-01-25 | 2013-06-27 | Technip France | Online pigging system and method |
| CN106925577A (en) * | 2015-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | A kind of discarded oil-gas pipeline residue cleaning method |
| CN108723030A (en) * | 2018-03-22 | 2018-11-02 | 辽宁三三工业有限公司 | A kind of novel complete-section tunnel boring machine grouting pipeline cleaning device |
| CN108723030B (en) * | 2018-03-22 | 2024-02-02 | 辽宁三三工业有限公司 | Novel full-face tunnel boring machine grouting pipeline washs device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2721050B2 (en) | 1998-03-04 |
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