METHOD FOR REMOVING CONTAMINANT ON INNER FACE OF PIPELINE

PROBLEM TO BE SOLVED: To shorten a removing (cleaning) time of a contaminant in a pipeline and to reduce a use amount of a pressure-fed fluid.SOLUTION: A method for removing a contaminant on an inner face of a pipeline comprises: putting a pig 20 from a part (a launcher L) of a pipeline A into the p...

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Main Authors FUJIMOTO MITSUNOBU, SHIMOMURA JUN, MICHIURA YOSHISADA, HIRATA SHOICHI, HAZAMA MASAYA, YAMAMOTO MASAKAZU
Format Patent
LanguageEnglish
Japanese
Published 04.10.2018
Subjects
CLEANING
CLEANING IN GENERAL
FIXED CONSTRUCTIONS
INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, ORDISTRIBUTING WATER
PERFORMING OPERATIONS
PREVENTION OF FOULING IN GENERAL
SEWERAGE
TRANSPORTING
WATER SUPPLY
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Summary:PROBLEM TO BE SOLVED: To shorten a removing (cleaning) time of a contaminant in a pipeline and to reduce a use amount of a pressure-fed fluid.SOLUTION: A method for removing a contaminant on an inner face of a pipeline comprises: putting a pig 20 from a part (a launcher L) of a pipeline A into the pipeline; pressure-feeding a fluid from the part of the pipeline into the pipeline, to move the pig 20 in the length direction of the pipeline; peeling a contaminant on an inner face of the pipeline by friction of the pig with the inner face of the pipeline; and taking out the pig and the peeled contaminant together with the fluid out of another part (a catcher C) of the pipeline. Multiple pigs 20 can be used in a manner that before a preceding pig reaches the another part of the pipeline, a following pig is moved from the part of the pipeline successively, independently and freely (feeding pigs successively). At this time, the following pig is made harder than the preceding pig, and/or a diameter of the following pig is made larger than that of the preceding pig. By feeding the pigs successively, cleaning time can be shortened and a use amount of the pressure-fed fluid can be reduced.SELECTED DRAWING: Figure 1 【課題】管路内の夾雑物の除去（洗浄）時間を短くするとともに、圧送流体の使用量を少なくする。【解決手段】管路Ａの一部（ランチャーＬ）からピグ２０を管路内に投入し、その管路の一部から管路内に流体を圧送して管路の長さ方向に前記ピグ２０を走行させ、そのピグと管路内面との摩擦によって管路内面の夾雑物を剥離し、管路の他部（キャッチャーＣ）から前記ピグ及び剥離した夾雑物を流体と共に取り出す管路内面の夾雑物除去方法である。複数のピグ２０を、先行きのピグが管路の他部に至る前に一部から後行きのピグを連続的に独立して自由に走行させる（連球させる）。このとき、先行のピグより後行きのピグを硬くしたり、先行きのピグより後行きのピグの径を大きくしたりする。連球すると、洗浄時間が短くなると共に、使用圧送流体量も少なくなる。【選択図】図１
Bibliography:Application Number: JP20180047866