JP5685743B2 - Electrolytic treatment method for long pipes and inner surfaces of containers - Google Patents
Electrolytic treatment method for long pipes and inner surfaces of containers Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 14
- 239000003792 electrolyte Substances 0.000 claims description 49
- 239000008151 electrolyte solution Substances 0.000 claims description 28
- 230000006698 induction Effects 0.000 claims description 23
- 230000005291 magnetic effect Effects 0.000 claims description 17
- 239000011810 insulating material Substances 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 description 17
- 238000002161 passivation Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 239000003302 ferromagnetic material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Description
本発明は、長尺パイプ（直管、曲管、分岐管などを含む）及び容器類（分岐管を含む）に関し（以下総称して長尺パイプと称す）の内外面に設けた磁石（永久磁石、電磁石及び強磁性体で以下総称して磁石と称す。）を有し、長尺パイプ外面に設けた誘導磁石を作動させることにより、長尺パイプ内面に挿入された磁石、電極などからなる電解処理装置を誘導して、長尺パイプ内面の溶接部の焼け取りや錆取り、及び／又は長尺パイプ内面の所定の箇所の表面改質及び不動態化処理を極めて簡単に施工することのできる長尺パイプの電解処理方法に関する。 The present invention relates to long pipes (including straight pipes, curved pipes, branch pipes, etc.) and containers (including branch pipes) (hereinafter collectively referred to as long pipes) magnets (permanently). A magnet, an electromagnet, and a ferromagnetic material, hereinafter collectively referred to as a magnet.), And a magnet, an electrode, and the like inserted into the long pipe inner surface by operating an induction magnet provided on the outer surface of the long pipe. It is possible to guide the electrolytic treatment device to burn and rust the welded portion of the inner surface of the long pipe and / or to modify the surface of the predetermined portion of the inner surface of the long pipe and passivate it very easily. The present invention relates to a method for electrolytic treatment of a long pipe.
食品、医薬品及び精密化学品の製造装置等に使用されるパイプは、雑菌、不純物等が付着しないように、あるいは雑菌や異物等を容易に洗浄除去し易くするために、ステンレス鋼製のサニタリーパイプが使用され、パイプ内面はバフ研磨や電解研磨等により鏡面仕上げが施され、より平滑度を有するように仕上げ加工されている。 Stainless steel sanitary pipes are used for food, pharmaceuticals, fine chemical manufacturing equipment, etc. so that bacteria, impurities, etc. do not adhere to them, or in order to easily wash and remove bacteria and foreign substances. Is used, and the inner surface of the pipe is mirror-finished by buffing, electrolytic polishing, or the like, and finished to have a smoothness.
例えば、特許文献１は、ステンレススチール等の金属管の内面を機械的、電気化学的方法を組み合わせ、研磨バフを電解液流通管と一体に金属管内を軸方向に沿って走行させながら、金属管を回転させ効率良く研磨する方法が開示されている。 For example, in
特許文献２ないし４は、磁石を用いる点で本発明に関係するものであり、特許文献２は、弾性及び浸透性を有する研磨不織布、バフ、スポンジ等の絶縁物を付着させた強磁性体をパイプ内部に挿入し、パイプ外側に配置した磁石による磁力で強磁性体を介して、絶縁物をパイプ内面に押し付け、パイプ内部に電解液を供給し、強磁性体を陰極、パイプを陽極として強磁性体とパイプとの間に電流を供給し、パイプ内面を電解研磨すると同時に、パイプと強磁性体とを相対移動させるパイプ内面の電解磁気研磨方法が開示されている。 Patent Documents 2 to 4 relate to the present invention in that a magnet is used, and Patent Document 2 describes a ferromagnetic material to which an insulating material such as a polishing nonwoven fabric, a buff, or a sponge having elasticity and permeability is attached. The insulator is pressed against the inner surface of the pipe through the ferromagnetic material by the magnetic force of the magnet placed outside the pipe and placed outside the pipe, and the electrolyte is supplied to the inside of the pipe, with the ferromagnetic material as the cathode and the pipe as the anode. An electrolytic magnetic polishing method for an inner surface of a pipe is disclosed in which an electric current is supplied between a magnetic body and a pipe to electrolytically polish the inner surface of the pipe and at the same time move the pipe and the ferromagnetic material relative to each other.
特許文献３は、回転反発磁場を利用して機械研磨及び化学研磨を組み合わせたもので、輸送パイプ内部を挿通可能で管内牽引体と電解液供給パイプを接続した磁性体コマノズルと、その前後に対向配置した一対のシールドと、シールドの閉状態を解除するストッパとからなる電解溶液研磨装置と、輸送パイプ研磨対象部外周に着脱可能に取り付けた固定体と、本体に設けた回転プーリと、インターナルギヤと太陽歯車と、インターナルギヤーと太陽歯車に噛み合わせた複数の遊星歯車と、遊星歯車の回転軸に固定し遊星歯車と共に公転自転可能とした磁石円盤とからなる反発磁場形成装置とにより構成され、輸送パイプの直管部や曲管部内面の所定要部内面を高い精度で電解研磨する研磨装置が開示されている。 Patent Document 3 is a combination of mechanical polishing and chemical polishing using a rotating repulsive magnetic field, and a magnetic coma nozzle that can be inserted through a transport pipe and connected to an in-tube puller and an electrolyte supply pipe, and is opposed to the front and back thereof. An electrolytic solution polishing apparatus comprising a pair of shields arranged and a stopper for releasing the shield closed state, a fixed body detachably attached to the outer periphery of the transportation pipe polishing target, a rotating pulley provided on the main body, an internal Consists of a repulsive magnetic field forming device comprising a gear, a sun gear, a plurality of planetary gears meshed with the internal gear and the sun gear, and a magnet disk fixed to the rotating shaft of the planetary gear and capable of revolving with the planetary gear. In addition, there has been disclosed a polishing apparatus that electrolytically polishes the inner surfaces of predetermined main parts of the straight pipe portion and the bent pipe portion of the transport pipe with high accuracy.
特許文献４は、ステンレス鋼製密閉容器内の溶接焼け、錆等の汚れ除去方法として、先に本出願人が提案しているもので、ステンレス鋼製の小開口部を備えた筒状密閉容器内の溶接線に沿い当接するように、電気短絡防止用の布を被覆した電極と、布に電解液を供給する供給装置と、電極と一体的に装着した永久磁石、または電磁石又は磁性材料を備え、一方容器の外周回りの溶接線上には、磁石等と容器壁を挟んで相対峙するように、磁石等と相吸引するよう磁石を固定配置して、磁石による吸着力により容器内電極を溶接線上に密着させたうえ、容器を軸回りに回動するか、磁石自体を容器外周回り溶接線上を移動させつつ、容器を他電極として容器内の電極との間で電解処理する方法が開示されている。 Patent Document 4 proposes the present applicant as a method for removing dirt such as welding burn and rust in a stainless steel sealed container, and is a cylindrical sealed container having a small opening made of stainless steel. An electrode coated with a cloth for preventing electrical short-circuiting so as to abut along the inner welding line, a supply device for supplying an electrolytic solution to the cloth, a permanent magnet, or an electromagnet or magnetic material attached integrally with the electrode On the other hand, on the weld line around the outer periphery of the container, a magnet is fixedly arranged so as to attract the magnet and the like so as to be opposed to each other across the container wall, and the electrode in the container is attached by the adsorption force of the magnet. Disclosed is a method of performing electrolytic treatment between an electrode in a container using the container as another electrode while rotating the container around its axis or moving the magnet itself around the outer periphery of the container on the welding line while closely contacting the weld line. Has been.
しかしながら、特許文献１においては、機械研磨と電解研磨とを併用することによる金属管内面の鏡面研磨に関するものであり、金属管内面に挿入された研磨バフの軸方向への移動は巻取りローラによるワイヤの引張りにより行われるもので、巻取り装置を必要とするのみならず、金属管内面の溶接部等を性格に特定して電解処理することはできない。
特許文献２は、パイプ外側に配置した磁石の磁力によりパイプ内の研磨電極を保持し、パイプと強磁性体とを相対移動させることで、パイプ内面の研磨を施すことができるが、研磨仕上げが目的であり、電解液はパイプ内に多量に流入させる方式である。電解液を多量に流入させるため、電解液の後処理が必要となる。
また、パイプが縦方向に設置されている場合や曲管部を有するもの、更には分岐管を有するもの等には電解液を目的の位置に流入させることが困難であり、良好な研磨を行うことができない。
特許文献３は、パイプ内面の直管部や曲管部を問わず、任意の研磨部、例えば溶接部に磁性体コマノズルをパイプ内面に位置させると共にパイプ外面に公転自転可能な回転磁石円盤を位置させることで、溶接部に対し磁性体コマノズルから電解液を噴射して、溶接裏波ビード凹凸を電解除去し得るという利点を有するものの、パイプ内部に挿入される磁性体コマノズルは外部磁石により誘導されるものではなく、管内牽引体によってパイプ軸方向に牽引されて、外部磁石の位置に設定されるものであり、外部磁石は自転公転による反発磁場を形成させて電解溶液を活性化させるものである。
また、電解液も部分的ではあるがパイプ内面に噴射させる方式であるため、電解液の回収と戻し循環手段を必要とするなど装置が複雑且つ高価であるという問題がある。
特許文献４は、密閉容器内溶接部の溶接焼け取りや錆取り等を簡単な装置で可能としたものではあるが、容器外面に配設された磁石は容器の溶接部に固定配置されたもので、容器内面の任意の位置に誘導し電解処理することはできない。However,
Patent Document 2 can polish the inner surface of the pipe by holding the polishing electrode in the pipe by the magnetic force of the magnet arranged outside the pipe and moving the pipe and the ferromagnetic material relative to each other. The purpose is to make a large amount of electrolyte flow into the pipe. In order to allow a large amount of electrolyte to flow, post-treatment of the electrolyte is required.
In addition, when the pipe is installed in the vertical direction, or has a curved pipe part, and further has a branch pipe, it is difficult to allow the electrolyte to flow into the target position, and good polishing is performed. I can't.
Patent Document 3 positions a rotating magnet disk capable of revolving and rotating on the outer surface of a pipe while positioning a magnetic body nozzle on an inner surface of an arbitrary polishing portion, for example, a welded portion, regardless of a straight pipe portion or a bent pipe portion on the inner surface of the pipe. Although having the advantage that the electrolytic solution can be injected from the magnetic body nozzle to the welded portion and the weld back bead irregularities can be removed by electrolysis, the magnetic body nozzle inserted inside the pipe is guided by an external magnet. It is not a thing, but is pulled in the pipe axial direction by the pulling body in the pipe and is set at the position of the external magnet. The external magnet forms a repulsive magnetic field due to rotation and revolution and activates the electrolytic solution. .
In addition, since the electrolytic solution is also partially sprayed on the inner surface of the pipe, there is a problem that the apparatus is complicated and expensive, such as the need for electrolytic solution recovery and return circulation means.
In Patent Document 4, the welding burn-in and rust removal of the welded part in the sealed container is made possible with a simple device, but the magnet arranged on the outer surface of the container is fixedly arranged on the welded part of the container. In addition, it cannot be electrolyzed by induction at any position on the inner surface of the container.
なお、昨今４ｍを超えるステンレス鋼製の長尺サニタリーパイプにおいて、パイプ内面の加工技術の向上により、平滑度の高いパイプが提供されるようになってきた。
このような平滑度の高いパイプは、直管パイプ内面を電解処理などにより清浄化処理したのみで、現地において曲管部と溶接加工することが要求されてきている。
溶接を行う場合は、電流、電圧を制御し均一な裏波ビードが出るように配慮されるが、溶接部近辺、更には曲管部等は短いため周辺に熱影響を受けることは避けがたく、現地においてパイプ内面の溶接部の焼け取りや錆取り、更には熱影響部の表面改質や不動態化処理などのニーズが高まってきている現状にある。In addition, in recent long sanitary pipes made of stainless steel exceeding 4 m, pipes with high smoothness have been provided by improving the inner surface processing technology.
Such a pipe with high smoothness has been required to be welded to the curved pipe portion on site only by cleaning the inner surface of the straight pipe by electrolytic treatment or the like.
When welding, it is considered to control the current and voltage so that a uniform back bead is produced, but it is inevitable that the vicinity of the weld and the bent pipe will be affected by the heat due to the short length. However, there is a growing need in the field for burning and rust removal of the welded portion of the inner surface of the pipe, as well as surface modification and passivation treatment of the heat affected zone.
本発明はかかる事情に鑑み、長尺パイプ内面の溶接部の焼け取りや錆取り、更にはその周辺の表面改質や不動態化処理に適した中性塩電解処理方法を提供することを目的とする。 In view of such circumstances, the present invention aims to provide a neutral salt electrolytic treatment method suitable for scoring and rust removal of the welded portion of the inner surface of the long pipe, as well as surface modification and passivation treatment in the vicinity thereof. To do.
請求項１の発明は、導電性材料からなる電解液供給ノズルの先端に電極板と磁石とを重ねて装着し、該電解液供給ノズルの他端には電解液給液チューブと給電用の被覆ワイヤーとを接続すると共に、前記電解液供給ノズル、電極板及び磁石とを電解液浸透性の絶縁材で被覆して長尺パイプまたは容器内面に挿入移動可能となし、長尺パイプまたは容器の外面に誘導磁石を配設して、該誘導磁石の磁力による吸着力により、長尺パイプまたは容器内面の磁石が装着された電極板及び電解液浸透性の絶縁材を長尺パイプまたは容器内面に接近若しくは密着、誘導させながら、前記電解液浸透性の絶縁材と長尺パイプまたは容器内面間に電解液を供給しつつ、長尺パイプまたは容器外面に配設された誘導磁石を移動させることにより、長尺パイプまたは容器内面の電極を移動させて、長尺パイプまたは容器内面の溶接部、熱影響部及び／又は長尺パイプまたは容器内面の所定の箇所を電解処理することを特徴とする長尺パイプまたは容器内面の電解処理方法である。According to the first aspect of the present invention, an electrode plate and a magnet are overlapped and attached to the tip of an electrolyte supply nozzle made of a conductive material, and an electrolyte solution supply tube and a power supply coating are attached to the other end of the electrolyte supply nozzle. Connect the wire and coat the electrolyte supply nozzle, electrode plate and magnet with an electrolyte permeable insulating material so that it can be inserted and moved into the inner surface of the long pipe or container, and the outer surface of the long pipe or container An induction magnet is disposed on the electrode plate, and the electrode plate on which the magnet of the long pipe or the inner surface of the container is attached and the electrolyte permeable insulating material are brought closer to the inner surface of the long pipe or the container by the attractive force of the induction magnet. Alternatively, while closely contacting and guiding, while supplying the electrolyte solution between the electrolyte permeable insulating material and the long pipe or the inner surface of the container, by moving the induction magnet disposed on the long pipe or the outer surface of the container, Long pipe Moves the electrode on the inner surface of the container, and electrolyzes the long pipe or the welded portion on the inner surface of the container, the heat-affected zone, and / or a predetermined portion of the long pipe or the inner surface of the container. This is an inner surface electrolytic treatment method.
請求項２記載の発明は、導電性材料からなる電解液供給ノズルの先端に電極板と磁石とを重ねて装着し、該電解液供給ノズルの他端には電解液給液チューブと給電用のワイヤーとを接続したのち電解液供給ノズルの他端、電解液給液チューブ、給電用のワイヤーを保護チューブで被覆し、更に前記電解液供給ノズル、電極板及び磁石とを電解液浸透性の絶縁材で被覆して長尺パイプまたは容器内面に挿入移動可能となし、長尺パイプまたは容器を電源器の陽極側に、前記ワイヤーを陰極側に接続し、長尺パイプまたは容器の外面に誘導磁石を配設して、該誘導磁石の磁力による吸着力により、長尺パイプまたは容器内面の電極板及び電解液浸透性の絶縁材を長尺パイプまたは容器内面に接近、密着、誘導させながら、前記電解液浸透性の絶縁材と長尺パイプまたは容器内面間に電解液を供給しつつ、長尺パイプまたは容器外面に配設された誘導磁石を移動させることにより、長尺パイプの内面または容器内面の電極を移動させて、長尺パイプまたは容器内面の溶接部、熱影響部及び／又は長尺パイプまたは容器内面の所定の箇所を電解処理することを特徴とする長尺パイプ、容器内面の電解処理方法にある。According to the second aspect of the present invention, an electrode plate and a magnet are mounted on the tip of an electrolyte supply nozzle made of a conductive material, and an electrolyte solution supply tube and a power supply tube are attached to the other end of the electrolyte supply nozzle. After connecting the wire, the other end of the electrolyte supply nozzle, the electrolyte supply tube, and the power supply wire are covered with a protective tube, and the electrolyte supply nozzle, electrode plate, and magnet are insulated from the electrolyte solution. It can be inserted and moved to the inner surface of a long pipe or container by covering with a material, the long pipe or container is connected to the anode side of the power supply, the wire is connected to the cathode side, and an induction magnet is connected to the outer surface of the long pipe or container The electrode plate on the inner surface of the long pipe or the container and the electrolyte permeable insulating material are brought close to, intimately contacted with, and guided to the inner surface of the long pipe or the container by the attraction force due to the magnetic force of the induction magnet. Electrolyte permeable insulation While moving the induction magnet disposed on the long pipe or the outer surface of the container while moving the electrolyte between the inner surface of the long pipe or the container, the electrode on the inner surface of the long pipe or the inner surface of the container is moved, There is an electrolytic treatment method for an inner surface of a long pipe or container, characterized in that electrolytic treatment is performed on a welded portion of the long pipe or inner surface of the container, a heat-affected zone, and / or a predetermined portion of the long pipe or inner surface of the container.
本発明に係る電解処理方法によれば、電解液供給ノズルの先端に装着された電極板と磁石とを電解液浸透性の絶縁材で被覆しているので、パイプ内面で短絡することもなく、一方、電解液供給ノズルの他端に給電用の被覆ワイヤーと給液チューブを接続するか、あるいは、給電及び座屈防止用のワイヤーと給液チューブとを接続したのち電解液給液ノズルの他端、電解液給液チューブ、給電用のワイヤーをフレキシブルな保護チューブで被覆した構成としているので、長尺パイプであっても保護チューブを掴んでパイプの一端から簡単に押し込み、挿入することができ且つ特別な旋回装置等を必要とせず、保護チューブの一端を支点として、恰も首を振る如くパイプ内面の周方向にも自由に旋回移動することができる。
目的の位置近くまで挿入した後、次いでパイプ外面の磁石により誘導し、例えば、溶接部まで誘導した後、パイプ外面の磁石を溶接線に沿って周方向に移動させることによりパイプ内面においては、磁力により磁石及び浸透性の絶縁材をパイプ内面に押し付けられた状態で溶接線上を摺動し、溶接部の焼け取りや錆取りなどを良好に行うことができる。
その他、パイプ曲管部等で熱影響を受けた箇所など任意の箇所において、表面改質や不動態化処理など簡単に行うことができるものである。
電解液は浸透性の絶縁材が湿潤する程度であれば良く、従って、パイプの曲管部や分岐管、縦方向に設置された長尺パイプであっても何ら支障なく、また、電解液の後処理も全く必要ない。According to the electrolytic treatment method of the present invention, the electrode plate and the magnet attached to the tip of the electrolyte supply nozzle are covered with an electrolyte-permeable insulating material, so that there is no short circuit on the inner surface of the pipe, On the other hand, the other end of the electrolyte supply nozzle is connected to the power supply coated wire and the liquid supply tube, or after the power supply and buckling prevention wire and the liquid supply tube are connected, Since the end, electrolyte solution supply tube, and power supply wire are covered with a flexible protective tube, even a long pipe can be easily pushed and inserted from one end of the pipe by grasping the protective tube In addition, a special swirling device or the like is not required, and the scissors can freely swivel in the circumferential direction of the inner surface of the pipe as if the head is swung with one end of the protective tube as a fulcrum.
After inserting it near the target position, it is then guided by the magnet on the outer surface of the pipe.For example, after guiding to the weld, the magnet on the outer surface of the pipe is moved in the circumferential direction along the welding line, Thus, the magnet and the permeable insulating material can be slid on the weld line in a state where the magnet and the permeable insulating material are pressed against the inner surface of the pipe, and the welded portion can be burned out and rusted well.
In addition, surface modification, passivation treatment, and the like can be easily performed at an arbitrary place such as a place affected by heat in a pipe bent pipe portion or the like.
The electrolyte solution only needs to wet the permeable insulating material. Therefore, there is no problem even if the pipe is bent or branched, or a long pipe installed in the vertical direction. No post-processing is necessary.
以下、本発明に係る長尺パイプの電解処理方法の実施の形態について図面を基に説明する。図１は、本発明に係る電解処理方法を実施するための長尺パイプ内面に挿入される電解処理装置の要部を示す平面図、図２は、図１におけるＡ−Ａ断面図である。図３はパイプ直管部の溶接部焼け取り電解処理を表す要部断面図、図４は、曲管部における溶接部、熱影響部などの表面改質、不動態化処理などの状態を表す要部断面図である。 Embodiments of an electrolytic treatment method for a long pipe according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an essential part of an electrolytic treatment apparatus inserted into the inner surface of a long pipe for carrying out the electrolytic treatment method according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a cross-sectional view of the main part showing the welded portion burn-out electrolytic treatment of the pipe straight pipe portion, and FIG. 4 shows the state of surface modification, passivation treatment, etc. of the welded portion and the heat affected zone in the bent pipe portion. It is principal part sectional drawing.
図１、図２においてＰは電解処理すべきパイプ、１はＬ字型のステンレス製電解液供給ノズル、２は電解液供給ノズルの先端部分に装着された平板の曲面電極でパイプＰ内面に沿うように同じ曲率で製作されている。３は同曲面電極の上に重ねて装着されたリング状の強力磁石である。
同電解液供給ノズル１の他端には、給電用のワイヤー５と給液チューブ４が接続され、これらは纏めて保護チューブ６で被覆されて、ワイヤー５のパイプＰ内面への接触による短絡防止とパイプＰ内面への挿入時の座屈防止をも兼ねている。
ステンレス製の電解液供給ノズル１と電極板２、強力磁石３はモップと呼ばれる浸透性の不織布７（以下モップという。）で覆われ、パイプＰ内面との短絡を防止すると共に電解処理を行う部分である。このような構成とすることにより、ノズルなど先端部分は特別な回動装置を必要とせず、電解液供給ノズルの端部、保護チューブの端部近傍を支点として、外部磁石の誘導により、恰も首を振るが如くパイプＰ内面の軸方向や周方向など自由につれまわることができる。1 and 2, P is a pipe to be electrolyzed, 1 is an L-shaped stainless steel electrolyte supply nozzle, 2 is a flat curved electrode attached to the tip of the electrolyte supply nozzle, and runs along the inner surface of the pipe P It is produced with the same curvature. Reference numeral 3 denotes a ring-shaped strong magnet mounted on the curved electrode.
The other end of the
The stainless steel
また、対象とする長尺パイプの曲管部が緩やかな場合やパイプの形状が単純な場合などにおいては、図示しないが上記給電用のワイヤーに替えて、被覆導線などの被覆ワイヤーを用いることにより、上記保護チューブを省略することができる。
この場合も、電解液供給ノズルの端部近傍を支点として、外部誘導磁石の誘導により長尺パイプ内面の軸方向や周方向など自由につれまわることができ、作業性に支障はない。In addition, in the case where the bent pipe portion of the target long pipe is gentle or the shape of the pipe is simple, although not shown, by using a covered wire such as a covered conductor instead of the power supply wire, The protective tube can be omitted.
Also in this case, the vicinity of the end of the electrolyte supply nozzle can be used as a fulcrum, and the axial direction and the circumferential direction of the inner surface of the long pipe can be freely guided by the induction of the external induction magnet, so that the workability is not hindered.
次に図３及び図４を用いて、パイプ内面の電解処理の実施の形態について説明する。図３において、ＰはパイプでＰｗはパイプ直管部の溶接部を示し、図１、図２で示した電解処理装置がパイプＰ内面に挿入され、後述するパイプＰ外面の磁石８の誘導により、パイプＰの溶接部に設置された状態を表している。
１は電解液供給ノズル、２は電極板、３は磁石、４は給液チューブ、５は給電ワイヤー、６は保護チューブ、７はモップである。
８はパイプＰの外面に配設される強力誘導磁石を示し、ゴム材９で固定されている。１０は電解処理用の電源器、１１は中性塩の電解液タンク、１２は給液チューブ４を通して電解液を電解液供給ノズル１、モップ７に送るためのポンプである。
パイプＰは電源器の陽極側に、電極板２に通じるワイヤー５は電源器の陰極側にそれぞれ接続されている。
中性塩電解液タンク１１から電解液を電解液供給ノズル１、モップ７に送りモップ７を湿潤させた状態で、電源器１０のスイッチを入れパイプＰ外面の強力磁石８を溶接線上に沿って移動させると、パイプＰ内面の磁石３が磁力により吸着されて、モップ７はパイプＰ内面に強く接触しながら、溶接線上を回動しこのモップ７の作用により溶接線上全域にわたって、溶接焼け取りが完了する。勿論、パイプＰ外面の強力磁石を自由に移動させることにより、溶接部周辺の熱影響部などについても、表面改質処理や不動態化処理などを行うことができる。
また、本例のようにパイプＰが直管である場合は、パイプＰ外面の磁石８をパイプＰ周方向に移動させる代わりに簡単な装置でパイプＰを回転させ電解処理を行うこともできる。Next, an embodiment of electrolytic treatment of the pipe inner surface will be described with reference to FIGS. In FIG. 3, P is a pipe, Pw is a welded portion of the pipe straight pipe portion, the electrolytic treatment apparatus shown in FIGS. 1 and 2 is inserted into the inner surface of the pipe P, and is guided by a magnet 8 on the outer surface of the pipe P described later. The state installed in the welding part of the pipe P is represented.
1 is an electrolyte supply nozzle, 2 is an electrode plate, 3 is a magnet, 4 is a liquid supply tube, 5 is a power supply wire, 6 is a protective tube, and 7 is a mop.
Reference numeral 8 denotes a strong induction magnet disposed on the outer surface of the pipe P, which is fixed by a
The pipe P is connected to the anode side of the power supply, and the
With the electrolyte supplied from the neutral
Further, when the pipe P is a straight pipe as in this example, the pipe P can be rotated by a simple device to perform the electrolytic treatment instead of moving the magnet 8 on the outer surface of the pipe P in the circumferential direction of the pipe P.
図４は縦横のパイプをエルボなど曲管で溶接接合した場合の溶接部Ｐｗの焼け取りの状態を示す図で、電解液供給ノズル１、電極板２、強力磁石３、これらを覆ったモップ７、電解液供給ノズル１の他端に接続した給液チューブ４、ワイヤー５、保護チューブ６からなり、保護チューブ６を掴んで、パイプＰ内面に押し込み挿入する。モップ７、電極２、磁石３など先端部を曲管部の近傍Ｘまで挿入し、次いで曲管部近傍Ｘの位置に配設されたパイプ外面の強力誘導磁石８をパイプＰ曲面に沿ってＹ近傍まで移動させると、パイプＰ内面の磁石３が吸着されて、モップ７など先端部はＹの位置まで誘導される。
溶接部Ｐｗなど所定の位置に設定された後、前述図３の場合と同様にモップ７に電解液を僅かに供給しながら、パイプＰ外面の強力磁石８をパイプＰの周方向に移動させると、パイプＰ内面のモップ７がパイプＰ内面に強く押し付けられた状態で、パイプＰ内面の全周を摺動することとなり、このモップの作用で溶接部全体の焼け取りを行うことができる。同様の操作の他、パイプ外面の誘導磁石８を軸方向、若しくは螺旋状Ｒ方向に長尺パイプ曲管部など熱影響を受けた箇所を移動させることにより、パイプＰ内面の表面改質処理や、不動態化処理などを簡単に行うことができる。
電極板２は、曲板、波板、及び適宜間隔で孔の開いたパンチングメタルなどを用いて、電解時に発生するガスを逃がし易くすることもできる。FIG. 4 is a view showing the burned-out state of the welded portion Pw when the vertical and horizontal pipes are welded together with curved pipes such as elbows. The electrolytic
After the welding part Pw is set at a predetermined position, the strong magnet 8 on the outer surface of the pipe P is moved in the circumferential direction of the pipe P while supplying the electrolyte slightly to the
The electrode plate 2 can use a curved plate, a corrugated plate, a punching metal having holes at appropriate intervals, and the like to easily release gas generated during electrolysis.
図１に示す電解処理装置で、ＳＵＳ３０４の電解液供給ノズルの先端部に長さ、幅とも１５ｍｍ、板厚１ｍｍのＳＵＳ３０４曲面電極板を固着し、その上に厚さ６ｍｍ、直径１０ｍｍのリング状のネオジウム強力磁石を重ね、モップで覆った。他端にＳＵＳ３０４からなるワイヤーを固着すると共に２．６φ×２．０φｍｍの給液チューブを接続し、更にこれらを７φ×５φｍｍの保護チューブで被覆した。
その上で、図３に示すように長さ４ｍ、直径５０ｍｍの直管のサニタリーパイプに挿入し、誘導磁石により、溶接部まで誘導した。パイプを電源器の陽極側に、パイプ内面の電極に接続されているワイヤーを陰極側に接続して、給液タンクから中性塩の電解液を３から５ｃｃ／ｍｉｎで送液し、モップを湿潤せしめた状態で、直流と特殊波形の交流を１から１５Ａの電流を供電してパイプ外面の磁石をゆっくり移動させ、電解焼け取り処理を行ったところ、パイプ一周６０秒で溶接部の焼け取りを完了することができた。In the electrolytic treatment apparatus shown in FIG. 1, a SUS304 curved electrode plate having a length and width of 15 mm and a plate thickness of 1 mm is fixed to the tip of an electrolyte supply nozzle of SUS304, and a ring shape having a thickness of 6 mm and a diameter of 10 mm is formed thereon. The neodymium strong magnets were stacked and covered with a mop. A wire made of SUS304 was fixed to the other end, and a 2.6φ × 2.0φmm liquid supply tube was connected, and these were further covered with a 7φ × 5φmm protective tube.
Then, as shown in FIG. 3, it was inserted into a straight sanitary pipe having a length of 4 m and a diameter of 50 mm, and guided to the weld by an induction magnet. Connect the pipe connected to the anode side of the power supply and the wire connected to the electrode on the inner surface of the pipe to the cathode side, and feed the neutral salt electrolyte from the feed tank at 3 to 5 cc / min. In the wet state, a current of 1 to 15 A was applied to the direct current and the alternating current of the special waveform, and the magnet on the outer surface of the pipe was moved slowly, and the electrolytic burn-out treatment was performed. Was able to complete.
ＳＵＳ３０４のＬ字型電解液供給ノズルの先端部に長さ、幅とも１５ｍｍ、板厚１ｍｍのＳＵＳ３０４曲面電極板を固着し、その上に厚さ６ｍｍ、直径１０ｍｍのリング状のネオジウム磁石を重ねてモップで覆った。他端に２．６φｍｍの被覆ワイヤーを接続すると共に２．６φ×２．０φｍｍの給液チューブを接続した。
その上で実施例１と同様に長さ４ｍ、直径５０ｍｍの直管のサニタリーパイプに挿入し、誘導磁石により、溶接部まで誘導した。パイプを電源器の陽極側に、パイプ内面の電極に接続されているワイヤーを陰極側に接続して、給液タンクから中性塩の電解液を３から５ｃｃ／ｍｉｎで送液し、モップを湿潤せしめた状態で、直流と特殊波形の交流を１から１５Ａの電流を供電してパイプ外面の磁石をゆっくり移動させ、電解焼け取り処理を行ったところ、パイプ一周６０秒で溶接部の焼け取りを完了することができた。A SUS304 curved electrode plate having a length and width of 15 mm and a plate thickness of 1 mm is fixed to the tip of the L-shaped electrolyte supply nozzle of SUS304, and a ring-shaped neodymium magnet having a thickness of 6 mm and a diameter of 10 mm is stacked thereon. Covered with mop. A 2.6 φmm coated wire was connected to the other end and a 2.6 φ × 2.0 φmm liquid supply tube was connected.
Then, it was inserted into a straight sanitary pipe having a length of 4 m and a diameter of 50 mm in the same manner as in Example 1 and guided to the welded portion by an induction magnet. Connect the pipe connected to the anode side of the power supply and the wire connected to the electrode on the inner surface of the pipe to the cathode side, and feed the neutral salt electrolyte from the feed tank at 3 to 5 cc / min. In the wet state, a current of 1 to 15 A was applied to the direct current and the alternating current of the special waveform, and the magnet on the outer surface of the pipe was moved slowly, and the electrolytic burn-out treatment was performed. Was able to complete.
実施例１と同じ電解処理装置を用いて、図４に示す直径５０ｍｍ、曲管部までの長さ４ｍのパイプに挿入したところ、押し込むことにより曲管部まで容易に挿入することができた。次いで、パイプ外面の曲管部近傍に配設した誘導磁石をＸからＹ方向へ曲面に沿って移動させたところ、外部誘導磁石の磁力によりパイプ内部磁石が吸着されてパイプ内面の溶接部Ｙの位置まで、簡単に誘導することができた。
実施例１と同様に中性塩からなる電解液を１分間に３から５ｃｃ供給しながら、２から５Ａの電流を給電し、６０秒でパイプ内面溶接部の焼け取り処理を行うことができた。Using the same electrolytic treatment apparatus as in Example 1, the tube was inserted into a pipe having a diameter of 50 mm and a length of 4 m up to the curved pipe portion shown in FIG. 4. Next, when the induction magnet disposed in the vicinity of the curved pipe portion on the outer surface of the pipe is moved along the curved surface from the X direction to the Y direction, the inner magnet of the pipe is adsorbed by the magnetic force of the external induction magnet, and the welded portion Y of the inner surface of the pipe is attracted. It was easy to navigate to the position.
In the same manner as in Example 1, while supplying 3 to 5 cc of an electrolyte composed of a neutral salt per minute, a current of 2 to 5 A was supplied, and the pipe inner surface welded portion could be burned out in 60 seconds. .
図４に示す直径５０ｍｍ、曲管部までの長さ４ｍのサニタリーパイプについて、パイプ内面Ｘの位置まで電解処理装置を挿入し、実施例２と同様にモップに中性塩の電解液を供給しながら、パイプ外面の磁石をらせん状に旋回させて、磁力によりパイプ内面の電解装置を誘導し、交流または特殊波形電流を荷電してＸからＹの位置までパイプ内面の表面改質並びに不動態化処理を行った。
その後、少し長めに切断した曲管部分について、不動態化度測定装置を用いて、不動態化度を測定したところ、十分不動態化皮膜が形成されていることが確認できた。For the sanitary pipe having a diameter of 50 mm and a length of 4 m up to the curved pipe shown in FIG. 4, an electrolytic treatment apparatus is inserted to the position of the pipe inner surface X, and a neutral salt electrolyte is supplied to the mop as in Example 2. However, the outer surface of the pipe is spirally swung, the electrolysis device on the inner surface of the pipe is induced by the magnetic force, and AC or special waveform current is charged to improve the surface of the inner surface of the pipe from X to Y and passivate it. Processed.
Then, when the degree of passivation was measured for the bent pipe portion cut a little longer using a degree-of-passivation measuring apparatus, it was confirmed that a sufficient passivation film was formed.
Ｐ 長尺パイプ
１ Ｌ字型導電性の電解液供給ノズル
２ 曲面電極
３ リング状の磁石
４ 給液チューブ
５ ワイヤー
６ 保護チューブ
７ モップ
８ パイプ外面の誘導磁石
９ ゴム材
１０ 電源器
１１ 電解液タンク
１２ ポンプP long pipe 1 L-shaped conductive electrolyte supply nozzle 2 curved electrode 3 ring-shaped magnet 4
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| JP2010053728A JP5685743B2 (en) | 2010-02-18 | 2010-02-18 | Electrolytic treatment method for long pipes and inner surfaces of containers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220049801A (en) | 2020-10-15 | 2022-04-22 | 한국조선해양 주식회사 | A pipe internal electrolytic polishing apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102434797B1 (en) * | 2020-08-18 | 2022-08-19 | 조선대학교산학협력단 | Tool device for electrolytic composite processing and polishing |
| KR102434795B1 (en) * | 2020-08-18 | 2022-08-19 | 조선대학교산학협력단 | Electrolytic composite processing and polishing system |
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| JPH03107500A (en) * | 1989-09-22 | 1991-05-07 | Shinko Pantetsuku Service Kk | Electrolytic polishing device for inside surface of upper end plate of vertical type cylindrical vessel |
| JP2957322B2 (en) * | 1991-08-28 | 1999-10-04 | 三愛石油株式会社 | Electric wire and electrode for electrolytic treatment of metal pipe inner surface and electrolytic polishing method |
| JPH09296297A (en) * | 1996-05-07 | 1997-11-18 | Mitsubishi Heavy Ind Ltd | Electrolytic degreasing device |
| JPH10280200A (en) * | 1997-04-03 | 1998-10-20 | Atox:Kk | In-piping electrolytic polishing and decotaminating device |
| JP5035774B2 (en) * | 2007-08-31 | 2012-09-26 | 株式会社ケミカル山本 | How to remove dirt such as weld burn and rust in a stainless steel sealed container |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20220049801A (en) | 2020-10-15 | 2022-04-22 | 한국조선해양 주식회사 | A pipe internal electrolytic polishing apparatus |
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