JP3054284B2 - Hydrophilic treatment equipment for metal tubes - Google Patents
Hydrophilic treatment equipment for metal tubesInfo
- Publication number
- JP3054284B2 JP3054284B2 JP5005094A JP509493A JP3054284B2 JP 3054284 B2 JP3054284 B2 JP 3054284B2 JP 5005094 A JP5005094 A JP 5005094A JP 509493 A JP509493 A JP 509493A JP 3054284 B2 JP3054284 B2 JP 3054284B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- electrode
- metal
- metal tube
- discharge
- 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
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空調用伝熱管等の金属
管の表面親水性を向上させる金属管の親水処理装置に関
し、特にプラズマ放電又はコロナ放電を発生させて金属
管の表面に親水性を付与する金属管の親水処理装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrophilic treatment apparatus for a metal tube, such as a heat transfer tube for air conditioning, which improves the surface hydrophilicity of the metal tube. The present invention relates to an apparatus for hydrophilically treating a metal tube for imparting properties.
【０００２】[0002]
【従来の技術】従来、熱交換器用として所定の管形状に
加工された伝熱管の表面親水性を向上させる表面親水処
理方法としては、以下に示す方法がある。2. Description of the Related Art Conventionally, there are the following methods for surface hydrophilic treatment for improving the surface hydrophilicity of a heat transfer tube processed into a predetermined tube shape for a heat exchanger.
【０００３】（１）機械的研磨法 金属伝熱管の表面をワイヤーブラシ又はサンドペーパ等
で研磨し、管表面に付着しているカーボン等を除去する
ことにより、表面親水性を向上させる。(1) Mechanical polishing method The surface of a metal heat transfer tube is polished with a wire brush or a sandpaper to remove carbon and the like adhering to the tube surface, thereby improving the surface hydrophilicity.
【０００４】（２）表面化学処理法 硫酸及び界面活性剤等により伝熱管表面を洗浄して活性
化させることにより、表面親水性を向上させる。(2) Surface Chemical Treatment Method The surface hydrophilicity is improved by cleaning and activating the heat transfer tube surface with sulfuric acid, a surfactant or the like.
【０００５】（３）熱処理法 金属伝熱管に熱処理を施し、管表面に付着している油分
及びカーボンを変質させて酸化皮膜処理を施すことによ
り、表面親水性を向上させる。(3) Heat treatment method The metal heat transfer tube is subjected to a heat treatment to alter the oil and carbon adhering to the surface of the tube and to perform an oxide film treatment to improve the surface hydrophilicity.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述し
た従来の伝熱管の表面親水処理方法においては、いずれ
もある程度の親水性を得ることはできるものの、十分で
なく、以下に示す問題点がある。However, any of the above-mentioned conventional methods for treating the surface of a heat transfer tube with hydrophilicity can achieve a certain degree of hydrophilicity, but is not sufficient, and has the following problems.
【０００７】機械式研磨法においては、研磨で除去した
カーボン及び油分を含む微粉が伝熱管表面に再付着し
て、表面親水性を阻害する。また、処理直後においては
良好な親水性を得ることができるものの、研磨により露
出した金属伝熱管の表面は周囲の雰囲気の影響を受けや
すい状態であるため、汚れ等が付着して親水性が経時的
に劣化してしまう。[0007] In the mechanical polishing method, fine powder containing carbon and oil removed by polishing is reattached to the surface of the heat transfer tube, thereby impairing the surface hydrophilicity. In addition, although good hydrophilicity can be obtained immediately after the treatment, the surface of the metal heat transfer tube exposed by polishing is easily affected by the surrounding atmosphere, so that stains and the like adhere to the surface and the hydrophilicity is deteriorated with time. Will deteriorate.
【０００８】表面化学処理法においては、酸洗及び水処
理等の設備が必要であり、これらの設備に対するメンテ
ナンスコストが高い。また、一般的に、処理に長時間か
かるため、生産性が悪い。更に、機械式研磨法と同様
に、処理直後においては良好な表面親水性を得ることが
できるものの、親水性が経時的に劣化してしまうという
欠点もある。In the surface chemical treatment method, facilities such as pickling and water treatment are required, and the maintenance cost for these facilities is high. Further, in general, the processing takes a long time, so that the productivity is poor. Further, similarly to the mechanical polishing method, although good surface hydrophilicity can be obtained immediately after the treatment, there is a disadvantage that the hydrophilicity deteriorates with time.
【０００９】熱処理法においては、金属管表面を加工油
の分解温度（通常、300 ℃以上）まで昇温する必要があ
るが、伝熱管として一般的に用いられている銅管の場合
は、処理温度が銅の軟化温度（約 250℃）を超えてしま
うため、機械的強度が低下する。なお、昇温による軟化
を回避するために、金属管表面のみを局部的に火炎にて
加熱するフレーム処理法もあるが、火炎を管周全体に均
一にあてると共に、管を軟化させないように処理するこ
とは困難であり、処理むらが発生しやすい。In the heat treatment method, it is necessary to raise the surface of the metal tube to the decomposition temperature of the processing oil (normally, 300 ° C. or higher). However, in the case of a copper tube generally used as a heat transfer tube, Since the temperature exceeds the softening temperature of copper (about 250 ° C), the mechanical strength decreases. There is also a flame treatment method in which only the surface of the metal tube is locally heated with a flame in order to avoid softening due to temperature rise.However, the flame is uniformly applied to the entire circumference of the tube, and the treatment is performed so as not to soften the tube. It is difficult to perform such processing, and uneven processing is likely to occur.
【００１０】本発明はかかる問題点に鑑みてなされたも
のであって、表面親水性が優れていると共に表面の親水
性の経時的劣化が少ない金属管を得ることができて、且
つ、生産性が良好な金属管の親水処理装置を提供するこ
とを目的とする。[0010] The present invention has been made in view of the above problems, and it is possible to obtain a metal tube having excellent surface hydrophilicity and having little deterioration of the surface hydrophilicity over time, and having a high productivity. It is an object of the present invention to provide a metal pipe hydrophilic treatment apparatus having a good water resistance.
【００１１】[0011]
【課題を解決するための手段】本発明に係る金属管の親
水処理装置は、金属管の表面に連続的に親水処理を施す
金属管の親水処理装置において、その内側に処理すべき
金属管が配設される電極と、前記金属管を前記電極に対
して相対的に移動させる搬送手段と、大気中又は含酸素
雰囲気で前記電極と前記金属管との間に電圧を印加し放
電を発生させる放電発生手段とを有し、前記電極は肉厚
が３乃至６ｍｍの絶縁体内管及びこの内管の外側に嵌合
する金属外管により構成され、前記金属外管の内径Ｄｉ
と前記処理すべき金属管の外径ｄ０との比（Ｄｉ／ｄ
０）が１．５乃至２に設定されていることを特徴とす
る。The metal tube hydrophilic treatment apparatus according to the present invention is a metal tube hydrophilic treatment apparatus for continuously performing a hydrophilic treatment on the surface of a metal tube. An electrode to be provided, a transport means for moving the metal tube relative to the electrode, and an atmosphere or oxygen-containing
A discharge generating means for generating a discharge by applying a voltage between the electrode and the metal tube in an atmosphere, wherein the electrode is fitted to an insulating body tube having a thickness of 3 to 6 mm and an outer side of the inner tube. And an inner diameter Di of the metal outer tube.
And the ratio of the outer diameter d0 of the metal tube to be treated (Di / d
0) is set to 1.5 or 2.
【００１２】[0012]
【作用】本発明においては、搬送手段により金属管を電
極に対し相対的に移動させつつ、放電発生手段により前
記電極と前記金属管との間に電圧を印加して放電（プラ
ズマ放電又はコロナ放電）を発生させる。そうすると、
電圧の印加により、空気中に存在する自由電子が加速さ
れ、この自由電子が空気中の分子との衝突を繰り返し
て、電子なだれ現象が発生する。そして、多数の高エネ
ルギー電子が金属管表面に衝突する。この電子の衝突に
より、金属管の表面に付着したカーボン及び油分等が除
去される所謂スパッタリング作用が発生する。なお、金
属管表面に油分の一部が残留するが、この残留した油分
も、電子の衝突により分子の鎖が切断された状態にな
る。According to the present invention, a discharge (plasma discharge or corona discharge) is performed by applying a voltage between the electrode and the metal tube by the discharge generating device while moving the metal tube relative to the electrode by the transfer means. ). Then,
The application of a voltage accelerates free electrons existing in the air, and the free electrons repeatedly collide with molecules in the air, thereby causing an avalanche phenomenon. Then, many high-energy electrons collide with the surface of the metal tube. The collision of the electrons causes a so-called sputtering action in which carbon, oil and the like attached to the surface of the metal tube are removed. A part of the oil remains on the surface of the metal tube, and the remaining oil is also in a state in which the chains of the molecules are cut by the collision of electrons.
【００１３】また、プラズマ放電又はコロナ放電に伴っ
て、紫外線及びオゾン（Ｏ3 ）が発生する。オゾンは、
フッ素についで酸化性が強い物質である。このオゾンに
より、前述の分子の鎖が切断された有機物分子が酸化さ
れて、疎水基［−ＯＨ］をもつカーボンから親水基［−
Ｃ＝Ｏ］をもつカーボンへ変質する。Further, ultraviolet rays and ozone (O 3 ) are generated with the plasma discharge or corona discharge. Ozone is
It is a highly oxidizable substance after fluorine. This ozone oxidizes the above-mentioned organic molecule in which the chain of the molecule has been cut, and converts the carbon having the hydrophobic group [-OH] to the hydrophilic group [-
C = O].
【００１４】更に、有機物が除去された金属地肌がオゾ
ンと反応して、金属管表面に金属酸化物の皮膜が形成さ
れる。この金属酸化物は、金属単体のような活性がな
く、安定した状態で存在するため、周囲の雰囲気の影響
を受けにくい。Further, the metal surface from which the organic substances have been removed reacts with ozone to form a metal oxide film on the surface of the metal tube. Since this metal oxide does not have the activity of a simple metal and exists in a stable state, it is hardly affected by the surrounding atmosphere.
【００１５】本発明においては、上述の如く、放電によ
るスパッタリング作用と共に、放電により生じるオゾン
の酸化作用を有効に利用して金属管表面に親水性を付与
するため、銅管の機械的強度を劣化させる虞れがなく、
作業性も良好である。また、処理後の金属管表面は金属
酸化物皮膜により被覆されるため、親水性の経時的劣化
が抑制される。In the present invention, as described above, in addition to the sputtering action by the discharge, the oxidizing action of ozone generated by the discharge is effectively used to impart hydrophilicity to the surface of the metal pipe, thereby deteriorating the mechanical strength of the copper pipe. There is no fear of causing
Workability is also good. Further, since the surface of the metal tube after the treatment is covered with the metal oxide film, the deterioration with time of hydrophilicity is suppressed.
【００１６】なお、このような放電処理の効果は、電極
の単位長さ当たりの放電出力が大きいほどよい。即ち、
単位長さ当たりの電子の衝突エネルギーが大きいほど良
好な親水処理面を得ることができる。例えば、電極と被
処理物との間のクリアランスが 0.5乃至１mmと小さい場
合は、放電で放出される電子エネルギーが小さく、電極
長さを長くするか又は処理速度を遅くしなければ、上述
の放電処理の効果を十分に得ることができない。The effect of such a discharge treatment is better as the discharge output per unit length of the electrode is larger. That is,
The higher the collision energy of electrons per unit length, the better the hydrophilic surface can be obtained. For example, when the clearance between the electrode and the object to be processed is as small as 0.5 to 1 mm, the electron energy emitted by the discharge is small, and the above-described discharge is required unless the electrode length is increased or the processing speed is reduced. The effect of the processing cannot be sufficiently obtained.
【００１７】本発明においては、前記電極を絶縁体内管
と金属外管との二重管により構成し、電極の単位長さ当
たりの放電出力を大きくすることを可能とする。この場
合に、絶縁体内管の肉厚が薄いほど放電出力は向上す
る。しかし、絶縁体内管の肉厚が３mm未満であると、絶
縁体内管の局部的な絶縁破壊により短絡が発生しやすく
なる。一方、絶縁体内管の肉厚が６mmを超えると、放電
出力が著しく低下するため、良好な親水性を得ることが
できなくなる。従って、絶縁体内管の肉厚は３乃至６mm
であることが必要である。In the present invention, the electrode is constituted by a double tube of an insulator tube and a metal outer tube, so that the discharge output per unit length of the electrode can be increased. In this case, the discharge output improves as the thickness of the insulating body tube decreases. However, if the thickness of the insulating tube is less than 3 mm, a short circuit is likely to occur due to local insulation breakdown of the insulating tube. On the other hand, if the thickness of the insulating body tube exceeds 6 mm, the discharge output is significantly reduced, so that good hydrophilicity cannot be obtained. Therefore, the thickness of the insulating tube is 3 to 6 mm.
It is necessary to be.
【００１８】また、本発明においては、前記金属外管の
内径Ｄi と処理すべき金属管の外径ｄ0 との比（Ｄi ／
ｄ0 ）を 1.5乃至２とする。Ｄi ／ｄ0 が 1.5未満であ
ると電子の衝突エネルギーが小さくなり、Ｄi ／ｄ0 が
２を超えると電極から金属管表面へ放電が到達しにくく
なるため、いずれの場合も良好な親水性を得ることがで
きない。従って、金属外管の内径Ｄi と処理すべき金属
管の外径ｄ0 との比（Ｄi ／ｄ0 ）を 1.5乃至２とする
ことが必要である。In the present invention, the ratio of the inner diameter Di of the metal outer tube to the outer diameter d0 of the metal tube to be treated (Di /
d0) is set to 1.5 to 2. When Di / d0 is less than 1.5, the collision energy of electrons becomes small, and when Di / d0 exceeds 2, it becomes difficult for the discharge to reach the surface of the metal tube from the electrode. Can not. Therefore, it is necessary to set the ratio (Di / d0) of the inner diameter Di of the metal outer tube to the outer diameter d0 of the metal tube to be treated to 1.5 to 2.
【００１９】[0019]
【実施例】次に、本発明の実施例について添付の図面を
参照して説明する。Next, an embodiment of the present invention will be described with reference to the accompanying drawings.
【００２０】図１は、本発明の実施例に係る金属管の親
水処理装置を示す模式図である。FIG. 1 is a schematic diagram showing an apparatus for hydrophilically treating a metal tube according to an embodiment of the present invention.
【００２１】この親水処理装置は、金属管（銅管）３を
その長さ方向に搬送する接地ロール４ａ，４ｂと、電極
５と、この電極５に高周波の高電圧を供給する電源部と
により構成されている。また、電源部は、交流電源８
と、この交流電源８から電力を供給されて高周波信号を
発生する発振器７と、この発振器７から出力された信号
を昇圧するトランス６とにより構成されている。This hydrophilic treatment apparatus comprises grounding rolls 4a and 4b for transporting a metal tube (copper tube) 3 in its length direction, an electrode 5, and a power supply for supplying a high frequency high voltage to the electrode 5. It is configured. Further, the power supply unit is provided with an AC power supply 8.
And an oscillator 7 supplied with power from the AC power supply 8 to generate a high-frequency signal, and a transformer 6 for boosting a signal output from the oscillator 7.
【００２２】図２は電極５を示す断面図である。この電
極５は、高密度のセラミックスからなる絶縁体内管１
と、この絶縁体内管１の外側に配設されたアルミニウム
等の金属からなる外管２との二重管により形成されてい
る。なお、絶縁体内管１の肉厚は３乃至６mmに設定され
ており、金属外管２の内径Ｄi と金属管３の外径ｄ0 と
の比（Ｄi ／ｄ0 ）は 1.5乃至２に設定されている。FIG. 2 is a sectional view showing the electrode 5. This electrode 5 is made of an insulating tube 1 made of high-density ceramics.
And an outer tube 2 made of a metal such as aluminum disposed outside the insulative body tube 1. The thickness of the insulating tube 1 is set to 3 to 6 mm, and the ratio (Di / d0) of the inner diameter Di of the outer metal tube 2 to the outer diameter d0 of the metal tube 3 is set to 1.5 to 2. I have.
【００２３】次に、本実施例装置を使用した金属管の表
面親水処理方法について説明する。Next, a method for treating the surface of a metal tube for hydrophilicity using the apparatus of this embodiment will be described.
【００２４】金属管３は接地ロール４ａ，４ｂによりそ
の長さ方向に搬送され、電極５内を通過する。この場合
に、金属管３は、接地ロール４ａ，４ｂにより夫々電極
５の両側で支持されるため、振動等が防止されて、電極
５の内面と金属管３の外周面との間の距離が一定に維持
される。そして、電極５と金属管３との間に、トランス
６から高周波の高電圧が印加される。The metal tube 3 is transported in the longitudinal direction by the ground rolls 4a and 4b, and passes through the electrode 5. In this case, since the metal tube 3 is supported on both sides of the electrode 5 by the grounding rolls 4a and 4b, vibration and the like are prevented, and the distance between the inner surface of the electrode 5 and the outer surface of the metal tube 3 is reduced. It is kept constant. Then, a high frequency high voltage is applied from the transformer 6 between the electrode 5 and the metal tube 3.
【００２５】電極５においては、この高電圧によりプラ
ズマ放電又はコロナ放電が発生し、電極５と金属管３と
の間に存在する自由電子が加速され、ガス中の分子を電
離して、電子なだれ現象が発生する。そして、多数の高
エネルギーの電子が金属管３の表面に衝突する。この電
子の衝突により、金属管３の表面に付着している疎水性
の有機物が気化して管表面から離脱する。また、有機物
の一部は管表面に残留するが、この残留した有機物も、
電子の衝突により分子鎖が切断された状態となる。更
に、放電により空気中の酸素が反応してオゾンが発生す
る。このオゾンにより前記分子鎖が切断された有機物が
酸化され、疎水基［−ＣＨ］をもつカーボンから親水基
［−Ｃ＝Ｏ］をもつ親水性カーボンへ変質して、管表面
の疎水性成分が除去される。At the electrode 5, a plasma discharge or a corona discharge is generated by the high voltage, and free electrons existing between the electrode 5 and the metal tube 3 are accelerated to ionize molecules in the gas to avalanche the electrons. The phenomenon occurs. Then, many high-energy electrons collide with the surface of the metal tube 3. Due to the collision of the electrons, the hydrophobic organic substances attached to the surface of the metal tube 3 are vaporized and separated from the tube surface. Also, some of the organic matter remains on the tube surface.
The molecular chain is cut by the collision of electrons. Further, oxygen in the air reacts by the discharge to generate ozone. This ozone oxidizes the organic substance whose molecular chain has been cut, transforms the carbon having a hydrophobic group [—CH] into a hydrophilic carbon having a hydrophilic group [—C ＝ O], and reduces the hydrophobic component on the tube surface. Removed.
【００２６】また、放電により発生したオゾンが電極５
内に滞留し、清浄化された管表面がこのオゾンにより酸
化されて、管表面に酸化皮膜が形成される。この酸化皮
膜は、金属単体のような活性がなく安定した状態で存在
するため、周囲の雰囲気の影響を受けにくくなる。The ozone generated by the discharge is
The ozone oxidizes the cleaned tube surface that stays in the tube and forms an oxide film on the tube surface. Since this oxide film exists in a stable state without activity like a simple metal, it is hardly affected by the surrounding atmosphere.
【００２７】本実施例においては、金属管を連続的に表
面処理することができる。また、本実施例により処理し
た金属管は、その表面の親水性が優れており、且つ、長
時間に亘って親水性を良好な状態で維持することができ
る。更に、本実施例は、従来の化学的方法等による表面
処理方法に比して、処理工程が簡単であり、他の設備と
容易にオンライン化できるため、工程数の削減及び省人
化が可能である。更にまた、従来必要であったフロン及
び有機溶剤による洗浄工程を省略できるという効果を奏
する。In this embodiment, the metal tube can be continuously surface-treated. Further, the metal tube treated according to the present example has excellent hydrophilicity on its surface, and can maintain the hydrophilicity in a favorable state for a long time. Furthermore, in this embodiment, the processing steps are simpler than those of the conventional surface treatment method using a chemical method or the like, and can be easily made online with other equipment, so that the number of steps can be reduced and manpower can be saved. It is. Still further, there is an effect that a washing step using a fluorocarbon and an organic solvent, which has been conventionally required, can be omitted.
【００２８】次に、本発明の実施例に係る親水処理装置
を用いて実際に銅管の表面処理を実施した結果について
その比較例と比較して説明する。Next, results of actual surface treatment of a copper tube using the hydrophilic treatment apparatus according to the embodiment of the present invention will be described in comparison with comparative examples.
【００２９】図１に示す構成の装置を用いて、外径が16
mm、肉厚が0.6mm のりん脱酸銅からなる銅管に親水処理
を施した。即ち、前記銅管を３ｍ／分の一定速度で長さ
が 250mmの電極内を通過させつつ、電極と銅管との間に
14ｋＶの高電圧を印加して放電を発生させた。なお、前
記電極は高密度セラミックス製の内管と金属製の外管と
の二重管により形成されている。下記表１に、絶縁体内
管の内径及び肉厚、金属外管の内径と被処理材である銅
管の外径との比及び電極の単位長さ当たりの出力を示
す。Using the apparatus having the structure shown in FIG.
A copper tube made of phosphorus deoxidized copper having a thickness of 0.6 mm and a thickness of 0.6 mm was subjected to a hydrophilic treatment. That is, the copper tube is passed through the electrode having a length of 250 mm at a constant speed of 3 m / min.
A high voltage of 14 kV was applied to generate a discharge. The electrode is formed by a double tube of an inner tube made of high-density ceramics and an outer tube made of metal. Table 1 below shows the inner diameter and wall thickness of the insulated tube, the ratio of the inner diameter of the metal outer tube to the outer diameter of the copper tube to be processed, and the output per unit length of the electrode.
【００３０】そして、これらの電極を使用した実施例及
び比較例により処理した後の金属管の濡れ指数を、エチ
レングリコールを主体とする濡れ指数試薬により測定し
た。その結果も、表１に併せて示した。Then, the wetting index of the metal tube after the treatment in Examples and Comparative Examples using these electrodes was measured with a wetting index reagent mainly composed of ethylene glycol. The results are also shown in Table 1.
【００３１】[0031]
【表１】 [Table 1]
【００３２】この表１，２から明らかなように、比較例
１，２，４により処理した場合は、電極の単位長さ当た
りの出力が実施例に比して小さいため、管表面の濡れ指
数が小さく、親水性が十分でない。また、比較例３によ
り処理した場合は、電極の単位長さ当たりの出力は大き
く、管表面の濡れ指数も大きいものの、放電開始後短時
間で短絡が生じた。一方、実施例により処理した場合
は、電極の単位長さ当たりの出力が大きいため管表面の
濡れ指数が大きく、良好な親水性を得ることができた。
また、長時間放電しても短絡は発生せず、良好な放電状
態を示した。As is clear from Tables 1 and 2, when the treatment was performed according to Comparative Examples 1, 2 and 4, the output per unit length of the electrode was smaller than that of the embodiment, and therefore, the wetting index of the tube surface was reduced. And the hydrophilicity is not sufficient. In the case of the treatment according to Comparative Example 3, although the output per unit length of the electrode was large and the wettability index of the tube surface was large, short-circuiting occurred shortly after the start of discharge. On the other hand, when the treatment was performed according to the example, the output per unit length of the electrode was large, so that the wetting index of the tube surface was large, and good hydrophilicity could be obtained.
In addition, short-circuit did not occur even after long-time discharge, and a good discharge state was exhibited.
【００３３】[0033]
【発明の効果】以上説明したように本発明に係る金属管
の親水処理装置は、絶縁体内管及び金属外管の二重管か
らなる電極の内側に処理すべき金属管を配設し、放電手
段により前記金属管と前記電極との間に放電を発生させ
て前記金属管表面に親水性を付与するから、表面親水性
が優れていると共に親水性の経時的変化が少なく、空調
用伝熱管として好適の金属管を得ることできる。また、
本発明に係る親水処理装置は、金属管を連続的に処理す
ることが可能であり、作業性が優れている。As described above, the apparatus for hydrophilically treating a metal tube according to the present invention has a metal tube to be treated provided inside an electrode consisting of a double tube of an insulator tube and a metal outer tube, and a discharge tube. Means for generating a discharge between the metal tube and the electrode to impart hydrophilicity to the surface of the metal tube, so that the heat transfer tube for air conditioning has excellent surface hydrophilicity and little change in hydrophilicity over time. A suitable metal tube can be obtained. Also,
ADVANTAGE OF THE INVENTION The hydrophilic processing apparatus which concerns on this invention can process a metal tube continuously, and is excellent in workability | operativity.
【図１】本発明の実施例に係る金属管の親水処理装置を
示す模式図である。FIG. 1 is a schematic view showing an apparatus for hydrophilically treating a metal tube according to an embodiment of the present invention.
【図２】同じくその電極を示す断面図である。FIG. 2 is a sectional view showing the same electrode.
１；絶縁体内管 ２；金属外管 ３；金属管 ４ａ，４ｂ；接地ロール ５；電極 ６；トランス ７；発振器 ８；交流電源 DESCRIPTION OF SYMBOLS 1; Insulated pipe 2; Metal outer pipe 3; Metal pipe 4a, 4b; Ground roll 5; Electrode 6; Transformer 7; Oscillator 8;
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C23G 5/00 C21D 1/38 C21D 9/08 Continuation of front page (58) Field surveyed (Int. Cl. 7 , DB name) C23G 5/00 C21D 1/38 C21D 9/08
Claims (1)
金属管の親水処理装置において、その内側に処理すべき
金属管が配設される電極と、前記金属管を前記電極に対
して相対的に移動させる搬送手段と、大気中又は含酸素
雰囲気で前記電極と前記金属管との間に電圧を印加し放
電を発生させる放電発生手段とを有し、前記電極は肉厚
が３乃至６ｍｍの絶縁体内管及びこの内管の外側に嵌合
する金属外管により構成され、前記金属外管の内径Ｄｉ
と前記処理すべき金属管の外径ｄ０との比（Ｄｉ／ｄ
０）が１．５乃至２に設定されていることを特徴とする
金属管の親水処理装置。1. A metal tube hydrophilic treatment apparatus for continuously subjecting a surface of a metal tube to a hydrophilic treatment, wherein an electrode on which a metal tube to be treated is disposed is provided, and the metal tube is attached to the electrode with respect to the electrode. Conveying means to move relatively, in air or oxygen-containing
A discharge generating means for generating a discharge by applying a voltage between the electrode and the metal tube in an atmosphere, wherein the electrode is fitted to an insulating body tube having a thickness of 3 to 6 mm and an outer side of the inner tube. And an inner diameter Di of the metal outer tube.
And the ratio of the outer diameter d0 of the metal tube to be treated (Di / d
0) is set to 1.5 to 2, wherein the hydrophilic treatment device for a metal tube is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5005094A JP3054284B2 (en) | 1993-01-14 | 1993-01-14 | Hydrophilic treatment equipment for metal tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5005094A JP3054284B2 (en) | 1993-01-14 | 1993-01-14 | Hydrophilic treatment equipment for metal tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06212466A JPH06212466A (en) | 1994-08-02 |
| JP3054284B2 true JP3054284B2 (en) | 2000-06-19 |
Family
ID=11601806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5005094A Expired - Lifetime JP3054284B2 (en) | 1993-01-14 | 1993-01-14 | Hydrophilic treatment equipment for metal tubes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054284B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006194510A (en) * | 2005-01-13 | 2006-07-27 | Sumitomo Light Metal Ind Ltd | Manufacturing method of copper heat transfer pipe for absorption refrigerating machine, and copper heat transfer pipe for absorption refrigerating machine provided by the manufacturing method |
-
1993
- 1993-01-14 JP JP5005094A patent/JP3054284B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06212466A (en) | 1994-08-02 |
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