JPH04347088A - Pipe joint made of copper shape memory - Google Patents
Pipe joint made of copper shape memoryInfo
- Publication number
- JPH04347088A JPH04347088A JP14977991A JP14977991A JPH04347088A JP H04347088 A JPH04347088 A JP H04347088A JP 14977991 A JP14977991 A JP 14977991A JP 14977991 A JP14977991 A JP 14977991A JP H04347088 A JPH04347088 A JP H04347088A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- shape memory
- memory alloy
- epoxy resin
- pipe joint
- 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.)
- Pending
Links
- 239000010949 copper Substances 0.000 title abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract description 6
- 229910052802 copper Inorganic materials 0.000 title abstract description 6
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 19
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 19
- 230000003446 memory effect Effects 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 description 7
- 238000002845 discoloration Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 229910017777 Cu—Al—Zn Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はＣｕ系形状記憶合金を用
いたパイプ継手に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint using a Cu-based shape memory alloy.
【０００２】0002
【従来の技術】Ｃｕ系形状記憶合金を用いたパイプ継手
は図１に示すようなものが使用されている。図１におい
て、（１） は形状記憶合金、（２） はライナー、（
３） はエポキシ樹脂、（４） は示温塗料である。
Ｃｕ系形状記憶合金は１５０℃以上に加熱すると形状記
憶効果により約４％収縮し、パイプを接続する。ライナ
ーは収縮率の向上とパイプへの順応性を高めるためのも
ので材質は銅またはアルミニウムの２種がある。エポキ
シ樹脂はライナーの内面にコーティングされ、パイプ継
手の耐圧及び引張強度を高め、さらに熱硬化性であるた
め加熱による接続作業中に流動してパイプ表面の傷を埋
めると共に接続強度を向上させる機能を有する。そして
示温塗料はある温度以上で色が変化することにより使用
している形状記憶合金が形状記憶効果を完全に行う温度
までパイプ継手が加熱されたことを示すものである。2. Description of the Related Art A pipe joint using a Cu-based shape memory alloy as shown in FIG. 1 is used. In Figure 1, (1) is a shape memory alloy, (2) is a liner, (
3) is an epoxy resin, and (4) is a temperature-indicating paint. When the Cu-based shape memory alloy is heated to 150° C. or higher, it contracts by about 4% due to the shape memory effect and connects the pipe. Liners are used to improve shrinkage and pipe conformity, and are available in two types: copper or aluminum. Epoxy resin is coated on the inner surface of the liner to increase the pressure resistance and tensile strength of the pipe joint, and because it is thermosetting, it flows during the connection process by heating, filling scratches on the pipe surface and improving the connection strength. have The temperature-indicating paint changes color above a certain temperature, indicating that the pipe joint has been heated to a temperature at which the shape-memory alloy used fully exerts its shape-memory effect.
【０００３】0003
【発明が解決しようとする課題】そしてエポキシ樹脂は
ある温度以上になると炭化され、接着能力が低下し、も
れの原因となるので、エポキシ樹脂の炭化する温度以下
で加熱をやめて接続を完了させねばならない。
しかるに従来は示温塗料が１種類しか用いられておらず
、形状記憶合金の形状記憶効果が行われる温度が示され
るのみであり、加熱し過ぎて、エポキシ樹脂が炭化して
しまう恐れがあり、接続作業に熟練を要していた。[Problem to be solved by the invention] When the temperature exceeds a certain temperature, epoxy resin becomes carbonized, reducing its adhesive ability and causing leakage. Therefore, heating should be stopped below the temperature at which the epoxy resin carbonizes to complete the connection. Must be. However, until now, only one type of temperature-indicating paint has been used, and it only indicates the temperature at which the shape memory effect of the shape memory alloy takes place.There is a risk that the epoxy resin will carbonize due to overheating, and the connection The work required skill.
【０００４】0004
【課題を解決するための手段】本発明はかかる状況に鑑
み鋭意検討の結果、熟練を要さず容易に接続作業のでき
るＣｕ系形状記憶合金パイプ継手を開発したもので、Ｃ
ｕ系形状記憶合金からなるパイプの内面にライナーとエ
ポキシ樹脂層を有し、示温塗料を塗布したＣｕ系形状記
憶合金パイプ継手において、示温塗料が２種または３種
以上塗布され、該示温塗料の少なくとも１種は該Ｃｕ系
形状記憶合金が形状記憶効果により完全に収縮する温度
以上でかつ、エポキシ樹脂が炭化する温度以下の温度（
ｔ１ ℃）で変色し、少なくとも他の１種はｔ１ より
高くかつ、エポキシ樹脂が炭化する温度以下の温度（ｔ
２ ℃）で変色することを特徴とするＣｕ系形状記憶合
金継手である。
ここにおいて、ｔ２ はｔ１ よりも５０℃以上高い方
が望ましい。[Means for Solving the Problems] In view of the above circumstances, the present invention has developed a Cu-based shape memory alloy pipe joint that can be easily connected without requiring any skill, as a result of intensive studies.
In a Cu-based shape memory alloy pipe fitting that has a liner and an epoxy resin layer on the inner surface of a pipe made of a U-based shape memory alloy and is coated with a temperature-indicating paint, two or more types of temperature-indicating paints are applied, and the temperature-indicating paint is At least one type of Cu-based shape memory alloy has a temperature that is higher than the temperature at which the Cu-based shape memory alloy completely contracts due to the shape memory effect and lower than the temperature at which the epoxy resin carbonizes (
At least one other species changes color at a temperature higher than t1 and below the temperature at which the epoxy resin carbonizes (t1 °C).
This is a Cu-based shape memory alloy joint characterized by discoloration at 2°C). Here, it is desirable that t2 is 50° C. or more higher than t1.
【０００５】[0005]
【作用】本発明パイプ継手に接続しようとする２つのパ
イプのそれぞれ端部を挿入してバーナー等で加熱すると
まず、Ｃｕ系形状記憶合金が形状記憶効果を行って収縮
したことを示す示温塗料が変色する。そしてそのまま加
熱を続けると次にエポキシ樹脂の炭化温度より低い温度
で変色する示温塗料が変色する。この変色が生じる前に
加熱を止めれば形状記憶効果は完全に行われ、エポキシ
樹脂も炭化等の劣化も生じてない状態で接続作業を完了
できる。そして前者の変色温度よりも後者の変色温度の
方を５０℃以上高くしておけば加熱しすぎることが少な
く好適である。
両者の示温塗料が変色しない場合は加熱不足である。[Operation] When the ends of the two pipes to be connected to the pipe joint of the present invention are inserted and heated with a burner, etc., the temperature-indicating paint, which indicates that the Cu-based shape memory alloy has undergone a shape memory effect and has contracted, appears. Change color. If heating is continued, the temperature-indicating paint, which changes color at a temperature lower than the carbonization temperature of the epoxy resin, will change color. If heating is stopped before this discoloration occurs, the shape memory effect will be completely achieved, and the connection work can be completed with the epoxy resin free from deterioration such as carbonization. It is preferable to set the latter discoloration temperature to 50° C. or more higher than the former discoloration temperature to prevent excessive heating. If both temperature-indicating paints do not change color, the heating is insufficient.
【０００６】[0006]
【実施例】図１に示すＣｕ系形状記憶合金パイプ継手を
製作するのに形状記憶合金としてＣｕ−Ａｌ−Ｚｎ合金
を用い、ライナーとしては９９．９％の純Ａｌを用い、
ライナー内面にエポキシ樹脂を塗布した。またこのＣｕ
−Ａｌ−Ｚｎ合金は１５０℃以上に加熱すると収縮する
ことおよびエポキシ樹脂は約３００℃で炭化してしまう
ことから、示温塗料として１９０℃で緑から黒へ変色す
る示温塗料Ａと２２０℃で変色する示温塗料Ｂとの２種
類の塗料を図１中の４、４′に示す場所にそれぞれ塗布
した。
この形状記憶合金継手を用いて２本の銅パイプを接続し
、バーナーで加熱し、示温塗料Ａが変色し、示温塗料Ｂ
が変色する前に加熱を止めた。この結果良好な接続状態
が得られた。[Example] To manufacture the Cu-based shape memory alloy pipe joint shown in Fig. 1, a Cu-Al-Zn alloy was used as the shape memory alloy, and 99.9% pure Al was used as the liner.
Epoxy resin was applied to the inner surface of the liner. Also this Cu
-Al-Zn alloy shrinks when heated above 150°C, and epoxy resin carbonizes at about 300°C, so temperature-indicating paint A changes color from green to black at 190°C, and temperature-indicating paint A changes color at 220°C. Two types of paints, including temperature-indicating paint B, were applied to the locations shown at 4 and 4' in FIG. 1, respectively. Two copper pipes are connected using this shape memory alloy joint, heated with a burner, and temperature-indicating paint A changes color, and temperature-indicating paint B changes color.
Heating was stopped before the color changed. As a result, a good connection was obtained.
【０００７】[0007]
【発明の効果】以上述べたように本発明によればパイプ
の接続が熟練を要さず容易にできるもので工業上顕著な
効果を奏する。As described above, according to the present invention, pipes can be easily connected without requiring any skill, and it has a significant industrial effect.
【図１】本発明の構造を示す図。 １ 形状記憶合金 ２ ライナー ３ エポキシ樹脂 ４、４′示温塗料FIG. 1 is a diagram showing the structure of the present invention. 1 Shape memory alloy 2 Liner 3 Epoxy resin 4, 4' temperature indicating paint
Claims (2)
内面にライナーとエポキシ樹脂層を有し、示温塗料を塗
布したＣｕ系形状記憶合金パイプ継手において、示温塗
料が２種または３種以上塗布され、該示温塗料の少なく
とも１種は該Ｃｕ系形状記憶合金が形状記憶効果により
完全に収縮する温度以上でかつ、エポキシ樹脂が炭化す
る温度以下の温度（ｔ１ ℃）で変色し、少なくとも他
の１種はｔ１ より高くかつ、エポキシ樹脂が炭化する
温度以下の温度（ｔ２ ℃）で変色することを特徴とす
るＣｕ系形状記憶合金継手。Claim 1: A Cu-based shape-memory alloy pipe fitting having a liner and an epoxy resin layer on the inner surface of a pipe made of a Cu-based shape-memory alloy and coated with a temperature-indicating paint, in which two or more types of temperature-indicating paints are applied. , at least one of the temperature-indicating paints changes color at a temperature above the temperature at which the Cu-based shape memory alloy completely contracts due to the shape memory effect and below the temperature at which the epoxy resin carbonizes (t1 °C), and at least one of the other temperature-indicating paints A Cu-based shape memory alloy joint characterized by discoloring at a temperature higher than t1 and below the temperature at which epoxy resin carbonizes (t2°C).
徴とする請求項１記載のＣｕ系形状記憶合金パイプ継手
。2. The Cu-based shape memory alloy pipe joint according to claim 1, wherein t2 −t1 ≧50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14977991A JPH04347088A (en) | 1991-05-24 | 1991-05-24 | Pipe joint made of copper shape memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14977991A JPH04347088A (en) | 1991-05-24 | 1991-05-24 | Pipe joint made of copper shape memory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04347088A true JPH04347088A (en) | 1992-12-02 |
Family
ID=15482541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14977991A Pending JPH04347088A (en) | 1991-05-24 | 1991-05-24 | Pipe joint made of copper shape memory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04347088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113715A (en) * | 2005-10-21 | 2007-05-10 | Jfe Pipe Fitting Mfg Co Ltd | Heat-fusion joining method of tube and joint made of thermoplastic resin |
-
1991
- 1991-05-24 JP JP14977991A patent/JPH04347088A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113715A (en) * | 2005-10-21 | 2007-05-10 | Jfe Pipe Fitting Mfg Co Ltd | Heat-fusion joining method of tube and joint made of thermoplastic resin |
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