JPH0434287A - Shape memory alloy joint - Google Patents
Shape memory alloy jointInfo
- Publication number
- JPH0434287A JPH0434287A JP14026090A JP14026090A JPH0434287A JP H0434287 A JPH0434287 A JP H0434287A JP 14026090 A JP14026090 A JP 14026090A JP 14026090 A JP14026090 A JP 14026090A JP H0434287 A JPH0434287 A JP H0434287A
- Authority
- JP
- Japan
- Prior art keywords
- liner
- pipe
- flange
- shape memory
- memory alloy
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 238000003466 welding Methods 0.000 abstract description 7
- 230000008439 repair process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 3
- 229910001000 nickel titanium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、形状記憶合金を用いた継手に関し、特に配管
を接続するフランジ部の補修に好適な形状記憶合金継手
に係るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a joint using a shape memory alloy, and particularly to a shape memory alloy joint suitable for repairing a flange portion that connects pipes.
従来、一般にメカニカルな配管継手は溶接による配管の
接続に比べて、その性能や信頼性が劣るものと考えられ
ていた。しかし米国で開発された形状記憶合金を用いた
継手は、一般のメカニカルな継手がもつ欠点を解消し、
溶接によるパイプ接続と同等な性能が得られ、各分野で
実用化されている。Conventionally, mechanical pipe joints were generally considered to be inferior in performance and reliability compared to pipe connections made by welding. However, joints using shape memory alloys developed in the United States eliminate the drawbacks of general mechanical joints, and
It provides the same performance as pipe connections made by welding, and is being put into practical use in various fields.
上記のような形状記憶合金を継手として用いているのは
、例えば特開昭５０−９３８４７号公報に示されており
、その他にも多くの出願がなされている。The use of the shape memory alloy as described above as a joint is disclosed, for example, in Japanese Patent Laid-Open No. 50-93847, and many other applications have been filed.
この形状記憶合金継手は、形状記憶合金の温度変化によ
る相変態（マルテンサイト相→オーステナイト相）によ
りその内径が収縮するパイプ形状の継手であって、例え
ば第８図に示すように、接続しようとするそれぞれの配
管（１）の端部をライナ（３）を介して形状記憶合金の
継手（２）の両側から挿入しておき、その後これを加熱
して収縮させ、配管を強固に締め付けて接続する構造と
なっている。This shape memory alloy joint is a pipe-shaped joint whose inner diameter contracts due to phase transformation (martensitic phase → austenite phase) caused by temperature changes in the shape memory alloy. Insert the end of each pipe (1) through the liner (3) from both sides of the shape memory alloy joint (2), then heat it to shrink it and firmly tighten the pipes to connect. The structure is such that
一般に継手用の形状記憶合金としてはＮｉ−Ｔｉ系合金
、Ｃｕ−Ｚｎ−Ａｊ！系合金が使用されているが、耐食
性を要求されるような場所ではＮｉ−Ｔｉ系合金が用い
られる。Generally, shape memory alloys for joints include Ni-Ti alloy, Cu-Zn-Aj! Ni-Ti alloys are used in places where corrosion resistance is required.
ところで蒸気、空気、ガス、水、油などの配管を接続す
る溶接式フランジは、板フランジ、ハブフランジ等があ
るが、厳しい環境条件では溶接の影響により第９図に示
すように配管（１）が溶接部（６）付近で破断すること
がある。By the way, welded flanges for connecting piping for steam, air, gas, water, oil, etc. include plate flanges and hub flanges, but under severe environmental conditions, due to the influence of welding, piping (1) may break near the weld (6).
このような事故の補修は非常に難しい、すなわちフラン
ジ（４）内部に破断した配管（１）が残留しており、再
び配管を差込んでフランジに溶接することは熟練した技
術が必要であり、また施工に長時間を要するなどの問題
があった。Repairing such an accident is extremely difficult; in other words, the broken pipe (1) remains inside the flange (4), and it requires a skilled technique to reinsert the pipe and weld it to the flange. Another problem was that construction required a long time.
本発明は上記の問題に鑑みなされたもので、異径の配管
またはフランジ部を接続する作業が容易であり、また特
に上記の溶接式フランジを使用した配管の補修が容易に
かつ確実にできる形状記憶合金を開発したものである。The present invention was made in view of the above problems, and has a shape that facilitates the work of connecting pipes or flanges of different diameters, and in particular allows for easy and reliable repair of pipes using the above-mentioned welded flanges. This is a memory alloy developed.
〔課題を解決するための手段および作用〕本発明は、異
径の配管またはフランジ部を接続するライナを有する形
状記憶合金継手であうで、ライナの径を異径に形成する
と共に、端部に段差もしくは段差と突起を設けたことを
特徴とする形状記憶合金継手である。[Means and effects for solving the problem] The present invention is a shape memory alloy joint having a liner for connecting pipes or flanges of different diameters, in which the diameter of the liner is formed to be different and there is a step at the end. Alternatively, it is a shape memory alloy joint characterized by providing a step and a protrusion.
すなわち本発明は、第１図に示すように配管（１）とフ
ランジ（４）が異なる径を有する配管とフランジを接続
する場合に、ライナ（３）の径を上記の配管およびフラ
ンジの外径に合わせた異径に形成すると共に、ライナの
それぞれの端部にライナの肉厚より薄くなるように内周
に段差（５）を設けたものである。そしてこのライナを
フランジ（４）に差込み、他の一端を配管（１）に差込
んだ後、フランジ部に形状記憶合金からなる継手口）を
嵌合し、加熱し収縮させてフランジ部を接続する。他方
の配管側については通常の溶接によりライナと配管を接
続する。That is, in the present invention, when connecting a pipe and a flange in which the pipe (1) and the flange (4) have different diameters as shown in FIG. The liner is formed to have a different diameter according to the liner, and a step (5) is provided on the inner circumference at each end of the liner so as to be thinner than the liner wall thickness. Then, after inserting this liner into the flange (4) and inserting the other end into the pipe (1), a fitting port made of a shape memory alloy is fitted to the flange, and the flange is connected by heating and shrinking it. do. On the other piping side, the liner and piping are connected by normal welding.
上記の場合、ライナの端部にはライナの肉厚より薄く、
内周に段差が設けられているため、配管やフランジに差
込み易く、ストッパーの役割をなすものである。また肉
厚が薄くなっているため形状記憶合金の締付力をその分
だけ弱くすることができ、合金材料を節約することが可
能である。In the above case, the end of the liner is thinner than the liner wall thickness.
Since there is a step on the inner periphery, it is easy to insert into piping or flanges and acts as a stopper. Furthermore, since the wall thickness is thinner, the tightening force of the shape memory alloy can be reduced accordingly, and the alloy material can be saved.
またライナの端部に設ける段差は、第２図および第３図
に示すように１段目の段差（５）の端部にさらに薄くな
るように２段目の段差（５′）を設けることにより溶接
の際この段差に溶接金属が入り一層溶接部（６）が強固
になる。In addition, as for the step provided at the end of the liner, as shown in FIGS. 2 and 3, a second step (5') is provided at the end of the first step (5) to make it even thinner. During welding, weld metal enters this step, making the welded part (6) even stronger.
また上記の段差は、ライナの一方にのみ設けても良く、
例えば第４図に示すようにライナの配管側は段差を設け
ることなく、形状記憶合金の継手（２）によりライナ（
３）を介して配管（１）と接続することができる。Further, the above step may be provided only on one side of the liner,
For example, as shown in Figure 4, there is no step on the pipe side of the liner, and the liner (
3) can be connected to the pipe (1).
さらに本発明は、第５図〜第７図に示すようにライナ（
３）の端部に段差（５）を設けると共に、この段差部に
内周に沿って突起（７）を設けるものである。Furthermore, the present invention provides a liner (
3) is provided with a step (5) at the end thereof, and a protrusion (7) is provided along the inner circumference of this step.
この突起は、形状記憶合金の締付力により配管もしくは
フランジの外周に食込むようになり機械的にシール性を
高めることができる。This protrusion bites into the outer periphery of the pipe or flange due to the tightening force of the shape memory alloy, thereby mechanically improving sealing performance.
上記のように本発明によれば配管、フランジなどの異径
のものの補修に特に有効なものであるが、補修に限らず
、新たな異径の配管と配管、配管とフランジなどの異径
の接続に適用できる。As described above, the present invention is particularly effective for repairing pipes, flanges, and other pipes with different diameters, but is not limited to repairing pipes and pipes with new different diameters, or pipes and flanges, etc. Applicable to connections.
上記のライナの材質としては配管内部を腐食性の流体あ
るいはガスが流れる場合は、電位差腐食を防ぐため配管
と同材質を用いた方がよい０通常は鉄系、銅系、ステン
レス鋼系、アルミニウム系、その他の合金が使用できる
。Regarding the material of the liner mentioned above, if corrosive fluid or gas flows inside the pipe, it is better to use the same material as the pipe to prevent potential difference corrosion.Normally, iron-based, copper-based, stainless steel-based, or aluminum and other alloys can be used.
また継手に用いられる形状記憶合金としてはＮｉ−Ｔｉ
系合金、Ｃｕ−Ｚｎ−Ａｎ！系合金の他、通常の形状記
憶合金が適用できる。In addition, Ni-Ti is a shape memory alloy used for joints.
system alloy, Cu-Zn-An! In addition to type alloys, ordinary shape memory alloys can be used.
以下に本発明の一実施例について説明する。 An embodiment of the present invention will be described below.
外径４０■φのフランジと５ＬＪＳ３０４製の外径２１
．７■φ（ＪＩＳ規格規格径１５Ａ）の配管において接
続溶接部付近において破断した配管設備について補修を
行った。第５図に示すように形状記憶合金の継手（２）
の材質としてＮｉ−Ｔｉ系合金を用い、その内側に径が
異なると共に端部に段差（５）および突起（７）を設け
たライナ（３）を配して、ライナの端部を配管（１）と
フランジ（４）に差込み、継手口）をトーチガンで１５
０℃に加熱、収縮させて接続した。Flange with outer diameter 40■φ and outer diameter 21 made of 5LJS304
．． Repairs were made to piping equipment that broke near the connection weld in a 7 φ (JIS standard diameter 15A) pipe. Shape memory alloy joint (2) as shown in Figure 5
A liner (3) with different diameters and a step (5) and a protrusion (7) at the end is placed inside the liner (3), and the end of the liner is connected to the pipe (1). ) and flange (4), and connect the joint opening) with a torch gun for 15 minutes.
They were connected by heating to 0°C and shrinking them.
上記の作業時間は約１０分であり通常の溶接による接続
作業の１／３であった。The above work time was about 10 minutes, which was 1/3 of the time required for connection work by ordinary welding.
また上記の継手の特性評価として、水中５ｋｇｒ／ｃｊ
の空気圧を加えリーク試験を行った。さらに１００ｋｇ
ｆ／ｃｍの圧力の水圧試験をして耐圧性を調べた結果、
いずれの試験においても漏洩は認められず継手として信
顛性があることが判った。In addition, as a characteristic evaluation of the above joint, 5 kgr/cj underwater
A leak test was performed by applying an air pressure of . Another 100kg
As a result of conducting a water pressure test at a pressure of f/cm to investigate the pressure resistance,
No leakage was observed in any of the tests, and the joint was found to be reliable.
以上に説明したように本発明によれば、異径の配管ある
いはフランジとの接続が短時間で容易にかつ確実に行う
ことができるもので工業上顕著な効果を奏するものであ
る。As explained above, according to the present invention, connection with pipes or flanges of different diameters can be easily and reliably performed in a short period of time, and this has an industrially significant effect.
第１図および第２図は本発明の形状記憶合金継手を使用
した配管とフランジの接続の例を示す断面図、第３図は
第２図の要部の拡大図、第４図および第５図は本発明の
形状記憶合金継手を使用した配管とフランジの接続の他
の例を示す断面図、第６図および第７図は第５図の要部
の拡大図、第８図は形状記憶合金継手と配管の接続例を
示す断面図、第９図は配管とフランジの破断を示す断面
図である。
ｌ・・・配管、 ２・・・継手、 ３・・・ライナ、４
・・・フランジ、 ５．５′・・・段差。
特許出願人 古河電気工業株式会社液体
７突起
第
第２図
第９図Figures 1 and 2 are cross-sectional views showing examples of connections between piping and flanges using the shape memory alloy joint of the present invention, Figure 3 is an enlarged view of the main parts of Figure 2, and Figures 4 and 5. The figure is a sectional view showing another example of the connection between a pipe and a flange using the shape memory alloy joint of the present invention, Figures 6 and 7 are enlarged views of the main parts of Figure 5, and Figure 8 is a shape memory alloy joint. FIG. 9 is a cross-sectional view showing an example of a connection between an alloy joint and a pipe, and FIG. 9 is a cross-sectional view showing a broken pipe and a flange. l...Piping, 2...Joint, 3...Liner, 4
...flange, 5.5'...step. Patent applicant Furukawa Electric Co., Ltd. Liquid 7 protrusions Figure 2 Figure 9
Claims (1)
る形状記憶合金継手であって、ライナの径を異径に形成
すると共に、端部に段差もしくは段差と突起を設けたこ
とを特徴とする形状記憶合金継手。A shape memory alloy joint having a liner that connects pipes or flange portions of different diameters, the liner having a different diameter and having a step or a step and a protrusion at the end. Alloy fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14026090A JPH0434287A (en) | 1990-05-30 | 1990-05-30 | Shape memory alloy joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14026090A JPH0434287A (en) | 1990-05-30 | 1990-05-30 | Shape memory alloy joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0434287A true JPH0434287A (en) | 1992-02-05 |
Family
ID=15264647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14026090A Pending JPH0434287A (en) | 1990-05-30 | 1990-05-30 | Shape memory alloy joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014526657A (en) * | 2011-09-12 | 2014-10-06 | ザ・ボーイング・カンパニー | Bushing assembly and method for assembling the bushing assembly |
-
1990
- 1990-05-30 JP JP14026090A patent/JPH0434287A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014526657A (en) * | 2011-09-12 | 2014-10-06 | ザ・ボーイング・カンパニー | Bushing assembly and method for assembling the bushing assembly |
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