JPH0771664A - Tube fitting - Google Patents
Tube fittingInfo
- Publication number
- JPH0771664A JPH0771664A JP5215478A JP21547893A JPH0771664A JP H0771664 A JPH0771664 A JP H0771664A JP 5215478 A JP5215478 A JP 5215478A JP 21547893 A JP21547893 A JP 21547893A JP H0771664 A JPH0771664 A JP H0771664A
- Authority
- JP
- Japan
- Prior art keywords
- memory alloy
- shape memory
- pipe
- shape
- 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
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は形状記憶合金を利用した
管継手に関し、特に形状記憶性能を劣化させる環境下に
ある管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint using a shape memory alloy, and more particularly to a pipe joint in an environment where shape memory performance is deteriorated.
【０００２】[0002]
【従来の技術】従来より形状記憶合金を用いた管継手が
知られている。2. Description of the Related Art Conventionally, a pipe joint using a shape memory alloy has been known.
【０００３】これらの管継手は、形状記憶合金よりなる
継手部材をマルテンサイト変態温度以下まで冷却して、
接続されるべき管の直径よりやや大きめにして拡管して
所定位置に配置後、逆変態温度以上に加熱して継手部材
を収縮させて接続するものである。In these pipe joints, a joint member made of a shape memory alloy is cooled to a temperature below the martensitic transformation temperature,
The pipe is expanded to a size slightly larger than the diameter of the pipe to be connected, placed at a predetermined position, and then heated to a temperature higher than the reverse transformation temperature to shrink the joint member for connection.
【０００４】これらの継手の中には、特公昭61−6487号
公報に示されているように、耐食性等の観点から、形状
記憶合金部材と接続される管との間にライナー材を用い
たものや、さらには接続管との接触部に突起のものを設
けて、収縮後に接続管に食い込ませて把持能力を高める
等の工夫がなされている。In these joints, as disclosed in Japanese Patent Publication No. 61-6487, a liner material is used between the shape memory alloy member and the pipe to be connected from the viewpoint of corrosion resistance and the like. It has been devised to provide an object or a protrusion at a contact portion with the connecting pipe so as to bite into the connecting pipe after contraction to enhance gripping ability.
【０００５】[0005]
【発明が解決しようとする課題】しかるに、これら従来
の管継手においては、以下に示すような不都合がある。
すなわち、管継手は、その使用される箇所によっては、
高中性子照射を浴びたり、程度の大きい熱サイクルにさ
らされたりする可能性がある。However, these conventional pipe joints have the following inconveniences.
That is, pipe fittings, depending on where they are used,
It may be exposed to high neutron irradiation and may be exposed to high thermal cycles.
【０００６】形状記憶特性を有する合金は、一般的にこ
れらの厳しい環境におかれた場合、その形状記憶特性が
失われあるいは大幅に劣化するいわゆる記憶ぼけといっ
た現象が知られている。Alloys having shape memory characteristics are generally known to have a phenomenon called so-called memory blurring in which the shape memory characteristics are lost or greatly deteriorated when exposed to these severe environments.
【０００７】従来の管継手においては、この現象につい
て考慮がほとんどされておらず、もし使用中にこの現象
が生じた場合には、継手性能が失われ、最悪の場合には
形状記憶合金部材が滑落し事故につながる可能性があっ
た。In the conventional pipe joint, little consideration is given to this phenomenon. If this phenomenon occurs during use, the joint performance is lost, and in the worst case, the shape memory alloy member is There was a possibility of slipping down and leading to an accident.
【０００８】あるいは、特公平2−203094 号公報に示さ
れているように、継手に接続管よりも硬度の高い突起を
設けて管を塑性変形せしめている例も見受けられるが、
これらの例では突起の製造に手間がかかり継手が高価な
ものになってしまったり、また、接続管の強度が大きく
塑性変形しにくいものにあってはその効果は期待できな
い。Alternatively, as shown in Japanese Examined Patent Publication No. 2-203094, there is an example in which the joint is provided with a protrusion having a hardness higher than that of the connecting pipe to plastically deform the pipe.
In these examples, the production of the protrusions is time-consuming and the joint becomes expensive, and the effect cannot be expected if the connecting pipe has a large strength and is hard to be plastically deformed.
【０００９】本発明の目的は、かかる事故を未然に防止
でき、なおかつ安価である継手部材の滑落防止機構を備
えた継手を提供することにある。An object of the present invention is to provide a joint equipped with a mechanism for preventing slippage of a joint member, which is capable of preventing such accidents and is inexpensive.
【００１０】[0010]
【課題を解決するための手段】すなわち、本発明は、加
熱による形状回復ひずみを利用して管の接続を行う管継
手であって、形状記憶合金部材の加工が比較的容易であ
り、かつ形状記憶合金部材の締結力によらない機構によ
ってその滑落防止をはかったものである。That is, the present invention is a pipe joint in which pipes are connected by utilizing shape recovery strain due to heating, and the shape memory alloy member is relatively easy to process and has a shape. The mechanism that does not depend on the fastening force of the memory alloy member is used to prevent the sliding.
【００１１】[0011]
【作用】形状記憶合金製管継手は、形状回復効果によっ
て締結力を生ずるものである。その締結力は、使用環境
によっては失われる可能性があるがその形状は締結時の
まま保たれる。The function of the shape memory alloy pipe joint is to generate a fastening force by the shape recovery effect. The fastening force may be lost depending on the use environment, but the shape is maintained as it was at the time of fastening.
【００１２】したがって、締結後の管継手部材の形状な
らびに管の形状が機械的に互いに嵌合するものになって
いれば、万一管継手の形状記憶合金部材の締結力が喪失
した場合においても管継手の部材が滑落することがなく
なる。Therefore, if the shape of the pipe joint member and the shape of the pipe after fastening are mechanically fitted to each other, even if the fastening force of the shape memory alloy member of the pipe joint should be lost. The members of the pipe joint will not slip off.
【００１３】[0013]
【実施例】図１に第一の実施例を示す。EXAMPLE FIG. 1 shows a first example.
【００１４】本継手は、形状記憶合金部材３のみからな
り、形状記憶合金部材３は、円筒部３ｂとリング上の突
起３ａとが一体化されて構成されている。The present joint is composed of only the shape memory alloy member 3, and the shape memory alloy member 3 is constituted by integrating the cylindrical portion 3b and the projection 3a on the ring.
【００１５】形状記憶合金部材３の円筒部内径は接続さ
れる管１および管２の外径よりもやや小さめに加工した
後、マルテンサイト変態温度以下まで冷却して管１およ
び管２の外径よりもやや大きめに拡管せしめ、管１およ
び管２の管端に配置しその後直ちに逆変態温度以上に加
熱して収縮させる。The inner diameter of the cylindrical portion of the shape memory alloy member 3 is processed to be slightly smaller than the outer diameters of the pipes 1 and 2 to be connected, and then cooled to a temperature below the martensitic transformation temperature and then the outer diameters of the pipes 1 and 2. The tube is expanded to a size slightly larger than that of the tube 1, placed at the tube ends of the tubes 1 and 2, and immediately thereafter heated to a temperature higher than the reverse transformation temperature to shrink the tube.
【００１６】突起３ａは締結時以降、何らかの要因で継
手の形状記憶特性が失われた後にも管１および管２の間
に位置していることから、形状記憶合金部材３は滑落す
ることがない。Since the protrusion 3a is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factors after the fastening, the shape memory alloy member 3 does not slide down. .
【００１７】突起３ａの高さは、管１および管２の用途
や、配置状況によって選ばれる。内部を流体が通る場合
には突起３ａの高さを接合される管１および管２の肉厚
と等しくしておけば、内部の流体の流れを阻害したり乱
したりすることがない。The height of the projection 3a is selected depending on the use of the pipes 1 and 2 and the arrangement condition. When the fluid passes through the inside, if the height of the protrusion 3a is made equal to the wall thickness of the pipe 1 and the pipe 2 to be joined, the flow of the inside fluid is not disturbed or disturbed.
【００１８】また、内部を通過する物体のガイドチュー
ブである場合には、肉厚以下の高さが選定される。さら
に管１，管２が軸方向に自由に移動できないような設置
状況である場合には、マルテンサイト変態温度以下で拡
管する際に、突起３ａの内径が管１および管２の外径よ
りもやや大きめになるように突起３ａの高さを選定して
おく必要がある。In the case of a guide tube for an object passing through the inside, a height not larger than the wall thickness is selected. Further, when the pipes 1 and 2 are installed so that they cannot freely move in the axial direction, the inner diameter of the protrusion 3a is larger than the outer diameters of the pipes 1 and 2 when the pipes are expanded below the martensitic transformation temperature. It is necessary to select the height of the protrusion 3a so as to be slightly large.
【００１９】なお、本例では突起３ａをリング状とした
が、単数の突起あるいは不連続な複数の突起でも同様な
性能を有することは明らかである。Although the projection 3a has a ring shape in this example, it is clear that a single projection or a plurality of discontinuous projections have the same performance.
【００２０】図２に第二の実施例を示す。FIG. 2 shows a second embodiment.
【００２１】管４ならびに管５は各々管端が加工され、
細経部４ａならびに細経部５ａを有している。The pipe 4 and the pipe 5 each have a machined end.
It has a narrow portion 4a and a narrow portion 5a.
【００２２】円筒上の形状記憶合金部材６は、内径が接
続される管４の細経部４ａおよび管５の細経部５ａの外
径のいずれか小なるものよりもやや小さめに加工した
後、マルテンサイト変態温度以下まで冷却して管４の細
経部４ａおよび管５の細経部５ａの外径のいずれか大な
るものよりもやや大きめに拡管せしめ、管４および管５
の管端に配置しその後直ちに逆変態温度以上に加熱して
収縮させる。The shape memory alloy member 6 on the cylinder is machined to be slightly smaller than the smaller one of the outer diameters of the tapered portion 4a of the pipe 4 and the tapered portion 5a of the pipe 5 to which the inner diameter is connected. The pipe 4 and the pipe 5 are cooled to a temperature below the martensitic transformation temperature and expanded to have a diameter slightly larger than the outer diameter of the tapered portion 4a of the pipe 4 or the outer diameter of the tapered portion 5a of the pipe 5.
It is placed at the end of the tube and heated immediately above the reverse transformation temperature to shrink it.
【００２３】収縮後の形状記憶合金部材６の内径は締結
時以降、何らかの要因で継手の形状記憶特性が失われた
後にも管４及び管５の外径よりも小であることから、形
状記憶合金部材６は滑落することがない。Since the inner diameter of the shape memory alloy member 6 after contraction is smaller than the outer diameters of the pipes 4 and 5 even after the shape memory characteristic of the joint is lost due to some factors after the fastening, the shape memory alloy 6 is memorized. The alloy member 6 does not slip off.
【００２４】本実施例によれば、形状記憶合金部材６の
形状を単純なものとできる。According to this embodiment, the shape memory alloy member 6 can have a simple shape.
【００２５】図３に第三の実施例を示す。FIG. 3 shows a third embodiment.
【００２６】本継手は、３つの形状記憶合金部材７，
８，９ならびに形状記憶合金部材７，８，９と接続され
る管１あるいは管２との間に位置するスリーブ部材１０
から構成されている。This joint comprises three shape memory alloy members 7,
Sleeve member 10 located between pipe 1 or pipe 2 connected to 8, 9 and shape memory alloy members 7, 8, 9
It consists of
【００２７】スリーブ部材１０の内側にはリング上の突
起１０ａが設けられている。また、スリーブ部材１０の
下部外側の形状記憶合金部材９に対応する位置には溝１
０ｂが掘られている。Inside the sleeve member 10, a protrusion 10a on the ring is provided. In addition, the groove 1 is provided at a position corresponding to the shape memory alloy member 9 on the lower outer side of the sleeve member 10.
0b is dug.
【００２８】形状記憶合金部材７は、逆変態温度以上に
加熱されて収縮し管１の上部とスリーブ部材１０の上部
とを締結する。The shape memory alloy member 7 is heated to a temperature higher than the reverse transformation temperature and contracts to fasten the upper part of the tube 1 and the upper part of the sleeve member 10.
【００２９】形状記憶合金部材８は、突起１０ａに対応
した場所に位置し、収縮して突起１０ａを内側へ押し込
む。The shape memory alloy member 8 is located at a position corresponding to the protrusion 10a and contracts to push the protrusion 10a inward.
【００３０】形状記憶合金部材９は、逆変態温度以上に
加熱されて収縮し下部の管２とスリーブ部材１０の下部
とを締結すると同時に形状記憶合金部材９の内面に設け
られたリング上の突起９ａがスリーブ部材１０の下部外
側の溝１０ｂに嵌合する。The shape memory alloy member 9 is heated above the reverse transformation temperature and contracts to fasten the lower tube 2 and the lower portion of the sleeve member 10, and at the same time, a protrusion on a ring provided on the inner surface of the shape memory alloy member 9. 9a fits into the groove 10b on the lower outer side of the sleeve member 10.
【００３１】突起１０ａは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも管１および管２の
間に位置していることから、スリーブ部材１０は滑落す
ることがない。Since the protrusion 10a is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factor after fastening, the sleeve member 10 does not slip off.
【００３２】また、突起９ａも締結時以降、何らかの要
因で継手の形状記憶特性が失われた後にも溝１０ｂに嵌
合していることから、形状記憶合金部材９は滑落するこ
とがない。Further, since the projection 9a is also fitted into the groove 10b even after the shape memory characteristic of the joint is lost due to some factors after the fastening, the shape memory alloy member 9 does not slip off.
【００３３】更に、形状記憶合金部材９より上部に位置
する形状記憶合金部材７ならびに形状記憶合金部材８も
形状記憶合金部材９がストッパーとなり滑落することが
ない。Further, the shape memory alloy member 7 and the shape memory alloy member 8 located above the shape memory alloy member 9 do not slide down because the shape memory alloy member 9 serves as a stopper.
【００３４】突起１０ａの高さは、管１および管２の用
途や、配置状況によって選ばれるのは第一の実施例と同
様である。The height of the projection 10a is selected in accordance with the purpose of use of the pipes 1 and 2 and the arrangement condition thereof, as in the first embodiment.
【００３５】また、スリーブ部材１０の肉厚や材料，突
起１０ａの高さ，形状記憶合金部材７および形状記憶合
金部材９の配置によっては形状記憶合金部材８を省略す
ることも可能である。The shape memory alloy member 8 may be omitted depending on the thickness and material of the sleeve member 10, the height of the protrusion 10a, and the arrangement of the shape memory alloy member 7 and the shape memory alloy member 9.
【００３６】本例によれば、形状記憶合金部材が管の内
部の物体に触れることがないので管の内部を腐食性の物
質が通過する場合でもスリーブ部材１０の材質を適当に
選ぶことによって形状記憶合金部材の腐食を防止するこ
とができる。According to this embodiment, since the shape memory alloy member does not come into contact with the object inside the pipe, even if a corrosive substance passes through the inside of the pipe, the shape of the sleeve member 10 can be appropriately selected by selecting the material. Corrosion of the memory alloy member can be prevented.
【００３７】なお、本例では突起９ａならびに突起１０
ａをリング状としたが、単数の突起あるいは不連続な複
数の突起でも同様な性能を有することは明らかである。In this example, the protrusion 9a and the protrusion 10
Although a has a ring shape, it is clear that a single projection or a plurality of discontinuous projections have the same performance.
【００３８】また、本例では下部に位置する形状記憶合
金部材９のみにスリーブ部材１０との嵌合機能を持たせ
たが、形状記憶合金部材７ならびに形状記憶合金部材８
にも同様な機構を設けることもできる。Further, in this example, only the shape memory alloy member 9 located at the bottom has the function of fitting with the sleeve member 10. However, the shape memory alloy member 7 and the shape memory alloy member 8 are provided.
It is also possible to provide a similar mechanism.
【００３９】図４に第四の実施例を示す。FIG. 4 shows a fourth embodiment.
【００４０】本継手は、３つの形状記憶合金部材１１，
１２，１３ならびに形状記憶合金部材１１，１２，１３
と接続される管１あるいは管２との間に位置するスリー
ブ部材１４から構成されている。This joint comprises three shape memory alloy members 11,
12, 13 and shape memory alloy members 11, 12, 13
It is composed of a sleeve member 14 located between the pipe 1 and the pipe 2 connected to the sleeve member 14.
【００４１】スリーブ部材１４の内側にはリング上の突
起１４ａが設けられている。Inside the sleeve member 14, a projection 14a on the ring is provided.
【００４２】また、スリーブ部材１４の下端部外側には
突起１４ｂが設けられている。形状記憶合金部材１１、
ならびに形状記憶合金部材１３は、逆変態温度以上に加
熱されて収縮し管１とスリーブ部材１４の上部と下部と
を各々を締結する。A protrusion 14b is provided on the outside of the lower end of the sleeve member 14. Shape memory alloy member 11,
In addition, the shape memory alloy member 13 is heated to a temperature higher than the reverse transformation temperature and contracts to fasten the tube 1 and the upper and lower portions of the sleeve member 14 to each other.
【００４３】形状記憶合金部材１２は、突起１４ａに対
応した場所に位置し、収縮して突起１４ａを内側へ押し
込む。The shape memory alloy member 12 is located at a position corresponding to the protrusion 14a and contracts to push the protrusion 14a inward.
【００４４】突起１４ａは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも管１および管２の
間に位置していることから、スリーブ部材１４は滑落す
ることがない。Since the protrusion 14a is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factor after the fastening, the sleeve member 14 does not slip off.
【００４５】また、突起１４ｂは締結時以降、何らかの
要因で継手の形状記憶特性が失われた後にも形状記憶合
金部材１１，１２，１３のストッパーとなり滑落するこ
とがない。Further, the projections 14b do not slide down after they become the stoppers of the shape memory alloy members 11, 12, 13 even after the shape memory characteristics of the joint are lost due to some factors after the fastening.
【００４６】突起１４ａの高さは、管１および管２の用
途や、配置状況によって選ばれるのは第一の実施例と同
様である。The height of the protrusion 14a is selected in accordance with the use of the tubes 1 and 2 and the arrangement condition thereof, as in the first embodiment.
【００４７】また、スリーブ部材１４の肉厚や材料，突
起１４ａの高さ，形状記憶合金部材１１および形状記憶
合金部材１３の配置によっては形状記憶合金部材１２を
省略することも可能である。The shape memory alloy member 12 can be omitted depending on the thickness and material of the sleeve member 14, the height of the protrusion 14a, and the arrangement of the shape memory alloy member 11 and the shape memory alloy member 13.
【００４８】本例によれば、形状記憶合金部材が管の内
部の物体に触れることがないので管の内部を腐食性の物
質が通過する場合でもスリーブ部材１４の材質を適当に
選ぶことによって形状記憶合金部材の腐食を防止するこ
とができる。According to this example, since the shape memory alloy member does not come into contact with an object inside the pipe, even if a corrosive substance passes through the inside of the pipe, the shape of the sleeve member 14 can be appropriately selected. Corrosion of the memory alloy member can be prevented.
【００４９】なお、本例では突起１３ａをリング状とし
たが、単数の突起あるいは不連続な複数の突起でも同様
な性能を有することは明らかである。In this example, the projection 13a has a ring shape, but it is clear that a single projection or a plurality of discontinuous projections have the same performance.
【００５０】また、本例によれば、形状記憶合金部材１
１，１２，１３を単純な円筒形とできるので製造が容易
となる。Further, according to this example, the shape memory alloy member 1
Since 1, 12, 13 can be made into a simple cylindrical shape, the manufacturing becomes easy.
【００５１】図５に第五の実施例を示す。FIG. 5 shows a fifth embodiment.
【００５２】本継手は、３つの形状記憶合金部材１５，
１６，１７ならびに形状記憶合金部材１５，１６，１７
と接続される管１あるいは管２との間に位置するスリー
ブ部材１８から構成されている。This joint comprises three shape memory alloy members 15,
16, 17 and shape memory alloy members 15, 16, 17
It is composed of a sleeve member 18 positioned between the pipe 1 or the pipe 2 connected to the.
【００５３】スリーブ部材１８は上部から下部に向かう
に従って、細径部１８ａ，中径部１８ｂ，太径部１８ｃ
とステップ状の外形を有し、下端部外側には突起１８ｂ
が設けられている。The sleeve member 18 has a small-diameter portion 18a, a medium-diameter portion 18b, and a large-diameter portion 18c as it goes from the upper portion to the lower portion.
Has a stepped outer shape, and a protrusion 18b is provided on the outer side of the lower end.
Is provided.
【００５４】また、スリーブ部材１８の内側にはリング
上の突起１８ｅが設けられている。形状記憶合金部材１
５，１６，１７は、各々スリーブ部材１８の細径部１８
ａ，中径部１８ｂ，太径部１８ｃに対応しており、形状
記憶合金部材１５，１６，１７の収縮前の内径は各々中
径部１８ｂ，太径部１８ｃ，突起１８ｅの外径より小さ
なものとなっている。A ring-shaped protrusion 18e is provided inside the sleeve member 18. Shape memory alloy member 1
5, 16 and 17 are respectively the small diameter portion 18 of the sleeve member 18.
a, the medium diameter portion 18b, and the large diameter portion 18c, and the inner diameters of the shape memory alloy members 15, 16, 17 before contraction are smaller than the outer diameters of the medium diameter portion 18b, the large diameter portion 18c, and the protrusion 18e, respectively. It has become a thing.
【００５５】形状記憶合金部材１６は、突起１８ｄに対
応した場所に位置し、収縮して突起１８ｄを内側へ押し
込む。The shape memory alloy member 16 is located at a position corresponding to the protrusion 18d and contracts to push the protrusion 18d inward.
【００５６】突起１８ｄは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも管１および管２の
間に位置していることから、スリーブ部材１８は滑落す
ることがない。Since the protrusion 18d is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factors after the fastening, the sleeve member 18 does not slip off.
【００５７】また、スリーブ部材１８の外径はステップ
状になっているので、締結時以降、何らかの要因で継手
の形状記憶特性が失われた後にも形状記憶合金部材１
５，１６，１７のストッパーとなり、形状記憶合金部材
１５，１６，１７は滑落することがない。Further, since the outer diameter of the sleeve member 18 is step-shaped, the shape memory alloy member 1 can be used even after the shape memory characteristic of the joint is lost due to some factors after the fastening.
It serves as a stopper for 5, 16 and 17, and the shape memory alloy members 15, 16 and 17 do not slip off.
【００５８】突起１８ｄの高さは、管１および管２の用
途や、配置状況によって選ばれるのは第一の実施例と同
様である。The height of the projection 18d is selected in accordance with the use of the tubes 1 and 2 and the arrangement condition thereof, as in the first embodiment.
【００５９】また、スリーブ部材１８の肉厚や材料，突
起１８ｄの高さ，形状記憶合金部材１５および形状記憶
合金部材１７の配置によっては形状記憶合金部材１６を
省略することも可能である。The shape memory alloy member 16 may be omitted depending on the thickness and material of the sleeve member 18, the height of the protrusion 18d, and the arrangement of the shape memory alloy member 15 and the shape memory alloy member 17.
【００６０】本例によれば、形状記憶合金部材が管の内
部の物体に触れることがないので管の内部を腐食性の物
質が通過する場合でもスリーブ部材１８の材質を適当に
選ぶことによって形状記憶合金部材の腐食を防止するこ
とができる。According to this example, since the shape memory alloy member does not come into contact with an object inside the pipe, even if a corrosive substance passes through the inside of the pipe, the shape of the sleeve member 18 can be appropriately selected by selecting the material. Corrosion of the memory alloy member can be prevented.
【００６１】また、本例では突起１８ｄをリング状とし
たが、単数の突起あるいは不連続な複数の突起でも同様
な性能を有することは明らかである。Although the projection 18d is ring-shaped in this example, it is clear that a single projection or a plurality of discontinuous projections have the same performance.
【００６２】さらに、本例によれば、形状記憶合金部材
１１，１２，１３を単純な円筒形とできるので製造が容
易となる他、収縮施工前の形状記憶合金部材の位置決め
を容易にすることができる利点がある。Furthermore, according to this example, the shape memory alloy members 11, 12, 13 can be formed into a simple cylindrical shape, which facilitates the manufacture and facilitates the positioning of the shape memory alloy member before the contraction construction. There is an advantage that can be.
【００６３】図６に第六の実施例を示す。FIG. 6 shows a sixth embodiment.
【００６４】本継手は、円筒形の形状記憶合金部材１９
ならびに形状記憶合金部材１９と接続される管１あるい
は管２との間に位置するスリーブ部材２０から構成され
ている。This joint is a cylindrical shape memory alloy member 19
And a sleeve member 20 located between the shape memory alloy member 19 and the pipe 1 or the pipe 2 connected thereto.
【００６５】形状記憶合金部材１９には、複数の穴１９
ａが設けられている。スリーブ部材２０は形状記憶合金
部材１９の逆変態温度以上では塑性変形しやすい材質で
できており、施工前は円筒形をしている。The shape memory alloy member 19 has a plurality of holes 19
a is provided. The sleeve member 20 is made of a material that is easily plastically deformed above the reverse transformation temperature of the shape memory alloy member 19, and has a cylindrical shape before the construction.
【００６６】形状記憶合金部材１９が逆変態温度以上に
加熱され収縮する際、スリーブ部材２０も同程度の温度
になり軟化して塑性変形を起こし管１と管２の間隙およ
び形状記憶合金部材１９の穴１９ａに滲出し、施工後に
は内面に張出した突起２０ａならびに外面に張出した突
起２０ｂが形成される。When the shape memory alloy member 19 is heated to a temperature higher than the reverse transformation temperature and contracts, the sleeve member 20 also softens due to softening due to the same temperature, and the gap between the pipes 1 and 2 and the shape memory alloy member 19 are caused. After the construction, a protrusion 20a protruding to the inner surface and a protrusion 20b protruding to the outer surface are formed.
【００６７】突起２０ａは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも管１および管２の
間に位置していることから、スリーブ部材２０は滑落す
ることがない。Since the protrusion 20a is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factors after the fastening, the sleeve member 20 does not slip off.
【００６８】また、突起２０ｂも締結時以降、何らかの
要因で継手の形状記憶特性が失われた後にも形状記憶合
金部材１９の穴１９ａと嵌合を続けることから、形状記
憶合金部材１９は滑落することがない。Further, since the projection 20b also continues to be fitted in the hole 19a of the shape memory alloy member 19 even after the shape memory characteristic of the joint is lost due to some factor after the fastening, the shape memory alloy member 19 slides down. Never.
【００６９】本例によれば、形状記憶合金部材が管の内
部の物体に触れることがないので管の内部を腐食性の物
質が通過する場合でもスリーブ部材２０の材質を適当に
選ぶことによって形状記憶合金部材の腐食を防止するこ
とができる。According to this example, since the shape memory alloy member does not come into contact with an object inside the pipe, even if a corrosive substance passes through the inside of the pipe, the shape of the sleeve member 20 can be appropriately selected by selecting the material. Corrosion of the memory alloy member can be prevented.
【００７０】また、本例ではスリーブ部材２０が充填剤
の役割を果たすので、継手の密封性能が向上する利点が
ある。Further, in this example, since the sleeve member 20 plays a role of the filler, there is an advantage that the sealing performance of the joint is improved.
【００７１】なお、本例では穴１９ａを複数としたが、
単数でも同様な性能を有するのは明らかである。ただ
し、穴１９ａは複数とし何らかの対称性を持たせておく
のが、スリーブ部材２０の変形上好ましい。Although the holes 19a are plural in this example,
It is clear that the singular has similar performance. However, it is preferable in terms of deformation of the sleeve member 20 that the holes 19a are plural and have some symmetry.
【００７２】図７に第七の実施例を示す。FIG. 7 shows a seventh embodiment.
【００７３】本継手は、円筒形の形状記憶合金部材２１
ならびに形状記憶合金部材２１と接続される管１あるい
は管２との間に位置するスリーブ部材２２から構成され
ている。This joint is a cylindrical shape memory alloy member 21.
And a sleeve member 22 located between the shape memory alloy member 21 and the pipe 1 or the pipe 2 connected thereto.
【００７４】スリーブ部材２２は形状記憶合金部材２１
の逆変態温度以上では塑性変形しやすい材質でできてお
り、施工前は円筒形をしている。The sleeve member 22 is the shape memory alloy member 21.
It is made of a material that is easily plastically deformed above the reverse transformation temperature, and has a cylindrical shape before construction.
【００７５】また、スリーブ部材２２の長さは形状記憶
合金部材２１の長さよりも長くなっており、施工時には
形状記憶合金部材２１の上下端から両側にスリーブ部材
２２が張り出すように配置される。Further, the length of the sleeve member 22 is longer than that of the shape memory alloy member 21, and the sleeve member 22 is arranged so as to project from the upper and lower ends of the shape memory alloy member 21 to both sides during construction. .
【００７６】形状記憶合金部材２１が逆変態温度以上に
加熱され収縮する際、スリーブ部材２２も同程度の温度
になり軟化して塑性変形を起こし管１と管２の間隙に滲
出し、施工後には内面に張出した突起２２ｃが形成され
る。When the shape memory alloy member 21 is heated to or above the reverse transformation temperature and contracts, the sleeve member 22 also softens due to softening due to the same temperature, oozing into the gap between the pipe 1 and the pipe 2, and after the construction. Is formed with a protrusion 22c that overhangs the inner surface.
【００７７】また同様に形状記憶合金部材２１の上下に
突起２２ａならびに突起２２ｂが形成される。Similarly, the protrusions 22a and 22b are formed above and below the shape memory alloy member 21.
【００７８】突起２２ｃは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも管１および管２の
間に位置していることから、スリーブ部材２２は滑落す
ることがない。Since the protrusion 22c is located between the pipe 1 and the pipe 2 even after the shape memory characteristic of the joint is lost due to some factor after the fastening, the sleeve member 22 does not slip off.
【００７９】また、突起２２ａならびに突起２２ｂによ
って形状記憶合金部材２１も滑落することがない。Further, the shape memory alloy member 21 does not slip off due to the projections 22a and 22b.
【００８０】本例によれば、形状記憶合金部材が管の内
部の物体に触れることがないので管の内部を腐食性の物
質が通過する場合でもスリーブ部材２０の材質を適当に
選ぶことによって形状記憶合金部材の腐食を防止するこ
とができる。According to this example, since the shape memory alloy member does not come into contact with an object inside the pipe, even if a corrosive substance passes through the inside of the pipe, the shape of the sleeve member 20 can be appropriately selected by selecting the material. Corrosion of the memory alloy member can be prevented.
【００８１】また、本例ではスリーブ部材２０が充填剤
の役割を果たすので、継手の密封性能が向上する利点が
ある。さらに、形状記憶合金部材の形状を単純なものに
することができる。Further, in this example, since the sleeve member 20 plays a role of the filler, there is an advantage that the sealing performance of the joint is improved. Furthermore, the shape of the shape memory alloy member can be made simple.
【００８２】図８及び図９に第八の実施例を示す。An eighth embodiment is shown in FIGS. 8 and 9.
【００８３】本継手は、円筒形の形状記憶合金部材２３
ならびに管１および管２との間に位置し、外周に突起２
４ａを有するリング２４から構成されている。形状記憶
合金部材２３はリング２４の突起２４ａに相当する位置
に嵌合用の穴２３ａを有しており、逆変態温度以上に加
熱され収縮する際、突起２４ａと嵌合する。This joint is a cylindrical shape memory alloy member 23.
And between the pipe 1 and the pipe 2, and a protrusion 2 on the outer periphery.
It consists of a ring 24 with 4a. The shape memory alloy member 23 has a fitting hole 23a at a position corresponding to the projection 24a of the ring 24, and fits with the projection 24a when it is heated to a temperature higher than the reverse transformation temperature and contracts.
【００８４】突起２３ａは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも突起２４ａと嵌合
していることから、形状記憶合金部材２３は滑落するこ
とがない。Since the projections 23a are fitted with the projections 24a even after the shape memory characteristic of the joint is lost due to some factor after fastening, the shape memory alloy member 23 does not slip off.
【００８５】また、形状記憶合金部材２３が滑落しない
のでリング２４も滑落することがない。Further, since the shape memory alloy member 23 does not slide down, the ring 24 does not slide down.
【００８６】図１０及び図１１に第八の実施例の変形例
を示す。10 and 11 show a modification of the eighth embodiment.
【００８７】本継手は、円筒形の形状記憶合金部材２５
ならびに管１および管２との間に位置し、外周に突起２
６ａを有するリング２６から構成されている。This joint is a cylindrical shape memory alloy member 25.
And between the pipe 1 and the pipe 2, and a protrusion 2 on the outer periphery.
It consists of a ring 26 with 6a.
【００８８】形状記憶合金部材２５はリング２６の突起
２６ａに相当する位置に嵌合用の非貫通穴２５ａを有し
ており、逆変態温度以上に加熱され収縮する際、突起２
６ａと嵌合する。The shape memory alloy member 25 has a non-penetrating hole 25a for fitting at a position corresponding to the protrusion 26a of the ring 26, and when the shape memory alloy member 25 is heated to a temperature higher than the reverse transformation temperature and contracts, the protrusion 2
6a is fitted.
【００８９】突起２５ａは締結時以降、何らかの要因で
継手の形状記憶特性が失われた後にも突起２６ａと嵌合
していることから、形状記憶合金部材２５は滑落するこ
とがない。Since the protrusion 25a is fitted with the protrusion 26a even after the shape memory characteristic of the joint is lost due to some factor after the fastening, the shape memory alloy member 25 does not slip off.
【００９０】また、形状記憶合金部材２５が滑落しない
のでリング２６も滑落することがない。Further, since the shape memory alloy member 25 does not slide down, the ring 26 also does not slide down.
【００９１】本例によれば、継手の密封性が要求される
箇所にも適用が可能である。According to this example, the invention can be applied to a place where the sealing property of the joint is required.
【００９２】[0092]
【発明の効果】以上に述べたように、本発明によれば管
継手として構成される形状記憶合金及びスリーブ等の脱
落を防止できる。As described above, according to the present invention, it is possible to prevent the shape memory alloy, the sleeve and the like configured as the pipe joint from falling off.
【図１】本発明の第１の実施例による継手の縦断面図で
ある。FIG. 1 is a vertical sectional view of a joint according to a first embodiment of the present invention.
【図２】本発明の第２の実施例による継手の縦断面図で
ある。FIG. 2 is a vertical sectional view of a joint according to a second embodiment of the present invention.
【図３】本発明の第３の実施例による継手の縦断面図で
ある。FIG. 3 is a vertical sectional view of a joint according to a third embodiment of the present invention.
【図４】本発明の第４の実施例による継手の縦断面図で
ある。FIG. 4 is a vertical sectional view of a joint according to a fourth embodiment of the present invention.
【図５】本発明の第５の実施例による継手の縦断面図で
ある。FIG. 5 is a vertical sectional view of a joint according to a fifth embodiment of the present invention.
【図６】本発明の第６の実施例による継手の縦断面図で
ある。FIG. 6 is a vertical sectional view of a joint according to a sixth embodiment of the present invention.
【図７】本発明の第７の実施例による継手の縦断面図で
ある。FIG. 7 is a vertical sectional view of a joint according to a seventh embodiment of the present invention.
【図８】本発明の第８の実施例による継手の縦断面図で
ある。FIG. 8 is a vertical sectional view of a joint according to an eighth embodiment of the present invention.
【図９】本発明の第８の実施例による継手の横断面図で
ある。FIG. 9 is a cross sectional view of a joint according to an eighth embodiment of the present invention.
【図１０】本発明の第８の実施例の変形例による継手の
縦断面図である。FIG. 10 is a vertical sectional view of a joint according to a modification of the eighth embodiment of the present invention.
【図１１】本発明の第８の実施例の変形例による継手の
横断面図である。FIG. 11 is a cross-sectional view of a joint according to a modification of the eighth embodiment of the present invention.
【符号の説明】 １，２，４，５…管、３，６，７，８，９，１１，１
２，１３，１５，１６，１７，１９，２１，２３，２５
…形状記憶合金部材、３ａ，９ａ,１０ａ,１４ａ，１４
ｂ，１８ｄ，２０ａ，２０ｂ，２２ａ，２２ｂ，２２
ｃ，２４ａ，２６ａ…滑落防止用の突起、３ｂ…円筒
部、４ａ，５ａ，１８ａ…細径部、１０，１４，１８，
２０，２２…スリーブ部材、１８ｂ…中径部、１８ｃ…
太径部、２３ａ，２５ａ…嵌合用穴、２４，２６…リン
グ。[Explanation of reference numerals] 1, 2, 4, 5 ... Tubes, 3, 6, 7, 8, 9, 11, 1
2,13,15,16,17,19,21,23,25
... Shape memory alloy member, 3a, 9a, 10a, 14a, 14
b, 18d, 20a, 20b, 22a, 22b, 22
c, 24a, 26a ... Protrusions for preventing slipping, 3b ... Cylindrical portion, 4a, 5a, 18a ... Small diameter portion 10, 14, 18,
20, 22 ... Sleeve member, 18b ... Medium diameter portion, 18c ...
Large diameter part, 23a, 25a ... Fitting hole, 24, 26 ... Ring.
フロントページの続き (72)発明者 古川 秀康 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 大高 稔 茨城県日立市幸町三丁目２番２号 日立ニ ュークリアエンジニアリング株式会社内(72) Inventor Hideyasu Furukawa 3-1-1, Saiwaicho, Hitachi, Ibaraki Hitachi Ltd. Hitachi factory (72) Minoru Otaka 3-2-2, Saiwaicho, Hitachi, Ibaraki No. within Hitachi Nuclear Engineering Co., Ltd.
Claims (6)
締結を行う形状記憶合金性の管継手であって、加熱によ
る形状回復後に締結されるべき管と滑落防止の嵌合機構
が生じることを特徴とする管継手。1. A shape memory alloy pipe joint for fastening a pipe by utilizing shape recovery strain due to heating, wherein a fitting mechanism for preventing slippage with a pipe to be fastened after shape recovery due to heating. Pipe fittings characterized by.
状回復部材と締結されるべき管との間に位置するスリー
ブ部材とからなる管継手であって、加熱による形状回復
後に締結されるべき管とスリーブ部材との間に滑落防止
の嵌合機構が生じ、かつスリーブ部材と形状回復部材と
の間に滑落防止の嵌合機構が生じることを特徴とする管
継手。2. A pipe joint comprising a shape memory alloy shape recovery member and a sleeve member located between the shape recovery member and a pipe to be fastened, the fastening being performed after the shape is restored by heating. A pipe joint, wherein a fitting mechanism for preventing slippage occurs between the power tube and the sleeve member, and a fitting mechanism for preventing slippage occurs between the sleeve member and the shape recovery member.
れるべき２本の管の間に位置する嵌合用部材とからなる
管継手であって、加熱による形状回復後に嵌合用部材と
形状回復部材との間に滑落防止の嵌合機構が生じること
を特徴とする管継手。3. A pipe joint comprising a shape memory alloy shape recovery member and a fitting member located between two pipes to be fastened, the fitting member and the shape after the shape is recovered by heating. A pipe joint having a fitting mechanism for preventing slippage between the recovery member and the recovery member.
れるべき２本の管の間に位置する嵌合用部材と、上記形
状回復部材と締結されるべき管との間に位置するスリー
ブ部材とからなる管継手であって、加熱による形状回復
後に嵌合用部材とスリーブ部材との間に滑落防止の嵌合
機構が生じ、かつスリーブ部材と形状回復部材との間に
滑落防止の嵌合機構が生じることを特徴とする管継手。4. A shape memory alloy shape recovery member, a fitting member located between two pipes to be fastened, and a sleeve positioned between the shape recovery member and the pipe to be fastened. A pipe joint composed of a member, wherein a fitting mechanism for preventing slippage occurs between the fitting member and the sleeve member after the shape is recovered by heating, and a fitting for slip prevention is provided between the sleeve member and the shape recovery member. A pipe joint characterized by a mechanism.
状回復部材と締結されるべき管との間に位置する塑性変
形部材とからなる管継手であって、加熱による形状回復
にともない塑性変形部材が変形し、形状回復部材滑落防
止の嵌合機構が生じることを特徴とする管継手。5. A pipe joint comprising a shape memory alloy shape recovery member and a plastically deformable member located between the shape recovery member and a pipe to be fastened, wherein the plastic joint is formed by the shape recovery by heating. A pipe joint characterized in that a deformable member is deformed, and a fitting mechanism for preventing slipping of a shape recovery member is generated.
状回復部材と締結されるべき管との間に位置するスリー
ブ部材ならびに塑性変形部材とからなる管継手であっ
て、加熱による形状回復にともない塑性変形部材が変形
し、形状回復部材あるいはスリーブ部材あるいはその双
方の滑落防止嵌合機構が生じることを特徴とする管継
手。6. A pipe joint comprising a shape memory alloy shape recovery member, a sleeve member positioned between the shape recovery member and a pipe to be fastened, and a plastically deformable member, wherein the shape recovery by heating is performed. A pipe joint characterized in that the plastically deformable member is deformed along with this, and a slip-prevention fitting mechanism of the shape recovery member and / or the sleeve member is generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5215478A JPH0771664A (en) | 1993-08-31 | 1993-08-31 | Tube fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5215478A JPH0771664A (en) | 1993-08-31 | 1993-08-31 | Tube fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0771664A true JPH0771664A (en) | 1995-03-17 |
Family
ID=16673048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5215478A Pending JPH0771664A (en) | 1993-08-31 | 1993-08-31 | Tube fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0771664A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032468A (en) * | 2006-07-27 | 2008-02-14 | Hitachi Ltd | Neutron instrumentation tube and method for connecting it |
| JP2013002490A (en) * | 2011-06-14 | 2013-01-07 | Toshiba Corp | Reprocessing pipe joint, and pipe repair method and reprocessing equipment under reprocessing facility environment using the reprocessing pipe joint |
| JP2013056578A (en) * | 2011-09-07 | 2013-03-28 | Nsk Ltd | Electric power steering device and method for manufacturing the same |
| CN113716389A (en) * | 2021-09-08 | 2021-11-30 | 东莞市正润电业科技有限公司 | Untwisted copper foil wire synchronous winding equipment and use method thereof |
-
1993
- 1993-08-31 JP JP5215478A patent/JPH0771664A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032468A (en) * | 2006-07-27 | 2008-02-14 | Hitachi Ltd | Neutron instrumentation tube and method for connecting it |
| JP4648266B2 (en) * | 2006-07-27 | 2011-03-09 | 日立Ｇｅニュークリア・エナジー株式会社 | Neutron measuring tube connection method and replacement method, and neutron measuring tube |
| JP2013002490A (en) * | 2011-06-14 | 2013-01-07 | Toshiba Corp | Reprocessing pipe joint, and pipe repair method and reprocessing equipment under reprocessing facility environment using the reprocessing pipe joint |
| JP2013056578A (en) * | 2011-09-07 | 2013-03-28 | Nsk Ltd | Electric power steering device and method for manufacturing the same |
| CN113716389A (en) * | 2021-09-08 | 2021-11-30 | 东莞市正润电业科技有限公司 | Untwisted copper foil wire synchronous winding equipment and use method thereof |
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