JPH029175Y2 - - Google Patents
Info
- Publication number
- JPH029175Y2 JPH029175Y2 JP1984030596U JP3059684U JPH029175Y2 JP H029175 Y2 JPH029175 Y2 JP H029175Y2 JP 1984030596 U JP1984030596 U JP 1984030596U JP 3059684 U JP3059684 U JP 3059684U JP H029175 Y2 JPH029175 Y2 JP H029175Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- pipes
- shape memory
- connection
- 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.)
- Expired
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 12
- 230000002441 reversible effect Effects 0.000 claims description 7
- 229910010380 TiNi Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006903 response to temperature Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
【考案の詳細な説明】
〔考案の属する技術分野〕
本考案はパイプの接続構造に関し、特に真空排
気用パイプに適した接続構造に関する。[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a pipe connection structure, and particularly to a connection structure suitable for a vacuum exhaust pipe.
従来、真空排気用パイプの接続は、パイプの端
部にフランジ部を形成し、シリコーンゴム等のパ
ツキング（あるいはＯリング）数枚を介して突合
わせ、ボルト、ナツトで締結するというフランジ
接続が一般的である。しかしながら、この接続構
造では、高真空になればなるほど気密性を高める
ためにその締結に熟練を要する。
Conventionally, the connection of vacuum exhaust pipes is generally made by forming a flange at the end of the pipe, butting them together through several packings (or O-rings) made of silicone rubber, etc., and fastening them with bolts and nuts. It is true. However, with this connection structure, the higher the vacuum, the higher the airtightness, which requires skill to connect.
これに対し、最近、形状記憶合金を利用したパ
イプの接続構造が提案されている。この形状記憶
合金によるパイプは温度変化に対し膨張あるいは
収縮するもので、可逆的に膨張、収縮するものも
ある。特に、TiNi合金は、熱弾性マルテンサイ
ト変態の逆変態に付随して顕著な形状記憶効果を
示すことが知られている。（「金属」1966年２月13
日号）
〔考案の目的〕
本考案の主目的は、形状記憶合金によるパイプ
を利用して接続部がコンパクトで高気密性が得ら
れるパイプの接続構造を提供することにある。 In response, recently, pipe connection structures using shape memory alloys have been proposed. Pipes made of this shape memory alloy expand or contract in response to temperature changes, and some can expand or contract reversibly. In particular, TiNi alloys are known to exhibit a remarkable shape memory effect accompanying the reverse transformation of thermoelastic martensitic transformation. (“Metal” February 13, 1966
[Purpose of the invention] The main purpose of the invention is to provide a pipe connection structure that uses a pipe made of a shape memory alloy and has a compact connection part and provides high airtightness.
本考案の他の目的は、接続作業に熟練を要しな
いパイプの接続構造を提供することにある。 Another object of the present invention is to provide a pipe connection structure that does not require skill for connection work.
本考案の更に他の目的は、接続部の着脱が自在
なパイプの接続構造を提供することにある。 Still another object of the present invention is to provide a pipe connection structure in which the connection portion can be freely attached and detached.
本考案は、接続されるべき２つのパイプと、こ
の２つのパイプにわたつてこれらのパイプの内周
に装着されたシールパイプと、このシールパイプ
の内周に装着された可逆性の形状記憶合金製の締
結用パイプとから成るパイプの接続構造である。
ここで、締結用パイプは、接続作業に際してあら
かじめ予想される環境温度範囲外の温度での加熱
あるいは冷却により膨張（あるいは収縮）するも
のが使用される。
The present invention consists of two pipes to be connected, a seal pipe attached to the inner periphery of these two pipes, and a reversible shape memory alloy attached to the inner periphery of the seal pipe. This is a pipe connection structure consisting of a fastening pipe made of
Here, the fastening pipe used is one that expands (or contracts) when heated or cooled at a temperature outside the expected environmental temperature range during the connection work.
第１図は本考案の第１の実施例を断面図で示
す。図において、接続されるべきパイプ１，２の
端部内周面は所定の長さにわたつて一定の深さだ
け切削加工されている。そして、パイプ１，２の
内周には、上記切削加工部にわたるように金属あ
るいは樹脂製の周知のシールリング３が装着され
ている。更に、シールリング３の内周にはこれよ
りやや長めの可逆性形状記憶合金によるパイプ４
が装着されている。このパイプ４は、少なくとも
常用温度範囲内、すなわちあらかじめ予想される
周囲温度の範囲内では膨張した状態にあつてシー
ルリング３を介してパイプ１，２と密接合するよ
うに形状記憶処理された膨張型のものが用いられ
る。したがつて、パイプ１，２の接続は、上記周
囲温度範囲外の低温で直径が収縮状態になるパイ
プ４を使用する場合は、パイプ４をその低温域ま
で冷却してシールリング３の内径より小さな外径
の状態で接続作業を行う。また、上記周囲温度範
囲外の高温で直径が収縮状態になるパイプ４を使
用する場合は、その高温域まで加熱して直径を小
さくした状態で接続作業を行う。このようにし
て、少なくともあらかじめ予想される周囲温度範
囲内では、パイプ４は膨張状態にあり、この状態
では従来のフランジ結合と同等以上のシール効果
が得られることが確認されている。なお、パイプ
１，２の接続を外す場合には、接続部を接続作業
時の温度まで冷却あるいは加熱すれば、パイプ４
の直径が収縮するので容易に外すことができる。
以上のように可逆性形状記憶合金によるパイプの
直径の膨張、収縮は、温度に対し可逆的であり、
くり返しの着脱が可能である。このような形状記
憶合金の材質としては、変形に対する形状回復に
おいて現状のところ最も優れているTiNi合金が
望ましいが、他の例えばCu系形状記憶合金でも
良い。
FIG. 1 shows a first embodiment of the invention in cross-section. In the figure, the inner circumferential surfaces of the ends of pipes 1 and 2 to be connected are cut to a certain depth over a predetermined length. A well-known seal ring 3 made of metal or resin is attached to the inner periphery of the pipes 1 and 2 so as to cover the cut portion. Furthermore, on the inner periphery of the seal ring 3, there is a pipe 4 made of a reversible shape memory alloy that is slightly longer than this.
is installed. This pipe 4 is expanded with shape memory treatment so that it is in an expanded state at least within the normal temperature range, that is, within the range of ambient temperature expected in advance, and is tightly fitted with the pipes 1 and 2 via the seal ring 3. Types are used. Therefore, when connecting the pipes 1 and 2, when using the pipe 4 whose diameter contracts at a low temperature outside the above ambient temperature range, the pipe 4 is cooled to that low temperature range and the inner diameter of the seal ring 3 is lowered. Perform connection work with a small outer diameter. In addition, when using a pipe 4 whose diameter shrinks at a high temperature outside the above-mentioned ambient temperature range, the connection work is performed with the pipe heated to the high temperature range and the diameter reduced. In this way, it has been confirmed that the pipe 4 is in an expanded state at least within the ambient temperature range expected in advance, and that in this state a sealing effect equal to or better than conventional flange connection can be obtained. In addition, when disconnecting pipes 1 and 2, pipe 4 can be removed by cooling or heating the connected part to the temperature at which it will be connected.
It can be easily removed because its diameter shrinks.
As mentioned above, the expansion and contraction of the pipe diameter due to the reversible shape memory alloy is reversible with respect to temperature.
Can be attached and detached repeatedly. As a material for such a shape memory alloy, TiNi alloy is currently the most excellent in terms of shape recovery from deformation, but other types of shape memory alloys, such as Cu-based shape memory alloys, may also be used.
液体移送用のパイプを接続する場合、第１図の
ように、形状記憶合金製パイプをパイプの内側に
装着することは、接続部の内径をパイプ内径より
も小さくし、液体の乱流をきたすことが考えられ
るが、真空排気用パイプの場合、何ら問題がな
い。 When connecting pipes for liquid transfer, installing a shape memory alloy pipe inside the pipe as shown in Figure 1 makes the inner diameter of the connection part smaller than the pipe inner diameter, causing turbulent flow of the liquid. However, in the case of a vacuum exhaust pipe, there is no problem.
本考案の大きな特徴は、接続にフランジ部を要
しないため、フランジ接続方式よりもコンパクト
であり、かつボルト、ナツトの締結が不要で作業
を円滑に行えるという点である。着脱は接続部の
温度制御によつて容易に操作できるため、接続部
に加熱あるいは冷却装置を設けることにより、遠
隔位置からでも容易に着脱操作することが可能で
ある。
The main feature of the present invention is that it is more compact than a flange connection method because no flange is required for connection, and the work can be carried out smoothly without the need to tighten bolts or nuts. Since attachment/detachment can be easily performed by controlling the temperature of the connection portion, by providing a heating or cooling device at the connection portion, attachment/detachment can be easily performed even from a remote location.
また、接続されるパイプの内側にシールパイプ
及び締結用パイプを設けるので、外からこれらの
パイプは見えず、また接続されるパイプは一体的
に接続されるので見栄えが良い。 Furthermore, since the seal pipe and the fastening pipe are provided inside the pipes to be connected, these pipes are not visible from the outside, and the pipes to be connected are integrally connected, so the appearance is good.
第１図は本考案の一実施例の断面図。
図中、１，２は接続されるべきパイプ、３はシ
ールリング、４は可逆性形状記憶合金によるパイ
プ。
FIG. 1 is a sectional view of one embodiment of the present invention. In the figure, 1 and 2 are pipes to be connected, 3 is a seal ring, and 4 is a pipe made of a reversible shape memory alloy.
Claims (1)
プにわたつてこれらのパイプの内周に装着された
シールパイプと、該シールパイプの内周に装着さ
れた可逆性の形状記憶合金製の締結用パイプとか
ら成るパイプの接続構造。 Two pipes to be connected, a seal pipe attached to the inner periphery of these pipes across the two pipes, and a reversible shape memory alloy fastener attached to the inner periphery of the seal pipe. Pipe connection structure consisting of pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3059684U JPS60143983U (en) | 1984-03-05 | 1984-03-05 | Pipe connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3059684U JPS60143983U (en) | 1984-03-05 | 1984-03-05 | Pipe connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60143983U JPS60143983U (en) | 1985-09-24 |
| JPH029175Y2 true JPH029175Y2 (en) | 1990-03-06 |
Family
ID=30530434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3059684U Granted JPS60143983U (en) | 1984-03-05 | 1984-03-05 | Pipe connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60143983U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5044715U (en) * | 1973-08-21 | 1975-05-06 |
-
1984
- 1984-03-05 JP JP3059684U patent/JPS60143983U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60143983U (en) | 1985-09-24 |
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