JPH0325497Y2 - - Google Patents
Info
- Publication number
- JPH0325497Y2 JPH0325497Y2 JP1986133091U JP13309186U JPH0325497Y2 JP H0325497 Y2 JPH0325497 Y2 JP H0325497Y2 JP 1986133091 U JP1986133091 U JP 1986133091U JP 13309186 U JP13309186 U JP 13309186U JP H0325497 Y2 JPH0325497 Y2 JP H0325497Y2
- Authority
- JP
- Japan
- Prior art keywords
- driver
- diameter
- pipes
- joint device
- 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.)
- Expired
Links
- 230000008602 contraction Effects 0.000 claims description 18
- 230000009466 transformation Effects 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 11
- 230000009467 reduction Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 4
- 229910001000 nickel titanium Inorganic materials 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、環状に成形された形状記憶合金を
用い、その熱弾性変態時の縮径変形によつて被接
続配管の端部相互を結合する管継手装置に関し、
さらに詳しくは、被接続配管の端部相互を軸方向
に圧接状態で結合する手段を講じた管継手装置に
係るものである。[Detailed description of the invention] [Industrial application field] This invention uses a shape memory alloy formed into an annular shape, and connects the ends of the pipes to be connected by the diameter-reducing deformation during thermoelastic transformation. Regarding pipe fitting devices,
More specifically, the present invention relates to a pipe joint device that has a means for connecting the end portions of connected pipes to each other in a pressure-contact state in the axial direction.
〔従来の技術〕
一般的に、この種の形状記憶効果を示す合金と
しては、従来から、例えばNi−Ti合金、および
ある種の銅合金などがよく知られている。そして
この形状記憶効果を利用する管継手装置として
も、既に米国レイチエム社から第2図に示すよう
な装置構成が提案されている。[Prior Art] In general, alloys exhibiting this type of shape memory effect include, for example, Ni-Ti alloys and certain copper alloys. As a pipe joint device that utilizes this shape memory effect, a device configuration as shown in FIG. 2 has already been proposed by Raythiem, Inc. of the United States.
すなわち、この第2図従来例に示す管継手装置
の構成において、符号11および12は一対の被
接続配管、11aおよび12aは同上被接続配管
11,12の突合せ端部であり、また、13は耐
蝕性材料を用いて、被接続配管11,12の管径
対応に環状に成形され、かつ密封性、ならびに耐
引抜き性向上のために、内、外両周面に突条部1
3a,13bを形成したライナーであり、さら
に、14は形状記憶合金、例えばNi−Ti合金を
用いて、ライナーの管径対応に環状に成形され、
かつつ予め熱弾性変態、こゝでは低温のマルテン
サイト状態で径方向に拡径され、使用時常温での
オーステナイト状態への移行で、径方向縮径によ
る密封結合のための径方向緊締力を附与したドラ
イバーである。 That is, in the configuration of the pipe fitting device shown in the conventional example in FIG. It is formed into an annular shape using a corrosion-resistant material to correspond to the diameter of the connected pipes 11 and 12, and has protrusions 1 on both the inner and outer peripheral surfaces to improve sealing performance and pull-out resistance.
3a and 13b are formed, and further, 14 is formed into an annular shape corresponding to the pipe diameter of the liner using a shape memory alloy, for example, a Ni-Ti alloy,
At the same time, it undergoes thermoelastic transformation in advance, in which the diameter is expanded in the radial direction in a martensitic state at a low temperature, and when it is used, it transitions to an austenitic state at room temperature, and the radial tightening force for a sealing joint is created by the radial diameter reduction. This is the attached driver.
そして、この従来例による形状記憶合金を用い
た管継手装置の場合には、熱弾性変態を生ずるこ
とのないように、例えば、液体窒素中に浸漬させ
るなどの手段で、−196℃程度までの冷却状態に保
持されている形状記憶合金製のドライバー14を
取出して用い、かつその内部にライナーを介した
状態で、被接続配管11,12の突合せ端部11
a,12aをそれぞれに素早く挿入して突合せ、
これを常温中に放置することによつて昇温させ、
昇温と共にその熱弾性変態に伴なう縮径変形によ
つて、これらの被接続配管11,12の突合せ端
部11a,12aの相互を接続結合させ得るので
ある。 In the case of a pipe joint device using a shape memory alloy according to the conventional example, the pipe fitting device is heated to about -196°C by, for example, immersing it in liquid nitrogen to prevent thermoelastic transformation. Using the shape memory alloy driver 14 kept in a cooled state, and with a liner interposed inside the driver 14, the butt ends 11 of the connected pipes 11 and 12 are removed.
Quickly insert a and 12a into each and match them,
By leaving this at room temperature, the temperature is raised,
The abutting ends 11a and 12a of these connected pipes 11 and 12 can be connected and bonded to each other by the diameter reduction deformation accompanying the thermoelastic transformation as the temperature rises.
しかして、前記従来例での形状記憶合金を用い
た管継手装置においては、その特長として、総合
的にクリーンであること、ガスリークタイトであ
ること、結合のために火気などを全く使用しなく
て済むこと、結合作業が頗る簡単であること、結
合信頼性が高いこと、および高密度配管が可能で
あること、などの各点を挙げ得るのであるが、し
かし一方、形状記憶合金製のドライバーは、昇温
と共に径方向に縮径して、所期の緊締力を発揮す
る反面、この昇温に際しては、通常の場合、軸方
向に幾分か延伸(普通、約0.2%程度)され、そ
の結果として、接合操作時に予め突合せていた被
接続配管11,12相互の突合せ端部11a,1
2a間が離されて〓間15を生ずることになり、
この〓間15の存在のために突合せ端部11a,
12aの付近にあつて、〓間腐食を発生したり、
あるいは異物が付着され易く、使用時に絶対的な
クリーンさが要求されるところの、例えば、半導
体装置製造設備とか、食品加工設備などの配管系
には適用し得ないと云う問題点があつた。
However, the characteristics of the conventional pipe joint device using shape memory alloy are that it is clean overall, is gas leak tight, and does not require the use of fire or the like for connection. However, on the other hand, shape memory alloy drivers As the temperature rises, the diameter contracts in the radial direction and exerts the desired tightening force, but when the temperature rises, there is usually some stretching in the axial direction (usually about 0.2%), and the As a result, the abutted ends 11a, 1 of the connected pipes 11, 12 that had been abutted in advance during the joining operation
The space between 2a is separated and the space 15 is created,
Due to the existence of this gap 15, the abutting ends 11a,
12a, interstitial corrosion may occur,
Another problem is that it cannot be applied to piping systems in semiconductor device manufacturing equipment, food processing equipment, etc., where absolute cleanliness is required during use, as foreign matter tends to adhere thereto.
この考案は従来のこのような問題点を改善する
ためになされたものであつて、その目的とすると
ころは、接続結合時にあつて、被接続配管の突合
せ端部相互間に〓間を生ずる惧れのない、この種
の形状記憶合金を用いた管継手装置を提供するこ
とである。 This invention was made in order to improve these conventional problems, and its purpose is to eliminate the risk of gaps occurring between the butt ends of the pipes to be connected during connection and coupling. It is an object of the present invention to provide a pipe joint device using this type of shape memory alloy, which is free from the problems.
前記目的を達成させるため、この考案に係る管
継手装置においては、形状記憶合金からなるドラ
イバーに対して、熱弾性変態時に、径方向縮径変
形と同時に、軸方向縮長変形を生じさせ得る作用
を与え、縮径による被接続配管の突合せ端部相互
の密封結合に併せて、縮長による突合せ端部相互
の直接、または間接的接圧結合を得られるように
したものである。
In order to achieve the above object, the pipe joint device according to the present invention applies an action that causes the driver made of the shape memory alloy to undergo radial contraction deformation and axial contraction deformation at the same time during thermoelastic transformation. In addition to sealing the abutting ends of the pipes to be connected to each other by reducing the diameter, it is also possible to achieve a direct or indirect contact pressure connection between the abutting ends by reducing the length.
すなわち、この考案では、所期の低温状態から
常温への熱弾性変態によつて、被接続配管の突合
せ端部相互を挿入したドライバーが、縮径ならび
に縮長変形され、縮径による径方向緊締力により
突合せ端部相互の密封結合を、また縮長による軸
方向収縮力により突合せ端部相互の直接、または
間接的接圧結合を、それぞれ同時になし得るので
ある。
In other words, in this device, the driver inserted between the butt ends of the pipes to be connected is deformed by the diameter reduction and length reduction due to thermoelastic transformation from the expected low temperature state to room temperature, and the diameter reduction causes radial tightening. The abutting ends can be simultaneously sealed together by force, and the abutting ends can be directly or indirectly connected by contact pressure to each other by the axial shrinkage force caused by contraction.
以下、この考案に係る管継手装置の一実施例に
つき、第1図を参照して詳細に説明する。
Hereinafter, one embodiment of the pipe joint device according to this invention will be described in detail with reference to FIG. 1.
第1図はこの実施例に係る管継手装置の概要構
成を示し、この第1図実施例装置において、符号
1および2は一対の被接続配管、1aおよび2a
は同上被接続配管1,2の突合せ端部であり、ま
た、3は形状記憶合金、例えばNi−Ti合金を用
いて、被接続配管1,2の管径対応に環状に成形
され、かつ予め熱弾性変態により径方向縮径、な
らびに軸方向縮長変形を生じさせ得るようにした
ドライバーである。 FIG. 1 shows a schematic configuration of a pipe joint device according to this embodiment, and in this device, reference numerals 1 and 2 denote a pair of connected pipes, 1a and 2a
3 is the abutting end of the pipes 1 and 2 to be connected, and 3 is a shape memory alloy, for example, a Ni-Ti alloy, which is formed into an annular shape corresponding to the diameter of the pipes 1 and 2 to be connected, and is formed in advance. This driver is capable of causing radial diameter reduction and axial lengthening deformation through thermoelastic transformation.
すなわち、前記ドライバー3に対しては、低温
のマルテンサイト状態で、径方向への拡大、およ
び軸方向への伸張を与えておき、使用時常温での
オーステナイト状態への移行で、径方向縮径によ
る緊締力、および軸方向縮長による収縮力が働く
ようにするのである。つまり、より一層具体的に
は、まずNi−Ti合金を用いて、切削加工により
ドライバー3を所定形状に仕上げたのち、アルゴ
ン雰囲気中にあつて、400℃の温度で5時間加熱
後水冷却し、ついで、液体窒素中にあつて、径方
向には5%程度拡大させ、かつ軸方向には3%程
度伸張させて形成するのである。 That is, the driver 3 is given expansion in the radial direction and elongation in the axial direction when it is in a martensitic state at a low temperature, and then contracted in the radial direction when it transitions to an austenitic state at room temperature during use. The tightening force due to the axial contraction and the contraction force due to the axial contraction are applied. More specifically, the driver 3 is first cut into a predetermined shape using a Ni-Ti alloy, heated at 400°C for 5 hours in an argon atmosphere, and then cooled with water. Then, in liquid nitrogen, it is expanded by about 5% in the radial direction and expanded by about 3% in the axial direction.
なお、図中、符号4は被接続配管1,2の突合
せ端部1a,1b相互間に、必要に応じて介在さ
せた、例えば軟質のガスケツトパツキンである。 In the figure, reference numeral 4 denotes, for example, a soft gasket packing, which is interposed between the abutting ends 1a and 1b of the connected pipes 1 and 2, if necessary.
従つて、この実施例構成の場合、形状記憶合金
を用いたドライバー3によつて、被接続配管1,
2の突合せ端部1a,2aの相互間を接続結合さ
せるためには、まず、ドライバー3を、一旦、例
えば液体窒素中などにおいて所定温度以下に保持
(マルテンサイト状態)しておき、このドライバ
ー3を適宜、断熱性の把持器具などにより取出し
て、その両端部側から、被接続配管1,2の突合
せ端部1a,2aを直接、または必要に応じてガ
スケツトパツキン4を介在させた上で、それぞれ
に素早く挿入して相互に突合せ、これを常温中に
放置して昇温(オーステナイト状態)させる。 Therefore, in the case of this embodiment configuration, the connected pipes 1,
In order to connect and connect the abutting ends 1a and 2a of the two, first, the driver 3 is held at a predetermined temperature or lower (in a martensitic state) in, for example, liquid nitrogen. Appropriately take it out with a heat-insulating gripping device or the like, and from both ends thereof, connect the abutting ends 1a, 2a of the pipes 1, 2 to be connected directly or with a gasket packing 4 interposed as necessary. , quickly insert them into each other, butt them against each other, and leave them at room temperature to raise the temperature (to an austenitic state).
つまりこの操作によつて、ドライバー3には、
熱弾性変態により径方向縮径、ならびに軸方向縮
長変形を生じ、これらの被接続配管1,2の突合
せ端部1a,2aを、縮径による径方向緊締力で
相互に密封結合させ、かつ同時に縮長による軸方
向収縮力で相互に直接、またはガスケツトパツキ
ン4を介して間接的に接圧結合させ得るのであ
る。すなわち、このようにして、被接続配管1,
2の突合せ端部1a,2aを相互に接圧させた状
態で密封結合させることができ、かつガスケツト
パツキン4の介在によつては、突合せ端部1a,
2a相互の良好なシール作用を得られるのであ
る。 In other words, with this operation, driver 3 has the following:
Thermoelastic transformation causes radial diameter contraction and axial contraction deformation, and the abutting ends 1a and 2a of these connected pipes 1 and 2 are hermetically connected to each other by the radial tightening force caused by the diameter contraction, and At the same time, they can be connected to each other by contact pressure either directly or indirectly through the gasket packing 4 by the axial shrinkage force caused by the contraction. That is, in this way, the connected piping 1,
The abutting ends 1a, 2a of the two can be sealed together in a state where they are brought into contact with each other, and with the interposition of the gasket packing 4, the abutting ends 1a,
A good sealing effect between the two parts can be obtained.
なお、前記ドライバー3の縦断面形状として、
軸方向中央部に比較して両端部側を漸次小径にす
ることも、前記作用、効果を一層顕著にし得る点
で有効である。 Note that the vertical cross-sectional shape of the driver 3 is as follows:
It is also effective to make the diameters of both end portions gradually smaller than that of the central portion in the axial direction, in that the aforementioned functions and effects can be made even more remarkable.
また、前記ドライバー3の軸方向中央部外周面
に、第1図1点鎖線で示すように、断熱性に優れ
たつかみ5を配設しておくと、ドライバー3の昇
温時、ドライバー3の端部から昇温されて被接続
配管1,2をより効果的に引き寄せることができ
る。 Furthermore, if a grip 5 with excellent heat insulation properties is provided on the outer peripheral surface of the axially central portion of the driver 3, as shown by the dashed line in FIG. The temperature is raised from the end, and the connected pipes 1 and 2 can be drawn together more effectively.
以上詳述したようにこの考案によれば、形状記
憶合金を用いて成形されたドライバーを有し、こ
のドライバーの常温中での熱弾性変態による縮径
変形により、各被接続配管の管端部相互を結合す
る管継手装置において、ドライバーに対して、熱
弾性変態時に径方向縮径変形と共に、軸方向縮長
変形を生じさせ得る作用を与えたので、縮径によ
る各被接続配管の突合せ端部相互の密封結合に併
せて、縮長による同突合せ端部相互の直接、また
は間接的接圧結合を得ることができ、特に縮長変
形による収縮力を利用して、各被接続配管の突合
せ端部相互を接圧させるようにしたゝめ、従来例
でのこの種の形状記憶合金を用いたドライバーに
よる管継手装置の場合とは異なつて、各被接続配
管の突合せ端部相互間に〓間などを生ずる惧れを
解消でき、しかも構成自体が簡単で容易に実施し
得るなどの実用上有益な諸効果を有するものであ
る。
As described in detail above, this invention has a driver molded using a shape memory alloy, and the diameter reduction deformation of this driver due to thermoelastic transformation at room temperature causes the pipe end of each connected pipe to In the pipe joint device that connects each other, the driver is given an action that can cause radial contraction deformation and axial contraction deformation during thermoelastic transformation, so that the butt ends of each connected pipe due to diameter contraction are In addition to the sealing connection between the pipes, it is possible to achieve a direct or indirect contact pressure connection between the ends of the same butt due to contraction, and in particular, by using the contraction force caused by the contraction, the butt of each connected piping can be achieved. Since the ends are brought into contact with each other, unlike the conventional pipe joint device using a screwdriver using this type of shape memory alloy, there is no pressure between the butt ends of each pipe to be connected. This has various practical effects, such as being able to eliminate the risk of creating a time lag, and being simple in structure and easy to implement.
第1図はこの考案に係る管継手装置の一実施例
による概要構成を示す断面図であり、また第2図
は同上従来例による管継手装置の概要構成を示す
断面図である。
1,2……被接続配管、1a,2a……被接続
配管の突合せ端部、3……ドライバー、4……ガ
スケツトパツキン。
FIG. 1 is a cross-sectional view showing the general structure of an embodiment of the pipe joint device according to the present invention, and FIG. 2 is a cross-sectional view showing the general structure of the pipe joint device according to the conventional example. 1, 2... Piping to be connected, 1a, 2a... Butt ends of the piping to be connected, 3... Driver, 4... Gasket packing.
Claims (1)
成形され、かつ所期の低温状態から常温への熱
弾性変態によつて縮径変形される形状記憶合金
を用いたドライバーを有し、このドライバーの
縮径変形により、一対の被接続配管の管端部相
互を結合する管継手装置において、前記ドライ
バーに対して、熱弾性変態時に径方向縮径変形
と共に、軸方向縮長変形を生じさせ得る作用を
与え、縮径による被接続配管の突合せ端部相互
の密封結合に併せて、縮長による同突合せ端部
相互の直接、または間接的接圧結合を得るよう
にしたことを特徴とする管継手装置。 (2) 被接続配管の突合せ端部相互間に、ガスケツ
トパツキンを介在させたことを特徴とする実用
新案登録請求の範囲第1項に記載の管継手装
置。[Claims for Utility Model Registration] (1) Shape memory formed into an annular shape corresponding to the diameter of at least the end of the pipe to be connected, and deformed to reduce its diameter by thermoelastic transformation from a desired low temperature state to room temperature. In a pipe joint device that has a driver made of an alloy and connects the pipe ends of a pair of connected pipes to each other by diametrical deformation of the driver, the driver undergoes radial diametrical deformation during thermoelastic transformation. At the same time, it provides an action that can cause axial contraction deformation, and in addition to sealing the butt ends of the connected pipes together by reducing the diameter, direct or indirect contact pressure connection of the butt ends by contraction. A pipe joint device characterized in that it obtains the following. (2) The pipe joint device according to claim 1 of the utility model registration, characterized in that a gasket packing is interposed between the abutting ends of the pipes to be connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986133091U JPH0325497Y2 (en) | 1986-08-29 | 1986-08-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986133091U JPH0325497Y2 (en) | 1986-08-29 | 1986-08-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6340689U JPS6340689U (en) | 1988-03-16 |
JPH0325497Y2 true JPH0325497Y2 (en) | 1991-06-03 |
Family
ID=31033086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986133091U Expired JPH0325497Y2 (en) | 1986-08-29 | 1986-08-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0325497Y2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6267159U (en) * | 1985-10-16 | 1987-04-25 |
-
1986
- 1986-08-29 JP JP1986133091U patent/JPH0325497Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6340689U (en) | 1988-03-16 |
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