JPH1043813A - Manufacture of double heat-transfer tube - Google Patents
Manufacture of double heat-transfer tubeInfo
- Publication number
- JPH1043813A JPH1043813A JP20141296A JP20141296A JPH1043813A JP H1043813 A JPH1043813 A JP H1043813A JP 20141296 A JP20141296 A JP 20141296A JP 20141296 A JP20141296 A JP 20141296A JP H1043813 A JPH1043813 A JP H1043813A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- inner tube
- double heat
- heat transfer
- transfer tube
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/154—Making multi-wall tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/003—Multiple wall conduits, e.g. for leak detection
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高速増殖炉などの
蒸気発生器などに用いられる二重伝熱管の製造方法に関
する。The present invention relates to a method for manufacturing a double heat transfer tube used for a steam generator of a fast breeder reactor or the like.
【０００２】[0002]
【従来の技術】高速増殖炉などの蒸気発生器などに用い
られる二重伝熱管は、図２に示すように、内管１ａと外
管１ｂとの間に金属網などの介在体１ｃを設けることに
より、内管１ａと外管１ｂとの間を効率よく伝熱させな
がらも、これら管１ａ，１ｂの損傷により内部の流体が
漏洩してしまう場合に、当該管１ａ，１ｂ間にヘリウム
などのガスを流通させて損傷箇所を検知することができ
るようになっている。2. Description of the Related Art As shown in FIG. 2, a double heat transfer tube used for a steam generator such as a fast breeder reactor has an intervening body 1c such as a metal net between an inner tube 1a and an outer tube 1b. Thus, when heat is efficiently transferred between the inner pipe 1a and the outer pipe 1b, and the internal fluid leaks due to damage to the pipes 1a and 1b, helium or the like is provided between the pipes 1a and 1b. The gas can be circulated to detect a damaged portion.
【０００３】このような二重伝熱管１は、図３に示すよ
うに、内管１ａの外周に介在体１ｃを装着し、これを外
管１ｂの内部に挿入することにより、内管１ａと外管１
ｂとの間に介在体１ｃを設けたら、必要な寸法となるよ
うにダイスなどで冷間引き抜きして、焼なましや焼もど
しなどの熱処理を施すことにより、これら部材１ａ〜１
ｃ間を金属的に連結して一体化させるようにして製造さ
れている。[0003] In such a double heat transfer tube 1, as shown in Fig. 3, an intervening body 1c is mounted on the outer periphery of an inner tube 1a, and this is inserted into an outer tube 1b, so that the inner tube 1a is connected to the inner tube 1a. Outer tube 1
After the intervening member 1c is provided between the members 1a to 1c, the members 1a to 1c are cold-drawn by a die or the like so as to have a required size and subjected to a heat treatment such as annealing or tempering.
It is manufactured in such a manner that the members c are metallically connected and integrated.
【０００４】[0004]
【発明が解決しようとする課題】前述したようにして製
造された二重伝熱管１を必要とする形状に成形するため
に冷間曲げ加工すると、曲げ半径の違いから、当該管１
ａ，１ｂと介在体１ｃとにずれなどが生じて当該部材１
ａ〜１ｃ間が離れてしまい、当該間の伝熱効率が低下
し、伝熱管としての機能が低下してしまうという問題が
あった。When the double heat transfer tube 1 manufactured as described above is cold-bent to form it into a required shape, due to a difference in the bending radius, the tube 1 is subjected to cold bending.
a, 1b and the intervening body 1c are displaced, etc.
There is a problem in that the distances a to 1c are separated, the heat transfer efficiency during that time is reduced, and the function as a heat transfer tube is reduced.
【０００５】[0005]
【課題を解決するための手段】前述した課題を解決する
ための、本発明による二重伝熱管の製造方法は、内管と
外管との間に介在体を設けた後、熱処理を施すと共に当
該内管と当該外管との間に面圧を付加することを特徴と
する。In order to solve the above-mentioned problems, a method for manufacturing a double heat transfer tube according to the present invention comprises providing an intervening body between an inner tube and an outer tube, performing heat treatment, A surface pressure is applied between the inner pipe and the outer pipe.
【０００６】[0006]
【発明の実施の形態】本発明による二重伝熱管の製造方
法の実施の形態を図１を用いて説明する。なお、図１
は、その説明図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a double heat transfer tube according to the present invention will be described with reference to FIG. FIG.
FIG.
【０００７】まず、従来と同様に、内管１ａの外周に金
属網などの介在体１ｃを装着し、これを外管１ｂの内部
に挿入して内管１ａと外管１ｂとの間に介在体１ｃを設
けた後、図１（ａ）に示すように、必要な寸法よりも所
定量小さい寸法となるようにダイス１１で冷間引き抜き
して縮径して、焼なましや焼もどしなどの熱処理を施す
ことにより、これら部材１ａ〜１ｃ間を金属的に連結し
て一体化させたら、図１（ｂ）に示すように、内管１ａ
の内部にプラグ１２を挿入して拡径することにより、内
管１ａと外管１ｂとの間に面圧を付加して当該管１ａ，
１ｂの間を強力に密着させ、内管１ａの外周面と外管１
ｂの内周面とで介在体１ｃを物理的に挾持させると同時
に、必要な寸法に仕上げ、二重伝熱管１を製造する。First, as in the prior art, an intervening body 1c such as a metal net is attached to the outer periphery of the inner tube 1a and inserted into the outer tube 1b to interpose between the inner tube 1a and the outer tube 1b. After the body 1c is provided, as shown in FIG. 1 (a), it is cold-drawn with a die 11 so as to have a dimension smaller than a required dimension by a predetermined amount, and then reduced in diameter, for example, annealing or tempering. When the members 1a to 1c are metallically connected and integrated by performing the heat treatment described above, as shown in FIG.
By inserting the plug 12 into the inside of the tube and expanding the diameter, a surface pressure is applied between the inner tube 1a and the outer tube 1b to apply the surface pressure.
1b between the outer tube 1a and the outer surface of the inner tube 1a.
At the same time, the intermediate body 1c is physically held between the inner peripheral surface and the inner peripheral surface of the inner heat exchanger b and finished to a required size to manufacture the double heat transfer tube 1.
【０００８】このようにして製造された二重伝熱管１
は、上述したように、上記部材１ａ〜１ｃ間が金属的に
連結しているだけでなく、内管１ａと外管１ｂとが強力
に密着しているので、冷間曲げ加工が施されても、曲げ
半径の違いから上記管１ａ，１ｂと介在体１ｃとの間に
生じるずれを抑えることができ、当該部材１ａ〜１ｃ間
の密着具合を維持することができる。また、介在体１ｃ
が万一ずれてしまっても、内管１ａと外管１ｂとが強力
に密着しているので、これら部材１ａ〜１ｃ間の密着具
合の大幅な低下を抑えることができる。The double heat transfer tube 1 thus manufactured
As described above, not only the members 1a to 1c are metallically connected but also the inner tube 1a and the outer tube 1b are strongly adhered to each other. In addition, it is possible to suppress the displacement occurring between the tubes 1a, 1b and the intervening body 1c due to the difference in the bending radius, and to maintain the close contact between the members 1a to 1c. In addition, the intermediate 1c
Even if they are displaced, the inner tube 1a and the outer tube 1b are strongly in close contact with each other, so that the degree of close contact between these members 1a to 1c can be suppressed from being significantly reduced.
【０００９】したがって、このような二重伝熱管１によ
れば、必要な形状に成形するために冷間曲げ加工を施し
ても、上述したように上記部材１ａ〜１ｃ間の密着具合
を維持または低下抑制することができるので、当該間の
伝熱効率の低下を抑えることができ、伝熱管としての機
能の低下を防止することができる。Therefore, according to such a double heat transfer tube 1, even if cold bending is performed to form it into a required shape, the tightness between the members 1a to 1c is maintained or maintained as described above. Since the decrease can be suppressed, a decrease in the heat transfer efficiency during this period can be suppressed, and a decrease in the function as the heat transfer tube can be prevented.
【００１０】なお、本実施の形態では、内管１ａの内部
にプラグ１２を挿入して拡径することにより、内管１ａ
の外周面と外管１ｂの内周面との間に面圧を負荷するよ
うにしたが、外管１ｂをダイスに挿入して縮径すること
により、内管１ａの外周面と外管１ｂの内周面との間に
面圧を負荷するようにしてもよい。ただし、この場合に
は、必要な寸法よりも所定量大きい寸法となるようにダ
イス１１で冷間引き抜きする。In this embodiment, the inner tube 1a is inserted into the inner tube 1a by expanding the diameter of the inner tube 1a.
A surface pressure is applied between the outer peripheral surface of the inner tube 1 and the inner peripheral surface of the outer tube 1b. However, by inserting the outer tube 1b into a die and reducing its diameter, the outer surface of the inner tube 1a and the outer tube 1b are reduced. A surface pressure may be applied to the inner peripheral surface of the member. However, in this case, the die 11 is cold drawn so as to have a size larger than a required size by a predetermined amount.
【００１１】[0011]
【発明の効果】本発明の二重伝熱管の製造方法によれ
ば、曲げ加工を施しても介在体のずれを抑えて伝熱効率
の低下抑制可能な二重伝熱管を製造することができる。According to the method of manufacturing a double heat transfer tube of the present invention, it is possible to manufacture a double heat transfer tube capable of suppressing a decrease in heat transfer efficiency by suppressing displacement of an intervening body even when bending is performed.
【図１】本発明による二重伝熱管の製造方法の実施の形
態の説明図である。FIG. 1 is an explanatory diagram of an embodiment of a method for manufacturing a double heat transfer tube according to the present invention.
【図２】二重伝熱管の構造を表す一部破断図である。FIG. 2 is a partially cutaway view showing a structure of a double heat transfer tube.
【図３】介在体を装着した内管の外観図である。FIG. 3 is an external view of an inner tube to which an interposition body is attached.
１ 二重伝熱管 １ａ 内管 １ｂ 外管 １ｃ 介在体 １１ ダイス １２ プラグ DESCRIPTION OF SYMBOLS 1 Double heat transfer tube 1a Inner tube 1b Outer tube 1c Intermediate body 11 Dice 12 Plug
Claims (1)
熱処理を施すと共に当該内管と当該外管との間に面圧を
付加することを特徴とする二重伝熱管の製造方法。After providing an intervening body between an inner tube and an outer tube,
A method for manufacturing a double heat transfer tube, comprising performing heat treatment and applying a surface pressure between the inner tube and the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20141296A JPH1043813A (en) | 1996-07-31 | 1996-07-31 | Manufacture of double heat-transfer tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20141296A JPH1043813A (en) | 1996-07-31 | 1996-07-31 | Manufacture of double heat-transfer tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1043813A true JPH1043813A (en) | 1998-02-17 |
Family
ID=16440662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20141296A Withdrawn JPH1043813A (en) | 1996-07-31 | 1996-07-31 | Manufacture of double heat-transfer tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1043813A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100811455B1 (en) | 2006-12-13 | 2008-03-10 | 창원대학교 산학협력단 | Junction method of various pipe |
| WO2012053172A1 (en) * | 2010-10-18 | 2012-04-26 | 住友金属工業株式会社 | Method for manufacturing double pipe having braided wire |
| KR101514051B1 (en) * | 2013-12-13 | 2015-05-20 | 주식회사 성산 | Method manufacturing double heat transfer tube with low finand high fins |
-
1996
- 1996-07-31 JP JP20141296A patent/JPH1043813A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100811455B1 (en) | 2006-12-13 | 2008-03-10 | 창원대학교 산학협력단 | Junction method of various pipe |
| WO2012053172A1 (en) * | 2010-10-18 | 2012-04-26 | 住友金属工業株式会社 | Method for manufacturing double pipe having braided wire |
| US9238258B2 (en) | 2010-10-18 | 2016-01-19 | Nippon Steel & Sumitomo Metal Corporation | Method for producing double-wall tube with braided wires at its interface |
| KR101514051B1 (en) * | 2013-12-13 | 2015-05-20 | 주식회사 성산 | Method manufacturing double heat transfer tube with low finand high fins |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20031007 |