JPS60211289A - Repair of tube - Google Patents
Repair of tubeInfo
- Publication number
- JPS60211289A JPS60211289A JP6805484A JP6805484A JPS60211289A JP S60211289 A JPS60211289 A JP S60211289A JP 6805484 A JP6805484 A JP 6805484A JP 6805484 A JP6805484 A JP 6805484A JP S60211289 A JPS60211289 A JP S60211289A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- tube
- expanded
- heat exchanger
- end part
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は蒸気発生器、熱交換器等の伝熱管の補修方法の
改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for repairing heat exchanger tubes such as steam generators and heat exchangers.
一般に図3に示すような熱交換器1において管板2と伝
熱管3とは密着する様に組立てられている。組立ての工
法として一般には伝熱管を拡管加工する。この拡管法と
しては、図4に示すように、製作時に管板2内の伝熱管
3を管板厚の部分長だけO−9拡管したもの(部分拡管
と称す)と図5に示すように、管板厚全厚にわたりロー
ラ拡管されたもの(全厚拡管と称す)がある。また、部
分拡管された熱交換器においては、管板2と伝熱管30
間に形成される隙間(クレビス)4での液の化学的濃縮
を避けるため、液圧拡管により、管板全厚にわたり拡管
しなおしている(リロール)ものもあり、この場合のお
いて、伝熱管3に損傷5が生じ、管内の流体が管の肉厚
を通過し外側へ(又は逆向に)洩れた場合の対策として
、図6に示すスリーブ補修工法がある。スリーブ補修工
法では損傷5を持つ伝熱管3内にスリーブ6を挿入し、
損傷5をはさんだスリーブ6の上端部7および下端部8
の部分で、伝熱管3とスリーブ6を密着固定させ、気−
密性を確保するものである。上端部7あるいは下端部8
で気密性を得る方法としては、伝熱管が未拡管部あるい
は液圧拡管部の場合は、図7に示すように、スリーブ外
面に円環状突起9を設けておき、これを伝熱管にくい込
ませて気密性を得る方法があり、伝熱管がローラ拡管に
より加工硬化している場合には図8に示すように伝熱管
に溝10を切削加工しておき、平滑スリーブ6を拡管し
て溝に(い込ませ気密性を得る方法がある。また、管板
下端部において、図9た示すようにシール溶接11がさ
れる場合もある。しかしながら、突起付きスリーブ、溝
加工式スリーブ、シール溶接の要素技術をくみ合わせる
事は行なわれておらず、損傷の部位によっては、スリー
ブ補修できない場合もある。Generally, in a heat exchanger 1 as shown in FIG. 3, a tube sheet 2 and a heat exchanger tube 3 are assembled so as to be in close contact with each other. The general method for assembly is to expand the heat transfer tubes. As shown in FIG. 4, this tube expansion method involves expanding the heat exchanger tubes 3 in the tube sheet 2 by O-9 by a partial length equal to the tube sheet thickness during manufacture (referred to as partial tube expansion), and as shown in FIG. , There are tubes expanded by rollers over the entire thickness of the tube plate (referred to as full-thickness tube expansion). In addition, in a partially expanded heat exchanger, the tube sheet 2 and the heat exchanger tubes 30
In order to avoid chemical concentration of liquid in the gap (clevis) 4 formed between the tubes, some tubes are re-expanded over the entire thickness of the tube sheet (re-roll) using hydraulic pressure tube expansion. There is a sleeve repair method shown in FIG. 6 as a countermeasure for when damage 5 occurs in the heat tube 3 and the fluid inside the tube passes through the wall thickness of the tube and leaks to the outside (or in the opposite direction). In the sleeve repair method, a sleeve 6 is inserted into the heat exchanger tube 3 with damage 5,
Upper end 7 and lower end 8 of sleeve 6 with damage 5 in between
The heat exchanger tube 3 and sleeve 6 are tightly fixed at the part shown in FIG.
This is to ensure confidentiality. Upper end 7 or lower end 8
In order to obtain airtightness, if the heat exchanger tube is an unexpanded section or a hydraulically expanded section, as shown in Fig. 7, an annular projection 9 is provided on the outer surface of the sleeve, and this is inserted into the heat exchanger tube. If the heat exchanger tube is work hardened by roller expansion, a groove 10 is cut into the heat exchanger tube as shown in Fig. 8, and a smooth sleeve 6 is expanded to fit the groove. (There is a method to obtain airtightness by inserting the sleeve. Also, seal welding 11 may be done at the lower end of the tube plate as shown in Figure 9. Elemental technologies have not been combined, and depending on the area of damage, it may not be possible to repair the sleeve.
本発明は管板自伝熱管の損傷に対するスリーブ補修方法
の改良を目的とするものであり、伝熱管の管板内損傷に
対するスリーブ補修方法において、伝熱管の拡管状態、
損傷位置を検知し、その条件にもとづき、スリーブ上端
部および同下端部をそれぞれ別個に、円環状突起付きス
リーブの突起を伝熱管内側に食い込ませる方法、または
伝熱管内面に溝加工を施した後平滑スリーブを拡管する
方法、または伝熱管端とスリーブ端をレール溶接する方
法のうちのいずれかの方法により伝熱管に密着固定する
ことを特徴とする管の補修方法を供するものである。The purpose of the present invention is to improve a sleeve repair method for damage to a heat exchanger tube due to heat exchanger tubes.
After detecting the damage position and cutting the protrusions of the sleeve with annular protrusions into the inside of the heat exchanger tube on the upper and lower ends of the sleeve separately, or by cutting grooves on the inner surface of the heat exchanger tube. The present invention provides a method for repairing a tube, which is characterized in that the pipe is tightly fixed to a heat exchanger tube by either expanding a smooth sleeve or rail welding the end of the heat exchanger tube and the end of the sleeve.
以下実施例を示し詳述する。Examples will be shown and explained in detail below.
図1は、ローラ拡管により部分拡管されたものへの適用
例を示す実施例であり、ローラ拡管された下端部分8に
は、伝熱管3に溝加工し、平滑スリーブ6を拡管により
溝10にくい込ませ、液圧拡管された上端部7(あるい
は拡管されていない上端部7)には、スリーブ6外面に
突起9を設けておき、これを伝熱管3にくい込ませる。Fig. 1 shows an example of application to a tube partially expanded by roller expansion.In the lower end portion 8 of the roller expanded tube, a groove is formed in the heat transfer tube 3, and a smooth sleeve 6 is formed into a groove 10 by expanding the tube. A protrusion 9 is provided on the outer surface of the sleeve 6 at the upper end portion 7 which has been hydraulically expanded (or the upper end portion 7 which has not been expanded) and is inserted into the heat transfer tube 3.
図2は、伝熱管3に溝10を加工する方法において、損
傷部位が下端部8の溝加工位置あるいはそれ以下にある
場合の1実施例を示すもので、溝加工が適用できないた
め、スリーブ下端部8先端をシール溶接11する事によ
り、効率的なスリーブ補修を行なうものである。FIG. 2 shows an example of a method for machining grooves 10 in the heat exchanger tube 3, in which the damaged area is at or below the groove machining position of the lower end 8. Since groove machining cannot be applied, the lower end of the sleeve By performing seal welding 11 on the tip of portion 8, efficient sleeve repair is performed.
すなわち本発明方法は、管板自伝熱管の損傷に対するス
リーブ補修工法におけるシール方法として、伝熱管の未
拡管部および液圧拡管部に対しては、図7に示す突起付
きスリーブによりシールし、ローラ拡管部に対しては図
8に示す伝熱管に溝を加工し、平滑スリーブを拡管によ
り溝にくい込ませるシール方法をとり、また、管板下端
のシール方法として、図9に示すシール溶接も損傷位置
によっては用いる等、これらの要素技術を、あらかじめ
検知した伝熱管の拡管状態、損傷位置に応じて最適に組
み合わせるものである。That is, in the method of the present invention, as a sealing method in the sleeve repair method for repairing damage to tube sheet autothermal tubes, the unexpanded portions and hydraulically expanded portions of heat transfer tubes are sealed with a sleeve with protrusions shown in Fig. 7, and roller expansion is performed. For the sealing method shown in Figure 8, a groove is machined in the heat exchanger tube and a smooth sleeve is inserted into the groove by expanding the tube.Also, as a sealing method for the lower end of the tube plate, the seal welding shown in Figure 9 is also applied to the damaged position. These elemental technologies are optimally combined depending on the expanded state of the heat transfer tube and the damage position detected in advance.
したがって、本発明方法は管板自伝熱管のすべての部位
の損傷に対して適用可能であり、時間的に効率の良い信
頼性の高い補修を可能とするものである。Therefore, the method of the present invention is applicable to damage in all parts of the tube sheet autothermal tube, and enables time-efficient and highly reliable repair.
1図は本発明方法による1実施態様を示す説明図、2図
は本発明方法による他の実施態様を示す説明図、3図は
本発明方法を行いる装置の1例の概略図、4図ないし5
図は伝熱管の管板内域付状態と損傷状態の説明図、6図
は管板自伝熱管のスリーブ補修部の概略図、7図ないし
9図は従来の要素技術によるスリーブの密着固定部の説
明図。
2:管板、3:伝熱管、5:損傷、6:スリーブ、9:
突起、10:溝、11:シール溶接口4
V5
6
記8
ンンq1
図7
閉qFigure 1 is an explanatory diagram showing one embodiment of the method of the present invention, Figure 2 is an explanatory diagram showing another embodiment of the method of the present invention, Figure 3 is a schematic diagram of an example of an apparatus for carrying out the method of the present invention, and Figure 4 is an explanatory diagram showing one embodiment of the method of the present invention. or 5
The figure is an explanatory diagram of the state of the heat exchanger tube with the inner region of the tube sheet and the damaged state. Figure 6 is a schematic diagram of the sleeve repair part of the tube sheet autobiographical heat tube. Figures 7 to 9 are the close fixation parts of the sleeve using conventional element technology. Explanatory diagram. 2: Tube sheet, 3: Heat exchanger tube, 5: Damage, 6: Sleeve, 9:
Projection, 10: Groove, 11: Seal weld port 4 V5 6 Note 8 Nnnq1 Figure 7 Closed q
Claims (1)
、伝熱管の拡管状態、損傷位置を検知し、その条件にも
とづき、スリーブ上端部および同下端部をそれぞれ一別
個に、円環状突起付きスリーブの突起を伝熱管内側に食
い込ませる方法、または伝熱管内面に溝加工を施した後
平滑スリーブを拡管する方法、または伝熱管端とスリー
ブ端をシール溶接する方法のうちのいずれかの方法によ
り伝熱管に密着固定することを特徴とする管の補修方法
。In a sleeve repair method for damage in the tube plate of a heat exchanger tube, the expanded state of the heat exchanger tube and the damaged position are detected, and based on the conditions, the upper end and lower end of the sleeve are individually repaired with a protrusion of the sleeve with an annular protrusion. into the heat exchanger tube, by grooving the inner surface of the heat exchanger tube and then expanding a smooth sleeve, or by seal-welding the ends of the heat exchanger tube and sleeve. A pipe repair method characterized by closely fixing the pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6805484A JPS60211289A (en) | 1984-04-05 | 1984-04-05 | Repair of tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6805484A JPS60211289A (en) | 1984-04-05 | 1984-04-05 | Repair of tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60211289A true JPS60211289A (en) | 1985-10-23 |
Family
ID=13362677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6805484A Pending JPS60211289A (en) | 1984-04-05 | 1984-04-05 | Repair of tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60211289A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63153398A (en) * | 1986-11-21 | 1988-06-25 | スタン・アンデユストリイ | Method of repairing or protecting terminal of metallic heat exchanging tube and sleeve used for said method |
-
1984
- 1984-04-05 JP JP6805484A patent/JPS60211289A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63153398A (en) * | 1986-11-21 | 1988-06-25 | スタン・アンデユストリイ | Method of repairing or protecting terminal of metallic heat exchanging tube and sleeve used for said method |
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