JPS6060497A - How to ensure airtightness of double tube plate heat exchanger - Google Patents

How to ensure airtightness of double tube plate heat exchanger

Info

Publication number
JPS6060497A
JPS6060497A JP58166650A JP16665083A JPS6060497A JP S6060497 A JPS6060497 A JP S6060497A JP 58166650 A JP58166650 A JP 58166650A JP 16665083 A JP16665083 A JP 16665083A JP S6060497 A JPS6060497 A JP S6060497A
Authority
JP
Japan
Prior art keywords
tube
welding torch
welding
laser
tube plate
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
Application number
JP58166650A
Other languages
Japanese (ja)
Inventor
Tomoyuki Saito
斎藤　知行
Kazuhiko Mitsui
一彦 三井
Sumio Fukuda
福田　澄雄
Keiichi Yasuyoshi
安吉　啓一
Kuniyoshi Hara
原　邦芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58166650A priority Critical patent/JPS6060497A/en
Publication of JPS6060497A publication Critical patent/JPS6060497A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53465—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat said single flat elements being provided with holes facing the tube ends, e.g. for making heat-exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/18—Heat-exchangers or parts thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

PURPOSE:To make a fusion of tube into inside tube plate feasible securing perfect airtight by a method wherein a small welding torch reflecting laser beams only is inserted into inside of a tube. CONSTITUTION:After setting up a tube 3 and a small tube 4, a welding torch for laser welding is inserted into the tube 3. The welding torch with a reflector 5 at the end bends incident laser beams 11 projected in parallel with the axis inside the tube 3 at right angle to a weld 13 to irradiate the same. Besides, the welding torch comprising an optical fiber tube 6, a supporting roller 9 and a turning gear 7 may be driven centering on the axial core by a motor 8. The incident beams 11 projected from a laser oscillator 10 reach the reflector 5 through the intermediay of the optical fiber tube 6 to fuse the tube 3 into an inside tube plate 3 by laser welding process making use of the revolution of the welding torch.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、二重管板構造をもつ熱交換器で問題となる内
側管板とチューブとの間隙の気密性を確保するのに好適
な二重管板形態交換器の気密性確保方法に関するもので
ある。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides two methods suitable for ensuring the airtightness of the gap between the inner tube sheet and the tube, which is a problem in a heat exchanger having a double tube sheet structure. The present invention relates to a method for ensuring airtightness of a heavy tube plate type exchanger.

〔発明の背景〕[Background of the invention]

従来の二重管板構造の熱交換器において、内側管板とチ
ューブとの間隙の気密性を確保する方法としては、機械
式拡管によりチューブを内側管板の管穴に密着させる手
法が採られている。しかしながら、この方法はチューブ
を塑性変形させて管穴に密着させるため、充分な気密性
の確保が困難であり、かつ長時間運転中に密着性が緩和
して内部流体の漏−洩等の事故を発生する。In conventional heat exchangers with a double tube sheet structure, the method of ensuring the airtightness of the gap between the inner tube sheet and the tubes is to use mechanical tube expansion to tightly fit the tubes into the holes in the inner tube sheet. ing. However, since this method plastically deforms the tube to make it fit tightly into the pipe hole, it is difficult to ensure sufficient airtightness, and the tightness weakens during long-term operation, resulting in accidents such as leakage of internal fluid. occurs.

また、内側管板とチューブを融合する方法として従来技
術であるアーク溶接の活用は、（１）チューブ径が小さ
く溶接トーチの挿入が不可、（２）内側管板のため管端
部からの距離が長々、溶接条件のコントロールが不可、
（３）溶接継手が円周継手となりチューブ軸と直角にな
るためアーク電極の設置が不可、（４）チューブ板厚が
薄く、小人熱量集中入熱形の溶接が必要、等の理由から
活用不可能である。In addition, the use of arc welding, which is a conventional technique to fuse the inner tube sheet and the tube, has two drawbacks: (1) the tube diameter is small, making it impossible to insert a welding torch, and (2) the distance from the tube end because it is an inner tube sheet. The process takes a long time, making it impossible to control welding conditions.
(3) The welding joint becomes a circumferential joint and is perpendicular to the tube axis, making it impossible to install an arc electrode. (4) The tube plate is thin and requires welding with a concentrated heat input type. It's impossible.

〔釦明の目的〕[Purpose of Buttonmei]

本発明は、二重管板構造の熱交換器において内側管板と
チューブとの間隙の気密性を確保するため、内側管板と
チューブを融合する方法を提供することを目的としたも
のである。An object of the present invention is to provide a method for fusing an inner tube sheet and tubes in order to ensure airtightness of the gap between the inner tube sheet and the tubes in a heat exchanger having a double tube sheet structure. .

〔発明の概要〕[Summary of the invention]

本発明は、エネルギー発生を外部で行い、光フフイバ−
管を介して融合点にエネルギーを集中できるレーサー溶
接を用い、内側管板とチューブを融合せしめるものであ
る。The present invention generates energy externally and uses optical fiber.
The inner tubesheet and tube are fused using racer welding, which allows energy to be focused through the tube to the fusion point.

〔発明の実施例〕[Embodiments of the invention]

第１図は、二重管板構造をもつ熱交換器のシェル側機器
の概略を示す。外側管板１と内側管板２の２枚の管板を
有し、チューブ３は外側管板ｌに管端溶接で溶着されて
いる。しかして、これらの外側管板１．内側管板２とチ
ューブ３０間隙は。FIG. 1 schematically shows the shell side equipment of a heat exchanger having a double tube plate structure. It has two tube sheets, an outer tube sheet 1 and an inner tube sheet 2, and the tube 3 is welded to the outer tube sheet 1 by tube end welding. Therefore, these outer tube sheets 1. What is the gap between the inner tube plate 2 and the tube 30?

−一耘α腓蓚七斗チューブ３内面より機械的に拡管して
密着させる方法が採られている。ところで、外側管板１
とチューブ３は管端溶↑とにより溶着されているため、
完全なる気密性が確保できるが、内側管板２とチューブ
３の間隙はチューブ拡管のみで密着状態を保っているの
で、前述の如く完全な気密性確保は不可能である。第２
図は。- A method is used to mechanically expand the tube from the inner surface of the tube 3 and bring it into close contact. By the way, outer tube plate 1
and tube 3 are welded by tube end welding ↑,
Although complete airtightness can be ensured, as the gap between the inner tube plate 2 and the tube 3 is kept in close contact only by tube expansion, it is impossible to ensure complete airtightness as described above. Second
The diagram is.

第１図のＡ部の拡大図を示す。An enlarged view of section A in FIG. 1 is shown.

本発明は上記の点を解決するため、第３１り！に示すよ
うにレーザー溶接を用い、内側管板２とチューブ３を融
合して気密性を確保するようにしだも内側管板２とチュ
ーブ３の融合を容易にし健全な溶接部１３を得るため、
図のようにチューブ３を内側管板２中央部で切断し、外
側管板１に取イ」けられる短管部４との二分割状とする
。そして、チューブ３、短管部４のセント完γ後、レー
サー溶作の溶接トーチ部をチューブ３内に挿入する。溶
接トーチ部は、先端に反射鏡５を有し、チューブ３内を
軸と平行に発射された入射レーザー光１１を直角に曲げ
、溶接部１３に照射する。また、溶接トーチ部は、光フ
アイバー管６、支持ローラ９３回転ギア７からなり、モ
ータ８により全体がチューブ３の軸心を中心に回転可能
な構造となっている。In order to solve the above-mentioned points, the present invention is the 31st feature! As shown in the figure, laser welding is used to fuse the inner tube sheet 2 and tube 3 to ensure airtightness.
As shown in the figure, the tube 3 is cut at the center of the inner tube sheet 2 to form a two-part shape with a short tube section 4 that is attached to the outer tube sheet 1. Then, after the tube 3 and the short tube portion 4 are finished, a welding torch portion for racer welding is inserted into the tube 3. The welding torch section has a reflecting mirror 5 at its tip, bends the incident laser beam 11 emitted parallel to the axis within the tube 3 at a right angle, and irradiates it onto the welding section 13 . Further, the welding torch section is composed of an optical fiber tube 6, a support roller 93, and a rotating gear 7, and has a structure in which the whole can be rotated around the axis of the tube 3 by a motor 8.

入射レーザー光１１はレーザー発振器１０から発射され
、光フアイバ管６を介して反射鏡５に到達し、溶接トー
チ部の回転により内側管板２とチューブ３とをレーザー
溶接で融合させる。さらに、融合状態を監視するためレ
ーザー発振器１０の発射管内にプリズム１５を十ノドし
、反射光１２をモニター１４にて状況把握を行う。The incident laser beam 11 is emitted from the laser oscillator 10, reaches the reflecting mirror 5 via the optical fiber tube 6, and fuses the inner tube plate 2 and the tube 3 by laser welding by rotating the welding torch section. Further, in order to monitor the fusion state, a prism 15 is placed inside the launch tube of the laser oscillator 10, and the reflected light 12 is monitored on a monitor 14 to grasp the situation.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、チューブ内面にレーザー光線を反射さ
せるだけの小形溶接トーチを挿入することにより内側管
板とチューブの融合が刈能になり、完全な４７ｔ￥１！
′ｔトを確保することができ、それにより、二重管板形
態交換器で問題であった内側管板とチューブとの間隙か
らの内部流体漏洩を完全Ｉこ防止１゛きる。According to the present invention, by inserting a small welding torch that only reflects the laser beam into the inner surface of the tube, the inner tube sheet and tube can be fused together, making it possible to achieve a perfect 47t yen!
This makes it possible to completely prevent internal fluid leakage from the gap between the inner tube sheet and the tube, which was a problem with double tube sheet type exchangers.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、二重管板構造の熱交換器シコール部分の概略
を示す断面図、第２図は、第１図のＡ部の拡大文、第３
１Ａは、本発明に用いるレーザー溶接装置の概略を示す
断面図である。 １・・外側管板、２・　内側管板、３・・・　チューブ
、４　・・短管部、５・・・反射鏡、６・・−光ファFig. 1 is a cross-sectional view schematically showing the section of a heat exchanger with a double tube plate structure, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig.
1A is a cross-sectional view schematically showing a laser welding device used in the present invention. 1...Outer tube sheet, 2. Inner tube sheet, 3...Tube, 4...Short tube section, 5...Reflector, 6...-Optical fiber

Claims (1)

【特許請求の範囲】[Claims] １　二重管板構造をもつ熱交換器において、チューブを
内側管板中央部で切断し、レーザー溶接用の溶接トーチ
をチューブ内に挿入し、該溶接トーチで上記チューブの
切断部をレーザー溶接にて融合するようにしたことを特
徴とする二重管板形態交換器の気密性確保方法。1 In a heat exchanger with a double tube plate structure, the tube is cut at the center of the inner tube plate, a welding torch for laser welding is inserted into the tube, and the cut part of the tube is laser welded with the welding torch. A method for ensuring airtightness of a double tube plate type exchanger, characterized in that the double tube plate type exchanger is fused together.
JP58166650A 1983-09-12 1983-09-12 How to ensure airtightness of double tube plate heat exchanger Pending JPS6060497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58166650A JPS6060497A (en) 1983-09-12 1983-09-12 How to ensure airtightness of double tube plate heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58166650A JPS6060497A (en) 1983-09-12 1983-09-12 How to ensure airtightness of double tube plate heat exchanger

Publications (1)

Publication Number Publication Date
JPS6060497A true JPS6060497A (en) 1985-04-08

Family

ID=15835197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58166650A Pending JPS6060497A (en) 1983-09-12 1983-09-12 How to ensure airtightness of double tube plate heat exchanger

Country Status (1)

Country Link
JP (1) JPS6060497A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002330A1 (en) * 1997-07-11 1999-01-21 Iwka Pacunion Gmbh Method and device for soldering the ends of tubular containers, specially tubes
WO2000053991A1 (en) * 1999-03-08 2000-09-14 Cesaroni Technologies Incorporated Laser bonding of heat exchanger tubes
EP1174247A1 (en) * 2000-07-17 2002-01-23 Bayerische Motoren Werke Aktiengesellschaft Device for inter-material joining of plastics parts by laser welding
FR3041280A1 (en) * 2015-09-23 2017-03-24 Saipem Sa METHOD OF ASSEMBLING TUBES BY LASER WELDING
CN109425255A (en) * 2017-08-24 2019-03-05 马勒国际有限公司 Heat exchanger and method for manufacturing heat exchanger

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002330A1 (en) * 1997-07-11 1999-01-21 Iwka Pacunion Gmbh Method and device for soldering the ends of tubular containers, specially tubes
US6417483B1 (en) 1997-07-11 2002-07-09 Iwka Pacunion Gmbh Method and device for soldering the ends of tubular containers, specially tubes
WO2000053991A1 (en) * 1999-03-08 2000-09-14 Cesaroni Technologies Incorporated Laser bonding of heat exchanger tubes
EP1174247A1 (en) * 2000-07-17 2002-01-23 Bayerische Motoren Werke Aktiengesellschaft Device for inter-material joining of plastics parts by laser welding
FR3041280A1 (en) * 2015-09-23 2017-03-24 Saipem Sa METHOD OF ASSEMBLING TUBES BY LASER WELDING
WO2017051118A1 (en) * 2015-09-23 2017-03-30 Saipem S.A. Method for assembling a tubular joining sleeve and a conduit lining tube by laser welding
US10562235B2 (en) 2015-09-23 2020-02-18 Saipem S.A. Method for assembling tubular joining sleeve and a conduit lining tube by laser welding
CN109425255A (en) * 2017-08-24 2019-03-05 马勒国际有限公司 Heat exchanger and method for manufacturing heat exchanger

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