JPS636396A - Repair method for multitube type fluororesin-made heat exchanger - Google Patents
Repair method for multitube type fluororesin-made heat exchangerInfo
- Publication number
- JPS636396A JPS636396A JP15021286A JP15021286A JPS636396A JP S636396 A JPS636396 A JP S636396A JP 15021286 A JP15021286 A JP 15021286A JP 15021286 A JP15021286 A JP 15021286A JP S636396 A JPS636396 A JP S636396A
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- tube
- damaged
- heat exchanger
- cut
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002844 melting Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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】
発明の技術分野
本発明は、多管式フッ素樹脂製交換器の補修方法に関し
、ざらに詳しくは多管式フッ素樹脂製熱交換器を構成す
るフッ素樹脂製熱交換器用チューブが一部破損した場合
の補修方法に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method for repairing a multi-tubular fluororesin heat exchanger, and more specifically, to a method for repairing a multi-tubular fluororesin heat exchanger. Concerning how to repair a tube if it is partially damaged.
発明の技術的背景ならびにその問題点
従来熱交換器としては、ステンレス鋼、ニッケル、銅な
どの金属製多管式熱交換器が広く用いられてきた。この
ような金属製熱交換器は大きな熱伝導率ならびに総括伝
熱係数を有しているが、酸液などに対する耐腐食性が充
分ではなく、また表面にスケールが付着しやすいという
問題点があった。Technical background of the invention and its problems Conventionally, multi-tubular heat exchangers made of metals such as stainless steel, nickel, and copper have been widely used as heat exchangers. Although such metal heat exchangers have high thermal conductivity and overall heat transfer coefficient, they have problems such as insufficient corrosion resistance against acid solutions and the tendency for scale to adhere to the surface. Ta.
このためフッ素樹脂製の多管式熱交換器が開発されてい
る。このフッ素樹脂製熱交換器は４０〜２５００本もの
多数のフッ素樹脂製チューブを束ねて両端を熱融着によ
りハニカム状に一体化した構造を有しており、優れた耐
熱性、耐薬品性を有するとともに、表面が滑らかである
ためスケールが付着しにくいという利点をも有している
。For this reason, multi-tubular heat exchangers made of fluororesin have been developed. This fluororesin heat exchanger has a structure in which 40 to 2,500 fluororesin tubes are bundled and integrated into a honeycomb shape by heat fusion at both ends, and has excellent heat resistance and chemical resistance. It also has the advantage that scale is difficult to adhere to because the surface is smooth.
ところがフッ素樹脂は、各種金属と比較して熱伝導率が
小さいため、熱交換器としての性能を上げるため、実用
上支障のない範囲でフッ素樹脂製チューブの肉厚をでき
る限り薄クシている。このようにフッ素樹脂製チューブ
は肉薄であり、しかもフッ素樹脂製チューブ内には、熱
交換時に過熱水蒸気が供給されることが多いため、過熱
水蒸気によってフッ素樹脂製チューブが振動し、互いに
隣接するチューブ同士がこすれ合うことがあり、このた
めフッ素樹脂製チューブの壁面が摩耗したり、おるいは
こすれ合った部分に静電気が発生するなどして、フッ素
樹脂製チューブにピンホールが発生することがおった。However, fluororesin has a lower thermal conductivity than various metals, so in order to improve its performance as a heat exchanger, the wall thickness of fluororesin tubes is made as thin as possible within a practical range. In this way, fluororesin tubes are thin, and since superheated steam is often supplied into the fluororesin tubes during heat exchange, the fluororesin tubes vibrate due to the superheated steam, causing adjacent tubes to The fluororesin tubes may rub against each other, which may cause the walls of the fluororesin tube to wear out, or static electricity may be generated in the areas where they rub against each other, causing pinholes to form in the fluororesin tube. Ta.
もしフッ素樹脂製チューブにピンホールが発生すると、
熱交換器としての機能が１０なわれるだけでなく、装置
に腐食流体が逆流するなどして大きな事故の原因となる
ことがあった。If a pinhole occurs in the fluororesin tube,
Not only would the function as a heat exchanger be compromised, but corrosive fluid could flow back into the device, causing a major accident.
このため、もしフッ素樹脂製熱交換器を構成するフッ素
樹脂製チューブにピンホールなどの破損が生じた場合に
は、この破損を補修する必要があった。Therefore, if damage such as a pinhole occurs in the fluororesin tube constituting the fluororesin heat exchanger, it is necessary to repair the damage.
従来、破損が生じたフッ素樹脂製チューブの補修は、以
下のようにして行なわれてきた。すなわち、もしフッ素
樹脂製チューブに破１Ωが生じたような場合には、チュ
ーブ集束端部にお′いて破損が生じたチューブの開口端
を閉塞することによりチューブ全体を閉塞していた。破
損が生じたチューブの開口端をチューブ集束端部で閉塞
するには、−般に、その開口端部内に熱溶融性フッ素樹
脂製の溶接棒を挿入し、熱風ガンから発生する熱風など
を開口端部に吹付けて加熱することによって熱溶融性フ
ッ素樹脂を溶融ざぜ、破損が生じたチューブの開口端部
壁と熱溶融性フッ素樹脂溶接棒とを互′いに融着させて
一体化することにより行なわれてきた。Conventionally, damaged fluororesin tubes have been repaired in the following manner. That is, if a 1Ω break occurs in a fluororesin tube, the entire tube is closed by closing the open end of the tube where the breakage occurred at the tube convergence end. To close the open end of a damaged tube with the tube converging end, generally, a welding rod made of heat-melting fluororesin is inserted into the open end to block hot air generated from a hot air gun into the open end. By spraying it on the end and heating it, the hot-melt fluororesin is melted and the open end wall of the damaged tube and the hot-melt fluororesin welding rod are fused together and integrated. It has been done by.
ところが上記のようにして破損が生じたフッ素樹脂製チ
ューブの開口端部を閉塞しようすると、破損が生じたフ
ッ素樹脂製チューブの開口端部は閉塞しうるが、この閉
塞時にチューブ集束端部がかなりの高温にざらされるた
め、破損が生じたフッ素樹脂製チューブに隣接するフッ
素樹脂製チューブもかなりの高温にざらされて熱変形が
生じ、・破損が生じたフッ素樹脂製チューブと隣接する
チューブとの間に剥離が生じてしまうという重大な問題
点が生じていた。このような問題点は、チューブがポリ
テトラフルオロエチレン製である場合に特に重大でおっ
た。−方、フッ素樹脂製チューブがテトラフルオロエチ
レンとパーフルオロアルキルビニルエーテルとの共重合
体（以下ＰＦＡと略記することがおる）などの熱溶融性
フッ素樹脂の場合には、上記のような問題点に加えて、
加熱の変形によって互いに隣接するフッ素樹脂製チュー
ブ同士が融着してしまうという問題点も生じていた。However, when attempting to close the open end of the damaged fluororesin tube as described above, the open end of the damaged fluororesin tube may be closed, but at the time of this closure, the converging end of the tube is considerably damaged. As the fluororesin tubes adjacent to the damaged fluororesin tube are exposed to high temperatures, the fluororesin tubes adjacent to the damaged fluororesin tube are also exposed to considerable high temperatures and undergo thermal deformation. A serious problem occurred in that peeling occurred between the two. These problems were particularly serious when the tube was made of polytetrafluoroethylene. - On the other hand, if the fluororesin tube is made of a heat-melting fluororesin such as a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (hereinafter sometimes abbreviated as PFA), the above problems may occur. In addition,
Another problem has arisen in that adjacent fluororesin tubes are fused together due to deformation caused by heating.
もし隣接するフッ素樹脂製チューブ間に剥離が生ずると
、熱交換流体が剥離によって生じたチューブ間の間隙部
をつたわって外部に漏洩してしまうという熱交換器とし
ては致命的な欠陥となってしまう。If separation occurs between adjacent fluororesin tubes, the heat exchange fluid will leak to the outside through the gap between the tubes, which is a fatal defect for the heat exchanger. .
また、全く別の補修方法としては、ピンホールなどの破
損が生じたフッ素樹脂製チューブを、その破損部の両端
を切断し、それぞれの切断端部を加熱しながら圧着する
ことにより融着して閉塞する方法も採用されてきた。と
ころがこの方法では、第３図に示すように、切断面の両
端に非融着部Ａが生じやすく、流体漏れが発生しやすく
、信頼性に劣るという大きな問題点があった。In addition, a completely different repair method is to cut off both ends of a fluororesin tube with damage such as pinholes, and fuse the cut ends together by crimping them while heating. A method of occlusion has also been adopted. However, as shown in FIG. 3, this method has a major problem in that unfused portions A are likely to occur at both ends of the cut surface, fluid leakage is likely to occur, and reliability is poor.
発明の目的
本発明は、上記のような従来技術に伴なう問題点を一挙
に解決しようとするもので必って、もし熱交換器を形成
するフッ素樹脂製チューブにピンホールなどの破損が生
じても、この破損を隣接するチューブに悪影響を与える
ことなくしかも簡単に補修しうるような、多管式フッ素
樹脂製熱交換器の補修方法を提供することを目的として
いる。Purpose of the Invention The present invention aims to solve all of the problems associated with the prior art as described above. It is an object of the present invention to provide a method for repairing a multi-tube type fluororesin heat exchanger, in which even if damage occurs, the damage can be easily repaired without adversely affecting adjacent tubes.
発明の概要
本発明に係る多管式のフッ素樹脂製熱交換器の補修方法
は、破ｊΩが生じたフッ素樹脂製チューブの破損部を切
断して除去した後、切断開口部にこのチューブの外周に
沿うような外枠リングを挿入し、次いで切断開口部を加
熱により溶融された熱溶融性フッ素樹脂で閉塞すること
を特徴としている。Summary of the Invention The method for repairing a multi-tubular fluororesin heat exchanger according to the present invention is to cut and remove the damaged portion of a fluororesin tube in which a fracture has occurred, and then insert the outer periphery of the tube into the cut opening. This method is characterized by inserting an outer frame ring along the following lines, and then closing the cut opening with a heat-melting fluororesin melted by heating.
本発明に係る多管式フッ素樹脂製熱交換器の補修方法に
よれば、破損が生じたフッ素樹脂製チューブの破１０部
を切断して除去した後、切断開口部にこのチューブの外
周に沿うような外枠リングを挿入し、次いで切断開口部
を加熱により溶融された熱溶融性フッ素樹脂で閉塞して
いるので、破損が生じたチューブの開口部閉塞時に、加
熱によってチューブが変形することが防止され、しかも
破損が生じて補修されるべきチューブの内周面に熱溶融
性フッ素樹脂を強固に一体化することができ、信頼性の
ある補修方法が提供される。According to the method for repairing a multi-tubular fluororesin heat exchanger according to the present invention, after cutting and removing 10 broken parts of the damaged fluororesin tube, An outer frame ring like this is inserted, and the cut opening is then closed with heat-melting fluororesin, which prevents the tube from deforming due to heating when the opening of the damaged tube is closed. A reliable repair method is provided in which the heat-melting fluororesin can be firmly integrated into the inner circumferential surface of a tube that is prevented and is to be repaired after damage occurs.
発明の詳細な説明
以下本発明に係る多管式フッ素樹脂製熱交換器の補修方
法について、図面を参照しながら説明する。DETAILED DESCRIPTION OF THE INVENTION A method for repairing a multi-tubular fluororesin heat exchanger according to the present invention will be described below with reference to the drawings.
本発明では、破損が生じた多管式フッ素樹脂製熱交換器
が補晦されるが、この多管式フッ素樹脂製熱交換器は、
４０〜２５００本にも及ぶ多数のフッ素樹脂製チューブ
からなり、このチューブの集束端部は一体化されて一般
にハニカム状とされている。In the present invention, a damaged multi-tubular fluororesin heat exchanger is repaired, but this multi-tubular fluororesin heat exchanger is
It consists of a large number of fluororesin tubes ranging from 40 to 2,500, and the converging ends of these tubes are generally integrated into a honeycomb shape.
・このようなチューブを構成するフッ素樹脂としては、
熱溶融性であってもよく、また熱溶融性でなくてもよく
、熱溶融性でないフッ素樹脂とじてはポリテトラフルオ
ロエチレン（ＰＴＦＥ）が用いられ、また熱溶融性フッ
素樹脂であるフッ素樹脂としては、前述のＰＦＡ、テト
ラフルオロエチレンとへキサフルオロプロピレンとの共
重合体であるＦＥＰ、テトラフルオロエチレンとへキサ
フルオロプロピレンとパーフルオロアルキルビニルエー
テルとの共重合体で必るＥＰＥ、ポリクロロトリフルオ
ロエチレンで必るＰＣＴＦＥ、エチレンとテトラフルオ
ロエチレンとの共重合体であるＥＴＦＥなどが用いられ
る。・The fluororesin that makes up such a tube is
Polytetrafluoroethylene (PTFE) is used as a non-heat-melting fluororesin, and may or may not be a heat-melting fluororesin. The above-mentioned PFA, FEP which is a copolymer of tetrafluoroethylene and hexafluoropropylene, EPE which is a copolymer of tetrafluoroethylene, hexafluoropropylene and perfluoroalkyl vinyl ether, and polychlorotrifluoro PCTFE, which is made of ethylene, and ETFE, which is a copolymer of ethylene and tetrafluoroethylene, are used.
ところで上記のような多管式フッ素樹脂製熱交換器を構
成するフッ素樹脂製チューブの一本に破損が生じた場合
の補修方法についてシ（明する。まず第１図に示すよう
に、ピンホールなどの破損部１が生じたフッ素樹脂製チ
ューブ２の破損部１の両端を切断して、破損部１を除去
する。By the way, I will explain how to repair one of the fluororesin tubes that makes up the multi-tube fluororesin heat exchanger as described above. Both ends of the damaged part 1 of the fluororesin tube 2 in which the damaged part 1 has occurred are cut off, and the damaged part 1 is removed.
次いでこのようにして切断された切断開口部に、このチ
ューブの外周の沿うような形状の外枠リング３を挿入す
る。この外枠リング３は、加熱時においてもチューブを
構成するフッ素樹脂と融着ぜず、しかも耐熱性に富んだ
材質により形成されていることが好ましく、具体的には
、金属製あるいはセラミックス製のものが用いられるこ
とが好ましい。Next, an outer frame ring 3 shaped to follow the outer circumference of the tube is inserted into the cut opening thus cut. The outer frame ring 3 is preferably made of a material that does not fuse with the fluororesin constituting the tube even when heated and is highly heat resistant. Specifically, it is made of a material made of metal or ceramics. It is preferable that a
このようにして破損が生じたフッ素樹脂製チューブ２の
破損部１を除去した後、このチューブ２の切断開口部に
外枠リング３を挿入した状態で、切断開口部を、加熱に
より溶融された熱溶融性フッ素樹脂で閉塞する。After removing the damaged part 1 of the fluororesin tube 2 which has been damaged in this way, with the outer frame ring 3 inserted into the cut opening of the tube 2, the cut opening is heated and melted. Block with heat-melting fluororesin.
破損が生じたフッ素樹脂製チューブ２の切断開口部を加
熱により溶融された熱溶融性フッ素樹脂で閉塞するには
、具体的には、破損が生じたフッ素樹脂製デユープ２の
＃ＪＪ断開口開口部熱溶融性フッ素樹脂製の溶接棒４を
挿入し、次いでこの状態で破損が生じたフッ素樹脂製チ
ューブ１の切断開口部に熱風ガンからの熱風を吹付けて
熱溶融性フッ素樹脂製溶接棒４を溶融させ、この溶接棒
４の外周面と破損が生じたフッ素樹脂製チューブ１の内
周面とを一体化させればよい。あるいはまた、破損が生
じたフッ素樹脂製チューブ１の切断開口部に、この開口
部を加熱しながら、加熱溶融された熱溶融性フッ素樹脂
を流し込むことによって、破損が生じたフッ素樹脂製チ
ューブ２の切断開口部を閉塞してもよい。In order to close the cut opening of the damaged fluororesin tube 2 with heat-melting fluororesin melted by heating, specifically, the #JJ cut opening of the damaged fluororesin duplex 2 is closed. A welding rod 4 made of partially heat-fusible fluororesin is inserted, and then hot air from a hot air gun is blown into the cut opening of the damaged fluororesin tube 1 to remove the welding rod 4 made of heat-fusible fluororesin. 4 may be melted and the outer peripheral surface of this welding rod 4 and the inner peripheral surface of the damaged fluororesin tube 1 may be integrated. Alternatively, the damaged fluororesin tube 2 can be cut by pouring heated and melted heat-melting fluororesin into the cut opening of the fluororesin tube 1 that has suffered damage while heating this opening. The cutting opening may be occluded.
破損が生じたフッ素樹脂製チューブ２の切断開口部を閉
塞するに際して、切断開口部の外周には外枠リングが嵌
挿されているので、加熱時にチューブ２の壁面が熱膨張
により外方に拡開しようとしても、外枠リングによって
その拡開は阻止され、したがって切断開口部周辺でのチ
ューブ２の内周面と熱溶融性フッ素、樹脂４の外周面と
は圧着されて強固に一体化される。When closing the cut opening of the damaged fluororesin tube 2, an outer frame ring is fitted around the outer periphery of the cut opening, so that the wall surface of the tube 2 expands outward due to thermal expansion during heating. Even if an attempt is made to open the tube, the expansion is prevented by the outer frame ring, and therefore, the inner circumferential surface of the tube 2 and the outer circumferential surface of the thermofusible fluorine resin and resin 4 around the cutting opening are crimped and firmly integrated. Ru.
上記のようにして破損が生じたチューブ２を閉塞した後
、チューブ２から外枠リングを除去すれば、多管式フッ
素樹脂製交換器の補修が終了する。After closing the damaged tube 2 as described above, removing the outer frame ring from the tube 2 completes the repair of the multi-tube fluororesin exchanger.
発明の効果
本発明に係る多管式フッ素、樹脂製熱交換器の補修方法
によれば、破損が生じたフッ素樹脂製チューブの破損部
を切断して除去した後、切断開口部にこのチューブの外
周に沿うような外枠リングを挿入し、次いで切断開口部
を加熱により溶融された熱溶融ｉ生フッ素樹脂で閉塞し
ているので、破損が生じたチューブの開口部閉塞時に、
加熱によってチューブが変形することが防止され、しか
も、加熱時にチューブの壁面が熱膨張により外方に拡開
するが外枠リングによってその拡開は阻止され、したが
って切断開口部周辺でのチューブ内周面と熱溶融性フッ
素樹脂の外周面とは、圧着されて強固に一体化すること
ができ、信頼性のある補修方法が提供される。Effects of the Invention According to the method for repairing a multi-tubular fluorine resin heat exchanger according to the present invention, after cutting and removing the damaged part of the fluororesin tube, the tube is inserted into the cut opening. An outer frame ring is inserted along the outer periphery, and then the cut opening is closed with heat-melted raw fluororesin, so when the opening of a damaged tube is closed,
This prevents the tube from being deformed by heating, and furthermore, when heated, the tube wall expands outward due to thermal expansion, but this expansion is prevented by the outer frame ring, thus reducing the inner circumference of the tube around the cutting opening. The surface and the outer circumferential surface of the heat-fusible fluororesin can be firmly integrated by being crimped, providing a reliable repair method.
第１図および第２図は、本発明に係る多管式フッ素樹脂
製熱交換器の補修方法の説明図であり、第３図は従来方
法の説明図である。
１・・・破損部
２・・・破損が生じたチューブ
３・・・外枠リング
４・・・熱溶融性フッ素樹脂製溶接捧
代理人 弁理士 銘木 俊−部
第 １ 図
第 ２ 図
第 ３ 図1 and 2 are explanatory diagrams of a method for repairing a multi-tubular fluororesin heat exchanger according to the present invention, and FIG. 3 is an explanatory diagram of a conventional method. 1... Damaged part 2... Tube where damage occurred 3... Outer frame ring 4... Heat-melting fluororesin welding agent Patent attorney Toshibeki Meiki No. 1 Figure 2 Figure 3 figure
Claims (1)
断して除去した後、切断開口部にこのチューブの外周に
沿うような外枠リングを挿入し、次いで切断開口部を加
熱により溶融された熱溶融性フッ素樹脂で閉塞すること
を特徴とする多管式フッ素樹脂製熱交換器の補修方法。(1) After cutting and removing the damaged part of the fluororesin tube, insert an outer frame ring along the outer circumference of the tube into the cut opening, and then heat the cut opening to melt it. A method for repairing a multi-tubular fluororesin heat exchanger, characterized in that the heat exchanger is closed with a heat-melting fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021286A JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021286A JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS636396A true JPS636396A (en) | 1988-01-12 |
| JPH0440638B2 JPH0440638B2 (en) | 1992-07-03 |
Family
ID=15491981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15021286A Granted JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS636396A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5104609A (en) * | 1988-11-16 | 1992-04-14 | Mitsubishi Nuclear Fuel Co. | Assembly method for nuclear fuel assembly |
| US5188798A (en) * | 1988-11-16 | 1993-02-23 | Mitsubishi Nuclear Fuel Co. | Grid for nuclear fuel assembly |
-
1986
- 1986-06-26 JP JP15021286A patent/JPS636396A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5104609A (en) * | 1988-11-16 | 1992-04-14 | Mitsubishi Nuclear Fuel Co. | Assembly method for nuclear fuel assembly |
| US5188798A (en) * | 1988-11-16 | 1993-02-23 | Mitsubishi Nuclear Fuel Co. | Grid for nuclear fuel assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440638B2 (en) | 1992-07-03 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |