JPS6333604B2 - - Google Patents
Info
- Publication number
- JPS6333604B2 JPS6333604B2 JP21704382A JP21704382A JPS6333604B2 JP S6333604 B2 JPS6333604 B2 JP S6333604B2 JP 21704382 A JP21704382 A JP 21704382A JP 21704382 A JP21704382 A JP 21704382A JP S6333604 B2 JPS6333604 B2 JP S6333604B2
- Authority
- JP
- Japan
- Prior art keywords
- hanging
- heat exchanger
- exchanger tube
- tube group
- tubes
- 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
- 239000000725 suspension Substances 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【発明の詳細な説明】
本発明は、例えばボイラにおいて、鉛直方向に
配置された複数の吊下管に支持されている水平方
向に配置された複数の伝熱管群を取替えるための
方法に係り、下方の伝熱管群を支持したまま上方
の伝熱管群を吊下管の一部とともに取替えるよう
にした方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for replacing a plurality of horizontally arranged heat exchanger tube groups supported by a plurality of vertically arranged hanging tubes, for example in a boiler, The present invention relates to a method in which an upper heat exchanger tube group is replaced together with a part of the hanging tubes while supporting the lower heat exchanger tube group.
第１図は、高温ガスとの熱交換を行なうボイラ
の一例を示した概略図である。１はボイラ本体で
あり、鉛直方向に一組の吊下管２が本体１に支点
３で支えられて配置されている。そして、第１図
のＡ−Ａ線に沿う断面を示した第２図から明らか
なように、第１図の奥行き方向に複数組の吊下管
２が設けられ、これに複数の水平方向に配置され
た管から成る伝熱面エレメントが支持されて伝熱
管群４ａ，４ｂ，４ｃを形成している。この伝熱
管群４ａ，４ｂ，４ｃは、矢印５で示す高温ガス
の流れ方向に沿つて配置されている。 FIG. 1 is a schematic diagram showing an example of a boiler that exchanges heat with high-temperature gas. 1 is a boiler main body, and a set of hanging pipes 2 are vertically disposed on the main body 1 and supported by a fulcrum 3. As is clear from FIG. 2, which shows a cross section along line A-A in FIG. 1, a plurality of sets of hanging pipes 2 are provided in the depth direction of FIG. Heat transfer surface elements consisting of arranged tubes are supported to form heat transfer tube groups 4a, 4b, 4c. The heat exchanger tube groups 4a, 4b, and 4c are arranged along the flow direction of high-temperature gas indicated by arrow 5.
ところで、伝熱管群４ａ，４ｂ，４ｃを形成す
る伝熱面エレメントは、必要に応じて新しいもの
と交換されるが、この交換作業は従来次のような
方法で実施されていた。 Incidentally, the heat transfer surface elements forming the heat transfer tube groups 4a, 4b, 4c are replaced with new ones as necessary, and this replacement work has conventionally been carried out in the following manner.
すなわち、第１図に於て、例えば上部の伝熱管
群４ａの伝熱面エレメントを取替えるものとする
と、図中Ｘ及びＹの位置でエレメントを切断する
ことになるが、このとき、下部の伝熱管群４ｂ，
４ｃのエレメントを何等かの方法で支持しておく
必要がある。また、取替える伝熱面エレメント
は、ボイラ本体１の前壁管または後壁管を切断し
て開口部６を設け、ここから伝熱面エレメントを
出し入れする。しかし、第３図に示すように、取
替えようとする伝熱面エレメント部分の近傍に、
柱や連絡管等の動かし難い障害物７があるとき
は、その部分に開口を形成してもエレメントを出
し入れすることができないので、障害物のないゾ
ーンに開口を形成し、この位置へエレメントを横
引きしたうえで開口から引き出し、かつ新製エレ
メントをその開口から挿入して所定位置へ横引き
する必要がある。そのため数組の吊下管２を連続
して切断しなければならなかつた。 That is, in FIG. 1, for example, if the heat transfer surface element of the upper heat transfer tube group 4a is replaced, the element will be cut at the positions X and Y in the figure, but at this time, the lower heat transfer surface element will be replaced. heat tube group 4b,
It is necessary to support element 4c in some way. Moreover, for the heat transfer surface element to be replaced, an opening 6 is provided by cutting the front wall tube or the rear wall tube of the boiler main body 1, and the heat transfer surface element is taken in and out from there. However, as shown in Figure 3, near the heat transfer surface element to be replaced,
If there is an obstacle 7 that is difficult to move, such as a pillar or a connecting pipe, the element cannot be taken in or taken out even if an opening is formed in that part. Therefore, an opening is formed in a zone where there are no obstacles, and the element is placed in this position. It is necessary to pull it horizontally, then pull it out from the opening, insert a new element through the opening, and then pull it horizontally into a predetermined position. Therefore, several sets of hanging pipes 2 had to be cut in succession.
そのため従来は、ワイヤーやチエンブロツクに
よつて切断する吊下管の下部エレメントを仮吊り
して、この仮吊りの状態でエレメントの取外し、
新製エレメントの取込み、切断部の溶接、仮吊り
部分の取外し等を行なつていた。 Therefore, in the past, the lower element of the hanging pipe to be cut was temporarily suspended using a wire or chain block, and the element was removed while it was temporarily suspended.
They were installing new elements, welding cut parts, and removing temporary hanging parts.
しかしながら、このような従来の取替方法は、
作業の能率が悪く、かつ安全性にも問題があつ
た。 However, such conventional replacement methods
The work was inefficient and there were safety issues.
本発明は、上記の従来の問題点を解決すること
を目的としてなされたもので、ある範囲の吊下管
の荷重を、吊梁及び吊棒によつて取替範囲の上部
側の吊下管に分散させるようにすることを特徴と
している。 The present invention was made with the aim of solving the above-mentioned conventional problems. It is characterized by the fact that it is dispersed into
以下本発明の一実施例について第４図ないし第
１１図を参照して詳細に説明する。 An embodiment of the present invention will be described in detail below with reference to FIGS. 4 to 11.
第４図は本発明における、切断した吊下管の支
持荷重を吊梁によつて吊棒に分割する状態を示し
たものである。すなわち、吊下管２ａ〜２ｄを切
断するものとすると、この吊下管２ａ〜２ｄの切
断部の上下を、水平方向に延設した一対の吊梁１
１，１２で夫々管の両側をはさんでねじ等で固定
し、かつ夫々の吊下管２ａ〜２ｄに取り付けてあ
るスリーブ１３ａ，１３ｂで吊梁１１，１２を上
下にはさみ込むようにしてある。 FIG. 4 shows a state in which the support load of a cut hanging pipe is divided into hanging rods by a hanging beam in the present invention. That is, when the hanging pipes 2a to 2d are cut, a pair of hanging beams 1 extending horizontally above and below the cut portion of the hanging pipes 2a to 2d are cut.
1 and 12 sandwich the tubes on both sides and fix them with screws or the like, and the suspension beams 11 and 12 are sandwiched between the upper and lower sides by sleeves 13a and 13b attached to the respective suspension tubes 2a to 2d.
更に、吊梁１１，１２を吊棒１４，１５で連結
する。また、吊下管２ａと２ｂ、２ｃと２ｄを
夫々吊梁１２の上部で吊梁１６，１７によつて保
持し、吊梁１２と１６，１２と１７を吊棒１８，
１９で連結する。 Furthermore, the hanging beams 11 and 12 are connected by hanging rods 14 and 15. In addition, the hanging pipes 2a and 2b, 2c and 2d are held at the upper part of the hanging beam 12 by hanging beams 16 and 17, respectively, and the hanging beams 12 and 16, 12 and 17 are held by hanging rods 18 and 17, respectively.
Connect at 19.
このようにすると、下方の吊下管２ａ〜２ｄの
支持荷重4Wは、吊梁１１によつて吊棒１４，１
５に2Wづつに分割される。更に、吊棒１４，１
５の荷重は吊梁１２によつて吊棒１８，１９に伝
えられ、これは吊梁１６，１７を介して上方の吊
下管２ａ〜２ｄに分散される。このようにすれ
ば、新製エレメント４′を横引きするのに必要な
空間Ｓを作るために、複数本の吊下管を切断して
も、その荷重を分散させて最終的に吊下管１本当
りにかかる荷重Ｗはかわらず、強度は十分保たれ
る。 In this way, the support load 4W of the lower hanging pipes 2a to 2d is carried by the hanging beam 11 to the hanging rods 14 and 1.
It is divided into 5 parts of 2W each. Furthermore, the hanging rod 14,1
The load of 5 is transmitted to the hanging rods 18 and 19 by the hanging beam 12, and is distributed to the upper hanging pipes 2a to 2d via the hanging beams 16 and 17. In this way, even if multiple suspension pipes are cut in order to create the space S necessary for horizontally pulling the newly manufactured element 4', the load can be distributed and the final suspension pipe The load W applied to each piece does not change, and the strength is maintained sufficiently.
次に本発明を採用した具体例について説明す
る。採用したボイラは、第５図のような構造とな
つている。 Next, a specific example employing the present invention will be described. The adopted boiler has a structure as shown in Figure 5.
すなわち、伝熱管群２１ａ，２１ｂ，２１ｃが
吊下管２２ａ，２２ｂによつて、伝熱管群２１
ｄ，２１ｅが吊下管２３ａ，２３ｂによつてそれ
ぞれ支持されている。吊下管は天井管２４を貫通
して吊金物２５及び吊棒２６を介して図示しない
鉄骨に荷重を伝えている。このボイラ２０の伝熱
管群２１ａの取替えを行つた。伝熱管群２１ａを
形成する各伝熱面エレメントの管２７は第６図に
示す様な金物２８を介して吊下管２２ａ，２２ｂ
に荷重を伝える構造になつている為、第７図に示
す様に２枚の伝熱面エレメント２１a′，２１a″と
２本の吊下管２２ａ，２２ｂを一組として製作し
ている。従つてこの１組のエレメント２１a′，２
１a″を第５図に示す後壁管２９を切断した開口部
３０（後述する第８図及び第９図参照）より挿入
し、○・の位置にて溶接を行なつた。これをEEの
断面にて見ると第８図の様になる。第８図に示す
様に後壁管２９近傍には大口径連絡管３１及び柱
３２があるため第８図に示すのゾーンは第９図
に示した様にのゾーンの適当な個所よりエレメ
ント２１を挿入し、横引きして正規の位置にセツ
トする必要がある。このためその途中にある吊下
管２２ａ，２２ｂのうち何本かを切断しなければ
ならない。これらの切断した吊下管の荷重を支持
するのに吊梁を用いるがその様子が第１０図、第
１１図に示されている。本例では吊下管が２本並
列しているので補助梁を使用しているのが相異す
るのみで原理的には第４図と全く同じである。 That is, the heat exchanger tube groups 21a, 21b, 21c are connected to the heat exchanger tube group 21 by the hanging tubes 22a, 22b.
d and 21e are supported by hanging pipes 23a and 23b, respectively. The hanging pipe passes through the ceiling pipe 24 and transmits the load to a steel frame (not shown) via a hanging hardware 25 and a hanging rod 26. The heat exchanger tube group 21a of this boiler 20 was replaced. The tubes 27 of each heat transfer surface element forming the heat transfer tube group 21a are connected to hanging tubes 22a, 22b via metal fittings 28 as shown in FIG.
Since the structure is such that the load is transmitted to the surface, two heat transfer surface elements 21a', 21a'' and two hanging pipes 22a, 22b are manufactured as a set, as shown in Fig. 7. A pair of lever elements 21a', 2
1a'' was inserted through the opening 30 (see FIGS. 8 and 9 described later) where the rear wall tube 29 shown in FIG. When viewed in cross section, it looks like Fig. 8.As shown in Fig. 8, there is a large-diameter connecting pipe 31 and a pillar 32 near the rear wall pipe 29, so the zone shown in Fig. 8 is as shown in Fig. 9. It is necessary to insert the element 21 from an appropriate point in the zone as shown and pull it horizontally to set it in the proper position.For this purpose, some of the hanging pipes 22a and 22b in the middle must be cut. A hanging beam is used to support the load of these cut hanging pipes, as shown in Figures 10 and 11. In this example, two hanging pipes are connected in parallel. Therefore, the principle is exactly the same as in Fig. 4, with the only difference being that auxiliary beams are used.
先ず吊下管２２a1〜２２a6の荷重は吊下管２２
a1〜２２a6に取り付けたスリーブ３５によつて補
助梁３６に伝えられ、吊梁３７〜４０及び吊棒４
１〜４４によつて、上部側の補助梁４５に伝えら
れる。補助梁４５は吊下管に取り付けたスリーブ
３５を介して吊下管に、荷重を戻す。本例では吊
下管の許容荷重が1.5倍まで取れた為、12本の吊
下管の荷重を８本の吊下管で支持する構造とし
た。 First, the load on the hanging pipes 22a 1 to 22a 6 is
It is transmitted to the auxiliary beam 36 by the sleeve 35 attached to a 1 to 22a 6 , and the suspension beams 37 to 40 and the hanging rod 4
1 to 44, the signal is transmitted to the auxiliary beam 45 on the upper side. The auxiliary beam 45 returns the load to the suspension tube via the sleeve 35 attached to the suspension tube. In this example, the allowable load of the hanging pipes was increased to 1.5 times, so the structure was designed so that the load of 12 hanging pipes was supported by 8 hanging pipes.
このように吊下管２２a1〜２２a6に吊梁３７〜
４０等を取付け、更に吊梁３７〜４０を吊棒４１
〜４４で連結したうえで、Ｃゾーン近くの吊下管
２２a6から切断してそのエレメントを図示しない
後壁管の開口部から取り外し、Ｄゾーンのエレメ
ントは横引きしたうえでＣゾーンの上記開口部か
ら取り外す。一方、新製エレメントを取付ける際
は、上記とは逆に、Ｃゾーンの開口部から新製エ
レメント４６を挿入し、横引きしてＤゾーンの所
定位置へ移動させて取付けるものである。 In this way, the suspension beams 37 to 22a 1 to 22a 6 are connected to the suspension pipes 22a 1 to 22a 6.
40, etc., and then attach the hanging beams 37 to 40 to the hanging rod 41.
~ 44, then cut it from the suspension pipe 22a6 near the C zone and remove the element from the opening of the rear wall pipe (not shown). Remove it from the section. On the other hand, when installing a new element, contrary to the above, the new element 46 is inserted through the opening in the C zone, pulled horizontally, and moved to a predetermined position in the D zone for installation.
以上詳述したように、本発明によれば、上方の
伝熱管群を吊下管の一部とともに取替えるに際し
ては、上方の伝熱管群の上下部に夫々水平方向に
延設された吊梁を吊下管に係合させ、上下部の吊
梁どうしを吊棒を介して連結したのち、上方の伝
熱管群が固着された吊下管部分を切除して上方の
伝熱管群とともに外部へ取外し、新しい吊下管に
固着された伝熱管群を搬入し、前記切除部におい
て吊下管どうしを接合するようにするので、下方
の吊下管の支持荷重は吊梁によつて吊棒に分割さ
れ、更に吊棒の荷重は吊梁によつて上方の吊下管
に分散されることになる。 As described in detail above, according to the present invention, when replacing the upper heat exchanger tube group together with a part of the suspension tubes, suspension beams extending horizontally are installed at the upper and lower parts of the upper heat exchanger tube group, respectively. After engaging the suspension pipe and connecting the upper and lower suspension beams via the hanging rod, cut out the suspension tube part to which the upper heat exchanger tube group is fixed and remove it together with the upper heat exchanger tube group to the outside. , the group of heat exchanger tubes fixed to the new hanging tubes is brought in, and the hanging tubes are joined at the cut out part, so the supporting load of the lower hanging tubes is divided into hanging rods by the hanging beams. Furthermore, the load of the hanging rod is distributed to the upper hanging pipe by the hanging beam.
すなわち、本発明による伝熱管群の取替方法に
よれば、ある範囲の吊下管の荷重を吊梁及び吊棒
によつて取替範囲の上部側の吊下管に分散させる
ようにすることを特徴としているので、新製エレ
メントを横引きするのに必要な空間を作るため
に、複数本の吊下管を切断しても、その荷重を分
散させて最終的に吊下管１本当りにかかる荷重Ｗ
はかわらず、強度は十分保たれるので、従来のよ
うに、ワイヤーやチエンブロツクによつて切断す
る吊下管の下部エレメントを仮吊り状態でエレメ
ントの取外し、新製エレメントの取込みを行うこ
となく、下方の伝熱管群を支持したまま能率良く
安全かつ確実に上方の伝熱管群を吊下管の一部と
ともに取替えることができる。 That is, according to the method for replacing a group of heat transfer tubes according to the present invention, the load of the hanging tubes in a certain range is distributed to the hanging tubes on the upper side of the replacement range by the hanging beams and hanging rods. Even if multiple hanging pipes are cut to create the space necessary for horizontally pulling the new element, the load will be distributed and the final load will be reduced per hanging pipe. Load W applied to
However, the strength is maintained sufficiently, so there is no need to temporarily remove the lower element of the hanging pipe that is cut using wire or chain blocks and install a new element, as in the case of conventional methods. , the upper heat exchanger tube group can be efficiently, safely and reliably replaced together with a portion of the hanging tubes while supporting the lower heat exchanger tube group.
第１図は伝熱管群を有するボイラの一例を示す
概略図、第２図は第１図のＡ−Ａ線に沿う断面
図、第３図は第１図のＢ−Ｂ線に沿う断面図、第
４図は本発明を実施する際の吊梁の使用状態を示
し、ａは正面図、ｂは側面図、第５図は本発明を
採用した具体的ボイラの一例を示した図、第６図
及び第７図は第５図のボイラにおける吊下管と伝
熱面エレメントの取付状況を説明する斜視図、第
８図は第５図のＥ−Ｅ線に沿う断面図、第９図は
本発明における伝熱面エレメントの横引きを説明
するために示した第８図を拡大した概略図、第１
０図は第５図のＧ−Ｇ線に沿う断面図、第１１図
は第１０図の側面図である。
１……ボイラ本体、２ａ〜２ｄ……吊下管、１
１，１２，１６，１７……吊梁、１３ａ，１３ｂ
……スリーブ、１４，１５，１８，１９……吊
棒。
Fig. 1 is a schematic diagram showing an example of a boiler having a group of heat exchanger tubes, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along line B-B in Fig. 1. , FIG. 4 shows the state in which the suspension beam is used when carrying out the present invention, where a is a front view, b is a side view, and FIG. 5 is a diagram showing an example of a specific boiler adopting the present invention. Figures 6 and 7 are perspective views illustrating how the suspension pipe and heat transfer surface element are installed in the boiler shown in Figure 5, Figure 8 is a sectional view taken along line E-E in Figure 5, and Figure 9. 1 is an enlarged schematic diagram of FIG. 8 shown to explain horizontal drawing of the heat transfer surface element in the present invention;
0 is a sectional view taken along line GG in FIG. 5, and FIG. 11 is a side view of FIG. 10. 1...Boiler body, 2a to 2d...Suspension pipe, 1
1, 12, 16, 17... Hanging beam, 13a, 13b
... Sleeve, 14, 15, 18, 19... Hanging rod.
Claims (1)
方向に配置された複数の吊下管で支持したものに
おいて、下方の伝熱管群を支持したまま上方の伝
熱管群を吊下管の一部とともに取替えるに当た
り、上方の伝熱管群の上下部に夫々水平方向に延
設された吊梁を吊下管に係合させ、上下部の吊梁
どうしを吊棒を介して連結したのち、上方の伝熱
管群が固着された吊下管部分を切除して上方の伝
熱管群とともに外部へ取出し、新しい吊下管に固
着された伝熱管群を搬入し、前記切除部において
吊下管どうしを接合することにより、下方の伝熱
管群を上方の伝熱管群より上部の吊下管に吊梁お
よび吊棒を介して支持させつつ上方の伝熱管群を
吊下管の一部とともに取替えることを特徴とする
伝熱管群の取替方法。1 In a case where a plurality of horizontally arranged heat exchanger tube groups are supported by a plurality of vertically arranged hanging tubes, the upper heat exchanger tube group is connected to one of the hanging tubes while the lower heat exchanger tube group is supported. In order to replace the upper heat exchanger tube group, horizontally extending suspension beams are engaged with the suspension tubes at the upper and lower parts of the upper heat exchanger tube group, and the upper and lower suspension beams are connected via hanging rods. The hanging tube part to which the heat exchanger tube group is fixed is cut off and taken out to the outside together with the upper heat exchanger tube group, the heat exchanger tube group fixed to the new hanging tube is carried in, and the hanging tubes are connected to each other at the cut out part. By joining, the lower heat exchanger tube group can be supported by the upper hanging tubes than the upper heat exchanger tube group via the hanging beams and hanging rods, and the upper heat exchanger tube group can be replaced together with a part of the hanging tubes. Features: How to replace a group of heat transfer tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21704382A JPS59109703A (en) | 1982-12-13 | 1982-12-13 | Method of replacing heat transfer pipe group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21704382A JPS59109703A (en) | 1982-12-13 | 1982-12-13 | Method of replacing heat transfer pipe group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59109703A JPS59109703A (en) | 1984-06-25 |
| JPS6333604B2 true JPS6333604B2 (en) | 1988-07-06 |
Family
ID=16697939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21704382A Granted JPS59109703A (en) | 1982-12-13 | 1982-12-13 | Method of replacing heat transfer pipe group |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59109703A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0328701U (en) * | 1989-07-28 | 1991-03-22 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6200910B2 (en) * | 2015-03-03 | 2017-09-20 | 三菱日立パワーシステムズ株式会社 | Heat transfer tube first aid tool and heat transfer tube first aid method |
| US9739475B2 (en) * | 2015-04-17 | 2017-08-22 | General Electric Technology Gmbh | Collar supported pressure parts for heat recovery steam generators |
| JP6687566B2 (en) * | 2017-07-10 | 2020-04-22 | 三菱日立パワーシステムズ株式会社 | Boiler furnace wall replacement method and boiler furnace wall temporary holding structure |
| CN113878303A (en) * | 2021-10-26 | 2022-01-04 | 上海电气核电设备有限公司 | Cold-packed alloy pipe dismantling method |
-
1982
- 1982-12-13 JP JP21704382A patent/JPS59109703A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0328701U (en) * | 1989-07-28 | 1991-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59109703A (en) | 1984-06-25 |
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