JPH01267190A - Annular plate replacement method for tank - Google Patents
Annular plate replacement method for tankInfo
- Publication number
- JPH01267190A JPH01267190A JP63084999A JP8499988A JPH01267190A JP H01267190 A JPH01267190 A JP H01267190A JP 63084999 A JP63084999 A JP 63084999A JP 8499988 A JP8499988 A JP 8499988A JP H01267190 A JPH01267190 A JP H01267190A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- annular plate
- annular
- side plate
- tank
- 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
- 238000000034 method Methods 0.000 title claims description 22
- 238000003780 insertion Methods 0.000 claims abstract description 17
- 230000037431 insertion Effects 0.000 claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、タンクの底部を構成するアニユラ板を取替え
る、タンクのアニユラ板取替工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tank annular plate replacement method for replacing an annular plate constituting the bottom of a tank.
［従来の技術］
一般に、石油の貯蔵タンク等は、底板、および該底板の
周縁部に接合されるアニユラ板により底部を形成し、こ
のアニユラ板の上にタンクの側板を設け、これによって
構成されるタンク本体の上部に固定屋根もしくは浮屋根
を設けることにて構成されている。この種のタンクにあ
っては、その底部、特にアニユラ板の部分に腐食を生じ
やすく、アニユラ板の取替えが必要な場合がある。[Prior Art] In general, an oil storage tank or the like has a bottom formed by a bottom plate and an annular plate joined to the peripheral edge of the bottom plate, and a side plate of the tank is provided on the annular plate. It consists of a fixed roof or a floating roof on top of the tank body. In this type of tank, corrosion tends to occur at the bottom, especially at the annular plate, and the annular plate may need to be replaced.
従来、アニユラ板の取替工法として、特開昭５８−１１
１１０４７８号公報に記載の如く、ジヤツキアップ工法
、もしくはピース工法等がある。Conventionally, as a replacement method for annual plates, JP-A-58-11
As described in Japanese Patent No. 110478, there is a jack-up method, a piece method, etc.
［発明が解決しようとする課題］
ジヤツキアップ工法は、■タンク側板の各所にジヤツキ
受台を取付け、側板をアニユラ板から切り離した状態に
て、ジヤツキによりタンク全体を持上げ、■タンクを持
上げた状態下で、新アニユラ板に取替え、その溶接後に
ジヤツキダウンさせる工法である。この工法は、■ジヤ
ツキやジヤツキ受台等の大がかりな設備やジヤツキのア
ップ／ダウンのために多人数を必要とし、■ジヤツキア
ップ期間中における地震や強風に対する安全対策が必要
であり、経済性や安全性に問題点を有している。[Problem to be solved by the invention] The jack-up method consists of: ■ attaching jack holders to various parts of the tank side plate, lifting the entire tank with jacks with the side plate separated from the annual plate; The method is to replace it with a new annual plate and jack it down after welding it. This construction method requires ■large-scale equipment such as jacks and jack stands, and a large number of people to raise and lower the jacks, and ■safety measures against earthquakes and strong winds during the jack-up period, making it economical and safe. I have a problem with my sexuality.
ピース工法は、タンクを持上げることなく、■側板の最
下部を例えば３０〜５０層■高さ切断する一方、タンク
全体を、側板に固着されるサポートピースによって支持
し、■アニユラ板の取替後、サポートピースの下端部を
小刻みに切除してタンクを順次下降させ、■下降後に側
板と新アニユラ板とを溶接する工法である。この工法は
、■側板を短縮するものであるからタンク容量を低減し
たり、タンク接続配管のレベル調整のための改造が必要
となり、■タンクの下降作業が困難であるばかりか危険
をともなう等、タンク性能の確保、作業性や安全性に問
題点を有している。The piece construction method involves cutting the lowest part of the side plate to a height of, for example, 30 to 50 layers, without lifting the tank, while supporting the entire tank with a support piece that is fixed to the side plate, and replacing the annual plate. After that, the lower end of the support piece is cut out in small increments and the tank is lowered one by one. After lowering, the side plate and new annual plate are welded together. This construction method shortens the side plates, which requires modification to reduce the tank capacity and adjust the level of the tank connection piping, and makes lowering the tank difficult and dangerous. There are problems with ensuring tank performance, workability, and safety.
本発明は、アニユラ板の取替えに際し、タンク、件部を
損なわず、かつ経済性、作業性および安全性を向上する
ことを目的とする。An object of the present invention is to improve economic efficiency, workability, and safety without damaging the tank or part when replacing the annular plate.
［課題を解決するための手段］
本発明に係るタンクのアニユラ板取替工法は、取替アニ
ユラ板を側板ならびに隣接アニユラ板および底板から切
り離す工程と、切り離された取替アニユラ板を撤去する
工程と、取替アニユラ板の撤去の前段階または後段階に
て、取替アニユラ板の撒去部における側板際のタンク下
地層に新アニユラ板の差込空間を形成する工程と、新ア
ニユラ板を上記差込空間から前記取替アニユラ板の撤去
部に挿入する工程と、新アニユラ板と側板との間、およ
び隣接アニユラ板の取替アニユラ板寄りの部分であって
予め側板から切り離されている部分と側板との間にギャ
ップを形成する工程と、上記ギャップ内にて新アニユラ
板と隣接アニユラ板の側板直下にて相接する部分を溶接
する工程と、新アニユラ板および隣接アニユラ板のそれ
ぞれにおける、新たに取替アニユラ板寄りとなる部分を
除く部分を側板の下端部に引寄せて該下端部に溶接する
工程と、新アニユラ板を底板に溶接する工程と、側板に
溶接された新アニユラ板に対応する前記差込空間にタン
ク下地層を充填する工程とを有してなるようにしたもの
である。[Means for Solving the Problems] The tank annular plate replacement method according to the present invention includes the steps of separating the replacement annular plate from the side plate and the adjacent annular plate and the bottom plate, and removing the separated replacement annular plate. , At the stage before or after the removal of the replacement annual plate, there is a step of forming an insertion space for the new annual plate in the tank base layer next to the side plate at the part where the replacement annual plate is removed, and the process of removing the new annual plate as described above. The step of inserting the replacement annular plate into the removed part from the insertion space, the part between the new annular plate and the side plate, and the part of the adjacent annular plate near the replacement annular plate that has been separated from the side plate in advance. a step of forming a gap between the side plate and the side plate, a step of welding the parts of the new annular plate and the adjacent annular plate that meet directly below the side plate within the gap, and a process of welding the new annular plate and the adjacent annular plate, respectively. , a process of pulling the part of the new annular plate excluding the part closer to the side plate to the lower end of the side plate and welding it to the lower edge, a process of welding the new annular plate to the bottom plate, and a process of welding the new annular plate to the side plate. and filling the insertion space corresponding to the plate with a tank base layer.
［作用］
本発明によれば、差込空間の形成により、新アニユラ板
をタンク底部の定位置に確実かつ容易に挿入できる。[Function] According to the present invention, by forming the insertion space, the new annual plate can be reliably and easily inserted into a fixed position at the bottom of the tank.
また、新アニユラ板と側板との間、および隣接アニユラ
板と側板との間に溶接作業のためのギャップを形成し、
これによりそれらアニユラ板同士を側板直下にて確実か
つ容易に溶接できる。In addition, gaps for welding work are formed between the new annular plate and the side plate, and between the adjacent annular plate and the side plate,
Thereby, the annual plates can be reliably and easily welded directly under the side plates.
また、新アニユラ板および隣接アニユラ板を側板の下端
部に引寄せて該下端部に溶接することにより、それらア
ニユラ板と側板とを確実かつ容易に溶接できる。Further, by drawing the new annual plate and the adjacent annual plate to the lower end of the side plate and welding them to the lower end, the annual plate and the side plate can be reliably and easily welded.
したがって２本発明によれば、■側板を短縮することな
くアニユラ板を取替えるので、タンク容量は現状を維持
でき、タンク接続配管のレベル調整を必要とすることも
ない、また、■ジヤツキやジヤツキ受台等の大がかりな
設備やジヤツキのアップ／ダウンのための多人数を必要
としない。Therefore, according to the present invention, (1) the annular plate is replaced without shortening the side plate, the current tank capacity can be maintained, and there is no need to adjust the level of the tank connection piping; It does not require large-scale equipment such as a stand or a large number of people to raise and lower the jack.
また、■タンク本体を持上げたり、下降させることがな
く、現状設置のままで施工できるから、作業性がよく、
危険をともなうこともない、すなわち、アニユラ板の取
替えに際し、タンク性能を損なわず、かつ経済性、作業
性および安全性を向上することができる。In addition, there is no need to lift or lower the tank body, and work can be done as it is currently installed, making work easier.
There is no danger involved, that is, tank performance is not impaired when replacing the annular plate, and economy, workability, and safety can be improved.
［実施例］
第１図は本発明によるアニユラ板取替過程を示す正面図
、第２図は第１図の■−■線に沿う断面図、第３図は補
強リングの取付状態を示す模式図、第４図はタンク底部
の要部を示す平面図、第５図はアニユラ板引寄せ治具の
取付状態を示す模式図、第６図は第５図の■−■線に沿
う矢視図。[Example] Fig. 1 is a front view showing the annular plate replacement process according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a schematic diagram showing the installation state of the reinforcing ring. , Fig. 4 is a plan view showing the main parts of the bottom of the tank, Fig. 5 is a schematic diagram showing the installation state of the annular plate pulling jig, and Fig. 6 is a view taken along the line ■-■ in Fig. 5. .
第７図はタンク底部の全体を示す平面図、第８図はタン
クの側板と底部の接合状態を示す断面図である。FIG. 7 is a plan view showing the entire bottom of the tank, and FIG. 8 is a sectional view showing the state of connection between the side plate and the bottom of the tank.
タンク１０は、第７図、第８図に示す如く、底板１１、
および該底板１１の周縁部に接合されるアニユラ板１２
により底部を形成し、このアニユラ板１２の上に側板１
３を設け、これによって形成されるタンク本体の上部に
固定屋根もしくは浮屋根を設けることにて構成されてい
る。なお、タンク１０は、底板１１．アニユラ板１２の
外面の腐食を防止するため、底板１１、アニユラ板１２
が敷設されるタンク下地層（タンク基礎の上部）をアス
ファルトサンド等からなる防食層１４にて形成している
。１５は犬走り舗装部である。As shown in FIGS. 7 and 8, the tank 10 includes a bottom plate 11,
and an annular plate 12 joined to the peripheral edge of the bottom plate 11.
form the bottom part, and the side plate 1 is placed on top of this annular plate 12.
3, and a fixed roof or a floating roof is provided on the upper part of the tank body formed thereby. Note that the tank 10 has a bottom plate 11. In order to prevent corrosion of the outer surface of the annular plate 12, the bottom plate 11 and the annular plate 12 are
The tank base layer (the upper part of the tank foundation) on which the tank is laid is formed of an anti-corrosion layer 14 made of asphalt sand or the like. 15 is the Inubashiri pavement section.
しかして、上記タンク１０のアニユラ板１２は以下の如
くにて取替えられる。The annular plate 12 of the tank 10 is replaced as follows.
（１）取替アニユラ板１２Ａ、および該取替アニユラ板
１２Ａに隣り合う隣接アニユラ板１２Ｂに接している側
板１３の下部に、該側板１３の変形防止（真円保持）の
ための補強輪１６を取付ける（第３図（Ａ）参照）、全
アニユラ板１２を取替える場合には、側板１３の全周に
補強輪１６を取付ける。なお、補強輪１６は、側板１３
の外側部に溶接される第３図（Ｂ）、（Ｃ）に示す如く
の取付具１７．１８を介して取付けられる。(1) A reinforcing ring 16 for preventing deformation of the side plate 13 (maintaining a perfect circle) is provided at the lower part of the side plate 13 in contact with the replacement annular plate 12A and the adjacent annular plate 12B adjacent to the replacement annular plate 12A. (see FIG. 3(A)). When replacing all annular plates 12, a reinforcing ring 16 is attached to the entire circumference of the side plate 13. Note that the reinforcing ring 16 is attached to the side plate 13.
It is attached via fittings 17, 18 as shown in FIGS. 3(B) and 3(C) which are welded to the outer side of the.
（２）■取替アニユラ板１２Ａを側板１３ならびに隣接
アニユラ板１２Ｂおよび底板１１がら切り離ス（第４図
参照）、第４図（７）Ａ、Ｂ、Ｃ，Ｄは取替アニユラ板
１２Ａを切り離す溶接線であり、施工順序は一般的にＡ
、Ｂ、Ｃ，Ｄの順である。(2) ■ Cut out the replacement annular plate 12A from the side plate 13 and the adjacent annular plate 12B and bottom plate 11 (see Figure 4), Figure 4 (7) A, B, C, and D are the replacement annular plates 12A. This is the weld line that separates the
, B, C, D in that order.
■アニユラ板１２を部分取替えする場合には、隣接アニ
ユラ板１２Ｂと側板１３の接合部であって取替アニユラ
板１２Ａ寄りの部分（例えば長さ文＝１〜１．５ｍ）を
も切り離す（第４図参照）。■When partially replacing the annular plate 12, also cut off the part (for example, length = 1 to 1.5 m) of the joint between the adjacent annular plate 12B and the side plate 13 that is closer to the replacement annular plate 12A. (See Figure 4).
（３）上記（２）にて切り離された取替アニユラ板１２
Ａを側板１３の下部から外部へ引出して撤去する。(3) Replacement annular plate 12 separated in (2) above
A is pulled out from the bottom of the side plate 13 and removed.
（４）■上記（３）の後段階にて、取替アニユラ板１２
Ａの撤去部に対応する防食層１４の全部または一部を必
要に応じて更新する。この時、取替アニユラ板１２Ａの
撤去部における側板際の防食層１４を、例えば長さｗ
＝ ５００■■の範囲にわたって、例えば深さｄ ＝
３０ｍｍ程度低く設定し、この部分を新アニユラ板１２
Ｃのための差込空間１９とする（第１図、第２図参照）
。(4) ■ At the stage after (3) above, replace the annular plate 12.
All or part of the corrosion protection layer 14 corresponding to the removed portion A is updated as necessary. At this time, the anti-corrosion layer 14 near the side plate in the removed portion of the replacement annual plate 12A is
= over a range of 500 ■■, e.g. depth d =
Set it about 30mm lower and install the new annual plate 12 in this part.
This is the insertion space 19 for C (see Figures 1 and 2).
.
■ただし、本発明の実施において、上記差込空間は、上
記（３）の前段階にて、切り離された取替アニユラ板１
２Ａと側板１３の下端部との間にくさびを打込み、これ
によって押下げられる取替アニユラ板１２Ａにて防食Ｍ
１４を圧密沈下せしめることによっても形成できる。■However, in the implementation of the present invention, the above insertion space is the replacement annular plate 1 that has been separated in the previous stage of (3) above.
Corrosion protection M
14 can also be formed by consolidation settlement.
（５）次に、新アニユラ板１２Ｃを上記差込空間１９か
ら前記取替アニユラ板１２Ａの撤去部（定位置）に搬入
する。(5) Next, carry the new annular plate 12C from the insertion space 19 into the removal section (fixed position) of the replacement annular plate 12A.
（６）新アニユラ板１２Ｃに引寄せ治具２０を溶接し、
側板１３の内側部に引寄せビーム２１を溶接する。引寄
せビーム２１は引寄せ治具２０の内部に挿通せしめられ
る（第５図、第６図参照）。(6) Weld the pulling jig 20 to the new annual plate 12C,
A pulling beam 21 is welded to the inner side of the side plate 13. The pulling beam 21 is inserted into the pulling jig 20 (see FIGS. 5 and 6).
引寄せ治具２０と引寄せビーム２１は引寄せくさび２２
とともに機能し、後述する（８）の工程にて新アニユラ
板１２Ｃを側板１３の下端部に引寄せる作用をなす。The pulling jig 20 and the pulling beam 21 are a pulling wedge 22
It also functions to draw the new annual plate 12C to the lower end of the side plate 13 in the step (8) described later.
（７）新アニユラ板１２ｃと側板１３との間、および隣
接アニユラ板１２Ｂの取替アニユラ板寄りの部分であっ
て前述の（２）■にて予め側板１３から切り離されてい
る部分と側板１３との間に、くさび２３を打込み、それ
らアニユラ板１２Ｂ、１２Ｃと側板１３の間にギャップ
２４を形成する（第、１図、第２図参照）。(7) Between the new annular plate 12c and the side plate 13, and the part of the adjacent annular plate 12B closer to the replacement annular plate, which has been previously separated from the side plate 13 in (2) (2) above, and the side plate 13 A wedge 23 is driven in between the annular plates 12B, 12C and the side plate 13 to form a gap 24 (see FIGS. 1 and 2).
（８）上記ギャップ２４の内部にて新アニユラ板１２Ｃ
と隣接アニユラ板１２Ｂの側板直下にて相接する部分を
溶接し、その後検査する。(8) New annual plate 12C inside the above gap 24
The adjacent portion of the adjacent annual plate 12B directly below the side plate is welded, and then inspected.
（９）新アニユラ板１２Ｃおよび隣接アニュラ板１２Ｂ
のそれぞれにおける、新たに取替アニユラ板寄りとなる
部分（第１図の長さ文＝１〜１．５ｍの部分）を除く部
分を、前述の引寄せ治具２０、引寄せビーム２１、引寄
せくさび２２により、側板１３の下端部に引寄せて該下
端部に溶接する（第５図、第６図参照）。(9) New annular plate 12C and adjacent annular plate 12B
, except for the part that will be closer to the new replacement annular plate (length section in Figure 1 = 1 to 1.5 m), using the above-mentioned pulling jig 20, pulling beam 21, and pulling beam 21. It is pulled to the lower end of the side plate 13 by the wedge 22 and welded to the lower end (see FIGS. 5 and 6).
なお、新アニユラ板１２Ｇおよび隣接アニユラ板１２Ｂ
の、新たに取替アニユラ板寄りとなる部分（文）は、前
述の（２）■における長さ文の部分におけると同様に、
前述の（７） 、 （８）における如く新たに挿入され
る新アニユラ板１２Ｃと相接して溶接される部分である
から、側板１３と溶接せずに切り離し状態を保っておく
。In addition, the new annual plate 12G and the adjacent annual plate 12B
The part (sentence) that is newly closer to the replacement Annyura board is the same as the part of the length sentence in (2) ■ above,
Since this is the part to be welded in contact with the newly inserted new annual plate 12C as in (7) and (8) above, it is not welded to the side plate 13 and is kept separated.
（ｌＯ）新アニユラ板１２Ｃを相接することとなる底板
１１に溶接する。(lO) Weld the new annual plate 12C to the bottom plate 11 that will be in contact with it.
（１１）側板１３に溶接された新アニユラ板１２Ｃに対
応する前記差込空間１９に防食層１４を充填し、圧密固
化する。(11) The insertion space 19 corresponding to the new annual plate 12C welded to the side plate 13 is filled with the anti-corrosion layer 14 and consolidated.
上記（１）〜（１１）の各工程からなる取替作業を、タ
ンク１０におけるアニユラ板取替領域の全範囲にわたり
順次くり返す、なお、上記取替作業は、施工時のバラン
スを考慮してタンク１０の周方向の複数位置で同時に着
工できる０例えば、タンク１０の直径方向にて相対する
複数位Ｎ（２位置または４位置等）にて同時に着手でき
、あるいは、タンクｌＯの周方向にて等間隔をなす複数
位置（３位置または５位置等）にて同時に着手できる。The replacement work consisting of each of the steps (1) to (11) above is repeated sequentially over the entire range of the annular board replacement area in the tank 10.The above replacement work is done in consideration of the balance at the time of construction. For example, work can be started simultaneously at multiple positions N (2 positions or 4 positions, etc.) that are opposite to each other in the diametrical direction of the tank 10, or in the circumferential direction of the tank 10, etc. It is possible to simultaneously start work at multiple positions (3 positions, 5 positions, etc.) that are spaced apart.
なお、上記（１）の補強輪１６を設ける工程は、側板１
３が薄肉の場合には必須であるが、例えＪｆ２５ｍｍ厚
み以上の厚肉である場合には必須でない。Note that the step of providing the reinforcing ring 16 in (1) above is performed on the side plate 1.
3 is essential if it is thin, but not essential if it is thick, for example, Jf 25 mm or more.
次に、上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
上記実施例によれば、差込空間１９の形成により、新ア
ニユラ板１２Ｃをタンク底部の定位置に確実かつ容易に
挿入できる。According to the above embodiment, by forming the insertion space 19, the new annular plate 12C can be reliably and easily inserted into a fixed position at the bottom of the tank.
また、〈さび２３の打込みにより、新アニユラ板１２Ｃ
と側板１３との間、および隣接アニユラ板１２Ｂと側板
１３との間に溶接作業のためのギャップ２４を形成し、
これによりそれらアニユラ板１２Ｂ、１２Ｃ同士を側板
直下にて確実かつ容易に溶接できる。In addition, by driving Rust 23, new annual plate 12C
and the side plate 13, and between the adjacent annual plate 12B and the side plate 13, forming a gap 24 for welding work,
Thereby, the annual plates 12B and 12C can be reliably and easily welded together directly under the side plates.
また、新アニユラ板１２Ｇおよび隣接アニユラ板１２Ｂ
を側板１３の下端部に引寄せて該下端部に溶接すること
により、それらアニユラ板１２Ｃ，１２Ｂと側板１３と
を確実かつ容易に溶−接できる。In addition, the new annual plate 12G and the adjacent annual plate 12B
By drawing the annular plates 12C and 12B to the lower end of the side plate 13 and welding them to the lower end, the annular plates 12C and 12B and the side plate 13 can be reliably and easily welded.
したがって、上記実施例によれば、■側板１３を短縮す
ることなくアニユラ板１２を取替えるので、タンク容量
は現状を維持でき、タンク接続配管のレベル調整を必要
とすることもない、また、■ジヤツキやジヤツキ受台等
の大がかりな設備やジヤツキのアップ／ダウンのための
多人数を必要としない、また、■タンク本体を持上げた
り、下降させることがなく、現状設置のままで施工でき
るから、作業性がよく、危険をともなうこともない、す
なわち、アニユラ板１２の取替えに際し、タンク性能を
損なわず、かつ経済性、作業性および安全性を向上する
ことができる。Therefore, according to the above embodiment, (1) the annular plate 12 is replaced without shortening the side plate 13, so the current tank capacity can be maintained and there is no need to adjust the level of the tank connection piping; There is no need for large-scale equipment such as a jack stand or a large number of people to raise/lower the jack, and there is no need to lift or lower the tank body, and the work can be done as it is installed. In other words, when replacing the annular plate 12, tank performance is not impaired, and economy, workability, and safety can be improved.
［発明の効果］
以上のように１本発明によれば、アニユラ板の取替えに
際し、タンク性能を損なわず、かつ経済性、作業性およ
び安全性を向上することができる。[Effects of the Invention] As described above, according to the present invention, when replacing the annular plate, it is possible to improve economical efficiency, workability, and safety without impairing tank performance.
第１図は本発明によるアニユラ板取替過程を示す正面図
、ｖＩｚ図は第１図のＨ−■線に沿う断面図、第３図は
補強リングの取付状態を示す模式図、第４図はタンク底
部の要部を示す平面図、第５図はアニユラ板引寄せ治具
の取付状態を示す模式図、第６図は第５図の７ｌ−Ｖｌ
線に沿う矢視図、第７図はタンク底部の全体を示す平面
図、第８図はタンクの側板と底部の接合状態を示す断面
図である。
１０川タンク。
１２・・・アニユラ板、
１２Ａ・・・取替アニユラ板、
１２Ｂ・・・隣接アニユラ板、
１２Ｃ・・・新アニユラ板、
１３・・・側板、
１４・・・防食層、
１９・・・差込空間、
２０・・・引寄せ治具、
２１・・・引寄せビーム、
２２・・・引寄せくさび、
２３・・・くさび、
２４…ギヤツプ・
代理人 弁理士 塩 川 修 油
筒１図
■
第２図Fig. 1 is a front view showing the annular plate replacement process according to the present invention, vIz is a sectional view taken along the line H-■ in Fig. 1, Fig. 3 is a schematic diagram showing the installation state of the reinforcing ring, and Fig. 4 is a A plan view showing the main parts of the bottom of the tank, Figure 5 is a schematic diagram showing how the annular plate pulling jig is installed, and Figure 6 is the 7l-Vl shown in Figure 5.
FIG. 7 is a plan view showing the entire bottom of the tank, and FIG. 8 is a sectional view showing the state of connection between the side plate and the bottom of the tank. 10 river tank. 12... Annular plate, 12A... Replacement annual plate, 12B... Adjacent annual plate, 12C... New annual plate, 13... Side plate, 14... Corrosion protection layer, 19... Difference Including space, 20... Pulling jig, 21... Pulling beam, 22... Pulling wedge, 23... Wedge, 24... Gap agent Patent attorney Osamu Shiokawa Oil cylinder 1 diagram■ Figure 2
Claims (2)
よび底板から切り離す工程と、切り離された取替アニュ
ラ板を撤去する工程と、取替アニュラ板の撤去の前段階
または後段階にて、取替アニュラ板の撤去部における側
板際のタンク下地層に新アニュラ板の差込空間を形成す
る工程と、新アニュラ板を上記差込空間から前記取替ア
ニュラ板の撤去部に挿入する工程と、新アニュラ板と側
板との間、および隣接アニュラ板の取替アニュラ板寄り
の部分であって予め側板から切り離されている部分と側
板との間にギャップを形成する工程と、上記ギャップ内
にて新アニュラ板と隣接アニュラ板の側板直下にて相接
する部分を溶接する工程と、新アニュラ板および隣接ア
ニュラ板のそれぞれにおける、新たに取替アニュラ板寄
りとなる部分を除く部分を側板の下端部に引寄せて該下
端部に溶接する工程と、新アニュラ板を底板に溶接する
工程と、側板に溶接された新アニュラ板に対応する前記
差込空間にタンク下地層を充填する工程とを有してなる
タンクのアニュラ板取替工法。(1) The process of separating the replacement annular plate from the side plate and the adjacent annular plate and bottom plate, the process of removing the separated replacement annular plate, and the process of replacing the replacement annular plate before or after the removal of the replacement annular plate. A step of forming an insertion space for a new annular plate in the tank base layer next to the side plate in the removed part of the annular plate, a step of inserting the new annular plate from the insertion space into the removed part of the replacement annular plate, The step of forming a gap between the annular plate and the side plate, and between the side plate and the part near the annular plate that has been separated from the side plate in advance, and replacing the adjacent annular plate. The process of welding the adjacent parts of the annular plate and the adjacent annular plate directly below the side plate, and the process of welding the parts of the new annular plate and the adjacent annular plate, excluding the part closer to the newly replaced annular plate, to the lower end of the side plate. a step of welding the new annular plate to the bottom plate; and a step of filling the insertion space corresponding to the new annular plate welded to the side plate with a tank base layer. Tank annular plate replacement method.
しての底板防食層を削除するものである請求項１記載の
タンクのアニュラ板取替工法。(2) The tank annular plate replacement method according to claim 1, wherein the step of forming the insertion space removes a bottom plate anti-corrosion layer as a tank base layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63084999A JPH01267190A (en) | 1988-04-08 | 1988-04-08 | Annular plate replacement method for tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63084999A JPH01267190A (en) | 1988-04-08 | 1988-04-08 | Annular plate replacement method for tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01267190A true JPH01267190A (en) | 1989-10-25 |
Family
ID=13846332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63084999A Pending JPH01267190A (en) | 1988-04-08 | 1988-04-08 | Annular plate replacement method for tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01267190A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61287591A (en) * | 1984-04-28 | 1986-12-17 | 有限会社 藤倉工業 | Method of exchanging annular plate for tank |
-
1988
- 1988-04-08 JP JP63084999A patent/JPH01267190A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61287591A (en) * | 1984-04-28 | 1986-12-17 | 有限会社 藤倉工業 | Method of exchanging annular plate for tank |
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