JPH0660535B2 - How to replace the tank bottom plate - Google Patents
How to replace the tank bottom plateInfo
- Publication number
- JPH0660535B2 JPH0660535B2 JP61122226A JP12222686A JPH0660535B2 JP H0660535 B2 JPH0660535 B2 JP H0660535B2 JP 61122226 A JP61122226 A JP 61122226A JP 12222686 A JP12222686 A JP 12222686A JP H0660535 B2 JPH0660535 B2 JP H0660535B2
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- plate part
- side plate
- plate portion
- separated
- 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 - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 239000012528 membrane Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000007796 conventional method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、液体、ガス体等を貯蔵する既設タンクの底
板の一部を取替えるタンク底板の取替え方法に関する。Description: TECHNICAL FIELD The present invention relates to a tank bottom plate replacement method for replacing part of a bottom plate of an existing tank that stores liquid, gas, and the like.
（従来の技術） 液体、ガス体等の貯蔵タンクは、一般的には、第３図に
示すように、複数枚の鋼製平板を接合して筒体状に形成
した側板部(1)と、当該側板部(1)の一方の開口面を塞ぐ
蓋板部(2)と、他方の開口面を塞ぐ底板部(3)および底板
部(3)を設置する基礎台部(4)で構成されている。この貯
蔵タンクも時間の経過によって、基礎台部(4)の変形
や、底板部(3)の側板部(1)との連接縁近傍の腐食等によ
り、底板部(3)における外周部のリング状の全部又は一
部を取替える必要が生じる。この場合従来例において
は、前記第３図に示すように、先ず取替えを必要とする
底板部(3)のリング状の全部又は一部を切り離す。次に
側板部(1)の底板部(3)寄りの外側周面に複数個の押上基
台を設けると共に、側板部(1)の変形を拘束するため、
側板部(1)の内側面に周方向又は軸方向に安定部材(5)を
設ける。さらに基礎台部(4)にジャッキ(6)を固定し、前
記押上基台を支点として蓋板部(2)と共に側板部(1)を押
上げ、基礎台部(4)と側板部(1)との間に隔接代を形成し
て作業空間を作り、切り離された底板部(3)を新な底板
部(3)に取替える方法が採用されている。(Prior Art) A storage tank for liquids, gas bodies, etc. generally has a side plate portion (1) formed by joining a plurality of steel flat plates into a cylindrical shape as shown in FIG. A base plate part (4) for installing the lid plate part (2) closing one opening surface of the side plate part (1), the bottom plate part (3) closing the other opening surface and the bottom plate part (3) Has been done. This storage tank also has a ring on the outer peripheral part of the bottom plate part (3) due to deformation of the base part (4) and corrosion near the connecting edge of the bottom plate part (3) with the side plate part (1) over time. It becomes necessary to replace all or part of the condition. In this case, in the conventional example, as shown in FIG. 3, first, all or part of the ring shape of the bottom plate portion (3) requiring replacement is cut off. Next, a plurality of push-up bases are provided on the outer peripheral surface of the side plate part (1) near the bottom plate part (3), and in order to restrain the deformation of the side plate part (1),
A stabilizing member (5) is provided on the inner surface of the side plate portion (1) in the circumferential direction or the axial direction. Further, the jack (6) is fixed to the foundation base (4), and the side plate (1) is pushed up together with the lid plate (2) with the push-up base as a fulcrum, and the foundation base (4) and the side plate (1) ) Is used to form a working space to create a working space, and the separated bottom plate part (3) is replaced with a new bottom plate part (3).
また、底板の下に加えた空気圧を利用してタンクを上下
動し、底板を取替える方法も考えられている。Also, a method of moving the tank up and down by using air pressure applied below the bottom plate and replacing the bottom plate has been considered.
（発明が解決しようとする問題点） 上述のジャッキ(6)を用いた従来例による方法では、押
上基台の取付および安定部材(5)の取付と、取付部の検
査および安全の確認に多くの日数を必要とする問題点
と、側板部(1)を押上るジャッキ(6)を基礎台部(4)に固
定するのに長時間を要する問題点等、底板部の取替えに
極めて多くの工数を必要とする問題点を有している。(Problems to be solved by the invention) In the conventional method using the jack (6) described above, many methods are used for mounting the push-up base, mounting the stabilizing member (5), and inspecting the mounting portion and confirming safety. It takes a long time to fix the jack (6) that pushes up the side plate part (1) to the foundation base part (4). There is a problem that requires man-hours.
また、空気圧を利用した従来例による方法では、空気圧
の気密性等に多くの問題点が考えられた。Further, in the conventional method using air pressure, many problems were considered in airtightness of air pressure.
（問題点を解決するための手段） この発明は、上記の問題点を解決するもので、そのタン
クの底板取替え方法の要旨は、全部又は一部の取替えを
必要とする底板部のリング状の外周部を側板部および底
板部の取替えを必要としない他の部分から切り離すと共
に、その切り離された側板部の底板部寄りの内周面と、
底板部のタンク軸心を中心とする同心円円周上の取替え
を必要としない切り離された底板部の上面を可撓性のあ
る受圧膜で連接し、当該受圧膜と側板部内周面と取替え
を必要としない底板部上面および蓋板部内面で形成され
る空間に加圧空気を導入して取替えを必要とする底板部
から切り離された側板部を、基礎台部と面接触する底板
部の上面から隔接させ、前記取替えを必要とする切り離
された底板部を新たな底板部と取替えた後、導入空気を
除圧して底板部から隔接された側板部を、基礎台部と面
接触する底板部の上に復元するものである。(Means for Solving Problems) The present invention is to solve the above problems, and the gist of the method for replacing the bottom plate of the tank is to describe a ring-shaped bottom plate part that requires replacement in whole or in part. The outer peripheral portion is separated from other portions that do not require replacement of the side plate portion and the bottom plate portion, and the inner peripheral surface of the separated side plate portion near the bottom plate portion,
No need for replacement on a concentric circle centered on the tank axis of the bottom plate part.The upper surface of the separated bottom plate part is connected by a flexible pressure receiving film, and the pressure receiving film and the inner peripheral surface of the side plate part are replaced. An upper surface of the bottom plate that comes into surface contact with the base part of the side plate separated from the bottom plate that needs replacement by introducing pressurized air into the space formed by the upper surface of the bottom plate and the inner surface of the lid plate that do not require And the separated bottom plate portion requiring replacement is replaced with a new bottom plate portion, the introduced air is depressurized, and the side plate portion separated from the bottom plate portion is brought into surface contact with the foundation base portion. It is to be restored on the bottom plate.
（実施例） この発明を図示の実施例に基づいて詳細に説明する。第
１図は、この発明に係るタンク底板の取替え方法を示す
タンク断面図である。図中(1)は側板部、(2)は蓋板部、
(3)が底板部、(7)が受圧膜、(8b)は受圧膜(7)の取付
具、(9)はタンクの平衡装置である。(Example) This invention is demonstrated in detail based on the Example shown in figure. FIG. 1 is a tank sectional view showing a method of replacing a tank bottom plate according to the present invention. In the figure, (1) is a side plate part, (2) is a cover plate part,
(3) is a bottom plate portion, (7) is a pressure receiving membrane, (8b) is a fixture of the pressure receiving membrane (7), and (9) is a tank balancer.
底板部(3)は側板部(1)に沿って侵入する雨水等により外
側面から腐食し、取替えを必要とする外周に位置するリ
ング状の取替え底板(10)を、ガス切断又は他の任意の方
法で側板部(1)および当該取替え底板(10)と連接する底
板部(3)から切り離す。この状態で取付具(8b)を、側板
部(1)の底板部(3)に近い内周面と、取替えを必要としな
い底板部(3)のタンク軸を中心とする同心円の円周上に
設ける。取付具(8b)は、第２図に示すように、まず、巾
状の帯板を同一高さに内周面全周に設け、側板部(1)の
内周面との接縁を全周若しくは隔接に溶接で固定して形
成した基台(11)を設ける。さらに該基台(11)に適当なピ
ッチで植込みボルト(12)を螺着固定する。また基台(11)
と同形に形成した座板(13)をナット(14)で螺子止めして
形成する。また底板部(3)に固定する取付具(8b)も一又
は複数個の巾板を円形状に形成して基台(15)を形成し、
同形に形成した座板(16)を螺子止めして形成する。受圧
膜(7)は合成樹脂材又はゴム材の平板をリング状に形成
し、外周縁部を側板部(1)の取付部(8b)で固定し、円周
縁部を底板部(3)に取付具(8b)で固定して設ける。The bottom plate part (3) is corroded from the outside by rainwater entering along the side plate part (1), and the ring-shaped replacement bottom plate (10) located on the outer periphery that needs replacement is gas-cut or other optional. The method is used to separate from the side plate part (1) and the bottom plate part (3) connected to the replacement bottom plate (10). In this state, mount the fixture (8b) on the inner peripheral surface of the side plate part (1) close to the bottom plate part (3) and on the circumference of a concentric circle centered on the tank axis of the bottom plate part (3) that does not require replacement. To be installed. As shown in FIG. 2, the attachment (8b) is first provided with width-shaped strips at the same height on the entire inner peripheral surface, and the side plate portion (1) is completely contacted with the inner peripheral surface. A base (11) formed by being fixed by welding is provided on the circumference or a gap. Further, the stud bolts (12) are screwed and fixed to the base (11) at an appropriate pitch. Base (11)
A seat plate (13) formed in the same shape as the above is screwed with a nut (14). Further, the fixture (8b) fixed to the bottom plate portion (3) also has one or more width plates formed in a circular shape to form a base (15),
The seat plate (16) formed in the same shape is screwed to form. The pressure receiving membrane (7) is formed of a synthetic resin or rubber flat plate in a ring shape, the outer peripheral edge portion is fixed by the mounting portion (8b) of the side plate portion (1), and the circular peripheral edge portion is fixed to the bottom plate portion (3). It is fixedly installed with the fixture (8b).
すなわち外周縁部を基台(11)と座板(13)で挟接してナッ
ト(14)で螺子固定し、内周縁部を基台(15)と座板(16)で
挟接し、ナット(14)で固定する。この場合受圧膜(7)の
外周縁および円周縁は、第２図に示すように、基台(11)
および基台(15)を越えて直接側板部(1)および底板部(3)
に接着するように形成し、受圧膜(7)に空気圧が作用し
たとき、外周縁および内周縁が側板部(1)および底板部
(3)とタイトに接着し空気の外部もれを防止するように
形成する。That is, the outer peripheral edge portion is sandwiched between the base (11) and the seat plate (13) and screwed with the nut (14), and the inner peripheral edge portion is sandwiched between the base (15) and the seat plate (16), and the nut ( Fix with 14). In this case, the outer peripheral edge and the circular peripheral edge of the pressure receiving membrane (7) are, as shown in FIG.
And beyond the base (15), the side plate (1) and the bottom plate (3) directly
When the air pressure acts on the pressure receiving membrane (7), the outer peripheral edge and the inner peripheral edge are formed on the side plate part (1) and the bottom plate part.
It is tightly adhered to (3) and is formed so as to prevent external leakage of air.
平衡装置(9)は、タンク縦断面上における側板部(1)に固
定端(17)を設け、取替えない底板部(3)および蓋板部(2)
の中央止部に滑車(18)(19)を設けて、ロープ(21)を通し
て重り(20)をタンク軸心上に吊下げる。当該固定端(1
7)、滑車(18)(19)を同一断面上でタンク軸心を対称軸と
して対称に蓋板部(2)に滑車(22)を、底板部(3)に滑車(2
3)を設け、固定端(24)を側板部(1)に設け、ロープ(25)
を介して同一の重り(20)を吊下げて形成する。該重り(2
0)の吊下げは、直交若しくは斜交する一若しくは二以上
の断面上に複数組設ける。The balancer (9) is provided with a fixed end (17) on the side plate part (1) on the tank vertical cross section, and the bottom plate part (3) and lid plate part (2) which are not replaced.
Pulleys (18) and (19) are provided at the center stop of the, and the weight (20) is hung on the tank axis through the rope (21). The fixed end (1
7), pulleys (18) and (19) on the same cross section symmetrically with the tank axis as the axis of symmetry, the pulley (2) is attached to the lid plate (2) and the pulley (2) is attached to the bottom plate (3).
3), the fixed end (24) on the side plate (1), the rope (25)
The same weight (20) is hung to form it. The weight (2
The suspension of 0) is provided in plural sets on one or two or more cross sections that intersect at right angles or intersect with each other.
次に側板部(1)と、受圧膜(7)、底板部(3)および蓋板部
(2)で形成される空間内に送風機(26)で空気を導入す
る。導入空気は、タンク内周面に空気圧力を作用し、受
圧膜(7)を弧状の湾曲面に変形すると共に、側板部(1)お
よび蓋板部(2)を浮き上らせ、側板部(1)と底板部(3)の
間に隔接代を形成する。この状態で当隔接代間に盤木を
挿入し、導入空気量を調整して空気圧力を下げ、側板部
(1)を盤木上に支持する。この状態で取替え底板(10)を
取り除き、新たな材料を補充して底板部(3)を完成す
る。その後導入空気の空気圧力を増加し、側板部(1)と
底板部(3)の隔接代を増して盤木を外し、空気圧を下げ
ながら隔接代を減じて側板部(1)を補修後の新たな底板
部(3)上に降下させる。側板部(1)が降下した後、側板部
(1)と底板部(3)の連接縁を溶接し内装物を取り除いてタ
ンク底板の取替え作業を終了する。この場合、側板部
(1)と蓋板部(2)が浮上中に傾くと、平衡装置(9)が働
き、浮き上がり側に重り(20)が引かれて、傾きが復元す
る。Next, the side plate part (1), the pressure receiving film (7), the bottom plate part (3) and the cover plate part.
Air is introduced by the blower (26) into the space formed in (2). The introduced air exerts an air pressure on the inner peripheral surface of the tank, deforms the pressure receiving film (7) into an arc-shaped curved surface, and lifts the side plate part (1) and the cover plate part (2) to make the side plate part. A separation margin is formed between (1) and the bottom plate portion (3). In this state, insert a board between the joints and adjust the amount of introduced air to lower the air pressure.
Support (1) on the board. In this state, the replacement bottom plate (10) is removed, and new material is replenished to complete the bottom plate portion (3). After that, the air pressure of the introduced air is increased to increase the separation margin between the side plate part (1) and the bottom plate part (3) to remove the plank. Lower it onto the new bottom plate (3). After the side plate (1) descends, the side plate
Weld the connecting edges of (1) and the bottom plate (3), remove the interior, and complete the tank bottom plate replacement work. In this case, the side plate
When (1) and the lid plate part (2) are tilted during floating, the balancer (9) works and the weight (20) is pulled to the floating side, and the tilt is restored.
次に第２の実施例について説明する。第１の実施例にお
いては、底板部(3)の取替えを必要とする取替え底板(1
0)は、側板部(1)と連接するリング状の外周部全域に渡
ったが、第２の実施例では、側板部(1)と連接するリン
グ状の外周部の一部の底板部(3)を取替える場合であ
る。すなわち取替え底板(10)が扇状リングの場合であ
る。この場合、取付具(27)は第４図に示すように、側板
部(1)の円周面に設ける基台(28)と底板部(3)に設ける基
台(29)と、この基台(28)と基台(29)の両端縁を結ぶ側板
部(1)の軸方向内面に設ける縦基台(30)と、底板部(3)の
半径方向に設ける横基台(31)を設けて形成する。また同
形の帯板で形成した座板(32)を螺着して形成する。この
場合第５図に示すように接着テープ(34)を使用して気密
性を高めることも可能である。第２の実施例における受
圧膜(33)は扇形リング状に形成し端縁部を取付具(27)で
挟接固定する。加圧空気は第１の実施例におけると同様
に、タンク内に導入され、受圧膜(33)を設けた側板部
(1)側が浮上り、対向する側板部(1)側は基礎台部(4)に
支持された状態にある。この状態で底板部(3)を第１の
実施例同様に取替える。この場合は特に平衡装置(9)は
必要としない。Next, a second embodiment will be described. In the first embodiment, the replacement bottom plate (1
0) extends over the entire area of the ring-shaped outer peripheral portion that is connected to the side plate portion (1), but in the second embodiment, a part of the bottom plate portion (of the ring-shaped outer peripheral portion that is connected to the side plate portion (1) ( 3) When replacing. That is, the case where the replacement bottom plate (10) is a fan ring. In this case, as shown in FIG. 4, the fixture (27) includes a base (28) provided on the circumferential surface of the side plate (1), a base (29) provided on the bottom plate (3), and the base (29). A vertical base (30) provided on the inner surface in the axial direction of the side plate part (1) connecting both edges of the base (28) and the base (29), and a horizontal base (31) provided in the radial direction of the bottom plate part (3). Are formed and formed. Further, the seat plate (32) formed of the same shaped strip plate is screwed and formed. In this case, as shown in FIG. 5, the airtightness can be enhanced by using an adhesive tape (34). The pressure receiving membrane (33) in the second embodiment is formed in a fan-shaped ring, and the end edge portion is sandwiched and fixed by the fitting (27). The pressurized air is introduced into the tank as in the first embodiment, and the side plate portion provided with the pressure receiving membrane (33) is provided.
The (1) side floats up, and the opposing side plate (1) sides are supported by the foundation table (4). In this state, the bottom plate portion (3) is replaced as in the first embodiment. In this case, the balancing device (9) is not necessary.
（効果） この発明によれば側板部および蓋板部は空気圧により浮
き上がるので、ジャッキを用いた従来例のような、押上
基台の溶接やジャッキの固定に多くの工数を必要としな
い。(Effect) According to the present invention, since the side plate portion and the lid plate portion are lifted up by the air pressure, a lot of man-hours are not required for welding the push-up base and fixing the jack unlike the conventional example using the jack.
また空気圧を利用した従来例と比べても、受圧膜はタン
ク内の圧力を受けて側板部内周面と底板部上面に押しつ
けられるので接着面の気密性もよく、かつ取付具は力を
受けないので、その装着も簡単であり、工数の掛からな
いタンク底板の取替え方法の提供が可能となる。Also, compared with the conventional example using air pressure, the pressure receiving membrane is pressed against the inner peripheral surface of the side plate and the upper surface of the bottom plate under the pressure in the tank, so the airtightness of the adhesive surface is good and the fixture does not receive any force. Therefore, it is possible to provide a method for replacing the tank bottom plate that is easy to install and does not require much man-hours.
第１図は、タンク底板の取替え方法を示すタンク断面
図、第２図は受圧膜部の一部を欠除した拡大断面図、第
３図は従来例を示すタンク断面図、第４図は他の実施例
を示す説明図、第５図は取付具部分の拡大断面図であ
る。 (1)……側板部 (2)……蓋板部 (3)……底板部 (4)……基礎台部 (7)(33)……受圧膜 (8b)(27)……取付具 (9)……平衡装置 (11)(15)(28)(29)……基台 (26)……送風機FIG. 1 is a sectional view of a tank showing a method for replacing a tank bottom plate, FIG. 2 is an enlarged sectional view in which a part of a pressure receiving membrane is cut away, FIG. 3 is a sectional view of a tank showing a conventional example, and FIG. FIG. 5 is an explanatory view showing another embodiment, and FIG. 5 is an enlarged sectional view of a fitting part. (1) ...... Side plate (2) ...... Lid plate (3) ...... Bottom plate (4) ...... Foundation base (7) (33) ...... Pressure receiving membrane (8b) (27) ...... Fixture (9) …… Balancer (11) (15) (28) (29) …… Base (26) …… Blower
Claims (1)
を塞ぐ蓋板部および他方の開口面を塞ぐ底板部からな
り、底板部が基礎台部と面接触して支持されるタンクの
底板取替え方法において、全部又は一部の取替えを必要
とする底板部のリング状の外周部を側板部および底板部
の取替えを必要としない他の部分から切り離すと共に、
その切り離された側板部の底板部寄りの内周面と、底板
部のタンク軸心を中心とする同心円円周上の取替えを必
要としない切り離された底板部の上面を可撓性のある受
圧膜で連接し、当該受圧膜と側板部内周面と取替えを必
要としない底板部上面および蓋板部内面で形成される空
間に加圧空気を導入して取替えを必要とする底板部から
切り離された側板部を、基礎台部と面接触する底板部の
上面から隔接させ、前記取替えを必要とする切り離され
た底板部を新たな底板部と取替えた後、導入空気を除圧
して底板部から隔接された側板部を、基礎台部と面接触
する底板部の上に復元することを特徴とするタンク底板
の取替え方法。1. A cylindrical side plate portion, a lid plate portion that closes one opening surface of the side plate portion, and a bottom plate portion that closes the other opening surface of the side plate portion. In the method of replacing the bottom plate of the tank, while separating the ring-shaped outer peripheral portion of the bottom plate portion that requires replacement in whole or in part from other portions that do not require replacement of the side plate portion and the bottom plate portion,
Flexible pressure receiving between the inner peripheral surface of the separated side plate part near the bottom plate part and the upper surface of the separated bottom plate part that does not require replacement on a concentric circle centered on the tank axis of the bottom plate part It is connected by a membrane, and it is separated from the bottom plate part that needs replacement by introducing pressurized air into the space formed by the pressure receiving film and the inner peripheral surface of the side plate part that does not require replacement and the bottom plate part upper surface and the lid plate part inner surface. The side plate part is separated from the upper surface of the bottom plate part that is in surface contact with the base part, and the separated bottom plate part requiring the replacement is replaced with a new bottom plate part. A method for replacing a tank bottom plate, characterized in that the side plate part separated from the above is restored on the bottom plate part that is in surface contact with the base part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61122226A JPH0660535B2 (en) | 1986-05-29 | 1986-05-29 | How to replace the tank bottom plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61122226A JPH0660535B2 (en) | 1986-05-29 | 1986-05-29 | How to replace the tank bottom plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62280460A JPS62280460A (en) | 1987-12-05 |
| JPH0660535B2 true JPH0660535B2 (en) | 1994-08-10 |
Family
ID=14830687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61122226A Expired - Fee Related JPH0660535B2 (en) | 1986-05-29 | 1986-05-29 | How to replace the tank bottom plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660535B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57114489A (en) * | 1980-12-24 | 1982-07-16 | Shinken Kogyo Kk | Method of construction of replacement of annular and bottom plate of dangerous article storage tank |
-
1986
- 1986-05-29 JP JP61122226A patent/JPH0660535B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62280460A (en) | 1987-12-05 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |