JPH0139951B2 - - Google Patents
Info
- Publication number
- JPH0139951B2 JPH0139951B2 JP58249206A JP24920683A JPH0139951B2 JP H0139951 B2 JPH0139951 B2 JP H0139951B2 JP 58249206 A JP58249206 A JP 58249206A JP 24920683 A JP24920683 A JP 24920683A JP H0139951 B2 JPH0139951 B2 JP H0139951B2
- Authority
- JP
- Japan
- Prior art keywords
- floating roof
- tank
- sealing material
- side plate
- sloshing
- 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
- 239000003566 sealing material Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 28
- 239000007788 liquid Substances 0.000 description 16
- 230000001133 acceleration Effects 0.000 description 8
- 238000013016 damping Methods 0.000 description 8
- 239000002783 friction material Substances 0.000 description 8
- 239000010779 crude oil Substances 0.000 description 7
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は浮屋根式の油タンクが地震力を受けた
ときに液面の動揺に伴ない浮屋根が揺動するのを
自動的に抑制させる油タンクの浮屋根のスロツシ
ング抑制装置に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention automatically suppresses the shaking of the floating roof due to fluctuations in the liquid level when the floating roof type oil tank is subjected to seismic force. This invention relates to a sloshing suppression device for a floating roof of an oil tank.
浮屋根式の油タンクは、第１図に示すようにタ
ンクａ内に収容した原油等ｂの液面に浮屋根ｃを
浮上させて置き、該浮屋根ｃの外周縁に、ニトロ
ゴムなどよりなるチユーブｄと該チユーブｄ内に
ウレタンの如き弾性材料ｅを入れて全体として弾
性をもたせたシール材ｆを取り付け、該シール材
ｆにより浮屋根ｃの外周面とタンク側板の内周面
との間をシールしながら原油等ｂの液位の変動に
追従して上下動できるようにし、原油や揮発ガス
等ｂが外部へ流出するのを防止するようにしてあ
る。上記シール材ｆの表面のチユーブｄをゴム製
としてあるのは、若しチユーブｄを金属製とした
ならば地震時などの液面の変動に伴なつて浮屋根
ｃが揺動するときタンク側板内面との摩擦によつ
て発火することがあつて火災のおそれがあるので
これを防止するためであり、弾性体としたシール
材ｆの表面をタンク側板内面に押し付けることに
より液や揮発ガスの流出を防止するようにしてあ
るだけで、浮屋根の揺動を抑制する機能を有して
いない。このことは、摩擦力をＦ、摩擦係数を
μ、押付力をとしたとき、摩擦力Ｆ＝μの関
係があり、シール材ｆのタンク側板内面への押付
力を増大させれば摩擦力が大きくなり、液位変動
でシール材ｆが上下動するときにシール材ｆが摩
耗するので、従来では押付力を小さくして摩擦力
を小さくしていることからも、単にシール機能し
か有していないことが明らかである。
As shown in Figure 1, a floating roof type oil tank has a floating roof c floating above the liquid level of crude oil etc. A tube d and a sealing material f made by putting an elastic material e such as urethane inside the tube d to give elasticity as a whole are attached, and the sealing material f is used to connect the outer circumferential surface of the floating roof c and the inner circumferential surface of the tank side plate. It is designed to be able to move up and down in accordance with fluctuations in the liquid level of crude oil, etc. b, while sealing it, and to prevent crude oil, volatile gas, etc. b from leaking to the outside. The reason why the tube d on the surface of the sealing material f is made of rubber is because if the tube d were made of metal, the tank side plate would be damaged when the floating roof c swings due to fluctuations in the liquid level during an earthquake. This is to prevent the possibility of ignition due to friction with the inner surface, which could lead to a fire. By pressing the surface of the elastic sealing material f against the inner surface of the tank side plate, liquid and volatile gas can flow out. It is only designed to prevent the floating roof from swinging, but does not have the function of suppressing the swinging of the floating roof. This means that when the frictional force is F, the friction coefficient is μ, and the pressing force is, there is a relationship of frictional force F = μ, and if the pressing force of the sealing material f against the inner surface of the tank side plate is increased, the frictional force will be increased. When the sealing material f moves up and down due to liquid level fluctuations, the sealing material f wears out, so in the past, the pressing force was reduced to reduce the frictional force, so it only had a sealing function. It is clear that there is no.
このように従来の浮屋根のシール材ｆには、浮
屋根のスロツシングを抑制する機能が全くないた
め、地震が発生してタンクａ内の原油等が動揺し
始めると、液面の揺動に伴ない浮屋根ｃも無制限
に揺動する。この浮屋根の揺動（上下変位）によ
りタンク上部構造物を破損したり、衝突による出
火の可能性もあつた。又、従来の浮屋根スロツシ
ングを抑制できないことから、浮屋根スロツシン
グ時に液が溢流しないようにするため、タンクを
深くして液の溢流を防止するようにしていた。し
かし、予想外の大きな地震が生じたときは、溢流
の危険性があつた。 In this way, the conventional sealing material f for floating roofs has no function to suppress sloshing of the floating roof, so when an earthquake occurs and the crude oil, etc. in tank a starts to fluctuate, the liquid level fluctuates. The accompanying floating roof c also swings without limit. This swinging (vertical displacement) of the floating roof could have caused damage to the upper structure of the tank, and there was also the possibility of a fire starting due to the collision. Furthermore, since conventional floating roof sloshing cannot be suppressed, the tank has been made deep to prevent the liquid from overflowing during floating roof sloshing. However, in the event of an unexpectedly large earthquake, there was a risk of overflow.
本発明者は、浮屋根式油タンクのスロツシング
を抑制することについて種々研究を重ねた結果、
浮屋根式油タンクのスロツシング応答を支配する
減衰の大部分がシール部の摩擦に依存することを
実験的、理論的に確認した。 As a result of various studies on suppressing sloshing in floating roof oil tanks, the inventor has found that:
It was experimentally and theoretically confirmed that most of the damping that governs the sloshing response of floating roof oil tanks depends on the friction of the seal.
すなわち、浮屋根外周のシール材とタンク側板
内面との摩擦がスロツシング応答にどのような影
響を与えるかについて検討するに際し、スロツシ
ング時、浮屋根シール材とタンク側板との摩擦に
よる減衰効果を、等価減衰定数heとして評価し、
シール材とタンク側板内面との摩擦力に、揺動に
伴なう浮屋根の揺動行程（ストローク）を乗じて
摩擦仕事（摩擦により逸散するエネルギー）Ef
を求め、内容液のスロツシング運動エネルギー
KEと比較することにより上記heを求める。 In other words, when considering how the friction between the sealing material around the outer circumference of the floating roof and the inner surface of the tank side plate affects the sloshing response, the damping effect due to the friction between the floating roof sealing material and the tank side plate during sloshing is equivalently Evaluated as the damping constant he,
Frictional work (energy dissipated by friction) is calculated by multiplying the frictional force between the sealing material and the inner surface of the tank side plate by the rocking stroke (stroke) of the floating roof due to rocking.
Find the slotting kinetic energy of the liquid content
Determine the above he by comparing it with K E.
上記スロツシング時にシール材とタンク側板内
面との摩擦により逸散するエネルギーEfは、
(イ) シール材（ウレタンフオーム）の圧縮反発力
を、浮屋根揺動時一定とする。すなわち、シー
ル材とタンク側板内面との全摩擦力を一定とす
る。 The energy Ef dissipated due to the friction between the seal material and the inner surface of the tank side plate during the above sloshing is as follows: (a) The compressive repulsive force of the seal material (urethane foam) is constant when the floating roof swings. That is, the total frictional force between the sealing material and the inner surface of the tank side plate is made constant.
(ロ) スロツシング時、浮屋根デツキが平面を保持
する。(b) The floating roof deck maintains the flat surface during slotting.
の条件を仮定すると、１周期分に対し次式で与
えられる。Assuming the conditions, it is given by the following equation for one period.
μ：シール材とタンク側板内面との摩擦係数
ηn：スロツシング最大波高（ｍ）
：シール材のタンク側板内面に対する押付力
（単位周長当り）（Kg／ｍ）
Ｒ：タンク内半径
：円周角
＝lP
ｌ：シール材とタンク側板内面の接触幅（ｍ）
Ｐ：シール材（ウレタンフオーム）の反発力に
よるシール材とタンク側板内面の接触面圧（Kg／
m2）
次に、内溶液が１次モードのスロツシングを起
こす場合の運動エネルギーKEは、次の条件を仮
定すると、式で与えられる。 μ: Coefficient of friction between the sealing material and the inner surface of the tank side plate η n : Maximum sloshing wave height (m): Pressing force of the sealing material against the inner surface of the tank side plate (per unit circumference) (Kg/m) R: Tank inner radius: Circumference Angle = lP l: Contact width between the sealing material and the inner surface of the tank side plate (m) P: Contact surface pressure between the sealing material and the inner surface of the tank side plate due to the repulsive force of the sealing material (urethane foam) (Kg/
m 2 ) Next, the kinetic energy K E when the internal solution causes first-order mode sloshing is given by the formula assuming the following conditions.
条 件
(ハ) 浮屋根構造を剛とし、浮屋根の質量は液質量
に比べて十分小さいものとする。Condition (c) The floating roof structure shall be rigid, and the mass of the floating roof shall be sufficiently small compared to the mass of the liquid.
(ニ) スロツシング振動系をバネ・マスモデルに置
換し、浮屋根の周辺部とタンク底部とをスロツ
シング重力ばねでつなぐ。(d) Replace the sloshing vibration system with a spring/mass model, and connect the periphery of the floating roof and the bottom of the tank with a sloshing gravity spring.
KE＝１／２・2mvR′2・（η〓／R′）2＝mvη〓2
mv：スロツシング有効質量（Kgｆ・s2／ｍ）
η〓：質量mvの鉛直速度（タンク側板に沿う液面
の速度）（ｍ／ｓ）
R′：質量mvの等価半径（ｍ）
特にスロツシング応答が正弦波状の場合
KE＝mv（ω1ηn）2
ω1：１次円振動数（１／sec）
ηn：最大振幅（最大応答波高（ｍ））
又、ｇ：重力加速度（9.8ｍ／s2）
Ｈ：液面高さ（ｍ）
浮屋根シール材とタンク側板内面との摩擦によ
る等価減衰係数heは、
he＝１／2π・Ef／2KE
で与えられるので、これに、式を代入する
と、
he＝4μＲ／πmvω1 2ηn
となる。 K E = 1/2・2m v R′ 2・(η〓/R′) 2 = m v η〓 2 m v : Sloshing effective mass (Kgf・s 2 /m) η〓: Vertical velocity of mass m v (Velocity of liquid surface along tank side plate) (m/s) R': Equivalent radius of mass m v (m) Especially when the sloshing response is sinusoidal, K E = m v (ω 1 η n ) 2 ω 1 : Primary circular frequency (1/sec) η n : Maximum amplitude (maximum response wave height (m)) g: Gravitational acceleration (9.8 m/s 2 ) H: Liquid level height (m) Equivalent damping coefficient due to friction between the floating roof sealing material and the inner surface of the tank side plate Since he is given by he=1/2π·Ef/2K E , substituting the formula into this gives he=4μR/πm v ω 1 2 η n .
この式から等価減衰係数heは、摩擦係数μ
及び押付力に比例することがわかり、摩擦係
数、押付力を大きくして等価減衰係数heを大き
くすれば、スロツシングを小さくするとができ
る。 From this formula, the equivalent damping coefficient he is calculated as the friction coefficient μ
It has been found that sloshing is proportional to the pressing force, and if the friction coefficient and pressing force are increased and the equivalent damping coefficient he is increased, sloshing can be reduced.
本発明は、上記の理論に基づきタンク内の液が
地震により動揺したとき波高が大きくなるまでに
減衰力を増大させることを狙いとし、地震発生時
に浮屋根外周部をタンク側板に押し付けるように
して浮屋根とタンク側板との摩擦力を増大させ、
浮屋根の揺動を抑制して前記従来の問題を解消す
ることを目的とする。
Based on the above theory, the present invention aims to increase the damping force by the time the wave height increases when the liquid in the tank is shaken by an earthquake. Increasing the frictional force between the floating roof and the tank side plate,
It is an object of the present invention to suppress the swinging of a floating roof and solve the above-mentioned conventional problems.
本発明は、上記目的を達成するため、従来と同
様に浮屋根の外周にシール材を配して支持させ該
シール材でタンク内の液や揮発ガスが外部へ流出
するのを防止できるようにした構成において、浮
屋根の周辺部上面に、多数の流体圧伸縮装置を半
径方向外方へ向けて配設し、各伸縮装置の先端に
は不燃性高摩擦材料（ノンスパーク材）を取り付
けてタンク側板の内面に該不燃性高摩擦材料が押
し付けられることにより摩擦力が増大して浮屋根
の揺動が減衰されるようにし、且つ上記各伸縮装
置には流体ポンプを配管を介して接続し、地震発
生時には、地表面の水平加速度、原油等の動揺に
伴なう浮屋根の揺動による傾斜量とか浮屋根の鉛
直方向の揺動速度等の検出信号に基づき流体ポン
プを自動的に起動させ、各伸縮装置を伸長させて
先端の不燃性高摩擦材料をタンク側板に押し付
け、スロツシングが成長する以前に浮屋根のスロ
ツシングを抑制させるよう構成する。
In order to achieve the above object, the present invention has a structure in which a sealing material is disposed around the outer periphery of the floating roof to support it, and the sealing material can prevent the liquid and volatile gas inside the tank from flowing out to the outside. In this configuration, a large number of fluid pressure expansion and contraction devices are arranged radially outward on the upper surface of the periphery of the floating roof, and a non-flammable high friction material (non-spark material) is attached to the tip of each expansion and contraction device. The non-combustible high-friction material is pressed against the inner surface of the tank side plate to increase frictional force and attenuate the swinging of the floating roof, and a fluid pump is connected to each of the expansion and contraction devices via piping. In the event of an earthquake, the fluid pump is automatically started based on detection signals such as the horizontal acceleration of the ground surface, the amount of inclination due to the shaking of the floating roof due to the movement of oil, etc., and the vertical swing speed of the floating roof. The structure is such that each telescopic device is extended to press the non-combustible high friction material at the tip against the tank side plate, thereby suppressing sloshing of the floating roof before sloshing grows.
次に、本発明の装置の実施例を図面を参照して
説明する。 Next, embodiments of the apparatus of the present invention will be described with reference to the drawings.
実施例 １
第３図乃至第５図は本発明の一実施例を示すも
ので、平底円筒型油タンク１の原油等２の液面上
に浮かせる浮屋根３の外周に、リング状にしたゴ
ム製のチユーブ５内にウレタンフオームの如き弾
性体６を収納してなる弾性を有するシール材４を
支持させ、該シール材４により浮屋根３とタンク
側板７の内面との間をシールするようにした浮屋
根式油タンクにおいて、浮屋根３の周辺部上面
に、ロツド９先端に不燃性高摩擦材料（ノンスパ
ーク材）（たとえば、アスベスト、硬質ゴム等）
１０を取り付けた油圧ジヤツキ８を、第２図の如
く円周方向の多数個所に半径方向外方へ向けて放
射状に設置し、上記各油圧ジヤツキ８を、浮屋根
３上に設置した油ポンプ１１に配管１２を介して
接続し、該油ポンプ１１への油として油タンク１
内の油を配管１３を介して用いるようにするか、
あるいは外部に設置する予備タンクの油を使用す
るようにする。上記浮屋根３の周辺部には、原油
等２が動揺して液面が揺動することにより生ずる
浮屋根３の鉛直方向の揺動速度を検出する速度計
１４を設けると共に、タンク建設部の地上には、
地震発生時に地震による地表面の水平加速度を測
定する加速度計１５を設置し、上記速度計１４と
加速度計１５からの信号が或るレベルに達すると
油ポンプ１１を起動させるレベルスイツチ１６を
設け、該レベルスイツチ１６の作動により油ポン
プ１１に起動信号が発せられて油ポンプ１１が運
動されるようにする。
Embodiment 1 Figures 3 to 5 show an embodiment of the present invention, in which a ring-shaped rubber ring is attached to the outer periphery of a floating roof 3 that floats on the liquid surface of crude oil, etc. 2 in a flat-bottomed cylindrical oil tank 1. An elastic sealing material 4 made of an elastic body 6 such as urethane foam is supported in a tube 5 made of aluminum, and the sealing material 4 seals between the floating roof 3 and the inner surface of the tank side plate 7. In the floating roof type oil tank, a non-combustible high friction material (non-sparking material) (e.g. asbestos, hard rubber, etc.) is attached to the tip of the rod 9 on the upper surface of the periphery of the floating roof 3.
10 are installed radially outward in the circumferential direction at multiple locations in the circumferential direction as shown in FIG. The oil tank 1 is connected to the oil pump 11 via a pipe 12, and the oil tank 1 is connected to the oil tank 1 as oil to the oil pump 11.
Either use the oil inside through the pipe 13, or
Alternatively, use oil from a reserve tank installed outside. A speedometer 14 is installed around the floating roof 3 to detect the vertical swing speed of the floating roof 3, which is caused by the fluctuation of the crude oil etc. 2 and the fluctuation of the liquid level. On the ground,
An accelerometer 15 is installed to measure the horizontal acceleration of the ground surface caused by an earthquake when an earthquake occurs, and a level switch 16 is installed to start the oil pump 11 when the signals from the speedometer 14 and the accelerometer 15 reach a certain level, The actuation of the level switch 16 causes a start signal to be issued to the oil pump 11, causing the oil pump 11 to move.
地震による変位振幅は、地震発生時は小さい振
幅であるが一定時間後に大きな振幅となる。本発
明では、振幅が大きくならない一定時間を狙つて
油ポンプ１１を起動させようとするもので、地震
発生初期に地表面の微振動振幅の加速度が加速度
計１５で検出されると共に、実際の液面の揺動に
伴なう浮屋根３の鉛直方向の揺動速度が速度計１
４で計測されており、いずれかの計測装置からの
信号が或るレベルを超えると直ちに油ポンプ１１
が起動させられる。油ポンプ１１が起動すると、
圧油を油圧ジヤツキ８に圧入してロツド９を伸長
させ、該ロツド９の先端の不燃性高摩擦材料１０
をタンク側板７の内面へ押圧させる。これにより
浮屋根３とタンク側板７との間に大きな摩擦力が
働き、前記理論の如く減衰定数が大きくなる。し
たがつて、浮屋根３は地震後短時間のうちに揺動
が拘束され、スロツシングが制御される。 The displacement amplitude due to an earthquake is small at the time of the earthquake, but becomes large after a certain period of time. In the present invention, the oil pump 11 is started at a certain time during which the amplitude does not become large.At the beginning of an earthquake, the acceleration of the vibration amplitude on the ground surface is detected by the accelerometer 15, and the actual The vertical swing speed of the floating roof 3 due to the swing of the surface is measured by the speedometer 1.
4, and as soon as the signal from any measuring device exceeds a certain level, the oil pump 11
is activated. When the oil pump 11 starts,
Pressurized oil is injected into the hydraulic jack 8 to extend the rod 9, and the non-flammable high friction material 10 at the tip of the rod 9 is
is pressed against the inner surface of the tank side plate 7. As a result, a large frictional force acts between the floating roof 3 and the tank side plate 7, and the damping constant increases as in the theory described above. Therefore, the floating roof 3 is restrained from swinging within a short time after the earthquake, and sloshing is controlled.
上記において、２つの検出信号を入力させるよ
うにしているのは、加速度信号が小さい場合でも
浮屋根３の揺動が大きい場合があるからである。
すなわち、スロツシングを引き起こす長周期地震
動の場合、地表面加速度が小さいこともあり、加
速度の小さい地震力でもスロツシングが大きい場
合があるため、現実の浮屋根揺動速度もデータと
してとり込み、より確実にスロツシング抑制が行
われるようにしてある。 In the above, the reason why two detection signals are input is that even when the acceleration signal is small, the swinging of the floating roof 3 may be large.
In other words, in the case of long-period earthquake motions that cause sloshing, the ground surface acceleration may be small, and even seismic forces with small accelerations may cause large sloshing. Therefore, the actual floating roof rocking velocity should also be included as data to more accurately Sloshing is suppressed.
実施例 ２
実施例１では、油ポンプ１１の起動用のデータ
を、地表面の水平加速度と、浮屋根の鉛直方向速
度によつた場合を示したが、浮屋根３の傾斜によ
る隙間量とか、浮屋根３に水を入れた容器を載
せ、浮屋根３が傾斜するときに生ずる水のヘツド
差を差圧計で測定して得られる傾斜量をデータと
して取り込むようにしても実施できる。Example 2 In Example 1, the data for starting the oil pump 11 was based on the horizontal acceleration of the ground surface and the vertical velocity of the floating roof. It can also be implemented by placing a container filled with water on the floating roof 3, measuring the head difference of water that occurs when the floating roof 3 is tilted with a differential pressure gauge, and taking in the amount of tilt obtained as data.
実施例 ３
油ポンプ１１と油圧ジヤツキ８とを接続させる
以外に、他の流体ポンプを使用し、又、不燃性高
摩擦材料１０をタンク側板７に押し付けるものと
しては油圧ジヤツキでなくてもよい。Embodiment 3 In addition to connecting the oil pump 11 and the hydraulic jack 8, another fluid pump may be used, and the device for pressing the non-flammable high friction material 10 against the tank side plate 7 may not be a hydraulic jack.
以上述べた如く、本発明の装置によれば、地震
発生時に浮屋根外周部からタンク側板に向つて高
摩擦材料を押し付けるようにしているので、地震
発生後、短時間のうちにまだスロツシングが成長
する以前に浮屋根の揺動を抑制することができ、
タンクの上部構造物を破損したり、衝突により出
火するというおそれをなくし得る、という優れた
効果を奏し得る。
As described above, according to the device of the present invention, when an earthquake occurs, the high-friction material is pressed from the outer periphery of the floating roof toward the tank side plate, so sloshing still grows within a short time after the earthquake occurs. It is possible to suppress the shaking of the floating roof before
This has the excellent effect of eliminating the risk of damaging the upper structure of the tank or causing a fire due to a collision.
第１図は従来の浮屋根式油タンクの概略図、第
２図は第１図の部の拡大図、第３図は本発明の
一実施例を示す概略図、第４図は第３図の平面
図、第５図は第３図の部の拡大図である。
１は油タンク、２は原油等、３は浮屋根、４は
シール材、７はタンク側板、８は油圧ジヤツキ、
１０は不燃性高摩擦材料、１１は油ポンプ、１４
は速度計、１５は加速度計を示す。
Fig. 1 is a schematic diagram of a conventional floating roof type oil tank, Fig. 2 is an enlarged view of the part shown in Fig. 1, Fig. 3 is a schematic diagram showing an embodiment of the present invention, and Fig. 4 is a schematic diagram of the part shown in Fig. 3. FIG. 5 is an enlarged view of the portion shown in FIG. 3. 1 is an oil tank, 2 is crude oil, etc., 3 is a floating roof, 4 is a sealing material, 7 is a tank side plate, 8 is a hydraulic jack,
10 is a non-flammable high friction material, 11 is an oil pump, 14
15 indicates a speedometer, and 15 indicates an accelerometer.
Claims (1)
材で浮屋根外周とタンク側板間をシールするよう
にしてある浮屋根式油タンクにおける上記浮屋根
上に、先端に高摩擦材料を取り付けた伸縮装置を
半径方向外方へ向けて放射状に多数取り付け、且
つ地震による地表面や浮屋根の揺動を検出する装
置を備え、該検出装置からの信号に基づき上記伸
縮装置を伸長させる作動装置を浮屋根上に設置し
たことを特徴とする油タンクの浮屋根揺動抑制装
置。1. A floating roof type oil tank in which a sealing material is supported on the outer periphery of the floating roof, and the sealing material is used to seal between the outer periphery of the floating roof and the side plate of the tank. A large number of devices are installed radially outward in the radial direction, and a device is provided to detect the shaking of the ground surface or floating roof caused by an earthquake, and an actuating device that extends the above-mentioned telescoping device based on a signal from the detection device is installed on the floating roof. A floating roof rocking suppression device for an oil tank, characterized in that it is installed on the roof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58249206A JPS60148489A (en) | 1983-12-29 | 1983-12-29 | Inhibiting device for rocking of floating roof of oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58249206A JPS60148489A (en) | 1983-12-29 | 1983-12-29 | Inhibiting device for rocking of floating roof of oil tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60148489A JPS60148489A (en) | 1985-08-05 |
| JPH0139951B2 true JPH0139951B2 (en) | 1989-08-24 |
Family
ID=17189489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58249206A Granted JPS60148489A (en) | 1983-12-29 | 1983-12-29 | Inhibiting device for rocking of floating roof of oil tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60148489A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61119985U (en) * | 1985-01-10 | 1986-07-29 | ||
| JP2006315717A (en) * | 2005-05-12 | 2006-11-24 | Shimizu Corp | Floating roof swing suppression device |
| JP2007261650A (en) * | 2006-03-29 | 2007-10-11 | Chubu Electric Power Co Inc | Damping device for floating roof tank |
-
1983
- 1983-12-29 JP JP58249206A patent/JPS60148489A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60148489A (en) | 1985-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5916045B2 (en) | Rotating bumper fender | |
| CN216589735U (en) | Flexible resonance liquid damper for wind turbine unit | |
| US4206717A (en) | Mooring apparatus | |
| JPH0139951B2 (en) | ||
| JPH026713B2 (en) | ||
| CN115042929A (en) | An offshore self-stabilizing floating platform | |
| JPH06345184A (en) | Tank with device for suppressing liquid fluctuation | |
| JP2008213886A (en) | Floating roof liquid storage tank | |
| JP2008273566A (en) | Sloshing inhibiting apparatus of floating roof tank | |
| JP2002121929A (en) | Three-dimensional floating body base isolation method provided with air cushion and floating body base isolation structure | |
| US1906685A (en) | Storage tank for volatile gases and liquids | |
| JPS597264Y2 (en) | Liquid level fluctuation prevention device for liquid storage tank | |
| JP4523821B2 (en) | Structure of floating roof penetration | |
| JPH01260138A (en) | Earthquake resisting machine | |
| JPS6257558B2 (en) | ||
| CN214531143U (en) | High pressure grease isolation bearing | |
| JPS5938150B2 (en) | Floating roof balancing device for tank earthquake resistance | |
| CN109779369B (en) | Three-direction six-degree-of-freedom shock isolation and absorption device and working method thereof | |
| JPH0694072A (en) | U-shaped type damping tank | |
| JP2005083018A (en) | Floating seismic isolation structure | |
| JP2008254804A (en) | Vibration suppressing device for floating roof | |
| JP2006315717A (en) | Floating roof swing suppression device | |
| JPH0237860Y2 (en) | ||
| JPS6317711B2 (en) | ||
| CN221419449U (en) | Steel lining tetrafluoro storage tank with more durable storage tank pipe orifice |