JP2762233B2 - Automatic filling method of powder thermal insulation into liquefied gas storage tank - Google Patents
Automatic filling method of powder thermal insulation into liquefied gas storage tankInfo
- Publication number
- JP2762233B2 JP2762233B2 JP6150758A JP15075894A JP2762233B2 JP 2762233 B2 JP2762233 B2 JP 2762233B2 JP 6150758 A JP6150758 A JP 6150758A JP 15075894 A JP15075894 A JP 15075894A JP 2762233 B2 JP2762233 B2 JP 2762233B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating material
- powder
- powder heat
- filling
- 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
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Thermal Insulation (AREA)
- Basic Packing Technique (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、液化ガス貯蔵タンクや
液化ガス輸送用タンクローリの液化ガス貯蔵タンク等、
粉末真空断熱を行っている大型液化ガス貯蔵槽への粉末
断熱材の充填方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas storage tank,
The present invention relates to a method for filling a large-sized liquefied gas storage tank with powder vacuum insulation with a powder insulation material.
【0002】[0002]
【従来技術】タンクローリの液化ガス貯蔵槽や液化ガス
貯蔵タンク等の大型断熱貯槽では、液化ガスを貯溜する
内槽の外周を外槽で覆い、内外槽間の空間にパーライト
等の粉末断熱材を充填するとともに、この内外槽間の空
間を真空状態に維持した粉末真空断熱方式を採用してい
る。この場合、粉末断熱材の充填が不適当であると、断
熱不良や霜付の原因となる。また、パーライトの場合に
は、充填密度が断熱性能に影響を与え、充填空間容積の
約2倍の容量を充填した場合に良好な断熱性能が得られ
ることが知られている。2. Description of the Related Art In a large-diameter insulated storage tank such as a liquefied gas storage tank or a liquefied gas storage tank of a tank truck, the outer periphery of an inner tank for storing liquefied gas is covered with an outer tank, and a space between the inner and outer tanks is provided with a powder heat insulating material such as perlite. A vacuum vacuum insulation system is used in which the space between the inner and outer tanks is filled and a vacuum state is maintained. In this case, improper filling of the powder heat insulating material causes poor heat insulation and frost. Further, in the case of perlite, it is known that the packing density affects the heat insulating performance, and good heat insulating performance can be obtained when a capacity of about twice the volume of the filling space is filled.
【0003】従来、大型の断熱貯槽に粉末断熱材を充填
する場合、貯槽を振動台に載せたり、貯槽外面にバイブ
レータを取り付けたりして、粉末断熱材に振動を与えな
がら均等になるように充填していた。そしてこの場合、
粉末断熱材の供給系に配置されている充填弁の開閉操作
を人力で行っていた。Conventionally, when filling a large heat insulating storage tank with powdered heat insulating material, the storage tank is placed on a vibrating table or a vibrator is attached to the outer surface of the storage tank so that the powdered heat insulating material is uniformly filled while being vibrated. Was. And in this case,
The opening / closing operation of the filling valve arranged in the supply system of the powder heat insulating material was manually performed.
【0004】[0004]
【発明が解決しようとする課題】貯槽を振動台に載せた
り、貯槽外面にバイブレータを取り付けたりして振動を
与えるようにしていた従来の充填方法では、振動に伴い
騒音が発生するという問題があるうえ、振動が構造部品
に悪影響を及ぼすという問題があった。また、貯槽を立
てた場合には高さ数十メートルという高所で、充填弁の
開閉作業を行うことになり作業性が悪いという問題もあ
った。本発明は、このような点に着目して、振動を加え
ることなく、充填空間内に粉末断熱材を均等に充填する
方法を提供することを目的とする。The conventional filling method, in which the storage tank is placed on a vibrating table or a vibrator is attached to the outer surface of the storage tank to apply vibration, has a problem that noise is generated due to the vibration. In addition, there is a problem that the vibration adversely affects the structural components. In addition, when the storage tank is set up, the filling valve is opened and closed at a height of several tens of meters, which causes a problem of poor workability. It is an object of the present invention to provide a method of filling the filling space evenly with the powder heat insulating material without applying vibrations, focusing on such points.
【0005】[0005]
【課題を解決するための手段】上述の目的を達成するた
めに本発明は、内外二重槽で形成した貯槽の内外槽間の
空間を真空ポンプに連通接続し、槽間空間と粉末断熱材
貯蔵容器とを粉末断熱材供給路で連通接続するととも
に、槽間空間に加圧ガス貯溜容器を加圧ガス供給路で接
続し、粉末断熱供給路に粉末断熱材充填弁と粉末断熱材
の流動を検知する光電管装置とを配置し、加圧ガス供給
路にガス加圧弁を配置し、粉末断熱材充填弁を一定時間
開弁して粉末断熱材を真空引きされている槽間空間に一
定時間供給する粉末断熱材充填工程と、この粉末断熱充
填工程の終了後にガス加圧弁を一定時間開弁して加圧ガ
ス貯溜容器に貯蔵されている乾燥ガスを真空引きされて
いる槽間空間に供給する粉末断熱材加圧工程とを所定回
数繰り返すようにし、粉末断熱材充填工程で粉末断熱材
供給路に配置した光電管装置が粉末断熱材の流動停止を
検出した際には粉末断熱材充填弁を閉弁するとともに異
常状態であることを報知するように構成したことを特徴
としている。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a storage tank formed by an inner / outer double tank, wherein the space between the inner and outer tanks is connected to a vacuum pump, and the space between the tanks and the powder heat insulating material are connected. The storage container is connected in communication with the powder heat insulating material supply path, the pressurized gas storage container is connected to the space between the tanks by the pressurized gas supply path, and the powder heat insulation material filling valve and the powder heat insulation material are connected to the powder heat insulation supply path.
A photo-tube device that detects the flow of air is arranged, a gas pressurizing valve is arranged in the pressurized gas supply path, and the powder heat insulating material filling valve is opened for a certain period of time, so that the powder heat insulating material is evacuated to the space between the tanks. A powder heat insulating material filling step for supplying for a certain time, and a space between the tanks in which the dry gas stored in the pressurized gas storage container is evacuated by opening a gas pressurizing valve for a certain time after the completion of the powder heat insulating filling step. a powder heat insulator pressure feeding to repeat a predetermined number of times, the powder heat insulator in powder insulation material filling step
A phototube device placed in the supply path stops the flow of the powder insulation.
When detected, close the powder insulation material filling valve and
It is configured to notify that it is in a normal state .
【0006】[0006]
【作用】本発明では、粉末断熱材供給路に配置した粉末
断熱材充填弁を一定時間開弁することにより粉末断熱材
を粉末断熱材貯蔵容器から槽間空間に圧力差で移送す
る。次いで加圧ガス供給路に配置したガス加圧弁を一定
時間開弁することにより加圧ガス貯溜容器内の乾燥ガス
を槽間空間に供給することにより、槽間空間に送り込ま
れた粉末断熱材の架橋部分及び粉末断熱材内の空隙をガ
ス圧力で押し潰す。粉末断熱材の供給と加圧ガスの供給
とを交互に数回繰り返すことにより、槽間空間内に粉末
断熱材を均等に充填する。また、粉末断熱材供給路には
粉末断熱材の流動を検知する光電管装置が配置してある
ことから、粉末断熱材貯蔵容器での粉末断熱材がなくな
り、あるいは、粉末断熱材供給路内での閉塞が生じて粉
末断熱材供給路内を粉末断熱材が流れていないことを光
電管装置での検知すると、異常状態であると判断して異
常報知をすることになる。 According to the present invention, the powder heat insulating material is transferred from the powder heat insulating material storage container to the space between the tanks by opening the powder heat insulating material filling valve disposed in the powder heat insulating material supply path for a certain period of time. Then, by opening the gas pressurizing valve arranged in the pressurized gas supply path for a certain period of time to supply the dry gas in the pressurized gas storage container to the space between the tanks, the powder heat insulating material fed into the space between the tanks is discharged. The bridge and the voids in the powder insulation are crushed by gas pressure. By alternately repeating the supply of the powder heat insulating material and the supply of the pressurized gas several times, the space between the tanks is evenly filled with the powder heat insulating material. In addition, the powder insulation material supply path
There is a phototube device that detects the flow of powder insulation
As a result, there is no powder insulation in the powder insulation storage container.
Or blockage in the powder insulation supply channel
Light indicates that powder heat insulation is not flowing through the heat insulation supply path.
If detected by the tube device, it is determined that the
You will always be informed.
【0007】[0007]
【実施例】図1は液化ガス貯蔵槽への粉末断熱材充填装
置の系統図である。この粉末断熱材貯蔵装置は、内槽
(1)と外槽(2)とで二重槽構造に形成した液化ガス貯蔵
槽(3)と、この液化ガス貯蔵槽(3)の内外槽間の槽間空
間(4)内に充填するパーライト(粉末断熱材)を貯蔵して
いる粉末断熱材貯蔵容器(5)と、槽間空間(4)に供給す
る加圧用ガスを貯蔵する加圧ガス貯溜容器(6)と、加圧
ガス貯溜容器(6)に加圧用ガスを供給する加圧用ガス発
生装置(7)と、液化ガス貯蔵槽(3)の槽間空間(4)に連
通接続された真空ポンプ(8)とからなり、粉末断熱貯蔵
容器(5)と液化ガス貯蔵槽(3)の槽間空間(4)とを粉末
断熱材供給路(9)で連通接続し、加圧ガス貯溜容器(6)
と液化ガス貯蔵槽(3)の槽間空間(4)とを加圧ガス供給
路(10)とで連通接続し、加圧用ガス発生装置(7)と加圧
ガス貯溜容器(6)とをガス補給路(11)で連通接続してあ
る。1 is a system diagram of a device for filling a liquefied gas storage tank with a powder heat insulating material. This powder insulation material storage device has an inner tank
A liquefied gas storage tank (3) formed into a double tank structure by (1) and an outer tank (2), and a space (4) between the inner and outer tanks of the liquefied gas storage tank (3) is filled. A powder heat insulating material storage container (5) for storing perlite (powder heat insulating material), a pressurized gas storage container (6) for storing a pressurizing gas to be supplied to the inter-chamber space (4), and a pressurized gas storage A pressurizing gas generator (7) for supplying a pressurizing gas to the container (6); and a vacuum pump (8) connected to the inter-chamber space (4) of the liquefied gas storage tank (3). The insulated storage container (5) and the inter-chamber space (4) of the liquefied gas storage tank (3) are connected to each other through a powder heat insulating material supply path (9), and the pressurized gas storage container (6) is connected.
And a space (4) between tanks of the liquefied gas storage tank (3) are connected to each other through a pressurized gas supply path (10), and a pressurized gas generator (7) and a pressurized gas storage container (6) are connected. They are connected by a gas supply path (11).
【0008】そして、粉末断熱材供給路(9)にはガス圧
作動式の粉末断熱材充填弁(12)が配置してあり、加圧ガ
ス供給路(10)にはガス圧作動式のガス加圧弁(13)が配置
してある。両ガス圧作動弁(12)(13)にはガス補給路(11)
から分岐導出した作動ガス通路(14)(15)がそれぞれ接続
してあり、各作動ガス通路(14)(15)に三方電磁弁(16)(1
7)がそれぞれ配置してある。また、ガス補給路(11)に
は、加圧ガス補給元弁(18)と電磁弁(19)が配置してあ
る。A gas pressure-operated powder heat-insulating material filling valve (12) is arranged in the powder heat-insulating material supply passage (9), and a gas pressure-actuated gas is supplied to the pressurized gas supply passage (10). A pressure valve (13) is arranged. Gas supply path (11) for both gas pressure operated valves (12) (13)
The working gas passages (14) and (15), which are branched out from the, are connected to each other, and the three-way solenoid valves (16) and (1) are connected to the respective working gas passages (14) and (15).
7) are arranged respectively. Further, a pressurized gas supply source valve (18) and a solenoid valve (19) are arranged in the gas supply path (11).
【0009】加圧用ガス発生装置(7)は、液体窒素貯蔵
容器(20)と、液体窒素貯蔵容器(20)から導出した液体窒
素を気化させる気化器(21)と、気化器(21)の導出路に配
置した開閉弁(22)及び減圧弁(23)とで構成してある。The pressurizing gas generator (7) includes a liquid nitrogen storage container (20), a vaporizer (21) for vaporizing liquid nitrogen derived from the liquid nitrogen storage container (20), and a vaporizer (21). It comprises an on-off valve (22) and a pressure reducing valve (23) arranged on the outlet path.
【0010】また、加圧用ガス発生装置(7)から粉末断
熱材貯蔵容器(5)にガス注入路(24)が配管してあり、こ
のガス注入路(24)には電磁弁(25)が配置してある。そし
て、この電磁弁(25)は粉末断熱材貯蔵容器(5)の内圧を
検知して作動する圧力スイッチ(26)の圧力検知に基づき
電磁弁(25)を開閉操作して粉末断熱材貯蔵容器(5)内を
わずかな正圧(例えばゲージ圧0.2Kg/cm2)に維持する
ようにしてある。つまり、この電磁弁(25)と圧力スイッ
チ(26)とで圧力制御ユニット(27)を構成している。A gas injection path (24) is provided from the pressurizing gas generator (7) to the powder heat insulating material storage container (5), and an electromagnetic valve (25) is provided in the gas injection path (24). It is arranged. The solenoid valve (25) operates to open and close the solenoid valve (25) based on the pressure detection of a pressure switch (26) that operates by detecting the internal pressure of the powder heat insulator storage container (5). The inside of (5) is maintained at a slight positive pressure (for example, a gauge pressure of 0.2 kg / cm 2 ). That is, the solenoid valve (25) and the pressure switch (26) constitute a pressure control unit (27).
【0011】図中符号(28)は液化ガス貯蔵槽(3)での槽
間空間(4)の圧力を検知して信号を発信する圧力発信
機、(29)は加圧ガス貯溜容器(6)の内圧を検知して信号
を発信する圧力発信機、(30)は加圧ガス貯溜容器(6)の
内圧を表示する圧力計、(31)は粉末断熱材供給路(9)の
粉末断熱材の流れを検知する光電管装置(パーライトセ
ンサー)である。In the figure, reference numeral (28) denotes a pressure transmitter for detecting the pressure of the inter-chamber space (4) in the liquefied gas storage tank (3) and transmitting a signal, and (29) denotes a pressurized gas storage container (6). ) Is a pressure transmitter that detects the internal pressure and transmits a signal, (30) is a pressure gauge that indicates the internal pressure of the pressurized gas storage container (6), and (31) is the powder insulation of the powder insulation supply path (9). It is a photoelectric tube device (pearlite sensor) that detects the flow of material.
【0012】次に、上述の構成からなる粉末断熱材貯蔵
装置を使用しての粉末断熱材充填手順を述べる。この充
填手順は図2に示すように運転開始処理(A)、パーライ
ト充填処理(B)、パーライト加圧処理(C)、運転終了処
理(D)からなるメインの処理手順と、このメインの処理
手順と平行して作動する加圧ガス補給処理(E)、及びメ
インの処理手順におけるパーライト充填処理時での異常
時に作動するパーライト供給系異常処理(F)とで構成さ
れている。Next, a procedure for filling the powder heat insulating material using the powder heat insulating material storage device having the above-described configuration will be described. As shown in FIG. 2, the filling procedure includes a main processing procedure including an operation start processing (A), a pearlite filling processing (B), a pearlite pressurization processing (C), and an operation end processing (D). The process comprises a pressurized gas supply process (E) that operates in parallel with the procedure, and a pearlite supply system abnormality process (F) that operates when an abnormality occurs during the pearlite filling process in the main processing procedure.
【0013】運転開始処理(A)とパーライト充填処理
(B)は図3に示すように、運転開始処理(A)を終了して
パーライト充填処理(B)と後述する加圧ガス補給処理
(E)に進行するようにしてあり、運転開始処理(A)は、
運転スイッチを操作する(ステップA1)と、カウンター
がリセットされ(ステップA2)、運転スイッチ灯が点灯
(ステップA3)されるプログラムで構成されている。な
お、真空ポンプは常時作動状態にほじされている。Operation start processing (A) and perlite filling processing
(B), as shown in FIG. 3, the operation start processing (A) is completed, the pearlite filling processing (B) and the pressurized gas supply processing described later
(E), and the operation start processing (A)
When the operation switch is operated (Step A1), the counter is reset (Step A2) and the operation switch light is turned on.
(Step A3). The vacuum pump is always operated.
【0014】パーライト充填処理(B)では、液化ガス貯
蔵容器(3)の槽間空間(4)内の圧力が設定圧力以下にな
ったか否かを判断し(ステップB1)、槽間空間(4)内の
圧力が設定圧力以下である場合に、パーライトの充填時
間を設定した第1タイマーが計時作動を開始し(ステッ
プB2)、粉末断熱材供給路(9)に配置した粉末断熱材
充填弁(12)を開弁作動させて(ステップB3)粉末断熱材
を槽間空間(4)に供給する。そして、粉末断熱材断熱材
充填弁(12)を開弁作動させた後一定時間(例えば3秒)経
過後(ステップB4)、粉末断熱材供給路(9)に配置した
光電管装置(31)からの出力でパーライトが正常に流動し
ているか否かを判断し(ステップB5)、光電管装置(31)
がパーライトを検出しなかった場合は後述するパーライ
ト供給系異常処理(F)に入る。一方、光電管装置(31)が
パーライトを検出すると、第2タイマーが作動し(ステ
ップB6)、次いで槽間空間(4)内の圧力が設定圧力よ
りも高いか否かを判断し(ステップB7)、槽間空間(4)
内の圧力が設定圧力よりも高い場合には、第1タイマー
の設定時間が経過するまでその状態を維持し、第1タイ
マーでの設定時間が経過すると粉末断熱材充填弁(12)を
閉じて(ステップB8)、パーライトの充填を停止してパ
ーライト充填処理(B)が終了し、次のパーライト加圧処
理(C)に進行する。In the perlite filling process (B), it is determined whether or not the pressure in the inter-chamber space (4) of the liquefied gas storage container (3) has become equal to or lower than a set pressure (step B1). When the pressure in the parentheses is equal to or lower than the set pressure, the first timer for setting the filling time of the pearlite starts timing operation (step B2), and the powder heat insulating material filling valve arranged in the powder heat insulating material supply passage (9). The valve (12) is opened (step B3) to supply the powder heat insulating material to the inter-chamber space (4). After a predetermined time (for example, 3 seconds) has elapsed after the opening operation of the powder heat insulating material filling valve (12) (step B4), the photoelectric tube device (31) arranged in the powder heat insulating material supply passage (9) is used. It is determined whether or not the pearlite is flowing normally based on the output (step B5), and the photoelectric tube device (31)
Does not detect a pearlite, the process enters a pearlite supply system abnormality process (F) described later. On the other hand, when the photoelectric tube device (31) detects the pearlite, the second timer is activated (step B6), and then it is determined whether or not the pressure in the inter-chamber space (4) is higher than the set pressure (step B7). , Space between tanks (4)
If the internal pressure is higher than the set pressure, the state is maintained until the set time of the first timer elapses, and after the set time of the first timer elapses, the powder insulation material filling valve (12) is closed. (Step B8) The filling of pearlite is stopped, the pearlite filling process (B) is completed, and the process proceeds to the next pearlite pressurizing process (C).
【0015】一方、ステップB7おいて、槽間空間(4)
の圧力が設定圧力よりも低い場合には、第2タイマーの
設定時間が経過したか否かを判断し(ステップB10)、
設定定時間が経過しても槽間空間(4)の圧力が上昇しな
い場合には、パーライト供給系でパーライト閉塞が生じ
たものとして、後述するパーライト供給系異常処理(F)
の供給系閉塞処理に入る。On the other hand, in step B7, the space between tanks (4)
If the pressure is lower than the set pressure, it is determined whether the set time of the second timer has elapsed (step B10).
If the pressure in the inter-tank space (4) does not increase even after the set time has elapsed, it is determined that the pearlite blockage has occurred in the pearlite supply system, and the pearlite supply system abnormality processing (F) described later
Of the supply system is closed.
【0016】パーライト加圧処理(C)と運転終了処理
(D)は図4に示すように、前記パーライト充填処理(B)
の終了後、加圧ガス貯溜容器(6)の内圧が設定圧力(例
えばゲージ圧2Kg/cm2)以上に昇圧しているか否かを判
断し(ステップC1)、加圧ガス貯溜容器(6)の内圧が設
定圧力以上になると、加圧ガス供給路(10)に装着したガ
ス加圧弁(13)を急開弁作動させ(ステップC2)、加圧ガ
ス貯溜容器(6)内に貯溜されている加圧用ガスを急激に
槽間空間(4)に注入し、この加圧用ガスのガス圧力で槽
間空間(4)に充填されているパーライト粉末の架橋を潰
したり、パーライト粉末内の空洞を潰して圧縮する。そ
して、ガス加圧弁(13)の開弁とほぼ同時に第3タイマー
が計時を開始し(ステップC3)、加圧用ガス貯溜容器
(6)内の圧力が設定圧力以下に降圧したか否かを判断し
(ステップC4)、加圧用ガス貯溜容器(6)の内圧が設定
圧力以下に低下した場合には、ガス加圧弁(13)を閉弁作
動させる(ステップC5)。そして、このガス加圧を予め
設定した回数だけ行ったか否かを判断し(ステップC
6)、設定した回数のガス加圧操作が終了するまでガス
加圧を繰り返し、設定回数のガス加圧が終了するとカウ
ンターを更新し(ステップC7)、更新したカウンター数
が設定数に達したか否かを判断し(ステップC8)、更新
したカウンター数が設定数に達しない場合には、パーラ
イト充填処理のステップB1に戻り、パーライト充填処
理(B)とパーライト加圧処理(C)を繰り返す。Perlite pressurizing treatment (C) and operation end treatment
(D) shows the pearlite filling treatment (B) as shown in FIG.
After the completion of the above, it is determined whether or not the internal pressure of the pressurized gas storage container (6) has increased to a set pressure (for example, a gauge pressure of 2 kg / cm 2 ) or more (step C1). When the internal pressure of the gas exceeds the set pressure, the gas pressurizing valve (13) attached to the pressurized gas supply passage (10) is rapidly opened (step C2) and stored in the pressurized gas storage container (6). The pressurizing gas is rapidly injected into the inter-vessel space (4), and the gas pressure of the pressurizing gas crushes the cross-linking of the pearlite powder filled in the inter-vessel space (4) or removes the cavity in the pearlite powder. Crush and compress. At approximately the same time as the opening of the gas pressurizing valve (13), the third timer starts measuring time (step C3), and the pressurizing gas storage container is started.
(6) Judge whether the pressure inside is reduced below the set pressure.
(Step C4) When the internal pressure of the pressurized gas storage container (6) falls below the set pressure, the gas pressurizing valve (13) is closed (Step C5). Then, it is determined whether or not this gas pressurization has been performed a predetermined number of times (step C).
6), gas pressurization is repeated until the set number of gas pressurization operations is completed, and when the set number of gas pressurizations is completed, the counter is updated (step C7), and whether the updated counter number has reached the set number It is determined (step C8) whether or not the updated counter number does not reach the set number, the process returns to step B1 of the pearlite filling process, and the pearlite filling process (B) and the pearlite pressurizing process (C) are repeated.
【0017】そして、更新したカウンター数が設定数に
達した場合には、運転終了処理(D)に進行する。運転終
了処理(D)は、回転灯を点灯(ステップD1)した後、充
填終了ランプを点灯(ステップD2)して、充填終了を作
業者に告知する。そして、作業者がリセットボタンを操
作(ステップD3)すると、運転スイッチ灯が消灯(ステ
ップD4)し、充填終了ランプが消灯(ステップD5)し
て運転を完了する。When the updated counter number reaches the set number, the operation proceeds to an operation end process (D). In the operation end processing (D), after turning on the rotating lamp (step D1), the filling end lamp is turned on (step D2) to notify the worker of the end of filling. Then, when the operator operates the reset button (step D3), the operation switch lamp is turned off (step D4), the filling end lamp is turned off (step D5), and the operation is completed.
【0018】一方、パーライト加圧処理(C)のステップ
C4で加圧ガス貯溜容器(6)の内圧が設定圧力まで降圧
しない場合には、第3タイマーの設定時間に達したか否
かを判断し(ステップC9)、第3タイマーの設定時間が
経過しても加圧ガス貯溜容器(6)のガス圧力が設定圧力
まで降下しない場合には、槽間空間(4)に所定量パーラ
イトが充填できたものとして、ガス加圧弁(13)を閉弁作
動(ステップC10)させた後、運転終了処理(D)のステ
ップD1に進行する。On the other hand, if the internal pressure of the pressurized gas storage container 6 does not decrease to the set pressure in step C4 of the pearlite pressurizing process (C), it is determined whether or not the set time of the third timer has been reached. (Step C9) If the gas pressure of the pressurized gas storage container (6) does not drop to the set pressure even after the elapse of the set time of the third timer, the space between tanks (4) is filled with a predetermined amount of perlite. As a result, after the gas pressurizing valve (13) is closed (Step C10), the process proceeds to Step D1 of the operation end processing (D).
【0019】加圧ガス補充処理(E)は、パーライト充填
処理(B)やガス加圧処理(C)と並行して作動するもの
で、図5に示すように、加圧ガス貯溜容器(6)の内圧が
設定圧以下か否かを判断し(ステップE1)、内圧が設定
圧以下に降下した場合には、ガス加圧弁(13)が閉弁して
いるか否かを判断し(ステップE2)、ガス加圧弁(13)が
閉弁状態であれば、加圧ガス補給路(11)に配置した加圧
ガス補給用電磁弁(19)を開弁して(ステップE3)加圧ガ
ス貯溜容器(6)の加圧ガス発生装置(7)から加圧ガス
(乾燥窒素ガス)を槽間空間(4)に供給する。そして、加
圧ガス貯溜容器(6)の内圧が設定圧以上に昇圧したか否
かを判断し(ステップE4)、加圧ガス貯溜容器(6)の内
圧が設定圧以上に昇圧すると、加圧ガス補給用電磁弁(1
9)を閉弁作動(ステップE5)させた後、全体のシステム
が運転停止か否かを判断し(ステップE6)、運転停止で
ないと判断した場合には、ステップE1に戻って、ルー
プを形成する。The pressurized gas replenishment process (E) operates in parallel with the pearlite filling process (B) and the gas pressurization process (C). As shown in FIG. ) Is determined to be below the set pressure (step E1). If the internal pressure drops below the set pressure, it is determined whether the gas pressurization valve (13) is closed (step E2). If the gas pressurizing valve (13) is in the closed state, the pressurized gas replenishing solenoid valve (19) arranged in the pressurized gas replenishing passage (11) is opened (step E3). Pressurized gas from the pressurized gas generator (7) of the container (6)
(Dry nitrogen gas) is supplied to the space between tanks (4). Then, it is determined whether or not the internal pressure of the pressurized gas storage container (6) has risen above the set pressure (step E4). Solenoid valve for gas supply (1
After the valve closing operation of step 9) is performed (step E5), it is determined whether or not the entire system is stopped (step E6). If it is determined that the operation is not stopped, the process returns to step E1 to form a loop. I do.
【0020】また、パーライト充填処理のステップB5
で粉末断熱材供給路(9)内をパーライトが流れていない
と判断した場合には、図6に示すパーライト供給系異常
処理(F)に入る。粉末断熱材供給路(9)内をパーライト
が流れない場合は、粉末断熱材貯蔵容器(5)でのパーラ
イト切れと、粉末断熱材供給路(9)内でのパーライト閉
塞とが考えられる。そして、粉末断熱材貯蔵容器(5)に
パーライトがなくなった場合には、粉末断熱材貯蔵容器
(5)内を加圧しているガス体が抵抗なく槽間空間(4)に
流入することから、槽間空間(4)の圧力が設定圧力より
も高くなるのに対し、粉末断熱材供給路(9)内でパーラ
イトが閉塞した場合には、槽間空間(4)の圧力が設定圧
力よりも低くなることから、槽間圧力を検出して供給路
閉塞かパーライト切れかを判断するようにしてある。Step B5 of the pearlite filling process
If it is determined that the pearlite is not flowing in the powder heat insulating material supply passage (9), the process proceeds to the pearlite supply system abnormality processing (F) shown in FIG. When the pearlite does not flow in the powder heat insulating material supply passage (9), it is considered that the pearlite is cut off in the powder heat insulating material storage container (5) and the pearlite is blocked in the powder heat insulating material supply passage (9). When the perlite is lost in the powder heat insulating material storage container (5), the powder heat insulating material storage container
(5) Since the gas body pressurizing the inside flows into the inter-chamber space (4) without resistance, the pressure of the inter-chamber space (4) becomes higher than the set pressure, whereas the powder heat insulating material supply path If the perlite is blocked in (9), the pressure in the inter-chamber space (4) will be lower than the set pressure, so the inter-chamber pressure is detected to determine whether the supply path is blocked or the perlite is out. It is.
【0021】そして、このパーライト供給系異常処理
(F)は、パーライト充填処理のステップB4で粉末断熱
材供給路(9)内をパーライトが流れていないと判断する
と、第2タイマーが計時作動を開始し(ステップF1)、
次いで槽間空間(4)の内圧が設定圧力よりも高いか低い
かを判断し(ステップF2)、槽間空間(4)の内圧が設定
圧力よりも高い場合には、粉末断熱材貯蔵容器(5)での
パーライト切れとして、パーライト供給路(9)に配置し
た粉末断熱材充填弁(12)を閉弁し(ステップF3)、回転
灯を点灯し(ステップF4)、パーライト切れを表示する
警告灯を点灯する(ステップF5)。そして、粉末断熱材
貯蔵容器(5)にパーライトを充填あるいは、粉末断熱材
貯蔵容器(5)を交換した後、リセットボタンを操作する
(ステップF6)。リセットボタンを操作すると、パーラ
イト切れを表示する警告灯が消灯し(ステップF7)、再
スタートの待機状態になる(ステップF8)。Then, this pearlite supply system abnormality processing
(F), when it is determined in step B4 of the pearlite filling process that pearlite is not flowing in the powder heat insulating material supply passage (9), the second timer starts a time counting operation (step F1),
Next, it is determined whether the internal pressure of the inter-chamber space (4) is higher or lower than the set pressure (Step F2). If the internal pressure of the inter-chamber space (4) is higher than the set pressure, the powder heat insulating material storage container ( As the perlite is cut off in 5), the powder heat insulating material filling valve (12) arranged in the perlite supply passage (9) is closed (step F3), the rotating light is turned on (step F4), and a warning indicating that the perlite is cut off is displayed. The lamp is turned on (step F5). Then, after filling the powder heat insulating material storage container (5) with perlite or replacing the powder heat insulating material storage container (5), the reset button is operated.
(Step F6). When the reset button is operated, the warning light indicating that the pearl light has run out is turned off (step F7), and the apparatus enters a standby state for restart (step F8).
【0022】一方、ステップF2で槽間空間(4)の内圧
が設定圧力よりも低いと判断した場合は、粉末断熱材供
給路(6)での閉塞状態として、第2タイマーの設定時間
が経過したか否かを判断し(ステップF9)、設定時間が
経過すると、パーライト供給路(9)に配置した粉末断熱
材充填弁(12)を閉弁し(ステップF10)、回転灯を点灯
し(ステップF11)、パーライト供給路閉塞を表示する
警告灯を点灯する(ステップF12)。On the other hand, if it is determined in step F2 that the internal pressure of the inter-chamber space (4) is lower than the set pressure, the closed state in the powder heat insulating material supply path (6) is set and the set time of the second timer elapses. It is determined whether or not it has been performed (step F9). When the set time has elapsed, the powder heat insulating material filling valve (12) arranged in the perlite supply path (9) is closed (step F10), and the rotating light is turned on ( In step F11), a warning light indicating the blockage of the perlite supply path is turned on (step F12).
【0023】そして、粉末断熱材供給路(6)でのパーラ
イト閉塞を解除した後、リセットボタンを操作する(ス
テップF13)。リセットボタンを操作すると、パーラ
イト供給路閉塞を表示する警告灯が消灯し(ステップF
14)、再スタートの待機状態になる(ステップF1
5)。After the pearlite blockage in the powder heat insulating material supply passage (6) is released, the reset button is operated (step F13). When the reset button is operated, the warning light indicating the blockage of the perlite supply path is turned off (step F).
14), and waits for restart (step F1)
5).
【0024】また、パーライト充填処理(B)のステップ
B7において、第2タイマーの設定時間が経過しても槽
間空間(4)の圧力が設定圧力よりも上昇しない場合に
は、ステップB10から、直接パーライト供給系異常処
理のステップF10に進行する。そして、再スタートを
する際には、運転スイッチを作動させると(ステップA
5)、運転開始処理(A)のステップA3に入り、パーラ
イト充填処理(B)を再び進行させる。In step B7 of the perlite filling process (B), if the pressure in the inter-chamber space (4) does not rise above the set pressure even after the set time of the second timer has elapsed, the process proceeds from step B10. The process proceeds to Step F10 of the direct perlite supply system abnormality process. Then, when restarting, the operation switch is operated (step A).
5), Step A3 of the operation start processing (A) is started, and the pearlite filling processing (B) is advanced again.
【0025】上述のような流れをとるパーライト充填処
理では、パーライト充填作業を全自動でおこなうことが
できるから、昼夜作業でパーライト充填を行うことがで
きることになる。In the pearlite filling process having the above-described flow, the pearlite filling operation can be performed fully automatically, so that the pearlite filling can be performed day and night.
【0026】なお上記実施例では、粉末断熱材としてパ
ーライトを使用するものについて説明したが、粉末断熱
材としては、マイクロセル等の粉末真空断熱に使用する
粉末断熱材が使用できる。また、粉末断熱材の加圧処理
に使用する加圧ガスとしては、前記実施例で使用した液
体窒素の気化ガスのほかカードル等に充填されている窒
素ガスや乾燥空気等の水分や油分のない乾燥ガスを使用
することができる。さらに、上記粉末断熱材供給路(9)
に配置した粉末断熱材充填弁(12)やガス加圧路(10)に配
置したガス加圧弁(13)は電動式であってもよい。In the above-described embodiment, the case where pearlite is used as the powder heat insulating material has been described. However, as the powder heat insulating material, a powder heat insulating material such as a microcell used for powder vacuum heat insulating can be used. Further, as the pressurized gas used for the pressurizing process of the powder heat insulating material, there is no moisture or oil such as nitrogen gas or dry air which is filled in the curl or the like, in addition to the vaporized gas of liquid nitrogen used in the above embodiment. Dry gas can be used. Furthermore, the powder heat insulating material supply path (9)
The gas heat-insulating material filling valve (12) disposed in the gas pressurizing valve (13) and the gas pressurizing valve (13) disposed in the gas pressurizing path (10) may be electrically operated.
【0027】[0027]
【発明の効果】以上述べたように本発明では、真空ポン
プで吸引されている液化ガス貯蔵槽の槽間空間に粉末断
熱材と乾燥ガスとを一定時間ごとに切り換えて供給する
ことにより、粉末断熱材の充填操作と乾燥ガスによる加
圧操作とを自動的に繰り返して行うようにしていること
から、槽間空間に所定密度の粉末断熱材を均一に自動充
填することができる。これにより、昼夜作業で粉末断熱
材を槽間空間に充填することができる。As described above, according to the present invention, the powder heat insulating material and the dry gas are switched and supplied to the space between the liquefied gas storage tanks sucked by the vacuum pump at regular time intervals, so that the powder is dried. Since the filling operation of the heat insulating material and the pressurizing operation with the dry gas are automatically and repeatedly performed, the space between the tanks can be automatically and uniformly filled with the powder heat insulating material of a predetermined density. This allows the space between the tanks to be filled with the powder heat insulating material during day and night operations.
【0028】また、粉末断熱材を均一密度で充填するた
めに、ガス加圧を利用しているので、液化ガス貯蔵槽に
振動を与えなくてもよく、振動に伴う騒音発生や構造部
品の振動による悪影響がなくなる。さらに、粉末断熱材
の供給路や加圧ガス配管を接続した後の粉末断熱材充填
弁やガス加圧弁の開閉は自動的に行われることになるか
ら、高所作業が大幅に減少し、作業の安全性を高めるこ
とができる。Further, since gas pressurization is used to fill the powder heat insulating material with a uniform density, it is not necessary to apply vibration to the liquefied gas storage tank. The adverse effects of Furthermore, the opening and closing of the powder insulation material filling valve and gas pressure valve after connecting the powder insulation material supply path and pressurized gas pipe will be performed automatically, so work at heights will be greatly reduced, Safety can be improved.
【0029】さらに、粉末断熱材供給路に粉末断熱材の
流動を検知する光電管装置を配置しているので、粉末断
熱材貯蔵容器での粉末断熱材がなくなり、あるいは、粉
末断熱材供給路内での閉塞が生じて粉末断熱材供給路内
を粉末断熱材が流れていないことを光電管装置が検知す
ると、異常状態であると判断して異常報知をすることに
なるから、充填作業時での異常状態を早い時期に知るこ
とができ、それに対する対策を迅速に採ることができる
から、粉末断熱材の充填作業を効率よく行うことができ
る。 Further, the powder heat insulating material is supplied to the powder heat insulating material supply passage.
Since a phototube device that detects flow is installed,
Eliminate powder insulation in thermal material storage
Blockage in the powder heat insulating material supply path causes powder heat insulation material supply path
The phototube device detects that the powder insulation is not flowing
Then, it is determined that it is in an abnormal state, and
Therefore, it is important to know at an early stage
And quickly take countermeasures against it
From this, the work of filling the powder insulation can be performed efficiently.
You.
【図1】液化ガス貯蔵槽への粉末断熱材充填装置の系統
図である。FIG. 1 is a system diagram of a device for filling a liquefied gas storage tank with a powder heat insulating material.
【図2】断熱材充填手順の全体を示す概略流れ図であ
る。FIG. 2 is a schematic flow chart showing the whole heat insulating material filling procedure.
【図3】運転開始処理とパーライト充填処理のフローチ
ャートである。FIG. 3 is a flowchart of an operation start process and a pearlite filling process.
【図4】パーライト加圧処理と運転終了処理のフローチ
ャートである。FIG. 4 is a flowchart of a pearlite pressurizing process and an operation end process.
【図5】加圧ガス補給処理のフローチャートである。FIG. 5 is a flowchart of a pressurized gas supply process.
【図6】パーライト供給系異常処理のフローチャートで
ある。FIG. 6 is a flowchart of a perlite supply system abnormality process.
1…内槽、2…外槽、3…液化ガス貯蔵槽、4…槽間空
間、5…粉末断熱材貯蔵容器、6…加圧ガス貯溜容器、
8…真空ポンプ、9…粉末断熱材供給路、10…加圧ガス
供給路、12…粉末断熱材充填弁、13…ガス加圧弁、B…
粉末断熱材充填工程、C…粉末断熱材加圧工程。DESCRIPTION OF SYMBOLS 1 ... Inner tank, 2 ... Outer tank, 3 ... Liquefied gas storage tank, 4 ... Space between tanks, 5 ... Powder heat insulating material storage container, 6 ... Pressurized gas storage container,
8: vacuum pump, 9: powder heat insulating material supply path, 10: pressurized gas supply path, 12: powder heat insulating material filling valve, 13: gas pressure valve, B ...
Powder insulation material filling step, C ... powder insulation material pressing step.
フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B65B 1/16 B65D 90/06 F16L 59/00 F16L 59/06 3H025 AA01*AB01*[B B08+BB09]Continuation of the front page (58) Fields investigated (Int. Cl. 6 , DB name) B65B 1/16 B65D 90/06 F16L 59/00 F16L 59/06 3H025 AA01 * AB01 * [B B08 + BB09]
Claims (1)
(1)の外周を覆う外槽(2)との間を粉末真空断熱してい
る液化ガス貯蔵槽(3)の槽間空間(4)に粉末断熱材を充
填するに当たり、 槽間空間(4)を真空ポンプ(8)に連通接続し、槽間空間
(4)と粉末断熱材貯蔵容器(5)とを粉末断熱材供給路
(9)で連通接続するとともに、槽間空間(4)に加圧ガス
貯溜容器(6)を加圧ガス供給路(10)で接続し、粉末断熱
材供給路(9)に粉末断熱材充填弁(12)と粉末断熱材の流
動を検知する光電管装置(31)とを配置し、加圧ガス供給
路(10)にガス加圧弁(13)を配置し、粉末断熱材充填弁(1
2)を一定時間開弁して粉末断熱材を真空引きされている
槽間空間(4)に供給する粉末断熱材充填工程(B)と、こ
の粉末断熱材充填工程(B)の終了後にガス加圧弁(13)を
一定時間開弁して加圧ガス貯溜容器(6)に貯蔵されてい
る乾燥ガスを真空引きされている槽間空間(4)に供給す
る粉末断熱材加圧工程(C)とを所定回数繰り返すように
し、粉末断熱材充填工程(B)で粉末断熱材供給路(9)に
配置した光電管装置(31)が粉末断熱材の流動停止状態を
検出した際には粉末断熱材充填弁(12)を閉弁するととも
に異常状態であることを報知するように構成した液化ガ
ス貯蔵槽への粉末断熱材の自動充填方法。1. An inner tank (1) for storing liquefied gas and this inner tank
When filling the space between the tanks (4) of the liquefied gas storage tank (3), which has vacuum insulation between the outer tank (2) and the outer tank (2) covering the outer periphery of (1), with the powder interstitial space (4) ) Is connected to the vacuum pump (8) and the space between tanks
(4) The powder heat insulating material storage container (5) and the powder heat insulating material supply path
In addition to the communication connection at (9), the pressurized gas storage container (6) is connected to the space between tanks (4) by the pressurized gas supply path (10), and the powder heat insulation material supply path (9) is filled with the powder heat insulation material. Valve (12) and flow of powder insulation
A photoelectric tube device (31) for detecting movement is arranged , a gas pressurizing valve (13) is arranged in the pressurized gas supply path (10), and a powder heat insulating material filling valve (1
(2) The valve is opened for a certain period of time to supply the powder heat insulating material to the inter-chamber space (4) where the vacuum is drawn, and the powder heat insulating material is filled after the powder heat insulating material filling step (B) is completed. pressurizing valve (13) a powder heat insulator pressurizing step of supplying a dry gas stored in a certain time open to pressurized gas reservoir vessel (6) in a bath between space being evacuated (4) (C ) Is repeated a predetermined number of times, and the powder heat insulating material supply path (9) is filled in the powder heat insulating material filling step (B).
The placed phototube device (31) stops the flow of the powder heat insulating material.
When detected, the powder insulation material filling valve (12) is closed and
Automatic filling of a liquefied gas storage tank with a powdered heat insulating material, which is configured to notify the abnormal condition .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6150758A JP2762233B2 (en) | 1994-07-01 | 1994-07-01 | Automatic filling method of powder thermal insulation into liquefied gas storage tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6150758A JP2762233B2 (en) | 1994-07-01 | 1994-07-01 | Automatic filling method of powder thermal insulation into liquefied gas storage tank |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0811804A JPH0811804A (en) | 1996-01-16 |
JP2762233B2 true JP2762233B2 (en) | 1998-06-04 |
Family
ID=15503778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6150758A Expired - Fee Related JP2762233B2 (en) | 1994-07-01 | 1994-07-01 | Automatic filling method of powder thermal insulation into liquefied gas storage tank |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2762233B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8240344B2 (en) | 2008-08-05 | 2012-08-14 | Chicago Bridge & Iron Company | Method and apparatus for insulating a component of a low-temperature or cryogenic storage tank |
JP2012145205A (en) * | 2011-01-14 | 2012-08-02 | Koatsu Gas Kogyo Co Ltd | Fluid supply system |
CN109469818A (en) * | 2018-12-10 | 2019-03-15 | 中国空分工程有限公司 | A kind of device and method for the not parking supplement expanded perlite of large-scale low-temperature storage tank |
JP7282517B2 (en) * | 2018-12-27 | 2023-05-29 | 川崎重工業株式会社 | Vacuum double-shell tank and its perlite replenishment method |
JP2024068427A (en) * | 2022-11-08 | 2024-05-20 | 川崎重工業株式会社 | Granular insulation filling device and method |
JP2024068426A (en) * | 2022-11-08 | 2024-05-20 | 川崎重工業株式会社 | Granular insulation filling device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH084981A (en) * | 1994-06-24 | 1996-01-12 | Nippon Sanso Kk | Method of device for charging granular heat-insulating material into heat-insulating space |
-
1994
- 1994-07-01 JP JP6150758A patent/JP2762233B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0811804A (en) | 1996-01-16 |
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