JPS62220814A - Method for measuring evaporation rate of liquefied gas - Google Patents
Method for measuring evaporation rate of liquefied gasInfo
- Publication number
- JPS62220814A JPS62220814A JP61063984A JP6398486A JPS62220814A JP S62220814 A JPS62220814 A JP S62220814A JP 61063984 A JP61063984 A JP 61063984A JP 6398486 A JP6398486 A JP 6398486A JP S62220814 A JPS62220814 A JP S62220814A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- low
- control valve
- liquefied gas
- evaporation
- 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
- 230000008020 evaporation Effects 0.000 title claims abstract description 20
- 238000001704 evaporation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000001307 helium Substances 0.000 description 15
- 229910052734 helium Inorganic materials 0.000 description 15
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 15
- 239000007788 liquid Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、液体ヘリウム容器などに貯蔵した低温液化
ガスの蒸発量を測定するための液化ガスの蒸発量測定方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring the amount of evaporation of liquefied gas for measuring the amount of evaporation of low-temperature liquefied gas stored in a liquid helium container or the like.
８ｇ２図は、アトバイセス イン クライオゼニック
エンジニアリング、＠コ！巻、弘ざ９頁、第３図［Ａｄ
ｖａｎｃｅｓ ｉｎＣｒｙｏｇｅｎｉｃ Ｅｎｇｉｎｅ
ｅｒｉｎｇ 、 Ｖｏｌ ２ ｓ 、 Ｐ ｕ ｔ ９
、 Ｆｉｇ、７．１に示された従来の液体ヘリウムの
蒸発量測定手段のこの発明に関する部分を示し、図にお
いて、低温容器（２０）の真空槽（ハ内に、液体窒素槽
ｃ２）、液体ヘリウム中槽（３）、液体ヘリウム内槽（
す）が収納されている６（ｊ）は試料であり、シールド
板（６１で囲まれている。液体ヘリウムの蒸発量は、流
量計（り）で測定される。Figure 8g2 shows Atobyces in cryogenics.
Engineering @ko! Volume, Hiroza page 9, Figure 3 [Ad
vances in Cryogenic Engine
ering, Vol 2 s, P ut 9
, shows the part related to the present invention of the conventional liquid helium evaporation measurement means shown in Fig. 7.1. Helium inner tank (3), liquid helium inner tank (
Reference numeral 6(j) in which a sample is housed is a sample, which is surrounded by a shield plate (61).The amount of evaporation of liquid helium is measured with a flow meter.
以上の構成において、液体窒素槽（コ）には液体窒素が
貯められ、温度約７ｔｌに冷却されており。In the above configuration, liquid nitrogen is stored in the liquid nitrogen tank (k) and cooled to a temperature of about 7 tl.
シールド板（６）も同じ温度に保持されている。、液体
ヘリウム内槽（１１１には液体ヘリウムが貯められ、温
度約弘、２″Ｋに冷却されるとともに試料（ｓ）も同じ
温度に保持されている。液体ヘリウム中槽（Ｊｌにも液
体ヘリウムが貯められ、温度釣り、２″にとなっている
。The shield plate (6) is also maintained at the same temperature. , liquid helium is stored in the liquid helium inner tank (111) and cooled to a temperature of approximately 2"K, and the sample (s) is also maintained at the same temperature. is stored, temperature fishing, and becomes 2″.
以上のような温度構成において、液体ヘリウム内槽（ｌ
Ｉｌに貯められた液体ヘリウムの蒸発量は、真空槽（ハ
の内部が／ Ｘ ／ Ｏ−”ｒｏｒｒ以下の超高真空で
あることから、シールド板（６１から試料（３１への熱
ふく対量に比例したものになる。つまり、試料（Ｓ）の
熱ふく射量を求めるものであり、液体ヘリウムの蒸発量
は流量計（り）によって測定され吐出ガスは大気中に放
出される。In the above temperature configuration, the liquid helium inner tank (l
The amount of evaporation of liquid helium stored in Il is determined by the amount of heat evaporation from the shield plate (61 to the sample (31 In other words, the amount of heat radiation of the sample (S) is determined, the amount of evaporation of liquid helium is measured by a flow meter, and the discharged gas is released into the atmosphere.
以上のような従来の液化ガスの蒸発量測定方法では、流
量計の吐出側が大気に通じていたため、前記引用文献に
示されるように、流量計による計測値が大気圧の変化に
よって乱され、誤差が発生し易いという問題点があった
。In the conventional method for measuring the amount of evaporation of liquefied gas as described above, the discharge side of the flowmeter communicates with the atmosphere, so as shown in the cited document, the measured value by the flowmeter is disturbed by changes in atmospheric pressure, resulting in errors. There was a problem in that it was easy for this to occur.
この発明は上記の問題点を解消するためになされたもの
で、大気圧の影響を除き、正確な測定ができる液化ガス
の蒸発量測定方法を得ることを目的とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for measuring the amount of evaporation of liquefied gas, which eliminates the influence of atmospheric pressure and allows accurate measurement.
この発明に係る液化ガスの蒸発量測定方法は。 A method for measuring the amount of evaporation of liquefied gas according to the present invention.
流量計の吐出側を制御弁を経由して排気速度の充分大き
な真空ポンプと接続し、かつ、低温容器内の圧力を検知
して制御弁をコントロールし、低温容器内の圧力を一定
に保持する。The discharge side of the flowmeter is connected via a control valve to a vacuum pump with a sufficiently high pumping speed, and the pressure inside the cryogenic container is detected and the control valve is controlled to maintain a constant pressure inside the cryogenic container. .
この発明においては、低温容器内の一定圧力下で流量を
測定し、かつ、Ｉ５！ｉ計の吐出ガスを大気中に放出し
ないため、大気圧力の影響を受けない。In this invention, the flow rate is measured under a constant pressure in a cryogenic container, and I5! Since the discharge gas of the i-meter is not released into the atmosphere, it is not affected by atmospheric pressure.
以下、この発明の一実施例を第１図を参照して説明する
。図において、液体ヘリウム内槽（ｌＩｌに圧力センサ
（ｆｆｌが接続されている。流量計（７１の吐出側は、
制御弁（１０）を経て真空ポンプ（／／）に接続されて
いる。コントロールユニット（ｑｌは、圧力センサ（ｔ
ｌからの信号で制御弁（１０）を制御する。その他、第
２図におけると同一符号は同一の部分を示している。An embodiment of the present invention will be described below with reference to FIG. In the figure, a pressure sensor (ffl) is connected to the liquid helium inner tank (lIl. The discharge side of the flowmeter (71) is
It is connected to a vacuum pump (//) via a control valve (10). The control unit (ql is the pressure sensor (t)
A control valve (10) is controlled by a signal from l. In addition, the same reference numerals as in FIG. 2 indicate the same parts.
液体ヘリウム内槽（り）からの液体ヘリウムの蒸発現象
、流量計（７１による計測は、第２図を用いて説明した
従来の場合と同様である。しかしながら、低温容器（２
０）の内圧を測定する圧力センサ（ｇｌを備え、流量計
（７）の吐出側を、制御弁（１０）を経由して、液化ガ
スの蒸発量と比べて充分大きな排気速度の真空ポンプＣ
ｌ１１で真空引きを行う。また、圧力センサＴｆｆｌの
出力信号をコントロールユニット（り）に入力し、この
コントロールユニット（デ）ヲ介シて制御弁（１０）を
操作させる。つまり、制御弁（／θ）は低温容器（２０
）の内圧が任意の一定値に維持されるように動作し、こ
の圧力での蒸発量が測定されることになる。さらに、制
御弁（１０）の出口側の圧力は真空ポンプ（／／〕の排
気速度が充分大きいため、常に０．７Ｔｏｒｒ以下の真
空状態に保持されている。The evaporation phenomenon of liquid helium from the liquid helium inner tank (ri) and the measurement by the flowmeter (71) are the same as in the conventional case explained using FIG.
The discharge side of the flowmeter (7) is connected to a vacuum pump C with a sufficiently large pumping speed compared to the amount of evaporation of the liquefied gas, via a control valve (10).
Vacuuming is performed at l11. Further, the output signal of the pressure sensor Tffl is inputted to the control unit (RI), and the control valve (10) is operated through this control unit (D). In other words, the control valve (/θ) is
) is operated to maintain the internal pressure at an arbitrary constant value, and the amount of evaporation at this pressure is measured. Further, the pressure on the outlet side of the control valve (10) is always maintained at a vacuum state of 0.7 Torr or less because the pumping speed of the vacuum pump (//) is sufficiently high.
なお、上記実施例では、低温液化ガスの種類はヘリウム
として説明したが、その他の液化ガス。In the above embodiments, the type of low-temperature liquefied gas is helium, but other liquefied gases may be used.
例えば水素、アルゴン、窒素、酸素などにも適用できる
ことはいうまでもない。It goes without saying that it can also be applied to hydrogen, argon, nitrogen, oxygen, etc., for example.
空ポンプと接続し、かつ、低温容器内の圧力を一定に維
持するようにしたので、大気圧力の変動の影響を受けず
、精度の高い測定値が得られる効果がある。Since it is connected to an empty pump and the pressure inside the cryogenic container is maintained constant, it is not affected by fluctuations in atmospheric pressure and has the effect of obtaining highly accurate measurement values.
第１図はこの発明の一実施例を説明するための装置の正
断面図、第２図は従来の液化ガスの蒸発量測定方法を説
明するための装置の正断面図である。
（ハ・・真空槽、（ｌＩｌ・・液体ヘリウム内槽、（ｊ
ｌ・・試料％（７）φｅ流量計、（ｆｆｌ・・圧力セン
サ、（９）・・コントロールユニット、（／１７）・・
制ｍ弁。
（ｉ／ｅｍ・真空ポンプ、（２０）・・低温容器。
なお、各図中、同一符号は同−又は相当部分を示す。
尾１図
７゜流量針
８二／Ｅ力”ｔ＝’、’７
ＩＱ ： ＠＠謬
＋＋ １空Ｉｊ１−アFIG. 1 is a front sectional view of an apparatus for explaining an embodiment of the present invention, and FIG. 2 is a front sectional view of an apparatus for explaining a conventional method for measuring the amount of evaporation of liquefied gas. (c... Vacuum tank, (lIl... Liquid helium inner tank, (j
l... Sample % (7) φe flowmeter, (ffl... Pressure sensor, (9)... Control unit, (/17)...
Control m valve. (i/em vacuum pump, (20)...low temperature container. In each figure, the same reference numerals indicate the same or equivalent parts. '7 IQ: @@false++ 1 empty Ij1-a
Claims (1)
るための流量計および前記低温容器内の圧力を計測する
ための圧力センサを備え、前記流量計の吐出側を制御弁
を経由して前記低温液化ガスの蒸発量に比べて充分大き
な排気速度を持つ真空ポンプに接続し、前記圧力センサ
からの信号により前記制御弁を制御して前記低温容器内
の圧力を一定値に保持する液化ガスの蒸発量測定方法。A flow meter for measuring the amount of evaporation of low-temperature liquefied gas stored in a low-temperature container and a pressure sensor for measuring the pressure inside the low-temperature container are provided, and the discharge side of the flow meter is connected to the The liquefied gas is connected to a vacuum pump having a sufficiently large pumping speed compared to the amount of evaporation of the low-temperature liquefied gas, and the control valve is controlled by the signal from the pressure sensor to maintain the pressure in the low-temperature container at a constant value. Evaporation measurement method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61063984A JPS62220814A (en) | 1986-03-24 | 1986-03-24 | Method for measuring evaporation rate of liquefied gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61063984A JPS62220814A (en) | 1986-03-24 | 1986-03-24 | Method for measuring evaporation rate of liquefied gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62220814A true JPS62220814A (en) | 1987-09-29 |
Family
ID=13245058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61063984A Pending JPS62220814A (en) | 1986-03-24 | 1986-03-24 | Method for measuring evaporation rate of liquefied gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62220814A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4999181A (en) * | 1987-11-25 | 1991-03-12 | U.S. Philips Corporation | Method of manufacturing titanium dioxide powder |
| CN102410969A (en) * | 2011-08-09 | 2012-04-11 | 南京丰盛超导技术有限公司 | Device for measuring volatile ratio of superconducting magnet liquid helium |
| CN107907179A (en) * | 2017-10-31 | 2018-04-13 | 王吕铭 | A kind of arbitrary shaped body volume measuring instrument |
| CN108534820A (en) * | 2018-03-27 | 2018-09-14 | 大连理工大学 | A kind of cryogenic liquid tank container dynamic evaporation rate measurement method |
-
1986
- 1986-03-24 JP JP61063984A patent/JPS62220814A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4999181A (en) * | 1987-11-25 | 1991-03-12 | U.S. Philips Corporation | Method of manufacturing titanium dioxide powder |
| CN102410969A (en) * | 2011-08-09 | 2012-04-11 | 南京丰盛超导技术有限公司 | Device for measuring volatile ratio of superconducting magnet liquid helium |
| CN107907179A (en) * | 2017-10-31 | 2018-04-13 | 王吕铭 | A kind of arbitrary shaped body volume measuring instrument |
| CN108534820A (en) * | 2018-03-27 | 2018-09-14 | 大连理工大学 | A kind of cryogenic liquid tank container dynamic evaporation rate measurement method |
| CN108534820B (en) * | 2018-03-27 | 2020-04-07 | 大连理工大学 | Method for measuring dynamic evaporation rate of cryogenic liquid tank container |
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