JPH0547050B2 - - Google Patents
Info
- Publication number
- JPH0547050B2 JPH0547050B2 JP62151208A JP15120887A JPH0547050B2 JP H0547050 B2 JPH0547050 B2 JP H0547050B2 JP 62151208 A JP62151208 A JP 62151208A JP 15120887 A JP15120887 A JP 15120887A JP H0547050 B2 JPH0547050 B2 JP H0547050B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- double pipe
- pressure
- pipe
- electric heater
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 6
- 230000002706 hydrostatic effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、極低温冷媒（液体窒素）の液面の、
簡便かつ連続的な測定に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to the liquid level of cryogenic refrigerant (liquid nitrogen).
Concerning simple and continuous measurement.
従来、極低温冷媒（液体窒素等）の貯槽の液面
を測定する方法として数多くの例が報告されてい
る。その中でも、液体の静水圧を利用する。比較
的簡単な構造の、液面計が、「低温」（共立出版社
発行）の107頁に記載されている。
Conventionally, many examples have been reported as methods for measuring the liquid level of a storage tank of cryogenic refrigerant (liquid nitrogen, etc.). Among them, it utilizes the hydrostatic pressure of the liquid. A liquid level gauge with a relatively simple structure is described on page 107 of ``Kyoto'' (published by Kyoritsu Publishing).
ところが、貯槽内の圧力が変化したりすると液
の底からの圧力取入れ管の中に液体が昇り、不正
確な値が検知されてしまうという難点があつた。
However, when the pressure inside the storage tank changes, the liquid rises into the pressure intake pipe from the bottom of the liquid, resulting in inaccurate values being detected.
本発明の目的は、構造が簡単で応答性に優れた
極低温冷媒液面計を提供することにある。 An object of the present invention is to provide a cryogenic refrigerant level gauge that has a simple structure and excellent responsiveness.
本発明は、静水圧を利用した極低温冷媒の液面
測定にあたり、下部圧力取り入れ管の断熱二重管
内部に電気ヒータを設けたことによる、簡単な構
造で、しかも感度の良い極低温冷媒液面計を得よ
うとするものである。
The present invention uses hydrostatic pressure to measure the liquid level of cryogenic refrigerant by providing an electric heater inside the insulated double pipe of the lower pressure intake pipe, which has a simple structure and high sensitivity. It is an attempt to obtain a surface meter.
液面は静水圧に基づいて検出する。この際二重
管内を液体が流入するがヒータを加熱して管内の
液体を蒸発させ、管下端に液面を維持する。
The liquid level is detected based on hydrostatic pressure. At this time, liquid flows into the double tube, but the heater is heated to evaporate the liquid inside the tube and maintain the liquid level at the lower end of the tube.
以下、本発明の実施例を図により説明する。真
空層１によつて断熱された二重管２は、ステンレ
ス鋼などで作る。この二重管２の最下部内面に、
電気ヒータ４を取り付けておき、二重管２を被測
定液体５中に浸す。この二重管２は、最下端３よ
り液の底の圧力を取り入れる管である。液面６よ
り上部のガス層を介して伝えられる液面６の圧力
を取り入れるのが７の管で、ガス層圧力取入れ口
７と二重管２を小型電気式差圧計８に取り付け、
この電圧端子を電気ヒータ４電源及び、計測器９
につなぎ計測する。又、電気ヒータ４のリード線
を外部に取り出しているのがターミナル１１であ
り、このターミナル１１と電気ヒータ４電源及
び、計測器９を配線する。二重管２とガス層圧力
取入れ口７を固定かつ断熱液体容器１０中の気密
を保つため、ステンレス鋼製継手１２を設け、手
軽に容器１０との着脱が出来る。
Embodiments of the present invention will be described below with reference to the drawings. The double pipe 2 insulated by the vacuum layer 1 is made of stainless steel or the like. On the lowermost inner surface of this double pipe 2,
An electric heater 4 is attached and the double tube 2 is immersed in the liquid 5 to be measured. This double pipe 2 is a pipe that takes in the pressure at the bottom of the liquid from the lowermost end 3. The pipe 7 takes in the pressure of the liquid level 6 transmitted through the gas layer above the liquid level 6, and the gas layer pressure intake 7 and the double pipe 2 are attached to a small electric differential pressure gauge 8.
Connect this voltage terminal to the electric heater 4 power supply and measuring device 9
Connect to and measure. Further, a terminal 11 takes out the lead wire of the electric heater 4 to the outside, and a power source for the electric heater 4 and a measuring instrument 9 are wired to this terminal 11. In order to fix the double pipe 2 and the gas layer pressure intake port 7 and to maintain airtightness in the insulating liquid container 10, a stainless steel joint 12 is provided so that it can be easily attached to and detached from the container 10.
液中に浸された二重管２の下端内面に取り付け
ている電気ヒータ４を加熱すると、断熱二重管の
内部に昇つていた液体を蒸発させ、容器１０底近
くに位置する二重管２の下部端面３までガスが充
満し常に端面３の位置に二重管内の液面が保たれ
る。この事により二重管２内部とガス槽との圧力
差から正確な液面６の位置を測定出来る。 When the electric heater 4 attached to the inner surface of the lower end of the double pipe 2 immersed in the liquid is heated, the liquid rising inside the heat insulating double pipe is evaporated, and the double pipe located near the bottom of the container 10 is heated. Gas fills up to the lower end face 3 of the double pipe, and the liquid level in the double pipe is always maintained at the end face 3. This makes it possible to accurately measure the position of the liquid level 6 from the pressure difference between the inside of the double pipe 2 and the gas tank.
本実施例によれば、例えば液体を容器１０の外
にサイホンで汲み出すために容器１０内に圧力を
かけた際、二重管内部に液体が昇るが、これを迅
速に追い出して正確な液面の検出ができる。 According to this embodiment, for example, when pressure is applied inside the container 10 to siphon liquid out of the container 10, the liquid rises inside the double pipe, but this can be quickly expelled and the liquid can be accurately dispensed. Can detect surfaces.
二重管２は複合プラスチツク等の低熱伝導材か
らなる一重管でもよい。又、電気ヒータは常時通
電する必要まなく、計測時、あるいは圧力変動時
に通電するだけでもよい。 The double pipe 2 may be a single pipe made of a low heat conductive material such as composite plastic. Further, the electric heater does not need to be energized all the time, and may only be energized during measurement or when pressure fluctuates.
以上述べた如く、本発明によれば、構造が簡単
で連続的な計測が可能、しかも、正確な液面を計
測することの可能な、極低温冷媒液面計を得る効
果がある。
As described above, the present invention has the effect of providing a cryogenic refrigerant level meter that has a simple structure, is capable of continuous measurement, and is capable of accurately measuring the liquid level.
図は、本発明の実施例を示す縦断面図である。
１……二重管、４……電気ヒータ、５……液
体、１０……容器。
The figure is a longitudinal sectional view showing an embodiment of the present invention. 1...double pipe, 4...electric heater, 5...liquid, 10...container.
Claims (1)
力取入管の断熱管内部に電気ヒータを設けたこと
を特徴とする極低温冷媒液面計。1. A cryogenic refrigerant level gauge using hydrostatic pressure, characterized in that an electric heater is provided inside the insulated pipe of the sub-liquid pressure intake pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62151208A JPS62294914A (en) | 1987-06-19 | 1987-06-19 | Super-low temperature solvent liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62151208A JPS62294914A (en) | 1987-06-19 | 1987-06-19 | Super-low temperature solvent liquid level meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62294914A JPS62294914A (en) | 1987-12-22 |
| JPH0547050B2 true JPH0547050B2 (en) | 1993-07-15 |
Family
ID=15513599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62151208A Granted JPS62294914A (en) | 1987-06-19 | 1987-06-19 | Super-low temperature solvent liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62294914A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068948A (en) * | 2007-09-12 | 2009-04-02 | Cryovac Corp | Liquid level gage for cryogenic liquid and storage vessel for cryogenic liquid equipped with the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2620096B2 (en) * | 1988-02-29 | 1997-06-11 | 東京エレクトロン株式会社 | Coating device |
| CN102519543B (en) * | 2011-12-14 | 2013-02-13 | 张家港圣汇气体化工装备有限公司 | Pressure detection device of differential pressure levelmeter for cryogenic liquid storage tank |
-
1987
- 1987-06-19 JP JP62151208A patent/JPS62294914A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068948A (en) * | 2007-09-12 | 2009-04-02 | Cryovac Corp | Liquid level gage for cryogenic liquid and storage vessel for cryogenic liquid equipped with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62294914A (en) | 1987-12-22 |
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