JPH0348508Y2 - - Google Patents
Info
- Publication number
- JPH0348508Y2 JPH0348508Y2 JP1983023338U JP2333883U JPH0348508Y2 JP H0348508 Y2 JPH0348508 Y2 JP H0348508Y2 JP 1983023338 U JP1983023338 U JP 1983023338U JP 2333883 U JP2333883 U JP 2333883U JP H0348508 Y2 JPH0348508 Y2 JP H0348508Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- liquid
- mounting flange
- tube
- cryogenic liquid
- 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
- 239000007788 liquid Substances 0.000 claims description 39
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 2
- 239000003949 liquefied natural gas Substances 0.000 description 16
- 230000000903 blocking effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
【考案の詳細な説明】
本考案はLNG（液化天然ガス）の極低温液体の
測温装置に関するものである。[Detailed description of the invention] The present invention relates to a temperature measuring device for cryogenic liquid such as LNG (liquefied natural gas).
従来、液体の温度は、液体が流過する配管の管
壁に測温体の感温部を埋設して測定している。配
管の管壁の温度はあくまでも管壁の温度であつて
液体そのものの温度ではなく、特に極低温液体の
LNGでは大気温度の影響を受け易い。このため、
第１図に示すように、極低温液体の温度測定に配
管に装着孔を貫設しそこから保護管１の中央部に
位置させ収容した棒状のシース型測温体２を挿入
し、極低温の液体内に没入させる。測温体２は液
中にあるといえども保護管１で覆われて液体に直
接接触してなくその基端側は大気に露出し外熱
（大気温度）を伝達し実温より高めの温度を指示
し易く、保護管１の外熱の影響をなくするために
は液中に没入する保護管１の長さを十分に長く設
定する必要がある。また、保護管１は測温体２を
中央に位置させ収容しているものであり熱容量が
大きく応答速度が遅く温度の真値を指示するのに
時間遅れがある。このように、測温体２と液体と
の間には保護管１が介在し測温体２の感温部２ａ
は液体が直接接触してないため、保護管の熱抵抗
を可及的に減らし液温と感温部２ａとの温度差を
減少させる必要がある。さらに、−160℃程度の極
低温のLNGの測定であると、冷熱の影響により
保護管１の基端を固着する取付フランジ３上面ま
で冷却し水分が凝結し易くなり、凝結が、取付フ
ランジ３の上方に連結されたターミナルヘツド４
内に収容された端子盤までいたると端子間の絶縁
がなくなり指示不良を生じ易い。 Conventionally, the temperature of a liquid has been measured by embedding a temperature sensing part of a temperature measuring element in the wall of a pipe through which the liquid flows. The temperature of the pipe wall of a pipe is the temperature of the pipe wall, not the temperature of the liquid itself, especially for cryogenic liquids.
LNG is easily affected by atmospheric temperature. For this reason,
As shown in Fig. 1, in order to measure the temperature of cryogenic liquid, a mounting hole is provided in the piping, and a rod-shaped sheath type temperature measuring element 2 housed in the center of the protection tube 1 is inserted through the installation hole to measure the temperature of cryogenic liquid. immerse it in the liquid. Even though the temperature measuring element 2 is in the liquid, it is covered by the protective tube 1 and is not in direct contact with the liquid, but its base end is exposed to the atmosphere and transmits external heat (atmospheric temperature), resulting in a temperature higher than the actual temperature. In order to easily indicate the temperature and to eliminate the influence of external heat on the protective tube 1, it is necessary to set the length of the protective tube 1 immersed in the liquid to be sufficiently long. Further, the protection tube 1 houses the temperature measuring element 2 in the center, and has a large heat capacity, a slow response speed, and a time delay in indicating the true value of the temperature. In this way, the protective tube 1 is interposed between the temperature measuring element 2 and the liquid, and the temperature sensing part 2a of the temperature measuring element 2 is
Since the liquid is not in direct contact with the protective tube, it is necessary to reduce the thermal resistance of the protective tube as much as possible to reduce the temperature difference between the liquid temperature and the temperature sensing part 2a. Furthermore, when measuring extremely low temperature LNG of around -160°C, the influence of cold heat cools the top surface of the mounting flange 3 that fixes the proximal end of the protection tube 1, making it easy for moisture to condense. Terminal head 4 connected above
When reaching the terminal board housed inside, the insulation between the terminals is lost, which tends to cause faulty indications.
また、測温体２の交換をしようとして測温体２
を取り出すと、極低温のLNGが流れている配管
内と大気とが連通しLNGがすぐ気化してしまう。
LNGの流れをバルブ等で遮断することなく測温
体２の鋼管ができることが望まれる。 Also, when trying to replace the temperature sensor 2, the temperature sensor 2
When the LNG is removed, the inside of the pipe in which the cryogenic LNG is flowing communicates with the atmosphere, causing the LNG to immediately vaporize.
It is desired that the steel pipe of the thermometer 2 can be made without blocking the flow of LNG with a valve or the like.
そこで、本考案は上記の事情に鑑み、配管内を
流れる極低温液体のLNGの温度を正確に測定す
べく、棒状のシース型測温体を薄肉の遮蔽筒で覆
つて保護管内に収容して液体内に没入させ、測温
体の交換の時でもLNGと大気とを連通しないよ
うにし、測温体先端の感温部に対向する保護管の
側壁に液体の導入孔を穿設したものである。 Therefore, in view of the above-mentioned circumstances, in order to accurately measure the temperature of the cryogenic liquid LNG flowing inside the pipe, the present invention was developed by covering a rod-shaped sheath type temperature measuring element with a thin shielding tube and housing it in a protection tube. It is immersed in liquid to prevent communication between LNG and the atmosphere even when replacing the temperature sensor, and a liquid introduction hole is drilled in the side wall of the protection tube facing the temperature sensing part at the tip of the temperature sensor. be.
以下、本考案を第２図に基づいて詳細に説明す
る。 Hereinafter, the present invention will be explained in detail based on FIG. 2.
第２図の測温装置は、通常図に向かつて右側を
上方として使用し、配管内を流れる液体をバルブ
等で遮断することなく測温体２の交換を可能とし
たものである。すなわち、取付フランジ３上に基
板１２を載置し、基板１２上面中央に連結管６を
起立させ、連結管６上端にターミナルヘツド４を
取付け、基板１２下端中央に測温体２を垂下状に
して溶接により固着し測温体２を挿通させて端子
盤と接続する。一方、取付フランジ３中央下面に
は前記測温体２を覆い、測温体２を取り出した
際、極低温液体と大気との連通を遮蔽する熱伝導
のよい薄肉の遮蔽筒１３を固着する。基板１２に
取付けた測温体２，連結管６，ターミナルヘツド
４は取付フランジ３にボルト１４により螺締し、
測温体２の交換の際は遮蔽筒１３が配管に取付け
られており極低温液体のLNGと大気とを遮断し
た状態で、ボルトを緩めて取外すことができる。 The temperature measuring device shown in FIG. 2 is normally used with the right side facing upward as viewed from the diagram, and allows the temperature measuring element 2 to be replaced without blocking the liquid flowing in the pipe with a valve or the like. That is, the board 12 is placed on the mounting flange 3, the connecting pipe 6 is erected at the center of the upper surface of the board 12, the terminal head 4 is attached to the upper end of the connecting pipe 6, and the temperature sensing element 2 is placed hanging down at the center of the lower end of the board 12. The thermometer 2 is fixed by welding and connected to the terminal board by inserting the temperature sensor 2 therethrough. On the other hand, a thin shielding tube 13 with good thermal conductivity is fixed to the central lower surface of the mounting flange 3 to cover the temperature measuring element 2 and to block communication between the cryogenic liquid and the atmosphere when the temperature measuring element 2 is taken out. The temperature sensing element 2, connecting pipe 6, and terminal head 4 attached to the board 12 are screwed to the mounting flange 3 with bolts 14.
When replacing the temperature sensing element 2, the shielding tube 13 is attached to the pipe and can be removed by loosening the bolts while blocking the cryogenic liquid LNG from the atmosphere.
本考案は、上述のように、棒状のシース型測温
体２を−160℃程度の極低温の液体内に没入して
測温する極低温液体の測温装置であつて、測温体
２を、測温体２を取り出した際、極低温液体と大
気との連通を遮蔽する薄肉の遮蔽筒１３で覆つて
保護管内５に収容し、保護管５の基端を取付フラ
ンジ３に固着し、取付フランジ３上に装着する基
板１２に取付フランジ３を挿通する測温体２の基
端および遮蔽筒１３の基端を固着し、基板１２上
に連結管６を起立させ、連結管６上端にターミナ
ルヘツド４を取付け、前記測温体２を垂設した基
板１２をボルト１４により取付フランジ３に取付
け取り外し可能とし、測温体２先端の感温部２ａ
に対向する保護管５の側壁に液体の導入孔７を穿
設し、保護管５と遮蔽筒１３との間で感温部２ａ
の上端側と下端側とに断熱性の間材９を介在さ
せ、連結管６に冷熱を防ぐフイン１１を設けた極
低温液体の測温装置であり、測温体を液中に没入
させ、しかも保護管には感温部に対向する箇所に
液体の導入孔が穿設されて感温部は薄肉の遮蔽筒
を介して液体に接触するので、感温部の近傍に位
置する保護管の熱容量に関係なく液体の温度を正
確で応答速度も速く測定できる。また、本考案の
測温体は保護管に収容されているため液体の流れ
により折れ曲がるようなこともない。 As described above, the present invention is a cryogenic liquid temperature measuring device that measures the temperature of a cryogenic liquid by immersing the bar-shaped sheath type temperature measuring element 2 into a cryogenic liquid of about -160°C. When the thermometer 2 is taken out, it is covered with a thin-walled shielding tube 13 that blocks communication between the cryogenic liquid and the atmosphere and housed in the protection tube 5, and the proximal end of the protection tube 5 is fixed to the mounting flange 3. , fix the base end of the temperature sensing element 2 through which the mounting flange 3 is inserted and the base end of the shielding tube 13 to the base plate 12 mounted on the mounting flange 3, make the connecting pipe 6 stand up on the base plate 12, and fix the upper end of the connecting pipe 6. The terminal head 4 is attached to the terminal head 4, and the substrate 12 on which the temperature sensing element 2 is vertically mounted is attached to and detachable from the mounting flange 3 with bolts 14, and the temperature sensing part 2a at the tip of the temperature sensing element 2
A liquid introduction hole 7 is bored in the side wall of the protective tube 5 facing the temperature sensing portion 2a between the protective tube 5 and the shielding tube 13.
This is a temperature measuring device for a cryogenic liquid, in which a heat insulating material 9 is interposed between the upper end side and the lower end side, and a connecting pipe 6 is provided with fins 11 to prevent cold heat. In addition, the protection tube has a liquid introduction hole in a location facing the temperature sensing part, and the temperature sensing part comes into contact with the liquid through a thin shielding tube, so that the protection tube located near the temperature sensing part can The temperature of a liquid can be measured accurately and with a fast response time, regardless of its heat capacity. Furthermore, since the temperature measuring element of the present invention is housed in a protective tube, it will not bend due to the flow of liquid.
さらに、測温体の感温部の上下端側には断熱性
の間材が介在されているので外熱が感温部に伝導
されないばかりか測温部を十分に補強する。保護
管には下部に液体の導入孔が穿設してあるため、
保護管内には液体が充満して常に薄肉の遮蔽筒を
介して感温部と接触している。LNGの極低温液
体の測定の際は冷熱が配管に位置する端子盤まで
伝導し端子間の絶縁がなくなり指示不良を生じ易
いが、連結管にフインを突設しているので、ここ
から冷熱が発散されて端子間で絶縁不良は生じな
い。 Furthermore, since the heat-insulating interlayer is interposed between the upper and lower ends of the temperature-sensing part of the thermometer, external heat is not conducted to the temperature-sensing part, and the temperature-sensing part is sufficiently reinforced. The protection tube has a liquid introduction hole at the bottom, so
The inside of the protective tube is filled with liquid and is always in contact with the temperature sensing part through a thin shielding tube. When measuring cryogenic liquids such as LNG, the cold heat is conducted to the terminal board located in the pipe, and the insulation between the terminals is lost, which tends to cause poor readings. There is no insulation failure between the terminals.
その上、測温体の交換をしようとして測温体を
取り出すと、極低温の−160℃程度のLNGが流れ
ている配管内と大気とが連通しLNGがすぐ気化
してしまうが、遮蔽筒を介在させているので、
LNGと大気とを遮断しており、バルブ等を作動
させることなく自由に測温体の交換が可能で、
LNGの測温装置での問題点が解決でき実用に供
することができる。 Furthermore, if you take out the temperature sensor to replace it, the inside of the pipe where the extremely low temperature of -160℃ LNG is flowing will communicate with the atmosphere, and the LNG will immediately vaporize. Because we are intervening,
The LNG is isolated from the atmosphere, and the temperature sensor can be replaced freely without operating any valves.
The problems with the LNG temperature measuring device can be solved and it can be put into practical use.
第１図は液体の測温装置の縦断面図、第２図は
本考案の具体的実施例の縦断面図である。
２……シース型測温体、４……ターミナルヘツ
ド、１３……遮蔽筒、２ａ……感温部、５……保
護管、７……導入孔、３……取付フランジ、９…
…間材、１２……基板、１１……フイン、６……
連結管。
FIG. 1 is a longitudinal sectional view of a liquid temperature measuring device, and FIG. 2 is a longitudinal sectional view of a specific embodiment of the present invention. 2... Sheath type thermometer, 4... Terminal head, 13... Shield tube, 2a... Temperature sensing part, 5... Protection tube, 7... Introductory hole, 3... Mounting flange, 9...
...Intermediate material, 12...Substrate, 11...Fin, 6...
Connecting pipe.
Claims (1)
温の液体内に没入して測温する極低温液体の測温
装置であつて、測温体２を、測温体２を取り出し
た際、極低温液体と大気との連通を遮蔽する薄肉
の遮蔽筒１３で覆つて保護管５内に収容し、保護
管５の基端および遮蔽筒１３の基端を取付フラン
ジ３に固着し、取付フランジ３上に装着する基板
１２に取付フランジ３を挿通する測温体２の基端
を固着し、基板１２上に連結管６を起立させ、連
結管６上端にターミナルヘツド４を取付け、前記
測温体２を垂設した基板１２をボルト１４により
取付フランジ３に取付け取り外し可能とし、測温
体２先端の感温部２ａに対向する保護管５の側壁
に液体の導入孔７を穿設し、保護管５と遮蔽筒１
３との間で感温部２ａの上端側と下端側とに断熱
性の間材９を介在させ、連結管６に冷熱の伝達を
防ぐフイン１１を設けた極低温液体の測温装置。 This is a cryogenic liquid temperature measuring device that measures the temperature by immersing a rod-shaped sheath type temperature measuring body 2 into a cryogenic liquid of about -160°C, and the temperature measuring body 2 is taken out. At this time, the cryogenic liquid is covered with a thin shielding cylinder 13 that blocks communication between the cryogenic liquid and the atmosphere and housed in the protective tube 5, and the proximal end of the protective tube 5 and the proximal end of the shielding cylinder 13 are fixed to the mounting flange 3, The base end of the temperature sensing element 2 through which the mounting flange 3 is inserted is fixed to the board 12 mounted on the mounting flange 3, the connecting pipe 6 is erected on the board 12, the terminal head 4 is attached to the upper end of the connecting pipe 6, and the A substrate 12 on which the temperature sensor 2 is vertically mounted is attached to the mounting flange 3 with bolts 14 so that it can be removed, and a liquid introduction hole 7 is bored in the side wall of the protective tube 5 facing the temperature sensing part 2a at the tip of the temperature sensor 2. Then, the protection tube 5 and the shielding tube 1
3, a heat insulating interlayer 9 is interposed between the upper end and the lower end of the temperature sensing part 2a, and the connecting pipe 6 is provided with fins 11 to prevent the transfer of cold heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333883U JPS59128539U (en) | 1983-02-18 | 1983-02-18 | Liquid temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333883U JPS59128539U (en) | 1983-02-18 | 1983-02-18 | Liquid temperature measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59128539U JPS59128539U (en) | 1984-08-29 |
| JPH0348508Y2 true JPH0348508Y2 (en) | 1991-10-16 |
Family
ID=30154425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2333883U Granted JPS59128539U (en) | 1983-02-18 | 1983-02-18 | Liquid temperature measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59128539U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4751492B2 (en) * | 2007-11-02 | 2011-08-17 | 三菱重工業株式会社 | thermocouple |
| JP6301570B1 (en) * | 2017-04-27 | 2018-03-28 | 株式会社テイエルブイ | Sensor device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3245260A (en) * | 1962-10-29 | 1966-04-12 | Rosemount Eng Co Ltd | Temperature sensor for high velocity liquid flows |
-
1983
- 1983-02-18 JP JP2333883U patent/JPS59128539U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3245260A (en) * | 1962-10-29 | 1966-04-12 | Rosemount Eng Co Ltd | Temperature sensor for high velocity liquid flows |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59128539U (en) | 1984-08-29 |
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