JPH0527799B2 - - Google Patents
Info
- Publication number
- JPH0527799B2 JPH0527799B2 JP62121263A JP12126387A JPH0527799B2 JP H0527799 B2 JPH0527799 B2 JP H0527799B2 JP 62121263 A JP62121263 A JP 62121263A JP 12126387 A JP12126387 A JP 12126387A JP H0527799 B2 JPH0527799 B2 JP H0527799B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- vacuum
- piping
- exhaust pipe
- exhaust
- 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
- 238000009413 insulation Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 239000001307 helium Substances 0.000 description 5
- 229910052734 helium Inorganic materials 0.000 description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は極低温真空断熱配管に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to cryogenic vacuum insulation piping.
従来、大型ヘリウム液化冷凍システムにおいて
は、冷凍機本体と負荷側を結ぶ真空断熱移送管が
布設されており、この真空断熱移送管の各所に安
全弁を設けて真空断熱移送管からの噴出ガスを屋
外に放出するための配管が建屋に並設されてい
る。真空断熱移送管の真空引の際には前記配管と
は別に真空引き専用の配管を設けて行なうのが普
通であつた。
Conventionally, in large-scale helium liquefaction refrigeration systems, a vacuum insulated transfer pipe is installed that connects the refrigerator main body and the load side, and safety valves are installed at various points on this vacuum insulated transfer pipe to prevent the ejected gas from the vacuum insulated transfer pipe from going outdoors. Pipes are installed in parallel in the building for discharging to the surrounding area. When evacuation of a vacuum insulated transfer tube is carried out, it has been common practice to provide a dedicated evacuation pipe separate from the above-mentioned pipe.
なお、この種の装置に関連するものには、例え
ば、特開昭59−37395号等が挙げられる。 Incidentally, examples related to this type of device include, for example, Japanese Patent Application Laid-Open No. 59-37395.
上記従来技術は、真空断熱移送管の設置および
保守の点について配慮がされておらず、噴出ガス
の排気用の配管の他に真空引きのための配管を有
しており、配管の設置作業および保守が複雑にな
るという問題があつた。
The above conventional technology does not take into consideration the installation and maintenance of the vacuum insulated transfer pipe, and has piping for evacuation in addition to piping for exhausting the ejected gas, and the installation work of the piping and The problem was that maintenance was complicated.
本発明の目的は、配管の設置作業および保守を
容易にすることのできる極低温真空断熱配管を提
供することにある。 An object of the present invention is to provide cryogenic vacuum insulation piping that can facilitate installation and maintenance of the piping.
上記目的は、内管と外管との間に真空層を有す
る真空断熱配管の外管に第１の仕切弁を介して排
気用配管を連結し、排気用配管に第２の仕切弁を
介して真空ポンプを連結するとともに、真空断熱
配管の内管に第３の仕切弁および安全弁を介して
排気用配管と連結することにより、達成される。
The above purpose is to connect the exhaust pipe to the outer pipe of the vacuum insulated pipe having a vacuum layer between the inner pipe and the outer pipe via the first gate valve, and to connect the exhaust pipe to the outer pipe via the second gate valve. This is achieved by connecting a vacuum pump to the vacuum insulating pipe and connecting the inner pipe of the vacuum insulated pipe to the exhaust pipe via a third gate valve and a safety valve.
真空断熱配管を設置し、真空断熱配管の真空層
部を真空排気する場合は、第１および第２の仕切
弁を介して真空層部と排気用配管を連通させ真空
ポンプにより排気用配管内を真空排気することで
行なえ、真空断熱配管により極低温流体等を移送
している場合には、第３の仕切弁を開けて極低温
流体の流れる内管内の圧力が高くなつて安全弁を
介して噴出するガスを排気用配管に流し放出す
る。これにより、真空断熱配管とは別に設置する
配管が少なくなり、配管の設置作業および保守が
容易になる。
When installing vacuum insulation piping and evacuating the vacuum layer part of the vacuum insulation piping, the vacuum layer part and the exhaust piping are communicated through the first and second gate valves, and the inside of the exhaust piping is pumped with a vacuum pump. This can be done by evacuation, and if cryogenic fluid is being transferred through vacuum insulated piping, open the third gate valve to prevent the high pressure in the inner pipe through which the cryogenic fluid flows and eject through the safety valve. The gas flowing through the exhaust pipe is released. This reduces the amount of piping that must be installed separately from the vacuum insulated piping, making installation and maintenance of the piping easier.
以下、本発明の一実施例を第１図により説明す
る。
An embodiment of the present invention will be described below with reference to FIG.
真空断熱配管は、例えば、内管と外管との二重
構造になつており内管と外管との間に真空層を形
成し、例えば、図示しないヘリウム液化冷凍機と
デユワーとの間に設置し、内管にヘリウム液化冷
凍機で生成した液体ヘリウムを通してデユワーに
移送するものであり、この場合は数本の真空断熱
配管１ａ，１ｂが接続されて成つている。真空断
熱配管１ａ，１ｂと併設して排気用配管５を設
け、各真空断熱配管１ａ，１ｂの外管は第１の仕
切弁である仕切弁２ａ，２ｂを介して排気用配管
５と連通し、さらに、各真空断熱配管１ａ，１ｂ
の内管は第３の仕切弁である仕切弁３ａ，３ｂお
よび安全弁４ａ，４ｂを介して排気用配管５と連
通している。排気用配管５には第２の仕切弁であ
る仕切弁６を介して真空ポンプ７が接続してあ
り、この場合、排気用配管５の開放端部に放出口
キヤツプ９が設けてある。８は排気用配管５に設
けた真空計である。なお、放出口キヤツプ９は、
排気用配管５内の圧力により開閉する。 Vacuum insulation piping, for example, has a double structure with an inner tube and an outer tube, and a vacuum layer is formed between the inner tube and the outer tube. The liquid helium produced by the helium liquefaction refrigerator is passed through the inner pipe and transferred to the dewar, and in this case, several vacuum insulation pipes 1a and 1b are connected. An exhaust pipe 5 is provided alongside the vacuum insulated pipes 1a and 1b, and the outer pipe of each vacuum insulated pipe 1a and 1b communicates with the exhaust pipe 5 through gate valves 2a and 2b, which are first gate valves. , Furthermore, each vacuum insulation pipe 1a, 1b
The inner pipe communicates with the exhaust pipe 5 via third gate valves 3a, 3b and safety valves 4a, 4b. A vacuum pump 7 is connected to the exhaust pipe 5 via a gate valve 6, which is a second gate valve, and in this case, a discharge cap 9 is provided at the open end of the exhaust pipe 5. 8 is a vacuum gauge provided in the exhaust pipe 5. In addition, the discharge port cap 9 is
It opens and closes depending on the pressure inside the exhaust pipe 5.
上記構成の極低温真空断熱配管において、真空
断熱配管１ａ，１ｂの初期真空引き時には、仕切
弁２ａ，２ｂおよび仕切弁６を開にし、真空ポン
プ７を作動させ排気用配管５を介して真空断熱配
管１ａ，１ｂの真空層部分の真空排気を行ない、
真空計８を見て、所定の真空度に達したところで
仕切弁２ａ，２ｂを閉じ真空引きを完了する。な
お、このとき仕切弁３ａ，３ｂは閉じておく。ま
た、放出口キヤツプ９は排気用配管５内の圧力が
下がるため閉じた状態となつている。 In the cryogenic vacuum insulation piping having the above configuration, when the vacuum insulation piping 1a, 1b is initially evacuated, the gate valves 2a, 2b and the gate valve 6 are opened, the vacuum pump 7 is operated, and the vacuum insulation is passed through the exhaust piping 5. Evacuate the vacuum layer portions of piping 1a and 1b,
When the vacuum gauge 8 is checked and a predetermined degree of vacuum is reached, the gate valves 2a and 2b are closed to complete evacuation. Note that the gate valves 3a and 3b are closed at this time. Further, the discharge port cap 9 is in a closed state because the pressure inside the exhaust pipe 5 decreases.
また、ヘリウム液化冷凍機を運転して真空断熱
配管１ａ，１ｂ内に液体ヘリウムを流しデユワー
に移送する時には、仕切弁２ａ，２ｂおよび仕切
弁６は閉じておき、仕切弁３ａ，３ｂを開にして
おく。これにより、真空断熱配管１ａ，１ｂの内
管内の圧力が上昇した場合に、噴出ガスが安全弁
４ａ，４ｂを介して排気用配管５に放出され、排
気用配管５内の圧力が上がつて放出口キヤツプ９
が開き、大気中に噴出ガスが放出される。 Furthermore, when operating the helium liquefaction refrigerator to flow liquid helium into the vacuum insulated pipes 1a and 1b and transfer it to the dewar, the gate valves 2a and 2b and the gate valve 6 are closed, and the gate valves 3a and 3b are opened. I'll keep it. As a result, when the pressure inside the vacuum insulated pipes 1a, 1b increases, the ejected gas is released into the exhaust pipe 5 via the safety valves 4a, 4b, the pressure inside the exhaust pipe 5 increases, and the gas is released. Exit cap 9
opens and a jet of gas is released into the atmosphere.
以上、本一実施例によれば、真空断熱配管の真
空引き用の配管と噴出ガスの放出用の配管とを
別々に設ける必要がなく、配管の設置作業および
保守を容易にすることができるという効果があ
る。 As described above, according to the first embodiment, there is no need to provide separate piping for evacuation of the vacuum insulated piping and piping for releasing the blown gas, and the installation work and maintenance of the piping can be facilitated. effective.
本発明によれば、真空断熱配管の初期真空引き
と噴出ガスの放出とを一系列の配管で行なうこと
ができるので、配管の設置作業および保守を容易
にすることができるという効果がある。
According to the present invention, the initial evacuation of the vacuum insulated piping and the discharge of the ejected gas can be carried out in one line of piping, which has the effect of facilitating the installation work and maintenance of the piping.
第１図は本発明の一実施例である極低温真空断
熱配管を示す構成図である。
１ａ，１ｂ……真空断熱配管、２ａ，２ｂ，３
ａ，３ｂ，６……仕切弁、４ａ，４ｂ……安全
弁、５……排気用配管、７……真空ポンプ。
FIG. 1 is a configuration diagram showing a cryogenic vacuum insulation piping according to an embodiment of the present invention. 1a, 1b...Vacuum insulation piping, 2a, 2b, 3
a, 3b, 6...gate valve, 4a, 4b...safety valve, 5...exhaust piping, 7...vacuum pump.
Claims (1)
配管の前記外管に第１の仕切弁を介して排気用配
管を連結し、該排気用配管に第２の仕切弁を介し
て真空ポンプを連結するとともに、前記真空断熱
配管の前記内管に第３の仕切弁および安全弁を介
して前記排気用配管と連結したことを特徴とする
極低温真空断熱配管。1. An exhaust pipe is connected to the outer pipe of the vacuum insulated pipe having a vacuum layer between the inner pipe and the outer pipe via a first gate valve, and an exhaust pipe is connected to the exhaust pipe via a second gate valve. A cryogenic vacuum insulated pipe, characterized in that a vacuum pump is connected thereto, and the inner pipe of the vacuum insulated pipe is connected to the exhaust pipe via a third gate valve and a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62121263A JPS63289397A (en) | 1987-05-20 | 1987-05-20 | Cryogenic vacuum heat-insulating piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62121263A JPS63289397A (en) | 1987-05-20 | 1987-05-20 | Cryogenic vacuum heat-insulating piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63289397A JPS63289397A (en) | 1988-11-25 |
| JPH0527799B2 true JPH0527799B2 (en) | 1993-04-22 |
Family
ID=14806922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62121263A Granted JPS63289397A (en) | 1987-05-20 | 1987-05-20 | Cryogenic vacuum heat-insulating piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63289397A (en) |
-
1987
- 1987-05-20 JP JP62121263A patent/JPS63289397A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63289397A (en) | 1988-11-25 |
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