JPH117844A - Insulated pipe and spacer for insulated pipe - Google Patents
Insulated pipe and spacer for insulated pipeInfo
- Publication number
- JPH117844A JPH117844A JP9173099A JP17309997A JPH117844A JP H117844 A JPH117844 A JP H117844A JP 9173099 A JP9173099 A JP 9173099A JP 17309997 A JP17309997 A JP 17309997A JP H117844 A JPH117844 A JP H117844A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- spacer
- pipe
- cylindrical body
- tube
- 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.)
- Granted
Links
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 31
- 239000011810 insulating material Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920003319 Araldite® Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002449 FKM Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Thermal Insulation (AREA)
- Insulated Conductors (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
(57)【要約】
【課題】 極低温ケーブルなどに用いる断熱管におい
て、断熱管内を真空排気する際、長手方向の排気経路を
十分に確保して真空引きを容易にする。
【解決手段】 波付け内外管１，２の間に断熱材３とス
ペーサ４とを具え、この内外管１，２の間を真空に保持
する断熱管である。このスペーサ４は、複数の円筒体５
を所定間隔で平行に並べて帯状体６で一体化したもの
で、前記内管１の外周に螺旋状に巻回され、この円筒体
５は内外管１，２の軸方向沿いに配置されている。
(57) [Problem] To evacuate the inside of a heat insulating pipe in a heat insulating pipe used for a cryogenic cable or the like by sufficiently securing an exhaust path in a longitudinal direction to facilitate evacuation. SOLUTION: The heat insulating tube is provided with a heat insulating material 3 and a spacer 4 between corrugated inner and outer tubes 1 and 2, and maintains a vacuum between the inner and outer tubes 1 and 2. The spacer 4 includes a plurality of cylindrical bodies 5.
Are arranged in parallel at predetermined intervals and integrated by a band-shaped body 6, which is spirally wound around the outer circumference of the inner pipe 1, and the cylindrical body 5 is arranged along the axial direction of the inner and outer pipes 1 and 2. .
Description
【０００１】[0001]
【発明の属する技術分野】本発明は極低温ケーブルや冷
媒輸送管の断熱などに好適な断熱管と、断熱管用スペー
サに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating pipe suitable for heat insulation of a cryogenic cable or a refrigerant transport pipe and a spacer for the heat insulating pipe.
【０００２】[0002]
【従来の技術】極低温ケーブルなどの断熱管として、図
５に示すものが知られている（実公昭53-51426号公報参
照）。これは波付け内管11と波付け外管12との間に積層
断熱層13を配置し、両管11,12 の間を真空に構成する断
熱管である。2. Description of the Related Art As a heat insulating tube for a cryogenic cable or the like, the one shown in FIG. This is a heat-insulating tube in which a laminated heat-insulating layer 13 is disposed between a corrugated inner tube 11 and a corrugated outer tube 12, and a vacuum is formed between the two tubes 11, 12.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の断熱管
では真空引きの際、排気経路は内外管の波付け溝に沿っ
た螺旋状となるため、長手方向に沿った経路が確保され
ない。特に断熱管を長尺化した場合、内外管の波付けピ
ッチを小さくした場合、断熱管の直径を大きくした場合
には排気経路が著しく長大化する。真空引きの効率は排
気経路長に反比例するため、従来の断熱管では極めて排
気効率が悪い。However, in the above-mentioned heat insulating tube, the evacuation path is spiral along the corrugated grooves of the inner and outer pipes when evacuation is performed, so that a path along the longitudinal direction cannot be secured. In particular, when the heat insulating pipe is lengthened, when the corrugated pitch of the inner and outer pipes is reduced, and when the diameter of the heat insulating pipe is increased, the exhaust path becomes significantly longer. Since the efficiency of evacuation is inversely proportional to the length of the evacuation path, the evacuation efficiency of a conventional heat insulating pipe is extremely low.
【０００４】従って、本発明の主目的は、内外管の間に
長手方向の排気経路を確保して真空引きを容易にすると
共に、内外管を同軸に保持できる断熱管と断熱管用スペ
ーサとを提供することにある。Accordingly, it is a main object of the present invention to provide a heat insulating pipe and a heat insulating pipe spacer capable of securing a longitudinal exhaust path between the inner and outer pipes to facilitate the evacuation and holding the inner and outer pipes coaxially. Is to do.
【０００５】[0005]
【課題を解決するための手段】本発明断熱管は上記の目
的を達成するもので、その特徴は、波付け内外管の間に
断熱材とスペーサとを具え、この内外管の間を真空に保
持する断熱管において、前記スペーサは、複数の円筒体
を所定間隔で平行に並べて帯状体で一体化したもので、
前記内管の外周に螺旋状に巻回され、この円筒体は内外
管の軸方向沿いに配置されたことを特徴とする。The heat insulating tube of the present invention achieves the above-mentioned object, and is characterized in that a heat insulating material and a spacer are provided between corrugated inner and outer tubes, and a vacuum is applied between the inner and outer tubes. In the heat-insulating pipe to be held, the spacer is formed by integrating a plurality of cylindrical bodies in parallel at predetermined intervals and integrating them with a band-like body,
The cylindrical body is spirally wound around the outer periphery of the inner tube, and is arranged along the axial direction of the inner and outer tubes.
【０００６】ここで、スペーサを配置する位置は、内管
と外管の間であればどこでもよい。すなわち、内管の上
にスペーサを巻回し、その上に断熱材を配置してもよ
く、逆に内管の上に断熱材を配置し、その上にスペーサ
を巻回してもよい。[0006] The spacer may be located anywhere between the inner tube and the outer tube. That is, a spacer may be wound on the inner tube and a heat insulating material may be arranged thereon, or conversely, a heat insulating material may be arranged on the inner tube and the spacer may be wound thereon.
【０００７】また、上記断熱管に用いられる本発明スペ
ーサは、複数の円筒体を所定間隔で平行に並べ、これら
を帯状体で一体化し、各円筒体は帯状体の長手方向に対
して傾斜を有することを特徴とする。In the spacer according to the present invention used for the heat insulating pipe, a plurality of cylinders are arranged in parallel at a predetermined interval, and these are integrated by a band, and each cylinder is inclined with respect to the longitudinal direction of the band. It is characterized by having.
【０００８】このスペーサの材料は、帯状体，円筒体共
にガス放出の少ない材料で構成することが好適である。
すなわち、ガス放出率が１０-2(Pa・m3/s・m2)以下の材料
が好ましい。この構成により真空引きの効率を向上し、
内外管の間の真空度の維持に効果的である。ガス放出の
少ない材料の具体例としては、鉄，ステンレス，鉛，
銅，アルミ，ステアタイト，バイトン，アラルダイトな
どの金属や、フッ素樹脂＜ポリテトラフルオルエチレン
＞，ポリスチロール，ポリ塩化ビニル，ネオプレン，ポ
リアミド系樹脂などの合成ゴム・樹脂、その他ガラスな
どが挙げられる。なお、種々の物質のガス放出率に関す
る文献としては、「真空技術」，堀越，東大出版，1994
がある。The material of the spacer is preferably made of a material that emits little gas for both the band and the cylinder.
That is, a material having a gas release rate of 10 −2 (Pa · m 3 / s · m 2 ) or less is preferable. This configuration improves the efficiency of evacuation,
It is effective for maintaining the degree of vacuum between the inner and outer tubes. Specific examples of materials with low outgassing are iron, stainless steel, lead,
Metals such as copper, aluminum, steatite, viton, and araldite, and synthetic rubbers and resins such as fluororesins <polytetrafluoroethylene>, polystyrene, polyvinyl chloride, neoprene, and polyamide resins, and other glass, etc. . References relating to the outgassing rates of various substances include “Vacuum technology”, Horikoshi, Tokyo University Press, 1994.
There is.
【０００９】帯状体の構成は排気経路確保の点からネッ
ト状とすることが好適である。帯状体と円筒体との一体
化は、接着剤による接着などが挙げられる。[0009] It is preferable that the configuration of the belt-like body is a net shape from the viewpoint of securing the exhaust path. The integration of the band and the cylinder includes bonding with an adhesive.
【００１０】スペーサに用いる円筒体は中空円筒，中実
円筒のいずれでもよい。中空円筒の方が排気経路も確保
し易い上、軽量である点で望ましい。また、円筒体の外
径は、断熱管の内外管の間を十分に保持できる程度とす
る。円筒体の長さは内管または外管の波付けピッチの５
倍から１０倍とすることで、断熱管を曲げた際に円筒体
が屈曲して断熱材を損傷することを防止できる。The cylindrical body used for the spacer may be a hollow cylinder or a solid cylinder. A hollow cylinder is desirable in that it is easier to secure an exhaust path and is lighter in weight. Further, the outer diameter of the cylindrical body is set to an extent that the space between the inner and outer tubes of the heat insulating tube can be sufficiently held. The length of the cylinder is 5 times the corrugated pitch of the inner or outer tube.
By setting the number of times to 10 times, it is possible to prevent the cylindrical body from bending and damaging the heat insulating material when the heat insulating pipe is bent.
【００１１】帯状体の長手方向に対する円筒体の傾斜角
度は、スペーサを巻回した際に、円筒体が内外管の軸方
向に沿うように決定する。この傾斜角度は帯状体の幅と
スペーサを巻回する箇所の直径および巻付ピッチで決定
される。The inclination angle of the cylindrical body with respect to the longitudinal direction of the strip is determined so that the cylindrical body is along the axial direction of the inner and outer tubes when the spacer is wound. The angle of inclination is determined by the width of the band, the diameter of the portion where the spacer is wound, and the winding pitch.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図１は本発明断熱管の透視模式図，図２は同断熱
管の横断面図である。本発明断熱管は、波付け内管１と
波付け外管２との間に積層断熱材３とスペーサ４を配置
し、両管１，２の間を真空に保持するものである。Embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view of the heat insulating tube of the present invention, and FIG. 2 is a cross-sectional view of the heat insulating tube. In the heat insulating tube of the present invention, a laminated heat insulating material 3 and a spacer 4 are arranged between a corrugated inner tube 1 and a corrugated outer tube 2 to maintain a vacuum between both tubes 1 and 2.
【００１３】内管１および外管２はアルミ合金材で構成
される。内管１の内周には、超電導ケーブルのコア（図
示せず）などが内蔵され、内管１の外周には積層断熱材
３が巻回されている。この積層断熱材３は、通常、アル
ミ蒸着フィルムやガラステープなどを積層したものが用
いられる。The inner tube 1 and the outer tube 2 are made of an aluminum alloy material. A core (not shown) of a superconducting cable and the like are built in the inner periphery of the inner tube 1, and a laminated heat insulating material 3 is wound around the outer periphery of the inner tube 1. As the laminated heat insulating material 3, a laminated material of an aluminum vapor-deposited film, a glass tape, or the like is usually used.
【００１４】この断熱材３と外管２との間に本発明スペ
ーサ４が配置される。その平面図を図３に示す。このス
ペーサ４は複数の円筒体５を所定間隔で平行に配列し、
これらをネット状の帯状体６で一体化して構成される。
帯状体６はガラスネットを用い、円筒体はガラスパイプ
を用いる。円筒体５はその両端部を帯状体６の両側縁に
合わせ、かつ帯状体６の長手方向に対して一定の角度θ
をもって固定されている。この角度θはスペーサを断熱
材３の外周に巻回したとき、各円筒体５が内外管１，２
の軸方向に沿うように（図１参照）設定されている。円
筒体５の配列間隔ｔは、スペーサ４を巻回したときに円
筒体５が周方向を８等分するような間隔とした（図２参
照）。この間隔ｔはスペーサを巻回したときに内外管
１，２を同軸に保持できる程度とすればよい。なお、円
筒体５の長さは外管２の波付けピッチの２倍程度とし
た。The spacer 4 of the present invention is disposed between the heat insulating material 3 and the outer tube 2. The plan view is shown in FIG. The spacer 4 has a plurality of cylindrical bodies 5 arranged in parallel at predetermined intervals.
These are integrated by a net-shaped strip 6.
The band 6 uses a glass net, and the cylindrical body uses a glass pipe. The cylindrical body 5 has its both ends aligned with both side edges of the band 6, and has a constant angle θ with respect to the longitudinal direction of the band 6.
It is fixed with. This angle θ is such that when the spacer is wound around the outer periphery of the heat insulating material 3, each cylindrical body 5
(See FIG. 1). The arrangement interval t of the cylinders 5 was set such that the cylinder 5 divided the circumferential direction into eight equal parts when the spacer 4 was wound (see FIG. 2). The interval t may be set to such an extent that the inner and outer tubes 1 and 2 can be held coaxially when the spacer is wound. The length of the cylindrical body 5 was about twice the corrugated pitch of the outer tube 2.
【００１５】このような構成とすることで、内外管１，
２を同軸に保持すると共に、断熱管の長手方向に排気経
路を確保することができる。すなわち、各円筒体５の間
に長手方向に連続する空間が形成され、真空引きの際に
十分な排気経路を確保することができる。With such a configuration, the inner and outer tubes 1,
2 can be held coaxially, and an exhaust path can be secured in the longitudinal direction of the heat insulating tube. That is, a space that is continuous in the longitudinal direction is formed between the cylindrical bodies 5, and a sufficient exhaust path can be secured during evacuation.
【００１６】また、断熱管を曲げたときでも円筒体５が
屈曲して断熱材を損傷させることもない。さらに、この
ような構成のスペーサは、巻回するだけで容易に設置が
できるため、スペーサの装着作業に特別の熟練を要せ
ず、短時間の装着が可能である。Further, even when the heat insulating pipe is bent, the cylindrical body 5 does not bend and the heat insulating material is not damaged. Furthermore, since the spacer having such a configuration can be easily installed simply by winding the spacer, the spacer can be mounted in a short time without any special skill in mounting the spacer.
【００１７】以下に従来の断熱管と本発明断熱管とを真
空引きする際の排気コンダクタンスの計算例を示す。従
来の断熱管では、図４（Ａ）に示すように、外管12と断
熱材13の間に形成された螺旋状の空間を分子流が流れる
ものとし、この空間を直径Ｄの螺旋管路に近似するとＤ
は式１で表される。 Ｄ≒２√（δＰ／２π） …式１ δ＝波付け管の谷部の深さ、Ｐ＝波付けピッチ また、管路１ｍ当りの流路の長さＬは式２で表される。 Ｌ≒πｄ（１００／Ｐ） …式２ ｄ＝螺旋管路の直径 そして、円管コンダクタンスＶは、 Ｖ＝６５Ｄ3 ／（Ｌ√Ｍ） …式３ Ｍ≒２９（空気分子量） で表されるため、式３に式１と式２を代入し、δ＝０．
６(cm)，Ｐ＝２０(cm)，ｄ＝１０(cm)，Ｌ＝１００(cm)
を代入すると管路１ｍ当りのコンダクタンスＶは０．３
０８(l/mim）となる。A calculation example of the exhaust conductance when the conventional heat insulating pipe and the heat insulating pipe of the present invention are evacuated will be described below. In a conventional heat insulating tube, as shown in FIG. 4A, a helical space formed between the outer tube 12 and the heat insulating material 13 is assumed to flow a molecular flow. Approximate to D
Is represented by Equation 1. D {2} (δP / 2π) Equation 1 δ = depth of the valley of the corrugated pipe, P = corrugated pitch Further, the length L of the flow path per 1 m of the pipe is expressed by Equation 2. L ≒ πd (100 / P) Expression 2 d = diameter of spiral channel V = 65D 3 / (L√M) Expression 3 M ≒ 29 (air molecular weight) Therefore, by substituting Equations 1 and 2 into Equation 3, δ = 0.
6 (cm), P = 20 (cm), d = 10 (cm), L = 100 (cm)
And the conductance V per meter of pipe is 0.3
08 (l / mim).
【００１８】一方、本発明断熱管では、次の円心筒管の
式によりコンダクタンスＶを求める。 Ｖ＝１０3 α（Ｄ1 −Ｄ2 ）2 （Ｄ1 ＋Ｄ2 ）／４８Ｌ
π√Ｍ ここに、外管最内径Ｄ1 ＝１１．５(cm)，内管最外径Ｄ
2 ＝９．９(cm)，α＝１．５，Ｌ＝１００(cm)を代入す
ると管路１ｍ当りのコンダクタンスＶは６０．７(l/mi
m）となる。このように、本発明断熱管の方が十分大き
な排気経路を確保できていることが計算上でも確認でき
る。On the other hand, in the heat insulating tube of the present invention, the conductance V is obtained by the following equation of the cylindrical tube. V = 10 3 α (D 1 −D 2 ) 2 (D 1 + D 2 ) / 48L
π√M where the outer diameter of the outer tube D 1 = 11.5 (cm), the outer diameter of the inner tube D
Substituting 2 = 9.9 (cm), α = 1.5, and L = 100 (cm), the conductance V per meter of pipe is 60.7 (l / mi).
m). As described above, it can be confirmed by calculation that the heat insulating pipe of the present invention can secure a sufficiently large exhaust path.
【００１９】[0019]
【発明の効果】以上説明したように、本発明の断熱管に
よれば、内外管を同軸に保持できると共に、長手方向の
排気経路を確保することができ、効率よく真空引きを行
うことができる。また、本発明スペーサは本発明断熱管
を構成するのに最適である。As described above, according to the heat insulating pipe of the present invention, the inner and outer pipes can be held coaxially, the exhaust path in the longitudinal direction can be secured, and the evacuation can be performed efficiently. . Further, the spacer of the present invention is most suitable for constituting the heat insulating tube of the present invention.
【図１】本発明断熱管の構成を示す透視模式図。FIG. 1 is a schematic perspective view showing a configuration of a heat insulating tube of the present invention.
【図２】本発明断熱管の横断面図。FIG. 2 is a cross-sectional view of the heat insulating tube of the present invention.
【図３】本発明スペーサの平面図。FIG. 3 is a plan view of the spacer of the present invention.
【図４】（Ａ）は従来の断熱管における波付け管と断熱
材部分の縦断面図、（Ｂ）は従来の断熱管における排気
経路を示す模式図。FIG. 4A is a vertical cross-sectional view of a corrugated pipe and a heat insulating material part in a conventional heat insulating pipe, and FIG. 4B is a schematic view showing an exhaust path in the conventional heat insulating pipe.
【図５】従来の断熱管の部分断面図。FIG. 5 is a partial sectional view of a conventional heat insulating tube.
１ 内管 ２ 外管 ３ 断熱材 ４ スペーサ ５ 円筒体 ６ 帯状体 DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Outer pipe 3 Insulation material 4 Spacer 5 Cylindrical body 6 Belt
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石井 英雄 神奈川県横浜市鶴見区江ヶ崎４番１号 東 京電力株式会社電力技術研究所内 (72)発明者 本庄 昇一 神奈川県横浜市鶴見区江ヶ崎４番１号 東 京電力株式会社電力技術研究所内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideo Ishii 4-1 Egasaki, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture, Tokyo Electric Power Research Institute (72) Inventor Shoichi Honjo, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture No. 4-1, Kasaki Tokyo Electric Power Company
Claims (4)
を具え、この内外管の間を真空に保持する断熱管におい
て、 前記スペーサは、複数の円筒体を所定間隔で平行に並べ
て帯状体で一体化したもので、前記内管の外周に螺旋状
に巻回され、 この円筒体は内外管の軸方向沿いに配置されたことを特
徴とする断熱管。1. A heat insulating pipe comprising a heat insulating material and a spacer between corrugated inner and outer pipes, and maintaining a vacuum between the inner and outer pipes, wherein the spacer comprises a plurality of cylindrical bodies arranged in parallel at predetermined intervals in a strip shape. A heat insulating pipe, wherein the cylindrical body is spirally wound around the outer circumference of the inner pipe, and the cylindrical body is arranged along the axial direction of the inner and outer pipes.
５倍から１０倍としたことを特徴とする請求項１記載の
断熱管。2. The heat insulating pipe according to claim 1, wherein the length of the cylindrical body is set to be 5 to 10 times the corrugated pitch of the inner and outer pipes.
これらを帯状体で一体化し、各円筒体は帯状体の長手方
向に対して傾斜を有することを特徴とする断熱管用スペ
ーサ。3. A plurality of cylinders are arranged in parallel at predetermined intervals,
These are integrated by a band, and each cylindrical body is inclined with respect to the longitudinal direction of the band.
ス放出率が１０-2(Pa・m3/s・m2)以下であることを特徴と
する請求項３記載の断熱管用スペーサ。4. The heat insulating tube spacer according to claim 3, wherein the material forming the band and the cylinder has a gas release rate of 10 −2 (Pa · m 3 / s · m 2 ) or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17309997A JP3597015B2 (en) | 1997-06-12 | 1997-06-12 | Insulated pipe and spacer for insulated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17309997A JP3597015B2 (en) | 1997-06-12 | 1997-06-12 | Insulated pipe and spacer for insulated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH117844A true JPH117844A (en) | 1999-01-12 |
| JP3597015B2 JP3597015B2 (en) | 2004-12-02 |
Family
ID=15954169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17309997A Expired - Lifetime JP3597015B2 (en) | 1997-06-12 | 1997-06-12 | Insulated pipe and spacer for insulated pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3597015B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794896A (en) * | 1987-11-06 | 1989-01-03 | Industrial Technology Research Institute | Lubricating device for two-stroke engine |
| JP2009074657A (en) * | 2007-09-21 | 2009-04-09 | Hokkaido Univ | Cryogenic fluid transfer pipe |
| CN109935415A (en) * | 2019-02-25 | 2019-06-25 | 顺科新能源技术股份有限公司 | A portable charging gun structure with cooling function |
| KR102567698B1 (en) * | 2023-02-22 | 2023-08-18 | 영진아이엔디(주) | Plasma scrubber having insulation structure on the inner surface of the reaction chamber and method for manufacturing the same |
-
1997
- 1997-06-12 JP JP17309997A patent/JP3597015B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794896A (en) * | 1987-11-06 | 1989-01-03 | Industrial Technology Research Institute | Lubricating device for two-stroke engine |
| JP2009074657A (en) * | 2007-09-21 | 2009-04-09 | Hokkaido Univ | Cryogenic fluid transfer pipe |
| CN109935415A (en) * | 2019-02-25 | 2019-06-25 | 顺科新能源技术股份有限公司 | A portable charging gun structure with cooling function |
| KR102567698B1 (en) * | 2023-02-22 | 2023-08-18 | 영진아이엔디(주) | Plasma scrubber having insulation structure on the inner surface of the reaction chamber and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3597015B2 (en) | 2004-12-02 |
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