JP3534571B2 - Double tube for high temperature and high pressure - Google Patents

Double tube for high temperature and high pressure

Info

Publication number
JP3534571B2
JP3534571B2 JP13286597A JP13286597A JP3534571B2 JP 3534571 B2 JP3534571 B2 JP 3534571B2 JP 13286597 A JP13286597 A JP 13286597A JP 13286597 A JP13286597 A JP 13286597A JP 3534571 B2 JP3534571 B2 JP 3534571B2
Authority
JP
Japan
Prior art keywords
gasket
temperature
inner cylinder
pressure
annular
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
Application number
JP13286597A
Other languages
Japanese (ja)
Other versions
JPH10311496A (en
Inventor
光博 入野
豊 今井
也寸志 溝口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP13286597A priority Critical patent/JP3534571B2/en
Publication of JPH10311496A publication Critical patent/JPH10311496A/en
Application granted granted Critical
Publication of JP3534571B2 publication Critical patent/JP3534571B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
  • Thermal Insulation (AREA)
  • Gasket Seals (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、例えば極超音速風
胴の高温高圧用ダクト、さらには製鉄所あるいは化学プ
ラントの大口径高温ダクト等に適用することができる、
高温高圧用2重管に関する。 【0002】 【従来の技術】図4は高温高圧用2重管の適用例を説明
するための極超音速風胴装置の概略平面図、図5は従来
の高温高圧用2重管の要部縦断面図、図6は図5のA部
拡大断面図、図7は図5のB部拡大断面図である。 【0003】まず図4において、極超音速風胴装置の
高温高圧空気源21から開閉弁21aを介して高温高
圧ダクト20へ送られた高温高圧空気は、高温高圧ダク
ト20のT字形分岐管20a、20b毎に設けられた仕
切弁23a,23bを介して、それぞれ風洞22a,
22bへ送られる。各風洞22a,22bから排出され
た排気は、いずれも排気筒24を通して排出される。高
温高圧ダクト20は、例えば900℃の高温と100a
taの高圧の空気を輸送する。 【0004】図5、図6および図7に示すように、例え
ば図4の高温高圧ダクト20のT字形分岐管20a、2
0bとして使用される高温高圧用2重管は、外筒1と、
内筒3および内筒3aとを有する2重管構造となってお
り、外筒1の接続端部にはそれぞれ高圧フランジ2が形
成されているとともに、外筒1と内筒3、3aとの間の
環状の間隙部には、例えばセラミックウール等の断熱材
5が充填されている。 【0005】図5および図6に示すように、内筒3と内
筒3aとの相互隣接部において、内筒3および内筒3a
の熱による軸方向の伸びを吸収することができるよう
に、内筒3と内筒3aとの間には軸方向の間隙13が
形成され、さらに間隙13を中心とする内筒3および内
筒3aの相互隣接部には、それぞれ内筒3および内筒3
aの熱による半径方向の伸びを吸収することができるよ
うにして、内筒3および内筒3aの外周面から半径方向
に環状の間隙14を置いて環状の内筒サポート金具6が
配設されている。 【0006】図5および図7に示すように、外筒1の各
高圧フランジ2の内周側において、内筒3あるいは内筒
3aの端部の熱による軸方向および半径方向の伸びを吸
収することができるようにして、内筒3および内筒3a
の外周面から半径方向に環状の間隙12を置いて環状の
端部サポート金具が配設されている。端部サポート金
の外周面側に内周縁部が一体的に固着された環状の
端部シール金具8の外周縁部は、外筒1の軸方向に見て
表裏両面側から環状の端部シール用ガスケット11aに
より挟持された状態で、環状の端部当板9により外筒1
の環状肩部に嵌合した状態で押さえ付けられるようにし
て、締付ビス10により外筒1側に固定されている。 【0007】 【発明が解決しようとする課題】高温高圧ダクト20の
T字形分岐管20a、20bのような高温高圧用2重管
においては、外筒1に伸縮継手を採用することは、高圧
のため困難であり、外筒1に2つ割れ構造を採用するこ
とも、高圧に対する強度が不足したり、製作費が嵩んだ
りする等の観点から難しいため、組立上の容易性も考え
て、従来は、上述のように、外筒1と内筒3との間の熱
による伸び率の相違を、随所に間隙12、13、14を
形成することにより逃す構造とされていた。そして、昇
温時間の短縮のため、外筒1と、内筒3および3aとの
間には、シール機能を持たないセラミックウール等の断
熱材5が充填されていた。 【0008】しかし、従来の高温高圧ダクト20のT字
形分岐管20a、20bのような高温高圧用2重管を、
例えば900°Cの温度、100ataの圧力の下で使
用した場合、外筒1の温度が許容温度250°Cを大
巾に越えるという局所的過熱が発生する。その原因は、
900°Cの高温ガスが、図6および図7において点線
矢印で示したように、T字形分岐管20a、20bに設
けられた間隙12、13および14から、綿状のセラミ
ックウール等の断熱材5中へと漏出して、外筒1に直接
接触するためと推定される。 【0009】そこで本発明は、高温ガスによる局所的な
高温加熱を防止することができるようにし、しかも製作
や組立を容易に行なうことができるようにした高温高圧
用2重管を提供しようとするものである。 【0010】 【課題を解決するための手段】上述の課題を解決するた
め、本発明の高温高圧用2重管は、高温高圧用2重管に
おける内管相互の接続部が継手により接続され、同内管
と外管との間の環状の間隙を封止する部位における上記
外管の内周面側には環状のガスケットホルダの外周部が
固定され、上記ガスケットホルダの内周面側には環状の
肩部が形成されているとともに、同肩部には上記内管の
外周面に滑り接触をするようにして環状の滑り接触ガス
ケットが嵌入され、同滑り接触ガスケットが、上記ガス
ケットホルダの外側面との間に端部シール用ガスケット
を介して当該ガスケットホルダ側に圧接され固定された
ガスケット押さえの内周縁部に形成された押圧部によ
り、上記ガスケットホルダの上記肩部の壁面側に押圧さ
れ固定されていることを特徴としている。 【0011】 【発明の実施の形態】以下、図面により本発明の実施の
形態について説明する。図1は本発明の1実施の形態に
係る高温高圧用2重管の要部縦断面図、図2は図1のA
部拡大断面図、図3は図1のB部拡大断面図である。 【0012】図1ないし図3において、高温高圧用2重
管は、外筒1と、内筒3および内筒3aとを有する2重
管構造となっており、外筒1の接続端部にはそれぞれ高
圧フランジ2が形成されているとともに、外筒1と内筒
3、3aとの間の環状の間隙部には、例えばセラミック
ウールの外、多層金属薄膜性断熱材、耐火レンガ、耐火
モルタル等の断熱材から選択された断熱材5が充填され
ている。 【0013】高温高圧用2重管の内管3、3a相互の接
続部は、図1および図2に示したように、継手としての
環状の内ねじ式内筒サポート金具15により接続され、
さらに内管3、3aと外管1との間の環状の間隙を封止
する滑り接触ガスケット16が、内管3、3aの外周面
および外管1の内周面のうち少なくとも一方の周面、例
えば図1および図3に示したように、内管3、3aの外
周面に対して滑り接触をしている。 【0014】図1および図2において、内筒3に接続さ
れる内筒3aの接続端部の外周面上に、継手としての内
ねじ式内筒サポート金具15の基端側の内周面が嵌合さ
れた状態で、内ねじ式内筒サポート金具15の基端側が
内筒3aの接続端部の外周面上に溶接され、さらに、内
ねじ式内筒サポート金具15の先端側の内周面には内ね
じが形成されているとともに、内筒3の接続端部の外周
面上には外ねじが形成されていて、内ねじ式内筒サポー
ト金具15の先端側の内周面上の内ねじが、内筒3の接
続端部の外周面上の外ねじに螺合されていることによ
り、内筒3と内筒3aとが相互に接続されている。 【0015】内筒3aを組付ける際には、内筒3の接続
端部の外周面上にあらかじめ外ねじを形成しておき、接
続端部の外周面上に内ねじ式内筒サポート金具15が溶
接された内筒3aを外筒1内に挿入した後、内筒3aを
中心軸線周りに回転させることにより、内ねじ式内筒サ
ポート金具15を介して、内筒3aを内筒3に接続す
る。その結果、局所過熱の最大原因である内筒3と内筒
3aとの間の間隙を無くすることが可能となる。 【0016】図1および図3において、外筒1の端部に
形成された高圧フランジ2の内周側における環状の最内
肩部には、環状のガスケットホルダ17の外周側フラン
ジ部がガスケットホルダ用ビス18により固定されてい
る。ガスケットホルダ17の内周側肩部には、例えばセ
ラミック製の環状の滑り接触ガスケット16が内筒3あ
るいは内筒3aの外周面に対して滑り接触をするように
して保持されている。滑り接触ガスケット16は、ガス
ケットホルダ17の外面との間に端部シール用ガスケッ
ト11を介してガスケットホルダ17側に圧接されるガ
スケット押さえ19の内周縁部に形成された環状の突縁
部により、ガスケットホルダ17の内周側肩部の壁面上
に押圧されている。ガスケット押さえ19は、同ガスケ
ット押さえ19の外周側において、環状の端部シール用
ガスケット11を介して環状の端部当板9により外筒1
の中間肩部壁面側に押さえ付けられており、端部当板9
は、締付ビス10により、外筒1の最外肩部の壁面上に
締付けられて、固定されている。 【0017】以上のように、高温高圧用2重管の内管
3、3a相互の接続部は、図1および図2に示したよう
に、継手としての環状の内ねじ式内筒サポート金具15
により接続され、さらに内管3、3aと外管1との間の
環状の間隙を封止するガスケット16が、内管3、3a
の外周面および外管1の内周面のうち少なくとも一方の
周面、例えば図1および図3に示したように、内管3、
3aの外周面に対して滑り接触をしているので、高温ガ
スが内筒3、3a側から外筒1側へと漏洩するのを極力
抑制することができ、また内筒3および3aの伸びと、
外筒1の伸びとの間の伸び差は、例えばセラミック製の
滑り接触ガスケット16と、内管3、3aの外周面およ
び外管1の内周面のうち少なくとも一方の周面、例えば
内筒3、3aの外表面との滑りによる、内筒3および内
筒3aの外筒1の軸方向への自由伸びによって吸収され
る。 【0018】図1ないし図3においては、本発明の高温
高圧用2重管としてT字形分岐管について説明したが、
本発明の高温高圧用2重管は、他の任意の形状の高温高
圧用2重管、例えば直管ダクトよりなる高温高圧用2重
管にも適用することができる。 【0019】 【発明の効果】以上のように、本発明の高温高圧用2重
管によれば、高温高圧用2重管における内管相互の接続
部が継手により接続され、同内管と外管との間の環状の
間隙を封止する部位における上記外管の内周面側には環
状のガスケットホルダの外周部が固定され、上記ガスケ
ットホルダの内周面側には環状の肩部が形成されている
とともに、同肩部には上記内管の外周面に滑り接触をす
るようにして環状の滑り接触ガスケットが嵌入され、同
滑り接触ガスケットが、上記ガスケットホルダの外側面
との間に端部シール用ガスケットを介して当該ガスケッ
トホルダ側に圧接され固定されたガスケット押さえの内
周縁部に形成された押圧部により、上記ガスケットホル
ダの上記肩部の壁面側に押圧され固定されているので、
軸方向に隣接する内管相互管に内管の熱伸びを吸収する
ための間隙を形成する必要がなく、内管相互は継手によ
り接続され、高温ガスが内管側から内管と外管との間の
間隙部内へと漏出することがなく、そのため高温ガスに
よる外管側の局所的な高温加熱を防止することができ、
また内管の外周面および外管の内周面のうち少なくとも
一方の周面に対して滑り接触をするガスケットの作用に
より、高温ガスが内管側から内管と外管との間の間隙部
内へと流入することがない状態で、内管と外管との間の
熱伸び差が無理なく吸収され、しかも、高温高圧用2重
管の構造が簡素な構造となり、製作や組立が容易とな
る。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applicable to, for example, high-temperature and high-pressure ducts of hypersonic wind tunnels, and large-diameter high-temperature ducts of steelworks or chemical plants. Can,
The present invention relates to a double pipe for high temperature and high pressure. 2. Description of the Related Art FIG. 4 is a schematic plan view of a hypersonic wind tunnel apparatus for explaining an application example of a high-temperature and high-pressure double pipe, and FIG. 5 is a main part of a conventional high-temperature and high-pressure double pipe. FIG. 6 is an enlarged sectional view of a part A in FIG. 5, and FIG. 7 is an enlarged sectional view of a part B in FIG. First , in FIG. 4, high-temperature and high-pressure air sent from a high-temperature and high-pressure air source 21 of a hypersonic wind tunnel device to a high-temperature and high-pressure duct 20 via an on- off valve 21a is divided into a T-shaped branch of the high-temperature and high-pressure duct 20. tube 20a, the gate valve 23a provided for each 20b, via 23b, respectively, wind tunnel 22a,
22b. The exhaust gas discharged from each of the wind tunnels 22a and 22b is discharged through the exhaust pipe 24. The high-temperature high-pressure duct 20 has a high temperature of 900 ° C.
The high pressure air of ta is transported. [0004] As shown in FIGS. 5, 6 and 7, for example T-shaped branch pipe 20a of the high-temperature high-pressure duct 20 in FIG. 4, 2
The high-temperature and high-pressure double pipe used as 0b has an outer cylinder 1 and
It has a double-pipe structure having an inner cylinder 3 and an inner cylinder 3a. A high-pressure flange 2 is formed at a connection end of the outer cylinder 1 and a connection between the outer cylinder 1 and the inner cylinders 3 and 3a. The annular gap therebetween is filled with a heat insulating material 5 such as ceramic wool. [0005] As shown in FIGS. 5 and 6, the inner cylinder 3 and the inner cylinder 3 a are located adjacent to each other between the inner cylinder 3 and the inner cylinder 3 a.
To be able to absorb the extension of heat by axial, between the inner cylinder 3a and the inner cylinder 3, the gap 13 in the axial direction is formed, the inner cylinder 3 and the inner further around the gap 13 The inner cylinder 3 and the inner cylinder 3
In order to be able to absorb the elongation in the radial direction due to the heat of a, an annular inner cylinder support fitting 6 is disposed radially from the outer peripheral surfaces of the inner cylinder 3 and the inner cylinder 3a with an annular gap 14 therebetween. ing. As shown in FIGS. 5 and 7, on the inner peripheral side of each high-pressure flange 2 of the outer cylinder 1, axial and radial expansion due to heat of the end of the inner cylinder 3 or the inner cylinder 3a is absorbed. So that the inner cylinder 3 and the inner cylinder 3a
An annular end support member 7 is disposed at an annular gap 12 in the radial direction from the outer peripheral surface of the annular support member 7 . The outer peripheral edge of the annular end seal member 8, whose inner peripheral edge is integrally fixed to the outer peripheral surface side of the end support member 7 , is annular from the front and back sides as viewed in the axial direction of the outer cylinder 1. The outer cylinder 1 is held by the annular end contact plate 9 while being sandwiched by the sealing gasket 11a.
Is fixed to the outer cylinder 1 side by a tightening screw 10 so as to be pressed down in a state of being fitted to the annular shoulder portion. In a high-temperature and high-pressure double pipe such as the T-shaped branch pipes 20a and 20b of the high-temperature and high-pressure duct 20, the use of an expansion joint in the outer cylinder 1 requires a high-pressure high-pressure pipe. Therefore, it is difficult to adopt a two-split structure for the outer cylinder 1 and it is difficult from the viewpoint of insufficient strength against high pressure and an increase in manufacturing cost. Conventionally, as described above, a structure in which the difference in the elongation rate due to heat between the outer cylinder 1 and the inner cylinder 3 is eliminated by forming gaps 12, 13, and 14 everywhere. Then, in order to shorten the heating time, the space between the outer cylinder 1 and the inner cylinders 3 and 3a is filled with a heat insulating material 5 such as ceramic wool having no sealing function. However, a high-temperature and high-pressure double pipe such as the T-shaped branch pipes 20a and 20b of the conventional high-temperature and high-pressure duct 20 is used.
For example a temperature of 900 ° C, when used under a pressure of 100 ata, the temperature of the outer tube 1, local overheating occurs that exceeds the permitted temperature 250 ° C by a large margin. The cause is
As shown by the dotted arrows in FIGS. 6 and 7, a high-temperature gas of 900 ° C. is supplied from the gaps 12, 13 and 14 provided in the T-shaped branch pipes 20a and 20b to a heat insulating material such as cotton-like ceramic wool. It is presumed that the fluid leaks into the inner cylinder 5 and comes into direct contact with the outer cylinder 1. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a high-temperature and high-pressure double tube capable of preventing local high-temperature heating by a high-temperature gas and capable of easily performing manufacture and assembly. Things. [0010] In order to solve the above-mentioned problems, a high-temperature and high-pressure double pipe according to the present invention is replaced with a high- temperature and high-pressure double pipe.
Connecting portions of the inner tube mutually definitive are connected by joints, the at the site for sealing an annular gap between the same inner and outer tubes
The outer circumference of the annular gasket holder is on the inner circumference of the outer pipe.
The gasket holder is fixed, and an annular
A shoulder is formed, and the shoulder is
An annular sliding contact gas that makes sliding contact with the outer peripheral surface
The sliding contact gasket fits the gas
Gasket for sealing the end between the outer surface of the holder and the holder
Is pressed into contact with the gasket holder side via
Pressing parts formed on the inner peripheral edge of the gasket retainer
And press against the shoulder wall surface of the gasket holder.
It is characterized by being fixed . Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a high-temperature and high-pressure double pipe according to an embodiment of the present invention, and FIG.
FIG. 3 is an enlarged sectional view of a part B in FIG. In FIG. 1 to FIG. 3, the double pipe for high temperature and high pressure has a double pipe structure having an outer cylinder 1, an inner cylinder 3 and an inner cylinder 3a. Each of them has a high-pressure flange 2 formed therein, and an annular gap between the outer cylinder 1 and the inner cylinders 3 and 3a is provided with, for example, ceramic wool, a multilayer metal thin film heat insulating material, a fire brick, a fire mortar, and the like. The heat insulating material 5 selected from such heat insulating materials is filled. As shown in FIGS. 1 and 2, the connection between the inner pipes 3 and 3a of the high-temperature and high-pressure double pipe is connected by an annular inner-screw type inner cylinder support fitting 15 as a joint.
Further, a sliding contact gasket 16 for sealing an annular gap between the inner pipes 3 and 3a and the outer pipe 1 is provided on at least one of the outer peripheral face of the inner pipes 3 and 3a and the inner peripheral face of the outer pipe 1. For example, as shown in FIGS. 1 and 3, the outer pipes 3 and 3a are in sliding contact with the outer peripheral surfaces of the inner pipes 3 and 3a. In FIGS. 1 and 2, on the outer peripheral surface of the connection end of the inner cylinder 3a connected to the inner cylinder 3, the inner peripheral surface on the proximal end side of the inner screw type inner cylinder support fitting 15 as a joint is provided. In the fitted state, the base end side of the inner screw type inner cylinder support fitting 15 is welded to the outer peripheral surface of the connection end of the inner cylinder 3a, and further, the inner circumference of the distal end side of the inner screw type inner cylinder support fitting 15 An inner thread is formed on the surface, and an outer thread is formed on the outer peripheral surface of the connection end of the inner cylinder 3. The inner cylinder 3 and the inner cylinder 3a are connected to each other by being screwed into the outer thread on the outer peripheral surface of the connection end of the inner cylinder 3. When assembling the inner cylinder 3a, an external thread is formed on the outer peripheral surface of the connection end of the inner cylinder 3 in advance, and the inner screw type inner cylinder support fitting 15 is formed on the outer peripheral surface of the connection end. After inserting the welded inner cylinder 3a into the outer cylinder 1, the inner cylinder 3a is rotated around the central axis to thereby connect the inner cylinder 3a to the inner cylinder 3 via the inner screw type inner cylinder support fitting 15. Connecting. As a result, it is possible to eliminate the gap between the inner cylinder 3 and the inner cylinder 3a, which is the largest cause of local overheating. In FIGS. 1 and 3, an outermost flange portion of an annular gasket holder 17 is provided on the innermost shoulder portion of the annular portion on the inner peripheral side of the high-pressure flange 2 formed at the end of the outer cylinder 1. It is fixed by the screw 18 for use. An annular sliding contact gasket 16 made of, for example, ceramic is held on the inner peripheral shoulder of the gasket holder 17 so as to make sliding contact with the outer peripheral surface of the inner cylinder 3 or the inner cylinder 3a. The sliding contact gasket 16 has an annular projection formed on the inner peripheral edge of a gasket retainer 19 pressed against the gasket holder 17 via the end sealing gasket 11 between the gasket holder 17 and the outer surface of the gasket holder 17. The gasket holder 17 is pressed onto the inner peripheral shoulder wall surface. The gasket retainer 19 is provided on the outer peripheral side of the gasket retainer 19 by the annular end contact plate 9 via the annular end seal gasket 11.
Of the end shoulder plate 9
Is fastened and fixed to the outermost shoulder wall surface of the outer cylinder 1 by a fastening screw 10. As described above, the connection between the inner pipes 3 and 3a of the high-temperature and high-pressure double pipe is, as shown in FIGS. 1 and 2, an annular inner-screw type inner cylinder support fitting 15 as a joint.
And a gasket 16 that seals the annular gap between the inner pipes 3 and 3a and the outer pipe 1
At least one of the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube 1, for example, as shown in FIGS.
Since the outer cylinder 3a is in sliding contact with the outer peripheral surface of the inner cylinder 3, the leakage of the high-temperature gas from the inner cylinder 3, 3a side to the outer cylinder 1 side can be suppressed as much as possible. When,
An elongation difference between the elongation of the outer tube 1 and the elongation of the outer tube 1 is determined, for example, by a sliding contact gasket 16 made of ceramic and at least one of the outer surfaces of the inner tubes 3 and 3a and the inner surface of the outer tube 1, for example, the inner tube. It is absorbed by the free extension of the inner cylinder 3 and the inner cylinder 3a in the axial direction of the outer cylinder 1 due to sliding with the outer surfaces of the outer cylinders 3 and 3a. 1 to 3, a T-shaped branch pipe has been described as a double pipe for high temperature and high pressure according to the present invention.
The high-temperature and high-pressure double pipe of the present invention can be applied to a high-temperature and high-pressure double pipe having any other shape, for example, a high-temperature and high-pressure double pipe formed of a straight pipe duct. As described above, according to the high-temperature and high-pressure double pipe of the present invention, the connection between the inner pipes in the high-temperature and high-pressure double pipe is connected by the joint, and the inner pipe and the outer pipe are connected. A ring is provided on the inner peripheral surface side of the outer tube at a portion for sealing the annular gap between the outer tube and the tube.
The outer periphery of the gasket holder is fixed,
An annular shoulder is formed on the inner peripheral surface side of the socket holder
At the same time, the shoulder makes sliding contact with the outer peripheral surface of the inner pipe.
The annular sliding contact gasket is inserted
The sliding contact gasket is located on the outer surface of the gasket holder.
Through the gasket for sealing the end.
Of the gasket retainer pressed against and fixed to the holder
The gasket holder is pressed by the pressing portion formed on the periphery.
Because it is pressed and fixed on the wall side of the above shoulder of the da ,
There is no need to form a gap between the inner pipes adjacent to each other in the axial direction to absorb the thermal elongation of the inner pipes, the inner pipes are connected by joints, and hot gas flows from the inner pipe side to the inner pipe and the outer pipe. Without leaking into the gap between them, so that local high-temperature heating of the outer tube side by high-temperature gas can be prevented,
In addition, by the action of the gasket that makes a sliding contact with at least one of the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube, high-temperature gas flows from the inner tube side into the gap between the inner tube and the outer tube. In this state, the difference in thermal expansion between the inner tube and the outer tube is absorbed without difficulty, and the structure of the high-temperature and high-pressure double tube is simple, making it easy to manufacture and assemble. Become.

【図面の簡単な説明】 【図1】本発明の実施の形態に係る高温高圧用2重管
の要部縦断面図である。 【図2】図1のA部拡大断面図である。 【図3】図1のB部拡大断面図である。 【図4】高温高圧用2重管の適用例を説明するための極
超音速風胴装置の概略平面図である。 【図5】従来の高温高圧用2重管の要部縦断面図であ
る。 【図6】図5のA部拡大断面図である。 【図7】図7は、図5のB部拡大断面図である。 【符号の説明】 1 外筒 2 高圧フランジ 3,3a 内筒 5 セラミックウール等の断熱材 6 内筒サポート金具 7 端部サポート金具 8 端部シール金具 9 端部当板 10 締付ビス 11,11a 端部シール用ガスケット 12,13、14 間隙 15 継手としての内ネジ式内筒サポート金具 16 滑り接触ガスケット 17 ガスケットホルダ 18 ガスケットホルダ用ビス 19 ガスケット押さえ 20 高温高圧ダクト 20a,20b T字型分岐管 21 高温高圧空気源 21a 開閉弁 22a,22b 風洞 23a,23b 仕切弁 24 排気筒
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view of a main part of a double pipe for high temperature and high pressure according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a portion A in FIG. FIG. 3 is an enlarged sectional view of a portion B in FIG. 1; FIG. 4 is a schematic plan view of a hypersonic wind tunnel device for explaining an application example of a double pipe for high temperature and high pressure. FIG. 5 is a longitudinal sectional view of a main part of a conventional double pipe for high temperature and high pressure. FIG. 6 is an enlarged sectional view of a portion A in FIG. 5; FIG. 7 is an enlarged sectional view of a portion B in FIG. 5; [Description of Signs] 1 Outer cylinder 2 High-pressure flange 3, 3a Inner cylinder 5 Insulation material such as ceramic wool 6 Inner cylinder support fitting 7 End support fitting 8 End sealing fitting 9 End holding plate 10 Tightening screws 11, 11a End seal gaskets 12, 13, 14 Gap 15 Inner screw type inner cylinder support fitting 16 as joint 16 Sliding contact gasket 17 Gasket holder 18 Gasket holder screw 19 Gasket retainer 20 High temperature and high pressure duct 20a, 20b T-shaped branch pipe 21 High-temperature / high-pressure air source 21a On-off valve 22a, 22b Wind tunnel 23a, 23b Gate valve 24 Exhaust pipe

フロントページの続き (56)参考文献 特開 昭56−55791(JP,A) 特開 昭62−188895(JP,A) 特開 平5−52295(JP,A) 実開 昭56−30695(JP,U) (58)調査した分野(Int.Cl.7,DB名) F16L 59/14 F16J 15/06 G01M 9/04 Continuation of the front page (56) References JP-A-56-55791 (JP, A) JP-A-62-188895 (JP, A) JP-A-5-52295 (JP, A) Jpn. , U) (58) Field surveyed (Int. Cl. 7 , DB name) F16L 59/14 F16J 15/06 G01M 9/04

Claims (1)

(57)【特許請求の範囲】 【請求項1】 高温高圧用2重管における内管相互の接
続部が継手により接続され、同内管と外管との間の環状
の間隙を封止する部位における上記外管の内周面側には
環状のガスケットホルダの外周部が固定され、上記ガス
ケットホルダの内周面側には環状の肩部が形成されてい
るとともに、同肩部には上記内管の外周面に滑り接触を
するようにして環状の滑り接触ガスケットが嵌入され、
同滑り接触ガスケットが、上記ガスケットホルダの外側
面との間に端部シール用ガスケットを介して当該ガスケ
ットホルダ側に圧接され固定されたガスケット押さえの
内周縁部に形成された押圧部により、上記ガスケットホ
ルダの上記肩部の壁面側に押圧され固定されていること
を特徴とする、高温高圧用2重管。
(57) [Claims 1] The connection between the inner pipes of the double pipe for high temperature and high pressure is connected by a joint, and seals the annular gap between the inner pipe and the outer pipe. On the inner surface of the outer tube
The outer periphery of the annular gasket holder is fixed and the gas
An annular shoulder is formed on the inner peripheral side of the
At the same time, make sliding contact with the outer peripheral surface of the inner pipe at the shoulder.
So that the annular sliding contact gasket is fitted,
The sliding contact gasket is on the outside of the above gasket holder
Between the gasket and the surface
Of the gasket retainer pressed against and fixed to the holder
By the pressing portion formed on the inner peripheral edge, the gasket
A high-temperature and high-pressure double pipe, which is pressed and fixed to a wall surface of the shoulder of the rudder .
JP13286597A 1997-05-07 1997-05-07 Double tube for high temperature and high pressure Expired - Lifetime JP3534571B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13286597A JP3534571B2 (en) 1997-05-07 1997-05-07 Double tube for high temperature and high pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13286597A JP3534571B2 (en) 1997-05-07 1997-05-07 Double tube for high temperature and high pressure

Publications (2)

Publication Number Publication Date
JPH10311496A JPH10311496A (en) 1998-11-24
JP3534571B2 true JP3534571B2 (en) 2004-06-07

Family

ID=15091360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13286597A Expired - Lifetime JP3534571B2 (en) 1997-05-07 1997-05-07 Double tube for high temperature and high pressure

Country Status (1)

Country Link
JP (1) JP3534571B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519704A (en) * 2011-11-08 2012-06-27 中国科学院力学研究所 Pulse wind tunnel thermal jet flow experiment gas source feed platform

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112595483B (en) * 2020-12-08 2022-09-20 中国空气动力研究与发展中心设备设计及测试技术研究所 Thermal structure wind tunnel speed type flow field adjusting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519704A (en) * 2011-11-08 2012-06-27 中国科学院力学研究所 Pulse wind tunnel thermal jet flow experiment gas source feed platform

Also Published As

Publication number Publication date
JPH10311496A (en) 1998-11-24

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