JP3673309B2 - High pressure piping connection device - Google Patents

High pressure piping connection device Download PDF

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Publication number
JP3673309B2
JP3673309B2 JP26310495A JP26310495A JP3673309B2 JP 3673309 B2 JP3673309 B2 JP 3673309B2 JP 26310495 A JP26310495 A JP 26310495A JP 26310495 A JP26310495 A JP 26310495A JP 3673309 B2 JP3673309 B2 JP 3673309B2
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Japan
Prior art keywords
connection
fitting
pressure
diameter portion
receiving surface
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JP26310495A
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Japanese (ja)
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JPH09105484A (en
Inventor
良彦 今中
健二 千葉
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Sakura Rubber Co Ltd
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Sakura Rubber Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/006—Screw-threaded joints; Forms of screw-threads for such joints with straight threads
    • F16L15/008—Screw-threaded joints; Forms of screw-threads for such joints with straight threads with sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
    • F16L41/10—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe the extremity of the pipe being screwed into the wall

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、気体、液体等の高圧流体を輸送する高圧配管の接続装置に関する。
【０００２】
【従来の技術】
例えば、航空、宇宙産業の油圧、燃料系統において、機器相互間を高温、高圧または超低温の流体を輸送する場合に高圧の金属配管および高圧ホースが多く用いられている。この高圧ホースは、ブレード、ジャケット等の複数層の外層の内周面に高分子材料からなる内層がライニングされている。金属配管および高圧ホースの端部には継手金具が設けられ、この継手金具を機器に設けられた接続金具に接続できるようになっている。
【０００３】
図４は8000psi ラインに使用されている従来の高圧配管の接続装置を示すもので、１は圧力容器等の隔壁であり、この隔壁１の一部には接続ポート２が穿設されている。この接続ポート２は隔壁１の外側に開口する大径部３と隔壁１の内側に開口する小径部４とからなる段付き孔に形成され、前記小径部４の内周面にはＯリング受け部５ａを残して雌ねじ部５が形成されている。
【０００４】
６は接続金具であり、この金具本体７の基端部には前記雌ねじ部５にねじ込まれる固定ねじ部８が設けられ、先端部には前記継手金具が接続される接続ねじ部９が設けられている。固定ねじ部８の上部にはＯリング１０が装着される環状溝１１が設けられている。接続ねじ部９の下部には縦溝１２が刻設され、この縦溝１２には内周面に縦溝（図示しない）を有するロックリング１３が軸方向に移動自在に嵌合され、このロックリング１３の外周面には縦溝形状のロック歯１４が刻設されている。
【０００５】
そして、隔壁１の接続ポート２に接続金具６を取り付ける場合には、環状溝１１にＯリング１０を装着し、固定ねじ部８を雌ねじ部５にねじ込み、Ｏリング１０をＯリング受け部５ａに圧接して接続ポート２に対して金具本体７を漏洩ゼロの状態に固定する。次に、縦溝１２に噛合しているロックリング１３を治具（図示しない）を用いて接続ポート２の大径部３に軸方向に押し込むと、ロックリング１３のロック歯１４が大径部３の内周面に食い込み、ロックリング１３を介して金具本体７は隔壁一に対して回転不能にロックされる。
【０００６】
したがって、金具本体７のロックリング１３とからなる接続金具６は隔壁１に対して固定され、8000psi ラインに使用しても漏洩ゼロに保持することができる。
【０００７】
【発明が解決しようとする課題】
しかしながら、前述した従来の高圧配管の接続装置は、接続ポート２にねじ込んだ金具本体７の回り止めのためのロックリング１３を設けた複雑な構造であり、またロックリング１３を接続ポート２の大径部３の内周面に食い込ませるために専用の治具が必要となる。さらに、8000psi ラインに使用しても漏洩ゼロに維持するためにはＯリング１０を定期的に交換する必要があるが、その度に専用治具が必要となり、交換作業が煩わしいという事情がある。
【０００８】
この発明は、前記事情に着目してなされたもので、その目的とするところは、接続金具の構造の簡素化を図ることができ、軽量でしかも特殊な治具を用いることなく着脱でき、Ｏリングの交換作業も容易に行うことができる高圧配管の接続装置を提供することにある。
【０００９】
【課題を解決するための手段】
この発明は、前述した目的を達成するために、請求項１は、圧力容器等の隔壁に設けられた接続ポートに接続金具を接続し、この接続金具に高圧配管を装着する高圧配管の接続装置において、前記接続ポートを隔壁の外側に開口する大径部と隔壁の内側に開口する小径部とからなる段付き孔に形成し、前記大径部の内周面に雌ねじ部を設けるとともに、大径部と小径部との段部にバネ受け面を設け、前記接続金具に前記雌ねじ部にねじ込まれる雄ねじ部を形成するとともに、この雄ねじ部の端部に前記バネ受け面に対して弾性的に圧接する皿バネ状のシール部を一体に設けたことを特徴とする。
【００１０】
請求項２は、圧力容器等の隔壁に設けられた接続ポートに接続金具を接続し、この接続金具に高圧配管を装着する高圧配管の接続装置において、前記接続ポートを隔壁の外側に開口し、その開口縁にＯリング受け面を有した大径部と隔壁の内側に開口する小径部とからなる段付き孔に形成し、前記大径部の内周面に雌ねじ部を設けるとともに、大径部と小径部との段部にバネ受け面を設け、前記接続金具に前記Ｏリング受け面に弾性的に圧接するＯリングを嵌合するとともに、前記雌ねじ部にねじ込まれる雄ねじ部を形成し、この雄ねじ部の端部に前記バネ受け面に対して弾性的に圧接する皿バネ状のシール部を一体に設けたことを特徴とする。
【００１１】
請求項３は、前記皿バネ状のシール部を、断面が横向きＵ字状で、内圧によって拡開してバネ受け面に対して圧接する形状であることを特徴とする。
請求項４は、前記接続金具の金具本体の外周部にナット部を一体に有し、金具本体とナット部とで形成される角部でＯリングを支持することを特徴とする。
【００１２】
請求項１によれば、接続金具に一体に設けた皿バネ状のシール部によって確実にシールでき、請求項２によれば、皿バネ状のシール部とＯリングとの二重シールによって一層確実にシールできる。
【００１３】
【発明の実施の形態】
以下、この発明の一実施の形態を図面に基づいて説明する。
図１は高圧配管の接続装置の一部断面した側面図、図２は接続金具の斜視図、図３は高圧配管の接続装置の使用状態の一部断面した側面図である。
【００１４】
図中２１は、例えば、航空、宇宙産業の油圧、燃料機器としての圧力容器等の隔壁であり、この隔壁２１の一部には接続ポート２２が穿設されている。この接続ポート２２は隔壁２１の外側に開口する大径部２３と隔壁２１の内側に開口する小径部２４とからなる段付き孔に形成されている。
【００１５】
大径部２３の開口縁にはテーパ形状のＯリング受け面２５が設けられ、大径部２３の底部にはテーパ形状のバネ受け面２６が設けられている。さらに、大径部２３の内周面には雌ねじ部２７が形成されている。
【００１６】
２８は例えばチタン等の靭性の高い材料からなる接続金具であり、この接続金具２８の基端部には前記雌ねじ部２７にねじ込まれる固定ねじ部２９が設けられ、先端部には後述する継手金具が接続される接続ねじ部３０が設けられている。なお、接続ねじ部３０の形状は本実施形態に限定されるものではなく、継手金具の形式によって適宜変更可能である。さらに、接続金具２８の中間部にはフランジ状に突出してナット部３１が一体に設けられ、このナット部３１の下面における金具本体との角部にＯリング３２が支持される。
【００１７】
また、接続金具２８の固定ねじ部２９より先端面には皿バネ状のシール部３３が一体に設けられている。このシール部３３は断面が横向きＵ字状で肉薄に形成され、接続金具２８の内腔を流通する高圧流体の流通路２８ａに向って開口する環状のポケット部３３ａを有している。そして、このシール部３３は流通路２８ａの内圧によって拡開してバネ受け面２６に対して圧接するようになっている。
【００１８】
そして、隔壁２１の接続ポート２２に接続金具２８を取り付ける場合には、まず、バネ受け面２６および固定ねじ部２９に固形潤滑剤を塗布するが、この固形潤滑剤は材質、脱着の頻度により必要に応じて塗布すればよく、塗布しなくても機能上問題はない。また、ナット部３１の下面における金具本体との角部にＯリング３２を支持し、接続金具２８をそのシール部３３側から接続ポート２２に挿入してナット部３１をスパナ等の普通工具によって回して固定ねじ部２９を雌ねじ部２７にねじ込む。
【００１９】
接続金具２８の固定ねじ部２９を雌ねじ部２７にさらにねじ込むと、シール部３３がバネ受け面２６に弾性的に圧接するとともに、Ｏリング３２がＯリング受け面２５に圧接する。したがって、接続金具２８は接続ポート２２に対して二重シール構造で装着される。
【００２０】
しかも、シール部３３は前述したように、断面が横向きＵ字状で、接続金具２８の内腔を流通する高圧流体の流通路２８ａに向って開口する環状のポケット部３３ａを有しているために、シール部３３は流通路２８ａの内圧によって拡開してバネ受け面２６に対して圧接し、シール性が向上し、接続ポート２２に対して接続金具２８を漏洩ゼロの状態に固定することができる。
【００２１】
隔壁２１に接続金具２８を取り付けた後、接続金具２８の接続ねじ部３０に高圧配管３４に設けられた継手金具３５をねじ込み固定することにより、高圧配管３４を圧力容器と接続することができる。したがって、航空、宇宙産業の油圧、燃料機器等のように、8000psi ラインに使用しても漏洩ゼロの状態に維持することができる。
【００２２】
また、高圧流体として高温、高圧あるいは超低温の流体の輸送用として使用した場合、Ｏリング３２が熱や物性の影響を受けて劣化することがあり、定期的にＯリング３２を交換する必要が生じるが、接続金具２８にナット部３１が一体に設けられているために、スパナ等の普通工具によって接続金具２８を回して固定ねじ部２９を雌ねじ部２７から取り外すことができ、Ｏリング３２の交換作業が容易に行える。また、接続金具２８を取り外しても、シール部３３は接続金具２８と一体であるため、紛失、装着忘れの心配もなく、信頼性を向上できる。
【００２３】
なお、本実施形態によれば、シール部３３とＯリング３２との二重シール構造としたが、Ｏリング３２は必ずしも設ける必要がなく、シール部３３だけでも十分にシール性を維持できる。
また、高圧配管の接続装置は、航空、宇宙産業に限定されるものではなく、車両、工作機械、家電関係などの広範囲の技術分野に応用できる。
【００２４】
【発明の効果】
以上説明したように、この発明の請求項１によれば、接続金具の構造の簡素化を図ることができ、軽量でしかも特殊な治具を用いることなく着脱でき、Ｏリング等の交換作業、保守点検も容易に行うことができる。さらに、シール部は流通路の内圧によって拡開してバネ受け面に対して圧接し、シール性が向上し、漏洩ゼロの状態に維持できるという効果がある。
請求項２によれば、Ｏリングと皿バネ状のシール部との二重シール構造となり、一層確実なシールが得られる。
【図面の簡単な説明】
【図１】この発明の一実施形態の高圧配管の接続装置の一部断面した側面図。
【図２】同実施形態の接続金具の斜視図。
【図３】同実施形態の高圧配管の接続装置の使用状態の一部断面した側面図。
【図４】従来の高圧配管の接続装置の一部断面した側面図。
【符号の説明】
２１…隔壁
２２…接続ポート
２３…大径部
２４…小径部
２５…Ｏリング受け面
２６…バネ受け面
２７…雌ねじ部
２８…接続金具
３２…Ｏリング
３３…シール部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting device for high-pressure piping for transporting a high-pressure fluid such as gas or liquid.
[0002]
[Prior art]
For example, in the hydraulic and fuel systems of the aviation and space industries, high-pressure metal piping and high-pressure hoses are often used when transporting high-temperature, high-pressure, or ultra-low temperature fluids between devices. In this high-pressure hose, an inner layer made of a polymer material is lined on the inner peripheral surface of a plurality of outer layers such as a blade and a jacket. A joint fitting is provided at the end of the metal pipe and the high-pressure hose, and the joint fitting can be connected to a connection fitting provided in the equipment.
[0003]
FIG. 4 shows a conventional high-pressure pipe connecting device used for the 8000 psi line. Reference numeral 1 denotes a partition such as a pressure vessel, and a connection port 2 is formed in a part of the partition 1. The connection port 2 is formed in a stepped hole including a large diameter portion 3 that opens to the outside of the partition wall 1 and a small diameter portion 4 that opens to the inside of the partition wall 1, and an O-ring receiving member is formed on the inner peripheral surface of the small diameter portion 4. The female screw part 5 is formed leaving the part 5a.
[0004]
Reference numeral 6 denotes a connection fitting, and a fixing screw portion 8 to be screwed into the female screw portion 5 is provided at a base end portion of the fitting main body 7, and a connection screw portion 9 to which the joint fitting is connected is provided at a distal end portion. ing. An annular groove 11 in which an O-ring 10 is mounted is provided on the upper portion of the fixing screw portion 8. A vertical groove 12 is formed in the lower portion of the connecting screw portion 9, and a lock ring 13 having a vertical groove (not shown) on its inner peripheral surface is fitted into the vertical groove 12 so as to be movable in the axial direction. On the outer peripheral surface of the ring 13, vertical groove-shaped lock teeth 14 are engraved.
[0005]
When the connection fitting 6 is attached to the connection port 2 of the partition wall 1, the O-ring 10 is attached to the annular groove 11, the fixing screw portion 8 is screwed into the female screw portion 5, and the O-ring 10 is attached to the O-ring receiving portion 5a. The metal fitting body 7 is fixed to the connection port 2 in a state of zero leakage by pressure contact. Next, when the lock ring 13 meshed with the longitudinal groove 12 is axially pushed into the large diameter portion 3 of the connection port 2 using a jig (not shown), the lock teeth 14 of the lock ring 13 become the large diameter portion. 3, the metal fitting body 7 is locked to the partition wall 1 through the lock ring 13 so as not to rotate.
[0006]
Therefore, the connection fitting 6 composed of the lock ring 13 of the fitting body 7 is fixed to the partition wall 1 and can be kept at zero leakage even when used in the 8000 psi line.
[0007]
[Problems to be solved by the invention]
However, the above-described conventional high-pressure piping connection device has a complicated structure in which a lock ring 13 is provided to prevent the metal fitting body 7 screwed into the connection port 2 from rotating. A special jig is required to bite into the inner peripheral surface of the diameter portion 3. Further, in order to maintain zero leakage even when used in the 8000 psi line, it is necessary to periodically replace the O-ring 10, but a dedicated jig is necessary each time, and there is a situation that the replacement work is troublesome.
[0008]
The present invention has been made paying attention to the above circumstances, and the object of the present invention is to simplify the structure of the connection fitting, which is lightweight and detachable without using a special jig. An object of the present invention is to provide a high-pressure piping connection device that can easily perform a ring replacement operation.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a high-pressure pipe connection device in which a connection fitting is connected to a connection port provided in a partition wall such as a pressure vessel, and a high-pressure pipe is attached to the connection fitting. The connection port is formed in a stepped hole having a large diameter portion that opens to the outside of the partition wall and a small diameter portion that opens to the inside of the partition wall, and an internal thread portion is provided on the inner peripheral surface of the large diameter portion. A spring receiving surface is provided at the step portion of the diameter portion and the small diameter portion, and a male screw portion to be screwed into the female screw portion is formed on the connection fitting, and an end portion of the male screw portion is elastically formed with respect to the spring receiving surface. A disc spring-like seal portion that is in pressure contact is provided integrally.
[0010]
Claim 2 is a high-pressure pipe connection device in which a connection fitting is connected to a connection port provided in a partition wall such as a pressure vessel, and a high-pressure pipe is attached to the connection fitting, and the connection port is opened to the outside of the partition wall. Formed in a stepped hole consisting of a large-diameter portion having an O-ring receiving surface at the opening edge and a small-diameter portion opening inside the partition, and provided with a female screw portion on the inner peripheral surface of the large-diameter portion, A spring receiving surface is provided at the step portion of the portion and the small diameter portion, an O-ring that is elastically pressed against the O-ring receiving surface is fitted to the connection fitting, and a male screw portion that is screwed into the female screw portion is formed, A disc spring-like seal portion that elastically presses against the spring receiving surface is integrally provided at an end portion of the male screw portion.
[0011]
A third aspect of the present invention is characterized in that the disc spring-like seal portion has a U-shaped cross section and is expanded by an internal pressure so as to be in pressure contact with the spring receiving surface.
According to a fourth aspect of the present invention, a nut portion is integrally formed on an outer peripheral portion of the fitting main body of the connection fitting, and an O-ring is supported by a corner portion formed by the fitting main body and the nut portion.
[0012]
According to the first aspect of the present invention, it is possible to surely seal by the disc spring-shaped seal portion provided integrally with the connection fitting, and according to the second aspect, the double seal of the disc spring-shaped seal portion and the O-ring further ensures the seal. Can be sealed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a partially sectional side view of a connecting device for high-pressure piping, FIG. 2 is a perspective view of a connection fitting, and FIG. 3 is a partially sectional side view of a connecting device for high-pressure piping.
[0014]
In the figure, reference numeral 21 denotes a partition wall such as a pressure vessel as a hydraulic or fuel device for the aviation and space industries. A connection port 22 is formed in a part of the partition wall 21. The connection port 22 is formed in a stepped hole including a large diameter portion 23 that opens to the outside of the partition wall 21 and a small diameter portion 24 that opens to the inside of the partition wall 21.
[0015]
A tapered O-ring receiving surface 25 is provided at the opening edge of the large diameter portion 23, and a tapered spring receiving surface 26 is provided at the bottom of the large diameter portion 23. Further, an internal thread portion 27 is formed on the inner peripheral surface of the large diameter portion 23.
[0016]
Reference numeral 28 denotes a connection fitting made of a material having high toughness such as titanium. A fixing screw portion 29 to be screwed into the female screw portion 27 is provided at the base end portion of the connection fitting 28, and a joint fitting described later is provided at the distal end portion. The connection screw part 30 to which is connected is provided. In addition, the shape of the connection thread part 30 is not limited to this embodiment, It can change suitably with the form of a coupling metal fitting. Further, a nut portion 31 is integrally provided at the intermediate portion of the connection fitting 28 so as to project in a flange shape, and an O-ring 32 is supported at a corner portion of the lower surface of the nut portion 31 with the fitting main body.
[0017]
In addition, a disc spring-like seal portion 33 is integrally provided on the distal end surface of the connection fitting 28 from the fixing screw portion 29. The seal portion 33 has a U-shaped cross-section and is thin, and has an annular pocket portion 33 a that opens toward the flow passage 28 a of the high-pressure fluid that flows through the lumen of the connection fitting 28. The seal portion 33 expands by the internal pressure of the flow passage 28a and comes into pressure contact with the spring receiving surface 26.
[0018]
When attaching the connection fitting 28 to the connection port 22 of the partition wall 21, first, a solid lubricant is applied to the spring receiving surface 26 and the fixing screw portion 29. This solid lubricant is necessary depending on the material and the frequency of desorption. However, there is no problem in function even if it is not applied. Further, an O-ring 32 is supported at a corner portion of the lower surface of the nut portion 31 with the metal fitting body, the connection fitting 28 is inserted into the connection port 22 from the seal portion 33 side, and the nut portion 31 is rotated with a common tool such as a spanner. Then, the fixing screw portion 29 is screwed into the female screw portion 27.
[0019]
When the fixing screw portion 29 of the connection fitting 28 is further screwed into the female screw portion 27, the seal portion 33 is elastically pressed against the spring receiving surface 26 and the O-ring 32 is pressed against the O-ring receiving surface 25. Therefore, the connection fitting 28 is attached to the connection port 22 with a double seal structure.
[0020]
Moreover, as described above, the seal portion 33 has a U-shaped cross section and has an annular pocket portion 33a that opens toward the flow passage 28a of the high-pressure fluid that circulates in the lumen of the connection fitting 28. In addition, the seal portion 33 is expanded by the internal pressure of the flow passage 28 a and is pressed against the spring receiving surface 26, improving the sealing performance, and fixing the connection fitting 28 to the connection port 22 in a state of zero leakage. Can do.
[0021]
After the connection fitting 28 is attached to the partition wall 21, the high-pressure pipe 34 can be connected to the pressure vessel by screwing and fixing a joint fitting 35 provided on the high-pressure pipe 34 to the connection screw portion 30 of the connection fitting 28. Therefore, it can be kept at zero leakage even when used in the 8000 psi line, such as in the aviation and space industry hydraulics and fuel equipment.
[0022]
Further, when the high-pressure fluid is used for transporting a high-temperature, high-pressure or ultra-low temperature fluid, the O-ring 32 may be deteriorated due to the influence of heat or physical properties, and the O-ring 32 needs to be periodically replaced. However, since the nut portion 31 is integrally provided on the connection fitting 28, the fixing fitting portion 29 can be removed from the female screw portion 27 by turning the connection fitting 28 with an ordinary tool such as a spanner. Work can be done easily. Even when the connection fitting 28 is removed, the seal portion 33 is integrated with the connection fitting 28, so that the reliability can be improved without worrying about losing or forgetting to attach.
[0023]
In addition, according to this embodiment, although it was set as the double-seal structure of the seal part 33 and the O-ring 32, the O-ring 32 does not necessarily need to be provided and only the seal part 33 can maintain a sufficient sealing performance.
Moreover, the connection device for high-pressure piping is not limited to the aviation and space industries, and can be applied to a wide range of technical fields such as vehicles, machine tools, and home appliances.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the structure of the connection fitting can be simplified, and it is possible to attach and detach without using a special jig, and to replace an O-ring or the like. Maintenance inspection can also be performed easily. Further, the seal portion is expanded by the internal pressure of the flow passage and is brought into pressure contact with the spring receiving surface, thereby improving the sealing performance and maintaining the state of zero leakage.
According to the second aspect of the present invention, a double seal structure including an O-ring and a disc spring-like seal portion is provided, and a more reliable seal can be obtained.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of a high-pressure piping connection device according to an embodiment of the present invention.
FIG. 2 is a perspective view of a connection fitting according to the embodiment.
FIG. 3 is a partial cross-sectional side view of the high-pressure piping connection device according to the embodiment in use.
FIG. 4 is a partial cross-sectional side view of a conventional high-pressure piping connection device.
[Explanation of symbols]
21 ... Bulkhead 22 ... Connection port 23 ... Large diameter portion 24 ... Small diameter portion 25 ... O-ring receiving surface 26 ... Spring receiving surface 27 ... Female thread portion 28 ... Connection fitting 32 ... O-ring 33 ... Sealing portion

Claims (4)

圧力容器等の隔壁に設けられた接続ポートに接続金具を接続し、この接続金具に高圧配管を装着する高圧配管の接続装置において、
前記接続ポートを隔壁の外側に開口する大径部と隔壁の内側に開口する小径部とからなる段付き孔に形成し、前記大径部の内周面に雌ねじ部を設けるとともに、大径部と小径部との段部にバネ受け面を設け、前記接続金具に前記雌ねじ部にねじ込まれる雄ねじ部を形成するとともに、この雄ねじ部の端部に前記バネ受け面に対して弾性的に圧接する皿バネ状のシール部を一体に設けたことを特徴とする高圧配管の接続装置。In a connection device for high-pressure piping, in which a connection fitting is connected to a connection port provided in a partition wall such as a pressure vessel, and a high-pressure piping is attached to the connection fitting.
The connection port is formed in a stepped hole having a large diameter portion that opens to the outside of the partition wall and a small diameter portion that opens to the inside of the partition wall, and an internal thread portion is provided on the inner peripheral surface of the large diameter portion, and the large diameter portion And a small diameter portion provided with a spring receiving surface, and forming a male screw portion to be screwed into the female screw portion in the connection fitting, and elastically pressing the end portion of the male screw portion against the spring receiving surface. A connecting device for high-pressure piping, wherein a disc spring-like seal portion is provided integrally. 圧力容器等の隔壁に設けられた接続ポートに接続金具を接続し、この接続金具に高圧配管を装着する高圧配管の接続装置において、
前記接続ポートを隔壁の外側に開口し、その開口縁にＯリング受け面を有した大径部と隔壁の内側に開口する小径部とからなる段付き孔に形成し、前記大径部の内周面に雌ねじ部を設けるとともに、大径部と小径部との段部にバネ受け面を設け、前記接続金具に前記Ｏリング受け面に弾性的に圧接するＯリングを嵌合するとともに、前記雌ねじ部にねじ込まれる雄ねじ部を形成し、この雄ねじ部の端部に前記バネ受け面に対して弾性的に圧接する皿バネ状のシール部を一体に設けたことを特徴とする高圧配管の接続装置。In a connection device for high-pressure piping, in which a connection fitting is connected to a connection port provided in a partition wall such as a pressure vessel, and a high-pressure piping is attached to the connection fitting.
The connection port is formed in a stepped hole having a large-diameter portion having an O-ring receiving surface at the opening edge and a small-diameter portion opening on the inner side of the partition wall. While providing a female thread portion on the peripheral surface, providing a spring receiving surface at the step portion of the large diameter portion and the small diameter portion, fitting the O-ring elastically press-contacting the O-ring receiving surface to the connection fitting, A high-pressure pipe connection characterized in that a male screw part screwed into the female screw part is formed, and an end part of the male screw part is integrally provided with a disc spring-like seal part that is elastically pressed against the spring receiving surface. apparatus. 前記皿バネ状のシール部は、断面が横向きＵ字状で、内圧によって拡開してバネ受け面に対して圧接することを特徴とする請求項１または２記載の高圧配管の接続装置。3. The connection device for high-pressure piping according to claim 1, wherein the disc spring-like seal portion has a U-shaped cross section and is expanded by an internal pressure so as to be pressed against the spring receiving surface. 前記接続金具は、金具本体の外周部にナット部を一体に有し、金具本体とナット部とで形成される角部でＯリングを支持していることを特徴とする請求項２記載の高圧配管の接続装置。3. The high pressure according to claim 2, wherein the connection fitting has a nut portion integrally formed on an outer peripheral portion of the fitting main body, and supports an O-ring at a corner portion formed by the fitting main body and the nut portion. Piping connection device.
JP26310495A 1995-10-11 1995-10-11 High pressure piping connection device Expired - Fee Related JP3673309B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26310495A JP3673309B2 (en) 1995-10-11 1995-10-11 High pressure piping connection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26310495A JP3673309B2 (en) 1995-10-11 1995-10-11 High pressure piping connection device

Publications (2)

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JPH09105484A JPH09105484A (en) 1997-04-22
JP3673309B2 true JP3673309B2 (en) 2005-07-20

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Cited By (1)

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WO2020040841A1 (en) * 2018-08-21 2020-02-27 Parker-Hannifin Corporation Fluid connector

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JP2007187609A (en) * 2006-01-16 2007-07-26 Nippon Soken Inc Structure of mounting pressure sensor
US20110121562A1 (en) * 2009-11-24 2011-05-26 Jonathan Clark Swift Hybrid tube connector port
CN105299345B (en) * 2015-11-13 2017-11-07 嘉兴新亚汽车零部件有限公司 A kind of pressure vessel adjustable type joint
JP2018194015A (en) * 2017-05-12 2018-12-06 いすゞ自動車株式会社 adapter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020040841A1 (en) * 2018-08-21 2020-02-27 Parker-Hannifin Corporation Fluid connector
US11549621B2 (en) 2018-08-21 2023-01-10 Parker-Hannifin Corporation Fluid connector

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