JP4835093B2

JP4835093B2 - Pressure-resistant fluoroscopic window sealing device

Info

Publication number: JP4835093B2
Application number: JP2005292056A
Authority: JP
Inventors: 辰雄佐藤
Original assignee: NIHON KLINGAGE CO Ltd
Current assignee: NIHON KLINGAGE CO Ltd
Priority date: 2005-10-05
Filing date: 2005-10-05
Publication date: 2011-12-14
Anticipated expiration: 2025-10-05
Also published as: JP2007101385A

Description

本発明は、高圧または低圧の不透明な密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置に係り、特に、液化二酸化炭素収納容器・高圧ボイラーや内燃機関とか、深海艇や宇宙船のような各種密閉構造体の耐圧透視窓のシール装置に関する。 The present invention relates to a pressure-resistant transparent window sealing device for hermetically seeing through a high-pressure or low-pressure opaque hermetic structure, in particular, a liquefied carbon dioxide storage container, a high-pressure boiler, an internal combustion engine, a deep-sea boat, The present invention relates to a pressure-resistant transparent window sealing device for various sealed structures such as a spacecraft.

自動車用燃料タンクのような大気圧程度の容器内液面を覗くための透視窓として、例えば下記の特許文献１のように、熱可塑性プラスチック製の筒状透視窓本体の射出成形時に、透視窓本体の環状溝となる部分にＯリング状の弾性パッキングを外周面に備えたたレンズ体をインサート成形して透視窓本体に埋め込んだ透視窓体が周知である。
特開平１０−３００５５３号公報 As a see-through window for looking into the liquid level in a container having a pressure of about atmospheric pressure, such as a fuel tank for automobiles, a see-through window is used at the time of injection molding of a cylindrical see-through window main body made of thermoplastic, for example, as in Patent Document 1 below. A see-through window body in which a lens body having an O-ring-shaped elastic packing on an outer peripheral surface is insert-molded and embedded in a see-through window body is known.
Japanese Patent Laid-Open No. 10-300553

このほかに、下記の特許文献２のように、大気圧程度の燃焼容器の側面に突設したシールボックスの透孔内における覗き窓ガラスの外周面全体に分厚い耐熱グランドパッキングを嵌合配置し、その前後に介在したパッキング押さえと上記パッキングとを、押さえボルトで圧縮することで、覗き窓ガラスを気密シールした燃焼容器の覗き窓も周知である。
特開２０００−３４６３４８号公報 In addition to this, a thick heat-resistant gland packing is fitted and arranged on the entire outer peripheral surface of the viewing window glass in the through hole of the seal box protruding from the side surface of the combustion container at about atmospheric pressure as in Patent Document 2 below, Also known is a combustion container viewing window in which the viewing window glass is hermetically sealed by compressing the packing retainer interposed between the front and rear and the packing with a retaining bolt.
JP 2000-346348 A

また、流通観測用の密閉容器内を透視するための耐圧透視窓のシール装置としては、例えば下記の特許文献３のように、上記密閉容器の凹所に形成した透孔の内鍔外面に窓板押さえ金具で定位した透視窓体の外周縁の外側における前記容器凹所周辺の外面と、窓板外周縁の内側における窓板外側面とにそれぞれワッシャー状外側パッキング押さえと、縁取り状内側パッキング押さえとの各内側に圧力で膨張してシール性が増す断面Ｃ型のリングパッキングを個別に介在することで、上記窓板の外周縁と容器本体凹所の周面との間隙を経た前記高圧密閉容器の内圧により、上記内外二つのパッキングをそれぞれ上記各パッキング押さえと窓板押さえ金具の内側との間隙に押し付けシール可能にした耐圧透視窓のシール装置が周知である。
特開２００５−１８９１３９号公報 In addition, as a sealing device for a pressure-resistant fluoroscopic window for seeing through the inside of a closed container for flow observation, for example, as in Patent Document 3 below, a window is formed on the outer surface of the inner hole of the through hole formed in the recess of the sealed container. A washer-shaped outer packing press and a rim-shaped inner packing press on the outer surface around the container recess on the outside of the outer peripheral edge of the fluoroscopic window body fixed by the plate pressing metal fitting and the window plate outer surface on the inner side of the outer peripheral edge of the window plate, respectively. The high-pressure sealing that has passed through the gap between the outer peripheral edge of the window plate and the peripheral surface of the container body recess is individually provided with a C-shaped ring packing that expands due to pressure and increases the sealing performance. A sealing device for a pressure-resistant fluoroscopic window is known in which the inner and outer two packings are pressed against the gaps between the packing retainers and the inner side of the window plate retainer by the internal pressure of the container.
JP 2005-189139 A

さらに流体配管の端末密閉部材やパイプ継手用として、弾性パッキングによる自食い込みシール装置も下記の特許文献４および非特許文献１に記載のように現用一般である。
特開２００２−２０６６８１号公報昭和４０年１月３１日・株式会社オーム社発行の書籍「パッキンとシールの設計」第１０８頁第５・１１図（ｃ）および第１２０頁第５・２６図（ａ）と、その簡単な説明文。 Further, as described in Patent Document 4 and Non-Patent Document 1 below, a self-eating seal device using elastic packing is also commonly used as a terminal sealing member for fluid piping and pipe joints.
JP 2002-206681 A January 31, 1965-Ohm Co., Ltd. book "Design of packing and seal", page 108, Figs. 5 and 11 (c) and page 120, Figs. 5 and 26 (a) and its simple Explanatory text.

前記特許文献１の従来例は、専ら自動車用燃料タンクのような大気圧程度の不透明な容器内の液面を覗くための透視窓であり、本件発明のように外圧と著しく異なる内圧の密閉構造体の内部を気密的に透視するという発明意図は、特許文献１には無いから、この特許文献１では、熱可塑性プラスチック製の筒状透視窓本体の射出成形時、その環状溝となる部分にＯリング状の弾性パッキングを外周面に配置したレンズ体をインサート成形して透視窓本体に埋め込んだ圧接シールタイプの液面透視窓としたものである。 The conventional example of Patent Document 1 is a see-through window for looking into the liquid level in an opaque container of about atmospheric pressure, such as a fuel tank for automobiles, and a sealed structure with an internal pressure that is significantly different from the external pressure as in the present invention. Since Patent Document 1 does not have the intent to see the inside of the body in an airtight manner, in Patent Document 1, in the injection molding of the cylindrical fluoroscopic window body made of thermoplastic resin, A lens body in which an O-ring-shaped elastic packing is arranged on the outer peripheral surface is insert-molded to form a pressure seal type liquid level transparent window embedded in a transparent window main body.

すなわち、この特許文献１の従来例は、弾性パッキングをその弾力に抗し変形させずにレンズ体の外周溝と透視窓本体の内周溝とで単にインサート埋め込み固定しただけの液面透視窓だから、上記弾性パッキングの外面は、レンズ体の外周溝と透視窓本体の内周溝とに弾力的に密着できず、パッキング外面とこれら各溝との間に僅かな間隙が存在している結果、レンズ体と透視窓本体との間隙を経た折角の流体圧力が上記間隙を経て外部に洩れてしまい、パッキング外面を流体圧力でレンズ体と透視窓本体との間隙に自食い込み圧着できないので、この間隙を弾性パッキングで自食い込みシールできないという本質的かつ、大きな問題点が有る。 That is, the conventional example of Patent Document 1 is a liquid level see-through window that is simply embedded and fixed between the outer peripheral groove of the lens body and the inner peripheral groove of the see-through window body without deforming the elastic packing against its elasticity. The outer surface of the elastic packing cannot be elastically adhered to the outer peripheral groove of the lens body and the inner peripheral groove of the see-through window body, and there are slight gaps between the outer surface of the packing and these grooves. Since the fluid pressure at the corner through the gap between the lens body and the fluoroscopic window body leaks to the outside through the gap, the outer surface of the packing cannot be bitten into the gap between the lens body and the fluoroscopic window body by the fluid pressure and cannot be compressed. There is an essential and big problem that self-eating cannot be sealed with elastic packing.

この問題点のほかに上記特許文献１は、熱可塑性プラスチック製の筒状透視窓本体の射出成形時に、その環状溝となる成形金型部分にＯリング状弾性パッキングを外周面に備えたレンズ体を配置してインサート成形することで、レンズ体を上記パッキングと共に透視窓本体に埋め込んだ透視窓だから、高価なインサート成形金型が必要であるし、レンズ体のインサート成形を初めとして、弾性パッキングの位置決めインサート成形作業が著しく面倒で作業性悪く、その部品管理・組立製造・保守点検などのすべての面で扱い辛く不便で面倒であるという本質的かつ、大きな問題点も有る。 In addition to this problem, Patent Document 1 discloses a lens body in which an outer peripheral surface is provided with an O-ring elastic packing in a molding die portion that becomes an annular groove at the time of injection molding of a cylindrical see-through window body made of thermoplastic plastic. Since the lens body is embedded in the body of the transparent window together with the above packing by inserting and molding, an expensive insert molding die is required, and the elastic packing of the lens body such as insert molding is required. The positioning insert molding work is extremely troublesome and poor in workability, and there are also essential and major problems that it is difficult to handle, inconvenient and troublesome in all aspects such as parts management, assembly manufacturing and maintenance inspection.

しかも、上記特許文献１による透視窓本体は、インサート成形の関係上、熱可塑性プラスチックで射出成形する必要が有るから、金属などの強靱材で作ったものよりも強度的に著しく弱いので、この特許文献１の透視窓は、内圧が外圧よりも著しく高圧または低圧の不透明な高圧密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置には強度的な観点から使用できないという本質的かつ、大きな問題点も有る。 In addition, the transparent window body according to the above-mentioned Patent Document 1 needs to be injection-molded with a thermoplastic because of insert molding, and therefore is significantly weaker than that made of a tough material such as metal. The essence that the see-through window of Document 1 cannot be used from the viewpoint of strength in a pressure-resistant see-through window seal device for airtightly seeing the inside of an opaque high-pressure sealed structure whose internal pressure is significantly higher or lower than the external pressure. There are also major problems.

次に、特許文献２は、大気圧程度の燃焼容器の側面に突設したシールボックスの透孔内における覗き窓ガラスの外周面全体に分厚い耐熱グランドパッキングを嵌合配置し、その前後に介在したパッキング押さえと上記パッキングとを、押さえボルトでメカ的に圧縮することで、覗き窓ガラスをシールボックスに対し、強引に圧接シール可能にした燃焼容器の覗き窓である。 Next, in Patent Document 2, a thick heat-resistant gland packing is fitted and arranged on the entire outer peripheral surface of the viewing window glass in the through hole of the seal box protruding from the side surface of the combustion vessel at about atmospheric pressure, and interposed between the front and rear sides thereof. This is a combustion chamber viewing window in which the packing window and the packing are mechanically compressed with a retaining bolt so that the viewing window glass can be forcibly pressed and sealed against the seal box.

したがって、前記グランドパッキングには、外部圧力による自食い込みシール作用が無く、上記パッキングのメカ的圧縮度の経年変化による上記圧接シール性の悪化を修復するために、特許文献２では、定期的に押さえボルトを増し締めして上記圧着シール性を確保する必要が有り、その部品管理・保守点検などのすべての面で扱い辛く不便で面倒であるし、メンテナンス費用の面でも不利であるという本質的かつ、大きな問題点が有る。 Accordingly, the gland packing does not have a self-eating seal function due to external pressure, and in order to repair the deterioration of the pressure-contact sealability due to the secular change of the mechanical compression degree of the packing, in Patent Document 2, it is periodically pressed. It is necessary to retighten the bolts to ensure the above-mentioned pressure-bonding and sealing performance, which is difficult, inconvenient and troublesome in all aspects such as parts management, maintenance and inspection, and disadvantageous in terms of maintenance costs. There is a big problem.

すなわち、上記特許文献２の従来例は、燃焼容器の耐熱覗き窓として使用できても、内圧が大気よりも著しく高圧または低圧の流体密閉構造体内の耐圧透視窓のシール装置としては、前述したようなメカ的に圧縮したグランドパッキングには、外部圧力による自食い込みシール作用が無いから、上記密閉構造体の内外圧力差が大きくなる程シール力が弱くなるため、使用できないという本質的な問題点も有る。 That is, although the conventional example of the above-mentioned Patent Document 2 can be used as a heat-resistant viewing window of a combustion container, as described above, as a sealing device for a pressure-resistant fluoroscopic window in a fluid hermetic structure whose internal pressure is significantly higher or lower than air, Since the mechanically compressed gland packing does not have a self-engraving seal action due to external pressure, the sealing force becomes weaker as the internal / external pressure difference of the sealed structure increases, so there is an essential problem that it cannot be used. Yes.

また、前記特許文献３は、高圧密閉容器の凹所内に設けた窓板の外周縁の外側と内側とにそれぞれ加圧により膨張するパッキングを個別に介在することで、上記容器に対して透視窓体を圧着シールした高圧密閉容器用の耐圧透視窓のシール装置ではあるが、この文献３では、窓板の外周縁の外側における前記容器凹所周辺の外面と、窓板外周縁の内側における窓板外側面とにそれぞれワッシャー状外側パッキング押さえと、縁取り状内側パッキング押さえとを介して前記内外二つのパッキングを個別に介在させる必要が有る。 Moreover, the said patent document 3 is a see-through window with respect to the said container by interposing the packing which expand | swells by each separately in the outer side and the inner side of the outer periphery of the window plate provided in the recessed part of a high pressure sealed container Although this is a pressure-resistant transparent window sealing device for a high-pressure sealed container with a pressure-sealed body, in this document 3, the outer surface around the container recess outside the outer peripheral edge of the window plate and the window inside the outer peripheral edge of the window plate It is necessary to interpose the two inner and outer packings individually on the outer surface of the plate via a washer-like outer packing presser and an edged inner packing presser.

したがって、この特許文献３は、上記合計四点のシール部品を要するため、その部品管理・組立製造・保守点検などのすべての面で扱い辛く不便で面倒であるし、シール部品点数が多い分だけ密閉容器に対する透視窓体を圧着シール性の不安定要素も多くなるという本質的かつ、大きな問題点が有る。 Therefore, since this patent document 3 requires the total of four seal parts, it is cumbersome, inconvenient and troublesome in all aspects such as parts management, assembly manufacturing, maintenance and inspection, and the number of seal parts is large. There is an essential and big problem that there are many unstable elements of the pressure sealing property of the transparent window body for the sealed container.

また、上記特許文献３は、縁取り状の内側パッキング押さえを透視窓体外周縁の内側における窓体外側面に大きく張り出して配置する必要が有るので、この内側パッキング押さえが折角の窓体視野を大きく邪魔するため、透視窓体の肝心な有効視野が大幅に狭まってしまうという本質的かつ、大きな問題点も有る。 Further, in Patent Document 3, it is necessary to dispose the rim-shaped inner packing presser so as to greatly extend on the outer side surface of the window body inside the outer peripheral edge of the transparent window body, and therefore this inner packing presser greatly disturbs the folding window body visual field. Therefore, there is an essential and big problem that the important effective visual field of the fluoroscopic window body is significantly narrowed.

さらに上記特許文献３は、高圧密閉容器の凹所内に設けた透視窓体の外周縁の外側と内側とにそれぞれＣリング状のパッキングを個別に介在することで、上記窓板の外周縁と容器本体凹所の周面との間隙を経て加わる前記高圧密閉容器の内圧により、上記内外二つのパッキングをそれぞれ上記各パッキング押さえと窓板押さえ金具の内側とに押し付けることで、これら各部の間隙を圧接シール可能にした高圧密閉容器用の耐圧透視窓のシール装置であるから、内圧が大気よりも低圧の例えば真空密閉容器用の透視窓体のシール装置には使用できない。 Further, Patent Document 3 discloses that the outer peripheral edge of the window plate and the container are provided by individually interposing C-ring-shaped packings on the outer and inner sides of the outer peripheral edge of the see-through window provided in the recess of the high-pressure sealed container. By pressing the two inner and outer packings against the inner side of the packing presser and the window plate presser by the internal pressure of the high-pressure sealed container applied through the gap with the peripheral surface of the main body recess, the gaps between these parts are pressed against each other. Since it is a pressure-resistant transparent window sealing device for a high-pressure sealed container that can be sealed, it cannot be used in a transparent window body sealing device for, for example, a vacuum sealed container whose internal pressure is lower than the atmosphere.

すなわち、真空密閉容器の内部を気密的に透視する耐圧透視窓のシール装置に特許文献３のシール装置を無理に適用した場合には、この文献３における内外二つのパッキング押さえに加わる強い外圧で、内外二つのパッキングが透視窓体の外周縁方向に寄り集まってしまう結果、各パッキングがパッキング押さえから大きく外れてシール不可能となってしまうので、この特許文献３の高圧密閉容器用耐圧透視窓のシール装置は、真空密閉容器用の耐圧透視窓のシール装置には使えないという本質的かつ、大きな問題点も有る。 That is, when the sealing device of Patent Document 3 is forcibly applied to the sealing device of the pressure-resistant see-through window for seeing the inside of the vacuum sealed container in an airtight manner, with a strong external pressure applied to the inner and outer two packing pressers in this document 3, As a result of the two inner and outer packings gathering in the direction of the outer peripheral edge of the see-through window body, each packing is greatly disengaged from the packing holder and cannot be sealed. The sealing device has an essential and serious problem that it cannot be used as a sealing device for a pressure-resistant fluoroscopic window for a vacuum sealed container.

次に、前記特許文献４および非特許文献１に記載の外部圧力による自食い込みシール装置は、流体配管の端末密閉シールやパイプ継手のシール装置であるから、本発明のような不透明な高圧密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置には、使用できないという本質的かつ、大きな問題点が有る。 Next, since the self-eating seal device with external pressure described in Patent Document 4 and Non-Patent Document 1 is a terminal sealing seal for fluid piping and a sealing device for pipe joints, an opaque high-pressure sealing structure as in the present invention is used. A sealing device for a pressure-resistant fluoroscopic window for seeing through the inside of a body in an airtight manner has an essential and great problem that it cannot be used.

この発明は、前記各従来例における多くの問題点を除去するために、高圧または低圧の不透明な密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置を安価に多量提供することを目的とする。 In order to eliminate many problems in each of the above conventional examples, the present invention provides a large number of pressure-resistant transparent window sealing devices for airtightly seeing the inside of a high-pressure or low-pressure opaque sealed structure. For the purpose.

上記した本発明の目的は、高圧または低圧の不透明な密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置を構成するに当たり、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面の上下にそれぞれ拡径凹所（または環状溝）と内鍔を形成し、この内鍔上に配置した透視窓体の外周面と前記拡径凹所（または環状溝）との周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記透視窓体の上部周辺に強靱なリングカバーの内鍔を被せつつ、このカバーの下部に突設した突環（または中間リングや上記カバー自体）の下面を前記ベースリングの上面に対接させると共に、前記拡径凹所を覆ってリングカバーをベースリングに同軸的に固定したことで達成できた。 An object of the present invention described above is to provide a hermetic attachment around the through hole of the hermetic structure in constructing a sealing device for a pressure-resistant see-through window for hermetically seeing the inside of the high-pressure or low-pressure opaque hermetic structure. An enlarged diameter recess (or an annular groove) and an inner flange are formed on the upper and lower sides of the inner peripheral surface of the tough base ring, respectively, and the outer peripheral surface of the see-through window body disposed on the inner flange and the enlarged diameter recess (or An O-ring-shaped elastic packing is deformed against the elasticity and press-fitted so as to move up and down between the circumferential surface of the annular groove and the inner periphery of a tough ring cover is placed around the upper part of the transparent window body. However, the lower surface of the projecting ring (or the intermediate ring or the cover itself) projecting from the lower portion of the cover is brought into contact with the upper surface of the base ring, and the ring cover is coaxial with the base ring so as to cover the enlarged diameter recess. This can be achieved by fixing the target.

この発明における請求項１から請求項６までの各発明によれば、高圧または低圧の不透明な密閉構造体の透孔周辺に気密設置して使用している透視窓体の外周面とベースリング（またはリングカバー）の内周面との間隙を経た流体圧力で、前記弾性パッキングを透視窓体の外周面に沿わせて押し動かし、その外面を透視窓体の外周面と、前記拡径凹所（または環状溝）と、リングカバーの突環下面（または中間リングの下面）とに満遍なく変形圧着させることで、これら各面間における間隙に上記弾性パッキングを部分的に自食い込みさせて確実に気密シールできるという優れた効果が有る。 According to the first to sixth aspects of the present invention, the outer peripheral surface and the base ring of the see-through window used in an airtight manner around the through hole of the high-pressure or low-pressure opaque sealed structure. Alternatively, the elastic packing is pushed and moved along the outer peripheral surface of the fluoroscopic window body with the fluid pressure passing through the gap with the inner peripheral surface of the ring cover), and the outer surface thereof and the outer diameter recess of the fluoroscopic window body (Or annular groove) and the lower surface of the ring cover (or the lower surface of the intermediate ring) are uniformly deformed and pressure-bonded, so that the elastic packing is partially self-engaged into the gap between these surfaces to ensure airtightness. There is an excellent effect that it can be sealed.

すなわち、本発明における弾性パッキングは、これに加わる流体圧力で透視窓体の外周面に沿って移動しつつほぼ矩形に変形し、前記各面間における間隙に上記弾性パッキングを部分的に強く自食い込みさせて気密シールできたので、内外圧力差が例えば１０００ヘクト・パスカル（１気圧）程度の密閉構造体から、４０〜６０メガ・パスカル（４００〜６００気圧）程度の超高圧密閉構造体や真空密閉構造体の内部を気密的に透視するための耐圧透視窓のシール装置、例えば液化二酸化炭素収納容器や配管材・高圧ボイラーや内燃機関の耐圧透視窓のシール装置とか、深海艇や宇宙船のような各種密閉構造体の耐圧透視窓のシール装置としても立派に使用でき、そのシール力は、上記密閉構造体の内外圧力差が大きくなる程、強くなるという優れた効果が有る。 That is, the elastic packing according to the present invention is deformed into a substantially rectangular shape while moving along the outer peripheral surface of the see-through window body by the fluid pressure applied thereto, and the elastic packing partially bites into the gap between the surfaces. As a result of hermetic sealing, a sealed structure with a pressure difference of about 1000 hectopascals (1 atm), an ultra-high pressure sealed structure with a pressure of about 40 to 60 megapascals (400 to 600 atm), and vacuum sealing Sealing device for pressure-resistant see-through window for seeing the inside of the structure airtightly, such as liquefied carbon dioxide storage container, piping material, high-pressure boiler, pressure-resistant see-through window seal device for internal combustion engine, deep sea boat and spacecraft It can be used as a sealing device for pressure-resistant fluoroscopic windows of various sealed structures, and the sealing force increases as the internal / external pressure difference of the sealed structure increases. Excellent effect there.

また、前記各発明によれば、強靱なベースリングの内鍔上に配置した透視窓体の外周面と前記拡径凹所の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記透視窓体の上部周辺に強靱なリングカバーの内鍔を被せつつ、このカバーの下部に突設した突環（または中間リング）の下面を前記ベースリングの上面に対接させると共に、前記拡径凹所を覆ってリングカバーをベースリングに同軸的に固定するだけで、前記超高圧密閉構造体や真空密閉構造体の内部を透視できる耐圧透視窓のシール装置を構成できたので、その部品管理・組立製造・梱包保管・運搬流通・販売購入・開梱使用・保守点検などのすべての面で扱い易く、価格的にも有利になったという優れた効果が有る。 Further, according to each of the above inventions, an O-ring shaped elastic packing is resisted against the elasticity between the outer peripheral surface of the see-through window body arranged on the inner collar of the tough base ring and the peripheral surface of the enlarged diameter recess. Then, it is press-fitted so that it can be moved up and down, and the inner surface of a tough ring cover is covered around the upper part of the transparent window body, and the lower surface of a projecting ring (or intermediate ring) projecting from the lower part of the cover is placed on the base A pressure-resistant see-through window that allows the inside of the ultra-high pressure sealed structure or vacuum sealed structure to be seen through by simply contacting the upper surface of the ring and covering the enlarged recess and coaxially fixing the ring cover to the base ring. It was easy to handle in all aspects such as parts management, assembly manufacturing, packing storage, transportation and distribution, sales purchase, unpacking use, maintenance and inspection, and it was advantageous in terms of price. There is an effect.

さらに、前記各発明によれば、前記各部材を順次に組立てることで、耐圧透視窓のシール装置を構成できたので、前記特許文献１のような熱可塑性プラスチック製の筒状透視窓本体の射出成形時にその環状溝となる部分にＯリング状の弾性パッキングを外周面に配置したレンズ体をインサート成形して透視窓本体に埋め込んだ透視窓とは大きく異なり、本発明では、特許文献１のようなインサート成形は一切不要で、高価なインサート成形金型も不要であるから、その部材管理・組立製造・保守点検などのすべての面で扱い易く、価格的にも著しく有利であるという優れた効果も有る。 Further, according to each of the above-described inventions, the sealing device for the pressure-resistant see-through window can be configured by sequentially assembling the respective members. Therefore, the injection of the cylindrical see-through window main body made of thermoplastic as in the above-mentioned Patent Document 1. Unlike a see-through window in which a lens body in which an O-ring-shaped elastic packing is arranged on the outer peripheral surface is inserted into a portion that becomes an annular groove at the time of molding and embedded in a see-through window body, in the present invention, as in Patent Document 1 This eliminates the need for expensive insert molding and eliminates the need for expensive insert molding dies, which makes it easy to handle in all aspects such as component management, assembly manufacturing, maintenance and inspection, and is extremely advantageous in terms of price. There is also.

また、前記各発明によれば、前記ベースリングとリングカバーとで囲んだ透視窓体の外周面における間隙を前記Ｏリング状の弾性パッキングだけで透視窓体の外周面における間隙を前記のように自食い込みシールできたので、このシールのための部品点数が前記特許文献３よりも著しく少なく、その部品管理・組立製造・保守点検などのすべての面で扱い易く、価格的にも有利になったし、シール部品点数が少ない分だけ高圧または低圧密閉構造体に対する透視窓体のシール性の不安定要素も減少したという優れた効果も有る。 Further, according to each of the above inventions, the gap on the outer peripheral surface of the fluoroscopic window body surrounded by the base ring and the ring cover is made to be the gap on the outer peripheral surface of the fluoroscopic window body only by the O-ring shaped elastic packing as described above. Since it was able to self-engage, the number of parts for this seal was significantly less than that of Patent Document 3, and it was easy to handle in all aspects such as parts management, assembly manufacturing, maintenance and inspection, and it became advantageous in terms of price. In addition, there is an excellent effect that the unstable factor of the sealing performance of the transparent window body with respect to the high-pressure or low-pressure sealed structure is reduced by the small number of seal parts.

さらに本発明によれば、前述した特許文献３のような透視窓体外周縁の内側に大きく張り出したシール用部材が無いので、本発明では、特許文献３のように透視窓体の肝心な有効視野が狭くならないし、本発明における弾性パッキングは、これに加わる流体圧力で、透視窓体の外周面に沿って移動するので、内圧が大気よりも低圧の例えば真空密閉構造体用の透視窓体のシール装置にも本発明を立派に採用できるという優れた効果も有る。 Furthermore, according to the present invention, there is no sealing member that protrudes greatly inside the outer periphery of the transparent window body as in Patent Document 3 described above. Therefore, in the present invention, the important effective visual field of the transparent window body as in Patent Document 3 is described. Since the elastic packing in the present invention moves along the outer peripheral surface of the fluoroscopic window body due to the fluid pressure applied to the elastic packing in the present invention, the internal pressure of the fluoroscopic window body for a vacuum sealed structure whose pressure is lower than the atmosphere, for example, The sealing device also has an excellent effect that the present invention can be adopted satisfactorily.

さらにまた、本発明は前述したように、上記密閉構造体の内外圧力差が大きくなる程強くなる弾性パッキングの自食い込みシール作用が有るので、前記特許文献２のようなメカ的圧縮度の経年変化によるシール性の悪化を修復するための定期的な押さえボルトを増し締めが一切不要であるから、その保守点検が容易で、メンテナンス費用の面でも有利であるという優れた効果も有る。 Furthermore, as described above, the present invention has a self-engraving and sealing action of the elastic packing that becomes stronger as the internal / external pressure difference of the sealed structure increases, so that the mechanical compression degree changes over time as in the above-mentioned Patent Document 2. Since there is no need to retighten the regular holding bolt for repairing the deterioration of the sealing performance due to the above, there is an excellent effect that the maintenance inspection is easy and the maintenance cost is advantageous.

本発明における請求項７および請求項８に記載の発明のように、前記密閉構造体の透孔周辺に前記ベースリングを予め同軸的に一体突設したり、ベースリングに突設した外鍔を前記密閉構造体の透孔周辺に気密保持用ガスケットを挟んで同軸的にねじ止め固定することで、密閉構造体に対してベースリングを溶着する必要が無く、現場で使用するに当たり、その部品管理・組立製造・梱包保管・運搬流通・販売購入・開梱使用・保守点検などのすべての面で、より一層扱い易く、価格的にも有利になったという効果を付加できた。 As in the inventions of the seventh and eighth aspects of the present invention, the base ring is integrally coaxially projected in advance around the through hole of the hermetic structure, or an outer casing projecting from the base ring is provided. By screwing and fixing coaxially with an airtight holding gasket around the hole of the sealed structure, there is no need to weld a base ring to the sealed structure, and parts management for use on site・ In all aspects of assembly manufacturing, packing storage, transportation and distribution, sales purchase, unpacking use, maintenance and inspection, etc., it was possible to add the effect that it was easier to handle and advantageous in terms of price.

本発明における請求項９の発明によれば、前記弾性パッキングの上面に隙間塞ぎ用の偏平リングを配置したので、透視窓体の上部外周面における間隙が大きくても、この間隙を上記隙間塞ぎ用の偏平リングで見掛け上小さくでき、弾性パッキングの過大な自食い込み変形を防げるから、良好な自食い込みシールを容易に確保でき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなるという効果を付加できた。 According to the ninth aspect of the present invention, since the flat ring for closing the gap is arranged on the upper surface of the elastic packing, even if the gap on the upper outer peripheral surface of the fluoroscopic window body is large, this gap is used for closing the gap. The flat ring can be made small and can prevent excessive self-eating deformation of the elastic packing, so that a good self-eating seal can be easily secured, and this sealing force increases as the internal / external pressure difference of the sealed structure increases. The effect of becoming could be added.

本発明における前記リングカバーをベースリングに同軸的に固定するには、前記実施形態以外に、請求項１１の発明のように前記リングカバーの内周面に形成した雌ねじをベースリングの外周面に形成した雄ねじに締着したり、請求項１２の発明のようにリングカバーの外周面に形成した雄ねじをベースリングの内周面に形成したに雌ねじに締着することで、それぞれリングカバーをベースリングに着脱可能に固定できたので、その組立製造・開梱使用・保守点検などのすべての面で扱い易くなったという効果を付加できた。 In order to fix the ring cover in the present invention coaxially to the base ring, in addition to the above embodiment, an internal thread formed on the inner peripheral surface of the ring cover as in the invention of claim 11 is provided on the outer peripheral surface of the base ring. The ring cover can be fastened to the formed male screw, or the male screw formed on the outer peripheral surface of the ring cover as in the invention of claim 12 can be fastened to the female screw formed on the inner peripheral surface of the base ring. Since it could be detachably fixed to the ring, it was possible to add the effect that it became easy to handle in all aspects such as assembly manufacturing, unpacking use, maintenance and inspection.

次に、本発明を実施するための第一の最良な形態例を詳細に説明すると、例えば液化二酸化炭素などの高圧流体を充填貯蔵したり、流通させるべき図１のような不透明の高圧密閉容器や高圧密閉配管材などの密閉構造体１内の液面状態や液体流通状態を外部から気密的に透視するための耐圧透視窓のシール装置を構成するに当たり、先ず前記密閉構造体１内に上記高圧流体２を充填する前に、密閉構造体１の適所に形成した覗き孔となる透孔１Ａの周辺に、例えば図２のような金属や強化プラスチックなどの強靱材で円形リング状に作ったベースリング３を図１のように金属溶着部ｙとか、強力接着剤による接着部ｙで気密的に強固に取着して使用するのであるが、このベースリング３の上下には、それぞれ図２のような拡径凹所４と内鍔５とを旋盤加工などで予め形成しておく。 Next, the first best mode for carrying out the present invention will be described in detail. An opaque high-pressure sealed container as shown in FIG. 1 to be filled and stored with a high-pressure fluid such as liquefied carbon dioxide or to be circulated. In constructing a sealing device for a pressure-resistant see-through window for airtightly seeing the liquid surface state and the liquid flow state in the sealed structure 1 such as a high-pressure sealed pipe material from the outside, Before filling with the high-pressure fluid 2, a circular ring is formed around the through-hole 1 </ b> A, which is a peep hole formed at a proper position of the sealed structure 1, with a tough material such as metal or reinforced plastic as shown in FIG. 2. As shown in FIG. 1, the base ring 3 is hermetically and firmly attached to the metal welded portion y or the adhesive portion y using a strong adhesive. Expanded recess 4 and inner flange 5 like The previously formed by such turning.

次いで、上記内鍔５上に強化ガラスやアクリル樹脂などの強靱な透明材で偏平円柱状に作った図２のような耐圧透視窓体６を図３のように同軸的に配置した後、その外周面と前記拡径凹所４の周面との間に、天然ゴムまたは合成ゴムなどの弾性材で円形リング状に作った断面輪郭がほぼ円形のＯリング状弾性パッキング７をその弾力に抗し同図３のように縦長に変形させた状態で前記透視窓体６の外周面に沿って上下動可能に圧入配置する。 Next, after the pressure-resistant fluoroscopic window body 6 as shown in FIG. 2 made of a tough transparent material such as tempered glass or acrylic resin on the inner casing 5 is arranged coaxially as shown in FIG. Between the outer peripheral surface and the peripheral surface of the diameter-enlarged recess 4, an O-ring-shaped elastic packing 7 having a substantially circular cross-sectional profile made of an elastic material such as natural rubber or synthetic rubber is resistant to its elasticity. However, it is press-fitted and arranged so as to be movable up and down along the outer peripheral surface of the see-through window 6 in a state of being deformed vertically as shown in FIG.

その後、前記透視窓体６の上部周辺に金属や強化プラスチックなどの強靱材で、円形リング状に作った図２のようなリングカバー８の内鍔９を被せつつ、このカバーの下部に図２のように同軸的に突設した突環１０の下面を前記ベースリング３の上面に対接させると共に、突環１０の下面で前記拡径凹所４の上部を図４および図５に示す要部拡大断面図のように満遍なく覆った状態で、リングカバー８をベースリング３の周辺に複数の締め付けボルト１１により例えば四個所等間隔で図１・図５のように着脱可能に締着固定する。 Thereafter, the inner periphery of the ring cover 8 as shown in FIG. 2 made of a tough material such as metal or reinforced plastic is covered around the upper portion of the transparent window body 6 as shown in FIG. As shown in FIGS. 4 and 5, the lower surface of the projecting ring 10 protruding coaxially is brought into contact with the upper surface of the base ring 3, and the upper portion of the enlarged-diameter recess 4 on the lower surface of the projecting ring 10 is shown in FIGS. With the cover uniformly covered as shown in the enlarged sectional view of the part, the ring cover 8 is fixed around the base ring 3 so as to be detachable as shown in FIGS. .

上記のように各部を構成した後、前記密閉構造体１に形成した覗き孔用透孔１Ａの周辺に前記ベースリング３の下部周辺を図１のように金属溶着部ｙや強力接着剤による接着部ｙで気密的に強固に取着した後、密閉構造体１内に例えば液化二酸化炭素などの低温高圧の流体２を充填すると、上記密閉構造体１内が４０〜６０メガ・パスカル（４００〜６００気圧）程度に著しく高圧になるが、この高圧程度は、密閉構造体１内の流体２の種類や内部空間圧力などにより大幅に変動し、この内圧変動分に対応して弾性パッキングの弾力や、材質を選定すればよく、上記弾力が若干小さめの柔軟な弾性パッキングを用いることで、密閉構造体の内外圧力差が例えば１０００ヘクト・パスカル（１気圧）程度でも、以下に示す弾性パッキング７の自食い込みシール動作に支障を来たさない。 After each part is configured as described above, the lower periphery of the base ring 3 is bonded to the periphery of the viewing hole 1A for the peephole formed in the sealed structure 1 with a metal welded portion y or a strong adhesive as shown in FIG. After tightly and firmly attaching at the part y, when the sealed structure 1 is filled with a low-temperature and high-pressure fluid 2 such as liquefied carbon dioxide, the inside of the sealed structure 1 is 40-60 megapascals (400- However, the high pressure level varies greatly depending on the type of fluid 2 in the sealed structure 1 and the internal space pressure. The material of the elastic packing 7 shown below can be selected by using a flexible elastic packing having a slightly smaller elasticity, even if the internal / external pressure difference of the sealed structure is about 1000 hectopascals (1 atm). Self It does not disturb the seal behavior narrowing have.

密閉構造体１内が上記のような圧力になると、図６における矢示のように前記透視窓体６の外周面とベースリング３の内周面との間隙Ｇを経た上記密閉構造体１からの流体圧力で、前記弾性パッキング７が、その圧入摩擦に抗し透視窓体６の外周面に沿って上動し、同図６のようにほぼ矩形に圧縮変形した状態で、前記透視窓体６の外周面と、前記拡径凹所４の周面と、リングカバー８の突環１０の下面とにそれぞれ満遍なく圧着し、これら各面間における二つの間隙Ｇに弾性パッキング７の変形外面が同図６のように部分的に強く自食い込みすると共に、この自食い込みシール部７Ａで上記間隙Ｇを確実に気密シールでき、このシール力は、上記密閉構造体の内圧が高ければ高い程強くなる。 When the pressure inside the sealed structure 1 is as described above, the sealed structure 1 passes through the gap G between the outer peripheral surface of the transparent window body 6 and the inner peripheral surface of the base ring 3 as indicated by an arrow in FIG. When the elastic packing 7 moves up along the outer peripheral surface of the see-through window 6 against the press-fitting friction and is compressed into a substantially rectangular shape as shown in FIG. 6, the outer peripheral surface of the enlarged diameter recess 4, and the lower surface of the projecting ring 10 of the ring cover 8, and the deformed outer surface of the elastic packing 7 is in two gaps G between these surfaces. As shown in FIG. 6, the self-eating seal portion 7 </ b> A can securely seal the gap G in part, and the sealing force increases as the internal pressure of the sealed structure increases. .

ただし、前記のように各部を構成した本発明による耐圧透視窓のシール装置で、不透明な例えば真空容器などの低圧密閉構造体１内を気密的に透視する場合には、前記透視窓体６の外周面とリングカバー８の内周面との間隙Ｇを経た図７における矢示のような密閉構造体１外の大気圧などの流体圧力で、前記弾性パッキング７を同図７のようにほぼ矩形に圧縮変形させた状態で、透視窓体６の外周面と前記ベースリング３の内周面とに満遍なく圧着させることができ、これら各面間における間隙Ｇに弾性パッキング７が同図７のように部分的に自食い込みし、この自食い込みシール部７Ａで上記間隙Ｇを確実に気密シールでき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 However, in the pressure-resistant see-through window sealing device according to the present invention having the components as described above, when the inside of the opaque low-pressure sealed structure 1 such as a vacuum vessel is airtightly seen, With the fluid pressure such as the atmospheric pressure outside the sealed structure 1 as shown by the arrow in FIG. 7 passing through the gap G between the outer peripheral surface and the inner peripheral surface of the ring cover 8, the elastic packing 7 is almost as shown in FIG. In a state of being compressed and deformed into a rectangle, the outer peripheral surface of the see-through window body 6 and the inner peripheral surface of the base ring 3 can be uniformly crimped, and the elastic packing 7 is provided in the gap G between these surfaces. Thus, the self-eating seal portion 7A can securely seal the gap G, and the sealing force becomes stronger as the internal / external pressure difference of the sealed structure increases.

次に、本発明を実施するための第二の最良な形態例を詳細に説明すると、前記ベースリング３上に図８のように前記拡径凹所４の上部を満遍なく覆って同軸配置した金属などの強靱材で作った中間リング１２を挟んで前記透視窓体６の上部周辺に同図８のように下部突環１０を有しない平坦なリングカバー８を被せ、このカバーをベースリング３に同軸的に前述したように固定した後、前記密閉構造体１に形成した透孔１Ａの周辺に前記ベースリング３の下部周辺を溶着部ｙなどで気密的に図１と同様に取着する。 Next, a second best mode for carrying out the present invention will be described in detail. A metal which is coaxially arranged on the base ring 3 so as to cover the upper part of the enlarged diameter recess 4 uniformly as shown in FIG. A flat ring cover 8 having no lower projecting ring 10 as shown in FIG. 8 is put on the periphery of the transparent window 6 with an intermediate ring 12 made of a tough material such as After being fixed coaxially as described above, the lower periphery of the base ring 3 is attached to the periphery of the through hole 1A formed in the sealed structure 1 in the same manner as in FIG.

上記のように各部を構成することで、前記透視窓体６の外周面とベースリング３の内周面との間隙Ｇを経た図９における矢示のような高圧密閉構造体１からの流体圧力で、前記弾性パッキング７を同図９のようにほぼに矩形に圧縮変形させた状態で、透視窓体６の外周面と、前記拡径凹所４の周面と、前記中間リング１２の下面とに満遍なく圧着でき、これら各面間における間隙Ｇを前述した例と同様に弾性パッキング７の部分的自食い込みシール部７Ａで同図９のように気密シールでき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 By configuring each part as described above, the fluid pressure from the high-pressure sealed structure 1 as shown by the arrow in FIG. 9 passes through the gap G between the outer peripheral surface of the transparent window 6 and the inner peripheral surface of the base ring 3. In the state where the elastic packing 7 is compressed and deformed into a substantially rectangular shape as shown in FIG. 9, the outer peripheral surface of the see-through window body 6, the peripheral surface of the enlarged diameter recess 4, and the lower surface of the intermediate ring 12 The gap G between these surfaces can be hermetically sealed as shown in FIG. 9 by the partially self-engraving seal portion 7A of the elastic packing 7 as in the above-described example. It becomes stronger as the pressure difference between the body and the body increases.

ただし、上記のように各部を構成した本発明による耐圧透視窓のシール装置で、不透明な例えば真空容器などの低圧密閉構造体１内を気密を保ち透視する場合には、前記透視窓体６の外周面とリングカバー８の内周面との間隙Ｇを経た図１０における矢示のような密閉構造体１外の流体圧力で、前記弾性パッキング７を図１０のようにほぼに矩形に圧縮変形させた状態で、透視窓体６の外周面と前記ベースリング３の内周面とに満遍なく変形圧着させることができ、これら各面間における間隙Ｇに弾性パッキング７を同図１０のように部分的に自食い込みさせ、この自食い込みシール部７Ａで上記間隙Ｇを確実に気密シールでき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 However, in the pressure-resistant see-through window sealing device according to the present invention, which is configured as described above, when the inside of the low-pressure sealed structure 1 such as an opaque vacuum container is kept airtight and transparent, The elastic packing 7 is compressed and deformed into a substantially rectangular shape as shown in FIG. 10 by the fluid pressure outside the sealed structure 1 as shown by the arrow in FIG. 10 after passing through the gap G between the outer peripheral surface and the inner peripheral surface of the ring cover 8. In this state, the outer peripheral surface of the see-through window body 6 and the inner peripheral surface of the base ring 3 can be uniformly deformed and pressure-bonded, and the elastic packing 7 is partially formed in the gap G between these surfaces as shown in FIG. The gap G can be reliably hermetically sealed by the self-eating seal portion 7A, and the sealing force becomes stronger as the internal / external pressure difference of the sealed structure increases.

次に、本発明を実施するための第三の最良な形態例を詳細に説明すると、前記ベースリング３における拡径凹所４の代わりに、ベースリング３の内周面中間部分に図１１のような環状溝３Ａを旋盤加工などで形成し、この環状溝内にＯリング状の弾性パッキング７を収納した後、前記透視窓体６の外周面で上記パッキング７をその弾力に抗して圧縮させた状態で、少しずつ環状溝３内に押込しみ、弾性パッキング７を縦長に圧縮させた状態で、透視窓体６を前記内鍔５上に同図１１のように配置すると共に、この透視窓体６の上部周辺に前記リングカバー８を被せてこのカバーをベースリング３に同軸的に固定する。 Next, the third best mode for carrying out the present invention will be described in detail. Instead of the diameter-enlarged recess 4 in the base ring 3, the intermediate portion of the inner peripheral surface of the base ring 3 is shown in FIG. An annular groove 3A is formed by lathe processing, and an O-ring shaped elastic packing 7 is accommodated in the annular groove, and then the packing 7 is compressed against the elasticity of the outer peripheral surface of the transparent window body 6. In this state, the see-through window body 6 is placed on the inner collar 5 as shown in FIG. 11 while being pushed into the annular groove 3 little by little and the elastic packing 7 is compressed vertically. The ring cover 8 is put on the periphery of the upper portion of the window body 6, and this cover is coaxially fixed to the base ring 3.

上記の構成により、透視窓体６の外周面とベースリング３の内周面との間隙Ｇを経た図１２における矢示のような高圧密閉構造体１からの流体圧力で、前記弾性パッキング７をほぼに矩形に圧縮変形させた状態で、その外面を図１２のように前記環状溝３Ａの上面と透視窓体６の外周面とに満遍なく圧着でき、上記各面間における間隙Ｇを弾性パッキング７の部分的自食い込みシール部７Ａで同図１２のように気密シールでき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 With the above configuration, the elastic packing 7 is made to flow by the fluid pressure from the high-pressure sealed structure 1 as shown by the arrow in FIG. 12 through the gap G between the outer peripheral surface of the transparent window body 6 and the inner peripheral surface of the base ring 3. The outer surface of the annular groove 3A and the outer peripheral surface of the see-through window 6 can be uniformly crimped as shown in FIG. The partial self-eating seal portion 7A can perform an airtight seal as shown in FIG. 12, and this sealing force becomes stronger as the internal / external pressure difference of the sealed structure increases.

ただし、上記の耐圧透視窓のシール装置で、不透明な例えば真空容器などの低圧密閉構造体１内を気密を保ち透視する場合は、前記透視窓体６の外周面とリングカバー８の内周面との間隙Ｇを経た図１３における矢示のような密閉構造体１外の流体圧力で、前記弾性パッキング７をほぼに矩形に圧縮変形させた状態で、その外面を図１３のように前記環状溝３Ａの下面と透視窓体６の外周面とに満遍なく圧着させることで、これら各面間における間隙Ｇを弾性パッキング７の部分的自食い込みシール部７Ａで同図１３のように気密シールでき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 However, when the above-described pressure-resistant see-through window sealing device is used to see through the opaque low-pressure sealed structure 1 such as a vacuum vessel while maintaining airtightness, the outer periphery of the see-through window 6 and the inner periphery of the ring cover 8 are used. With the fluid pressure outside the sealed structure 1 as shown by the arrow in FIG. 13 passing through the gap G, the outer surface of the elastic packing 7 is compressed and deformed into a substantially rectangular shape as shown in FIG. By uniformly pressing the lower surface of the groove 3A and the outer peripheral surface of the see-through window body 6, the gap G between these surfaces can be hermetically sealed by the partially self-engraving seal portion 7A of the elastic packing 7 as shown in FIG. This sealing force becomes stronger as the internal / external pressure difference of the sealed structure increases.

前記各実施形態では、ベースリング３を下、リングカバー８を上にし、ベースリング３の下面を密閉構造体１の上部における透孔周辺に気密取着した例について説明したが、密閉構造体１内の高圧流体２を横向きに透視する場合には、ベースリング３を縦向きにして、空の密閉構造体１の側面に設けた覗き孔用透孔周辺に気密取着すればく、その他必要に応じ、密閉構造体の所望個所に設けた透孔周辺にベースリング３を縦・横・斜め、または下向きの状態で気密取着することで、流体２の状態監視や、液面透視もできる。 In each of the above-described embodiments, an example in which the base ring 3 is placed below, the ring cover 8 is placed up, and the lower surface of the base ring 3 is hermetically attached around the through hole in the upper portion of the sealed structure 1 has been described. When the high-pressure fluid 2 in the inside is seen through sideways, the base ring 3 is oriented vertically and airtightly attached to the periphery of the peephole through-hole provided on the side surface of the empty hermetic structure 1. Accordingly, the state of the fluid 2 can be monitored and the liquid level can be seen by attaching the base ring 3 in the vertical, horizontal, diagonal or downward direction around the through hole provided at a desired location of the sealed structure.

本発明における前記密閉構造体１の透孔１Ａの周辺に前記ベースリング３を図１のように接着部ｙなどで同軸的に取着する代わりに、本発明における請求項７および請求項８の発明のように、前記密閉構造体１の透孔１Ａの周辺に前記ベースリング３を図１４のように予め同軸的に一体突設したり、ベースリング３に突設した外鍔３Ｂを図１５のように前記密閉構造体１の透孔周辺に気密保持用ガスケット１４を挟んで同軸的にねじ止め固定することで、密閉構造体に対してベースリングを溶着する必要が無くなったので、現場使用に当たり、その部品管理・組立製造・梱包保管・運搬流通・販売購入・開梱使用・保守点検などのすべての面で、より一層扱い易く、価格的にも有利になる。 In the present invention, instead of coaxially attaching the base ring 3 around the through hole 1A of the hermetic structure 1 with an adhesive portion y as shown in FIG. As in the invention, the base ring 3 is coaxially projected in advance integrally around the through hole 1A of the sealed structure 1 as shown in FIG. 14, or the outer casing 3B projecting from the base ring 3 is shown in FIG. As described above, it is not necessary to weld the base ring to the sealed structure by fixing the gasket 14 coaxially with the airtight holding gasket 14 around the through hole of the sealed structure 1. In terms of parts management, assembly manufacturing, packaging storage, transportation and distribution, sales purchase, unpacking use, maintenance inspection, etc., it is easier to handle and more advantageous in price.

また、本発明における請求項９の発明のように、前記弾性パッキング７の上面に図１６のように隙間塞ぎ用の偏平リング１３を配置することで、透視窓体６の上部外周面における間隙Ｇが大きくても、この間隙Ｇを上記隙間塞ぎ用の偏平リング１３で見掛け上少なくでき、弾性パッキング７の過大な自食い込み変形を防いでその自食い込みシールを容易に確保でき、このシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 Further, as in the ninth aspect of the present invention, by arranging a flat ring 13 for closing the gap on the upper surface of the elastic packing 7 as shown in FIG. Even when the gap G is large, the gap G can be apparently reduced by the flat ring 13 for closing the gap, and excessive self-eating deformation of the elastic packing 7 can be prevented, and the self-eating seal can be easily secured. The greater the internal / external pressure difference of the sealed structure, the stronger it becomes.

本発明における請求項１１の発明のように、前記リングカバー８の内周面に形成した雌ねじ周面１５を図１７のようにベースリング３の外周面に形成した雄ねじ周面１６に締着したり、請求項１２の発明のように、リングカバー８の外周面に形成した雄ねじ周面１６を図１８のようにベースリング３の内周面に形成したに雌ねじ周面１５に締着することで、それぞれリングカバー８をベースリング３に着脱可能に固定できたので、前記実施形態における複数の締め付けボルト１１が不要となり、耐圧透視窓のシール装置としての組立製造・開梱使用・保守点検などの面で、より一層扱い易くなった。 As in the eleventh aspect of the present invention, the female screw peripheral surface 15 formed on the inner peripheral surface of the ring cover 8 is fastened to the male screw peripheral surface 16 formed on the outer peripheral surface of the base ring 3 as shown in FIG. As in the invention of claim 12, the male screw peripheral surface 16 formed on the outer peripheral surface of the ring cover 8 is fastened to the female screw peripheral surface 15 formed on the inner peripheral surface of the base ring 3 as shown in FIG. Since the ring covers 8 can be detachably fixed to the base ring 3 respectively, the plurality of tightening bolts 11 in the above-described embodiment are not necessary, and assembly manufacturing, unpacking use, maintenance inspection, etc., as a sealing device for a pressure-resistant fluoroscopic window. This makes it easier to handle.

本発明による耐圧透視窓のシール装置は、高圧ボイラーや内燃機関とか、深海艇や宇宙船のような各種密閉構造体用の耐圧透視窓のシール装置としても立派に利用でき、そのシール力は、上記密閉構造体の内外圧力差が大きくなる程強くなる。 The pressure-resistant fluoroscopic window sealing device according to the present invention can be used as a pressure-resistant fluoroscopic window sealing device for various sealed structures such as high-pressure boilers, internal combustion engines, and deep-sea boats and spacecrafts. The greater the internal / external pressure difference of the sealed structure, the stronger it becomes.

本発明の実施形態の一例を示す要部縦断立面図The principal part vertical elevation which shows an example of embodiment of this invention 本発明要部を分解した縦断立面図Longitudinal elevational view with parts of the present invention disassembled 本発明要部の組立途中を示す縦断立面図Longitudinal elevation view showing the main part of the present invention during assembly 本発明要部を拡大した縦断立面図Longitudinal elevation of the main part of the present invention 本発明要部の使用状態例を示す部分的拡大縦断立面図Partially enlarged vertical elevation view showing an example of use of the main part of the present invention 図５と状態を異にした部分的拡大縦断立面図Fig. 5 is a partially enlarged vertical elevational view in a different state. 図６と状態を異にした部分的拡大縦断立面図Fig. 6 is a partially enlarged vertical elevational view in a different state. 本発明の実施形態の他の例を示す要部縦断立面図The principal part vertical elevation which shows the other example of embodiment of this invention 図８に示すものの使用状態例を示す部分的拡大縦断立面図FIG. 8 is a partially enlarged vertical elevational view showing an example of the usage state of what is shown in FIG. 図９と状態を異にした部分的拡大縦断立面図Fig. 9 is a partially enlarged vertical elevation with a different state. 本発明の実施形態のさらに他の例を示す要部縦断立面図The principal part vertical elevation which shows the further another example of embodiment of this invention 図１１に示すものの使用状態例を示す部分的拡大縦断立面図FIG. 11 is a partially enlarged vertical elevational view showing an example of the usage state of what is shown in FIG. 図１２と状態を異にした部分的拡大縦断立面図FIG. 12 is a partially enlarged vertical elevation view in a different state from FIG. 図１に示すものの他の例を示す縦断立面図Vertical elevation view showing another example of what is shown in FIG. 図１に示すもののさらに他の例を示す縦断立面図Vertical elevation view showing still another example of the one shown in FIG. 本発明要部の他の使用状態例を示す部分的拡大縦断立面図Partially enlarged vertical elevation view showing another example of use of the main part of the present invention 図４に示すものの他の例を示す縦断立面図Vertical elevation view showing another example of what is shown in FIG. 図４に示すもののさらに他の例を示す縦断立面図Vertical elevation view showing still another example of what is shown in FIG.

符号の説明Explanation of symbols

１密閉構造体
１Ａ覗き孔用透孔
２高圧流体
３ベースリング
３Ａ環状溝
３Ｂ外鍔
４拡径凹所
５ベースリングの内鍔
６透視窓体
７弾性パッキング
７Ａ自食い込みシール部
８リングカバー
９リングカバーの内鍔
１０突環
１１締め付けボルト
１２中間リング
１３偏平リング
１４気密保持用ガスケット
１５雌ねじ周面
１６雄ねじ周面
Ｇ透視窓体周辺の間隙
ｙ溶着部（接着部） DESCRIPTION OF SYMBOLS 1 Sealing structure 1A Penetration hole 2 High-pressure fluid 3 Base ring 3A Annular groove 3B Outer flange 4 Enlarged recess 5 Inner collar 6 of base ring Transparent window body 7 Elastic packing 7A Self-eating seal part 8 Ring cover 9 Ring Inner flange 10 of cover 11 Tightening bolt 12 Intermediate ring 13 Flat ring 14 Gastight retaining gasket 15 Female thread peripheral surface 16 Male thread peripheral surface G Clearance around the transparent window body y welded part (adhesive part)

Claims

不透明な高圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面の上下にそれぞれ拡径凹所と内鍔を形成し、この内鍔上に配置した透視窓体の外周面と前記拡径凹所の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記透視窓体の上部周辺に強靱なリングカバーの内鍔を被せつつ、このカバーの下部に突設した突環の下面を前記ベースリングの上面に対接させると共に、前記拡径凹所を覆ってリングカバーをベースリングに同軸的に固定してなり、前記透視窓体の外周面とベースリングの内周面との間隙を経た流体圧力で、前記弾性パッキングを透視窓体の外周面に沿わせて押し動かし、その外面を透視窓体の外周面と、前記拡径凹所の周面と、リングカバーの突環下面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant see-through window that hermetically sees through the interior of an opaque high-pressure sealed structure, the diameter-enlarged depressions are respectively above and below the inner peripheral surface of a tough base ring that is hermetically attached around the through-hole of the sealed structure. And an O-ring elastic packing is deformed against the elasticity between the outer peripheral surface of the see-through window body and the peripheral surface of the enlarged diameter recess. The inner ring of a tough ring cover is put on the periphery of the upper part of the fluoroscopic window body, the lower surface of the projecting ring protruding from the lower part of the cover is brought into contact with the upper surface of the base ring, A ring cover is coaxially fixed to the base ring so as to cover the enlarged-diameter recess, and the elastic packing is inserted into the transparent window by fluid pressure passing through a gap between the outer peripheral surface of the transparent window body and the inner peripheral surface of the base ring. Push along the outer peripheral surface of the body and pass through the outer surface By uniformly deforming and pressing the outer peripheral surface of the window body, the peripheral surface of the above-mentioned enlarged diameter recess, and the lower surface of the ring ring of the ring cover, the gap between these surfaces can be hermetically sealed by the self-eating seal part of the elastic packing. A pressure-resistant transparent window sealing device.

不透明な低圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面の上下にそれぞれ拡径凹所と内鍔を形成し、この内鍔上に配置した透視窓体の外周面と前記拡径凹所の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記透視窓体の上部周辺に強靱なリングカバーの内鍔を被せつつ、このカバーの下部に突設した突環の下面を前記ベースリングの上面に対接させると共に、前記拡径凹所を覆って前記カバーをベースリングに同軸的に固定してなり、前記透視窓体の外周面とリングカバーの内周面との間隙を経た流体圧力で、前記弾性パッキングを透視窓体の外周面と前記ベースリングの内周面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant see-through window that hermetically sees through the inside of an opaque low-pressure sealed structure, the diameter-increasing depressions are respectively formed above and below the inner peripheral surface of a tough base ring that is hermetically attached around the through hole of the sealed structure. And an O-ring elastic packing is deformed against the elasticity between the outer peripheral surface of the see-through window body and the peripheral surface of the enlarged diameter recess. The inner ring of a tough ring cover is put on the periphery of the upper part of the fluoroscopic window body, the lower surface of the projecting ring protruding from the lower part of the cover is brought into contact with the upper surface of the base ring, Covering the expansion recess, the cover is coaxially fixed to the base ring, and the elastic packing is inserted into the transparent window by fluid pressure passing through a gap between the outer peripheral surface of the transparent window body and the inner peripheral surface of the ring cover. Uniform on the outer peripheral surface of the body and the inner peripheral surface of the base ring By deforming crimping, sealing device breakdown voltage transparent window which enables hermetically sealed with self-biting sealing portion of the elastic packing a gap between these surfaces.

不透明な高圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面の上下にそれぞれ拡径凹所と内鍔を形成し、この内鍔上に配置した透視窓体の外周面と前記拡径凹所の周面との間にＯリング状弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記ベースリング上に同軸配置した中間リングの下面で前記拡径凹所を覆って前記透視窓体の上部周辺に強靱なリングカバーを被せ、このカバーをベースリングに同軸的に固定してなり、前記透視窓体の外周面とベースリングの内周面との間隙を経た流体圧力で、前記弾性パッキングを透視窓体の外周面と、前記拡径凹所の周面と、前記中間リングの下面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant see-through window that hermetically sees through the interior of an opaque high-pressure sealed structure, the diameter-enlarged depressions are respectively above and below the inner peripheral surface of a tough base ring that is hermetically attached around the through-hole of the sealed structure. And an inner ring is formed, and an O-ring elastic packing is deformed against the elasticity between the outer peripheral surface of the see-through window disposed on the inner flange and the peripheral surface of the enlarged recess, and moves up and down. Cover the expansion recess with the lower surface of the intermediate ring coaxially arranged on the base ring, and cover the upper part of the fluoroscopic window body with a tough ring cover, and this cover is coaxial with the base ring. The elastic packing is formed by fixing the elastic packing through the gap between the outer peripheral surface of the fluoroscopic window body and the inner peripheral surface of the base ring, and the outer peripheral surface of the fluoroscopic window body, and the peripheral surface of the enlarged diameter recess, By uniformly deforming and crimping to the lower surface of the intermediate ring Sealing device breakdown voltage transparent window which enables hermetically sealed with self-biting sealing portion of the elastic packing a gap between these surfaces.

不透明な低圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面の上下にそれぞれ拡径凹所と内鍔を形成し、この内鍔上に配置した透視窓体の外周面と前記拡径凹所の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入し、前記ベースリング上に同軸配置した中間リングの下面で前記拡径凹所を覆って前記透視窓体の上部周辺に強靱なリングカバーを被せると共に、このカバーをベースリングに同軸的に固定してなり、前記透視窓体の外周面と中間リングの内周面との間隙を経た流体圧力で前記弾性パッキングを透視窓体の外周面と前記拡径凹所の内面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant see-through window that hermetically sees through the inside of an opaque low-pressure sealed structure, the diameter-increasing depressions are respectively formed above and below the inner peripheral surface of a tough base ring that is hermetically attached around the through hole of the sealed structure. And an O-ring elastic packing is deformed against the elasticity between the outer peripheral surface of the see-through window body and the peripheral surface of the enlarged diameter recess. Cover the expansion recess by the lower surface of the intermediate ring coaxially arranged on the base ring, and cover the upper part of the transparent window body with a tough ring cover, and this cover is coaxial with the base ring. The elastic packing is uniformly distributed between the outer peripheral surface of the fluoroscopic window body and the inner surface of the enlarged-diameter recess by fluid pressure passing through the gap between the outer peripheral surface of the transparent window body and the inner peripheral surface of the intermediate ring. It can be placed between these surfaces by deforming and crimping. Sealing device breakdown voltage transparent window which enables hermetically sealed with self-biting sealing portion of the elastic packing gap.

不透明な高圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面に環状溝と内鍔を形成し、前記透視窓体の外周面と前記環状溝の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入した状態で前記透視窓体を前記内鍔上に配置すると共に、この透視窓体の上部周辺に強靱なリングカバーを被せてベースリングに同軸的に固定してなり、前記透視窓体の外周面とベースリングの内周面との間隙を経た流体圧力で、前記弾性パッキングを前記環状溝の上面と透視窓体の外周面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant fluoroscopic window that hermetically sees through the inside of an opaque high-pressure sealed structure, an annular groove and an inner collar are formed on the inner peripheral surface of a tough base ring that is hermetically attached around the through-hole of the sealed structure. The transparent window body is formed in a state in which an O-ring-shaped elastic packing is deformed against its elasticity and press-fitted so as to move up and down between the outer peripheral surface of the transparent window body and the peripheral surface of the annular groove. It is arranged on the inner rim and is covered with a tough ring cover around the upper part of the transparent window body, and is coaxially fixed to the base ring, and the outer peripheral surface of the transparent window body and the inner peripheral surface of the base ring are The elastic packing is uniformly deformed and pressure-bonded to the upper surface of the annular groove and the outer peripheral surface of the transparent window body by fluid pressure passing through the gap, and the gap between these surfaces can be hermetically sealed by the self-engaging seal portion of the elastic packing. Pressure-resistant fluoroscopic windows Sealing device.

不透明な低圧密閉構造体の内部を気密的に透視する耐圧透視窓のシール装置において、前記密閉構造体の透孔周辺に気密取着する強靱なベースリングの内周面に環状溝と内鍔を形成し、前記透視窓体の外周面と前記環状溝の周面との間にＯリング状の弾性パッキングをその弾力に抗し変形させて上下動可能に圧入した状態で前記透視窓体を前記内鍔上に配置すると共に、この透視窓体の上部周辺に強靱なリングカバーを被せてベースリングに同軸的に固定してなり、前記透視窓体の外周面とリングカバーの内周面との間隙を経た流体圧力で、前記弾性パッキングを前記環状溝の下面と透視窓体の外周面とに満遍なく変形圧着させることで、これら各面間における間隙を弾性パッキングの自食い込みシール部で気密シール可能にした耐圧透視窓のシール装置。 In a sealing device for a pressure-resistant see-through window that hermetically sees through the inside of an opaque low-pressure sealed structure, an annular groove and an inner collar are formed on the inner peripheral surface of a tough base ring that is hermetically attached around the through-hole of the sealed structure. The transparent window body is formed in a state in which an O-ring-shaped elastic packing is deformed against its elasticity and press-fitted so as to move up and down between the outer peripheral surface of the transparent window body and the peripheral surface of the annular groove. It is placed on the inner rim, and a tough ring cover is placed around the upper part of the fluoroscopic window body and is coaxially fixed to the base ring, and the outer peripheral surface of the fluoroscopic window body and the inner peripheral surface of the ring cover The elastic packing is uniformly deformed and pressure-bonded to the lower surface of the annular groove and the outer peripheral surface of the transparent window body by fluid pressure passing through the gap, and the gap between these surfaces can be hermetically sealed by the self-engaging seal portion of the elastic packing. Pressure-resistant fluoroscopic windows Sealing device.

前記密閉構造体の透孔周辺に前記ベースリングを一体突設してなる請求項１から請求項６までのいずれか一つの請求項に記載の耐圧透視窓のシール装置。 The pressure-resistant fluoroscopic window sealing device according to any one of claims 1 to 6, wherein the base ring is integrally protruded around the through hole of the sealed structure.

前記ベースリングを前記密閉構造体の透孔周辺に同軸的に気密固定するに当たり、ベースリングに突設した外鍔を前記密閉構造体の透孔周辺に気密保持用ガスケットを挟んで同軸的にねじ止め固定してなる請求項１から請求項６までのいずれか一つの請求項に記載の耐圧透視窓のシール装置。 When the base ring is coaxially and airtightly fixed around the through hole of the sealed structure body, the outer casing protruding from the base ring is screwed coaxially with an airtight holding gasket interposed around the through hole of the sealed structure body. The sealing device for a pressure-resistant fluoroscopic window according to any one of claims 1 to 6, wherein the sealing device is fixed.

前記弾性パッキングの上面に隙間塞ぎ用の偏平リングを同軸的に配置してなる請求項１から請求項８までのいずれか一つの請求項に記載の耐圧透視窓のシール装置。 The sealing device for a pressure-resistant fluoroscopic window according to any one of claims 1 to 8, wherein a flat ring for closing a gap is coaxially disposed on an upper surface of the elastic packing.

前記リングカバーをベースリングに同軸的に固定するに当たり、前記リングカバー周辺をベースリングの周辺に着脱可能にねじ止め固定してなる請求項１から請求項９までのいずれか一つの請求項に記載の耐圧透視窓のシール装置。 10. The ring cover according to any one of claims 1 to 9, wherein when the ring cover is coaxially fixed to the base ring, the periphery of the ring cover is detachably screwed to the periphery of the base ring. Pressure-resistant fluoroscopic window seal device.

前記リングカバーをベースリングに同軸的に固定するに当たり、前記リングカバーの内周面に形成した雌ねじをベースリングの外周面に形成した雄ねじに着脱可能に締着してなる請求項１から請求項９までのいずれかに記載の耐圧透視窓のシール装置。 The first and second embodiments of the present invention are characterized in that when the ring cover is coaxially fixed to the base ring, a female screw formed on the inner peripheral surface of the ring cover is detachably fastened to a male screw formed on the outer peripheral surface of the base ring. 10. A pressure-resistant fluoroscopic window sealing device according to any one of items 9 to 9.

前記リングカバーをベースリングに同軸的に固定するに当たり、前記リングカバーの外周面に形成した雄ねじをベースリングの上部内周面に形成したに雌ねじに着脱可能に締着してなる請求項１から請求項９までのいずれかに記載の耐圧透視窓のシール装置。 2. To fix the ring cover coaxially to the base ring, a male screw formed on the outer peripheral surface of the ring cover is formed on the upper inner peripheral surface of the base ring and is detachably fastened to the female screw. The sealing device for a pressure-resistant fluoroscopic window according to any one of claims 9 to 10.