JPH09287662A - Hollow O-ring - Google Patents
Hollow O-ringInfo
- Publication number
- JPH09287662A JPH09287662A JP12232696A JP12232696A JPH09287662A JP H09287662 A JPH09287662 A JP H09287662A JP 12232696 A JP12232696 A JP 12232696A JP 12232696 A JP12232696 A JP 12232696A JP H09287662 A JPH09287662 A JP H09287662A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- hollow
- gasket
- sealing property
- expanded graphite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Gasket Seals (AREA)
Abstract
(57)【要約】
【課題】 ゴムＯ−リングの耐熱性を改善すると共に渦
巻形ガスケットのシール性等を改良した中空Ｏ−リング
を提供することである。
【解決手段】 金属中空Ｏ−リング１の外周面に、少な
くとも部分的に膨張黒鉛テープの被覆層２を設ける。こ
れによりゴムＯ−リングの耐熱性の欠陥が改善され、ま
た渦巻形ガスケットのシール性が向上する。
(57) [PROBLEMS] To provide a hollow O-ring in which the heat resistance of a rubber O-ring is improved and the sealing property of a spiral gasket is improved. A coating layer (2) of expanded graphite tape is provided at least partially on the outer peripheral surface of a metal hollow O-ring (1). This improves the heat resistance defect of the rubber O-ring and improves the sealing property of the spiral gasket.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は機器類の中空Ｏ−
リング、特に低締付け荷重でシール性を要求され、かつ
高温雰囲気にさらされる、例えば、真空脱ガス槽用のガ
スケットとして使用すると最適な中空Ｏ−リングに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow O-
The present invention relates to a ring, particularly a hollow O-ring that is required to have a sealing property under a low tightening load and is exposed to a high temperature atmosphere, and is optimal for use as a gasket for a vacuum degassing tank, for example.
【０００２】[0002]
【従来の技術】従来、製鉄所等の真空脱ガス槽用ガスケ
ットとして、ゴムＯ−リングや、図２に示す渦巻形ガス
ケットが使用されている。図２において、３は渦巻形ガ
スケット本体、４は内輪、５は外輪である。2. Description of the Related Art Conventionally, a rubber O-ring or a spiral gasket shown in FIG. 2 has been used as a gasket for a vacuum degassing tank in an iron mill or the like. In FIG. 2, 3 is a spiral gasket body, 4 is an inner ring, and 5 is an outer ring.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のゴムＯ−リングや渦巻形ガスケットにあって
は、前者は耐熱性に乏しく、２００℃以上では一般的に
は使用できないため、使用範囲が狭い。また、内部温度
が２００℃以上で使用する場合は、２００℃以下にする
ためフランジの水冷が必要となり、フランジ構造の複雑
化及び水冷用設備設置等の大幅な設備改造が必要とな
る。さらに、高温溶融物の真上で水を使用するため、安
全上の問題も内包している。後者では締付け荷重が十分
でなく、また稼働中での荷重変化があり、シール性に問
題があった。また、構造も複雑で取扱い時に内輪４、外
輪５が外れる等の問題もあった。However, in such a conventional rubber O-ring or spiral type gasket, the former has poor heat resistance and cannot be generally used at 200 ° C. or higher, so that it can be used in a range of use. Is narrow. Further, when the internal temperature is used at 200 ° C. or higher, water cooling of the flange is required in order to keep the temperature at 200 ° C. or lower, which requires a complicated structure of the flange and major facility modification such as installation of water cooling equipment. Further, since water is used just above the high temperature melt, there is a safety problem. In the latter case, the tightening load was not sufficient, and the load changed during operation, and there was a problem with the sealability. Further, the structure is complicated and there is a problem that the inner ring 4 and the outer ring 5 come off during handling.
【０００４】本発明の目的は従来のゴムＯ−リングや渦
巻形ガスケットに上述した問題点を解決した中空Ｏ−リ
ングを提供することにある。An object of the present invention is to provide a hollow O-ring which solves the above-mentioned problems in conventional rubber O-rings and spiral gaskets.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の中空Ｏ−リングは、金属中空Ｏ−リングの
外周面を、可とう性の膨張黒鉛テープで少なくとも部分
的に被覆したことを要旨とする。本発明の中空Ｏ−リン
グにおいて、前記Ｏ−リングは、そのバネ定数を３．０
〜４．５×１０3ｋｇｆ／ｍｍとしてもよい。或いはそ
の許容圧縮率が２０〜７０％としてもよい。In order to achieve the above object, the hollow O-ring of the present invention is such that the outer peripheral surface of the metal hollow O-ring is at least partially covered with a flexible expanded graphite tape. Is the gist. In the hollow O-ring of the present invention, the O-ring has a spring constant of 3.0.
It may be up to 4.5 × 10 3 kgf / mm. Alternatively, the allowable compression rate may be 20 to 70%.
【０００６】[0006]
【発明の実施の形態】本発明の実施の形態としては、従
来のゴムＯ−リングの耐熱性の改善として、例えばＳＵ
Ｓ３０４等の金属中空Ｏ−リングを使用する。また、渦
巻形ガスケットのシール性を改善するために、上記金属
中空Ｏ−リングの外周面に、可とう性の膨張黒鉛テープ
を少なくとも部分的に被覆する。BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, as an improvement in heat resistance of a conventional rubber O-ring, for example, SU
A hollow metal O-ring such as S304 is used. Further, in order to improve the sealing property of the spiral gasket, the outer peripheral surface of the metal hollow O-ring is at least partially covered with a flexible expanded graphite tape.
【０００７】[0007]
【実施例】以下、この発明を図面に示す実施例に基づい
て説明する。図１は、本発明の中空Ｏ−リングの断面を
示すものである。同図において、ＳＵＳ３０４の中空Ｏ
−リング（線径１５ｍｍ、肉厚１．５ｍｍ）１の外周面
に、シール性、耐熱性に富んだ膨張黒鉛テープ（幅１
２．７ｍｍ、厚さ０．３８ｍｍ）を粘着剤により、貼り
付けた被覆層２からなるものである。被覆層２はシール
性向上のため、最低限フランジとＯ−リングの接触面に
設けるのが望ましい。図１では被覆層２は部分的に設け
られているが、Ｏ−リング１の外周面全体に設けてもよ
い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the drawings. FIG. 1 shows a cross section of a hollow O-ring of the present invention. In the figure, hollow O of SUS304
-Expanded graphite tape (width 1) with excellent sealability and heat resistance on the outer peripheral surface of the ring (wire diameter 15 mm, wall thickness 1.5 mm) 1.
The coating layer 2 has a thickness of 2.7 mm and a thickness of 0.38 mm and is adhered with an adhesive. The coating layer 2 is preferably provided at least on the contact surface between the flange and the O-ring in order to improve the sealing property. Although the coating layer 2 is partially provided in FIG. 1, it may be provided on the entire outer peripheral surface of the O-ring 1.
【０００８】この発明による中空Ｏ−リングは耐熱性、
圧縮性を有するＳＵＳ３０４等の金属中空Ｏ−リング１
と、可とう性の膨張黒鉛テープ２とからなるものである
ため、従来より、耐熱性に富み、また低締付け荷重でも
フランジに馴染むため、シール性が大幅に改善されるも
のである。加えて、圧縮性に富む（圧縮量を多くとれ
る）ため、歪、平行度不良等のフランジに使用してもこ
れにも追従し易く、既設の大口径フランジに使用しても
十分なシール性が期待できる。The hollow O-ring according to the invention is heat resistant,
Metallic hollow O-ring 1 such as SUS304 having compressibility
Since it is composed of the flexible expanded graphite tape 2 and has a high heat resistance as compared with the conventional one, and it fits in the flange even under a low tightening load, the sealing property is greatly improved. In addition, since it is highly compressible (it can take a large amount of compression), it is easy to follow this even if it is used for flanges with distortion, poor parallelism, etc., and sufficient sealing performance even when used for existing large diameter flanges Can be expected.
【０００９】なお、金属中空Ｏ−リング１として、その
線径を略１５ｍｍ、肉厚を略１．５ｍｍ等にした場合
は、圧縮量が５ｍｍ以上とれるため、歪、平行度不良等
のフランジに使用してもこれにも追従し易く、既設の大
口径フランジ等にも十分シール性を発揮し、使用でき
る。また膨張黒鉛テープ２は厚さが０．２５〜１．０ｍ
ｍのものを使用するのがシール性の点から望ましい。When the wire diameter of the metal hollow O-ring 1 is about 15 mm and the wall thickness is about 1.5 mm, the compression amount can be 5 mm or more, so that it can be applied to the flange such as distortion and poor parallelism. Even if it is used, it can easily follow this, and it can be used with sufficient sealing performance even for existing large diameter flanges. The expanded graphite tape 2 has a thickness of 0.25 to 1.0 m.
It is desirable to use m of m from the viewpoint of sealing property.
【００１０】上記実施例において、中空Ｏ−リング１の
バネ定数ｋは、３．０〜４．５×１０3ｋｇｆ／ｍｍで
あるのが好適である。シールに必要な線荷重を満足する
ための中空Ｏ−リングのバネ定数ｋは３．０〜４．５×
１０3ｋｇｆ／ｍｍである。しかるに、従来の耐熱ガス
ケットの渦巻形ガスケットでは、ｋ＝３．２〜４．５×
１０5ｋｇｆ／ｍｍと本中空Ｏ−リングの約１００倍で
ある。このことは、本中空Ｏ−リングは非常に圧縮性が
良好（圧縮され易い）であることを示している。ｋが
３．０未満の場合は、スプリング力（反力）が小さくな
るため、シールに要する線荷重が得られなく、相手フラ
ンジとの馴染みが不充分で、シール性が低下する。一
方、ｋが４．５を越えた場合は、所定荷重での圧縮量お
よび復元量が少なくなるため、本中空Ｏ−リングの特長
の１つである、フランジ歪の吸収性が低下するため、熱
サイクルや稼働中での荷重変化に追従できなくなり、シ
ール性が不安定になる。In the above embodiment, the hollow O-ring 1 preferably has a spring constant k of 3.0 to 4.5 × 10 3 kgf / mm. The spring constant k of the hollow O-ring for satisfying the line load required for sealing is 3.0 to 4.5 ×
It is 10 3 kgf / mm. However, in the conventional spiral wound gasket of heat resistant gasket, k = 3.2 to 4.5 ×
It is 10 5 kgf / mm, which is about 100 times that of the hollow O-ring. This indicates that the hollow O-ring has very good compressibility (it is easily compressed). When k is less than 3.0, the spring force (reaction force) becomes small, so that the linear load required for sealing cannot be obtained, the conformity with the mating flange is insufficient, and the sealing performance deteriorates. On the other hand, when k exceeds 4.5, the amount of compression and the amount of restoration under a predetermined load are reduced, and the absorbability of flange strain, which is one of the features of the hollow O-ring, is reduced. It becomes impossible to follow the load change during heat cycle or operation, and the sealing property becomes unstable.
【００１１】更に中空Ｏ−リング１はその許容圧縮率が
２０〜７０％であると、なお一層有効である。中空Ｏ−
リング１の許容圧縮率が２０〜７０％と非常に範囲が広
いと、大口径等でフランジに変形、歪があっても、本中
空Ｏ−リングの圧縮量で吸収できる効果がある。具体的
に例示すると、中空Ｏ−リング１の線径が１５ｍｍの場
合、許容圧縮量が３〜１０．５ｍｍとなり、従来の耐熱
性ガスケットである渦巻形ガスケット（厚さ６．４ｍ
ｍ）の０．８〜２ｍｍ程度に比較しても、非常に許容圧
縮量範囲が広いことが分かる。圧縮率が２０％未満の場
合は、シールに必要な線荷重が得られなく、ガスシール
ができないことが確認されている。一方、７０％を越え
た場合は、中空Ｏ−リング１が弾性限界を越え降伏する
ため、復元性が極端に低下し、熱サイクルや稼働中での
荷重変化に追従できなくなり、シール性が期待できなく
なる。本中空Ｏ−リングは圧縮率２０％でシールできる
が、この時の線荷重は１４３ｋｇｆ／ｃｍである。これ
に対し、従来の渦巻形ガスケット（最もシール性良好、
低面圧でシールできる膨張黒鉛フィラーの）では３７５
ｋｇｆ／ｃｍと２．５倍以上の荷重を必要とする。Further, the hollow O-ring 1 is even more effective when the allowable compression rate thereof is 20 to 70%. Hollow O-
When the permissible compression rate of the ring 1 is 20 to 70%, which is extremely wide, even if the flange is deformed or distorted due to a large diameter or the like, it can be absorbed by the compression amount of the hollow O-ring. As a specific example, when the wire diameter of the hollow O-ring 1 is 15 mm, the allowable compression amount is 3 to 10.5 mm, which is a conventional heat-resistant gasket, which is a spiral gasket (thickness: 6.4 m).
It can be seen that the permissible compression amount range is extremely wide even when compared with m) of about 0.8 to 2 mm. It has been confirmed that when the compressibility is less than 20%, the line load required for sealing cannot be obtained and gas sealing cannot be performed. On the other hand, when it exceeds 70%, the hollow O-ring 1 yields beyond the elastic limit, so that the resilience is extremely reduced, and it becomes impossible to follow the load change during the heat cycle or operation, and the sealing property is expected. become unable. The hollow O-ring can be sealed at a compression rate of 20%, but the linear load at this time is 143 kgf / cm. On the other hand, the conventional spiral gasket (the best sealability,
375 for expanded graphite filler that can be sealed with low surface pressure
It requires kgf / cm and a load of 2.5 times or more.
【００１２】図３に本実施例の中空Ｏ−リングの圧縮量
８．３ｍｍでの圧縮復元曲線を示す。従来の渦巻形ガス
ケットは持ち運び時、内輪、外輪の脱落頻度が多く、取
扱いが困難であった。本中空Ｏ−リングでは、その持ち
運び時のＯ−リング本体に破損がない上、例えば、熱可
塑性のフィルムで包むことにより、取扱いを容易にする
ことができる。例えば、上記フィルムを装着したままの
Ｏ−リングをフランジへ取り付け、実際に操業を実施し
た結果、シール性には何らの影響がないことが確認でき
た。FIG. 3 shows a compression recovery curve of the hollow O-ring of this embodiment at a compression amount of 8.3 mm. The conventional spiral gasket was difficult to handle because the inner ring and the outer ring frequently dropped when being carried. In the hollow O-ring, the O-ring main body is not damaged when being carried, and it can be easily handled by wrapping it with a thermoplastic film, for example. For example, it was confirmed that the O-ring with the above film attached was attached to the flange and the operation was actually carried out, so that there was no influence on the sealing property.
【００１３】[0013]
【発明の効果】以上説明してきたように、この発明によ
れば、中空Ｏ−リングの構成を耐熱性、圧縮性を有した
ステンレス鋼等の金属中空Ｏ−リングのガスケット本体
と、その表面被覆材を可とう性の膨張黒鉛テープとから
成るものとしたため、従来のゴムＯ−リングの耐熱性の
欠陥を改善し、また従来の渦巻形ガスケットのシール性
および内輪、外輪の脱落等の取扱い上の欠陥を改善でき
るという効果が得られる。As described above, according to the present invention, the hollow O-ring has a heat-resistant and compressible metal hollow O-ring gasket body of metal such as stainless steel, and its surface coating. Since the material is made of flexible expanded graphite tape, the defect of heat resistance of the conventional rubber O-ring is improved, and the sealing property of the conventional spiral gasket and the handling of the inner ring and the outer ring are removed. The effect that the defect of 1 can be improved is acquired.
【図１】本発明による中空Ｏ−リングの横断面図であ
る。1 is a cross-sectional view of a hollow O-ring according to the present invention.
【図２】従来の渦巻形ガスケットの横断面図である。FIG. 2 is a cross-sectional view of a conventional spiral gasket.
【図３】図１の中空Ｏ−リングの圧縮復元曲線を示す。3 shows a compression recovery curve of the hollow O-ring of FIG.
１ 金属中空Ｏ−リング ２ 被覆層（膨張黒鉛テープ） ３ ガスケット本体 ４ 内輪 ５ 外輪 1 Metal Hollow O-Ring 2 Coating Layer (Expanded Graphite Tape) 3 Gasket Main Body 4 Inner Ring 5 Outer Ring
フロントページの続き (72)発明者 本多 清之 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 清永 辛治 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 徳丸 健一 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内Front Page Continuation (72) Inventor Kiyoyuki Honda 1st Nishinosu, Oita-shi, Oita Shin-Nippon Steel Co., Ltd. Inside Oita Works (72) Inventor, Seiji Kiyonaga 1st Nishinosu, Oita-shi, Oita Pref. (72) Kenichi Tokumaru, Oita City, Oita Prefecture, Nishinosu, Oita, Japan (72) Nippon Steel Co., Ltd. Oita Steel Works, Ltd.
Claims (3)
性の膨張黒鉛テープで少なくとも部分的に被覆したこと
を特徴とする中空Ｏ−リング。1. A hollow O-ring, characterized in that the outer peripheral surface of the metal hollow O-ring is at least partially covered with a flexible expanded graphite tape.
３.０〜４.５×１０3ｋｇｆ／ｍｍであることを特徴と
する請求項１に記載の中空Ｏ−リング。2. The hollow O-ring according to claim 1, wherein the metal hollow O-ring has a spring constant of 3.0 to 4.5 × 10 3 kgf / mm.
２０〜７０％であることを特徴とする請求項１または２
に記載の中空Ｏ−リング。3. The permissible compression rate of the hollow metal O-ring is 20 to 70%.
Hollow O-ring according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12232696A JP3490568B2 (en) | 1996-04-19 | 1996-04-19 | How to attach a hollow O-ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12232696A JP3490568B2 (en) | 1996-04-19 | 1996-04-19 | How to attach a hollow O-ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09287662A true JPH09287662A (en) | 1997-11-04 |
| JP3490568B2 JP3490568B2 (en) | 2004-01-26 |
Family
ID=14833207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12232696A Expired - Lifetime JP3490568B2 (en) | 1996-04-19 | 1996-04-19 | How to attach a hollow O-ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3490568B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011075095A (en) * | 2009-10-02 | 2011-04-14 | Nichias Corp | Spiral gasket |
| CN105090497A (en) * | 2015-08-20 | 2015-11-25 | 无锡中强电碳有限公司 | Graphite sealing ring |
| CN108458112A (en) * | 2018-03-27 | 2018-08-28 | 苏州宝骅密封科技股份有限公司 | High temperature high voltage resistant sealing ring |
| CN108591457A (en) * | 2018-03-27 | 2018-09-28 | 苏州宝骅密封科技股份有限公司 | A kind of high-temperature and high-presure resistent seal assembly |
| CN112300522A (en) * | 2019-07-23 | 2021-02-02 | 北京光明橡塑制品厂 | Metal hollow fiber composite high-temperature rubber sealing material |
-
1996
- 1996-04-19 JP JP12232696A patent/JP3490568B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011075095A (en) * | 2009-10-02 | 2011-04-14 | Nichias Corp | Spiral gasket |
| CN105090497A (en) * | 2015-08-20 | 2015-11-25 | 无锡中强电碳有限公司 | Graphite sealing ring |
| CN108458112A (en) * | 2018-03-27 | 2018-08-28 | 苏州宝骅密封科技股份有限公司 | High temperature high voltage resistant sealing ring |
| CN108591457A (en) * | 2018-03-27 | 2018-09-28 | 苏州宝骅密封科技股份有限公司 | A kind of high-temperature and high-presure resistent seal assembly |
| CN112300522A (en) * | 2019-07-23 | 2021-02-02 | 北京光明橡塑制品厂 | Metal hollow fiber composite high-temperature rubber sealing material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3490568B2 (en) | 2004-01-26 |
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