JPS628687Y2 - - Google Patents
Info
- Publication number
- JPS628687Y2 JPS628687Y2 JP1981079576U JP7957681U JPS628687Y2 JP S628687 Y2 JPS628687 Y2 JP S628687Y2 JP 1981079576 U JP1981079576 U JP 1981079576U JP 7957681 U JP7957681 U JP 7957681U JP S628687 Y2 JPS628687 Y2 JP S628687Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- ring
- gasket
- shaped
- band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Gasket Seals (AREA)
Description
【考案の詳細な説明】
本考案はうず巻形ガスケツトの改良に関するも
ので、高温、高圧、特に高腐蝕性を有する流体を
密封するに適したものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a spiral-wound gasket, which is suitable for sealing high temperature, high pressure, and especially highly corrosive fluids.
うず巻形ガスケツトは通常、帯状金属薄板（以
下「フープ」という）と帯状緩衝材（以下「フイ
ラー」という）とを重ね合わせ、うず巻状に捲回
したガスケツト本体と該ガスケツト本体の内側又
は外側、又は両側に配した金属環（内輪、外輪）
とで構成されており、条件により金属環を省略し
て使用されている。このような構成で高温、高圧
の流体に密封は確保されるが、流体が腐蝕性の強
い場合は問題があつた。 A spiral-wound gasket usually consists of a thin metal plate (hereinafter referred to as a ``hoop'') and a band-shaped cushioning material (hereinafter referred to as a ``filler'') stacked on top of each other, forming a spirally wound gasket body and the inside or outside of the gasket body. , or metal rings on both sides (inner ring, outer ring)
Depending on the conditions, the metal ring may be omitted. Although this configuration ensures a tight seal against high-temperature, high-pressure fluids, it poses a problem if the fluid is highly corrosive.
即ち、第２図で説明すればうず巻形ガスケツト
では各層のフープ２ａ，２ｂ…はフランジ面に当
接しているが、特に最内側のフープ２ａとフラン
ジ面８との間には高温高腐蝕性の流体に接するこ
ととも相まつて電気化学的腐蝕が生じる。この腐
蝕によりフープ当接場所のフランジ面に腐蝕溝１
０が出来、そうしてさらに、最後はフランジに応
力腐蝕割れ１１を生じ、密封機能を果たさなくな
る。 That is, as explained in FIG. 2, in the spiral-wound gasket, the hoops 2a, 2b, . Coupled with contact with fluids, electrochemical corrosion occurs. This corrosion caused corrosion grooves 1 on the flange surface where the hoop abuts.
0, and finally stress corrosion cracks 11 occur in the flange, which no longer performs its sealing function.
又、応力腐蝕割れを生じる前にガスケツトを交
換したとしても、フランジ面の平滑性が損われて
いるので、ガスケツトの納りがスムースに行かな
い欠点がある。 Furthermore, even if the gasket is replaced before stress corrosion cracking occurs, the smoothness of the flange surface is impaired, so the gasket does not fit smoothly.
本考案はこれらの問題を解決すべく成されたも
ので、横断面がＷ状またはＶ状をなすフープに帯
形状のフイラーを重ね合わせうず巻状に捲回した
ガスケツト本体の内側に金属環の内輪を配し、該
内輪の内側にフツ素樹脂系シール材環の内々輪を
配するとともに、内輪と内々輪との間に内々輪の
膨張を吸収するクリアランスを設けてなるうず巻
形ガスケツトを提供する。 The present invention was developed to solve these problems.A band-shaped filler is superimposed on a hoop with a W-shaped or V-shaped cross section, and a metal ring is placed inside the gasket body, which is wound in a spiral shape. A spiral-wound gasket is provided with an inner ring, an inner ring of a fluororesin sealing material ring is arranged inside the inner ring, and a clearance is provided between the inner ring and the inner ring to absorb expansion of the inner ring. provide.
以下に図示の実施例に基づいて本考案のガスケ
ツトを説明する。 The gasket of the present invention will be explained below based on the illustrated embodiments.
第１図は本考案のガスケツトの実施例を示す縦
断面図である。フープすなわち帯状金属薄板２と
フイラーすなわち帯状の緩衝材３とを重ね合わ
せ、うず巻状に捲回したガスケツト本体１の外側
に金属環の外輪４を、内側に金属環の内輪５を配
し該内輪５の内側にフツ素樹脂系シール材環の
内々輪６を配してある。そして内輪５と内々輪６
との間に内々輪６の膨張を吸収するクリアランス
７を設けてある。 FIG. 1 is a longitudinal sectional view showing an embodiment of the gasket of the present invention. A hoop or band-shaped thin metal plate 2 and a filler or band-shaped cushioning material 3 are stacked one on top of the other, and an outer ring 4 of a metal ring is placed on the outside of the gasket body 1 which is wound in a spiral manner, and an inner ring 5 of a metal ring is placed inside. An inner ring 6 made of a fluororesin sealing material ring is arranged inside the inner ring 5. And inner circle 5 and inner circle 6
A clearance 7 for absorbing expansion of the inner ring 6 is provided between the inner ring 6 and the inner ring 6.
かく構成したことで流体が直接ガスケツト本体
に接触しないので、腐蝕溝は生ぜず従つてフラン
ジの応力腐蝕割れも生じない。又、フランジ面も
平滑に保たれる。 With this structure, the fluid does not come into direct contact with the gasket body, so no corrosion grooves are formed and stress corrosion cracking of the flange does not occur. Moreover, the flange surface is also kept smooth.
本考案では、上記クリアランス７を設けてある
ことに特徴の一つがある。このクリアランスの大
きさは内々輪として使用する材質の使用温度での
膨張度合により異るが、例えばふつ素樹脂であれ
ば内々輪の外径の１％程度のクリアランス（直径
ベース）があれば良い。 One of the features of the present invention is that the above-mentioned clearance 7 is provided. The size of this clearance varies depending on the expansion degree of the material used for the inner ring at the operating temperature, but for example, if it is made of fluorine resin, a clearance of about 1% of the outer diameter of the inner ring (diameter base) is sufficient. .
第１図は本考案の一実施例を示す縦断面図、第
２図はフランジ面腐蝕のメカニズムの説明図であ
る。
１……ガスケツト本体、２……帯状金属薄板
（フープ）、３……帯状の緩衝材（フイラー）、４
……外輪、５……内輪、６……内々輪、７……ク
リアランス、８，９……フランジ面。
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the mechanism of flange surface corrosion. 1... Gasket body, 2... Band-shaped thin metal plate (hoop), 3... Band-shaped cushioning material (filler), 4
...Outer ring, 5...Inner ring, 6...Inner ring, 7...Clearance, 8, 9...Flange surface.
Claims (1)
帯状の緩衝材を重ね合わせ、うず巻状に捲回した
ガスケツト本体の内側に金属環の内輪を配し、該
内輪の内側にフツ素樹脂系シール材環の内々輪を
配したガスケツトであつて、内輪と内々輪との間
に内々輪の膨張を吸収するクリアランスを設けて
なるうず巻形ガスケツト。 A band-shaped cushioning material is superimposed on a band-shaped thin metal plate with a W-shaped or V-shaped cross section, and an inner ring of a metal ring is arranged inside the gasket body wound in a spiral shape, and a fluorine resin is placed inside the inner ring. This gasket has an inner ring of a sealing material ring, and is a spiral-wound gasket in which a clearance is provided between the inner ring and the inner ring to absorb expansion of the inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981079576U JPS628687Y2 (en) | 1981-05-29 | 1981-05-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981079576U JPS628687Y2 (en) | 1981-05-29 | 1981-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57190964U JPS57190964U (en) | 1982-12-03 |
| JPS628687Y2 true JPS628687Y2 (en) | 1987-02-28 |
Family
ID=29875168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981079576U Expired JPS628687Y2 (en) | 1981-05-29 | 1981-05-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628687Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058961U (en) * | 1983-09-29 | 1985-04-24 | 日本バルカ−工業株式会社 | spiral gasket |
| JP4674055B2 (en) * | 2004-04-27 | 2011-04-20 | 日本バルカー工業株式会社 | gasket |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149656U (en) * | 1979-04-16 | 1980-10-28 |
-
1981
- 1981-05-29 JP JP1981079576U patent/JPS628687Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57190964U (en) | 1982-12-03 |
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