JPH0432553Y2 - - Google Patents
Info
- Publication number
- JPH0432553Y2 JPH0432553Y2 JP1987041728U JP4172887U JPH0432553Y2 JP H0432553 Y2 JPH0432553 Y2 JP H0432553Y2 JP 1987041728 U JP1987041728 U JP 1987041728U JP 4172887 U JP4172887 U JP 4172887U JP H0432553 Y2 JPH0432553 Y2 JP H0432553Y2
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- gasket
- spiral
- outer ring
- inner diameter
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000011162 core material Substances 0.000 description 18
- 239000012530 fluid Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Gasket Seals (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はガスケツトに係り、特にうず巻状芯体
をコ字形断面のフツ素樹脂製の外被で被覆したガ
スケツトに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gasket, and more particularly to a gasket in which a spirally wound core is covered with a fluororesin jacket having a U-shaped cross section.
接続される2つのパイプのフランジ間には、流
体漏洩を防止するために、種々のガスケツトが介
在されており、これらのガスケツトとしてフツ素
樹脂被覆ガスケツトやうず巻形ガスケツトなどが
広く使用されている。このフツ素樹脂被覆ガスケ
ツトのうち石綿ジヨイントシート等の芯材をコ字
形断面のフツ素樹脂成形外被で被覆したものは、
比較的高温度でのクリープ現象を防止できると共
にガスケツトの内径側をパイプ内径と同径にする
ことにより内部流体の乱流を防止でき、さらにフ
ランジ間での流体滞留をも防止することができ
る。
Various gaskets are interposed between the flanges of two connected pipes to prevent fluid leakage, and fluororesin-coated gaskets and spiral-wound gaskets are widely used as these gaskets. . Among these fluororesin-coated gaskets, those in which a core material such as an asbestos joint sheet is covered with a fluororesin molded outer jacket with a U-shaped cross section are:
Creep phenomenon at relatively high temperatures can be prevented, and by making the inner diameter side of the gasket the same diameter as the inner diameter of the pipe, turbulent flow of the internal fluid can be prevented, and fluid retention between the flanges can also be prevented.
他方、うず巻形ガスケツトは、金属帯と緩衝材
とを重ね合せ、うず巻状に巻込み、巻始めと巻終
りの金属帯をスポツト溶接で固定したもので、耐
圧性、耐熱性が高く、かつ漏れ止め効果に優れて
いる。 On the other hand, a spiral gasket is made by overlapping a metal strip and a cushioning material, winding them in a spiral shape, and fixing the metal strips at the beginning and end of the winding with spot welding, and has high pressure resistance and heat resistance. It also has an excellent leak-proofing effect.
しかしながら、上記フツ素樹脂被覆ガスケツト
は、締付力を強くするとフツ素樹脂成形外被から
芯材がはみ出てしまうため高温高圧流体のシール
には使用できないという問題があり、さらに、内
部流体が高圧ガスである場合には、このガスが、
外被を浸透し芯体を劣化させるという問題もあつ
た。
However, the above-mentioned fluororesin-coated gasket has the problem that if the tightening force is increased, the core material protrudes from the fluororesin molded outer jacket, so it cannot be used for sealing high-temperature, high-pressure fluids. If it is a gas, this gas is
There was also the problem that it penetrated the outer covering and deteriorated the core.
またうず巻形ガスケツトは、低締付面圧力で高
圧ガス流体をシールすることが困難である。さら
にフランジとガスケツトとの合いの段差部分に流
体が滞留するのを阻止することが困難であり、こ
のため流体が樹脂モノマーなどの場合には滞留に
伴う重合作用によつて結晶化しそれが成長して流
路を狭めるといつた問題があつた。 Spiral-wound gaskets also have difficulty sealing high pressure gas fluids with low clamping surface pressures. Furthermore, it is difficult to prevent the fluid from stagnation at the stepped portion where the flange and gasket meet, and for this reason, if the fluid is a resin monomer, it may crystallize and grow due to the polymerization action that accompanies the stagnation. There was a problem when the flow path was narrowed.
このように、フツ素樹脂被覆ガスケツト及びう
ず巻形ガスケツトはそれぞれ優れた特長を有する
反面、上述した欠点を有するため、それぞれ使用
範囲が制限されていた。 As described above, while the fluororesin-coated gasket and the spiral-wound gasket each have excellent features, they each have the above-mentioned drawbacks, which limit their range of use.
そこで本考案の目的は、フツ素樹脂ガスケツト
とうず巻形ガスケツトの長所を生かしながらそれ
ぞれの欠点を解決したフツ素樹脂被覆ガスケツト
を提供することにある。 Therefore, an object of the present invention is to provide a fluororesin-coated gasket that takes advantage of the advantages of a fluororesin gasket and a spiral-wound gasket while solving the drawbacks of each.
この目的を達成するために、本考案は、金属帯
と緩衝材とを重ね合せてうず巻状に巻いて形成し
てなるうず巻状芯体と、このうず巻状芯体の両端
面を被覆するフツ素樹脂製の外被リングとを具備
し、このフツ素樹脂製の外被リングは横断面の外
方側が開口しかつ内径が配管内径とほぼ等しいコ
字状のリングであることを特徴とするものであ
る。
In order to achieve this objective, the present invention has a spiral core formed by overlapping a metal band and a cushioning material and winding them in a spiral, and coating both end surfaces of the spiral core. The fluorine resin outer ring is characterized by being open on the outer side of the cross section and having a U-shaped inner diameter that is approximately equal to the inner diameter of the pipe. That is.
本考案によれば、ガスケツトの締付時に金属帯
が外被リング内面にくい込み外被リングに機械的
に結合する。このため締付力が大きくなつても芯
材が外被から離脱することはない。また外被リン
グがフツ素樹脂から成るため低締付面圧でガス流
体のシールを行うことができる。また外被リング
の内径をフランジ内径に一致させることにより、
内部流体の乱流及びフランジ間での滞留が防止さ
れる。
According to the present invention, when the gasket is tightened, the metal band is inserted into the inner surface of the outer ring and is mechanically connected to the outer ring. Therefore, even if the tightening force increases, the core material will not separate from the outer cover. Furthermore, since the outer ring is made of fluororesin, gas fluid can be sealed with low tightening surface pressure. In addition, by matching the inner diameter of the outer ring to the inner diameter of the flange,
Internal fluid turbulence and stagnation between the flanges is prevented.
以下本考案によるフツ素樹脂被服ガスケツトの
一実施例を第1図および第2図を参照して説明す
る。
An embodiment of the fluororesin-covered gasket according to the present invention will be described below with reference to FIGS. 1 and 2.
第1図において、一対のフランジ1,2の間に
フツ素樹脂製のガスケツト3が介在され、このガ
スケツト3は芯材4とこの芯材4ノ一部を外側か
ら被覆する横断面がコ字形のフツ素樹脂製の外被
リング5とから構成されている。芯材4は、断面
がM字やV字等にくせ付けされた薄い金属帯と軟
質な帯状緩衝材とを重ね合せてうず巻状にかたく
巻込み、巻始めと巻終りの金属帯をスポツト溶接
で固定した構造である。この金属帯の材料として
はステンレス鋼やチタン、モネル等が使用され
る。また緩衝材の材料としては、石綿紙やPTFE
(四フツ化エチレン樹脂)、グラフオイル等が使用
される。 In FIG. 1, a gasket 3 made of fluororesin is interposed between a pair of flanges 1 and 2, and this gasket 3 has a U-shaped cross section that covers a core material 4 and a portion of the core material 4 from the outside. It is composed of an outer cover ring 5 made of fluororesin. The core material 4 is made by overlapping a thin metal band with an M-shaped or V-shaped cross section and a soft band-shaped cushioning material, tightly rolling it into a spiral shape, and spotting the metal bands at the beginning and end of the winding. The structure is fixed by welding. Stainless steel, titanium, monel, etc. are used as the material for this metal band. In addition, asbestos paper and PTFE can be used as cushioning materials.
(tetrafluoroethylene resin), graph oil, etc. are used.
フツ素樹脂製の外被リング5は、内径Dがフラ
ンジ1,2の内径(パイプ内径)とほぼ同径のリ
ングであつて、その横断面は外方に開口したコ字
形である。このフツ素樹脂製の外被リング5の材
料としては、PTFEが好適である。 The outer ring 5 made of fluororesin is a ring whose inner diameter D is approximately the same as the inner diameter (inner diameter of the pipe) of the flanges 1 and 2, and its cross section is U-shaped with an outward opening. PTFE is suitable as the material for the outer ring 5 made of fluororesin.
この実施例では、芯材4に外嵌するように外輪
4が付設されている。この外輪6はフランジ装着
時にセンタリングを可能とすると共に、より高圧
の流体シールを可能にする。なお、外輪6の材料
としては軟鋼板や、ステンレス鋼、チタン等が使
用される。 In this embodiment, an outer ring 4 is attached so as to fit around the core material 4. This outer ring 6 enables centering when the flange is attached, and also enables higher pressure fluid sealing. Note that the outer ring 6 is made of a mild steel plate, stainless steel, titanium, or the like.
このように構成されたフツ素樹脂被覆ガスケツ
ト3は、第1図においてフランジ1,2の圧着に
より締付けられると、芯材4の金属帯が外被リン
グ5のフランジ5a,5bの内面にくい込み外被
リング5と機械的に結合する。このため締付力を
大きくしても芯材4が外被リング5から離脱する
ことが防止される。また、外被リング5の内径が
フランジ1,2の内径にほぼ等しく定められてい
るので、パイプ内を流れる内部流体の乱流を防止
できると共に、フランジ1,2の間に流体が滞留
することを防止できる。 When the fluororesin-coated gasket 3 constructed in this manner is tightened by crimping the flanges 1 and 2 in FIG. It is mechanically coupled to the ring 5. Therefore, even if the tightening force is increased, the core material 4 is prevented from separating from the outer sheath ring 5. Furthermore, since the inner diameter of the outer sheath ring 5 is set approximately equal to the inner diameter of the flanges 1 and 2, it is possible to prevent turbulence of the internal fluid flowing inside the pipe and to prevent the fluid from stagnation between the flanges 1 and 2. can be prevented.
第2図はシール可能内圧と初期ガスケツト締付
面圧(内圧を含む)との関係を求めた実験データ
を示したグラフであり、緩衝材として石綿紙、黒
鉛テープ、PTFEをそれぞれ使用した従来のうず
巻形ガスケツトの比較例A,B,Cに比べて、本
考案に係る第1図の実施例のフツ素樹脂被覆ガス
ケツトは曲線Dに示すように初期ガスケツト締付
面圧が低下している。なお、この実験は常温で行
われ内部流体は窒素ガスであつた。 Figure 2 is a graph showing experimental data for determining the relationship between sealable internal pressure and initial gasket tightening surface pressure (including internal pressure). Compared to Comparative Examples A, B, and C of spiral-wound gaskets, the fluororesin-coated gasket of the embodiment of the present invention shown in FIG. 1 has a lower initial gasket tightening surface pressure, as shown by curve D. . Note that this experiment was conducted at room temperature, and the internal fluid was nitrogen gas.
上記実施例からも例証されるように、外被5が
フツ素樹脂で成形されているので、従来のうず巻
形ガスケツトに比べて低締付面圧でガス流体のシ
ールが可能となる。また、シール効果も芯材4の
金属帯が外被リング5のフランジ5a,5bの内
面に食い込み従来のフツ素樹脂被覆ガスケツトに
比較して同等以上である。 As exemplified by the above embodiments, since the outer cover 5 is molded from fluororesin, gas fluid can be sealed with a lower tightening surface pressure than with conventional spiral-wound gaskets. Furthermore, the sealing effect is equivalent to or better than that of a conventional fluororesin-coated gasket because the metal band of the core material 4 bites into the inner surfaces of the flanges 5a and 5b of the outer ring 5.
なお、第1図に点線で示したように芯材4の内
側面と外被5との間にステンレス鋼等のリング7
を介在させれば、外輪6と協働して、ガスケツト
芯材4の巻きほぐれを防止することができる。 In addition, as shown by the dotted line in FIG.
By interposing the outer ring 6, it is possible to prevent the gasket core material 4 from unwinding in cooperation with the outer ring 6.
〔考案の効果〕
以上の説明から明らかなように、本考案による
フツ素樹脂被覆ガスケツトは、金属帯と緩衝材と
を重ね合せてうず巻状に巻いて形成したうず巻状
芯体と、このうず巻状芯体を外側から被覆するフ
ツ素樹脂製の外被リングとを具備し、このフツ素
樹脂製の外被は断面が外周側に開口したコ字形状
であるので、低圧締付面圧でもガスケツトの締付
時に金属帯が外被リングのフランジの内面に容易
に食い込み、芯材の離脱を防止でき、高温高圧流
体のシールにも適用することができる。また外被
がフツ素樹脂から成るので、従来のうず巻形ガス
ケツトに比べて低締付面圧でガス流体のシールが
可能となる。さらに外被の内径をフランジ内径に
一致させているので内部流体の乱流を防止できる
と共に、フランジ間での滞留も防止することがで
きる。[Effects of the invention] As is clear from the above explanation, the fluororesin-coated gasket according to the invention consists of a spiral core formed by overlapping a metal strip and a cushioning material and winding them in a spiral, and It is equipped with a fluororesin outer sheath ring that covers the spiral core from the outside, and this fluororesin outer sheath has a U-shaped cross section with an opening on the outer periphery, so it can be used as a low-pressure tightening surface. Even under pressure, the metal band easily bites into the inner surface of the flange of the outer sheath ring when the gasket is tightened, preventing the core material from coming off, and can also be applied to sealing high-temperature, high-pressure fluids. Furthermore, since the outer cover is made of fluororesin, it is possible to seal the gas fluid with lower tightening surface pressure than with conventional spiral-wound gaskets. Furthermore, since the inner diameter of the outer cover is made to match the inner diameter of the flange, it is possible to prevent turbulence of the internal fluid and also to prevent stagnation between the flanges.
第1図は本考案によるフツ素樹脂被覆ガスケツ
トの一実施例を示した断面図、第2図はガスケツ
トのシール可能内圧と初期ガスケツト締付面圧と
の関係を示したグラフである。
1,2……フランジ、3……フツ素樹脂成形外
被、4……芯材、5……外被リング。
FIG. 1 is a cross-sectional view showing one embodiment of a fluororesin-coated gasket according to the present invention, and FIG. 2 is a graph showing the relationship between the sealable internal pressure of the gasket and the initial gasket tightening surface pressure. 1, 2...Flange, 3...Fluorine resin molded outer cover, 4...Core material, 5...Outer ring.
Claims (1)
いて形成してなるうず巻状芯体と、このうず巻
状芯体の両端面を被覆するフツ素樹脂製の外被
リングとを具備し、このフツ素樹脂製の外被リ
ングは横断面の外方側が開口しかつ内径が配管
内径とほぼ等しいコ字状のリングであることを
特徴とするガスケツト。 2 上記うず巻き状の芯体の外側には外輪が配置
され上記芯体の内周面と上記外被リンクとの間
に保持リングが介挿されていることを特徴とす
る実用新案登録請求の範囲第1項に記載のガス
ケツト。[Claims for Utility Model Registration] 1. A spiral core formed by overlapping a metal band and a cushioning material and winding them in a spiral, and a fluorine material covering both end surfaces of the spiral core. and a resin outer ring, the outer ring made of fluororesin being open on the outer side in cross section and having a U-shaped inner diameter approximately equal to the inner diameter of the pipe. . 2 Claims for registration of a utility model characterized in that an outer ring is arranged on the outside of the spiral core, and a retaining ring is inserted between the inner peripheral surface of the core and the outer link. Gasket according to paragraph 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987041728U JPH0432553Y2 (en) | 1987-03-20 | 1987-03-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987041728U JPH0432553Y2 (en) | 1987-03-20 | 1987-03-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63150187U JPS63150187U (en) | 1988-10-03 |
JPH0432553Y2 true JPH0432553Y2 (en) | 1992-08-05 |
Family
ID=30856988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987041728U Expired JPH0432553Y2 (en) | 1987-03-20 | 1987-03-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0432553Y2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2536682Y2 (en) * | 1991-10-24 | 1997-05-21 | 日本ピラー工業株式会社 | Metal-coated gasket |
JP4674055B2 (en) * | 2004-04-27 | 2011-04-20 | 日本バルカー工業株式会社 | gasket |
JP6200259B2 (en) * | 2013-09-30 | 2017-09-20 | 日本バルカー工業株式会社 | Plastic gasket for sealing |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6058961B2 (en) * | 1981-06-11 | 1985-12-23 | アイ・ジ−・アイ アンド アイ・ジ−・アイ エス・ピ−・エ− | Children's shoes and their manufacturing method |
Family Cites Families (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 |
JPS60154664U (en) * | 1984-03-26 | 1985-10-15 | 石野ガスケツト工業株式会社 | graphite sheet gasket |
-
1987
- 1987-03-20 JP JP1987041728U patent/JPH0432553Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6058961B2 (en) * | 1981-06-11 | 1985-12-23 | アイ・ジ−・アイ アンド アイ・ジ−・アイ エス・ピ−・エ− | Children's shoes and their manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
JPS63150187U (en) | 1988-10-03 |
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