JPH0249417Y2 - - Google Patents
Info
- Publication number
- JPH0249417Y2 JPH0249417Y2 JP188184U JP188184U JPH0249417Y2 JP H0249417 Y2 JPH0249417 Y2 JP H0249417Y2 JP 188184 U JP188184 U JP 188184U JP 188184 U JP188184 U JP 188184U JP H0249417 Y2 JPH0249417 Y2 JP H0249417Y2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- inorganic fiber
- heat
- spiral
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000012784 inorganic fiber Substances 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 239000010439 graphite Substances 0.000 claims description 19
- 229910002804 graphite Inorganic materials 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 14
- 238000004804 winding Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000010425 asbestos Substances 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Thermal Insulation (AREA)
- Gasket Seals (AREA)
Description
(イ) 考案の技術分野
この考案は、たとえば高温用管継手の密封部材
あるいは高温雰囲気下において、使用されるよう
なうず巻形のガスケツトに関し、さらに詳しくは
高耐熱性および高密封性に富む耐熱うず巻形ガス
ケツトに関する。
(ロ) 考案の背景
従来の耐熱性を備えたうず巻形のガスケツト
は、高温雰囲気により酸化消耗されやすい密封用
の膨張黒鉛テープを、うず巻形の中間部に介在さ
せ、内外周部に、耐熱用の無機繊維テープを位置
させ、これらを金属テープでうず巻形に保持して
形成している（たとえば実開昭52−143566号公
報）。
しかし、この種のうず巻形ガスケツトは、無機
繊維テープが高温にさらされると、このテープ自
体の結晶水が外部に放出されて減量してしまい、
たとえば石綿テープのような無機繊維テープの場
合は510℃程度で結晶水を放出する。このため、
うず巻形に巻かれたテープの全体が弛緩して膨張
黒鉛テープに対する保持力が弱まり、この膨張黒
鉛テープは高温雰囲気にさらされやすくなつて酸
化が急激に進行し、このうず巻形ガスケツトの密
封機能が著しく低下してしまう原因となつてい
た。
(ハ) 考案の目的
そこでこの考案は、高温雰囲気や酸化性雰囲気
下で使用しても、うず巻形に巻かれた各々のテー
プが弛緩することのない耐熱うず巻形ガスケツト
の提供を目的とする。
(ニ) 考案の構成
この考案は耐熱用の無機繊維テープと、密封用
の膨張黒鉛テープとを金属テープでうず巻形に保
持し、前記二種類のテープを保持する金属テープ
は、巻始め部と巻終り部及び、膨張黒鉛テープと
無機繊維テープ間でそれぞれ金属テープのみを巻
重ねて、この金属テープのみを巻重ねた箇所をス
ポツト溶接し、膨張黒鉛テープと無機繊維テープ
が独立して固定された状態でうず巻形に形成した
耐熱うず巻形ガスケツトであることを特徴とす
る。
(ホ) 考案の効果
この考案によれば、うず巻形に形成した金属テ
ープの巻始め部と巻終り部のみならず、中間巻部
の膨張黒鉛テープと無機繊維テープ間でも、金属
テープのみを巻重ねて、この巻重ね部分で金属テ
ープをスポツト溶接して固着したので、内周側よ
り外周側に向けて順次一定間隔ごとに独立して固
定されることになる。
したがつて、この金属テープは高温雰囲気や排
気ガス、水蒸気等の酸化性雰囲気の外部影響を受
けてもその周方向に対しては一切変化せず、各々
テープごとに保持して完全に弛緩を解消する。
このため、仮に無機繊維テープが高温雰囲気に
さらされて結晶水を放出しても、このうず巻形の
全体は何ら弛緩せず、それ故に膨張黒鉛テープは
安定して保持され、高温雰囲気にさらされがたい
状態を保持して常に高密封機能を維持し、高温や
酸化性雰囲気下での使用最適のガスケツトとな
る。
(ヘ) 考案の実施例
この考案の一実施例を以下図面に基づいて詳述
する。
図面は高温用管継手密封部材として使用される
耐熱うず巻形ガスケツトを示し、第１図および第
２図に示すように、この耐熱うず巻形ガスケツト
１は、形状的にスプリング作用を持たせるように
くせづけした金属テープすなわち、断面略くの字
形状に形成された金属テープ２と、この金属テー
プ２間に挟み込まれる石綿等からなる無機繊維テ
ープ３と、膨張黒鉛テープ４とから構成されてい
る。
そして、前記無機繊維テープ３は、耐熱用とし
て主としてうず巻形ガスケツト１の内外周側に、
また密封用の膨張黒鉛テープ４は中央部に設けら
れている。
前記無機繊維テープ３と膨張黒鉛テープ４を保
持する金属テープ２は、巻始め部５と巻終り部
６、及び中間巻部の膨張黒鉛テープ４と無機繊維
テープ３間７，８で、それぞれ金属テープ２のみ
を少なくとも２重に巻重ねし、この金属テープ２
の巻重ね部５，６，７，８を、適当間隔おきにス
ポツト溶接９をして、隣接する金属テープ２，２
同士を固定し、前記膨張黒鉛テープ４と無機繊維
テープ３とは独立して固定された状態で環状のう
ず巻形に形成されている。
製造に際しては、断面略くの字形状に形成され
た薄帯銅板からなる金属テープ２の、中央突出部
側を外向きにして、ガスケツトの内径に相当する
大きさに２〜３回すて巻きして環状に形成し、そ
の巻始め部５を、スポツト溶接９をする。
次に、この金属テープ２の内側に無機繊維テー
プ３を介装し、金属テープ２と共に、数回巻いて
耐熱に必要な一定厚さにする。
次に、金属テープ２のみを２重に巻いて同じく
この金属テープ２の巻重ね部７をスポツト溶接９
をして固定する。
次いで、その内側に密封用の膨張黒鉛テープ４
をこの金属テープ２と共に、数回巻いて密封に必
要な一定厚さに設けた後、この金属テープ２のみ
を２重に巻いて巻重ね部８をスポツト溶接９を施
して固定する。
さらにその内側に耐熱用の無機繊維テープ３を
同じく金属テープ２と共に、数回巻いた後、この
金属テープ２のみをすて巻きしてこのテープの巻
終り部６をスポツト溶接９をして環状に固定する
ことにより所定のうず巻形に形成する。
このように構成された耐熱うず巻形ガスケツト
は、中間部の巻重ね部７，８に対してもスポツト
溶接９が施されてあるため、内周側より外周側に
向けて順次一定間隔ごとに独立して固定された状
態にあり、ガスケツト全体の弛緩が確実に規制さ
れる。
そして、この耐熱うず巻形ガスケツト１を、第
３図に示すように、高温管１０，１０継手部間の
密封部材として使用した場合、金属テープ２にて
無機繊維テープ３，３および膨張黒鉛テープ４は
安定して保持されるが故に管１０，１０内を流通
する高温流体の熱影響は受け難く、常に高密封性
を発揮したガスケツトとして確実に長期使用し得
る。
次にこの考案例の耐熱うず巻形ガスケツトを従
来例の耐熱うず巻形ガスケツトと比較して説明す
る。
そして、その使用条件は以下に示すごとく、管
継手部のフランジ間におけるガスケツトの締付け
圧が270Kg／cm2の状態で装着し、その締付け状態
で615℃に加熱した炉中に120時間放置して、これ
らガスケツトの加熱前後の重量変化および窒素ガ
ス20Kg／cm2に対する漏洩量の結果を比較すると、
下表のごとき値に至つた。
(b) Technical field of the invention This invention relates to a spiral-wound gasket that is used as a sealing member for high-temperature pipe joints or in a high-temperature atmosphere. Concerning spiral gaskets. (b) Background of the invention Conventional heat-resistant spiral-wound gaskets have expanded graphite tape for sealing, which is easily oxidized and consumed in high-temperature atmospheres, interposed in the middle of the spiral, and on the inner and outer peripheries. A heat-resistant inorganic fiber tape is placed and held in a spiral shape with a metal tape (for example, Japanese Utility Model Application Publication No. 143566/1983). However, in this type of spiral-wound gasket, when the inorganic fiber tape is exposed to high temperatures, the crystallized water in the tape itself is released to the outside and loses weight.
For example, inorganic fiber tape such as asbestos tape releases crystal water at about 510°C. For this reason,
The entire tape wound in a spiral shape loosens and its holding force against the expanded graphite tape weakens, and this expanded graphite tape is easily exposed to high temperature atmospheres and oxidation progresses rapidly, causing the sealing of this spiral gasket to deteriorate. This caused a significant decline in functionality. (c) Purpose of the invention Therefore, the purpose of this invention is to provide a heat-resistant spiral-wound gasket in which each tape wound in a spiral shape does not loosen even when used in a high-temperature atmosphere or an oxidizing atmosphere. do. (d) Structure of the device In this device, an inorganic fiber tape for heat resistance and an expanded graphite tape for sealing are held in a spiral shape with a metal tape, and the metal tape holding the two types of tapes is attached at the beginning of the winding. Wrap only the metal tape at the end of the roll and between the expanded graphite tape and the inorganic fiber tape, and spot weld the overlapped parts of the metal tape to fix the expanded graphite tape and the inorganic fiber tape independently. The gasket is characterized by being a heat-resistant spiral-wound gasket that is formed into a spiral shape in a closed state. (e) Effects of the invention According to this invention, only the metal tape can be used not only at the beginning and end of the spirally wound metal tape, but also between the expanded graphite tape and the inorganic fiber tape in the intermediate winding area. The metal tapes are rolled up and fixed by spot welding at the rolled up parts, so that they are fixed independently at regular intervals from the inner circumferential side to the outer circumferential side. Therefore, this metal tape does not change at all in the circumferential direction even when exposed to external influences such as high temperature atmospheres or oxidizing atmospheres such as exhaust gas or water vapor, and each tape can be held individually to ensure complete relaxation. Eliminate. Therefore, even if the inorganic fiber tape were exposed to a high temperature atmosphere and released crystal water, the entire spiral shape would not relax at all, and therefore the expanded graphite tape would be stably held and exposed to a high temperature atmosphere. This gasket maintains a high sealing function and is ideal for use in high temperatures and oxidizing atmospheres. (F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings. The drawing shows a heat-resistant spiral-wound gasket used as a sealing member for high-temperature pipe joints. As shown in FIGS. The tape is made up of a metal tape 2 which is shaped like a dogleg in cross section, an inorganic fiber tape 3 made of asbestos or the like sandwiched between the metal tape 2, and an expanded graphite tape 4. There is. The inorganic fiber tape 3 is mainly applied to the inner and outer peripheral sides of the spirally wound gasket 1 for heat resistance.
Further, an expanded graphite tape 4 for sealing is provided at the center. The metal tape 2 holding the inorganic fiber tape 3 and the expanded graphite tape 4 has a metal tape 2 at the winding start part 5, at the winding end part 6, and at 7 and 8 between the expanded graphite tape 4 and the inorganic fiber tape 3 in the intermediate winding part. Wrap only tape 2 at least twice, and wrap this metal tape 2
The overlapped parts 5, 6, 7, 8 are spot welded 9 at appropriate intervals, and the adjacent metal tapes 2, 2 are
The expanded graphite tape 4 and the inorganic fiber tape 3 are fixed to each other and are formed into an annular spiral shape in a state of being fixed independently. During manufacturing, a metal tape 2 made of a thin copper plate having a dogleg-shaped cross section is wound two to three times with the central protrusion side facing outward to a size corresponding to the inner diameter of the gasket. The winding start portion 5 is spot welded 9. Next, an inorganic fiber tape 3 is interposed inside the metal tape 2 and wound together with the metal tape 2 several times to a constant thickness required for heat resistance. Next, only the metal tape 2 is wound twice, and the overlapping portion 7 of this metal tape 2 is also spot welded 9.
and fix it. Next, expandable graphite tape 4 for sealing is placed inside it.
After wrapping the metal tape 2 together with the metal tape 2 several times to provide a constant thickness necessary for sealing, only the metal tape 2 is wound twice and the overlapped portion 8 is fixed by spot welding 9. Furthermore, after wrapping a heat-resistant inorganic fiber tape 3 along with the metal tape 2 several times on the inside thereof, only the metal tape 2 is wound, and the end portion 6 of this tape is spot-welded 9 to form a ring. By fixing it to a predetermined spiral shape. In the heat-resistant spiral-wound gasket constructed in this way, spot welds 9 are also applied to the overlapped portions 7 and 8 in the intermediate portion, so that the gaskets are welded at regular intervals from the inner circumferential side to the outer circumferential side. It is in an independently fixed state and the relaxation of the entire gasket is reliably regulated. When this heat-resistant spiral-wound gasket 1 is used as a sealing member between the joints of high-temperature tubes 10 and 10, as shown in FIG. Since gasket 4 is held stably, it is not easily affected by the heat of the high temperature fluid flowing through the pipes 10, 10, and can be reliably used for a long period of time as a gasket that always exhibits high sealing performance. Next, the heat-resistant spiral-wound gasket of this invention will be explained in comparison with a conventional heat-resistant spiral-wound gasket. The usage conditions are as shown below: The gasket was installed with a tightening pressure of 270 kg/cm 2 between the flanges of the pipe joint, and left in that tightened state in a furnace heated to 615°C for 120 hours. , Comparing the results of the weight change of these gaskets before and after heating and the leakage amount for nitrogen gas 20Kg/ cm2 ,
We arrived at the values shown in the table below.
【表】
すなわち、上表よりこの考案例の試料の方が従
来例に比べて重量減が確実に抑制されると共に、
漏洩量を的確に低減できることが認められた。
このことは、各々の耐熱用のテープおよび密封
用のテープをそれぞれ安定して保持し、かつテー
プの機能を損なわない最適な耐熱密封特性を備え
た耐熱うず巻形ガスケツトであると判明した。
尚、本考案では、無機繊維テープとして、石綿
を開示したが、石綿の如く結晶水を有する通常の
無機繊維テープも適用できることは勿論である。
また、上述の一実施例においては膨張黒鉛テー
プをうず巻形の中間巻部に配設し、巻重ね部を２
箇所にしたが、これに限らず適宜その使用条件下
に適した低温側となる側に配設するのが適当であ
る。[Table] In other words, from the table above, the weight loss of the sample of this invention example is more reliably suppressed than that of the conventional example, and
It was confirmed that the amount of leakage could be reduced accurately. It has been found that the heat-resistant spiral-wound gasket stably holds each of the heat-resistant tapes and the sealing tape, and has optimal heat-resistant sealing properties without impairing the functions of the tapes. In the present invention, asbestos is disclosed as the inorganic fiber tape, but it goes without saying that ordinary inorganic fiber tapes having crystal water like asbestos can also be applied. In addition, in the above-mentioned embodiment, the expanded graphite tape is arranged in the intermediate winding part of the spiral shape, and the overlapping part is formed into two winding parts.
However, the location is not limited to this, and it is appropriate to arrange it on the side that is a low temperature side suitable for the usage conditions.
図面はこの考案の一実施例を示し、第１図は耐
熱うず巻形ガスケツトを示す斜視図、第２図は第
１図のＡ−Ａ拡大断面図、第３図はその使用状態
を示す縦断面図である。
１……耐熱うず巻形ガスケツト、２……金属テ
ープ、３……無機繊維テープ、４……膨張黒鉛テ
ープ、５……巻始め部、６……巻終り部、７，８
……中間巻重ね部、９……スポツト溶接。
The drawings show one embodiment of this invention; Fig. 1 is a perspective view showing a heat-resistant spiral-wound gasket, Fig. 2 is an enlarged cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a vertical cross-section showing the state in which it is used. It is a front view. 1... Heat-resistant spiral wound gasket, 2... Metal tape, 3... Inorganic fiber tape, 4... Expanded graphite tape, 5... Winding start, 6... Winding end, 7,8
...Intermediate winding overlap part, 9...Spot welding.
Claims (1)
テープとを金属テープでうず巻形に保持してなる
耐熱うず巻形ガスケツトであつて、 前記二種類のテープを保持する金属テープは、
巻始め部と巻終り部及び、膨張黒鉛テープと無機
繊維テープ間でそれぞれ金属テープのみを巻重
ね、 この金属テープのみを巻重ねた箇所をスポツト
溶接し、 膨張黒鉛テープと無機繊維テープが独立して固
定された状態でうず巻形に形成した耐熱うず巻形
ガスケツト。[Scope of Claim for Utility Model Registration] A heat-resistant spiral-wound gasket comprising a heat-resistant inorganic fiber tape and a sealing expanded graphite tape held in a spiral shape by a metal tape, the two types of tapes being The metal tape that holds
Only the metal tape is wrapped at the beginning and end of the roll, and between the expanded graphite tape and the inorganic fiber tape, and the parts where only the metal tape is wrapped are spot welded, so that the expanded graphite tape and the inorganic fiber tape become independent. A heat-resistant spiral-wound gasket that is formed into a spiral shape when held in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188184U JPS60114371U (en) | 1984-01-10 | 1984-01-10 | Heat resistant spiral wound gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188184U JPS60114371U (en) | 1984-01-10 | 1984-01-10 | Heat resistant spiral wound gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60114371U JPS60114371U (en) | 1985-08-02 |
| JPH0249417Y2 true JPH0249417Y2 (en) | 1990-12-26 |
Family
ID=30475028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP188184U Granted JPS60114371U (en) | 1984-01-10 | 1984-01-10 | Heat resistant spiral wound gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60114371U (en) |
-
1984
- 1984-01-10 JP JP188184U patent/JPS60114371U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60114371U (en) | 1985-08-02 |
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