JPH0446118Y2 - - Google Patents
Info
- Publication number
- JPH0446118Y2 JPH0446118Y2 JP1986100055U JP10005586U JPH0446118Y2 JP H0446118 Y2 JPH0446118 Y2 JP H0446118Y2 JP 1986100055 U JP1986100055 U JP 1986100055U JP 10005586 U JP10005586 U JP 10005586U JP H0446118 Y2 JPH0446118 Y2 JP H0446118Y2
- Authority
- JP
- Japan
- Prior art keywords
- core
- flexible graphite
- braided
- graphite sheet
- fibers
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 239000010439 graphite Substances 0.000 claims description 27
- 229910002804 graphite Inorganic materials 0.000 claims description 27
- 238000012856 packing Methods 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 239000011162 core material Substances 0.000 description 33
- 238000009940 knitting Methods 0.000 description 13
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 5
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000012207 thread-locking agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Laminated Bodies (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本発明は流体機器の軸封部、特に高圧条件下に
おいて使用され、高いシール性を要求されるバル
ブ用パツキンとして好適な編組パツキンに関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a shaft seal of a fluid device, particularly a braided packing suitable as a valve packing used under high pressure conditions and requiring high sealing performance.
（従来の技術）
バルブ用グランドパツキンのように、高圧条件
下において使用されるものは、シール性を高くす
る必要があるため、中心部に緻密化した中芯を使
用し、その表面を繊維の編組体で被覆した構造に
成形される。(Prior technology) Gland packings for valves used under high pressure conditions need to have high sealing performance, so a dense core is used in the center, and the surface is covered with fibers. It is molded into a structure covered with a braided body.
前記中芯としては、例えば黒鉛に樹脂、潤滑剤
などを混練したものに、強度アツプを図るための
補強繊維を添加したものが使用される。 The core used is, for example, a mixture of graphite mixed with a resin, a lubricant, etc., to which reinforcing fibers are added to increase the strength.
しかし、前述の中芯は、樹脂、潤滑剤等が高
温時において減量し緻密化を損なう補強効果の
大きいアスベスト繊維は脱アスベスト化の傾向に
より使用し得ないため、他の繊維の使用により補
強効果が低下する耐熱性を向上させるため、つ
まり高温時における樹脂、潤滑剤等の減量を抑制
して緻密化を維持するために、樹脂、潤滑剤を極
端に減らすと硬さが過剰になつて、取扱いが困難
になる等の問題点を有する。 However, asbestos fibers, which have a strong reinforcing effect as the resin, lubricant, etc. lose weight at high temperatures and impair densification, cannot be used for the above-mentioned core due to the tendency to remove asbestos. In order to improve heat resistance, in other words, to suppress the loss of resin, lubricant, etc. at high temperatures and maintain densification, if the resin and lubricant are drastically reduced, the hardness will become excessive. It has problems such as being difficult to handle.
従つて、このような問題があるために、編組パ
ツキンの中芯材として、黒鉛、繊維、樹脂の混合
物等に替えて、耐熱性にすぐれた可撓性黒鉛シー
トを使用することが提唱されている。 Therefore, due to these problems, it has been proposed to use a flexible graphite sheet with excellent heat resistance as the core material of the braided packing instead of a mixture of graphite, fiber, resin, etc. There is.
（考案が解決しようとする問題点）
しかし例えば、市販されている可撓性黒鉛シー
トを切断した後多数本束ねたものを中芯として使
用した場合、該シートに方向性があり、編組パツ
キンとなした後自由に曲げられないという取扱い
性に致命的な欠点を有する。(Problem to be solved by the invention) However, for example, if a commercially available flexible graphite sheet is cut and bundled in large numbers and used as a core, the sheet has directionality and the braided packing It has a fatal drawback in handling, as it cannot be bent freely after being made.
さらに、市販されている可撓性黒鉛シートは、
その密度が0.5〜1.0ｇ／cm3と比較的小さいので、
これを中芯として使用すると、加圧時に大きな体
積減少が生じてシール性を著しく低下させる。 Furthermore, commercially available flexible graphite sheets are
Since its density is relatively small at 0.5 to 1.0 g/ cm3 ,
If this is used as a core, a large volume reduction will occur during pressurization, resulting in a significant reduction in sealing performance.
本考案は、このような従来技術の背景に鑑みて
なされたもので、特に可撓性黒鉛シートは幅５mm
以下に切断すると圧縮率及び許容ひねり回数が飛
躍的に増大する特性を有している点に着目し、切
断幅５mm以下の可撓性黒鉛シートを中芯材として
使用するとともに、この可撓性黒鉛シートを繊維
材にて被覆し、該繊維材と前記可撓性黒鉛シート
との組合せにより、加圧時の体積減少を解消さ
せ、しかも使用性及び汎用性の向上を実現させる
編組パツキンを提供することを目的とする。 The present invention was made in view of the background of such conventional technology, and in particular, the flexible graphite sheet has a width of 5 mm.
Focusing on the fact that the compression ratio and allowable number of twists increase dramatically when cut into the following widths, we used a flexible graphite sheet with a cutting width of 5 mm or less as the core material, and To provide a braided packing in which a graphite sheet is covered with a fibrous material, and the combination of the fibrous material and the flexible graphite sheet eliminates volume reduction during pressurization, and also improves usability and versatility. The purpose is to
（問題点を解決するための手段）
本考案に係る編組パツキンは、棒状の中芯と、
この中芯の外周を被覆する編組体の被覆層からな
る編組パツキンにおいて、前記中芯が、５mm幅以
下に切断した可撓性黒鉛シートを複数枚重ね合
せ、その表面を繊維でニツト編み又は袋編み被覆
されているものである。(Means for solving the problem) The braided packing according to the present invention includes a rod-shaped core,
In a braided packing consisting of a coating layer of a braided body that covers the outer periphery of the core, the core is made by stacking a plurality of flexible graphite sheets cut to a width of 5 mm or less, and the surface of the core is knitted or bagged with fibers. It has a knitted covering.
（作用）
本考案においては、中芯材として、５mm幅以下
に切断した可撓性黒鉛シート、つまり圧縮率及び
許容ひねり回数が増大した可撓性黒鉛シートを使
用して、これを複数枚重ね合せるようにしている
から、引張り強さが大きくなり靱性が向上すると
ともに、柔軟性も具備することができる。また、
この重ね合せた可撓性黒鉛シートの表面を繊維で
ニツト編み又は袋編み被覆するようにしているか
ら、中芯の形状が、編組パツキンを構成する前に
保持でき、この形状保持によつて、予めロール加
工等で中芯の密度を高めておけば、加圧時に大き
な体積減少が生じず、シール性を著しく低下させ
るといつた問題が有効に解消される。(Function) In this invention, a flexible graphite sheet cut to a width of 5 mm or less, that is, a flexible graphite sheet with increased compression ratio and allowable number of twists, is used as the core material, and multiple sheets of this are stacked. Since they are made to match, the tensile strength is increased, toughness is improved, and flexibility can also be provided. Also,
Since the surface of the stacked flexible graphite sheets is coated with fibers in knit or bag knit, the shape of the core can be maintained before forming the braided packing, and by this shape retention, If the density of the core is increased in advance by rolling or the like, a large volume reduction will not occur during pressurization, and the problem of significantly lowering the sealing performance can be effectively resolved.
さらに、編組パツキンは、柔軟性を備えた中
芯、つまり前記可撓性黒鉛シートと前記繊維被覆
によつて、例えば軸径に合せて所定長さに切断し
て使用するといつた紐状体に構成しておくことが
可能となり、使用性及び汎用性の向上が実現され
る。 Furthermore, the braided packing has a flexible core, that is, the flexible graphite sheet and the fiber coating, so that it can be used as a string-like body that can be cut into a predetermined length according to the shaft diameter. This makes it possible to configure the system in advance, thereby improving usability and versatility.
（実施例）
第１図に示すように、厚さ0.38mmの可撓性黒鉛
シート１を３mm幅に切断して５枚重ね合せ、その
表面を0.1mmφのステンレス（SUS304）繊維２で
ニツト編み被覆した編み糸３（密度0.7ｇ／cm3）
を形成する（Ｗ＝4.8mm×ｔ＝3.2mm）。(Example) As shown in Fig. 1, five flexible graphite sheets 1 with a thickness of 0.38 mm are cut into 3 mm width pieces, stacked one on top of the other, and the surface is knitted with stainless steel (SUS304) fibers 2 with a diameter of 0.1 mm. Covered knitting yarn 3 (density 0.7g/cm 3 )
(W=4.8mm×t=3.2mm).
実施例 １
前記編み糸３を５本束ねて、20回／ｍのひねり
加工を施しながらロール加工を行い、第２図に示
す棒状の中芯４（Ｗ＝5.6mm×Ｈ＝5.6mm、密度1.7
ｇ／cm3）を形成し、この棒状の中芯４の外周を第
３図のように金属繊維にて16打袋編みした編組体
の被覆層５によつて被覆し、さらに表面にシリコ
ン油、鱗片状黒鉛、ゴム糸接着剤等より成る目詰
材６を含浸させた。Example 1 Five knitting yarns 3 were bundled and rolled while being twisted at a rate of 20 times/m to form a rod-shaped core 4 (W = 5.6 mm x H = 5.6 mm, density 1.7
g/cm 3 ), and the outer periphery of this rod-shaped core 4 is covered with a covering layer 5 of a braided body made of 16 bags of metal fibers as shown in FIG. 3, and the surface is further coated with silicone oil. , scaly graphite, rubber thread adhesive, etc. were impregnated with a plugging material 6 .
実施例 ２
前記編み糸３を８本用いて８打角編みしながら
ロール加圧を行い、第４図に示す棒状の中芯４
（Ｗ＝8.1mm×Ｈ＝8.1mm、密度1.5ｇ／cm3）を形成
し、この棒状の中芯４の外周を第５図のように金
属繊維にて16打袋編みした編組体の被覆層５によ
つて被覆し、さらに表面にシリコン油、鱗片状黒
鉛、ゴム糸接着剤等より成る目詰材６を含浸させ
た。Example 2 Using 8 of the knitting yarns 3, roll pressure was applied while knitting 8 strokes to form a rod-shaped core 4 as shown in FIG.
(W = 8.1 mm x H = 8.1 mm, density 1.5 g/cm 3 ), and the outer periphery of this rod-shaped core 4 is covered with a braided body made of 16 bags of metal fibers as shown in Figure 5. It was covered with a layer 5, and the surface was further impregnated with a plugging material 6 made of silicone oil, flaky graphite, rubber thread adhesive, etc.
第６図に0.38mm厚さを有する可撓性黒鉛シート
の切断幅と圧縮率との関係の実験結果を、また第
７図に0.38mm厚さを有する可撓性黒鉛シートの切
断幅と許容ひねり回数との関係の実験結果をそれ
ぞれ示している。 Figure 6 shows the experimental results of the relationship between the cutting width and compressibility of a flexible graphite sheet with a thickness of 0.38 mm, and Figure 7 shows the cutting width and allowable ratio of a flexible graphite sheet with a thickness of 0.38 mm. Experimental results regarding the relationship with the number of twists are shown.
これらの図において、可撓性黒鉛シートの切断
幅が５mm以下になると、圧縮率及び許容ひねり回
数が飛躍的に増大する特性を有していることが判
る。 In these figures, it can be seen that when the cutting width of the flexible graphite sheet becomes 5 mm or less, the compression ratio and the allowable number of twists increase dramatically.
したがつて、切断幅３mmの可撓性黒鉛シート１
を複数枚重ね合せた編み糸３による、前記第１及
び第２実施例で述べた棒状の中芯４の形成が容易
かつ確実になされる。即ち、８打角編み及びひね
り加工を施しても、中芯材である可撓性黒鉛シー
ト１の切損、つまり編み糸３の糸切れが起らな
い。 Therefore, a flexible graphite sheet 1 with a cutting width of 3 mm
The rod-shaped core 4 described in the first and second embodiments can be easily and reliably formed using the knitting yarn 3 made by overlapping a plurality of layers. That is, even when 8-stroke knitting and twisting are performed, the flexible graphite sheet 1 serving as the core material does not break, or the knitting yarn 3 does not break.
さらに、棒状の中芯４の外周を金属繊維にて16
打袋編した編組体の被覆層５によつて被覆してい
るから、編組パツキンとして優れた特性を示す。
しかも、この編組パツキンは、例えば軸径に合せ
て所定長さに切断して使用することができるか
ら、汎用性と使用性が向上する。 Furthermore, the outer periphery of the rod-shaped center core 4 is made of metal fiber 16
Since it is covered with the covering layer 5 of the bag-knitted braided body, it exhibits excellent characteristics as a braided packing.
Furthermore, this braided packing can be used by cutting it into a predetermined length according to the shaft diameter, for example, so that versatility and usability are improved.
また、樹脂、潤滑剤等のような高温における減
量が著しい材料の使用を省くことができるので、
緻密度が損なわれない。 In addition, it is possible to omit the use of materials such as resins and lubricants that lose significant weight at high temperatures.
Density is not impaired.
なお、前記実施例では、中芯として構成させる
編み糸３を複数本ひねり加工又は編組する場合に
ついて説明しているが、勿論、中芯は１本の編み
糸３で構成してもよく、又、１本の編み糸３をひ
ねり加工したものを用いてもよい。 In addition, in the above embodiment, the case where a plurality of knitting yarns 3 to be constituted as the core are twisted or braided is explained, but of course, the core may be constituted by one knitting yarn 3, or , one obtained by twisting one knitting yarn 3 may be used.
（考案の効果）
以上説明したように、本考案によれば、中芯材
として使用する可撓性黒鉛シートを、５mm幅以下
に切断して圧縮率及び許容ひねり回数を増大させ
ている上、複数枚重ね合せるようにしているか
ら、引張強さが大きくなり靱性が向上するととも
に、柔軟性も具備することができる。したがつ
て、柔軟性を損なわないようにその表面をニツト
編み又は袋編みで繊維被覆することによつて形成
した中芯により、編組パツキンを軸径に合わせて
所定長さに切断して使用する紐状体を構成してお
くことができ、使用性及び汎用性を大幅に向上で
きる。(Effects of the invention) As explained above, according to the invention, the flexible graphite sheet used as the core material is cut into a width of 5 mm or less to increase the compression ratio and the allowable number of twists. Since a plurality of sheets are stacked one on top of the other, tensile strength is increased, toughness is improved, and flexibility can also be provided. Therefore, the braided packing is cut into a predetermined length according to the shaft diameter using a core formed by covering the surface with fibers by knitting or bag knitting so as not to impair flexibility. A string-like body can be formed, and usability and versatility can be greatly improved.
しかも、この中芯はそれ自体形状が保持できる
ものであるから、該中芯を予めロール加工等して
おくことで、密度を高めておくことができ、編組
パツキン装着時に、中芯が大きく体積減少してシ
ール性が著しく低下するといつた問題も有効に防
止できるものである。 Moreover, since this core can maintain its shape, by rolling the core in advance, it is possible to increase the density, and when the braided packing is attached, the core has a large volume. It is also possible to effectively prevent problems such as a significant decrease in sealing performance due to decrease in sealing performance.
第１図は本考案に係る編み糸の一実施例を示す
一部切断斜視図、第２図はひねり加工した中芯の
一実施例を示す一部切断斜視図、第３図は第２図
の中芯を用いた本考案編組パツキンの一実施例を
示す一部切断斜視図、第４図は８打角編した中芯
の一実施例を示す一部切断斜視図、第５図は第４
図の中芯を用いた本考案編組パツキンの一実施例
を示す斜視図、第６図は可撓性黒鉛シートの切断
幅と圧縮率との関係を示すグラフ、第７図は可撓
性黒鉛シートの切断幅と許容ひねり回数との関係
を示すグラフである。
１……可撓性黒鉛シート、２……繊維、４……
棒状の中芯、５……被覆層。
FIG. 1 is a partially cutaway perspective view showing an embodiment of the knitting yarn according to the present invention, FIG. 2 is a partially cutaway perspective view showing an embodiment of the twisted core, and FIG. FIG. 4 is a partially cutaway perspective view showing an embodiment of the braided packing of the present invention using a core, FIG. 4
Figure 6 is a perspective view showing an embodiment of the braided packing of the present invention using a center core, Figure 6 is a graph showing the relationship between cutting width and compression ratio of flexible graphite sheet, Figure 7 is flexible graphite sheet. It is a graph showing the relationship between the cutting width of the sheet and the allowable number of twists. 1...Flexible graphite sheet, 2...Fiber, 4...
Rod-shaped core, 5...covering layer.
Claims (1)
体の被覆層からなる編組パツキンにおいて、前記
中芯が、５mm幅以下に切断した可撓性黒鉛シート
を複数枚重ね合せ、その表面を繊維でニツト編み
又は袋編み被覆したものであることを特徴とする
編組パツキン。 In the braided packing, which consists of a rod-shaped core and a coating layer of a braided body that covers the outer periphery of the core, the core is made by laminating a plurality of flexible graphite sheets cut to a width of 5 mm or less, and covering the surface of the core. A braided underwear characterized by being covered with fibers in a knitted or bag-knitted manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986100055U JPH0446118Y2 (en) | 1986-06-30 | 1986-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986100055U JPH0446118Y2 (en) | 1986-06-30 | 1986-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS636272U JPS636272U (en) | 1988-01-16 |
| JPH0446118Y2 true JPH0446118Y2 (en) | 1992-10-29 |
Family
ID=30969510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986100055U Expired JPH0446118Y2 (en) | 1986-06-30 | 1986-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446118Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2519221Y2 (en) * | 1989-09-18 | 1996-12-04 | 株式会社光合金製作所 | Drainage / non-drainage automatic switching device |
| JP2521142Y2 (en) * | 1989-09-18 | 1996-12-25 | 株式会社 光合金製作所 | Drainage / non-drainage automatic switching device |
| JPH0627546B2 (en) * | 1990-05-16 | 1994-04-13 | 日本ピラー工業株式会社 | Knitting yarn for gland packing and gland packing |
| JPH078928Y2 (en) * | 1990-08-28 | 1995-03-06 | ニチアス株式会社 | Puckkin |
| JP7061496B2 (en) * | 2018-03-30 | 2022-04-28 | 日本ピラー工業株式会社 | Yarn and gland packing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514808A (en) * | 1978-07-14 | 1980-02-01 | Ibiden Co Ltd | Desulfurizer for molten iron and its manufacture |
| JPS5729854A (en) * | 1980-07-28 | 1982-02-17 | Hitachi Chem Co Ltd | Composite piled packing using expansion graphite formation |
| JPS57161365A (en) * | 1981-03-27 | 1982-10-04 | Nippon Pillar Packing Co Ltd | Packing |
| JPS60260332A (en) * | 1984-06-08 | 1985-12-23 | ニチアス株式会社 | Braided packing containing core and manufacture thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56160360U (en) * | 1980-04-30 | 1981-11-30 |
-
1986
- 1986-06-30 JP JP1986100055U patent/JPH0446118Y2/ja not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514808A (en) * | 1978-07-14 | 1980-02-01 | Ibiden Co Ltd | Desulfurizer for molten iron and its manufacture |
| JPS5729854A (en) * | 1980-07-28 | 1982-02-17 | Hitachi Chem Co Ltd | Composite piled packing using expansion graphite formation |
| JPS57161365A (en) * | 1981-03-27 | 1982-10-04 | Nippon Pillar Packing Co Ltd | Packing |
| JPS60260332A (en) * | 1984-06-08 | 1985-12-23 | ニチアス株式会社 | Braided packing containing core and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636272U (en) | 1988-01-16 |
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