JPH0456190B2 - - Google Patents
Info
- Publication number
- JPH0456190B2 JPH0456190B2 JP12619885A JP12619885A JPH0456190B2 JP H0456190 B2 JPH0456190 B2 JP H0456190B2 JP 12619885 A JP12619885 A JP 12619885A JP 12619885 A JP12619885 A JP 12619885A JP H0456190 B2 JPH0456190 B2 JP H0456190B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- ceramic
- metal
- cage
- spacer
- 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
- 239000000919 ceramic Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 13
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 239000012530 fluid Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Multiple-Way Valves (AREA)
- Lift Valve (AREA)
- Sliding Valves (AREA)
Description
【発明の詳細な説明】
［発明の目的］
産業上の利用分野
本発明は、金属製の弁箱にセラミツク製の弁部
材を取付けたバルブの構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Application Field The present invention relates to a valve structure in which a ceramic valve member is attached to a metal valve body.
従来の技術
一般に、高差圧流体を処理するバルブの内弁部
材はエロージヨンが生じ易く、これを防止するた
め耐蝕性に優れたセラミツクが利用されるように
なつて来た。2. Description of the Related Art In general, inner valve members of valves that handle high differential pressure fluids are prone to erosion, and to prevent this erosion, ceramics with excellent corrosion resistance have come to be used.
従来、高圧弁の内弁部材としてセラミツクを利
用する場合、該内弁部材の金属表面へ溶射によつ
てセラミツクをコーテイングしていた。 Conventionally, when ceramic is used as an inner valve member of a high-pressure valve, the metal surface of the inner valve member is coated with ceramic by thermal spraying.
発明が解決しようとする問題点
しかしながら、上記従来の溶射は、軸状の弁部
材の外側表面には容易に実施出来るが、穴や内面
を有する弁部材の内側表面に施こすのは困難であ
り、特に中・小物部品に対しては実用化されてい
ないのが実情であつた。Problems to be Solved by the Invention However, although the above conventional thermal spraying can be easily applied to the outer surface of a shaft-shaped valve member, it is difficult to apply it to the inner surface of a valve member that has a hole or an inner surface. However, the reality is that it has not been put to practical use, especially for small and medium-sized parts.
従つて、上記コーテイングに代えて、ソリツド
セラミツクス部材を使用することが考えられる
が、該セラミツクの熱膨張率はこれを取付ける周
囲の金属製部品の熱膨張率に比べて1/2〜1/3と小
さく、常温以外の流体を通すバルブにこのソリツ
ドセラミツク部材を利用しようとすると、その膨
張率の差によつてセラミツク部材と周囲の金属部
材との間に弛緩が生じ、シール部の洩れを惹起す
る虞れがあつた。 Therefore, it is conceivable to use a solid ceramic member instead of the above coating, but the coefficient of thermal expansion of the ceramic is 1/2 to 1/2 that of the surrounding metal parts to which it is attached. If this solid ceramic member is used in a valve that is as small as 3 and allows fluids to flow at temperatures other than room temperature, the difference in expansion rates will cause loosening between the ceramic member and the surrounding metal member, resulting in leakage of the seal. There was a risk that this would cause
本発明は、上記従来の問題点を解決するために
なされたもので、その目的とするところは、流体
の温度変化が生じても弛緩することなく、常に安
定してセラミツク部材を取付けておくことが出来
る新規なバルブを提供するにある。 The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to always stably attach a ceramic member without loosening even when the temperature of the fluid changes. Our goal is to provide a new valve that can.
［発明の構成］
本発明のセラミツク製弁部材を有するバルブ
は、金属製の弁箱と、該弁箱内に装着したセラミ
ツク製のシートリング、ケージ、ガイドブツシユ
等の弁部材と、これら弁箱とセラミツク製弁部材
との間に介装され、上記弁箱の金属より大きい熱
膨張係数を有する金属から成るスペーサ又はブツ
シユ等の第三部材と、から構成されていることを
特徴とするものである。[Structure of the Invention] A valve having a ceramic valve member of the present invention includes a metal valve box, a ceramic valve member such as a seat ring, a cage, and a guide bushing mounted in the valve box, and these valve boxes and A third member such as a spacer or a bushing is interposed between the valve member made of ceramic and is made of a metal having a coefficient of thermal expansion larger than that of the metal of the valve box. .
実施例
以下、本発明の実施例について図面を参照しな
がら説明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図において、１は鋼製の弁箱であつて、流
体の流入口１ａ及び流出口１ｂ有する。 In FIG. 1, reference numeral 1 denotes a steel valve box, which has a fluid inlet 1a and an outlet 1b.
２はセラミツク製のケージであつて、その一端
側は上記弁体１の流出口１ｂ部分に嵌着されてい
る。 Reference numeral 2 denotes a cage made of ceramic, one end of which is fitted into the outlet port 1b of the valve body 1.
３はセラミツク製のプラグであつて、弁棒４に
取付けられている。該プラグ３をケージ２内で上
下に摺動せしめることによつて、ケージ２に形成
した開口２ａ及び上記弁箱１の流出口１ｂを開閉
すると共に、開口２ａの開口度を調整して流量を
調整するようになつている。 3 is a plug made of ceramic and is attached to the valve stem 4. By sliding the plug 3 up and down within the cage 2, the opening 2a formed in the cage 2 and the outlet 1b of the valve box 1 are opened and closed, and the degree of opening of the opening 2a is adjusted to control the flow rate. I'm starting to adjust.
５はスペーサであつて、上記弁箱１に一体的に
取付けられた弁蓋６とケージ２の他端側との間に
圧入状態で介挿されている。 Reference numeral 5 denotes a spacer, which is press-fitted between the valve cover 6, which is integrally attached to the valve box 1, and the other end of the cage 2.
７はガスケツトである。 7 is a gasket.
本実施例のバルブは以上のように構成されてい
るので、今、弁箱１の鋼材料の線膨張係数をα1、
ケージ２のセラミツク材料の線膨張係数をα2、ス
ペーサ５の鋼材料の線膨張係数をα3とし、ケージ
２の圧着挿入高さをH2、スペーサ５の高さを
H3、上記ケージシート２及びスペーサ５を挿入
した部分の弁箱１の高さをH1とすると、
α1H1＝α2H2＋α3H3 ……(1)
H1＝H2＋H3 ……(2)
の関係を満足させなければならない。 Since the valve of this embodiment is constructed as described above, the coefficient of linear expansion of the steel material of the valve body 1 is α 1 ,
The linear expansion coefficient of the ceramic material of the cage 2 is α 2 , the linear expansion coefficient of the steel material of the spacer 5 is α 3 , the crimp insertion height of the cage 2 is H 2 , and the height of the spacer 5 is
H 3 and the height of the valve box 1 at the part where the cage seat 2 and spacer 5 are inserted is H 1 , α 1 H 1 = α 2 H 2 + α 3 H 3 ……(1) H 1 = H 2 +H 3 ……(2) must be satisfied.
上記(1)に(2)を代入すると α1（H2＋H3）＝α2H2＋α3H3 α1H2＋α1H3＝α2H2＋α3H3となる。 Substituting (2) into (1) above, α 1 (H 2 + H 3 ) = α 2 H 2 + α 3 H 3 α 1 H 2 + α 1 H 3 = α 2 H 2 + α 3 H 3 .
これに(2)を代入すると、
（α1−α2）H2＝（α3−α1）H3
（ただしα3＞α1＞α2の関係にあるので、α1−α2＞
０、α3−α1＞０である）となり、
H2／H3＝α3−α1／α1−α2が導かれる。Substituting (2) into this, we get (α 1 − α 2 )H 2 = (α 3 − α 1 )H 3 (However, since α 3 > α 1 > α 2 , α 1 − α 2 >
0, α 3 −α 1 >0), and H 2 /H 3 =α 3 −α 1 /α 1 −α 2 is derived.
この結果より、H2とH3の高さの割合は、各熱
膨張率によつて定まることが解る。 From this result, it can be seen that the ratio of the heights of H 2 and H 3 is determined by each coefficient of thermal expansion.
第２図は上記のバルブの弁部材を示すもので、
３は前記第１図に示すセラミツク製のプラグ、４
は例えばフエライトステンレス鋼製の弁軸であ
る。 Figure 2 shows the valve member of the above valve.
3 is a ceramic plug shown in FIG. 1; 4
is, for example, a valve stem made of ferrite stainless steel.
上記プラグ３にはくり抜き穴３ａが形成されて
いて、この中に例えばオーステナイト系ステンレ
ス鋼製の円筒状スペーサブツシユ８が嵌め込ま
れ、スリツト付ナツト９により締付けられてい
る。１０はシーリングである。 A hollow hole 3a is formed in the plug 3, into which a cylindrical space bush 8 made of, for example, austenitic stainless steel is fitted and tightened with a nut 9 with a slit. 10 is sealing.
従つて、本実施例に於いても弁棒４、プラグ３
及びスペーサブツシユ８の線膨張係数を各々α1、
α2及びα3とし、図示のように各長さをH1、H2及
びH3とすると、前述のようにH2とH3の長さの割
合が求められる。 Therefore, also in this embodiment, the valve stem 4 and the plug 3
and the linear expansion coefficient of the spacer bush 8 are α 1 ,
Let α 2 and α 3 be the lengths H 1 , H 2 and H 3 as shown, then the ratio of the lengths of H 2 and H 3 can be found as described above.
［発明の効果］
本発明は、金属製の弁箱とこれに取付けたセラ
ミツク製の弁部材との間に該金属より大きい熱膨
張係数を有する金属製スペーサ等を介挿すること
によつて、流体の温度が変化した場合にも部材間
の弛緩を防止して、完全なシール性を保持するこ
とを可能とした。[Effects of the Invention] The present invention provides a valve body made of metal and a ceramic valve member attached thereto, by inserting a metal spacer or the like having a coefficient of thermal expansion larger than that of the metal. Even when the temperature of the fluid changes, it is possible to prevent loosening between the members and maintain perfect sealing performance.
第１図は、本願発明の一実施例のバルブを示す
断面図、第２図はプラグの断面図である。
１……弁箱、１ａ……流入口、１ｂ……流入
口、２……ケージ、２ａ……開口、３……プラ
グ、３ａ……くり抜き穴、４……弁棒、５……ス
ペーサ、６……弁蓋、７……ガスケツト、８……
スペーサブツシユ、９……スリツト付ナツト、１
０……シールリング。
FIG. 1 is a sectional view showing a valve according to an embodiment of the present invention, and FIG. 2 is a sectional view of a plug. 1...Valve box, 1a...Inflow port, 1b...Inflow port, 2...Cage, 2a...Opening, 3...Plug, 3a...Drilled hole, 4...Valve stem, 5...Spacer, 6... Valve lid, 7... Gasket, 8...
Spacer bush, 9...Nut with slit, 1
0... Seal ring.
Claims (1)
ツク製のシートリング、ケージ、ガイドブツシユ
等の弁部材と、これら弁箱とセラミツク製弁部材
との間に介挿され、上記弁箱の金属より大きい熱
膨張係数を有する金属から成るスペーサ又はブツ
シユ等の第三部材と、から構成されていることを
特徴とするセラミツク製弁部材を有するバルブ。1 A metal valve box, a ceramic valve member such as a seat ring, a cage, a guide bushing, etc. installed in the valve box, and a valve member inserted between the valve box and the ceramic valve member, 1. A valve having a ceramic valve member, comprising a third member such as a spacer or a bush made of a metal having a coefficient of thermal expansion larger than that of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12619885A JPS61286671A (en) | 1985-06-12 | 1985-06-12 | Valve provided with ceramic valve member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12619885A JPS61286671A (en) | 1985-06-12 | 1985-06-12 | Valve provided with ceramic valve member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61286671A JPS61286671A (en) | 1986-12-17 |
| JPH0456190B2 true JPH0456190B2 (en) | 1992-09-07 |
Family
ID=14929129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12619885A Granted JPS61286671A (en) | 1985-06-12 | 1985-06-12 | Valve provided with ceramic valve member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61286671A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3731754A1 (en) * | 1987-09-22 | 1989-04-20 | B & S Metalpraecis Gmbh | THREE-WAY FITTING |
| JP2555963Y2 (en) * | 1991-03-15 | 1997-11-26 | 株式会社本山製作所 | Valve device |
-
1985
- 1985-06-12 JP JP12619885A patent/JPS61286671A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61286671A (en) | 1986-12-17 |
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