JPH03596Y2 - - Google Patents
Info
- Publication number
- JPH03596Y2 JPH03596Y2 JP8756985U JP8756985U JPH03596Y2 JP H03596 Y2 JPH03596 Y2 JP H03596Y2 JP 8756985 U JP8756985 U JP 8756985U JP 8756985 U JP8756985 U JP 8756985U JP H03596 Y2 JPH03596 Y2 JP H03596Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- ceramic
- metal
- valve stem
- 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
Landscapes
- Sliding Valves (AREA)
- Lift Valve (AREA)
Description
【考案の詳細な説明】
［考案の目的］
産業上の利用分野
本考案は、セラミツク製の弁部材に関するもの
である。[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to a valve member made of ceramic.
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.
考案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
金属製部材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、シール部材の洩れを惹
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 this ceramic is 1/2 to 1/3 smaller than that of the surrounding metal member to which it is attached, so if you try to use this solid ceramic member for a valve that passes fluids other than room temperature, The difference in expansion coefficients may cause loosening between the ceramic member and the surrounding metal member, which may cause the seal member to leak.
本考案は、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
定して取付けておくことが出来る新規なセラミツ
ク製弁部材を提供するにある。 The present invention was devised to solve the above-mentioned conventional problems, and its purpose is to create a new system that can be installed stably at all times without loosening even when the temperature of the fluid changes. To provide a valve member made of ceramic.
［考案の構成］
問題点を解決するための手段
本考案のセラミツク製弁部材は、金属製の弁棒
と該弁棒に装着したセラミツク製の弁プラグ又は
ピストン等の弁部材と、該弁棒とセラミツク製弁
部材との間に介挿され、上記弁棒の金属より大き
い燃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] Means for solving the problem The ceramic valve member of the present invention comprises a metal valve stem, a valve member such as a ceramic valve plug or piston attached to the valve stem, and the valve stem. and a third member, such as a spacer or bushing, which is inserted between the valve member and the ceramic valve member and is made of a metal having a coefficient of combustion expansion larger than that of the metal of the valve stem. be.
実施例
以下、本考案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を有する。 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の開口度を調節して流量を
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に一対的に
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 attached to the valve box 1 as a pair, 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の高さと
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、本願考案の実施例を示すもので、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。 FIG. 2 shows an embodiment of the invention of the present application.
1 is a ceramic plug shown in FIG. 1, and 4 is a valve shaft made of ferrite stainless steel, for example.
上記プラグ３にはくり抜き穴３ａが形成されて
いて、この中には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はシールリングである。 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 a seal ring.
従つて、上記弁棒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、
H2／H3＝α3−α1／α1−α2 が導かれ、
H2とH3の長さの割合が求められる。 Therefore, the linear expansion coefficients of the valve stem 4, plug 3 and spacer bush 8 are α 1 , α 2 and α 3 respectively,
As shown in the figure, if each length is H 1 , H 2 and H 3 , H 2 /H 3 = α 3 − α 1 /α 1 − α 2 is derived, and the ratio of the lengths of H 2 and H 3 is obtained. is required.
［考案の効果］
本考案は、金属製の弁棒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 has the following advantages: By inserting a metal spacer or the like having a coefficient of thermal expansion larger than that of the metal between the metal valve stem and the ceramic valve member attached to the metal valve stem, 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、本願考案の弁部材を取り付けたバル
ブの実施例を示す断面図、第２図は本願考案の弁
部材の一実施例を示す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、シ
ールリング。
FIG. 1 is a sectional view showing an embodiment of a valve to which the valve member of the invention is attached, and FIG. 2 is a sectional view of a plug showing an embodiment of the valve member of the invention. 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, seal ring.
Claims (1)
製の弁プラグ又はピストン等の弁部材と、該弁棒
とセラミツク製弁部材との間に介挿され、上記弁
棒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。 A metal valve stem and a valve member such as a ceramic valve plug or piston attached to the valve stem are inserted between the valve stem and the ceramic valve member, and are heated to a temperature greater than that of the metal of the valve stem. A ceramic valve member comprising a third member such as a spacer or a bush made of a metal having an expansion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8756985U JPH03596Y2 (en) | 1985-06-12 | 1985-06-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8756985U JPH03596Y2 (en) | 1985-06-12 | 1985-06-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61204072U JPS61204072U (en) | 1986-12-22 |
| JPH03596Y2 true JPH03596Y2 (en) | 1991-01-10 |
Family
ID=30639910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8756985U Expired JPH03596Y2 (en) | 1985-06-12 | 1985-06-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03596Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101513088B1 (en) * | 2014-04-15 | 2015-04-21 | 주식회사 코밸 | A control valve for cryogenic high pressure gas which having double plug structure |
-
1985
- 1985-06-12 JP JP8756985U patent/JPH03596Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61204072U (en) | 1986-12-22 |
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