JPH032061Y2 - - Google Patents
Info
- Publication number
- JPH032061Y2 JPH032061Y2 JP237186U JP237186U JPH032061Y2 JP H032061 Y2 JPH032061 Y2 JP H032061Y2 JP 237186 U JP237186 U JP 237186U JP 237186 U JP237186 U JP 237186U JP H032061 Y2 JPH032061 Y2 JP H032061Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- sheet
- seat
- memory alloy
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Landscapes
- Lift Valve (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、弁箱側シート部又は弁体側シート部
の少なくとも一方に、ゴム又は合成樹脂製のシー
トを設けてあるバルブに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a valve in which a seat made of rubber or synthetic resin is provided on at least one of the valve body side seat part or the valve body side seat part.
従来、上記バルブでは、ゴム又は合成樹脂製の
シート自体の弾性力だけで、他方のシート部に圧
接させてあつた。
Conventionally, in the above-mentioned valve, the sheet made of rubber or synthetic resin was brought into pressure contact with the other sheet only by the elastic force of the sheet itself.
しかし、バルブの使用温度が上昇するに伴つ
て、ゴム又は合成樹脂製のシートは軟化して弾性
力が減少し、シール性が低下する危険性があつ
た。
However, as the operating temperature of the valve increases, the rubber or synthetic resin sheet becomes softer and its elastic force decreases, posing the risk that the sealing performance will deteriorate.
本考案の目的は、バルブの使用温度上昇に伴う
シール性の低下を抑制できるようにする点にあ
る。 An object of the present invention is to suppress a decrease in sealing performance due to an increase in the operating temperature of the valve.
本考案におけるバルブのシール構造の特徴構成
は、温度上昇に伴つてシートを他方のシート部側
に圧接させるように変形する形状記憶合金を、前
記シートに組付けてあることにあり、その作用効
果は、次の通りである。
The characteristic structure of the valve seal structure of the present invention is that a shape memory alloy that deforms as the temperature rises so as to press the seat against the other seat is assembled to the seat. is as follows.
つまり、温度上昇に伴つて、たとえシート自体
による圧接力が減少しても、シートに組付けてあ
る形状記憶合金が、シートを他方のシート部側に
圧接させるように変形するために、シール性の低
下を抑制できる。
In other words, even if the pressure applied by the sheet itself decreases as the temperature rises, the shape memory alloy attached to the sheet deforms so as to press the sheet against the other sheet, resulting in poor sealing performance. can suppress the decline in
従つて、ゴム又は合成樹脂製のシートを使用し
ながらも、高温時におけるシール性を良好に確保
でき、その上、たとえば閉弁時における他方のシ
ート部側へのシートの圧接力を大に設定しておい
て、高温時のシール性を確保することも考えられ
るが、この場合、低温時においてもシートの圧接
力が大きいために、弁体の開閉操作が簡単に行え
ない欠点を生じるもので、これに対し、本考案
は、高温時におけるシール性を確保しながらも、
低温時には形状記憶合金によるシート圧接力は生
じないために、不必要な圧接をすることなく軽い
操作力で簡単に弁体の開閉を行え、操作性及びシ
ール性を広い温度域において良好に維持できるバ
ルブを提供できるに至つた。
Therefore, even though a rubber or synthetic resin seat is used, it is possible to ensure good sealing performance at high temperatures, and in addition, for example, when the valve is closed, the pressure force of the seat against the other seat part is set to be large. It may be possible to maintain sealing performance at high temperatures by keeping the valve closed, but in this case, the pressure force of the seat is large even at low temperatures, resulting in the disadvantage that the opening and closing operations of the valve body cannot be easily performed. In contrast, the present invention secures sealing performance at high temperatures while
At low temperatures, the shape memory alloy does not generate any sheet pressure, so the valve body can be easily opened and closed with light operating force without unnecessary pressure, and operability and sealing performance can be maintained well over a wide temperature range. We are now able to provide valves.
〔実施例〕
次に、本考案の実施例を、図面に基づいて説明
する。[Example] Next, an example of the present invention will be described based on the drawings.
第３図に示すように、中心軸芯方向P1におい
て一端側から他端側に向かうほど内径が増大する
環状の硬質弁箱側シート１を、弁箱２にボルト連
結して弁箱側シート部Ａを形成し、閉弁時に弁箱
側シート１に内装させる環状の弾性弁体側シート
３を、弁体４にボルト連結された押え金具５で挾
持させた状態で取付けて弁体側シート部Ｂを形成
し、前記弁体側シート３に対してその中心軸芯
P1方向に位相を異にした軸芯P2周りで回転自在
な一対の弁棒６ａ，６ｂを弁箱２に取付け、その
弁棒６ａ，６ｂに弁体４を取付け、もつて、偏芯
型バタフライ弁を構成してある。 As shown in FIG. 3, an annular hard valve box side seat 1 whose inner diameter increases from one end to the other end in the central axis direction P 1 is connected to the valve box 2 by bolts. An annular elastic valve body side seat 3, which forms part A and is placed inside the valve body side seat 1 when the valve is closed, is attached to the valve body 4 while being clamped by a presser fitting 5 bolted to the valve body side seat part B. , and its central axis is aligned with respect to the valve body side seat 3.
A pair of valve stems 6a and 6b that are rotatable around an axis P2 with different phases in the P1 direction are attached to the valve box 2, and a valve body 4 is attached to the valve stems 6a and 6b. It consists of a type butterfly valve.
前記弁体側シート３は実用使用温度範囲60℃ま
でのゴム（NBR）から成り、第１図に示すよう
に、そのゴムシート内に断面が弁体４の径方向に
ほぼくの字形に屈曲した形状記憶合金７を埋設し
てあり、この形状記憶合金７は、温度上昇に伴つ
て、第２図に示すように、屈曲部が伸長しながら
シート３を他方のシート１側に圧接させるよう
に、変形する形状を記憶させてある。 The valve body side seat 3 is made of rubber (NBR) with a practical use temperature range of up to 60°C, and as shown in FIG. A shape memory alloy 7 is embedded, and as the temperature rises, the bent portion of the shape memory alloy 7 expands and presses the sheet 3 against the other sheet 1. , the shape to be deformed is memorized.
前記弾性のシート及びそれに組付ける形状記憶
合金は、弁体側シート部Ｂ以外に弁箱側シート部
Ａ又はそれら双方Ａ，Ｂに設けても良く、第４図
及び第５図に示すように、組付けても良い。そこ
で第４図は、弁箱側シート部Ａに設けるシート１
として、テフロン（PTFE等）を使用したフアイ
アセーフ型シートの改良構造で、PTFEの最大使
用温度は200〜240℃程度で、260℃以上ではその
樹脂の分解速度が早くなりシール性が低下するた
めに、240℃より復元性を発揮する形状記憶合金
７を弁箱２側に取付け、この形状記憶合金７に、
テフロンのシート１を組付けてある。
The elastic sheet and the shape memory alloy attached thereto may be provided in the valve body side seat part A or both A and B in addition to the valve body side seat part B, as shown in FIGS. 4 and 5. You can also assemble it. Therefore, FIG. 4 shows the seat 1 provided on the valve box side seat part A.
This is an improved structure of a fire-safe sheet that uses Teflon (PTFE, etc.).The maximum operating temperature of PTFE is approximately 200 to 240℃, and above 260℃, the decomposition rate of the resin increases and the sealing performance decreases. Then, a shape memory alloy 7 that exhibits resilience at 240°C is attached to the valve body 2 side, and this shape memory alloy 7 is
A Teflon sheet 1 is attached.
そして前記形状記憶合金７の形状は、弁体４径
方向における内径側を薄肉で屈曲形成してあり、
この屈曲先端部７Ａが、温度上昇に伴つて伸長し
て、シート１を弁体４側に押圧する力が働くよう
に、復元形状を記憶させてある。 The shape memory alloy 7 is formed such that the inner diameter side in the radial direction of the valve body 4 is thin and bent.
The restored shape is memorized so that this bent end portion 7A expands as the temperature rises and exerts a force that presses the seat 1 toward the valve body 4 side.
また、第５図に示すように、弁体側シート３を
弁体４径方向に摺動自在に設け、このシート３の
弁体４中心側に温度上昇に伴つて伸長する断面ほ
ぼくの字形に屈曲した形状記憶合金７を内装し
て、高温時には形状記憶合金の復元作用で、シー
ト３を他方の弁箱２側に摺動させて、シート１に
押圧させるように構成しても良い。 Further, as shown in FIG. 5, a valve body side seat 3 is provided to be slidable in the radial direction of the valve body 4, and the seat 3 has a substantially dogleg-shaped cross section extending toward the center of the valve body 4 as the temperature rises. It may be configured such that a bent shape memory alloy 7 is installed inside the valve body and the seat 3 is slid toward the other valve box 2 side and pressed against the seat 1 by the restoring action of the shape memory alloy at high temperatures.
前記シート３に、EPDMゴムを用いた場合に
は、その使用温度限界が蒸気中で約150℃で、こ
れ以上では老化と反発弾性の低下をきたすもの
で、この場合に、150℃で復元性を発揮する形状
記憶合金を用いれば良い。 When EPDM rubber is used for the sheet 3, its operating temperature limit is approximately 150°C in steam; above this temperature, aging and impact resilience will occur; It is sufficient to use a shape memory alloy that exhibits the following properties.
前記形状記憶合金７の形状及びシート１又は３
に対する組付け状態は、前記した以外に変形可能
である。 Shape of the shape memory alloy 7 and sheet 1 or 3
The assembly state for the parts can be modified other than those described above.
本考案は、偏芯タイプで無いバタフライ弁等、
各種構成のバタフライ弁、あるいは、その他の弁
全体に適用できるものである。 This invention is suitable for non-eccentric butterfly valves, etc.
It can be applied to butterfly valves of various configurations or other valves as a whole.
図面は本考案に係るバルブのシール構造の実施
例を示し、第１図は要部の拡大断面図、第２図は
高温時の要部の拡大断面図、第３図はバタフライ
弁の全体縦断面図、第４図及び第５図は夫々別実
施例を示す要部の拡大断面図である。
３……シート、７……形状記憶合金、Ａ……弁
箱側シート部、Ｂ……弁体側シート部。
The drawings show an embodiment of the valve sealing structure according to the present invention. Figure 1 is an enlarged cross-sectional view of the main parts, Figure 2 is an enlarged cross-sectional view of the main parts at high temperatures, and Figure 3 is an overall longitudinal cross-section of the butterfly valve. The plan view, FIG. 4, and FIG. 5 are enlarged sectional views of main parts showing different embodiments. 3... Seat, 7... Shape memory alloy, A... Valve box side seat portion, B... Valve body side seat portion.
Claims (1)
くとも一方に、ゴム又は合成樹脂製のシート３を
設けてあるバルブにおいて、温度上昇に伴つて前
記シート３を他方のシート部側に圧接させるよう
に変形する形状記憶合金７を、前記シート３に組
付けてあるバルブのシール構造。 In a valve in which a sheet 3 made of rubber or synthetic resin is provided on at least one of the valve body side seat part A or the valve body side seat part B, the sheet 3 is brought into pressure contact with the other seat part side as the temperature rises. A valve seal structure in which a shape memory alloy 7 that deforms as described above is assembled to the seat 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP237186U JPH032061Y2 (en) | 1986-01-11 | 1986-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP237186U JPH032061Y2 (en) | 1986-01-11 | 1986-01-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62114275U JPS62114275U (en) | 1987-07-21 |
| JPH032061Y2 true JPH032061Y2 (en) | 1991-01-21 |
Family
ID=30781149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP237186U Expired JPH032061Y2 (en) | 1986-01-11 | 1986-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032061Y2 (en) |
-
1986
- 1986-01-11 JP JP237186U patent/JPH032061Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62114275U (en) | 1987-07-21 |
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