JPS6252191B2 - - Google Patents
Info
- Publication number
- JPS6252191B2 JPS6252191B2 JP56159731A JP15973181A JPS6252191B2 JP S6252191 B2 JPS6252191 B2 JP S6252191B2 JP 56159731 A JP56159731 A JP 56159731A JP 15973181 A JP15973181 A JP 15973181A JP S6252191 B2 JPS6252191 B2 JP S6252191B2
- Authority
- JP
- Japan
- Prior art keywords
- elastic
- valve
- main body
- lining
- annular groove
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 22
- 230000035699 permeability Effects 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 239000002033 PVDF binder Substances 0.000 description 16
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 16
- 239000007789 gas Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000013013 elastic material Substances 0.000 description 5
- 229920001084 poly(chloroprene) Polymers 0.000 description 5
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Description
本発明は耐食性蝶形弁の改良に関するものであ
る。さらに詳述すれば、とくに高濃度で高温（70
℃以上）の腐食性ガスに耐えうる蝶形弁に関する
ものである。ただし、被処理流体が必要に応じ液
等であつても差支えない。
蝶形弁の耐食性を改良したものとしては、流体
と弁体および本体との接触面をフツ素樹脂の如き
ものでライニングすることによつて耐食性を与え
るとともに、本体内側に、フツ素樹脂の如き高度
の耐薬品性の樹脂よりなるライニングを弾性体で
裏打ちした構造とすることによつて、弁体と本体
との密着性を高めたものがすでに知られている。
これらの形式の蝶形弁において、一般にライニ
ング材として使用されるフツ素樹脂は、二フツ化
ビニリデン樹脂（以下、P.V.D.Fと略称する）な
どがあり、裏打弾性体としては、天然ゴムや合成
ゴムなどが使用されている。このタイプの蝶形弁
を高濃度で70℃以上の高温の腐食性ガス、たとえ
ば塩素ガスなどの配管に使用した場合、ライニン
グ材としてのP.V.D.Fはガス透過度が小さいた
め、（80℃塩素ガスの透過度9.32×10-10c.c.．cm／
cm2．sec.cmHg）塩素ガスはほとんど通さず、裏
打弾性体を腐食させることはないが、透湿度が大
きいため、（40℃で230×10-10c.c.．cm／cm2．sec.
cmHg，80℃で516×10-10c.c.．cm／cm2．sec.cm
Hg）塩素ガス中に含まれる水分は浸透する。（参
考までに四フツ化エチレン樹脂の透湿度は36×
10-10c.c.．cm／cm2．sec.cmHgである。）裏打弾性体
が不透湿性である場合は、長期間使用している
と、P.V.D.Fと裏打弾性体の間に浸入し、P.V.D.
Fと裏打弾性体との接着を剥離させ、その部分に
溜つてくる。
つぎにその溜つた水がP.V.D.Fを押し上げ、開
閉時の弁体との摩擦により、P.V.D.Fが破れ、塩
素ガスによる裏打弾性体の腐食が付随して発生
し、蝶形弁の使用が困難となる。また裏打弾性体
が透湿性である場合にはP.V.D.Fおよび弾性体を
浸透してきた水分が本体と裏打弾性体との間に溜
り、裏打弾性体が変形する原因となる。
以上のような従来の蝶形弁の問題点にかんが
み、本発明者は、P.V.D.Fの如きものでライニン
グされた裏打弾性体に、透湿性の良好な弾性体、
ブタジエン、アクリロニトリルゴム（NBR）、ク
ロロプレンゴム（CR）などを使用して、P.V.D.
Fと裏打弾性体との間に溜る水による両者の剥離
を防止し、裏打弾性体の外側（本体との嵌合部）
には裏打弾性体を浸透してきた水分を溜めるため
に、弁軸と嵌合する開口部の周囲に環状溝を、さ
らにこの環状溝と連通した１〜数本の平行な環状
溝を外周部に設け、（従来の蝶形弁においては裏
打弾性体の外周部に環状溝はあるが、これは連通
しておらず、裏打弾性体にかかる応力を緩和させ
る目的だけに設けられていた。）さらに環状溝に
溜つた水を本体外に逃すために、本体の外周部に
数個の水逃し穴を設けた構造の蝶形弁を発明し、
P.V.D.Fと裏打弾性体との間および裏打弾性体と
本体との間に溜る水を本体外に逃がすことによ
り、従来の蝶形弁の問題点を解決し、その使用期
間を従来の１年を２年以上に延長することができ
た。
したがつて、本発明の目的は、裏打弾性体と弁
の本体との間のところに貯溜する有害な水分を効
果的に除去して弁外に排出しうるように構成され
た新規な改良型の蝶形弁を提供するにあり、その
要旨は頭書に記載された特許請求の範囲に掲載し
たとおりである。
なお、弁には弁軸の支え部が弁の上下に存在し
ているので、本発明において「環状溝」という
も、必ずしも弁の全周を巻回するものであること
を要せず、中途が中断される等の如きことによる
部分巻回をも包含するものであることに注意せね
ばならない。
以下に本発明の好適な実施例を図面にしたがつ
て説明する。
第１図において本体はボルト７で結合されてい
る２つの本体部分１と２との結合体よりなつてお
り、中央には円筒状の孔があいている。本体Ａの
円筒状の孔には、弾性体４によつて裏打されたP.
V.D.Fのライニング材３がある。ライニング材３
は円筒状の孔を有し、その外周面は本体部分１，
２と嵌合している。ライニング材３の上下頂端部
には弁軸６が通る開口部がある。P.V.D.Fのガス
透過率は、きわめて小さいため、薄いライニング
であつても、ガス透過による裏打弾性体４の劣化
はない。しかしながら透湿性はかなり良いため腐
食性ガス中に含まれる数パーセントの水分をも浸
透させてしまう。
裏打弾性体４へのP.V.D.Fよりなるライニング
材３は、粉末焼成によつて容易かつ安価に行うこ
とができるが、本発明の実施態様においては、P.
V.D.Fを浸透した水分による影響を少くし、でき
るだけP.V.D.F材と裏打弾性体との間の密着度を
高めるため、フエノール樹脂系の接着剤メタロツ
タＲ−26−Ｂ（東洋化学研究所製）を使用してい
る。
前述のように、４は透湿性の良好な裏打弾性体
であり、P.V.D.F材を通過した水分を浸透させ、
P.V.D.F材と裏打弾性体との間に水が滞留するこ
とを防止している。裏打弾性体４は一般に天然ゴ
ムや合成ゴムなどが使用されるが、その中でも透
湿性がきわめて良好なものとして、クロロプレン
ゴム（CR）や、ブタジエンゴム（NBR）などが
ある。
裏打弾性体４が本体Ａと接する側には、第２
図、第３図、第４図からわかるように、１〜数本
（図面には１実施例として５本の場合が示してあ
る）の平行な環状溝４ａが設けてあり、裏打弾性
体を浸透してきた水分が環状溝４ａを伝わつて下
方へ流れ、溜るようになつている。なお、この場
合の「下方」というのは、図面についていうので
はなく、弁の実装状態を基準として説明している
わけである。
前述のように、環状溝４ａの数は特に限定しな
いが、３〜５本がもつとも適当である。環状溝４
ａの巾は均一でなくてもよいが、設置場所は、弁
体５を閉位置にしたときの弁体５とライニング材
３との接触周面を中心にして、なるべく左右対称
の位置に、かつ裏打弾性体４の巾全体に均等に分
散させた位置にすると、きわめて良好である。こ
のようにすれば前記目的のほかに、弁体５の開閉
のさい、裏打弾性体４にかかる応力を均一に分散
させることができるためでもある。また環状溝４
ａの深さは裏打弾性体４の厚さの1/3〜1/4程度と
することが好ましい。
なお第３図、第４図に示すごとく、裏打弾性体
４の上下頂端部にある弁軸６が通る開口部の、本
体Ａと接する側の周囲にも、環状溝４ｂが設けて
あり、各平行配置の前記の環状溝４ａと連通して
いる。両者が連通していない場合には、本体Ａを
貫通している水逃し穴をすべての環状溝と連通す
るように設けなければならず、当然穴径が大きく
なり、本体Ａの強度に影響をおよぼすことにな
る。逆に本発明の実施例のように両者が連通して
いる場合には、１つの環状溝と連通した水逃し穴
を本体Ａに設ければよく、各溝に溜つた水は逃し
穴の方へ流れ込み、穴の径も小さくてよい。
５はポリテトラフルオロエチレンからなる弁体
であり、６は弁軸である。円板状の弁体５はこの
弁軸６によつて支持されている。
１ａおよび２ａは本体Ａの外周部を貫通して設
けた水逃し穴で、裏打弾性体の環状溝と連通し、
環状溝に溜つた水を本体外に逃す働きをする。逃
し穴の位置は蝶形弁の取付状態を考慮し、本体Ａ
の外周に適当に分散させて設けた方がよく、その
数は限定しないが４〜６個が適当であることにつ
いては既述した。また水逃し穴の径はとくに限定
しないが、３〜10mmφが適当である。
以上説明した如く、本発明の蝶形弁は本体側の
二フツ化ビニリデン樹脂ライニングの裏打弾性体
として、透湿性の良好な弾性体を使用し、その外
側には弁軸と嵌合する開口部の周囲に環状溝を設
け、さらに外周部に前記溝と連通する平行な環状
溝を設け、また本体には水逃し穴１ａ，２ａを貫
通して設けることにより、70℃以上の高温・高濃
度・腐食性ガス中の水分を本体外へ排出できるよ
うにすることにより、従来の蝶形弁においてライ
ニング材と裏打弾性体との剥離および裏打弾性体
の変形が起ることを防止し、蝶形弁の寿命を大巾
に延長した耐食性の良好なものを創造し得たもの
である。
なお本発明の蝶形弁は高温腐食性ガス用に限定
されるものではなく、必要に応じ、液用にも使用
しうる。
なお、本発明の実施にあたり、裏打弾性体の透
湿性を適宜考慮して、選択使用をすることが望ま
しい。
この目的に供するための参考データを以下に作
表により例示しておく。
The present invention relates to improvements in corrosion-resistant butterfly valves. In more detail, especially at high concentrations and high temperatures (70
This relates to butterfly valves that can withstand corrosive gases at temperatures above 30°F. However, the fluid to be treated may be a liquid or the like if necessary. In order to improve the corrosion resistance of butterfly valves, the contact surfaces between the fluid, the valve body, and the main body are lined with a material such as fluororesin to provide corrosion resistance, and the inside of the main body is lined with a material such as fluororesin. There is already known a structure in which a lining made of highly chemical-resistant resin is backed with an elastic material, thereby increasing the adhesion between the valve body and the main body. In these types of butterfly valves, the fluorocarbon resin generally used as the lining material is vinylidene difluoride resin (hereinafter abbreviated as PVDF), and the elastic lining material is natural rubber, synthetic rubber, etc. is used. When this type of butterfly valve is used in piping for high-concentration and high-temperature corrosive gases (e.g. chlorine gas, etc.) at temperatures above 70°C, PVDF as a lining material has low gas permeability. Transparency 9.32×10 -10 cc.cm/
cm2 ． sec.cmHg) Chlorine gas hardly passes through and does not corrode the elastic lining, but it has a high moisture permeability (230 x 10 -10 cc.cm/cm 2 .sec. at 40℃).
cmHg, 516×10 -10 cc at 80℃. cm/ cm2 . sec.cm
Hg) Moisture contained in chlorine gas permeates. (For reference, the moisture permeability of tetrafluoroethylene resin is 36×
10 -10 cc. cm/ cm2 . sec.cmHg. ) If the backing elastic is moisture-impermeable, after long-term use, it will penetrate between the PVDF and the backing elastic, and the PVD
The adhesive between F and the elastic backing material is peeled off, and it accumulates in that area. Next, the accumulated water pushes up the PVDF, and due to friction with the valve body during opening and closing, the PVDF ruptures, and the chlorine gas causes corrosion of the elastic lining, making it difficult to use the butterfly valve. Furthermore, if the elastic backing is moisture permeable, water that has permeated through the PVDF and the elastic will accumulate between the main body and the elastic backing, causing deformation of the elastic backing. In view of the above-mentioned problems with the conventional butterfly valve, the present inventors added an elastic material with good moisture permeability to the backing elastic material lined with something like PVDF.
PVD using butadiene, acrylonitrile rubber (NBR), chloroprene rubber (CR), etc.
This prevents separation between F and the elastic lining body due to water that collects between them, and prevents them from peeling off from each other due to water accumulated between F and the elastic lining body.
In order to collect water that has permeated through the elastic lining, an annular groove is formed around the opening that fits into the valve stem, and one to several parallel annular grooves communicating with this annular groove are formed on the outer periphery. (In conventional butterfly-shaped valves, there is an annular groove on the outer periphery of the elastic lining, but this is not continuous and was provided only for the purpose of relieving stress on the elastic lining.) Invented a butterfly valve with a structure in which several water relief holes were provided on the outer periphery of the main body in order to release the water accumulated in the annular groove outside the main body.
By allowing the water that accumulates between the PVDF and the elastic lining and between the elastic lining and the main body to escape outside the main body, we have solved the problems of conventional butterfly valves and shortened the usage period from 1 year to 2. It could be extended for more than a year. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a new and improved type of water which is configured to effectively remove and discharge harmful moisture accumulated between the elastic lining and the main body of the valve. The purpose of the present invention is to provide a butterfly-shaped valve, the gist of which is as stated in the claims set forth in the header. In addition, since the valve has supporting parts for the valve stem above and below the valve, in the present invention, the term "annular groove" does not necessarily mean that it wraps around the entire circumference of the valve, but rather that it extends halfway around the valve. It must be noted that this also includes partial windings due to interruptions, etc. Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the main body consists of two main body parts 1 and 2 joined together by a bolt 7, and has a cylindrical hole in the center. The cylindrical hole of the main body A has a P. lined with an elastic body 4.
There is a VDF lining material 3. Lining material 3
has a cylindrical hole, the outer peripheral surface of which is connected to the main body portion 1,
It is mated with 2. There are openings at the top and bottom ends of the lining material 3, through which the valve shaft 6 passes. Since the gas permeability of PVDF is extremely low, even if the lining is thin, the elastic lining body 4 will not deteriorate due to gas permeation. However, its moisture permeability is quite good, allowing even several percent of water contained in corrosive gases to permeate through it. The lining material 3 made of PVDF to the backing elastic body 4 can be easily and inexpensively made by powder firing, but in the embodiment of the present invention, P.
In order to reduce the effect of moisture penetrating the VDF and to increase the degree of adhesion between the PVDF material and the elastic backing as much as possible, we used the phenolic resin adhesive Metallottsuta R-26-B (manufactured by Toyo Kagaku Kenkyusho). ing. As mentioned above, 4 is a backing elastic body with good moisture permeability, which allows moisture that has passed through the PVDF material to penetrate.
This prevents water from remaining between the PVDF material and the elastic backing. The elastic backing material 4 is generally made of natural rubber, synthetic rubber, or the like, and among these, chloroprene rubber (CR) and butadiene rubber (NBR) are examples of materials with extremely good moisture permeability. On the side where the backing elastic body 4 contacts the main body A, a second
As can be seen from the figures, FIG. 3, and FIG. The water that has penetrated flows downward through the annular groove 4a and accumulates therein. Note that "downward" in this case does not refer to the drawings, but is explained based on the mounting state of the valve. As mentioned above, the number of annular grooves 4a is not particularly limited, but 3 to 5 is suitable. Annular groove 4
The width of a does not have to be uniform, but the installation location should be as symmetrical as possible around the contact peripheral surface between the valve body 5 and the lining material 3 when the valve body 5 is in the closed position. In addition, it is very good if the positions are evenly distributed over the entire width of the backing elastic body 4. In addition to the above-mentioned purpose, this is also because the stress applied to the elastic backing body 4 can be uniformly distributed when the valve body 5 is opened and closed. Also, the annular groove 4
The depth of a is preferably about 1/3 to 1/4 of the thickness of the elastic backing body 4. As shown in FIGS. 3 and 4, an annular groove 4b is also provided around the side that contacts the main body A of the opening through which the valve stem 6 passes through the upper and lower top ends of the elastic lining body 4. It communicates with the annular groove 4a arranged in parallel. If the two do not communicate, the water relief hole penetrating body A must be provided so as to communicate with all the annular grooves, which naturally increases the hole diameter and affects the strength of body A. It will cause a lot of trouble. On the other hand, when the two communicate with each other as in the embodiment of the present invention, it is sufficient to provide a water relief hole in the main body A that communicates with one annular groove, and the water accumulated in each groove is directed to the relief hole. The diameter of the hole may be small. 5 is a valve body made of polytetrafluoroethylene, and 6 is a valve stem. A disk-shaped valve body 5 is supported by this valve shaft 6. 1a and 2a are water release holes provided through the outer periphery of the main body A, communicating with the annular groove of the elastic lining body;
It functions to release water accumulated in the annular groove to the outside of the main body. The position of the relief hole is determined by considering the installation condition of the butterfly valve.
It is better to provide them appropriately distributed around the outer periphery, and it has already been mentioned that the number is not limited, but 4 to 6 is suitable. Further, the diameter of the water escape hole is not particularly limited, but a diameter of 3 to 10 mm is appropriate. As explained above, the butterfly valve of the present invention uses an elastic material with good moisture permeability as the lining elastic material for the vinylidene difluoride resin lining on the main body side, and has an opening on the outside that fits with the valve stem. An annular groove is provided around the periphery, and a parallel annular groove is provided on the outer periphery that communicates with the groove, and the main body is provided with water release holes 1a and 2a that penetrate through it.・By allowing moisture in corrosive gas to be discharged outside the main body, separation of the lining material from the elastic backing body and deformation of the elastic backing body in conventional butterfly-shaped valves can be prevented, and the butterfly-shaped We were able to create a valve with good corrosion resistance that greatly extended its lifespan. Note that the butterfly valve of the present invention is not limited to use with high-temperature corrosive gases, but can also be used with liquids if necessary. In carrying out the present invention, it is desirable to appropriately consider the moisture permeability of the elastic backing material and use it selectively. Examples of reference data for this purpose are listed below.
【表】
以上のデータからPVDFより天然ゴム、合成ゴ
ムの方が透湿性がよく、またNBR，CRは一般ゴ
ムNR，EPR，SBRより透湿性がよいため、
PVDFと裏打弾性体との間に水が溜まる量は非常
に少ない。[Table] From the above data, natural rubber and synthetic rubber have better moisture permeability than PVDF, and NBR and CR have better moisture permeability than general rubber NR, EPR, and SBR.
The amount of water that accumulates between the PVDF and the elastic backing is very small.
第１図は本発明の蝶形弁を一部正面図残して示
した中央断面図、第２図は第１図の−′線に
沿つて切断した横断面図、第３図は裏打弾性体お
よびライニング材の平面図、第４図は裏打弾性体
の立面図である。
これらの図において、Ａ……本体、１，２……
本体部分、１ａ，２ａ……水逃し穴、３……ライ
ニング材（P.V.D.F）、４……裏打弾性体、４
ａ，４ｂ……環状溝、５……弁体、６……弁軸、
７……ボルト。
Fig. 1 is a central sectional view showing the butterfly valve of the present invention with a part of the front view left, Fig. 2 is a transverse sectional view taken along the line -' in Fig. 1, and Fig. 3 is an elastic lining body. FIG. 4 is a plan view of the lining material, and FIG. 4 is an elevational view of the lining elastic body. In these figures, A... main body, 1, 2...
Main body part, 1a, 2a...Water release hole, 3...Lining material (PVDF), 4...Elastic backing material, 4
a, 4b... annular groove, 5... valve body, 6... valve stem,
7...Bolt.
Claims (1)
動によつて開閉し得る弁体とを有し、前記本体の
流体通路の内面に、高度の耐化学薬品性と小さな
ガス透過率とを有する樹脂よりなるライニングが
弾性体によつて裏打ちされたシール部材を装着し
た蝶形弁において、前記裏打ち弾性体を、水分透
過性の良好な材料にて構成し、この弾性体の、本
体内面に接する外面上に適当数の第１の環状溝を
設け、また前記裏打ち弾性体の弁軸用開口部の、
前記本体と接する側の周囲に、前記第１の環状溝
と連通する第２の環状溝を設け、さらに前記本体
にはこれを貫通する水逃し穴を設けてこの水逃し
穴を前記第１及び第２の環状溝に連通せしめ、弁
の内部から前記ライニング及び裏打ち弾性体を透
過して裏打ち弾性体と本体との間に蓄積する水分
を、弁外に排出するようにしたことを特徴とする
蝶形弁。1. It has a main body having a fluid passage and a valve body that can open and close this fluid passage by rotation, and the inner surface of the fluid passage of the main body has high chemical resistance and low gas permeability. In a butterfly valve equipped with a sealing member whose lining made of resin is backed by an elastic body, the elastic lining is made of a material with good moisture permeability, and the elastic body is in contact with the inner surface of the main body. a suitable number of first annular grooves are provided on the outer surface of the valve stem opening of the elastic lining;
A second annular groove communicating with the first annular groove is provided around the side in contact with the main body, and a water release hole passing through the main body is further provided so that the water release hole connects to the first and second annular grooves. The valve is connected to the second annular groove so that water that passes through the lining and the elastic lining from inside the valve and accumulates between the elastic lining and the main body is discharged to the outside of the valve. Butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15973181A JPS5861369A (en) | 1981-10-07 | 1981-10-07 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15973181A JPS5861369A (en) | 1981-10-07 | 1981-10-07 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5861369A JPS5861369A (en) | 1983-04-12 |
| JPS6252191B2 true JPS6252191B2 (en) | 1987-11-04 |
Family
ID=15700037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15973181A Granted JPS5861369A (en) | 1981-10-07 | 1981-10-07 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5861369A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP1530618S (en) | 2014-10-09 | 2015-08-10 | ||
| JP6715692B2 (en) * | 2016-06-17 | 2020-07-01 | 旭有機材株式会社 | Seat ring for butterfly valve and butterfly valve having the same |
| CN111173986B (en) * | 2020-01-20 | 2021-07-27 | 良工阀门集团有限公司 | Pre-decompression butterfly valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631464A (en) * | 1979-08-20 | 1981-03-30 | Tokico Ltd | Reciprocator |
-
1981
- 1981-10-07 JP JP15973181A patent/JPS5861369A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631464A (en) * | 1979-08-20 | 1981-03-30 | Tokico Ltd | Reciprocator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5861369A (en) | 1983-04-12 |
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