JPH0128389Y2 - - Google Patents
Info
- Publication number
- JPH0128389Y2 JPH0128389Y2 JP3467885U JP3467885U JPH0128389Y2 JP H0128389 Y2 JPH0128389 Y2 JP H0128389Y2 JP 3467885 U JP3467885 U JP 3467885U JP 3467885 U JP3467885 U JP 3467885U JP H0128389 Y2 JPH0128389 Y2 JP H0128389Y2
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing member
- valve
- annular
- rubber
- seat ring
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 60
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 21
- 238000007789 sealing Methods 0.000 description 11
- 239000011800 void material Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002356 single layer 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、補強部材入りのバタフライ弁のシー
トリング、特にその補強部材の構造に関し、液
体、気体等の流体を扱うポンプの吸入管路、粉体
の真空輸送管路等、管路が真空状態になる各種真
空（103Torr程度）管路、並びに上記ポンプの出
口管路、消火栓等の出口弁等、高差圧（△p20
Kg／cm2以下）、高流速（噴流速度50ｍ／ｓ以下）
に使用される中心形バタフライ弁に利用される。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the seat ring of a butterfly valve containing a reinforcing member, particularly the structure of the reinforcing member, and the suction pipe of a pump that handles fluids such as liquids and gases. High differential pressure (△p20
Kg/cm 2 or less), high flow velocity (jet velocity 50m/s or less)
Used for central butterfly valves used in
（従来の技術）
従来、バタフライ弁の弁座にゴム等の弾性体か
らなる環状のシートリングを装着し、該弾性体
に、剛性を増すために補強部材を埋設し、該補強
部材を特にリング状に成形すると共に、その両端
部に縁を設けた補強輪とし、この補強輪の円筒状
部の外部を空隙としたものは、特公昭59−7069号
公報に示すように従来公知である。(Prior Art) Conventionally, an annular seat ring made of an elastic body such as rubber is attached to the valve seat of a butterfly valve, and a reinforcing member is embedded in the elastic body to increase rigidity. As shown in Japanese Patent Publication No. 59-7069, a reinforcing ring formed into a shape with edges provided at both ends, with a gap formed outside the cylindrical part of the reinforcing ring, is known in the art.
上記従来公知のものは、第７図に示すように、
弁本体１の内部に、弾性弁座４を装着し、弁の閉
鎖時、弁軸３に支持された弁板２の周縁部２ａと
密着させて該弁座を密閉するようにし、また弾性
弁座４に埋設された補強輪６は、両端部に縁８を
設けた円筒状部７からなり、その外面にゴム部材
５を付着させない空隙９を形成するように構成さ
れている。 The above-mentioned conventionally known method is as shown in FIG.
An elastic valve seat 4 is installed inside the valve body 1, and when the valve is closed, the valve seat is brought into close contact with the peripheral edge 2a of the valve plate 2 supported by the valve shaft 3 to seal the valve seat. The reinforcing ring 6 embedded in the seat 4 consists of a cylindrical part 7 with edges 8 at both ends, and is configured to form a gap 9 on its outer surface to prevent the rubber member 5 from adhering.
上記のように、補強輪７の外面に空隙９を形成
したことにより、ゴム部材５の使用がそれだけ少
なくなつて材料節約となる（第１効果）ほか、弁
の閉止状態で弁体２の先端２ａがゴム部材５の中
央部５ａに接触押圧する時の該ゴム部材５の反撥
力は、ゴム部材５と補強輪６と空隙９の各弾性作
用による相乗効果により、第８図に示すように、
弁体の喰い込みたわみ量（横軸）に対する反撥力
（縦軸）の関係Ｂが、空隙を有しない環状の補強
部材を埋設した従来のものＡと比べて、大巾に緩
やかな勾配となり、同じ反撥力f1，f2を得るため
には、従来のものがa1，a2であるのに比べてb1，
b2という広い範囲でたわみ量を設定すればよく、
従つて製造に当つてい広い範囲でたわみ量を調整
すればよいので、少々雑な作り方でも漏れ止め効
果は十分発揮される（第２効果）といわれてい
た。 As described above, by forming the void 9 on the outer surface of the reinforcing ring 7, the use of the rubber member 5 is reduced and material is saved (first effect). When the rubber member 2a contacts and presses the central portion 5a of the rubber member 5, the repulsive force of the rubber member 5 is as shown in FIG. ,
The relationship B between the repulsive force (vertical axis) and the amount of biting deflection (horizontal axis) of the valve body has a much gentler slope compared to the conventional type A in which an annular reinforcing member with no voids is embedded. In order to obtain the same repulsive forces f 1 and f 2 , b 1 ,
b The amount of deflection can be set within a wide range of 2 ,
Therefore, since the amount of deflection can be adjusted within a wide range during manufacturing, it is said that even if the manufacturing process is a little complicated, the leak-preventing effect can be sufficiently exhibited (second effect).
（考案が解決しようとする問題点）
一般に、この種のバタフライ弁における第１の
必要要件は、フランジに挾着されて、且つ弁座の
シール性を保持する点にある。このような点から
みて、上記した従来公知のバタフライ弁は、フラ
ンジ挾着面のシール性と弁座シール性に矛盾を生
じる。即ち、フランジ挾着面に要求される性能と
して、配管フランジ面が常に平滑で芯ずれがない
状態を求めるのは現実的でない。何故なら、配管
工事現場においてフランジ面の傷、多少の凹凸、
また反り、芯ずれ等が必らず起こり、シートリン
グのフランジ当り面に全周に亘つて均一な締付を
行なうことは実際上不可能に近いからであり、し
かも、そのような好ましくない環境でシール性を
発揮することが要求される。そのために、シート
リングのフランジ面に要求される技術的要件とし
て、上記従来例における補強部材の縁８に、かな
り強固な剛性を保持させることが要求される。さ
もないと、フランジ面のシールは不可能だからで
ある。(Problems to be Solved by the Invention) Generally, the first requirement for this type of butterfly valve is that it be clamped to a flange and maintain the sealing properties of the valve seat. From this point of view, the conventionally known butterfly valve described above has a conflict between the sealing performance of the flange clamping surface and the sealing performance of the valve seat. That is, as a performance required of the flange clamping surface, it is not realistic to require that the pipe flange surface is always smooth and free of misalignment. This is because the flange surface may be scratched, have some irregularities, etc. at the piping construction site.
In addition, warping, misalignment, etc. will inevitably occur, and it is practically impossible to tighten uniformly over the entire circumference of the seat ring's flange contact surface. It is required to exhibit sealing performance at Therefore, as a technical requirement for the flange surface of the seat ring, the edge 8 of the reinforcing member in the conventional example described above is required to maintain considerably strong rigidity. Otherwise, it would be impossible to seal the flange surface.
次に、弁体喰い込み部のたわみ量については、
上記従来例でゴム部材の節約を第１の効果に挙げ
ているが、空隙９を設けた補強輪の円筒状部７の
部分は、通常ゴムの肉厚が薄くなるところであ
り、またゴムのシール性は、ゴムの総肉厚の10〜
15％程度に調整されるため、ゴム厚が薄くなれ
ば、それだけシール幅が小さくなるのが普通で、
ゴムの肉厚を薄くすることは、少々雑な作り方で
はとてもシール効果が期待できない。そのため、
補強部材６がスプリングバツク効果を発揮するた
めには補強部材の肉厚が厚くてはその効果が出な
い。 Next, regarding the amount of deflection of the part where the valve body bites,
In the above conventional example, the first effect is the saving of rubber members, but the cylindrical portion 7 of the reinforcing ring with the gap 9 is where the rubber wall thickness is usually thinner, and the rubber seal is The thickness is 10 to 10% of the total thickness of the rubber.
It is adjusted to about 15%, so the thinner the rubber, the smaller the seal width will normally be.
If the thickness of the rubber is made thinner, the sealing effect cannot be expected if it is made in a somewhat sloppy manner. Therefore,
In order for the reinforcing member 6 to exhibit a springback effect, the reinforcing member must be thick.
さらにまた、空隙９の効果についても、空隙９
と弁本体１との間にはシール作用がなく、従つて
密封作用が期待できないので、空隙９は可撓性に
は何の効果も与えず、この空隙９は、補強部材６
の逃げを吸収する役目しかもちえない。 Furthermore, regarding the effect of the void 9,
Since there is no sealing effect between the reinforcing member 6 and the valve body 1, and therefore no sealing effect can be expected, the gap 9 has no effect on flexibility.
It can only serve the role of absorbing the escape of people.
以上述べた理由により、上記した従来例のシー
トリングの補強部材６は、フランジ当り面には剛
性が必要なため厚くならざるを得ず、他方、弁体
喰い込み部は可撓性が必要なため薄くならざるを
得ず、また一般に、同一材料のプレス工程では、
縁（ふち）の方が薄くなる現実からすると、実現
が困難な問題点を有していた。 For the reasons stated above, the reinforcing member 6 of the conventional seat ring described above has to be thick because the flange abutting surface needs to have rigidity, and on the other hand, the part where the valve body bites needs to be flexible. Therefore, it has to be thinner, and generally speaking, in the pressing process of the same material,
Given the reality that the edges become thinner, this poses a problem that is difficult to implement.
本考案は、補強部材に剛性と可撓性を与え、補
強部材と一体成形したゴム状弾性体により、補強
部材内部に空隙を設けてその可撓性を補助するこ
とを技術的課題としている。 The technical problem of the present invention is to provide rigidity and flexibility to a reinforcing member, and to provide a void inside the reinforcing member using a rubber-like elastic body integrally molded with the reinforcing member to assist the flexibility.
（問題点を解決するための手段）
本考案は、上記した問題点及び技術的課題を解
決するために、
(イ) １対の弁軸穴用環状の外縁と円筒部の両外縁
とを具えた環状補強部材１６と、
(ロ) 該環状補強部材の各外縁とそれぞれ嵌まり込
む各内縁を具えた１対の半環状補強部材１７，
１７を、前記環状補強部材１６の外方上下両側
から嵌め込み、
(ハ) 上記半環状補強部材１７，１７の各内縁を環
状補強部材１６の各外縁にそれぞれ接合して、
内部に空隙１９を有した補強部材１８を構成
し、
(ニ) 該補強部材１８とゴム状弾性体とを一体成形
して所望のシートリングを構成したことを特徴
としている。(Means for Solving the Problems) In order to solve the above-mentioned problems and technical problems, the present invention has the following features: (a) A pair of annular outer edges for a valve shaft hole and both outer edges of a cylindrical portion. (b) a pair of semi-annular reinforcing members 17 having respective inner edges that fit into respective outer edges of the annular reinforcing members;
17 from the outer upper and lower sides of the annular reinforcing member 16, (c) each inner edge of the semi-annular reinforcing member 17, 17 is joined to each outer edge of the annular reinforcing member 16,
The reinforcing member 18 has a void 19 inside, and (d) the reinforcing member 18 and a rubber-like elastic body are integrally molded to form a desired seat ring.
（作用）
本考案は、上記のように構成されているので次
のように作用する。(Function) Since the present invention is configured as described above, it functions as follows.
該バタフライ弁がパイプのフランジに両側から
挾着されて配管された場合、
(i) シートリングのフランジ当り面には、補強部
材１８が二重構造を有しており、従来例のよう
な一重のものより剛性を発揮する。しかも、補
強部材１８は、ゴム状弾性体で覆われており、
該補強部材の空隙１９には空気が密閉され、エ
アスプリング効果をも発揮してフランジ面のシ
ール性をより確実なものとし、
(ii) 弁体喰い込み部のシール性には、ゴム状弾性
体自身の反撥力と、補強部材１８の金属スプリ
ング効果と、補強部材内の空隙に密閉された空
気のエアスプリング効果とが相俟つて常にゴム
状弾性体には適正な圧縮のみを保持する自動調
節作用により、ゴム状弾性体の応力を軽減し、
寿命の延長をもたらす作用を有する。また、該
空隙部は、ゴム状弾性体で包囲されているの
で、該部からの洩れはない。 When the butterfly valve is attached to the flange of the pipe from both sides and installed in the pipe, (i) the reinforcing member 18 has a double structure on the flange contact surface of the seat ring, unlike the conventional example where the reinforcing member 18 has a double structure; Demonstrates more rigidity than that of Moreover, the reinforcing member 18 is covered with a rubber-like elastic body,
The void 19 of the reinforcing member is sealed with air, which also exerts an air spring effect to ensure more reliable sealing of the flange surface. The body's own repulsive force, the metal spring effect of the reinforcing member 18, and the air spring effect of the air sealed in the void within the reinforcing member combine to create an automatic mechanism that always maintains only the appropriate compression in the rubber-like elastic body. The adjustment action reduces stress on the rubber-like elastic body,
It has the effect of extending lifespan. Further, since the gap is surrounded by a rubber-like elastic body, there is no leakage from the gap.
(iii) 更に、弁軸穴の周りにも二重構造の補強部材
がバツクアツプしているので、弁閉止時の差圧
によつて弁体が一次側から二次側に押圧されて
も、弁軸保持部は剛性を有し、グランド部への
漏洩をも防止する作用を有する。(iii) Furthermore, since the double-layered reinforcing member is backed up around the valve stem hole, even if the valve body is pressed from the primary side to the secondary side due to the differential pressure when the valve is closed, the valve will remain intact. The shaft holding part has rigidity and also has the function of preventing leakage to the ground part.
（実施例） 次に、本考案の実施例を図面と共に説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本考案の一実施例を示すシートリング
を装着したバタフライ弁の組立断面図、第２図は
第１図の−線によるシートリング部の断面
図、第３図は第２図の−線による、また第４
図は第２図の−線による各断面図、第５図は
第４図の拡大断面図である。図において、中空筒
状の弁本体１１の内周面に、１対の弁軸穴１５を
有し、内部に補強部材を埋め込んだシートリング
１４を装着し、弁閉鎖時は、弁軸１２に支持され
た弁体１３の周縁部を該シートリング１４の内面
に押しつけるようにして密着させていることは、
従来のもの（第７図）と変りはないが、本実施例
では、上記補強部材は次のように構成されてい
る。 Fig. 1 is an assembled cross-sectional view of a butterfly valve equipped with a seat ring showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the seat ring section taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view of the seat ring section shown in Fig. 2. - by line, also by the fourth
The figures are sectional views taken along the - line in FIG. 2, and FIG. 5 is an enlarged sectional view of FIG. 4. In the figure, a seat ring 14 having a pair of valve stem holes 15 and a reinforcing member embedded inside is attached to the inner peripheral surface of a hollow cylindrical valve body 11, and when the valve is closed, the seat ring 14 is attached to the valve stem 12. The fact that the peripheral edge of the supported valve body 13 is pressed against the inner surface of the seat ring 14 is that
Although there is no difference from the conventional one (FIG. 7), in this embodiment, the above-mentioned reinforcing member is constructed as follows.
第６Ａ及び第６Ｂ図の説明図に示すように、１
対の弁軸穴に沿つて半径方向外方へ向かう環状外
縁１６ａ，１６ａと、円筒部の両端面に半径方向
外方へ向かう各外縁１６ｂ，１６ｂとを一体に形
成した環状補強部材１６の外側に対向して、上記
各外縁１６ａ，１６ａ，１７ａ，１７ａにそれぞ
れ嵌まり込むような、弁軸穴用の半径方向内方へ
向かう環状内縁１７ａと、円筒部の両端面に半径
方向内方に向かう各内縁１７ｂ，１７ｂとを一体
に形成した１対の半環状補強部材１７，１７を、
外側から嵌め込んで、各外縁と内縁とをそれぞれ
接合した補強部材１８を構成している。そして該
補強部材１８はゴム性弾性体に埋設するように一
体成形され、上記嵌め込まれた両環状補強部材１
６と１７に囲まれた部分に空隙１９が形成されて
いる。 As shown in the explanatory diagrams of FIGS. 6A and 6B, 1
The outside of the annular reinforcing member 16, which is integrally formed with annular outer edges 16a, 16a extending radially outward along the pair of valve stem holes, and outer edges 16b, 16b extending radially outward on both end faces of the cylindrical portion. An annular inner edge 17a facing radially inward for the valve shaft hole and fitting into each of the outer edges 16a, 16a, 17a, 17a, respectively, and an annular inner edge 17a facing radially inward on both end surfaces of the cylindrical portion. A pair of semi-annular reinforcing members 17, 17 integrally formed with inner edges 17b, 17b facing each other,
A reinforcing member 18 is formed by fitting from the outside and joining each outer edge and inner edge. The reinforcing member 18 is integrally molded so as to be embedded in the rubber elastic body, and both annular reinforcing members 1 are fitted into the rubber elastic body.
A gap 19 is formed in a portion surrounded by 6 and 17.
上記のように構成されているので、シートリン
グ１４の両側端面即ちフランジ当り面において
は、内部に埋設された補強部材１８が、環状補強
部材１６の外縁１６ｂと半環状補強部材１７の内
縁１７ｂを接合した二重構造となつており、一重
にした従来のもの（第７図）より剛性を発揮し、
しかも補強部材１８はゴム状弾性体で覆われてお
り、また空隙１９には空気が密閉されエアスプリ
ング効果を発揮してフランジ面のシール性をより
確実なものとし、また、弁体喰い込み部のシール
性には、ゴム状弾性体自身の反撥力と、補強部材
１８の金属スプリング効果と、補強部材１８内の
空隙１９内に密閉された空気の（第１図の圧力ｐ
による）エアスプリング効果とが相俟つて、常に
ゴム状弾性体には適正な圧縮のみを保持する自動
調節作用により、ゴム状弾性体の応力を軽減し、
寿命を延長することができる。 With the above structure, on both end surfaces of the seat ring 14, that is, on the flange abutting surfaces, the reinforcing member 18 embedded inside the outer edge 16b of the annular reinforcing member 16 and the inner edge 17b of the semi-annular reinforcing member 17. It has a joined double structure, which is more rigid than the conventional single layer structure (Fig. 7).
In addition, the reinforcing member 18 is covered with a rubber-like elastic material, and the gap 19 is sealed with air to exhibit an air spring effect, thereby making the sealing performance of the flange surface more reliable. The sealing performance is due to the repulsive force of the rubber-like elastic body itself, the metal spring effect of the reinforcing member 18, and the pressure of the air sealed in the void 19 in the reinforcing member 18 (the pressure
Coupled with the air spring effect (according to
Lifespan can be extended.
さらに、弁軸穴１５部においても、環状補強部
材１６の弁軸穴用環状外縁１６ａと、半環状補強
部材１７の弁軸穴用環状内縁１７ａとにより二重
構造となつているので、弁閉止時の差圧によつて
弁板が一次側から二次側に押圧されても、弁軸保
持部は剛性を有し、グランド部への漏洩が防止で
きる。 Furthermore, since the valve stem hole 15 portion also has a double structure with the annular outer edge 16a for the valve stem hole of the annular reinforcing member 16 and the annular inner edge 17a for the valve stem hole of the semi-annular reinforcing member 17, the valve can be closed. Even if the valve plate is pressed from the primary side to the secondary side due to the differential pressure at the time, the valve stem holding part has rigidity and can prevent leakage to the gland part.
（考案の効果）
以上説明したように、本考案によれば、補強部
材を、弁軸穴部と両端面に外縁を形成した環状補
強部材と、各外縁にそれぞれ接合する内縁を形成
した１対の半環状補強部材とを、内部に空隙を形
成するように嵌め合わせて一体に構成し、これと
ゴム状弾性体とを一体成形しているので、次のよ
うな効果が奏される。(Effects of the invention) As explained above, according to the invention, the reinforcing member is made of a pair of annular reinforcing members, each having an annular reinforcing member having an outer edge formed at the valve stem hole and both end faces, and an inner edge joining each outer edge. Since the semi-annular reinforcing member and the semi-annular reinforcing member are fitted together so as to form a gap therein, and the rubber-like elastic body is integrally molded, the following effects are achieved.
(i) フランジ部の剛性を高めて該部のシール性能
を向上させる。(i) Increasing the rigidity of the flange part to improve the sealing performance of the part.
(ii) ゴム状弾性体、補強部材、空隙の各スプリン
グ効果によるゴム状弾性体の圧縮量の自動押圧
調節効果によりゴム状弾性体の寿命を向上さ
せ、また空隙部は弾性体によつて包囲されてい
るので該部からの洩れはない。(ii) The life of the rubber-like elastic body is improved by the automatic pressure adjustment effect of the amount of compression of the rubber-like elastic body due to the spring effect of the rubber-like elastic body, the reinforcing member, and the void, and the void is surrounded by the elastic body. There is no leakage from this part.
(iii) 弁軸部が常に真円に保たれるので、弁前後の
高差圧によつて弁体が流体に押圧されてもグラ
ンド部への漏洩を防止する。(iii) Since the valve stem is always kept perfectly circular, even if the valve body is pressed by fluid due to a high differential pressure across the valve, leakage to the gland is prevented.
(iv) 真空、噴流等過酷な条件でもゴム状弾性体が
引き込まれたり、はがれたりしない高性能なシ
ートリングとしての効果を発揮する。(iv) The rubber-like elastic body will not be pulled in or peeled off even under harsh conditions such as vacuum and jet flow, making it effective as a high-performance seat ring.
第１図は、本考案の一実施例を示すシートリン
グを装着したバタフライ弁の組立断面図、第２図
は第１図の−線によるシートリング部の断面
図、第３図は第２図の−線による断面図、第
４図は第２図の−線による断面図、第５図は
第４図Ａ部の拡大断面図、第６Ａ図及び第６Ｂ図
は補強部材の要部説明図、第７図は従来のバタフ
ライ弁の要部断面図、第８図は弁の性能に関する
比較線図である。
１１……弁本体、１２……弁板、１３……弁
軸、１４……シートリング、１５……弁軸穴、１
６……環状補強部材、１６ａ，１６ｂ……外縁、
１７……半環状補強部材、１７ａ，１７ｂ……内
縁。
Fig. 1 is an assembled sectional view of a butterfly valve equipped with a seat ring showing an embodiment of the present invention, Fig. 2 is a sectional view of the seat ring portion taken along the - line in Fig. 1, and Fig. 3 is a sectional view of the seat ring section shown in Fig. 2. 4 is a sectional view taken along the - line in FIG. 2, FIG. 5 is an enlarged sectional view of section A in FIG. 4, and FIGS. 6A and 6B are explanatory views of the main parts of the reinforcing member. , FIG. 7 is a sectional view of a main part of a conventional butterfly valve, and FIG. 8 is a comparison chart regarding the performance of the valve. 11... Valve body, 12... Valve plate, 13... Valve stem, 14... Seat ring, 15... Valve stem hole, 1
6... Annular reinforcing member, 16a, 16b... Outer edge,
17... Semi-annular reinforcing member, 17a, 17b... Inner edge.
Claims (1)
の弁軸穴を有しゴム状弾性体からなる環状のシー
トリングを介在させたバタフライ弁のシートリン
グにおいて、１対の弁軸穴に沿つて半径方向外方
へ向かう環状外縁１６ａ，１６ａと円筒部の両端
面に半径方向外方へ向かう各外縁１６ｂ，１６ｂ
とを一体に形成した環状補強部材１６の外側に対
向して、上記各外縁にそれぞれ嵌まり込むよう
な、弁軸穴用の半径方向内方へ向かう環状内縁１
７ａと円筒部の両端面に半径方向内方に向かう各
内縁１７ｂ，１７ｂとを一体に形成した１対の半
環状補強部材１７，１７を、嵌め込んで上記各外
縁と内縁とをそれぞれ接合した補強部材１８を構
成し、該補強部材１８とゴム状弾性体とを一体成
形し、前記嵌め込まれた両環状補強部材１６，１
７に囲まれた部分に空隙１９を形成したことを特
徴とするバタフライ弁のシートリング。 In the seat ring of a butterfly valve, an annular seat ring made of a rubber-like elastic body and having a pair of valve stem holes is interposed between the inner peripheral surface of the valve body and the peripheral edge of the valve plate. Annular outer edges 16a, 16a extending radially outward along the valve stem hole, and outer edges 16b, 16b extending radially outward on both end surfaces of the cylindrical portion.
An annular inner edge 1 facing radially inward for a valve stem hole, facing the outside of an annular reinforcing member 16 integrally formed with the above, and fitting into each of the outer edges, respectively.
A pair of semi-annular reinforcing members 17, 17, which are integrally formed with inner edges 17b, 17b facing radially inward on both end faces of the cylindrical portion, are fitted to join the outer edges and inner edges, respectively. A reinforcing member 18 is formed, the reinforcing member 18 and a rubber-like elastic body are integrally molded, and the fitted annular reinforcing members 16, 1
A seat ring for a butterfly valve, characterized in that a gap 19 is formed in a portion surrounded by 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3467885U JPH0128389Y2 (en) | 1985-03-13 | 1985-03-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3467885U JPH0128389Y2 (en) | 1985-03-13 | 1985-03-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61152851U JPS61152851U (en) | 1986-09-22 |
| JPH0128389Y2 true JPH0128389Y2 (en) | 1989-08-29 |
Family
ID=30538274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3467885U Expired JPH0128389Y2 (en) | 1985-03-13 | 1985-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0128389Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001327622A (en) * | 2000-05-23 | 2001-11-27 | Senju Sprinkler Kk | Simultaneous opening valve |
| JP7190765B1 (en) * | 2021-08-18 | 2022-12-16 | 新倉工業株式会社 | butterfly valve |
-
1985
- 1985-03-13 JP JP3467885U patent/JPH0128389Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001327622A (en) * | 2000-05-23 | 2001-11-27 | Senju Sprinkler Kk | Simultaneous opening valve |
| JP7190765B1 (en) * | 2021-08-18 | 2022-12-16 | 新倉工業株式会社 | butterfly valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61152851U (en) | 1986-09-22 |
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