JPH0457911B2 - - Google Patents
Info
- Publication number
- JPH0457911B2 JPH0457911B2 JP12840287A JP12840287A JPH0457911B2 JP H0457911 B2 JPH0457911 B2 JP H0457911B2 JP 12840287 A JP12840287 A JP 12840287A JP 12840287 A JP12840287 A JP 12840287A JP H0457911 B2 JPH0457911 B2 JP H0457911B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- valve stem
- main body
- convex portion
- 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
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229910001347 Stellite Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Lift Valve (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、弁体の裏側に設けられた弁棒接続用
ハブ部に弁棒を取付けて弁体を偏芯回転できるよ
うに本体内に支持するようにした偏芯型バタフラ
イ弁の、特に弁体全閉位置ストツパ機構に関し、
バタフライ弁で閉止を必要とする液体、気体等の
流体を扱う流路に広く用いられる。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a valve stem that is attached to a valve stem connection hub provided on the back side of the valve body so that the valve body can be eccentrically rotated. Regarding the fully closed valve body stopper mechanism of the supported eccentric butterfly valve,
Widely used in channels that handle fluids such as liquids and gases that require closure with a butterfly valve.
従来のこの種の偏芯型バタフライ弁では、弁体
開閉時の全閉位置は、次に例示するような全閉位
置ストツパ機構により位置決めされるようになつ
ている。
In conventional eccentric butterfly valves of this type, the fully closed position when the valve body is opened and closed is determined by a fully closed position stopper mechanism as exemplified below.
第５図は、ストツパ機構を備えた全閉時におけ
る偏芯型バタフライ弁の要部断面図であつて、本
体１の内面にシートリングリテーナ（押え金物）
２を介して取付けられたシートリング３によつ
て、弁棒４に弁棒接続ハブ部５ａを介して支持さ
れた弁体５の周面部がシールされ、且つ該弁体５
の弁棒反対側つまり表面の外周部に突設されたス
トツパ凸部６が、シートリングリテーナ２に形成
された段部２ａに当接するように構成されてお
り、全閉時において弁体５の閉鎖位置を規制して
いる。 FIG. 5 is a sectional view of essential parts of an eccentric butterfly valve when fully closed and equipped with a stopper mechanism.
The peripheral surface of the valve body 5 supported by the valve stem 4 via the valve stem connection hub part 5a is sealed by the seat ring 3 attached via the valve body 5.
A stopper convex portion 6 protruding from the opposite side of the valve stem, that is, the outer periphery of the surface, is configured to abut against a stepped portion 2a formed on the seat ring retainer 2, and when the valve body 5 is fully closed, The closed position is regulated.
第６図Ａ，Ｂは、他のストツパ機構を備えた全
閉時における偏芯型バタフライ弁の要部断面図と
底面図であつて、全閉時、シートリング３に周面
部をシールされている弁体（弁板部）５の背面つ
まり弁棒側の面を、本体１内面の一部に突設され
たストツパ用突起７に当接させてストツパ機能を
持せるようになつている。なお、上記弁体５の背
面の当接面５ｂは通常鋳肌のままとなつている。 FIGS. 6A and 6B are a sectional view and a bottom view of essential parts of an eccentric butterfly valve equipped with another stopper mechanism when fully closed; The back surface of the valve body (valve plate portion) 5, that is, the surface on the valve stem side, is brought into contact with a stopper projection 7 protruding from a part of the inner surface of the main body 1, so that it can have a stopper function. Note that the contact surface 5b on the back surface of the valve body 5 is normally left as a cast surface.
第７図Ａ，Ｂは、更に他のストツパ機構を備え
た全閉時における偏芯型バタフライ弁の要部断面
図と底面図であつて、全閉時、シートリング３に
周面部をシールされている弁体５の表面つまり弁
棒の反対側の面を、シートリングリテーナ２の内
面の一部を同図Ｂに示すように内径方向に突出さ
せた突出部分８の背面に当接させて、ストツパ機
能を持たせるようになつている。 FIGS. 7A and 7B are a sectional view and a bottom view of main parts of an eccentric butterfly valve when fully closed, which is equipped with another stopper mechanism, and shows that when fully closed, the peripheral surface is sealed by the seat ring 3. The surface of the valve body 5, that is, the surface on the opposite side of the valve stem, is brought into contact with the back surface of the protruding portion 8, which is a part of the inner surface of the seat ring retainer 2 that protrudes in the inner radial direction as shown in FIG. , has come to have a stopper function.
上記した従来例において、第５図に示されたも
のでは、ストツパとなる当接面は、弁体側ストツ
パ凸部６とシートリングリテーナ２の段部２ａと
が共に加工されるため、弁全閉位置は確実に決め
られる。しかしながら、弁体５の弁棒反対側の表
面にストツパ凸部６が突出しているため、面間寸
法が必要以上に大きくなり、本体１等の重量増に
つながる。又、弁体５外周面のシートリング３と
のエツジ着座面においてステライト盛り等の硬化
処理を行なつた場合、表面研磨が困難となる。加
えて、弁体４がフリーの状態にある場合、弁が矢
印方向の開方向へ作動し過ぎた場合、上記ストツ
パ凸部６によつて対向側のシート等の損傷につな
がる恐れがあるという問題点があつた。
In the conventional example described above, in the one shown in FIG. 5, the contact surface that becomes the stopper is machined together with the valve body side stopper convex portion 6 and the stepped portion 2a of the seat ring retainer 2, so that the valve is fully closed. The location can be determined with certainty. However, since the stopper convex portion 6 protrudes from the surface of the valve body 5 opposite to the valve stem, the face-to-face dimension becomes larger than necessary, leading to an increase in the weight of the main body 1 and the like. Furthermore, if hardening treatment such as stellite coating is performed on the edge seating surface of the outer peripheral surface of the valve body 5 with the seat ring 3, surface polishing becomes difficult. In addition, when the valve body 4 is in a free state, if the valve operates too much in the opening direction shown by the arrow, there is a problem that the stopper protrusion 6 may cause damage to the seat on the opposite side, etc. The dot was hot.
また第６図Ａ，Ｂに示されたストツパ機構を備
えたものでは、弁体５及びストツパ用突起７の当
接平面は、通常鋳肌のままのものが多く、弁閉止
位置が正しく定まらない。又、加工を行なおうと
しても、弁体裏側はハブ部５ａがあるため旋削加
工が行えず、平面研削となり、通常フライス盤等
での加工となり、機械の段取り替えが必要とな
り、加工工数が増える。又、突起７が流路に対し
て障害物となり、Cv値の低下につながるばかり
でなく、微小弁開度時において、噴流による速度
エネルギ（１／2mv2）によつて、該突起７にエ
ロージヨンやコロージヨン等が発生し易く、この
ため、全閉位置に狂いが生じることがあり、その
ため、弁のコントロール制御には不向きであると
いう問題点があつた。 In addition, in the devices equipped with the stopper mechanism shown in FIGS. 6A and 6B, the contact plane between the valve body 5 and the stopper protrusion 7 is usually left as a cast surface, and the valve closing position cannot be determined correctly. . Furthermore, even if machining is attempted, turning cannot be performed on the back side of the valve body due to the presence of the hub portion 5a, and instead surface grinding is required, which typically requires machining with a milling machine, etc., which requires a change in machine setup and increases the number of machining steps. . In addition, the protrusion 7 becomes an obstacle to the flow path, which not only leads to a decrease in the Cv value, but also causes the protrusion 7 to Erosion, corrosion, etc. are likely to occur, and as a result, the fully closed position may be deviated from, making it unsuitable for valve control.
更に第７図Ａ，Ｂに示されたストツパ機構を備
えたものでは、弁体５及びシートリングリテーナ
２は容易に加工できる。しかしながら、第６図の
場合と同様に、シートリング突出部８は流路の障
害となるため、Cv値の低下及びエロージヨン、
コロージヨン等による損傷が生じ易く、全閉位置
に狂いが生じ易く、長期に亙つて保障できない。
又、第５図の場合と同様に、弁開放時に開側オー
バーラン防止ストツパがないため、弁の回り過ぎ
による弁体シール面の損傷等を生じさせる恐れが
あるという問題点があつた。 Furthermore, in the case of the stopper mechanism shown in FIGS. 7A and 7B, the valve body 5 and the seat ring retainer 2 can be easily machined. However, as in the case of FIG. 6, the seat ring protrusion 8 becomes an obstacle to the flow path, resulting in a decrease in the Cv value and erosion.
It is prone to damage due to corrosion, etc., and the fully closed position is likely to be incorrect, and cannot be guaranteed over a long period of time.
Further, as in the case of FIG. 5, there is a problem in that when the valve is opened, there is no overrun prevention stopper on the open side, so there is a risk of damage to the sealing surface of the valve body due to excessive rotation of the valve.
本発明は、流路内に障害物となる突起を設け
ず、しかも、本体と弁体の両者において１チヤツ
キング加工を行なうことができ、加工工程が２工
程以上要しない全閉位置ストツパ機構を備えた偏
芯型バタフライ弁を提供することを技術的課題と
している。 The present invention is equipped with a fully closed position stopper mechanism that does not provide any protrusions that become obstacles in the flow path, and can perform one chucking process on both the main body and the valve body, and does not require two or more machining steps. Our technical challenge is to provide an eccentric butterfly valve that has a unique structure.
本発明は、上記した従来技術の問題点及び技術
的課題を解決するために、偏芯型バタフライ弁の
弁体ハブ部外端面の弁棒穴周縁の弁体と対向する
位置に、弁体と平行をなす弁棒穴中心線を含む平
面上に平面部を有する凸部を形成すると共に、本
体内面の弁棒貫通穴周縁の弁体側に、上記平面部
と当接関係にある平面部を有する凸部を設け、両
平面部を当接させることによつて、弁閉止位置の
位置決めを行なうと同時に、弁体を加圧すること
によつて生じる不均合いトルクによる弁体のオー
バーランを防止するようにしたことを特徴として
いる。
In order to solve the problems and technical problems of the prior art described above, the present invention has provided a valve body at a position facing the valve body at the periphery of the valve stem hole on the outer end surface of the valve body hub of an eccentric butterfly valve. A convex portion having a flat portion is formed on a plane including parallel valve stem hole center lines, and a flat portion is in contact with the flat portion on the valve body side of the periphery of the valve stem through hole on the inner surface of the main body. By providing a convex part and bringing both flat parts into contact, the valve closing position is determined and, at the same time, the valve body is prevented from overrunning due to unbalanced torque caused by pressurizing the valve body. It is characterized by the fact that
本発明は上記のように構成されているので、弁
閉時、弁体は、弁棒接続用ハブ部外端面が、本体
内面の弁棒貫通穴周縁に形成された本体側の弁体
支持部によつて支持されて回動し、弁体の全閉位
置において、上記ハブ部外端面の弁棒穴周縁の弁
体と対向する位置に形成された凸部の平面部が、
本体内面の弁体支持部に形成された凸部の平面部
に当接する。
Since the present invention is configured as described above, when the valve is closed, the outer end surface of the valve stem connection hub part is connected to the valve body support part on the main body side, which is formed around the periphery of the valve stem through hole on the inner surface of the main body. When the valve body is in a fully closed position, the flat portion of the convex portion formed at a position facing the valve body on the periphery of the valve stem hole on the outer end surface of the hub portion,
It comes into contact with the flat part of the convex part formed on the valve body support part on the inner surface of the main body.
このようにして、弁体の全閉位置が位置決めさ
れると同時に、弁体を加圧することによつて生じ
る不均合いトルクによる弁体のオーバーランが防
止される。 In this way, the fully closed position of the valve body is determined, and at the same time, overrun of the valve body due to unbalanced torque caused by pressurizing the valve body is prevented.
次に、本発明の実施例を図面と共に説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明の一実施例を示す偏芯型バタ
フライ弁の弁体を分離して示した斜視図である。 FIG. 1 is a perspective view showing a separated valve body of an eccentric butterfly valve showing one embodiment of the present invention.
図において、本体１１の内面１１ａの弁棒穴１
２ａの周縁の一部を囲繞して、凸部１３が設けら
れている。該凸部１３は、本体１１の弁棒穴１２
ａ近傍を拡大して示す第２図（第１図における本
体１１の右側方から見ているので、第１図とは向
きが逆になつている。）のように、弁棒穴１２ａ
の中心１２ｃとシートリング装着面１１ｂ間にお
いて、弁棒穴周縁部を所定高さ（半径方向の厚
み）を保つて約90°囲繞するようにして設けられ
ており、該凸部１３の内端面（半径方向内方を向
いた面）は凹形の球面部１３ａとして形成されて
おり、且つ該凸部１３の端面には、平面部１３ｂ
が形成されている。 In the figure, the valve stem hole 1 on the inner surface 11a of the main body 11
A protrusion 13 is provided surrounding a part of the periphery of 2a. The convex portion 13 is connected to the valve stem hole 12 of the main body 11.
As shown in FIG. 2 which shows an enlarged view of the vicinity of the valve stem hole 12a (as seen from the right side of the main body 11 in FIG. 1, the direction is reversed from that in FIG. 1).
The inner end surface of the convex portion 13 is provided so as to surround the peripheral edge of the valve stem hole at a predetermined height (radial direction thickness) between the center 12c and the seat ring mounting surface 11b. (the surface facing inward in the radial direction) is formed as a concave spherical portion 13a, and the end surface of the convex portion 13 has a flat portion 13b.
is formed.
一方、本体内面１１ａに装着される弁体１５の
裏側に設けられた弁棒接続用ハブ部１６（通常、
弁棒に対応して図の上下方向２個所に設けられる
が、第１図では上方部のみ示されている。）は、
該ハブ部１６を拡大して示す第３図のように、弁
体（弁板部）１５に接する外端面（半径方向外方
を向いた面）が、ほぼ半円周に亙つて凸形の球面
部１６ａとして形成されており、該球面部１６ａ
は、上記本体内面１１ａの弁棒穴周縁の凸部１３
の凹形球面部１３ａの球半径とほぼ同じ球半径を
有しており、これら両球面１３ａと１６ａを対向
して摺動させることによつて弁体１５の芯出し機
能が得られるようになつている。 On the other hand, a valve stem connection hub portion 16 (usually,
Although they are provided at two locations in the vertical direction of the drawing corresponding to the valve stem, only the upper portion is shown in FIG. )teeth,
As shown in FIG. 3, which shows an enlarged view of the hub portion 16, the outer end surface (the surface facing outward in the radial direction) in contact with the valve body (valve plate portion) 15 has a convex shape over approximately a semicircumference. It is formed as a spherical part 16a, and the spherical part 16a
is a convex portion 13 on the periphery of the valve stem hole on the inner surface 11a of the main body.
The centering function of the valve body 15 can be obtained by sliding these two spherical surfaces 13a and 16a facing each other. ing.
更に、弁体ハブ部１６の外端面（図で上面）に
は、上記凸形の球面部１６ａの一端（図で左側
端）に接続する形で、図示しない弁体１５と対向
する位置つまり弁体と向い合つている位置に、θ
角（約90°）の角度範囲に亙つて凸部１７が一体
に形成されている。該凸部１７と上記凸形球面部
１６ａとが接続する一端には、平面部１７ａが形
成され、該平面部１７ａは、弁体１５と平行をな
し従つて全閉時流路と直交する、弁棒穴１２ｂの
中心線１２ｃを含む平面上に位置されている。ま
た該凸部１７の他端部には、平面部１７ｂが形成
されている。 Further, on the outer end surface (upper surface in the figure) of the valve body hub portion 16, there is a position facing the valve body 15 (not shown), that is, a valve connected to one end (left end in the figure) of the convex spherical surface portion 16a. θ in the position facing the body
The convex portion 17 is integrally formed over an angular range of about 90°. A flat part 17a is formed at one end where the convex part 17 and the convex spherical part 16a connect, and the flat part 17a is parallel to the valve body 15 and is perpendicular to the flow path when fully closed. It is located on a plane including the centerline 12c of the rod hole 12b. Further, at the other end of the convex portion 17, a flat portion 17b is formed.
第４図は、上記のようにして本体内面１１ａに
装着された弁体１５全閉状態にあるときの状態を
示す要部断面図であつて、第１図−線を含む
垂直平面で切断した本体１１と弁体１５の部分
を、矢印Ａ方向より見た下半分を示す側断面図で
ある。 FIG. 4 is a cross-sectional view of the main part showing the fully closed state of the valve body 15 attached to the inner surface 11a of the main body as described above, taken along a vertical plane including the line in FIG. FIG. 3 is a side sectional view showing the lower half of the main body 11 and the valve body 15 when viewed from the direction of arrow A. FIG.
図において、１８は、シートリングリテーナ１
９によつて本体１１のシートリング装着面１１ｂ
に装着されたシートリングであつて、該シートリ
ング１８は環状に形成された金属製のコイルばね
１８ａを薄板で内包し、断面がほぼＪ型で、弁体
１５との着座部において該コイルばね１８ａによ
つて弾性を付与されたものであり、該シートリン
グ１８を、本体１１とシートリングリテーナ１９
との間に配し、弁体１５の周面と圧接関係を保持
することによつて流体のシール作用が行われてい
る。 In the figure, 18 is the seat ring retainer 1
9 to the seat ring mounting surface 11b of the main body 11
The seat ring 18 is a thin plate that encloses a metal coil spring 18a formed in an annular shape, and has a substantially J-shaped cross section, and the coil spring 18a imparts elasticity, and the seat ring 18 is connected to the main body 11 and the seat ring retainer 19.
A fluid sealing action is performed by maintaining a pressure contact relationship with the circumferential surface of the valve body 15.
一方、弁体１５は、ハブ部１６の弁棒穴周縁の
外端面（図で下面）に形成された凸形球面部１６
ａを、本体内面１１ａの弁棒穴１２ａ周縁に形成
された凸部１３の凹形球面部１３ａに支持されて
おり、且つ上記弁体ハブ部１６の外端面に形成さ
れた凸部１７の平面部１７ａを、上記本体内面１
１ａに形成された凸部１３の平面部１３ｂに当接
させて、弁閉鎖位置を位置決めしている。 On the other hand, the valve body 15 has a convex spherical surface portion 16 formed on the outer end surface (lower surface in the figure) of the periphery of the valve stem hole of the hub portion 16.
a is a plane of a convex portion 17 that is supported by a concave spherical surface portion 13a of a convex portion 13 formed at the periphery of the valve stem hole 12a of the inner surface 11a of the main body and formed on the outer end surface of the valve body hub portion 16. The portion 17a is attached to the inner surface of the main body 1.
The valve closing position is determined by abutting against the flat portion 13b of the convex portion 13 formed on the portion 1a.
他方、弁体１５の開弁時、全閉位置から約90°
回動した全開状態において、弁体ハブ部１６の外
端面凸部１７の他端平面部１７ｂが、本体内面１
１ａに形成された球面凸部１３の立上げスロープ
部１３ｃ（第２図）に当接するようになつており、
従つてオーバーランすることがない。なお、図
中、１２は弁棒、２０はシートリングリテーナ１
９の本体１１に固定するねじ（セツトスクリユ
ー）、２１は軸受ブツシユ、Ｂは弁の中心軸線で
ある。 On the other hand, when the valve body 15 is opened, it is approximately 90° from the fully closed position.
In the rotated and fully open state, the other end flat portion 17b of the outer end surface convex portion 17 of the valve body hub portion 16 is
It comes into contact with the rising slope part 13c (FIG. 2) of the spherical convex part 13 formed in 1a,
Therefore, there is no possibility of overrun. In addition, in the figure, 12 is a valve stem, and 20 is a seat ring retainer 1.
9 is a screw (set screw) fixed to the main body 11, 21 is a bearing bush, and B is the center axis of the valve.
この実施例によれば、弁体１５が本体１１の内
面１１ａに装着された状態において、該弁体１５
は、裏面の上下２個所に設けられた弁棒接続用ハ
ブ部１６の凸形球面部１６ａが、該球面の球半径
とほぼ同等の球半径を有する本体内面の凸部１３
の凹形球面部１３ａに摺動支持されるようになつ
ているので、弁体１１は本体内面１１ａに対する
調芯作用を行ないながら本体内で自由に回動する
ことができる。従つて、たとえ、弁棒１２と弁棒
穴１２ａ，１２ｂ等において多少の加工誤差があ
つても、上記のような両球面部１３ａ，１６ａに
よる調芯作用によつて自動的に調芯され、弁体１
５の周面とシートリング１８とのシール状態が保
持される。 According to this embodiment, when the valve body 15 is attached to the inner surface 11a of the main body 11, the valve body 15
The convex spherical surface portions 16a of the valve stem connection hub portion 16 provided at two locations above and below on the back surface have a spherical radius approximately equal to the spherical radius of the convex portion 13 on the inner surface of the main body.
Since the valve body 11 is slidably supported by the concave spherical surface portion 13a of the valve body 11, the valve body 11 can freely rotate within the body while performing an alignment action with respect to the inner surface 11a of the body. Therefore, even if there is some machining error in the valve stem 12 and the valve stem holes 12a, 12b, etc., the alignment will be automatically achieved by the alignment action of the two spherical parts 13a, 16a as described above. Valve body 1
5 and the seat ring 18 are maintained in a sealed state.
また、両球面部１３ａ，１６ａは、弁棒穴周縁
部の一部に設けられた凸部１３とハブ部の球面部
とのみに形成されているので、加工が容易であ
る。 Moreover, since both spherical parts 13a and 16a are formed only on the convex part 13 provided on a part of the peripheral edge of the valve stem hole and the spherical part of the hub part, machining is easy.
他方、弁体ハブ部１６と本体内面１１ａの弁棒
穴周縁部の両摺動面が互いに遊合する球面で形成
されているので、弁体周面と本体内面１１ａのシ
ートリング装着面１１ｂとを円周部加工する際、
一度のチヤツキング操作で加工することができ
る。なお、このとき、摺動部の両球面加工は、通
常NC旋盤でなされる。 On the other hand, since both the sliding surfaces of the valve body hub portion 16 and the peripheral edge of the valve stem hole of the inner surface 11a of the main body are formed of spherical surfaces that play with each other, the peripheral surface of the valve body and the seat ring mounting surface 11b of the inner surface 11a of the main body When machining the circumferential part of
It can be processed with a single chucking operation. Note that, at this time, machining of both spherical surfaces of the sliding part is normally performed using an NC lathe.
更にまた、弁体１５は、全閉時、弁体ハブ部外
端面に形成された凸部１７の平面部１７ａを、本
体内面１１ａの弁棒穴周縁に形成された凸部１３
の平面部１３ｂに当接させることによつて、弁閉
止位置の位置決めを行なうと同時に、弁体を加圧
することによつて生じる不均合いトルクによる弁
体のオーバーランを防止している。また、弁体１
５の全開時においても、上記弁体ハブ部の凸部１
７の他端部に形成された平面部１７ｂが、本体内
面１１ａの球面凸部１３の立上げスロープ１３ｃ
に当接して、オーバーランを防いでいる。 Furthermore, when the valve body 15 is fully closed, the flat portion 17a of the convex portion 17 formed on the outer end surface of the valve body hub portion is connected to the convex portion 13 formed on the periphery of the valve stem hole on the inner surface 11a of the main body.
By contacting the flat portion 13b of the valve body, the valve closing position is determined and, at the same time, overrun of the valve body due to unbalanced torque caused by pressurizing the valve body is prevented. In addition, valve body 1
5, even when fully opened, the convex portion 1 of the valve body hub portion
A flat portion 17b formed at the other end of the main body 7 serves as a rising slope 13c of the spherical convex portion 13 on the inner surface 11a of the main body.
This prevents overrun.
また、弁閉止位置を決める両平面部１３ｂと１
７ａは、は、上記した本体内面の弁棒穴周縁部の
一部に設けられた凸部１３と弁体ハブ部の凸部１
７とのみに形成されているので、加工が容易であ
る。 Also, both flat parts 13b and 1 which determine the valve closing position are provided.
7a is a convex portion 13 provided on a part of the periphery of the valve stem hole on the inner surface of the main body and a convex portion 1 of the valve body hub portion.
Since it is formed only with 7, it is easy to process.
上記実施例において、本体内面に形成される凸
部１３及びこれに支持される弁体ハブ部１６の球
面部１６ａ、従つてまた凸部１７の大きさ、つま
り弁棒穴を囲繞する角度範囲は、図示のような角
度範囲に限られず、弁体の大きさ、弁体に作用す
る流体圧力等に応じて適宜設計変更されることは
勿論である。 In the above embodiment, the size of the convex portion 13 formed on the inner surface of the main body and the spherical surface portion 16a of the valve body hub portion 16 supported by the convex portion 17, that is, the angular range surrounding the valve stem hole is Of course, the angle range is not limited to the one shown in the drawings, and the design may be changed as appropriate depending on the size of the valve body, the fluid pressure acting on the valve body, etc.
以上説明したように、本発明によれば、弁体の
弁棒接続用ハブ部外端面の弁棒穴周縁の弁体と対
向する位置に、弁体と平行をなす弁棒穴中心線を
含む平面上に平面部を有する凸部を形成すると共
に、本体内面の弁棒貫通穴周縁の弁体側に、上記
平面部と当接関係にある平面部を有する凸部を設
け、両平面部を当接させることによつて弁閉止位
置の位置決めを行なうようにしたことにより、次
のような効果が奏される。
As explained above, according to the present invention, the valve stem hole center line parallel to the valve body is included in the outer end surface of the valve stem connection hub part of the valve body at a position facing the valve body on the periphery of the valve stem hole. A convex portion having a flat portion is formed on a flat surface, and a convex portion having a flat portion in contact with the flat portion is provided on the valve body side of the periphery of the valve stem through hole on the inner surface of the main body, and both flat portions are brought into contact. The following effects can be achieved by determining the valve closing position by bringing them into contact with each other.
() 本体と弁体の両者において、１チヤツキン
グ加工を行なうことができ、加工工程が２工程
以上要しない。従つて、機械の段取り替えを必
要としないので、加工時間が短縮でき、加工コ
ストを安価にすることができる。() One chucking process can be performed on both the main body and the valve body, and no more than two machining steps are required. Therefore, since there is no need to change the setup of the machine, the machining time can be shortened and the machining cost can be reduced.
() 本体と弁体の加工面を当接させることによ
つてストツパとしての機能が発揮されるため、
弁の全閉位置が自動的に決められ、従つて、閉
位置調整が不要である。() It functions as a stopper by bringing the machined surfaces of the valve body into contact with the valve body.
The fully closed position of the valve is automatically determined and therefore no close position adjustment is required.
() 上記第２項によつて、弁体にアクチユエー
タを取り付けた場合、該アクチユエータにメカ
ニカルストツパのないものを使用することがで
きる。() According to item 2 above, when an actuator is attached to the valve body, it is possible to use an actuator without a mechanical stopper.
() 流路内に障害物となる突起を設けなくて済
むので、Cv値が大きくとれ、当該バタフライ
弁をコントロール制御にも使用することができ
る。() Since there is no need to provide a protrusion that becomes an obstacle in the flow path, a large Cv value can be obtained, and the butterfly valve can also be used for control.
() 弁体周面部のエツジ部を旋削する上で旋削
加工の障害となる突起等が皆無であるから、ス
テライト盛り等の表面硬化処理を容易に行なう
ことができる。() When turning the edge portion of the peripheral surface of the valve body, since there are no protrusions or the like that would impede the turning process, surface hardening treatments such as stellite coating can be easily performed.
() 弁体ハブ部外端面に形成された凸部の端面
の一つを利用して、開側オーバーラン防止機能
を持たせることが容易である。() It is easy to provide an opening side overrun prevention function by using one of the end surfaces of the convex portion formed on the outer end surface of the valve body hub portion.
第１図は本発明の一実施例を示す偏芯型バタフ
ライ弁の弁体を分離して示した説明用斜視図、第
２図は本体内面の要部斜視図、第３図は弁体ハブ
部の要部斜視図、第４図は第１図−線を含む
垂直平面で切断した全閉状態にある本体と弁体部
分を、矢印方向より見た要部側断面図、第５図、
第６図Ａ，Ｂ及び第７図Ａ，Ｂは従来例を示す断
面図と底面図である。
１１……本体、１１ａ……本体内面、１１ｂ…
…シートリング装着面、１３……凸部、１３ａ…
…球面部、１３ｂ……平面部、１３ｃ……立上げ
スロープ、１５……弁体、１６……ハブ部、１６
ａ……球面部、１７……凸部、１７ａ，１７ｂ…
…平面部、１８……シートリング、１９……シー
トリングリテーナ。
Fig. 1 is an explanatory perspective view showing the valve body of an eccentric butterfly valve separated according to an embodiment of the present invention, Fig. 2 is a perspective view of essential parts of the inner surface of the main body, and Fig. 3 is a valve body hub. FIG. 4 is a side sectional view of the main body and valve body in a fully closed state taken along a vertical plane including the line in FIG. 1, as seen from the direction of the arrow; FIG.
FIGS. 6A and 6B and FIGS. 7A and 7B are a sectional view and a bottom view of a conventional example. 11...Main body, 11a...Inner surface of main body, 11b...
...Seat ring mounting surface, 13...Protrusion, 13a...
...Spherical part, 13b...Plane part, 13c...Starting slope, 15...Valve body, 16...Hub part, 16
a... Spherical part, 17... Convex part, 17a, 17b...
...Flat part, 18... Seat ring, 19... Seat ring retainer.
Claims (1)
体内に偏芯回転できるように支持した偏芯型バタ
フライ弁において、弁体の弁棒接続用ハブ部外端
面の弁棒穴周縁の弁体と対向する位置に、弁体と
平行をなす弁棒穴中心線を含む平面上に平面部を
有する凸部を形成すると共に、本体内面の弁棒貫
通穴周縁の弁体側に、上記平面部と当接関係にあ
る平面部を有する凸部を設け、両平面部を当接さ
せることによつて、弁閉止位置の位置決めを行な
うようにしたことを特徴とする偏芯型バタフライ
弁の弁体全閉位置ストツパ機構。 ２ 上記弁体ハブ部及び本体内面の両平面部の加
工が１工程で行えるようになつている特許請求の
範囲第１項記載の偏芯型バタフライ弁の弁体全閉
位置ストツパ機構。 ３ 上記弁体ハブ部外端面に形成された凸部が開
側オーバーラン防止機能を有している特許請求の
範囲第１項記載の偏芯型バタフライ弁の弁体全閉
位置ストツパ機構。[Scope of Claims] 1. In an eccentric butterfly valve in which a valve stem is attached to a valve stem connection hub part of a valve body and supported for eccentric rotation within the main body, the valve stem is attached to a valve stem connection hub part of the valve body outside the valve stem connection hub part. A convex portion having a flat surface on a plane including the center line of the valve stem hole parallel to the valve body is formed at a position facing the valve body on the periphery of the valve stem hole on the end face, and a convex portion is formed on the periphery of the valve stem through hole on the inner surface of the main body. A convex portion having a flat portion in contact with the flat portion is provided on the valve body side of the valve body, and the valve closing position is determined by bringing both flat portions into contact with each other. Fully closed valve body stopper mechanism for eccentric butterfly valves. 2. The valve body fully closed position stopper mechanism for an eccentric butterfly valve according to claim 1, wherein both the valve body hub portion and the flat surface portion of the inner surface of the main body can be processed in one step. 3. The valve body fully closed position stopper mechanism for an eccentric butterfly valve according to claim 1, wherein the convex portion formed on the outer end surface of the valve body hub portion has an opening side overrun prevention function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12840287A JPS63293366A (en) | 1987-05-27 | 1987-05-27 | Stopper mechanism for full close position of valve element in eccentric type butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12840287A JPS63293366A (en) | 1987-05-27 | 1987-05-27 | Stopper mechanism for full close position of valve element in eccentric type butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63293366A JPS63293366A (en) | 1988-11-30 |
| JPH0457911B2 true JPH0457911B2 (en) | 1992-09-16 |
Family
ID=14983902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12840287A Granted JPS63293366A (en) | 1987-05-27 | 1987-05-27 | Stopper mechanism for full close position of valve element in eccentric type butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63293366A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015137571A (en) * | 2014-01-21 | 2015-07-30 | フタバ産業株式会社 | valve |
-
1987
- 1987-05-27 JP JP12840287A patent/JPS63293366A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63293366A (en) | 1988-11-30 |
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