JP3410682B2 - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JP3410682B2 JP3410682B2 JP18245199A JP18245199A JP3410682B2 JP 3410682 B2 JP3410682 B2 JP 3410682B2 JP 18245199 A JP18245199 A JP 18245199A JP 18245199 A JP18245199 A JP 18245199A JP 3410682 B2 JP3410682 B2 JP 3410682B2
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve
- seat ring
- outer peripheral
- seat
- 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 - Fee Related
Links
Landscapes
- Valve Housings (AREA)
- Lift Valve (AREA)
Description
【０００１】[0001]
【発明の属する分野】この発明は、配管を流過する高
温、高圧流体を開閉、制御する偏心型バタフライ弁、特
に長期にわたって安定した使用が可能な三重偏心型バタ
フライ弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eccentric butterfly valve that opens and closes and controls a high temperature and high pressure fluid flowing through a pipe, and more particularly to a triple eccentric butterfly valve that can be stably used for a long period of time.
【０００２】[0002]
【従来の技術】従来、弁棒と直交する方向において弁体
及びシートリングの封止部の一方を他方に対して傾斜さ
せた三重偏心型バタフライ弁は公知であり、例えば特公
昭４７−１６８９５号公報、特公平３−１０８２８号公
報、実開昭５７−５９２５８号公報等に開示されてい
る。これら公知の三重偏心型バタフライ弁は、弁体外周
縁にエラストマ等の弁座を取付板等の部材でボルト締め
して定着させているため、弁体断面形状が大となり、弁
全開時における圧力損失が大きく、弁体部分の流速が高
くなる。このため、取付部材及びボルト類近傍において
振動が発生し、取付部分の弛緩、脱落等の危険があっ
た。又、流体中に含まれる不純物、異物或は硬質な砂等
により、弁全開時に弁体の上流側外周縁部が摩滅或は損
傷し、弁全閉時において弁体が本体側弁座部に確実に圧
接しなくなるため、流体漏洩の原因となっている。2. Description of the Related Art Conventionally, a triple eccentric butterfly valve in which one of the sealing portions of the valve body and the seat ring is inclined with respect to the other in the direction orthogonal to the valve rod is well known, for example, Japanese Patent Publication No. 47-16895. It is disclosed in Japanese Patent Publication No. 3-10828, Japanese Utility Model Publication No. 57-59258, and the like. In these known triple eccentric butterfly valves, a valve seat such as an elastomer is fixed to the outer peripheral edge of the valve body by bolting it with a member such as a mounting plate, so that the valve body has a large cross-sectional shape and pressure loss when the valve is fully opened. Is large and the flow velocity in the valve body portion is high. For this reason, vibration is generated in the vicinity of the mounting member and the bolts, and there is a risk that the mounting portion may loosen or fall off. In addition, impurities, foreign matter, or hard sand contained in the fluid may wear or damage the upstream outer peripheral edge of the valve element when the valve is fully opened, and the valve element may become the main body side valve seat portion when the valve is fully closed. It will cause pressure leakage, which causes fluid leakage.
【０００３】[0003]
【発明が解決しようとする課題】この発明は、弁座部を
弁体外周部に代えて弁本体側に定着させることにより、
弁体の断面形状、特に厚みを小さくすることを可能と
し、弁全開時の圧力損失を小さくして振動発生を抑制す
ると共に、流体中の不純物、異物による摩滅、損傷を減
少し、流体漏洩の原因を消失させることを課題とする。SUMMARY OF THE INVENTION According to the present invention, the valve seat portion is fixed to the valve body side instead of the outer peripheral portion of the valve body.
It is possible to reduce the cross-sectional shape of the valve body, especially the thickness, to reduce the pressure loss when the valve is fully open to suppress vibration generation, and to reduce wear and damage due to impurities and foreign substances in the fluid and to prevent fluid leakage. The task is to eliminate the cause.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
にこの発明が採った手段は、略円筒状の流体通路を貫設
した弁本体と、該弁本体に弁棒を介して回動自在に軸支
された剛性材料からなる円盤状の弁体とからなり、弁体
の中心に対して弁棒を偏心して軸支し、弁体外周縁部及
びシートリングを円錐台形に形成し、該円錐台形の頂点
を弁本体長手方向中心線から偏心させた三重偏心型バタ
フライ弁において、弁本体にシートリングとシートリン
グ押え部材とを複数の取付ボルトで着脱自在に仮締結
し、配管接続時に配管フランジで本締結すると共に、弁
体外周縁に別体のシール部材を溶着し、弁体の開弁作動
方向下流側外周縁の前面及び背面の両面に弁体の下流側
外周縁に沿って末広がり状に延びる魚尾状張出部を形成
したことを特徴とする。In order to solve the above-mentioned problems, the means adopted by the present invention is a valve main body having a substantially cylindrical fluid passage extending therethrough, and the valve main body is rotatable through a valve rod. A disc-shaped valve body made of a rigid material that is rotatably supported on the valve body.
And seat ring are formed in a truncated cone shape, and the apex of the truncated cone shape
In a triple eccentric butterfly valve in which the valve is eccentric from the centerline in the longitudinal direction of the valve body, the seat ring and the seat ring pressing member are detachably temporarily fastened to the valve body with a plurality of mounting bolts, and at the time of pipe connection. In addition to the main fastening with the piping flange, a separate seal member is welded to the outer peripheral edge of the valve element, and the downstream side of the valve element is located on both the front and back sides of the outer peripheral edge on the downstream side in the valve opening operation direction of the valve element.
It is characterized in that a fishtail-like overhanging portion extending in a divergent manner is formed along the outer peripheral edge .
【０００５】弁体の背面である弁棒挿通部側の魚尾状張
出部の高さを、弁棒挿通部分の最大厚み未満とし、かつ
前面側の魚尾状張出部より低くしたことを特徴とする。 Fish-tail-shaped tension on the valve rod insertion portion side, which is the back surface of the valve body
The height of the protruding part should be less than the maximum thickness of the valve rod insertion part, and
It is characterized in that it is lower than the fishtail-like overhanging portion on the front side.
【０００６】弁本体とシート押え部材の角隅部にガスケ
ットを配設し、流体の外部漏洩を防止したことを特徴と
する。Gaskets are arranged at the corners of the valve body and the seat pressing member to prevent fluid from leaking to the outside.
【０００７】[0007]
【発明の実施の形態】この発明の好ましい実施の形態
を、以下に詳細に説明する。図面を参照して、(１)は弁
本体であり、略円筒状の流体通路(２)が貫設され、該流
体通路(２)を開閉する円盤状の弁体(３)が弁棒(４)で回
動自在に軸支されている。弁体(３)は、外周面を楕円形
状とした金属等の剛性材料からなり、弁棒ピン(６)で弁
棒(４)が固定される。弁棒(４)の一端は弁本体の外方に
延び出し、その外端に手動、電動、或は圧力等で駆動さ
れる所望のアクチュエータが連結され、弁体(３)を駆動
回転することが出来る。(５)は、弁体(３)の外周面に圧
接され弁を閉止するシートリングであって、弁本体(１)
の内周面に定着される。シートリング(５)の内周面は、
弁体(３)の外周面の楕円形状に倣った楕円形状に形成さ
れ、弁体(３)との密着性を保障している。シートリング
(５)は、シート押え部材(７)で弁本体(１)に定着されつ
つ、弁体(３)の外周面に形成したシート面と弁本体(１)
に取り付けたシートリング(５)を、弁体(３)の中心と弁
棒(４)の中心から離す一次偏心と、弁本体(１)の中心か
ら離す二次偏心と、弁本体(１)と弁体(３)のシール面を
構成する円錐形状の頂点を弁棒(４)の反対側に位置させ
つつ弁本体(１)の中心線に対して傾斜させる三次偏心
の、三重の偏心で構成している。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below. Referring to the drawings, (1) is a valve body, a substantially cylindrical fluid passage (2) is provided therethrough, and a disc-shaped valve body (3) for opening and closing the fluid passage (2) is a valve rod ( It is rotatably supported by 4). The valve body (3) is made of a rigid material such as metal having an outer peripheral surface of an elliptical shape, and the valve rod (4) is fixed by the valve rod pin (6). One end of the valve rod (4) extends to the outside of the valve body, and a desired actuator driven manually, electrically, or by pressure is connected to the outer end of the valve rod (3) to drive and rotate it. Can be done. (5) is a seat ring that is pressed against the outer peripheral surface of the valve body (3) to close the valve, and the valve body (1)
Is fixed on the inner surface of the. The inner peripheral surface of the seat ring (5) is
The valve body (3) is formed into an elliptical shape following the elliptical shape of the outer peripheral surface of the valve body (3) to ensure the close contact with the valve body (3). Seat ring
(5) is fixed to the valve body (1) by the seat pressing member (7), and the seat surface formed on the outer peripheral surface of the valve body (3) and the valve body (1)
The seat ring (5) attached to the valve body (3), the primary eccentricity away from the center of the valve body (3) and the valve rod (4), the secondary eccentricity away from the center of the valve body (1), and the valve body (1) With the triple eccentricity of the third eccentricity in which the conical apex that forms the sealing surface of the valve body (3) is located on the opposite side of the valve rod (4) and is inclined with respect to the center line of the valve body (1). I am configuring.
【０００８】シートリング(５)は、薄い金属板とグラフ
ァイト（黒鉛）をラミネートしたメタルシートからな
り、弁本体(１)とシート押え部材(７)の間に挟み込んで
定着される。又、弁本体(１)及びシート押え部材(７)の
シートリング(５)との当接面には、段部(１a)(７a)がそ
れぞれ設けられ、この段部にシートリング(５)の段部
(５a)を係合させて、シートリング(５)の内径方向への
抜け出しを防止している。シートリング(５)及びシート
押え部材(７)は、シートリング(５)の外周面と同心円上
に等ピッチで配設された複数の取付ボルト(８)により、
弁本体(１)に共締めして仮固定される。尚、シート押え
部材(７)の内径をシートリング(５)の内径と相似で且若
干大きな楕円形状とすることにより、シート押え部材
(７)と弁体(３)との接触を回避することが出来ると共
に、シートリングの外径に対して弁本体内径寸法を考慮
することにより、弁体(３)との接触によりシートリング
(５)の自動調心機能を得ることが出来る。仮固定された
取付ボルト(８)は、図１に示すように配管フランジ(９)
により本締結され、確実にフランジ部が圧着され、角隅
部のガスケット(10)と相まって外部への流体の漏洩を防
止することが出来る。又、仮締結された取付ボルト(８)
は、配管時に配管ガスケット(11)により封止されるの
で、弛緩、脱落の危険性はなく、搬送時にシート押え部
材が脱落しない程度のボルト数で良いため構造が簡略化
される。The seat ring (5) is composed of a thin metal plate and a metal sheet laminated with graphite (graphite), and is fixed by being sandwiched between the valve body (1) and the seat pressing member (7). Further, step portions (1a) and (7a) are provided on the contact surfaces of the valve body (1) and the seat pressing member (7) with the seat ring (5), and the seat ring (5) is provided on these step portions. Step
The seat ring (5) is prevented from slipping out in the inner diameter direction by engaging (5a). The seat ring (5) and the seat pressing member (7) are attached by a plurality of mounting bolts (8) arranged on the outer circumference of the seat ring (5) and on a circle concentric with the same pitch.
The valve body (1) is fastened together and temporarily fixed. In addition, by making the inner diameter of the seat pressing member (7) similar to the inner diameter of the seat ring (5) and slightly elliptical,
The contact between (7) and the valve body (3) can be avoided, and the seat ring can be contacted with the valve body (3) by considering the inner diameter of the valve body with respect to the outer diameter of the seat ring.
The automatic alignment function of (5) can be obtained. As shown in Fig. 1, the temporarily fixed mounting bolt (8) is attached to the pipe flange (9).
By this, the main fastening is carried out, the flange portion is securely crimped, and the leakage of the fluid to the outside can be prevented together with the gasket (10) at the corner portion. Also, the temporarily tightened mounting bolts (8)
Since it is sealed by the pipe gasket (11) during piping, there is no risk of loosening or dropping, and the structure is simplified because the number of bolts is such that the sheet pressing member does not drop during transportation.
【０００９】シートリング(５)の内周面及び弁体(３)の
外周面は、共に楕円形状を有しており、弁体(３)の外周
縁とシートリング(５)の内周縁は、弁体を若干大、シー
トリングを若干小とするほぼ同径に形成されている。そ
して、図６に示すように、弁体(３)は弁棒(４)の軸心
（ｉ）を中心として図において反時計方向に回動し、弁
棒(４)の軸心（ｉ）は弁体(３)の外周面が形成する円錐
面の頂点（ａ）の反対側に位置し、弁体(３)の中心線
（ｅ）から一次偏心（ｆ）だけ偏らされ、更に、弁本体
及び弁体の中心線（ｈ）から二次偏心（ｇ）だけ偏らさ
れている。尚、水平弁座（Ａ）の水平線（ｂ）上に頂点
（ａ）が位置し、頂角（ｊ）は通常２０度程度が好まし
く、他方の傾斜線（ｄ）上に傾斜弁座（Ｂ）を設けてい
る。そして、頂角（ｊ）の半角が円錐の中心線（ｃ）と
なり、該中心線（ｃ）に対して弁体(３)及び弁座等を対
称形に形成している。一方、シートリング(５)の外周面
と弁本体(１)の内周面は共に真円に形成されており、シ
ート押え部材(７)を介してシートリング(５)を弁本体
(１)に定着、固定している。The inner peripheral surface of the seat ring (5) and the outer peripheral surface of the valve body (3) both have an elliptical shape, and the outer peripheral edge of the valve body (3) and the inner peripheral edge of the seat ring (5) are , The valve body is slightly larger and the seat ring is slightly smaller, and they are formed to have substantially the same diameter. Then, as shown in FIG. 6, the valve body (3) rotates counterclockwise around the shaft center (i) of the valve rod ( 4 ) in the figure, and the shaft center (i) of the valve rod ( 4 ) is rotated. Is located on the opposite side of the apex (a) of the conical surface formed by the outer peripheral surface of the valve body (3), and is deviated from the center line (e) of the valve body (3) by a primary eccentricity (f). It is deviated by the secondary eccentricity (g) from the center line (h) of the main body and the valve body. The apex (a) is located on the horizontal line (b) of the horizontal valve seat (A), the apex angle (j) is usually preferably about 20 degrees, and the tilted valve seat (B) is placed on the other tilted line (d). ) Is provided. The half angle of the apex angle (j) becomes the center line (c) of the cone, and the valve body (3), the valve seat, etc. are formed symmetrically with respect to the center line (c). On the other hand, the outer peripheral surface of the seat ring (5) and the inner peripheral surface of the valve body (1) are both formed into a perfect circle, and the seat ring (5) is attached to the valve body through the seat pressing member (7).
It is fixed and fixed in (1).
【００１０】シート押え部材(７)の外周面に位置合わせ
のための合いマークを設けると共に、この合いマークに
対応する合いマークをシートリング(５)及び弁本体(１)
にそれぞれ設ける。シート押え部材(７)、シートリング
(５)の外周及び弁本体の内周は共に円形であるのに対
し、シート押え部材(７)及びシートリング(５)の内周は
楕円形であるため、取付ボルト(８)の取付、締付状態に
よってはシートリング(５)及びシート押え部材(７)の定
着位置が円周方向に偏ることが懸念されるが、前記合い
マークを合致させることで、シートリング(５)及びシー
ト押え部材(７)の定着位置が円周方向に偏るのを回避す
ることが出来る。他方、弁棒(４)に固着された弁体(３)
は、弁軸方向に対して弁体外周縁の楕円形状が決められ
ており、円錐状弁座に確実に定着することが漏洩防止効
果の改善につながる。A matching mark for alignment is provided on the outer peripheral surface of the seat pressing member (7), and a matching mark corresponding to this matching mark is provided on the seat ring (5) and the valve body (1).
It is provided in each. Seat retainer (7), seat ring
The outer circumference of (5) and the inner circumference of the valve body are both circular, whereas the inner circumferences of the seat pressing member (7) and seat ring (5) are elliptical, so mounting bolts (8), Depending on the tightened state, the fixing positions of the seat ring (5) and the sheet pressing member (7) may be offset in the circumferential direction. However, by aligning the alignment marks, the seat ring (5) and the sheet pressing member (7) It is possible to prevent the fixing position of the member (7) from deviating in the circumferential direction. On the other hand, the valve body (3) fixed to the valve rod (4)
Has an elliptical shape of the outer peripheral edge of the valve body with respect to the valve axis direction, and the reliable fixation on the conical valve seat leads to an improvement in the leakage prevention effect.
【００１１】又、シートリング(５)を固定するシート押
え部材(７)の内周面は、シートリング(５)の内周面より
大きな相似形の楕円形状に形成されており、シートリン
グ(５)の内径方向への突出長さを全周に亘って一定とす
ることにより、弁全閉時における弁体(３)による加圧変
形量が全周に亘って一定し安定したシール性を得ること
が可能となる。尚、図６において、入力角（ｋ）は開か
ら閉に至る着座時の角度を示し、シール性と弁開閉の容
易性（離脱及び着座）の観点から、１５度程度に設定す
るのが望ましい。すなわち、入力角（ｋ）が大きい場合
は、弁開閉は容易となるがシール性が低下し、逆に入力
角（ｋ）を小さくした場合は、シール性は増大するが弁
開閉が困難となってしまう。Further, the inner peripheral surface of the seat pressing member (7) for fixing the seat ring (5) is formed in an elliptical shape having a similar shape to that of the inner peripheral surface of the seat ring (5). By making the protruding length of 5) in the inner diameter direction constant over the entire circumference, the amount of pressurizing deformation by the valve body (3) at the time of fully closing the valve is constant over the entire circumference and stable sealing performance is achieved. It becomes possible to obtain. Incidentally, in FIG. 6, the input angle (k) indicates an angle at the time of seating from opening to closing, and it is desirable to set it to about 15 degrees from the viewpoint of sealing property and easiness of valve opening / closing (separation and seating). . That is, when the input angle (k) is large, the valve opening and closing becomes easy, but the sealing performance deteriorates. Conversely, when the input angle (k) is small, the sealing performance increases but the valve opening and closing becomes difficult. Will end up.
【００１２】図１において、弁棒(４)を水平に配置し、
流体の流れ方向を左側（弁体の平坦面側）とし、傾斜弁
座を下方とし、水平弁座を上方として、弁体(３)を反時
計方向に回動させて、流体中の異物等が混入している海
水等を制御する場合、異物は弁体(３)の回動方向とは逆
の位置に堆積されるため、弁体(３)の開閉性は確保さ
れ、弁開閉に支障を生ずるようなトラブルの発生はなく
なる。又、この場合には弁体(３)の平坦側に作用する流
体流れによる力が、理論上開き勝手の方向に作用するた
め、弁開閉の容易性及び回動トルクが改善される。逆に
流れが弁棒側である場合には、逆に閉まり勝手の力が弁
体に作用するため、シール性は増大するが、開閉性が悪
くなり、回動トルクが増大する。流体の種類及び流れに
よっても相違するが、弁棒の回動トルクは４０％程度も
増加する。In FIG. 1, the valve rod (4) is arranged horizontally,
The flow direction of the fluid is on the left side (the flat surface side of the valve body), the tilted valve seat is on the lower side, the horizontal valve seat is on the upper side, and the valve body (3) is rotated in the counterclockwise direction to remove foreign matter in the fluid. When controlling seawater mixed with water, foreign matter is accumulated in the position opposite to the direction of rotation of the valve body (3), so the openability of the valve body (3) is secured and the valve opening and closing is hindered. The troubles that cause Further, in this case, since the force due to the fluid flow acting on the flat side of the valve body (3) theoretically acts in the direction of opening, the ease of opening and closing the valve and the turning torque are improved. On the contrary, when the flow is on the valve rod side, conversely, a closing force acts on the valve body, so that the sealing property increases, but the opening and closing property deteriorates, and the turning torque increases. Although it depends on the type and flow of the fluid, the turning torque of the valve rod increases by about 40%.
【００１３】図５に示すように、弁体(３)の外周面に
は、流体の種類、圧力、温度等の流体仕様条件により、
耐食性、耐摩耗性に優れた金属、例えばステンレス鋼、
ニッケル合金等からなるシール面(３a)が、弁体(３)の
外周面に肉盛り溶接等の方法で一体に形成される。弁体
(３)が小口径のものは、一体に鋳造成形しても良いが、
特に大口径弁等においては図５に示すように別体の金属
を溶着形成するのが望ましい。シール面(３a)を形成す
るステンレス鋼としては、オーステナイト系、フェライ
ト系等があり、好ましくはＳＵＳ３１６Ｌ、ＳＵＳＹ４
３０等である。又ニッケル合金としては、ニッケル・モ
リブデン系、ニッケル・モリブデン・クロム系等があ
り、好ましくはＤＮｉＭｏ−１，ＤＮｉＣｒＭｏ−３等
である。シール面(３a)は、シートリング(５)とは材
質、表面硬さを異ならせて、シートリング(５)より表面
硬さを高くするのが好ましく、例えばＨＢ４１０程度す
る。シートリング(５)は、流体仕様条件により前記金属
とグラファイトをラミネートしたメタルシートの他、例
えばステンレス鋼、ニッケル合金等の金属単一材、エラ
ストマ、フッ素樹脂等の非金属或は金属と非金属の複合
材で構成しても良い。As shown in FIG. 5, on the outer peripheral surface of the valve body (3), depending on the fluid specification conditions such as fluid type, pressure and temperature,
Metals with excellent corrosion resistance and wear resistance, such as stainless steel,
A sealing surface (3a) made of nickel alloy or the like is integrally formed on the outer peripheral surface of the valve body (3) by a method such as build-up welding. Disc
If (3) has a small diameter, it may be integrally cast.
Particularly in a large-diameter valve or the like, it is desirable to form a separate metal by welding as shown in FIG. As the stainless steel forming the sealing surface (3a), there are austenite type, ferrite type, etc., and preferably SUS316L, SUSY4.
It is 30 mag. As the nickel alloy, there are nickel / molybdenum series, nickel / molybdenum / chromium series and the like, and DNiMo-1 and DNiCrMo-3 are preferable. The sealing surface (3a) is preferably made of a material and a surface hardness different from that of the seat ring (5) so that the sealing surface (3a) has a higher surface hardness than the seat ring (5), for example, HB410. The seat ring (5) is, in addition to a metal sheet in which the above metal and graphite are laminated according to fluid specifications, a single metal material such as stainless steel or nickel alloy, a non-metal such as an elastomer or a fluororesin, or a metal and a non-metal. The composite material may be used.
【００１４】弁体(３)の開弁方向の下流側外周縁には、
図３，４に示すように魚尾状の張出部(３b)(３c)を形成
して、バタフライ弁の固有トルクの一つである流体の動
的トルク（アンバランストルク）を改善する。弁体は開
度約７５゜付近において最大トルクを生じ、弁体を閉じ
ようとする働きをする。弁棒挿通部側の魚尾状張出部
(３b)の高さを、弁棒挿通部分の最大厚み未満とし、且
反対側の魚尾状張出部(３c)より低くすることにより、
動的トルク値を従来のものより最大約２５〜４０％程度
減少することが出来、小型のモータ若しくは動力手段の
使用が可能となる。魚尾状張出部は、弁体(３)の中心に
おける断面形状が図１に示すように魚の尾のように左右
に張り出した形状を有し、弁体の下流側外周縁に沿って
末広がり状に延びた形状をなしており、弁体の前面及び
背面の両面に形成されている。弁体の下流側外周縁は、
傾斜弁座(３d)に形成される。On the downstream outer peripheral edge of the valve body (3) in the valve opening direction,
As shown in FIGS. 3 and 4, fish tail-shaped overhangs (3b) and (3c) are formed to improve the dynamic torque (unbalanced torque) of the fluid, which is one of the intrinsic torques of the butterfly valve. The valve element produces a maximum torque in the vicinity of the opening of about 75 ° and acts to close the valve element. Fishtail-shaped overhanging part on the side of the valve rod insertion part
By making the height of (3b) less than the maximum thickness of the valve rod insertion portion and lower than the fishtail-like overhanging portion (3c) on the opposite side,
The dynamic torque value can be reduced by up to about 25-40% compared to the conventional one, and it becomes possible to use a small motor or power means. The fish-tail-shaped overhanging portion has a cross-sectional shape at the center of the valve body (3) that projects laterally like a fish tail as shown in FIG. 1, and has a flared shape along the downstream outer peripheral edge of the valve body. It has a shape that extends to the front and back sides of the valve body. The downstream outer peripheral edge of the valve body is
It is formed on the tilted valve seat (3d).
【００１５】[0015]
【発明の効果】この発明によれば、以下のような効果を
奏することが出来る。弁本体のシートリングは長期の
使用が出来、又、摩滅等の場合には着脱が容易となり、
弁体開弁時の流入側外周縁部に耐食・耐摩耗性金属から
なるシート面を一体的に形成してあるので、流体による
摩滅・損傷を防止することが出来る、シート押え部材
によりシートリングをボルトで仮締結し、次いで配管接
続フランジにより本締結するので、確実にフランジ部が
圧着され、角隅部のガスケットと相まって外部への流体
漏洩をなくすことが出来る、仮締結したボルトは、配
管ガスケットにより封止されるので、弛緩、脱落の危険
性がない、仮締結したボルトは、シートリングを強圧
することがなく、搬送時にシート押え部材が脱落しない
程度のボルト数でよいから、構造が簡略化される、弁
体外周縁部に流体条件に最適の金属を一体に溶着するの
で、弁体断面形状、特に肉厚を強度上許容する範囲内に
おいて薄肉化でき、重量削減に有益となる、開弁作動
方向の下流側外周縁に魚尾状張出部を形成することによ
り、微少開度、中間開度において流体の動的トルク（ア
ンバランストルク）を減少することが出来、小型で安価
なアクチュエータで弁の開閉、制御が可能となる、シ
ートリング及び弁体のシール面が円錐台形状であるの
で、二つの面が楔状に一体化して緊密なシール効果を発
揮することが出来る、シール面は、通過する流体条件
（流体種類、圧力、温度等）により、最適の材料を選択
形成することが出来、長期にわたって安定使用すること
が出来る。According to the present invention, the following effects can be achieved. The seat ring of the valve body can be used for a long period of time, and it can be easily attached and detached in case of wear and the like.
Since the seat surface made of corrosion- and wear-resistant metal is integrally formed on the outer peripheral edge of the inflow side when the valve body is opened, it is possible to prevent wear and damage due to fluid. Are temporarily fastened with bolts and then permanently fastened with pipe connection flanges, so the flanges are securely crimped, and the leakage of fluid to the outside can be eliminated in combination with the gaskets at the corners. Since it is sealed with a gasket, there is no risk of loosening or falling off.The temporarily tightened bolts do not apply strong pressure to the seat ring, and the number of bolts does not drop off the sheet pressing member during transportation, so the structure is Since the metal that is most suitable for the fluid conditions is integrally welded to the outer peripheral edge of the valve body, it is possible to reduce the valve body cross-sectional shape, especially the wall thickness within the range that allows strength, and reduce the weight. By forming a fish-tail-shaped overhanging portion on the outer peripheral edge on the downstream side in the valve opening operation direction, which is useful for, it is possible to reduce the dynamic torque (unbalance torque) of the fluid at a minute opening and an intermediate opening. It is possible to open / close and control the valve with a small and inexpensive actuator. Since the sealing surfaces of the seat ring and the valve body are frustoconical, the two surfaces are integrated in a wedge shape to achieve a tight sealing effect. It is possible to select and form the optimum material for the sealing surface depending on the fluid conditions (fluid type, pressure, temperature, etc.) passing through, and it is possible to use it stably for a long period of time.
【図１】この発明にかかる偏心型バタフライ弁の断面図FIG. 1 is a sectional view of an eccentric butterfly valve according to the present invention.
【図２】弁体と弁座部の拡大断面図FIG. 2 is an enlarged sectional view of a valve body and a valve seat portion.
【図３】弁体の側面図FIG. 3 is a side view of the valve body.
【図４】弁体の正面及び背面をＡ−Ａ’線において区別
して図示する平面図FIG. 4 is a plan view showing a front surface and a back surface of a valve disc, which are distinguished from each other along a line AA ′
【図５】弁体のシール面を拡大して示す断面図FIG. 5 is an enlarged sectional view showing a sealing surface of a valve body.
【図６】弁体における弁棒及び弁座の関係を示す説明図FIG. 6 is an explanatory view showing the relationship between the valve rod and the valve seat in the valve body.
(１)弁本体 (１a)段部 (２)流体通路 (３)弁体 (３a)シール面 (３b)魚尾状張出部 (３c)魚尾状張出部 (３d)傾斜弁座 (４)弁棒 (５)シートリング (５a)段部 (６)弁棒ピン (７)シート押え部材 (７a)段部 (８)取付ボルト (９)配管フランジ (10)ガスケット (11)配管ガスケット (1) Valve body (1a) Step (2) Fluid passage (3) Disc (3a) Sealing surface (3b) Fishtail overhang (3c) Fishtail-shaped overhang (3d) Tilt valve seat (4) Valve stem (5) Seat ring (5a) Step (6) Valve pin (7) Sheet pressing member (7a) Step (8) Mounting bolt (9) Piping flange (10) Gasket (11) Piping gasket
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平11−13898（ＪＰ，Ａ) 特開 平11−148563（ＪＰ，Ａ) 特開 昭63−235773（ＪＰ，Ａ) 実開 昭54−144427（ＪＰ，Ｕ) 実開 昭57−59258（ＪＰ，Ｕ) 特公 平３−10828（ＪＰ，Ｂ２) 特公 昭47−16895（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) F16K 1/226 F16K 27/02 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-11-13898 (JP, A) JP-A-11-148563 (JP, A) JP-A-63-235773 (JP, A) Actual development Sho-54- 144427 (JP, U) Actual development Sho 57-59258 (JP, U) Japanese Patent Publication 3-10828 (JP, B2) Japanese Patent 47-17895 (JP, B1) (58) Fields investigated (Int.Cl. 7 , DB name) F16K 1/226 F16K 27/02
Claims (3)
該弁本体に弁棒を介して回動自在に軸支された剛性材料
からなる円盤状の弁体とからなり、弁体の中心に対して
弁棒を偏心して軸支し、弁体外周縁部及びシートリング
を円錐台形に形成し、該円錐台形の頂点を弁本体長手方
向中心線から偏心させた三重偏心型バタフライ弁におい
て、弁本体にシートリングとシートリング押え部材とを
複数の取付ボルトで着脱自在に仮締結し、配管接続時に
配管フランジで本締結すると共に、弁体外周縁に別体の
シール部材を溶着し、弁体の開弁作動方向下流側外周縁
の前面及び背面の両面に弁体の下流側外周縁に沿って末
広がり状に延びる魚尾状張出部を形成したことを特徴と
するバタフライ弁。1. A valve body having a substantially cylindrical fluid passage provided therethrough,
A disc-shaped valve body made of a rigid material, which is rotatably supported on the valve body via a valve rod, and eccentrically supports the valve rod with respect to the center of the valve body, and an outer peripheral edge portion of the valve body. And seat ring
Is formed in a truncated cone shape, and the apex of the truncated cone is formed in the longitudinal direction of the valve body.
In a triple eccentric butterfly valve that is eccentric from the directional center line , a seat ring and a seat ring retainer are installed on the valve body.
Temporarily removably fastened with multiple mounting bolts for connecting pipes
In addition to the main fastening with the piping flange, a separate seal member is welded to the outer peripheral edge of the valve body, and the outer peripheral edge on the downstream side in the valve opening operation direction of the valve body
On both the front and back sides of the
A butterfly valve characterized by having a fishtail-like overhanging portion that extends in a divergent manner .
出部の高さを、弁棒挿通部分の最大厚み未満とし、かつ
前面側の魚尾状張出部より低くしたことを特徴とする請
求項１記載のバタフライ弁。 2. A fishtail-shaped stretch on the valve rod insertion portion side, which is the back surface of the valve body.
The height of the protruding part should be less than the maximum thickness of the valve rod insertion part, and
A contract characterized by being made lower than the fishtail-shaped overhang on the front side
The butterfly valve according to claim 1.
ットを配設し、流体の外部漏洩を防止したことを特徴と
する請求項１又は２記載のバタフライ弁。3. A butterfly valve according to claim 1, wherein gaskets are arranged at corners of the valve body and the seat pressing member to prevent external leakage of fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18245199A JP3410682B2 (en) | 1999-06-28 | 1999-06-28 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18245199A JP3410682B2 (en) | 1999-06-28 | 1999-06-28 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001012620A JP2001012620A (en) | 2001-01-16 |
| JP3410682B2 true JP3410682B2 (en) | 2003-05-26 |
Family
ID=16118508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18245199A Expired - Fee Related JP3410682B2 (en) | 1999-06-28 | 1999-06-28 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3410682B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777610A (en) * | 2012-07-10 | 2012-11-14 | 博纳斯威阀门有限公司 | Anti-scouring butterfly valve |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8286938B2 (en) | 2005-12-21 | 2012-10-16 | Fisher Controls International Llc | Flexible seals for process control valves |
| KR100978518B1 (en) | 2008-03-06 | 2010-08-27 | 이종철 | The butterfly valve |
| US8857792B2 (en) * | 2012-05-14 | 2014-10-14 | Fisher Controls International Llc | Seal ring assemblies for use with rotary valves |
| JP6158110B2 (en) * | 2014-02-07 | 2017-07-05 | 株式会社オーケーエム | Triple eccentric butterfly valve |
| KR200485757Y1 (en) * | 2017-05-31 | 2018-02-20 | 안준성 | Leakage prevention structure of butterfly valve |
| RU183622U1 (en) * | 2017-10-05 | 2018-09-28 | Акционерное общество "Машиностроительный завод "Армалит" | DISC SHUTTER WITH TRIPLE ECCENTRICITY |
| EP4257853A1 (en) * | 2022-04-04 | 2023-10-11 | MANN+HUMMEL GmbH | Valve for fluid applications |
-
1999
- 1999-06-28 JP JP18245199A patent/JP3410682B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777610A (en) * | 2012-07-10 | 2012-11-14 | 博纳斯威阀门有限公司 | Anti-scouring butterfly valve |
| CN102777610B (en) * | 2012-07-10 | 2013-10-02 | 博纳斯威阀门有限公司 | Anti-scouring butterfly valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001012620A (en) | 2001-01-16 |
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