JPH0223749B2 - - Google Patents
Info
- Publication number
- JPH0223749B2 JPH0223749B2 JP2982182A JP2982182A JPH0223749B2 JP H0223749 B2 JPH0223749 B2 JP H0223749B2 JP 2982182 A JP2982182 A JP 2982182A JP 2982182 A JP2982182 A JP 2982182A JP H0223749 B2 JPH0223749 B2 JP H0223749B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- retainer
- valve body
- annular
- seal
- 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
- 238000007789 sealing Methods 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 239000007769 metal material Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
- F16K1/2266—Shaping or arrangements of the sealing the sealing being arranged on the valve seat and being forced into sealing contact with the valve member by a spring or a spring-like member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Description
【発明の詳細な説明】
(1) 発明の目的
（産業上の利用分野）
この発明は、とくに偏心型バタフライ弁に用い
るに適したシール機構に関するものである。[Detailed Description of the Invention] (1) Object of the Invention (Field of Industrial Application) The present invention relates to a sealing mechanism particularly suitable for use in an eccentric butterfly valve.
（従来技術と解決すべき課題）
弁を回動開閉する弁軸を、通常円板状に形成さ
れた弁板の、周片シール面から外れた位置に配設
した偏心型バタフライ弁は、いつぱんに、流体通
路の一方からの流体圧には良好なシール作用を奏
するが、反対側からの圧力には漏洩を生じやすい
ので、その利用も限定されざるを得なかつた。(Prior art and issues to be solved) An eccentric butterfly valve, in which the valve shaft that rotates the valve to open and close it, is located away from the sealing surface of the peripheral piece of the normally disc-shaped valve plate, In general, although it has a good sealing effect against fluid pressure from one side of the fluid passage, it tends to leak against pressure from the opposite side, so its use has been limited.
このことを、第１図に示す弁（このものは本発
明の実施例を示すものであるが）の、周知構造部
分によつて略示すると、環状弁本体１の内部の流
体通路に、弁軸２によつて、流体通路内で回動自
在に弁板３が配設してあり、その外側縁シール面
３１と、これに対向する弁本体内周面との間に形
成される環状空間に、ゴムなどの弾性材料からな
るシールリングを配設するとともに、前記シール
面を、流体通路の軸線の、弁板よりも下流側の点
に収歛する截頭円錐状に形成してあるのが普通で
ある。 This is schematically illustrated by the well-known structural parts of the valve shown in FIG. 1, which represents an embodiment of the invention. A valve plate 3 is disposed rotatably within the fluid passage by a shaft 2, and an annular space is formed between an outer edge sealing surface 31 of the valve plate 3 and an inner circumferential surface of the valve body opposing thereto. A seal ring made of an elastic material such as rubber is disposed in the valve plate, and the sealing surface is formed in a truncated conical shape converging at a point on the downstream side of the valve plate on the axis of the fluid passage. is normal.
このように形成することによつて、同図矢印Ａ
方向に流体圧がかかつている場合には、シール面
に弁軸が存在しない点と相まつて、きわめて良好
なシール作用を容易に得られるが、矢印Ｂ方向に
圧力がかかる場合には、シール作用が不安定にな
らざるを得ないのである。 By forming in this way, arrow A in the figure
When fluid pressure is applied in the direction of arrow B, an extremely good sealing effect can be easily obtained due to the fact that there is no valve stem on the sealing surface, but when pressure is applied in the direction of arrow B, the sealing effect is cannot help but become unstable.
勿論、流体圧のみが問題であるときには、シー
ル部材たるゴムの特性を適当に定めることによつ
て、上記のような欠点に対応できないことはない
が、処理流体の特性によつては、ゴムなどを使用
することが不可能の場合がある。 Of course, when fluid pressure is the only issue, it is possible to overcome the above drawbacks by appropriately determining the characteristics of the rubber used as the sealing member, but depending on the characteristics of the processing fluid, rubber or other may be impossible to use.
このような場合には、シール部材として金属の
ような耐久性、耐蝕性の大きい材料を利用するこ
とが考えられ、たとえば、特開昭54−67156号公
報、英国特許第1583085号明細書などにも開示さ
れているようなものが提案されてはいるが、金属
は、いつぱんに剛性が大で、流体圧の変化、弁板
の変位に対する追随性も充分とはいえないので、
弁開閉時の回動トルクを過大ならしめることな
く、両方向の流体圧に対応できるようなものは得
られていないのが現状である。 In such a case, it may be possible to use a highly durable and corrosion-resistant material such as metal as the sealing member. However, metals are always very rigid and cannot be said to have sufficient ability to follow changes in fluid pressure and displacement of the valve plate.
Currently, there is no valve that can handle fluid pressure in both directions without excessive rotational torque when opening and closing the valve.
本発明はこのような事態に対処すべくなされた
ものであつて、金属性のシール材を用い、いずれ
の方向からの流体圧に対しても、同様に良好なシ
ール作用が得られるような、偏心型バタフライ弁
のシール機構を提供することを目的とするもので
ある。 The present invention was made to deal with such a situation, and uses a metallic sealing material to provide a similar good sealing effect against fluid pressure from any direction. The object of the present invention is to provide a sealing mechanism for an eccentric butterfly valve.
(2) 発明の構成
（課題を解決する技術手段、その作用）
上記の目的を達成するため、第１の発明におい
ては、環状弁本体と、これに枢着された弁軸と、
板状に形成されていて前記弁本体内部の流体通路
に配設され、その一方の面において前記弁軸に固
着されてこれとともに回動開閉する弁板と、該弁
板からみて弁軸と反対側にある弁本体側面に取着
したリテイナと、弾性金属材料からなつていて、
全体として環状に形成され、半径方向外側に形成
した外側シール部と、内側に形成した内側シール
部と、これら両シール部の間に形成したクツシヨ
ン部をそなえた連結部とからなるシールリングと
を具備しており、前記外側シール部を前記弁本体
側面と前記リテイナによつて保持し、前記内側シ
ール部を弁板外周辺シール面と、これに対向する
弁本体内周面とにそれぞれ当接させ、前記連結部
を前記リテイナ内面に接離揺動自在に当接するよ
うに位置させるとともに、前記弁板外周辺シール
面を、該弁板の弁軸に取着された面から、これと
反対側面にゆくに従つて流体通路中心軸線に接近
するような環状の傾斜面に形成し、前記弁本体内
周面を前記傾斜面と反対方向に傾斜する環状のテ
ーパ部に形成したことを特徴とする偏心型バタフ
ライ弁のシール機構である。(2) Structure of the invention (technical means for solving the problem, its operation) In order to achieve the above object, the first invention includes an annular valve body, a valve shaft pivotally connected to the annular valve body,
a valve plate formed in a plate shape, disposed in the fluid passage inside the valve body, fixed to the valve stem on one side and rotated to open and close together with the valve plate; and a valve plate opposite to the valve stem when viewed from the valve plate. It consists of a retainer attached to the side of the valve body and an elastic metal material.
A seal ring is formed in an annular shape as a whole and is composed of an outer seal part formed on the outside in the radial direction, an inner seal part formed on the inside, and a connecting part with a cushion part formed between these two seal parts. The outer seal portion is held by the side surface of the valve body and the retainer, and the inner seal portion is brought into contact with the outer peripheral seal surface of the valve plate and the inner peripheral surface of the valve body opposing thereto. The connecting portion is positioned so as to be in contact with the inner surface of the retainer so as to be able to swing toward and away from the retainer, and the outer peripheral sealing surface of the valve plate is moved from the surface of the valve plate attached to the valve shaft in the opposite direction. The valve body is formed into an annular inclined surface that approaches the central axis of the fluid passage toward the side surface, and the inner circumferential surface of the valve body is formed into an annular tapered part that is inclined in a direction opposite to the inclined surface. This is an eccentric butterfly valve sealing mechanism.
また、第２の発明は、環状弁本体と、これに枢
着された弁軸と、板状に形成されていて前記弁本
体内部の流体通路に配設され、その一方の面にお
いて前記弁軸に固着されてこれとともに回動開閉
する弁板と、該弁板からみて弁軸と反対側にある
弁本体側面に取着したリテイナと、弾性金属材料
からなつていて、全体として環状に形成され、半
径方向外側に形成した外側シール部と、内側に形
成した内側シール部と、これら両シール部の間に
形成したクツシヨン部をそなえた連結部とからな
るシールリングとを具備しており、前記外側シー
ル部を前記弁本体側面と前記リテイナによつて保
持し、前記内側シール部を弁板外周辺シール面
と、これに対向する弁本体内周面とにそれぞれ当
接させ、前記連結部を前記リテイナ内面に接離揺
動自在に当接するように位置させるとともに、前
記弁板外周辺シール面を、該弁板の弁軸に取着さ
れた面から、これと反対側面にゆくに従つて流体
通路中心軸線に接近するような環状の傾斜面に形
成し、前記弁本体内周面に形成した環状凹所に環
状の補助リングを配設し、前記シールリングの内
側シール部と前記補助リングとの共通接線として
形成される環状面を前記傾斜面と反対方向に傾斜
するように両者を当接させてなることを特徴とす
る偏心型バタフライ弁のシール機構である。 Further, the second invention includes an annular valve body, a valve stem pivotally connected to the annular valve body, and a plate-shaped valve body disposed in a fluid passage inside the valve body, and the valve stem being formed on one surface of the annular valve body. The valve plate is fixed to the valve plate and rotates to open and close together with the valve plate, and the retainer is attached to the side of the valve body on the opposite side of the valve stem when viewed from the valve plate. The retainer is made of an elastic metal material and has an annular shape as a whole. , a seal ring comprising an outer seal portion formed on the outside in the radial direction, an inner seal portion formed on the inside, and a connecting portion having a cushion portion formed between these seal portions; The outer seal portion is held by the side surface of the valve body and the retainer, the inner seal portion is brought into contact with the outer peripheral seal surface of the valve plate and the inner peripheral surface of the valve body opposing thereto, and the connecting portion is held by the retainer. The valve plate is positioned so as to be in contact with the inner surface of the retainer so as to be able to swing toward and away from the retainer, and the outer peripheral sealing surface of the valve plate is moved from the surface of the valve plate attached to the valve shaft toward the opposite side. An annular auxiliary ring is formed in an annular inclined surface approaching the central axis of the fluid passageway, and an annular auxiliary ring is disposed in an annular recess formed on the inner circumferential surface of the valve body, and the inner seal portion of the seal ring and the auxiliary ring A sealing mechanism for an eccentric butterfly valve is characterized in that an annular surface formed as a common tangent to the inclined surface is brought into contact with the inclined surface so as to be inclined in the opposite direction.
このように構成することによつて、特段精密な
加工を要することなく安価に、いずれの方向から
の流体圧に対しても、長期にわたつて所期のシー
ル作用を得ることができ、かつ自動調心作用をも
奏し得る偏心型バタフライ弁に適したシール機構
が得られる。 With this configuration, it is possible to obtain the desired sealing effect over a long period of time against fluid pressure from any direction at low cost without requiring particularly precise machining. A sealing mechanism suitable for an eccentric butterfly valve that can also perform a centering action can be obtained.
（実施例の説明）
第１図は第１の発明によるシール機構をそなえ
た偏心型バタフライ弁の要部側断面図であつて、
環状の弁本体１内流体通路には、該弁本体１の直
径方向対向位置に回動自在に配した弁軸２（図に
はその一方の部分のみが示してある）には弁板３
が取着してあつて、図示の閉成位置と、これから
通常90゜回動した開放位置の間を回動するものと
する。(Description of Embodiments) FIG. 1 is a side cross-sectional view of essential parts of an eccentric butterfly valve equipped with a sealing mechanism according to the first invention,
A valve plate 3 is disposed in the annular fluid passage in the valve body 1, and a valve shaft 2 (only one portion of which is shown in the figure) is rotatably disposed at a position opposite to the valve body 1 in the diametrical direction.
is attached and pivots between the closed position shown and the open position normally rotated by 90 degrees.
弁本体１の一方の側面には、ボルトなど適宜の
手段によつてリテイナ４がこれに固着され、これ
と弁本体との間に、後述するシールリング５を保
持している。 A retainer 4 is fixed to one side of the valve body 1 by appropriate means such as bolts, and a seal ring 5, which will be described later, is held between the retainer 4 and the valve body.
第１図，第２図に示すように、シールリング５
は、適度の弾性をそなえた金属、合成樹脂など、
耐久性、耐蝕性にすぐれた材料から形成されてお
り、その半径方向外側には外側シール部５１が、
内側には内側シール部５２がそれぞれ形成してあ
り、それらの内部には環状のコイルばね５５，５
６が密嵌してある。さらに、これら両シール部５
１および５２の間の連結部５３には、その弾性を
補強するべく、少なくとも１個のクツシヨン部５
４を形成するのがよく、これら各シール部、クツ
シヨン部は同心状に配してあるものとする。 As shown in FIGS. 1 and 2, the seal ring 5
are metals, synthetic resins, etc. with appropriate elasticity,
It is made of a material with excellent durability and corrosion resistance, and has an outer seal portion 51 on the radially outer side thereof.
Inner seal portions 52 are formed on the inside, and annular coil springs 55, 5 are provided inside them.
6 is tightly fitted. Furthermore, both these seal parts 5
1 and 52 is provided with at least one cushion portion 5 to reinforce its elasticity.
4, and these seal portions and cushion portions are arranged concentrically.
図示のように、前記弁板３の周縁シール面３１
は、弁軸２の存在しない側の流体通路の軸線上に
頂点を有する円錐面の一部をなす、截頭円錐面に
形成されており、このシール面３１に対向する弁
本体側内周面には、上記と反対側において、流体
通路の軸線上に頂点を有する円錐面の一部をなす
截頭円錐面に形成されたテーパ面１１となつてい
る。 As shown, the peripheral sealing surface 31 of the valve plate 3
is formed as a truncated conical surface that is a part of a conical surface having its apex on the axis of the fluid passage on the side where the valve stem 2 is not present, and the inner circumferential surface on the valve body side facing this sealing surface 31 On the opposite side to the above, there is a tapered surface 11 formed in a truncated conical surface forming a part of a conical surface having an apex on the axis of the fluid passage.
第１図から判るように、前記シールリング５
は、その外側シール部５１が弁本体１側面とリテ
イナ４との間に強固に保持されており、常態にお
いて、内側シール部５２が前記シール面３１およ
び前記テーパ面１１にゆるく当接し、また、前記
連結部５３の、内側シール部５２に近い部分はリ
テイナ４の半径方向内側面から少許の間〓を有し
て、該内側シール部５２に若干の揺動を許容する
ようになつているものとする。 As can be seen from FIG. 1, the seal ring 5
The outer seal portion 51 is firmly held between the side surface of the valve body 1 and the retainer 4, and the inner seal portion 52 is in loose contact with the seal surface 31 and the tapered surface 11 in the normal state. The portion of the connecting portion 53 close to the inner seal portion 52 has a small distance from the radially inner surface of the retainer 4 to allow the inner seal portion 52 to swing slightly. shall be.
また、前記クツシヨン部５４は、リテイナ４に
形成された環状凹所４１にゆるく嵌合しているも
のとし、この場合、該クツシヨン部５４が図示と
反対側に凸状に形成されているときには、当然の
ことながら上記凹所は不要である。 Further, it is assumed that the cushion portion 54 is loosely fitted into the annular recess 41 formed in the retainer 4, and in this case, when the cushion portion 54 is formed in a convex shape on the side opposite to that shown in the figure, Naturally, the recess described above is unnecessary.
このように構成してあるから、第１図において
矢印Ａ方向から流体圧がかかつているものとする
と、弁板３は図示右方に変位する傾向となり、そ
のシール面３１がシールリング５の内側シール部
５２をリテイナ４の方向に押圧してシール作用が
遂行されることになり、この場合の作用は、公知
のこの種のシール機構によるものと特に変りはな
い。 Because of this structure, if fluid pressure is applied from the direction of arrow A in FIG. The sealing action is performed by pressing the seal portion 52 toward the retainer 4, and the action in this case is not particularly different from that of a known sealing mechanism of this type.
このとき、外側シール部５１が弁本体１とリテ
イナ４との間に保持されているので、圧力流体が
外部へ漏出することはなく、また、内側シール部
５２はクツシヨン部５４を介して支持されている
ので、自動調心作用によつて、該シール部５２と
弁板１のシール面３１との間の少許の偏心は、自
動的に補正されて良好なシール作用を奏すること
ができる。 At this time, since the outer seal part 51 is held between the valve body 1 and the retainer 4, pressure fluid does not leak to the outside, and the inner seal part 52 is supported via the cushion part 54. Therefore, due to the self-aligning action, a slight eccentricity between the seal portion 52 and the sealing surface 31 of the valve plate 1 is automatically corrected, and a good sealing action can be achieved.
流体圧が、第１図矢印Ｂ方向からかかる場合に
ついて考える。 Consider the case where fluid pressure is applied from the direction of arrow B in FIG.
第３図は、第１図の内側シール部近傍の部分の
みを示す拡大図であつて、コイルばね５６は省略
してある。 FIG. 3 is an enlarged view showing only the portion near the inner seal portion of FIG. 1, and the coil spring 56 is omitted.
矢印Ｂ方向に流体圧がかかると、シール部５２
は図示左方に変位傾向となつて弁本体のテーパ面
１１に圧接する。このときの力の反力Ｐは、流体
圧の方向の力Ｒと、シール面３１を押圧する方向
の力Ｑに分解できることになるが、力Ｒはリテイ
ナへ当接することによつて補償されるので、内側
シール部５２は、力Ｑによつてその方向にたわん
で惰円形に変形傾向となる。 When fluid pressure is applied in the direction of arrow B, the seal portion 52
tends to be displaced leftward in the figure and comes into pressure contact with the tapered surface 11 of the valve body. The reaction force P at this time can be decomposed into a force R in the direction of the fluid pressure and a force Q in the direction of pressing the sealing surface 31, but the force R is compensated by contacting the retainer. Therefore, the inner seal portion 52 tends to bend in that direction due to the force Q and deform into a circular shape.
上記の作用と、前述のように、連結部５３の内
端縁に形成した可変位の内側シール部５２によつ
て、流体圧によつて図示左方に変位する弁板３の
シール面３１に内側シール部５２が追随密着して
シール作用を奏することになる。 Due to the above action and the variable inner seal portion 52 formed on the inner edge of the connecting portion 53, as described above, the sealing surface 31 of the valve plate 3, which is displaced leftward in the figure by fluid pressure, is The inner seal portion 52 follows closely and performs a sealing action.
この場合、常態において、断面ほぼ円形に形成
されて弁板シール面３１に当接する内側シール部
５２の、該当接部における直径方向（第１図の直
線Ｃ方向）に、前記の力Ｑを一致させることによ
つて最も効果的にシール作用を奏せしめることが
でき、このことは、テーパ面１１の傾き、リテイ
ナ４の位置を適当に定めることによつて可能であ
ることは容易に理解できることであろう。 In this case, under normal conditions, the force Q is applied in the diametrical direction (direction of straight line C in FIG. 1) of the inner seal portion 52, which is formed into a substantially circular cross section and contacts the valve plate seal surface 31, at the corresponding contact portion. It is easy to understand that this is possible by appropriately determining the inclination of the tapered surface 11 and the position of the retainer 4. Probably.
第４図は第２の発明の実施例を示すものであつ
て、とくにそのシールリングの近傍部分のみを示
す断面図であり、前記第１図のものと対応する部
分には同一の符合を付して示してあり、それらに
ついての説明はとくに必要のない限り省略する
このものにおいては、弁本体１とリテイナ４に
保持されている、シールリング５の内側シール部
５２は、弁板３のシール面３１に当接するととも
に、弁本体に形成した環状凹所１２に配設した補
助リング６に当接するように構成してある。 FIG. 4 shows an embodiment of the second invention, and is a sectional view showing only the vicinity of the seal ring, and parts corresponding to those in FIG. 1 are given the same reference numerals. In this device, the inner seal portion 52 of the seal ring 5 held by the valve body 1 and retainer 4 is the seal of the valve plate 3. It is configured to abut against the surface 31 as well as an auxiliary ring 6 disposed in an annular recess 12 formed in the valve body.
該補助リング６は、適度の弾性を有する金属か
らなる中空状のリング部材の内部に、コイルばね
６１を密嵌してなり、前記内側シール部５２と図
示のように接触し、その直径、前記環状凹所１２
の位置、形状などを適当に定めて、内側シール部
５２と補助リング６の共通接線Ｐの向きが、前述
の実施例におけるテーパ面１１と同様の截頭円錐
面で、かつ該テーパ面とは反対方向に収歛する様
に構成してある。 The auxiliary ring 6 is formed by tightly fitting a coil spring 61 inside a hollow ring member made of a metal having appropriate elasticity, contacts the inner seal portion 52 as shown in the figure, and has a diameter of Annular recess 12
By appropriately determining the position, shape, etc. of It is constructed so that it converges in the opposite direction.
このように構成することによつて、前述の矢印
Ｂ方向の一定流体圧に対して、内側シール部５２
が直接剛性材料たる弁本体テーパ面に当接しない
ので、その変形量が少なくてすみ、耐久性を増大
することができる。 With this configuration, the inner seal portion 52
Since the valve body does not come into direct contact with the tapered surface of the valve body, which is a rigid material, the amount of deformation can be reduced, and durability can be increased.
以上説明した実施例においては、弁板外周辺シ
ール面３１が截頭円錐面に形成されたものについ
て述べたが、該面がこれに限定されるものではな
く、球面の一部、トーリツク（toric）面など、
前述の第３図に示した力Ｑが発生するような種々
な曲面を利用できるものであることは容易に理解
できることであろう。 In the embodiments described above, the valve plate outer peripheral sealing surface 31 is formed as a truncated conical surface, but the surface is not limited to this, and may be a part of a spherical surface, a toric (toric) surface, etc. ) faces, etc.
It will be easily understood that various curved surfaces can be used to generate the force Q shown in FIG. 3 above.
また、シールリング５、補助リング６に配設し
たコイルばね、連結部５３に形成したクツシヨン
部は、該シールリング、補助リング自体の弾性を
適当に定めることにより、処理流体の流体圧、要
求されるシール作用の程度などによつては、必ず
しも必須ではない。 In addition, the coil springs disposed in the seal ring 5 and the auxiliary ring 6 and the cushion part formed in the connecting part 53 can be adjusted to meet the fluid pressure of the processing fluid by appropriately determining the elasticity of the seal ring and the auxiliary ring themselves. This is not necessarily required depending on the degree of sealing effect.
(3) 発明の効果
以上説述したように、第１，第２の発明による
ときは、偏心型バタフライ弁において、処理流体
の流体圧が弁板のいずれの側からかかつても同様
に良好なシール作用が得られ、シール部材たるシ
ールリングが弁板に対して自動調心作用を有する
ので、加工組立が容易でコストダウンに資すると
ころ大であり、さらに、シールリングの実際にシ
ール作用を実行する部分が変位可能に配設されて
いて、弁開閉時にも弁板がシールリングを容易に
乗り越えられるので、開閉のための回動トルクを
とくに増大することがなく、長期にわたつて安定
したシール機能を維持でき、とくに、第２の発明
によるときは、直接シール作用を奏する内側シー
ル部の変形を小さくできるので、耐久性の増大が
顕著であり、この種の弁の適用範囲を飛躍的に増
大することができる。(3) Effects of the invention As explained above, according to the first and second inventions, in the eccentric butterfly valve, the fluid pressure of the processing fluid can be maintained at the same level from either side of the valve plate. Since the seal ring, which is the sealing member, has a self-aligning action with respect to the valve plate, it is easy to process and assemble, which greatly contributes to cost reduction.Furthermore, the seal ring actually performs the sealing action. The valve plate is displaceable and the valve plate can easily overcome the seal ring when opening and closing the valve, so the rotational torque for opening and closing the valve does not need to be increased, resulting in a stable seal over a long period of time. The function can be maintained, and especially when the second invention is used, the deformation of the inner seal part that performs a direct sealing action can be reduced, so the durability is significantly increased, and the range of application of this type of valve is dramatically expanded. can be increased.
第１図は第１の発明の実施例を示すバタフライ
弁の要部断面図、第２図は同上のシールリングの
一部切截斜面図、第３図は同上のシールリングの
シール作用を説明するための説明図、第４図は第
２の発明の実施例を示すバタフライ弁の要部断面
図である。
１…弁本体、２…弁軸、３…弁板、４…リテイ
ナ、５…シールリング、６…補助リング、１１…
テーパ部、３１…シール面、５１…外側シール
部、５２…内側シール部、５３…連結部、５４…
クツシヨン部。
Fig. 1 is a cross-sectional view of the essential parts of a butterfly valve showing an embodiment of the first invention, Fig. 2 is a partially cutaway oblique view of the seal ring shown above, and Fig. 3 explains the sealing action of the seal ring shown above. FIG. 4 is a sectional view of a main part of a butterfly valve showing an embodiment of the second invention. DESCRIPTION OF SYMBOLS 1... Valve body, 2... Valve shaft, 3... Valve plate, 4... Retainer, 5... Seal ring, 6... Auxiliary ring, 11...
Tapered part, 31... Seal surface, 51... Outer seal part, 52... Inner seal part, 53... Connecting part, 54...
Cushion department.
Claims (1)
路に配設され、その一方の面において前記弁軸に
固着されてこれとともに回動開閉する弁板と、 該弁板からみて弁軸と反対側にある弁本体側面
に取着したリテイナと、 弾性金属材料からなつていて、全体として環状
に形成され、半径方向外側に形成した外側シール
部と、内側に形成した内側シール部と、これら両
シール部の間に形成されたクツシヨン部をそなえ
た連結部とからなるシールリングとを具備してお
り、 前記外側シール部を前記弁本体側面と前記リテ
イナによつて保持し、前記内側シール部を弁板外
周辺シール面と、これに対向する弁本体内周面と
にそれぞれ当接させ、前記連結部を前記リテイナ
内面に接離揺動自在に当接するように位置させる
とともに、 前記弁板外周辺シール面を、該弁板の弁軸に取
着された面から、これと反対側面にゆくに従つて
流体通路中心軸線に接近するような環状の傾斜面
に形成し、 前記弁本体内周面を前記傾斜面と反対方向に傾
斜する環状のテーパ部に形成してなる偏心型バタ
フライ弁のシール機構。 ２ 弁板外周辺シール面を截頭円錐面に形成した
特許請求の範囲第１項記載の偏心型バタフライ弁
のシール機構。 ３ 環状弁本体と、 これに枢着された弁軸と、 板状に形成されていて前記弁本体内部の流体通
路に配設され、その一方の面において前記弁軸に
固着されてこれとともに回動開閉する弁板と、 該弁板からみて弁軸と反対側にある弁本体側面
に取着したリテイナと、 弾性金属材料からなつていて、全体として環状
に形成され、半径方向外側に形成した外側シール
部と、内側に形成した内側シール部と、これら両
シール部の間に形成したクツシヨン部をそなえた
連結部とからなるシールリングとを具備してお
り、 前記外側シール部を前記弁本体側面と前記リテ
イナによつて保持し、前記内側シール部を弁板外
周辺シール面と、これに対向する弁本体内周面と
にそれぞれ当接させ、前記連結部を前記リテイナ
内面に接離揺動自在に当接するように位置させる
とともに、 前記弁板外周辺シール面を、該弁板の弁軸に取
着された面から、これと反対側面にゆくに従つて
流体通路中心軸線に接近するような環状の傾斜面
に形成し、 前記弁本体内周面に形成した環状凹所に環状の
補助リングを配設し、前記シールリングの内側シ
ール部と前記補助リングとの共通接線として形成
される環状面を前記傾斜面と反対方向に傾斜する
ように両者を当接させてなる偏心型バタフライ弁
のシール機構。 ４ 弁板外周辺シール面を截頭円錐面に形成した
特許請求の範囲第３項記載の偏心型バタフライ弁
のシール機構。[Scope of Claims] 1. An annular valve body, a valve stem pivotally connected to the valve body, and a plate-shaped valve body disposed in a fluid passage inside the valve body, with one surface of the valve stem being connected to the valve stem. A valve plate that is fixed to the valve plate and rotates to open and close together with the valve plate; a retainer that is attached to the side of the valve body on the opposite side of the valve stem when viewed from the valve plate; and a retainer that is made of an elastic metal material and has an annular shape as a whole. The seal ring includes an outer seal portion formed on the outer side in the radial direction, an inner seal portion formed on the inner side, and a connecting portion having a cushion portion formed between these two seal portions, The outer seal portion is held by the side surface of the valve body and the retainer, the inner seal portion is brought into contact with the outer peripheral seal surface of the valve plate and the inner peripheral surface of the valve body opposing thereto, and the connecting portion is held by the retainer. The retainer is positioned so as to be in contact with the inner surface of the retainer so as to be able to swing toward and away from the retainer, and the outer peripheral sealing surface of the valve plate is positioned from the surface of the valve plate attached to the valve shaft toward the opposite side. A sealing mechanism for an eccentric butterfly valve, comprising: an annular inclined surface approaching a central axis of a fluid passage; and an inner circumferential surface of the valve body formed into an annular tapered portion inclined in a direction opposite to the inclined surface. 2. A sealing mechanism for an eccentric butterfly valve according to claim 1, wherein the outer peripheral sealing surface of the valve plate is formed into a truncated conical surface. 3 an annular valve body; a valve stem pivotally attached to the annular valve body; It consists of a valve plate that opens and closes dynamically, a retainer attached to the side of the valve body on the opposite side of the valve stem when viewed from the valve plate, and a retainer made of an elastic metal material, formed in an annular shape as a whole, and a retainer formed on the outside in the radial direction. The seal ring includes an outer seal part, an inner seal part formed on the inside, and a connecting part having a cushion part formed between these two seal parts, and the outer seal part is connected to the valve body. The inner seal portion is held by the side surface and the retainer, and the inner seal portion is brought into contact with the outer peripheral seal surface of the valve plate and the inner peripheral surface of the valve body opposing thereto, and the connecting portion is moved toward and away from the inner surface of the retainer. The outer peripheral sealing surface of the valve plate approaches the central axis of the fluid passage from the surface of the valve plate attached to the valve shaft toward the opposite side. an annular auxiliary ring is disposed in an annular recess formed in the inner circumferential surface of the valve body, and the annular auxiliary ring is formed as a common tangent between the inner seal portion of the seal ring and the auxiliary ring. A sealing mechanism for an eccentric butterfly valve, in which an annular surface is brought into contact with the inclined surface so that the annular surface is inclined in the opposite direction to the inclined surface. 4. A sealing mechanism for an eccentric butterfly valve according to claim 3, wherein the outer peripheral sealing surface of the valve plate is formed into a truncated conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2982182A JPS58149474A (en) | 1982-02-27 | 1982-02-27 | Sealing mechanism for eccentric-type butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2982182A JPS58149474A (en) | 1982-02-27 | 1982-02-27 | Sealing mechanism for eccentric-type butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58149474A JPS58149474A (en) | 1983-09-05 |
| JPH0223749B2 true JPH0223749B2 (en) | 1990-05-25 |
Family
ID=12286683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2982182A Granted JPS58149474A (en) | 1982-02-27 | 1982-02-27 | Sealing mechanism for eccentric-type butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58149474A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102985728A (en) * | 2010-05-11 | 2013-03-20 | Ksb有限公司 | Faucet having a metal gasket |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2566870B1 (en) * | 1984-06-28 | 1986-11-28 | Amri | SEALING DEVICE FOR PROVIDING UPSTREAM / DOWNSTREAM SEALING OF A SHUTTER |
| CN105221766B (en) * | 2015-11-09 | 2017-06-23 | 宁波一机阀门制造有限公司 | A kind of butterfly valve with hydraulic sealing structure |
| CN106151543A (en) * | 2016-07-22 | 2016-11-23 | 苏州纽威阀门股份有限公司 | A kind of hard seal butterfly valve |
-
1982
- 1982-02-27 JP JP2982182A patent/JPS58149474A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102985728A (en) * | 2010-05-11 | 2013-03-20 | Ksb有限公司 | Faucet having a metal gasket |
| CN102985728B (en) * | 2010-05-11 | 2014-10-01 | Ksb有限公司 | Faucet having a metal gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58149474A (en) | 1983-09-05 |
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