JPH0147672B2 - - Google Patents

Info

Publication number
JPH0147672B2
JPH0147672B2 JP21336082A JP21336082A JPH0147672B2 JP H0147672 B2 JPH0147672 B2 JP H0147672B2 JP 21336082 A JP21336082 A JP 21336082A JP 21336082 A JP21336082 A JP 21336082A JP H0147672 B2 JPH0147672 B2 JP H0147672B2
Authority
JP
Japan
Prior art keywords
valve
case
shaft
seat ring
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
Application number
JP21336082A
Other languages
Japanese (ja)
Other versions
JPS59106765A (en
Inventor
Mikima Nakanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tomoe Technical Research Co Ltd
Original Assignee
Tomoe Technical Research Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tomoe Technical Research Co Ltd filed Critical Tomoe Technical Research Co Ltd
Priority to JP21336082A priority Critical patent/JPS59106765A/en
Publication of JPS59106765A publication Critical patent/JPS59106765A/en
Publication of JPH0147672B2 publication Critical patent/JPH0147672B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/16Lift 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
    • F16K1/18Lift 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
    • F16K1/22Lift 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
    • F16K1/226Shaping or arrangements of the sealing
    • F16K1/2268Sealing means for the axis of rotation

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、環状弁本体内周面に弾性シートリ
ングを装着し、その内部に配設した弁板の弁軸
を、上記シートリング、弁本体を貫通して外方に
突出配置した中心型バタフライ弁の該弁軸方向の
軸封装置に関するものである。
[Detailed Description of the Invention] (1) Purpose of the Invention (Field of Industrial Application) This invention has an elastic seat ring attached to the inner peripheral surface of an annular valve body, and a valve shaft of a valve plate disposed inside the elastic seat ring. The present invention relates to a shaft sealing device for a central butterfly valve in which the seat ring and the valve body are protruded outwardly through the valve body.

(従来技術と解決すべき課題) 上記のような軸封装置について、たとえば、実
公昭52−3699号に開示されたものを、第1図によ
つて略述する。
(Prior Art and Problems to be Solved) A shaft sealing device as described above, for example, disclosed in Japanese Utility Model Publication No. 52-3699, will be briefly described with reference to FIG.

第1図は中心型バタフライ弁の、弁軸近傍の部
分を示す断面図であつて、環状の弁本体1の内周
面に弾性シートリング3を装着し、その内部流体
通路に弁本体2が配設してある。
FIG. 1 is a sectional view showing a portion near the valve shaft of a central butterfly valve, in which an elastic seat ring 3 is attached to the inner peripheral surface of an annular valve body 1, and a valve body 2 is installed in the internal fluid passage. It is arranged.

該弁板2の直径方向対向位置には弁軸4が配設
され(図にはその一方のみが示してある)、この
弁軸4が前記シートリング、弁本体を貫通して弁
板を所定位置に支持している。
A valve stem 4 is disposed at a position facing the valve plate 2 in the diametrical direction (only one of them is shown in the figure), and this valve stem 4 passes through the seat ring and the valve body to fix the valve plate in a predetermined position. Support in position.

弁軸4がシートリングに囲繞されている部分に
は、両者の接触面から内部の流体が漏洩するのを
阻止するため、半径方向断面がほぼコの字状に形
成され、金属、硬質プラスチツク等からなる環状
のO−リングケース5aが配設され、その内部の
O−リング5bが前記弁軸4に圧接して配置して
あつて、弁軸4の周囲からの流体の漏洩を阻止し
ている。
In order to prevent internal fluid from leaking from the contact surface between the valve stem 4 and the seat ring, the section in the radial direction is formed into a substantially U-shape, and is made of metal, hard plastic, etc. An annular O-ring case 5a is provided, and an O-ring 5b inside the case is placed in pressure contact with the valve shaft 4 to prevent fluid from leaking around the valve shaft 4. There is.

このような構成においては、前記O−リングケ
ース5aを所定位置に固定するために、通常ゴム
で構成されているシートリングを成型するさい
に、金型内の定位置にO−リングケースを支持す
るときに該ケースの外側に接着剤を塗布するが、
このとき、完成してから接着剤がケース内部のO
−リングが位置する部分にまで存在するのは不都
合であるから、液状の接着剤中にケース5aをヂ
ヤブ漬けして接着剤を塗布することは事実上不可
能で、接着剤がケース内部に至らないように、手
作業で外表面のみに塗布する必要があり、非能率
たるを免れなかつた。
In such a configuration, in order to fix the O-ring case 5a in a predetermined position, the O-ring case is supported at a fixed position in the mold when molding the seat ring, which is usually made of rubber. When applying adhesive to the outside of the case,
At this time, after completion, the adhesive will be inside the case.
- Since it is inconvenient for the ring to be present in the area where the ring is located, it is virtually impossible to soak the case 5a in liquid adhesive and apply the adhesive, and the adhesive does not reach the inside of the case. It was necessary to manually apply it only to the outer surface to prevent it from occurring, which was inevitably inefficient.

さらに、前記O−リングケースを金型に装着し
てからゴムを注入する場合、該ケース内側開放端
縁と金型外面との間には若干の間〓があり、一方
ゴムの注入圧は150Kg/cm2程度と大きいので、上
記の間〓からケース内部にゴム材が侵入するのを
阻止することができず、完成後、このバリ状のゴ
ムをいちいち手作業で除去する必要がある。
Furthermore, when rubber is injected after the O-ring case is attached to the mold, there is a slight gap between the inner open edge of the case and the outer surface of the mold, and the rubber injection pressure is 150 kg. Since the rubber material is large, about 2 cm2, it is impossible to prevent the rubber material from entering the case from the above-mentioned gap, and after completion, it is necessary to manually remove this burr-shaped rubber one by one.

このように、上記のようなシール機構は、構成
が簡単でシール作用も優れてはいるが、その製作
には手間がかかり、コストアツプを免れなかつ
た。
As described above, although the above-mentioned sealing mechanism has a simple structure and an excellent sealing effect, it takes time and effort to manufacture it, which inevitably increases costs.

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、中心型のバタフライ弁における弁
軸方向のシールを、規制のO−リングを使用する
ことなく、シートリングを構成するゴム材を、通
常のO−リングケースに相当する環状のシールケ
ース内部に充填してO−リングと同様の作用を奏
するようにして、この種のシール機構の利点を維
持しながら、製作が容易で、安価な軸封装置を提
供することを目的とするものである。
The present invention was made to deal with this situation, and it is possible to seal the central butterfly valve in the valve axis direction by using the rubber material that makes up the seat ring, without using a restrictive O-ring. By filling the inside of an annular seal case, which corresponds to a normal O-ring case, to perform the same function as an O-ring, it is easy to manufacture and inexpensive while maintaining the advantages of this type of seal mechanism. The object of the present invention is to provide a shaft sealing device that provides a reliable shaft sealing device.

(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、本発明は、内部に
流体通路を形成した弁本体と、該流体通路内にあ
つて直径方向対向位置に前記弁本体を貫通する方
向に延びる弁軸を具有する弁板とを備え、前記弁
本体内周面と前記弁板外周面との間の環状空所に
有弾性のゴムからなり、前記弁軸が貫通するシー
トリングを配設したバタフライ弁において、前記
弁軸を囲繞するシートリング部分に、該弁軸を囲
繞するシールケース外面を接着配設するととも
に、前記シールケース内部に、少許の間〓を存し
てシールケース外のゴム材と連通し、弁軸に対向
する側においてこれに圧接する環状突部をそなえ
た軸封シール部を前記シールケースに接着してな
ることを特徴とするものである。
(2) Structure of the invention (technical means for solving the problem and its operation) In order to achieve the above object, the present invention provides a valve body having a fluid passage therein, and a valve body that is diametrically opposed within the fluid passage. a valve plate having a valve shaft extending in a direction penetrating the valve body; the annular space between the inner circumferential surface of the valve body and the outer circumferential surface of the valve plate is made of elastic rubber; In a butterfly valve having a seat ring through which the valve stem passes, the outer surface of a seal case surrounding the valve stem is bonded to the seat ring portion surrounding the valve stem, and a small amount of A shaft seal part is bonded to the seal case, and has an annular protrusion that communicates with a rubber material outside the seal case through a gap and presses against the valve stem on the side opposite to the valve stem. It is something to do.

このように構成することによつて、構成が簡単
で手作業を極力排除でき、量産に適する中心型バ
タフライ弁の軸封装置を得ることができる。
With this configuration, it is possible to obtain a shaft sealing device for a central butterfly valve that is simple in configuration, eliminates manual labor as much as possible, and is suitable for mass production.

(実施例の説明) 第3図は本発明によるシートリングの斜面図で
あつて、周辺に立ち上がりリブをそなえ、中央に
弁軸が挿通されるべき孔8を有する環状のシール
ケース7において、該孔8の周辺に適数の切欠8
aを形成してある。
(Description of Embodiments) FIG. 3 is a perspective view of a seat ring according to the present invention, in which an annular seal case 7 is provided with rising ribs on the periphery and has a hole 8 in the center through which a valve stem is inserted. Appropriate number of notches 8 around hole 8
A is formed.

第2図はシートリングを成型する金型の要部断
面図で、M1,M2は金型で、シートリングの弁軸
挿通孔に相当する位置には符号9で示すように金
型が配設され、該金型9の所定位置、図示の場合
には、一方の縁が、弁組立時に弁本体内周面に一
致するように環状凹所9aを形成し、これに対向
するように、内外面に接着剤を塗布したシールケ
ース7を予め配設しておくものとする。
Figure 2 is a sectional view of the main parts of the mold for molding the seat ring, M 1 and M 2 are the molds, and the mold is located at the position corresponding to the valve shaft insertion hole of the seat ring as shown by 9. At a predetermined position of the mold 9, in the illustrated case, one edge forms an annular recess 9a so as to coincide with the inner circumferential surface of the valve body during valve assembly, and is opposed to the annular recess 9a. , a seal case 7 whose inner and outer surfaces are coated with adhesive is provided in advance.

このように型を配置したところへゴムを注入す
ると、同図に符号3で示すように、ゴムが充填さ
れてシートリングが形成されるとともに、前記切
欠8aからゴムがシールケース7の内部にも侵入
して内部スペースを充満し、軸封シール部3aが
形成されることになる。
When rubber is injected into the place where the mold is arranged in this way, the rubber is filled and a seat ring is formed, as shown by reference numeral 3 in the figure, and the rubber also flows into the inside of the seal case 7 from the notch 8a. It invades and fills the internal space, forming the shaft seal portion 3a.

以上のように構成したシートリングを、第1図
図示のような、周知の中心型バタフライ弁に装着
すると、シールケース7内の軸封シール部3aの
内側の突部が弁軸に圧接し、また該シール部3a
はその周辺を、シールケース7の内面および弁本
体の内周面に囲繞された状態となるので、O−リ
ングと同様に作用して、弁軸周面における流体の
漏洩を阻止することになる。
When the seat ring configured as described above is attached to a well-known central type butterfly valve as shown in FIG. Also, the seal portion 3a
Since it is surrounded by the inner surface of the seal case 7 and the inner peripheral surface of the valve body, it acts in the same way as an O-ring to prevent fluid leakage on the peripheral surface of the valve shaft. .

このように構成してあるから、シールケースに
とくにO−リングを別に装着する必要がなく、シ
ールケースはその全面に接着剤を塗布することが
可能であるからシートリングの製作が安価かつ容
易になるばかりでなく、内部にある軸封シール部
3aがみだりに移動しないので、安定したシール
機能を奏することができ、さらに、シートリング
を構成するゴム材が、製作時に、不要のバリとな
つて残ることがないので、この点もコスト的に有
利である。
With this structure, there is no need to separately attach an O-ring to the seal case, and adhesive can be applied to the entire surface of the seal case, making the production of the seat ring inexpensive and easy. Not only that, but the internal shaft seal part 3a does not move unnecessarily, so it can perform a stable sealing function, and the rubber material that makes up the seat ring does not remain as unnecessary burrs during manufacturing. This point is also advantageous in terms of cost.

さらに、図示のような位置にシール作用をする
軸封シール部3aを形成することによつて、この
部分のシール作用が減退した場合には、この部分
を除去し、新しいO−リングを配することによつ
て再使用出来るので好適である。
Furthermore, by forming the shaft sealing part 3a that performs a sealing action at the position shown in the figure, if the sealing action of this part is reduced, this part is removed and a new O-ring is placed. This is preferable because it can be reused.

図示の実施態様においては、シールケース7を
シートリングの最外側近傍に配置して、シール作
用を奏する軸封シール部を囲繞する剛性部材の一
部を弁本体の内周面で担持するようにしたが、こ
のシール部分が、弁軸軸線方向に見て第1図々示
のような弁体内周面と弁板外周面との間に設ける
ことも可能であることは勿論である。
In the illustrated embodiment, the seal case 7 is disposed near the outermost side of the seat ring, so that a part of the rigid member surrounding the shaft seal portion that performs the sealing action is supported on the inner circumferential surface of the valve body. However, it is of course possible to provide this seal portion between the valve body circumferential surface and the valve plate outer circumferential surface as shown in FIG. 1 when viewed in the axial direction of the valve shaft.

このように構成する場合には、シールケースは
前述のように周囲に立ち上がり部を有する、前述
のような構成ではなく、公知のO−リングケース
のように、半径方向断面で見て弁軸に対向する部
分以外の3方向に剛性材料の部分が存在するよう
に構成する必要があることは論を待たない。
When configured in this way, the seal case does not have the above-mentioned configuration with a rising portion around the periphery, but instead has a structure similar to the valve stem when viewed in radial cross section, like a known O-ring case. It goes without saying that it is necessary to configure the structure so that there are parts of rigid material in three directions other than the opposing parts.

(3) 発明の効果 以上説明したように、本発明によるときは、中
心型バタフライ弁の軸封装置において、弁軸を囲
繞するシールケースを、その全面にわたつて周囲
のゴム部と接着することが出来、シール作用を奏
する軸封シール部まわりに、バリ状の不要なゴム
材が不規則に発生するようなことがないから、製
作が容易でコスト的にも極めて有利であり、量産
にも適する。
(3) Effects of the Invention As explained above, according to the present invention, in the shaft sealing device for a central butterfly valve, the seal case surrounding the valve shaft can be bonded to the surrounding rubber portion over the entire surface thereof. Since unnecessary rubber material in the form of burrs does not occur irregularly around the shaft seal that performs the sealing action, it is easy to manufacture and extremely cost-effective, making it suitable for mass production. Suitable.

また、シール作用を奏するべき、シールケース
内部に位置するゴム部分を固定することが出来る
ので、従来公知の、別設のO−リングを用いるも
のに比して、シール部が組み立てに際して不規則
に変位、移動することがなく、全周にわたつて均
一のシールを得るのに、調整をほとんど必要とす
るようなことがなので、調整作業の向上をはかる
ことができる。
In addition, since the rubber part located inside the seal case that is supposed to perform the sealing action can be fixed, the seal part does not come out irregularly during assembly, compared to conventionally known systems that use a separate O-ring. There is no displacement or movement, and little adjustment is required to obtain a uniform seal around the entire circumference, which improves the adjustment work.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は公知の軸封装置の構成を示す要部の断
面図、第2図は本発明によるシートリングを構成
する手段を示す要部の断面図、第3図はシールケ
ースの構成を示す斜面図である。 1……弁本体、2……弁板、3……シートリン
グ、7……シールケース、8……弁軸貫通孔。
FIG. 1 is a cross-sectional view of the main parts showing the configuration of a known shaft seal device, FIG. 2 is a cross-sectional view of the main parts showing the means for configuring the seat ring according to the present invention, and FIG. 3 is a cross-sectional view of the main parts showing the structure of the seal case. It is a slope view. 1... Valve body, 2... Valve plate, 3... Seat ring, 7... Seal case, 8... Valve shaft through hole.

Claims (1)

【特許請求の範囲】 1 内部に流体通路を形成した弁本体と、該流体
通路内にあつて直径方向対向位置に前記弁本体を
貫通する方向に延びる弁軸を具有する弁板とを備
え、前記弁本体内周面と前記弁板外周面との間の
環状空所に有弾性のゴムからなり、前記弁軸が貫
通するシートリングを配設したバタフライ弁にお
いて、 前記弁軸を囲繞するシートリング部分に、該弁
軸を囲繞するシールケース外面を接着配設すると
ともに、前記シールケース内部に、少許の間〓を
存してシールケース外のゴム材と連通し、弁軸に
対向する側においてこれに圧接する環状突部をそ
なえた軸封シール部を前記シールケースに接着し
て成る中心型バタフライ弁の軸封装置。
[Scope of Claims] 1. A valve body having a fluid passage formed therein, and a valve plate having a valve shaft located within the fluid passage and diametrically opposed to each other and extending in a direction passing through the valve body, In a butterfly valve, a seat ring made of elastic rubber is disposed in an annular space between the inner circumferential surface of the valve body and the outer circumferential surface of the valve plate, and the seat ring is penetrated by the valve stem, the seat surrounding the valve stem. The outer surface of the seal case surrounding the valve stem is adhesively disposed on the ring portion, and a side facing the valve stem is provided inside the seal case, communicating with the rubber material outside the seal case with a slight gap. A shaft sealing device for a central butterfly valve, which comprises a shaft sealing portion having an annular protrusion that presses against the shaft sealing portion and bonding the sealing case to the sealing case.
JP21336082A 1982-12-07 1982-12-07 Shaft sealing mechanism of center type butterfly valve and method of producing same Granted JPS59106765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21336082A JPS59106765A (en) 1982-12-07 1982-12-07 Shaft sealing mechanism of center type butterfly valve and method of producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21336082A JPS59106765A (en) 1982-12-07 1982-12-07 Shaft sealing mechanism of center type butterfly valve and method of producing same

Publications (2)

Publication Number Publication Date
JPS59106765A JPS59106765A (en) 1984-06-20
JPH0147672B2 true JPH0147672B2 (en) 1989-10-16

Family

ID=16637881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21336082A Granted JPS59106765A (en) 1982-12-07 1982-12-07 Shaft sealing mechanism of center type butterfly valve and method of producing same

Country Status (1)

Country Link
JP (1) JPS59106765A (en)

Also Published As

Publication number Publication date
JPS59106765A (en) 1984-06-20

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