JPS6367469A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPS6367469A JPS6367469A JP21365586A JP21365586A JPS6367469A JP S6367469 A JPS6367469 A JP S6367469A JP 21365586 A JP21365586 A JP 21365586A JP 21365586 A JP21365586 A JP 21365586A JP S6367469 A JPS6367469 A JP S6367469A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve stem
- bush
- purge fluid
- valve body
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 52
- 238000010926 purge Methods 0.000 claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高温流体を扱うバタフライ弁に関し、詳しく
は、弁体を連結した回転弁棒とそれを支承する弁箱の筒
状軸受部との間において、前記弁棒に対して相対回転自
在に外嵌したブツシュを、その端面を前記弁体に接触さ
せる状態で設け、もって、弁棒における弁体連結部近く
が取扱い流体に直接に晒されることをブツシュで防止し
て弁棒の保護を図り、一方、前記弁棒とブツシュとの間
に対してパージ流体を供給するパージ流体供給路を前記
筒状軸受部に接続したバタフライ弁に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a butterfly valve that handles high-temperature fluid, and more specifically, a rotary valve stem connected to a valve body, a cylindrical bearing portion of a valve body supporting the stem, and A bushing is provided between the valve stem and the bushing, which is fitted around the valve stem so as to be rotatable relative to the valve stem, with its end surface in contact with the valve body, so that the vicinity of the valve body connecting portion of the valve stem is directly exposed to the handled fluid. The present invention relates to a butterfly valve in which the valve stem is protected by a bushing, and a purge fluid supply path for supplying purge fluid between the valve stem and the bush is connected to the cylindrical bearing part.
従来、上記の如きバタフライ弁においては、筒状軸受部
側から供給したパージ流体を単に弁棒とブツシュとの間
を介して弁体連結側に流動させるだけの構造となってい
た（例えば、特願昭６０−１４６９２６号参照）。Conventionally, butterfly valves such as those described above have a structure in which the purge fluid supplied from the cylindrical bearing side is simply made to flow to the valve body connection side via between the valve stem and bushing (for example, (See Application No. 60-146926).
しかし、ブツシュの弁棒保護機能を確実に仕様としてブ
ツシュの端面を弁体に接触させる構成となっているため
に、弁棒とブツシュとの間を弁体連結側に流動させろパ
ージ流体のプツシ。However, since the bushing is designed to ensure its valve stem protection function by bringing the end face of the bushing into contact with the valve body, it is necessary to push the purge fluid between the valve stem and bushing toward the valve body connection side.
ュ端部からの抜けが悪く、それによって、そのパージ流
体の流動量がかなりの少量に制約されるために、高温流
体により高温化した弁棒及びブツシュに対するパージ流
体の冷却効果を期待できなくなる問題があった。The problem is that the purge fluid does not easily come out from the end of the valve, and as a result, the flow rate of the purge fluid is restricted to a fairly small amount, making it impossible to expect the purge fluid to have a cooling effect on the valve stem and bushings that have become hot due to the high temperature fluid. was there.
本発明によるバタフライ弁の特徴構成は、弁体に端面を
接触させる状態で弁棒に相対回転自在に外嵌したブツシ
ュと前記弁棒との間にパージ流体を供給するようにした
構成に対して、前記ブツシュのうち全閉状態の前記弁体
よりも下流側で弁箱内流路に臨む部分に、その内周面と
にわたって貫通するパージ流体流出孔を形成したことに
あり、その作用・効果は次の通りである。A characteristic configuration of the butterfly valve according to the present invention is that the purge fluid is supplied between the bushing and the valve stem, which are fitted onto the valve stem so as to be relatively rotatable with their end surfaces in contact with the valve body. , a purge fluid outflow hole is formed in a portion of the bush facing the flow path in the valve box downstream of the valve body in the fully closed state, and extends through the inner circumferential surface of the bush, and its functions and effects is as follows.
つまり、弁体とブツシュの端面とが接触していても、弁
箱の筒状軸受部側からの供給で弁棒とブツシュとの間を
弁体連結側に流動するパージ流体はブツシュに形成した
パージ流体流出孔から円滑に排出されるから、従前の如
くパージ流体の流動量がブツシュ端部からのパージ流体
の抜けの悪さによってかなりの少量に制約されてしまう
といったことを回避でき、壱の結果、高温流体により高
温化した弁棒及びブツシュをパージ流体をもって適度に
冷却することが可能となる。In other words, even if the valve body and the end face of the bushing are in contact, the purge fluid that flows between the valve stem and the bushing toward the valve body connection side by being supplied from the cylindrical bearing side of the valve body is formed in the bushing. Since the purge fluid is smoothly discharged from the outflow hole, it is possible to avoid the conventional situation in which the flow rate of the purge fluid is limited to a fairly small amount due to poor drainage of the purge fluid from the bush end. The valve stem and bushing, which have become hot due to the high-temperature fluid, can be appropriately cooled using the purge fluid.
尚、パージ流体流出孔を全閉状態の弁体よりも下流側で
ブツシュに形成したことにより、パージ流体流出用孔を
介しての逆流による取扱流体のリークは防止される。By forming the purge fluid outflow hole in the bush on the downstream side of the fully closed valve body, leakage of the handled fluid due to backflow through the purge fluid outflow hole is prevented.
上述の結果、弁体とブツシュ端面との接触による確実な
弁棒保護を維持しながら、パージ流体による弁棒及びブ
ツシュの適度な冷却により、高温化に起因した弁棒とブ
ツシュとの摩擦係数の増大を抑制できる。As a result of the above, while maintaining reliable valve stem protection through contact between the valve body and the end face of the bushing, the coefficient of friction between the valve stem and bushing caused by high temperatures can be reduced by moderately cooling the valve stem and bushing with the purge fluid. Increase can be suppressed.
又、高温化に起因した弁棒強度の低下をも抑制できて弁
棒の小径化が可能となり、更には、弁棒の小径化により
、弁棒回転操作トルクを低減できると共に、流路断面に
おける弁棒占有面積を小さくできて弁の流量特性を向上
でき、全体として、高温流体に対し耐久性並びに操作性
が高く、しかも、流量特性面でも優れたバタフライ弁に
できた。In addition, it is possible to suppress the decrease in the strength of the valve stem due to high temperatures, making it possible to reduce the diameter of the valve stem.Furthermore, by reducing the diameter of the valve stem, the rotational operating torque of the valve stem can be reduced, and the The area occupied by the valve stem can be reduced, the flow characteristics of the valve can be improved, and the butterfly valve as a whole has high durability and operability for high-temperature fluids, and is also excellent in terms of flow characteristics.
次に本発明の実施例を図面に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.
第３図及び第４図に示すように、弁箱（１）に形成した
一対の筒状軸受部（１Ａ） 、 （１Ｂ）夫々にプラケ
ット（２Ａ） 、 （２Ｂ）を取付け、弁体（３）に対
して貫通状に嵌合連結した回転弁棒（４）を、筒状軸受
部（１Ａ） 、 （１Ｂ）の夫々に対して貫通させると
共に、一方のブラケット（２Ａ）に取付けた弁開閉操作
用の駆動装置（５）に連動連結し、もって、高温流体輸
送系に好適で大口径のバタフライ弁を構成しである。As shown in FIGS. 3 and 4, plackets (2A) and (2B) are attached to a pair of cylindrical bearings (1A) and (1B) formed on the valve body (1), respectively, and the valve body (3 ) is inserted through the cylindrical bearings (1A) and (1B), and a valve opening/closing valve attached to one bracket (2A) is inserted through each of the cylindrical bearings (1A) and (1B). It is operatively connected to a driving device (5) for operation, thereby forming a large-diameter butterfly valve suitable for high-temperature fluid transport systems.
第１図ないし第４図に示すように、筒状軸受部（１Ａ）
、 （１Ｂ）の夫々に弁棒（４）との間には、夫々弁
棒（４）に対して相対回転自在に外嵌させた軸受ブツシ
ュ（６）と弁棒保護用ブツシュ（７）とを弁棒軸芯（Ｐ
）方向に並べて介装してあり、それら軸受ブツシュ（６
）及び弁棒保護用ブツシュ（７）を圧縮コイルスプリン
グ（８）で弁体側に常時付勢して、弁体側に位置する弁
棒保護用ブツシュ（７）の端面を弁体（３）（詳しくは
弁棒嵌合連結用ボス（３Ａ）の端面）に押圧接触させる
ことにより、弁棒軸芯（Ｐ）方向における弁体（３）の
位置決めを図ると共に、弁棒（４）の弁体連結部近くが
流体中に晒されることを阻止する弁棒保護用ブツシュ（
７）の保３！機能を確実にするようにしである。As shown in Figures 1 to 4, the cylindrical bearing part (1A)
, (1B) and the valve stem (4), there are a bearing bush (6) and a valve stem protection bush (7) fitted externally so as to be rotatable relative to the valve stem (4), respectively. the valve stem axis (P
), and these bearing bushes (6
) and the valve stem protection bush (7) are constantly urged toward the valve body side by the compression coil spring (8), and the end face of the valve stem protection bush (7) located on the valve body side is pressed against the valve body (3) (details). By making pressure contact with the end surface of the valve stem fitting connection boss (3A), the valve body (3) is positioned in the direction of the valve stem axis (P), and the valve body connection of the valve stem (4) is achieved. Valve stem protection bushing (
7) No.3! This is to ensure functionality.
筒状軸受部（１４） 、 （１Ｂ）の夫々には、軸受ブ
ツシュ（６）の介装部に対して空気や窒素ガス、あるい
は、１気等のパージ流体を供給する管（９）を接続して
あり、その管（９）からのパージ流体は軸受ブツシュ（
６）の内外周画人々に形成した周溝（ａ） 、 （ｂ）
及びそれら周溝（ａ） 、 （ｂ）どうしを連通ずる複
数の小孔（ｃ）を介して軸受ブツシュ（６）の内周側に
供給される。A pipe (9) is connected to each of the cylindrical bearing parts (14) and (1B) to supply a purge fluid such as air, nitrogen gas, or 1 air to the intervening part of the bearing bush (6). The purge fluid from the pipe (9) is supplied to the bearing bush (
6) Circumferential grooves formed on the inner and outer circumference of people (a), (b)
And it is supplied to the inner circumferential side of the bearing bushing (6) through a plurality of small holes (c) that communicate the circumferential grooves (a) and (b) with each other.
又、そのパージ流体供給構成に対し、弁棒保５用ブツシ
ュ（７）の夫々において全閉状態の弁体（３）よりも下
流側で弁箱内流路（Ｌ）にｐｔむ部分には、その内周面
と外周面とにわたって貫通するパージ流体流出孔（ｄ）
の複数を分散配置して形成しである。In addition, with respect to the purge fluid supply configuration, in each of the bushes (7) for the valve stem retainer 5, there is a part that connects to the flow path (L) in the valve box on the downstream side of the valve body (3) in the fully closed state. , a purge fluid outflow hole (d) penetrating through its inner and outer circumferential surfaces.
It is formed by dispersing and arranging a plurality of.
つまり、それらパージ流体流出孔（ｄ）を形成すること
により、軸受ブツシュ（６）の内周側に供給されたパー
ジ流体を弁棒保護用ブ・ノシュ（７）の内周面と弁棒（
４）の外周面との間を介して弁体側へも円滑に流動させ
るようにし、もって、高温流体により高温化した弁棒（
４）及び弁棒保護用ブツシュ（７）を弁体側への流動パ
ージ流体により適度に冷却して高温化に起因した弁棒（
４）とブツシュ（７）との摩擦抵抗の増大、並びに、弁
棒強度の低下を効果的に抑制するようにしである。In other words, by forming these purge fluid outflow holes (d), the purge fluid supplied to the inner circumferential side of the bearing bush (6) is transferred to the inner circumferential surface of the valve stem protection bush (7) and the valve stem (
4) and the outer circumferential surface of the valve body to smoothly flow the valve body (
4) and the valve stem protection bushing (7) are appropriately cooled by flowing purge fluid toward the valve body side to remove the valve stem (7) caused by high temperature.
4) and the bush (7), as well as a decrease in the strength of the valve stem.
尚、パージ流体流出孔（ｄ）を全閉状態の弁体（３）よ
りも下流側で弁棒保護用ブツシュ（７）に形成したこと
により、そのパージ流体流出孔（ｄ）を介しての逆流に
よる取扱流体のリークは防止される。In addition, by forming the purge fluid outflow hole (d) in the valve stem protection bushing (7) on the downstream side of the fully closed valve body (3), the purge fluid outflow hole (d) is Leakage of the handling fluid due to backflow is prevented.
図中（１０）は筒状軸受部（１Ａ） 、 （１Ｂ）の夫
々に連結したグランドケース、（１１）はスプリング受
座、（１２）はグランドパツキン、（１３）はパツキン
押え、又、（１４）はグランドパツキン（１２）の介装
箇所にグリスを供給する管である。In the figure, (10) is the gland case connected to each of the cylindrical bearing parts (1A) and (1B), (11) is the spring seat, (12) is the gland packing, (13) is the packing holder, and ( 14) is a pipe for supplying grease to the interposed part of the gland packing (12).
筒状軸受部（１Ａ） 、 （１Ｂ）の夫々から突出した
弁棒（４）の両端部分は、ブラケット（２Ａ） 、 （
２Ｂ）の夫々に取付けた軸受ベアリング（１５）により
軸受支承してあり、軸芯方向中央部に弁体（３）を連結
した弁＃ （４）を、その両端部の夫々において前述の
軸受ブツシュ（６）と軸受ベアリング（１５）との弁棒
軸芯方向の２箇所で軸支支承することにより、曲げモー
メントに対する弁棒支持強度を高めて弁棒（４）の小径
化を可能にしである。Both end portions of the valve stem (4) protruding from the cylindrical bearing portions (1A) and (1B) are connected to the brackets (2A) and (1B), respectively.
Valve # (4) is supported by bearings (15) attached to each of #2B) and has a valve body (3) connected to its central portion in the axial direction. (6) and bearing (15) are supported at two locations in the axial direction of the valve stem, increasing the strength of supporting the valve stem against bending moments and making it possible to reduce the diameter of the valve stem (4). .
一方、弁棒（４）と弁体（３）との嵌合連結構造につい
ては、中空状に形成した弁体（３）の回転軸芯部に弁体
構成部材の一つとして弁棒嵌合連結用のボス（３Ａ）を
設け、そのボス（３Ａ）に対して弁棒（４）を貫通状荷
嵌合すると共に、キー構造（１６）により弁棒（４）と
ボス（３Ａ）とを相対回転不能に、かつ、ビン（１７）
により弁棒軸芯（Ｐ）方向への相対摺動不能に連結しで
ある。On the other hand, regarding the fitting connection structure between the valve stem (4) and the valve body (3), the valve stem is fitted into the rotation axis of the hollow valve body (3) as one of the valve body constituent members. A connecting boss (3A) is provided, and the valve stem (4) is fitted through the boss (3A), and the key structure (16) is used to connect the valve stem (4) and the boss (3A). Relatively unrotatable and bottle (17)
The valve stem is connected so as to be immovable relative to the valve stem axis (P).
又、弁棒（４）とボス（３Ａ）との嵌合部のうち、ボス
（３Ａ）の両端部側（すなわち、弁体（３）の両端部側
）夫々においては弁棒（４）とボス（３Ａ）とを密嵌さ
せ、かつ、ボス（３Ａ）の中央部（すなわち、弁体（３
）の中央部）において弁棒（４）とボス（３Ａ）との間
に巾広の周溝から成る隙間（Ｓ）を形成するようにボス
（３Ａ）の内周面を加工しである。Furthermore, in the fitting portion between the valve stem (4) and the boss (3A), the valve stem (4) and The central part of the boss (3A) (i.e., the valve body (3A)
) The inner circumferential surface of the boss (3A) is machined to form a gap (S) consisting of a wide circumferential groove between the valve stem (4) and the boss (3A).
つまり、上述の如き隙間（Ｓ）の形成により、弁体（３
）に作用する流体圧荷重の弁棒（４）に対する作用点を
弁体（３）の両端部側に寄せて弁棒（４）にかかる曲げ
モーメントそのものを軽減し、もって、前述のパージ流
体流出孔（ｄ）の形成による弁棒強度の低下抑制、並び
に、２点軸受支承による弁棒支持強度の向上と相俟って
、弁棒（４）の一層の小径化を可能にしである。In other words, by forming the gap (S) as described above, the valve body (3
), the point of action of the fluid pressure load acting on the valve stem (4) is shifted to both ends of the valve body (3), thereby reducing the bending moment applied to the valve stem (4), thereby reducing the aforementioned purge fluid outflow. In combination with suppressing a decrease in the strength of the valve stem by forming the hole (d) and improving the support strength of the valve stem by the two-point bearing support, it is possible to further reduce the diameter of the valve stem (4).
次に本発明の別実施例を説明する。 Next, another embodiment of the present invention will be described.
ブツシュ（７）に形成するパージ流体流出孔（ｄ）は１
個又は複数個のいずれであっても良い。The purge fluid outflow hole (d) formed in the bush (7) is 1
It may be one or more.
パージ流体としては、蒸気や窒素ガス、あるいは、空気
等、種々の流体を適用できる。As the purge fluid, various fluids such as steam, nitrogen gas, or air can be used.
本発明は高温流体を取扱うバタフライ弁に好適であるが
、具体的取扱流体は不問である。Although the present invention is suitable for butterfly valves that handle high-temperature fluids, the specific fluids that can be handled are not critical.
第１図ないし第４図は本発明の実施例を示し、第１図は
要部の拡大断面図、第２図は第１図におけるｎ−ｎ線断
面図、第３図は全体断面図、第４図は弁体部分の断面図
である。
（１）・・・・・・弁箱、（１Ａ） 、 （１Ｂ）・・
・・・・筒状軸受部、（３）・・・・・・弁体、（４）
・・・・・・弁棒、（７）・・・・・・ブツシュ、（９
）・・・・・・パージ流体供給路、（Ｌ）・・・・・・
弁箱内流路、（ｄ）・・・・・・パージ流体流出孔。1 to 4 show embodiments of the present invention, FIG. 1 is an enlarged sectional view of the main part, FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. 3 is an overall sectional view. FIG. 4 is a sectional view of the valve body portion. (1)...Valve box, (1A), (1B)...
...Tubular bearing part, (3) ... Valve body, (4)
... Valve stem, (7) ... Bushu, (9
)...Purge fluid supply path, (L)...
Flow path in the valve box, (d)... Purge fluid outflow hole.
Claims (1)
弁箱（１）の筒状軸受部（１Ａ）、（１Ｂ）との間にお
いて、前記弁棒（４）に対して相対回転自在に外嵌した
ブッシュ（７）を、その端面を前記弁体（３）に接触さ
せる状態で設け、前記弁棒（４）とブッシュ（７）との
間に対してパージ流体を供給するパージ流体供給路（９
）を前記筒状軸受部（１Ａ）、（１Ｂ）に接続したバタ
フライ弁であって、前記ブッシュ（７）のうち全閉状態
の前記弁体（３）よりも下流側で弁箱内流路（Ｌ）に臨
む部分に、その内周面と外周面とにわたって貫通するパ
ージ流体流出孔（ｄ）を形成したバタフライ弁。Between the rotary valve stem (4) to which the valve body (3) is connected and the cylindrical bearings (1A) and (1B) of the valve body (1) that support it, with respect to the valve stem (4). A bush (7) fitted externally so as to be relatively rotatable is provided with its end surface in contact with the valve body (3), and purge fluid is supplied between the valve stem (4) and the bush (7). Purge fluid supply path (9
) are connected to the cylindrical bearings (1A) and (1B), the butterfly valve having a flow path in the valve box on the downstream side of the valve body (3) in the fully closed state of the bush (7). A butterfly valve in which a purge fluid outflow hole (d) is formed in a portion facing (L) that extends through the inner and outer peripheral surfaces of the butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21365586A JPS6367469A (en) | 1986-09-10 | 1986-09-10 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21365586A JPS6367469A (en) | 1986-09-10 | 1986-09-10 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6367469A true JPS6367469A (en) | 1988-03-26 |
| JPH033097B2 JPH033097B2 (en) | 1991-01-17 |
Family
ID=16642759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21365586A Granted JPS6367469A (en) | 1986-09-10 | 1986-09-10 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6367469A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220821A (en) * | 1989-02-22 | 1990-09-04 | Toppan Printing Co Ltd | Multi-layered molded product |
| JPH0363114A (en) * | 1989-08-02 | 1991-03-19 | Toyo Seikan Kaisha Ltd | Package of multi-wall plastic container |
| JP2011514485A (en) * | 2008-01-22 | 2011-05-06 | フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー | Device for energizing valve closing member |
-
1986
- 1986-09-10 JP JP21365586A patent/JPS6367469A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220821A (en) * | 1989-02-22 | 1990-09-04 | Toppan Printing Co Ltd | Multi-layered molded product |
| JPH0363114A (en) * | 1989-08-02 | 1991-03-19 | Toyo Seikan Kaisha Ltd | Package of multi-wall plastic container |
| JP2011514485A (en) * | 2008-01-22 | 2011-05-06 | フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー | Device for energizing valve closing member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033097B2 (en) | 1991-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |