JP2652473B2 - Cage valve - Google Patents
Cage valveInfo
- Publication number
- JP2652473B2 JP2652473B2 JP7678391A JP7678391A JP2652473B2 JP 2652473 B2 JP2652473 B2 JP 2652473B2 JP 7678391 A JP7678391 A JP 7678391A JP 7678391 A JP7678391 A JP 7678391A JP 2652473 B2 JP2652473 B2 JP 2652473B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- cage
- coil spring
- valve plug
- 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
- Sliding Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は管路における各種流体の
流れを閉止したり制御するための調節弁の一機種である
ケ―ジ弁に関し、特に弁漏れの少ないケ―ジ弁に関す
る。ケ―ジ弁は流体の流れを制御して流量や圧力や温度
等を調節すると共に、閉止時には流体の流れを閉止する
ためのものであり、蒸気、水、エア―等各種流体に対し
て用いられている。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage valve which is one type of a control valve for closing and controlling the flow of various fluids in a pipeline, and more particularly to a cage valve having a small valve leakage. The cage valve controls the flow of the fluid to adjust the flow rate, pressure, temperature, etc., and closes the flow of the fluid when closed. It is used for various fluids such as steam, water, air, etc. Have been.
【０００２】[0002]
【従来の技術】従来のケ―ジ弁としては例えば特公平２
−１８４７０号公報に示されたものがある。これは、弁
室内に円筒状の周壁からなるケ―ジを配置し、周壁に流
体を通過するための窓と複数の弁座を設け、ケ―ジ内に
弁プラグを配置し、この弁プラグに上記弁座に対応した
着座部を設けると共に、弁プラグの上下を連通する貫通
孔を設けたもので、弁プラグを上下に摺動して流体通過
窓の開口面積を変化させ流れを制御するものである。上
下の操作方向に作用する圧力差は、弁プラグの貫通孔に
より弁プラグの上下にほぼ均等に作用することとなり相
殺されて弁プラグにはほとんど作用しなくなり、小さな
操作力でもって弁を開閉制御することができ、閉止時に
は弁プラグを弁座に対して密接することにより、流体の
弁漏れを防止するものである。2. Description of the Related Art As a conventional cage valve, for example, Japanese Patent Publication No.
There is one disclosed in Japanese Patent Publication No. 18470. This is achieved by disposing a cage having a cylindrical peripheral wall in a valve chamber, providing a window and a plurality of valve seats on the peripheral wall for passing a fluid, disposing a valve plug in the cage, and disposing the valve plug. The seat portion corresponding to the above-mentioned valve seat is provided, and a through hole communicating the upper and lower sides of the valve plug is provided, and the valve plug is slid up and down to change the opening area of the fluid passage window to control the flow. Things. The pressure difference acting in the up and down operation direction acts almost equally on the top and bottom of the valve plug by the through hole of the valve plug and is canceled out, and hardly acts on the valve plug. When the valve is closed, the valve plug is brought into close contact with the valve seat to prevent fluid leakage.
【０００３】[0003]
【発明が解決しようとする課題】上記従来のものでは、
弁閉止時において弁漏れを完全に無くすことができない
問題があった。これは、円筒状の周壁の上部と下部にそ
れぞれ弁座を形成し、一体の弁プラグに設けた複数の着
座部で上下２つの弁座を同時にシ―ルしなければなら
ず、確実にシ―ルするためにはこれら弁座・着座部が極
めて高度な加工精度で仕上げられていることを必要とし
事実上困難なものであるためである。SUMMARY OF THE INVENTION In the above prior art,
There has been a problem that valve leakage cannot be completely eliminated when the valve is closed. This is because valve seats are formed on the upper and lower portions of the cylindrical peripheral wall, respectively, and the upper and lower two valve seats must be simultaneously sealed by a plurality of seating portions provided on an integral valve plug. This is because these valve seats and seating parts need to be finished with extremely high processing accuracy, which is practically difficult.
【０００４】また上記従来のものでは、所望の流量特性
を得るためにはケ―ジに設けた窓の形状を特殊なものと
しなければならず、ケ―ジ自身が高価なものとなってし
まう問題があった。例えば、弁プラグの開弁に応じて徐
々に流量が増えるような流量特性を得ようとすると、窓
の形状を略逆三角形のような形状にしなければならず、
機械加工を行うにしても鋳造を行うにしても複雑な工程
を必要とし、高価なものとなってしまうのである。Further, in the above-described conventional apparatus, the shape of the window provided in the cage must be made special in order to obtain a desired flow characteristic, and the cage itself becomes expensive. There was a problem. For example, in order to obtain a flow rate characteristic in which the flow rate gradually increases in accordance with the opening of the valve plug, the shape of the window must be substantially inverted triangular.
Both mechanical processing and casting require complicated processes and are expensive.
【０００５】従って本発明の技術的課題は、ケ―ジ自身
を安価に製作できると共に、弁漏れの生じないケ―ジ弁
を得ることである。Accordingly, it is an object of the present invention to provide a cage valve which can be manufactured at a low cost and which does not cause valve leakage.
【０００６】[0006]
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、弁ケ―シング
で入口と弁室と出口を形成し、弁室に複数の弁座を設け
た円筒状のケ―ジを配置し、該ケ―ジ内に摺動自在に及
び上記弁座と対向して着座部を設けた弁プラグを配置し
たものにおいて、ケ―ジを複数に分割し、該分割したケ
―ジ間にコイルバネを取り付け、ケ―ジの一端を弁ケ―
シングに対して摺動自在に配置したものである。Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is that an inlet, a valve chamber and an outlet are formed by valve casing, and a plurality of valves are provided in the valve chamber. A cylindrical cage provided with a seat is disposed, and a valve plug provided with a seat portion slidably in the cage and opposed to the valve seat is disposed. And a coil spring is attached between the divided cages, and one end of the cage is connected to a valve cage.
It is slidably arranged with respect to the thing.
【０００７】[0007]
【作用】上記の技術的手段の作用は下記の通りである。
ケ―ジを複数に分割し、その間にコイルバネを取り付け
たことにより、複数の着座部で同時にシ―ルする必要が
なく、高度な加工精度を必要としない。例えば、ケ―ジ
の複数の弁座のうち、弁ケ―シングに対して摺動自在に
配置した側の弁座に対してまず弁プラグの着座部が着座
し、さらに弁プラグが変位することによりコイルバネを
変位せしめて他方の弁座に着座することにより、複数の
着座部において加工上の誤差があったとしてもコイルバ
ネで吸収することができ、確実にシ―ルして弁漏れを防
止することができる。The operation of the above technical means is as follows.
Since the cage is divided into a plurality of parts and a coil spring is mounted therebetween, there is no need to simultaneously seal a plurality of seats, and a high processing accuracy is not required. For example, among a plurality of valve seats of a cage, a seat portion of a valve plug is first seated on a valve seat slidably disposed with respect to a valve casing, and the valve plug is further displaced. By displacing the coil spring and seating on the other valve seat, even if there is a processing error in a plurality of seating portions, the error can be absorbed by the coil spring, and sealing can be reliably performed to prevent valve leakage. be able to.
【０００８】また複数のケ―ジ間にコイルバネを取り付
け、ケ―ジの他端側を摺動自在に配置したことにより、
弁プラグの変位に応じてコイルバネのピッチが変化して
開度が変わることによって所望の流量特性を得ることが
でき、ケ―ジに特殊な形状の窓を設ける必要がない。In addition, a coil spring is mounted between a plurality of cages, and the other end of the cage is slidably disposed.
A desired flow characteristic can be obtained by changing the pitch of the coil spring in accordance with the displacement of the valve plug and the degree of opening, and there is no need to provide a specially shaped window in the cage.
【０００９】[0009]
【実施例】上記の技術的手段の具体例を示す実施例を説
明する（図１参照）。本体１とボンネット１１を接続部
材１０を介してボルト３５で結合して弁ケ―シングを形
成する。本体１に入口２と弁室３と出口４を形成する。
弁室３内に円筒状のケ―ジ５ａ，５ｂをコイルバネ６を
介して取り付ける。コイルバネ６の両端は、ケ―ジ５
ａ，５ｂに溶接して固定する。下ケ―ジ５ｂには弁プラ
グ９の下端が接する弁座７を形成し、上ケ―ジ５ａには
弁プラグ９の上段部９ａが接する弁座８を形成する。上
下のケ―ジ５ａ，５ｂにはパッキング３０，３１を取り
付けると共に、上ケ―ジ５ａの上部には、本体１内を摺
動可能なように隙間３２を設ける。ケ―ジ５ａ，５ｂ及
びコイルバネ６内に逆コップ状の弁プラグ９を上下動可
能に配する。弁プラグ９には弁座７，８に対向して着座
部を設け、上部にはケ―ジ５ａ内を連通する貫通孔１２
を設ける。弁プラグ９の上部には、この弁プラグ９を外
部から操作するための操作棒２５を接続する。An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The main body 1 and the bonnet 11 are connected by bolts 35 via the connecting members 10 to form a valve casing. An inlet 2, a valve chamber 3 and an outlet 4 are formed in the main body 1.
Cylindrical cages 5 a and 5 b are mounted in the valve chamber 3 via a coil spring 6. Both ends of the coil spring 6 are cage 5
a, 5b and fixed by welding. The lower cage 5b has a valve seat 7 with which the lower end of the valve plug 9 contacts, and the upper cage 5a has a valve seat 8 with which the upper step 9a of the valve plug 9 contacts. Packings 30, 31 are attached to the upper and lower cages 5a, 5b, and a gap 32 is provided above the upper cage 5a so as to be slidable in the main body 1. An inverted cup-shaped valve plug 9 is arranged in the cages 5a and 5b and the coil spring 6 so as to be vertically movable. A seat portion is provided in the valve plug 9 so as to face the valve seats 7 and 8, and a through hole 12 communicating with the inside of the cage 5a is provided in an upper portion.
Is provided. An operating rod 25 for operating the valve plug 9 from outside is connected to the upper part of the valve plug 9.
【００１０】弁プラグ９が閉弁時にはコイルバネ６はほ
ぼ全圧縮状態にある（図１に示す状態）。この場合、ケ
―ジ５ａ，５ｂの弁座７，８の位置が弁プラグ９の位置
とずれていてもコイルバネ６が吸収することにより、上
下の弁座７，８部は一体の弁プラグ９でもって確実にシ
―ルされ弁漏れを生じることはない。When the valve plug 9 is closed, the coil spring 6 is almost fully compressed (the state shown in FIG. 1). In this case, even if the positions of the valve seats 7 and 8 of the cages 5a and 5b are shifted from the position of the valve plug 9, the coil spring 6 absorbs the upper and lower valve seats 7 and 8. This ensures that the seal is sealed and does not cause valve leakage.
【００１１】弁プラグ９を操作棒２５により少量上方へ
移動して開弁した場合、コイルバネ６の弾性力により、
上ケ―ジ５ａは少量上昇するが弁プラグ９の上段部９ａ
と弁座８との間は密着したままであり、弁プラグ９の下
端と弁座７の間は少量開弁すると共に、コイルバネ６の
バネ間ピッチすなわち隙間が発生する。従って、入口２
からの流体は、弁プラグ９の下端と弁座７の間及びコイ
ルバネ６の隙間を通って出口４へ流下する。弁プラグ９
を開弁するに連れてコイルバネ６の隙間は徐々に大きく
なり出口４へ流下する流量も徐々に多くなる。さらに弁
プラグ９を開弁すると、上ケ―ジ５ａは接続部材１０に
当接してそれ以上上昇できなくなり、コイルバネ６の隙
間は一定になるが、弁プラグ９の下端と弁座７との間は
さらに拡がり多量の流体を流下せしめる。When the valve plug 9 is moved upward by a small amount by the operating rod 25 and opened, the elastic force of the coil spring 6 causes the valve plug 9 to open.
The upper cage 5a rises a little but the upper step 9a of the valve plug 9
And the valve seat 8 are kept in close contact with each other, a small amount of valve is opened between the lower end of the valve plug 9 and the valve seat 7, and a pitch between the springs of the coil spring 6, that is, a gap is generated. Therefore, entrance 2
Flows down to the outlet 4 through the gap between the lower end of the valve plug 9 and the valve seat 7 and through the gap of the coil spring 6. Valve plug 9
As the valve is opened, the gap between the coil springs 6 gradually increases, and the flow rate flowing down to the outlet 4 also gradually increases. When the valve plug 9 is further opened, the upper cage 5a comes into contact with the connecting member 10 and cannot be raised any further, and the gap between the coil springs 6 becomes constant. Spreads further and allows a large amount of fluid to flow down.
【００１２】弁プラグ９が下方へ移動して閉弁する場合
は、まず弁プラグ９の上段部９ａが弁座８に当接して上
ケ―ジ５ａが徐々に下方に変位しながらコイルバネ６の
隙間も小さくなる。さらに弁プラグ９が閉弁すると、弁
座７に対して弁プラグ９の下端が当接して流体の流下を
なくすと共に、上側の弁座８部にもコイルバネ６の弾性
力が作用して流体の流下を防止する。When the valve plug 9 moves downward to close the valve, first, the upper step 9a of the valve plug 9 comes into contact with the valve seat 8 and the upper cage 5a is gradually displaced downward while the coil spring 6 is closed. The gap becomes smaller. When the valve plug 9 is further closed, the lower end of the valve plug 9 abuts against the valve seat 7 to prevent the fluid from flowing down, and the elastic force of the coil spring 6 also acts on the upper valve seat 8 to prevent the fluid from flowing. Prevents runoff.
【００１３】本実施例においては、ケ―ジを上下２つに
分割した例を示したが、その他２つ以上等に分割するこ
ともできるし、分割した間すべてにコイルバネを取り付
けたり、あるいは一部にコイルバネを取り付けたりする
ことにより、流量特性を変えることができる。In this embodiment, an example in which the cage is divided into two upper and lower parts is shown. However, the cage can be divided into two or more parts, and a coil spring can be attached to all parts during the division, or The flow characteristics can be changed by attaching a coil spring to the portion.
【００１４】[0014]
【発明の効果】本発明は下記の特有の効果を生じる。上
記のように本発明によれば、ケ―ジを複数に分割してそ
の間にコイルバネを取り付けたことにより、複数の弁座
の加工精度が高いものでなくて済み、且つ弁座間の誤差
はコイルバネが吸収することによって、複数の弁座と着
座部との間のシ―ル性が確実なものとなり、弁漏れのな
いケ―ジ弁を得ることができる。The present invention has the following specific effects. As described above, according to the present invention, since the cage is divided into a plurality of parts and the coil spring is attached therebetween, the machining accuracy of the plurality of valve seats does not need to be high, and the error between the valve seats is reduced by the coil spring. , The sealability between the plurality of valve seats and the seating portion is ensured, and a cage valve without valve leakage can be obtained.
【００１５】また、コイルバネの隙間が窓の作用を果す
ことにより、ケ―ジに特殊な形状の窓を設ける必要がな
く、ケ―ジ自身を安価に製作することができる。Since the gap between the coil springs serves as a window, there is no need to provide a specially shaped window in the cage, and the cage itself can be manufactured at low cost.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明のケ―ジ弁の実施例の要部断面図であ
る。FIG. 1 is a sectional view of a main part of an embodiment of a cage valve of the present invention.
１ 本体 ２ 入口 ４ 出口 ５ａ，５ｂ ケ―ジ ６ コイルバネ ７，８ 弁座 ９ 弁プラグ DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 4 Outlet 5a, 5b Cage 6 Coil spring 7,8 Valve seat 9 Valve plug
Claims (1)
し、弁室に複数の弁座を設けた円筒状のケ―ジを配置
し、該ケ―ジ内に摺動自在に及び上記弁座と対向して着
座部を設けた弁プラグを配置したものにおいて、ケ―ジ
を複数に分割し、該分割したケ―ジ間にコイルバネを取
り付け、ケ―ジの一端を弁ケ―シングに対して摺動自在
に配置したケ―ジ弁。An inlet, a valve chamber, and an outlet are formed by valve casing, and a cylindrical cage having a plurality of valve seats disposed in the valve chamber is slidably disposed in the casing. And a valve plug provided with a seat portion facing the valve seat, wherein the cage is divided into a plurality of parts, a coil spring is attached between the divided cages, and one end of the cage is connected to the valve case. -A cage valve slidably arranged with respect to the thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7678391A JP2652473B2 (en) | 1991-03-15 | 1991-03-15 | Cage valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7678391A JP2652473B2 (en) | 1991-03-15 | 1991-03-15 | Cage valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04285370A JPH04285370A (en) | 1992-10-09 |
| JP2652473B2 true JP2652473B2 (en) | 1997-09-10 |
Family
ID=13615202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7678391A Expired - Fee Related JP2652473B2 (en) | 1991-03-15 | 1991-03-15 | Cage valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652473B2 (en) |
-
1991
- 1991-03-15 JP JP7678391A patent/JP2652473B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04285370A (en) | 1992-10-09 |
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