JPH04262409A - Control valve - Google Patents
Control valveInfo
- Publication number
- JPH04262409A JPH04262409A JP4418291A JP4418291A JPH04262409A JP H04262409 A JPH04262409 A JP H04262409A JP 4418291 A JP4418291 A JP 4418291A JP 4418291 A JP4418291 A JP 4418291A JP H04262409 A JPH04262409 A JP H04262409A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve member
- pressure
- reaches
- inlet
- 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
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract 3
- 239000012530 fluid Substances 0.000 description 16
- 238000007789 sealing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
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に関し、特に調
節弁を操作するための操作力が小さくて済み且つ弁漏れ
の少ない調節弁に関する。調節弁は各種流体の流れを制
御するためのものであるが、特に流体圧力が高圧の場合
、弁部材の一次側と二次側に作用する圧力差が大きくな
り、その圧力差に抗して弁部材を操作するには非常に大
きな操作力を必要とする。[Field of Industrial Application] The present invention relates to a control valve for closing or controlling the flow of various fluids in a pipeline, and in particular to a control valve that requires only a small amount of operating force to operate the control valve and has less valve leakage. Regarding. Regulating valves are used to control the flow of various fluids, but when the fluid pressure is particularly high, the pressure difference acting on the primary and secondary sides of the valve member becomes large, and the valve is forced to resist the pressure difference. A very large operating force is required to operate the valve member.
【０００２】0002
【従来の技術】従来は例えば特公平２−１８４７０号公
報に示されている様な所謂ケ―ジ弁が用いられていた。
これは、弁室内に円筒状の周壁と弁プラグからなるケ―
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、弁プラグに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、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るものである。2. Description of the Related Art Conventionally, a so-called cage valve as shown in Japanese Patent Publication No. 2-18470 has been used. This is a case consisting of a cylindrical peripheral wall and a valve plug inside the valve chamber.
The valve plug is provided with a window for passage of fluid and multiple valve seats on the peripheral wall, a seating portion corresponding to the valve seat on the valve plug, and a through hole that communicates between the top and bottom of the valve plug. The flow is controlled by sliding the valve plug up and down to change the opening area of the fluid passage window. The pressure difference that acts in the upper and lower operating directions is canceled out because it acts almost equally on the upper and lower sides of the valve plug due to the through hole of the valve plug, and it hardly acts on the valve plug, making it possible to open and close the valve with a small operating force. It is something that can be done.
【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―ルするためには極めて高度な加工精度を必
要とし事実上困難なものであるためである。[Problem to be solved by the invention] In the above conventional method,
There was a problem that valve leakage could not be completely eliminated when the valve was closed. This requires forming valve seats at the upper and lower parts of the cylindrical peripheral wall, and simultaneously sealing the upper and lower two valve seats with multiple seating parts provided on the integrated valve plug. This is because it requires an extremely high degree of processing precision and is virtually difficult to perform.
【０００４】また高圧の流体が通過し、特に弁開度が小
さい場合は、弁座と着座部が絞られて高速の流体が流下
することにより、エロ―ジョン損傷を生じ、短期間で両
者の気密性が低下して、さらに弁漏れを促進してしまう
問題もあった。Furthermore, when high-pressure fluid passes through, especially when the valve opening is small, the valve seat and seat are constricted and the high-speed fluid flows down, causing erosion damage and causing damage to both parts in a short period of time. There was also the problem that airtightness deteriorated, further promoting valve leakage.
【０００５】従って本発明の技術的課題は、高圧の流体
を制御する場合であっても、弁部を操作する操作力が小
さくて済み、且つ高度な加工精度を必要とせず長期に渡
って弁漏れの生じない調節弁を得ることである。Therefore, the technical problem of the present invention is that even when controlling high-pressure fluid, the operating force required to operate the valve part is small, and the valve can be maintained for a long period of time without requiring high processing precision. The object of the present invention is to obtain a control valve that does not cause 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、弁室に入口と出口を区画
する弁部材と弁座部材を対向して配置し、弁部材で弁座
部材の周囲に第一の圧力室を形成すると共に、弁部材の
一端と弁ケ―シングで上記第一の圧力室と対向する第二
の圧力室を形成して、弁部材の他端を弁部材を操作する
ための操作端としたものである。[Means for Solving the Problems] The technical means of the present invention taken to solve the above technical problems is to form an inlet, a valve chamber, and an outlet in a valve casing, and to form an inlet and an outlet in the valve chamber. A valve member and a valve seat member are arranged facing each other, and the valve member forms a first pressure chamber around the valve seat member, and one end of the valve member and the valve casing form the first pressure chamber. A second pressure chamber facing the chamber is formed, and the other end of the valve member is used as an operating end for operating the valve member.
【０００７】[0007]
【作用】上記の技術的手段の作用は下記の通りである。
互いに対向する第一と第二の圧力室を形成したことによ
り、弁部材に作用する一次側と二次側の圧力差は相殺さ
れ、操作端から小さな操作力でもって弁部材を操作する
ことができる。また弁座部材の周囲に、弁部材で形成し
た第一の圧力室により、弁部材が微少開弁した場合でも
、弁部材と弁座部材の間の微少な通路を流下する流体量
は少なく、従って高速で流下することがなく両者にエロ
―ジョン損傷を生ぜしめることも無い。[Operation] The operation of the above technical means is as follows. By forming the first and second pressure chambers facing each other, the pressure difference between the primary side and the secondary side acting on the valve member is canceled out, and the valve member can be operated with a small operating force from the operating end. can. In addition, even if the valve member slightly opens due to the first pressure chamber formed by the valve member around the valve seat member, the amount of fluid flowing down the small passage between the valve member and the valve seat member is small. Therefore, it will not flow down at high speed and will not cause erosion damage to either of them.
【０００８】[0008]
【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）。弁ケ―シング１で入口２と弁室３
と出口４を形成する。弁室３内で弁ケ―シング１に設け
た取り付けネジに弁座部材５をネジ結合する。弁座部材
５は、略円柱状で、中央部に弁部材６の着座する着座部
７を設け、着座部７の上方に弁部材６と協働して第一の
圧力室８を設ける。弁部材６は略円錐状で、円錐部分の
一部に着座部７と接合するシ―ル面９を設け、円錐部分
の上部にピストン部１０を形成する。ピストン部１０に
は第一の圧力室８内の圧力を適度に維持するためのラビ
リンス１１を設ける。弁部材６には操作用の操作棒１２
を取り付けると共に、円錐部分の下端を延長し、その先
端部に下部ピストン１３を取り付ける。下部ピストン１
３の外周には摺動パッキング１５を取り付ける。下部ピ
ストン１３の外径は弁部材６のシ―ル面９とほぼ同径に
形成する。下部ピストン１３の外周に、弁ケ―シング１
に取り付けたシリンダ１６を配置する。シリンダ１６内
の上部室１７は連通孔１８により出口４と連通し、下部
室１９は弁部材６を貫通する貫通孔２０により入口２と
連通する。下部ピストン１３とシリンダ１６と上部室１
７と下部室１９とで第二の圧力室２１を形成する。[Example] An example showing a specific example of the above technical means will be described (see FIG. 1). Inlet 2 and valve chamber 3 in valve casing 1
and exit 4 is formed. The valve seat member 5 is screwed to a mounting screw provided on the valve casing 1 within the valve chamber 3. The valve seat member 5 has a substantially cylindrical shape, has a seating portion 7 in the center on which the valve member 6 is seated, and provides a first pressure chamber 8 above the seating portion 7 in cooperation with the valve member 6 . The valve member 6 has a substantially conical shape, and a sealing surface 9 that joins the seating portion 7 is provided in a part of the conical portion, and a piston portion 10 is formed in the upper portion of the conical portion. The piston portion 10 is provided with a labyrinth 11 for maintaining the pressure within the first pressure chamber 8 at an appropriate level. The valve member 6 has an operating rod 12 for operation.
At the same time, the lower end of the conical portion is extended, and the lower piston 13 is attached to the tip thereof. Lower piston 1
A sliding packing 15 is attached to the outer periphery of 3. The outer diameter of the lower piston 13 is formed to be approximately the same diameter as the sealing surface 9 of the valve member 6. The valve casing 1 is placed around the outer periphery of the lower piston 13.
The cylinder 16 attached to the is placed. An upper chamber 17 within the cylinder 16 communicates with the outlet 4 through a communication hole 18, and a lower chamber 19 communicates with the inlet 2 through a through hole 20 passing through the valve member 6. Lower piston 13, cylinder 16 and upper chamber 1
7 and the lower chamber 19 form a second pressure chamber 21.
【０００９】弁部材６が閉弁時（図１に示す状態）、入
口２から流入してきた流体は一部がラビリンス１１を通
り第一の圧力室８に至ると共に一部が貫通孔２０を通り
下部ピストン１３の下部室１９に至る。従って、弁部材
６にかかる入口２側と出口４側の圧力差に基く閉弁方向
の荷重は、下部ピストン１３の上方向の荷重と相殺され
て小さいものとなる。When the valve member 6 is closed (the state shown in FIG. 1), part of the fluid flowing in from the inlet 2 passes through the labyrinth 11 and reaches the first pressure chamber 8, and part of it passes through the through hole 20. It reaches the lower chamber 19 of the lower piston 13. Therefore, the load applied to the valve member 6 in the valve closing direction based on the pressure difference between the inlet 2 side and the outlet 4 side is offset by the upward load of the lower piston 13 and becomes small.
【００１０】弁部材６を操作棒１２により少量開弁した
場合、ピストン部１０の下端はまだ弁座部材５の円柱状
部内にあり、第一の圧力室８に流入する流体量はラビリ
ンス１１を通過してくる量だけの少量であり、着座部７
とシ―ル面９の間を流下する流体の速度は遅いものとな
る。従って、着座部７とシ―ル面９がエロ―ジョン損傷
を受けることは無い。またこの少量開弁時においても、
ピストン部１０あるいは弁部材６にかかる閉弁方向荷重
は、下部ピストン１３の上方向の荷重と相殺され小さい
ものとなっている。When the valve member 6 is slightly opened by the operating rod 12, the lower end of the piston portion 10 is still within the cylindrical portion of the valve seat member 5, and the amount of fluid flowing into the first pressure chamber 8 is smaller than the labyrinth 11. It is a small amount that passes through the seating part 7.
The speed of the fluid flowing down between the seal surface 9 and the seal surface 9 is slow. Therefore, the seating portion 7 and the sealing surface 9 will not be damaged by erosion. Also, even when the valve is opened a little,
The load in the valve closing direction applied to the piston portion 10 or the valve member 6 is offset by the upward load of the lower piston 13 and becomes small.
【００１１】弁部材６をさらに上方へ操作すると、ピス
トン部１０は弁座部材５から完全に離れ、入口２の流体
が多量に流下するが、この場合弁部材６のシ―ル面９と
弁座部材５の着座部７との間の距離も大きく開弁してい
るために流路が絞られることはなく、高速流によるエロ
―ジョン損傷を生じることが無い。When the valve member 6 is operated further upward, the piston portion 10 is completely separated from the valve seat member 5, and a large amount of fluid at the inlet 2 flows down, but in this case, the sealing surface 9 of the valve member 6 and the valve Since the distance between the seat member 5 and the seating portion 7 is wide open, the flow path will not be constricted, and erosion damage due to high-speed flow will not occur.
【００１２】本実施例においては、弁部材６に対して入
口流が閉弁方向に作用する例を示したが、逆の場合でも
同様の作用効果を生じる。即ち、入口を図１における４
として出口を２とした場合、入口流は弁部材６に対して
開弁方向に作用するが、下部ピストン１３により下方向
の荷重が作用するために相殺されることとなる。この場
合、貫通孔２０の一端を出口２側と直接連通するのでは
なく、第一の圧力室８内と連通しても良い。この様に流
体圧力による荷重が弁部材６のどのような位置において
も相殺されることは、特に操作棒１２を電動のモ―タや
空気圧のアクチュエ―タ等で操作する場合に、弁開度に
かかわらず一定の操作力で操作することができることと
なり、モ―タやアクチュエ―タの小型化や操作制御の簡
略化あるいは弁そのものの長寿命化に効果がある。In this embodiment, an example was shown in which the inlet flow acts on the valve member 6 in the valve closing direction, but the same effect can be obtained even in the opposite case. That is, the entrance is 4 in Figure 1.
When the number of outlets is 2, the inlet flow acts on the valve member 6 in the valve opening direction, but this is offset by the downward load acting on the lower piston 13. In this case, one end of the through hole 20 may be communicated with the inside of the first pressure chamber 8 instead of directly communicating with the outlet 2 side. The fact that the load due to fluid pressure is canceled out at any position on the valve member 6 in this way is particularly important when operating the operating rod 12 with an electric motor or pneumatic actuator. This means that the valve can be operated with a constant operating force regardless of the operating force, which is effective in downsizing the motor and actuator, simplifying operation control, and extending the life of the valve itself.
【００１３】[0013]
【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、一次側と二次側の圧力差を
第一と第二の圧力室で相殺することにより、弁部材に高
差圧が作用することがなく、従って小さな操作力でもっ
て弁部材を操作することができる。[Effects of the Invention] The present invention produces the following unique effects. As described above, according to the present invention, by canceling out the pressure difference between the primary side and the secondary side in the first and second pressure chambers, a high differential pressure does not act on the valve member, and therefore, small operation is possible. The valve member can be operated by force.
【００１４】また、弁部材が微少開弁した場合、第一の
圧力室により流下する流体量は少なく、弁部材と弁座部
材の間を高速流体が流下することがなく、エロ―ジョン
損傷を生じることもない。従って、弁と弁座の間のシ―
ル性を初期の高い状態のまま長期に渡って維持すること
ができ、弁漏れを生じることがない。Furthermore, when the valve member slightly opens, the amount of fluid flowing down due to the first pressure chamber is small, and high-speed fluid does not flow down between the valve member and the valve seat member, preventing erosion damage. It never happens. Therefore, the seal between the valve and the valve seat
It is possible to maintain the initial high level of leakage over a long period of time, and valve leakage does not occur.
【図１】本発明の調節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 control valve of the present invention.
１ 弁ケ―シング ２ 入口 ４ 出口 ５ 弁座部材 ６ 弁部材 ７ 着座部 ８ 第一の圧力室 １０ ピストン部 １２ 操作棒 １３ 下部ピストン ２０ 貫通孔 ２１ 第二の圧力室 1 Valve casing 2 Entrance 4 Exit 5 Valve seat member 6 Valve member 7 Seating area 8 First pressure chamber 10 Piston part 12 Operation rod 13 Lower piston 20 Through hole 21 Second pressure chamber
Claims (1)
成し、弁室に入口と出口を区画する弁部材と弁座部材を
対向して配置し、弁部材で弁座部材の周囲に第一の圧力
室を形成すると共に、弁部材の一端と弁ケ―シングで上
記第一の圧力室と対向する第二の圧力室を形成して、弁
部材の他端を弁部材を操作するための操作端とした調節
弁。Claim 1: A valve casing forms an inlet, a valve chamber, and an outlet, a valve member and a valve seat member that define the inlet and outlet in the valve chamber are disposed facing each other, and the valve member surrounds the valve seat member. A first pressure chamber is formed at one end of the valve member, and a second pressure chamber facing the first pressure chamber is formed at one end of the valve member and the valve casing, and the other end of the valve member is used to operate the valve member. A control valve with an operating end for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4418291A JP2652470B2 (en) | 1991-02-15 | 1991-02-15 | Control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4418291A JP2652470B2 (en) | 1991-02-15 | 1991-02-15 | Control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04262409A true JPH04262409A (en) | 1992-09-17 |
| JP2652470B2 JP2652470B2 (en) | 1997-09-10 |
Family
ID=12684435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4418291A Expired - Fee Related JP2652470B2 (en) | 1991-02-15 | 1991-02-15 | Control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652470B2 (en) |
-
1991
- 1991-02-15 JP JP4418291A patent/JP2652470B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2652470B2 (en) | 1997-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2514607C (en) | Control valve | |
| US5351717A (en) | High differential pressure control valve | |
| US4187884A (en) | Four-way valve employing fluid spring | |
| US4083380A (en) | Fluid valve assembly | |
| US6386509B1 (en) | Back pressure control valve | |
| JPS62251586A (en) | Pilot operation control valve | |
| KR20020022014A (en) | Vacuum exhaust valve | |
| US6095193A (en) | Smooth vent valve | |
| US4795129A (en) | Normally closed fluid switching logic element | |
| EP0392995A3 (en) | Ultrahigh purity gas valve with encapsulated bellows | |
| US8505578B2 (en) | Actuator for controlling a fluid flow | |
| JPH04262409A (en) | Control valve | |
| JP2762920B2 (en) | Flow control valve | |
| JP2002071048A (en) | Automatic pressure regulating valve | |
| US7100629B2 (en) | Method for assembling balanced normally-open and normally-closed valves | |
| US6981515B2 (en) | Balanced valve body for use with normally-open and normally-closed modes of operation | |
| JP2699027B2 (en) | Cage valve | |
| JP3769096B2 (en) | Pressure control valve for switching valve | |
| JPH04262173A (en) | Control valve | |
| JP2652473B2 (en) | Cage valve | |
| KR0161059B1 (en) | Flow control valve | |
| JPH04285369A (en) | Regulating valve | |
| US7654503B2 (en) | Pilot valve | |
| JP2004028248A (en) | Pressure control device | |
| JP3653161B2 (en) | Pressure control valve for switching valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |