JP2665846B2 - Valve body guide structure of pressure reducing valve - Google Patents
Valve body guide structure of pressure reducing valveInfo
- Publication number
- JP2665846B2 JP2665846B2 JP30225391A JP30225391A JP2665846B2 JP 2665846 B2 JP2665846 B2 JP 2665846B2 JP 30225391 A JP30225391 A JP 30225391A JP 30225391 A JP30225391 A JP 30225391A JP 2665846 B2 JP2665846 B2 JP 2665846B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- valve body
- outlet side
- shaft
- 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
- Lift Valve (AREA)
- Control Of Fluid Pressure (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は流体系に用いる減圧弁に
関し、特に弁体が弁口部に着座する場合の弁体案内構造
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure reducing valve used in a fluid system, and more particularly to a valve guide structure in which a valve is seated at a valve opening.
【０００２】減圧弁は、ダイヤフラムやベロ―ズ等で形
成した圧力応動部材の一面側に出口側の圧力を負荷さ
せ、他面にコイルバネ等で形成した圧力設定手段の弾性
力を負荷させて、両負荷のバランスにより、圧力応動部
材を変位せしめて弁体を開閉し、入口側の高圧流体を供
給停止することにより、出口側を所定の減圧状態に維持
するものであり、各種液体や気体や蒸気等の流体系に数
多く用いられている。[0002] A pressure reducing valve applies a pressure on an outlet side to one surface side of a pressure responsive member formed of a diaphragm, a bellows or the like, and applies an elastic force of a pressure setting means formed of a coil spring or the like to another surface. By balancing the two loads, the pressure responsive member is displaced to open and close the valve body, and supply of high-pressure fluid on the inlet side is stopped, thereby maintaining the outlet side in a predetermined reduced pressure state. It is widely used in fluid systems such as steam.
【０００３】減圧弁は高圧の入口側流体を減圧して出口
側に供給するものであるが、閉弁時において弁体が確実
に弁口を閉止していない場合は、本来出口側に供給して
はならない高圧の入口側流体を漏してしまい、減圧弁の
出口側が入口側と同程度の高圧状態となってしまう所謂
締切昇圧を生じて、出口側に接続した各種装置を損傷し
てしまう等の不都合を生じる。The pressure reducing valve reduces the pressure of the high-pressure inlet fluid and supplies the fluid to the outlet. When the valve body does not close the valve port when the valve is closed, the fluid is originally supplied to the outlet. The high-pressure inlet side fluid that should not be leaked, and the outlet side of the pressure reducing valve becomes in the same high pressure state as the inlet side, so-called a cutoff pressure increase, and various devices connected to the outlet side are damaged. And the like.
【０００４】[0004]
【従来の技術】従来は例えば実開昭６１−１５５９１０
号に示されているような弁体案内構造が用いられてい
た。これは、弁体と、弁体を案内する案内棒をユニバ―
サル継手で連結して、案内棒が偏芯してもその影響を受
けることなく、弁体は確実に弁口面に着座することによ
り、弁漏れを防止するものである。2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open No. 61-155910.
A valve guide structure as shown in the above-mentioned publication was used. This is a universal arrangement of the valve body and the guide rod that guides the valve body.
Even if the guide rod is eccentric, it is not affected by the eccentricity of the guide rod, and the valve body is reliably seated on the valve port surface, thereby preventing valve leakage.
【０００５】[0005]
【本発明が解決しようとする課題】上記従来のもので
は、使用初期においては確実に漏れを防止することがで
きるが、使用期間を経るに連れて弁漏れを生じる問題が
あった。これは、弁体に偏摩耗を生じ、弁体のシ―ル面
が傷付いてしまうためである。すなわち上記従来のもの
では、ユニバ―サル継手を介して弁体と案内棒を連結し
ていることにより、弁体が開弁時、特に全開時に弁口を
流下する流体の影響により弁体が弁口面に対して非平行
な傾いた状態となり、続いて閉弁する場合に弁体が大き
く傾いたままで閉弁し弁体は弁口の一端を支点に他端が
衝撃的に弁口に着座するために偏摩耗を生じ傷付くので
ある。In the above-mentioned conventional apparatus, it is possible to surely prevent leakage at the beginning of use, but there is a problem that valve leakage occurs over a period of use. This is because uneven wear occurs in the valve body, and the sealing surface of the valve body is damaged. That is, in the above-described conventional apparatus, the valve element is connected to the guide rod through the universal joint, so that the valve element is affected by the fluid flowing down the valve port when the valve element is opened, particularly when the valve element is fully opened. The valve is tilted non-parallel to the mouth surface, and when the valve is subsequently closed, the valve is closed with the valve body largely tilted, and the valve body is seated at one end of the valve port as a fulcrum and the other end is impacted at the valve port. This causes uneven wear and damage.
【０００６】従って本発明の技術的課題は、案内棒が偏
芯しても確実に弁口を閉止することができると共に、弁
体の偏摩耗を防止して長期にわたり弁漏れが生じないよ
うにすることである。Accordingly, the technical problem of the present invention is to prevent the valve opening from closing even if the guide rod is eccentric, and to prevent the valve body from being worn unevenly so that valve leakage does not occur for a long time. It is to be.
【０００７】[0007]
【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
で入口と弁口と出口を形成し、弁口に対向して弁体を配
置し、該弁体と協働する圧力応動部材を設け、該圧力応
動部材の一面に出口側の圧力を負荷させ、他面に圧力設
定手段の設定力を負荷させて、出口側の圧力が所定値よ
りも低下すると圧力応動部材が変位して弁体を開弁せし
めて入口側の高圧流体を出口側に供給して出口側の圧力
の回復を図り、出口側の圧力が所定値まで回復すると弁
体が閉弁することによって、出口側を所望の減圧状態に
維持する減圧弁において、弁体の下部に別体で形成した
弁軸を設けて、両者を略半球面と略円錐面で接合すると
共に、弁軸中央部に貫通孔を形成し、該貫通孔内に弁体
の下端部に延設した弁棒を遊嵌し、上記弁軸を弁ケ―シ
ングに形成した弁軸ガイドに摺動自在に嵌め合せて配置
し、上記弁軸もしくは弁体をばねで弁口方向に付勢した
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 to form an inlet, a valve port and an outlet by valve casing, and to face the valve port. A valve body is disposed, a pressure responsive member cooperating with the valve body is provided, an outlet side pressure is applied to one surface of the pressure responsive member, and a setting force of a pressure setting means is applied to the other surface, and an outlet side is provided. When the pressure falls below a predetermined value, the pressure responsive member is displaced to open the valve body and supply the high pressure fluid on the inlet side to the outlet side to recover the pressure on the outlet side, and the pressure on the outlet side becomes the predetermined value. When the valve recovers to the value, the valve body closes, and in the pressure reducing valve that maintains the outlet side in a desired reduced pressure state, a valve shaft formed separately is provided below the valve body, and both are substantially semispherical. At the same time, they are joined by a conical surface, a through hole is formed in the center of the valve shaft, and the lower end of the valve body is extended into the through hole. A valve rod is loosely fitted, the valve shaft is slidably fitted to a valve shaft guide formed in a valve case, and the valve shaft or valve body is urged in the valve opening direction by a spring. is there.
【０００８】[0008]
【作用】上記の技術的手段の作用は下記の通りである。
弁体はばねで直接あるいは弁軸を介して弁口方向に弾性
的に付勢されており、圧力応動部材の作用がなければば
ねの力と入口側の流体圧力により弁口面に当接してい
る。出口側の圧力が圧力設定手段による設定値よりも低
くなれば圧力応動部材が変位して弁体を開弁する。弁体
が開弁する場合、弁軸と略半球面及び略円錐面で接合
し、弁軸中央部の貫通孔に弁棒が遊嵌状態で配置されて
いることにより、弁体は弁軸に対して弁棒の遊嵌の分だ
け変位可能な状態で開弁する。従って、弁棒を遊嵌しな
い場合のように弁体が流体の流れの影響により大きく傾
いて開弁することがない。二次側の圧力が設定値に達す
れば圧力応動部材は元の位置に変位する。弁体はばねと
流体圧力で弁口方向に押し上げられる。このとき弁体は
流れの影響を受けて大きく傾いていないので弁口に対し
て衝撃的な着座をすることなく、弁面全体がほぼ同時に
着座する。弁軸が弁軸ガイドに対して多少偏芯しても、
弁体とは略半球面及び略円錐面で接合していることによ
り、弁体は弁棒の遊嵌の範囲で偏芯可能であり、弁口面
に密着する。The operation of the above technical means is as follows.
The valve body is elastically urged in the valve opening direction directly by a spring or through a valve shaft.If there is no action of the pressure responsive member, the valve body contacts the valve opening surface by the force of the spring and the fluid pressure on the inlet side. I have. When the pressure on the outlet side becomes lower than the value set by the pressure setting means, the pressure responsive member is displaced to open the valve. When the valve element is opened, the valve element is joined to the valve shaft by a substantially hemispherical surface and a substantially conical surface, and the valve rod is arranged in a through hole in the center portion of the valve shaft in a loosely fitted state, so that the valve body is attached to the valve shaft. On the other hand, the valve is opened in a state where it can be displaced by the amount of loose fitting of the valve stem. Therefore, unlike the case where the valve stem is not loosely fitted, the valve body does not open with a large inclination due to the influence of the fluid flow. When the pressure on the secondary side reaches the set value, the pressure responsive member is displaced to the original position. The valve body is pushed up toward the valve port by a spring and fluid pressure. At this time, since the valve body is not greatly inclined due to the influence of the flow, the entire valve surface is seated almost simultaneously without a shocking seat against the valve port. Even if the valve shaft is slightly eccentric with respect to the valve shaft guide,
Since the valve body and the valve body are joined by a substantially hemispherical surface and a substantially conical surface, the valve body can be eccentric within the range of the loose fit of the valve rod, and is in close contact with the valve port surface.
【０００９】[0009]
【発明の効果】弁体と弁軸を略半球面と略円錐面で接合
したことにより、両者は偏芯可能となり、弁軸の偏芯の
影響を弁体が直接受けることがなく、弁漏れを防止する
ことができると共に、弁体の弁棒と弁軸の貫通孔とを遊
嵌して配置したことにより、弁体が開弁時、特に全開時
に大きく傾くことがなく、閉弁時においては弁面全体が
ほぼ同時に着座して弁面を傷付けることがないために、
長期にわたり弁漏れを防止することができる。Since the valve body and the valve shaft are joined by a substantially hemispherical surface and a substantially conical surface, the two can be eccentric, and the valve body is not directly affected by the eccentricity of the valve shaft, and the valve leaks. Can be prevented, and the valve stem of the valve body and the through hole of the valve shaft are loosely fitted to each other, so that the valve body does not greatly tilt when the valve is opened, particularly when fully opened, and when the valve is closed. Because the whole valve surface does not sit at almost the same time and damage the valve surface,
Valve leakage can be prevented for a long time.
【００１０】[0010]
【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に弁部の主要部を示す。弁ケ―シング１で
図示しない入口に連通する入口部２と、出口に連通する
出口部３と、弁口４を形成する。弁口４は弁ケ―シング
１に弁座５をねじ結合した中央部に設ける。弁口４に対
向して円板状の弁体１２を配置する。弁座５の下端面と
弁体１２の上端面をシ―ル面とする。弁体１２の下部は
略半球面１３に形成し、略半球面１３の下部に棒状の弁
棒１８を延設すると共に、上部には連結棒１５を設け
る。弁体１２の略半球面１３に対向して弁軸１６の略円
錐面１７を接合する。弁軸１６は、略円錐面１７の下方
に貫通孔１９を形成して上記弁棒１８を遊嵌すると共
に、上端には段部２５を形成する。弁軸１６の下部は軸
状に形成し、弁ケ―シング１に取り付けた弁軸ガイド２
０のガイド孔２１内に摺動自在に配置する。弁軸ガイド
２０と弁軸１６の段部２５との間に、弁軸１６及び接合
部を介して弁体１２を弁口４方向に付勢するコイルバネ
２２を設ける。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described. FIG. 1 shows a main part of the valve section. The valve casing 1 forms an inlet 2 communicating with an inlet (not shown), an outlet 3 communicating with an outlet, and a valve port 4. The valve port 4 is provided at the center where the valve seat 5 is screwed to the valve casing 1. A disc-shaped valve body 12 is arranged facing the valve port 4. The lower end surface of the valve seat 5 and the upper end surface of the valve element 12 are used as a seal surface. The lower part of the valve body 12 is formed in a substantially hemispherical surface 13, a rod-shaped valve rod 18 is extended below the substantially hemispherical surface 13, and a connecting rod 15 is provided on the upper part. The substantially conical surface 17 of the valve shaft 16 is joined to the substantially hemispherical surface 13 of the valve body 12. The valve shaft 16 has a through hole 19 formed below the substantially conical surface 17 to loosely fit the valve rod 18 and a step 25 at the upper end. The lower portion of the valve shaft 16 is formed in a shaft shape, and the valve shaft guide 2 attached to the valve case 1 is provided.
0 is slidably disposed in the guide hole 21. A coil spring 22 is provided between the valve shaft guide 20 and the step 25 of the valve shaft 16 to urge the valve body 12 in the direction of the valve port 4 via the valve shaft 16 and the joint.
【００１１】出口部３の上部にピストン６をシリンダ―
７内に配置する。ピストン６にピストンリング８とテン
ションリング９を取り付けると共に、ピストン６の下部
は略半球状１０として操作棒１１を延設する。操作棒１
１の下端は、球面状とすると共に、弁体１２に設けた連
結棒１５と接する。ピストン６の中央部にはピストンの
上面と下面を連通する連通孔２３を形成する。A piston 6 is mounted on a cylinder above the outlet 3.
7. A piston ring 8 and a tension ring 9 are attached to the piston 6, and a lower part of the piston 6 has a substantially hemispherical shape 10 and an operation rod 11 is extended. Operation stick 1
The lower end of 1 has a spherical shape and is in contact with a connecting rod 15 provided on the valve body 12. A communication hole 23 that connects the upper surface and the lower surface of the piston is formed in the center of the piston 6.
【００１２】次に作用を説明する。図示しない圧力応動
部に負荷している圧力設定手段の設定力と、出口側部３
の圧力とのバランスがくずれた場合、すなわち、出口側
部３の圧力が所定値よりも低下した場合、図示しない圧
力応動部材が変位して同じく図示しないパイロット弁を
開弁して、高圧の入口側部２の流体をピストン６の上面
に供給する。高圧流体によりピストン６は下方に変位
し、弁体１２も下方に変位して弁口４を開口し、出口側
部３に入口側部２の高圧流体が補給されて圧力の回復を
図る。この場合、弁体１２の弁棒１８が弁軸１６の貫通
孔１９に遊嵌されているために流下する流体の流れが激
しいものであっても、大きく傾くことがない。Next, the operation will be described. The setting force of the pressure setting means, which is applied to a pressure response unit (not shown), and the outlet side 3
When the pressure is out of balance with the pressure, that is, when the pressure at the outlet side portion 3 becomes lower than a predetermined value, the pressure responsive member (not shown) is displaced to open the pilot valve (not shown), and the high pressure inlet is opened. The fluid of the side 2 is supplied to the upper surface of the piston 6. The piston 6 is displaced downward by the high-pressure fluid, the valve body 12 is also displaced downward to open the valve port 4, and the high-pressure fluid of the inlet side 2 is supplied to the outlet side 3 to recover the pressure. In this case, since the valve stem 18 of the valve body 12 is loosely fitted in the through hole 19 of the valve shaft 16, even if the flowing fluid flows intensely, it does not tilt significantly.
【００１３】出口側部３が所定圧力になると、圧力応動
部が元の位置に戻り、パイロット弁が閉弁して、ピスト
ン６上面への高圧流体の供給が停止され、ピストン６上
面の圧力が連通孔２３から排出されることにより、弁体
１２及び弁軸１６はコイルバネ２２と入出口の圧力差に
より弁座５のシ―ル面に密着する。この場合、弁体１２
は大きく傾いておらず、弁座５に対してほぼ全面が同時
に着座することにより、一端を支点とした衝撃的な着座
をすることがなく、偏摩耗を生じることがない。また、
弁軸１６が弁軸ガイド２０のガイド孔を摺動するための
隙間分の偏芯をしたとしても、弁体１２と弁軸１６は略
半球面１３と略円錐面１７とで接合されているために、
弁体１２は偏芯可能であり、弁軸１６の偏芯を吸収して
弁座５のシ―ル面に確実に密着して漏れを防止する。When the outlet side 3 reaches a predetermined pressure, the pressure responsive section returns to the original position, the pilot valve closes, the supply of high-pressure fluid to the upper surface of the piston 6 is stopped, and the pressure on the upper surface of the piston 6 is reduced. By being discharged from the communication hole 23, the valve body 12 and the valve shaft 16 come into close contact with the seal surface of the valve seat 5 due to the pressure difference between the coil spring 22 and the inlet / outlet. In this case, the valve element 12
Is not largely inclined, and almost the entire surface is seated on the valve seat 5 at the same time, so that there is no impact seating with one end as a fulcrum, and uneven wear does not occur. Also,
Even if the valve shaft 16 is eccentric by a gap for sliding in the guide hole of the valve shaft guide 20, the valve body 12 and the valve shaft 16 are joined by the substantially hemispherical surface 13 and the substantially conical surface 17. for,
The valve body 12 can be eccentric, absorbs the eccentricity of the valve shaft 16 and securely adheres to the seal surface of the valve seat 5 to prevent leakage.
【００１４】本実施例においては、弁軸１６の中央部に
貫通孔１９を設けたことにより、弁体１２と弁軸１６の
略半球面と略円錐面との接合部に、流体中のゴミや錆等
の異物が入り込んでも、貫通孔１９内を落下してしまう
ために、接合部における異物の噛み込みはなくなり、滑
らかな接合状態を維持することができる。また本実施例
においては、ピストン６と弁体１２とを、操作棒１１と
連結棒１５を介して接合したが、ピストン６の操作棒１
１を延設することにより、連結棒１５をなくして、弁体
１２の表面中心部と接合することもできる。この場合、
操作棒１１の下端を凹や凸の球面や円錐面あるいは平面
として、弁体１２の対向面を凸や凹の球面や円錐面ある
いは平面として接合することもできる。In the present embodiment, the through hole 19 is provided at the center of the valve shaft 16 so that the joint between the valve body 12 and the substantially hemispherical surface and the substantially conical surface of the valve shaft 16 has dust in the fluid. Even if foreign matter such as rust or rust enters, the foreign matter falls in the through hole 19, so that the foreign matter does not bite at the joining portion, and a smooth joining state can be maintained. Further, in the present embodiment, the piston 6 and the valve body 12 are joined via the operation rod 11 and the connection rod 15, but the operation rod 1
By extending 1, it is also possible to eliminate the connecting rod 15 and join it to the center of the surface of the valve element 12. in this case,
The lower end of the operation rod 11 may be joined as a concave or convex spherical surface, conical surface or flat surface, and the opposing surface of the valve element 12 may be joined as a convex or concave spherical surface, conical surface or flat surface.
【図１】図１は本発明による減圧弁の弁体案内構造の部
分断面図である。FIG. 1 is a partial sectional view of a valve body guiding structure of a pressure reducing valve according to the present invention.
１ 弁ケ―シング ２ 入口側部 ３ 出口側部 ４ 弁口 ５ 弁座 ６ ピストン １２ 弁体 １３ 略半球面 １６ 弁軸 １７ 略円錐面 １８ 弁棒 １９ 貫通孔 ２０ 弁軸ガイド ２２ コイルバネ DESCRIPTION OF SYMBOLS 1 Valve casing 2 Inlet side part 3 Outlet side part 4 Valve port 5 Valve seat 6 Piston 12 Valve 13 Substantially hemispherical surface 16 Valve shaft 17 Substantially conical surface 18 Valve stem 19 Through hole 20 Valve shaft guide 22 Coil spring
Claims (1)
し、弁口に対向して弁体を配置し、該弁体と協働する圧
力応動部材を設け、該圧力応動部材の一面に出口側の圧
力を負荷させ、他面に圧力設定手段の設定力を負荷させ
て、出口側の圧力が所定値よりも低下すると圧力応動部
材が変位して弁体を開弁せしめて入口側の高圧流体を出
口側に供給して出口側の圧力の回復を図り、出口側の圧
力が所定値まで回復すると弁体が閉弁することによっ
て、出口側を所望の減圧状態に維持する減圧弁におい
て、弁体の下部に別体で形成した弁軸を設けて、両者を
略半球面と略円錐面で接合すると共に、弁軸中央部に貫
通孔を形成し、該貫通孔内に弁体の下端部に延設した弁
棒を遊嵌し、上記弁軸を弁ケ―シングに形成した弁軸ガ
イドに摺動自在に嵌め合せて配置し、上記弁軸もしくは
弁体をばねで弁口方向に付勢した減圧弁の弁体案内構
造。An inlet, a valve port, and an outlet are formed by valve casing, a valve body is disposed opposite the valve port, and a pressure responsive member cooperating with the valve body is provided. The pressure on the outlet side is applied to one surface, and the setting force of the pressure setting means is applied to the other surface. When the pressure on the outlet side falls below a predetermined value, the pressure responsive member is displaced to open the valve body and open the inlet. A high-pressure fluid is supplied to the outlet side to recover the pressure on the outlet side, and when the pressure on the outlet side recovers to a predetermined value, the valve body closes, so that the outlet side is maintained at a desired reduced pressure state. In the valve, a separately formed valve shaft is provided below the valve body, and both are joined by a substantially hemispherical surface and a substantially conical surface, and a through hole is formed in the center of the valve shaft, and the valve is provided in the through hole. A valve stem extending from the lower end of the body is loosely fitted, and the valve shaft is slidably fitted into a valve shaft guide formed in a valve casing. And a valve body guide structure of the pressure reducing valve in which the valve shaft or the valve body is urged toward the valve opening by a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30225391A JP2665846B2 (en) | 1991-10-21 | 1991-10-21 | Valve body guide structure of pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30225391A JP2665846B2 (en) | 1991-10-21 | 1991-10-21 | Valve body guide structure of pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05113828A JPH05113828A (en) | 1993-05-07 |
| JP2665846B2 true JP2665846B2 (en) | 1997-10-22 |
Family
ID=17906793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30225391A Expired - Fee Related JP2665846B2 (en) | 1991-10-21 | 1991-10-21 | Valve body guide structure of pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2665846B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5202117B2 (en) | 2008-06-10 | 2013-06-05 | 藤倉ゴム工業株式会社 | Pressure reducing valve |
| JP6769840B2 (en) | 2016-11-15 | 2020-10-14 | 株式会社ジェイテクト | Pressure reducing valve device |
-
1991
- 1991-10-21 JP JP30225391A patent/JP2665846B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05113828A (en) | 1993-05-07 |
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