JPS625684Y2 - - Google Patents
Info
- Publication number
- JPS625684Y2 JPS625684Y2 JP1436980U JP1436980U JPS625684Y2 JP S625684 Y2 JPS625684 Y2 JP S625684Y2 JP 1436980 U JP1436980 U JP 1436980U JP 1436980 U JP1436980 U JP 1436980U JP S625684 Y2 JPS625684 Y2 JP S625684Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- valve
- chamber
- pilot gas
- pressure
- 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
Links
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Control Of Fluid Pressure (AREA)
Description
【考案の詳細な説明】
本考案は、空気等のガス体を取扱うダイヤフラ
ム式の減圧弁に関するものである。[Detailed Description of the Invention] The present invention relates to a diaphragm type pressure reducing valve that handles gas such as air.
すなわち、弁体を開閉動するためのダイヤフラ
ムの上室に、パイロツトガスをパイロツト弁によ
つて所定の制御操作圧に調節して導入する一方、
ダイヤフラム下室に二次側圧力を導入し、二次側
の圧力が所定の目標値より低いときにはダイヤフ
ラム上室におけるパイロツトガス圧によつて弁体
を開き、二次側の圧力が所定の目標値より高いと
きには当該二次圧で弁体を閉じて、二次圧を目標
値に調節制御するようにしたダイヤフラム式の減
圧弁において、該減圧弁における調節制御の作動
の安定性を向上する一方、この減圧弁を緊急時等
においてダイヤフラム上室のパイロツトガス圧を
放出して急閉するとき、ダイヤフラムの動きによ
つて急閉不能になることを防止するものである。 That is, pilot gas is adjusted to a predetermined control operating pressure by the pilot valve and introduced into the upper chamber of the diaphragm for opening and closing the valve body.
Secondary pressure is introduced into the lower chamber of the diaphragm, and when the pressure on the secondary side is lower than a predetermined target value, the valve body is opened by the pilot gas pressure in the upper chamber of the diaphragm, and the pressure on the secondary side reaches the predetermined target value. In a diaphragm type pressure reducing valve that adjusts and controls the secondary pressure to a target value by closing the valve body at the secondary pressure when the pressure is higher, the present invention improves the stability of the adjustment control operation in the pressure reducing valve, and When this pressure reducing valve is suddenly closed by releasing the pilot gas pressure in the upper chamber of the diaphragm in an emergency, etc., this prevents the valve from becoming unable to close quickly due to the movement of the diaphragm.
以下、実施例の図面について説明するに、図に
おいて１は一次配管２に接続する入口部４と二次
配管３に接続する出口部５とを有する弁箱で、そ
の内部において下部の一次弁室６と上部の二次弁
室７とを区成する隔壁８には両弁室６，７を連通
する弁座９を設け、一次弁室６には該弁座９にば
ね１０にて常時押圧付勢される弁体１１を設ける
一方、弁箱１の上面には、二次弁室７との間に隔
壁兼用のガイド体１２を挟んで上面開放型のダイ
ヤフラムケース１３を取付け、該ダイヤフラムケ
ース１３とその上面に取付けたダイヤフラムカバ
ー１４との間には可撓性の膜体で形成したダイヤ
フラム１５を介挿して、その内部をダイヤフラム
上室１６とダイヤフラム下室１７とに区成し、前
記弁体１１に連結した弁棒１８を、前記ガイド体
１２を摺動自在に貫通したのちダイヤフラム下室
１７内に突出して、その突出端には前記ダイヤフ
ラム１５の下面に接当する円板状のダイヤフラム
受体１９を取付ける一方、ダイヤフラム下室１７
を前記ガイド体１２に設けた通孔２０及びパイプ
２１を介して二次弁室７に連通する。 Hereinafter, to explain the drawings of the embodiment, in the drawings, 1 is a valve box having an inlet part 4 connected to the primary pipe 2 and an outlet part 5 connected to the secondary pipe 3, and inside the valve box, a lower primary valve chamber is provided. 6 and an upper secondary valve chamber 7 is provided with a valve seat 9 that communicates both valve chambers 6 and 7, and the valve seat 9 in the primary valve chamber 6 is constantly pressed by a spring 10. A energized valve body 11 is provided, and a top-open diaphragm case 13 is attached to the top surface of the valve box 1 with a guide body 12 that also serves as a partition between it and the secondary valve chamber 7. A diaphragm 15 formed of a flexible membrane is inserted between the diaphragm cover 14 and the diaphragm cover 14 attached to the upper surface of the diaphragm 13, and the inside thereof is divided into an upper diaphragm chamber 16 and a lower diaphragm chamber 17. A valve rod 18 connected to the valve body 11 is slidably passed through the guide body 12 and then protrudes into the diaphragm lower chamber 17, and has a disc-shaped disc at its protruding end that contacts the lower surface of the diaphragm 15. While installing the diaphragm receiver 19, the diaphragm lower chamber 17
is communicated with the secondary valve chamber 7 via a through hole 20 provided in the guide body 12 and a pipe 21.
そして、前記ダイヤフラムカバー１４の中心に
はパイロツトガス圧の導入ポート２２を設け、且
つダイヤフラムカバー１４の内面の中心部には、
前記パイロツトガス圧導入ポート２２が開口する
凹所２３を刻設すると共に、該凹所２３を塞ぐよ
うにした薄い平面板状のストツパー板２４を設
け、更にダイヤフラムカバー１４の内面には、前
記凹所２３を前記ストツパー板２４の外周部にお
いてダイヤフラム上室１６と連通するための溝２
５を放射方向に複数条刻設して成るものである。
なお、符号２９はダイヤフラム受リングである。 A pilot gas pressure introduction port 22 is provided at the center of the diaphragm cover 14, and a pilot gas pressure introduction port 22 is provided at the center of the inner surface of the diaphragm cover 14.
A recess 23 through which the pilot gas pressure introduction port 22 opens is provided, and a stopper plate 24 in the form of a thin flat plate is provided to close the recess 23. A groove 2 for communicating the diaphragm upper chamber 16 with the diaphragm upper chamber 16 at the outer peripheral portion of the stopper plate 24.
5 are provided in a plurality of stripes in the radial direction.
In addition, the code|symbol 29 is a diaphragm receiving ring.
このように構成した減圧弁における目標二次圧
力は、そのダイヤフラム上室１６に導入するパイ
ロツトガス圧にて設定される。このパイロツトガ
ス圧は、一次配管２又は別の圧力源と前記パイロ
ツトガス導入ポート２２とをつなぐパイロツトガ
ス配管２６中に設けた従来公知のパイロツト弁２
７によつて設定される。二次弁室７内の二次圧力
がパイロツト弁２７による設定圧より低いときに
は、弁体１１はダイヤフラム上室１６内のパイロ
ツトガス圧によつてダイヤフラム１５及び弁棒１
８を介して押し下げられて開くことになり、ま
た、二次弁室７内の二次圧力がパイロツト弁２７
による設定圧より高いときには、弁体１１はダイ
ヤフラム下室１７の二次圧によつてダイヤフラム
１５によつて上昇して閉じる作用を行なつて、二
次圧力が所定の目標値に自動的に調節制御され
る。 The target secondary pressure in the pressure reducing valve configured as described above is set by the pilot gas pressure introduced into the upper chamber 16 of the diaphragm. This pilot gas pressure is supplied through a conventionally known pilot valve 2 provided in a pilot gas pipe 26 that connects the primary pipe 2 or another pressure source to the pilot gas introduction port 22.
7. When the secondary pressure in the secondary valve chamber 7 is lower than the set pressure by the pilot valve 27, the valve body 11 is moved to the diaphragm 15 and the valve stem 1 by the pilot gas pressure in the diaphragm upper chamber 16.
The pilot valve 27 is pushed down and opened via the pilot valve 8, and the secondary pressure in the secondary valve chamber 7 is
When the pressure is higher than the set pressure, the valve body 11 is raised and closed by the diaphragm 15 due to the secondary pressure in the diaphragm lower chamber 17, and the secondary pressure is automatically adjusted to a predetermined target value. controlled.
そして、この制御作動中において、事故等に際
して減圧弁を急閉するときには、前記パイロツト
ガス配管２６中に設けた三方電磁弁２８によつて
パイロツトガス配管２６を大気に開放し、ダイヤ
フラム上室１６内のパイロツトガス圧を放出する
ことにより、弁体１１はダイヤフラム下室１７内
の二次圧力によつて上昇して急閉する。この急閉
時においてダイヤフラム１５は二次圧力によつて
そのダイヤフラム受体１９より離れて膨れるが、
ダイヤフラムカバー１４の内面にはストツパー板
２４が設けられているから、ダイヤフラム１５は
これに接当してその大きな膨れが規制防止され
る。 During this control operation, when the pressure reducing valve is suddenly closed in the event of an accident, the pilot gas pipe 26 is opened to the atmosphere by the three-way solenoid valve 28 provided in the pilot gas pipe 26, and the inside of the diaphragm upper chamber 16 is closed. By releasing the pilot gas pressure, the valve body 11 is raised by the secondary pressure in the diaphragm lower chamber 17 and suddenly closed. During this sudden closing, the diaphragm 15 swells away from its diaphragm receiver 19 due to the secondary pressure;
Since a stopper plate 24 is provided on the inner surface of the diaphragm cover 14, the diaphragm 15 comes into contact with the stopper plate 24, so that large swelling of the diaphragm 15 is prevented.
このような減圧弁において本考案は、ダイヤフ
ラムケース１３とダイヤフラムカバー１４との間
に介挿したダイヤフラム１５の下面に、弁体１１
の弁棒１８上端に取付けた円面板状ダイヤフラム
受体１９を接当してダイヤフラム１５の上面に何
物も突出しない構成にしたこと、及びダイヤフラ
ム１５が接当するストツパー板２４を薄い平板状
に構成したことにより、弁体１１の所要の弁リフ
トを保つた状態の下で、パイロツトガスが入るダ
イヤフラム上室１６の容積を小さくすることがで
きる。 In such a pressure reducing valve, the present invention provides a valve body 11 on the lower surface of the diaphragm 15 inserted between the diaphragm case 13 and the diaphragm cover 14.
The circular plate-shaped diaphragm receiver 19 attached to the upper end of the valve stem 18 is brought into contact with the valve so that nothing protrudes from the upper surface of the diaphragm 15, and the stopper plate 24 on which the diaphragm 15 comes into contact is made into a thin flat plate. With this structure, the volume of the diaphragm upper chamber 16 into which the pilot gas enters can be reduced while maintaining the required valve lift of the valve body 11.
この場合、ダイヤフラム上室１６の容積が大き
いと、パイロツトガスの圧縮・膨張によるクツシ
ヨン性が大で、ダイヤフラム１５の上下動がこの
クツシヨン性により大きくなるので、弁体も大き
く上下動して作動が大きくなり過ぎて不安定にな
るが、本考案によれば上記の構成によつて、ダイ
ヤフラム上室１６の容積を小さくできるので、ダ
イヤフラム１５のパイロツトガスの圧縮・膨張に
よる上下動ひいては弁体１１の上下動は小さくな
つてダイヤフラムによる調節制御が安定になるの
である。 In this case, if the volume of the diaphragm upper chamber 16 is large, the compression and expansion of the pilot gas will result in a large cushioning property, and the vertical movement of the diaphragm 15 will increase due to this cushioning property, so the valve body will also move up and down significantly, making it difficult to operate. However, according to the present invention, the volume of the upper chamber 16 of the diaphragm can be reduced due to the above structure, so that the vertical movement of the diaphragm 15 due to the compression and expansion of the pilot gas and the valve body 11 are prevented. The vertical movement is reduced and the adjustment control by the diaphragm becomes stable.
また、本考案は、ダイヤフラムカバー１４の内
面に、前記平面状ストツパー板２４で塞いだ凹所
２３から放射状に延びる溝２５を設けて、パイロ
ツトガス圧導入ポート２２を前記ストツパー板２
４より外周部でダイヤフラム上室２６に連通した
ので、緊急等に際しての減圧弁の急閉時に、ダイ
ヤフラム１５がダイヤフラム下室１７内の二次圧
力によつてストツパー板２４に押付けられても、
パイロツトガス圧導入ポート２２とダイヤフラム
上室１６との連通状態はダイヤフラムによつて塞
がれることがない。従つて、ダイヤフラム上室１
６内のパイロツトガスは的確に排出できて、緊急
等における減圧弁の閉動が確実に達成できるので
あり、しかも、ダイヤフラム上室１６の容積が小
さいことは、当該ダイヤフラム上室１６内のパイ
ロツトガスの排出が早くできるから、減圧弁の閉
動の速度が早くなつて確実に急閉できるのであ
る。 Further, the present invention provides a groove 25 radially extending from the recess 23 closed by the planar stopper plate 24 on the inner surface of the diaphragm cover 14, so that the pilot gas pressure introduction port 22 is connected to the stopper plate 24.
4 communicates with the upper diaphragm chamber 26 at the outer periphery, so even if the diaphragm 15 is pressed against the stopper plate 24 by the secondary pressure in the lower diaphragm chamber 17 when the pressure reducing valve is suddenly closed in an emergency, etc.
The communication state between the pilot gas pressure introduction port 22 and the diaphragm upper chamber 16 is not blocked by the diaphragm. Therefore, the upper diaphragm chamber 1
The pilot gas in the diaphragm upper chamber 16 can be discharged accurately, and the closing of the pressure reducing valve can be reliably achieved in an emergency.Moreover, the small volume of the diaphragm upper chamber 16 means that the pilot gas in the diaphragm upper chamber 16 can be discharged accurately. Since the gas can be discharged quickly, the closing speed of the pressure reducing valve becomes faster and it can be closed quickly and reliably.
以上の通り本考案によれば、減圧弁における制
御作動を安定にすることができるから、その制御
特性を向上できると共に、緊急時等における急閉
が確実にできて、緊急時等に対する信頼性を向上
できる効果を有する。 As described above, according to the present invention, the control operation of the pressure reducing valve can be stabilized, so its control characteristics can be improved, and rapid closing can be ensured in an emergency, improving reliability in an emergency. It has the effect of improving.
図面は本考案の実施例を示し、第１図は縦断正
面図、第２図は第１図の−視断面図である。
１……弁箱、６……一次弁室、７……二次弁
室、９……弁座、１１……弁体、１８……弁棒、
１３……ダイヤフラムケース、１４……ダイヤフ
ラムカバー、１５……ダイヤフラム、１６……ダ
イヤフラム上室、１７……ダイヤフラム下室、１
９……ダイヤフラム受体、２２……パイロツトガ
ス圧導入ポート、２４……ストツパー板、２５…
…溝。
The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal sectional front view and FIG. 2 being a sectional view taken from the side of FIG. 1. 1...Valve box, 6...Primary valve chamber, 7...Secondary valve chamber, 9...Valve seat, 11...Valve body, 18...Valve stem,
13...Diaphragm case, 14...Diaphragm cover, 15...Diaphragm, 16...Diaphragm upper chamber, 17...Diaphragm lower chamber, 1
9...Diaphragm receiver, 22...Pilot gas pressure introduction port, 24...Stopper plate, 25...
…groove.
Claims (1)
イヤフラムケースとその上面に取付くダイヤフラ
ムカバーとの間にダイヤフラムを介挿して、その
上部室をパイロツトガス圧が導入されるダイヤフ
ラム上室に、下部室を前記二次弁室に連通するダ
イヤフラム下室に各々形成し、前記弁箱内に一次
弁室と二次弁室とを連通する弁座に対して設けた
弁体の弁棒を、前記ダイヤフラム下室内に摺動自
在に突出し、その突出端に設けた円板状ダイヤフ
ラム受体を前記ダイヤフラムの下降動によつて弁
体が開くようにダイヤフラムの下面に接当する一
方、前記ダイヤフラムカバーの内面には、前記パ
イロツトガス圧導入ポートを塞ぐ薄い平面板状の
ダイヤフラムストツパー板を設けると共に、前記
パイロツトガス圧導入ポートを前記ストツパー板
の外周部においてダイヤフラム上室に連通するた
めの溝を設けて成る減圧弁装置。 A diaphragm is inserted between a diaphragm case attached to a valve box having a primary valve chamber and a secondary valve chamber and a diaphragm cover attached to the upper surface of the diaphragm case, and the upper chamber is connected to the upper chamber of the diaphragm into which pilot gas pressure is introduced. , a lower chamber is formed in the diaphragm lower chamber communicating with the secondary valve chamber, and a valve stem of a valve body is provided in the valve box with respect to a valve seat communicating the primary valve chamber and the secondary valve chamber. , a disc-shaped diaphragm receiver that slidably protrudes into the lower chamber of the diaphragm and is provided at its protruding end is brought into contact with the lower surface of the diaphragm so that the valve body opens by the downward movement of the diaphragm; The inner surface of the cover is provided with a diaphragm stopper plate in the form of a thin flat plate for blocking the pilot gas pressure introduction port, and a groove for communicating the pilot gas pressure introduction port with the upper chamber of the diaphragm at the outer periphery of the stopper plate. A pressure reducing valve device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1436980U JPS625684Y2 (en) | 1980-02-06 | 1980-02-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1436980U JPS625684Y2 (en) | 1980-02-06 | 1980-02-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56118410U JPS56118410U (en) | 1981-09-10 |
| JPS625684Y2 true JPS625684Y2 (en) | 1987-02-09 |
Family
ID=29610865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1436980U Expired JPS625684Y2 (en) | 1980-02-06 | 1980-02-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS625684Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170212U (en) * | 1984-10-09 | 1986-05-14 | ||
| US8240327B2 (en) * | 2008-04-21 | 2012-08-14 | Emerson Process Management Regulator Technologies, Inc. | Pressure loaded service regulator with pressure balanced trim |
| CN103711981B (en) * | 2012-10-01 | 2018-07-24 | 艾默生过程管理调节技术公司 | The dynamic pressure recording device and over-pressure safety device of actuator for internal record |
| JP7424322B2 (en) * | 2021-01-19 | 2024-01-30 | Smc株式会社 | fluid pressure control device |
-
1980
- 1980-02-06 JP JP1436980U patent/JPS625684Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56118410U (en) | 1981-09-10 |
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