JPS59190587A - High differential pressure control valve - Google Patents
High differential pressure control valveInfo
- Publication number
- JPS59190587A JPS59190587A JP6447483A JP6447483A JPS59190587A JP S59190587 A JPS59190587 A JP S59190587A JP 6447483 A JP6447483 A JP 6447483A JP 6447483 A JP6447483 A JP 6447483A JP S59190587 A JPS59190587 A JP S59190587A
- Authority
- JP
- Japan
- Prior art keywords
- stem
- cage
- differential pressure
- valve
- high differential
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔うれ明の技術外野〕
本発明は火力、ノ京子力発′颯所で使用さ几るプロセス
制却用の高差圧調節弁の改良［ＩＲＩするものでめる０
〔発明の技術的背景とその問題点〕
一般にプロセス制御に用いる高差圧調節弁は高圧、高温
、強腐食性流体の制御等苛酷な条件下で使用されること
が多いのでトラブルが多く、例えば升の７一ト部からの
リークによる弁体や配管の侵蝕が発生すると、七′ｒｌ
−に伴なって計画外の流れが発生シフロセスに外乱を与
える。従来のプロセス′訓御に１吏用している高差圧調
節弁は、属１図ｒ（示すようにポジ／ヨナー１からの信
号は操作空気＠２を通ってアクチェータ３に入り、ステ
ム４およびこの先端のプラグ５を駆動し、プラグ５に設
けたプラグノートロとこのプラグノートに対面するバル
ブボディ側に設けた／−トリング７とにより構成ざｒし
るオリフィス部８の面積を増減することによシ流重を制
御するものでちる。[Detailed description of the invention] [Ureme's technical field] The present invention is an improvement of a high differential pressure regulating valve for process control used in thermal power plants and Nokyo power plants. 0 [Technical background of the invention and its problems] Generally, high differential pressure regulating valves used for process control are often used under harsh conditions such as high pressure, high temperature, and control of strongly corrosive fluids, so they often cause trouble. For example, if the valve body or piping is eroded due to leakage from the 7th part of the 7'rl
-The unplanned flow causes disturbance to the generated syphrocess. The high differential pressure regulating valve used in conventional process control is as shown in Figure 1 (as shown in Fig. The plug 5 at the tip is driven to increase or decrease the area of the orifice portion 8 formed by the plug nozzle provided on the plug 5 and the /-tring 7 provided on the valve body side facing the plug nozzle. In particular, it is used to control the flow weight.
このような構造の調節弁を高差圧条件域において使用す
ると、流体がオリフィス部８で急激に絞られて速度が急
上昇することにょ９圧カが急降下して流体の飽和蒸気圧
力に丑で達して液体の一部が沸騰して気化する場合がら
る。こうして形成された気泡は液流とともに下流側に運
ばれるが、下流では通過面積が大きくなるので流体は減
速され一時的に降下した圧力は復帰する。この復帰した
圧力がｌｉｌ和圧力よシ低い場合は７ラソシングとなり
、逆ｒ（尚い場合にはキヤビテーシヨンとなる。When a control valve with such a structure is used in a high differential pressure range, the fluid is rapidly throttled at the orifice portion 8 and the velocity rapidly increases, causing the pressure to drop rapidly and reaching the saturated vapor pressure of the fluid. This happens when some of the liquid boils and evaporates. The bubbles thus formed are carried downstream along with the liquid flow, but since the passing area becomes larger downstream, the fluid is decelerated and the temporarily lowered pressure returns. If this restored pressure is lower than the lil sum pressure, it will be 7 lasoring, and if not, it will be cavitation.
キャビテーションが発生すると騒音や振動が生じて謂節
弁本体や配管が損傷する原因となる。このキャビチー／
ジン対策としては一般的にノートリング７とプラグ７−
ト６にステライト盛りを施しであるが、これはこ九らの
部分が損傷する時期を遅らせるだけのものでらシ、とみ
噛み等によるきすが一凹発生するとその部分から徐々に
侵蝕されてリークの原因となシ、短期間のうちにプロセ
ス制御系に外乱を及ぼすようになる。When cavitation occurs, noise and vibration occur, causing damage to the valve body and piping. This cavity/
Generally speaking, note ring 7 and plug 7- are used as countermeasures against gin.
Although Stellite is applied to the top 6, this is only to delay the timing of damage to these parts, and if a scratch occurs due to grinding etc., that part will gradually erode and leak. This causes disturbances to the process control system within a short period of time.
本発明は上記従来構造の欠点をなくすためになサレタも
ので、通過する流体のキャビチー／ヨノ発生を抑制し弁
本体や配管の損傷が防止でさるような高差圧調節弁を提
供することを目的とするものである。The present invention has been made to eliminate the drawbacks of the conventional structure described above, and it is an object of the present invention to provide a high differential pressure regulating valve that suppresses the occurrence of cavities and bulges in the passing fluid and prevents damage to the valve body and piping. This is the purpose.
トの面に複数個の円周方向溝を設けるとともに、ステム
およびパルプボディを延長してこの両者間に複数個の段
落を設け、この段落ｒ（パルプのオリフィス部を通過し
た流体を通して弁入口圧力を徐々に降下させたことを特
徴とするものである。A plurality of circumferential grooves are provided on the surface of the stem, and a plurality of stages are provided between the stem and the pulp body by extending the stem and the pulp body. It is characterized by a gradual descent of
以下本発明の一実施例につき第２図および第３図を参照
して説明する。これらの図ｒ（おいて第１図と同一部分
には同一符号を付して説明を省略する。本発明は第２図
および第３図に示すようにステム４およびパルプボディ
９を下方に長く延長し、ステム４の延長部外を間隔を置
いて包囲する二重円筒形のケージｌｏを設ける。そして
このケージ１０の内筒は多数の孔を有し、ステム４に設
けた７ランン４ａとケージ１０の内外筒間のスペースを
仕切る棚板１０ａとにょｐ流体の通路に複数個の段落（
ス、ケージ）８１．Ｓ２・・・・を形成させる。またパ
ルプのオリフィス部８の入口側には多数の孔を有する円
筒形のケージ１１を設けるとともＶこ、グラグ／−トロ
の接触面には複数個の円周方向溝６ａを設ける。An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In these figures (r), the same parts as in Fig. 1 are given the same reference numerals and explanations are omitted.As shown in Figs. A double cylindrical cage 10 is provided which extends and surrounds the outside of the extended portion of the stem 4 at intervals.The inner cylinder of this cage 10 has a large number of holes, and seven runs 4a provided in the stem 4 and a double cylindrical cage 10 are provided. A plurality of stages (
(S, Cage) 81. S2... is formed. Further, a cylindrical cage 11 having a large number of holes is provided on the inlet side of the pulp orifice portion 8, and a plurality of circumferential grooves 6a are provided on the contact surface of the grag/toro.
このような構造の調節弁において、流体はパルプ接続部
Ａからパルプボディ９に入りケージ１１およびオリフィ
ス部８を通ってケージｌｏ内に流れ込む。ケージ１１で
は流路の面積は比較的大きいのでそれ程大きな圧力降下
は起らない。ケージ１１を出た流体はオリアイス部８で
ある程度圧力降下し、ついでケージ１０とステム４とで
構成される段落ＳＨ。In the control valve having such a structure, fluid enters the pulp body 9 from the pulp connection part A, passes through the cage 11 and the orifice part 8, and flows into the cage lo. Since the area of the flow path in the cage 11 is relatively large, a large pressure drop does not occur. The fluid exiting the cage 11 undergoes a certain pressure drop in the oriice section 8, and then enters the stage SH consisting of the cage 10 and the stem 4.
８２、・・・・で体積の膨張・収縮をくシ返えしながら
徐々に圧力降下するのでキャビテーションの発生を防止
することができる。ざらに弁の開ｄが少ない微少流量時
にはプラグ７−ト６に設０プだ複数個の溝６ａが段落と
なり、体積の膨張・収縮をくう返えして徐々に圧力降下
するので、この部外でのキヤビテーシヨンの発生が防止
できるものである。82, . . . , the pressure is gradually lowered while repeating the expansion and contraction of the volume, thereby making it possible to prevent the occurrence of cavitation. When the flow rate is small and the valve opening d is small, the plurality of grooves 6a provided in the plug 7-to 6 form a row, and the pressure gradually decreases due to repeated expansion and contraction of volume. This can prevent cavitation from occurring outside.
なお下流のケージ１０は孔の面積を次第に太キくシて順
次ω［路面状が大きくなる構造としである。またケージ
１１とステム４とで構成される段落Ｓ 、 、 Ｓ２・
・・・の故は流体の条件により適Ｘ増減させることがで
きる。Note that the downstream cage 10 has a structure in which the hole area is gradually increased so that the road surface shape becomes larger. Also, the paragraphs S, , S2, which are composed of the cage 11 and the stem 4
Because of this, X can be increased or decreased appropriately depending on the fluid conditions.
以上のように本発明によ九は、調節弁のシート部および
この延長上Ｋ ９ｉ数個の段落を設けることによりＡ節
弁内でのキャビチー／ヨ／発生を抑制し、弁本体や配管
の損傷を防止でさるような旨差圧調節弁を提供すること
ができる。As described above, the present invention suppresses the occurrence of cavities in the A section valve by providing several stages on the seat part of the control valve and its extension, and prevents the occurrence of cavities in the valve body and piping. It is possible to provide a differential pressure regulating valve that prevents damage.
第１図は従来の調節弁の構造を示す一部断面正面図、第
２図は本発明の一実施例を示す断面図、第３図は第２図
の部外拡大曲面図である。
４・・ステム、 ５・・プラグ、６・・プラグ
ノート、 ７・・ノートリング、８・・オリフィス部
、 ９・・パルプボディ、ＳＩ、Ｓ２．・・段落、
６ａ 溝。
代理人 弁理士 則 近 愈 佑（はが１名）第１図
第 ２ 囚FIG. 1 is a partially sectional front view showing the structure of a conventional control valve, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 3 is an enlarged external curved view of FIG. 4. Stem, 5. Plug, 6. Plug note, 7. Note ring, 8. Orifice part, 9. Pulp body, SI, S2. ...paragraph,
6a Groove. Agent: Patent Attorney Noriyuki Chika (1 person) Figure 1, Prisoner 2
Claims (1)
るパルプボディ側に設けたシートリングとよ’ｌ０１５
Ｍされるオリフィス部の面積を変えることにより流体の
流量を制御する高差圧調節弁において、前記プラグシー
トの而に複数個の円周方向溝を設けるとともに、前記ス
テムおよびバルブボディｆ：延長してこの両者間ｖ−ｃ
腹数個の段落を設け、この段落に前記オリフィス部全
通過した流体を通して弁入口圧力を徐々に降下させたこ
とを待機と−ｆる高差圧調節弁。The seat ring provided on the pulp body side facing the plug note at the tip of the stem.'l015
In the high differential pressure regulating valve that controls the flow rate of fluid by changing the area of the orifice portion that is subjected to M, a plurality of circumferential grooves are provided in the plug seat, and the stem and the valve body f: extend. between both levers v-c
A high differential pressure regulating valve is provided with several stages, and the valve inlet pressure is gradually lowered by passing the fluid that has completely passed through the orifice through the stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6447483A JPS59190587A (en) | 1983-04-14 | 1983-04-14 | High differential pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6447483A JPS59190587A (en) | 1983-04-14 | 1983-04-14 | High differential pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59190587A true JPS59190587A (en) | 1984-10-29 |
Family
ID=13259257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6447483A Pending JPS59190587A (en) | 1983-04-14 | 1983-04-14 | High differential pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59190587A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6130082A (en) * | 1984-07-20 | 1986-02-12 | Sanyo Electric Co Ltd | Photovoltaic device |
| WO2009066980A3 (en) * | 2007-11-20 | 2009-10-22 | Mimos Berhad | An improved micro check valve |
| CN102313054A (en) * | 2011-08-19 | 2012-01-11 | 浙江盾安阀门有限公司 | Piston type pressure reducing valve |
| WO2020014463A1 (en) * | 2018-07-12 | 2020-01-16 | Fisher Controls International Llc | Monolithic, non-plugging multi-stage valve trim |
-
1983
- 1983-04-14 JP JP6447483A patent/JPS59190587A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6130082A (en) * | 1984-07-20 | 1986-02-12 | Sanyo Electric Co Ltd | Photovoltaic device |
| WO2009066980A3 (en) * | 2007-11-20 | 2009-10-22 | Mimos Berhad | An improved micro check valve |
| CN102313054A (en) * | 2011-08-19 | 2012-01-11 | 浙江盾安阀门有限公司 | Piston type pressure reducing valve |
| WO2020014463A1 (en) * | 2018-07-12 | 2020-01-16 | Fisher Controls International Llc | Monolithic, non-plugging multi-stage valve trim |
| CN110715108A (en) * | 2018-07-12 | 2020-01-21 | 费希尔控制产品国际有限公司 | Integrated non-plugging multi-stage valve trim |
| US10781927B2 (en) | 2018-07-12 | 2020-09-22 | Fisher Controls International Llc | Monolithic, non-plugging multi-stage valve trim |
| CN110715108B (en) * | 2018-07-12 | 2023-12-29 | 费希尔控制产品国际有限公司 | Integrated non-blocking multi-stage valve trim |
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