JP2005155878A - Flow rate adjustment valve - Google Patents

Flow rate adjustment valve Download PDF

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JP2005155878A
JP2005155878A JP2003399302A JP2003399302A JP2005155878A JP 2005155878 A JP2005155878 A JP 2005155878A JP 2003399302 A JP2003399302 A JP 2003399302A JP 2003399302 A JP2003399302 A JP 2003399302A JP 2005155878 A JP2005155878 A JP 2005155878A
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valve
flow rate
portion
stem
valve body
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JP4247386B2 (en )
JP2005155878K1 (en )
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Masaya Kimura
真哉 木村
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Asahi Organic Chem Ind Co Ltd
旭有機材工業株式会社
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PROBLEM TO BE SOLVED: To provide a flow rate adjustment valve capable of finely adjusting a flow rate within a wide flow rate range, stably keeping flow rate adjusting characteristic for a long period and being miniaturized.
SOLUTION: A valve seat face 2 is formed on a bottom face of a valve chest 3 formed at an upper part of a main body 1, a first flow channel 5 communicated with a communication port 4 formed on a center of the valve seat face 2, and a second flow channel 6 communicated with the valve chest 3 are respectively formed, and a diaphragm 10 is formed by integrally mounting a first valve element 11 capable of being inserted into the communication port 4 by the axial forward and backward movement of a stem and dropping and projecting from a liquid contact face, an annular projected second valve element 12 capable of being kept into contact with and separated from the valve seat face 2 and formed on a position radially separated from the first valve element 11, and a thin film part 13 formed continuously from the second valve element 1 in the radial direction.
COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、化学工場、半導体製造分野、食品分野、バイオ分野などの各種産業における流体輸送配管に用いられる流量調節弁に関するものである。 The present invention, chemical plants, semiconductor manufacturing field, food field, it relates to flow control valves used in the fluid transportation pipeline in various industries such as biotechnology.

従来、流量調節弁は種々使用されているが、一般的には図13に示されるようなものが挙げられる。 Conventionally, the flow control valve has been variously used, in general, include the ones represented in Figure 13. このタイプの流量調節弁は、弁室100の底面の連通口周縁部が弁座部101となっており、弁座部101に挿入されるニードル型の弁体102を設け、ハンドル103を回転させることによりハンドル103下部に連結された弁体102を上下動させ、弁座部101との開口面積を変化させることで流量を調節しているものであり、全閉時には弁体102のテーパ部104が弁座部101に当接して流路を塞ぐものであった。 This type of flow control valve is the communicating port peripheral portion the valve seat 101 of the bottom surface of the valve chamber 100 is provided with a valve body 102 of the needle type which is inserted into the valve seat 101 to rotate the handle 103 It is moved up and down the valve element 102 coupled to the lower handle 103 by, which regulates the flow rate by varying the opening area of ​​the valve seat portion 101, the tapered portion 104 of valve body 102 is fully closed there were those block the flow path in contact with the valve seat portion 101.

しかしながら、流路を塞ぐのが弁体102のテーパ部104であるため、該弁の開閉に伴い弁座部101とテーパ部104との接触部が摺接し、長期間使用すると弁座部101とテーパ部104の摺接部分が摩耗によって変形するため、流量調節特性が長期的に安定できなくなるという問題、例えば流量調節を必要とする薬液を混合する工程で従来の流量調節弁を用いた場合、長期間使用すると薬液の混合比が狂い、洗浄度合やエッチング度合にばらつきが生じるため、半導体の生産に大きく影響するなどの問題があった。 However, since occlude the flow path is tapered portion 104 of valve body 102, the contact portion between with valve seat 101 and the tapered portion 104 to the opening and closing of the valve is in sliding contact, the valve seat portion 101 a long period of use since the sliding contact portion of the tapered portion 104 is deformed due to wear, when the flow rate regulation characteristics using a conventional flow rate control valve in the step of mixing a chemical solution that requires long-term problem of stability can not, for example, a flow control, long term with deviation mixing ratio of the chemical liquid, for variations in cleaning degree or etching degree occurs, there is a problem such as a large effect on the production of semiconductors. また、弁座部101と弁体102のテーパ部104の摺接部分からパーティクルが多く発生するので、パーティクルの発生を嫌う用途、例えば半導体製造装置などへの使用が敬遠されるという問題が発生していた。 Further, since the particles from the sliding contact portion of the tapered portion 104 of the valve seat portion 101 and the valve element 102 frequently occurs a problem that applications dislikes generation of particles, for example, use in semiconductor manufacturing equipment is avoided is generated which was.

これらの問題を解決するため図14に示されるような弁座105と弁体106のテーパ部107が接触しない流量調整弁があった(例えば、特許文献1参照)。 Tapered portion 107 of valve seat 105 and the valve body 106 as shown in FIG. 14 for solving these problems there has been a flow control valve which is not in contact (e.g., see Patent Document 1). この流量調整弁は、エア圧により開閉操作が行われ、ダイヤフラム108の中央に弁座105に圧着する弁体106を有し、その弁体106の周囲に一体に形成した環状薄膜部109を有し、その環状薄膜部109の周囲に一体に形成した筒状保持部110を有しており、ダイヤフラム108の中央の弁体106の下面中央部に流体流入通路111に挿入されるテーパピン112が取り付けてある構造であり、流量を調整するテーパピン112は流体流入通路111の開口縁と摺接することがなく、ダイヤフラム108の中央の弁体106のフラットな下面が弁座105に圧着されるので、パーティクルの発生を抑制できるものであった。 The flow rate adjusting valve, the opening and closing operation is performed by the air pressure, it has a valve body 106 for crimping the valve seat 105 in the center of the diaphragm 108, have the annular thin portion 109 formed integrally around the valve body 106 and has a cylindrical holding portion 110 which is formed integrally with the periphery of the annular thin portion 109, the taper pin 112 is mounted to be inserted into the fluid inlet passage 111 in the central portion of the lower surface of the center of the valve body 106 of the diaphragm 108 a and Aru structure, the taper pin 112 to adjust the flow rate without sliding contact with the opening edge of the fluid inlet passage 111, since the flat underside of the center of the valve body 106 of the diaphragm 108 is pressed against the valve seat 105, the particles were those of generation can be suppressed.

また、流量調節弁の微小な開度を調節するためには、図15に示されるようなピッチの異なる第1ねじ部117と第2ねじ部119をそれぞれ設けたステム構造の流量調節弁があった(例えば、特許文献2参照)。 In order to adjust the minute opening of the flow control valve, there is a flow rate regulating valve stem structure provided respectively such pitch different from the first threaded portion 117 of the second threaded portion 119 shown in FIG. 15 and (for example, see Patent Document 2). この流量調節弁は、ニードル部材が調節ねじ113の回動によって直動する直動部材114に取り付けられていて、調節ねじ113はバルブボディ本体115のねじ溝116と螺合する第1ねじ部117と直動部材114の内ねじ部118と螺合する第2ねじ部119を有しており、第2ねじ部119のねじピッチは第1ねじ部117のねじピッチより小さく構成されており、ピッチの差を設けることによって微少な開度の調節を行うことができるものであった。 The flow control valve is attached to the linearly moving member 114 which the needle member is linear by the rotation of the adjustment screw 113, adjusting screw 113 is first threaded portion 117 to be screwed with the screw groove 116 of the valve main body 115 and has a second screw portion 119 screwed with the inner threaded portion 118 of the translation member 114, the thread pitch of the second threaded portion 119 is configured to be smaller than the thread pitch of the first threaded portion 117, the pitch It was achieved by providing a difference in can be regulated in fine opening.
特開平10−153268号公報(第4頁、図1) JP 10-153268 discloses (page 4, FIG. 1) 特開平11−051217号公報(第4頁、図1) JP 11-051217 discloses (page 4, FIG. 1)

しかしながら、前記従来の弁座105と弁体106のテーパ部107が接触しない流量調整弁(前記特許文献1参照)は、流体流入通路111に接触せず開口面積を調整するためのテーパ形状のテーパピン112と、流路を塞ぐため弁座105と圧接する弁体106とを分離して持つことにより、テーパピン112のテーパ部107が弁座105と摺接することはないが、テーパピン112と流体流入通路111とは常に微開状態にあり、弁体106に微小流量を調整する機構を備えていないので、微開領域では流量調整ができないという問題があった。 However, the flow rate adjusting valve the tapered portion 107 does not contact the conventional valve seat 105 and the valve body 106 (the Patent Document 1) is tapered for adjusting the opening area without contacting the fluid entrance 111 taper pins and 112, by having to separate the valve body 106 for pressing the valve seat 105 to close the flow path, although the tapered portion 107 of the taper pin 112 is never brought into sliding contact with the valve seat 105, taper pin 112 and the fluid entrance 111 There is always slightly open state and, therefore does not have a mechanism for adjusting the minute flow rate to the valve body 106, there is a problem that can not flow adjustment in the slightly open area. また、仮に弁座105と弁体106との開度をコントロールして微小流量の調整を行おうとしても、微開領域では、流体がテーパピン112と流体流入通路111とで形成される開口部分を通過して弁座105と弁体106とで形成される空間部分に至るまで、流体の流れを抑制させるものがなく、弁座105の突起と弁体106のフラットな下面とで形成される空間部分で流量調整を行おうとしても、開度に対して急激に流量が増加するため、流体の流れに対して流量調整が追いつかずに調整したい流量より大きい流量になってしまい、微小流量を調整するのは非常に困難であった。 Further, even attempt to adjust the minute flow rate by temporarily controlling the opening degree of the valve seat 105 and the valve body 106, in the slightly open region, an opening portion in which the fluid is formed by the taper pin 112 and the fluid entrance 111 through up to the space portion formed between the valve seat 105 and the valve body 106, there is nothing to suppress the flow of the fluid, the space formed by the flat lower surface of the projection and the valve body 106 of valve seat 105 even attempts to flow adjustment portion, since the sudden flow rate increases relative to the opening, becomes the greater flow rate than the flow rate to be adjusted to keep pace with the flow rate adjusted to the flow of fluid, adjusts the minute flow rate It was very difficult to. さらに、テーパピン112はエア圧によって開閉操作が行われるため、流量の微小な調整が困難であり、特に微開領域での開度のコントロールは非常に困難であるという問題があった。 Furthermore, taper pins 112 for opening and closing the air pressure is carried out, it is difficult to fine adjustment of the flow rate, has a problem that it is very difficult, especially control of the opening degree in the fine open area.

また、前記従来の微小な開度を調節するための流量調節弁(前記特許文献2参照)は、調節ねじ113の第1ねじ部117と第2ねじ部119が上下軸方向に直列に形成されており、微小な開度を調節するための構成は上下方向に長くなってしまうため、流量調節弁の上下方向の寸法が大きくなり、装置などに設置する場合には装置自体が大きくなってしまい、コンパクト化ができなくなるという問題があった。 Furthermore, the conventional small opening flow control valve for adjusting (see Patent Document 2), a first threaded portion 117 and the second threaded portion 119 of the adjustment screw 113 is formed in series in the vertical direction and, the configuration for adjusting the small opening for becomes long in the vertical direction, the vertical dimension of the flow rate control valve is increased, when installed in a device becomes large device itself , there is a problem that compactness can not be.

本発明は、以上のような従来技術の問題点に鑑みてなされたものであり、広い流量範囲で微細な流量調節ができると共に、流量調節特性を長期間安定して維持することができ、且つ、コンパクト化が図れる流量調節弁を提供することを目的とする。 The present invention has been made in view of the above problems of the prior art, it is a fine flow regulation over a wide flow range, it is possible to maintain the flow rate control characteristics stably for a long period of time, and , and to provide a flow control valve which compactness can be achieved.

本発明の構成は、図1〜図3を参照しつつ説明すると、上部に設けられた弁室3の底面に弁座面2が形成され、弁座面2の中心に設けられた連通口4に連通する第一流路5と弁室3に連通する第二流路6を有する本体1と、ステムの軸方向の進退移動により連通口4に挿入可能で接液面の中心から垂下突設された第一弁体11と、弁座面2に接離可能にされ第一弁体11から径方向へ隔離した位置に形成された円環状凸条の第二弁体12と、第二弁体12から径方向へ連続して形成された薄膜部13とが一体的に設けられた隔膜10を具備したことを第1の特徴とする。 Configuration of the present invention, will be described with reference to FIGS. 1 to 3, the valve seat surface 2 to the bottom surface of the valve chamber 3 provided in the upper portion is formed, the communication port 4 provided at the center of the valve seat surface 2 the main body 1 having a second passage 6 communicating with the first channels 5 and the valve chamber 3 communicating, are suspended projects from insertable center of the wetted surface to the communication port 4 by advancing and retracting movement in the axial direction of the stem the the first valve body 11, and the second valve body 12 of the annular convex formed at a position separated from the first valve body 11 is in separably on the valve seat surface 2 in the radial direction, the second valve body has and the thin film portion 13 which is formed continuously in the radial direction from 12 a first characterized by including a diaphragm 10 which is integrally provided.

また、上部にハンドル32が固着され下部内周面に雌ネジ部28と外周面に雌ネジ部28のピッチより大きいピッチを有する雄ネジ部29を有する第一ステム27と、内周面に第一ステム27の雄ネジ部29と螺合する雌ネジ部36を有する第一ステム支持体34と、上部外周面に第一ステム27の雌ネジ部28に螺合される雄ネジ部20を有し下端部に隔膜10が接続される第二ステム19と、第一ステム支持体34の下方に位置し第二ステム19を上下移動自在かつ回動不能に支承する隔膜押さえ21と、第一ステム支持体34と隔膜押さえ21を固定するボンネット38とを具備することを第2の特徴とする。 Further, the first stem 27 having a male threaded portion 29 having a larger pitch than the pitch of the female thread portion 28 on the lower inner peripheral surface the handle 32 is fixed to the upper to the female thread portion 28 and the outer peripheral surface, the first on the inner peripheral surface Yes a first stem support 34 having a female screw portion 36 to be screwed with the male screw portion 29 one stem 27, the male screw portion 20 screwed into the female screw portion 28 of the first stem 27 to the upper outer peripheral surface and a second stem 19 and the septum 10 is connected to the lower end, and the diaphragm holder 21 for supporting the second stem 19 so as not to vertically movable and rotates located below the first stem support 34, first stem by comprising a hood 38 for fixing the support 34 and the diaphragm holder 21 and the second feature.

また、第一ステム27の外周面に設けられた雄ネジ部29と下部内周面に設けられた雌ネジ部28のピッチの差が、雄ネジ部29のピッチの20分の1から5分の1であることを第3の特徴とする。 The difference between the pitch of the female screw portion 28 provided on the lower inner peripheral surface and the male screw portion 29 provided on the outer peripheral surface of the first stem 27, 5 minutes 1-20 minutes of the pitch of the male thread portion 29 the third being a one.

さらに、隔膜10がポリテトラフルオロエチレン(以下、PTFEと称する)からなることを第4の特徴とする。 Furthermore, the diaphragm 10 is polytetrafluoroethylene and fourth characteristic in that it consists of (hereinafter referred to as PTFE).

本発明は以上のような構造をしており、これを使用することにより以下の優れた効果が得られる。 The present invention is of a structure as described above, the following excellent effects by using this obtained.
1. 1. 流量調節弁の開度に応じて二つの流量調節部が切り替わって流量調節を行うため、幅広い流量範囲で流量調節を行うことができる。 To perform a flow control switched are two flow rate regulator in accordance with the opening degree of the flow regulating valve, it is possible to perform flow rate control over a wide flow rate range.
2. 2. 流量調節弁の微小な開度を容易にかつ精密に調節できるため、幅広い流量範囲で流量の微調整を短時間で行うことができる。 Since the small opening of the flow regulating valve can be easily and precisely adjusted, it can be performed in a short time fine adjustment of the flow rate over a wide flow rate range.
3. 3. 弁体や弁座面が摺接しないため、流量調節特性を長期間安定して維持させることができ、パーティクルの発生を抑制することができる。 Since the valve body and the valve seat surface is not in sliding contact, it is possible to maintain the flow rate control characteristics stably for a long period of time, it is possible to suppress the generation of particles.
4. 4. 流量の微調整を行うステムが小さく収まる構造であるため、流量調節弁をコンパクトに形成することができる。 Since stem performing fine adjustment of the flow rate has a structure that fits small, it is possible to form the flow control valve in compact.

以下、本発明の実施例について図面を参照して説明するが、本発明が本実施例に限定されないことは言うまでもない。 Will now be described with reference to the accompanying drawings embodiments of the present invention, it goes without saying that the invention is not limited to this embodiment. 図1は本発明の実施例を示す流量調節弁の全開状態を示す縦断面図、図2は図1の分解斜視図、図3は図1の要部拡大縦断面図である。 1 is a longitudinal sectional view showing a full open state of the flow rate control valve showing an embodiment of the present invention, FIG 2 is an exploded perspective view of FIG. 1, FIG. 3 is an enlarged longitudinal sectional view of FIG. 図4は図1の全閉状態を示す縦断面図、図5は図4の要部拡大縦断面図である。 Figure 4 is a longitudinal sectional view showing a fully closed state of FIG. 1, FIG. 5 is an enlarged longitudinal sectional view of FIG. 図6は図1の半開状態を示す縦断面図、図7は図6の要部拡大縦断面図である。 Figure 6 is a longitudinal sectional view showing a half-open state of FIG. 1, FIG. 7 is an enlarged longitudinal sectional view of FIG. 図8は隔膜が第一弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Figure 8 is an enlarged longitudinal sectional view of a diaphragm flow control valve composed of only the first valve body. 図9は隔膜が形状を円柱とした第一弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Figure 9 is an enlarged longitudinal sectional diagram of a flow regulating valve by only the first valve body diaphragm has a shape as cylindrical. 図10は隔膜が第二弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Figure 10 is an enlarged longitudinal sectional view of a diaphragm flow control valve composed of only the second valve body. 図11は流量Qの測定を行うための試験装置を示す概念構成図である。 Figure 11 is a conceptual diagram showing a testing apparatus for measuring the flow rate Q. 図12は流量調節弁のリフト量Lと流量Qの関係を示したグラフである。 Figure 12 is a graph showing the relationship between the lift amount L and the flow rate Q of the flow rate control valve.

図1〜図3において、1はPTFE製の本体である。 1 to 3, 1 is a main body made of PTFE. 本体1の上部に後記隔膜10とで形成される略すり鉢形状の弁室3を有しており、弁室3の底面には後記第二弁体12の圧接によって流路の全閉シールを行う弁座面2が形成され、弁座面2の中心に設けられた連通口4に連通する第一流路5と弁室3に連通する第二流路6を有している。 Has a valve chamber 3 of substantially mortar shape formed in a later explained diaphragm 10 to the upper portion of the main body 1, the all-closed seal of the flow path by pressure of the later explained second valve body 12 to the bottom surface of the valve chamber 3 It is formed a valve seat surface 2, and a second passage 6 communicating with the first channels 5 and the valve chamber 3 communicating with the communication port 4 provided at the center of the valve seat surface 2. 弁室3の上方には後記隔膜押さえ21の嵌合部23を受容する凹部8が設けられていて、その底面には後記隔膜10の環状係止部14が嵌合する環状凹部7が設けられている。 A recess 8 for receiving the fitting portion 23 of the later explained diaphragm presser 21 provided above the valve chamber 3, an annular recess 7 which annular locking portion 14 of the later explained diaphragm 10 is fitted is provided on its bottom surface ing. また本体1の上部外周面には、後記ボンネット38が螺着される雄ネジ部9が設けられている。 Also on the upper outer peripheral surface of the main body 1, a male screw portion 9 below the hood 38 is screwed is provided. なお、本体1の材質にはPTFEを用いているが、流体の特性に応じて他のフッ素樹脂、PP、ポリ塩化ビニル、ポリビニリデンフルオライド、その他のプラスチック或いは金属でも良い。 Although the material of the body 1 is used PTFE, other fluorine resin in accordance with the characteristics of the fluid, PP, polyvinyl chloride, polyvinylidene fluoride, or other plastic or metal.

10はPTFE製の隔膜であり、隔膜10の下部に接液面の中心から垂下突設された第一弁体11と、第一弁体11から径方向へ隔離した位置に形成された先端が断面円弧状の円環状凸条の第二弁体12と、第二弁体12から径方向へ連続して形成された薄膜部13と、薄膜部13の外周に断面矩形状の環状係止部14と、隔膜10の上部に後記第二ステム19の下端部に接続される接続部16が一体的に設けられている。 10 is a PTFE septa, the first valve element 11 which is suspended projecting from the center of the wetted surface in the lower portion of the diaphragm 10, the tip which is formed at a position separated from the first valve body 11 in the radial direction a second valve body 12 of the arcuate section of the annular convex, the thin film portion 13 formed continuously from the second valve body 12 in the radial direction, a rectangular cross section of the annular locking portion on the outer periphery of the thin film portion 13 14, connecting portion 16 connected to the upper portion of the diaphragm 10 to the lower end of the later explained second stem 19 is integrally provided. 第一弁体11は、下方に向かって直線部17とテーパ部18とが連続して設けられており、第一弁体11と第二弁体12の間には環状溝部15が形成されている。 The first valve body 11 is downwardly provided continuously and the linear portion 17 and the tapered portion 18, the first valve body 11 between the second valve body 12 is formed an annular groove 15 there. 第一弁体11の直線部17の外径D1は、連通口4の内径Dに対して0.97Dで設定され、第一弁体11のテーパ部18のテーパ角度は軸線に対して15°で設定され、第二弁体12の円環状凸条の径D2は、連通口4の内径Dに対して1.5Dで設定されている。 The outer diameter D1 of the straight portion 17 of the first valve body 11 is set at 0.97D relative to the inner diameter D of the communication port 4, the taper angle of the tapered portion 18 of the first valve body 11 is 15 ° relative to the axis in set, an annular convex diameter D2 of the second valve body 12 is set at 1.5D relative to the inner diameter D of the communication port 4. 隔膜10は、環状係止部14を本体1の環状凹部7に嵌合された状態で本体1と後記隔膜押さえ21とで挟持固定される。 Diaphragm 10 is clamped fixed in the main body 1 and the later explained diaphragm presser 21 an annular locking portion 14 in a state of being fitted into the annular recess 7 of the body 1.

流量調節弁が全閉時には第二弁体12と弁座面2とが圧接されて全閉シールを行い、開度を大きくすると隔膜10は上昇し、第一弁体11及び第二弁体12は隔膜10の上昇に伴って全開まで上昇する。 The flow control valve is fully closed performs a fully closed seal is pressed against the valve seat surface 2 the second valve body 12, increasing the opening diaphragm 10 is raised, the first valve body 11 and the second valve body 12 rises to a fully open with the rise of the diaphragm 10. 全開時においても第一弁体11が連通口4から抜けることはないので全閉から全開まで流量調節が行われる。 Since the first valve body 11 does not come off from the communication port 4 even when the full open flow rate adjustment to the fully open from the fully closed is performed.

本実施例の第一弁体11の直線部17の外径D1は、連通口4の内径Dに対して0.97Dで設定されているが、直線部17の外径D1は連通口4の内径Dに対して0.95D≦D1≦0.995Dの範囲内であることが望ましい。 The outer diameter D1 of the straight portion 17 of the first valve body 11 of the present embodiment has been set at 0.97D relative to the inner diameter D of the communication port 4, the outer diameter D1 of the straight portion 17 of the communication port 4 it is preferably in the range of 0.95D ≦ D1 ≦ 0.995D relative inner diameter D. 第一弁体11と連通口4とを摺接させないためにD1≦0.995Dが良く、流量調節をスムースに行うために0.95D≦D1が良い。 Good D1 ≦ 0.995D in order not to sliding contact with the first valve body 11 and the communication port 4, it is 0.95D ≦ D1 in order to perform a flow control smoothly.

また、第一弁体11のテーパ部18のテーパ角度は軸線に対して15°で設定されているが、12°〜28°の範囲内であることが望ましい。 Although the taper angle of the tapered portion 18 of the first valve body 11 is set at 15 ° to the axis, it is preferably in the range of 12 ° ~ 28 °. 弁を大きくさせずに広い流量範囲を調節ずるために12°以上が良く、開度に対して流量を急激に変化させないために28°以下が良い。 A wide flow range without increasing the valve to adjust cunning often 12 ° or more, 28 ° is good or less in order not rapidly changed the flow against opening. また、テーパ部18の形状は、第一弁体11と連通口4とで形成される第一流量調節部41の開口面積S1が開度に比例して増加するように設定されてる。 The shape of the tapered portion 18 is set so that the opening area S1 of the first flow rate regulator 41, which is formed by the first valve body 11 and the communication port 4 is increased in proportion to the opening. このため、流量調節弁の開度を大きくするにつれて流量は線形に比例して増加するように調節することができる。 Therefore, the flow rate as the degree of opening of the flow control valve to increase can be adjusted to increase in proportion to the linear.
また、第二弁体12の円環状凸条の径D2は、連通口4の内径Dに対して1.5Dで設定されているが、第二弁体12の円環状凸条の径D2は、連通口4の内径Dに対して1.1D≦D2≦2Dの範囲内であることが望ましい。 The diameter D2 of the annular convex second valve body 12 has been set at 1.5D relative to the inner diameter D of the communication port 4, the diameter D2 of the annular convex second valve body 12 , it is preferably in the range of 1.1D ≦ D2 ≦ 2D against the inner diameter D of the communication port 4. 第一弁体11と第二弁体12の間には環状溝部15を確実に設け環状溝部15に流体の流れを抑制させる空間部分を得るためには1.1D≦D2が良く、開度に対して第二弁体12と弁座面2とで形成される開口面積の増加率を抑えるためにD2≦2Dが良い。 Between the first valve body 11 and the second valve body 12 in order to obtain the spatial portion to suppress the flow of fluid to the annular groove 15 provided to ensure the annular groove 15 may have 1.1D ≦ D2, the opening D2 ≦ 2D is good to reduce the rate of increase of the opening area formed by the second valve body 12 and the valve seat surface 2 against.

また、環状溝部15の空間部で流体の流れを抑制させるために、全閉時に環状溝部15と弁座面とで形成される空間部分の体積が、全閉時に第一弁体11の直線部17と連通口4とで形成される空間部分の体積の2倍以上に設定される。 Further, in order to suppress the flow of the fluid in the space of the annular groove 15, the volume of the space portion formed between the fully closed to the annular groove 15 and the valve seat surface, the fully closed linear portion of the first valve body 11 It is set to be more than twice the volume of the space portion formed between the 17 and the communication port 4.

なお、隔膜10の材質はPTFEであるが、切削加工における加工の容易性と寸法安定性が良く、流体が腐食性流体であった場合には腐食の心配なく使用することができるためPTFEが特に好適に使用される。 Although the material of the diaphragm 10 is PTFE, good ease and dimensional stability of the processing in cutting, fluid is PTFE because if was corrosive fluids can be used without fear of corrosion, especially It is preferably used. PTFE以外でも他のフッ素樹脂であれば耐薬品性を得ることができ、耐薬品性の要求がそれほど厳しくない場合はゴムや金属等を使用しても良い。 If another fluororesin other than PTFE can be obtained chemical resistance, may if chemical resistance of less demanding be used rubber, metal or the like.

19はポリプロピレン(以下、PPと称する)製の第二ステムである。 19 polypropylene (hereinafter, referred to as PP) is made of a second stem. 第二ステム19の上部外周面には後記第一ステム27の雌ネジ部28に螺合される雄ネジ部20が設けられ、下部外周は六角形状に形成され、下端部には隔膜10の接続部16が螺着により接続されている。 The upper outer peripheral surface of the second stem 19 male thread portion 20 is provided to be screwed into the female screw portion 28 of the later explained first stem 27, the lower periphery is formed in a hexagonal shape, the connection to the lower end the diaphragm 10 part 16 is connected by screwing. なお、本実施例では隔膜10の接続部16が第二ステム19の下端部に螺着されているが、嵌着などによる接続でもよく、接続方法は特に限定されない。 Although the connection portions 16 of the diaphragm 10 in this embodiment is screwed to the lower end of the second stem 19 may be connected such as by fitted and the connection method is not particularly limited. また、第二ステム19の下部は六角形状であるが、第二ステム19が後記隔膜押さえ21に上下移動自在かつ回動不能に支承されるのであれば形状は特に限定されない。 The lower of the second stem 19 is a hexagonal shape, the second stem 19 is as long as being vertically movably and unrotatably supported on later explained diaphragm presser 21 shape is not particularly limited.

21はPP製の隔膜押さえである。 21 is a diaphragm holder made of PP. 隔膜押さえ21の上部には外周が六角形状の挿入部22が、下部には外周が六角形状の嵌合部23がそれぞれ設けられており、中央部外周には鍔部24が設けられている。 Inserting portion 22 outer periphery of the hexagonal shape on the top of the diaphragm holder 21, the outer periphery in the lower part is provided hexagonal fitting portion 23, respectively, the flange portion 24 is provided at the center portion periphery. 隔膜押さえ21の内周には六角形状の貫通孔25が設けられ、下端面から貫通孔25に向かって縮径するテーパ部26が設けられている。 The inner periphery of the diaphragm holder 21 hexagonal through hole 25 is provided, the tapered portion 26 reduced in diameter toward the through hole 25 from the lower end surface is provided. 挿入部22は後記第一ステム支持体34の中空部36に回動不能に嵌合され、嵌合部23は本体1の凹部8に回動不能に嵌合される。 Insertion portion 22 is fitted so as not to rotate in the hollow portion 36 of the later explained first stem support 34, the fitting portion 23 is fitted so as not to rotate in the recess 8 of the body 1. 貫通孔25には第二ステム19を挿通させ、第二ステム19を上下移動自在かつ回動不能に支承している。 The through-hole 25 is inserted a second stem 19, and supporting the second stem 19 so as not to vertically movable and rotate. なお、隔膜押さえ21の挿入部22、嵌合部23は六角形状であるが、隔膜押さえ21が後記第一ステム支持体34の中空部36及び本体1の凹部8にそれぞれ回動不能に嵌合されるのであれば四角形状や八角形状などでもよく、形状は特に限定されない。 Incidentally, the insertion portion 22 of the diaphragm holder 21, but the fitting portion 23 is hexagonal, each unrotatably fitted in the hollow portion 36 and the recess 8 of the body 1 of the diaphragm holder 21 is later explained first stem support 34 if being may be like a square-shaped or octagonal shape is not particularly limited. 同様に、貫通孔25も六角形状であるが、第二ステム19を上下移動自在かつ回動不能に支承するのであれば形状は特に限定されない。 Similarly, although the through-hole 25 is also hexagonal, shape is not particularly limited as long as supporting a second stem 19 so as not to vertically movable and rotate.

27はPP製の第一ステムである。 27 is a first stem made of PP. 第一ステム27の下部内周面には第二ステム19の雄ネジ部20が螺合するピッチが1.25mmの雌ネジ部28と、外周面にはピッチが1.5mmの雄ネジ部29が設けられており、雄ネジ部29と雌ネジ部28のピッチ差は0.25mmであり、雄ネジ部29のピッチの6分の1になるように形成されている。 First stem in the lower inner peripheral surface 27 and the female screw portion 28 male thread portion 20 is screwed to a pitch of 1.25mm of the second stem 19, the male screw portion 29 the pitch is 1.5mm on the outer peripheral surface is provided with a pitch difference between the male screw portion 29 and the female screw portion 28 is 0.25 mm, and is formed so as to one-sixth of the pitch of the male threaded portion 29. 第一ステム27の下部外周には径方向に突出して設けられたストッパー部30が設けられ、上部には後記把持部33を有するハンドル32が固着されている。 Stopper 30 which protrudes radially in the lower periphery is provided in the first stem 27, a handle 32 having a below grasping portion 33 is fixed to the upper portion. 第一ステム27の外周面に設けられた雄ネジ部29と下部内周面に設けられた雌ネジ部28のピッチ差は、雄ネジ部29のピッチの6分の1になるように形成されているが、ピッチ差は20分の1から5分の1の範囲に設けるのが望ましい。 Pitch difference of the female screw portion 28 provided on the lower inner peripheral surface and the male screw portion 29 provided on the outer peripheral surface of the first stem 27 is formed to be one-sixth of the pitch of the male thread portion 29 and that although the pitch difference desirably provided in the range of 1 1-20 minutes 5 minutes. 弁体は全閉から全開までに一定範囲のリフト量を得るので、ハンドル32のストロークが大きくなり過ぎて弁高が大きくならないようするためにピッチ差を20分の1より大きくすることが好ましい。 Since the valve body is obtained the lift amount of fixed range in the fully open from the fully closed, it is preferable to increase the pitch difference from 1 of 20 minutes to a valve height stroke of the handle 32 becomes too large to that does not increase. 弁を細かいオーダーで精度の良い調節を行うためにピッチ差を5分の1より小さくすることが好ましい。 It is preferably smaller than one fifth the pitch difference to do a good regulation accuracy of the valve with a fine order.
なお、本実施例ではストッパー部30は全閉しても隔膜押さえ21の挿入部22の上端面に接触することはないが、全閉時に隔膜押さえ21の挿入部22の上端面に接触することで回動を停止させ、弁座面2や第二弁体12に過剰な負荷がかかるのを防ぐ構造にしても良い。 Incidentally, the stopper portion 30 in this embodiment is never in contact with the upper end surface of the insertion portion 22 of the diaphragm holder 21 fully closed, the fully closed contacts the upper end surface of the insertion portion 22 of the diaphragm holder 21 in the rotation is stopped, it may be an excessive load is prevented according to the structure on the valve seat surface 2 and the second valve body 12.

34はPP製の第一ステム支持体である。 34 is a first stem support made of PP. 第一ステム支持体34の上部内周面には第一ステム27の雄ネジ部29に螺合される雌ネジ部35が設けられており、下部内周には後記隔膜押さえ21の挿入部22を回動不能に嵌合する六角形状の中空部36が設けられており、下部外周には後記ボンネット38によって固定される鍔部37が設けられている。 The upper inner peripheral surface of the first stem support 34 has a female screw portion 35 screwed is provided on the male screw portion 29 of the first stem 27, the insertion portion 22 of the later explained diaphragm holder 21 in the inner periphery of the lower portion the are hexagonal hollow portion 36 which fits in a rotationally fixed manner is provided, the flange portion 37 to be fixed by the below hood 38 is provided on the lower periphery.
なお、第一ステム支持体34の中空部36は六角形状であるが、隔膜押さえ21の挿入部22が第一ステム支持体34の中空部36に回動不能に嵌合されるのであれば四角形状や八角形状などでもよく、形状は特に限定されない。 Although the hollow portion 36 of the first stem support 34 is hexagonal, if the insertion portion 22 of the diaphragm holder 21 are fitted so as not to rotate in the hollow portion 36 of the first stem support 34 square shape or octagonal shape may be like, the shape is not particularly limited.

38はPP製のボンネットである。 38 is a hood made of PP. ボンネット38の上部には第一ステム支持体34の鍔部37の外径より小さい内径を有する係止部39が設けられ、下部内周面には本体1の雄ネジ部9に螺着される雌ネジ部40が設けられている。 At the top of the bonnet 38 engaging portion 39 is provided with a small inner diameter than the outer diameter of the flange portion 37 of the first stem support 34, it is screwed to the male screw portion 9 of the body 1 in the lower inner peripheral surface female screw portion 40 is provided. ボンネット38は、第一ステム支持体34の鍔部37と隔膜押さえ21の鍔部24を、係止部39と本体1の間で挟持した状態で本体1に螺着していることで各部品を固定することができる。 Hood 38, each part by being screwed to the body 1 in a state where the flange portion 37 and the flange portion 24 of the diaphragm holder 21 of the first stem support 34, is sandwiched between the engaging portion 39 and the main body 1 it can be fixed.

なお、雌ネジ部40は本体1に螺着によって接続されているが、バイヨネット方式やボルトによる接続でもよく、第一ステム支持体34と隔膜押さえ21を本体1に挟持固定できれば特に限定されない。 Incidentally, the female screw portion 40 are connected by screwed to the main body 1, may be connected by bayonet type or bolts, the first stem support 34 and diaphragm holder 21 is not particularly limited as long sandwiched and fixed to the main body 1.

本実施例の本体1と隔膜10を除く第一ステム27等の各部材の材質は、PPを用いているが、ポリ塩化ビニル、ポリビニリデンフルオライド、フッ素樹脂、その他のプラスチック或いは金属でも良い。 Material of each member, such as a first stem 27 except the main body 1 and the membrane 10 of the present embodiment uses the PP, polyvinyl chloride, polyvinylidene fluoride, fluorine resin, or other plastic or metal.

次に本実施例の流量調節弁の作用について図1と図3〜図7に基づいて説明する。 Next the operation of the flow control valve of this embodiment will be described with reference to FIGS. 1 and 3-7.

まず、本実施例の流量調節弁が全閉状態(図4、図5の状態)において、第一流路から流入してきた流体は、弁座面2に圧接された第二弁体12によって閉止される。 First, the flow control valve of this embodiment is fully closed (FIG. 4, the state of FIG. 5), the fluid flowing in from the first flow path is closed by the second valve body 12 is pressed against the valve seat surface 2 that.

ハンドル32を弁が開放する方向に回動させると、ハンドル32の回動に伴なって第一ステム27が外周面の雄ネジ部29のピッチ分だけ上昇し、逆に第一ステム27の内周面の雌ネジ部28に螺合された第二ステム19は第一ステム27の雌ネジ部28のピッチ分だけ下降する。 When the handle 32 valve rotates in a direction to open, first stem 27 is raised by the pitch of the male thread portion 29 of the outer peripheral surface is accompanied with the rotation of the handle 32, of the first stem 27 in the opposite second stem 19 screwed into the female screw portion 28 of the peripheral surface is lowered by the pitch of the female screw portion 28 of the first stem 27. ただし、第二ステム19は回動不能の状態で隔膜押さえ21の貫通孔25に収容されており上下方向のみに移動可能であるため、第二ステム19は本体1に対して第一ステム27外周面の雄ネジ部29と内周面の雌ネジ部28のピッチ差分、本実施例では第一ステム27の雄ネジ部29のピッチが1.5mm、第一ステム27の雌ネジ部28のピッチが1.25mmにしているので、第一ステム27に連動したハンドル32を1回転させることによって第二ステム19は0.25mm(雄ネジ部29のピッチの6分の1)上昇する。 However, since the second stem 19 is movable only in the vertical direction is housed in the through hole 25 of the diaphragm holder 21 in a state of non-rotatable, the second stem 19 is first stem 27 periphery to the main body 1 pitch difference of the surface of the male screw portion 29 and the inner peripheral surface of the female threaded portion 28, in this embodiment the pitch is 1.5mm of the male thread portion 29 of the first stem 27, the pitch of the female thread portion 28 of the first stem 27 There since the 1.25 mm, the second stem 19 by one rotation of the handle 32 in conjunction with the first stem 27 is elevated (one-sixth of the pitch of the male thread portion 29) 0.25 mm. これに伴って、第二ステム19と接続された隔膜10が上昇することで最初に本体1の弁座面2に圧接されていた第二弁体12が弁座面2から離間し、第一弁体11は隔膜の上昇に伴なって上昇し、流量調節弁が半開状態となる(図6、図7の状態)。 Accordingly, the first to the second valve body 12 is separated from the valve seat surface 2 which has been pressed against the valve seat surface 2 of the body 1 by a diaphragm 10 which is connected to the second stem 19 is raised, the first the valve body 11 rises becomes accompanied the rise of the diaphragm, the flow control valve is half open (FIG. 6, the state of FIG. 7). 流体は第一流路5から弁室3へと流れ込み、第二流路6を通過して排出される。 Fluid flows into the valve chamber 3 from the first passage 5, and is discharged through the second flow path 6.

次に上記流量調節弁が半開状態(図6、図7の状態)から、さらにハンドル32を開方向に回動させると第一ステム27の下部外周のストッパー部30が第一ステム支持体34の天井面43に圧接して回動は停止される。 Then the flow control valve is half open (FIG. 6, the state of FIG. 7), when the further rotating the handle 32 in the opening direction stopper portion 30 of the lower periphery of the first stem 27 of the first stem support 34 rotating in pressure contact with the ceiling surface 43 is stopped. ハンドル32、第一ステム27および第二ステム19の回動と連動して隔膜10が上昇し、第一弁体11と第二弁体12は隔膜10の上昇に伴なって上昇し、弁は全開状態となる(図1、図3の状態)。 Handle 32, in conjunction with the rotation of the first stem 27 and second stem 19 diaphragm 10 rises, the first valve body 11 and the second valve body 12 rises becomes accompanied the rise of the diaphragm 10, the valve fully opened state (the state of FIG. 1, FIG. 3).

上記作用において、流量調節弁が全閉から全開に至るまで、開度によって第一弁体11と連通口4とで形成される第一流量調節部41の開口面積S1と、第二弁体12と弁座面2とで形成される第二流量調節部42の開口面積S2は変化するが、S1とS2の大小関係によって流量を調節する作用がそれぞれ異なる。 In the working, until the flow rate control valve reaches the full open from the fully closed, and the opening area S1 of the first flow rate regulator 41, which is formed by the first valve body 11 and the communication port 4 by opening the second valve body 12 the opening area S2 of the second flow rate regulator 42 which is formed in the valve seat surface 2 to vary, different each act to regulate the flow rate by the magnitude relation between S1 and S2. 以下に流量調節弁の開度の全閉から全開に至るまでのS1とS2の関係と流量の調節の仕組みを図3、図5、図7に基づいて説明する。 The S1 and S2 related to the flow mechanism of regulation of up to fully opened from the fully closed opening degree of the flow regulating valve in the following FIG. 3, FIG. 5 will be described with reference to FIG.

S1>S2の場合、流量調節弁の開度は全閉から微開の時であり、流量は第二流量調節部42によって、つまりS2の大小によって調節される。 For S1> S2, the opening degree of the flow rate control valve is when the fully closed slightly open, the flow rate is adjusted by the second flow rate regulator 42, i.e. the magnitude of the S2. S1>S2の範囲内では、第一流量調節部41は、第一弁体11の直線部17と連通口4で流量を一定に調節することができ、流体は第一流量調節部41によって流量を一定にされた後、第二流量調節部42に至る前にまず環状溝部15により形成される空間部分に流れ込む。 Within the S1> S2, the first flow rate adjusting unit 41, it is possible to adjust the flow rate at the straight portion 17 and the communication port 4 of the first valve body 11 constant, the fluid flow rate by the first flow rate regulator 41 after being a constant, flows into the space portion is first formed by an annular groove 15 before reaching the second flow rate regulator 42. 流体は環状溝部15の底面に当たり、径方向へ広がって第二弁体12の内周面に当たり、さらに流れの向きを変えて第二流量調節部42に至るため、空間部分で流体の流れが一旦停滞される。 Fluid hits the bottom of the annular groove 15, strikes the inner circumferential surface of the second valve body 12 extends in the radial direction and since it reaches the second flow rate regulator 42 by changing the direction of flow, once the flow of fluid in the space portion It is stagnation. そのため流体は、空間部分で流れが抑制されて急激な流量の増加を抑えることができ、第二流量調節部42で十分制御可能な流れで第二流量調節部42に至り、第二流量調節部42で精度良く流量が調節されるため、流量調節弁が微開時の微小流量の調節が可能となる。 Therefore fluid, it is possible to suppress an increase of rapid flow is suppressed flows through a space portion reaches the second flow rate regulator 42 with sufficient controllable flow in a second flow rate regulator 42, the second flow rate regulator 42 for accurately flow rate is adjusted by the flow rate regulating valve is adjustable for fine flow rate during slightly open. このとき、第二弁体12の円環状凸条の径D2は、連通口4の内径Dに対して1.1D≦D2≦2Dの範囲内で設けられているため、流量の増加を抑制するのに効果的な環状溝部15を第一弁体11と第二弁体12の間に形成することができ、環状溝部15により形成される空間部分で第一流量調節部41からの流体の流れを抑制することができる。 In this case, the diameter D2 of the annular convex second valve body 12, because it is provided within the scope of 1.1D ≦ D2 ≦ 2D against the inner diameter D of the communication port 4, to suppress an increase in flow rate effective the annular groove 15 can be formed between the first valve body 11 and the second valve body 12, the flow of fluid from the first flow rate regulator 41 in the space part formed by an annular groove 15 for it is possible to suppress.

S1=S2の場合、第一流量調節部41の開口面積S1と第二流量調節部42の開口面積S2が同一となり、この時点を境に流量を調節する部分が第二流量調節部42から第一流量調節部41へと切り替わる。 For S1 = S2, the opening area S1 and the opening area S2 of the second flow rate regulator 42 of the first flow rate regulator 41 is the same, the portion to adjust the flow rate as a boundary the point a from the second flow rate regulator 42 switches to leading amount controller 41. つまりS1の大小によって流量は調節される。 That flow rate depending on the magnitude of S1 is adjusted.

S1<S2の場合、流量調節弁の開度は微開から大きくして全開に至るまでであり、第二流量調節部42では細かい流量調節が困難となり、第一流量調節部41によって、つまりS1の大小によって調節される。 For S1 <S2, the opening degree of the flow regulating valve is up to reach the fully open by increasing the slightly open, the second flow rate regulator 42 fine flow regulation is difficult, by the first flow rate regulator 41, that is S1 It is regulated by large and small. S1<S2の範囲内では、第一流量調節部41は第一弁体11のテーパ部18と連通口4で流量を調節しており、第一弁体11のテーパ部18は、流量調節弁の開度に対して開口面積S1が比例して増加するように設定されているため、流量調節弁の開度を大きくするにつれて流量は線形に比例して増加するように調節することができる。 S1 <Within S2, the first flow rate regulator 41 and adjusts the flow rate at the tapered portion 18 and the communication port 4 of the first valve body 11, the tapered portion 18 of the first valve body 11, the flow regulating valve since the opening area S1 against the opening is set to increase in proportion, the flow rate as the degree of opening of the flow control valve to increase can be adjusted to increase in proportion to the linear.

なお、S1>S2からS1=S2までの第一流量調節部41の開口面積S1は、第一弁体11の直線部17の外径D1と連通口4の内径Dによって設定されており、直線部17の外径D1が連通口4の内径Dに対して0.95D≦D1≦0.995Dの範囲内に設定されていれば、微開領域のみをS2の大小によって調節させ、あとはS1の大小によって流量は線形に比例して増加するように調節することができ、かつ第一弁体11と連通口4とを摺接させることがない。 The opening area S1 of the first flow rate regulator 41 from S1> S2 to S1 = S2 is set by the internal diameter D of the outer diameter D1 and the communication port 4 of the straight portion 17 of the first valve body 11, a straight line if the outer diameter D1 of the part 17 that are configured in a range of 0.95D ≦ D1 ≦ 0.995D against the inner diameter D of the communication port 4, only slightly open area is regulated by the magnitude of the S2, after S1 is the flow rate through the large and small it can be adjusted to increase in proportion to the linear and never sliding contact with the first valve body 11 and the communication port 4.

以上のことから、本発明の流量調節弁は、開度が微小なときには第二流量調節部42によって流量調節を行い、開度を大きくすると第二流量調節部42から第一流量調節部41に切り替わって流量調節を行うので、全閉から全開に至るまで開度に対して流量が良好な比例関係を得ることができ、微小な流量から大きな流量まで確実な流量の調節が可能となり、幅広い流量範囲で流量調節を行うことができる。 From the above, the flow control valve of the present invention, when the opening is small performs a flow control by the second flow rate regulator 42, from the second flow rate regulator 42 by increasing the degree of opening the first flow rate regulator 41 since the flow rate regulation is switched, the total flow with respect to opening from the closed up to the fully opened can be obtained a good proportional relationship, it is possible to adjust the reliable flow rate to a large flow rate from a minute flow rate, a wide range of flow rates it is possible to perform a flow control range.

なお、第一弁体11のテーパ部18の形状は、開度と流量を線形に比例させるように設けられているが、開度と流量のイコールパーセントの関係で調節できるように形状を変更して設けてもかまわない。 The shape of the tapered portion 18 of the first valve body 11 is provided so as to proportion the opening and the flow rate linearly changes the shape can be adjusted in relation to equal percentage of opening and the flow rate it may be provided Te.

特に本発明の流量調節弁は、第一ステム27外周面の雄ネジ部29と内周面の雌ネジ部28のピッチの差が、雄ネジ部29のピッチの20分の1から5分の1であるため、開度の微小調節が可能となり、全閉から全開に至るまで流路を調節する上で微小な開度の調節が可能であり、微小流量から大きな流量に至るまで、細かいオーダーで精度の良い流量調節を行うことができる。 In particular the flow control valve of the present invention, the difference between the pitch of the first stem 27 the outer peripheral surface of the male screw portion 29 and the inner peripheral surface of the female threaded portion 28, from one-twentieth of the pitch of the male thread portion 29 of the 5-minute since 1 enables fine adjustment of the opening degree is adjustable in very small opening in modulating the flow path up to the fully opened from the fully closed, the minute flow rate to large flow rate, fine order in can be performed with good flow regulation accuracy.

さらに、第一ステム27の下部内周面の雌ネジ部28に第二ステム19の雄ネジ部20を螺合させる構造にしたことにより、例えば特許文献2で示した従来の流量調節弁のようにピッチの異なる雄ネジ部をそれぞれ設けたステム構造だと上下方向の寸法が大きくなってしまうが、これに比べて本発明の流量調節弁では、第一ステム27の内周に第二ステム19を収納する構造となっており、上下方向の寸法を小さく納めることができ、流量調節弁をコンパクトにすることができる。 Furthermore, by having a structure screwing the male screw portion 20 of the second stem 19 into the female screw portion 28 of the lower inner peripheral surface of the first stem 27, for example as a conventional flow regulating valve shown in Patent Document 2 Although vertical dimension that it stem structure in which each different male threaded portion pitch is increased, the flow rate control valve of the present invention as compared to this, the second stem 19 to the inner periphery of the first stem 27 has a structure for housing the can pay small vertical dimension, a flow control valve can be made compact.

次に、流量調節弁が全開状態からハンドル32を逆に閉方向に回動させた場合は、開方向に回動させた場合とは逆の作動で弁体が降下し、流量調節弁の開度に応じて流量調節が行われる。 Then, when the flow rate control valve is rotated in the closing direction the handle 32 back from the fully opened state, the valve element in the reverse operation is lowered from the case is pivoted in the opening direction, the opening of the flow rate control valve the flow rate adjustment is performed according to degrees. ハンドル32を閉方向に回動させて全閉状態にした時には第二弁体12と弁座面2とが線接触によって確実な全閉シールを行うことができる。 The handle 32 when in the fully closed state is rotated in the closing direction can be performed securely fully closed seal by contact second valve body 12 and the valve seat surface 2 transgression line. なお、第一ステム27の下部外周のストッパー部30が隔膜押さえ21の挿入部22の上端面に接触することで回動を停止させる構造にしても良く、この場合、全閉シール時に弁座面2や第二弁体12に過剰な負荷がかかるのを防ぐことができる。 Incidentally, may be a structure in which the lower outer peripheral stopper part 30 of the first stem 27 stops the rotation by contact with the upper end surface of the insertion portion 22 of the diaphragm holder 21, the valve seat surface in this case, at the time of fully closing the seal overload the 2 or the second valve body 12 can be prevented according to the.

さらに流量調節弁が全閉状態のとき、第一弁体11は常に連通口4とは非接触であるため、流量調節弁の長期的な使用により、弁体や弁座面2が摩耗などによって変形することがなく、長期間の使用によって流量調節特性が安定できなくなることを防止するとともに、摺動時のパーティクルの発生を抑制することができる。 Further when the flow rate control valve is fully closed, since the first valve body 11 is always non-contact with the communication port 4, the long-term use of the flow control valve, such as by the valve body and the valve seat surface 2 wear deformation without having to, together with the flow rate adjusted characteristic is prevented from becoming impossible stabilized by long-term use, it is possible to suppress the occurrence of sliding of particles during.

(使用例) (Example of use)
本発明の使用例について図1を参照して説明する。 Referring to FIG. 1 will be described an example of using the present invention. 流体は第一流路5から流入し、連通口4と弁室3を通過して第二流路6から流出するが、第一流路5の流入口、第二流路6の流出口にはそれぞれ管継手(図示せず)が設けられており、第一流路5にはポンプなどの薬液圧送ライン(図示せず)が接続され、第二流路6には薬液が使用されるポイントまでのライン(図示せず)が接続される。 Fluid flows from the first flow path 5, but flows out from the second passage 6 through the communication port 4 and the valve chamber 3, the inlet of the first passage 5, the outlet of the second flow path 6, respectively pipe fitting (not shown) is provided, the chemical liquid pumping line such as a pump in the first flow path 5 (not shown) is connected to the second flow path 6 lines to the point where the chemical solution is used (not shown) is connected.

次に、弁体のリフト量をLとし、弁体の形状をそれぞれ変えた流量調節弁の開度に対する弁によって調節された流量Q(mL/min)を以下に示す方法に従って評価した。 Then, the lift amount of the valve body is L, were evaluated according to the method shown below regulated flow rate Q (mL / min) by a valve for opening of the flow control valve is changed each the shape of the valve body.

(流量測定) (Flow rate measurement)
図11のように、ポンプ62から一次圧0.05MPa、二次圧大気開放として流体を流し、弁61に本実施例の流量調節弁を用いて、秤63で流体の流量を測定するラインを使用して流量測定を行った。 As shown in FIG. 11, the pump 62 from the primary pressure 0.05 MPa, passed through the fluid as a secondary 圧大 air opening, with a flow rate control valve of this embodiment the valve 61, the line for measuring the flow rate of the fluid in the balance 63 It went the flow rate measured using. 23℃±2℃の雰囲気中において、流体は純水とし、配管の口径を6mmとして、弁体のリフト量Lを変化させ、それぞれのリフト量Lに対する1分間あたりの秤量を測定して流量Qを算出した。 In an atmosphere of 23 ° C. ± 2 ° C., the fluid is pure water, the diameter of the pipe as 6 mm, by changing the lift amount L of the valve body, the flow rate Q by measuring the weighing per minute for each of the lift amount L It was calculated. なお、各流量調節弁は弁体すなわち隔膜の形状のみ異なるものであり、他の部品はすべて同じ寸法のものを使用して測定を行った。 Each flow regulating valve is only different from the shape of the valve body i.e. membrane were all other parts are determined using those same dimensions.

(実施例1) (Example 1)
図7のように、本発明の第一弁体11と第二弁体12を設けた隔膜10の構造においてリフト量Lに対する流量Qを測定した。 As shown in FIG. 7, it was measured flow rate Q with respect to the lift amount L in the structure of the first valve body 11 and the diaphragm 10 provided with the second valve body 12 of the present invention. 測定結果を図12に示す。 The measurement results are shown in Figure 12.

(比較例1) (Comparative Example 1)
図8のように、第一弁体45のみ設けた隔膜44の構造においてリフト量Lに対する流量Qを測定した。 As shown in FIG. 8, it was measured flow rate Q with respect to the lift amount L in the structure of the diaphragm 44 provided only the first valve body 45. 測定結果を図12に示す。 The measurement results are shown in Figure 12.

(比較例2) (Comparative Example 2)
図9のように、第一弁体50が実施例1の第一弁体11の直線部17と同径の円柱形状となった隔膜49の構造においてリフト量Lに対する流量Qを測定した。 As shown in FIG. 9, it was measured flow rate Q with respect to the lift amount L in the structure of the diaphragm 49 first valve body 50 has a straight line portion 17 of the first valve body 11 of Example 1 with a cylindrical shape having the same diameter. 測定結果を図12に示す。 The measurement results are shown in Figure 12.

(比較例3) (Comparative Example 3)
図10のように、第二弁体58のみ設けた隔膜57の構造においてリフト量Lに対する流量Qを測定した。 As shown in FIG. 10, and measuring the flow rate Q with respect to the lift amount L in the structure of the diaphragm 57 provided only the second valve body 58. 測定結果を図12に示す。 The measurement results are shown in Figure 12.

図12からわかるように、実施例1では、流量調節弁の全閉から全開に至るまで、開度の微小なときには第二弁体12と弁座面2との開口面積S2による第二流量調節部42による流量調節を行い、開度を大きくすると第二流量調節部42から第一弁体11と連通口4との開口面積S1による第一流量調節部41に切り替わって流量調節が行われるため、リフト量Lの全範囲にわたって流量Qが良好な比例関係を示していることがわかる。 As can be seen from Figure 12, in Example 1, up to the fully opened from the fully closed flow control valve, the second flow rate regulation by the opening area S2 of the second valve body 12 and the valve seat surface 2 when opening the minute performs a flow control by section 42, since the flow rate adjustment is performed switched to the first flow rate regulator 41 by the opening area S1 of the second flow rate regulator 42 by increasing the degree of opening the first valve body 11 and the communication port 4 , it can be seen that the flow rate Q shows a good linear relationship over the entire range of lift L.

比較例1では、隔膜44の第一弁体45が連通口46に接触しないため第一弁体45と連通口46は常に微開状態にあり、第一弁体45が上昇し第一弁体45の直線部47が連通口46を通過し、テーパ部48が連通口46に上昇するまで流量調節ができないことがわかる(図12参照)。 In Comparative Example 1, the first valve body 45 and the communicating opening 46 for the first valve body 45 of the diaphragm 44 does not contact the communication port 46 is always in slightly open state, the first valve body first valve body 45 is raised 45 straight section 47 passes through the communication port 46 of the tapered portion 48 is seen can not flow adjusted to increase the communication port 46 (see FIG. 12). テーパ部48が連通口46まで上昇するとそれ以降は実施例1の流量調節弁と同様の流量特性が得られる。 When the tapered portion 48 is moved up to the communication port 46 later similar flow characteristics and flow control valve of the first embodiment can be obtained. なお、この微開領域で流量調節ができない状態は特許文献1で示した従来の流量調節弁の微開領域が調節できないものと同じ状態である。 The state in which this slightly open region can not flow modulation is the same state as that can not be adjusted slightly open area of ​​the conventional flow regulating valve shown in Patent Document 1.

比較例2では、隔膜49の第一弁体50が実施例1の第一弁体50が円柱形状となっているため、第一弁体50と連通口51とからなる第一流量調節部52の開口面積S1と第二弁体53と弁座面54とからなる第二流量調節部55の開口面積S2の関係において、S1>S2の場合は第一流量調節部52は円筒形状の第一弁体50と連通口4で流量を常に一定に調節し、流体は第一流量調節部52によってある程度流量を一定にさせた後、環状溝部56により形成される空間部分で流体の流れが抑制され急激な流量の増加を抑えることができ、さらに第二流量調節部55で精度良く流量を調節することができる。 In Comparative Example 2, since the first valve body 50 of the diaphragm 49 is the first valve element 50 of Example 1 has a cylindrical shape, a first flow rate adjusting section 52 composed of the first valve body 50 and communicating port 51. in the opening area S1 of the relationship between the opening area S2 of the second flow rate regulator 55 consisting of the second valve body 53 and the valve seat surface 54, S1> first flow rate regulator 52 in the case of S2, the first cylindrical the valve body 50 and adjusts the flow rate at the communication port 4 always constant, the fluid after being fixed to some extent flow by the first flow rate regulator 52, the flow of the fluid is suppressed by the spatial part formed by an annular groove 56 it is possible to suppress an increase in rapid flow can be adjusted accurately flow further in the second flow rate regulator 55. しかしS1≦S2の場合においては流量を調節する部分が第二流量調節部55から第一流量調節部52へと切り替わり、一方第一流量調節部52の開口面積S1は一定であることから、微開領域では流量調節が可能だが、以後リフト量Lを大きくしても流量は一定となる(図12参照)。 However since in the case of S1 ≦ S2 is switched from the part to adjust the flow rate the second flow rate regulator 55 to the first flow rate regulator 52, whereas the opening area S1 of the first flow rate regulator 52 is constant, fine but it can flow regulation in open areas, also the flow rate is constant by increasing the lift amount L hereinafter (see FIG. 12).

比較例3では、流量調節弁を開方向に回動させると隔膜57の第二弁体58と弁座面59からなる第二流量調節部60のみで流量調節されるため、リフト量Lに対して急激に流量が増加する(図12参照)。 In Comparative Example 3, only the second flow rate regulator 60 rotates the flow control valve in the opening direction consisting of the second valve body 58 and the valve seat surface 59 of the diaphragm 57 to be flow regulated with respect to the lift amount L rapid flow rate increases Te (see Fig. 12).

図12において比較例2と比較例3との比較から、本実施例の流量調節弁が微開時において、第二弁体12と弁座面2によって形成される第二流量調節部42のみでは微開領域の流量調節は不可能であり、第一弁体11の直線部17と連通口4によって形成される一定開口面積の第一流量調節部41によってある程度の流量を一定にさせた後、第二流量調節部42を調節することで微開領域の流量調節が可能となることを示している。 Comparison with Comparative Example 3 and Comparative Example 2 in FIG. 12, when the flow regulating valve is slightly open in the present embodiment, only the second flow rate regulator 42, which is formed by the second valve body 12 and the valve seat surface 2 flow rate adjustment of the fine opening area is not possible, after a certain degree of flow rate constant by the first flow rate regulator 41 of constant opening area formed by a straight portion 17 and the communication port 4 of the first valve body 11, It shows that it is possible to flow regulation in slightly open area by controlling the second flow rate regulator 42.

また、比較例1と比較例2の流量特性から流量調節可能領域を重ね合わせると本実施例の流量特性結果とほぼ一致していることがわかる。 Further, it can be seen that substantially coincides with superimposed a flow control area from the flow characteristics of Comparative Example 2 and Comparative Example 1 with a flow rate characteristic results of the present example. すなわち本発明の流量調節弁が第一流量調節部41と第二流量調節部42を持つことで、幅広い流量範囲で流量調節を行うことができる。 That is, by the flow control valve of the present invention has a first flow rate regulator 41 and the second flow rate regulator 42, it is possible to perform flow rate control over a wide flow rate range.

本発明は、化学工場、半導体製造分野、食品分野、バイオ分野などの各種産業における流体輸送配管のうち、広い流量範囲で微細な流量調節が求められ、なおかつパーティクルを嫌う用途、特に各種装置内の配管に使用される流量調節弁として好適に使用される。 The present invention, chemical plants, semiconductor manufacturing field, food field, among the fluid transport pipe in various industries such as biotechnology, wide flow range fine flow regulation sought, yet applications dislike particles, in particular the various devices It is suitably used as a flow control valve used for piping. また、コンパクトなので、配管スペースを小さくでき、装置のコンパクト化が求められる用途に好適である。 Moreover, since compact, the piping space can be reduced, it is suitable for applications where compactness of the device is required.

本発明の実施例を示す流量調節弁の全開状態を示す縦断面図である。 It is a longitudinal sectional view showing a full open state of the flow rate control valve showing an embodiment of the present invention. 図1の分解斜視図である。 It is an exploded perspective view of FIG. 図1の要部拡大縦断面図である。 It is an enlarged longitudinal sectional view of FIG. 図1の全閉状態を示す縦断面図である。 It is a longitudinal sectional view showing a fully closed state of FIG. 図4の要部拡大縦断面図である。 It is an enlarged longitudinal sectional view of FIG. 図1の半開状態を示す縦断面図である。 It is a longitudinal sectional view showing a half-open state of FIG. 図6の要部拡大縦断面図である。 It is an enlarged longitudinal sectional view of FIG. 隔膜が第一弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Diaphragm is an enlarged longitudinal sectional diagram of a flow regulating valve by only the first valve body. 隔膜が形状を円柱とした第一弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Diaphragm is an enlarged longitudinal sectional diagram of a flow control valve by the geometry only the first valve body in which a cylindrical. 隔膜が第二弁体のみによって構成される流量調節弁の要部拡大縦断面図である。 Diaphragm is an enlarged longitudinal sectional diagram of a flow regulating valve by only the second valve body. 流量Qの測定を行うための試験装置を示す概念構成図である。 It is a conceptual diagram showing a testing apparatus for measuring the flow rate Q. 流量調節弁のリフト量Lと流量Qの関係を示したグラフである。 Is a graph showing the relationship between the lift amount L and the flow rate Q of the flow rate control valve. 従来の弁座部と弁体のテーパ部が接触する流量調節弁を示す縦断面図である。 The tapered portion of the conventional valve seat and the valve body is a longitudinal sectional view showing a flow control valve in contact. 従来の弁座と弁体のテーパ部が接触しない流量調節弁を示す縦断面図である。 The tapered portion of the conventional valve seat and the valve body is a longitudinal sectional view showing a flow control valve which is not in contact. 従来の微小な開度を調節する流量調節弁を示す縦断面図である。 It is a longitudinal sectional view showing a flow control valve for adjusting the conventional small opening.

符号の説明 DESCRIPTION OF SYMBOLS

1 本体 2 弁座面 3 弁室 4 連通口 5 第一流路 6 第二流路 7 環状凹部 8 凹部 9 雄ネジ部 10 隔膜 11 第一弁体 12 第二弁体 13 薄膜部 14 環状係止部 15 環状溝部 16 接続部 17 直線部 18 テーパ部 19 第二ステム 20 雄ネジ部 21 隔膜押さえ 22 挿入部 23 嵌合部 24 鍔部 25 貫通孔 26 テーパ部 27 第一ステム 28 雌ネジ部 29 雄ネジ部 30 ストッパー部 32 ハンドル 33 把持部 34 第一ステム支持体 35 雌ネジ部 36 中空部 37 鍔部 38 ボンネット 39 係止部 40 雌ネジ部 41 第一流量調節部 42 第二流量調節部 43 天井面 44 隔膜 45 第一弁体 46 連通口 47 直線部 48 テーパ部 49 隔膜 50 第一弁体 51 連通口 52 第一流量調節部 53 第二弁体 54 弁座面 5 1 body 2 valve seat surface 3 valve chamber 4 communicating port 5 first passage 6 second channel 7 annular recess 8 recess 9 male threaded portion 10 diaphragm 11 first valve 12 second valve body 13 thin portion 14 annular engaging portion 15 annular groove 16 connection 17 linear portion 18 tapered portion 19 the second stem 20 male thread portion 21 diaphragm holder 22 inserted portion 23 fitting portion 24 the flange portion 25 through hole 26 tapered portion 27 first stem 28 female screw portion 29 male thread part 30 stopper portion 32 a handle 33 gripper 34 first stem support 35 female screw portion 36 hollow portion 37 the flange portion 38 the hood 39 the locking portion 40 female screw portion 41 a first flow rate adjusting section 42 second flow rate regulator 43 ceiling surface 44 diaphragm 45 first valve body 46 communication port 47 straight portion 48 tapered portion 49 diaphragm 50 first valve body 51 communication port 52 first flow rate regulator 53 the second valve body 54 valve seat surface 5 5 第二流量調節部 56 環状溝部 57 隔膜 58 第二弁体 59 弁座面 60 第二流量調節部 61 弁 62 ポンプ 63 秤 5 second flow rate regulator 56 the annular groove 57 diaphragm 58 second valve body 59 valve seat surface 60 second flow rate regulator 61 valve 62 pump 63 balance

Claims (4)

  1. 上部に設けられた弁室の底面に弁座面が形成され、弁座面の中心に設けられた連通口に連通する第一流路と弁室に連通する第二流路を有する本体と、 Valve seat surface to the bottom surface of the provided valve chamber at the top is formed, the body having a second passage communicating with the first flow path and a valve chamber communicating with the communication port provided in the center of the valve seat surface,
    ステムの軸方向の進退移動により連通口に挿入可能で接液面の中心から垂下突設された第一弁体と、弁座面に接離可能にされ該第一弁体から径方向へ隔離した位置に形成された円環状凸条の第二弁体と、該第二弁体から径方向へ連続して形成された薄膜部とが一体的に設けられた隔膜とを具備することを特徴とする流量調節弁。 Isolating a first valve body which is suspended projects from insertable center of the wetted surface to the communication port by reciprocating movement in the axial direction of the stem, from the first valve body is in separably on the valve seat surface in the radial direction wherein the the second valve body annular convex formed at a position, and a thin film portion formed continuously from the second valve body in the radial direction by including a diaphragm integrally provided with flow control valve to be.
  2. 上部にハンドルが固着され下部内周面に雌ネジ部と外周面に該雌ねじ部のピッチより大きいピッチを有する雄ネジ部を有する第一ステムと、 A first stem having a male threaded portion having a larger pitch than the pitch of the female screw portion into the female screw portion and the outer peripheral surface on the lower inner peripheral surface the handle is fixed to the upper,
    内周面に該第一ステムの雄ネジ部と螺合する雌ネジ部を有する第一ステム支持体と、 A first stem support having a female screw portion to be screwed with the male screw portion of the first stem to the inner peripheral surface,
    上部外周面に第一ステムの雌ネジ部に螺合される雄ネジ部を有し下端部に隔膜が接続される第二ステムと、 A second stem diaphragm is connected to the lower end portion has a male screw portion screwed into the female screw portion of the first stem to the upper outer peripheral surface,
    前記第一ステム支持体の下方に位置し該第二ステムを上下移動自在かつ回動不能に支承する隔膜押さえと、 A diaphragm holder for supporting the said second stem so as not to vertically movable and rotational position below the first stem support,
    第一ステム支持体と隔膜押さえを固定するボンネットとを具備することを特徴とする請求項1に記載の流量調節弁。 Flow control valve according to claim 1, characterized in that it comprises a hood for securing a first stem support and the diaphragm holder.
  3. 第一ステムの外周面に設けられた雄ネジ部と下部内周面に設けられた雌ネジ部のピッチの差が、雄ネジ部のピッチの20分の1から5分の1であることを特徴とする請求項2に記載の流量調節弁。 That the difference in pitch of the female thread portion provided on the male screw portion and the lower inner peripheral surface provided on the outer peripheral surface of the first stem is from 1 to 1/20 of the pitch of the male thread portion of the 5 minutes flow control valve according to claim 2, characterized.
  4. 隔膜がポリテトラフルオロエチレンからなることを特徴とする請求項1乃至請求項3のいずれかに記載の流量調節弁。 Flow control valve according to any one of claims 1 to 3, characterized in that the diaphragm is made of polytetrafluoroethylene.
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WO2007023970A1 (en) * 2005-08-22 2007-03-01 Asahi Organic Chemicals Industry Co., Ltd. Fluid control apparatus
WO2007023972A1 (en) * 2005-08-22 2007-03-01 Asahi Organic Chemicals Industry Co., Ltd. Fluid control apparatus
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JP2007057270A (en) * 2005-08-22 2007-03-08 Asahi Organic Chem Ind Co Ltd Fluid monitoring apparatus
JP2007058336A (en) * 2005-08-22 2007-03-08 Asahi Organic Chem Ind Co Ltd Fluid control device
JP2007175691A (en) * 2005-12-02 2007-07-12 Asahi Organic Chem Ind Co Ltd Fluid mixing apparatus
JP2007175689A (en) * 2005-12-02 2007-07-12 Asahi Organic Chem Ind Co Ltd Fluid mixing apparatus
JP2007253041A (en) * 2006-03-22 2007-10-04 Asahi Organic Chem Ind Co Ltd Fluid mixer
JP2007253036A (en) * 2006-03-22 2007-10-04 Asahi Organic Chem Ind Co Ltd Fluid mixer
JP2007253039A (en) * 2006-03-22 2007-10-04 Asahi Organic Chem Ind Co Ltd Fluid mixing device
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JP2012107762A (en) * 2005-12-02 2012-06-07 Ckd Corp Flow control valve
JP2013108647A (en) * 2011-11-18 2013-06-06 Daikin Industries Ltd Electronic expansion valve and air conditioner
JP2014062559A (en) * 2012-09-20 2014-04-10 Rinnai Corp Three-way valve
JP2014202355A (en) * 2013-04-10 2014-10-27 サーパス工業株式会社 Flow rate control device
JP2016114240A (en) * 2014-12-11 2016-06-23 Ckd株式会社 The fluid control valve and fluid control method

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JP2014202355A (en) * 2013-04-10 2014-10-27 サーパス工業株式会社 Flow rate control device
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