JP2017180797A - Diaphragm valve - Google Patents

Diaphragm valve Download PDF

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JP2017180797A
JP2017180797A JP2016073173A JP2016073173A JP2017180797A JP 2017180797 A JP2017180797 A JP 2017180797A JP 2016073173 A JP2016073173 A JP 2016073173A JP 2016073173 A JP2016073173 A JP 2016073173A JP 2017180797 A JP2017180797 A JP 2017180797A
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diaphragm
valve
flow path
valve body
bonnet
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JP6723550B2 (en
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圭吾 小林
Keigo Kobayashi
圭吾 小林
薬師神 忠幸
Tadayuki Yakushijin
忠幸 薬師神
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Fujikin Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a diaphragm valve capable of reducing a pressure receiving area, and reducing occurrence or intrusion of minute foreign matters.SOLUTION: A diaphragm valve is characterized in that a plurality of stage parts is formed above a flow passage of a valve body, a diaphragm contains a center part formed so as to continue to a peripheral edge part through a bend part, a projection part including a shape capable of closing a flow passage is formed below the center part of the diaphragm, the peripheral edge part of the diaphragm is held and fixed between one stage part among the plurality of stage parts and a bonnet, the diaphragm and another stage among the plurality of stage parts contact with or separate from each other by vertical motion of an operation mechanism, and a flow passage can be closed by the projection part.SELECTED DRAWING: Figure 1

Description

本発明はダイヤフラム弁に関する。 The present invention relates to a diaphragm valve.

ダイヤフラム弁として、従来、特許文献1に開示されたものが知られている。ダイヤフラム弁は、図8に示されるように、入口流路(2)と出口流路(3)を備えたバルブボディ(4)と、該バルブボディ(4)の上面とボンネット(5)の下面との間に挟持固定されたダイヤフラム(6)と、該ダイヤフラム(6)を上下動させる操作機構(7)とを具備している。   As a diaphragm valve, what was disclosed by patent document 1 is conventionally known. As shown in FIG. 8, the diaphragm valve includes a valve body (4) having an inlet channel (2) and an outlet channel (3), an upper surface of the valve body (4), and a lower surface of the bonnet (5). And a diaphragm (6) clamped between and an operation mechanism (7) for moving the diaphragm (6) up and down.

入口流路(2)と出口流路(3)は図示の如く同一軸線上に配置されており、且つ入口流路(2)と出口流路(3)は突起の無い連絡流路(8)を介して連通されている。特許文献1のダイヤフラム弁は、図示されているとおり、入口流路(2)と出口流路(3)が、突起の無い連絡流路(8)を介して連通されているので、流路内に溜まりが発生することがなく、洗浄性が良い。   The inlet channel (2) and the outlet channel (3) are arranged on the same axis as shown in the figure, and the inlet channel (2) and the outlet channel (3) are a communication channel (8) having no projection. It is communicated through. In the diaphragm valve of Patent Document 1, the inlet channel (2) and the outlet channel (3) are communicated with each other via a communication channel (8) having no protrusion, as shown in the drawing. No stagnation occurs and cleaning is good.

特許第4232939号公報Japanese Patent No. 4232939

叙上の特許文献1記載のダイヤフラム弁はベローズ等と同じ無漏洩タイプであるので、摺動部を持つ他の弁に比して気密性に優れ、異物の発生と内部への異物の混入が少ないという利点がある。しかし、ダイヤフラムが圧力を受ける面積が大きいので、流体を閉止するために必要な推力は大きくなる。
そこで、本発明は、従来のダイヤフラム弁を改良することで、受圧面積を小さくし、微小異物の発生・混入を低減することができるダイヤフラム弁を提供することを目的とする。
Since the diaphragm valve described in the above-mentioned patent document 1 is the same leak-free type as the bellows or the like, it has excellent airtightness compared to other valves having a sliding part, and foreign matter is generated and foreign matter is mixed inside. There is an advantage of less. However, since the area where the diaphragm receives pressure is large, the thrust required to close the fluid increases.
Accordingly, an object of the present invention is to provide a diaphragm valve that can reduce the pressure receiving area and reduce the generation / mixing of minute foreign matters by improving the conventional diaphragm valve.

本発明の第1の態様は、流体の入口及び出口と流路を備えたバルブボディと、前記バルブボディと接続するボンネットと、前記バルブボディと前記ボンネットとの間に挟持固定されたダイヤフラムと、前記ダイヤフラムを上下動させる操作機構とからなり、前記ダイヤフラムの上下動により流路を開閉するダイヤフラム弁であって、
前記バルブボディの前記流路の上方に複数の段部が形成され、
前記ダイヤフラムは周縁部と屈曲部を介して連続的に形成された中央部を含み、
前記ダイヤフラムの前記中央部の下方に、前記流路を閉塞し得る形状を備えた突起部が形成され、
前記ダイヤフラムの前記周縁部が、前記複数の段部のうちの1つの段部と前記ボンネットとの間に挟持固定され、
前記操作機構の上下動により、前記ダイヤフラムと前記複数の段部のうちの他の1つの段とが当接離間し、前記突起部により前記流路を閉塞し得る
ことを特徴とするダイヤフラム弁に関する。
A first aspect of the present invention is a valve body having fluid inlets and outlets and a flow path, a bonnet connected to the valve body, a diaphragm sandwiched and fixed between the valve body and the bonnet, An operation mechanism that moves the diaphragm up and down, and a diaphragm valve that opens and closes the flow path by moving the diaphragm up and down;
A plurality of steps are formed above the flow path of the valve body,
The diaphragm includes a central portion formed continuously through a peripheral portion and a bent portion,
A protrusion having a shape capable of closing the flow path is formed below the central portion of the diaphragm,
The peripheral edge of the diaphragm is clamped and fixed between one step of the plurality of steps and the bonnet,
The diaphragm valve is characterized in that the diaphragm and the other one of the plurality of steps are brought into contact with and separated from each other by the vertical movement of the operation mechanism, and the flow path can be closed by the protrusion. .

また、前記バルブボディの前記複数の段部の間に枝管部を有することが好ましい。   Moreover, it is preferable to have a branch pipe part between the plurality of step parts of the valve body.

本発明の請求項1によれば、ダイヤフラムは周縁部と屈曲部を介して連続的に形成された中央部から形成されているので、有効受圧面積を小さくすることができ、ひいてはバルブを開から閉に駆動する際に操作機構がダイヤフラムを上下動させるために必要な力(推力)を低減することができる。
ここで、有効受圧面積とは、バルブを開から閉に駆動させる際にダイヤフラムが動く部分の面積のことを言う。ダイヤフラムの有効受圧面積部分がダイヤフラムを上下動させる操作機構の駆動により、変形することで流路を開閉する。
According to the first aspect of the present invention, since the diaphragm is formed from the central portion formed continuously through the peripheral edge portion and the bent portion, the effective pressure receiving area can be reduced, and as a result, the valve can be opened. The force (thrust) required for the operating mechanism to move the diaphragm up and down when driving in the closed state can be reduced.
Here, the effective pressure receiving area refers to the area of the portion where the diaphragm moves when the valve is driven from open to closed. The effective pressure receiving area of the diaphragm is deformed by driving an operating mechanism that moves the diaphragm up and down to open and close the flow path.

また、本発明の請求項1によれば、バルブボディは流路の上方に複数の段部が形成され、ダイヤフラムの中央部の下方に、前記流路を閉塞し得る形状を備えた突起部が形成されているので、バルブの閉止時にダイヤフラムが圧力を受ける面積小さくなり、ひいてはバルブの閉止時にダイヤフラムを上下動させる操作機構に対して流体が押し返す力を低減することができ、操作機構の保持力が向上する。
また、ダイヤフラムが変形しながらバルブボディのシール面に接触させる従来のダイヤフラムバルブと比較して、ボディとの滑りが起こりにくく微小異物の発生・混入を低減することができるダイヤフラム弁を提供することができる。
本発明の請求項2によれば、前記バルブボディの前記複数の段部の間に枝管部が形成されているのでバルブ使用時の液溜まりを防止でき、洗浄する際の洗浄性が良好になるダイヤフラム弁を提供することができる。
According to claim 1 of the present invention, the valve body has a plurality of stepped portions formed above the flow path, and a protrusion having a shape capable of closing the flow path is provided below the central portion of the diaphragm. As a result, the area under which the diaphragm receives pressure when the valve is closed is reduced. As a result, the force that the fluid pushes back against the operating mechanism that moves the diaphragm up and down when the valve is closed can be reduced. Will improve.
Further, it is possible to provide a diaphragm valve that is less likely to slip with the body and can reduce the generation / mixing of minute foreign matter compared to a conventional diaphragm valve that contacts the sealing surface of the valve body while the diaphragm is deformed. it can.
According to the second aspect of the present invention, since the branch pipe portion is formed between the plurality of step portions of the valve body, it is possible to prevent liquid accumulation during use of the valve and to improve the cleaning performance when cleaning. A diaphragm valve can be provided.

本発明の一実施形態に係るダイヤフラム弁の一例を示す一部切り欠き断面斜視図である。It is a partially cutaway cross-sectional perspective view showing an example of a diaphragm valve according to an embodiment of the present invention. 図1のダイヤフラム弁のバルブボディを示す斜視図である。It is a perspective view which shows the valve body of the diaphragm valve of FIG. 本発明の他の実施形態に係るダイヤフラム弁の一例を示す断面斜視図である。It is a cross-sectional perspective view which shows an example of the diaphragm valve which concerns on other embodiment of this invention. 図3のダイヤフラム弁の分解断面図である。FIG. 4 is an exploded cross-sectional view of the diaphragm valve of FIG. 3. 図1及び図3のダイヤフラム弁を構成するダイヤフラムの斜視図である。It is a perspective view of the diaphragm which comprises the diaphragm valve of FIG.1 and FIG.3. (a)は図3のダイヤフラム弁におけるダイヤフラム下降時の動作説明図、(b)は図1のダイヤフラム弁におけるダイヤフラム上昇時の動作説明図である。(A) is operation | movement explanatory drawing at the time of the diaphragm fall in the diaphragm valve of FIG. 3, (b) is operation | movement explanatory drawing at the time of the diaphragm raising in the diaphragm valve of FIG. 図1のダイヤフラム弁と従来のダイヤフラムの有効受圧面積の根拠であるそれぞれの直径を例証する図である。It is a figure which illustrates each diameter which is the basis of the effective pressure receiving area of the diaphragm valve of FIG. 1, and the conventional diaphragm. 従来のダイヤフラム弁の一例を示す説明図である。It is explanatory drawing which shows an example of the conventional diaphragm valve.

添付図面を参照しつつ、本発明の実施形態に係るダイヤフラム弁について以下に詳細に説明する。 A diaphragm valve according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[実施形態1]
図1―2及び5を参照すると、本実施形態のダイヤフラム弁(1)は、流体の入口及び出口となる流路(P)と流路(P)の上方に2つの段部(ST1、ST3)が形成されたバルブボディ(4)と、ボンネット(5)と、ダイヤフラム(7)を具備している。
また、ここでいう上下左右とは図1を参考にしており、上下とはダイヤフラムが動作する方向で、左右とは流路の方向をいう。
ここで図2を参照すると、2つの段部(ST1、ST3)のうちの一方の段部(ST1)はボンネット(5)側に設けられており、他方の段部(ST3)は一方の段部(ST1)に対して流路側に凹んだ形状で設けられている。そして図2に示されるように、一方の段部(ST1)の径D1と、他方の段部(ST3)の径D3には、D1>D3の関係がある。
[Embodiment 1]
Referring to FIGS. 1-2 and 5, the diaphragm valve (1) of the present embodiment has two steps (ST1, ST3) above the flow path (P) and the flow path (P) that serve as the inlet and outlet of the fluid. ) Formed with a valve body (4), a bonnet (5), and a diaphragm (7).
In addition, the term “upper and lower left and right” here refers to FIG.
Referring now to FIG. 2, one of the two steps (ST1, ST3) (ST1) is provided on the bonnet (5) side, and the other step (ST3) is one of the steps. It is provided in a shape that is recessed toward the flow path with respect to the portion (ST1). As shown in FIG. 2, the diameter D1 of one step (ST1) and the diameter D3 of the other step (ST3) have a relationship of D1> D3.

ついで、図1及び5を参照すると本実施形態のダイヤフラム弁(1)を構成するダイヤフラム(7)は、中央部(C)と、その周縁部(PF)とを含んでおり、中央部(C)と周縁部(PF)の間に連続的に形成された屈曲部(FL)を含んでいる。より詳しくは、図4を参照すると、ダイヤフラム(7)のステム(7a)が突設される側の面において、ステム(7a)に最も近い部位を中央部(C)と定義し、中央部(C)から連続して形成され且つ中央部(C)よりもステム(7a)から離間したドーム状の部位を屈曲部(FL)と定義し、屈曲部(FL)から連続して形成され且つ屈曲部(FL)よりも更にステム(7a)から離間した自由端を含む部位(最外部)を周縁部(PF)と定義している。ダイヤフラム(7)は、中央部(C)の下面(CL)より、突起部(PJ)が、図から見て下方に突出している(図5参照)。周縁部(PF)はバルブボディ(4)の一方の段部(ST1)とボンネット(5)との間に挟持固定されている。周縁部(PF)は円周状に形成された突起で、バルブボディ(4)に円周状に形成された凹所(R)に嵌入される。図1を参照すると、必須の構成ではないが、ボンネット(5)のバルブボディ(4)と対向する側にOリング(OR)が嵌入され、ダイヤフラム(7)の周縁部(PF)の内側を押圧することで更にシール性が向上する。   Next, referring to FIGS. 1 and 5, the diaphragm (7) constituting the diaphragm valve (1) of this embodiment includes a central portion (C) and a peripheral portion (PF) thereof, and the central portion (C ) And a peripheral portion (PF), a bent portion (FL) formed continuously is included. More specifically, referring to FIG. 4, a portion closest to the stem (7a) is defined as a central portion (C) on the surface of the diaphragm (7) on which the stem (7a) is protruded, and the central portion (C) The dome-shaped portion formed continuously from C) and further away from the stem (7a) than the central portion (C) is defined as a bent portion (FL), and formed continuously from the bent portion (FL) and bent. A part (outermost part) including a free end that is further away from the stem (7a) than the part (FL) is defined as a peripheral part (PF). As for the diaphragm (7), the protrusion part (PJ) protrudes below from the lower surface (CL) of the center part (C) as seen from the drawing (see FIG. 5). The peripheral edge (PF) is clamped and fixed between one step (ST1) of the valve body (4) and the bonnet (5). The peripheral edge (PF) is a protrusion formed in a circumferential shape, and is fitted into a recess (R) formed in the valve body (4). Referring to FIG. 1, although not essential, an O-ring (OR) is fitted on the side of the bonnet (5) facing the valve body (4), and the inside of the peripheral edge (PF) of the diaphragm (7) is inserted. Sealing performance is further improved by pressing.

ダイヤフラム(7)の材質としては、限定されないが、例えば従来から知られた天然ゴム、ニトリルゴム、スチレンゴム、フッ素ゴム(FPM)、エチレンプロピレンゴム(EPDM)などのゴム材料が採用され得る。本実施形態のダイヤフラム(7)は該ゴム材料のみからなる単層構造であっても、該ゴム材料から構成されるゴム膜にポリ四フッ化エチレン(PTFE)などの合成樹脂膜を積層した二層構造であってもよい。更に本出願人の先願発明(国際公開第2013/179739号)において開示した炭素繊維、合成樹脂、金属等からなる補強布をダイヤフラム(7)に内在させることも可能である。   The material of the diaphragm (7) is not limited, and for example, conventionally known rubber materials such as natural rubber, nitrile rubber, styrene rubber, fluorine rubber (FPM), and ethylene propylene rubber (EPDM) can be employed. Even if the diaphragm (7) of the present embodiment has a single-layer structure made only of the rubber material, a synthetic resin film such as polytetrafluoroethylene (PTFE) is laminated on the rubber film made of the rubber material. It may be a layered structure. Further, a reinforcing cloth made of carbon fiber, synthetic resin, metal or the like disclosed in the applicant's prior invention (International Publication No. 2013/179739) can be incorporated in the diaphragm (7).

ダイヤフラム弁(1)を構成するバルブボディ(4)の流路(P)は入口側流路(2)と出口側流路(3)は連通されている。また、バルブボディ(4)の他方の段部(ST3)は、ダイヤフラム(7)の中央部(C)の下面(CL)が載置される座(S)として機能する。
ここで図1、図4及び図7を参照すると、従来のダイヤフラム弁のダイヤフラムではバルブボディ(4)の一方の段部(ST1)とボンネット(5)との間に挟持固定されている側(下側)に動く構造(この動く面積を「有効受圧面積」と言う)であった。バルブを開から閉に駆動するに要するエネルギーは、有効受圧面積×圧力×移動量となるため、バルブを閉止するために大きい力を要していた。これに対し本実施形態の場合におけるダイヤフラム(7)では、有効受圧面積の根拠となる直径(Dfl)はダイヤフラム(7)の屈曲部(FL)の頂点間を結ぶ直径である。すなわちDfl<D1であるので、ダイヤフラム弁(1)を開から閉に駆動する際に操作機構がダイヤフラム(7)を上下動させるために必要な力(推力)を低減することができる。ここで、有効受圧面積とは、バルブを開から閉に駆動させる際にダイヤフラム(7)が動く部分の面積のことを言う。ダイヤフラム(7)の有効受圧面積部分がダイヤフラムを上下動させる操作機構の駆動により、変形することで流路を開閉する。
本実施形態のダイヤフラム弁(1)を構成するダイヤフラム(7)には、ダイヤフラム(7)を上下動させる操作機構の一部であるステム(9)の根元部がダイヤフラム(7)の中央部(C)の、図から見て上部空間(7c)(図4参照)内に埋め込まれ固定されている。ここで「ステム」とは、操作機構がダイヤフラムを上下動させる力をダイヤフラムに伝える働きをするものを言い、ダイヤフラムに埋め込まれている。
また、本発明の請求項1、2によれば、バルブボディ(4)は流路(P)の上方に2つの段部(ST1、ST3)が形成され、ダイヤフラム(7)の中央部の下方に、流路を閉塞し得る形状を備えた突起部(PJ)が形成されているので、バルブの閉止時にダイヤフラム(7)が圧力を受ける面積が小さくなり、ひいてはバルブの閉止時にダイヤフラム(7)を上下動させる操作機構に対して流体が押し返す力を低減することができ、操作機構の保持力が向上する。また、ダイヤフラム(7)が変形しながらバルブボディのシール面に接触させる従来のダイヤフラムバルブと比較して、ボディとの滑りが起こりにくく微小異物の発生・混入を低減することができるダイヤフラム弁を提供することができる。
In the flow path (P) of the valve body (4) constituting the diaphragm valve (1), the inlet side flow path (2) and the outlet side flow path (3) are communicated with each other. The other step (ST3) of the valve body (4) functions as a seat (S) on which the lower surface (CL) of the central portion (C) of the diaphragm (7) is placed.
1, 4, and 7, in the diaphragm of the conventional diaphragm valve, the side sandwiched and fixed between one step portion (ST1) of the valve body (4) and the bonnet (5) ( It was a structure that moved to the lower side (this moving area is called "effective pressure receiving area"). Since the energy required to drive the valve from open to closed is effective pressure receiving area × pressure × movement amount, a large force is required to close the valve. On the other hand, in the diaphragm (7) in the case of the present embodiment, the diameter (Dfl) as the basis of the effective pressure receiving area is a diameter connecting the apexes of the bent portion (FL) of the diaphragm (7). That is, since Dfl <D1, it is possible to reduce the force (thrust) required for the operating mechanism to move the diaphragm (7) up and down when driving the diaphragm valve (1) from open to closed. Here, the effective pressure receiving area refers to the area of the portion where the diaphragm (7) moves when the valve is driven from open to closed. The effective pressure receiving area portion of the diaphragm (7) is deformed by driving an operating mechanism that moves the diaphragm up and down, thereby opening and closing the flow path.
In the diaphragm (7) constituting the diaphragm valve (1) of the present embodiment, the root portion of the stem (9) which is a part of the operation mechanism for moving the diaphragm (7) up and down is the central portion of the diaphragm (7) ( C) is embedded and fixed in the upper space (7c) (see FIG. 4) as seen from the figure. Here, the “stem” refers to a mechanism in which an operating mechanism transmits a force for moving the diaphragm up and down to the diaphragm, and is embedded in the diaphragm.
According to claims 1 and 2 of the present invention, the valve body (4) is formed with two step portions (ST1, ST3) above the flow path (P), and below the central portion of the diaphragm (7). Further, since the projection (PJ) having a shape capable of closing the flow path is formed, the area where the diaphragm (7) receives pressure when the valve is closed is reduced, and as a result, the diaphragm (7) when the valve is closed. The force by which the fluid pushes back against the operation mechanism that moves the valve up and down can be reduced, and the holding force of the operation mechanism is improved. In addition, a diaphragm valve is provided that is less likely to slip with the body and can reduce the generation and mixing of minute foreign objects compared to a conventional diaphragm valve that contacts the sealing surface of the valve body while the diaphragm (7) is deformed. can do.

[実施形態2]
図3―6を参照すると、実施形態2のダイヤフラム弁(1)のバルブボディ(4)に形成されている段部において、第1段部(ST1)、第2段部(ST2)及び第3段部(ST3)のように3段以上あってもよい。ここで図3を参照すると、バルブボディ(4)の上部にボンネット(5)側から順に、第1段部(ST1)、第2段部(ST2)及び第3段部(ST3)が設けられている。そして第1段部(ST1)、第2段部(ST2)及び第3段部(ST3)のそれぞれの径D1、D2及びD3には、D1>D2>D3の関係がある。
[Embodiment 2]
Referring to FIGS. 3-6, in the step portion formed in the valve body (4) of the diaphragm valve (1) of the second embodiment, the first step portion (ST1), the second step portion (ST2), and the third step portion. There may be three or more steps as in the step (ST3). Referring now to FIG. 3, a first stage (ST1), a second stage (ST2), and a third stage (ST3) are provided in order from the bonnet (5) side on the top of the valve body (4). ing. The diameters D1, D2, and D3 of the first step portion (ST1), the second step portion (ST2), and the third step portion (ST3) have a relationship of D1>D2> D3.

つぎに、本実施形態に係るダイヤフラム弁(1)の動作を説明する。ダイヤフラム(7)が操作機構により下降すると、図6の(a)に示されるように、中央部(C)が窪む。その結果、ダイヤフラム(7)の中央部(C)の下面(CL)がバルブボディ(4)の座(S)と密着し、連絡流路(P)が、突起部(PJ)によって閉塞され、流路(P)が閉鎖される。それゆえ、受圧面積を小さくし、微小異物の発生・混入を低減することができるダイヤフラム弁を提供することができる。   Next, the operation of the diaphragm valve (1) according to this embodiment will be described. When the diaphragm (7) is lowered by the operation mechanism, the center portion (C) is depressed as shown in FIG. As a result, the lower surface (CL) of the central portion (C) of the diaphragm (7) is in close contact with the seat (S) of the valve body (4), and the communication channel (P) is blocked by the protrusion (PJ), The flow path (P) is closed. Therefore, it is possible to provide a diaphragm valve that can reduce the pressure receiving area and reduce the generation and mixing of minute foreign matters.

ダイヤフラム(7)が操作機構により上昇すると、図6の(b)に示されるように、中央部(C)が上方に隆起し、その結果、バルブボディ(4)の座(S)との間に隙間が生じ、突起部(PJ)が上方に移動され、流路(P)が開放される。   When the diaphragm (7) is lifted by the operation mechanism, as shown in FIG. 6 (b), the central portion (C) is raised upward, and as a result, between the seat (S) of the valve body (4). A gap is generated in the projection, the protrusion (PJ) is moved upward, and the flow path (P) is opened.

図3及び4を参照すると、3段部(ST3)の上方に形成された第2段部(ST2)と流路(P)とダイヤフラム(7)によって形成された空間(SP)が、流路(P)に枝管部(BP)が形成されており、この空間(SP)と枝管部(BP)が連通する。枝管部(BP)を介して空間(SP)内に流入した流体が、座(S)とダイヤフラム(7)との間の隙間より解放される。それゆえ、バルブ使用時の液溜まりを防止でき、洗浄する際の洗浄性が良好なダイヤフラム弁を提供することができる。図3を参照すると、本実施形態においては、図から見て左下部の流路(2)が上流側で、右下部の流路(3)が下流側であるが、枝管部(BP)は上流側に設けられている。しかし、この構成に限られない。枝管部(BP)は下流側に設けられ得る。   Referring to FIGS. 3 and 4, the space (SP) formed by the second step portion (ST2) formed above the third step portion (ST3), the flow path (P), and the diaphragm (7) is a flow path. A branch pipe (BP) is formed in (P), and the space (SP) and the branch pipe (BP) communicate with each other. The fluid flowing into the space (SP) through the branch pipe (BP) is released from the gap between the seat (S) and the diaphragm (7). Therefore, it is possible to provide a diaphragm valve that can prevent liquid accumulation during use of the valve and has good cleaning properties when cleaning. Referring to FIG. 3, in the present embodiment, the lower left channel (2) is the upstream side and the lower right channel (3) is the downstream side as seen from the figure, but the branch pipe part (BP). Is provided upstream. However, it is not limited to this configuration. A branch pipe part (BP) may be provided in the downstream.

本発明のダイヤフラム弁は、洗浄されることが想定される流体や、蒸留ラインに好適に使用され得る。   The diaphragm valve of the present invention can be suitably used for a fluid that is supposed to be washed and a distillation line.

1 ダイヤフラム弁
2 入口側流路
3 出口側流路
4 バルブボディ
6 従来のダイヤフラム
7 ダイヤフラム
7c 上部空間
9 ステム
BP 枝管部
C 中央部
Cl 中央部の下面
D1、D2、D3 第1、第2及び第3段部の径
FL 屈曲部
PF 周辺部
PJ 突起部
R 凹所
S 座
SP 空間
ST1 第1段部(一方の段部)
ST2 第2段部
ST3 第3段部(他方の段部)
DESCRIPTION OF SYMBOLS 1 Diaphragm valve 2 Inlet side flow path 3 Outlet side flow path 4 Valve body 6 Conventional diaphragm 7 Diaphragm 7c Upper space 9 Stem BP Branch pipe part C Central part Cl The lower surface D1, D2, D3 of 1st, 2nd and 2nd Diameter FL of third step portion Bent portion PF Peripheral portion PJ Projection portion R Recess S Seat SP Space ST1 First step portion (One step portion)
ST2 Second step ST3 Third step (the other step)

Claims (2)

流体の入口及び出口と流路を備えたバルブボディと、前記バルブボディと接続するボンネットと、前記バルブボディと前記ボンネットとの間に挟持固定されたダイヤフラムと、前記ダイヤフラムを上下動させる操作機構とからなり、前記ダイヤフラムの上下動により流路を開閉するダイヤフラム弁であって、
前記バルブボディの前記流路の上方に複数の段部が形成され、
前記ダイヤフラムは周縁部と屈曲部を介して連続的に形成された中央部を含み、
前記ダイヤフラムの前記中央部の下方に、前記流路を閉塞し得る形状を備えた突起部が形成され、
前記ダイヤフラムの前記周縁部が、前記複数の段部のうちの1つの段部と前記ボンネットとの間に挟持固定され、
前記操作機構の上下動により、前記ダイヤフラムと前記複数の段部のうちの他の1つの段とが当接離間し、前記突起部により前記流路を閉塞し得る
ことを特徴とするダイヤフラム弁。
A valve body having a fluid inlet and outlet, a flow path, a bonnet connected to the valve body, a diaphragm sandwiched and fixed between the valve body and the bonnet, and an operating mechanism for moving the diaphragm up and down A diaphragm valve that opens and closes the flow path by the vertical movement of the diaphragm,
A plurality of steps are formed above the flow path of the valve body,
The diaphragm includes a central portion formed continuously through a peripheral portion and a bent portion,
A protrusion having a shape capable of closing the flow path is formed below the central portion of the diaphragm,
The peripheral edge of the diaphragm is clamped and fixed between one step of the plurality of steps and the bonnet,
The diaphragm valve, wherein the diaphragm and the other one of the plurality of steps are brought into contact with and separated from each other by the vertical movement of the operation mechanism, and the flow path can be blocked by the protrusion.
前記バルブボディの前記複数の段部の間に枝管部を有する請求項1に記載のダイヤフラム弁。   The diaphragm valve according to claim 1, further comprising a branch pipe portion between the plurality of step portions of the valve body.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4098913A1 (en) 2021-06-01 2022-12-07 Gregor Gaida Diaphragm-type valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4098913A1 (en) 2021-06-01 2022-12-07 Gregor Gaida Diaphragm-type valve

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