JPH06346761A - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPH06346761A JPH06346761A JP13806093A JP13806093A JPH06346761A JP H06346761 A JPH06346761 A JP H06346761A JP 13806093 A JP13806093 A JP 13806093A JP 13806093 A JP13806093 A JP 13806093A JP H06346761 A JPH06346761 A JP H06346761A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- conduit
- valve
- outer peripheral
- butterfly valve
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
- F02D9/1045—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing for sealing of the flow in closed flap position, e.g. the housing forming a valve seat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば自動車の排気シ
ャッタとして用いられるバタフライバルブに係り、特
に、弁体閉止時における密閉度を高めうるようにしたバ
タフライバルブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve used as, for example, an exhaust shutter of an automobile, and more particularly to a butterfly valve capable of increasing the degree of sealing when the valve body is closed.
【0002】[0002]
【従来の技術】図3は、上述した排気シャッタ等に用い
られる従来のバタフライバルブ(A)の一例を示す一部切
欠斜視図である。2. Description of the Related Art FIG. 3 is a partially cutaway perspective view showing an example of a conventional butterfly valve (A) used for the above-mentioned exhaust shutter and the like.
【0003】このバタフライバルブ(A)は、流体流通用
の管路(1)内に、だ円板状の弁体(3)を管路(1)の軸線
(L)と直交する2本の弁軸(3)の互いに対向する先端面
(3a)に設けた凹溝(4)内に嵌入させることによって回転
可能に支持し、弁体(2)を、弁軸(3)と連絡させたハン
ドルレバー(5)を操作することにより回動させて、管路
(1)を開閉させるようになっている。This butterfly valve (A) has an elliptical disc-shaped valve element (3) in an axial line of the conduit (1) in the conduit (1) for fluid flow.
Tip surfaces of two valve shafts (3) orthogonal to (L) facing each other
The valve body (2) is rotatably supported by being fitted into the groove (4) provided in (3a), and the valve body (2) is rotated by operating the handle lever (5) connected to the valve shaft (3). Moving the pipeline
It is designed to open and close (1).
【0004】このような排気シャッタ等に用いられるバ
タフライバルブ(A)においては、弁体(2)が閉止位置に
あるときの弁体(2)と管路(1)の内面との気密性を高め
ることが望ましく、気密性が悪いと、排気ブレーキ作動
時において大きな制動力が得られなくなる。In the butterfly valve (A) used for such an exhaust shutter, the airtightness between the valve body (2) and the inner surface of the conduit (1) when the valve body (2) is in the closed position is ensured. It is desirable to increase it, and if the airtightness is poor, a large braking force cannot be obtained when the exhaust brake operates.
【0005】そのため、従来は弁体(2)をプレス又は鋳
造により成形したのち、弁体(2)の管路(1)の内周面(1
a)と接する全外周面(2d)を、機械加工により曲面状に精
度良く切削し、管路(1)の内周面との気密性を高めるよ
うにしている。Therefore, conventionally, after the valve body (2) is formed by pressing or casting, the inner peripheral surface (1) of the conduit (1) of the valve body (2) is formed.
The entire outer peripheral surface (2d) in contact with a) is accurately machined into a curved surface by machining to enhance the airtightness with the inner peripheral surface of the conduit (1).
【0006】[0006]
【発明が解決しようとする課題】上述のように、弁体
(2)の外周面(2d)に機械加工を施すと、弁体(2)の製造
工程が増加して製造コストが上昇するとともに、バタフ
ライバルブ全体が高価となる問題点がある。DISCLOSURE OF THE INVENTION As described above, the valve body
When the outer peripheral surface (2d) of (2) is machined, the manufacturing process of the valve body (2) increases, the manufacturing cost rises, and the entire butterfly valve becomes expensive.
【0007】本発明は、上記問題点を解消すべくなされ
たもので、弁体に機械加工を施す必要がなく、簡単に製
造できるとともに、弁体閉止時における気密性を高める
ようにしたバタフライバルブを提供することを目的とす
るものである。The present invention has been made in order to solve the above-mentioned problems, and it is not necessary to machine the valve body, and the valve body can be easily manufactured and the airtightness is improved when the valve body is closed. It is intended to provide.
【0008】[0008]
【課題を解決するための手段】上記した目的を達成する
ために、本発明は、流体流通用の円形断面の管路内に収
容した概ねだ円形をなす弁体を管路の軸線と直交する弁
軸により回転可能に支持し、管路を開放する位置と、前
記管路の軸線に対し所要角度傾斜する閉止位置との間を
回転させるようにしたバタフライバルブにおいて、弁体
の閉止位置において、弁軸から互いに逆方向へ延出する
弁体の延出部における管路の内面に先に近接する側の面
の外周縁と、それに対向する管路の内接面との少なくと
もいずれか一方に、***部を形成したことを特徴とし、
上記した問題点の解消を図ったものである。In order to achieve the above-mentioned object, according to the present invention, a valve body having a substantially elliptical shape, which is housed in a conduit having a circular section for fluid flow, is orthogonal to the axis of the conduit. A butterfly valve, which is rotatably supported by a valve shaft, is configured to rotate between a position for opening a pipe and a closed position inclined by a required angle with respect to the axis of the pipe, in a closed position of a valve element, At least one of the outer peripheral edge of the surface of the extending portion of the valve body extending in the opposite direction from the valve shaft on the side closer to the inner surface of the conduit first and the inscribed surface of the conduit facing it. , Characterized by forming a ridge,
This is intended to solve the above problems.
【0009】[0009]
【作用】弁体の閉止時において弁体又は管路内周面のい
ずれかに形成した***部が、管路の内接面との間に形成
される隙間を閉塞するので、たとえ弁体の外周面の寸法
精度に誤差があっても、流体の漏れる恐れはなくなり、
気密性が高まる。When the valve body is closed, the ridge formed on either the valve body or the inner peripheral surface of the conduit closes the gap formed between the inner surface of the conduit and the inner surface of the conduit. Even if there is an error in the dimensional accuracy of the outer peripheral surface, there is no risk of fluid leakage,
Airtightness increases.
【0010】[0010]
【実施例】次に、本発明の一実施例を図1及び図2を参
照して説明する。なお、従来例で説明した部材と同一の
部材には、同一符号を付して、その詳細な説明は省略す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. The same members as those described in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.
【0011】本発明は、弁体(2)が図1の実線示のよう
に閉止位置回転させられた際において、弁軸(3)から互
いに逆方向へ延出する弁体(2)の延出部(2a)における管
路(1)の内周面(1a)に先に近接する側の各面(2b)の外周
縁(2c)が対向する管路(1)の内接面(1b)側に、外周縁(2
c)に沿う半円弧状の***部(6)を形成してある。According to the present invention, when the valve body (2) is rotated to the closed position as shown by the solid line in FIG. 1, the extension of the valve body (2) extending from the valve shaft (3) in the opposite directions to each other. The inner peripheral surface (1b) of the conduit (1) facing the inner peripheral surface (1a) of the conduit (1) at the outlet (2a) and the outer peripheral edge (2c) of each surface (2b) facing the inner peripheral surface (1a) first ) Side, the outer peripheral edge (2
A semi-circular ridge (6) is formed along c).
【0012】弁体(2)は、全体的に管路(1)の内周面(1
a)と所要の角度傾斜して接触可能なだ円形をなし、かつ
その外周面(2d)は、弁体(2)の両面(2b)に対し直角に形
成されている。なお、組付けにあたっては外周面(2d)と
管路(1)の内周面(1a)との間に、熱膨張分の隙間を設け
るようにしている。The valve body (2) generally has an inner peripheral surface (1
It has an oval shape that can contact with a) at a required angle, and its outer peripheral surface (2d) is formed at a right angle to both surfaces (2b) of the valve body (2). When assembling, a gap for thermal expansion is provided between the outer peripheral surface (2d) and the inner peripheral surface (1a) of the conduit (1).
【0013】***部(6)は、アルミナ等のセラミック粉
末や耐熱合金粉末等を、公知のプラズマ又はアセチレン
ガスを用いて溶射することにより、形成されている。す
なわち、弁体(2)を管路(1)に組付け、弁体(2)を閉止
位置に回転させた状態で、弁体(2)の外周縁(2c)と対向
する管路(1)の内接面(1b)に向って溶射を行なうか、又
は、弁体(2)の組付前に、管路(1)の内接面(1b)に予め
溶射を施すか、そのいずれでも***部(6)を形成するこ
とができる。なお、弁体(2)を組付けた状態で溶射する
際は、弁体(2)の外周縁(2c)をマスキングして行うのが
よく、このようにすると、弁体(2)が管路(1)に固着す
るのが防げる。The raised portion (6) is formed by spraying ceramic powder such as alumina or heat-resistant alloy powder using known plasma or acetylene gas. That is, with the valve body (2) assembled to the conduit (1) and the valve body (2) being rotated to the closed position, the conduit (1) facing the outer peripheral edge (2c) of the valve body (2). ) Of the inner surface (1b) of the pipe (1), or before assembling the valve body (2), the inner surface (1b) of the pipe (1) is sprayed in advance. However, the ridge (6) can be formed. When spraying the valve body (2) assembled, it is preferable to mask the outer peripheral edge (2c) of the valve body (2). Prevents sticking to the road (1).
【0014】上記のような***部(6)を形成すると、弁
体(2)の閉止時において、その外周縁(2c)が***部(6)
の側面に当接して管路(1)の内接面(1b)との間に形成さ
れる隙間が閉塞されるので、気密性は著しく高まる。When the raised portion (6) as described above is formed, the outer peripheral edge (2c) of the valve body (2) is closed when the valve body (2) is closed.
Since the gap formed by contacting the side surface of the pipe (1) and the inscribed surface (1b) of the pipe (1) is closed, the airtightness is significantly enhanced.
【0015】従って、弁体(2)をプレス加工により打ち
抜き成形したままの状態で使用し、その外周面(2d)の寸
法精度に若干の誤差が生じて、管路(1)の内接面(1b)と
の間に隙間が形成されたとしても、流路をほぼ完全に遮
断することができる。Therefore, when the valve body (2) is used in the state of being stamped and formed by press working, a slight error occurs in the dimensional accuracy of the outer peripheral surface (2d) of the valve body (2) and the inscribed surface of the pipe line (1). Even if a gap is formed between (1b), the flow path can be almost completely blocked.
【0016】その結果、従来のような機械加工工程を廃
止することができ、その分弁体(2)の製造が簡単となる
とともに、弁体(2)及びバタフライバルブの製造コスト
の低減に寄与することができる。As a result, it is possible to eliminate the conventional machining process, which simplifies the production of the valve body (2) and contributes to the reduction of the manufacturing cost of the valve body (2) and the butterfly valve. can do.
【0017】なお、上記実施例のように、***部(6)を
管路(1)の内側面に設けた場合は、閉弁時に、弁体(2)
の面(2b)が***部(6)に密接し、そのとき、弁体(2)の
外周面(2d)と管路(1)の内面との間に若干の間隙が形成
されるようにして、弁体(2)の熱膨張を逃がすようにす
ることができるという利点がある。When the raised portion (6) is provided on the inner surface of the conduit (1) as in the above embodiment, the valve body (2) is closed when the valve is closed.
The surface (2b) of the valve is in close contact with the ridge (6), and at that time, a slight gap is formed between the outer peripheral surface (2d) of the valve body (2) and the inner surface of the conduit (1). Therefore, there is an advantage that the thermal expansion of the valve body (2) can be released.
【0018】しかし、このような熱膨張を考慮する必要
がない常温の流体を制御するようなバタフライバルブに
おいては、***部(6)を弁体(2)側の面(2b)の外周縁に
設けたり、又は弁体(2)と管路(1)との両方に設けたり
してもよい。However, in a butterfly valve for controlling a fluid at room temperature that does not need to take thermal expansion into consideration, the raised portion (6) is provided on the outer peripheral edge of the surface (2b) on the valve body (2) side. It may be provided, or may be provided both in the valve body (2) and the conduit (1).
【0019】[0019]
【発明の効果】本発明によれば、弁体と管路の内周面と
のいずれかに形成した***部が、弁体の閉止時に形成さ
れる隙間を閉塞するので、従来のように、弁体の外周面
の寸法精度を機械加工により高める必要がなく、従って
弁体をプレス等により簡単に成形することができ、その
分弁体の製造が容易となるので、弁体及びバタフライバ
ルブ全体のコストの低減に寄与することができる。According to the present invention, the ridge formed on either the valve body or the inner peripheral surface of the conduit closes the gap formed when the valve body is closed. Since it is not necessary to improve the dimensional accuracy of the outer peripheral surface of the valve body by machining, the valve body can be easily molded by pressing etc., and the valve body can be easily manufactured accordingly, so the entire valve body and butterfly valve can be manufactured. It can contribute to the reduction of cost.
【図1】本発明の一実施例を示すバタフライバルブの縦
断面図である。FIG. 1 is a vertical cross-sectional view of a butterfly valve showing an embodiment of the present invention.
【図2】図1のB部分の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of portion B in FIG.
【図3】従来のバタフライバルブを示す一部切欠斜視図
である。FIG. 3 is a partially cutaway perspective view showing a conventional butterfly valve.
【図4】図3のIV−IV線に沿って見た縦断側面図であ
る。4 is a vertical sectional side view taken along line IV-IV in FIG.
(1)管路 (1a)内周面 (1b)内接面 (2)弁体 (2a)延出部 (2b)面 (2c)外周縁 (2d)外周面 (3)弁軸 (3a)先端面 (4)凹溝 (5)ハンド
ルレバー (6)***部 (A)バタフ
ライバルブ(1) Pipe (1a) Inner surface (1b) Inner surface (2) Valve body (2a) Extension (2b) Surface (2c) Outer peripheral edge (2d) Outer surface (3) Valve shaft (3a) Tip surface (4) Recessed groove (5) Handle lever (6) Raised part (A) Butterfly valve
Claims (2)
た概ねだ円形をなす弁体を管路の軸線と直交する弁軸に
より回転可能に支持し、管路を開放する位置と、前記管
路の軸線に対し所要角度傾斜する閉止位置との間を回転
させるようにしたバタフライバルブにおいて、 弁体の閉止位置において、弁軸から互いに逆方向へ延出
する弁体の延出部における管路の内面に先に近接する側
の面の外周縁と、それに対向する管路の内接面との少な
くともいずれか一方に、***部を設けたことを特徴とす
るバタフライバルブ。1. A position at which a valve body having a substantially oval shape housed in a conduit having a circular cross section for fluid flow is rotatably supported by a valve shaft orthogonal to an axis of the conduit and the conduit is opened, In a butterfly valve adapted to rotate between a closed position inclined by a required angle with respect to the axis of the pipe, in a closed position of the valve body, in an extension portion of the valve body extending in mutually opposite directions from the valve shaft. A butterfly valve, wherein a raised portion is provided on at least one of an outer peripheral edge of a surface that is closer to an inner surface of the conduit and an inner contact surface of the conduit that faces the inner peripheral surface of the conduit.
とする請求項1記載のバタフライバルブ。2. The butterfly valve according to claim 1, wherein the raised portion is formed by thermal spraying.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13806093A JPH06346761A (en) | 1993-06-10 | 1993-06-10 | Butterfly valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13806093A JPH06346761A (en) | 1993-06-10 | 1993-06-10 | Butterfly valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06346761A true JPH06346761A (en) | 1994-12-20 |
Family
ID=15213044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13806093A Pending JPH06346761A (en) | 1993-06-10 | 1993-06-10 | Butterfly valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06346761A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2786223A1 (en) * | 1998-11-25 | 2000-05-26 | Daimler Chrysler Ag | COMBUSTION ENGINE, IN PARTICULAR COMBUSTION ENGINE FOR MOTOR VEHICLES, EQUIPPED WITH EXHAUST GAS RECYCLING |
JP2021161925A (en) * | 2020-03-31 | 2021-10-11 | 日立Astemo株式会社 | Intake control device |
-
1993
- 1993-06-10 JP JP13806093A patent/JPH06346761A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2786223A1 (en) * | 1998-11-25 | 2000-05-26 | Daimler Chrysler Ag | COMBUSTION ENGINE, IN PARTICULAR COMBUSTION ENGINE FOR MOTOR VEHICLES, EQUIPPED WITH EXHAUST GAS RECYCLING |
US6295815B1 (en) | 1998-11-25 | 2001-10-02 | Daimlerchrysler Ag | Internal combustion engine with exhaust gas recirculation particularly for motor vehicles |
JP2021161925A (en) * | 2020-03-31 | 2021-10-11 | 日立Astemo株式会社 | Intake control device |
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