JPH07269376A - Butterfly valve - Google Patents

Butterfly valve

Info

Publication number
JPH07269376A
JPH07269376A JP6063296A JP6329694A JPH07269376A JP H07269376 A JPH07269376 A JP H07269376A JP 6063296 A JP6063296 A JP 6063296A JP 6329694 A JP6329694 A JP 6329694A JP H07269376 A JPH07269376 A JP H07269376A
Authority
JP
Japan
Prior art keywords
valve
seat portion
valve seat
butterfly valve
valve body
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
Application number
JP6063296A
Other languages
Japanese (ja)
Inventor
Nobuo Hara
信雄 原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Oozx Inc
Original Assignee
Fuji Oozx Inc
Fuji Valve Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Oozx Inc, Fuji Valve Co Ltd filed Critical Fuji Oozx Inc
Priority to JP6063296A priority Critical patent/JPH07269376A/en
Publication of JPH07269376A publication Critical patent/JPH07269376A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

PURPOSE:To make minimum the finish processing of the valve seat portion inner surface of a butterfly valve and reduce man-hours by projecting inward an annular valve seat portion having a flow passage direction width equivalent to at least the thickness of the outer periphery edge portion of a valve body, on the inner periphery surface of a body opposite to the outer periphery edge position of the valve body at the time of valve opening. CONSTITUTION:A butterfly valve 1 is applied to, for example, an exhaust shutter for exhaust brake, and a valve body 4 falls into a valve opening state by coming into contact with a valve seat portion 6 at a fixed inclination angle theta, in regard to the axis center of a body 2 and becomes fully opened in the state of being in parallel with the axis center. The valve seat portion 6 forms an annular shape that inclines at the same angle on the inner periphery surface of the body 2 opposite to the outer periphery edge position of the valve body 4 at the time of valve closing and a integrally cast by being projected a little inward, and the inner periphery surface is made to be a finish surface of high precision by cutting or grinding processing. As a portion that projects as the valve seat portion 6 in the body 2 forms an annular shape and its flow passage direction width is short, the range of finish processing necessary for contact with the valve body 4 is made minimum.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、例えば自動車用エンジ
ンの排気ガス流路に設けられる排気ブレーキ用排気シャ
ッタ等に適用される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 applied to, for example, an exhaust shutter for an exhaust brake provided in an exhaust gas passage of an automobile engine.

【0002】[0002]

【従来の技術】従来この種のバタフライバルブとして、
円筒状でその軸方向に沿う内部流路を有するボディ内
に、楕円をなす円板状の弁体を、前記内部流路と直交す
る軸回りに回動可能に支持した構成のものが知られてい
る。
2. Description of the Related Art Conventionally, as a butterfly valve of this type,
There is known a structure in which a disc-shaped valve body forming an ellipse is rotatably supported around an axis orthogonal to the internal flow passage in a cylindrical body having an internal flow passage extending in the axial direction thereof. ing.

【0003】このようなバタフライバルブのボディは、
一般に鋳造品によって構成されており、その内周面は、
弁閉時の流体の密閉性を高めるために、内周面全体を切
削または研摩等の機械加工によって高精度に仕上げられ
ている。
The body of such a butterfly valve is
It is generally made of cast products, and its inner peripheral surface is
In order to improve the fluid tightness when the valve is closed, the entire inner peripheral surface is finished with high precision by machining such as cutting or polishing.

【0004】[0004]

【発明が解決しようとする課題】上述した従来のバタフ
ライバルブにおいては、ボディの内周面全体に高精度の
仕上げ加工が施されているため、切削または研摩等に要
する工数が多く掛かって生産性が低下するとともに、切
削工具や砥石の消耗等を招き、経済的無駄が生じてい
た。
In the above-mentioned conventional butterfly valve, since the entire inner peripheral surface of the body is subjected to high-precision finishing, a large number of man-hours are required for cutting or polishing and the productivity is increased. And the consumption of cutting tools and grindstones, etc., resulting in economical waste.

【0005】本発明は、このような事情に鑑みてなされ
たもので、ボディ内面の仕上げ加工を最小限として、製
作時の工数を低減し、安価に製造しうるようにしたバタ
フライバルブを提供することを目的とする。
The present invention has been made in view of the above circumstances, and provides a butterfly valve in which the finishing work on the inner surface of the body is minimized, the number of man-hours at the time of manufacturing is reduced, and the manufacturing is inexpensive. The purpose is to

【0006】[0006]

【課題を解決するための手段】前記の目的を達成するた
めに、本発明は、円筒状の内部流路を有するボディ内
に、前記内部流路と直交する軸回りに回動可能に支持さ
れた円板状の弁体を収容してなるバタフライバルブにお
いて、弁閉時における前記弁体の外周縁位置に対応する
前記ボディの内周面に、少なくとも前記弁体の外周縁部
の肉厚に相当する流路方向幅を有する環状の弁座部を、
前記ボディ内方に突出させて形成したことを特徴とする
ものである。
In order to achieve the above-mentioned object, the present invention is supported in a body having a cylindrical internal flow passage so as to be rotatable about an axis orthogonal to the internal flow passage. In a butterfly valve containing a disc-shaped valve body, the inner peripheral surface of the body corresponding to the outer peripheral edge position of the valve body when the valve is closed, at least the wall thickness of the outer peripheral edge portion of the valve body. An annular valve seat portion having a corresponding flow direction width,
It is characterized in that it is formed so as to project inward of the body.

【0007】なお、本発明において、望ましくはボディ
を鋳造により形成し、弁座部の内周面を切削または研摩
加工によって高精度の仕上面とするのがよい(請求項
2)。また、望ましくは、ボディが、塑性加工により内
方に突出させた弁座部を有するパイプよりなり、かつ弁
座部の内周面を、切削または研摩加工により高精度の仕
上面とするのがよい(請求項3)。
In the present invention, preferably, the body is preferably formed by casting, and the inner peripheral surface of the valve seat portion is cut or polished to provide a highly accurate finished surface (claim 2). Further, it is desirable that the body is made of a pipe having a valve seat portion that is projected inward by plastic working, and that the inner peripheral surface of the valve seat portion is a highly accurate finished surface by cutting or polishing. Good (Claim 3).

【0008】[0008]

【作用】上述した構成によれば、ボディ内に弁座部とし
て突出する部分が環状をなして流路方向幅の短いものと
されていることから、弁体との接触に必要な仕上加工の
範囲が従来に比して極めて少なくて済む。
According to the above-mentioned structure, since the portion projecting as the valve seat portion in the body is annular and has a short width in the flow passage direction, the finishing work required for contact with the valve body can be achieved. The range is extremely small compared with the conventional one.

【0009】[0009]

【実施例】以下、本発明の一実施例を図面を参照して説
明する。図1は、バタフライバルブのボディ中央部にお
ける縦断面図、図2は、バタフライバルブ全体の一部切
欠分解斜視図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a central portion of a butterfly valve body, and FIG. 2 is a partially cutaway exploded perspective view of the entire butterfly valve.

【0010】本実施例のバタフライバルブ(1)は、円筒
状の鋳造品によって構成され、軸方向(a)に沿う内部流
路(2a)を有するボディ(2)と、このボディ(2)内に内部
流路(2a)と直交する軸(3)を介して回動可能に支持され
た楕円円板状の弁体(4)とを備えている。
The butterfly valve (1) of this embodiment is composed of a cylindrical cast product and has a body (2) having an internal flow path (2a) along the axial direction (a), and the inside of this body (2). And an elliptical disk-shaped valve body (4) rotatably supported via an axis (3) orthogonal to the internal flow path (2a).

【0011】このバタフライバルブ(1)は、例えば自動
車用エンジンの排気管(5)に接続され、排気ブレーキ用
排気シャッタとして適用される。
The butterfly valve (1) is connected to an exhaust pipe (5) of an automobile engine, for example, and is used as an exhaust shutter for an exhaust brake.

【0012】弁体(4)は、ボディ(2)の軸心に対し、一
定の傾斜角度(θ)で弁座部(6)に接触することにより、
弁閉状態となるよう設定され(図1の実線の状態)、ま
たボディ(2)の軸心と平行な状態(図1の想像線の状
態)で全開となるよう設定されている。
The valve body (4) contacts the valve seat (6) at a constant inclination angle (θ) with respect to the axis of the body (2),
The valve is set to be in a closed state (solid line in FIG. 1) and fully open in a state parallel to the axis of the body (2) (imaginary line in FIG. 1).

【0013】このものにおいて、弁座部(6)は弁閉時に
おける弁体(4)の外周縁位置に対応するボディ(2)の内
周面に、前記角度(θ)と同一の角度で傾斜する環状をな
して形成され、かつボディ(2)の内方に若干突出させて
一体鋳造されている。そして、この弁座部(6)の流路方
向に沿う寸法(b)は、弁体(4)の外周縁部の肉厚よりも
若干大きい程度に設定され、この弁座部(6)の内周面(6
a)は、切削または研摩加工によって高精度の仕上面とさ
れている。
In this structure, the valve seat portion (6) is formed on the inner peripheral surface of the body (2) corresponding to the outer peripheral edge position of the valve body (4) when the valve is closed, at the same angle as the angle (θ). It is formed in a slanting annular shape, and is integrally cast by slightly projecting inward of the body (2). The dimension (b) of the valve seat portion (6) along the flow path direction is set to be slightly larger than the wall thickness of the outer peripheral edge portion of the valve body (4). Inner surface (6
In a), the finished surface has high precision by cutting or polishing.

【0014】バルブ使用時においては、図示しない駆動
機構によって弁体(4)の軸(3)が所定角度その軸(3)の
軸回りに回動され(図1の矢印(c)参照)、前述したよ
うに弁体(4)が弁座部(6)へ接触することにより弁閉と
なり、角度(θ)が零となる回動状態で弁全開となる。
When the valve is used, the shaft (3) of the valve body (4) is rotated about the shaft (3) by a predetermined angle by a drive mechanism (not shown) (see arrow (c) in FIG. 1). As described above, the valve body (4) is brought into contact with the valve seat portion (6) to close the valve, and the valve is fully opened when the angle (θ) becomes zero.

【0015】このように構成された本実施例のバタフラ
イバルブ(1)によると、ボディ(2)内に弁座部(6)とし
て突出する部分が環状をなして流路方向幅の短いものと
されていることから、弁体(4)との接触に必要な仕上加
工の範囲が従来に比して極めて少なくて済む。例えばこ
の仕上加工を切削工具による切削で行う場合には、工具
の持ちがよくなり、また研摩で行う場合には砥石の持ち
がよくなり、これら製作工具の消耗の低減による大きい
経済的効果が得られる。また、加工範囲の縮小によって
作業能率が向上し、生産性が高まることから製品コスト
の低減にもつながる。
According to the butterfly valve (1) of this embodiment constructed as described above, the portion projecting as the valve seat portion (6) in the body (2) is annular and has a short width in the flow path direction. Therefore, the range of finishing required for contact with the valve body (4) is extremely small compared with the conventional case. For example, when this finishing process is performed by cutting with a cutting tool, the holding of the tool is improved, and when it is performed by polishing, the holding of the grindstone is improved. To be Further, the work efficiency is improved by the reduction of the processing range and the productivity is increased, which leads to the reduction of the product cost.

【0016】図3は、本発明の他の実施例(請求項3記
載の発明の実施例)を示すもので、この実施例では、ボ
ディ(2)をパイプにより形成し、その外周面の一部を塑
性加工(絞り加工)により縮径させて内方に若干突出させ
ることにより、弁座部(6)を形成したものである。
FIG. 3 shows another embodiment of the present invention (an embodiment of the invention described in claim 3). In this embodiment, the body (2) is formed of a pipe and one of its outer peripheral surface is formed. The valve seat portion (6) is formed by reducing the diameter of the portion by plastic working (drawing) and slightly projecting it inward.

【0017】弁座部(6)の内周面は、上述したと同様、
切削又は研摩加工によって高精度の仕上面としてある。
この実施例によると、上述の鋳造により形成されたもの
に比して、製造工程を著しく簡略化しうる利点がある。
なお、本発明の弁座部(6)の寸法(b)は、必ずしも前記
実施例と同一である必要はなく、弁体(4)の外周縁部の
肉厚とほぼ同等の寸法であってもよい。
The inner peripheral surface of the valve seat portion (6) is the same as described above.
It has a high-precision finished surface by cutting or polishing.
According to this embodiment, there is an advantage that the manufacturing process can be remarkably simplified as compared with the one formed by the above-mentioned casting.
The dimension (b) of the valve seat portion (6) of the present invention does not necessarily have to be the same as that of the above-mentioned embodiment, and is approximately the same as the wall thickness of the outer peripheral edge portion of the valve body (4). Good.

【0018】[0018]

【発明の効果】以上の実施例で詳述したように、請求項
1〜3記載の発明によれば、ボディと一体をなす弁座部
の寸法を最小限としてボディ内面の仕上げ加工を低減で
きるようにしたことにより、製造工数が低減して生産性
が向上し、安価なバタフライバルブを提供しうる。特
に、請求項3の発明によると、製造工程が簡略化される
ので、より安価なバタフライバルブが得られる。
As described in detail in the above embodiments, according to the inventions of claims 1 to 3, the size of the valve seat portion integrated with the body can be minimized to reduce the finishing work on the inner surface of the body. By doing so, the number of manufacturing steps can be reduced, the productivity can be improved, and an inexpensive butterfly valve can be provided. Particularly, according to the invention of claim 3, since the manufacturing process is simplified, a cheaper butterfly valve can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るバタフライバルブの一実施例を示
す要部の断面図である。
FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a butterfly valve according to the present invention.

【図2】同実施例の全体構成を示す一部切欠分解斜視図
である。
FIG. 2 is a partially cutaway exploded perspective view showing the overall configuration of the embodiment.

【図3】本発明の他の実施例を示す縦断面図である。FIG. 3 is a vertical sectional view showing another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

(1)バタフライバルブ (2)ボディ (3)軸 (4)弁体 (6)弁座部 (6a)内周面 (1) Butterfly valve (2) Body (3) Shaft (4) Valve body (6) Valve seat (6a) Inner peripheral surface

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 円筒状の内部流路を有するボディ内に、
前記内部流路と直交する軸回りに回動可能に支持された
円板状の弁体を収容してなるバタフライバルブにおい
て、弁閉時における前記弁体の外周縁位置に対応する前
記ボディの内周面に、少なくとも前記弁体の外周縁部の
肉厚に相当する流路方向幅を有する環状の弁座部を、前
記ボディ内方に突出させて形成したことを特徴とするバ
タフライバルブ。
1. A body having a cylindrical internal flow path,
A butterfly valve comprising a disc-shaped valve body rotatably supported about an axis orthogonal to the internal flow path, the butterfly valve having an inner peripheral portion of the body corresponding to an outer peripheral edge position of the valve body when the valve is closed. A butterfly valve, characterized in that an annular valve seat portion having a width in the flow passage direction corresponding to at least the thickness of the outer peripheral edge portion of the valve body is formed on the peripheral surface so as to project inward of the body.
【請求項2】 ボディが鋳造により形成され、弁座部の
内周面を、切削または研摩加工により高精度の仕上面と
したことを特徴とする請求項1記載のバタフライバル
ブ。
2. The butterfly valve according to claim 1, wherein the body is formed by casting, and the inner peripheral surface of the valve seat portion has a highly accurate finished surface by cutting or polishing.
【請求項3】 ボディが、塑性加工により内方に突出さ
せた弁座部を有するパイプよりなり、かつ弁座部の内周
面を、切削または研摩加工により高精度の仕上面とした
ことを特徴とする請求項1記載のバタフライバルブ。
3. The body is made of a pipe having a valve seat portion that is projected inward by plastic working, and the inner peripheral surface of the valve seat portion is a highly accurate finished surface by cutting or polishing. The butterfly valve according to claim 1, which is characterized in that.
JP6063296A 1994-03-31 1994-03-31 Butterfly valve Pending JPH07269376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6063296A JPH07269376A (en) 1994-03-31 1994-03-31 Butterfly valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6063296A JPH07269376A (en) 1994-03-31 1994-03-31 Butterfly valve

Publications (1)

Publication Number Publication Date
JPH07269376A true JPH07269376A (en) 1995-10-17

Family

ID=13225219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6063296A Pending JPH07269376A (en) 1994-03-31 1994-03-31 Butterfly valve

Country Status (1)

Country Link
JP (1) JPH07269376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7047936B2 (en) 2003-11-25 2006-05-23 Aisan Kogyo Kabushiki Kaisha Throttle bodies and methods of manufacturing such throttle bodies
KR101402265B1 (en) * 2006-08-14 2014-06-02 보르그워너 인코퍼레이티드 Low force anti sticking throttle valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7047936B2 (en) 2003-11-25 2006-05-23 Aisan Kogyo Kabushiki Kaisha Throttle bodies and methods of manufacturing such throttle bodies
KR101402265B1 (en) * 2006-08-14 2014-06-02 보르그워너 인코퍼레이티드 Low force anti sticking throttle valve

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