JPH0155708B2 - - Google Patents
Info
- Publication number
- JPH0155708B2 JPH0155708B2 JP11232382A JP11232382A JPH0155708B2 JP H0155708 B2 JPH0155708 B2 JP H0155708B2 JP 11232382 A JP11232382 A JP 11232382A JP 11232382 A JP11232382 A JP 11232382A JP H0155708 B2 JPH0155708 B2 JP H0155708B2
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve
- stem
- seat surface
- inlet
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Description
【発明の詳細な説明】
本発明は、一般機器の流体回路中に配設され、
弁体を回動させることにより回路中の流量を制御
するバタフライ弁の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention is arranged in a fluid circuit of general equipment,
This invention relates to improvements in butterfly valves that control the flow rate in a circuit by rotating a valve body.
一般に、バタフライ弁は、構造が簡単で、流量
調整の特性が良く、然も小型軽量で安価に製造で
きると云う、等の多くの利点を有しているので流
量制御用に広く利用されて居り、特に、近年にあ
つては耐蝕性・耐磨耗性等にも優れたセラミツク
製のバタフライ弁が開発されている。 In general, butterfly valves are widely used for flow control because they have many advantages such as simple structure, good flow rate adjustment characteristics, small size, light weight, and can be manufactured at low cost. In particular, in recent years, ceramic butterfly valves have been developed which have excellent corrosion resistance and abrasion resistance.
この種のバタフライ弁１００は、第７図及び第
８図に示す如く、セラミツク部材で作製された円
筒状の弁箱１０１と、これに内装されたセラミツ
ク部材で作製された円板状の弁体１０２と、弁箱
１０１に支架され弁体１０２を回転操作しうる金
属製の弁棒１０３とからその主要部が構成されて
居り、一般に前記弁体１０２と弁棒１０３とは、
組立・製造等の都合上、夫々別個に作製され、後
で結合される様になつている。即ち、弁体１０２
と弁棒１０３は、弁棒１０３下端部を弁体１０２
の上方部に形成した凹所１０２ａに挿入し、該凹
所１０２ａと弁棒１０３下端部との間に接着剤Ａ
を充填することにより結合される。 As shown in FIGS. 7 and 8, this type of butterfly valve 100 includes a cylindrical valve body 101 made of a ceramic member, and a disc-shaped valve body made of a ceramic member housed inside the cylindrical valve body 101. 102, and a metal valve stem 103 supported by the valve body 101 and capable of rotating the valve body 102. Generally, the valve body 102 and the valve stem 103 are:
For convenience of assembly and manufacturing, they are manufactured separately and then combined later. That is, the valve body 102
and the valve stem 103 connects the lower end of the valve stem 103 to the valve body 102.
The adhesive A is inserted into the recess 102a formed in the upper part, and the adhesive A is inserted between the recess 102a and the lower end of the valve stem 103.
are combined by filling.
然し乍ら、このバタフライ弁１００は、弁体１
０２が閉弁されている時に流体圧により弁体１０
２のみが下流側へ押し込まれて弁体１０２と弁棒
１０３の結合部分に剪断応力が作用する。その結
果、前記結合部分が損傷し易い。とりわけ、比較
的肉厚の薄い弁体の凹所１０２ａの回に部分が破
損し易いと云う難点がある。 However, this butterfly valve 100 has a valve body 1
02 is closed, the valve body 10 is closed by fluid pressure.
2 is pushed downstream, and shear stress is applied to the joint between the valve body 102 and the valve stem 103. As a result, the connecting portion is easily damaged. In particular, there is a problem in that the recess 102a of the valve body, which has a relatively thin wall, is easily damaged.
又、弁体１０２が閉弁から開弁する時に弁体１
０２と弁棒１０３の結合部分に大きなトルクが掛
り、前記と同様の事が起り得る。 Also, when the valve body 102 opens from the closed state, the valve body 1
A large torque is applied to the joint between the valve stem 103 and the valve stem 103, and the same situation as described above may occur.
更に、弁体１０２の閉弁時若しくは弁体１０２
が閉弁から開弁する時に流体圧が作用した場合、
弁体１０２と弁棒１０３の結合部分が正規の結合
状態から偏位する事がある。この場合には、良好
なシール性を確保することが困難であり、然も開
弁し難い場合がある。 Furthermore, when the valve body 102 is closed or when the valve body 102
If fluid pressure is applied when the valve opens from closed,
The joint portion between the valve body 102 and the valve stem 103 may deviate from the normal joint state. In this case, it is difficult to ensure good sealing performance, and it may also be difficult to open the valve.
前記各難点は、特に高圧流体を取り扱う場合、
顕著に現れる。 Each of the above-mentioned difficulties is particularly important when handling high-pressure fluids.
noticeable.
一方、弁体と弁棒を別個に作製した金属製のバ
タフライ弁にあつても、上記と同様の欠点が内存
する。 On the other hand, even metal butterfly valves in which the valve body and valve stem are made separately have the same drawbacks as described above.
本発明は、上記の各難点を解消する為に創案さ
れたものであり、その目的は弁体と弁棒の結合部
分に於ける弁体側の破損を防止すると共に、弁体
と弁棒の組立を簡略化でき、且つ弁体を弁棒の結
合状態に拘わらずシール性を向上でき、然も高圧
流体が作用しても開閉弁作用に支障を来さず、そ
の上、弁箱を一体として部品点数を削減すると共
に、弁体と弁箱の組立・分解が容易に行えるバタ
フライ弁を提供するにある。 The present invention was devised to solve the above-mentioned problems, and its purpose is to prevent damage to the valve body at the joint between the valve body and the valve stem, and to improve the assembly of the valve body and the valve stem. It is possible to simplify the valve body and improve the sealing performance regardless of the connection state of the valve stem, and even when high-pressure fluid is applied, there is no problem with the opening/closing valve operation.In addition, the valve body can be integrated into one To provide a butterfly valve in which the number of parts is reduced and the valve body and valve box can be easily assembled and disassembled.
本発明の基本的な構成は、平板部とこれの上下
に連設された上方傘部及び下方傘部とを備えた弁
体と、平板部の両側外周面並びに上方・下方傘部
の外周面を凸球面とした弁体シート面と、弁体の
上方傘部に穿設された廻り止め凹所と、入口・出
口及び弁棒挿入穴を備え一体的に形成された円筒
状の弁箱と、弁箱に形成されて弁体シート面に適
合する弁箱シート面と、弁箱の弁棒挿入穴に支架
されて弁体を回転操作しうる弁棒と、弁棒の下端
部に形成されて上方傘部の凹所に嵌合しうる廻り
止め部とから成り、前記弁箱の入口及び出口を横
長の略小判型に形成し、入口の両側に形成された
円弧状の内周面間の内径寸法を出口側よりも大き
くすると共に、弁体の直径以上とし、入口の上下
に形成された平面状の内面間の内径寸法を弁体の
最大厚さ以上とした事に特徴が存する。 The basic structure of the present invention includes a valve body including a flat plate part, an upper umbrella part and a lower umbrella part connected above and below the valve body, outer circumferential surfaces on both sides of the flat plate part, and outer circumferential surfaces of the upper and lower umbrella parts. A valve body seat surface with a convex spherical surface, a rotation prevention recess drilled in the upper umbrella part of the valve body, and an integrally formed cylindrical valve body equipped with an inlet, an outlet, and a valve stem insertion hole. , a valve body seat surface formed on the valve body and adapted to the valve body seat surface, a valve stem that is supported in the valve stem insertion hole of the valve body and can rotate the valve body, and a valve stem formed on the lower end of the valve stem. and a rotation stopper that can fit into the recess of the upper umbrella part. It is characterized in that the inner diameter of the valve body is larger than that of the outlet side and is greater than the diameter of the valve body, and the inner diameter between the planar inner surfaces formed above and below the inlet is greater than or equal to the maximum thickness of the valve body.
開弁状態から弁棒を回転させるとこれに伴つて
弁体が回転し、平板部の弁体シート面は弁箱の弁
箱シート面に当座して閉弁状態になる。このと
き、弁体は弁箱シート面で支持されて居り、且つ
弁体シート面と弁箱シート面は面接触している。
又、閉弁状態から弁棒を回転させるとこれに伴つ
て弁体が回転し、平板部の弁体シート面が弁箱シ
ート面から離座して開弁状態になる。このとき、
弁体の上方傘部及び下方傘部は弁箱シート面に支
持されている。 When the valve stem is rotated from the valve open state, the valve body rotates accordingly, and the valve body seat surface of the flat plate portion rests on the valve body seat surface of the valve box, thereby bringing the valve into the closed state. At this time, the valve body is supported by the valve body seat surface, and the valve body seat surface and the valve body seat surface are in surface contact.
Further, when the valve stem is rotated from the closed state, the valve body rotates accordingly, and the valve body seat surface of the flat plate portion is separated from the valve body seat surface, resulting in the valve open state. At this time,
The upper umbrella part and the lower umbrella part of the valve body are supported by the valve box seat surface.
一方、弁体を、その平板部の弁体シート面が弁
箱入口の両側内周面と対向する水平状態でもつて
該入口から挿入し、該弁体をこれの廻り止め凹所
が弁棒挿入穴に対向する様に90度回転させると、
弁体シート面と弁箱シート面とが適合し、両者は
組立られる。又、前記と逆の動作を行えば弁体と
弁箱を簡単に分解することができる。 On the other hand, insert the valve body from the inlet with the valve body seat surface of the flat plate portion facing the inner circumferential surfaces on both sides of the valve body inlet, and insert the valve body from the inlet so that the rotation prevention recess of the valve body is inserted into the valve stem. If you rotate it 90 degrees so that it faces the hole,
The valve body seat surface and the valve body seat surface are matched, and both are assembled. Further, by performing the operation in reverse to the above, the valve body and valve box can be easily disassembled.
本発明では、下記の利点を有する。 The present invention has the following advantages.
(1) 開弁時には弁体が弁箱シート面で支持されて
居り、然も弁体の廻り止め凹所の周囲部分の肉
厚を厚くした為、流体圧が作用して廻り止め凹
所の周囲部分に剪断応力が作用してもこの部分
が破損することはない。(1) When the valve is opened, the valve body is supported by the seat surface of the valve body, and since the wall around the rotation prevention recess of the valve body is made thicker, fluid pressure acts on the rotation prevention recess. Even if shear stress is applied to the surrounding area, this area will not be damaged.
(2) 弁体の廻り止め凹所の周囲部分の肉厚を厚く
した為、弁体が閉弁から開弁する時に流体圧の
作用により廻り止め凹所の周囲部分に大きなト
ルクが掛つても弁体が破損することはない。(2) The wall around the detent recess of the valve body has been made thicker, so even when a large torque is applied to the area around the detent recess due to fluid pressure when the valve body is opened from closed, it will not work. The valve body will not be damaged.
(3) 弁体の廻り止め凹所に弁棒の廻り止め部を嵌
合するだけで弁体の回転操作を行える構成とし
た為、従来のバタフライ弁に比較して弁体と弁
棒の組立を簡略化できる。(3) Because the valve body can be rotated simply by fitting the rotation stopper part of the valve stem into the rotation prevention recess of the valve body, the assembly of the valve body and valve stem is easier than with conventional butterfly valves. can be simplified.
(4) 弁体シート面と弁箱シート面は面接触になつ
て居り、然も開弁時には流体圧により弁体が下
流側へ押圧される為、これらシート面の密合を
確実且つ良好に行える。又、弁体は弁箱シート
面で支持されている為、弁体と弁棒の嵌合状態
に拘わらず弁体を常に正常な状態で弁箱シート
面に密合させることができる。その結果、従来
のバタフライ弁に比較してシール性能が極めて
優れている。(4) The valve body seat surface and the valve body seat surface are in surface contact, and since the valve body is pressed downstream by fluid pressure when the valve is opened, the tightness of these seat surfaces is ensured and good. I can do it. Further, since the valve body is supported by the valve body seat surface, the valve body can always be brought into close contact with the valve body seat surface in a normal state regardless of the fitted state of the valve body and the valve stem. As a result, the sealing performance is extremely superior compared to conventional butterfly valves.
(5) 従来の弁に比較して、弁棒には、回転トルだ
けがかかり、弁箱に押し付けられる力がなく、
弁箱と弁棒の摩耗がない。(5) Compared to conventional valves, only the rotating torque is applied to the valve stem, and there is no force pressing against the valve body.
There is no wear on the valve body and valve stem.
(6) 弁箱を一体的に形成した為に、従来の様に複
数の部品で弁箱を形成したバタフライ弁に比較
して部品点数を削減できる。又、弁箱にシール
部材を使用せずに当該弁箱シート性を向上する
ことができる。(6) Since the valve box is integrally formed, the number of parts can be reduced compared to conventional butterfly valves in which the valve box is formed from multiple parts. Moreover, the seatability of the valve box can be improved without using a sealing member in the valve box.
(7) 弁体を一体的に形成された弁箱の入口から挿
入して弁箱シート面に適合できる構成とした
為、弁体と弁箱の組立を簡単に行える。又、補
修・点検に際しても弁体と弁箱の分解を簡単に
行え、至極便利である。(7) The valve body can be inserted through the entrance of the integrally formed valve body and adapted to the valve body seat surface, making assembly of the valve body and valve body easy. Furthermore, the valve body and valve box can be easily disassembled for repair and inspection, which is extremely convenient.
(8) 弁体には、上下方向のスラスト力がかからな
い。(8) No vertical thrust force is applied to the valve body.
弁棒にかかるスラスト力は外部で受ける為、
スラリー等によるベアリングシートの摩耗がな
く、材質も制限されない。 The thrust force applied to the valve stem is received externally, so
There is no wear of the bearing seat due to slurry, etc., and there are no restrictions on the material.
(9) 弁箱とシート面があるので、シート面に、特
別なシール材をはる必要がなく（例えばゴム
材）、構造が簡単でコストが低下する。(9) Since there is a valve box and a seat surface, there is no need to apply a special sealing material (for example, rubber material) to the seat surface, resulting in a simple structure and reduced costs.
以下、本発明の実施例を図面に基づいて詳細に
説明する。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
バタフライ弁１は、第１図乃至第３図に示す如
く、平板部２ａと上方傘部２ｂ及び下方傘部２ｃ
とを備えた弁体２と、これらの外周面を凸球面と
した弁体シート面２a′，２b′，２c′と、弁体２の
上方傘部２ｂに穿設された廻り止め凹所２ｄと、
弁棒挿入穴４と入口５及び出口６を備えた弁箱３
と、弁箱３に形成されて弁体シート面２a′，２
b′，２c′に適合する弁箱シート面３ａ，３ｂ，３
ｃと、弁棒挿入穴４に支架されて弁体２を回転操
作みうる弁棒７と、弁棒７の下端部に形成されて
弁体２の廻り止め凹所２ｄに嵌合しうる廻り止め
７ａとからその主要部が構成されている。 As shown in FIGS. 1 to 3, the butterfly valve 1 includes a flat plate portion 2a, an upper umbrella portion 2b, and a lower umbrella portion 2c.
a valve body 2 having a valve body 2, valve body seat surfaces 2a', 2b', 2c' whose outer peripheral surfaces are convex spherical surfaces, and a rotation preventing recess 2d bored in an upper umbrella part 2b of the valve body 2. and,
Valve box 3 equipped with a valve stem insertion hole 4, an inlet 5 and an outlet 6
are formed on the valve body 3 and the valve body seat surfaces 2a', 2
Valve box seat surfaces 3a, 3b, 3 compatible with b', 2c'
c, a valve stem 7 that is supported in the valve stem insertion hole 4 so that the valve body 2 can be rotated, and a rotation that is formed at the lower end of the valve stem 7 and that can fit into the anti-rotation recess 2d of the valve body 2. The main part is composed of the stop 7a.
具体的には、前記弁体２は、平板部２ａとこれ
の上下に連結された上方傘部２ｂ及び下方傘部２
ｃとを備えて居り、これらはセラミツク部材によ
り一体的に作製されている。又、平板部２ａの両
側外周面並びに上方傘部２ｂ及び下方傘部２ｃの
外周面は凸球面に形成されて弁体シート面２a′，
２b′，２c′となつて居り、各弁体シート面２a′，
２b′，２c′は同一の曲率半径に設定されている。
従つて、この弁体２は球体の両側部が削り取られ
た形状を呈している。更に、上方傘部２ｂの弁体
シート面２a′には直方形状の廻り止め凹所２ｄが
穿設されている。 Specifically, the valve body 2 includes a flat plate portion 2a, an upper umbrella portion 2b and a lower umbrella portion 2 connected above and below the flat plate portion 2a.
c, which are integrally made of ceramic material. Further, the outer circumferential surfaces on both sides of the flat plate portion 2a and the outer circumferential surfaces of the upper umbrella portion 2b and the lower umbrella portion 2c are formed into convex spherical surfaces, and the valve body seat surfaces 2a',
2b', 2c', and each valve body seat surface 2a',
2b' and 2c' are set to have the same radius of curvature.
Therefore, this valve body 2 has a shape in which both sides of a spherical body are shaved off. Furthermore, a rectangular anti-rotation recess 2d is bored in the valve element seat surface 2a' of the upper umbrella portion 2b.
弁箱３は、弁棒挿入穴４と入口５及び出口６を
備えた円筒状を呈し、セラミツク部材により一体
的に形成されている。 The valve box 3 has a cylindrical shape with a valve stem insertion hole 4, an inlet 5, and an outlet 6, and is integrally formed of a ceramic member.
又、弁箱３の内周面中間部には弁体２の弁体シ
ート面２a′，２b′，２c′に適合すると共に、弁体
２を内装支持しうる弁箱シート面３ａ，３ｂ，３
ｃが形成されている。即ち、弁箱３の内周面上に
は弁体２の上方傘部２ｂ及び下方傘部２ｃの弁体
シート面２b′，２c′に適合つまり弁体シート面２
b′，２c′と同一の曲率半径を有する凹球面の弁箱
シート面３ｂ，３ｃが、また、弁箱３の内面両側
には弁体２の平板部２ａの弁体シート面２a′に適
合つまり弁体シート面２a′と同一の曲率半径を有
する凹球面の弁箱シート３ａが夫々形成されてい
る。 Further, in the middle part of the inner peripheral surface of the valve body 3, there are valve body seat surfaces 3a, 3b, which can fit the valve body seat surfaces 2a', 2b', 2c' of the valve body 2, and can internally support the valve body 2. 3
c is formed. That is, on the inner circumferential surface of the valve body 3, there is a valve body seat surface 2 that fits the valve body seat surfaces 2b' and 2c' of the upper umbrella part 2b and the lower umbrella part 2c of the valve body 2.
Concave spherical valve body seat surfaces 3b and 3c having the same radius of curvature as b' and 2c' are fitted to the valve body seat surface 2a' of the flat plate portion 2a of the valve body 2 on both sides of the inner surface of the valve body 3. That is, the valve body seats 3a each have a concave spherical surface having the same radius of curvature as the valve body seat surface 2a'.
更に、弁箱３の入口５及び出口６は横長の略少
小判型に形成されている。 Furthermore, the inlet 5 and outlet 6 of the valve box 3 are formed into a horizontally long, substantially oval shape.
具体的には、入口５及び出口６は、その両側に
形成された円弧状の内周面５ａ，６ａと上下に形
成されて内周面５ａ，６ａと連続する平面状の内
面５ｂ，６ｂとを備えて居り、入口５の円弧状の
内周面５ａ間の内径寸法D1は、出口６側の内径
寸法D2よりも大きく、且つ弁体２の直径D3以上
に設定されている。又、入口５の平面状の内面５
ｂ間の内径寸法D4は、弁体２の最大厚さこの実
施例では上方傘部２ｂの厚さD5以上で、且つ弁
体２の直径D3以下に設定されて居り、出口６の
平面状の内面６ｂ間の内径寸法D6と同一に設定
されている。 Specifically, the inlet 5 and the outlet 6 have arcuate inner circumferential surfaces 5a, 6a formed on both sides thereof, and planar inner surfaces 5b, 6b formed above and below and continuous with the inner circumferential surfaces 5a, 6a. The inner diameter dimension D 1 between the arcuate inner circumferential surfaces 5 a of the inlet 5 is larger than the inner diameter dimension D 2 on the outlet 6 side, and is set to be greater than or equal to the diameter D 3 of the valve body 2 . Moreover, the planar inner surface 5 of the entrance 5
The inner diameter dimension D 4 between b is set to be greater than the maximum thickness of the valve body 2, which is the thickness D 5 of the upper umbrella portion 2b in this embodiment, and less than the diameter D 3 of the valve body 2, and the inner diameter dimension D 4 of the outlet 6 The inner diameter dimension D6 between the planar inner surfaces 6b is set to be the same.
尚、８は弁箱３を固定保持する締付具であつ
て、スタンド部８ｂを備えた半円弧状の上部カバ
ー８ａと、同じく半円弧状の下部カバー８ｃと、
両カバー８ａ，８ｂを締結するボルト・ナツト８
ｄとから構成されている。 Reference numeral 8 denotes a fastener for fixing the valve box 3, which includes a semicircular arc-shaped upper cover 8a having a stand portion 8b, and a semicircular arc-shaped lower cover 8c.
Bolts and nuts 8 that fasten both covers 8a and 8b
It is composed of d.
一方、弁箱３の弁棒挿入穴４には、弁体２を回
転操作しうる金属製の弁棒７が上部カバー８ａの
スタンド部８ｂに螺設された押えナツト９及びグ
ランドナツト１０によつて支架されて居り、弁棒
７と挿入穴４との間にはグランドパツキン１１が
介設されている。又、弁棒７の下端部には弁棒７
が弁棒挿入穴４に支架されたときに弁体２の廻り
止め凹所２ｄに嵌合しうる四角形状の廻り止め７
ａが形成されて居り、該廻り止め７ａはこれを廻
り止め凹所２ｄに嵌合したときに若干間隙ができ
る大きさに設定されている。 On the other hand, a metal valve stem 7 that can rotate the valve body 2 is inserted into the valve stem insertion hole 4 of the valve body 3 by means of a retainer nut 9 and a gland nut 10 screwed onto the stand portion 8b of the upper cover 8a. A gland packing 11 is interposed between the valve stem 7 and the insertion hole 4. Also, the lower end of the valve stem 7 is provided with a valve stem 7.
A square-shaped detent 7 that can fit into the detent recess 2d of the valve body 2 when the valve is supported in the valve stem insertion hole 4.
A is formed, and the rotation stopper 7a is set to a size such that a slight gap is created when the rotation stopper 7a is fitted into the rotation stopper recess 2d.
尚、第１図及び第２図に於いて、１２は弁箱３
と上部・下部カバー８ａ，８ｃとの間に介設され
たシート、１３は弁棒７の上端部に固着され弁棒
７を正逆回転させるハンドル、１４は上部カバー
８ａのスタンド部８ｄに固着された開度指示板、
１５はハンドル１３に枢結されその先端部が開度
指示板１４に掛止されて弁体２の開度を規定する
レバーである。 In addition, in FIGS. 1 and 2, 12 is the valve box 3.
and a seat interposed between the upper and lower covers 8a and 8c, 13 is a handle fixed to the upper end of the valve stem 7 and rotates the valve stem 7 in forward and reverse directions, and 14 is fixed to the stand part 8d of the upper cover 8a. the opening indication plate,
Reference numeral 15 designates a lever that is pivotally connected to the handle 13 and whose tip end is hooked to the opening degree indicating plate 14 to determine the degree of opening of the valve body 2.
上記実施例に於いては、弁棒７を金属製部材で
作製したが、本発明はこれに限定されるものでは
なく、当該弁棒７を弁体２及び弁箱３と同様にセ
ラミツク部材で作製しても良い。又、弁体２及び
弁棒３の材質も上記実施例に限定されるものでは
なく、当該弁体２及び弁棒３を金属製部材で作製
して良い。 In the above embodiment, the valve stem 7 is made of a metal member, but the present invention is not limited to this, and the valve stem 7 can be made of a ceramic member like the valve body 2 and the valve box 3. You may also create one. Further, the materials of the valve body 2 and the valve stem 3 are not limited to those in the above embodiments, and the valve body 2 and the valve stem 3 may be made of metal members.
前記弁体２と弁箱３を組立る場合には、先ず、
弁体２を、その平板部２ａの弁体シート面２a′が
弁箱３入口５の円弧状の内周面５ａと対向する水
平状態でもつて該入口５から挿入する（第５図及
び第６図参照）。次に、弁体２をこれの廻り止め
凹所２ｄが弁棒挿入穴４に対向する様に90度回転
させる。この様にすれば弁体シート面２a′，２
b′，２c′と弁箱シート面３ａ，３ｂ，３ｃとが適
合し、弁体２は弁箱シート３ａ，３ｂ，３ｃで回
動自在に支持された状態になる。即ち、両者は組
立られた状態になる。 When assembling the valve body 2 and valve body 3, first,
Insert the valve body 2 from the inlet 5 with the valve body seat surface 2a' of the flat plate portion 2a facing the arcuate inner peripheral surface 5a of the inlet 5 of the valve box 3 (see FIGS. 5 and 6). (see figure). Next, the valve body 2 is rotated 90 degrees so that the rotation stopper recess 2d faces the valve stem insertion hole 4. In this way, the valve body seat surfaces 2a', 2
b', 2c' and the valve box seat surfaces 3a, 3b, 3c match, and the valve body 2 is rotatably supported by the valve box seats 3a, 3b, 3c. That is, both are in an assembled state.
又、前記と逆の動作を行えば弁体２と弁箱３を
分解することができる。 Further, the valve body 2 and the valve body 3 can be disassembled by performing the operation opposite to the above.
前記バタフライ弁１は、ハンドル１５にて弁棒
７を正逆回転させることにより開閉弁することが
できる。即ち、第４図に示す開弁状態から弁棒７
を回転させるとこれに伴つて弁体２が回転し、平
板部２ａの弁体シート面２a′は弁箱３の弁箱シー
ト面３ａに当座して第３図に示す閉弁状態にな
る。このとき、弁体２は弁箱シート面３ａ，３
ｂ，３ｃに支持された状態になつて居り、然も弁
棒７の廻り止め部７ａと弁体２の廻り止め凹所２
ｄとの間には若干の間隙が形成されている為、弁
体２に流体圧（第２図矢印）が作用して当該弁体
２が下流側へ押圧されても、弁体２の廻り止め凹
所２ｄの上流側周囲部に剪断応力が作用すること
はない。又、弁体２は流体圧により下流圧へ押圧
され、然も弁体シート面２a′，２b′，２c′と弁箱
シート面３ａ，３ｂ，３ｃとは面接触になつてい
る為、弁体２と弁箱３の密合が確実且つ良好に行
われている。 The butterfly valve 1 can be opened and closed by rotating the valve stem 7 in forward and reverse directions using the handle 15. That is, the valve stem 7 is moved from the open state shown in FIG.
When the valve body 2 is rotated, the valve body 2 rotates accordingly, and the valve body seat surface 2a' of the flat plate portion 2a rests against the valve body seat surface 3a of the valve body 3, resulting in the closed state shown in FIG. At this time, the valve body 2 is
b, 3c, and the rotation stopper 7a of the valve stem 7 and the rotation stopper recess 2 of the valve body 2.
Since a slight gap is formed between the valve body d and the valve body 2, even if fluid pressure (arrow in Fig. 2) acts on the valve body 2 and pushes the valve body 2 downstream, the surroundings of the valve body 2 No shear stress acts on the upstream peripheral portion of the stop recess 2d. Further, the valve body 2 is pressed to the downstream pressure by the fluid pressure, and since the valve body seat surfaces 2a', 2b', 2c' and the valve body seat surfaces 3a, 3b, 3c are in surface contact, the valve body The body 2 and the valve body 3 are tightly and satisfactorily fitted together.
一方、第２図に示す閉弁状態から弁棒７を回転
させるとこれに伴つて弁体２も回転し、平板部２
ａの弁体シート面２a′が弁箱シート面３ａから離
座して第４図に示す開弁状態になる。弁体２が閉
弁する時に弁体２の廻り止め凹所２ｄの周囲部分
に大きなトルクが掛つても廻り止め凹所２ｄの周
囲部分の肉厚は厚くなつている為、この部分が破
損することはない。 On the other hand, when the valve stem 7 is rotated from the closed state shown in FIG. 2, the valve body 2 also rotates, and the flat plate part 2
The valve body seat surface 2a' of a is separated from the valve body seat surface 3a, and the valve is in the open state shown in FIG. Even if a large torque is applied to the area around the detent recess 2d of the valve element 2 when the valve element 2 closes, this area will be damaged because the wall around the detent recess 2d is thick. Never.
尚、上記実施例のバタフライ弁に於いては、流
体の接触する部分つまり弁体２及び弁箱３をセラ
ミツク部材で作製したので、耐蝕性・耐磨耗性等
に極めて優れている。 In the butterfly valve of the above embodiment, the parts that come in contact with fluid, that is, the valve body 2 and the valve body 3, are made of ceramic materials, so that they have excellent corrosion resistance and abrasion resistance.
本発明は、上記の構成であるから、以下の利点を
有する。Since the present invention has the above configuration, it has the following advantages.
(1) 弁体の閉弁時には当該弁体は弁箱シート面で
支持されて居り、然も弁体の廻り止め凹所の周
囲部分の肉厚を厚くした為、弁体の閉弁時に流
体圧が作用して廻り止め凹所の周囲部分に剪断
応力が作用しても弁体が破損することはない。(1) When the valve body is closed, the valve body is supported by the seat surface of the valve body, and since the wall around the rotation prevention recess of the valve body has been made thicker, when the valve body is closed, the valve body is supported by the seat surface of the valve body. Even if shear stress is applied to the surrounding area of the detent recess due to pressure, the valve body will not be damaged.
(2) 弁体の廻り止め凹所の周囲部分の肉厚を厚く
した為、弁体が閉弁から開弁する時に流体圧の
作用により廻り止め凹所の周囲部分に大きなト
ルクが掛つても弁体が破損することはない。(2) The wall around the detent recess of the valve body has been made thicker, so even when a large torque is applied to the area around the detent recess due to fluid pressure when the valve body is opened from closed, it will not work. The valve body will not be damaged.
(3) 弁体の廻り止め凹所に弁棒の廻り止め部を嵌
合するだけで弁体の回転操作を行える構成とし
た為、従来のバタフライ弁に比較して弁体と弁
棒の組立を極めて簡略化できる。(3) Because the valve body can be rotated simply by fitting the rotation stopper part of the valve stem into the rotation prevention recess of the valve body, the assembly of the valve body and valve stem is easier than with conventional butterfly valves. can be extremely simplified.
(4) 弁体シート面と弁箱シート面は面接触になつ
て居り、然も閉弁時には流体圧により弁体が下
流側へ押圧される為、これらシート面の密合を
確実且つ良好に行える。又、弁体は弁箱シート
面で支持されている為、弁体と弁棒の嵌合状態
に拘わらず弁体を常に正常な状態で弁箱シート
面に密合させることができる。その結果、従来
のバタフライ弁に比較してシール性能が極めて
優れている。(4) The valve body seat surface and the valve body seat surface are in surface contact, and since the valve body is pressed downstream by fluid pressure when the valve is closed, the tightness of these seat surfaces is ensured and good. I can do it. Further, since the valve body is supported by the valve body seat surface, the valve body can always be brought into close contact with the valve body seat surface in a normal state regardless of the fitted state of the valve body and the valve stem. As a result, the sealing performance is extremely superior compared to conventional butterfly valves.
(5) 従来の弁に比較して、弁棒は、回転トルクだ
けがかかり、弁箱に押し付けられる力がなく、
弁箱と弁箱の摩耗がない。(5) Compared to conventional valves, the valve stem is only subjected to rotational torque, and there is no force pressing against the valve body.
There is no wear on the valve body and valve body.
(6) 弁箱を一体的に形成した為、従来の様に複数
の部品で弁箱を形成したバタフライ弁に比較し
て部品点数を削減できる。又、弁箱にシート部
材を使用せずに当該弁箱シール性を向上するこ
とができる。(6) Since the valve box is integrally formed, the number of parts can be reduced compared to conventional butterfly valves in which the valve box is formed from multiple parts. Further, the sealing performance of the valve box can be improved without using a sheet member in the valve box.
(7) 弁体を一体的に形成された弁箱の入口から挿
入して弁箱シート面に適合できる構成とした
為、弁体と弁箱の組立を簡単に行え、バタフラ
イ弁自体の組立を簡略化できる。又、補修・点
検に際しても弁体と弁箱の分解を簡単に行え、
至極便利である。(7) The valve body can be inserted from the entrance of the integrally formed valve body and fitted to the valve body seat surface, making it easy to assemble the valve body and the valve body, and the butterfly valve itself can be assembled easily. Can be simplified. In addition, the valve body and valve box can be easily disassembled for repairs and inspections.
It's extremely convenient.
(8) 弁体には、上下方向のスラスト力がかからな
い。弁棒にかかるスラスト力は外部で受ける
為、スラリー等によるベアリングシートの摩耗
がなく、材質も制限されない。(8) No vertical thrust force is applied to the valve body. Since the thrust force applied to the valve stem is received externally, there is no wear of the bearing seat due to slurry, etc., and there are no restrictions on the material.
(9) 弁箱とシート面があるので、シート面に、特
別なシール材をはる必要がなく（例えばゴム
材）、構造が簡単でコストが低下する。(9) Since there is a valve box and a seat surface, there is no need to apply a special sealing material (for example, rubber material) to the seat surface, resulting in a simple structure and reduced costs.
この様に、本発明のバタフライ弁は極めて優れ
た効果を奏すことができる。 In this manner, the butterfly valve of the present invention can exhibit extremely excellent effects.
第１図は本発明の実施例を示す閉弁状態のバタ
フライ弁の右側面図、第２図は第１図の−線
断面図、第３図は弁箱を破断して示すバタフライ
弁の平面図、第４図は一部省略した開弁状態のバ
タフライ弁の断面図、第５図は弁体と弁箱の組
立・分解状態を示す参考断面図、第６図は同じく
参考左側面図、第７図は従来のバタフライ弁を示
す開弁状態の概略断面図、第８図は同じく開弁状
態の概略断面図である。
１はバタフライ弁、２は弁体、２ａは平板部、
２ｂは上方傘部、２ｃは下方傘部、２ｄは廻り止
め凹所、２a′，２b′，２c′は弁体シート面、３は
弁箱、３ａ，３ｂ，３ｃは弁箱シート面、４は弁
棒挿入穴、５は入口、６は出口、７は弁棒、７ａ
は廻り止め部、D1は入口周面間の内径寸法、D2
は出口内周面間の内径寸法、D3は弁体の直径、
D4は入口内面間の内径寸法、D5は弁体の最大厚
さ。
Fig. 1 is a right side view of a butterfly valve in a closed state showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a plan view of the butterfly valve with the valve box cut away. Figure 4 is a partially omitted sectional view of the butterfly valve in the open state, Figure 5 is a reference sectional view showing the assembly and disassembly of the valve body and valve body, and Figure 6 is a left side view for reference as well. FIG. 7 is a schematic cross-sectional view of a conventional butterfly valve in the open state, and FIG. 8 is a schematic cross-sectional view of the conventional butterfly valve in the open state. 1 is a butterfly valve, 2 is a valve body, 2a is a flat plate part,
2b is an upper umbrella part, 2c is a lower umbrella part, 2d is a rotation stopper, 2a', 2b', 2c' are valve body seat surfaces, 3 is a valve box, 3a, 3b, 3c are valve box seat surfaces, 4 is the valve stem insertion hole, 5 is the inlet, 6 is the outlet, 7 is the valve stem, 7a
is the rotation stopper, D 1 is the inner diameter dimension between the inlet circumferential surfaces, D 2
is the inner diameter dimension between the outlet inner peripheral surfaces, D 3 is the diameter of the valve body,
D 4 is the inner diameter dimension between the inlet inner surfaces, and D 5 is the maximum thickness of the valve body.
Claims (1)
部２ｂ及び下方方傘部２ｃとを備えた弁体２と、
平板部２ａの両側外周面並びに上方・下傘部２
ｂ，２ｃの外周面を凸球面とした弁体シート面２
a′，２b′，２c′と、弁体２の上方傘部２ｂに穿設
された廻り止め凹所２ｄと、入口５・出口６及び
弁棒挿入穴４を備え一体的に形成された円筒状の
弁箱３と、弁箱３に形成されて弁体シート面２
a′，２b′，２c′に適合する弁箱シート面３ａ，３
ｂ，３ｃと、弁箱３の弁箱棒挿入穴に支架されて
弁体２を回転操作しうる弁棒７と、弁棒７の下端
部に形成されて上方傘部２ｂの廻り止め凹所２ｄ
に嵌合しうる廻り止め部７ａとから成り、前記弁
箱３の入口５及び出口６を横長の略小判型に形成
し、入口５の両側に形成された円弧状の内周面５
ａ間の内径寸法D1を出口６側よりも大きくする
と共に、弁体２の直径D3以上とし、入口５の上
下に形成された平面状の内面５ｂ間の内径寸法
D4を弁体２の最大厚さD5以上とした事を特徴と
するバタフライ弁。1. A valve body 2 comprising a flat plate part 2a and an upper umbrella part 2b and a lower umbrella part 2c connected above and below the flat plate part 2a,
Both outer peripheral surfaces of the flat plate portion 2a and the upper and lower umbrella portions 2
Valve body seat surface 2 with the outer peripheral surfaces of b and 2c as convex spherical surfaces
a', 2b', 2c', a rotation prevention recess 2d drilled in the upper umbrella part 2b of the valve body 2, an integrally formed cylinder comprising an inlet 5, an outlet 6, and a valve stem insertion hole 4. a valve body 3 formed in the shape of a valve body 3, and a valve body seat surface 2 formed on the valve body 3.
Valve box seat surfaces 3a, 3 compatible with a', 2b', 2c'
b, 3c, a valve stem 7 that is supported in the valve body stem insertion hole of the valve body 3 and can rotate the valve body 2, and a rotation prevention recess formed at the lower end of the valve stem 7 and in the upper umbrella part 2b. 2d
The inlet 5 and outlet 6 of the valve box 3 are formed into a horizontally elongated substantially oval shape, and the inner circumferential surface 5 is arc-shaped and formed on both sides of the inlet 5.
The inner diameter dimension D 1 between a is larger than that on the outlet 6 side, and the diameter D 3 of the valve body 2 is greater than 3 , and the inner diameter dimension between the planar inner surfaces 5 b formed above and below the inlet 5.
A butterfly valve characterized in that D 4 is greater than or equal to the maximum thickness of the valve body 2, D 5 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11232382A JPS591876A (en) | 1982-06-28 | 1982-06-28 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11232382A JPS591876A (en) | 1982-06-28 | 1982-06-28 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS591876A JPS591876A (en) | 1984-01-07 |
| JPH0155708B2 true JPH0155708B2 (en) | 1989-11-27 |
Family
ID=14583792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11232382A Granted JPS591876A (en) | 1982-06-28 | 1982-06-28 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591876A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510869U (en) * | 1991-07-25 | 1993-02-12 | 株式会社日向精工 | Butterfly valve |
| WO2016045122A1 (en) * | 2014-09-28 | 2016-03-31 | Siemens Aktiengesellschaft | Valve, gas turbine system, and method for controlling the valve |
-
1982
- 1982-06-28 JP JP11232382A patent/JPS591876A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS591876A (en) | 1984-01-07 |
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