JPH022121Y2 - - Google Patents
Info
- Publication number
- JPH022121Y2 JPH022121Y2 JP19127984U JP19127984U JPH022121Y2 JP H022121 Y2 JPH022121 Y2 JP H022121Y2 JP 19127984 U JP19127984 U JP 19127984U JP 19127984 U JP19127984 U JP 19127984U JP H022121 Y2 JPH022121 Y2 JP H022121Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- valve stem
- stem
- eccentricity
- 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
- 230000037431 insertion Effects 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 description 15
- 239000002184 metal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Check Valves (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、同一のバタフライ弁で、弁体に対す
る弁棒中心の偏心量を種々に選択可能とすると共
に、弁体のみを独立して取外せるようにしたバタ
フライ弁に関する。[Detailed description of the invention] [Field of industrial application] The present invention allows the eccentricity of the center of the valve stem with respect to the valve body to be selected from various values in the same butterfly valve, and only the valve body can be mounted independently. Regarding the removable butterfly valve.
従来のバタフライ弁には、使用圧力に応じて弁
体に対する弁棒の位置を偏心させ、弁体の開作動
を容易としたチルチングタイプの逆止弁があり、
このような逆止弁として、例えば第10図に示す
ものが知られている。
Conventional butterfly valves include tilting type check valves that make it easier to open the valve body by eccentrically positioning the valve stem relative to the valve body according to the operating pressure.
As such a check valve, for example, one shown in FIG. 10 is known.
この逆止弁1は、弁箱2内に取付ける弁体3の
一側面に弁棒4を挿通する挿通孔3aを有する弁
棒取付部3bを、弁体中央から一側へ偏心して設
け、弁箱2の側壁に対向配置した軸受(図示せ
ず)を介して弁箱2内に水平に挿通する弁棒4
を、前記挿通孔3aに通し、セツトピン5により
弁体3と一体に回動可能としたもので、弁箱2外
へ延出する弁棒4の端部にアーム(図示せず)を
連結し、この先端にウエイト(図示せず)を設け
て、矢印A方向に流れる流体により弁体3に作用
する流体圧とウエイトの重量とのバランスで弁棒
4を回動し、これにより弁体3の周縁3cを弁箱
2の内面に周設した弁座2aから離間あるいは着
座させて自動的に弁体3を開閉する。 This check valve 1 has a valve stem attachment part 3b having an insertion hole 3a through which a valve stem 4 is inserted on one side of a valve body 3 installed in a valve box 2, eccentrically from the center of the valve body to one side. A valve rod 4 is inserted horizontally into the valve box 2 via a bearing (not shown) placed opposite to the side wall of the box 2.
is passed through the insertion hole 3a and is rotatable together with the valve body 3 by a set pin 5, and an arm (not shown) is connected to the end of the valve stem 4 extending outside the valve body 2. A weight (not shown) is provided at the tip of this, and the valve stem 4 is rotated by the balance between the fluid pressure acting on the valve body 3 and the weight of the weight due to the fluid flowing in the direction of arrow A, whereby the valve body 3 is rotated. The peripheral edge 3c of the valve body 3 is moved away from or seated on the valve seat 2a provided around the inner surface of the valve body 2 to automatically open and close the valve body 3.
また、第11図に示す逆止弁6の如く、前記逆
止弁1と略同様に構成され、挿通孔7aを有する
弁棒取付部7bを弁体中央から一側へ偏心させた
弁体7を、矢印A方向に流れる流体の上流側へ所
定角度傾斜させ、弁体7の自重で自動的に閉弁す
るようにしたものも知られている。 In addition, a check valve 6 shown in FIG. 11 has a valve body 7 that is constructed in substantially the same manner as the check valve 1 and has a valve stem mounting portion 7b having an insertion hole 7a eccentrically from the center of the valve body to one side. It is also known that the valve body 7 is inclined at a predetermined angle toward the upstream side of the fluid flowing in the direction of arrow A, and the valve body 7 automatically closes due to its own weight.
ところが、以上のような逆止弁は高圧用のもの
と低圧用のものとでは、弁体に作用するトルクの
関係から、弁体に対する弁棒の偏心量を変える必
要があり、例えば高圧用のものを低圧用に変更す
るには、低圧でも弁体の開作動が円滑に行なわれ
るように偏心量を大きくする必要がある。
However, due to the relationship between the torque acting on the valve disc, it is necessary to change the amount of eccentricity of the valve stem with respect to the valve disc between high-pressure and low-pressure check valves. In order to change the valve to a low pressure type, it is necessary to increase the amount of eccentricity so that the valve body can open smoothly even at low pressure.
このため、偏心量を変更するときは、弁箱や弁
体等の主要部品を新たに製作するか、あるいは
種々の偏心量に対応する主要部品を予め用意して
おかなければならず、また弁体を取外すには、バ
タフライ弁を分解して弁棒を抜出さなければ、弁
体を弁箱から取外すことができないので、弁体の
取外し作業にも手数が掛るという問題点があつ
た。 Therefore, when changing the amount of eccentricity, it is necessary to newly manufacture main parts such as the valve body and valve body, or to prepare main parts corresponding to various eccentricities in advance. In order to remove the body, the valve body cannot be removed from the valve box unless the butterfly valve is disassembled and the valve stem is taken out, so there is a problem in that it takes time and effort to remove the valve body.
そこで、本考案においては、同一のバタフライ
弁で弁体や弁箱を取換えることなく弁体に対する
弁棒の偏心量を簡単に変更可能とし、しかも弁箱
から弁体のみを独立して取外すことのできるバタ
フライ弁を提供することを目的とする。 Therefore, in the present invention, it is possible to easily change the amount of eccentricity of the valve stem with respect to the valve body without replacing the valve body or valve body in the same butterfly valve, and furthermore, it is possible to independently remove only the valve body from the valve body. The purpose of this invention is to provide a butterfly valve that can perform the following functions.
本考案においては上記問題点を解決するため、
弁箱内に弁体を回動可能に設け、該弁箱外壁に対
向配置される軸受を介して外部へ延出する弁棒に
より前記弁体の開閉操作を行うバタフライ弁にお
いて、前記両軸受のボスに弁棒を挿通する挿通孔
をボス軸心から偏倚して形成し、両軸受を弁箱に
ボス軸心中心に回転設定かつ脱着可能に設け、前
記弁棒が嵌合する弁棒取付具をボルト等の締結具
で弁体一側面に脱着可能に取付けたことを特徴と
する。
In this invention, in order to solve the above problems,
In a butterfly valve, a valve body is rotatably provided in a valve box, and the valve body is opened and closed by a valve stem extending to the outside via a bearing disposed opposite to the outer wall of the valve box. A valve stem mounting device in which the boss has an insertion hole through which the valve stem is inserted, which is offset from the boss axis, and both bearings are provided in the valve box so that they can be rotated around the boss axis and can be attached and detached, and the valve stem is fitted into the valve stem fitting. is removably attached to one side of the valve body using a fastener such as a bolt.
以上のように構成することにより、弁体に対す
る弁棒の偏心量を変更するときは、挿通孔をボス
軸心から偏倚して形成した両軸受を回転設定して
弁棒を挿通する挿通孔の位置を変えるとともに弁
棒の弁体への取付位置を変え、これにより弁棒を
弁体に対して偏心させるようにしたものである。
With the above configuration, when changing the amount of eccentricity of the valve stem with respect to the valve body, the insertion hole through which the valve stem is inserted is adjusted by rotating both bearings formed by making the insertion hole offset from the boss axis. In addition to changing the position, the attachment position of the valve stem to the valve body is also changed, thereby making the valve stem eccentric with respect to the valve body.
以下本考案のバタフライ弁をチルチングタイブ
の逆止弁に適用した一実施例を第1図乃至第9図
に基づいて説明する。
An embodiment in which the butterfly valve of the present invention is applied to a tilting type check valve will be described below with reference to FIGS. 1 to 9.
管路(図示せず)に接続して流体の流れを制御
するバタフライ弁10は、弁箱11の外壁に軸受
取付部11a,11aを設け、該軸受取付部11
a,11aに取付けて弁棒12を水平に支持する
軸受13,13に前記弁棒12を挿通し、この弁
棒12が嵌合する弁棒取付具14,14を介して
弁体15が弁棒12に取付けられる。 The butterfly valve 10, which is connected to a pipe (not shown) to control the flow of fluid, has bearing mounting portions 11a, 11a provided on the outer wall of a valve box 11.
The valve stem 12 is inserted into the bearings 13, 13 that are attached to the bearings 13, 11a and horizontally supports the valve stem 12, and the valve body 15 is connected to the valve via the valve stem fittings 14, 14 into which the valve stem 12 is fitted. It is attached to the rod 12.
前記弁箱11は、その前後位置に設けた接続フ
ランジ11b,11bにより管路に接続され、第
3図に示す如く、弁箱11内の矢印A方向へ流れ
る流体の上流側にはゴム弁座11cが周設されて
おり、前記軸受取付部11a,11aは弁箱11
の中央より若干上方に水平に対向配置され、前記
軸受13,13を嵌合する開口11d,11dの
端部には複数のボルト孔(図示せず)を等間隔に
設けたフランジ11e,11eが形成されてい
る。 The valve box 11 is connected to the pipeline by connecting flanges 11b, 11b provided at the front and rear positions thereof, and as shown in FIG. 11c is provided around the valve body 11, and the bearing mounting portions 11a, 11a
The flanges 11e, 11e are disposed horizontally opposite each other slightly above the center of the flange 11e, and have a plurality of bolt holes (not shown) provided at equal intervals at the ends of the openings 11d, 11d into which the bearings 13, 13 are fitted. It is formed.
弁棒12を水平に支持する前記軸受13は、第
3図に示すように弁体中心CVから弁棒中心CLま
での距離である偏心量Lを変更可能なように、即
ち弁体中心CVに対する弁棒中心CLの、弁箱11
の前後方向への偏心(以下一次偏心という)と、
上下方向への偏心(以下二次偏心という)を夫々
変更可能なように、そのボス13aに形成して弁
棒12を挿通する挿通孔13bを、ボス13aの
軸心から偏倚して開設すると共に、前記軸受取付
部11aのフランジ11eに当接するフランジ1
3cに、前記フランジ11eに設けたボルト孔に
対応する複数のボルト孔13dを等間隔に設けた
もので、弁棒中心CLの一次偏心量と二次偏心量
とを最小とする偏心量L1に設定して高圧状態で
使用するよう、前記挿通孔13bを下方に位置さ
せてボス13aを軸受取付部11aの開口11d
に嵌合し、フランジ11e,13cを前記ボルト
孔13dに挿通するボルト16により締結して軸
受取付部11aに脱着可能に設けられる。 The bearing 13 that horizontally supports the valve stem 12 is designed so that the eccentricity L, which is the distance from the valve body center C V to the valve stem center C L , can be changed as shown in FIG. Valve body 11 with valve stem center C L relative to C V
Eccentricity in the front-rear direction (hereinafter referred to as primary eccentricity),
In order to change the vertical eccentricity (hereinafter referred to as secondary eccentricity), an insertion hole 13b formed in the boss 13a and through which the valve stem 12 is inserted is opened offset from the axis of the boss 13a. , a flange 1 that abuts the flange 11e of the bearing mounting portion 11a.
3c, a plurality of bolt holes 13d corresponding to the bolt holes provided in the flange 11e are provided at equal intervals, and an eccentricity L that minimizes the primary eccentricity and secondary eccentricity of the valve stem center C L is provided. 1 and used in a high pressure state, the insertion hole 13b is positioned downward and the boss 13a is inserted into the opening 11d of the bearing mounting portion 11a.
The flanges 11e and 13c are fastened with bolts 16 inserted into the bolt holes 13d, and are removably provided in the bearing mounting portion 11a.
前記軸受13の挿通孔13bには、メタルブツ
シユ17が挿入されるとともに、メタルブツシユ
17と弁棒12との間にOリング18が介装さ
れ、弁棒12は、その両端を軸受13,13から
弁箱11外へ液密的に突出してあり、弁棒12に
は、該弁棒12を弁体15に取付ける弁棒取付具
14,14が嵌合される。 A metal bushing 17 is inserted into the insertion hole 13b of the bearing 13, and an O-ring 18 is interposed between the metal bushing 17 and the valve stem 12. The valve stem 12 protrudes liquid-tightly outside the box 11, and valve stem fittings 14, 14 for attaching the valve stem 12 to the valve body 15 are fitted into the valve stem 12.
この弁棒取付具14は、両側に複数のボルト孔
14aを設けた平板状の取付部14bの一側面中
央に、弁棒12を挿通する通孔14cを穿設した
弁棒固定部14dが一体に形成され、キー19を
介して弁棒12に嵌合される。そして、この弁棒
取付具14は、前記取付部14bに設けたボルト
孔14aに挿通するボルト20により弁体15の
下流側の側面に脱着可能に取付けられ、これによ
り弁体15が弁棒12に固定される。 This valve stem mount 14 has a valve stem fixing part 14d integrally formed with a through hole 14c through which the valve stem 12 is inserted, in the center of one side of a flat mounting part 14b with a plurality of bolt holes 14a on both sides. and is fitted onto the valve stem 12 via a key 19. The valve stem mount 14 is removably attached to the downstream side surface of the valve body 15 with a bolt 20 inserted into a bolt hole 14a provided in the attachment part 14b, so that the valve body 15 is attached to the valve stem 12. Fixed.
前記弁体15は、中央の面を平行とし、弁箱1
1のゴム弁座11cに着座する周縁部15a前後
面を鋭角に交叉させて円板状に形成され、前記軸
受13,13から突出する弁棒12の一端にアー
ム(図示せず)を連結し、このアームの先端にウ
エイト(図示せず)を取付けると共に、弁箱外壁
に設けたダツシユポツト(図示せず)により弁体
15の開閉作動を緩和し、管路内を流れる流体に
より該弁体15に作用する流体圧と前記ウエイト
の重量とのバランスで、弁体5を自動的に開閉す
るチルチング型の逆止弁として機能させる。 The valve body 15 has a central plane parallel to the valve body 1.
The peripheral edge part 15a seated on the rubber valve seat 11c of 1 is formed into a disk shape by crossing the front and rear surfaces at an acute angle, and an arm (not shown) is connected to one end of the valve rod 12 protruding from the bearings 13, 13. A weight (not shown) is attached to the tip of this arm, and a dowel pot (not shown) provided on the outer wall of the valve box eases the opening/closing operation of the valve body 15, so that the valve body 15 is opened and closed by the fluid flowing in the pipe. The valve body 5 functions as a tilting check valve that automatically opens and closes depending on the balance between the fluid pressure acting on the valve and the weight of the weight.
本実施例は以上のように構成したので、管路内
に高圧の流体を流すと、弁棒12の偏心量L1が
最小でも弁体15に作用する流体圧によつて弁体
15は弁棒12を中心に回動し、前記ウエイトの
重量と流体圧とのバランスにより前記ダツシユポ
ツトにて回動を緩和されつつ適切に開閉される。 Since the present embodiment is configured as described above, when high-pressure fluid is caused to flow in the pipe line, even if the eccentricity L 1 of the valve stem 12 is the minimum, the fluid pressure acting on the valve body 15 causes the valve body 15 to become a valve. It rotates around a rod 12, and is opened and closed appropriately at the dart pot while its rotation is relaxed by the balance between the weight of the weight and the fluid pressure.
このとき弁体15の開弁あるいは閉弁時のトル
クについてみると、軸受13等による弁棒12の
回動に対する抵抗として作用する軸受トルクTB
は、比例定数をαとすると、
TB=弁棒径×弁体前後の差圧×α
となり、一方弁体15が流体から受ける流体圧に
より回動力として作用する流体トルクTDは、比
例定数をβとすれば、
TD=偏心量(L)×弁体前後の差圧×β
となり、しかも他のトルクは微小で無視しうるか
ら、弁体15に作用する全トルクTは
T=TD−TB
となる。 At this time, considering the torque when the valve body 15 opens or closes, the bearing torque T B that acts as resistance to the rotation of the valve stem 12 by the bearing 13 etc.
If α is the constant of proportionality, then T B = diameter of the valve stem × pressure difference before and after the valve body × α, and on the other hand, the fluid torque T D that acts as a turning force due to the fluid pressure that the valve body 15 receives from the fluid is the constant of proportionality. If β is, T D = Eccentricity (L) x Differential pressure across the valve body x β. Furthermore, other torques are so small that they can be ignored, so the total torque T acting on the valve body 15 is T = T. D −T B.
従つて、高圧使用のため偏心量Lを小さく設定
すると、流体トルクTDが小さく、弁体に作用す
る全トルクTが小さくなるから、前記ダツシユポ
ツトは低圧用のものを使用でき、しかも弁体15
の作動時間を任意に調整することができる。ま
た、偏心量L1を最小としたから流体の逆流時に
発生するトルクも小さくなる。 Therefore, if the eccentricity L is set small for high pressure use, the fluid torque T D will be small and the total torque T acting on the valve body will be small.
The operating time can be adjusted arbitrarily. Furthermore, since the eccentricity L 1 is minimized, the torque generated when the fluid flows backward is also reduced.
一方、該バタフライ弁10を低圧状態で使用す
るときは、流体トルクTDを大きく設定する必要
上、弁体中心CVに対する弁棒中心CLの一次偏心
量あるいは二次偏心量又はこれらの双方を増加し
て偏心量Lを大きくするが、例えば、二次偏心に
より偏心量Lを増加するときは、第6図及び第7
図に示す如く、軸受13を軸受取付部11aに固
定するボルト16を外し、この軸受13を180゜回
転して設定し、挿通孔13bを弁箱11の上側に
位置させることにより偏心量L2を偏心量L1より
大きく設定できる。 On the other hand, when the butterfly valve 10 is used in a low pressure state, it is necessary to set a large fluid torque T D , and therefore the primary eccentricity or the secondary eccentricity of the valve stem center C L with respect to the valve body center C V or both of these For example, when increasing the eccentricity L by secondary eccentricity, as shown in Figs. 6 and 7.
As shown in the figure, by removing the bolt 16 that fixes the bearing 13 to the bearing mounting portion 11a, rotating the bearing 13 by 180 degrees, and positioning the insertion hole 13b above the valve body 11, the amount of eccentricity L 2 can be reduced. can be set larger than the eccentricity L1 .
また、一次偏心と二次偏心の双方を行なつて偏
心量Lを変えるときは、第8図及び第9図に示す
如く、軸受13を90゜回転して設定し、挿通孔1
3bを弁箱11の下流側(図中左側)に位置させ
る。このとき弁棒中心CLの一次偏心によつて、
弁棒中心CLと弁体中心CVとが弁箱11の前後方
向にズレ、弁棒取付具14と弁体15との間に一
次偏心分の隙間が生ずるが、この隙間はスペーサ
21を介装して弁体15に弁棒取付具14を取付
ければよい。 In addition, when changing the amount of eccentricity L by performing both primary eccentricity and secondary eccentricity, the bearing 13 is rotated 90 degrees and set as shown in FIGS. 8 and 9.
3b is located downstream of the valve box 11 (on the left side in the figure). At this time, due to the primary eccentricity of the valve stem center C L ,
The valve stem center C L and the valve body center C V are misaligned in the front-rear direction of the valve body 11, and a gap corresponding to the primary eccentricity is created between the valve stem fixture 14 and the valve body 15. The valve stem fitting 14 may be attached to the valve body 15 by intervening.
尚、本実施例において、軸受及び軸受取付部の
フランジに穿設するボルト孔を多く設ければ、偏
心量Lを小刻みに変化させることが可能であり、
また弁棒と弁棒取付具との固定嵌合は、キーに代
えてスプライン、セレーシヨン等の手段を用いる
こともできる。 In addition, in this embodiment, if a large number of bolt holes are provided in the flange of the bearing and the bearing mounting part, it is possible to change the eccentricity L in small increments.
Further, for the fixed fitting between the valve stem and the valve stem fitting, means such as splines or serrations may be used instead of the key.
本考案のバタフライ弁は以上説明したように、
弁箱外壁に対向配置して弁棒を支持する軸受のボ
スに、弁棒を挿通する挿通孔をボス軸心から偏倚
して形成し、両軸受を弁箱にボス軸心中心に回転
設定かつ脱着可能に設けるとともに、弁棒を弁棒
取付具によつて弁体一側面に脱着可能に取付ける
ようにしたから、軸受を弁箱に設ける際に両軸受
をそのボス軸心回りに回転して挿通孔を所望の位
置に設定し、これに合せて弁棒を弁棒取付具によ
つて弁体の所定位置に取付けることにより、弁体
に対する弁棒の偏心量を簡単に変更することがで
き、これにより一つのバタフライ弁で使用圧力が
異なる場合にも対応することができるので、バタ
フライ弁の使用範囲を拡大して、生産コストを低
減することができる。
As explained above, the butterfly valve of this invention has
An insertion hole through which the valve stem is inserted is formed in the boss of the bearing that is arranged opposite to the outer wall of the valve box to support the valve stem, and both bearings are set to rotate around the boss axis in the valve box. In addition to being removable, the valve stem is removably attached to one side of the valve body using a valve stem mount, so when installing the bearings in the valve box, both bearings can be rotated around their boss axes. By setting the insertion hole at the desired position and then attaching the valve stem to the specified position on the valve body using the valve stem mount, the amount of eccentricity of the valve stem relative to the valve body can be easily changed. As a result, a single butterfly valve can be used even when different working pressures are used, so the range of use of the butterfly valve can be expanded and production costs can be reduced.
また、弁棒と弁体は弁棒取付具を介して取付け
られるので、弁棒周辺の止水部等の損傷によつて
弁体や弁座の交換が必要となつたときは、弁棒取
付具を弁体から外せば、バタフライ弁を分解する
ことなく簡単に弁体のみを取外すことができ、弁
体や弁座等の交換を容易に行うことが可能とな
る。 In addition, the valve stem and valve body are attached via a valve stem mount, so if the valve body or valve seat needs to be replaced due to damage to the water stop area around the valve stem, the valve stem attachment By removing the tool from the valve body, only the valve body can be easily removed without disassembling the butterfly valve, and the valve body, valve seat, etc. can be easily replaced.
更に弁体と弁座は閉弁時のみ当接するから弁座
の摩耗が少なくなり、耐久性が向上する。 Furthermore, since the valve body and valve seat come into contact only when the valve is closed, wear on the valve seat is reduced and durability is improved.
第1図乃至第9図は本考案の一実施例を示すも
ので、第1図はバタフライ弁の正面図、第2図は
同じく側面図、第3図は第1図の−断面図、
第4図は軸受の正面図、第5図は第4図の−
断面図、第6図は乃至第9図は弁体中心に対して
弁棒中心を偏心させた状態を示す説明図で、第6
図及び第8図は夫々断面正面図、第7図及び第9
図は夫々側面図、第10図及び第11図はチルチ
ングタイプの逆止弁に用いた従来のバタフライ弁
を示すもので、第10図は弁体を直立させたバタ
フライ弁の断面正面図、第11図は同じく傾斜さ
せたバタフライ弁の断面正面図である。
10……バタフライ弁、11……弁箱、12…
…弁棒、13……軸受、13a……ボス、13b
……挿通孔、13c……フランジ、13d……ボ
ルト孔、14……弁棒取付具、14a……ボルト
孔、14b……取付部、14c……通孔、14d
……弁棒固定部、15……弁体、17……メタル
ブツシユ、18……Oリング、19……キー、2
1……スペーサ、CV……弁体中心、CL……弁棒
中心、L……偏心量。
1 to 9 show an embodiment of the present invention, in which FIG. 1 is a front view of the butterfly valve, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view of the butterfly valve.
Figure 4 is a front view of the bearing, and Figure 5 is the − of Figure 4.
The sectional views and FIGS. 6 to 9 are explanatory diagrams showing a state in which the center of the valve stem is eccentric with respect to the center of the valve body.
Figures 7 and 8 are sectional front views, Figures 7 and 9, respectively.
The figures are respectively side views, and Figures 10 and 11 show a conventional butterfly valve used in a tilting type check valve. Figure 10 is a cross-sectional front view of the butterfly valve with the valve body upright. FIG. 11 is a cross-sectional front view of the butterfly valve also tilted. 10...Butterfly valve, 11...Valve box, 12...
...Valve stem, 13...Bearing, 13a...Boss, 13b
...Insertion hole, 13c...Flange, 13d...Bolt hole, 14...Valve stem fitting, 14a...Bolt hole, 14b...Mounting part, 14c...Through hole, 14d
... Valve stem fixing part, 15 ... Valve body, 17 ... Metal bushing, 18 ... O-ring, 19 ... Key, 2
1... Spacer, C V ... Valve body center, C L ... Valve stem center, L... Eccentricity.
Claims (1)
対向配置される軸受を介して外部へ延出する弁棒
により前記弁体の開閉操作を行うバタフライ弁に
おいて、前記両軸受のボスに弁棒を挿通する挿通
孔をボス軸心から偏倚して形成し、両軸受を弁箱
にボス軸心中心に回転設定かつ脱着可能に設け、
前記弁棒が嵌合する弁棒取付具をボルト等の締結
具で弁体一側面に脱着可能に取付けたことを特徴
とするバタフライ弁。 In a butterfly valve, a valve body is rotatably provided in a valve box, and the valve body is opened and closed by a valve stem extending to the outside via a bearing disposed opposite to the outer wall of the valve box. An insertion hole through which the valve stem is inserted is formed in the boss offset from the boss axis, and both bearings are provided in the valve box so that they can be set to rotate around the boss axis and can be detached.
A butterfly valve characterized in that a valve stem fitting into which the valve stem fits is removably attached to one side of the valve body with a fastener such as a bolt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19127984U JPH022121Y2 (en) | 1984-12-17 | 1984-12-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19127984U JPH022121Y2 (en) | 1984-12-17 | 1984-12-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61104859U JPS61104859U (en) | 1986-07-03 |
JPH022121Y2 true JPH022121Y2 (en) | 1990-01-18 |
Family
ID=30748715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19127984U Expired JPH022121Y2 (en) | 1984-12-17 | 1984-12-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH022121Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4233110B1 (en) * | 2007-08-01 | 2009-03-04 | 株式会社巴技術研究所 | Control valve |
-
1984
- 1984-12-17 JP JP19127984U patent/JPH022121Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61104859U (en) | 1986-07-03 |
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