JPS6220777Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は副弁内蔵形バタフライバルブ構造に関
する。[Detailed Description of the Invention] The present invention relates to a butterfly valve structure with a built-in sub-valve.

従来主弁体内に副弁体を有し両弁体をそれぞれ
独立的に開閉して操作するバルブが存在する。特
に、実公昭48−25237号公報に示される代表的バ
タフライバルブについて説明すると、バルブ開閉
時主弁体の回転に副弁体は追従して動き、副弁体
のみの操作時には主弁体は回転しない構造であ
る。 2. Description of the Related Art Conventionally, there is a valve that has a sub-valve body within a main valve body and is operated by opening and closing both valve bodies independently. In particular, to explain the typical butterfly valve shown in Japanese Utility Model Publication No. 48-25237, the sub-valve body follows the rotation of the main valve body when opening and closing the valve, and when only the sub-valve body is operated, the main valve body rotates. It is a structure that does not.

しかし、水流が急激な場合等、主弁体の回転に
伴う副弁体の回転が水激にじやまされ、主弁体と
副弁体とが相対的に移動してしまう誤動作が生じ
る。 However, when the water flow is rapid, the rotation of the sub-valve body accompanying the rotation of the main valve body is severely slowed by the water, resulting in a malfunction in which the main valve body and the sub-valve body move relative to each other.

このような誤動作を防止するために、実公昭48
−25237号公報のものは、主弁軸と副弁軸との間
に摩擦力を発生させるために、主弁軸と副弁軸と
を摩擦接触させていた。 In order to prevent such malfunctions,
In the valve disclosed in No. 25237, the main valve shaft and the auxiliary valve shaft are brought into frictional contact in order to generate a frictional force between the main valve shaft and the auxiliary valve shaft.

したがつて、副弁のみを開閉する際には、大き
な軸回転力が必要となり、ギヤ等で回転を高めて
いた。 Therefore, when opening and closing only the auxiliary valve, a large shaft rotation force is required, and the rotation is increased by using gears or the like.

本考案の目的は副弁体として水激に影響される
バタフライバルブの利用をやめ、主副両弁の摩擦
力、ひいてはギヤの複雑な構造を採用する必要の
ない副弁内蔵形バタフライバルブ構造を提供する
ことである。 The purpose of this invention is to eliminate the use of a butterfly valve as a sub-valve body, which is affected by water pressure, and to create a butterfly valve structure with a built-in sub-valve that eliminates the need for friction between the main and sub-valves and the complicated structure of gears. It is to provide.

本考案は、上記目的を達成すべく、以下の構成
を採る。バタフライバルブの弁胴５に対して回動
操作作自在の主弁軸に一体化して装設されるバタ
フライ形主弁体Ａの一部に副弁孔２を貫通形成す
るとともに、該副弁孔２に連通するように主弁体
Ａの内部には副弁収納室３を形成し、前記副弁孔
２と副弁収納室３との間を回動を阻止され、昇降
のみ移動できて副弁孔２に合致し閉鎖できる副弁
体Ｂには前記主弁軸１内を貫通して延出する回転
操作自在の副弁軸４をねじ噛合させて装設すると
ともに、前記副弁軸４と主弁軸１との間には両軸
に沿つて空隙が存在するように構成する。 In order to achieve the above object, the present invention adopts the following configuration. A sub-valve hole 2 is formed through a part of the butterfly-type main valve body A which is integrally installed on the main valve shaft which can be rotated with respect to the valve body 5 of the butterfly valve. A sub-valve storage chamber 3 is formed inside the main valve body A so as to communicate with the main valve hole 2, and rotation between the sub-valve hole 2 and the sub-valve storage chamber 3 is prevented, and the sub-valve can only move up and down. A rotatably operable sub-valve shaft 4 extending through the main valve shaft 1 is installed in a threaded manner on the sub-valve body B which can be closed by matching with the valve hole 2. A gap exists between the main valve shaft 1 and the main valve shaft 1 along both shafts.

上記構成を採ることにより、主弁体Ａの開放時
に水撃が生じても、副弁体Ｂは主弁体Ａに支持さ
れてのみ回転することになり、主副両弁軸１，４
間に間隙を形成でき、副弁体Ｂを軽い力で開閉で
きる。 By adopting the above configuration, even if water hammer occurs when the main valve body A is opened, the sub valve body B will rotate only while being supported by the main valve body A, and both the main and sub valve shafts 1 and 4
A gap can be formed between them, and the sub-valve body B can be opened and closed with a light force.

更に、副弁体Ｂに伝える回転力を増強するため
の組合せギアも不要になる。 Furthermore, a combination gear for increasing the rotational force transmitted to the sub-valve body B is also not required.

次に、図面に示す実施例について説明する。 Next, the embodiment shown in the drawings will be described.

弁胴５の内方に嵌装するバタフライ形主弁体Ａ
の直径方向上部と下部には主弁軸１の下部と主弁
軸１ａの上部をそれぞれ嵌挿固定し、主弁軸１の
上部を弁胴５の上部に、主弁軸１ａの下部を弁胴
５の下部軸受６にそれぞれ回動自由に枢支し、主
弁体Ａの背面側外周には弁座７を装着し、該弁座
７が嵌接できる弁座８を弁胴５の内周に***形成
して構成する。 Butterfly type main valve body A fitted inside the valve body 5
The lower part of the main valve shaft 1 and the upper part of the main valve shaft 1a are fitted and fixed into the upper and lower parts of the main valve shaft 1a in the diametrical direction, respectively. A valve seat 7 is mounted on the outer periphery of the back side of the main valve body A, and a valve seat 8 into which the valve seat 7 can be fitted is mounted inside the valve body 5. Constructed by forming a ridge around the periphery.

前記弁胴５の上方に操作箱９を装設するととも
に、該操作箱９の内方から上方に前記主弁軸１を
延設し、操作箱９の内方における主弁軸１の部分
に嵌合固定したウオームホイール１０には外方か
らハンドル等で操作できるウオームギヤ１１を噛
合させ、主弁軸１の上端に固設した支持体１２の
外周一方には指針１３を延出形成し、操作箱９の
上面には指針１３に対応する目盛り板１４を装設
して構成する。 An operation box 9 is installed above the valve body 5, and the main valve shaft 1 is extended upward from the inside of the operation box 9. A worm gear 11 that can be operated from the outside with a handle or the like is meshed with the fitted and fixed worm wheel 10, and a pointer 13 is formed extending from one side of the outer periphery of a support 12 fixed to the upper end of the main valve shaft 1. A scale plate 14 corresponding to the pointer 13 is installed on the top surface of the box 9.

前記主弁体Ａの上下直径方向における中心より
やや下方部には前後方向に貫通する副弁孔２を形
成し、該副弁孔２の上方となる主弁体Ａの内部に
は副弁孔２に連通する副弁収納室３を形成し、副
弁孔２に合致できて副弁孔２に形成した弁座１５
に嵌接できる副弁体Ｂが副弁孔２と副弁収納室３
との間を移動できるように装設し、副弁体Ｂの内
部に形成した空胴１６の上方となる副弁体Ｂの上
部には雌ねじ体１７を固設し、前記主弁軸１の中
心部から副弁収納室３内にかけて遊嵌した副弁軸
４の下部には前記雌ねじ体１７に螺挿する雄ねじ
４ａを一体に形成し、前記支持体１２の内方にお
ける副弁軸４の部分にはスラスト軸受１８を装設
し、その上方にはパツキン部１９を装設し、上方
に延出した副弁軸４の上端にはハンドル２０を一
体に装設して構成する。 A sub-valve hole 2 penetrating in the front-rear direction is formed in a portion slightly below the center of the main valve body A in the vertical diametrical direction, and a sub-valve hole is provided inside the main valve body A above the sub-valve hole 2. A valve seat 15 is formed in the sub-valve hole 2 and can match the sub-valve hole 2.
The sub-valve body B that can be fitted into the sub-valve hole 2 and the sub-valve storage chamber 3
A female screw body 17 is fixedly installed in the upper part of the sub-valve body B, which is above the cavity 16 formed inside the sub-valve body B. A male thread 4a that is screwed into the female threaded body 17 is integrally formed at the lower part of the auxiliary valve shaft 4 that is loosely fitted from the center to the inside of the auxiliary valve storage chamber 3. A thrust bearing 18 is installed in the part, a packing part 19 is installed above it, and a handle 20 is integrally installed at the upper end of the auxiliary valve shaft 4 extending upward.

したがつて、バンドル２０でもつて副弁軸４を
回動させると、雄ねじ４ａと雌ねじ体１７との螺
合により、副弁体Ｂは上下動することになり、副
弁収納室３内に、第２図において仮想線で示すよ
うに上動すると副弁孔２が開かれることになり、
その状態で、副弁軸４をスラスト軸受１８等でス
ラスト方向に対し支持させることができる。 Therefore, when the auxiliary valve shaft 4 is rotated with the bundle 20, the auxiliary valve body B moves up and down due to the screw engagement between the male thread 4a and the female thread 17, and the auxiliary valve body B moves up and down, and the auxiliary valve body B moves up and down. When the auxiliary valve hole 2 is moved upward as shown by the imaginary line in Fig. 2, the sub valve hole 2 is opened.
In this state, the sub-valve shaft 4 can be supported in the thrust direction by the thrust bearing 18 or the like.

また、外方から、ウオームギヤ１１を回動させ
ると、主弁軸１が回動するとともに、主弁軸１を
中心にして主弁体Ａが回動し開閉させられること
になり、閉じ状態では弁座７と弁座８が接合し、
上方の指針１３により開閉度を表示できることに
なる。 Furthermore, when the worm gear 11 is rotated from the outside, the main valve shaft 1 is rotated, and the main valve body A is also rotated around the main valve shaft 1 to be opened and closed. Valve seat 7 and valve seat 8 are joined,
The degree of opening/closing can be displayed using the upper pointer 13.

このように本考案は、バタフライバルブの弁胴
に対して回動操作自在の主弁軸に一体化して装設
されるバタフライ形主弁体の一部に副弁孔を貫通
形成するとともに、該副弁孔に連通するように主
弁体の内部には副弁収納室を形成し、前記副弁孔
と副弁収納室との間を回動を阻止され、昇降のみ
移動できて副弁孔に合致し閉鎖できる副弁体には
前記主弁軸内を貫通して延出する回転操作自在の
副弁軸をねじ噛合させて装設するとともに、前記
副弁軸と主弁軸との間には軸に沿つて空隙が存在
するように構成したから、主弁体を主弁軸によ
り、またその主弁軸内の副弁軸により副弁体をそ
れぞれ良好に開閉操作することができ、操作性が
良くなる機能性の良い構造にすることができ、主
弁体の開放時に水撃が生じても、副弁体は主弁体
に支持されてのみ回転することになり、主副両弁
軸間に間隙を形成でき、副弁体を軽い力で開閉で
きる。更に副弁体に伝える回転力を増強するため
の組合せギヤも不要になり、簡単な構造にして好
適に実施できる特長を有する。 In this way, the present invention forms a sub-valve hole through a part of the butterfly-type main valve body, which is installed integrally with the main valve shaft that can be rotated with respect to the valve body of the butterfly valve, and A sub-valve storage chamber is formed inside the main valve body so as to communicate with the sub-valve hole, and the sub-valve hole is prevented from rotating between the sub-valve hole and the sub-valve storage chamber and can only move up and down. A rotatably operable sub-valve shaft extending through the main valve shaft is installed in the sub-valve body which can be closed in accordance with the above-mentioned main valve shaft, and is threadedly engaged with the sub-valve shaft. Since the main valve body is configured to have a gap along the shaft, the main valve body can be opened and closed easily by the main valve shaft, and the sub valve body can be opened and closed by the sub valve shaft within the main valve shaft. It is possible to create a highly functional structure that improves operability, and even if water hammer occurs when the main valve body opens, the sub valve body will only rotate while being supported by the main valve body, and both the main and sub valve bodies will be rotated. A gap can be formed between the valve stems, allowing the sub-valve body to be opened and closed with light force. Furthermore, there is no need for a combination gear for increasing the rotational force transmitted to the sub-valve body, and the present invention has the advantage that it can be implemented suitably with a simple structure.

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

図面は本考案の実施例を示し、第１図は要部の
断面図、第２図はその一部を示す。 １……主弁軸、Ａ……主弁体、２……副弁体、
Ｂ……副弁体、３……副弁収納室、４……副弁
軸。 The drawings show an embodiment of the present invention, with FIG. 1 being a sectional view of the main part, and FIG. 2 showing a part thereof. 1...Main valve shaft, A...Main valve body, 2...Sub-valve body,
B... Sub-valve body, 3... Sub-valve storage chamber, 4... Sub-valve shaft.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] バタフライバルブの弁胴に対して回動操作自在
の主弁軸に一体化して装設されるバタフライ形主
弁体の一部に副弁孔を貫通形成するとともに、該
副弁孔に連通するように主弁体の内部には副弁収
納室を形成し、前記副弁孔と副弁収納室との間を
回動を阻止され昇降のみ移動できて副弁孔に合致
し閉鎖できる副弁体には、前記主弁軸内を貫通し
て延出する回転操作自在の副弁軸をねじ噛合させ
て装設するとともに、前記副弁軸と主弁軸との間
には軸に沿つて空隙が存在するように構成したこ
とを特徴とする副弁内蔵形バタフライバルブの構
造。 A sub-valve hole is formed through a part of the butterfly-type main valve body, which is installed integrally with the main valve shaft which can be freely rotated with respect to the valve body of the butterfly valve, and communicates with the sub-valve hole. A sub-valve storage chamber is formed inside the main valve body, and the sub-valve body is prevented from rotating between the sub-valve hole and the sub-valve storage chamber, can only move up and down, and can be closed by matching with the sub-valve hole. is equipped with a rotatable sub-valve shaft that extends through the main valve shaft and is screwed into the main valve shaft, and a space is provided between the sub-valve shaft and the main valve shaft along the shaft. A structure of a butterfly valve with a built-in auxiliary valve, characterized in that the butterfly valve has a built-in auxiliary valve.