JP3103069B1 - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JP3103069B1 JP3103069B1 JP11128600A JP12860099A JP3103069B1 JP 3103069 B1 JP3103069 B1 JP 3103069B1 JP 11128600 A JP11128600 A JP 11128600A JP 12860099 A JP12860099 A JP 12860099A JP 3103069 B1 JP3103069 B1 JP 3103069B1
- Authority
- JP
- Japan
- Prior art keywords
- valve
- heat
- shafts
- valve body
- shaft
- 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 - Fee Related
Links
Landscapes
- Lift Valve (AREA)
Abstract
【要約】
【課題】急冷やダストの吹き込みにより、弁軸等にクラ
ックが発生してしまう。
【解決手段】弁体３に第１弁軸３ａと第２弁軸３ｂとを
備える。両弁軸３ａ，３ｂには、同弁軸よりも大径に形
成された防熱・防温用のセラミックリング３ｃ，３ｄを
連設せしめる。セラミックリング３ｃ，３ｄは、流路２
に臨むべく弁体３と両弁軸３ａ，３ｂとの間に突設され
た環状突起からなる。この弁軸３ａ，３ｂ及びセラミッ
クリング３ｃ，３ｄは、窒化珪素（Ｓｉ3Ｎ4）約８０重
量％と、希土類酸化物（Ｙ2Ｏ3、Ｙｂ2Ｏ3）約２０重量
％とを混合して１４００〜２１００℃の高温で焼成して
なる窒化珪素焼結体から成形されている。従って、この
窒化珪素焼結体は、曲げ強度（１０００〜１４００℃
時）７６０〜８００Ｍｐａ、耐熱衝撃性１２００℃の材
料特性を有するため、弁体方向への高温高熱の流入を有
効的に減滅して、Ｏリング、Ｖリング、グランド部を防
温防熱する。Abstract: Cracks occur on a valve shaft or the like due to rapid cooling or blowing of dust. A valve body includes a first valve shaft and a second valve shaft. The two valve shafts 3a and 3b are provided with ceramic rings 3c and 3d for heat and temperature protection formed to have a larger diameter than the valve shafts. The ceramic rings 3c and 3d
Is formed between the valve body 3 and the valve shafts 3a and 3b. The valve shafts 3a, 3b and the ceramic rings 3c, 3d are made by mixing about 80% by weight of silicon nitride (Si 3 N 4 ) and about 20% by weight of rare earth oxides (Y 2 O 3 , Yb 2 O 3 ). From a sintered silicon nitride sintered at a high temperature of 1400 to 2100 ° C. Therefore, this silicon nitride sintered body has a bending strength (1000 to 1400 ° C.).
Time) Since it has the material properties of 760 to 800 Mpa and thermal shock resistance of 1200 ° C., the inflow of high temperature and high heat in the direction of the valve body is effectively reduced, and the O-ring, V-ring, and the ground are heat- and heat-insulated.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高炉用のバタフラ
イ弁の改良に関し、更に詳しくは、弁軸方向への高温高
熱の流入を防止して高炉の休風時における急冷（熱衝
撃）によるセラミック弁及び弁軸のクラックの発生を防
止する有用な高炉用バタフライ弁に関する。BACKGROUND OF THE INVENTION The present invention relates to improvements in butterfly <br/> Lee valve for blast furnace, and more particularly, to prevent the inflow of high temperature high heat quenching during deactivation wind blast of the valve axis ( Heat shock
The present invention relates to a ceramic valve and a useful blast furnace butterfly valve for preventing the occurrence of cracks in the valve shaft caused by the blow .
【０００２】[0002]
【従来の技術】一般に、高炉の羽口からは、高温高圧の
エアー（例えば、１１００〜１３５０℃、圧力４．５〜
５．８ｋｇ／ｃm2(ケージ圧)）が吹き込まれており、そ
の空気流量を制御するため、羽口毎にそれぞれ独立して
バタフライ弁が装着されている。2. Description of the Related Art Generally, high-temperature, high-pressure air (for example, 1100 to 1350 ° C., pressure 4.5 to 4.5) is introduced from a tuyere of a blast furnace.
5.8 kg / cm 2 (cage pressure)), and a butterfly valve is independently installed for each tuyere to control the air flow rate.
【０００３】従来、斯かるバタフライ弁としては、例え
ば、図５に示す構成のものが従来例として既に周知であ
る。この従来のバタフライ弁は、内周に断熱材と耐火材
とからなる二重の耐火断熱層をもって形成した熱流体の
流路２と、該流路２内に開閉自在に配設されたセラミッ
ク製の弁体３と、該弁体３に弁軸３ａを介して連動され
た駆動モータ２３とを備えている。Conventionally, as such a butterfly valve, for example, the one having the configuration shown in FIG. 5 is already known as a conventional example. This conventional butterfly valve has a hot fluid channel 2 formed with a double refractory heat insulating layer made of a heat insulating material and a refractory material on the inner periphery thereof, and a ceramic fluid valve disposed in the flow channel 2 so as to be openable and closable. And a drive motor 23 interlocked with the valve body 3 via a valve shaft 3a.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来のバタフライ弁にあっては、弁体３がセラミック
製であるため、摩耗が少ないといった利点を有するもの
の、急冷やダストの吹き込みにより、弁体３或いは弁軸
３ａにクラックが発生してしまうといった問題を有す
る。However, in the above-mentioned conventional butterfly valve, although the valve body 3 is made of ceramic, the valve body 3 has an advantage that it has little wear. However, the valve body is formed by rapid cooling or dust blowing. There is a problem that cracks occur in the valve shaft 3 or the valve shaft 3a.
【０００５】特に、急冷によるクラックの発生例として
は、高炉の休風時に、前述した１１００〜１３５０℃の
送風を瞬時にストップすると、休風後２０分以内に、ブ
ローパイプ（図示せず）より、視口カバー開口時に、雰
囲気エアー（ｍｉｎ）１５℃を自然ドラフトにより吸い
込んでしまうことに起因する。[0005] In particular, as an example of the occurrence of cracks due to rapid cooling, when the above-mentioned blowing at 1100 to 1350 ° C is instantaneously stopped during the shut-down of the blast furnace, the blow-pipe (not shown) is used within 20 minutes after the shut-down. Atmospheric air (min) of 15 ° C. is sucked in by natural draft when the viewing opening is opened.
【０００６】これは、環状管或いは熱風炉内に装着され
ているブリーダバルブが、熱風炉から高炉内への空気流
入を防止すると共に、炉内に残留しているガスの排出を
するため、その瞬間に雰囲気エアー（外気）がセラミッ
ク弁の方向へと流れ、かつ、ブリーダー弁へとドラフト
圧がかかることも相俟って、急冷される表面と内部の温
度差による熱衝撃（以下、単に熱衝撃性という）によ
り、セラミック弁や弁軸にクラックを発生させてしまう
のである。[0006] This is because a bleeder valve mounted in an annular tube or a hot blast stove prevents air from flowing into the blast furnace from the hot stove and discharges gas remaining in the furnace. Atmospheric air (outside air) instantaneously flows in the direction of the ceramic valve, and the draft pressure is applied to the bleeder valve. This causes cracks in the ceramic valve and valve stem.
【０００７】この場合は、１時間に約１５０℃の温度降
下によりクラックが発生することになり、就中、６００
℃に下がるまでにクラックが発生するため、セラミック
製の弁や弁軸を使用する場合、曲げ強度は勿論のこと高
耐熱衝撃性も要求される。In this case, cracks occur due to a temperature drop of about 150 ° C. per hour,
Since cracks occur before the temperature drops to ° C., when a ceramic valve or valve stem is used, not only bending strength but also high thermal shock resistance are required.
【０００８】本発明はこのような従来の問題点及び要求
に鑑みてなされたもので、弁体方向への高温高熱の流入
を防止して休風時における急冷との温度差によるセラミ
ック弁及び弁軸のクラックの発生を防止した有用なバタ
フライ弁を提供することを目的としたものである。SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems and demands, and a ceramic valve and a valve which prevent the inflow of high temperature and high heat in the direction of a valve body and have a temperature difference from quenching at the time of shutoff. It is an object of the present invention to provide a useful butterfly valve that prevents generation of a shaft crack.
【０００９】[0009]
【課題を解決するための手段】上述の如き従来の問題点
を解決し、所期の目的を達成するため本発明の要旨とす
る構成は、高温流体の流路内に開閉自在に配設された弁
体と、該弁体に突設された少なくとも一以上の弁軸と、
該弁軸にスピンドル等を介して連動された弁回転手段と
を備えてなるバタフライ弁において、前記弁軸は、同弁
軸の外周に周設された大径のセラミックリングを備えて
なり、かつ、該セラミックリングを、前記スピンドルの
弁軸側及び弁軸を被装するパイプの解放端側を閉塞すべ
く同パイプ内に回転自在に介在して前記高温流体の流路
内に位置しないように臨ませてなる高炉用バタフライ弁
に存する。SUMMARY OF THE INVENTION In order to solve the conventional problems as described above and to achieve the intended object, a configuration according to the present invention is provided so as to be openable and closable in a flow path of a high-temperature fluid. A valve body, at least one or more valve shafts protruding from the valve body,
In the butterfly valve formed by a linkage to a valve rotating means via a spindle like the valve shaft, the valve shaft is provided with a circumferentially provided by large diameter of the ceramic ring on the outer periphery of the Dobenjiku
And the ceramic ring is attached to the spindle.
The valve shaft and the open end of the pipe covering the valve shaft should be closed.
Flow path of the high-temperature fluid interposed rotatably in the pipe
Butterfly valves for blast furnaces that are positioned not to be located inside .
【００１０】また、弁軸及び／又はセラミックリング
は、窒化珪素（Ｓｉ3Ｎ4）約８０重量％と、希土類酸化
物（Ｙ2Ｏ3、Ｙｂ2Ｏ3）約２０重量％とを混合して１４
００〜２１００℃の高温で焼成してなる曲げ強度（１０
００〜１４００℃時）７６０〜８００Ｍｐａ、耐熱衝撃
性１２００℃の窒化珪素焼結体で成形するのが良い。[0010] The valve stem and / or the ceramic ring are formed by mixing about 80% by weight of silicon nitride (Si 3 N 4 ) and about 20% by weight of rare earth oxides (Y 2 O 3 , Yb 2 O 3 ). 14
Flexural strength obtained by firing at a high temperature of 100 to 2100 ° C (10
It is preferable to form a silicon nitride sintered body having a temperature of 760 to 800 Mpa and a thermal shock resistance of 1200 ° C.
【００１１】このように構成される本発明に係る高炉用
バタフライ弁は、前記弁軸が、同弁軸の外周に周設され
た大径のセラミックリングを備えてなり、かつ、該セラ
ミックリングを、前記スピンドルの弁軸側及び弁軸を被
装するパイプの解放端側を閉塞すべく同パイプ内に回転
自在に介在して前記高温流体の流路内に位置しないよう
に臨ませたことによって、セラミックリングそのものが
流路内に露呈されることなく前記パイプの解放端側を閉
塞するため、弁軸方向への高温高熱の流入を有効的に減
滅し得ると共に、温度差による熱衝撃を受けにくく、ま
た、弁体に極端な振動が発生した時は、先にセラミック
リングがパイプの内周面に当接し、両弁軸をサポートし
得ることとなる。In the butterfly valve for a blast furnace according to the present invention, the valve shaft is provided around the outer periphery of the valve shaft.
It comprises a large-diameter ceramic rings, and the sera
Cover the mix ring with the valve shaft side of the spindle and the valve shaft.
Into the pipe to close the open end of the pipe to be mounted
So as not to be positioned in the flow path of the high temperature fluid
The ceramic ring itself
Close the open end of the pipe without being exposed in the flow path
Blockage effectively reduces the flow of high temperature and heat in the valve axis direction.
As well as being less susceptible to thermal shock due to temperature differences.
If extreme vibrations occur in the valve body,
The ring comes into contact with the inner peripheral surface of the pipe, and can support both valve shafts .
【００１２】[0012]
【００１３】[0013]
【発明の実施の形態】次に、本発明の実施の一例を図面
を参照しながら説明する。尚、理解を容易にするため、
前述した従来例と同一部分は同一符号で示し、構成の異
なる処のみを新たな番号を付して以下に説明する。Next, an embodiment of the present invention will be described with reference to the drawings. For easy understanding,
The same parts as those of the above-described conventional example are denoted by the same reference numerals, and only the parts having different configurations will be described with new numbers attached thereto.
【００１４】図中Ａは、本発明に係るバタフライ弁であ
り、このバタフライ弁Ａは、図１乃至図２に示すよう
に、左右両端が開放された円筒状のケーシング１と、該
ケーシング１内に形成された熱流体の流路２と、該流路
２内に回転可能に配設された弁体３とを備えている。In the drawings, A is a butterfly valve according to the present invention. As shown in FIGS. 1 and 2, the butterfly valve A has a cylindrical casing 1 having left and right ends opened, And a valve body 3 rotatably disposed in the flow path 2.
【００１５】ケーシング１は、鋼板等の適宜素材から円
筒状に形成されており、左右両端縁に突設された接続用
の環状フランジ４，４と、上下方向にそれぞれ短パイプ
５と軸受６とを介して装着された後述の弁回転手段８と
を備えている。The casing 1 is formed of a suitable material such as a steel plate into a cylindrical shape, and has annular flanges 4 and 4 for connection protruding from both left and right edges, and a short pipe 5 and a bearing 6 in the vertical direction, respectively. And a valve rotating means 8 described below, which is mounted via the.
【００１６】また、流路２は、前記ケーシング１の内周
に断熱材及び／又は耐火材からなる内張り７をもって長
手方向に貫通すべく区画形成されている。尚、耐火材と
しては高アルミナ質等が挙げられる。The channel 2 is formed in the inner periphery of the casing 1 with a lining 7 made of a heat insulating material and / or a refractory material so as to penetrate in the longitudinal direction. Incidentally, as the refractory material, a high alumina material or the like can be used.
【００１７】一方、前記弁体３は、セラミックで形成さ
れており、この弁体３の周端面から上下方向に突出する
第１弁軸３ａと第２弁軸３ｂとを備えている。On the other hand, the valve body 3 is formed of ceramic, and has a first valve shaft 3a and a second valve shaft 3b which project vertically from the peripheral end surface of the valve body 3.
【００１８】また、これら両弁軸３ａ，３ｂには、同弁
軸よりも大径に形成された防熱・防温用のセラミックリ
ング３ｃ，３ｄが連設されている。Further, ceramic rings 3c and 3d for heat and temperature protection, which are formed to have a larger diameter than the valve shafts, are connected to the two valve shafts 3a and 3b.
【００１９】このセラミックリング３ｃ，３ｄは、前記
熱流体の流路２に臨むべく弁体３と両弁軸３ａ，３ｂと
の間に突設された環状突起からなり、換言すれば、流路
２に臨む前記短パイプ５の解放端５ａ側を回転自在に閉
塞すべく両弁軸３ａ，３ｂの基端側（付け根）に周設さ
れている。The ceramic rings 3c and 3d are formed by annular projections projecting between the valve body 3 and the valve shafts 3a and 3b so as to reach the flow path 2 of the thermal fluid. 2 is provided around the base ends (roots) of both valve shafts 3a and 3b so as to rotatably close the open end 5a side of the short pipe 5 facing the second pipe 2.
【００２０】この弁軸３ａ，３ｂ及びセラミックリング
３ｃ，３ｄは、窒化珪素（Ｓｉ3Ｎ4）約８０重量％と、
希土類酸化物（Ｙ2Ｏ3、Ｙｂ2Ｏ3）約２０重量％とを混
合して１４００〜２１００℃の高温で焼成してなる窒化
珪素焼結体から成形されている。The valve shafts 3a and 3b and the ceramic rings 3c and 3d contain about 80% by weight of silicon nitride (Si 3 N 4 ).
Rare earth oxide (Y 2 O 3, Yb 2 O 3) is formed from about 20 wt% and the mixture to 1,400 to 2,100 high temperatures in baking formed by silicon nitride sintered bodies ° C..
【００２１】従って、この窒化珪素焼結体は、下表１に
示すように、曲げ強度（１０００〜１４００℃時）７６
０〜８００Ｍｐａ、耐熱衝撃性１２００℃の材料特性を
有しているため、弁体方向への高温高熱の流入を有効的
に減滅して後述するＯリング１４、Ｖリング１５、グラ
ンド部１８の防温防熱の対策となると共に、極端な振動
が発生した時、両軸５ａ，５ｂをサポートする軸承の働
きも有するのである。Therefore, as shown in Table 1 below, this silicon nitride sintered body has a flexural strength (at 1000 to 1400 ° C.) of 76%.
Since it has a material characteristic of 0 to 800 Mpa and a thermal shock resistance of 1200 ° C., the inflow of high temperature and high heat in the direction of the valve body is effectively reduced to prevent the O-ring 14, V-ring 15, and ground portion 18 described later. In addition to providing a measure against heat and heat, the bearing also functions as a bearing that supports both shafts 5a and 5b when extreme vibration occurs.
【表１】 [Table 1]
【００２２】また、このセラミックリング３ｃ，３ｄの
軸端は、ステンレス材（ＳＵＳ）で構成されており、ま
た、このステンレス材が冷却されることも相俟って、熱
衝撃を遮る効果もある。The shaft ends of the ceramic rings 3c and 3d are made of stainless steel (SUS). In addition to the cooling of the stainless steel, there is an effect of blocking thermal shock. .
【００２３】他方、弁回転機構８は、基端側が前記短パ
イプ５及び軸受６内に挿通されて前記弁体３の両弁軸３
ａ，３ｂにそれぞれ接続される上下スピンドル９，１０
と、上スピンドル９の上位にスタンド１１を介して突設
されたオペレータ１２と、下スピンドル１０を回転自在
に支持するパッキングボックス１３とを備えている。On the other hand, the valve rotation mechanism 8 has the base end thereof inserted through the short pipe 5 and the bearing 6 so that the two valve shafts 3 of the valve body 3
Upper and lower spindles 9 and 10 connected to a and 3b respectively
And an operator 12 protruding above the upper spindle 9 via a stand 11, and a packing box 13 for rotatably supporting the lower spindle 10.
【００２４】上下スピンドル９，１０は、ステンレス
（ＳＵＳ）等の適宜素材から形成されており、それぞれ
前記軸受６内に環状プラグ１４とＶ型パッキング１５と
を介して気密に挿着されると共に、同軸受６の解放端に
詰め部材（Shim）１６並びに摩擦防止材（scraper）１
７とを介してドーナツ状のグランド部（gland）１８が
ボルト締めされている。The upper and lower spindles 9 and 10 are made of a suitable material such as stainless steel (SUS) and are hermetically inserted into the bearing 6 via an annular plug 14 and a V-shaped packing 15, respectively. A packing member (Shim) 16 and an anti-friction material (scraper) 1 are provided at the open end of the bearing 6.
A donut-shaped ground (gland) 18 is bolted through the connector 7.
【００２５】因に、このスピンドル９，１０は、図４に
示すように、外周面に螺旋溝９ａを周設して短パイプ５
内に突出する螺合突起５ｂに気密かつ回転可能状態に接
合させるのが良い。As shown in FIG. 4, the spindles 9 and 10 are provided with helical grooves 9a on the outer peripheral surface thereof so that
It is preferable to join the screwing projection 5b projecting inward in an airtight and rotatable state.
【００２６】また、スタンド１１はＳＳ４００等の適宜
素材からなり、取付プレート１９と、ボルト２０を介し
て前記オペレータ１２を着脱自在に螺着している。The stand 11 is made of an appropriate material such as SS400, and has the mounting plate 19 and the operator 12 detachably screwed thereto via bolts 20.
【００２７】オペレータ１２は、縦方向に回転自在な手
動ハンドル１２ａと、該手動ハンドル１２の回転（縦回
転）をスピンドル９の周回転（横回転）に連動する変換
シャフト２１と、該変換シャフト２１とスピンドル９と
を同心状に連結するストッパー２２とを備えている。The operator 12 has a manual handle 12 a rotatable in the vertical direction, a conversion shaft 21 for interlocking the rotation (vertical rotation) of the manual handle 12 with the circumferential rotation (horizontal rotation) of the spindle 9, and a conversion shaft 21. And a stopper 22 for connecting the spindle 9 and the spindle 9 concentrically.
【００２８】因に、このスピンドル９，１０を自動的に
回転させる駆動モータ（図示せず）と制御機構（図示せ
ず）とを付設することにより、同制御機構からの制御信
号によって弁体３を回転駆動させるのが好ましい。この
場合、この手動ハンドル１２ａは駆動モータが故障した
際、手動で弁体３を開閉することができることは云うま
でもない。By providing a drive motor (not shown) for automatically rotating the spindles 9 and 10 and a control mechanism (not shown), the valve 3 is controlled by a control signal from the control mechanism. Is preferably driven to rotate. In this case, it goes without saying that the manual handle 12a can manually open and close the valve body 3 when the drive motor fails.
【００２９】このように構成される本発明のバタフライ
弁は、手動ハンドル１２若しくは駆動モータにより、上
スピンドル９、弁軸３ａを介して弁体３の開閉操作がで
きるものであるが、弁体３の上下両端に配設された弁軸
３ａ，３ｂは、前述した耐熱衝撃性１２００℃の窒化珪
素焼結体からなるセラミックリング３ｃ，３ｄで防温防
熱されているので、高温ガスにより加熱されても焼き付
き等を起こすことがなく、円滑に操作することができる
と共に、弁体方向への高温高熱の流入をも防止するた
め、高炉の休風時に急冷される表面と内部との温度差に
よる弁体３及び弁軸３ａ，３ｂのクラック発生を防止で
きる。The butterfly valve of the present invention thus constructed can open and close the valve body 3 through the upper spindle 9 and the valve shaft 3a by the manual handle 12 or the drive motor. The valve shafts 3a, 3b disposed at both upper and lower ends are heat- and heat-insulated by the above-described ceramic rings 3c, 3d made of a silicon nitride sintered body having a thermal shock resistance of 1200 ° C., so that they are heated by a high-temperature gas. The valve can be operated smoothly without causing seizure, etc., and in order to prevent the inflow of high temperature and high heat in the direction of the valve body, a valve is used due to the temperature difference between the surface and the inside that is rapidly cooled when the blast furnace is shut off. The occurrence of cracks in the body 3 and the valve shafts 3a and 3b can be prevented.
【００３０】尚、本発明に係るリング付きバタフライ弁
は、本実施例に限定されることなく、本発明の目的の範
囲内で自由に設計変更し得るものであり、本発明はそれ
らの全てを包摂するものである。It should be noted that the butterfly valve with a ring according to the present invention is not limited to the present embodiment, but can be freely designed and changed within the scope of the present invention. It is inclusive.
【００３１】例えば、バタフライ弁の周囲をほぼ箱状の
衝撃防止カバー（図示せず）で被装すれば、仮令、衝撃
防止カバーに何等かの衝撃が加わっても、駆動モータや
スピンドル９，１０等に直接伝達されることがないた
め、衝撃に弱いセラミック製の弁体３及び弁軸３ａ，３
ｂを保護することができる。For example, if the periphery of the butterfly valve is covered with a substantially box-shaped impact prevention cover (not shown), the drive motor and the spindles 9 and 10 can be mounted even if any shock is applied to the temporary or impact prevention cover. Etc., so that the ceramic valve body 3 and the valve shafts 3a, 3 are vulnerable to impact.
b can be protected.
【００３２】[0032]
【発明の効果】本発明は上述のように構成され、前記弁
軸が、同弁軸の外周に周設された大径のセラミックリン
グを備えてなり、かつ、該セラミックリングを前記スピ
ンドルの弁軸側及び弁軸を被装するパイプの解放端側を
閉塞すべく同パイプ内に回転自在に介在して前記高温流
体の流路内に位置しないように臨ませてたことによっ
て、セラミックリングそのものが流路内に露呈されるこ
となく前記パイプの解放端側を閉塞し、弁軸方向への高
温高熱の流入を有効的に減滅できるため、従来の如き、
高炉の休風時に急冷される表面と内部との温度差（熱衝
撃）による弁体或いは弁軸のクラック発生を防止するこ
とができるといった効果をも奏するものである。The present invention is constructed as described above, and comprises the valve
Axis, it includes a circumferentially provided by large diameter of the ceramic ring on the outer periphery of the Dobenjiku and the spin of the ceramic ring
Handle the valve stem of the handle and the open end of the pipe that covers the stem.
The high-temperature flow is rotatably interposed in the pipe to close it.
The ceramic ring itself is exposed in the flow path because it is not positioned in the flow path of the body.
The open end side of the pipe is closed and the height in the valve axis direction is
Because the inflow of warm and hot heat can be effectively reduced,
The temperature difference between the surface and the interior that is quenched when the blast furnace
To prevent cracking of the valve body or valve stem
It also has the effect that it can be done .
【００３３】[0033]
【００３４】このように本発明のバタフライ弁は、弁体
方向への高温高熱の流入を防止して休風時における急冷
との温度差によるセラミック弁及び弁軸のクラック発生
を防止できる他、構成が単純であるため、大量生産に適
し価格も低廉なものとして需要者に供給できる等、本発
明を実施することはその実益的価値が甚だ大である。As described above, the butterfly valve according to the present invention can prevent the flow of high temperature and high heat in the direction of the valve body, thereby preventing the ceramic valve and the valve shaft from being cracked due to the temperature difference from the rapid cooling at the time of shutoff. Since the present invention is simple, it can be supplied to a consumer at a low price suitable for mass production, and the practical value of implementing the present invention is enormous.
【図１】本発明に係るバタフライ弁を示す斜視図であ
る。FIG. 1 is a perspective view showing a butterfly valve according to the present invention.
【図２】同バタフライ弁の縦断面図である。FIG. 2 is a vertical sectional view of the butterfly valve.
【図３】本実施例で使用する弁体の斜視図である。FIG. 3 is a perspective view of a valve body used in the present embodiment.
【図４】同弁体とスピンドルとの連結構造を示す説明図
である。FIG. 4 is an explanatory view showing a connection structure between the valve body and a spindle.
【図５】従来のバタフライ弁を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing a conventional butterfly valve.
１ ケーシング ２ 流路 ３ 弁体 ３ａ 第１弁軸 ３ｂ 第２弁軸 ３ｃ セラミックリング ３ｄ セラミックリング ４ 環状フランジ ５ 短パイプ ５ａ 解放端 ５ｂ 螺合突起 ６ 軸受 ７ 内張り ８ 弁回転手段 ９ 上スピンドル ９ａ 螺旋溝 １０ 下スピンドル １１ スタンド １２ オペレータ 12ａ 手動ハンドル １３ パッキングボックス １４ 環状プラグ １５ Ｖ型パッキング １６ 詰め部材（Shim） １７ 摩擦防止材（scraper） １８ グランド部（gland） １９ 取付プレート ２０ ボルト ２１ 変換シャフト ２２ ストッパー Reference Signs List 1 casing 2 flow path 3 valve body 3a first valve shaft 3b second valve shaft 3c ceramic ring 3d ceramic ring 4 annular flange 5 short pipe 5a open end 5b screwing projection 6 bearing 7 lining 8 valve rotating means 9 upper spindle 9a spiral Groove 10 Lower spindle 11 Stand 12 Operator 12a Manual handle 13 Packing box 14 Annular plug 15 V-type packing 16 Packing member (Shim) 17 Anti-friction material (scraper) 18 Ground part (gland) 19 Mounting plate 20 Bolt 21 Conversion shaft 22 Stopper
Claims (1)
弁体と、該弁体に突設された少なくとも一以上の弁軸
と、該弁軸にスピンドル等を介して連動された弁回転手
段とを備えてなるバタフライ弁において、前記弁軸は、
同弁軸の外周に周設された大径のセラミックリングを備
えてなり、かつ、該セラミックリングを前記スピンドル
の弁軸側及び弁軸を被装するパイプの解放端側を閉塞す
べく同パイプ内に回転自在に介在して前記高温流体の流
路内に位置しないように臨ませたことを特徴とする高炉
用バタフライ弁。1. A valve element which is openably and closably disposed within a flow path of a high-temperature fluid, at least one or more valve shafts protruding from the valve element, and interlocked with the valve axis via a spindle or the like. A butterfly valve comprising:
It comprises a large-diameter ceramic ring provided around the outer periphery of Dobenjiku and the spindle the ceramic ring
Close the valve shaft side of the valve and the open end side of the pipe covering the valve shaft.
The high-temperature fluid flow is rotatably
Blast furnace characterized by facing away from the road
For butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11128600A JP3103069B1 (en) | 1999-05-10 | 1999-05-10 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11128600A JP3103069B1 (en) | 1999-05-10 | 1999-05-10 | Butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3103069B1 true JP3103069B1 (en) | 2000-10-23 |
| JP2000320691A JP2000320691A (en) | 2000-11-24 |
Family
ID=14988790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11128600A Expired - Fee Related JP3103069B1 (en) | 1999-05-10 | 1999-05-10 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3103069B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090261A (en) * | 2016-08-23 | 2016-11-09 | 成都欧浦特控制阀门有限公司 | A kind of durable butterfly valve assembly of lower resistance |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241818A (en) * | 2001-02-20 | 2002-08-28 | Azuma Tekko Kk | Hot blast control valve |
| CN105889525B (en) * | 2016-06-22 | 2018-08-28 | 河北科技大学 | A kind of online cleaning type butterfly valve for blast furnace gas pipeline |
| CN107883046B (en) * | 2017-11-26 | 2019-05-17 | 鲍必道 | Volume control device is used in a kind of processing of rare earth |
-
1999
- 1999-05-10 JP JP11128600A patent/JP3103069B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090261A (en) * | 2016-08-23 | 2016-11-09 | 成都欧浦特控制阀门有限公司 | A kind of durable butterfly valve assembly of lower resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000320691A (en) | 2000-11-24 |
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