JPS6346771Y2 - - Google Patents
Info
- Publication number
- JPS6346771Y2 JPS6346771Y2 JP18463883U JP18463883U JPS6346771Y2 JP S6346771 Y2 JPS6346771 Y2 JP S6346771Y2 JP 18463883 U JP18463883 U JP 18463883U JP 18463883 U JP18463883 U JP 18463883U JP S6346771 Y2 JPS6346771 Y2 JP S6346771Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- shaft
- valve plate
- valve body
- gas flow
- 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
- 239000000919 ceramic Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 description 12
- 230000037431 insertion Effects 0.000 description 6
- 238000003780 insertion Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Blast Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【考案の詳細な説明】
本考案は、セラミツクス製弁体を有する高温用
のバタフライ弁に関する。[Detailed Description of the Invention] The present invention relates to a high temperature butterfly valve having a ceramic valve body.
製鉄用高炉の羽口からは例えば温度1200℃、圧
力3.5Kg／cm2（ゲージ圧）の高温高圧の圧縮空気
が例えば120ｍ／秒という高い流速で吹込まれ、
かつ、こうした羽口が高炉に約20個もとりつけら
れている。そして、かかる高温高圧高流速の空気
の流量を羽口毎にそれぞれ独立に制御する弁が望
まれている。 From the tuyere of a steelmaking blast furnace, high temperature, high pressure compressed air with a temperature of 1200°C and a pressure of 3.5 kg/cm 2 (gauge pressure) is blown at a high flow rate of 120 m/sec, for example.
Moreover, about 20 such tuyeres are installed in the blast furnace. There is a demand for a valve that can independently control the flow rate of such high-temperature, high-pressure, high-flow rate air for each tuyere.
従来、このような目的のために金属製弁体を有
する弁の採用が試みられたが、弁体の耐熱性が不
足して実用に耐えず、一方金属製弁体を水冷する
ことも試みられたが熱損失が大きくこれも実用に
耐えなかつた。そこで、本考案者らは、弁体の弁
板と弁軸とをセラミツクスで一体に形成し、この
弁体を耐熱性のケーシング内に収容するようにし
たバタフライ弁を提案した。このバタフライ弁
は、高温高圧高流速の空気等の流量制御に用いて
も充分な耐熱性および強度が得られる。 In the past, attempts have been made to use valves with metal valve bodies for this purpose, but the heat resistance of the valve bodies is insufficient, making them impractical.On the other hand, attempts have also been made to water-cool the metal valve bodies. However, the heat loss was so large that it was not practical. Therefore, the present inventors proposed a butterfly valve in which the valve plate and valve stem of the valve body are integrally formed of ceramics, and the valve body is housed in a heat-resistant casing. This butterfly valve has sufficient heat resistance and strength even when used to control the flow rate of air at high temperature, high pressure, and high flow velocity.
ところで、このバタフライ弁においては、弁を
全閉にした状態すなわち弁板をガス流に対して直
角に支持した状態で、弁板には最大の応力が作用
する。ここで弁体がセラミツクスでできているの
で、高温高圧のガス流に耐えられる強度を有する
ようにするためには、弁板の厚さを金属製の弁体
に比べてかなり厚くする必要がある。しかし、弁
板が厚くなると、弁を全開にした状態すなわち弁
板をガス流に対して平行に支持した状態で、ガス
流の圧力損失が無視できないほど大きくなる。し
かも、従来一般的な弁体においては、弁板の外周
の対称な二箇所から弁軸が外方に突出し、この弁
軸に由来するガス流の圧力損失もかなり大きいも
のであつた。 By the way, in this butterfly valve, the maximum stress acts on the valve plate when the valve is fully closed, that is, when the valve plate is supported at right angles to the gas flow. Since the valve body is made of ceramics, the thickness of the valve plate needs to be considerably thicker than that of a metal valve body in order to have the strength to withstand the high temperature and high pressure gas flow. . However, when the valve plate becomes thick, the pressure loss of the gas flow becomes so large that it cannot be ignored when the valve is fully open, that is, when the valve plate is supported parallel to the gas flow. Moreover, in conventional valve bodies, the valve stem protrudes outward from two symmetrical locations on the outer periphery of the valve plate, and the pressure loss of the gas flow originating from the valve stem is also quite large.
したがつて、本考案の目的は、弁を全閉にした
際にもセラミツクス製弁体はガス流の圧力に耐え
られる強度を有し、かつ、弁を全開にした際、ガ
ス流の圧力損失ができるだけ少なくなるようにし
たバタフライ弁を提供することにある。 Therefore, the purpose of the present invention is to ensure that the ceramic valve body has the strength to withstand the pressure of the gas flow even when the valve is fully closed, and to reduce the pressure loss of the gas flow when the valve is fully opened. The object of the present invention is to provide a butterfly valve in which the amount of damage is reduced as much as possible.
本考案は、セラミツクス製弁体がケーシングの
流体流路内に回転自在に支持されてなるバタフラ
イ弁において、前記弁体は弁板と弁軸から成り、
弁軸は弁板の外周の一箇所から外方に突出し、弁
軸の軸線に沿つた弁板の厚さは弁軸の取付け部か
ら遠ざかるにしたがつて薄くなるように形成され
ていることを特徴とする高温用のバタフライ弁で
ある。 The present invention provides a butterfly valve in which a ceramic valve body is rotatably supported within a fluid flow path of a casing, the valve body comprising a valve plate and a valve shaft,
The valve stem projects outward from one point on the outer periphery of the valve plate, and the thickness of the valve plate along the axis of the valve stem becomes thinner as it moves away from the attachment point of the valve stem. This is a butterfly valve for high temperatures.
したがつて、ガス流の圧力によつて弁板にかか
る応力が最も大きい弁軸の取付け部において弁板
が厚く形成され、弁板にかかる応力が最も小さい
弁板の先端部において弁板が薄く形成されている
ので、弁の全開時には、ガス流の圧力損失をでき
るだけ少なくすると共に、弁の全閉時にも、必要
とされる強度が保持されることになる。さらに弁
軸は弁板の一箇所に取付ければよいので、弁軸に
起因するガス流の圧力損失も大幅に低減される。 Therefore, the valve plate is thicker at the attachment point of the valve stem, where the stress applied to the valve plate by the pressure of the gas flow is greatest, and the valve plate is thinner at the tip of the valve plate, where the stress applied to the valve plate is least. As a result, the pressure loss of the gas flow is minimized when the valve is fully open, and the required strength is maintained even when the valve is fully closed. Furthermore, since the valve stem only needs to be attached to one location on the valve plate, pressure loss in the gas flow caused by the valve stem is also significantly reduced.
また従来の弁板は弁軸方向のみならず、弁軸に
直交する方向においてもほぼ等厚の円盤形状をな
しているため、弁の全開時に、ガス流のはがれ現
象が生じ、予想以上に大きな圧力損失が生じてい
る。そこ本考案においては、弁板の弁軸に直交す
る断面形状は、一端が丸められた紡錘形となるよ
うに形成されていることが好ましい。このように
すれば、弁板の断面形状は全体としていわゆる流
線形をなすので、弁を全開にする状態、すなわち
弁板をガス流と平行にする際に、ガス流の上流側
に紡錘形断面形状の丸められた端部を位置せしめ
ることにより、弁板のまわりを通過するガス流に
渦や淀みができにくく、ガス流の圧力損失をさら
に低減できることとなる。 In addition, because conventional valve plates have a disk shape with approximately the same thickness not only in the direction of the valve shaft but also in the direction perpendicular to the valve shaft, when the valve is fully opened, the gas flow peels off, resulting in a larger than expected Pressure loss is occurring. Therefore, in the present invention, it is preferable that the cross-sectional shape of the valve plate perpendicular to the valve axis is formed into a spindle shape with one end rounded. In this way, the cross-sectional shape of the valve plate as a whole forms a so-called streamlined shape, so when the valve is fully open, that is, when the valve plate is parallel to the gas flow, a spindle-shaped cross-sectional shape is formed on the upstream side of the gas flow. By locating the rounded end of the valve plate, vortices and stagnation are less likely to occur in the gas flow passing around the valve plate, and the pressure loss of the gas flow can be further reduced.
なお、弁板の断面形状は必ずしも厳密な流線形
をなす必要はなく、流線形に近い形状であれば充
分な効果が発揮される。 It should be noted that the cross-sectional shape of the valve plate does not necessarily have to be strictly streamlined, and a sufficient effect can be achieved as long as it has a shape close to streamlined.
以下、本考案の実施例を図面を参照して説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図および第２図に示すように、本考案を実
施したバタフライ弁１は弁体２とこの弁体２を収
容したケーシング３とを有する。弁体２はセラミ
ツクスで一体に形成された弁板２ａと弁軸２ｂと
からなつている。したがつてこの弁体２は両者を
接着やビス止めなどにより接続されている場合に
比べて製作が容易であり、かつ、接続部位への応
力集中も少ない。 As shown in FIGS. 1 and 2, a butterfly valve 1 embodying the present invention has a valve body 2 and a casing 3 housing the valve body 2. As shown in FIGS. The valve body 2 consists of a valve plate 2a and a valve shaft 2b integrally formed of ceramics. Therefore, this valve body 2 is easier to manufacture than when the two are connected by adhesive or screws, and there is less stress concentration on the connecting portion.
また、ケーシング３は開口端縁にフランジ４，
４を有する金属カバー５と、この金属カバー５の
内側に二層に張られた耐火材６ａ，６ｂからなる
断熱層６とからなつており、内部に流体流路７が
形成されている。ケーシング３の外周壁から流体
流路７に向けて弁体挿入口８が形成され、この弁
体挿入口８にプラグ８が挿入されている。 The casing 3 also has a flange 4 on the opening edge.
4, and a heat insulating layer 6 made of two layers of refractory materials 6a and 6b stretched inside the metal cover 5, and a fluid flow path 7 is formed inside. A valve body insertion port 8 is formed from the outer peripheral wall of the casing 3 toward the fluid flow path 7, and a plug 8 is inserted into this valve body insertion port 8.
プラグ９は軸孔１０を有し、この軸孔１０に弁
軸２ｂが挿通されている。軸孔１０の流体流路７
における開口縁内周にはブツシユ１１が装着され
ている。プラグ９は耐火断熱材からなり、ブツシ
ユ１１は高強度セラミツクス例えば炭化珪素、窒
化珪素などからなつている。このブツシユ１１は
弁軸２ｂを軸孔１０内の所定位置に保持するとと
もに、高温のガス流からの輻射熱が継手１９の方
に放出されることをも遮断している。プラグ９
は、外周がやや先細になつたテーパー状をなし、
全体として円錐台形状をなしている。弁体挿入口
８は弁体２の弁板２ａが挿入できる幅を有し、プ
ラグ９と弁体挿入口８の内周との間にはセラミツ
クスフアイバー等のシール材１２が介在してい
る。プラグ９は図示せぬアンカーボルトによつて
金属製フランジ１４に取付けられ、さらに金属製
フランジ１４はその外周を円筒１５およびリング
１７に図示せぬボルトにより締結されている。円
筒１５は一端を金属カバー５に溶接されており、
したがつてプラグ９は金属製フランジ１４および
円筒１５を介してケーシング３に固定されてい
る。円筒１５の外周には水冷ジヤケツト１６が形
成されている。さらにリング１７には軸筒１８の
下端フランジ部が同じく図示せぬボルトによつて
固着されている。弁軸２ｂは軸孔１０を通つて金
属製フランジ１４の外側に突出し、継手１９によ
つて軸２０に連結されている。さらに、軸２０は
軸筒１８内に設けられたユニバーサルジヨイント
２１を介して軸２２に連結されている。また軸筒
１８の側周には水冷ジヤケツト２３が形成され、
軸筒１８の外側端部にはフレム２４が設置されて
いる。そして、軸２２はフレーム２４内に設けら
れた継手２５を介して電動モータ２６の駆動軸に
連結されている。 The plug 9 has a shaft hole 10, into which the valve shaft 2b is inserted. Fluid flow path 7 of shaft hole 10
A bush 11 is attached to the inner periphery of the opening edge. The plug 9 is made of a refractory heat insulating material, and the bush 11 is made of a high strength ceramic such as silicon carbide or silicon nitride. This bushing 11 holds the valve shaft 2b in a predetermined position within the shaft hole 10, and also blocks radiant heat from the high temperature gas flow from being released toward the joint 19. Plug 9
has a tapered shape with a slightly tapered outer circumference,
The overall shape is a truncated cone. The valve body insertion port 8 has a width that allows the valve plate 2a of the valve body 2 to be inserted therein, and a sealing material 12 such as ceramic fiber is interposed between the plug 9 and the inner periphery of the valve body insertion port 8. The plug 9 is attached to a metal flange 14 by an anchor bolt (not shown), and the outer periphery of the metal flange 14 is fastened to a cylinder 15 and a ring 17 by bolts (not shown). The cylinder 15 has one end welded to the metal cover 5,
The plug 9 is therefore fixed to the casing 3 via the metal flange 14 and the cylinder 15. A water cooling jacket 16 is formed around the outer periphery of the cylinder 15. Furthermore, the lower end flange portion of the shaft cylinder 18 is fixed to the ring 17 with bolts (not shown). The valve shaft 2b projects outside the metal flange 14 through the shaft hole 10 and is connected to the shaft 20 by a joint 19. Further, the shaft 20 is connected to a shaft 22 via a universal joint 21 provided within the shaft cylinder 18. Further, a water cooling jacket 23 is formed on the side periphery of the shaft cylinder 18.
A frame 24 is installed at the outer end of the shaft tube 18. The shaft 22 is connected to a drive shaft of an electric motor 26 via a joint 25 provided within the frame 24.
そして、本考案において弁体２の弁板２ａは、
第３図に示すように、正面から見てほぼ円盤状を
なし、外周の一箇所から弁軸２ｂが突設されてい
る。そして、第４図に示すように、弁板２ａは側
方から見ると弁軸２ｂの軸線に沿つて弁軸２ｂの
取付け部から遠ざかるにしたがつて薄くなるよう
に形成されている。さらに、第５図ないし第７図
に示すように、弁板２ａの弁軸２ｂに直交する断
面形状は、一端２ｃが丸められた紡錘形となるよ
うに形成されている。すなわち、弁板２ａの断面
形状は、いわゆる流線形またはそれに近い形状を
なしている。 In the present invention, the valve plate 2a of the valve body 2 is
As shown in FIG. 3, it has an approximately disk shape when viewed from the front, and a valve shaft 2b protrudes from one location on the outer periphery. As shown in FIG. 4, the valve plate 2a is formed to become thinner as it goes away from the mounting portion of the valve shaft 2b along the axis of the valve shaft 2b when viewed from the side. Furthermore, as shown in FIGS. 5 to 7, the cross-sectional shape of the valve plate 2a perpendicular to the valve shaft 2b is formed into a spindle shape with one end 2c rounded. That is, the cross-sectional shape of the valve plate 2a has a so-called streamlined shape or a shape close to it.
上記の構成において、電動モータ２６を作動さ
せて駆動軸を回転させると、継手２５、軸２２、
ユニバーサルジヨイント２１、軸２０および継手
１９を介して弁軸２ｂが回転し、これによつて流
体流路７内で弁板２ａの角度を変え、流量制御を
行なうことができる。弁体２はセラミツクスで一
体に形成されており、かつ、ケーシング３は内側
に断熱層６が設けられているので、流体流路７内
に高温のガスが流通しても充分に耐熱、断熱性が
保持される。 In the above configuration, when the electric motor 26 is operated to rotate the drive shaft, the joint 25, the shaft 22,
The valve shaft 2b rotates via the universal joint 21, the shaft 20, and the joint 19, thereby changing the angle of the valve plate 2a within the fluid flow path 7 and controlling the flow rate. The valve body 2 is integrally formed of ceramics, and the casing 3 is provided with a heat insulating layer 6 on the inside, so even if high temperature gas flows in the fluid flow path 7, it has sufficient heat resistance and heat insulation. is retained.
そして、本考案においては、第４図に示すよう
に、弁軸２ｂの軸線に沿つた弁板２ａの厚さが弁
軸２ｂの取付け部から遠ざかるにしたがつて薄く
形成されているので、弁の全閉時においてもガス
流の圧力に充分耐えられる強度が保持されると共
に、弁の全開時にはガス流の圧力損失は少なくな
るようにされている。さらに、弁軸２ｂが弁板２
ａの外周の一箇所に取付けられ、弁板２ａを片持
ち的に支持するようにしているので、弁軸２ｂに
よるガス流の圧力損失も少なくなつている。その
うえ、弁を全開にして弁軸２ａをガス流に対して
平行にした際、その丸められた一端２ｃがガス流
の上流側を向くように位置せしめることにより、
弁板２ａのガス流に沿つた断面形状がほぼ流線形
をなしているので、ガス流の圧力損失はさらに少
なくなつている。 In the present invention, as shown in FIG. 4, the thickness of the valve plate 2a along the axis of the valve shaft 2b becomes thinner as it goes away from the mounting part of the valve shaft 2b. Even when the valve is fully closed, it maintains sufficient strength to withstand the pressure of the gas flow, and when the valve is fully open, the pressure loss of the gas flow is reduced. Furthermore, the valve shaft 2b is connected to the valve plate 2.
Since the valve plate 2a is attached to one location on the outer periphery of the valve plate 2a to support the valve plate 2a in a cantilevered manner, the pressure loss of the gas flow due to the valve shaft 2b is also reduced. Furthermore, when the valve is fully opened and the valve shaft 2a is parallel to the gas flow, by positioning it so that its rounded end 2c faces the upstream side of the gas flow,
Since the cross-sectional shape of the valve plate 2a along the gas flow is substantially streamlined, the pressure loss of the gas flow is further reduced.
これらの結果として、ガス流の圧力損失は、ほ
ぼ等厚の円盤形状をなす弁板の場合に比べて数分
の１に減少させることができる。 As a result of these, the pressure loss of the gas flow can be reduced to a fraction of that in the case of a disk-shaped valve plate of approximately equal thickness.
なお、組立に際し、弁体２をケーシング３内に
収容するには、弁体２の弁軸２ｂをプラグ９の軸
孔１０に挿通し、プラグ９を弁体２と共に弁体挿
入口８内に挿入し、弁板２ａを流体流路７内に配
置する。その場合、プラグ９と弁体挿入口８との
間にはシール材１２を介在させる。。次に、金属
製フランジ１４をプラグ９の外側端面に装着し、
アンカーボルトで締付け固定する。そして、弁軸
２ｂに継手１９を介して軸２０を連結し、軸２０
にユニバーサルジヨイント２１を介して軸２２を
連結する。次に、リング１７を金属製フランジ１
４とともに円筒１５にボルト締めし、さらに軸筒
１８をリング１７にボルト締めする。最後に、軸
２２を継手２５によつて電動モータ２６の駆動軸
に連結する。 In addition, in order to accommodate the valve body 2 in the casing 3 during assembly, the valve stem 2b of the valve body 2 is inserted into the shaft hole 10 of the plug 9, and the plug 9 is inserted into the valve body insertion port 8 together with the valve body 2. and place the valve plate 2a in the fluid flow path 7. In that case, a sealing material 12 is interposed between the plug 9 and the valve body insertion port 8. . Next, the metal flange 14 is attached to the outer end surface of the plug 9,
Tighten and secure with anchor bolts. Then, the shaft 20 is connected to the valve shaft 2b via the joint 19, and the shaft 20
A shaft 22 is connected to the shaft 22 via a universal joint 21. Next, the ring 17 is attached to the metal flange 1.
4 to the cylinder 15, and further bolt the shaft cylinder 18 to the ring 17. Finally, the shaft 22 is connected to the drive shaft of an electric motor 26 by a joint 25.
また、弁体２をケーシング３内から取出す場合
には、継手２５を緩めて軸筒１８をリング１７か
ら取外し、電動モータ２６、フレーム２４、軸筒
１８を一体に引き抜く。さらに、取付けボルトを
緩めてリング１７を取外す。この状態で、弁体
２、プラグ９、金属製フランジ１４、継手１９、
軸２０、ユニバーサルジヨイント２１および軸２
２を一体に引き抜くことによつて弁体２を取出す
ことができる。 Moreover, when the valve body 2 is taken out from inside the casing 3, the joint 25 is loosened, the shaft cylinder 18 is removed from the ring 17, and the electric motor 26, frame 24, and shaft cylinder 18 are pulled out together. Furthermore, loosen the mounting bolts and remove the ring 17. In this state, the valve body 2, the plug 9, the metal flange 14, the joint 19,
Shaft 20, universal joint 21 and axis 2
The valve body 2 can be taken out by pulling out the valve body 2 as a whole.
以上説明したように、本考案によれば、弁軸は
弁板の外周の一箇所から外方に突出し、弁軸の軸
線に沿つた弁板の厚さは弁軸の取付け部から遠ざ
かるにしたがつて薄くなるように形成されている
ので、弁の全閉時にもガス流の圧力に耐えること
ができ、弁の全開時にもガス流の圧力損失をでき
るだけ少なくすることができ、もつてセラミツク
ス製弁体を有するバタフライ弁の性能をさらに向
上させることができる。 As explained above, according to the present invention, the valve stem protrudes outward from one point on the outer periphery of the valve plate, and the thickness of the valve plate along the axis of the valve stem is such that it becomes farther away from the mounting part of the valve stem. Since it is formed to be thinner and thinner, it can withstand the pressure of the gas flow even when the valve is fully closed, and it can minimize the pressure loss of the gas flow even when the valve is fully open. The performance of a butterfly valve having a valve body can be further improved.
第１図は本考案の一実施例を示すバタフライ弁
の正面断面図、第２図は同実施例の側面断面図、
第３図は同実施例で用いられる弁体を取出して示
す正面図、第４図は同弁体の側面図、第５図は第
３図における−線に沿つた断面図、第６図は
第３図における−線に沿つた断面図、第７図
は第３図における−線に沿つた断面図であ
る。
図中、１はバタフライ弁、２は弁体、２ａは弁
板、２ｂは弁軸、３はケーシング、７は流体流路
である。
Fig. 1 is a front sectional view of a butterfly valve showing an embodiment of the present invention, and Fig. 2 is a side sectional view of the same embodiment.
FIG. 3 is a front view showing the valve body used in the same embodiment, FIG. 4 is a side view of the same valve body, FIG. 5 is a sectional view taken along the - line in FIG. 3, and FIG. 3 is a sectional view taken along the - line, and FIG. 7 is a sectional view taken along the - line in FIG. 3. In the figure, 1 is a butterfly valve, 2 is a valve body, 2a is a valve plate, 2b is a valve shaft, 3 is a casing, and 7 is a fluid flow path.
Claims (1)
に回転自在に支持されてなるバタフライ弁におい
て、前記弁体は弁板と弁軸から成り、弁軸は弁板
の外周の一箇所から外方に突出し、弁軸の軸線に
沿つた弁板の厚さは弁軸の取付け部から遠ざかる
にしたがつて薄くなるように形成されていること
を特徴とする高温用のバタフライ弁。 In a butterfly valve in which a ceramic valve body is rotatably supported within a fluid flow path of a casing, the valve body is composed of a valve plate and a valve stem, and the valve stem projects outward from a point on the outer periphery of the valve plate. A butterfly valve for high temperature use, characterized in that the thickness of the valve plate along the axis of the valve stem becomes thinner as it goes away from the mounting part of the valve stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18463883U JPS6093073U (en) | 1983-12-01 | 1983-12-01 | Butterfly valve for high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18463883U JPS6093073U (en) | 1983-12-01 | 1983-12-01 | Butterfly valve for high temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093073U JPS6093073U (en) | 1985-06-25 |
| JPS6346771Y2 true JPS6346771Y2 (en) | 1988-12-05 |
Family
ID=30399292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18463883U Granted JPS6093073U (en) | 1983-12-01 | 1983-12-01 | Butterfly valve for high temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041533A1 (en) * | 1998-02-10 | 1999-08-19 | Nkk Corporation | High-temperature high-pressure liquid flow control valve and method of preventing fixing of its stem |
-
1983
- 1983-12-01 JP JP18463883U patent/JPS6093073U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041533A1 (en) * | 1998-02-10 | 1999-08-19 | Nkk Corporation | High-temperature high-pressure liquid flow control valve and method of preventing fixing of its stem |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6093073U (en) | 1985-06-25 |
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