JPH0536168U - Butterfly valve - Google Patents
Butterfly valveInfo
- Publication number
- JPH0536168U JPH0536168U JP8566791U JP8566791U JPH0536168U JP H0536168 U JPH0536168 U JP H0536168U JP 8566791 U JP8566791 U JP 8566791U JP 8566791 U JP8566791 U JP 8566791U JP H0536168 U JPH0536168 U JP H0536168U
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- JP
- Japan
- Prior art keywords
- valve
- inner cylinder
- valve box
- insulating material
- heat insulating
- 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.)
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- Lift Valve (AREA)
Abstract
(57)【要約】
【目的】 弁箱の冷却によって熱効率を低下させるよう
なことなく、高温に耐え得るようにする。
【構成】 弁箱３の内周に断熱材層４を配設し、この断
熱材層４の内周に耐熱材料から成る内筒５を配設し、弁
箱３を断熱するとともに内筒５にて断熱材が下流に流れ
るのを防止している。また、熱膨張差を吸収するため、
弁箱３の内周のフランジ８と内筒５の外周のフランジ９
を重合させ、ボルト結合して弁箱３と内筒５を連結し、
フランジ８、９の重合面にすべり材を介装している。
(57) [Summary] [Purpose] To withstand high temperatures without lowering thermal efficiency by cooling the valve box. [Structure] A heat insulating material layer 4 is arranged on the inner circumference of the valve box 3, and an inner cylinder 5 made of a heat-resistant material is arranged on the inner circumference of the heat insulating material layer 4 to heat the valve box 3 and to cool the inner cylinder 5 Prevents the heat insulating material from flowing downstream. Also, to absorb the difference in thermal expansion,
Flange 8 on the inner circumference of valve box 3 and flange 9 on the outer circumference of inner cylinder 5
Are superposed and bolted to connect the valve box 3 and the inner cylinder 5,
A sliding material is provided on the overlapping surface of the flanges 8 and 9.
Description
【０００１】[0001]
本考案はバタフライ弁に関し、特に高温ガス流の制御などに用いられる高温用 のバタフライ弁に関するものである。 The present invention relates to a butterfly valve, and more particularly to a butterfly valve for high temperature used for controlling hot gas flow.
【０００２】[0002]
従来、６５０〜７５０°Ｃ程度の高温ガス流の制御に用いられるバタフライ弁 は、図４に示すように、弁箱３１内にその流路を開閉可能な円板状の弁体３２を 配置し、弁体３２を直径方向に貫通する弁棒３３にて弁体３２を開閉回転させる ようにした通常のバタフライ弁と同様の構成であり、それらの材料として所定の 温度と圧力に耐える耐熱材が用いられている。上記のような温度の場合には、比 較的市販性の高い高級材料を用いることによって対応することができた。 Conventionally, a butterfly valve used to control a high-temperature gas flow of about 650 to 750 ° C has a disc-shaped valve body 32 that can open and close its flow path inside a valve box 31, as shown in Fig. 4. The structure is similar to that of a normal butterfly valve in which the valve body 32 is opened and closed by a valve rod 33 penetrating the valve body 32 in the diameter direction, and a heat-resistant material capable of withstanding a predetermined temperature and pressure is used as a material thereof. It is used. In the case of the temperature as described above, it was possible to deal with it by using a high-grade material which is relatively high in marketability.
【０００３】 又、弁棒３３の軸芯位置に形成された冷却通路３５には、対流伝熱，気化熱を 利用するなどして効率的に冷却するためにスチームなどの冷却媒体を流通させて 弁棒３３の強度を保つとともに開閉機構に熱が伝わるのを防止している。In addition, a cooling medium such as steam is circulated in the cooling passage 35 formed at the axial center of the valve rod 33 in order to efficiently cool it by utilizing convective heat transfer and vaporization heat. The strength of the valve rod 33 is maintained and heat is prevented from being transmitted to the opening / closing mechanism.
【０００４】[0004]
ところが、さらに高温高圧のガス流に適用しようとすると、必要強度が材料の 実用的な設計強度の限界を越えてしまうことになるため、断熱あるいは冷却構造 を取り入れた構造とする必要がある。 However, if an attempt is made to apply it to a gas flow of high temperature and high pressure, the required strength will exceed the limit of the practical design strength of the material, so it is necessary to adopt a structure that incorporates a heat insulation or cooling structure.
【０００５】 そこで、弁箱の強度を確保するため、弁箱の内面に断熱材を取付けることが考 えられるが、断熱材が内部流体の流れによって下流に飛ばされる恐れがあるとい う問題を生じ、また弁箱をスチーム冷却するようにすると熱効率が低下してしま うという問題が生起してくる。Therefore, in order to secure the strength of the valve box, it may be considered to attach a heat insulating material to the inner surface of the valve box, but there arises a problem that the heat insulating material may be blown to the downstream by the flow of the internal fluid. In addition, if the valve box is steam-cooled, the thermal efficiency will decrease, causing a problem.
【０００６】 本考案は、上記従来の問題点に鑑み、熱効率を下げることなく高温に耐え得る バタフライ弁を提供することを目的とする。In view of the above conventional problems, an object of the present invention is to provide a butterfly valve that can withstand high temperatures without lowering thermal efficiency.
【０００７】[0007]
本考案は、弁箱の内周に断熱材層を配設し、この断熱材層の内周に耐熱材料か ら成る内筒を配設したことを特徴とする。 The present invention is characterized in that a heat insulating material layer is arranged on the inner circumference of the valve box, and an inner cylinder made of a heat resistant material is arranged on the inner circumference of the heat insulating material layer.
【０００８】 好適には、弁箱内周と内筒外周に突設したフランジを重合させ、ボルト結合し て弁箱と内筒を連結し、さらにフランジの重合面間にすべり材を介装する。[0008] Preferably, the flanges protruding from the inner circumference of the valve box and the outer circumference of the inner tube are overlapped with each other, and the valve box and the inner cylinder are connected by bolt connection, and a sliding member is interposed between the overlapping surfaces of the flanges. ..
【０００９】[0009]
本考案の構成によると、弁箱の内周に断熱材層を配置して弁箱を高温の内部流 体に対して断熱しているので、熱効率を低下することなく弁箱の強度を確保する ことができ、かつ断熱材層の内周に内筒を配置しているので内部流体の流れによ って断熱材が下流に流される恐れもなく、しかも内筒は圧力を支持する強度部材 ではないので内筒の材料として市販性の高い耐熱材料を用いることができる。 According to the configuration of the present invention, since the heat insulating material layer is arranged on the inner circumference of the valve box to insulate the valve box from high temperature internal fluid, the strength of the valve box is ensured without lowering the thermal efficiency. In addition, since the inner cylinder is arranged on the inner circumference of the heat insulating material layer, there is no fear that the heat insulating material will flow downstream due to the flow of the internal fluid, and the inner cylinder is not a strength member that supports pressure. Since there is no such material, a heat-resistant material having high marketability can be used as the material of the inner cylinder.
【００１０】 また、弁箱と内筒をそれぞれから突設したフランジを重合させて連結すること により、弁箱と内筒の熱膨張差を容易に吸収することができ、さらにその重合面 間にすべり材を介装することにより一層円滑に熱膨張差を吸収できる。Further, by connecting the valve box and the inner cylinder by overlapping the flanges protruding from each other, it is possible to easily absorb the difference in thermal expansion between the valve box and the inner cylinder, and between the overlapping surfaces. By interposing the sliding member, the difference in thermal expansion can be absorbed more smoothly.
【００１１】[0011]
以下、本考案の一実施例のバタフライ弁を図１〜図３に基づいて説明する。 １は高温用のバタフライ弁であり、両端外周に接続フランジ２を突設した弁箱 ３の内周に所定厚さの断熱材層４が設けられ、その内周に弁箱３と同芯状に内筒 ５が配設されている。内筒５内の軸芯方向中央位置には弁体６が配設されている 。この弁体６は、弁箱３及び内筒５の軸芯に対して垂直な軸芯回りに回転可能に 支持された弁棒７に固定されている。 Hereinafter, a butterfly valve according to an embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 is a butterfly valve for high temperature, in which a heat insulating material layer 4 having a predetermined thickness is provided on the inner circumference of a valve box 3 having connecting flanges 2 projecting on the outer circumferences of both ends, and is concentric with the valve box 3 on the inner circumference. An inner cylinder 5 is arranged in the. A valve body 6 is arranged at a central position in the inner cylinder 5 in the axial direction. The valve body 6 is fixed to a valve rod 7 rotatably supported around an axis perpendicular to the axes of the valve box 3 and the inner cylinder 5.
【００１２】 弁棒７の軸芯位置から弁箱３及び内筒５の軸芯方向に適当距離の位置において 、弁箱３の内周にフランジ８が突設され、内筒５の外周にこのフランジ８の外側 面に重合するフランジ９が突設されている。これらフランジ８、９は弁棒７の軸 芯から適当距離の位置に突設され、弁箱３及び内筒５の弁棒７貫通部と干渉する ことがないので環状に連続して形成されており、かつそれらの重合面間にすべり 材兼用のガスケット１０が介装されている。これらフランジ８、９はボルトにて 互いに締結されており、これによって内筒５が弁箱３に支持されている。また、 これらフランジ８、９が弁棒７即ち弁体６の軸芯位置から軸芯方向に離れた位置 に形成されていることによって内筒５と弁箱３の熱膨張差によって弁体６と内筒 ５の間で位置ずれを生じることがないようにその重合面は所定の傾斜角のテーパ 面に形成されている。その傾斜角は、弁箱３に対する内筒５の相対的な熱膨張に よるフランジ９の径方向の変位量と弁体６の軸芯位置とフランジ９との間におけ る内筒５の軸芯方向の熱膨張量との比に対応して設定されている。１１は、弁体 ６を内筒５の軸芯に対して垂直な閉位置に回転させたときにその外周縁部が密接 状態で当接するように内筒５の内周に形成された弁座突部である。At a position at an appropriate distance from the axial center position of the valve rod 7 in the axial direction of the valve box 3 and the inner cylinder 5, a flange 8 is projectingly provided on the inner circumference of the valve box 3, and the flange 8 is formed on the outer circumference of the inner cylinder 5. An overlapping flange 9 is provided on the outer surface of the flange 8. These flanges 8 and 9 are provided at a proper distance from the axial center of the valve rod 7, and do not interfere with the valve rod 7 penetrating portion of the valve box 3 and the inner cylinder 5, so they are formed continuously in an annular shape. And a gasket 10 also serving as a sliding material is interposed between the overlapping surfaces. The flanges 8 and 9 are fastened to each other with bolts, and the inner cylinder 5 is supported by the valve box 3 by this. Further, since the flanges 8 and 9 are formed at positions axially distant from the axial center position of the valve rod 7, that is, the valve body 6, the valve body 6 and the valve body 6 are separated from each other due to the difference in thermal expansion between the inner cylinder 5 and the valve box 3. The overlapping surface is formed into a tapered surface with a predetermined inclination angle so that no positional deviation occurs between the inner cylinders 5. The inclination angle is determined by the amount of radial displacement of the flange 9 due to the relative thermal expansion of the inner cylinder 5 with respect to the valve box 3, the axial center position of the valve body 6 and the axis of the inner cylinder 5 between the flange 9. It is set corresponding to the ratio with the thermal expansion amount in the core direction. Reference numeral 11 denotes a valve seat formed on the inner circumference of the inner cylinder 5 so that when the valve body 6 is rotated to a closed position perpendicular to the axis of the inner cylinder 5, the outer peripheral edge portion of the valve body 6 comes into close contact with the inner circumference of the inner cylinder 5. It is a protrusion.
【００１３】 弁箱３の両端内周には、断熱材層４が外部に脱落するのを防止する保持板１２ が突設されている。 弁棒７の軸芯部には、丸穴状の通路の中心部に丸棒又はパイプを配設すること により、流路断面積を小さくした円筒状の冷媒通路１３が形成されている。A holding plate 12 is provided on the inner circumference of both ends of the valve housing 3 so as to prevent the heat insulating material layer 4 from falling out. A cylindrical refrigerant passage 13 having a small flow passage cross-sectional area is formed in the shaft core of the valve rod 7 by disposing a round rod or a pipe at the center of the passage having a round hole shape.
【００１４】 弁棒７は、内筒５の弁棒貫通部に設けられたシールリング１４ａ、１４ｂを貫 通し、さらに弁箱３に設けられた軸受筒部１５ａ、１５ｂを貫通してその両端が 外部に突出している。１６、１７は軸受筒部１５ａ、１５ｂ内に配置された弁棒 ７の軸受部材である。また、軸受筒部１５ａ、１５ｂの外側には弁棒７の外周の 隙間から外部に流体が洩れ出すを防止する軸封装置１８ａ、１８ｂが装着され、 その外周に支持外筒１９ａ、１９ｂが配設されている。弁棒７の一端側の支持外 筒１９ａには開閉駆動手段２０のケーシング２１が固定され、弁棒７の他端側の 支持外筒１９ｂには弁棒７の端部を支持する軸受２２が固定されている。The valve rod 7 penetrates the seal rings 14 a and 14 b provided in the valve rod penetrating portion of the inner cylinder 5, and further penetrates the bearing tubular portions 15 a and 15 b provided in the valve box 3 so that both ends thereof are It projects to the outside. Reference numerals 16 and 17 denote bearing members of the valve rod 7 arranged in the tubular bearing portions 15a and 15b. In addition, shaft sealing devices 18a and 18b that prevent fluid from leaking outside from the gaps on the outer circumference of the valve rod 7 are mounted on the outer sides of the bearing cylindrical portions 15a and 15b, and support outer cylinders 19a and 19b are arranged on the outer circumferences thereof. It is set up. A casing 21 of the opening / closing drive means 20 is fixed to a supporting outer cylinder 19a on one end side of the valve rod 7, and a bearing 22 supporting the end of the valve rod 7 is mounted on the supporting outer cylinder 19b on the other end side of the valve rod 7. It is fixed.
【００１５】 開閉駆動手段２０は、弁棒７に固定されかつ軸受２３を介してケーシング２１ にて回転自在に支持されたボス２４を有する回動レバー２５と、支軸２７にてケ ーシング２１に揺動自在に枢支されたシリンダ装置２６にて構成され、シリンダ 装置２６のピストンロッド先端が回動レバー２５に結合されている。The opening / closing drive means 20 is a rotary lever 25 having a boss 24 fixed to the valve rod 7 and rotatably supported by a casing 21 via a bearing 23, and a support shaft 27 to connect the casing 21 to the casing 21. The cylinder device 26 is swingably supported, and the tip of the piston rod of the cylinder device 26 is connected to the rotating lever 25.
【００１６】 弁棒７の一端には、冷媒通路１３に向けてスチームを供給する手段（図示せず ）が接続されている。 以上の構成において、弁体６はシリンダ装置２６の伸縮動作によって回動レバ ー２５が回動し、弁棒７が回転することによって開閉される。A means (not shown) for supplying steam toward the refrigerant passage 13 is connected to one end of the valve rod 7. In the above configuration, the valve body 6 is opened and closed by the rotation lever 25 being rotated by the expansion and contraction operation of the cylinder device 26 and the valve rod 7 being rotated.
【００１７】 内筒５内を高温流体が流れると、内筒５は高温になるが、弁箱３は断熱材層４ を介在しているのでそれ程高温にはならず、従って市販性の高い適当な材料を用 いても必要な強度を確保することができ、内筒５は高温になるが弁箱３にて流体 圧力のかなりの部分が支持されているので大きな強度は要求されず、そのため市 販性の高い耐熱鋼を用いてもその高温に十分に耐えることができる。又、断熱材 層４の内周に内筒５が存在しているため、流体の流れによって断熱材が下流に流 されるというようなこともない。When a high-temperature fluid flows in the inner cylinder 5, the inner cylinder 5 becomes high in temperature, but since the valve box 3 has the heat insulating material layer 4 interposed therein, the temperature does not become so high. It is possible to secure the required strength even with the use of various materials, and the inner cylinder 5 becomes hot, but since a large part of the fluid pressure is supported by the valve box 3, large strength is not required, and therefore the market Even if a heat-resistant steel with high marketability is used, it can sufficiently withstand the high temperature. Further, since the inner cylinder 5 is present on the inner circumference of the heat insulating material layer 4, the heat insulating material does not flow downstream due to the flow of the fluid.
【００１８】 一方、内筒５と弁箱３の間に断熱材層４が介在されていることによってそれら の間に大きな温度差を生じ、熱膨張差を発生する。弁箱３と内筒５の軸芯方向の 熱膨張差はこのバタフライ弁１に接続される配管との接続部で適宜に吸収するこ とができる。また、内筒５は弁箱３に対して径方向にも相対的に膨張するが、弁 箱３による内筒５の支持構造としてその内周と外周に突設したフランジ８、９を 軸芯方向に重合させてボルト締結した構造としているので、フランジ８、９の重 合面で互いにすべることによりその熱膨張差を吸収することができる。その際に 重合面に介装されたガスケット１０がすべり材として作用することにより、熱膨 張を円滑に吸収でき、局部的に過大な応力が発生したり、内筒５が変形するのを 防止できる。On the other hand, since the heat insulating material layer 4 is interposed between the inner cylinder 5 and the valve box 3, a large temperature difference is generated between them and a thermal expansion difference is generated. The difference in thermal expansion between the valve box 3 and the inner cylinder 5 in the axial direction can be appropriately absorbed at the connecting portion with the pipe connected to the butterfly valve 1. The inner cylinder 5 also expands in the radial direction relative to the valve box 3, but as a structure for supporting the inner cylinder 5 by the valve box 3, flanges 8 and 9 projecting from the inner circumference and the outer circumference of the inner cylinder 5 are used as axial cores. Since the structure is such that the flanges 8 and 9 are overlapped with each other and bolted together, the difference in thermal expansion can be absorbed by sliding the mating surfaces of the flanges 8 and 9. At this time, the gasket 10 interposed on the overlapping surface acts as a sliding material, so that thermal expansion can be smoothly absorbed, and excessive stress is locally generated or the inner cylinder 5 is prevented from being deformed. it can.
【００１９】 さらに、フランジ８、９を弁棒７の軸芯位置からずらせて配置し、全周にわた って連続した環状に形成し、さらにその重合面にガスケット１０を介装している ので、弁箱３と内筒５の間に流れ込んだ流体の流動を完全に防止することができ る。また、フランジ８、９の重合面を上記した所定の傾斜角のテーパー面とした ことによって、熱膨張差により弁箱３の軸受筒部１５ａ、１５ｂと内筒５の弁座 突部１１やシールリング１４ａ、１４ｂの間で芯ずれを生じることがなく、熱膨 張差が発生しても弁体６と弁座突部１１の密接状態が確保されるとともに弁棒７ の円滑な回転が確保される。Further, the flanges 8 and 9 are arranged so as to be displaced from the axial center position of the valve rod 7, and are formed in a continuous annular shape over the entire circumference, and the gasket 10 is interposed on the overlapping surface thereof. It is possible to completely prevent the flow of the fluid flowing between the valve box 3 and the inner cylinder 5. In addition, since the overlapping surfaces of the flanges 8 and 9 are tapered surfaces having the above-described predetermined inclination angles, the bearing cylinder portions 15a and 15b of the valve box 3 and the valve seat protrusion 11 of the inner cylinder 5 and the seals due to the difference in thermal expansion. There is no misalignment between the rings 14a and 14b, and even if a difference in thermal expansion occurs, the valve body 6 and the valve seat protrusion 11 are kept in close contact with each other and the valve rod 7 is smoothly rotated. To be done.
【００２０】 又、弁棒７の軸芯部の冷媒通路１３に冷媒としてスチーム等を供給することに より弁棒７を効果的に冷却することができる。また、その冷媒通路１３を筒状に 形成して伝熱面積を減少することなく流路断面積を小さくしているので、冷却効 果を減ずることなくスチームの消費量を少なくすることができる。Further, the valve rod 7 can be effectively cooled by supplying steam or the like as the refrigerant to the refrigerant passage 13 in the shaft core portion of the valve rod 7. Further, since the refrigerant passage 13 is formed in a tubular shape to reduce the flow passage cross-sectional area without reducing the heat transfer area, it is possible to reduce the steam consumption without reducing the cooling effect.
【００２１】 上記実施例ではフランジ８、９を弁棒７の軸芯位置からずらせて配置し、全周 にわたって連続した環状に形成したが、場合によっては弁棒７の軸芯を通りかつ 内筒５や弁箱３の軸芯に対して垂直な平面上に重合面が位置するようにフランジ ８、９を形成してもよい。その場合、フランジ８、９はシールリング１４ａ、１ ４ｂや軸受筒部１５ａ、１５ｂに干渉しない範囲に部分的に形成される。In the above embodiment, the flanges 8 and 9 are arranged so as to be displaced from the axial center position of the valve rod 7 and formed in a continuous annular shape over the entire circumference. However, depending on the case, the flange 8 and 9 pass through the axial center of the valve rod 7 and the inner cylinder. The flanges 8 and 9 may be formed such that the overlapping surface is located on a plane perpendicular to the axis of the valve 5 and the axis of the valve box 3. In that case, the flanges 8 and 9 are partially formed in a range that does not interfere with the seal rings 14a and 14b and the bearing tube portions 15a and 15b.
【００２２】[0022]
本考案によれば、以上のように、弁箱の内周に断熱材層を配置して弁箱を高温 の内部流体に対して断熱しているので、熱効率を低下することなく弁箱の強度を 確保することができ、かつ断熱材層の内周に内筒を配置しているので内部流体の 流れによって断熱材が下流に流される恐れもなく、しかも内筒は圧力を支持する 強度部材ではないので内筒の材料として市販性の高い耐熱材料を用いることがで きるという効果を発揮する。 According to the present invention, as described above, since the heat insulating material layer is arranged on the inner circumference of the valve box to insulate the valve box from the high temperature internal fluid, the strength of the valve box can be reduced without lowering the thermal efficiency. In addition, since the inner cylinder is arranged on the inner circumference of the heat insulating material layer, there is no fear that the heat insulating material will flow downstream due to the flow of the internal fluid, and the inner cylinder is not a strength member that supports pressure. Since there is no such material, it is possible to use a heat-resistant material having a high marketability as a material for the inner cylinder.
【００２３】 また、弁箱と内筒をそれぞれから突設したフランジを重合させて連結すること により、弁箱と内筒の熱膨張差を容易に吸収することができ、さらにその重合面 間にすべり材を介装することにより一層円滑に熱膨張差を吸収できる等の効果も 発揮する。Further, by connecting the valve box and the inner cylinder by overlapping the flanges protruding from each other, it is possible to easily absorb the difference in thermal expansion between the valve box and the inner cylinder, and between the overlapping surfaces. By interposing a sliding material, the effect of more smoothly absorbing the difference in thermal expansion is also exhibited.
【図１】本考案の一実施例のバタフライ弁の弁棒軸芯に
垂直な縦断面図である。FIG. 1 is a vertical cross-sectional view perpendicular to a stem axis of a butterfly valve according to an embodiment of the present invention.
【図２】同実施例の弁棒軸芯に平行な縦断面図である。FIG. 2 is a vertical cross-sectional view parallel to the valve stem axis of the embodiment.
【図３】同実施例の側面図である。FIG. 3 is a side view of the embodiment.
【図４】従来のバタフライ弁の弁軸に垂直な縦断面図で
ある。FIG. 4 is a vertical cross-sectional view perpendicular to the valve axis of a conventional butterfly valve.
１ バタフライ弁 ３ 弁箱 ４ 断熱材層 ５ 内筒 ８ フランジ ９ フランジ １０ すべり材兼用のガスケット 1 Butterfly valve 3 Valve box 4 Insulating material layer 5 Inner cylinder 8 Flange 9 Flange 10 Gasket also used as a sliding material
Claims (3)
熱材層の内周に耐熱材料から成る内筒を配設したことを
特徴とするバタフライ弁。1. A butterfly valve, wherein a heat insulating material layer is arranged on the inner circumference of a valve box, and an inner cylinder made of a heat resistant material is arranged on the inner circumference of the heat insulating material layer.
を重合させ、ボルト結合して弁箱と内筒を連結したこと
を特徴とするバタフライ弁。2. A butterfly valve, characterized in that flanges projecting from the inner circumference of the valve box and the outer circumference of the inner tube are overlapped with each other and bolted to connect the valve box and the inner tube.
たことを特徴とする請求項２記載のバタフライ弁。3. The butterfly valve according to claim 2, wherein a sliding material is interposed between the overlapping surfaces of the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8566791U JPH0536168U (en) | 1991-10-22 | 1991-10-22 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8566791U JPH0536168U (en) | 1991-10-22 | 1991-10-22 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0536168U true JPH0536168U (en) | 1993-05-18 |
Family
ID=13865178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8566791U Pending JPH0536168U (en) | 1991-10-22 | 1991-10-22 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0536168U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016176490A (en) * | 2015-03-19 | 2016-10-06 | 株式会社クボタ | Pressure reduction valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170082A (en) * | 1982-03-31 | 1983-10-06 | Toshiba Corp | Photocoupler |
| JPS6443871A (en) * | 1987-08-12 | 1989-02-16 | Hitachi Ltd | Pcm signal recorder |
-
1991
- 1991-10-22 JP JP8566791U patent/JPH0536168U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170082A (en) * | 1982-03-31 | 1983-10-06 | Toshiba Corp | Photocoupler |
| JPS6443871A (en) * | 1987-08-12 | 1989-02-16 | Hitachi Ltd | Pcm signal recorder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016176490A (en) * | 2015-03-19 | 2016-10-06 | 株式会社クボタ | Pressure reduction valve |
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