JPS5924309B2 - butterfly valve - Google Patents
butterfly valveInfo
- Publication number
- JPS5924309B2 JPS5924309B2 JP9108079A JP9108079A JPS5924309B2 JP S5924309 B2 JPS5924309 B2 JP S5924309B2 JP 9108079 A JP9108079 A JP 9108079A JP 9108079 A JP9108079 A JP 9108079A JP S5924309 B2 JPS5924309 B2 JP S5924309B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- flow path
- valve stem
- collar
- annular groove
- 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
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Description
【発明の詳細な説明】
本発明は、弁棒とそれを通すための弁箱側筒状部との間
に、弁箱内に向かって流体を通すための流路を形成する
と共に、その流路からの外部への漏洩を阻止させるため
のグランドバッキング部を設け、そのグランドバッキン
グ部よりも外側に前記弁棒に対する軸受部を設けたバタ
フライ弁に関し、全閉時の洩れ量低下の面、全開時の流
量特性面、強度面、補修面並びに経済面のいずれにおい
ても優れたものを提供せんとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention forms a flow path for passing fluid toward the inside of the valve body between a valve stem and a cylindrical portion on the side of the valve body through which it passes, and Regarding butterfly valves, which are provided with a gland backing part to prevent leakage from the road to the outside, and a bearing part for the valve stem is provided outside the gland backing part, in order to reduce the amount of leakage when fully closed, The aim is to provide products that are excellent in terms of flow rate characteristics, strength, repair, and economy.
次に、本発明実施の態様を例示図に基いて詳述する。Next, embodiments of the present invention will be described in detail based on illustrative drawings.
中空筒状の弁棒１が、その両端側夫々を、弁箱２に形成
された弁箱側筒状部３，３夫々に各別に挿通した状態で
、軸受部４，４を介して回転自在に軸架されると共に、
弁棒１の一端側に弁開閉機構５が連動連結されて、弁体
６の回転に伴い、弁体６周面に付設のシート７を弁箱２
の内周面に設けたシート８に密接及び離間させるべく構
成され、かつ、前記弁棒１と弁箱側筒状部３，３夫々の
間に、軸受部４，４夫々より弁体６側に位置させてグラ
ンドバッキング部９，９が設けられると共に、それより
も更に弁体６側に、スチーム等のパージ流体を通すため
の流路Ｒ１が形成されており、もって、オイル精製に際
してのゼオライトや珪砂（ＳｉＯ□）等の再生に伴って
発生する排ガス等、高温高圧でダストを含むガスの輸送
経路に適用するに好適なバタフライ弁が構成されている
。A hollow cylindrical valve stem 1 is freely rotatable via bearing parts 4, 4 with its both ends inserted into valve body side cylindrical parts 3, 3 formed in a valve body 2, respectively. Along with being mounted on a shaft,
A valve opening/closing mechanism 5 is interlocked with one end of the valve stem 1, and as the valve body 6 rotates, a seat 7 attached to the circumferential surface of the valve body 6 is moved around the valve body 2.
The seat 8 provided on the inner circumferential surface of Ground backing portions 9, 9 are provided, and a flow path R1 for passing a purge fluid such as steam is formed further on the valve body 6 side than the ground backing portions 9, 9. The butterfly valve is suitable for application to a transport route for gases containing dust at high temperature and pressure, such as exhaust gas generated during the regeneration of silica sand (SiO□) and the like.
前記グランドバッキング部９，９夫々は、弁棒１の長手
方向において分割されており、そして、分割グランドバ
ッキング部９ａ、９ｂ夫々の間に軸受部材１０が嵌装さ
れ、弁棒１を弁箱２に対して、両軸受部４，４及び両軸
受部材１０，１０の４点で支持するべく構成されている
。The gland backing parts 9, 9 are each divided in the longitudinal direction of the valve stem 1, and a bearing member 10 is fitted between the divided gland backing parts 9a, 9b, respectively, and the valve stem 1 is connected to the valve body 2. However, it is configured to be supported at four points: both bearing parts 4, 4 and both bearing members 10, 10.
前記軸受部材１０，１０夫々の弁棒１に摺接する箇所゛
ど、弁棒１の軸受部材１０，１０に対応する箇所夫々に
、溶接によりステライト等の盛金１１．１１が備えられ
、かつ、弁箱側筒状部３に穿設形成の貫通孔３ａを介し
てグリス供給路Ｒ２が連通接続されると共に、軸受部材
１０の内外周面に穿設形成した環状溝１２，１３及び両
溝１２゜１３を連通するべく周方向４箇所に穿設された
貫通孔１４・・・・・・を介して弁棒１と軸受部材１０
，１０との摺接箇所にグリスを供給するべく構成され、
弁棒１と軸受部材１０．１０夫々の焼付きを防止すると
共にグランドバッキング部９，９によるシール性を高め
るべく構成されている。The bearing members 10, 10 are each provided with a filler metal 11, 11 made of stellite or the like by welding at a location corresponding to the bearing member 10, 10 of the valve stem 1, such as a location where the bearing member 10, 10 comes into sliding contact with the valve stem 1, and A grease supply path R2 is connected to the valve box side cylindrical portion 3 through a through hole 3a, and annular grooves 12, 13 and both grooves 12 are formed on the inner and outer peripheral surfaces of the bearing member 10. The valve stem 1 and the bearing member 10 are connected through through holes 14 bored at four locations in the circumferential direction to communicate with each other.
, 10, and is configured to supply grease to sliding contact points with , 10,
It is constructed to prevent seizure of the valve stem 1 and bearing members 10 and 10, respectively, and to improve the sealing performance of the ground backing parts 9, 9.
前記パージ流体を供給するに、内外周面夫々に環状溝１
５，１６を穿設形成されると共に周方向６箇所に前記両
溝１５，１６を連通ずる貫通孔１７・・・・・・を穿設
されたパージリング１８が、弁箱側筒状部３と弁棒１と
の間に、外周溝１６と前記流路Ｒ１を連通ずる状態で設
けられ、弁棒１及びそれを囲繞するべく設けたカラー１
９と、弁箱側筒状部３を囲繞するべく内嵌したブツシュ
２０間の隙間により形成される流路Ｒを通じてパージ流
体を弁箱２内に供給し、グランドバッキング部９及び軸
受部材１０側へのダストの侵入を防止すると共に輸送流
体から遮熱するべく構成されている。In order to supply the purge fluid, an annular groove 1 is provided on each of the inner and outer circumferential surfaces.
A purge ring 18 is provided with through holes 17 formed at six locations in the circumferential direction to communicate the grooves 15 and 16. A collar 1 is provided between the valve stem 1 and the valve stem 1 so as to communicate the outer circumferential groove 16 and the flow path R1, and the collar 1 is provided to surround the valve stem 1 and the valve stem 1.
9 and a bushing 20 fitted inside to surround the valve box side cylindrical part 3. Purge fluid is supplied into the valve box 2 through the flow path R formed by the gap between the bushing 20 and the gland backing part 9 and the bearing member 10 side. It is configured to prevent dust from entering the tank and to provide thermal insulation from the transport fluid.
前記供給路Ｒ１と外周環状溝１６とを連通接続するに、
第３図に示すように、弁箱側筒状部３の周方向所定箇所
に貫通孔２１を穿設し、その貫通孔２１に外周溝１６を
連通させる状態でパージリング１８が内嵌されている。To communicate and connect the supply path R1 and the outer circumferential annular groove 16,
As shown in FIG. 3, a through hole 21 is bored at a predetermined circumferential position of the valve box side cylindrical portion 3, and the purge ring 18 is fitted inside the through hole 21 with the outer circumferential groove 16 communicating with the through hole 21. There is.
そして、前記貫通孔２１に対してパージリング１８の貫
通孔１７・・・・・・が周方向に相違する状態で位置さ
れており、前記供給路Ｒ１からのパージ流体を貫通孔２
１、環状溝１６及び貫通孔１７・・・・・・を通じて周
方向全周にわたって均一な状態で前記流路Ｒに連通供給
していくべく構成されている。The through holes 17 .
1. The annular groove 16 and the through hole 17 are configured to be uniformly supplied to the flow path R over the entire circumference in the circumferential direction.
前記弁棒１の内部には、その一端側を入口２２とすると
共に他端側と出口２３として冷却空気を流動させるべく
構成され、弁棒１を冷却するべく構成されている。Inside the valve rod 1, one end is used as an inlet 22 and the other end and an outlet 23 are configured to allow cooling air to flow, thereby cooling the valve rod 1.
前記弁体６の軸受部４側端部に凹部２４が形成されると
共に、その凹部２４の外表面が、ステライト材料の盛金
溶接により形成される弁体側シート７を延設して被覆さ
れ、そして、カラー１９が、その一端側が前記凹部２４
に内嵌密接されて径方向の位置定めをする状態で、かつ
、他端側が弁棒１に形成された段部２５に接当する状態
で弁棒１に外嵌されると共に、カラー１９の内周面と弁
棒１の外周面との間に隙間りが形成されており、弁棒１
の弁体６側近くにおいて、ダスト及びパージ流体から弁
棒１を保護すると共に、前記隙間りをして、弁棒１に対
し、輸送流体からの断熱空間を形成するべく構成されて
いる。A recess 24 is formed at the end of the valve body 6 on the side of the bearing 4, and the outer surface of the recess 24 is covered with an extending valve body side sheet 7 formed by metal welding of stellite material, The collar 19 has one end thereof connected to the recess 24.
The collar 19 is fitted onto the valve stem 1 in a state in which it is closely fitted inside to determine the position in the radial direction, and in a state in which the other end side is in contact with a stepped portion 25 formed on the valve stem 1. A gap is formed between the inner circumferential surface and the outer circumferential surface of the valve stem 1.
Near the valve body 6 side, the valve stem 1 is protected from dust and purge fluid, and the gap is formed to form an insulating space for the valve stem 1 from transport fluid.
前記弁箱側筒状部３の内側開口端部近くに、弁箱側筒状
部３に形成の段部２６により弁体６側への移動を規制す
る状態でブツシュ２０が内嵌され、弁箱側筒状部３の弁
体６に近い箇所において、ダスト及びパージ流体から弁
箱側筒状部３を保護するべく構成され、かつ、ブツシュ
２０の弁体６側端部の内周面が、ステライト材料の盛金
溶接により形成される弁箱側シート８を延設して被覆さ
れ、カラー１９との間の隙間を小さくしてダストの侵入
を阻止しやすいようにすると共に前記流路Ｒが絞られて
パージ流体の流速が犬となってダストの排除を良好に行
えるように、かつ、流速増大に伴うブツシュ２０の弁体
６側端部の侵食を抑制するように構成されている。A bushing 20 is fitted near the inner opening end of the valve box side cylindrical portion 3 in such a manner that movement toward the valve body 6 is restricted by a stepped portion 26 formed on the valve box side cylindrical portion 3. A portion of the box-side cylindrical portion 3 near the valve body 6 is configured to protect the valve body-side cylindrical portion 3 from dust and purge fluid, and the inner circumferential surface of the bushing 20 at the valve body 6 side end is The valve body side sheet 8 formed by metal welding of Stellite material is extended and covered, and the gap with the collar 19 is reduced to easily prevent dust from entering, and the flow path R is is constricted so that the flow rate of the purge fluid becomes a dog, so that dust can be removed well, and erosion of the end of the bushing 20 on the side of the valve body 6 due to an increase in the flow rate is suppressed.
前記カラー１９とそれに連なる弁棒１の前記流路Ｒ側の
面に、タングステンカーバイド等の高温耐摩耗性に優れ
た金属被膜２７が備えられており、弁棒１及びカラー１
９がパージ流体により侵食されるのを防止するべく構成
されている。A metal coating 27 having excellent high-temperature wear resistance, such as tungsten carbide, is provided on the flow path R side surface of the collar 19 and the valve stem 1 connected thereto.
9 from being eroded by the purge fluid.
尚、前記パージリング１８に貫通孔１７・・・・・・を
穿設するのに、６個に限らず、例えば３個あるいは４個
等、要するに、周方向に分散して設けてあれば良く、複
数個以上設けるものであれば良い。Note that the number of through holes 17 to be bored in the purge ring 18 is not limited to six, but may be three or four, for example, as long as they are distributed in the circumferential direction. , as long as a plurality or more are provided.
以上要するに本発明は、冒記したバクフライ弁において
、前記グランドバッキング部９を前記弁棒１の長手方向
において分割構成して、その分割グランドバッキング部
９ａ 、９ｂ間に軸受部材１０を嵌装し、その軸受部材
１０に、内外両周面に位置させた環状溝１２．１３とそ
の両環状溝１２．１３を連通する貫通孔１４を形成し、
前記軸受部材１０外周面の環状溝１３にグリスを供給す
る貫通孔３ａを前記弁箱側筒状部３に形成し、少なくと
も前記弁箱側筒状部３の内側開口端部近くにおいて、前
記弁棒１をカラー１９によって、かつ、前記弁箱側筒状
部３をブツシュ２０によって夫々囲繞させて、前記流路
Ｒを前記カラー１９とブツシュ２０の間に形成し、前記
カラー１９の一端側を弁体６に形成の凹部２４に内装さ
せると共に、前記弁棒１とカラー１９の間に隙間りを形
成し、前記カラー１９の前記流路Ｒ側の面に、高温耐摩
耗性に優れた金属被膜２７を備えさせ、外周面に環状溝
１６をかつ周方向複数箇所にぞσ環状溝１６と前記流路
Ｒを連通ずる貫通孔１７・・・・・・を備えたパージリ
ング１８を、前記弁箱側筒状部３に、その貫通孔２１と
前記環状溝１６を連通させる状態でかつ、両者の貫通孔
２１，１７・・・・・・の位置が周方向において相違す
る状態で内嵌させである事を特徴とする。In summary, the present invention provides the aforementioned backfly valve in which the gland backing portion 9 is divided in the longitudinal direction of the valve stem 1, and the bearing member 10 is fitted between the divided gland backing portions 9a and 9b. In the bearing member 10, an annular groove 12.13 located on both the inner and outer circumferential surfaces and a through hole 14 communicating with both the annular grooves 12.13 are formed,
A through hole 3a for supplying grease to the annular groove 13 on the outer peripheral surface of the bearing member 10 is formed in the valve box side cylindrical part 3, and at least near the inner opening end of the valve box side cylindrical part 3, the valve The rod 1 is surrounded by a collar 19 and the valve box side cylindrical part 3 is surrounded by a bushing 20, so that the flow path R is formed between the collar 19 and the bushing 20, and one end side of the collar 19 is surrounded by a bushing 20. The valve element 6 is fitted with a recess 24 formed in the valve body 6, a gap is formed between the valve stem 1 and the collar 19, and the surface of the collar 19 on the flow path R side is coated with a metal having excellent high-temperature wear resistance. The purge ring 18 is provided with a coating 27, an annular groove 16 on the outer circumferential surface, and through holes 17 at multiple locations in the circumferential direction that communicate the σ annular groove 16 with the flow path R. It is fitted into the valve box side cylindrical part 3 in a state in which the through hole 21 and the annular groove 16 are communicated with each other, and the positions of the through holes 21, 17, . . . are different in the circumferential direction. It is characterized by being seductive.
つまり、グランドバッキング部９を分割し、その分割グ
ランドバッキング部９ａ 、９ｂ間に軸受部材１０を嵌
装し、弁棒１に対する軸受部間距離を小にすると共に、
弁棒１を両軸受部４，４と両軸受部材１０，１０により
４点で支持させるから、全閉時に弁体６にかかる流体圧
に起因する弁棒１の撓み変形を抑制でき、全閉時のシー
ル性を向上できると共に撓み変形に起因するパージ流体
供給量の増大を回避し、供給量を必要最小限に抑えてパ
ージ流体供給のための動力損失及びパージ流体による侵
食を抑制でき、かつ、撓み変形抑制のために弁棒１を大
径化する場合に比べ、全開時の流量特性を極めて良好に
できるに至った。That is, the gland backing part 9 is divided, and the bearing member 10 is fitted between the divided gland backing parts 9a and 9b, thereby reducing the distance between the bearing parts with respect to the valve stem 1.
Since the valve stem 1 is supported at four points by both bearing parts 4, 4 and both bearing members 10, 10, it is possible to suppress the bending deformation of the valve stem 1 caused by the fluid pressure applied to the valve body 6 when fully closed. It is possible to improve the sealing performance when the purge fluid is supplied, avoid an increase in the amount of purge fluid supplied due to flexural deformation, and suppress the supply amount to the minimum necessary to suppress power loss for supplying the purge fluid and erosion caused by the purge fluid. Compared to the case where the diameter of the valve stem 1 is increased to suppress bending deformation, the flow rate characteristics when fully opened can be made extremely good.
又、軸受部材１０−＼のグリス供給により、軸受部材１
０の摩損を抑制できると共にグランドバッキング部９，
９の流体に対するシール性を向上できるに至った。Also, by supplying grease to the bearing member 10-\, the bearing member 1
0 can be suppressed and the ground backing part 9,
It has now been possible to improve the sealing performance against the fluid of No. 9.
更に、ダストが侵入しやすく、かつ、パージ流体による
影響を受けやすい、弁箱側筒状部３の内側開口端部近く
において、弁棒１を、弁体６の凹部２３にまで入込ませ
たカラー１９により、他方、弁箱側筒状部３をブツシュ
２０により夫々囲繞させるから、弁棒１及び弁箱側筒状
部３夫々自体の、ダストによる摩損並びにパージ流体に
よる侵食を回避でき、かつ、補修に際してカラー１９及
びブツシュ２０を交換しさえすれば良く、弁棒１及び弁
箱側筒状部３を補修交換するのに比べ、補修を容易に行
えると共に極めて安価で経済性有利にできるに至った。Further, the valve stem 1 is inserted into the recess 23 of the valve body 6 near the inner open end of the valve box side cylindrical part 3, where dust easily enters and is easily affected by the purge fluid. On the other hand, since the valve body side cylindrical part 3 is surrounded by the bush 20 by the collar 19, wear and tear caused by dust and erosion by the purge fluid of the valve stem 1 and the valve body side cylindrical part 3 themselves can be avoided, and When repairing, it is only necessary to replace the collar 19 and the bushing 20, and compared to repairing and replacing the valve stem 1 and the valve body side cylindrical part 3, the repair can be easily performed and is extremely inexpensive and economically advantageous. It's arrived.
その上、カラー１９に金属被膜２７を備えさせるから、
カラー１９の上述摩損並びに侵食を抑制でき、補修回数
の低減を図れるに至った。Moreover, since the collar 19 is provided with the metal coating 27,
The above-mentioned wear and tear and erosion of the collar 19 can be suppressed, and the number of repairs can be reduced.
しかも、カラー１９と弁棒１との間に隙間りを設けるか
ら、その隙間りをして、弁棒１を輸送流体から断熱でき
、弁棒１が輸送流体からの伝熱に起因して長手方向に伸
縮され、弁体６と弁箱２の相対位置にズレを生じてシー
ル性を低下するといった事を抑制できるに至った。Moreover, since a gap is provided between the collar 19 and the valve stem 1, the valve stem 1 can be insulated from the transportation fluid by the gap, and the valve stem 1 can be This makes it possible to prevent the valve body 6 and the valve body 2 from being expanded and contracted in the same direction, causing a shift in the relative position of the valve body 6 and the valve body 2, and thereby reducing the sealing performance.
そして、パージ流体を供給するに、パージリング１８に
形成の複数の貫通孔１７・・・・・・を通じ、弁棒１の
周方向複数箇所から供給するようにするから、弁棒１の
周方向全周にわたって均一な状態で供給でき、前述弁棒
１の撓み変形抑制との協働により、より一層、ダスト排
除に要するパージ流体供給量を抑える事ができ、パージ
流体供給のための動力損失を低減できると共に、パージ
流体の流速を抑えて高速流動に起因するカラー１９及び
ブツシュ２０の侵食を抑制できるに至り、全体として、
全閉時のシール面、全開時の流動特性面、強度面、補修
面並びに経済面のいずれにおいても優れたバタフライ弁
を提供できるに至った。The purge fluid is supplied from a plurality of locations in the circumferential direction of the valve stem 1 through the plurality of through holes 17 formed in the purge ring 18. The purge fluid can be supplied in a uniform state all around the circumference, and in cooperation with the above-mentioned suppression of bending deformation of the valve stem 1, the amount of purge fluid supplied required for removing dust can be further suppressed, and the power loss for supplying the purge fluid can be reduced. In addition, it has become possible to suppress the flow rate of the purge fluid and suppress erosion of the collar 19 and bushing 20 caused by high-speed flow, and as a whole,
We have now been able to provide a butterfly valve that is excellent in terms of sealing when fully closed, flow characteristics when fully open, strength, repair, and economy.
図面は本発明に係るバタフライ弁の実施の態様を例示し
、第１図は一部破断図、第２図は要部の拡大断面図、第
３図は第１図のＩ−１線断面図、第４図は第２図の要部
の拡大図である。
１・・・・・−弁棒、２・・・・・・弁箱、計・・・・
・弁箱側筒状部、３ａ、２１・・・・・・貫通孔、４・
・・・・・軸受部、９・・・・・・グランドバッキング
部、９ａ、９ｂ・・・・・・分割グランドバッキング部
、１０・・・・・・軸受部材、１２，１３・・・・・・
軸受部材の環状溝、１４・・・・・・軸受部材の貫通孔
、１６・・・・・・パーシリングの環状溝、１７・・・
・・・パージリングの貫通孔、１８・・・・・・パージ
リング、１９・・・・・・カラー、２０・・・・・・ブ
ツシュ、２４・・・・・・凹部、２７・・・・・・金属
被膜、Ｒ・・・・・・流路、Ｌ・・・・・・隙間。The drawings illustrate embodiments of the butterfly valve according to the present invention, in which FIG. 1 is a partially cutaway view, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is a sectional view taken along line I-1 in FIG. 1. , FIG. 4 is an enlarged view of the main part of FIG. 2. 1...-valve stem, 2...valve box, total...
・Valve box side cylindrical part, 3a, 21...Through hole, 4・
...Bearing part, 9...Ground backing part, 9a, 9b...Divided ground backing part, 10...Bearing member, 12, 13...・・・
Annular groove of bearing member, 14... Through hole of bearing member, 16... Annular groove of persilling, 17...
... Purge ring through hole, 18... Purge ring, 19... Collar, 20... Bush, 24... Concavity, 27... ...Metal coating, R...Flow path, L...Gap.
Claims (1)
、弁箱２内に向かって流体を通すための流路Ｒを形成す
ると共に、その流路Ｒからの外部への漏洩を阻止させる
ためのグランドバッキング部９を設け、そのグランドバ
ッキング部９よりも外側に前記弁棒１に対する軸受部４
を設けたバタフライ弁であって、前記グランドバッキン
グ部９を前記弁棒１の長手方向において分割構成して、
その分割グランドバッキング部９ａ 、９ｂ間に軸受部
材１０を嵌装し、その軸受部材１０に、内外両局面に位
置させた環状溝１２，１３とその両環状溝１２，１３を
連通する貫通孔１４を形成し、前記軸受部材１０外周面
の環状溝１３にグリスを供給する貫通孔３ａを前記弁箱
側筒状部３に形成し、少なくとも前記弁箱側筒状部３の
内側開口端部近くにおいて、前記弁棒１をカラー１９に
よって、かつ、前記弁箱側筒状部３をブツシュ２０によ
って夫々囲繞させて、前記流路Ｒを前記カラー１９とブ
ツシュ２０の間に形成し、前記カラー１９の一端側を弁
体６に形成の凹部２４に内嵌させると共に、前記弁棒１
とカラー１９の間に隙間りを形成し、前記カラー１９の
前記流路Ｒ側の面に、高温耐摩耗性に優れた金属被膜２
７を備えさせ、外周面に環状溝１６をかつ周方向複数箇
所にその環状溝１６と前記流路Ｒを連通ずる貫通孔１７
・・・・・・を備えたパージリング１８を、前記弁箱側
筒状部、３に、その貫通孔２１と前記環状溝１６を連通
させる状態でかつ両者の貫通孔２１，１７・・・・・・
の位置が周方向において相違する状態で内嵌させである
事を特徴とするバタフライ弁。1 A flow path R for passing fluid toward the inside of the valve body 2 is formed between the valve stem 1 and the valve body side cylindrical portion 3 through which it passes, and a flow path R for passing fluid from the flow path R to the outside is formed. A gland backing part 9 is provided to prevent leakage of the valve stem 1, and a bearing part 4 for the valve stem 1 is provided outside the gland backing part 9.
A butterfly valve is provided with a structure in which the gland backing portion 9 is divided in the longitudinal direction of the valve stem 1,
A bearing member 10 is fitted between the divided gland backing portions 9a and 9b, and an annular groove 12, 13 located on both the inner and outer surfaces of the bearing member 10 and a through hole 14 communicating between the annular grooves 12, 13 are provided. A through hole 3a for supplying grease to the annular groove 13 on the outer peripheral surface of the bearing member 10 is formed in the valve box side cylindrical part 3, at least near the inner opening end of the valve box side cylindrical part 3. , the valve stem 1 is surrounded by a collar 19 and the valve box side cylindrical part 3 is surrounded by a bushing 20, so that the flow path R is formed between the collar 19 and the bushing 20, and the collar 19 is surrounded by a bushing 20. One end side is fitted into the recess 24 formed in the valve body 6, and the valve stem 1
A gap is formed between the collar 19 and the flow path R side, and a metal coating 2 having excellent high temperature abrasion resistance is formed on the surface of the collar 19 on the flow path R side.
7, an annular groove 16 on the outer peripheral surface, and through holes 17 communicating the annular groove 16 and the flow path R at a plurality of locations in the circumferential direction.
A purge ring 18 having... is connected to the valve box side cylindrical portion 3 in a state where its through hole 21 communicates with the annular groove 16, and the through holes 21, 17 of both are connected. ...
1. A butterfly valve characterized in that the positions of the butterfly valves are internally fitted at different positions in the circumferential direction.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108079A JPS5924309B2 (en) | 1979-07-17 | 1979-07-17 | butterfly valve |
| US06/167,021 US4353388A (en) | 1979-07-12 | 1980-07-09 | Butterfly valve |
| DE3026382A DE3026382C2 (en) | 1979-07-12 | 1980-07-11 | Flap valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9108079A JPS5924309B2 (en) | 1979-07-17 | 1979-07-17 | butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5614677A JPS5614677A (en) | 1981-02-12 |
| JPS5924309B2 true JPS5924309B2 (en) | 1984-06-08 |
Family
ID=14016526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9108079A Expired JPS5924309B2 (en) | 1979-07-12 | 1979-07-17 | butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5924309B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0477425U (en) * | 1990-11-20 | 1992-07-07 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343564C (en) * | 2006-03-27 | 2007-10-17 | 三门尔格科技有限公司 | Novel metal butterfly valve seal method |
| JP2009185982A (en) * | 2008-02-08 | 2009-08-20 | Nissan Motor Co Ltd | On-off valve, fuel cell system, and control method of fuel cell system |
-
1979
- 1979-07-17 JP JP9108079A patent/JPS5924309B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0477425U (en) * | 1990-11-20 | 1992-07-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5614677A (en) | 1981-02-12 |
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