JPH0425565Y2 - - Google Patents
Info
- Publication number
- JPH0425565Y2 JPH0425565Y2 JP12395986U JP12395986U JPH0425565Y2 JP H0425565 Y2 JPH0425565 Y2 JP H0425565Y2 JP 12395986 U JP12395986 U JP 12395986U JP 12395986 U JP12395986 U JP 12395986U JP H0425565 Y2 JPH0425565 Y2 JP H0425565Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- ball
- casing
- hole
- spindle
- 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
- 239000012530 fluid Substances 0.000 claims description 19
- 238000012856 packing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は流体系の流体配管に取り付けて流体通
路を開閉し、流れを制御するボールバルブに関す
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ball valve that is attached to a fluid piping of a fluid system to open and close a fluid passage to control the flow.
ボールバルブは弁ケーシングの内部に配置した
弁ボールを、弁ケーシングを気密的に貫通した弁
軸で回転操作し、弁ボールの入口側あるいは出口
側あるいは出入口側の両方に配置した弁座との協
働で流体通路を開閉するものである。 In a ball valve, a valve ball placed inside a valve casing is rotated by a valve shaft that passes through the valve casing in an airtight manner, and the ball valve cooperates with a valve seat placed on the inlet side, outlet side, or both of the inlet and outlet sides of the valve ball. This is used to open and close the fluid passage.
本考案は特に、弁ボールの流体通路方向への変
位を禁止した、いわゆる弁ボール固定式のボール
バルブの、弁ボールと弁軸および弁座とのシール
構造に関する。 In particular, the present invention relates to a sealing structure between a valve ball, a valve stem, and a valve seat of a so-called valve ball fixed type ball valve that prohibits displacement of the valve ball in the fluid passage direction.
従来の技術
弁ボール固定式のボールバルブは例えば、特公
昭54−26290号公報に示されている。これは、流
体通路を形成する弁ケーシング内に、貫通孔を有
する弁ボールを配置し、弁ボールを回転操作する
弁軸を、弁ケーシングの軸受孔と弁ボールのキー
溝および球心を通る案内孔を貫通させると共にそ
の先端を軸受孔と同軸上に形成した保持孔に嵌合
させ、弁ボールに当接して流体通路の開閉作用を
弁ボールと共に協働するように流体通路内に弁座
を配置し、弁ケーシングと弁軸の間に気密用のパ
ツキングを配置したものである。BACKGROUND ART A ball valve with a fixed valve ball is disclosed, for example, in Japanese Patent Publication No. 54-26290. A valve ball with a through hole is placed in a valve casing that forms a fluid passage, and a valve shaft that rotates the valve ball is guided through a bearing hole in the valve casing, a keyway of the valve ball, and a ball center. A valve seat is inserted into the fluid passage so that the hole is passed through the hole and the tip thereof is fitted into a holding hole formed coaxially with the bearing hole, and the valve seat contacts the valve ball and cooperates with the valve ball to open and close the fluid passage. A gas-tight packing is placed between the valve casing and the valve stem.
この構造のものは、流体圧力が弁ボールに作用
しても、弁ボールを弁軸によつてその球心を通る
軸上で保持することにより一軸上で回転せしめ、
弁軸と弁ボールの偏心によるトルクの増大や弁座
の摩耗を防止せんとしたものである。 With this structure, even if fluid pressure acts on the valve ball, the valve ball is held on the axis passing through its spherical center by the valve shaft, so that it rotates on one axis,
This is intended to prevent torque increase and valve seat wear due to eccentricity between the valve stem and valve ball.
本考案が解決しようとする問題点
しかしながら、上記構造のものでは、流体圧力
が弁ボールに作用すると、弁ボールが僅かに出口
側に変位して弁軸が撓む。この弁軸の撓みによ
り、弁ケーシングと弁軸の間のパツキングがシー
ルできず、流体が漏れる問題がある。Problems to be Solved by the Present Invention However, in the structure described above, when fluid pressure acts on the valve ball, the valve ball is slightly displaced toward the outlet side and the valve shaft is bent. Due to this deflection of the valve stem, the packing between the valve casing and the valve stem cannot be sealed, causing a problem of fluid leakage.
問題点を解決するための手段
上記の問題点を解決するために講じた本考案の
技術的手段は、流体通路を形成する弁ケーシング
内に、貫通孔を有する弁ボールを配置し、弁ボー
ルを回転操作する弁軸を、弁ケーシングの軸受孔
と弁ボールのキー溝および球心を通る案内孔を貫
通させると共にその先端を軸受孔と同軸上に形成
した保持孔に嵌合させ、弁ボールに当接して流体
通路の開閉作用を弁ボールと共に協働するように
流体通路内に弁座を配置し、弁ケーシングと弁軸
の間に気密用のパツキングを配置したもの於い
て、弁軸を、弁ケーシングの軸受孔および弁ボー
ルのキー溝に嵌合するスピンドルと、弁ボールの
案内孔および弁ケーシングの保持孔に嵌合する弁
棒とに分割して形成し、スピンドルの下部に凹部
を設け、凹部内周との間にクリアランスを設けて
弁棒上部を挿入してスピンドルと弁棒とを連結
し、上記クリアランスを弁棒の撓み量よりも僅か
に大きく形成したものである。Means for Solving the Problems The technical means of the present invention taken to solve the above problems is to arrange a valve ball having a through hole in a valve casing that forms a fluid passage. The valve shaft to be rotated is passed through the bearing hole of the valve casing, the keyway of the valve ball, and the guide hole passing through the ball center, and its tip is fitted into the holding hole formed coaxially with the bearing hole, and the valve shaft is inserted into the valve ball. A valve seat is arranged in the fluid passage so as to cooperate with the valve ball to open and close the fluid passage when in contact, and an airtight packing is arranged between the valve casing and the valve stem, and the valve stem is It is divided into a spindle that fits into the bearing hole of the valve casing and the keyway of the valve ball, and a valve stem that fits into the guide hole of the valve ball and the holding hole of the valve casing, and a recess is provided at the bottom of the spindle. The spindle and the valve stem are connected by inserting the upper part of the valve stem with a clearance provided between the inner periphery of the recess and the clearance being slightly larger than the amount of deflection of the valve stem.
作 用 上記の技術的手段の作用は下記の通りである。Effect The operation of the above technical means is as follows.
流体圧力が弁ボールに作用すると、弁ボールが
僅かに出口側に変位して弁軸が撓むが、弁軸をス
ピンドルと弁棒に分割して形成し、スピンドルと
弁棒とを両者の間にクリアランスを設けて連結
し、このクリアランスを弁棒の撓み量よりも僅か
に大きく形成しているので、弁軸が撓んでもスピ
ンドルにはその影響が及ばず、弁ケーシングと弁
軸の間のパツキングから漏れが生じることがな
い。 When fluid pressure acts on the valve ball, the valve ball is slightly displaced toward the outlet side, causing the valve shaft to bend. However, the valve shaft is divided into a spindle and a valve stem, and the spindle and valve stem are separated between the two. This clearance is made slightly larger than the amount of deflection of the valve stem, so even if the valve stem is deflected, the spindle is not affected, and the gap between the valve casing and the valve stem is No leakage occurs from packing.
スピンドルと弁棒の連結部でのクリアランスに
より、弁棒は従来のものよりも変位が大きくなる
が、実験によればトルクの増大や弁座の摩耗は見
られない。 Due to the clearance at the connection between the spindle and the valve stem, the valve stem has a larger displacement than the conventional one, but experiments have shown no increase in torque or wear on the valve seat.
考案の効果 本考案は下記の特有の効果を生じる。Effect of invention The present invention produces the following specific effects.
従来のものでは、３万回前後の開閉操作で弁ケ
ーシングと弁軸との間から漏れが生じていたが、
本考案では、15万回の開閉操作に於いても漏れが
生じることがない。 With the conventional model, leakage occurred between the valve casing and the valve stem after approximately 30,000 opening and closing operations.
With this invention, there will be no leakage even after 150,000 opening and closing operations.
実施例
上記の技術的手段の具体例を示す実施例を説明
する（第１図と第２図参照）。Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1 and FIG. 2).
弁ケーシングは本体１の本体１にねじ結合した
端部材３で形成する。本体１と端部材３に入口４
と出口５および弁室６を設けて流体通路を形成す
る。 The valve casing is formed by an end piece 3 of a body 1 which is threadedly connected to the body 1 . Inlet 4 to main body 1 and end member 3
An outlet 5 and a valve chamber 6 are provided to form a fluid passage.
弁室６内に弁ボール７を回転自在に配置する。
弁ボール７には貫通孔８と案内孔９を直交して形
成し、案内孔９の上部には平行キー溝１０を設け
る。 A valve ball 7 is rotatably arranged within the valve chamber 6.
A through hole 8 and a guide hole 9 are formed perpendicularly in the valve ball 7, and a parallel keyway 10 is provided above the guide hole 9.
弁ボール７の入口４側と出口５側に環状弁座１
１，１２を配置する。両弁座１１，１２はライナ
１３，１４を介して皿バネ１５，１６で弁ボール
７方向に付勢する。両弁座１１，１２の外周にＯ
−リング１７，１８を配置する。 An annular valve seat 1 is provided on the inlet 4 side and the outlet 5 side of the valve ball 7.
Place 1 and 12. Both valve seats 11 and 12 are biased toward the valve ball 7 by disc springs 15 and 16 via liners 13 and 14. O on the outer periphery of both valve seats 11 and 12
- placing the rings 17, 18;
本体１に軸受孔１９を形成し、弁軸を回転自在
に配置する。弁軸は軸受孔１９と弁ボール７のキ
ー溝１０に嵌合するスピンドル２０と弁ボール７
の案内孔９を貫通して本体１の保持孔２２にブツ
シユ２３を介して嵌合する弁棒２１とで形成す
る。スピンドル２０と弁棒２１は第２図に示す様
に、小径のクリアランス２４および大径のクリア
ランス２５を介して連結する。 A bearing hole 19 is formed in the main body 1, and the valve shaft is rotatably arranged. The valve shaft has a bearing hole 19 and a spindle 20 that fits into the keyway 10 of the valve ball 7, and the valve ball 7.
The valve rod 21 passes through the guide hole 9 of the valve body 1 and fits into the holding hole 22 of the main body 1 via a bush 23. As shown in FIG. 2, the spindle 20 and the valve stem 21 are connected through a small diameter clearance 24 and a large diameter clearance 25.
スピンドル２０は弁ケーシングにねじ結合した
ホルダ２６と押え部材２７で飛び出しを防止す
る。スピンドル２０に形成したフランジ２８の外
周から下面にかけてグランド座２９を配置し、そ
の下面に配置したライナ３０および皿バネ３１，
３２でフランジ２８方向に付勢する。ホルダ２６
の下端と弁ケーシングの間にはガスケツト３３を
配置する。フランジ２８の上面とスピンドル２０
の外周にパツキング３４，３５を配置する。参照
番号３６はスベリ管である。 The spindle 20 is prevented from popping out by a holder 26 screwed to the valve casing and a holding member 27. A ground seat 29 is arranged from the outer periphery of the flange 28 formed on the spindle 20 to the lower surface, and a liner 30 and a disc spring 31 are arranged on the lower surface of the ground seat 29.
32 biases toward the flange 28. Holder 26
A gasket 33 is disposed between the lower end of the valve casing and the valve casing. The upper surface of the flange 28 and the spindle 20
Packings 34 and 35 are arranged around the outer periphery of. Reference number 36 is a sliding tube.
第１図は本考案の実施例のボールバルブの断面
図第２図は第１図のスピンドルと弁棒の部分断面
図である。
１……本体、３……端部材、４……入口、５…
…出口、６……弁室、７……弁ボール、８……貫
通孔、１１……入口環状弁座、１２……出口環状
弁座、１９……軸受孔、２０……スピンドル、２
１……弁棒、２２……保持孔、２４，２５……ク
リアランス、３４，３５……パツキング。
FIG. 1 is a sectional view of a ball valve according to an embodiment of the present invention. FIG. 2 is a partial sectional view of the spindle and valve stem of FIG. 1. 1...Main body, 3...End member, 4...Inlet, 5...
... Outlet, 6 ... Valve chamber, 7 ... Valve ball, 8 ... Through hole, 11 ... Inlet annular valve seat, 12 ... Outlet annular valve seat, 19 ... Bearing hole, 20 ... Spindle, 2
1... Valve stem, 22... Holding hole, 24, 25... Clearance, 34, 35... Packing.
Claims (1)
を有する弁ボールを配置し、弁ボールを回転操作
する弁軸を、弁ケーシングの軸受孔と弁ボールの
キー溝および球心を通る案内孔を貫通させると共
にその先端を軸受孔と同軸上に形成した保持孔に
嵌合させ、弁ボールに当接して流体通路の開閉作
用を弁ボールと共に協働するように流体通路内に
弁座を配置し、弁ケーシングと弁軸の間に気密用
のパツキングを配置したもの於いて、弁軸を、弁
ケーシングの軸受孔および弁ボールのキー溝に嵌
合するスピンドルと、弁ボールの案内孔および弁
ケーシングの保持孔に嵌合する弁棒とに分割して
形成し、スピンドルの下部に凹部を設け、凹部内
周との間にクリアランスを設けて弁棒上部を挿入
してスピンドルと弁棒とを連結し、上記クリアラ
ンスを弁棒の撓み量よりも僅かに大きく形成した
ボールバルブ。 A valve ball having a through hole is placed in a valve casing that forms a fluid passage, and a valve shaft that rotates the valve ball passes through a bearing hole in the valve casing, a keyway of the valve ball, and a guide hole that passes through the ball center. and fitting the tip of the valve seat into a holding hole formed coaxially with the bearing hole, and arranging a valve seat within the fluid passage so as to contact the valve ball and cooperate with the valve ball in opening and closing the fluid passage; In cases where airtight packing is arranged between the valve casing and the valve stem, the valve stem is connected to the spindle that fits into the bearing hole of the valve casing and the keyway of the valve ball, and the guide hole of the valve ball and the keyway of the valve casing. A recess is provided at the bottom of the spindle, and the upper part of the valve rod is inserted with a clearance between the inner periphery of the recess and the spindle and the valve rod are connected. , a ball valve in which the above-mentioned clearance is formed to be slightly larger than the amount of deflection of the valve stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12395986U JPH0425565Y2 (en) | 1986-08-11 | 1986-08-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12395986U JPH0425565Y2 (en) | 1986-08-11 | 1986-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6328982U JPS6328982U (en) | 1988-02-25 |
| JPH0425565Y2 true JPH0425565Y2 (en) | 1992-06-18 |
Family
ID=31015537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12395986U Expired JPH0425565Y2 (en) | 1986-08-11 | 1986-08-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425565Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2741217B2 (en) * | 1988-10-05 | 1998-04-15 | 清原 まさ子 | Controller |
-
1986
- 1986-08-11 JP JP12395986U patent/JPH0425565Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6328982U (en) | 1988-02-25 |
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