JPH07139640A - Shut-off valve - Google Patents
Shut-off valveInfo
- Publication number
- JPH07139640A JPH07139640A JP28886993A JP28886993A JPH07139640A JP H07139640 A JPH07139640 A JP H07139640A JP 28886993 A JP28886993 A JP 28886993A JP 28886993 A JP28886993 A JP 28886993A JP H07139640 A JPH07139640 A JP H07139640A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- bearing bush
- grease
- valve shaft
- actuator
- 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.)
- Granted
Links
Landscapes
- Control Of Turbines (AREA)
- Lift Valve (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、板状の弁体と弁座とに
より流体、特に腐食性流体の流路の開閉を行なう遮断弁
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shut-off valve which opens and closes a flow passage for a fluid, particularly a corrosive fluid, by means of a plate-shaped valve body and a valve seat.
【０００２】[0002]
【従来の技術】地熱蒸気，ガス又は化学薬品のような腐
食性流体の流路を開閉する弁として回動する弁軸に取付
けた板状の弁体を有し、弁軸を支持する軸受部に腐食防
止や潤滑のためグリスを注入するチェック形遮断弁やバ
タフライ弁のような遮断弁が知られている。以下図面を
用いて従来技術について説明する。2. Description of the Related Art A bearing portion having a plate-shaped valve element attached to a valve shaft that rotates as a valve for opening and closing a flow path of a corrosive fluid such as geothermal steam, gas or chemicals, and supporting the valve shaft. There are known shut-off valves such as check-type shut-off valves and butterfly valves that inject grease for corrosion prevention and lubrication. The related art will be described below with reference to the drawings.
【０００３】図３は遮断弁としてのチェック形遮断弁の
断面図、図４は図３のＡ−Ａ矢視断面図である。図３，
図４において、弁箱１は流体入口２と流体出口３とを備
え、弁蓋４は弁箱１の開口を閉鎖し、スタッド５，ナッ
ト６により弁箱１に取付けられている。弁座７は流体出
口３の入口に設けられている。円板状の弁体８は中央部
に副弁座９を備えた円形状の流路孔１０を有し、アーム
１１を介して弁軸１２に回動自在に取付けられている。
副弁体１３は弁体８の副弁座９に着座し、アーム１４に
ナット１５により締結され、アーム１４はキー１６によ
り弁軸１２に固定されている。FIG. 3 is a sectional view of a check type shutoff valve as a shutoff valve, and FIG. 4 is a sectional view taken along the line AA of FIG. Figure 3,
In FIG. 4, the valve box 1 has a fluid inlet 2 and a fluid outlet 3, and a valve lid 4 closes the opening of the valve box 1 and is attached to the valve box 1 by studs 5 and nuts 6. The valve seat 7 is provided at the inlet of the fluid outlet 3. The disc-shaped valve body 8 has a circular flow passage hole 10 having a sub-valve seat 9 in the center, and is rotatably attached to the valve shaft 12 via an arm 11.
The sub valve body 13 is seated on the sub valve seat 9 of the valve body 8 and fastened to the arm 14 by the nut 15, and the arm 14 is fixed to the valve shaft 12 by the key 16.
【０００４】ここで、アーム１１は図４に示すようにア
ーム１４の両側に弁軸１２に回動自在に取付けられ、さ
らに両側のアーム１１はアーム１４と距離ｄ（図３参
照）を持たせたコ形の橋板１７で結合されている。な
お、両側のアーム１１とアーム１４とは弁軸１２を囲む
ライナ１８を介して弁軸１２に取付けられている。カバ
ー１９は弁軸１２を回動させる図示しないアクチュエー
タ側で、一方エンドカバー２０は反アクチュエータ側で
弁箱１の端部にカラー２１を介して挿入され、スタッド
２２，ナット２３により弁箱１に取付けられている。弁
軸１２のジャーナル部２４，２４ａはカバー１９及びエ
ンドカバー２０内にそれぞれ設置される軸受ブッシュ２
７に支持され、カバー１９及びエンドカバー２０と弁軸
１２との間には、それぞれパッキンブッシュ２５，２５
ａとワッシャ２６，２６ａが設置されている。The arm 11 is rotatably attached to the valve shaft 12 on both sides of the arm 14 as shown in FIG. 4, and the arms 11 on both sides are separated from the arm 14 by a distance d (see FIG. 3). It is connected by a bridge U-shaped bridge 17. The arms 11 and 14 on both sides are attached to the valve shaft 12 via a liner 18 that surrounds the valve shaft 12. The cover 19 is on the side of an actuator (not shown) that rotates the valve shaft 12, while the end cover 20 is on the side opposite to the actuator and is inserted into the end of the valve box 1 via a collar 21. Installed. The journal portions 24, 24a of the valve shaft 12 are bearing bushes 2 installed in the cover 19 and the end cover 20, respectively.
7, the packing bushes 25, 25 are respectively provided between the valve shaft 12 and the cover 19 and the end cover 20.
a and washers 26, 26a are installed.
【０００５】ここで、弁軸１２の左側のジャーナル部２
４の端部は図示しないグランドパッキンを介してアクチ
ュエータの作動軸に連結し、一方弁軸１２の右側のジャ
ーナル部２４ａの端部は開放されているので、弁箱１内
の流体の外部への漏洩を防止するためにエンドカバー２
０により弁軸１２のジャーナル部２４ａ及び軸受ブッシ
ュ２７の端面を覆っている。なお、２８はシールリング
である。Here, the journal portion 2 on the left side of the valve shaft 12
The end of 4 is connected to the operating shaft of the actuator via a gland packing (not shown), while the end of the right journal portion 24a of the valve shaft 12 is open, so that the fluid in the valve box 1 is not exposed to the outside. End cover 2 to prevent leakage
0 covers the journal 24 a of the valve shaft 12 and the end surface of the bearing bush 27. In addition, 28 is a seal ring.
【０００６】ここで、軸受ブッシュ２７には腐食性流体
による腐食防止と、弁軸１２が回動する際の潤滑のため
グリスが流れる通路としてその側壁を貫通する複数の孔
２９と、これらの孔２９に連通して軸受ブッシュ２７を
貫通する通路孔３０が設けられている。なお、軸受ブッ
シュ２７には図５に示すように軸受ブッシュ２７の外面
と内面とをそれぞれ囲んで設けられ、複数の孔２９の両
端部に連通する環状の溝３１，３１ａが設けられてい
る。Here, the bearing bush 27 is provided with a plurality of holes 29 penetrating its side wall as passages through which grease flows to prevent corrosion by a corrosive fluid and to lubricate when the valve shaft 12 rotates, and these holes 29. A passage hole 30 communicating with 29 and penetrating the bearing bush 27 is provided. As shown in FIG. 5, the bearing bush 27 is provided so as to surround the outer surface and the inner surface of the bearing bush 27, and is provided with annular grooves 31 and 31 a communicating with both ends of the plurality of holes 29.
【０００７】カバー１９，エンドカバー２０にはグリス
を注入する注入路３３，３３ａが貫通して設けられてい
る。そして、アクチュエータ側の軸受ブッシュ２７の端
面が接するカバー１９には、軸受ブッシュ２７の通路孔
３０に連通する環状の溝３４が設けられている。一方、
反アクチュエータ側の軸受ブッシュ２７の通路孔３０
は、弁軸１２のジャーナル部２４ａ及び軸受ブッシュ２
７の端面と、エンドカバー２０とで画成される端部室３
５を介して注入路３３ａに連通している。Injection paths 33 and 33a for injecting grease are provided through the cover 19 and the end cover 20. An annular groove 34 communicating with the passage hole 30 of the bearing bush 27 is provided in the cover 19 with which the end surface of the bearing bush 27 on the actuator side contacts. on the other hand,
Passage hole 30 of bearing bush 27 on the side opposite to the actuator
Is the journal portion 24a of the valve shaft 12 and the bearing bush 2
The end chamber 3 defined by the end surface 7 and the end cover 20.
5 and communicates with the injection path 33a.
【０００８】なお、注入路３３，３３ａにはそれぞれ配
管３６と止め弁３７とグリスニップル３８とが接続され
ている。このような構成により、遮断弁には、グリスニ
ップル３８にグリス供給源からの配管を接続し、止め弁
３７を開にしてグリスポンプによりグリスをカバー１
９，エンドカバー２０の各注入路３３，３３ａを経て各
軸受ブッシュ２７に供給する。この際、アクチュエータ
側の軸受ブッシュ２７には、注入路３３からのグリスが
カバー１９とジャーナル部２４との隙間を経て環状の溝
３４から軸受ブッシュ２７の通路孔３０を経て孔２９に
流入し、環状の溝３１，３１ａを流れて軸受ブッシュ２
７とカバー１９及びジャーナル部２４との両隙間に充填
される。A pipe 36, a stop valve 37, and a grease nipple 38 are connected to the injection passages 33 and 33a, respectively. With such a configuration, the shutoff valve is connected to the grease nipple 38 from the grease supply source, the stop valve 37 is opened, and the grease is covered by the grease pump.
9, through the injection passages 33, 33a of the end cover 20 to supply the bearing bush 27. At this time, in the bearing bush 27 on the actuator side, the grease from the injection passage 33 flows into the hole 29 from the annular groove 34 through the passage hole 30 of the bearing bush 27 through the gap between the cover 19 and the journal portion 24, The bearing bush 2 flows through the annular grooves 31 and 31a.
7 and the cover 19 and the journal portion 24 are filled in the gaps.
【０００９】一方、反アクチュエータ側の軸受ブッシュ
２７には、注入路３３ａからのグリスが端部室３５を充
填した後、軸受ブッシュ２７の通路孔３０を経て孔２９
から環状の溝３１，３１ａを流れて、軸受ブッシュ２７
とジャーナル部２４ａ及びエンドカバー２０との両隙間
に充填される。このようにしてグリスを充填した後遮断
弁の開閉が行なわれる。遮断弁の閉は、図３に示すよう
にアクチュエータの駆動により軸受ブッシュ２７にて支
持された弁軸１２の回動により、弁軸１２に取付けられ
たアーム１１，１４を介して弁体８を弁座７に着座させ
るとともに、副弁体１３を弁体８の副弁座９に着座させ
て行なわれ、腐食性流体の流路は閉になる。On the other hand, the bearing bush 27 on the side opposite to the actuator fills the end chamber 35 with grease from the injection passage 33a, and then passes through the passage hole 30 of the bearing bush 27 to form the hole 29.
Flow through the annular grooves 31, 31a from the bearing bush 27.
And the gap between the journal portion 24a and the end cover 20 is filled. After the grease is filled in this way, the shutoff valve is opened and closed. As shown in FIG. 3, the shut-off valve is closed by rotating the valve shaft 12 supported by the bearing bush 27 by driving the actuator to move the valve body 8 through the arms 11 and 14 attached to the valve shaft 12. The valve seat 7 is seated, and the sub-valve body 13 is seated on the sub-valve seat 9 of the valve body 8 to close the flow path of the corrosive fluid.
【００１０】次に遮断弁の閉状態から開にするときに
は、アクチュエータの駆動により弁軸１２を回動すれば
アーム１４により、まず副弁体１３が開になって、流体
の小量を遮断弁内に流して弁体８の前後にかかる差圧を
小さくする。そしてアーム１４がアーム１１の橋板１７
に当った後、アーム１１により弁体８を全開にする。な
お、弁体８と副弁体１３との開状態は図３の一点鎖線で
示される。Next, when the shut-off valve is opened from the closed state, the valve shaft 12 is rotated by driving the actuator, and the arm 14 first opens the sub-valve body 13 to open a small amount of fluid. The pressure difference that flows inside the valve body 8 is reduced. And the arm 14 is the bridge plate 17 of the arm 11.
After hitting, the valve body 8 is fully opened by the arm 11. The open state of the valve body 8 and the sub-valve body 13 is shown by a dashed line in FIG.
【００１１】[0011]
【発明が解決しようとする課題】グリスポンプでグリス
を注入路３３，３３ａを経てアクチュエータ側、及び反
アクチュエータ側の軸受ブッシュ２７部に注入する際、
グリスポンプの注入圧力は、一般的な手動のものでも最
大２００kg１cm2 ・ｇ位まで昇圧可能なので、過度にグ
リスを注入し過ぎると、反アクチュエータ側において弁
軸１２及び軸受ブッシュ２７の端面とエンドカバー２０
との間の端部室３５に充填されたグリスにより、弁軸１
２に過度のスラスト力が加わり、アクチュエータ側のワ
ッシャ２６，弁軸１２，バッキンブッシュ２５の間に力
が発生し、この力は弁軸１２を回動する際のトルク負荷
となり弁の開閉不良を引き起こすという問題がある。When a grease pump is used to inject grease into the actuator bush and the anti-actuator bearing bush 27 through the injection passages 33 and 33a,
The injection pressure of the grease pump can be increased up to about 200 kg 1 cm 2 · g even with a general manual one, so if too much grease is injected too much, the end surface of the valve shaft 12 and the bearing bush 27 and the end cover on the non-actuator side. 20
The grease filling the end chamber 35 between the valve shaft 1 and
An excessive thrust force is applied to 2 and a force is generated between the washer 26, the valve shaft 12 and the backing bush 25 on the actuator side, and this force becomes a torque load when rotating the valve shaft 12 to prevent valve opening / closing failures. There is a problem of causing.
【００１２】本発明の目的は、グリス注入圧力による過
度のスラスト力が弁軸に発生し、このため弁の開閉不良
を引き起こすのを防止することができる遮断弁を提供す
ることである。It is an object of the present invention to provide a shut-off valve which can prevent excessive thrust force due to the grease injection pressure from being generated in the valve shaft and thus causing the valve to fail to open and close.
【００１３】[0013]
【課題を解決するための手段】上記課題を解決するため
に、本発明によれば板状の弁体が取付けられ、アクチュ
エータにより回動する弁軸と、この弁軸のアクチュエー
タ側と反アクチュエータ側の両端部をそれぞれ囲んで弁
軸を支持し、外面と内面とにグリスを供給するグリス通
路を有する軸受ブッシュと、弁箱に取付けられ、反アク
チュエータ側の軸受ブッシュを囲み、さらに弁軸及びこ
の軸受ブッシュの両端面を覆い、貫通して設けられるグ
リス注入路を有するエンドカバーとを備え、グリスがグ
リス注入路から反アクチュエータ側の軸受ブッシュ及び
弁軸の両端面とエンドカバーとの間の端部室に充填され
た後、軸受ブッシュのグリス通路を経て軸受ブッシュと
弁軸及びエンドカバーとの間の両隙間に充填される遮断
弁において、端部室に連通してエンドカバーに取付けら
れ、端部室内のグリス圧を許容値に設定するレリーフ弁
を設けるものとする。In order to solve the above-mentioned problems, according to the present invention, a plate-shaped valve body is attached and a valve shaft rotated by an actuator, and an actuator side and an anti-actuator side of this valve shaft. Bearing bush having a grease passage for supplying grease to the outer surface and the inner surface by surrounding both ends of the bearing bush and the bearing bush on the side opposite to the actuator. An end cover that covers both end surfaces of the bearing bush and has a grease injection passage provided therethrough, and the grease is an end between the end cover and both end surfaces of the bearing bush and the valve shaft on the side of the actuator opposite from the grease injection passage. At the end of the shut-off valve that fills the clearance between the bearing bush and the valve shaft and the end cover through the grease passage of the bearing bush after filling the chamber Communicates with the attached to the end cover, it is assumed to provide a relief valve for setting the grease pressure in the end chamber to an acceptable value.
【００１４】また、板状の弁体が取付けられ、アクチュ
エータにより回動する弁軸と、この弁軸のアクチュエー
タ側と反アクチュエータ側の両端部をそれぞれ囲んで弁
軸を支持する軸受ブッシュと、弁箱に取付けられ、反ア
クチュエータ側の軸受ブッシュを囲み、さらに軸受ブッ
シュの端面に接触し、弁軸の端面を覆い、貫通して設け
られるグリス注入路を有するエンドカバーとを備え、グ
リスが軸受ブッシュ部に注入される遮断弁において、反
アクチュエータ側の軸受ブッシュにその側壁を貫通する
複数の孔と、これらの孔の側壁の外面及び内面側の端部
にそれぞれ連通する環状の溝とを設け、グリス注入路の
出口を前記外面側の環状の溝に開口し、さらに軸受ブッ
シュと弁軸とのエンドカバー側の間及び軸受ブッシュの
端面とエンドカバーとの間に、グリスが弁軸の端面側に
漏洩するのを防止するシールリングを設けるものとす
る。Further, a plate-shaped valve body is attached, a valve shaft which is rotated by an actuator, a bearing bush which surrounds both ends of the valve shaft on the actuator side and a side opposite to the actuator, and which supports the valve shaft, and a valve. The bearing bush is mounted on a box, surrounds the bearing bush on the side opposite to the actuator, contacts the end surface of the bearing bush, covers the end surface of the valve shaft, and has an end cover that has a grease injection passage provided therethrough. In the shutoff valve injected into the portion, the bearing bush on the side opposite to the actuator is provided with a plurality of holes penetrating the side wall thereof, and annular grooves communicating with the outer and inner end portions of the side wall of these holes, respectively. The outlet of the grease injection passage is opened in the annular groove on the outer surface side, and further, between the end cover side of the bearing bush and the valve shaft and the end surface of the bearing bush and the end cover. Between the grease is assumed to provide a seal ring for preventing the leakage of the end face of the valve stem.
【００１５】また、上記において、グリス注入路の出口
が開口する軸受ブッシュの環状の溝の箇所と異なる箇所
の前記環状の溝に開口してエンドカバーを貫通して設け
られ、グリス注入圧を解放する圧抜き路と、この圧抜き
路に接続する弁とを備えるものとする。Further, in the above, the grease injection pressure is released by being provided in the annular groove of the bearing bush, which is different from the annular groove of the bearing in which the outlet of the grease injecting passage is opened, and penetrating through the end cover. And a valve connected to the pressure relief passage.
【００１６】[0016]
【作用】板状の弁体が取付けれら、アクチュエータによ
り回動する弁軸の両端部はそれぞれ軸受ブッシュに支持
される。ここでアクチュエータ側の軸受ブッシュは弁箱
に取付けられ、弁軸の端部を囲むカバー内に弁軸の端部
を囲んで設けられ、反アクチュエータ側の軸受ブッシュ
はこの軸受ブッシュと弁軸との両端面を覆って弁箱に取
付けられるエンドカバー内に設けられ、弁軸の端部を囲
んで設けられる。When the plate-shaped valve body is attached, both ends of the valve shaft rotated by the actuator are supported by bearing bushes. Here, the bearing bush on the actuator side is attached to the valve box, and is provided so as to surround the end portion of the valve shaft in a cover that surrounds the end portion of the valve shaft. It is provided in an end cover that covers both end faces and is attached to the valve box, and surrounds the end of the valve shaft.
【００１７】ここで、グリスをエンドカバーを貫通して
設けられたグリス注入路から軸受ブッシュに設けられた
グリス通路を経て、軸受ブッシュと弁軸及びエンドカバ
ーとの間の両隙間に充填するときには、軸受ブッシュ及
び弁軸との端面とエンドカバーとの間の端部室にグリス
が充填されてから前記隙間に充填される。したがって、
端部室に接続されるレリーフ弁の逃がし圧力を弁軸にか
かるスラスト力が許容できる設定圧力に設定しておけ
ば、グリスポンプによりグリスをグリス注入路を経て過
度に注入しても、レリーフ弁により端部室のグリス圧力
は前記設定圧力に設定され、弁軸にグリス圧力によるス
ラスト力を許容値に収めることができる。したがって弁
軸の回動不良を防止できる。Here, when the grease is filled in both gaps between the bearing bush and the valve shaft and the end cover through the grease injection passage provided through the end cover and the grease passage provided in the bearing bush. The end chamber between the end surface of the bearing bush and the valve shaft and the end cover is filled with grease and then the gap is filled. Therefore,
If the relief pressure of the relief valve connected to the end chamber is set to a setting pressure that allows the thrust force applied to the valve shaft, even if the grease is excessively injected through the grease injection passage by the grease pump, The grease pressure in the end chamber is set to the set pressure, and the thrust force due to the grease pressure on the valve shaft can be kept within an allowable value. Therefore, defective rotation of the valve shaft can be prevented.
【００１８】また、反アクチュエータ側の軸受ブッシュ
に、その側壁を貫通する複数の孔及びこれらの孔の側壁
の外面と外面側の端部にそれぞれ連通する環状の溝を設
け、軸受ブッシュの端面に接触して軸受ブッシュと弁軸
との端面を覆うエンドカバーのグリスの注入路の出口を
軸受ブッシュの外面側の環状の溝に開口させる。このよ
うにすることによりグリスを注入路から軸受ブッシュに
設けられた孔，環状の溝を経て軸受ブッシュと弁軸及び
エンドカバーとの間の両隙間に充填させる。この際、充
填されるグリスは、軸受ブッシュと弁軸とのエンドカバ
ー側の間及び軸受ブッシュの端面とエンドカバーとの間
に介装するシールリングにより、軸受ブッシュ及び弁軸
の端面とエンドカバーとの間の端部室には流入せず、し
たがって端部室には注入されたグリス圧力がかからず、
このため弁軸にはグリス注入によるスラスト力が作用せ
ず、弁軸の回動不良を防止できる。Further, the bearing bush on the side opposite to the actuator is provided with a plurality of holes penetrating through the side wall thereof and an annular groove communicating with the outer surface of the hole and the end portions on the outer surface side, respectively. The outlet of the grease injection passage of the end cover, which comes into contact with and covers the end faces of the bearing bush and the valve shaft, is opened in the annular groove on the outer surface side of the bearing bush. By doing so, the grease is filled from the injection passage through the hole provided in the bearing bush, the annular groove, and both gaps between the bearing bush and the valve shaft and the end cover. At this time, the grease to be filled is sealed by the seal ring interposed between the bearing bush and the end cover side of the valve shaft and between the end face of the bearing bush and the end cover. Does not flow into the end chamber between and, therefore the end chamber is not filled with grease pressure injected,
Therefore, the thrust force due to the grease injection does not act on the valve shaft, so that the rotation failure of the valve shaft can be prevented.
【００１９】また、エンドカバーのグリスの注入路が開
口する軸受ブッシュの環状の溝と異なる箇所の前記環状
の溝に開口するエンドカバーに貫通して設けられる圧抜
き路に接続される弁を開にすることにより、過度のグリ
ス注入圧の圧力抜けが行なわれるので、シールリングで
グリスの流入が防止される端部室には前述より確実にグ
リス注入による圧力がかからない。Further, a valve connected to a pressure release passage provided through the end cover opened in the annular groove at a location different from the annular groove of the bearing bush in which the grease injection passage of the end cover is opened is opened. By doing so, the pressure of the grease injection pressure is excessively released, so that the pressure due to the grease injection is not reliably applied to the end chamber where the inflow of grease is prevented by the seal ring.
【００２０】[0020]
【実施例】以下図面に基づいて本発明の実施例について
説明する。図１は本発明の実施例による遮断弁の部分断
面図である。なお、図１及び後述する図２において図３
ないし図５の従来例と同一部品には同じ符号を付し、そ
の説明を省略する。図１において従来例と異なるのは、
端部室３５に連通し、エンドカバー２０に配管を介して
止め弁としてのブロック弁４０とレリーフ弁４２とを設
けたことである。なお、ブロック弁４０において、４１
はブロック弁４０を開閉操作するレバーである。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of a shutoff valve according to an embodiment of the present invention. In addition, in FIG. 1 and FIG.
The same parts as those of the conventional example shown in FIG. 5 are designated by the same reference numerals, and the description thereof is omitted. 1 differs from the conventional example in that
The block valve 40 as a stop valve and the relief valve 42 are provided in the end cover 20 via pipes so as to communicate with the end chamber 35. In the block valve 40, 41
Is a lever for opening and closing the block valve 40.
【００２１】このような構成により、グリスを遮断弁の
反アクチュエータ側の軸受ブッシュ２７に充填するとき
には、レリーフ弁４２の逃がし圧力の設定圧力を端部室
３５内のグリス圧力により、弁軸１２にかかるスラスト
力が弁軸１２の回動不良を起こさない許容圧力に設定す
る。そして、ブロック弁４０をレバー４１の操作により
開にして、グリスポンプによりグリスを止め弁３７を開
にした配管３６を経て注入路３３ａから端部室３５に注
入すれば、グリスは端部室３５を充填してから前述のよ
うに軸受ブッシュ２７と弁軸１２のジャーナル部２４
ａ、及びエンドカバー２０との間の両隙間に充填され
る。この際、過度のグリス注入により、端部室３５内の
グリス圧がレリーフ弁４２の設定圧力より高くなれば、
グリスはレリーフ弁４２から外部に逃げ、端部室３５内
のグリス圧力は前記設定圧力に保持される。したがっ
て、弁軸１２には端部室３５内のグリス圧により生じる
スラスト力は許容値になるので、アクチュエータ側のワ
ッシャ２６，弁軸１２，パッキンブッシュ２５の間に発
生する力は許容値となり、弁軸１２の回動不良を防止で
きる。With this structure, when the bearing bush 27 on the side opposite to the actuator of the shutoff valve is filled with grease, the relief pressure set by the relief valve 42 is applied to the valve shaft 12 by the grease pressure in the end chamber 35. The thrust force is set to a permissible pressure that does not cause the rotation failure of the valve shaft 12. Then, the block valve 40 is opened by operating the lever 41, and the grease is filled into the end chamber 35 by injecting it into the end chamber 35 from the injection passage 33a through the pipe 36 in which the grease is stopped by the grease pump and the valve 37 is opened. Then, as described above, the bearing bush 27 and the journal portion 24 of the valve shaft 12 are
The gap between the a and the end cover 20 is filled. At this time, if the grease pressure in the end chamber 35 becomes higher than the set pressure of the relief valve 42 due to excessive grease injection,
The grease escapes from the relief valve 42 to the outside, and the grease pressure in the end chamber 35 is maintained at the set pressure. Therefore, the thrust force generated by the grease pressure in the end chamber 35 has an allowable value on the valve shaft 12, so that the force generated between the washer 26 on the actuator side, the valve shaft 12, and the packing bush 25 has an allowable value. Rotation failure of the shaft 12 can be prevented.
【００２２】なお、ブロック弁４０は弁箱内の腐食性流
体の外部への漏洩の完全防止を行なうために設けられ、
遮断弁使用時にはレバー４１によりブロック弁４０を閉
にするのがよい。図２は本発明の異なる実施例による遮
断弁の部分断面図である。図２において、軸受ブッシュ
４４は図１の軸受ブッシュ２７と同様に弁軸１２のジャ
ーナル部２４ａを支持し、軸受ブッシュ４４にはその側
壁を貫通する複数の孔４５と、これらの孔４５の側壁の
外面と内面側との端部にそれぞれ連通し、軸受ブッシュ
４４の外面と内面とに環状の溝４６，４６ａが設けら
れ、さらに軸受ブッシュ４４の内面にはＯリングを収納
する環状の溝４７が設けられており、軸受ブッシュ４４
と弁軸１２のジャーナル部２４ａとの間にはＯリング４
８が環状の溝４７に挿入されて介装されている。The block valve 40 is provided to completely prevent the corrosive fluid in the valve box from leaking to the outside.
When using the shutoff valve, it is preferable to close the block valve 40 with the lever 41. FIG. 2 is a partial sectional view of a shutoff valve according to another embodiment of the present invention. 2, the bearing bush 44 supports the journal portion 24a of the valve shaft 12 similarly to the bearing bush 27 of FIG. 1, and the bearing bush 44 has a plurality of holes 45 penetrating the side walls thereof and side walls of these holes 45. Of the bearing bush 44 are provided with annular grooves 46 and 46a, respectively, which are communicated with the ends of the outer surface and the inner surface of the bearing bush 44, and the inner surface of the bearing bush 44 has an annular groove 47 for accommodating an O-ring. Bearing bush 44
And an O-ring 4 between the journal portion 24a of the valve shaft 12 and
8 is inserted and inserted in the annular groove 47.
【００２３】エンドカバー２０は軸受ブッシュ４４の端
面に接触し、弁軸１２のジャーナル部２４ａの端面を覆
って弁箱１に取付けられている。なお、エンドカバー２
０と軸受ブッシュ４４の端面との間には、エンドカバー
２０に設けられた環状の溝にＯリング４９が挿入されて
介装されている。エンドカバー２０を貫通する注入路３
３ａの出口３３ｂは、軸受ブッシュ４４の孔４５に臨ん
で環状の溝４６に開口している。The end cover 20 contacts the end surface of the bearing bush 44 and covers the end surface of the journal portion 24a of the valve shaft 12 and is attached to the valve housing 1. The end cover 2
An O-ring 49 is inserted in an annular groove provided in the end cover 20 between 0 and the end surface of the bearing bush 44. Injection path 3 penetrating the end cover 20
The outlet 33b of 3a faces the hole 45 of the bearing bush 44 and opens into the annular groove 46.
【００２４】また、エンドカバー２０を貫通して圧抜き
路５１が設けられ、一方の開口は軸受ブッシュ４４の注
入路３３ａの出口３３ｂが臨む孔４５に対向する位置の
孔４５に臨んで環状の溝４６に開口し、他方の開口には
エルボ５２，ニップル５３を介して止め弁５４が取付け
られている。このような構成により、グリスを遮断弁の
反アクチュエータ側の軸受ブッシュ４４部に充填すると
きには、グリスポンプによりグリスを止め弁３７を開に
した配管３６を経て注入路３３ａに流入し、その出口３
３ｂから環状の溝４６，４６ａ，孔４５を経て、軸受ブ
ッシュ４４と弁軸１２のジャーナル部２４ａ及びエンド
カバー２０との間の両隙間に充填される。この際、グリ
スが過度に注入されても、軸受ブッシュ４４と弁軸１２
のジャーナル部２４ａ及びエンドカバー２０との間の両
隙間に流入したグリスは、Ｏリング４８，４９により端
部室３５に流入せず、端部室３５にはグリス注入による
圧力がかからない。したがって、弁軸１２にはグリス注
入によるスラスト力は作用せず、弁軸の回動不良を防止
できる。A pressure relief passage 51 is provided through the end cover 20, one opening of which has an annular shape facing the hole 45 at a position opposite to the hole 45 of the outlet 33b of the injection passage 33a of the bearing bush 44. A stop valve 54 is attached to the groove 46, and the other opening is provided with an elbow 52 and a nipple 53. With this configuration, when the bearing bush 44 on the side opposite to the actuator of the shutoff valve is filled with grease, the grease is stopped by the grease pump and flows into the injection passage 33a through the pipe 36 in which the valve 37 is opened, and the outlet 3
3b, through the annular grooves 46, 46a and the hole 45, both gaps between the bearing bush 44 and the journal portion 24a of the valve shaft 12 and the end cover 20 are filled. At this time, even if the grease is excessively injected, the bearing bush 44 and the valve shaft 12
The grease that has flowed into both gaps between the journal portion 24a and the end cover 20 does not flow into the end chamber 35 by the O-rings 48 and 49, and no pressure is applied to the end chamber 35 by the grease injection. Therefore, the thrust force due to the grease injection does not act on the valve shaft 12, so that the rotation failure of the valve shaft can be prevented.
【００２５】また、グリス注入後、止め弁５４を開にす
ることにより、過度なグリス注入時の残圧はなくなるの
で、端部室３５にはグリス注入による圧力がかからず、
より確実に弁軸の回動不良を防止できる。なお、上記図
１，図２の実施例では遮断弁としてチェック形遮断弁に
ついて説明したが、バラフライ弁においても同じ作用，
効果が得られる。Further, by opening the stop valve 54 after the grease injection, the residual pressure at the time of excessive grease injection is eliminated, so that the end chamber 35 receives no pressure due to the grease injection.
The rotation failure of the valve shaft can be prevented more reliably. Although the check type shut-off valve has been described as the shut-off valve in the embodiments of FIGS.
The effect is obtained.
【００２６】[0026]
【発明の効果】以上の説明から明らかなように、請求項
１において前述の構成により、グリス注入時、弁軸及び
軸受ブッシュの端面とエンドカバーとの間の端部室に充
填されるグリスの圧力をレリーフ弁により許容圧力の設
定圧力に調整できるので、弁軸にかかるスラスト力は許
容値になり、スラスト力の過大による弁軸の回動不良を
防止できる。As is apparent from the above description, according to the first aspect of the present invention, when the grease is injected, the pressure of the grease filled in the end chamber between the end surface of the valve shaft and the bearing bush and the end cover is increased. Since the relief valve can adjust the set pressure to the allowable pressure, the thrust force applied to the valve shaft becomes a permissible value, and the rotation failure of the valve shaft due to the excessive thrust force can be prevented.
【００２７】また、請求項２においてグリス注入時、軸
受ブッシュと弁軸及びエンドカバーとの間にシールリン
グを設けたので、グリスの注入圧力はシールリングによ
り弁軸及び軸受ブッシュの端面とエンドカバーとの間の
端部室にかからず、このため弁軸にはスラスト力が作用
せず、この結果弁軸の回動不良を防止できる。なお、請
求項３に示すようにグリス注入時、圧抜き路に設けた止
め弁を開にして過度な注入圧力の残圧をなくすことによ
り、前記端部室にはより確実にグリス注入による圧力が
かからないので、弁軸にはスラスト力が作用せず、この
ためより確実に弁軸の回動不良を防止できる。In the second aspect of the present invention, since the seal ring is provided between the bearing bush and the valve shaft and the end cover during the grease injection, the grease injection pressure is applied by the seal ring to the end surfaces of the valve shaft and the bearing bush and the end cover. Therefore, no thrust force acts on the valve shaft, and as a result, poor rotation of the valve shaft can be prevented. As described in claim 3, when the grease is injected, the stop valve provided in the pressure release passage is opened to eliminate the residual pressure of the excessive injection pressure. Since it is not applied, the thrust force does not act on the valve shaft, and thus the rotation failure of the valve shaft can be more reliably prevented.
【図１】本発明の実施例による遮断弁の部分断面図FIG. 1 is a partial sectional view of a shutoff valve according to an embodiment of the present invention.
【図２】本発明の異なる実施例による遮断弁の部分断面
図FIG. 2 is a partial cross-sectional view of a shutoff valve according to another embodiment of the present invention.
【図３】従来の遮断弁の断面図FIG. 3 is a sectional view of a conventional shutoff valve.
【図４】図３のＡ−Ａ矢視断面図FIG. 4 is a sectional view taken along the line AA of FIG.
【図５】図４の軸受ブッシュのＢ部の拡大断面図5 is an enlarged cross-sectional view of a portion B of the bearing bush of FIG.
８ 弁体 １２ 弁軸 ２７ 軸受ブッシュ ２９ 孔 ３０ 通路孔 ３１，３１ａ 環状の溝 ３３，３３ａ 注入路 ３５ 端部室 ４２ レリーフ弁 ４４ 軸受ブッシュ ４５ 孔 ４６，４６ａ 環状の溝 ４８ Ｏリング ４９ Ｏリング ５１ 圧抜き路 ５４ 止め弁 8 valve body 12 valve shaft 27 bearing bush 29 hole 30 passage hole 31, 31a annular groove 33, 33a injection path 35 end chamber 42 relief valve 44 bearing bush 45 hole 46, 46a annular groove 48 O-ring 49 O-ring 51 pressure Withdrawal path 54 Stop valve
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｃ 39/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location F16C 39/00
Claims (3)
により回動する弁軸と、この弁軸のアクチュエータ側と
反アクチュエータ側の両端部をそれぞれ囲んで弁軸を支
持し、外面と内面とにグリスを供給するグリス通路を有
する軸受ブッシュと、弁箱に取付けられ、反アクチュエ
ータ側の軸受ブッシュを囲み、さらに弁軸及びこの軸受
ブッシュの両端面を覆い、貫通して設けられたグリス注
入路を有するエンドカバーとを備え、グリスがグリス注
入路から反アクチュエータ側の軸受ブッシュ及び弁軸の
両端面とエンドカバーとの間の端部室に充填された後、
軸受ブッシュのグリス通路を経て軸受ブッシュと弁軸及
びエンドカバーとの間の両隙間に充填される遮断弁にお
いて、端部室に連通してエンドカバーに取付けられ、端
部室内のグリス圧を許容値に設定するレリーフ弁を設け
たことを特徴とする遮断弁。1. A valve shaft, to which a plate-shaped valve element is attached, which is rotated by an actuator, and which surrounds both ends of the valve shaft on the actuator side and on the side opposite to the actuator, respectively, to support the valve shaft, and to form an outer surface and an inner surface A bearing bush having a grease passage for supplying grease to the valve box and a grease injection passage that is attached to the valve box, encloses the bearing bush on the side opposite to the actuator, covers the valve shaft and both end faces of this bearing bush, and penetrates the bearing bush. And an end cover having, and after the grease is filled into the end chamber between both end surfaces of the bearing bush and the valve shaft on the side opposite to the actuator from the grease injection passage and the end cover,
In a shutoff valve that fills both gaps between the bearing bush and the valve shaft and end cover through the grease passage of the bearing bush, it is attached to the end cover in communication with the end chamber, and the grease pressure in the end chamber is allowed A shutoff valve characterized by being provided with a relief valve for setting.
により回動する弁軸と、この弁軸のアクチュエータ側と
反アクチュエータ側の両端部をそれぞれ囲んで弁軸を支
持する軸受ブッシュと、弁箱に取付けられ、反アクチュ
エータ側の軸受ブッシュを囲み、さらにこの軸受ブッシ
ュの端面に接触し、弁軸の端面を覆い、貫通して設けら
れるグリス注入路を有するエンドカバーとを備え、グリ
スが軸受ブッシュ部に注入される遮断弁において、反ア
クチュエータ側の軸受ブッシュにその側壁を貫通する複
数の孔と、これらの孔の側壁の外面及び内面側の端部に
それぞれ連通する環状の溝とを設け、グリス注入路の出
口を前記外面側の環状の溝に開口し、さらに軸受ブッシ
ュと弁軸とのエンドカバー側の間及び軸受ブッシュの端
面とエンドカバーとの間に、グリスが弁軸の端面側に漏
洩するのを防止するシールリングを介装したことを特徴
とする遮断弁。2. A valve shaft to which a plate-shaped valve element is attached, which is rotated by an actuator, a bearing bush which surrounds both ends of the valve shaft on the actuator side and a side opposite to the actuator, and which supports the valve shaft, and a valve. The bearing is attached to the box, surrounds the bearing bush on the side opposite to the actuator, and further includes an end cover that contacts the end surface of the bearing bush, covers the end surface of the valve shaft, and has a grease injection passage provided therethrough. In the shutoff valve injected into the bush portion, the bearing bush on the side opposite to the actuator is provided with a plurality of holes penetrating the side wall thereof, and annular grooves communicating with the outer and inner end portions of the side wall of these holes, respectively. , The outlet of the grease injection passage is opened to the annular groove on the outer surface side, and further between the bearing bush and the valve shaft between the end cover side and the end surface of the bearing bush and the end cover. During the shut-off valve, characterized in that grease is interposed a seal ring to prevent the leaking to the end face of the valve stem.
路の出口が開口する軸受ブッシュの環状の溝の箇所と異
なる箇所の前記環状の溝に開口してエンドカバーを貫通
して設けられ、グリス注入圧を解放する圧抜き路と、こ
の圧抜き路に接続する弁とを備えたことを特徴とする遮
断弁。3. The bearing according to claim 2, wherein the end of the grease injection passage is opened through the annular groove of the bearing bush, which is different from the annular groove of the bearing bush, and the end cover is penetrated. A shutoff valve comprising a pressure relief passage for releasing the grease injection pressure and a valve connected to the pressure relief passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28886993A JP3201105B2 (en) | 1993-11-18 | 1993-11-18 | Shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28886993A JP3201105B2 (en) | 1993-11-18 | 1993-11-18 | Shut-off valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07139640A true JPH07139640A (en) | 1995-05-30 |
| JP3201105B2 JP3201105B2 (en) | 2001-08-20 |
Family
ID=17735815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28886993A Expired - Lifetime JP3201105B2 (en) | 1993-11-18 | 1993-11-18 | Shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3201105B2 (en) |
Cited By (5)
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| WO2012029553A1 (en) * | 2010-09-01 | 2012-03-08 | 株式会社Ihi | Waste heat power generator |
| JP2013174330A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Check valve |
| CN103671955A (en) * | 2014-01-07 | 2014-03-26 | 天津贝特尔流体控制阀门有限公司 | Swing axial-flow safety shut-off valve for natural gas |
| CN105042094A (en) * | 2015-07-08 | 2015-11-11 | 特瑞斯（北京）流体科技有限公司 | Safety shut-off valve |
| JP2019116849A (en) * | 2017-12-26 | 2019-07-18 | 三菱日立パワーシステムズ株式会社 | Steam stop valve and steam turbine |
-
1993
- 1993-11-18 JP JP28886993A patent/JP3201105B2/en not_active Expired - Lifetime
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|---|---|---|---|---|
| WO2012029553A1 (en) * | 2010-09-01 | 2012-03-08 | 株式会社Ihi | Waste heat power generator |
| CN103026007A (en) * | 2010-09-01 | 2013-04-03 | 株式会社Ihi | Waste heat power generator |
| JP5447677B2 (en) * | 2010-09-01 | 2014-03-19 | 株式会社Ｉｈｉ | Waste heat power generator |
| US9219404B2 (en) | 2010-09-01 | 2015-12-22 | Ihi Corporation | Waste heat power generator |
| JP2013174330A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Check valve |
| CN103671955A (en) * | 2014-01-07 | 2014-03-26 | 天津贝特尔流体控制阀门有限公司 | Swing axial-flow safety shut-off valve for natural gas |
| CN105042094A (en) * | 2015-07-08 | 2015-11-11 | 特瑞斯（北京）流体科技有限公司 | Safety shut-off valve |
| JP2019116849A (en) * | 2017-12-26 | 2019-07-18 | 三菱日立パワーシステムズ株式会社 | Steam stop valve and steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3201105B2 (en) | 2001-08-20 |
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