JP3530615B2 - Float trap - Google Patents
Float trapInfo
- Publication number
- JP3530615B2 JP3530615B2 JP05173495A JP5173495A JP3530615B2 JP 3530615 B2 JP3530615 B2 JP 3530615B2 JP 05173495 A JP05173495 A JP 05173495A JP 5173495 A JP5173495 A JP 5173495A JP 3530615 B2 JP3530615 B2 JP 3530615B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- float
- diameter
- small
- hole
- 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 - Fee Related
Links
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、気体と液体の比重差を
利用して、フロ―トで弁手段を駆動し、気液混合系から
一方の流体を自動的に排出するトラップの構造に関し、
特に少量から多量の排出ができるようにしたフロ―ト式
トラップに関する。
【０００２】フロ―ト式トラップは、気体と液体が混在
する系から気体または液体の一方を選択的に排出すると
きに用いる。蒸気配管系に発生する復水を自動的に排出
するスチ―ムトラップ、圧縮配管系に発生する凝縮水を
自動的に排出するエア―トラップ等である。
【０００３】比重の小さい気体は比重の大きい液体の上
方に位置する。液面は液体と気体の量的割合の変化に応
じて上下する。フロ―トはこれに作用する浮力と自重の
釣合いで液面に浮き、液面と共に上下に移動する。フロ
―ト式トラップはこれらの自然法則を利用したもので、
弁室において気液を分離し、弁室の上部あるいは下部に
弁孔を配置し、弁室内に収容したフロ―トの上下運動で
弁手段を駆動して弁孔を開閉し、一方の流体を選択的に
自動的に排出するものである。
【０００４】フロ―トの上下運動によって単一の弁孔を
開閉するだけでは、フロ―トによって開閉できる弁孔面
積が小さく、多量の排出には不適であった。
【０００５】
【従来の技術】そこで、従来は、特開平２−３００５９
８号公報に示されているような技術が用いられていた。
これは、弁ケ―シングで入口と弁室と出口を形成し、弁
室と出口を連通する複数の大径弁孔を形成し、複数の弁
孔を同時に開閉するスライド弁体を配置すると共に、ス
ライド弁体に連結棒を介してフロ―トを連結したもので
あり、小さなフロ―トの浮力、すなわち小さな開弁力で
もってスライド弁体を駆動して複数の大径弁孔を開閉で
きるようにし、多量の排出を可能としたものである。
【０００６】
【発明が解決しようとする課題】上記従来のものでは、
フロ―トとスライド弁体とを連結棒を介して連結したも
のであるので、これらを収容するために大きな弁ケ―シ
ングを必要とする問題があった。また複数の大径弁孔を
一気に開口するものであるので、流体の急激な流れが生
じてウォ―タハンマを起こす問題があった。
【０００７】従って本発明の技術的課題は、小型でウォ
―タハンマを生じることのないフロ―ト式トラップを提
供することである。
【０００８】
【課題を解決する為の手段】上記の技術的課題を解決す
るために講じた本発明の技術的手段は、弁ケ―シングで
入口と弁室と出口を形成し、周囲壁と上面壁を有する弁
座部材を弁室と出口の間に固定し、弁座部材の周囲壁に
複数の大径弁孔を形成すると共に弁座部材の上面壁に小
径弁孔を形成し、小径弁孔を開閉するフロ―トを弁室の
弁座部材の上に収容し、フロ―トを囲う円筒部と上壁部
と係止部を有し円筒部で複数の大径弁孔を開閉するスラ
イド弁体を弁室内に収容し、小径弁孔を開口したフロ―
トがさらに浮上し上壁部に当接してスライド弁体を持上
げて大径弁孔を開口させ、フロ―トが降下し係止部に当
接してスライド弁体を押し下げて大径弁孔を閉止させる
と共に小径弁孔を閉止することを特徴とするフロ―ト式
トラップにある。
【０００９】
【作用】上記の技術的手段の作用は下記の通りである。
フロ―トをスライド弁体で囲ったものであり、すなわち
スライド弁体を収容する空間とは別にフロ―トを収容す
る空間を必要としないので、弁ケ―シングを小型にする
ことができる。また小径弁孔を開口したフロ―トがさら
に浮上し上壁部に当接してスライド弁体を持上げて大径
弁孔を開口させるものであり、すなわち大径弁孔の開口
に先立って小径弁孔を開口するものであるので、流体の
急激な流れが生ぜず、ウォ―タハンマを起こすことがな
い。
【００１０】
【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（図１参照）。本実施例はフロ―ト式スチ―ムト
ラップに適用したものである。上ケ―シング１と下ケ―
シング２とをねじ結合して、内部に弁室３を有する弁ケ
―シングが形成される。上ケ―シング１に入口４が、下
ケ―シング２に出口５が形成される。弁室３の上部に
は、多数の細孔を有し入口４に向かって湾曲した形状の
スクリ―ン６と複数の連通孔７を有する保持部材８とが
スナップリング９によって固定されている。
【００１１】弁室３と出口５との間に弁座部材１０がね
じ結合されている。弁座部材１０は、上端に上面壁１１
を有する大径の周囲壁１２と、その下方の小径の周囲壁
１３からなり、小径周囲壁１３が下ケ―シング２にねじ
結合されている。そして上面壁１１の中央には小径弁孔
１４が形成され、大径周囲壁１２には複数の大径弁孔１
５が形成されている。大径弁孔１５は両側及び手前側と
向側に夫々向い合って合計４つ形成されている。小径弁
孔１４及び複数の大径弁孔１５によって弁室３と出口５
とが連通されている。
【００１２】弁室３の弁座部材１０の上に中空球形のフ
ロ―ト１６が自由状態で収容されている。フロ―ト１６
は、液面に従って浮上降下し、小径弁孔１４を開閉す
る。また弁室３にフロ―ト１６を囲ってスライド弁体１
７が収容されている。スライド弁体１７は、複数の連通
孔１８を有する円筒部１９と同じく複数の連通孔２０を
有する上壁部２１と係止部２２とからなる。上壁部２１
は、浮上途中のフロ―ト１６の当接によって持上げられ
る。一方係止部２２は、降下途中のフロ―トの当接によ
って押下げられる。そして円筒部１８は、下端が弁座部
材の１０の大径周囲壁１２の外周に位置し、下端内周面
が弁座部材１０の大径弁孔１５を開閉する弁面をなす。
【００１３】上記スチ―ムトラップの作動は下記の通り
である。入口４は蒸気使用機器等の復水発生箇所に接続
する。復水と蒸気が弁室３に流入し、復水が下部に蒸気
が上部に分離して溜る。フロ―ト１６は弁室３内の液面
上昇に従って浮上し、小径弁孔１４を開口する。そして
さらに浮上が進行すると、スライド弁体１７の上壁部２
１に当接してスライド弁体１７を持上げ、大径弁孔１５
を開口させる。弁室３内の液面が下がるとフロ―ト１６
は降下し、スライド弁体１７の係止部２２に当接してス
ライド弁体１７を押し下げ、大径弁孔１５を閉止させる
と共に小径弁孔１４を閉止する。
【００１４】
【発明の効果】本発明は下記の特有の効果を生じる。上
記のように本発明によれば、フロ―トをスライド弁体で
囲い、小径弁孔を開口したフロ―トがさらに浮上し上壁
部に当接してスライド弁体を持上げて大径弁孔を開口さ
せるようにしたことにより、弁ケ―シングを小型にきる
と共に、ウォ―タハンマを起こすことのないフロ―ト式
トラップを提供することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes a difference in specific gravity between a gas and a liquid to drive a valve means with a float, thereby allowing one fluid to flow from a gas-liquid mixing system. The structure of the trap that automatically discharges
In particular, the present invention relates to a float trap capable of discharging a small amount to a large amount. A float type trap is used for selectively discharging either gas or liquid from a system in which gas and liquid are mixed. There are a steam trap for automatically discharging condensed water generated in the steam piping system, and an air trap for automatically discharging condensed water generated in the compression piping system. A gas having a low specific gravity is located above a liquid having a high specific gravity. The liquid level rises and falls according to the change in the quantitative ratio between the liquid and the gas. The float floats on the liquid surface in balance with the buoyancy acting on it and its own weight, and moves up and down with the liquid surface. Float traps take advantage of these natural laws,
Gas-liquid is separated in the valve chamber, a valve hole is arranged at the upper or lower part of the valve chamber, the valve means is driven by the up and down movement of the float accommodated in the valve chamber to open and close the valve hole, and one of the fluids is discharged. It is selectively and automatically discharged. [0004] If only a single valve hole is opened and closed by the vertical movement of the float, the area of the valve hole that can be opened and closed by the float is small, which is not suitable for discharging a large amount. Conventionally, Japanese Patent Application Laid-Open No. 2-30059 / 1990
A technique as disclosed in Japanese Patent Application Laid-Open No. 8 (1994) -208 is used.
This is achieved by forming an inlet, a valve chamber, and an outlet by valve casing, forming a plurality of large-diameter valve holes communicating the valve chamber and the outlet, and disposing a slide valve body that simultaneously opens and closes the plurality of valve holes. The float is connected to the slide valve body via a connecting rod, and the slide valve body can be driven with a small float buoyancy, that is, a small valve opening force to open and close a plurality of large diameter valve holes. In this way, a large amount of waste can be discharged. [0006] In the above conventional device,
Since the float and the slide valve element are connected via a connecting rod, there is a problem that a large valve casing is required to accommodate them. Further, since a plurality of large-diameter valve holes are opened at a stretch, there is a problem that a sudden flow of fluid occurs to cause water hammer. Accordingly, it is an object of the present invention to provide a float type trap which is small and does not cause water hammer. Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to form an inlet, a valve chamber, and an outlet by valve casing, and to form a peripheral wall with a peripheral wall. a valve seat member having an upper wall and fixed between the valve chamber and the outlet, forming a small diameter valve hole in the top wall of the valve seat member to form a plurality of large diameter valve hole in the peripheral wall of the valve seat member, a small diameter Float for opening and closing the valve hole
A cylindrical part and an upper wall that are housed on the valve seat member and surround the float
A slide valve body having a cylindrical portion and a cylindrical portion for opening and closing a plurality of large-diameter valve holes is accommodated in the valve chamber and a small-diameter valve hole is opened.
And the slide valve body is lifted by contacting the upper wall
To open the large diameter valve hole.
Contact and push down the slide valve body to close the large diameter valve hole
Float type with small diameter valve hole closed
In the trap . The operation of the above technical means is as follows.
Since the float is surrounded by the slide valve element , that is, a space for accommodating the float is not required separately from the space for accommodating the slide valve element, the valve casing can be downsized. In addition, the float with the small diameter valve hole opened
And comes into contact with the upper wall to lift the slide valve element
Since the valve hole is opened , that is, the small-diameter valve hole is opened prior to the opening of the large-diameter valve hole, a rapid flow of fluid does not occur and water hammer does not occur. An embodiment showing a specific example of the above technical means will be described (see FIG. 1). This embodiment is applied to a float type steam trap. Upper case 1 and lower case
A valve casing having a valve chamber 3 therein is formed by screwing the thing 2 with a screw. An inlet 4 is formed in the upper case 1 and an outlet 5 is formed in the lower case 2. A screen 6 having a large number of small holes and curved toward the inlet 4 and a holding member 8 having a plurality of communication holes 7 are fixed to the upper part of the valve chamber 3 by a snap ring 9. A valve seat member 10 is screwed between the valve chamber 3 and the outlet 5. The valve seat member 10 has an upper surface wall 11 at the upper end.
And a small-diameter peripheral wall 13 below the large-diameter peripheral wall 12. The small-diameter peripheral wall 13 is screwed to the lower casing 2. A small-diameter valve hole 14 is formed in the center of the upper wall 11, and a plurality of large-diameter valve holes 1 are formed in the large-diameter peripheral wall 12.
5 are formed. A total of four large-diameter valve holes 15 are formed on both sides and on the front side and the opposite side, respectively. The valve chamber 3 and the outlet 5 are formed by the small-diameter valve hole 14 and the plurality of large-diameter valve holes 15.
And are communicated. A hollow spherical float 16 is housed on the valve seat member 10 of the valve chamber 3 in a free state. Float 16
Rises and falls according to the liquid level, and opens and closes the small-diameter valve hole 14. Further, the slide valve element 1 is surrounded by a float 16 in the valve chamber 3.
7 are accommodated. The slide valve element 17 includes a cylindrical portion 19 having a plurality of communication holes 18, an upper wall 21 having a plurality of communication holes 20, and a locking portion 22. Upper wall 21
Is lifted by the contact of the float 16 during the ascent. On the other hand, the locking portion 22 is pushed down by the abutment of the float during the descent. The lower end of the cylindrical portion 18 is located on the outer periphery of the large-diameter peripheral wall 12 of the valve seat member 10, and the inner peripheral surface of the lower end forms a valve surface for opening and closing the large-diameter valve hole 15 of the valve seat member 10. The operation of the steam trap is as follows. The inlet 4 is connected to a condensate generation point such as a device using steam. The condensed water and steam flow into the valve chamber 3, and the condensed water is separated into the lower part and the steam is separated into the upper part. The float 16 floats as the liquid level in the valve chamber 3 rises, and opens the small-diameter valve hole 14. When the ascent further progresses, the upper wall 2 of the slide valve body 17
1 and lifts the slide valve element 17 so that the large-diameter valve hole 15
To open. When the liquid level in the valve chamber 3 drops, the float 16
Descends and contacts the locking portion 22 of the slide valve body 17 to push down the slide valve body 17 to close the large-diameter valve hole 15 and close the small-diameter valve hole 14. The present invention has the following specific effects. According to the present invention as described above, the float is moved by the slide valve body .
Enclosure, float with small diameter valve hole opened further rises and upper wall
Lift the slide valve body in contact with the part to open the large-diameter valve hole.
With this configuration , the float case can be provided without reducing the size of the valve casing and causing no water hammer.
【図面の簡単な説明】
【図１】本発明の実施例のフロ―ト式スチ―ムトラップ
の断面図。
【符号の説明】
１ 上ケ―シング
２ 下ケ―シング
３ 弁室
４ 入口
５ 出口
１０ 弁座部材
１１ 上面壁
１２ 大径周囲壁
１４ 小径弁孔
１５ 大径弁孔
１６ フロ―ト
１７ スライド弁体
１９ 円筒部
２１ 上壁部
２２ 係止部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a float type steam trap according to an embodiment of the present invention. [Description of Signs] 1 Upper casing 2 Lower casing 3 Valve chamber 4 Inlet 5 Outlet 10 Valve seat member 11 Top wall 12 Large diameter peripheral wall 14 Small diameter valve hole 15 Large diameter valve hole 16 Float 17 Slide valve Body 19 Cylindrical part 21 Upper wall part 22 Locking part
Claims (1)
し、周囲壁と上面壁を有する弁座部材を弁室と出口の間
に固定し、弁座部材の周囲壁に複数の大径弁孔を形成す
ると共に弁座部材の上面壁に小径弁孔を形成し、小径弁
孔を開閉するフロ―トを弁室の弁座部材の上に収容し、
フロ―トを囲う円筒部と上壁部と係止部を有し円筒部で
複数の大径弁孔を開閉するスライド弁体を弁室内に収容
し、小径弁孔を開口したフロ―トがさらに浮上し上壁部
に当接してスライド弁体を持上げて大径弁孔を開口さ
せ、フロ―トが降下し係止部に当接してスライド弁体を
押し下げて大径弁孔を閉止させると共に小径弁孔を閉止
することを特徴とするフロ―ト式トラップ。(57) Claims 1. An inlet, a valve chamber, and an outlet are formed by valve casing, and a valve seat member having a peripheral wall and a top wall is fixed between the valve chamber and the outlet, the small-diameter valve hole formed in the upper wall of the valve seat member to form a plurality of large diameter valve hole in the peripheral wall of the valve seat member, the small-diameter valve
The float for opening and closing the hole is housed on the valve seat member of the valve chamber,
It has a cylindrical part surrounding the float, an upper wall, and a locking part.
A slide valve body that opens and closes a plurality of large-diameter valve holes is housed in the valve chamber, and the float with the small-diameter valve holes opened further floats to the upper wall.
And lift the slide valve to open the large-diameter valve hole.
And the float descends and comes into contact with the locking part to remove the slide valve.
Push down to close large diameter valve hole and close small diameter valve hole
DOO type traps - flow, characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05173495A JP3530615B2 (en) | 1995-02-15 | 1995-02-15 | Float trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05173495A JP3530615B2 (en) | 1995-02-15 | 1995-02-15 | Float trap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08219385A JPH08219385A (en) | 1996-08-30 |
| JP3530615B2 true JP3530615B2 (en) | 2004-05-24 |
Family
ID=12895135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05173495A Expired - Fee Related JP3530615B2 (en) | 1995-02-15 | 1995-02-15 | Float trap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3530615B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595689A (en) * | 2014-12-31 | 2015-05-06 | 广西壮族自治区特种设备检验研究院 | Annular float valve core type drain valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100734242B1 (en) * | 2006-10-25 | 2007-07-02 | 주식회사 동양밸브 | An air vent for valve |
| KR101997441B1 (en) * | 2012-02-14 | 2019-07-08 | 엘지전자 주식회사 | Expansion valve and chiller system including the same |
| CN109611681A (en) * | 2019-01-17 | 2019-04-12 | 同济大学 | Novel steam pipeline standpipe |
-
1995
- 1995-02-15 JP JP05173495A patent/JP3530615B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595689A (en) * | 2014-12-31 | 2015-05-06 | 广西壮族自治区特种设备检验研究院 | Annular float valve core type drain valve |
| CN104595689B (en) * | 2014-12-31 | 2017-01-04 | 广西壮族自治区特种设备检验研究院 | A kind of annular float valve core type drain valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08219385A (en) | 1996-08-30 |
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