JP2879525B2 - Thermo-responsive steam trap - Google Patents
Thermo-responsive steam trapInfo
- Publication number
- JP2879525B2 JP2879525B2 JP34637693A JP34637693A JP2879525B2 JP 2879525 B2 JP2879525 B2 JP 2879525B2 JP 34637693 A JP34637693 A JP 34637693A JP 34637693 A JP34637693 A JP 34637693A JP 2879525 B2 JP2879525 B2 JP 2879525B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- outlet
- diaphragm
- expansion medium
- 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 - Lifetime
Links
Landscapes
- Temperature-Responsive Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種蒸気使用機器や蒸
気配管で発生する復水を自動的に排出するスチ―ムトラ
ップに関し、特に、加熱されて膨脹し冷却されて収縮す
る媒体を含む温度制御機素を用いて、所望温度以下の流
体を系外へ排出する熱応動式スチ―ムトラップに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap for automatically discharging condensate generated in various steam-using equipment and steam pipes, and more particularly to a temperature trap including a medium which is heated and expanded, cooled and contracted. The present invention relates to a heat-responsive steam trap for discharging a fluid having a temperature lower than a desired temperature out of a system by using a control element.
【０００２】[0002]
【従来の技術】温度制御機素を用いた熱応動式スチ―ム
トラップは、例えば特公平１−３１０８０号公報に示さ
れている。当該公報から理解されるように、ケ―シング
で入口と弁室と出口を形成し、導出路を有する弁座部材
を弁室と出口の間に配置し、壁部材とダイヤフラム部材
と両部材の間に収容した膨脹媒体とダイヤフラムに連結
した弁部材とから成る温度制御機素を弁室内に配置し、
膨脹媒体の膨脹収縮によるダイヤフラムの変位によって
弁部材を弁座部材に離着座せしめて導出路の弁室側開口
端に形成した弁孔を開閉するものである。2. Description of the Related Art A thermally responsive steam trap using a temperature control element is disclosed, for example, in Japanese Patent Publication No. 1-31080. As understood from the publication, an inlet, a valve chamber, and an outlet are formed by casing, a valve seat member having an outlet path is disposed between the valve chamber and the outlet, and a wall member, a diaphragm member, and both members are formed. A temperature control element comprising an expansion medium housed therebetween and a valve member connected to the diaphragm is disposed in the valve chamber,
The valve member is detached and seated on the valve seat member by the displacement of the diaphragm due to the expansion and contraction of the expansion medium, and the valve hole formed at the valve chamber side opening end of the lead-out path is opened and closed.
【０００３】高温流体の流入によって弁室内が所定温度
以上になると、膨脹媒体が膨脹して内圧が増加する。ダ
イヤフラムが閉弁方向に変位せしめられ、弁部材が弁座
部材に着座して弁孔を閉止する。この閉弁によって蒸気
の流出を防止する。放熱等によって弁室内が所定温度以
下になると、膨脹媒体が収縮して内圧が減少する。ダイ
ヤフラムが開弁方向に変位せしめられ、弁部材が弁座部
材から離座して弁孔を開口する。この開弁によって復水
や空気を系外へ排出する。When the temperature inside the valve chamber exceeds a predetermined temperature due to the inflow of a high-temperature fluid, the expansion medium expands and the internal pressure increases. The diaphragm is displaced in the valve closing direction, and the valve member sits on the valve seat member to close the valve hole. This valve closing prevents the outflow of steam. When the temperature inside the valve chamber becomes lower than a predetermined temperature due to heat radiation or the like, the expansion medium contracts and the internal pressure decreases. The diaphragm is displaced in the valve opening direction, and the valve member separates from the valve seat member to open the valve hole. By this valve opening, condensate and air are discharged out of the system.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな様式の熱応動式スチ―ムトラップにあっては、膨脹
媒体の膨脹収縮温度を境にして小刻みに開閉弁を繰り返
し、復水がたらたらと排出されて蒸気漏れと見間違つた
り、弁部材と弁座部材が早期に摩耗して蒸気漏れを生じ
る問題があった。これは、開弁時には弁部材が対面する
弁孔内の流体圧力が出口側圧力に近い低圧となるため
に、流体圧力によって弁部材を開弁方向に作用せしめる
力が小さく、膨脹媒体の僅かな膨脹による僅かな内圧上
昇によって閉弁し、また膨脹媒体の僅かな収縮による僅
かな内圧低下によって開弁してしまうためである。However, in such a thermo-responsive steam trap of this type, the on-off valve is repeated in small increments at the boundary of the expansion and contraction temperature of the expansion medium, and condensate is exhausted. Therefore, there is a problem that the steam leak is mistaken for the steam leak, or the valve member and the valve seat member are worn out early to cause a steam leak. This is because, when the valve is opened, the fluid pressure in the valve hole facing the valve member becomes low pressure close to the outlet side pressure, so that the force that acts on the valve member in the valve opening direction by the fluid pressure is small, and the amount of the expansion medium is small. This is because the valve closes due to a slight increase in internal pressure due to expansion, and opens due to a slight decrease in internal pressure due to slight contraction of the expansion medium.
【０００５】従って、本発明の技術的課題は、間欠的な
開閉弁作動を行う熱応動式スチ―ムトラップを提供する
ことである。Accordingly, it is an object of the present invention to provide a heat-responsive steam trap which performs an intermittent on-off valve operation.
【０００６】[0006]
【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、ケ―シングで入
口と弁室と出口を形成し、導出路を有する弁座部材を弁
室と出口の間に配置し、壁部材とダイヤフラム部材と両
部材の間に収容した膨脹媒体とダイヤフラムに連結した
弁部材とから成る温度制御機素を弁室内に配置し、膨脹
媒体の膨脹収縮によるダイヤフラムの変位によって弁部
材を弁座部材に離着座せしめて導出路の弁室側開口端に
形成した弁孔を開閉する熱応動式スチ―ムトラップにお
いて、導出路が弁孔の下流側に弁孔よりも開口面積の小
さなオリフィスを有することを特徴とするものである。In order to solve the above-mentioned technical problems, the technical means of the present invention is to provide a valve seat member having an inlet, a valve chamber, and an outlet formed by casing, and having an outlet passage. Is disposed between the valve chamber and the outlet, and a temperature control element comprising a wall member, a diaphragm member, an expansion medium housed between the two members, and a valve member connected to the diaphragm is disposed in the valve chamber, In a thermally responsive steam trap which opens and closes a valve hole formed at a valve chamber side opening end of a lead-out passage by displacing a valve member to a valve seat member by displacement of a diaphragm due to expansion and contraction, the lead-out passage is located downstream of the valve hole. And an orifice having an opening area smaller than that of the valve hole.
【０００７】[0007]
【作用】上記の技術的手段の作用は下記の通りである。
導出路の弁孔下流側に弁孔よりも開口面積の小さなオリ
フィスを設けているので、開弁時には弁孔内の圧力が入
口側圧力に近い高圧となり、流体圧力による弁部材を開
弁方向に作用せしめる力を大きくすることができる。従
って、この大きな開弁力に打勝つ閉弁力が生じてから、
即ち膨脹媒体が充分に膨脹し内圧が充分に上昇してから
閉弁することとなる。閉弁すると弁孔内の圧力が出口側
圧力である低圧となるので、流体圧力による開弁力は小
さくなる。従って、充分に増大していた内圧が小さな開
弁力よりも小さくなってから、即ち膨脹媒体が充分に収
縮し内圧が充分に低下してから開弁することとなる。こ
のように、膨脹媒体が充分に膨脹し内圧が充分に上昇し
てから閉弁し、また膨脹媒体が充分に収縮し内圧が充分
に低下してから開弁するので、間欠的な開閉弁作動を行
うこととなる。The operation of the above technical means is as follows.
An orifice with a smaller opening area than the valve hole is provided on the downstream side of the valve hole in the outlet path. The acting force can be increased. Therefore, after a valve closing force that overcomes this large valve opening force is generated,
That is, the valve is closed after the expansion medium is sufficiently expanded and the internal pressure is sufficiently increased. When the valve is closed, the pressure in the valve hole becomes a low pressure which is the outlet side pressure, so that the valve opening force due to the fluid pressure is reduced. Therefore, the valve is opened after the sufficiently increased internal pressure becomes smaller than the small valve opening force, that is, after the expansion medium is sufficiently contracted and the internal pressure is sufficiently reduced. As described above, the valve is closed after the expansion medium is sufficiently expanded and the internal pressure is sufficiently increased, and the valve is opened after the expansion medium is sufficiently contracted and the internal pressure is sufficiently reduced. Will be performed.
【０００８】[0008]
【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）。本体１には同一軸上に入口２と出
口３が形成され、この入口２及び出口３と連通する弁室
４が本体１にボルト（図示せず）で締結された蓋部材５
によって形成される。本体１と蓋部材５によってケ―シ
ングが構成され、両者の間の気密は環状のガスケット６
で保たれる。入口２から弁室４に至る通路上にはスクリ
―ン７が介在され、ゴミ等の異物が補足される。An embodiment showing a specific example of the above technical means will be described (see FIG. 1). An inlet 2 and an outlet 3 are formed on the same axis on the main body 1, and a valve chamber 4 communicating with the inlet 2 and the outlet 3 is connected to the main body 1 by a bolt (not shown).
Formed by A casing is constituted by the main body 1 and the lid member 5, and the airtightness between the two is formed by an annular gasket 6.
Is kept in. A screen 7 is interposed on a passage extending from the inlet 2 to the valve chamber 4 to supplement foreign substances such as dust.
【０００９】出口３の弁室４側開口端に、弁室４と出口
３とを連通する導出路８が形成された弁座部材９がねじ
結合されている。導出路８は、弁室４側端の弁孔１０
と、弁孔１０とほぼ同じかそれ以上の流体通過面積に形
成された出口３側の通孔１１と、弁孔１０と通孔１１の
間で弁孔１０よりも小さな流体通過面積に形成されたオ
リフィス１２とから形成される。弁座部材９の上面には
環状溝１３が形成されている。環状溝の底壁１４は、下
記の下壁部材２４の下面とほぼ平行に、外側から内側に
向かって次第に低く形成され、また環状溝の内周壁１５
は、下記の弁部材２３方向に向かって上方内側に傾斜し
た傾斜面として形成されている。A valve seat member 9 having a lead-out passage 8 for communicating the valve chamber 4 with the outlet 3 is screwed to the opening end of the outlet 3 on the valve chamber 4 side. The outlet passage 8 is provided with a valve hole 10 at the end of the valve chamber 4 side.
A through hole 11 on the outlet 3 side formed with a fluid passage area substantially equal to or greater than the valve hole 10, and a fluid passage area smaller than the valve hole 10 between the valve holes 10 and 11. Orifice 12. An annular groove 13 is formed on the upper surface of the valve seat member 9. The bottom wall 14 of the annular groove is formed so as to be gradually lower from the outside toward the inside in substantially parallel with the lower surface of the lower wall member 24 described below.
Is formed as an inclined surface that is inclined upward and inward toward the valve member 23 described below.
【００１０】弁座部材９の上方に、温度制御機素１６が
配置される。温度制御機素１６は、注入口１７を有する
上壁部材１８と、注入口１７を密封する栓部材１９と、
上壁部材１８との間に収容室２０を形成するダイヤフラ
ム２１と、収容室２０に密封される膨脹媒体２２と、ダ
イヤフラム２１に固着され弁座部材９に離着座して弁孔
１０を開閉する弁部材２３と、ダイヤフラム２１の外周
縁を上壁部材との間に挟んで固着する下壁部材２４と、
上壁部材１８に固着されるストッパ―２５とから形成さ
れる。膨脹媒体２２は、水、水より沸点の低い液体、あ
るいはそれらの混合物で形成される。A temperature control element 16 is arranged above the valve seat member 9. The temperature control element 16 includes an upper wall member 18 having an inlet 17, a stopper member 19 for sealing the inlet 17,
A diaphragm 21 forming an accommodation chamber 20 with the upper wall member 18, an expansion medium 22 sealed in the accommodation chamber 20, and a valve 21 fixed to the diaphragm 21 and separated from and seated on the valve seat member 9 to open and close the valve hole 10. A valve member 23, a lower wall member 24 for fixing the outer peripheral edge of the diaphragm 21 between the upper wall member and the lower wall member 24,
And a stopper 25 fixed to the upper wall member 18. The expansion medium 22 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.
【００１１】温度制御機素１０は、本体１と弁座部材９
との間に挟んで固定された有底円筒形状の取付部材２６
内に収容され、蓋部材５と上壁部材１８との間に配置さ
れたコイルスプリング２７によって下方に付勢され、取
付部材２６の内面に形成された段部２８に下壁部材２４
の外周下面が当接保持されている。取付部材２６には、
底壁に両側及び手前側と向側に合計４つ、また周壁の上
部に両側及び手前側と向側に合計４つの復水通過窓２
９、３０が開けられている。The temperature control element 10 comprises a main body 1 and a valve seat member 9.
Cylindrical mounting member 26 fixed between
The lower wall member 24 is urged downward by a coil spring 27 disposed between the lid member 5 and the upper wall member 18, and a step 28 formed on the inner surface of the mounting member 26.
Is held in contact with the lower surface of the outer periphery. The mounting member 26 includes
A total of four condensate passage windows 2 on the bottom wall on both sides, the front side and the opposite side, and a total of four on both sides, the front side and the opposite side on the peripheral wall
9 and 30 are open.
【００１２】本実施例での作動は下記の通りである。入
口２から低温流体が流入し、弁室４内が所定温度以下の
場合、膨脹媒体２２は収縮し、ダイヤフラム２１が上方
に変位し、弁部材２３が弁座部材９から離座して弁孔１
０を開口している。これによって低温の復水や空気が導
出路８から出口３へ排出される。この開弁時にはオリフ
ィス１２の作用によって弁孔１０内の圧力が入口２側圧
力に近い高圧となり、流体圧力による弁部材２３を開弁
方向に付勢する力が大きくなっている。また、排出流体
は弁座部材９の上面を通過するときに内周壁１５によっ
て弁部材２３方向に流れを変換し、弁部材２３に衝突し
て開弁方向の力を作用せしめるので、このことによって
も、弁部材２３を開弁方向に付勢する力が大きくなって
いる。The operation of this embodiment is as follows. When a low-temperature fluid flows in from the inlet 2 and the temperature inside the valve chamber 4 is lower than a predetermined temperature, the expansion medium 22 contracts, the diaphragm 21 is displaced upward, and the valve member 23 separates from the valve seat member 9 to open the valve hole. 1
0 is open. As a result, low-temperature condensate and air are discharged from the outlet 8 to the outlet 3. At the time of opening the valve, the pressure in the valve hole 10 becomes a high pressure close to the pressure on the inlet 2 side due to the action of the orifice 12, and the force for urging the valve member 23 in the valve opening direction by the fluid pressure increases. Further, when the discharged fluid passes through the upper surface of the valve seat member 9, the inner peripheral wall 15 converts the flow in the direction of the valve member 23, and collides with the valve member 23 to exert a force in the valve opening direction. Also, the force for urging the valve member 23 in the valve opening direction is large.
【００１３】低温流体の排出によって入口２から流入す
る流体温度が上昇し、弁室４内が所定温度以上になる
と、膨脹媒体２２は膨脹して内圧が増加する。そして流
体圧力による大きな開弁力に打勝つと、ダイヤフラム２
１を下方に変位せしめ、弁部材２３を弁座部材９に着座
せしめて弁孔１０を閉止する。これによって蒸気の漏出
を防止する。この閉弁時には弁孔１０内の圧力が出口３
の圧力まで低下し、弁部材２３を開弁方向に付勢する力
が小さくなっている。また、排出流体の衝突による弁部
材２３を開弁方向に付勢する力も作用しない。When the temperature of the fluid flowing from the inlet 2 rises due to the discharge of the low-temperature fluid and the inside of the valve chamber 4 reaches a predetermined temperature or higher, the expansion medium 22 expands and the internal pressure increases. When the large valve opening force due to the fluid pressure is overcome, the diaphragm 2
1 is displaced downward, the valve member 23 is seated on the valve seat member 9, and the valve hole 10 is closed. This prevents vapor leakage. When the valve is closed, the pressure in the valve hole 10 increases
, And the force urging the valve member 23 in the valve opening direction decreases. Further, no force acts on the valve member 23 in the valve opening direction due to the collision of the discharged fluid.
【００１４】放熱によって弁室４内が所定温度以下にな
ると、膨脹媒体２２は収縮して内圧が低下する。そして
流体圧力による小さな開弁力よりも小さくなると、弁部
材２３が弁座部材９から離座せしめられて弁孔１０を開
口する。When the temperature inside the valve chamber 4 becomes lower than a predetermined temperature due to heat radiation, the expansion medium 22 contracts and the internal pressure decreases. When the valve opening force becomes smaller than the small valve opening force due to the fluid pressure, the valve member 23 is separated from the valve seat member 9 to open the valve hole 10.
【００１５】[0015]
【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る熱応動式スチ―ムトラップは、
導出路の弁孔下流側に弁孔よりも開口面積の小さなオリ
フィスを設けることによって、間欠的な開閉弁作動を行
うことができるので、復水排出時に蒸気漏れと見間違う
ことがなく、また弁部材と弁座部材の摩耗が生じ難くな
り長期間に渡って良好な開閉弁作動を行うことができ
る。The present invention has the following specific effects. As described above, the thermally responsive steam trap according to the present invention comprises:
By providing an orifice with a smaller opening area than the valve hole on the downstream side of the valve hole in the outlet path, intermittent on-off valve operation can be performed, so that it is not mistaken for steam leakage at the time of condensate discharge, and the valve Abrasion of the member and the valve seat member is less likely to occur, and a favorable on / off valve operation can be performed over a long period of time.
【図１】本発明の実施例の熱応動式スチ―ムトラップの
断面図である。FIG. 1 is a sectional view of a thermally responsive steam trap according to an embodiment of the present invention.
１ 本体 ２ 入口 ３ 出口 ４ 弁室 ５ 蓋部材 ８ 導出路 ９ 弁座部材 １０ 弁孔 １１ 通孔 １２ オリフィス １３ 環状溝 １４ 底壁 １５ 内周壁 １６ 温度制御機素 １８ 上壁部材 ２０ 収容室 ２１ ダイヤフラム ２２ 膨脹媒体 ２３ 弁部材 ２４ 下壁部材 ２６ 取付部材 DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Valve room 5 Lid member 8 Outlet 9 Valve seat member 10 Valve hole 11 Through hole 12 Orifice 13 Annular groove 14 Bottom wall 15 Inner peripheral wall 16 Temperature control element 18 Top wall member 20 Storage chamber 21 Diaphragm 22 expansion medium 23 valve member 24 lower wall member 26 mounting member
Claims (1)
し、導出路を有する弁座部材を弁室と出口の間に配置
し、壁部材とダイヤフラム部材と両部材の間に収容した
膨脹媒体とダイヤフラムに連結した弁部材とから成る温
度制御機素を弁室内に配置し、膨脹媒体の膨脹収縮によ
るダイヤフラムの変位によって弁部材を弁座部材に離着
座せしめて導出路の弁室側開口端に形成した弁孔を開閉
するものにおいて、導出路が弁孔の下流側に弁孔よりも
開口面積の小さなオリフィスを有することを特徴とする
熱応動式スチ―ムトラップ。An inlet, a valve chamber, and an outlet are formed by casing, a valve seat member having an outlet path is disposed between the valve chamber and the outlet, and is housed between the wall member, the diaphragm member, and both members. A temperature control element comprising an expansion medium and a valve member connected to the diaphragm is disposed in the valve chamber, and the diaphragm is displaced by the expansion and contraction of the expansion medium so that the valve member is detached and seated on the valve seat member, and a valve chamber side of the lead-out path is provided. A thermally responsive steam trap for opening and closing a valve hole formed at an open end, wherein an outlet passage has an orifice having a smaller opening area than the valve hole downstream of the valve hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34637693A JP2879525B2 (en) | 1993-12-21 | 1993-12-21 | Thermo-responsive steam trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34637693A JP2879525B2 (en) | 1993-12-21 | 1993-12-21 | Thermo-responsive steam trap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07174295A JPH07174295A (en) | 1995-07-11 |
| JP2879525B2 true JP2879525B2 (en) | 1999-04-05 |
Family
ID=18383007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34637693A Expired - Lifetime JP2879525B2 (en) | 1993-12-21 | 1993-12-21 | Thermo-responsive steam trap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2879525B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101730231B1 (en) * | 2015-03-27 | 2017-04-25 | 최영환 | Apparatus for removing pressure of sealed type water tank and Electric boiler for hot water mat having the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191646B (en) * | 2017-06-07 | 2023-09-22 | 北京建筑大学 | Self-operated constant temperature difference control valve, system and working method thereof |
| CN115507520B (en) * | 2022-09-30 | 2024-06-28 | 珠海格力电器股份有限公司 | Valve body assembly, air conditioning system and control method of air conditioning system |
-
1993
- 1993-12-21 JP JP34637693A patent/JP2879525B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101730231B1 (en) * | 2015-03-27 | 2017-04-25 | 최영환 | Apparatus for removing pressure of sealed type water tank and Electric boiler for hot water mat having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07174295A (en) | 1995-07-11 |
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