JPH1163389A - Thermally actuated steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermally actuated steam trap that can rapidly drain a large quantity of a low temperature fluid. SOLUTION: An inlet 4, a valve chamber 3 and an outlet 5 are formed at valve casings 1, 2. A first lead-out path 7 of large bore is formed between the valve chamber 3 and the outlet 5. A temperature control element 9 of such constitution that the outer peripheral edge of a diaphragm is secured between an upper wall member 12 and a lower wall member 17, that an expansion medium 22 is filled between the upper wall member 12 and the diaphragm 14 and that a valve member 16 is fitted to the diaphragm 14, is arranged in the valve chamber 3. A fluid passage 30 is formed at the outer periphery of the temperature control element 9. A temperature actuated member 24 is provided to seat the temperature control element 9 on the first lead-out path 7 at the time of high temperature and to separate the temperature control element 9 from the first lend-out path 7. A first seal face 26, a fluid passing hole 20 and a second lead-out path 27 of small bore are formed at the lower wall member 17, and a second seal face 28 is formed at the valve member 16.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】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、蒸気と復水で加熱冷却されその
温度に応じて膨脹収縮する媒体を含む温度制御機素を用
いて、所望温度以下の復水を系外へ排出する熱応動式ス
チ―ムトラップに関する。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 steam trap which is heated and cooled by steam and condensate and expands in accordance with the temperature. The present invention relates to a thermo-responsive steam trap for discharging condensate below a desired temperature out of the system by using a temperature control element containing a contracting medium.

【０００２】[0002]

【従来の技術】熱応動式スチ―ムトラップの基本的構成
は、例えば、特開平８−２８７８７号公報から公知であ
る。当該公報から理解されるように、入口と弁室と出口
を形成した弁ケ―シングと、弁室と出口を連通する導出
路を形成した弁座部材と、上下二つの壁部材の間にダイ
ヤフラムの外周縁を固着して上壁部材とダイヤフラムの
間に膨脹媒体を封入しダイヤフラムに弁部材を取り付け
た温度制御機素を具備し、弁座部材を弁室と出口の間に
取り付け、弁部材を弁座部材に対面させて温度制御機素
を弁室に取り付け、弁ケ―シングの内周壁と温度制御機
素の外周との間に流体通過用の隙間を設け、弁部材の弁
座部材への着座時に弁座部材の導出路を閉止するシ―ル
面を弁部材に形成したものである。2. Description of the Related Art The basic structure of a thermally responsive steam trap is known, for example, from Japanese Patent Application Laid-Open No. 8-28787. As understood from the publication, a valve casing forming an inlet, a valve chamber, and an outlet, a valve seat member forming an outlet path communicating the valve chamber with the outlet, and a diaphragm between the upper and lower two wall members. A temperature control element in which an expansion medium is sealed between the upper wall member and the diaphragm by fixing an outer peripheral edge of the valve member, and a valve member is attached to the diaphragm; a valve seat member is attached between the valve chamber and the outlet; Facing the valve seat member, mounting the temperature control element in the valve chamber, providing a clearance for fluid passage between the inner peripheral wall of the valve casing and the outer circumference of the temperature control element, and providing a valve seat member of the valve member. The seat surface for closing the lead-out path of the valve seat member when seated on the valve member is formed on the valve member.

【０００３】弁室内の温度が上昇すると膨脹媒体が膨脹
し、ダイヤフラムを介して弁部材が弁座部材に着座して
導出路を閉止する。これによって、蒸気の漏出を防止す
る。弁室内の温度が低下すると膨脹媒体が収縮し、弁部
材が弁座部材から離座して導出路を開口する。これによ
って、復水を系外へ排出する。When the temperature inside the valve chamber rises, the expansion medium expands, and the valve member is seated on the valve seat member via the diaphragm to close the outlet passage. This prevents leakage of steam. When the temperature in the valve chamber decreases, the expansion medium contracts, and the valve member separates from the valve seat member to open the outlet passage. As a result, the condensate is 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、温度
制御機素によって開閉できる導出路の開口面積には限り
があるので、始動時に多量に溜っている低温流体の排出
に時間が掛かる問題があった。However, in such a thermo-responsive steam trap of this type, the opening area of the lead-out passage which can be opened and closed by the temperature control element is limited, so that a large amount is required at the time of starting. There is a problem that it takes time to discharge the accumulated low-temperature fluid.

【０００５】従って、本発明の技術的課題は、多量の低
温流体を素早く排出できる熱応動式スチ―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 thermo-responsive steam trap capable of rapidly discharging a large amount of low-temperature fluid.

【０００６】[0006]

【課題を解決するための手段】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
に入口と弁室と出口を形成し、弁室と出口の間に大口径
の第１導出路を形成し、上下二つの壁部材の間にダイヤ
フラムの外周縁を固着して上壁部材とダイヤフラムの間
に膨脹媒体を封入しダイヤフラムに弁部材を取り付けた
温度制御機素を弁室内に配置し、弁ケ―シングの内周壁
と温度制御機素の外周との間に流体通過通路を形成し、
温度制御機素を高温時に第１導出路に着座させ低温時に
第１導出路から離座させる温度応動部材を設け、温度制
御機素の第１導出路への着座時に第１導出路を閉止する
第１シ―ル面を下壁部材に形成し、下壁部材の第１シ―
ル面の外側に流体通過孔を形成し、下壁部材の第１シ―
ル面の内側に小口径の第２導出路を形成し、弁部材の下
壁部材への着座時に第２導出路を閉止する第２シ―ル面
を弁部材に形成した熱応動式スチ―ムトラップにある。SUMMARY OF THE INVENTION The technical solution of the present invention taken to solve the above-mentioned technical problem is to form an inlet, a valve chamber and an outlet in a valve casing, and to form a valve housing between the valve chamber and the outlet. Temperature control in which a large-diameter first outlet path is formed, an outer peripheral edge of a diaphragm is fixed between two upper and lower wall members, an expansion medium is sealed between the upper wall member and the diaphragm, and a valve member is attached to the diaphragm. Placing the element in the valve chamber, forming a fluid passage between the inner peripheral wall of the valve casing and the outer periphery of the temperature control element,
A temperature responsive member is provided for seating the temperature control element on the first outlet path when the temperature is high and detaching the temperature control element from the first outlet path when the temperature is low, and closing the first outlet path when the temperature control element is seated on the first outlet path. The first seal surface is formed on the lower wall member, and the first seal surface of the lower wall member is formed.
A fluid passage hole is formed outside the surface of the
A thermally responsive steel plate having a small-diameter second lead-out passage formed inside the valve surface and a second seal surface formed on the valve member for closing the second lead-out passage when the valve member is seated on the lower wall member. In the mud trap.

【０００７】[0007]

【発明の実施の形態】始動時、弁室内は低温であり、膨
脹媒体は収縮し、弁部材が下壁部材から離座し、弁部材
の第２シ―ル面が第２導出路を開口している。このと
き、温度応動部材は温度制御機素を第１導出路から離座
せしめて、下壁部材の第１シ―ル面が第１導出路を開口
している。これにより、多量の低温流体が大口径の第１
導出路から素早く排出される。DESCRIPTION OF THE PREFERRED EMBODIMENTS At start-up, the interior of the valve chamber is cold, the expansion medium contracts, the valve member separates from the lower wall member, and the second sealing surface of the valve member opens the second outlet passage. doing. At this time, the temperature responsive member moves the temperature control element away from the first lead-out path, and the first seal surface of the lower wall member opens the first lead-out path. As a result, a large amount of low temperature fluid
It is quickly discharged from the outlet.

【０００８】低温流体の排出によって弁室内温度が高く
なってくると、温度応動部材は温度制御機素を第１導出
路に着座せしめ、下壁部材の第１シ―ル面が第１導出路
を閉止する。また、弁室内温度の上昇によって膨脹媒体
が膨脹し、弁部材が下壁部材に着座し、弁部材の第２シ
―ル面が第２導出路を閉止する。これにより、蒸気の漏
出を防止する。When the temperature in the valve chamber rises due to the discharge of the low-temperature fluid, the temperature responsive member causes the temperature control element to be seated on the first lead-out passage, and the first seal surface of the lower wall member becomes the first lead-out passage. Is closed. Further, the expansion medium expands due to the rise in the temperature of the valve chamber, the valve member is seated on the lower wall member, and the second seal surface of the valve member closes the second lead-out path. This prevents leakage of steam.

【０００９】[0009]

【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）。図１において、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―シングを形成する。上ケ―シング１には弁室３
に連通する入口４を形成し、下ケ―シング２には弁室３
から連通する出口５を形成する。弁室３と出口５の間の
隔壁６に、弁室３と出口５を連通する大口径の第１導出
路７を形成する。An embodiment showing a specific example of the above technical means will be described (see FIG. 1). In FIG. 1, an upper casing 1 and a lower casing 2 are screwed together to form a valve casing having a valve chamber 3 therein. Valve case 3 for upper casing 1
An inlet 4 communicating with the valve chamber 3 is formed in the lower casing 2.
An outlet 5 communicating with the outlet 5 is formed. On the partition wall 6 between the valve chamber 3 and the outlet 5, a large-diameter first outlet path 7 that connects the valve chamber 3 and the outlet 5 is formed.

【００１０】弁室３内に、温度制御機素９を配置する。
温度制御機素９は、注入口１１を形成した上壁部材１２
と、ダイヤフラム１４と、弁部材１６と、流体通過孔２
０と小口径の第２導出路２７を開けた下壁部材１７と、
上壁部材１２とダイヤフラム１４の間に封入した膨脹媒
体２２とで構成する。第２導出路２７は下壁部材１３の
中心に開口し、流体通過孔２０は第２導出路２７の周囲
に４つ開口している。A temperature control element 9 is disposed in the valve chamber 3.
The temperature control element 9 includes an upper wall member 12 having an inlet 11 formed therein.
, Diaphragm 14, valve member 16, fluid passage hole 2
A lower wall member 17 having opened a second outlet passage 27 having a small diameter of 0;
It is composed of an expansion medium 22 sealed between the upper wall member 12 and the diaphragm 14. The second outlet path 27 opens at the center of the lower wall member 13, and four fluid passage holes 20 open around the second outlet path 27.

【００１１】ダイヤフラム１４と弁部材１６を溶接（参
照番号１８）する。上壁部材１２とダイヤフラム１４と
下壁部材１７の夫々の外周縁を溶接（参照番号２１）す
る。上壁部材１２とダイヤフラム１４との間の密閉空間
に注入口１１から膨脹媒体２２を注入し、栓部材２３で
塞ぐ。膨脹媒体２２は、水、水より沸点の低い液体、或
いはそれらの混合物で形成する。The diaphragm 14 and the valve member 16 are welded (reference numeral 18). The outer peripheral edges of the upper wall member 12, the diaphragm 14, and the lower wall member 17 are welded (reference numeral 21). The expansion medium 22 is injected into the closed space between the upper wall member 12 and the diaphragm 14 from the injection port 11 and closed with the plug member 23. The expansion medium 22 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

【００１２】温度制御機素９は、上ケ―シング１と上壁
部材１２とに両端を固定した形状記憶合金でコイル状に
形成した温度応動部材２４に連結する。温度応動部材２
４は高温時に図示のように伸長して温度制御機素９を押
し下げて第１導出路７に着座せしめ、低温時に収縮して
温度制御機素９を引き上げて第１導出路７から離座せし
める。温度制御機素９の外周を下ケ―シング２の内周に
形成した複数個のリブ２５で案内する。複数個のリブ２
５の間が流体通過通路３０となる。温度制御機素９の第
１導出路７への着座時に第１導出路７を閉止する第１シ
―ル面２６を下壁部材１７に形成し、第１シ―ル面２６
の外側に流体通過孔２０を形成し、第１シ―ル面２６の
内側に小口径の第２導出路２７を形成する。弁部材１６
の下壁部材１７への着座時に第２導出路２７を閉止する
第２シ―ル面２８を弁部材１６に形成する。The temperature control element 9 is connected to a temperature responsive member 24 formed in a coil shape from a shape memory alloy having both ends fixed to the upper casing 1 and the upper wall member 12. Temperature responsive member 2
4 expands as shown in the figure at the time of high temperature, pushes down the temperature control element 9 and seats it on the first outlet path 7, contracts at the time of low temperature, pulls up the temperature control element 9 and separates it from the first outlet path 7. . The outer periphery of the temperature control element 9 is guided by a plurality of ribs 25 formed on the inner periphery of the lower casing 2. Multiple ribs 2
The space between 5 is the fluid passage passage 30. When the temperature control element 9 is seated on the first outlet path 7, a first seal surface 26 for closing the first outlet path 7 is formed on the lower wall member 17, and the first seal surface 26 is formed.
A fluid passage hole 20 is formed outside the first seal surface 26, and a small-diameter second lead-out passage 27 is formed inside the first seal surface 26. Valve member 16
A second seal surface 28 that closes the second lead-out passage 27 when seated on the lower wall member 17 is formed in the valve member 16.

【００１３】始動時、弁室３内は低温であり、膨脹媒体
２２は収縮し、弁部材１６が下壁部材１７から離座し、
弁部材１６の第２シ―ル面２８が第２導出路２７を開口
している。このとき、温度応動部材２４は温度制御機素
９を第１導出路７から離座せしめて、下壁部材１７の第
１シ―ル面２６が第１導出路７を開口している。これに
より、多量の低温流体が大口径の第１導出路７から素早
く排出される。At the time of starting, the temperature in the valve chamber 3 is low, the expansion medium 22 contracts, the valve member 16 is separated from the lower wall member 17,
The second sealing surface 28 of the valve member 16 opens the second lead-out passage 27. At this time, the temperature responsive member 24 moves the temperature control element 9 away from the first lead-out path 7, and the first seal surface 26 of the lower wall member 17 opens the first lead-out path 7. Thereby, a large amount of low-temperature fluid is quickly discharged from the large-diameter first outlet path 7.

【００１４】低温流体の排出によって弁室３内温度が高
くなってくると、温度応動部材２４は温度制御機素９を
第１導出路７に着座せしめ、下壁部材１７の第１シ―ル
面２６が第１導出路７を閉止する。また弁室３内の温度
が上昇すると膨脹媒体２２が膨脹する。膨脹媒体２２の
膨脹によってダイヤフラム１４が下方に変位し、弁部材
１６が下壁部材１７に着座する。弁部材１６が下壁部材
１７に着座すると、弁部材１６の第２シ―ル面２８が第
２導出路８を閉止する。これによって蒸気の漏出を防止
する。When the temperature inside the valve chamber 3 rises due to the discharge of the low-temperature fluid, the temperature responsive member 24 causes the temperature control element 9 to be seated on the first lead-out passage 7 and the first seal of the lower wall member 17 to be seated. The surface 26 closes the first outlet path 7. When the temperature in the valve chamber 3 rises, the expansion medium 22 expands. The diaphragm 14 is displaced downward by the expansion of the expansion medium 22, and the valve member 16 is seated on the lower wall member 17. When the valve member 16 is seated on the lower wall member 17, the second seal surface 28 of the valve member 16 closes the second outlet passage 8. This prevents vapor leakage.

【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、
始動時に大口径の導出路を開口させることにより多量の
低温流体を素早く排出できる。The present invention has the following specific effects. As described above, the thermally responsive steam trap according to the present invention comprises:
A large amount of low-temperature fluid can be quickly discharged by opening a large-diameter outlet passage at the time of starting.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の熱応動式スチ―ムトラップの実施例の
断面図FIG. 1 is a sectional view of an embodiment of a thermally responsive steam trap of the present invention.

【符号の説明】[Explanation of symbols]

１ 上ケ―シング ２ 下ケ―シング ３ 弁室 ４ 入口 ５ 出口 ７ 第１導出路 ９ 温度制御機素 １２ 上壁部材 １４ ダイヤフラム １６ 弁部材 １７ 下壁部材 ２０ 流体通過孔 ２２ 膨脹媒体 ２４ 温度応動部材 ２６ 第１シ―ル面 ２７ 第２導出路 ２８ 第２シ―ル面 ３０ 流体通過通路 DESCRIPTION OF SYMBOLS 1 Upper casing 2 Lower casing 3 Valve room 4 Inlet 5 Outlet 7 1st lead-out path 9 Temperature control element 12 Upper wall member 14 Diaphragm 16 Valve member 17 Lower wall member 20 Fluid passage hole 22 Expansion medium 24 Temperature response Member 26 First seal surface 27 Second lead-out path 28 Second seal surface 30 Fluid passage passage

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 弁ケ―シングに入口と弁室と出口を形成
し、弁室と出口の間に大口径の第１導出路を形成し、上
下二つの壁部材の間にダイヤフラムの外周縁を固着して
上壁部材とダイヤフラムの間に膨脹媒体を封入しダイヤ
フラムに弁部材を取り付けた温度制御機素を弁室内に配
置し、弁ケ―シングの内周壁と温度制御機素の外周との
間に流体通過通路を形成し、温度制御機素を高温時に第
１導出路に着座させ低温時に第１導出路から離座させる
温度応動部材を設け、温度制御機素の第１導出路への着
座時に第１導出路を閉止する第１シ―ル面を下壁部材に
形成し、下壁部材の第１シ―ル面の外側に流体通過孔を
形成し、下壁部材の第１シ―ル面の内側に小口径の第２
導出路を形成し、弁部材の下壁部材への着座時に第２導
出路を閉止する第２シ―ル面を弁部材に形成したことを
特徴とする熱応動式スチ―ムトラップ。1. An inlet, a valve chamber, and an outlet are formed in a valve casing, a first outlet passage having a large diameter is formed between the valve chamber and the outlet, and an outer peripheral edge of a diaphragm is formed between upper and lower wall members. The temperature control element having the expansion member sealed between the upper wall member and the diaphragm and the valve member attached to the diaphragm is disposed in the valve chamber, and the inner peripheral wall of the valve casing and the outer periphery of the temperature control element are disposed. And a temperature responsive member for seating the temperature control element in the first lead-out path when the temperature is high and separating the temperature control element from the first lead-out path when the temperature is low, to the first lead-out path of the temperature control element. A first seal surface for closing the first lead-out path at the time of seating is formed on the lower wall member, and a fluid passage hole is formed outside the first seal surface of the lower wall member, and the first seal surface of the lower wall member is formed. Small diameter second inside seal surface
A thermally responsive steam trap, wherein a second sealing surface for forming a lead-out passage and closing the second lead-out passage when the valve member is seated on a lower wall member is formed in the valve member.