JPH10318494A - Heat responding steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat responding steam trap which can surely close a lead out path. SOLUTION: An inlet 4, valve chamber 3 and an outlet 5 are formed by an upper/lower casing 1, 2. In the valve chamber 3, a temperature control element 10 is arranged. The temperature control element 10 is formed by fixing a peripheral edge of a wall member 12 and a diaphragm 15 to form an internal space 14, sealing it with an expansion medium 16, arranging a disk spring 21 energizing the diaphragm 15 in a valve closing direction between the wall member 12 and the diaphragm 15, and connecting a valve member 18 to the diaphragm 15. The diaphragm 15 is displaced by extending/contracting the expansion medium 16, so as to drive the valve member 18, a lead out path 7 formed in an opening end in a side of the valve chamber 3 of the outlet 5 is opened/closed. By applying elastic force of the disk spring 21 as valve closing force, the lead out path 7 can be surely closed.

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、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 including a medium which is heated, 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、例えば特公昭６０−４６３１８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、壁部材とダイヤフラム
の外周縁を固着して形成した内部空間に膨脹媒体を封入
すると共にダイヤフラムに弁部材を連結した温度制御機
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駆動して出口の弁室側開
口端に形成した導出路を開閉するようにしたものであ
る。膨脹媒体１６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。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. 60-46318. As understood from the publication, an inlet, a valve chamber, and an outlet are formed by casing, an expansion medium is sealed in an internal space formed by fixing a wall member and an outer peripheral edge of the diaphragm, and a valve member is mounted on the diaphragm. A connected temperature control element is disposed in a valve chamber, and a valve member is driven by displacement of a diaphragm due to expansion and contraction of an expansion medium to open and close an outlet path formed at an opening end of a valve chamber at an outlet. . The expansion medium 16 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

【０００３】[0003]

【発明が解決しようとする課題】弁室内に所定温度以上
の高温流体が流入してくると、膨脹媒体が膨脹して内部
空間の圧力が上昇し、ダイヤフラムが入口側の流体圧力
に抗して閉弁方向に変位して弁部材が導出路を閉止す
る。これによって、蒸気の排出を防止する。所定温度以
下の低温流体が流入してくると、膨脹媒体が収縮して内
部空間の圧力が降下し、ダイヤフラムが入口側の流体圧
力によって開弁方向に変位して弁部材が導出路を開口す
る。これによって、復水や空気を系外へ排出する。When a high-temperature fluid having a temperature equal to or higher than a predetermined temperature flows into the valve chamber, the expansion medium expands and the pressure in the internal space increases, and the diaphragm opposes the fluid pressure on the inlet side. The valve member is displaced in the valve closing direction to close the lead-out path. This prevents the discharge of steam. When a low-temperature fluid of a predetermined temperature or less flows, the expansion medium contracts and the pressure in the internal space drops, and the diaphragm is displaced in the valve opening direction by the fluid pressure on the inlet side, and the valve member opens the outlet passage. . As a result, condensate and air are discharged out of the system.

【０００４】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、膨脹媒体として水や水よ
り沸点の少し低い液体やそれらの混合物を用いた場合に
導出路を完全閉止できず蒸気漏れを生じる問題があっ
た。これは、膨脹媒体の膨脹によって上昇する内部空間
の圧力が入口側の流体圧力と同等あるいは入口側の流体
圧力よりも少し高い程度であるために、導出路を閉止す
るための閉弁力が弱いためである。[0004] However, in such a thermo-responsive steam trap of this type, when water, a liquid having a boiling point slightly lower than water, or a mixture thereof is used as the expansion medium, the outlet path cannot be completely closed, and the steam cannot be completely closed. There was a problem that caused leakage. This is because the pressure in the internal space that rises due to the expansion of the expansion medium is equal to or slightly higher than the fluid pressure on the inlet side, so that the valve closing force for closing the outlet path is weak. That's why.

【０００５】従って、本発明の技術的課題は、導出路を
確実に閉止できる熱応動式スチ―ムトラップを提供する
ことである。[0005] Accordingly, it is an object of the present invention to provide a heat-responsive steam trap that can reliably close an outlet passage.

【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、ケ―シングで
入口と弁室と出口を形成し、壁部材とダイヤフラムの外
周縁を固着して形成した内部空間に膨脹媒体を封入する
と共にダイヤフラムに弁部材を連結した温度制御機素を
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駆動して出口の弁室側開口端
に形成した導出路を開閉するものにおいて、ダイヤフラ
ムを閉弁方向に付勢する弾性部材を内部空間に配置した
ことを特徴とする熱応動式スチ―ムトラップにある。In order to solve the above technical problems, the technical means of the present invention is to form an inlet, a valve chamber, and an outlet by casing, and to form an outer peripheral edge of a wall member and a diaphragm. A temperature control element having a valve member connected to a diaphragm is arranged in a valve chamber, and the valve member is driven by displacement of the diaphragm due to expansion and contraction of the expansion medium, and an outlet is provided. The thermoresponsive steam trap is characterized in that an elastic member for urging the diaphragm in the valve closing direction is disposed in the internal space, for opening and closing the outlet path formed at the valve chamber side opening end of the steam trap.

【０００７】[0007]

【発明の実施の形態】本発明の熱応動式スチ―ムトラッ
プは、ダイヤフラムを閉弁方向に付勢する弾性部材を内
部空間に配置している。そのため、膨脹媒体の膨脹によ
って上昇する内部空間の圧力と弾性部材の弾性力によ
り、ダイヤフラムが入口側の流体圧力に抗して閉弁方向
に変位して弁部材が導出路を閉止する。これにより、導
出路を確実に閉止でき蒸気漏れを生じることがない。BEST MODE FOR CARRYING OUT THE INVENTION In a heat-responsive steam trap of the present invention, an elastic member for urging a diaphragm in a valve closing direction is disposed in an internal space. Therefore, the diaphragm is displaced in the valve closing direction against the fluid pressure on the inlet side by the pressure of the internal space and the elastic force of the elastic member that rise due to the expansion of the expansion medium, and the valve member closes the outlet passage. As a result, the lead-out path can be reliably closed, and no steam leakage occurs.

【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）。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。入口４と出口５は同軸に形成
されている。下ケ―シング２の横断壁６に、弁室３と出
口５を連通する導出路７を有する弁座部材８がねじ結合
される。An embodiment showing a specific example of the above technical means will be described (see FIG. 1). Upper case 1 and lower case 2
Are screwed together to form a casing having a valve chamber 3 therein. The upper case 1 has an inlet 4 and the lower case 2 has an outlet 5. The inlet 4 and the outlet 5 are formed coaxially. A valve seat member 8 having an outlet 7 communicating the valve chamber 3 and the outlet 5 is screwed to the transverse wall 6 of the lower casing 2.

【０００９】弁座部材８の上方に温度制御機素１０が配
される。温度制御機素１０は、注入口１１を有する壁部
材１２と、注入口１１を密封する栓部材１３と、壁部材
１２との間に内部空間１４を形成するダイヤフラム１５
と、内部空間１４に密封した膨脹媒体１６と、ダイヤフ
ラム１５に溶接（参照番号１７の箇所）によって固着し
た弁部材１８と、ダイヤフラム１５の外周縁を壁部材１
２との間に挟んで溶接（参照番号１９）によって固着し
た下壁部材２０と、壁部材１２とダイヤフラム１５との
間に配されダイヤフラム１５を閉弁方向（弁座部材８方
向）に付勢する弾性部材としての皿バネ２１とで構成さ
れる。膨脹媒体１６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 10 is arranged above the valve seat member 8. The temperature control element 10 includes a wall member 12 having an inlet 11, a plug member 13 for sealing the inlet 11, and a diaphragm 15 forming an internal space 14 between the wall member 12.
An expansion medium 16 sealed in the internal space 14, a valve member 18 fixed to the diaphragm 15 by welding (reference numeral 17), and an outer peripheral edge of the diaphragm 15 to the wall member 1.
2 and a lower wall member 20 fixed by welding (reference numeral 19) and disposed between the wall member 12 and the diaphragm 15 to urge the diaphragm 15 in a valve closing direction (toward the valve seat member 8). And a disc spring 21 as an elastic member. The expansion medium 16 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

【００１０】温度制御機素１０は、下ケ―シング２に取
り付けられたバネ２２によって弁座部材８側に付勢さ
れ、下壁部材２０の下面外周が下ケ―シング２の内周に
形成された複数個のリブ２３の段部に当たって保持され
ている。参照番号２４は、上ケ―シング１と下ケ―シン
グ２の間に挟んで固定された、異物を捕捉するめたのス
クリ―ンである。The temperature control element 10 is urged toward the valve seat member 8 by a spring 22 attached to the lower casing 2, and the outer periphery of the lower surface of the lower wall member 20 is formed on the inner periphery of the lower casing 2. The ribs 23 are held against the steps of the plurality of ribs 23. Reference numeral 24 denotes a screen for capturing foreign matter, which is fixed between the upper case 1 and the lower case 2.

【００１１】本実施例での作動は下記の通りである。弁
室３内の流体温度が放熱により所定値よりも低くなる
か、入口４から弁室３内に低温の流体が流入する場合、
膨脹媒体１６は収縮する。ダイヤフラム１５が入口４側
の流体圧力によって開弁方向に変位せしめられ、弁部材
１８が弁座部材８から離座して導出路７を開口する。こ
れによって低温の復水や空気が出口５から排出される。The operation of this embodiment is as follows. When the fluid temperature in the valve chamber 3 becomes lower than a predetermined value due to heat radiation, or when a low-temperature fluid flows into the valve chamber 3 from the inlet 4,
The expansion medium 16 contracts. The diaphragm 15 is displaced in the valve opening direction by the fluid pressure on the inlet 4 side, and the valve member 18 separates from the valve seat member 8 to open the outlet passage 7. Thereby, low-temperature condensate and air are discharged from the outlet 5.

【００１２】低温流体の排出によって弁室３内に流入し
てくる流体の温度が高くなってくると、膨脹媒体１６は
膨脹する。内部空間１４の圧力上昇と皿バネ２１の弾性
力によってダイヤフラム１５が入口４側の流体圧力に抗
して閉弁方向に変位せしめられ、弁部材１８が弁座部材
８に着座して導出路７を閉止する。これによって蒸気の
漏出を防止する。皿バネ２１の弾性力を閉弁力として加
えているので、導出路７を確実に閉止できる。When the temperature of the fluid flowing into the valve chamber 3 increases due to the discharge of the low-temperature fluid, the expansion medium 16 expands. The diaphragm 15 is displaced in the valve closing direction against the fluid pressure on the inlet 4 side by the pressure increase of the internal space 14 and the elastic force of the disc spring 21, and the valve member 18 is seated on the valve seat member 8 and the outlet path 7. Is closed. This prevents vapor leakage. Since the elastic force of the disc spring 21 is applied as the valve closing force, the outlet path 7 can be reliably closed.

【００１３】[0013]

【発明の効果】本発明は下記の特有の効果を生じる。上
記のように本発明は、ダイヤフラムを閉弁方向に付勢す
る弾性部材を内部空間に配置することにより、導出路を
確実に閉止できるので、蒸気漏れを生じることがなく、
省エネルギ―となる。The present invention has the following specific effects. As described above, the present invention arranges an elastic member for biasing the diaphragm in the valve closing direction in the internal space, so that the lead-out path can be reliably closed, so that steam leakage does not occur,
It is energy saving.

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

【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。FIG. 1 is a sectional view of a thermally responsive steam trap according to an embodiment 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 導出路 ８ 弁座部材 １０ 温度制御機素 １２ 壁部材 １４ 内部空間 １５ ダイヤフラム １６ 膨脹媒体 １８ 弁部材 ２１ 皿バネ DESCRIPTION OF SYMBOLS 1 Upper casing 2 Lower casing 3 Valve room 4 Inlet 5 Outlet 7 Outlet 8 Valve seat member 10 Temperature control element 12 Wall member 14 Internal space 15 Diaphragm 16 Expansion medium 18 Valve member 21 Disc spring

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 ケ―シングで入口と弁室と出口を形成
し、壁部材とダイヤフラムの外周縁を固着して形成した
内部空間に膨脹媒体を封入すると共にダイヤフラムに弁
部材を連結した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
を駆動して出口の弁室側開口端に形成した導出路を開閉
するものにおいて、ダイヤフラムを閉弁方向に付勢する
弾性部材を内部空間に配置したことを特徴とする熱応動
式スチ―ムトラップ。A temperature control wherein an inlet, a valve chamber, and an outlet are formed by casing, an expansion medium is sealed in an internal space formed by fixing a wall member and an outer peripheral edge of the diaphragm, and a valve member is connected to the diaphragm. An element is disposed in a valve chamber, and a valve member is driven by displacement of the diaphragm due to expansion and contraction of an expansion medium to open and close an outlet path formed at an opening end of a valve chamber at an outlet. A thermally responsive steam trap, wherein a biasing elastic member is disposed in an internal space.