JP4515613B2

JP4515613B2 - Thermally responsive steam trap

Info

Publication number: JP4515613B2
Application number: JP2000279509A
Authority: JP
Inventors: 正小池
Original assignee: Tlv Co Ltd
Current assignee: Tlv Co Ltd
Priority date: 2000-09-14
Filing date: 2000-09-14
Publication date: 2010-08-04
Anticipated expiration: 2020-09-14
Also published as: JP2002089785A

Description

【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ームトラップに関し、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ームトラップに関するものである。
【０００２】
【従来の技術】
温度制御機素を用いた熱応動式スチームトラップは、例えば特許第２８７９５２５号に示されている。当該公報から理解されるように、入口と出口を形成した本体に蓋部材を取付けて内部に入口と出口が開口する弁室を形成し、壁部材とダイヤフラム部材と両部材の間に収容した膨張媒体とから成る温度制御機素を弁室内の所定位置に保持し、膨張媒体の膨張収縮によるダイヤフラム部材の変位によって出口の弁室側開口端を開閉するものにおいて、蓋部材と温度制御機素の間に弾性部材を配置して、弾性部材の付勢力によって温度制御機素を弁室内の所定位置に保持するものである。膨脹媒体は、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。
【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ダイヤフラム部材が入口側の流体圧力に抗して閉弁方向に変位して出口の弁室側開口端を閉止する。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。
【０００４】
上記従来技術のものでは、スチームトラップが設置された蓋の上方空間が狭い場合、温度制御機素を点検や交換のために本体から取出し難く、温度制御機素の点検交換に時間が掛かる問題があった。従って、本発明の技術的課題は、温度制御機素を本体から簡単に取出せる熱応動式スチームトラップを提供することである。
【０００５】
【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、入口と出口を形成した本体に蓋部材を取付けて内部に入口と出口が開口する弁室を形成し、注入口を有する上壁部材と注入口を密封する栓部材と上壁部材との間に収容室を形成するダイヤフラム部材と収容室に密封される膨張媒体とから成る温度制御機素を弁室内の所定位置に保持し、膨張媒体の膨張収縮によるダイヤフラム部材の変位によって出口の弁室側開口端を開閉するものにおいて、一端を蓋部材に固定し他端を温度制御機素に固定した弾性部材としてのコイルスプリングの付勢力によって温度制御機素を弁室内の所定位置に保持し、コイルスプリングは一端のコイル径が蓋部材の内径よりも大きく形成され、一端を蓋部材の内壁に嵌め込むことにより固定され、他端のコイル径が栓部材の直径よりも小さく形成され、他端を栓部材に嵌め込むことにより固定されることを特徴とする熱応動式スチームトラップにある。
【０００６】
【発明の実施の形態】
本発明の熱応動式スチームトラップは、一端を蓋部材に固定し他端を温度制御機素に固定した弾性部材の付勢力によって温度制御機素を弁室内の所定位置に保持するものであるので、蓋部材を本体から取外すことにより、蓋部材と一体に弾性部材と温度制御機素を本体から取出すことができる。
【０００７】
【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にねじ結合された蓋部材５によって形成される。出口３の弁室４側開口端に、弁室４と出口３とを連通する弁孔６が形成された弁座部材７がねじ結合されている。
【０００８】
弁座部材７の上方に、温度制御機素８が配置される。温度制御機素８は、注入口９を有する上壁部材１０と、注入口９を密封する栓部材１１と、上壁部材１０との間に収容室１２を形成するダイヤフラム部材１３と、収容室１２に密封される膨脹媒体１４と、ダイヤフラム部材１３に固着され弁座部材７に離着座して弁孔６を開閉する弁部材１５と、ダイヤフラム部材１３の外周縁を上壁部材１０との間に挟んで固着する下壁部材１６と、から形成される。膨脹媒体１４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。
【０００９】
温度制御機素８は、本体１と弁座部材７との間に挟んで固定された有底円筒形状の取付部材１７内に収容され、一端を蓋部材５に固定し他端を温度制御機素８に固定した弾性部材としてのコイルスプリング１８の付勢力によって取付部材１７の段部１９に下壁部材１６の外周下面が当接保持される。コイルスプリング１８は一端のコイル径が蓋部材５の内径よりも大きく形成され、一端を蓋部材５の内壁に嵌め込むことにより固定され、他端のコイル径が栓部材１１の直径よりも小さく形成され、他端を栓部材１１に嵌め込むことにより固定される。取付部材１７には、底壁に流体通過孔２０と周壁に３つの流体通過窓２１が開けられている。
【００１０】
本実施例での作動は下記の通りである。
始動時、弁室４内は低温であり、膨脹媒体１４は収縮し、ダイヤフラム部材１３が上方に変位し、弁部材１５が弁座部材７から離座して弁孔６を開口している。これによって入口２から流入する低温の復水や空気を弁孔６から出口３へ排出する。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１４は膨脹し、ダイヤフラム部材１３が下方に変位し、弁部材１５が弁座部材７に着座して弁孔６を閉止する。これによって蒸気の漏出を防止する。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１４は収縮し、ダイヤフラム部材１３が上方に変位し、弁部材１５が弁座部材７から離座して弁孔６を開口する。
【００１１】
温度制御機素８を点検や交換のために本体１から取出す場合は、蓋部材５を本体１から取外すことにより、蓋部材５及びコイルスプリング１８と一体に取出すことができる。
【００１２】
【発明の効果】
上記のように本発明は、一端を蓋部材に固定し他端を温度制御機素に固定した弾性部材の付勢力によって温度制御機素を弁室内の所定位置に保持するものであるので、蓋部材を本体から取外すことにより、蓋部材と一体に弾性部材と温度制御機素を本体から取出すことができ、温度制御機素を本体から簡単に取出せると言う優れた効果を生じる。
【図面の簡単な説明】
【図１】本発明の実施例の熱応動式スチームトラップの断面図。
【符号の説明】
１本体
２入口
３出口
４弁室
５蓋部材
６弁孔
７弁座部材
８温度制御機素
１０上壁部材
１３ダイヤフラム部材
１４膨張媒体
１５弁部材
１６下壁部材
１７取付部材
１８コイルスプリング
１９段部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steam trap that automatically discharges condensate generated in various steam-using devices and steam pipes, and in particular, by using a temperature control element including a medium that is heated, expanded, cooled, and contracted. The present invention relates to a thermally responsive steam trap that discharges a fluid having a temperature below the system.
[0002]
[Prior art]
A thermally responsive steam trap using a temperature control element is disclosed in, for example, Japanese Patent No. 2879525. As can be understood from the publication, a lid member is attached to a main body having an inlet and an outlet to form a valve chamber in which the inlet and the outlet are opened, and the wall member, the diaphragm member, and an expansion housed between the two members. A temperature control element comprising a medium is held at a predetermined position in the valve chamber, and the opening end of the valve chamber side of the outlet is opened and closed by the displacement of the diaphragm member due to expansion and contraction of the expansion medium. An elastic member is disposed therebetween, and the temperature control element is held at a predetermined position in the valve chamber by the urging force of the elastic member. The expansion medium is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.
[0003]
[Problems to be solved by the invention]
When a high-temperature fluid of a predetermined temperature or more flows into the valve chamber, the expansion medium expands and the diaphragm member is displaced in the valve closing direction against the fluid pressure on the inlet side to close the outlet end on the valve chamber side of the outlet. To do. This prevents steam discharge. When a low-temperature fluid having a predetermined temperature or less flows in, the expansion medium contracts and the diaphragm is displaced in the valve opening direction by the fluid pressure on the inlet side to open the lead-out path. This discharges condensate and air out of the system.
[0004]
In the above prior art, when the space above the lid where the steam trap is installed is narrow, it is difficult to take out the temperature control element from the main body for inspection or replacement, and it takes time to inspect and replace the temperature control element. there were. Accordingly, the technical problem of the present invention is to provide a thermally responsive steam trap that allows the temperature control element to be easily removed from the body.
[0005]
[Means for Solving the Problems]
Technical means of the present invention taken in order to solve the technical problems described above, the inlet and outlet to form a valve chamber which opens to the interior by attaching a lid member to the body forming an inlet and an outlet, the inlet A temperature control element comprising a diaphragm member forming an accommodation chamber between the upper wall member having the sealing member and the upper wall member and an expansion medium sealed in the accommodation chamber is placed at a predetermined position in the valve chamber. Coil spring as an elastic member that is held and opens and closes the valve chamber side opening end of the outlet by displacement of the diaphragm member due to expansion and contraction of the expansion medium, with one end fixed to the lid member and the other end fixed to the temperature control element The temperature control element is held at a predetermined position in the valve chamber by the urging force of the coil spring, the coil diameter of the coil spring is formed larger than the inner diameter of the lid member, and is fixed by fitting one end into the inner wall of the lid member. other Coil diameter of is formed smaller than the diameter of the plug member, in the thermally responsive type steam trap, characterized in that it is fixed by fitting the other end to the plug member.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The thermo-responsive steam trap of the present invention holds the temperature control element in a predetermined position in the valve chamber by the biasing force of an elastic member having one end fixed to the lid member and the other end fixed to the temperature control element. By removing the lid member from the main body, the elastic member and the temperature control element can be removed from the main body integrally with the lid member.
[0007]
【Example】
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 formed by a lid member 5 screwed to the main body 1. A valve seat member 7 having a valve hole 6 communicating with the valve chamber 4 and the outlet 3 is screwed to an opening end of the outlet 3 on the valve chamber 4 side.
[0008]
A temperature control element 8 is disposed above the valve seat member 7. The temperature control element 8 includes an upper wall member 10 having an inlet 9, a plug member 11 that seals the inlet 9, a diaphragm member 13 that forms a storage chamber 12 between the upper wall member 10, and a storage chamber 12, an expansion medium 14 that is sealed to the diaphragm 12, a valve member 15 that is fixedly attached to the diaphragm member 13 and opens and closes the valve hole 6, and an outer peripheral edge of the diaphragm member 13 between the upper wall member 10. And a lower wall member 16 fixed between the two. The expansion medium 14 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.
[0009]
The temperature control element 8 is accommodated in a bottomed cylindrical mounting member 17 fixed between the main body 1 and the valve seat member 7, one end is fixed to the lid member 5, and the other end is a temperature controller. The outer peripheral lower surface of the lower wall member 16 is held in contact with the step portion 19 of the mounting member 17 by the urging force of the coil spring 18 as an elastic member fixed to the element 8. The coil spring 18 is formed such that the coil diameter at one end is larger than the inner diameter of the lid member 5, is fixed by fitting one end into the inner wall of the lid member 5, and the coil diameter at the other end is smaller than the diameter of the plug member 11. The other end is fixed by fitting into the plug member 11 . The preparative member with 17, fluid passage hole 20 and the peripheral wall into three flow-through windows 21 are opened in the bottom wall.
[0010]
The operation in this embodiment is as follows.
At the time of starting, the inside of the valve chamber 4 is at a low temperature, the expansion medium 14 is contracted, the diaphragm member 13 is displaced upward, and the valve member 15 is separated from the valve seat member 7 to open the valve hole 6. As a result, low-temperature condensate and air flowing from the inlet 2 are discharged from the valve hole 6 to the outlet 3. When the temperature of the fluid flowing in 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 more, the expansion medium 14 expands, the diaphragm member 13 is displaced downward, and the valve member 15 becomes the valve seat member. 7 is seated and the valve hole 6 is closed. This prevents steam leakage. When the inside of the valve chamber 4 falls below a predetermined temperature due to heat radiation, the expansion medium 14 contracts, the diaphragm member 13 is displaced upward, and the valve member 15 is separated from the valve seat member 7 to open the valve hole 6.
[0011]
When the temperature control element 8 is taken out from the main body 1 for inspection or replacement, it can be taken out integrally with the lid member 5 and the coil spring 18 by removing the lid member 5 from the main body 1.
[0012]
【The invention's effect】
As described above, the present invention holds the temperature control element in a predetermined position in the valve chamber by the biasing force of the elastic member having one end fixed to the lid member and the other end fixed to the temperature control element. By removing the member from the main body, the elastic member and the temperature control element can be taken out from the main body integrally with the lid member, and an excellent effect is obtained that the temperature control element can be easily taken out from the main body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a thermally responsive steam trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Valve chamber 5 Lid member 6 Valve hole 7 Valve seat member 8 Temperature control element 10 Upper wall member 13 Diaphragm member 14 Expansion medium 15 Valve member 16 Lower wall member 17 Mounting member 18 Coil spring 19 Step part

Claims

入口と出口を形成した本体に蓋部材を取付けて内部に入口と出口が開口する弁室を形成し、注入口を有する上壁部材と注入口を密封する栓部材と上壁部材との間に収容室を形成するダイヤフラム部材と収容室に密封される膨脹媒体とから成る温度制御機素を弁室内の所定位置に保持し、膨張媒体の膨張収縮によるダイヤフラム部材の変位によって出口の弁室側開口端を開閉するものにおいて、一端を蓋部材に固定し他端を温度制御機素に固定した弾性部材としてのコイルスプリングの付勢力によって温度制御機素を弁室内の所定位置に保持し、コイルスプリングは一端のコイル径が蓋部材の内径よりも大きく形成され、一端を蓋部材の内壁に嵌め込むことにより固定され、他端のコイル径が栓部材の直径よりも小さく形成され、他端を栓部材に嵌め込むことにより固定されることを特徴とする熱応動式スチームトラップ。A lid member is attached to the main body formed with the inlet and the outlet to form a valve chamber in which the inlet and the outlet are opened. Between the upper wall member having the inlet and the stopper member and the upper wall member for sealing the inlet. A temperature control element composed of a diaphragm member forming the storage chamber and an expansion medium sealed in the storage chamber is held at a predetermined position in the valve chamber, and the valve chamber side opening at the outlet is caused by the displacement of the diaphragm member due to expansion and contraction of the expansion medium. For opening and closing the end, the temperature control element is held at a predetermined position in the valve chamber by the biasing force of the coil spring as an elastic member having one end fixed to the lid member and the other end fixed to the temperature control element. The coil diameter at one end is formed larger than the inner diameter of the lid member, one end is fixed by being fitted into the inner wall of the lid member, the coil diameter at the other end is formed smaller than the diameter of the plug member, and the other end is plugged. Element The thermally responsive type steam trap, characterized in that fixed by fitting.