JP3641057B2 - Float type steam trap - Google Patents

Float type steam trap Download PDF

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Publication number
JP3641057B2
JP3641057B2 JP05374696A JP5374696A JP3641057B2 JP 3641057 B2 JP3641057 B2 JP 3641057B2 JP 05374696 A JP05374696 A JP 05374696A JP 5374696 A JP5374696 A JP 5374696A JP 3641057 B2 JP3641057 B2 JP 3641057B2
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Japan
Prior art keywords
valve
float
valve port
port
steam trap
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Expired - Fee Related
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JP05374696A
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Japanese (ja)
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JPH09222196A (en
Inventor
窪　　英範
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Tlv Co Ltd
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Tlv Co Ltd
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Priority to JP05374696A priority Critical patent/JP3641057B2/en
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Description

【０００１】
【発明の属する技術分野】
本発明は、フロ―トの浮上降下を利用して弁口を開閉し、蒸気使用機器や蒸気輸送管に発生する復水を自動的に排出するフロ―ト式スチ―ムトラップに関し、特にこの様式のトラップに備えられる排気機構の改良に関する。
フロ―ト式スチ―ムトラップは、弁室下部に形成された弁口を液面に浮かぶフロ―トで開閉するものであり、弁室内に空気が溜るとフロ―トが浮上できなくなって復水排出機能を喪失してしまい、蒸気使用機器の運転効率を低下させたり、不良品を発生させたり、またウォ―タ・ハンマを誘発して機器や輸送管を破損させる問題がある。そのため、この様式のトラップには空気を排出するための排気機構が備えられている。
【０００２】
【従来の技術】
排気機構を備えたフロ―ト式スチ―ムトラップの基本的構成は、例えば実公昭４８−８７４２号公報から公知である。当該公報から理解されるように、弁ケ―シングで入口と弁室と出口を形成し、弁室を出口に連通する弁口を弁室下部に形成し、弁口を開閉するフロ―トを弁室内に配置し、低温時にフロ―トを開弁方向に付勢して弁口を開口させる温度応動部材を弁室内に配置したものである。
【０００３】
【発明が解決しようとする課題】
上記従来のものでは、変形力の大きな温度応動部材を用いなければならない問題点があった。これは、弁室内に溜った空気を排出する場合には、弁口前後の圧力差及び弁口面積に比例して閉弁しているフロ―トを温度応動部材の変形力で開弁させなければならないためである。
【０００４】
従って、本発明の技術的課題は、変形力の小さな温度応動弁を用いても確実に空気を排出できるフロ―ト式スチ―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為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、弁室を出口に連通する弁口を弁室下部に形成し、弁口を開閉するフロ―トを弁室内に配置したフロ―ト式スチ―ムトラップにおいて、弁口を開閉するフロ―トを弁室内に上下方向に案内して配置し、フロ―トに当該フロ―トを貫通して入口側と弁口を連通し弁口よりも小口径の排気弁口を形成し、低温時に排気弁口を開口し高温時に排気弁口を閉口する温度応動弁をフロ―トに連結したフロ―ト式スチ―ムトラップにある。
【０００６】
【発明の実施の形態】
本発明は、弁口よりも小口径で入口側と弁口を連通する排気弁口をフロ―トを貫通して形成し、この排気弁口をフロ―トに連結した温度応動弁で低温時に開口し高温時に閉口するものである。そのため、温度応動弁は変形力の小さなものであっても排気弁口を確実に開閉することが可能となる。
【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。
本体１に底蓋２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。本体１の上端に入口４を形成し、底蓋２の下端に出口５を形成する。入口４と出口５は上下方向に同一軸上に形成する。弁室３の底部の出口５との隔壁６に弁口７を開けた弁座部材８をねじ結合して取り付ける。弁口７の軸は入口４と出口５の軸上に形成し、流路抵抗が増加しないように、また排出流体が出口５の通路壁に衝突しないように出口５に直結する。
【０００８】
弁口７の上方に弁口７を開閉する円柱形状のフロ―ト９を配置する。フロ―ト９を上下方向に案内するリブ１０を本体１の内周壁に形成する。フロ―ト９の中心に上下に貫通した排気弁口１１を開ける。排気弁口１１は弁口７よりも小口径で、入口４側と弁口７を連通する。排気弁口１１の軸は弁口７の軸上に形成し、流路抵抗が増加しないように、また排出流体が出口５の通路壁に衝突しないようにする。
【０００９】
排気弁口１１の上端に、円板状のバイメタル１２と、バイメタル１２の中心に固着した鋼球１３とで形成する温度応動弁１４を配置し、バイメタル１２の外周をスナップリング１５で保持してフロ―ト９に連結する。図１に示す状態は、温度応動弁１４の周囲が低温状態で排気弁口１１を開けている状態を示す。温度応動弁１４は、所望の高温時においてバイメタル１２が反転して鋼球１３で排気弁口１１を閉じるものである。
【００１０】
上記実施例の作動は下記の通りである。
入口４から弁室３内に復水が流入してくると、フロ―ト９は浮上して弁座部材８から離座して弁口７を開ける。これにより、復水は出口５へ排出される。復水の排出によって弁室３内の液面が低下すると、フロ―ト９は降下して弁座部材８に着座して弁口７を閉じる。これにより、蒸気の漏出が防止される。
【００１１】
そして、弁室３内に空気が溜って弁室３内の温度が低下すると、温度応動弁１４は、バイメタル１２が図１に示すように上に凸状になり、鋼球１３が排気弁口１１を開ける。これにより、空気は出口５へ排出される。空気の排出によって、弁室３内に復水あるいは蒸気が流入してきて弁室３内の温度が上昇すると、温度応動弁１４は、バイメタル１２が下に凸状に反転し、鋼球１３が排気弁口１１を閉じる。
【００１２】
【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、変形力の小さな温度応動弁を用いても確実に空気を排出できるフロ―ト式スチ―ムトラップを提供することができる。
【図面の簡単な説明】
【図１】本発明によるフロ―ト式スチ―ムトラップの断面図である。
【符号の説明】
１ 本体
２ 底蓋
３ 弁室
４ 入口
５ 出口
７ 弁口
８ 弁座部材
９ フロ―ト
１１ 排気弁口
１２ バイメタル
１３ 鋼球
１４ 温度応動弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a float-type steam trap, which opens and closes a valve opening by using the float rise and fall of a float and automatically discharges condensate generated in steam-using equipment and steam transport pipes. It is related with the improvement of the exhaust mechanism with which the trap of this is equipped.
The float type steam trap opens and closes the valve port formed at the bottom of the valve chamber with a float that floats on the liquid surface. If air accumulates in the valve chamber, the float cannot rise and condensate. There is a problem that the exhaust function is lost, the operation efficiency of the steam-using equipment is lowered, defective products are generated, and the equipment and transport pipe are damaged by causing water hammer. Therefore, this type of trap is provided with an exhaust mechanism for exhausting air.
[0002]
[Prior art]
The basic structure of a float type steam trap provided with an exhaust mechanism is known from Japanese Utility Model Publication No. 48-8742, for example. As understood from the publication, the valve casing forms an inlet, a valve chamber, and an outlet, a valve port that communicates the valve chamber with the outlet is formed in the lower portion of the valve chamber, and a float that opens and closes the valve port is provided. A temperature responsive member that is disposed in the valve chamber and urges the float in the valve opening direction to open the valve port at a low temperature is disposed in the valve chamber.
[0003]
[Problems to be solved by the invention]
The above-described conventional apparatus has a problem that a temperature-responsive member having a large deformation force must be used. This is because when the air accumulated in the valve chamber is discharged, the float that is closed in proportion to the pressure difference across the valve port and the valve port area must be opened by the deformation force of the temperature-responsive member. This is because it must be done.
[0004]
Therefore, the technical problem of the present invention is to provide a float type steam trap that can reliably discharge air even if a temperature responsive valve having a small deformation force is used.
[0005]
[Means for Solving the Problems]
The technical means of the present invention devised to solve the above technical problem is to form an inlet, a valve chamber and an outlet by valve casing, and to form a valve port communicating with the outlet at the lower part of the valve chamber. In a float-type steam trap with a float opening / closing valve located in the valve chamber, the float opening / closing flow guide is arranged vertically in the valve chamber. A temperature-responsive valve that penetrates the float and connects the inlet side and the valve port, forms an exhaust valve port that is smaller in diameter than the valve port, opens the exhaust valve port at low temperatures, and closes the exhaust valve port at high temperatures. Located in a float-type steam trap connected to the float.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, an exhaust valve port that is smaller in diameter than the valve port and communicates the inlet side and the valve port is formed through the float, and this exhaust valve port is connected to the float at a low temperature at a low temperature. It opens and closes at high temperatures. Therefore, even if the temperature responsive valve has a small deformation force, the exhaust valve port can be reliably opened and closed.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described.
A bottom lid 2 is screwed to the main body 1 to form a valve casing having a valve chamber 3 therein. An inlet 4 is formed at the upper end of the main body 1, and an outlet 5 is formed at the lower end of the bottom lid 2. The inlet 4 and the outlet 5 are formed on the same axis in the vertical direction. A valve seat member 8 having a valve opening 7 is screwed and attached to a partition wall 6 with an outlet 5 at the bottom of the valve chamber 3. The shaft of the valve port 7 is formed on the shafts of the inlet 4 and the outlet 5 and is directly connected to the outlet 5 so that the flow resistance does not increase and the discharged fluid does not collide with the passage wall of the outlet 5.
[0008]
A cylindrical float 9 that opens and closes the valve port 7 is disposed above the valve port 7. Ribs 10 for guiding the float 9 in the vertical direction are formed on the inner peripheral wall of the main body 1. An exhaust valve port 11 penetrating vertically is opened at the center of the float 9. The exhaust valve port 11 has a smaller diameter than the valve port 7 and communicates the inlet 4 side with the valve port 7. The shaft of the exhaust valve port 11 is formed on the shaft of the valve port 7 so that the flow resistance does not increase and the discharged fluid does not collide with the passage wall of the outlet 5.
[0009]
A temperature responsive valve 14 formed by a disc-shaped bimetal 12 and a steel ball 13 fixed to the center of the bimetal 12 is disposed at the upper end of the exhaust valve port 11, and the outer periphery of the bimetal 12 is held by a snap ring 15. Connect to Float 9. The state shown in FIG. 1 shows a state in which the exhaust valve port 11 is opened at a low temperature around the temperature responsive valve 14. The temperature responsive valve 14 is one in which the bimetal 12 is inverted at a desired high temperature and the exhaust valve port 11 is closed by a steel ball 13.
[0010]
The operation of the above embodiment is as follows.
When the condensate flows into the valve chamber 3 from the inlet 4, the float 9 rises and leaves the valve seat member 8 to open the valve port 7. Thereby, the condensate is discharged to the outlet 5. When the liquid level in the valve chamber 3 decreases due to the discharge of condensate, the float 9 descends and sits on the valve seat member 8 to close the valve port 7. This prevents steam leakage.
[0011]
When air accumulates in the valve chamber 3 and the temperature in the valve chamber 3 decreases, the temperature-responsive valve 14 has the bimetal 12 projecting upward as shown in FIG. 11 is opened. Thereby, the air is discharged to the outlet 5. When condensate or steam flows into the valve chamber 3 due to the discharge of air and the temperature in the valve chamber 3 rises, the temperature-responsive valve 14 is inverted so that the bimetal 12 protrudes downward, and the steel ball 13 is exhausted. The valve port 11 is closed.
[0012]
【The invention's effect】
The present invention produces the following specific effects.
As described above, according to the present invention, it is possible to provide a float-type steam trap that can reliably discharge air even if a temperature responsive valve having a small deformation force is used.
[Brief description of the drawings]
FIG. 1 is a sectional view of a float type steam trap according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Bottom cover 3 Valve chamber 4 Inlet 5 Outlet 7 Valve port 8 Valve seat member 9 Float 11 Exhaust valve port 12 Bimetal 13 Steel ball 14 Temperature-responsive valve

Claims (1)

弁ケ―シングで入口と弁室と出口を形成し、弁室を出口に連通する弁口を弁室下部に形成し、弁口を開閉するフロ―トを弁室内に配置したフロ―ト式スチ―ムトラップにおいて、弁口を開閉するフロ―トを弁室内に上下方向に案内して配置し、フロ―トに当該フロ―トを貫通して入口側と弁口を連通し弁口よりも小口径の排気弁口を形成し、低温時に排気弁口を開口し高温時に排気弁口を閉口する温度応動弁をフロ―トに連結したことを特徴とするフロ―ト式スチ―ムトラップ。A valve type that forms an inlet, a valve chamber, and an outlet by valve casing, a valve port that communicates the valve chamber with the outlet is formed in the lower part of the valve chamber, and a float that opens and closes the valve port is located in the valve chamber In the steam trap, a float that opens and closes the valve port is arranged in the valve chamber so as to be guided in the vertical direction. The float penetrates the float and communicates with the inlet side and the valve port. A float-type steam trap, which has a small-diameter exhaust valve port and is connected to a float with a temperature-responsive valve that opens the exhaust valve port at low temperatures and closes the exhaust valve port at high temperatures.
JP05374696A 1996-02-15 1996-02-15 Float type steam trap Expired - Fee Related JP3641057B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05374696A JP3641057B2 (en) 1996-02-15 1996-02-15 Float type steam trap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05374696A JP3641057B2 (en) 1996-02-15 1996-02-15 Float type steam trap

Publications (2)

Publication Number Publication Date
JPH09222196A JPH09222196A (en) 1997-08-26
JP3641057B2 true JP3641057B2 (en) 2005-04-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP05374696A Expired - Fee Related JP3641057B2 (en) 1996-02-15 1996-02-15 Float type steam trap

Country Status (1)

Country Link
JP (1) JP3641057B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936576A (en) * 2010-08-13 2011-01-05 李乃生 Steam-heating self-controlled water drainage device

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JPH09222196A (en) 1997-08-26

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