JP2004245336A - Float type steam trap - Google Patents

Float type steam trap Download PDF

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Publication number
JP2004245336A
JP2004245336A JP2003036317A JP2003036317A JP2004245336A JP 2004245336 A JP2004245336 A JP 2004245336A JP 2003036317 A JP2003036317 A JP 2003036317A JP 2003036317 A JP2003036317 A JP 2003036317A JP 2004245336 A JP2004245336 A JP 2004245336A
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JP
Japan
Prior art keywords
steam trap
float
type steam
float type
rear row
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.)
Granted
Application number
JP2003036317A
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Japanese (ja)
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JP4209698B2 (en
Inventor
Yoshiyasu Fujiwara
良康 藤原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TLV Co Ltd
Original Assignee
TLV Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TLV Co Ltd filed Critical TLV Co Ltd
Priority to JP2003036317A priority Critical patent/JP4209698B2/en
Publication of JP2004245336A publication Critical patent/JP2004245336A/en
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Publication of JP4209698B2 publication Critical patent/JP4209698B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a float type steam trap which can surely prevent the re-evaporation from occurring by sufficiently reducing the temperature of a condensate which flows down through a valve port of the float type steam trap in the rear row. <P>SOLUTION: The float type steam trap 1 in the front row and the float type steam trap 2 in the rear row are arranged in series via a T-joint 3. A thermal power generating element 10 is fixed and mounted to the float type steam trap 1 in the front row. One end of a radiating pipe 41 as the heat radiating part is connected to a branching port 32 of the T-joint 3. The other end of the radiating pipe 41 is connected to the inlet 24 of the float type steam trap 2 in the rear row. An electric motor 21 is fixed and mounted to the float type steam trap 2 in the rear row. An air-blowing fan 22 for cooling the radiating pipe 41 is connected to the electric motor 21. The electric motor 21 drives the air-blowing fan 22 with the electromotive force of the thermal power generating element 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、気体と液体の比重差を利用して、弁室内に収容したフロートで直接にあるいは弁部材を駆動して弁口を開閉することにより、蒸気配管系に発生する復水を自動的に排出するフロート式スチームトラップにする。フロート式スチームトラップの基本構成は、弁ケーシングで入口と弁室と出口を形成し、弁室と出口を連通する弁口を弁室下部に形成し、弁室内に収容したフロートで直接にあるいは弁部材を駆動して弁口を開閉するものである。このフロート式スチームトラップにおいては、排出復水が弁口で再蒸発するために弁口を高速に流下し、弁口内壁にエロージョンを生じたり、流体中に溶解している金属イオンが弁口内壁に突き刺さって次第に堆積したりする問題点があった。
【0002】
【従来の技術】
【特許文献1】
特開2002−372190
この問題点を解決するために、従来は特開2002−372190に開示の技術が用いられた。これは、フロート式スチームトラップを複数台直列に配置して、前列のフロート式スチームトラップの出口を後列のフロート式スチームトラップの入口と接続したものである。
【0003】
【発明が解決しようとする課題】
上記従来のものは、前列のフロート式スチームトラップの弁口の圧力が後列のフロート式スチームトラップの内圧とほぼ同圧に保たれて急激な圧力低下を生じないので、前列のフロート式スチームトラップの弁口を流下する復水の再蒸発を低減でき、また、後列のフロート式スチームトラップの弁口には後列のフロート式スチームトラップからの放熱によって温度低下した復水が流下するので、後列のフロート式スチームトラップの弁口を流下する復水の再蒸発を低減できるものである。しかしながら、後列のフロート式スチームトラップからの放熱には限りがあるために、後列のフロート式スチームトラップの弁口を流下する復水の温度低下が不充分で改良の余地を残すものであった。
【0004】
従って、本発明の技術的課題は、後列のフロート式スチームトラップの弁口を流下する復水の温度を充分に低下させて再蒸発を確実に防止できるフロート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、フロート式スチームトラップを複数台直列に配置して、前列のフロート式スチームトラップの出口を後列のフロート式スチームトラップの入口と接続したものにおいて、前列のフロート式スチームトラップの出口と後列のフロート式スチームトラップの入口との間に放熱部を設けたことを特徴とするフロート式スチームトラップにある。
【0006】
【発明の実施の形態】
本発明は、前列のフロート式スチームトラップの出口と後列のフロート式スチームトラップの入口との間に放熱部を設けたものであるので、後列のフロート式スチームトラップの弁口には前列のフロート式スチームトラップの出口と後列のフロート式スチームトラップの入口との間の放熱部及び後列のフロート式スチームトラップからの放熱によって充分に温度低下した復水が流下する。そのため、後列のフロート式スチームトラップの弁口を流下する復水の再蒸発を確実に防止できる。
【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)。前列のフロート式スチームトラップ1と後列のフロート式スチームトラップ2とをT型継手3を介して直列に配列する。前列のフロート式スチームトラップ1は、入口4と出口5を有する本体6に蓋部材7を締結して内部に弁室を形成し、弁室内に収容したフロートで弁室と出口5を連通する弁口を開閉するものである。本体6は、配管接続用の入口フランジ8と出口フランジ9を有する。蓋部材7に熱発電素子10を固定して取り付ける。熱発電素子10は、フロート式スチームトラップ1側の高温と反対側の大気の低温との温度差によって起電力を発生する。
【0008】
T型継手3は、一軸上の流入口30及び流出口31と、流入口30から直角方向の分岐口32とを有し、流入口30と流出口31に配管接続用の入口フランジ33と出口フランジ34を有する。出口フランジ34は出口31を塞ぐフランジで形成する。入口フランジ33を前列のフロート式スチームトラップ1の出口フランジ9に接続する。分岐口32に圧着継手40を介して放熱部としての放熱管41の一端を接続する。放熱管41は、放熱を促進させるために一部をコイル状に形成する。
【0009】
後列のフロート式スチームトラップ2は、出口25を有する本体26に入口24を有する蓋部材27を締結して内部に弁室を形成し、弁室内に収容したフロートで弁室と出口を連通する弁口を開閉するものである。本体26は、配管接続用の入口フランジ28と出口フランジ29を有する。入口フランジ28をT型継手3の出口フランジ34に接続する。入口24に圧着継手42を介して放熱管41の他端を接続する。蓋部材27に電動機21を固定して取り付け、電動機21に放熱管41を冷却する送風ファン22を連結する。電動機21は、熱発電素子10の起電力で送風ファン22を駆動する。
【0010】
次に本実施例のフロート式スチームトラップの作動を説明する。復水と蒸気が前列のフロート式スチームトラップ1の入口4から弁室に流入し、復水が下部に蒸気が上部に分離して溜まる。フロートは液面が上がると浮力が大きくなるので、浮上して弁口を開き、弁室内の復水を弁口から出口5へ排出する。復水の排出によって弁室内の液面が下がると、それと共にフロートが降下して弁口を閉じる。出口5へ排出された復水はT型継手3から放熱管41を通して後列のフロート式スチームトラップ2の入口24から弁室に流入し、復水が下部に蒸気が上部に分離して溜まる。フロートは液面が上がると浮力が大きくなるので、浮上して弁口を開き、弁室内の復水を弁口から出口25へ排出する。復水の排出によって弁室内の液面が下がると、それと共にフロートが降下して弁口を閉じる。
【0011】
前列のフロート式スチームトラップ1の弁口は後列のフロート式スチームトラップ2の内圧とほぼ同圧であり急激な圧力低下を生じないので、前列のフロート式スチームトラップ1の弁口を流下する復水の再蒸発を低減できる。また、後列のフロート式スチームトラップ2の弁口には放熱管41からの放熱と送風ファン22による冷却及び後列のフロート式スチームトラップ2からの放熱によって充分に温度低下した復水が流下するので、後列のフロート式スチームトラップ2の弁口を流下する復水の再蒸発を低減できる。
【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、前列のフロート式スチームトラップの出口と後列のフロート式スチームトラップの入口との間に放熱部を設けることにより、後列のフロート式スチームトラップの弁口を流下する復水の再蒸発を確実に防止でき、弁口内壁のエロージョンや金属イオンの堆積を防止できるという優れた効果を生じる。
【図面の簡単な説明】
【図1】本発明の実施例のフロート式スチームトラップの断面図である。
【符号の説明】
1 前列のフロート式スチームトラップ
2 後列のフロート式スチームトラップ
3 T型継手
4,24 入口
5,25 出口
6,26 本体
7,27 蓋部材
10 熱発電素子
21 電動機
22 送風ファン
41 放熱管
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention utilizes the difference in specific gravity between gas and liquid to automatically condense water generated in a steam piping system by opening or closing a valve port directly or by driving a valve member in a float housed in a valve chamber. Float type steam trap to discharge to The basic structure of a float steam trap is as follows: an inlet, a valve chamber, and an outlet are formed by a valve casing; a valve port communicating the valve chamber with the outlet is formed in a lower portion of the valve chamber; The member is driven to open and close the valve port. In this float type steam trap, the discharged condensate flows down the valve port at a high speed because it re-evaporates at the valve port, causing erosion on the inner wall of the valve port and the metal ions dissolved in the fluid being removed from the inner wall of the valve port. There was a problem that it was pierced and gradually deposited.
[0002]
[Prior art]
[Patent Document 1]
JP-A-2002-372190
In order to solve this problem, a technique disclosed in JP-A-2002-372190 has been used. In this configuration, a plurality of float steam traps are arranged in series, and the outlet of the float steam trap in the front row is connected to the inlet of the float steam trap in the rear row.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional type, the pressure at the valve port of the float steam trap in the front row is maintained at substantially the same pressure as the internal pressure of the float steam trap in the rear row, so that a sudden pressure drop does not occur. The re-evaporation of condensate flowing down the valve port can be reduced, and the condensate whose temperature has dropped due to the heat released from the float steam trap in the rear row flows down to the valve port of the float steam trap in the rear row. It is possible to reduce the re-evaporation of the condensate flowing down the valve port of the steam trap. However, since the heat release from the rear row float type steam trap is limited, the temperature of the condensate flowing down the valve port of the rear row float type steam trap is insufficient, leaving room for improvement.
[0004]
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a float type steam trap which can sufficiently reduce the temperature of condensate flowing down a valve port of a downstream type float type steam trap and reliably prevent re-evaporation.
[0005]
[Means for Solving the Problems]
The technical means of the present invention taken to solve the above technical problem is to arrange a plurality of float steam traps in series, and to set the outlet of the front row float steam trap to the inlet of the rear row float steam trap. Wherein a heat radiating portion is provided between an outlet of the float steam trap in the front row and an inlet of the float steam trap in the rear row.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, since the heat radiating portion is provided between the outlet of the float steam trap in the front row and the inlet of the float steam trap in the rear row, the valve of the float steam trap in the rear row has a float type in the front row. The condensed water whose temperature has been sufficiently lowered by the heat radiation from the heat radiating portion between the outlet of the steam trap and the inlet of the float steam trap in the rear row and the heat from the float steam trap in the rear row flows down. Therefore, re-evaporation of condensed water flowing down the valve port of the float steam trap in the rear row can be reliably prevented.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The float steam trap 1 in the front row and the float steam trap 2 in the rear row are arranged in series via a T-shaped joint 3. A float type steam trap 1 in the front row has a valve member formed by fastening a lid member 7 to a main body 6 having an inlet 4 and an outlet 5 to form a valve chamber inside, and a valve housed in the valve chamber to communicate the valve chamber with the outlet 5. It opens and closes the mouth. The main body 6 has an inlet flange 8 and an outlet flange 9 for pipe connection. The thermoelectric generator 10 is fixedly attached to the lid member 7. The thermoelectric generator 10 generates an electromotive force by a temperature difference between a high temperature on the float steam trap 1 side and a low temperature of the atmosphere on the opposite side.
[0008]
The T-shaped joint 3 has an inflow port 30 and an outflow port 31 on one axis, and a branch port 32 perpendicular to the inflow port 30, and the inflow port 30 and the outflow port 31 have an inlet flange 33 for pipe connection and an outlet. It has a flange 34. The outlet flange 34 is formed by a flange that closes the outlet 31. The inlet flange 33 is connected to the outlet flange 9 of the float steam trap 1 in the front row. One end of a radiator tube 41 as a radiator is connected to the branch port 32 via a crimp joint 40. A part of the heat radiating tube 41 is formed in a coil shape to promote heat radiation.
[0009]
The float steam trap 2 in the rear row is configured such that a valve member is formed by fastening a lid member 27 having an inlet 24 to a main body 26 having an outlet 25 to form a valve chamber therein, and a valve housed in the valve chamber communicates with the valve chamber and the outlet. It opens and closes the mouth. The main body 26 has an inlet flange 28 and an outlet flange 29 for pipe connection. The inlet flange 28 is connected to the outlet flange 34 of the T-shaped joint 3. The other end of the radiator tube 41 is connected to the inlet 24 via a crimp joint 42. The electric motor 21 is fixedly attached to the lid member 27, and a blower fan 22 for cooling the heat radiation pipe 41 is connected to the electric motor 21. The electric motor 21 drives the blower fan 22 by the electromotive force of the thermoelectric generator 10.
[0010]
Next, the operation of the float type steam trap of this embodiment will be described. Condensate and steam flow into the valve chamber from the inlet 4 of the float steam trap 1 in the front row, and the condensate separates at the bottom and the steam separates at the top and accumulates. Since the buoyancy increases when the liquid level rises, the float floats to open the valve port, and condensate in the valve chamber is discharged from the valve port to the outlet 5. When the liquid level in the valve chamber drops due to the discharge of the condensate water, the float descends and the valve port closes. The condensate discharged to the outlet 5 flows from the T-shaped joint 3 through the radiator pipe 41 into the valve chamber from the inlet 24 of the float steam trap 2 in the rear row, and the condensate separates at the lower part and the vapor separates at the upper part and accumulates. Since the buoyancy increases when the liquid level rises, the float rises to open the valve port, and condensate in the valve chamber is discharged from the valve port to the outlet 25. When the liquid level in the valve chamber drops due to the discharge of the condensate water, the float descends and the valve port closes.
[0011]
Since the valve port of the float steam trap 1 in the front row is substantially the same pressure as the internal pressure of the float steam trap 2 in the rear row and does not cause a sudden pressure drop, the condensate flowing down the valve port of the float steam trap 1 in the front row Can be reduced. Further, the condensed water whose temperature has been sufficiently lowered by the heat radiation from the radiator tube 41, the cooling by the blower fan 22, and the heat radiation from the rear row float steam trap 2 flow down to the valve opening of the rear row float steam trap 2. Re-evaporation of condensed water flowing down the valve port of the float steam trap 2 in the rear row can be reduced.
[0012]
【The invention's effect】
The present invention has the following specific effects.
As described above, according to the present invention, by providing the heat radiating portion between the outlet of the float steam trap in the front row and the inlet of the float steam trap in the rear row, the valve of the float steam trap in the rear row flows down. The re-evaporation of the condensed water can be reliably prevented, and an excellent effect of preventing erosion of the inner wall of the valve opening and accumulation of metal ions can be obtained.
[Brief description of the drawings]
FIG. 1 is a sectional view of a float type steam trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front row float type steam trap 2 Back row float type steam trap 3 T-shaped joint 4, 24 Inlet 5, 25 Outlet 6, 26 Main body 7, 27 Lid member 10 Thermoelectric generator 21 Motor 22 Blower fan 41 Radiation pipe

Claims (1)

フロート式スチームトラップを複数台直列に配置して、前列のフロート式スチームトラップの出口を後列のフロート式スチームトラップの入口と接続したものにおいて、前列のフロート式スチームトラップの出口と後列のフロート式スチームトラップの入口との間に放熱部を設けたことを特徴とするフロート式スチームトラップ。A plurality of float-type steam traps are arranged in series, and the outlet of the float-type steam trap in the front row is connected to the inlet of the float-type steam trap in the rear row. A float type steam trap, wherein a heat radiating part is provided between the trap and an inlet of the trap.
JP2003036317A 2003-02-14 2003-02-14 Float type steam trap Expired - Fee Related JP4209698B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003036317A JP4209698B2 (en) 2003-02-14 2003-02-14 Float type steam trap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003036317A JP4209698B2 (en) 2003-02-14 2003-02-14 Float type steam trap

Publications (2)

Publication Number Publication Date
JP2004245336A true JP2004245336A (en) 2004-09-02
JP4209698B2 JP4209698B2 (en) 2009-01-14

Family

ID=33021430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003036317A Expired - Fee Related JP4209698B2 (en) 2003-02-14 2003-02-14 Float type steam trap

Country Status (1)

Country Link
JP (1) JP4209698B2 (en)

Also Published As

Publication number Publication date
JP4209698B2 (en) 2009-01-14

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