JP2011064230A - Pilot type steam trap - Google Patents

Pilot type steam trap Download PDF

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Publication number
JP2011064230A
JP2011064230A JP2009213748A JP2009213748A JP2011064230A JP 2011064230 A JP2011064230 A JP 2011064230A JP 2009213748 A JP2009213748 A JP 2009213748A JP 2009213748 A JP2009213748 A JP 2009213748A JP 2011064230 A JP2011064230 A JP 2011064230A
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Prior art keywords
orifice
piston
valve
pressure chamber
inlet
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JP2009213748A
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Japanese (ja)
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Satoyuki Fujita
智行 藤田
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TLV Co Ltd
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TLV Co Ltd
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Priority to JP2009213748A priority Critical patent/JP2011064230A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To automatically remove foreign matter adhered to an orifice. <P>SOLUTION: The trap includes: a trap casing formed of a body 1 having an inlet 4 and an outlet 6 and a lid 2; a valve port 14 formed between the inlet 4 and the outlet 6; a valve element 17 disposed on the inlet side of the valve port 14 to open and close the valve port 14; a piston 16 disposed on the outlet side of the valve port 14 to drive the valve element 17; a pressure chamber 10 formed on a surface opposite to the valve port 14 of the piston 16; a first orifice 11 which allows the pressure chamber 10 to communicate with the inlet side; a second orifice 20 provided in the piston 16 to allow the pressure chamber 10 to communicate with the outlet side; a pilot valve 9 which opens and closes the first orifice 11 to control the pressure within the pressure chamber 10 to thereby operate the piston 16; and a foreign matter removing member 21 which is provided on the lid 2 and protrudes into the second orifice 20 by displacement of the piston 16 to remove the foreign matter adhered to the second orifice 20. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、蒸気配管系に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、特にパイロット弁の開閉によってピストンを動作させるようにしたパイロット式スチームトラップに関する。 The present invention relates to a steam trap that automatically discharges condensate generated in a steam piping system, and more particularly to a pilot-type steam trap in which a piston is operated by opening and closing a pilot valve.

従来のパイロット式スチームトラップは、例えば特許文献１に開示されている。これは、入口と出口が形成されたトラップケーシングと、入口と出口の間に形成された弁口と、弁口の入口側に配され弁口を開閉する弁体と、弁口の出口側に配され弁体を駆動するピストンと、ピストンの弁口とは反対側の一面に形成された圧力室と、圧力室を入口側に連通する第１オリフィスと、圧力室を出口側に連通するためにピストンに設けられた第２オリフィスと、第１オリフィスを開閉し圧力室内の圧力を制御してピストンを動作させるパイロット弁とを備えたものである。 A conventional pilot-type steam trap is disclosed in, for example, Patent Document 1. This includes a trap casing formed with an inlet and an outlet, a valve port formed between the inlet and the outlet, a valve body arranged on the inlet side of the valve port to open and close the valve port, and an outlet side of the valve port. A piston for driving the valve body, a pressure chamber formed on one surface opposite to the valve port of the piston, a first orifice for communicating the pressure chamber to the inlet side, and for communicating the pressure chamber to the outlet side And a pilot valve for operating the piston by opening and closing the first orifice and controlling the pressure in the pressure chamber.

特公平６−６３５９９号公報Japanese Examined Patent Publication No. 6-63599

上記従来のパイロット式スチームトラップにおいては、第２オリフィスの開口面積が比較的小さいために、第２オリフィスを流下するドレン中のゴミ、錆、スケール等の異物が第２オリフィスに付着し易く次第に堆積して比較的短期間に第２オリフィスが詰まってしまう問題点があった。 In the conventional pilot type steam trap, since the opening area of the second orifice is relatively small, foreign matters such as dust, rust, and scale in the drain flowing down the second orifice are likely to adhere to the second orifice and gradually accumulate. As a result, the second orifice is clogged in a relatively short time.

したがって本発明が解決しようとする課題は、第２オリフィスに付着する異物を自動的に排除できるパイロット式スチームトラップを提供することである。 Therefore, the problem to be solved by the present invention is to provide a pilot-type steam trap that can automatically remove foreign substances adhering to the second orifice.

上記の課題を解決するために、本発明のパイロット式スチームトラップは、入口と出口が形成されたトラップケーシングと、入口と出口の間に形成された弁口と、弁口の入口側に配され弁口を開閉する弁体と、弁口の出口側に配され弁体を駆動するピストンと、ピストンの弁口とは反対側の一面に形成された圧力室と、圧力室を入口側に連通する第１オリフィスと、圧力室を出口側に連通するためにピストンに設けられた第２オリフィスと、第１オリフィスを開閉し圧力室内の圧力を制御してピストンを動作させるパイロット弁とを備えたものにおいて、ピストンの変位により第２オリフィス内に進入して第２オリフィスに付着した異物を排除する異物排除部材をケーシングに設けたことを特徴とするものである。 In order to solve the above problems, a pilot steam trap of the present invention is disposed on a trap casing having an inlet and an outlet, a valve port formed between the inlet and the outlet, and an inlet side of the valve port. A valve body that opens and closes the valve port, a piston that is arranged on the outlet side of the valve port and drives the valve body, a pressure chamber formed on one surface opposite to the valve port of the piston, and the pressure chamber communicated with the inlet side A first orifice, a second orifice provided in the piston for communicating the pressure chamber to the outlet side, and a pilot valve for opening and closing the first orifice and controlling the pressure in the pressure chamber to operate the piston. According to the present invention, the casing is provided with a foreign substance removing member that enters the second orifice due to the displacement of the piston and removes the foreign substance attached to the second orifice.

本発明によれば、ピストンの変位により第２オリフィス内に進入して第２オリフィスに付着した異物を排除する異物排除部材をケーシングに設けたものであるので、ピストンの変位により異物排除部材が第２オリフィス内に進入して第２オリフィスに付着する異物を自動的に排除できるという効果を奏する。 According to the present invention, the foreign matter removing member that enters the second orifice due to the displacement of the piston and removes the foreign matter adhering to the second orifice is provided in the casing. There is an effect that foreign matters that enter the two orifices and adhere to the second orifice can be automatically excluded.

本発明の実施の形態に係わるパイロット式スチームトラップの断面図である。It is sectional drawing of the pilot type steam trap concerning embodiment of this invention.

以下、本発明の実施の形態について、図１を参照して説明する。本体１と本体１に固着された蓋２によりトラップケーシングが形成される。本体１に入口４と出口６が形成される。入口４と出口６は同一軸上に形成される。トラップケーシングの内部は仕切り壁３により入口４の連通する入口側空間５と出口６の連通する出口側空間７に仕切られる。入口側空間５の下部に異物捕捉用のスクリーン８が配置される。入口側空間５の上部にパイロット弁９が取付けられる。パイロット弁９は具体的な構造の図示を省略しているが、入口側空間５の温度に従って膨脹収縮する膨脹媒体によりダイヤフラムを変位せしめ、ダイヤフラムに連結した弁部材により下記の圧力室１０に連通する第１オリフィス１１を開閉するようにしたものである。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. A trap casing is formed by the main body 1 and the lid 2 fixed to the main body 1. An inlet 4 and an outlet 6 are formed in the main body 1. The inlet 4 and the outlet 6 are formed on the same axis. The inside of the trap casing is partitioned by a partition wall 3 into an inlet side space 5 that communicates with the inlet 4 and an outlet side space 7 that communicates with the outlet 6. A foreign matter capturing screen 8 is disposed below the entrance side space 5. A pilot valve 9 is attached to the upper part of the inlet side space 5. Although a specific illustration of the pilot valve 9 is omitted, the diaphragm is displaced by an expansion medium that expands and contracts in accordance with the temperature of the inlet side space 5, and communicates with the pressure chamber 10 described below by a valve member connected to the diaphragm. The first orifice 11 is opened and closed.

出口側空間７にシリンダ１２が配置される。入口側空間５と出口側空間７の間に弁座１３が配置される。入口側空間５と出口側空間７は弁座１３に開けられた弁口１４により連通される。シリンダ１２内に気密的に摺動するピストン１６が配置され、弁口１４の下方の入口側空間５側に弁口１４を開閉する弁体１７が配置される。弁体１７は弁棒部１８が弁座１３を貫通し、更にピストン１６を貫通して、ナット１９によりピストン１６に固定され、ピストン１６により駆動される。ピストン１６の弁口１４とは反対側の一面に形成された上方空間が圧力室１０を成し、第１オリフィス１１によって入口側空間５に連通している。また圧力室１０はピストン１６に設けられた第２オリフィス２０により出口側空間７に連通している。 A cylinder 12 is disposed in the outlet side space 7. A valve seat 13 is disposed between the inlet side space 5 and the outlet side space 7. The inlet side space 5 and the outlet side space 7 are communicated with each other by a valve port 14 opened in the valve seat 13. A piston 16 that slides in an airtight manner is disposed in the cylinder 12, and a valve body 17 that opens and closes the valve port 14 is disposed on the side of the inlet side space 5 below the valve port 14. The valve body 17 is driven by the piston 16 with the valve rod portion 18 passing through the valve seat 13 and further passing through the piston 16 and being fixed to the piston 16 by the nut 19. An upper space formed on one surface of the piston 16 opposite to the valve port 14 forms a pressure chamber 10 and communicates with the inlet-side space 5 through the first orifice 11. The pressure chamber 10 communicates with the outlet side space 7 through a second orifice 20 provided in the piston 16.

蓋２に異物排除部材２１をねじ結合して設ける。異物排除部材２１はピストン１６が上方に閉弁方向に変位したときに第２オリフィス２０内に進入して第２オリフィス２０に付着した異物を排除する。 A foreign substance exclusion member 21 is screwed to the lid 2 and provided. The foreign matter removing member 21 enters the second orifice 20 when the piston 16 is displaced upward in the valve closing direction, and removes the foreign matter attached to the second orifice 20.

上記実施例の作動は下記の通りである。始動時は入口側空間５が低温であり、パイロット弁９の開弁により第１オリフィス１１から圧力室１０に導入される低温流体により圧力室１０の圧力が高められ、ピストン１６が下方に変位し、これに伴って弁体１７が弁座１３から離座して弁口１４を開き、入口４からの復水を出口６へ排出する。復水の排出により入口側空間５が高温になると、パイロット弁９が第１オリフィス１１を閉弁し、圧力室１０の圧力が第２オリフィス２０を通して次第に低下するので、ピストン１６が上方に変位し、これに伴って弁体１７が弁座１３に着座して弁口１４を塞ぐ。このとき、異物排除部材２１が第２オリフィス２０内に侵入して第２オリフィス２０に付着した異物を排除する。 The operation of the above embodiment is as follows. At the time of starting, the inlet side space 5 is at a low temperature, and the pressure of the pressure chamber 10 is increased by the low temperature fluid introduced from the first orifice 11 into the pressure chamber 10 by opening the pilot valve 9, and the piston 16 is displaced downward. Accordingly, the valve body 17 is separated from the valve seat 13 to open the valve port 14, and the condensate from the inlet 4 is discharged to the outlet 6. When the inlet-side space 5 becomes hot due to the discharge of condensate, the pilot valve 9 closes the first orifice 11 and the pressure in the pressure chamber 10 gradually decreases through the second orifice 20, so that the piston 16 is displaced upward. Accordingly, the valve element 17 is seated on the valve seat 13 and closes the valve opening 14. At this time, the foreign matter removing member 21 enters the second orifice 20 and removes the foreign matter attached to the second orifice 20.

本発明は、パイロット弁の開閉によってピストンを動作させることにより、蒸気配管系に発生する復水を自動的に排出するパイロット式スチームトラップに利用することができる。 The present invention can be used for a pilot-type steam trap that automatically discharges condensate generated in a steam piping system by operating a piston by opening and closing a pilot valve.

１ 本体
２ 蓋
４ 入口
５ 入口側空間
６ 出口
７ 出口側空間
９ パイロット弁
１０ 圧力室
１１ 第１オリフィス
１３ 弁座
１４ 弁口
１６ ピストン
１７ 弁体
２０ 第２オリフィス
２１ 異物排除部材 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Inlet 5 Inlet side space 6 Outlet 7 Outlet side space 9 Pilot valve 10 Pressure chamber 11 First orifice 13 Valve seat 14 Valve port 16 Piston 17 Valve body 20 Second orifice 21 Foreign matter exclusion member

Claims (1)

入口と出口が形成されたトラップケーシングと、入口と出口の間に形成された弁口と、弁口の入口側に配され弁口を開閉する弁体と、弁口の出口側に配され弁体を駆動するピストンと、ピストンの弁口とは反対側の一面に形成された圧力室と、圧力室を入口側に連通する第１オリフィスと、圧力室を出口側に連通するためにピストンに設けられた第２オリフィスと、第１オリフィスを開閉し圧力室内の圧力を制御してピストンを動作させるパイロット弁とを備えたものにおいて、ピストンの変位により第２オリフィス内に進入して第２オリフィスに付着した異物を排除する異物排除部材をケーシングに設けたことを特徴とするパイロット式スチームトラップ。 A trap casing formed with an inlet and an outlet, a valve port formed between the inlet and the outlet, a valve body arranged on the inlet side of the valve port to open and close the valve port, and a valve arranged on the outlet side of the valve port A piston for driving the body, a pressure chamber formed on one surface opposite to the valve opening of the piston, a first orifice for communicating the pressure chamber to the inlet side, and a piston for communicating the pressure chamber to the outlet side. The second orifice provided and a pilot valve that opens and closes the first orifice and controls the pressure in the pressure chamber to operate the piston, and enters the second orifice due to the displacement of the piston to enter the second orifice. A pilot-type steam trap, characterized in that a foreign matter removing member for removing foreign matter adhering to the casing is provided in the casing.
JP2009213748A 2009-09-15 2009-09-15 Pilot type steam trap Pending JP2011064230A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013002552A (en) * 2011-06-16 2013-01-07 Tlv Co Ltd Pressure reducing valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0663599B2 (en) * 1989-05-15 1994-08-22 株式会社テイエルブイ Pilot steam trap
JPH06265094A (en) * 1993-03-15 1994-09-20 Tlv Co Ltd Pilot type steam trap
JP2000240123A (en) * 1999-02-25 2000-09-05 Toto Ltd Flush valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0663599B2 (en) * 1989-05-15 1994-08-22 株式会社テイエルブイ Pilot steam trap
JPH06265094A (en) * 1993-03-15 1994-09-20 Tlv Co Ltd Pilot type steam trap
JP2000240123A (en) * 1999-02-25 2000-09-05 Toto Ltd Flush valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013002552A (en) * 2011-06-16 2013-01-07 Tlv Co Ltd Pressure reducing valve

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