JP5791915B2 - Pilot steam trap - Google Patents

Pilot steam trap Download PDF

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JP5791915B2
JP5791915B2 JP2011031408A JP2011031408A JP5791915B2 JP 5791915 B2 JP5791915 B2 JP 5791915B2 JP 2011031408 A JP2011031408 A JP 2011031408A JP 2011031408 A JP2011031408 A JP 2011031408A JP 5791915 B2 JP5791915 B2 JP 5791915B2
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outlet
valve
piston
valve port
inlet
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JP2012167796A (en
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哲夫 浅田
哲夫 浅田
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Tlv Co Ltd
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Tlv Co Ltd
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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、弁口とピストンの間の出口側空間と出口とを隔てる隔壁筒を設け、隔壁筒に総開口面積が弁口面積と同等となる連通孔を等間隔に複数個形成したものである。 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 that is arranged and drives the valve body, a pressure chamber formed on one surface opposite to the valve port of the piston, a first orifice that communicates the pressure chamber to the inlet side, and a first chamber that communicates the pressure chamber to the outlet side. A partition cylinder that separates the outlet and the outlet space between the valve port and the piston is provided with two orifices and a pilot valve that opens and closes the first orifice and controls the pressure in the pressure chamber to operate the piston. A plurality of communication holes having a total opening area equal to the valve opening area are formed at equal intervals in the partition tube.

特開２００９−２７５８５０JP 2009-275850 A

上記従来のパイロット式スチームトラップは、弁口とピストンの間の出口側空間と出口とを隔てる隔壁筒を設け、隔壁筒に総開口面積が弁口面積と同等となる連通孔を等間隔に複数個形成することにより、ピストンの傾斜を防止するものであるが、出口に対面する連通孔から流体が優先的に流出するためにピストンの傾斜を完全に防止することができず、改善の余地を残すものであった。 The conventional pilot steam trap is provided with a partition cylinder that separates the outlet side space between the valve port and the piston and the outlet, and the partition cylinder has a plurality of communication holes with a total opening area equal to the valve port area at equal intervals. By forming the individual pieces, the piston is prevented from tilting, but since the fluid preferentially flows out from the communication hole facing the outlet, the piston tilt cannot be completely prevented, and there is room for improvement. It was something to leave.

したがって本発明が解決しようとする課題は、ピストンが傾斜することを防止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 steam trap that can prevent the piston from tilting.

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、弁口とピストンの間の出口側空間と出口とを隔てる隔壁筒を設け、隔壁筒に総開口面積が弁口面積と同等となる連通孔を等間隔に複数個形成したものにおいて、出口と直角方向の両側のみに連通孔を形成し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 And a pilot valve for operating the piston by opening and closing the first orifice and controlling the pressure in the pressure chamber. A partition cylinder that separates the outlet-side space between the outlet and the outlet is provided, and a plurality of communication holes having a total opening area equal to the valve opening area are formed in the partition cylinder at equal intervals. The communication hole is formed in the It is an.

本発明によれば、隔壁筒に形成する複数個の連通孔を出口と直角方向の両側のみに形成したことにより、弁口から出口に向かう排出復水が隔壁筒内でピストンに均等に作用しながら連通孔から出口に排出され、ピストンが傾斜することを防止できるという効果を奏する。 According to the present invention, the plurality of communication holes formed in the partition cylinder are formed only on both sides in the direction perpendicular to the outlet, so that the discharged condensate from the valve port to the outlet acts equally on the piston in the partition cylinder. While being discharged from the communication hole to the outlet, the piston can be prevented from tilting.

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を貫通する第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 that penetrates the piston 16.

弁口１４とピストン１６の間の出口側空間７と出口６とを隔てる隔壁筒２１を設け、隔壁筒２１に総開口面積が弁口面積と同等となる連通孔２２を出口６と直角方向の両側に紙面では手前側と向こう側に形成する。 A partition tube 21 is provided to separate the outlet side space 7 between the valve port 14 and the piston 16 and the outlet 6, and a communication hole 22 having a total opening area equal to the valve port area is provided in the partition tube 21 in a direction perpendicular to the outlet 6. On both sides of the paper, the front side and the other side are formed.

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。弁口１４から出口６に向かう排出復水が隔壁筒２１内でピストン１６に均等に作用しながら連通孔２２から出口６に排出されるので、ピストン１６が傾斜することを防止できる。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、圧力室１０の圧力によりピストン１６を下方に押し下げる力と、出口側空間７の圧力によりピストン１６を上方に押し上げる力は相殺されるが、入口側空間５の圧力により弁体１７を上方に押し上げる力が出口側空間７の圧力により弁体１７を下方に押し下げる力と重力によりピストン１６及び弁体１７を下方に押し下げる力との合力よりも大きいため、ピストン１６及び弁体１７は上方に移動し、弁体１７が弁口１４を塞ぐ。 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. Since the discharged condensate from the valve port 14 toward the outlet 6 is discharged from the communication hole 22 to the outlet 6 while acting equally on the piston 16 in the partition wall cylinder 21, the piston 16 can be prevented from being inclined. When the inlet-side space 5 becomes a high temperature by the discharge of the condensate, the pilot valve 9 closes the first orifice 11, since the pressure in the pressure chamber 10 gradually lowers through the second orifice 20, the piston by the pressure in the pressure chamber 10 The force that pushes the piston 16 downward and the force that pushes the piston 16 upward are offset by the pressure in the outlet side space 7, but the force that pushes the valve body 17 upward by the pressure in the inlet side space 5 is the pressure in the outlet side space 7. Is larger than the combined force of the force that pushes down the valve element 17 by the force and the force that pushes down the piston 16 and the valve element 17 by gravity, so that the piston 16 and the valve element 17 move upward, and the valve element 17 moves to the valve port 14. Block.

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 steam trap that automatically discharges condensate generated in a steam pipe system.

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 隔壁筒
２２ 連通孔 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 Bulkhead cylinder 22 Communication hole

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、弁口とピストンの間の出口側空間と出口とを隔てる隔壁筒を設け、隔壁筒に総開口面積が弁口面積と同等となる連通孔を等間隔に複数個形成したものにおいて、出口と直角方向の両側のみに連通孔を形成し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 communicating the pressure chamber to the inlet side, and a second orifice communicating the pressure chamber to the outlet side , Bei example and a pilot valve for operating the piston to open and close the first orifice to control the pressure in the pressure chamber is provided with a partition wall tube that separates the outlet side space and an outlet between the valve port and the piston, the total in the partition wall tube A pilot-type steam trap, wherein a plurality of communication holes having an opening area equal to the valve port area are formed at equal intervals, and communication holes are formed only on both sides in a direction perpendicular to the outlet.
JP2011031408A 2011-02-16 2011-02-16 Pilot steam trap Active JP5791915B2 (en)

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JP5791915B2 true JP5791915B2 (en) 2015-10-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5839676B2 (en) * 2011-11-17 2016-01-06 株式会社テイエルブイ Pressure reducing valve
KR101891578B1 (en) * 2017-11-24 2018-08-28 주식회사 삼영이엔지 Hybrid steam trap with cone structure

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* Cited by examiner, † Cited by third party
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JP2009275850A (en) * 2008-05-15 2009-11-26 Tlv Co Ltd Pilot type steam trap

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