JPH0637273Y2 - Pilot steam trap - Google Patents

Description

【考案の詳細な説明】 産業上の利用分野 本考案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、圧力応動部材を配置し
た圧力室内の圧力を補助のパイロット弁の開閉作用によ
って制御し、圧力応動部材を駆動して主弁口を開閉する
ようにしたパイロット式スチームトラップに関する。TECHNICAL FIELD The present invention relates to a steam trap for automatically discharging condensate generated in a steam piping system, and more particularly to a pilot valve for assisting the pressure in a pressure chamber in which a pressure responsive member is arranged. The present invention relates to a pilot-type steam trap which is controlled by the opening and closing action of the valve and drives the pressure responsive member to open and close the main valve opening.

従来の技術 このパイロット式スチームトラップは、例えば特開昭55
−112490号公報に示されている。これは、圧力室内に圧
力応動部材を配置し、圧力応動部材で圧力室を第１圧力
室と第２圧力室に気密的に仕切り、補助のパイロット弁
で開閉されるパイロット弁口を第１圧力室に連通せし
め、第２圧力室を出口に連通せしめ、第１圧力室と第２
圧力室を連通する細孔を設け、圧力応動部材に主弁口を
開閉する主弁体を連結したものである。2. Description of the Related Art This pilot type steam trap is disclosed in
-112490 publication. This is because a pressure responsive member is arranged in the pressure chamber, the pressure responsive member divides the pressure chamber into a first pressure chamber and a second pressure chamber in an airtight manner, and an auxiliary pilot valve opens and closes a pilot valve port at a first pressure. The second pressure chamber to the outlet, and the first pressure chamber and the second pressure chamber to communicate with each other.
A fine hole communicating with the pressure chamber is provided, and a main valve body for opening and closing the main valve opening is connected to the pressure responsive member.

本考案が解決しようとする課題 上記のものは、第１圧力室と第２圧力室との差圧によっ
て圧力応動部材が変位し、圧力応動部材に連結した主弁
体が主弁口を開閉する。即ち、補助のパイロット弁の開
閉によって導入される入口側圧力と出口側圧力との差圧
で圧力応動部材が駆動される。従って、出口側の圧力が
高く入口側との差圧が小さい場合には、圧力応動部材の
受圧面積をより大きくして力を拡大しなければ、大きな
主弁口を開けることができない問題があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above, the pressure responsive member is displaced by the differential pressure between the first pressure chamber and the second pressure chamber, and the main valve body connected to the pressure responsive member opens and closes the main valve opening. . That is, the pressure responsive member is driven by the differential pressure between the inlet side pressure and the outlet side pressure introduced by opening and closing the auxiliary pilot valve. Therefore, when the pressure on the outlet side is high and the pressure difference with the inlet side is small, there is a problem that a large main valve port cannot be opened unless the pressure receiving area of the pressure responsive member is increased to increase the force. It was

従って、本考案の技術的課題は、圧力応動部材を大きく
せずに、大きな主弁口を開けることができるようにする
ことである。Therefore, the technical problem of the present invention is to make it possible to open a large main valve opening without increasing the size of the pressure responsive member.

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考案の技術
的手段は、圧力室内に圧力応動部材を配置し、圧力応動
部材で圧力室を第１圧力室と第２圧力室に気密的に仕切
り、補助のパイロット弁で開閉されるパイロット弁口を
第１圧力室に連通せしめ、第２圧力室を外気に連通せし
め、第１圧力室と出口を連通する細孔を設け、圧力応動
部材に主弁口を開閉する主弁体を連結した、ものであ
る。Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to dispose a pressure responsive member in a pressure chamber, and use the pressure responsive member to define the pressure chamber as a first pressure chamber and a first pressure chamber. Airtight partition into two pressure chambers, a pilot valve port that is opened and closed by an auxiliary pilot valve communicates with the first pressure chamber, a second pressure chamber communicates with the outside air, and a pore that communicates the first pressure chamber with the outlet. And a main valve body for opening and closing the main valve port is connected to the pressure responsive member.

作用 上記の技術的手段の作用は下記の通りである。Action The action of the above technical means is as follows.

補助のパイロット弁が開弁すると、入口側の復水が第１
圧力室に導入され、第１圧力室の圧力が上昇する。圧力
応動部材は第１圧力室の圧力と外気圧力である第２圧力
室との差圧で駆動され、主弁体が主弁口を開ける。即
ち、圧力応動部材は出口側圧力に拘らず、入口側圧力と
外気との差圧で駆動される。従って、出口側の圧力が高
くても、圧力応動部材を大きくせずに大きな主弁口を開
けることができる。When the auxiliary pilot valve opens, the condensate on the inlet side is the first
When introduced into the pressure chamber, the pressure in the first pressure chamber rises. The pressure responsive member is driven by the pressure difference between the pressure in the first pressure chamber and the second pressure chamber, which is the outside air pressure, and the main valve body opens the main valve port. That is, the pressure responsive member is driven by the pressure difference between the inlet side pressure and the outside air, regardless of the outlet side pressure. Therefore, even if the pressure on the outlet side is high, it is possible to open a large main valve opening without enlarging the pressure responsive member.

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（第
１図参照）。Example An example showing a specific example of the above technical means will be described (see FIG. 1).

本体１に蓋部材２、３をボルト（図示せず）で締結して
トラップケーシングを形成する。トラップケーシングの
内部は仕切壁４で、入口５の連通する復水溜り室６と出
口７の連通する出口側通路８に隔てられている。仕切壁
４の下部には弁座部材９が取り付けられ、弁座部材９に
は復水溜り室６と出口側通路８を連通する主弁口10が開
けられている。入口５は復水溜り室６の上部に開口し、
スクリーン11を介して連通している。入口５と出口７は
同一軸上にが形成されている。The lid members 2 and 3 are fastened to the main body 1 with bolts (not shown) to form a trap casing. The interior of the trap casing is a partition wall 4, which is divided into a condensate pool chamber 6 communicating with an inlet 5 and an outlet side passage 8 communicating with an outlet 7. A valve seat member 9 is attached to a lower portion of the partition wall 4, and a main valve port 10 that connects the condensate reservoir chamber 6 and the outlet side passage 8 is opened in the valve seat member 9. The inlet 5 opens at the top of the condensate chamber 6,
It communicates through the screen 11. The inlet 5 and the outlet 7 are formed on the same axis.

復水溜り室６内には補助のパイロット弁として球形のフ
ロート12が自由状態で収容される。フロート12は復水溜
り室６の液位に応じて浮上降下し、下記のパイロット弁
口18を開閉する。参照番号22はフロート12の最降下位置
を定めるフロート座である。A spherical float 12 is accommodated in the condensate reservoir 6 as an auxiliary pilot valve in a free state. The float 12 ascends and descends according to the liquid level in the condensate reservoir chamber 6, and opens and closes the pilot valve port 18 described below. Reference numeral 22 is a float seat that defines the most lowered position of the float 12.

本体１と蓋３で圧力室を形成する。圧力室は間に挟んだ
圧力応動部材としてのダイヤフラム13で第１圧力室14と
第２圧力室15に分割されている。ダイヤフラム13の中央
には先端が主弁口10を通って復水溜り室６内に突出した
弁軸16が取り付けられ、弁軸16の先端には主弁口10を復
水溜り室６側から開閉する主弁体17がねじ結合されてい
る。主弁体17及び弁軸16を貫通して復水溜り室６と第１
圧力室14を連通するパイロット弁口18が開けられてい
る。第２圧力15と出口側通路８との間は本体１と弁軸16
との間に介在させたＯリング19で気密的にシールされて
いる。第２圧力室15は連通孔20を介して外気に連通して
いる。第１圧力室14は細孔21を介して出口側通路８に連
通している。The body 1 and the lid 3 form a pressure chamber. The pressure chamber is divided into a first pressure chamber 14 and a second pressure chamber 15 by a diaphragm 13 as a pressure responsive member sandwiched between them. A valve shaft 16 is attached to the center of the diaphragm 13 with its tip protruding into the condensate reservoir chamber 6 through the main valve port 10. The main valve port 10 is attached to the tip of the valve shaft 16 from the condensate reservoir chamber 6 side. The main valve body 17 that opens and closes is screwed. The condensate chamber 6 and the first through the main valve body 17 and the valve shaft 16
A pilot valve port 18 communicating with the pressure chamber 14 is opened. Between the second pressure 15 and the outlet side passage 8, the main body 1 and the valve shaft 16
It is airtightly sealed by an O-ring 19 interposed between and. The second pressure chamber 15 communicates with the outside air via the communication hole 20. The first pressure chamber 14 communicates with the outlet-side passage 8 through the pore 21.

上記実施例の作動は下記の通りである。The operation of the above embodiment is as follows.

入口５から流入する復水量が微少または無い場合、フロ
ート12は降下してフロート座21に載り、入口側の流体圧
力で主弁体17を弁座部材９に付勢して主弁口10を閉じて
いる。次に入口５から多量の復水が流入する場合、フロ
ート12は復水溜り室６内の液位の上昇と共に浮上してパ
イロット弁口18を開ける。第１圧力室14内の圧力が上昇
してダイヤフラム13を復水溜り室６側へ押し、主弁体17
が主弁口10を開き、入口５からの復水を出口７へ排出す
る。When the amount of condensate flowing in from the inlet 5 is very small or absent, the float 12 descends and rests on the float seat 21, and the fluid pressure on the inlet side urges the main valve body 17 toward the valve seat member 9 so that the main valve opening 10 is opened. It's closed. Next, when a large amount of condensate flows in from the inlet 5, the float 12 rises as the liquid level in the condensate reservoir chamber 6 rises and opens the pilot valve port 18. The pressure in the first pressure chamber 14 rises and pushes the diaphragm 13 toward the condensate reservoir chamber 6 side, and the main valve body 17
Opens the main valve opening 10 and discharges the condensed water from the inlet 5 to the outlet 7.

上記の実施例に於いては、圧力応動部材としてダイヤフ
ラムを用いたが、ピストンやベローズ等を用いることも
できる。また、パイロット弁にはフロート式の外に、デ
ィスク式やバイメタル式等のあらゆる型式のスチームト
ラップを用いることができる。Although the diaphragm is used as the pressure responsive member in the above embodiment, a piston, a bellows or the like may be used. In addition to the float type, the pilot valve may be any type of steam trap such as a disc type or a bimetal type.

考案の効果 本考案は下記の特有の効果を生じる。Effect of the Invention The present invention has the following unique effects.

上記のように本考案によれば、圧力応動部材は入口側圧
力と外気との差圧で駆動されるので、小さな圧力応動部
材を用いて大きな主弁口を開けることができる。従っ
て、小型で大容量のスチームトラップを作ることができ
る。As described above, according to the present invention, since the pressure responsive member is driven by the differential pressure between the inlet side pressure and the outside air, it is possible to open the large main valve opening by using the small pressure responsive member. Therefore, a small-sized and large-capacity steam trap can be made.

【図面の簡単な説明】[Brief description of drawings]

第１図は本考案の実施例のパイロット式スチームトラッ
プの断面図である。 1:本体、5:入口 6:復水溜り室、7:出口 10:主弁口、12:フロート 13:ダイヤフラム、14:第１圧力室 15:第２圧力室、17:主弁体 18:パイロット弁口、19:Oリング 20:連通孔、21:細孔FIG. 1 is a sectional view of a pilot type steam trap according to an embodiment of the present invention. 1: Main body, 5: Inlet 6: Condensate chamber, 7: Outlet 10: Main valve port, 12: Float 13: Diaphragm, 14: First pressure chamber 15: Second pressure chamber, 17: Main valve body 18: Pilot valve port, 19: O-ring 20: Communication hole, 21: Pore

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】圧力室内に圧力応動部材を配置し、圧力応
動部材で圧力室を第１圧力室と第２圧力室に気密的に仕
切り、補助のパイロット弁で開閉されるパイロット弁口
を第１圧力室に連通せしめ、第２圧力室を外気に連通せ
しめ、第１圧力室と出口を連通する細孔を設け、圧力応
動部材に主弁口を開閉する主弁体を連結したパイロット
式スチームトラップ。1. A pressure responsive member is arranged in the pressure chamber, the pressure responsive member airtightly partitions the pressure chamber into a first pressure chamber and a second pressure chamber, and a pilot valve opening opened and closed by an auxiliary pilot valve is provided. Pilot type steam in which the first pressure chamber and the second pressure chamber are communicated with the outside air, the first pressure chamber and the outlet are provided with pores, and the pressure responsive member is connected to the main valve body for opening and closing the main valve opening. trap.