JP2009168084A - Pilot type steam trap - Google Patents

Pilot type steam trap Download PDF

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Publication number
JP2009168084A
JP2009168084A JP2008005292A JP2008005292A JP2009168084A JP 2009168084 A JP2009168084 A JP 2009168084A JP 2008005292 A JP2008005292 A JP 2008005292A JP 2008005292 A JP2008005292 A JP 2008005292A JP 2009168084 A JP2009168084 A JP 2009168084A
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Japan
Prior art keywords
valve
pilot
passage
chamber
outlet
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JP2008005292A
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Japanese (ja)
Inventor
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 JP2008005292A priority Critical patent/JP2009168084A/en
Publication of JP2009168084A publication Critical patent/JP2009168084A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pilot type steam trap, in which steam will not leak when a three-way valve is operated to make a primary side passage continuous with a pilot passage for dissolving air locking. <P>SOLUTION: The pilot type steam trap, an inlet 4, a valve chamber 3, and an outlet 5 are formed of a trap casing formed by fastening a lid member 2 to a main body 1. A float 8 (main valve element) to open/close a main valve port 6 for making the valve chamber 3 continuous with the outlet 5 is controlled to be opened/closed by a piston 10 (pressure-operating valve) that is displaced as a pilot float valve 19 (auxiliary pilot valve) is opened/closed. A primary side passage 22 connected from a condensation sump at a lower part of the valve chamber 3 is merged with a pilot passage 21 connecting the pilot float valve 19 (auxiliary pilot valve) to the piston 10 (pressure-operating valve), and the three-way valve 23 is disposed on their merging part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は蒸気配管系に発生する復水を排出するスチームトラップに関し、特に、補助のパイロット弁の開閉で変位する圧力応動弁により主弁体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。   The present invention relates to a steam trap that discharges condensate generated in a steam piping system, and in particular, a pilot that opens and closes a main valve port by driving a main valve body by a pressure responsive valve that is displaced by opening and closing of an auxiliary pilot valve. Regarding the steam trap.

この種のパイロット式スチームトラップは、トラップ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主弁口を開閉する主弁体を、補助のパイロット弁の開閉で変位する圧力応動弁により開閉制御せしめるものである。この場合、入口から弁室内に空気が流入してくるとエアーロッキングが起こる問題がある。   This type of pilot-type steam trap has a trap casing that forms an inlet, a valve chamber, and an outlet. The main valve body that opens and closes the main valve port that connects the valve chamber and the outlet is displaced by the opening and closing of the auxiliary pilot valve. The valve is controlled to open and close by a responsive valve. In this case, there is a problem that air locking occurs when air flows into the valve chamber from the inlet.

そこで、従来は実用新案登録第2562905号に示される解決策が用いられていた。これは、補助のパイロット弁と圧力応動弁とを連結するパイロット通路に入口通路から連結する一次側通路を合流せしめ、合流部に三方弁を配置したもので、エアーロッキングが起こった場合は、三方弁を操作して一次側通路とパイロット通路とを連通状態とすることにより、圧力応動弁により主弁体を強制的に開弁方向に駆動して主弁口を開口せしめて空気を素早く出口に排出するものである。しかしながら、この従来のものにおいては、エアーロッキングを解消するために三方弁を操作して一次側通路とパイロット通路とを連通状態としたときに、入口通路の蒸気が一次側通路からパイロット通路に供給されるために蒸気を漏出してしまう問題点があった。
実用新案登録第2562905号
Therefore, conventionally, the solution shown in Utility Model Registration No. 2562905 has been used. This is because the primary passage connected from the inlet passage is joined to the pilot passage connecting the auxiliary pilot valve and the pressure responsive valve, and a three-way valve is arranged at the junction. By operating the valve so that the primary passage and the pilot passage are in communication, the main valve body is forcibly driven in the valve opening direction by the pressure responsive valve to open the main valve port and quickly bring air into the outlet. To be discharged. However, in this conventional system, when the three-way valve is operated to eliminate the air locking and the primary passage and the pilot passage are in communication with each other, steam in the inlet passage is supplied from the primary passage to the pilot passage. Therefore, there was a problem that the steam leaked out.
Utility model registration No. 2562905

従って、本発明の技術的課題は、エアーロッキングを解消するために三方弁を操作して一次側通路とパイロット通路とを連通状態としたときに、蒸気を漏出することのない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 technical problem of the present invention is to provide a pilot-type steam trap that does not leak steam when the three-way valve is operated to bring the primary side passage and the pilot passage into communication with each other in order to eliminate air locking. Is to provide.

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、トラップ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主弁口を開閉する主弁体を、補助のパイロット弁の開閉で変位する圧力応動弁により開閉制御せしめるものにおいて、補助のパイロット弁と圧力応動弁とを連結するパイロット通路に弁室下部の復水溜り部から連結する一次側通路を合流せしめ、合流部に三方弁を配置したものである。   The technical means of the present invention devised to solve the above technical problem is that a trap casing forms an inlet, a valve chamber, and an outlet, and a main valve body that opens and closes a main valve port that communicates the valve chamber and the outlet. The primary side passage connected to the pilot passage connecting the auxiliary pilot valve and the pressure responsive valve from the condensate reservoir at the lower part of the valve chamber is controlled by a pressure responsive valve displaced by opening and closing of the auxiliary pilot valve. The three-way valve is arranged at the junction.

本発明は、エアーロッキングを解消するために三方弁を操作して一次側通路とパイロット通路とを連通状態としたときに、弁室下部の復水溜り部の復水が一次側通路からパイロット通路に供給されるので、蒸気を漏出することのないパイロット式スチームトラップを提供することができるという優れた効果を生じる。   In the present invention, when the three-way valve is operated to cancel the air locking and the primary passage and the pilot passage are in communication with each other, the condensate in the condensate reservoir at the lower part of the valve chamber is removed from the primary passage. Therefore, it is possible to provide a pilot-type steam trap that does not leak steam.

本発明は、補助のパイロット弁と圧力応動弁とを連結するパイロット通路に弁室下部の復水溜り部から連結する一次側通路を合流せしめ、合流部に三方弁を配置したものである。そのため、エアーロッキングを解消するために三方弁を操作して一次側通路とパイロット通路とを連通状態とすると、弁室下部の復水溜り部の復水が一次側通路からパイロット通路に供給され、圧力応動弁により主弁体を強制的に開弁方向に駆動して主弁口を開口せしめて空気を素早く出口に排出するので、蒸気を漏出することがない。   In the present invention, a primary passage connected from a condensate reservoir at the lower part of a valve chamber is joined to a pilot passage connecting an auxiliary pilot valve and a pressure responsive valve, and a three-way valve is arranged at the joining portion. Therefore, when the three-way valve is operated to cancel the air locking and the primary side passage and the pilot passage are in communication with each other, the condensate in the condensate reservoir at the lower part of the valve chamber is supplied from the primary side passage to the pilot passage, Since the main valve body is forcibly driven in the valve opening direction by the pressure responsive valve to open the main valve port and the air is quickly discharged to the outlet, steam is not leaked.

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)。
本体1に蓋部材2を締結して内部に弁室3を有するトラップケーシングを形成する。トラップケーシングの上部に入口4と出口5を同一軸上に形成する。弁室3と出口5を連通する主弁口6を開けた弁座7を弁室3の下部側方に取付ける。弁室3内に主弁口6を開閉する主弁体としての中空球形のフロート8を自由状態で収容する。
An embodiment showing a specific example of the above technical means will be described (see FIG. 1).
A lid casing 2 is fastened to the main body 1 to form a trap casing having a valve chamber 3 therein. An inlet 4 and an outlet 5 are formed on the same axis at the top of the trap casing. A valve seat 7 having a main valve port 6 communicating with the valve chamber 3 and the outlet 5 is attached to the lower side of the valve chamber 3. A hollow spherical float 8 as a main valve body for opening and closing the main valve port 6 is accommodated in the valve chamber 3 in a free state.

弁室3の底壁で隔てて底蓋9との間に圧力応動弁としてのピストン10を収容するピストン収容室を形成する。ピストン収容室はピストン10で気密的に仕切られ、一方が圧力室11を形成し、他方が出口側室12を形成する。ピストン10の上面に連結棒13を取付ける。連結棒13は圧力応動弁の一部を構成し、先端は弁室3の底壁を気密的に貫通して弁室3内に延び、受け板14を介してフロート8に当接する。受け板14は圧力応動弁の一部を構成する。圧力室11と出口側室12はピストン10に開けた第2オリフィス15を介して連結し、出口側室12は出口側通路16を介して出口5に連結する。   A piston accommodating chamber for accommodating a piston 10 as a pressure responsive valve is formed between the bottom lid 9 and the bottom lid 9 separated by a bottom wall of the valve chamber 3. The piston accommodating chamber is hermetically partitioned by the piston 10, one forming the pressure chamber 11 and the other forming the outlet side chamber 12. A connecting rod 13 is attached to the upper surface of the piston 10. The connecting rod 13 constitutes a part of the pressure responsive valve, and its tip penetrates the bottom wall of the valve chamber 3 in an airtight manner, extends into the valve chamber 3, and abuts on the float 8 via the receiving plate 14. The receiving plate 14 constitutes a part of the pressure responsive valve. The pressure chamber 11 and the outlet side chamber 12 are connected via a second orifice 15 opened in the piston 10, and the outlet side chamber 12 is connected to the outlet 5 via an outlet side passage 16.

弁室3内には上端が開口し、下部に連通孔17を開けた隔壁18を設け、その入口4側に補助のパイロット弁としての中空球形のパイロットフロート弁19を自由状態で収容する。パイロットフロート弁19は液面と共に浮上降下し、下部側方に形成した第1オリフィス20を開閉し、パイロット通路21を介して圧力室11内に復水を導入して圧力を制御してピストン10を駆動する。第2オリフィス15の開口面積は第1オリフィス20の開口面積よりも小さく形成する。パイロット通路21はパイロットフロート弁19とピストン10を連結する。パイロット通路21に弁室3の下部の復水溜り部から連結する一次側通路22を合流させ、合流部に三方弁23を配置する。図示の状態はパイロット通路21を介して第1オリフィス20と圧力室11が連結し、一次側通路22を遮断した状態を示している。この状態から三方弁23を操作することにより、一次側通路22を圧力室11に連結した状態と、第1オリフィス20および一次側通路22を圧力室11と遮断した状態に切換えることができる。   A partition wall 18 having an upper end opened in the valve chamber 3 and a communication hole 17 formed in the lower portion is provided, and a hollow spherical pilot float valve 19 as an auxiliary pilot valve is accommodated in a free state on the inlet 4 side. The pilot float valve 19 rises and falls together with the liquid level, opens and closes the first orifice 20 formed on the lower side, introduces condensate into the pressure chamber 11 through the pilot passage 21, and controls the pressure to control the piston 10. Drive. The opening area of the second orifice 15 is formed smaller than the opening area of the first orifice 20. The pilot passage 21 connects the pilot float valve 19 and the piston 10. A primary passage 22 connected to the pilot passage 21 from a condensate reservoir at the lower part of the valve chamber 3 is joined, and a three-way valve 23 is arranged at the joining portion. The state shown in the figure shows a state in which the first orifice 20 and the pressure chamber 11 are connected via the pilot passage 21 and the primary side passage 22 is blocked. By operating the three-way valve 23 from this state, it is possible to switch between the state in which the primary side passage 22 is connected to the pressure chamber 11 and the state in which the first orifice 20 and the primary side passage 22 are disconnected from the pressure chamber 11.

通常のトラップとして機能させる場合は、三方弁23を操作してパイロット通路21を開けて第1オリフィス20と圧力室11を連通状態にすると共に、一次側通路22を合流部で遮断する。入口4から流入する復水が微少または無いと、パイロットフロート弁19は降下して第1オリフィス20を閉口している。圧力室11内の圧力は第2オリフィス15を通して出口5側に抜けるため、ピストン10がフロート8の自重で下方に押し下げられ、フロート8が弁座7に着座して主弁口6を閉口している。入口4から多量の復水が流入してくると、パイロットフロート弁19は液位の上昇と共に浮上して第1オリフィス20を開口する。これにより、弁室3の復水が圧力室11に供給され、圧力室11内の圧力が上昇し、ピストン10が上方に駆動されてフロート8が持ち上げられ、主弁口6が開口されて復水が出口5に排出される。エアーロッキングが起こった場合は、三方弁23を図示の状態から反時計回り方向に90度あるいは180度回転させて、一次側通路22を開けて圧力室11と連通状態にする。これにより、弁室3の復水が圧力室11に供給され、圧力室11内の圧力が上昇し、ピストン10が上方に駆動されてフロート8が持ち上げられ、主弁口6が開口されて空気および復水が出口5に排出される。また三方弁23を図示の状態から時計回り方向に90度回転させて、第1オリフィス20および一次側通路22を圧力室11と遮断した状態にすることにより、トラップを閉弁せしめることができる。   When functioning as a normal trap, the three-way valve 23 is operated to open the pilot passage 21 to bring the first orifice 20 and the pressure chamber 11 into communication, and the primary side passage 22 is blocked at the junction. When there is little or no condensate flowing in from the inlet 4, the pilot float valve 19 is lowered to close the first orifice 20. Since the pressure in the pressure chamber 11 is released to the outlet 5 side through the second orifice 15, the piston 10 is pushed downward by the weight of the float 8, and the float 8 is seated on the valve seat 7 to close the main valve port 6. Yes. When a large amount of condensate flows from the inlet 4, the pilot float valve 19 rises as the liquid level rises and opens the first orifice 20. As a result, the condensate in the valve chamber 3 is supplied to the pressure chamber 11, the pressure in the pressure chamber 11 rises, the piston 10 is driven upward, the float 8 is lifted, the main valve port 6 is opened, and the condensate is recovered. Water is discharged to the outlet 5. When air locking occurs, the three-way valve 23 is rotated 90 degrees or 180 degrees in the counterclockwise direction from the illustrated state to open the primary side passage 22 to be in communication with the pressure chamber 11. As a result, the condensate in the valve chamber 3 is supplied to the pressure chamber 11, the pressure in the pressure chamber 11 rises, the piston 10 is driven upward, the float 8 is lifted, the main valve port 6 is opened, and the air is opened. And condensate is discharged to the outlet 5. Further, the trap can be closed by rotating the three-way valve 23 90 degrees in the clockwise direction from the illustrated state so that the first orifice 20 and the primary passage 22 are disconnected from the pressure chamber 11.

本発明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。It is sectional drawing of the pilot type steam trap of the Example of this invention.

符号の説明Explanation of symbols

1 本体
2 蓋部材
3 弁室
4 入口
5 出口
6 主弁口
8 フロート
10 ピストン
19 パイロットフロート弁
21 パイロット通路
22 一次側通路
23 三方弁
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Valve chamber 4 Inlet 5 Outlet 6 Main valve port 8 Float 10 Piston 19 Pilot float valve 21 Pilot passage 22 Primary side passage 23 Three-way valve

Claims (1)

トラップ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主弁口を開閉する主弁体を、補助のパイロット弁の開閉で変位する圧力応動弁により開閉制御せしめるものにおいて、補助のパイロット弁と圧力応動弁とを連結するパイロット通路に弁室下部の復水溜り部から連結する一次側通路を合流せしめ、合流部に三方弁を配置したことを特徴とするパイロット式スチームトラップ。
In the trap casing, an inlet, a valve chamber, and an outlet are formed, and the main valve body that opens and closes the main valve port that communicates the valve chamber and the outlet is controlled to open and close by a pressure responsive valve that is displaced by opening and closing of the auxiliary pilot valve. A pilot-type steam trap characterized in that a primary passage connected from a condensate reservoir at the lower part of the valve chamber is joined to a pilot passage connecting an auxiliary pilot valve and a pressure responsive valve, and a three-way valve is arranged at the junction. .
JP2008005292A 2008-01-15 2008-01-15 Pilot type steam trap Pending JP2009168084A (en)

Priority Applications (1)

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JP2008005292A JP2009168084A (en) 2008-01-15 2008-01-15 Pilot type steam trap

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Application Number Priority Date Filing Date Title
JP2008005292A JP2009168084A (en) 2008-01-15 2008-01-15 Pilot type steam trap

Publications (1)

Publication Number Publication Date
JP2009168084A true JP2009168084A (en) 2009-07-30

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ID=40969496

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Application Number Title Priority Date Filing Date
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Country Link
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156723A (en) * 1974-06-10 1975-12-18
JPS50157929A (en) * 1974-06-12 1975-12-20
JP2562905Y2 (en) * 1991-12-13 1998-02-16 株式会社テイエルブイ Pilot type steam trap

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156723A (en) * 1974-06-10 1975-12-18
JPS50157929A (en) * 1974-06-12 1975-12-20
JP2562905Y2 (en) * 1991-12-13 1998-02-16 株式会社テイエルブイ Pilot type steam trap

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