JP4800093B2 - Pilot steam trap - Google Patents

Pilot steam trap Download PDF

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Publication number
JP4800093B2
JP4800093B2 JP2006112421A JP2006112421A JP4800093B2 JP 4800093 B2 JP4800093 B2 JP 4800093B2 JP 2006112421 A JP2006112421 A JP 2006112421A JP 2006112421 A JP2006112421 A JP 2006112421A JP 4800093 B2 JP4800093 B2 JP 4800093B2
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pilot
float
valve
valve port
main valve
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JP2007285391A (en
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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部材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 member that is displaced by opening and closing of an auxiliary pilot valve. Regarding the steam trap.

このパイロット式スチームトラップは、例えば実開平4−42997号公報に示されている。これは、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であるフロートを、補助のパイロット弁であるパイロットフロートによるパイロット弁口の開閉で変位する圧力応動部材により開閉制御せしめるものであって、パイロットフロートが浮上してパイロット弁口を開くと圧力応動部材が上方に駆動されてフロートが持ち上げられて主弁口を開き、パイロットフロートが降下してパイロット弁口を閉じると圧力応動部材がフロートの自重で下方に押し下げられてフロートが主弁口を閉じるものである。 This pilot type steam trap is disclosed in, for example, Japanese Utility Model Publication No. 4-42997. This forms the inlet and the valve chamber and the outlet in the trap housing, the float is a main valve body for opening and closing a main valve port which communicates the valve chamber and the outlet, the pilot valve port by the pilot float is a pilot valve of the auxiliary Opening and closing control is performed by a pressure responsive member that is displaced by opening and closing, and when the pilot float rises and opens the pilot valve port, the pressure responsive member is driven upward to lift the float and open the main valve port. When the pilot valve port is closed and the pilot valve port is closed, the pressure responsive member is pushed downward by the weight of the float, and the float closes the main valve port .

上記従来のパイロット式スチームトラップにおいては、パイロットフロートが故障して閉弁できなくなりパイロット通路に蒸気を漏出すると、フロートが圧力応動部材により開弁せしめられて主弁口を閉じることができなくなる。そのため、主弁口から多量の蒸気を漏出してしまう問題点があった。 In the above-described conventional pilot steam trap, if the pilot float fails and cannot be closed, and the steam leaks into the pilot passage, the float is opened by the pressure responsive member and the main valve port cannot be closed. Therefore, there is a problem that a large amount of steam leaks from the main valve port.

従って、本発明の技術的課題は、パイロットフロートが故障して閉弁できなくなった場合であっても、フロートが主弁口を開閉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 technical problem of the present invention is to provide a pilot-type steam trap that allows the float to open and close the main valve port even when the pilot float fails and cannot be closed.

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であるフロートを、補助のパイロット弁であるパイロットフロートによるパイロット弁口の開閉で変位する圧力応動部材により開閉制御せしめるものであって、パイロットフロートが浮上してパイロット弁口を開くと圧力応動部材が上方に駆動されてフロートが持ち上げられて主弁口を開き、パイロットフロートが降下してパイロット弁口を閉じると圧力応動部材がフロートの自重で下方に押し下げられてフロートが主弁口を閉じるものにおいて、パイロットフロートと圧力応動部材とを連結するパイロット通路に、パイロット通路を低温時に開き蒸気漏洩による高温時に閉じる感温応動弁を配置したものである。 Technical means of the present invention taken in order to solve the technical problems described above, to form an inlet and the valve chamber and the outlet in the trap housing, in the main valve body for opening and closing a main valve port which communicates the valve chamber and the outlet A float is controlled to open and close by a pressure responsive member that is displaced by opening and closing the pilot valve port by a pilot float that is an auxiliary pilot valve . When the pilot float rises and opens the pilot valve port , the pressure responsive member moves upward. When the float is lifted to open the main valve port, the pilot float descends and the pilot valve port is closed, the pressure responsive member is pushed downward by the weight of the float, and the float closes the main valve port . the pilot passage connecting the pilot float and the pressure responding member, closed at a high temperature by the steam leakage open pilot passage at a low temperature It is obtained by disposing the temperature-sensitive responsive valve.

本発明は、パイロットフロートが故障して閉弁できなくなった場合であっても、フロートが主弁口を開閉することができるので、多量の蒸気を漏出することがないという優れた効果を生じる。 The present invention produces an excellent effect that a large amount of steam is not leaked because the float can open and close the main valve port even when the pilot float fails and cannot be closed.

本発明は、パイロットフロートと圧力応動部材とを連結するパイロット通路に感温応動弁を配置し、感温応動弁がパイロット通路を低温時に開き蒸気漏洩による高温時に閉じるものである。そのため、パイロットフロートが故障して閉弁できなくなりパイロット通路に蒸気を漏出すると、パイロット通路の温度が高温になり、感温応動弁がパイロット通路を閉じる。パイロット通路が閉じられると圧力応動部材が閉弁方向に変位してフロートが主弁口を閉じる。その後、放熱によりパイロット通路の温度が低下すると感温応動弁がパイロット通路を開く。パイロット通路が開かれると圧力応動部材が開弁方向に変位してフロートが主弁口を開く。これにより、パイロットフロートが故障して閉弁できなくなった場合であっても、フロートが主弁口を開閉することができる。 In the present invention, a temperature sensitive valve is disposed in a pilot passage connecting a pilot float and a pressure responsive member, and the temperature sensitive valve opens the pilot passage at a low temperature and closes it at a high temperature due to steam leakage. Therefore, if the pilot float fails and cannot be closed, and steam is leaked into the pilot passage, the temperature of the pilot passage becomes high, and the temperature sensitive valve closes the pilot passage. When the pilot passage is closed, the pressure responsive member is displaced in the valve closing direction, and the float closes the main valve port. Thereafter, when the temperature of the pilot passage decreases due to heat radiation, the temperature sensitive valve opens the pilot passage. When the pilot passage is opened, the pressure responsive member is displaced in the valve opening direction, and the float opens the main valve port. Thus, even when the pilot float fails and cannot be closed, the float can open and close the main valve port.

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を開閉する主弁体である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 which is 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との間に圧力室を形成する。圧力室内に圧力応動部材としてのピストン10を配置し、圧力室を第1圧力室11と第2圧力室12とに気密的に仕切る。ピストン10の上面に連結棒13を取付ける。連結棒13の先端は弁室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。第1圧力室11と第2圧力室12はピストン10に開けた細孔15を介して連結し、第1圧力室11は出口側通路16を介して出口5に連結する。   A pressure chamber is formed between the valve chamber 3 and the bottom lid 9 separated by a bottom wall. A piston 10 as a pressure responsive member is disposed in the pressure chamber, and the pressure chamber is hermetically partitioned into a first pressure chamber 11 and a second pressure chamber 12. A connecting rod 13 is attached to the upper surface of the piston 10. The distal end of the connecting rod 13 penetrates the bottom wall of the valve chamber 3 in an airtight manner, extends into the valve chamber 3, and contacts the float 8 via the receiving plate 14. The first pressure chamber 11 and the second pressure chamber 12 are connected to each other through a pore 15 opened in the piston 10, and the first pressure chamber 11 is connected to the outlet 5 through 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である中空球形のパイロットフロート19を自由状態で収容する。パイロットフロート19は液面と共に浮上降下し、下部側方に形成したパイロット弁口20を開閉する。パイロット弁口20と第2圧力室12をパイロット通路21を介して連結する。パイロット通路21に感温応動弁22を配置する。   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 19 as an auxiliary pilot valve is accommodated in a free state on the inlet 4 side. The pilot float 19 rises and falls together with the liquid level, and opens and closes a pilot valve port 20 formed on the lower side. The pilot valve port 20 and the second pressure chamber 12 are connected via a pilot passage 21. A temperature sensitive responsive valve 22 is disposed in the pilot passage 21.

感温応動弁22は、図2に一例を示す様に、流入口36を有する上ケース37と流出口38を有する下ケース39により内部に形成した弁室40内に感温部材41を配置したものである。感温部材41は、上下壁部材42,43および上下ダイヤフラム44,45のそれぞれの外周縁を溶接し、上壁部材42と上ダイヤフラム44の間に膨脹媒体46を封入し、下ダイヤフラム45に弁部材47を溶接したものである。膨脹媒体46は、水、水より沸点の低い液体、或いはそれらの混合物で形成する。感温部材41は、バネ48で下方に付勢し、複数の通過窓49を有する収容筒50の段部51に押圧する。感温部材41の弁部材47は、下方の弁座52に離着座して導出路53を開閉する。感温応動弁22は、パイロットフロート19がパイロット弁口20を閉じることができなくなり、パイロット通路21に蒸気を漏出してパイロット通路21の温度が高温になると、膨脹媒体46が膨脹して上下ダイヤフラム44,45を弁座52方向に変位せしめ、弁部材47が導出路53を閉じることによりパイロット通路21を閉じる。感温応動弁22は、放熱によりパイロット通路21の温度が低下すると、膨脹媒体46が収縮して上下ダイヤフラム44,45が弁座52から離れる方向に変位し、弁部材47が導出路53を開くことによりパイロット通路21を開く。   As shown in FIG. 2, the temperature sensitive valve 22 includes a temperature sensitive member 41 in a valve chamber 40 formed therein by an upper case 37 having an inlet 36 and a lower case 39 having an outlet 38. Is. The temperature sensing member 41 welds the outer peripheral edges of the upper and lower wall members 42 and 43 and the upper and lower diaphragms 44 and 45, encloses the expansion medium 46 between the upper wall member 42 and the upper diaphragm 44, and The member 47 is welded. The expansion medium 46 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof. The temperature sensing member 41 is urged downward by a spring 48 and presses against the step portion 51 of the housing cylinder 50 having a plurality of passage windows 49. The valve member 47 of the temperature sensing member 41 opens and closes the lead-out path 53 by being seated on the lower valve seat 52. When the pilot float 19 cannot close the pilot valve port 20 and the steam leaks into the pilot passage 21 and the temperature of the pilot passage 21 becomes high, the temperature sensing valve 22 expands the expansion medium 46 and the upper and lower diaphragms. 44 and 45 are displaced toward the valve seat 52, and the valve member 47 closes the lead-out path 53 to close the pilot passage 21. When the temperature of the pilot passage 21 decreases due to heat dissipation, the temperature sensitive valve 22 contracts the expansion medium 46 and displaces the upper and lower diaphragms 44 and 45 away from the valve seat 52, and the valve member 47 opens the outlet passage 53. As a result, the pilot passage 21 is opened.

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19は降下してパイロット弁口20を閉じている。第2圧力室12内の圧力は細孔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を閉じている。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19は液面の上昇と共に浮上してパイロット弁口20を開ける。パイロット弁口20が開けられると、入口4側の復水が第2圧力室12に供給され、第2圧力室12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が開いて復水が出口5に排出される。復水の排出により液面が低下すると、パイロットフロート19は液面の低下と共に降下してパイロット弁口20を閉じる。パイロット弁口20が閉じられると、第2圧力室12内の圧力が細孔15を通して出口5側に抜け、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を閉じる。   When there is little or no condensate flowing in from the inlet 4, the pilot float 19 descends and closes the pilot valve port 20. Since the pressure in the second pressure chamber 12 is released to the outlet 5 side through the pore 15, the piston 10 is pushed downward by the weight of the float 8, the float 8 is seated on the valve seat 7 and the main valve port 6 is closed. Yes. When a large amount of condensate flows from the inlet 4, the pilot float 19 rises as the liquid level rises and opens the pilot valve port 20. When the pilot valve port 20 is opened, the condensate on the inlet 4 side is supplied to the second pressure chamber 12, the pressure in the second pressure chamber 12 rises, the piston 10 is driven upward, and the float 8 is lifted. The main valve port 6 is opened and the condensate is discharged to the outlet 5. When the liquid level decreases due to the discharge of the condensate, the pilot float 19 descends with the liquid level decreasing and closes the pilot valve port 20. When the pilot valve port 20 is closed, the pressure in the second pressure chamber 12 is released to the outlet 5 side through the pore 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. Close the main valve port 6.

感温応動弁22は、パイロットフロート19がパイロット弁口20を閉じることができなくなり、パイロット通路21に蒸気を漏出してパイロット通路21の温度が高温になると、パイロット通路21を閉じる。パイロット通路21が閉じられると、第2圧力室12内の圧力は細孔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を閉じる。感温応動弁22は、放熱によりパイロット通路21の温度が低下すると、パイロット通路21を開く。パイロット通路21が開かれると、入口4側の復水が第2圧力室12に供給され、第2圧力室12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が開いて復水が出口5に排出される。   The temperature sensitive valve 22 closes the pilot passage 21 when the pilot float 19 cannot close the pilot valve port 20 and the steam leaks into the pilot passage 21 and the temperature of the pilot passage 21 becomes high. When the pilot passage 21 is closed, the pressure in the second pressure chamber 12 is released to the outlet 5 side through the pore 15, so that the piston 10 is pushed downward by the weight of the float 8 and the float 8 is seated on the valve seat 7. Close the main valve port 6. The temperature sensitive responsive valve 22 opens the pilot passage 21 when the temperature of the pilot passage 21 decreases due to heat radiation. When the pilot passage 21 is opened, the condensate on the inlet 4 side is supplied to the second pressure chamber 12, the pressure in the second pressure chamber 12 rises, the piston 10 is driven upward, and the float 8 is lifted. The main valve port 6 is opened and the condensate is discharged to the outlet 5.

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. 図1のパイロット式スチームトラップに用いる感温応動弁の断面図である。It is sectional drawing of the temperature sensitive responsive valve used for the pilot type steam trap of FIG.

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
11 第1圧力室
12 第2圧力室
19 パイロットフロート
20 パイロット弁口
21 パイロット通路
22 感温応動弁
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Valve chamber 4 Inlet 5 Outlet 6 Main valve port 8 Float 10 Piston 11 First pressure chamber 12 Second pressure chamber 19 Pilot float 20 Pilot valve port 21 Pilot passage 22 Temperature sensitive 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であるフロートを、補助のパイロット弁であるパイロットフロートによるパイロット弁口の開閉で変位する圧力応動部材により開閉制御せしめるものであって、パイロットフロートが浮上してパイロット弁口を開くと圧力応動部材が上方に駆動されてフロートが持ち上げられて主弁口を開き、パイロットフロートが降下してパイロット弁口を閉じると圧力応動部材がフロートの自重で下方に押し下げられてフロートが主弁口を閉じるものにおいて、パイロットフロートと圧力応動部材とを連結するパイロット通路に、パイロット通路を低温時に開き蒸気漏洩による高温時に閉じる感温応動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。 The trap casing forms the inlet, valve chamber, and outlet, and the float that is the main valve body that opens and closes the main valve port that connects the valve chamber and the outlet is displaced by opening and closing the pilot valve port with the pilot float that is the auxiliary pilot valve When the pilot float rises and opens the pilot valve port, the pressure responsive member is driven upward to lift the float, open the main valve port, and the pilot float descends. When the pilot valve port is closed, the pressure responsive member is pushed downward by the weight of the float, and the float closes the main valve port.In the pilot passage that connects the pilot float and the pressure responsive member, the pilot passage is opened at low temperatures. Pilot-type steam valve with a temperature sensitive valve that closes at high temperature due to steam leakage -Up.
JP2006112421A 2006-04-14 2006-04-14 Pilot steam trap Expired - Fee Related JP4800093B2 (en)

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JP4800093B2 true JP4800093B2 (en) 2011-10-26

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CN107061981B (en) * 2017-04-21 2023-11-17 湖州职业技术学院 Pilot-operated steam trap

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JPH0250710A (en) * 1988-08-12 1990-02-20 Tlv Co Ltd Pressure reducing valve for vacuum
JPH0442997U (en) * 1990-08-09 1992-04-13
JP2562394Y2 (en) * 1991-10-15 1998-02-10 株式会社テイエルブイ Pilot type steam trap
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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