JP5373445B2

JP5373445B2 - Thermally responsive steam trap

Info

Publication number: JP5373445B2
Application number: JP2009062530A
Authority: JP
Inventors: 剛士福田
Original assignee: Tlv Co Ltd
Current assignee: Tlv Co Ltd
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2013-12-18
Anticipated expiration: 2029-03-16
Also published as: JP2010216537A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermally reactive steam trap for allowing the washing of foreign matters deposited on the inner face on the valve chest side of a valve hole without lowering the drain flow amount of condensate while maintaining a steam trap function to drain condensate without leaking steam when an expansion rate is a predetermined value or higher because of the transformation of an expansive/contractive medium. <P>SOLUTION: The thermally reactive steam trap includes a body 1 and a cover 2 to form an inlet 4, a valve chest 3 and an outlet 5, a valve seat member 7 having the valve hole 10 for communicating the valve chest 3 with the outlet side, and arranged between the valve chest 3 and the outlet 5, and a temperature control element 12 using the expansive/contractive medium 18, and arranged in the valve chest 3. The valve seat member 7 is formed spherical, and the valve hole 10 is T-shaped. The spherical valve seat member 7 having the T-shaped valve hole 10 whose long passage has one end 10c formed in an orifice passage is arranged on the body 1 in a rotation operable manner. A bypass line 8 communicating the inlet 4 with the spherical valve seat member 7 is formed in the body 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、加熱されて膨脹し冷却されて収縮する膨脹収縮媒体を含む温度制御機素を用いて、各種蒸気使用機器や蒸気配管で発生する復水を自動的に排出する熱応動式スチームトラップに関し、特に、温度制御機素により開閉される弁孔の内面に付着した異物を洗浄できると共に、膨脹収縮媒体の変質により膨脹割合が所定値以上になった場合に復水を排出し蒸気を漏出することのないスチームトラップ機能を維持できるものに関する。 The present invention relates to a thermally responsive steam trap that automatically discharges condensate generated in various steam-using devices and steam pipes using a temperature control element including an expansion / contraction medium that expands when heated and contracts when cooled and contracts. In particular, foreign matter adhering to the inner surface of the valve hole that is opened and closed by the temperature control element can be cleaned, and condensate is discharged and steam is leaked when the expansion ratio exceeds a predetermined value due to the alteration of the expansion / contraction medium It is related with what can maintain the steam trap function which does not do.

従来の熱応動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、ケーシングで入口と弁室と出口を形成し、弁室を出口側に連通する弁孔を有する弁座部材を弁室と出口との間に配置し、壁部材とダイヤフラム部材と両部材の間に密封した膨脹収縮媒体とダイヤフラム部材の弁座部材側に連結した弁部材とから成る温度制御機素を弁室内に配置したものにおいて、弁孔の下流側に弁孔よりも開口面積の小さなオリフィス通路を形成し、オリフィス通路の上端に一部を位置せしめた転動部材をオリフィス通路を貫通して配置したものである。 A conventional thermally responsive steam trap is disclosed in Patent Document 1, for example. In this case, a valve seat member having a valve hole that communicates the valve chamber with the outlet side is formed between the valve chamber and the outlet, and a wall member, a diaphragm member, and both members are formed in the casing. A temperature control element comprising an expansion / contraction medium sealed between and a valve member connected to the valve seat member side of the diaphragm member is disposed in the valve chamber, and the opening area is smaller than the valve hole on the downstream side of the valve hole. A small orifice passage is formed, and a rolling member partially positioned at the upper end of the orifice passage is disposed through the orifice passage.

特開平９−３０３６８６号公報JP-A-9-303686

上記従来の熱応動式スチームトラップは、弁孔の下流側に開口面積の小さなオリフィス通路を形成して、弁孔の圧力をその上流側の圧力に近い高圧に保ち、復水を緩やかに弁孔を流下させることにより、弁孔の表面に異物が付着することを防止する。復水はオリフィス通路を高速に流れ、異物がオリフィス通路の表面に付着することとなるが、このオリフィス通路の表面に付着する異物を復水流によって転動する転動部材によって取除くものである。しかしながら、弁孔の下流側に開口面積の小さなオリフィス通路を形成したものであるので、復水の排出流量が低下する問題点があった。また、膨脹収縮媒体の変質により膨脹割合が所定値以上になると弁孔を開口できなくなり、復水を排出し蒸気を漏出することのないスチームトラップ機能を維持できなくなる問題点があった。 The above-mentioned conventional thermally responsive steam trap has an orifice passage with a small opening area on the downstream side of the valve hole to maintain the pressure of the valve hole at a high pressure close to the pressure on the upstream side, and gently condensate the valve hole. By flowing down, foreign matter is prevented from adhering to the surface of the valve hole. Condensate flows at high speed through the orifice passage, and foreign matter adheres to the surface of the orifice passage. The foreign matter attached to the surface of the orifice passage is removed by a rolling member that rolls with the condensate flow. However, since an orifice passage having a small opening area is formed on the downstream side of the valve hole, there is a problem that the discharge flow rate of the condensate decreases. Further, when the expansion ratio exceeds a predetermined value due to alteration of the expansion / contraction medium, there is a problem that the valve hole cannot be opened and the steam trap function that does not discharge condensate and leak steam can be maintained.

したがって本発明が解決しようとする課題は、復水の排出流量を低下させずに弁孔の弁室側の内面に付着した異物を洗浄できると共に、膨脹収縮媒体の変質により膨脹割合が所定値以上になった場合に復水を排出し蒸気を漏出することのないスチームトラップ機能を維持できる熱応動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 that foreign matter adhering to the inner surface of the valve hole on the valve chamber side can be cleaned without reducing the condensate discharge flow rate, and the expansion ratio is not less than a predetermined value due to alteration of the expansion / contraction medium. It is to provide a thermally responsive steam trap that can maintain a steam trap function without discharging condensate and leaking steam in the event of an accident.

上記の課題を解決するために、本発明の熱応動式スチームトラップは、ケーシングで入口と弁室と出口を形成し、弁室を出口側に連通する弁孔を有する弁座部材を弁室と出口との間に配置し、壁部材とダイヤフラム部材と両部材の間に密封した膨脹収縮媒体とダイヤフラム部材の弁座部材側に連結した弁部材とから成る温度制御機素を弁室内に配置したものにおいて、弁座部材を球形に形成すると共に弁孔をＴ字状に形成しＴ字状の弁孔の長通路の一端をオリフィス通路に形成した球形弁座部材をケーシングに回転操作可能に配置し、入口と球形弁座部材を連通するバイパス通路をケーシングに形成し、球形弁座部材を外部から回転操作することによりＴ字状の弁孔の短通路から長通路の他端を通して弁室と出口側とを連通する第１状態とＴ字状の弁孔の長通路の他端から短通路を通してバイパス通路と出口側とを連通する第２状態とＴ字状の弁孔の短通路から長通路の一端のオリフィス通路を通してバイパス通路と出口側とを連通する第３状態に切り替えることができることを特徴とするものである。 In order to solve the above-described problems, the thermally responsive steam trap of the present invention includes a valve seat member having a valve hole that forms an inlet, a valve chamber, and an outlet in a casing and communicates the valve chamber with the outlet side. A temperature control element arranged between the outlet and the wall member, the diaphragm member, an expansion / contraction medium sealed between the two members, and a valve member connected to the valve seat member side of the diaphragm member is arranged in the valve chamber. The valve seat member is formed in a spherical shape, the valve hole is formed in a T-shape, and a spherical valve seat member in which one end of the long passage of the T-shaped valve hole is formed in the orifice passage is rotatably disposed on the casing. A bypass passage communicating with the inlet and the spherical valve seat member is formed in the casing, and the spherical valve seat member is rotated from the outside to rotate the valve chamber through the other end of the long passage from the short passage of the T-shaped valve hole. The first state communicating with the exit side and T The second state where the bypass passage communicates with the outlet side through the short passage from the other end of the long passage of the valve-shaped valve hole, and the bypass passage and the outlet side through the orifice passage of one end of the long passage from the short passage of the T-shaped valve hole It can switch to the 3rd state which communicates.

本発明によれば、球形弁座部材を外部から回転操作してＴ字状の弁孔の長通路の他端から短通路を通してバイパス通路と出口側とを連通する第２状態とすることにより、入口側の高圧蒸気が高速でＴ字状の弁孔を長通路の他端から短通路へ流下して短通路の内面を逆洗するので、通常は弁孔の弁室側である短通路の内面に付着した異物を簡単に確実に洗浄できるという効果を奏する。また、球形弁座部材を外部から回転操作してＴ字状の弁孔の短通路から長通路の一端のオリフィス通路を通してバイパス通路と出口側とを連通する第３状態とすることにより、適宜径のオリフィスに形成したオリフィス通路を通してバイパス通路と出口側とを連通して復水を排出し蒸気を漏出することのないスチームトラップ機能を維持できるという効果を奏する。 According to the present invention, by rotating the spherical valve seat member from the outside to the second state in which the bypass passage communicates with the outlet side through the short passage from the other end of the long passage of the T-shaped valve hole, The high-pressure steam on the inlet side flows down the T-shaped valve hole from the other end of the long passage to the short passage at high speed to back-wash the inner surface of the short passage. There is an effect that foreign substances adhering to the inner surface can be easily and reliably cleaned. Further, the spherical valve seat member is rotated from the outside so that the bypass passage and the outlet side communicate with each other through the orifice passage at one end of the long passage from the short passage of the T-shaped valve hole. It is possible to maintain the steam trap function that allows the bypass passage and the outlet side to communicate with each other through the orifice passage formed in the orifice and discharges condensate and does not leak steam.

本発明の実施の形態に係わる熱応動式スチームトラップの断面図である。It is sectional drawing of the thermally responsive 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に蓋２を締結して内部に弁室３を有するケーシングを形成する。本体１は入口４と出口５を有すると共に入口４を弁室３に連通する入口通路６と入口４を下記の球形弁座部材７に連通するバイパス通路８と球形弁座部材７を出口５に連通する出口通路９を有する。弁室３の下方にＴ字状の弁孔１０を開けた球形弁座部材７を配置する。球形弁座部材７は点線で示す弁軸１１を本体１から外部に貫通して連結することにより回転操作可能に取り付ける。Ｔ字状の弁孔１０は通常は弁室３側である短通路１０ａと、通常は出口５側である長通路の他端１０ｂと、適宜径のオリフィスに形成したオリフィス通路である長通路の一端１０ｃと、から形成される。 Hereinafter, an embodiment of the present invention will be described with reference to FIG. A lid 2 is fastened to the main body 1 to form a casing having a valve chamber 3 therein. The main body 1 has an inlet 4 and an outlet 5, and an inlet passage 6 that communicates the inlet 4 with the valve chamber 3, and a bypass passage 8 that communicates the inlet 4 with the spherical valve seat member 7 described below and a spherical valve seat member 7 at the outlet 5. It has an exit passage 9 that communicates. A spherical valve seat member 7 having a T-shaped valve hole 10 is disposed below the valve chamber 3. The spherical valve seat member 7 is attached so as to be rotatable by connecting a valve shaft 11 indicated by a dotted line from the main body 1 to the outside. The T-shaped valve hole 10 has a short passage 10a which is normally on the valve chamber 3 side, a second passage 10b which is usually on the outlet 5 side, and a long passage which is an orifice passage formed in an orifice having an appropriate diameter. And one end 10c.

弁室５内に温度制御機素１２を配置する。温度制御機素１２は上壁部材１４と、上壁部材１４との間に膨脹収縮媒体１８を密封したダイヤフラム部材１７と、ダイヤフラム部材１７に固着した弁部材１９と、ダイヤフラム部材１７の外周縁を上壁部材１４との間に挟んで固着した下壁部材２０と、から形成される。膨脹収縮媒体１８は、水、水より沸点の低い液体、あるいはそれらの混合物で形成される。 A temperature control element 12 is disposed in the valve chamber 5. The temperature control element 12 includes an upper wall member 14, a diaphragm member 17 in which an expansion / contraction medium 18 is sealed between the upper wall member 14, a valve member 19 fixed to the diaphragm member 17, and an outer peripheral edge of the diaphragm member 17. And a lower wall member 20 fixed between the upper wall member 14 and the upper wall member 14. The expansion / contraction medium 18 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

図示は球形弁座部材７により、Ｔ字状の弁孔１０の短通路１０ａから長通路の他端１０ｂを通して弁室３と出口通路９が連通され、バイパス通路８と出口通路９が遮断された第１状態を示している。図示の位置から弁軸１１を回転操作して球形弁座部材７を９０度時計回り方向へ回転させることにより、Ｔ字状の弁孔１０の長通路の他端１０ｂから短通路１０ａを通してバイパス通路８と出口通路９が連通され、Ｔ字状の弁孔１０の長通路の一端１０ｃから短通路１０ａを通して弁室３と出口通路９が連通された第２状態となる。また、図示の位置から弁軸１１を回転操作して球形弁座部材７を１８０度回転させることにより、Ｔ字状の弁孔１０の短通路１０ａから長通路の一端１０ｃを通してバイパス通路８と出口通路９が連通され、弁室３と出口通路９が遮断された第３状態となる。 In the drawing, the valve chamber 3 and the outlet passage 9 are communicated by the spherical valve seat member 7 from the short passage 10a of the T-shaped valve hole 10 through the other end 10b of the long passage, and the bypass passage 8 and the outlet passage 9 are blocked. The first state is shown. By rotating the valve shaft 11 from the position shown in the drawing to rotate the spherical valve seat member 7 in the clockwise direction by 90 degrees, the bypass passage passes from the other end 10b of the long passage of the T-shaped valve hole 10 through the short passage 10a. 8 and the outlet passage 9 are communicated, and the valve chamber 3 and the outlet passage 9 are communicated from one end 10c of the long passage of the T-shaped valve hole 10 through the short passage 10a. Further, by rotating the valve shaft 11 from the illustrated position to rotate the spherical valve seat member 7 by 180 degrees, the bypass passage 8 and the outlet are connected through the short passage 10a of the T-shaped valve hole 10 through one end 10c of the long passage. The passage 9 is in communication, and the valve chamber 3 and the outlet passage 9 are blocked.

上記の熱応動式スチームトラップの動作は次の通りである。通常は図示の第１状態に球形弁座部材７を回転させて使用する。始動時、弁室３内は低温であり、膨脹収縮媒体１８は収縮し、ダイヤフラム部材１７が上方に変位し、弁部材１９が球形弁座部材７から離座してＴ字状の弁孔１０の短通路１０ａを開口している。これにより、入口４から入口通路６を通して弁室３に流入する低温の復水や空気をＴ字状の弁孔１０の短通路１０ａから長通路の他端１０ｂを通して出口通路９から出口５へ排出する。低温流体の排出によって入口４から流入する流体温度が上昇し、弁室３内が所定温度以上になると、膨脹収縮媒体１８は膨脹し、ダイヤフラム部材１７が下方に変位し、弁部材１９が球形弁座部材７に着座してＴ字状の弁孔１０の短通路１０ａを閉止する。これにより蒸気の漏出を防止する。放熱によって弁室３内が所定温度以下になると、膨脹収縮媒体１８は収縮し、ダイヤフラム部材１７が上方に変位し、弁部材１９が球形弁座部材７から離座してＴ字状の弁孔１０の短通路１０ａを開口する。 The operation of the above-mentioned heat-responsive steam trap is as follows. Usually, the spherical valve seat member 7 is rotated and used in the first state shown in the figure. At the time of starting, the inside of the valve chamber 3 is at a low temperature, the expansion / contraction medium 18 contracts, the diaphragm member 17 is displaced upward, the valve member 19 is separated from the spherical valve seat member 7, and the T-shaped valve hole 10. The short passage 10a is opened. As a result, low-temperature condensate or air flowing into the valve chamber 3 from the inlet 4 through the inlet passage 6 is discharged from the short passage 10a of the T-shaped valve hole 10 to the outlet 5 through the other end 10b of the long passage. To do. When the temperature of the fluid flowing from the inlet 4 rises due to the discharge of the low-temperature fluid and the inside of the valve chamber 3 reaches a predetermined temperature or more, the expansion / contraction medium 18 expands, the diaphragm member 17 is displaced downward, and the valve member 19 becomes a spherical valve. The short passage 10 a of the T-shaped valve hole 10 is closed by sitting on the seat member 7. This prevents steam leakage. When the inside of the valve chamber 3 falls below a predetermined temperature due to heat radiation, the expansion / contraction medium 18 contracts, the diaphragm member 17 is displaced upward, and the valve member 19 is separated from the spherical valve seat member 7 to form a T-shaped valve hole. Ten short passages 10a are opened.

Ｔ字状の弁孔１０の短通路１０ａの内面に付着した異物を洗浄する場合は、図示の第１状態から弁軸１１を回転操作して球形弁座部材７を９０度時計回り方向へ回転させることにより、長通路の他端１０ｂから短通路１０ａを通してバイパス通路８と出口通路９を連通し、長通路の一端１０ｃから短通路１０ａを通して弁室３と出口通路９を連通した第２状態とする。これにより、入口４側の高圧蒸気が高速でバイパス通路８を通して長通路の他端１０ｂから短通路１０ａを流下して短通路１０ａを逆洗するので、Ｔ字状の弁孔１０の短通路１０ａの内面に付着した異物を簡単に確実に洗浄できる。また、膨脹収縮媒体１８の変質によりＴ字状の弁孔１０の短通路１０ａを開口できなくなった場合は、図示の第１状態から弁軸１１を回転操作して球形弁座部材７を１８０度回転させることにより、短通路１０ａから長通路の一端１０ｃを通してバイパス通路８と出口通路９を連通し、弁室３と出口通路９を遮断した第３状態とする。これにより、入口４の復水や空気をバイパス通路８、短通路１０ａ、適宜径のオリフィスに形成したオリフィス通路である長通路の一端１０ｃ、を通して出口通路９から出口５へ排出し、復水を排出し蒸気を漏出することのないスチームトラップ機能を維持できる。 When cleaning the foreign matter adhering to the inner surface of the short passage 10a of the T-shaped valve hole 10, the spherical valve seat member 7 is rotated 90 degrees clockwise by rotating the valve shaft 11 from the first state shown in the figure. By doing so, the bypass passage 8 and the outlet passage 9 are communicated from the other end 10b of the long passage through the short passage 10a, and the valve chamber 3 and the outlet passage 9 are communicated from the one end 10c of the long passage through the short passage 10a. To do. As a result, the high-pressure steam on the inlet 4 side flows through the short passage 10a from the other end 10b of the long passage through the bypass passage 8 at high speed and backwashes the short passage 10a, so the short passage 10a of the T-shaped valve hole 10 Foreign matter adhering to the inner surface of the can be easily and reliably cleaned. Further, when the short passage 10a of the T-shaped valve hole 10 cannot be opened due to the alteration of the expansion / contraction medium 18, the valve shaft 11 is rotated from the illustrated first state so that the spherical valve seat member 7 is rotated 180 degrees. By rotating, the bypass passage 8 and the outlet passage 9 are communicated from the short passage 10a through one end 10c of the long passage, and the valve chamber 3 and the outlet passage 9 are blocked. As a result, the condensate and air at the inlet 4 are discharged from the outlet passage 9 to the outlet 5 through the bypass passage 8, the short passage 10 a, and one end 10 c of the long passage which is an orifice passage formed in an orifice having an appropriate diameter. The steam trap function can be maintained without discharging and leaking steam.

本発明は、温度制御機素を用いて弁孔を開閉するあらゆる種類の熱応動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 all types of thermally responsive steam traps that open and close valve holes using temperature control elements.

１本体
２蓋
３弁室
４入口
５出口
６入口通路
７球形弁座部材
８バイパス通路
９出口通路
１０Ｔ字状の弁孔
１０ａＴ字状の弁孔の短通路
１０ｂＴ字状の弁孔の長通路の他端
１０ｃＴ字状の弁孔の長通路の一端
１１弁軸
１２温度制御機素
１４上壁部材
１７ダイヤフラム部材
１８膨脹収縮媒体
１９弁部材
２０下壁部材 1 Body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 6 Inlet passage 7 Spherical valve seat member 8 Bypass passage 9 Outlet passage 10 T-shaped valve hole 10a T-shaped valve hole short passage 10b T-shaped valve hole The other end of the long passage 10c One end of the long passage of the T-shaped valve hole 11 Valve shaft 12 Temperature control element 14 Upper wall member 17 Diaphragm member 18 Expansion / contraction medium 19 Valve member 20 Lower wall member

Claims

ケーシングで入口と弁室と出口を形成し、弁室を出口側に連通する弁孔を有する弁座部材を弁室と出口との間に配置し、壁部材とダイヤフラム部材と両部材の間に密封した膨脹収縮媒体とダイヤフラム部材の弁座部材側に連結した弁部材とから成る温度制御機素を弁室内に配置したものにおいて、弁座部材を球形に形成すると共に弁孔をＴ字状に形成しＴ字状の弁孔の長通路の一端をオリフィス通路に形成した球形弁座部材をケーシングに回転操作可能に配置し、入口と球形弁座部材を連通するバイパス通路をケーシングに形成し、球形弁座部材を外部から回転操作することによりＴ字状の弁孔の短通路から長通路の他端を通して弁室と出口側とを連通し温度制御機素によりＴ字状の弁孔の短通路を開閉する第１状態とＴ字状の弁孔の長通路の他端から第１状態時に温度制御機素により開閉されていた短通路を通してバイパス通路と出口側とを連通する第２状態とＴ字状の弁孔の第１状態時に温度制御機素により開閉されていた短通路から長通路の一端のオリフィス通路を通してバイパス通路と出口側とを連通する第３状態に切り替えることができることを特徴とする熱応動式スチームトラップ。 An inlet, a valve chamber and an outlet are formed in the casing, a valve seat member having a valve hole communicating with the valve chamber on the outlet side is disposed between the valve chamber and the outlet, and the wall member, the diaphragm member, and both members A temperature control element comprising a sealed expansion / contraction medium and a valve member connected to the valve seat side of the diaphragm member is disposed in the valve chamber. The valve seat member is formed in a spherical shape and the valve hole is formed in a T shape. A spherical valve seat member formed at one end of the long passage of the T-shaped valve hole in the orifice passage is rotatably arranged in the casing, and a bypass passage communicating the inlet and the spherical valve seat member is formed in the casing; short of T-shaped short path from the communication with the temperature controller element and a valve chamber and the outlet through the other end of the long path of the T-shaped valve hole of the valve hole by rotating the spherical valve seat member from the outside long passage of the first state and the T-shaped valve hole for opening and closing a passage It is opened and closed by the temperature controller element from the other end during the first state of the second state and the T-shaped valve hole that communicates the bypass passage and the outlet side through a short path which has been opened and closed by the temperature controller element during the first state A thermally responsive steam trap, characterized in that the short passage can be switched to a third state in which the bypass passage and the outlet side communicate with each other through the orifice passage at one end of the long passage.