JP4166514B2

JP4166514B2 - Float type drain trap

Info

Publication number: JP4166514B2
Application number: JP2002173943A
Authority: JP
Inventors: 剛士福田
Original assignee: Tlv Co Ltd
Current assignee: Tlv Co Ltd
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2008-10-15
Anticipated expiration: 2022-06-14
Also published as: JP2004019747A

Description

【０００１】
【発明の属する技術分野】
本発明は、弁室内に収容したフロートの浮上降下によって弁室と出口を連通する弁口を開閉し、蒸気や圧縮空気及びガス配管系に発生する復水や凝縮水等のドレンを自動的に排出するフロート式ドレントラップに関し、特に、開口面積の大きな弁口を開閉できるフロート式ドレントラップに関する。
【０００２】
【従来の技術】
開口面積の大きな弁口を開閉できる従来のフロート式ドレントラップは、例えば特開昭５３−１３２７号公報に示されている。当該公報から理解されるように、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上下同一軸上の上弁口及び下弁口を設け、上弁口を開閉する上弁体を上弁口の上方の弁室内に配置し、下弁口を開閉する下弁体を下弁口の上方の出口側に配置し、下弁体の上面に下弁体上案内棒を形成し、上弁体と下弁体上案内棒をねじ結合し、上弁体に連結して弁室内にフロートを配したものであり、上弁体と下弁体に弁室と出口の流体圧力を逆向きに作用させることによって、上弁口及び下弁口からなる開口面積の大きな弁口を開閉できるものである。
【０００３】
【発明が解決しようとする課題】
上記従来のフロート式ドレントラップにおいては、上弁体と下弁体上案内棒の結合部を高精度に加工しても、上弁体と下弁体上案内棒を結合するときのねじ込み量やねじ込み角度のずれによって、上弁体と下弁体が同時に上弁口と下弁口に着座できなくなる問題点があった。
【０００４】
従って、本発明の技術的課題は、上弁体と下弁体が同時に上弁口と下弁口に着座できるフロート式ドレントラップを提供することである。
【０００５】
【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発明の技術的手段は、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上下同一軸上の上弁口及び下弁口を設け、上弁口を開閉する上弁体を上弁口の上方の弁室内に配置し、下弁口を開閉する下弁体を下弁口の上方の出口側に配置し、下弁体の上面に下弁体上案内棒を形成し、上弁体に連結して弁室内にフロートを配し、上弁体の下端面と下弁体上案内棒の上端面を直接当接させたことを特徴とするフロート式ドレントラップにある。
【０００６】
【発明の実施の形態】
本発明のフロート式ドレントラップは、上弁体と下弁体上案内棒をねじ結合せず、上弁体の下端面と下弁体上案内棒の上端面を直接当接させたものであるので、上弁体と下弁体が同時に上弁口と下弁口に着座できる。
【０００７】
【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（図１参照）。本体１に蓋体２をボルト等の締結手段（図示せず）で固着し、内部に弁室３を有するケーシングを形成する。本体１の上部に入口４を形成し、隔壁５で仕切られた流入通路６を通して弁室３に連通せしめる。隔壁５の上端には通気孔７を開ける。
【０００８】
本体１に弁座部材口８を開け、弁室３に突出する弁座部材９をボルト等の締結手段（図示せず）で固着する。弁座部材９にその内部に形成した流出通路１０を通して連通する出口１１を形成する。弁座部材９の上壁に上弁口１２を開け、下壁に下弁口１３を開ける。弁室３は上弁口１２と下弁口１３から流出通路１０を通して出口１１に連通する。下弁口１３は上弁口１２の下方で上弁口１２と同一軸上に形成する。また、下弁口１３の開口面積は上弁口１２の開口面積と同一あるいは僅かに小さく形成する。
【０００９】
上弁口１２の上方の弁室３側に上弁口１２を開閉する上弁体２２を配置し、下弁口１３の上方の出口１１側に下弁口１３を開閉する下弁体１５を配置し、上弁体２２の上方の弁室３側にフロート１４を配置する。フロート１４の下面に形成した下部突起に上弁体２２の上面に一体に形成した上弁体案内棒２３の上端をねじ結合してフロート１４と上弁体２２を連結する。下弁体１５の上面に一体に下弁体上案内棒１６を形成し、下面に一体に上案内棒１６と同一軸上に下弁体下案内棒１７を形成する。上弁体２２が上弁口１２に着座し下弁体１５が下弁口１３に着座した位置において、下弁体上案内棒１６の上端面は上弁体２２の下端面に直接当接する。上弁体案内棒２３は弁座部材９に固着した上弁体支持部材２４で上下方向に摺動案内し、下弁体上案内棒１６は弁座部材９に固着した上支持部材１８で上下方向に摺動案内し、下弁体下案内棒１７は弁座部材９に固着した下支持部材１９で上下方向に摺動案内する。フロート１４は蓋体２と弁座部材９の間に固着した多数の連通孔を有する支持筒２０で上下方向に摺動案内する。
【００１０】
上記実施例の作用は下記の通りである。
図示の状態は、入口４から流入通路６を通して弁室３に流入するドレンが少なく、フロート１４が降下して上弁体２２が上弁口１２に着座すると共に、フロート１４の降下に伴って下弁体１５が押し下げられて下弁口１３に着座した閉弁状態を示している。入口４から流入通路６を通して弁室３に流入するドレンにより弁室３の液面が上昇すると、液面上昇に伴ってフロート１４が浮上して上弁体２２が上弁口１２から離座すると共に、フロート１４の浮上に伴って下弁体１５が弁室３の流体圧力により持ち上げられて下弁口１３から離座し、上弁口１２と下弁口１３を開けて弁室３のドレンを流出通路１０から出口１１に排出する。上弁体２２と下弁体１５に弁室３と出口１１の流体圧力を逆向きに作用させることによって、上弁口１２及び下弁口１３からなる開口面積の大きな弁口を開閉できる。
【００１１】
ドレンの排出により弁室３の液面が低下すると、液面低下に伴ってフロート１４が降下して上弁体２２が上弁口１２に着座すると共に、フロート１４の降下に伴って下弁体１５が押し下げられて下弁口１３に着座した閉弁状態に戻る。
【００１２】
【発明の効果】
本発明は下記の特有の効果を生じる。
上記のように本発明によるフロート式ドレントラップは、上弁体と下弁体上案内棒をねじ結合せず、上弁体の下端面と下弁体上案内棒の上端面を直接当接させたものであるので、上弁体と下弁体が同時に上弁口と下弁口に着座でき、蒸気や圧縮空気やガスを漏洩することがないという優れた効果を生じる。
【図面の簡単な説明】
【図１】本発明の実施例のフロート式ドレントラップの断面図である。
【符号の説明】
１本体
２蓋体
３弁室
４入口
９弁座部材
１１出口
１２上弁口
１３下弁口
１４フロート
１５下弁体
２２上弁体[0001]
BACKGROUND OF THE INVENTION
The present invention automatically opens and closes the valve port that connects the valve chamber and the outlet by the rising and lowering of the float accommodated in the valve chamber, and automatically drains condensate and condensed water generated in steam, compressed air, and gas piping systems. More particularly, the present invention relates to a float drain trap that can open and close a valve opening having a large opening area.
[0002]
[Prior art]
A conventional float drain trap capable of opening and closing a valve opening having a large opening area is disclosed in, for example, Japanese Patent Laid-Open No. 53-1327. As understood from the publication, the casing forms an inlet, a valve chamber, and an outlet. An upper valve port and a lower valve port on the same upper and lower axes that communicate the valve chamber and the outlet are provided to open and close the upper valve port. The valve body is placed in the valve chamber above the upper valve port, the lower valve body that opens and closes the lower valve port is placed on the outlet side above the lower valve port, and the lower valve body upper guide rod is placed on the upper surface of the lower valve body. The upper valve body and the lower valve body upper guide rod are screwed together, connected to the upper valve body, and a float is arranged in the valve chamber. By causing the pressure to act in the opposite direction, a valve opening having a large opening area composed of an upper valve opening and a lower valve opening can be opened and closed.
[0003]
[Problems to be solved by the invention]
In the above-described conventional float drain trap, even by processing the binding portion of the upper valve body and the lower valve body on the guide rod with high precision, Ya screwing amount when coupling the upper valve body and the lower valve body on the guide rods There is a problem that the upper valve body and the lower valve body cannot be seated on the upper valve port and the lower valve port at the same time due to the deviation of the screwing angle.
[0004]
Therefore, the technical problem of the present invention is to provide a float drain trap in which an upper valve body and a lower valve body can be seated simultaneously on an upper valve port and a lower valve port.
[0005]
[Means for Solving the Problems]
The technical means of the present invention devised to solve the above technical problem includes an upper valve port and a lower valve on the same upper and lower axes that form an inlet, a valve chamber, and an outlet in a casing, and communicate with the valve chamber and the outlet. the mouth is provided, the upper valve body for opening and closing the upper valve port disposed above the valve chamber of the upper valve port to place the lower valve body for opening and closing the lower valve port above the outlet side of the lower valve port, the lower valve A lower valve body upper guide rod is formed on the upper surface of the body, connected to the upper valve body, a float is arranged in the valve chamber, and the lower end surface of the upper valve body and the upper end surface of the lower valve body upper guide rod are brought into direct contact with each other. It is in the float type drain trap characterized by that.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the float drain trap of the present invention, the upper valve body and the lower valve body upper guide rod are not screwed together, but the lower end surface of the upper valve body and the upper end surface of the lower valve body upper guide rod are brought into direct contact with each other. Therefore, the upper valve body and the lower valve body can be seated on the upper valve port and the lower valve port at the same time.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid body 2 is fixed to the main body 1 by fastening means (not shown) such as bolts to form a casing having a valve chamber 3 therein. An inlet 4 is formed in the upper part of the main body 1 and communicates with the valve chamber 3 through an inflow passage 6 partitioned by a partition wall 5. A vent hole 7 is opened at the upper end of the partition wall 5.
[0008]
The valve seat member port 8 is opened in the main body 1, and the valve seat member 9 protruding into the valve chamber 3 is fixed by fastening means (not shown) such as a bolt. An outlet 11 communicating with the valve seat member 9 through an outflow passage 10 formed therein is formed. An upper valve port 12 is opened on the upper wall of the valve seat member 9, and a lower valve port 13 is opened on the lower wall. The valve chamber 3 communicates from the upper valve port 12 and the lower valve port 13 to the outlet 11 through the outflow passage 10. The lower valve port 13 is formed below the upper valve port 12 and on the same axis as the upper valve port 12. Further, the opening area of the lower valve port 13 is formed to be the same as or slightly smaller than the opening area of the upper valve port 12.
[0009]
An upper valve body 22 that opens and closes the upper valve port 12 is disposed on the valve chamber 3 side above the upper valve port 12, and a lower valve body 15 that opens and closes the lower valve port 13 on the outlet 11 side above the lower valve port 13. The float 14 is disposed on the valve chamber 3 side above the upper valve body 22. The float 14 and the upper valve body 22 are connected by screwing the upper end of the upper valve body guide rod 23 integrally formed on the upper surface of the upper valve body 22 to the lower protrusion formed on the lower surface of the float 14. A lower valve body upper guide rod 16 is integrally formed on the upper surface of the lower valve body 15, and a lower valve body lower guide rod 17 is formed on the same axis as the upper guide rod 16 on the lower surface. At the position where the upper valve body 22 is seated on the upper valve port 12 and the lower valve body 15 is seated on the lower valve port 13, the upper end surface of the lower valve body upper guide rod 16 directly contacts the lower end surface of the upper valve body 22. The upper valve body guide rod 23 is slidably guided in the vertical direction by an upper valve body support member 24 fixed to the valve seat member 9, and the lower valve body upper guide rod 16 is moved up and down by an upper support member 18 fixed to the valve seat member 9. The lower valve body lower guide rod 17 is slidably guided in the vertical direction by the lower support member 19 fixed to the valve seat member 9. The float 14 is slidably guided in a vertical direction by a support cylinder 20 having a large number of communication holes fixed between the lid 2 and the valve seat member 9.
[0010]
The operation of the above embodiment is as follows.
In the state shown in the figure, there is little drain flowing into the valve chamber 3 from the inlet 4 through the inflow passage 6, the float 14 descends and the upper valve body 22 sits on the upper valve port 12, and the lower as the float 14 descends. A valve closing state in which the valve body 15 is pushed down and seated on the lower valve port 13 is shown. When the liquid level in the valve chamber 3 rises due to the drain that flows into the valve chamber 3 from the inlet 4 through the inflow passage 6, the float 14 rises as the liquid level rises, and the upper valve body 22 moves away from the upper valve port 12. At the same time, as the float 14 floats, the lower valve body 15 is lifted by the fluid pressure in the valve chamber 3 and is separated from the lower valve port 13, and the upper valve port 12 and the lower valve port 13 are opened to drain the valve chamber 3. From the outflow passage 10 to the outlet 11. By causing the fluid pressures of the valve chamber 3 and the outlet 11 to act on the upper valve body 22 and the lower valve body 15 in opposite directions, the valve opening having a large opening area including the upper valve opening 12 and the lower valve opening 13 can be opened and closed.
[0011]
When the liquid level in the valve chamber 3 decreases due to drainage, the float 14 descends as the liquid level decreases and the upper valve body 22 sits on the upper valve port 12, and the lower valve body as the float 14 descends. 15 is pushed down and the valve is returned to the closed state seated on the lower valve port 13.
[0012]
【The invention's effect】
The present invention produces the following specific effects.
Float drain trap according to the invention as described above, the upper valve body and the lower valve body on the guide rods without a screw connection, the upper surface of the lower end surface and the lower valve body on the guide rods of the upper valve body thereby directly abut Therefore, the upper valve body and the lower valve body can be seated on the upper valve port and the lower valve port at the same time, and an excellent effect of preventing leakage of steam, compressed air and gas is produced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a float drain trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 9 Valve seat member 11 Outlet 12 Upper valve port 13 Lower valve port 14 Float 15 Lower valve body 22 Upper valve body

Claims

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上下同一軸上の上弁口及び下弁口を設け、上弁口を開閉する上弁体を上弁口の上方の弁室内に配置し、下弁口を開閉する下弁体を下弁口の上方の出口側に配置し、下弁体の上面に下弁体上案内棒を形成し、上弁体に連結して弁室内にフロートを配し、上弁体の下端面と下弁体上案内棒の上端面を直接当接させたことを特徴とするフロート式ドレントラップ。The casing forms an inlet, a valve chamber, and an outlet. An upper valve port and a lower valve port on the same upper and lower axes that communicate the valve chamber and the outlet are provided, and an upper valve body that opens and closes the upper valve port is located above the upper valve port. The lower valve body, which is placed in the valve chamber and opens and closes the lower valve port, is arranged on the outlet side above the lower valve port, and the lower valve body upper guide rod is formed on the upper surface of the lower valve body and connected to the upper valve body. The float drain trap is characterized in that a float is disposed in the valve chamber, and the lower end surface of the upper valve body and the upper end surface of the lower valve body upper guide rod are brought into direct contact with each other.