JP4980250B2 - Lever float drain trap - Google Patents

Lever float drain trap Download PDF

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Publication number
JP4980250B2
JP4980250B2 JP2008005296A JP2008005296A JP4980250B2 JP 4980250 B2 JP4980250 B2 JP 4980250B2 JP 2008005296 A JP2008005296 A JP 2008005296A JP 2008005296 A JP2008005296 A JP 2008005296A JP 4980250 B2 JP4980250 B2 JP 4980250B2
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valve
lever
valve chamber
float
fan shape
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JP2008005296A
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JP2009168088A (en
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昌久 広谷
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Tlv Co Ltd
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Tlv Co Ltd
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本発明は、蒸気配管系や圧縮空気配管系やガス配管系に発生するドレンをフロートを用いて自動的に排出するレバーフロート式ドレントラップに関する。   The present invention relates to a lever float drain trap that automatically discharges drain generated in a steam piping system, compressed air piping system, and gas piping system using a float.

従来のレバーフロート式ドレントラップは、ケーシングで入口と弁室と出口を形成し、弁室と出口を連通する弁口を弁室の下部に形成し、弁室内に設けられた支持孔に回転可能に支持された揺動軸にレバーを連結し、弁室内の液位に応じて浮上降下するフロートをレバーに連結すると共に弁口を開閉する弁体をレバーに連結したもので、弁室内の液位に応じて浮上降下するフロートで揺動軸と共にレバーを回転させて弁体で弁口を開閉することによりドレンを自動的に排出するものである。   The conventional lever float drain trap forms an inlet, a valve chamber, and an outlet in a casing, and a valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber and can be rotated in a support hole provided in the valve chamber. The lever is connected to the swing shaft supported by the valve, the float that rises and falls according to the liquid level in the valve chamber is connected to the lever, and the valve body that opens and closes the valve port is connected to the lever. Drain is automatically discharged by rotating the lever together with the swing shaft with a float that rises and falls according to the position, and opening and closing the valve port with the valve body.

上記従来のレバーフロート式ドレントラップにおいては、配管系でウォータハンマ等が発生して弁室内の圧力や液位が急激に変動したときに、弁体が弁口を全開した位置から更にレバーが開弁方向に回転し、フロートが弁室頂壁に衝突して損傷する問題点があった。
特開２００５−３６９０１ In the above-mentioned conventional lever float drain trap, when a water hammer or the like occurs in the piping system and the pressure or liquid level in the valve chamber fluctuates rapidly, the lever opens further from the position where the valve opening fully opens. There was a problem that the valve rotates in the valve direction and the float collides with the valve chamber top wall and is damaged.
JP-A-2005-36901

解決しようとする課題は、フロートの損傷を防止できるレバーフロート式ドレントラップを提供することである。   The problem to be solved is to provide a lever float drain trap that can prevent float damage.

本発明は、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弁口を弁室の下部に形成し、弁室内に設けられた支持孔に回転可能に支持された揺動軸にレバーを連結し、弁室内の液位に応じて浮上降下するフロートをレバーに連結すると共に弁口を開閉する弁体をレバーに連結したものにおいて、揺動軸を断面扇形に形成すると共に、支持孔を揺動軸の断面扇形よりも中心角の大きな断面扇形に形成し、弁体が弁口を全開した位置から更にレバーが開弁方向に回転したときに揺動軸の断面扇形の半径部が当接するストッパ面を支持孔の断面扇形の半径部に形成したことを特徴とする。   In the present invention, an inlet, a valve chamber, and an outlet are formed by a casing, a valve port that communicates the valve chamber and the outlet is formed in a lower portion of the valve chamber, and the rocker is rotatably supported by a support hole provided in the valve chamber. A lever is connected to the dynamic shaft, a float that rises and falls according to the liquid level in the valve chamber is connected to the lever, and a valve body that opens and closes the valve port is connected to the lever. In addition, the support hole is formed in a cross-sectional fan shape having a larger central angle than the cross-sectional fan shape of the rocking shaft, and the cross-sectional fan shape of the rocking shaft when the lever further rotates in the valve opening direction from the position where the valve body fully opens the valve port. The stopper surface with which the radius portion contacts is formed in the sector-shaped radius portion of the support hole.

本発明は、揺動軸を断面扇形に形成すると共に、支持孔を揺動軸の断面扇形よりも中心角の大きな断面扇形に形成し、弁体が弁口を全開した位置から更にレバーが開弁方向に回転したときに揺動軸の断面扇形の半径部が当接するストッパ面を支持孔の断面扇形の半径部に形成したものであるので、フロートが弁室頂壁に衝突する前に揺動軸の断面扇形の半径部が支持孔の断面扇形の半径部に形成したストッパ面に当接することにより、フロートが弁室頂壁に衝突することを防止でき、フロートが損傷することを防止できるという優れた効果を生じる。   In the present invention, the swing shaft is formed in a sector fan shape, the support hole is formed in a sectional fan shape having a larger central angle than the sectional fan shape of the swing shaft, and the lever is further opened from the position where the valve body fully opens the valve port. Since the stopper surface with which the radial section of the oscillating shaft of the swinging shaft abuts when rotating in the valve direction is formed on the radial section of the sectional hole of the support hole, it swings before the float collides with the top wall of the valve chamber. Since the radius of the cross-sectional sector of the dynamic shaft abuts against the stopper surface formed on the radius of the cross-sectional sector of the support hole, the float can be prevented from colliding with the top wall of the valve chamber, and the float can be prevented from being damaged. This produces an excellent effect.

本発明は、揺動軸を断面扇形に形成すると共に、支持孔を揺動軸の断面扇形よりも中心角の大きな断面扇形に形成し、弁体が弁口を全開した位置から更にレバーが開弁方向に回転したときに揺動軸の断面扇形の半径部が当接するストッパ面を支持孔の断面扇形の半径部に形成したものである。そのため、フロートが弁室頂壁に衝突する前に揺動軸の断面扇形の半径部が支持孔の断面扇形の半径部に形成したストッパ面に当接することにより、フロートが弁室頂壁に衝突することを防止でき、フロートが損傷することを防止できる。   In the present invention, the swing shaft is formed in a sector fan shape, the support hole is formed in a sectional fan shape having a larger central angle than the sectional fan shape of the swing shaft, and the lever is further opened from the position where the valve body fully opens the valve port. A stopper surface with which the sectoral radius of the swing shaft abuts when rotating in the valve direction is formed in the sectoral radius of the support hole. Therefore, before the float collides with the valve chamber top wall, the radius of the sectional fan shape of the swing shaft abuts against the stopper surface formed on the radius of the sectional fan shape of the support hole, so that the float collides with the valve chamber top wall. It is possible to prevent the float from being damaged.

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と図２参照）。本発明のレバーフロート式ドレントラップは、入口１と出口２を有する本体３に蓋体４をボルト５で締結して内部に弁室６を有するケーシングを構成する。弁室６と出口２を連通する第１弁口７及び第２弁口８を有する弁座部材９を弁室６の下部の本体３に図示しないねじにより取り付ける。入口１は弁室６の下部に開口し、出口２は第１弁口７及び第２弁口８を介して弁室６の下部に開口する。   An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). The lever float type drain trap of the present invention constitutes a casing having a valve chamber 6 inside by fastening a lid 4 to a main body 3 having an inlet 1 and an outlet 2 with a bolt 5. A valve seat member 9 having a first valve port 7 and a second valve port 8 communicating with the valve chamber 6 and the outlet 2 is attached to a main body 3 below the valve chamber 6 with a screw (not shown). The inlet 1 opens to the lower part of the valve chamber 6, and the outlet 2 opens to the lower part of the valve chamber 6 through the first valve port 7 and the second valve port 8.

弁座部材９に図示しないねじにより取り付けた支持部材１０の支持孔１１に揺動軸１２を回転可能に支持する。揺動軸１２の回転に伴って回転するように揺動軸１２にレバー１３の右端部を嵌合して連結する。レバー１３の左端に弁室６内の液位に応じて浮上降下する中空球形のフロート１４を連結する。揺動軸１２は断面扇形に形成し、中心角部をフロート１４の中心に向けてレバー１３に連結する。支持孔１１は揺動軸１２の断面扇形よりも中心角が大きく半径が同一の断面扇形に形成する。レバー１３の右端に揺動軸１２と平行な連結軸１５を支持し、連結軸１５に連結棒１６の上部を回転可能に連結する。連結棒１６の下部は弁体１７の弁棒１８の上端部に支持された揺動軸１２と平行な弁軸１９に回転可能に連結する。   The swing shaft 12 is rotatably supported in a support hole 11 of a support member 10 attached to the valve seat member 9 with a screw (not shown). The right end portion of the lever 13 is fitted and connected to the rocking shaft 12 so as to rotate with the rotation of the rocking shaft 12. A hollow spherical float 14 that rises and falls according to the liquid level in the valve chamber 6 is connected to the left end of the lever 13. The swing shaft 12 is formed in a sector shape and is connected to the lever 13 with the central corner portion directed toward the center of the float 14. The support hole 11 is formed in a sectional fan shape having a central angle larger than that of the sectional fan shape of the swing shaft 12 and the same radius. A connecting shaft 15 parallel to the swing shaft 12 is supported on the right end of the lever 13, and the upper portion of the connecting rod 16 is rotatably connected to the connecting shaft 15. The lower portion of the connecting rod 16 is rotatably connected to a valve shaft 19 parallel to the swing shaft 12 supported on the upper end portion of the valve rod 18 of the valve body 17.

弁体１７は第１弁口７を下方の出口２側から開閉する第１弁体２０と、第２弁口８を下方の弁室６側から開閉する第２弁体２１と、第１弁体１８と第２弁体１９を連結する弁棒１８とから構成する。第１弁体２０及び第２弁体２１が第１弁口７及び第２弁口８を閉じる位置からレバー１３が更に閉弁方向に回転したときに揺動軸１２の断面扇形の上半径部が当接する上ストッパ面２２を支持孔１１の断面扇形の上半径部に形成し、第１弁体２０及び第２弁体２１が第１弁口７及び第２弁口８を全開した位置から更にレバー１３が開弁方向に回転したときに揺動軸１２の断面扇形の下半径部が当接する下ストッパ面２３を支持孔１１の断面扇形の下半径部に形成する。   The valve body 17 includes a first valve body 20 that opens and closes the first valve port 7 from the lower outlet 2 side, a second valve body 21 that opens and closes the second valve port 8 from the lower valve chamber 6 side, and a first valve It comprises a valve rod 18 that connects the body 18 and the second valve body 19. When the lever 13 is further rotated in the valve closing direction from the position where the first valve body 20 and the second valve body 21 close the first valve port 7 and the second valve port 8, the upper radius portion of the sector shaft of the swing shaft 12. Is formed at the upper radius part of the fan-shaped cross section of the support hole 11 from the position where the first valve body 20 and the second valve body 21 fully open the first valve port 7 and the second valve port 8. Further, a lower stopper surface 23 with which the lower radius portion of the section fan shape of the swing shaft 12 abuts when the lever 13 rotates in the valve opening direction is formed on the lower radius portion of the support hole 11 in the sector fan shape.

弁室６内の液位が低い場合は、図１に示すようにフロート１４は降下し、第１弁体２０及び第２弁体２１が第１弁口７及び第２弁口８を閉じている。このとき、揺動軸１２の断面扇形の上半径部は支持孔１１の上ストッパ面２２に当接していない。配管系でウォータハンマ等が発生し弁室６内の圧力や液位が急激に変動してレバー１３が更に閉弁方向に回転すると、フロート１４が弁室６の底壁に当接する前に揺動軸１２の断面扇形の上半径部が支持孔１１の断面扇形の上半径部に形成した上ストッパ面２２に当接してフロート１４の損傷を防止する。入口１から流入するドレンによって弁室６内の液位が上昇すると、フロート１４が上動してレバー１３が揺動軸１２を中心に時計回り方向に回転する。このレバー１３の回転により、連結棒１６を介して弁体１７が下動して第１弁体２０及び第２弁体２１が第１弁口７及び第２弁口８を開く。これにより、弁室６のドレンを出口２から排出する。図２に示すように第１弁体２０及び第２弁体２１が第１弁口７及び第２弁口８を全開した位置において、揺動軸１２の断面扇形の下半径部は支持孔１１の断面扇形の下半径部に形成した下ストッパ面２３に当接していない。配管系でウォータハンマ等が発生し弁室６内の圧力や液位が急激に変動してレバー１３が更に開弁方向に回転すると、フロート１４が弁室６の頂壁に当接する前に揺動軸１２の断面扇形の下半径部が支持孔１１の断面扇形の下半径部に形成した下ストッパ面２３に当接してフロート１４の損傷を防止する。   When the liquid level in the valve chamber 6 is low, the float 14 descends as shown in FIG. 1, and the first valve body 20 and the second valve body 21 close the first valve port 7 and the second valve port 8. Yes. At this time, the upper radius portion of the sector shaft of the swing shaft 12 is not in contact with the upper stopper surface 22 of the support hole 11. When a water hammer or the like is generated in the piping system and the pressure or liquid level in the valve chamber 6 changes suddenly and the lever 13 further rotates in the valve closing direction, the float 14 shakes before contacting the bottom wall of the valve chamber 6. The upper radius portion of the sectional fan shape of the moving shaft 12 abuts on the upper stopper surface 22 formed on the upper radius portion of the sectional fan shape of the support hole 11 to prevent the float 14 from being damaged. When the liquid level in the valve chamber 6 rises due to the drain flowing from the inlet 1, the float 14 moves upward and the lever 13 rotates around the swing shaft 12 in the clockwise direction. Due to the rotation of the lever 13, the valve body 17 moves downward via the connecting rod 16, and the first valve body 20 and the second valve body 21 open the first valve port 7 and the second valve port 8. Thereby, the drain of the valve chamber 6 is discharged from the outlet 2. As shown in FIG. 2, when the first valve body 20 and the second valve body 21 fully open the first valve port 7 and the second valve port 8, the lower radius portion of the oscillating shaft 12 has a fan-shaped cross section and the support hole 11. Is not in contact with the lower stopper surface 23 formed in the lower radius part of the cross-sectional fan shape. When a water hammer or the like is generated in the piping system and the pressure or liquid level in the valve chamber 6 changes suddenly and the lever 13 further rotates in the valve opening direction, the float 14 shakes before contacting the top wall of the valve chamber 6. The lower radius part of the sectional fan shape of the moving shaft 12 abuts on the lower stopper surface 23 formed on the lower radius part of the sectional fan shape of the support hole 11 to prevent the float 14 from being damaged.

ドレンの排出により弁室６内の液位が低下すると、フロート１４が下動してレバー１３が揺動軸１２を中心に反時計回り方向に回転する。このレバー１３の回転により、連結棒１６を介して弁体１７が上動して第１弁体１８及び第２弁体１９が第１弁口７及び第２弁口８を閉じる。これにより、気体の漏出を防止する。   When the liquid level in the valve chamber 6 decreases due to the drainage, the float 14 moves downward and the lever 13 rotates counterclockwise around the swing shaft 12. Due to the rotation of the lever 13, the valve body 17 moves upward via the connecting rod 16, and the first valve body 18 and the second valve body 19 close the first valve port 7 and the second valve port 8. This prevents gas leakage.

本発明のレバーフロート式ドレントラップの閉弁時の断面図。Sectional drawing at the time of valve closing of the lever float type drain trap of this invention. 本発明のレバーフロート式ドレントラップの全開弁時の断面図。Sectional drawing at the time of fully opening of the lever float type drain trap of this invention.

符号の説明Explanation of symbols

１ 入口
２ 出口
３ 本体
４ 蓋体
６ 弁室
７ 第１弁口
８ 第２弁口
１０ 支持部材
１１ 支持孔
１２ 揺動軸
１３ レバー
１４ フロート
１７ 弁体
２０ 第１弁体
２１ 第２弁体
２２ 上ストッパ面
２３ 下ストッパ面
DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Cover body 6 Valve chamber 7 1st valve port 8 2nd valve port 10 Support member 11 Support hole 12 Oscillating shaft 13 Lever 14 Float 17 Valve body 20 1st valve body 21 2nd valve body 22 Upper stopper surface 23 Lower stopper surface

Claims (1)

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弁口を弁室の下部に形成し、弁室内に設けられた支持孔に回転可能に支持された揺動軸にレバーを連結し、弁室内の液位に応じて浮上降下するフロートをレバーに連結すると共に弁口を開閉する弁体をレバーに連結したものにおいて、揺動軸を断面扇形に形成すると共に、支持孔を揺動軸の断面扇形よりも中心角の大きな断面扇形に形成し、弁体が弁口を全開した位置から更にレバーが開弁方向に回転したときに揺動軸の断面扇形の半径部が当接するストッパ面を支持孔の断面扇形の半径部に形成したことを特徴とするレバーフロート式ドレントラップ。
The casing forms an inlet, a valve chamber, and an outlet. A valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber. The lever is pivotally supported by a support hole provided in the valve chamber. And a float that rises and falls according to the liquid level in the valve chamber is connected to the lever, and a valve body that opens and closes the valve port is connected to the lever. Is formed in a sectional fan shape having a larger central angle than the sectional fan shape of the swing shaft, and when the lever further rotates in the valve opening direction from the position where the valve body fully opens the valve opening, the radius portion of the sectional fan shape of the swing shaft is A lever float type drain trap characterized in that a stopper surface to be abutted is formed in a radius portion of a sector shape of a support hole.
JP2008005296A 2008-01-15 2008-01-15 Lever float drain trap Expired - Fee Related JP4980250B2 (en)

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JP6027791B2 (en) * 2012-07-02 2016-11-16 株式会社テイエルブイ Float type drain trap
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