PROBLEM TO BE SOLVED: To provide a rotary valve suitable for, in particular, a quick exhaust valve for an automatic door opening/closing device of a railway vehicle, capable of protecting a valve sealing performance by removing foreign matters generating inside or intruding from the external, switching a flow channel while improving operability by securing high sealability and low torque property in opening/closing a valve element, and quickly exhausting pressure air in a short exhaust time through an exhaust hole of a large diameter while entirely miniaturized and reducing the number of components.SOLUTION: Inflow/outflow ports 10, 11, and an exhaust port 12 are formed on a valve element accommodation portion 16 having a spherical portion 15 formed on a part of an inner periphery of a body 2, a valve element 3 having a spherical face part 28 is rotatably mounted in the valve element accommodation portion 16, a plurality of through-openings 30-32 communicated with the inflow/outflow ports or the exhaust port, and a mounting groove 33 are formed on the valve element 3, one of the inflow/outflow ports and the exhaust port are sealed and closed by the seal member 5 mounted on the mounting groove 33, and a wiper ring 8 for cleaning sealed faces 10a-12a of the body 2 in synchronization with a rotating operation of the valve element 3, is disposed on the seal member 5.SELECTED DRAWING: Figure 2
【課題】内部で発生したり外部から浸入しようとする異物を除去してバルブの封止性能を保護し、弁体開閉時には高シール性と低トルク性とを確保して操作性を向上しながら流路を切換え可能に設け、全体のコンパクト化や部品点数の削減を図りつつ、大口径の排気孔を介して短い排気時間で圧力空気を急速排気でき、特に鉄道車両の自動扉開閉装置用の急速排気弁に適した回転弁を提供する。【解決手段】ボデー2内周の一部に形成した球面部15を有する弁体収納部16に流出入口10、11、排気口12を形成し、弁体収納部16に球状面部分28を有する弁体3を回転自在に装着し、弁体3に、流出入口又は排気口と連通する複数の貫通口30〜32、装着溝33を形成し、装着溝33に装着したシール部材5で何れか1つの流出入口又は排気口を密封閉止し、弁体3の回転操作と同期してボデー2の封止面10a〜12aを清浄化するワイパーリング8をシール部材5に設けた。【選択図】図2
ROTARY VALVE AND QUICK EXHAUST VALVE FOR RAILWAY VEHICLE USING THE SAME
回転弁とこれを用いた鉄道車両用急速排気弁
02.02.2017
Patent
Elektronische Ressource
Japanisch
ROTARY VALVE AND QUICK EXHAUST VALVE FOR RAILWAY VEHICLE USING THE SAME
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