VALVE DEVICE

• Main Authors: TAKADA YUJI, TAMURA NAOKI, NAKANISHI TOMOHIKO, SHIMIZU KOKI
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

To improve sealability between a valve body and a valve seat when a valve is closed.SOLUTION: A valve device includes: a passage member 10 having a first passage 12; and an electromagnetic valve 20 which has a movable element 70 capable of moving in a predetermined direction and may open or close the first passage 12. The passage member 10 has an annular protruding part which encloses an opening 12a. A valve body part 70a of the movable element 70 has an annular elastic body 72 attached to a valve body base part 74. The annular elastic body 72 has: a first contact surface which contacts with one side surface as seen in a predetermined direction of a flange part of the valve body base part 74; an annular second contact surface which contacts with a step surface, oriented to the other side in the predetermined direction, of a step; and an annular seal surface which may contact with the annular protruding part from one side in the predetermined direction. The seal surface, the second contact surface, the step surface, and the annular protruding part at least partially overlap with each other when viewed in the predetermined direction.SELECTED DRAWING: Figure 1 【課題】弁体と弁座の間の閉弁時の封止性を向上する。【解決手段】第１流路１２を有する流路部材１０と、所定方向に移動可能な可動子７０を有し、第１流路１２を開閉可能な電磁弁２０と、を備える。流路部材１０は、開口部１２ａを囲む環状凸部を有する。可動子７０の弁体部７０ａは、弁体基部７４に取り付けられた環状弾性体７２を有する。環状弾性体７２は、弁体基部７４のフランジ部のうち所定方向の一方側の面に接触する第１接触面と、段差のうち所定方向の他方側を向く段差面に接触する環状の第２接触面と、環状凸部に所定方向の一方側から接触可能な環状のシール面と、を有する。シール面と第２接触面と段差面と環状凸部とは、所定方向に見て、少なくとも一部同士が互いに重なっている。【選択図】図１