VALVE DEVICE

• Main Author: MURAOKA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2018
• 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

PROBLEM TO BE SOLVED: To provide a valve device capable of suppressing degradation of sealing performance while suppressing generation of torque by a fluid pressure.SOLUTION: A valve device includes a valve seat 10 formed into the annular shape having a spherical inner peripheral face 11 and forming a circulation passage of a fluid by the inner peripheral face 11, a plate-shaped valve 20 capable of changing an opening of the circulation passage, and a seal ring 30 disposed over an outer periphery of the valve 20, and sealing between the valve 20 and the inner peripheral face of the valve seat 10 in closing the circulation passage by the valve 20. The seal ring 30 has a thermal expansion coefficient different from the valve 20, and relatively movable in a plate thickness direction of the valve 20, to the valve 20 in accompany with thermal deformation.SELECTED DRAWING: Figure 2 【課題】流体の圧力による回転力の発生を抑制しつつ、密閉性の低下を抑制することが可能なバルブ装置を提供する。【解決手段】球面状の内周面１１を有する環状に形成され、当該内周面１１によって流体の流通経路を形成するバルブシート１０と、前記流通経路の開度を変更可能な板状のバルブ２０と、前記バルブ２０の外周に亘って設けられ、前記バルブ２０が前記流通経路を閉塞する際に前記バルブ２０と前記バルブシート１０の内周面との間を密閉するシールリング３０と、を具備し、前記シールリング３０は、前記バルブ２０と異なる熱膨張率を有し、熱による変形に伴って前記バルブ２０に対して前記バルブ２０の板厚方向に相対的に移動可能とした。【選択図】図２