BALL VALVE

• Main Authors: OMAE HIROYUKI, MIYAWAKI SHOTARO
• Format: Patent
• Language: English; Japanese
• Published: 10.05.2018
• 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 change a contact state of a ball valve element with respect to a ball valve seat.SOLUTION: A ball valve includes: a valve body in which a valve chamber is formed in a flow passage of a fluid; a ball valve seat arranged by surrounding the flow passage along an inner periphery of the valve body; and a ball valve element in which a through-hole is formed, and which opens/closes the flow passage of the fluid by rotating in the valve chamber. In the valve body, a slide groove for supporting the ball valve element rotatably and slidably to the ball valve seat side is formed on an inner wall of the valve body. In the ball valve element, a rotary shaft is formed supported by the slide groove. In the rotary shaft, a cross-sectional shape of the shaft in the vertical direction is formed in an annular shape in which a distance from a shaft center to a shaft surface varies.SELECTED DRAWING: Figure 4A 【課題】ボールバルブシートに対するボール弁体の接触状態を変化させること。【解決手段】実施形態のボールバルブは、流体の流路に弁室が形成された弁本体と、弁本体の内周に沿って流路を囲んで配置されるボールバルブシートと、貫通孔が形成され、弁室内で回転することで、流体の流路を開閉するボール弁体とを備える。弁本体は、ボール弁体を回転自在かつボールバルブシート側に摺動可能に支持する摺動溝が弁本体の内壁に形成される。ボール弁体は、摺動溝によって支持される回転軸が形成される。回転軸は、軸の垂直方向の断面形状が軸中心から軸表面までの距離が異なる環形状で形成される。【選択図】図４Ａ