| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust pipe opening/closing device capable of reducing gas leakage even under a high-temperature environment.SOLUTION: An exhaust pipe opening/closing valve device 1 includes: a valve housing 2 that is provided in the middle of an exhaust pipe 10, and in which an inner peripheral hole 2a constituting a part of the exhaust pipe 10 is formed; a valve 3 that is supported so as to open/close the inner peripheral hole 2a of the valve housing 2; an actuator 5 that rotates the valve 3; a bracket 4 in which an open hole 41 through which a rotational shaft member 32 penetrates is formed, and that supports the valve housing 2 and the actuator 5; and a cover that is installed at the end part of the rotational shaft member 32. The valve 3 has the rotational shaft member 32 rotatably supported to the rotational shaft hole 2b through the bush 21, and a valve body 31 fixed to the rotational shaft member 32 and opening/closing the inner peripheral hole 2a. When the valve is closed, the cover and the rotational shaft member are thrust by gas pressure, the cover and the bracket 4 contact with each other, and a space on the side of the bush 21 with respect to the cover is sealed.SELECTED DRAWING: Figure 1 |
