公开(公告)号：US4696452A

公开(公告)日：1987-09-29

申请号：US834103

申请日：1986-02-24

申请人： Teiji Miyagawa ,  Yoshio Iwamura ,  Masao Hayakawa

发明人： Teiji Miyagawa ,  Yoshio Iwamura ,  Masao Hayakawa

IPC分类号： F16K31/124 ,  F16K31/143

CPC分类号： F16K31/143 ,  F16K31/124

摘要： A trip throttle valve with a manual exerciser and combination of a hydraulic piston and a biasing force bearing sleeve is provided in place of a piston. The piston is not directly connected to a valve stem and the sleeve is threadably engaged with the valve stem so as to cause relative axial movement between the sleeve and the valve stem when the stem is rotated through the manual exerciser. The hydraulic portion of the valve is provided with a by-pass passage so that the piston is made axially movable toward the sleeve under the pressure which occurs when the by-pass passage for the hydraulic liquid is blocked but the piston is arrested at a certain axial position where the by-pass passage is still blocked and the axial movement of the sleeve is restricted against the piston. Blocking of the by-pass passage is arranged to take place after the axial separating distance between the sleeve and the piston reaches a predetermined value so that any inadvertent movement of the valve stem by the engagement of the piston with the sleeve is avoided.

摘要翻译： 提供具有手动锻炼器和组合液压活塞和偏压力轴承套筒的行程节流阀来代替活塞。 活塞不直接连接到阀杆，并且套筒与阀杆螺纹接合，以便当阀杆通过手动锻炼器旋转时，使得套筒和阀杆之间产生相对的轴向运动。 阀的液压部分设置有旁通通道，使得当液压液体的旁通通道被阻塞但活塞在某一特定的位置被停止时，活塞能够在压力下朝向套筒轴向移动 旁路通道仍被阻挡的轴向位置，并且套筒的轴向运动被限制在活塞上。 旁通通道的封闭被布置成在套筒和活塞之间的轴向分离距离达到预定值之后发生，从而避免了通过活塞与套筒接合而导致的阀杆的任何无意的移动。