公开(公告)号：US06619618B2

公开(公告)日：2003-09-16

申请号：US09929485

申请日：2001-08-15

申请人： Tsuneo Ishigaki ,  Seiichi Furutate ,  Kenji Waragai

发明人： Tsuneo Ishigaki ,  Seiichi Furutate ,  Kenji Waragai

IPC分类号： F16K2500

CPC分类号： F16K3/0218 ,  F16K51/02

摘要： In a gate valve having a rectangular gate, generation of flection at opposite end portions due to bending moment applied to the gate is suppressed easily. For this purpose, in the gate valve in which a central portion of a longer side of the rectangular gate is mounted to a tip end of a shaft operated by driving of a cylinder device and the gate is pressed against a valve seat provided around a rectangular valve opening by tilting the shaft after the gate is moved to a position facing the valve opening by movement of the shaft by driving of the cylinder device, the gate is formed to have an uneven wall thickness including a large thickness in a vicinity of a fulcrum portion connected to the shaft and a small thickness on each of opposite end portion sides.

摘要翻译： 在具有矩形栅极的闸阀中，由于施加到闸门的弯矩而在相对端部产生弯曲被容易地抑制。 为此，在通过驱动缸装置而操作的轴的末端安装矩形闸门的较长侧的中心部分的闸阀中，并且将门压靠设置在矩形侧壁上的阀座 在通过缸体装置的驱动通过轴的移动将门移动到与阀开口相对的位置之后，通过倾斜轴来开启阀门，门形成为在支点附近具有包括大厚度的不均匀的壁厚 连接到轴的部分和在相对端部侧的每一个上具有小的厚度。

公开(公告)号：US06581635B2

公开(公告)日：2003-06-24

申请号：US09797594

申请日：2001-03-05

申请人： Seiichi Furutate ,  Masao Kajitani

发明人： Seiichi Furutate ,  Masao Kajitani

IPC分类号： F16K3700

CPC分类号： F16K31/1221 ,  F16K31/1225 ,  F16K39/024 ,  F16K51/02 ,  Y10T137/8275 ,  Y10T137/86944 ,  Y10T137/87121

摘要： A main valve mechanism for opening and closing a main flow path between a first port and a second port has a main valve body, a large-diameter first piston for opening the main valve body, a main pressure operating chamber for driving the first piston, and first spring means for closing the first piston. An auxiliary valve mechanism for opening and closing an auxiliary flow path has an auxiliary valve body, a small-diameter second piston for opening the auxiliary valve body, an auxiliary pressure operating chamber for driving the second piston, and second spring means for closing the second piston. The main pressure operating chamber and the auxiliary pressure operating chamber are connected to each other through a connecting hole. There are such relationships between piston diameters of both the pistons and repulsing forces of both the spring means that the second piston is actuated by lower fluid pressure than the first piston.

摘要翻译： 用于打开和关闭第一端口和第二端口之间的主流路的主阀机构具有主阀体，用于打开主阀体的大直径第一活塞，用于驱动第一活塞的主压力操作室， 以及用于关闭第一活塞的第一弹簧装置。 用于打开和关闭辅助流路的辅助阀机构具有辅助阀体，用于打开辅助阀体的小直径第二活塞，用于驱动第二活塞的辅助压力操作室，以及用于关闭第二活塞的第二弹簧装置 活塞。 主压力操作室和辅助压力操作室通过连接孔相互连接。 两个活塞的活塞直径和两个弹簧的排斥力之间存在这样的关系，即第二活塞由比第一活塞低的流体压力致动。