公开(公告)号：US06241212B1

公开(公告)日：2001-06-05

申请号：US09294431

申请日：1999-04-20

申请人： Tarou Takahashi ,  Genroku Sugiyama ,  Tsukasa Toyooka

发明人： Tarou Takahashi ,  Genroku Sugiyama ,  Tsukasa Toyooka

IPC分类号： F16K1720

CPC分类号： F15B20/005 ,  F15B13/01 ,  Y10T137/7727

摘要： A hose rupture control valve unit includes a housing provided with two input/output ports. One input/output port is directly attached to a bottom port of a hydraulic cylinder, and the other input/output port is connected to one of actuator ports of a control valve via an actuator line. Within the housing, there are provided a poppet valve body serving as a main valve, a spool valve body serving as a pilot valve which is operated with a pilot pressure supplied as an external signal from a manual pilot valve, thereby operating the poppet valve body, and a small spool having the function of an overload relief valve. The above construction reduces the number of components arranged in a flow passage through which a hydraulic fluid passes at a large flow rate, and hence a pressure loss. A further reduction in overall size and production cost of the valve unit is achieved.

摘要翻译： 软管断裂控制阀单元包括具有两个输入/输出端口的壳体。 一个输入/输出端口直接连接到液压缸的底部端口，另一个输入/输出端口经由致动器线路连接到控制阀的致动器端口中的一个。 在壳体内设置有作为主阀的提升阀体，作为先导阀的滑阀体，其以从手动先导阀作为外部信号提供的先导压力动作，从而操作提升阀体 以及具有过载溢流阀功能的小型阀芯。 上述结构减少了设置在液压流体以大流量通过的流动通道中的部件的数量，并因此减小了压力损失。 实现阀单元的总体尺寸和生产成本的进一步减小。