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    • 4. 发明申请
    • BLOCK AND BLEED VALVE ASSEMBLY
    • 封闭阀组件
    • WO2009091725A1
    • 2009-07-23
    • PCT/US2009/030835
    • 2009-01-13
    • BLAC, INC.THOMPSON, Duncan, M.
    • THOMPSON, Duncan, M.
    • F15B13/04
    • F16K11/044Y10T137/86879
    • A three-way valve includes a rotatable shaft positioned within a cylindrical, linear bore within a housing. A fluid pressure source is coupled via an input port to an inner end of the bore which includes a valve chamber. An output port coupled to a pressure-operated device is also disposed in the housing and is connected to the valve chamber, as is a drain port. Attached to the shaft's inner end is a first seal, while a second seal is attached to the shaft in closely spaced relation to the first seal. Rotational displacement of the shaft clockwise causes the first seal to seal off the source of fluid pressure from the valve chamber, while allowing for fluid discharge through the drain port. Rotational displacement of the shaft in a second, opposed direction connects the pressure-operated device to the pressure source via valve chamber and isolates valve chamber from drain port.
    • 三通阀包括位于壳体内的圆柱形线性孔内的可旋转轴。 流体压力源经由输入端口连接到包括阀室的孔的内端。 连接到压力操作装置的输出端口也设置在壳体中,并且与排出端口一样连接到阀室。 连接到轴的内端是第一密封件,而第二密封件以与第一密封件紧密间隔的关系附接到轴。 顺时针的轴的旋转位移导致第一密封件从阀室密封流体压力源,同时允许通过排放口流体排出。 轴在第二相对方向上的旋转位移通过阀室将压力操作装置连接到压力源,并将阀室与排出口隔离开。