The invention discloses a relay valve capable of outputting two kinds of pressure, and relates to the technical field of railway vehicle braking systems. The relay valve comprises a valve body, a valve rod assembly, a reset assembly and a piston assembly, wherein the valve body is internally provided with an input cavity, an output cavity, a pre-control cavity, an air source input passage communicated with the input cavity, an air source output passage communicated with the output cavity and a pre-control passage communicated with the pre-control cavity; the piston assembly comprises a pistonrod and a piston base fixedly arranged on the piston rod in a sleeving mode; and the side, which is away from the output cavity, of the piston base is provided with a piston step arranged in an inwards-concave mode, an annular cavity B and an inner ring cavity C which are independently sealed are formed, a switching channel communicated with the inner ring cavity C is formed in the side directionof the inner ring cavity C, and a switching plunger is arranged in the switching channel in a sliding mode. By implementing the technical scheme, the relay valve can output large-flow compressed air with the same pressure as the pre-control pressure; and the purpose of reducing the output pressure can be achieved by converting and outputting large-flow compressed air with the pressure lower than the pre-control pressure.

    本发明公开了一种可输出两种压力的中继阀,涉及铁道车辆制动系统技术领域;其包括阀体、阀杆组件、复位组件和活塞组件,阀体内具有输入腔、输出腔和预控腔,以及与输入腔连通的风源输入通路、与输出腔连通的风源输出通路和与预控腔连通的预控通路,活塞组件包括活塞杆和固定套设在活塞杆上的活塞座,活塞座远离输出腔一侧具有内凹设置的活塞台阶,并形成有环形腔室B与内环腔室C两个独立密封的腔室,在内环腔室C的侧向设置有与内环腔室C连通的切换通道,在切换通道内可滑动设有转换柱塞;通过实施本技术方案,该中继阀能够输出与预控压力相同的大流量压缩空气;也能够通过转换输出比预控压力低的大流量压缩空气,达到降低输出压力的目的。


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    Title :

    Relay valve capable of outputting two kinds of pressure


    Additional title:

    一种可输出两种压力的中继阀


    Contributors:
    ZHU YU (author) / LIU WENJUN (author) / SHEN YANFEI (author) / LIU YAMEI (author) / HE CAIJIAN (author) / DU XIA (author) / OU DONGFANG (author) / FENG LI'E (author)

    Publication date :

    2020-10-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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