一种水力控制阀恒扬程导阀

Constant-lift guide valve of hydraulic control valve

Abstract

本实用新型公开了一种水力控制阀恒扬程导阀,包括弹簧套体、上阀体以及下阀体;上阀体设有第一连接口,下阀体设有第二、第三、第四连接口;第一连接口与设于上阀体的第一腔体连通,第一腔体的上方依次设有膜片、下托板、上弹簧、上压板和调节螺栓;下托板的下方依次设有上阀芯、下阀芯和下弹簧;上阀体与下阀体固定连接。本实用新型导阀能实现控制水力控制阀的开度,以恒定水力控制阀上游压力的作用。当装有该导阀的水力控制阀安装在水泵出口端时,能适应管网压力(下游)动态变化而自动调节上游压力,以恒定水泵的扬程,从而恒定水泵的流量。同时恒定水泵选型工况点,保证水泵在高效率区工作时又不会令驱动设备发生过载。
The utility model discloses a constant-lift guide valve of a hydraulic control valve, which comprises a spring sleeve body, an upper valve body and a lower valve body. The upper valve body is providedwith a first connection opening; the lower valve body is provides with a second connection opening, a third connection opening and a fourth connection opening; the first connection opening is communicated with a first cavity body which is arranged at the upper valve body; a diaphragm, a lower supporting plate, an upper spring, an upper pressing plate and an adjusting bolt are sequentially arranged above the first cavity body; an upper valve core, a lower valve core and a lower spring are sequentially arranged below the lower supporting plate; and the upper valve body is fixedly connected withthe lower valve body. The guide valve can realize the functions of controlling the opening degree of the hydraulic control valve and leading upstream pressure of the hydraulic control valve to be constant. When the hydraulic control valve with the guide valve is installed at the outlet end of a water pump, the guide valve can adapt to the dynamic changing of pipe network pressure (downstream) toautomatically adjust the upstream pressure, so as to lead lift of the water pump to be constant, thereby leading flow rate of the water pump to be constant. Meanwhile, the guide valve can lead a modelselection working condition point of the water pump to be constant, and make sure the water pump cannot lead overload on driving equipment when working in a high-efficiency zone.

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