A minimum flow control system of centrifugal pump, which belongs to the field of centrifugal pump control, the system includes a flowmeter and orifice plate and electric control valve and a controller, wherein the main pipe is directly connected with the water pump, recirculation pipe and main pipe junction flowmeter, in charge of road in the water flow detection and the detection signal is sent to the controller, electric control valve and throttle orifice plate is arranged in the recirculation conduit, the controller receives the signal; the invention of the mechanical centrifugal pump recirculation valve is improved into a set of control device of electromechanical integration. The stability of the system is obviously improved. The control part of the whole device is integrated on a touch screen electronic instrument, and the production cost is greatly reduced. Single chip microcomputer controlled digital touch panel can realize long-term automatic control operation. The utility model has the advantages of simple installation and use and simple and easy operation.
【技术实现步骤摘要】
【技术保护点】
一种离心泵最小流量控制系统，其特征是该系统包括流量计、节流孔板、电动调节阀和控制器，其中，主管道直接与水泵相连，再循环管道与主管道接点处接流量计，用以检测主管道中的水流量并将检测信号发送给控制器，电动调节阀和节流孔板安装在再循环管道中，控制器接收流量计信号；主管道中水流量随水泵启动而增加，在水泵达到正常运行状态的时候，主管道出水阀门打开；当达到关闭再循环电动调节阀门的设定值的时候，控制器自动关闭再循环电动调节阀门；主管道流量小于设定值时，控制器将控制电动调节阀打开，管道中水形成再循环通路，维持一定的流量。
【技术特征摘要】
【专利技术属性】
技术研发人员：许世伟，孟祥利，武祝保，秦世成，乜树义，
申请(专利权)人：沈阳天成自动化工程有限公司，沈阳海泰泵业有限公司，
类型：发明
国别省市：89[中国|沈阳]
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