水平注水泵系统构成.doc

水平注水泵系统构成The structure of horizontal injection pump水平注水泵系统由水平注水泵、防爆变频器、中央控制器构成。Horizontal injection pump system is composed of horizontal pump, explosion-proof VSD, central controller.以下内容为水平注水泵电气控制有关的部分。The following contents is referred to electrical control of horizontal injection pump system 1、 水平注水泵见下图1. The horizontal injection pump.获取水平注水泵的信号有：电机绕组的温度、吸入口压力、排出口压力、振动、输出口流量信号。The signals achieved from horizontal injection pump are: motor winding temperature, intake pressure, discharge head, vibration, output flow rate signal.上述传感器具备4-20mA的输出信号,该信号提供给防爆变频器、中央控制器完成测量和监控。The aforesaid sensor possesses 4-20mA output signal, which is provided to explosion proof VSD, central controller for implementing measurement and monitoring.2、 水平注水泵电器框图2. The flow chart of electrical equipment in horizontal injection pump system中央控制器功能：它具有读取水平注水泵吸入口压力、排出口压力、振动、轴承温度（需要可以增加）信号；防爆变频器送来的电机温度、电机电流、电机电压、直流母线电压、工作频率、泵流量、给定流量、控制变频器运行或停机、故障、箱体内部凝露、泵流量PID参数等。经中央控制器对电机的温度、吸入口压力、排出口压力等参数的测量，可以主动停止变频器的运行、待正常后可以主动启动变频器。长距离的监控。The function of central controller:It is able to readout horizontal injection pump system intake pressure, discharge head pressure, vibration, bearing temperature signal (can be added if required); motor temperature, motor current, motor voltage, direct-current busbar voltage, work frequency, pump flow rate, rated flow rate from explosion proof VSD, and also control VSD operation or shutdown, failure, internal condensation, pump flow rate PID parameter etc. With help of central controller measuring motor temperature, intake pressure, discharge pressure and the other parameters, it can shutdown VSD actively, and can start up VSD actively after it turns normal. Long-distance control.防爆变频器柜的功能：The function of explosion proof VSD:获取水平注水泵的输出流量信号，经PID调节，使水平泵的输出流量恒定。Acquire output flow-rate signal of horizontal injection pump, and make it constant through PID adjustment.测量电机绕组温度，当超温时停止电机的运行，同时有报警指示灯显示。变频器装置具有监控电机电流、欠压、过压、改变运行频率，当空载时延时停机。当运行频率低于30Hz时自动启动电机风扇。Measure motor winding temperature, shutdown motor when exceeding temperature and indicator light for alarming will also blink. VSD instrument can monitor motor current and change running frequency when over and under voltage load happens, also can time-delay shutdown when there is no load. It can start-up motor fan when running frequency is lower than 30Hz.防爆柜的输入信号：电机绕组温度、泵输出流量、中央控制器的PROFIBUS信号。防爆柜的输出信号：运行/停止、故障、中央控制器的PROFIBUS信号、电机风扇电源。见下图。The input signal of explosion proof controller: motor winding temperature, pump output flow rate, the PROFIBUS signal of central controller.The output signal of explosion proof controller: start/shutdown, failure, PROFIBUS signal of central controller, the power of motor fan.防爆变频器柜内部有进线主开关、进线接触器、输入电抗器、变频器、输出电抗器、防冷凝加热器、柜内照明、电机保护接口等。防爆变频器柜外部有操作面板，可以提供全部变频器的数据。见下图。There is inlet main switch, inlet main contactor, input reactor, VSD, output reactor, anti-condensation heater, internal lighting, motor protecting port and etc. inside of explosion proof VSD.There is control panel outside of the explosion proof VSD which can provide all VSD data. See figure 4.防爆变频器柜的外部有紧急停机、启动、停机按钮；运行、停机、故障LED型的指示灯；报警口。There is emerg