The utility model relates to the field of control circuit, in particular to an electric circuit of butterfly valve at the outlet of circulating pump, which comprises a valve opening relay, a valve closing relay, a signal contacting point from PLC, a normal opening contacting point of a valve opening intermediate relay, a normal opening contacting point and an indicator light of a valve closing intermediate relay, and the valve opening relay and a valve closing relay are connected in parallel. Then it is connected in series with the signal contacts from PLC. The normal open contacts of the valve opening intermediate relay and the normal open contacts of the valve closing intermediate relay are connected in parallel with the indicator lamp, and the circuit power supply is 24V alternating current power supply. The utility model has the advantages of adding a 65 degree relay to the butterfly valve of the butterfly valve at the outlet of the butterfly valve by combining with the PLC control program of the butterfly valve at the outlet of the circulating water pump in the circuit, and adding a signal indicator in the electric circuit, so as to facilitate the operator on duty to judge the position of the butterfly valve in the process of opening and closing in time. To avoid damage to the equipment during start-up and shutdown.
【技术实现步骤摘要】
一种循泵出口蝶阀电气回路
本技术涉及控制电路领域,尤其涉及一种循泵出口蝶阀电气回路。
技术介绍
三期循泵出口蝶阀的控制方式有:就地控制和远方控制,就地控制一般在设备检修后调试使用,正常运行时一般是采用远方控制。在正常情况下,程控发出启动循环水泵命令,程序先发出开阀命令,当蝶阀控制柜内PLC接到开阀命令,则蝶阀开阀电磁阀带电,蝶阀打开,当蝶阀开到25度时,开阀25度(或关阀65度)继电器动作发出一个蝶阀开至25度的信号给热工DCS,联锁启动循环水泵,蝶阀继续开阀至全开位置,PLC发出全开到位信号;程控发出停止循环水泵命令,程序先发出关阀命令,当蝶阀控制柜内PLC接到关阀命令,则蝶阀关阀电磁阀带电,蝶阀关至65度(开阀25度)时,开阀25度(或关阀65度)继电器动作会发出一个蝶阀关至65度的信号给热工DCS,联锁停止循环水泵。原有技术存在的缺点:循环水泵出口蝶阀开至25度信号或关至65度信号送没送出去,运行值班员在现场是不知道的,只能通过监控画面才能看得到,这样不利于运行现场值班员及时掌握设备的运行状态。
技术实现思路
为解决上述问题,我们提出了一种循泵出口蝶阀电气回路,该回路通过结合循环水泵出口蝶阀PLC控制程序,在蝶阀PLC输出端新增加一个循环水泵出口蝶阀关阀65度继电器;在电气回路中增加开阀(25°)关阀(65°)的信号指示灯,以利于运行值班员现场及时判断蝶阀在开、关的过程中所处的状态,避免循环水泵在启动、停止过程中造成设备的损坏。为实现上述需求,本技术通过以下技术方案来实现上述目的:一种循泵出口蝶阀电气回路,包括开阀继电器、关阀继电器、来自PLC的信号接点、开 ...
【技术保护点】
1.一种循泵出口蝶阀电气回路,其特征在于:包括开阀继电器、关阀继电器、来自PLC的信号接点、开阀中间继电器的常开接点、关阀中间继电器的常开接点和指示灯;所述开阀继电器和关阀继电器并联后与来自PLC的信号接点相串联,所述开阀中间继电器的常开接点和关阀中间继电器的常开接点并联后与指示灯相串联;电路电源为24V交流电源。
【技术特征摘要】
1.一种循泵出口蝶阀电气回路,其特征在于:包括开阀继电器、关阀继电器、来自PLC的信号接点、开阀中间继电器的常开接点、关阀中间继电器的常开接点和指示灯;所述开阀继电器和关阀继电器并联后与来自PLC的信号接点相串联,所述开阀中间继电器的常开接点和关阀中间继电器的常开接点并联后与指示灯相串联;电路电源为24V交流电源。2.如权利要求1所述的循泵出口蝶阀电气回路,其特征在于:所述开阀继电器为开阀25°中间继电器,所述关阀继电器为关阀65°中间继电器。3.如权利要求1所...
【专利技术属性】
技术研发人员:王志成,申大科,
申请(专利权)人:深圳妈湾电力有限公司,
类型:新型
国别省市:广东,44
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