Abstract:

The electric circuit and control program for outlet butterfly valve of circulating water pump have the problems that cannot be grasped in real time, and the opening degree and the opening speed of outlet butterfly valve cannot meet the operation requirements for circulating water pump. Combining with the actual operation needs, the electrical circuit of the butterfly valve was optimized and adjusted, and the local indication was added. At the same time, the butterfly valve control program was optimized, and the butterfly valve opening and valve opening control logic were improved, thus the safety, reliability and stability of the electric circuit and control program for outlet butterfly valve was ensured, effectively avoiding the occurrence of major accidents caused by the startup failure of the butterfly valve at the outlet of the circulating water pump and the untimely operation. Through the optimization and adjustment of electrical circuits and control programs, the purpose of guiding the operation in real time can be achieved.

Key words: circulating water pump, butterfly valve, opening degree, programmable logic controller(PLC)