The main content of this paper is devoted to design a high-rise building automatic constant pressure water spray fire-control system. The system has changed from previous high-water tanks and pumps for water supply mode, get rid of the shortcomings of the water supply instability, is a safe and reliable, fast and stability, energy saving, convenient maintenance and management of water supply control systems.
This paper designed control system can control two regulators pump and two main fire pumps. Regulators from the pump-frequency power supply, fire control network to the pressure tank and water supply, the pressure tank 30 seconds after all certificates have the fire water, fire pumps from the main power inverter constant pressure water supply. Regulators booster pump water supplement a major role in the leaking pipeline system so that the Fire Services Network automatically when water pressure dropped to work. The main fire pump in case of fire and put into operation, the pipeline network to fire the pressure transmitter signal pressure as feedback signals, and PID feedback signal conditioning instrument settings comparison of output, regulating water pressure on fire to keep constant pressure in the state .
PLC to design the system for the control of the core to achieve a fully automated control functions. Two regulators of a pump with a rotating work by the turn of operation, a failure to automatically switch. Two fire pump is also a one-up, both the frequency and frequency operation, failure of backup pump automatically put into operation. When a fire pump frequency operation after the hydraulic pressure is still lower than the set, the backup pump will automatically enter the workforce joint water supply. The system also set up a manual and automatic features, and fire control center networking, maintenance and management is very convenient.
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