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supply pipe network. When the water changes the pipe pressurebelow the I set pressure of the pressure of the municipal pipe
network or network users, pressure transmitter pipel ine pressure feedback to the controller PID frequency conversion control cabinet, adjust the output frequency of inverter through UPC watchdog control ler, and start the water pump control pump speed to maintain a cons tant pressure water supply ;if the tap water can not fully meet the (water or all) requi rements, the central contro l center will be ad justed to control multiple frequency pump start stop and pump speed to the maximum extent to meet users requirement of water supply.
Negative pressure techni que
The non negative pressure water supply system adopts the mi crocomputer frequency conversion techno logy and the effective negative pressure treatment technology to real izethe pressure superposed water supply. Through the vacuumcompensation system and the I fully enclosed struc ture, the
equi pment real izes the direct connection with the water pipe ne twork, and overcomes the adverse influence on the pipe ne twork. The device through the pipe pressure gauge, vacuum and water level signal, and the steady flow compensator in a vacuum suppressor compensator in the test device I for collecting
real-time feedback through the microcomputer control device, special vacuum suppressor and the steady f low compensator, suppression Of negative pressure generated, ensure I that the
equipment does not affect the city network.
The system is directly connected with the municipal water supply network , and the water supplu will not cause negative
p
ressure to the municipal water supply network. When the municipal pipe network pressure drops even without water , the pump unit can still work ,and out of the water until the time variation of the steady flow compensator in the negative (watchdog) or by a simple low level control mode when the water pressure decreases to elctrically contact the set lower limit pressure after the automatic shutdown, automatic starting after the runoff . When the power failure occurs, the water pump unit stops working, and the tap water can enter the use’s pipe network through a through pipe , When calling ,the unit will automatically turn on and resume normal water supply .
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