湖南省大成水务发展有限责任公司
电子无负压供水系统装置工作原理
电子无负压供水装置直接串接在自来水供水管上，在水泵进水端和出水端分别安装压力传感器，采集实时压力变化信号并送入中心控制单元。其虚拟浮堰单元、模糊控制单元、自动跟随单元、压力PID控制单元，经控制中心协调运算控制水泵组自动运行。
电子虚拟浮堰可在进水管道中形成一道虚拟浮堰，其作用与真实浮堰相同，其浮堰高度可通过控制面板灵活设定，实际运行时控制前端进水目标压力始终不低于电子浮堰设定值，这就确保了前端自来水管网周边用户不受负压影响，供水装置只对越过电子浮堰的水量进行在线叠压，充分利用了自来水管网原有压力，最大幅度的节约了电能，当自来水管网因故障产生来水压力及来水量不足时，越过电子浮堰的水量继续被系统加压输出，以保证供水的连续性。当越过浮堰的水量为零时，设备自动停止运转。当自来水管网恢复正常只要有越过浮堰的水量出现，设备会自动运行加压。
由于电子无负压供水装置直接串接在自来水供水管上，省去了传统的水箱，从根本上避免了水与大气接触而形成的二次污染。
电子无负压产品优点
1、 占地面积小。
2、 涉水部件少、面积小，电子传感部件不受水垢杂质影响。
3、 防负压过程可根据来水量同步加压，来多少加多少，只有流量为零时才停机。
4、 有效保护自来水管网压力不受负压影响，且设定调整灵活方便。
5、 管路串联，充分利用了自来水进水压力，设备运行效率高。
6、 设备完全密闭与大气隔绝，确保水质不受污染。
Working principle of electrical water supplying system device without negative pressure
The device is directly connected to the tap water supplying pipes with a concatenation, and pressure sensors will be mounted respectively at the water in-let and out-let ends to collect real time pressure alterative signal and send to the central control unit. Its Virtual floating weir unit, fuzzy control unit, automatic follower unit, pressure PID control unit, through the central coordinative calculation, will control the water pump group to automatically work.
Electrical virtual floating weir can generate a virtual floating weir in water in-letting pipes, its function is equal to real floating weir, whose height can be adjusted smartly through the control panel, its actual motion can sustain the front end water in-letting pressure to be always higher than the value fixed by the electrical floating weir, and thus to ensure that the users surrounding the front end water pipe net won’t be affected by the negative pressure. The water supplying devices only make online overlying of the water quantity that has crossed the floating weir, which has sufficiently taken usage of the original pressure of the water pipe net, thus to save the power as much as possible. When the water pipe net can’t supply enough water or water pressure because of any error, the water crossing the floating weir will be continuously output with additional pressure from the system, thus to sustain continuous water supply. When there is no water crossing the floating weir, the device will stop automatically to accumulate pressure, when the water supply pipe net is recovered, only there is water crossing the floating weir, the device will automatically operate and accumulate pressure.
Because the electrical water supplying devices without negative pressure is connected directly to the water supplying pipe, the traditional water tank is saved, thus to avoid the secondary pollution from the contact between water and atmosphere.
Advantage of electrical products without negative pressure:
1、Small area taken.
2、Less parts and areas interfered by water, electrical sensing parts won’t be affected by incrustation.
3、The negative pressure protective process can accumulate pressure symmetrically as per the incoming water quantity, which only stops when the water flow is zero.
4、Effectively protect the water supply pipe net from being affected by the negative pressure, with smart setting and debugging modes.
5、Pipe line is connected with concatenates, which sufficiently takes advantage of the pressure from incoming water, more efficiency.
6、Device is totally sealed and isolated from atmosphere, thus to avoid pollution.
