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通过对无负压供水系统的典型试用小区进行现场测试,并结合管网模型的实时模拟结果,研究了无负压供水系统的使用对市政供水管网的影响。结果表明,在市政供水量满足要求的条件下,无负压供水系统正常使用时的压力波动与市政供水管网的基本一致,该系统的使用对市政供水管网的影响不大。采用无负压供水系统时,市政供水管网在使用区域的供水量应能满足用户最大小时用水量的要求,且接入处的供水管网的管径不宜小于300mm。
Through the field test of the typical pilot area of non-negative pressure water supply system and the real-time simulation result of the pipe network model, the influence of the use of non-negative pressure water supply system on the municipal water supply network was studied. The results show that under the conditions of municipal water supply to meet the requirements, the pressure fluctuation of normal negative pressure water supply system is basically the same with that of municipal water supply network, and the use of this system has little effect on the municipal water supply network. When using non-negative pressure water supply system, the water supply of municipal water supply network in the used area should meet the requirement of the user’s maximum hourly water consumption, and the diameter of the water supply pipe network in the access place should not be less than 300mm.