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解放前,上海市区(浦西部分)的城市系统分割成四个地区,由四个水厂及其独立管网分别供水。由于资本家分割经营和盲目发展,管网系统混乱,也极不合理。解放后不久,即着手对管网进行技术改造,挖掘管网潜力,并且根据不断发展的需要和存在的薄弱环节,敷设各种口径的管道,使管网布局基本上处于合理状态。通过挖潜改造,使原有输水管的输水能力从59万吨/日提高到130万吨/日。挖潜改造主要采取下述措施。一、合理选择管网沿线流量一般管网水力计算都是在假定沿线流量,选定合理的管径后进行的,因此合理选
Before liberation, the urban system of the Shanghai area (Puxi part) was divided into four areas, and four water plants and their independent pipe networks provided water. Due to the splitting up of business operations and the blind development of capitalists, it is extremely unreasonable for the pipe network system to be confusing. Shortly after the liberation, they began to carry out technological transformation of the pipeline network, tapped the potential of the pipeline network, and laid pipes of various calibers according to the continuous development needs and weak links, so that the layout of the pipeline network was basically in a reasonable state. Through tapping potential changes, the water conveyance capacity of the original water pipes increased from 590,000 tons to 1.3 million tons per day. The following measures have been adopted for tapping potential changes. First, reasonable choice of flow along the pipe network General pipe network hydraulic calculations are based on the assumption of flow along the line, after the selection of a reasonable diameter, so a reasonable choice