DEVICE AND METHOD FOR CONTROLLING PRESSURE IN WATER SUPPLY NETWORK

摘要

PROBLEM TO BE SOLVED: To solve the problem that a high pushing pressure from water supply equipment B causes no water delivery accompanying reduction in a water supply flow rate and gives a pressure variance to consumers to cause the occurrence of muddy water, in a water supply network wherein water supply equipment A having variable speed pumps and return valves installed in parallel and the water supply equipment B are connected. SOLUTION: Water supply equipment wherein a plurality of pumps and return valves 15 including flow rate regulators are provided in parallel, in the water supply network for supplying clean water from a distribution reservoir to a consumer 14, includes: a pressure control device 10 for controlling variable speed pumps to a target pressure; an all pump stop period determiner 8 for detecting a state of crush to another water supply equipment by an actual water supply flow rate and an actual water supply pressure to determine the stop timing of all pumps by pump rotational frequencies; and an opening degree regulator for regulating opening/closing periods by a series of return valve opening/closing operations and a return flow rate and suppresses the pressure variance occurring when stopping all pumps of the water supply equipment. COPYRIGHT: (C)2011,JPO&INPIT