Frequency-conversion-type automatic constant-pressure water supplying system and method

Abstract

The invention relates to a frequency-conversion-type automatic constant-pressure water supplying system and method, and belongs to the technical field of automatic control. The frequency-conversion-type automatic constant-pressure water supplying system comprises a PLC, a frequency converter, a liquid level sensor, an analog quantity output module, a pressure sensor, a contactor switching circuit, a water pump, a motor and a manual control module. The analog quantity output module, the frequency converter and the manual control module are connected with the PLC, output signals detected through the liquid level sensor are connected with the analog quantity output module, output signals detected through the pressure sensor are connected with the analog quantity output module and a PID module of the frequency converter, the PLC and the PID module of the frequency converter are connected to the contactor switching circuit, the contactor switching circuit is connected with the motor, and the motor drives the water pump to run to supply water. By means of the frequency-conversion-type automatic constant-pressure water supplying system and method, the problems that water pressure is insufficient in the resident water peak period, and water pressure in the trough period is overlarge are solved; constant-pressure water supplying is achieved, resources are fully used accordingly, and the energy saving aim and the environment-friendly aim are achieved.

Description

technical field [0001] The invention relates to a frequency conversion type constant pressure automatic water supply control system and method, belonging to the technical field of automatic control. Background technique [0002] With the rapid development of society, cities continue to expand, the urban population continues to increase, and the water consumption of urban residents is greatly increased, which brings great pressure to the water plant. According to the current water supply system, the degree of automation existing in the water plant is different High energy consumption. In order to meet the daily needs of the increasing number of residents, the original old equipment of tap water has been overloaded, and the reliability has been greatly reduced. At the same time, it is difficult to ensure the stability of water supply during the peak period of water use. As people's requirements for water supply are increasing day by day, combined with today's rapidly developin...

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Problems solved by technology

[0003] The invention provides a frequency conversion type constant pressure automatic water supply control system and method, which are used to solve the problems of difficult and unstable water supply caused by the rapid increase of urban residents in existing cities. The water supply mode remains unchanged during the period, resulting in insufficient water pressure during the peak period and excessive water pressure during the low peak period, which cannot guarantee constant pressure water supply, and at the same time causes a serious waste of electric energy resources.

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