Electric control system for water supply with constant pressure and frequency conversion

Abstract

The invention discloses an electric control system for water supply with constant pressure and frequency conversion. The system comprises a water inlet pipe, an electromagnetic valve, a filter screen, a buffer water tank, a communicating water pipe, a one-way electromagnetic valve, a water supply tank, a drain pipe, a pressure stabilizing compensator, a first water supply pipe, a second water supply pipe, a remote pressure gauge, a butterfly valve, a motor controller, a water pump, a water outlet pipe, a circuit protecting device, a programmable controller, a frequency converter and a connecting pipe. The system disclosed by the invention has the beneficial effects that circulating soft start is conducted on the water pump by means of the frequency converter, so that the stability of the equipment which is started is guaranteed, the service life of equipment elements is prolonged, and electrical failures such as overload, under voltage, short circuit and phase sequence of the whole electric control system can be monitored; multiple protection and targeted protection are performed on the electric control system, so that the electric control system is safer and more reliable; and the programmable controller outputs a standard signal to control the output frequency of the frequency converter, so that the rotating speed of the motor of the variable frequency water pump is automatically adjusted to realize closed loop adjustment of the water pressure of a pipe network.

Description

technical field [0001] The invention relates to an electric control system for water supply, in particular to an electric control system for frequency conversion and constant pressure water supply, belonging to the field of water supply systems. Background technique [0002] Due to the shortage of water resources and electric energy in our country, the water supply quality of public pipe networks such as high-rise residential buildings, municipal buildings and industrial circulation is extremely important. This situation is particularly obvious during peak and low peaks of water consumption. For example, during peak water consumption, because the supply of water is lower than the demand of users, the water pressure decreases and the supply exceeds demand. In the case of oversupply, energy will be wasted, and even damage to water equipment such as water pipe bursts will occur. [0003] The existing water supply methods include constant speed pump direct water supply method, ...

AI Technical Summary

Problems solved by technology

For example, during peak water consumption, because the supply of water is lower than the demand of users, the water pressure decreases and the supply exceeds demand. In the case of oversupply, energy will be wasted, and even damage to water equipment such as water pipe bursts will occur.

[0003] The existing water supply methods include constant speed pump direct water supply method, constant speed pump water tower water supply method, jet pump water tank water supply method, constant speed pump high water tank water supply method, constant speed pump air pressure tank water supply method, etc. The control systems of these water supply methods are A non-closed-loop control system is difficult to self-regulate according to the user's water consumption in each time period, resulting in waste of water resources and electric energy, and the water pump and other equipment work under high load for a long time, reducing the service life of the equipment

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