Variable-frequency water supply device and method for centralized water supply system

Abstract

The invention discloses a variable-frequency water supply device and method for a centralized water supply system, is suitable for the centralized water supply system, and is used for ensuring systemstability of water supply of various water consumption regions. The variable-frequency water supply device for the centralized water supply system comprises a control unit, a relay I, a liquid level sensor, a pressure sensor and a relay II, wherein a water pump is connected with the control unit through the relay I and a cable; a pond water supply pump is connected with the control unit through the relay II and a cable; the control unit comprises a transformer, a water level signal converter, a frequency converter and a PLC; and the liquid level sensor is mounted in a pond, and is connected with the PLC through a cable and the transformer, the water level signal converter and the frequency converter in the control unit; and the pressure sensor is separately connected with a municipal watersupply pipe network system and the PLC through cables. Continuous water supply ability of the water consumption regions is improved, running stability of the water supply system is ensured, the controllability is high, and the practicality is also high.

Description

technical field [0001] The invention relates to the field of production and domestic water supply, in particular to a frequency conversion water supply device and method for a centralized water supply system. Background technique [0002] The centralized water supply system is an important and basic link in production and life, and the key to ensuring the normal operation of production and life. For example, in recent years, with the continuous improvement of the quality of life of residents, the occupancy rate of living quarters has continued to increase, and the water demand has doubled. Especially during the peak water consumption period for commuting and holidays, it is sometimes difficult for the general water supply technology system to meet the existing requirements. Daily water consumption; in addition, if the water supply facilities operate at high load for a long time or alternate between peak and low peaks of water consumption, the aging phenomenon of equipment wi...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this traditional control method is that due to the influence of water surface fluctuations when the pool enters the water, the control signal induced by the metal probe inside the float becomes unstable, making the command signal received by the control system unstable. Therefore, Causes the water supply pump to start and stop too frequently, and is in this overload state of alternating start and stop for a long time, resulting in damage to the water pump or water overflow, etc.

[0004] Furthermore, if the float is not replaced in time due to damage, the system receives an error signal, so that the original pool is at the full water level and needs to stop replenishing water, but due to the damage to the full water line of the float, the pump cannot stop replenishing water, resulting in overflow when the pool is full; On the contrary, it will cause water shortage in the pool, what's more, it will cause the pump to run idly, the pump body will suck a lot of air, the temperature of the pump coil will be too high, it will be easy to burn, and the internal impeller and bearing will be damaged, etc.

[0005] In addition, the traditional inspection and monitoring of the liquid level change of the pool requires on-site inspection, which is time-consuming and labor-intensive, and increases labor costs

[0006] In view of the above situation, a variety of technical solutions have also been proposed in the prior art, such as adding wireless modules to assist in signal enhancement. These solutions are all due to the cumbersome process of adding wireless modules, the easy damage of equipment lines, and the excessive influence of signal transmission on environmental factors. large, neither applicable

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