Non-disturbance switching water pump control method

Abstract

The invention relates to a non-disturbance switching water pump control method comprising the following steps of: selecting different control manners of a water pump motor according to operation requirements of a water pump system; using a long-distance control manner of the water pump motor when a water pump normally works, so that a PLC (Programmable Logic Controller) performs monitoring and on-off control on a motor state automatically or according to set technological parameters; when the water pump has a fault and needs to maintain or carry out field emergency enablement, selecting an in-position control manner of the water pump motor which is operated to a field operation box; and realizing non-disturbance switching between the two modes when the motor continuously works through delay relays which are respectively arranged at each mode state in a mutual switching process. In a condition of not changing any technical requirement of the water pump system, the non-disturbance switching water pump control method provided by the invention can be used for not only realizing a control manner of mutually switching between a concentrated manner and a local manner of the water pump motor without being switched off, but also carrying out on-off operation on the field operation box and an HMI (Human-Machine Interface), so that the security reliability and operation convenience of the water pump system can be improved.

Description

technical field [0001] The invention relates to a water pump switching control method, which can be widely used in water treatment systems requiring continuous work in various industries. Background technique [0002] In industries with high requirements for the continuity of water treatment systems, such as continuous annealing, galvanizing, hot rolling, blast furnaces and converters in iron and steel enterprises, circulating water is required to cool the equipment to ensure normal operation of the equipment. Discontinuation of water supply will cause significant property damage. Therefore, ensuring the reliability and continuity of the water pump in the water treatment system is a prerequisite for the normal operation of the entire system. [0003] At present, our water supply system is controlled by PLC system. But usually, our water pumps may be interrupted due to various reasons on site, such as power failure, failure or downtime of PLC; interruption of communication ...

AI Technical Summary

Problems solved by technology

But usually, our water pumps may be interrupted due to various reasons on site, such as power failure, failure or shutdown of PLC; interruption of communication network; switching of operation modes in maintenance and emergency situations, etc.

This will have a great impact on the normal work of the water treatment system, so in the current method, the system reliability, continuity and safety need to be improved

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