A design method of interlocking self-starting and interlocking for mutual standby pumps

Abstract

The invention discloses a mutually standby pump chain self-starting and interlocking design method, which is characterized in that logic function modules such as an AND gate logic module, an OR gate logic module, a timer module, a pulse output module, a delay output module and the like in software functions of a DCS (distributed control system) are utilized, technological parameters are detected continuously through a detection instrument, detection signals are sent to the DCS, the DCS carries out a logic operation by using the logic function modules, and the DCS carries out chained start and outputs a logic operation result to a motor control center (MCC) so as to realize control for an electrical execution end when the technological parameters are abnormal, thereby realizing self-starting of a standby pump and stop of the current working pump. The logic control method disclosed by the invention not only can realize immediate start of the standby pump when the working pump breaks down, but also can avoid a circumstance that the two pumps works simultaneously, thereby ensuring the safety and the continuity of production.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a design method for realizing the interlocking self-starting and interlocking of mutual backup pumps by using the interlocking logic function of DCS (Distributed Control System, that is, decentralized control system). Background technique [0002] In chemical equipment, in order to ensure continuous production and avoid equipment shutdown due to equipment failure, the design method of one for use and one for standby is often adopted. The design of the pump is usually set up two, one working, one standby. [0003] In the existing technology, the control of the pump is usually manually controlled by the operator. This control method has poor reliability and increases the workload of the operator. At the same time, if the operation is not timely, it will affect the smooth progress of production. At the same time, there are also operators who make mistakes, cau...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the control of the pump is usually manually controlled by the operator. This control method has poor reliability and increases the workload of the operator. At the same time, if the operation is not timely, it will affect the smooth progress of production.

At the same time, there are also operators who make mistakes, causing two pumps to start at the same time, which has a negative impact on production and safety.

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