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

A design method and self-starting technology, applied in the direction of comprehensive factory control, electrical program control, comprehensive factory control, etc., can solve problems such as unfavorable production and safety, operator error, influence, etc., to achieve a simple and clear control process and avoid chain-linking. The effect of parking and high system stability

CN105204453BActive Publication Date: 2019-06-14SHANGHAI KEYONTECHS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-06-14

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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.
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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...

Examples

Embodiment Construction

[0019] In order to make the objects, technical solutions and advantages of the present invention more clear, the following in conjunction with specific examples and with reference to the accompanying drawings Figure 1 to Figure 3 , to further describe the present invention in detail. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0020] Such as figure 1 As shown, the OS bypass switch is set for the initial start-up, because in the initial start-up, the process parameters are unstable, in order to avoid unnecessary chain actions, set a pulse output module PO, the time t=60S adjustable, in the setting During the time t, the signal received by the second input terminal of the OR gate logic module is always "1", so that t...