Safety signal protection system and method

Abstract

The invention discloses a safety signal protection system and method. The system comprises a protective cover plate, a protective cover plate position transmission device, a DCS and a prompting device. The protective cover plate comprises a coating position and an opening position, and when the protective cover plate is located at the coating position, the protective cover plate covers a safety signal electrical wiring terminal; the cover plate position transmission device is arranged near the protective cover plate or is connected with the protective cover plate, converts detected position information of the protective cover plate into a position switching value signal, and sends the position switching value signal to the DCS through a signal cable; the DCS receives the position switchingvalue signal, processes the position switching value signal and sends an alarm signal to the prompting device through a signal cable or an industrial control network; and the prompting device carriesout voice or information prompting according to a preset rule after receiving the alarm signal. The protective cover plate is arranged over a safety signal electrical wiring terminal, when the protective cover plate is turned over, early warning prompt is given to a safety signal operator, an operation watch keeper and a manager, and accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of safety assurance of industrial process systems, in particular to a safety signal protection system and method. Background technique [0002] At present, DCS systems are commonly used in industrial fields for industrial automation control. In particular, for energy, chemical and other enterprises that will affect social production and life, the on-site cabinets of the DCS system are often connected with a number of safety signal electrical terminals, and disconnecting or wiring such safety signal electrical terminals may cause major accidents or major economic losses. For example, in a power plant, each generating set has a steam turbine emergency blocking system. If the blocking signals such as high vibration of the steam turbine bearing bush and low pressure of the steam turbine lubricating oil are used, emergency braking will be performed when the steam turbine breaks through the safety bottom line, so...

AI Technical Summary

Problems solved by technology

Although companies and enterprises have employment training and related production safety licensing systems, the role of these training and systems is mainly reflected in pre-event education, restraint and post-event punishment. For the supervision of normal or abnormal operation of safety signals, it mainly relies on safety The professional ability and sense of responsibility of the signal operator lacks the necessary protection system to give early warning to the safety signal operator, operation watchman and management personnel when the safety signal operator performs the operation of disconnecting or wiring the safety signal electrical terminal , to avoid various human risk accidents in time

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