Valve control unit of automatic control system of uranium enrichment plant

Abstract

The invention belongs to the technical field of automatic control, and in particular relates to a valve control unit of an automatic control system in a uranium enrichment device manufactured by a centrifugal method. It includes a solid-state relay control circuit for controlling the solid-state relay switching circuit. The solid-state relay control circuit is respectively connected with a control chain circuit for discriminating control signals and a protection circuit for protecting the valve motor when a mechanical failure occurs in the valve. The protection circuit is connected with the valve motor. The output detection circuit used to detect the output signal is connected; the solid-state relay control circuit is connected to the valve terminal switch to receive the valve opening or closing permission signal issued by the valve terminal switch, and the control chain circuit is connected to the main control system to receive the signal from the main control system. External control signal, according to the external control signal, the valve control unit can connect the load motor to the circuit under the condition that the valve opening permission signal exists. The valve control unit has low cost, high reliability, easy operation and maintenance.

Description

Valve control unit of automatic control system of uranium enrichment plant Technical field The invention belongs to the technical field of automatic control, be specifically related to a kind of automatic control system in the uranium enrichment device manufactured by centrifugation valve control unit. Background technique What my country used in the past in centrifugal method to manufacture enriched uranium plant automatic control system is the valve imported from Russia Control unit, which belongs to the control technology in the early 1980s, mainly consists of thyristor switch, oscillator, rectifier, output It is composed of voltage comparator, transformer and Russian special logic circuit. where the oscillator is used to output the controlled SCR control Signals, transformers and rectifiers are used to convert the output voltage of the thyristor to the corresponding DC voltage, the logic control circuit and The comparator is used to ensure that when there is an ...

AI Technical Summary

Problems solved by technology

Defect, that is, when the valve refuses to move, if the control command is not eliminated, the unit always has output voltage, and the result will cause the valve to burn out

door motor or damage to the entire control unit

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