Nuclear power plant quick-closing electromagnetic valve control circuit and main steam system

A technology for controlling circuits and solenoid valves, applied in general control systems, control/regulation systems, circuits, etc., can solve problems such as low reliability

Active Publication Date: 2020-10-23
LINGDONG NUCLEAR POWER +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a nuclear power plant fast-closing solenoid valve control circuit, aiming to solve the problem of low reliability of the traditional solenoid valve control circuit

Method used

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  • Nuclear power plant quick-closing electromagnetic valve control circuit and main steam system
  • Nuclear power plant quick-closing electromagnetic valve control circuit and main steam system
  • Nuclear power plant quick-closing electromagnetic valve control circuit and main steam system

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Embodiment Construction

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0043] The first aspect of the embodiment of the present invention provides a nuclear power plant quick...

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Abstract

The invention belongs to the technical field of nuclear power station main steam systems, and provides a nuclear power plant quick-closing electromagnetic valve control circuit and a main steam system. The nuclear power plant quick-closing electromagnetic valve control circuit comprises a first electromagnetic valve control circuit and a second electromagnetic valve control circuit which are in redundant design, wherein the first electromagnetic valve control circuit comprises a first relay, a second relay, a third relay, a first self-holding loop, a second self-holding loop and a first quick-closing relay circuit; the first relay and the second relay are changed into normally open contacts which are connected in series to control the third relay, namely a conduction relay; and normally open contacts sent to the self-holding loops by the third relay are changed into normally closed contacts. According to the nuclear power plant quick-closing electromagnetic valve control circuit, the same logic function as the original design is achieved, the third relay is changed from a normally-excited state to a normally-demagnetized state in the power operation period, the fault that a main steam isolation valve is closed due to excitation of A-column quick-closing electromagnetic valves caused by a single fault of the third relay can be effectively avoided, and the driving reliability ofthe main steam isolation valve is improved.

Description

technical field [0001] The invention belongs to the technical field of the main steam system of a nuclear power plant, and in particular relates to a control circuit and a main steam system of a fast-closing solenoid valve of a nuclear power plant. Background technique [0002] At present, the main steam system (VVP) isolation valve VVP001 / 002 / 003VV is responsible for important safety functions. When the reactor protection system (RPR) sends a steam isolation signal, it must be closed quickly within 5s. Its control equipment mainly includes: relay circuit, solenoid valve, wrong oil valve, remote control operation switch and valve position switch, etc., which are divided into two columns to realize four operating modes: fast closing, slow closing, partial closing and valve opening. [0003] VVP001 / 002 / 003VV valve control adopts two columns of redundant logic, and a dual-channel line (CH1 / CH2) is specially set for the self-holding circuit of the valve opening signal. A single...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00F17D1/00F17D3/01F16K31/06G05B9/03
CPCH01H47/001F17D1/005F17D3/01F16K31/0675G05B9/03Y02E30/30
Inventor 刘立华
Owner LINGDONG NUCLEAR POWER
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