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Logic circuit and electromagnetic valve of nuclear power station isolating valve, and nuclear power station isolating valve comprising logic circuit and electromagnetic valve

A technology of logic circuit and isolation valve, which is applied in the direction of valve operation/release device, valve details, valve device, etc., can solve the problems that cannot be checked and maintained, increase the anti-maloperation function, and eliminate the risk of mistakenly closing the valve Effect

Active Publication Date: 2016-09-21
GUANGXI FANGCHENGGANG NUCLEAR POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The action of this switch means that the valve is closed, so it is impossible to check and maintain it daily, and its reliability can only be improved by replacing it with a new one during outage.

Method used

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  • Logic circuit and electromagnetic valve of nuclear power station isolating valve, and nuclear power station isolating valve comprising logic circuit and electromagnetic valve
  • Logic circuit and electromagnetic valve of nuclear power station isolating valve, and nuclear power station isolating valve comprising logic circuit and electromagnetic valve
  • Logic circuit and electromagnetic valve of nuclear power station isolating valve, and nuclear power station isolating valve comprising logic circuit and electromagnetic valve

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Embodiment Construction

[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0044] Such as figure 2 As shown, the logic circuit of the isolation valve for nuclear power plants of the present invention includes: open valve signal circuit, close valve signal circuit, close limit switch circuit, first NOT gate, first AND gate, RS trigger, first OR door. Detailed descriptions are given below.

[0045] The valve opening signal circuit is used to output a logic "1" signal when the operator inputs a valve opening command, otherwise it outputs a logic "0" signal. Specifically, the operator inputs the valve opening instruction through the user terminal, and can open t...

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PUM

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Abstract

The invention relates to a logic circuit and an electromagnetic valve of a nuclear power station isolating valve, and the nuclear power station isolating valve comprising the logic circuit and the electromagnetic valve. The logic circuit comprises an open valve signal circuit, an off valve signal circuit, an off limit switch circuit, a first NOT gate, a first AND gate, an RS trigger and a first Or gate. According to the logic circuit, the electromagnetic valve and the nuclear power station isolating valve, a malfunction preventing function of the RS trigger is added; optimization is performed under a precondition that an original designed function is not changed and no original safety function is affected; and a risk of mistakenly switching off the valve in switching off a feedback signal is thoroughly eliminated.

Description

Technical field [0001] The invention relates to the field of nuclear power control, and more specifically, to a logic circuit, solenoid valve and isolation valve of a nuclear power plant isolation valve. Background technique [0002] The closing feedback signals of two important valves, MSIV (Main Steam Isolation Valve) and MFIV (Main Feed Water Isolation Valve) in nuclear power plants, have the risk of causing the valve to close by mistake. [0003] figure 1 It is the logic circuit diagram of the on-off valve of the nuclear power plant isolation valve related to the current technology. The valve opening signal circuit and the valve closing signal circuit are used to control the opening and closing of the valve. When the valve needs to be opened, the operator can control it through a button or touch screen. At this time, the valve opening signal circuit outputs a logic "1" signal, passes through the AND gate, the OR gate, and then to the middle multi-input AND gate to achieve self...

Claims

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Application Information

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IPC IPC(8): G05B19/042F16K31/06
CPCF16K31/0675G05B19/0428G05B2219/24026
Inventor 任子华卢芳燕刘思远方鹏杨红光刘闯张春彪
Owner GUANGXI FANGCHENGGANG NUCLEAR POWER