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A logic circuit, solenoid valve, and isolation valve of a nuclear power plant isolation valve

A logic circuit and isolation valve technology, which is applied to the logic circuit of nuclear power plant isolation valves, solenoid valves, and isolation valves, can solve problems such as inability to check and maintain them, increase the anti-malfunction function, and eliminate the risk of accidentally closing the valve Effect

Active Publication Date: 2018-07-20
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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  • A logic circuit, solenoid valve, and isolation valve of a nuclear power plant isolation valve
  • A logic circuit, solenoid valve, and isolation valve of a nuclear power plant isolation valve
  • A logic circuit, solenoid valve, and isolation valve of a nuclear power plant isolation valve

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific 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.

[0044] Such as figure 2 As shown, in the logic circuit of the nuclear power plant isolation valve of the present invention, it includes: open valve signal circuit, close valve signal circuit, close limit switch circuit, first NOT gate, first AND gate, RS flip-flop, first or Door. Each will be described in detail 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 can open the valve through buttons, touch screen, remote control, etc. ...

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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 relates to a logic circuit, a solenoid valve and an isolation valve of a nuclear power plant isolation valve. Background technique [0002] The closing feedback signals of the two important valves of MSIV (main steam isolation valve) and MFIV (main feedwater isolation valve) in nuclear power plants have the risk of causing the valves to close incorrectly. [0003] figure 1 It is a logic circuit diagram of the switching valve of the nuclear power plant isolation valve of the related art at present. The valve opening signal circuit and the valve closing signal circuit are used to control the switch of the valve. When the valve needs to be opened, the operator can control it through the button or the 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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