Device and method for detecting state of electric control valve
A state detection device and electric control valve technology, applied in the field of maintenance of nuclear power plants, can solve the problems of hidden safety hazards in nuclear power plants and little information about the status and performance of electric control valves, so as to avoid related accidents and losses, avoid human error, Improve the status management level and the effect
Pending Publication Date: 2020-06-30
RES INST OF NUCLEAR POWER OPERATION +1
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Problems solved by technology
At present, most nuclear power plants use routine inspection, periodic inspection, component replacement or overall replacement to carry out preventive maintenance, and corrective maintenance (mainly dismantling maintenance) is carried out after obvious faults are found. Rarely, there are phenomena such as misrepair, missed repair, over repair, etc., and human error cannot be avoided, causing great safety hazards to the operation of nuclear power plants
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[0037] Below in conjunction with accompanying drawing and specific embodiment this patent is described in detail:
[0038] Such as figure 2 As shown, during the diagnostic test, the current sensor is installed on the power supply input cable of the electric actuator 9 in the form of a caliper; the voltage sensor is installed on the power supply input port of the electric actuator 9, and conducts correspondingly with it point-to-point; the switch sensor is installed on the The electric actuator 9 or the torque switch, limit switch, bypass switch, indicator switch and other contacts in the adjustable electric control box 7 are in contact with point-to-point corresponding contacts; the moving part of the displacement sensor is installed on the valve stem 8, and The valve stem 8 maintains parallel synchronous action, the thrust sensor is installed on the valve stem 8 in a caliper type, and runs up and down with the valve stem 8 (only for straight-stroke action valves), and the to...
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The invention belongs to the field of state detection of electric control valves, and particularly relates to a device and method for detecting the state of an electric control valve. At present, people know very little information about the status and performance information of electric control valves, phenomena such as erroneous repairs, missed repairs, and over-repairs exist, human errors cannot be avoided, and a greater safety hazard is caused for the operation of nuclear power plants. A sensor unit of the device is connected with a signal detection unit, the signal detection unit and a control signal output unit are connected with a data processing unit, and the data processing unit is connected with an upper computer via Ethernet. The state detection method includes the following steps of step 1, signal verification, step 2, data collection, step 3, data partial analysis, step 4, data overall analysis and step 5, completing of testing. During a shutdown period, the comprehensiveperformance of the electric control valve is diagnosed and tested, and meanwhile, the state performance of the repaired electric control valve is verified to effectively avoid human errors.
Description
technical field [0001] This patent belongs to the field of maintenance of nuclear power plants, and specifically relates to a state detection device and method for an electric regulating valve. Background technique [0002] In a nuclear power plant, the failure of the adjustment performance and switch failure of an electric control valve will cause serious safety accidents and economic losses, and it is the most concerned valve in nuclear power plants. At present, most nuclear power plants use routine inspection, periodic inspection, component replacement or overall replacement to carry out preventive maintenance, and corrective maintenance (mainly dismantling maintenance) is carried out after obvious faults are found. Rarely, there are phenomena such as misrepair, omission, and overrepair, and human error cannot be avoided, which has caused great safety hazards to the operation of nuclear power plants. [0003] The content of the present invention mainly aims at the above ...
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IPC IPC(8): F16K31/04F16K37/00
CPCF16K31/047F16K37/0083
Inventor 熊星满舒芝锋沈勇波符帅罗伟黄萍杨垦杨威刘赛楠刘洋
Owner RES INST OF NUCLEAR POWER OPERATION