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Nuclear power plant main steam isolation valve online diagnosis device and method

A diagnostic device and main steam technology, which is applied in mechanical valve testing, gas/liquid distribution and storage, pipeline systems, etc., can solve the problems of nuclear power plant safety hazards, many hydraulic equipment, incomplete understanding of performance status and degradation trend, etc. Achieve the effects of avoiding related accidents and losses, improving the level of state management, and verifiable maintenance effects

Pending Publication Date: 2021-04-30
CHINA NUCLEAR POWER OPERATION TECH +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large size and weight of the valve, it is driven by a gas-hydraulic linkage actuator, there are many hydraulic equipment, the control system is complex, the valve has many working modes (fast closing, slow closing, full open, and full open), and it lacks an online diagnostic device. It is difficult to fully grasp and evaluate the status. At present, domestic nuclear power plants mainly use conventional means of testing and on-site evaluation by technicians of foreign manufacturers, and their performance status and degradation trends are not fully understood. There are phenomena such as missed repairs and missed repairs, and operators need to cooperate for a long time. , human error is unavoidable, causing a greater safety hazard to the operation of nuclear power plants

Method used

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  • Nuclear power plant main steam isolation valve online diagnosis device and method
  • Nuclear power plant main steam isolation valve online diagnosis device and method

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Embodiment Construction

[0029] The main steam isolation valve of a nuclear power plant includes a valve body 10, a valve stem 8, a yoke 9, an actuator 7, a hydraulic control circuit 6, a limit switch 13, an oil pressure transmitter 12, a nitrogen pressure transmitter 11, and an actuator 7 It is used to provide power for the vertical movement of the valve stem 8. The valve stem 8 is connected to the valve disc inside the valve body 10. By changing the vertical position of the valve disc, the sealing state of the valve can be changed, thereby realizing the opening and closing of the valve. Wait for action. The hydraulic control circuit 6 is used to control the direction and magnitude of the oil pressure, and then change the position and motion state of the valve stem 8, thereby controlling the opening and closing state and the opening / closing process of the valve.

[0030] The present invention provides an online diagnosis device for the main steam isolation valve of a nuclear power plant, which includ...

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Abstract

The invention particularly relates to a nuclear power plant main steam isolation valve online diagnosis device. The nuclear power plant main steam isolation valve online diagnosis device comprises a sensor unit, a signal detection unit, a data processing unit and an upper computer, wherein the sensor unit, the signal detection unit, the data processing unit and the upper computer are in communication connection in sequence, and the sensor unit is mechanically connected to a nuclear power plant main steam isolation valve. According to the nuclear power plant main steam isolation valve online diagnosis device and method, the online detection technology and the fault diagnosis technology are integrated, and online diagnosis testing is conducted on the comprehensive performance of the main steam isolation valve on the premise that the valve is not dismounted or disintegrated.

Description

technical field [0001] The invention relates to the technical field of online diagnosis of a main steam isolation valve of a nuclear power plant, in particular to an online diagnosis device and method for a main steam isolation valve of a nuclear power plant. Background technique [0002] The main steam isolation valve of a nuclear power plant is a key sensitive device. The valve closes quickly within 5 seconds under accident conditions such as steam pipeline rupture. Once the valve fails during operation, it will cause major events such as unit shutdown. It is a nuclear power plant The key important valve. Due to the large size and weight of the valve, it is driven by a gas-hydraulic linkage actuator, there are many hydraulic equipment, the control system is complex, the valve has many working modes (fast closing, slow closing, full open, and full open), and it lacks an online diagnostic device. It is difficult to fully grasp and evaluate the status. At present, domestic n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/00G01M13/003
CPCF17D5/005G01M13/003
Inventor 舒芝锋韩杰杨威蒋文结黄萍阮杭浙李宏博王颖刘赛楠沈勇波杨垦
Owner CHINA NUCLEAR POWER OPERATION TECH
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