High pressure heater internal leakage fault diagnosis device based on acoustic emission detection

A technology of fault diagnosis device and high-pressure heater, which is applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve problems such as high detection technology requirements, achieve high sensitivity, Improve security and real-time performance, simple structure effect
CN101750193AInactive Publication Date: 2010-06-23CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2010-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high pressure heater internal leakage fault diagnosis device based on acoustic emission detection, which comprises a main control unit, a signal processing unit and two acoustic emission sensors fixed on the casing of the high pressure heater; the acoustic emission sensors are used for acquiring the acoustic emission signal when the high pressure heater has internal leakage, and converts the acoustic emission signal to an electrical signal and transmits the electrical signal to the main control unit through the signal processing unit; the main control unit is used for performing spectrum analysis and leakage point positioning analysis towards the electrical signal, and determines the leakage point according to the time difference generated when the leakage sound is transmitted to the two acoustic sensors. The high pressure heater internal leakage fault diagnosis device based on acoustic emission detection has simple and compact structure, simple operation, good use effect and safety.
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Description

technical field

[0001] The invention mainly relates to the field of heaters, in particular to a device for diagnosing internal leakage faults of high-pressure heaters based on acoustic emission detection. Background technique

[0002] The internal leakage fault of the high pressure heater is one of the main faults in the heat recovery system of thermal power plants. If it is possible to carry out early on-line monitoring and diagnosis of leakage, track and report the degree and trend of leakage, and timely judge the leakage and location of the high-pressure pipeline, on the one hand, it can effectively prevent the expansion of the accident, and on the other hand, it can make the power plant prepare for emergency repair in advance, reducing unnecessary economic loss. However, since the high-pressure heater operates in a high-temperature and high-pressure environment, the requirements for detection technology are very high. Contents of the invention

[0003] The technical ...

Claims

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