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

Inactive Publication Date: 2010-06-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, since the high-pressure heater operates in a high-temperature and hig

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

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0021] Such as figure 1 with figure 2 As shown, the high-pressure heater internal leakage fault diagnosis device based on acoustic emission detection of the present invention includes a main control unit 8, a signal processing unit 5 and two acoustic emission sensors 4 fixed on the high-pressure heater shell 2, and the acoustic emission sensor 4 It is used to collect the acoustic emission signal when the internal leakage of the high-pressure heater occurs, convert the acoustic emission signal into an electrical signal, and then transmit it to the main control unit 8 through the signal processing unit 5, and the main control unit 8 is used to perform spectrum analysis on the above electrical signal Analysis and leak location analysis. Two acoustic emission sensors 4 can locate the leak of the high-pressure heater, and simultaneously mon...

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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.

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 ...

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Application Information

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IPC IPC(8): G01M3/24
Inventor 李录平晋风华张晓饶洪德
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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