Ultrasonic system for online monitoring outer diameter of high-temperature pipeline based on surface waves

Abstract

The invention discloses an ultrasonic system for online monitoring the outer diameter of a high-temperature pipeline based on surface waves. The ultrasonic system comprises a core control system, a sound time measurement module, a surface wave sound time data acquisition module and an ultrasonic sound time-pipe diameter model establishment and data processing module, the core control system provides basic software and hardware functions of the system; the front end of the acoustic time measurement module is connected with an ultrasonic transducer, receives and measures an electric signal output by the ultrasonic transducer, and measures the acoustic time of the ultrasonic surface wave in the workpiece; the ultrasonic propagation sound time data acquisition module is used for carrying out data acquisition and signal conversion on the measured sound time; the ultrasonic surface wave sound time-pipe diameter model establishment and data processing module substitutes the collected sound time data into an ultrasonic surface wave sound time-pipe diameter model for calculation to obtain a pipe diameter value; through pre-modeling, the pipe diameter is obtained by using surface wave surface time data, and on-site detection and monitoring of in-service operation parts are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic flaw detection and monitoring, and in particular relates to an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves. Background Art

[0002] As a carrier for transmitting high-temperature, high-pressure liquids and gases, thick-walled pipes are widely used in the fields of electricity, petroleum, and chemical industry. Taking thermal power generation as an example, thick-walled pipes are the core components of the pipeline system of thermal power units. In order to improve the efficiency of thermal power generation, it is necessary to increase the pressure and temperature of steam. Therefore, the steam pipeline of the power station needs to use thick-walled pipes that can withstand very high steam pressure and temperature. However, in the process from blank to forming, thick-walled pipes may have defects such as looseness and shrinkage. At the same time, due to long-term operation in a high-temperature and high-pressure environment, due to creep, degeneration and stress relaxation of the material, thermal fatigue damage, corrosion and local thinning are prone to occur in thick-walled pipes. During operation, these defects are very easy to expand and may cause serious accidents such as pipe bursting and leakage. Therefore, it is necessary to carry out research on non-destructive testing technology for thick-walled pipes, which is of great significance for preventing accidents and maintaining safe production operation.

[0003] At present, domestic and foreign scholars have carried out a lot of fruitful research on non-destructive testing methods for thick-walled pipes. Common non-destructive testing methods for thick-walled pipes include: magnetic particle testing, penetrant testing, X-ray testing, magnetic flux leakage testing and ultrasonic testing. Magnetic particle testing and penetrant testing are mainly used for surface testing of thick-walled pipes. X-ray testing, magnetic flux leakage testing and ultrasonic testing have a large penetration depth and can be used for overall testing of thick-walled pipes. However, X-ray testing is harmful to the human body, and magnetic flux leakage testing requires that the inspected pipe must be made of ferromagnetic materials.

[0004] Ultrasonic testing technology is favored by nondestructive testing engineers and technicians because of its flexible detection and the fact that it can be used for both internal structural defect detection and surface defect detection. Using different detection modes, domestic and foreign scholars have conducted a lot of fruitful research on ultrasonic nondestructive testing methods for thick-walled pipes. For example, within the range where the probe incident angle is less than the first critical angle, the modified shear wave generated by the oblique incident of the refracted longitudinal wave on the outer wall of the steel pipe is used for the detection of longitudinal cracks on the inner wall of the thick-walled pipe; the circumferential guided wave generated by the oblique probe is used for the detection of defects in the thick-walled pipe, which can realize the detection of thick-walled pipes in the entire circumferential thickness range. However, this method is difficult to detect circumferential cracks in the pipeline; in addition, longitudinal waves are used to detect area defects, shear waves are used to detect transverse defects on the inner and outer walls and longitudinal defects on the outer wall, and the feeding of the detection system is controlled by the feeding device to realize the overall detection of thick-walled pipes, but this method is difficult to detect longitudinal defects on the inner wall. Overall, there is currently no solution for online and accurate monitoring of the outer diameter of high-temperature pipelines in operation, and the penetration ultrasonic detection faces the practical problem of difficulty in selecting the installation position when arranging the probe on site. Summary of the invention

[0005] The purpose of the present invention is to provide an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves for online construction measurement of a high-temperature pipeline in operation.

[0006] An ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves comprises: a core control system, an acoustic time measurement module, a surface wave acoustic time data acquisition module, and an ultrasonic acoustic time-pipe diameter model establishment and data processing module; the core control system provides basic system software and hardware functions; the front end of the acoustic time measurement module is connected to an ultrasonic transducer to receive and measure the electrical signal output by the ultrasonic transducer, and measure the acoustic time of the ultrasonic surface wave inside a workpiece; the ultrasonic propagation acoustic time data acquisition module performs data acquisition and signal conversion on the measured acoustic time; the ultrasonic surface wave acoustic time-pipe diameter model establishment and data processing module substitutes the collected acoustic time data into the ultrasonic surface wave acoustic time-pipe diameter model for calculation to obtain the pipe diameter value.

[0007] The beneficial effects of the present invention are:

[0008] Compared with the prior art, the present invention designs an ultrasonic system for online monitoring of the outer diameter of high-temperature pipelines based on surface waves. Through pre-modeling, the pipe diameter is obtained using surface wave surface time data to achieve on-site detection and monitoring of in-service running parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the system working principle diagram.

[0010] Figure 2 This is a diagram showing the composition of the system functional modules.

[0011] In the figure: core control system 1, control system login module 2, acoustic time measurement module 3, surface wave acoustic time data acquisition module 4, ultrasonic acoustic time-pipe diameter model establishment and data processing module 5, system alarm module 6, propagation acoustic time data storage module 7, propagation acoustic time data comparison module 8, system power supply module 9, data transmission module 10, control terminal 11. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] Its working principle is as follows Figure 1As shown, the workpiece is detected by an ultrasonic transducer to obtain an ultrasonic signal, which is processed by a signal acquisition module and input to a signal processing device through an interface conversion.

[0014] The signal processing device includes system software and a driver program. The signal processing device analyzes and processes the received signal.

[0015] The specific system composition is as follows Figure 2 As shown,

[0016] The ultrasonic system for online monitoring of the outer diameter of high-temperature pipelines based on surface waves includes: a core control system 1, a control system login module 2, an acoustic time measurement module 3, a surface wave acoustic time data acquisition module 4, an ultrasonic acoustic time-pipe diameter model establishment and data processing module 5, a system alarm module 6, a propagation acoustic time data storage module 7, a propagation acoustic time data comparison module 8, a system power supply module 9, a data transmission module 10, and a control terminal 11, a total of 11 parts.

[0017] The core control system 1 provides basic software and hardware functions of the system.

[0018] The control system login module 2 is used to verify user login. The system can be operated and data can be called only after entering the self-defined account and password and being verified by the core control system. It is mainly used to enter the high-temperature sound-time monitoring system and protect the data saved in the propagation sound-time data storage module.

[0019] The front end of the acoustic time measurement module 3 is connected to an ultrasonic transducer to receive and measure the electrical signal output by the ultrasonic transducer, and measure the acoustic time of the ultrasonic surface wave inside the workpiece;

[0020] The ultrasonic wave propagation sound time data acquisition module 4 performs data acquisition and signal conversion on the measured sound time.

[0021] The ultrasonic surface wave acoustic time-tube diameter model establishment and data processing module 5 includes an ultrasonic surface wave acoustic time-tube diameter model establishment module and an ultrasonic surface wave acoustic time-tube diameter calculation and data processing module.

[0022] The ultrasonic surface wave acoustic time-tube diameter establishment module determines the model parameters and fits the model curve based on the tube diameter and ultrasonic surface wave propagation time data obtained from the calibration test, and uses computer language algorithms to generate the fitted curve, thereby completing the establishment of the entire ultrasonic surface wave acoustic time-tube diameter model.

[0023] The ultrasonic surface wave acoustic time-tube diameter model calculation and data processing module substitutes the collected acoustic time data into the ultrasonic surface wave acoustic time-tube diameter model for calculation to obtain the tube diameter value.

[0024] The propagation sound-time data storage module 7 is responsible for storing the sound-time data of the ultrasonic surface wave in the workpiece and the calculated pipe diameter. The propagation sound-time data storage module 7 is equipped with a data management module, which supports the recording, statistics, analysis and modification of the data recorded by the system, and is equipped with a system database for storing various data; the system database can not only store the measured sound time and the calculated pipe diameter, but also can manually input the safe pipe diameter range value accepted under normal working conditions. In addition, the propagation sound-time data storage module 7 is also equipped with a data backup module, which can copy the measured and analyzed data. And the data in the system database and the data backup module can be uploaded to the cloud database by wired means to reduce the risk of data loss. The propagation sound-time data storage module 7 is also equipped with a data encryption module, which can realize the sealing and protection of data in conjunction with the control system login module.

[0025] The core control system, system alarm module and propagation sound data comparison module are combined to realize the system's alarm function for abnormal data.

[0026] The data comparison module 8 obtains the calculated pipe diameter value and the safe pipe diameter range value through the core control system, and compares them. If the safe pipe diameter range is exceeded, the system alarm module outputs an alarm message.

[0027] The core control system and data transmission module constitute a signal transmission system, which can transmit data and the main display screen in the software to any control terminal through a wired connection with a network cable or a wireless LAN. The control terminal includes a fixed or mobile device.

[0028] Finally, it should be noted that the above description is only an explanation of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail, those skilled in the art can still modify the technical solutions described above or replace some of the technical features with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves, comprising: Core control system, acoustic time measurement module, surface wave acoustic time data acquisition module, ultrasonic acoustic time-tube diameter model establishment and data processing module; characterized in that the core control system provides basic system software and hardware functions; the front end of the acoustic time measurement module is connected to the ultrasonic transducer, receives and measures the electrical signal output by the ultrasonic transducer, and measures the acoustic time of the ultrasonic surface wave inside the workpiece; the ultrasonic propagation acoustic time data acquisition module performs data acquisition and signal conversion on the measured acoustic time; the ultrasonic surface wave acoustic time-tube diameter model establishment and data processing module substitutes the collected acoustic time data into the ultrasonic surface wave acoustic time-tube diameter model for calculation to obtain the tube diameter value.

2. According to claim 1, an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves is characterized in that ,The ultrasonic surface wave acoustic time-tube diameter model establishment and data processing module includes an ultrasonic surface wave acoustic time-tube diameter model establishment module and an ultrasonic surface wave acoustic time-tube diameter calculation and data processing module; The ultrasonic surface wave acoustic time-tube diameter model building module determines the model parameters and fits the model curve based on the tube diameter and ultrasonic surface wave propagation time data obtained from the calibration test, and uses the computer language algorithm to generate the fitted curve, thereby completing the establishment of the entire ultrasonic surface wave acoustic time-tube diameter model; The ultrasonic surface wave acoustic time-tube diameter calculation and data processing module substitutes the collected acoustic time data into the ultrasonic surface wave acoustic time-tube diameter model for calculation to obtain the tube diameter value.

3. According to claim 1, an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves is characterized in that ,The system also includes: a propagation sound time data storage module ,responsible for saving the sound time data of the ultrasonic surface wave in the ,workpiece and the calculated pipe diameter.

4. According to claim 3, an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves is characterized in that The data storage module of propagation sound time is equipped with a system database for storing various data; the system database not only stores the measured sound time and calculated pipe diameter, but also manually inputs and stores the safe pipe diameter range value accepted under normal working conditions.

5. According to claim 3, an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves is characterized in that ,When propagating sound, the data storage module is also equipped with a data backup module, which copies and backs up the data after measurement and analysis processing, and the data in the system database and the data backup module can be uploaded to the cloud database through network communication.

6. According to claim 3, an ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves is characterized in that ,The data storage module is also equipped with a data encryption module in the ,transmission sound, which cooperates with the system login module to realize the ,sealing and protection of the data.

7. The ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves according to claim 4, characterized in that The system also includes: a system alarm module and a propagation sound data comparison module; the propagation sound data comparison module obtains the calculated pipe diameter value and the safe pipe diameter range value through the core control system, and compares them. If the safe pipe diameter range is exceeded, the system alarm module is used to output an alarm message.

8. The ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves according to claim 3, characterized in that ,The system also includes: a data transmission module and a control terminal. The core control system and ,data transmission module constitute a signal transmission system that transmits ,data to the remote control terminal through a wired or wireless network.

9. The ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves according to claim 3, characterized in that ,The system also includes a control system login module, which is used to verify the user login. The system can be operated and data called only after the ,user enters the self-defined account and password is verified by the ,core control system.

10. The ultrasonic system for online monitoring of the outer diameter of a high-temperature pipeline based on surface waves according to claim 8, characterized in that ,The control terminal includes fixed or mobile devices.

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