Infrared rapid detection device for pipeline defects and defect risk assessment method

Abstract

The invention discloses an infrared rapid detection device for pipeline defects and a defect risk assessment method, and belongs to the technical field of pipeline detection.The infrared rapid detection device comprises an unmanned aerial vehicle and a thermal infrared imager arranged on the lower surface of the unmanned aerial vehicle, the unmanned aerial vehicle and the thermal infrared imager are electrically connected with a controller, and the controller is connected with a display screen used for displaying thermograms; the unmanned aerial vehicle flies in the circumferential direction of the pipeline and stays for preset time every time the unmanned aerial vehicle flies to a designated position; according to the shooting angle theta of the thermal infrared imager, the single flight time t of the unmanned aerial vehicle and the diameter d of the to-be-detected pipeline, the pipe winding flight speed v of the unmanned aerial vehicle is determined; the unmanned aerial vehicle can carry the thermal imager to shoot and detect a pipeline at a high position, manual climbing is avoided, the detection risk is reduced, and the working efficiency is improved; a detector performs remote operation, and the safety of the detector is improved for relatively dangerous pipe sections; the infrared thermal imager is high in response speed and high in temperature measurement accuracy, so that the working efficiency can be improved, and the detection cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of pipeline detection, in particular to an infrared rapid detection device for pipeline defects and a risk assessment method thereof. Background technique [0002] The world's major energy producing and consuming countries attach great importance to pipeline safety. Pipeline safety is also one of the key technical issues that my country's energy, chemical industry, especially oil and gas storage and transportation fields focus on. [0003] After the pipeline has been in service for a long time, due to aging, corrosion, stress damage and other reasons, it is easy to produce pipeline defects, which will cause pipeline cracking and leakage, resulting in major safety accidents. In the process of oil and gas transportation, high temperature and high pressure transportation is required for the consideration of transportation conditions, which puts forward high requirements on the bearing capacity of the pipeline i...

AI Technical Summary

Problems solved by technology

Therefore, whether it is the initial crack defect or pipeline corrosion, if it is not detected and repaired in time, it will cause greater safety hazards in the later stage, and at the same time, it will indirectly increase the pipeline maintenance costs of relevant units, so the detection of pipeline defects is very important. important

[0004] Defects and deficiencies of existing detection technology: frequency conversion and frequency selection method is a common detection method for pipeline corrosion defects. Although the operation is simple, the detection accuracy will deviate as the detection distance increases

However, there are still some shortcomings in the process of use: firstly, the human body capacitance method requires operators to have a good level of knowledge and culture in the detection process, so as to better obtain information on corrosion defects of long-distance pipelines; secondly, before using this method, it must be selected The optimal emission position of the detection signal, if not selected properly, will seriously affect the quality of the detection results

[0005] To sum up, the frequency conversion and frequency selection method is simple to operate but the detection accuracy is poor, the cost of the current drawing method in the tube is high, and the human body capacitance method requires high technical and professional knowledge of the staff; therefore, an effective solution is urgently needed. Poor precision, high cost and high operation requirements, and real-time monitoring of key parts, effectively avoiding major safety hazards of pipeline defect detection equipment

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