Nuclear power equipment pipeline inspection device

Abstract

The invention provides a nuclear power equipment pipeline inspection device which comprises a telescopic rod capable of stretching out and drawing back in the axis direction of the telescopic rod, a steering rod rotationally connected to the end of the telescopic rod, a holder rotationally connected to the end, away from the telescopic rod, of the steering rod, and a lens module rotationally connected to the holder. The rotation axis of the steering rod, the axis of the telescopic rod and the rotation axis of the lens module are perpendicular to each other, and the rotation axis of the holder is parallel to the rotation axis of the steering rod, so that the lens module can be sent to the position close to the turning part of the to-be-detected pipeline through telescoping of the telescopic rod; the lens module can be sent into the turning part of the to-be-detected pipeline through rotation of the rotating rod and telescopic cooperation of the telescopic rod, the lens module can be driven to achieve dead-corner-free detection through rotation of the holder and rotation of the lens module, operation is convenient, and the detection efficiency is high; the lens module can be kept in a suspended state by utilizing the rigidity of the telescopic rod, the steering rod and the holder, and the imaging effect is good.

Description

technical field [0001] The application belongs to the technical field of inspection, and in particular relates to a nuclear power equipment pipeline inspection device. Background technique [0002] In the field of nuclear power, after the nuclear power equipment has been in service for a certain period, it is necessary to conduct corrosion inspections on the pipelines of nuclear power equipment. Most of the existing inspection methods are visual inspections. The elbows and tees in the pipeline are relatively concealed, and the pipeline space is narrow, making it difficult for inspectors to enter. Moreover, the pipeline environment in some areas is unknown, and rashly entering by force is likely to cause damage to the health of inspectors, making it difficult for inspectors to enter. Carry out a comprehensive and complete inspection of the pipelines of nuclear power equipment, there are inspection dead ends, and there may be corrosion hazards or other defects that affect the ...

AI Technical Summary

Problems solved by technology

[0002] In the field of nuclear power, after the nuclear power equipment has been in service for a certain period, it is necessary to conduct corrosion inspections on the pipelines of nuclear power equipment. Most of the existing inspection methods are visual inspections. The elbows and tees in the pipeline are relatively concealed, and the pipeline space is narrow, making it difficult for inspectors to enter. Moreover, the pipeline environment in some areas is unknown, and rashly entering by force is likely to cause damage to the health of inspectors, making it difficult for inspectors to enter. Carry out a comprehensive and complete inspection of the pipelines of nuclear power equipment, there are inspection dead ends, and there may be corrosion hazards or other defects that affect the safe operation of nuclear power equipment in uninspected pipeline areas. Dismantling nuclear power equipment to determine the corrosion status of its internal pipelines is not only time-consuming and laborious, but also greatly prolongs the entire inspection period. Frequent disassembly and assembly may also reduce the service life of nuclear power equipment and pipelines

[0003] In the prior art, there is also a method of using an endoscope to inspect from the inside of the pipeline, but the wire tube supporting the probe on the existing endoscope is a flexible tube. With the extension of the inspection distance, the torque received by the wire tube becomes larger, and the probe It is easy to shake, which leads to poor imaging effect. When encountering parts that need to be turned, such as pipe elbows or tees, the only way to make the wires fit is to press the wire tube against and fit the inner wall of the pipe through the support force of the inner wall of the pipe. The pipe is bent and cannot be actively bent under the suspended condition, and the inner wall of the pipe on the abutting side cannot be observed normally. There is a dead angle for inspection, and the line pipe needs to be carefully fed to avoid scratches or contamination. The operation is inconvenient and the inspection efficiency is low. When facing the inner wall of the side pipe, the observation distance cannot be adjusted, the field of view is limited, and the imaging effect is poor. In addition, the probe of the existing endoscope does not have the measurement function, and the defect size of the pipe cannot be judged. It is necessary for the inspector to image according to the field of view of the endoscope Estimate, low accuracy, high work intensity

[0004] For nuclear power equipment, the pipeline lacks effective inspection methods for a long time, resulting in internal corrosion problems such as coating peeling failure, abnormal consumption of sacrificial anodes, damage to auxiliary anodes, and corrosion pits of the substrate that cannot be detected in time until the corrosion accumulates to the leakage of pipeline perforation At this time, pipeline defects will threaten the normal operation of the system and have an adverse effect on the stable and safe operation of the unit

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