Detection device for heat transfer tube of steam generator

Abstract

The invention discloses a detection device for a heat transfer tube of a steam generator. The detection device comprises a steel wire rope, a walking assembly which is used for being hung on the steel wire rope and can slide along the steel wire rope, a rotating elbow assembly and a video probe. The steel wire rope is used for being erected at the preset height above the heat transfer pipes in the steam generator. The rotating elbow assembly comprises a rotating support and an elbow, the rotating support is arranged on the walking assembly and can rotate around the central axis of the rotating support, the fixed end of the elbow is fixed to the rotating support, and the free end of the elbow can stretch into the heat transfer pipes. The video probe is used for being arranged at the free end of the elbow, and when the free end of the elbow extends into the heat transfer pipes and rotates to the position aligned with one heat transfer pipe, the video probe detects the heat transfer pipe. The video probe can be quickly inserted between the heat transfer pipes in the steam generator, and the video probe is aligned with one heat transfer pipe and detects the heat transfer pipe, so that the detection efficiency of the heat transfer pipe is improved, and the operation is safe and reliable.

Description

technical field [0001] The present application relates to the technical field of steam generator maintenance, in particular to a detection device for a heat transfer tube of a steam generator. Background technique [0002] The steam generator is one of the key components in the nuclear island of a nuclear power plant, and its reliability and stability have a significant impact on the safety performance and utilization of the entire nuclear power plant. When the steam generator is in high temperature and high pressure water environment, insoluble corrosive substances will be generated, and these insoluble corrosive substances will be deposited on the surface of the secondary side tube sheet, specifically, these insoluble corrosive substances will be deposited on the surface of the secondary side tube sheet On the heat transfer tube, it will eventually lead to problems such as heat transfer tube corrosion, heat transfer efficiency drop and water level instability in the steam ...

AI Technical Summary

Problems solved by technology

In the above inspection process, due to the small distance between the heat transfer tubes and the relatively soft flat belt, it is difficult for the video probe to be inserted between the heat transfer tubes, which is time-consuming and laborious, and the work efficiency is low

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