Small diameter pipe inner wall inspection probe assembly

Abstract

The invention provides a small-diameter tube inner wall detection probe assembly. The small-diameter tube inner wall detection probe assembly comprises a connecting tube, wherein one end of the connecting tube is connected with an automatic mechanical device through a flange, and the other end of the connecting tube is connected with a frame body through at least one coupling; the frame body is provided with a plurality of elastic pressing arms along the circumferential direction; the elastic pressing arms comprise connecting ends connected with the frame body and protruding ends protruding outwards along the radial direction of the frame body; the protruding ends of the elastic pressing arms can elastically displace towards the frame body under the action of external force; the elastic pressing arms are provided with probe mounting blocks for mounting detection probes; the probe mounting blocks are provided with protruding parts protruding to one side, away from the frame body, of each of the elastic pressing arms. The small-diameter tube inner wall detection probe assembly has the advantages of easiness in operation, good alignment, good probe coupling effect and the like, can effectively solve the problem of implementing lossless detection of a weld joint of a top cover instrument connecting tube of a reactor pressure vessel from interior and meets the requirement of safety operation of nuclear power.

Description

technical field [0001] The invention relates to a probe assembly for inspecting the inner wall of a small-diameter pipe. Background technique [0002] The function of the instrument nozzle penetration of the top cover of the reactor pressure vessel is to provide an interface for the connection between the internal measurement sensor of the reactor pressure vessel and the external instrument, and at the same time to ensure the sealing integrity of the reactor pressure vessel, prevent the leakage of radioactive materials, and ensure nuclear safety. [0003] Due to manufacturing and installation reasons, there is a welding seam in the middle of the instrument nozzle penetration. The welding seam may produce defects such as incomplete fusion and incomplete penetration during the welding process, and during the operation of the nuclear power plant, the welding seam is in a long-term vibration environment. Among them, coupled with the combined action of high temperature, high pres...

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a probe assembly for inspection of the inner wall of a small-diameter pipe, which is used to solve the problem in the prior art that there is no probe assembly capable of performing non-destructive testing from the inner wall of a small-diameter pipe

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