Cable built-in probe disk device for nuclear power plant pipeline outer wall ultrasonic inspection

Abstract

The invention discloses a cable built-in probe disk device for nuclear power plant pipeline outer wall ultrasonic inspection. The device includes: a probe disk frame body, a probe disk cover plate fixedly installed on the probe disk frame body and covering installation grooves, a medium conveying mechanism installed in one of the installation grooves, support frames fixed on the probe disk frame body, and inspection components and movement components installed on the support frames. The plurality of support frames are divergently distributed on the probe disk frame body with the axis of the probe disk frame body as the shaft axis, cables of the inspection components are made into one bundle or multiple bundles accommodated in other installation grooves. The support frames and probe disk whole can be disassembled and assembled quickly, and installation time is saved; a large number of pipelines can be accommodated in the probe disk frame body at one time, and disassembly is unnecessary,the cable number at each cable outlet is greatly reduced, plugging is convenient, installation does not go wrong easily, and the equipment operation is safer; the probe disk is added with a word linelaser design for alignment to a to-be-inspected pipeline steel seal number, and the circumferential positioning is accurate.

Description

Technical field [0001] The invention belongs to the technical field of ultrasonic testing, and in particular relates to a cable built-in probe disk device used for ultrasonic inspection of the outer wall of a nuclear power plant pipeline. Background technique [0002] The nuclear power plant system contains a large number of pipes, most of which are welded and connected. During the operation of nuclear power, the pipes carry high temperature, high pressure, high flow velocity, and water media containing radioactive substances. In this working environment for a long time, butt welds of pipelines are prone to stress corrosion cracking, corrosion, collision, and thinning. Therefore, it is necessary to develop special automated equipment for ultrasonic inspection of welds, reduce the exposure dose of workers, and ensure the quality and safety of nuclear power plant equipment. [0003] The Chinese invention patent with application number 2014101394513.3 published an ultrasonic automati...

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Problems solved by technology

[0003] The Chinese invention patent with the application number 2014101394513.3 discloses an ultrasonic automatic scanning device for large-diameter pipelines in nuclear power plants. The mechanical scanning part includes a circumferential guide rail part, a circumferential movement module and an axial movement module. Disassembly and assembly, however, the probe disc contained in the axial movement module is passed through by the lead screw and cannot be disassembled quickly, which brings inconvenience to the installation, commissioning and maintenance of the equipment, and increases the time for workers to be exposed to the radioactive environment; and the embodiment The middle probe plate contains up to 8 probes. If calculated according to the 2 ultrasonic signal lines and 4 couplant pipelines for each probe, the probe plate requires a total of 48 ultrasonic signal lines and couplant supply lines, plus the probe plate The installed camera cables and probe coil pipelines are complex in distribution, time-consuming and error-prone to install, and if the cable bounces off during the operation of the equipment, it is easy to interfere with devices near the pipeline; in addition, although the probe coil is equipped with a camera, it is difficult to observe the pipeline marks Lack of datum, inconvenient for circumferential positioning

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