Probe scanning tool suitable for detecting weld seams of different structures

Abstract

The invention discloses a probe scanning tool suitable for detecting weld seams of different structures and relates to the technical field of detection application of cladding weld seams of nuclear fuel cells. The probe scanning tool disclosed by the invention comprises a central spindle, a roller, auxiliary supporting plates, rolling wheels and a sensor, wherein a central spindle sensor mounting plane and a central spindle wiring trough are formed in the central spindle; two auxiliary supporting plates are arranged on the central spindle in a hinge form through the roller and can be stably limited at a certain angle; the rolling wheels capable of rolling in the axial direction of the weld seams are arranged on the auxiliary supporting plates; the sensor is arranged on the central spindle sensor mounting plane and can be limited at any peripheral position; a central spindle wiring trough in the axial direction is formed in the central spindle and is communicated with a mounting groove of the sensor. The probe scanning tool disclosed by the invention is capable of realizing fit scanning of a weld seam area, the accessibility and stability of the sensor are ensured, different types of sensors can be mounted at the same time, and cables can be well guided.

Description

technical field [0001] The invention relates to the technical field of inspection and application of cladding welds of nuclear power plant fuel pools, in particular to the design of a probe scanning tool suitable for inspection of welds of different structures. Background technique [0002] The fuel pool is used as a place for storing and cooling fuel assemblies and damaged fuel assemblies, as well as for underwater operations such as inspection, repair, and transportation of fuel assemblies. The cladding of the pool is spliced ​​by butt welding and L-shaped fillet welding of stainless steel plates of a certain size with a thickness of 3 to 5 mm. As a pressure-bearing boundary and in a boric acid environment, the weld zone is prone to localized corrosion and stress corrosion cracks. From the monitoring of some nuclear power plants at this stage, it has been found that the fuel pool has leaked, which has caused enough damage. Pay attention to. [0003] At present, the inspe...

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Problems solved by technology

[0004] At this stage, the methods that can be applied to weld inspection include ultrasonic, eddy current and other methods, but in this high-radiation environment, frequent disassembly and assembly of the probe will constantly put the staff at the risk of continuous radiation, and will also affect the detection signal. Therefore, it is necessary to develop a tool that can carry probes of different detection methods and scan welds of different structures at the same time

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