Ultrasonic testing device for circumferential weld of cylinder of nuclear reactor pressure vessel

Abstract

The invention provides an ultrasonic testing device for a circumferential weld of a cylinder of a nuclear reactor pressure vessel. The ultrasonic testing device comprises a ball screw and a nut seat, wherein the ball screw is vertically arranged, the nut seat is sleeved on the ball screw, and a drive element is connected with the ball screw; the ball screw and the drive element are fixed on a base plate; one side of the base plate is fixed at one end of an inner sleeve, the inner sleeve is connected with a stretchable air cylinder, and the inner sleeve and the stretchable air cylinder are arranged in an outer sleeve; one end of a spring rope is fixed on the outer sleeve, and the other end of the spring rope is fixed on the base plate; a rotary air cylinder is fixed on one side of the nut seat, and a tray is fixed at the end part of the rotary air cylinder; the tray can rotate by 90 degrees through the rotary air cylinder, can extend and shrink through the extending and shrinking of the base plate and is driven to move up and down through the up-down moving of the nut seat. The ultrasonic testing device provided by the invention can be used for carrying out ultrasonic testing on the weld according to relevant examining code requirements, so that the accuracy and reliability of the data testing are improved, and the radiation of radioactive rays to a human body is reduced.

Description

technical field [0001] The invention belongs to the application of non-destructive testing of the circumferential weld seam of the nuclear reactor pressure vessel cylinder of a nuclear power plant, and in particular relates to an ultrasonic inspection device for the circumferential weld seam of the nuclear reactor pressure vessel cylinder. Background technique [0002] The nuclear power plant pressure vessel is one of the core components of the nuclear reactor coolant pressure boundary. It is composed of a flange ring, a barrel section, a water inlet and outlet joint, a top cover assembly, a bottom head, and a flange sealing structure. The body ring weld refers to the connecting weld between the flange ring and the shell section and the connecting weld between the shell section itself. The girth weld of the cylinder is one of the main objects of the non-destructive testing of the primary circuit system. Since defects such as bubbles, cracks, and slag inclusions are prone to ...

AI Technical Summary

Problems solved by technology

The girth weld of the cylinder is one of the main objects of the non-destructive testing of the primary circuit system. Since the metal is prone to defects such as bubbles, cracks, and slag inclusions after welding, the defective weld is prone to corrosion at the defect

The gradual expansion of corrosion will cause the leakage of radioactive coolant in the primary circuit, and serious safety accidents will occur. Therefore, non-destructive testing of this type of weld must be carried out regularly

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