Heat exchanger heat transfer tube ultrasonic inspection device

Abstract

The invention relates to the technical field of heat exchanger heat transfer tube ultrasonic detection, and particularly discloses a heat exchanger heat transfer tube ultrasonic inspection device. Thedevice comprises a shell, a middle connector, a circumferential motor and a sliding brush; the circumferential motor is connected with an output shaft of a probe assembly through the sliding brush, and the circumferential motor and the output shaft of the probe assembly are jointly supported and fixed in the shell and fixed to the left side and the right side of the shell through the middle connector and a sealing head correspondingly to seal the shell; an outer ring contact of the sliding brush is in lap joint with an ultrasonic line, an outer ring of the fixed end of the sliding brush transmits ultrasonic signals, and an inner ring rotates to transmit circumferential torque. According to the device, spiral scanning with axial stepping and circumferential selection can be realized; coupling agent water needed by water immersion ultrasonic inspection is provided, the probe and the assembly are completely immersed in water for water immersion scanning, coupling agent water can be stably supplied and recycled, cracks in any direction in the heat transfer pipe can be detected, the wall thickness of the pipe wall can be monitored, and the defect detection capacity can be improved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic inspection of heat transfer tubes of heat exchangers, and in particular relates to an ultrasonic inspection device for heat transfer tubes of heat exchangers. Background technique [0002] The heat exchanger of a nuclear power plant--the steam generator is an intermediate bridge between the primary coolant circulation system and the secondary thermal system. Its main purpose is to exchange and transfer heat energy. The heat transfer tube is the key component for heat transfer. The heat transfer tube of the heat exchanger also plays a key role. The key function of the heat transfer tube is to exchange heat between the high-temperature and high-pressure primary side water and the secondary side water, and at the same time play the role of isolation and protection. When the heat transfer tube is working, it is affected by high temperature and high pressure water flow impact, vibration, corrosion,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultrasonic inspection device for heat transfer tubes of heat exchangers, which solves the problem that the existing eddy current detection technology is difficult to qualitatively and quantitatively analyze cracks with complex properties due to the small inner diameter and thin tube wall of the heat transfer tubes. Periodic inspection of the heat transfer tube of the device, especially the inspection of the special structure of the expansion tube area connecting the heat transfer tube and the tube sheet

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