Ultrasonic water-logging testing and positioning drive device for small pipeline

Abstract

The invention belongs to a non-destructive nuclear power station testing technology and particularly discloses an ultrasonic water-logging testing and positioning drive device for a small pipeline. The ultrasonic water-logging testing and positioning drive device comprises a peripheral sleeve, a peripheral mandrel in the peripheral sleeve and an axial component connected with the peripheral mandrel, wherein a peripheral driving gear and a peripheral driven gear which are meshed are arranged in the peripheral sleeve, the peripheral driven gear is connected with the peripheral mandrel, and the peripheral driving gear is driven through a motor. The axial component at the front end is driven to rotate by designing the peripheral mandrel, meanwhile makes an axial slide block to perform axial movement on a guide rail through drive matching between a bevel gear pair and a spur gear pair and conveying of a conveying belt, and accordingly can drive and position relevant positioning devices.

Description

technical field [0001] The invention belongs to the non-destructive testing technology of nuclear power plants, and in particular relates to a positioning driving device for water immersion ultrasonic testing. Background technique [0002] There are different pipes on the nuclear reactor pressure vessel. According to the requirements of relevant specifications, regular non-destructive testing of the welds of these pipes is required. Since the pipe near the pressure vessel is wrapped with an insulation layer, it is troublesome to dismantle it. At the same time, the dose rate of the external environment is relatively high, so it is difficult to detect from the outside. Therefore, the inspection can be carried out from the inside of the pipeline, but the ultrasonic inspection from the inside is divided into contact ultrasonic inspection and water immersion ultrasonic inspection. Because some small diameter (diameter less than 150mm) internal welds are not easy to clean after we...

AI Technical Summary

Problems solved by technology

Since the pipe near the pressure vessel is wrapped with an insulation layer, it is troublesome to dismantle it. At the same time, the dose rate of the external environment is relatively high, so it is difficult to detect from the outside

Therefore, the inspection can be carried out from the inside of the pipeline, but the ultrasonic inspection from the inside is divided into contact ultrasonic inspection and water immersion ultrasonic inspection. Because some small diameter (diameter less than 150mm) internal welds are not easy to clean after welding, Welding slag is left on the inner wall. If contact ultrasonic testing is used, the fit of the probe cannot be guaranteed and the test result will be affected. At the same time, the probe holder may be stuck.

[0003] At present, there are relevant ultrasonic automatic inspection devices for pipeline water immersion in China, and the number of welds to be inspected is relatively simple. For some pipelines, several inspection devices are required to complete the inspection requirements of the relevant inspection level.

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