Seafloor pulse vortex detection probe

Abstract

The invention relates to a seafloor pulse vortex detection probe. The seafloor pulse vortex detection probe comprises a sealing base, a sealing cover, a main radiating pipe, a plurality of auxiliary radiating pipes, a detection coil, an exciting coil and a watertight insertion-and-extraction connector. The sealing cover is fixedly arranged at the top of the sealing base, a sealing cabin is formed between the sealing base and the sealing cover, the main radiating pipe is arranged in the center inside the sealing cabin in a penetrating through mode, the auxiliary radiating pipes are circumferentially arranged inside the sealing cabin in a penetrating through mode at intervals, the detection coil is fixedly arranged on the outer side of the circumference surrounded by all the auxiliary radiating pipes, the exciting coil is fixedly arranged on the inner side of the circumference surrounded by all the auxiliary radiating pipes, the detection coil and the exciting coil are both fixedly connected with the bottom of the sealing base, one end of the watertight insertion-and-extraction connector is inserted inside the sealing cabin through the sealing cover, and is respectively connected with the detection coil and the exciting coil, and the other end of the watertight insertion-and-extraction connector is detachably connected with an external device. The seafloor pulse vortex detection probe is suitable for the seafloor sealed environment, and the good radiating effect can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a submarine pulsed eddy current testing probe. Background technique [0002] The offshore oil industry has made significant contributions to the development of the national economy. After decades of development in my country's Bohai Sea and South China Sea, a considerable number of submarine pipelines are close to the design life, and the pipelines are severely corroded and aging. In order to ensure the safe and stable operation of submarine pipelines, Corrosion detection of submarine pipelines is particularly important. Compared with other detection technologies, pulsed eddy current detection can detect the corrosion status of pipelines online without affecting the normal operation of pipelines and without damaging the coating. [0003] The pulsed eddy current detection system is mainly composed of pulsed eddy current detection probe, signal analysis and processin...

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Problems solved by technology

[0003] The pulsed eddy current detection system is mainly composed of pulsed eddy current detection probe, signal analysis and processing system and power supply. Among them, the pulsed eddy current detection probe is an important part of the pulsed eddy current detection system. Excitation current with an amplitude of several amperes is applied to both ends. At this time, if the pulsed eddy current detection probe does not have a good heat dissipation system, the temperature of the excitation coil will rise rapidly, resulting in a temperature drift effect, which will affect the detection accuracy.

[0004] The current detection probe is mainly aimed at the onshore detection environment. The detection probe does not need to be completely sealed so that the outside air can circulate inside it, so the heat dissipation problem is not particularly serious

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