Small-diameter spiral heat exchange tube magnetic flux leakage inner detecting device and series-parallel detecting method

Abstract

The invention discloses a small-diameter spiral heat exchange tube magnetic flux leakage inner detecting device and a series-parallel detecting method and relates to a spiral heat exchange tube magnetic flux leakage inner detecting technology. The device achieves the magnetic flux leakage inner detection of a small-diameter spiral heat exchange tube. The device includes a probe driving mechanism and at least one detecting probe. The probe driving mechanism drives the detecting probe to move in a heat exchange tube. The detecting probe comprises an intermediate connecting body, magnetized bodies sequentially coaxially disposed at two ends of the intermediate connecting body, a steel ball support body and end connectors. Each magnetized body comprises an armature, a magnet and a steel tube cylinder arranged along a peripheral shaft. The multiple detecting probes are connected in series in a single tube, and the multiple detecting probes in the multiple tubes are connected in parallel anddetect multiple tubes at the same time so that the efficiency of detection is greatly improved and time and labor are saved.

Description

technical field [0001] The invention relates to a magnetic flux leakage internal detection device and a detection method of a spiral heat exchange tube, in particular to an internal detection device and a detection method for a series-parallel connection of a small-diameter spiral heat exchange tube magnetic flux leakage. Background of the invention [0002] In today's world, energy is one of the most important issues faced by human beings. The development, conversion and utilization of energy is an important issue for all countries. Heat exchangers are widely used in chemical industry, metallurgy, transportation, aviation and aerospace and other departments, and are one of the indispensable equipment in the process of energy utilization. About 40% of the equipment in oil refining and chemical plants are heat exchangers, accounting for 30% to 45% of the total investment. The heat exchanger is not only expensive to invest, but also the quality of the heat exchanger is a dire...

AI Technical Summary

Problems solved by technology

[0004] The safety status of the spiral heat exchange tube has a crucial impact on production and operation. Once it leaks, it will cause material mixing, which will affect the normal production, and cause a fire accident if it is serious.

If the spiral heat exchange tube is corroded to a certain extent, it will affect the use of the heat exchange equipment, and it needs to be repaired and replaced. If the corrosion defect cannot be found in time, the heat exchange tube will run with hidden dangers, which will affect the safety and stability of the device. , long-term operation

However, due to the structural shape of the spiral heat exchange tube, it is difficult to implement its safety inspection

[0005] At present, the defect detection technology for straight heat exchange tubes and large-diameter spiral heat exchange tubes has become increasingly mature, but there is no relevant technology for the safety detection of small-diameter spiral heat exchange tubes.

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