Steel tube demagnetizing method and device

Abstract

The invention relates to a demagnetizing method and a demagnetizing device, in particular to a steel tube demagnetizing method and a steel tube demagnetizing device, belonging to the technical field of steel tube demagnetization. According to the technical scheme provided by the invention, the steel tube demagnetizing method includes the following steps of: a, providing a steel tube to be demagnetized and conducting saturation magnetization process on the steel tube by using a magnetizing coil so as to convert the residual magnetisms in the steel tube into magnetic fields with uniform magnetic strength and field direction; and b, sleeving a demagnetizing coil on one end of the steel tube, which generates a magnetic field with corresponding magnetic strength and opposite direction with the magnetic fields in the steel tube to counteract the magnetic strength in the steel tube. The steel tube demagnetizing method and the steel tube demagnetizing device can be used for demagnetization of other materials similar to steel tubes, and the device is simple in structure, convenient in installation and commissioning, low in energy consumption and wide in application range and is safe and reliable.

Description

technical field [0001] The invention relates to a degaussing method and device, in particular to a steel pipe degaussing method and device, belonging to the technical field of steel pipe degaussing. Background technique [0002] Since the steel pipe has two important functions of supporting and conveying, it is widely used in production and life. As a ferromagnetic material, steel pipe will generate residual magnetism under the action of an external magnetic field. The existence of these residual magnetism will cause the steel pipes to exert force on each other, steel pipes and other ferromagnetic materials, which will bring inconvenience to the handling of the steel pipes. At the same time, when welding the steel pipe, the residual magnetism will deflect the arc and affect the welding quality. In addition, residual magnetism will also interfere with electrical and electronic equipment around the steel pipe. [0003] Ferromagnetic materials have remanence because of the o...

AI Technical Summary

Problems solved by technology

AC degaussing is limited by the frequency of AC, which makes the degaussing effect poor, and the degaussed items will have residual magnetism and recovery after being placed for a period of time

DC degaussing needs to select the appropriate degaussing current according to the magnitude of the remanence, but due to the limitation of the linearity of the current adjustment, it is difficult to achieve the ideal degaussing effect, and the current adjustment is very troublesome

In addition, the existing AC and DC degaussing needs to use cables to surround or pass around steel pipes, which makes the equipment bulky and troublesome to install and use.

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