Conjugated pipeline demagnetizer

Abstract

The invention discloses a conjugated pipeline demagnetizer. The conjugated pipeline demagnetizer comprises a switching circuit, a control circuit, a drive circuit and a demagnetizing coil. The switching circuit provides direct current for pipeline demagnetization for the demagnetizing coil. A singlechip is arranged in the control circuit. The drive circuit drives a power switching device in the switching circuit. The switching circuit is formed by sequentially connecting a power grid filter circuit, a first rectification filter circuit, a power conversion circuit, and a second rectification filter circuit. The demagnetizing coil is made from flexible wire and an explosion-proof aviation plug is adopted for connection. The conjugated pipeline demagnetizer has the advantages of high demagnetization and self-shielded characteristic, good adaptability of terminal, and energy conversation and security.

Description

technical field [0001] The invention relates to a conjugate type pipeline degausser for long-distance pipelines with magnetism, belonging to the technical field of pipeline construction. Background technique [0002] Long-distance pipelines refer to long-distance pipelines used to transport commodity media such as oil and gas, cross provinces, cities, cross rivers, roads, etc., and have pressurized pump stations in the middle. As an important part of pipeline transportation, it plays a very important role in the development of our national economy and is known as the artery of the national economy. [0003] Long-distance pipelines are made of large-diameter seamless steel pipes connected by welding. However, seamless steel pipes inevitably have residual magnetism in the process of production, processing, storage and transportation. Pipeline residual magnetism will have adverse effects on welding production. For example, when welding long-distance pipelines with magnets, i...

AI Technical Summary

Problems solved by technology

In addition to the above-mentioned products, the theory of pipeline degaussing in the world is best known in Russia, and the United States and Japan also have research, but simple and efficient long-distance pipeline degaussing equipment is still rare, and related products still have shortcomings in terms of terminal adaptability, energy saving and safety.

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