Three-dimensional high-definition magnetic leakage internal detection device for gas delivery pipeline

The utility model relates to a three-dimensional high-definition magnetic leakage internal detection device for a gas delivery pipeline. The device comprises an upper skeleton, a lower skeleton, a bypass discharge valve system, odometer wheel systems, an excitation detection unit, a main probe, a universal joint, a sealing rubber cup, a battery cavity, a universal connector, an inner resolution probe and an outer resolution probe. When the device works, the bypass discharge valve system mainly finishes the operation of adjusting the advancing speed of the device running in the gas delivery pipeline, so as to realize the transient speed control and speed control in the steady operation state; the odometer wheel systems achieve the purpose of supporting the device under gravity, so as to ensure that the device is positioned in the center in the pipeline; the sealing rubber cup ensures that the device is in close contact with the inner wall of the gas delivery pipeline, so as to prevent the natural gas fluid fro