Anti-corrosion supplementary coating device in small-caliber pipeline

The utility model discloses an anti-corrosion supplementary coating device in a small-caliber pipeline, which comprises a device main body, a supporting mechanism, a cleaning mechanism, a brushing mechanism, a feeding mechanism and a plurality of telescopic pipeline fixing devices, the feeding mechanism comprises a feeding nozzle, the tail part of the device main body is provided with a push rod, and the head part of the device main body is respectively provided with a driving rotating shaft and the feeding nozzle; the cleaning mechanism and the brushing mechanism are arranged on the driving rotating shaft, the supporting mechanism surrounds the device body, the device body makes contact with the inner wall of the pipeline through the supporting mechanism, and the telescopic pipeline fixing devices are arranged at intervals in the extending direction of the pipeline. The device can replace manual work to enter a small-caliber pipeline, the driving rotating shaft is used for driving the cleaning mechanism to r