Rust removal device for inner plastic-coated composite steel pipe

The utility model discloses a derusting device for an inner plastic-coated composite steel pipe, and relates to the field of plastic-coated steel pipe production. The rust removal device for the inner plastic-coated composite steel pipe comprises a steel pipe body and a fixed shell, the fixed shell is located at one end of the steel pipe body, a rust removal mechanism is arranged on the fixed shell and comprises a driving wheel, a rotating shaft is fixedly connected to the driving wheel, a fixed guide rail is fixedly connected to the interior of the fixed shell, and a plurality of driven wheels are movably connected to the fixed guide rail; a movable rod is fixedly connected to the driven wheel, a threaded rod is fixedly connected to the movable rod, and a plurality of limiting frames are movably connected to the limiting guide rail. According to the derusting device for the inner plastic-coated composite steel pipe, when the interior of the steel pipe body needs to be derusted, firstly, a threaded rod and a