Plastic-coated composite steel pipe shot blasting device and method

The invention discloses a plastic-coated composite steel pipe shot blasting device and method.The plastic-coated composite steel pipe shot blasting device comprises two L-shaped plates, the two L-shaped plates are arranged in a bilateral symmetry mode, two rollers are arranged between the two L-shaped plates, and first rotating shafts are arranged at the circle centers of the two rollers in a penetrating mode and fixedly connected with the two rollers; the left ends and the right ends of the two first rotating shafts are inserted into the adjacent L-shaped plates, and a motor is arranged on the left side of the L-shaped plate located on the left side. Through mutual cooperation of a conveying belt, a roller, a belt, a driving grooved wheel, a driven grooved wheel, a conveying belt, a vertical plate, a second concave plate, a first concave plate, an upper wheel, a lower wheel, a connecting plate, an L-shaped plate, an external rust removal device, an internal rust removal device and other parts, when a motor i