1. Rust Removal Principle: Rust on the steel pipe  surface is removed through automatic shot blasting operations. The    high-speed shot stream emitted by the efficient shot blaster shatters the  oxide scale, rust layer, and debris on the inner surface of the steel pipe.

2. Processing Advantages: This process achieves a fine and bright finish on the steel pipe surface while enhancing the workpiece's tensile and compressive strength. It provides stronger adhesion for subsequent inner surface painting, ultimately realizing anti-corrosion, pipe protection, and extension of the steel pipe's service life.

3. Standards Compliance: After cleaning, the cleanliness and roughness of the workpiece both meet the relevant national and industry standard requirements.

The inner wall cleaning process of the equipment follows a strict action logic, with the specific steps as follows:

1.Loading and Conveying: The first step is to load the steel pipe onto the conveying trolley via the hydraulic loading mechanism; three conveying trolleys synchronously drive the steel pipe to move towards the fixed sealing chamber.

2. Sealing and Positioning: After the steel pipe moves to the predetermined position, the conveying trolley stops; then the fixed sealing chamber and the mobile hydraulic shot blaster move synchronously towards the other end of the steel pipe. Once the pipe end is fully sealed and reaches the detection position, the mobile sealing chamber stops, at which point the steel pipe is in a fully enclosed state (to prevent shot spillage and dust overflow).

3. Start Cleaning: The mobile hydraulic shot blaster reaches the end of the fixed sealing chamber driven by the trolley; subsequently, the following mechanisms are started in sequence: steel pipe rotation mechanism, inner blasting head, shot conveying mechanism, dust removal system, and inner blasting head mobile trolley.

4. Complete Cleaning: Under the coordination of steel pipe rotation and inner blasting head movement, the inner blasting head continuously blasts shots towards the steel pipe sidewall; when the inner blasting head completely passes through the steel pipe, the inner wall cleaning operation of the steel pipe is completed.